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1da177e4 LT |
1 | /* |
2 | * linux/drivers/char/synclink.c | |
3 | * | |
4a918bc2 | 4 | * $Id: synclink.c,v 4.37 2005/09/07 13:13:19 paulkf Exp $ |
1da177e4 LT |
5 | * |
6 | * Device driver for Microgate SyncLink ISA and PCI | |
7 | * high speed multiprotocol serial adapters. | |
8 | * | |
9 | * written by Paul Fulghum for Microgate Corporation | |
10 | * paulkf@microgate.com | |
11 | * | |
12 | * Microgate and SyncLink are trademarks of Microgate Corporation | |
13 | * | |
14 | * Derived from serial.c written by Theodore Ts'o and Linus Torvalds | |
15 | * | |
16 | * Original release 01/11/99 | |
17 | * | |
18 | * This code is released under the GNU General Public License (GPL) | |
19 | * | |
20 | * This driver is primarily intended for use in synchronous | |
21 | * HDLC mode. Asynchronous mode is also provided. | |
22 | * | |
23 | * When operating in synchronous mode, each call to mgsl_write() | |
24 | * contains exactly one complete HDLC frame. Calling mgsl_put_char | |
25 | * will start assembling an HDLC frame that will not be sent until | |
26 | * mgsl_flush_chars or mgsl_write is called. | |
27 | * | |
28 | * Synchronous receive data is reported as complete frames. To accomplish | |
29 | * this, the TTY flip buffer is bypassed (too small to hold largest | |
30 | * frame and may fragment frames) and the line discipline | |
31 | * receive entry point is called directly. | |
32 | * | |
33 | * This driver has been tested with a slightly modified ppp.c driver | |
34 | * for synchronous PPP. | |
35 | * | |
36 | * 2000/02/16 | |
37 | * Added interface for syncppp.c driver (an alternate synchronous PPP | |
38 | * implementation that also supports Cisco HDLC). Each device instance | |
39 | * registers as a tty device AND a network device (if dosyncppp option | |
40 | * is set for the device). The functionality is determined by which | |
41 | * device interface is opened. | |
42 | * | |
43 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
44 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
45 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
46 | * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, | |
47 | * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
48 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR | |
49 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
50 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
51 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
52 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
53 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
54 | */ | |
55 | ||
56 | #if defined(__i386__) | |
57 | # define BREAKPOINT() asm(" int $3"); | |
58 | #else | |
59 | # define BREAKPOINT() { } | |
60 | #endif | |
61 | ||
62 | #define MAX_ISA_DEVICES 10 | |
63 | #define MAX_PCI_DEVICES 10 | |
64 | #define MAX_TOTAL_DEVICES 20 | |
65 | ||
66 | #include <linux/config.h> | |
67 | #include <linux/module.h> | |
68 | #include <linux/errno.h> | |
69 | #include <linux/signal.h> | |
70 | #include <linux/sched.h> | |
71 | #include <linux/timer.h> | |
72 | #include <linux/interrupt.h> | |
73 | #include <linux/pci.h> | |
74 | #include <linux/tty.h> | |
75 | #include <linux/tty_flip.h> | |
76 | #include <linux/serial.h> | |
77 | #include <linux/major.h> | |
78 | #include <linux/string.h> | |
79 | #include <linux/fcntl.h> | |
80 | #include <linux/ptrace.h> | |
81 | #include <linux/ioport.h> | |
82 | #include <linux/mm.h> | |
83 | #include <linux/slab.h> | |
84 | #include <linux/delay.h> | |
85 | ||
86 | #include <linux/netdevice.h> | |
87 | ||
88 | #include <linux/vmalloc.h> | |
89 | #include <linux/init.h> | |
90 | #include <asm/serial.h> | |
91 | ||
92 | #include <linux/delay.h> | |
93 | #include <linux/ioctl.h> | |
94 | ||
95 | #include <asm/system.h> | |
96 | #include <asm/io.h> | |
97 | #include <asm/irq.h> | |
98 | #include <asm/dma.h> | |
99 | #include <linux/bitops.h> | |
100 | #include <asm/types.h> | |
101 | #include <linux/termios.h> | |
102 | #include <linux/workqueue.h> | |
103 | #include <linux/hdlc.h> | |
104 | ||
105 | #ifdef CONFIG_HDLC_MODULE | |
106 | #define CONFIG_HDLC 1 | |
107 | #endif | |
108 | ||
109 | #define GET_USER(error,value,addr) error = get_user(value,addr) | |
110 | #define COPY_FROM_USER(error,dest,src,size) error = copy_from_user(dest,src,size) ? -EFAULT : 0 | |
111 | #define PUT_USER(error,value,addr) error = put_user(value,addr) | |
112 | #define COPY_TO_USER(error,dest,src,size) error = copy_to_user(dest,src,size) ? -EFAULT : 0 | |
113 | ||
114 | #include <asm/uaccess.h> | |
115 | ||
116 | #include "linux/synclink.h" | |
117 | ||
118 | #define RCLRVALUE 0xffff | |
119 | ||
120 | static MGSL_PARAMS default_params = { | |
121 | MGSL_MODE_HDLC, /* unsigned long mode */ | |
122 | 0, /* unsigned char loopback; */ | |
123 | HDLC_FLAG_UNDERRUN_ABORT15, /* unsigned short flags; */ | |
124 | HDLC_ENCODING_NRZI_SPACE, /* unsigned char encoding; */ | |
125 | 0, /* unsigned long clock_speed; */ | |
126 | 0xff, /* unsigned char addr_filter; */ | |
127 | HDLC_CRC_16_CCITT, /* unsigned short crc_type; */ | |
128 | HDLC_PREAMBLE_LENGTH_8BITS, /* unsigned char preamble_length; */ | |
129 | HDLC_PREAMBLE_PATTERN_NONE, /* unsigned char preamble; */ | |
130 | 9600, /* unsigned long data_rate; */ | |
131 | 8, /* unsigned char data_bits; */ | |
132 | 1, /* unsigned char stop_bits; */ | |
133 | ASYNC_PARITY_NONE /* unsigned char parity; */ | |
134 | }; | |
135 | ||
136 | #define SHARED_MEM_ADDRESS_SIZE 0x40000 | |
137 | #define BUFFERLISTSIZE (PAGE_SIZE) | |
138 | #define DMABUFFERSIZE (PAGE_SIZE) | |
139 | #define MAXRXFRAMES 7 | |
140 | ||
141 | typedef struct _DMABUFFERENTRY | |
142 | { | |
143 | u32 phys_addr; /* 32-bit flat physical address of data buffer */ | |
4a918bc2 PF |
144 | volatile u16 count; /* buffer size/data count */ |
145 | volatile u16 status; /* Control/status field */ | |
146 | volatile u16 rcc; /* character count field */ | |
1da177e4 LT |
147 | u16 reserved; /* padding required by 16C32 */ |
148 | u32 link; /* 32-bit flat link to next buffer entry */ | |
149 | char *virt_addr; /* virtual address of data buffer */ | |
150 | u32 phys_entry; /* physical address of this buffer entry */ | |
151 | } DMABUFFERENTRY, *DMAPBUFFERENTRY; | |
152 | ||
153 | /* The queue of BH actions to be performed */ | |
154 | ||
155 | #define BH_RECEIVE 1 | |
156 | #define BH_TRANSMIT 2 | |
157 | #define BH_STATUS 4 | |
158 | ||
159 | #define IO_PIN_SHUTDOWN_LIMIT 100 | |
160 | ||
161 | #define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK)) | |
162 | ||
163 | struct _input_signal_events { | |
164 | int ri_up; | |
165 | int ri_down; | |
166 | int dsr_up; | |
167 | int dsr_down; | |
168 | int dcd_up; | |
169 | int dcd_down; | |
170 | int cts_up; | |
171 | int cts_down; | |
172 | }; | |
173 | ||
174 | /* transmit holding buffer definitions*/ | |
175 | #define MAX_TX_HOLDING_BUFFERS 5 | |
176 | struct tx_holding_buffer { | |
177 | int buffer_size; | |
178 | unsigned char * buffer; | |
179 | }; | |
180 | ||
181 | ||
182 | /* | |
183 | * Device instance data structure | |
184 | */ | |
185 | ||
186 | struct mgsl_struct { | |
187 | int magic; | |
188 | int flags; | |
189 | int count; /* count of opens */ | |
190 | int line; | |
191 | int hw_version; | |
192 | unsigned short close_delay; | |
193 | unsigned short closing_wait; /* time to wait before closing */ | |
194 | ||
195 | struct mgsl_icount icount; | |
196 | ||
197 | struct tty_struct *tty; | |
198 | int timeout; | |
199 | int x_char; /* xon/xoff character */ | |
200 | int blocked_open; /* # of blocked opens */ | |
201 | u16 read_status_mask; | |
202 | u16 ignore_status_mask; | |
203 | unsigned char *xmit_buf; | |
204 | int xmit_head; | |
205 | int xmit_tail; | |
206 | int xmit_cnt; | |
207 | ||
208 | wait_queue_head_t open_wait; | |
209 | wait_queue_head_t close_wait; | |
210 | ||
211 | wait_queue_head_t status_event_wait_q; | |
212 | wait_queue_head_t event_wait_q; | |
213 | struct timer_list tx_timer; /* HDLC transmit timeout timer */ | |
214 | struct mgsl_struct *next_device; /* device list link */ | |
215 | ||
216 | spinlock_t irq_spinlock; /* spinlock for synchronizing with ISR */ | |
217 | struct work_struct task; /* task structure for scheduling bh */ | |
218 | ||
219 | u32 EventMask; /* event trigger mask */ | |
220 | u32 RecordedEvents; /* pending events */ | |
221 | ||
222 | u32 max_frame_size; /* as set by device config */ | |
223 | ||
224 | u32 pending_bh; | |
225 | ||
226 | int bh_running; /* Protection from multiple */ | |
227 | int isr_overflow; | |
228 | int bh_requested; | |
229 | ||
230 | int dcd_chkcount; /* check counts to prevent */ | |
231 | int cts_chkcount; /* too many IRQs if a signal */ | |
232 | int dsr_chkcount; /* is floating */ | |
233 | int ri_chkcount; | |
234 | ||
235 | char *buffer_list; /* virtual address of Rx & Tx buffer lists */ | |
236 | unsigned long buffer_list_phys; | |
237 | ||
238 | unsigned int rx_buffer_count; /* count of total allocated Rx buffers */ | |
239 | DMABUFFERENTRY *rx_buffer_list; /* list of receive buffer entries */ | |
240 | unsigned int current_rx_buffer; | |
241 | ||
242 | int num_tx_dma_buffers; /* number of tx dma frames required */ | |
243 | int tx_dma_buffers_used; | |
244 | unsigned int tx_buffer_count; /* count of total allocated Tx buffers */ | |
245 | DMABUFFERENTRY *tx_buffer_list; /* list of transmit buffer entries */ | |
246 | int start_tx_dma_buffer; /* tx dma buffer to start tx dma operation */ | |
247 | int current_tx_buffer; /* next tx dma buffer to be loaded */ | |
248 | ||
249 | unsigned char *intermediate_rxbuffer; | |
250 | ||
251 | int num_tx_holding_buffers; /* number of tx holding buffer allocated */ | |
252 | int get_tx_holding_index; /* next tx holding buffer for adapter to load */ | |
253 | int put_tx_holding_index; /* next tx holding buffer to store user request */ | |
254 | int tx_holding_count; /* number of tx holding buffers waiting */ | |
255 | struct tx_holding_buffer tx_holding_buffers[MAX_TX_HOLDING_BUFFERS]; | |
256 | ||
257 | int rx_enabled; | |
258 | int rx_overflow; | |
259 | int rx_rcc_underrun; | |
260 | ||
261 | int tx_enabled; | |
262 | int tx_active; | |
263 | u32 idle_mode; | |
264 | ||
265 | u16 cmr_value; | |
266 | u16 tcsr_value; | |
267 | ||
268 | char device_name[25]; /* device instance name */ | |
269 | ||
270 | unsigned int bus_type; /* expansion bus type (ISA,EISA,PCI) */ | |
271 | unsigned char bus; /* expansion bus number (zero based) */ | |
272 | unsigned char function; /* PCI device number */ | |
273 | ||
274 | unsigned int io_base; /* base I/O address of adapter */ | |
275 | unsigned int io_addr_size; /* size of the I/O address range */ | |
276 | int io_addr_requested; /* nonzero if I/O address requested */ | |
277 | ||
278 | unsigned int irq_level; /* interrupt level */ | |
279 | unsigned long irq_flags; | |
280 | int irq_requested; /* nonzero if IRQ requested */ | |
281 | ||
282 | unsigned int dma_level; /* DMA channel */ | |
283 | int dma_requested; /* nonzero if dma channel requested */ | |
284 | ||
285 | u16 mbre_bit; | |
286 | u16 loopback_bits; | |
287 | u16 usc_idle_mode; | |
288 | ||
289 | MGSL_PARAMS params; /* communications parameters */ | |
290 | ||
291 | unsigned char serial_signals; /* current serial signal states */ | |
292 | ||
293 | int irq_occurred; /* for diagnostics use */ | |
294 | unsigned int init_error; /* Initialization startup error (DIAGS) */ | |
295 | int fDiagnosticsmode; /* Driver in Diagnostic mode? (DIAGS) */ | |
296 | ||
297 | u32 last_mem_alloc; | |
298 | unsigned char* memory_base; /* shared memory address (PCI only) */ | |
299 | u32 phys_memory_base; | |
300 | int shared_mem_requested; | |
301 | ||
302 | unsigned char* lcr_base; /* local config registers (PCI only) */ | |
303 | u32 phys_lcr_base; | |
304 | u32 lcr_offset; | |
305 | int lcr_mem_requested; | |
306 | ||
307 | u32 misc_ctrl_value; | |
308 | char flag_buf[MAX_ASYNC_BUFFER_SIZE]; | |
309 | char char_buf[MAX_ASYNC_BUFFER_SIZE]; | |
310 | BOOLEAN drop_rts_on_tx_done; | |
311 | ||
312 | BOOLEAN loopmode_insert_requested; | |
313 | BOOLEAN loopmode_send_done_requested; | |
314 | ||
315 | struct _input_signal_events input_signal_events; | |
316 | ||
317 | /* generic HDLC device parts */ | |
318 | int netcount; | |
319 | int dosyncppp; | |
320 | spinlock_t netlock; | |
321 | ||
322 | #ifdef CONFIG_HDLC | |
323 | struct net_device *netdev; | |
324 | #endif | |
325 | }; | |
326 | ||
327 | #define MGSL_MAGIC 0x5401 | |
328 | ||
329 | /* | |
330 | * The size of the serial xmit buffer is 1 page, or 4096 bytes | |
331 | */ | |
332 | #ifndef SERIAL_XMIT_SIZE | |
333 | #define SERIAL_XMIT_SIZE 4096 | |
334 | #endif | |
335 | ||
336 | /* | |
337 | * These macros define the offsets used in calculating the | |
338 | * I/O address of the specified USC registers. | |
339 | */ | |
340 | ||
341 | ||
342 | #define DCPIN 2 /* Bit 1 of I/O address */ | |
343 | #define SDPIN 4 /* Bit 2 of I/O address */ | |
344 | ||
345 | #define DCAR 0 /* DMA command/address register */ | |
346 | #define CCAR SDPIN /* channel command/address register */ | |
347 | #define DATAREG DCPIN + SDPIN /* serial data register */ | |
348 | #define MSBONLY 0x41 | |
349 | #define LSBONLY 0x40 | |
350 | ||
351 | /* | |
352 | * These macros define the register address (ordinal number) | |
353 | * used for writing address/value pairs to the USC. | |
354 | */ | |
355 | ||
356 | #define CMR 0x02 /* Channel mode Register */ | |
357 | #define CCSR 0x04 /* Channel Command/status Register */ | |
358 | #define CCR 0x06 /* Channel Control Register */ | |
359 | #define PSR 0x08 /* Port status Register */ | |
360 | #define PCR 0x0a /* Port Control Register */ | |
361 | #define TMDR 0x0c /* Test mode Data Register */ | |
362 | #define TMCR 0x0e /* Test mode Control Register */ | |
363 | #define CMCR 0x10 /* Clock mode Control Register */ | |
364 | #define HCR 0x12 /* Hardware Configuration Register */ | |
365 | #define IVR 0x14 /* Interrupt Vector Register */ | |
366 | #define IOCR 0x16 /* Input/Output Control Register */ | |
367 | #define ICR 0x18 /* Interrupt Control Register */ | |
368 | #define DCCR 0x1a /* Daisy Chain Control Register */ | |
369 | #define MISR 0x1c /* Misc Interrupt status Register */ | |
370 | #define SICR 0x1e /* status Interrupt Control Register */ | |
371 | #define RDR 0x20 /* Receive Data Register */ | |
372 | #define RMR 0x22 /* Receive mode Register */ | |
373 | #define RCSR 0x24 /* Receive Command/status Register */ | |
374 | #define RICR 0x26 /* Receive Interrupt Control Register */ | |
375 | #define RSR 0x28 /* Receive Sync Register */ | |
376 | #define RCLR 0x2a /* Receive count Limit Register */ | |
377 | #define RCCR 0x2c /* Receive Character count Register */ | |
378 | #define TC0R 0x2e /* Time Constant 0 Register */ | |
379 | #define TDR 0x30 /* Transmit Data Register */ | |
380 | #define TMR 0x32 /* Transmit mode Register */ | |
381 | #define TCSR 0x34 /* Transmit Command/status Register */ | |
382 | #define TICR 0x36 /* Transmit Interrupt Control Register */ | |
383 | #define TSR 0x38 /* Transmit Sync Register */ | |
384 | #define TCLR 0x3a /* Transmit count Limit Register */ | |
385 | #define TCCR 0x3c /* Transmit Character count Register */ | |
386 | #define TC1R 0x3e /* Time Constant 1 Register */ | |
387 | ||
388 | ||
389 | /* | |
390 | * MACRO DEFINITIONS FOR DMA REGISTERS | |
391 | */ | |
392 | ||
393 | #define DCR 0x06 /* DMA Control Register (shared) */ | |
394 | #define DACR 0x08 /* DMA Array count Register (shared) */ | |
395 | #define BDCR 0x12 /* Burst/Dwell Control Register (shared) */ | |
396 | #define DIVR 0x14 /* DMA Interrupt Vector Register (shared) */ | |
397 | #define DICR 0x18 /* DMA Interrupt Control Register (shared) */ | |
398 | #define CDIR 0x1a /* Clear DMA Interrupt Register (shared) */ | |
399 | #define SDIR 0x1c /* Set DMA Interrupt Register (shared) */ | |
400 | ||
401 | #define TDMR 0x02 /* Transmit DMA mode Register */ | |
402 | #define TDIAR 0x1e /* Transmit DMA Interrupt Arm Register */ | |
403 | #define TBCR 0x2a /* Transmit Byte count Register */ | |
404 | #define TARL 0x2c /* Transmit Address Register (low) */ | |
405 | #define TARU 0x2e /* Transmit Address Register (high) */ | |
406 | #define NTBCR 0x3a /* Next Transmit Byte count Register */ | |
407 | #define NTARL 0x3c /* Next Transmit Address Register (low) */ | |
408 | #define NTARU 0x3e /* Next Transmit Address Register (high) */ | |
409 | ||
410 | #define RDMR 0x82 /* Receive DMA mode Register (non-shared) */ | |
411 | #define RDIAR 0x9e /* Receive DMA Interrupt Arm Register */ | |
412 | #define RBCR 0xaa /* Receive Byte count Register */ | |
413 | #define RARL 0xac /* Receive Address Register (low) */ | |
414 | #define RARU 0xae /* Receive Address Register (high) */ | |
415 | #define NRBCR 0xba /* Next Receive Byte count Register */ | |
416 | #define NRARL 0xbc /* Next Receive Address Register (low) */ | |
417 | #define NRARU 0xbe /* Next Receive Address Register (high) */ | |
418 | ||
419 | ||
420 | /* | |
421 | * MACRO DEFINITIONS FOR MODEM STATUS BITS | |
422 | */ | |
423 | ||
424 | #define MODEMSTATUS_DTR 0x80 | |
425 | #define MODEMSTATUS_DSR 0x40 | |
426 | #define MODEMSTATUS_RTS 0x20 | |
427 | #define MODEMSTATUS_CTS 0x10 | |
428 | #define MODEMSTATUS_RI 0x04 | |
429 | #define MODEMSTATUS_DCD 0x01 | |
430 | ||
431 | ||
432 | /* | |
433 | * Channel Command/Address Register (CCAR) Command Codes | |
434 | */ | |
435 | ||
436 | #define RTCmd_Null 0x0000 | |
437 | #define RTCmd_ResetHighestIus 0x1000 | |
438 | #define RTCmd_TriggerChannelLoadDma 0x2000 | |
439 | #define RTCmd_TriggerRxDma 0x2800 | |
440 | #define RTCmd_TriggerTxDma 0x3000 | |
441 | #define RTCmd_TriggerRxAndTxDma 0x3800 | |
442 | #define RTCmd_PurgeRxFifo 0x4800 | |
443 | #define RTCmd_PurgeTxFifo 0x5000 | |
444 | #define RTCmd_PurgeRxAndTxFifo 0x5800 | |
445 | #define RTCmd_LoadRcc 0x6800 | |
446 | #define RTCmd_LoadTcc 0x7000 | |
447 | #define RTCmd_LoadRccAndTcc 0x7800 | |
448 | #define RTCmd_LoadTC0 0x8800 | |
449 | #define RTCmd_LoadTC1 0x9000 | |
450 | #define RTCmd_LoadTC0AndTC1 0x9800 | |
451 | #define RTCmd_SerialDataLSBFirst 0xa000 | |
452 | #define RTCmd_SerialDataMSBFirst 0xa800 | |
453 | #define RTCmd_SelectBigEndian 0xb000 | |
454 | #define RTCmd_SelectLittleEndian 0xb800 | |
455 | ||
456 | ||
457 | /* | |
458 | * DMA Command/Address Register (DCAR) Command Codes | |
459 | */ | |
460 | ||
461 | #define DmaCmd_Null 0x0000 | |
462 | #define DmaCmd_ResetTxChannel 0x1000 | |
463 | #define DmaCmd_ResetRxChannel 0x1200 | |
464 | #define DmaCmd_StartTxChannel 0x2000 | |
465 | #define DmaCmd_StartRxChannel 0x2200 | |
466 | #define DmaCmd_ContinueTxChannel 0x3000 | |
467 | #define DmaCmd_ContinueRxChannel 0x3200 | |
468 | #define DmaCmd_PauseTxChannel 0x4000 | |
469 | #define DmaCmd_PauseRxChannel 0x4200 | |
470 | #define DmaCmd_AbortTxChannel 0x5000 | |
471 | #define DmaCmd_AbortRxChannel 0x5200 | |
472 | #define DmaCmd_InitTxChannel 0x7000 | |
473 | #define DmaCmd_InitRxChannel 0x7200 | |
474 | #define DmaCmd_ResetHighestDmaIus 0x8000 | |
475 | #define DmaCmd_ResetAllChannels 0x9000 | |
476 | #define DmaCmd_StartAllChannels 0xa000 | |
477 | #define DmaCmd_ContinueAllChannels 0xb000 | |
478 | #define DmaCmd_PauseAllChannels 0xc000 | |
479 | #define DmaCmd_AbortAllChannels 0xd000 | |
480 | #define DmaCmd_InitAllChannels 0xf000 | |
481 | ||
482 | #define TCmd_Null 0x0000 | |
483 | #define TCmd_ClearTxCRC 0x2000 | |
484 | #define TCmd_SelectTicrTtsaData 0x4000 | |
485 | #define TCmd_SelectTicrTxFifostatus 0x5000 | |
486 | #define TCmd_SelectTicrIntLevel 0x6000 | |
487 | #define TCmd_SelectTicrdma_level 0x7000 | |
488 | #define TCmd_SendFrame 0x8000 | |
489 | #define TCmd_SendAbort 0x9000 | |
490 | #define TCmd_EnableDleInsertion 0xc000 | |
491 | #define TCmd_DisableDleInsertion 0xd000 | |
492 | #define TCmd_ClearEofEom 0xe000 | |
493 | #define TCmd_SetEofEom 0xf000 | |
494 | ||
495 | #define RCmd_Null 0x0000 | |
496 | #define RCmd_ClearRxCRC 0x2000 | |
497 | #define RCmd_EnterHuntmode 0x3000 | |
498 | #define RCmd_SelectRicrRtsaData 0x4000 | |
499 | #define RCmd_SelectRicrRxFifostatus 0x5000 | |
500 | #define RCmd_SelectRicrIntLevel 0x6000 | |
501 | #define RCmd_SelectRicrdma_level 0x7000 | |
502 | ||
503 | /* | |
504 | * Bits for enabling and disabling IRQs in Interrupt Control Register (ICR) | |
505 | */ | |
506 | ||
507 | #define RECEIVE_STATUS BIT5 | |
508 | #define RECEIVE_DATA BIT4 | |
509 | #define TRANSMIT_STATUS BIT3 | |
510 | #define TRANSMIT_DATA BIT2 | |
511 | #define IO_PIN BIT1 | |
512 | #define MISC BIT0 | |
513 | ||
514 | ||
515 | /* | |
516 | * Receive status Bits in Receive Command/status Register RCSR | |
517 | */ | |
518 | ||
519 | #define RXSTATUS_SHORT_FRAME BIT8 | |
520 | #define RXSTATUS_CODE_VIOLATION BIT8 | |
521 | #define RXSTATUS_EXITED_HUNT BIT7 | |
522 | #define RXSTATUS_IDLE_RECEIVED BIT6 | |
523 | #define RXSTATUS_BREAK_RECEIVED BIT5 | |
524 | #define RXSTATUS_ABORT_RECEIVED BIT5 | |
525 | #define RXSTATUS_RXBOUND BIT4 | |
526 | #define RXSTATUS_CRC_ERROR BIT3 | |
527 | #define RXSTATUS_FRAMING_ERROR BIT3 | |
528 | #define RXSTATUS_ABORT BIT2 | |
529 | #define RXSTATUS_PARITY_ERROR BIT2 | |
530 | #define RXSTATUS_OVERRUN BIT1 | |
531 | #define RXSTATUS_DATA_AVAILABLE BIT0 | |
532 | #define RXSTATUS_ALL 0x01f6 | |
533 | #define usc_UnlatchRxstatusBits(a,b) usc_OutReg( (a), RCSR, (u16)((b) & RXSTATUS_ALL) ) | |
534 | ||
535 | /* | |
536 | * Values for setting transmit idle mode in | |
537 | * Transmit Control/status Register (TCSR) | |
538 | */ | |
539 | #define IDLEMODE_FLAGS 0x0000 | |
540 | #define IDLEMODE_ALT_ONE_ZERO 0x0100 | |
541 | #define IDLEMODE_ZERO 0x0200 | |
542 | #define IDLEMODE_ONE 0x0300 | |
543 | #define IDLEMODE_ALT_MARK_SPACE 0x0500 | |
544 | #define IDLEMODE_SPACE 0x0600 | |
545 | #define IDLEMODE_MARK 0x0700 | |
546 | #define IDLEMODE_MASK 0x0700 | |
547 | ||
548 | /* | |
549 | * IUSC revision identifiers | |
550 | */ | |
551 | #define IUSC_SL1660 0x4d44 | |
552 | #define IUSC_PRE_SL1660 0x4553 | |
553 | ||
554 | /* | |
555 | * Transmit status Bits in Transmit Command/status Register (TCSR) | |
556 | */ | |
557 | ||
558 | #define TCSR_PRESERVE 0x0F00 | |
559 | ||
560 | #define TCSR_UNDERWAIT BIT11 | |
561 | #define TXSTATUS_PREAMBLE_SENT BIT7 | |
562 | #define TXSTATUS_IDLE_SENT BIT6 | |
563 | #define TXSTATUS_ABORT_SENT BIT5 | |
564 | #define TXSTATUS_EOF_SENT BIT4 | |
565 | #define TXSTATUS_EOM_SENT BIT4 | |
566 | #define TXSTATUS_CRC_SENT BIT3 | |
567 | #define TXSTATUS_ALL_SENT BIT2 | |
568 | #define TXSTATUS_UNDERRUN BIT1 | |
569 | #define TXSTATUS_FIFO_EMPTY BIT0 | |
570 | #define TXSTATUS_ALL 0x00fa | |
571 | #define usc_UnlatchTxstatusBits(a,b) usc_OutReg( (a), TCSR, (u16)((a)->tcsr_value + ((b) & 0x00FF)) ) | |
572 | ||
573 | ||
574 | #define MISCSTATUS_RXC_LATCHED BIT15 | |
575 | #define MISCSTATUS_RXC BIT14 | |
576 | #define MISCSTATUS_TXC_LATCHED BIT13 | |
577 | #define MISCSTATUS_TXC BIT12 | |
578 | #define MISCSTATUS_RI_LATCHED BIT11 | |
579 | #define MISCSTATUS_RI BIT10 | |
580 | #define MISCSTATUS_DSR_LATCHED BIT9 | |
581 | #define MISCSTATUS_DSR BIT8 | |
582 | #define MISCSTATUS_DCD_LATCHED BIT7 | |
583 | #define MISCSTATUS_DCD BIT6 | |
584 | #define MISCSTATUS_CTS_LATCHED BIT5 | |
585 | #define MISCSTATUS_CTS BIT4 | |
586 | #define MISCSTATUS_RCC_UNDERRUN BIT3 | |
587 | #define MISCSTATUS_DPLL_NO_SYNC BIT2 | |
588 | #define MISCSTATUS_BRG1_ZERO BIT1 | |
589 | #define MISCSTATUS_BRG0_ZERO BIT0 | |
590 | ||
591 | #define usc_UnlatchIostatusBits(a,b) usc_OutReg((a),MISR,(u16)((b) & 0xaaa0)) | |
592 | #define usc_UnlatchMiscstatusBits(a,b) usc_OutReg((a),MISR,(u16)((b) & 0x000f)) | |
593 | ||
594 | #define SICR_RXC_ACTIVE BIT15 | |
595 | #define SICR_RXC_INACTIVE BIT14 | |
596 | #define SICR_RXC (BIT15+BIT14) | |
597 | #define SICR_TXC_ACTIVE BIT13 | |
598 | #define SICR_TXC_INACTIVE BIT12 | |
599 | #define SICR_TXC (BIT13+BIT12) | |
600 | #define SICR_RI_ACTIVE BIT11 | |
601 | #define SICR_RI_INACTIVE BIT10 | |
602 | #define SICR_RI (BIT11+BIT10) | |
603 | #define SICR_DSR_ACTIVE BIT9 | |
604 | #define SICR_DSR_INACTIVE BIT8 | |
605 | #define SICR_DSR (BIT9+BIT8) | |
606 | #define SICR_DCD_ACTIVE BIT7 | |
607 | #define SICR_DCD_INACTIVE BIT6 | |
608 | #define SICR_DCD (BIT7+BIT6) | |
609 | #define SICR_CTS_ACTIVE BIT5 | |
610 | #define SICR_CTS_INACTIVE BIT4 | |
611 | #define SICR_CTS (BIT5+BIT4) | |
612 | #define SICR_RCC_UNDERFLOW BIT3 | |
613 | #define SICR_DPLL_NO_SYNC BIT2 | |
614 | #define SICR_BRG1_ZERO BIT1 | |
615 | #define SICR_BRG0_ZERO BIT0 | |
616 | ||
617 | void usc_DisableMasterIrqBit( struct mgsl_struct *info ); | |
618 | void usc_EnableMasterIrqBit( struct mgsl_struct *info ); | |
619 | void usc_EnableInterrupts( struct mgsl_struct *info, u16 IrqMask ); | |
620 | void usc_DisableInterrupts( struct mgsl_struct *info, u16 IrqMask ); | |
621 | void usc_ClearIrqPendingBits( struct mgsl_struct *info, u16 IrqMask ); | |
622 | ||
623 | #define usc_EnableInterrupts( a, b ) \ | |
624 | usc_OutReg( (a), ICR, (u16)((usc_InReg((a),ICR) & 0xff00) + 0xc0 + (b)) ) | |
625 | ||
626 | #define usc_DisableInterrupts( a, b ) \ | |
627 | usc_OutReg( (a), ICR, (u16)((usc_InReg((a),ICR) & 0xff00) + 0x80 + (b)) ) | |
628 | ||
629 | #define usc_EnableMasterIrqBit(a) \ | |
630 | usc_OutReg( (a), ICR, (u16)((usc_InReg((a),ICR) & 0x0f00) + 0xb000) ) | |
631 | ||
632 | #define usc_DisableMasterIrqBit(a) \ | |
633 | usc_OutReg( (a), ICR, (u16)(usc_InReg((a),ICR) & 0x7f00) ) | |
634 | ||
635 | #define usc_ClearIrqPendingBits( a, b ) usc_OutReg( (a), DCCR, 0x40 + (b) ) | |
636 | ||
637 | /* | |
638 | * Transmit status Bits in Transmit Control status Register (TCSR) | |
639 | * and Transmit Interrupt Control Register (TICR) (except BIT2, BIT0) | |
640 | */ | |
641 | ||
642 | #define TXSTATUS_PREAMBLE_SENT BIT7 | |
643 | #define TXSTATUS_IDLE_SENT BIT6 | |
644 | #define TXSTATUS_ABORT_SENT BIT5 | |
645 | #define TXSTATUS_EOF BIT4 | |
646 | #define TXSTATUS_CRC_SENT BIT3 | |
647 | #define TXSTATUS_ALL_SENT BIT2 | |
648 | #define TXSTATUS_UNDERRUN BIT1 | |
649 | #define TXSTATUS_FIFO_EMPTY BIT0 | |
650 | ||
651 | #define DICR_MASTER BIT15 | |
652 | #define DICR_TRANSMIT BIT0 | |
653 | #define DICR_RECEIVE BIT1 | |
654 | ||
655 | #define usc_EnableDmaInterrupts(a,b) \ | |
656 | usc_OutDmaReg( (a), DICR, (u16)(usc_InDmaReg((a),DICR) | (b)) ) | |
657 | ||
658 | #define usc_DisableDmaInterrupts(a,b) \ | |
659 | usc_OutDmaReg( (a), DICR, (u16)(usc_InDmaReg((a),DICR) & ~(b)) ) | |
660 | ||
661 | #define usc_EnableStatusIrqs(a,b) \ | |
662 | usc_OutReg( (a), SICR, (u16)(usc_InReg((a),SICR) | (b)) ) | |
663 | ||
664 | #define usc_DisablestatusIrqs(a,b) \ | |
665 | usc_OutReg( (a), SICR, (u16)(usc_InReg((a),SICR) & ~(b)) ) | |
666 | ||
667 | /* Transmit status Bits in Transmit Control status Register (TCSR) */ | |
668 | /* and Transmit Interrupt Control Register (TICR) (except BIT2, BIT0) */ | |
669 | ||
670 | ||
671 | #define DISABLE_UNCONDITIONAL 0 | |
672 | #define DISABLE_END_OF_FRAME 1 | |
673 | #define ENABLE_UNCONDITIONAL 2 | |
674 | #define ENABLE_AUTO_CTS 3 | |
675 | #define ENABLE_AUTO_DCD 3 | |
676 | #define usc_EnableTransmitter(a,b) \ | |
677 | usc_OutReg( (a), TMR, (u16)((usc_InReg((a),TMR) & 0xfffc) | (b)) ) | |
678 | #define usc_EnableReceiver(a,b) \ | |
679 | usc_OutReg( (a), RMR, (u16)((usc_InReg((a),RMR) & 0xfffc) | (b)) ) | |
680 | ||
681 | static u16 usc_InDmaReg( struct mgsl_struct *info, u16 Port ); | |
682 | static void usc_OutDmaReg( struct mgsl_struct *info, u16 Port, u16 Value ); | |
683 | static void usc_DmaCmd( struct mgsl_struct *info, u16 Cmd ); | |
684 | ||
685 | static u16 usc_InReg( struct mgsl_struct *info, u16 Port ); | |
686 | static void usc_OutReg( struct mgsl_struct *info, u16 Port, u16 Value ); | |
687 | static void usc_RTCmd( struct mgsl_struct *info, u16 Cmd ); | |
688 | void usc_RCmd( struct mgsl_struct *info, u16 Cmd ); | |
689 | void usc_TCmd( struct mgsl_struct *info, u16 Cmd ); | |
690 | ||
691 | #define usc_TCmd(a,b) usc_OutReg((a), TCSR, (u16)((a)->tcsr_value + (b))) | |
692 | #define usc_RCmd(a,b) usc_OutReg((a), RCSR, (b)) | |
693 | ||
694 | #define usc_SetTransmitSyncChars(a,s0,s1) usc_OutReg((a), TSR, (u16)(((u16)s0<<8)|(u16)s1)) | |
695 | ||
696 | static void usc_process_rxoverrun_sync( struct mgsl_struct *info ); | |
697 | static void usc_start_receiver( struct mgsl_struct *info ); | |
698 | static void usc_stop_receiver( struct mgsl_struct *info ); | |
699 | ||
700 | static void usc_start_transmitter( struct mgsl_struct *info ); | |
701 | static void usc_stop_transmitter( struct mgsl_struct *info ); | |
702 | static void usc_set_txidle( struct mgsl_struct *info ); | |
703 | static void usc_load_txfifo( struct mgsl_struct *info ); | |
704 | ||
705 | static void usc_enable_aux_clock( struct mgsl_struct *info, u32 DataRate ); | |
706 | static void usc_enable_loopback( struct mgsl_struct *info, int enable ); | |
707 | ||
708 | static void usc_get_serial_signals( struct mgsl_struct *info ); | |
709 | static void usc_set_serial_signals( struct mgsl_struct *info ); | |
710 | ||
711 | static void usc_reset( struct mgsl_struct *info ); | |
712 | ||
713 | static void usc_set_sync_mode( struct mgsl_struct *info ); | |
714 | static void usc_set_sdlc_mode( struct mgsl_struct *info ); | |
715 | static void usc_set_async_mode( struct mgsl_struct *info ); | |
716 | static void usc_enable_async_clock( struct mgsl_struct *info, u32 DataRate ); | |
717 | ||
718 | static void usc_loopback_frame( struct mgsl_struct *info ); | |
719 | ||
720 | static void mgsl_tx_timeout(unsigned long context); | |
721 | ||
722 | ||
723 | static void usc_loopmode_cancel_transmit( struct mgsl_struct * info ); | |
724 | static void usc_loopmode_insert_request( struct mgsl_struct * info ); | |
725 | static int usc_loopmode_active( struct mgsl_struct * info); | |
726 | static void usc_loopmode_send_done( struct mgsl_struct * info ); | |
727 | ||
728 | static int mgsl_ioctl_common(struct mgsl_struct *info, unsigned int cmd, unsigned long arg); | |
729 | ||
730 | #ifdef CONFIG_HDLC | |
731 | #define dev_to_port(D) (dev_to_hdlc(D)->priv) | |
732 | static void hdlcdev_tx_done(struct mgsl_struct *info); | |
733 | static void hdlcdev_rx(struct mgsl_struct *info, char *buf, int size); | |
734 | static int hdlcdev_init(struct mgsl_struct *info); | |
735 | static void hdlcdev_exit(struct mgsl_struct *info); | |
736 | #endif | |
737 | ||
738 | /* | |
739 | * Defines a BUS descriptor value for the PCI adapter | |
740 | * local bus address ranges. | |
741 | */ | |
742 | ||
743 | #define BUS_DESCRIPTOR( WrHold, WrDly, RdDly, Nwdd, Nwad, Nxda, Nrdd, Nrad ) \ | |
744 | (0x00400020 + \ | |
745 | ((WrHold) << 30) + \ | |
746 | ((WrDly) << 28) + \ | |
747 | ((RdDly) << 26) + \ | |
748 | ((Nwdd) << 20) + \ | |
749 | ((Nwad) << 15) + \ | |
750 | ((Nxda) << 13) + \ | |
751 | ((Nrdd) << 11) + \ | |
752 | ((Nrad) << 6) ) | |
753 | ||
754 | static void mgsl_trace_block(struct mgsl_struct *info,const char* data, int count, int xmit); | |
755 | ||
756 | /* | |
757 | * Adapter diagnostic routines | |
758 | */ | |
759 | static BOOLEAN mgsl_register_test( struct mgsl_struct *info ); | |
760 | static BOOLEAN mgsl_irq_test( struct mgsl_struct *info ); | |
761 | static BOOLEAN mgsl_dma_test( struct mgsl_struct *info ); | |
762 | static BOOLEAN mgsl_memory_test( struct mgsl_struct *info ); | |
763 | static int mgsl_adapter_test( struct mgsl_struct *info ); | |
764 | ||
765 | /* | |
766 | * device and resource management routines | |
767 | */ | |
768 | static int mgsl_claim_resources(struct mgsl_struct *info); | |
769 | static void mgsl_release_resources(struct mgsl_struct *info); | |
770 | static void mgsl_add_device(struct mgsl_struct *info); | |
771 | static struct mgsl_struct* mgsl_allocate_device(void); | |
772 | ||
773 | /* | |
774 | * DMA buffer manupulation functions. | |
775 | */ | |
776 | static void mgsl_free_rx_frame_buffers( struct mgsl_struct *info, unsigned int StartIndex, unsigned int EndIndex ); | |
777 | static int mgsl_get_rx_frame( struct mgsl_struct *info ); | |
778 | static int mgsl_get_raw_rx_frame( struct mgsl_struct *info ); | |
779 | static void mgsl_reset_rx_dma_buffers( struct mgsl_struct *info ); | |
780 | static void mgsl_reset_tx_dma_buffers( struct mgsl_struct *info ); | |
781 | static int num_free_tx_dma_buffers(struct mgsl_struct *info); | |
782 | static void mgsl_load_tx_dma_buffer( struct mgsl_struct *info, const char *Buffer, unsigned int BufferSize); | |
783 | static void mgsl_load_pci_memory(char* TargetPtr, const char* SourcePtr, unsigned short count); | |
784 | ||
785 | /* | |
786 | * DMA and Shared Memory buffer allocation and formatting | |
787 | */ | |
788 | static int mgsl_allocate_dma_buffers(struct mgsl_struct *info); | |
789 | static void mgsl_free_dma_buffers(struct mgsl_struct *info); | |
790 | static int mgsl_alloc_frame_memory(struct mgsl_struct *info, DMABUFFERENTRY *BufferList,int Buffercount); | |
791 | static void mgsl_free_frame_memory(struct mgsl_struct *info, DMABUFFERENTRY *BufferList,int Buffercount); | |
792 | static int mgsl_alloc_buffer_list_memory(struct mgsl_struct *info); | |
793 | static void mgsl_free_buffer_list_memory(struct mgsl_struct *info); | |
794 | static int mgsl_alloc_intermediate_rxbuffer_memory(struct mgsl_struct *info); | |
795 | static void mgsl_free_intermediate_rxbuffer_memory(struct mgsl_struct *info); | |
796 | static int mgsl_alloc_intermediate_txbuffer_memory(struct mgsl_struct *info); | |
797 | static void mgsl_free_intermediate_txbuffer_memory(struct mgsl_struct *info); | |
798 | static int load_next_tx_holding_buffer(struct mgsl_struct *info); | |
799 | static int save_tx_buffer_request(struct mgsl_struct *info,const char *Buffer, unsigned int BufferSize); | |
800 | ||
801 | /* | |
802 | * Bottom half interrupt handlers | |
803 | */ | |
804 | static void mgsl_bh_handler(void* Context); | |
805 | static void mgsl_bh_receive(struct mgsl_struct *info); | |
806 | static void mgsl_bh_transmit(struct mgsl_struct *info); | |
807 | static void mgsl_bh_status(struct mgsl_struct *info); | |
808 | ||
809 | /* | |
810 | * Interrupt handler routines and dispatch table. | |
811 | */ | |
812 | static void mgsl_isr_null( struct mgsl_struct *info ); | |
813 | static void mgsl_isr_transmit_data( struct mgsl_struct *info ); | |
814 | static void mgsl_isr_receive_data( struct mgsl_struct *info ); | |
815 | static void mgsl_isr_receive_status( struct mgsl_struct *info ); | |
816 | static void mgsl_isr_transmit_status( struct mgsl_struct *info ); | |
817 | static void mgsl_isr_io_pin( struct mgsl_struct *info ); | |
818 | static void mgsl_isr_misc( struct mgsl_struct *info ); | |
819 | static void mgsl_isr_receive_dma( struct mgsl_struct *info ); | |
820 | static void mgsl_isr_transmit_dma( struct mgsl_struct *info ); | |
821 | ||
822 | typedef void (*isr_dispatch_func)(struct mgsl_struct *); | |
823 | ||
824 | static isr_dispatch_func UscIsrTable[7] = | |
825 | { | |
826 | mgsl_isr_null, | |
827 | mgsl_isr_misc, | |
828 | mgsl_isr_io_pin, | |
829 | mgsl_isr_transmit_data, | |
830 | mgsl_isr_transmit_status, | |
831 | mgsl_isr_receive_data, | |
832 | mgsl_isr_receive_status | |
833 | }; | |
834 | ||
835 | /* | |
836 | * ioctl call handlers | |
837 | */ | |
838 | static int tiocmget(struct tty_struct *tty, struct file *file); | |
839 | static int tiocmset(struct tty_struct *tty, struct file *file, | |
840 | unsigned int set, unsigned int clear); | |
841 | static int mgsl_get_stats(struct mgsl_struct * info, struct mgsl_icount | |
842 | __user *user_icount); | |
843 | static int mgsl_get_params(struct mgsl_struct * info, MGSL_PARAMS __user *user_params); | |
844 | static int mgsl_set_params(struct mgsl_struct * info, MGSL_PARAMS __user *new_params); | |
845 | static int mgsl_get_txidle(struct mgsl_struct * info, int __user *idle_mode); | |
846 | static int mgsl_set_txidle(struct mgsl_struct * info, int idle_mode); | |
847 | static int mgsl_txenable(struct mgsl_struct * info, int enable); | |
848 | static int mgsl_txabort(struct mgsl_struct * info); | |
849 | static int mgsl_rxenable(struct mgsl_struct * info, int enable); | |
850 | static int mgsl_wait_event(struct mgsl_struct * info, int __user *mask); | |
851 | static int mgsl_loopmode_send_done( struct mgsl_struct * info ); | |
852 | ||
853 | /* set non-zero on successful registration with PCI subsystem */ | |
854 | static int pci_registered; | |
855 | ||
856 | /* | |
857 | * Global linked list of SyncLink devices | |
858 | */ | |
859 | static struct mgsl_struct *mgsl_device_list; | |
860 | static int mgsl_device_count; | |
861 | ||
862 | /* | |
863 | * Set this param to non-zero to load eax with the | |
864 | * .text section address and breakpoint on module load. | |
865 | * This is useful for use with gdb and add-symbol-file command. | |
866 | */ | |
867 | static int break_on_load; | |
868 | ||
869 | /* | |
870 | * Driver major number, defaults to zero to get auto | |
871 | * assigned major number. May be forced as module parameter. | |
872 | */ | |
873 | static int ttymajor; | |
874 | ||
875 | /* | |
876 | * Array of user specified options for ISA adapters. | |
877 | */ | |
878 | static int io[MAX_ISA_DEVICES]; | |
879 | static int irq[MAX_ISA_DEVICES]; | |
880 | static int dma[MAX_ISA_DEVICES]; | |
881 | static int debug_level; | |
882 | static int maxframe[MAX_TOTAL_DEVICES]; | |
883 | static int dosyncppp[MAX_TOTAL_DEVICES]; | |
884 | static int txdmabufs[MAX_TOTAL_DEVICES]; | |
885 | static int txholdbufs[MAX_TOTAL_DEVICES]; | |
886 | ||
887 | module_param(break_on_load, bool, 0); | |
888 | module_param(ttymajor, int, 0); | |
889 | module_param_array(io, int, NULL, 0); | |
890 | module_param_array(irq, int, NULL, 0); | |
891 | module_param_array(dma, int, NULL, 0); | |
892 | module_param(debug_level, int, 0); | |
893 | module_param_array(maxframe, int, NULL, 0); | |
894 | module_param_array(dosyncppp, int, NULL, 0); | |
895 | module_param_array(txdmabufs, int, NULL, 0); | |
896 | module_param_array(txholdbufs, int, NULL, 0); | |
897 | ||
898 | static char *driver_name = "SyncLink serial driver"; | |
4a918bc2 | 899 | static char *driver_version = "$Revision: 4.37 $"; |
1da177e4 LT |
900 | |
901 | static int synclink_init_one (struct pci_dev *dev, | |
902 | const struct pci_device_id *ent); | |
903 | static void synclink_remove_one (struct pci_dev *dev); | |
904 | ||
905 | static struct pci_device_id synclink_pci_tbl[] = { | |
906 | { PCI_VENDOR_ID_MICROGATE, PCI_DEVICE_ID_MICROGATE_USC, PCI_ANY_ID, PCI_ANY_ID, }, | |
907 | { PCI_VENDOR_ID_MICROGATE, 0x0210, PCI_ANY_ID, PCI_ANY_ID, }, | |
908 | { 0, }, /* terminate list */ | |
909 | }; | |
910 | MODULE_DEVICE_TABLE(pci, synclink_pci_tbl); | |
911 | ||
912 | MODULE_LICENSE("GPL"); | |
913 | ||
914 | static struct pci_driver synclink_pci_driver = { | |
915 | .name = "synclink", | |
