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1da177e4 LT |
1 | /* |
2 | * specialix.c -- specialix IO8+ multiport serial driver. | |
3 | * | |
4 | * Copyright (C) 1997 Roger Wolff (R.E.Wolff@BitWizard.nl) | |
5 | * Copyright (C) 1994-1996 Dmitry Gorodchanin (pgmdsg@ibi.com) | |
6 | * | |
7 | * Specialix pays for the development and support of this driver. | |
8 | * Please DO contact io8-linux@specialix.co.uk if you require | |
9 | * support. But please read the documentation (specialix.txt) | |
10 | * first. | |
11 | * | |
12 | * This driver was developped in the BitWizard linux device | |
13 | * driver service. If you require a linux device driver for your | |
14 | * product, please contact devices@BitWizard.nl for a quote. | |
15 | * | |
16 | * This code is firmly based on the riscom/8 serial driver, | |
17 | * written by Dmitry Gorodchanin. The specialix IO8+ card | |
18 | * programming information was obtained from the CL-CD1865 Data | |
19 | * Book, and Specialix document number 6200059: IO8+ Hardware | |
20 | * Functional Specification. | |
21 | * | |
22 | * This program is free software; you can redistribute it and/or | |
23 | * modify it under the terms of the GNU General Public License as | |
24 | * published by the Free Software Foundation; either version 2 of | |
25 | * the License, or (at your option) any later version. | |
26 | * | |
27 | * This program is distributed in the hope that it will be | |
28 | * useful, but WITHOUT ANY WARRANTY; without even the implied | |
29 | * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR | |
30 | * PURPOSE. See the GNU General Public License for more details. | |
31 | * | |
32 | * You should have received a copy of the GNU General Public | |
33 | * License along with this program; if not, write to the Free | |
34 | * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, | |
35 | * USA. | |
36 | * | |
37 | * Revision history: | |
38 | * | |
39 | * Revision 1.0: April 1st 1997. | |
40 | * Initial release for alpha testing. | |
41 | * Revision 1.1: April 14th 1997. | |
42 | * Incorporated Richard Hudsons suggestions, | |
43 | * removed some debugging printk's. | |
44 | * Revision 1.2: April 15th 1997. | |
45 | * Ported to 2.1.x kernels. | |
46 | * Revision 1.3: April 17th 1997 | |
47 | * Backported to 2.0. (Compatibility macros). | |
48 | * Revision 1.4: April 18th 1997 | |
49 | * Fixed DTR/RTS bug that caused the card to indicate | |
50 | * "don't send data" to a modem after the password prompt. | |
51 | * Fixed bug for premature (fake) interrupts. | |
52 | * Revision 1.5: April 19th 1997 | |
53 | * fixed a minor typo in the header file, cleanup a little. | |
54 | * performance warnings are now MAXed at once per minute. | |
55 | * Revision 1.6: May 23 1997 | |
56 | * Changed the specialix=... format to include interrupt. | |
57 | * Revision 1.7: May 27 1997 | |
58 | * Made many more debug printk's a compile time option. | |
59 | * Revision 1.8: Jul 1 1997 | |
60 | * port to linux-2.1.43 kernel. | |
61 | * Revision 1.9: Oct 9 1998 | |
62 | * Added stuff for the IO8+/PCI version. | |
63 | * Revision 1.10: Oct 22 1999 / Jan 21 2000. | |
64 | * Added stuff for setserial. | |
65 | * Nicolas Mailhot (Nicolas.Mailhot@email.enst.fr) | |
66 | * | |
67 | */ | |
68 | ||
69 | #define VERSION "1.11" | |
70 | ||
71 | ||
72 | /* | |
73 | * There is a bunch of documentation about the card, jumpers, config | |
74 | * settings, restrictions, cables, device names and numbers in | |
75 | * Documentation/specialix.txt | |
76 | */ | |
77 | ||
78 | #include <linux/config.h> | |
79 | #include <linux/module.h> | |
80 | ||
81 | #include <asm/io.h> | |
82 | #include <linux/kernel.h> | |
83 | #include <linux/sched.h> | |
84 | #include <linux/ioport.h> | |
85 | #include <linux/interrupt.h> | |
86 | #include <linux/errno.h> | |
87 | #include <linux/tty.h> | |
88 | #include <linux/mm.h> | |
89 | #include <linux/serial.h> | |
90 | #include <linux/fcntl.h> | |
91 | #include <linux/major.h> | |
92 | #include <linux/delay.h> | |
93 | #include <linux/version.h> | |
94 | #include <linux/pci.h> | |
95 | #include <linux/init.h> | |
96 | #include <asm/uaccess.h> | |
97 | ||
98 | #include "specialix_io8.h" | |
99 | #include "cd1865.h" | |
100 | ||
101 | ||
102 | /* | |
103 | This driver can spew a whole lot of debugging output at you. If you | |
104 | need maximum performance, you should disable the DEBUG define. To | |
105 | aid in debugging in the field, I'm leaving the compile-time debug | |
106 | features enabled, and disable them "runtime". That allows me to | |
107 | instruct people with problems to enable debugging without requiring | |
108 | them to recompile... | |
109 | */ | |
110 | #define DEBUG | |
111 | ||
112 | static int sx_debug; | |
113 | static int sx_rxfifo = SPECIALIX_RXFIFO; | |
114 | ||
115 | #ifdef DEBUG | |
116 | #define dprintk(f, str...) if (sx_debug & f) printk (str) | |
117 | #else | |
118 | #define dprintk(f, str...) /* nothing */ | |
119 | #endif | |
120 | ||
121 | #define SX_DEBUG_FLOW 0x0001 | |
122 | #define SX_DEBUG_DATA 0x0002 | |
123 | #define SX_DEBUG_PROBE 0x0004 | |
124 | #define SX_DEBUG_CHAN 0x0008 | |
125 | #define SX_DEBUG_INIT 0x0010 | |
126 | #define SX_DEBUG_RX 0x0020 | |
127 | #define SX_DEBUG_TX 0x0040 | |
128 | #define SX_DEBUG_IRQ 0x0080 | |
129 | #define SX_DEBUG_OPEN 0x0100 | |
130 | #define SX_DEBUG_TERMIOS 0x0200 | |
131 | #define SX_DEBUG_SIGNALS 0x0400 | |
132 | #define SX_DEBUG_FIFO 0x0800 | |
133 | ||
134 | ||
135 | #define func_enter() dprintk (SX_DEBUG_FLOW, "io8: enter %s\n",__FUNCTION__) | |
136 | #define func_exit() dprintk (SX_DEBUG_FLOW, "io8: exit %s\n", __FUNCTION__) | |
137 | ||
138 | #define jiffies_from_ms(a) ((((a) * HZ)/1000)+1) | |
139 | ||
140 | ||
141 | /* Configurable options: */ | |
142 | ||
143 | /* Am I paranoid or not ? ;-) */ | |
144 | #define SPECIALIX_PARANOIA_CHECK | |
145 | ||
146 | /* Do I trust the IRQ from the card? (enabeling it doesn't seem to help) | |
147 | When the IRQ routine leaves the chip in a state that is keeps on | |
148 | requiring attention, the timer doesn't help either. */ | |
149 | #undef SPECIALIX_TIMER | |
150 | ||
151 | #ifdef SPECIALIX_TIMER | |
152 | static int sx_poll = HZ; | |
153 | #endif | |
154 | ||
155 | ||
156 | ||
157 | /* | |
158 | * The following defines are mostly for testing purposes. But if you need | |
159 | * some nice reporting in your syslog, you can define them also. | |
160 | */ | |
161 | #undef SX_REPORT_FIFO | |
162 | #undef SX_REPORT_OVERRUN | |
163 | ||
164 | ||
165 | ||
166 | #ifdef CONFIG_SPECIALIX_RTSCTS | |
167 | #define SX_CRTSCTS(bla) 1 | |
168 | #else | |
169 | #define SX_CRTSCTS(tty) C_CRTSCTS(tty) | |
170 | #endif | |
171 | ||
172 | ||
173 | /* Used to be outb (0xff, 0x80); */ | |
174 | #define short_pause() udelay (1) | |
175 | ||
176 | ||
177 | #define SPECIALIX_LEGAL_FLAGS \ | |
178 | (ASYNC_HUP_NOTIFY | ASYNC_SAK | ASYNC_SPLIT_TERMIOS | \ | |
179 | ASYNC_SPD_HI | ASYNC_SPEED_VHI | ASYNC_SESSION_LOCKOUT | \ | |
180 | ASYNC_PGRP_LOCKOUT | ASYNC_CALLOUT_NOHUP) | |
181 | ||
182 | #undef RS_EVENT_WRITE_WAKEUP | |
183 | #define RS_EVENT_WRITE_WAKEUP 0 | |
184 | ||
185 | static struct tty_driver *specialix_driver; | |
186 | static unsigned char * tmp_buf; | |
187 | static DECLARE_MUTEX(tmp_buf_sem); | |
188 | ||
189 | static unsigned long baud_table[] = { | |
190 | 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800, | |
191 | 9600, 19200, 38400, 57600, 115200, 0, | |
192 | }; | |
193 | ||
194 | static struct specialix_board sx_board[SX_NBOARD] = { | |
195 | { 0, SX_IOBASE1, 9, }, | |
196 | { 0, SX_IOBASE2, 11, }, | |
197 | { 0, SX_IOBASE3, 12, }, | |
198 | { 0, SX_IOBASE4, 15, }, | |
199 | }; | |
200 | ||
201 | static struct specialix_port sx_port[SX_NBOARD * SX_NPORT]; | |
202 | ||
203 | ||
204 | #ifdef SPECIALIX_TIMER | |
205 | static struct timer_list missed_irq_timer; | |
206 | static irqreturn_t sx_interrupt(int irq, void * dev_id, struct pt_regs * regs); | |
207 | #endif | |
208 | ||
209 | ||
210 | ||
211 | static inline int sx_paranoia_check(struct specialix_port const * port, | |
212 | char *name, const char *routine) | |
213 | { | |
214 | #ifdef SPECIALIX_PARANOIA_CHECK | |
215 | static const char *badmagic = | |
216 | KERN_ERR "sx: Warning: bad specialix port magic number for device %s in %s\n"; | |
217 | static const char *badinfo = | |
218 | KERN_ERR "sx: Warning: null specialix port for device %s in %s\n"; | |
219 | ||
220 | if (!port) { | |
221 | printk(badinfo, name, routine); | |
222 | return 1; | |
223 | } | |
224 | if (port->magic != SPECIALIX_MAGIC) { | |
225 | printk(badmagic, name, routine); | |
226 | return 1; | |
227 | } | |
228 | #endif | |
229 | return 0; | |
230 | } | |
231 | ||
232 | ||
233 | /* | |
234 | * | |
235 | * Service functions for specialix IO8+ driver. | |
236 | * | |
237 | */ | |
238 | ||
239 | /* Get board number from pointer */ | |
240 | static inline int board_No (struct specialix_board * bp) | |
241 | { | |
242 | return bp - sx_board; | |
243 | } | |
244 | ||
245 | ||
246 | /* Get port number from pointer */ | |
247 | static inline int port_No (struct specialix_port const * port) | |
248 | { | |
249 | return SX_PORT(port - sx_port); | |
250 | } | |
251 | ||
252 | ||
253 | /* Get pointer to board from pointer to port */ | |
254 | static inline struct specialix_board * port_Board(struct specialix_port const * port) | |
255 | { | |
256 | return &sx_board[SX_BOARD(port - sx_port)]; | |
257 | } | |
258 | ||
259 | ||
260 | /* Input Byte from CL CD186x register */ | |
261 | static inline unsigned char sx_in(struct specialix_board * bp, unsigned short reg) | |
262 | { | |
263 | bp->reg = reg | 0x80; | |
264 | outb (reg | 0x80, bp->base + SX_ADDR_REG); | |
265 | return inb (bp->base + SX_DATA_REG); | |
266 | } | |
267 | ||
268 | ||
269 | /* Output Byte to CL CD186x register */ | |
270 | static inline void sx_out(struct specialix_board * bp, unsigned short reg, | |
271 | unsigned char val) | |
272 | { | |
273 | bp->reg = reg | 0x80; | |
274 | outb (reg | 0x80, bp->base + SX_ADDR_REG); | |
275 | outb (val, bp->base + SX_DATA_REG); | |
276 | } | |
277 | ||
278 | ||
279 | /* Input Byte from CL CD186x register */ | |
280 | static inline unsigned char sx_in_off(struct specialix_board * bp, unsigned short reg) | |
281 | { | |
282 | bp->reg = reg; | |
283 | outb (reg, bp->base + SX_ADDR_REG); | |
284 | return inb (bp->base + SX_DATA_REG); | |
285 | } | |
286 | ||
287 | ||
288 | /* Output Byte to CL CD186x register */ | |
289 | static inline void sx_out_off(struct specialix_board * bp, unsigned short reg, | |
290 | unsigned char val) | |
291 | { | |
292 | bp->reg = reg; | |
293 | outb (reg, bp->base + SX_ADDR_REG); | |
294 | outb (val, bp->base + SX_DATA_REG); | |
295 | } | |
296 | ||
297 | ||
298 | /* Wait for Channel Command Register ready */ | |
299 | static inline void sx_wait_CCR(struct specialix_board * bp) | |
300 | { | |
301 | unsigned long delay, flags; | |
