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ptrace: kill __ptrace_detach(), fix ->exit_state check
[linux-2.6/mini2440.git] / drivers / char / sx.c
blob518f2a25d91ec6b1a208c6fe233c505a7395aa47
1 /* sx.c -- driver for the Specialix SX series cards.
2 *
3 * This driver will also support the older SI, and XIO cards.
4 *
5 *
6 * (C) 1998 - 2004 R.E.Wolff@BitWizard.nl
7 *
8 * Simon Allen (simonallen@cix.compulink.co.uk) wrote a previous
9 * version of this driver. Some fragments may have been copied. (none
10 * yet :-)
11 *
12 * Specialix pays for the development and support of this driver.
13 * Please DO contact support@specialix.co.uk if you require
14 * support. But please read the documentation (sx.txt) first.
15 *
16 *
17 *
18 * This program is free software; you can redistribute it and/or
19 * modify it under the terms of the GNU General Public License as
20 * published by the Free Software Foundation; either version 2 of
21 * the License, or (at your option) any later version.
22 *
23 * This program is distributed in the hope that it will be
24 * useful, but WITHOUT ANY WARRANTY; without even the implied
25 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
26 * PURPOSE. See the GNU General Public License for more details.
27 *
28 * You should have received a copy of the GNU General Public
29 * License along with this program; if not, write to the Free
30 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139,
31 * USA.
32 *
33 * Revision history:
34 * Revision 1.33 2000/03/09 10:00:00 pvdl,wolff
35 * - Fixed module and port counting
36 * - Fixed signal handling
37 * - Fixed an Ooops
38 *
39 * Revision 1.32 2000/03/07 09:00:00 wolff,pvdl
40 * - Fixed some sx_dprintk typos
41 * - added detection for an invalid board/module configuration
42 *
43 * Revision 1.31 2000/03/06 12:00:00 wolff,pvdl
44 * - Added support for EISA
45 *
46 * Revision 1.30 2000/01/21 17:43:06 wolff
47 * - Added support for SX+
48 *
49 * Revision 1.26 1999/08/05 15:22:14 wolff
50 * - Port to 2.3.x
51 * - Reformatted to Linus' liking.
52 *
53 * Revision 1.25 1999/07/30 14:24:08 wolff
54 * Had accidentally left "gs_debug" set to "-1" instead of "off" (=0).
55 *
56 * Revision 1.24 1999/07/28 09:41:52 wolff
57 * - I noticed the remark about use-count straying in sx.txt. I checked
58 * sx_open, and found a few places where that could happen. I hope it's
59 * fixed now.
60 *
61 * Revision 1.23 1999/07/28 08:56:06 wolff
62 * - Fixed crash when sx_firmware run twice.
63 * - Added sx_slowpoll as a module parameter (I guess nobody really wanted
64 * to change it from the default... )
65 * - Fixed a stupid editing problem I introduced in 1.22.
66 * - Fixed dropping characters on a termios change.
67 *
68 * Revision 1.22 1999/07/26 21:01:43 wolff
69 * Russell Brown noticed that I had overlooked 4 out of six modem control
70 * signals in sx_getsignals. Ooops.
71 *
72 * Revision 1.21 1999/07/23 09:11:33 wolff
73 * I forgot to free dynamically allocated memory when the driver is unloaded.
74 *
75 * Revision 1.20 1999/07/20 06:25:26 wolff
76 * The "closing wait" wasn't honoured. Thanks to James Griffiths for
77 * reporting this.
78 *
79 * Revision 1.19 1999/07/11 08:59:59 wolff
80 * Fixed an oops in close, when an open was pending. Changed the memtest
81 * a bit. Should also test the board in word-mode, however my card fails the
82 * memtest then. I still have to figure out what is wrong...
83 *
84 * Revision 1.18 1999/06/10 09:38:42 wolff
85 * Changed the format of the firmware revision from %04x to %x.%02x .
86 *
87 * Revision 1.17 1999/06/04 09:44:35 wolff
88 * fixed problem: reference to pci stuff when config_pci was off...
89 * Thanks to Jorge Novo for noticing this.
90 *
91 * Revision 1.16 1999/06/02 08:30:15 wolff
92 * added/removed the workaround for the DCD bug in the Firmware.
93 * A bit more debugging code to locate that...
94 *
95 * Revision 1.15 1999/06/01 11:35:30 wolff
96 * when DCD is left low (floating?), on TA's the firmware first tells us
97 * that DCD is high, but after a short while suddenly comes to the
98 * conclusion that it is low. All this would be fine, if it weren't that
99 * Unix requires us to send a "hangup" signal in that case. This usually
100 * all happens BEFORE the program has had a chance to ioctl the device
101 * into clocal mode..
102 *
103 * Revision 1.14 1999/05/25 11:18:59 wolff
104 * Added PCI-fix.
105 * Added checks for return code of sx_sendcommand.
106 * Don't issue "reconfig" if port isn't open yet. (bit us on TA modules...)
107 *
108 * Revision 1.13 1999/04/29 15:18:01 wolff
109 * Fixed an "oops" that showed on SuSE 6.0 systems.
110 * Activate DTR again after stty 0.
111 *
112 * Revision 1.12 1999/04/29 07:49:52 wolff
113 * Improved "stty 0" handling a bit. (used to change baud to 9600 assuming
114 * the connection would be dropped anyway. That is not always the case,
115 * and confuses people).
116 * Told the card to always monitor the modem signals.
117 * Added support for dynamic gs_debug adjustments.
118 * Now tells the rest of the system the number of ports.
119 *
120 * Revision 1.11 1999/04/24 11:11:30 wolff
121 * Fixed two stupid typos in the memory test.
122 *
123 * Revision 1.10 1999/04/24 10:53:39 wolff
124 * Added some of Christian's suggestions.
125 * Fixed an HW_COOK_IN bug (ISIG was not in I_OTHER. We used to trust the
126 * card to send the signal to the process.....)
127 *
128 * Revision 1.9 1999/04/23 07:26:38 wolff
129 * Included Christian Lademann's 2.0 compile-warning fixes and interrupt
130 * assignment redesign.
131 * Cleanup of some other stuff.
132 *
133 * Revision 1.8 1999/04/16 13:05:30 wolff
134 * fixed a DCD change unnoticed bug.
135 *
136 * Revision 1.7 1999/04/14 22:19:51 wolff
137 * Fixed typo that showed up in 2.0.x builds (get_user instead of Get_user!)
138 *
139 * Revision 1.6 1999/04/13 18:40:20 wolff
140 * changed misc-minor to 161, as assigned by HPA.
141 *
142 * Revision 1.5 1999/04/13 15:12:25 wolff
143 * Fixed use-count leak when "hangup" occurred.
144 * Added workaround for a stupid-PCIBIOS bug.
145 *
146 *
147 * Revision 1.4 1999/04/01 22:47:40 wolff
148 * Fixed < 1M linux-2.0 problem.
149 * (vremap isn't compatible with ioremap in that case)
150 *
151 * Revision 1.3 1999/03/31 13:45:45 wolff
152 * Firmware loading is now done through a separate IOCTL.
153 *
154 * Revision 1.2 1999/03/28 12:22:29 wolff
155 * rcs cleanup
156 *
157 * Revision 1.1 1999/03/28 12:10:34 wolff
158 * Readying for release on 2.0.x (sorry David, 1.01 becomes 1.1 for RCS).
159 *
160 * Revision 0.12 1999/03/28 09:20:10 wolff
161 * Fixed problem in 0.11, continueing cleanup.
162 *
163 * Revision 0.11 1999/03/28 08:46:44 wolff
164 * cleanup. Not good.
165 *
166 * Revision 0.10 1999/03/28 08:09:43 wolff
167 * Fixed loosing characters on close.
168 *
169 * Revision 0.9 1999/03/21 22:52:01 wolff
170 * Ported back to 2.2.... (minor things)
171 *
172 * Revision 0.8 1999/03/21 22:40:33 wolff
173 * Port to 2.0
174 *
175 * Revision 0.7 1999/03/21 19:06:34 wolff
176 * Fixed hangup processing.
177 *
178 * Revision 0.6 1999/02/05 08:45:14 wolff
179 * fixed real_raw problems. Inclusion into kernel imminent.
180 *
181 * Revision 0.5 1998/12/21 23:51:06 wolff
182 * Snatched a nasty bug: sx_transmit_chars was getting re-entered, and it
183 * shouldn't have. THATs why I want to have transmit interrupts even when
184 * the buffer is empty.
185 *
186 * Revision 0.4 1998/12/17 09:34:46 wolff
187 * PPP works. ioctl works. Basically works!
188 *
189 * Revision 0.3 1998/12/15 13:05:18 wolff
190 * It works! Wow! Gotta start implementing IOCTL and stuff....
191 *
192 * Revision 0.2 1998/12/01 08:33:53 wolff
193 * moved over to 2.1.130
194 *
195 * Revision 0.1 1998/11/03 21:23:51 wolff
196 * Initial revision. Detects SX card.
197 *
198 * */
199
200 #define SX_VERSION 1.33
201
202 #include <linux/module.h>
203 #include <linux/kdev_t.h>
204 #include <linux/kernel.h>
205 #include <linux/sched.h>
206 #include <linux/ioport.h>
207 #include <linux/interrupt.h>
208 #include <linux/errno.h>
209 #include <linux/tty.h>
210 #include <linux/tty_flip.h>
211 #include <linux/mm.h>
212 #include <linux/serial.h>
213 #include <linux/fcntl.h>
214 #include <linux/major.h>
215 #include <linux/delay.h>
216 #include <linux/eisa.h>
217 #include <linux/pci.h>
218 #include <linux/slab.h>
219 #include <linux/init.h>
220 #include <linux/miscdevice.h>
221 #include <linux/bitops.h>
222
223 #include <asm/io.h>
224 #include <asm/uaccess.h>
225
226 /* The 3.0.0 version of sxboards/sxwindow.h uses BYTE and WORD.... */
227 #define BYTE u8
228 #define WORD u16
229
230 /* .... but the 3.0.4 version uses _u8 and _u16. */
231 #define _u8 u8
232 #define _u16 u16
233
234 #include "sxboards.h"
235 #include "sxwindow.h"
236
237 #include <linux/generic_serial.h>
238 #include "sx.h"
239
240 /* I don't think that this driver can handle more than 256 ports on
241 one machine. You'll have to increase the number of boards in sx.h
242 if you want more than 4 boards. */
243
244 #ifndef PCI_DEVICE_ID_SPECIALIX_SX_XIO_IO8
245 #define PCI_DEVICE_ID_SPECIALIX_SX_XIO_IO8 0x2000
246 #endif
247
248 /* Configurable options:
249 (Don't be too sure that it'll work if you toggle them) */
250
251 /* Am I paranoid or not ? ;-) */
252 #undef SX_PARANOIA_CHECK
253
254 /* 20 -> 2000 per second. The card should rate-limit interrupts at 100
255 Hz, but it is user configurable. I don't recommend going above 1000
256 Hz. The interrupt ratelimit might trigger if the interrupt is
257 shared with a very active other device. */
258 #define IRQ_RATE_LIMIT 20
259
260 /* Sharing interrupts is possible now. If the other device wants more
261 than 2000 interrupts per second, we'd gracefully decline further
262 interrupts. That's not what we want. On the other hand, if the
263 other device interrupts 2000 times a second, don't use the SX
264 interrupt. Use polling. */
265 #undef IRQ_RATE_LIMIT
266
267 #if 0
268 /* Not implemented */
269 /*
270 * The following defines are mostly for testing purposes. But if you need
271 * some nice reporting in your syslog, you can define them also.
272 */
273 #define SX_REPORT_FIFO
274 #define SX_REPORT_OVERRUN
275 #endif
276
277 /* Function prototypes */
278 static void sx_disable_tx_interrupts(void *ptr);
279 static void sx_enable_tx_interrupts(void *ptr);
280 static void sx_disable_rx_interrupts(void *ptr);
281 static void sx_enable_rx_interrupts(void *ptr);
282 static int sx_carrier_raised(struct tty_port *port);
283 static void sx_shutdown_port(void *ptr);
284 static int sx_set_real_termios(void *ptr);
285 static void sx_close(void *ptr);
286 static int sx_chars_in_buffer(void *ptr);
287 static int sx_init_board(struct sx_board *board);
288 static int sx_init_portstructs(int nboards, int nports);
289 static long sx_fw_ioctl(struct file *filp, unsigned int cmd,
290 unsigned long arg);
291 static int sx_init_drivers(void);
292
293 static struct tty_driver *sx_driver;
294
295 static DEFINE_MUTEX(sx_boards_lock);
296 static struct sx_board boards[SX_NBOARDS];
297 static struct sx_port *sx_ports;
298 static int sx_initialized;
299 static int sx_nports;
300 static int sx_debug;
301
302 /* You can have the driver poll your card.
303 - Set sx_poll to 1 to poll every timer tick (10ms on Intel).
304 This is used when the card cannot use an interrupt for some reason.
305
306 - set sx_slowpoll to 100 to do an extra poll once a second (on Intel). If
307 the driver misses an interrupt (report this if it DOES happen to you!)
308 everything will continue to work....
309 */
310 static int sx_poll = 1;
311 static int sx_slowpoll;
312
313 /* The card limits the number of interrupts per second.
314 At 115k2 "100" should be sufficient.
315 If you're using higher baudrates, you can increase this...
316 */
317
318 static int sx_maxints = 100;
319
320 #ifdef CONFIG_ISA
321
322 /* These are the only open spaces in my computer. Yours may have more
323 or less.... -- REW
324 duh: Card at 0xa0000 is possible on HP Netserver?? -- pvdl
325 */
326 static int sx_probe_addrs[] = {
327 0xc0000, 0xd0000, 0xe0000,
328 0xc8000, 0xd8000, 0xe8000
329 };
330 static int si_probe_addrs[] = {
331 0xc0000, 0xd0000, 0xe0000,
332 0xc8000, 0xd8000, 0xe8000, 0xa0000
333 };
334 static int si1_probe_addrs[] = {
335 0xd0000
336 };
337
338 #define NR_SX_ADDRS ARRAY_SIZE(sx_probe_addrs)
339 #define NR_SI_ADDRS ARRAY_SIZE(si_probe_addrs)
340 #define NR_SI1_ADDRS ARRAY_SIZE(si1_probe_addrs)
341
342 module_param_array(sx_probe_addrs, int, NULL, 0);
343 module_param_array(si_probe_addrs, int, NULL, 0);
344 #endif
345
346 /* Set the mask to all-ones. This alas, only supports 32 interrupts.