916 | .id_table = synclink_pci_tbl, | |
917 | .probe = synclink_init_one, | |
918 | .remove = __devexit_p(synclink_remove_one), | |
919 | }; | |
920 | ||
921 | static struct tty_driver *serial_driver; | |
922 | ||
923 | /* number of characters left in xmit buffer before we ask for more */ | |
924 | #define WAKEUP_CHARS 256 | |
925 | ||
926 | ||
927 | static void mgsl_change_params(struct mgsl_struct *info); | |
928 | static void mgsl_wait_until_sent(struct tty_struct *tty, int timeout); | |
929 | ||
930 | /* | |
931 | * 1st function defined in .text section. Calling this function in | |
932 | * init_module() followed by a breakpoint allows a remote debugger | |
933 | * (gdb) to get the .text address for the add-symbol-file command. | |
934 | * This allows remote debugging of dynamically loadable modules. | |
935 | */ | |
936 | static void* mgsl_get_text_ptr(void) | |
937 | { | |
938 | return mgsl_get_text_ptr; | |
939 | } | |
940 | ||
941 | /* | |
942 | * tmp_buf is used as a temporary buffer by mgsl_write. We need to | |
943 | * lock it in case the COPY_FROM_USER blocks while swapping in a page, | |
944 | * and some other program tries to do a serial write at the same time. | |
945 | * Since the lock will only come under contention when the system is | |
946 | * swapping and available memory is low, it makes sense to share one | |
947 | * buffer across all the serial ioports, since it significantly saves | |
948 | * memory if large numbers of serial ports are open. | |
949 | */ | |
950 | static unsigned char *tmp_buf; | |
951 | static DECLARE_MUTEX(tmp_buf_sem); | |
952 | ||
953 | static inline int mgsl_paranoia_check(struct mgsl_struct *info, | |
954 | char *name, const char *routine) | |
955 | { | |
956 | #ifdef MGSL_PARANOIA_CHECK | |
957 | static const char *badmagic = | |
958 | "Warning: bad magic number for mgsl struct (%s) in %s\n"; | |
959 | static const char *badinfo = | |
960 | "Warning: null mgsl_struct for (%s) in %s\n"; | |
961 | ||
962 | if (!info) { | |
963 | printk(badinfo, name, routine); | |
964 | return 1; | |
965 | } | |
966 | if (info->magic != MGSL_MAGIC) { | |
967 | printk(badmagic, name, routine); | |
968 | return 1; | |
969 | } | |
970 | #else | |
971 | if (!info) | |
972 | return 1; | |
973 | #endif | |
974 | return 0; | |
975 | } | |
976 | ||
977 | /** | |
978 | * line discipline callback wrappers | |
979 | * | |
980 | * The wrappers maintain line discipline references | |
981 | * while calling into the line discipline. | |
982 | * | |
983 | * ldisc_receive_buf - pass receive data to line discipline | |
984 | */ | |
985 | ||
986 | static void ldisc_receive_buf(struct tty_struct *tty, | |
987 | const __u8 *data, char *flags, int count) | |
988 | { | |
989 | struct tty_ldisc *ld; | |
990 | if (!tty) | |
991 | return; | |
992 | ld = tty_ldisc_ref(tty); | |
993 | if (ld) { | |
994 | if (ld->receive_buf) | |
995 | ld->receive_buf(tty, data, flags, count); | |
996 | tty_ldisc_deref(ld); | |
997 | } | |
998 | } | |
999 | ||
1000 | /* mgsl_stop() throttle (stop) transmitter | |
1001 | * | |
1002 | * Arguments: tty pointer to tty info structure | |
1003 | * Return Value: None | |
1004 | */ | |
1005 | static void mgsl_stop(struct tty_struct *tty) | |
1006 | { | |
1007 | struct mgsl_struct *info = (struct mgsl_struct *)tty->driver_data; | |
1008 | unsigned long flags; | |
1009 | ||
1010 | if (mgsl_paranoia_check(info, tty->name, "mgsl_stop")) | |
1011 | return; | |
1012 | ||
1013 | if ( debug_level >= DEBUG_LEVEL_INFO ) | |
1014 | printk("mgsl_stop(%s)\n",info->device_name); | |
1015 | ||
1016 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
1017 | if (info->tx_enabled) | |
1018 | usc_stop_transmitter(info); | |
1019 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
1020 | ||
1021 | } /* end of mgsl_stop() */ | |
1022 | ||
1023 | /* mgsl_start() release (start) transmitter | |
1024 | * | |
1025 | * Arguments: tty pointer to tty info structure | |
1026 | * Return Value: None | |
1027 | */ | |
1028 | static void mgsl_start(struct tty_struct *tty) | |
1029 | { | |
1030 | struct mgsl_struct *info = (struct mgsl_struct *)tty->driver_data; | |
1031 | unsigned long flags; | |
1032 | ||
1033 | if (mgsl_paranoia_check(info, tty->name, "mgsl_start")) | |
1034 | return; | |
1035 | ||
1036 | if ( debug_level >= DEBUG_LEVEL_INFO ) | |
1037 | printk("mgsl_start(%s)\n",info->device_name); | |
1038 | ||
1039 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
1040 | if (!info->tx_enabled) | |
1041 | usc_start_transmitter(info); | |
1042 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
1043 | ||
1044 | } /* end of mgsl_start() */ | |
1045 | ||
1046 | /* | |
1047 | * Bottom half work queue access functions | |
1048 | */ | |
1049 | ||
1050 | /* mgsl_bh_action() Return next bottom half action to perform. | |
1051 | * Return Value: BH action code or 0 if nothing to do. | |
1052 | */ | |
1053 | static int mgsl_bh_action(struct mgsl_struct *info) | |
1054 | { | |
1055 | unsigned long flags; | |
1056 | int rc = 0; | |
1057 | ||
1058 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
1059 | ||
1060 | if (info->pending_bh & BH_RECEIVE) { | |
1061 | info->pending_bh &= ~BH_RECEIVE; | |
1062 | rc = BH_RECEIVE; | |
1063 | } else if (info->pending_bh & BH_TRANSMIT) { | |
1064 | info->pending_bh &= ~BH_TRANSMIT; | |
1065 | rc = BH_TRANSMIT; | |
1066 | } else if (info->pending_bh & BH_STATUS) { | |
1067 | info->pending_bh &= ~BH_STATUS; | |
1068 | rc = BH_STATUS; | |
1069 | } | |
1070 | ||
1071 | if (!rc) { | |
1072 | /* Mark BH routine as complete */ | |
1073 | info->bh_running = 0; | |
1074 | info->bh_requested = 0; | |
1075 | } | |
1076 | ||
1077 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
1078 | ||
1079 | return rc; | |
1080 | } | |
1081 | ||
1082 | /* | |
1083 | * Perform bottom half processing of work items queued by ISR. | |
1084 | */ | |
1085 | static void mgsl_bh_handler(void* Context) | |
1086 | { | |
1087 | struct mgsl_struct *info = (struct mgsl_struct*)Context; | |
1088 | int action; | |
1089 | ||
1090 | if (!info) | |
1091 | return; | |
1092 | ||
1093 | if ( debug_level >= DEBUG_LEVEL_BH ) | |
1094 | printk( "%s(%d):mgsl_bh_handler(%s) entry\n", | |
1095 | __FILE__,__LINE__,info->device_name); | |
1096 | ||
1097 | info->bh_running = 1; | |
1098 | ||
1099 | while((action = mgsl_bh_action(info)) != 0) { | |
1100 | ||
1101 | /* Process work item */ | |
1102 | if ( debug_level >= DEBUG_LEVEL_BH ) | |
1103 | printk( "%s(%d):mgsl_bh_handler() work item action=%d\n", | |
1104 | __FILE__,__LINE__,action); | |
1105 | ||
1106 | switch (action) { | |
1107 | ||
1108 | case BH_RECEIVE: | |
1109 | mgsl_bh_receive(info); | |
1110 | break; | |
1111 | case BH_TRANSMIT: | |
1112 | mgsl_bh_transmit(info); | |
1113 | break; | |
1114 | case BH_STATUS: | |
1115 | mgsl_bh_status(info); | |
1116 | break; | |
1117 | default: | |
1118 | /* unknown work item ID */ | |
1119 | printk("Unknown work item ID=%08X!\n", action); | |
1120 | break; | |
1121 | } | |
1122 | } | |
1123 | ||
1124 | if ( debug_level >= DEBUG_LEVEL_BH ) | |
1125 | printk( "%s(%d):mgsl_bh_handler(%s) exit\n", | |
1126 | __FILE__,__LINE__,info->device_name); | |
1127 | } | |
1128 | ||
1129 | static void mgsl_bh_receive(struct mgsl_struct *info) | |
1130 | { | |
1131 | int (*get_rx_frame)(struct mgsl_struct *info) = | |
1132 | (info->params.mode == MGSL_MODE_HDLC ? mgsl_get_rx_frame : mgsl_get_raw_rx_frame); | |
1133 | ||
1134 | if ( debug_level >= DEBUG_LEVEL_BH ) | |
1135 | printk( "%s(%d):mgsl_bh_receive(%s)\n", | |
1136 | __FILE__,__LINE__,info->device_name); | |
1137 | ||
1138 | do | |
1139 | { | |
1140 | if (info->rx_rcc_underrun) { | |
1141 | unsigned long flags; | |
1142 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
1143 | usc_start_receiver(info); | |
1144 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
1145 | return; | |
1146 | } | |
1147 | } while(get_rx_frame(info)); | |
1148 | } | |
1149 | ||
1150 | static void mgsl_bh_transmit(struct mgsl_struct *info) | |
1151 | { | |
1152 | struct tty_struct *tty = info->tty; | |
1153 | unsigned long flags; | |
1154 | ||
1155 | if ( debug_level >= DEBUG_LEVEL_BH ) | |
1156 | printk( "%s(%d):mgsl_bh_transmit() entry on %s\n", | |
1157 | __FILE__,__LINE__,info->device_name); | |
1158 | ||
1159 | if (tty) { | |
1160 | tty_wakeup(tty); | |
1161 | wake_up_interruptible(&tty->write_wait); | |
1162 | } | |
1163 | ||
1164 | /* if transmitter idle and loopmode_send_done_requested | |
1165 | * then start echoing RxD to TxD | |
1166 | */ | |
1167 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
1168 | if ( !info->tx_active && info->loopmode_send_done_requested ) | |
1169 | usc_loopmode_send_done( info ); | |
1170 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
1171 | } | |
1172 | ||
1173 | static void mgsl_bh_status(struct mgsl_struct *info) | |
1174 | { | |
1175 | if ( debug_level >= DEBUG_LEVEL_BH ) | |
1176 | printk( "%s(%d):mgsl_bh_status() entry on %s\n", | |
1177 | __FILE__,__LINE__,info->device_name); | |
1178 | ||
1179 | info->ri_chkcount = 0; | |
1180 | info->dsr_chkcount = 0; | |
1181 | info->dcd_chkcount = 0; | |
1182 | info->cts_chkcount = 0; | |
1183 | } | |
1184 | ||
1185 | /* mgsl_isr_receive_status() | |
1186 | * | |
1187 | * Service a receive status interrupt. The type of status | |
1188 | * interrupt is indicated by the state of the RCSR. | |
1189 | * This is only used for HDLC mode. | |
1190 | * | |
1191 | * Arguments: info pointer to device instance data | |
1192 | * Return Value: None | |
1193 | */ | |
1194 | static void mgsl_isr_receive_status( struct mgsl_struct *info ) | |
1195 | { | |
1196 | u16 status = usc_InReg( info, RCSR ); | |
1197 | ||
1198 | if ( debug_level >= DEBUG_LEVEL_ISR ) | |
1199 | printk("%s(%d):mgsl_isr_receive_status status=%04X\n", | |
1200 | __FILE__,__LINE__,status); | |
1201 | ||
1202 | if ( (status & RXSTATUS_ABORT_RECEIVED) && | |
1203 | info->loopmode_insert_requested && | |
1204 | usc_loopmode_active(info) ) | |
1205 | { | |
1206 | ++info->icount.rxabort; | |
1207 | info->loopmode_insert_requested = FALSE; | |
1208 | ||
1209 | /* clear CMR:13 to start echoing RxD to TxD */ | |
1210 | info->cmr_value &= ~BIT13; | |
1211 | usc_OutReg(info, CMR, info->cmr_value); | |
1212 | ||
1213 | /* disable received abort irq (no longer required) */ | |
1214 | usc_OutReg(info, RICR, | |
1215 | (usc_InReg(info, RICR) & ~RXSTATUS_ABORT_RECEIVED)); | |
1216 | } | |
1217 | ||
1218 | if (status & (RXSTATUS_EXITED_HUNT + RXSTATUS_IDLE_RECEIVED)) { | |
1219 | if (status & RXSTATUS_EXITED_HUNT) | |
1220 | info->icount.exithunt++; | |
1221 | if (status & RXSTATUS_IDLE_RECEIVED) | |
1222 | info->icount.rxidle++; | |
1223 | wake_up_interruptible(&info->event_wait_q); | |
1224 | } | |
1225 | ||
1226 | if (status & RXSTATUS_OVERRUN){ | |
1227 | info->icount.rxover++; | |
1228 | usc_process_rxoverrun_sync( info ); | |
1229 | } | |
1230 | ||
1231 | usc_ClearIrqPendingBits( info, RECEIVE_STATUS ); | |
1232 | usc_UnlatchRxstatusBits( info, status ); | |
1233 | ||
1234 | } /* end of mgsl_isr_receive_status() */ | |
1235 | ||
1236 | /* mgsl_isr_transmit_status() | |
1237 | * | |
1238 | * Service a transmit status interrupt | |
1239 | * HDLC mode :end of transmit frame | |
1240 | * Async mode:all data is sent | |
1241 | * transmit status is indicated by bits in the TCSR. | |
1242 | * | |
1243 | * Arguments: info pointer to device instance data | |
1244 | * Return Value: None | |
1245 | */ | |
1246 | static void mgsl_isr_transmit_status( struct mgsl_struct *info ) | |
1247 | { | |
1248 | u16 status = usc_InReg( info, TCSR ); | |
1249 | ||
1250 | if ( debug_level >= DEBUG_LEVEL_ISR ) | |
1251 | printk("%s(%d):mgsl_isr_transmit_status status=%04X\n", | |
1252 | __FILE__,__LINE__,status); | |
1253 | ||
1254 | usc_ClearIrqPendingBits( info, TRANSMIT_STATUS ); | |
1255 | usc_UnlatchTxstatusBits( info, status ); | |
1256 | ||
1257 | if ( status & (TXSTATUS_UNDERRUN | TXSTATUS_ABORT_SENT) ) | |
1258 | { | |
1259 | /* finished sending HDLC abort. This may leave */ | |
1260 | /* the TxFifo with data from the aborted frame */ | |
1261 | /* so purge the TxFifo. Also shutdown the DMA */ | |
1262 | /* channel in case there is data remaining in */ | |
1263 | /* the DMA buffer */ | |
1264 | usc_DmaCmd( info, DmaCmd_ResetTxChannel ); | |
1265 | usc_RTCmd( info, RTCmd_PurgeTxFifo ); | |
1266 | } | |
1267 | ||
1268 | if ( status & TXSTATUS_EOF_SENT ) | |
1269 | info->icount.txok++; | |
1270 | else if ( status & TXSTATUS_UNDERRUN ) | |
1271 | info->icount.txunder++; | |
1272 | else if ( status & TXSTATUS_ABORT_SENT ) | |
1273 | info->icount.txabort++; | |
1274 | else | |
1275 | info->icount.txunder++; | |
1276 | ||
1277 | info->tx_active = 0; | |
1278 | info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; | |
1279 | del_timer(&info->tx_timer); | |
1280 | ||
1281 | if ( info->drop_rts_on_tx_done ) { | |
1282 | usc_get_serial_signals( info ); | |
1283 | if ( info->serial_signals & SerialSignal_RTS ) { | |
1284 | info->serial_signals &= ~SerialSignal_RTS; | |
1285 | usc_set_serial_signals( info ); | |
1286 | } | |
1287 | info->drop_rts_on_tx_done = 0; | |
1288 | } | |
1289 | ||
1290 | #ifdef CONFIG_HDLC | |
1291 | if (info->netcount) | |
1292 | hdlcdev_tx_done(info); | |
1293 | else | |
1294 | #endif | |
1295 | { | |
1296 | if (info->tty->stopped || info->tty->hw_stopped) { | |
1297 | usc_stop_transmitter(info); | |
1298 | return; | |
1299 | } | |
1300 | info->pending_bh |= BH_TRANSMIT; | |
1301 | } | |
1302 | ||
1303 | } /* end of mgsl_isr_transmit_status() */ | |
1304 | ||
1305 | /* mgsl_isr_io_pin() | |
1306 | * | |
1307 | * Service an Input/Output pin interrupt. The type of | |
1308 | * interrupt is indicated by bits in the MISR | |
1309 | * | |
1310 | * Arguments: info pointer to device instance data | |
1311 | * Return Value: None | |
1312 | */ | |
1313 | static void mgsl_isr_io_pin( struct mgsl_struct *info ) | |
1314 | { | |
1315 | struct mgsl_icount *icount; | |
1316 | u16 status = usc_InReg( info, MISR ); | |
1317 | ||
1318 | if ( debug_level >= DEBUG_LEVEL_ISR ) | |
1319 | printk("%s(%d):mgsl_isr_io_pin status=%04X\n", | |
1320 | __FILE__,__LINE__,status); | |
1321 | ||
1322 | usc_ClearIrqPendingBits( info, IO_PIN ); | |
1323 | usc_UnlatchIostatusBits( info, status ); | |
1324 | ||
1325 | if (status & (MISCSTATUS_CTS_LATCHED | MISCSTATUS_DCD_LATCHED | | |
1326 | MISCSTATUS_DSR_LATCHED | MISCSTATUS_RI_LATCHED) ) { | |
1327 | icount = &info->icount; | |
1328 | /* update input line counters */ | |
1329 | if (status & MISCSTATUS_RI_LATCHED) { | |
1330 | if ((info->ri_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) | |
1331 | usc_DisablestatusIrqs(info,SICR_RI); | |
1332 | icount->rng++; | |
1333 | if ( status & MISCSTATUS_RI ) | |
1334 | info->input_signal_events.ri_up++; | |
1335 | else | |
1336 | info->input_signal_events.ri_down++; | |
1337 | } | |
1338 | if (status & MISCSTATUS_DSR_LATCHED) { | |
1339 | if ((info->dsr_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) | |
1340 | usc_DisablestatusIrqs(info,SICR_DSR); | |
1341 | icount->dsr++; | |
1342 | if ( status & MISCSTATUS_DSR ) | |
1343 | info->input_signal_events.dsr_up++; | |
1344 | else | |
1345 | info->input_signal_events.dsr_down++; | |
1346 | } | |
1347 | if (status & MISCSTATUS_DCD_LATCHED) { | |
1348 | if ((info->dcd_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) | |
1349 | usc_DisablestatusIrqs(info,SICR_DCD); | |
1350 | icount->dcd++; | |
1351 | if (status & MISCSTATUS_DCD) { | |
1352 | info->input_signal_events.dcd_up++; | |
1353 | } else | |
1354 | info->input_signal_events.dcd_down++; | |
1355 | #ifdef CONFIG_HDLC | |
1356 | if (info->netcount) | |
1357 | hdlc_set_carrier(status & MISCSTATUS_DCD, info->netdev); | |
1358 | #endif | |
1359 | } | |
1360 | if (status & MISCSTATUS_CTS_LATCHED) | |
1361 | { | |
1362 | if ((info->cts_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) | |
1363 | usc_DisablestatusIrqs(info,SICR_CTS); | |
1364 | icount->cts++; | |
1365 | if ( status & MISCSTATUS_CTS ) | |
1366 | info->input_signal_events.cts_up++; | |
1367 | else | |
1368 | info->input_signal_events.cts_down++; | |
1369 | } | |
1370 | wake_up_interruptible(&info->status_event_wait_q); | |
1371 | wake_up_interruptible(&info->event_wait_q); | |
1372 | ||
1373 | if ( (info->flags & ASYNC_CHECK_CD) && | |
1374 | (status & MISCSTATUS_DCD_LATCHED) ) { | |
1375 | if ( debug_level >= DEBUG_LEVEL_ISR ) | |
1376 | printk("%s CD now %s...", info->device_name, | |
1377 | (status & MISCSTATUS_DCD) ? "on" : "off"); | |
1378 | if (status & MISCSTATUS_DCD) | |
1379 | wake_up_interruptible(&info->open_wait); | |
1380 | else { | |
1381 | if ( debug_level >= DEBUG_LEVEL_ISR ) | |
1382 | printk("doing serial hangup..."); | |
1383 | if (info->tty) | |
1384 | tty_hangup(info->tty); | |
1385 | } | |
1386 | } | |
1387 | ||
1388 | if ( (info->flags & ASYNC_CTS_FLOW) && | |
1389 | (status & MISCSTATUS_CTS_LATCHED) ) { | |
1390 | if (info->tty->hw_stopped) { | |
1391 | if (status & MISCSTATUS_CTS) { | |
1392 | if ( debug_level >= DEBUG_LEVEL_ISR ) | |
1393 | printk("CTS tx start..."); | |
1394 | if (info->tty) | |
1395 | info->tty->hw_stopped = 0; | |
1396 | usc_start_transmitter(info); | |
1397 | info->pending_bh |= BH_TRANSMIT; | |
1398 | return; | |
1399 | } | |
1400 | } else { | |
1401 | if (!(status & MISCSTATUS_CTS)) { | |
1402 | if ( debug_level >= DEBUG_LEVEL_ISR ) | |
1403 | printk("CTS tx stop..."); | |
1404 | if (info->tty) | |
1405 | info->tty->hw_stopped = 1; | |
1406 | usc_stop_transmitter(info); | |
1407 | } | |
1408 | } | |
1409 | } | |
1410 | } | |
1411 | ||
1412 | info->pending_bh |= BH_STATUS; | |
1413 | ||
1414 | /* for diagnostics set IRQ flag */ | |
1415 | if ( status & MISCSTATUS_TXC_LATCHED ){ | |
1416 | usc_OutReg( info, SICR, | |
1417 | (unsigned short)(usc_InReg(info,SICR) & ~(SICR_TXC_ACTIVE+SICR_TXC_INACTIVE)) ); | |
1418 | usc_UnlatchIostatusBits( info, MISCSTATUS_TXC_LATCHED ); | |
1419 | info->irq_occurred = 1; | |
1420 | } | |
1421 | ||
1422 | } /* end of mgsl_isr_io_pin() */ | |
1423 | ||
1424 | /* mgsl_isr_transmit_data() | |
1425 | * | |
1426 | * Service a transmit data interrupt (async mode only). | |
1427 | * | |
1428 | * Arguments: info pointer to device instance data | |
1429 | * Return Value: None | |
1430 | */ | |
1431 | static void mgsl_isr_transmit_data( struct mgsl_struct *info ) | |
1432 | { | |
1433 | if ( debug_level >= DEBUG_LEVEL_ISR ) | |
1434 | printk("%s(%d):mgsl_isr_transmit_data xmit_cnt=%d\n", | |
1435 | __FILE__,__LINE__,info->xmit_cnt); | |
1436 | ||
1437 | usc_ClearIrqPendingBits( info, TRANSMIT_DATA ); | |
1438 | ||
1439 | if (info->tty->stopped || info->tty->hw_stopped) { | |
1440 | usc_stop_transmitter(info); | |
1441 | return; | |
1442 | } | |
1443 | ||
1444 | if ( info->xmit_cnt ) | |
1445 | usc_load_txfifo( info ); | |
1446 | else | |
1447 | info->tx_active = 0; | |
1448 | ||
1449 | if (info->xmit_cnt < WAKEUP_CHARS) | |
1450 | info->pending_bh |= BH_TRANSMIT; | |
1451 | ||
1452 | } /* end of mgsl_isr_transmit_data() */ | |
1453 | ||
1454 | /* mgsl_isr_receive_data() | |
1455 | * | |
1456 | * Service a receive data interrupt. This occurs | |
1457 | * when operating in asynchronous interrupt transfer mode. | |
1458 | * The receive data FIFO is flushed to the receive data buffers. | |
1459 | * | |
1460 | * Arguments: info pointer to device instance data | |
1461 | * Return Value: None | |
1462 | */ | |
1463 | static void mgsl_isr_receive_data( struct mgsl_struct *info ) | |
1464 | { | |
1465 | int Fifocount; | |
1466 | u16 status; | |
1467 | unsigned char DataByte; | |
1468 | struct tty_struct *tty = info->tty; | |
1469 | struct mgsl_icount *icount = &info->icount; | |
1470 | ||
1471 | if ( debug_level >= DEBUG_LEVEL_ISR ) | |
1472 | printk("%s(%d):mgsl_isr_receive_data\n", | |
1473 | __FILE__,__LINE__); | |
1474 | ||
1475 | usc_ClearIrqPendingBits( info, RECEIVE_DATA ); | |
1476 | ||
1477 | /* select FIFO status for RICR readback */ | |
1478 | usc_RCmd( info, RCmd_SelectRicrRxFifostatus ); | |
1479 | ||
1480 | /* clear the Wordstatus bit so that status readback */ | |
1481 | /* only reflects the status of this byte */ | |
1482 | usc_OutReg( info, RICR+LSBONLY, (u16)(usc_InReg(info, RICR+LSBONLY) & ~BIT3 )); | |
1483 | ||
1484 | /* flush the receive FIFO */ | |
1485 | ||
1486 | while( (Fifocount = (usc_InReg(info,RICR) >> 8)) ) { | |
1487 | /* read one byte from RxFIFO */ | |
1488 | outw( (inw(info->io_base + CCAR) & 0x0780) | (RDR+LSBONLY), | |
1489 | info->io_base + CCAR ); | |
1490 | DataByte = inb( info->io_base + CCAR ); | |
1491 | ||
1492 | /* get the status of the received byte */ | |
1493 | status = usc_InReg(info, RCSR); | |
1494 | if ( status & (RXSTATUS_FRAMING_ERROR + RXSTATUS_PARITY_ERROR + | |
1495 | RXSTATUS_OVERRUN + RXSTATUS_BREAK_RECEIVED) ) | |
1496 | usc_UnlatchRxstatusBits(info,RXSTATUS_ALL); | |
1497 | ||
1498 | if (tty->flip.count >= TTY_FLIPBUF_SIZE) | |
1499 | continue; | |
1500 | ||
1501 | *tty->flip.char_buf_ptr = DataByte; | |
1502 | icount->rx++; | |
1503 | ||
1504 | *tty->flip.flag_buf_ptr = 0; | |
1505 | if ( status & (RXSTATUS_FRAMING_ERROR + RXSTATUS_PARITY_ERROR + | |
1506 | RXSTATUS_OVERRUN + RXSTATUS_BREAK_RECEIVED) ) { | |
1507 | printk("rxerr=%04X\n",status); | |
1508 | /* update error statistics */ | |
1509 | if ( status & RXSTATUS_BREAK_RECEIVED ) { | |
1510 | status &= ~(RXSTATUS_FRAMING_ERROR + RXSTATUS_PARITY_ERROR); | |
1511 | icount->brk++; | |
1512 | } else if (status & RXSTATUS_PARITY_ERROR) | |
1513 | icount->parity++; | |
1514 | else if (status & RXSTATUS_FRAMING_ERROR) | |
1515 | icount->frame++; | |
1516 | else if (status & RXSTATUS_OVERRUN) { | |
1517 | /* must issue purge fifo cmd before */ | |
1518 | /* 16C32 accepts more receive chars */ | |
1519 | usc_RTCmd(info,RTCmd_PurgeRxFifo); | |
1520 | icount->overrun++; | |
1521 | } | |
1522 | ||
1523 | /* discard char if tty control flags say so */ | |
1524 | if (status & info->ignore_status_mask) | |
1525 | continue; | |
1526 | ||
1527 | status &= info->read_status_mask; | |
1528 | ||
1529 | if (status & RXSTATUS_BREAK_RECEIVED) { | |
1530 | *tty->flip.flag_buf_ptr = TTY_BREAK; | |
1531 | if (info->flags & ASYNC_SAK) | |
1532 | do_SAK(tty); | |
1533 | } else if (status & RXSTATUS_PARITY_ERROR) | |
1534 | *tty->flip.flag_buf_ptr = TTY_PARITY; | |
1535 | else if (status & RXSTATUS_FRAMING_ERROR) | |
1536 | *tty->flip.flag_buf_ptr = TTY_FRAME; | |
1537 | if (status & RXSTATUS_OVERRUN) { | |
1538 | /* Overrun is special, since it's | |
1539 | * reported immediately, and doesn't | |
1540 | * affect the current character | |
1541 | */ | |
1542 | if (tty->flip.count < TTY_FLIPBUF_SIZE) { | |
1543 | tty->flip.count++; | |
1544 | tty->flip.flag_buf_ptr++; | |
1545 | tty->flip.char_buf_ptr++; | |
1546 | *tty->flip.flag_buf_ptr = TTY_OVERRUN; | |
1547 | } | |
1548 | } | |
1549 | } /* end of if (error) */ | |
1550 | ||
1551 | tty->flip.flag_buf_ptr++; | |
1552 | tty->flip.char_buf_ptr++; | |
1553 | tty->flip.count++; | |
1554 | } | |
1555 | ||
1556 | if ( debug_level >= DEBUG_LEVEL_ISR ) { | |
1557 | printk("%s(%d):mgsl_isr_receive_data flip count=%d\n", | |
1558 | __FILE__,__LINE__,tty->flip.count); | |
1559 | printk("%s(%d):rx=%d brk=%d parity=%d frame=%d overrun=%d\n", | |
1560 | __FILE__,__LINE__,icount->rx,icount->brk, | |
1561 | icount->parity,icount->frame,icount->overrun); | |
1562 | } | |
1563 | ||
1564 | if ( tty->flip.count ) | |
1565 | tty_flip_buffer_push(tty); | |
1566 | } | |
1567 | ||
1568 | /* mgsl_isr_misc() | |
1569 | * | |
1570 | * Service a miscellaneos interrupt source. | |
1571 | * | |
1572 | * Arguments: info pointer to device extension (instance data) | |
1573 | * Return Value: None | |
1574 | */ | |
1575 | static void mgsl_isr_misc( struct mgsl_struct *info ) | |
1576 | { | |
1577 | u16 status = usc_InReg( info, MISR ); | |
1578 | ||
1579 | if ( debug_level >= DEBUG_LEVEL_ISR ) | |
1580 | printk("%s(%d):mgsl_isr_misc status=%04X\n", | |
1581 | __FILE__,__LINE__,status); | |
1582 | ||
1583 | if ((status & MISCSTATUS_RCC_UNDERRUN) && | |
1584 | (info->params.mode == MGSL_MODE_HDLC)) { | |
1585 | ||
1586 | /* turn off receiver and rx DMA */ | |
1587 | usc_EnableReceiver(info,DISABLE_UNCONDITIONAL); | |
1588 | usc_DmaCmd(info, DmaCmd_ResetRxChannel); | |
1589 | usc_UnlatchRxstatusBits(info, RXSTATUS_ALL); | |
1590 | usc_ClearIrqPendingBits(info, RECEIVE_DATA + RECEIVE_STATUS); | |
1591 | usc_DisableInterrupts(info, RECEIVE_DATA + RECEIVE_STATUS); | |
1592 | ||
1593 | /* schedule BH handler to restart receiver */ | |
1594 | info->pending_bh |= BH_RECEIVE; | |
1595 | info->rx_rcc_underrun = 1; | |
1596 | } | |
1597 | ||
1598 | usc_ClearIrqPendingBits( info, MISC ); | |
1599 | usc_UnlatchMiscstatusBits( info, status ); | |
1600 | ||
1601 | } /* end of mgsl_isr_misc() */ | |
1602 | ||
1603 | /* mgsl_isr_null() | |
1604 | * | |
1605 | * Services undefined interrupt vectors from the | |
1606 | * USC. (hence this function SHOULD never be called) | |
1607 | * | |
1608 | * Arguments: info pointer to device extension (instance data) | |
1609 | * Return Value: None | |
1610 | */ | |
1611 | static void mgsl_isr_null( struct mgsl_struct *info ) | |
1612 | { | |
1613 | ||
1614 | } /* end of mgsl_isr_null() */ | |
1615 | ||
1616 | /* mgsl_isr_receive_dma() | |
1617 | * | |
1618 | * Service a receive DMA channel interrupt. | |
1619 | * For this driver there are two sources of receive DMA interrupts | |
1620 | * as identified in the Receive DMA mode Register (RDMR): | |
1621 | * | |
1622 | * BIT3 EOA/EOL End of List, all receive buffers in receive | |
1623 | * buffer list have been filled (no more free buffers | |
1624 | * available). The DMA controller has shut down. | |
1625 | * | |
1626 | * BIT2 EOB End of Buffer. This interrupt occurs when a receive | |
1627 | * DMA buffer is terminated in response to completion | |
1628 | * of a good frame or a frame with errors. The status | |
1629 | * of the frame is stored in the buffer entry in the | |
1630 | * list of receive buffer entries. | |
1631 | * | |
1632 | * Arguments: info pointer to device instance data | |
1633 | * Return Value: None | |
1634 | */ | |
1635 | static void mgsl_isr_receive_dma( struct mgsl_struct *info ) | |
1636 | { | |
1637 | u16 status; | |
1638 | ||
1639 | /* clear interrupt pending and IUS bit for Rx DMA IRQ */ | |
1640 | usc_OutDmaReg( info, CDIR, BIT9+BIT1 ); | |
1641 | ||
1642 | /* Read the receive DMA status to identify interrupt type. */ | |
1643 | /* This also clears the status bits. */ | |
1644 | status = usc_InDmaReg( info, RDMR ); | |
1645 | ||
1646 | if ( debug_level >= DEBUG_LEVEL_ISR ) | |
1647 | printk("%s(%d):mgsl_isr_receive_dma(%s) status=%04X\n", | |
1648 | __FILE__,__LINE__,info->device_name,status); | |
1649 | ||
1650 | info->pending_bh |= BH_RECEIVE; | |
1651 | ||
1652 | if ( status & BIT3 ) { | |
1653 | info->rx_overflow = 1; | |
1654 | info->icount.buf_overrun++; | |
1655 | } | |
1656 | ||
1657 | } /* end of mgsl_isr_receive_dma() */ | |
1658 | ||
1659 | /* mgsl_isr_transmit_dma() | |
1660 | * | |
1661 | * This function services a transmit DMA channel interrupt. | |
1662 | * | |
1663 | * For this driver there is one source of transmit DMA interrupts | |
1664 | * as identified in the Transmit DMA Mode Register (TDMR): | |
1665 | * | |
1666 | * BIT2 EOB End of Buffer. This interrupt occurs when a | |
1667 | * transmit DMA buffer has been emptied. | |
1668 | * | |
1669 | * The driver maintains enough transmit DMA buffers to hold at least | |
1670 | * one max frame size transmit frame. When operating in a buffered | |
1671 | * transmit mode, there may be enough transmit DMA buffers to hold at | |
1672 | * least two or more max frame size frames. On an EOB condition, | |
1673 | * determine if there are any queued transmit buffers and copy into | |
1674 | * transmit DMA buffers if we have room. | |
1675 | * | |
1676 | * Arguments: info pointer to device instance data | |
1677 | * Return Value: None | |
1678 | */ | |
1679 | static void mgsl_isr_transmit_dma( struct mgsl_struct *info ) | |
1680 | { | |
1681 | u16 status; | |
1682 | ||
1683 | /* clear interrupt pending and IUS bit for Tx DMA IRQ */ | |
1684 | usc_OutDmaReg(info, CDIR, BIT8+BIT0 ); | |
1685 | ||
1686 | /* Read the transmit DMA status to identify interrupt type. */ | |
1687 | /* This also clears the status bits. */ | |
1688 | ||
1689 | status = usc_InDmaReg( info, TDMR ); | |
1690 | ||
1691 | if ( debug_level >= DEBUG_LEVEL_ISR ) | |
1692 | printk("%s(%d):mgsl_isr_transmit_dma(%s) status=%04X\n", | |
1693 | __FILE__,__LINE__,info->device_name,status); | |
1694 | ||
1695 | if ( status & BIT2 ) { | |
1696 | --info->tx_dma_buffers_used; | |
1697 | ||
1698 | /* if there are transmit frames queued, | |
1699 | * try to load the next one | |
1700 | */ | |
1701 | if ( load_next_tx_holding_buffer(info) ) { | |
1702 | /* if call returns non-zero value, we have | |
1703 | * at least one free tx holding buffer | |
1704 | */ | |
1705 | info->pending_bh |= BH_TRANSMIT; | |
1706 | } | |
1707 | } | |
1708 | ||
1709 | } /* end of mgsl_isr_transmit_dma() */ | |
1710 | ||
1711 | /* mgsl_interrupt() | |
1712 | * | |
1713 | * Interrupt service routine entry point. | |
1714 | * | |
1715 | * Arguments: | |
1716 | * | |
1717 | * irq interrupt number that caused interrupt | |
1718 | * dev_id device ID supplied during interrupt registration | |
1719 | * regs interrupted processor context | |
1720 | * | |
1721 | * Return Value: None | |
1722 | */ | |
1723 | static irqreturn_t mgsl_interrupt(int irq, void *dev_id, struct pt_regs * regs) | |
1724 | { | |
1725 | struct mgsl_struct * info; | |
1726 | u16 UscVector; | |
1727 | u16 DmaVector; | |
1728 | ||
1729 | if ( debug_level >= DEBUG_LEVEL_ISR ) | |
1730 | printk("%s(%d):mgsl_interrupt(%d)entry.\n", | |
1731 | __FILE__,__LINE__,irq); | |
1732 | ||
1733 | info = (struct mgsl_struct *)dev_id; | |
1734 | if (!info) | |
1735 | return IRQ_NONE; | |
1736 | ||
1737 | spin_lock(&info->irq_spinlock); | |
1738 | ||
1739 | for(;;) { | |
1740 | /* Read the interrupt vectors from hardware. */ | |
1741 | UscVector = usc_InReg(info, IVR) >> 9; | |
1742 | DmaVector = usc_InDmaReg(info, DIVR); | |
1743 | ||
1744 | if ( debug_level >= DEBUG_LEVEL_ISR ) | |
1745 | printk("%s(%d):%s UscVector=%08X DmaVector=%08X\n", | |
1746 | __FILE__,__LINE__,info->device_name,UscVector,DmaVector); | |
1747 | ||
1748 | if ( !UscVector && !DmaVector ) | |
1749 | break; | |
1750 | ||
1751 | /* Dispatch interrupt vector */ | |
1752 | if ( UscVector ) | |
1753 | (*UscIsrTable[UscVector])(info); | |
1754 | else if ( (DmaVector&(BIT10|BIT9)) == BIT10) | |
1755 | mgsl_isr_transmit_dma(info); | |
1756 | else | |
1757 | mgsl_isr_receive_dma(info); | |
1758 | ||
1759 | if ( info->isr_overflow ) { | |
1760 | printk(KERN_ERR"%s(%d):%s isr overflow irq=%d\n", | |
1761 | __FILE__,__LINE__,info->device_name, irq); | |
1762 | usc_DisableMasterIrqBit(info); | |
1763 | usc_DisableDmaInterrupts(info,DICR_MASTER); | |
1764 | break; | |
1765 | } | |
1766 | } | |
1767 | ||
1768 | /* Request bottom half processing if there's something | |
1769 | * for it to do and the bh is not already running | |
1770 | */ | |
1771 | ||
1772 | if ( info->pending_bh && !info->bh_running && !info->bh_requested ) { | |
1773 | if ( debug_level >= DEBUG_LEVEL_ISR ) | |
1774 | printk("%s(%d):%s queueing bh task.\n", | |
1775 | __FILE__,__LINE__,info->device_name); | |
1776 | schedule_work(&info->task); | |
1777 | info->bh_requested = 1; | |
1778 | } | |
1779 | ||
1780 | spin_unlock(&info->irq_spinlock); | |
1781 | ||
1782 | if ( debug_level >= DEBUG_LEVEL_ISR ) | |
1783 | printk("%s(%d):mgsl_interrupt(%d)exit.\n", | |
1784 | __FILE__,__LINE__,irq); | |
1785 | return IRQ_HANDLED; | |
1786 | } /* end of mgsl_interrupt() */ | |
1787 | ||
1788 | /* startup() | |
1789 | * | |
1790 | * Initialize and start device. | |
1791 | * | |
1792 | * Arguments: info pointer to device instance data | |
1793 | * Return Value: 0 if success, otherwise error code | |
1794 | */ | |
1795 | static int startup(struct mgsl_struct * info) | |
1796 | { | |
1797 | int retval = 0; | |
1798 | ||
1799 | if ( debug_level >= DEBUG_LEVEL_INFO ) | |
1800 | printk("%s(%d):mgsl_startup(%s)\n",__FILE__,__LINE__,info->device_name); | |
1801 | ||
1802 | if (info->flags & ASYNC_INITIALIZED) | |
1803 | return 0; | |
1804 | ||
1805 | if (!info->xmit_buf) { | |
1806 | /* allocate a page of memory for a transmit buffer */ | |
1807 | info->xmit_buf = (unsigned char *)get_zeroed_page(GFP_KERNEL); | |
1808 | if (!info->xmit_buf) { | |
1809 | printk(KERN_ERR"%s(%d):%s can't allocate transmit buffer\n", | |
1810 | __FILE__,__LINE__,info->device_name); | |
1811 | return -ENOMEM; | |
1812 | } | |
1813 | } | |
1814 | ||
1815 | info->pending_bh = 0; | |
1816 | ||
1817 | init_timer(&info->tx_timer); | |
1818 | info->tx_timer.data = (unsigned long)info; | |
1819 | info->tx_timer.function = mgsl_tx_timeout; | |
1820 | ||
1821 | /* Allocate and claim adapter resources */ | |
1822 | retval = mgsl_claim_resources(info); | |
1823 | ||
1824 | /* perform existence check and diagnostics */ | |
1825 | if ( !retval ) | |
1826 | retval = mgsl_adapter_test(info); | |
1827 | ||
1828 | if ( retval ) { | |
1829 | if (capable(CAP_SYS_ADMIN) && info->tty) | |
1830 | set_bit(TTY_IO_ERROR, &info->tty->flags); | |
1831 | mgsl_release_resources(info); | |
1832 | return retval; | |
1833 | } | |
1834 | ||
1835 | /* program hardware for current parameters */ | |
1836 | mgsl_change_params(info); | |
1837 | ||
1838 | if (info->tty) | |
1839 | clear_bit(TTY_IO_ERROR, &info->tty->flags); | |
1840 | ||
1841 | info->flags |= ASYNC_INITIALIZED; | |
1842 | ||
1843 | return 0; | |
1844 | ||
1845 | } /* end of startup() */ | |
1846 | ||
1847 | /* shutdown() | |
1848 | * | |
1849 | * Called by mgsl_close() and mgsl_hangup() to shutdown hardware | |
1850 | * | |
1851 | * Arguments: info pointer to device instance data | |
1852 | * Return Value: None | |
1853 | */ | |
1854 | static void shutdown(struct mgsl_struct * info) | |
1855 | { | |
1856 | unsigned long flags; | |
1857 | ||
1858 | if (!(info->flags & ASYNC_INITIALIZED)) | |
1859 | return; | |
1860 | ||
1861 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1862 | printk("%s(%d):mgsl_shutdown(%s)\n", | |
1863 | __FILE__,__LINE__, info->device_name ); | |
1864 | ||
1865 | /* clear status wait queue because status changes */ | |
1866 | /* can't happen after shutting down the hardware */ | |
1867 | wake_up_interruptible(&info->status_event_wait_q); | |
1868 | wake_up_interruptible(&info->event_wait_q); | |
1869 | ||
1870 | del_timer(&info->tx_timer); | |
1871 | ||
1872 | if (info->xmit_buf) { | |
1873 | free_page((unsigned long) info->xmit_buf); | |
1874 | info->xmit_buf = NULL; | |
1875 | } | |
1876 | ||
1877 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
1878 | usc_DisableMasterIrqBit(info); | |
1879 | usc_stop_receiver(info); | |
1880 | usc_stop_transmitter(info); | |
1881 | usc_DisableInterrupts(info,RECEIVE_DATA + RECEIVE_STATUS + | |
1882 | TRANSMIT_DATA + TRANSMIT_STATUS + IO_PIN + MISC ); | |
1883 | usc_DisableDmaInterrupts(info,DICR_MASTER + DICR_TRANSMIT + DICR_RECEIVE); | |
1884 | ||
1885 | /* Disable DMAEN (Port 7, Bit 14) */ | |
1886 | /* This disconnects the DMA request signal from the ISA bus */ | |
1887 | /* on the ISA adapter. This has no effect for the PCI adapter */ | |
1888 | usc_OutReg(info, PCR, (u16)((usc_InReg(info, PCR) | BIT15) | BIT14)); | |
1889 | ||
1890 | /* Disable INTEN (Port 6, Bit12) */ | |
1891 | /* This disconnects the IRQ request signal to the ISA bus */ | |
1892 | /* on the ISA adapter. This has no effect for the PCI adapter */ | |
1893 | usc_OutReg(info, PCR, (u16)((usc_InReg(info, PCR) | BIT13) | BIT12)); | |
1894 | ||
1895 | if (!info->tty || info->tty->termios->c_cflag & HUPCL) { | |
1896 | info->serial_signals &= ~(SerialSignal_DTR + SerialSignal_RTS); | |
1897 | usc_set_serial_signals(info); | |
1898 | } | |
1899 | ||
1900 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
1901 | ||
1902 | mgsl_release_resources(info); | |
1903 | ||
1904 | if (info->tty) | |
1905 | set_bit(TTY_IO_ERROR, &info->tty->flags); | |
1906 | ||
1907 | info->flags &= ~ASYNC_INITIALIZED; | |
1908 | ||
1909 | } /* end of shutdown() */ | |
1910 | ||
1911 | static void mgsl_program_hw(struct mgsl_struct *info) | |
1912 | { | |
1913 | unsigned long flags; | |
1914 | ||
1915 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
1916 | ||
1917 | usc_stop_receiver(info); | |
1918 | usc_stop_transmitter(info); | |
1919 | info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; | |
1920 | ||
1921 | if (info->params.mode == MGSL_MODE_HDLC || | |
1922 | info->params.mode == MGSL_MODE_RAW || | |
1923 | info->netcount) | |
1924 | usc_set_sync_mode(info); | |
1925 | else | |
1926 | usc_set_async_mode(info); | |
1927 | ||
1928 | usc_set_serial_signals(info); | |
1929 | ||
1930 | info->dcd_chkcount = 0; | |
1931 | info->cts_chkcount = 0; | |
1932 | info->ri_chkcount = 0; | |
1933 | info->dsr_chkcount = 0; | |
1934 | ||
1935 | usc_EnableStatusIrqs(info,SICR_CTS+SICR_DSR+SICR_DCD+SICR_RI); | |
1936 | usc_EnableInterrupts(info, IO_PIN); | |
1937 | usc_get_serial_signals(info); | |
1938 | ||
1939 | if (info->netcount || info->tty->termios->c_cflag & CREAD) | |
1940 | usc_start_receiver(info); | |
1941 | ||
1942 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
1943 | } | |
1944 | ||
1945 | /* Reconfigure adapter based on new parameters | |
1946 | */ | |
1947 | static void mgsl_change_params(struct mgsl_struct *info) | |
1948 | { | |
1949 | unsigned cflag; | |
1950 | int bits_per_char; | |
1951 | ||
1952 | if (!info->tty || !info->tty->termios) | |
1953 | return; | |
1954 | ||
1955 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1956 | printk("%s(%d):mgsl_change_params(%s)\n", | |
1957 | __FILE__,__LINE__, info->device_name ); | |
1958 | ||
1959 | cflag = info->tty->termios->c_cflag; | |
1960 | ||
1961 | /* if B0 rate (hangup) specified then negate DTR and RTS */ | |
1962 | /* otherwise assert DTR and RTS */ | |
1963 | if (cflag & CBAUD) | |
1964 | info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR; | |
1965 | else | |
1966 | info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR); | |
1967 | ||
1968 | /* byte size and parity */ | |
1969 | ||
1970 | switch (cflag & CSIZE) { | |
1971 | case CS5: info->params.data_bits = 5; break; | |
1972 | case CS6: info->params.data_bits = 6; break; | |
1973 | case CS7: info->params.data_bits = 7; break; | |
1974 | case CS8: info->params.data_bits = 8; break; | |
1975 | /* Never happens, but GCC is too dumb to figure it out */ | |
1976 | default: info->params.data_bits = 7; break; | |
1977 | } | |
1978 | ||
1979 | if (cflag & CSTOPB) | |
1980 | info->params.stop_bits = 2; | |
1981 | else | |
1982 | info->params.stop_bits = 1; | |
1983 | ||
1984 | info->params.parity = ASYNC_PARITY_NONE; | |
1985 | if (cflag & PARENB) { | |
