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dm ioctl: only issue uevent on resume if state changed
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / char / specialix.c
blob07ac14d949ce2f12dc94ab6e3b3c0a7ae3a32931
1 /*
2 * specialix.c -- specialix IO8+ multiport serial driver.
3 *
4 * Copyright (C) 1997 Roger Wolff (R.E.Wolff@BitWizard.nl)
5 * Copyright (C) 1994-1996 Dmitry Gorodchanin (pgmdsg@ibi.com)
6 *
7 * Specialix pays for the development and support of this driver.
8 * Please DO contact io8-linux@specialix.co.uk if you require
9 * support. But please read the documentation (specialix.txt)
10 * first.
11 *
12 * This driver was developped in the BitWizard linux device
13 * driver service. If you require a linux device driver for your
14 * product, please contact devices@BitWizard.nl for a quote.
15 *
16 * This code is firmly based on the riscom/8 serial driver,
17 * written by Dmitry Gorodchanin. The specialix IO8+ card
18 * programming information was obtained from the CL-CD1865 Data
19 * Book, and Specialix document number 6200059: IO8+ Hardware
20 * Functional Specification.
21 *
22 * This program is free software; you can redistribute it and/or
23 * modify it under the terms of the GNU General Public License as
24 * published by the Free Software Foundation; either version 2 of
25 * the License, or (at your option) any later version.
26 *
27 * This program is distributed in the hope that it will be
28 * useful, but WITHOUT ANY WARRANTY; without even the implied
29 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
30 * PURPOSE. See the GNU General Public License for more details.
31 *
32 * You should have received a copy of the GNU General Public
33 * License along with this program; if not, write to the Free
34 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139,
35 * USA.
36 *
37 * Revision history:
38 *
39 * Revision 1.0: April 1st 1997.
40 * Initial release for alpha testing.
41 * Revision 1.1: April 14th 1997.
42 * Incorporated Richard Hudsons suggestions,
43 * removed some debugging printk's.
44 * Revision 1.2: April 15th 1997.
45 * Ported to 2.1.x kernels.
46 * Revision 1.3: April 17th 1997
47 * Backported to 2.0. (Compatibility macros).
48 * Revision 1.4: April 18th 1997
49 * Fixed DTR/RTS bug that caused the card to indicate
50 * "don't send data" to a modem after the password prompt.
51 * Fixed bug for premature (fake) interrupts.
52 * Revision 1.5: April 19th 1997
53 * fixed a minor typo in the header file, cleanup a little.
54 * performance warnings are now MAXed at once per minute.
55 * Revision 1.6: May 23 1997
56 * Changed the specialix=... format to include interrupt.
57 * Revision 1.7: May 27 1997
58 * Made many more debug printk's a compile time option.
59 * Revision 1.8: Jul 1 1997
60 * port to linux-2.1.43 kernel.
61 * Revision 1.9: Oct 9 1998
62 * Added stuff for the IO8+/PCI version.
63 * Revision 1.10: Oct 22 1999 / Jan 21 2000.
64 * Added stuff for setserial.
65 * Nicolas Mailhot (Nicolas.Mailhot@email.enst.fr)
66 *
67 */
68
69 #define VERSION "1.11"
70
71
72 /*
73 * There is a bunch of documentation about the card, jumpers, config
74 * settings, restrictions, cables, device names and numbers in
75 * Documentation/serial/specialix.txt
76 */
77
78 #include <linux/module.h>
79
80 #include <linux/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>
87 #include <linux/tty_flip.h>
88 #include <linux/mm.h>
89 #include <linux/serial.h>
90 #include <linux/smp_lock.h>
91 #include <linux/fcntl.h>
92 #include <linux/major.h>
93 #include <linux/delay.h>
94 #include <linux/pci.h>
95 #include <linux/init.h>
96 #include <linux/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 static int sx_rtscts;
115
116 #ifdef DEBUG
117 #define dprintk(f, str...) if (sx_debug & f) printk(str)
118 #else
119 #define dprintk(f, str...) /* nothing */
120 #endif
121
122 #define SX_DEBUG_FLOW 0x0001
123 #define SX_DEBUG_DATA 0x0002
124 #define SX_DEBUG_PROBE 0x0004
125 #define SX_DEBUG_CHAN 0x0008
126 #define SX_DEBUG_INIT 0x0010
127 #define SX_DEBUG_RX 0x0020
128 #define SX_DEBUG_TX 0x0040
129 #define SX_DEBUG_IRQ 0x0080
130 #define SX_DEBUG_OPEN 0x0100
131 #define SX_DEBUG_TERMIOS 0x0200
132 #define SX_DEBUG_SIGNALS 0x0400
133 #define SX_DEBUG_FIFO 0x0800
134
135
136 #define func_enter() dprintk(SX_DEBUG_FLOW, "io8: enter %s\n", __func__)
137 #define func_exit() dprintk(SX_DEBUG_FLOW, "io8: exit %s\n", __func__)
138
139
140 /* Configurable options: */
141
142 /* Am I paranoid or not ? ;-) */
143 #define SPECIALIX_PARANOIA_CHECK
144
145 /*
146 * The following defines are mostly for testing purposes. But if you need
147 * some nice reporting in your syslog, you can define them also.
148 */
149 #undef SX_REPORT_FIFO
150 #undef SX_REPORT_OVERRUN
151
152
153
154
155 #define SPECIALIX_LEGAL_FLAGS \
156 (ASYNC_HUP_NOTIFY | ASYNC_SAK | ASYNC_SPLIT_TERMIOS | \
157 ASYNC_SPD_HI | ASYNC_SPEED_VHI | ASYNC_SESSION_LOCKOUT | \
158 ASYNC_PGRP_LOCKOUT | ASYNC_CALLOUT_NOHUP)
159
160 static struct tty_driver *specialix_driver;
161
162 static struct specialix_board sx_board[SX_NBOARD] = {
163 { 0, SX_IOBASE1, 9, },
164 { 0, SX_IOBASE2, 11, },
165 { 0, SX_IOBASE3, 12, },
166 { 0, SX_IOBASE4, 15, },
167 };
168
169 static struct specialix_port sx_port[SX_NBOARD * SX_NPORT];
170
171
172 static int sx_paranoia_check(struct specialix_port const *port,
173 char *name, const char *routine)
174 {
175 #ifdef SPECIALIX_PARANOIA_CHECK
176 static const char *badmagic = KERN_ERR
177 "sx: Warning: bad specialix port magic number for device %s in %s\n";
178 static const char *badinfo = KERN_ERR
179 "sx: Warning: null specialix port for device %s in %s\n";
180
181 if (!port) {
182 printk(badinfo, name, routine);
183 return 1;
184 }
185 if (port->magic != SPECIALIX_MAGIC) {
186 printk(badmagic, name, routine);
187 return 1;
188 }
189 #endif
190 return 0;
191 }
192
193
194 /*
195 *
196 * Service functions for specialix IO8+ driver.
197 *
198 */
199
200 /* Get board number from pointer */
201 static inline int board_No(struct specialix_board *bp)
202 {
203 return bp - sx_board;
204 }
205
206
207 /* Get port number from pointer */
208 static inline int port_No(struct specialix_port const *port)
209 {
210 return SX_PORT(port - sx_port);
211 }
212
213
214 /* Get pointer to board from pointer to port */
215 static inline struct specialix_board *port_Board(
216 struct specialix_port const *port)
217 {
218 return &sx_board[SX_BOARD(port - sx_port)];
219 }
220
221
222 /* Input Byte from CL CD186x register */
223 static inline unsigned char sx_in(struct specialix_board *bp,
224 unsigned short reg)
225 {
226 bp->reg = reg | 0x80;
227 outb(reg | 0x80, bp->base + SX_ADDR_REG);
228 return inb(bp->base + SX_DATA_REG);
229 }
230
231
232 /* Output Byte to CL CD186x register */
233 static inline void sx_out(struct specialix_board *bp, unsigned short reg,
234 unsigned char val)
235 {
236 bp->reg = reg | 0x80;
237 outb(reg | 0x80, bp->base + SX_ADDR_REG);
238 outb(val, bp->base + SX_DATA_REG);
239 }
240
241
242 /* Input Byte from CL CD186x register */
243 static inline unsigned char sx_in_off(struct specialix_board *bp,
244 unsigned short reg)
245 {
246 bp->reg = reg;
247 outb(reg, bp->base + SX_ADDR_REG);
248 return inb(bp->base + SX_DATA_REG);
249 }
250
251
252 /* Output Byte to CL CD186x register */
253 static inline void sx_out_off(struct specialix_board *bp,
254 unsigned short reg, unsigned char val)
255 {
256 bp->reg = reg;
257 outb(reg, bp->base + SX_ADDR_REG);
258 outb(val, bp->base + SX_DATA_REG);
259 }
260
261
262 /* Wait for Channel Command Register ready */
263 static void sx_wait_CCR(struct specialix_board *bp)
264 {
265 unsigned long delay, flags;
266 unsigned char ccr;
267
268 for (delay = SX_CCR_TIMEOUT; delay; delay--) {
269 spin_lock_irqsave(&bp->lock, flags);
270 ccr = sx_in(bp, CD186x_CCR);
271 spin_unlock_irqrestore(&bp->lock, flags);
272 if (!ccr)
273 return;
274 udelay(1);
275 }
276
277 printk(KERN_ERR "sx%d: Timeout waiting for CCR.\n", board_No(bp));
278 }
279
280
281 /* Wait for Channel Command Register ready */
282 static void sx_wait_CCR_off(struct specialix_board *bp)
283 {
284 unsigned long delay;
285 unsigned char crr;
286 unsigned long flags;
287
288 for (delay = SX_CCR_TIMEOUT; delay; delay--) {
289 spin_lock_irqsave(&bp->lock, flags);
290 crr = sx_in_off(bp, CD186x_CCR);
291 spin_unlock_irqrestore(&bp->lock, flags);
292 if (!crr)
293 return;
294 udelay(1);
295 }
296
297 printk(KERN_ERR "sx%d: Timeout waiting for CCR.\n", board_No(bp));
298 }
299
300
301 /*
302 * specialix IO8+ IO range functions.
303 */
304
305 static int sx_request_io_range(struct specialix_board *bp)
306 {
307 return request_region(bp->base,
308 bp->flags & SX_BOARD_IS_PCI ? SX_PCI_IO_SPACE : SX_IO_SPACE,
309 "specialix IO8+") == NULL;
310 }
311
312
313 static void sx_release_io_range(struct specialix_board *bp)
314 {
315 release_region(bp->base, bp->flags & SX_BOARD_IS_PCI ?
