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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. | |
d61780c0 JG |
41 | * Revision 1.1: April 14th 1997. |
42 | * Incorporated Richard Hudsons suggestions, | |
1da177e4 LT |
43 | * removed some debugging printk's. |
44 | * Revision 1.2: April 15th 1997. | |
45 | * Ported to 2.1.x kernels. | |
d61780c0 JG |
46 | * Revision 1.3: April 17th 1997 |
47 | * Backported to 2.0. (Compatibility macros). | |
1da177e4 | 48 | * Revision 1.4: April 18th 1997 |
d61780c0 JG |
49 | * Fixed DTR/RTS bug that caused the card to indicate |
50 | * "don't send data" to a modem after the password prompt. | |
1da177e4 LT |
51 | * Fixed bug for premature (fake) interrupts. |
52 | * Revision 1.5: April 19th 1997 | |
d61780c0 | 53 | * fixed a minor typo in the header file, cleanup a little. |
1da177e4 LT |
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. | |
d61780c0 JG |
63 | * Revision 1.10: Oct 22 1999 / Jan 21 2000. |
64 | * Added stuff for setserial. | |
1da177e4 | 65 | * Nicolas Mailhot (Nicolas.Mailhot@email.enst.fr) |
d61780c0 | 66 | * |
1da177e4 LT |
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> | |
33f0f88f | 88 | #include <linux/tty_flip.h> |
1da177e4 LT |
89 | #include <linux/mm.h> |
90 | #include <linux/serial.h> | |
91 | #include <linux/fcntl.h> | |
92 | #include <linux/major.h> | |
93 | #include <linux/delay.h> | |
1da177e4 LT |
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 | ||
d61780c0 | 157 | /* |
1da177e4 LT |
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; | |
1da177e4 LT |
187 | |
188 | static unsigned long baud_table[] = { | |
189 | 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800, | |
d61780c0 | 190 | 9600, 19200, 38400, 57600, 115200, 0, |
1da177e4 LT |
191 | }; |
192 | ||
193 | static struct specialix_board sx_board[SX_NBOARD] = { | |
194 | { 0, SX_IOBASE1, 9, }, | |
195 | { 0, SX_IOBASE2, 11, }, | |
196 | { 0, SX_IOBASE3, 12, }, | |
197 | { 0, SX_IOBASE4, 15, }, | |
198 | }; | |
199 | ||
200 | static struct specialix_port sx_port[SX_NBOARD * SX_NPORT]; | |
201 | ||
202 | ||
203 | #ifdef SPECIALIX_TIMER | |
204 | static struct timer_list missed_irq_timer; | |
205 | static irqreturn_t sx_interrupt(int irq, void * dev_id, struct pt_regs * regs); | |
206 | #endif | |
207 | ||
208 | ||
209 | ||
210 | static inline int sx_paranoia_check(struct specialix_port const * port, | |
211 | char *name, const char *routine) | |
212 | { | |
213 | #ifdef SPECIALIX_PARANOIA_CHECK | |
214 | static const char *badmagic = | |
215 | KERN_ERR "sx: Warning: bad specialix port magic number for device %s in %s\n"; | |
216 | static const char *badinfo = | |
217 | KERN_ERR "sx: Warning: null specialix port for device %s in %s\n"; | |
d61780c0 | 218 | |
1da177e4 LT |
219 | if (!port) { |
220 | printk(badinfo, name, routine); | |
221 | return 1; | |
222 | } | |
223 | if (port->magic != SPECIALIX_MAGIC) { | |
224 | printk(badmagic, name, routine); | |
225 | return 1; | |
226 | } | |
227 | #endif | |
228 | return 0; | |
229 | } | |
230 | ||
231 | ||
232 | /* | |
d61780c0 | 233 | * |
1da177e4 | 234 | * Service functions for specialix IO8+ driver. |
d61780c0 | 235 | * |
1da177e4 LT |
236 | */ |
237 | ||
238 | /* Get board number from pointer */ | |
239 | static inline int board_No (struct specialix_board * bp) | |
240 | { | |
241 | return bp - sx_board; | |
242 | } | |
243 | ||
244 | ||
245 | /* Get port number from pointer */ | |
246 | static inline int port_No (struct specialix_port const * port) | |
247 | { | |
d61780c0 | 248 | return SX_PORT(port - sx_port); |
1da177e4 LT |
249 | } |
250 | ||
251 | ||
252 | /* Get pointer to board from pointer to port */ | |
253 | static inline struct specialix_board * port_Board(struct specialix_port const * port) | |
254 | { | |
255 | return &sx_board[SX_BOARD(port - sx_port)]; | |
256 | } | |
257 | ||
258 | ||
259 | /* Input Byte from CL CD186x register */ | |
260 | static inline unsigned char sx_in(struct specialix_board * bp, unsigned short reg) | |
261 | { | |
262 | bp->reg = reg | 0x80; | |
263 | outb (reg | 0x80, bp->base + SX_ADDR_REG); | |
264 | return inb (bp->base + SX_DATA_REG); | |
265 | } | |
266 | ||
267 | ||
268 | /* Output Byte to CL CD186x register */ | |
269 | static inline void sx_out(struct specialix_board * bp, unsigned short reg, | |
270 | unsigned char val) | |
271 | { | |
272 | bp->reg = reg | 0x80; | |
273 | outb (reg | 0x80, bp->base + SX_ADDR_REG); | |
274 | outb (val, bp->base + SX_DATA_REG); | |
275 | } | |
276 | ||
277 | ||
278 | /* Input Byte from CL CD186x register */ | |
279 | static inline unsigned char sx_in_off(struct specialix_board * bp, unsigned short reg) | |
280 | { | |
281 | bp->reg = reg; | |
282 | outb (reg, bp->base + SX_ADDR_REG); | |
283 | return inb (bp->base + SX_DATA_REG); | |
284 | } | |
285 | ||
286 | ||
287 | /* Output Byte to CL CD186x register */ | |
288 | static inline void sx_out_off(struct specialix_board * bp, unsigned short reg, | |
289 | unsigned char val) | |
290 | { | |
291 | bp->reg = reg; | |
292 | outb (reg, bp->base + SX_ADDR_REG); | |
293 | outb (val, bp->base + SX_DATA_REG); | |
294 | } | |
295 | ||
296 | ||
297 | /* Wait for Channel Command Register ready */ | |
298 | static inline void sx_wait_CCR(struct specialix_board * bp) | |
299 | { | |
300 | unsigned long delay, flags; | |
301 | unsigned char ccr; | |
302 | ||
303 | for (delay = SX_CCR_TIMEOUT; delay; delay--) { | |
304 | spin_lock_irqsave(&bp->lock, flags); | |
305 | ccr = sx_in(bp, CD186x_CCR); | |
306 | spin_unlock_irqrestore(&bp->lock, flags); | |
307 | if (!ccr) | |
308 | return; | |
309 | udelay (1); | |
310 | } | |
d61780c0 | 311 | |
1da177e4 LT |
312 | printk(KERN_ERR "sx%d: Timeout waiting for CCR.\n", board_No(bp)); |
313 | } | |
314 | ||
315 | ||
316 | /* Wait for Channel Command Register ready */ | |
317 | static inline void sx_wait_CCR_off(struct specialix_board * bp) | |
318 | { | |
319 | unsigned long delay; | |
320 | unsigned char crr; | |
321 | unsigned long flags; | |
322 | ||
323 | for (delay = SX_CCR_TIMEOUT; delay; delay--) { | |
324 | spin_lock_irqsave(&bp->lock, flags); | |
325 | crr = sx_in_off(bp, CD186x_CCR); | |
326 | spin_unlock_irqrestore(&bp->lock, flags); | |
327 | if (!crr) | |
328 | return; | |
329 | udelay (1); | |
330 | } | |
d61780c0 | 331 | |
1da177e4 LT |
332 | printk(KERN_ERR "sx%d: Timeout waiting for CCR.\n", board_No(bp)); |
333 | } | |
334 | ||
335 | ||
336 | /* | |
337 | * specialix IO8+ IO range functions. | |
338 | */ | |
339 | ||
d61780c0 | 340 | static inline int sx_request_io_range(struct specialix_board * bp) |
1da177e4 | 341 | { |
d61780c0 JG |
342 | return request_region(bp->base, |
343 | bp->flags & SX_BOARD_IS_PCI ? SX_PCI_IO_SPACE : SX_IO_SPACE, | |
344 | "specialix IO8+") == NULL; | |
1da177e4 LT |
345 | } |
346 | ||
347 | ||
348 | static inline void sx_release_io_range(struct specialix_board * bp) | |
349 | { | |
d61780c0 | 350 | release_region(bp->base, |
1da177e4 LT |
351 | bp->flags&SX_BOARD_IS_PCI?SX_PCI_IO_SPACE:SX_IO_SPACE); |
352 | } | |
353 | ||
d61780c0 | 354 | |
1da177e4 | 355 | /* Must be called with enabled interrupts */ |
d61780c0 | 356 | /* Ugly. Very ugly. Don't use this for anything else than initialization |
1da177e4 LT |
357 | code */ |
358 | static inline void sx_long_delay(unsigned long delay) | |
359 | { | |
360 | unsigned long i; | |
d61780c0 | 361 | |
1da177e4 LT |
362 | for (i = jiffies + delay; time_after(i, jiffies); ) ; |
363 | } | |
364 | ||
365 | ||
366 | ||
367 | /* Set the IRQ using the RTS lines that run to the PAL on the board.... */ | |
368 | static int sx_set_irq ( struct specialix_board *bp) | |
369 | { | |
370 | int virq; | |
371 | int i; | |
372 | unsigned long flags; | |
373 | ||
d61780c0 | 374 | if (bp->flags & SX_BOARD_IS_PCI) |
1da177e4 LT |
375 | return 1; |
376 | switch (bp->irq) { | |
377 | /* In the same order as in the docs... */ | |
378 | case 15: virq = 0;break; | |
379 | case 12: virq = 1;break; | |
380 | case 11: virq = 2;break; | |
381 | case 9: virq = 3;break; | |
382 | default: printk (KERN_ERR "Speclialix: cannot set irq to %d.\n", bp->irq); | |
383 | return 0; | |
384 | } | |
385 | spin_lock_irqsave(&bp->lock, flags); | |
386 | for (i=0;i<2;i++) { | |
387 | sx_out(bp, CD186x_CAR, i); | |
388 | sx_out(bp, CD186x_MSVRTS, ((virq >> i) & 0x1)? MSVR_RTS:0); | |
389 | } | |
390 | spin_unlock_irqrestore(&bp->lock, flags); | |
391 | return 1; | |
392 | } | |
393 | ||
394 | ||
395 | /* Reset and setup CD186x chip */ | |
396 | static int sx_init_CD186x(struct specialix_board * bp) | |
397 | { | |
398 | unsigned long flags; | |
399 | int scaler; | |
400 | int rv = 1; | |
401 | ||
402 | func_enter(); | |
403 | sx_wait_CCR_off(bp); /* Wait for CCR ready */ | |
404 | spin_lock_irqsave(&bp->lock, flags); | |
405 | sx_out_off(bp, CD186x_CCR, CCR_HARDRESET); /* Reset CD186x chip */ | |
406 | spin_unlock_irqrestore(&bp->lock, flags); | |
407 | sx_long_delay(HZ/20); /* Delay 0.05 sec */ | |
408 | spin_lock_irqsave(&bp->lock, flags); | |
409 | sx_out_off(bp, CD186x_GIVR, SX_ID); /* Set ID for this chip */ | |
410 | sx_out_off(bp, CD186x_GICR, 0); /* Clear all bits */ | |
411 | sx_out_off(bp, CD186x_PILR1, SX_ACK_MINT); /* Prio for modem intr */ | |
412 | sx_out_off(bp, CD186x_PILR2, SX_ACK_TINT); /* Prio for transmitter intr */ | |
413 | sx_out_off(bp, CD186x_PILR3, SX_ACK_RINT); /* Prio for receiver intr */ | |
414 | /* Set RegAckEn */ | |
415 | sx_out_off(bp, CD186x_SRCR, sx_in (bp, CD186x_SRCR) | SRCR_REGACKEN); | |
d61780c0 | 416 | |
1da177e4 LT |
417 | /* Setting up prescaler. We need 4 ticks per 1 ms */ |
418 | scaler = SX_OSCFREQ/SPECIALIX_TPS; | |
419 | ||
420 | sx_out_off(bp, CD186x_PPRH, scaler >> 8); | |
421 | sx_out_off(bp, CD186x_PPRL, scaler & 0xff); | |
422 | spin_unlock_irqrestore(&bp->lock, flags); | |
423 | ||
424 | if (!sx_set_irq (bp)) { | |
425 | /* Figure out how to pass this along... */ | |
426 | printk (KERN_ERR "Cannot set irq to %d.\n", bp->irq); | |
427 | rv = 0; | |
428 | } | |
429 | ||
430 | func_exit(); | |
431 | return rv; | |
432 | } | |
433 | ||
434 | ||
435 | static int read_cross_byte (struct specialix_board *bp, int reg, int bit) | |
436 | { | |
437 | int i; | |
438 | int t; | |
439 | unsigned long flags; | |
440 | ||
441 | spin_lock_irqsave(&bp->lock, flags); | |
442 | for (i=0, t=0;i<8;i++) { | |
443 | sx_out_off (bp, CD186x_CAR, i); | |
d61780c0 | 444 | if (sx_in_off (bp, reg) & bit) |
1da177e4 LT |
445 | t |= 1 << i; |
446 | } | |
447 | spin_unlock_irqrestore(&bp->lock, flags); | |
448 | ||
449 | return t; | |
