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Docbook: add fs/eventfd.c and fix typos in it
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / char / specialix.c
blobc2bca3f25ef3f96f13c036ab2ae8c2a4976c7b27
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/fcntl.h>
91 #include <linux/major.h>
92 #include <linux/delay.h>
93 #include <linux/pci.h>
94 #include <linux/init.h>
95 #include <linux/uaccess.h>
96 #include <linux/gfp.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 tty_unlock();
1368 schedule();
1369 tty_lock();
1370 }
1371
1372 set_current_state(TASK_RUNNING);
1373 remove_wait_queue(&port->port.open_wait, &wait);
1374 spin_lock_irqsave(&port->lock, flags);
1375 if (!tty_hung_up_p(filp))
1376 port->port.count++;
1377 port->port.blocked_open--;
1378 spin_unlock_irqrestore(&port->lock, flags);
1379 if (retval) {
1380 func_exit();
1381 return retval;
1382 }
1383
1384 port->port.flags |= ASYNC_NORMAL_ACTIVE;
1385 func_exit();
1386 return 0;
1387 }
1388
1389
1390 static int sx_open(struct tty_struct *tty, struct file *filp)
1391 {
1392 int board;
1393 int error;
1394 struct specialix_port *port;
1395 struct specialix_board *bp;
1396 int i;
1397 unsigned long flags;
1398
1399 func_enter();
1400
1401 board = SX_BOARD(tty->index);
1402
1403 if (board >= SX_NBOARD || !(sx_board[board].flags & SX_BOARD_PRESENT)) {
1404 func_exit();
1405 return -ENODEV;
1406 }
1407
1408 bp = &sx_board[board];
1409 port = sx_port + board * SX_NPORT + SX_PORT(tty->index);
1410 port->overrun = 0;
1411 for (i = 0; i < 10; i++)
1412 port->hits[i] = 0;
1413
1414 dprintk(SX_DEBUG_OPEN,
1415 "Board = %d, bp = %p, port = %p, portno = %d.\n",
1416 board, bp, port, SX_PORT(tty->index));
1417
1418 if (sx_paranoia_check(port, tty->name, "sx_open")) {
1419 func_enter();
1420 return -ENODEV;
1421 }
1422
1423 error = sx_setup_board(bp);
1424 if (error) {
1425 func_exit();
1426 return error;
1427 }
1428
1429 spin_lock_irqsave(&bp->lock, flags);
1430 port->port.count++;
1431 bp->count++;
1432 tty->driver_data = port;
1433 port->port.tty = tty;
1434 spin_unlock_irqrestore(&bp->lock, flags);
1435
1436 error = sx_setup_port(bp, port);
1437 if (error) {
1438 func_enter();
1439 return error;
1440 }
1441
1442 error = block_til_ready(tty, filp, port);
1443 if (error) {
1444 func_enter();
1445 return error;
1446 }
1447
1448 func_exit();
1449 return 0;
1450 }
1451
1452 static void sx_flush_buffer(struct tty_struct *tty)
1453 {
1454 struct specialix_port *port = tty->driver_data;
1455 unsigned long flags;
1456 struct specialix_board *bp;
1457
1458 func_enter();
1459
1460 if (sx_paranoia_check(port, tty->name, "sx_flush_buffer")) {
1461 func_exit();
1462 return;
1463 }
1464
1465 bp = port_Board(port);
1466 spin_lock_irqsave(&port->lock, flags);
1467 port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
1468 spin_unlock_irqrestore(&port->lock, flags);
1469 tty_wakeup(tty);
1470
1471 func_exit();
1472 }
1473
1474 static void sx_close(struct tty_struct *tty, struct file *filp)
1475 {
1476 struct specialix_port *port = tty->driver_data;
1477 struct specialix_board *bp;
1478 unsigned long flags;
1479 unsigned long timeout;
1480
1481 func_enter();
1482 if (!port || sx_paranoia_check(port, tty->name, "close")) {
1483 func_exit();
1484 return;
1485 }
1486 spin_lock_irqsave(&port->lock, flags);
1487
1488 if (tty_hung_up_p(filp)) {
1489 spin_unlock_irqrestore(&port->lock, flags);
1490 func_exit();
1491 return;
1492 }
1493
1494 bp = port_Board(port);
1495 if (tty->count == 1 && port->port.count != 1) {
1496 printk(KERN_ERR "sx%d: sx_close: bad port count;"
1497 " tty->count is 1, port count is %d\n",
1498 board_No(bp), port->port.count);
1499 port->port.count = 1;
1500 }
1501
1502 if (port->port.count > 1) {
1503 port->port.count--;
1504 bp->count--;
1505
1506 spin_unlock_irqrestore(&port->lock, flags);
1507
1508 func_exit();
1509 return;
1510 }
1511 port->port.flags |= ASYNC_CLOSING;
1512 /*
1513 * Now we wait for the transmit buffer to clear; and we notify
1514 * the line discipline to only process XON/XOFF characters.