302 | unsigned char ccr; | |
303 | ||
304 | for (delay = SX_CCR_TIMEOUT; delay; delay--) { | |
305 | spin_lock_irqsave(&bp->lock, flags); | |
306 | ccr = sx_in(bp, CD186x_CCR); | |
307 | spin_unlock_irqrestore(&bp->lock, flags); | |
308 | if (!ccr) | |
309 | return; | |
310 | udelay (1); | |
311 | } | |
312 | ||
313 | printk(KERN_ERR "sx%d: Timeout waiting for CCR.\n", board_No(bp)); | |
314 | } | |
315 | ||
316 | ||
317 | /* Wait for Channel Command Register ready */ | |
318 | static inline void sx_wait_CCR_off(struct specialix_board * bp) | |
319 | { | |
320 | unsigned long delay; | |
321 | unsigned char crr; | |
322 | unsigned long flags; | |
323 | ||
324 | for (delay = SX_CCR_TIMEOUT; delay; delay--) { | |
325 | spin_lock_irqsave(&bp->lock, flags); | |
326 | crr = sx_in_off(bp, CD186x_CCR); | |
327 | spin_unlock_irqrestore(&bp->lock, flags); | |
328 | if (!crr) | |
329 | return; | |
330 | udelay (1); | |
331 | } | |
332 | ||
333 | printk(KERN_ERR "sx%d: Timeout waiting for CCR.\n", board_No(bp)); | |
334 | } | |
335 | ||
336 | ||
337 | /* | |
338 | * specialix IO8+ IO range functions. | |
339 | */ | |
340 | ||
341 | static inline int sx_check_io_range(struct specialix_board * bp) | |
342 | { | |
343 | return check_region (bp->base, SX_IO_SPACE); | |
344 | } | |
345 | ||
346 | ||
347 | static inline void sx_request_io_range(struct specialix_board * bp) | |
348 | { | |
349 | request_region(bp->base, | |
350 | bp->flags&SX_BOARD_IS_PCI?SX_PCI_IO_SPACE:SX_IO_SPACE, | |
351 | "specialix IO8+" ); | |
352 | } | |
353 | ||
354 | ||
355 | static inline void sx_release_io_range(struct specialix_board * bp) | |
356 | { | |
357 | release_region(bp->base, | |
358 | bp->flags&SX_BOARD_IS_PCI?SX_PCI_IO_SPACE:SX_IO_SPACE); | |
359 | } | |
360 | ||
361 | ||
362 | /* Must be called with enabled interrupts */ | |
363 | /* Ugly. Very ugly. Don't use this for anything else than initialization | |
364 | code */ | |
365 | static inline void sx_long_delay(unsigned long delay) | |
366 | { | |
367 | unsigned long i; | |
368 | ||
369 | for (i = jiffies + delay; time_after(i, jiffies); ) ; | |
370 | } | |
371 | ||
372 | ||
373 | ||
374 | /* Set the IRQ using the RTS lines that run to the PAL on the board.... */ | |
375 | static int sx_set_irq ( struct specialix_board *bp) | |
376 | { | |
377 | int virq; | |
378 | int i; | |
379 | unsigned long flags; | |
380 | ||
381 | if (bp->flags & SX_BOARD_IS_PCI) | |
382 | return 1; | |
383 | switch (bp->irq) { | |
384 | /* In the same order as in the docs... */ | |
385 | case 15: virq = 0;break; | |
386 | case 12: virq = 1;break; | |
387 | case 11: virq = 2;break; | |
388 | case 9: virq = 3;break; | |
389 | default: printk (KERN_ERR "Speclialix: cannot set irq to %d.\n", bp->irq); | |
390 | return 0; | |
391 | } | |
392 | spin_lock_irqsave(&bp->lock, flags); | |
393 | for (i=0;i<2;i++) { | |
394 | sx_out(bp, CD186x_CAR, i); | |
395 | sx_out(bp, CD186x_MSVRTS, ((virq >> i) & 0x1)? MSVR_RTS:0); | |
396 | } | |
397 | spin_unlock_irqrestore(&bp->lock, flags); | |
398 | return 1; | |
399 | } | |
400 | ||
401 | ||
402 | /* Reset and setup CD186x chip */ | |
403 | static int sx_init_CD186x(struct specialix_board * bp) | |
404 | { | |
405 | unsigned long flags; | |
406 | int scaler; | |
407 | int rv = 1; | |
408 | ||
409 | func_enter(); | |
410 | sx_wait_CCR_off(bp); /* Wait for CCR ready */ | |
411 | spin_lock_irqsave(&bp->lock, flags); | |
412 | sx_out_off(bp, CD186x_CCR, CCR_HARDRESET); /* Reset CD186x chip */ | |
413 | spin_unlock_irqrestore(&bp->lock, flags); | |
414 | sx_long_delay(HZ/20); /* Delay 0.05 sec */ | |
415 | spin_lock_irqsave(&bp->lock, flags); | |
416 | sx_out_off(bp, CD186x_GIVR, SX_ID); /* Set ID for this chip */ | |
417 | sx_out_off(bp, CD186x_GICR, 0); /* Clear all bits */ | |
418 | sx_out_off(bp, CD186x_PILR1, SX_ACK_MINT); /* Prio for modem intr */ | |
419 | sx_out_off(bp, CD186x_PILR2, SX_ACK_TINT); /* Prio for transmitter intr */ | |
420 | sx_out_off(bp, CD186x_PILR3, SX_ACK_RINT); /* Prio for receiver intr */ | |
421 | /* Set RegAckEn */ | |
422 | sx_out_off(bp, CD186x_SRCR, sx_in (bp, CD186x_SRCR) | SRCR_REGACKEN); | |
423 | ||
424 | /* Setting up prescaler. We need 4 ticks per 1 ms */ | |
425 | scaler = SX_OSCFREQ/SPECIALIX_TPS; | |
426 | ||
427 | sx_out_off(bp, CD186x_PPRH, scaler >> 8); | |
428 | sx_out_off(bp, CD186x_PPRL, scaler & 0xff); | |
429 | spin_unlock_irqrestore(&bp->lock, flags); | |
430 | ||
431 | if (!sx_set_irq (bp)) { | |
432 | /* Figure out how to pass this along... */ | |
433 | printk (KERN_ERR "Cannot set irq to %d.\n", bp->irq); | |
434 | rv = 0; | |
435 | } | |
436 | ||
437 | func_exit(); | |
438 | return rv; | |
439 | } | |
440 | ||
441 | ||
442 | static int read_cross_byte (struct specialix_board *bp, int reg, int bit) | |
443 | { | |
444 | int i; | |
445 | int t; | |
446 | unsigned long flags; | |
447 | ||
448 | spin_lock_irqsave(&bp->lock, flags); | |
449 | for (i=0, t=0;i<8;i++) { | |
450 | sx_out_off (bp, CD186x_CAR, i); | |
451 | if (sx_in_off (bp, reg) & bit) | |
452 | t |= 1 << i; | |
453 | } | |
454 | spin_unlock_irqrestore(&bp->lock, flags); | |
455 | ||
456 | return t; | |
457 | } | |
458 | ||
459 | ||
460 | #ifdef SPECIALIX_TIMER | |
461 | void missed_irq (unsigned long data) | |
462 | { | |
463 | unsigned char irq; | |
464 | unsigned long flags; | |
465 | struct specialix_board *bp = (struct specialix_board *)data; | |
466 | ||
467 | spin_lock_irqsave(&bp->lock, flags); | |
468 | irq = sx_in ((struct specialix_board *)data, CD186x_SRSR) & | |
469 | (SRSR_RREQint | | |
470 | SRSR_TREQint | | |
471 | SRSR_MREQint); | |
472 | spin_unlock_irqrestore(&bp->lock, flags); | |
473 | if (irq) { | |
474 | printk (KERN_INFO "Missed interrupt... Calling int from timer. \n"); | |
475 | sx_interrupt (((struct specialix_board *)data)->irq, | |
476 | (void*)data, NULL); | |
477 | } | |
478 | missed_irq_timer.expires = jiffies + sx_poll; | |
479 | add_timer (&missed_irq_timer); | |
480 | } | |
481 | #endif | |
482 | ||
483 | ||
484 | ||
485 | /* Main probing routine, also sets irq. */ | |
486 | static int sx_probe(struct specialix_board *bp) | |
487 | { | |
488 | unsigned char val1, val2; | |
489 | #if 0 | |
490 | int irqs = 0; | |
491 | int retries; | |
492 | #endif | |
493 | int rev; | |
494 | int chip; | |
495 | ||
496 | func_enter(); | |
497 | ||
498 | if (sx_check_io_range(bp)) { | |
499 | func_exit(); | |
500 | return 1; | |
501 | } | |
502 | ||
503 | /* Are the I/O ports here ? */ | |
504 | sx_out_off(bp, CD186x_PPRL, 0x5a); | |
505 | short_pause (); | |
506 | val1 = sx_in_off(bp, CD186x_PPRL); | |
507 | ||
508 | sx_out_off(bp, CD186x_PPRL, 0xa5); | |
509 | short_pause (); | |
510 | val2 = sx_in_off(bp, CD186x_PPRL); | |
511 | ||
512 | ||
513 | if ((val1 != 0x5a) || (val2 != 0xa5)) { | |
514 | printk(KERN_INFO "sx%d: specialix IO8+ Board at 0x%03x not found.\n", | |
515 | board_No(bp), bp->base); | |
516 | func_exit(); | |
517 | return 1; | |
518 | } | |
519 | ||
520 | /* Check the DSR lines that Specialix uses as board | |
521 | identification */ | |
522 | val1 = read_cross_byte (bp, CD186x_MSVR, MSVR_DSR); | |
523 | val2 = read_cross_byte (bp, CD186x_MSVR, MSVR_RTS); | |
524 | dprintk (SX_DEBUG_INIT, "sx%d: DSR lines are: %02x, rts lines are: %02x\n", | |
525 | board_No(bp), val1, val2); | |
526 | ||
527 | /* They managed to switch the bit order between the docs and | |
528 | the IO8+ card. The new PCI card now conforms to old docs. | |
529 | They changed the PCI docs to reflect the situation on the | |
530 | old card. */ | |
531 | val2 = (bp->flags & SX_BOARD_IS_PCI)?0x4d : 0xb2; | |
532 | if (val1 != val2) { | |
533 | printk(KERN_INFO "sx%d: specialix IO8+ ID %02x at 0x%03x not found (%02x).\n", | |
534 | board_No(bp), val2, bp->base, val1); | |
535 | func_exit(); | |
536 | return 1; | |
537 | } | |
538 | ||
539 | ||
540 | #if 0 | |
541 | /* It's time to find IRQ for this board */ | |
542 | for (retries = 0; retries < 5 && irqs <= 0; retries++) { | |
543 | irqs = probe_irq_on(); | |
544 | sx_init_CD186x(bp); /* Reset CD186x chip */ | |
545 | sx_out(bp, CD186x_CAR, 2); /* Select port 2 */ | |
546 | sx_wait_CCR(bp); | |
547 | sx_out(bp, CD186x_CCR, CCR_TXEN); /* Enable transmitter */ | |
548 | sx_out(bp, CD186x_IER, IER_TXRDY); /* Enable tx empty intr */ | |
549 | sx_long_delay(HZ/20); | |
550 | irqs = probe_irq_off(irqs); | |
551 | ||
552 | dprintk (SX_DEBUG_INIT, "SRSR = %02x, ", sx_in(bp, CD186x_SRSR)); | |
553 | dprintk (SX_DEBUG_INIT, "TRAR = %02x, ", sx_in(bp, CD186x_TRAR)); | |
554 | dprintk (SX_DEBUG_INIT, "GIVR = %02x, ", sx_in(bp, CD186x_GIVR)); | |
555 | dprintk (SX_DEBUG_INIT, "GICR = %02x, ", sx_in(bp, CD186x_GICR)); | |
556 | dprintk (SX_DEBUG_INIT, "\n"); | |
557 | ||
558 | /* Reset CD186x again */ | |
559 | if (!sx_init_CD186x(bp)) { | |
560 | /* Hmmm. This is dead code anyway. */ | |
561 | } | |
562 | ||
563 | dprintk (SX_DEBUG_INIT "val1 = %02x, val2 = %02x, val3 = %02x.\n", | |
564 | val1, val2, val3); | |
565 | ||
566 | } | |
567 | ||
568 | #if 0 | |
569 | if (irqs <= 0) { | |
570 | printk(KERN_ERR "sx%d: Can't find IRQ for specialix IO8+ board at 0x%03x.\n", | |
571 | board_No(bp), bp->base); | |
572 | func_exit(); | |
573 | return 1; | |
574 | } | |
575 | #endif | |
576 | printk (KERN_INFO "Started with irq=%d, but now have irq=%d.\n", bp->irq, irqs); | |
577 | if (irqs > 0) | |
578 | bp->irq = irqs; | |
579 | #endif | |
580 | /* Reset CD186x again */ | |
581 | if (!sx_init_CD186x(bp)) { | |
582 | func_exit(); | |
583 | return -EIO; | |
584 | } | |
585 | ||
586 | sx_request_io_range(bp); | |
587 | bp->flags |= SX_BOARD_PRESENT; | |
588 | ||
589 | /* Chip revcode pkgtype | |
590 | GFRCR SRCR bit 7 | |
591 | CD180 rev B 0x81 0 | |
592 | CD180 rev C 0x82 0 | |
593 | CD1864 rev A 0x82 1 | |
594 | CD1865 rev A 0x83 1 -- Do not use!!! Does not work. | |
595 | CD1865 rev B 0x84 1 | |
596 | -- Thanks to Gwen Wang, Cirrus Logic. | |
597 | */ | |
598 | ||
599 | switch (sx_in_off(bp, CD186x_GFRCR)) { | |
600 | case 0x82:chip = 1864;rev='A';break; | |
601 | case 0x83:chip = 1865;rev='A';break; | |
602 | case 0x84:chip = 1865;rev='B';break; | |
603 | case 0x85:chip = 1865;rev='C';break; /* Does not exist at this time */ | |
604 | default:chip=-1;rev='x'; | |
605 | } | |
606 | ||
607 | dprintk (SX_DEBUG_INIT, " GFCR = 0x%02x\n", sx_in_off(bp, CD186x_GFRCR) ); | |
608 | ||
609 | #ifdef SPECIALIX_TIMER | |
610 | init_timer (&missed_irq_timer); | |
611 | missed_irq_timer.function = missed_irq; | |
612 | missed_irq_timer.data = (unsigned long) bp; | |
613 | missed_irq_timer.expires = jiffies + sx_poll; | |
614 | add_timer (&missed_irq_timer); | |
615 | #endif | |
616 | ||
617 | printk(KERN_INFO"sx%d: specialix IO8+ board detected at 0x%03x, IRQ %d, CD%d Rev. %c.\n", | |
618 | board_No(bp), | |
619 | bp->base, bp->irq, | |
620 | chip, rev); | |
621 | ||
622 | func_exit(); | |
623 | return 0; | |
624 | } | |
625 | ||
626 | /* | |
627 | * | |
628 | * Interrupt processing routines. | |
629 | * */ | |
630 | ||