1986 | if (cflag & PARODD) | |
1987 | info->params.parity = ASYNC_PARITY_ODD; | |
1988 | else | |
1989 | info->params.parity = ASYNC_PARITY_EVEN; | |
1990 | #ifdef CMSPAR | |
1991 | if (cflag & CMSPAR) | |
1992 | info->params.parity = ASYNC_PARITY_SPACE; | |
1993 | #endif | |
1994 | } | |
1995 | ||
1996 | /* calculate number of jiffies to transmit a full | |
1997 | * FIFO (32 bytes) at specified data rate | |
1998 | */ | |
1999 | bits_per_char = info->params.data_bits + | |
2000 | info->params.stop_bits + 1; | |
2001 | ||
2002 | /* if port data rate is set to 460800 or less then | |
2003 | * allow tty settings to override, otherwise keep the | |
2004 | * current data rate. | |
2005 | */ | |
2006 | if (info->params.data_rate <= 460800) | |
2007 | info->params.data_rate = tty_get_baud_rate(info->tty); | |
2008 | ||
2009 | if ( info->params.data_rate ) { | |
2010 | info->timeout = (32*HZ*bits_per_char) / | |
2011 | info->params.data_rate; | |
2012 | } | |
2013 | info->timeout += HZ/50; /* Add .02 seconds of slop */ | |
2014 | ||
2015 | if (cflag & CRTSCTS) | |
2016 | info->flags |= ASYNC_CTS_FLOW; | |
2017 | else | |
2018 | info->flags &= ~ASYNC_CTS_FLOW; | |
2019 | ||
2020 | if (cflag & CLOCAL) | |
2021 | info->flags &= ~ASYNC_CHECK_CD; | |
2022 | else | |
2023 | info->flags |= ASYNC_CHECK_CD; | |
2024 | ||
2025 | /* process tty input control flags */ | |
2026 | ||
2027 | info->read_status_mask = RXSTATUS_OVERRUN; | |
2028 | if (I_INPCK(info->tty)) | |
2029 | info->read_status_mask |= RXSTATUS_PARITY_ERROR | RXSTATUS_FRAMING_ERROR; | |
2030 | if (I_BRKINT(info->tty) || I_PARMRK(info->tty)) | |
2031 | info->read_status_mask |= RXSTATUS_BREAK_RECEIVED; | |
2032 | ||
2033 | if (I_IGNPAR(info->tty)) | |
2034 | info->ignore_status_mask |= RXSTATUS_PARITY_ERROR | RXSTATUS_FRAMING_ERROR; | |
2035 | if (I_IGNBRK(info->tty)) { | |
2036 | info->ignore_status_mask |= RXSTATUS_BREAK_RECEIVED; | |
2037 | /* If ignoring parity and break indicators, ignore | |
2038 | * overruns too. (For real raw support). | |
2039 | */ | |
2040 | if (I_IGNPAR(info->tty)) | |
2041 | info->ignore_status_mask |= RXSTATUS_OVERRUN; | |
2042 | } | |
2043 | ||
2044 | mgsl_program_hw(info); | |
2045 | ||
2046 | } /* end of mgsl_change_params() */ | |
2047 | ||
2048 | /* mgsl_put_char() | |
2049 | * | |
2050 | * Add a character to the transmit buffer. | |
2051 | * | |
2052 | * Arguments: tty pointer to tty information structure | |
2053 | * ch character to add to transmit buffer | |
2054 | * | |
2055 | * Return Value: None | |
2056 | */ | |
2057 | static void mgsl_put_char(struct tty_struct *tty, unsigned char ch) | |
2058 | { | |
2059 | struct mgsl_struct *info = (struct mgsl_struct *)tty->driver_data; | |
2060 | unsigned long flags; | |
2061 | ||
2062 | if ( debug_level >= DEBUG_LEVEL_INFO ) { | |
2063 | printk( "%s(%d):mgsl_put_char(%d) on %s\n", | |
2064 | __FILE__,__LINE__,ch,info->device_name); | |
2065 | } | |
2066 | ||
2067 | if (mgsl_paranoia_check(info, tty->name, "mgsl_put_char")) | |
2068 | return; | |
2069 | ||
2070 | if (!tty || !info->xmit_buf) | |
2071 | return; | |
2072 | ||
2073 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
2074 | ||
2075 | if ( (info->params.mode == MGSL_MODE_ASYNC ) || !info->tx_active ) { | |
2076 | ||
2077 | if (info->xmit_cnt < SERIAL_XMIT_SIZE - 1) { | |
2078 | info->xmit_buf[info->xmit_head++] = ch; | |
2079 | info->xmit_head &= SERIAL_XMIT_SIZE-1; | |
2080 | info->xmit_cnt++; | |
2081 | } | |
2082 | } | |
2083 | ||
2084 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
2085 | ||
2086 | } /* end of mgsl_put_char() */ | |
2087 | ||
2088 | /* mgsl_flush_chars() | |
2089 | * | |
2090 | * Enable transmitter so remaining characters in the | |
2091 | * transmit buffer are sent. | |
2092 | * | |
2093 | * Arguments: tty pointer to tty information structure | |
2094 | * Return Value: None | |
2095 | */ | |
2096 | static void mgsl_flush_chars(struct tty_struct *tty) | |
2097 | { | |
2098 | struct mgsl_struct *info = (struct mgsl_struct *)tty->driver_data; | |
2099 | unsigned long flags; | |
2100 | ||
2101 | if ( debug_level >= DEBUG_LEVEL_INFO ) | |
2102 | printk( "%s(%d):mgsl_flush_chars() entry on %s xmit_cnt=%d\n", | |
2103 | __FILE__,__LINE__,info->device_name,info->xmit_cnt); | |
2104 | ||
2105 | if (mgsl_paranoia_check(info, tty->name, "mgsl_flush_chars")) | |
2106 | return; | |
2107 | ||
2108 | if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped || | |
2109 | !info->xmit_buf) | |
2110 | return; | |
2111 | ||
2112 | if ( debug_level >= DEBUG_LEVEL_INFO ) | |
2113 | printk( "%s(%d):mgsl_flush_chars() entry on %s starting transmitter\n", | |
2114 | __FILE__,__LINE__,info->device_name ); | |
2115 | ||
2116 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
2117 | ||
2118 | if (!info->tx_active) { | |
2119 | if ( (info->params.mode == MGSL_MODE_HDLC || | |
2120 | info->params.mode == MGSL_MODE_RAW) && info->xmit_cnt ) { | |
2121 | /* operating in synchronous (frame oriented) mode */ | |
2122 | /* copy data from circular xmit_buf to */ | |
2123 | /* transmit DMA buffer. */ | |
2124 | mgsl_load_tx_dma_buffer(info, | |
2125 | info->xmit_buf,info->xmit_cnt); | |
2126 | } | |
2127 | usc_start_transmitter(info); | |
2128 | } | |
2129 | ||
2130 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
2131 | ||
2132 | } /* end of mgsl_flush_chars() */ | |
2133 | ||
2134 | /* mgsl_write() | |
2135 | * | |
2136 | * Send a block of data | |
2137 | * | |
2138 | * Arguments: | |
2139 | * | |
2140 | * tty pointer to tty information structure | |
2141 | * buf pointer to buffer containing send data | |
2142 | * count size of send data in bytes | |
2143 | * | |
2144 | * Return Value: number of characters written | |
2145 | */ | |
2146 | static int mgsl_write(struct tty_struct * tty, | |
2147 | const unsigned char *buf, int count) | |
2148 | { | |
2149 | int c, ret = 0; | |
2150 | struct mgsl_struct *info = (struct mgsl_struct *)tty->driver_data; | |
2151 | unsigned long flags; | |
2152 | ||
2153 | if ( debug_level >= DEBUG_LEVEL_INFO ) | |
2154 | printk( "%s(%d):mgsl_write(%s) count=%d\n", | |
2155 | __FILE__,__LINE__,info->device_name,count); | |
2156 | ||
2157 | if (mgsl_paranoia_check(info, tty->name, "mgsl_write")) | |
2158 | goto cleanup; | |
2159 | ||
2160 | if (!tty || !info->xmit_buf || !tmp_buf) | |
2161 | goto cleanup; | |
2162 | ||
2163 | if ( info->params.mode == MGSL_MODE_HDLC || | |
2164 | info->params.mode == MGSL_MODE_RAW ) { | |
2165 | /* operating in synchronous (frame oriented) mode */ | |
2166 | /* operating in synchronous (frame oriented) mode */ | |
2167 | if (info->tx_active) { | |
2168 | ||
2169 | if ( info->params.mode == MGSL_MODE_HDLC ) { | |
2170 | ret = 0; | |
2171 | goto cleanup; | |
2172 | } | |
2173 | /* transmitter is actively sending data - | |
2174 | * if we have multiple transmit dma and | |
2175 | * holding buffers, attempt to queue this | |
2176 | * frame for transmission at a later time. | |
2177 | */ | |
2178 | if (info->tx_holding_count >= info->num_tx_holding_buffers ) { | |
2179 | /* no tx holding buffers available */ | |
2180 | ret = 0; | |
2181 | goto cleanup; | |
2182 | } | |
2183 | ||
2184 | /* queue transmit frame request */ | |
2185 | ret = count; | |
2186 | save_tx_buffer_request(info,buf,count); | |
2187 | ||
2188 | /* if we have sufficient tx dma buffers, | |
2189 | * load the next buffered tx request | |
2190 | */ | |
2191 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
2192 | load_next_tx_holding_buffer(info); | |
2193 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
2194 | goto cleanup; | |
2195 | } | |
2196 | ||
2197 | /* if operating in HDLC LoopMode and the adapter */ | |
2198 | /* has yet to be inserted into the loop, we can't */ | |
2199 | /* transmit */ | |
2200 | ||
2201 | if ( (info->params.flags & HDLC_FLAG_HDLC_LOOPMODE) && | |
2202 | !usc_loopmode_active(info) ) | |
2203 | { | |
2204 | ret = 0; | |
2205 | goto cleanup; | |
2206 | } | |
2207 | ||
2208 | if ( info->xmit_cnt ) { | |
2209 | /* Send accumulated from send_char() calls */ | |
2210 | /* as frame and wait before accepting more data. */ | |
2211 | ret = 0; | |
2212 | ||
2213 | /* copy data from circular xmit_buf to */ | |
2214 | /* transmit DMA buffer. */ | |
2215 | mgsl_load_tx_dma_buffer(info, | |
2216 | info->xmit_buf,info->xmit_cnt); | |
2217 | if ( debug_level >= DEBUG_LEVEL_INFO ) | |
2218 | printk( "%s(%d):mgsl_write(%s) sync xmit_cnt flushing\n", | |
2219 | __FILE__,__LINE__,info->device_name); | |
2220 | } else { | |
2221 | if ( debug_level >= DEBUG_LEVEL_INFO ) | |
2222 | printk( "%s(%d):mgsl_write(%s) sync transmit accepted\n", | |
2223 | __FILE__,__LINE__,info->device_name); | |
2224 | ret = count; | |
2225 | info->xmit_cnt = count; | |
2226 | mgsl_load_tx_dma_buffer(info,buf,count); | |
2227 | } | |
2228 | } else { | |
2229 | while (1) { | |
2230 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
2231 | c = min_t(int, count, | |
2232 | min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1, | |
2233 | SERIAL_XMIT_SIZE - info->xmit_head)); | |
2234 | if (c <= 0) { | |
2235 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
2236 | break; | |
2237 | } | |
2238 | memcpy(info->xmit_buf + info->xmit_head, buf, c); | |
2239 | info->xmit_head = ((info->xmit_head + c) & | |
2240 | (SERIAL_XMIT_SIZE-1)); | |
2241 | info->xmit_cnt += c; | |
2242 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
2243 | buf += c; | |
2244 | count -= c; | |
2245 | ret += c; | |
2246 | } | |
2247 | } | |
2248 | ||
2249 | if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) { | |
2250 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
2251 | if (!info->tx_active) | |
2252 | usc_start_transmitter(info); | |
2253 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
2254 | } | |
2255 | cleanup: | |
2256 | if ( debug_level >= DEBUG_LEVEL_INFO ) | |
2257 | printk( "%s(%d):mgsl_write(%s) returning=%d\n", | |
2258 | __FILE__,__LINE__,info->device_name,ret); | |
2259 | ||
2260 | return ret; | |
2261 | ||
2262 | } /* end of mgsl_write() */ | |
2263 | ||
2264 | /* mgsl_write_room() | |
2265 | * | |
2266 | * Return the count of free bytes in transmit buffer | |
2267 | * | |
2268 | * Arguments: tty pointer to tty info structure | |
2269 | * Return Value: None | |
2270 | */ | |
2271 | static int mgsl_write_room(struct tty_struct *tty) | |
2272 | { | |
2273 | struct mgsl_struct *info = (struct mgsl_struct *)tty->driver_data; | |
2274 | int ret; | |
2275 | ||
2276 | if (mgsl_paranoia_check(info, tty->name, "mgsl_write_room")) | |
2277 | return 0; | |
2278 | ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1; | |
2279 | if (ret < 0) | |
2280 | ret = 0; | |
2281 | ||
2282 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2283 | printk("%s(%d):mgsl_write_room(%s)=%d\n", | |
2284 | __FILE__,__LINE__, info->device_name,ret ); | |
2285 | ||
2286 | if ( info->params.mode == MGSL_MODE_HDLC || | |
2287 | info->params.mode == MGSL_MODE_RAW ) { | |
2288 | /* operating in synchronous (frame oriented) mode */ | |
2289 | if ( info->tx_active ) | |
2290 | return 0; | |
2291 | else | |
2292 | return HDLC_MAX_FRAME_SIZE; | |
2293 | } | |
2294 | ||
2295 | return ret; | |
2296 | ||
2297 | } /* end of mgsl_write_room() */ | |
2298 | ||
2299 | /* mgsl_chars_in_buffer() | |
2300 | * | |
2301 | * Return the count of bytes in transmit buffer | |
2302 | * | |
2303 | * Arguments: tty pointer to tty info structure | |
2304 | * Return Value: None | |
2305 | */ | |
2306 | static int mgsl_chars_in_buffer(struct tty_struct *tty) | |
2307 | { | |
2308 | struct mgsl_struct *info = (struct mgsl_struct *)tty->driver_data; | |
2309 | ||
2310 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2311 | printk("%s(%d):mgsl_chars_in_buffer(%s)\n", | |
2312 | __FILE__,__LINE__, info->device_name ); | |
2313 | ||
2314 | if (mgsl_paranoia_check(info, tty->name, "mgsl_chars_in_buffer")) | |
2315 | return 0; | |
2316 | ||
2317 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2318 | printk("%s(%d):mgsl_chars_in_buffer(%s)=%d\n", | |
2319 | __FILE__,__LINE__, info->device_name,info->xmit_cnt ); | |
2320 | ||
2321 | if ( info->params.mode == MGSL_MODE_HDLC || | |
2322 | info->params.mode == MGSL_MODE_RAW ) { | |
2323 | /* operating in synchronous (frame oriented) mode */ | |
2324 | if ( info->tx_active ) | |
2325 | return info->max_frame_size; | |
2326 | else | |
2327 | return 0; | |
2328 | } | |
2329 | ||
2330 | return info->xmit_cnt; | |
2331 | } /* end of mgsl_chars_in_buffer() */ | |
2332 | ||
2333 | /* mgsl_flush_buffer() | |
2334 | * | |
2335 | * Discard all data in the send buffer | |
2336 | * | |
2337 | * Arguments: tty pointer to tty info structure | |
2338 | * Return Value: None | |
2339 | */ | |
2340 | static void mgsl_flush_buffer(struct tty_struct *tty) | |
2341 | { | |
2342 | struct mgsl_struct *info = (struct mgsl_struct *)tty->driver_data; | |
2343 | unsigned long flags; | |
2344 | ||
2345 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2346 | printk("%s(%d):mgsl_flush_buffer(%s) entry\n", | |
2347 | __FILE__,__LINE__, info->device_name ); | |
2348 | ||
2349 | if (mgsl_paranoia_check(info, tty->name, "mgsl_flush_buffer")) | |
2350 | return; | |
2351 | ||
2352 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
2353 | info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; | |
2354 | del_timer(&info->tx_timer); | |
2355 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
2356 | ||
2357 | wake_up_interruptible(&tty->write_wait); | |
2358 | tty_wakeup(tty); | |
2359 | } | |
2360 | ||
2361 | /* mgsl_send_xchar() | |
2362 | * | |
2363 | * Send a high-priority XON/XOFF character | |
2364 | * | |
2365 | * Arguments: tty pointer to tty info structure | |
2366 | * ch character to send | |
2367 | * Return Value: None | |
2368 | */ | |
2369 | static void mgsl_send_xchar(struct tty_struct *tty, char ch) | |
2370 | { | |
2371 | struct mgsl_struct *info = (struct mgsl_struct *)tty->driver_data; | |
2372 | unsigned long flags; | |
2373 | ||
2374 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2375 | printk("%s(%d):mgsl_send_xchar(%s,%d)\n", | |
2376 | __FILE__,__LINE__, info->device_name, ch ); | |
2377 | ||
2378 | if (mgsl_paranoia_check(info, tty->name, "mgsl_send_xchar")) | |
2379 | return; | |
2380 | ||
2381 | info->x_char = ch; | |
2382 | if (ch) { | |
2383 | /* Make sure transmit interrupts are on */ | |
2384 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
2385 | if (!info->tx_enabled) | |
2386 | usc_start_transmitter(info); | |
2387 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
2388 | } | |
2389 | } /* end of mgsl_send_xchar() */ | |
2390 | ||
2391 | /* mgsl_throttle() | |
2392 | * | |
2393 | * Signal remote device to throttle send data (our receive data) | |
2394 | * | |
2395 | * Arguments: tty pointer to tty info structure | |
2396 | * Return Value: None | |
2397 | */ | |
2398 | static void mgsl_throttle(struct tty_struct * tty) | |
2399 | { | |
2400 | struct mgsl_struct *info = (struct mgsl_struct *)tty->driver_data; | |
2401 | unsigned long flags; | |
2402 | ||
2403 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2404 | printk("%s(%d):mgsl_throttle(%s) entry\n", | |
2405 | __FILE__,__LINE__, info->device_name ); | |
2406 | ||
2407 | if (mgsl_paranoia_check(info, tty->name, "mgsl_throttle")) | |
2408 | return; | |
2409 | ||
2410 | if (I_IXOFF(tty)) | |
2411 | mgsl_send_xchar(tty, STOP_CHAR(tty)); | |
2412 | ||
2413 | if (tty->termios->c_cflag & CRTSCTS) { | |
2414 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
2415 | info->serial_signals &= ~SerialSignal_RTS; | |
2416 | usc_set_serial_signals(info); | |
2417 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
2418 | } | |
2419 | } /* end of mgsl_throttle() */ | |
2420 | ||
2421 | /* mgsl_unthrottle() | |
2422 | * | |
2423 | * Signal remote device to stop throttling send data (our receive data) | |
2424 | * | |
2425 | * Arguments: tty pointer to tty info structure | |
2426 | * Return Value: None | |
2427 | */ | |
2428 | static void mgsl_unthrottle(struct tty_struct * tty) | |
2429 | { | |
2430 | struct mgsl_struct *info = (struct mgsl_struct *)tty->driver_data; | |
2431 | unsigned long flags; | |
2432 | ||
2433 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2434 | printk("%s(%d):mgsl_unthrottle(%s) entry\n", | |
2435 | __FILE__,__LINE__, info->device_name ); | |
2436 | ||
2437 | if (mgsl_paranoia_check(info, tty->name, "mgsl_unthrottle")) | |
2438 | return; | |
2439 | ||
2440 | if (I_IXOFF(tty)) { | |
2441 | if (info->x_char) | |
2442 | info->x_char = 0; | |
2443 | else | |
2444 | mgsl_send_xchar(tty, START_CHAR(tty)); | |
2445 | } | |
2446 | ||
2447 | if (tty->termios->c_cflag & CRTSCTS) { | |
2448 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
2449 | info->serial_signals |= SerialSignal_RTS; | |
2450 | usc_set_serial_signals(info); | |
2451 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
2452 | } | |
2453 | ||
2454 | } /* end of mgsl_unthrottle() */ | |
2455 | ||
2456 | /* mgsl_get_stats() | |
2457 | * | |
2458 | * get the current serial parameters information | |
2459 | * | |
2460 | * Arguments: info pointer to device instance data | |
2461 | * user_icount pointer to buffer to hold returned stats | |
2462 | * | |
2463 | * Return Value: 0 if success, otherwise error code | |
2464 | */ | |
2465 | static int mgsl_get_stats(struct mgsl_struct * info, struct mgsl_icount __user *user_icount) | |
2466 | { | |
2467 | int err; | |
2468 | ||
2469 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2470 | printk("%s(%d):mgsl_get_params(%s)\n", | |
2471 | __FILE__,__LINE__, info->device_name); | |
2472 | ||
2473 | COPY_TO_USER(err,user_icount, &info->icount, sizeof(struct mgsl_icount)); | |
2474 | if (err) { | |
2475 | if ( debug_level >= DEBUG_LEVEL_INFO ) | |
2476 | printk( "%s(%d):mgsl_get_stats(%s) user buffer copy failed\n", | |
2477 | __FILE__,__LINE__,info->device_name); | |
2478 | return -EFAULT; | |
2479 | } | |
2480 | ||
2481 | return 0; | |
2482 | ||
2483 | } /* end of mgsl_get_stats() */ | |
2484 | ||
2485 | /* mgsl_get_params() | |
2486 | * | |
2487 | * get the current serial parameters information | |
2488 | * | |
2489 | * Arguments: info pointer to device instance data | |
2490 | * user_params pointer to buffer to hold returned params | |
2491 | * | |
2492 | * Return Value: 0 if success, otherwise error code | |
2493 | */ | |
2494 | static int mgsl_get_params(struct mgsl_struct * info, MGSL_PARAMS __user *user_params) | |
2495 | { | |
2496 | int err; | |
2497 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2498 | printk("%s(%d):mgsl_get_params(%s)\n", | |
2499 | __FILE__,__LINE__, info->device_name); | |
2500 | ||
2501 | COPY_TO_USER(err,user_params, &info->params, sizeof(MGSL_PARAMS)); | |
2502 | if (err) { | |
2503 | if ( debug_level >= DEBUG_LEVEL_INFO ) | |
2504 | printk( "%s(%d):mgsl_get_params(%s) user buffer copy failed\n", | |
2505 | __FILE__,__LINE__,info->device_name); | |
2506 | return -EFAULT; | |
2507 | } | |
2508 | ||
2509 | return 0; | |
2510 | ||
2511 | } /* end of mgsl_get_params() */ | |
2512 | ||
2513 | /* mgsl_set_params() | |
2514 | * | |
2515 | * set the serial parameters | |
2516 | * | |
2517 | * Arguments: | |
2518 | * | |
2519 | * info pointer to device instance data | |
2520 | * new_params user buffer containing new serial params | |
2521 | * | |
2522 | * Return Value: 0 if success, otherwise error code | |
2523 | */ | |
2524 | static int mgsl_set_params(struct mgsl_struct * info, MGSL_PARAMS __user *new_params) | |
2525 | { | |
2526 | unsigned long flags; | |
2527 | MGSL_PARAMS tmp_params; | |
2528 | int err; | |
2529 | ||
2530 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2531 | printk("%s(%d):mgsl_set_params %s\n", __FILE__,__LINE__, | |
2532 | info->device_name ); | |
2533 | COPY_FROM_USER(err,&tmp_params, new_params, sizeof(MGSL_PARAMS)); | |
2534 | if (err) { | |
2535 | if ( debug_level >= DEBUG_LEVEL_INFO ) | |
2536 | printk( "%s(%d):mgsl_set_params(%s) user buffer copy failed\n", | |
2537 | __FILE__,__LINE__,info->device_name); | |
2538 | return -EFAULT; | |
2539 | } | |
2540 | ||
2541 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
2542 | memcpy(&info->params,&tmp_params,sizeof(MGSL_PARAMS)); | |
2543 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
2544 | ||
2545 | mgsl_change_params(info); | |
2546 | ||
2547 | return 0; | |
2548 | ||
2549 | } /* end of mgsl_set_params() */ | |
2550 | ||
2551 | /* mgsl_get_txidle() | |
2552 | * | |
2553 | * get the current transmit idle mode | |
2554 | * | |
2555 | * Arguments: info pointer to device instance data | |
2556 | * idle_mode pointer to buffer to hold returned idle mode | |
2557 | * | |
2558 | * Return Value: 0 if success, otherwise error code | |
2559 | */ | |
2560 | static int mgsl_get_txidle(struct mgsl_struct * info, int __user *idle_mode) | |
2561 | { | |
2562 | int err; | |
2563 | ||
2564 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2565 | printk("%s(%d):mgsl_get_txidle(%s)=%d\n", | |
2566 | __FILE__,__LINE__, info->device_name, info->idle_mode); | |
2567 | ||
2568 | COPY_TO_USER(err,idle_mode, &info->idle_mode, sizeof(int)); | |
2569 | if (err) { | |
2570 | if ( debug_level >= DEBUG_LEVEL_INFO ) | |
2571 | printk( "%s(%d):mgsl_get_txidle(%s) user buffer copy failed\n", | |
2572 | __FILE__,__LINE__,info->device_name); | |
2573 | return -EFAULT; | |
2574 | } | |
2575 | ||
2576 | return 0; | |
2577 | ||
2578 | } /* end of mgsl_get_txidle() */ | |
2579 | ||
2580 | /* mgsl_set_txidle() service ioctl to set transmit idle mode | |
2581 | * | |
2582 | * Arguments: info pointer to device instance data | |
2583 | * idle_mode new idle mode | |
2584 | * | |
2585 | * Return Value: 0 if success, otherwise error code | |
2586 | */ | |
2587 | static int mgsl_set_txidle(struct mgsl_struct * info, int idle_mode) | |
2588 | { | |
2589 | unsigned long flags; | |
2590 | ||
2591 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2592 | printk("%s(%d):mgsl_set_txidle(%s,%d)\n", __FILE__,__LINE__, | |
2593 | info->device_name, idle_mode ); | |
2594 | ||
2595 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
2596 | info->idle_mode = idle_mode; | |
2597 | usc_set_txidle( info ); | |
2598 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
2599 | return 0; | |
2600 | ||
2601 | } /* end of mgsl_set_txidle() */ | |
2602 | ||
2603 | /* mgsl_txenable() | |
2604 | * | |
2605 | * enable or disable the transmitter | |
2606 | * | |
2607 | * Arguments: | |
2608 | * | |
2609 | * info pointer to device instance data | |
2610 | * enable 1 = enable, 0 = disable | |
2611 | * | |
2612 | * Return Value: 0 if success, otherwise error code | |
2613 | */ | |
2614 | static int mgsl_txenable(struct mgsl_struct * info, int enable) | |
2615 | { | |
2616 | unsigned long flags; | |
2617 | ||
2618 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2619 | printk("%s(%d):mgsl_txenable(%s,%d)\n", __FILE__,__LINE__, | |
2620 | info->device_name, enable); | |
2621 | ||
2622 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
2623 | if ( enable ) { | |
2624 | if ( !info->tx_enabled ) { | |
2625 | ||
2626 | usc_start_transmitter(info); | |
2627 | /*-------------------------------------------------- | |
2628 | * if HDLC/SDLC Loop mode, attempt to insert the | |
2629 | * station in the 'loop' by setting CMR:13. Upon | |
2630 | * receipt of the next GoAhead (RxAbort) sequence, | |
2631 | * the OnLoop indicator (CCSR:7) should go active | |
2632 | * to indicate that we are on the loop | |
2633 | *--------------------------------------------------*/ | |
2634 | if ( info->params.flags & HDLC_FLAG_HDLC_LOOPMODE ) | |
2635 | usc_loopmode_insert_request( info ); | |
2636 | } | |
2637 | } else { | |
2638 | if ( info->tx_enabled ) | |
2639 | usc_stop_transmitter(info); | |
2640 | } | |
2641 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
2642 | return 0; | |
2643 | ||
2644 | } /* end of mgsl_txenable() */ | |
2645 | ||
2646 | /* mgsl_txabort() abort send HDLC frame | |
2647 | * | |
2648 | * Arguments: info pointer to device instance data | |
2649 | * Return Value: 0 if success, otherwise error code | |
2650 | */ | |
2651 | static int mgsl_txabort(struct mgsl_struct * info) | |
2652 | { | |
2653 | unsigned long flags; | |
2654 | ||
2655 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2656 | printk("%s(%d):mgsl_txabort(%s)\n", __FILE__,__LINE__, | |
2657 | info->device_name); | |
2658 | ||
2659 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
2660 | if ( info->tx_active && info->params.mode == MGSL_MODE_HDLC ) | |
2661 | { | |
2662 | if ( info->params.flags & HDLC_FLAG_HDLC_LOOPMODE ) | |
2663 | usc_loopmode_cancel_transmit( info ); | |
2664 | else | |
2665 | usc_TCmd(info,TCmd_SendAbort); | |
2666 | } | |
2667 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
2668 | return 0; | |
2669 | ||
2670 | } /* end of mgsl_txabort() */ | |
2671 | ||
2672 | /* mgsl_rxenable() enable or disable the receiver | |
2673 | * | |
2674 | * Arguments: info pointer to device instance data | |
2675 | * enable 1 = enable, 0 = disable | |
2676 | * Return Value: 0 if success, otherwise error code | |
2677 | */ | |
2678 | static int mgsl_rxenable(struct mgsl_struct * info, int enable) | |
2679 | { | |
2680 | unsigned long flags; | |
2681 | ||
2682 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2683 | printk("%s(%d):mgsl_rxenable(%s,%d)\n", __FILE__,__LINE__, | |
2684 | info->device_name, enable); | |
2685 | ||
2686 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
2687 | if ( enable ) { | |
2688 | if ( !info->rx_enabled ) | |
2689 | usc_start_receiver(info); | |
2690 | } else { | |
2691 | if ( info->rx_enabled ) | |
2692 | usc_stop_receiver(info); | |
2693 | } | |
2694 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
2695 | return 0; | |
2696 | ||
2697 | } /* end of mgsl_rxenable() */ | |
2698 | ||
2699 | /* mgsl_wait_event() wait for specified event to occur | |
2700 | * | |
2701 | * Arguments: info pointer to device instance data | |
2702 | * mask pointer to bitmask of events to wait for | |
2703 | * Return Value: 0 if successful and bit mask updated with | |
2704 | * of events triggerred, | |
2705 | * otherwise error code | |
2706 | */ | |
2707 | static int mgsl_wait_event(struct mgsl_struct * info, int __user * mask_ptr) | |
2708 | { | |
2709 | unsigned long flags; | |
2710 | int s; | |
2711 | int rc=0; | |
2712 | struct mgsl_icount cprev, cnow; | |
2713 | int events; | |
2714 | int mask; | |
2715 | struct _input_signal_events oldsigs, newsigs; | |
2716 | DECLARE_WAITQUEUE(wait, current); | |
2717 | ||
2718 | COPY_FROM_USER(rc,&mask, mask_ptr, sizeof(int)); | |
2719 | if (rc) { | |
2720 | return -EFAULT; | |
2721 | } | |
2722 | ||
2723 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2724 | printk("%s(%d):mgsl_wait_event(%s,%d)\n", __FILE__,__LINE__, | |
2725 | info->device_name, mask); | |
2726 | ||
2727 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
2728 | ||
2729 | /* return immediately if state matches requested events */ | |
2730 | usc_get_serial_signals(info); | |
2731 | s = info->serial_signals; | |
2732 | events = mask & | |
2733 | ( ((s & SerialSignal_DSR) ? MgslEvent_DsrActive:MgslEvent_DsrInactive) + | |
2734 | ((s & SerialSignal_DCD) ? MgslEvent_DcdActive:MgslEvent_DcdInactive) + | |
2735 | ((s & SerialSignal_CTS) ? MgslEvent_CtsActive:MgslEvent_CtsInactive) + | |
2736 | ((s & SerialSignal_RI) ? MgslEvent_RiActive :MgslEvent_RiInactive) ); | |
2737 | if (events) { | |
2738 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
2739 | goto exit; | |
2740 | } | |
2741 | ||
2742 | /* save current irq counts */ | |
2743 | cprev = info->icount; | |
2744 | oldsigs = info->input_signal_events; | |
2745 | ||
2746 | /* enable hunt and idle irqs if needed */ | |
2747 | if (mask & (MgslEvent_ExitHuntMode + MgslEvent_IdleReceived)) { | |
2748 | u16 oldreg = usc_InReg(info,RICR); | |
2749 | u16 newreg = oldreg + | |
2750 | (mask & MgslEvent_ExitHuntMode ? RXSTATUS_EXITED_HUNT:0) + | |
2751 | (mask & MgslEvent_IdleReceived ? RXSTATUS_IDLE_RECEIVED:0); | |
2752 | if (oldreg != newreg) | |
2753 | usc_OutReg(info, RICR, newreg); | |
2754 | } | |
2755 | ||
2756 | set_current_state(TASK_INTERRUPTIBLE); | |
2757 | add_wait_queue(&info->event_wait_q, &wait); | |
2758 | ||
2759 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
2760 | ||
2761 | ||
2762 | for(;;) { | |
2763 | schedule(); | |
2764 | if (signal_pending(current)) { | |
2765 | rc = -ERESTARTSYS; | |
2766 | break; | |
2767 | } | |
2768 | ||
2769 | /* get current irq counts */ | |
2770 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
2771 | cnow = info->icount; | |
2772 | newsigs = info->input_signal_events; | |
2773 | set_current_state(TASK_INTERRUPTIBLE); | |
2774 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
2775 | ||
2776 | /* if no change, wait aborted for some reason */ | |
2777 | if (newsigs.dsr_up == oldsigs.dsr_up && | |
2778 | newsigs.dsr_down == oldsigs.dsr_down && | |
2779 | newsigs.dcd_up == oldsigs.dcd_up && | |
2780 | newsigs.dcd_down == oldsigs.dcd_down && | |
2781 | newsigs.cts_up == oldsigs.cts_up && | |
2782 | newsigs.cts_down == oldsigs.cts_down && | |
2783 | newsigs.ri_up == oldsigs.ri_up && | |
2784 | newsigs.ri_down == oldsigs.ri_down && | |
2785 | cnow.exithunt == cprev.exithunt && | |
2786 | cnow.rxidle == cprev.rxidle) { | |
2787 | rc = -EIO; | |
2788 | break; | |
2789 | } | |
2790 | ||
2791 | events = mask & | |
2792 | ( (newsigs.dsr_up != oldsigs.dsr_up ? MgslEvent_DsrActive:0) + | |
2793 | (newsigs.dsr_down != oldsigs.dsr_down ? MgslEvent_DsrInactive:0) + | |
2794 | (newsigs.dcd_up != oldsigs.dcd_up ? MgslEvent_DcdActive:0) + | |
2795 | (newsigs.dcd_down != oldsigs.dcd_down ? MgslEvent_DcdInactive:0) + | |
2796 | (newsigs.cts_up != oldsigs.cts_up ? MgslEvent_CtsActive:0) + | |
2797 | (newsigs.cts_down != oldsigs.cts_down ? MgslEvent_CtsInactive:0) + | |
2798 | (newsigs.ri_up != oldsigs.ri_up ? MgslEvent_RiActive:0) + | |
2799 | (newsigs.ri_down != oldsigs.ri_down ? MgslEvent_RiInactive:0) + | |
2800 | (cnow.exithunt != cprev.exithunt ? MgslEvent_ExitHuntMode:0) + | |
2801 | (cnow.rxidle != cprev.rxidle ? MgslEvent_IdleReceived:0) ); | |
2802 | if (events) | |
2803 | break; | |
2804 | ||
2805 | cprev = cnow; | |
2806 | oldsigs = newsigs; | |
2807 | } | |
2808 | ||
2809 | remove_wait_queue(&info->event_wait_q, &wait); | |
2810 | set_current_state(TASK_RUNNING); | |
2811 | ||
2812 | if (mask & (MgslEvent_ExitHuntMode + MgslEvent_IdleReceived)) { | |
2813 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
2814 | if (!waitqueue_active(&info->event_wait_q)) { | |
2815 | /* disable enable exit hunt mode/idle rcvd IRQs */ | |
2816 | usc_OutReg(info, RICR, usc_InReg(info,RICR) & | |
2817 | ~(RXSTATUS_EXITED_HUNT + RXSTATUS_IDLE_RECEIVED)); | |
2818 | } | |
2819 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
2820 | } | |
2821 | exit: | |
2822 | if ( rc == 0 ) | |
2823 | PUT_USER(rc, events, mask_ptr); | |
2824 | ||
2825 | return rc; | |
2826 | ||
2827 | } /* end of mgsl_wait_event() */ | |
2828 | ||
2829 | static int modem_input_wait(struct mgsl_struct *info,int arg) | |
2830 | { | |
2831 | unsigned long flags; | |
2832 | int rc; | |
2833 | struct mgsl_icount cprev, cnow; | |
2834 | DECLARE_WAITQUEUE(wait, current); | |
2835 | ||
2836 | /* save current irq counts */ | |
2837 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
2838 | cprev = info->icount; | |
2839 | add_wait_queue(&info->status_event_wait_q, &wait); | |
2840 | set_current_state(TASK_INTERRUPTIBLE); | |
2841 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
2842 | ||
2843 | for(;;) { | |
2844 | schedule(); | |
2845 | if (signal_pending(current)) { | |
2846 | rc = -ERESTARTSYS; | |
2847 | break; | |
2848 | } | |
2849 | ||
2850 | /* get new irq counts */ | |
2851 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
2852 | cnow = info->icount; | |
2853 | set_current_state(TASK_INTERRUPTIBLE); | |
2854 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
2855 | ||
2856 | /* if no change, wait aborted for some reason */ | |
2857 | if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && | |
2858 | cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) { | |
2859 | rc = -EIO; | |
2860 | break; | |
2861 | } | |
2862 | ||
2863 | /* check for change in caller specified modem input */ | |
2864 | if ((arg & TIOCM_RNG && cnow.rng != cprev.rng) || | |
2865 | (arg & TIOCM_DSR && cnow.dsr != cprev.dsr) || | |
2866 | (arg & TIOCM_CD && cnow.dcd != cprev.dcd) || | |
2867 | (arg & TIOCM_CTS && cnow.cts != cprev.cts)) { | |
2868 | rc = 0; | |
2869 | break; | |
2870 | } | |
2871 | ||
2872 | cprev = cnow; | |
2873 | } | |
2874 | remove_wait_queue(&info->status_event_wait_q, &wait); | |
2875 | set_current_state(TASK_RUNNING); | |
2876 | return rc; | |
2877 | } | |
2878 | ||
2879 | /* return the state of the serial control and status signals | |
2880 | */ | |
2881 | static int tiocmget(struct tty_struct *tty, struct file *file) | |
2882 | { | |
2883 | struct mgsl_struct *info = (struct mgsl_struct *)tty->driver_data; | |
2884 | unsigned int result; | |
2885 | unsigned long flags; | |
2886 | ||
2887 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
2888 | usc_get_serial_signals(info); | |
2889 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
2890 | ||
2891 | result = ((info->serial_signals & SerialSignal_RTS) ? TIOCM_RTS:0) + | |
2892 | ((info->serial_signals & SerialSignal_DTR) ? TIOCM_DTR:0) + | |
2893 | ((info->serial_signals & SerialSignal_DCD) ? TIOCM_CAR:0) + | |
2894 | ((info->serial_signals & SerialSignal_RI) ? TIOCM_RNG:0) + | |
2895 | ((info->serial_signals & SerialSignal_DSR) ? TIOCM_DSR:0) + | |
2896 | ((info->serial_signals & SerialSignal_CTS) ? TIOCM_CTS:0); | |
2897 | ||
2898 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2899 | printk("%s(%d):%s tiocmget() value=%08X\n", | |
2900 | __FILE__,__LINE__, info->device_name, result ); | |
2901 | return result; | |
2902 | } | |
2903 | ||
2904 | /* set modem control signals (DTR/RTS) | |
2905 | */ | |
2906 | static int tiocmset(struct tty_struct *tty, struct file *file, | |
2907 | unsigned int set, unsigned int clear) | |
2908 | { | |
2909 | struct mgsl_struct *info = (struct mgsl_struct *)tty->driver_data; | |
2910 | unsigned long flags; | |
2911 | ||
2912 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2913 | printk("%s(%d):%s tiocmset(%x,%x)\n", | |
2914 | __FILE__,__LINE__,info->device_name, set, clear); | |
2915 | ||
2916 | if (set & TIOCM_RTS) | |
2917 | info->serial_signals |= SerialSignal_RTS; | |
2918 | if (set & TIOCM_DTR) | |
2919 | info->serial_signals |= SerialSignal_DTR; | |
2920 | if (clear & TIOCM_RTS) | |
2921 | info->serial_signals &= ~SerialSignal_RTS; | |
2922 | if (clear & TIOCM_DTR) | |
2923 | info->serial_signals &= ~SerialSignal_DTR; | |
2924 | ||
2925 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
2926 | usc_set_serial_signals(info); | |
2927 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
2928 | ||
2929 | return 0; | |
2930 | } | |
2931 | ||
2932 | /* mgsl_break() Set or clear transmit break condition | |
2933 | * | |
2934 | * Arguments: tty pointer to tty instance data | |
2935 | * break_state -1=set break condition, 0=clear | |
2936 | * Return Value: None | |
2937 | */ | |
2938 | static void mgsl_break(struct tty_struct *tty, int break_state) | |
2939 | { | |
2940 | struct mgsl_struct * info = (struct mgsl_struct *)tty->driver_data; | |
2941 | unsigned long flags; | |
2942 | ||
2943 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2944 | printk("%s(%d):mgsl_break(%s,%d)\n", | |
2945 | __FILE__,__LINE__, info->device_name, break_state); | |
2946 | ||
2947 | if (mgsl_paranoia_check(info, tty->name, "mgsl_break")) | |
2948 | return; | |
2949 | ||
2950 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
2951 | if (break_state == -1) | |
2952 | usc_OutReg(info,IOCR,(u16)(usc_InReg(info,IOCR) | BIT7)); | |
2953 | else | |
2954 | usc_OutReg(info,IOCR,(u16)(usc_InReg(info,IOCR) & ~BIT7)); | |
2955 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
2956 | ||
2957 | } /* end of mgsl_break() */ | |
2958 | ||
2959 | /* mgsl_ioctl() Service an IOCTL request | |
2960 | * | |
2961 | * Arguments: | |
2962 | * | |
2963 | * tty pointer to tty instance data | |
2964 | * file pointer to associated file object for device | |
2965 | * cmd IOCTL command code | |
2966 | * arg command argument/context | |
2967 | * | |
2968 | * Return Value: 0 if success, otherwise error code | |
2969 | */ | |
2970 | static int mgsl_ioctl(struct tty_struct *tty, struct file * file, | |
2971 | unsigned int cmd, unsigned long arg) | |
2972 | { | |
2973 | struct mgsl_struct * info = (struct mgsl_struct *)tty->driver_data; | |
2974 | ||
2975 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2976 | printk("%s(%d):mgsl_ioctl %s cmd=%08X\n", __FILE__,__LINE__, | |
2977 | info->device_name, cmd ); | |
2978 | ||
2979 | if (mgsl_paranoia_check(info, tty->name, "mgsl_ioctl")) | |
2980 | return -ENODEV; | |
2981 | ||
2982 | if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) && | |
2983 | (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) { | |
2984 | if (tty->flags & (1 << TTY_IO_ERROR)) | |
2985 | return -EIO; | |
2986 | } | |
2987 | ||
2988 | return mgsl_ioctl_common(info, cmd, arg); | |
2989 | } | |
2990 | ||
2991 | static int mgsl_ioctl_common(struct mgsl_struct *info, unsigned int cmd, unsigned long arg) | |
2992 | { | |
2993 | int error; | |
2994 | struct mgsl_icount cnow; /* kernel counter temps */ | |
2995 | void __user *argp = (void __user *)arg; | |
2996 | struct serial_icounter_struct __user *p_cuser; /* user space */ | |
2997 | unsigned long flags; | |
2998 | ||
2999 | switch (cmd) { | |
3000 | case MGSL_IOCGPARAMS: | |
3001 | return mgsl_get_params(info, argp); | |
3002 | case MGSL_IOCSPARAMS: | |
3003 | return mgsl_set_params(info, argp); | |
3004 | case MGSL_IOCGTXIDLE: | |
3005 | return mgsl_get_txidle(info, argp); | |
3006 | case MGSL_IOCSTXIDLE: | |
3007 | return mgsl_set_txidle(info,(int)arg); | |
3008 | case MGSL_IOCTXENABLE: | |
3009 | return mgsl_txenable(info,(int)arg); | |
3010 | case MGSL_IOCRXENABLE: | |
3011 | return mgsl_rxenable(info,(int)arg); | |
3012 | case MGSL_IOCTXABORT: | |
3013 | return mgsl_txabort(info); | |
3014 | case MGSL_IOCGSTATS: | |
3015 | return mgsl_get_stats(info, argp); | |
3016 | case MGSL_IOCWAITEVENT: | |
3017 | return mgsl_wait_event(info, argp); | |
3018 | case MGSL_IOCLOOPTXDONE: | |
3019 | return mgsl_loopmode_send_done(info); | |
3020 | /* Wait for modem input (DCD,RI,DSR,CTS) change | |
3021 | * as specified by mask in arg (TIOCM_RNG/DSR/CD/CTS) | |
3022 | */ | |
3023 | case TIOCMIWAIT: | |
3024 | return modem_input_wait(info,(int)arg); | |
3025 | ||
3026 | /* | |
3027 | * Get counter of input serial line interrupts (DCD,RI,DSR,CTS) | |
3028 | * Return: write counters to the user passed counter struct | |