1515 */
1516 tty->closing = 1;
1517 spin_unlock_irqrestore(&port->lock, flags);
1518 dprintk(SX_DEBUG_OPEN, "Closing\n");
1519 if (port->port.closing_wait != ASYNC_CLOSING_WAIT_NONE)
1520 tty_wait_until_sent(tty, port->port.closing_wait);
1521 /*
1522 * At this point we stop accepting input. To do this, we
1523 * disable the receive line status interrupts, and tell the
1524 * interrupt driver to stop checking the data ready bit in the
1525 * line status register.
1526 */
1527 dprintk(SX_DEBUG_OPEN, "Closed\n");
1528 port->IER &= ~IER_RXD;
1529 if (port->port.flags & ASYNC_INITIALIZED) {
1530 port->IER &= ~IER_TXRDY;
1531 port->IER |= IER_TXEMPTY;
1532 spin_lock_irqsave(&bp->lock, flags);
1533 sx_out(bp, CD186x_CAR, port_No(port));
1534 sx_out(bp, CD186x_IER, port->IER);
1535 spin_unlock_irqrestore(&bp->lock, flags);
1536 /*
1537 * Before we drop DTR, make sure the UART transmitter
1538 * has completely drained; this is especially
1539 * important if there is a transmit FIFO!
1540 */
1541 timeout = jiffies+HZ;
1542 while (port->IER & IER_TXEMPTY) {
1543 set_current_state(TASK_INTERRUPTIBLE);
1544 msleep_interruptible(jiffies_to_msecs(port->timeout));
1545 if (time_after(jiffies, timeout)) {
1546 printk(KERN_INFO "Timeout waiting for close\n");
1547 break;
1548 }
1549 }
1550
1551 }
1552
1553 if (--bp->count < 0) {
1554 printk(KERN_ERR
1555 "sx%d: sx_shutdown_port: bad board count: %d port: %d\n",
1556 board_No(bp), bp->count, tty->index);
1557 bp->count = 0;
1558 }
1559 if (--port->port.count < 0) {
1560 printk(KERN_ERR
1561 "sx%d: sx_close: bad port count for tty%d: %d\n",
1562 board_No(bp), port_No(port), port->port.count);
1563 port->port.count = 0;
1564 }
1565
1566 sx_shutdown_port(bp, port);
1567 sx_flush_buffer(tty);
1568 tty_ldisc_flush(tty);
1569 spin_lock_irqsave(&port->lock, flags);
1570 tty->closing = 0;
1571 port->port.tty = NULL;
1572 spin_unlock_irqrestore(&port->lock, flags);
1573 if (port->port.blocked_open) {
1574 if (port->port.close_delay)
1575 msleep_interruptible(
1576 jiffies_to_msecs(port->port.close_delay));
1577 wake_up_interruptible(&port->port.open_wait);
1578 }
1579 port->port.flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
1580 wake_up_interruptible(&port->port.close_wait);
1581
1582 func_exit();
1583 }
1584
1585
1586 static int sx_write(struct tty_struct *tty,
1587 const unsigned char *buf, int count)
1588 {
1589 struct specialix_port *port = tty->driver_data;
1590 struct specialix_board *bp;
1591 int c, total = 0;
1592 unsigned long flags;
1593
1594 func_enter();
1595 if (sx_paranoia_check(port, tty->name, "sx_write")) {
1596 func_exit();
1597 return 0;
1598 }
1599
1600 bp = port_Board(port);
1601
1602 if (!port->xmit_buf) {
1603 func_exit();
1604 return 0;
1605 }
1606
1607 while (1) {
1608 spin_lock_irqsave(&port->lock, flags);
1609 c = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt - 1,
1610 SERIAL_XMIT_SIZE - port->xmit_head));
1611 if (c <= 0) {
1612 spin_unlock_irqrestore(&port->lock, flags);
1613 break;
1614 }
1615 memcpy(port->xmit_buf + port->xmit_head, buf, c);
1616 port->xmit_head = (port->xmit_head + c) & (SERIAL_XMIT_SIZE-1);
1617 port->xmit_cnt += c;
1618 spin_unlock_irqrestore(&port->lock, flags);
1619
1620 buf += c;
1621 count -= c;