631 | static inline void sx_mark_event(struct specialix_port * port, int event) | |
632 | { | |
633 | func_enter(); | |
634 | ||
635 | set_bit(event, &port->event); | |
636 | schedule_work(&port->tqueue); | |
637 | ||
638 | func_exit(); | |
639 | } | |
640 | ||
641 | ||
642 | static inline struct specialix_port * sx_get_port(struct specialix_board * bp, | |
643 | unsigned char const * what) | |
644 | { | |
645 | unsigned char channel; | |
646 | struct specialix_port * port = NULL; | |
647 | ||
648 | channel = sx_in(bp, CD186x_GICR) >> GICR_CHAN_OFF; | |
649 | dprintk (SX_DEBUG_CHAN, "channel: %d\n", channel); | |
650 | if (channel < CD186x_NCH) { | |
651 | port = &sx_port[board_No(bp) * SX_NPORT + channel]; | |
652 | dprintk (SX_DEBUG_CHAN, "port: %d %p flags: 0x%x\n",board_No(bp) * SX_NPORT + channel, port, port->flags & ASYNC_INITIALIZED); | |
653 | ||
654 | if (port->flags & ASYNC_INITIALIZED) { | |
655 | dprintk (SX_DEBUG_CHAN, "port: %d %p\n", channel, port); | |
656 | func_exit(); | |
657 | return port; | |
658 | } | |
659 | } | |
660 | printk(KERN_INFO "sx%d: %s interrupt from invalid port %d\n", | |
661 | board_No(bp), what, channel); | |
662 | return NULL; | |
663 | } | |
664 | ||
665 | ||
666 | static inline void sx_receive_exc(struct specialix_board * bp) | |
667 | { | |
668 | struct specialix_port *port; | |
669 | struct tty_struct *tty; | |
670 | unsigned char status; | |
671 | unsigned char ch; | |
672 | ||
673 | func_enter(); | |
674 | ||
675 | port = sx_get_port(bp, "Receive"); | |
676 | if (!port) { | |
677 | dprintk (SX_DEBUG_RX, "Hmm, couldn't find port.\n"); | |
678 | func_exit(); | |
679 | return; | |
680 | } | |
681 | tty = port->tty; | |
682 | dprintk (SX_DEBUG_RX, "port: %p count: %d BUFF_SIZE: %d\n", | |
683 | port, tty->flip.count, TTY_FLIPBUF_SIZE); | |
684 | ||
685 | status = sx_in(bp, CD186x_RCSR); | |
686 | ||
687 | dprintk (SX_DEBUG_RX, "status: 0x%x\n", status); | |
688 | if (status & RCSR_OE) { | |
689 | port->overrun++; | |
690 | dprintk(SX_DEBUG_FIFO, "sx%d: port %d: Overrun. Total %ld overruns.\n", | |
691 | board_No(bp), port_No(port), port->overrun); | |
692 | } | |
693 | status &= port->mark_mask; | |
694 | ||
695 | /* This flip buffer check needs to be below the reading of the | |
696 | status register to reset the chip's IRQ.... */ | |
697 | if (tty->flip.count >= TTY_FLIPBUF_SIZE) { | |
698 | dprintk(SX_DEBUG_FIFO, "sx%d: port %d: Working around flip buffer overflow.\n", | |
699 | board_No(bp), port_No(port)); | |
700 | func_exit(); | |
701 | return; | |
702 | } | |
703 | ||
704 | ch = sx_in(bp, CD186x_RDR); | |
705 | if (!status) { | |
706 | func_exit(); | |
707 | return; | |
708 | } | |
709 | if (status & RCSR_TOUT) { | |
710 | printk(KERN_INFO "sx%d: port %d: Receiver timeout. Hardware problems ?\n", | |
711 | board_No(bp), port_No(port)); | |
712 | func_exit(); | |
713 | return; | |
714 | ||
715 | } else if (status & RCSR_BREAK) { | |
716 | dprintk(SX_DEBUG_RX, "sx%d: port %d: Handling break...\n", | |
717 | board_No(bp), port_No(port)); | |
718 | *tty->flip.flag_buf_ptr++ = TTY_BREAK; | |
719 | if (port->flags & ASYNC_SAK) | |
720 | do_SAK(tty); | |
721 | ||
722 | } else if (status & RCSR_PE) | |
723 | *tty->flip.flag_buf_ptr++ = TTY_PARITY; | |
724 | ||
725 | else if (status & RCSR_FE) | |
726 | *tty->flip.flag_buf_ptr++ = TTY_FRAME; | |
727 | ||
728 | else if (status & RCSR_OE) | |
729 | *tty->flip.flag_buf_ptr++ = TTY_OVERRUN; | |
730 | ||
731 | else | |
732 | *tty->flip.flag_buf_ptr++ = 0; | |
733 | ||
734 | *tty->flip.char_buf_ptr++ = ch; | |
735 | tty->flip.count++; | |
736 | schedule_delayed_work(&tty->flip.work, 1); | |
737 | ||
738 | func_exit(); | |
739 | } | |
740 | ||
741 | ||
742 | static inline void sx_receive(struct specialix_board * bp) | |
743 | { | |
744 | struct specialix_port *port; | |
745 | struct tty_struct *tty; | |
746 | unsigned char count; | |
747 | ||
748 | func_enter(); | |
749 | ||
750 | if (!(port = sx_get_port(bp, "Receive"))) { | |
751 | dprintk (SX_DEBUG_RX, "Hmm, couldn't find port.\n"); | |
752 | func_exit(); | |
753 | return; | |
754 | } | |
755 | tty = port->tty; | |
756 | ||
757 | count = sx_in(bp, CD186x_RDCR); | |
758 | dprintk (SX_DEBUG_RX, "port: %p: count: %d\n", port, count); | |
759 | port->hits[count > 8 ? 9 : count]++; | |
760 | ||
761 | while (count--) { | |
762 | if (tty->flip.count >= TTY_FLIPBUF_SIZE) { | |
763 | printk(KERN_INFO "sx%d: port %d: Working around flip buffer overflow.\n", | |
764 | board_No(bp), port_No(port)); | |
765 | break; | |
766 | } | |
767 | *tty->flip.char_buf_ptr++ = sx_in(bp, CD186x_RDR); | |
768 | *tty->flip.flag_buf_ptr++ = 0; | |
769 | tty->flip.count++; | |
770 | } | |
771 | schedule_delayed_work(&tty->flip.work, 1); | |
772 | ||
773 | func_exit(); | |
774 | } | |
775 | ||
776 | ||
777 | static inline void sx_transmit(struct specialix_board * bp) | |
778 | { | |
779 | struct specialix_port *port; | |
780 | struct tty_struct *tty; | |
781 | unsigned char count; | |
782 | ||
783 | func_enter(); | |
784 | if (!(port = sx_get_port(bp, "Transmit"))) { | |
785 | func_exit(); | |
786 | return; | |
787 | } | |
788 | dprintk (SX_DEBUG_TX, "port: %p\n", port); | |
789 | tty = port->tty; | |
790 | ||
791 | if (port->IER & IER_TXEMPTY) { | |
792 | /* FIFO drained */ | |
793 | sx_out(bp, CD186x_CAR, port_No(port)); | |
794 | port->IER &= ~IER_TXEMPTY; | |
795 | sx_out(bp, CD186x_IER, port->IER); | |
796 | func_exit(); | |
797 | return; | |
798 | } | |
799 | ||
800 | if ((port->xmit_cnt <= 0 && !port->break_length) | |
801 | || tty->stopped || tty->hw_stopped) { | |
802 | sx_out(bp, CD186x_CAR, port_No(port)); | |
803 | port->IER &= ~IER_TXRDY; | |
804 | sx_out(bp, CD186x_IER, port->IER); | |
805 | func_exit(); | |
806 | return; | |
807 | } | |
808 | ||
809 | if (port->break_length) { | |
810 | if (port->break_length > 0) { | |
811 | if (port->COR2 & COR2_ETC) { | |
812 | sx_out(bp, CD186x_TDR, CD186x_C_ESC); | |
813 | sx_out(bp, CD186x_TDR, CD186x_C_SBRK); | |
814 | port->COR2 &= ~COR2_ETC; | |
815 | } | |
816 | count = min_t(int, port->break_length, 0xff); | |
817 | sx_out(bp, CD186x_TDR, CD186x_C_ESC); | |
818 | sx_out(bp, CD186x_TDR, CD186x_C_DELAY); | |
819 | sx_out(bp, CD186x_TDR, count); | |
820 | if (!(port->break_length -= count)) | |
821 | port->break_length--; | |
822 | } else { | |
823 | sx_out(bp, CD186x_TDR, CD186x_C_ESC); | |
824 | sx_out(bp, CD186x_TDR, CD186x_C_EBRK); | |
825 | sx_out(bp, CD186x_COR2, port->COR2); | |
826 | sx_wait_CCR(bp); | |
827 | sx_out(bp, CD186x_CCR, CCR_CORCHG2); | |
828 | port->break_length = 0; | |
829 | } | |
830 | ||
831 | func_exit(); | |
832 | return; | |
833 | } | |
834 | ||
835 | count = CD186x_NFIFO; | |
836 | do { | |
837 | sx_out(bp, CD186x_TDR, port->xmit_buf[port->xmit_tail++]); | |
838 | port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE-1); | |
839 | if (--port->xmit_cnt <= 0) | |
840 | break; | |
841 | } while (--count > 0); | |
842 | ||
843 | if (port->xmit_cnt <= 0) { | |
844 | sx_out(bp, CD186x_CAR, port_No(port)); | |
845 | port->IER &= ~IER_TXRDY; | |
846 | sx_out(bp, CD186x_IER, port->IER); | |
847 | } | |
848 | if (port->xmit_cnt <= port->wakeup_chars) | |
849 | sx_mark_event(port, RS_EVENT_WRITE_WAKEUP); | |
850 | ||
851 | func_exit(); | |
852 | } | |
853 | ||
854 | ||
855 | static inline void sx_check_modem(struct specialix_board * bp) | |
856 | { | |
857 | struct specialix_port *port; | |
858 | struct tty_struct *tty; | |
859 | unsigned char mcr; | |
860 | int msvr_cd; | |
861 | ||
862 | dprintk (SX_DEBUG_SIGNALS, "Modem intr. "); | |
863 | if (!(port = sx_get_port(bp, "Modem"))) | |
864 | return; | |
865 | ||
866 | tty = port->tty; | |
867 | ||
868 | mcr = sx_in(bp, CD186x_MCR); | |
869 | printk ("mcr = %02x.\n", mcr); | |
870 | ||
871 | if ((mcr & MCR_CDCHG)) { | |
872 | dprintk (SX_DEBUG_SIGNALS, "CD just changed... "); | |
873 | msvr_cd = sx_in(bp, CD186x_MSVR) & MSVR_CD; | |
874 | if (msvr_cd) { | |
875 | dprintk (SX_DEBUG_SIGNALS, "Waking up guys in open.\n"); | |
876 | wake_up_interruptible(&port->open_wait); | |
877 | } else { | |
878 | dprintk (SX_DEBUG_SIGNALS, "Sending HUP.\n"); | |
879 | schedule_work(&port->tqueue_hangup); | |
880 | } | |
881 | } | |
882 | ||
883 | #ifdef SPECIALIX_BRAIN_DAMAGED_CTS | |
884 | if (mcr & MCR_CTSCHG) { | |
885 | if (sx_in(bp, CD186x_MSVR) & MSVR_CTS) { | |
886 | tty->hw_stopped = 0; | |
887 | port->IER |= IER_TXRDY; | |
888 | if (port->xmit_cnt <= port->wakeup_chars) | |
889 | sx_mark_event(port, RS_EVENT_WRITE_WAKEUP); | |
890 | } else { | |
891 | tty->hw_stopped = 1; | |
892 | port->IER &= ~IER_TXRDY; | |
893 | } | |
894 | sx_out(bp, CD186x_IER, port->IER); | |
895 | } | |
896 | if (mcr & MCR_DSSXHG) { | |
897 | if (sx_in(bp, CD186x_MSVR) & MSVR_DSR) { | |
898 | tty->hw_stopped = 0; | |
899 | port->IER |= IER_TXRDY; | |
900 | if (port->xmit_cnt <= port->wakeup_chars) | |
901 | sx_mark_event(port, RS_EVENT_WRITE_WAKEUP); | |
902 | } else { | |
903 | tty->hw_stopped = 1; | |
904 | port->IER &= ~IER_TXRDY; | |
905 | } | |
906 | sx_out(bp, CD186x_IER, port->IER); | |
907 | } | |
908 | #endif /* SPECIALIX_BRAIN_DAMAGED_CTS */ | |
909 | ||
910 | /* Clear change bits */ | |
911 | sx_out(bp, CD186x_MCR, 0); | |
912 | } | |
913 | ||
914 | ||
915 | /* The main interrupt processing routine */ | |
916 | static irqreturn_t sx_interrupt(int irq, void *dev_id, struct pt_regs *regs) | |
917 | { | |
918 | unsigned char status; | |
919 | unsigned char ack; | |
920 | struct specialix_board *bp; | |
921 | unsigned long loop = 0; | |
922 | int saved_reg; | |
923 | unsigned long flags; | |
924 | ||
925 | func_enter(); | |
926 | ||
927 | bp = dev_id; | |
928 | spin_lock_irqsave(&bp->lock, flags); | |
929 | ||
930 | dprintk (SX_DEBUG_FLOW, "enter %s port %d room: %ld\n", __FUNCTION__, port_No(sx_get_port(bp, "INT")), SERIAL_XMIT_SIZE - sx_get_port(bp, "ITN")->xmit_cnt - 1); | |
931 | if (!bp || !(bp->flags & SX_BOARD_ACTIVE)) { | |
932 | dprintk (SX_DEBUG_IRQ, "sx: False interrupt. irq %d.\n", irq); | |
933 | spin_unlock_irqrestore(&bp->lock, flags); | |
934 | func_exit(); | |
935 | return IRQ_NONE; | |
936 | } | |
937 | ||
938 | saved_reg = bp->reg; | |
939 | ||
940 | while ((++loop < 16) && (status = (sx_in(bp, CD186x_SRSR) & | |
941 | (SRSR_RREQint | | |
942 | SRSR_TREQint | | |
943 | SRSR_MREQint)))) { | |
944 | if (status & SRSR_RREQint) { | |
945 | ack = sx_in(bp, CD186x_RRAR); | |
946 | ||
947 | if (ack == (SX_ID | GIVR_IT_RCV)) | |
948 | sx_receive(bp); | |
949 | else if (ack == (SX_ID | GIVR_IT_REXC)) | |
950 | sx_receive_exc(bp); | |
951 | else | |
952 | printk(KERN_ERR "sx%d: status: 0x%x Bad receive ack 0x%02x.\n", | |
953 | board_No(bp), status, ack); | |
954 | ||
955 | } else if (status & SRSR_TREQint) { | |
956 | ack = sx_in(bp, CD186x_TRAR); | |
957 | ||
958 | if (ack == (SX_ID | GIVR_IT_TX)) | |
959 | sx_transmit(bp); | |
960 | else | |
961 | printk(KERN_ERR "sx%d: status: 0x%x Bad transmit ack 0x%02x. port: %d\n", | |
962 | board_No(bp), status, ack, port_No (sx_get_port (bp, "Int"))); | |
963 | } else if (status & SRSR_MREQint) { | |
964 | ack = sx_in(bp, CD186x_MRAR); | |
965 | ||
966 | if (ack == (SX_ID | GIVR_IT_MODEM)) | |
967 | sx_check_modem(bp); | |
968 | else | |
969 | printk(KERN_ERR "sx%d: status: 0x%x Bad modem ack 0x%02x.\n", | |
970 | board_No(bp), status, ack); | |
971 | ||
972 | } | |
973 | ||
974 | sx_out(bp, CD186x_EOIR, 0); /* Mark end of interrupt */ | |
975 | } | |
976 | bp->reg = saved_reg; | |
977 | outb (bp->reg, bp->base + SX_ADDR_REG); | |
978 | spin_unlock_irqrestore(&bp->lock, flags); | |
979 | func_exit(); | |
980 | return IRQ_HANDLED; | |
981 | } | |
982 | ||
983 | ||
984 | /* | |
985 | * Routines for open & close processing. | |
986 | */ | |
987 | ||
988 | static void turn_ints_off (struct specialix_board *bp) | |
989 | { | |
990 | unsigned long flags; | |
991 | ||
992 | func_enter(); | |
993 | if (bp->flags & SX_BOARD_IS_PCI) { | |
994 | /* This was intended for enabeling the interrupt on the | |
995 | * PCI card. However it seems that it's already enabled | |
996 | * and as PCI interrupts can be shared, there is no real | |
997 | * reason to have to turn it off. */ | |
998 | } | |
999 | ||
1000 | spin_lock_irqsave(&bp->lock, flags); | |
1001 | (void) sx_in_off (bp, 0); /* Turn off interrupts. */ | |
1002 | spin_unlock_irqrestore(&bp->lock, flags); | |
1003 | ||
1004 | func_exit(); | |
1005 | } | |
1006 | ||
1007 | static void turn_ints_on (struct specialix_board *bp) | |
1008 | { | |
1009 | unsigned long flags; | |
1010 | ||
1011 | func_enter(); | |
1012 | ||
1013 | if (bp->flags & SX_BOARD_IS_PCI) { | |
1014 | /* play with the PCI chip. See comment above. */ | |
1015 | } | |
1016 | spin_lock_irqsave(&bp->lock, flags); | |
1017 | (void) sx_in (bp, 0); /* Turn ON interrupts. */ | |
1018 | spin_unlock_irqrestore(&bp->lock, flags); | |
1019 | ||
1020 | func_exit(); | |
1021 | } | |
1022 | ||
1023 | ||
1024 | /* Called with disabled interrupts */ | |
1025 | static inline int sx_setup_board(struct specialix_board * bp) | |
1026 | { | |
1027 | int error; | |
1028 | ||
1029 | if (bp->flags & SX_BOARD_ACTIVE) | |
1030 | return 0; | |
1031 | ||
1032 | if (bp->flags & SX_BOARD_IS_PCI) | |
1033 | error = request_irq(bp->irq, sx_interrupt, SA_INTERRUPT | SA_SHIRQ, "specialix IO8+", bp); | |
1034 | else | |
1035 | error = request_irq(bp->irq, sx_interrupt, SA_INTERRUPT, "specialix IO8+", bp); | |
1036 | ||
1037 | if (error) | |
1038 | return error; | |
1039 | ||
1040 | turn_ints_on (bp); | |
1041 | bp->flags |= SX_BOARD_ACTIVE; | |
1042 | ||
1043 | return 0; | |
1044 | } | |
1045 | ||
1046 | ||
1047 | /* Called with disabled interrupts */ | |
1048 | static inline void sx_shutdown_board(struct specialix_board *bp) | |
1049 | { | |
1050 | func_enter(); | |
1051 | ||
1052 | if (!(bp->flags & SX_BOARD_ACTIVE)) { | |
1053 | func_exit(); | |
1054 | return; | |
1055 | } | |
1056 | ||
1057 | bp->flags &= ~SX_BOARD_ACTIVE; | |
1058 | ||
1059 | dprintk (SX_DEBUG_IRQ, "Freeing IRQ%d for board %d.\n", | |
1060 | bp->irq, board_No (bp)); | |
1061 | free_irq(bp->irq, bp); | |
1062 | ||
1063 | turn_ints_off (bp); | |
1064 | ||
1065 | ||
1066 | func_exit(); | |
1067 | } | |
1068 | ||
1069 | ||
1070 | /* | |
1071 | * Setting up port characteristics. | |
1072 | * Must be called with disabled interrupts | |
1073 | */ | |
1074 | static void sx_change_speed(struct specialix_board *bp, struct specialix_port *port) | |
1075 | { | |
1076 | struct tty_struct *tty; | |
1077 | unsigned long baud; | |
1078 | long tmp; | |
1079 | unsigned char cor1 = 0, cor3 = 0; | |
1080 | unsigned char mcor1 = 0, mcor2 = 0; | |
1081 | static unsigned long again; | |
1082 | unsigned long flags; | |
1083 | ||
1084 | func_enter(); | |
1085 | ||
1086 | if (!(tty = port->tty) || !tty->termios) { | |
1087 | func_exit(); | |
1088 | return; | |
1089 | } | |
1090 | ||
1091 | port->IER = 0; | |
1092 | port->COR2 = 0; | |
1093 | /* Select port on the board */ | |
1094 | spin_lock_irqsave(&bp->lock, flags); | |
1095 | sx_out(bp, CD186x_CAR, port_No(port)); | |
1096 | ||
1097 | /* The Specialix board doens't implement the RTS lines. | |
1098 | They are used to set the IRQ level. Don't touch them. */ | |
1099 | if (SX_CRTSCTS(tty)) | |
1100 | port->MSVR = MSVR_DTR | (sx_in(bp, CD186x_MSVR) & MSVR_RTS); | |
1101 | else | |
1102 | port->MSVR = (sx_in(bp, CD186x_MSVR) & MSVR_RTS); | |
1103 | spin_unlock_irqrestore(&bp->lock, flags); | |
1104 | dprintk (SX_DEBUG_TERMIOS, "sx: got MSVR=%02x.\n", port->MSVR); | |
1105 | baud = C_BAUD(tty); | |
1106 | ||
1107 | if (baud & CBAUDEX) { | |
1108 | baud &= ~CBAUDEX; | |
1109 | if (baud < 1 || baud > 2) | |
1110 | port->tty->termios->c_cflag &= ~CBAUDEX; | |
1111 | else | |
1112 | baud += 15; | |
1113 | } | |
1114 | if (baud == 15) { | |
1115 | if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) | |
1116 | baud ++; | |
1117 | if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) | |
1118 | baud += 2; | |
1119 | } | |
1120 | ||
1121 | ||
1122 | if (!baud_table[baud]) { | |
1123 | /* Drop DTR & exit */ | |
1124 | dprintk (SX_DEBUG_TERMIOS, "Dropping DTR... Hmm....\n"); | |
1125 | if (!SX_CRTSCTS (tty)) { | |
1126 | port -> MSVR &= ~ MSVR_DTR; | |
1127 | spin_lock_irqsave(&bp->lock, flags); | |
1128 | sx_out(bp, CD186x_MSVR, port->MSVR ); | |
1129 | spin_unlock_irqrestore(&bp->lock, flags); | |
1130 | } | |
1131 | else | |
1132 | dprintk (SX_DEBUG_TERMIOS, "Can't drop DTR: no DTR.\n"); | |
1133 | return; | |
1134 | } else { | |
1135 | /* Set DTR on */ | |
1136 | if (!SX_CRTSCTS (tty)) { | |
1137 | port ->MSVR |= MSVR_DTR; | |
1138 | } | |
1139 | } | |
1140 | ||
1141 | /* | |
1142 | * Now we must calculate some speed depended things | |
1143 | */ | |
1144 | ||
1145 | /* Set baud rate for port */ | |
1146 | tmp = port->custom_divisor ; | |
1147 | if ( tmp ) | |
1148 | printk (KERN_INFO "sx%d: Using custom baud rate divisor %ld. \n" | |
1149 | "This is an untested option, please be carefull.\n", | |
1150 | port_No (port), tmp); | |
1151 | else | |
1152 | tmp = (((SX_OSCFREQ + baud_table[baud]/2) / baud_table[baud] + | |
1153 | CD186x_TPC/2) / CD186x_TPC); | |
1154 | ||
1155 | if ((tmp < 0x10) && time_before(again, jiffies)) { | |
1156 | again = jiffies + HZ * 60; | |
1157 | /* Page 48 of version 2.0 of the CL-CD1865 databook */ | |
1158 | if (tmp >= 12) { | |
1159 | printk (KERN_INFO "sx%d: Baud rate divisor is %ld. \n" | |
1160 | "Performance degradation is possible.\n" | |
1161 | "Read specialix.txt for more info.\n", | |
1162 | port_No (port), tmp); | |
1163 | } else { | |
1164 | printk (KERN_INFO "sx%d: Baud rate divisor is %ld. \n" | |
1165 | "Warning: overstressing Cirrus chip. " | |
1166 | "This might not work.\n" | |
1167 | "Read specialix.txt for more info.\n", | |
1168 | port_No (port), tmp); | |
1169 | } | |
1170 | } | |
1171 | spin_lock_irqsave(&bp->lock, flags); | |
1172 | sx_out(bp, CD186x_RBPRH, (tmp >> 8) & 0xff); | |
1173 | sx_out(bp, CD186x_TBPRH, (tmp >> 8) & 0xff); | |
1174 | sx_out(bp, CD186x_RBPRL, tmp & 0xff); | |
1175 | sx_out(bp, CD186x_TBPRL, tmp & 0xff); | |
1176 | spin_unlock_irqrestore(&bp->lock, flags); | |
1177 | if (port->custom_divisor) { | |
1178 | baud = (SX_OSCFREQ + port->custom_divisor/2) / port->custom_divisor; | |
1179 | baud = ( baud + 5 ) / 10; | |
1180 | } else | |
1181 | baud = (baud_table[baud] + 5) / 10; /* Estimated CPS */ | |
1182 | ||
1183 | /* Two timer ticks seems enough to wakeup something like SLIP driver */ | |
1184 | tmp = ((baud + HZ/2) / HZ) * 2 - CD186x_NFIFO; | |
1185 | port->wakeup_chars = (tmp < 0) ? 0 : ((tmp >= SERIAL_XMIT_SIZE) ? | |
1186 | SERIAL_XMIT_SIZE - 1 : tmp); | |
1187 | ||
1188 | /* Receiver timeout will be transmission time for 1.5 chars */ | |
1189 | tmp = (SPECIALIX_TPS + SPECIALIX_TPS/2 + baud/2) / baud; | |
1190 | tmp = (tmp > 0xff) ? 0xff : tmp; | |
1191 | spin_lock_irqsave(&bp->lock, flags); | |
1192 | sx_out(bp, CD186x_RTPR, tmp); | |
1193 | spin_unlock_irqrestore(&bp->lock, flags); | |
1194 | switch (C_CSIZE(tty)) { | |
1195 | case CS5: | |
1196 | cor1 |= COR1_5BITS; | |
1197 | break; | |
1198 | case CS6: | |
1199 | cor1 |= COR1_6BITS; | |
1200 | break; | |
1201 | case CS7: | |
1202 | cor1 |= COR1_7BITS; | |
1203 | break; | |
1204 | case CS8: | |
1205 | cor1 |= COR1_8BITS; | |
1206 | break; | |
1207 | } | |
1208 | ||
1209 | if (C_CSTOPB(tty)) | |
1210 | cor1 |= COR1_2SB; | |
1211 | ||
1212 | cor1 |= COR1_IGNORE; | |
1213 | if (C_PARENB(tty)) { | |
1214 | cor1 |= COR1_NORMPAR; | |
1215 | if (C_PARODD(tty)) | |
1216 | cor1 |= COR1_ODDP; | |
1217 | if (I_INPCK(tty)) | |
1218 | cor1 &= ~COR1_IGNORE; | |
1219 | } | |
1220 | /* Set marking of some errors */ | |
1221 | port->mark_mask = RCSR_OE | RCSR_TOUT; | |
1222 | if (I_INPCK(tty)) | |
1223 | port->mark_mask |= RCSR_FE | RCSR_PE; | |
1224 | if (I_BRKINT(tty) || I_PARMRK(tty)) | |
1225 | port->mark_mask |= RCSR_BREAK; | |
1226 | if (I_IGNPAR(tty)) | |
1227 | port->mark_mask &= ~(RCSR_FE | RCSR_PE); | |
1228 | if (I_IGNBRK(tty)) { | |
1229 | port->mark_mask &= ~RCSR_BREAK; | |
1230 | if (I_IGNPAR(tty)) | |
1231 | /* Real raw mode. Ignore all */ | |
1232 | port->mark_mask &= ~RCSR_OE; | |
1233 | } | |
1234 | /* Enable Hardware Flow Control */ | |
1235 | if (C_CRTSCTS(tty)) { | |
1236 | #ifdef SPECIALIX_BRAIN_DAMAGED_CTS | |
1237 | port->IER |= IER_DSR | IER_CTS; | |
1238 | mcor1 |= MCOR1_DSRZD | MCOR1_CTSZD; | |
1239 | mcor2 |= MCOR2_DSROD | MCOR2_CTSOD; | |
1240 | spin_lock_irqsave(&bp->lock, flags); | |
1241 | tty->hw_stopped = !(sx_in(bp, CD186x_MSVR) & (MSVR_CTS|MSVR_DSR)); | |
1242 | spin_unlock_irqrestore(&bp->lock, flags); | |
1243 | #else | |
1244 | port->COR2 |= COR2_CTSAE; | |
1245 | #endif | |
1246 | } | |
1247 | /* Enable Software Flow Control. FIXME: I'm not sure about this */ | |
1248 | /* Some people reported that it works, but I still doubt it */ | |
1249 | if (I_IXON(tty)) { | |
1250 | port->COR2 |= COR2_TXIBE; | |
1251 | cor3 |= (COR3_FCT | COR3_SCDE); | |
1252 | if (I_IXANY(tty)) | |
1253 | port->COR2 |= COR2_IXM; | |
1254 | spin_lock_irqsave(&bp->lock, flags); | |
1255 | sx_out(bp, CD186x_SCHR1, START_CHAR(tty)); | |
1256 | sx_out(bp, CD186x_SCHR2, STOP_CHAR(tty)); | |
1257 | sx_out(bp, CD186x_SCHR3, START_CHAR(tty)); | |
1258 | sx_out(bp, CD186x_SCHR4, STOP_CHAR(tty)); | |
1259 | spin_unlock_irqrestore(&bp->lock, flags); | |
1260 | } | |
1261 | if (!C_CLOCAL(tty)) { | |
1262 | /* Enable CD check */ | |
1263 | port->IER |= IER_CD; | |
1264 | mcor1 |= MCOR1_CDZD; | |
1265 | mcor2 |= MCOR2_CDOD; | |
1266 | } | |
1267 | ||
1268 | if (C_CREAD(tty)) | |
1269 | /* Enable receiver */ | |
1270 | port->IER |= IER_RXD; | |
1271 | ||
1272 | /* Set input FIFO size (1-8 bytes) */ | |
1273 | cor3 |= sx_rxfifo; | |
1274 | /* Setting up CD186x channel registers */ | |
1275 | spin_lock_irqsave(&bp->lock, flags); | |
1276 | sx_out(bp, CD186x_COR1, cor1); | |
1277 | sx_out(bp, CD186x_COR2, port->COR2); | |
1278 | sx_out(bp, CD186x_COR3, cor3); | |
1279 | spin_unlock_irqrestore(&bp->lock, flags); | |
1280 | /* Make CD186x know about registers change */ | |
1281 | sx_wait_CCR(bp); | |
1282 | spin_lock_irqsave(&bp->lock, flags); | |
1283 | sx_out(bp, CD186x_CCR, CCR_CORCHG1 | CCR_CORCHG2 | CCR_CORCHG3); | |
1284 | /* Setting up modem option registers */ | |
1285 | dprintk (SX_DEBUG_TERMIOS, "Mcor1 = %02x, mcor2 = %02x.\n", mcor1, mcor2); | |
1286 | sx_out(bp, CD186x_MCOR1, mcor1); | |
1287 | sx_out(bp, CD186x_MCOR2, mcor2); | |
1288 | spin_unlock_irqrestore(&bp->lock, flags); | |
1289 | /* Enable CD186x transmitter & receiver */ | |
1290 | sx_wait_CCR(bp); | |
1291 | spin_lock_irqsave(&bp->lock, flags); | |
1292 | sx_out(bp, CD186x_CCR, CCR_TXEN | CCR_RXEN); | |
1293 | /* Enable interrupts */ | |
1294 | sx_out(bp, CD186x_IER, port->IER); | |
1295 | /* And finally set the modem lines... */ | |
1296 | sx_out(bp, CD186x_MSVR, port->MSVR); | |
1297 | spin_unlock_irqrestore(&bp->lock, flags); | |
1298 | ||
1299 | func_exit(); | |
1300 | } | |
1301 | ||
1302 | ||
1303 | /* Must be called with interrupts enabled */ | |
1304 | static int sx_setup_port(struct specialix_board *bp, struct specialix_port *port) | |
1305 | { | |
1306 | unsigned long flags; | |
1307 | ||
1308 | func_enter(); | |
1309 | ||
1310 | if (port->flags & ASYNC_INITIALIZED) { | |
1311 | func_exit(); | |
1312 | return 0; | |
1313 | } | |
1314 | ||
1315 | if (!port->xmit_buf) { | |
1316 | /* We may sleep in get_zeroed_page() */ | |
1317 | unsigned long tmp; | |
1318 | ||
1319 | if (!(tmp = get_zeroed_page(GFP_KERNEL))) { | |
1320 | func_exit(); | |
1321 | return -ENOMEM; | |
1322 | } | |
1323 | ||
1324 | if (port->xmit_buf) { | |
1325 | free_page(tmp); | |
1326 | func_exit(); | |
1327 | return -ERESTARTSYS; | |
1328 | } | |
1329 | port->xmit_buf = (unsigned char *) tmp; | |
1330 | } | |
1331 | ||
1332 | spin_lock_irqsave(&port->lock, flags); | |
1333 | ||
1334 | if (port->tty) | |
1335 | clear_bit(TTY_IO_ERROR, &port->tty->flags); | |
1336 | ||
1337 | port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; | |
1338 | sx_change_speed(bp, port); | |
1339 | port->flags |= ASYNC_INITIALIZED; | |
1340 | ||
1341 | spin_unlock_irqrestore(&port->lock, flags); | |
1342 | ||
1343 | ||
1344 | func_exit(); | |
1345 | return 0; | |
1346 | } | |
1347 | ||
1348 | ||
1349 | /* Must be called with interrupts disabled */ | |
1350 | static void sx_shutdown_port(struct specialix_board *bp, struct specialix_port *port) | |
1351 | { | |
1352 | struct tty_struct *tty; | |
1353 | int i; | |
1354 | unsigned long flags; | |
1355 | ||
1356 | func_enter(); | |
1357 | ||
1358 | if (!(port->flags & ASYNC_INITIALIZED)) { | |
1359 | func_exit(); | |
1360 | return; | |
1361 | } | |
1362 | ||
1363 | if (sx_debug & SX_DEBUG_FIFO) { | |
1364 | dprintk(SX_DEBUG_FIFO, "sx%d: port %d: %ld overruns, FIFO hits [ ", | |
1365 | board_No(bp), port_No(port), port->overrun); | |
1366 | for (i = 0; i < 10; i++) { | |
1367 | dprintk(SX_DEBUG_FIFO, "%ld ", port->hits[i]); | |
1368 | } | |
1369 | dprintk(SX_DEBUG_FIFO, "].\n"); | |
1370 | } | |
1371 | ||
1372 | if (port->xmit_buf) { | |
1373 | free_page((unsigned long) port->xmit_buf); | |
1374 | port->xmit_buf = NULL; | |
1375 | } | |
1376 | ||
1377 | /* Select port */ | |
1378 | spin_lock_irqsave(&bp->lock, flags); | |
1379 | sx_out(bp, CD186x_CAR, port_No(port)); | |
1380 | ||
1381 | if (!(tty = port->tty) || C_HUPCL(tty)) { | |
1382 | /* Drop DTR */ | |
1383 | sx_out(bp, CD186x_MSVDTR, 0); | |
1384 | } | |
1385 | spin_unlock_irqrestore(&bp->lock, flags); | |
1386 | /* Reset port */ | |
1387 | sx_wait_CCR(bp); | |
1388 | spin_lock_irqsave(&bp->lock, flags); | |
1389 | sx_out(bp, CD186x_CCR, CCR_SOFTRESET); | |
1390 | /* Disable all interrupts from this port */ | |
1391 | port->IER = 0; | |
1392 | sx_out(bp, CD186x_IER, port->IER); | |
1393 | spin_unlock_irqrestore(&bp->lock, flags); | |
1394 | if (tty) | |
1395 | set_bit(TTY_IO_ERROR, &tty->flags); | |
1396 | port->flags &= ~ASYNC_INITIALIZED; | |
1397 | ||
1398 | if (!bp->count) | |
1399 | sx_shutdown_board(bp); | |
1400 | func_exit(); | |
1401 | } | |
1402 | ||
1403 | ||
1404 | static int block_til_ready(struct tty_struct *tty, struct file * filp, | |
1405 | struct specialix_port *port) | |
1406 | { | |
1407 | DECLARE_WAITQUEUE(wait, current); | |
1408 | struct specialix_board *bp = port_Board(port); | |
1409 | int retval; | |
1410 | int do_clocal = 0; | |
1411 | int CD; | |
1412 | unsigned long flags; | |
1413 | ||
1414 | func_enter(); | |
1415 | ||
1416 | /* | |
1417 | * If the device is in the middle of being closed, then block | |
1418 | * until it's done, and then try again. | |
1419 | */ | |
1420 | if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING) { | |
1421 | interruptible_sleep_on(&port->close_wait); | |
1422 | if (port->flags & ASYNC_HUP_NOTIFY) { | |
1423 | func_exit(); | |
1424 | return -EAGAIN; | |
1425 | } else { | |
1426 | func_exit(); | |
1427 | return -ERESTARTSYS; | |
1428 | } | |
1429 | } | |
1430 | ||
1431 | /* | |
1432 | * If non-blocking mode is set, or the port is not enabled, | |
1433 | * then make the check up front and then exit. | |
1434 | */ | |
1435 | if ((filp->f_flags & O_NONBLOCK) || | |
1436 | (tty->flags & (1 << TTY_IO_ERROR))) { | |
1437 | port->flags |= ASYNC_NORMAL_ACTIVE; | |
1438 | func_exit(); | |
1439 | return 0; | |
1440 | } | |
1441 | ||
1442 | if (C_CLOCAL(tty)) | |
1443 | do_clocal = 1; | |
1444 | ||
1445 | /* | |
1446 | * Block waiting for the carrier detect and the line to become | |
1447 | * free (i.e., not in use by the callout). While we are in | |
1448 | * this loop, info->count is dropped by one, so that | |
1449 | * rs_close() knows when to free things. We restore it upon | |
1450 | * exit, either normal or abnormal. | |
1451 | */ | |
1452 | retval = 0; | |
1453 | add_wait_queue(&port->open_wait, &wait); | |
1454 | spin_lock_irqsave(&port->lock, flags); | |
1455 | if (!tty_hung_up_p(filp)) { | |
1456 | port->count--; | |
1457 | } | |
1458 | spin_unlock_irqrestore(&port->lock, flags); | |
1459 | port->blocked_open++; | |
1460 | while (1) { | |
1461 | spin_lock_irqsave(&bp->lock, flags); | |
1462 | sx_out(bp, CD186x_CAR, port_No(port)); | |
1463 | CD = sx_in(bp, CD186x_MSVR) & MSVR_CD; | |
1464 | if (SX_CRTSCTS (tty)) { | |
1465 | /* Activate RTS */ | |
1466 | port->MSVR |= MSVR_DTR; /* WTF? */ | |
1467 | sx_out (bp, CD186x_MSVR, port->MSVR); | |
1468 | } else { | |
1469 | /* Activate DTR */ | |
1470 | port->MSVR |= MSVR_DTR; | |
1471 | sx_out (bp, CD186x_MSVR, port->MSVR); | |
1472 | } | |
1473 | spin_unlock_irqrestore(&bp->lock, flags); | |
1474 | set_current_state(TASK_INTERRUPTIBLE); | |
1475 | if (tty_hung_up_p(filp) || | |
1476 | !(port->flags & ASYNC_INITIALIZED)) { | |
1477 | if (port->flags & ASYNC_HUP_NOTIFY) | |
1478 | retval = -EAGAIN; | |
1479 | else | |
1480 | retval = -ERESTARTSYS; | |
1481 | break; | |
1482 | } | |
1483 | if (!(port->flags & ASYNC_CLOSING) && | |
1484 | (do_clocal || CD)) | |
1485 | break; | |
1486 | if (signal_pending(current)) { | |
1487 | retval = -ERESTARTSYS; | |
1488 | break; | |
1489 | } | |
1490 | schedule(); | |
1491 | } | |
1492 | ||
1493 | set_current_state(TASK_RUNNING); | |
1494 | remove_wait_queue(&port->open_wait, &wait); | |
1495 | spin_lock_irqsave(&port->lock, flags); | |
1496 | if (!tty_hung_up_p(filp)) { | |
1497 | port->count++; | |
1498 | } | |
1499 | port->blocked_open--; | |
1500 | spin_unlock_irqrestore(&port->lock, flags); | |
1501 | if (retval) { | |
1502 | func_exit(); | |
1503 | return retval; | |
1504 | } | |
1505 | ||
1506 | port->flags |= ASYNC_NORMAL_ACTIVE; | |
1507 | func_exit(); | |
1508 | return 0; | |
1509 | } | |
1510 | ||
1511 | ||
1512 | static int sx_open(struct tty_struct * tty, struct file * filp) | |
1513 | { | |
1514 | int board; | |
1515 | int error; | |
1516 | struct specialix_port * port; | |
1517 | struct specialix_board * bp; | |
1518 | int i; | |
1519 | unsigned long flags; | |
1520 | ||
1521 | func_enter(); | |
1522 | ||
1523 | board = SX_BOARD(tty->index); | |
1524 | ||
1525 | if (board >= SX_NBOARD || !(sx_board[board].flags & SX_BOARD_PRESENT)) { | |
1526 | func_exit(); | |
1527 | return -ENODEV; | |
1528 | } | |
1529 | ||
1530 | bp = &sx_board[board]; | |
1531 | port = sx_port + board * SX_NPORT + SX_PORT(tty->index); | |
1532 | port->overrun = 0; | |
1533 | for (i = 0; i < 10; i++) | |
1534 | port->hits[i]=0; | |
1535 | ||
1536 | dprintk (SX_DEBUG_OPEN, "Board = %d, bp = %p, port = %p, portno = %d.\n", | |
1537 | board, bp, port, SX_PORT(tty->index)); | |
1538 | ||
1539 | if (sx_paranoia_check(port, tty->name, "sx_open")) { | |
1540 | func_enter(); | |
1541 | return -ENODEV; | |
1542 | } | |
1543 | ||
1544 | if ((error = sx_setup_board(bp))) { | |
1545 | func_exit(); | |
1546 | return error; | |
1547 | } | |
1548 | ||
1549 | spin_lock_irqsave(&bp->lock, flags); | |
1550 | port->count++; | |
1551 | bp->count++; | |
1552 | tty->driver_data = port; | |
1553 | port->tty = tty; | |
1554 | spin_unlock_irqrestore(&bp->lock, flags); | |
1555 | ||
1556 | if ((error = sx_setup_port(bp, port))) { | |
1557 | func_enter(); | |
1558 | return error; | |
1559 | } | |
1560 | ||
1561 | if ((error = block_til_ready(tty, filp, port))) { | |
1562 | func_enter(); | |
1563 | return error; | |
1564 | } | |
1565 | ||
1566 | func_exit(); | |
1567 | return 0; | |
1568 | } | |
1569 | ||
1570 | ||
1571 | static void sx_close(struct tty_struct * tty, struct file * filp) | |
1572 | { | |
1573 | struct specialix_port *port = (struct specialix_port *) tty->driver_data; | |
1574 | struct specialix_board *bp; | |
1575 | unsigned long flags; | |
1576 | unsigned long timeout; | |
1577 | ||
1578 | func_enter(); | |
1579 | if (!port || sx_paranoia_check(port, tty->name, "close")) { | |
1580 | func_exit(); | |
1581 | return; | |
1582 | } | |
1583 | spin_lock_irqsave(&port->lock, flags); | |
1584 | ||
1585 | if (tty_hung_up_p(filp)) { | |
1586 | spin_unlock_irqrestore(&port->lock, flags); | |
1587 | func_exit(); | |
1588 | return; | |
1589 | } | |
1590 | ||
1591 | bp = port_Board(port); | |
1592 | if ((tty->count == 1) && (port->count != 1)) { | |
1593 | printk(KERN_ERR "sx%d: sx_close: bad port count;" | |
1594 | " tty->count is 1, port count is %d\n", | |
1595 | board_No(bp), port->count); | |
1596 | port->count = 1; | |
1597 | } | |
1598 | ||
1599 | if (port->count > 1) { | |
1600 | port->count--; | |
1601 | bp->count--; | |
1602 | ||
1603 | spin_unlock_irqrestore(&port->lock, flags); | |
1604 | ||
1605 | func_exit(); | |
1606 | return; | |
1607 | } | |
1608 | port->flags |= ASYNC_CLOSING; | |
1609 | /* | |
1610 | * Now we wait for the transmit buffer to clear; and we notify | |
1611 | * the line discipline to only process XON/XOFF characters. | |
1612 | */ | |
1613 | tty->closing = 1; | |
1614 | spin_unlock_irqrestore(&port->lock, flags); | |
1615 | dprintk (SX_DEBUG_OPEN, "Closing\n"); | |
1616 | if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE) { | |
1617 | tty_wait_until_sent(tty, port->closing_wait); | |
1618 | } | |
1619 | /* | |
1620 | * At this point we stop accepting input. To do this, we | |
1621 | * disable the receive line status interrupts, and tell the | |
1622 | * interrupt driver to stop checking the data ready bit in the | |
1623 | * line status register. | |
1624 | */ | |
1625 | dprintk (SX_DEBUG_OPEN, "Closed\n"); | |
1626 | port->IER &= ~IER_RXD; | |
1627 | if (port->flags & ASYNC_INITIALIZED) { | |
1628 | port->IER &= ~IER_TXRDY; | |
1629 | port->IER |= IER_TXEMPTY; | |
1630 | spin_lock_irqsave(&bp->lock, flags); | |
1631 | sx_out(bp, CD186x_CAR, port_No(port)); | |
1632 | sx_out(bp, CD186x_IER, port->IER); | |
1633 | spin_unlock_irqrestore(&bp->lock, flags); | |
1634 | /* | |
1635 | * Before we drop DTR, make sure the UART transmitter | |
1636 | * has completely drained; this is especially | |
1637 | * important if there is a transmit FIFO! | |
1638 | */ | |
1639 | timeout = jiffies+HZ; | |
1640 | while(port->IER & IER_TXEMPTY) { | |
1641 | set_current_state (TASK_INTERRUPTIBLE); | |
1642 | msleep_interruptible(jiffies_to_msecs(port->timeout)); | |
1643 | if (time_after(jiffies, timeout)) { | |
1644 | printk (KERN_INFO "Timeout waiting for close\n"); | |
1645 | break; | |
1646 | } | |
1647 | } | |
1648 | ||
1649 | } | |
1650 | ||
1651 | if (--bp->count < 0) { | |
1652 | printk(KERN_ERR "sx%d: sx_shutdown_port: bad board count: %d port: %d\n", | |
1653 | board_No(bp), bp->count, tty->index); | |
1654 | bp->count = 0; | |
1655 | } | |
1656 | if (--port->count < 0) { | |
1657 | printk(KERN_ERR "sx%d: sx_close: bad port count for tty%d: %d\n", | |
1658 | board_No(bp), port_No(port), port->count); | |
1659 | port->count = 0; | |
1660 | } | |
1661 | ||
1662 | sx_shutdown_port(bp, port); | |
1663 | if (tty->driver->flush_buffer) | |
1664 | tty->driver->flush_buffer(tty); | |
1665 | tty_ldisc_flush(tty); | |
1666 | spin_lock_irqsave(&port->lock, flags); | |
1667 | tty->closing = 0; | |
1668 | port->event = 0; | |
1669 | port->tty = NULL; | |
1670 | spin_unlock_irqrestore(&port->lock, flags); | |
1671 | if (port->blocked_open) { | |
1672 | if (port->close_delay) { | |
1673 | msleep_interruptible(jiffies_to_msecs(port->close_delay)); | |
1674 | } | |
1675 | wake_up_interruptible(&port->open_wait); | |
1676 | } | |
1677 | port->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING); | |
1678 | wake_up_interruptible(&port->close_wait); | |
1679 | ||
1680 | func_exit(); | |
1681 | } | |
1682 | ||
1683 | ||
1684 | static int sx_write(struct tty_struct * tty, | |
1685 | const unsigned char *buf, int count) | |
1686 | { | |
1687 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; | |
1688 | struct specialix_board *bp; | |
1689 | int c, total = 0; | |
1690 | unsigned long flags; | |
1691 | ||
1692 | func_enter(); | |
1693 | if (sx_paranoia_check(port, tty->name, "sx_write")) { | |
1694 | func_exit(); | |
1695 | return 0; | |
1696 | } | |
1697 | ||
1698 | bp = port_Board(port); | |
1699 | ||
1700 | if (!tty || !port->xmit_buf || !tmp_buf) { | |
1701 | func_exit(); | |
1702 | return 0; | |
1703 | } | |
1704 | ||
1705 | while (1) { | |
1706 | spin_lock_irqsave(&port->lock, flags); | |
1707 | c = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt - 1, | |
1708 | SERIAL_XMIT_SIZE - port->xmit_head)); | |
1709 | if (c <= 0) { | |
1710 | spin_unlock_irqrestore(&port->lock, flags); | |
1711 | break; | |
1712 | } | |
1713 | memcpy(port->xmit_buf + port->xmit_head, buf, c); | |
1714 | port->xmit_head = (port->xmit_head + c) & (SERIAL_XMIT_SIZE-1); | |
1715 | port->xmit_cnt += c; | |
1716 | spin_unlock_irqrestore(&port->lock, flags); | |
1717 | ||
1718 | buf += c; | |
1719 | count -= c; | |
1720 | total += c; | |
1721 | } | |
1722 | ||
1723 | spin_lock_irqsave(&bp->lock, flags); | |
1724 | if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped && | |
1725 | !(port->IER & IER_TXRDY)) { | |
1726 | port->IER |= IER_TXRDY; | |
1727 | sx_out(bp, CD186x_CAR, port_No(port)); | |
1728 | sx_out(bp, CD186x_IER, port->IER); | |
1729 | } | |
1730 | spin_unlock_irqrestore(&bp->lock, flags); | |
1731 | func_exit(); | |
1732 | ||
1733 | return total; | |
1734 | } | |
1735 | ||
1736 | ||
1737 | static void sx_put_char(struct tty_struct * tty, unsigned char ch) | |
1738 | { | |
1739 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; | |
1740 | unsigned long flags; | |
1741 | struct specialix_board * bp; | |
1742 | ||
1743 | func_enter(); | |
1744 | ||
1745 | if (sx_paranoia_check(port, tty->name, "sx_put_char")) { | |
1746 | func_exit(); | |
1747 | return; | |
1748 | } | |
1749 | dprintk (SX_DEBUG_TX, "check tty: %p %p\n", tty, port->xmit_buf); | |
1750 | if (!tty || !port->xmit_buf) { | |
1751 | func_exit(); | |
1752 | return; | |
1753 | } | |
1754 | bp = port_Board(port); | |
1755 | spin_lock_irqsave(&port->lock, flags); | |
1756 | ||
1757 | dprintk (SX_DEBUG_TX, "xmit_cnt: %d xmit_buf: %p\n", port->xmit_cnt, port->xmit_buf); | |
1758 | if ((port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) || (!port->xmit_buf)) { | |
1759 | spin_unlock_irqrestore(&port->lock, flags); | |
1760 | dprintk (SX_DEBUG_TX, "Exit size\n"); | |
1761 | func_exit(); | |
1762 | return; | |
1763 | } | |
1764 | dprintk (SX_DEBUG_TX, "Handle xmit: %p %p\n", port, port->xmit_buf); | |
1765 | port->xmit_buf[port->xmit_head++] = ch; | |
1766 | port->xmit_head &= SERIAL_XMIT_SIZE - 1; | |
1767 | port->xmit_cnt++; | |
1768 | spin_unlock_irqrestore(&port->lock, flags); | |
1769 | ||
1770 | func_exit(); | |
1771 | } | |
1772 | ||
1773 | ||
1774 | static void sx_flush_chars(struct tty_struct * tty) | |
1775 | { | |
1776 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; | |
1777 | unsigned long flags; | |
1778 | struct specialix_board * bp = port_Board(port); | |
1779 | ||
1780 | func_enter(); | |
1781 | ||
1782 | if (sx_paranoia_check(port, tty->name, "sx_flush_chars")) { | |
1783 | func_exit(); | |
1784 | return; | |
1785 | } | |
1786 | if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped || | |
1787 | !port->xmit_buf) { | |
1788 | func_exit(); | |
1789 | return; | |
1790 | } | |
1791 | spin_lock_irqsave(&bp->lock, flags); | |
1792 | port->IER |= IER_TXRDY; | |
1793 | sx_out(port_Board(port), CD186x_CAR, port_No(port)); | |
1794 | sx_out(port_Board(port), CD186x_IER, port->IER); | |
1795 | spin_unlock_irqrestore(&bp->lock, flags); | |
1796 | ||
1797 | func_exit(); | |
1798 | } | |
1799 | ||
1800 | ||
1801 | static int sx_write_room(struct tty_struct * tty) | |
1802 | { | |
1803 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; | |
1804 | int ret; | |
1805 | ||
1806 | func_enter(); | |
1807 | ||
1808 | if (sx_paranoia_check(port, tty->name, "sx_write_room")) { | |
1809 | func_exit(); | |
1810 | return 0; | |
1811 | } | |
1812 | ||
1813 | ret = SERIAL_XMIT_SIZE - port->xmit_cnt - 1; | |
1814 | if (ret < 0) | |
1815 | ret = 0; | |
1816 | ||
1817 | func_exit(); | |
1818 | return ret; | |
1819 | } | |
1820 | ||
1821 | ||
1822 | static int sx_chars_in_buffer(struct tty_struct *tty) | |
1823 | { | |
1824 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; | |
1825 | ||
1826 | func_enter(); | |
1827 | ||
1828 | if (sx_paranoia_check(port, tty->name, "sx_chars_in_buffer")) { | |
1829 | func_exit(); | |
1830 | return 0; | |
1831 | } | |
1832 | func_exit(); | |
1833 | return port->xmit_cnt; | |
1834 | } | |
1835 | ||
1836 | ||
1837 | static void sx_flush_buffer(struct tty_struct *tty) | |
1838 | { | |
1839 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; | |
1840 | unsigned long flags; | |
1841 | struct specialix_board * bp; | |
1842 | ||
1843 | func_enter(); | |
1844 | ||
1845 | if (sx_paranoia_check(port, tty->name, "sx_flush_buffer")) { | |
1846 | func_exit(); | |
1847 | return; | |
1848 | } | |
1849 | ||
1850 | bp = port_Board(port); | |
1851 | spin_lock_irqsave(&port->lock, flags); | |
1852 | port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; | |
1853 | spin_unlock_irqrestore(&port->lock, flags); | |
1854 | tty_wakeup(tty); | |
1855 | ||
1856 | func_exit(); | |
1857 | } | |
1858 | ||
1859 | ||
1860 | static int sx_tiocmget(struct tty_struct *tty, struct file *file) | |
1861 | { | |
1862 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; | |
1863 | struct specialix_board * bp; | |
1864 | unsigned char status; | |
1865 | unsigned int result; | |
1866 | unsigned long flags; | |
1867 | ||
1868 | func_enter(); | |
1869 | ||
1870 | if (sx_paranoia_check(port, tty->name, __FUNCTION__)) { | |
1871 | func_exit(); | |
1872 | return -ENODEV; | |
1873 | } | |
1874 | ||
1875 | bp = port_Board(port); | |
1876 | spin_lock_irqsave (&bp->lock, flags); | |
1877 | sx_out(bp, CD186x_CAR, port_No(port)); | |
1878 | status = sx_in(bp, CD186x_MSVR); | |
1879 | spin_unlock_irqrestore(&bp->lock, flags); | |
1880 | dprintk (SX_DEBUG_INIT, "Got msvr[%d] = %02x, car = %d.\n", | |
1881 | port_No(port), status, sx_in (bp, CD186x_CAR)); | |
1882 | dprintk (SX_DEBUG_INIT, "sx_port = %p, port = %p\n", sx_port, port); | |
1883 | if (SX_CRTSCTS(port->tty)) { | |
1884 | result = /* (status & MSVR_RTS) ? */ TIOCM_DTR /* : 0) */ | |
1885 | | ((status & MSVR_DTR) ? TIOCM_RTS : 0) | |
1886 | | ((status & MSVR_CD) ? TIOCM_CAR : 0) | |
1887 | |/* ((status & MSVR_DSR) ? */ TIOCM_DSR /* : 0) */ | |
1888 | | ((status & MSVR_CTS) ? TIOCM_CTS : 0); | |
1889 | } else { | |
1890 | result = /* (status & MSVR_RTS) ? */ TIOCM_RTS /* : 0) */ | |
1891 | | ((status & MSVR_DTR) ? TIOCM_DTR : 0) | |
1892 | | ((status & MSVR_CD) ? TIOCM_CAR : 0) | |
1893 | |/* ((status & MSVR_DSR) ? */ TIOCM_DSR /* : 0) */ | |
1894 | | ((status & MSVR_CTS) ? TIOCM_CTS : 0); | |
1895 | } | |
1896 | ||
1897 | func_exit(); | |
1898 | ||
1899 | return result; | |
1900 | } | |
1901 | ||
1902 | ||
1903 | static int sx_tiocmset(struct tty_struct *tty, struct file *file, | |
1904 | unsigned int set, unsigned int clear) | |
1905 | { | |
1906 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; | |
1907 | unsigned long flags; | |
1908 | struct specialix_board *bp; | |
1909 | ||
1910 | func_enter(); | |
1911 | ||
1912 | if (sx_paranoia_check(port, tty->name, __FUNCTION__)) { | |
1913 | func_exit(); | |
1914 | return -ENODEV; | |
1915 | } | |
1916 | ||
1917 | bp = port_Board(port); | |
1918 | ||
1919 | spin_lock_irqsave(&port->lock, flags); | |
1920 | /* if (set & TIOCM_RTS) | |
1921 | port->MSVR |= MSVR_RTS; */ | |
1922 | /* if (set & TIOCM_DTR) | |
1923 | port->MSVR |= MSVR_DTR; */ | |
1924 | ||
1925 | if (SX_CRTSCTS(port->tty)) { | |
1926 | if (set & TIOCM_RTS) | |
1927 | port->MSVR |= MSVR_DTR; | |
1928 | } else { | |
1929 | if (set & TIOCM_DTR) | |
1930 | port->MSVR |= MSVR_DTR; | |
1931 | } | |
1932 | ||
1933 | /* if (clear & TIOCM_RTS) | |
1934 | port->MSVR &= ~MSVR_RTS; */ | |
1935 | /* if (clear & TIOCM_DTR) | |
1936 | port->MSVR &= ~MSVR_DTR; */ | |
1937 | if (SX_CRTSCTS(port->tty)) { | |
1938 | if (clear & TIOCM_RTS) | |
1939 | port->MSVR &= ~MSVR_DTR; | |
1940 | } else { | |
1941 | if (clear & TIOCM_DTR) | |