3029 | * NB: both 1->0 and 0->1 transitions are counted except for | |
3030 | * RI where only 0->1 is counted. | |
3031 | */ | |
3032 | case TIOCGICOUNT: | |
3033 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
3034 | cnow = info->icount; | |
3035 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
3036 | p_cuser = argp; | |
3037 | PUT_USER(error,cnow.cts, &p_cuser->cts); | |
3038 | if (error) return error; | |
3039 | PUT_USER(error,cnow.dsr, &p_cuser->dsr); | |
3040 | if (error) return error; | |
3041 | PUT_USER(error,cnow.rng, &p_cuser->rng); | |
3042 | if (error) return error; | |
3043 | PUT_USER(error,cnow.dcd, &p_cuser->dcd); | |
3044 | if (error) return error; | |
3045 | PUT_USER(error,cnow.rx, &p_cuser->rx); | |
3046 | if (error) return error; | |
3047 | PUT_USER(error,cnow.tx, &p_cuser->tx); | |
3048 | if (error) return error; | |
3049 | PUT_USER(error,cnow.frame, &p_cuser->frame); | |
3050 | if (error) return error; | |
3051 | PUT_USER(error,cnow.overrun, &p_cuser->overrun); | |
3052 | if (error) return error; | |
3053 | PUT_USER(error,cnow.parity, &p_cuser->parity); | |
3054 | if (error) return error; | |
3055 | PUT_USER(error,cnow.brk, &p_cuser->brk); | |
3056 | if (error) return error; | |
3057 | PUT_USER(error,cnow.buf_overrun, &p_cuser->buf_overrun); | |
3058 | if (error) return error; | |
3059 | return 0; | |
3060 | default: | |
3061 | return -ENOIOCTLCMD; | |
3062 | } | |
3063 | return 0; | |
3064 | } | |
3065 | ||
3066 | /* mgsl_set_termios() | |
3067 | * | |
3068 | * Set new termios settings | |
3069 | * | |
3070 | * Arguments: | |
3071 | * | |
3072 | * tty pointer to tty structure | |
3073 | * termios pointer to buffer to hold returned old termios | |
3074 | * | |
3075 | * Return Value: None | |
3076 | */ | |
3077 | static void mgsl_set_termios(struct tty_struct *tty, struct termios *old_termios) | |
3078 | { | |
3079 | struct mgsl_struct *info = (struct mgsl_struct *)tty->driver_data; | |
3080 | unsigned long flags; | |
3081 | ||
3082 | if (debug_level >= DEBUG_LEVEL_INFO) | |
3083 | printk("%s(%d):mgsl_set_termios %s\n", __FILE__,__LINE__, | |
3084 | tty->driver->name ); | |
3085 | ||
3086 | /* just return if nothing has changed */ | |
3087 | if ((tty->termios->c_cflag == old_termios->c_cflag) | |
3088 | && (RELEVANT_IFLAG(tty->termios->c_iflag) | |
3089 | == RELEVANT_IFLAG(old_termios->c_iflag))) | |
3090 | return; | |
3091 | ||
3092 | mgsl_change_params(info); | |
3093 | ||
3094 | /* Handle transition to B0 status */ | |
3095 | if (old_termios->c_cflag & CBAUD && | |
3096 | !(tty->termios->c_cflag & CBAUD)) { | |
3097 | info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR); | |
3098 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
3099 | usc_set_serial_signals(info); | |
3100 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
3101 | } | |
3102 | ||
3103 | /* Handle transition away from B0 status */ | |
3104 | if (!(old_termios->c_cflag & CBAUD) && | |
3105 | tty->termios->c_cflag & CBAUD) { | |
3106 | info->serial_signals |= SerialSignal_DTR; | |
3107 | if (!(tty->termios->c_cflag & CRTSCTS) || | |
3108 | !test_bit(TTY_THROTTLED, &tty->flags)) { | |
3109 | info->serial_signals |= SerialSignal_RTS; | |
3110 | } | |
3111 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
3112 | usc_set_serial_signals(info); | |
3113 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
3114 | } | |
3115 | ||
3116 | /* Handle turning off CRTSCTS */ | |
3117 | if (old_termios->c_cflag & CRTSCTS && | |
3118 | !(tty->termios->c_cflag & CRTSCTS)) { | |
3119 | tty->hw_stopped = 0; | |
3120 | mgsl_start(tty); | |
3121 | } | |
3122 | ||
3123 | } /* end of mgsl_set_termios() */ | |
3124 | ||
3125 | /* mgsl_close() | |
3126 | * | |
3127 | * Called when port is closed. Wait for remaining data to be | |
3128 | * sent. Disable port and free resources. | |
3129 | * | |
3130 | * Arguments: | |
3131 | * | |
3132 | * tty pointer to open tty structure | |
3133 | * filp pointer to open file object | |
3134 | * | |
3135 | * Return Value: None | |
3136 | */ | |
3137 | static void mgsl_close(struct tty_struct *tty, struct file * filp) | |
3138 | { | |
3139 | struct mgsl_struct * info = (struct mgsl_struct *)tty->driver_data; | |
3140 | ||
3141 | if (mgsl_paranoia_check(info, tty->name, "mgsl_close")) | |
3142 | return; | |
3143 | ||
3144 | if (debug_level >= DEBUG_LEVEL_INFO) | |
3145 | printk("%s(%d):mgsl_close(%s) entry, count=%d\n", | |
3146 | __FILE__,__LINE__, info->device_name, info->count); | |
3147 | ||
3148 | if (!info->count) | |
3149 | return; | |
3150 | ||
3151 | if (tty_hung_up_p(filp)) | |
3152 | goto cleanup; | |
3153 | ||
3154 | if ((tty->count == 1) && (info->count != 1)) { | |
3155 | /* | |
3156 | * tty->count is 1 and the tty structure will be freed. | |
3157 | * info->count should be one in this case. | |
3158 | * if it's not, correct it so that the port is shutdown. | |
3159 | */ | |
3160 | printk("mgsl_close: bad refcount; tty->count is 1, " | |
3161 | "info->count is %d\n", info->count); | |
3162 | info->count = 1; | |
3163 | } | |
3164 | ||
3165 | info->count--; | |
3166 | ||
3167 | /* if at least one open remaining, leave hardware active */ | |
3168 | if (info->count) | |
3169 | goto cleanup; | |
3170 | ||
3171 | info->flags |= ASYNC_CLOSING; | |
3172 | ||
3173 | /* set tty->closing to notify line discipline to | |
3174 | * only process XON/XOFF characters. Only the N_TTY | |
3175 | * discipline appears to use this (ppp does not). | |
3176 | */ | |
3177 | tty->closing = 1; | |
3178 | ||
3179 | /* wait for transmit data to clear all layers */ | |
3180 | ||
3181 | if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE) { | |
3182 | if (debug_level >= DEBUG_LEVEL_INFO) | |
3183 | printk("%s(%d):mgsl_close(%s) calling tty_wait_until_sent\n", | |
3184 | __FILE__,__LINE__, info->device_name ); | |
3185 | tty_wait_until_sent(tty, info->closing_wait); | |
3186 | } | |
3187 | ||
3188 | if (info->flags & ASYNC_INITIALIZED) | |
3189 | mgsl_wait_until_sent(tty, info->timeout); | |
3190 | ||
3191 | if (tty->driver->flush_buffer) | |
3192 | tty->driver->flush_buffer(tty); | |
3193 | ||
3194 | tty_ldisc_flush(tty); | |
3195 | ||
3196 | shutdown(info); | |
3197 | ||
3198 | tty->closing = 0; | |
3199 | info->tty = NULL; | |
3200 | ||
3201 | if (info->blocked_open) { | |
3202 | if (info->close_delay) { | |
3203 | msleep_interruptible(jiffies_to_msecs(info->close_delay)); | |
3204 | } | |
3205 | wake_up_interruptible(&info->open_wait); | |
3206 | } | |
3207 | ||
3208 | info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING); | |
3209 | ||
3210 | wake_up_interruptible(&info->close_wait); | |
3211 | ||
3212 | cleanup: | |
3213 | if (debug_level >= DEBUG_LEVEL_INFO) | |
3214 | printk("%s(%d):mgsl_close(%s) exit, count=%d\n", __FILE__,__LINE__, | |
3215 | tty->driver->name, info->count); | |
3216 | ||
3217 | } /* end of mgsl_close() */ | |
3218 | ||
3219 | /* mgsl_wait_until_sent() | |
3220 | * | |
3221 | * Wait until the transmitter is empty. | |
3222 | * | |
3223 | * Arguments: | |
3224 | * | |
3225 | * tty pointer to tty info structure | |
3226 | * timeout time to wait for send completion | |
3227 | * | |
3228 | * Return Value: None | |
3229 | */ | |
3230 | static void mgsl_wait_until_sent(struct tty_struct *tty, int timeout) | |
3231 | { | |
3232 | struct mgsl_struct * info = (struct mgsl_struct *)tty->driver_data; | |
3233 | unsigned long orig_jiffies, char_time; | |
3234 | ||
3235 | if (!info ) | |
3236 | return; | |
3237 | ||
3238 | if (debug_level >= DEBUG_LEVEL_INFO) | |
3239 | printk("%s(%d):mgsl_wait_until_sent(%s) entry\n", | |
3240 | __FILE__,__LINE__, info->device_name ); | |
3241 | ||
3242 | if (mgsl_paranoia_check(info, tty->name, "mgsl_wait_until_sent")) | |
3243 | return; | |
3244 | ||
3245 | if (!(info->flags & ASYNC_INITIALIZED)) | |
3246 | goto exit; | |
3247 | ||
3248 | orig_jiffies = jiffies; | |
3249 | ||
3250 | /* Set check interval to 1/5 of estimated time to | |
3251 | * send a character, and make it at least 1. The check | |
3252 | * interval should also be less than the timeout. | |
3253 | * Note: use tight timings here to satisfy the NIST-PCTS. | |
3254 | */ | |
3255 | ||
3256 | if ( info->params.data_rate ) { | |
3257 | char_time = info->timeout/(32 * 5); | |
3258 | if (!char_time) | |
3259 | char_time++; | |
3260 | } else | |
3261 | char_time = 1; | |
3262 | ||
3263 | if (timeout) | |
3264 | char_time = min_t(unsigned long, char_time, timeout); | |
3265 | ||
3266 | if ( info->params.mode == MGSL_MODE_HDLC || | |
3267 | info->params.mode == MGSL_MODE_RAW ) { | |
3268 | while (info->tx_active) { | |
3269 | msleep_interruptible(jiffies_to_msecs(char_time)); | |
3270 | if (signal_pending(current)) | |
3271 | break; | |
3272 | if (timeout && time_after(jiffies, orig_jiffies + timeout)) | |
3273 | break; | |
3274 | } | |
3275 | } else { | |
3276 | while (!(usc_InReg(info,TCSR) & TXSTATUS_ALL_SENT) && | |
3277 | info->tx_enabled) { | |
3278 | msleep_interruptible(jiffies_to_msecs(char_time)); | |
3279 | if (signal_pending(current)) | |
3280 | break; | |
3281 | if (timeout && time_after(jiffies, orig_jiffies + timeout)) | |
3282 | break; | |
3283 | } | |
3284 | } | |
3285 | ||
3286 | exit: | |
3287 | if (debug_level >= DEBUG_LEVEL_INFO) | |
3288 | printk("%s(%d):mgsl_wait_until_sent(%s) exit\n", | |
3289 | __FILE__,__LINE__, info->device_name ); | |
3290 | ||
3291 | } /* end of mgsl_wait_until_sent() */ | |
3292 | ||
3293 | /* mgsl_hangup() | |
3294 | * | |
3295 | * Called by tty_hangup() when a hangup is signaled. | |
3296 | * This is the same as to closing all open files for the port. | |
3297 | * | |
3298 | * Arguments: tty pointer to associated tty object | |
3299 | * Return Value: None | |
3300 | */ | |
3301 | static void mgsl_hangup(struct tty_struct *tty) | |
3302 | { | |
3303 | struct mgsl_struct * info = (struct mgsl_struct *)tty->driver_data; | |
3304 | ||
3305 | if (debug_level >= DEBUG_LEVEL_INFO) | |
3306 | printk("%s(%d):mgsl_hangup(%s)\n", | |
3307 | __FILE__,__LINE__, info->device_name ); | |
3308 | ||
3309 | if (mgsl_paranoia_check(info, tty->name, "mgsl_hangup")) | |
3310 | return; | |
3311 | ||
3312 | mgsl_flush_buffer(tty); | |
3313 | shutdown(info); | |
3314 | ||
3315 | info->count = 0; | |
3316 | info->flags &= ~ASYNC_NORMAL_ACTIVE; | |
3317 | info->tty = NULL; | |
3318 | ||
3319 | wake_up_interruptible(&info->open_wait); | |
3320 | ||
3321 | } /* end of mgsl_hangup() */ | |
3322 | ||
3323 | /* block_til_ready() | |
3324 | * | |
3325 | * Block the current process until the specified port | |
3326 | * is ready to be opened. | |
3327 | * | |
3328 | * Arguments: | |
3329 | * | |
3330 | * tty pointer to tty info structure | |
3331 | * filp pointer to open file object | |
3332 | * info pointer to device instance data | |
3333 | * | |
3334 | * Return Value: 0 if success, otherwise error code | |
3335 | */ | |
3336 | static int block_til_ready(struct tty_struct *tty, struct file * filp, | |
3337 | struct mgsl_struct *info) | |
3338 | { | |
3339 | DECLARE_WAITQUEUE(wait, current); | |
3340 | int retval; | |
3341 | int do_clocal = 0, extra_count = 0; | |
3342 | unsigned long flags; | |
3343 | ||
3344 | if (debug_level >= DEBUG_LEVEL_INFO) | |
3345 | printk("%s(%d):block_til_ready on %s\n", | |
3346 | __FILE__,__LINE__, tty->driver->name ); | |
3347 | ||
3348 | if (filp->f_flags & O_NONBLOCK || tty->flags & (1 << TTY_IO_ERROR)){ | |
3349 | /* nonblock mode is set or port is not enabled */ | |
3350 | info->flags |= ASYNC_NORMAL_ACTIVE; | |
3351 | return 0; | |
3352 | } | |
3353 | ||
3354 | if (tty->termios->c_cflag & CLOCAL) | |
3355 | do_clocal = 1; | |
3356 | ||
3357 | /* Wait for carrier detect and the line to become | |
3358 | * free (i.e., not in use by the callout). While we are in | |
3359 | * this loop, info->count is dropped by one, so that | |
3360 | * mgsl_close() knows when to free things. We restore it upon | |
3361 | * exit, either normal or abnormal. | |
3362 | */ | |
3363 | ||
3364 | retval = 0; | |
3365 | add_wait_queue(&info->open_wait, &wait); | |
3366 | ||
3367 | if (debug_level >= DEBUG_LEVEL_INFO) | |
3368 | printk("%s(%d):block_til_ready before block on %s count=%d\n", | |
3369 | __FILE__,__LINE__, tty->driver->name, info->count ); | |
3370 | ||
3371 | spin_lock_irqsave(&info->irq_spinlock, flags); | |
3372 | if (!tty_hung_up_p(filp)) { | |
3373 | extra_count = 1; | |
3374 | info->count--; | |
3375 | } | |
3376 | spin_unlock_irqrestore(&info->irq_spinlock, flags); | |
3377 | info->blocked_open++; | |
3378 | ||
3379 | while (1) { | |
3380 | if (tty->termios->c_cflag & CBAUD) { | |
3381 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
3382 | info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR; | |
3383 | usc_set_serial_signals(info); | |
3384 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
3385 | } | |
3386 | ||
3387 | set_current_state(TASK_INTERRUPTIBLE); | |
3388 | ||
3389 | if (tty_hung_up_p(filp) || !(info->flags & ASYNC_INITIALIZED)){ | |
3390 | retval = (info->flags & ASYNC_HUP_NOTIFY) ? | |
3391 | -EAGAIN : -ERESTARTSYS; | |
3392 | break; | |
3393 | } | |
3394 | ||
3395 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
3396 | usc_get_serial_signals(info); | |
3397 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
3398 | ||
3399 | if (!(info->flags & ASYNC_CLOSING) && | |
3400 | (do_clocal || (info->serial_signals & SerialSignal_DCD)) ) { | |
3401 | break; | |
3402 | } | |
3403 | ||
3404 | if (signal_pending(current)) { | |
3405 | retval = -ERESTARTSYS; | |
3406 | break; | |
3407 | } | |
3408 | ||
3409 | if (debug_level >= DEBUG_LEVEL_INFO) | |
3410 | printk("%s(%d):block_til_ready blocking on %s count=%d\n", | |
3411 | __FILE__,__LINE__, tty->driver->name, info->count ); | |
3412 | ||
3413 | schedule(); | |
3414 | } | |
3415 | ||
3416 | set_current_state(TASK_RUNNING); | |
3417 | remove_wait_queue(&info->open_wait, &wait); | |
3418 | ||
3419 | if (extra_count) | |
3420 | info->count++; | |
3421 | info->blocked_open--; | |
3422 | ||
3423 | if (debug_level >= DEBUG_LEVEL_INFO) | |
3424 | printk("%s(%d):block_til_ready after blocking on %s count=%d\n", | |
3425 | __FILE__,__LINE__, tty->driver->name, info->count ); | |
3426 | ||
3427 | if (!retval) | |
3428 | info->flags |= ASYNC_NORMAL_ACTIVE; | |
3429 | ||
3430 | return retval; | |
3431 | ||
3432 | } /* end of block_til_ready() */ | |
3433 | ||
3434 | /* mgsl_open() | |
3435 | * | |
3436 | * Called when a port is opened. Init and enable port. | |
3437 | * Perform serial-specific initialization for the tty structure. | |
3438 | * | |
3439 | * Arguments: tty pointer to tty info structure | |
3440 | * filp associated file pointer | |
3441 | * | |
3442 | * Return Value: 0 if success, otherwise error code | |
3443 | */ | |
3444 | static int mgsl_open(struct tty_struct *tty, struct file * filp) | |
3445 | { | |
3446 | struct mgsl_struct *info; | |
3447 | int retval, line; | |
3448 | unsigned long page; | |
3449 | unsigned long flags; | |
3450 | ||
3451 | /* verify range of specified line number */ | |
3452 | line = tty->index; | |
3453 | if ((line < 0) || (line >= mgsl_device_count)) { | |
3454 | printk("%s(%d):mgsl_open with invalid line #%d.\n", | |
3455 | __FILE__,__LINE__,line); | |
3456 | return -ENODEV; | |
3457 | } | |
3458 | ||
3459 | /* find the info structure for the specified line */ | |
3460 | info = mgsl_device_list; | |
3461 | while(info && info->line != line) | |
3462 | info = info->next_device; | |
3463 | if (mgsl_paranoia_check(info, tty->name, "mgsl_open")) | |
3464 | return -ENODEV; | |
3465 | ||
3466 | tty->driver_data = info; | |
3467 | info->tty = tty; | |
3468 | ||
3469 | if (debug_level >= DEBUG_LEVEL_INFO) | |
3470 | printk("%s(%d):mgsl_open(%s), old ref count = %d\n", | |
3471 | __FILE__,__LINE__,tty->driver->name, info->count); | |
3472 | ||
3473 | /* If port is closing, signal caller to try again */ | |
3474 | if (tty_hung_up_p(filp) || info->flags & ASYNC_CLOSING){ | |
3475 | if (info->flags & ASYNC_CLOSING) | |
3476 | interruptible_sleep_on(&info->close_wait); | |
3477 | retval = ((info->flags & ASYNC_HUP_NOTIFY) ? | |
3478 | -EAGAIN : -ERESTARTSYS); | |
3479 | goto cleanup; | |
3480 | } | |
3481 | ||
3482 | if (!tmp_buf) { | |
3483 | page = get_zeroed_page(GFP_KERNEL); | |
3484 | if (!page) { | |
3485 | retval = -ENOMEM; | |
3486 | goto cleanup; | |
3487 | } | |
3488 | if (tmp_buf) | |
3489 | free_page(page); | |
3490 | else | |
3491 | tmp_buf = (unsigned char *) page; | |
3492 | } | |
3493 | ||
3494 | info->tty->low_latency = (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0; | |
3495 | ||
3496 | spin_lock_irqsave(&info->netlock, flags); | |
3497 | if (info->netcount) { | |
3498 | retval = -EBUSY; | |
3499 | spin_unlock_irqrestore(&info->netlock, flags); | |
3500 | goto cleanup; | |
3501 | } | |
3502 | info->count++; | |
3503 | spin_unlock_irqrestore(&info->netlock, flags); | |
3504 | ||
3505 | if (info->count == 1) { | |
3506 | /* 1st open on this device, init hardware */ | |
3507 | retval = startup(info); | |
3508 | if (retval < 0) | |
3509 | goto cleanup; | |
3510 | } | |
3511 | ||
3512 | retval = block_til_ready(tty, filp, info); | |
3513 | if (retval) { | |
3514 | if (debug_level >= DEBUG_LEVEL_INFO) | |
3515 | printk("%s(%d):block_til_ready(%s) returned %d\n", | |
3516 | __FILE__,__LINE__, info->device_name, retval); | |
3517 | goto cleanup; | |
3518 | } | |
3519 | ||
3520 | if (debug_level >= DEBUG_LEVEL_INFO) | |
3521 | printk("%s(%d):mgsl_open(%s) success\n", | |
3522 | __FILE__,__LINE__, info->device_name); | |
3523 | retval = 0; | |
3524 | ||
3525 | cleanup: | |
3526 | if (retval) { | |
3527 | if (tty->count == 1) | |
3528 | info->tty = NULL; /* tty layer will release tty struct */ | |
3529 | if(info->count) | |
3530 | info->count--; | |
3531 | } | |
3532 | ||
3533 | return retval; | |
3534 | ||
3535 | } /* end of mgsl_open() */ | |
3536 | ||
3537 | /* | |
3538 | * /proc fs routines.... | |
3539 | */ | |
3540 | ||
3541 | static inline int line_info(char *buf, struct mgsl_struct *info) | |
3542 | { | |
3543 | char stat_buf[30]; | |
3544 | int ret; | |
3545 | unsigned long flags; | |
3546 | ||
3547 | if (info->bus_type == MGSL_BUS_TYPE_PCI) { | |
3548 | ret = sprintf(buf, "%s:PCI io:%04X irq:%d mem:%08X lcr:%08X", | |
3549 | info->device_name, info->io_base, info->irq_level, | |
3550 | info->phys_memory_base, info->phys_lcr_base); | |
3551 | } else { | |
3552 | ret = sprintf(buf, "%s:(E)ISA io:%04X irq:%d dma:%d", | |
3553 | info->device_name, info->io_base, | |
3554 | info->irq_level, info->dma_level); | |
3555 | } | |
3556 | ||
3557 | /* output current serial signal states */ | |
3558 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
3559 | usc_get_serial_signals(info); | |
3560 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
3561 | ||
3562 | stat_buf[0] = 0; | |
3563 | stat_buf[1] = 0; | |
3564 | if (info->serial_signals & SerialSignal_RTS) | |
3565 | strcat(stat_buf, "|RTS"); | |
3566 | if (info->serial_signals & SerialSignal_CTS) | |
3567 | strcat(stat_buf, "|CTS"); | |
3568 | if (info->serial_signals & SerialSignal_DTR) | |
3569 | strcat(stat_buf, "|DTR"); | |
3570 | if (info->serial_signals & SerialSignal_DSR) | |
3571 | strcat(stat_buf, "|DSR"); | |
3572 | if (info->serial_signals & SerialSignal_DCD) | |
3573 | strcat(stat_buf, "|CD"); | |
3574 | if (info->serial_signals & SerialSignal_RI) | |
3575 | strcat(stat_buf, "|RI"); | |
3576 | ||
3577 | if (info->params.mode == MGSL_MODE_HDLC || | |
3578 | info->params.mode == MGSL_MODE_RAW ) { | |
3579 | ret += sprintf(buf+ret, " HDLC txok:%d rxok:%d", | |
3580 | info->icount.txok, info->icount.rxok); | |
3581 | if (info->icount.txunder) | |
3582 | ret += sprintf(buf+ret, " txunder:%d", info->icount.txunder); | |
3583 | if (info->icount.txabort) | |
3584 | ret += sprintf(buf+ret, " txabort:%d", info->icount.txabort); | |
3585 | if (info->icount.rxshort) | |
3586 | ret += sprintf(buf+ret, " rxshort:%d", info->icount.rxshort); | |
3587 | if (info->icount.rxlong) | |
3588 | ret += sprintf(buf+ret, " rxlong:%d", info->icount.rxlong); | |
3589 | if (info->icount.rxover) | |
3590 | ret += sprintf(buf+ret, " rxover:%d", info->icount.rxover); | |
3591 | if (info->icount.rxcrc) | |
3592 | ret += sprintf(buf+ret, " rxcrc:%d", info->icount.rxcrc); | |
3593 | } else { | |
3594 | ret += sprintf(buf+ret, " ASYNC tx:%d rx:%d", | |
3595 | info->icount.tx, info->icount.rx); | |
3596 | if (info->icount.frame) | |
3597 | ret += sprintf(buf+ret, " fe:%d", info->icount.frame); | |
3598 | if (info->icount.parity) | |
3599 | ret += sprintf(buf+ret, " pe:%d", info->icount.parity); | |
3600 | if (info->icount.brk) | |
3601 | ret += sprintf(buf+ret, " brk:%d", info->icount.brk); | |
3602 | if (info->icount.overrun) | |
3603 | ret += sprintf(buf+ret, " oe:%d", info->icount.overrun); | |
3604 | } | |
3605 | ||
3606 | /* Append serial signal status to end */ | |
3607 | ret += sprintf(buf+ret, " %s\n", stat_buf+1); | |
3608 | ||
3609 | ret += sprintf(buf+ret, "txactive=%d bh_req=%d bh_run=%d pending_bh=%x\n", | |
3610 | info->tx_active,info->bh_requested,info->bh_running, | |
3611 | info->pending_bh); | |
3612 | ||
3613 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
3614 | { | |
3615 | u16 Tcsr = usc_InReg( info, TCSR ); | |
3616 | u16 Tdmr = usc_InDmaReg( info, TDMR ); | |
3617 | u16 Ticr = usc_InReg( info, TICR ); | |
3618 | u16 Rscr = usc_InReg( info, RCSR ); | |
3619 | u16 Rdmr = usc_InDmaReg( info, RDMR ); | |
3620 | u16 Ricr = usc_InReg( info, RICR ); | |
3621 | u16 Icr = usc_InReg( info, ICR ); | |
3622 | u16 Dccr = usc_InReg( info, DCCR ); | |
3623 | u16 Tmr = usc_InReg( info, TMR ); | |
3624 | u16 Tccr = usc_InReg( info, TCCR ); | |
3625 | u16 Ccar = inw( info->io_base + CCAR ); | |
3626 | ret += sprintf(buf+ret, "tcsr=%04X tdmr=%04X ticr=%04X rcsr=%04X rdmr=%04X\n" | |
3627 | "ricr=%04X icr =%04X dccr=%04X tmr=%04X tccr=%04X ccar=%04X\n", | |
3628 | Tcsr,Tdmr,Ticr,Rscr,Rdmr,Ricr,Icr,Dccr,Tmr,Tccr,Ccar ); | |
3629 | } | |
3630 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
3631 | ||
3632 | return ret; | |
3633 | ||
3634 | } /* end of line_info() */ | |
3635 | ||
3636 | /* mgsl_read_proc() | |
3637 | * | |
3638 | * Called to print information about devices | |
3639 | * | |
3640 | * Arguments: | |
3641 | * page page of memory to hold returned info | |
3642 | * start | |
3643 | * off | |
3644 | * count | |
3645 | * eof | |
3646 | * data | |
3647 | * | |
3648 | * Return Value: | |
3649 | */ | |
3650 | static int mgsl_read_proc(char *page, char **start, off_t off, int count, | |
3651 | int *eof, void *data) | |
3652 | { | |
3653 | int len = 0, l; | |
3654 | off_t begin = 0; | |
3655 | struct mgsl_struct *info; | |
3656 | ||
3657 | len += sprintf(page, "synclink driver:%s\n", driver_version); | |
3658 | ||
3659 | info = mgsl_device_list; | |
3660 | while( info ) { | |
3661 | l = line_info(page + len, info); | |
3662 | len += l; | |
3663 | if (len+begin > off+count) | |
3664 | goto done; | |
3665 | if (len+begin < off) { | |
3666 | begin += len; | |
3667 | len = 0; | |
3668 | } | |
3669 | info = info->next_device; | |
3670 | } | |
3671 | ||
3672 | *eof = 1; | |
3673 | done: | |
3674 | if (off >= len+begin) | |
3675 | return 0; | |
3676 | *start = page + (off-begin); | |
3677 | return ((count < begin+len-off) ? count : begin+len-off); | |
3678 | ||
3679 | } /* end of mgsl_read_proc() */ | |
3680 | ||
3681 | /* mgsl_allocate_dma_buffers() | |
3682 | * | |
3683 | * Allocate and format DMA buffers (ISA adapter) | |
3684 | * or format shared memory buffers (PCI adapter). | |
3685 | * | |
3686 | * Arguments: info pointer to device instance data | |
3687 | * Return Value: 0 if success, otherwise error | |
3688 | */ | |
3689 | static int mgsl_allocate_dma_buffers(struct mgsl_struct *info) | |
3690 | { | |
3691 | unsigned short BuffersPerFrame; | |
3692 | ||
3693 | info->last_mem_alloc = 0; | |
3694 | ||
3695 | /* Calculate the number of DMA buffers necessary to hold the */ | |
3696 | /* largest allowable frame size. Note: If the max frame size is */ | |
3697 | /* not an even multiple of the DMA buffer size then we need to */ | |
3698 | /* round the buffer count per frame up one. */ | |
3699 | ||
3700 | BuffersPerFrame = (unsigned short)(info->max_frame_size/DMABUFFERSIZE); | |
3701 | if ( info->max_frame_size % DMABUFFERSIZE ) | |
3702 | BuffersPerFrame++; | |
3703 | ||
3704 | if ( info->bus_type == MGSL_BUS_TYPE_PCI ) { | |
3705 | /* | |
3706 | * The PCI adapter has 256KBytes of shared memory to use. | |
3707 | * This is 64 PAGE_SIZE buffers. | |
3708 | * | |
3709 | * The first page is used for padding at this time so the | |
3710 | * buffer list does not begin at offset 0 of the PCI | |
3711 | * adapter's shared memory. | |
3712 | * | |
3713 | * The 2nd page is used for the buffer list. A 4K buffer | |
3714 | * list can hold 128 DMA_BUFFER structures at 32 bytes | |
3715 | * each. | |
3716 | * | |
3717 | * This leaves 62 4K pages. | |
3718 | * | |
3719 | * The next N pages are used for transmit frame(s). We | |
3720 | * reserve enough 4K page blocks to hold the required | |
3721 | * number of transmit dma buffers (num_tx_dma_buffers), | |
3722 | * each of MaxFrameSize size. | |
3723 | * | |
3724 | * Of the remaining pages (62-N), determine how many can | |
3725 | * be used to receive full MaxFrameSize inbound frames | |
3726 | */ | |
3727 | info->tx_buffer_count = info->num_tx_dma_buffers * BuffersPerFrame; | |
3728 | info->rx_buffer_count = 62 - info->tx_buffer_count; | |
3729 | } else { | |
3730 | /* Calculate the number of PAGE_SIZE buffers needed for */ | |
3731 | /* receive and transmit DMA buffers. */ | |
3732 | ||
3733 | ||
3734 | /* Calculate the number of DMA buffers necessary to */ | |
3735 | /* hold 7 max size receive frames and one max size transmit frame. */ | |
3736 | /* The receive buffer count is bumped by one so we avoid an */ | |
3737 | /* End of List condition if all receive buffers are used when */ | |
3738 | /* using linked list DMA buffers. */ | |
3739 | ||
3740 | info->tx_buffer_count = info->num_tx_dma_buffers * BuffersPerFrame; | |
3741 | info->rx_buffer_count = (BuffersPerFrame * MAXRXFRAMES) + 6; | |
3742 | ||
3743 | /* | |
3744 | * limit total TxBuffers & RxBuffers to 62 4K total | |
3745 | * (ala PCI Allocation) | |
3746 | */ | |
3747 | ||
3748 | if ( (info->tx_buffer_count + info->rx_buffer_count) > 62 ) | |
3749 | info->rx_buffer_count = 62 - info->tx_buffer_count; | |
3750 | ||
3751 | } | |
3752 | ||
3753 | if ( debug_level >= DEBUG_LEVEL_INFO ) | |
3754 | printk("%s(%d):Allocating %d TX and %d RX DMA buffers.\n", | |
3755 | __FILE__,__LINE__, info->tx_buffer_count,info->rx_buffer_count); | |
3756 | ||
3757 | if ( mgsl_alloc_buffer_list_memory( info ) < 0 || | |
3758 | mgsl_alloc_frame_memory(info, info->rx_buffer_list, info->rx_buffer_count) < 0 || | |
3759 | mgsl_alloc_frame_memory(info, info->tx_buffer_list, info->tx_buffer_count) < 0 || | |
3760 | mgsl_alloc_intermediate_rxbuffer_memory(info) < 0 || | |
3761 | mgsl_alloc_intermediate_txbuffer_memory(info) < 0 ) { | |
3762 | printk("%s(%d):Can't allocate DMA buffer memory\n",__FILE__,__LINE__); | |
3763 | return -ENOMEM; | |
3764 | } | |
3765 | ||
3766 | mgsl_reset_rx_dma_buffers( info ); | |
3767 | mgsl_reset_tx_dma_buffers( info ); | |
3768 | ||
3769 | return 0; | |
3770 | ||
3771 | } /* end of mgsl_allocate_dma_buffers() */ | |
3772 | ||
3773 | /* | |
3774 | * mgsl_alloc_buffer_list_memory() | |
3775 | * | |
3776 | * Allocate a common DMA buffer for use as the | |
3777 | * receive and transmit buffer lists. | |
3778 | * | |
3779 | * A buffer list is a set of buffer entries where each entry contains | |
3780 | * a pointer to an actual buffer and a pointer to the next buffer entry | |
3781 | * (plus some other info about the buffer). | |
3782 | * | |
3783 | * The buffer entries for a list are built to form a circular list so | |
3784 | * that when the entire list has been traversed you start back at the | |
3785 | * beginning. | |
3786 | * | |
3787 | * This function allocates memory for just the buffer entries. | |
3788 | * The links (pointer to next entry) are filled in with the physical | |
3789 | * address of the next entry so the adapter can navigate the list | |
3790 | * using bus master DMA. The pointers to the actual buffers are filled | |
3791 | * out later when the actual buffers are allocated. | |
3792 | * | |
3793 | * Arguments: info pointer to device instance data | |
3794 | * Return Value: 0 if success, otherwise error | |
3795 | */ | |
3796 | static int mgsl_alloc_buffer_list_memory( struct mgsl_struct *info ) | |
3797 | { | |
3798 | unsigned int i; | |
3799 | ||
3800 | if ( info->bus_type == MGSL_BUS_TYPE_PCI ) { | |
3801 | /* PCI adapter uses shared memory. */ | |
3802 | info->buffer_list = info->memory_base + info->last_mem_alloc; | |
3803 | info->buffer_list_phys = info->last_mem_alloc; | |
3804 | info->last_mem_alloc += BUFFERLISTSIZE; | |
3805 | } else { | |
3806 | /* ISA adapter uses system memory. */ | |
3807 | /* The buffer lists are allocated as a common buffer that both */ | |
3808 | /* the processor and adapter can access. This allows the driver to */ | |
3809 | /* inspect portions of the buffer while other portions are being */ | |
3810 | /* updated by the adapter using Bus Master DMA. */ | |
3811 | ||
3812 | info->buffer_list = kmalloc(BUFFERLISTSIZE, GFP_KERNEL | GFP_DMA); | |
3813 | if ( info->buffer_list == NULL ) | |
3814 | return -ENOMEM; | |
3815 | ||
3816 | info->buffer_list_phys = isa_virt_to_bus(info->buffer_list); | |
3817 | } | |
3818 | ||
3819 | /* We got the memory for the buffer entry lists. */ | |
3820 | /* Initialize the memory block to all zeros. */ | |
3821 | memset( info->buffer_list, 0, BUFFERLISTSIZE ); | |
3822 | ||
3823 | /* Save virtual address pointers to the receive and */ | |
3824 | /* transmit buffer lists. (Receive 1st). These pointers will */ | |
3825 | /* be used by the processor to access the lists. */ | |
3826 | info->rx_buffer_list = (DMABUFFERENTRY *)info->buffer_list; | |
3827 | info->tx_buffer_list = (DMABUFFERENTRY *)info->buffer_list; | |
3828 | info->tx_buffer_list += info->rx_buffer_count; | |
3829 | ||
3830 | /* | |
3831 | * Build the links for the buffer entry lists such that | |
3832 | * two circular lists are built. (Transmit and Receive). | |
3833 | * | |
3834 | * Note: the links are physical addresses | |
3835 | * which are read by the adapter to determine the next | |
3836 | * buffer entry to use. | |
3837 | */ | |
3838 | ||
3839 | for ( i = 0; i < info->rx_buffer_count; i++ ) { | |
3840 | /* calculate and store physical address of this buffer entry */ | |
3841 | info->rx_buffer_list[i].phys_entry = | |
3842 | info->buffer_list_phys + (i * sizeof(DMABUFFERENTRY)); | |
3843 | ||
3844 | /* calculate and store physical address of */ | |
3845 | /* next entry in cirular list of entries */ | |
3846 | ||
3847 | info->rx_buffer_list[i].link = info->buffer_list_phys; | |
3848 | ||
3849 | if ( i < info->rx_buffer_count - 1 ) | |
3850 | info->rx_buffer_list[i].link += (i + 1) * sizeof(DMABUFFERENTRY); | |
3851 | } | |
3852 | ||
3853 | for ( i = 0; i < info->tx_buffer_count; i++ ) { | |
3854 | /* calculate and store physical address of this buffer entry */ | |
3855 | info->tx_buffer_list[i].phys_entry = info->buffer_list_phys + | |
3856 | ((info->rx_buffer_count + i) * sizeof(DMABUFFERENTRY)); | |
3857 | ||
3858 | /* calculate and store physical address of */ | |
3859 | /* next entry in cirular list of entries */ | |
3860 | ||
3861 | info->tx_buffer_list[i].link = info->buffer_list_phys + | |
3862 | info->rx_buffer_count * sizeof(DMABUFFERENTRY); | |
3863 | ||
3864 | if ( i < info->tx_buffer_count - 1 ) | |
3865 | info->tx_buffer_list[i].link += (i + 1) * sizeof(DMABUFFERENTRY); | |
3866 | } | |
3867 | ||
3868 | return 0; | |
3869 | ||
3870 | } /* end of mgsl_alloc_buffer_list_memory() */ | |
3871 | ||
3872 | /* Free DMA buffers allocated for use as the | |
3873 | * receive and transmit buffer lists. | |
3874 | * Warning: | |
3875 | * | |
3876 | * The data transfer buffers associated with the buffer list | |
3877 | * MUST be freed before freeing the buffer list itself because | |
3878 | * the buffer list contains the information necessary to free | |
3879 | * the individual buffers! | |
3880 | */ | |
3881 | static void mgsl_free_buffer_list_memory( struct mgsl_struct *info ) | |
3882 | { | |
3883 | if ( info->buffer_list && info->bus_type != MGSL_BUS_TYPE_PCI ) | |
3884 | kfree(info->buffer_list); | |
3885 | ||
3886 | info->buffer_list = NULL; | |
3887 | info->rx_buffer_list = NULL; | |
3888 | info->tx_buffer_list = NULL; | |
3889 | ||
3890 | } /* end of mgsl_free_buffer_list_memory() */ | |
3891 | ||
3892 | /* | |
3893 | * mgsl_alloc_frame_memory() | |
3894 | * | |
3895 | * Allocate the frame DMA buffers used by the specified buffer list. | |
3896 | * Each DMA buffer will be one memory page in size. This is necessary | |
3897 | * because memory can fragment enough that it may be impossible | |
3898 | * contiguous pages. | |
3899 | * | |
3900 | * Arguments: | |
3901 | * | |
3902 | * info pointer to device instance data | |
3903 | * BufferList pointer to list of buffer entries | |
3904 | * Buffercount count of buffer entries in buffer list | |
3905 | * | |
3906 | * Return Value: 0 if success, otherwise -ENOMEM | |
3907 | */ | |
3908 | static int mgsl_alloc_frame_memory(struct mgsl_struct *info,DMABUFFERENTRY *BufferList,int Buffercount) | |
3909 | { | |
3910 | int i; | |
3911 | unsigned long phys_addr; | |
3912 | ||
3913 | /* Allocate page sized buffers for the receive buffer list */ | |
3914 | ||
3915 | for ( i = 0; i < Buffercount; i++ ) { | |
3916 | if ( info->bus_type == MGSL_BUS_TYPE_PCI ) { | |
3917 | /* PCI adapter uses shared memory buffers. */ | |
3918 | BufferList[i].virt_addr = info->memory_base + info->last_mem_alloc; | |
3919 | phys_addr = info->last_mem_alloc; | |
3920 | info->last_mem_alloc += DMABUFFERSIZE; | |
3921 | } else { | |
3922 | /* ISA adapter uses system memory. */ | |
3923 | BufferList[i].virt_addr = | |
3924 | kmalloc(DMABUFFERSIZE, GFP_KERNEL | GFP_DMA); | |
3925 | if ( BufferList[i].virt_addr == NULL ) | |
3926 | return -ENOMEM; | |
3927 | phys_addr = isa_virt_to_bus(BufferList[i].virt_addr); | |
3928 | } | |
3929 | BufferList[i].phys_addr = phys_addr; | |
3930 | } | |
3931 | ||
3932 | return 0; | |
3933 | ||
3934 | } /* end of mgsl_alloc_frame_memory() */ | |
3935 | ||
3936 | /* | |
3937 | * mgsl_free_frame_memory() | |
3938 | * | |
3939 | * Free the buffers associated with | |
3940 | * each buffer entry of a buffer list. | |
3941 | * | |
3942 | * Arguments: | |
3943 | * | |
3944 | * info pointer to device instance data | |
3945 | * BufferList pointer to list of buffer entries | |
3946 | * Buffercount count of buffer entries in buffer list | |
3947 | * | |
3948 | * Return Value: None | |
3949 | */ | |
3950 | static void mgsl_free_frame_memory(struct mgsl_struct *info, DMABUFFERENTRY *BufferList, int Buffercount) | |
3951 | { | |
3952 | int i; | |
3953 | ||
3954 | if ( BufferList ) { | |
3955 | for ( i = 0 ; i < Buffercount ; i++ ) { | |
3956 | if ( BufferList[i].virt_addr ) { | |
3957 | if ( info->bus_type != MGSL_BUS_TYPE_PCI ) | |
3958 | kfree(BufferList[i].virt_addr); | |
3959 | BufferList[i].virt_addr = NULL; | |
3960 | } | |
3961 | } | |
3962 | } | |
3963 | ||
3964 | } /* end of mgsl_free_frame_memory() */ | |
3965 | ||
3966 | /* mgsl_free_dma_buffers() | |
3967 | * | |
3968 | * Free DMA buffers | |
3969 | * | |
3970 | * Arguments: info pointer to device instance data | |
3971 | * Return Value: None | |
3972 | */ | |
3973 | static void mgsl_free_dma_buffers( struct mgsl_struct *info ) | |
3974 | { | |
3975 | mgsl_free_frame_memory( info, info->rx_buffer_list, info->rx_buffer_count ); | |
3976 | mgsl_free_frame_memory( info, info->tx_buffer_list, info->tx_buffer_count ); | |
3977 | mgsl_free_buffer_list_memory( info ); | |
3978 | ||
3979 | } /* end of mgsl_free_dma_buffers() */ | |
3980 | ||
3981 | ||
3982 | /* | |
3983 | * mgsl_alloc_intermediate_rxbuffer_memory() | |
3984 | * | |
3985 | * Allocate a buffer large enough to hold max_frame_size. This buffer | |
3986 | * is used to pass an assembled frame to the line discipline. | |
3987 | * | |
3988 | * Arguments: | |
3989 | * | |
3990 | * info pointer to device instance data | |
3991 | * | |
3992 | * Return Value: 0 if success, otherwise -ENOMEM | |
3993 | */ | |
3994 | static int mgsl_alloc_intermediate_rxbuffer_memory(struct mgsl_struct *info) | |
3995 | { | |
3996 | info->intermediate_rxbuffer = kmalloc(info->max_frame_size, GFP_KERNEL | GFP_DMA); | |
3997 | if ( info->intermediate_rxbuffer == NULL ) | |
3998 | return -ENOMEM; | |
3999 | ||
4000 | return 0; | |
4001 | ||
4002 | } /* end of mgsl_alloc_intermediate_rxbuffer_memory() */ | |
4003 | ||
4004 | /* | |
4005 | * mgsl_free_intermediate_rxbuffer_memory() | |
4006 | * | |
4007 | * | |
4008 | * Arguments: | |
4009 | * | |
4010 | * info pointer to device instance data | |
4011 | * | |
4012 | * Return Value: None | |
4013 | */ | |
4014 | static void mgsl_free_intermediate_rxbuffer_memory(struct mgsl_struct *info) | |
4015 | { | |
4016 | if ( info->intermediate_rxbuffer ) | |
4017 | kfree(info->intermediate_rxbuffer); | |
4018 | ||
4019 | info->intermediate_rxbuffer = NULL; | |
4020 | ||
4021 | } /* end of mgsl_free_intermediate_rxbuffer_memory() */ | |
4022 | ||
4023 | /* | |
4024 | * mgsl_alloc_intermediate_txbuffer_memory() | |
4025 | * | |
4026 | * Allocate intermdiate transmit buffer(s) large enough to hold max_frame_size. | |
4027 | * This buffer is used to load transmit frames into the adapter's dma transfer | |
4028 | * buffers when there is sufficient space. | |
4029 | * | |
4030 | * Arguments: | |
4031 | * | |
4032 | * info pointer to device instance data | |
4033 | * | |
4034 | * Return Value: 0 if success, otherwise -ENOMEM | |
4035 | */ | |
4036 | static int mgsl_alloc_intermediate_txbuffer_memory(struct mgsl_struct *info) | |
4037 | { | |
4038 | int i; | |
4039 | ||
4040 | if ( debug_level >= DEBUG_LEVEL_INFO ) | |
4041 | printk("%s %s(%d) allocating %d tx holding buffers\n", | |
4042 | info->device_name, __FILE__,__LINE__,info->num_tx_holding_buffers); | |
4043 | ||
4044 | memset(info->tx_holding_buffers,0,sizeof(info->tx_holding_buffers)); | |
4045 | ||
4046 | for ( i=0; i<info->num_tx_holding_buffers; ++i) { | |
4047 | info->tx_holding_buffers[i].buffer = | |
4048 | kmalloc(info->max_frame_size, GFP_KERNEL); | |
4049 | if ( info->tx_holding_buffers[i].buffer == NULL ) | |
4050 | return -ENOMEM; | |
4051 | } | |
4052 | ||
4053 | return 0; | |
4054 | ||
4055 | } /* end of mgsl_alloc_intermediate_txbuffer_memory() */ | |
4056 | ||
4057 | /* | |
4058 | * mgsl_free_intermediate_txbuffer_memory() | |
4059 | * | |
4060 | * | |
4061 | * Arguments: | |
4062 | * | |
4063 | * info pointer to device instance data | |
4064 | * | |
4065 | * Return Value: None | |
4066 | */ | |