1622 total += c;
1623 }
1624
1625 spin_lock_irqsave(&bp->lock, flags);
1626 if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped &&
1627 !(port->IER & IER_TXRDY)) {
1628 port->IER |= IER_TXRDY;
1629 sx_out(bp, CD186x_CAR, port_No(port));
1630 sx_out(bp, CD186x_IER, port->IER);
1631 }
1632 spin_unlock_irqrestore(&bp->lock, flags);
1633 func_exit();
1634
1635 return total;
1636 }
1637
1638
1639 static int sx_put_char(struct tty_struct *tty, unsigned char ch)
1640 {
1641 struct specialix_port *port = tty->driver_data;
1642 unsigned long flags;
1643 struct specialix_board *bp;
1644
1645 func_enter();
1646
1647 if (sx_paranoia_check(port, tty->name, "sx_put_char")) {
1648 func_exit();
1649 return 0;
1650 }
1651 dprintk(SX_DEBUG_TX, "check tty: %p %p\n", tty, port->xmit_buf);
1652 if (!port->xmit_buf) {
1653 func_exit();
1654 return 0;
1655 }
1656 bp = port_Board(port);
1657 spin_lock_irqsave(&port->lock, flags);
1658
1659 dprintk(SX_DEBUG_TX, "xmit_cnt: %d xmit_buf: %p\n",
1660 port->xmit_cnt, port->xmit_buf);
1661 if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1 || !port->xmit_buf) {
1662 spin_unlock_irqrestore(&port->lock, flags);
1663 dprintk(SX_DEBUG_TX, "Exit size\n");
1664 func_exit();
1665 return 0;
1666 }
1667 dprintk(SX_DEBUG_TX, "Handle xmit: %p %p\n", port, port->xmit_buf);
1668 port->xmit_buf[port->xmit_head++] = ch;
1669 port->xmit_head &= SERIAL_XMIT_SIZE - 1;
1670 port->xmit_cnt++;
1671 spin_unlock_irqrestore(&port->lock, flags);
1672
1673 func_exit();
1674 return 1;
1675 }
1676
1677
1678 static void sx_flush_chars(struct tty_struct *tty)
1679 {
1680 struct specialix_port *port = tty->driver_data;
1681 unsigned long flags;
1682 struct specialix_board *bp = port_Board(port);
1683
1684 func_enter();
1685
1686 if (sx_paranoia_check(port, tty->name, "sx_flush_chars")) {
1687 func_exit();
1688 return;
1689 }
1690 if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
1691 !port->xmit_buf) {
1692 func_exit();
1693 return;
1694 }
1695 spin_lock_irqsave(&bp->lock, flags);
1696 port->IER |= IER_TXRDY;
1697 sx_out(port_Board(port), CD186x_CAR, port_No(port));
1698 sx_out(port_Board(port), CD186x_IER, port->IER);
1699 spin_unlock_irqrestore(&bp->lock, flags);
1700
1701 func_exit();
1702 }
1703
1704
1705 static int sx_write_room(struct tty_struct *tty)
1706 {
1707 struct specialix_port *port = tty->driver_data;
1708 int ret;
1709
1710 func_enter();
1711
1712 if (sx_paranoia_check(port, tty->name, "sx_write_room")) {
1713 func_exit();
1714 return 0;
1715 }
1716
1717 ret = SERIAL_XMIT_SIZE - port->xmit_cnt - 1;
1718 if (ret < 0)
1719 ret = 0;
1720
1721 func_exit();
1722 return ret;
1723 }
1724
1725
1726 static int sx_chars_in_buffer(struct tty_struct *tty)
1727 {
1728 struct specialix_port *port = tty->driver_data;
1729
1730 func_enter();
1731
1732 if (sx_paranoia_check(port, tty->name, "sx_chars_in_buffer")) {
1733 func_exit();
1734 return 0;
1735 }
1736 func_exit();
1737 return port->xmit_cnt;
1738 }
1739
1740 static int sx_tiocmget(struct tty_struct *tty, struct file *file)
1741 {
1742 struct specialix_port *port = tty->driver_data;
1743 struct specialix_board *bp;
1744 unsigned char status;
1745 unsigned int result;
1746 unsigned long flags;
1747
1748 func_enter();
1749
1750 if (sx_paranoia_check(port, tty->name, __func__)) {
1751 func_exit();
1752 return -ENODEV;
1753 }
1754
1755 bp = port_Board(port);
1756 spin_lock_irqsave(&bp->lock, flags);
1757 sx_out(bp, CD186x_CAR, port_No(port));
1758 status = sx_in(bp, CD186x_MSVR);
1759 spin_unlock_irqrestore(&bp->lock, flags);
1760 dprintk(SX_DEBUG_INIT, "Got msvr[%d] = %02x, car = %d.\n",
1761 port_No(port), status, sx_in(bp, CD186x_CAR));
1762 dprintk(SX_DEBUG_INIT, "sx_port = %p, port = %p\n", sx_port, port);
1763 if (sx_crtscts(port->port.tty)) {
1764 result = TIOCM_DTR | TIOCM_DSR
1765 | ((status & MSVR_DTR) ? TIOCM_RTS : 0)
1766 | ((status & MSVR_CD) ? TIOCM_CAR : 0)
1767 | ((status & MSVR_CTS) ? TIOCM_CTS : 0);
1768 } else {
1769 result = TIOCM_RTS | TIOCM_DSR
1770 | ((status & MSVR_DTR) ? TIOCM_DTR : 0)
1771 | ((status & MSVR_CD) ? TIOCM_CAR : 0)
1772 | ((status & MSVR_CTS) ? TIOCM_CTS : 0);
1773 }
1774
1775 func_exit();
1776
1777 return result;
1778 }
1779
1780
1781 static int sx_tiocmset(struct tty_struct *tty, struct file *file,
1782 unsigned int set, unsigned int clear)
1783 {
1784 struct specialix_port *port = tty->driver_data;
1785 unsigned long flags;
1786 struct specialix_board *bp;
1787
1788 func_enter();
1789
1790 if (sx_paranoia_check(port, tty->name, __func__)) {
1791 func_exit();
1792 return -ENODEV;
1793 }
1794
1795 bp = port_Board(port);
1796
1797 spin_lock_irqsave(&port->lock, flags);
1798 if (sx_crtscts(port->port.tty)) {
1799 if (set & TIOCM_RTS)
1800 port->MSVR |= MSVR_DTR;
1801 } else {
1802 if (set & TIOCM_DTR)
1803 port->MSVR |= MSVR_DTR;
1804 }
1805 if (sx_crtscts(port->port.tty)) {
1806 if (clear & TIOCM_RTS)
1807 port->MSVR &= ~MSVR_DTR;
1808 } else {
1809 if (clear & TIOCM_DTR)
1810 port->MSVR &= ~MSVR_DTR;
1811 }
1812 spin_lock(&bp->lock);
1813 sx_out(bp, CD186x_CAR, port_No(port));
1814 sx_out(bp, CD186x_MSVR, port->MSVR);
1815 spin_unlock(&bp->lock);
1816 spin_unlock_irqrestore(&port->lock, flags);
1817 func_exit();
1818 return 0;
1819 }
1820
1821
1822 static int sx_send_break(struct tty_struct *tty, int length)
1823 {
1824 struct specialix_port *port = tty->driver_data;
1825 struct specialix_board *bp = port_Board(port);
1826 unsigned long flags;
1827
1828 func_enter();
1829 if (length == 0 || length == -1)
1830 return -EOPNOTSUPP;
1831
1832 spin_lock_irqsave(&port->lock, flags);
1833 port->break_length = SPECIALIX_TPS / HZ * length;
1834 port->COR2 |= COR2_ETC;
1835 port->IER |= IER_TXRDY;
1836 spin_lock(&bp->lock);
1837 sx_out(bp, CD186x_CAR, port_No(port));
1838 sx_out(bp, CD186x_COR2, port->COR2);
1839 sx_out(bp, CD186x_IER, port->IER);
1840 spin_unlock(&bp->lock);
1841 spin_unlock_irqrestore(&port->lock, flags);
1842 sx_wait_CCR(bp);
1843 spin_lock_irqsave(&bp->lock, flags);
1844 sx_out(bp, CD186x_CCR, CCR_CORCHG2);
1845 spin_unlock_irqrestore(&bp->lock, flags);
1846 sx_wait_CCR(bp);
1847
1848 func_exit();
1849 return 0;
1850 }
1851
1852
1853 static int sx_set_serial_info(struct specialix_port *port,
1854 struct serial_struct __user *newinfo)
1855 {
1856 struct serial_struct tmp;
1857 struct specialix_board *bp = port_Board(port);
1858 int change_speed;
1859
1860 func_enter();
1861
1862 if (copy_from_user(&tmp, newinfo, sizeof(tmp))) {
1863 func_enter();
1864 return -EFAULT;
1865 }
1866
1867 mutex_lock(&port->port.mutex);
1868 change_speed = ((port->port.flags & ASYNC_SPD_MASK) !=
1869 (tmp.flags & ASYNC_SPD_MASK));
1870 change_speed |= (tmp.custom_divisor != port->custom_divisor);
1871
1872 if (!capable(CAP_SYS_ADMIN)) {
1873 if ((tmp.close_delay != port->port.close_delay) ||
1874 (tmp.closing_wait != port->port.closing_wait) ||
1875 ((tmp.flags & ~ASYNC_USR_MASK) !=
1876 (port->port.flags & ~ASYNC_USR_MASK))) {
1877 func_exit();
1878 mutex_unlock(&port->port.mutex);
1879 return -EPERM;
1880 }
1881 port->port.flags = ((port->port.flags & ~ASYNC_USR_MASK) |
1882 (tmp.flags & ASYNC_USR_MASK));
1883 port->custom_divisor = tmp.custom_divisor;
1884 } else {
1885 port->port.flags = ((port->port.flags & ~ASYNC_FLAGS) |
1886 (tmp.flags & ASYNC_FLAGS));
1887 port->port.close_delay = tmp.close_delay;
1888 port->port.closing_wait = tmp.closing_wait;
1889 port->custom_divisor = tmp.custom_divisor;
1890 }
1891 if (change_speed)
1892 sx_change_speed(bp, port);
1893
1894 func_exit();
1895 mutex_unlock(&port->port.mutex);
1896 return 0;
1897 }
1898
1899
1900 static int sx_get_serial_info(struct specialix_port *port,
1901 struct serial_struct __user *retinfo)
1902 {
1903 struct serial_struct tmp;
1904 struct specialix_board *bp = port_Board(port);
1905
1906 func_enter();
1907
1908 memset(&tmp, 0, sizeof(tmp));
1909 mutex_lock(&port->port.mutex);
1910 tmp.type = PORT_CIRRUS;
1911 tmp.line = port - sx_port;
1912 tmp.port = bp->base;
1913 tmp.irq = bp->irq;
1914 tmp.flags = port->port.flags;
1915 tmp.baud_base = (SX_OSCFREQ + CD186x_TPC/2) / CD186x_TPC;
1916 tmp.close_delay = port->port.close_delay * HZ/100;
1917 tmp.closing_wait = port->port.closing_wait * HZ/100;
1918 tmp.custom_divisor = port->custom_divisor;
1919 tmp.xmit_fifo_size = CD186x_NFIFO;
1920 mutex_unlock(&port->port.mutex);
1921 if (copy_to_user(retinfo, &tmp, sizeof(tmp))) {
1922 func_exit();
1923 return -EFAULT;
1924 }
1925
1926 func_exit();
1927 return 0;
1928 }
1929
1930
1931 static int sx_ioctl(struct tty_struct *tty, struct file *filp,
1932 unsigned int cmd, unsigned long arg)
1933 {
1934 struct specialix_port *port = tty->driver_data;
1935 void __user *argp = (void __user *)arg;
1936
1937 func_enter();
1938
1939 if (sx_paranoia_check(port, tty->name, "sx_ioctl")) {
1940 func_exit();
1941 return -ENODEV;
1942 }
1943
1944 switch (cmd) {
1945 case TIOCGSERIAL:
1946 func_exit();
1947 return sx_get_serial_info(port, argp);
1948 case TIOCSSERIAL:
1949 func_exit();
1950 return sx_set_serial_info(port, argp);
1951 default:
1952 func_exit();
1953 return -ENOIOCTLCMD;
1954 }
1955 func_exit();
1956 return 0;
1957 }
1958
1959
1960 static void sx_throttle(struct tty_struct *tty)
1961 {
1962 struct specialix_port *port = tty->driver_data;
1963 struct specialix_board *bp;
1964 unsigned long flags;
1965
1966 func_enter();
1967
1968 if (sx_paranoia_check(port, tty->name, "sx_throttle")) {
1969 func_exit();
1970 return;
1971 }
1972
1973 bp = port_Board(port);
1974
1975 /* Use DTR instead of RTS ! */
1976 if (sx_crtscts(tty))
1977 port->MSVR &= ~MSVR_DTR;
1978 else {
1979 /* Auch!!! I think the system shouldn't call this then. */
1980 /* Or maybe we're supposed (allowed?) to do our side of hw
1981 handshake anyway, even when hardware handshake is off.