1942 | port->MSVR &= ~MSVR_DTR; | |
1943 | } | |
1944 | spin_lock_irqsave(&bp->lock, flags); | |
1945 | sx_out(bp, CD186x_CAR, port_No(port)); | |
1946 | sx_out(bp, CD186x_MSVR, port->MSVR); | |
1947 | spin_unlock_irqrestore(&bp->lock, flags); | |
1948 | spin_unlock_irqrestore(&port->lock, flags); | |
1949 | func_exit(); | |
1950 | return 0; | |
1951 | } | |
1952 | ||
1953 | ||
1954 | static inline void sx_send_break(struct specialix_port * port, unsigned long length) | |
1955 | { | |
1956 | struct specialix_board *bp = port_Board(port); | |
1957 | unsigned long flags; | |
1958 | ||
1959 | func_enter(); | |
1960 | ||
1961 | spin_lock_irqsave (&port->lock, flags); | |
1962 | port->break_length = SPECIALIX_TPS / HZ * length; | |
1963 | port->COR2 |= COR2_ETC; | |
1964 | port->IER |= IER_TXRDY; | |
1965 | spin_lock_irqsave(&bp->lock, flags); | |
1966 | sx_out(bp, CD186x_CAR, port_No(port)); | |
1967 | sx_out(bp, CD186x_COR2, port->COR2); | |
1968 | sx_out(bp, CD186x_IER, port->IER); | |
1969 | spin_unlock_irqrestore(&bp->lock, flags); | |
1970 | spin_unlock_irqrestore (&port->lock, flags); | |
1971 | sx_wait_CCR(bp); | |
1972 | spin_lock_irqsave(&bp->lock, flags); | |
1973 | sx_out(bp, CD186x_CCR, CCR_CORCHG2); | |
1974 | spin_unlock_irqrestore(&bp->lock, flags); | |
1975 | sx_wait_CCR(bp); | |
1976 | ||
1977 | func_exit(); | |
1978 | } | |
1979 | ||
1980 | ||
1981 | static inline int sx_set_serial_info(struct specialix_port * port, | |
1982 | struct serial_struct __user * newinfo) | |
1983 | { | |
1984 | struct serial_struct tmp; | |
1985 | struct specialix_board *bp = port_Board(port); | |
1986 | int change_speed; | |
1987 | ||
1988 | func_enter(); | |
1989 | /* | |
e49332bd | 1990 | if (!access_ok(VERIFY_READ, (void *) newinfo, sizeof(tmp))) { |
1da177e4 | 1991 | func_exit(); |
e49332bd | 1992 | return -EFAULT; |
1da177e4 LT |
1993 | } |
1994 | */ | |
1995 | if (copy_from_user(&tmp, newinfo, sizeof(tmp))) { | |
1996 | func_enter(); | |
1997 | return -EFAULT; | |
1998 | } | |
1999 | ||
2000 | #if 0 | |
2001 | if ((tmp.irq != bp->irq) || | |
2002 | (tmp.port != bp->base) || | |
2003 | (tmp.type != PORT_CIRRUS) || | |
2004 | (tmp.baud_base != (SX_OSCFREQ + CD186x_TPC/2) / CD186x_TPC) || | |
2005 | (tmp.custom_divisor != 0) || | |
2006 | (tmp.xmit_fifo_size != CD186x_NFIFO) || | |
2007 | (tmp.flags & ~SPECIALIX_LEGAL_FLAGS)) { | |
2008 | func_exit(); | |
2009 | return -EINVAL; | |
2010 | } | |
2011 | #endif | |
2012 | ||
2013 | change_speed = ((port->flags & ASYNC_SPD_MASK) != | |
2014 | (tmp.flags & ASYNC_SPD_MASK)); | |
2015 | change_speed |= (tmp.custom_divisor != port->custom_divisor); | |
2016 | ||
2017 | if (!capable(CAP_SYS_ADMIN)) { | |
2018 | if ((tmp.close_delay != port->close_delay) || | |
2019 | (tmp.closing_wait != port->closing_wait) || | |
2020 | ((tmp.flags & ~ASYNC_USR_MASK) != | |
2021 | (port->flags & ~ASYNC_USR_MASK))) { | |
2022 | func_exit(); | |
2023 | return -EPERM; | |
2024 | } | |
2025 | port->flags = ((port->flags & ~ASYNC_USR_MASK) | | |
2026 | (tmp.flags & ASYNC_USR_MASK)); | |
2027 | port->custom_divisor = tmp.custom_divisor; | |
2028 | } else { | |
2029 | port->flags = ((port->flags & ~ASYNC_FLAGS) | | |
2030 | (tmp.flags & ASYNC_FLAGS)); | |
2031 | port->close_delay = tmp.close_delay; | |
2032 | port->closing_wait = tmp.closing_wait; | |
2033 | port->custom_divisor = tmp.custom_divisor; | |
2034 | } | |
2035 | if (change_speed) { | |
2036 | sx_change_speed(bp, port); | |
2037 | } | |
2038 | func_exit(); | |
2039 | return 0; | |
2040 | } | |
2041 | ||
2042 | ||
2043 | static inline int sx_get_serial_info(struct specialix_port * port, | |
2044 | struct serial_struct __user *retinfo) | |
2045 | { | |
2046 | struct serial_struct tmp; | |
2047 | struct specialix_board *bp = port_Board(port); | |
1da177e4 LT |
2048 | |
2049 | func_enter(); | |
2050 | ||
2051 | /* | |
e49332bd JJ |
2052 | if (!access_ok(VERIFY_WRITE, (void *) retinfo, sizeof(tmp))) |
2053 | return -EFAULT; | |
1da177e4 LT |
2054 | */ |
2055 | ||
2056 | memset(&tmp, 0, sizeof(tmp)); | |
2057 | tmp.type = PORT_CIRRUS; | |
2058 | tmp.line = port - sx_port; | |
2059 | tmp.port = bp->base; | |
2060 | tmp.irq = bp->irq; | |
2061 | tmp.flags = port->flags; | |
2062 | tmp.baud_base = (SX_OSCFREQ + CD186x_TPC/2) / CD186x_TPC; | |
2063 | tmp.close_delay = port->close_delay * HZ/100; | |
2064 | tmp.closing_wait = port->closing_wait * HZ/100; | |
2065 | tmp.custom_divisor = port->custom_divisor; | |
2066 | tmp.xmit_fifo_size = CD186x_NFIFO; | |
2067 | if (copy_to_user(retinfo, &tmp, sizeof(tmp))) { | |
2068 | func_exit(); | |
2069 | return -EFAULT; | |
2070 | } | |
2071 | ||
2072 | func_exit(); | |
2073 | return 0; | |
2074 | } | |
2075 | ||
2076 | ||
2077 | static int sx_ioctl(struct tty_struct * tty, struct file * filp, | |
2078 | unsigned int cmd, unsigned long arg) | |
2079 | { | |
2080 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; | |
2081 | int retval; | |
2082 | void __user *argp = (void __user *)arg; | |
2083 | ||
2084 | func_enter(); | |
2085 | ||
2086 | if (sx_paranoia_check(port, tty->name, "sx_ioctl")) { | |
2087 | func_exit(); | |
2088 | return -ENODEV; | |
2089 | } | |
2090 | ||
2091 | switch (cmd) { | |
2092 | case TCSBRK: /* SVID version: non-zero arg --> no break */ | |
2093 | retval = tty_check_change(tty); | |
2094 | if (retval) { | |
2095 | func_exit(); | |
2096 | return retval; | |
2097 | } | |
2098 | tty_wait_until_sent(tty, 0); | |
2099 | if (!arg) | |
2100 | sx_send_break(port, HZ/4); /* 1/4 second */ | |
2101 | return 0; | |
2102 | case TCSBRKP: /* support for POSIX tcsendbreak() */ | |
2103 | retval = tty_check_change(tty); | |
2104 | if (retval) { | |
2105 | func_exit(); | |
2106 | return retval; | |
2107 | } | |
2108 | tty_wait_until_sent(tty, 0); | |
2109 | sx_send_break(port, arg ? arg*(HZ/10) : HZ/4); | |
2110 | func_exit(); | |
2111 | return 0; | |
2112 | case TIOCGSOFTCAR: | |
2113 | if (put_user(C_CLOCAL(tty)?1:0, (unsigned long __user *)argp)) { | |
2114 | func_exit(); | |
2115 | return -EFAULT; | |
2116 | } | |
2117 | func_exit(); | |
2118 | return 0; | |
2119 | case TIOCSSOFTCAR: | |
2120 | if (get_user(arg, (unsigned long __user *) argp)) { | |
2121 | func_exit(); | |
2122 | return -EFAULT; | |
2123 | } | |
2124 | tty->termios->c_cflag = | |
2125 | ((tty->termios->c_cflag & ~CLOCAL) | | |
2126 | (arg ? CLOCAL : 0)); | |
2127 | func_exit(); | |
2128 | return 0; | |
2129 | case TIOCGSERIAL: | |
2130 | func_exit(); | |
2131 | return sx_get_serial_info(port, argp); | |
2132 | case TIOCSSERIAL: | |
2133 | func_exit(); | |
2134 | return sx_set_serial_info(port, argp); | |
2135 | default: | |
2136 | func_exit(); | |
2137 | return -ENOIOCTLCMD; | |
2138 | } | |
2139 | func_exit(); | |
2140 | return 0; | |
2141 | } | |
2142 | ||
2143 | ||
2144 | static void sx_throttle(struct tty_struct * tty) | |
2145 | { | |
2146 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; | |
2147 | struct specialix_board *bp; | |
2148 | unsigned long flags; | |
2149 | ||
2150 | func_enter(); | |
2151 | ||
2152 | if (sx_paranoia_check(port, tty->name, "sx_throttle")) { | |
2153 | func_exit(); | |
2154 | return; | |
2155 | } | |
2156 | ||
2157 | bp = port_Board(port); | |
2158 | ||
2159 | /* Use DTR instead of RTS ! */ | |
2160 | if (SX_CRTSCTS (tty)) | |
2161 | port->MSVR &= ~MSVR_DTR; | |
2162 | else { | |
2163 | /* Auch!!! I think the system shouldn't call this then. */ | |
2164 | /* Or maybe we're supposed (allowed?) to do our side of hw | |
2165 | handshake anyway, even when hardware handshake is off. | |
2166 | When you see this in your logs, please report.... */ | |
2167 | printk (KERN_ERR "sx%d: Need to throttle, but can't (hardware hs is off)\n", | |
2168 | port_No (port)); | |
2169 | } | |
2170 | spin_lock_irqsave(&bp->lock, flags); | |
2171 | sx_out(bp, CD186x_CAR, port_No(port)); | |
2172 | spin_unlock_irqrestore(&bp->lock, flags); | |
2173 | if (I_IXOFF(tty)) { | |
2174 | spin_unlock_irqrestore(&bp->lock, flags); | |
2175 | sx_wait_CCR(bp); | |
2176 | spin_lock_irqsave(&bp->lock, flags); | |
2177 | sx_out(bp, CD186x_CCR, CCR_SSCH2); | |
2178 | spin_unlock_irqrestore(&bp->lock, flags); | |
2179 | sx_wait_CCR(bp); | |
2180 | } | |
2181 | spin_lock_irqsave(&bp->lock, flags); | |
2182 | sx_out(bp, CD186x_MSVR, port->MSVR); | |
2183 | spin_unlock_irqrestore(&bp->lock, flags); | |
2184 | ||
2185 | func_exit(); | |
2186 | } | |
2187 | ||
2188 | ||
2189 | static void sx_unthrottle(struct tty_struct * tty) | |
2190 | { | |
2191 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; | |
2192 | struct specialix_board *bp; | |
2193 | unsigned long flags; | |
2194 | ||
2195 | func_enter(); | |
2196 | ||
2197 | if (sx_paranoia_check(port, tty->name, "sx_unthrottle")) { | |
2198 | func_exit(); | |
2199 | return; | |
2200 | } | |
2201 | ||
2202 | bp = port_Board(port); | |
2203 | ||
2204 | spin_lock_irqsave(&port->lock, flags); | |
2205 | /* XXXX Use DTR INSTEAD???? */ | |
2206 | if (SX_CRTSCTS(tty)) { | |
2207 | port->MSVR |= MSVR_DTR; | |
2208 | } /* Else clause: see remark in "sx_throttle"... */ | |
2209 | spin_lock_irqsave(&bp->lock, flags); | |
2210 | sx_out(bp, CD186x_CAR, port_No(port)); | |
2211 | spin_unlock_irqrestore(&bp->lock, flags); | |
2212 | if (I_IXOFF(tty)) { | |
2213 | spin_unlock_irqrestore(&port->lock, flags); | |
2214 | sx_wait_CCR(bp); | |
2215 | spin_lock_irqsave(&bp->lock, flags); | |
2216 | sx_out(bp, CD186x_CCR, CCR_SSCH1); | |
2217 | spin_unlock_irqrestore(&bp->lock, flags); | |
2218 | sx_wait_CCR(bp); | |
2219 | spin_lock_irqsave(&port->lock, flags); | |
2220 | } | |
2221 | spin_lock_irqsave(&bp->lock, flags); | |
2222 | sx_out(bp, CD186x_MSVR, port->MSVR); | |
2223 | spin_unlock_irqrestore(&bp->lock, flags); | |
2224 | spin_unlock_irqrestore(&port->lock, flags); | |
2225 | ||
2226 | func_exit(); | |
2227 | } | |
2228 | ||
2229 | ||
2230 | static void sx_stop(struct tty_struct * tty) | |
2231 | { | |
2232 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; | |
2233 | struct specialix_board *bp; | |
2234 | unsigned long flags; | |
2235 | ||
2236 | func_enter(); | |
2237 | ||
2238 | if (sx_paranoia_check(port, tty->name, "sx_stop")) { | |
2239 | func_exit(); | |
2240 | return; | |
2241 | } | |
2242 | ||
2243 | bp = port_Board(port); | |
2244 | ||
2245 | spin_lock_irqsave(&port->lock, flags); | |
2246 | port->IER &= ~IER_TXRDY; | |
2247 | spin_lock_irqsave(&bp->lock, flags); | |
2248 | sx_out(bp, CD186x_CAR, port_No(port)); | |
2249 | sx_out(bp, CD186x_IER, port->IER); | |
2250 | spin_unlock_irqrestore(&bp->lock, flags); | |
2251 | spin_unlock_irqrestore(&port->lock, flags); | |
2252 | ||
2253 | func_exit(); | |
2254 | } | |
2255 | ||
2256 | ||
2257 | static void sx_start(struct tty_struct * tty) | |
2258 | { | |
2259 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; | |
2260 | struct specialix_board *bp; | |
2261 | unsigned long flags; | |
2262 | ||
2263 | func_enter(); | |
2264 | ||
2265 | if (sx_paranoia_check(port, tty->name, "sx_start")) { | |