316 SX_PCI_IO_SPACE : SX_IO_SPACE);
317 }
318
319
320 /* Set the IRQ using the RTS lines that run to the PAL on the board.... */
321 static int sx_set_irq(struct specialix_board *bp)
322 {
323 int virq;
324 int i;
325 unsigned long flags;
326
327 if (bp->flags & SX_BOARD_IS_PCI)
328 return 1;
329 switch (bp->irq) {
330 /* In the same order as in the docs... */
331 case 15:
332 virq = 0;
333 break;
334 case 12:
335 virq = 1;
336 break;
337 case 11:
338 virq = 2;
339 break;
340 case 9:
341 virq = 3;
342 break;
343 default:printk(KERN_ERR
344 "Speclialix: cannot set irq to %d.\n", bp->irq);
345 return 0;
346 }
347 spin_lock_irqsave(&bp->lock, flags);
348 for (i = 0; i < 2; i++) {
349 sx_out(bp, CD186x_CAR, i);
350 sx_out(bp, CD186x_MSVRTS, ((virq >> i) & 0x1)? MSVR_RTS:0);
351 }
352 spin_unlock_irqrestore(&bp->lock, flags);
353 return 1;
354 }
355
356
357 /* Reset and setup CD186x chip */
358 static int sx_init_CD186x(struct specialix_board *bp)
359 {
360 unsigned long flags;
361 int scaler;
362 int rv = 1;
363
364 func_enter();
365 sx_wait_CCR_off(bp); /* Wait for CCR ready */
366 spin_lock_irqsave(&bp->lock, flags);
367 sx_out_off(bp, CD186x_CCR, CCR_HARDRESET); /* Reset CD186x chip */
368 spin_unlock_irqrestore(&bp->lock, flags);
369 msleep(50); /* Delay 0.05 sec */
370 spin_lock_irqsave(&bp->lock, flags);
371 sx_out_off(bp, CD186x_GIVR, SX_ID); /* Set ID for this chip */
372 sx_out_off(bp, CD186x_GICR, 0); /* Clear all bits */
373 sx_out_off(bp, CD186x_PILR1, SX_ACK_MINT); /* Prio for modem intr */
374 sx_out_off(bp, CD186x_PILR2, SX_ACK_TINT); /* Prio for transmitter intr */
375 sx_out_off(bp, CD186x_PILR3, SX_ACK_RINT); /* Prio for receiver intr */
376 /* Set RegAckEn */
377 sx_out_off(bp, CD186x_SRCR, sx_in(bp, CD186x_SRCR) | SRCR_REGACKEN);
378
379 /* Setting up prescaler. We need 4 ticks per 1 ms */
380 scaler = SX_OSCFREQ/SPECIALIX_TPS;
381
382 sx_out_off(bp, CD186x_PPRH, scaler >> 8);
383 sx_out_off(bp, CD186x_PPRL, scaler & 0xff);
384 spin_unlock_irqrestore(&bp->lock, flags);
385
386 if (!sx_set_irq(bp)) {
387 /* Figure out how to pass this along... */
388 printk(KERN_ERR "Cannot set irq to %d.\n", bp->irq);
389 rv = 0;
390 }
391
392 func_exit();
393 return rv;
394 }
395
396
397 static int read_cross_byte(struct specialix_board *bp, int reg, int bit)
398 {
399 int i;
400 int t;
401 unsigned long flags;
402
403 spin_lock_irqsave(&bp->lock, flags);
404 for (i = 0, t = 0; i < 8; i++) {
405 sx_out_off(bp, CD186x_CAR, i);
406 if (sx_in_off(bp, reg) & bit)
407 t |= 1 << i;
408 }
409 spin_unlock_irqrestore(&bp->lock, flags);
410
411 return t;
412 }
413
414
415 /* Main probing routine, also sets irq. */
416 static int sx_probe(struct specialix_board *bp)
417 {
418 unsigned char val1, val2;
419 int rev;
420 int chip;
421
422 func_enter();
423
424 if (sx_request_io_range(bp)) {
425 func_exit();
426 return 1;
427 }
428
429 /* Are the I/O ports here ? */
430 sx_out_off(bp, CD186x_PPRL, 0x5a);
431 udelay(1);
432 val1 = sx_in_off(bp, CD186x_PPRL);
433
434 sx_out_off(bp, CD186x_PPRL, 0xa5);
435 udelay(1);
436 val2 = sx_in_off(bp, CD186x_PPRL);
437
438
439 if (val1 != 0x5a || val2 != 0xa5) {
440 printk(KERN_INFO
441 "sx%d: specialix IO8+ Board at 0x%03x not found.\n",
442 board_No(bp), bp->base);
443 sx_release_io_range(bp);
444 func_exit();
445 return 1;
446 }
447
448 /* Check the DSR lines that Specialix uses as board
449 identification */
450 val1 = read_cross_byte(bp, CD186x_MSVR, MSVR_DSR);
451 val2 = read_cross_byte(bp, CD186x_MSVR, MSVR_RTS);
452 dprintk(SX_DEBUG_INIT,
453 "sx%d: DSR lines are: %02x, rts lines are: %02x\n",
454 board_No(bp), val1, val2);
455
456 /* They managed to switch the bit order between the docs and
457 the IO8+ card. The new PCI card now conforms to old docs.
458 They changed the PCI docs to reflect the situation on the
459 old card. */
460 val2 = (bp->flags & SX_BOARD_IS_PCI)?0x4d : 0xb2;
461 if (val1 != val2) {
462 printk(KERN_INFO
463 "sx%d: specialix IO8+ ID %02x at 0x%03x not found (%02x).\n",
464 board_No(bp), val2, bp->base, val1);
465 sx_release_io_range(bp);
466 func_exit();
467 return 1;
468 }
469
470
471 /* Reset CD186x again */
472 if (!sx_init_CD186x(bp)) {
473 sx_release_io_range(bp);
474 func_exit();
475 return 1;
476 }
477
478 sx_request_io_range(bp);
479 bp->flags |= SX_BOARD_PRESENT;
480
481 /* Chip revcode pkgtype
482 GFRCR SRCR bit 7
483 CD180 rev B 0x81 0
484 CD180 rev C 0x82 0
485 CD1864 rev A 0x82 1
486 CD1865 rev A 0x83 1 -- Do not use!!! Does not work.
487 CD1865 rev B 0x84 1
488 -- Thanks to Gwen Wang, Cirrus Logic.
489 */
490
491 switch (sx_in_off(bp, CD186x_GFRCR)) {
492 case 0x82:
493 chip = 1864;
494 rev = 'A';
495 break;
496 case 0x83:
497 chip = 1865;
498 rev = 'A';
499 break;
500 case 0x84:
501 chip = 1865;
502 rev = 'B';
503 break;
504 case 0x85:
505 chip = 1865;
506 rev = 'C';
507 break; /* Does not exist at this time */
508 default:
509 chip = -1;
510 rev = 'x';
511 }
512
513 dprintk(SX_DEBUG_INIT, " GFCR = 0x%02x\n", sx_in_off(bp, CD186x_GFRCR));
514
515 printk(KERN_INFO
516 "sx%d: specialix IO8+ board detected at 0x%03x, IRQ %d, CD%d Rev. %c.\n",
517 board_No(bp), bp->base, bp->irq, chip, rev);
518
519 func_exit();
520 return 0;
521 }
522
523 /*
524 *
525 * Interrupt processing routines.
526 * */
527
528 static struct specialix_port *sx_get_port(struct specialix_board *bp,
529 unsigned char const *what)
530 {
531 unsigned char channel;
532 struct specialix_port *port = NULL;
533
534 channel = sx_in(bp, CD186x_GICR) >> GICR_CHAN_OFF;
535 dprintk(SX_DEBUG_CHAN, "channel: %d\n", channel);
536 if (channel < CD186x_NCH) {
537 port = &sx_port[board_No(bp) * SX_NPORT + channel];
538 dprintk(SX_DEBUG_CHAN, "port: %d %p flags: 0x%lx\n",
539 board_No(bp) * SX_NPORT + channel, port,
540 port->port.flags & ASYNC_INITIALIZED);
541
542 if (port->port.flags & ASYNC_INITIALIZED) {
543 dprintk(SX_DEBUG_CHAN, "port: %d %p\n", channel, port);
544 func_exit();
545 return port;
546 }
547 }
548 printk(KERN_INFO "sx%d: %s interrupt from invalid port %d\n",
549 board_No(bp), what, channel);
550 return NULL;
551 }
552
553
554 static void sx_receive_exc(struct specialix_board *bp)
555 {
556 struct specialix_port *port;
557 struct tty_struct *tty;
558 unsigned char status;
559 unsigned char ch, flag;
560
561 func_enter();
562
563 port = sx_get_port(bp, "Receive");
564 if (!port) {
565 dprintk(SX_DEBUG_RX, "Hmm, couldn't find port.\n");
566 func_exit();
567 return;
568 }
569 tty = port->port.tty;
570
571 status = sx_in(bp, CD186x_RCSR);
572
573 dprintk(SX_DEBUG_RX, "status: 0x%x\n", status);
574 if (status & RCSR_OE) {
575 port->overrun++;
576 dprintk(SX_DEBUG_FIFO,
577 "sx%d: port %d: Overrun. Total %ld overruns.\n",
578 board_No(bp), port_No(port), port->overrun);
579 }
580 status &= port->mark_mask;
581
582 /* This flip buffer check needs to be below the reading of the
583 status register to reset the chip's IRQ.... */
584 if (tty_buffer_request_room(tty, 1) == 0) {
585 dprintk(SX_DEBUG_FIFO,
586 "sx%d: port %d: Working around flip buffer overflow.\n",
587 board_No(bp), port_No(port));
588 func_exit();
589 return;
590 }
591
592 ch = sx_in(bp, CD186x_RDR);
593 if (!status) {
594 func_exit();
595 return;
596 }
597 if (status & RCSR_TOUT) {
598 printk(KERN_INFO
599 "sx%d: port %d: Receiver timeout. Hardware problems ?\n",
600 board_No(bp), port_No(port));
601 func_exit();
602 return;
603
604 } else if (status & RCSR_BREAK) {
605 dprintk(SX_DEBUG_RX, "sx%d: port %d: Handling break...\n",
606 board_No(bp), port_No(port));
607 flag = TTY_BREAK;
608 if (port->port.flags & ASYNC_SAK)
609 do_SAK(tty);
610
611 } else if (status & RCSR_PE)
612 flag = TTY_PARITY;
613
614 else if (status & RCSR_FE)
615 flag = TTY_FRAME;
616
617 else if (status & RCSR_OE)
618 flag = TTY_OVERRUN;
619
620 else
621 flag = TTY_NORMAL;
622
623 if (tty_insert_flip_char(tty, ch, flag))
624 tty_flip_buffer_push(tty);
625 func_exit();
626 }
627
628
629 static void sx_receive(struct specialix_board *bp)