1982 When you see this in your logs, please report.... */
1983 printk(KERN_ERR
1984 "sx%d: Need to throttle, but can't (hardware hs is off)\n",
1985 port_No(port));
1986 }
1987 spin_lock_irqsave(&bp->lock, flags);
1988 sx_out(bp, CD186x_CAR, port_No(port));
1989 spin_unlock_irqrestore(&bp->lock, flags);
1990 if (I_IXOFF(tty)) {
1991 sx_wait_CCR(bp);
1992 spin_lock_irqsave(&bp->lock, flags);
1993 sx_out(bp, CD186x_CCR, CCR_SSCH2);
1994 spin_unlock_irqrestore(&bp->lock, flags);
1995 sx_wait_CCR(bp);
1996 }
1997 spin_lock_irqsave(&bp->lock, flags);
1998 sx_out(bp, CD186x_MSVR, port->MSVR);
1999 spin_unlock_irqrestore(&bp->lock, flags);
2000
2001 func_exit();
2002 }
2003
2004
2005 static void sx_unthrottle(struct tty_struct *tty)
2006 {
2007 struct specialix_port *port = tty->driver_data;
2008 struct specialix_board *bp;
2009 unsigned long flags;
2010
2011 func_enter();
2012
2013 if (sx_paranoia_check(port, tty->name, "sx_unthrottle")) {
2014 func_exit();
2015 return;
2016 }
2017
2018 bp = port_Board(port);
2019
2020 spin_lock_irqsave(&port->lock, flags);
2021 /* XXXX Use DTR INSTEAD???? */
2022 if (sx_crtscts(tty))
2023 port->MSVR |= MSVR_DTR;
2024 /* Else clause: see remark in "sx_throttle"... */
2025 spin_lock(&bp->lock);
2026 sx_out(bp, CD186x_CAR, port_No(port));
2027 spin_unlock(&bp->lock);
2028 if (I_IXOFF(tty)) {
2029 spin_unlock_irqrestore(&port->lock, flags);
2030 sx_wait_CCR(bp);
2031 spin_lock_irqsave(&bp->lock, flags);
2032 sx_out(bp, CD186x_CCR, CCR_SSCH1);
2033 spin_unlock_irqrestore(&bp->lock, flags);
2034 sx_wait_CCR(bp);
2035 spin_lock_irqsave(&port->lock, flags);
2036 }
2037 spin_lock(&bp->lock);
2038 sx_out(bp, CD186x_MSVR, port->MSVR);
2039 spin_unlock(&bp->lock);
2040 spin_unlock_irqrestore(&port->lock, flags);
2041
2042 func_exit();
2043 }
2044
2045
2046 static void sx_stop(struct tty_struct *tty)
2047 {
2048 struct specialix_port *port = tty->driver_data;
2049 struct specialix_board *bp;
2050 unsigned long flags;
2051
2052 func_enter();
2053
2054 if (sx_paranoia_check(port, tty->name, "sx_stop")) {
2055 func_exit();
2056 return;
2057 }
2058
2059 bp = port_Board(port);
2060
2061 spin_lock_irqsave(&port->lock, flags);
2062 port->IER &= ~IER_TXRDY;
2063 spin_lock(&bp->lock);
2064 sx_out(bp, CD186x_CAR, port_No(port));
2065 sx_out(bp, CD186x_IER, port->IER);
2066 spin_unlock(&bp->lock);
2067 spin_unlock_irqrestore(&port->lock, flags);
2068
2069 func_exit();
2070 }
2071
2072
2073 static void sx_start(struct tty_struct *tty)
2074 {
2075 struct specialix_port *port = tty->driver_data;
2076 struct specialix_board *bp;
2077 unsigned long flags;
2078
2079 func_enter();
2080
2081 if (sx_paranoia_check(port, tty->name, "sx_start")) {
2082 func_exit();
2083 return;
2084 }
2085
2086 bp = port_Board(port);
2087
2088 spin_lock_irqsave(&port->lock, flags);
2089 if (port->xmit_cnt && port->xmit_buf && !(port->IER & IER_TXRDY)) {
2090 port->IER |= IER_TXRDY;
2091 spin_lock(&bp->lock);
2092 sx_out(bp, CD186x_CAR, port_No(port));
2093 sx_out(bp, CD186x_IER, port->IER);
2094 spin_unlock(&bp->lock);
2095 }
2096 spin_unlock_irqrestore(&port->lock, flags);
2097
2098 func_exit();
2099 }
2100
2101 static void sx_hangup(struct tty_struct *tty)
2102 {
2103 struct specialix_port *port = tty->driver_data;
2104 struct specialix_board *bp;
2105 unsigned long flags;
2106
2107 func_enter();
2108
2109 if (sx_paranoia_check(port, tty->name, "sx_hangup")) {
2110 func_exit();
2111 return;
2112 }