4067 | static void mgsl_free_intermediate_txbuffer_memory(struct mgsl_struct *info) | |
4068 | { | |
4069 | int i; | |
4070 | ||
4071 | for ( i=0; i<info->num_tx_holding_buffers; ++i ) { | |
4072 | if ( info->tx_holding_buffers[i].buffer ) { | |
4073 | kfree(info->tx_holding_buffers[i].buffer); | |
4074 | info->tx_holding_buffers[i].buffer=NULL; | |
4075 | } | |
4076 | } | |
4077 | ||
4078 | info->get_tx_holding_index = 0; | |
4079 | info->put_tx_holding_index = 0; | |
4080 | info->tx_holding_count = 0; | |
4081 | ||
4082 | } /* end of mgsl_free_intermediate_txbuffer_memory() */ | |
4083 | ||
4084 | ||
4085 | /* | |
4086 | * load_next_tx_holding_buffer() | |
4087 | * | |
4088 | * attempts to load the next buffered tx request into the | |
4089 | * tx dma buffers | |
4090 | * | |
4091 | * Arguments: | |
4092 | * | |
4093 | * info pointer to device instance data | |
4094 | * | |
4095 | * Return Value: 1 if next buffered tx request loaded | |
4096 | * into adapter's tx dma buffer, | |
4097 | * 0 otherwise | |
4098 | */ | |
4099 | static int load_next_tx_holding_buffer(struct mgsl_struct *info) | |
4100 | { | |
4101 | int ret = 0; | |
4102 | ||
4103 | if ( info->tx_holding_count ) { | |
4104 | /* determine if we have enough tx dma buffers | |
4105 | * to accommodate the next tx frame | |
4106 | */ | |
4107 | struct tx_holding_buffer *ptx = | |
4108 | &info->tx_holding_buffers[info->get_tx_holding_index]; | |
4109 | int num_free = num_free_tx_dma_buffers(info); | |
4110 | int num_needed = ptx->buffer_size / DMABUFFERSIZE; | |
4111 | if ( ptx->buffer_size % DMABUFFERSIZE ) | |
4112 | ++num_needed; | |
4113 | ||
4114 | if (num_needed <= num_free) { | |
4115 | info->xmit_cnt = ptx->buffer_size; | |
4116 | mgsl_load_tx_dma_buffer(info,ptx->buffer,ptx->buffer_size); | |
4117 | ||
4118 | --info->tx_holding_count; | |
4119 | if ( ++info->get_tx_holding_index >= info->num_tx_holding_buffers) | |
4120 | info->get_tx_holding_index=0; | |
4121 | ||
4122 | /* restart transmit timer */ | |
4123 | mod_timer(&info->tx_timer, jiffies + msecs_to_jiffies(5000)); | |
4124 | ||
4125 | ret = 1; | |
4126 | } | |
4127 | } | |
4128 | ||
4129 | return ret; | |
4130 | } | |
4131 | ||
4132 | /* | |
4133 | * save_tx_buffer_request() | |
4134 | * | |
4135 | * attempt to store transmit frame request for later transmission | |
4136 | * | |
4137 | * Arguments: | |
4138 | * | |
4139 | * info pointer to device instance data | |
4140 | * Buffer pointer to buffer containing frame to load | |
4141 | * BufferSize size in bytes of frame in Buffer | |
4142 | * | |
4143 | * Return Value: 1 if able to store, 0 otherwise | |
4144 | */ | |
4145 | static int save_tx_buffer_request(struct mgsl_struct *info,const char *Buffer, unsigned int BufferSize) | |
4146 | { | |
4147 | struct tx_holding_buffer *ptx; | |
4148 | ||
4149 | if ( info->tx_holding_count >= info->num_tx_holding_buffers ) { | |
4150 | return 0; /* all buffers in use */ | |
4151 | } | |
4152 | ||
4153 | ptx = &info->tx_holding_buffers[info->put_tx_holding_index]; | |
4154 | ptx->buffer_size = BufferSize; | |
4155 | memcpy( ptx->buffer, Buffer, BufferSize); | |
4156 | ||
4157 | ++info->tx_holding_count; | |
4158 | if ( ++info->put_tx_holding_index >= info->num_tx_holding_buffers) | |
4159 | info->put_tx_holding_index=0; | |
4160 | ||
4161 | return 1; | |
4162 | } | |
4163 | ||
4164 | static int mgsl_claim_resources(struct mgsl_struct *info) | |
4165 | { | |
4166 | if (request_region(info->io_base,info->io_addr_size,"synclink") == NULL) { | |
4167 | printk( "%s(%d):I/O address conflict on device %s Addr=%08X\n", | |
4168 | __FILE__,__LINE__,info->device_name, info->io_base); | |
4169 | return -ENODEV; | |
4170 | } | |
4171 | info->io_addr_requested = 1; | |
4172 | ||
4173 | if ( request_irq(info->irq_level,mgsl_interrupt,info->irq_flags, | |
4174 | info->device_name, info ) < 0 ) { | |
4175 | printk( "%s(%d):Cant request interrupt on device %s IRQ=%d\n", | |
4176 | __FILE__,__LINE__,info->device_name, info->irq_level ); | |
4177 | goto errout; | |
4178 | } | |
4179 | info->irq_requested = 1; | |
4180 | ||
4181 | if ( info->bus_type == MGSL_BUS_TYPE_PCI ) { | |
4182 | if (request_mem_region(info->phys_memory_base,0x40000,"synclink") == NULL) { | |
4183 | printk( "%s(%d):mem addr conflict device %s Addr=%08X\n", | |
4184 | __FILE__,__LINE__,info->device_name, info->phys_memory_base); | |
4185 | goto errout; | |
4186 | } | |
4187 | info->shared_mem_requested = 1; | |
4188 | if (request_mem_region(info->phys_lcr_base + info->lcr_offset,128,"synclink") == NULL) { | |
4189 | printk( "%s(%d):lcr mem addr conflict device %s Addr=%08X\n", | |
4190 | __FILE__,__LINE__,info->device_name, info->phys_lcr_base + info->lcr_offset); | |
4191 | goto errout; | |
4192 | } | |
4193 | info->lcr_mem_requested = 1; | |
4194 | ||
4195 | info->memory_base = ioremap(info->phys_memory_base,0x40000); | |
4196 | if (!info->memory_base) { | |
4197 | printk( "%s(%d):Cant map shared memory on device %s MemAddr=%08X\n", | |
4198 | __FILE__,__LINE__,info->device_name, info->phys_memory_base ); | |
4199 | goto errout; | |
4200 | } | |
4201 | ||
4202 | if ( !mgsl_memory_test(info) ) { | |
4203 | printk( "%s(%d):Failed shared memory test %s MemAddr=%08X\n", | |
4204 | __FILE__,__LINE__,info->device_name, info->phys_memory_base ); | |
4205 | goto errout; | |
4206 | } | |
4207 | ||
4208 | info->lcr_base = ioremap(info->phys_lcr_base,PAGE_SIZE) + info->lcr_offset; | |
4209 | if (!info->lcr_base) { | |
4210 | printk( "%s(%d):Cant map LCR memory on device %s MemAddr=%08X\n", | |
4211 | __FILE__,__LINE__,info->device_name, info->phys_lcr_base ); | |
4212 | goto errout; | |
4213 | } | |
4214 | ||
4215 | } else { | |
4216 | /* claim DMA channel */ | |
4217 | ||
4218 | if (request_dma(info->dma_level,info->device_name) < 0){ | |
4219 | printk( "%s(%d):Cant request DMA channel on device %s DMA=%d\n", | |
4220 | __FILE__,__LINE__,info->device_name, info->dma_level ); | |
4221 | mgsl_release_resources( info ); | |
4222 | return -ENODEV; | |
4223 | } | |
4224 | info->dma_requested = 1; | |
4225 | ||
4226 | /* ISA adapter uses bus master DMA */ | |
4227 | set_dma_mode(info->dma_level,DMA_MODE_CASCADE); | |
4228 | enable_dma(info->dma_level); | |
4229 | } | |
4230 | ||
4231 | if ( mgsl_allocate_dma_buffers(info) < 0 ) { | |
4232 | printk( "%s(%d):Cant allocate DMA buffers on device %s DMA=%d\n", | |
4233 | __FILE__,__LINE__,info->device_name, info->dma_level ); | |
4234 | goto errout; | |
4235 | } | |
4236 | ||
4237 | return 0; | |
4238 | errout: | |
4239 | mgsl_release_resources(info); | |
4240 | return -ENODEV; | |
4241 | ||
4242 | } /* end of mgsl_claim_resources() */ | |
4243 | ||
4244 | static void mgsl_release_resources(struct mgsl_struct *info) | |
4245 | { | |
4246 | if ( debug_level >= DEBUG_LEVEL_INFO ) | |
4247 | printk( "%s(%d):mgsl_release_resources(%s) entry\n", | |
4248 | __FILE__,__LINE__,info->device_name ); | |
4249 | ||
4250 | if ( info->irq_requested ) { | |
4251 | free_irq(info->irq_level, info); | |
4252 | info->irq_requested = 0; | |
4253 | } | |
4254 | if ( info->dma_requested ) { | |
4255 | disable_dma(info->dma_level); | |
4256 | free_dma(info->dma_level); | |
4257 | info->dma_requested = 0; | |
4258 | } | |
4259 | mgsl_free_dma_buffers(info); | |
4260 | mgsl_free_intermediate_rxbuffer_memory(info); | |
4261 | mgsl_free_intermediate_txbuffer_memory(info); | |
4262 | ||
4263 | if ( info->io_addr_requested ) { | |
4264 | release_region(info->io_base,info->io_addr_size); | |
4265 | info->io_addr_requested = 0; | |
4266 | } | |
4267 | if ( info->shared_mem_requested ) { | |
4268 | release_mem_region(info->phys_memory_base,0x40000); | |
4269 | info->shared_mem_requested = 0; | |
4270 | } | |
4271 | if ( info->lcr_mem_requested ) { | |
4272 | release_mem_region(info->phys_lcr_base + info->lcr_offset,128); | |
4273 | info->lcr_mem_requested = 0; | |
4274 | } | |
4275 | if (info->memory_base){ | |
4276 | iounmap(info->memory_base); | |
4277 | info->memory_base = NULL; | |
4278 | } | |
4279 | if (info->lcr_base){ | |
4280 | iounmap(info->lcr_base - info->lcr_offset); | |
4281 | info->lcr_base = NULL; | |
4282 | } | |
4283 | ||
4284 | if ( debug_level >= DEBUG_LEVEL_INFO ) | |
4285 | printk( "%s(%d):mgsl_release_resources(%s) exit\n", | |
4286 | __FILE__,__LINE__,info->device_name ); | |
4287 | ||
4288 | } /* end of mgsl_release_resources() */ | |
4289 | ||
4290 | /* mgsl_add_device() | |
4291 | * | |
4292 | * Add the specified device instance data structure to the | |
4293 | * global linked list of devices and increment the device count. | |
4294 | * | |
4295 | * Arguments: info pointer to device instance data | |
4296 | * Return Value: None | |
4297 | */ | |
4298 | static void mgsl_add_device( struct mgsl_struct *info ) | |
4299 | { | |
4300 | info->next_device = NULL; | |
4301 | info->line = mgsl_device_count; | |
4302 | sprintf(info->device_name,"ttySL%d",info->line); | |
4303 | ||
4304 | if (info->line < MAX_TOTAL_DEVICES) { | |
4305 | if (maxframe[info->line]) | |
4306 | info->max_frame_size = maxframe[info->line]; | |
4307 | info->dosyncppp = dosyncppp[info->line]; | |
4308 | ||
4309 | if (txdmabufs[info->line]) { | |
4310 | info->num_tx_dma_buffers = txdmabufs[info->line]; | |
4311 | if (info->num_tx_dma_buffers < 1) | |
4312 | info->num_tx_dma_buffers = 1; | |
4313 | } | |
4314 | ||
4315 | if (txholdbufs[info->line]) { | |
4316 | info->num_tx_holding_buffers = txholdbufs[info->line]; | |
4317 | if (info->num_tx_holding_buffers < 1) | |
4318 | info->num_tx_holding_buffers = 1; | |
4319 | else if (info->num_tx_holding_buffers > MAX_TX_HOLDING_BUFFERS) | |
4320 | info->num_tx_holding_buffers = MAX_TX_HOLDING_BUFFERS; | |
4321 | } | |
4322 | } | |
4323 | ||
4324 | mgsl_device_count++; | |
4325 | ||
4326 | if ( !mgsl_device_list ) | |
4327 | mgsl_device_list = info; | |
4328 | else { | |
4329 | struct mgsl_struct *current_dev = mgsl_device_list; | |
4330 | while( current_dev->next_device ) | |
4331 | current_dev = current_dev->next_device; | |
4332 | current_dev->next_device = info; | |
4333 | } | |
4334 | ||
4335 | if ( info->max_frame_size < 4096 ) | |
4336 | info->max_frame_size = 4096; | |
4337 | else if ( info->max_frame_size > 65535 ) | |
4338 | info->max_frame_size = 65535; | |
4339 | ||
4340 | if ( info->bus_type == MGSL_BUS_TYPE_PCI ) { | |
4341 | printk( "SyncLink PCI v%d %s: IO=%04X IRQ=%d Mem=%08X,%08X MaxFrameSize=%u\n", | |
4342 | info->hw_version + 1, info->device_name, info->io_base, info->irq_level, | |
4343 | info->phys_memory_base, info->phys_lcr_base, | |
4344 | info->max_frame_size ); | |
4345 | } else { | |
4346 | printk( "SyncLink ISA %s: IO=%04X IRQ=%d DMA=%d MaxFrameSize=%u\n", | |
4347 | info->device_name, info->io_base, info->irq_level, info->dma_level, | |
4348 | info->max_frame_size ); | |
4349 | } | |
4350 | ||
4351 | #ifdef CONFIG_HDLC | |
4352 | hdlcdev_init(info); | |
4353 | #endif | |
4354 | ||
4355 | } /* end of mgsl_add_device() */ | |
4356 | ||
4357 | /* mgsl_allocate_device() | |
4358 | * | |
4359 | * Allocate and initialize a device instance structure | |
4360 | * | |
4361 | * Arguments: none | |
4362 | * Return Value: pointer to mgsl_struct if success, otherwise NULL | |
4363 | */ | |
4364 | static struct mgsl_struct* mgsl_allocate_device(void) | |
4365 | { | |
4366 | struct mgsl_struct *info; | |
4367 | ||
4368 | info = (struct mgsl_struct *)kmalloc(sizeof(struct mgsl_struct), | |
4369 | GFP_KERNEL); | |
4370 | ||
4371 | if (!info) { | |
4372 | printk("Error can't allocate device instance data\n"); | |
4373 | } else { | |
4374 | memset(info, 0, sizeof(struct mgsl_struct)); | |
4375 | info->magic = MGSL_MAGIC; | |
4376 | INIT_WORK(&info->task, mgsl_bh_handler, info); | |
4377 | info->max_frame_size = 4096; | |
4378 | info->close_delay = 5*HZ/10; | |
4379 | info->closing_wait = 30*HZ; | |
4380 | init_waitqueue_head(&info->open_wait); | |
4381 | init_waitqueue_head(&info->close_wait); | |
4382 | init_waitqueue_head(&info->status_event_wait_q); | |
4383 | init_waitqueue_head(&info->event_wait_q); | |
4384 | spin_lock_init(&info->irq_spinlock); | |
4385 | spin_lock_init(&info->netlock); | |
4386 | memcpy(&info->params,&default_params,sizeof(MGSL_PARAMS)); | |
4387 | info->idle_mode = HDLC_TXIDLE_FLAGS; | |
4388 | info->num_tx_dma_buffers = 1; | |
4389 | info->num_tx_holding_buffers = 0; | |
4390 | } | |
4391 | ||
4392 | return info; | |
4393 | ||
4394 | } /* end of mgsl_allocate_device()*/ | |
4395 | ||
4396 | static struct tty_operations mgsl_ops = { | |
4397 | .open = mgsl_open, | |
4398 | .close = mgsl_close, | |
4399 | .write = mgsl_write, | |
4400 | .put_char = mgsl_put_char, | |
4401 | .flush_chars = mgsl_flush_chars, | |
4402 | .write_room = mgsl_write_room, | |
4403 | .chars_in_buffer = mgsl_chars_in_buffer, | |
4404 | .flush_buffer = mgsl_flush_buffer, | |
4405 | .ioctl = mgsl_ioctl, | |
4406 | .throttle = mgsl_throttle, | |
4407 | .unthrottle = mgsl_unthrottle, | |
4408 | .send_xchar = mgsl_send_xchar, | |
4409 | .break_ctl = mgsl_break, | |
4410 | .wait_until_sent = mgsl_wait_until_sent, | |
4411 | .read_proc = mgsl_read_proc, | |
4412 | .set_termios = mgsl_set_termios, | |
4413 | .stop = mgsl_stop, | |
4414 | .start = mgsl_start, | |
4415 | .hangup = mgsl_hangup, | |
4416 | .tiocmget = tiocmget, | |
4417 | .tiocmset = tiocmset, | |
4418 | }; | |
4419 | ||
4420 | /* | |
4421 | * perform tty device initialization | |
4422 | */ | |
4423 | static int mgsl_init_tty(void) | |
4424 | { | |
4425 | int rc; | |
4426 | ||
4427 | serial_driver = alloc_tty_driver(128); | |
4428 | if (!serial_driver) | |
4429 | return -ENOMEM; | |
4430 | ||
4431 | serial_driver->owner = THIS_MODULE; | |
4432 | serial_driver->driver_name = "synclink"; | |
4433 | serial_driver->name = "ttySL"; | |
4434 | serial_driver->major = ttymajor; | |
4435 | serial_driver->minor_start = 64; | |
4436 | serial_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
4437 | serial_driver->subtype = SERIAL_TYPE_NORMAL; | |
4438 | serial_driver->init_termios = tty_std_termios; | |
4439 | serial_driver->init_termios.c_cflag = | |
4440 | B9600 | CS8 | CREAD | HUPCL | CLOCAL; | |
4441 | serial_driver->flags = TTY_DRIVER_REAL_RAW; | |
4442 | tty_set_operations(serial_driver, &mgsl_ops); | |
4443 | if ((rc = tty_register_driver(serial_driver)) < 0) { | |
4444 | printk("%s(%d):Couldn't register serial driver\n", | |
4445 | __FILE__,__LINE__); | |
4446 | put_tty_driver(serial_driver); | |
4447 | serial_driver = NULL; | |
4448 | return rc; | |
4449 | } | |
4450 | ||
4451 | printk("%s %s, tty major#%d\n", | |
4452 | driver_name, driver_version, | |
4453 | serial_driver->major); | |
4454 | return 0; | |
4455 | } | |
4456 | ||
4457 | /* enumerate user specified ISA adapters | |
4458 | */ | |
4459 | static void mgsl_enum_isa_devices(void) | |
4460 | { | |
4461 | struct mgsl_struct *info; | |
4462 | int i; | |
4463 | ||
4464 | /* Check for user specified ISA devices */ | |
4465 | ||
4466 | for (i=0 ;(i < MAX_ISA_DEVICES) && io[i] && irq[i]; i++){ | |
4467 | if ( debug_level >= DEBUG_LEVEL_INFO ) | |
4468 | printk("ISA device specified io=%04X,irq=%d,dma=%d\n", | |
4469 | io[i], irq[i], dma[i] ); | |
4470 | ||
4471 | info = mgsl_allocate_device(); | |
4472 | if ( !info ) { | |
4473 | /* error allocating device instance data */ | |
4474 | if ( debug_level >= DEBUG_LEVEL_ERROR ) | |
4475 | printk( "can't allocate device instance data.\n"); | |
4476 | continue; | |
4477 | } | |
4478 | ||
4479 | /* Copy user configuration info to device instance data */ | |
4480 | info->io_base = (unsigned int)io[i]; | |
4481 | info->irq_level = (unsigned int)irq[i]; | |
4482 | info->irq_level = irq_canonicalize(info->irq_level); | |
4483 | info->dma_level = (unsigned int)dma[i]; | |
4484 | info->bus_type = MGSL_BUS_TYPE_ISA; | |
4485 | info->io_addr_size = 16; | |
4486 | info->irq_flags = 0; | |
4487 | ||
4488 | mgsl_add_device( info ); | |
4489 | } | |
4490 | } | |
4491 | ||
4492 | static void synclink_cleanup(void) | |
4493 | { | |
4494 | int rc; | |
4495 | struct mgsl_struct *info; | |
4496 | struct mgsl_struct *tmp; | |
4497 | ||
4498 | printk("Unloading %s: %s\n", driver_name, driver_version); | |
4499 | ||
4500 | if (serial_driver) { | |
4501 | if ((rc = tty_unregister_driver(serial_driver))) | |
4502 | printk("%s(%d) failed to unregister tty driver err=%d\n", | |
4503 | __FILE__,__LINE__,rc); | |
4504 | put_tty_driver(serial_driver); | |
4505 | } | |
4506 | ||
4507 | info = mgsl_device_list; | |
4508 | while(info) { | |
4509 | #ifdef CONFIG_HDLC | |
4510 | hdlcdev_exit(info); | |
4511 | #endif | |
4512 | mgsl_release_resources(info); | |
4513 | tmp = info; | |
4514 | info = info->next_device; | |
4515 | kfree(tmp); | |
4516 | } | |
4517 | ||
4518 | if (tmp_buf) { | |
4519 | free_page((unsigned long) tmp_buf); | |
4520 | tmp_buf = NULL; | |
4521 | } | |
4522 | ||
4523 | if (pci_registered) | |
4524 | pci_unregister_driver(&synclink_pci_driver); | |
4525 | } | |
4526 | ||
4527 | static int __init synclink_init(void) | |
4528 | { | |
4529 | int rc; | |
4530 | ||
4531 | if (break_on_load) { | |
4532 | mgsl_get_text_ptr(); | |
4533 | BREAKPOINT(); | |
4534 | } | |
4535 | ||
4536 | printk("%s %s\n", driver_name, driver_version); | |
4537 | ||
4538 | mgsl_enum_isa_devices(); | |
4539 | if ((rc = pci_register_driver(&synclink_pci_driver)) < 0) | |
4540 | printk("%s:failed to register PCI driver, error=%d\n",__FILE__,rc); | |
4541 | else | |
4542 | pci_registered = 1; | |
4543 | ||
4544 | if ((rc = mgsl_init_tty()) < 0) | |
4545 | goto error; | |
4546 | ||
4547 | return 0; | |
4548 | ||
4549 | error: | |
4550 | synclink_cleanup(); | |
4551 | return rc; | |
4552 | } | |
4553 | ||
4554 | static void __exit synclink_exit(void) | |
4555 | { | |
4556 | synclink_cleanup(); | |
4557 | } | |
4558 | ||
4559 | module_init(synclink_init); | |
4560 | module_exit(synclink_exit); | |
4561 | ||
4562 | /* | |
4563 | * usc_RTCmd() | |
4564 | * | |
4565 | * Issue a USC Receive/Transmit command to the | |
4566 | * Channel Command/Address Register (CCAR). | |
4567 | * | |
4568 | * Notes: | |
4569 | * | |
4570 | * The command is encoded in the most significant 5 bits <15..11> | |
4571 | * of the CCAR value. Bits <10..7> of the CCAR must be preserved | |
4572 | * and Bits <6..0> must be written as zeros. | |
4573 | * | |
4574 | * Arguments: | |
4575 | * | |
4576 | * info pointer to device information structure | |
4577 | * Cmd command mask (use symbolic macros) | |
4578 | * | |
4579 | * Return Value: | |
4580 | * | |
4581 | * None | |
4582 | */ | |
4583 | static void usc_RTCmd( struct mgsl_struct *info, u16 Cmd ) | |
4584 | { | |
4585 | /* output command to CCAR in bits <15..11> */ | |
4586 | /* preserve bits <10..7>, bits <6..0> must be zero */ | |
4587 | ||
4588 | outw( Cmd + info->loopback_bits, info->io_base + CCAR ); | |
4589 | ||
4590 | /* Read to flush write to CCAR */ | |
4591 | if ( info->bus_type == MGSL_BUS_TYPE_PCI ) | |
4592 | inw( info->io_base + CCAR ); | |
4593 | ||
4594 | } /* end of usc_RTCmd() */ | |
4595 | ||
4596 | /* | |
4597 | * usc_DmaCmd() | |
4598 | * | |
4599 | * Issue a DMA command to the DMA Command/Address Register (DCAR). | |
4600 | * | |
4601 | * Arguments: | |
4602 | * | |
4603 | * info pointer to device information structure | |
4604 | * Cmd DMA command mask (usc_DmaCmd_XX Macros) | |
4605 | * | |
4606 | * Return Value: | |
4607 | * | |
4608 | * None | |
4609 | */ | |
4610 | static void usc_DmaCmd( struct mgsl_struct *info, u16 Cmd ) | |
4611 | { | |
4612 | /* write command mask to DCAR */ | |
4613 | outw( Cmd + info->mbre_bit, info->io_base ); | |
4614 | ||
4615 | /* Read to flush write to DCAR */ | |
4616 | if ( info->bus_type == MGSL_BUS_TYPE_PCI ) | |
4617 | inw( info->io_base ); | |
4618 | ||
4619 | } /* end of usc_DmaCmd() */ | |
4620 | ||
4621 | /* | |
4622 | * usc_OutDmaReg() | |
4623 | * | |
4624 | * Write a 16-bit value to a USC DMA register | |
4625 | * | |
4626 | * Arguments: | |
4627 | * | |
4628 | * info pointer to device info structure | |
4629 | * RegAddr register address (number) for write | |
4630 | * RegValue 16-bit value to write to register | |
4631 | * | |
4632 | * Return Value: | |
4633 | * | |
4634 | * None | |
4635 | * | |
4636 | */ | |
4637 | static void usc_OutDmaReg( struct mgsl_struct *info, u16 RegAddr, u16 RegValue ) | |
4638 | { | |
4639 | /* Note: The DCAR is located at the adapter base address */ | |
4640 | /* Note: must preserve state of BIT8 in DCAR */ | |
4641 | ||
4642 | outw( RegAddr + info->mbre_bit, info->io_base ); | |
4643 | outw( RegValue, info->io_base ); | |
4644 | ||
4645 | /* Read to flush write to DCAR */ | |
4646 | if ( info->bus_type == MGSL_BUS_TYPE_PCI ) | |
4647 | inw( info->io_base ); | |
4648 | ||
4649 | } /* end of usc_OutDmaReg() */ | |
4650 | ||
4651 | /* | |
4652 | * usc_InDmaReg() | |
4653 | * | |
4654 | * Read a 16-bit value from a DMA register | |
4655 | * | |
4656 | * Arguments: | |
4657 | * | |
4658 | * info pointer to device info structure | |
4659 | * RegAddr register address (number) to read from | |
4660 | * | |
4661 | * Return Value: | |
4662 | * | |
4663 | * The 16-bit value read from register | |
4664 | * | |
4665 | */ | |
4666 | static u16 usc_InDmaReg( struct mgsl_struct *info, u16 RegAddr ) | |
4667 | { | |
4668 | /* Note: The DCAR is located at the adapter base address */ | |
4669 | /* Note: must preserve state of BIT8 in DCAR */ | |
4670 | ||
4671 | outw( RegAddr + info->mbre_bit, info->io_base ); | |
4672 | return inw( info->io_base ); | |
4673 | ||
4674 | } /* end of usc_InDmaReg() */ | |
4675 | ||
4676 | /* | |
4677 | * | |
4678 | * usc_OutReg() | |
4679 | * | |
4680 | * Write a 16-bit value to a USC serial channel register | |
4681 | * | |
4682 | * Arguments: | |
4683 | * | |
4684 | * info pointer to device info structure | |
4685 | * RegAddr register address (number) to write to | |
4686 | * RegValue 16-bit value to write to register | |
4687 | * | |
4688 | * Return Value: | |
4689 | * | |
4690 | * None | |
4691 | * | |
4692 | */ | |
4693 | static void usc_OutReg( struct mgsl_struct *info, u16 RegAddr, u16 RegValue ) | |
4694 | { | |
4695 | outw( RegAddr + info->loopback_bits, info->io_base + CCAR ); | |
4696 | outw( RegValue, info->io_base + CCAR ); | |
4697 | ||
4698 | /* Read to flush write to CCAR */ | |
4699 | if ( info->bus_type == MGSL_BUS_TYPE_PCI ) | |
4700 | inw( info->io_base + CCAR ); | |
4701 | ||
4702 | } /* end of usc_OutReg() */ | |
4703 | ||
4704 | /* | |
4705 | * usc_InReg() | |
4706 | * | |
4707 | * Reads a 16-bit value from a USC serial channel register | |
4708 | * | |
4709 | * Arguments: | |
4710 | * | |
4711 | * info pointer to device extension | |
4712 | * RegAddr register address (number) to read from | |
4713 | * | |
4714 | * Return Value: | |
4715 | * | |
4716 | * 16-bit value read from register | |
4717 | */ | |
4718 | static u16 usc_InReg( struct mgsl_struct *info, u16 RegAddr ) | |
4719 | { | |
4720 | outw( RegAddr + info->loopback_bits, info->io_base + CCAR ); | |
4721 | return inw( info->io_base + CCAR ); | |
4722 | ||
4723 | } /* end of usc_InReg() */ | |
4724 | ||
4725 | /* usc_set_sdlc_mode() | |
4726 | * | |
4727 | * Set up the adapter for SDLC DMA communications. | |
4728 | * | |
4729 | * Arguments: info pointer to device instance data | |
4730 | * Return Value: NONE | |
4731 | */ | |
4732 | static void usc_set_sdlc_mode( struct mgsl_struct *info ) | |
4733 | { | |
4734 | u16 RegValue; | |
4735 | int PreSL1660; | |
4736 | ||
4737 | /* | |
4738 | * determine if the IUSC on the adapter is pre-SL1660. If | |
4739 | * not, take advantage of the UnderWait feature of more | |
4740 | * modern chips. If an underrun occurs and this bit is set, | |
4741 | * the transmitter will idle the programmed idle pattern | |
4742 | * until the driver has time to service the underrun. Otherwise, | |
4743 | * the dma controller may get the cycles previously requested | |
4744 | * and begin transmitting queued tx data. | |
4745 | */ | |
4746 | usc_OutReg(info,TMCR,0x1f); | |
4747 | RegValue=usc_InReg(info,TMDR); | |
4748 | if ( RegValue == IUSC_PRE_SL1660 ) | |
4749 | PreSL1660 = 1; | |
4750 | else | |
4751 | PreSL1660 = 0; | |
4752 | ||
4753 | ||
4754 | if ( info->params.flags & HDLC_FLAG_HDLC_LOOPMODE ) | |
4755 | { | |
4756 | /* | |
4757 | ** Channel Mode Register (CMR) | |
4758 | ** | |
4759 | ** <15..14> 10 Tx Sub Modes, Send Flag on Underrun | |
4760 | ** <13> 0 0 = Transmit Disabled (initially) | |
4761 | ** <12> 0 1 = Consecutive Idles share common 0 | |
4762 | ** <11..8> 1110 Transmitter Mode = HDLC/SDLC Loop | |
4763 | ** <7..4> 0000 Rx Sub Modes, addr/ctrl field handling | |
4764 | ** <3..0> 0110 Receiver Mode = HDLC/SDLC | |
4765 | ** | |
4766 | ** 1000 1110 0000 0110 = 0x8e06 | |
4767 | */ | |
4768 | RegValue = 0x8e06; | |
4769 | ||
4770 | /*-------------------------------------------------- | |
4771 | * ignore user options for UnderRun Actions and | |
4772 | * preambles | |
4773 | *--------------------------------------------------*/ | |
4774 | } | |
4775 | else | |
4776 | { | |
4777 | /* Channel mode Register (CMR) | |
4778 | * | |
4779 | * <15..14> 00 Tx Sub modes, Underrun Action | |
4780 | * <13> 0 1 = Send Preamble before opening flag | |
4781 | * <12> 0 1 = Consecutive Idles share common 0 | |
4782 | * <11..8> 0110 Transmitter mode = HDLC/SDLC | |
4783 | * <7..4> 0000 Rx Sub modes, addr/ctrl field handling | |
4784 | * <3..0> 0110 Receiver mode = HDLC/SDLC | |
4785 | * | |
4786 | * 0000 0110 0000 0110 = 0x0606 | |
4787 | */ | |
4788 | if (info->params.mode == MGSL_MODE_RAW) { | |
4789 | RegValue = 0x0001; /* Set Receive mode = external sync */ | |
4790 | ||
4791 | usc_OutReg( info, IOCR, /* Set IOCR DCD is RxSync Detect Input */ | |
4792 | (unsigned short)((usc_InReg(info, IOCR) & ~(BIT13|BIT12)) | BIT12)); | |
4793 | ||
4794 | /* | |
4795 | * TxSubMode: | |
4796 | * CMR <15> 0 Don't send CRC on Tx Underrun | |
4797 | * CMR <14> x undefined | |
4798 | * CMR <13> 0 Send preamble before openning sync | |
4799 | * CMR <12> 0 Send 8-bit syncs, 1=send Syncs per TxLength | |
4800 | * | |
4801 | * TxMode: | |
4802 | * CMR <11-8) 0100 MonoSync | |
4803 | * | |
4804 | * 0x00 0100 xxxx xxxx 04xx | |
4805 | */ | |
4806 | RegValue |= 0x0400; | |
4807 | } | |
4808 | else { | |
4809 | ||
4810 | RegValue = 0x0606; | |
4811 | ||
4812 | if ( info->params.flags & HDLC_FLAG_UNDERRUN_ABORT15 ) | |
4813 | RegValue |= BIT14; | |
4814 | else if ( info->params.flags & HDLC_FLAG_UNDERRUN_FLAG ) | |
4815 | RegValue |= BIT15; | |
4816 | else if ( info->params.flags & HDLC_FLAG_UNDERRUN_CRC ) | |
4817 | RegValue |= BIT15 + BIT14; | |
4818 | } | |
4819 | ||
4820 | if ( info->params.preamble != HDLC_PREAMBLE_PATTERN_NONE ) | |
4821 | RegValue |= BIT13; | |
4822 | } | |
4823 | ||
4824 | if ( info->params.mode == MGSL_MODE_HDLC && | |
4825 | (info->params.flags & HDLC_FLAG_SHARE_ZERO) ) | |
4826 | RegValue |= BIT12; | |
4827 | ||
4828 | if ( info->params.addr_filter != 0xff ) | |
4829 | { | |
4830 | /* set up receive address filtering */ | |
4831 | usc_OutReg( info, RSR, info->params.addr_filter ); | |
4832 | RegValue |= BIT4; | |
4833 | } | |
4834 | ||
4835 | usc_OutReg( info, CMR, RegValue ); | |
4836 | info->cmr_value = RegValue; | |
4837 | ||
4838 | /* Receiver mode Register (RMR) | |
4839 | * | |
4840 | * <15..13> 000 encoding | |
4841 | * <12..11> 00 FCS = 16bit CRC CCITT (x15 + x12 + x5 + 1) | |
4842 | * <10> 1 1 = Set CRC to all 1s (use for SDLC/HDLC) | |
4843 | * <9> 0 1 = Include Receive chars in CRC | |
4844 | * <8> 1 1 = Use Abort/PE bit as abort indicator | |
4845 | * <7..6> 00 Even parity | |
4846 | * <5> 0 parity disabled | |
4847 | * <4..2> 000 Receive Char Length = 8 bits | |
4848 | * <1..0> 00 Disable Receiver | |
4849 | * | |
4850 | * 0000 0101 0000 0000 = 0x0500 | |
4851 | */ | |
4852 | ||
4853 | RegValue = 0x0500; | |
4854 | ||
4855 | switch ( info->params.encoding ) { | |
4856 | case HDLC_ENCODING_NRZB: RegValue |= BIT13; break; | |
4857 | case HDLC_ENCODING_NRZI_MARK: RegValue |= BIT14; break; | |
4858 | case HDLC_ENCODING_NRZI_SPACE: RegValue |= BIT14 + BIT13; break; | |
4859 | case HDLC_ENCODING_BIPHASE_MARK: RegValue |= BIT15; break; | |
4860 | case HDLC_ENCODING_BIPHASE_SPACE: RegValue |= BIT15 + BIT13; break; | |
4861 | case HDLC_ENCODING_BIPHASE_LEVEL: RegValue |= BIT15 + BIT14; break; | |
4862 | case HDLC_ENCODING_DIFF_BIPHASE_LEVEL: RegValue |= BIT15 + BIT14 + BIT13; break; | |
4863 | } | |
4864 | ||
4865 | if ( (info->params.crc_type & HDLC_CRC_MASK) == HDLC_CRC_16_CCITT ) | |
4866 | RegValue |= BIT9; | |
4867 | else if ( (info->params.crc_type & HDLC_CRC_MASK) == HDLC_CRC_32_CCITT ) | |
4868 | RegValue |= ( BIT12 | BIT10 | BIT9 ); | |
4869 | ||
4870 | usc_OutReg( info, RMR, RegValue ); | |
4871 | ||
4872 | /* Set the Receive count Limit Register (RCLR) to 0xffff. */ | |
4873 | /* When an opening flag of an SDLC frame is recognized the */ | |
4874 | /* Receive Character count (RCC) is loaded with the value in */ | |
4875 | /* RCLR. The RCC is decremented for each received byte. The */ | |
4876 | /* value of RCC is stored after the closing flag of the frame */ | |
4877 | /* allowing the frame size to be computed. */ | |
4878 | ||
4879 | usc_OutReg( info, RCLR, RCLRVALUE ); | |
4880 | ||
4881 | usc_RCmd( info, RCmd_SelectRicrdma_level ); | |
4882 | ||
4883 | /* Receive Interrupt Control Register (RICR) | |
4884 | * | |
4885 | * <15..8> ? RxFIFO DMA Request Level | |
4886 | * <7> 0 Exited Hunt IA (Interrupt Arm) | |
4887 | * <6> 0 Idle Received IA | |
4888 | * <5> 0 Break/Abort IA | |
4889 | * <4> 0 Rx Bound IA | |
4890 | * <3> 1 Queued status reflects oldest 2 bytes in FIFO | |
4891 | * <2> 0 Abort/PE IA | |
4892 | * <1> 1 Rx Overrun IA | |
4893 | * <0> 0 Select TC0 value for readback | |
4894 | * | |
4895 | * 0000 0000 0000 1000 = 0x000a | |
4896 | */ | |
4897 | ||
4898 | /* Carry over the Exit Hunt and Idle Received bits */ | |
4899 | /* in case they have been armed by usc_ArmEvents. */ | |
4900 | ||
4901 | RegValue = usc_InReg( info, RICR ) & 0xc0; | |
4902 | ||
4903 | if ( info->bus_type == MGSL_BUS_TYPE_PCI ) | |
4904 | usc_OutReg( info, RICR, (u16)(0x030a | RegValue) ); | |
4905 | else | |
4906 | usc_OutReg( info, RICR, (u16)(0x140a | RegValue) ); | |
4907 | ||
4908 | /* Unlatch all Rx status bits and clear Rx status IRQ Pending */ | |
4909 | ||
4910 | usc_UnlatchRxstatusBits( info, RXSTATUS_ALL ); | |
4911 | usc_ClearIrqPendingBits( info, RECEIVE_STATUS ); | |
4912 | ||
4913 | /* Transmit mode Register (TMR) | |
4914 | * | |
4915 | * <15..13> 000 encoding | |
4916 | * <12..11> 00 FCS = 16bit CRC CCITT (x15 + x12 + x5 + 1) | |
4917 | * <10> 1 1 = Start CRC as all 1s (use for SDLC/HDLC) | |
4918 | * <9> 0 1 = Tx CRC Enabled | |
4919 | * <8> 0 1 = Append CRC to end of transmit frame | |
4920 | * <7..6> 00 Transmit parity Even | |
4921 | * <5> 0 Transmit parity Disabled | |
4922 | * <4..2> 000 Tx Char Length = 8 bits | |
4923 | * <1..0> 00 Disable Transmitter | |
4924 | * | |
4925 | * 0000 0100 0000 0000 = 0x0400 | |
4926 | */ | |
4927 | ||
4928 | RegValue = 0x0400; | |
4929 | ||
4930 | switch ( info->params.encoding ) { | |
4931 | case HDLC_ENCODING_NRZB: RegValue |= BIT13; break; | |
4932 | case HDLC_ENCODING_NRZI_MARK: RegValue |= BIT14; break; | |
4933 | case HDLC_ENCODING_NRZI_SPACE: RegValue |= BIT14 + BIT13; break; | |
4934 | case HDLC_ENCODING_BIPHASE_MARK: RegValue |= BIT15; break; | |
4935 | case HDLC_ENCODING_BIPHASE_SPACE: RegValue |= BIT15 + BIT13; break; | |
4936 | case HDLC_ENCODING_BIPHASE_LEVEL: RegValue |= BIT15 + BIT14; break; | |
4937 | case HDLC_ENCODING_DIFF_BIPHASE_LEVEL: RegValue |= BIT15 + BIT14 + BIT13; break; | |
4938 | } | |
4939 | ||
4940 | if ( (info->params.crc_type & HDLC_CRC_MASK) == HDLC_CRC_16_CCITT ) | |
4941 | RegValue |= BIT9 + BIT8; | |
4942 | else if ( (info->params.crc_type & HDLC_CRC_MASK) == HDLC_CRC_32_CCITT ) | |
4943 | RegValue |= ( BIT12 | BIT10 | BIT9 | BIT8); | |
4944 | ||
4945 | usc_OutReg( info, TMR, RegValue ); | |
4946 | ||
4947 | usc_set_txidle( info ); | |
4948 | ||
4949 | ||
4950 | usc_TCmd( info, TCmd_SelectTicrdma_level ); | |
4951 | ||
4952 | /* Transmit Interrupt Control Register (TICR) | |
4953 | * | |
4954 | * <15..8> ? Transmit FIFO DMA Level | |
4955 | * <7> 0 Present IA (Interrupt Arm) | |
4956 | * <6> 0 Idle Sent IA | |
4957 | * <5> 1 Abort Sent IA | |
4958 | * <4> 1 EOF/EOM Sent IA | |
4959 | * <3> 0 CRC Sent IA | |
4960 | * <2> 1 1 = Wait for SW Trigger to Start Frame | |
4961 | * <1> 1 Tx Underrun IA | |
4962 | * <0> 0 TC0 constant on read back | |
4963 | * | |
4964 | * 0000 0000 0011 0110 = 0x0036 | |
4965 | */ | |
4966 | ||
4967 | if ( info->bus_type == MGSL_BUS_TYPE_PCI ) | |
4968 | usc_OutReg( info, TICR, 0x0736 ); | |
4969 | else | |
4970 | usc_OutReg( info, TICR, 0x1436 ); | |
4971 | ||
4972 | usc_UnlatchTxstatusBits( info, TXSTATUS_ALL ); | |
4973 | usc_ClearIrqPendingBits( info, TRANSMIT_STATUS ); | |
4974 | ||
4975 | /* | |
4976 | ** Transmit Command/Status Register (TCSR) | |
4977 | ** | |
4978 | ** <15..12> 0000 TCmd | |
4979 | ** <11> 0/1 UnderWait | |
4980 | ** <10..08> 000 TxIdle | |
4981 | ** <7> x PreSent | |
4982 | ** <6> x IdleSent | |
4983 | ** <5> x AbortSent | |
4984 | ** <4> x EOF/EOM Sent | |
4985 | ** <3> x CRC Sent | |
4986 | ** <2> x All Sent | |
4987 | ** <1> x TxUnder | |
4988 | ** <0> x TxEmpty | |
4989 | ** | |
4990 | ** 0000 0000 0000 0000 = 0x0000 | |
4991 | */ | |
4992 | info->tcsr_value = 0; | |
4993 | ||
4994 | if ( !PreSL1660 ) | |
4995 | info->tcsr_value |= TCSR_UNDERWAIT; | |
4996 | ||
4997 | usc_OutReg( info, TCSR, info->tcsr_value ); | |
4998 | ||
4999 | /* Clock mode Control Register (CMCR) | |
5000 | * | |
5001 | * <15..14> 00 counter 1 Source = Disabled | |
5002 | * <13..12> 00 counter 0 Source = Disabled | |
5003 | * <11..10> 11 BRG1 Input is TxC Pin | |
5004 | * <9..8> 11 BRG0 Input is TxC Pin | |
5005 | * <7..6> 01 DPLL Input is BRG1 Output | |
5006 | * <5..3> XXX TxCLK comes from Port 0 | |
5007 | * <2..0> XXX RxCLK comes from Port 1 | |
5008 | * | |
5009 | * 0000 1111 0111 0111 = 0x0f77 | |
5010 | */ | |
5011 | ||
5012 | RegValue = 0x0f40; | |
5013 | ||
5014 | if ( info->params.flags & HDLC_FLAG_RXC_DPLL ) | |
5015 | RegValue |= 0x0003; /* RxCLK from DPLL */ | |
5016 | else if ( info->params.flags & HDLC_FLAG_RXC_BRG ) | |
5017 | RegValue |= 0x0004; /* RxCLK from BRG0 */ | |
5018 | else if ( info->params.flags & HDLC_FLAG_RXC_TXCPIN) | |
5019 | RegValue |= 0x0006; /* RxCLK from TXC Input */ | |
5020 | else | |
5021 | RegValue |= 0x0007; /* RxCLK from Port1 */ | |
5022 | ||
5023 | if ( info->params.flags & HDLC_FLAG_TXC_DPLL ) | |
5024 | RegValue |= 0x0018; /* TxCLK from DPLL */ | |
5025 | else if ( info->params.flags & HDLC_FLAG_TXC_BRG ) | |
5026 | RegValue |= 0x0020; /* TxCLK from BRG0 */ | |
5027 | else if ( info->params.flags & HDLC_FLAG_TXC_RXCPIN) | |
5028 | RegValue |= 0x0038; /* RxCLK from TXC Input */ | |
5029 | else | |
5030 | RegValue |= 0x0030; /* TxCLK from Port0 */ | |
5031 | ||
5032 | usc_OutReg( info, CMCR, RegValue ); | |
5033 | ||
5034 | ||
5035 | /* Hardware Configuration Register (HCR) | |
5036 | * | |
5037 | * <15..14> 00 CTR0 Divisor:00=32,01=16,10=8,11=4 | |
5038 | * <13> 0 CTR1DSel:0=CTR0Div determines CTR0Div | |
5039 | * <12> 0 CVOK:0=report code violation in biphase | |
5040 | * <11..10> 00 DPLL Divisor:00=32,01=16,10=8,11=4 | |
5041 | * <9..8> XX DPLL mode:00=disable,01=NRZ,10=Biphase,11=Biphase Level | |
5042 | * <7..6> 00 reserved | |
5043 | * <5> 0 BRG1 mode:0=continuous,1=single cycle | |
5044 | * <4> X BRG1 Enable | |
5045 | * <3..2> 00 reserved | |
5046 | * <1> 0 BRG0 mode:0=continuous,1=single cycle | |
5047 | * <0> 0 BRG0 Enable | |
5048 | */ | |
5049 | ||
5050 | RegValue = 0x0000; | |
5051 | ||
5052 | if ( info->params.flags & (HDLC_FLAG_RXC_DPLL + HDLC_FLAG_TXC_DPLL) ) { | |
5053 | u32 XtalSpeed; | |
5054 | u32 DpllDivisor; | |
5055 | u16 Tc; | |
5056 | ||
5057 | /* DPLL is enabled. Use BRG1 to provide continuous reference clock */ | |
5058 | /* for DPLL. DPLL mode in HCR is dependent on the encoding used. */ | |
5059 | ||
5060 | if ( info->bus_type == MGSL_BUS_TYPE_PCI ) | |
5061 | XtalSpeed = 11059200; | |
5062 | else | |
5063 | XtalSpeed = 14745600; | |
5064 | ||
5065 | if ( info->params.flags & HDLC_FLAG_DPLL_DIV16 ) { | |
5066 | DpllDivisor = 16; | |
5067 | RegValue |= BIT10; | |
5068 | } | |
5069 | else if ( info->params.flags & HDLC_FLAG_DPLL_DIV8 ) { | |
5070 | DpllDivisor = 8; | |
5071 | RegValue |= BIT11; | |
5072 | } | |
5073 | else | |
5074 | DpllDivisor = 32; | |
5075 | ||
5076 | /* Tc = (Xtal/Speed) - 1 */ | |
5077 | /* If twice the remainder of (Xtal/Speed) is greater than Speed */ | |
5078 | /* then rounding up gives a more precise time constant. Instead */ | |
5079 | /* of rounding up and then subtracting 1 we just don't subtract */ | |
5080 | /* the one in this case. */ | |
5081 | ||
5082 | /*-------------------------------------------------- | |
5083 | * ejz: for DPLL mode, application should use the | |
5084 | * same clock speed as the partner system, even | |
5085 | * though clocking is derived from the input RxData. | |
5086 | * In case the user uses a 0 for the clock speed, | |
5087 | * default to 0xffffffff and don't try to divide by | |
5088 | * zero | |
5089 | *--------------------------------------------------*/ | |
5090 | if ( info->params.clock_speed ) | |
5091 | { | |
5092 | Tc = (u16)((XtalSpeed/DpllDivisor)/info->params.clock_speed); | |
5093 | if ( !((((XtalSpeed/DpllDivisor) % info->params.clock_speed) * 2) | |
5094 | / info->params.clock_speed) ) | |
5095 | Tc--; | |
5096 | } | |
5097 | else | |
5098 | Tc = -1; | |
5099 | ||
5100 | ||
5101 | /* Write 16-bit Time Constant for BRG1 */ | |
5102 | usc_OutReg( info, TC1R, Tc ); | |
5103 | ||
5104 | RegValue |= BIT4; /* enable BRG1 */ | |
5105 | ||
5106 | switch ( info->params.encoding ) { | |
5107 | case HDLC_ENCODING_NRZ: | |
5108 | case HDLC_ENCODING_NRZB: | |
5109 | case HDLC_ENCODING_NRZI_MARK: | |
5110 | case HDLC_ENCODING_NRZI_SPACE: RegValue |= BIT8; break; | |
5111 | case HDLC_ENCODING_BIPHASE_MARK: | |
5112 | case HDLC_ENCODING_BIPHASE_SPACE: RegValue |= BIT9; break; | |
5113 | case HDLC_ENCODING_BIPHASE_LEVEL: | |
5114 | case HDLC_ENCODING_DIFF_BIPHASE_LEVEL: RegValue |= BIT9 + BIT8; break; | |
5115 | } | |
5116 | } | |
5117 | ||
5118 | usc_OutReg( info, HCR, RegValue ); | |
5119 | ||
5120 | ||
5121 | /* Channel Control/status Register (CCSR) | |
5122 | * | |
5123 | * <15> X RCC FIFO Overflow status (RO) | |
5124 | * <14> X RCC FIFO Not Empty status (RO) | |
5125 | * <13> 0 1 = Clear RCC FIFO (WO) | |
5126 | * <12> X DPLL Sync (RW) | |
5127 | * <11> X DPLL 2 Missed Clocks status (RO) | |
5128 | * <10> X DPLL 1 Missed Clock status (RO) | |
5129 | * <9..8> 00 DPLL Resync on rising and falling edges (RW) | |
5130 | * <7> X SDLC Loop On status (RO) | |
5131 | * <6> X SDLC Loop Send status (RO) | |
5132 | * <5> 1 Bypass counters for TxClk and RxClk (RW) | |
5133 | * <4..2> 000 Last Char of SDLC frame has 8 bits (RW) | |