2266 | func_exit(); | |
2267 | return; | |
2268 | } | |
2269 | ||
2270 | bp = port_Board(port); | |
2271 | ||
2272 | spin_lock_irqsave(&port->lock, flags); | |
2273 | if (port->xmit_cnt && port->xmit_buf && !(port->IER & IER_TXRDY)) { | |
2274 | port->IER |= IER_TXRDY; | |
2275 | spin_lock_irqsave(&bp->lock, flags); | |
2276 | sx_out(bp, CD186x_CAR, port_No(port)); | |
2277 | sx_out(bp, CD186x_IER, port->IER); | |
2278 | spin_unlock_irqrestore(&bp->lock, flags); | |
2279 | } | |
2280 | spin_unlock_irqrestore(&port->lock, flags); | |
2281 | ||
2282 | func_exit(); | |
2283 | } | |
2284 | ||
2285 | ||
2286 | /* | |
2287 | * This routine is called from the work-queue when the interrupt | |
2288 | * routine has signalled that a hangup has occurred. The path of | |
2289 | * hangup processing is: | |
2290 | * | |
2291 | * serial interrupt routine -> (workqueue) -> | |
2292 | * do_sx_hangup() -> tty->hangup() -> sx_hangup() | |
2293 | * | |
2294 | */ | |
2295 | static void do_sx_hangup(void *private_) | |
2296 | { | |
2297 | struct specialix_port *port = (struct specialix_port *) private_; | |
2298 | struct tty_struct *tty; | |
2299 | ||
2300 | func_enter(); | |
2301 | ||
2302 | tty = port->tty; | |
2303 | if (tty) | |
2304 | tty_hangup(tty); /* FIXME: module removal race here */ | |
2305 | ||
2306 | func_exit(); | |
2307 | } | |
2308 | ||
2309 | ||
2310 | static void sx_hangup(struct tty_struct * tty) | |
2311 | { | |
2312 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; | |
2313 | struct specialix_board *bp; | |
2314 | unsigned long flags; | |
2315 | ||
2316 | func_enter(); | |
2317 | ||
2318 | if (sx_paranoia_check(port, tty->name, "sx_hangup")) { | |
2319 | func_exit(); | |
2320 | return; | |
2321 | } | |
2322 | ||
2323 | bp = port_Board(port); | |
2324 | ||
2325 | sx_shutdown_port(bp, port); | |
2326 | spin_lock_irqsave(&port->lock, flags); | |
2327 | port->event = 0; | |
2328 | bp->count -= port->count; | |
2329 | if (bp->count < 0) { | |
2330 | printk(KERN_ERR "sx%d: sx_hangup: bad board count: %d port: %d\n", | |
2331 | board_No(bp), bp->count, tty->index); | |
2332 | bp->count = 0; | |
2333 | } | |
2334 | port->count = 0; | |
2335 | port->flags &= ~ASYNC_NORMAL_ACTIVE; | |
2336 | port->tty = NULL; | |
2337 | spin_unlock_irqrestore(&port->lock, flags); | |
2338 | wake_up_interruptible(&port->open_wait); | |
2339 | ||
2340 | func_exit(); | |
2341 | } | |
2342 | ||
2343 | ||
2344 | static void sx_set_termios(struct tty_struct * tty, struct termios * old_termios) | |
2345 | { | |
2346 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; | |
2347 | unsigned long flags; | |
2348 | struct specialix_board * bp; | |
2349 | ||
2350 | if (sx_paranoia_check(port, tty->name, "sx_set_termios")) | |
2351 | return; | |
2352 | ||
2353 | if (tty->termios->c_cflag == old_termios->c_cflag && | |
2354 | tty->termios->c_iflag == old_termios->c_iflag) | |
2355 | return; | |
2356 | ||
2357 | bp = port_Board(port); | |
2358 | spin_lock_irqsave(&port->lock, flags); | |
2359 | sx_change_speed(port_Board(port), port); | |
2360 | spin_unlock_irqrestore(&port->lock, flags); | |
2361 | ||
2362 | if ((old_termios->c_cflag & CRTSCTS) && | |
2363 | !(tty->termios->c_cflag & CRTSCTS)) { | |
2364 | tty->hw_stopped = 0; | |
2365 | sx_start(tty); | |
2366 | } | |
2367 | } | |
2368 | ||
2369 | ||
2370 | static void do_softint(void *private_) | |
2371 | { | |
2372 | struct specialix_port *port = (struct specialix_port *) private_; | |
2373 | struct tty_struct *tty; | |
2374 | ||
2375 | func_enter(); | |
2376 | ||
2377 | if(!(tty = port->tty)) { | |
2378 | func_exit(); | |
2379 | return; | |
2380 | } | |
2381 | ||
2382 | if (test_and_clear_bit(RS_EVENT_WRITE_WAKEUP, &port->event)) { | |
2383 | tty_wakeup(tty); | |
2384 | //wake_up_interruptible(&tty->write_wait); | |
2385 | } | |
2386 | ||
2387 | func_exit(); | |
2388 | } | |
2389 | ||
2390 | static struct tty_operations sx_ops = { | |
2391 | .open = sx_open, | |
2392 | .close = sx_close, | |
2393 | .write = sx_write, | |
2394 | .put_char = sx_put_char, | |
2395 | .flush_chars = sx_flush_chars, | |
2396 | .write_room = sx_write_room, | |
2397 | .chars_in_buffer = sx_chars_in_buffer, | |
2398 | .flush_buffer = sx_flush_buffer, | |
2399 | .ioctl = sx_ioctl, | |
2400 | .throttle = sx_throttle, | |
2401 | .unthrottle = sx_unthrottle, | |
2402 | .set_termios = sx_set_termios, | |
2403 | .stop = sx_stop, | |
2404 | .start = sx_start, | |
2405 | .hangup = sx_hangup, | |
2406 | .tiocmget = sx_tiocmget, | |
2407 | .tiocmset = sx_tiocmset, | |
2408 | }; | |
2409 | ||
2410 | static int sx_init_drivers(void) | |
2411 | { | |
2412 | int error; | |
2413 | int i; | |
2414 | ||
2415 | func_enter(); | |
2416 | ||
2417 | specialix_driver = alloc_tty_driver(SX_NBOARD * SX_NPORT); | |
2418 | if (!specialix_driver) { | |
2419 | printk(KERN_ERR "sx: Couldn't allocate tty_driver.\n"); | |
2420 | func_exit(); | |
2421 | return 1; | |
2422 | } | |
2423 | ||
2424 | if (!(tmp_buf = (unsigned char *) get_zeroed_page(GFP_KERNEL))) { | |
2425 | printk(KERN_ERR "sx: Couldn't get free page.\n"); | |
2426 | put_tty_driver(specialix_driver); | |
2427 | func_exit(); | |
2428 | return 1; | |
2429 | } | |
2430 | specialix_driver->owner = THIS_MODULE; | |
2431 | specialix_driver->name = "ttyW"; | |
2432 | specialix_driver->major = SPECIALIX_NORMAL_MAJOR; | |
2433 | specialix_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
2434 | specialix_driver->subtype = SERIAL_TYPE_NORMAL; | |
2435 | specialix_driver->init_termios = tty_std_termios; | |
2436 | specialix_driver->init_termios.c_cflag = | |
2437 | B9600 | CS8 | CREAD | HUPCL | CLOCAL; | |
2438 | specialix_driver->flags = TTY_DRIVER_REAL_RAW; | |
2439 | tty_set_operations(specialix_driver, &sx_ops); | |
2440 | ||
2441 | if ((error = tty_register_driver(specialix_driver))) { | |
2442 | put_tty_driver(specialix_driver); | |
2443 | free_page((unsigned long)tmp_buf); | |
2444 | printk(KERN_ERR "sx: Couldn't register specialix IO8+ driver, error = %d\n", | |
2445 | error); | |
2446 | func_exit(); | |
2447 | return 1; | |
2448 | } | |
2449 | memset(sx_port, 0, sizeof(sx_port)); | |
2450 | for (i = 0; i < SX_NPORT * SX_NBOARD; i++) { | |
2451 | sx_port[i].magic = SPECIALIX_MAGIC; | |
2452 | INIT_WORK(&sx_port[i].tqueue, do_softint, &sx_port[i]); | |
2453 | INIT_WORK(&sx_port[i].tqueue_hangup, do_sx_hangup, &sx_port[i]); | |
2454 | sx_port[i].close_delay = 50 * HZ/100; | |
2455 | sx_port[i].closing_wait = 3000 * HZ/100; | |
2456 | init_waitqueue_head(&sx_port[i].open_wait); | |
2457 | init_waitqueue_head(&sx_port[i].close_wait); | |
2458 | spin_lock_init(&sx_port[i].lock); | |
2459 | } | |
2460 | ||
2461 | func_exit(); | |
2462 | return 0; | |
2463 | } | |
2464 | ||
2465 | static void sx_release_drivers(void) | |
2466 | { | |
2467 | func_enter(); | |
2468 | ||
2469 | free_page((unsigned long)tmp_buf); | |
2470 | tty_unregister_driver(specialix_driver); | |
2471 | put_tty_driver(specialix_driver); | |
2472 | func_exit(); | |
2473 | } | |
2474 | ||
2475 | /* | |
2476 | * This routine must be called by kernel at boot time | |
2477 | */ | |
2478 | static int __init specialix_init(void) | |
2479 | { | |
2480 | int i; | |
2481 | int found = 0; | |
2482 | ||
2483 | func_enter(); | |
2484 | ||
2485 | printk(KERN_INFO "sx: Specialix IO8+ driver v" VERSION ", (c) R.E.Wolff 1997/1998.\n"); | |
2486 | printk(KERN_INFO "sx: derived from work (c) D.Gorodchanin 1994-1996.\n"); | |
2487 | #ifdef CONFIG_SPECIALIX_RTSCTS | |
2488 | printk (KERN_INFO "sx: DTR/RTS pin is always RTS.\n"); | |
2489 | #else | |
2490 | printk (KERN_INFO "sx: DTR/RTS pin is RTS when CRTSCTS is on.\n"); | |
2491 | #endif | |
2492 | ||
2493 | for (i = 0; i < SX_NBOARD; i++) | |
2494 | sx_board[i].lock = SPIN_LOCK_UNLOCKED; | |
2495 | ||
2496 | if (sx_init_drivers()) { | |
2497 | func_exit(); | |
2498 | return -EIO; | |
2499 | } | |
2500 | ||
2501 | for (i = 0; i < SX_NBOARD; i++) | |
2502 | if (sx_board[i].base && !sx_probe(&sx_board[i])) | |
2503 | found++; | |
2504 | ||
2505 | #ifdef CONFIG_PCI | |
2506 | { | |
2507 | struct pci_dev *pdev = NULL; | |
2508 | ||
2509 | i=0; | |
2510 | while (i < SX_NBOARD) { | |
2511 | if (sx_board[i].flags & SX_BOARD_PRESENT) { | |
2512 | i++; | |
2513 | continue; | |
2514 | } | |
2515 | pdev = pci_find_device (PCI_VENDOR_ID_SPECIALIX, | |
2516 | PCI_DEVICE_ID_SPECIALIX_IO8, | |
2517 | pdev); | |
2518 | if (!pdev) break; | |
2519 | ||
2520 | if (pci_enable_device(pdev)) | |
2521 | continue; | |
2522 | ||
2523 | sx_board[i].irq = pdev->irq; | |
2524 | ||
2525 | sx_board[i].base = pci_resource_start (pdev, 2); | |
2526 | ||
2527 | sx_board[i].flags |= SX_BOARD_IS_PCI; | |
2528 | if (!sx_probe(&sx_board[i])) | |
2529 | found ++; | |
2530 | } | |
2531 | } | |
2532 | #endif | |
2533 | ||
2534 | if (!found) { | |
2535 | sx_release_drivers(); | |
2536 | printk(KERN_INFO "sx: No specialix IO8+ boards detected.\n"); | |
2537 | func_exit(); | |
2538 | return -EIO; | |
2539 | } | |
2540 | ||
2541 | func_exit(); | |
2542 | return 0; | |
2543 | } | |
2544 | ||
2545 | static int iobase[SX_NBOARD] = {0,}; | |
2546 | ||
2547 | static int irq [SX_NBOARD] = {0,}; | |
2548 | ||
2549 | module_param_array(iobase, int, NULL, 0); | |
2550 | module_param_array(irq, int, NULL, 0); | |
2551 | module_param(sx_debug, int, 0); | |
2552 | module_param(sx_rxfifo, int, 0); | |
2553 | #ifdef SPECIALIX_TIMER | |
2554 | module_param(sx_poll, int, 0); | |
2555 | #endif | |
2556 | ||
2557 | /* | |
2558 | * You can setup up to 4 boards. | |
2559 | * by specifying "iobase=0xXXX,0xXXX ..." as insmod parameter. | |
2560 | * You should specify the IRQs too in that case "irq=....,...". | |
2561 | * | |
2562 | * More than 4 boards in one computer is not possible, as the card can | |
2563 | * only use 4 different interrupts. | |
2564 | * | |
2565 | */ | |
2566 | static int __init specialix_init_module(void) | |
2567 | { | |
2568 | int i; | |
2569 | ||
2570 | func_enter(); | |
2571 | ||
2572 | init_MUTEX(&tmp_buf_sem); /* Init de the semaphore - pvdl */ | |
2573 | ||
2574 | if (iobase[0] || iobase[1] || iobase[2] || iobase[3]) { | |
2575 | for(i = 0; i < SX_NBOARD; i++) { | |
2576 | sx_board[i].base = iobase[i]; | |
2577 | sx_board[i].irq = irq[i]; | |
2578 | sx_board[i].count= 0; | |
2579 | } | |
2580 | } | |
2581 | ||
2582 | func_exit(); | |
2583 | ||
2584 | return specialix_init(); | |
2585 | } | |
2586 | ||
2587 | static void __exit specialix_exit_module(void) | |
2588 | { | |
2589 | int i; | |
2590 | ||
2591 | func_enter(); | |
2592 | ||
2593 | sx_release_drivers(); | |
2594 | for (i = 0; i < SX_NBOARD; i++) | |
2595 | if (sx_board[i].flags & SX_BOARD_PRESENT) | |
2596 | sx_release_io_range(&sx_board[i]); | |
2597 | #ifdef SPECIALIX_TIMER | |
2598 | del_timer (&missed_irq_timer); | |
2599 | #endif | |
2600 | ||
2601 | func_exit(); | |
2602 | } | |
2603 | ||
2604 | module_init(specialix_init_module); | |
2605 | module_exit(specialix_exit_module); | |
2606 | ||
2607 | MODULE_LICENSE("GPL"); |