2113
2114 bp = port_Board(port);
2115
2116 sx_shutdown_port(bp, port);
2117 spin_lock_irqsave(&port->lock, flags);
2118 bp->count -= port->port.count;
2119 if (bp->count < 0) {
2120 printk(KERN_ERR
2121 "sx%d: sx_hangup: bad board count: %d port: %d\n",
2122 board_No(bp), bp->count, tty->index);
2123 bp->count = 0;
2124 }
2125 port->port.count = 0;
2126 port->port.flags &= ~ASYNC_NORMAL_ACTIVE;
2127 port->port.tty = NULL;
2128 spin_unlock_irqrestore(&port->lock, flags);
2129 wake_up_interruptible(&port->port.open_wait);
2130
2131 func_exit();
2132 }
2133
2134
2135 static void sx_set_termios(struct tty_struct *tty,
2136 struct ktermios *old_termios)
2137 {
2138 struct specialix_port *port = tty->driver_data;
2139 unsigned long flags;
2140 struct specialix_board *bp;
2141
2142 if (sx_paranoia_check(port, tty->name, "sx_set_termios"))
2143 return;
2144
2145 bp = port_Board(port);
2146 spin_lock_irqsave(&port->lock, flags);
2147 sx_change_speed(port_Board(port), port);
2148 spin_unlock_irqrestore(&port->lock, flags);
2149
2150 if ((old_termios->c_cflag & CRTSCTS) &&
2151 !(tty->termios->c_cflag & CRTSCTS)) {
2152 tty->hw_stopped = 0;
2153 sx_start(tty);
2154 }
2155 }
2156
2157 static const struct tty_operations sx_ops = {
2158 .open = sx_open,
2159 .close = sx_close,
2160 .write = sx_write,
2161 .put_char = sx_put_char,
2162 .flush_chars = sx_flush_chars,
2163 .write_room = sx_write_room,
2164 .chars_in_buffer = sx_chars_in_buffer,
2165 .flush_buffer = sx_flush_buffer,
2166 .ioctl = sx_ioctl,
2167 .throttle = sx_throttle,
2168 .unthrottle = sx_unthrottle,
2169 .set_termios = sx_set_termios,
2170 .stop = sx_stop,
2171 .start = sx_start,
2172 .hangup = sx_hangup,
2173 .tiocmget = sx_tiocmget,
2174 .tiocmset = sx_tiocmset,
2175 .break_ctl = sx_send_break,
2176 };
2177
2178 static int sx_init_drivers(void)
2179 {
2180 int error;
2181 int i;
2182
2183 func_enter();
2184
2185 specialix_driver = alloc_tty_driver(SX_NBOARD * SX_NPORT);
2186 if (!specialix_driver) {
2187 printk(KERN_ERR "sx: Couldn't allocate tty_driver.\n");
2188 func_exit();
2189 return 1;
2190 }
2191
2192 specialix_driver->owner = THIS_MODULE;
2193 specialix_driver->name = "ttyW";
2194 specialix_driver->major = SPECIALIX_NORMAL_MAJOR;
2195 specialix_driver->type = TTY_DRIVER_TYPE_SERIAL;
2196 specialix_driver->subtype = SERIAL_TYPE_NORMAL;
2197 specialix_driver->init_termios = tty_std_termios;
2198 specialix_driver->init_termios.c_cflag =
2199 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
2200 specialix_driver->init_termios.c_ispeed = 9600;
2201 specialix_driver->init_termios.c_ospeed = 9600;
2202 specialix_driver->flags = TTY_DRIVER_REAL_RAW |
2203 TTY_DRIVER_HARDWARE_BREAK;
2204 tty_set_operations(specialix_driver, &sx_ops);
2205
2206 error = tty_register_driver(specialix_driver);
2207 if (error) {
2208 put_tty_driver(specialix_driver);
2209 printk(KERN_ERR
2210 "sx: Couldn't register specialix IO8+ driver, error = %d\n",
2211 error);
2212 func_exit();
2213 return 1;
2214 }
2215 memset(sx_port, 0, sizeof(sx_port));
2216 for (i = 0; i < SX_NPORT * SX_NBOARD; i++) {
2217 sx_port[i].magic = SPECIALIX_MAGIC;
2218 tty_port_init(&sx_port[i].port);
2219 spin_lock_init(&sx_port[i].lock);
2220 }
2221
2222 func_exit();
2223 return 0;
2224 }
2225
2226 static void sx_release_drivers(void)
2227 {
2228 func_enter();
2229
2230 tty_unregister_driver(specialix_driver);
2231 put_tty_driver(specialix_driver);
2232 func_exit();