450 | } | |
451 | ||
452 | ||
453 | #ifdef SPECIALIX_TIMER | |
454 | void missed_irq (unsigned long data) | |
455 | { | |
456 | unsigned char irq; | |
457 | unsigned long flags; | |
458 | struct specialix_board *bp = (struct specialix_board *)data; | |
459 | ||
460 | spin_lock_irqsave(&bp->lock, flags); | |
461 | irq = sx_in ((struct specialix_board *)data, CD186x_SRSR) & | |
462 | (SRSR_RREQint | | |
463 | SRSR_TREQint | | |
464 | SRSR_MREQint); | |
465 | spin_unlock_irqrestore(&bp->lock, flags); | |
466 | if (irq) { | |
467 | printk (KERN_INFO "Missed interrupt... Calling int from timer. \n"); | |
d61780c0 | 468 | sx_interrupt (((struct specialix_board *)data)->irq, |
1da177e4 LT |
469 | (void*)data, NULL); |
470 | } | |
471 | missed_irq_timer.expires = jiffies + sx_poll; | |
472 | add_timer (&missed_irq_timer); | |
473 | } | |
474 | #endif | |
475 | ||
476 | ||
477 | ||
478 | /* Main probing routine, also sets irq. */ | |
479 | static int sx_probe(struct specialix_board *bp) | |
480 | { | |
481 | unsigned char val1, val2; | |
482 | #if 0 | |
483 | int irqs = 0; | |
484 | int retries; | |
485 | #endif | |
486 | int rev; | |
487 | int chip; | |
488 | ||
489 | func_enter(); | |
490 | ||
d61780c0 | 491 | if (sx_request_io_range(bp)) { |
1da177e4 LT |
492 | func_exit(); |
493 | return 1; | |
494 | } | |
495 | ||
496 | /* Are the I/O ports here ? */ | |
497 | sx_out_off(bp, CD186x_PPRL, 0x5a); | |
498 | short_pause (); | |
499 | val1 = sx_in_off(bp, CD186x_PPRL); | |
500 | ||
501 | sx_out_off(bp, CD186x_PPRL, 0xa5); | |
502 | short_pause (); | |
503 | val2 = sx_in_off(bp, CD186x_PPRL); | |
504 | ||
d61780c0 | 505 | |
1da177e4 LT |
506 | if ((val1 != 0x5a) || (val2 != 0xa5)) { |
507 | printk(KERN_INFO "sx%d: specialix IO8+ Board at 0x%03x not found.\n", | |
508 | board_No(bp), bp->base); | |
d61780c0 | 509 | sx_release_io_range(bp); |
1da177e4 LT |
510 | func_exit(); |
511 | return 1; | |
512 | } | |
513 | ||
d61780c0 | 514 | /* Check the DSR lines that Specialix uses as board |
1da177e4 LT |
515 | identification */ |
516 | val1 = read_cross_byte (bp, CD186x_MSVR, MSVR_DSR); | |
517 | val2 = read_cross_byte (bp, CD186x_MSVR, MSVR_RTS); | |
518 | dprintk (SX_DEBUG_INIT, "sx%d: DSR lines are: %02x, rts lines are: %02x\n", | |
519 | board_No(bp), val1, val2); | |
520 | ||
521 | /* They managed to switch the bit order between the docs and | |
522 | the IO8+ card. The new PCI card now conforms to old docs. | |
523 | They changed the PCI docs to reflect the situation on the | |
524 | old card. */ | |
525 | val2 = (bp->flags & SX_BOARD_IS_PCI)?0x4d : 0xb2; | |
526 | if (val1 != val2) { | |
527 | printk(KERN_INFO "sx%d: specialix IO8+ ID %02x at 0x%03x not found (%02x).\n", | |
528 | board_No(bp), val2, bp->base, val1); | |
d61780c0 | 529 | sx_release_io_range(bp); |
1da177e4 LT |
530 | func_exit(); |
531 | return 1; | |
532 | } | |
533 | ||
534 | ||
535 | #if 0 | |
536 | /* It's time to find IRQ for this board */ | |
537 | for (retries = 0; retries < 5 && irqs <= 0; retries++) { | |
538 | irqs = probe_irq_on(); | |
539 | sx_init_CD186x(bp); /* Reset CD186x chip */ | |
540 | sx_out(bp, CD186x_CAR, 2); /* Select port 2 */ | |
541 | sx_wait_CCR(bp); | |
542 | sx_out(bp, CD186x_CCR, CCR_TXEN); /* Enable transmitter */ | |
543 | sx_out(bp, CD186x_IER, IER_TXRDY); /* Enable tx empty intr */ | |
d61780c0 | 544 | sx_long_delay(HZ/20); |
1da177e4 LT |
545 | irqs = probe_irq_off(irqs); |
546 | ||
547 | dprintk (SX_DEBUG_INIT, "SRSR = %02x, ", sx_in(bp, CD186x_SRSR)); | |
548 | dprintk (SX_DEBUG_INIT, "TRAR = %02x, ", sx_in(bp, CD186x_TRAR)); | |
549 | dprintk (SX_DEBUG_INIT, "GIVR = %02x, ", sx_in(bp, CD186x_GIVR)); | |
550 | dprintk (SX_DEBUG_INIT, "GICR = %02x, ", sx_in(bp, CD186x_GICR)); | |
551 | dprintk (SX_DEBUG_INIT, "\n"); | |
552 | ||
553 | /* Reset CD186x again */ | |
554 | if (!sx_init_CD186x(bp)) { | |
555 | /* Hmmm. This is dead code anyway. */ | |
556 | } | |
557 | ||
558 | dprintk (SX_DEBUG_INIT "val1 = %02x, val2 = %02x, val3 = %02x.\n", | |
d61780c0 JG |
559 | val1, val2, val3); |
560 | ||
1da177e4 | 561 | } |
d61780c0 | 562 | |
1da177e4 LT |
563 | #if 0 |
564 | if (irqs <= 0) { | |
565 | printk(KERN_ERR "sx%d: Can't find IRQ for specialix IO8+ board at 0x%03x.\n", | |
566 | board_No(bp), bp->base); | |
d61780c0 | 567 | sx_release_io_range(bp); |
1da177e4 LT |
568 | func_exit(); |
569 | return 1; | |
570 | } | |
571 | #endif | |
572 | printk (KERN_INFO "Started with irq=%d, but now have irq=%d.\n", bp->irq, irqs); | |
573 | if (irqs > 0) | |
574 | bp->irq = irqs; | |
575 | #endif | |
576 | /* Reset CD186x again */ | |
577 | if (!sx_init_CD186x(bp)) { | |
d61780c0 | 578 | sx_release_io_range(bp); |
1da177e4 | 579 | func_exit(); |
d61780c0 | 580 | return 1; |
1da177e4 LT |
581 | } |
582 | ||
583 | sx_request_io_range(bp); | |
584 | bp->flags |= SX_BOARD_PRESENT; | |
d61780c0 | 585 | |
1da177e4 LT |
586 | /* Chip revcode pkgtype |
587 | GFRCR SRCR bit 7 | |
588 | CD180 rev B 0x81 0 | |
589 | CD180 rev C 0x82 0 | |
590 | CD1864 rev A 0x82 1 | |
d61780c0 | 591 | CD1865 rev A 0x83 1 -- Do not use!!! Does not work. |
1da177e4 LT |
592 | CD1865 rev B 0x84 1 |
593 | -- Thanks to Gwen Wang, Cirrus Logic. | |
594 | */ | |
595 | ||
596 | switch (sx_in_off(bp, CD186x_GFRCR)) { | |
597 | case 0x82:chip = 1864;rev='A';break; | |
598 | case 0x83:chip = 1865;rev='A';break; | |
599 | case 0x84:chip = 1865;rev='B';break; | |
600 | case 0x85:chip = 1865;rev='C';break; /* Does not exist at this time */ | |
601 | default:chip=-1;rev='x'; | |
602 | } | |
603 | ||
604 | dprintk (SX_DEBUG_INIT, " GFCR = 0x%02x\n", sx_in_off(bp, CD186x_GFRCR) ); | |
605 | ||
606 | #ifdef SPECIALIX_TIMER | |
607 | init_timer (&missed_irq_timer); | |
608 | missed_irq_timer.function = missed_irq; | |
609 | missed_irq_timer.data = (unsigned long) bp; | |
610 | missed_irq_timer.expires = jiffies + sx_poll; | |
611 | add_timer (&missed_irq_timer); | |
612 | #endif | |
613 | ||
614 | printk(KERN_INFO"sx%d: specialix IO8+ board detected at 0x%03x, IRQ %d, CD%d Rev. %c.\n", | |
615 | board_No(bp), | |
616 | bp->base, bp->irq, | |
617 | chip, rev); | |
618 | ||
619 | func_exit(); | |
620 | return 0; | |
621 | } | |
622 | ||
d61780c0 JG |
623 | /* |
624 | * | |
1da177e4 LT |
625 | * Interrupt processing routines. |
626 | * */ | |
627 | ||
628 | static inline void sx_mark_event(struct specialix_port * port, int event) | |
629 | { | |
630 | func_enter(); | |
631 | ||
632 | set_bit(event, &port->event); | |
633 | schedule_work(&port->tqueue); | |
634 | ||
635 | func_exit(); | |
636 | } | |
637 | ||
638 | ||
639 | static inline struct specialix_port * sx_get_port(struct specialix_board * bp, | |
640 | unsigned char const * what) | |
641 | { | |
642 | unsigned char channel; | |
643 | struct specialix_port * port = NULL; | |
644 | ||
645 | channel = sx_in(bp, CD186x_GICR) >> GICR_CHAN_OFF; | |
646 | dprintk (SX_DEBUG_CHAN, "channel: %d\n", channel); | |
647 | if (channel < CD186x_NCH) { | |
648 | port = &sx_port[board_No(bp) * SX_NPORT + channel]; | |
649 | dprintk (SX_DEBUG_CHAN, "port: %d %p flags: 0x%x\n",board_No(bp) * SX_NPORT + channel, port, port->flags & ASYNC_INITIALIZED); | |
650 | ||
651 | if (port->flags & ASYNC_INITIALIZED) { | |
652 | dprintk (SX_DEBUG_CHAN, "port: %d %p\n", channel, port); | |
653 | func_exit(); | |
654 | return port; | |
655 | } | |
656 | } | |
d61780c0 | 657 | printk(KERN_INFO "sx%d: %s interrupt from invalid port %d\n", |
1da177e4 LT |
658 | board_No(bp), what, channel); |
659 | return NULL; | |
660 | } | |
661 | ||
662 | ||
663 | static inline void sx_receive_exc(struct specialix_board * bp) | |
664 | { | |
665 | struct specialix_port *port; | |
666 | struct tty_struct *tty; | |
667 | unsigned char status; | |
33f0f88f | 668 | unsigned char ch, flag; |
1da177e4 LT |
669 | |
670 | func_enter(); | |
671 | ||
672 | port = sx_get_port(bp, "Receive"); | |
673 | if (!port) { | |
674 | dprintk (SX_DEBUG_RX, "Hmm, couldn't find port.\n"); | |
675 | func_exit(); | |
676 | return; | |
677 | } | |
678 | tty = port->tty; | |
d61780c0 | 679 | |
1da177e4 LT |
680 | status = sx_in(bp, CD186x_RCSR); |
681 | ||
682 | dprintk (SX_DEBUG_RX, "status: 0x%x\n", status); | |
683 | if (status & RCSR_OE) { | |
684 | port->overrun++; | |
685 | dprintk(SX_DEBUG_FIFO, "sx%d: port %d: Overrun. Total %ld overruns.\n", | |
686 | board_No(bp), port_No(port), port->overrun); | |
687 | } | |
688 | status &= port->mark_mask; | |
689 | ||
690 | /* This flip buffer check needs to be below the reading of the | |
691 | status register to reset the chip's IRQ.... */ | |
33f0f88f | 692 | if (tty_buffer_request_room(tty, 1) == 0) { |
1da177e4 LT |
693 | dprintk(SX_DEBUG_FIFO, "sx%d: port %d: Working around flip buffer overflow.\n", |
694 | board_No(bp), port_No(port)); | |
695 | func_exit(); | |
696 | return; | |
697 | } | |
698 | ||
699 | ch = sx_in(bp, CD186x_RDR); | |
700 | if (!status) { | |
701 | func_exit(); | |
702 | return; | |
703 | } | |
704 | if (status & RCSR_TOUT) { | |
d61780c0 | 705 | printk(KERN_INFO "sx%d: port %d: Receiver timeout. Hardware problems ?\n", |
1da177e4 LT |
706 | board_No(bp), port_No(port)); |
707 | func_exit(); | |
708 | return; | |
d61780c0 | 709 | |
1da177e4 LT |
710 | } else if (status & RCSR_BREAK) { |
711 | dprintk(SX_DEBUG_RX, "sx%d: port %d: Handling break...\n", | |
712 | board_No(bp), port_No(port)); | |
33f0f88f | 713 | flag = TTY_BREAK; |
1da177e4 LT |
714 | if (port->flags & ASYNC_SAK) |
715 | do_SAK(tty); | |
d61780c0 JG |
716 | |
717 | } else if (status & RCSR_PE) | |
33f0f88f | 718 | flag = TTY_PARITY; |
d61780c0 JG |
719 | |
720 | else if (status & RCSR_FE) | |
33f0f88f | 721 | flag = TTY_FRAME; |
d61780c0 | 722 | |
1da177e4 | 723 | else if (status & RCSR_OE) |
33f0f88f | 724 | flag = TTY_OVERRUN; |
d61780c0 | 725 | |
1da177e4 | 726 | else |
33f0f88f | 727 | flag = TTY_NORMAL; |
1da177e4 | 728 | |
33f0f88f AC |
729 | if(tty_insert_flip_char(tty, ch, flag)) |
730 | tty_flip_buffer_push(tty); | |
1da177e4 LT |
731 | func_exit(); |
732 | } | |
733 | ||
734 | ||
735 | static inline void sx_receive(struct specialix_board * bp) | |
736 | { | |
737 | struct specialix_port *port; | |
738 | struct tty_struct *tty; | |
739 | unsigned char count; | |
740 | ||
741 | func_enter(); | |
d61780c0 | 742 | |
1da177e4 LT |
743 | if (!(port = sx_get_port(bp, "Receive"))) { |
744 | dprintk (SX_DEBUG_RX, "Hmm, couldn't find port.\n"); | |
745 | func_exit(); | |
746 | return; | |
747 | } | |
748 | tty = port->tty; | |
d61780c0 | 749 | |
1da177e4 LT |
750 | count = sx_in(bp, CD186x_RDCR); |
751 | dprintk (SX_DEBUG_RX, "port: %p: count: %d\n", port, count); | |
752 | port->hits[count > 8 ? 9 : count]++; | |
d61780c0 | 753 | |
33f0f88f | 754 | tty_buffer_request_room(tty, count); |
1da177e4 | 755 | |
33f0f88f AC |
756 | while (count--) |
757 | tty_insert_flip_char(tty, sx_in(bp, CD186x_RDR), TTY_NORMAL); | |
758 | tty_flip_buffer_push(tty); | |
1da177e4 LT |
759 | func_exit(); |
760 | } | |
761 | ||
762 | ||
763 | static inline void sx_transmit(struct specialix_board * bp) | |
764 | { | |
765 | struct specialix_port *port; | |
766 | struct tty_struct *tty; | |
767 | unsigned char count; | |
768 | ||
769 | func_enter(); | |
770 | if (!(port = sx_get_port(bp, "Transmit"))) { | |
771 | func_exit(); | |
772 | return; | |
773 | } | |
774 | dprintk (SX_DEBUG_TX, "port: %p\n", port); | |
775 | tty = port->tty; | |
d61780c0 | 776 | |
1da177e4 LT |
777 | if (port->IER & IER_TXEMPTY) { |
778 | /* FIFO drained */ | |
779 | sx_out(bp, CD186x_CAR, port_No(port)); | |
780 | port->IER &= ~IER_TXEMPTY; | |
781 | sx_out(bp, CD186x_IER, port->IER); | |
782 | func_exit(); | |
783 | return; | |
784 | } | |
d61780c0 | 785 | |
1da177e4 LT |
786 | if ((port->xmit_cnt <= 0 && !port->break_length) |
787 | || tty->stopped || tty->hw_stopped) { | |
788 | sx_out(bp, CD186x_CAR, port_No(port)); | |
789 | port->IER &= ~IER_TXRDY; | |
790 | sx_out(bp, CD186x_IER, port->IER); | |
791 | func_exit(); | |
792 | return; | |
793 | } | |
d61780c0 | 794 | |
1da177e4 LT |
795 | if (port->break_length) { |
796 | if (port->break_length > 0) { | |
797 | if (port->COR2 & COR2_ETC) { | |
798 | sx_out(bp, CD186x_TDR, CD186x_C_ESC); | |
799 | sx_out(bp, CD186x_TDR, CD186x_C_SBRK); | |
800 | port->COR2 &= ~COR2_ETC; | |
801 | } | |
802 | count = min_t(int, port->break_length, 0xff); | |
803 | sx_out(bp, CD186x_TDR, CD186x_C_ESC); | |
804 | sx_out(bp, CD186x_TDR, CD186x_C_DELAY); | |
805 | sx_out(bp, CD186x_TDR, count); | |
806 | if (!(port->break_length -= count)) | |
807 | port->break_length--; | |
808 | } else { | |
809 | sx_out(bp, CD186x_TDR, CD186x_C_ESC); | |
810 | sx_out(bp, CD186x_TDR, CD186x_C_EBRK); | |
811 | sx_out(bp, CD186x_COR2, port->COR2); | |
812 | sx_wait_CCR(bp); | |
813 | sx_out(bp, CD186x_CCR, CCR_CORCHG2); | |
814 | port->break_length = 0; | |
815 | } | |
816 | ||
817 | func_exit(); | |
818 | return; | |
819 | } | |
d61780c0 | 820 | |
1da177e4 LT |
821 | count = CD186x_NFIFO; |
822 | do { | |
823 | sx_out(bp, CD186x_TDR, port->xmit_buf[port->xmit_tail++]); | |
824 | port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE-1); | |
825 | if (--port->xmit_cnt <= 0) | |
826 | break; | |
827 | } while (--count > 0); | |
d61780c0 | 828 | |
1da177e4 LT |
829 | if (port->xmit_cnt <= 0) { |
830 | sx_out(bp, CD186x_CAR, port_No(port)); | |
831 | port->IER &= ~IER_TXRDY; | |
832 | sx_out(bp, CD186x_IER, port->IER); | |
833 | } | |
834 | if (port->xmit_cnt <= port->wakeup_chars) | |
835 | sx_mark_event(port, RS_EVENT_WRITE_WAKEUP); | |
836 | ||
837 | func_exit(); | |
838 | } | |
839 | ||
840 | ||
841 | static inline void sx_check_modem(struct specialix_board * bp) | |
842 | { | |
843 | struct specialix_port *port; | |
844 | struct tty_struct *tty; | |
845 | unsigned char mcr; | |
846 | int msvr_cd; | |
847 | ||
848 | dprintk (SX_DEBUG_SIGNALS, "Modem intr. "); | |
849 | if (!(port = sx_get_port(bp, "Modem"))) | |
850 | return; | |
d61780c0 | 851 | |
1da177e4 | 852 | tty = port->tty; |
d61780c0 | 853 | |
1da177e4 LT |
854 | mcr = sx_in(bp, CD186x_MCR); |
855 | printk ("mcr = %02x.\n", mcr); | |
856 | ||
857 | if ((mcr & MCR_CDCHG)) { | |
858 | dprintk (SX_DEBUG_SIGNALS, "CD just changed... "); | |
859 | msvr_cd = sx_in(bp, CD186x_MSVR) & MSVR_CD; | |
860 | if (msvr_cd) { | |
861 | dprintk (SX_DEBUG_SIGNALS, "Waking up guys in open.\n"); | |
862 | wake_up_interruptible(&port->open_wait); | |
863 | } else { | |
864 | dprintk (SX_DEBUG_SIGNALS, "Sending HUP.\n"); | |
865 | schedule_work(&port->tqueue_hangup); | |
866 | } | |
867 | } | |
d61780c0 | 868 | |
1da177e4 LT |
869 | #ifdef SPECIALIX_BRAIN_DAMAGED_CTS |
870 | if (mcr & MCR_CTSCHG) { | |
871 | if (sx_in(bp, CD186x_MSVR) & MSVR_CTS) { | |
872 | tty->hw_stopped = 0; | |
873 | port->IER |= IER_TXRDY; | |
874 | if (port->xmit_cnt <= port->wakeup_chars) | |
875 | sx_mark_event(port, RS_EVENT_WRITE_WAKEUP); | |
876 | } else { | |
877 | tty->hw_stopped = 1; | |
878 | port->IER &= ~IER_TXRDY; | |
879 | } | |
880 | sx_out(bp, CD186x_IER, port->IER); | |
881 | } | |
882 | if (mcr & MCR_DSSXHG) { | |
883 | if (sx_in(bp, CD186x_MSVR) & MSVR_DSR) { | |
884 | tty->hw_stopped = 0; | |
885 | port->IER |= IER_TXRDY; | |
886 | if (port->xmit_cnt <= port->wakeup_chars) | |
887 | sx_mark_event(port, RS_EVENT_WRITE_WAKEUP); | |
888 | } else { | |
889 | tty->hw_stopped = 1; | |
890 | port->IER &= ~IER_TXRDY; | |
891 | } | |
892 | sx_out(bp, CD186x_IER, port->IER); | |
893 | } | |
894 | #endif /* SPECIALIX_BRAIN_DAMAGED_CTS */ | |
d61780c0 | 895 | |
1da177e4 LT |
896 | /* Clear change bits */ |
897 | sx_out(bp, CD186x_MCR, 0); | |
898 | } | |
899 | ||
900 | ||
901 | /* The main interrupt processing routine */ | |
902 | static irqreturn_t sx_interrupt(int irq, void *dev_id, struct pt_regs *regs) | |
903 | { | |
904 | unsigned char status; | |
905 | unsigned char ack; | |
906 | struct specialix_board *bp; | |
907 | unsigned long loop = 0; | |
908 | int saved_reg; | |
909 | unsigned long flags; | |
910 | ||
911 | func_enter(); | |
912 | ||
913 | bp = dev_id; | |
914 | spin_lock_irqsave(&bp->lock, flags); | |
915 | ||
916 | 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); | |
917 | if (!bp || !(bp->flags & SX_BOARD_ACTIVE)) { | |
918 | dprintk (SX_DEBUG_IRQ, "sx: False interrupt. irq %d.\n", irq); | |
919 | spin_unlock_irqrestore(&bp->lock, flags); | |
920 | func_exit(); | |
921 | return IRQ_NONE; | |
922 | } | |
923 | ||
924 | saved_reg = bp->reg; | |
925 | ||
926 | while ((++loop < 16) && (status = (sx_in(bp, CD186x_SRSR) & | |
927 | (SRSR_RREQint | | |
928 | SRSR_TREQint | | |
d61780c0 | 929 | SRSR_MREQint)))) { |
1da177e4 LT |
930 | if (status & SRSR_RREQint) { |
931 | ack = sx_in(bp, CD186x_RRAR); | |
932 | ||
933 | if (ack == (SX_ID | GIVR_IT_RCV)) | |
934 | sx_receive(bp); | |
935 | else if (ack == (SX_ID | GIVR_IT_REXC)) | |
936 | sx_receive_exc(bp); | |
937 | else | |
938 | printk(KERN_ERR "sx%d: status: 0x%x Bad receive ack 0x%02x.\n", | |
939 | board_No(bp), status, ack); | |
d61780c0 | 940 | |
1da177e4 LT |
941 | } else if (status & SRSR_TREQint) { |
942 | ack = sx_in(bp, CD186x_TRAR); | |
943 | ||
944 | if (ack == (SX_ID | GIVR_IT_TX)) | |
945 | sx_transmit(bp); | |
946 | else | |
947 | printk(KERN_ERR "sx%d: status: 0x%x Bad transmit ack 0x%02x. port: %d\n", | |
948 | board_No(bp), status, ack, port_No (sx_get_port (bp, "Int"))); | |
949 | } else if (status & SRSR_MREQint) { | |
950 | ack = sx_in(bp, CD186x_MRAR); | |
951 | ||
d61780c0 | 952 | if (ack == (SX_ID | GIVR_IT_MODEM)) |
1da177e4 LT |
953 | sx_check_modem(bp); |
954 | else | |
955 | printk(KERN_ERR "sx%d: status: 0x%x Bad modem ack 0x%02x.\n", | |
956 | board_No(bp), status, ack); | |
d61780c0 JG |
957 | |
958 | } | |
1da177e4 LT |
959 | |
960 | sx_out(bp, CD186x_EOIR, 0); /* Mark end of interrupt */ | |
961 | } | |
962 | bp->reg = saved_reg; | |
963 | outb (bp->reg, bp->base + SX_ADDR_REG); | |
964 | spin_unlock_irqrestore(&bp->lock, flags); | |
965 | func_exit(); | |
966 | return IRQ_HANDLED; | |
967 | } | |
968 | ||
969 | ||
970 | /* | |
971 | * Routines for open & close processing. | |
972 | */ | |
973 | ||
974 | static void turn_ints_off (struct specialix_board *bp) | |
975 | { | |
976 | unsigned long flags; | |
977 | ||
978 | func_enter(); | |
979 | if (bp->flags & SX_BOARD_IS_PCI) { | |
980 | /* This was intended for enabeling the interrupt on the | |
981 | * PCI card. However it seems that it's already enabled | |
982 | * and as PCI interrupts can be shared, there is no real | |
983 | * reason to have to turn it off. */ | |
984 | } | |
985 | ||
986 | spin_lock_irqsave(&bp->lock, flags); | |
987 | (void) sx_in_off (bp, 0); /* Turn off interrupts. */ | |
988 | spin_unlock_irqrestore(&bp->lock, flags); | |
989 | ||
990 | func_exit(); | |
991 | } | |
992 | ||
993 | static void turn_ints_on (struct specialix_board *bp) | |
994 | { | |
995 | unsigned long flags; | |
996 | ||
997 | func_enter(); | |
998 | ||
999 | if (bp->flags & SX_BOARD_IS_PCI) { | |
1000 | /* play with the PCI chip. See comment above. */ | |
1001 | } | |
1002 | spin_lock_irqsave(&bp->lock, flags); | |
1003 | (void) sx_in (bp, 0); /* Turn ON interrupts. */ | |
1004 | spin_unlock_irqrestore(&bp->lock, flags); | |
1005 | ||
1006 | func_exit(); | |
1007 | } | |
1008 | ||
1009 | ||
1010 | /* Called with disabled interrupts */ | |
1011 | static inline int sx_setup_board(struct specialix_board * bp) | |
1012 | { | |
1013 | int error; | |
1014 | ||
d61780c0 | 1015 | if (bp->flags & SX_BOARD_ACTIVE) |
1da177e4 LT |
1016 | return 0; |
1017 | ||
1018 | if (bp->flags & SX_BOARD_IS_PCI) | |
1019 | error = request_irq(bp->irq, sx_interrupt, SA_INTERRUPT | SA_SHIRQ, "specialix IO8+", bp); | |
1020 | else | |
1021 | error = request_irq(bp->irq, sx_interrupt, SA_INTERRUPT, "specialix IO8+", bp); | |
1022 | ||
d61780c0 | 1023 | if (error) |
1da177e4 LT |
1024 | return error; |
1025 | ||
1026 | turn_ints_on (bp); | |
1027 | bp->flags |= SX_BOARD_ACTIVE; | |
1028 | ||
1029 | return 0; | |
1030 | } | |
1031 | ||
1032 | ||
1033 | /* Called with disabled interrupts */ | |
1034 | static inline void sx_shutdown_board(struct specialix_board *bp) | |
1035 | { | |
1036 | func_enter(); | |
1037 | ||
1038 | if (!(bp->flags & SX_BOARD_ACTIVE)) { | |
1039 | func_exit(); | |
1040 | return; | |
1041 | } | |
1042 | ||
1043 | bp->flags &= ~SX_BOARD_ACTIVE; | |
d61780c0 | 1044 | |
1da177e4 LT |
1045 | dprintk (SX_DEBUG_IRQ, "Freeing IRQ%d for board %d.\n", |
1046 | bp->irq, board_No (bp)); | |
1047 | free_irq(bp->irq, bp); | |
1048 | ||
1049 | turn_ints_off (bp); | |
1050 | ||
1051 | ||
1052 | func_exit(); | |
1053 | } | |
1054 | ||
1055 | ||
1056 | /* | |
d61780c0 | 1057 | * Setting up port characteristics. |
1da177e4 LT |
1058 | * Must be called with disabled interrupts |
1059 | */ | |
1060 | static void sx_change_speed(struct specialix_board *bp, struct specialix_port *port) | |
1061 | { | |
1062 | struct tty_struct *tty; | |
1063 | unsigned long baud; | |
1064 | long tmp; | |
1065 | unsigned char cor1 = 0, cor3 = 0; | |
1066 | unsigned char mcor1 = 0, mcor2 = 0; | |
1067 | static unsigned long again; | |
1068 | unsigned long flags; | |
1069 | ||
1070 | func_enter(); | |
1071 | ||
1072 | if (!(tty = port->tty) || !tty->termios) { | |
1073 | func_exit(); | |
1074 | return; | |
1075 | } | |
1076 | ||
1077 | port->IER = 0; | |
1078 | port->COR2 = 0; | |
1079 | /* Select port on the board */ | |
1080 | spin_lock_irqsave(&bp->lock, flags); | |
1081 | sx_out(bp, CD186x_CAR, port_No(port)); | |
1082 | ||
1083 | /* The Specialix board doens't implement the RTS lines. | |
1084 | They are used to set the IRQ level. Don't touch them. */ | |
1085 | if (SX_CRTSCTS(tty)) | |
1086 | port->MSVR = MSVR_DTR | (sx_in(bp, CD186x_MSVR) & MSVR_RTS); | |
1087 | else | |
1088 | port->MSVR = (sx_in(bp, CD186x_MSVR) & MSVR_RTS); | |
1089 | spin_unlock_irqrestore(&bp->lock, flags); | |
1090 | dprintk (SX_DEBUG_TERMIOS, "sx: got MSVR=%02x.\n", port->MSVR); | |
1091 | baud = C_BAUD(tty); | |
d61780c0 | 1092 | |
1da177e4 LT |
1093 | if (baud & CBAUDEX) { |
1094 | baud &= ~CBAUDEX; | |
d61780c0 | 1095 | if (baud < 1 || baud > 2) |
1da177e4 LT |
1096 | port->tty->termios->c_cflag &= ~CBAUDEX; |
1097 | else | |
1098 | baud += 15; | |
1099 | } | |
1100 | if (baud == 15) { | |
1101 | if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) | |
1102 | baud ++; | |
1103 | if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) | |
1104 | baud += 2; | |
1105 | } | |
d61780c0 JG |
1106 | |
1107 | ||
1da177e4 LT |
1108 | if (!baud_table[baud]) { |
1109 | /* Drop DTR & exit */ | |
1110 | dprintk (SX_DEBUG_TERMIOS, "Dropping DTR... Hmm....\n"); | |
1111 | if (!SX_CRTSCTS (tty)) { | |
1112 | port -> MSVR &= ~ MSVR_DTR; | |
1113 | spin_lock_irqsave(&bp->lock, flags); | |
1114 | sx_out(bp, CD186x_MSVR, port->MSVR ); | |
1115 | spin_unlock_irqrestore(&bp->lock, flags); | |
d61780c0 | 1116 | } |
1da177e4 LT |
1117 | else |
1118 | dprintk (SX_DEBUG_TERMIOS, "Can't drop DTR: no DTR.\n"); | |
1119 | return; | |
1120 | } else { | |
1121 | /* Set DTR on */ | |
1122 | if (!SX_CRTSCTS (tty)) { | |
1123 | port ->MSVR |= MSVR_DTR; | |
1124 | } | |
1125 | } | |
d61780c0 | 1126 | |
1da177e4 | 1127 | /* |
d61780c0 | 1128 | * Now we must calculate some speed depended things |
1da177e4 LT |
1129 | */ |
1130 | ||
1131 | /* Set baud rate for port */ | |
1132 | tmp = port->custom_divisor ; | |
1133 | if ( tmp ) | |
1134 | printk (KERN_INFO "sx%d: Using custom baud rate divisor %ld. \n" | |
1135 | "This is an untested option, please be carefull.\n", | |
1136 | port_No (port), tmp); | |
1137 | else | |
1138 | tmp = (((SX_OSCFREQ + baud_table[baud]/2) / baud_table[baud] + | |
1139 | CD186x_TPC/2) / CD186x_TPC); | |
1140 | ||
d61780c0 | 1141 | if ((tmp < 0x10) && time_before(again, jiffies)) { |
1da177e4 LT |
1142 | again = jiffies + HZ * 60; |
1143 | /* Page 48 of version 2.0 of the CL-CD1865 databook */ | |
1144 | if (tmp >= 12) { | |
1145 | printk (KERN_INFO "sx%d: Baud rate divisor is %ld. \n" | |
1146 | "Performance degradation is possible.\n" | |
1147 | "Read specialix.txt for more info.\n", | |
1148 | port_No (port), tmp); | |
1149 | } else { | |
1150 | printk (KERN_INFO "sx%d: Baud rate divisor is %ld. \n" | |
1151 | "Warning: overstressing Cirrus chip. " | |
1152 | "This might not work.\n" | |
d61780c0 | 1153 | "Read specialix.txt for more info.\n", |
1da177e4 LT |
1154 | port_No (port), tmp); |
1155 | } | |
1156 | } | |
1157 | spin_lock_irqsave(&bp->lock, flags); | |
d61780c0 JG |
1158 | sx_out(bp, CD186x_RBPRH, (tmp >> 8) & 0xff); |
1159 | sx_out(bp, CD186x_TBPRH, (tmp >> 8) & 0xff); | |
1160 | sx_out(bp, CD186x_RBPRL, tmp & 0xff); | |
1da177e4 LT |
1161 | sx_out(bp, CD186x_TBPRL, tmp & 0xff); |
1162 | spin_unlock_irqrestore(&bp->lock, flags); | |
1163 | if (port->custom_divisor) { | |
1164 | baud = (SX_OSCFREQ + port->custom_divisor/2) / port->custom_divisor; | |
1165 | baud = ( baud + 5 ) / 10; | |
d61780c0 | 1166 | } else |
1da177e4 LT |
1167 | baud = (baud_table[baud] + 5) / 10; /* Estimated CPS */ |
1168 | ||
1169 | /* Two timer ticks seems enough to wakeup something like SLIP driver */ | |
d61780c0 | 1170 | tmp = ((baud + HZ/2) / HZ) * 2 - CD186x_NFIFO; |
1da177e4 LT |
1171 | port->wakeup_chars = (tmp < 0) ? 0 : ((tmp >= SERIAL_XMIT_SIZE) ? |
1172 | SERIAL_XMIT_SIZE - 1 : tmp); | |
d61780c0 | 1173 | |
1da177e4 LT |
1174 | /* Receiver timeout will be transmission time for 1.5 chars */ |
1175 | tmp = (SPECIALIX_TPS + SPECIALIX_TPS/2 + baud/2) / baud; | |
1176 | tmp = (tmp > 0xff) ? 0xff : tmp; | |
1177 | spin_lock_irqsave(&bp->lock, flags); | |
1178 | sx_out(bp, CD186x_RTPR, tmp); | |
1179 | spin_unlock_irqrestore(&bp->lock, flags); | |
1180 | switch (C_CSIZE(tty)) { | |
1181 | case CS5: | |
1182 | cor1 |= COR1_5BITS; | |
1183 | break; | |
1184 | case CS6: | |
1185 | cor1 |= COR1_6BITS; | |
1186 | break; | |
1187 | case CS7: | |
1188 | cor1 |= COR1_7BITS; | |
1189 | break; | |
1190 | case CS8: | |
1191 | cor1 |= COR1_8BITS; | |
1192 | break; | |
1193 | } | |
d61780c0 JG |
1194 | |
1195 | if (C_CSTOPB(tty)) | |
1da177e4 | 1196 | cor1 |= COR1_2SB; |
d61780c0 | 1197 | |
1da177e4 LT |
1198 | cor1 |= COR1_IGNORE; |
1199 | if (C_PARENB(tty)) { | |
1200 | cor1 |= COR1_NORMPAR; | |
d61780c0 | 1201 | if (C_PARODD(tty)) |
1da177e4 | 1202 | cor1 |= COR1_ODDP; |
d61780c0 | 1203 | if (I_INPCK(tty)) |
1da177e4 LT |
1204 | cor1 &= ~COR1_IGNORE; |
1205 | } | |
1206 | /* Set marking of some errors */ | |
1207 | port->mark_mask = RCSR_OE | RCSR_TOUT; | |
d61780c0 | 1208 | if (I_INPCK(tty)) |
1da177e4 | 1209 | port->mark_mask |= RCSR_FE | RCSR_PE; |
d61780c0 | 1210 | if (I_BRKINT(tty) || I_PARMRK(tty)) |
1da177e4 | 1211 | port->mark_mask |= RCSR_BREAK; |
d61780c0 | 1212 | if (I_IGNPAR(tty)) |
1da177e4 LT |
1213 | port->mark_mask &= ~(RCSR_FE | RCSR_PE); |
1214 | if (I_IGNBRK(tty)) { | |
1215 | port->mark_mask &= ~RCSR_BREAK; | |
d61780c0 | 1216 | if (I_IGNPAR(tty)) |
1da177e4 LT |
1217 | /* Real raw mode. Ignore all */ |
1218 | port->mark_mask &= ~RCSR_OE; | |
1219 | } | |
1220 | /* Enable Hardware Flow Control */ | |
1221 | if (C_CRTSCTS(tty)) { | |
1222 | #ifdef SPECIALIX_BRAIN_DAMAGED_CTS | |
1223 | port->IER |= IER_DSR | IER_CTS; | |
1224 | mcor1 |= MCOR1_DSRZD | MCOR1_CTSZD; | |
1225 | mcor2 |= MCOR2_DSROD | MCOR2_CTSOD; | |
1226 | spin_lock_irqsave(&bp->lock, flags); | |
1227 | tty->hw_stopped = !(sx_in(bp, CD186x_MSVR) & (MSVR_CTS|MSVR_DSR)); | |
1228 | spin_unlock_irqrestore(&bp->lock, flags); | |
1229 | #else | |
d61780c0 | 1230 | port->COR2 |= COR2_CTSAE; |
1da177e4 LT |
1231 | #endif |
1232 | } | |
1233 | /* Enable Software Flow Control. FIXME: I'm not sure about this */ | |
1234 | /* Some people reported that it works, but I still doubt it */ | |
1235 | if (I_IXON(tty)) { | |
1236 | port->COR2 |= COR2_TXIBE; | |
1237 | cor3 |= (COR3_FCT | COR3_SCDE); | |
1238 | if (I_IXANY(tty)) | |
1239 | port->COR2 |= COR2_IXM; | |
1240 | spin_lock_irqsave(&bp->lock, flags); | |
1241 | sx_out(bp, CD186x_SCHR1, START_CHAR(tty)); | |
1242 | sx_out(bp, CD186x_SCHR2, STOP_CHAR(tty)); | |
1243 | sx_out(bp, CD186x_SCHR3, START_CHAR(tty)); | |
1244 | sx_out(bp, CD186x_SCHR4, STOP_CHAR(tty)); | |
1245 | spin_unlock_irqrestore(&bp->lock, flags); | |
1246 | } | |
1247 | if (!C_CLOCAL(tty)) { | |
1248 | /* Enable CD check */ | |
1249 | port->IER |= IER_CD; | |
1250 | mcor1 |= MCOR1_CDZD; | |
1251 | mcor2 |= MCOR2_CDOD; | |
1252 | } | |
d61780c0 JG |
1253 | |
1254 | if (C_CREAD(tty)) | |
1da177e4 LT |
1255 | /* Enable receiver */ |
1256 | port->IER |= IER_RXD; | |
d61780c0 | 1257 | |
1da177e4 LT |
1258 | /* Set input FIFO size (1-8 bytes) */ |
1259 | cor3 |= sx_rxfifo; | |
1260 | /* Setting up CD186x channel registers */ | |
1261 | spin_lock_irqsave(&bp->lock, flags); | |
1262 | sx_out(bp, CD186x_COR1, cor1); | |
1263 | sx_out(bp, CD186x_COR2, port->COR2); | |
1264 | sx_out(bp, CD186x_COR3, cor3); | |
1265 | spin_unlock_irqrestore(&bp->lock, flags); | |
1266 | /* Make CD186x know about registers change */ | |
1267 | sx_wait_CCR(bp); | |
1268 | spin_lock_irqsave(&bp->lock, flags); | |
1269 | sx_out(bp, CD186x_CCR, CCR_CORCHG1 | CCR_CORCHG2 | CCR_CORCHG3); | |
1270 | /* Setting up modem option registers */ | |
1271 | dprintk (SX_DEBUG_TERMIOS, "Mcor1 = %02x, mcor2 = %02x.\n", mcor1, mcor2); | |
1272 | sx_out(bp, CD186x_MCOR1, mcor1); | |
1273 | sx_out(bp, CD186x_MCOR2, mcor2); | |
1274 | spin_unlock_irqrestore(&bp->lock, flags); | |
1275 | /* Enable CD186x transmitter & receiver */ | |
1276 | sx_wait_CCR(bp); | |
1277 | spin_lock_irqsave(&bp->lock, flags); | |
1278 | sx_out(bp, CD186x_CCR, CCR_TXEN | CCR_RXEN); | |
1279 | /* Enable interrupts */ | |
1280 | sx_out(bp, CD186x_IER, port->IER); | |
1281 | /* And finally set the modem lines... */ | |
1282 | sx_out(bp, CD186x_MSVR, port->MSVR); | |
1283 | spin_unlock_irqrestore(&bp->lock, flags); | |
1284 | ||
1285 | func_exit(); | |
1286 | } | |
1287 | ||
1288 | ||
1289 | /* Must be called with interrupts enabled */ | |
1290 | static int sx_setup_port(struct specialix_board *bp, struct specialix_port *port) | |
1291 | { | |
1292 | unsigned long flags; | |
1293 | ||
1294 | func_enter(); | |
1295 | ||
1296 | if (port->flags & ASYNC_INITIALIZED) { | |
1297 | func_exit(); | |
1298 | return 0; | |
1299 | } | |
d61780c0 | 1300 | |
1da177e4 LT |
1301 | if (!port->xmit_buf) { |
1302 | /* We may sleep in get_zeroed_page() */ | |
1303 | unsigned long tmp; | |
d61780c0 | 1304 | |
1da177e4 LT |
1305 | if (!(tmp = get_zeroed_page(GFP_KERNEL))) { |
1306 | func_exit(); | |
1307 | return -ENOMEM; | |
1308 | } | |
1309 | ||
1310 | if (port->xmit_buf) { | |
1311 | free_page(tmp); | |
1312 | func_exit(); | |
1313 | return -ERESTARTSYS; | |
1314 | } | |
1315 | port->xmit_buf = (unsigned char *) tmp; | |
1316 | } | |
d61780c0 | 1317 | |
1da177e4 LT |
1318 | spin_lock_irqsave(&port->lock, flags); |
1319 | ||
d61780c0 | 1320 | if (port->tty) |
1da177e4 LT |
1321 | clear_bit(TTY_IO_ERROR, &port->tty->flags); |
1322 | ||
1323 | port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; | |
1324 | sx_change_speed(bp, port); | |
1325 | port->flags |= ASYNC_INITIALIZED; | |
1326 | ||
1327 | spin_unlock_irqrestore(&port->lock, flags); | |
1328 | ||
d61780c0 | 1329 | |
1da177e4 LT |
1330 | func_exit(); |
1331 | return 0; | |
1332 | } | |
1333 | ||
1334 | ||
1335 | /* Must be called with interrupts disabled */ | |
1336 | static void sx_shutdown_port(struct specialix_board *bp, struct specialix_port *port) | |
1337 | { | |
1338 | struct tty_struct *tty; | |
1339 | int i; | |
1340 | unsigned long flags; | |
d61780c0 | 1341 | |
1da177e4 LT |
1342 | func_enter(); |
1343 | ||
1344 | if (!(port->flags & ASYNC_INITIALIZED)) { | |
1345 | func_exit(); | |
1346 | return; | |
1347 | } | |
d61780c0 | 1348 | |
1da177e4 LT |
1349 | if (sx_debug & SX_DEBUG_FIFO) { |
1350 | dprintk(SX_DEBUG_FIFO, "sx%d: port %d: %ld overruns, FIFO hits [ ", | |
1351 | board_No(bp), port_No(port), port->overrun); | |
1352 | for (i = 0; i < 10; i++) { | |
1353 | dprintk(SX_DEBUG_FIFO, "%ld ", port->hits[i]); | |
1354 | } | |
1355 | dprintk(SX_DEBUG_FIFO, "].\n"); | |
1356 | } | |
1357 | ||
1358 | if (port->xmit_buf) { | |
1359 | free_page((unsigned long) port->xmit_buf); | |
1360 | port->xmit_buf = NULL; | |
1361 | } | |
1362 | ||
1363 | /* Select port */ | |
1364 | spin_lock_irqsave(&bp->lock, flags); | |
1365 | sx_out(bp, CD186x_CAR, port_No(port)); | |
1366 | ||
1367 | if (!(tty = port->tty) || C_HUPCL(tty)) { | |
1368 | /* Drop DTR */ | |
1369 | sx_out(bp, CD186x_MSVDTR, 0); | |
1370 | } | |
1371 | spin_unlock_irqrestore(&bp->lock, flags); | |
1372 | /* Reset port */ | |
1373 | sx_wait_CCR(bp); | |
1374 | spin_lock_irqsave(&bp->lock, flags); | |
1375 | sx_out(bp, CD186x_CCR, CCR_SOFTRESET); | |
1376 | /* Disable all interrupts from this port */ | |
1377 | port->IER = 0; | |
1378 | sx_out(bp, CD186x_IER, port->IER); | |
1379 | spin_unlock_irqrestore(&bp->lock, flags); | |
1380 | if (tty) | |
1381 | set_bit(TTY_IO_ERROR, &tty->flags); | |
1382 | port->flags &= ~ASYNC_INITIALIZED; | |
d61780c0 JG |
1383 | |
1384 | if (!bp->count) | |
1da177e4 LT |
1385 | sx_shutdown_board(bp); |
1386 | func_exit(); | |
1387 | } | |
1388 | ||
d61780c0 | 1389 | |
1da177e4 LT |
1390 | static int block_til_ready(struct tty_struct *tty, struct file * filp, |
1391 | struct specialix_port *port) | |
1392 | { | |
1393 | DECLARE_WAITQUEUE(wait, current); | |
1394 | struct specialix_board *bp = port_Board(port); | |
1395 | int retval; | |
1396 | int do_clocal = 0; | |
1397 | int CD; | |
1398 | unsigned long flags; | |
1399 | ||
1400 | func_enter(); | |
1401 | ||
1402 | /* | |
1403 | * If the device is in the middle of being closed, then block | |
1404 | * until it's done, and then try again. | |
1405 | */ | |
1406 | if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING) { | |
1407 | interruptible_sleep_on(&port->close_wait); | |
1408 | if (port->flags & ASYNC_HUP_NOTIFY) { | |
1409 | func_exit(); | |
1410 | return -EAGAIN; | |
1411 | } else { | |
1412 | func_exit(); | |
1413 | return -ERESTARTSYS; | |
1414 | } | |
1415 | } | |
d61780c0 | 1416 | |
1da177e4 LT |
1417 | /* |
1418 | * If non-blocking mode is set, or the port is not enabled, | |
1419 | * then make the check up front and then exit. | |
1420 | */ | |
1421 | if ((filp->f_flags & O_NONBLOCK) || | |
1422 | (tty->flags & (1 << TTY_IO_ERROR))) { | |
1423 | port->flags |= ASYNC_NORMAL_ACTIVE; | |
1424 | func_exit(); | |
1425 | return 0; | |
1426 | } | |
1427 | ||
1428 | if (C_CLOCAL(tty)) | |
1429 | do_clocal = 1; | |
1430 | ||
1431 | /* | |
1432 | * Block waiting for the carrier detect and the line to become | |
1433 | * free (i.e., not in use by the callout). While we are in | |
1434 | * this loop, info->count is dropped by one, so that | |
1435 | * rs_close() knows when to free things. We restore it upon | |
1436 | * exit, either normal or abnormal. | |
1437 | */ | |
1438 | retval = 0; | |
1439 | add_wait_queue(&port->open_wait, &wait); | |
1440 | spin_lock_irqsave(&port->lock, flags); | |
1441 | if (!tty_hung_up_p(filp)) { | |
1442 | port->count--; | |
1443 | } | |
1444 | spin_unlock_irqrestore(&port->lock, flags); | |
1445 | port->blocked_open++; | |
1446 | while (1) { | |
1447 | spin_lock_irqsave(&bp->lock, flags); | |
1448 | sx_out(bp, CD186x_CAR, port_No(port)); | |
1449 | CD = sx_in(bp, CD186x_MSVR) & MSVR_CD; | |
1450 | if (SX_CRTSCTS (tty)) { | |
1451 | /* Activate RTS */ | |
1452 | port->MSVR |= MSVR_DTR; /* WTF? */ | |
1453 | sx_out (bp, CD186x_MSVR, port->MSVR); | |
1454 | } else { | |
1455 | /* Activate DTR */ | |
1456 | port->MSVR |= MSVR_DTR; | |
1457 | sx_out (bp, CD186x_MSVR, port->MSVR); | |
1458 | } | |
1459 | spin_unlock_irqrestore(&bp->lock, flags); | |
1460 | set_current_state(TASK_INTERRUPTIBLE); | |
1461 | if (tty_hung_up_p(filp) || | |
1462 | !(port->flags & ASYNC_INITIALIZED)) { | |
1463 | if (port->flags & ASYNC_HUP_NOTIFY) | |
1464 | retval = -EAGAIN; | |
1465 | else | |
d61780c0 | 1466 | retval = -ERESTARTSYS; |
1da177e4 LT |
1467 | break; |
1468 | } | |
1469 | if (!(port->flags & ASYNC_CLOSING) && | |
1470 | (do_clocal || CD)) | |
1471 | break; | |
1472 | if (signal_pending(current)) { | |
1473 | retval = -ERESTARTSYS; | |
1474 | break; | |
1475 | } | |
1476 | schedule(); | |
1477 | } | |
1478 | ||
1479 | set_current_state(TASK_RUNNING); | |
1480 | remove_wait_queue(&port->open_wait, &wait); | |
1481 | spin_lock_irqsave(&port->lock, flags); | |
1482 | if (!tty_hung_up_p(filp)) { | |
1483 | port->count++; | |
1484 | } | |
1485 | port->blocked_open--; | |
1486 | spin_unlock_irqrestore(&port->lock, flags); | |
1487 | if (retval) { | |
1488 | func_exit(); | |
1489 | return retval; | |
1490 | } | |
1491 | ||
1492 | port->flags |= ASYNC_NORMAL_ACTIVE; | |
1493 | func_exit(); | |
1494 | return 0; | |
d61780c0 | 1495 | } |
1da177e4 LT |
1496 | |
1497 | ||
1498 | static int sx_open(struct tty_struct * tty, struct file * filp) | |
1499 | { | |
1500 | int board; | |
1501 | int error; | |
1502 | struct specialix_port * port; | |
1503 | struct specialix_board * bp; | |
1504 | int i; | |
1505 | unsigned long flags; | |
1506 | ||
1507 | func_enter(); | |
1508 | ||
1509 | board = SX_BOARD(tty->index); | |
1510 | ||
1511 | if (board >= SX_NBOARD || !(sx_board[board].flags & SX_BOARD_PRESENT)) { | |
1512 | func_exit(); | |
1513 | return -ENODEV; | |
1514 | } | |
d61780c0 | 1515 | |
1da177e4 LT |
1516 | bp = &sx_board[board]; |
1517 | port = sx_port + board * SX_NPORT + SX_PORT(tty->index); | |
1518 | port->overrun = 0; | |
1519 | for (i = 0; i < 10; i++) | |
1520 | port->hits[i]=0; | |
1521 | ||
1522 | dprintk (SX_DEBUG_OPEN, "Board = %d, bp = %p, port = %p, portno = %d.\n", | |
1523 | board, bp, port, SX_PORT(tty->index)); | |
1524 | ||
1525 | if (sx_paranoia_check(port, tty->name, "sx_open")) { | |
1526 | func_enter(); | |
1527 | return -ENODEV; | |
1528 | } | |
1529 | ||
1530 | if ((error = sx_setup_board(bp))) { | |
1531 | func_exit(); | |
1532 | return error; | |
1533 | } | |
1534 | ||
1535 | spin_lock_irqsave(&bp->lock, flags); | |
1536 | port->count++; | |
1537 | bp->count++; | |
1538 | tty->driver_data = port; | |
1539 | port->tty = tty; | |
1540 | spin_unlock_irqrestore(&bp->lock, flags); | |
1541 | ||
1542 | if ((error = sx_setup_port(bp, port))) { | |
1543 | func_enter(); | |
1544 | return error; | |
1545 | } | |
d61780c0 | 1546 | |
1da177e4 LT |
1547 | if ((error = block_til_ready(tty, filp, port))) { |
1548 | func_enter(); | |
1549 | return error; | |
1550 | } | |
1551 | ||
1552 | func_exit(); | |
1553 | return 0; | |
1554 | } | |
1555 | ||
1556 | ||
1557 | static void sx_close(struct tty_struct * tty, struct file * filp) | |
1558 | { | |
1559 | struct specialix_port *port = (struct specialix_port *) tty->driver_data; | |
1560 | struct specialix_board *bp; | |
1561 | unsigned long flags; | |
1562 | unsigned long timeout; | |
d61780c0 | 1563 | |
1da177e4 LT |
1564 | func_enter(); |
1565 | if (!port || sx_paranoia_check(port, tty->name, "close")) { | |
1566 | func_exit(); | |
1567 | return; | |
1568 | } | |
1569 | spin_lock_irqsave(&port->lock, flags); | |
1570 | ||
1571 | if (tty_hung_up_p(filp)) { | |
1572 | spin_unlock_irqrestore(&port->lock, flags); | |
1573 | func_exit(); | |
1574 | return; | |
1575 | } | |
d61780c0 | 1576 | |
1da177e4 LT |
1577 | bp = port_Board(port); |
1578 | if ((tty->count == 1) && (port->count != 1)) { | |
1579 | printk(KERN_ERR "sx%d: sx_close: bad port count;" | |
1580 | " tty->count is 1, port count is %d\n", | |
1581 | board_No(bp), port->count); | |
1582 | port->count = 1; | |
1583 | } | |
1584 | ||
1585 | if (port->count > 1) { | |
1586 | port->count--; | |
1587 | bp->count--; | |
1588 | ||
1589 | spin_unlock_irqrestore(&port->lock, flags); | |
1590 | ||
1591 | func_exit(); | |
1592 | return; | |
1593 | } | |
1594 | port->flags |= ASYNC_CLOSING; | |
1595 | /* | |
d61780c0 | 1596 | * Now we wait for the transmit buffer to clear; and we notify |
1da177e4 LT |
1597 | * the line discipline to only process XON/XOFF characters. |
1598 | */ | |
1599 | tty->closing = 1; | |
1600 | spin_unlock_irqrestore(&port->lock, flags); | |
1601 | dprintk (SX_DEBUG_OPEN, "Closing\n"); | |
1602 | if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE) { | |
1603 | tty_wait_until_sent(tty, port->closing_wait); | |
1604 | } | |
1605 | /* | |
1606 | * At this point we stop accepting input. To do this, we | |
1607 | * disable the receive line status interrupts, and tell the | |
1608 | * interrupt driver to stop checking the data ready bit in the | |
1609 | * line status register. | |
1610 | */ | |
1611 | dprintk (SX_DEBUG_OPEN, "Closed\n"); | |
1612 | port->IER &= ~IER_RXD; | |
1613 | if (port->flags & ASYNC_INITIALIZED) { | |
1614 | port->IER &= ~IER_TXRDY; | |
1615 | port->IER |= IER_TXEMPTY; | |
1616 | spin_lock_irqsave(&bp->lock, flags); | |
1617 | sx_out(bp, CD186x_CAR, port_No(port)); | |
1618 | sx_out(bp, CD186x_IER, port->IER); | |
1619 | spin_unlock_irqrestore(&bp->lock, flags); | |
1620 | /* | |
1621 | * Before we drop DTR, make sure the UART transmitter | |
1622 | * has completely drained; this is especially | |
1623 | * important if there is a transmit FIFO! | |
1624 | */ | |
1625 | timeout = jiffies+HZ; | |
1626 | while(port->IER & IER_TXEMPTY) { | |
1627 | set_current_state (TASK_INTERRUPTIBLE); | |
1628 | msleep_interruptible(jiffies_to_msecs(port->timeout)); | |
1629 | if (time_after(jiffies, timeout)) { | |
1630 | printk (KERN_INFO "Timeout waiting for close\n"); | |
1631 | break; | |
1632 | } | |
1633 | } | |
1634 | ||
1635 | } | |
1636 | ||
1637 | if (--bp->count < 0) { | |
1638 | printk(KERN_ERR "sx%d: sx_shutdown_port: bad board count: %d port: %d\n", | |
1639 | board_No(bp), bp->count, tty->index); | |
1640 | bp->count = 0; | |
1641 | } | |
1642 | if (--port->count < 0) { | |
1643 | printk(KERN_ERR "sx%d: sx_close: bad port count for tty%d: %d\n", | |
1644 | board_No(bp), port_No(port), port->count); | |
1645 | port->count = 0; | |
1646 | } | |
1647 | ||
1648 | sx_shutdown_port(bp, port); | |
1649 | if (tty->driver->flush_buffer) | |
1650 | tty->driver->flush_buffer(tty); | |
1651 | tty_ldisc_flush(tty); | |
1652 | spin_lock_irqsave(&port->lock, flags); | |
1653 | tty->closing = 0; | |
1654 | port->event = 0; | |
1655 | port->tty = NULL; | |
1656 | spin_unlock_irqrestore(&port->lock, flags); | |
1657 | if (port->blocked_open) { | |
1658 | if (port->close_delay) { | |
1659 | msleep_interruptible(jiffies_to_msecs(port->close_delay)); | |
1660 | } | |
1661 | wake_up_interruptible(&port->open_wait); | |
1662 | } | |
1663 | port->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING); | |
1664 | wake_up_interruptible(&port->close_wait); | |
1665 | ||
1666 | func_exit(); | |
1667 | } | |
1668 | ||
1669 | ||
d61780c0 | 1670 | static int sx_write(struct tty_struct * tty, |
1da177e4 LT |
1671 | const unsigned char *buf, int count) |
1672 | { | |
1673 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; | |
1674 | struct specialix_board *bp; | |
1675 | int c, total = 0; | |
1676 | unsigned long flags; | |
1677 | ||
1678 | func_enter(); | |
1679 | if (sx_paranoia_check(port, tty->name, "sx_write")) { | |
1680 | func_exit(); | |
1681 | return 0; | |
1682 | } | |
d61780c0 | 1683 | |
1da177e4 LT |
1684 | bp = port_Board(port); |
1685 | ||
326f28e9 | 1686 | if (!port->xmit_buf || !tmp_buf) { |
1da177e4 LT |
1687 | func_exit(); |
1688 | return 0; | |
1689 | } | |
1690 | ||
1691 | while (1) { | |
1692 | spin_lock_irqsave(&port->lock, flags); | |
1693 | c = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt - 1, | |
1694 | SERIAL_XMIT_SIZE - port->xmit_head)); | |
1695 | if (c <= 0) { | |
1696 | spin_unlock_irqrestore(&port->lock, flags); | |
1697 | break; | |
1698 | } | |
1699 | memcpy(port->xmit_buf + port->xmit_head, buf, c); | |
1700 | port->xmit_head = (port->xmit_head + c) & (SERIAL_XMIT_SIZE-1); | |
1701 | port->xmit_cnt += c; | |
1702 | spin_unlock_irqrestore(&port->lock, flags); | |
1703 | ||
1704 | buf += c; | |
1705 | count -= c; | |
1706 | total += c; | |
1707 | } | |
1708 | ||
1709 | spin_lock_irqsave(&bp->lock, flags); | |
1710 | if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped && | |
1711 | !(port->IER & IER_TXRDY)) { | |
1712 | port->IER |= IER_TXRDY; | |
1713 | sx_out(bp, CD186x_CAR, port_No(port)); | |
1714 | sx_out(bp, CD186x_IER, port->IER); | |
1715 | } | |
1716 | spin_unlock_irqrestore(&bp->lock, flags); | |
1717 | func_exit(); | |
1718 | ||
1719 | return total; | |
1720 | } | |
1721 | ||
1722 | ||
1723 | static void sx_put_char(struct tty_struct * tty, unsigned char ch) | |
1724 | { | |
1725 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; | |
1726 | unsigned long flags; | |
1727 | struct specialix_board * bp; | |
1728 | ||
1729 | func_enter(); | |
1730 | ||
1731 | if (sx_paranoia_check(port, tty->name, "sx_put_char")) { | |
1732 | func_exit(); | |
1733 | return; | |
1734 | } | |
1735 | dprintk (SX_DEBUG_TX, "check tty: %p %p\n", tty, port->xmit_buf); | |
326f28e9 | 1736 | if (!port->xmit_buf) { |
1da177e4 LT |
1737 | func_exit(); |
1738 | return; | |
1739 | } | |
1740 | bp = port_Board(port); | |
1741 | spin_lock_irqsave(&port->lock, flags); | |
1742 | ||
1743 | dprintk (SX_DEBUG_TX, "xmit_cnt: %d xmit_buf: %p\n", port->xmit_cnt, port->xmit_buf); | |
1744 | if ((port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) || (!port->xmit_buf)) { | |
1745 | spin_unlock_irqrestore(&port->lock, flags); | |
1746 | dprintk (SX_DEBUG_TX, "Exit size\n"); | |
1747 | func_exit(); | |
1748 | return; | |
1749 | } | |
1750 | dprintk (SX_DEBUG_TX, "Handle xmit: %p %p\n", port, port->xmit_buf); | |
1751 | port->xmit_buf[port->xmit_head++] = ch; | |
1752 | port->xmit_head &= SERIAL_XMIT_SIZE - 1; | |
1753 | port->xmit_cnt++; | |
1754 | spin_unlock_irqrestore(&port->lock, flags); | |
1755 | ||
1756 | func_exit(); | |
1757 | } | |
1758 | ||
1759 | ||
1760 | static void sx_flush_chars(struct tty_struct * tty) | |
1761 | { | |
1762 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; | |
1763 | unsigned long flags; | |
1764 | struct specialix_board * bp = port_Board(port); | |
1765 | ||
1766 | func_enter(); | |
1767 | ||
1768 | if (sx_paranoia_check(port, tty->name, "sx_flush_chars")) { | |
1769 | func_exit(); | |
1770 | return; | |
1771 | } | |
1772 | if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped || | |
1773 | !port->xmit_buf) { | |
1774 | func_exit(); | |
1775 | return; | |
1776 | } | |
1777 | spin_lock_irqsave(&bp->lock, flags); | |
1778 | port->IER |= IER_TXRDY; | |
1779 | sx_out(port_Board(port), CD186x_CAR, port_No(port)); | |
1780 | sx_out(port_Board(port), CD186x_IER, port->IER); | |
1781 | spin_unlock_irqrestore(&bp->lock, flags); | |
1782 | ||
1783 | func_exit(); | |
1784 | } | |
1785 | ||
1786 | ||
1787 | static int sx_write_room(struct tty_struct * tty) | |
1788 | { | |
1789 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; | |
1790 | int ret; | |
1791 | ||
1792 | func_enter(); | |
1793 | ||
1794 | if (sx_paranoia_check(port, tty->name, "sx_write_room")) { | |
1795 | func_exit(); | |
1796 | return 0; | |
1797 | } | |
1798 | ||
1799 | ret = SERIAL_XMIT_SIZE - port->xmit_cnt - 1; | |
1800 | if (ret < 0) | |
1801 | ret = 0; | |
1802 | ||
1803 | func_exit(); | |
1804 | return ret; | |
1805 | } | |
1806 | ||
1807 | ||
1808 | static int sx_chars_in_buffer(struct tty_struct *tty) | |
1809 | { | |
1810 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; | |
1811 | ||
1812 | func_enter(); | |
d61780c0 | 1813 | |
1da177e4 LT |
1814 | if (sx_paranoia_check(port, tty->name, "sx_chars_in_buffer")) { |
1815 | func_exit(); | |
1816 | return 0; | |
1817 | } | |
1818 | func_exit(); | |
1819 | return port->xmit_cnt; | |
1820 | } | |
1821 | ||
1822 | ||
1823 | static void sx_flush_buffer(struct tty_struct *tty) | |
1824 | { | |
1825 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; | |
1826 | unsigned long flags; | |
1827 | struct specialix_board * bp; | |
1828 | ||
1829 | func_enter(); | |
1830 | ||
1831 | if (sx_paranoia_check(port, tty->name, "sx_flush_buffer")) { | |
1832 | func_exit(); | |
1833 | return; | |
1834 | } | |
1835 | ||
1836 | bp = port_Board(port); | |
1837 | spin_lock_irqsave(&port->lock, flags); | |
1838 | port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; | |
1839 | spin_unlock_irqrestore(&port->lock, flags); | |
1840 | tty_wakeup(tty); | |
1841 | ||
1842 | func_exit(); | |
1843 | } | |
1844 | ||
1845 | ||
1846 | static int sx_tiocmget(struct tty_struct *tty, struct file *file) | |
1847 | { | |
1848 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; | |
1849 | struct specialix_board * bp; | |
1850 | unsigned char status; | |
1851 | unsigned int result; | |
1852 | unsigned long flags; | |
1853 | ||
1854 | func_enter(); | |
1855 | ||
1856 | if (sx_paranoia_check(port, tty->name, __FUNCTION__)) { | |
1857 | func_exit(); | |
1858 | return -ENODEV; | |
1859 | } | |
1860 | ||
1861 | bp = port_Board(port); | |
1862 | spin_lock_irqsave (&bp->lock, flags); | |
1863 | sx_out(bp, CD186x_CAR, port_No(port)); | |
1864 | status = sx_in(bp, CD186x_MSVR); | |
1865 | spin_unlock_irqrestore(&bp->lock, flags); | |
1866 | dprintk (SX_DEBUG_INIT, "Got msvr[%d] = %02x, car = %d.\n", | |
1867 | port_No(port), status, sx_in (bp, CD186x_CAR)); | |
1868 | dprintk (SX_DEBUG_INIT, "sx_port = %p, port = %p\n", sx_port, port); | |
1869 | if (SX_CRTSCTS(port->tty)) { | |
d61780c0 | 1870 | result = /* (status & MSVR_RTS) ? */ TIOCM_DTR /* : 0) */ |
1da177e4 LT |
1871 | | ((status & MSVR_DTR) ? TIOCM_RTS : 0) |
1872 | | ((status & MSVR_CD) ? TIOCM_CAR : 0) | |
1873 | |/* ((status & MSVR_DSR) ? */ TIOCM_DSR /* : 0) */ | |
1874 | | ((status & MSVR_CTS) ? TIOCM_CTS : 0); | |
1875 | } else { | |
d61780c0 | 1876 | result = /* (status & MSVR_RTS) ? */ TIOCM_RTS /* : 0) */ |
1da177e4 LT |
1877 | | ((status & MSVR_DTR) ? TIOCM_DTR : 0) |
1878 | | ((status & MSVR_CD) ? TIOCM_CAR : 0) | |
1879 | |/* ((status & MSVR_DSR) ? */ TIOCM_DSR /* : 0) */ | |
1880 | | ((status & MSVR_CTS) ? TIOCM_CTS : 0); | |
1881 | } | |
1882 | ||
1883 | func_exit(); | |
1884 | ||
1885 | return result; | |
1886 | } | |
1887 | ||
1888 | ||
1889 | static int sx_tiocmset(struct tty_struct *tty, struct file *file, | |
1890 | unsigned int set, unsigned int clear) | |
1891 | { | |
1892 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; | |
1893 | unsigned long flags; | |
1894 | struct specialix_board *bp; | |
1895 | ||
1896 | func_enter(); | |
1897 | ||
1898 | if (sx_paranoia_check(port, tty->name, __FUNCTION__)) { | |
1899 | func_exit(); | |
1900 | return -ENODEV; | |
1901 | } | |
1902 | ||
1903 | bp = port_Board(port); | |
1904 | ||
1905 | spin_lock_irqsave(&port->lock, flags); | |
1906 | /* if (set & TIOCM_RTS) | |
1907 | port->MSVR |= MSVR_RTS; */ | |
1908 | /* if (set & TIOCM_DTR) | |
1909 | port->MSVR |= MSVR_DTR; */ | |
1910 | ||
1911 | if (SX_CRTSCTS(port->tty)) { | |
1912 | if (set & TIOCM_RTS) | |
1913 | port->MSVR |= MSVR_DTR; | |
1914 | } else { | |
1915 | if (set & TIOCM_DTR) | |
1916 | port->MSVR |= MSVR_DTR; | |
1917 | } | |
1918 | ||
1919 | /* if (clear & TIOCM_RTS) | |
1920 | port->MSVR &= ~MSVR_RTS; */ | |
1921 | /* if (clear & TIOCM_DTR) | |
1922 | port->MSVR &= ~MSVR_DTR; */ | |
1923 | if (SX_CRTSCTS(port->tty)) { | |
1924 | if (clear & TIOCM_RTS) | |
1925 | port->MSVR &= ~MSVR_DTR; | |
1926 | } else { | |
1927 | if (clear & TIOCM_DTR) | |
1928 | port->MSVR &= ~MSVR_DTR; | |
1929 | } | |
1930 | spin_lock_irqsave(&bp->lock, flags); | |
1931 | sx_out(bp, CD186x_CAR, port_No(port)); | |
1932 | sx_out(bp, CD186x_MSVR, port->MSVR); | |
1933 | spin_unlock_irqrestore(&bp->lock, flags); | |
1934 | spin_unlock_irqrestore(&port->lock, flags); | |
1935 | func_exit(); | |
1936 | return 0; | |
1937 | } | |
1938 | ||
1939 | ||
1940 | static inline void sx_send_break(struct specialix_port * port, unsigned long length) | |
1941 | { | |
1942 | struct specialix_board *bp = port_Board(port); | |
1943 | unsigned long flags; | |
d61780c0 | 1944 | |
1da177e4 LT |
1945 | func_enter(); |
1946 | ||
1947 | spin_lock_irqsave (&port->lock, flags); | |
1948 | port->break_length = SPECIALIX_TPS / HZ * length; | |
1949 | port->COR2 |= COR2_ETC; | |
1950 | port->IER |= IER_TXRDY; | |
1951 | spin_lock_irqsave(&bp->lock, flags); | |
1952 | sx_out(bp, CD186x_CAR, port_No(port)); | |
1953 | sx_out(bp, CD186x_COR2, port->COR2); | |
1954 | sx_out(bp, CD186x_IER, port->IER); | |
1955 | spin_unlock_irqrestore(&bp->lock, flags); | |
1956 | spin_unlock_irqrestore (&port->lock, flags); | |
1957 | sx_wait_CCR(bp); | |
1958 | spin_lock_irqsave(&bp->lock, flags); | |
1959 | sx_out(bp, CD186x_CCR, CCR_CORCHG2); | |
1960 | spin_unlock_irqrestore(&bp->lock, flags); | |
1961 | sx_wait_CCR(bp); | |
1962 | ||
1963 | func_exit(); | |
1964 | } | |
1965 | ||
1966 | ||
1967 | static inline int sx_set_serial_info(struct specialix_port * port, | |
1968 | struct serial_struct __user * newinfo) | |
1969 | { | |
1970 | struct serial_struct tmp; | |
1971 | struct specialix_board *bp = port_Board(port); | |
1972 | int change_speed; | |
1973 | ||
1974 | func_enter(); | |
1975 | /* | |
e49332bd | 1976 | if (!access_ok(VERIFY_READ, (void *) newinfo, sizeof(tmp))) { |
1da177e4 | 1977 | func_exit(); |
e49332bd | 1978 | return -EFAULT; |
1da177e4 LT |
1979 | } |
1980 | */ | |
1981 | if (copy_from_user(&tmp, newinfo, sizeof(tmp))) { | |
1982 | func_enter(); | |
1983 | return -EFAULT; | |
1984 | } | |
d61780c0 JG |
1985 | |
1986 | #if 0 | |
1da177e4 LT |
1987 | if ((tmp.irq != bp->irq) || |
1988 | (tmp.port != bp->base) || | |
1989 | (tmp.type != PORT_CIRRUS) || | |
1990 | (tmp.baud_base != (SX_OSCFREQ + CD186x_TPC/2) / CD186x_TPC) || | |
1991 | (tmp.custom_divisor != 0) || | |
1992 | (tmp.xmit_fifo_size != CD186x_NFIFO) || | |
1993 | (tmp.flags & ~SPECIALIX_LEGAL_FLAGS)) { | |
1994 | func_exit(); | |
1995 | return -EINVAL; | |
1996 | } | |
d61780c0 | 1997 | #endif |
1da177e4 LT |
1998 | |
1999 | change_speed = ((port->flags & ASYNC_SPD_MASK) != | |
2000 | (tmp.flags & ASYNC_SPD_MASK)); | |
2001 | change_speed |= (tmp.custom_divisor != port->custom_divisor); | |
d61780c0 | 2002 | |
1da177e4 LT |
2003 | if (!capable(CAP_SYS_ADMIN)) { |
2004 | if ((tmp.close_delay != port->close_delay) || | |
2005 | (tmp.closing_wait != port->closing_wait) || | |
2006 | ((tmp.flags & ~ASYNC_USR_MASK) != | |
2007 | (port->flags & ~ASYNC_USR_MASK))) { | |
2008 | func_exit(); | |
2009 | return -EPERM; | |
2010 | } | |
2011 | port->flags = ((port->flags & ~ASYNC_USR_MASK) | | |
2012 | (tmp.flags & ASYNC_USR_MASK)); | |
2013 | port->custom_divisor = tmp.custom_divisor; | |
2014 | } else { | |
2015 | port->flags = ((port->flags & ~ASYNC_FLAGS) | | |
2016 | (tmp.flags & ASYNC_FLAGS)); | |
2017 | port->close_delay = tmp.close_delay; | |
2018 | port->closing_wait = tmp.closing_wait; | |
2019 | port->custom_divisor = tmp.custom_divisor; | |
2020 | } | |
2021 | if (change_speed) { | |
2022 | sx_change_speed(bp, port); | |
2023 | } | |
2024 | func_exit(); | |
2025 | return 0; | |
2026 | } | |
2027 | ||
2028 | ||
2029 | static inline int sx_get_serial_info(struct specialix_port * port, | |
2030 | struct serial_struct __user *retinfo) | |
2031 | { | |
2032 | struct serial_struct tmp; | |
2033 | struct specialix_board *bp = port_Board(port); | |
d61780c0 | 2034 | |
1da177e4 LT |
2035 | func_enter(); |
2036 | ||
2037 | /* | |
e49332bd JJ |
2038 | if (!access_ok(VERIFY_WRITE, (void *) retinfo, sizeof(tmp))) |
2039 | return -EFAULT; | |
1da177e4 LT |
2040 | */ |
2041 | ||
2042 | memset(&tmp, 0, sizeof(tmp)); | |
2043 | tmp.type = PORT_CIRRUS; | |
2044 | tmp.line = port - sx_port; | |
2045 | tmp.port = bp->base; | |
2046 | tmp.irq = bp->irq; | |
2047 | tmp.flags = port->flags; | |
2048 | tmp.baud_base = (SX_OSCFREQ + CD186x_TPC/2) / CD186x_TPC; | |
2049 | tmp.close_delay = port->close_delay * HZ/100; | |
2050 | tmp.closing_wait = port->closing_wait * HZ/100; | |
2051 | tmp.custom_divisor = port->custom_divisor; | |
2052 | tmp.xmit_fifo_size = CD186x_NFIFO; | |
2053 | if (copy_to_user(retinfo, &tmp, sizeof(tmp))) { | |
2054 | func_exit(); | |
2055 | return -EFAULT; | |
2056 | } | |
2057 | ||
2058 | func_exit(); | |
2059 | return 0; | |
2060 | } | |
2061 | ||
2062 | ||
d61780c0 | 2063 | static int sx_ioctl(struct tty_struct * tty, struct file * filp, |
1da177e4 LT |
2064 | unsigned int cmd, unsigned long arg) |
2065 | { | |
2066 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; | |
2067 | int retval; | |
2068 | void __user *argp = (void __user *)arg; | |
2069 | ||
2070 | func_enter(); | |
2071 | ||
2072 | if (sx_paranoia_check(port, tty->name, "sx_ioctl")) { | |
2073 | func_exit(); | |
2074 | return -ENODEV; | |
2075 | } | |
d61780c0 | 2076 | |
1da177e4 LT |
2077 | switch (cmd) { |
2078 | case TCSBRK: /* SVID version: non-zero arg --> no break */ | |
2079 | retval = tty_check_change(tty); | |
2080 | if (retval) { | |
2081 | func_exit(); | |
2082 | return retval; | |
2083 | } | |
2084 | tty_wait_until_sent(tty, 0); | |
2085 | if (!arg) | |
2086 | sx_send_break(port, HZ/4); /* 1/4 second */ | |
2087 | return 0; | |
2088 | case TCSBRKP: /* support for POSIX tcsendbreak() */ | |
2089 | retval = tty_check_change(tty); | |
2090 | if (retval) { | |
2091 | func_exit(); | |
2092 | return retval; | |
2093 | } | |
2094 | tty_wait_until_sent(tty, 0); | |
2095 | sx_send_break(port, arg ? arg*(HZ/10) : HZ/4); | |
2096 | func_exit(); | |
2097 | return 0; | |
2098 | case TIOCGSOFTCAR: | |
2099 | if (put_user(C_CLOCAL(tty)?1:0, (unsigned long __user *)argp)) { | |
2100 | func_exit(); | |
2101 | return -EFAULT; | |
2102 | } | |
2103 | func_exit(); | |
2104 | return 0; | |
2105 | case TIOCSSOFTCAR: | |
2106 | if (get_user(arg, (unsigned long __user *) argp)) { | |
2107 | func_exit(); | |
2108 | return -EFAULT; | |
2109 | } | |
2110 | tty->termios->c_cflag = | |
2111 | ((tty->termios->c_cflag & ~CLOCAL) | | |
2112 | (arg ? CLOCAL : 0)); | |
2113 | func_exit(); | |
2114 | return 0; | |
2115 | case TIOCGSERIAL: | |
2116 | func_exit(); | |
2117 | return sx_get_serial_info(port, argp); | |
d61780c0 | 2118 | case TIOCSSERIAL: |
1da177e4 LT |
2119 | func_exit(); |
2120 | return sx_set_serial_info(port, argp); | |
2121 | default: | |
2122 | func_exit(); | |
2123 | return -ENOIOCTLCMD; | |
2124 | } | |
2125 | func_exit(); | |
2126 | return 0; | |
2127 | } | |
2128 | ||
2129 | ||
2130 | static void sx_throttle(struct tty_struct * tty) | |
2131 | { | |
2132 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; | |
2133 | struct specialix_board *bp; | |
2134 | unsigned long flags; | |
2135 | ||
2136 | func_enter(); | |
2137 | ||
2138 | if (sx_paranoia_check(port, tty->name, "sx_throttle")) { | |
2139 | func_exit(); | |
2140 | return; | |
2141 | } | |
d61780c0 | 2142 | |
1da177e4 | 2143 | bp = port_Board(port); |
d61780c0 | 2144 | |
1da177e4 | 2145 | /* Use DTR instead of RTS ! */ |
d61780c0 | 2146 | if (SX_CRTSCTS (tty)) |
1da177e4 LT |
2147 | port->MSVR &= ~MSVR_DTR; |
2148 | else { | |
2149 | /* Auch!!! I think the system shouldn't call this then. */ | |
2150 | /* Or maybe we're supposed (allowed?) to do our side of hw | |
d61780c0 | 2151 | handshake anyway, even when hardware handshake is off. |
1da177e4 LT |
2152 | When you see this in your logs, please report.... */ |
2153 | printk (KERN_ERR "sx%d: Need to throttle, but can't (hardware hs is off)\n", | |
2154 | port_No (port)); | |
2155 | } | |
2156 | spin_lock_irqsave(&bp->lock, flags); | |
2157 | sx_out(bp, CD186x_CAR, port_No(port)); | |
2158 | spin_unlock_irqrestore(&bp->lock, flags); | |
2159 | if (I_IXOFF(tty)) { | |
2160 | spin_unlock_irqrestore(&bp->lock, flags); | |
2161 | sx_wait_CCR(bp); | |
2162 | spin_lock_irqsave(&bp->lock, flags); | |
2163 | sx_out(bp, CD186x_CCR, CCR_SSCH2); | |
2164 | spin_unlock_irqrestore(&bp->lock, flags); | |
2165 | sx_wait_CCR(bp); | |
2166 | } | |
2167 | spin_lock_irqsave(&bp->lock, flags); | |
2168 | sx_out(bp, CD186x_MSVR, port->MSVR); | |
2169 | spin_unlock_irqrestore(&bp->lock, flags); | |
2170 | ||
2171 | func_exit(); | |
2172 | } | |
2173 | ||
2174 | ||
2175 | static void sx_unthrottle(struct tty_struct * tty) | |
2176 | { | |
2177 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; | |
2178 | struct specialix_board *bp; | |
2179 | unsigned long flags; | |
2180 | ||
2181 | func_enter(); | |
d61780c0 | 2182 | |
1da177e4 LT |
2183 | if (sx_paranoia_check(port, tty->name, "sx_unthrottle")) { |
2184 | func_exit(); | |
2185 | return; | |
2186 | } | |
d61780c0 | 2187 | |
1da177e4 | 2188 | bp = port_Board(port); |
d61780c0 | 2189 | |
1da177e4 LT |
2190 | spin_lock_irqsave(&port->lock, flags); |
2191 | /* XXXX Use DTR INSTEAD???? */ | |
2192 | if (SX_CRTSCTS(tty)) { | |
2193 | port->MSVR |= MSVR_DTR; | |
2194 | } /* Else clause: see remark in "sx_throttle"... */ | |
2195 | spin_lock_irqsave(&bp->lock, flags); | |
2196 | sx_out(bp, CD186x_CAR, port_No(port)); | |
2197 | spin_unlock_irqrestore(&bp->lock, flags); | |
2198 | if (I_IXOFF(tty)) { | |
2199 | spin_unlock_irqrestore(&port->lock, flags); | |
2200 | sx_wait_CCR(bp); | |
2201 | spin_lock_irqsave(&bp->lock, flags); | |
2202 | sx_out(bp, CD186x_CCR, CCR_SSCH1); | |
2203 | spin_unlock_irqrestore(&bp->lock, flags); | |
2204 | sx_wait_CCR(bp); | |
2205 | spin_lock_irqsave(&port->lock, flags); | |
2206 | } | |
2207 | spin_lock_irqsave(&bp->lock, flags); | |
2208 | sx_out(bp, CD186x_MSVR, port->MSVR); | |
2209 | spin_unlock_irqrestore(&bp->lock, flags); | |
2210 | spin_unlock_irqrestore(&port->lock, flags); | |
2211 | ||
2212 | func_exit(); | |
2213 | } | |
2214 | ||
2215 | ||
2216 | static void sx_stop(struct tty_struct * tty) | |
2217 | { | |
2218 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; | |
2219 | struct specialix_board *bp; | |
2220 | unsigned long flags; | |
2221 | ||
2222 | func_enter(); | |
d61780c0 | 2223 | |
1da177e4 LT |
2224 | if (sx_paranoia_check(port, tty->name, "sx_stop")) { |
2225 | func_exit(); | |
2226 | return; | |
2227 | } | |
2228 | ||
2229 | bp = port_Board(port); | |
d61780c0 | 2230 | |
1da177e4 LT |
2231 | spin_lock_irqsave(&port->lock, flags); |
2232 | port->IER &= ~IER_TXRDY; | |
2233 | spin_lock_irqsave(&bp->lock, flags); | |
2234 | sx_out(bp, CD186x_CAR, port_No(port)); | |
2235 | sx_out(bp, CD186x_IER, port->IER); | |
2236 | spin_unlock_irqrestore(&bp->lock, flags); | |
2237 | spin_unlock_irqrestore(&port->lock, flags); | |
2238 | ||
2239 | func_exit(); | |
2240 | } | |
2241 | ||
2242 | ||
2243 | static void sx_start(struct tty_struct * tty) | |
2244 | { | |
2245 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; | |
2246 | struct specialix_board *bp; | |
2247 | unsigned long flags; | |
2248 | ||
2249 | func_enter(); | |
d61780c0 | 2250 | |
1da177e4 LT |
2251 | if (sx_paranoia_check(port, tty->name, "sx_start")) { |
2252 | func_exit(); | |
2253 | return; | |
2254 | } | |
d61780c0 | 2255 | |
1da177e4 | 2256 | bp = port_Board(port); |
d61780c0 | 2257 | |
1da177e4 LT |
2258 | spin_lock_irqsave(&port->lock, flags); |
2259 | if (port->xmit_cnt && port->xmit_buf && !(port->IER & IER_TXRDY)) { | |
2260 | port->IER |= IER_TXRDY; | |
2261 | spin_lock_irqsave(&bp->lock, flags); | |
2262 | sx_out(bp, CD186x_CAR, port_No(port)); | |
2263 | sx_out(bp, CD186x_IER, port->IER); | |
2264 | spin_unlock_irqrestore(&bp->lock, flags); | |
2265 | } | |
2266 | spin_unlock_irqrestore(&port->lock, flags); | |
2267 | ||
2268 | func_exit(); | |
2269 | } | |
2270 | ||
2271 | ||
2272 | /* | |
2273 | * This routine is called from the work-queue when the interrupt | |
2274 | * routine has signalled that a hangup has occurred. The path of | |
2275 | * hangup processing is: | |
2276 | * | |
2277 | * serial interrupt routine -> (workqueue) -> | |
2278 | * do_sx_hangup() -> tty->hangup() -> sx_hangup() | |
d61780c0 | 2279 | * |
1da177e4 LT |
2280 | */ |
2281 | static void do_sx_hangup(void *private_) | |
2282 | { | |
2283 | struct specialix_port *port = (struct specialix_port *) private_; | |
2284 | struct tty_struct *tty; | |
d61780c0 | 2285 | |
1da177e4 LT |
2286 | func_enter(); |
2287 | ||
2288 | tty = port->tty; | |
2289 | if (tty) | |
2290 | tty_hangup(tty); /* FIXME: module removal race here */ | |
2291 | ||
2292 | func_exit(); | |
2293 | } | |
2294 | ||
2295 | ||
2296 | static void sx_hangup(struct tty_struct * tty) | |
2297 | { | |
2298 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; | |
2299 | struct specialix_board *bp; | |
2300 | unsigned long flags; | |
2301 | ||
2302 | func_enter(); | |
2303 | ||
2304 | if (sx_paranoia_check(port, tty->name, "sx_hangup")) { | |
2305 | func_exit(); | |
2306 | return; | |
2307 | } | |
d61780c0 | 2308 | |
1da177e4 | 2309 | bp = port_Board(port); |
d61780c0 | 2310 | |
1da177e4 LT |
2311 | sx_shutdown_port(bp, port); |
2312 | spin_lock_irqsave(&port->lock, flags); | |
2313 | port->event = 0; | |
2314 | bp->count -= port->count; | |
2315 | if (bp->count < 0) { | |
2316 | printk(KERN_ERR "sx%d: sx_hangup: bad board count: %d port: %d\n", | |
2317 | board_No(bp), bp->count, tty->index); | |
2318 | bp->count = 0; | |
2319 | } | |
2320 | port->count = 0; | |
2321 | port->flags &= ~ASYNC_NORMAL_ACTIVE; | |
2322 | port->tty = NULL; | |
2323 | spin_unlock_irqrestore(&port->lock, flags); | |
2324 | wake_up_interruptible(&port->open_wait); | |
2325 | ||
2326 | func_exit(); | |
2327 | } | |
2328 | ||
2329 | ||
2330 | static void sx_set_termios(struct tty_struct * tty, struct termios * old_termios) | |
2331 | { | |
2332 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; | |
2333 | unsigned long flags; | |
2334 | struct specialix_board * bp; | |
d61780c0 | 2335 | |
1da177e4 LT |
2336 | if (sx_paranoia_check(port, tty->name, "sx_set_termios")) |
2337 | return; | |
d61780c0 | 2338 | |
1da177e4 LT |
2339 | if (tty->termios->c_cflag == old_termios->c_cflag && |
2340 | tty->termios->c_iflag == old_termios->c_iflag) | |
2341 | return; | |
2342 | ||
2343 | bp = port_Board(port); | |
2344 | spin_lock_irqsave(&port->lock, flags); | |
2345 | sx_change_speed(port_Board(port), port); | |
2346 | spin_unlock_irqrestore(&port->lock, flags); | |
2347 | ||
2348 | if ((old_termios->c_cflag & CRTSCTS) && | |
2349 | !(tty->termios->c_cflag & CRTSCTS)) { | |
2350 | tty->hw_stopped = 0; | |
2351 | sx_start(tty); | |
2352 | } | |
2353 | } | |
2354 | ||
2355 | ||
2356 | static void do_softint(void *private_) | |
2357 | { | |
2358 | struct specialix_port *port = (struct specialix_port *) private_; | |
2359 | struct tty_struct *tty; | |
2360 | ||
2361 | func_enter(); | |
2362 | ||
2363 | if(!(tty = port->tty)) { | |
2364 | func_exit(); | |
2365 | return; | |
2366 | } | |
2367 | ||
2368 | if (test_and_clear_bit(RS_EVENT_WRITE_WAKEUP, &port->event)) { | |
2369 | tty_wakeup(tty); | |
2370 | //wake_up_interruptible(&tty->write_wait); | |
2371 | } | |
2372 | ||
2373 | func_exit(); | |
2374 | } | |
2375 | ||
2376 | static struct tty_operations sx_ops = { | |
2377 | .open = sx_open, | |
2378 | .close = sx_close, | |
2379 | .write = sx_write, | |
2380 | .put_char = sx_put_char, | |
2381 | .flush_chars = sx_flush_chars, | |
2382 | .write_room = sx_write_room, | |
2383 | .chars_in_buffer = sx_chars_in_buffer, | |
2384 | .flush_buffer = sx_flush_buffer, | |
2385 | .ioctl = sx_ioctl, | |
2386 | .throttle = sx_throttle, | |
2387 | .unthrottle = sx_unthrottle, | |
2388 | .set_termios = sx_set_termios, | |
2389 | .stop = sx_stop, | |
2390 | .start = sx_start, | |
2391 | .hangup = sx_hangup, | |
2392 | .tiocmget = sx_tiocmget, | |
2393 | .tiocmset = sx_tiocmset, | |
2394 | }; | |
2395 | ||
2396 | static int sx_init_drivers(void) | |
2397 | { | |
2398 | int error; | |
2399 | int i; | |
2400 | ||
2401 | func_enter(); | |
2402 | ||
2403 | specialix_driver = alloc_tty_driver(SX_NBOARD * SX_NPORT); | |
2404 | if (!specialix_driver) { | |
2405 | printk(KERN_ERR "sx: Couldn't allocate tty_driver.\n"); | |
2406 | func_exit(); | |
2407 | return 1; | |
2408 | } | |
d61780c0 | 2409 | |
1da177e4 LT |
2410 | if (!(tmp_buf = (unsigned char *) get_zeroed_page(GFP_KERNEL))) { |
2411 | printk(KERN_ERR "sx: Couldn't get free page.\n"); | |
2412 | put_tty_driver(specialix_driver); | |
2413 | func_exit(); | |
2414 | return 1; | |
2415 | } | |
2416 | specialix_driver->owner = THIS_MODULE; | |
2417 | specialix_driver->name = "ttyW"; | |
2418 | specialix_driver->major = SPECIALIX_NORMAL_MAJOR; | |
2419 | specialix_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
2420 | specialix_driver->subtype = SERIAL_TYPE_NORMAL; | |
2421 | specialix_driver->init_termios = tty_std_termios; | |
2422 | specialix_driver->init_termios.c_cflag = | |
2423 | B9600 | CS8 | CREAD | HUPCL | CLOCAL; | |
2424 | specialix_driver->flags = TTY_DRIVER_REAL_RAW; | |
2425 | tty_set_operations(specialix_driver, &sx_ops); | |
2426 | ||
2427 | if ((error = tty_register_driver(specialix_driver))) { | |
2428 | put_tty_driver(specialix_driver); | |
2429 | free_page((unsigned long)tmp_buf); | |
2430 | printk(KERN_ERR "sx: Couldn't register specialix IO8+ driver, error = %d\n", | |
2431 | error); | |
2432 | func_exit(); | |
2433 | return 1; | |
2434 | } | |
2435 | memset(sx_port, 0, sizeof(sx_port)); | |
2436 | for (i = 0; i < SX_NPORT * SX_NBOARD; i++) { | |
2437 | sx_port[i].magic = SPECIALIX_MAGIC; | |
2438 | INIT_WORK(&sx_port[i].tqueue, do_softint, &sx_port[i]); | |
2439 | INIT_WORK(&sx_port[i].tqueue_hangup, do_sx_hangup, &sx_port[i]); | |
2440 | sx_port[i].close_delay = 50 * HZ/100; | |
2441 | sx_port[i].closing_wait = 3000 * HZ/100; | |
2442 | init_waitqueue_head(&sx_port[i].open_wait); | |
2443 | init_waitqueue_head(&sx_port[i].close_wait); | |
2444 | spin_lock_init(&sx_port[i].lock); | |
2445 | } | |
d61780c0 | 2446 | |
1da177e4 LT |
2447 | func_exit(); |
2448 | return 0; | |
2449 | } | |
2450 | ||
2451 | static void sx_release_drivers(void) | |
2452 | { | |
2453 | func_enter(); | |
2454 | ||
2455 | free_page((unsigned long)tmp_buf); | |
2456 | tty_unregister_driver(specialix_driver); | |
2457 | put_tty_driver(specialix_driver); | |
2458 | func_exit(); | |
2459 | } | |
2460 | ||
d61780c0 JG |
2461 | /* |
2462 | * This routine must be called by kernel at boot time | |
1da177e4 LT |
2463 | */ |
2464 | static int __init specialix_init(void) | |
2465 | { | |
2466 | int i; | |
2467 | int found = 0; | |
2468 | ||
2469 | func_enter(); | |
2470 | ||
2471 | printk(KERN_INFO "sx: Specialix IO8+ driver v" VERSION ", (c) R.E.Wolff 1997/1998.\n"); | |
2472 | printk(KERN_INFO "sx: derived from work (c) D.Gorodchanin 1994-1996.\n"); | |
2473 | #ifdef CONFIG_SPECIALIX_RTSCTS | |
2474 | printk (KERN_INFO "sx: DTR/RTS pin is always RTS.\n"); | |
2475 | #else | |
2476 | printk (KERN_INFO "sx: DTR/RTS pin is RTS when CRTSCTS is on.\n"); | |
2477 | #endif | |
d61780c0 | 2478 | |
1da177e4 | 2479 | for (i = 0; i < SX_NBOARD; i++) |
34af946a | 2480 | spin_lock_init(&sx_board[i].lock); |
1da177e4 LT |
2481 | |
2482 | if (sx_init_drivers()) { | |
2483 | func_exit(); | |
2484 | return -EIO; | |
2485 | } | |
2486 | ||
d61780c0 | 2487 | for (i = 0; i < SX_NBOARD; i++) |
1da177e4 LT |
2488 | if (sx_board[i].base && !sx_probe(&sx_board[i])) |
2489 | found++; | |
2490 | ||
2491 | #ifdef CONFIG_PCI | |
2492 | { | |
2493 | struct pci_dev *pdev = NULL; | |
2494 | ||
2495 | i=0; | |
2496 | while (i < SX_NBOARD) { | |
2497 | if (sx_board[i].flags & SX_BOARD_PRESENT) { | |
2498 | i++; | |
2499 | continue; | |
2500 | } | |
d61780c0 JG |
2501 | pdev = pci_find_device (PCI_VENDOR_ID_SPECIALIX, |
2502 | PCI_DEVICE_ID_SPECIALIX_IO8, | |
1da177e4 LT |
2503 | pdev); |
2504 | if (!pdev) break; | |
2505 | ||
2506 | if (pci_enable_device(pdev)) | |
2507 | continue; | |
2508 | ||
2509 | sx_board[i].irq = pdev->irq; | |
2510 | ||
2511 | sx_board[i].base = pci_resource_start (pdev, 2); | |
2512 | ||
2513 | sx_board[i].flags |= SX_BOARD_IS_PCI; | |
2514 | if (!sx_probe(&sx_board[i])) | |
2515 | found ++; | |
2516 | } | |
2517 | } | |
2518 | #endif | |
2519 | ||
2520 | if (!found) { | |
2521 | sx_release_drivers(); | |
2522 | printk(KERN_INFO "sx: No specialix IO8+ boards detected.\n"); | |
2523 | func_exit(); | |
2524 | return -EIO; | |
2525 | } | |
2526 | ||
2527 | func_exit(); | |
2528 | return 0; | |
2529 | } | |
2530 | ||
2531 | static int iobase[SX_NBOARD] = {0,}; | |
2532 | ||
2533 | static int irq [SX_NBOARD] = {0,}; | |
2534 | ||
2535 | module_param_array(iobase, int, NULL, 0); | |
2536 | module_param_array(irq, int, NULL, 0); | |
2537 | module_param(sx_debug, int, 0); | |
2538 | module_param(sx_rxfifo, int, 0); | |
2539 | #ifdef SPECIALIX_TIMER | |
2540 | module_param(sx_poll, int, 0); | |
2541 | #endif | |
2542 | ||
2543 | /* | |
2544 | * You can setup up to 4 boards. | |
2545 | * by specifying "iobase=0xXXX,0xXXX ..." as insmod parameter. | |
d61780c0 JG |
2546 | * You should specify the IRQs too in that case "irq=....,...". |
2547 | * | |
1da177e4 | 2548 | * More than 4 boards in one computer is not possible, as the card can |
d61780c0 | 2549 | * only use 4 different interrupts. |
1da177e4 LT |
2550 | * |
2551 | */ | |
2552 | static int __init specialix_init_module(void) | |
2553 | { | |
2554 | int i; | |
2555 | ||
2556 | func_enter(); | |
2557 | ||
1da177e4 LT |
2558 | if (iobase[0] || iobase[1] || iobase[2] || iobase[3]) { |
2559 | for(i = 0; i < SX_NBOARD; i++) { | |
2560 | sx_board[i].base = iobase[i]; | |
2561 | sx_board[i].irq = irq[i]; | |
2562 | sx_board[i].count= 0; | |
2563 | } | |
2564 | } | |
2565 | ||
2566 | func_exit(); | |
2567 | ||
2568 | return specialix_init(); | |
2569 | } | |
d61780c0 | 2570 | |
1da177e4 LT |
2571 | static void __exit specialix_exit_module(void) |
2572 | { | |
2573 | int i; | |
d61780c0 | 2574 | |
1da177e4 LT |
2575 | func_enter(); |
2576 | ||
2577 | sx_release_drivers(); | |
2578 | for (i = 0; i < SX_NBOARD; i++) | |
d61780c0 | 2579 | if (sx_board[i].flags & SX_BOARD_PRESENT) |
1da177e4 LT |
2580 | sx_release_io_range(&sx_board[i]); |
2581 | #ifdef SPECIALIX_TIMER | |
2582 | del_timer (&missed_irq_timer); | |
2583 | #endif | |
2584 | ||
2585 | func_exit(); | |
2586 | } | |
2587 | ||
2588 | module_init(specialix_init_module); | |
2589 | module_exit(specialix_exit_module); | |
2590 | ||
2591 | MODULE_LICENSE("GPL"); |