5134 | * <1..0> 00 reserved | |
5135 | * | |
5136 | * 0000 0000 0010 0000 = 0x0020 | |
5137 | */ | |
5138 | ||
5139 | usc_OutReg( info, CCSR, 0x1020 ); | |
5140 | ||
5141 | ||
5142 | if ( info->params.flags & HDLC_FLAG_AUTO_CTS ) { | |
5143 | usc_OutReg( info, SICR, | |
5144 | (u16)(usc_InReg(info,SICR) | SICR_CTS_INACTIVE) ); | |
5145 | } | |
5146 | ||
5147 | ||
5148 | /* enable Master Interrupt Enable bit (MIE) */ | |
5149 | usc_EnableMasterIrqBit( info ); | |
5150 | ||
5151 | usc_ClearIrqPendingBits( info, RECEIVE_STATUS + RECEIVE_DATA + | |
5152 | TRANSMIT_STATUS + TRANSMIT_DATA + MISC); | |
5153 | ||
5154 | /* arm RCC underflow interrupt */ | |
5155 | usc_OutReg(info, SICR, (u16)(usc_InReg(info,SICR) | BIT3)); | |
5156 | usc_EnableInterrupts(info, MISC); | |
5157 | ||
5158 | info->mbre_bit = 0; | |
5159 | outw( 0, info->io_base ); /* clear Master Bus Enable (DCAR) */ | |
5160 | usc_DmaCmd( info, DmaCmd_ResetAllChannels ); /* disable both DMA channels */ | |
5161 | info->mbre_bit = BIT8; | |
5162 | outw( BIT8, info->io_base ); /* set Master Bus Enable (DCAR) */ | |
5163 | ||
5164 | if (info->bus_type == MGSL_BUS_TYPE_ISA) { | |
5165 | /* Enable DMAEN (Port 7, Bit 14) */ | |
5166 | /* This connects the DMA request signal to the ISA bus */ | |
5167 | usc_OutReg(info, PCR, (u16)((usc_InReg(info, PCR) | BIT15) & ~BIT14)); | |
5168 | } | |
5169 | ||
5170 | /* DMA Control Register (DCR) | |
5171 | * | |
5172 | * <15..14> 10 Priority mode = Alternating Tx/Rx | |
5173 | * 01 Rx has priority | |
5174 | * 00 Tx has priority | |
5175 | * | |
5176 | * <13> 1 Enable Priority Preempt per DCR<15..14> | |
5177 | * (WARNING DCR<11..10> must be 00 when this is 1) | |
5178 | * 0 Choose activate channel per DCR<11..10> | |
5179 | * | |
5180 | * <12> 0 Little Endian for Array/List | |
5181 | * <11..10> 00 Both Channels can use each bus grant | |
5182 | * <9..6> 0000 reserved | |
5183 | * <5> 0 7 CLK - Minimum Bus Re-request Interval | |
5184 | * <4> 0 1 = drive D/C and S/D pins | |
5185 | * <3> 1 1 = Add one wait state to all DMA cycles. | |
5186 | * <2> 0 1 = Strobe /UAS on every transfer. | |
5187 | * <1..0> 11 Addr incrementing only affects LS24 bits | |
5188 | * | |
5189 | * 0110 0000 0000 1011 = 0x600b | |
5190 | */ | |
5191 | ||
5192 | if ( info->bus_type == MGSL_BUS_TYPE_PCI ) { | |
5193 | /* PCI adapter does not need DMA wait state */ | |
5194 | usc_OutDmaReg( info, DCR, 0xa00b ); | |
5195 | } | |
5196 | else | |
5197 | usc_OutDmaReg( info, DCR, 0x800b ); | |
5198 | ||
5199 | ||
5200 | /* Receive DMA mode Register (RDMR) | |
5201 | * | |
5202 | * <15..14> 11 DMA mode = Linked List Buffer mode | |
5203 | * <13> 1 RSBinA/L = store Rx status Block in Arrary/List entry | |
5204 | * <12> 1 Clear count of List Entry after fetching | |
5205 | * <11..10> 00 Address mode = Increment | |
5206 | * <9> 1 Terminate Buffer on RxBound | |
5207 | * <8> 0 Bus Width = 16bits | |
5208 | * <7..0> ? status Bits (write as 0s) | |
5209 | * | |
5210 | * 1111 0010 0000 0000 = 0xf200 | |
5211 | */ | |
5212 | ||
5213 | usc_OutDmaReg( info, RDMR, 0xf200 ); | |
5214 | ||
5215 | ||
5216 | /* Transmit DMA mode Register (TDMR) | |
5217 | * | |
5218 | * <15..14> 11 DMA mode = Linked List Buffer mode | |
5219 | * <13> 1 TCBinA/L = fetch Tx Control Block from List entry | |
5220 | * <12> 1 Clear count of List Entry after fetching | |
5221 | * <11..10> 00 Address mode = Increment | |
5222 | * <9> 1 Terminate Buffer on end of frame | |
5223 | * <8> 0 Bus Width = 16bits | |
5224 | * <7..0> ? status Bits (Read Only so write as 0) | |
5225 | * | |
5226 | * 1111 0010 0000 0000 = 0xf200 | |
5227 | */ | |
5228 | ||
5229 | usc_OutDmaReg( info, TDMR, 0xf200 ); | |
5230 | ||
5231 | ||
5232 | /* DMA Interrupt Control Register (DICR) | |
5233 | * | |
5234 | * <15> 1 DMA Interrupt Enable | |
5235 | * <14> 0 1 = Disable IEO from USC | |
5236 | * <13> 0 1 = Don't provide vector during IntAck | |
5237 | * <12> 1 1 = Include status in Vector | |
5238 | * <10..2> 0 reserved, Must be 0s | |
5239 | * <1> 0 1 = Rx DMA Interrupt Enabled | |
5240 | * <0> 0 1 = Tx DMA Interrupt Enabled | |
5241 | * | |
5242 | * 1001 0000 0000 0000 = 0x9000 | |
5243 | */ | |
5244 | ||
5245 | usc_OutDmaReg( info, DICR, 0x9000 ); | |
5246 | ||
5247 | usc_InDmaReg( info, RDMR ); /* clear pending receive DMA IRQ bits */ | |
5248 | usc_InDmaReg( info, TDMR ); /* clear pending transmit DMA IRQ bits */ | |
5249 | usc_OutDmaReg( info, CDIR, 0x0303 ); /* clear IUS and Pending for Tx and Rx */ | |
5250 | ||
5251 | /* Channel Control Register (CCR) | |
5252 | * | |
5253 | * <15..14> 10 Use 32-bit Tx Control Blocks (TCBs) | |
5254 | * <13> 0 Trigger Tx on SW Command Disabled | |
5255 | * <12> 0 Flag Preamble Disabled | |
5256 | * <11..10> 00 Preamble Length | |
5257 | * <9..8> 00 Preamble Pattern | |
5258 | * <7..6> 10 Use 32-bit Rx status Blocks (RSBs) | |
5259 | * <5> 0 Trigger Rx on SW Command Disabled | |
5260 | * <4..0> 0 reserved | |
5261 | * | |
5262 | * 1000 0000 1000 0000 = 0x8080 | |
5263 | */ | |
5264 | ||
5265 | RegValue = 0x8080; | |
5266 | ||
5267 | switch ( info->params.preamble_length ) { | |
5268 | case HDLC_PREAMBLE_LENGTH_16BITS: RegValue |= BIT10; break; | |
5269 | case HDLC_PREAMBLE_LENGTH_32BITS: RegValue |= BIT11; break; | |
5270 | case HDLC_PREAMBLE_LENGTH_64BITS: RegValue |= BIT11 + BIT10; break; | |
5271 | } | |
5272 | ||
5273 | switch ( info->params.preamble ) { | |
5274 | case HDLC_PREAMBLE_PATTERN_FLAGS: RegValue |= BIT8 + BIT12; break; | |
5275 | case HDLC_PREAMBLE_PATTERN_ONES: RegValue |= BIT8; break; | |
5276 | case HDLC_PREAMBLE_PATTERN_10: RegValue |= BIT9; break; | |
5277 | case HDLC_PREAMBLE_PATTERN_01: RegValue |= BIT9 + BIT8; break; | |
5278 | } | |
5279 | ||
5280 | usc_OutReg( info, CCR, RegValue ); | |
5281 | ||
5282 | ||
5283 | /* | |
5284 | * Burst/Dwell Control Register | |
5285 | * | |
5286 | * <15..8> 0x20 Maximum number of transfers per bus grant | |
5287 | * <7..0> 0x00 Maximum number of clock cycles per bus grant | |
5288 | */ | |
5289 | ||
5290 | if ( info->bus_type == MGSL_BUS_TYPE_PCI ) { | |
5291 | /* don't limit bus occupancy on PCI adapter */ | |
5292 | usc_OutDmaReg( info, BDCR, 0x0000 ); | |
5293 | } | |
5294 | else | |
5295 | usc_OutDmaReg( info, BDCR, 0x2000 ); | |
5296 | ||
5297 | usc_stop_transmitter(info); | |
5298 | usc_stop_receiver(info); | |
5299 | ||
5300 | } /* end of usc_set_sdlc_mode() */ | |
5301 | ||
5302 | /* usc_enable_loopback() | |
5303 | * | |
5304 | * Set the 16C32 for internal loopback mode. | |
5305 | * The TxCLK and RxCLK signals are generated from the BRG0 and | |
5306 | * the TxD is looped back to the RxD internally. | |
5307 | * | |
5308 | * Arguments: info pointer to device instance data | |
5309 | * enable 1 = enable loopback, 0 = disable | |
5310 | * Return Value: None | |
5311 | */ | |
5312 | static void usc_enable_loopback(struct mgsl_struct *info, int enable) | |
5313 | { | |
5314 | if (enable) { | |
5315 | /* blank external TXD output */ | |
5316 | usc_OutReg(info,IOCR,usc_InReg(info,IOCR) | (BIT7+BIT6)); | |
5317 | ||
5318 | /* Clock mode Control Register (CMCR) | |
5319 | * | |
5320 | * <15..14> 00 counter 1 Disabled | |
5321 | * <13..12> 00 counter 0 Disabled | |
5322 | * <11..10> 11 BRG1 Input is TxC Pin | |
5323 | * <9..8> 11 BRG0 Input is TxC Pin | |
5324 | * <7..6> 01 DPLL Input is BRG1 Output | |
5325 | * <5..3> 100 TxCLK comes from BRG0 | |
5326 | * <2..0> 100 RxCLK comes from BRG0 | |
5327 | * | |
5328 | * 0000 1111 0110 0100 = 0x0f64 | |
5329 | */ | |
5330 | ||
5331 | usc_OutReg( info, CMCR, 0x0f64 ); | |
5332 | ||
5333 | /* Write 16-bit Time Constant for BRG0 */ | |
5334 | /* use clock speed if available, otherwise use 8 for diagnostics */ | |
5335 | if (info->params.clock_speed) { | |
5336 | if (info->bus_type == MGSL_BUS_TYPE_PCI) | |
5337 | usc_OutReg(info, TC0R, (u16)((11059200/info->params.clock_speed)-1)); | |
5338 | else | |
5339 | usc_OutReg(info, TC0R, (u16)((14745600/info->params.clock_speed)-1)); | |
5340 | } else | |
5341 | usc_OutReg(info, TC0R, (u16)8); | |
5342 | ||
5343 | /* Hardware Configuration Register (HCR) Clear Bit 1, BRG0 | |
5344 | mode = Continuous Set Bit 0 to enable BRG0. */ | |
5345 | usc_OutReg( info, HCR, (u16)((usc_InReg( info, HCR ) & ~BIT1) | BIT0) ); | |
5346 | ||
5347 | /* Input/Output Control Reg, <2..0> = 100, Drive RxC pin with BRG0 */ | |
5348 | usc_OutReg(info, IOCR, (u16)((usc_InReg(info, IOCR) & 0xfff8) | 0x0004)); | |
5349 | ||
5350 | /* set Internal Data loopback mode */ | |
5351 | info->loopback_bits = 0x300; | |
5352 | outw( 0x0300, info->io_base + CCAR ); | |
5353 | } else { | |
5354 | /* enable external TXD output */ | |
5355 | usc_OutReg(info,IOCR,usc_InReg(info,IOCR) & ~(BIT7+BIT6)); | |
5356 | ||
5357 | /* clear Internal Data loopback mode */ | |
5358 | info->loopback_bits = 0; | |
5359 | outw( 0,info->io_base + CCAR ); | |
5360 | } | |
5361 | ||
5362 | } /* end of usc_enable_loopback() */ | |
5363 | ||
5364 | /* usc_enable_aux_clock() | |
5365 | * | |
5366 | * Enabled the AUX clock output at the specified frequency. | |
5367 | * | |
5368 | * Arguments: | |
5369 | * | |
5370 | * info pointer to device extension | |
5371 | * data_rate data rate of clock in bits per second | |
5372 | * A data rate of 0 disables the AUX clock. | |
5373 | * | |
5374 | * Return Value: None | |
5375 | */ | |
5376 | static void usc_enable_aux_clock( struct mgsl_struct *info, u32 data_rate ) | |
5377 | { | |
5378 | u32 XtalSpeed; | |
5379 | u16 Tc; | |
5380 | ||
5381 | if ( data_rate ) { | |
5382 | if ( info->bus_type == MGSL_BUS_TYPE_PCI ) | |
5383 | XtalSpeed = 11059200; | |
5384 | else | |
5385 | XtalSpeed = 14745600; | |
5386 | ||
5387 | ||
5388 | /* Tc = (Xtal/Speed) - 1 */ | |
5389 | /* If twice the remainder of (Xtal/Speed) is greater than Speed */ | |
5390 | /* then rounding up gives a more precise time constant. Instead */ | |
5391 | /* of rounding up and then subtracting 1 we just don't subtract */ | |
5392 | /* the one in this case. */ | |
5393 | ||
5394 | ||
5395 | Tc = (u16)(XtalSpeed/data_rate); | |
5396 | if ( !(((XtalSpeed % data_rate) * 2) / data_rate) ) | |
5397 | Tc--; | |
5398 | ||
5399 | /* Write 16-bit Time Constant for BRG0 */ | |
5400 | usc_OutReg( info, TC0R, Tc ); | |
5401 | ||
5402 | /* | |
5403 | * Hardware Configuration Register (HCR) | |
5404 | * Clear Bit 1, BRG0 mode = Continuous | |
5405 | * Set Bit 0 to enable BRG0. | |
5406 | */ | |
5407 | ||
5408 | usc_OutReg( info, HCR, (u16)((usc_InReg( info, HCR ) & ~BIT1) | BIT0) ); | |
5409 | ||
5410 | /* Input/Output Control Reg, <2..0> = 100, Drive RxC pin with BRG0 */ | |
5411 | usc_OutReg( info, IOCR, (u16)((usc_InReg(info, IOCR) & 0xfff8) | 0x0004) ); | |
5412 | } else { | |
5413 | /* data rate == 0 so turn off BRG0 */ | |
5414 | usc_OutReg( info, HCR, (u16)(usc_InReg( info, HCR ) & ~BIT0) ); | |
5415 | } | |
5416 | ||
5417 | } /* end of usc_enable_aux_clock() */ | |
5418 | ||
5419 | /* | |
5420 | * | |
5421 | * usc_process_rxoverrun_sync() | |
5422 | * | |
5423 | * This function processes a receive overrun by resetting the | |
5424 | * receive DMA buffers and issuing a Purge Rx FIFO command | |
5425 | * to allow the receiver to continue receiving. | |
5426 | * | |
5427 | * Arguments: | |
5428 | * | |
5429 | * info pointer to device extension | |
5430 | * | |
5431 | * Return Value: None | |
5432 | */ | |
5433 | static void usc_process_rxoverrun_sync( struct mgsl_struct *info ) | |
5434 | { | |
5435 | int start_index; | |
5436 | int end_index; | |
5437 | int frame_start_index; | |
5438 | int start_of_frame_found = FALSE; | |
5439 | int end_of_frame_found = FALSE; | |
5440 | int reprogram_dma = FALSE; | |
5441 | ||
5442 | DMABUFFERENTRY *buffer_list = info->rx_buffer_list; | |
5443 | u32 phys_addr; | |
5444 | ||
5445 | usc_DmaCmd( info, DmaCmd_PauseRxChannel ); | |
5446 | usc_RCmd( info, RCmd_EnterHuntmode ); | |
5447 | usc_RTCmd( info, RTCmd_PurgeRxFifo ); | |
5448 | ||
5449 | /* CurrentRxBuffer points to the 1st buffer of the next */ | |
5450 | /* possibly available receive frame. */ | |
5451 | ||
5452 | frame_start_index = start_index = end_index = info->current_rx_buffer; | |
5453 | ||
5454 | /* Search for an unfinished string of buffers. This means */ | |
5455 | /* that a receive frame started (at least one buffer with */ | |
5456 | /* count set to zero) but there is no terminiting buffer */ | |
5457 | /* (status set to non-zero). */ | |
5458 | ||
5459 | while( !buffer_list[end_index].count ) | |
5460 | { | |
5461 | /* Count field has been reset to zero by 16C32. */ | |
5462 | /* This buffer is currently in use. */ | |
5463 | ||
5464 | if ( !start_of_frame_found ) | |
5465 | { | |
5466 | start_of_frame_found = TRUE; | |
5467 | frame_start_index = end_index; | |
5468 | end_of_frame_found = FALSE; | |
5469 | } | |
5470 | ||
5471 | if ( buffer_list[end_index].status ) | |
5472 | { | |
5473 | /* Status field has been set by 16C32. */ | |
5474 | /* This is the last buffer of a received frame. */ | |
5475 | ||
5476 | /* We want to leave the buffers for this frame intact. */ | |
5477 | /* Move on to next possible frame. */ | |
5478 | ||
5479 | start_of_frame_found = FALSE; | |
5480 | end_of_frame_found = TRUE; | |
5481 | } | |
5482 | ||
5483 | /* advance to next buffer entry in linked list */ | |
5484 | end_index++; | |
5485 | if ( end_index == info->rx_buffer_count ) | |
5486 | end_index = 0; | |
5487 | ||
5488 | if ( start_index == end_index ) | |
5489 | { | |
5490 | /* The entire list has been searched with all Counts == 0 and */ | |
5491 | /* all Status == 0. The receive buffers are */ | |
5492 | /* completely screwed, reset all receive buffers! */ | |
5493 | mgsl_reset_rx_dma_buffers( info ); | |
5494 | frame_start_index = 0; | |
5495 | start_of_frame_found = FALSE; | |
5496 | reprogram_dma = TRUE; | |
5497 | break; | |
5498 | } | |
5499 | } | |
5500 | ||
5501 | if ( start_of_frame_found && !end_of_frame_found ) | |
5502 | { | |
5503 | /* There is an unfinished string of receive DMA buffers */ | |
5504 | /* as a result of the receiver overrun. */ | |
5505 | ||
5506 | /* Reset the buffers for the unfinished frame */ | |
5507 | /* and reprogram the receive DMA controller to start */ | |
5508 | /* at the 1st buffer of unfinished frame. */ | |
5509 | ||
5510 | start_index = frame_start_index; | |
5511 | ||
5512 | do | |
5513 | { | |
5514 | *((unsigned long *)&(info->rx_buffer_list[start_index++].count)) = DMABUFFERSIZE; | |
5515 | ||
5516 | /* Adjust index for wrap around. */ | |
5517 | if ( start_index == info->rx_buffer_count ) | |
5518 | start_index = 0; | |
5519 | ||
5520 | } while( start_index != end_index ); | |
5521 | ||
5522 | reprogram_dma = TRUE; | |
5523 | } | |
5524 | ||
5525 | if ( reprogram_dma ) | |
5526 | { | |
5527 | usc_UnlatchRxstatusBits(info,RXSTATUS_ALL); | |
5528 | usc_ClearIrqPendingBits(info, RECEIVE_DATA|RECEIVE_STATUS); | |
5529 | usc_UnlatchRxstatusBits(info, RECEIVE_DATA|RECEIVE_STATUS); | |
5530 | ||
5531 | usc_EnableReceiver(info,DISABLE_UNCONDITIONAL); | |
5532 | ||
5533 | /* This empties the receive FIFO and loads the RCC with RCLR */ | |
5534 | usc_OutReg( info, CCSR, (u16)(usc_InReg(info,CCSR) | BIT13) ); | |
5535 | ||
5536 | /* program 16C32 with physical address of 1st DMA buffer entry */ | |
5537 | phys_addr = info->rx_buffer_list[frame_start_index].phys_entry; | |
5538 | usc_OutDmaReg( info, NRARL, (u16)phys_addr ); | |
5539 | usc_OutDmaReg( info, NRARU, (u16)(phys_addr >> 16) ); | |
5540 | ||
5541 | usc_UnlatchRxstatusBits( info, RXSTATUS_ALL ); | |
5542 | usc_ClearIrqPendingBits( info, RECEIVE_DATA + RECEIVE_STATUS ); | |
5543 | usc_EnableInterrupts( info, RECEIVE_STATUS ); | |
5544 | ||
5545 | /* 1. Arm End of Buffer (EOB) Receive DMA Interrupt (BIT2 of RDIAR) */ | |
5546 | /* 2. Enable Receive DMA Interrupts (BIT1 of DICR) */ | |
5547 | ||
5548 | usc_OutDmaReg( info, RDIAR, BIT3 + BIT2 ); | |
5549 | usc_OutDmaReg( info, DICR, (u16)(usc_InDmaReg(info,DICR) | BIT1) ); | |
5550 | usc_DmaCmd( info, DmaCmd_InitRxChannel ); | |
5551 | if ( info->params.flags & HDLC_FLAG_AUTO_DCD ) | |
5552 | usc_EnableReceiver(info,ENABLE_AUTO_DCD); | |
5553 | else | |
5554 | usc_EnableReceiver(info,ENABLE_UNCONDITIONAL); | |
5555 | } | |
5556 | else | |
5557 | { | |
5558 | /* This empties the receive FIFO and loads the RCC with RCLR */ | |
5559 | usc_OutReg( info, CCSR, (u16)(usc_InReg(info,CCSR) | BIT13) ); | |
5560 | usc_RTCmd( info, RTCmd_PurgeRxFifo ); | |
5561 | } | |
5562 | ||
5563 | } /* end of usc_process_rxoverrun_sync() */ | |
5564 | ||
5565 | /* usc_stop_receiver() | |
5566 | * | |
5567 | * Disable USC receiver | |
5568 | * | |
5569 | * Arguments: info pointer to device instance data | |
5570 | * Return Value: None | |
5571 | */ | |
5572 | static void usc_stop_receiver( struct mgsl_struct *info ) | |
5573 | { | |
5574 | if (debug_level >= DEBUG_LEVEL_ISR) | |
5575 | printk("%s(%d):usc_stop_receiver(%s)\n", | |
5576 | __FILE__,__LINE__, info->device_name ); | |
5577 | ||
5578 | /* Disable receive DMA channel. */ | |
5579 | /* This also disables receive DMA channel interrupts */ | |
5580 | usc_DmaCmd( info, DmaCmd_ResetRxChannel ); | |
5581 | ||
5582 | usc_UnlatchRxstatusBits( info, RXSTATUS_ALL ); | |
5583 | usc_ClearIrqPendingBits( info, RECEIVE_DATA + RECEIVE_STATUS ); | |
5584 | usc_DisableInterrupts( info, RECEIVE_DATA + RECEIVE_STATUS ); | |
5585 | ||
5586 | usc_EnableReceiver(info,DISABLE_UNCONDITIONAL); | |
5587 | ||
5588 | /* This empties the receive FIFO and loads the RCC with RCLR */ | |
5589 | usc_OutReg( info, CCSR, (u16)(usc_InReg(info,CCSR) | BIT13) ); | |
5590 | usc_RTCmd( info, RTCmd_PurgeRxFifo ); | |
5591 | ||
5592 | info->rx_enabled = 0; | |
5593 | info->rx_overflow = 0; | |
5594 | info->rx_rcc_underrun = 0; | |
5595 | ||
5596 | } /* end of stop_receiver() */ | |
5597 | ||
5598 | /* usc_start_receiver() | |
5599 | * | |
5600 | * Enable the USC receiver | |
5601 | * | |
5602 | * Arguments: info pointer to device instance data | |
5603 | * Return Value: None | |
5604 | */ | |
5605 | static void usc_start_receiver( struct mgsl_struct *info ) | |
5606 | { | |
5607 | u32 phys_addr; | |
5608 | ||
5609 | if (debug_level >= DEBUG_LEVEL_ISR) | |
5610 | printk("%s(%d):usc_start_receiver(%s)\n", | |
5611 | __FILE__,__LINE__, info->device_name ); | |
5612 | ||
5613 | mgsl_reset_rx_dma_buffers( info ); | |
5614 | usc_stop_receiver( info ); | |
5615 | ||
5616 | usc_OutReg( info, CCSR, (u16)(usc_InReg(info,CCSR) | BIT13) ); | |
5617 | usc_RTCmd( info, RTCmd_PurgeRxFifo ); | |
5618 | ||
5619 | if ( info->params.mode == MGSL_MODE_HDLC || | |
5620 | info->params.mode == MGSL_MODE_RAW ) { | |
5621 | /* DMA mode Transfers */ | |
5622 | /* Program the DMA controller. */ | |
5623 | /* Enable the DMA controller end of buffer interrupt. */ | |
5624 | ||
5625 | /* program 16C32 with physical address of 1st DMA buffer entry */ | |
5626 | phys_addr = info->rx_buffer_list[0].phys_entry; | |
5627 | usc_OutDmaReg( info, NRARL, (u16)phys_addr ); | |
5628 | usc_OutDmaReg( info, NRARU, (u16)(phys_addr >> 16) ); | |
5629 | ||
5630 | usc_UnlatchRxstatusBits( info, RXSTATUS_ALL ); | |
5631 | usc_ClearIrqPendingBits( info, RECEIVE_DATA + RECEIVE_STATUS ); | |
5632 | usc_EnableInterrupts( info, RECEIVE_STATUS ); | |
5633 | ||
5634 | /* 1. Arm End of Buffer (EOB) Receive DMA Interrupt (BIT2 of RDIAR) */ | |
5635 | /* 2. Enable Receive DMA Interrupts (BIT1 of DICR) */ | |
5636 | ||
5637 | usc_OutDmaReg( info, RDIAR, BIT3 + BIT2 ); | |
5638 | usc_OutDmaReg( info, DICR, (u16)(usc_InDmaReg(info,DICR) | BIT1) ); | |
5639 | usc_DmaCmd( info, DmaCmd_InitRxChannel ); | |
5640 | if ( info->params.flags & HDLC_FLAG_AUTO_DCD ) | |
5641 | usc_EnableReceiver(info,ENABLE_AUTO_DCD); | |
5642 | else | |
5643 | usc_EnableReceiver(info,ENABLE_UNCONDITIONAL); | |
5644 | } else { | |
5645 | usc_UnlatchRxstatusBits(info, RXSTATUS_ALL); | |
5646 | usc_ClearIrqPendingBits(info, RECEIVE_DATA + RECEIVE_STATUS); | |
5647 | usc_EnableInterrupts(info, RECEIVE_DATA); | |
5648 | ||
5649 | usc_RTCmd( info, RTCmd_PurgeRxFifo ); | |
5650 | usc_RCmd( info, RCmd_EnterHuntmode ); | |
5651 | ||
5652 | usc_EnableReceiver(info,ENABLE_UNCONDITIONAL); | |
5653 | } | |
5654 | ||
5655 | usc_OutReg( info, CCSR, 0x1020 ); | |
5656 | ||
5657 | info->rx_enabled = 1; | |
5658 | ||
5659 | } /* end of usc_start_receiver() */ | |
5660 | ||
5661 | /* usc_start_transmitter() | |
5662 | * | |
5663 | * Enable the USC transmitter and send a transmit frame if | |
5664 | * one is loaded in the DMA buffers. | |
5665 | * | |
5666 | * Arguments: info pointer to device instance data | |
5667 | * Return Value: None | |
5668 | */ | |
5669 | static void usc_start_transmitter( struct mgsl_struct *info ) | |
5670 | { | |
5671 | u32 phys_addr; | |
5672 | unsigned int FrameSize; | |
5673 | ||
5674 | if (debug_level >= DEBUG_LEVEL_ISR) | |
5675 | printk("%s(%d):usc_start_transmitter(%s)\n", | |
5676 | __FILE__,__LINE__, info->device_name ); | |
5677 | ||
5678 | if ( info->xmit_cnt ) { | |
5679 | ||
5680 | /* If auto RTS enabled and RTS is inactive, then assert */ | |
5681 | /* RTS and set a flag indicating that the driver should */ | |
5682 | /* negate RTS when the transmission completes. */ | |
5683 | ||
5684 | info->drop_rts_on_tx_done = 0; | |
5685 | ||
5686 | if ( info->params.flags & HDLC_FLAG_AUTO_RTS ) { | |
5687 | usc_get_serial_signals( info ); | |
5688 | if ( !(info->serial_signals & SerialSignal_RTS) ) { | |
5689 | info->serial_signals |= SerialSignal_RTS; | |
5690 | usc_set_serial_signals( info ); | |
5691 | info->drop_rts_on_tx_done = 1; | |
5692 | } | |
5693 | } | |
5694 | ||
5695 | ||
5696 | if ( info->params.mode == MGSL_MODE_ASYNC ) { | |
5697 | if ( !info->tx_active ) { | |
5698 | usc_UnlatchTxstatusBits(info, TXSTATUS_ALL); | |
5699 | usc_ClearIrqPendingBits(info, TRANSMIT_STATUS + TRANSMIT_DATA); | |
5700 | usc_EnableInterrupts(info, TRANSMIT_DATA); | |
5701 | usc_load_txfifo(info); | |
5702 | } | |
5703 | } else { | |
5704 | /* Disable transmit DMA controller while programming. */ | |
5705 | usc_DmaCmd( info, DmaCmd_ResetTxChannel ); | |
5706 | ||
5707 | /* Transmit DMA buffer is loaded, so program USC */ | |
5708 | /* to send the frame contained in the buffers. */ | |
5709 | ||
5710 | FrameSize = info->tx_buffer_list[info->start_tx_dma_buffer].rcc; | |
5711 | ||
5712 | /* if operating in Raw sync mode, reset the rcc component | |
5713 | * of the tx dma buffer entry, otherwise, the serial controller | |
5714 | * will send a closing sync char after this count. | |
5715 | */ | |
5716 | if ( info->params.mode == MGSL_MODE_RAW ) | |
5717 | info->tx_buffer_list[info->start_tx_dma_buffer].rcc = 0; | |
5718 | ||
5719 | /* Program the Transmit Character Length Register (TCLR) */ | |
5720 | /* and clear FIFO (TCC is loaded with TCLR on FIFO clear) */ | |
5721 | usc_OutReg( info, TCLR, (u16)FrameSize ); | |
5722 | ||
5723 | usc_RTCmd( info, RTCmd_PurgeTxFifo ); | |
5724 | ||
5725 | /* Program the address of the 1st DMA Buffer Entry in linked list */ | |
5726 | phys_addr = info->tx_buffer_list[info->start_tx_dma_buffer].phys_entry; | |
5727 | usc_OutDmaReg( info, NTARL, (u16)phys_addr ); | |
5728 | usc_OutDmaReg( info, NTARU, (u16)(phys_addr >> 16) ); | |
5729 | ||
5730 | usc_UnlatchTxstatusBits( info, TXSTATUS_ALL ); | |
5731 | usc_ClearIrqPendingBits( info, TRANSMIT_STATUS ); | |
5732 | usc_EnableInterrupts( info, TRANSMIT_STATUS ); | |
5733 | ||
5734 | if ( info->params.mode == MGSL_MODE_RAW && | |
5735 | info->num_tx_dma_buffers > 1 ) { | |
5736 | /* When running external sync mode, attempt to 'stream' transmit */ | |
5737 | /* by filling tx dma buffers as they become available. To do this */ | |
5738 | /* we need to enable Tx DMA EOB Status interrupts : */ | |
5739 | /* */ | |
5740 | /* 1. Arm End of Buffer (EOB) Transmit DMA Interrupt (BIT2 of TDIAR) */ | |
5741 | /* 2. Enable Transmit DMA Interrupts (BIT0 of DICR) */ | |
5742 | ||
5743 | usc_OutDmaReg( info, TDIAR, BIT2|BIT3 ); | |
5744 | usc_OutDmaReg( info, DICR, (u16)(usc_InDmaReg(info,DICR) | BIT0) ); | |
5745 | } | |
5746 | ||
5747 | /* Initialize Transmit DMA Channel */ | |
5748 | usc_DmaCmd( info, DmaCmd_InitTxChannel ); | |
5749 | ||
5750 | usc_TCmd( info, TCmd_SendFrame ); | |
5751 | ||
5752 | info->tx_timer.expires = jiffies + msecs_to_jiffies(5000); | |
5753 | add_timer(&info->tx_timer); | |
5754 | } | |
5755 | info->tx_active = 1; | |
5756 | } | |
5757 | ||
5758 | if ( !info->tx_enabled ) { | |
5759 | info->tx_enabled = 1; | |
5760 | if ( info->params.flags & HDLC_FLAG_AUTO_CTS ) | |
5761 | usc_EnableTransmitter(info,ENABLE_AUTO_CTS); | |
5762 | else | |
5763 | usc_EnableTransmitter(info,ENABLE_UNCONDITIONAL); | |
5764 | } | |
5765 | ||
5766 | } /* end of usc_start_transmitter() */ | |
5767 | ||
5768 | /* usc_stop_transmitter() | |
5769 | * | |
5770 | * Stops the transmitter and DMA | |
5771 | * | |
5772 | * Arguments: info pointer to device isntance data | |
5773 | * Return Value: None | |
5774 | */ | |
5775 | static void usc_stop_transmitter( struct mgsl_struct *info ) | |
5776 | { | |
5777 | if (debug_level >= DEBUG_LEVEL_ISR) | |
5778 | printk("%s(%d):usc_stop_transmitter(%s)\n", | |
5779 | __FILE__,__LINE__, info->device_name ); | |
5780 | ||
5781 | del_timer(&info->tx_timer); | |
5782 | ||
5783 | usc_UnlatchTxstatusBits( info, TXSTATUS_ALL ); | |
5784 | usc_ClearIrqPendingBits( info, TRANSMIT_STATUS + TRANSMIT_DATA ); | |
5785 | usc_DisableInterrupts( info, TRANSMIT_STATUS + TRANSMIT_DATA ); | |
5786 | ||
5787 | usc_EnableTransmitter(info,DISABLE_UNCONDITIONAL); | |
5788 | usc_DmaCmd( info, DmaCmd_ResetTxChannel ); | |
5789 | usc_RTCmd( info, RTCmd_PurgeTxFifo ); | |
5790 | ||
5791 | info->tx_enabled = 0; | |
5792 | info->tx_active = 0; | |
5793 | ||
5794 | } /* end of usc_stop_transmitter() */ | |
5795 | ||
5796 | /* usc_load_txfifo() | |
5797 | * | |
5798 | * Fill the transmit FIFO until the FIFO is full or | |
5799 | * there is no more data to load. | |
5800 | * | |
5801 | * Arguments: info pointer to device extension (instance data) | |
5802 | * Return Value: None | |
5803 | */ | |
5804 | static void usc_load_txfifo( struct mgsl_struct *info ) | |
5805 | { | |
5806 | int Fifocount; | |
5807 | u8 TwoBytes[2]; | |
5808 | ||
5809 | if ( !info->xmit_cnt && !info->x_char ) | |
5810 | return; | |
5811 | ||
5812 | /* Select transmit FIFO status readback in TICR */ | |
5813 | usc_TCmd( info, TCmd_SelectTicrTxFifostatus ); | |
5814 | ||
5815 | /* load the Transmit FIFO until FIFOs full or all data sent */ | |
5816 | ||
5817 | while( (Fifocount = usc_InReg(info, TICR) >> 8) && info->xmit_cnt ) { | |
5818 | /* there is more space in the transmit FIFO and */ | |
5819 | /* there is more data in transmit buffer */ | |
5820 | ||
5821 | if ( (info->xmit_cnt > 1) && (Fifocount > 1) && !info->x_char ) { | |
5822 | /* write a 16-bit word from transmit buffer to 16C32 */ | |
5823 | ||
5824 | TwoBytes[0] = info->xmit_buf[info->xmit_tail++]; | |
5825 | info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1); | |
5826 | TwoBytes[1] = info->xmit_buf[info->xmit_tail++]; | |
5827 | info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1); | |
5828 | ||
5829 | outw( *((u16 *)TwoBytes), info->io_base + DATAREG); | |
5830 | ||
5831 | info->xmit_cnt -= 2; | |
5832 | info->icount.tx += 2; | |
5833 | } else { | |
5834 | /* only 1 byte left to transmit or 1 FIFO slot left */ | |
5835 | ||
5836 | outw( (inw( info->io_base + CCAR) & 0x0780) | (TDR+LSBONLY), | |
5837 | info->io_base + CCAR ); | |
5838 | ||
5839 | if (info->x_char) { | |
5840 | /* transmit pending high priority char */ | |
5841 | outw( info->x_char,info->io_base + CCAR ); | |
5842 | info->x_char = 0; | |
5843 | } else { | |
5844 | outw( info->xmit_buf[info->xmit_tail++],info->io_base + CCAR ); | |
5845 | info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1); | |
5846 | info->xmit_cnt--; | |
5847 | } | |
5848 | info->icount.tx++; | |
5849 | } | |
5850 | } | |
5851 | ||
5852 | } /* end of usc_load_txfifo() */ | |
5853 | ||
5854 | /* usc_reset() | |
5855 | * | |
5856 | * Reset the adapter to a known state and prepare it for further use. | |
5857 | * | |
5858 | * Arguments: info pointer to device instance data | |
5859 | * Return Value: None | |
5860 | */ | |
5861 | static void usc_reset( struct mgsl_struct *info ) | |
5862 | { | |
5863 | if ( info->bus_type == MGSL_BUS_TYPE_PCI ) { | |
5864 | int i; | |
5865 | u32 readval; | |
5866 | ||
5867 | /* Set BIT30 of Misc Control Register */ | |
5868 | /* (Local Control Register 0x50) to force reset of USC. */ | |
5869 | ||
5870 | volatile u32 *MiscCtrl = (u32 *)(info->lcr_base + 0x50); | |
5871 | u32 *LCR0BRDR = (u32 *)(info->lcr_base + 0x28); | |
5872 | ||
5873 | info->misc_ctrl_value |= BIT30; | |
5874 | *MiscCtrl = info->misc_ctrl_value; | |
5875 | ||
5876 | /* | |
5877 | * Force at least 170ns delay before clearing | |
5878 | * reset bit. Each read from LCR takes at least | |
5879 | * 30ns so 10 times for 300ns to be safe. | |
5880 | */ | |
5881 | for(i=0;i<10;i++) | |
5882 | readval = *MiscCtrl; | |
5883 | ||
5884 | info->misc_ctrl_value &= ~BIT30; | |
5885 | *MiscCtrl = info->misc_ctrl_value; | |
5886 | ||
5887 | *LCR0BRDR = BUS_DESCRIPTOR( | |
5888 | 1, // Write Strobe Hold (0-3) | |
5889 | 2, // Write Strobe Delay (0-3) | |
5890 | 2, // Read Strobe Delay (0-3) | |
5891 | 0, // NWDD (Write data-data) (0-3) | |
5892 | 4, // NWAD (Write Addr-data) (0-31) | |
5893 | 0, // NXDA (Read/Write Data-Addr) (0-3) | |
5894 | 0, // NRDD (Read Data-Data) (0-3) | |
5895 | 5 // NRAD (Read Addr-Data) (0-31) | |
5896 | ); | |
5897 | } else { | |
5898 | /* do HW reset */ | |
5899 | outb( 0,info->io_base + 8 ); | |
5900 | } | |
5901 | ||
5902 | info->mbre_bit = 0; | |
5903 | info->loopback_bits = 0; | |
5904 | info->usc_idle_mode = 0; | |
5905 | ||
5906 | /* | |
5907 | * Program the Bus Configuration Register (BCR) | |
5908 | * | |
5909 | * <15> 0 Don't use separate address | |
5910 | * <14..6> 0 reserved | |
5911 | * <5..4> 00 IAckmode = Default, don't care | |
5912 | * <3> 1 Bus Request Totem Pole output | |
5913 | * <2> 1 Use 16 Bit data bus | |
5914 | * <1> 0 IRQ Totem Pole output | |
5915 | * <0> 0 Don't Shift Right Addr | |
5916 | * | |
5917 | * 0000 0000 0000 1100 = 0x000c | |
5918 | * | |
5919 | * By writing to io_base + SDPIN the Wait/Ack pin is | |
5920 | * programmed to work as a Wait pin. | |
5921 | */ | |
5922 | ||
5923 | outw( 0x000c,info->io_base + SDPIN ); | |
5924 | ||
5925 | ||
5926 | outw( 0,info->io_base ); | |
5927 | outw( 0,info->io_base + CCAR ); | |
5928 | ||
5929 | /* select little endian byte ordering */ | |
5930 | usc_RTCmd( info, RTCmd_SelectLittleEndian ); | |
5931 | ||
5932 | ||
5933 | /* Port Control Register (PCR) | |
5934 | * | |
5935 | * <15..14> 11 Port 7 is Output (~DMAEN, Bit 14 : 0 = Enabled) | |
5936 | * <13..12> 11 Port 6 is Output (~INTEN, Bit 12 : 0 = Enabled) | |
5937 | * <11..10> 00 Port 5 is Input (No Connect, Don't Care) | |
5938 | * <9..8> 00 Port 4 is Input (No Connect, Don't Care) | |
5939 | * <7..6> 11 Port 3 is Output (~RTS, Bit 6 : 0 = Enabled ) | |
5940 | * <5..4> 11 Port 2 is Output (~DTR, Bit 4 : 0 = Enabled ) | |
5941 | * <3..2> 01 Port 1 is Input (Dedicated RxC) | |
5942 | * <1..0> 01 Port 0 is Input (Dedicated TxC) | |
5943 | * | |
5944 | * 1111 0000 1111 0101 = 0xf0f5 | |
5945 | */ | |
5946 | ||
5947 | usc_OutReg( info, PCR, 0xf0f5 ); | |
5948 | ||
5949 | ||
5950 | /* | |
5951 | * Input/Output Control Register | |
5952 | * | |
5953 | * <15..14> 00 CTS is active low input | |
5954 | * <13..12> 00 DCD is active low input | |
5955 | * <11..10> 00 TxREQ pin is input (DSR) | |
5956 | * <9..8> 00 RxREQ pin is input (RI) | |
5957 | * <7..6> 00 TxD is output (Transmit Data) | |
5958 | * <5..3> 000 TxC Pin in Input (14.7456MHz Clock) | |
5959 | * <2..0> 100 RxC is Output (drive with BRG0) | |
5960 | * | |
5961 | * 0000 0000 0000 0100 = 0x0004 | |
5962 | */ | |
5963 | ||
5964 | usc_OutReg( info, IOCR, 0x0004 ); | |
5965 | ||
5966 | } /* end of usc_reset() */ | |
5967 | ||
5968 | /* usc_set_async_mode() | |
5969 | * | |
5970 | * Program adapter for asynchronous communications. | |
5971 | * | |
5972 | * Arguments: info pointer to device instance data | |
5973 | * Return Value: None | |
5974 | */ | |
5975 | static void usc_set_async_mode( struct mgsl_struct *info ) | |
5976 | { | |
5977 | u16 RegValue; | |
5978 | ||
5979 | /* disable interrupts while programming USC */ | |
5980 | usc_DisableMasterIrqBit( info ); | |
5981 | ||
5982 | outw( 0, info->io_base ); /* clear Master Bus Enable (DCAR) */ | |
5983 | usc_DmaCmd( info, DmaCmd_ResetAllChannels ); /* disable both DMA channels */ | |
5984 | ||
5985 | usc_loopback_frame( info ); | |
5986 | ||
5987 | /* Channel mode Register (CMR) | |
5988 | * | |
5989 | * <15..14> 00 Tx Sub modes, 00 = 1 Stop Bit | |
5990 | * <13..12> 00 00 = 16X Clock | |
5991 | * <11..8> 0000 Transmitter mode = Asynchronous | |
5992 | * <7..6> 00 reserved? | |
5993 | * <5..4> 00 Rx Sub modes, 00 = 16X Clock | |
5994 | * <3..0> 0000 Receiver mode = Asynchronous | |
5995 | * | |
5996 | * 0000 0000 0000 0000 = 0x0 | |
5997 | */ | |
5998 | ||
5999 | RegValue = 0; | |
6000 | if ( info->params.stop_bits != 1 ) | |
6001 | RegValue |= BIT14; | |
6002 | usc_OutReg( info, CMR, RegValue ); | |
6003 | ||
6004 | ||
6005 | /* Receiver mode Register (RMR) | |
6006 | * | |
6007 | * <15..13> 000 encoding = None | |
6008 | * <12..08> 00000 reserved (Sync Only) | |
6009 | * <7..6> 00 Even parity | |
6010 | * <5> 0 parity disabled | |
6011 | * <4..2> 000 Receive Char Length = 8 bits | |
6012 | * <1..0> 00 Disable Receiver | |
6013 | * | |
6014 | * 0000 0000 0000 0000 = 0x0 | |
6015 | */ | |
6016 | ||
6017 | RegValue = 0; | |
6018 | ||
6019 | if ( info->params.data_bits != 8 ) | |
6020 | RegValue |= BIT4+BIT3+BIT2; | |
6021 | ||
6022 | if ( info->params.parity != ASYNC_PARITY_NONE ) { | |
6023 | RegValue |= BIT5; | |
6024 | if ( info->params.parity != ASYNC_PARITY_ODD ) | |
6025 | RegValue |= BIT6; | |
6026 | } | |
6027 | ||
6028 | usc_OutReg( info, RMR, RegValue ); | |
6029 | ||
6030 | ||
6031 | /* Set IRQ trigger level */ | |
6032 | ||
6033 | usc_RCmd( info, RCmd_SelectRicrIntLevel ); | |
6034 | ||
6035 | ||
6036 | /* Receive Interrupt Control Register (RICR) | |
6037 | * | |
6038 | * <15..8> ? RxFIFO IRQ Request Level | |
6039 | * | |
6040 | * Note: For async mode the receive FIFO level must be set | |
6041 | * to 0 to aviod the situation where the FIFO contains fewer bytes | |
6042 | * than the trigger level and no more data is expected. | |
6043 | * | |
6044 | * <7> 0 Exited Hunt IA (Interrupt Arm) | |
6045 | * <6> 0 Idle Received IA | |
6046 | * <5> 0 Break/Abort IA | |
6047 | * <4> 0 Rx Bound IA | |
6048 | * <3> 0 Queued status reflects oldest byte in FIFO | |
6049 | * <2> 0 Abort/PE IA | |
6050 | * <1> 0 Rx Overrun IA | |
6051 | * <0> 0 Select TC0 value for readback | |
6052 | * | |
6053 | * 0000 0000 0100 0000 = 0x0000 + (FIFOLEVEL in MSB) | |
6054 | */ | |
6055 | ||
6056 | usc_OutReg( info, RICR, 0x0000 ); | |
6057 | ||
6058 | usc_UnlatchRxstatusBits( info, RXSTATUS_ALL ); | |
6059 | usc_ClearIrqPendingBits( info, RECEIVE_STATUS ); | |
6060 | ||
6061 | ||
6062 | /* Transmit mode Register (TMR) | |
6063 | * | |
6064 | * <15..13> 000 encoding = None | |
6065 | * <12..08> 00000 reserved (Sync Only) | |
6066 | * <7..6> 00 Transmit parity Even | |
6067 | * <5> 0 Transmit parity Disabled | |
6068 | * <4..2> 000 Tx Char Length = 8 bits | |
6069 | * <1..0> 00 Disable Transmitter | |
6070 | * | |
6071 | * 0000 0000 0000 0000 = 0x0 | |
6072 | */ | |
6073 | ||
6074 | RegValue = 0; | |
6075 | ||
6076 | if ( info->params.data_bits != 8 ) | |
6077 | RegValue |= BIT4+BIT3+BIT2; | |
6078 | ||
6079 | if ( info->params.parity != ASYNC_PARITY_NONE ) { | |
6080 | RegValue |= BIT5; | |
6081 | if ( info->params.parity != ASYNC_PARITY_ODD ) | |
6082 | RegValue |= BIT6; | |
6083 | } | |
6084 | ||
6085 | usc_OutReg( info, TMR, RegValue ); | |
6086 | ||
6087 | usc_set_txidle( info ); | |
6088 | ||
6089 | ||
6090 | /* Set IRQ trigger level */ | |
6091 | ||
6092 | usc_TCmd( info, TCmd_SelectTicrIntLevel ); | |
6093 | ||
6094 | ||
6095 | /* Transmit Interrupt Control Register (TICR) | |
6096 | * | |
6097 | * <15..8> ? Transmit FIFO IRQ Level | |
6098 | * <7> 0 Present IA (Interrupt Arm) | |
6099 | * <6> 1 Idle Sent IA | |
6100 | * <5> 0 Abort Sent IA | |
6101 | * <4> 0 EOF/EOM Sent IA | |
6102 | * <3> 0 CRC Sent IA | |
6103 | * <2> 0 1 = Wait for SW Trigger to Start Frame | |
6104 | * <1> 0 Tx Underrun IA | |
6105 | * <0> 0 TC0 constant on read back | |
6106 | * | |
6107 | * 0000 0000 0100 0000 = 0x0040 | |
6108 | */ | |
6109 | ||
6110 | usc_OutReg( info, TICR, 0x1f40 ); | |
6111 | ||
6112 | usc_UnlatchTxstatusBits( info, TXSTATUS_ALL ); | |
6113 | usc_ClearIrqPendingBits( info, TRANSMIT_STATUS ); | |
6114 | ||
6115 | usc_enable_async_clock( info, info->params.data_rate ); | |
6116 | ||
6117 | ||
6118 | /* Channel Control/status Register (CCSR) | |
6119 | * | |
6120 | * <15> X RCC FIFO Overflow status (RO) | |
6121 | * <14> X RCC FIFO Not Empty status (RO) | |
6122 | * <13> 0 1 = Clear RCC FIFO (WO) | |
6123 | * <12> X DPLL in Sync status (RO) | |
6124 | * <11> X DPLL 2 Missed Clocks status (RO) | |
6125 | * <10> X DPLL 1 Missed Clock status (RO) | |
6126 | * <9..8> 00 DPLL Resync on rising and falling edges (RW) | |
6127 | * <7> X SDLC Loop On status (RO) | |
6128 | * <6> X SDLC Loop Send status (RO) | |
6129 | * <5> 1 Bypass counters for TxClk and RxClk (RW) | |
6130 | * <4..2> 000 Last Char of SDLC frame has 8 bits (RW) | |
6131 | * <1..0> 00 reserved | |
6132 | * | |
6133 | * 0000 0000 0010 0000 = 0x0020 | |
6134 | */ | |
6135 | ||
6136 | usc_OutReg( info, CCSR, 0x0020 ); | |
6137 | ||
6138 | usc_DisableInterrupts( info, TRANSMIT_STATUS + TRANSMIT_DATA + | |
6139 | RECEIVE_DATA + RECEIVE_STATUS ); | |
6140 | ||
6141 | usc_ClearIrqPendingBits( info, TRANSMIT_STATUS + TRANSMIT_DATA + | |
6142 | RECEIVE_DATA + RECEIVE_STATUS ); | |
6143 | ||
6144 | usc_EnableMasterIrqBit( info ); | |
6145 | ||
6146 | if (info->bus_type == MGSL_BUS_TYPE_ISA) { | |
6147 | /* Enable INTEN (Port 6, Bit12) */ | |
6148 | /* This connects the IRQ request signal to the ISA bus */ | |
6149 | usc_OutReg(info, PCR, (u16)((usc_InReg(info, PCR) | BIT13) & ~BIT12)); | |
6150 | } | |
6151 | ||
6152 | } /* end of usc_set_async_mode() */ | |
6153 | ||
6154 | /* usc_loopback_frame() | |
6155 | * | |
6156 | * Loop back a small (2 byte) dummy SDLC frame. | |
6157 | * Interrupts and DMA are NOT used. The purpose of this is to | |
6158 | * clear any 'stale' status info left over from running in async mode. | |
6159 | * | |
6160 | * The 16C32 shows the strange behaviour of marking the 1st | |
6161 | * received SDLC frame with a CRC error even when there is no | |
6162 | * CRC error. To get around this a small dummy from of 2 bytes | |
6163 | * is looped back when switching from async to sync mode. | |
6164 | * | |
6165 | * Arguments: info pointer to device instance data | |
6166 | * Return Value: None | |