347 Some architectures may need more. */
348 static int sx_irqmask = -1;
349
350 module_param(sx_poll, int, 0);
351 module_param(sx_slowpoll, int, 0);
352 module_param(sx_maxints, int, 0);
353 module_param(sx_debug, int, 0);
354 module_param(sx_irqmask, int, 0);
355
356 MODULE_LICENSE("GPL");
357
358 static struct real_driver sx_real_driver = {
359 sx_disable_tx_interrupts,
360 sx_enable_tx_interrupts,
361 sx_disable_rx_interrupts,
362 sx_enable_rx_interrupts,
363 sx_shutdown_port,
364 sx_set_real_termios,
365 sx_chars_in_buffer,
366 sx_close,
367 };
368
369 /*
370 This driver can spew a whole lot of debugging output at you. If you
371 need maximum performance, you should disable the DEBUG define. To
372 aid in debugging in the field, I'm leaving the compile-time debug
373 features enabled, and disable them "runtime". That allows me to
374 instruct people with problems to enable debugging without requiring
375 them to recompile...
376 */
377 #define DEBUG
378
379 #ifdef DEBUG
380 #define sx_dprintk(f, str...) if (sx_debug & f) printk (str)
381 #else
382 #define sx_dprintk(f, str...) /* nothing */
383 #endif
384
385 #define func_enter() sx_dprintk(SX_DEBUG_FLOW, "sx: enter %s\n",__func__)
386 #define func_exit() sx_dprintk(SX_DEBUG_FLOW, "sx: exit %s\n",__func__)
387
388 #define func_enter2() sx_dprintk(SX_DEBUG_FLOW, "sx: enter %s (port %d)\n", \
389 __func__, port->line)
390
391 /*
392 * Firmware loader driver specific routines
393 *
394 */
395
396 static const struct file_operations sx_fw_fops = {
397 .owner = THIS_MODULE,
398 .unlocked_ioctl = sx_fw_ioctl,
399 };
400
401 static struct miscdevice sx_fw_device = {
402 SXCTL_MISC_MINOR, "sxctl", &sx_fw_fops
403 };
404
405 #ifdef SX_PARANOIA_CHECK
406
407 /* This doesn't work. Who's paranoid around here? Not me! */
408
409 static inline int sx_paranoia_check(struct sx_port const *port,
410 char *name, const char *routine)
411 {
412 static const char *badmagic = KERN_ERR "sx: Warning: bad sx port magic "
413 "number for device %s in %s\n";
414 static const char *badinfo = KERN_ERR "sx: Warning: null sx port for "
415 "device %s in %s\n";
416
417 if (!port) {
418 printk(badinfo, name, routine);
419 return 1;
420 }
421 if (port->magic != SX_MAGIC) {
422 printk(badmagic, name, routine);
423 return 1;
424 }
425
426 return 0;
427 }
428 #else
429 #define sx_paranoia_check(a,b,c) 0
430 #endif
431
432 /* The timeouts. First try 30 times as fast as possible. Then give
433 the card some time to breathe between accesses. (Otherwise the
434 processor on the card might not be able to access its OWN bus... */
435
436 #define TIMEOUT_1 30
437 #define TIMEOUT_2 1000000
438
439 #ifdef DEBUG
440 static void my_hd_io(void __iomem *p, int len)
441 {
442 int i, j, ch;
443 unsigned char __iomem *addr = p;
444
445 for (i = 0; i < len; i += 16) {
446 printk("%p ", addr + i);
447 for (j = 0; j < 16; j++) {
448 printk("%02x %s", readb(addr + j + i),
449 (j == 7) ? " " : "");
450 }
451 for (j = 0; j < 16; j++) {
452 ch = readb(addr + j + i);
453 printk("%c", (ch < 0x20) ? '.' :
454 ((ch > 0x7f) ? '.' : ch));
455 }
456 printk("\n");
457 }
458 }
459 static void my_hd(void *p, int len)
460 {
461 int i, j, ch;
462 unsigned char *addr = p;
463
464 for (i = 0; i < len; i += 16) {
465 printk("%p ", addr + i);
466 for (j = 0; j < 16; j++) {
467 printk("%02x %s", addr[j + i], (j == 7) ? " " : "");
468 }
469 for (j = 0; j < 16; j++) {
470 ch = addr[j + i];
471 printk("%c", (ch < 0x20) ? '.' :
472 ((ch > 0x7f) ? '.' : ch));
473 }
474 printk("\n");
475 }
476 }
477 #endif
478
479 /* This needs redoing for Alpha -- REW -- Done. */
480
481 static inline void write_sx_byte(struct sx_board *board, int offset, u8 byte)
482 {
483 writeb(byte, board->base + offset);
484 }
485
486 static inline u8 read_sx_byte(struct sx_board *board, int offset)
487 {
488 return readb(board->base + offset);
489 }
490
491 static inline void write_sx_word(struct sx_board *board, int offset, u16 word)
492 {
493 writew(word, board->base + offset);
494 }
495
496 static inline u16 read_sx_word(struct sx_board *board, int offset)
497 {
498 return readw(board->base + offset);
499 }
500
501 static int sx_busy_wait_eq(struct sx_board *board,
502 int offset, int mask, int correctval)
503 {
504 int i;
505
506 func_enter();
507
508 for (i = 0; i < TIMEOUT_1; i++)
509 if ((read_sx_byte(board, offset) & mask) == correctval) {
510 func_exit();
511 return 1;
512 }
513
514 for (i = 0; i < TIMEOUT_2; i++) {
515 if ((read_sx_byte(board, offset) & mask) == correctval) {
516 func_exit();
517 return 1;
518 }
519 udelay(1);
520 }
521
522 func_exit();
523 return 0;
524 }
525
526 static int sx_busy_wait_neq(struct sx_board *board,
527 int offset, int mask, int badval)
528 {
529 int i;
530
531 func_enter();
532
533 for (i = 0; i < TIMEOUT_1; i++)
534 if ((read_sx_byte(board, offset) & mask) != badval) {
535 func_exit();
536 return 1;
537 }
538
539 for (i = 0; i < TIMEOUT_2; i++) {
540 if ((read_sx_byte(board, offset) & mask) != badval) {
541 func_exit();
542 return 1;
543 }
544 udelay(1);
545 }
546
547 func_exit();
548 return 0;
549 }
550
551 /* 5.6.4 of 6210028 r2.3 */
552 static int sx_reset(struct sx_board *board)
553 {
554 func_enter();
555
556 if (IS_SX_BOARD(board)) {
557
558 write_sx_byte(board, SX_CONFIG, 0);
559 write_sx_byte(board, SX_RESET, 1); /* Value doesn't matter */
560
561 if (!sx_busy_wait_eq(board, SX_RESET_STATUS, 1, 0)) {
562 printk(KERN_INFO "sx: Card doesn't respond to "
563 "reset...\n");
564 return 0;
565 }
566 } else if (IS_EISA_BOARD(board)) {
567 outb(board->irq << 4, board->eisa_base + 0xc02);
568 } else if (IS_SI1_BOARD(board)) {
569 write_sx_byte(board, SI1_ISA_RESET, 0); /*value doesn't matter*/
570 } else {
571 /* Gory details of the SI/ISA board */
572 write_sx_byte(board, SI2_ISA_RESET, SI2_ISA_RESET_SET);
573 write_sx_byte(board, SI2_ISA_IRQ11, SI2_ISA_IRQ11_CLEAR);
574 write_sx_byte(board, SI2_ISA_IRQ12, SI2_ISA_IRQ12_CLEAR);
575 write_sx_byte(board, SI2_ISA_IRQ15, SI2_ISA_IRQ15_CLEAR);
576 write_sx_byte(board, SI2_ISA_INTCLEAR, SI2_ISA_INTCLEAR_CLEAR);
577 write_sx_byte(board, SI2_ISA_IRQSET, SI2_ISA_IRQSET_CLEAR);
578 }
579
580 func_exit();
581 return 1;
582 }
583
584 /* This doesn't work on machines where "NULL" isn't 0 */
585 /* If you have one of those, someone will need to write
586 the equivalent of this, which will amount to about 3 lines. I don't
587 want to complicate this right now. -- REW
588 (See, I do write comments every now and then :-) */
589 #define OFFSETOF(strct, elem) ((long)&(((struct strct *)NULL)->elem))
590
591 #define CHAN_OFFSET(port,elem) (port->ch_base + OFFSETOF (_SXCHANNEL, elem))
592 #define MODU_OFFSET(board,addr,elem) (addr + OFFSETOF (_SXMODULE, elem))
593 #define BRD_OFFSET(board,elem) (OFFSETOF (_SXCARD, elem))
594
595 #define sx_write_channel_byte(port, elem, val) \
596 write_sx_byte (port->board, CHAN_OFFSET (port, elem), val)
597
598 #define sx_read_channel_byte(port, elem) \
599 read_sx_byte (port->board, CHAN_OFFSET (port, elem))
600
601 #define sx_write_channel_word(port, elem, val) \
602 write_sx_word (port->board, CHAN_OFFSET (port, elem), val)
603
604 #define sx_read_channel_word(port, elem) \
605 read_sx_word (port->board, CHAN_OFFSET (port, elem))
606
607 #define sx_write_module_byte(board, addr, elem, val) \
608 write_sx_byte (board, MODU_OFFSET (board, addr, elem), val)
609
610 #define sx_read_module_byte(board, addr, elem) \
611 read_sx_byte (board, MODU_OFFSET (board, addr, elem))
612
613 #define sx_write_module_word(board, addr, elem, val) \
614 write_sx_word (board, MODU_OFFSET (board, addr, elem), val)
615
616 #define sx_read_module_word(board, addr, elem) \
617 read_sx_word (board, MODU_OFFSET (board, addr, elem))
618
619 #define sx_write_board_byte(board, elem, val) \
620 write_sx_byte (board, BRD_OFFSET (board, elem), val)
621
622 #define sx_read_board_byte(board, elem) \
623 read_sx_byte (board, BRD_OFFSET (board, elem))
624
625 #define sx_write_board_word(board, elem, val) \
626 write_sx_word (board, BRD_OFFSET (board, elem), val)
627
628 #define sx_read_board_word(board, elem) \
629 read_sx_word (board, BRD_OFFSET (board, elem))
630
631 static int sx_start_board(struct sx_board *board)
632 {
633 if (IS_SX_BOARD(board)) {
634 write_sx_byte(board, SX_CONFIG, SX_CONF_BUSEN);
635 } else if (IS_EISA_BOARD(board)) {
636 write_sx_byte(board, SI2_EISA_OFF, SI2_EISA_VAL);
637 outb((board->irq << 4) | 4, board->eisa_base + 0xc02);
638 } else if (IS_SI1_BOARD(board)) {
639 write_sx_byte(board, SI1_ISA_RESET_CLEAR, 0);
640 write_sx_byte(board, SI1_ISA_INTCL, 0);
641 } else {
642 /* Don't bug me about the clear_set.
643 I haven't the foggiest idea what it's about -- REW */
644 write_sx_byte(board, SI2_ISA_RESET, SI2_ISA_RESET_CLEAR);
645 write_sx_byte(board, SI2_ISA_INTCLEAR, SI2_ISA_INTCLEAR_SET);
646 }
647 return 1;
648 }
649
650 #define SX_IRQ_REG_VAL(board) \
651 ((board->flags & SX_ISA_BOARD) ? (board->irq << 4) : 0)
652
653 /* Note. The SX register is write-only. Therefore, we have to enable the
654 bus too. This is a no-op, if you don't mess with this driver... */
655 static int sx_start_interrupts(struct sx_board *board)
656 {
657
658 /* Don't call this with board->irq == 0 */
659
660 if (IS_SX_BOARD(board)) {
661 write_sx_byte(board, SX_CONFIG, SX_IRQ_REG_VAL(board) |
662 SX_CONF_BUSEN | SX_CONF_HOSTIRQ);
663 } else if (IS_EISA_BOARD(board)) {
664 inb(board->eisa_base + 0xc03);
665 } else if (IS_SI1_BOARD(board)) {
666 write_sx_byte(board, SI1_ISA_INTCL, 0);
667 write_sx_byte(board, SI1_ISA_INTCL_CLEAR, 0);
668 } else {
669 switch (board->irq) {
670 case 11:
671 write_sx_byte(board, SI2_ISA_IRQ11, SI2_ISA_IRQ11_SET);
672 break;
673 case 12:
674 write_sx_byte(board, SI2_ISA_IRQ12, SI2_ISA_IRQ12_SET);
675 break;
676 case 15:
677 write_sx_byte(board, SI2_ISA_IRQ15, SI2_ISA_IRQ15_SET);
678 break;
679 default:
680 printk(KERN_INFO "sx: SI/XIO card doesn't support "
681 "interrupt %d.\n", board->irq);
682 return 0;
683 }
684 write_sx_byte(board, SI2_ISA_INTCLEAR, SI2_ISA_INTCLEAR_SET);
685 }
686
687 return 1;
688 }
689
690 static int sx_send_command(struct sx_port *port,
691 int command, int mask, int newstat)
692 {
693 func_enter2();
694 write_sx_byte(port->board, CHAN_OFFSET(port, hi_hstat), command);
695 func_exit();
696 return sx_busy_wait_eq(port->board, CHAN_OFFSET(port, hi_hstat), mask,
697 newstat);
698 }
699
700 static char *mod_type_s(int module_type)
701 {
702 switch (module_type) {
703 case TA4:
704 return "TA4";
705 case TA8:
706 return "TA8";
707 case TA4_ASIC:
708 return "TA4_ASIC";
709 case TA8_ASIC:
710 return "TA8_ASIC";
711 case MTA_CD1400:
712 return "MTA_CD1400";
713 case SXDC:
714 return "SXDC";
715 default:
716 return "Unknown/invalid";
717 }
718 }
719
720 static char *pan_type_s(int pan_type)
721 {
722 switch (pan_type) {
723 case MOD_RS232DB25:
724 return "MOD_RS232DB25";
725 case MOD_RS232RJ45:
726 return "MOD_RS232RJ45";
727 case MOD_RS422DB25:
728 return "MOD_RS422DB25";
729 case MOD_PARALLEL:
730 return "MOD_PARALLEL";
731 case MOD_2_RS232DB25:
732 return "MOD_2_RS232DB25";
733 case MOD_2_RS232RJ45:
734 return "MOD_2_RS232RJ45";
735 case MOD_2_RS422DB25:
736 return "MOD_2_RS422DB25";
737 case MOD_RS232DB25MALE:
738 return "MOD_RS232DB25MALE";
739 case MOD_2_PARALLEL:
740 return "MOD_2_PARALLEL";
741 case MOD_BLANK:
742 return "empty";
743 default:
744 return "invalid";
745 }
746 }
747
748 static int mod_compat_type(int module_type)
749 {
750 return module_type >> 4;
751 }
752
753 static void sx_reconfigure_port(struct sx_port *port)
754 {
755 if (sx_read_channel_byte(port, hi_hstat) == HS_IDLE_OPEN) {
756 if (sx_send_command(port, HS_CONFIG, -1, HS_IDLE_OPEN) != 1) {
757 printk(KERN_WARNING "sx: Sent reconfigure command, but "
758 "card didn't react.\n");
759 }
760 } else {
761 sx_dprintk(SX_DEBUG_TERMIOS, "sx: Not sending reconfigure: "
762 "port isn't open (%02x).\n",
763 sx_read_channel_byte(port, hi_hstat));
764 }
765 }
766
767 static void sx_setsignals(struct sx_port *port, int dtr, int rts)
768 {
769 int t;
770 func_enter2();
771
772 t = sx_read_channel_byte(port, hi_op);
773 if (dtr >= 0)
774 t = dtr ? (t | OP_DTR) : (t & ~OP_DTR);
775 if (rts >= 0)
776 t = rts ? (t | OP_RTS) : (t & ~OP_RTS);
777 sx_write_channel_byte(port, hi_op, t);
778 sx_dprintk(SX_DEBUG_MODEMSIGNALS, "setsignals: %d/%d\n", dtr, rts);
779
780 func_exit();
781 }
782
783 static int sx_getsignals(struct sx_port *port)
784 {
785 int i_stat, o_stat;
786
787 o_stat = sx_read_channel_byte(port, hi_op);
788 i_stat = sx_read_channel_byte(port, hi_ip);
789
790 sx_dprintk(SX_DEBUG_MODEMSIGNALS, "getsignals: %d/%d (%d/%d) "
791 "%02x/%02x\n",
792 (o_stat & OP_DTR) != 0, (o_stat & OP_RTS) != 0,
793 port->c_dcd, tty_port_carrier_raised(&port->gs.port),
794 sx_read_channel_byte(port, hi_ip),
795 sx_read_channel_byte(port, hi_state));
796
797 return (((o_stat & OP_DTR) ? TIOCM_DTR : 0) |
798 ((o_stat & OP_RTS) ? TIOCM_RTS : 0) |
799 ((i_stat & IP_CTS) ? TIOCM_CTS : 0) |
800 ((i_stat & IP_DCD) ? TIOCM_CAR : 0) |
801 ((i_stat & IP_DSR) ? TIOCM_DSR : 0) |
802 ((i_stat & IP_RI) ? TIOCM_RNG : 0));
803 }
804
805 static void sx_set_baud(struct sx_port *port)
806 {
807 int t;
808
809 if (port->board->ta_type == MOD_SXDC) {
810 switch (port->gs.baud) {
811 /* Save some typing work... */
812 #define e(x) case x: t = BAUD_ ## x; break
813 e(50);
814 e(75);
815 e(110);
816 e(150);
817 e(200);
818 e(300);
819 e(600);
820 e(1200);
821 e(1800);
822 e(2000);
823 e(2400);
824 e(4800);
825 e(7200);
826 e(9600);
827 e(14400);
828 e(19200);
829 e(28800);
830 e(38400);
831 e(56000);
832 e(57600);
833 e(64000);
834 e(76800);
835 e(115200);
836 e(128000);
837 e(150000);
838 e(230400);
839 e(256000);
840 e(460800);
841 e(921600);
842 case 134:
843 t = BAUD_134_5;
844 break;
845 case 0:
846 t = -1;
847 break;
848 default:
849 /* Can I return "invalid"? */
850 t = BAUD_9600;
851 printk(KERN_INFO "sx: unsupported baud rate: %d.\n",
852 port->gs.baud);
853 break;
854 }
855 #undef e
856 if (t > 0) {
857 /* The baud rate is not set to 0, so we're enabeling DTR... -- REW */
858 sx_setsignals(port, 1, -1);
859 /* XXX This is not TA & MTA compatible */
860 sx_write_channel_byte(port, hi_csr, 0xff);
861
862 sx_write_channel_byte(port, hi_txbaud, t);
863 sx_write_channel_byte(port, hi_rxbaud, t);
864 } else {
865 sx_setsignals(port, 0, -1);
866 }
867 } else {
868 switch (port->gs.baud) {
869 #define e(x) case x: t = CSR_ ## x; break
870 e(75);
871 e(150);
872 e(300);
873 e(600);
874 e(1200);
875 e(2400);
876 e(4800);
877 e(1800);
878 e(9600);
879 e(19200);
880 e(57600);
881 e(38400);
882 /* TA supports 110, but not 115200, MTA supports 115200, but not 110 */
883 case 110:
884 if (port->board->ta_type == MOD_TA) {
885 t = CSR_110;
886 break;
887 } else {
888 t = CSR_9600;
889 printk(KERN_INFO "sx: Unsupported baud rate: "
890 "%d.\n", port->gs.baud);
891 break;
892 }
893 case 115200:
894 if (port->board->ta_type == MOD_TA) {
895 t = CSR_9600;
896 printk(KERN_INFO "sx: Unsupported baud rate: "
897 "%d.\n", port->gs.baud);
898 break;
899 } else {
900 t = CSR_110;
901 break;
902 }
903 case 0:
904 t = -1;
905 break;
906 default:
907 t = CSR_9600;
908 printk(KERN_INFO "sx: Unsupported baud rate: %d.\n",
909 port->gs.baud);
910 break;
911 }
912 #undef e
913 if (t >= 0) {
914 sx_setsignals(port, 1, -1);
915 sx_write_channel_byte(port, hi_csr, t * 0x11);
916 } else {
917 sx_setsignals(port, 0, -1);
918 }
919 }
920 }
921
922 /* Simon Allen's version of this routine was 225 lines long. 85 is a lot
923 better. -- REW */
924
925 static int sx_set_real_termios(void *ptr)
926 {
927 struct sx_port *port = ptr;
928
929 func_enter2();
930
931 if (!port->gs.port.tty)
932 return 0;
933
934 /* What is this doing here? -- REW
935 Ha! figured it out. It is to allow you to get DTR active again
936 if you've dropped it with stty 0. Moved to set_baud, where it
937 belongs (next to the drop dtr if baud == 0) -- REW */
938 /* sx_setsignals (port, 1, -1); */
939
940 sx_set_baud(port);
941
942 #define CFLAG port->gs.port.tty->termios->c_cflag
943 sx_write_channel_byte(port, hi_mr1,
944 (C_PARENB(port->gs.port.tty) ? MR1_WITH : MR1_NONE) |
945 (C_PARODD(port->gs.port.tty) ? MR1_ODD : MR1_EVEN) |
946 (C_CRTSCTS(port->gs.port.tty) ? MR1_RTS_RXFLOW : 0) |
947 (((CFLAG & CSIZE) == CS8) ? MR1_8_BITS : 0) |
948 (((CFLAG & CSIZE) == CS7) ? MR1_7_BITS : 0) |
949 (((CFLAG & CSIZE) == CS6) ? MR1_6_BITS : 0) |
950 (((CFLAG & CSIZE) == CS5) ? MR1_5_BITS : 0));
951
952 sx_write_channel_byte(port, hi_mr2,
953 (C_CRTSCTS(port->gs.port.tty) ? MR2_CTS_TXFLOW : 0) |
954 (C_CSTOPB(port->gs.port.tty) ? MR2_2_STOP :
955 MR2_1_STOP));
956
957 switch (CFLAG & CSIZE) {
958 case CS8:
959 sx_write_channel_byte(port, hi_mask, 0xff);
960 break;
961 case CS7:
962 sx_write_channel_byte(port, hi_mask, 0x7f);
963 break;
964 case CS6:
965 sx_write_channel_byte(port, hi_mask, 0x3f);
966 break;
967 case CS5:
968 sx_write_channel_byte(port, hi_mask, 0x1f);
969 break;
970 default:
971 printk(KERN_INFO "sx: Invalid wordsize: %u\n",
972 (unsigned int)CFLAG & CSIZE);
973 break;
974 }
975
976 sx_write_channel_byte(port, hi_prtcl,
977 (I_IXON(port->gs.port.tty) ? SP_TXEN : 0) |
978 (I_IXOFF(port->gs.port.tty) ? SP_RXEN : 0) |
979 (I_IXANY(port->gs.port.tty) ? SP_TANY : 0) | SP_DCEN);
980
981 sx_write_channel_byte(port, hi_break,
982 (I_IGNBRK(port->gs.port.tty) ? BR_IGN : 0 |
983 I_BRKINT(port->gs.port.tty) ? BR_INT : 0));
984
985 sx_write_channel_byte(port, hi_txon, START_CHAR(port->gs.port.tty));
986 sx_write_channel_byte(port, hi_rxon, START_CHAR(port->gs.port.tty));
987 sx_write_channel_byte(port, hi_txoff, STOP_CHAR(port->gs.port.tty));
988 sx_write_channel_byte(port, hi_rxoff, STOP_CHAR(port->gs.port.tty));
989
990 sx_reconfigure_port(port);
991
992 /* Tell line discipline whether we will do input cooking */
993 if (I_OTHER(port->gs.port.tty)) {
994 clear_bit(TTY_HW_COOK_IN, &port->gs.port.tty->flags);
995 } else {
996 set_bit(TTY_HW_COOK_IN, &port->gs.port.tty->flags);
997 }
998 sx_dprintk(SX_DEBUG_TERMIOS, "iflags: %x(%d) ",
999 (unsigned int)port->gs.port.tty->termios->c_iflag,
1000 I_OTHER(port->gs.port.tty));
1001
1002 /* Tell line discipline whether we will do output cooking.
1003 * If OPOST is set and no other output flags are set then we can do output
1004 * processing. Even if only *one* other flag in the O_OTHER group is set
1005 * we do cooking in software.
1006 */
1007 if (O_OPOST(port->gs.port.tty) && !O_OTHER(port->gs.port.tty)) {
1008 set_bit(TTY_HW_COOK_OUT, &port->gs.port.tty->flags);
1009 } else {
1010 clear_bit(TTY_HW_COOK_OUT, &port->gs.port.tty->flags);
1011 }
1012 sx_dprintk(SX_DEBUG_TERMIOS, "oflags: %x(%d)\n",
1013 (unsigned int)port->gs.port.tty->termios->c_oflag,
1014 O_OTHER(port->gs.port.tty));
1015 /* port->c_dcd = sx_get_CD (port); */
1016 func_exit();
1017 return 0;
1018 }
1019
1020 /* ********************************************************************** *
1021 * the interrupt related routines *
1022 * ********************************************************************** */
1023
1024 /* Note:
1025 Other drivers use the macro "MIN" to calculate how much to copy.
1026 This has the disadvantage that it will evaluate parts twice. That's
1027 expensive when it's IO (and the compiler cannot optimize those away!).
1028 Moreover, I'm not sure that you're race-free.
1029
1030 I assign a value, and then only allow the value to decrease. This
1031 is always safe. This makes the code a few lines longer, and you
1032 know I'm dead against that, but I think it is required in this
1033 case. */
1034
1035 static void sx_transmit_chars(struct sx_port *port)
1036 {
1037 int c;
1038 int tx_ip;
1039 int txroom;
1040
1041 func_enter2();
1042 sx_dprintk(SX_DEBUG_TRANSMIT, "Port %p: transmit %d chars\n",
1043 port, port->gs.xmit_cnt);
1044
1045 if (test_and_set_bit(SX_PORT_TRANSMIT_LOCK, &port->locks)) {
1046 return;
1047 }
1048
1049 while (1) {
1050 c = port->gs.xmit_cnt;
1051
1052 sx_dprintk(SX_DEBUG_TRANSMIT, "Copying %d ", c);
1053 tx_ip = sx_read_channel_byte(port, hi_txipos);
1054
1055 /* Took me 5 minutes to deduce this formula.
1056 Luckily it is literally in the manual in section 6.5.4.3.5 */
1057 txroom = (sx_read_channel_byte(port, hi_txopos) - tx_ip - 1) &
1058 0xff;
1059
1060 /* Don't copy more bytes than there is room for in the buffer */
1061 if (c > txroom)
1062 c = txroom;
1063 sx_dprintk(SX_DEBUG_TRANSMIT, " %d(%d) ", c, txroom);
1064
1065 /* Don't copy past the end of the hardware transmit buffer */
1066 if (c > 0x100 - tx_ip)
1067 c = 0x100 - tx_ip;
1068
1069 sx_dprintk(SX_DEBUG_TRANSMIT, " %d(%d) ", c, 0x100 - tx_ip);
1070
1071 /* Don't copy pas the end of the source buffer */
1072 if (c > SERIAL_XMIT_SIZE - port->gs.xmit_tail)
1073 c = SERIAL_XMIT_SIZE - port->gs.xmit_tail;
1074
1075 sx_dprintk(SX_DEBUG_TRANSMIT, " %d(%ld) \n",
1076 c, SERIAL_XMIT_SIZE - port->gs.xmit_tail);
1077
1078 /* If for one reason or another, we can't copy more data, we're
1079 done! */
1080 if (c == 0)
1081 break;
1082
1083 memcpy_toio(port->board->base + CHAN_OFFSET(port, hi_txbuf) +
1084 tx_ip, port->gs.xmit_buf + port->gs.xmit_tail, c);
1085
1086 /* Update the pointer in the card */
1087 sx_write_channel_byte(port, hi_txipos, (tx_ip + c) & 0xff);
1088
1089 /* Update the kernel buffer end */
1090 port->gs.xmit_tail = (port->gs.xmit_tail + c) &
1091 (SERIAL_XMIT_SIZE - 1);
1092
1093 /* This one last. (this is essential)
1094 It would allow others to start putting more data into the
1095 buffer! */
1096 port->gs.xmit_cnt -= c;
1097 }
1098
1099 if (port->gs.xmit_cnt == 0) {
1100 sx_disable_tx_interrupts(port);
1101 }
1102
1103 if ((port->gs.xmit_cnt <= port->gs.wakeup_chars) && port->gs.port.tty) {
1104 tty_wakeup(port->gs.port.tty);
1105 sx_dprintk(SX_DEBUG_TRANSMIT, "Waking up.... ldisc (%d)....\n",
1106 port->gs.wakeup_chars);
1107 }
1108
1109 clear_bit(SX_PORT_TRANSMIT_LOCK, &port->locks);
1110 func_exit();
1111 }
1112
1113 /* Note the symmetry between receiving chars and transmitting them!
1114 Note: The kernel should have implemented both a receive buffer and
1115 a transmit buffer. */
1116
1117 /* Inlined: Called only once. Remove the inline when you add another call */
1118 static inline void sx_receive_chars(struct sx_port *port)
1119 {
1120 int c;
1121 int rx_op;
1122 struct tty_struct *tty;
1123 int copied = 0;
1124 unsigned char *rp;
1125
1126 func_enter2();
1127 tty = port->gs.port.tty;
1128 while (1) {
1129 rx_op = sx_read_channel_byte(port, hi_rxopos);
1130 c = (sx_read_channel_byte(port, hi_rxipos) - rx_op) & 0xff;
1131
1132 sx_dprintk(SX_DEBUG_RECEIVE, "rxop=%d, c = %d.\n", rx_op, c);
1133
1134 /* Don't copy past the end of the hardware receive buffer */
1135 if (rx_op + c > 0x100)
1136 c = 0x100 - rx_op;
1137
1138 sx_dprintk(SX_DEBUG_RECEIVE, "c = %d.\n", c);
1139
1140 /* Don't copy more bytes than there is room for in the buffer */
1141
1142 c = tty_prepare_flip_string(tty, &rp, c);
1143
1144 sx_dprintk(SX_DEBUG_RECEIVE, "c = %d.\n", c);
1145
1146 /* If for one reason or another, we can't copy more data, we're done! */
1147 if (c == 0)
1148 break;
1149
1150 sx_dprintk(SX_DEBUG_RECEIVE, "Copying over %d chars. First is "
1151 "%d at %lx\n", c, read_sx_byte(port->board,
1152 CHAN_OFFSET(port, hi_rxbuf) + rx_op),
1153 CHAN_OFFSET(port, hi_rxbuf));
1154 memcpy_fromio(rp, port->board->base +
1155 CHAN_OFFSET(port, hi_rxbuf) + rx_op, c);
1156
1157 /* This one last. ( Not essential.)
1158 It allows the card to start putting more data into the
1159 buffer!
1160 Update the pointer in the card */
1161 sx_write_channel_byte(port, hi_rxopos, (rx_op + c) & 0xff);
1162
1163 copied += c;
1164 }
1165 if (copied) {
1166 struct timeval tv;
1167
1168 do_gettimeofday(&tv);
1169 sx_dprintk(SX_DEBUG_RECEIVE, "pushing flipq port %d (%3d "
1170 "chars): %d.%06d (%d/%d)\n", port->line,
1171 copied, (int)(tv.tv_sec % 60), (int)tv.tv_usec,
1172 tty->raw, tty->real_raw);
1173
1174 /* Tell the rest of the system the news. Great news. New
1175 characters! */
1176 tty_flip_buffer_push(tty);
1177 /* tty_schedule_flip (tty); */
1178 }
1179
1180 func_exit();
1181 }
1182
1183 /* Inlined: it is called only once. Remove the inline if you add another
1184 call */
1185 static inline void sx_check_modem_signals(struct sx_port *port)
1186 {
1187 int hi_state;
1188 int c_dcd;
1189
1190 hi_state = sx_read_channel_byte(port, hi_state);
1191 sx_dprintk(SX_DEBUG_MODEMSIGNALS, "Checking modem signals (%d/%d)\n",
1192 port->c_dcd, tty_port_carrier_raised(&port->gs.port));
1193
1194 if (hi_state & ST_BREAK) {
1195 hi_state &= ~ST_BREAK;
1196 sx_dprintk(SX_DEBUG_MODEMSIGNALS, "got a break.\n");
1197 sx_write_channel_byte(port, hi_state, hi_state);
1198 gs_got_break(&port->gs);
1199 }
1200 if (hi_state & ST_DCD) {
1201 hi_state &= ~ST_DCD;
1202 sx_dprintk(SX_DEBUG_MODEMSIGNALS, "got a DCD change.\n");
1203 sx_write_channel_byte(port, hi_state, hi_state);
1204 c_dcd = tty_port_carrier_raised(&port->gs.port);
1205 sx_dprintk(SX_DEBUG_MODEMSIGNALS, "DCD is now %d\n", c_dcd);
1206 if (c_dcd != port->c_dcd) {
1207 port->c_dcd = c_dcd;
1208 if (tty_port_carrier_raised(&port->gs.port)) {
1209 /* DCD went UP */
1210 if ((sx_read_channel_byte(port, hi_hstat) !=
1211 HS_IDLE_CLOSED) &&
1212 !(port->gs.port.tty->termios->
1213 c_cflag & CLOCAL)) {
1214 /* Are we blocking in open? */
1215 sx_dprintk(SX_DEBUG_MODEMSIGNALS, "DCD "
1216 "active, unblocking open\n");
1217 wake_up_interruptible(&port->gs.port.
1218 open_wait);
1219 } else {
1220 sx_dprintk(SX_DEBUG_MODEMSIGNALS, "DCD "
1221 "raised. Ignoring.\n");
1222 }
1223 } else {
1224 /* DCD went down! */
1225 if (!(port->gs.port.tty->termios->c_cflag & CLOCAL)){
1226 sx_dprintk(SX_DEBUG_MODEMSIGNALS, "DCD "
1227 "dropped. hanging up....\n");
1228 tty_hangup(port->gs.port.tty);
1229 } else {
1230 sx_dprintk(SX_DEBUG_MODEMSIGNALS, "DCD "
1231 "dropped. ignoring.\n");
1232 }
1233 }
1234 } else {
1235 sx_dprintk(SX_DEBUG_MODEMSIGNALS, "Hmmm. card told us "
1236 "DCD changed, but it didn't.\n");
1237 }
1238 }
1239 }
1240
1241 /* This is what an interrupt routine should look like.
1242 * Small, elegant, clear.
1243 */
1244
1245 static irqreturn_t sx_interrupt(int irq, void *ptr)
1246 {
1247 struct sx_board *board = ptr;
1248 struct sx_port *port;
1249 int i;
1250
1251 func_enter();
1252 sx_dprintk(SX_DEBUG_FLOW, "sx: enter sx_interrupt (%d/%d)\n", irq,
1253 board->irq);
1254
1255 /* AAargh! The order in which to do these things is essential and
1256 not trivial.
1257
1258 - Rate limit goes before "recursive". Otherwise a series of
1259 recursive calls will hang the machine in the interrupt routine.
1260
1261 - hardware twiddling goes before "recursive". Otherwise when we
1262 poll the card, and a recursive interrupt happens, we won't
1263 ack the card, so it might keep on interrupting us. (especially
1264 level sensitive interrupt systems like PCI).
1265
1266 - Rate limit goes before hardware twiddling. Otherwise we won't
1267 catch a card that has gone bonkers.
1268
1269 - The "initialized" test goes after the hardware twiddling. Otherwise
1270 the card will stick us in the interrupt routine again.
1271
1272 - The initialized test goes before recursive.
1273 */
1274
1275 #ifdef IRQ_RATE_LIMIT
1276 /* Aaargh! I'm ashamed. This costs more lines-of-code than the
1277 actual interrupt routine!. (Well, used to when I wrote that
1278 comment) */
1279 {
1280 static int lastjif;
1281 static int nintr = 0;
1282
1283 if (lastjif == jiffies) {
1284 if (++nintr > IRQ_RATE_LIMIT) {
1285 free_irq(board->irq, board);
1286 printk(KERN_ERR "sx: Too many interrupts. "
1287 "Turning off interrupt %d.\n",
1288 board->irq);
1289 }
1290 } else {
1291 lastjif = jiffies;
1292 nintr = 0;
1293 }
1294 }
1295 #endif
1296
1297 if (board->irq == irq) {
1298 /* Tell the card we've noticed the interrupt. */
1299
1300 sx_write_board_word(board, cc_int_pending, 0);
1301 if (IS_SX_BOARD(board)) {
1302 write_sx_byte(board, SX_RESET_IRQ, 1);
1303 } else if (IS_EISA_BOARD(board)) {
1304 inb(board->eisa_base + 0xc03);
1305 write_sx_word(board, 8, 0);
1306 } else {
1307 write_sx_byte(board, SI2_ISA_INTCLEAR,
1308 SI2_ISA_INTCLEAR_CLEAR);
1309 write_sx_byte(board, SI2_ISA_INTCLEAR,
1310 SI2_ISA_INTCLEAR_SET);
1311 }
1312 }
1313
1314 if (!sx_initialized)
1315 return IRQ_HANDLED;
1316 if (!(board->flags & SX_BOARD_INITIALIZED))
1317 return IRQ_HANDLED;
1318
1319 if (test_and_set_bit(SX_BOARD_INTR_LOCK, &board->locks)) {
1320 printk(KERN_ERR "Recursive interrupt! (%d)\n", board->irq);
1321 return IRQ_HANDLED;
1322 }
1323
1324 for (i = 0; i < board->nports; i++) {
1325 port = &board->ports[i];
1326 if (port->gs.port.flags & GS_ACTIVE) {
1327 if (sx_read_channel_byte(port, hi_state)) {
1328 sx_dprintk(SX_DEBUG_INTERRUPTS, "Port %d: "
1329 "modem signal change?... \n",i);
1330 sx_check_modem_signals(port);
1331 }
1332 if (port->gs.xmit_cnt) {
1333 sx_transmit_chars(port);
1334 }
1335 if (!(port->gs.port.flags & SX_RX_THROTTLE)) {
1336 sx_receive_chars(port);
1337 }
1338 }
1339 }
1340
1341 clear_bit(SX_BOARD_INTR_LOCK, &board->locks);
1342
1343 sx_dprintk(SX_DEBUG_FLOW, "sx: exit sx_interrupt (%d/%d)\n", irq,
1344 board->irq);
1345 func_exit();
1346 return IRQ_HANDLED;
1347 }
1348
1349 static void sx_pollfunc(unsigned long data)
1350 {
1351 struct sx_board *board = (struct sx_board *)data;
1352
1353 func_enter();
1354
1355 sx_interrupt(0, board);
1356
1357 mod_timer(&board->timer, jiffies + sx_poll);
1358 func_exit();
1359 }
1360
1361 /* ********************************************************************** *
1362 * Here are the routines that actually *
1363 * interface with the generic_serial driver *
1364 * ********************************************************************** */
1365
1366 /* Ehhm. I don't know how to fiddle with interrupts on the SX card. --REW */
1367 /* Hmm. Ok I figured it out. You don't. */
1368
1369 static void sx_disable_tx_interrupts(void *ptr)
1370 {
1371 struct sx_port *port = ptr;
1372 func_enter2();
1373
1374 port->gs.port.flags &= ~GS_TX_INTEN;
1375
1376 func_exit();
1377 }
1378
1379 static void sx_enable_tx_interrupts(void *ptr)
1380 {
1381 struct sx_port *port = ptr;
1382 int data_in_buffer;
1383 func_enter2();
1384
1385 /* First transmit the characters that we're supposed to */
1386 sx_transmit_chars(port);
1387
1388 /* The sx card will never interrupt us if we don't fill the buffer
1389 past 25%. So we keep considering interrupts off if that's the case. */
1390 data_in_buffer = (sx_read_channel_byte(port, hi_txipos) -
1391 sx_read_channel_byte(port, hi_txopos)) & 0xff;
1392
1393 /* XXX Must be "HIGH_WATER" for SI card according to doc. */
1394 if (data_in_buffer < LOW_WATER)
1395 port->gs.port.flags &= ~GS_TX_INTEN;
1396
1397 func_exit();
1398 }
1399
1400 static void sx_disable_rx_interrupts(void *ptr)
1401 {
1402 /* struct sx_port *port = ptr; */
1403 func_enter();
1404
1405 func_exit();
1406 }
1407
1408 static void sx_enable_rx_interrupts(void *ptr)
1409 {
1410 /* struct sx_port *port = ptr; */
1411 func_enter();
1412
1413 func_exit();
1414 }
1415
1416 /* Jeez. Isn't this simple? */
1417 static int sx_carrier_raised(struct tty_port *port)
1418 {
1419 struct sx_port *sp = container_of(port, struct sx_port, gs.port);
1420 return ((sx_read_channel_byte(sp, hi_ip) & IP_DCD) != 0);
1421 }
1422
1423 /* Jeez. Isn't this simple? */
1424 static int sx_chars_in_buffer(void *ptr)
1425 {
1426 struct sx_port *port = ptr;
1427 func_enter2();
1428
1429 func_exit();
1430 return ((sx_read_channel_byte(port, hi_txipos) -
1431 sx_read_channel_byte(port, hi_txopos)) & 0xff);
1432 }
1433
1434 static void sx_shutdown_port(void *ptr)
1435 {
1436 struct sx_port *port = ptr;
1437
1438 func_enter();
1439
1440 port->gs.port.flags &= ~GS_ACTIVE;
1441 if (port->gs.port.tty && (port->gs.port.tty->termios->c_cflag & HUPCL)) {
1442 sx_setsignals(port, 0, 0);
1443 sx_reconfigure_port(port);
1444 }
1445
1446 func_exit();
1447 }
1448
1449 /* ********************************************************************** *
1450 * Here are the routines that actually *
1451 * interface with the rest of the system *
1452 * ********************************************************************** */
1453
1454 static int sx_open(struct tty_struct *tty, struct file *filp)
1455 {
1456 struct sx_port *port;
1457 int retval, line;
1458 unsigned long flags;
1459
1460 func_enter();
1461
1462 if (!sx_initialized) {
1463 return -EIO;
1464 }
1465
1466 line = tty->index;
1467 sx_dprintk(SX_DEBUG_OPEN, "%d: opening line %d. tty=%p ctty=%p, "
1468 "np=%d)\n", task_pid_nr(current), line, tty,
1469 current->signal->tty, sx_nports);
1470
1471 if ((line < 0) || (line >= SX_NPORTS) || (line >= sx_nports))
1472 return -ENODEV;
1473
1474 port = &sx_ports[line];
1475 port->c_dcd = 0; /* Make sure that the first interrupt doesn't detect a
1476 1 -> 0 transition. */
1477
1478 sx_dprintk(SX_DEBUG_OPEN, "port = %p c_dcd = %d\n", port, port->c_dcd);
1479
1480 spin_lock_irqsave(&port->gs.driver_lock, flags);
1481
1482 tty->driver_data = port;
1483 port->gs.port.tty = tty;
1484 port->gs.port.count++;
1485 spin_unlock_irqrestore(&port->gs.driver_lock, flags);
1486
1487 sx_dprintk(SX_DEBUG_OPEN, "starting port\n");
1488
1489 /*
1490 * Start up serial port
1491 */
1492 retval = gs_init_port(&port->gs);
1493 sx_dprintk(SX_DEBUG_OPEN, "done gs_init\n");
1494 if (retval) {
1495 port->gs.port.count--;
1496 return retval;
1497 }
1498
1499 port->gs.port.flags |= GS_ACTIVE;
1500 if (port->gs.port.count <= 1)
1501 sx_setsignals(port, 1, 1);
1502
1503 #if 0
1504 if (sx_debug & SX_DEBUG_OPEN)
1505 my_hd(port, sizeof(*port));
1506 #else
1507 if (sx_debug & SX_DEBUG_OPEN)
1508 my_hd_io(port->board->base + port->ch_base, sizeof(*port));
1509 #endif
1510
1511 if (port->gs.port.count <= 1) {
1512 if (sx_send_command(port, HS_LOPEN, -1, HS_IDLE_OPEN) != 1) {
1513 printk(KERN_ERR "sx: Card didn't respond to LOPEN "
1514 "command.\n");
1515 spin_lock_irqsave(&port->gs.driver_lock, flags);
1516 port->gs.port.count--;
1517 spin_unlock_irqrestore(&port->gs.driver_lock, flags);
1518 return -EIO;
1519 }
1520 }
1521
1522 retval = gs_block_til_ready(port, filp);
1523 sx_dprintk(SX_DEBUG_OPEN, "Block til ready returned %d. Count=%d\n",
1524 retval, port->gs.port.count);
1525
1526 if (retval) {
1527 /*
1528 * Don't lower gs.port.count here because sx_close() will be called later
1529 */
1530
1531 return retval;
1532 }
1533 /* tty->low_latency = 1; */
1534
1535 port->c_dcd = sx_carrier_raised(&port->gs.port);
1536 sx_dprintk(SX_DEBUG_OPEN, "at open: cd=%d\n", port->c_dcd);
1537
1538 func_exit();
1539 return 0;
1540
1541 }
1542
1543 static void sx_close(void *ptr)
1544 {
1545 struct sx_port *port = ptr;
1546 /* Give the port 5 seconds to close down. */
1547 int to = 5 * HZ;
1548
1549 func_enter();
1550
1551 sx_setsignals(port, 0, 0);
1552 sx_reconfigure_port(port);
1553 sx_send_command(port, HS_CLOSE, 0, 0);
1554
1555 while (to-- && (sx_read_channel_byte(port, hi_hstat) != HS_IDLE_CLOSED))
1556 if (msleep_interruptible(10))
1557 break;
1558 if (sx_read_channel_byte(port, hi_hstat) != HS_IDLE_CLOSED) {
1559 if (sx_send_command(port, HS_FORCE_CLOSED, -1, HS_IDLE_CLOSED)
1560 != 1) {
1561 printk(KERN_ERR "sx: sent the force_close command, but "
1562 "card didn't react\n");
1563 } else
1564 sx_dprintk(SX_DEBUG_CLOSE, "sent the force_close "
1565 "command.\n");
1566 }
1567
1568 sx_dprintk(SX_DEBUG_CLOSE, "waited %d jiffies for close. count=%d\n",
1569 5 * HZ - to - 1, port->gs.port.count);
1570
1571 if (port->gs.port.count) {
1572 sx_dprintk(SX_DEBUG_CLOSE, "WARNING port count:%d\n",
1573 port->gs.port.count);
1574 /*printk("%s SETTING port count to zero: %p count: %d\n",
1575 __func__, port, port->gs.port.count);
1576 port->gs.port.count = 0;*/
1577 }
1578
1579 func_exit();
1580 }
1581
1582 /* This is relatively thorough. But then again it is only 20 lines. */
1583 #define MARCHUP for (i = min; i < max; i++)
1584 #define MARCHDOWN for (i = max - 1; i >= min; i--)
1585 #define W0 write_sx_byte(board, i, 0x55)
1586 #define W1 write_sx_byte(board, i, 0xaa)
1587 #define R0 if (read_sx_byte(board, i) != 0x55) return 1
1588 #define R1 if (read_sx_byte(board, i) != 0xaa) return 1
1589
1590 /* This memtest takes a human-noticable time. You normally only do it
1591 once a boot, so I guess that it is worth it. */
1592 static int do_memtest(struct sx_board *board, int min, int max)
1593 {
1594 int i;
1595
1596 /* This is a marchb. Theoretically, marchb catches much more than
1597 simpler tests. In practise, the longer test just catches more
1598 intermittent errors. -- REW
1599 (For the theory behind memory testing see:
1600 Testing Semiconductor Memories by A.J. van de Goor.) */
1601 MARCHUP {
1602 W0;
1603 }
1604 MARCHUP {
1605 R0;
1606 W1;
1607 R1;
1608 W0;
1609 R0;
1610 W1;
1611 }
1612 MARCHUP {
1613 R1;
1614 W0;
1615 W1;
1616 }
1617 MARCHDOWN {
1618 R1;
1619 W0;
1620 W1;
1621 W0;
1622 }
1623 MARCHDOWN {
1624 R0;
1625 W1;
1626 W0;
1627 }
1628
1629 return 0;
1630 }
1631
1632 #undef MARCHUP
1633 #undef MARCHDOWN
1634 #undef W0
1635 #undef W1
1636 #undef R0
1637 #undef R1
1638
1639 #define MARCHUP for (i = min; i < max; i += 2)
1640 #define MARCHDOWN for (i = max - 1; i >= min; i -= 2)
1641 #define W0 write_sx_word(board, i, 0x55aa)
1642 #define W1 write_sx_word(board, i, 0xaa55)
1643 #define R0 if (read_sx_word(board, i) != 0x55aa) return 1
1644 #define R1 if (read_sx_word(board, i) != 0xaa55) return 1
1645
1646 #if 0
1647 /* This memtest takes a human-noticable time. You normally only do it
1648 once a boot, so I guess that it is worth it. */
1649 static int do_memtest_w(struct sx_board *board, int min, int max)
1650 {
1651 int i;
1652
1653 MARCHUP {
1654 W0;
1655 }
1656 MARCHUP {
1657 R0;
1658 W1;
1659 R1;
1660 W0;
1661 R0;
1662 W1;
1663 }
1664 MARCHUP {
1665 R1;
1666 W0;
1667 W1;
1668 }
1669 MARCHDOWN {
1670 R1;
1671 W0;
1672 W1;
1673 W0;
1674 }
1675 MARCHDOWN {
1676 R0;
1677 W1;
1678 W0;
1679 }
1680
1681 return 0;
1682 }
1683 #endif
1684
1685 static long sx_fw_ioctl(struct file *filp, unsigned int cmd,
1686 unsigned long arg)
1687 {
1688 long rc = 0;
1689 int __user *descr = (int __user *)arg;
1690 int i;
1691 static struct sx_board *board = NULL;
1692 int nbytes, offset;
1693 unsigned long data;
1694 char *tmp;
1695
1696 func_enter();
1697
1698 if (!capable(CAP_SYS_RAWIO))
1699 return -EPERM;
1700
1701 lock_kernel();
1702
1703 sx_dprintk(SX_DEBUG_FIRMWARE, "IOCTL %x: %lx\n", cmd, arg);
1704
1705 if (!board)
1706 board = &boards[0];
1707 if (board->flags & SX_BOARD_PRESENT) {
1708 sx_dprintk(SX_DEBUG_FIRMWARE, "Board present! (%x)\n",
1709 board->flags);
1710 } else {
1711 sx_dprintk(SX_DEBUG_FIRMWARE, "Board not present! (%x) all:",
1712 board->flags);
1713 for (i = 0; i < SX_NBOARDS; i++)
1714 sx_dprintk(SX_DEBUG_FIRMWARE, "<%x> ", boards[i].flags);
1715 sx_dprintk(SX_DEBUG_FIRMWARE, "\n");
1716 rc = -EIO;
1717 goto out;
1718 }
1719
1720 switch (cmd) {
1721 case SXIO_SET_BOARD:
1722 sx_dprintk(SX_DEBUG_FIRMWARE, "set board to %ld\n", arg);
1723 rc = -EIO;
1724 if (arg >= SX_NBOARDS)
1725 break;
1726 sx_dprintk(SX_DEBUG_FIRMWARE, "not out of range\n");
1727 if (!(boards[arg].flags & SX_BOARD_PRESENT))
1728 break;
1729 sx_dprintk(SX_DEBUG_FIRMWARE, ".. and present!\n");
1730 board = &boards[arg];
1731 rc = 0;
1732 /* FIXME: And this does ... nothing?? */
1733 break;
1734 case SXIO_GET_TYPE:
1735 rc = -ENOENT; /* If we manage to miss one, return error. */
1736 if (IS_SX_BOARD(board))
1737 rc = SX_TYPE_SX;
1738 if (IS_CF_BOARD(board))
1739 rc = SX_TYPE_CF;
1740 if (IS_SI_BOARD(board))
1741 rc = SX_TYPE_SI;
1742 if (IS_SI1_BOARD(board))
1743 rc = SX_TYPE_SI;
1744 if (IS_EISA_BOARD(board))
1745 rc = SX_TYPE_SI;
1746 sx_dprintk(SX_DEBUG_FIRMWARE, "returning type= %ld\n", rc);
1747 break;
1748 case SXIO_DO_RAMTEST:
1749 if (sx_initialized) { /* Already initialized: better not ramtest the board. */
1750 rc = -EPERM;
1751 break;
1752 }
1753 if (IS_SX_BOARD(board)) {
1754 rc = do_memtest(board, 0, 0x7000);
1755 if (!rc)
1756 rc = do_memtest(board, 0, 0x7000);
1757 /*if (!rc) rc = do_memtest_w (board, 0, 0x7000); */
1758 } else {
1759 rc = do_memtest(board, 0, 0x7ff8);
1760 /* if (!rc) rc = do_memtest_w (board, 0, 0x7ff8); */
1761 }
1762 sx_dprintk(SX_DEBUG_FIRMWARE,
1763 "returning memtest result= %ld\n", rc);
1764 break;
1765 case SXIO_DOWNLOAD:
1766 if (sx_initialized) {/* Already initialized */
1767 rc = -EEXIST;
1768 break;
1769 }
1770 if (!sx_reset(board)) {
1771 rc = -EIO;
1772 break;
1773 }
1774 sx_dprintk(SX_DEBUG_INIT, "reset the board...\n");
1775
1776 tmp = kmalloc(SX_CHUNK_SIZE, GFP_USER);
1777 if (!tmp) {
1778 rc = -ENOMEM;
1779 break;
1780 }
1781 /* FIXME: check returns */
1782 get_user(nbytes, descr++);
1783 get_user(offset, descr++);
1784 get_user(data, descr++);
1785 while (nbytes && data) {
1786 for (i = 0; i < nbytes; i += SX_CHUNK_SIZE) {
1787 if (copy_from_user(tmp, (char __user *)data + i,
1788 (i + SX_CHUNK_SIZE > nbytes) ?
1789 nbytes - i : SX_CHUNK_SIZE)) {
1790 kfree(tmp);
1791 rc = -EFAULT;
1792 goto out;
1793 }
1794 memcpy_toio(board->base2 + offset + i, tmp,
1795 (i + SX_CHUNK_SIZE > nbytes) ?
1796 nbytes - i : SX_CHUNK_SIZE);
1797 }
1798
1799 get_user(nbytes, descr++);
1800 get_user(offset, descr++);
1801 get_user(data, descr++);
1802 }
1803 kfree(tmp);
1804 sx_nports += sx_init_board(board);
1805 rc = sx_nports;
1806 break;
1807 case SXIO_INIT:
1808 if (sx_initialized) { /* Already initialized */
1809 rc = -EEXIST;
1810 break;
1811 }
1812 /* This is not allowed until all boards are initialized... */
1813 for (i = 0; i < SX_NBOARDS; i++) {
1814 if ((boards[i].flags & SX_BOARD_PRESENT) &&
1815 !(boards[i].flags & SX_BOARD_INITIALIZED)) {
1816 rc = -EIO;
1817 break;
1818 }
1819 }
1820 for (i = 0; i < SX_NBOARDS; i++)
1821 if (!(boards[i].flags & SX_BOARD_PRESENT))
1822 break;
1823
1824 sx_dprintk(SX_DEBUG_FIRMWARE, "initing portstructs, %d boards, "
1825 "%d channels, first board: %d ports\n",
1826 i, sx_nports, boards[0].nports);
1827 rc = sx_init_portstructs(i, sx_nports);
1828 sx_init_drivers();
1829 if (rc >= 0)
1830 sx_initialized++;
1831 break;
1832 case SXIO_SETDEBUG:
1833 sx_debug = arg;
1834 break;
1835 case SXIO_GETDEBUG:
1836 rc = sx_debug;
1837 break;
1838 case SXIO_GETGSDEBUG:
1839 case SXIO_SETGSDEBUG:
1840 rc = -EINVAL;
1841 break;
1842 case SXIO_GETNPORTS:
1843 rc = sx_nports;
1844 break;
1845 default:
1846 rc = -ENOTTY;
1847 break;
1848 }
1849 out:
1850 unlock_kernel();
1851 func_exit();
1852 return rc;
1853 }
1854
1855 static int sx_break(struct tty_struct *tty, int flag)
1856 {
1857 struct sx_port *port = tty->driver_data;
1858 int rv;
1859
1860 func_enter();
1861 lock_kernel();
1862
1863 if (flag)
1864 rv = sx_send_command(port, HS_START, -1, HS_IDLE_BREAK);
1865 else
1866 rv = sx_send_command(port, HS_STOP, -1, HS_IDLE_OPEN);
1867 if (rv != 1)
1868 printk(KERN_ERR "sx: couldn't send break (%x).\n",
1869 read_sx_byte(port->board, CHAN_OFFSET(port, hi_hstat)));
1870 unlock_kernel();
1871 func_exit();
1872 return 0;
1873 }
1874
1875 static int sx_tiocmget(struct tty_struct *tty, struct file *file)
1876 {
1877 struct sx_port *port = tty->driver_data;
1878 return sx_getsignals(port);
1879 }
1880
1881 static int sx_tiocmset(struct tty_struct *tty, struct file *file,
1882 unsigned int set, unsigned int clear)
1883 {
1884 struct sx_port *port = tty->driver_data;
1885 int rts = -1, dtr = -1;
1886
1887 if (set & TIOCM_RTS)
1888 rts = 1;
1889 if (set & TIOCM_DTR)
1890 dtr = 1;
1891 if (clear & TIOCM_RTS)
1892 rts = 0;
1893 if (clear & TIOCM_DTR)
1894 dtr = 0;
1895
1896 sx_setsignals(port, dtr, rts);
1897 sx_reconfigure_port(port);
1898 return 0;
1899 }
1900
1901 static int sx_ioctl(struct tty_struct *tty, struct file *filp,
1902 unsigned int cmd, unsigned long arg)
1903 {
1904 int rc;
1905 struct sx_port *port = tty->driver_data;
1906 void __user *argp = (void __user *)arg;
1907
1908 /* func_enter2(); */
1909
1910 rc = 0;
1911 lock_kernel();
1912 switch (cmd) {
1913 case TIOCGSERIAL:
1914 rc = gs_getserial(&port->gs, argp);
1915 break;
1916 case TIOCSSERIAL:
1917 rc = gs_setserial(&port->gs, argp);
1918 break;
1919 default:
1920 rc = -ENOIOCTLCMD;
1921 break;
1922 }
1923 unlock_kernel();
1924
1925 /* func_exit(); */
1926 return rc;
1927 }
1928
1929 /* The throttle/unthrottle scheme for the Specialix card is different
1930 * from other drivers and deserves some explanation.
1931 * The Specialix hardware takes care of XON/XOFF
1932 * and CTS/RTS flow control itself. This means that all we have to
1933 * do when signalled by the upper tty layer to throttle/unthrottle is
1934 * to make a note of it here. When we come to read characters from the
1935 * rx buffers on the card (sx_receive_chars()) we look to see if the
1936 * upper layer can accept more (as noted here in sx_rx_throt[]).
1937 * If it can't we simply don't remove chars from the cards buffer.
1938 * When the tty layer can accept chars, we again note that here and when
1939 * sx_receive_chars() is called it will remove them from the cards buffer.
1940 * The card will notice that a ports buffer has drained below some low
1941 * water mark and will unflow control the line itself, using whatever
1942 * flow control scheme is in use for that port. -- Simon Allen
1943 */
1944
1945 static void sx_throttle(struct tty_struct *tty)
1946 {
1947 struct sx_port *port = tty->driver_data;
1948
1949 func_enter2();
1950 /* If the port is using any type of input flow
1951 * control then throttle the port.
1952 */
1953 if ((tty->termios->c_cflag & CRTSCTS) || (I_IXOFF(tty))) {
1954 port->gs.port.flags |= SX_RX_THROTTLE;
1955 }
1956 func_exit();
1957 }
1958
1959 static void sx_unthrottle(struct tty_struct *tty)
1960 {
1961 struct sx_port *port = tty->driver_data;
1962
1963 func_enter2();
1964 /* Always unthrottle even if flow control is not enabled on
1965 * this port in case we disabled flow control while the port
1966 * was throttled
1967 */
1968 port->gs.port.flags &= ~SX_RX_THROTTLE;
1969 func_exit();
1970 return;
1971 }
1972
1973 /* ********************************************************************** *
1974 * Here are the initialization routines. *
1975 * ********************************************************************** */
1976
1977 static int sx_init_board(struct sx_board *board)
1978 {
1979 int addr;
1980 int chans;
1981 int type;
1982
1983 func_enter();
1984
1985 /* This is preceded by downloading the download code. */
1986
1987 board->flags |= SX_BOARD_INITIALIZED;
1988
1989 if (read_sx_byte(board, 0))
1990 /* CF boards may need this. */
1991 write_sx_byte(board, 0, 0);
1992
1993 /* This resets the processor again, to make sure it didn't do any
1994 foolish things while we were downloading the image */
1995 if (!sx_reset(board))
1996 return 0;
1997
1998 sx_start_board(board);
1999 udelay(10);
2000 if (!sx_busy_wait_neq(board, 0, 0xff, 0)) {
2001 printk(KERN_ERR "sx: Ooops. Board won't initialize.\n");
2002 return 0;
2003 }
2004
2005 /* Ok. So now the processor on the card is running. It gathered
2006 some info for us... */
2007 sx_dprintk(SX_DEBUG_INIT, "The sxcard structure:\n");
2008 if (sx_debug & SX_DEBUG_INIT)
2009 my_hd_io(board->base, 0x10);
2010 sx_dprintk(SX_DEBUG_INIT, "the first sx_module structure:\n");
2011 if (sx_debug & SX_DEBUG_INIT)
2012 my_hd_io(board->base + 0x80, 0x30);
2013
2014 sx_dprintk(SX_DEBUG_INIT, "init_status: %x, %dk memory, firmware "
2015 "V%x.%02x,\n",
2016 read_sx_byte(board, 0), read_sx_byte(board, 1),
2017 read_sx_byte(board, 5), read_sx_byte(board, 4));
2018
2019 if (read_sx_byte(board, 0) == 0xff) {
2020 printk(KERN_INFO "sx: No modules found. Sorry.\n");
2021 board->nports = 0;
2022 return 0;
2023 }
2024
2025 chans = 0;
2026
2027 if (IS_SX_BOARD(board)) {
2028 sx_write_board_word(board, cc_int_count, sx_maxints);
2029 } else {
2030 if (sx_maxints)
2031 sx_write_board_word(board, cc_int_count,
2032 SI_PROCESSOR_CLOCK / 8 / sx_maxints);
2033 }
2034
2035 /* grab the first module type... */
2036 /* board->ta_type = mod_compat_type (read_sx_byte (board, 0x80 + 0x08)); */
2037 board->ta_type = mod_compat_type(sx_read_module_byte(board, 0x80,
2038 mc_chip));
2039
2040 /* XXX byteorder */
2041 for (addr = 0x80; addr != 0; addr = read_sx_word(board, addr) & 0x7fff){
2042 type = sx_read_module_byte(board, addr, mc_chip);
2043 sx_dprintk(SX_DEBUG_INIT, "Module at %x: %d channels\n",
2044 addr, read_sx_byte(board, addr + 2));
2045
2046 chans += sx_read_module_byte(board, addr, mc_type);
2047
2048 sx_dprintk(SX_DEBUG_INIT, "module is an %s, which has %s/%s "
2049 "panels\n",
2050 mod_type_s(type),
2051 pan_type_s(sx_read_module_byte(board, addr,
2052 mc_mods) & 0xf),
2053 pan_type_s(sx_read_module_byte(board, addr,
2054 mc_mods) >> 4));
2055
2056 sx_dprintk(SX_DEBUG_INIT, "CD1400 versions: %x/%x, ASIC "
2057 "version: %x\n",
2058 sx_read_module_byte(board, addr, mc_rev1),
2059 sx_read_module_byte(board, addr, mc_rev2),
2060 sx_read_module_byte(board, addr, mc_mtaasic_rev));
2061
2062 /* The following combinations are illegal: It should theoretically
2063 work, but timing problems make the bus HANG. */
2064
2065 if (mod_compat_type(type) != board->ta_type) {
2066 printk(KERN_ERR "sx: This is an invalid "
2067 "configuration.\nDon't mix TA/MTA/SXDC on the "
2068 "same hostadapter.\n");
2069 chans = 0;
2070 break;
2071 }
2072 if ((IS_EISA_BOARD(board) ||
2073 IS_SI_BOARD(board)) &&
2074 (mod_compat_type(type) == 4)) {
2075 printk(KERN_ERR "sx: This is an invalid "
2076 "configuration.\nDon't use SXDCs on an SI/XIO "
2077 "adapter.\n");
2078 chans = 0;
2079 break;
2080 }
2081 #if 0 /* Problem fixed: firmware 3.05 */
2082 if (IS_SX_BOARD(board) && (type == TA8)) {
2083 /* There are some issues with the firmware and the DCD/RTS
2084 lines. It might work if you tie them together or something.
2085 It might also work if you get a newer sx_firmware. Therefore
2086 this is just a warning. */
2087 printk(KERN_WARNING
2088 "sx: The SX host doesn't work too well "
2089 "with the TA8 adapters.\nSpecialix is working on it.\n");
2090 }
2091 #endif
2092 }
2093
2094 if (chans) {
2095 if (board->irq > 0) {
2096 /* fixed irq, probably PCI */
2097 if (sx_irqmask & (1 << board->irq)) { /* may we use this irq? */
2098 if (request_irq(board->irq, sx_interrupt,
2099 IRQF_SHARED | IRQF_DISABLED,
2100 "sx", board)) {
2101 printk(KERN_ERR "sx: Cannot allocate "
2102 "irq %d.\n", board->irq);
2103 board->irq = 0;
2104 }
2105 } else
2106 board->irq = 0;
2107 } else if (board->irq < 0 && sx_irqmask) {
2108 /* auto-allocate irq */
2109 int irqnr;
2110 int irqmask = sx_irqmask & (IS_SX_BOARD(board) ?
2111 SX_ISA_IRQ_MASK : SI2_ISA_IRQ_MASK);
2112 for (irqnr = 15; irqnr > 0; irqnr--)
2113 if (irqmask & (1 << irqnr))
2114 if (!request_irq(irqnr, sx_interrupt,
2115 IRQF_SHARED | IRQF_DISABLED,
2116 "sx", board))
2117 break;
2118 if (!irqnr)
2119 printk(KERN_ERR "sx: Cannot allocate IRQ.\n");
2120 board->irq = irqnr;
2121 } else
2122 board->irq = 0;
2123
2124 if (board->irq) {
2125 /* Found a valid interrupt, start up interrupts! */
2126 sx_dprintk(SX_DEBUG_INIT, "Using irq %d.\n",
2127 board->irq);
2128 sx_start_interrupts(board);
2129 board->poll = sx_slowpoll;
2130 board->flags |= SX_IRQ_ALLOCATED;
2131 } else {
2132 /* no irq: setup board for polled operation */
2133 board->poll = sx_poll;
2134 sx_dprintk(SX_DEBUG_INIT, "Using poll-interval %d.\n",
2135 board->poll);
2136 }
2137
2138 /* The timer should be initialized anyway: That way we can
2139 safely del_timer it when the module is unloaded. */
2140 setup_timer(&board->timer, sx_pollfunc, (unsigned long)board);
2141
2142 if (board->poll)
2143 mod_timer(&board->timer, jiffies + board->poll);
2144 } else {
2145 board->irq = 0;
2146 }
2147
2148 board->nports = chans;
2149 sx_dprintk(SX_DEBUG_INIT, "returning %d ports.", board->nports);
2150
2151 func_exit();
2152 return chans;
2153 }
2154
2155 static void __devinit printheader(void)
2156 {
2157 static int header_printed;
2158
2159 if (!header_printed) {
2160 printk(KERN_INFO "Specialix SX driver "
2161 "(C) 1998/1999 R.E.Wolff@BitWizard.nl\n");
2162 printk(KERN_INFO "sx: version " __stringify(SX_VERSION) "\n");
2163 header_printed = 1;
2164 }
2165 }
2166
2167 static int __devinit probe_sx(struct sx_board *board)
2168 {
2169 struct vpd_prom vpdp;
2170 char *p;
2171 int i;
2172
2173 func_enter();
2174
2175 if (!IS_CF_BOARD(board)) {
2176 sx_dprintk(SX_DEBUG_PROBE, "Going to verify vpd prom at %p.\n",
2177 board->base + SX_VPD_ROM);
2178
2179 if (sx_debug & SX_DEBUG_PROBE)
2180 my_hd_io(board->base + SX_VPD_ROM, 0x40);
2181
2182 p = (char *)&vpdp;
2183 for (i = 0; i < sizeof(struct vpd_prom); i++)
2184 *p++ = read_sx_byte(board, SX_VPD_ROM + i * 2);
2185
2186 if (sx_debug & SX_DEBUG_PROBE)
2187 my_hd(&vpdp, 0x20);
2188
2189 sx_dprintk(SX_DEBUG_PROBE, "checking identifier...\n");
2190
2191 if (strncmp(vpdp.identifier, SX_VPD_IDENT_STRING, 16) != 0) {
2192 sx_dprintk(SX_DEBUG_PROBE, "Got non-SX identifier: "
2193 "'%s'\n", vpdp.identifier);
2194 return 0;
2195 }
2196 }
2197
2198 printheader();
2199
2200 if (!IS_CF_BOARD(board)) {
2201 printk(KERN_DEBUG "sx: Found an SX board at %lx\n",
2202 board->hw_base);
2203 printk(KERN_DEBUG "sx: hw_rev: %d, assembly level: %d, "
2204 "uniq ID:%08x, ",
2205 vpdp.hwrev, vpdp.hwass, vpdp.uniqid);
2206 printk("Manufactured: %d/%d\n", 1970 + vpdp.myear, vpdp.mweek);
2207
2208 if ((((vpdp.uniqid >> 24) & SX_UNIQUEID_MASK) !=
2209 SX_PCI_UNIQUEID1) && (((vpdp.uniqid >> 24) &
2210 SX_UNIQUEID_MASK) != SX_ISA_UNIQUEID1)) {
2211 /* This might be a bit harsh. This was the primary
2212 reason the SX/ISA card didn't work at first... */
2213 printk(KERN_ERR "sx: Hmm. Not an SX/PCI or SX/ISA "
2214 "card. Sorry: giving up.\n");
2215 return (0);
2216 }
2217
2218 if (((vpdp.uniqid >> 24) & SX_UNIQUEID_MASK) ==
2219 SX_ISA_UNIQUEID1) {
2220 if (((unsigned long)board->hw_base) & 0x8000) {
2221 printk(KERN_WARNING "sx: Warning: There may be "
2222 "hardware problems with the card at "
2223 "%lx.\n", board->hw_base);
2224 printk(KERN_WARNING "sx: Read sx.txt for more "
2225 "info.\n");
2226 }
2227 }
2228 }
2229
2230 board->nports = -1;
2231
2232 /* This resets the processor, and keeps it off the bus. */
2233 if (!sx_reset(board))
2234 return 0;
2235 sx_dprintk(SX_DEBUG_INIT, "reset the board...\n");
2236
2237 func_exit();
2238 return 1;
2239 }
2240
2241 #if defined(CONFIG_ISA) || defined(CONFIG_EISA)
2242
2243 /* Specialix probes for this card at 32k increments from 640k to 16M.
2244 I consider machines with less than 16M unlikely nowadays, so I'm
2245 not probing above 1Mb. Also, 0xa0000, 0xb0000, are taken by the VGA
2246 card. 0xe0000 and 0xf0000 are taken by the BIOS. That only leaves
2247 0xc0000, 0xc8000, 0xd0000 and 0xd8000 . */
2248
2249 static int __devinit probe_si(struct sx_board *board)
2250 {
2251 int i;
2252
2253 func_enter();
2254 sx_dprintk(SX_DEBUG_PROBE, "Going to verify SI signature hw %lx at "
2255 "%p.\n", board->hw_base, board->base + SI2_ISA_ID_BASE);
2256
2257 if (sx_debug & SX_DEBUG_PROBE)
2258 my_hd_io(board->base + SI2_ISA_ID_BASE, 0x8);
2259
2260 if (!IS_EISA_BOARD(board)) {
2261 if (IS_SI1_BOARD(board)) {
2262 for (i = 0; i < 8; i++) {
2263 write_sx_byte(board, SI2_ISA_ID_BASE + 7 - i,i);
2264 }
2265 }
2266 for (i = 0; i < 8; i++) {
2267 if ((read_sx_byte(board, SI2_ISA_ID_BASE + 7 - i) & 7)
2268 != i) {
2269 func_exit();
2270 return 0;
2271 }
2272 }
2273 }
2274
2275 /* Now we're pretty much convinced that there is an SI board here,
2276 but to prevent trouble, we'd better double check that we don't
2277 have an SI1 board when we're probing for an SI2 board.... */
2278
2279 write_sx_byte(board, SI2_ISA_ID_BASE, 0x10);
2280 if (IS_SI1_BOARD(board)) {
2281 /* This should be an SI1 board, which has this
2282 location writable... */
2283 if (read_sx_byte(board, SI2_ISA_ID_BASE) != 0x10) {
2284 func_exit();
2285 return 0;
2286 }
2287 } else {
2288 /* This should be an SI2 board, which has the bottom
2289 3 bits non-writable... */
2290 if (read_sx_byte(board, SI2_ISA_ID_BASE) == 0x10) {
2291 func_exit();
2292 return 0;
2293 }
2294 }
2295
2296 /* Now we're pretty much convinced that there is an SI board here,
2297 but to prevent trouble, we'd better double check that we don't
2298 have an SI1 board when we're probing for an SI2 board.... */
2299
2300 write_sx_byte(board, SI2_ISA_ID_BASE, 0x10);
2301 if (IS_SI1_BOARD(board)) {
2302 /* This should be an SI1 board, which has this
2303 location writable... */
2304 if (read_sx_byte(board, SI2_ISA_ID_BASE) != 0x10) {
2305 func_exit();
2306 return 0;
2307 }
2308 } else {
2309 /* This should be an SI2 board, which has the bottom
2310 3 bits non-writable... */
2311 if (read_sx_byte(board, SI2_ISA_ID_BASE) == 0x10) {
2312 func_exit();
2313 return 0;
2314 }
2315 }
2316
2317 printheader();
2318
2319 printk(KERN_DEBUG "sx: Found an SI board at %lx\n", board->hw_base);
2320 /* Compared to the SX boards, it is a complete guess as to what
2321 this card is up to... */
2322
2323 board->nports = -1;
2324
2325 /* This resets the processor, and keeps it off the bus. */
2326 if (!sx_reset(board))
2327 return 0;
2328 sx_dprintk(SX_DEBUG_INIT, "reset the board...\n");
2329
2330 func_exit();
2331 return 1;
2332 }
2333 #endif
2334
2335 static const struct tty_operations sx_ops = {
2336 .break_ctl = sx_break,
2337 .open = sx_open,
2338 .close = gs_close,
2339 .write = gs_write,
2340 .put_char = gs_put_char,
2341 .flush_chars = gs_flush_chars,
2342 .write_room = gs_write_room,
2343 .chars_in_buffer = gs_chars_in_buffer,
2344 .flush_buffer = gs_flush_buffer,
2345 .ioctl = sx_ioctl,
2346 .throttle = sx_throttle,
2347 .unthrottle = sx_unthrottle,
2348 .set_termios = gs_set_termios,
2349 .stop = gs_stop,
2350 .start = gs_start,
2351 .hangup = gs_hangup,
2352 .tiocmget = sx_tiocmget,
2353 .tiocmset = sx_tiocmset,
2354 };
2355
2356 static const struct tty_port_operations sx_port_ops = {
2357 .carrier_raised = sx_carrier_raised,
2358 };
2359
2360 static int sx_init_drivers(void)
2361 {
2362 int error;
2363
2364 func_enter();
2365
2366 sx_driver = alloc_tty_driver(sx_nports);
2367 if (!sx_driver)
2368 return 1;
2369 sx_driver->owner = THIS_MODULE;
2370 sx_driver->driver_name = "specialix_sx";
2371 sx_driver->name = "ttyX";
2372 sx_driver->major = SX_NORMAL_MAJOR;
2373 sx_driver->type = TTY_DRIVER_TYPE_SERIAL;
2374 sx_driver->subtype = SERIAL_TYPE_NORMAL;
2375 sx_driver->init_termios = tty_std_termios;
2376 sx_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
2377 sx_driver->init_termios.c_ispeed = 9600;
2378 sx_driver->init_termios.c_ospeed = 9600;
2379 sx_driver->flags = TTY_DRIVER_REAL_RAW;
2380 tty_set_operations(sx_driver, &sx_ops);
2381
2382 if ((error = tty_register_driver(sx_driver))) {
2383 put_tty_driver(sx_driver);
2384 printk(KERN_ERR "sx: Couldn't register sx driver, error = %d\n",
2385 error);
2386 return 1;
2387 }
2388 func_exit();
2389 return 0;
2390 }
2391
2392 static int sx_init_portstructs(int nboards, int nports)
2393 {
2394 struct sx_board *board;
2395 struct sx_port *port;
2396 int i, j;
2397 int addr, chans;
2398 int portno;
2399
2400 func_enter();
2401
2402 /* Many drivers statically allocate the maximum number of ports
2403 There is no reason not to allocate them dynamically.
2404 Is there? -- REW */
2405 sx_ports = kcalloc(nports, sizeof(struct sx_port), GFP_KERNEL);
2406 if (!sx_ports)
2407 return -ENOMEM;
2408
2409 port = sx_ports;
2410 for (i = 0; i < nboards; i++) {
2411 board = &boards[i];
2412 board->ports = port;
2413 for (j = 0; j < boards[i].nports; j++) {
2414 sx_dprintk(SX_DEBUG_INIT, "initing port %d\n", j);
2415 tty_port_init(&port->gs.port);
2416 port->gs.port.ops = &sx_port_ops;
2417 port->gs.magic = SX_MAGIC;
2418 port->gs.close_delay = HZ / 2;
2419 port->gs.closing_wait = 30 * HZ;
2420 port->board = board;
2421 port->gs.rd = &sx_real_driver;
2422 #ifdef NEW_WRITE_LOCKING
2423 port->gs.port_write_mutex = MUTEX;
2424 #endif
2425 spin_lock_init(&port->gs.driver_lock);
2426 /*
2427 * Initializing wait queue
2428 */
2429 port++;
2430 }
2431 }
2432
2433 port = sx_ports;
2434 portno = 0;
2435 for (i = 0; i < nboards; i++) {
2436 board = &boards[i];
2437 board->port_base = portno;
2438 /* Possibly the configuration was rejected. */
2439 sx_dprintk(SX_DEBUG_PROBE, "Board has %d channels\n",
2440 board->nports);
2441 if (board->nports <= 0)
2442 continue;
2443 /* XXX byteorder ?? */
2444 for (addr = 0x80; addr != 0;
2445 addr = read_sx_word(board, addr) & 0x7fff) {
2446 chans = sx_read_module_byte(board, addr, mc_type);
2447 sx_dprintk(SX_DEBUG_PROBE, "Module at %x: %d "
2448 "channels\n", addr, chans);
2449 sx_dprintk(SX_DEBUG_PROBE, "Port at");
2450 for (j = 0; j < chans; j++) {
2451 /* The "sx-way" is the way it SHOULD be done.
2452 That way in the future, the firmware may for
2453 example pack the structures a bit more
2454 efficient. Neil tells me it isn't going to
2455 happen anytime soon though. */
2456 if (IS_SX_BOARD(board))
2457 port->ch_base = sx_read_module_word(
2458 board, addr + j * 2,
2459 mc_chan_pointer);
2460 else
2461 port->ch_base = addr + 0x100 + 0x300 *j;
2462
2463 sx_dprintk(SX_DEBUG_PROBE, " %x",
2464 port->ch_base);
2465 port->line = portno++;
2466 port++;
2467 }
2468 sx_dprintk(SX_DEBUG_PROBE, "\n");
2469 }
2470 /* This has to be done earlier. */
2471 /* board->flags |= SX_BOARD_INITIALIZED; */
2472 }
2473
2474 func_exit();
2475 return 0;
2476 }
2477
2478 static unsigned int sx_find_free_board(void)
2479 {
2480 unsigned int i;
2481
2482 for (i = 0; i < SX_NBOARDS; i++)
2483 if (!(boards[i].flags & SX_BOARD_PRESENT))
2484 break;
2485
2486 return i;
2487 }
2488
2489 static void __exit sx_release_drivers(void)
2490 {
2491 func_enter();
2492 tty_unregister_driver(sx_driver);
2493 put_tty_driver(sx_driver);
2494 func_exit();
2495 }
2496
2497 static void __devexit sx_remove_card(struct sx_board *board,
2498 struct pci_dev *pdev)
2499 {
2500 if (board->flags & SX_BOARD_INITIALIZED) {
2501 /* The board should stop messing with us. (actually I mean the
2502 interrupt) */
2503 sx_reset(board);
2504 if ((board->irq) && (board->flags & SX_IRQ_ALLOCATED))
2505 free_irq(board->irq, board);
2506
2507 /* It is safe/allowed to del_timer a non-active timer */
2508 del_timer(&board->timer);
2509 if (pdev) {
2510 #ifdef CONFIG_PCI
2511 iounmap(board->base2);
2512 pci_release_region(pdev, IS_CF_BOARD(board) ? 3 : 2);
2513 #endif
2514 } else {
2515 iounmap(board->base);
2516 release_region(board->hw_base, board->hw_len);
2517 }
2518
2519 board->flags &= ~(SX_BOARD_INITIALIZED | SX_BOARD_PRESENT);
2520 }
2521 }
2522
2523 #ifdef CONFIG_EISA
2524
2525 static int __devinit sx_eisa_probe(struct device *dev)
2526 {
2527 struct eisa_device *edev = to_eisa_device(dev);
2528 struct sx_board *board;
2529 unsigned long eisa_slot = edev->base_addr;
2530 unsigned int i;
2531 int retval = -EIO;
2532
2533 mutex_lock(&sx_boards_lock);
2534 i = sx_find_free_board();
2535 if (i == SX_NBOARDS) {
2536 mutex_unlock(&sx_boards_lock);
2537 goto err;
2538 }
2539 board = &boards[i];
2540 board->flags |= SX_BOARD_PRESENT;
2541 mutex_unlock(&sx_boards_lock);
2542
2543 dev_info(dev, "XIO : Signature found in EISA slot %lu, "
2544 "Product %d Rev %d (REPORT THIS TO LKLM)\n",
2545 eisa_slot >> 12,
2546 inb(eisa_slot + EISA_VENDOR_ID_OFFSET + 2),
2547 inb(eisa_slot + EISA_VENDOR_ID_OFFSET + 3));
2548
2549 board->eisa_base = eisa_slot;
2550 board->flags &= ~SX_BOARD_TYPE;
2551 board->flags |= SI_EISA_BOARD;
2552
2553 board->hw_base = ((inb(eisa_slot + 0xc01) << 8) +
2554 inb(eisa_slot + 0xc00)) << 16;
2555 board->hw_len = SI2_EISA_WINDOW_LEN;
2556 if (!request_region(board->hw_base, board->hw_len, "sx")) {
2557 dev_err(dev, "can't request region\n");
2558 goto err_flag;
2559 }
2560 board->base2 =
2561 board->base = ioremap_nocache(board->hw_base, SI2_EISA_WINDOW_LEN);
2562 if (!board->base) {
2563 dev_err(dev, "can't remap memory\n");
2564 goto err_reg;
2565 }
2566
2567 sx_dprintk(SX_DEBUG_PROBE, "IO hw_base address: %lx\n", board->hw_base);
2568 sx_dprintk(SX_DEBUG_PROBE, "base: %p\n", board->base);
2569 board->irq = inb(eisa_slot + 0xc02) >> 4;
2570 sx_dprintk(SX_DEBUG_PROBE, "IRQ: %d\n", board->irq);
2571
2572 if (!probe_si(board))
2573 goto err_unmap;
2574
2575 dev_set_drvdata(dev, board);
2576
2577 return 0;
2578 err_unmap:
2579 iounmap(board->base);
2580 err_reg:
2581 release_region(board->hw_base, board->hw_len);
2582 err_flag:
2583 board->flags &= ~SX_BOARD_PRESENT;
2584 err:
2585 return retval;
2586 }
2587
2588 static int __devexit sx_eisa_remove(struct device *dev)
2589 {
2590 struct sx_board *board = dev_get_drvdata(dev);
2591
2592 sx_remove_card(board, NULL);
2593
2594 return 0;
2595 }
2596
2597 static struct eisa_device_id sx_eisa_tbl[] = {
2598 { "SLX" },
2599 { "" }
2600 };
2601
2602 MODULE_DEVICE_TABLE(eisa, sx_eisa_tbl);
2603
2604 static struct eisa_driver sx_eisadriver = {
2605 .id_table = sx_eisa_tbl,
2606 .driver = {
2607 .name = "sx",
2608 .probe = sx_eisa_probe,
2609 .remove = __devexit_p(sx_eisa_remove),
2610 }
2611 };
2612
2613 #endif
2614
2615 #ifdef CONFIG_PCI
2616 /********************************************************
2617 * Setting bit 17 in the CNTRL register of the PLX 9050 *
2618 * chip forces a retry on writes while a read is pending.*
2619 * This is to prevent the card locking up on Intel Xeon *
2620 * multiprocessor systems with the NX chipset. -- NV *
2621 ********************************************************/
2622
2623 /* Newer cards are produced with this bit set from the configuration
2624 EEprom. As the bit is read/write for the CPU, we can fix it here,
2625 if we detect that it isn't set correctly. -- REW */
2626
2627 static void __devinit fix_sx_pci(struct pci_dev *pdev, struct sx_board *board)
2628 {
2629 unsigned int hwbase;
2630 void __iomem *rebase;
2631 unsigned int t;
2632
2633 #define CNTRL_REG_OFFSET 0x50
2634 #define CNTRL_REG_GOODVALUE 0x18260000
2635
2636 pci_read_config_dword(pdev, PCI_BASE_ADDRESS_0, &hwbase);
2637 hwbase &= PCI_BASE_ADDRESS_MEM_MASK;
2638 rebase = ioremap_nocache(hwbase, 0x80);
2639 t = readl(rebase + CNTRL_REG_OFFSET);
2640 if (t != CNTRL_REG_GOODVALUE) {
2641 printk(KERN_DEBUG "sx: performing cntrl reg fix: %08x -> "
2642 "%08x\n", t, CNTRL_REG_GOODVALUE);
2643 writel(CNTRL_REG_GOODVALUE, rebase + CNTRL_REG_OFFSET);
2644 }
2645 iounmap(rebase);
2646 }
2647 #endif
2648
2649 static int __devinit sx_pci_probe(struct pci_dev *pdev,
2650 const struct pci_device_id *ent)
2651 {
2652 #ifdef CONFIG_PCI
2653 struct sx_board *board;
2654 unsigned int i, reg;
2655 int retval = -EIO;
2656
2657 mutex_lock(&sx_boards_lock);
2658 i = sx_find_free_board();
2659 if (i == SX_NBOARDS) {
2660 mutex_unlock(&sx_boards_lock);
2661 goto err;
2662 }
2663 board = &boards[i];
2664 board->flags |= SX_BOARD_PRESENT;
2665 mutex_unlock(&sx_boards_lock);
2666
2667 retval = pci_enable_device(pdev);
2668 if (retval)
2669 goto err_flag;
2670
2671 board->flags &= ~SX_BOARD_TYPE;
2672 board->flags |= (pdev->subsystem_vendor == 0x200) ? SX_PCI_BOARD :
2673 SX_CFPCI_BOARD;
2674
2675 /* CF boards use base address 3.... */
2676 reg = IS_CF_BOARD(board) ? 3 : 2;
2677 retval = pci_request_region(pdev, reg, "sx");
2678 if (retval) {
2679 dev_err(&pdev->dev, "can't request region\n");
2680 goto err_flag;
2681 }
2682 board->hw_base = pci_resource_start(pdev, reg);
2683 board->base2 =
2684 board->base = ioremap_nocache(board->hw_base, WINDOW_LEN(board));
2685 if (!board->base) {
2686 dev_err(&pdev->dev, "ioremap failed\n");
2687 goto err_reg;
2688 }
2689
2690 /* Most of the stuff on the CF board is offset by 0x18000 .... */
2691 if (IS_CF_BOARD(board))
2692 board->base += 0x18000;
2693
2694 board->irq = pdev->irq;
2695
2696 dev_info(&pdev->dev, "Got a specialix card: %p(%d) %x.\n", board->base,
2697 board->irq, board->flags);
2698
2699 if (!probe_sx(board)) {
2700 retval = -EIO;
2701 goto err_unmap;
2702 }
2703
2704 fix_sx_pci(pdev, board);
2705
2706 pci_set_drvdata(pdev, board);
2707
2708 return 0;
2709 err_unmap:
2710 iounmap(board->base2);
2711 err_reg:
2712 pci_release_region(pdev, reg);
2713 err_flag:
2714 board->flags &= ~SX_BOARD_PRESENT;
2715 err:
2716 return retval;
2717 #else
2718 return -ENODEV;
2719 #endif
2720 }
2721
2722 static void __devexit sx_pci_remove(struct pci_dev *pdev)
2723 {
2724 struct sx_board *board = pci_get_drvdata(pdev);
2725
2726 sx_remove_card(board, pdev);
2727 }
2728
2729 /* Specialix has a whole bunch of cards with 0x2000 as the device ID. They say
2730 its because the standard requires it. So check for SUBVENDOR_ID. */
2731 static struct pci_device_id sx_pci_tbl[] = {
2732 { PCI_VENDOR_ID_SPECIALIX, PCI_DEVICE_ID_SPECIALIX_SX_XIO_IO8,
2733 .subvendor = PCI_ANY_ID, .subdevice = 0x0200 },
2734 { PCI_VENDOR_ID_SPECIALIX, PCI_DEVICE_ID_SPECIALIX_SX_XIO_IO8,
2735 .subvendor = PCI_ANY_ID, .subdevice = 0x0300 },
2736 { 0 }
2737 };
2738
2739 MODULE_DEVICE_TABLE(pci, sx_pci_tbl);
2740
2741 static struct pci_driver sx_pcidriver = {
2742 .name = "sx",
2743 .id_table = sx_pci_tbl,
2744 .probe = sx_pci_probe,
2745 .remove = __devexit_p(sx_pci_remove)
2746 };
2747
2748 static int __init sx_init(void)
2749 {
2750 #ifdef CONFIG_EISA
2751 int retval1;
2752 #endif
2753 #ifdef CONFIG_ISA
2754 struct sx_board *board;
2755 unsigned int i;
2756 #endif
2757 unsigned int found = 0;
2758 int retval;
2759
2760 func_enter();
2761 sx_dprintk(SX_DEBUG_INIT, "Initing sx module... (sx_debug=%d)\n",
2762 sx_debug);
2763 if (abs((long)(&sx_debug) - sx_debug) < 0x10000) {
2764 printk(KERN_WARNING "sx: sx_debug is an address, instead of a "
2765 "value. Assuming -1.\n(%p)\n", &sx_debug);
2766 sx_debug = -1;
2767 }
2768
2769 if (misc_register(&sx_fw_device) < 0) {
2770 printk(KERN_ERR "SX: Unable to register firmware loader "
2771 "driver.\n");
2772 return -EIO;
2773 }
2774 #ifdef CONFIG_ISA
2775 for (i = 0; i < NR_SX_ADDRS; i++) {
2776 board = &boards[found];
2777 board->hw_base = sx_probe_addrs[i];
2778 board->hw_len = SX_WINDOW_LEN;
2779 if (!request_region(board->hw_base, board->hw_len, "sx"))
2780 continue;
2781 board->base2 =
2782 board->base = ioremap_nocache(board->hw_base, board->hw_len);
2783 if (!board->base)
2784 goto err_sx_reg;
2785 board->flags &= ~SX_BOARD_TYPE;
2786 board->flags |= SX_ISA_BOARD;
2787 board->irq = sx_irqmask ? -1 : 0;
2788
2789 if (probe_sx(board)) {
2790 board->flags |= SX_BOARD_PRESENT;
2791 found++;
2792 } else {
2793 iounmap(board->base);
2794 err_sx_reg:
2795 release_region(board->hw_base, board->hw_len);
2796 }
2797 }
2798
2799 for (i = 0; i < NR_SI_ADDRS; i++) {
2800 board = &boards[found];
2801 board->hw_base = si_probe_addrs[i];
2802 board->hw_len = SI2_ISA_WINDOW_LEN;
2803 if (!request_region(board->hw_base, board->hw_len, "sx"))
2804 continue;
2805 board->base2 =
2806 board->base = ioremap_nocache(board->hw_base, board->hw_len);
2807 if (!board->base)
2808 goto err_si_reg;
2809 board->flags &= ~SX_BOARD_TYPE;
2810 board->flags |= SI_ISA_BOARD;
2811 board->irq = sx_irqmask ? -1 : 0;
2812
2813 if (probe_si(board)) {
2814 board->flags |= SX_BOARD_PRESENT;
2815 found++;
2816 } else {
2817 iounmap(board->base);
2818 err_si_reg:
2819 release_region(board->hw_base, board->hw_len);
2820 }
2821 }
2822 for (i = 0; i < NR_SI1_ADDRS; i++) {
2823 board = &boards[found];
2824 board->hw_base = si1_probe_addrs[i];
2825 board->hw_len = SI1_ISA_WINDOW_LEN;
2826 if (!request_region(board->hw_base, board->hw_len, "sx"))
2827 continue;
2828 board->base2 =
2829 board->base = ioremap_nocache(board->hw_base, board->hw_len);
2830 if (!board->base)
2831 goto err_si1_reg;
2832 board->flags &= ~SX_BOARD_TYPE;
2833 board->flags |= SI1_ISA_BOARD;
2834 board->irq = sx_irqmask ? -1 : 0;
2835
2836 if (probe_si(board)) {
2837 board->flags |= SX_BOARD_PRESENT;
2838 found++;
2839 } else {
2840 iounmap(board->base);
2841 err_si1_reg:
2842 release_region(board->hw_base, board->hw_len);
2843 }
2844 }
2845 #endif
2846 #ifdef CONFIG_EISA
2847 retval1 = eisa_driver_register(&sx_eisadriver);
2848 #endif
2849 retval = pci_register_driver(&sx_pcidriver);
2850
2851 if (found) {
2852 printk(KERN_INFO "sx: total of %d boards detected.\n", found);
2853 retval = 0;
2854 } else if (retval) {
2855 #ifdef CONFIG_EISA
2856 retval = retval1;
2857 if (retval1)
2858 #endif
2859 misc_deregister(&sx_fw_device);
2860 }
2861
2862 func_exit();
2863 return retval;
2864 }
2865
2866 static void __exit sx_exit(void)
2867 {
2868 int i;
2869
2870 func_enter();
2871 #ifdef CONFIG_EISA
2872 eisa_driver_unregister(&sx_eisadriver);
2873 #endif
2874 pci_unregister_driver(&sx_pcidriver);
2875
2876 for (i = 0; i < SX_NBOARDS; i++)
2877 sx_remove_card(&boards[i], NULL);
2878
2879 if (misc_deregister(&sx_fw_device) < 0) {
2880 printk(KERN_INFO "sx: couldn't deregister firmware loader "
2881 "device\n");
2882 }
2883 sx_dprintk(SX_DEBUG_CLEANUP, "Cleaning up drivers (%d)\n",
2884 sx_initialized);
2885 if (sx_initialized)
2886 sx_release_drivers();
2887
2888 kfree(sx_ports);
2889 func_exit();
2890 }
2891
2892 module_init(sx_init);
2893 module_exit(sx_exit);
Support for the Chinese Samsung S3C2440 based development boards