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1da177e4 LT |
1 | /* |
2 | * drivers/char/vme_scc.c: MVME147, MVME162, BVME6000 SCC serial ports | |
3 | * implementation. | |
4 | * Copyright 1999 Richard Hirst <richard@sleepie.demon.co.uk> | |
5 | * | |
6 | * Based on atari_SCC.c which was | |
7 | * Copyright 1994-95 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de> | |
8 | * Partially based on PC-Linux serial.c by Linus Torvalds and Theodore Ts'o | |
9 | * | |
10 | * This file is subject to the terms and conditions of the GNU General Public | |
11 | * License. See the file COPYING in the main directory of this archive | |
12 | * for more details. | |
13 | * | |
14 | */ | |
15 | ||
16 | #include <linux/module.h> | |
17 | #include <linux/config.h> | |
18 | #include <linux/kdev_t.h> | |
19 | #include <asm/io.h> | |
20 | #include <linux/kernel.h> | |
21 | #include <linux/sched.h> | |
22 | #include <linux/ioport.h> | |
23 | #include <linux/interrupt.h> | |
24 | #include <linux/errno.h> | |
25 | #include <linux/tty.h> | |
26 | #include <linux/tty_flip.h> | |
27 | #include <linux/mm.h> | |
28 | #include <linux/serial.h> | |
29 | #include <linux/fcntl.h> | |
30 | #include <linux/major.h> | |
31 | #include <linux/delay.h> | |
32 | #include <linux/slab.h> | |
33 | #include <linux/miscdevice.h> | |
34 | #include <linux/console.h> | |
35 | #include <linux/init.h> | |
36 | #include <asm/setup.h> | |
37 | #include <asm/bootinfo.h> | |
38 | ||
39 | #ifdef CONFIG_MVME147_SCC | |
40 | #include <asm/mvme147hw.h> | |
41 | #endif | |
42 | #ifdef CONFIG_MVME162_SCC | |
43 | #include <asm/mvme16xhw.h> | |
44 | #endif | |
45 | #ifdef CONFIG_BVME6000_SCC | |
46 | #include <asm/bvme6000hw.h> | |
47 | #endif | |
48 | ||
49 | #include <linux/generic_serial.h> | |
50 | #include "scc.h" | |
51 | ||
52 | ||
53 | #define CHANNEL_A 0 | |
54 | #define CHANNEL_B 1 | |
55 | ||
56 | #define SCC_MINOR_BASE 64 | |
57 | ||
58 | /* Shadows for all SCC write registers */ | |
59 | static unsigned char scc_shadow[2][16]; | |
60 | ||
61 | /* Location to access for SCC register access delay */ | |
62 | static volatile unsigned char *scc_del = NULL; | |
63 | ||
64 | /* To keep track of STATUS_REG state for detection of Ext/Status int source */ | |
65 | static unsigned char scc_last_status_reg[2]; | |
66 | ||
67 | /***************************** Prototypes *****************************/ | |
68 | ||
69 | /* Function prototypes */ | |
70 | static void scc_disable_tx_interrupts(void * ptr); | |
71 | static void scc_enable_tx_interrupts(void * ptr); | |
72 | static void scc_disable_rx_interrupts(void * ptr); | |
73 | static void scc_enable_rx_interrupts(void * ptr); | |
74 | static int scc_get_CD(void * ptr); | |
75 | static void scc_shutdown_port(void * ptr); | |
76 | static int scc_set_real_termios(void *ptr); | |
77 | static void scc_hungup(void *ptr); | |
78 | static void scc_close(void *ptr); | |
79 | static int scc_chars_in_buffer(void * ptr); | |
80 | static int scc_open(struct tty_struct * tty, struct file * filp); | |
81 | static int scc_ioctl(struct tty_struct * tty, struct file * filp, | |
82 | unsigned int cmd, unsigned long arg); | |
83 | static void scc_throttle(struct tty_struct *tty); | |
84 | static void scc_unthrottle(struct tty_struct *tty); | |
85 | static irqreturn_t scc_tx_int(int irq, void *data, struct pt_regs *fp); | |
86 | static irqreturn_t scc_rx_int(int irq, void *data, struct pt_regs *fp); | |
87 | static irqreturn_t scc_stat_int(int irq, void *data, struct pt_regs *fp); | |
88 | static irqreturn_t scc_spcond_int(int irq, void *data, struct pt_regs *fp); | |
89 | static void scc_setsignals(struct scc_port *port, int dtr, int rts); | |
90 | static void scc_break_ctl(struct tty_struct *tty, int break_state); | |
91 | ||
92 | static struct tty_driver *scc_driver; | |
93 | ||
94 | struct scc_port scc_ports[2]; | |
95 | ||
96 | int scc_initialized = 0; | |
97 | ||
98 | /*--------------------------------------------------------------------------- | |
99 | * Interface from generic_serial.c back here | |
100 | *--------------------------------------------------------------------------*/ | |
101 | ||
102 | static struct real_driver scc_real_driver = { | |
103 | scc_disable_tx_interrupts, | |
104 | scc_enable_tx_interrupts, | |
105 | scc_disable_rx_interrupts, | |
106 | scc_enable_rx_interrupts, | |
107 | scc_get_CD, | |
108 | scc_shutdown_port, | |
109 | scc_set_real_termios, | |
110 | scc_chars_in_buffer, | |
111 | scc_close, | |
112 | scc_hungup, | |
113 | NULL | |
114 | }; | |
115 | ||
116 | ||
117 | static struct tty_operations scc_ops = { | |
118 | .open = scc_open, | |
119 | .close = gs_close, | |
120 | .write = gs_write, | |
121 | .put_char = gs_put_char, | |
122 | .flush_chars = gs_flush_chars, | |
123 | .write_room = gs_write_room, | |
124 | .chars_in_buffer = gs_chars_in_buffer, | |
125 | .flush_buffer = gs_flush_buffer, | |
126 | .ioctl = scc_ioctl, | |
127 | .throttle = scc_throttle, | |
128 | .unthrottle = scc_unthrottle, | |
129 | .set_termios = gs_set_termios, | |
130 | .stop = gs_stop, | |
131 | .start = gs_start, | |
132 | .hangup = gs_hangup, | |
133 | .break_ctl = scc_break_ctl, | |
134 | }; | |
135 | ||
136 | /*---------------------------------------------------------------------------- | |
137 | * vme_scc_init() and support functions | |
138 | *---------------------------------------------------------------------------*/ | |
139 | ||
140 | static int scc_init_drivers(void) | |
141 | { | |
142 | int error; | |
143 | ||
144 | scc_driver = alloc_tty_driver(2); | |
145 | if (!scc_driver) | |
146 | return -ENOMEM; | |
147 | scc_driver->owner = THIS_MODULE; | |
148 | scc_driver->driver_name = "scc"; | |
149 | scc_driver->name = "ttyS"; | |
150 | scc_driver->devfs_name = "tts/"; | |
151 | scc_driver->major = TTY_MAJOR; | |
152 | scc_driver->minor_start = SCC_MINOR_BASE; | |
153 | scc_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
154 | scc_driver->subtype = SERIAL_TYPE_NORMAL; | |
155 | scc_driver->init_termios = tty_std_termios; | |
156 | scc_driver->init_termios.c_cflag = | |
157 | B9600 | CS8 | CREAD | HUPCL | CLOCAL; | |
158 | scc_driver->flags = TTY_DRIVER_REAL_RAW; | |
159 | tty_set_operations(scc_driver, &scc_ops); | |
160 | ||
161 | if ((error = tty_register_driver(scc_driver))) { | |
162 | printk(KERN_ERR "scc: Couldn't register scc driver, error = %d\n", | |
163 | error); | |
164 | put_tty_driver(scc_driver); | |
165 | return 1; | |
166 | } | |
167 | ||
168 | return 0; | |
169 | } | |
170 | ||
171 | ||
172 | /* ports[] array is indexed by line no (i.e. [0] for ttyS0, [1] for ttyS1). | |
173 | */ | |
174 | ||
175 | static void scc_init_portstructs(void) | |
176 | { | |
177 | struct scc_port *port; | |
178 | int i; | |
179 | ||
180 | for (i = 0; i < 2; i++) { | |
181 | port = scc_ports + i; | |
182 | port->gs.magic = SCC_MAGIC; | |
183 | port->gs.close_delay = HZ/2; | |
184 | port->gs.closing_wait = 30 * HZ; | |
185 | port->gs.rd = &scc_real_driver; | |
186 | #ifdef NEW_WRITE_LOCKING | |
187 | port->gs.port_write_sem = MUTEX; | |
188 | #endif | |
189 | init_waitqueue_head(&port->gs.open_wait); | |
190 | init_waitqueue_head(&port->gs.close_wait); | |
191 | } | |
192 | } | |
193 | ||
194 | ||
195 | #ifdef CONFIG_MVME147_SCC | |
196 | static int mvme147_scc_init(void) | |
197 | { | |
198 | struct scc_port *port; | |
199 | ||
200 | printk(KERN_INFO "SCC: MVME147 Serial Driver\n"); | |
201 | /* Init channel A */ | |
202 | port = &scc_ports[0]; | |
203 | port->channel = CHANNEL_A; | |
204 | port->ctrlp = (volatile unsigned char *)M147_SCC_A_ADDR; | |
205 | port->datap = port->ctrlp + 1; | |
206 | port->port_a = &scc_ports[0]; | |
207 | port->port_b = &scc_ports[1]; | |
208 | request_irq(MVME147_IRQ_SCCA_TX, scc_tx_int, SA_INTERRUPT, | |
209 | "SCC-A TX", port); | |
210 | request_irq(MVME147_IRQ_SCCA_STAT, scc_stat_int, SA_INTERRUPT, | |
211 | "SCC-A status", port); | |
212 | request_irq(MVME147_IRQ_SCCA_RX, scc_rx_int, SA_INTERRUPT, | |
213 | "SCC-A RX", port); | |
214 | request_irq(MVME147_IRQ_SCCA_SPCOND, scc_spcond_int, SA_INTERRUPT, | |
215 | "SCC-A special cond", port); | |
216 | { | |
217 | SCC_ACCESS_INIT(port); | |
218 | ||
219 | /* disable interrupts for this channel */ | |
220 | SCCwrite(INT_AND_DMA_REG, 0); | |
221 | /* Set the interrupt vector */ | |
222 | SCCwrite(INT_VECTOR_REG, MVME147_IRQ_SCC_BASE); | |
223 | /* Interrupt parameters: vector includes status, status low */ | |
224 | SCCwrite(MASTER_INT_CTRL, MIC_VEC_INCL_STAT); | |
225 | SCCmod(MASTER_INT_CTRL, 0xff, MIC_MASTER_INT_ENAB); | |
226 | } | |
227 | ||
228 | /* Init channel B */ | |
229 | port = &scc_ports[1]; | |
230 | port->channel = CHANNEL_B; | |
231 | port->ctrlp = (volatile unsigned char *)M147_SCC_B_ADDR; | |
232 | port->datap = port->ctrlp + 1; | |
233 | port->port_a = &scc_ports[0]; | |
234 | port->port_b = &scc_ports[1]; | |
235 | request_irq(MVME147_IRQ_SCCB_TX, scc_tx_int, SA_INTERRUPT, | |
236 | "SCC-B TX", port); | |
237 | request_irq(MVME147_IRQ_SCCB_STAT, scc_stat_int, SA_INTERRUPT, | |
238 | "SCC-B status", port); | |
239 | request_irq(MVME147_IRQ_SCCB_RX, scc_rx_int, SA_INTERRUPT, | |
240 | "SCC-B RX", port); | |
241 | request_irq(MVME147_IRQ_SCCB_SPCOND, scc_spcond_int, SA_INTERRUPT, | |
242 | "SCC-B special cond", port); | |
243 | { | |
244 | SCC_ACCESS_INIT(port); | |
245 | ||
246 | /* disable interrupts for this channel */ | |
247 | SCCwrite(INT_AND_DMA_REG, 0); | |
248 | } | |
249 | ||
250 | /* Ensure interrupts are enabled in the PCC chip */ | |
251 | m147_pcc->serial_cntrl=PCC_LEVEL_SERIAL|PCC_INT_ENAB; | |
252 | ||
253 | /* Initialise the tty driver structures and register */ | |
254 | scc_init_portstructs(); | |
255 | scc_init_drivers(); | |
256 | ||
257 | return 0; | |
258 | } | |
259 | #endif | |
260 | ||
261 | ||
262 | #ifdef CONFIG_MVME162_SCC | |
263 | static int mvme162_scc_init(void) | |
264 | { | |
265 | struct scc_port *port; | |
266 | ||
267 | if (!(mvme16x_config & MVME16x_CONFIG_GOT_SCCA)) | |
268 | return (-ENODEV); | |
269 | ||
270 | printk(KERN_INFO "SCC: MVME162 Serial Driver\n"); | |
271 | /* Init channel A */ | |
272 | port = &scc_ports[0]; | |
273 | port->channel = CHANNEL_A; | |
274 | port->ctrlp = (volatile unsigned char *)MVME_SCC_A_ADDR; | |
275 | port->datap = port->ctrlp + 2; | |
276 | port->port_a = &scc_ports[0]; | |
277 | port->port_b = &scc_ports[1]; | |
278 | request_irq(MVME162_IRQ_SCCA_TX, scc_tx_int, SA_INTERRUPT, | |
279 | "SCC-A TX", port); | |
280 | request_irq(MVME162_IRQ_SCCA_STAT, scc_stat_int, SA_INTERRUPT, | |
281 | "SCC-A status", port); | |
282 | request_irq(MVME162_IRQ_SCCA_RX, scc_rx_int, SA_INTERRUPT, | |
283 | "SCC-A RX", port); | |
284 | request_irq(MVME162_IRQ_SCCA_SPCOND, scc_spcond_int, SA_INTERRUPT, | |
285 | "SCC-A special cond", port); | |
286 | { | |
287 | SCC_ACCESS_INIT(port); | |
288 | ||
289 | /* disable interrupts for this channel */ | |
290 | SCCwrite(INT_AND_DMA_REG, 0); | |
291 | /* Set the interrupt vector */ | |
292 | SCCwrite(INT_VECTOR_REG, MVME162_IRQ_SCC_BASE); | |
293 | /* Interrupt parameters: vector includes status, status low */ | |
294 | SCCwrite(MASTER_INT_CTRL, MIC_VEC_INCL_STAT); | |
295 | SCCmod(MASTER_INT_CTRL, 0xff, MIC_MASTER_INT_ENAB); | |
296 | } | |
297 | ||
298 | /* Init channel B */ | |
299 | port = &scc_ports[1]; | |
300 | port->channel = CHANNEL_B; | |
301 | port->ctrlp = (volatile unsigned char *)MVME_SCC_B_ADDR; | |
302 | port->datap = port->ctrlp + 2; | |
303 | port->port_a = &scc_ports[0]; | |
304 | port->port_b = &scc_ports[1]; | |
305 | request_irq(MVME162_IRQ_SCCB_TX, scc_tx_int, SA_INTERRUPT, | |
306 | "SCC-B TX", port); | |
307 | request_irq(MVME162_IRQ_SCCB_STAT, scc_stat_int, SA_INTERRUPT, | |
308 | "SCC-B status", port); | |
309 | request_irq(MVME162_IRQ_SCCB_RX, scc_rx_int, SA_INTERRUPT, | |
310 | "SCC-B RX", port); | |
311 | request_irq(MVME162_IRQ_SCCB_SPCOND, scc_spcond_int, SA_INTERRUPT, | |
312 | "SCC-B special cond", port); | |
313 | ||
314 | { | |
315 | SCC_ACCESS_INIT(port); /* Either channel will do */ | |
316 | ||
317 | /* disable interrupts for this channel */ | |
318 | SCCwrite(INT_AND_DMA_REG, 0); | |
319 | } | |
320 | ||
321 | /* Ensure interrupts are enabled in the MC2 chip */ | |
322 | *(volatile char *)0xfff4201d = 0x14; | |
323 | ||
324 | /* Initialise the tty driver structures and register */ | |
325 | scc_init_portstructs(); | |
326 | scc_init_drivers(); | |
327 | ||
328 | return 0; | |
329 | } | |
330 | #endif | |
331 | ||
332 | ||
333 | #ifdef CONFIG_BVME6000_SCC | |
334 | static int bvme6000_scc_init(void) | |
335 | { | |
336 | struct scc_port *port; | |
337 | ||
338 | printk(KERN_INFO "SCC: BVME6000 Serial Driver\n"); | |
339 | /* Init channel A */ | |
340 | port = &scc_ports[0]; | |
341 | port->channel = CHANNEL_A; | |
342 | port->ctrlp = (volatile unsigned char *)BVME_SCC_A_ADDR; | |
343 | port->datap = port->ctrlp + 4; | |
344 | port->port_a = &scc_ports[0]; | |
345 | port->port_b = &scc_ports[1]; | |
346 | request_irq(BVME_IRQ_SCCA_TX, scc_tx_int, SA_INTERRUPT, | |
347 | "SCC-A TX", port); | |
348 | request_irq(BVME_IRQ_SCCA_STAT, scc_stat_int, SA_INTERRUPT, | |
349 | "SCC-A status", port); | |
350 | request_irq(BVME_IRQ_SCCA_RX, scc_rx_int, SA_INTERRUPT, | |
351 | "SCC-A RX", port); | |
352 | request_irq(BVME_IRQ_SCCA_SPCOND, scc_spcond_int, SA_INTERRUPT, | |
353 | "SCC-A special cond", port); | |
354 | { | |
355 | SCC_ACCESS_INIT(port); | |
356 | ||
357 | /* disable interrupts for this channel */ | |
358 | SCCwrite(INT_AND_DMA_REG, 0); | |
359 | /* Set the interrupt vector */ | |
360 | SCCwrite(INT_VECTOR_REG, BVME_IRQ_SCC_BASE); | |
361 | /* Interrupt parameters: vector includes status, status low */ | |
362 | SCCwrite(MASTER_INT_CTRL, MIC_VEC_INCL_STAT); | |
363 | SCCmod(MASTER_INT_CTRL, 0xff, MIC_MASTER_INT_ENAB); | |
364 | } | |
365 | ||
366 | /* Init channel B */ | |
367 | port = &scc_ports[1]; | |
368 | port->channel = CHANNEL_B; | |
369 | port->ctrlp = (volatile unsigned char *)BVME_SCC_B_ADDR; | |
370 | port->datap = port->ctrlp + 4; | |
371 | port->port_a = &scc_ports[0]; | |
372 | port->port_b = &scc_ports[1]; | |
373 | request_irq(BVME_IRQ_SCCB_TX, scc_tx_int, SA_INTERRUPT, | |
374 | "SCC-B TX", port); | |
375 | request_irq(BVME_IRQ_SCCB_STAT, scc_stat_int, SA_INTERRUPT, | |
376 | "SCC-B status", port); | |
377 | request_irq(BVME_IRQ_SCCB_RX, scc_rx_int, SA_INTERRUPT, | |
378 | "SCC-B RX", port); | |
379 | request_irq(BVME_IRQ_SCCB_SPCOND, scc_spcond_int, SA_INTERRUPT, | |
380 | "SCC-B special cond", port); | |
381 | ||
382 | { | |
383 | SCC_ACCESS_INIT(port); /* Either channel will do */ | |
384 | ||
385 | /* disable interrupts for this channel */ | |
386 | SCCwrite(INT_AND_DMA_REG, 0); | |
387 | } | |
388 | ||
389 | /* Initialise the tty driver structures and register */ | |
390 | scc_init_portstructs(); | |
391 | scc_init_drivers(); | |
392 | ||
393 | return 0; | |
394 | } | |
395 | #endif | |
396 | ||
397 | ||
398 | static int vme_scc_init(void) | |
399 | { | |
400 | int res = -ENODEV; | |
401 | ||
402 | #ifdef CONFIG_MVME147_SCC | |
403 | if (MACH_IS_MVME147) | |
404 | res = mvme147_scc_init(); | |
405 | #endif | |
406 | #ifdef CONFIG_MVME162_SCC | |
407 | if (MACH_IS_MVME16x) | |
408 | res = mvme162_scc_init(); | |
409 | #endif | |
410 | #ifdef CONFIG_BVME6000_SCC | |
411 | if (MACH_IS_BVME6000) | |
412 | res = bvme6000_scc_init(); | |
413 | #endif | |
414 | return res; | |
415 | } | |
416 | ||
417 | module_init(vme_scc_init); | |
418 | ||
419 | ||
420 | /*--------------------------------------------------------------------------- | |
421 | * Interrupt handlers | |
422 | *--------------------------------------------------------------------------*/ | |
423 | ||
424 | static irqreturn_t scc_rx_int(int irq, void *data, struct pt_regs *fp) | |
425 | { | |
426 | unsigned char ch; | |
427 | struct scc_port *port = data; | |
428 | struct tty_struct *tty = port->gs.tty; | |
429 | SCC_ACCESS_INIT(port); | |
430 | ||
431 | ch = SCCread_NB(RX_DATA_REG); | |
432 | if (!tty) { | |
433 | printk(KERN_WARNING "scc_rx_int with NULL tty!\n"); | |
434 | SCCwrite_NB(COMMAND_REG, CR_HIGHEST_IUS_RESET); | |
435 | return IRQ_HANDLED; | |
436 | } | |
437 | if (tty->flip.count < TTY_FLIPBUF_SIZE) { | |
438 | *tty->flip.char_buf_ptr = ch; | |
439 | *tty->flip.flag_buf_ptr = 0; | |
440 | tty->flip.flag_buf_ptr++; | |
441 | tty->flip.char_buf_ptr++; | |
442 | tty->flip.count++; | |
443 | } | |
444 | ||
445 | /* Check if another character is already ready; in that case, the | |
446 | * spcond_int() function must be used, because this character may have an | |
447 | * error condition that isn't signalled by the interrupt vector used! | |
448 | */ | |
449 | if (SCCread(INT_PENDING_REG) & | |
450 | (port->channel == CHANNEL_A ? IPR_A_RX : IPR_B_RX)) { | |
451 | scc_spcond_int (irq, data, fp); | |
452 | return IRQ_HANDLED; | |
453 | } | |
454 | ||
455 | SCCwrite_NB(COMMAND_REG, CR_HIGHEST_IUS_RESET); | |
456 | ||
457 | tty_flip_buffer_push(tty); | |
458 | return IRQ_HANDLED; | |
459 | } | |
460 | ||
461 | ||
462 | static irqreturn_t scc_spcond_int(int irq, void *data, struct pt_regs *fp) | |
463 | { | |
464 | struct scc_port *port = data; | |
465 | struct tty_struct *tty = port->gs.tty; | |
466 | unsigned char stat, ch, err; | |
467 | int int_pending_mask = port->channel == CHANNEL_A ? | |
468 | IPR_A_RX : IPR_B_RX; | |
469 | SCC_ACCESS_INIT(port); | |
470 | ||
471 | if (!tty) { | |
472 | printk(KERN_WARNING "scc_spcond_int with NULL tty!\n"); | |
473 | SCCwrite(COMMAND_REG, CR_ERROR_RESET); | |
474 | SCCwrite_NB(COMMAND_REG, CR_HIGHEST_IUS_RESET); | |
475 | return IRQ_HANDLED; | |
476 | } | |
477 | do { | |
478 | stat = SCCread(SPCOND_STATUS_REG); | |
479 | ch = SCCread_NB(RX_DATA_REG); | |
480 | ||
481 | if (stat & SCSR_RX_OVERRUN) | |
482 | err = TTY_OVERRUN; | |
483 | else if (stat & SCSR_PARITY_ERR) | |
484 | err = TTY_PARITY; | |
485 | else if (stat & SCSR_CRC_FRAME_ERR) | |
486 | err = TTY_FRAME; | |
487 | else | |
488 | err = 0; | |
489 | ||
490 | if (tty->flip.count < TTY_FLIPBUF_SIZE) { | |
491 | *tty->flip.char_buf_ptr = ch; | |
492 | *tty->flip.flag_buf_ptr = err; | |
493 | tty->flip.flag_buf_ptr++; | |
494 | tty->flip.char_buf_ptr++; | |
495 | tty->flip.count++; | |
496 | } | |
497 | ||
498 | /* ++TeSche: *All* errors have to be cleared manually, | |
499 | * else the condition persists for the next chars | |
500 | */ | |
501 | if (err) | |
502 | SCCwrite(COMMAND_REG, CR_ERROR_RESET); | |
503 | ||
504 | } while(SCCread(INT_PENDING_REG) & int_pending_mask); | |
505 | ||
506 | SCCwrite_NB(COMMAND_REG, CR_HIGHEST_IUS_RESET); | |
507 | ||
508 | tty_flip_buffer_push(tty); | |
509 | return IRQ_HANDLED; | |
510 | } | |
511 | ||
512 | ||
513 | static irqreturn_t scc_tx_int(int irq, void *data, struct pt_regs *fp) | |
514 | { | |
515 | struct scc_port *port = data; | |
516 | SCC_ACCESS_INIT(port); | |
517 | ||
518 | if (!port->gs.tty) { | |
519 | printk(KERN_WARNING "scc_tx_int with NULL tty!\n"); | |
520 | SCCmod (INT_AND_DMA_REG, ~IDR_TX_INT_ENAB, 0); | |
521 | SCCwrite(COMMAND_REG, CR_TX_PENDING_RESET); | |
522 | SCCwrite_NB(COMMAND_REG, CR_HIGHEST_IUS_RESET); | |
523 | return IRQ_HANDLED; | |
524 | } | |
525 | while ((SCCread_NB(STATUS_REG) & SR_TX_BUF_EMPTY)) { | |
526 | if (port->x_char) { | |
527 | SCCwrite(TX_DATA_REG, port->x_char); | |
528 | port->x_char = 0; | |
529 | } | |
530 | else if ((port->gs.xmit_cnt <= 0) || port->gs.tty->stopped || | |
531 | port->gs.tty->hw_stopped) | |
532 | break; | |
533 | else { | |
534 | SCCwrite(TX_DATA_REG, port->gs.xmit_buf[port->gs.xmit_tail++]); | |
535 | port->gs.xmit_tail = port->gs.xmit_tail & (SERIAL_XMIT_SIZE-1); | |
536 | if (--port->gs.xmit_cnt <= 0) | |
537 | break; | |
538 | } | |
539 | } | |
540 | if ((port->gs.xmit_cnt <= 0) || port->gs.tty->stopped || | |
541 | port->gs.tty->hw_stopped) { | |
542 | /* disable tx interrupts */ | |
543 | SCCmod (INT_AND_DMA_REG, ~IDR_TX_INT_ENAB, 0); | |
544 | SCCwrite(COMMAND_REG, CR_TX_PENDING_RESET); /* disable tx_int on next tx underrun? */ | |
545 | port->gs.flags &= ~GS_TX_INTEN; | |
546 | } | |
547 | if (port->gs.tty && port->gs.xmit_cnt <= port->gs.wakeup_chars) | |
548 | tty_wakeup(port->gs.tty); | |
549 | ||
550 | SCCwrite_NB(COMMAND_REG, CR_HIGHEST_IUS_RESET); | |
551 | return IRQ_HANDLED; | |
552 | } | |
553 | ||
554 | ||
555 | static irqreturn_t scc_stat_int(int irq, void *data, struct pt_regs *fp) | |
556 | { | |
557 | struct scc_port *port = data; | |
558 | unsigned channel = port->channel; | |
559 | unsigned char last_sr, sr, changed; | |
560 | SCC_ACCESS_INIT(port); | |
561 | ||
562 | last_sr = scc_last_status_reg[channel]; | |
563 | sr = scc_last_status_reg[channel] = SCCread_NB(STATUS_REG); | |
564 | changed = last_sr ^ sr; | |
565 | ||
566 | if (changed & SR_DCD) { | |
567 | port->c_dcd = !!(sr & SR_DCD); | |
568 | if (!(port->gs.flags & ASYNC_CHECK_CD)) | |
569 | ; /* Don't report DCD changes */ | |
570 | else if (port->c_dcd) { | |
571 | wake_up_interruptible(&port->gs.open_wait); | |
572 | } | |
573 | else { | |
574 | if (port->gs.tty) | |
575 | tty_hangup (port->gs.tty); | |
576 | } | |
577 | } | |
578 | SCCwrite(COMMAND_REG, CR_EXTSTAT_RESET); | |
579 | SCCwrite_NB(COMMAND_REG, CR_HIGHEST_IUS_RESET); | |
580 | return IRQ_HANDLED; | |
581 | } | |
582 | ||
583 | ||
584 | /*--------------------------------------------------------------------------- | |
585 | * generic_serial.c callback funtions | |
586 | *--------------------------------------------------------------------------*/ | |
587 | ||
588 | static void scc_disable_tx_interrupts(void *ptr) | |
589 | { | |
590 | struct scc_port *port = ptr; | |
591 | unsigned long flags; | |
592 | SCC_ACCESS_INIT(port); | |
593 | ||
594 | local_irq_save(flags); | |
595 | SCCmod(INT_AND_DMA_REG, ~IDR_TX_INT_ENAB, 0); | |
596 | port->gs.flags &= ~GS_TX_INTEN; | |
597 | local_irq_restore(flags); | |
598 | } | |
599 | ||
600 | ||
601 | static void scc_enable_tx_interrupts(void *ptr) | |
602 | { | |
603 | struct scc_port *port = ptr; | |
604 | unsigned long flags; | |
605 | SCC_ACCESS_INIT(port); | |
606 | ||
607 | local_irq_save(flags); | |
608 | SCCmod(INT_AND_DMA_REG, 0xff, IDR_TX_INT_ENAB); | |
609 | /* restart the transmitter */ | |
610 | scc_tx_int (0, port, 0); | |
611 | local_irq_restore(flags); | |
612 | } | |
613 | ||
614 | ||
615 | static void scc_disable_rx_interrupts(void *ptr) | |
616 | { | |
617 | struct scc_port *port = ptr; | |
618 | unsigned long flags; | |
619 | SCC_ACCESS_INIT(port); | |
620 | ||
621 | local_irq_save(flags); | |
622 | SCCmod(INT_AND_DMA_REG, | |
623 | ~(IDR_RX_INT_MASK|IDR_PARERR_AS_SPCOND|IDR_EXTSTAT_INT_ENAB), 0); | |
624 | local_irq_restore(flags); | |
625 | } | |
626 | ||
627 | ||
628 | static void scc_enable_rx_interrupts(void *ptr) | |
629 | { | |
630 | struct scc_port *port = ptr; | |
631 | unsigned long flags; | |
632 | SCC_ACCESS_INIT(port); | |
633 | ||
634 | local_irq_save(flags); | |
635 | SCCmod(INT_AND_DMA_REG, 0xff, | |
636 | IDR_EXTSTAT_INT_ENAB|IDR_PARERR_AS_SPCOND|IDR_RX_INT_ALL); | |
637 | local_irq_restore(flags); | |
638 | } | |
639 | ||
640 | ||
641 | static int scc_get_CD(void *ptr) | |
642 | { | |
643 | struct scc_port *port = ptr; | |
644 | unsigned channel = port->channel; | |
645 | ||
646 | return !!(scc_last_status_reg[channel] & SR_DCD); | |
647 | } | |
648 | ||
649 | ||
650 | static void scc_shutdown_port(void *ptr) | |
651 | { | |
652 | struct scc_port *port = ptr; | |
653 | ||
654 | port->gs.flags &= ~ GS_ACTIVE; | |
655 | if (port->gs.tty && port->gs.tty->termios->c_cflag & HUPCL) { | |
656 | scc_setsignals (port, 0, 0); | |
657 | } | |
658 | } | |
659 | ||
660 | ||
661 | static int scc_set_real_termios (void *ptr) | |
662 | { | |
663 | /* the SCC has char sizes 5,7,6,8 in that order! */ | |
664 | static int chsize_map[4] = { 0, 2, 1, 3 }; | |
665 | unsigned cflag, baud, chsize, channel, brgval = 0; | |
666 | unsigned long flags; | |
667 | struct scc_port *port = ptr; | |
668 | SCC_ACCESS_INIT(port); | |
669 | ||
670 | if (!port->gs.tty || !port->gs.tty->termios) return 0; | |
671 | ||
672 | channel = port->channel; | |
673 | ||
674 | if (channel == CHANNEL_A) | |
675 | return 0; /* Settings controlled by boot PROM */ | |
676 | ||
677 | cflag = port->gs.tty->termios->c_cflag; | |
678 | baud = port->gs.baud; | |
679 | chsize = (cflag & CSIZE) >> 4; | |
680 | ||
681 | if (baud == 0) { | |
682 | /* speed == 0 -> drop DTR */ | |
683 | local_irq_save(flags); | |
684 | SCCmod(TX_CTRL_REG, ~TCR_DTR, 0); | |
685 | local_irq_restore(flags); | |
686 | return 0; | |
687 | } | |
688 | else if ((MACH_IS_MVME16x && (baud < 50 || baud > 38400)) || | |
689 | (MACH_IS_MVME147 && (baud < 50 || baud > 19200)) || | |
690 | (MACH_IS_BVME6000 &&(baud < 50 || baud > 76800))) { | |
691 | printk(KERN_NOTICE "SCC: Bad speed requested, %d\n", baud); | |
692 | return 0; | |
693 | } | |
694 | ||
695 | if (cflag & CLOCAL) | |
696 | port->gs.flags &= ~ASYNC_CHECK_CD; | |
697 | else | |
698 | port->gs.flags |= ASYNC_CHECK_CD; | |
699 | ||
700 | #ifdef CONFIG_MVME147_SCC | |
701 | if (MACH_IS_MVME147) | |
702 | brgval = (M147_SCC_PCLK + baud/2) / (16 * 2 * baud) - 2; | |
703 | #endif | |
704 | #ifdef CONFIG_MVME162_SCC | |
705 | if (MACH_IS_MVME16x) | |
706 | brgval = (MVME_SCC_PCLK + baud/2) / (16 * 2 * baud) - 2; | |
707 | #endif | |
708 | #ifdef CONFIG_BVME6000_SCC | |
709 | if (MACH_IS_BVME6000) | |
710 | brgval = (BVME_SCC_RTxC + baud/2) / (16 * 2 * baud) - 2; | |
711 | #endif | |
712 | /* Now we have all parameters and can go to set them: */ | |
713 | local_irq_save(flags); | |
714 | ||
715 | /* receiver's character size and auto-enables */ | |
716 | SCCmod(RX_CTRL_REG, ~(RCR_CHSIZE_MASK|RCR_AUTO_ENAB_MODE), | |
717 | (chsize_map[chsize] << 6) | | |
718 | ((cflag & CRTSCTS) ? RCR_AUTO_ENAB_MODE : 0)); | |
719 | /* parity and stop bits (both, Tx and Rx), clock mode never changes */ | |
720 | SCCmod (AUX1_CTRL_REG, | |
721 | ~(A1CR_PARITY_MASK | A1CR_MODE_MASK), | |
722 | ((cflag & PARENB | |
723 | ? (cflag & PARODD ? A1CR_PARITY_ODD : A1CR_PARITY_EVEN) | |
724 | : A1CR_PARITY_NONE) | |
725 | | (cflag & CSTOPB ? A1CR_MODE_ASYNC_2 : A1CR_MODE_ASYNC_1))); | |
726 | /* sender's character size, set DTR for valid baud rate */ | |
727 | SCCmod(TX_CTRL_REG, ~TCR_CHSIZE_MASK, chsize_map[chsize] << 5 | TCR_DTR); | |
728 | /* clock sources never change */ | |
729 | /* disable BRG before changing the value */ | |
730 | SCCmod(DPLL_CTRL_REG, ~DCR_BRG_ENAB, 0); | |
731 | /* BRG value */ | |
732 | SCCwrite(TIMER_LOW_REG, brgval & 0xff); | |
733 | SCCwrite(TIMER_HIGH_REG, (brgval >> 8) & 0xff); | |
734 | /* BRG enable, and clock source never changes */ | |
735 | SCCmod(DPLL_CTRL_REG, 0xff, DCR_BRG_ENAB); | |
736 | ||
737 | local_irq_restore(flags); | |
738 | ||
739 | return 0; | |
740 | } | |
741 | ||
742 | ||
743 | static int scc_chars_in_buffer (void *ptr) | |
744 | { | |
745 | struct scc_port *port = ptr; | |
746 | SCC_ACCESS_INIT(port); | |
747 | ||
748 | return (SCCread (SPCOND_STATUS_REG) & SCSR_ALL_SENT) ? 0 : 1; | |
749 | } | |
750 | ||
751 | ||
752 | /* Comment taken from sx.c (2.4.0): | |
753 | I haven't the foggiest why the decrement use count has to happen | |
754 | here. The whole linux serial drivers stuff needs to be redesigned. | |
755 | My guess is that this is a hack to minimize the impact of a bug | |
756 | elsewhere. Thinking about it some more. (try it sometime) Try | |
757 | running minicom on a serial port that is driven by a modularized | |
758 | driver. Have the modem hangup. Then remove the driver module. Then | |
759 | exit minicom. I expect an "oops". -- REW */ | |
760 | ||
761 | static void scc_hungup(void *ptr) | |
762 | { | |
763 | scc_disable_tx_interrupts(ptr); | |
764 | scc_disable_rx_interrupts(ptr); | |
765 | } | |
766 | ||
767 | ||
768 | static void scc_close(void *ptr) | |
769 | { | |
770 | scc_disable_tx_interrupts(ptr); | |
771 | scc_disable_rx_interrupts(ptr); | |
772 | } | |
773 | ||
774 | ||
775 | /*--------------------------------------------------------------------------- | |
776 | * Internal support functions | |
777 | *--------------------------------------------------------------------------*/ | |
778 | ||
779 | static void scc_setsignals(struct scc_port *port, int dtr, int rts) | |
780 | { | |
781 | unsigned long flags; | |
782 | unsigned char t; | |
783 | SCC_ACCESS_INIT(port); | |
784 | ||
785 | local_irq_save(flags); | |
786 | t = SCCread(TX_CTRL_REG); | |
787 | if (dtr >= 0) t = dtr? (t | TCR_DTR): (t & ~TCR_DTR); | |
788 | if (rts >= 0) t = rts? (t | TCR_RTS): (t & ~TCR_RTS); | |
789 | SCCwrite(TX_CTRL_REG, t); | |
790 | local_irq_restore(flags); | |
791 | } | |
792 | ||
793 | ||
794 | static void scc_send_xchar(struct tty_struct *tty, char ch) | |
795 | { | |
796 | struct scc_port *port = (struct scc_port *)tty->driver_data; | |
797 | ||
798 | port->x_char = ch; | |
799 | if (ch) | |
800 | scc_enable_tx_interrupts(port); | |
801 | } | |
802 | ||
803 | ||
804 | /*--------------------------------------------------------------------------- | |
805 | * Driver entrypoints referenced from above | |
806 | *--------------------------------------------------------------------------*/ | |
807 | ||
808 | static int scc_open (struct tty_struct * tty, struct file * filp) | |
809 | { | |
810 | int line = tty->index; | |
811 | int retval; | |
812 | struct scc_port *port = &scc_ports[line]; | |
813 | int i, channel = port->channel; | |
814 | unsigned long flags; | |
815 | SCC_ACCESS_INIT(port); | |
816 | #if defined(CONFIG_MVME162_SCC) || defined(CONFIG_MVME147_SCC) | |
817 | static const struct { | |
818 | unsigned reg, val; | |
819 | } mvme_init_tab[] = { | |
820 | /* Values for MVME162 and MVME147 */ | |
821 | /* no parity, 1 stop bit, async, 1:16 */ | |
822 | { AUX1_CTRL_REG, A1CR_PARITY_NONE|A1CR_MODE_ASYNC_1|A1CR_CLKMODE_x16 }, | |
823 | /* parity error is special cond, ints disabled, no DMA */ | |
824 | { INT_AND_DMA_REG, IDR_PARERR_AS_SPCOND | IDR_RX_INT_DISAB }, | |
825 | /* Rx 8 bits/char, no auto enable, Rx off */ | |
826 | { RX_CTRL_REG, RCR_CHSIZE_8 }, | |
827 | /* DTR off, Tx 8 bits/char, RTS off, Tx off */ | |
828 | { TX_CTRL_REG, TCR_CHSIZE_8 }, | |
829 | /* special features off */ | |
830 | { AUX2_CTRL_REG, 0 }, | |
831 | { CLK_CTRL_REG, CCR_RXCLK_BRG | CCR_TXCLK_BRG }, | |
832 | { DPLL_CTRL_REG, DCR_BRG_ENAB | DCR_BRG_USE_PCLK }, | |
833 | /* Start Rx */ | |
834 | { RX_CTRL_REG, RCR_RX_ENAB | RCR_CHSIZE_8 }, | |
835 | /* Start Tx */ | |
836 | { TX_CTRL_REG, TCR_TX_ENAB | TCR_RTS | TCR_DTR | TCR_CHSIZE_8 }, | |
837 | /* Ext/Stat ints: DCD only */ | |
838 | { INT_CTRL_REG, ICR_ENAB_DCD_INT }, | |
839 | /* Reset Ext/Stat ints */ | |
840 | { COMMAND_REG, CR_EXTSTAT_RESET }, | |
841 | /* ...again */ | |
842 | { COMMAND_REG, CR_EXTSTAT_RESET }, | |
843 | }; | |
844 | #endif | |
845 | #if defined(CONFIG_BVME6000_SCC) | |
846 | static const struct { | |
847 | unsigned reg, val; | |
848 | } bvme_init_tab[] = { | |
849 | /* Values for BVME6000 */ | |
850 | /* no parity, 1 stop bit, async, 1:16 */ | |
851 | { AUX1_CTRL_REG, A1CR_PARITY_NONE|A1CR_MODE_ASYNC_1|A1CR_CLKMODE_x16 }, | |
852 | /* parity error is special cond, ints disabled, no DMA */ | |
853 | { INT_AND_DMA_REG, IDR_PARERR_AS_SPCOND | IDR_RX_INT_DISAB }, | |
854 | /* Rx 8 bits/char, no auto enable, Rx off */ | |
855 | { RX_CTRL_REG, RCR_CHSIZE_8 }, | |
856 | /* DTR off, Tx 8 bits/char, RTS off, Tx off */ | |
857 | { TX_CTRL_REG, TCR_CHSIZE_8 }, | |
858 | /* special features off */ | |
859 | { AUX2_CTRL_REG, 0 }, | |
860 | { CLK_CTRL_REG, CCR_RTxC_XTAL | CCR_RXCLK_BRG | CCR_TXCLK_BRG }, | |
861 | { DPLL_CTRL_REG, DCR_BRG_ENAB }, | |
862 | /* Start Rx */ | |
863 | { RX_CTRL_REG, RCR_RX_ENAB | RCR_CHSIZE_8 }, | |
864 | /* Start Tx */ | |
865 | { TX_CTRL_REG, TCR_TX_ENAB | TCR_RTS | TCR_DTR | TCR_CHSIZE_8 }, | |
866 | /* Ext/Stat ints: DCD only */ | |
867 | { INT_CTRL_REG, ICR_ENAB_DCD_INT }, | |
868 | /* Reset Ext/Stat ints */ | |
869 | { COMMAND_REG, CR_EXTSTAT_RESET }, | |
870 | /* ...again */ | |
871 | { COMMAND_REG, CR_EXTSTAT_RESET }, | |
872 | }; | |
873 | #endif | |
874 | if (!(port->gs.flags & ASYNC_INITIALIZED)) { | |
875 | local_irq_save(flags); | |
876 | #if defined(CONFIG_MVME147_SCC) || defined(CONFIG_MVME162_SCC) | |
877 | if (MACH_IS_MVME147 || MACH_IS_MVME16x) { | |
878 | for (i=0; i<sizeof(mvme_init_tab)/sizeof(*mvme_init_tab); ++i) | |
879 | SCCwrite(mvme_init_tab[i].reg, mvme_init_tab[i].val); | |
880 | } | |
881 | #endif | |
882 | #if defined(CONFIG_BVME6000_SCC) | |
883 | if (MACH_IS_BVME6000) { | |
884 | for (i=0; i<sizeof(bvme_init_tab)/sizeof(*bvme_init_tab); ++i) | |
885 | SCCwrite(bvme_init_tab[i].reg, bvme_init_tab[i].val); | |
886 | } | |
887 | #endif | |
888 | ||
889 | /* remember status register for detection of DCD and CTS changes */ | |
890 | scc_last_status_reg[channel] = SCCread(STATUS_REG); | |
891 | ||
892 | port->c_dcd = 0; /* Prevent initial 1->0 interrupt */ | |
893 | scc_setsignals (port, 1,1); | |
894 | local_irq_restore(flags); | |
895 | } | |
896 | ||
897 | tty->driver_data = port; | |
898 | port->gs.tty = tty; | |
899 | port->gs.count++; | |
900 | retval = gs_init_port(&port->gs); | |
901 | if (retval) { | |
902 | port->gs.count--; | |
903 | return retval; | |
904 | } | |
905 | port->gs.flags |= GS_ACTIVE; | |
906 | retval = gs_block_til_ready(port, filp); | |
907 | ||
908 | if (retval) { | |
909 | port->gs.count--; | |
910 | return retval; | |
911 | } | |
912 | ||
913 | port->c_dcd = scc_get_CD (port); | |
914 | ||
915 | scc_enable_rx_interrupts(port); | |
916 | ||
917 | return 0; | |
918 | } | |
919 | ||
920 | ||
921 | static void scc_throttle (struct tty_struct * tty) | |
922 | { | |
923 | struct scc_port *port = (struct scc_port *)tty->driver_data; | |
924 | unsigned long flags; | |
925 | SCC_ACCESS_INIT(port); | |
926 | ||
927 | if (tty->termios->c_cflag & CRTSCTS) { | |
928 | local_irq_save(flags); | |
929 | SCCmod(TX_CTRL_REG, ~TCR_RTS, 0); | |
930 | local_irq_restore(flags); | |
931 | } | |
932 | if (I_IXOFF(tty)) | |
933 | scc_send_xchar(tty, STOP_CHAR(tty)); | |
934 | } | |
935 | ||
936 | ||
937 | static void scc_unthrottle (struct tty_struct * tty) | |
938 | { | |
939 | struct scc_port *port = (struct scc_port *)tty->driver_data; | |
940 | unsigned long flags; | |
941 | SCC_ACCESS_INIT(port); | |
942 | ||
943 | if (tty->termios->c_cflag & CRTSCTS) { | |
944 | local_irq_save(flags); | |
945 | SCCmod(TX_CTRL_REG, 0xff, TCR_RTS); | |
946 | local_irq_restore(flags); | |
947 | } | |
948 | if (I_IXOFF(tty)) | |
949 | scc_send_xchar(tty, START_CHAR(tty)); | |
950 | } | |
951 | ||
952 | ||
953 | static int scc_ioctl(struct tty_struct *tty, struct file *file, | |
954 | unsigned int cmd, unsigned long arg) | |
955 | { | |
956 | return -ENOIOCTLCMD; | |
957 | } | |
958 | ||
959 | ||
960 | static void scc_break_ctl(struct tty_struct *tty, int break_state) | |
961 | { | |
962 | struct scc_port *port = (struct scc_port *)tty->driver_data; | |
963 | unsigned long flags; | |
964 | SCC_ACCESS_INIT(port); | |
965 | ||
966 | local_irq_save(flags); | |
967 | SCCmod(TX_CTRL_REG, ~TCR_SEND_BREAK, | |
968 | break_state ? TCR_SEND_BREAK : 0); | |
969 | local_irq_restore(flags); | |
970 | } | |
971 | ||
972 | ||
973 | /*--------------------------------------------------------------------------- | |
974 | * Serial console stuff... | |
975 | *--------------------------------------------------------------------------*/ | |
976 | ||
977 | #define scc_delay() do { __asm__ __volatile__ (" nop; nop"); } while (0) | |
978 | ||
979 | static void scc_ch_write (char ch) | |
980 | { | |
981 | volatile char *p = NULL; | |
982 | ||
983 | #ifdef CONFIG_MVME147_SCC | |
984 | if (MACH_IS_MVME147) | |
985 | p = (volatile char *)M147_SCC_A_ADDR; | |
986 | #endif | |
987 | #ifdef CONFIG_MVME162_SCC | |
988 | if (MACH_IS_MVME16x) | |
989 | p = (volatile char *)MVME_SCC_A_ADDR; | |
990 | #endif | |
991 | #ifdef CONFIG_BVME6000_SCC | |
992 | if (MACH_IS_BVME6000) | |
993 | p = (volatile char *)BVME_SCC_A_ADDR; | |
994 | #endif | |
995 | ||
996 | do { | |
997 | scc_delay(); | |
998 | } | |
999 | while (!(*p & 4)); | |
1000 | scc_delay(); | |
1001 | *p = 8; | |
1002 | scc_delay(); | |
1003 | *p = ch; | |
1004 | } | |
1005 | ||
1006 | /* The console must be locked when we get here. */ | |
1007 | ||
1008 | static void scc_console_write (struct console *co, const char *str, unsigned count) | |
1009 | { | |
1010 | unsigned long flags; | |
1011 | ||
1012 | local_irq_save(flags); | |
1013 | ||
1014 | while (count--) | |
1015 | { | |
1016 | if (*str == '\n') | |
1017 | scc_ch_write ('\r'); | |
1018 | scc_ch_write (*str++); | |
1019 | } | |
1020 | local_irq_restore(flags); | |
1021 | } | |
1022 | ||
1023 | static struct tty_driver *scc_console_device(struct console *c, int *index) | |
1024 | { | |
1025 | *index = c->index; | |
1026 | return scc_driver; | |
1027 | } | |
1028 | ||
1029 | ||
1030 | static int __init scc_console_setup(struct console *co, char *options) | |
1031 | { | |
1032 | return 0; | |
1033 | } | |
1034 | ||
1035 | ||
1036 | static struct console sercons = { | |
1037 | .name = "ttyS", | |
1038 | .write = scc_console_write, | |
1039 | .device = scc_console_device, | |
1040 | .setup = scc_console_setup, | |
1041 | .flags = CON_PRINTBUFFER, | |
1042 | .index = -1, | |
1043 | }; | |
1044 | ||
1045 | ||
1046 | static int __init vme_scc_console_init(void) | |
1047 | { | |
1048 | if (vme_brdtype == VME_TYPE_MVME147 || | |
1049 | vme_brdtype == VME_TYPE_MVME162 || | |
1050 | vme_brdtype == VME_TYPE_MVME172 || | |
1051 | vme_brdtype == VME_TYPE_BVME4000 || | |
1052 | vme_brdtype == VME_TYPE_BVME6000) | |
1053 | register_console(&sercons); | |
1054 | return 0; | |
1055 | } | |
1056 | console_initcall(vme_scc_console_init); |