6167 | */ | |
6168 | static void usc_loopback_frame( struct mgsl_struct *info ) | |
6169 | { | |
6170 | int i; | |
6171 | unsigned long oldmode = info->params.mode; | |
6172 | ||
6173 | info->params.mode = MGSL_MODE_HDLC; | |
6174 | ||
6175 | usc_DisableMasterIrqBit( info ); | |
6176 | ||
6177 | usc_set_sdlc_mode( info ); | |
6178 | usc_enable_loopback( info, 1 ); | |
6179 | ||
6180 | /* Write 16-bit Time Constant for BRG0 */ | |
6181 | usc_OutReg( info, TC0R, 0 ); | |
6182 | ||
6183 | /* Channel Control Register (CCR) | |
6184 | * | |
6185 | * <15..14> 00 Don't use 32-bit Tx Control Blocks (TCBs) | |
6186 | * <13> 0 Trigger Tx on SW Command Disabled | |
6187 | * <12> 0 Flag Preamble Disabled | |
6188 | * <11..10> 00 Preamble Length = 8-Bits | |
6189 | * <9..8> 01 Preamble Pattern = flags | |
6190 | * <7..6> 10 Don't use 32-bit Rx status Blocks (RSBs) | |
6191 | * <5> 0 Trigger Rx on SW Command Disabled | |
6192 | * <4..0> 0 reserved | |
6193 | * | |
6194 | * 0000 0001 0000 0000 = 0x0100 | |
6195 | */ | |
6196 | ||
6197 | usc_OutReg( info, CCR, 0x0100 ); | |
6198 | ||
6199 | /* SETUP RECEIVER */ | |
6200 | usc_RTCmd( info, RTCmd_PurgeRxFifo ); | |
6201 | usc_EnableReceiver(info,ENABLE_UNCONDITIONAL); | |
6202 | ||
6203 | /* SETUP TRANSMITTER */ | |
6204 | /* Program the Transmit Character Length Register (TCLR) */ | |
6205 | /* and clear FIFO (TCC is loaded with TCLR on FIFO clear) */ | |
6206 | usc_OutReg( info, TCLR, 2 ); | |
6207 | usc_RTCmd( info, RTCmd_PurgeTxFifo ); | |
6208 | ||
6209 | /* unlatch Tx status bits, and start transmit channel. */ | |
6210 | usc_UnlatchTxstatusBits(info,TXSTATUS_ALL); | |
6211 | outw(0,info->io_base + DATAREG); | |
6212 | ||
6213 | /* ENABLE TRANSMITTER */ | |
6214 | usc_TCmd( info, TCmd_SendFrame ); | |
6215 | usc_EnableTransmitter(info,ENABLE_UNCONDITIONAL); | |
6216 | ||
6217 | /* WAIT FOR RECEIVE COMPLETE */ | |
6218 | for (i=0 ; i<1000 ; i++) | |
6219 | if (usc_InReg( info, RCSR ) & (BIT8 + BIT4 + BIT3 + BIT1)) | |
6220 | break; | |
6221 | ||
6222 | /* clear Internal Data loopback mode */ | |
6223 | usc_enable_loopback(info, 0); | |
6224 | ||
6225 | usc_EnableMasterIrqBit(info); | |
6226 | ||
6227 | info->params.mode = oldmode; | |
6228 | ||
6229 | } /* end of usc_loopback_frame() */ | |
6230 | ||
6231 | /* usc_set_sync_mode() Programs the USC for SDLC communications. | |
6232 | * | |
6233 | * Arguments: info pointer to adapter info structure | |
6234 | * Return Value: None | |
6235 | */ | |
6236 | static void usc_set_sync_mode( struct mgsl_struct *info ) | |
6237 | { | |
6238 | usc_loopback_frame( info ); | |
6239 | usc_set_sdlc_mode( info ); | |
6240 | ||
6241 | if (info->bus_type == MGSL_BUS_TYPE_ISA) { | |
6242 | /* Enable INTEN (Port 6, Bit12) */ | |
6243 | /* This connects the IRQ request signal to the ISA bus */ | |
6244 | usc_OutReg(info, PCR, (u16)((usc_InReg(info, PCR) | BIT13) & ~BIT12)); | |
6245 | } | |
6246 | ||
6247 | usc_enable_aux_clock(info, info->params.clock_speed); | |
6248 | ||
6249 | if (info->params.loopback) | |
6250 | usc_enable_loopback(info,1); | |
6251 | ||
6252 | } /* end of mgsl_set_sync_mode() */ | |
6253 | ||
6254 | /* usc_set_txidle() Set the HDLC idle mode for the transmitter. | |
6255 | * | |
6256 | * Arguments: info pointer to device instance data | |
6257 | * Return Value: None | |
6258 | */ | |
6259 | static void usc_set_txidle( struct mgsl_struct *info ) | |
6260 | { | |
6261 | u16 usc_idle_mode = IDLEMODE_FLAGS; | |
6262 | ||
6263 | /* Map API idle mode to USC register bits */ | |
6264 | ||
6265 | switch( info->idle_mode ){ | |
6266 | case HDLC_TXIDLE_FLAGS: usc_idle_mode = IDLEMODE_FLAGS; break; | |
6267 | case HDLC_TXIDLE_ALT_ZEROS_ONES: usc_idle_mode = IDLEMODE_ALT_ONE_ZERO; break; | |
6268 | case HDLC_TXIDLE_ZEROS: usc_idle_mode = IDLEMODE_ZERO; break; | |
6269 | case HDLC_TXIDLE_ONES: usc_idle_mode = IDLEMODE_ONE; break; | |
6270 | case HDLC_TXIDLE_ALT_MARK_SPACE: usc_idle_mode = IDLEMODE_ALT_MARK_SPACE; break; | |
6271 | case HDLC_TXIDLE_SPACE: usc_idle_mode = IDLEMODE_SPACE; break; | |
6272 | case HDLC_TXIDLE_MARK: usc_idle_mode = IDLEMODE_MARK; break; | |
6273 | } | |
6274 | ||
6275 | info->usc_idle_mode = usc_idle_mode; | |
6276 | //usc_OutReg(info, TCSR, usc_idle_mode); | |
6277 | info->tcsr_value &= ~IDLEMODE_MASK; /* clear idle mode bits */ | |
6278 | info->tcsr_value += usc_idle_mode; | |
6279 | usc_OutReg(info, TCSR, info->tcsr_value); | |
6280 | ||
6281 | /* | |
6282 | * if SyncLink WAN adapter is running in external sync mode, the | |
6283 | * transmitter has been set to Monosync in order to try to mimic | |
6284 | * a true raw outbound bit stream. Monosync still sends an open/close | |
6285 | * sync char at the start/end of a frame. Try to match those sync | |
6286 | * patterns to the idle mode set here | |
6287 | */ | |
6288 | if ( info->params.mode == MGSL_MODE_RAW ) { | |
6289 | unsigned char syncpat = 0; | |
6290 | switch( info->idle_mode ) { | |
6291 | case HDLC_TXIDLE_FLAGS: | |
6292 | syncpat = 0x7e; | |
6293 | break; | |
6294 | case HDLC_TXIDLE_ALT_ZEROS_ONES: | |
6295 | syncpat = 0x55; | |
6296 | break; | |
6297 | case HDLC_TXIDLE_ZEROS: | |
6298 | case HDLC_TXIDLE_SPACE: | |
6299 | syncpat = 0x00; | |
6300 | break; | |
6301 | case HDLC_TXIDLE_ONES: | |
6302 | case HDLC_TXIDLE_MARK: | |
6303 | syncpat = 0xff; | |
6304 | break; | |
6305 | case HDLC_TXIDLE_ALT_MARK_SPACE: | |
6306 | syncpat = 0xaa; | |
6307 | break; | |
6308 | } | |
6309 | ||
6310 | usc_SetTransmitSyncChars(info,syncpat,syncpat); | |
6311 | } | |
6312 | ||
6313 | } /* end of usc_set_txidle() */ | |
6314 | ||
6315 | /* usc_get_serial_signals() | |
6316 | * | |
6317 | * Query the adapter for the state of the V24 status (input) signals. | |
6318 | * | |
6319 | * Arguments: info pointer to device instance data | |
6320 | * Return Value: None | |
6321 | */ | |
6322 | static void usc_get_serial_signals( struct mgsl_struct *info ) | |
6323 | { | |
6324 | u16 status; | |
6325 | ||
6326 | /* clear all serial signals except DTR and RTS */ | |
6327 | info->serial_signals &= SerialSignal_DTR + SerialSignal_RTS; | |
6328 | ||
6329 | /* Read the Misc Interrupt status Register (MISR) to get */ | |
6330 | /* the V24 status signals. */ | |
6331 | ||
6332 | status = usc_InReg( info, MISR ); | |
6333 | ||
6334 | /* set serial signal bits to reflect MISR */ | |
6335 | ||
6336 | if ( status & MISCSTATUS_CTS ) | |
6337 | info->serial_signals |= SerialSignal_CTS; | |
6338 | ||
6339 | if ( status & MISCSTATUS_DCD ) | |
6340 | info->serial_signals |= SerialSignal_DCD; | |
6341 | ||
6342 | if ( status & MISCSTATUS_RI ) | |
6343 | info->serial_signals |= SerialSignal_RI; | |
6344 | ||
6345 | if ( status & MISCSTATUS_DSR ) | |
6346 | info->serial_signals |= SerialSignal_DSR; | |
6347 | ||
6348 | } /* end of usc_get_serial_signals() */ | |
6349 | ||
6350 | /* usc_set_serial_signals() | |
6351 | * | |
6352 | * Set the state of DTR and RTS based on contents of | |
6353 | * serial_signals member of device extension. | |
6354 | * | |
6355 | * Arguments: info pointer to device instance data | |
6356 | * Return Value: None | |
6357 | */ | |
6358 | static void usc_set_serial_signals( struct mgsl_struct *info ) | |
6359 | { | |
6360 | u16 Control; | |
6361 | unsigned char V24Out = info->serial_signals; | |
6362 | ||
6363 | /* get the current value of the Port Control Register (PCR) */ | |
6364 | ||
6365 | Control = usc_InReg( info, PCR ); | |
6366 | ||
6367 | if ( V24Out & SerialSignal_RTS ) | |
6368 | Control &= ~(BIT6); | |
6369 | else | |
6370 | Control |= BIT6; | |
6371 | ||
6372 | if ( V24Out & SerialSignal_DTR ) | |
6373 | Control &= ~(BIT4); | |
6374 | else | |
6375 | Control |= BIT4; | |
6376 | ||
6377 | usc_OutReg( info, PCR, Control ); | |
6378 | ||
6379 | } /* end of usc_set_serial_signals() */ | |
6380 | ||
6381 | /* usc_enable_async_clock() | |
6382 | * | |
6383 | * Enable the async clock at the specified frequency. | |
6384 | * | |
6385 | * Arguments: info pointer to device instance data | |
6386 | * data_rate data rate of clock in bps | |
6387 | * 0 disables the AUX clock. | |
6388 | * Return Value: None | |
6389 | */ | |
6390 | static void usc_enable_async_clock( struct mgsl_struct *info, u32 data_rate ) | |
6391 | { | |
6392 | if ( data_rate ) { | |
6393 | /* | |
6394 | * Clock mode Control Register (CMCR) | |
6395 | * | |
6396 | * <15..14> 00 counter 1 Disabled | |
6397 | * <13..12> 00 counter 0 Disabled | |
6398 | * <11..10> 11 BRG1 Input is TxC Pin | |
6399 | * <9..8> 11 BRG0 Input is TxC Pin | |
6400 | * <7..6> 01 DPLL Input is BRG1 Output | |
6401 | * <5..3> 100 TxCLK comes from BRG0 | |
6402 | * <2..0> 100 RxCLK comes from BRG0 | |
6403 | * | |
6404 | * 0000 1111 0110 0100 = 0x0f64 | |
6405 | */ | |
6406 | ||
6407 | usc_OutReg( info, CMCR, 0x0f64 ); | |
6408 | ||
6409 | ||
6410 | /* | |
6411 | * Write 16-bit Time Constant for BRG0 | |
6412 | * Time Constant = (ClkSpeed / data_rate) - 1 | |
6413 | * ClkSpeed = 921600 (ISA), 691200 (PCI) | |
6414 | */ | |
6415 | ||
6416 | if ( info->bus_type == MGSL_BUS_TYPE_PCI ) | |
6417 | usc_OutReg( info, TC0R, (u16)((691200/data_rate) - 1) ); | |
6418 | else | |
6419 | usc_OutReg( info, TC0R, (u16)((921600/data_rate) - 1) ); | |
6420 | ||
6421 | ||
6422 | /* | |
6423 | * Hardware Configuration Register (HCR) | |
6424 | * Clear Bit 1, BRG0 mode = Continuous | |
6425 | * Set Bit 0 to enable BRG0. | |
6426 | */ | |
6427 | ||
6428 | usc_OutReg( info, HCR, | |
6429 | (u16)((usc_InReg( info, HCR ) & ~BIT1) | BIT0) ); | |
6430 | ||
6431 | ||
6432 | /* Input/Output Control Reg, <2..0> = 100, Drive RxC pin with BRG0 */ | |
6433 | ||
6434 | usc_OutReg( info, IOCR, | |
6435 | (u16)((usc_InReg(info, IOCR) & 0xfff8) | 0x0004) ); | |
6436 | } else { | |
6437 | /* data rate == 0 so turn off BRG0 */ | |
6438 | usc_OutReg( info, HCR, (u16)(usc_InReg( info, HCR ) & ~BIT0) ); | |
6439 | } | |
6440 | ||
6441 | } /* end of usc_enable_async_clock() */ | |
6442 | ||
6443 | /* | |
6444 | * Buffer Structures: | |
6445 | * | |
6446 | * Normal memory access uses virtual addresses that can make discontiguous | |
6447 | * physical memory pages appear to be contiguous in the virtual address | |
6448 | * space (the processors memory mapping handles the conversions). | |
6449 | * | |
6450 | * DMA transfers require physically contiguous memory. This is because | |
6451 | * the DMA system controller and DMA bus masters deal with memory using | |
6452 | * only physical addresses. | |
6453 | * | |
6454 | * This causes a problem under Windows NT when large DMA buffers are | |
6455 | * needed. Fragmentation of the nonpaged pool prevents allocations of | |
6456 | * physically contiguous buffers larger than the PAGE_SIZE. | |
6457 | * | |
6458 | * However the 16C32 supports Bus Master Scatter/Gather DMA which | |
6459 | * allows DMA transfers to physically discontiguous buffers. Information | |
6460 | * about each data transfer buffer is contained in a memory structure | |
6461 | * called a 'buffer entry'. A list of buffer entries is maintained | |
6462 | * to track and control the use of the data transfer buffers. | |
6463 | * | |
6464 | * To support this strategy we will allocate sufficient PAGE_SIZE | |
6465 | * contiguous memory buffers to allow for the total required buffer | |
6466 | * space. | |
6467 | * | |
6468 | * The 16C32 accesses the list of buffer entries using Bus Master | |
6469 | * DMA. Control information is read from the buffer entries by the | |
6470 | * 16C32 to control data transfers. status information is written to | |
6471 | * the buffer entries by the 16C32 to indicate the status of completed | |
6472 | * transfers. | |
6473 | * | |
6474 | * The CPU writes control information to the buffer entries to control | |
6475 | * the 16C32 and reads status information from the buffer entries to | |
6476 | * determine information about received and transmitted frames. | |
6477 | * | |
6478 | * Because the CPU and 16C32 (adapter) both need simultaneous access | |
6479 | * to the buffer entries, the buffer entry memory is allocated with | |
6480 | * HalAllocateCommonBuffer(). This restricts the size of the buffer | |
6481 | * entry list to PAGE_SIZE. | |
6482 | * | |
6483 | * The actual data buffers on the other hand will only be accessed | |
6484 | * by the CPU or the adapter but not by both simultaneously. This allows | |
6485 | * Scatter/Gather packet based DMA procedures for using physically | |
6486 | * discontiguous pages. | |
6487 | */ | |
6488 | ||
6489 | /* | |
6490 | * mgsl_reset_tx_dma_buffers() | |
6491 | * | |
6492 | * Set the count for all transmit buffers to 0 to indicate the | |
6493 | * buffer is available for use and set the current buffer to the | |
6494 | * first buffer. This effectively makes all buffers free and | |
6495 | * discards any data in buffers. | |
6496 | * | |
6497 | * Arguments: info pointer to device instance data | |
6498 | * Return Value: None | |
6499 | */ | |
6500 | static void mgsl_reset_tx_dma_buffers( struct mgsl_struct *info ) | |
6501 | { | |
6502 | unsigned int i; | |
6503 | ||
6504 | for ( i = 0; i < info->tx_buffer_count; i++ ) { | |
6505 | *((unsigned long *)&(info->tx_buffer_list[i].count)) = 0; | |
6506 | } | |
6507 | ||
6508 | info->current_tx_buffer = 0; | |
6509 | info->start_tx_dma_buffer = 0; | |
6510 | info->tx_dma_buffers_used = 0; | |
6511 | ||
6512 | info->get_tx_holding_index = 0; | |
6513 | info->put_tx_holding_index = 0; | |
6514 | info->tx_holding_count = 0; | |
6515 | ||
6516 | } /* end of mgsl_reset_tx_dma_buffers() */ | |
6517 | ||
6518 | /* | |
6519 | * num_free_tx_dma_buffers() | |
6520 | * | |
6521 | * returns the number of free tx dma buffers available | |
6522 | * | |
6523 | * Arguments: info pointer to device instance data | |
6524 | * Return Value: number of free tx dma buffers | |
6525 | */ | |
6526 | static int num_free_tx_dma_buffers(struct mgsl_struct *info) | |
6527 | { | |
6528 | return info->tx_buffer_count - info->tx_dma_buffers_used; | |
6529 | } | |
6530 | ||
6531 | /* | |
6532 | * mgsl_reset_rx_dma_buffers() | |
6533 | * | |
6534 | * Set the count for all receive buffers to DMABUFFERSIZE | |
6535 | * and set the current buffer to the first buffer. This effectively | |
6536 | * makes all buffers free and discards any data in buffers. | |
6537 | * | |
6538 | * Arguments: info pointer to device instance data | |
6539 | * Return Value: None | |
6540 | */ | |
6541 | static void mgsl_reset_rx_dma_buffers( struct mgsl_struct *info ) | |
6542 | { | |
6543 | unsigned int i; | |
6544 | ||
6545 | for ( i = 0; i < info->rx_buffer_count; i++ ) { | |
6546 | *((unsigned long *)&(info->rx_buffer_list[i].count)) = DMABUFFERSIZE; | |
6547 | // info->rx_buffer_list[i].count = DMABUFFERSIZE; | |
6548 | // info->rx_buffer_list[i].status = 0; | |
6549 | } | |
6550 | ||
6551 | info->current_rx_buffer = 0; | |
6552 | ||
6553 | } /* end of mgsl_reset_rx_dma_buffers() */ | |
6554 | ||
6555 | /* | |
6556 | * mgsl_free_rx_frame_buffers() | |
6557 | * | |
6558 | * Free the receive buffers used by a received SDLC | |
6559 | * frame such that the buffers can be reused. | |
6560 | * | |
6561 | * Arguments: | |
6562 | * | |
6563 | * info pointer to device instance data | |
6564 | * StartIndex index of 1st receive buffer of frame | |
6565 | * EndIndex index of last receive buffer of frame | |
6566 | * | |
6567 | * Return Value: None | |
6568 | */ | |
6569 | static void mgsl_free_rx_frame_buffers( struct mgsl_struct *info, unsigned int StartIndex, unsigned int EndIndex ) | |
6570 | { | |
6571 | int Done = 0; | |
6572 | DMABUFFERENTRY *pBufEntry; | |
6573 | unsigned int Index; | |
6574 | ||
6575 | /* Starting with 1st buffer entry of the frame clear the status */ | |
6576 | /* field and set the count field to DMA Buffer Size. */ | |
6577 | ||
6578 | Index = StartIndex; | |
6579 | ||
6580 | while( !Done ) { | |
6581 | pBufEntry = &(info->rx_buffer_list[Index]); | |
6582 | ||
6583 | if ( Index == EndIndex ) { | |
6584 | /* This is the last buffer of the frame! */ | |
6585 | Done = 1; | |
6586 | } | |
6587 | ||
6588 | /* reset current buffer for reuse */ | |
6589 | // pBufEntry->status = 0; | |
6590 | // pBufEntry->count = DMABUFFERSIZE; | |
6591 | *((unsigned long *)&(pBufEntry->count)) = DMABUFFERSIZE; | |
6592 | ||
6593 | /* advance to next buffer entry in linked list */ | |
6594 | Index++; | |
6595 | if ( Index == info->rx_buffer_count ) | |
6596 | Index = 0; | |
6597 | } | |
6598 | ||
6599 | /* set current buffer to next buffer after last buffer of frame */ | |
6600 | info->current_rx_buffer = Index; | |
6601 | ||
6602 | } /* end of free_rx_frame_buffers() */ | |
6603 | ||
6604 | /* mgsl_get_rx_frame() | |
6605 | * | |
6606 | * This function attempts to return a received SDLC frame from the | |
6607 | * receive DMA buffers. Only frames received without errors are returned. | |
6608 | * | |
6609 | * Arguments: info pointer to device extension | |
6610 | * Return Value: 1 if frame returned, otherwise 0 | |
6611 | */ | |
6612 | static int mgsl_get_rx_frame(struct mgsl_struct *info) | |
6613 | { | |
6614 | unsigned int StartIndex, EndIndex; /* index of 1st and last buffers of Rx frame */ | |
6615 | unsigned short status; | |
6616 | DMABUFFERENTRY *pBufEntry; | |
6617 | unsigned int framesize = 0; | |
6618 | int ReturnCode = 0; | |
6619 | unsigned long flags; | |
6620 | struct tty_struct *tty = info->tty; | |
6621 | int return_frame = 0; | |
6622 | ||
6623 | /* | |
6624 | * current_rx_buffer points to the 1st buffer of the next available | |
6625 | * receive frame. To find the last buffer of the frame look for | |
6626 | * a non-zero status field in the buffer entries. (The status | |
6627 | * field is set by the 16C32 after completing a receive frame. | |
6628 | */ | |
6629 | ||
6630 | StartIndex = EndIndex = info->current_rx_buffer; | |
6631 | ||
6632 | while( !info->rx_buffer_list[EndIndex].status ) { | |
6633 | /* | |
6634 | * If the count field of the buffer entry is non-zero then | |
6635 | * this buffer has not been used. (The 16C32 clears the count | |
6636 | * field when it starts using the buffer.) If an unused buffer | |
6637 | * is encountered then there are no frames available. | |
6638 | */ | |
6639 | ||
6640 | if ( info->rx_buffer_list[EndIndex].count ) | |
6641 | goto Cleanup; | |
6642 | ||
6643 | /* advance to next buffer entry in linked list */ | |
6644 | EndIndex++; | |
6645 | if ( EndIndex == info->rx_buffer_count ) | |
6646 | EndIndex = 0; | |
6647 | ||
6648 | /* if entire list searched then no frame available */ | |
6649 | if ( EndIndex == StartIndex ) { | |
6650 | /* If this occurs then something bad happened, | |
6651 | * all buffers have been 'used' but none mark | |
6652 | * the end of a frame. Reset buffers and receiver. | |
6653 | */ | |
6654 | ||
6655 | if ( info->rx_enabled ){ | |
6656 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
6657 | usc_start_receiver(info); | |
6658 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
6659 | } | |
6660 | goto Cleanup; | |
6661 | } | |
6662 | } | |
6663 | ||
6664 | ||
6665 | /* check status of receive frame */ | |
6666 | ||
6667 | status = info->rx_buffer_list[EndIndex].status; | |
6668 | ||
6669 | if ( status & (RXSTATUS_SHORT_FRAME + RXSTATUS_OVERRUN + | |
6670 | RXSTATUS_CRC_ERROR + RXSTATUS_ABORT) ) { | |
6671 | if ( status & RXSTATUS_SHORT_FRAME ) | |
6672 | info->icount.rxshort++; | |
6673 | else if ( status & RXSTATUS_ABORT ) | |
6674 | info->icount.rxabort++; | |
6675 | else if ( status & RXSTATUS_OVERRUN ) | |
6676 | info->icount.rxover++; | |
6677 | else { | |
6678 | info->icount.rxcrc++; | |
6679 | if ( info->params.crc_type & HDLC_CRC_RETURN_EX ) | |
6680 | return_frame = 1; | |
6681 | } | |
6682 | framesize = 0; | |
6683 | #ifdef CONFIG_HDLC | |
6684 | { | |
6685 | struct net_device_stats *stats = hdlc_stats(info->netdev); | |
6686 | stats->rx_errors++; | |
6687 | stats->rx_frame_errors++; | |
6688 | } | |
6689 | #endif | |
6690 | } else | |
6691 | return_frame = 1; | |
6692 | ||
6693 | if ( return_frame ) { | |
6694 | /* receive frame has no errors, get frame size. | |
6695 | * The frame size is the starting value of the RCC (which was | |
6696 | * set to 0xffff) minus the ending value of the RCC (decremented | |
6697 | * once for each receive character) minus 2 for the 16-bit CRC. | |
6698 | */ | |
6699 | ||
6700 | framesize = RCLRVALUE - info->rx_buffer_list[EndIndex].rcc; | |
6701 | ||
6702 | /* adjust frame size for CRC if any */ | |
6703 | if ( info->params.crc_type == HDLC_CRC_16_CCITT ) | |
6704 | framesize -= 2; | |
6705 | else if ( info->params.crc_type == HDLC_CRC_32_CCITT ) | |
6706 | framesize -= 4; | |
6707 | } | |
6708 | ||
6709 | if ( debug_level >= DEBUG_LEVEL_BH ) | |
6710 | printk("%s(%d):mgsl_get_rx_frame(%s) status=%04X size=%d\n", | |
6711 | __FILE__,__LINE__,info->device_name,status,framesize); | |
6712 | ||
6713 | if ( debug_level >= DEBUG_LEVEL_DATA ) | |
6714 | mgsl_trace_block(info,info->rx_buffer_list[StartIndex].virt_addr, | |
6715 | min_t(int, framesize, DMABUFFERSIZE),0); | |
6716 | ||
6717 | if (framesize) { | |
6718 | if ( ( (info->params.crc_type & HDLC_CRC_RETURN_EX) && | |
6719 | ((framesize+1) > info->max_frame_size) ) || | |
6720 | (framesize > info->max_frame_size) ) | |
6721 | info->icount.rxlong++; | |
6722 | else { | |
6723 | /* copy dma buffer(s) to contiguous intermediate buffer */ | |
6724 | int copy_count = framesize; | |
6725 | int index = StartIndex; | |
6726 | unsigned char *ptmp = info->intermediate_rxbuffer; | |
6727 | ||
6728 | if ( !(status & RXSTATUS_CRC_ERROR)) | |
6729 | info->icount.rxok++; | |
6730 | ||
6731 | while(copy_count) { | |
6732 | int partial_count; | |
6733 | if ( copy_count > DMABUFFERSIZE ) | |
6734 | partial_count = DMABUFFERSIZE; | |
6735 | else | |
6736 | partial_count = copy_count; | |
6737 | ||
6738 | pBufEntry = &(info->rx_buffer_list[index]); | |
6739 | memcpy( ptmp, pBufEntry->virt_addr, partial_count ); | |
6740 | ptmp += partial_count; | |
6741 | copy_count -= partial_count; | |
6742 | ||
6743 | if ( ++index == info->rx_buffer_count ) | |
6744 | index = 0; | |
6745 | } | |
6746 | ||
6747 | if ( info->params.crc_type & HDLC_CRC_RETURN_EX ) { | |
6748 | ++framesize; | |
6749 | *ptmp = (status & RXSTATUS_CRC_ERROR ? | |
6750 | RX_CRC_ERROR : | |
6751 | RX_OK); | |
6752 | ||
6753 | if ( debug_level >= DEBUG_LEVEL_DATA ) | |
6754 | printk("%s(%d):mgsl_get_rx_frame(%s) rx frame status=%d\n", | |
6755 | __FILE__,__LINE__,info->device_name, | |
6756 | *ptmp); | |
6757 | } | |
6758 | ||
6759 | #ifdef CONFIG_HDLC | |
6760 | if (info->netcount) | |
6761 | hdlcdev_rx(info,info->intermediate_rxbuffer,framesize); | |
6762 | else | |
6763 | #endif | |
6764 | ldisc_receive_buf(tty, info->intermediate_rxbuffer, info->flag_buf, framesize); | |
6765 | } | |
6766 | } | |
6767 | /* Free the buffers used by this frame. */ | |
6768 | mgsl_free_rx_frame_buffers( info, StartIndex, EndIndex ); | |
6769 | ||
6770 | ReturnCode = 1; | |
6771 | ||
6772 | Cleanup: | |
6773 | ||
6774 | if ( info->rx_enabled && info->rx_overflow ) { | |
6775 | /* The receiver needs to restarted because of | |
6776 | * a receive overflow (buffer or FIFO). If the | |
6777 | * receive buffers are now empty, then restart receiver. | |
6778 | */ | |
6779 | ||
6780 | if ( !info->rx_buffer_list[EndIndex].status && | |
6781 | info->rx_buffer_list[EndIndex].count ) { | |
6782 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
6783 | usc_start_receiver(info); | |
6784 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
6785 | } | |
6786 | } | |
6787 | ||
6788 | return ReturnCode; | |
6789 | ||
6790 | } /* end of mgsl_get_rx_frame() */ | |
6791 | ||
6792 | /* mgsl_get_raw_rx_frame() | |
6793 | * | |
6794 | * This function attempts to return a received frame from the | |
6795 | * receive DMA buffers when running in external loop mode. In this mode, | |
6796 | * we will return at most one DMABUFFERSIZE frame to the application. | |
6797 | * The USC receiver is triggering off of DCD going active to start a new | |
6798 | * frame, and DCD going inactive to terminate the frame (similar to | |
6799 | * processing a closing flag character). | |
6800 | * | |
6801 | * In this routine, we will return DMABUFFERSIZE "chunks" at a time. | |
6802 | * If DCD goes inactive, the last Rx DMA Buffer will have a non-zero | |
6803 | * status field and the RCC field will indicate the length of the | |
6804 | * entire received frame. We take this RCC field and get the modulus | |
6805 | * of RCC and DMABUFFERSIZE to determine if number of bytes in the | |
6806 | * last Rx DMA buffer and return that last portion of the frame. | |
6807 | * | |
6808 | * Arguments: info pointer to device extension | |
6809 | * Return Value: 1 if frame returned, otherwise 0 | |
6810 | */ | |
6811 | static int mgsl_get_raw_rx_frame(struct mgsl_struct *info) | |
6812 | { | |
6813 | unsigned int CurrentIndex, NextIndex; | |
6814 | unsigned short status; | |
6815 | DMABUFFERENTRY *pBufEntry; | |
6816 | unsigned int framesize = 0; | |
6817 | int ReturnCode = 0; | |
6818 | unsigned long flags; | |
6819 | struct tty_struct *tty = info->tty; | |
6820 | ||
6821 | /* | |
6822 | * current_rx_buffer points to the 1st buffer of the next available | |
6823 | * receive frame. The status field is set by the 16C32 after | |
6824 | * completing a receive frame. If the status field of this buffer | |
6825 | * is zero, either the USC is still filling this buffer or this | |
6826 | * is one of a series of buffers making up a received frame. | |
6827 | * | |
6828 | * If the count field of this buffer is zero, the USC is either | |
6829 | * using this buffer or has used this buffer. Look at the count | |
6830 | * field of the next buffer. If that next buffer's count is | |
6831 | * non-zero, the USC is still actively using the current buffer. | |
6832 | * Otherwise, if the next buffer's count field is zero, the | |
6833 | * current buffer is complete and the USC is using the next | |
6834 | * buffer. | |
6835 | */ | |
6836 | CurrentIndex = NextIndex = info->current_rx_buffer; | |
6837 | ++NextIndex; | |
6838 | if ( NextIndex == info->rx_buffer_count ) | |
6839 | NextIndex = 0; | |
6840 | ||
6841 | if ( info->rx_buffer_list[CurrentIndex].status != 0 || | |
6842 | (info->rx_buffer_list[CurrentIndex].count == 0 && | |
6843 | info->rx_buffer_list[NextIndex].count == 0)) { | |
6844 | /* | |
6845 | * Either the status field of this dma buffer is non-zero | |
6846 | * (indicating the last buffer of a receive frame) or the next | |
6847 | * buffer is marked as in use -- implying this buffer is complete | |
6848 | * and an intermediate buffer for this received frame. | |
6849 | */ | |
6850 | ||
6851 | status = info->rx_buffer_list[CurrentIndex].status; | |
6852 | ||
6853 | if ( status & (RXSTATUS_SHORT_FRAME + RXSTATUS_OVERRUN + | |
6854 | RXSTATUS_CRC_ERROR + RXSTATUS_ABORT) ) { | |
6855 | if ( status & RXSTATUS_SHORT_FRAME ) | |
6856 | info->icount.rxshort++; | |
6857 | else if ( status & RXSTATUS_ABORT ) | |
6858 | info->icount.rxabort++; | |
6859 | else if ( status & RXSTATUS_OVERRUN ) | |
6860 | info->icount.rxover++; | |
6861 | else | |
6862 | info->icount.rxcrc++; | |
6863 | framesize = 0; | |
6864 | } else { | |
6865 | /* | |
6866 | * A receive frame is available, get frame size and status. | |
6867 | * | |
6868 | * The frame size is the starting value of the RCC (which was | |
6869 | * set to 0xffff) minus the ending value of the RCC (decremented | |
6870 | * once for each receive character) minus 2 or 4 for the 16-bit | |
6871 | * or 32-bit CRC. | |
6872 | * | |
6873 | * If the status field is zero, this is an intermediate buffer. | |
6874 | * It's size is 4K. | |
6875 | * | |
6876 | * If the DMA Buffer Entry's Status field is non-zero, the | |
6877 | * receive operation completed normally (ie: DCD dropped). The | |
6878 | * RCC field is valid and holds the received frame size. | |
6879 | * It is possible that the RCC field will be zero on a DMA buffer | |
6880 | * entry with a non-zero status. This can occur if the total | |
6881 | * frame size (number of bytes between the time DCD goes active | |
6882 | * to the time DCD goes inactive) exceeds 65535 bytes. In this | |
6883 | * case the 16C32 has underrun on the RCC count and appears to | |
6884 | * stop updating this counter to let us know the actual received | |
6885 | * frame size. If this happens (non-zero status and zero RCC), | |
6886 | * simply return the entire RxDMA Buffer | |
6887 | */ | |
6888 | if ( status ) { | |
6889 | /* | |
6890 | * In the event that the final RxDMA Buffer is | |
6891 | * terminated with a non-zero status and the RCC | |
6892 | * field is zero, we interpret this as the RCC | |
6893 | * having underflowed (received frame > 65535 bytes). | |
6894 | * | |
6895 | * Signal the event to the user by passing back | |
6896 | * a status of RxStatus_CrcError returning the full | |
6897 | * buffer and let the app figure out what data is | |
6898 | * actually valid | |
6899 | */ | |
6900 | if ( info->rx_buffer_list[CurrentIndex].rcc ) | |
6901 | framesize = RCLRVALUE - info->rx_buffer_list[CurrentIndex].rcc; | |
6902 | else | |
6903 | framesize = DMABUFFERSIZE; | |
6904 | } | |
6905 | else | |
6906 | framesize = DMABUFFERSIZE; | |
6907 | } | |
6908 | ||
6909 | if ( framesize > DMABUFFERSIZE ) { | |
6910 | /* | |
6911 | * if running in raw sync mode, ISR handler for | |
6912 | * End Of Buffer events terminates all buffers at 4K. | |
6913 | * If this frame size is said to be >4K, get the | |
6914 | * actual number of bytes of the frame in this buffer. | |
6915 | */ | |
6916 | framesize = framesize % DMABUFFERSIZE; | |
6917 | } | |
6918 | ||
6919 | ||
6920 | if ( debug_level >= DEBUG_LEVEL_BH ) | |
6921 | printk("%s(%d):mgsl_get_raw_rx_frame(%s) status=%04X size=%d\n", | |
6922 | __FILE__,__LINE__,info->device_name,status,framesize); | |
6923 | ||
6924 | if ( debug_level >= DEBUG_LEVEL_DATA ) | |
6925 | mgsl_trace_block(info,info->rx_buffer_list[CurrentIndex].virt_addr, | |
6926 | min_t(int, framesize, DMABUFFERSIZE),0); | |
6927 | ||
6928 | if (framesize) { | |
6929 | /* copy dma buffer(s) to contiguous intermediate buffer */ | |
6930 | /* NOTE: we never copy more than DMABUFFERSIZE bytes */ | |
6931 | ||
6932 | pBufEntry = &(info->rx_buffer_list[CurrentIndex]); | |
6933 | memcpy( info->intermediate_rxbuffer, pBufEntry->virt_addr, framesize); | |
6934 | info->icount.rxok++; | |
6935 | ||
6936 | ldisc_receive_buf(tty, info->intermediate_rxbuffer, info->flag_buf, framesize); | |
6937 | } | |
6938 | ||
6939 | /* Free the buffers used by this frame. */ | |
6940 | mgsl_free_rx_frame_buffers( info, CurrentIndex, CurrentIndex ); | |
6941 | ||
6942 | ReturnCode = 1; | |
6943 | } | |
6944 | ||
6945 | ||
6946 | if ( info->rx_enabled && info->rx_overflow ) { | |
6947 | /* The receiver needs to restarted because of | |
6948 | * a receive overflow (buffer or FIFO). If the | |
6949 | * receive buffers are now empty, then restart receiver. | |
6950 | */ | |
6951 | ||
6952 | if ( !info->rx_buffer_list[CurrentIndex].status && | |
6953 | info->rx_buffer_list[CurrentIndex].count ) { | |
6954 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
6955 | usc_start_receiver(info); | |
6956 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
6957 | } | |
6958 | } | |
6959 | ||
6960 | return ReturnCode; | |
6961 | ||
6962 | } /* end of mgsl_get_raw_rx_frame() */ | |
6963 | ||
6964 | /* mgsl_load_tx_dma_buffer() | |
6965 | * | |
6966 | * Load the transmit DMA buffer with the specified data. | |
6967 | * | |
6968 | * Arguments: | |
6969 | * | |
6970 | * info pointer to device extension | |
6971 | * Buffer pointer to buffer containing frame to load | |
6972 | * BufferSize size in bytes of frame in Buffer | |
6973 | * | |
6974 | * Return Value: None | |
6975 | */ | |
6976 | static void mgsl_load_tx_dma_buffer(struct mgsl_struct *info, | |
6977 | const char *Buffer, unsigned int BufferSize) | |
6978 | { | |
6979 | unsigned short Copycount; | |
6980 | unsigned int i = 0; | |
6981 | DMABUFFERENTRY *pBufEntry; | |
6982 | ||
6983 | if ( debug_level >= DEBUG_LEVEL_DATA ) | |
6984 | mgsl_trace_block(info,Buffer, min_t(int, BufferSize, DMABUFFERSIZE), 1); | |
6985 | ||
6986 | if (info->params.flags & HDLC_FLAG_HDLC_LOOPMODE) { | |
6987 | /* set CMR:13 to start transmit when | |
6988 | * next GoAhead (abort) is received | |
6989 | */ | |
6990 | info->cmr_value |= BIT13; | |
6991 | } | |
6992 | ||
6993 | /* begin loading the frame in the next available tx dma | |
6994 | * buffer, remember it's starting location for setting | |
6995 | * up tx dma operation | |
6996 | */ | |
6997 | i = info->current_tx_buffer; | |
6998 | info->start_tx_dma_buffer = i; | |
6999 | ||
7000 | /* Setup the status and RCC (Frame Size) fields of the 1st */ | |
7001 | /* buffer entry in the transmit DMA buffer list. */ | |
7002 | ||
7003 | info->tx_buffer_list[i].status = info->cmr_value & 0xf000; | |
7004 | info->tx_buffer_list[i].rcc = BufferSize; | |
7005 | info->tx_buffer_list[i].count = BufferSize; | |
7006 | ||
7007 | /* Copy frame data from 1st source buffer to the DMA buffers. */ | |
7008 | /* The frame data may span multiple DMA buffers. */ | |
7009 | ||
7010 | while( BufferSize ){ | |
7011 | /* Get a pointer to next DMA buffer entry. */ | |
7012 | pBufEntry = &info->tx_buffer_list[i++]; | |
7013 | ||
7014 | if ( i == info->tx_buffer_count ) | |
7015 | i=0; | |
7016 | ||
7017 | /* Calculate the number of bytes that can be copied from */ | |
7018 | /* the source buffer to this DMA buffer. */ | |
7019 | if ( BufferSize > DMABUFFERSIZE ) | |
7020 | Copycount = DMABUFFERSIZE; | |
7021 | else | |
7022 | Copycount = BufferSize; | |
7023 | ||
7024 | /* Actually copy data from source buffer to DMA buffer. */ | |
7025 | /* Also set the data count for this individual DMA buffer. */ | |
7026 | if ( info->bus_type == MGSL_BUS_TYPE_PCI ) | |
7027 | mgsl_load_pci_memory(pBufEntry->virt_addr, Buffer,Copycount); | |
7028 | else | |
7029 | memcpy(pBufEntry->virt_addr, Buffer, Copycount); | |
7030 | ||
7031 | pBufEntry->count = Copycount; | |
7032 | ||
7033 | /* Advance source pointer and reduce remaining data count. */ | |
7034 | Buffer += Copycount; | |
7035 | BufferSize -= Copycount; | |
7036 | ||
7037 | ++info->tx_dma_buffers_used; | |
7038 | } | |
7039 | ||
7040 | /* remember next available tx dma buffer */ | |
7041 | info->current_tx_buffer = i; | |
7042 | ||
7043 | } /* end of mgsl_load_tx_dma_buffer() */ | |
7044 | ||
7045 | /* | |
7046 | * mgsl_register_test() | |
7047 | * | |
7048 | * Performs a register test of the 16C32. | |
7049 | * | |
7050 | * Arguments: info pointer to device instance data | |
7051 | * Return Value: TRUE if test passed, otherwise FALSE | |
7052 | */ | |
7053 | static BOOLEAN mgsl_register_test( struct mgsl_struct *info ) | |
7054 | { | |
7055 | static unsigned short BitPatterns[] = | |
7056 | { 0x0000, 0xffff, 0xaaaa, 0x5555, 0x1234, 0x6969, 0x9696, 0x0f0f }; | |
7057 | static unsigned int Patterncount = sizeof(BitPatterns)/sizeof(unsigned short); | |
7058 | unsigned int i; | |
7059 | BOOLEAN rc = TRUE; | |
7060 | unsigned long flags; | |
7061 | ||
7062 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
7063 | usc_reset(info); | |
7064 | ||
7065 | /* Verify the reset state of some registers. */ | |
7066 | ||
7067 | if ( (usc_InReg( info, SICR ) != 0) || | |
7068 | (usc_InReg( info, IVR ) != 0) || | |
7069 | (usc_InDmaReg( info, DIVR ) != 0) ){ | |
7070 | rc = FALSE; | |
7071 | } | |
7072 | ||
7073 | if ( rc == TRUE ){ | |
7074 | /* Write bit patterns to various registers but do it out of */ | |
7075 | /* sync, then read back and verify values. */ | |
7076 | ||
7077 | for ( i = 0 ; i < Patterncount ; i++ ) { | |
7078 | usc_OutReg( info, TC0R, BitPatterns[i] ); | |
7079 | usc_OutReg( info, TC1R, BitPatterns[(i+1)%Patterncount] ); | |
7080 | usc_OutReg( info, TCLR, BitPatterns[(i+2)%Patterncount] ); | |
7081 | usc_OutReg( info, RCLR, BitPatterns[(i+3)%Patterncount] ); | |
7082 | usc_OutReg( info, RSR, BitPatterns[(i+4)%Patterncount] ); | |
7083 | usc_OutDmaReg( info, TBCR, BitPatterns[(i+5)%Patterncount] ); | |
7084 | ||
7085 | if ( (usc_InReg( info, TC0R ) != BitPatterns[i]) || | |
7086 | (usc_InReg( info, TC1R ) != BitPatterns[(i+1)%Patterncount]) || | |
7087 | (usc_InReg( info, TCLR ) != BitPatterns[(i+2)%Patterncount]) || | |
7088 | (usc_InReg( info, RCLR ) != BitPatterns[(i+3)%Patterncount]) || | |
7089 | (usc_InReg( info, RSR ) != BitPatterns[(i+4)%Patterncount]) || | |
7090 | (usc_InDmaReg( info, TBCR ) != BitPatterns[(i+5)%Patterncount]) ){ | |
7091 | rc = FALSE; | |
7092 | break; | |
7093 | } | |
7094 | } | |
7095 | } | |
7096 | ||
7097 | usc_reset(info); | |
7098 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
7099 | ||
7100 | return rc; | |
7101 | ||
7102 | } /* end of mgsl_register_test() */ | |
7103 | ||
7104 | /* mgsl_irq_test() Perform interrupt test of the 16C32. | |
7105 | * | |
7106 | * Arguments: info pointer to device instance data | |
7107 | * Return Value: TRUE if test passed, otherwise FALSE | |
7108 | */ | |
7109 | static BOOLEAN mgsl_irq_test( struct mgsl_struct *info ) | |
7110 | { | |
7111 | unsigned long EndTime; | |
7112 | unsigned long flags; | |
7113 | ||
7114 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
7115 | usc_reset(info); | |
7116 | ||
7117 | /* | |
7118 | * Setup 16C32 to interrupt on TxC pin (14MHz clock) transition. | |
7119 | * The ISR sets irq_occurred to 1. | |
7120 | */ | |
7121 | ||
7122 | info->irq_occurred = FALSE; | |
7123 | ||
7124 | /* Enable INTEN gate for ISA adapter (Port 6, Bit12) */ | |
7125 | /* Enable INTEN (Port 6, Bit12) */ | |
7126 | /* This connects the IRQ request signal to the ISA bus */ | |
7127 | /* on the ISA adapter. This has no effect for the PCI adapter */ | |
7128 | usc_OutReg( info, PCR, (unsigned short)((usc_InReg(info, PCR) | BIT13) & ~BIT12) ); | |
7129 | ||
7130 | usc_EnableMasterIrqBit(info); | |
7131 | usc_EnableInterrupts(info, IO_PIN); | |
7132 | usc_ClearIrqPendingBits(info, IO_PIN); | |
7133 | ||
7134 | usc_UnlatchIostatusBits(info, MISCSTATUS_TXC_LATCHED); | |
7135 | usc_EnableStatusIrqs(info, SICR_TXC_ACTIVE + SICR_TXC_INACTIVE); | |
7136 | ||
7137 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
7138 | ||
7139 | EndTime=100; | |
7140 | while( EndTime-- && !info->irq_occurred ) { | |
7141 | msleep_interruptible(10); | |
7142 | } | |
7143 | ||
7144 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
7145 | usc_reset(info); | |
7146 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
7147 | ||
7148 | if ( !info->irq_occurred ) | |
7149 | return FALSE; | |
7150 | else | |
7151 | return TRUE; | |
7152 | ||
7153 | } /* end of mgsl_irq_test() */ | |
7154 | ||
7155 | /* mgsl_dma_test() | |
7156 | * | |
7157 | * Perform a DMA test of the 16C32. A small frame is | |
7158 | * transmitted via DMA from a transmit buffer to a receive buffer | |
7159 | * using single buffer DMA mode. | |
7160 | * | |