630 {
631 struct specialix_port *port;
632 struct tty_struct *tty;
633 unsigned char count;
634
635 func_enter();
636
637 port = sx_get_port(bp, "Receive");
638 if (port == NULL) {
639 dprintk(SX_DEBUG_RX, "Hmm, couldn't find port.\n");
640 func_exit();
641 return;
642 }
643 tty = port->port.tty;
644
645 count = sx_in(bp, CD186x_RDCR);
646 dprintk(SX_DEBUG_RX, "port: %p: count: %d\n", port, count);
647 port->hits[count > 8 ? 9 : count]++;
648
649 while (count--)
650 tty_insert_flip_char(tty, sx_in(bp, CD186x_RDR), TTY_NORMAL);
651 tty_flip_buffer_push(tty);
652 func_exit();
653 }
654
655
656 static void sx_transmit(struct specialix_board *bp)
657 {
658 struct specialix_port *port;
659 struct tty_struct *tty;
660 unsigned char count;
661
662 func_enter();
663 port = sx_get_port(bp, "Transmit");
664 if (port == NULL) {
665 func_exit();
666 return;
667 }
668 dprintk(SX_DEBUG_TX, "port: %p\n", port);
669 tty = port->port.tty;
670
671 if (port->IER & IER_TXEMPTY) {
672 /* FIFO drained */
673 sx_out(bp, CD186x_CAR, port_No(port));
674 port->IER &= ~IER_TXEMPTY;
675 sx_out(bp, CD186x_IER, port->IER);
676 func_exit();
677 return;
678 }
679
680 if ((port->xmit_cnt <= 0 && !port->break_length)
681 || tty->stopped || tty->hw_stopped) {
682 sx_out(bp, CD186x_CAR, port_No(port));
683 port->IER &= ~IER_TXRDY;
684 sx_out(bp, CD186x_IER, port->IER);
685 func_exit();
686 return;
687 }
688
689 if (port->break_length) {
690 if (port->break_length > 0) {
691 if (port->COR2 & COR2_ETC) {
692 sx_out(bp, CD186x_TDR, CD186x_C_ESC);
693 sx_out(bp, CD186x_TDR, CD186x_C_SBRK);
694 port->COR2 &= ~COR2_ETC;
695 }
696 count = min_t(int, port->break_length, 0xff);
697 sx_out(bp, CD186x_TDR, CD186x_C_ESC);
698 sx_out(bp, CD186x_TDR, CD186x_C_DELAY);
699 sx_out(bp, CD186x_TDR, count);
700 port->break_length -= count;
701 if (port->break_length == 0)
702 port->break_length--;
703 } else {
704 sx_out(bp, CD186x_TDR, CD186x_C_ESC);
705 sx_out(bp, CD186x_TDR, CD186x_C_EBRK);
706 sx_out(bp, CD186x_COR2, port->COR2);
707 sx_wait_CCR(bp);
708 sx_out(bp, CD186x_CCR, CCR_CORCHG2);
709 port->break_length = 0;
710 }
711
712 func_exit();
713 return;
714 }
715
716 count = CD186x_NFIFO;
717 do {
718 sx_out(bp, CD186x_TDR, port->xmit_buf[port->xmit_tail++]);
719 port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE-1);
720 if (--port->xmit_cnt <= 0)
721 break;
722 } while (--count > 0);
723
724 if (port->xmit_cnt <= 0) {
725 sx_out(bp, CD186x_CAR, port_No(port));
726 port->IER &= ~IER_TXRDY;
727 sx_out(bp, CD186x_IER, port->IER);
728 }
729 if (port->xmit_cnt <= port->wakeup_chars)
730 tty_wakeup(tty);
731
732 func_exit();
733 }
734
735
736 static void sx_check_modem(struct specialix_board *bp)
737 {
738 struct specialix_port *port;
739 struct tty_struct *tty;
740 unsigned char mcr;
741 int msvr_cd;
742
743 dprintk(SX_DEBUG_SIGNALS, "Modem intr. ");
744 port = sx_get_port(bp, "Modem");
745 if (port == NULL)
746 return;
747
748 tty = port->port.tty;
749
750 mcr = sx_in(bp, CD186x_MCR);
751
752 if ((mcr & MCR_CDCHG)) {
753 dprintk(SX_DEBUG_SIGNALS, "CD just changed... ");
754 msvr_cd = sx_in(bp, CD186x_MSVR) & MSVR_CD;
755 if (msvr_cd) {
756 dprintk(SX_DEBUG_SIGNALS, "Waking up guys in open.\n");
757 wake_up_interruptible(&port->port.open_wait);
758 } else {
759 dprintk(SX_DEBUG_SIGNALS, "Sending HUP.\n");
760 tty_hangup(tty);
761 }
762 }
763
764 #ifdef SPECIALIX_BRAIN_DAMAGED_CTS
765 if (mcr & MCR_CTSCHG) {
766 if (sx_in(bp, CD186x_MSVR) & MSVR_CTS) {
767 tty->hw_stopped = 0;
768 port->IER |= IER_TXRDY;
769 if (port->xmit_cnt <= port->wakeup_chars)
770 tty_wakeup(tty);
771 } else {
772 tty->hw_stopped = 1;
773 port->IER &= ~IER_TXRDY;
774 }
775 sx_out(bp, CD186x_IER, port->IER);
776 }
777 if (mcr & MCR_DSSXHG) {
778 if (sx_in(bp, CD186x_MSVR) & MSVR_DSR) {
779 tty->hw_stopped = 0;
780 port->IER |= IER_TXRDY;
781 if (port->xmit_cnt <= port->wakeup_chars)
782 tty_wakeup(tty);
783 } else {
784 tty->hw_stopped = 1;
785 port->IER &= ~IER_TXRDY;
786 }
787 sx_out(bp, CD186x_IER, port->IER);
788 }
789 #endif /* SPECIALIX_BRAIN_DAMAGED_CTS */
790
791 /* Clear change bits */
792 sx_out(bp, CD186x_MCR, 0);
793 }
794
795
796 /* The main interrupt processing routine */
797 static irqreturn_t sx_interrupt(int dummy, void *dev_id)
798 {
799 unsigned char status;
800 unsigned char ack;
801 struct specialix_board *bp = dev_id;
802 unsigned long loop = 0;
803 int saved_reg;
804 unsigned long flags;
805
806 func_enter();
807
808 spin_lock_irqsave(&bp->lock, flags);
809
810 dprintk(SX_DEBUG_FLOW, "enter %s port %d room: %ld\n", __func__,
811 port_No(sx_get_port(bp, "INT")),
812 SERIAL_XMIT_SIZE - sx_get_port(bp, "ITN")->xmit_cnt - 1);
813 if (!(bp->flags & SX_BOARD_ACTIVE)) {
814 dprintk(SX_DEBUG_IRQ, "sx: False interrupt. irq %d.\n",
815 bp->irq);
816 spin_unlock_irqrestore(&bp->lock, flags);
817 func_exit();
818 return IRQ_NONE;
819 }
820
821 saved_reg = bp->reg;
822
823 while (++loop < 16) {
824 status = sx_in(bp, CD186x_SRSR) &
825 (SRSR_RREQint | SRSR_TREQint | SRSR_MREQint);
826 if (status == 0)
827 break;
828 if (status & SRSR_RREQint) {
829 ack = sx_in(bp, CD186x_RRAR);
830
831 if (ack == (SX_ID | GIVR_IT_RCV))
832 sx_receive(bp);
833 else if (ack == (SX_ID | GIVR_IT_REXC))
834 sx_receive_exc(bp);
835 else
836 printk(KERN_ERR
837 "sx%d: status: 0x%x Bad receive ack 0x%02x.\n",
838 board_No(bp), status, ack);
839
840 } else if (status & SRSR_TREQint) {
841 ack = sx_in(bp, CD186x_TRAR);
842
843 if (ack == (SX_ID | GIVR_IT_TX))
844 sx_transmit(bp);
845 else
846 printk(KERN_ERR "sx%d: status: 0x%x Bad transmit ack 0x%02x. port: %d\n",
847 board_No(bp), status, ack,
848 port_No(sx_get_port(bp, "Int")));
849 } else if (status & SRSR_MREQint) {
850 ack = sx_in(bp, CD186x_MRAR);
851
852 if (ack == (SX_ID | GIVR_IT_MODEM))
853 sx_check_modem(bp);
854 else
855 printk(KERN_ERR
856 "sx%d: status: 0x%x Bad modem ack 0x%02x.\n",
857 board_No(bp), status, ack);
858
859 }
860
861 sx_out(bp, CD186x_EOIR, 0); /* Mark end of interrupt */
862 }
863 bp->reg = saved_reg;
864 outb(bp->reg, bp->base + SX_ADDR_REG);
865 spin_unlock_irqrestore(&bp->lock, flags);
866 func_exit();
867 return IRQ_HANDLED;
868 }
869
870
871 /*
872 * Routines for open & close processing.
873 */
874
875 static void turn_ints_off(struct specialix_board *bp)
876 {
877 unsigned long flags;
878
879 func_enter();
880 spin_lock_irqsave(&bp->lock, flags);
881 (void) sx_in_off(bp, 0); /* Turn off interrupts. */
882 spin_unlock_irqrestore(&bp->lock, flags);
883
884 func_exit();
885 }
886
887 static void turn_ints_on(struct specialix_board *bp)
888 {
889 unsigned long flags;
890
891 func_enter();
892
893 spin_lock_irqsave(&bp->lock, flags);
894 (void) sx_in(bp, 0); /* Turn ON interrupts. */
895 spin_unlock_irqrestore(&bp->lock, flags);
896
897 func_exit();
898 }
899
900
901 /* Called with disabled interrupts */
902 static int sx_setup_board(struct specialix_board *bp)
903 {
904 int error;
905
906 if (bp->flags & SX_BOARD_ACTIVE)
907 return 0;
908
909 if (bp->flags & SX_BOARD_IS_PCI)
910 error = request_irq(bp->irq, sx_interrupt,
911 IRQF_DISABLED | IRQF_SHARED, "specialix IO8+", bp);
912 else
913 error = request_irq(bp->irq, sx_interrupt,
914 IRQF_DISABLED, "specialix IO8+", bp);
915
916 if (error)
917 return error;
918
919 turn_ints_on(bp);
920 bp->flags |= SX_BOARD_ACTIVE;
921
922 return 0;
923 }
924
925
926 /* Called with disabled interrupts */
927 static void sx_shutdown_board(struct specialix_board *bp)
928 {
929 func_enter();
930
931 if (!(bp->flags & SX_BOARD_ACTIVE)) {
932 func_exit();
933 return;
934 }
935
936 bp->flags &= ~SX_BOARD_ACTIVE;
937
938 dprintk(SX_DEBUG_IRQ, "Freeing IRQ%d for board %d.\n",
939 bp->irq, board_No(bp));
940 free_irq(bp->irq, bp);
941 turn_ints_off(bp);
942 func_exit();
943 }
944
945 static unsigned int sx_crtscts(struct tty_struct *tty)
946 {
947 if (sx_rtscts)
948 return C_CRTSCTS(tty);
949 return 1;
950 }
951
952 /*
953 * Setting up port characteristics.
954 * Must be called with disabled interrupts
955 */
956 static void sx_change_speed(struct specialix_board *bp,
957 struct specialix_port *port)
958 {
959 struct tty_struct *tty;
960 unsigned long baud;
961 long tmp;
962 unsigned char cor1 = 0, cor3 = 0;
963 unsigned char mcor1 = 0, mcor2 = 0;
964 static unsigned long again;
965 unsigned long flags;
966
967 func_enter();
968
969 tty = port->port.tty;
970 if (!tty || !tty->termios) {
971 func_exit();
972 return;
973 }
974
975 port->IER = 0;
976 port->COR2 = 0;
977 /* Select port on the board */
978 spin_lock_irqsave(&bp->lock, flags);
979 sx_out(bp, CD186x_CAR, port_No(port));
980
981 /* The Specialix board doens't implement the RTS lines.
982 They are used to set the IRQ level. Don't touch them. */
983 if (sx_crtscts(tty))
984 port->MSVR = MSVR_DTR | (sx_in(bp, CD186x_MSVR) & MSVR_RTS);
985 else
986 port->MSVR = (sx_in(bp, CD186x_MSVR) & MSVR_RTS);
987 spin_unlock_irqrestore(&bp->lock, flags);
988 dprintk(SX_DEBUG_TERMIOS, "sx: got MSVR=%02x.\n", port->MSVR);
989 baud = tty_get_baud_rate(tty);
990
991 if (baud == 38400) {
992 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
993 baud = 57600;
994 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
995 baud = 115200;
996 }
997
998 if (!baud) {
999 /* Drop DTR & exit */
1000 dprintk(SX_DEBUG_TERMIOS, "Dropping DTR... Hmm....\n");
1001 if (!sx_crtscts(tty)) {
1002 port->MSVR &= ~MSVR_DTR;
1003 spin_lock_irqsave(&bp->lock, flags);
1004 sx_out(bp, CD186x_MSVR, port->MSVR);
1005 spin_unlock_irqrestore(&bp->lock, flags);
1006 } else
1007 dprintk(SX_DEBUG_TERMIOS, "Can't drop DTR: no DTR.\n");
1008 return;
1009 } else {
1010 /* Set DTR on */
1011 if (!sx_crtscts(tty))
1012 port->MSVR |= MSVR_DTR;
1013 }
1014
1015 /*
1016 * Now we must calculate some speed depended things
1017 */
1018
1019 /* Set baud rate for port */
1020 tmp = port->custom_divisor ;
1021 if (tmp)
1022 printk(KERN_INFO
1023 "sx%d: Using custom baud rate divisor %ld. \n"
1024 "This is an untested option, please be careful.\n",
1025 port_No(port), tmp);
1026 else
1027 tmp = (((SX_OSCFREQ + baud/2) / baud + CD186x_TPC/2) /
1028 CD186x_TPC);
1029
1030 if (tmp < 0x10 && time_before(again, jiffies)) {
1031 again = jiffies + HZ * 60;
1032 /* Page 48 of version 2.0 of the CL-CD1865 databook */
1033 if (tmp >= 12) {
1034 printk(KERN_INFO "sx%d: Baud rate divisor is %ld. \n"
1035 "Performance degradation is possible.\n"
1036 "Read specialix.txt for more info.\n",
1037 port_No(port), tmp);
1038 } else {
1039 printk(KERN_INFO "sx%d: Baud rate divisor is %ld. \n"
1040 "Warning: overstressing Cirrus chip. This might not work.\n"
1041 "Read specialix.txt for more info.\n", port_No(port), tmp);
1042 }
1043 }
1044 spin_lock_irqsave(&bp->lock, flags);
1045 sx_out(bp, CD186x_RBPRH, (tmp >> 8) & 0xff);
1046 sx_out(bp, CD186x_TBPRH, (tmp >> 8) & 0xff);
1047 sx_out(bp, CD186x_RBPRL, tmp & 0xff);
1048 sx_out(bp, CD186x_TBPRL, tmp & 0xff);
1049 spin_unlock_irqrestore(&bp->lock, flags);
1050 if (port->custom_divisor)
1051 baud = (SX_OSCFREQ + port->custom_divisor/2) /
1052 port->custom_divisor;
1053 baud = (baud + 5) / 10; /* Estimated CPS */
1054
1055 /* Two timer ticks seems enough to wakeup something like SLIP driver */
1056 tmp = ((baud + HZ/2) / HZ) * 2 - CD186x_NFIFO;
1057 port->wakeup_chars = (tmp < 0) ? 0 : ((tmp >= SERIAL_XMIT_SIZE) ?
1058 SERIAL_XMIT_SIZE - 1 : tmp);
1059
1060 /* Receiver timeout will be transmission time for 1.5 chars */
1061 tmp = (SPECIALIX_TPS + SPECIALIX_TPS/2 + baud/2) / baud;
1062 tmp = (tmp > 0xff) ? 0xff : tmp;
1063 spin_lock_irqsave(&bp->lock, flags);
1064 sx_out(bp, CD186x_RTPR, tmp);
1065 spin_unlock_irqrestore(&bp->lock, flags);
1066 switch (C_CSIZE(tty)) {
1067 case CS5:
1068 cor1 |= COR1_5BITS;
1069 break;
1070 case CS6:
1071 cor1 |= COR1_6BITS;
1072 break;
1073 case CS7:
1074 cor1 |= COR1_7BITS;
1075 break;
1076 case CS8:
1077 cor1 |= COR1_8BITS;
1078 break;
1079 }
1080
1081 if (C_CSTOPB(tty))
1082 cor1 |= COR1_2SB;
1083
1084 cor1 |= COR1_IGNORE;
1085 if (C_PARENB(tty)) {
1086 cor1 |= COR1_NORMPAR;
1087 if (C_PARODD(tty))
1088 cor1 |= COR1_ODDP;
1089 if (I_INPCK(tty))
1090 cor1 &= ~COR1_IGNORE;
1091 }
1092 /* Set marking of some errors */
1093 port->mark_mask = RCSR_OE | RCSR_TOUT;
1094 if (I_INPCK(tty))
1095 port->mark_mask |= RCSR_FE | RCSR_PE;
1096 if (I_BRKINT(tty) || I_PARMRK(tty))
1097 port->mark_mask |= RCSR_BREAK;
1098 if (I_IGNPAR(tty))
1099 port->mark_mask &= ~(RCSR_FE | RCSR_PE);
1100 if (I_IGNBRK(tty)) {
1101 port->mark_mask &= ~RCSR_BREAK;
1102 if (I_IGNPAR(tty))
1103 /* Real raw mode. Ignore all */
1104 port->mark_mask &= ~RCSR_OE;
1105 }
1106 /* Enable Hardware Flow Control */
1107 if (C_CRTSCTS(tty)) {
1108 #ifdef SPECIALIX_BRAIN_DAMAGED_CTS
1109 port->IER |= IER_DSR | IER_CTS;
1110 mcor1 |= MCOR1_DSRZD | MCOR1_CTSZD;
1111 mcor2 |= MCOR2_DSROD | MCOR2_CTSOD;
1112 spin_lock_irqsave(&bp->lock, flags);
1113 tty->hw_stopped = !(sx_in(bp, CD186x_MSVR) &
1114 (MSVR_CTS|MSVR_DSR));
1115 spin_unlock_irqrestore(&bp->lock, flags);
1116 #else
1117 port->COR2 |= COR2_CTSAE;
1118 #endif
1119 }
1120 /* Enable Software Flow Control. FIXME: I'm not sure about this */
1121 /* Some people reported that it works, but I still doubt it */
1122 if (I_IXON(tty)) {
1123 port->COR2 |= COR2_TXIBE;
1124 cor3 |= (COR3_FCT | COR3_SCDE);
1125 if (I_IXANY(tty))
1126 port->COR2 |= COR2_IXM;
1127 spin_lock_irqsave(&bp->lock, flags);
1128 sx_out(bp, CD186x_SCHR1, START_CHAR(tty));
1129 sx_out(bp, CD186x_SCHR2, STOP_CHAR(tty));
1130 sx_out(bp, CD186x_SCHR3, START_CHAR(tty));
1131 sx_out(bp, CD186x_SCHR4, STOP_CHAR(tty));
1132 spin_unlock_irqrestore(&bp->lock, flags);
1133 }
1134 if (!C_CLOCAL(tty)) {
1135 /* Enable CD check */
1136 port->IER |= IER_CD;
1137 mcor1 |= MCOR1_CDZD;
1138 mcor2 |= MCOR2_CDOD;
1139 }
1140
1141 if (C_CREAD(tty))
1142 /* Enable receiver */
1143 port->IER |= IER_RXD;
1144
1145 /* Set input FIFO size (1-8 bytes) */
1146 cor3 |= sx_rxfifo;
1147 /* Setting up CD186x channel registers */
1148 spin_lock_irqsave(&bp->lock, flags);
1149 sx_out(bp, CD186x_COR1, cor1);
1150 sx_out(bp, CD186x_COR2, port->COR2);
1151 sx_out(bp, CD186x_COR3, cor3);
1152 spin_unlock_irqrestore(&bp->lock, flags);
1153 /* Make CD186x know about registers change */
1154 sx_wait_CCR(bp);
1155 spin_lock_irqsave(&bp->lock, flags);
1156 sx_out(bp, CD186x_CCR, CCR_CORCHG1 | CCR_CORCHG2 | CCR_CORCHG3);
1157 /* Setting up modem option registers */
1158 dprintk(SX_DEBUG_TERMIOS, "Mcor1 = %02x, mcor2 = %02x.\n",
1159 mcor1, mcor2);
1160 sx_out(bp, CD186x_MCOR1, mcor1);
1161 sx_out(bp, CD186x_MCOR2, mcor2);
1162 spin_unlock_irqrestore(&bp->lock, flags);
1163 /* Enable CD186x transmitter & receiver */
1164 sx_wait_CCR(bp);
1165 spin_lock_irqsave(&bp->lock, flags);
1166 sx_out(bp, CD186x_CCR, CCR_TXEN | CCR_RXEN);
1167 /* Enable interrupts */
1168 sx_out(bp, CD186x_IER, port->IER);
1169 /* And finally set the modem lines... */
1170 sx_out(bp, CD186x_MSVR, port->MSVR);
1171 spin_unlock_irqrestore(&bp->lock, flags);
1172
1173 func_exit();
1174 }
1175
1176
1177 /* Must be called with interrupts enabled */
1178 static int sx_setup_port(struct specialix_board *bp,
1179 struct specialix_port *port)
1180 {
1181 unsigned long flags;
1182
1183 func_enter();
1184
1185 if (port->port.flags & ASYNC_INITIALIZED) {
1186 func_exit();
1187 return 0;
1188 }
1189
1190 if (!port->xmit_buf) {
1191 /* We may sleep in get_zeroed_page() */
1192 unsigned long tmp;
1193
1194 tmp = get_zeroed_page(GFP_KERNEL);
1195 if (tmp == 0L) {
1196 func_exit();
1197 return -ENOMEM;
1198 }
1199
1200 if (port->xmit_buf) {
1201 free_page(tmp);
1202 func_exit();
1203 return -ERESTARTSYS;
1204 }
1205 port->xmit_buf = (unsigned char *) tmp;
1206 }
1207
1208 spin_lock_irqsave(&port->lock, flags);
1209
1210 if (port->port.tty)
1211 clear_bit(TTY_IO_ERROR, &port->port.tty->flags);
1212
1213 port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
1214 sx_change_speed(bp, port);
1215 port->port.flags |= ASYNC_INITIALIZED;
1216
1217 spin_unlock_irqrestore(&port->lock, flags);
1218
1219
1220 func_exit();
1221 return 0;
1222 }
1223
1224
1225 /* Must be called with interrupts disabled */
1226 static void sx_shutdown_port(struct specialix_board *bp,
1227 struct specialix_port *port)
1228 {
1229 struct tty_struct *tty;
1230 int i;
1231 unsigned long flags;
1232
1233 func_enter();
1234
1235 if (!(port->port.flags & ASYNC_INITIALIZED)) {
1236 func_exit();
1237 return;
1238 }
1239
1240 if (sx_debug & SX_DEBUG_FIFO) {
1241 dprintk(SX_DEBUG_FIFO,
1242 "sx%d: port %d: %ld overruns, FIFO hits [ ",
1243 board_No(bp), port_No(port), port->overrun);
1244 for (i = 0; i < 10; i++)
1245 dprintk(SX_DEBUG_FIFO, "%ld ", port->hits[i]);
1246 dprintk(SX_DEBUG_FIFO, "].\n");
1247 }
1248
1249 if (port->xmit_buf) {
1250 free_page((unsigned long) port->xmit_buf);
1251 port->xmit_buf = NULL;
1252 }
1253
1254 /* Select port */
1255 spin_lock_irqsave(&bp->lock, flags);
1256 sx_out(bp, CD186x_CAR, port_No(port));
1257
1258 tty = port->port.tty;
1259 if (tty == NULL || C_HUPCL(tty)) {
1260 /* Drop DTR */
1261 sx_out(bp, CD186x_MSVDTR, 0);
1262 }
1263 spin_unlock_irqrestore(&bp->lock, flags);
1264 /* Reset port */
1265 sx_wait_CCR(bp);
1266 spin_lock_irqsave(&bp->lock, flags);
1267 sx_out(bp, CD186x_CCR, CCR_SOFTRESET);
1268 /* Disable all interrupts from this port */
1269 port->IER = 0;
1270 sx_out(bp, CD186x_IER, port->IER);
1271 spin_unlock_irqrestore(&bp->lock, flags);
1272 if (tty)
1273 set_bit(TTY_IO_ERROR, &tty->flags);
1274 port->port.flags &= ~ASYNC_INITIALIZED;
1275
1276 if (!bp->count)
1277 sx_shutdown_board(bp);
1278 func_exit();
1279 }
1280
1281
1282 static int block_til_ready(struct tty_struct *tty, struct file *filp,
1283 struct specialix_port *port)
1284 {
1285 DECLARE_WAITQUEUE(wait, current);
1286 struct specialix_board *bp = port_Board(port);
1287 int retval;
1288 int do_clocal = 0;
1289 int CD;
1290 unsigned long flags;
1291
1292 func_enter();
1293
1294 /*
1295 * If the device is in the middle of being closed, then block
1296 * until it's done, and then try again.
1297 */
1298 if (tty_hung_up_p(filp) || port->port.flags & ASYNC_CLOSING) {
1299 interruptible_sleep_on(&port->port.close_wait);
1300 if (port->port.flags & ASYNC_HUP_NOTIFY) {
1301 func_exit();
1302 return -EAGAIN;
1303 } else {
1304 func_exit();
1305 return -ERESTARTSYS;
1306 }
1307 }
1308
1309 /*
1310 * If non-blocking mode is set, or the port is not enabled,
1311 * then make the check up front and then exit.
1312 */
1313 if ((filp->f_flags & O_NONBLOCK) ||
1314 (tty->flags & (1 << TTY_IO_ERROR))) {
1315 port->port.flags |= ASYNC_NORMAL_ACTIVE;
1316 func_exit();
1317 return 0;
1318 }
1319
1320 if (C_CLOCAL(tty))
1321 do_clocal = 1;
1322
1323 /*
1324 * Block waiting for the carrier detect and the line to become
1325 * free (i.e., not in use by the callout). While we are in
1326 * this loop, info->count is dropped by one, so that
1327 * rs_close() knows when to free things. We restore it upon
1328 * exit, either normal or abnormal.
1329 */
1330 retval = 0;
1331 add_wait_queue(&port->port.open_wait, &wait);
1332 spin_lock_irqsave(&port->lock, flags);
1333 if (!tty_hung_up_p(filp))
1334 port->port.count--;
1335 spin_unlock_irqrestore(&port->lock, flags);
1336 port->port.blocked_open++;
1337 while (1) {
1338 spin_lock_irqsave(&bp->lock, flags);
1339 sx_out(bp, CD186x_CAR, port_No(port));
1340 CD = sx_in(bp, CD186x_MSVR) & MSVR_CD;
1341 if (sx_crtscts(tty)) {
1342 /* Activate RTS */
1343 port->MSVR |= MSVR_DTR; /* WTF? */
1344 sx_out(bp, CD186x_MSVR, port->MSVR);
1345 } else {
1346 /* Activate DTR */
1347 port->MSVR |= MSVR_DTR;
1348 sx_out(bp, CD186x_MSVR, port->MSVR);
1349 }
1350 spin_unlock_irqrestore(&bp->lock, flags);
1351 set_current_state(TASK_INTERRUPTIBLE);
1352 if (tty_hung_up_p(filp) ||
1353 !(port->port.flags & ASYNC_INITIALIZED)) {
1354 if (port->port.flags & ASYNC_HUP_NOTIFY)
1355 retval = -EAGAIN;
1356 else
1357 retval = -ERESTARTSYS;
1358 break;
1359 }
1360 if (!(port->port.flags & ASYNC_CLOSING) &&
1361 (do_clocal || CD))
1362 break;
1363 if (signal_pending(current)) {
1364 retval = -ERESTARTSYS;
1365 break;
1366 }
1367 schedule();
1368 }
1369
1370 set_current_state(TASK_RUNNING);
1371 remove_wait_queue(&port->port.open_wait, &wait);
1372 spin_lock_irqsave(&port->lock, flags);
1373 if (!tty_hung_up_p(filp))
1374 port->port.count++;
1375 port->port.blocked_open--;
1376 spin_unlock_irqrestore(&port->lock, flags);
1377 if (retval) {
1378 func_exit();
1379 return retval;
1380 }
1381
1382 port->port.flags |= ASYNC_NORMAL_ACTIVE;
1383 func_exit();
1384 return 0;
1385 }
1386
1387
1388 static int sx_open(struct tty_struct *tty, struct file *filp)
1389 {
1390 int board;
1391 int error;
1392 struct specialix_port *port;
1393 struct specialix_board *bp;
1394 int i;
1395 unsigned long flags;
1396
1397 func_enter();
1398
1399 board = SX_BOARD(tty->index);
1400
1401 if (board >= SX_NBOARD || !(sx_board[board].flags & SX_BOARD_PRESENT)) {
1402 func_exit();
1403 return -ENODEV;
1404 }
1405
1406 bp = &sx_board[board];
1407 port = sx_port + board * SX_NPORT + SX_PORT(tty->index);
1408 port->overrun = 0;
1409 for (i = 0; i < 10; i++)
1410 port->hits[i] = 0;
1411
1412 dprintk(SX_DEBUG_OPEN,
1413 "Board = %d, bp = %p, port = %p, portno = %d.\n",
1414 board, bp, port, SX_PORT(tty->index));
1415
1416 if (sx_paranoia_check(port, tty->name, "sx_open")) {
1417 func_enter();
1418 return -ENODEV;
1419 }
1420
1421 error = sx_setup_board(bp);
1422 if (error) {
1423 func_exit();
1424 return error;
1425 }
1426
1427 spin_lock_irqsave(&bp->lock, flags);
1428 port->port.count++;
1429 bp->count++;
1430 tty->driver_data = port;
1431 port->port.tty = tty;
1432 spin_unlock_irqrestore(&bp->lock, flags);
1433
1434 error = sx_setup_port(bp, port);
1435 if (error) {
1436 func_enter();
1437 return error;
1438 }
1439
1440 error = block_til_ready(tty, filp, port);
1441 if (error) {
1442 func_enter();
1443 return error;
1444 }
1445
1446 func_exit();
1447 return 0;
1448 }
1449
1450 static void sx_flush_buffer(struct tty_struct *tty)
1451 {
1452 struct specialix_port *port = tty->driver_data;
1453 unsigned long flags;
1454 struct specialix_board *bp;
1455
1456 func_enter();
1457
1458 if (sx_paranoia_check(port, tty->name, "sx_flush_buffer")) {
1459 func_exit();
1460 return;
1461 }
1462
1463 bp = port_Board(port);
1464 spin_lock_irqsave(&port->lock, flags);
1465 port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
1466 spin_unlock_irqrestore(&port->lock, flags);
1467 tty_wakeup(tty);
1468
1469 func_exit();
1470 }
1471
1472 static void sx_close(struct tty_struct *tty, struct file *filp)
1473 {
1474 struct specialix_port *port = tty->driver_data;
1475 struct specialix_board *bp;
1476 unsigned long flags;
1477 unsigned long timeout;
1478
1479 func_enter();
1480 if (!port || sx_paranoia_check(port, tty->name, "close")) {
1481 func_exit();
1482 return;
1483 }
1484 spin_lock_irqsave(&port->lock, flags);
1485
1486 if (tty_hung_up_p(filp)) {
1487 spin_unlock_irqrestore(&port->lock, flags);
1488 func_exit();
1489 return;
1490 }
1491
1492 bp = port_Board(port);
1493 if (tty->count == 1 && port->port.count != 1) {
1494 printk(KERN_ERR "sx%d: sx_close: bad port count;"
1495 " tty->count is 1, port count is %d\n",
1496 board_No(bp), port->port.count);
1497 port->port.count = 1;
1498 }
1499
1500 if (port->port.count > 1) {
1501 port->port.count--;
1502 bp->count--;
1503
1504 spin_unlock_irqrestore(&port->lock, flags);
1505
1506 func_exit();
1507 return;
1508 }
1509 port->port.flags |= ASYNC_CLOSING;
1510 /*
1511 * Now we wait for the transmit buffer to clear; and we notify
1512 * the line discipline to only process XON/XOFF characters.
1513 */
1514 tty->closing = 1;
1515 spin_unlock_irqrestore(&port->lock, flags);
1516 dprintk(SX_DEBUG_OPEN, "Closing\n");
1517 if (port->port.closing_wait != ASYNC_CLOSING_WAIT_NONE)
1518 tty_wait_until_sent(tty, port->port.closing_wait);
1519 /*
1520 * At this point we stop accepting input. To do this, we
1521 * disable the receive line status interrupts, and tell the
1522 * interrupt driver to stop checking the data ready bit in the
1523 * line status register.
1524 */
1525 dprintk(SX_DEBUG_OPEN, "Closed\n");
1526 port->IER &= ~IER_RXD;
1527 if (port->port.flags & ASYNC_INITIALIZED) {
1528 port->IER &= ~IER_TXRDY;
1529 port->IER |= IER_TXEMPTY;
1530 spin_lock_irqsave(&bp->lock, flags);
1531 sx_out(bp, CD186x_CAR, port_No(port));
1532 sx_out(bp, CD186x_IER, port->IER);
1533 spin_unlock_irqrestore(&bp->lock, flags);
1534 /*
1535 * Before we drop DTR, make sure the UART transmitter
1536 * has completely drained; this is especially
1537 * important if there is a transmit FIFO!
1538 */
1539 timeout = jiffies+HZ;
1540 while (port->IER & IER_TXEMPTY) {
1541 set_current_state(TASK_INTERRUPTIBLE);
1542 msleep_interruptible(jiffies_to_msecs(port->timeout));
1543 if (time_after(jiffies, timeout)) {
1544 printk(KERN_INFO "Timeout waiting for close\n");
1545 break;
1546 }
1547 }
1548
1549 }
1550
1551 if (--bp->count < 0) {
1552 printk(KERN_ERR
1553 "sx%d: sx_shutdown_port: bad board count: %d port: %d\n",
1554 board_No(bp), bp->count, tty->index);
1555 bp->count = 0;
1556 }
1557 if (--port->port.count < 0) {
1558 printk(KERN_ERR
1559 "sx%d: sx_close: bad port count for tty%d: %d\n",
1560 board_No(bp), port_No(port), port->port.count);
1561 port->port.count = 0;
1562 }
1563
1564 sx_shutdown_port(bp, port);
1565 sx_flush_buffer(tty);
1566 tty_ldisc_flush(tty);
1567 spin_lock_irqsave(&port->lock, flags);
1568 tty->closing = 0;
1569 port->port.tty = NULL;
1570 spin_unlock_irqrestore(&port->lock, flags);
1571 if (port->port.blocked_open) {
1572 if (port->port.close_delay)
1573 msleep_interruptible(
1574 jiffies_to_msecs(port->port.close_delay));
1575 wake_up_interruptible(&port->port.open_wait);
1576 }
1577 port->port.flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
1578 wake_up_interruptible(&port->port.close_wait);
1579
1580 func_exit();
1581 }
1582
1583
1584 static int sx_write(struct tty_struct *tty,
1585 const unsigned char *buf, int count)
1586 {
1587 struct specialix_port *port = tty->driver_data;
1588 struct specialix_board *bp;
1589 int c, total = 0;
1590 unsigned long flags;
1591
1592 func_enter();
1593 if (sx_paranoia_check(port, tty->name, "sx_write")) {
1594 func_exit();
1595 return 0;
1596 }
1597
1598 bp = port_Board(port);
1599
1600 if (!port->xmit_buf) {
1601 func_exit();
1602 return 0;
1603 }
1604
1605 while (1) {
1606 spin_lock_irqsave(&port->lock, flags);
1607 c = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt - 1,
1608 SERIAL_XMIT_SIZE - port->xmit_head));
1609 if (c <= 0) {
1610 spin_unlock_irqrestore(&port->lock, flags);
1611 break;
1612 }
1613 memcpy(port->xmit_buf + port->xmit_head, buf, c);
1614 port->xmit_head = (port->xmit_head + c) & (SERIAL_XMIT_SIZE-1);
1615 port->xmit_cnt += c;
1616 spin_unlock_irqrestore(&port->lock, flags);
1617
1618 buf += c;
1619 count -= c;
1620 total += c;
1621 }
1622
1623 spin_lock_irqsave(&bp->lock, flags);
1624 if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped &&
1625 !(port->IER & IER_TXRDY)) {
1626 port->IER |= IER_TXRDY;
1627 sx_out(bp, CD186x_CAR, port_No(port));
1628 sx_out(bp, CD186x_IER, port->IER);
1629 }
1630 spin_unlock_irqrestore(&bp->lock, flags);
1631 func_exit();
1632
1633 return total;
1634 }
1635
1636
1637 static int sx_put_char(struct tty_struct *tty, unsigned char ch)
1638 {
1639 struct specialix_port *port = tty->driver_data;
1640 unsigned long flags;
1641 struct specialix_board *bp;
1642
1643 func_enter();
1644
1645 if (sx_paranoia_check(port, tty->name, "sx_put_char")) {
1646 func_exit();
1647 return 0;
1648 }
1649 dprintk(SX_DEBUG_TX, "check tty: %p %p\n", tty, port->xmit_buf);
1650 if (!port->xmit_buf) {
1651 func_exit();
1652 return 0;
1653 }
1654 bp = port_Board(port);
1655 spin_lock_irqsave(&port->lock, flags);
1656
1657 dprintk(SX_DEBUG_TX, "xmit_cnt: %d xmit_buf: %p\n",
1658 port->xmit_cnt, port->xmit_buf);
1659 if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1 || !port->xmit_buf) {
1660 spin_unlock_irqrestore(&port->lock, flags);
1661 dprintk(SX_DEBUG_TX, "Exit size\n");
1662 func_exit();
1663 return 0;
1664 }
1665 dprintk(SX_DEBUG_TX, "Handle xmit: %p %p\n", port, port->xmit_buf);
1666 port->xmit_buf[port->xmit_head++] = ch;
1667 port->xmit_head &= SERIAL_XMIT_SIZE - 1;
1668 port->xmit_cnt++;
1669 spin_unlock_irqrestore(&port->lock, flags);
1670
1671 func_exit();
1672 return 1;
1673 }
1674
1675
1676 static void sx_flush_chars(struct tty_struct *tty)
1677 {
1678 struct specialix_port *port = tty->driver_data;
1679 unsigned long flags;
1680 struct specialix_board *bp = port_Board(port);
1681
1682 func_enter();
1683
1684 if (sx_paranoia_check(port, tty->name, "sx_flush_chars")) {
1685 func_exit();
1686 return;
1687 }
1688 if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
1689 !port->xmit_buf) {
1690 func_exit();
1691 return;
1692 }
1693 spin_lock_irqsave(&bp->lock, flags);
1694 port->IER |= IER_TXRDY;
1695 sx_out(port_Board(port), CD186x_CAR, port_No(port));
1696 sx_out(port_Board(port), CD186x_IER, port->IER);
1697 spin_unlock_irqrestore(&bp->lock, flags);
1698
1699 func_exit();
1700 }
1701
1702
1703 static int sx_write_room(struct tty_struct *tty)
1704 {
1705 struct specialix_port *port = tty->driver_data;
1706 int ret;
1707
1708 func_enter();
1709
1710 if (sx_paranoia_check(port, tty->name, "sx_write_room")) {
1711 func_exit();
1712 return 0;
1713 }
1714
1715 ret = SERIAL_XMIT_SIZE - port->xmit_cnt - 1;
1716 if (ret < 0)
1717 ret = 0;
1718
1719 func_exit();
1720 return ret;
1721 }
1722
1723
1724 static int sx_chars_in_buffer(struct tty_struct *tty)
1725 {
1726 struct specialix_port *port = tty->driver_data;
1727
1728 func_enter();
1729
1730 if (sx_paranoia_check(port, tty->name, "sx_chars_in_buffer")) {
1731 func_exit();
1732 return 0;
1733 }
1734 func_exit();
1735 return port->xmit_cnt;
1736 }
1737
1738 static int sx_tiocmget(struct tty_struct *tty, struct file *file)
1739 {
1740 struct specialix_port *port = tty->driver_data;
1741 struct specialix_board *bp;
1742 unsigned char status;
1743 unsigned int result;
1744 unsigned long flags;
1745
1746 func_enter();
1747
1748 if (sx_paranoia_check(port, tty->name, __func__)) {
1749 func_exit();
1750 return -ENODEV;
1751 }
1752
1753 bp = port_Board(port);
1754 spin_lock_irqsave(&bp->lock, flags);
1755 sx_out(bp, CD186x_CAR, port_No(port));
1756 status = sx_in(bp, CD186x_MSVR);
1757 spin_unlock_irqrestore(&bp->lock, flags);
1758 dprintk(SX_DEBUG_INIT, "Got msvr[%d] = %02x, car = %d.\n",
1759 port_No(port), status, sx_in(bp, CD186x_CAR));
1760 dprintk(SX_DEBUG_INIT, "sx_port = %p, port = %p\n", sx_port, port);
1761 if (sx_crtscts(port->port.tty)) {
1762 result = TIOCM_DTR | TIOCM_DSR
1763 | ((status & MSVR_DTR) ? TIOCM_RTS : 0)
1764 | ((status & MSVR_CD) ? TIOCM_CAR : 0)
1765 | ((status & MSVR_CTS) ? TIOCM_CTS : 0);
1766 } else {
1767 result = TIOCM_RTS | TIOCM_DSR
1768 | ((status & MSVR_DTR) ? TIOCM_DTR : 0)
1769 | ((status & MSVR_CD) ? TIOCM_CAR : 0)
1770 | ((status & MSVR_CTS) ? TIOCM_CTS : 0);
1771 }
1772
1773 func_exit();
1774
1775 return result;
1776 }
1777
1778
1779 static int sx_tiocmset(struct tty_struct *tty, struct file *file,
1780 unsigned int set, unsigned int clear)
1781 {
1782 struct specialix_port *port = tty->driver_data;
1783 unsigned long flags;
1784 struct specialix_board *bp;
1785
1786 func_enter();
1787
1788 if (sx_paranoia_check(port, tty->name, __func__)) {
1789 func_exit();
1790 return -ENODEV;
1791 }
1792
1793 bp = port_Board(port);
1794
1795 spin_lock_irqsave(&port->lock, flags);
1796 if (sx_crtscts(port->port.tty)) {
1797 if (set & TIOCM_RTS)
1798 port->MSVR |= MSVR_DTR;
1799 } else {
1800 if (set & TIOCM_DTR)
1801 port->MSVR |= MSVR_DTR;
1802 }
1803 if (sx_crtscts(port->port.tty)) {
1804 if (clear & TIOCM_RTS)
1805 port->MSVR &= ~MSVR_DTR;
1806 } else {
1807 if (clear & TIOCM_DTR)
1808 port->MSVR &= ~MSVR_DTR;
1809 }
1810 spin_lock(&bp->lock);
1811 sx_out(bp, CD186x_CAR, port_No(port));
1812 sx_out(bp, CD186x_MSVR, port->MSVR);
1813 spin_unlock(&bp->lock);
1814 spin_unlock_irqrestore(&port->lock, flags);
1815 func_exit();
1816 return 0;
1817 }
1818
1819
1820 static int sx_send_break(struct tty_struct *tty, int length)
1821 {
1822 struct specialix_port *port = tty->driver_data;
1823 struct specialix_board *bp = port_Board(port);
1824 unsigned long flags;
1825
1826 func_enter();
1827 if (length == 0 || length == -1)
1828 return -EOPNOTSUPP;
1829
1830 spin_lock_irqsave(&port->lock, flags);
1831 port->break_length = SPECIALIX_TPS / HZ * length;
1832 port->COR2 |= COR2_ETC;
1833 port->IER |= IER_TXRDY;
1834 spin_lock(&bp->lock);
1835 sx_out(bp, CD186x_CAR, port_No(port));
1836 sx_out(bp, CD186x_COR2, port->COR2);
1837 sx_out(bp, CD186x_IER, port->IER);
1838 spin_unlock(&bp->lock);
1839 spin_unlock_irqrestore(&port->lock, flags);
1840 sx_wait_CCR(bp);
1841 spin_lock_irqsave(&bp->lock, flags);
1842 sx_out(bp, CD186x_CCR, CCR_CORCHG2);
1843 spin_unlock_irqrestore(&bp->lock, flags);
1844 sx_wait_CCR(bp);
1845
1846 func_exit();
1847 return 0;
1848 }
1849
1850
1851 static int sx_set_serial_info(struct specialix_port *port,
1852 struct serial_struct __user *newinfo)
1853 {
1854 struct serial_struct tmp;
1855 struct specialix_board *bp = port_Board(port);
1856 int change_speed;
1857
1858 func_enter();
1859
1860 if (copy_from_user(&tmp, newinfo, sizeof(tmp))) {
1861 func_enter();
1862 return -EFAULT;
1863 }
1864
1865 lock_kernel();
1866
1867 change_speed = ((port->port.flags & ASYNC_SPD_MASK) !=
1868 (tmp.flags & ASYNC_SPD_MASK));
1869 change_speed |= (tmp.custom_divisor != port->custom_divisor);
1870
1871 if (!capable(CAP_SYS_ADMIN)) {
1872 if ((tmp.close_delay != port->port.close_delay) ||
1873 (tmp.closing_wait != port->port.closing_wait) ||
1874 ((tmp.flags & ~ASYNC_USR_MASK) !=
1875 (port->port.flags & ~ASYNC_USR_MASK))) {
1876 func_exit();
1877 unlock_kernel();
1878 return -EPERM;
1879 }
1880 port->port.flags = ((port->port.flags & ~ASYNC_USR_MASK) |
1881 (tmp.flags & ASYNC_USR_MASK));
1882 port->custom_divisor = tmp.custom_divisor;
1883 } else {
1884 port->port.flags = ((port->port.flags & ~ASYNC_FLAGS) |
1885 (tmp.flags & ASYNC_FLAGS));
1886 port->port.close_delay = tmp.close_delay;
1887 port->port.closing_wait = tmp.closing_wait;
1888 port->custom_divisor = tmp.custom_divisor;
1889 }
1890 if (change_speed)
1891 sx_change_speed(bp, port);
1892
1893 func_exit();
1894 unlock_kernel();
1895 return 0;
1896 }
1897
1898
1899 static int sx_get_serial_info(struct specialix_port *port,
1900 struct serial_struct __user *retinfo)
1901 {
1902 struct serial_struct tmp;
1903 struct specialix_board *bp = port_Board(port);
1904
1905 func_enter();
1906
1907 memset(&tmp, 0, sizeof(tmp));
1908 lock_kernel();
1909 tmp.type = PORT_CIRRUS;
1910 tmp.line = port - sx_port;
1911 tmp.port = bp->base;
1912 tmp.irq = bp->irq;
1913 tmp.flags = port->port.flags;
1914 tmp.baud_base = (SX_OSCFREQ + CD186x_TPC/2) / CD186x_TPC;
1915 tmp.close_delay = port->port.close_delay * HZ/100;
1916 tmp.closing_wait = port->port.closing_wait * HZ/100;
1917 tmp.custom_divisor = port->custom_divisor;
1918 tmp.xmit_fifo_size = CD186x_NFIFO;
1919 unlock_kernel();
1920 if (copy_to_user(retinfo, &tmp, sizeof(tmp))) {
1921 func_exit();
1922 return -EFAULT;
1923 }
1924
1925 func_exit();
1926 return 0;
1927 }
1928
1929
1930 static int sx_ioctl(struct tty_struct *tty, struct file *filp,
1931 unsigned int cmd, unsigned long arg)
1932 {
1933 struct specialix_port *port = tty->driver_data;
1934 void __user *argp = (void __user *)arg;
1935
1936 func_enter();
1937
1938 if (sx_paranoia_check(port, tty->name, "sx_ioctl")) {
1939 func_exit();
1940 return -ENODEV;
1941 }
1942
1943 switch (cmd) {
1944 case TIOCGSERIAL:
1945 func_exit();
1946 return sx_get_serial_info(port, argp);
1947 case TIOCSSERIAL:
1948 func_exit();
1949 return sx_set_serial_info(port, argp);
1950 default:
1951 func_exit();
1952 return -ENOIOCTLCMD;
1953 }
1954 func_exit();
1955 return 0;
1956 }
1957
1958
1959 static void sx_throttle(struct tty_struct *tty)
1960 {
1961 struct specialix_port *port = tty->driver_data;
1962 struct specialix_board *bp;
1963 unsigned long flags;
1964
1965 func_enter();
1966
1967 if (sx_paranoia_check(port, tty->name, "sx_throttle")) {
1968 func_exit();
1969 return;
1970 }
1971
1972 bp = port_Board(port);
1973
1974 /* Use DTR instead of RTS ! */
1975 if (sx_crtscts(tty))
1976 port->MSVR &= ~MSVR_DTR;
1977 else {
1978 /* Auch!!! I think the system shouldn't call this then. */
1979 /* Or maybe we're supposed (allowed?) to do our side of hw
1980 handshake anyway, even when hardware handshake is off.
1981 When you see this in your logs, please report.... */
1982 printk(KERN_ERR
1983 "sx%d: Need to throttle, but can't (hardware hs is off)\n",
1984 port_No(port));
1985 }
1986 spin_lock_irqsave(&bp->lock, flags);
1987 sx_out(bp, CD186x_CAR, port_No(port));
1988 spin_unlock_irqrestore(&bp->lock, flags);
1989 if (I_IXOFF(tty)) {
1990 sx_wait_CCR(bp);
1991 spin_lock_irqsave(&bp->lock, flags);
1992 sx_out(bp, CD186x_CCR, CCR_SSCH2);
1993 spin_unlock_irqrestore(&bp->lock, flags);
1994 sx_wait_CCR(bp);
1995 }
1996 spin_lock_irqsave(&bp->lock, flags);
1997 sx_out(bp, CD186x_MSVR, port->MSVR);
1998 spin_unlock_irqrestore(&bp->lock, flags);
1999
2000 func_exit();
2001 }
2002
2003
2004 static void sx_unthrottle(struct tty_struct *tty)
2005 {
2006 struct specialix_port *port = tty->driver_data;
2007 struct specialix_board *bp;
2008 unsigned long flags;
2009
2010 func_enter();
2011
2012 if (sx_paranoia_check(port, tty->name, "sx_unthrottle")) {
2013 func_exit();
2014 return;
2015 }
2016
2017 bp = port_Board(port);
2018
2019 spin_lock_irqsave(&port->lock, flags);
2020 /* XXXX Use DTR INSTEAD???? */
2021 if (sx_crtscts(tty))
2022 port->MSVR |= MSVR_DTR;
2023 /* Else clause: see remark in "sx_throttle"... */
2024 spin_lock(&bp->lock);
2025 sx_out(bp, CD186x_CAR, port_No(port));
2026 spin_unlock(&bp->lock);
2027 if (I_IXOFF(tty)) {
2028 spin_unlock_irqrestore(&port->lock, flags);
2029 sx_wait_CCR(bp);
2030 spin_lock_irqsave(&bp->lock, flags);
2031 sx_out(bp, CD186x_CCR, CCR_SSCH1);
2032 spin_unlock_irqrestore(&bp->lock, flags);
2033 sx_wait_CCR(bp);
2034 spin_lock_irqsave(&port->lock, flags);
2035 }
2036 spin_lock(&bp->lock);
2037 sx_out(bp, CD186x_MSVR, port->MSVR);
2038 spin_unlock(&bp->lock);
2039 spin_unlock_irqrestore(&port->lock, flags);
2040
2041 func_exit();
2042 }
2043
2044
2045 static void sx_stop(struct tty_struct *tty)
2046 {
2047 struct specialix_port *port = tty->driver_data;
2048 struct specialix_board *bp;
2049 unsigned long flags;
2050
2051 func_enter();
2052
2053 if (sx_paranoia_check(port, tty->name, "sx_stop")) {
2054 func_exit();
2055 return;
2056 }
2057
2058 bp = port_Board(port);
2059
2060 spin_lock_irqsave(&port->lock, flags);
2061 port->IER &= ~IER_TXRDY;
2062 spin_lock(&bp->lock);
2063 sx_out(bp, CD186x_CAR, port_No(port));
2064 sx_out(bp, CD186x_IER, port->IER);
2065 spin_unlock(&bp->lock);
2066 spin_unlock_irqrestore(&port->lock, flags);
2067
2068 func_exit();
2069 }
2070
2071
2072 static void sx_start(struct tty_struct *tty)
2073 {
2074 struct specialix_port *port = tty->driver_data;
2075 struct specialix_board *bp;
2076 unsigned long flags;
2077
2078 func_enter();
2079
2080 if (sx_paranoia_check(port, tty->name, "sx_start")) {
2081 func_exit();
2082 return;
2083 }
2084
2085 bp = port_Board(port);
2086
2087 spin_lock_irqsave(&port->lock, flags);
2088 if (port->xmit_cnt && port->xmit_buf && !(port->IER & IER_TXRDY)) {
2089 port->IER |= IER_TXRDY;
2090 spin_lock(&bp->lock);
2091 sx_out(bp, CD186x_CAR, port_No(port));
2092 sx_out(bp, CD186x_IER, port->IER);
2093 spin_unlock(&bp->lock);
2094 }
2095 spin_unlock_irqrestore(&port->lock, flags);
2096
2097 func_exit();
2098 }
2099
2100 static void sx_hangup(struct tty_struct *tty)
2101 {
2102 struct specialix_port *port = tty->driver_data;
2103 struct specialix_board *bp;
2104 unsigned long flags;
2105
2106 func_enter();
2107
2108 if (sx_paranoia_check(port, tty->name, "sx_hangup")) {
2109 func_exit();
2110 return;
2111 }
2112
2113 bp = port_Board(port);
2114
2115 sx_shutdown_port(bp, port);
2116 spin_lock_irqsave(&port->lock, flags);
2117 bp->count -= port->port.count;
2118 if (bp->count < 0) {
2119 printk(KERN_ERR
2120 "sx%d: sx_hangup: bad board count: %d port: %d\n",
2121 board_No(bp), bp->count, tty->index);
2122 bp->count = 0;
2123 }
2124 port->port.count = 0;
2125 port->port.flags &= ~ASYNC_NORMAL_ACTIVE;
2126 port->port.tty = NULL;
2127 spin_unlock_irqrestore(&port->lock, flags);
2128 wake_up_interruptible(&port->port.open_wait);
2129
2130 func_exit();
2131 }
2132
2133
2134 static void sx_set_termios(struct tty_struct *tty,
2135 struct ktermios *old_termios)
2136 {
2137 struct specialix_port *port = tty->driver_data;
2138 unsigned long flags;
2139 struct specialix_board *bp;
2140
2141 if (sx_paranoia_check(port, tty->name, "sx_set_termios"))
2142 return;
2143
2144 bp = port_Board(port);
2145 spin_lock_irqsave(&port->lock, flags);
2146 sx_change_speed(port_Board(port), port);
2147 spin_unlock_irqrestore(&port->lock, flags);
2148
2149 if ((old_termios->c_cflag & CRTSCTS) &&
2150 !(tty->termios->c_cflag & CRTSCTS)) {
2151 tty->hw_stopped = 0;
2152 sx_start(tty);
2153 }
2154 }
2155
2156 static const struct tty_operations sx_ops = {
2157 .open = sx_open,
2158 .close = sx_close,
2159 .write = sx_write,
2160 .put_char = sx_put_char,
2161 .flush_chars = sx_flush_chars,
2162 .write_room = sx_write_room,
2163 .chars_in_buffer = sx_chars_in_buffer,
2164 .flush_buffer = sx_flush_buffer,
2165 .ioctl = sx_ioctl,
2166 .throttle = sx_throttle,
2167 .unthrottle = sx_unthrottle,
2168 .set_termios = sx_set_termios,
2169 .stop = sx_stop,
2170 .start = sx_start,
2171 .hangup = sx_hangup,
2172 .tiocmget = sx_tiocmget,
2173 .tiocmset = sx_tiocmset,
2174 .break_ctl = sx_send_break,
2175 };
2176
2177 static int sx_init_drivers(void)
2178 {
2179 int error;
2180 int i;
2181
2182 func_enter();
2183
2184 specialix_driver = alloc_tty_driver(SX_NBOARD * SX_NPORT);
2185 if (!specialix_driver) {
2186 printk(KERN_ERR "sx: Couldn't allocate tty_driver.\n");
2187 func_exit();
2188 return 1;
2189 }
2190
2191 specialix_driver->owner = THIS_MODULE;
2192 specialix_driver->name = "ttyW";
2193 specialix_driver->major = SPECIALIX_NORMAL_MAJOR;
2194 specialix_driver->type = TTY_DRIVER_TYPE_SERIAL;
2195 specialix_driver->subtype = SERIAL_TYPE_NORMAL;
2196 specialix_driver->init_termios = tty_std_termios;
2197 specialix_driver->init_termios.c_cflag =
2198 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
2199 specialix_driver->init_termios.c_ispeed = 9600;
2200 specialix_driver->init_termios.c_ospeed = 9600;
2201 specialix_driver->flags = TTY_DRIVER_REAL_RAW |
2202 TTY_DRIVER_HARDWARE_BREAK;
2203 tty_set_operations(specialix_driver, &sx_ops);
2204
2205 error = tty_register_driver(specialix_driver);
2206 if (error) {
2207 put_tty_driver(specialix_driver);
2208 printk(KERN_ERR
2209 "sx: Couldn't register specialix IO8+ driver, error = %d\n",
2210 error);
2211 func_exit();
2212 return 1;
2213 }
2214 memset(sx_port, 0, sizeof(sx_port));
2215 for (i = 0; i < SX_NPORT * SX_NBOARD; i++) {
2216 sx_port[i].magic = SPECIALIX_MAGIC;
2217 tty_port_init(&sx_port[i].port);
2218 spin_lock_init(&sx_port[i].lock);
2219 }
2220
2221 func_exit();
2222 return 0;
2223 }
2224
2225 static void sx_release_drivers(void)
2226 {
2227 func_enter();
2228
2229 tty_unregister_driver(specialix_driver);
2230 put_tty_driver(specialix_driver);
2231 func_exit();
2232 }
2233
2234 /*
2235 * This routine must be called by kernel at boot time
2236 */
2237 static int __init specialix_init(void)
2238 {
2239 int i;
2240 int found = 0;
2241
2242 func_enter();
2243
2244 printk(KERN_INFO "sx: Specialix IO8+ driver v" VERSION ", (c) R.E.Wolff 1997/1998.\n");
2245 printk(KERN_INFO "sx: derived from work (c) D.Gorodchanin 1994-1996.\n");
2246 if (sx_rtscts)
2247 printk(KERN_INFO
2248 "sx: DTR/RTS pin is RTS when CRTSCTS is on.\n");
2249 else
2250 printk(KERN_INFO "sx: DTR/RTS pin is always RTS.\n");
2251
2252 for (i = 0; i < SX_NBOARD; i++)
2253 spin_lock_init(&sx_board[i].lock);
2254
2255 if (sx_init_drivers()) {
2256 func_exit();
2257 return -EIO;
2258 }
2259
2260 for (i = 0; i < SX_NBOARD; i++)
2261 if (sx_board[i].base && !sx_probe(&sx_board[i]))
2262 found++;
2263
2264 #ifdef CONFIG_PCI
2265 {
2266 struct pci_dev *pdev = NULL;
2267
2268 i = 0;
2269 while (i < SX_NBOARD) {
2270 if (sx_board[i].flags & SX_BOARD_PRESENT) {
2271 i++;
2272 continue;
2273 }
2274 pdev = pci_get_device(PCI_VENDOR_ID_SPECIALIX,
2275 PCI_DEVICE_ID_SPECIALIX_IO8, pdev);
2276 if (!pdev)
2277 break;
2278
2279 if (pci_enable_device(pdev))
2280 continue;
2281
2282 sx_board[i].irq = pdev->irq;
2283
2284 sx_board[i].base = pci_resource_start(pdev, 2);
2285
2286 sx_board[i].flags |= SX_BOARD_IS_PCI;
2287 if (!sx_probe(&sx_board[i]))
2288 found++;
2289 }
2290 /* May exit pci_get sequence early with lots of boards */
2291 if (pdev != NULL)
2292 pci_dev_put(pdev);
2293 }
2294 #endif
2295
2296 if (!found) {
2297 sx_release_drivers();
2298 printk(KERN_INFO "sx: No specialix IO8+ boards detected.\n");
2299 func_exit();
2300 return -EIO;
2301 }
2302
2303 func_exit();
2304 return 0;
2305 }
2306
2307 static int iobase[SX_NBOARD] = {0,};
2308 static int irq[SX_NBOARD] = {0,};
2309
2310 module_param_array(iobase, int, NULL, 0);
2311 module_param_array(irq, int, NULL, 0);
2312 module_param(sx_debug, int, 0);
2313 module_param(sx_rtscts, int, 0);
2314 module_param(sx_rxfifo, int, 0);
2315
2316 /*
2317 * You can setup up to 4 boards.
2318 * by specifying "iobase=0xXXX,0xXXX ..." as insmod parameter.
2319 * You should specify the IRQs too in that case "irq=....,...".
2320 *
2321 * More than 4 boards in one computer is not possible, as the card can
2322 * only use 4 different interrupts.
2323 *
2324 */
2325 static int __init specialix_init_module(void)
2326 {
2327 int i;
2328
2329 func_enter();
2330
2331 if (iobase[0] || iobase[1] || iobase[2] || iobase[3]) {
2332 for (i = 0; i < SX_NBOARD; i++) {
2333 sx_board[i].base = iobase[i];
2334 sx_board[i].irq = irq[i];
2335 sx_board[i].count = 0;
2336 }
2337 }
2338
2339 func_exit();
2340
2341 return specialix_init();
2342 }
2343
2344 static void __exit specialix_exit_module(void)
2345 {
2346 int i;
2347
2348 func_enter();
2349
2350 sx_release_drivers();
2351 for (i = 0; i < SX_NBOARD; i++)
2352 if (sx_board[i].flags & SX_BOARD_PRESENT)
2353 sx_release_io_range(&sx_board[i]);
2354 func_exit();
2355 }
2356
2357 static struct pci_device_id specialx_pci_tbl[] __devinitdata = {
2358 { PCI_DEVICE(PCI_VENDOR_ID_SPECIALIX, PCI_DEVICE_ID_SPECIALIX_IO8) },
2359 { }
2360 };
2361 MODULE_DEVICE_TABLE(pci, specialx_pci_tbl);
2362
2363 module_init(specialix_init_module);
2364 module_exit(specialix_exit_module);
2365
2366 MODULE_LICENSE("GPL");
2367 MODULE_ALIAS_CHARDEV_MAJOR(SPECIALIX_NORMAL_MAJOR);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree