Commit | Line | Data |
---|---|---|
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 | ||
1da177e4 LT |
78 | #include <linux/module.h> |
79 | ||
80 | #include <asm/io.h> | |
81 | #include <linux/kernel.h> | |
82 | #include <linux/sched.h> | |
83 | #include <linux/ioport.h> | |
84 | #include <linux/interrupt.h> | |
85 | #include <linux/errno.h> | |
86 | #include <linux/tty.h> | |
33f0f88f | 87 | #include <linux/tty_flip.h> |
1da177e4 LT |
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> | |
1da177e4 LT |
93 | #include <linux/pci.h> |
94 | #include <linux/init.h> | |
95 | #include <asm/uaccess.h> | |
96 | ||
97 | #include "specialix_io8.h" | |
98 | #include "cd1865.h" | |
99 | ||
100 | ||
101 | /* | |
102 | This driver can spew a whole lot of debugging output at you. If you | |
103 | need maximum performance, you should disable the DEBUG define. To | |
104 | aid in debugging in the field, I'm leaving the compile-time debug | |
105 | features enabled, and disable them "runtime". That allows me to | |
106 | instruct people with problems to enable debugging without requiring | |
107 | them to recompile... | |
108 | */ | |
109 | #define DEBUG | |
110 | ||
111 | static int sx_debug; | |
112 | static int sx_rxfifo = SPECIALIX_RXFIFO; | |
113 | ||
114 | #ifdef DEBUG | |
115 | #define dprintk(f, str...) if (sx_debug & f) printk (str) | |
116 | #else | |
117 | #define dprintk(f, str...) /* nothing */ | |
118 | #endif | |
119 | ||
120 | #define SX_DEBUG_FLOW 0x0001 | |
121 | #define SX_DEBUG_DATA 0x0002 | |
122 | #define SX_DEBUG_PROBE 0x0004 | |
123 | #define SX_DEBUG_CHAN 0x0008 | |
124 | #define SX_DEBUG_INIT 0x0010 | |
125 | #define SX_DEBUG_RX 0x0020 | |
126 | #define SX_DEBUG_TX 0x0040 | |
127 | #define SX_DEBUG_IRQ 0x0080 | |
128 | #define SX_DEBUG_OPEN 0x0100 | |
129 | #define SX_DEBUG_TERMIOS 0x0200 | |
130 | #define SX_DEBUG_SIGNALS 0x0400 | |
131 | #define SX_DEBUG_FIFO 0x0800 | |
132 | ||
133 | ||
134 | #define func_enter() dprintk (SX_DEBUG_FLOW, "io8: enter %s\n",__FUNCTION__) | |
135 | #define func_exit() dprintk (SX_DEBUG_FLOW, "io8: exit %s\n", __FUNCTION__) | |
136 | ||
137 | #define jiffies_from_ms(a) ((((a) * HZ)/1000)+1) | |
138 | ||
139 | ||
140 | /* Configurable options: */ | |
141 | ||
142 | /* Am I paranoid or not ? ;-) */ | |
143 | #define SPECIALIX_PARANOIA_CHECK | |
144 | ||
145 | /* Do I trust the IRQ from the card? (enabeling it doesn't seem to help) | |
146 | When the IRQ routine leaves the chip in a state that is keeps on | |
147 | requiring attention, the timer doesn't help either. */ | |
148 | #undef SPECIALIX_TIMER | |
149 | ||
150 | #ifdef SPECIALIX_TIMER | |
151 | static int sx_poll = HZ; | |
152 | #endif | |
153 | ||
154 | ||
155 | ||
d61780c0 | 156 | /* |
1da177e4 LT |
157 | * The following defines are mostly for testing purposes. But if you need |
158 | * some nice reporting in your syslog, you can define them also. | |
159 | */ | |
160 | #undef SX_REPORT_FIFO | |
161 | #undef SX_REPORT_OVERRUN | |
162 | ||
163 | ||
164 | ||
165 | #ifdef CONFIG_SPECIALIX_RTSCTS | |
166 | #define SX_CRTSCTS(bla) 1 | |
167 | #else | |
168 | #define SX_CRTSCTS(tty) C_CRTSCTS(tty) | |
169 | #endif | |
170 | ||
171 | ||
172 | /* Used to be outb (0xff, 0x80); */ | |
173 | #define short_pause() udelay (1) | |
174 | ||
175 | ||
176 | #define SPECIALIX_LEGAL_FLAGS \ | |
177 | (ASYNC_HUP_NOTIFY | ASYNC_SAK | ASYNC_SPLIT_TERMIOS | \ | |
178 | ASYNC_SPD_HI | ASYNC_SPEED_VHI | ASYNC_SESSION_LOCKOUT | \ | |
179 | ASYNC_PGRP_LOCKOUT | ASYNC_CALLOUT_NOHUP) | |
180 | ||
181 | #undef RS_EVENT_WRITE_WAKEUP | |
182 | #define RS_EVENT_WRITE_WAKEUP 0 | |
183 | ||
184 | static struct tty_driver *specialix_driver; | |
1da177e4 | 185 | |
1da177e4 LT |
186 | static struct specialix_board sx_board[SX_NBOARD] = { |
187 | { 0, SX_IOBASE1, 9, }, | |
188 | { 0, SX_IOBASE2, 11, }, | |
189 | { 0, SX_IOBASE3, 12, }, | |
190 | { 0, SX_IOBASE4, 15, }, | |
191 | }; | |
192 | ||
193 | static struct specialix_port sx_port[SX_NBOARD * SX_NPORT]; | |
194 | ||
195 | ||
196 | #ifdef SPECIALIX_TIMER | |
197 | static struct timer_list missed_irq_timer; | |
7d12e780 | 198 | static irqreturn_t sx_interrupt(int irq, void * dev_id); |
1da177e4 LT |
199 | #endif |
200 | ||
201 | ||
202 | ||
203 | static inline int sx_paranoia_check(struct specialix_port const * port, | |
204 | char *name, const char *routine) | |
205 | { | |
206 | #ifdef SPECIALIX_PARANOIA_CHECK | |
207 | static const char *badmagic = | |
208 | KERN_ERR "sx: Warning: bad specialix port magic number for device %s in %s\n"; | |
209 | static const char *badinfo = | |
210 | KERN_ERR "sx: Warning: null specialix port for device %s in %s\n"; | |
d61780c0 | 211 | |
1da177e4 LT |
212 | if (!port) { |
213 | printk(badinfo, name, routine); | |
214 | return 1; | |
215 | } | |
216 | if (port->magic != SPECIALIX_MAGIC) { | |
217 | printk(badmagic, name, routine); | |
218 | return 1; | |
219 | } | |
220 | #endif | |
221 | return 0; | |
222 | } | |
223 | ||
224 | ||
225 | /* | |
d61780c0 | 226 | * |
1da177e4 | 227 | * Service functions for specialix IO8+ driver. |
d61780c0 | 228 | * |
1da177e4 LT |
229 | */ |
230 | ||
231 | /* Get board number from pointer */ | |
232 | static inline int board_No (struct specialix_board * bp) | |
233 | { | |
234 | return bp - sx_board; | |
235 | } | |
236 | ||
237 | ||
238 | /* Get port number from pointer */ | |
239 | static inline int port_No (struct specialix_port const * port) | |
240 | { | |
d61780c0 | 241 | return SX_PORT(port - sx_port); |
1da177e4 LT |
242 | } |
243 | ||
244 | ||
245 | /* Get pointer to board from pointer to port */ | |
246 | static inline struct specialix_board * port_Board(struct specialix_port const * port) | |
247 | { | |
248 | return &sx_board[SX_BOARD(port - sx_port)]; | |
249 | } | |
250 | ||
251 | ||
252 | /* Input Byte from CL CD186x register */ | |
253 | static inline unsigned char sx_in(struct specialix_board * bp, unsigned short reg) | |
254 | { | |
255 | bp->reg = reg | 0x80; | |
256 | outb (reg | 0x80, bp->base + SX_ADDR_REG); | |
257 | return inb (bp->base + SX_DATA_REG); | |
258 | } | |
259 | ||
260 | ||
261 | /* Output Byte to CL CD186x register */ | |
262 | static inline void sx_out(struct specialix_board * bp, unsigned short reg, | |
263 | unsigned char val) | |
264 | { | |
265 | bp->reg = reg | 0x80; | |
266 | outb (reg | 0x80, bp->base + SX_ADDR_REG); | |
267 | outb (val, bp->base + SX_DATA_REG); | |
268 | } | |
269 | ||
270 | ||
271 | /* Input Byte from CL CD186x register */ | |
272 | static inline unsigned char sx_in_off(struct specialix_board * bp, unsigned short reg) | |
273 | { | |
274 | bp->reg = reg; | |
275 | outb (reg, bp->base + SX_ADDR_REG); | |
276 | return inb (bp->base + SX_DATA_REG); | |
277 | } | |
278 | ||
279 | ||
280 | /* Output Byte to CL CD186x register */ | |
281 | static inline void sx_out_off(struct specialix_board * bp, unsigned short reg, | |
282 | unsigned char val) | |
283 | { | |
284 | bp->reg = reg; | |
285 | outb (reg, bp->base + SX_ADDR_REG); | |
286 | outb (val, bp->base + SX_DATA_REG); | |
287 | } | |
288 | ||
289 | ||
290 | /* Wait for Channel Command Register ready */ | |
291 | static inline void sx_wait_CCR(struct specialix_board * bp) | |
292 | { | |
293 | unsigned long delay, flags; | |
294 | unsigned char ccr; | |
295 | ||
296 | for (delay = SX_CCR_TIMEOUT; delay; delay--) { | |
297 | spin_lock_irqsave(&bp->lock, flags); | |
298 | ccr = sx_in(bp, CD186x_CCR); | |
299 | spin_unlock_irqrestore(&bp->lock, flags); | |
300 | if (!ccr) | |
301 | return; | |
302 | udelay (1); | |
303 | } | |
d61780c0 | 304 | |
1da177e4 LT |
305 | printk(KERN_ERR "sx%d: Timeout waiting for CCR.\n", board_No(bp)); |
306 | } | |
307 | ||
308 | ||
309 | /* Wait for Channel Command Register ready */ | |
310 | static inline void sx_wait_CCR_off(struct specialix_board * bp) | |
311 | { | |
312 | unsigned long delay; | |
313 | unsigned char crr; | |
314 | unsigned long flags; | |
315 | ||
316 | for (delay = SX_CCR_TIMEOUT; delay; delay--) { | |
317 | spin_lock_irqsave(&bp->lock, flags); | |
318 | crr = sx_in_off(bp, CD186x_CCR); | |
319 | spin_unlock_irqrestore(&bp->lock, flags); | |
320 | if (!crr) | |
321 | return; | |
322 | udelay (1); | |
323 | } | |
d61780c0 | 324 | |
1da177e4 LT |
325 | printk(KERN_ERR "sx%d: Timeout waiting for CCR.\n", board_No(bp)); |
326 | } | |
327 | ||
328 | ||
329 | /* | |
330 | * specialix IO8+ IO range functions. | |
331 | */ | |
332 | ||
d61780c0 | 333 | static inline int sx_request_io_range(struct specialix_board * bp) |
1da177e4 | 334 | { |
d61780c0 JG |
335 | return request_region(bp->base, |
336 | bp->flags & SX_BOARD_IS_PCI ? SX_PCI_IO_SPACE : SX_IO_SPACE, | |
337 | "specialix IO8+") == NULL; | |
1da177e4 LT |
338 | } |
339 | ||
340 | ||
341 | static inline void sx_release_io_range(struct specialix_board * bp) | |
342 | { | |
d61780c0 | 343 | release_region(bp->base, |
1da177e4 LT |
344 | bp->flags&SX_BOARD_IS_PCI?SX_PCI_IO_SPACE:SX_IO_SPACE); |
345 | } | |
346 | ||
d61780c0 | 347 | |
1da177e4 | 348 | /* Must be called with enabled interrupts */ |
d61780c0 | 349 | /* Ugly. Very ugly. Don't use this for anything else than initialization |
1da177e4 LT |
350 | code */ |
351 | static inline void sx_long_delay(unsigned long delay) | |
352 | { | |
353 | unsigned long i; | |
d61780c0 | 354 | |
1da177e4 LT |
355 | for (i = jiffies + delay; time_after(i, jiffies); ) ; |
356 | } | |
357 | ||
358 | ||
359 | ||
360 | /* Set the IRQ using the RTS lines that run to the PAL on the board.... */ | |
361 | static int sx_set_irq ( struct specialix_board *bp) | |
362 | { | |
363 | int virq; | |
364 | int i; | |
365 | unsigned long flags; | |
366 | ||
d61780c0 | 367 | if (bp->flags & SX_BOARD_IS_PCI) |
1da177e4 LT |
368 | return 1; |
369 | switch (bp->irq) { | |
370 | /* In the same order as in the docs... */ | |
371 | case 15: virq = 0;break; | |
372 | case 12: virq = 1;break; | |
373 | case 11: virq = 2;break; | |
374 | case 9: virq = 3;break; | |
375 | default: printk (KERN_ERR "Speclialix: cannot set irq to %d.\n", bp->irq); | |
376 | return 0; | |
377 | } | |
378 | spin_lock_irqsave(&bp->lock, flags); | |
379 | for (i=0;i<2;i++) { | |
380 | sx_out(bp, CD186x_CAR, i); | |
381 | sx_out(bp, CD186x_MSVRTS, ((virq >> i) & 0x1)? MSVR_RTS:0); | |
382 | } | |
383 | spin_unlock_irqrestore(&bp->lock, flags); | |
384 | return 1; | |
385 | } | |
386 | ||
387 | ||
388 | /* Reset and setup CD186x chip */ | |
389 | static int sx_init_CD186x(struct specialix_board * bp) | |
390 | { | |
391 | unsigned long flags; | |
392 | int scaler; | |
393 | int rv = 1; | |
394 | ||
395 | func_enter(); | |
396 | sx_wait_CCR_off(bp); /* Wait for CCR ready */ | |
397 | spin_lock_irqsave(&bp->lock, flags); | |
398 | sx_out_off(bp, CD186x_CCR, CCR_HARDRESET); /* Reset CD186x chip */ | |
399 | spin_unlock_irqrestore(&bp->lock, flags); | |
400 | sx_long_delay(HZ/20); /* Delay 0.05 sec */ | |
401 | spin_lock_irqsave(&bp->lock, flags); | |
402 | sx_out_off(bp, CD186x_GIVR, SX_ID); /* Set ID for this chip */ | |
403 | sx_out_off(bp, CD186x_GICR, 0); /* Clear all bits */ | |
404 | sx_out_off(bp, CD186x_PILR1, SX_ACK_MINT); /* Prio for modem intr */ | |
405 | sx_out_off(bp, CD186x_PILR2, SX_ACK_TINT); /* Prio for transmitter intr */ | |
406 | sx_out_off(bp, CD186x_PILR3, SX_ACK_RINT); /* Prio for receiver intr */ | |
407 | /* Set RegAckEn */ | |
408 | sx_out_off(bp, CD186x_SRCR, sx_in (bp, CD186x_SRCR) | SRCR_REGACKEN); | |
d61780c0 | 409 | |
1da177e4 LT |
410 | /* Setting up prescaler. We need 4 ticks per 1 ms */ |
411 | scaler = SX_OSCFREQ/SPECIALIX_TPS; | |
412 | ||
413 | sx_out_off(bp, CD186x_PPRH, scaler >> 8); | |
414 | sx_out_off(bp, CD186x_PPRL, scaler & 0xff); | |
415 | spin_unlock_irqrestore(&bp->lock, flags); | |
416 | ||
417 | if (!sx_set_irq (bp)) { | |
418 | /* Figure out how to pass this along... */ | |
419 | printk (KERN_ERR "Cannot set irq to %d.\n", bp->irq); | |
420 | rv = 0; | |
421 | } | |
422 | ||
423 | func_exit(); | |
424 | return rv; | |
425 | } | |
426 | ||
427 | ||
428 | static int read_cross_byte (struct specialix_board *bp, int reg, int bit) | |
429 | { | |
430 | int i; | |
431 | int t; | |
432 | unsigned long flags; | |
433 | ||
434 | spin_lock_irqsave(&bp->lock, flags); | |
435 | for (i=0, t=0;i<8;i++) { | |
436 | sx_out_off (bp, CD186x_CAR, i); | |
d61780c0 | 437 | if (sx_in_off (bp, reg) & bit) |
1da177e4 LT |
438 | t |= 1 << i; |
439 | } | |
440 | spin_unlock_irqrestore(&bp->lock, flags); | |
441 | ||
442 | return t; | |
443 | } | |
444 | ||
445 | ||
446 | #ifdef SPECIALIX_TIMER | |
447 | void missed_irq (unsigned long data) | |
448 | { | |
449 | unsigned char irq; | |
450 | unsigned long flags; | |
451 | struct specialix_board *bp = (struct specialix_board *)data; | |
452 | ||
453 | spin_lock_irqsave(&bp->lock, flags); | |
454 | irq = sx_in ((struct specialix_board *)data, CD186x_SRSR) & | |
455 | (SRSR_RREQint | | |
456 | SRSR_TREQint | | |
457 | SRSR_MREQint); | |
458 | spin_unlock_irqrestore(&bp->lock, flags); | |
459 | if (irq) { | |
460 | printk (KERN_INFO "Missed interrupt... Calling int from timer. \n"); | |
d61780c0 | 461 | sx_interrupt (((struct specialix_board *)data)->irq, |
1da177e4 LT |
462 | (void*)data, NULL); |
463 | } | |
464 | missed_irq_timer.expires = jiffies + sx_poll; | |
465 | add_timer (&missed_irq_timer); | |
466 | } | |
467 | #endif | |
468 | ||
469 | ||
470 | ||
471 | /* Main probing routine, also sets irq. */ | |
472 | static int sx_probe(struct specialix_board *bp) | |
473 | { | |
474 | unsigned char val1, val2; | |
475 | #if 0 | |
476 | int irqs = 0; | |
477 | int retries; | |
478 | #endif | |
479 | int rev; | |
480 | int chip; | |
481 | ||
482 | func_enter(); | |
483 | ||
d61780c0 | 484 | if (sx_request_io_range(bp)) { |
1da177e4 LT |
485 | func_exit(); |
486 | return 1; | |
487 | } | |
488 | ||
489 | /* Are the I/O ports here ? */ | |
490 | sx_out_off(bp, CD186x_PPRL, 0x5a); | |
491 | short_pause (); | |
492 | val1 = sx_in_off(bp, CD186x_PPRL); | |
493 | ||
494 | sx_out_off(bp, CD186x_PPRL, 0xa5); | |
495 | short_pause (); | |
496 | val2 = sx_in_off(bp, CD186x_PPRL); | |
497 | ||
d61780c0 | 498 | |
1da177e4 LT |
499 | if ((val1 != 0x5a) || (val2 != 0xa5)) { |
500 | printk(KERN_INFO "sx%d: specialix IO8+ Board at 0x%03x not found.\n", | |
501 | board_No(bp), bp->base); | |
d61780c0 | 502 | sx_release_io_range(bp); |
1da177e4 LT |
503 | func_exit(); |
504 | return 1; | |
505 | } | |
506 | ||
d61780c0 | 507 | /* Check the DSR lines that Specialix uses as board |
1da177e4 LT |
508 | identification */ |
509 | val1 = read_cross_byte (bp, CD186x_MSVR, MSVR_DSR); | |
510 | val2 = read_cross_byte (bp, CD186x_MSVR, MSVR_RTS); | |
511 | dprintk (SX_DEBUG_INIT, "sx%d: DSR lines are: %02x, rts lines are: %02x\n", | |
512 | board_No(bp), val1, val2); | |
513 | ||
514 | /* They managed to switch the bit order between the docs and | |
515 | the IO8+ card. The new PCI card now conforms to old docs. | |
516 | They changed the PCI docs to reflect the situation on the | |
517 | old card. */ | |
518 | val2 = (bp->flags & SX_BOARD_IS_PCI)?0x4d : 0xb2; | |
519 | if (val1 != val2) { | |
520 | printk(KERN_INFO "sx%d: specialix IO8+ ID %02x at 0x%03x not found (%02x).\n", | |
521 | board_No(bp), val2, bp->base, val1); | |
d61780c0 | 522 | sx_release_io_range(bp); |
1da177e4 LT |
523 | func_exit(); |
524 | return 1; | |
525 | } | |
526 | ||
527 | ||
528 | #if 0 | |
529 | /* It's time to find IRQ for this board */ | |
530 | for (retries = 0; retries < 5 && irqs <= 0; retries++) { | |
531 | irqs = probe_irq_on(); | |
532 | sx_init_CD186x(bp); /* Reset CD186x chip */ | |
533 | sx_out(bp, CD186x_CAR, 2); /* Select port 2 */ | |
534 | sx_wait_CCR(bp); | |
535 | sx_out(bp, CD186x_CCR, CCR_TXEN); /* Enable transmitter */ | |
536 | sx_out(bp, CD186x_IER, IER_TXRDY); /* Enable tx empty intr */ | |
d61780c0 | 537 | sx_long_delay(HZ/20); |
1da177e4 LT |
538 | irqs = probe_irq_off(irqs); |
539 | ||
540 | dprintk (SX_DEBUG_INIT, "SRSR = %02x, ", sx_in(bp, CD186x_SRSR)); | |
541 | dprintk (SX_DEBUG_INIT, "TRAR = %02x, ", sx_in(bp, CD186x_TRAR)); | |
542 | dprintk (SX_DEBUG_INIT, "GIVR = %02x, ", sx_in(bp, CD186x_GIVR)); | |
543 | dprintk (SX_DEBUG_INIT, "GICR = %02x, ", sx_in(bp, CD186x_GICR)); | |
544 | dprintk (SX_DEBUG_INIT, "\n"); | |
545 | ||
546 | /* Reset CD186x again */ | |
547 | if (!sx_init_CD186x(bp)) { | |
548 | /* Hmmm. This is dead code anyway. */ | |
549 | } | |
550 | ||
551 | dprintk (SX_DEBUG_INIT "val1 = %02x, val2 = %02x, val3 = %02x.\n", | |
d61780c0 JG |
552 | val1, val2, val3); |
553 | ||
1da177e4 | 554 | } |
d61780c0 | 555 | |
1da177e4 LT |
556 | #if 0 |
557 | if (irqs <= 0) { | |
558 | printk(KERN_ERR "sx%d: Can't find IRQ for specialix IO8+ board at 0x%03x.\n", | |
559 | board_No(bp), bp->base); | |
d61780c0 | 560 | sx_release_io_range(bp); |
1da177e4 LT |
561 | func_exit(); |
562 | return 1; | |
563 | } | |
564 | #endif | |
565 | printk (KERN_INFO "Started with irq=%d, but now have irq=%d.\n", bp->irq, irqs); | |
566 | if (irqs > 0) | |
567 | bp->irq = irqs; | |
568 | #endif | |
569 | /* Reset CD186x again */ | |
570 | if (!sx_init_CD186x(bp)) { | |
d61780c0 | 571 | sx_release_io_range(bp); |
1da177e4 | 572 | func_exit(); |
d61780c0 | 573 | return 1; |
1da177e4 LT |
574 | } |
575 | ||
576 | sx_request_io_range(bp); | |
577 | bp->flags |= SX_BOARD_PRESENT; | |
d61780c0 | 578 | |
1da177e4 LT |
579 | /* Chip revcode pkgtype |
580 | GFRCR SRCR bit 7 | |
581 | CD180 rev B 0x81 0 | |
582 | CD180 rev C 0x82 0 | |
583 | CD1864 rev A 0x82 1 | |
d61780c0 | 584 | CD1865 rev A 0x83 1 -- Do not use!!! Does not work. |
1da177e4 LT |
585 | CD1865 rev B 0x84 1 |
586 | -- Thanks to Gwen Wang, Cirrus Logic. | |
587 | */ | |
588 | ||
589 | switch (sx_in_off(bp, CD186x_GFRCR)) { | |
590 | case 0x82:chip = 1864;rev='A';break; | |
591 | case 0x83:chip = 1865;rev='A';break; | |
592 | case 0x84:chip = 1865;rev='B';break; | |
593 | case 0x85:chip = 1865;rev='C';break; /* Does not exist at this time */ | |
594 | default:chip=-1;rev='x'; | |
595 | } | |
596 | ||
597 | dprintk (SX_DEBUG_INIT, " GFCR = 0x%02x\n", sx_in_off(bp, CD186x_GFRCR) ); | |
598 | ||
599 | #ifdef SPECIALIX_TIMER | |
600 | init_timer (&missed_irq_timer); | |
601 | missed_irq_timer.function = missed_irq; | |
602 | missed_irq_timer.data = (unsigned long) bp; | |
603 | missed_irq_timer.expires = jiffies + sx_poll; | |
604 | add_timer (&missed_irq_timer); | |
605 | #endif | |
606 | ||
607 | printk(KERN_INFO"sx%d: specialix IO8+ board detected at 0x%03x, IRQ %d, CD%d Rev. %c.\n", | |
608 | board_No(bp), | |
609 | bp->base, bp->irq, | |
610 | chip, rev); | |
611 | ||
612 | func_exit(); | |
613 | return 0; | |
614 | } | |
615 | ||
d61780c0 JG |
616 | /* |
617 | * | |
1da177e4 LT |
618 | * Interrupt processing routines. |
619 | * */ | |
620 | ||
621 | static inline void sx_mark_event(struct specialix_port * port, int event) | |
622 | { | |
623 | func_enter(); | |
624 | ||
625 | set_bit(event, &port->event); | |
626 | schedule_work(&port->tqueue); | |
627 | ||
628 | func_exit(); | |
629 | } | |
630 | ||
631 | ||
632 | static inline struct specialix_port * sx_get_port(struct specialix_board * bp, | |
633 | unsigned char const * what) | |
634 | { | |
635 | unsigned char channel; | |
636 | struct specialix_port * port = NULL; | |
637 | ||
638 | channel = sx_in(bp, CD186x_GICR) >> GICR_CHAN_OFF; | |
639 | dprintk (SX_DEBUG_CHAN, "channel: %d\n", channel); | |
640 | if (channel < CD186x_NCH) { | |
641 | port = &sx_port[board_No(bp) * SX_NPORT + channel]; | |
642 | dprintk (SX_DEBUG_CHAN, "port: %d %p flags: 0x%x\n",board_No(bp) * SX_NPORT + channel, port, port->flags & ASYNC_INITIALIZED); | |
643 | ||
644 | if (port->flags & ASYNC_INITIALIZED) { | |
645 | dprintk (SX_DEBUG_CHAN, "port: %d %p\n", channel, port); | |
646 | func_exit(); | |
647 | return port; | |
648 | } | |
649 | } | |
d61780c0 | 650 | printk(KERN_INFO "sx%d: %s interrupt from invalid port %d\n", |
1da177e4 LT |
651 | board_No(bp), what, channel); |
652 | return NULL; | |
653 | } | |
654 | ||
655 | ||
656 | static inline void sx_receive_exc(struct specialix_board * bp) | |
657 | { | |
658 | struct specialix_port *port; | |
659 | struct tty_struct *tty; | |
660 | unsigned char status; | |
33f0f88f | 661 | unsigned char ch, flag; |
1da177e4 LT |
662 | |
663 | func_enter(); | |
664 | ||
665 | port = sx_get_port(bp, "Receive"); | |
666 | if (!port) { | |
667 | dprintk (SX_DEBUG_RX, "Hmm, couldn't find port.\n"); | |
668 | func_exit(); | |
669 | return; | |
670 | } | |
671 | tty = port->tty; | |
d61780c0 | 672 | |
1da177e4 LT |
673 | status = sx_in(bp, CD186x_RCSR); |
674 | ||
675 | dprintk (SX_DEBUG_RX, "status: 0x%x\n", status); | |
676 | if (status & RCSR_OE) { | |
677 | port->overrun++; | |
678 | dprintk(SX_DEBUG_FIFO, "sx%d: port %d: Overrun. Total %ld overruns.\n", | |
679 | board_No(bp), port_No(port), port->overrun); | |
680 | } | |
681 | status &= port->mark_mask; | |
682 | ||
683 | /* This flip buffer check needs to be below the reading of the | |
684 | status register to reset the chip's IRQ.... */ | |
33f0f88f | 685 | if (tty_buffer_request_room(tty, 1) == 0) { |
1da177e4 LT |
686 | dprintk(SX_DEBUG_FIFO, "sx%d: port %d: Working around flip buffer overflow.\n", |
687 | board_No(bp), port_No(port)); | |
688 | func_exit(); | |
689 | return; | |
690 | } | |
691 | ||
692 | ch = sx_in(bp, CD186x_RDR); | |
693 | if (!status) { | |
694 | func_exit(); | |
695 | return; | |
696 | } | |
697 | if (status & RCSR_TOUT) { | |
d61780c0 | 698 | printk(KERN_INFO "sx%d: port %d: Receiver timeout. Hardware problems ?\n", |
1da177e4 LT |
699 | board_No(bp), port_No(port)); |
700 | func_exit(); | |
701 | return; | |
d61780c0 | 702 | |
1da177e4 LT |
703 | } else if (status & RCSR_BREAK) { |
704 | dprintk(SX_DEBUG_RX, "sx%d: port %d: Handling break...\n", | |
705 | board_No(bp), port_No(port)); | |
33f0f88f | 706 | flag = TTY_BREAK; |
1da177e4 LT |
707 | if (port->flags & ASYNC_SAK) |
708 | do_SAK(tty); | |
d61780c0 JG |
709 | |
710 | } else if (status & RCSR_PE) | |
33f0f88f | 711 | flag = TTY_PARITY; |
d61780c0 JG |
712 | |
713 | else if (status & RCSR_FE) | |
33f0f88f | 714 | flag = TTY_FRAME; |
d61780c0 | 715 | |
1da177e4 | 716 | else if (status & RCSR_OE) |
33f0f88f | 717 | flag = TTY_OVERRUN; |
d61780c0 | 718 | |
1da177e4 | 719 | else |
33f0f88f | 720 | flag = TTY_NORMAL; |
1da177e4 | 721 | |
33f0f88f AC |
722 | if(tty_insert_flip_char(tty, ch, flag)) |
723 | tty_flip_buffer_push(tty); | |
1da177e4 LT |
724 | func_exit(); |
725 | } | |
726 | ||
727 | ||
728 | static inline void sx_receive(struct specialix_board * bp) | |
729 | { | |
730 | struct specialix_port *port; | |
731 | struct tty_struct *tty; | |
732 | unsigned char count; | |
733 | ||
734 | func_enter(); | |
d61780c0 | 735 | |
1da177e4 LT |
736 | if (!(port = sx_get_port(bp, "Receive"))) { |
737 | dprintk (SX_DEBUG_RX, "Hmm, couldn't find port.\n"); | |
738 | func_exit(); | |
739 | return; | |
740 | } | |
741 | tty = port->tty; | |
d61780c0 | 742 | |
1da177e4 LT |
743 | count = sx_in(bp, CD186x_RDCR); |
744 | dprintk (SX_DEBUG_RX, "port: %p: count: %d\n", port, count); | |
745 | port->hits[count > 8 ? 9 : count]++; | |
d61780c0 | 746 | |
33f0f88f | 747 | tty_buffer_request_room(tty, count); |
1da177e4 | 748 | |
33f0f88f AC |
749 | while (count--) |
750 | tty_insert_flip_char(tty, sx_in(bp, CD186x_RDR), TTY_NORMAL); | |
751 | tty_flip_buffer_push(tty); | |
1da177e4 LT |
752 | func_exit(); |
753 | } | |
754 | ||
755 | ||
756 | static inline void sx_transmit(struct specialix_board * bp) | |
757 | { | |
758 | struct specialix_port *port; | |
759 | struct tty_struct *tty; | |
760 | unsigned char count; | |
761 | ||
762 | func_enter(); | |
763 | if (!(port = sx_get_port(bp, "Transmit"))) { | |
764 | func_exit(); | |
765 | return; | |
766 | } | |
767 | dprintk (SX_DEBUG_TX, "port: %p\n", port); | |
768 | tty = port->tty; | |
d61780c0 | 769 | |
1da177e4 LT |
770 | if (port->IER & IER_TXEMPTY) { |
771 | /* FIFO drained */ | |
772 | sx_out(bp, CD186x_CAR, port_No(port)); | |
773 | port->IER &= ~IER_TXEMPTY; | |
774 | sx_out(bp, CD186x_IER, port->IER); | |
775 | func_exit(); | |
776 | return; | |
777 | } | |
d61780c0 | 778 | |
1da177e4 LT |
779 | if ((port->xmit_cnt <= 0 && !port->break_length) |
780 | || tty->stopped || tty->hw_stopped) { | |
781 | sx_out(bp, CD186x_CAR, port_No(port)); | |
782 | port->IER &= ~IER_TXRDY; | |
783 | sx_out(bp, CD186x_IER, port->IER); | |
784 | func_exit(); | |
785 | return; | |
786 | } | |
d61780c0 | 787 | |
1da177e4 LT |
788 | if (port->break_length) { |
789 | if (port->break_length > 0) { | |
790 | if (port->COR2 & COR2_ETC) { | |
791 | sx_out(bp, CD186x_TDR, CD186x_C_ESC); | |
792 | sx_out(bp, CD186x_TDR, CD186x_C_SBRK); | |
793 | port->COR2 &= ~COR2_ETC; | |
794 | } | |
795 | count = min_t(int, port->break_length, 0xff); | |
796 | sx_out(bp, CD186x_TDR, CD186x_C_ESC); | |
797 | sx_out(bp, CD186x_TDR, CD186x_C_DELAY); | |
798 | sx_out(bp, CD186x_TDR, count); | |
799 | if (!(port->break_length -= count)) | |
800 | port->break_length--; | |
801 | } else { | |
802 | sx_out(bp, CD186x_TDR, CD186x_C_ESC); | |
803 | sx_out(bp, CD186x_TDR, CD186x_C_EBRK); | |
804 | sx_out(bp, CD186x_COR2, port->COR2); | |
805 | sx_wait_CCR(bp); | |
806 | sx_out(bp, CD186x_CCR, CCR_CORCHG2); | |
807 | port->break_length = 0; | |
808 | } | |
809 | ||
810 | func_exit(); | |
811 | return; | |
812 | } | |
d61780c0 | 813 | |
1da177e4 LT |
814 | count = CD186x_NFIFO; |
815 | do { | |
816 | sx_out(bp, CD186x_TDR, port->xmit_buf[port->xmit_tail++]); | |
817 | port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE-1); | |
818 | if (--port->xmit_cnt <= 0) | |
819 | break; | |
820 | } while (--count > 0); | |
d61780c0 | 821 | |
1da177e4 LT |
822 | if (port->xmit_cnt <= 0) { |
823 | sx_out(bp, CD186x_CAR, port_No(port)); | |
824 | port->IER &= ~IER_TXRDY; | |
825 | sx_out(bp, CD186x_IER, port->IER); | |
826 | } | |
827 | if (port->xmit_cnt <= port->wakeup_chars) | |
828 | sx_mark_event(port, RS_EVENT_WRITE_WAKEUP); | |
829 | ||
830 | func_exit(); | |
831 | } | |
832 | ||
833 | ||
834 | static inline void sx_check_modem(struct specialix_board * bp) | |
835 | { | |
836 | struct specialix_port *port; | |
837 | struct tty_struct *tty; | |
838 | unsigned char mcr; | |
839 | int msvr_cd; | |
840 | ||
841 | dprintk (SX_DEBUG_SIGNALS, "Modem intr. "); | |
842 | if (!(port = sx_get_port(bp, "Modem"))) | |
843 | return; | |
d61780c0 | 844 | |
1da177e4 | 845 | tty = port->tty; |
d61780c0 | 846 | |
1da177e4 LT |
847 | mcr = sx_in(bp, CD186x_MCR); |
848 | printk ("mcr = %02x.\n", mcr); | |
849 | ||
850 | if ((mcr & MCR_CDCHG)) { | |
851 | dprintk (SX_DEBUG_SIGNALS, "CD just changed... "); | |
852 | msvr_cd = sx_in(bp, CD186x_MSVR) & MSVR_CD; | |
853 | if (msvr_cd) { | |
854 | dprintk (SX_DEBUG_SIGNALS, "Waking up guys in open.\n"); | |
855 | wake_up_interruptible(&port->open_wait); | |
856 | } else { | |
857 | dprintk (SX_DEBUG_SIGNALS, "Sending HUP.\n"); | |
858 | schedule_work(&port->tqueue_hangup); | |
859 | } | |
860 | } | |
d61780c0 | 861 | |
1da177e4 LT |
862 | #ifdef SPECIALIX_BRAIN_DAMAGED_CTS |
863 | if (mcr & MCR_CTSCHG) { | |
864 | if (sx_in(bp, CD186x_MSVR) & MSVR_CTS) { | |
865 | tty->hw_stopped = 0; | |
866 | port->IER |= IER_TXRDY; | |
867 | if (port->xmit_cnt <= port->wakeup_chars) | |
868 | sx_mark_event(port, RS_EVENT_WRITE_WAKEUP); | |
869 | } else { | |
870 | tty->hw_stopped = 1; | |
871 | port->IER &= ~IER_TXRDY; | |
872 | } | |
873 | sx_out(bp, CD186x_IER, port->IER); | |
874 | } | |
875 | if (mcr & MCR_DSSXHG) { | |
876 | if (sx_in(bp, CD186x_MSVR) & MSVR_DSR) { | |
877 | tty->hw_stopped = 0; | |
878 | port->IER |= IER_TXRDY; | |
879 | if (port->xmit_cnt <= port->wakeup_chars) | |
880 | sx_mark_event(port, RS_EVENT_WRITE_WAKEUP); | |
881 | } else { | |
882 | tty->hw_stopped = 1; | |
883 | port->IER &= ~IER_TXRDY; | |
884 | } | |
885 | sx_out(bp, CD186x_IER, port->IER); | |
886 | } | |
887 | #endif /* SPECIALIX_BRAIN_DAMAGED_CTS */ | |
d61780c0 | 888 | |
1da177e4 LT |
889 | /* Clear change bits */ |
890 | sx_out(bp, CD186x_MCR, 0); | |
891 | } | |
892 | ||
893 | ||
894 | /* The main interrupt processing routine */ | |
7d12e780 | 895 | static irqreturn_t sx_interrupt(int irq, void *dev_id) |
1da177e4 LT |
896 | { |
897 | unsigned char status; | |
898 | unsigned char ack; | |
899 | struct specialix_board *bp; | |
900 | unsigned long loop = 0; | |
901 | int saved_reg; | |
902 | unsigned long flags; | |
903 | ||
904 | func_enter(); | |
905 | ||
906 | bp = dev_id; | |
907 | spin_lock_irqsave(&bp->lock, flags); | |
908 | ||
909 | 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); | |
c7bec5ab | 910 | if (!(bp->flags & SX_BOARD_ACTIVE)) { |
1da177e4 LT |
911 | dprintk (SX_DEBUG_IRQ, "sx: False interrupt. irq %d.\n", irq); |
912 | spin_unlock_irqrestore(&bp->lock, flags); | |
913 | func_exit(); | |
914 | return IRQ_NONE; | |
915 | } | |
916 | ||
917 | saved_reg = bp->reg; | |
918 | ||
919 | while ((++loop < 16) && (status = (sx_in(bp, CD186x_SRSR) & | |
920 | (SRSR_RREQint | | |
921 | SRSR_TREQint | | |
d61780c0 | 922 | SRSR_MREQint)))) { |
1da177e4 LT |
923 | if (status & SRSR_RREQint) { |
924 | ack = sx_in(bp, CD186x_RRAR); | |
925 | ||
926 | if (ack == (SX_ID | GIVR_IT_RCV)) | |
927 | sx_receive(bp); | |
928 | else if (ack == (SX_ID | GIVR_IT_REXC)) | |
929 | sx_receive_exc(bp); | |
930 | else | |
931 | printk(KERN_ERR "sx%d: status: 0x%x Bad receive ack 0x%02x.\n", | |
932 | board_No(bp), status, ack); | |
d61780c0 | 933 | |
1da177e4 LT |
934 | } else if (status & SRSR_TREQint) { |
935 | ack = sx_in(bp, CD186x_TRAR); | |
936 | ||
937 | if (ack == (SX_ID | GIVR_IT_TX)) | |
938 | sx_transmit(bp); | |
939 | else | |
940 | printk(KERN_ERR "sx%d: status: 0x%x Bad transmit ack 0x%02x. port: %d\n", | |
941 | board_No(bp), status, ack, port_No (sx_get_port (bp, "Int"))); | |
942 | } else if (status & SRSR_MREQint) { | |
943 | ack = sx_in(bp, CD186x_MRAR); | |
944 | ||
d61780c0 | 945 | if (ack == (SX_ID | GIVR_IT_MODEM)) |
1da177e4 LT |
946 | sx_check_modem(bp); |
947 | else | |
948 | printk(KERN_ERR "sx%d: status: 0x%x Bad modem ack 0x%02x.\n", | |
949 | board_No(bp), status, ack); | |
d61780c0 JG |
950 | |
951 | } | |
1da177e4 LT |
952 | |
953 | sx_out(bp, CD186x_EOIR, 0); /* Mark end of interrupt */ | |
954 | } | |
955 | bp->reg = saved_reg; | |
956 | outb (bp->reg, bp->base + SX_ADDR_REG); | |
957 | spin_unlock_irqrestore(&bp->lock, flags); | |
958 | func_exit(); | |
959 | return IRQ_HANDLED; | |
960 | } | |
961 | ||
962 | ||
963 | /* | |
964 | * Routines for open & close processing. | |
965 | */ | |
966 | ||
967 | static void turn_ints_off (struct specialix_board *bp) | |
968 | { | |
969 | unsigned long flags; | |
970 | ||
971 | func_enter(); | |
972 | if (bp->flags & SX_BOARD_IS_PCI) { | |
973 | /* This was intended for enabeling the interrupt on the | |
974 | * PCI card. However it seems that it's already enabled | |
975 | * and as PCI interrupts can be shared, there is no real | |
976 | * reason to have to turn it off. */ | |
977 | } | |
978 | ||
979 | spin_lock_irqsave(&bp->lock, flags); | |
980 | (void) sx_in_off (bp, 0); /* Turn off interrupts. */ | |
981 | spin_unlock_irqrestore(&bp->lock, flags); | |
982 | ||
983 | func_exit(); | |
984 | } | |
985 | ||
986 | static void turn_ints_on (struct specialix_board *bp) | |
987 | { | |
988 | unsigned long flags; | |
989 | ||
990 | func_enter(); | |
991 | ||
992 | if (bp->flags & SX_BOARD_IS_PCI) { | |
993 | /* play with the PCI chip. See comment above. */ | |
994 | } | |
995 | spin_lock_irqsave(&bp->lock, flags); | |
996 | (void) sx_in (bp, 0); /* Turn ON interrupts. */ | |
997 | spin_unlock_irqrestore(&bp->lock, flags); | |
998 | ||
999 | func_exit(); | |
1000 | } | |
1001 | ||
1002 | ||
1003 | /* Called with disabled interrupts */ | |
1004 | static inline int sx_setup_board(struct specialix_board * bp) | |
1005 | { | |
1006 | int error; | |
1007 | ||
d61780c0 | 1008 | if (bp->flags & SX_BOARD_ACTIVE) |
1da177e4 LT |
1009 | return 0; |
1010 | ||
1011 | if (bp->flags & SX_BOARD_IS_PCI) | |
0f2ed4c6 | 1012 | error = request_irq(bp->irq, sx_interrupt, IRQF_DISABLED | IRQF_SHARED, "specialix IO8+", bp); |
1da177e4 | 1013 | else |
0f2ed4c6 | 1014 | error = request_irq(bp->irq, sx_interrupt, IRQF_DISABLED, "specialix IO8+", bp); |
1da177e4 | 1015 | |
d61780c0 | 1016 | if (error) |
1da177e4 LT |
1017 | return error; |
1018 | ||
1019 | turn_ints_on (bp); | |
1020 | bp->flags |= SX_BOARD_ACTIVE; | |
1021 | ||
1022 | return 0; | |
1023 | } | |
1024 | ||
1025 | ||
1026 | /* Called with disabled interrupts */ | |
1027 | static inline void sx_shutdown_board(struct specialix_board *bp) | |
1028 | { | |
1029 | func_enter(); | |
1030 | ||
1031 | if (!(bp->flags & SX_BOARD_ACTIVE)) { | |
1032 | func_exit(); | |
1033 | return; | |
1034 | } | |
1035 | ||
1036 | bp->flags &= ~SX_BOARD_ACTIVE; | |
d61780c0 | 1037 | |
1da177e4 LT |
1038 | dprintk (SX_DEBUG_IRQ, "Freeing IRQ%d for board %d.\n", |
1039 | bp->irq, board_No (bp)); | |
1040 | free_irq(bp->irq, bp); | |
1041 | ||
1042 | turn_ints_off (bp); | |
1043 | ||
1044 | ||
1045 | func_exit(); | |
1046 | } | |
1047 | ||
1048 | ||
1049 | /* | |
d61780c0 | 1050 | * Setting up port characteristics. |
1da177e4 LT |
1051 | * Must be called with disabled interrupts |
1052 | */ | |
1053 | static void sx_change_speed(struct specialix_board *bp, struct specialix_port *port) | |
1054 | { | |
1055 | struct tty_struct *tty; | |
1056 | unsigned long baud; | |
1057 | long tmp; | |
1058 | unsigned char cor1 = 0, cor3 = 0; | |
1059 | unsigned char mcor1 = 0, mcor2 = 0; | |
1060 | static unsigned long again; | |
1061 | unsigned long flags; | |
1062 | ||
1063 | func_enter(); | |
1064 | ||
1065 | if (!(tty = port->tty) || !tty->termios) { | |
1066 | func_exit(); | |
1067 | return; | |
1068 | } | |
1069 | ||
1070 | port->IER = 0; | |
1071 | port->COR2 = 0; | |
1072 | /* Select port on the board */ | |
1073 | spin_lock_irqsave(&bp->lock, flags); | |
1074 | sx_out(bp, CD186x_CAR, port_No(port)); | |
1075 | ||
1076 | /* The Specialix board doens't implement the RTS lines. | |
1077 | They are used to set the IRQ level. Don't touch them. */ | |
1078 | if (SX_CRTSCTS(tty)) | |
1079 | port->MSVR = MSVR_DTR | (sx_in(bp, CD186x_MSVR) & MSVR_RTS); | |
1080 | else | |
1081 | port->MSVR = (sx_in(bp, CD186x_MSVR) & MSVR_RTS); | |
1082 | spin_unlock_irqrestore(&bp->lock, flags); | |
1083 | dprintk (SX_DEBUG_TERMIOS, "sx: got MSVR=%02x.\n", port->MSVR); | |
67cc0161 | 1084 | baud = tty_get_baud_rate(tty); |
d61780c0 | 1085 | |
67cc0161 | 1086 | if (baud == 38400) { |
1da177e4 | 1087 | if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) |
a4bb2cf1 | 1088 | baud = 57600; |
1da177e4 | 1089 | if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) |
a4bb2cf1 | 1090 | baud = 115200; |
1da177e4 | 1091 | } |
d61780c0 | 1092 | |
67cc0161 | 1093 | if (!baud) { |
1da177e4 LT |
1094 | /* Drop DTR & exit */ |
1095 | dprintk (SX_DEBUG_TERMIOS, "Dropping DTR... Hmm....\n"); | |
1096 | if (!SX_CRTSCTS (tty)) { | |
1097 | port -> MSVR &= ~ MSVR_DTR; | |
1098 | spin_lock_irqsave(&bp->lock, flags); | |
1099 | sx_out(bp, CD186x_MSVR, port->MSVR ); | |
1100 | spin_unlock_irqrestore(&bp->lock, flags); | |
d61780c0 | 1101 | } |
1da177e4 LT |
1102 | else |
1103 | dprintk (SX_DEBUG_TERMIOS, "Can't drop DTR: no DTR.\n"); | |
1104 | return; | |
1105 | } else { | |
1106 | /* Set DTR on */ | |
1107 | if (!SX_CRTSCTS (tty)) { | |
1108 | port ->MSVR |= MSVR_DTR; | |
1109 | } | |
1110 | } | |
d61780c0 | 1111 | |
1da177e4 | 1112 | /* |
d61780c0 | 1113 | * Now we must calculate some speed depended things |
1da177e4 LT |
1114 | */ |
1115 | ||
1116 | /* Set baud rate for port */ | |
1117 | tmp = port->custom_divisor ; | |
1118 | if ( tmp ) | |
1119 | printk (KERN_INFO "sx%d: Using custom baud rate divisor %ld. \n" | |
1120 | "This is an untested option, please be carefull.\n", | |
1121 | port_No (port), tmp); | |
1122 | else | |
67cc0161 | 1123 | tmp = (((SX_OSCFREQ + baud/2) / baud + |
1da177e4 LT |
1124 | CD186x_TPC/2) / CD186x_TPC); |
1125 | ||
d61780c0 | 1126 | if ((tmp < 0x10) && time_before(again, jiffies)) { |
1da177e4 LT |
1127 | again = jiffies + HZ * 60; |
1128 | /* Page 48 of version 2.0 of the CL-CD1865 databook */ | |
1129 | if (tmp >= 12) { | |
1130 | printk (KERN_INFO "sx%d: Baud rate divisor is %ld. \n" | |
1131 | "Performance degradation is possible.\n" | |
1132 | "Read specialix.txt for more info.\n", | |
1133 | port_No (port), tmp); | |
1134 | } else { | |
1135 | printk (KERN_INFO "sx%d: Baud rate divisor is %ld. \n" | |
1136 | "Warning: overstressing Cirrus chip. " | |
1137 | "This might not work.\n" | |
d61780c0 | 1138 | "Read specialix.txt for more info.\n", |
1da177e4 LT |
1139 | port_No (port), tmp); |
1140 | } | |
1141 | } | |
1142 | spin_lock_irqsave(&bp->lock, flags); | |
d61780c0 JG |
1143 | sx_out(bp, CD186x_RBPRH, (tmp >> 8) & 0xff); |
1144 | sx_out(bp, CD186x_TBPRH, (tmp >> 8) & 0xff); | |
1145 | sx_out(bp, CD186x_RBPRL, tmp & 0xff); | |
1da177e4 LT |
1146 | sx_out(bp, CD186x_TBPRL, tmp & 0xff); |
1147 | spin_unlock_irqrestore(&bp->lock, flags); | |
a4bb2cf1 | 1148 | if (port->custom_divisor) |
1da177e4 | 1149 | baud = (SX_OSCFREQ + port->custom_divisor/2) / port->custom_divisor; |
a4bb2cf1 | 1150 | baud = (baud + 5) / 10; /* Estimated CPS */ |
1da177e4 LT |
1151 | |
1152 | /* Two timer ticks seems enough to wakeup something like SLIP driver */ | |
d61780c0 | 1153 | tmp = ((baud + HZ/2) / HZ) * 2 - CD186x_NFIFO; |
1da177e4 LT |
1154 | port->wakeup_chars = (tmp < 0) ? 0 : ((tmp >= SERIAL_XMIT_SIZE) ? |
1155 | SERIAL_XMIT_SIZE - 1 : tmp); | |
d61780c0 | 1156 | |
1da177e4 LT |
1157 | /* Receiver timeout will be transmission time for 1.5 chars */ |
1158 | tmp = (SPECIALIX_TPS + SPECIALIX_TPS/2 + baud/2) / baud; | |
1159 | tmp = (tmp > 0xff) ? 0xff : tmp; | |
1160 | spin_lock_irqsave(&bp->lock, flags); | |
1161 | sx_out(bp, CD186x_RTPR, tmp); | |
1162 | spin_unlock_irqrestore(&bp->lock, flags); | |
1163 | switch (C_CSIZE(tty)) { | |
1164 | case CS5: | |
1165 | cor1 |= COR1_5BITS; | |
1166 | break; | |
1167 | case CS6: | |
1168 | cor1 |= COR1_6BITS; | |
1169 | break; | |
1170 | case CS7: | |
1171 | cor1 |= COR1_7BITS; | |
1172 | break; | |
1173 | case CS8: | |
1174 | cor1 |= COR1_8BITS; | |
1175 | break; | |
1176 | } | |
d61780c0 JG |
1177 | |
1178 | if (C_CSTOPB(tty)) | |
1da177e4 | 1179 | cor1 |= COR1_2SB; |
d61780c0 | 1180 | |
1da177e4 LT |
1181 | cor1 |= COR1_IGNORE; |
1182 | if (C_PARENB(tty)) { | |
1183 | cor1 |= COR1_NORMPAR; | |
d61780c0 | 1184 | if (C_PARODD(tty)) |
1da177e4 | 1185 | cor1 |= COR1_ODDP; |
d61780c0 | 1186 | if (I_INPCK(tty)) |
1da177e4 LT |
1187 | cor1 &= ~COR1_IGNORE; |
1188 | } | |
1189 | /* Set marking of some errors */ | |
1190 | port->mark_mask = RCSR_OE | RCSR_TOUT; | |
d61780c0 | 1191 | if (I_INPCK(tty)) |
1da177e4 | 1192 | port->mark_mask |= RCSR_FE | RCSR_PE; |
d61780c0 | 1193 | if (I_BRKINT(tty) || I_PARMRK(tty)) |
1da177e4 | 1194 | port->mark_mask |= RCSR_BREAK; |
d61780c0 | 1195 | if (I_IGNPAR(tty)) |
1da177e4 LT |
1196 | port->mark_mask &= ~(RCSR_FE | RCSR_PE); |
1197 | if (I_IGNBRK(tty)) { | |
1198 | port->mark_mask &= ~RCSR_BREAK; | |
d61780c0 | 1199 | if (I_IGNPAR(tty)) |
1da177e4 LT |
1200 | /* Real raw mode. Ignore all */ |
1201 | port->mark_mask &= ~RCSR_OE; | |
1202 | } | |
1203 | /* Enable Hardware Flow Control */ | |
1204 | if (C_CRTSCTS(tty)) { | |
1205 | #ifdef SPECIALIX_BRAIN_DAMAGED_CTS | |
1206 | port->IER |= IER_DSR | IER_CTS; | |
1207 | mcor1 |= MCOR1_DSRZD | MCOR1_CTSZD; | |
1208 | mcor2 |= MCOR2_DSROD | MCOR2_CTSOD; | |
1209 | spin_lock_irqsave(&bp->lock, flags); | |
1210 | tty->hw_stopped = !(sx_in(bp, CD186x_MSVR) & (MSVR_CTS|MSVR_DSR)); | |
1211 | spin_unlock_irqrestore(&bp->lock, flags); | |
1212 | #else | |
d61780c0 | 1213 | port->COR2 |= COR2_CTSAE; |
1da177e4 LT |
1214 | #endif |
1215 | } | |
1216 | /* Enable Software Flow Control. FIXME: I'm not sure about this */ | |
1217 | /* Some people reported that it works, but I still doubt it */ | |
1218 | if (I_IXON(tty)) { | |
1219 | port->COR2 |= COR2_TXIBE; | |
1220 | cor3 |= (COR3_FCT | COR3_SCDE); | |
1221 | if (I_IXANY(tty)) | |
1222 | port->COR2 |= COR2_IXM; | |
1223 | spin_lock_irqsave(&bp->lock, flags); | |
1224 | sx_out(bp, CD186x_SCHR1, START_CHAR(tty)); | |
1225 | sx_out(bp, CD186x_SCHR2, STOP_CHAR(tty)); | |
1226 | sx_out(bp, CD186x_SCHR3, START_CHAR(tty)); | |
1227 | sx_out(bp, CD186x_SCHR4, STOP_CHAR(tty)); | |
1228 | spin_unlock_irqrestore(&bp->lock, flags); | |
1229 | } | |
1230 | if (!C_CLOCAL(tty)) { | |
1231 | /* Enable CD check */ | |
1232 | port->IER |= IER_CD; | |
1233 | mcor1 |= MCOR1_CDZD; | |
1234 | mcor2 |= MCOR2_CDOD; | |
1235 | } | |
d61780c0 JG |
1236 | |
1237 | if (C_CREAD(tty)) | |
1da177e4 LT |
1238 | /* Enable receiver */ |
1239 | port->IER |= IER_RXD; | |
d61780c0 | 1240 | |
1da177e4 LT |
1241 | /* Set input FIFO size (1-8 bytes) */ |
1242 | cor3 |= sx_rxfifo; | |
1243 | /* Setting up CD186x channel registers */ | |
1244 | spin_lock_irqsave(&bp->lock, flags); | |
1245 | sx_out(bp, CD186x_COR1, cor1); | |
1246 | sx_out(bp, CD186x_COR2, port->COR2); | |
1247 | sx_out(bp, CD186x_COR3, cor3); | |
1248 | spin_unlock_irqrestore(&bp->lock, flags); | |
1249 | /* Make CD186x know about registers change */ | |
1250 | sx_wait_CCR(bp); | |
1251 | spin_lock_irqsave(&bp->lock, flags); | |
1252 | sx_out(bp, CD186x_CCR, CCR_CORCHG1 | CCR_CORCHG2 | CCR_CORCHG3); | |
1253 | /* Setting up modem option registers */ | |
1254 | dprintk (SX_DEBUG_TERMIOS, "Mcor1 = %02x, mcor2 = %02x.\n", mcor1, mcor2); | |
1255 | sx_out(bp, CD186x_MCOR1, mcor1); | |
1256 | sx_out(bp, CD186x_MCOR2, mcor2); | |
1257 | spin_unlock_irqrestore(&bp->lock, flags); | |
1258 | /* Enable CD186x transmitter & receiver */ | |
1259 | sx_wait_CCR(bp); | |
1260 | spin_lock_irqsave(&bp->lock, flags); | |
1261 | sx_out(bp, CD186x_CCR, CCR_TXEN | CCR_RXEN); | |
1262 | /* Enable interrupts */ | |
1263 | sx_out(bp, CD186x_IER, port->IER); | |
1264 | /* And finally set the modem lines... */ | |
1265 | sx_out(bp, CD186x_MSVR, port->MSVR); | |
1266 | spin_unlock_irqrestore(&bp->lock, flags); | |
1267 | ||
1268 | func_exit(); | |
1269 | } | |
1270 | ||
1271 | ||
1272 | /* Must be called with interrupts enabled */ | |
1273 | static int sx_setup_port(struct specialix_board *bp, struct specialix_port *port) | |
1274 | { | |
1275 | unsigned long flags; | |
1276 | ||
1277 | func_enter(); | |
1278 | ||
1279 | if (port->flags & ASYNC_INITIALIZED) { | |
1280 | func_exit(); | |
1281 | return 0; | |
1282 | } | |
d61780c0 | 1283 | |
1da177e4 LT |
1284 | if (!port->xmit_buf) { |
1285 | /* We may sleep in get_zeroed_page() */ | |
1286 | unsigned long tmp; | |
d61780c0 | 1287 | |
1da177e4 LT |
1288 | if (!(tmp = get_zeroed_page(GFP_KERNEL))) { |
1289 | func_exit(); | |
1290 | return -ENOMEM; | |
1291 | } | |
1292 | ||
1293 | if (port->xmit_buf) { | |
1294 | free_page(tmp); | |
1295 | func_exit(); | |
1296 | return -ERESTARTSYS; | |
1297 | } | |
1298 | port->xmit_buf = (unsigned char *) tmp; | |
1299 | } | |
d61780c0 | 1300 | |
1da177e4 LT |
1301 | spin_lock_irqsave(&port->lock, flags); |
1302 | ||
d61780c0 | 1303 | if (port->tty) |
1da177e4 LT |
1304 | clear_bit(TTY_IO_ERROR, &port->tty->flags); |
1305 | ||
1306 | port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; | |
1307 | sx_change_speed(bp, port); | |
1308 | port->flags |= ASYNC_INITIALIZED; | |
1309 | ||
1310 | spin_unlock_irqrestore(&port->lock, flags); | |
1311 | ||
d61780c0 | 1312 | |
1da177e4 LT |
1313 | func_exit(); |
1314 | return 0; | |
1315 | } | |
1316 | ||
1317 | ||
1318 | /* Must be called with interrupts disabled */ | |
1319 | static void sx_shutdown_port(struct specialix_board *bp, struct specialix_port *port) | |
1320 | { | |
1321 | struct tty_struct *tty; | |
1322 | int i; | |
1323 | unsigned long flags; | |
d61780c0 | 1324 | |
1da177e4 LT |
1325 | func_enter(); |
1326 | ||
1327 | if (!(port->flags & ASYNC_INITIALIZED)) { | |
1328 | func_exit(); | |
1329 | return; | |
1330 | } | |
d61780c0 | 1331 | |
1da177e4 LT |
1332 | if (sx_debug & SX_DEBUG_FIFO) { |
1333 | dprintk(SX_DEBUG_FIFO, "sx%d: port %d: %ld overruns, FIFO hits [ ", | |
1334 | board_No(bp), port_No(port), port->overrun); | |
1335 | for (i = 0; i < 10; i++) { | |
1336 | dprintk(SX_DEBUG_FIFO, "%ld ", port->hits[i]); | |
1337 | } | |
1338 | dprintk(SX_DEBUG_FIFO, "].\n"); | |
1339 | } | |
1340 | ||
1341 | if (port->xmit_buf) { | |
1342 | free_page((unsigned long) port->xmit_buf); | |
1343 | port->xmit_buf = NULL; | |
1344 | } | |
1345 | ||
1346 | /* Select port */ | |
1347 | spin_lock_irqsave(&bp->lock, flags); | |
1348 | sx_out(bp, CD186x_CAR, port_No(port)); | |
1349 | ||
1350 | if (!(tty = port->tty) || C_HUPCL(tty)) { | |
1351 | /* Drop DTR */ | |
1352 | sx_out(bp, CD186x_MSVDTR, 0); | |
1353 | } | |
1354 | spin_unlock_irqrestore(&bp->lock, flags); | |
1355 | /* Reset port */ | |
1356 | sx_wait_CCR(bp); | |
1357 | spin_lock_irqsave(&bp->lock, flags); | |
1358 | sx_out(bp, CD186x_CCR, CCR_SOFTRESET); | |
1359 | /* Disable all interrupts from this port */ | |
1360 | port->IER = 0; | |
1361 | sx_out(bp, CD186x_IER, port->IER); | |
1362 | spin_unlock_irqrestore(&bp->lock, flags); | |
1363 | if (tty) | |
1364 | set_bit(TTY_IO_ERROR, &tty->flags); | |
1365 | port->flags &= ~ASYNC_INITIALIZED; | |
d61780c0 JG |
1366 | |
1367 | if (!bp->count) | |
1da177e4 LT |
1368 | sx_shutdown_board(bp); |
1369 | func_exit(); | |
1370 | } | |
1371 | ||
d61780c0 | 1372 | |
1da177e4 LT |
1373 | static int block_til_ready(struct tty_struct *tty, struct file * filp, |
1374 | struct specialix_port *port) | |
1375 | { | |
1376 | DECLARE_WAITQUEUE(wait, current); | |
1377 | struct specialix_board *bp = port_Board(port); | |
1378 | int retval; | |
1379 | int do_clocal = 0; | |
1380 | int CD; | |
1381 | unsigned long flags; | |
1382 | ||
1383 | func_enter(); | |
1384 | ||
1385 | /* | |
1386 | * If the device is in the middle of being closed, then block | |
1387 | * until it's done, and then try again. | |
1388 | */ | |
1389 | if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING) { | |
1390 | interruptible_sleep_on(&port->close_wait); | |
1391 | if (port->flags & ASYNC_HUP_NOTIFY) { | |
1392 | func_exit(); | |
1393 | return -EAGAIN; | |
1394 | } else { | |
1395 | func_exit(); | |
1396 | return -ERESTARTSYS; | |
1397 | } | |
1398 | } | |
d61780c0 | 1399 | |
1da177e4 LT |
1400 | /* |
1401 | * If non-blocking mode is set, or the port is not enabled, | |
1402 | * then make the check up front and then exit. | |
1403 | */ | |
1404 | if ((filp->f_flags & O_NONBLOCK) || | |
1405 | (tty->flags & (1 << TTY_IO_ERROR))) { | |
1406 | port->flags |= ASYNC_NORMAL_ACTIVE; | |
1407 | func_exit(); | |
1408 | return 0; | |
1409 | } | |
1410 | ||
1411 | if (C_CLOCAL(tty)) | |
1412 | do_clocal = 1; | |
1413 | ||
1414 | /* | |
1415 | * Block waiting for the carrier detect and the line to become | |
1416 | * free (i.e., not in use by the callout). While we are in | |
1417 | * this loop, info->count is dropped by one, so that | |
1418 | * rs_close() knows when to free things. We restore it upon | |
1419 | * exit, either normal or abnormal. | |
1420 | */ | |
1421 | retval = 0; | |
1422 | add_wait_queue(&port->open_wait, &wait); | |
1423 | spin_lock_irqsave(&port->lock, flags); | |
1424 | if (!tty_hung_up_p(filp)) { | |
1425 | port->count--; | |
1426 | } | |
1427 | spin_unlock_irqrestore(&port->lock, flags); | |
1428 | port->blocked_open++; | |
1429 | while (1) { | |
1430 | spin_lock_irqsave(&bp->lock, flags); | |
1431 | sx_out(bp, CD186x_CAR, port_No(port)); | |
1432 | CD = sx_in(bp, CD186x_MSVR) & MSVR_CD; | |
1433 | if (SX_CRTSCTS (tty)) { | |
1434 | /* Activate RTS */ | |
1435 | port->MSVR |= MSVR_DTR; /* WTF? */ | |
1436 | sx_out (bp, CD186x_MSVR, port->MSVR); | |
1437 | } else { | |
1438 | /* Activate DTR */ | |
1439 | port->MSVR |= MSVR_DTR; | |
1440 | sx_out (bp, CD186x_MSVR, port->MSVR); | |
1441 | } | |
1442 | spin_unlock_irqrestore(&bp->lock, flags); | |
1443 | set_current_state(TASK_INTERRUPTIBLE); | |
1444 | if (tty_hung_up_p(filp) || | |
1445 | !(port->flags & ASYNC_INITIALIZED)) { | |
1446 | if (port->flags & ASYNC_HUP_NOTIFY) | |
1447 | retval = -EAGAIN; | |
1448 | else | |
d61780c0 | 1449 | retval = -ERESTARTSYS; |
1da177e4 LT |
1450 | break; |
1451 | } | |
1452 | if (!(port->flags & ASYNC_CLOSING) && | |
1453 | (do_clocal || CD)) | |
1454 | break; | |
1455 | if (signal_pending(current)) { | |
1456 | retval = -ERESTARTSYS; | |
1457 | break; | |
1458 | } | |
1459 | schedule(); | |
1460 | } | |
1461 | ||
1462 | set_current_state(TASK_RUNNING); | |
1463 | remove_wait_queue(&port->open_wait, &wait); | |
1464 | spin_lock_irqsave(&port->lock, flags); | |
1465 | if (!tty_hung_up_p(filp)) { | |
1466 | port->count++; | |
1467 | } | |
1468 | port->blocked_open--; | |
1469 | spin_unlock_irqrestore(&port->lock, flags); | |
1470 | if (retval) { | |
1471 | func_exit(); | |
1472 | return retval; | |
1473 | } | |
1474 | ||
1475 | port->flags |= ASYNC_NORMAL_ACTIVE; | |
1476 | func_exit(); | |
1477 | return 0; | |
d61780c0 | 1478 | } |
1da177e4 LT |
1479 | |
1480 | ||
1481 | static int sx_open(struct tty_struct * tty, struct file * filp) | |
1482 | { | |
1483 | int board; | |
1484 | int error; | |
1485 | struct specialix_port * port; | |
1486 | struct specialix_board * bp; | |
1487 | int i; | |
1488 | unsigned long flags; | |
1489 | ||
1490 | func_enter(); | |
1491 | ||
1492 | board = SX_BOARD(tty->index); | |
1493 | ||
1494 | if (board >= SX_NBOARD || !(sx_board[board].flags & SX_BOARD_PRESENT)) { | |
1495 | func_exit(); | |
1496 | return -ENODEV; | |
1497 | } | |
d61780c0 | 1498 | |
1da177e4 LT |
1499 | bp = &sx_board[board]; |
1500 | port = sx_port + board * SX_NPORT + SX_PORT(tty->index); | |
1501 | port->overrun = 0; | |
1502 | for (i = 0; i < 10; i++) | |
1503 | port->hits[i]=0; | |
1504 | ||
1505 | dprintk (SX_DEBUG_OPEN, "Board = %d, bp = %p, port = %p, portno = %d.\n", | |
1506 | board, bp, port, SX_PORT(tty->index)); | |
1507 | ||
1508 | if (sx_paranoia_check(port, tty->name, "sx_open")) { | |
1509 | func_enter(); | |
1510 | return -ENODEV; | |
1511 | } | |
1512 | ||
1513 | if ((error = sx_setup_board(bp))) { | |
1514 | func_exit(); | |
1515 | return error; | |
1516 | } | |
1517 | ||
1518 | spin_lock_irqsave(&bp->lock, flags); | |
1519 | port->count++; | |
1520 | bp->count++; | |
1521 | tty->driver_data = port; | |
1522 | port->tty = tty; | |
1523 | spin_unlock_irqrestore(&bp->lock, flags); | |
1524 | ||
1525 | if ((error = sx_setup_port(bp, port))) { | |
1526 | func_enter(); | |
1527 | return error; | |
1528 | } | |
d61780c0 | 1529 | |
1da177e4 LT |
1530 | if ((error = block_til_ready(tty, filp, port))) { |
1531 | func_enter(); | |
1532 | return error; | |
1533 | } | |
1534 | ||
1535 | func_exit(); | |
1536 | return 0; | |
1537 | } | |
1538 | ||
1539 | ||
1540 | static void sx_close(struct tty_struct * tty, struct file * filp) | |
1541 | { | |
1542 | struct specialix_port *port = (struct specialix_port *) tty->driver_data; | |
1543 | struct specialix_board *bp; | |
1544 | unsigned long flags; | |
1545 | unsigned long timeout; | |
d61780c0 | 1546 | |
1da177e4 LT |
1547 | func_enter(); |
1548 | if (!port || sx_paranoia_check(port, tty->name, "close")) { | |
1549 | func_exit(); | |
1550 | return; | |
1551 | } | |
1552 | spin_lock_irqsave(&port->lock, flags); | |
1553 | ||
1554 | if (tty_hung_up_p(filp)) { | |
1555 | spin_unlock_irqrestore(&port->lock, flags); | |
1556 | func_exit(); | |
1557 | return; | |
1558 | } | |
d61780c0 | 1559 | |
1da177e4 LT |
1560 | bp = port_Board(port); |
1561 | if ((tty->count == 1) && (port->count != 1)) { | |
1562 | printk(KERN_ERR "sx%d: sx_close: bad port count;" | |
1563 | " tty->count is 1, port count is %d\n", | |
1564 | board_No(bp), port->count); | |
1565 | port->count = 1; | |
1566 | } | |
1567 | ||
1568 | if (port->count > 1) { | |
1569 | port->count--; | |
1570 | bp->count--; | |
1571 | ||
1572 | spin_unlock_irqrestore(&port->lock, flags); | |
1573 | ||
1574 | func_exit(); | |
1575 | return; | |
1576 | } | |
1577 | port->flags |= ASYNC_CLOSING; | |
1578 | /* | |
d61780c0 | 1579 | * Now we wait for the transmit buffer to clear; and we notify |
1da177e4 LT |
1580 | * the line discipline to only process XON/XOFF characters. |
1581 | */ | |
1582 | tty->closing = 1; | |
1583 | spin_unlock_irqrestore(&port->lock, flags); | |
1584 | dprintk (SX_DEBUG_OPEN, "Closing\n"); | |
1585 | if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE) { | |
1586 | tty_wait_until_sent(tty, port->closing_wait); | |
1587 | } | |
1588 | /* | |
1589 | * At this point we stop accepting input. To do this, we | |
1590 | * disable the receive line status interrupts, and tell the | |
1591 | * interrupt driver to stop checking the data ready bit in the | |
1592 | * line status register. | |
1593 | */ | |
1594 | dprintk (SX_DEBUG_OPEN, "Closed\n"); | |
1595 | port->IER &= ~IER_RXD; | |
1596 | if (port->flags & ASYNC_INITIALIZED) { | |
1597 | port->IER &= ~IER_TXRDY; | |
1598 | port->IER |= IER_TXEMPTY; | |
1599 | spin_lock_irqsave(&bp->lock, flags); | |
1600 | sx_out(bp, CD186x_CAR, port_No(port)); | |
1601 | sx_out(bp, CD186x_IER, port->IER); | |
1602 | spin_unlock_irqrestore(&bp->lock, flags); | |
1603 | /* | |
1604 | * Before we drop DTR, make sure the UART transmitter | |
1605 | * has completely drained; this is especially | |
1606 | * important if there is a transmit FIFO! | |
1607 | */ | |
1608 | timeout = jiffies+HZ; | |
1609 | while(port->IER & IER_TXEMPTY) { | |
1610 | set_current_state (TASK_INTERRUPTIBLE); | |
1611 | msleep_interruptible(jiffies_to_msecs(port->timeout)); | |
1612 | if (time_after(jiffies, timeout)) { | |
1613 | printk (KERN_INFO "Timeout waiting for close\n"); | |
1614 | break; | |
1615 | } | |
1616 | } | |
1617 | ||
1618 | } | |
1619 | ||
1620 | if (--bp->count < 0) { | |
1621 | printk(KERN_ERR "sx%d: sx_shutdown_port: bad board count: %d port: %d\n", | |
1622 | board_No(bp), bp->count, tty->index); | |
1623 | bp->count = 0; | |
1624 | } | |
1625 | if (--port->count < 0) { | |
1626 | printk(KERN_ERR "sx%d: sx_close: bad port count for tty%d: %d\n", | |
1627 | board_No(bp), port_No(port), port->count); | |
1628 | port->count = 0; | |
1629 | } | |
1630 | ||
1631 | sx_shutdown_port(bp, port); | |
1632 | if (tty->driver->flush_buffer) | |
1633 | tty->driver->flush_buffer(tty); | |
1634 | tty_ldisc_flush(tty); | |
1635 | spin_lock_irqsave(&port->lock, flags); | |
1636 | tty->closing = 0; | |
1637 | port->event = 0; | |
1638 | port->tty = NULL; | |
1639 | spin_unlock_irqrestore(&port->lock, flags); | |
1640 | if (port->blocked_open) { | |
1641 | if (port->close_delay) { | |
1642 | msleep_interruptible(jiffies_to_msecs(port->close_delay)); | |
1643 | } | |
1644 | wake_up_interruptible(&port->open_wait); | |
1645 | } | |
1646 | port->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING); | |
1647 | wake_up_interruptible(&port->close_wait); | |
1648 | ||
1649 | func_exit(); | |
1650 | } | |
1651 | ||
1652 | ||
d61780c0 | 1653 | static int sx_write(struct tty_struct * tty, |
1da177e4 LT |
1654 | const unsigned char *buf, int count) |
1655 | { | |
1656 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; | |
1657 | struct specialix_board *bp; | |
1658 | int c, total = 0; | |
1659 | unsigned long flags; | |
1660 | ||
1661 | func_enter(); | |
1662 | if (sx_paranoia_check(port, tty->name, "sx_write")) { | |
1663 | func_exit(); | |
1664 | return 0; | |
1665 | } | |
d61780c0 | 1666 | |
1da177e4 LT |
1667 | bp = port_Board(port); |
1668 | ||
365e0223 | 1669 | if (!port->xmit_buf) { |
1da177e4 LT |
1670 | func_exit(); |
1671 | return 0; | |
1672 | } | |
1673 | ||
1674 | while (1) { | |
1675 | spin_lock_irqsave(&port->lock, flags); | |
1676 | c = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt - 1, | |
1677 | SERIAL_XMIT_SIZE - port->xmit_head)); | |
1678 | if (c <= 0) { | |
1679 | spin_unlock_irqrestore(&port->lock, flags); | |
1680 | break; | |
1681 | } | |
1682 | memcpy(port->xmit_buf + port->xmit_head, buf, c); | |
1683 | port->xmit_head = (port->xmit_head + c) & (SERIAL_XMIT_SIZE-1); | |
1684 | port->xmit_cnt += c; | |
1685 | spin_unlock_irqrestore(&port->lock, flags); | |
1686 | ||
1687 | buf += c; | |
1688 | count -= c; | |
1689 | total += c; | |
1690 | } | |
1691 | ||
1692 | spin_lock_irqsave(&bp->lock, flags); | |
1693 | if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped && | |
1694 | !(port->IER & IER_TXRDY)) { | |
1695 | port->IER |= IER_TXRDY; | |
1696 | sx_out(bp, CD186x_CAR, port_No(port)); | |
1697 | sx_out(bp, CD186x_IER, port->IER); | |
1698 | } | |
1699 | spin_unlock_irqrestore(&bp->lock, flags); | |
1700 | func_exit(); | |
1701 | ||
1702 | return total; | |
1703 | } | |
1704 | ||
1705 | ||
1706 | static void sx_put_char(struct tty_struct * tty, unsigned char ch) | |
1707 | { | |
1708 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; | |
1709 | unsigned long flags; | |
1710 | struct specialix_board * bp; | |
1711 | ||
1712 | func_enter(); | |
1713 | ||
1714 | if (sx_paranoia_check(port, tty->name, "sx_put_char")) { | |
1715 | func_exit(); | |
1716 | return; | |
1717 | } | |
1718 | dprintk (SX_DEBUG_TX, "check tty: %p %p\n", tty, port->xmit_buf); | |
326f28e9 | 1719 | if (!port->xmit_buf) { |
1da177e4 LT |
1720 | func_exit(); |
1721 | return; | |
1722 | } | |
1723 | bp = port_Board(port); | |
1724 | spin_lock_irqsave(&port->lock, flags); | |
1725 | ||
1726 | dprintk (SX_DEBUG_TX, "xmit_cnt: %d xmit_buf: %p\n", port->xmit_cnt, port->xmit_buf); | |
1727 | if ((port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) || (!port->xmit_buf)) { | |
1728 | spin_unlock_irqrestore(&port->lock, flags); | |
1729 | dprintk (SX_DEBUG_TX, "Exit size\n"); | |
1730 | func_exit(); | |
1731 | return; | |
1732 | } | |
1733 | dprintk (SX_DEBUG_TX, "Handle xmit: %p %p\n", port, port->xmit_buf); | |
1734 | port->xmit_buf[port->xmit_head++] = ch; | |
1735 | port->xmit_head &= SERIAL_XMIT_SIZE - 1; | |
1736 | port->xmit_cnt++; | |
1737 | spin_unlock_irqrestore(&port->lock, flags); | |
1738 | ||
1739 | func_exit(); | |
1740 | } | |
1741 | ||
1742 | ||
1743 | static void sx_flush_chars(struct tty_struct * tty) | |
1744 | { | |
1745 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; | |
1746 | unsigned long flags; | |
1747 | struct specialix_board * bp = port_Board(port); | |
1748 | ||
1749 | func_enter(); | |
1750 | ||
1751 | if (sx_paranoia_check(port, tty->name, "sx_flush_chars")) { | |
1752 | func_exit(); | |
1753 | return; | |
1754 | } | |
1755 | if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped || | |
1756 | !port->xmit_buf) { | |
1757 | func_exit(); | |
1758 | return; | |
1759 | } | |
1760 | spin_lock_irqsave(&bp->lock, flags); | |
1761 | port->IER |= IER_TXRDY; | |
1762 | sx_out(port_Board(port), CD186x_CAR, port_No(port)); | |
1763 | sx_out(port_Board(port), CD186x_IER, port->IER); | |
1764 | spin_unlock_irqrestore(&bp->lock, flags); | |
1765 | ||
1766 | func_exit(); | |
1767 | } | |
1768 | ||
1769 | ||
1770 | static int sx_write_room(struct tty_struct * tty) | |
1771 | { | |
1772 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; | |
1773 | int ret; | |
1774 | ||
1775 | func_enter(); | |
1776 | ||
1777 | if (sx_paranoia_check(port, tty->name, "sx_write_room")) { | |
1778 | func_exit(); | |
1779 | return 0; | |
1780 | } | |
1781 | ||
1782 | ret = SERIAL_XMIT_SIZE - port->xmit_cnt - 1; | |
1783 | if (ret < 0) | |
1784 | ret = 0; | |
1785 | ||
1786 | func_exit(); | |
1787 | return ret; | |
1788 | } | |
1789 | ||
1790 | ||
1791 | static int sx_chars_in_buffer(struct tty_struct *tty) | |
1792 | { | |
1793 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; | |
1794 | ||
1795 | func_enter(); | |
d61780c0 | 1796 | |
1da177e4 LT |
1797 | if (sx_paranoia_check(port, tty->name, "sx_chars_in_buffer")) { |
1798 | func_exit(); | |
1799 | return 0; | |
1800 | } | |
1801 | func_exit(); | |
1802 | return port->xmit_cnt; | |
1803 | } | |
1804 | ||
1805 | ||
1806 | static void sx_flush_buffer(struct tty_struct *tty) | |
1807 | { | |
1808 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; | |
1809 | unsigned long flags; | |
1810 | struct specialix_board * bp; | |
1811 | ||
1812 | func_enter(); | |
1813 | ||
1814 | if (sx_paranoia_check(port, tty->name, "sx_flush_buffer")) { | |
1815 | func_exit(); | |
1816 | return; | |
1817 | } | |
1818 | ||
1819 | bp = port_Board(port); | |
1820 | spin_lock_irqsave(&port->lock, flags); | |
1821 | port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; | |
1822 | spin_unlock_irqrestore(&port->lock, flags); | |
1823 | tty_wakeup(tty); | |
1824 | ||
1825 | func_exit(); | |
1826 | } | |
1827 | ||
1828 | ||
1829 | static int sx_tiocmget(struct tty_struct *tty, struct file *file) | |
1830 | { | |
1831 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; | |
1832 | struct specialix_board * bp; | |
1833 | unsigned char status; | |
1834 | unsigned int result; | |
1835 | unsigned long flags; | |
1836 | ||
1837 | func_enter(); | |
1838 | ||
1839 | if (sx_paranoia_check(port, tty->name, __FUNCTION__)) { | |
1840 | func_exit(); | |
1841 | return -ENODEV; | |
1842 | } | |
1843 | ||
1844 | bp = port_Board(port); | |
1845 | spin_lock_irqsave (&bp->lock, flags); | |
1846 | sx_out(bp, CD186x_CAR, port_No(port)); | |
1847 | status = sx_in(bp, CD186x_MSVR); | |
1848 | spin_unlock_irqrestore(&bp->lock, flags); | |
1849 | dprintk (SX_DEBUG_INIT, "Got msvr[%d] = %02x, car = %d.\n", | |
1850 | port_No(port), status, sx_in (bp, CD186x_CAR)); | |
1851 | dprintk (SX_DEBUG_INIT, "sx_port = %p, port = %p\n", sx_port, port); | |
1852 | if (SX_CRTSCTS(port->tty)) { | |
d61780c0 | 1853 | result = /* (status & MSVR_RTS) ? */ TIOCM_DTR /* : 0) */ |
1da177e4 LT |
1854 | | ((status & MSVR_DTR) ? TIOCM_RTS : 0) |
1855 | | ((status & MSVR_CD) ? TIOCM_CAR : 0) | |
1856 | |/* ((status & MSVR_DSR) ? */ TIOCM_DSR /* : 0) */ | |
1857 | | ((status & MSVR_CTS) ? TIOCM_CTS : 0); | |
1858 | } else { | |
d61780c0 | 1859 | result = /* (status & MSVR_RTS) ? */ TIOCM_RTS /* : 0) */ |
1da177e4 LT |
1860 | | ((status & MSVR_DTR) ? TIOCM_DTR : 0) |
1861 | | ((status & MSVR_CD) ? TIOCM_CAR : 0) | |
1862 | |/* ((status & MSVR_DSR) ? */ TIOCM_DSR /* : 0) */ | |
1863 | | ((status & MSVR_CTS) ? TIOCM_CTS : 0); | |
1864 | } | |
1865 | ||
1866 | func_exit(); | |
1867 | ||
1868 | return result; | |
1869 | } | |
1870 | ||
1871 | ||
1872 | static int sx_tiocmset(struct tty_struct *tty, struct file *file, | |
1873 | unsigned int set, unsigned int clear) | |
1874 | { | |
1875 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; | |
1876 | unsigned long flags; | |
1877 | struct specialix_board *bp; | |
1878 | ||
1879 | func_enter(); | |
1880 | ||
1881 | if (sx_paranoia_check(port, tty->name, __FUNCTION__)) { | |
1882 | func_exit(); | |
1883 | return -ENODEV; | |
1884 | } | |
1885 | ||
1886 | bp = port_Board(port); | |
1887 | ||
1888 | spin_lock_irqsave(&port->lock, flags); | |
1889 | /* if (set & TIOCM_RTS) | |
1890 | port->MSVR |= MSVR_RTS; */ | |
1891 | /* if (set & TIOCM_DTR) | |
1892 | port->MSVR |= MSVR_DTR; */ | |
1893 | ||
1894 | if (SX_CRTSCTS(port->tty)) { | |
1895 | if (set & TIOCM_RTS) | |
1896 | port->MSVR |= MSVR_DTR; | |
1897 | } else { | |
1898 | if (set & TIOCM_DTR) | |
1899 | port->MSVR |= MSVR_DTR; | |
1900 | } | |
1901 | ||
1902 | /* if (clear & TIOCM_RTS) | |
1903 | port->MSVR &= ~MSVR_RTS; */ | |
1904 | /* if (clear & TIOCM_DTR) | |
1905 | port->MSVR &= ~MSVR_DTR; */ | |
1906 | if (SX_CRTSCTS(port->tty)) { | |
1907 | if (clear & TIOCM_RTS) | |
1908 | port->MSVR &= ~MSVR_DTR; | |
1909 | } else { | |
1910 | if (clear & TIOCM_DTR) | |
1911 | port->MSVR &= ~MSVR_DTR; | |
1912 | } | |
1913 | spin_lock_irqsave(&bp->lock, flags); | |
1914 | sx_out(bp, CD186x_CAR, port_No(port)); | |
1915 | sx_out(bp, CD186x_MSVR, port->MSVR); | |
1916 | spin_unlock_irqrestore(&bp->lock, flags); | |
1917 | spin_unlock_irqrestore(&port->lock, flags); | |
1918 | func_exit(); | |
1919 | return 0; | |
1920 | } | |
1921 | ||
1922 | ||
1923 | static inline void sx_send_break(struct specialix_port * port, unsigned long length) | |
1924 | { | |
1925 | struct specialix_board *bp = port_Board(port); | |
1926 | unsigned long flags; | |
d61780c0 | 1927 | |
1da177e4 LT |
1928 | func_enter(); |
1929 | ||
1930 | spin_lock_irqsave (&port->lock, flags); | |
1931 | port->break_length = SPECIALIX_TPS / HZ * length; | |
1932 | port->COR2 |= COR2_ETC; | |
1933 | port->IER |= IER_TXRDY; | |
1934 | spin_lock_irqsave(&bp->lock, flags); | |
1935 | sx_out(bp, CD186x_CAR, port_No(port)); | |
1936 | sx_out(bp, CD186x_COR2, port->COR2); | |
1937 | sx_out(bp, CD186x_IER, port->IER); | |
1938 | spin_unlock_irqrestore(&bp->lock, flags); | |
1939 | spin_unlock_irqrestore (&port->lock, flags); | |
1940 | sx_wait_CCR(bp); | |
1941 | spin_lock_irqsave(&bp->lock, flags); | |
1942 | sx_out(bp, CD186x_CCR, CCR_CORCHG2); | |
1943 | spin_unlock_irqrestore(&bp->lock, flags); | |
1944 | sx_wait_CCR(bp); | |
1945 | ||
1946 | func_exit(); | |
1947 | } | |
1948 | ||
1949 | ||
1950 | static inline int sx_set_serial_info(struct specialix_port * port, | |
1951 | struct serial_struct __user * newinfo) | |
1952 | { | |
1953 | struct serial_struct tmp; | |
1954 | struct specialix_board *bp = port_Board(port); | |
1955 | int change_speed; | |
1956 | ||
1957 | func_enter(); | |
1958 | /* | |
e49332bd | 1959 | if (!access_ok(VERIFY_READ, (void *) newinfo, sizeof(tmp))) { |
1da177e4 | 1960 | func_exit(); |
e49332bd | 1961 | return -EFAULT; |
1da177e4 LT |
1962 | } |
1963 | */ | |
1964 | if (copy_from_user(&tmp, newinfo, sizeof(tmp))) { | |
1965 | func_enter(); | |
1966 | return -EFAULT; | |
1967 | } | |
d61780c0 JG |
1968 | |
1969 | #if 0 | |
1da177e4 LT |
1970 | if ((tmp.irq != bp->irq) || |
1971 | (tmp.port != bp->base) || | |
1972 | (tmp.type != PORT_CIRRUS) || | |
1973 | (tmp.baud_base != (SX_OSCFREQ + CD186x_TPC/2) / CD186x_TPC) || | |
1974 | (tmp.custom_divisor != 0) || | |
1975 | (tmp.xmit_fifo_size != CD186x_NFIFO) || | |
1976 | (tmp.flags & ~SPECIALIX_LEGAL_FLAGS)) { | |
1977 | func_exit(); | |
1978 | return -EINVAL; | |
1979 | } | |
d61780c0 | 1980 | #endif |
1da177e4 LT |
1981 | |
1982 | change_speed = ((port->flags & ASYNC_SPD_MASK) != | |
1983 | (tmp.flags & ASYNC_SPD_MASK)); | |
1984 | change_speed |= (tmp.custom_divisor != port->custom_divisor); | |
d61780c0 | 1985 | |
1da177e4 LT |
1986 | if (!capable(CAP_SYS_ADMIN)) { |
1987 | if ((tmp.close_delay != port->close_delay) || | |
1988 | (tmp.closing_wait != port->closing_wait) || | |
1989 | ((tmp.flags & ~ASYNC_USR_MASK) != | |
1990 | (port->flags & ~ASYNC_USR_MASK))) { | |
1991 | func_exit(); | |
1992 | return -EPERM; | |
1993 | } | |
1994 | port->flags = ((port->flags & ~ASYNC_USR_MASK) | | |
1995 | (tmp.flags & ASYNC_USR_MASK)); | |
1996 | port->custom_divisor = tmp.custom_divisor; | |
1997 | } else { | |
1998 | port->flags = ((port->flags & ~ASYNC_FLAGS) | | |
1999 | (tmp.flags & ASYNC_FLAGS)); | |
2000 | port->close_delay = tmp.close_delay; | |
2001 | port->closing_wait = tmp.closing_wait; | |
2002 | port->custom_divisor = tmp.custom_divisor; | |
2003 | } | |
2004 | if (change_speed) { | |
2005 | sx_change_speed(bp, port); | |
2006 | } | |
2007 | func_exit(); | |
2008 | return 0; | |
2009 | } | |
2010 | ||
2011 | ||
2012 | static inline int sx_get_serial_info(struct specialix_port * port, | |
2013 | struct serial_struct __user *retinfo) | |
2014 | { | |
2015 | struct serial_struct tmp; | |
2016 | struct specialix_board *bp = port_Board(port); | |
d61780c0 | 2017 | |
1da177e4 LT |
2018 | func_enter(); |
2019 | ||
2020 | /* | |
e49332bd JJ |
2021 | if (!access_ok(VERIFY_WRITE, (void *) retinfo, sizeof(tmp))) |
2022 | return -EFAULT; | |
1da177e4 LT |
2023 | */ |
2024 | ||
2025 | memset(&tmp, 0, sizeof(tmp)); | |
2026 | tmp.type = PORT_CIRRUS; | |
2027 | tmp.line = port - sx_port; | |
2028 | tmp.port = bp->base; | |
2029 | tmp.irq = bp->irq; | |
2030 | tmp.flags = port->flags; | |
2031 | tmp.baud_base = (SX_OSCFREQ + CD186x_TPC/2) / CD186x_TPC; | |
2032 | tmp.close_delay = port->close_delay * HZ/100; | |
2033 | tmp.closing_wait = port->closing_wait * HZ/100; | |
2034 | tmp.custom_divisor = port->custom_divisor; | |
2035 | tmp.xmit_fifo_size = CD186x_NFIFO; | |
2036 | if (copy_to_user(retinfo, &tmp, sizeof(tmp))) { | |
2037 | func_exit(); | |
2038 | return -EFAULT; | |
2039 | } | |
2040 | ||
2041 | func_exit(); | |
2042 | return 0; | |
2043 | } | |
2044 | ||
2045 | ||
d61780c0 | 2046 | static int sx_ioctl(struct tty_struct * tty, struct file * filp, |
1da177e4 LT |
2047 | unsigned int cmd, unsigned long arg) |
2048 | { | |
2049 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; | |
2050 | int retval; | |
2051 | void __user *argp = (void __user *)arg; | |
2052 | ||
2053 | func_enter(); | |
2054 | ||
2055 | if (sx_paranoia_check(port, tty->name, "sx_ioctl")) { | |
2056 | func_exit(); | |
2057 | return -ENODEV; | |
2058 | } | |
d61780c0 | 2059 | |
1da177e4 LT |
2060 | switch (cmd) { |
2061 | case TCSBRK: /* SVID version: non-zero arg --> no break */ | |
2062 | retval = tty_check_change(tty); | |
2063 | if (retval) { | |
2064 | func_exit(); | |
2065 | return retval; | |
2066 | } | |
2067 | tty_wait_until_sent(tty, 0); | |
2068 | if (!arg) | |
2069 | sx_send_break(port, HZ/4); /* 1/4 second */ | |
2070 | return 0; | |
2071 | case TCSBRKP: /* support for POSIX tcsendbreak() */ | |
2072 | retval = tty_check_change(tty); | |
2073 | if (retval) { | |
2074 | func_exit(); | |
2075 | return retval; | |
2076 | } | |
2077 | tty_wait_until_sent(tty, 0); | |
2078 | sx_send_break(port, arg ? arg*(HZ/10) : HZ/4); | |
2079 | func_exit(); | |
2080 | return 0; | |
2081 | case TIOCGSOFTCAR: | |
2082 | if (put_user(C_CLOCAL(tty)?1:0, (unsigned long __user *)argp)) { | |
2083 | func_exit(); | |
2084 | return -EFAULT; | |
2085 | } | |
2086 | func_exit(); | |
2087 | return 0; | |
2088 | case TIOCSSOFTCAR: | |
2089 | if (get_user(arg, (unsigned long __user *) argp)) { | |
2090 | func_exit(); | |
2091 | return -EFAULT; | |
2092 | } | |
2093 | tty->termios->c_cflag = | |
2094 | ((tty->termios->c_cflag & ~CLOCAL) | | |
2095 | (arg ? CLOCAL : 0)); | |
2096 | func_exit(); | |
2097 | return 0; | |
2098 | case TIOCGSERIAL: | |
2099 | func_exit(); | |
2100 | return sx_get_serial_info(port, argp); | |
d61780c0 | 2101 | case TIOCSSERIAL: |
1da177e4 LT |
2102 | func_exit(); |
2103 | return sx_set_serial_info(port, argp); | |
2104 | default: | |
2105 | func_exit(); | |
2106 | return -ENOIOCTLCMD; | |
2107 | } | |
2108 | func_exit(); | |
2109 | return 0; | |
2110 | } | |
2111 | ||
2112 | ||
2113 | static void sx_throttle(struct tty_struct * tty) | |
2114 | { | |
2115 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; | |
2116 | struct specialix_board *bp; | |
2117 | unsigned long flags; | |
2118 | ||
2119 | func_enter(); | |
2120 | ||
2121 | if (sx_paranoia_check(port, tty->name, "sx_throttle")) { | |
2122 | func_exit(); | |
2123 | return; | |
2124 | } | |
d61780c0 | 2125 | |
1da177e4 | 2126 | bp = port_Board(port); |
d61780c0 | 2127 | |
1da177e4 | 2128 | /* Use DTR instead of RTS ! */ |
d61780c0 | 2129 | if (SX_CRTSCTS (tty)) |
1da177e4 LT |
2130 | port->MSVR &= ~MSVR_DTR; |
2131 | else { | |
2132 | /* Auch!!! I think the system shouldn't call this then. */ | |
2133 | /* Or maybe we're supposed (allowed?) to do our side of hw | |
d61780c0 | 2134 | handshake anyway, even when hardware handshake is off. |
1da177e4 LT |
2135 | When you see this in your logs, please report.... */ |
2136 | printk (KERN_ERR "sx%d: Need to throttle, but can't (hardware hs is off)\n", | |
2137 | port_No (port)); | |
2138 | } | |
2139 | spin_lock_irqsave(&bp->lock, flags); | |
2140 | sx_out(bp, CD186x_CAR, port_No(port)); | |
2141 | spin_unlock_irqrestore(&bp->lock, flags); | |
2142 | if (I_IXOFF(tty)) { | |
2143 | spin_unlock_irqrestore(&bp->lock, flags); | |
2144 | sx_wait_CCR(bp); | |
2145 | spin_lock_irqsave(&bp->lock, flags); | |
2146 | sx_out(bp, CD186x_CCR, CCR_SSCH2); | |
2147 | spin_unlock_irqrestore(&bp->lock, flags); | |
2148 | sx_wait_CCR(bp); | |
2149 | } | |
2150 | spin_lock_irqsave(&bp->lock, flags); | |
2151 | sx_out(bp, CD186x_MSVR, port->MSVR); | |
2152 | spin_unlock_irqrestore(&bp->lock, flags); | |
2153 | ||
2154 | func_exit(); | |
2155 | } | |
2156 | ||
2157 | ||
2158 | static void sx_unthrottle(struct tty_struct * tty) | |
2159 | { | |
2160 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; | |
2161 | struct specialix_board *bp; | |
2162 | unsigned long flags; | |
2163 | ||
2164 | func_enter(); | |
d61780c0 | 2165 | |
1da177e4 LT |
2166 | if (sx_paranoia_check(port, tty->name, "sx_unthrottle")) { |
2167 | func_exit(); | |
2168 | return; | |
2169 | } | |
d61780c0 | 2170 | |
1da177e4 | 2171 | bp = port_Board(port); |
d61780c0 | 2172 | |
1da177e4 LT |
2173 | spin_lock_irqsave(&port->lock, flags); |
2174 | /* XXXX Use DTR INSTEAD???? */ | |
2175 | if (SX_CRTSCTS(tty)) { | |
2176 | port->MSVR |= MSVR_DTR; | |
2177 | } /* Else clause: see remark in "sx_throttle"... */ | |
2178 | spin_lock_irqsave(&bp->lock, flags); | |
2179 | sx_out(bp, CD186x_CAR, port_No(port)); | |
2180 | spin_unlock_irqrestore(&bp->lock, flags); | |
2181 | if (I_IXOFF(tty)) { | |
2182 | spin_unlock_irqrestore(&port->lock, flags); | |
2183 | sx_wait_CCR(bp); | |
2184 | spin_lock_irqsave(&bp->lock, flags); | |
2185 | sx_out(bp, CD186x_CCR, CCR_SSCH1); | |
2186 | spin_unlock_irqrestore(&bp->lock, flags); | |
2187 | sx_wait_CCR(bp); | |
2188 | spin_lock_irqsave(&port->lock, flags); | |
2189 | } | |
2190 | spin_lock_irqsave(&bp->lock, flags); | |
2191 | sx_out(bp, CD186x_MSVR, port->MSVR); | |
2192 | spin_unlock_irqrestore(&bp->lock, flags); | |
2193 | spin_unlock_irqrestore(&port->lock, flags); | |
2194 | ||
2195 | func_exit(); | |
2196 | } | |
2197 | ||
2198 | ||
2199 | static void sx_stop(struct tty_struct * tty) | |
2200 | { | |
2201 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; | |
2202 | struct specialix_board *bp; | |
2203 | unsigned long flags; | |
2204 | ||
2205 | func_enter(); | |
d61780c0 | 2206 | |
1da177e4 LT |
2207 | if (sx_paranoia_check(port, tty->name, "sx_stop")) { |
2208 | func_exit(); | |
2209 | return; | |
2210 | } | |
2211 | ||
2212 | bp = port_Board(port); | |
d61780c0 | 2213 | |
1da177e4 LT |
2214 | spin_lock_irqsave(&port->lock, flags); |
2215 | port->IER &= ~IER_TXRDY; | |
2216 | spin_lock_irqsave(&bp->lock, flags); | |
2217 | sx_out(bp, CD186x_CAR, port_No(port)); | |
2218 | sx_out(bp, CD186x_IER, port->IER); | |
2219 | spin_unlock_irqrestore(&bp->lock, flags); | |
2220 | spin_unlock_irqrestore(&port->lock, flags); | |
2221 | ||
2222 | func_exit(); | |
2223 | } | |
2224 | ||
2225 | ||
2226 | static void sx_start(struct tty_struct * tty) | |
2227 | { | |
2228 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; | |
2229 | struct specialix_board *bp; | |
2230 | unsigned long flags; | |
2231 | ||
2232 | func_enter(); | |
d61780c0 | 2233 | |
1da177e4 LT |
2234 | if (sx_paranoia_check(port, tty->name, "sx_start")) { |
2235 | func_exit(); | |
2236 | return; | |
2237 | } | |
d61780c0 | 2238 | |
1da177e4 | 2239 | bp = port_Board(port); |
d61780c0 | 2240 | |
1da177e4 LT |
2241 | spin_lock_irqsave(&port->lock, flags); |
2242 | if (port->xmit_cnt && port->xmit_buf && !(port->IER & IER_TXRDY)) { | |
2243 | port->IER |= IER_TXRDY; | |
2244 | spin_lock_irqsave(&bp->lock, flags); | |
2245 | sx_out(bp, CD186x_CAR, port_No(port)); | |
2246 | sx_out(bp, CD186x_IER, port->IER); | |
2247 | spin_unlock_irqrestore(&bp->lock, flags); | |
2248 | } | |
2249 | spin_unlock_irqrestore(&port->lock, flags); | |
2250 | ||
2251 | func_exit(); | |
2252 | } | |
2253 | ||
2254 | ||
2255 | /* | |
2256 | * This routine is called from the work-queue when the interrupt | |
2257 | * routine has signalled that a hangup has occurred. The path of | |
2258 | * hangup processing is: | |
2259 | * | |
2260 | * serial interrupt routine -> (workqueue) -> | |
2261 | * do_sx_hangup() -> tty->hangup() -> sx_hangup() | |
d61780c0 | 2262 | * |
1da177e4 LT |
2263 | */ |
2264 | static void do_sx_hangup(void *private_) | |
2265 | { | |
2266 | struct specialix_port *port = (struct specialix_port *) private_; | |
2267 | struct tty_struct *tty; | |
d61780c0 | 2268 | |
1da177e4 LT |
2269 | func_enter(); |
2270 | ||
2271 | tty = port->tty; | |
2272 | if (tty) | |
2273 | tty_hangup(tty); /* FIXME: module removal race here */ | |
2274 | ||
2275 | func_exit(); | |
2276 | } | |
2277 | ||
2278 | ||
2279 | static void sx_hangup(struct tty_struct * tty) | |
2280 | { | |
2281 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; | |
2282 | struct specialix_board *bp; | |
2283 | unsigned long flags; | |
2284 | ||
2285 | func_enter(); | |
2286 | ||
2287 | if (sx_paranoia_check(port, tty->name, "sx_hangup")) { | |
2288 | func_exit(); | |
2289 | return; | |
2290 | } | |
d61780c0 | 2291 | |
1da177e4 | 2292 | bp = port_Board(port); |
d61780c0 | 2293 | |
1da177e4 LT |
2294 | sx_shutdown_port(bp, port); |
2295 | spin_lock_irqsave(&port->lock, flags); | |
2296 | port->event = 0; | |
2297 | bp->count -= port->count; | |
2298 | if (bp->count < 0) { | |
2299 | printk(KERN_ERR "sx%d: sx_hangup: bad board count: %d port: %d\n", | |
2300 | board_No(bp), bp->count, tty->index); | |
2301 | bp->count = 0; | |
2302 | } | |
2303 | port->count = 0; | |
2304 | port->flags &= ~ASYNC_NORMAL_ACTIVE; | |
2305 | port->tty = NULL; | |
2306 | spin_unlock_irqrestore(&port->lock, flags); | |
2307 | wake_up_interruptible(&port->open_wait); | |
2308 | ||
2309 | func_exit(); | |
2310 | } | |
2311 | ||
2312 | ||
2313 | static void sx_set_termios(struct tty_struct * tty, struct termios * old_termios) | |
2314 | { | |
2315 | struct specialix_port *port = (struct specialix_port *)tty->driver_data; | |
2316 | unsigned long flags; | |
2317 | struct specialix_board * bp; | |
d61780c0 | 2318 | |
1da177e4 LT |
2319 | if (sx_paranoia_check(port, tty->name, "sx_set_termios")) |
2320 | return; | |
d61780c0 | 2321 | |
1da177e4 LT |
2322 | if (tty->termios->c_cflag == old_termios->c_cflag && |
2323 | tty->termios->c_iflag == old_termios->c_iflag) | |
2324 | return; | |
2325 | ||
2326 | bp = port_Board(port); | |
2327 | spin_lock_irqsave(&port->lock, flags); | |
2328 | sx_change_speed(port_Board(port), port); | |
2329 | spin_unlock_irqrestore(&port->lock, flags); | |
2330 | ||
2331 | if ((old_termios->c_cflag & CRTSCTS) && | |
2332 | !(tty->termios->c_cflag & CRTSCTS)) { | |
2333 | tty->hw_stopped = 0; | |
2334 | sx_start(tty); | |
2335 | } | |
2336 | } | |
2337 | ||
2338 | ||
2339 | static void do_softint(void *private_) | |
2340 | { | |
2341 | struct specialix_port *port = (struct specialix_port *) private_; | |
2342 | struct tty_struct *tty; | |
2343 | ||
2344 | func_enter(); | |
2345 | ||
2346 | if(!(tty = port->tty)) { | |
2347 | func_exit(); | |
2348 | return; | |
2349 | } | |
2350 | ||
2351 | if (test_and_clear_bit(RS_EVENT_WRITE_WAKEUP, &port->event)) { | |
2352 | tty_wakeup(tty); | |
2353 | //wake_up_interruptible(&tty->write_wait); | |
2354 | } | |
2355 | ||
2356 | func_exit(); | |
2357 | } | |
2358 | ||
b68e31d0 | 2359 | static const struct tty_operations sx_ops = { |
1da177e4 LT |
2360 | .open = sx_open, |
2361 | .close = sx_close, | |
2362 | .write = sx_write, | |
2363 | .put_char = sx_put_char, | |
2364 | .flush_chars = sx_flush_chars, | |
2365 | .write_room = sx_write_room, | |
2366 | .chars_in_buffer = sx_chars_in_buffer, | |
2367 | .flush_buffer = sx_flush_buffer, | |
2368 | .ioctl = sx_ioctl, | |
2369 | .throttle = sx_throttle, | |
2370 | .unthrottle = sx_unthrottle, | |
2371 | .set_termios = sx_set_termios, | |
2372 | .stop = sx_stop, | |
2373 | .start = sx_start, | |
2374 | .hangup = sx_hangup, | |
2375 | .tiocmget = sx_tiocmget, | |
2376 | .tiocmset = sx_tiocmset, | |
2377 | }; | |
2378 | ||
2379 | static int sx_init_drivers(void) | |
2380 | { | |
2381 | int error; | |
2382 | int i; | |
2383 | ||
2384 | func_enter(); | |
2385 | ||
2386 | specialix_driver = alloc_tty_driver(SX_NBOARD * SX_NPORT); | |
2387 | if (!specialix_driver) { | |
2388 | printk(KERN_ERR "sx: Couldn't allocate tty_driver.\n"); | |
2389 | func_exit(); | |
2390 | return 1; | |
2391 | } | |
d61780c0 | 2392 | |
1da177e4 LT |
2393 | specialix_driver->owner = THIS_MODULE; |
2394 | specialix_driver->name = "ttyW"; | |
2395 | specialix_driver->major = SPECIALIX_NORMAL_MAJOR; | |
2396 | specialix_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
2397 | specialix_driver->subtype = SERIAL_TYPE_NORMAL; | |
2398 | specialix_driver->init_termios = tty_std_termios; | |
2399 | specialix_driver->init_termios.c_cflag = | |
2400 | B9600 | CS8 | CREAD | HUPCL | CLOCAL; | |
2401 | specialix_driver->flags = TTY_DRIVER_REAL_RAW; | |
2402 | tty_set_operations(specialix_driver, &sx_ops); | |
2403 | ||
2404 | if ((error = tty_register_driver(specialix_driver))) { | |
2405 | put_tty_driver(specialix_driver); | |
1da177e4 LT |
2406 | printk(KERN_ERR "sx: Couldn't register specialix IO8+ driver, error = %d\n", |
2407 | error); | |
2408 | func_exit(); | |
2409 | return 1; | |
2410 | } | |
2411 | memset(sx_port, 0, sizeof(sx_port)); | |
2412 | for (i = 0; i < SX_NPORT * SX_NBOARD; i++) { | |
2413 | sx_port[i].magic = SPECIALIX_MAGIC; | |
2414 | INIT_WORK(&sx_port[i].tqueue, do_softint, &sx_port[i]); | |
2415 | INIT_WORK(&sx_port[i].tqueue_hangup, do_sx_hangup, &sx_port[i]); | |
2416 | sx_port[i].close_delay = 50 * HZ/100; | |
2417 | sx_port[i].closing_wait = 3000 * HZ/100; | |
2418 | init_waitqueue_head(&sx_port[i].open_wait); | |
2419 | init_waitqueue_head(&sx_port[i].close_wait); | |
2420 | spin_lock_init(&sx_port[i].lock); | |
2421 | } | |
d61780c0 | 2422 | |
1da177e4 LT |
2423 | func_exit(); |
2424 | return 0; | |
2425 | } | |
2426 | ||
2427 | static void sx_release_drivers(void) | |
2428 | { | |
2429 | func_enter(); | |
2430 | ||
1da177e4 LT |
2431 | tty_unregister_driver(specialix_driver); |
2432 | put_tty_driver(specialix_driver); | |
2433 | func_exit(); | |
2434 | } | |
2435 | ||
d61780c0 JG |
2436 | /* |
2437 | * This routine must be called by kernel at boot time | |
1da177e4 LT |
2438 | */ |
2439 | static int __init specialix_init(void) | |
2440 | { | |
2441 | int i; | |
2442 | int found = 0; | |
2443 | ||
2444 | func_enter(); | |
2445 | ||
2446 | printk(KERN_INFO "sx: Specialix IO8+ driver v" VERSION ", (c) R.E.Wolff 1997/1998.\n"); | |
2447 | printk(KERN_INFO "sx: derived from work (c) D.Gorodchanin 1994-1996.\n"); | |
2448 | #ifdef CONFIG_SPECIALIX_RTSCTS | |
2449 | printk (KERN_INFO "sx: DTR/RTS pin is always RTS.\n"); | |
2450 | #else | |
2451 | printk (KERN_INFO "sx: DTR/RTS pin is RTS when CRTSCTS is on.\n"); | |
2452 | #endif | |
d61780c0 | 2453 | |
1da177e4 | 2454 | for (i = 0; i < SX_NBOARD; i++) |
34af946a | 2455 | spin_lock_init(&sx_board[i].lock); |
1da177e4 LT |
2456 | |
2457 | if (sx_init_drivers()) { | |
2458 | func_exit(); | |
2459 | return -EIO; | |
2460 | } | |
2461 | ||
d61780c0 | 2462 | for (i = 0; i < SX_NBOARD; i++) |
1da177e4 LT |
2463 | if (sx_board[i].base && !sx_probe(&sx_board[i])) |
2464 | found++; | |
2465 | ||
2466 | #ifdef CONFIG_PCI | |
2467 | { | |
2468 | struct pci_dev *pdev = NULL; | |
2469 | ||
2470 | i=0; | |
2471 | while (i < SX_NBOARD) { | |
2472 | if (sx_board[i].flags & SX_BOARD_PRESENT) { | |
2473 | i++; | |
2474 | continue; | |
2475 | } | |
d61780c0 JG |
2476 | pdev = pci_find_device (PCI_VENDOR_ID_SPECIALIX, |
2477 | PCI_DEVICE_ID_SPECIALIX_IO8, | |
1da177e4 LT |
2478 | pdev); |
2479 | if (!pdev) break; | |
2480 | ||
2481 | if (pci_enable_device(pdev)) | |
2482 | continue; | |
2483 | ||
2484 | sx_board[i].irq = pdev->irq; | |
2485 | ||
2486 | sx_board[i].base = pci_resource_start (pdev, 2); | |
2487 | ||
2488 | sx_board[i].flags |= SX_BOARD_IS_PCI; | |
2489 | if (!sx_probe(&sx_board[i])) | |
2490 | found ++; | |
2491 | } | |
2492 | } | |
2493 | #endif | |
2494 | ||
2495 | if (!found) { | |
2496 | sx_release_drivers(); | |
2497 | printk(KERN_INFO "sx: No specialix IO8+ boards detected.\n"); | |
2498 | func_exit(); | |
2499 | return -EIO; | |
2500 | } | |
2501 | ||
2502 | func_exit(); | |
2503 | return 0; | |
2504 | } | |
2505 | ||
2506 | static int iobase[SX_NBOARD] = {0,}; | |
2507 | ||
2508 | static int irq [SX_NBOARD] = {0,}; | |
2509 | ||
2510 | module_param_array(iobase, int, NULL, 0); | |
2511 | module_param_array(irq, int, NULL, 0); | |
2512 | module_param(sx_debug, int, 0); | |
2513 | module_param(sx_rxfifo, int, 0); | |
2514 | #ifdef SPECIALIX_TIMER | |
2515 | module_param(sx_poll, int, 0); | |
2516 | #endif | |
2517 | ||
2518 | /* | |
2519 | * You can setup up to 4 boards. | |
2520 | * by specifying "iobase=0xXXX,0xXXX ..." as insmod parameter. | |
d61780c0 JG |
2521 | * You should specify the IRQs too in that case "irq=....,...". |
2522 | * | |
1da177e4 | 2523 | * More than 4 boards in one computer is not possible, as the card can |
d61780c0 | 2524 | * only use 4 different interrupts. |
1da177e4 LT |
2525 | * |
2526 | */ | |
2527 | static int __init specialix_init_module(void) | |
2528 | { | |
2529 | int i; | |
2530 | ||
2531 | func_enter(); | |
2532 | ||
1da177e4 LT |
2533 | if (iobase[0] || iobase[1] || iobase[2] || iobase[3]) { |
2534 | for(i = 0; i < SX_NBOARD; i++) { | |
2535 | sx_board[i].base = iobase[i]; | |
2536 | sx_board[i].irq = irq[i]; | |
2537 | sx_board[i].count= 0; | |
2538 | } | |
2539 | } | |
2540 | ||
2541 | func_exit(); | |
2542 | ||
2543 | return specialix_init(); | |
2544 | } | |
d61780c0 | 2545 | |
1da177e4 LT |
2546 | static void __exit specialix_exit_module(void) |
2547 | { | |
2548 | int i; | |
d61780c0 | 2549 | |
1da177e4 LT |
2550 | func_enter(); |
2551 | ||
2552 | sx_release_drivers(); | |
2553 | for (i = 0; i < SX_NBOARD; i++) | |
d61780c0 | 2554 | if (sx_board[i].flags & SX_BOARD_PRESENT) |
1da177e4 LT |
2555 | sx_release_io_range(&sx_board[i]); |
2556 | #ifdef SPECIALIX_TIMER | |
2557 | del_timer (&missed_irq_timer); | |
2558 | #endif | |
2559 | ||
2560 | func_exit(); | |
2561 | } | |
2562 | ||
7691030b CS |
2563 | static struct pci_device_id specialx_pci_tbl[] __devinitdata = { |
2564 | { PCI_DEVICE(PCI_VENDOR_ID_SPECIALIX, PCI_DEVICE_ID_SPECIALIX_IO8) }, | |
2565 | { } | |
2566 | }; | |
2567 | MODULE_DEVICE_TABLE(pci, specialx_pci_tbl); | |
2568 | ||
1da177e4 LT |
2569 | module_init(specialix_init_module); |
2570 | module_exit(specialix_exit_module); | |
2571 | ||
2572 | MODULE_LICENSE("GPL"); |