7161 | * Arguments: info pointer to device instance data | |
7162 | * Return Value: TRUE if test passed, otherwise FALSE | |
7163 | */ | |
7164 | static BOOLEAN mgsl_dma_test( struct mgsl_struct *info ) | |
7165 | { | |
7166 | unsigned short FifoLevel; | |
7167 | unsigned long phys_addr; | |
7168 | unsigned int FrameSize; | |
7169 | unsigned int i; | |
7170 | char *TmpPtr; | |
7171 | BOOLEAN rc = TRUE; | |
7172 | unsigned short status=0; | |
7173 | unsigned long EndTime; | |
7174 | unsigned long flags; | |
7175 | MGSL_PARAMS tmp_params; | |
7176 | ||
7177 | /* save current port options */ | |
7178 | memcpy(&tmp_params,&info->params,sizeof(MGSL_PARAMS)); | |
7179 | /* load default port options */ | |
7180 | memcpy(&info->params,&default_params,sizeof(MGSL_PARAMS)); | |
7181 | ||
7182 | #define TESTFRAMESIZE 40 | |
7183 | ||
7184 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
7185 | ||
7186 | /* setup 16C32 for SDLC DMA transfer mode */ | |
7187 | ||
7188 | usc_reset(info); | |
7189 | usc_set_sdlc_mode(info); | |
7190 | usc_enable_loopback(info,1); | |
7191 | ||
7192 | /* Reprogram the RDMR so that the 16C32 does NOT clear the count | |
7193 | * field of the buffer entry after fetching buffer address. This | |
7194 | * way we can detect a DMA failure for a DMA read (which should be | |
7195 | * non-destructive to system memory) before we try and write to | |
7196 | * memory (where a failure could corrupt system memory). | |
7197 | */ | |
7198 | ||
7199 | /* Receive DMA mode Register (RDMR) | |
7200 | * | |
7201 | * <15..14> 11 DMA mode = Linked List Buffer mode | |
7202 | * <13> 1 RSBinA/L = store Rx status Block in List entry | |
7203 | * <12> 0 1 = Clear count of List Entry after fetching | |
7204 | * <11..10> 00 Address mode = Increment | |
7205 | * <9> 1 Terminate Buffer on RxBound | |
7206 | * <8> 0 Bus Width = 16bits | |
7207 | * <7..0> ? status Bits (write as 0s) | |
7208 | * | |
7209 | * 1110 0010 0000 0000 = 0xe200 | |
7210 | */ | |
7211 | ||
7212 | usc_OutDmaReg( info, RDMR, 0xe200 ); | |
7213 | ||
7214 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
7215 | ||
7216 | ||
7217 | /* SETUP TRANSMIT AND RECEIVE DMA BUFFERS */ | |
7218 | ||
7219 | FrameSize = TESTFRAMESIZE; | |
7220 | ||
7221 | /* setup 1st transmit buffer entry: */ | |
7222 | /* with frame size and transmit control word */ | |
7223 | ||
7224 | info->tx_buffer_list[0].count = FrameSize; | |
7225 | info->tx_buffer_list[0].rcc = FrameSize; | |
7226 | info->tx_buffer_list[0].status = 0x4000; | |
7227 | ||
7228 | /* build a transmit frame in 1st transmit DMA buffer */ | |
7229 | ||
7230 | TmpPtr = info->tx_buffer_list[0].virt_addr; | |
7231 | for (i = 0; i < FrameSize; i++ ) | |
7232 | *TmpPtr++ = i; | |
7233 | ||
7234 | /* setup 1st receive buffer entry: */ | |
7235 | /* clear status, set max receive buffer size */ | |
7236 | ||
7237 | info->rx_buffer_list[0].status = 0; | |
7238 | info->rx_buffer_list[0].count = FrameSize + 4; | |
7239 | ||
7240 | /* zero out the 1st receive buffer */ | |
7241 | ||
7242 | memset( info->rx_buffer_list[0].virt_addr, 0, FrameSize + 4 ); | |
7243 | ||
7244 | /* Set count field of next buffer entries to prevent */ | |
7245 | /* 16C32 from using buffers after the 1st one. */ | |
7246 | ||
7247 | info->tx_buffer_list[1].count = 0; | |
7248 | info->rx_buffer_list[1].count = 0; | |
7249 | ||
7250 | ||
7251 | /***************************/ | |
7252 | /* Program 16C32 receiver. */ | |
7253 | /***************************/ | |
7254 | ||
7255 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
7256 | ||
7257 | /* setup DMA transfers */ | |
7258 | usc_RTCmd( info, RTCmd_PurgeRxFifo ); | |
7259 | ||
7260 | /* program 16C32 receiver with physical address of 1st DMA buffer entry */ | |
7261 | phys_addr = info->rx_buffer_list[0].phys_entry; | |
7262 | usc_OutDmaReg( info, NRARL, (unsigned short)phys_addr ); | |
7263 | usc_OutDmaReg( info, NRARU, (unsigned short)(phys_addr >> 16) ); | |
7264 | ||
7265 | /* Clear the Rx DMA status bits (read RDMR) and start channel */ | |
7266 | usc_InDmaReg( info, RDMR ); | |
7267 | usc_DmaCmd( info, DmaCmd_InitRxChannel ); | |
7268 | ||
7269 | /* Enable Receiver (RMR <1..0> = 10) */ | |
7270 | usc_OutReg( info, RMR, (unsigned short)((usc_InReg(info, RMR) & 0xfffc) | 0x0002) ); | |
7271 | ||
7272 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
7273 | ||
7274 | ||
7275 | /*************************************************************/ | |
7276 | /* WAIT FOR RECEIVER TO DMA ALL PARAMETERS FROM BUFFER ENTRY */ | |
7277 | /*************************************************************/ | |
7278 | ||
7279 | /* Wait 100ms for interrupt. */ | |
7280 | EndTime = jiffies + msecs_to_jiffies(100); | |
7281 | ||
7282 | for(;;) { | |
7283 | if (time_after(jiffies, EndTime)) { | |
7284 | rc = FALSE; | |
7285 | break; | |
7286 | } | |
7287 | ||
7288 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
7289 | status = usc_InDmaReg( info, RDMR ); | |
7290 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
7291 | ||
7292 | if ( !(status & BIT4) && (status & BIT5) ) { | |
7293 | /* INITG (BIT 4) is inactive (no entry read in progress) AND */ | |
7294 | /* BUSY (BIT 5) is active (channel still active). */ | |
7295 | /* This means the buffer entry read has completed. */ | |
7296 | break; | |
7297 | } | |
7298 | } | |
7299 | ||
7300 | ||
7301 | /******************************/ | |
7302 | /* Program 16C32 transmitter. */ | |
7303 | /******************************/ | |
7304 | ||
7305 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
7306 | ||
7307 | /* Program the Transmit Character Length Register (TCLR) */ | |
7308 | /* and clear FIFO (TCC is loaded with TCLR on FIFO clear) */ | |
7309 | ||
7310 | usc_OutReg( info, TCLR, (unsigned short)info->tx_buffer_list[0].count ); | |
7311 | usc_RTCmd( info, RTCmd_PurgeTxFifo ); | |
7312 | ||
7313 | /* Program the address of the 1st DMA Buffer Entry in linked list */ | |
7314 | ||
7315 | phys_addr = info->tx_buffer_list[0].phys_entry; | |
7316 | usc_OutDmaReg( info, NTARL, (unsigned short)phys_addr ); | |
7317 | usc_OutDmaReg( info, NTARU, (unsigned short)(phys_addr >> 16) ); | |
7318 | ||
7319 | /* unlatch Tx status bits, and start transmit channel. */ | |
7320 | ||
7321 | usc_OutReg( info, TCSR, (unsigned short)(( usc_InReg(info, TCSR) & 0x0f00) | 0xfa) ); | |
7322 | usc_DmaCmd( info, DmaCmd_InitTxChannel ); | |
7323 | ||
7324 | /* wait for DMA controller to fill transmit FIFO */ | |
7325 | ||
7326 | usc_TCmd( info, TCmd_SelectTicrTxFifostatus ); | |
7327 | ||
7328 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
7329 | ||
7330 | ||
7331 | /**********************************/ | |
7332 | /* WAIT FOR TRANSMIT FIFO TO FILL */ | |
7333 | /**********************************/ | |
7334 | ||
7335 | /* Wait 100ms */ | |
7336 | EndTime = jiffies + msecs_to_jiffies(100); | |
7337 | ||
7338 | for(;;) { | |
7339 | if (time_after(jiffies, EndTime)) { | |
7340 | rc = FALSE; | |
7341 | break; | |
7342 | } | |
7343 | ||
7344 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
7345 | FifoLevel = usc_InReg(info, TICR) >> 8; | |
7346 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
7347 | ||
7348 | if ( FifoLevel < 16 ) | |
7349 | break; | |
7350 | else | |
7351 | if ( FrameSize < 32 ) { | |
7352 | /* This frame is smaller than the entire transmit FIFO */ | |
7353 | /* so wait for the entire frame to be loaded. */ | |
7354 | if ( FifoLevel <= (32 - FrameSize) ) | |
7355 | break; | |
7356 | } | |
7357 | } | |
7358 | ||
7359 | ||
7360 | if ( rc == TRUE ) | |
7361 | { | |
7362 | /* Enable 16C32 transmitter. */ | |
7363 | ||
7364 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
7365 | ||
7366 | /* Transmit mode Register (TMR), <1..0> = 10, Enable Transmitter */ | |
7367 | usc_TCmd( info, TCmd_SendFrame ); | |
7368 | usc_OutReg( info, TMR, (unsigned short)((usc_InReg(info, TMR) & 0xfffc) | 0x0002) ); | |
7369 | ||
7370 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
7371 | ||
7372 | ||
7373 | /******************************/ | |
7374 | /* WAIT FOR TRANSMIT COMPLETE */ | |
7375 | /******************************/ | |
7376 | ||
7377 | /* Wait 100ms */ | |
7378 | EndTime = jiffies + msecs_to_jiffies(100); | |
7379 | ||
7380 | /* While timer not expired wait for transmit complete */ | |
7381 | ||
7382 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
7383 | status = usc_InReg( info, TCSR ); | |
7384 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
7385 | ||
7386 | while ( !(status & (BIT6+BIT5+BIT4+BIT2+BIT1)) ) { | |
7387 | if (time_after(jiffies, EndTime)) { | |
7388 | rc = FALSE; | |
7389 | break; | |
7390 | } | |
7391 | ||
7392 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
7393 | status = usc_InReg( info, TCSR ); | |
7394 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
7395 | } | |
7396 | } | |
7397 | ||
7398 | ||
7399 | if ( rc == TRUE ){ | |
7400 | /* CHECK FOR TRANSMIT ERRORS */ | |
7401 | if ( status & (BIT5 + BIT1) ) | |
7402 | rc = FALSE; | |
7403 | } | |
7404 | ||
7405 | if ( rc == TRUE ) { | |
7406 | /* WAIT FOR RECEIVE COMPLETE */ | |
7407 | ||
7408 | /* Wait 100ms */ | |
7409 | EndTime = jiffies + msecs_to_jiffies(100); | |
7410 | ||
7411 | /* Wait for 16C32 to write receive status to buffer entry. */ | |
7412 | status=info->rx_buffer_list[0].status; | |
7413 | while ( status == 0 ) { | |
7414 | if (time_after(jiffies, EndTime)) { | |
7415 | rc = FALSE; | |
7416 | break; | |
7417 | } | |
7418 | status=info->rx_buffer_list[0].status; | |
7419 | } | |
7420 | } | |
7421 | ||
7422 | ||
7423 | if ( rc == TRUE ) { | |
7424 | /* CHECK FOR RECEIVE ERRORS */ | |
7425 | status = info->rx_buffer_list[0].status; | |
7426 | ||
7427 | if ( status & (BIT8 + BIT3 + BIT1) ) { | |
7428 | /* receive error has occurred */ | |
7429 | rc = FALSE; | |
7430 | } else { | |
7431 | if ( memcmp( info->tx_buffer_list[0].virt_addr , | |
7432 | info->rx_buffer_list[0].virt_addr, FrameSize ) ){ | |
7433 | rc = FALSE; | |
7434 | } | |
7435 | } | |
7436 | } | |
7437 | ||
7438 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
7439 | usc_reset( info ); | |
7440 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
7441 | ||
7442 | /* restore current port options */ | |
7443 | memcpy(&info->params,&tmp_params,sizeof(MGSL_PARAMS)); | |
7444 | ||
7445 | return rc; | |
7446 | ||
7447 | } /* end of mgsl_dma_test() */ | |
7448 | ||
7449 | /* mgsl_adapter_test() | |
7450 | * | |
7451 | * Perform the register, IRQ, and DMA tests for the 16C32. | |
7452 | * | |
7453 | * Arguments: info pointer to device instance data | |
7454 | * Return Value: 0 if success, otherwise -ENODEV | |
7455 | */ | |
7456 | static int mgsl_adapter_test( struct mgsl_struct *info ) | |
7457 | { | |
7458 | if ( debug_level >= DEBUG_LEVEL_INFO ) | |
7459 | printk( "%s(%d):Testing device %s\n", | |
7460 | __FILE__,__LINE__,info->device_name ); | |
7461 | ||
7462 | if ( !mgsl_register_test( info ) ) { | |
7463 | info->init_error = DiagStatus_AddressFailure; | |
7464 | printk( "%s(%d):Register test failure for device %s Addr=%04X\n", | |
7465 | __FILE__,__LINE__,info->device_name, (unsigned short)(info->io_base) ); | |
7466 | return -ENODEV; | |
7467 | } | |
7468 | ||
7469 | if ( !mgsl_irq_test( info ) ) { | |
7470 | info->init_error = DiagStatus_IrqFailure; | |
7471 | printk( "%s(%d):Interrupt test failure for device %s IRQ=%d\n", | |
7472 | __FILE__,__LINE__,info->device_name, (unsigned short)(info->irq_level) ); | |
7473 | return -ENODEV; | |
7474 | } | |
7475 | ||
7476 | if ( !mgsl_dma_test( info ) ) { | |
7477 | info->init_error = DiagStatus_DmaFailure; | |
7478 | printk( "%s(%d):DMA test failure for device %s DMA=%d\n", | |
7479 | __FILE__,__LINE__,info->device_name, (unsigned short)(info->dma_level) ); | |
7480 | return -ENODEV; | |
7481 | } | |
7482 | ||
7483 | if ( debug_level >= DEBUG_LEVEL_INFO ) | |
7484 | printk( "%s(%d):device %s passed diagnostics\n", | |
7485 | __FILE__,__LINE__,info->device_name ); | |
7486 | ||
7487 | return 0; | |
7488 | ||
7489 | } /* end of mgsl_adapter_test() */ | |
7490 | ||
7491 | /* mgsl_memory_test() | |
7492 | * | |
7493 | * Test the shared memory on a PCI adapter. | |
7494 | * | |
7495 | * Arguments: info pointer to device instance data | |
7496 | * Return Value: TRUE if test passed, otherwise FALSE | |
7497 | */ | |
7498 | static BOOLEAN mgsl_memory_test( struct mgsl_struct *info ) | |
7499 | { | |
7500 | static unsigned long BitPatterns[] = { 0x0, 0x55555555, 0xaaaaaaaa, | |
7501 | 0x66666666, 0x99999999, 0xffffffff, 0x12345678 }; | |
7502 | unsigned long Patterncount = sizeof(BitPatterns)/sizeof(unsigned long); | |
7503 | unsigned long i; | |
7504 | unsigned long TestLimit = SHARED_MEM_ADDRESS_SIZE/sizeof(unsigned long); | |
7505 | unsigned long * TestAddr; | |
7506 | ||
7507 | if ( info->bus_type != MGSL_BUS_TYPE_PCI ) | |
7508 | return TRUE; | |
7509 | ||
7510 | TestAddr = (unsigned long *)info->memory_base; | |
7511 | ||
7512 | /* Test data lines with test pattern at one location. */ | |
7513 | ||
7514 | for ( i = 0 ; i < Patterncount ; i++ ) { | |
7515 | *TestAddr = BitPatterns[i]; | |
7516 | if ( *TestAddr != BitPatterns[i] ) | |
7517 | return FALSE; | |
7518 | } | |
7519 | ||
7520 | /* Test address lines with incrementing pattern over */ | |
7521 | /* entire address range. */ | |
7522 | ||
7523 | for ( i = 0 ; i < TestLimit ; i++ ) { | |
7524 | *TestAddr = i * 4; | |
7525 | TestAddr++; | |
7526 | } | |
7527 | ||
7528 | TestAddr = (unsigned long *)info->memory_base; | |
7529 | ||
7530 | for ( i = 0 ; i < TestLimit ; i++ ) { | |
7531 | if ( *TestAddr != i * 4 ) | |
7532 | return FALSE; | |
7533 | TestAddr++; | |
7534 | } | |
7535 | ||
7536 | memset( info->memory_base, 0, SHARED_MEM_ADDRESS_SIZE ); | |
7537 | ||
7538 | return TRUE; | |
7539 | ||
7540 | } /* End Of mgsl_memory_test() */ | |
7541 | ||
7542 | ||
7543 | /* mgsl_load_pci_memory() | |
7544 | * | |
7545 | * Load a large block of data into the PCI shared memory. | |
7546 | * Use this instead of memcpy() or memmove() to move data | |
7547 | * into the PCI shared memory. | |
7548 | * | |
7549 | * Notes: | |
7550 | * | |
7551 | * This function prevents the PCI9050 interface chip from hogging | |
7552 | * the adapter local bus, which can starve the 16C32 by preventing | |
7553 | * 16C32 bus master cycles. | |
7554 | * | |
7555 | * The PCI9050 documentation says that the 9050 will always release | |
7556 | * control of the local bus after completing the current read | |
7557 | * or write operation. | |
7558 | * | |
7559 | * It appears that as long as the PCI9050 write FIFO is full, the | |
7560 | * PCI9050 treats all of the writes as a single burst transaction | |
7561 | * and will not release the bus. This causes DMA latency problems | |
7562 | * at high speeds when copying large data blocks to the shared | |
7563 | * memory. | |
7564 | * | |
7565 | * This function in effect, breaks the a large shared memory write | |
7566 | * into multiple transations by interleaving a shared memory read | |
7567 | * which will flush the write FIFO and 'complete' the write | |
7568 | * transation. This allows any pending DMA request to gain control | |
7569 | * of the local bus in a timely fasion. | |
7570 | * | |
7571 | * Arguments: | |
7572 | * | |
7573 | * TargetPtr pointer to target address in PCI shared memory | |
7574 | * SourcePtr pointer to source buffer for data | |
7575 | * count count in bytes of data to copy | |
7576 | * | |
7577 | * Return Value: None | |
7578 | */ | |
7579 | static void mgsl_load_pci_memory( char* TargetPtr, const char* SourcePtr, | |
7580 | unsigned short count ) | |
7581 | { | |
7582 | /* 16 32-bit writes @ 60ns each = 960ns max latency on local bus */ | |
7583 | #define PCI_LOAD_INTERVAL 64 | |
7584 | ||
7585 | unsigned short Intervalcount = count / PCI_LOAD_INTERVAL; | |
7586 | unsigned short Index; | |
7587 | unsigned long Dummy; | |
7588 | ||
7589 | for ( Index = 0 ; Index < Intervalcount ; Index++ ) | |
7590 | { | |
7591 | memcpy(TargetPtr, SourcePtr, PCI_LOAD_INTERVAL); | |
7592 | Dummy = *((volatile unsigned long *)TargetPtr); | |
7593 | TargetPtr += PCI_LOAD_INTERVAL; | |
7594 | SourcePtr += PCI_LOAD_INTERVAL; | |
7595 | } | |
7596 | ||
7597 | memcpy( TargetPtr, SourcePtr, count % PCI_LOAD_INTERVAL ); | |
7598 | ||
7599 | } /* End Of mgsl_load_pci_memory() */ | |
7600 | ||
7601 | static void mgsl_trace_block(struct mgsl_struct *info,const char* data, int count, int xmit) | |
7602 | { | |
7603 | int i; | |
7604 | int linecount; | |
7605 | if (xmit) | |
7606 | printk("%s tx data:\n",info->device_name); | |
7607 | else | |
7608 | printk("%s rx data:\n",info->device_name); | |
7609 | ||
7610 | while(count) { | |
7611 | if (count > 16) | |
7612 | linecount = 16; | |
7613 | else | |
7614 | linecount = count; | |
7615 | ||
7616 | for(i=0;i<linecount;i++) | |
7617 | printk("%02X ",(unsigned char)data[i]); | |
7618 | for(;i<17;i++) | |
7619 | printk(" "); | |
7620 | for(i=0;i<linecount;i++) { | |
7621 | if (data[i]>=040 && data[i]<=0176) | |
7622 | printk("%c",data[i]); | |
7623 | else | |
7624 | printk("."); | |
7625 | } | |
7626 | printk("\n"); | |
7627 | ||
7628 | data += linecount; | |
7629 | count -= linecount; | |
7630 | } | |
7631 | } /* end of mgsl_trace_block() */ | |
7632 | ||
7633 | /* mgsl_tx_timeout() | |
7634 | * | |
7635 | * called when HDLC frame times out | |
7636 | * update stats and do tx completion processing | |
7637 | * | |
7638 | * Arguments: context pointer to device instance data | |
7639 | * Return Value: None | |
7640 | */ | |
7641 | static void mgsl_tx_timeout(unsigned long context) | |
7642 | { | |
7643 | struct mgsl_struct *info = (struct mgsl_struct*)context; | |
7644 | unsigned long flags; | |
7645 | ||
7646 | if ( debug_level >= DEBUG_LEVEL_INFO ) | |
7647 | printk( "%s(%d):mgsl_tx_timeout(%s)\n", | |
7648 | __FILE__,__LINE__,info->device_name); | |
7649 | if(info->tx_active && | |
7650 | (info->params.mode == MGSL_MODE_HDLC || | |
7651 | info->params.mode == MGSL_MODE_RAW) ) { | |
7652 | info->icount.txtimeout++; | |
7653 | } | |
7654 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
7655 | info->tx_active = 0; | |
7656 | info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; | |
7657 | ||
7658 | if ( info->params.flags & HDLC_FLAG_HDLC_LOOPMODE ) | |
7659 | usc_loopmode_cancel_transmit( info ); | |
7660 | ||
7661 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
7662 | ||
7663 | #ifdef CONFIG_HDLC | |
7664 | if (info->netcount) | |
7665 | hdlcdev_tx_done(info); | |
7666 | else | |
7667 | #endif | |
7668 | mgsl_bh_transmit(info); | |
7669 | ||
7670 | } /* end of mgsl_tx_timeout() */ | |
7671 | ||
7672 | /* signal that there are no more frames to send, so that | |
7673 | * line is 'released' by echoing RxD to TxD when current | |
7674 | * transmission is complete (or immediately if no tx in progress). | |
7675 | */ | |
7676 | static int mgsl_loopmode_send_done( struct mgsl_struct * info ) | |
7677 | { | |
7678 | unsigned long flags; | |
7679 | ||
7680 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
7681 | if (info->params.flags & HDLC_FLAG_HDLC_LOOPMODE) { | |
7682 | if (info->tx_active) | |
7683 | info->loopmode_send_done_requested = TRUE; | |
7684 | else | |
7685 | usc_loopmode_send_done(info); | |
7686 | } | |
7687 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
7688 | ||
7689 | return 0; | |
7690 | } | |
7691 | ||
7692 | /* release the line by echoing RxD to TxD | |
7693 | * upon completion of a transmit frame | |
7694 | */ | |
7695 | static void usc_loopmode_send_done( struct mgsl_struct * info ) | |
7696 | { | |
7697 | info->loopmode_send_done_requested = FALSE; | |
7698 | /* clear CMR:13 to 0 to start echoing RxData to TxData */ | |
7699 | info->cmr_value &= ~BIT13; | |
7700 | usc_OutReg(info, CMR, info->cmr_value); | |
7701 | } | |
7702 | ||
7703 | /* abort a transmit in progress while in HDLC LoopMode | |
7704 | */ | |
7705 | static void usc_loopmode_cancel_transmit( struct mgsl_struct * info ) | |
7706 | { | |
7707 | /* reset tx dma channel and purge TxFifo */ | |
7708 | usc_RTCmd( info, RTCmd_PurgeTxFifo ); | |
7709 | usc_DmaCmd( info, DmaCmd_ResetTxChannel ); | |
7710 | usc_loopmode_send_done( info ); | |
7711 | } | |
7712 | ||
7713 | /* for HDLC/SDLC LoopMode, setting CMR:13 after the transmitter is enabled | |
7714 | * is an Insert Into Loop action. Upon receipt of a GoAhead sequence (RxAbort) | |
7715 | * we must clear CMR:13 to begin repeating TxData to RxData | |
7716 | */ | |
7717 | static void usc_loopmode_insert_request( struct mgsl_struct * info ) | |
7718 | { | |
7719 | info->loopmode_insert_requested = TRUE; | |
7720 | ||
7721 | /* enable RxAbort irq. On next RxAbort, clear CMR:13 to | |
7722 | * begin repeating TxData on RxData (complete insertion) | |
7723 | */ | |
7724 | usc_OutReg( info, RICR, | |
7725 | (usc_InReg( info, RICR ) | RXSTATUS_ABORT_RECEIVED ) ); | |
7726 | ||
7727 | /* set CMR:13 to insert into loop on next GoAhead (RxAbort) */ | |
7728 | info->cmr_value |= BIT13; | |
7729 | usc_OutReg(info, CMR, info->cmr_value); | |
7730 | } | |
7731 | ||
7732 | /* return 1 if station is inserted into the loop, otherwise 0 | |
7733 | */ | |
7734 | static int usc_loopmode_active( struct mgsl_struct * info) | |
7735 | { | |
7736 | return usc_InReg( info, CCSR ) & BIT7 ? 1 : 0 ; | |
7737 | } | |
7738 | ||
7739 | #ifdef CONFIG_HDLC | |
7740 | ||
7741 | /** | |
7742 | * called by generic HDLC layer when protocol selected (PPP, frame relay, etc.) | |
7743 | * set encoding and frame check sequence (FCS) options | |
7744 | * | |
7745 | * dev pointer to network device structure | |
7746 | * encoding serial encoding setting | |
7747 | * parity FCS setting | |
7748 | * | |
7749 | * returns 0 if success, otherwise error code | |
7750 | */ | |
7751 | static int hdlcdev_attach(struct net_device *dev, unsigned short encoding, | |
7752 | unsigned short parity) | |
7753 | { | |
7754 | struct mgsl_struct *info = dev_to_port(dev); | |
7755 | unsigned char new_encoding; | |
7756 | unsigned short new_crctype; | |
7757 | ||
7758 | /* return error if TTY interface open */ | |
7759 | if (info->count) | |
7760 | return -EBUSY; | |
7761 | ||
7762 | switch (encoding) | |
7763 | { | |
7764 | case ENCODING_NRZ: new_encoding = HDLC_ENCODING_NRZ; break; | |
7765 | case ENCODING_NRZI: new_encoding = HDLC_ENCODING_NRZI_SPACE; break; | |
7766 | case ENCODING_FM_MARK: new_encoding = HDLC_ENCODING_BIPHASE_MARK; break; | |
7767 | case ENCODING_FM_SPACE: new_encoding = HDLC_ENCODING_BIPHASE_SPACE; break; | |
7768 | case ENCODING_MANCHESTER: new_encoding = HDLC_ENCODING_BIPHASE_LEVEL; break; | |
7769 | default: return -EINVAL; | |
7770 | } | |
7771 | ||
7772 | switch (parity) | |
7773 | { | |
7774 | case PARITY_NONE: new_crctype = HDLC_CRC_NONE; break; | |
7775 | case PARITY_CRC16_PR1_CCITT: new_crctype = HDLC_CRC_16_CCITT; break; | |
7776 | case PARITY_CRC32_PR1_CCITT: new_crctype = HDLC_CRC_32_CCITT; break; | |
7777 | default: return -EINVAL; | |
7778 | } | |
7779 | ||
7780 | info->params.encoding = new_encoding; | |
7781 | info->params.crc_type = new_crctype;; | |
7782 | ||
7783 | /* if network interface up, reprogram hardware */ | |
7784 | if (info->netcount) | |
7785 | mgsl_program_hw(info); | |
7786 | ||
7787 | return 0; | |
7788 | } | |
7789 | ||
7790 | /** | |
7791 | * called by generic HDLC layer to send frame | |
7792 | * | |
7793 | * skb socket buffer containing HDLC frame | |
7794 | * dev pointer to network device structure | |
7795 | * | |
7796 | * returns 0 if success, otherwise error code | |
7797 | */ | |
7798 | static int hdlcdev_xmit(struct sk_buff *skb, struct net_device *dev) | |
7799 | { | |
7800 | struct mgsl_struct *info = dev_to_port(dev); | |
7801 | struct net_device_stats *stats = hdlc_stats(dev); | |
7802 | unsigned long flags; | |
7803 | ||
7804 | if (debug_level >= DEBUG_LEVEL_INFO) | |
7805 | printk(KERN_INFO "%s:hdlc_xmit(%s)\n",__FILE__,dev->name); | |
7806 | ||
7807 | /* stop sending until this frame completes */ | |
7808 | netif_stop_queue(dev); | |
7809 | ||
7810 | /* copy data to device buffers */ | |
7811 | info->xmit_cnt = skb->len; | |
7812 | mgsl_load_tx_dma_buffer(info, skb->data, skb->len); | |
7813 | ||
7814 | /* update network statistics */ | |
7815 | stats->tx_packets++; | |
7816 | stats->tx_bytes += skb->len; | |
7817 | ||
7818 | /* done with socket buffer, so free it */ | |
7819 | dev_kfree_skb(skb); | |
7820 | ||
7821 | /* save start time for transmit timeout detection */ | |
7822 | dev->trans_start = jiffies; | |
7823 | ||
7824 | /* start hardware transmitter if necessary */ | |
7825 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
7826 | if (!info->tx_active) | |
7827 | usc_start_transmitter(info); | |
7828 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
7829 | ||
7830 | return 0; | |
7831 | } | |
7832 | ||
7833 | /** | |
7834 | * called by network layer when interface enabled | |
7835 | * claim resources and initialize hardware | |
7836 | * | |
7837 | * dev pointer to network device structure | |
7838 | * | |
7839 | * returns 0 if success, otherwise error code | |
7840 | */ | |
7841 | static int hdlcdev_open(struct net_device *dev) | |
7842 | { | |
7843 | struct mgsl_struct *info = dev_to_port(dev); | |
7844 | int rc; | |
7845 | unsigned long flags; | |
7846 | ||
7847 | if (debug_level >= DEBUG_LEVEL_INFO) | |
7848 | printk("%s:hdlcdev_open(%s)\n",__FILE__,dev->name); | |
7849 | ||
7850 | /* generic HDLC layer open processing */ | |
7851 | if ((rc = hdlc_open(dev))) | |
7852 | return rc; | |
7853 | ||
7854 | /* arbitrate between network and tty opens */ | |
7855 | spin_lock_irqsave(&info->netlock, flags); | |
7856 | if (info->count != 0 || info->netcount != 0) { | |
7857 | printk(KERN_WARNING "%s: hdlc_open returning busy\n", dev->name); | |
7858 | spin_unlock_irqrestore(&info->netlock, flags); | |
7859 | return -EBUSY; | |
7860 | } | |
7861 | info->netcount=1; | |
7862 | spin_unlock_irqrestore(&info->netlock, flags); | |
7863 | ||
7864 | /* claim resources and init adapter */ | |
7865 | if ((rc = startup(info)) != 0) { | |
7866 | spin_lock_irqsave(&info->netlock, flags); | |
7867 | info->netcount=0; | |
7868 | spin_unlock_irqrestore(&info->netlock, flags); | |
7869 | return rc; | |
7870 | } | |
7871 | ||
7872 | /* assert DTR and RTS, apply hardware settings */ | |
7873 | info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR; | |
7874 | mgsl_program_hw(info); | |
7875 | ||
7876 | /* enable network layer transmit */ | |
7877 | dev->trans_start = jiffies; | |
7878 | netif_start_queue(dev); | |
7879 | ||
7880 | /* inform generic HDLC layer of current DCD status */ | |
7881 | spin_lock_irqsave(&info->irq_spinlock, flags); | |
7882 | usc_get_serial_signals(info); | |
7883 | spin_unlock_irqrestore(&info->irq_spinlock, flags); | |
7884 | hdlc_set_carrier(info->serial_signals & SerialSignal_DCD, dev); | |
7885 | ||
7886 | return 0; | |
7887 | } | |
7888 | ||
7889 | /** | |
7890 | * called by network layer when interface is disabled | |
7891 | * shutdown hardware and release resources | |
7892 | * | |
7893 | * dev pointer to network device structure | |
7894 | * | |
7895 | * returns 0 if success, otherwise error code | |
7896 | */ | |
7897 | static int hdlcdev_close(struct net_device *dev) | |
7898 | { | |
7899 | struct mgsl_struct *info = dev_to_port(dev); | |
7900 | unsigned long flags; | |
7901 | ||
7902 | if (debug_level >= DEBUG_LEVEL_INFO) | |
7903 | printk("%s:hdlcdev_close(%s)\n",__FILE__,dev->name); | |
7904 | ||
7905 | netif_stop_queue(dev); | |
7906 | ||
7907 | /* shutdown adapter and release resources */ | |
7908 | shutdown(info); | |
7909 | ||
7910 | hdlc_close(dev); | |
7911 | ||
7912 | spin_lock_irqsave(&info->netlock, flags); | |
7913 | info->netcount=0; | |
7914 | spin_unlock_irqrestore(&info->netlock, flags); | |
7915 | ||
7916 | return 0; | |
7917 | } | |
7918 | ||
7919 | /** | |
7920 | * called by network layer to process IOCTL call to network device | |
7921 | * | |
7922 | * dev pointer to network device structure | |
7923 | * ifr pointer to network interface request structure | |
7924 | * cmd IOCTL command code | |
7925 | * | |
7926 | * returns 0 if success, otherwise error code | |
7927 | */ | |
7928 | static int hdlcdev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) | |
7929 | { | |
7930 | const size_t size = sizeof(sync_serial_settings); | |
7931 | sync_serial_settings new_line; | |
7932 | sync_serial_settings __user *line = ifr->ifr_settings.ifs_ifsu.sync; | |
7933 | struct mgsl_struct *info = dev_to_port(dev); | |
7934 | unsigned int flags; | |
7935 | ||
7936 | if (debug_level >= DEBUG_LEVEL_INFO) | |
7937 | printk("%s:hdlcdev_ioctl(%s)\n",__FILE__,dev->name); | |
7938 | ||
7939 | /* return error if TTY interface open */ | |
7940 | if (info->count) | |
7941 | return -EBUSY; | |
7942 | ||
7943 | if (cmd != SIOCWANDEV) | |
7944 | return hdlc_ioctl(dev, ifr, cmd); | |
7945 | ||
7946 | switch(ifr->ifr_settings.type) { | |
7947 | case IF_GET_IFACE: /* return current sync_serial_settings */ | |
7948 | ||
7949 | ifr->ifr_settings.type = IF_IFACE_SYNC_SERIAL; | |
7950 | if (ifr->ifr_settings.size < size) { | |
7951 | ifr->ifr_settings.size = size; /* data size wanted */ | |
7952 | return -ENOBUFS; | |
7953 | } | |
7954 | ||
7955 | flags = info->params.flags & (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL | | |
7956 | HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN | | |
7957 | HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL | | |
7958 | HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); | |
7959 | ||
7960 | switch (flags){ | |
7961 | case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN): new_line.clock_type = CLOCK_EXT; break; | |
7962 | case (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_INT; break; | |
7963 | case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_TXINT; break; | |
7964 | case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN): new_line.clock_type = CLOCK_TXFROMRX; break; | |
7965 | default: new_line.clock_type = CLOCK_DEFAULT; | |
7966 | } | |
7967 | ||
7968 | new_line.clock_rate = info->params.clock_speed; | |
7969 | new_line.loopback = info->params.loopback ? 1:0; | |
7970 | ||
7971 | if (copy_to_user(line, &new_line, size)) | |
7972 | return -EFAULT; | |
7973 | return 0; | |
7974 | ||
7975 | case IF_IFACE_SYNC_SERIAL: /* set sync_serial_settings */ | |
7976 | ||
7977 | if(!capable(CAP_NET_ADMIN)) | |
7978 | return -EPERM; | |
7979 | if (copy_from_user(&new_line, line, size)) | |
7980 | return -EFAULT; | |
7981 | ||
7982 | switch (new_line.clock_type) | |
7983 | { | |
7984 | case CLOCK_EXT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN; break; | |
7985 | case CLOCK_TXFROMRX: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN; break; | |
7986 | case CLOCK_INT: flags = HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG; break; | |
7987 | case CLOCK_TXINT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG; break; | |
7988 | case CLOCK_DEFAULT: flags = info->params.flags & | |
7989 | (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL | | |
7990 | HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN | | |
7991 | HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL | | |
7992 | HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); break; | |
7993 | default: return -EINVAL; | |
7994 | } | |
7995 | ||
7996 | if (new_line.loopback != 0 && new_line.loopback != 1) | |
7997 | return -EINVAL; | |
7998 | ||
7999 | info->params.flags &= ~(HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL | | |
8000 | HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN | | |
8001 | HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL | | |
8002 | HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); | |
8003 | info->params.flags |= flags; | |
8004 | ||
8005 | info->params.loopback = new_line.loopback; | |
8006 | ||
8007 | if (flags & (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG)) | |
8008 | info->params.clock_speed = new_line.clock_rate; | |
8009 | else | |
8010 | info->params.clock_speed = 0; | |
8011 | ||
8012 | /* if network interface up, reprogram hardware */ | |
8013 | if (info->netcount) | |
8014 | mgsl_program_hw(info); | |
8015 | return 0; | |
8016 | ||
8017 | default: | |
8018 | return hdlc_ioctl(dev, ifr, cmd); | |
8019 | } | |
8020 | } | |
8021 | ||
8022 | /** | |
8023 | * called by network layer when transmit timeout is detected | |
8024 | * | |
8025 | * dev pointer to network device structure | |
8026 | */ | |
8027 | static void hdlcdev_tx_timeout(struct net_device *dev) | |
8028 | { | |
8029 | struct mgsl_struct *info = dev_to_port(dev); | |
8030 | struct net_device_stats *stats = hdlc_stats(dev); | |
8031 | unsigned long flags; | |
8032 | ||
8033 | if (debug_level >= DEBUG_LEVEL_INFO) | |
8034 | printk("hdlcdev_tx_timeout(%s)\n",dev->name); | |
8035 | ||
8036 | stats->tx_errors++; | |
8037 | stats->tx_aborted_errors++; | |
8038 | ||
8039 | spin_lock_irqsave(&info->irq_spinlock,flags); | |
8040 | usc_stop_transmitter(info); | |
8041 | spin_unlock_irqrestore(&info->irq_spinlock,flags); | |
8042 | ||
8043 | netif_wake_queue(dev); | |
8044 | } | |
8045 | ||
8046 | /** | |
8047 | * called by device driver when transmit completes | |
8048 | * reenable network layer transmit if stopped | |
8049 | * | |
8050 | * info pointer to device instance information | |
8051 | */ | |
8052 | static void hdlcdev_tx_done(struct mgsl_struct *info) | |
8053 | { | |
8054 | if (netif_queue_stopped(info->netdev)) | |
8055 | netif_wake_queue(info->netdev); | |
8056 | } | |
8057 | ||
8058 | /** | |
8059 | * called by device driver when frame received | |
8060 | * pass frame to network layer | |
8061 | * | |
8062 | * info pointer to device instance information | |
8063 | * buf pointer to buffer contianing frame data | |
8064 | * size count of data bytes in buf | |
8065 | */ | |
8066 | static void hdlcdev_rx(struct mgsl_struct *info, char *buf, int size) | |
8067 | { | |
8068 | struct sk_buff *skb = dev_alloc_skb(size); | |
8069 | struct net_device *dev = info->netdev; | |
8070 | struct net_device_stats *stats = hdlc_stats(dev); | |
8071 | ||
8072 | if (debug_level >= DEBUG_LEVEL_INFO) | |
8073 | printk("hdlcdev_rx(%s)\n",dev->name); | |
8074 | ||
8075 | if (skb == NULL) { | |
8076 | printk(KERN_NOTICE "%s: can't alloc skb, dropping packet\n", dev->name); | |
8077 | stats->rx_dropped++; | |
8078 | return; | |
8079 | } | |
8080 | ||
8081 | memcpy(skb_put(skb, size),buf,size); | |
8082 | ||
8083 | skb->protocol = hdlc_type_trans(skb, info->netdev); | |
8084 | ||
8085 | stats->rx_packets++; | |
8086 | stats->rx_bytes += size; | |
8087 | ||
8088 | netif_rx(skb); | |
8089 | ||
8090 | info->netdev->last_rx = jiffies; | |
8091 | } | |
8092 | ||
8093 | /** | |
8094 | * called by device driver when adding device instance | |
8095 | * do generic HDLC initialization | |
8096 | * | |
8097 | * info pointer to device instance information | |
8098 | * | |
8099 | * returns 0 if success, otherwise error code | |
8100 | */ | |
8101 | static int hdlcdev_init(struct mgsl_struct *info) | |
8102 | { | |
8103 | int rc; | |
8104 | struct net_device *dev; | |
8105 | hdlc_device *hdlc; | |
8106 | ||
8107 | /* allocate and initialize network and HDLC layer objects */ | |
8108 | ||
8109 | if (!(dev = alloc_hdlcdev(info))) { | |
8110 | printk(KERN_ERR "%s:hdlc device allocation failure\n",__FILE__); | |
8111 | return -ENOMEM; | |
8112 | } | |
8113 | ||
8114 | /* for network layer reporting purposes only */ | |
8115 | dev->base_addr = info->io_base; | |
8116 | dev->irq = info->irq_level; | |
8117 | dev->dma = info->dma_level; | |
8118 | ||
8119 | /* network layer callbacks and settings */ | |
8120 | dev->do_ioctl = hdlcdev_ioctl; | |
8121 | dev->open = hdlcdev_open; | |
8122 | dev->stop = hdlcdev_close; | |
8123 | dev->tx_timeout = hdlcdev_tx_timeout; | |
8124 | dev->watchdog_timeo = 10*HZ; | |
8125 | dev->tx_queue_len = 50; | |
8126 | ||
8127 | /* generic HDLC layer callbacks and settings */ | |
8128 | hdlc = dev_to_hdlc(dev); | |
8129 | hdlc->attach = hdlcdev_attach; | |
8130 | hdlc->xmit = hdlcdev_xmit; | |
8131 | ||
8132 | /* register objects with HDLC layer */ | |
8133 | if ((rc = register_hdlc_device(dev))) { | |
8134 | printk(KERN_WARNING "%s:unable to register hdlc device\n",__FILE__); | |
8135 | free_netdev(dev); | |
8136 | return rc; | |
8137 | } | |
8138 | ||
8139 | info->netdev = dev; | |
8140 | return 0; | |
8141 | } | |
8142 | ||
8143 | /** | |
8144 | * called by device driver when removing device instance | |
8145 | * do generic HDLC cleanup | |
8146 | * | |
8147 | * info pointer to device instance information | |
8148 | */ | |
8149 | static void hdlcdev_exit(struct mgsl_struct *info) | |
8150 | { | |
8151 | unregister_hdlc_device(info->netdev); | |
8152 | free_netdev(info->netdev); | |
8153 | info->netdev = NULL; | |
8154 | } | |
8155 | ||
8156 | #endif /* CONFIG_HDLC */ | |
8157 | ||
8158 | ||
8159 | static int __devinit synclink_init_one (struct pci_dev *dev, | |
8160 | const struct pci_device_id *ent) | |
8161 | { | |
8162 | struct mgsl_struct *info; | |
8163 | ||
8164 | if (pci_enable_device(dev)) { | |
8165 | printk("error enabling pci device %p\n", dev); | |
8166 | return -EIO; | |
8167 | } | |
8168 | ||
8169 | if (!(info = mgsl_allocate_device())) { | |
8170 | printk("can't allocate device instance data.\n"); | |
8171 | return -EIO; | |
8172 | } | |
8173 | ||
8174 | /* Copy user configuration info to device instance data */ | |
8175 | ||
8176 | info->io_base = pci_resource_start(dev, 2); | |
8177 | info->irq_level = dev->irq; | |
8178 | info->phys_memory_base = pci_resource_start(dev, 3); | |
8179 | ||
8180 | /* Because veremap only works on page boundaries we must map | |
8181 | * a larger area than is actually implemented for the LCR | |
8182 | * memory range. We map a full page starting at the page boundary. | |
8183 | */ | |
8184 | info->phys_lcr_base = pci_resource_start(dev, 0); | |
8185 | info->lcr_offset = info->phys_lcr_base & (PAGE_SIZE-1); | |
8186 | info->phys_lcr_base &= ~(PAGE_SIZE-1); | |
8187 | ||
8188 | info->bus_type = MGSL_BUS_TYPE_PCI; | |
8189 | info->io_addr_size = 8; | |
8190 | info->irq_flags = SA_SHIRQ; | |
8191 | ||
8192 | if (dev->device == 0x0210) { | |
8193 | /* Version 1 PCI9030 based universal PCI adapter */ | |
8194 | info->misc_ctrl_value = 0x007c4080; | |
8195 | info->hw_version = 1; | |
8196 | } else { | |
8197 | /* Version 0 PCI9050 based 5V PCI adapter | |
8198 | * A PCI9050 bug prevents reading LCR registers if | |
8199 | * LCR base address bit 7 is set. Maintain shadow | |
8200 | * value so we can write to LCR misc control reg. | |
8201 | */ | |
8202 | info->misc_ctrl_value = 0x087e4546; | |
8203 | info->hw_version = 0; | |
8204 | } | |
8205 | ||
8206 | mgsl_add_device(info); | |
8207 | ||
8208 | return 0; | |
8209 | } | |
8210 | ||
8211 | static void __devexit synclink_remove_one (struct pci_dev *dev) | |
8212 | { | |
8213 | } | |
8214 |