2233 }
2234
2235 /*
2236 * This routine must be called by kernel at boot time
2237 */
2238 static int __init specialix_init(void)
2239 {
2240 int i;
2241 int found = 0;
2242
2243 func_enter();
2244
2245 printk(KERN_INFO "sx: Specialix IO8+ driver v" VERSION ", (c) R.E.Wolff 1997/1998.\n");
2246 printk(KERN_INFO "sx: derived from work (c) D.Gorodchanin 1994-1996.\n");
2247 if (sx_rtscts)
2248 printk(KERN_INFO
2249 "sx: DTR/RTS pin is RTS when CRTSCTS is on.\n");
2250 else
2251 printk(KERN_INFO "sx: DTR/RTS pin is always RTS.\n");
2252
2253 for (i = 0; i < SX_NBOARD; i++)
2254 spin_lock_init(&sx_board[i].lock);
2255
2256 if (sx_init_drivers()) {
2257 func_exit();
2258 return -EIO;
2259 }
2260
2261 for (i = 0; i < SX_NBOARD; i++)
2262 if (sx_board[i].base && !sx_probe(&sx_board[i]))
2263 found++;
2264
2265 #ifdef CONFIG_PCI
2266 {
2267 struct pci_dev *pdev = NULL;
2268
2269 i = 0;
2270 while (i < SX_NBOARD) {
2271 if (sx_board[i].flags & SX_BOARD_PRESENT) {
2272 i++;
2273 continue;
2274 }
2275 pdev = pci_get_device(PCI_VENDOR_ID_SPECIALIX,
2276 PCI_DEVICE_ID_SPECIALIX_IO8, pdev);
2277 if (!pdev)
2278 break;
2279
2280 if (pci_enable_device(pdev))
2281 continue;
2282
2283 sx_board[i].irq = pdev->irq;
2284
2285 sx_board[i].base = pci_resource_start(pdev, 2);
2286
2287 sx_board[i].flags |= SX_BOARD_IS_PCI;
2288 if (!sx_probe(&sx_board[i]))
2289 found++;
2290 }
2291 /* May exit pci_get sequence early with lots of boards */
2292 if (pdev != NULL)
2293 pci_dev_put(pdev);
2294 }
2295 #endif
2296
2297 if (!found) {
2298 sx_release_drivers();
2299 printk(KERN_INFO "sx: No specialix IO8+ boards detected.\n");
2300 func_exit();
2301 return -EIO;
2302 }
2303
2304 func_exit();
2305 return 0;
2306 }
2307
2308 static int iobase[SX_NBOARD] = {0,};
2309 static int irq[SX_NBOARD] = {0,};
2310
2311 module_param_array(iobase, int, NULL, 0);
2312 module_param_array(irq, int, NULL, 0);
2313 module_param(sx_debug, int, 0);
2314 module_param(sx_rtscts, int, 0);
2315 module_param(sx_rxfifo, int, 0);
2316
2317 /*
2318 * You can setup up to 4 boards.
2319 * by specifying "iobase=0xXXX,0xXXX ..." as insmod parameter.
2320 * You should specify the IRQs too in that case "irq=....,...".
2321 *
2322 * More than 4 boards in one computer is not possible, as the card can
2323 * only use 4 different interrupts.
2324 *
2325 */
2326 static int __init specialix_init_module(void)
2327 {
2328 int i;
2329
2330 func_enter();
2331
2332 if (iobase[0] || iobase[1] || iobase[2] || iobase[3]) {
2333 for (i = 0; i < SX_NBOARD; i++) {
2334 sx_board[i].base = iobase[i];
2335 sx_board[i].irq = irq[i];
2336 sx_board[i].count = 0;
2337 }
2338 }
2339
2340 func_exit();
2341
2342 return specialix_init();
2343 }
2344
2345 static void __exit specialix_exit_module(void)
2346 {
2347 int i;
2348
2349 func_enter();
2350
2351 sx_release_drivers();
2352 for (i = 0; i < SX_NBOARD; i++)
2353 if (sx_board[i].flags & SX_BOARD_PRESENT)
2354 sx_release_io_range(&sx_board[i]);
2355 func_exit();
2356 }
2357
2358 static struct pci_device_id specialx_pci_tbl[] __devinitdata __used = {
2359 { PCI_DEVICE(PCI_VENDOR_ID_SPECIALIX, PCI_DEVICE_ID_SPECIALIX_IO8) },
2360 { }
2361 };
2362 MODULE_DEVICE_TABLE(pci, specialx_pci_tbl);
2363
2364 module_init(specialix_init_module);
2365 module_exit(specialix_exit_module);
2366
2367 MODULE_LICENSE("GPL");
2368 MODULE_ALIAS_CHARDEV_MAJOR(SPECIALIX_NORMAL_MAJOR);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree