Contents of /alx-src/tags/kernel26-2.6.12-alx-r9/drivers/char/sx.c
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Wed Mar 4 11:03:09 2009 UTC (15 years, 6 months ago) by niro
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File size: 75421 byte(s)
Tag kernel26-2.6.12-alx-r9
1 | |
2 | /* sx.c -- driver for the Specialix SX series cards. |
3 | * |
4 | * This driver will also support the older SI, and XIO cards. |
5 | * |
6 | * |
7 | * (C) 1998 - 2004 R.E.Wolff@BitWizard.nl |
8 | * |
9 | * Simon Allen (simonallen@cix.compulink.co.uk) wrote a previous |
10 | * version of this driver. Some fragments may have been copied. (none |
11 | * yet :-) |
12 | * |
13 | * Specialix pays for the development and support of this driver. |
14 | * Please DO contact support@specialix.co.uk if you require |
15 | * support. But please read the documentation (sx.txt) first. |
16 | * |
17 | * |
18 | * |
19 | * This program is free software; you can redistribute it and/or |
20 | * modify it under the terms of the GNU General Public License as |
21 | * published by the Free Software Foundation; either version 2 of |
22 | * the License, or (at your option) any later version. |
23 | * |
24 | * This program is distributed in the hope that it will be |
25 | * useful, but WITHOUT ANY WARRANTY; without even the implied |
26 | * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR |
27 | * PURPOSE. See the GNU General Public License for more details. |
28 | * |
29 | * You should have received a copy of the GNU General Public |
30 | * License along with this program; if not, write to the Free |
31 | * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, |
32 | * USA. |
33 | * |
34 | * Revision history: |
35 | * $Log: sx.c,v $ |
36 | * Revision 1.33 2000/03/09 10:00:00 pvdl,wolff |
37 | * - Fixed module and port counting |
38 | * - Fixed signal handling |
39 | * - Fixed an Ooops |
40 | * |
41 | * Revision 1.32 2000/03/07 09:00:00 wolff,pvdl |
42 | * - Fixed some sx_dprintk typos |
43 | * - added detection for an invalid board/module configuration |
44 | * |
45 | * Revision 1.31 2000/03/06 12:00:00 wolff,pvdl |
46 | * - Added support for EISA |
47 | * |
48 | * Revision 1.30 2000/01/21 17:43:06 wolff |
49 | * - Added support for SX+ |
50 | * |
51 | * Revision 1.26 1999/08/05 15:22:14 wolff |
52 | * - Port to 2.3.x |
53 | * - Reformatted to Linus' liking. |
54 | * |
55 | * Revision 1.25 1999/07/30 14:24:08 wolff |
56 | * Had accidentally left "gs_debug" set to "-1" instead of "off" (=0). |
57 | * |
58 | * Revision 1.24 1999/07/28 09:41:52 wolff |
59 | * - I noticed the remark about use-count straying in sx.txt. I checked |
60 | * sx_open, and found a few places where that could happen. I hope it's |
61 | * fixed now. |
62 | * |
63 | * Revision 1.23 1999/07/28 08:56:06 wolff |
64 | * - Fixed crash when sx_firmware run twice. |
65 | * - Added sx_slowpoll as a module parameter (I guess nobody really wanted |
66 | * to change it from the default... ) |
67 | * - Fixed a stupid editing problem I introduced in 1.22. |
68 | * - Fixed dropping characters on a termios change. |
69 | * |
70 | * Revision 1.22 1999/07/26 21:01:43 wolff |
71 | * Russell Brown noticed that I had overlooked 4 out of six modem control |
72 | * signals in sx_getsignals. Ooops. |
73 | * |
74 | * Revision 1.21 1999/07/23 09:11:33 wolff |
75 | * I forgot to free dynamically allocated memory when the driver is unloaded. |
76 | * |
77 | * Revision 1.20 1999/07/20 06:25:26 wolff |
78 | * The "closing wait" wasn't honoured. Thanks to James Griffiths for |
79 | * reporting this. |
80 | * |
81 | * Revision 1.19 1999/07/11 08:59:59 wolff |
82 | * Fixed an oops in close, when an open was pending. Changed the memtest |
83 | * a bit. Should also test the board in word-mode, however my card fails the |
84 | * memtest then. I still have to figure out what is wrong... |
85 | * |
86 | * Revision 1.18 1999/06/10 09:38:42 wolff |
87 | * Changed the format of the firmware revision from %04x to %x.%02x . |
88 | * |
89 | * Revision 1.17 1999/06/04 09:44:35 wolff |
90 | * fixed problem: reference to pci stuff when config_pci was off... |
91 | * Thanks to Jorge Novo for noticing this. |
92 | * |
93 | * Revision 1.16 1999/06/02 08:30:15 wolff |
94 | * added/removed the workaround for the DCD bug in the Firmware. |
95 | * A bit more debugging code to locate that... |
96 | * |
97 | * Revision 1.15 1999/06/01 11:35:30 wolff |
98 | * when DCD is left low (floating?), on TA's the firmware first tells us |
99 | * that DCD is high, but after a short while suddenly comes to the |
100 | * conclusion that it is low. All this would be fine, if it weren't that |
101 | * Unix requires us to send a "hangup" signal in that case. This usually |
102 | * all happens BEFORE the program has had a chance to ioctl the device |
103 | * into clocal mode.. |
104 | * |
105 | * Revision 1.14 1999/05/25 11:18:59 wolff |
106 | * Added PCI-fix. |
107 | * Added checks for return code of sx_sendcommand. |
108 | * Don't issue "reconfig" if port isn't open yet. (bit us on TA modules...) |
109 | * |
110 | * Revision 1.13 1999/04/29 15:18:01 wolff |
111 | * Fixed an "oops" that showed on SuSE 6.0 systems. |
112 | * Activate DTR again after stty 0. |
113 | * |
114 | * Revision 1.12 1999/04/29 07:49:52 wolff |
115 | * Improved "stty 0" handling a bit. (used to change baud to 9600 assuming |
116 | * the connection would be dropped anyway. That is not always the case, |
117 | * and confuses people). |
118 | * Told the card to always monitor the modem signals. |
119 | * Added support for dynamic gs_debug adjustments. |
120 | * Now tells the rest of the system the number of ports. |
121 | * |
122 | * Revision 1.11 1999/04/24 11:11:30 wolff |
123 | * Fixed two stupid typos in the memory test. |
124 | * |
125 | * Revision 1.10 1999/04/24 10:53:39 wolff |
126 | * Added some of Christian's suggestions. |
127 | * Fixed an HW_COOK_IN bug (ISIG was not in I_OTHER. We used to trust the |
128 | * card to send the signal to the process.....) |
129 | * |
130 | * Revision 1.9 1999/04/23 07:26:38 wolff |
131 | * Included Christian Lademann's 2.0 compile-warning fixes and interrupt |
132 | * assignment redesign. |
133 | * Cleanup of some other stuff. |
134 | * |
135 | * Revision 1.8 1999/04/16 13:05:30 wolff |
136 | * fixed a DCD change unnoticed bug. |
137 | * |
138 | * Revision 1.7 1999/04/14 22:19:51 wolff |
139 | * Fixed typo that showed up in 2.0.x builds (get_user instead of Get_user!) |
140 | * |
141 | * Revision 1.6 1999/04/13 18:40:20 wolff |
142 | * changed misc-minor to 161, as assigned by HPA. |
143 | * |
144 | * Revision 1.5 1999/04/13 15:12:25 wolff |
145 | * Fixed use-count leak when "hangup" occurred. |
146 | * Added workaround for a stupid-PCIBIOS bug. |
147 | * |
148 | * |
149 | * Revision 1.4 1999/04/01 22:47:40 wolff |
150 | * Fixed < 1M linux-2.0 problem. |
151 | * (vremap isn't compatible with ioremap in that case) |
152 | * |
153 | * Revision 1.3 1999/03/31 13:45:45 wolff |
154 | * Firmware loading is now done through a separate IOCTL. |
155 | * |
156 | * Revision 1.2 1999/03/28 12:22:29 wolff |
157 | * rcs cleanup |
158 | * |
159 | * Revision 1.1 1999/03/28 12:10:34 wolff |
160 | * Readying for release on 2.0.x (sorry David, 1.01 becomes 1.1 for RCS). |
161 | * |
162 | * Revision 0.12 1999/03/28 09:20:10 wolff |
163 | * Fixed problem in 0.11, continueing cleanup. |
164 | * |
165 | * Revision 0.11 1999/03/28 08:46:44 wolff |
166 | * cleanup. Not good. |
167 | * |
168 | * Revision 0.10 1999/03/28 08:09:43 wolff |
169 | * Fixed loosing characters on close. |
170 | * |
171 | * Revision 0.9 1999/03/21 22:52:01 wolff |
172 | * Ported back to 2.2.... (minor things) |
173 | * |
174 | * Revision 0.8 1999/03/21 22:40:33 wolff |
175 | * Port to 2.0 |
176 | * |
177 | * Revision 0.7 1999/03/21 19:06:34 wolff |
178 | * Fixed hangup processing. |
179 | * |
180 | * Revision 0.6 1999/02/05 08:45:14 wolff |
181 | * fixed real_raw problems. Inclusion into kernel imminent. |
182 | * |
183 | * Revision 0.5 1998/12/21 23:51:06 wolff |
184 | * Snatched a nasty bug: sx_transmit_chars was getting re-entered, and it |
185 | * shouldn't have. THATs why I want to have transmit interrupts even when |
186 | * the buffer is empty. |
187 | * |
188 | * Revision 0.4 1998/12/17 09:34:46 wolff |
189 | * PPP works. ioctl works. Basically works! |
190 | * |
191 | * Revision 0.3 1998/12/15 13:05:18 wolff |
192 | * It works! Wow! Gotta start implementing IOCTL and stuff.... |
193 | * |
194 | * Revision 0.2 1998/12/01 08:33:53 wolff |
195 | * moved over to 2.1.130 |
196 | * |
197 | * Revision 0.1 1998/11/03 21:23:51 wolff |
198 | * Initial revision. Detects SX card. |
199 | * |
200 | * */ |
201 | |
202 | |
203 | #define RCS_ID "$Id: sx.c,v 1.33 2000/03/08 10:01:02 wolff, pvdl Exp $" |
204 | #define RCS_REV "$Revision: 1.33 $" |
205 | |
206 | |
207 | #include <linux/module.h> |
208 | #include <linux/config.h> |
209 | #include <linux/kdev_t.h> |
210 | #include <linux/kernel.h> |
211 | #include <linux/sched.h> |
212 | #include <linux/ioport.h> |
213 | #include <linux/interrupt.h> |
214 | #include <linux/errno.h> |
215 | #include <linux/tty.h> |
216 | #include <linux/tty_flip.h> |
217 | #include <linux/mm.h> |
218 | #include <linux/serial.h> |
219 | #include <linux/fcntl.h> |
220 | #include <linux/major.h> |
221 | #include <linux/delay.h> |
222 | #include <linux/pci.h> |
223 | #include <linux/slab.h> |
224 | #include <linux/init.h> |
225 | #include <linux/miscdevice.h> |
226 | #include <linux/bitops.h> |
227 | |
228 | #include <asm/io.h> |
229 | #include <asm/uaccess.h> |
230 | |
231 | /* The 3.0.0 version of sxboards/sxwindow.h uses BYTE and WORD.... */ |
232 | #define BYTE u8 |
233 | #define WORD u16 |
234 | |
235 | /* .... but the 3.0.4 version uses _u8 and _u16. */ |
236 | #define _u8 u8 |
237 | #define _u16 u16 |
238 | |
239 | #include "sxboards.h" |
240 | #include "sxwindow.h" |
241 | |
242 | #include <linux/generic_serial.h> |
243 | #include "sx.h" |
244 | |
245 | |
246 | /* I don't think that this driver can handle more than 256 ports on |
247 | one machine. You'll have to increase the number of boards in sx.h |
248 | if you want more than 4 boards. */ |
249 | |
250 | #ifndef PCI_DEVICE_ID_SPECIALIX_SX_XIO_IO8 |
251 | #define PCI_DEVICE_ID_SPECIALIX_SX_XIO_IO8 0x2000 |
252 | #endif |
253 | |
254 | #ifdef CONFIG_PCI |
255 | static struct pci_device_id sx_pci_tbl[] = { |
256 | { PCI_VENDOR_ID_SPECIALIX, PCI_DEVICE_ID_SPECIALIX_SX_XIO_IO8, PCI_ANY_ID, PCI_ANY_ID }, |
257 | { 0 } |
258 | }; |
259 | MODULE_DEVICE_TABLE(pci, sx_pci_tbl); |
260 | #endif /* CONFIG_PCI */ |
261 | |
262 | /* Configurable options: |
263 | (Don't be too sure that it'll work if you toggle them) */ |
264 | |
265 | /* Am I paranoid or not ? ;-) */ |
266 | #undef SX_PARANOIA_CHECK |
267 | |
268 | |
269 | /* 20 -> 2000 per second. The card should rate-limit interrupts at 100 |
270 | Hz, but it is user configurable. I don't recommend going above 1000 |
271 | Hz. The interrupt ratelimit might trigger if the interrupt is |
272 | shared with a very active other device. */ |
273 | #define IRQ_RATE_LIMIT 20 |
274 | |
275 | /* Sharing interrupts is possible now. If the other device wants more |
276 | than 2000 interrupts per second, we'd gracefully decline further |
277 | interrupts. That's not what we want. On the other hand, if the |
278 | other device interrupts 2000 times a second, don't use the SX |
279 | interrupt. Use polling. */ |
280 | #undef IRQ_RATE_LIMIT |
281 | |
282 | |
283 | #if 0 |
284 | /* Not implemented */ |
285 | /* |
286 | * The following defines are mostly for testing purposes. But if you need |
287 | * some nice reporting in your syslog, you can define them also. |
288 | */ |
289 | #define SX_REPORT_FIFO |
290 | #define SX_REPORT_OVERRUN |
291 | #endif |
292 | |
293 | |
294 | /* Function prototypes */ |
295 | static void sx_disable_tx_interrupts (void * ptr); |
296 | static void sx_enable_tx_interrupts (void * ptr); |
297 | static void sx_disable_rx_interrupts (void * ptr); |
298 | static void sx_enable_rx_interrupts (void * ptr); |
299 | static int sx_get_CD (void * ptr); |
300 | static void sx_shutdown_port (void * ptr); |
301 | static int sx_set_real_termios (void *ptr); |
302 | static void sx_close (void *ptr); |
303 | static int sx_chars_in_buffer (void * ptr); |
304 | static int sx_init_board (struct sx_board *board); |
305 | static int sx_init_portstructs (int nboards, int nports); |
306 | static int sx_fw_ioctl (struct inode *inode, struct file *filp, |
307 | unsigned int cmd, unsigned long arg); |
308 | static int sx_init_drivers(void); |
309 | |
310 | |
311 | static struct tty_driver *sx_driver; |
312 | |
313 | static struct sx_board boards[SX_NBOARDS]; |
314 | static struct sx_port *sx_ports; |
315 | static int sx_initialized; |
316 | static int sx_nports; |
317 | static int sx_debug; |
318 | |
319 | |
320 | /* You can have the driver poll your card. |
321 | - Set sx_poll to 1 to poll every timer tick (10ms on Intel). |
322 | This is used when the card cannot use an interrupt for some reason. |
323 | |
324 | - set sx_slowpoll to 100 to do an extra poll once a second (on Intel). If |
325 | the driver misses an interrupt (report this if it DOES happen to you!) |
326 | everything will continue to work.... |
327 | */ |
328 | static int sx_poll = 1; |
329 | static int sx_slowpoll; |
330 | |
331 | /* The card limits the number of interrupts per second. |
332 | At 115k2 "100" should be sufficient. |
333 | If you're using higher baudrates, you can increase this... |
334 | */ |
335 | |
336 | static int sx_maxints = 100; |
337 | |
338 | /* These are the only open spaces in my computer. Yours may have more |
339 | or less.... -- REW |
340 | duh: Card at 0xa0000 is possible on HP Netserver?? -- pvdl |
341 | */ |
342 | static int sx_probe_addrs[]= {0xc0000, 0xd0000, 0xe0000, |
343 | 0xc8000, 0xd8000, 0xe8000}; |
344 | static int si_probe_addrs[]= {0xc0000, 0xd0000, 0xe0000, |
345 | 0xc8000, 0xd8000, 0xe8000, 0xa0000}; |
346 | static int si1_probe_addrs[]= { 0xd0000}; |
347 | |
348 | #define NR_SX_ADDRS (sizeof(sx_probe_addrs)/sizeof (int)) |
349 | #define NR_SI_ADDRS (sizeof(si_probe_addrs)/sizeof (int)) |
350 | #define NR_SI1_ADDRS (sizeof(si1_probe_addrs)/sizeof (int)) |
351 | |
352 | |
353 | /* Set the mask to all-ones. This alas, only supports 32 interrupts. |
354 | Some architectures may need more. */ |
355 | static int sx_irqmask = -1; |
356 | |
357 | module_param_array(sx_probe_addrs, int, NULL, 0); |
358 | module_param_array(si_probe_addrs, int, NULL, 0); |
359 | module_param(sx_poll, int, 0); |
360 | module_param(sx_slowpoll, int, 0); |
361 | module_param(sx_maxints, int, 0); |
362 | module_param(sx_debug, int, 0); |
363 | module_param(sx_irqmask, int, 0); |
364 | |
365 | MODULE_LICENSE("GPL"); |
366 | |
367 | static struct real_driver sx_real_driver = { |
368 | sx_disable_tx_interrupts, |
369 | sx_enable_tx_interrupts, |
370 | sx_disable_rx_interrupts, |
371 | sx_enable_rx_interrupts, |
372 | sx_get_CD, |
373 | sx_shutdown_port, |
374 | sx_set_real_termios, |
375 | sx_chars_in_buffer, |
376 | sx_close, |
377 | }; |
378 | |
379 | |
380 | /* |
381 | This driver can spew a whole lot of debugging output at you. If you |
382 | need maximum performance, you should disable the DEBUG define. To |
383 | aid in debugging in the field, I'm leaving the compile-time debug |
384 | features enabled, and disable them "runtime". That allows me to |
385 | instruct people with problems to enable debugging without requiring |
386 | them to recompile... |
387 | */ |
388 | #define DEBUG |
389 | |
390 | |
391 | #ifdef DEBUG |
392 | #define sx_dprintk(f, str...) if (sx_debug & f) printk (str) |
393 | #else |
394 | #define sx_dprintk(f, str...) /* nothing */ |
395 | #endif |
396 | |
397 | |
398 | |
399 | #define func_enter() sx_dprintk (SX_DEBUG_FLOW, "sx: enter %s\n",__FUNCTION__) |
400 | #define func_exit() sx_dprintk (SX_DEBUG_FLOW, "sx: exit %s\n", __FUNCTION__) |
401 | |
402 | #define func_enter2() sx_dprintk (SX_DEBUG_FLOW, "sx: enter %s (port %d)\n", \ |
403 | __FUNCTION__, port->line) |
404 | |
405 | |
406 | |
407 | |
408 | /* |
409 | * Firmware loader driver specific routines |
410 | * |
411 | */ |
412 | |
413 | static struct file_operations sx_fw_fops = { |
414 | .owner = THIS_MODULE, |
415 | .ioctl = sx_fw_ioctl, |
416 | }; |
417 | |
418 | static struct miscdevice sx_fw_device = { |
419 | SXCTL_MISC_MINOR, "sxctl", &sx_fw_fops |
420 | }; |
421 | |
422 | |
423 | |
424 | |
425 | |
426 | #ifdef SX_PARANOIA_CHECK |
427 | |
428 | /* This doesn't work. Who's paranoid around here? Not me! */ |
429 | |
430 | static inline int sx_paranoia_check(struct sx_port const * port, |
431 | char *name, const char *routine) |
432 | { |
433 | |
434 | static const char *badmagic = |
435 | KERN_ERR "sx: Warning: bad sx port magic number for device %s in %s\n"; |
436 | static const char *badinfo = |
437 | KERN_ERR "sx: Warning: null sx port for device %s in %s\n"; |
438 | |
439 | if (!port) { |
440 | printk(badinfo, name, routine); |
441 | return 1; |
442 | } |
443 | if (port->magic != SX_MAGIC) { |
444 | printk(badmagic, name, routine); |
445 | return 1; |
446 | } |
447 | |
448 | return 0; |
449 | } |
450 | #else |
451 | #define sx_paranoia_check(a,b,c) 0 |
452 | #endif |
453 | |
454 | /* The timeouts. First try 30 times as fast as possible. Then give |
455 | the card some time to breathe between accesses. (Otherwise the |
456 | processor on the card might not be able to access its OWN bus... */ |
457 | |
458 | #define TIMEOUT_1 30 |
459 | #define TIMEOUT_2 1000000 |
460 | |
461 | |
462 | #ifdef DEBUG |
463 | static void my_hd_io(void __iomem *p, int len) |
464 | { |
465 | int i, j, ch; |
466 | unsigned char __iomem *addr = p; |
467 | |
468 | for (i=0;i<len;i+=16) { |
469 | printk ("%p ", addr+i); |
470 | for (j=0;j<16;j++) { |
471 | printk ("%02x %s", readb(addr+j+i), (j==7)?" ":""); |
472 | } |
473 | for (j=0;j<16;j++) { |
474 | ch = readb(addr+j+i); |
475 | printk ("%c", (ch < 0x20)?'.':((ch > 0x7f)?'.':ch)); |
476 | } |
477 | printk ("\n"); |
478 | } |
479 | } |
480 | static void my_hd(void *p, int len) |
481 | { |
482 | int i, j, ch; |
483 | unsigned char *addr = p; |
484 | |
485 | for (i=0;i<len;i+=16) { |
486 | printk ("%p ", addr+i); |
487 | for (j=0;j<16;j++) { |
488 | printk ("%02x %s", addr[j+i], (j==7)?" ":""); |
489 | } |
490 | for (j=0;j<16;j++) { |
491 | ch = addr[j+i]; |
492 | printk ("%c", (ch < 0x20)?'.':((ch > 0x7f)?'.':ch)); |
493 | } |
494 | printk ("\n"); |
495 | } |
496 | } |
497 | #endif |
498 | |
499 | |
500 | |
501 | /* This needs redoing for Alpha -- REW -- Done. */ |
502 | |
503 | static inline void write_sx_byte (struct sx_board *board, int offset, u8 byte) |
504 | { |
505 | writeb (byte, board->base+offset); |
506 | } |
507 | |
508 | static inline u8 read_sx_byte (struct sx_board *board, int offset) |
509 | { |
510 | return readb (board->base+offset); |
511 | } |
512 | |
513 | |
514 | static inline void write_sx_word (struct sx_board *board, int offset, u16 word) |
515 | { |
516 | writew (word, board->base+offset); |
517 | } |
518 | |
519 | static inline u16 read_sx_word (struct sx_board *board, int offset) |
520 | { |
521 | return readw (board->base + offset); |
522 | } |
523 | |
524 | |
525 | static int sx_busy_wait_eq (struct sx_board *board, |
526 | int offset, int mask, int correctval) |
527 | { |
528 | int i; |
529 | |
530 | func_enter (); |
531 | |
532 | for (i=0; i < TIMEOUT_1 ;i++) |
533 | if ((read_sx_byte (board, offset) & mask) == correctval) { |
534 | func_exit (); |
535 | return 1; |
536 | } |
537 | |
538 | for (i=0; i < TIMEOUT_2 ;i++) { |
539 | if ((read_sx_byte (board, offset) & mask) == correctval) { |
540 | func_exit (); |
541 | return 1; |
542 | } |
543 | udelay (1); |
544 | } |
545 | |
546 | func_exit (); |
547 | return 0; |
548 | } |
549 | |
550 | |
551 | static int sx_busy_wait_neq (struct sx_board *board, |
552 | int offset, int mask, int badval) |
553 | { |
554 | int i; |
555 | |
556 | func_enter (); |
557 | |
558 | for (i=0; i < TIMEOUT_1 ;i++) |
559 | if ((read_sx_byte (board, offset) & mask) != badval) { |
560 | func_exit (); |
561 | return 1; |
562 | } |
563 | |
564 | for (i=0; i < TIMEOUT_2 ;i++) { |
565 | if ((read_sx_byte (board, offset) & mask) != badval) { |
566 | func_exit (); |
567 | return 1; |
568 | } |
569 | udelay (1); |
570 | } |
571 | |
572 | func_exit (); |
573 | return 0; |
574 | } |
575 | |
576 | |
577 | |
578 | /* 5.6.4 of 6210028 r2.3 */ |
579 | static int sx_reset (struct sx_board *board) |
580 | { |
581 | func_enter (); |
582 | |
583 | if (IS_SX_BOARD (board)) { |
584 | |
585 | write_sx_byte (board, SX_CONFIG, 0); |
586 | write_sx_byte (board, SX_RESET, 1); /* Value doesn't matter */ |
587 | |
588 | if (!sx_busy_wait_eq (board, SX_RESET_STATUS, 1, 0)) { |
589 | printk (KERN_INFO "sx: Card doesn't respond to reset....\n"); |
590 | return 0; |
591 | } |
592 | } else if (IS_EISA_BOARD(board)) { |
593 | outb(board->irq<<4, board->eisa_base+0xc02); |
594 | } else if (IS_SI1_BOARD(board)) { |
595 | write_sx_byte (board, SI1_ISA_RESET, 0); // value does not matter |
596 | } else { |
597 | /* Gory details of the SI/ISA board */ |
598 | write_sx_byte (board, SI2_ISA_RESET, SI2_ISA_RESET_SET); |
599 | write_sx_byte (board, SI2_ISA_IRQ11, SI2_ISA_IRQ11_CLEAR); |
600 | write_sx_byte (board, SI2_ISA_IRQ12, SI2_ISA_IRQ12_CLEAR); |
601 | write_sx_byte (board, SI2_ISA_IRQ15, SI2_ISA_IRQ15_CLEAR); |
602 | write_sx_byte (board, SI2_ISA_INTCLEAR, SI2_ISA_INTCLEAR_CLEAR); |
603 | write_sx_byte (board, SI2_ISA_IRQSET, SI2_ISA_IRQSET_CLEAR); |
604 | } |
605 | |
606 | func_exit (); |
607 | return 1; |
608 | } |
609 | |
610 | |
611 | /* This doesn't work on machines where "NULL" isn't 0 */ |
612 | /* If you have one of those, someone will need to write |
613 | the equivalent of this, which will amount to about 3 lines. I don't |
614 | want to complicate this right now. -- REW |
615 | (See, I do write comments every now and then :-) */ |
616 | #define OFFSETOF(strct, elem) ((long)&(((struct strct *)NULL)->elem)) |
617 | |
618 | |
619 | #define CHAN_OFFSET(port,elem) (port->ch_base + OFFSETOF (_SXCHANNEL, elem)) |
620 | #define MODU_OFFSET(board,addr,elem) (addr + OFFSETOF (_SXMODULE, elem)) |
621 | #define BRD_OFFSET(board,elem) (OFFSETOF (_SXCARD, elem)) |
622 | |
623 | |
624 | #define sx_write_channel_byte(port, elem, val) \ |
625 | write_sx_byte (port->board, CHAN_OFFSET (port, elem), val) |
626 | |
627 | #define sx_read_channel_byte(port, elem) \ |
628 | read_sx_byte (port->board, CHAN_OFFSET (port, elem)) |
629 | |
630 | #define sx_write_channel_word(port, elem, val) \ |
631 | write_sx_word (port->board, CHAN_OFFSET (port, elem), val) |
632 | |
633 | #define sx_read_channel_word(port, elem) \ |
634 | read_sx_word (port->board, CHAN_OFFSET (port, elem)) |
635 | |
636 | |
637 | #define sx_write_module_byte(board, addr, elem, val) \ |
638 | write_sx_byte (board, MODU_OFFSET (board, addr, elem), val) |
639 | |
640 | #define sx_read_module_byte(board, addr, elem) \ |
641 | read_sx_byte (board, MODU_OFFSET (board, addr, elem)) |
642 | |
643 | #define sx_write_module_word(board, addr, elem, val) \ |
644 | write_sx_word (board, MODU_OFFSET (board, addr, elem), val) |
645 | |
646 | #define sx_read_module_word(board, addr, elem) \ |
647 | read_sx_word (board, MODU_OFFSET (board, addr, elem)) |
648 | |
649 | |
650 | #define sx_write_board_byte(board, elem, val) \ |
651 | write_sx_byte (board, BRD_OFFSET (board, elem), val) |
652 | |
653 | #define sx_read_board_byte(board, elem) \ |
654 | read_sx_byte (board, BRD_OFFSET (board, elem)) |
655 | |
656 | #define sx_write_board_word(board, elem, val) \ |
657 | write_sx_word (board, BRD_OFFSET (board, elem), val) |
658 | |
659 | #define sx_read_board_word(board, elem) \ |
660 | read_sx_word (board, BRD_OFFSET (board, elem)) |
661 | |
662 | |
663 | static int sx_start_board (struct sx_board *board) |
664 | { |
665 | if (IS_SX_BOARD (board)) { |
666 | write_sx_byte (board, SX_CONFIG, SX_CONF_BUSEN); |
667 | } else if (IS_EISA_BOARD(board)) { |
668 | write_sx_byte(board, SI2_EISA_OFF, SI2_EISA_VAL); |
669 | outb((board->irq<<4)|4, board->eisa_base+0xc02); |
670 | } else if (IS_SI1_BOARD(board)) { |
671 | write_sx_byte (board, SI1_ISA_RESET_CLEAR, 0); |
672 | write_sx_byte (board, SI1_ISA_INTCL, 0); |
673 | } else { |
674 | /* Don't bug me about the clear_set. |
675 | I haven't the foggiest idea what it's about -- REW */ |
676 | write_sx_byte (board, SI2_ISA_RESET, SI2_ISA_RESET_CLEAR); |
677 | write_sx_byte (board, SI2_ISA_INTCLEAR, SI2_ISA_INTCLEAR_SET); |
678 | } |
679 | return 1; |
680 | } |
681 | |
682 | #define SX_IRQ_REG_VAL(board) \ |
683 | ((board->flags & SX_ISA_BOARD)?(board->irq << 4):0) |
684 | |
685 | /* Note. The SX register is write-only. Therefore, we have to enable the |
686 | bus too. This is a no-op, if you don't mess with this driver... */ |
687 | static int sx_start_interrupts (struct sx_board *board) |
688 | { |
689 | |
690 | /* Don't call this with board->irq == 0 */ |
691 | |
692 | if (IS_SX_BOARD(board)) { |
693 | write_sx_byte (board, SX_CONFIG, SX_IRQ_REG_VAL (board) | |
694 | SX_CONF_BUSEN | |
695 | SX_CONF_HOSTIRQ); |
696 | } else if (IS_EISA_BOARD(board)) { |
697 | inb(board->eisa_base+0xc03); |
698 | } else if (IS_SI1_BOARD(board)) { |
699 | write_sx_byte (board, SI1_ISA_INTCL,0); |
700 | write_sx_byte (board, SI1_ISA_INTCL_CLEAR,0); |
701 | } else { |
702 | switch (board->irq) { |
703 | case 11:write_sx_byte (board, SI2_ISA_IRQ11, SI2_ISA_IRQ11_SET);break; |
704 | case 12:write_sx_byte (board, SI2_ISA_IRQ12, SI2_ISA_IRQ12_SET);break; |
705 | case 15:write_sx_byte (board, SI2_ISA_IRQ15, SI2_ISA_IRQ15_SET);break; |
706 | default:printk (KERN_INFO "sx: SI/XIO card doesn't support interrupt %d.\n", |
707 | board->irq); |
708 | return 0; |
709 | } |
710 | write_sx_byte (board, SI2_ISA_INTCLEAR, SI2_ISA_INTCLEAR_SET); |
711 | } |
712 | |
713 | return 1; |
714 | } |
715 | |
716 | |
717 | static int sx_send_command (struct sx_port *port, |
718 | int command, int mask, int newstat) |
719 | { |
720 | func_enter2 (); |
721 | write_sx_byte (port->board, CHAN_OFFSET (port, hi_hstat), command); |
722 | func_exit (); |
723 | return sx_busy_wait_eq (port->board, CHAN_OFFSET (port, hi_hstat), mask, newstat); |
724 | } |
725 | |
726 | |
727 | static char *mod_type_s (int module_type) |
728 | { |
729 | switch (module_type) { |
730 | case TA4: return "TA4"; |
731 | case TA8: return "TA8"; |
732 | case TA4_ASIC: return "TA4_ASIC"; |
733 | case TA8_ASIC: return "TA8_ASIC"; |
734 | case MTA_CD1400:return "MTA_CD1400"; |
735 | case SXDC: return "SXDC"; |
736 | default:return "Unknown/invalid"; |
737 | } |
738 | } |
739 | |
740 | |
741 | static char *pan_type_s (int pan_type) |
742 | { |
743 | switch (pan_type) { |
744 | case MOD_RS232DB25: return "MOD_RS232DB25"; |
745 | case MOD_RS232RJ45: return "MOD_RS232RJ45"; |
746 | case MOD_RS422DB25: return "MOD_RS422DB25"; |
747 | case MOD_PARALLEL: return "MOD_PARALLEL"; |
748 | case MOD_2_RS232DB25: return "MOD_2_RS232DB25"; |
749 | case MOD_2_RS232RJ45: return "MOD_2_RS232RJ45"; |
750 | case MOD_2_RS422DB25: return "MOD_2_RS422DB25"; |
751 | case MOD_RS232DB25MALE: return "MOD_RS232DB25MALE"; |
752 | case MOD_2_PARALLEL: return "MOD_2_PARALLEL"; |
753 | case MOD_BLANK: return "empty"; |
754 | default:return "invalid"; |
755 | } |
756 | } |
757 | |
758 | |
759 | static int mod_compat_type (int module_type) |
760 | { |
761 | return module_type >> 4; |
762 | } |
763 | |
764 | static void sx_reconfigure_port(struct sx_port *port) |
765 | { |
766 | if (sx_read_channel_byte (port, hi_hstat) == HS_IDLE_OPEN) { |
767 | if (sx_send_command (port, HS_CONFIG, -1, HS_IDLE_OPEN) != 1) { |
768 | printk (KERN_WARNING "sx: Sent reconfigure command, but card didn't react.\n"); |
769 | } |
770 | } else { |
771 | sx_dprintk (SX_DEBUG_TERMIOS, |
772 | "sx: Not sending reconfigure: port isn't open (%02x).\n", |
773 | sx_read_channel_byte (port, hi_hstat)); |
774 | } |
775 | } |
776 | |
777 | static void sx_setsignals (struct sx_port *port, int dtr, int rts) |
778 | { |
779 | int t; |
780 | func_enter2 (); |
781 | |
782 | t = sx_read_channel_byte (port, hi_op); |
783 | if (dtr >= 0) t = dtr? (t | OP_DTR): (t & ~OP_DTR); |
784 | if (rts >= 0) t = rts? (t | OP_RTS): (t & ~OP_RTS); |
785 | sx_write_channel_byte (port, hi_op, t); |
786 | sx_dprintk (SX_DEBUG_MODEMSIGNALS, "setsignals: %d/%d\n", dtr, rts); |
787 | |
788 | func_exit (); |
789 | } |
790 | |
791 | |
792 | |
793 | static int sx_getsignals (struct sx_port *port) |
794 | { |
795 | int i_stat,o_stat; |
796 | |
797 | o_stat = sx_read_channel_byte (port, hi_op); |
798 | i_stat = sx_read_channel_byte (port, hi_ip); |
799 | |
800 | sx_dprintk (SX_DEBUG_MODEMSIGNALS, "getsignals: %d/%d (%d/%d) %02x/%02x\n", |
801 | (o_stat & OP_DTR) != 0, (o_stat & OP_RTS) != 0, |
802 | port->c_dcd, sx_get_CD (port), |
803 | sx_read_channel_byte (port, hi_ip), |
804 | sx_read_channel_byte (port, hi_state)); |
805 | |
806 | return (((o_stat & OP_DTR)?TIOCM_DTR:0) | |
807 | ((o_stat & OP_RTS)?TIOCM_RTS:0) | |
808 | ((i_stat & IP_CTS)?TIOCM_CTS:0) | |
809 | ((i_stat & IP_DCD)?TIOCM_CAR:0) | |
810 | ((i_stat & IP_DSR)?TIOCM_DSR:0) | |
811 | ((i_stat & IP_RI)?TIOCM_RNG:0) |
812 | ); |
813 | } |
814 | |
815 | |
816 | static void sx_set_baud (struct sx_port *port) |
817 | { |
818 | int t; |
819 | |
820 | if (port->board->ta_type == MOD_SXDC) { |
821 | switch (port->gs.baud) { |
822 | /* Save some typing work... */ |
823 | #define e(x) case x:t= BAUD_ ## x ; break |
824 | e(50);e(75);e(110);e(150);e(200);e(300);e(600); |
825 | e(1200);e(1800);e(2000);e(2400);e(4800);e(7200); |
826 | e(9600);e(14400);e(19200);e(28800);e(38400); |
827 | e(56000);e(57600);e(64000);e(76800);e(115200); |
828 | e(128000);e(150000);e(230400);e(256000);e(460800); |
829 | e(921600); |
830 | case 134 :t = BAUD_134_5; break; |
831 | case 0 :t = -1; |
832 | break; |
833 | default: |
834 | /* Can I return "invalid"? */ |
835 | t = BAUD_9600; |
836 | printk (KERN_INFO "sx: unsupported baud rate: %d.\n", port->gs.baud); |
837 | break; |
838 | } |
839 | #undef e |
840 | if (t > 0) { |
841 | /* The baud rate is not set to 0, so we're enabeling DTR... -- REW */ |
842 | sx_setsignals (port, 1, -1); |
843 | /* XXX This is not TA & MTA compatible */ |
844 | sx_write_channel_byte (port, hi_csr, 0xff); |
845 | |
846 | sx_write_channel_byte (port, hi_txbaud, t); |
847 | sx_write_channel_byte (port, hi_rxbaud, t); |
848 | } else { |
849 | sx_setsignals (port, 0, -1); |
850 | } |
851 | } else { |
852 | switch (port->gs.baud) { |
853 | #define e(x) case x:t= CSR_ ## x ; break |
854 | e(75);e(150);e(300);e(600);e(1200);e(2400);e(4800); |
855 | e(1800);e(9600); |
856 | e(19200);e(57600);e(38400); |
857 | /* TA supports 110, but not 115200, MTA supports 115200, but not 110 */ |
858 | case 110: |
859 | if (port->board->ta_type == MOD_TA) { |
860 | t = CSR_110; |
861 | break; |
862 | } else { |
863 | t = CSR_9600; |
864 | printk (KERN_INFO "sx: Unsupported baud rate: %d.\n", port->gs.baud); |
865 | break; |
866 | } |
867 | case 115200: |
868 | if (port->board->ta_type == MOD_TA) { |
869 | t = CSR_9600; |
870 | printk (KERN_INFO "sx: Unsupported baud rate: %d.\n", port->gs.baud); |
871 | break; |
872 | } else { |
873 | t = CSR_110; |
874 | break; |
875 | } |
876 | case 0 :t = -1; |
877 | break; |
878 | default: |
879 | t = CSR_9600; |
880 | printk (KERN_INFO "sx: Unsupported baud rate: %d.\n", port->gs.baud); |
881 | break; |
882 | } |
883 | #undef e |
884 | if (t >= 0) { |
885 | sx_setsignals (port, 1, -1); |
886 | sx_write_channel_byte (port, hi_csr, t * 0x11); |
887 | } else { |
888 | sx_setsignals (port, 0, -1); |
889 | } |
890 | } |
891 | } |
892 | |
893 | |
894 | /* Simon Allen's version of this routine was 225 lines long. 85 is a lot |
895 | better. -- REW */ |
896 | |
897 | static int sx_set_real_termios (void *ptr) |
898 | { |
899 | struct sx_port *port = ptr; |
900 | |
901 | func_enter2(); |
902 | |
903 | if (!port->gs.tty) |
904 | return 0; |
905 | |
906 | /* What is this doing here? -- REW |
907 | Ha! figured it out. It is to allow you to get DTR active again |
908 | if you've dropped it with stty 0. Moved to set_baud, where it |
909 | belongs (next to the drop dtr if baud == 0) -- REW */ |
910 | /* sx_setsignals (port, 1, -1); */ |
911 | |
912 | sx_set_baud (port); |
913 | |
914 | #define CFLAG port->gs.tty->termios->c_cflag |
915 | sx_write_channel_byte (port, hi_mr1, |
916 | (C_PARENB (port->gs.tty)? MR1_WITH:MR1_NONE) | |
917 | (C_PARODD (port->gs.tty)? MR1_ODD:MR1_EVEN) | |
918 | (C_CRTSCTS(port->gs.tty)? MR1_RTS_RXFLOW:0) | |
919 | (((CFLAG & CSIZE)==CS8) ? MR1_8_BITS:0) | |
920 | (((CFLAG & CSIZE)==CS7) ? MR1_7_BITS:0) | |
921 | (((CFLAG & CSIZE)==CS6) ? MR1_6_BITS:0) | |
922 | (((CFLAG & CSIZE)==CS5) ? MR1_5_BITS:0) ); |
923 | |
924 | sx_write_channel_byte (port, hi_mr2, |
925 | (C_CRTSCTS(port->gs.tty)?MR2_CTS_TXFLOW:0) | |
926 | (C_CSTOPB (port->gs.tty)?MR2_2_STOP:MR2_1_STOP)); |
927 | |
928 | switch (CFLAG & CSIZE) { |
929 | case CS8:sx_write_channel_byte (port, hi_mask, 0xff);break; |
930 | case CS7:sx_write_channel_byte (port, hi_mask, 0x7f);break; |
931 | case CS6:sx_write_channel_byte (port, hi_mask, 0x3f);break; |
932 | case CS5:sx_write_channel_byte (port, hi_mask, 0x1f);break; |
933 | default: |
934 | printk (KERN_INFO "sx: Invalid wordsize: %d\n", CFLAG & CSIZE); |
935 | break; |
936 | } |
937 | |
938 | sx_write_channel_byte (port, hi_prtcl, |
939 | (I_IXON (port->gs.tty)?SP_TXEN:0) | |
940 | (I_IXOFF (port->gs.tty)?SP_RXEN:0) | |
941 | (I_IXANY (port->gs.tty)?SP_TANY:0) | |
942 | SP_DCEN); |
943 | |
944 | sx_write_channel_byte (port, hi_break, |
945 | (I_IGNBRK(port->gs.tty)?BR_IGN:0 | |
946 | I_BRKINT(port->gs.tty)?BR_INT:0)); |
947 | |
948 | sx_write_channel_byte (port, hi_txon, START_CHAR (port->gs.tty)); |
949 | sx_write_channel_byte (port, hi_rxon, START_CHAR (port->gs.tty)); |
950 | sx_write_channel_byte (port, hi_txoff, STOP_CHAR (port->gs.tty)); |
951 | sx_write_channel_byte (port, hi_rxoff, STOP_CHAR (port->gs.tty)); |
952 | |
953 | sx_reconfigure_port(port); |
954 | |
955 | /* Tell line discipline whether we will do input cooking */ |
956 | if(I_OTHER(port->gs.tty)) { |
957 | clear_bit(TTY_HW_COOK_IN, &port->gs.tty->flags); |
958 | } else { |
959 | set_bit(TTY_HW_COOK_IN, &port->gs.tty->flags); |
960 | } |
961 | sx_dprintk (SX_DEBUG_TERMIOS, "iflags: %x(%d) ", |
962 | port->gs.tty->termios->c_iflag, |
963 | I_OTHER(port->gs.tty)); |
964 | |
965 | |
966 | /* Tell line discipline whether we will do output cooking. |
967 | * If OPOST is set and no other output flags are set then we can do output |
968 | * processing. Even if only *one* other flag in the O_OTHER group is set |
969 | * we do cooking in software. |
970 | */ |
971 | if(O_OPOST(port->gs.tty) && !O_OTHER(port->gs.tty)) { |
972 | set_bit(TTY_HW_COOK_OUT, &port->gs.tty->flags); |
973 | } else { |
974 | clear_bit(TTY_HW_COOK_OUT, &port->gs.tty->flags); |
975 | } |
976 | sx_dprintk (SX_DEBUG_TERMIOS, "oflags: %x(%d)\n", |
977 | port->gs.tty->termios->c_oflag, |
978 | O_OTHER(port->gs.tty)); |
979 | /* port->c_dcd = sx_get_CD (port); */ |
980 | func_exit (); |
981 | return 0; |
982 | } |
983 | |
984 | |
985 | |
986 | /* ********************************************************************** * |
987 | * the interrupt related routines * |
988 | * ********************************************************************** */ |
989 | |
990 | /* Note: |
991 | Other drivers use the macro "MIN" to calculate how much to copy. |
992 | This has the disadvantage that it will evaluate parts twice. That's |
993 | expensive when it's IO (and the compiler cannot optimize those away!). |
994 | Moreover, I'm not sure that you're race-free. |
995 | |
996 | I assign a value, and then only allow the value to decrease. This |
997 | is always safe. This makes the code a few lines longer, and you |
998 | know I'm dead against that, but I think it is required in this |
999 | case. */ |
1000 | |
1001 | |
1002 | static void sx_transmit_chars (struct sx_port *port) |
1003 | { |
1004 | int c; |
1005 | int tx_ip; |
1006 | int txroom; |
1007 | |
1008 | func_enter2 (); |
1009 | sx_dprintk (SX_DEBUG_TRANSMIT, "Port %p: transmit %d chars\n", |
1010 | port, port->gs.xmit_cnt); |
1011 | |
1012 | if (test_and_set_bit (SX_PORT_TRANSMIT_LOCK, &port->locks)) { |
1013 | return; |
1014 | } |
1015 | |
1016 | while (1) { |
1017 | c = port->gs.xmit_cnt; |
1018 | |
1019 | sx_dprintk (SX_DEBUG_TRANSMIT, "Copying %d ", c); |
1020 | tx_ip = sx_read_channel_byte (port, hi_txipos); |
1021 | |
1022 | /* Took me 5 minutes to deduce this formula. |
1023 | Luckily it is literally in the manual in section 6.5.4.3.5 */ |
1024 | txroom = (sx_read_channel_byte (port, hi_txopos) - tx_ip - 1) & 0xff; |
1025 | |
1026 | /* Don't copy more bytes than there is room for in the buffer */ |
1027 | if (c > txroom) |
1028 | c = txroom; |
1029 | sx_dprintk (SX_DEBUG_TRANSMIT, " %d(%d) ", c, txroom ); |
1030 | |
1031 | /* Don't copy past the end of the hardware transmit buffer */ |
1032 | if (c > 0x100 - tx_ip) |
1033 | c = 0x100 - tx_ip; |
1034 | |
1035 | sx_dprintk (SX_DEBUG_TRANSMIT, " %d(%d) ", c, 0x100-tx_ip ); |
1036 | |
1037 | /* Don't copy pas the end of the source buffer */ |
1038 | if (c > SERIAL_XMIT_SIZE - port->gs.xmit_tail) |
1039 | c = SERIAL_XMIT_SIZE - port->gs.xmit_tail; |
1040 | |
1041 | sx_dprintk (SX_DEBUG_TRANSMIT, " %d(%ld) \n", |
1042 | c, SERIAL_XMIT_SIZE- port->gs.xmit_tail); |
1043 | |
1044 | /* If for one reason or another, we can't copy more data, we're done! */ |
1045 | if (c == 0) break; |
1046 | |
1047 | |
1048 | memcpy_toio (port->board->base + CHAN_OFFSET(port,hi_txbuf) + tx_ip, |
1049 | port->gs.xmit_buf + port->gs.xmit_tail, c); |
1050 | |
1051 | /* Update the pointer in the card */ |
1052 | sx_write_channel_byte (port, hi_txipos, (tx_ip+c) & 0xff); |
1053 | |
1054 | /* Update the kernel buffer end */ |
1055 | port->gs.xmit_tail = (port->gs.xmit_tail + c) & (SERIAL_XMIT_SIZE-1); |
1056 | |
1057 | /* This one last. (this is essential) |
1058 | It would allow others to start putting more data into the buffer! */ |
1059 | port->gs.xmit_cnt -= c; |
1060 | } |
1061 | |
1062 | if (port->gs.xmit_cnt == 0) { |
1063 | sx_disable_tx_interrupts (port); |
1064 | } |
1065 | |
1066 | if ((port->gs.xmit_cnt <= port->gs.wakeup_chars) && port->gs.tty) { |
1067 | tty_wakeup(port->gs.tty); |
1068 | sx_dprintk (SX_DEBUG_TRANSMIT, "Waking up.... ldisc (%d)....\n", |
1069 | port->gs.wakeup_chars); |
1070 | } |
1071 | |
1072 | clear_bit (SX_PORT_TRANSMIT_LOCK, &port->locks); |
1073 | func_exit (); |
1074 | } |
1075 | |
1076 | |
1077 | /* Note the symmetry between receiving chars and transmitting them! |
1078 | Note: The kernel should have implemented both a receive buffer and |
1079 | a transmit buffer. */ |
1080 | |
1081 | /* Inlined: Called only once. Remove the inline when you add another call */ |
1082 | static inline void sx_receive_chars (struct sx_port *port) |
1083 | { |
1084 | int c; |
1085 | int rx_op; |
1086 | struct tty_struct *tty; |
1087 | int copied=0; |
1088 | |
1089 | func_enter2 (); |
1090 | tty = port->gs.tty; |
1091 | while (1) { |
1092 | rx_op = sx_read_channel_byte (port, hi_rxopos); |
1093 | c = (sx_read_channel_byte (port, hi_rxipos) - rx_op) & 0xff; |
1094 | |
1095 | sx_dprintk (SX_DEBUG_RECEIVE, "rxop=%d, c = %d.\n", rx_op, c); |
1096 | |
1097 | /* Don't copy more bytes than there is room for in the buffer */ |
1098 | if (tty->flip.count + c > TTY_FLIPBUF_SIZE) |
1099 | c = TTY_FLIPBUF_SIZE - tty->flip.count; |
1100 | |
1101 | sx_dprintk (SX_DEBUG_RECEIVE, "c = %d.\n", c); |
1102 | |
1103 | /* Don't copy past the end of the hardware receive buffer */ |
1104 | if (rx_op + c > 0x100) c = 0x100 - rx_op; |
1105 | |
1106 | sx_dprintk (SX_DEBUG_RECEIVE, "c = %d.\n", c); |
1107 | |
1108 | /* If for one reason or another, we can't copy more data, we're done! */ |
1109 | if (c == 0) break; |
1110 | |
1111 | sx_dprintk (SX_DEBUG_RECEIVE , "Copying over %d chars. First is %d at %lx\n", c, |
1112 | read_sx_byte (port->board, CHAN_OFFSET(port,hi_rxbuf) + rx_op), |
1113 | CHAN_OFFSET(port, hi_rxbuf)); |
1114 | memcpy_fromio (tty->flip.char_buf_ptr, |
1115 | port->board->base + CHAN_OFFSET(port,hi_rxbuf) + rx_op, c); |
1116 | memset(tty->flip.flag_buf_ptr, TTY_NORMAL, c); |
1117 | |
1118 | /* Update the kernel buffer end */ |
1119 | tty->flip.count += c; |
1120 | tty->flip.char_buf_ptr += c; |
1121 | tty->flip.flag_buf_ptr += c; |
1122 | |
1123 | /* This one last. ( Not essential.) |
1124 | It allows the card to start putting more data into the buffer! |
1125 | Update the pointer in the card */ |
1126 | sx_write_channel_byte (port, hi_rxopos, (rx_op + c) & 0xff); |
1127 | |
1128 | copied += c; |
1129 | } |
1130 | if (copied) { |
1131 | struct timeval tv; |
1132 | |
1133 | do_gettimeofday (&tv); |
1134 | sx_dprintk (SX_DEBUG_RECEIVE, |
1135 | "pushing flipq port %d (%3d chars): %d.%06d (%d/%d)\n", |
1136 | port->line, copied, |
1137 | (int) (tv.tv_sec % 60), (int)tv.tv_usec, tty->raw, tty->real_raw); |
1138 | |
1139 | /* Tell the rest of the system the news. Great news. New characters! */ |
1140 | tty_flip_buffer_push (tty); |
1141 | /* tty_schedule_flip (tty); */ |
1142 | } |
1143 | |
1144 | func_exit (); |
1145 | } |
1146 | |
1147 | /* Inlined: it is called only once. Remove the inline if you add another |
1148 | call */ |
1149 | static inline void sx_check_modem_signals (struct sx_port *port) |
1150 | { |
1151 | int hi_state; |
1152 | int c_dcd; |
1153 | |
1154 | hi_state = sx_read_channel_byte (port, hi_state); |
1155 | sx_dprintk (SX_DEBUG_MODEMSIGNALS, "Checking modem signals (%d/%d)\n", |
1156 | port->c_dcd, sx_get_CD (port)); |
1157 | |
1158 | if (hi_state & ST_BREAK) { |
1159 | hi_state &= ~ST_BREAK; |
1160 | sx_dprintk (SX_DEBUG_MODEMSIGNALS, "got a break.\n"); |
1161 | sx_write_channel_byte (port, hi_state, hi_state); |
1162 | gs_got_break (&port->gs); |
1163 | } |
1164 | if (hi_state & ST_DCD) { |
1165 | hi_state &= ~ST_DCD; |
1166 | sx_dprintk (SX_DEBUG_MODEMSIGNALS, "got a DCD change.\n"); |
1167 | sx_write_channel_byte (port, hi_state, hi_state); |
1168 | c_dcd = sx_get_CD (port); |
1169 | sx_dprintk (SX_DEBUG_MODEMSIGNALS, "DCD is now %d\n", c_dcd); |
1170 | if (c_dcd != port->c_dcd) { |
1171 | port->c_dcd = c_dcd; |
1172 | if (sx_get_CD (port)) { |
1173 | /* DCD went UP */ |
1174 | if ((sx_read_channel_byte(port, hi_hstat) != HS_IDLE_CLOSED) && |
1175 | !(port->gs.tty->termios->c_cflag & CLOCAL) ) { |
1176 | /* Are we blocking in open?*/ |
1177 | sx_dprintk (SX_DEBUG_MODEMSIGNALS, "DCD active, unblocking open\n"); |
1178 | wake_up_interruptible(&port->gs.open_wait); |
1179 | } else { |
1180 | sx_dprintk (SX_DEBUG_MODEMSIGNALS, "DCD raised. Ignoring.\n"); |
1181 | } |
1182 | } else { |
1183 | /* DCD went down! */ |
1184 | if (!(port->gs.tty->termios->c_cflag & CLOCAL) ) { |
1185 | sx_dprintk (SX_DEBUG_MODEMSIGNALS, "DCD dropped. hanging up....\n"); |
1186 | tty_hangup (port->gs.tty); |
1187 | } else { |
1188 | sx_dprintk (SX_DEBUG_MODEMSIGNALS, "DCD dropped. ignoring.\n"); |
1189 | } |
1190 | } |
1191 | } else { |
1192 | sx_dprintk (SX_DEBUG_MODEMSIGNALS, "Hmmm. card told us DCD changed, but it didn't.\n"); |
1193 | } |
1194 | } |
1195 | } |
1196 | |
1197 | |
1198 | /* This is what an interrupt routine should look like. |
1199 | * Small, elegant, clear. |
1200 | */ |
1201 | |
1202 | static irqreturn_t sx_interrupt (int irq, void *ptr, struct pt_regs *regs) |
1203 | { |
1204 | struct sx_board *board = ptr; |
1205 | struct sx_port *port; |
1206 | int i; |
1207 | |
1208 | func_enter (); |
1209 | sx_dprintk (SX_DEBUG_FLOW, "sx: enter sx_interrupt (%d/%d)\n", irq, board->irq); |
1210 | |
1211 | /* AAargh! The order in which to do these things is essential and |
1212 | not trivial. |
1213 | |
1214 | - Rate limit goes before "recursive". Otherwise a series of |
1215 | recursive calls will hang the machine in the interrupt routine. |
1216 | |
1217 | - hardware twiddling goes before "recursive". Otherwise when we |
1218 | poll the card, and a recursive interrupt happens, we won't |
1219 | ack the card, so it might keep on interrupting us. (especially |
1220 | level sensitive interrupt systems like PCI). |
1221 | |
1222 | - Rate limit goes before hardware twiddling. Otherwise we won't |
1223 | catch a card that has gone bonkers. |
1224 | |
1225 | - The "initialized" test goes after the hardware twiddling. Otherwise |
1226 | the card will stick us in the interrupt routine again. |
1227 | |
1228 | - The initialized test goes before recursive. |
1229 | */ |
1230 | |
1231 | |
1232 | |
1233 | #ifdef IRQ_RATE_LIMIT |
1234 | /* Aaargh! I'm ashamed. This costs more lines-of-code than the |
1235 | actual interrupt routine!. (Well, used to when I wrote that comment) */ |
1236 | { |
1237 | static int lastjif; |
1238 | static int nintr=0; |
1239 | |
1240 | if (lastjif == jiffies) { |
1241 | if (++nintr > IRQ_RATE_LIMIT) { |
1242 | free_irq (board->irq, board); |
1243 | printk (KERN_ERR "sx: Too many interrupts. Turning off interrupt %d.\n", |
1244 | board->irq); |
1245 | } |
1246 | } else { |
1247 | lastjif = jiffies; |
1248 | nintr = 0; |
1249 | } |
1250 | } |
1251 | #endif |
1252 | |
1253 | |
1254 | if (board->irq == irq) { |
1255 | /* Tell the card we've noticed the interrupt. */ |
1256 | |
1257 | sx_write_board_word (board, cc_int_pending, 0); |
1258 | if (IS_SX_BOARD (board)) { |
1259 | write_sx_byte (board, SX_RESET_IRQ, 1); |
1260 | } else if (IS_EISA_BOARD(board)) { |
1261 | inb(board->eisa_base+0xc03); |
1262 | write_sx_word(board, 8, 0); |
1263 | } else { |
1264 | write_sx_byte (board, SI2_ISA_INTCLEAR, SI2_ISA_INTCLEAR_CLEAR); |
1265 | write_sx_byte (board, SI2_ISA_INTCLEAR, SI2_ISA_INTCLEAR_SET); |
1266 | } |
1267 | } |
1268 | |
1269 | if (!sx_initialized) |
1270 | return IRQ_HANDLED; |
1271 | if (!(board->flags & SX_BOARD_INITIALIZED)) |
1272 | return IRQ_HANDLED; |
1273 | |
1274 | if (test_and_set_bit (SX_BOARD_INTR_LOCK, &board->locks)) { |
1275 | printk (KERN_ERR "Recursive interrupt! (%d)\n", board->irq); |
1276 | return IRQ_HANDLED; |
1277 | } |
1278 | |
1279 | for (i=0;i<board->nports;i++) { |
1280 | port = &board->ports[i]; |
1281 | if (port->gs.flags & GS_ACTIVE) { |
1282 | if (sx_read_channel_byte (port, hi_state)) { |
1283 | sx_dprintk (SX_DEBUG_INTERRUPTS, |
1284 | "Port %d: modem signal change?... \n", i); |
1285 | sx_check_modem_signals (port); |
1286 | } |
1287 | if (port->gs.xmit_cnt) { |
1288 | sx_transmit_chars (port); |
1289 | } |
1290 | if (!(port->gs.flags & SX_RX_THROTTLE)) { |
1291 | sx_receive_chars (port); |
1292 | } |
1293 | } |
1294 | } |
1295 | |
1296 | clear_bit (SX_BOARD_INTR_LOCK, &board->locks); |
1297 | |
1298 | sx_dprintk (SX_DEBUG_FLOW, "sx: exit sx_interrupt (%d/%d)\n", irq, board->irq); |
1299 | func_exit (); |
1300 | return IRQ_HANDLED; |
1301 | } |
1302 | |
1303 | |
1304 | static void sx_pollfunc (unsigned long data) |
1305 | { |
1306 | struct sx_board *board = (struct sx_board *) data; |
1307 | |
1308 | func_enter (); |
1309 | |
1310 | sx_interrupt (0, board, NULL); |
1311 | |
1312 | init_timer(&board->timer); |
1313 | |
1314 | board->timer.expires = jiffies + sx_poll; |
1315 | add_timer (&board->timer); |
1316 | func_exit (); |
1317 | } |
1318 | |
1319 | |
1320 | |
1321 | /* ********************************************************************** * |
1322 | * Here are the routines that actually * |
1323 | * interface with the generic_serial driver * |
1324 | * ********************************************************************** */ |
1325 | |
1326 | /* Ehhm. I don't know how to fiddle with interrupts on the SX card. --REW */ |
1327 | /* Hmm. Ok I figured it out. You don't. */ |
1328 | |
1329 | static void sx_disable_tx_interrupts (void * ptr) |
1330 | { |
1331 | struct sx_port *port = ptr; |
1332 | func_enter2(); |
1333 | |
1334 | port->gs.flags &= ~GS_TX_INTEN; |
1335 | |
1336 | func_exit(); |
1337 | } |
1338 | |
1339 | |
1340 | static void sx_enable_tx_interrupts (void * ptr) |
1341 | { |
1342 | struct sx_port *port = ptr; |
1343 | int data_in_buffer; |
1344 | func_enter2(); |
1345 | |
1346 | /* First transmit the characters that we're supposed to */ |
1347 | sx_transmit_chars (port); |
1348 | |
1349 | /* The sx card will never interrupt us if we don't fill the buffer |
1350 | past 25%. So we keep considering interrupts off if that's the case. */ |
1351 | data_in_buffer = (sx_read_channel_byte (port, hi_txipos) - |
1352 | sx_read_channel_byte (port, hi_txopos)) & 0xff; |
1353 | |
1354 | /* XXX Must be "HIGH_WATER" for SI card according to doc. */ |
1355 | if (data_in_buffer < LOW_WATER) |
1356 | port->gs.flags &= ~GS_TX_INTEN; |
1357 | |
1358 | func_exit(); |
1359 | } |
1360 | |
1361 | |
1362 | static void sx_disable_rx_interrupts (void * ptr) |
1363 | { |
1364 | /* struct sx_port *port = ptr; */ |
1365 | func_enter(); |
1366 | |
1367 | func_exit(); |
1368 | } |
1369 | |
1370 | static void sx_enable_rx_interrupts (void * ptr) |
1371 | { |
1372 | /* struct sx_port *port = ptr; */ |
1373 | func_enter(); |
1374 | |
1375 | func_exit(); |
1376 | } |
1377 | |
1378 | |
1379 | /* Jeez. Isn't this simple? */ |
1380 | static int sx_get_CD (void * ptr) |
1381 | { |
1382 | struct sx_port *port = ptr; |
1383 | func_enter2(); |
1384 | |
1385 | func_exit(); |
1386 | return ((sx_read_channel_byte (port, hi_ip) & IP_DCD) != 0); |
1387 | } |
1388 | |
1389 | |
1390 | /* Jeez. Isn't this simple? */ |
1391 | static int sx_chars_in_buffer (void * ptr) |
1392 | { |
1393 | struct sx_port *port = ptr; |
1394 | func_enter2(); |
1395 | |
1396 | func_exit(); |
1397 | return ((sx_read_channel_byte (port, hi_txipos) - |
1398 | sx_read_channel_byte (port, hi_txopos)) & 0xff); |
1399 | } |
1400 | |
1401 | |
1402 | static void sx_shutdown_port (void * ptr) |
1403 | { |
1404 | struct sx_port *port = ptr; |
1405 | |
1406 | func_enter(); |
1407 | |
1408 | port->gs.flags &= ~ GS_ACTIVE; |
1409 | if (port->gs.tty && (port->gs.tty->termios->c_cflag & HUPCL)) { |
1410 | sx_setsignals (port, 0, 0); |
1411 | sx_reconfigure_port(port); |
1412 | } |
1413 | |
1414 | func_exit(); |
1415 | } |
1416 | |
1417 | |
1418 | |
1419 | |
1420 | |
1421 | /* ********************************************************************** * |
1422 | * Here are the routines that actually * |
1423 | * interface with the rest of the system * |
1424 | * ********************************************************************** */ |
1425 | |
1426 | static int sx_open (struct tty_struct * tty, struct file * filp) |
1427 | { |
1428 | struct sx_port *port; |
1429 | int retval, line; |
1430 | unsigned long flags; |
1431 | |
1432 | func_enter(); |
1433 | |
1434 | if (!sx_initialized) { |
1435 | return -EIO; |
1436 | } |
1437 | |
1438 | line = tty->index; |
1439 | sx_dprintk (SX_DEBUG_OPEN, "%d: opening line %d. tty=%p ctty=%p, np=%d)\n", |
1440 | current->pid, line, tty, current->signal->tty, sx_nports); |
1441 | |
1442 | if ((line < 0) || (line >= SX_NPORTS) || (line >= sx_nports)) |
1443 | return -ENODEV; |
1444 | |
1445 | port = & sx_ports[line]; |
1446 | port->c_dcd = 0; /* Make sure that the first interrupt doesn't detect a |
1447 | 1 -> 0 transition. */ |
1448 | |
1449 | |
1450 | sx_dprintk (SX_DEBUG_OPEN, "port = %p c_dcd = %d\n", port, port->c_dcd); |
1451 | |
1452 | spin_lock_irqsave(&port->gs.driver_lock, flags); |
1453 | |
1454 | tty->driver_data = port; |
1455 | port->gs.tty = tty; |
1456 | port->gs.count++; |
1457 | spin_unlock_irqrestore(&port->gs.driver_lock, flags); |
1458 | |
1459 | sx_dprintk (SX_DEBUG_OPEN, "starting port\n"); |
1460 | |
1461 | /* |
1462 | * Start up serial port |
1463 | */ |
1464 | retval = gs_init_port(&port->gs); |
1465 | sx_dprintk (SX_DEBUG_OPEN, "done gs_init\n"); |
1466 | if (retval) { |
1467 | port->gs.count--; |
1468 | return retval; |
1469 | } |
1470 | |
1471 | port->gs.flags |= GS_ACTIVE; |
1472 | if (port->gs.count <= 1) |
1473 | sx_setsignals (port, 1,1); |
1474 | |
1475 | #if 0 |
1476 | if (sx_debug & SX_DEBUG_OPEN) |
1477 | my_hd (port, sizeof (*port)); |
1478 | #else |
1479 | if (sx_debug & SX_DEBUG_OPEN) |
1480 | my_hd_io (port->board->base + port->ch_base, sizeof (*port)); |
1481 | #endif |
1482 | |
1483 | if (port->gs.count <= 1) { |
1484 | if (sx_send_command (port, HS_LOPEN, -1, HS_IDLE_OPEN) != 1) { |
1485 | printk (KERN_ERR "sx: Card didn't respond to LOPEN command.\n"); |
1486 | spin_lock_irqsave(&port->gs.driver_lock, flags); |
1487 | port->gs.count--; |
1488 | spin_unlock_irqrestore(&port->gs.driver_lock, flags); |
1489 | return -EIO; |
1490 | } |
1491 | } |
1492 | |
1493 | retval = gs_block_til_ready(port, filp); |
1494 | sx_dprintk (SX_DEBUG_OPEN, "Block til ready returned %d. Count=%d\n", |
1495 | retval, port->gs.count); |
1496 | |
1497 | if (retval) { |
1498 | /* |
1499 | * Don't lower gs.count here because sx_close() will be called later |
1500 | */ |
1501 | |
1502 | return retval; |
1503 | } |
1504 | /* tty->low_latency = 1; */ |
1505 | |
1506 | port->c_dcd = sx_get_CD (port); |
1507 | sx_dprintk (SX_DEBUG_OPEN, "at open: cd=%d\n", port->c_dcd); |
1508 | |
1509 | func_exit(); |
1510 | return 0; |
1511 | |
1512 | } |
1513 | |
1514 | |
1515 | static void sx_close (void *ptr) |
1516 | { |
1517 | struct sx_port *port = ptr; |
1518 | /* Give the port 5 seconds to close down. */ |
1519 | int to = 5 * HZ; |
1520 | |
1521 | func_enter (); |
1522 | |
1523 | sx_setsignals (port, 0, 0); |
1524 | sx_reconfigure_port(port); |
1525 | sx_send_command (port, HS_CLOSE, 0, 0); |
1526 | |
1527 | while (to-- && (sx_read_channel_byte (port, hi_hstat) != HS_IDLE_CLOSED)) |
1528 | if (msleep_interruptible(10)) |
1529 | break; |
1530 | if (sx_read_channel_byte (port, hi_hstat) != HS_IDLE_CLOSED) { |
1531 | if (sx_send_command (port, HS_FORCE_CLOSED, -1, HS_IDLE_CLOSED) != 1) { |
1532 | printk (KERN_ERR |
1533 | "sx: sent the force_close command, but card didn't react\n"); |
1534 | } else |
1535 | sx_dprintk (SX_DEBUG_CLOSE, "sent the force_close command.\n"); |
1536 | } |
1537 | |
1538 | sx_dprintk (SX_DEBUG_CLOSE, "waited %d jiffies for close. count=%d\n", |
1539 | 5 * HZ - to - 1, port->gs.count); |
1540 | |
1541 | if(port->gs.count) { |
1542 | sx_dprintk(SX_DEBUG_CLOSE, "WARNING port count:%d\n", port->gs.count); |
1543 | //printk ("%s SETTING port count to zero: %p count: %d\n", __FUNCTION__, port, port->gs.count); |
1544 | //port->gs.count = 0; |
1545 | } |
1546 | |
1547 | func_exit (); |
1548 | } |
1549 | |
1550 | |
1551 | |
1552 | /* This is relatively thorough. But then again it is only 20 lines. */ |
1553 | #define MARCHUP for (i=min;i<max;i++) |
1554 | #define MARCHDOWN for (i=max-1;i>=min;i--) |
1555 | #define W0 write_sx_byte (board, i, 0x55) |
1556 | #define W1 write_sx_byte (board, i, 0xaa) |
1557 | #define R0 if (read_sx_byte (board, i) != 0x55) return 1 |
1558 | #define R1 if (read_sx_byte (board, i) != 0xaa) return 1 |
1559 | |
1560 | /* This memtest takes a human-noticable time. You normally only do it |
1561 | once a boot, so I guess that it is worth it. */ |
1562 | static int do_memtest (struct sx_board *board, int min, int max) |
1563 | { |
1564 | int i; |
1565 | |
1566 | /* This is a marchb. Theoretically, marchb catches much more than |
1567 | simpler tests. In practise, the longer test just catches more |
1568 | intermittent errors. -- REW |
1569 | (For the theory behind memory testing see: |
1570 | Testing Semiconductor Memories by A.J. van de Goor.) */ |
1571 | MARCHUP {W0;} |
1572 | MARCHUP {R0;W1;R1;W0;R0;W1;} |
1573 | MARCHUP {R1;W0;W1;} |
1574 | MARCHDOWN {R1;W0;W1;W0;} |
1575 | MARCHDOWN {R0;W1;W0;} |
1576 | |
1577 | return 0; |
1578 | } |
1579 | |
1580 | |
1581 | #undef MARCHUP |
1582 | #undef MARCHDOWN |
1583 | #undef W0 |
1584 | #undef W1 |
1585 | #undef R0 |
1586 | #undef R1 |
1587 | |
1588 | #define MARCHUP for (i=min;i<max;i+=2) |
1589 | #define MARCHDOWN for (i=max-1;i>=min;i-=2) |
1590 | #define W0 write_sx_word (board, i, 0x55aa) |
1591 | #define W1 write_sx_word (board, i, 0xaa55) |
1592 | #define R0 if (read_sx_word (board, i) != 0x55aa) return 1 |
1593 | #define R1 if (read_sx_word (board, i) != 0xaa55) return 1 |
1594 | |
1595 | #if 0 |
1596 | /* This memtest takes a human-noticable time. You normally only do it |
1597 | once a boot, so I guess that it is worth it. */ |
1598 | static int do_memtest_w (struct sx_board *board, int min, int max) |
1599 | { |
1600 | int i; |
1601 | |
1602 | MARCHUP {W0;} |
1603 | MARCHUP {R0;W1;R1;W0;R0;W1;} |
1604 | MARCHUP {R1;W0;W1;} |
1605 | MARCHDOWN {R1;W0;W1;W0;} |
1606 | MARCHDOWN {R0;W1;W0;} |
1607 | |
1608 | return 0; |
1609 | } |
1610 | #endif |
1611 | |
1612 | |
1613 | static int sx_fw_ioctl (struct inode *inode, struct file *filp, |
1614 | unsigned int cmd, unsigned long arg) |
1615 | { |
1616 | int rc = 0; |
1617 | int __user *descr = (int __user *)arg; |
1618 | int i; |
1619 | static struct sx_board *board = NULL; |
1620 | int nbytes, offset; |
1621 | unsigned long data; |
1622 | char *tmp; |
1623 | |
1624 | func_enter(); |
1625 | |
1626 | #if 0 |
1627 | /* Removed superuser check: Sysops can use the permissions on the device |
1628 | file to restrict access. Recommendation: Root only. (root.root 600) */ |
1629 | if (!capable(CAP_SYS_ADMIN)) { |
1630 | return -EPERM; |
1631 | } |
1632 | #endif |
1633 | |
1634 | sx_dprintk (SX_DEBUG_FIRMWARE, "IOCTL %x: %lx\n", cmd, arg); |
1635 | |
1636 | if (!board) board = &boards[0]; |
1637 | if (board->flags & SX_BOARD_PRESENT) { |
1638 | sx_dprintk (SX_DEBUG_FIRMWARE, "Board present! (%x)\n", |
1639 | board->flags); |
1640 | } else { |
1641 | sx_dprintk (SX_DEBUG_FIRMWARE, "Board not present! (%x) all:", |
1642 | board->flags); |
1643 | for (i=0;i< SX_NBOARDS;i++) |
1644 | sx_dprintk (SX_DEBUG_FIRMWARE, "<%x> ", boards[i].flags); |
1645 | sx_dprintk (SX_DEBUG_FIRMWARE, "\n"); |
1646 | return -EIO; |
1647 | } |
1648 | |
1649 | switch (cmd) { |
1650 | case SXIO_SET_BOARD: |
1651 | sx_dprintk (SX_DEBUG_FIRMWARE, "set board to %ld\n", arg); |
1652 | if (arg >= SX_NBOARDS) return -EIO; |
1653 | sx_dprintk (SX_DEBUG_FIRMWARE, "not out of range\n"); |
1654 | if (!(boards[arg].flags & SX_BOARD_PRESENT)) return -EIO; |
1655 | sx_dprintk (SX_DEBUG_FIRMWARE, ".. and present!\n"); |
1656 | board = &boards[arg]; |
1657 | break; |
1658 | case SXIO_GET_TYPE: |
1659 | rc = -ENOENT; /* If we manage to miss one, return error. */ |
1660 | if (IS_SX_BOARD (board)) rc = SX_TYPE_SX; |
1661 | if (IS_CF_BOARD (board)) rc = SX_TYPE_CF; |
1662 | if (IS_SI_BOARD (board)) rc = SX_TYPE_SI; |
1663 | if (IS_SI1_BOARD (board)) rc = SX_TYPE_SI; |
1664 | if (IS_EISA_BOARD (board)) rc = SX_TYPE_SI; |
1665 | sx_dprintk (SX_DEBUG_FIRMWARE, "returning type= %d\n", rc); |
1666 | break; |
1667 | case SXIO_DO_RAMTEST: |
1668 | if (sx_initialized) /* Already initialized: better not ramtest the board. */ |
1669 | return -EPERM; |
1670 | if (IS_SX_BOARD (board)) { |
1671 | rc = do_memtest (board, 0, 0x7000); |
1672 | if (!rc) rc = do_memtest (board, 0, 0x7000); |
1673 | /*if (!rc) rc = do_memtest_w (board, 0, 0x7000);*/ |
1674 | } else { |
1675 | rc = do_memtest (board, 0, 0x7ff8); |
1676 | /* if (!rc) rc = do_memtest_w (board, 0, 0x7ff8); */ |
1677 | } |
1678 | sx_dprintk (SX_DEBUG_FIRMWARE, "returning memtest result= %d\n", rc); |
1679 | break; |
1680 | case SXIO_DOWNLOAD: |
1681 | if (sx_initialized) /* Already initialized */ |
1682 | return -EEXIST; |
1683 | if (!sx_reset (board)) |
1684 | return -EIO; |
1685 | sx_dprintk (SX_DEBUG_INIT, "reset the board...\n"); |
1686 | |
1687 | tmp = kmalloc (SX_CHUNK_SIZE, GFP_USER); |
1688 | if (!tmp) return -ENOMEM; |
1689 | get_user (nbytes, descr++); |
1690 | get_user (offset, descr++); |
1691 | get_user (data, descr++); |
1692 | while (nbytes && data) { |
1693 | for (i=0;i<nbytes;i += SX_CHUNK_SIZE) { |
1694 | if (copy_from_user(tmp, (char __user *)data+i, |
1695 | (i + SX_CHUNK_SIZE > |
1696 | nbytes) ? nbytes - i : |
1697 | SX_CHUNK_SIZE)) { |
1698 | kfree (tmp); |
1699 | return -EFAULT; |
1700 | } |
1701 | memcpy_toio(board->base2 + offset + i, tmp, |
1702 | (i+SX_CHUNK_SIZE>nbytes)?nbytes-i:SX_CHUNK_SIZE); |
1703 | } |
1704 | |
1705 | get_user (nbytes, descr++); |
1706 | get_user (offset, descr++); |
1707 | get_user (data, descr++); |
1708 | } |
1709 | kfree (tmp); |
1710 | sx_nports += sx_init_board (board); |
1711 | rc = sx_nports; |
1712 | break; |
1713 | case SXIO_INIT: |
1714 | if (sx_initialized) /* Already initialized */ |
1715 | return -EEXIST; |
1716 | /* This is not allowed until all boards are initialized... */ |
1717 | for (i=0;i<SX_NBOARDS;i++) { |
1718 | if ( (boards[i].flags & SX_BOARD_PRESENT) && |
1719 | !(boards[i].flags & SX_BOARD_INITIALIZED)) |
1720 | return -EIO; |
1721 | } |
1722 | for (i=0;i<SX_NBOARDS;i++) |
1723 | if (!(boards[i].flags & SX_BOARD_PRESENT)) break; |
1724 | |
1725 | sx_dprintk (SX_DEBUG_FIRMWARE, "initing portstructs, %d boards, " |
1726 | "%d channels, first board: %d ports\n", |
1727 | i, sx_nports, boards[0].nports); |
1728 | rc = sx_init_portstructs (i, sx_nports); |
1729 | sx_init_drivers (); |
1730 | if (rc >= 0) |
1731 | sx_initialized++; |
1732 | break; |
1733 | case SXIO_SETDEBUG: |
1734 | sx_debug = arg; |
1735 | break; |
1736 | case SXIO_GETDEBUG: |
1737 | rc = sx_debug; |
1738 | break; |
1739 | case SXIO_GETGSDEBUG: |
1740 | case SXIO_SETGSDEBUG: |
1741 | rc = -EINVAL; |
1742 | break; |
1743 | case SXIO_GETNPORTS: |
1744 | rc = sx_nports; |
1745 | break; |
1746 | default: |
1747 | printk (KERN_WARNING "Unknown ioctl on firmware device (%x).\n", cmd); |
1748 | break; |
1749 | } |
1750 | func_exit (); |
1751 | return rc; |
1752 | } |
1753 | |
1754 | |
1755 | static void sx_break (struct tty_struct * tty, int flag) |
1756 | { |
1757 | struct sx_port *port = tty->driver_data; |
1758 | int rv; |
1759 | |
1760 | func_enter (); |
1761 | |
1762 | if (flag) |
1763 | rv = sx_send_command (port, HS_START, -1, HS_IDLE_BREAK); |
1764 | else |
1765 | rv = sx_send_command (port, HS_STOP, -1, HS_IDLE_OPEN); |
1766 | if (rv != 1) printk (KERN_ERR "sx: couldn't send break (%x).\n", |
1767 | read_sx_byte (port->board, CHAN_OFFSET (port, hi_hstat))); |
1768 | |
1769 | func_exit (); |
1770 | } |
1771 | |
1772 | |
1773 | static int sx_tiocmget(struct tty_struct *tty, struct file *file) |
1774 | { |
1775 | struct sx_port *port = tty->driver_data; |
1776 | return sx_getsignals(port); |
1777 | } |
1778 | |
1779 | static int sx_tiocmset(struct tty_struct *tty, struct file *file, |
1780 | unsigned int set, unsigned int clear) |
1781 | { |
1782 | struct sx_port *port = tty->driver_data; |
1783 | int rts = -1, dtr = -1; |
1784 | |
1785 | if (set & TIOCM_RTS) |
1786 | rts = 1; |
1787 | if (set & TIOCM_DTR) |
1788 | dtr = 1; |
1789 | if (clear & TIOCM_RTS) |
1790 | rts = 0; |
1791 | if (clear & TIOCM_DTR) |
1792 | dtr = 0; |
1793 | |
1794 | sx_setsignals(port, dtr, rts); |
1795 | sx_reconfigure_port(port); |
1796 | return 0; |
1797 | } |
1798 | |
1799 | static int sx_ioctl (struct tty_struct * tty, struct file * filp, |
1800 | unsigned int cmd, unsigned long arg) |
1801 | { |
1802 | int rc; |
1803 | struct sx_port *port = tty->driver_data; |
1804 | void __user *argp = (void __user *)arg; |
1805 | int ival; |
1806 | |
1807 | /* func_enter2(); */ |
1808 | |
1809 | rc = 0; |
1810 | switch (cmd) { |
1811 | case TIOCGSOFTCAR: |
1812 | rc = put_user(((tty->termios->c_cflag & CLOCAL) ? 1 : 0), |
1813 | (unsigned __user *) argp); |
1814 | break; |
1815 | case TIOCSSOFTCAR: |
1816 | if ((rc = get_user(ival, (unsigned __user *) argp)) == 0) { |
1817 | tty->termios->c_cflag = |
1818 | (tty->termios->c_cflag & ~CLOCAL) | |
1819 | (ival ? CLOCAL : 0); |
1820 | } |
1821 | break; |
1822 | case TIOCGSERIAL: |
1823 | rc = gs_getserial(&port->gs, argp); |
1824 | break; |
1825 | case TIOCSSERIAL: |
1826 | rc = gs_setserial(&port->gs, argp); |
1827 | break; |
1828 | default: |
1829 | rc = -ENOIOCTLCMD; |
1830 | break; |
1831 | } |
1832 | |
1833 | /* func_exit(); */ |
1834 | return rc; |
1835 | } |
1836 | |
1837 | |
1838 | /* The throttle/unthrottle scheme for the Specialix card is different |
1839 | * from other drivers and deserves some explanation. |
1840 | * The Specialix hardware takes care of XON/XOFF |
1841 | * and CTS/RTS flow control itself. This means that all we have to |
1842 | * do when signalled by the upper tty layer to throttle/unthrottle is |
1843 | * to make a note of it here. When we come to read characters from the |
1844 | * rx buffers on the card (sx_receive_chars()) we look to see if the |
1845 | * upper layer can accept more (as noted here in sx_rx_throt[]). |
1846 | * If it can't we simply don't remove chars from the cards buffer. |
1847 | * When the tty layer can accept chars, we again note that here and when |
1848 | * sx_receive_chars() is called it will remove them from the cards buffer. |
1849 | * The card will notice that a ports buffer has drained below some low |
1850 | * water mark and will unflow control the line itself, using whatever |
1851 | * flow control scheme is in use for that port. -- Simon Allen |
1852 | */ |
1853 | |
1854 | static void sx_throttle (struct tty_struct * tty) |
1855 | { |
1856 | struct sx_port *port = (struct sx_port *)tty->driver_data; |
1857 | |
1858 | func_enter2(); |
1859 | /* If the port is using any type of input flow |
1860 | * control then throttle the port. |
1861 | */ |
1862 | if((tty->termios->c_cflag & CRTSCTS) || (I_IXOFF(tty)) ) { |
1863 | port->gs.flags |= SX_RX_THROTTLE; |
1864 | } |
1865 | func_exit(); |
1866 | } |
1867 | |
1868 | |
1869 | static void sx_unthrottle (struct tty_struct * tty) |
1870 | { |
1871 | struct sx_port *port = (struct sx_port *)tty->driver_data; |
1872 | |
1873 | func_enter2(); |
1874 | /* Always unthrottle even if flow control is not enabled on |
1875 | * this port in case we disabled flow control while the port |
1876 | * was throttled |
1877 | */ |
1878 | port->gs.flags &= ~SX_RX_THROTTLE; |
1879 | func_exit(); |
1880 | return; |
1881 | } |
1882 | |
1883 | |
1884 | /* ********************************************************************** * |
1885 | * Here are the initialization routines. * |
1886 | * ********************************************************************** */ |
1887 | |
1888 | |
1889 | |
1890 | |
1891 | static int sx_init_board (struct sx_board *board) |
1892 | { |
1893 | int addr; |
1894 | int chans; |
1895 | int type; |
1896 | |
1897 | func_enter(); |
1898 | |
1899 | /* This is preceded by downloading the download code. */ |
1900 | |
1901 | board->flags |= SX_BOARD_INITIALIZED; |
1902 | |
1903 | if (read_sx_byte (board, 0)) |
1904 | /* CF boards may need this. */ |
1905 | write_sx_byte(board,0, 0); |
1906 | |
1907 | /* This resets the processor again, to make sure it didn't do any |
1908 | foolish things while we were downloading the image */ |
1909 | if (!sx_reset (board)) |
1910 | return 0; |
1911 | |
1912 | sx_start_board (board); |
1913 | udelay (10); |
1914 | if (!sx_busy_wait_neq (board, 0, 0xff, 0)) { |
1915 | printk (KERN_ERR "sx: Ooops. Board won't initialize.\n"); |
1916 | return 0; |
1917 | } |
1918 | |
1919 | /* Ok. So now the processor on the card is running. It gathered |
1920 | some info for us... */ |
1921 | sx_dprintk (SX_DEBUG_INIT, "The sxcard structure:\n"); |
1922 | if (sx_debug & SX_DEBUG_INIT) my_hd_io (board->base, 0x10); |
1923 | sx_dprintk (SX_DEBUG_INIT, "the first sx_module structure:\n"); |
1924 | if (sx_debug & SX_DEBUG_INIT) my_hd_io (board->base + 0x80, 0x30); |
1925 | |
1926 | sx_dprintk (SX_DEBUG_INIT, |
1927 | "init_status: %x, %dk memory, firmware V%x.%02x,\n", |
1928 | read_sx_byte (board, 0), read_sx_byte(board, 1), |
1929 | read_sx_byte (board, 5), read_sx_byte(board, 4)); |
1930 | |
1931 | if (read_sx_byte (board, 0) == 0xff) { |
1932 | printk (KERN_INFO "sx: No modules found. Sorry.\n"); |
1933 | board->nports = 0; |
1934 | return 0; |
1935 | } |
1936 | |
1937 | chans = 0; |
1938 | |
1939 | if (IS_SX_BOARD(board)) { |
1940 | sx_write_board_word (board, cc_int_count, sx_maxints); |
1941 | } else { |
1942 | if (sx_maxints) |
1943 | sx_write_board_word (board, cc_int_count, SI_PROCESSOR_CLOCK/8/sx_maxints); |
1944 | } |
1945 | |
1946 | /* grab the first module type... */ |
1947 | /* board->ta_type = mod_compat_type (read_sx_byte (board, 0x80 + 0x08)); */ |
1948 | board->ta_type = mod_compat_type (sx_read_module_byte (board, 0x80, mc_chip)); |
1949 | |
1950 | /* XXX byteorder */ |
1951 | for (addr = 0x80;addr != 0;addr = read_sx_word (board, addr) & 0x7fff) { |
1952 | type = sx_read_module_byte (board, addr, mc_chip); |
1953 | sx_dprintk (SX_DEBUG_INIT, "Module at %x: %d channels\n", |
1954 | addr, read_sx_byte (board, addr + 2)); |
1955 | |
1956 | chans += sx_read_module_byte (board, addr, mc_type); |
1957 | |
1958 | sx_dprintk (SX_DEBUG_INIT, "module is an %s, which has %s/%s panels\n", |
1959 | mod_type_s (type), |
1960 | pan_type_s (sx_read_module_byte (board, addr, mc_mods) & 0xf), |
1961 | pan_type_s (sx_read_module_byte (board, addr, mc_mods) >> 4)); |
1962 | |
1963 | sx_dprintk (SX_DEBUG_INIT, "CD1400 versions: %x/%x, ASIC version: %x\n", |
1964 | sx_read_module_byte (board, addr, mc_rev1), |
1965 | sx_read_module_byte (board, addr, mc_rev2), |
1966 | sx_read_module_byte (board, addr, mc_mtaasic_rev)); |
1967 | |
1968 | /* The following combinations are illegal: It should theoretically |
1969 | work, but timing problems make the bus HANG. */ |
1970 | |
1971 | if (mod_compat_type (type) != board->ta_type) { |
1972 | printk (KERN_ERR "sx: This is an invalid configuration.\n" |
1973 | "Don't mix TA/MTA/SXDC on the same hostadapter.\n"); |
1974 | chans=0; |
1975 | break; |
1976 | } |
1977 | if ((IS_EISA_BOARD(board) || |
1978 | IS_SI_BOARD(board)) && (mod_compat_type(type) == 4)) { |
1979 | printk (KERN_ERR "sx: This is an invalid configuration.\n" |
1980 | "Don't use SXDCs on an SI/XIO adapter.\n"); |
1981 | chans=0; |
1982 | break; |
1983 | } |
1984 | #if 0 /* Problem fixed: firmware 3.05 */ |
1985 | if (IS_SX_BOARD(board) && (type == TA8)) { |
1986 | /* There are some issues with the firmware and the DCD/RTS |
1987 | lines. It might work if you tie them together or something. |
1988 | It might also work if you get a newer sx_firmware. Therefore |
1989 | this is just a warning. */ |
1990 | printk (KERN_WARNING "sx: The SX host doesn't work too well " |
1991 | "with the TA8 adapters.\nSpecialix is working on it.\n"); |
1992 | } |
1993 | #endif |
1994 | } |
1995 | |
1996 | if (chans) { |
1997 | /* board->flags |= SX_BOARD_PRESENT; */ |
1998 | if(board->irq > 0) { |
1999 | /* fixed irq, probably PCI */ |
2000 | if(sx_irqmask & (1 << board->irq)) { /* may we use this irq? */ |
2001 | if(request_irq(board->irq, sx_interrupt, SA_SHIRQ | SA_INTERRUPT, "sx", board)) { |
2002 | printk(KERN_ERR "sx: Cannot allocate irq %d.\n", board->irq); |
2003 | board->irq = 0; |
2004 | } |
2005 | } else |
2006 | board->irq = 0; |
2007 | } else if(board->irq < 0 && sx_irqmask) { |
2008 | /* auto-allocate irq */ |
2009 | int irqnr; |
2010 | int irqmask = sx_irqmask & (IS_SX_BOARD(board) ? SX_ISA_IRQ_MASK : SI2_ISA_IRQ_MASK); |
2011 | for(irqnr = 15; irqnr > 0; irqnr--) |
2012 | if(irqmask & (1 << irqnr)) |
2013 | if(! request_irq(irqnr, sx_interrupt, SA_SHIRQ | SA_INTERRUPT, "sx", board)) |
2014 | break; |
2015 | if(! irqnr) |
2016 | printk(KERN_ERR "sx: Cannot allocate IRQ.\n"); |
2017 | board->irq = irqnr; |
2018 | } else |
2019 | board->irq = 0; |
2020 | |
2021 | if (board->irq) { |
2022 | /* Found a valid interrupt, start up interrupts! */ |
2023 | sx_dprintk (SX_DEBUG_INIT, "Using irq %d.\n", board->irq); |
2024 | sx_start_interrupts (board); |
2025 | board->poll = sx_slowpoll; |
2026 | board->flags |= SX_IRQ_ALLOCATED; |
2027 | } else { |
2028 | /* no irq: setup board for polled operation */ |
2029 | board->poll = sx_poll; |
2030 | sx_dprintk (SX_DEBUG_INIT, "Using poll-interval %d.\n", board->poll); |
2031 | } |
2032 | |
2033 | /* The timer should be initialized anyway: That way we can safely |
2034 | del_timer it when the module is unloaded. */ |
2035 | init_timer (&board->timer); |
2036 | |
2037 | if (board->poll) { |
2038 | board->timer.data = (unsigned long) board; |
2039 | board->timer.function = sx_pollfunc; |
2040 | board->timer.expires = jiffies + board->poll; |
2041 | add_timer (&board->timer); |
2042 | } |
2043 | } else { |
2044 | board->irq = 0; |
2045 | } |
2046 | |
2047 | board->nports = chans; |
2048 | sx_dprintk (SX_DEBUG_INIT, "returning %d ports.", board->nports); |
2049 | |
2050 | func_exit(); |
2051 | return chans; |
2052 | } |
2053 | |
2054 | |
2055 | static void printheader(void) |
2056 | { |
2057 | static int header_printed; |
2058 | |
2059 | if (!header_printed) { |
2060 | printk (KERN_INFO "Specialix SX driver " |
2061 | "(C) 1998/1999 R.E.Wolff@BitWizard.nl \n"); |
2062 | printk (KERN_INFO "sx: version %s\n", RCS_ID); |
2063 | header_printed = 1; |
2064 | } |
2065 | } |
2066 | |
2067 | |
2068 | static int probe_sx (struct sx_board *board) |
2069 | { |
2070 | struct vpd_prom vpdp; |
2071 | char *p; |
2072 | int i; |
2073 | |
2074 | func_enter(); |
2075 | |
2076 | if (!IS_CF_BOARD (board)) { |
2077 | sx_dprintk (SX_DEBUG_PROBE, "Going to verify vpd prom at %p.\n", |
2078 | board->base + SX_VPD_ROM); |
2079 | |
2080 | if (sx_debug & SX_DEBUG_PROBE) |
2081 | my_hd_io(board->base + SX_VPD_ROM, 0x40); |
2082 | |
2083 | p = (char *) &vpdp; |
2084 | for (i=0;i< sizeof (struct vpd_prom);i++) |
2085 | *p++ = read_sx_byte (board, SX_VPD_ROM + i*2); |
2086 | |
2087 | if (sx_debug & SX_DEBUG_PROBE) |
2088 | my_hd (&vpdp, 0x20); |
2089 | |
2090 | sx_dprintk (SX_DEBUG_PROBE, "checking identifier...\n"); |
2091 | |
2092 | if (strncmp (vpdp.identifier, SX_VPD_IDENT_STRING, 16) != 0) { |
2093 | sx_dprintk (SX_DEBUG_PROBE, "Got non-SX identifier: '%s'\n", |
2094 | vpdp.identifier); |
2095 | return 0; |
2096 | } |
2097 | } |
2098 | |
2099 | printheader (); |
2100 | |
2101 | if (!IS_CF_BOARD (board)) { |
2102 | printk (KERN_DEBUG "sx: Found an SX board at %lx\n", board->hw_base); |
2103 | printk (KERN_DEBUG "sx: hw_rev: %d, assembly level: %d, uniq ID:%08x, ", |
2104 | vpdp.hwrev, vpdp.hwass, vpdp.uniqid); |
2105 | printk ( "Manufactured: %d/%d\n", |
2106 | 1970 + vpdp.myear, vpdp.mweek); |
2107 | |
2108 | |
2109 | if ((((vpdp.uniqid >> 24) & SX_UNIQUEID_MASK) != SX_PCI_UNIQUEID1) && |
2110 | (((vpdp.uniqid >> 24) & SX_UNIQUEID_MASK) != SX_ISA_UNIQUEID1)) { |
2111 | /* This might be a bit harsh. This was the primary reason the |
2112 | SX/ISA card didn't work at first... */ |
2113 | printk (KERN_ERR "sx: Hmm. Not an SX/PCI or SX/ISA card. Sorry: giving up.\n"); |
2114 | return (0); |
2115 | } |
2116 | |
2117 | if (((vpdp.uniqid >> 24) & SX_UNIQUEID_MASK) == SX_ISA_UNIQUEID1) { |
2118 | if (((unsigned long)board->hw_base) & 0x8000) { |
2119 | printk (KERN_WARNING "sx: Warning: There may be hardware problems with the card at %lx.\n", board->hw_base); |
2120 | printk (KERN_WARNING "sx: Read sx.txt for more info.\n"); |
2121 | } |
2122 | } |
2123 | } |
2124 | |
2125 | board->nports = -1; |
2126 | |
2127 | /* This resets the processor, and keeps it off the bus. */ |
2128 | if (!sx_reset (board)) |
2129 | return 0; |
2130 | sx_dprintk (SX_DEBUG_INIT, "reset the board...\n"); |
2131 | |
2132 | board->flags |= SX_BOARD_PRESENT; |
2133 | |
2134 | func_exit(); |
2135 | return 1; |
2136 | } |
2137 | |
2138 | |
2139 | |
2140 | /* Specialix probes for this card at 32k increments from 640k to 16M. |
2141 | I consider machines with less than 16M unlikely nowadays, so I'm |
2142 | not probing above 1Mb. Also, 0xa0000, 0xb0000, are taken by the VGA |
2143 | card. 0xe0000 and 0xf0000 are taken by the BIOS. That only leaves |
2144 | 0xc0000, 0xc8000, 0xd0000 and 0xd8000 . */ |
2145 | |
2146 | static int probe_si (struct sx_board *board) |
2147 | { |
2148 | int i; |
2149 | |
2150 | func_enter(); |
2151 | sx_dprintk (SX_DEBUG_PROBE, "Going to verify SI signature hw %lx at %p.\n", board->hw_base, |
2152 | board->base + SI2_ISA_ID_BASE); |
2153 | |
2154 | if (sx_debug & SX_DEBUG_PROBE) |
2155 | my_hd_io(board->base + SI2_ISA_ID_BASE, 0x8); |
2156 | |
2157 | if (!IS_EISA_BOARD(board)) { |
2158 | if( IS_SI1_BOARD(board) ) |
2159 | { |
2160 | for (i=0;i<8;i++) { |
2161 | write_sx_byte (board, SI2_ISA_ID_BASE+7-i,i); |
2162 | |
2163 | } |
2164 | } |
2165 | for (i=0;i<8;i++) { |
2166 | if ((read_sx_byte (board, SI2_ISA_ID_BASE+7-i) & 7) != i) { |
2167 | func_exit (); |
2168 | return 0; |
2169 | } |
2170 | } |
2171 | } |
2172 | |
2173 | /* Now we're pretty much convinced that there is an SI board here, |
2174 | but to prevent trouble, we'd better double check that we don't |
2175 | have an SI1 board when we're probing for an SI2 board.... */ |
2176 | |
2177 | write_sx_byte (board, SI2_ISA_ID_BASE,0x10); |
2178 | if ( IS_SI1_BOARD(board)) { |
2179 | /* This should be an SI1 board, which has this |
2180 | location writable... */ |
2181 | if (read_sx_byte (board, SI2_ISA_ID_BASE) != 0x10) |
2182 | func_exit (); |
2183 | return 0; |
2184 | } else { |
2185 | /* This should be an SI2 board, which has the bottom |
2186 | 3 bits non-writable... */ |
2187 | if (read_sx_byte (board, SI2_ISA_ID_BASE) == 0x10) |
2188 | func_exit (); |
2189 | return 0; |
2190 | } |
2191 | |
2192 | /* Now we're pretty much convinced that there is an SI board here, |
2193 | but to prevent trouble, we'd better double check that we don't |
2194 | have an SI1 board when we're probing for an SI2 board.... */ |
2195 | |
2196 | write_sx_byte (board, SI2_ISA_ID_BASE,0x10); |
2197 | if ( IS_SI1_BOARD(board)) { |
2198 | /* This should be an SI1 board, which has this |
2199 | location writable... */ |
2200 | if (read_sx_byte (board, SI2_ISA_ID_BASE) != 0x10) |
2201 | func_exit(); |
2202 | return 0; |
2203 | } else { |
2204 | /* This should be an SI2 board, which has the bottom |
2205 | 3 bits non-writable... */ |
2206 | if (read_sx_byte (board, SI2_ISA_ID_BASE) == 0x10) |
2207 | func_exit (); |
2208 | return 0; |
2209 | } |
2210 | |
2211 | printheader (); |
2212 | |
2213 | printk (KERN_DEBUG "sx: Found an SI board at %lx\n", board->hw_base); |
2214 | /* Compared to the SX boards, it is a complete guess as to what |
2215 | this card is up to... */ |
2216 | |
2217 | board->nports = -1; |
2218 | |
2219 | /* This resets the processor, and keeps it off the bus. */ |
2220 | if (!sx_reset (board)) |
2221 | return 0; |
2222 | sx_dprintk (SX_DEBUG_INIT, "reset the board...\n"); |
2223 | |
2224 | board->flags |= SX_BOARD_PRESENT; |
2225 | |
2226 | func_exit(); |
2227 | return 1; |
2228 | } |
2229 | |
2230 | static struct tty_operations sx_ops = { |
2231 | .break_ctl = sx_break, |
2232 | .open = sx_open, |
2233 | .close = gs_close, |
2234 | .write = gs_write, |
2235 | .put_char = gs_put_char, |
2236 | .flush_chars = gs_flush_chars, |
2237 | .write_room = gs_write_room, |
2238 | .chars_in_buffer = gs_chars_in_buffer, |
2239 | .flush_buffer = gs_flush_buffer, |
2240 | .ioctl = sx_ioctl, |
2241 | .throttle = sx_throttle, |
2242 | .unthrottle = sx_unthrottle, |
2243 | .set_termios = gs_set_termios, |
2244 | .stop = gs_stop, |
2245 | .start = gs_start, |
2246 | .hangup = gs_hangup, |
2247 | .tiocmget = sx_tiocmget, |
2248 | .tiocmset = sx_tiocmset, |
2249 | }; |
2250 | |
2251 | static int sx_init_drivers(void) |
2252 | { |
2253 | int error; |
2254 | |
2255 | func_enter(); |
2256 | |
2257 | sx_driver = alloc_tty_driver(sx_nports); |
2258 | if (!sx_driver) |
2259 | return 1; |
2260 | sx_driver->owner = THIS_MODULE; |
2261 | sx_driver->driver_name = "specialix_sx"; |
2262 | sx_driver->name = "ttyX"; |
2263 | sx_driver->major = SX_NORMAL_MAJOR; |
2264 | sx_driver->type = TTY_DRIVER_TYPE_SERIAL; |
2265 | sx_driver->subtype = SERIAL_TYPE_NORMAL; |
2266 | sx_driver->init_termios = tty_std_termios; |
2267 | sx_driver->init_termios.c_cflag = |
2268 | B9600 | CS8 | CREAD | HUPCL | CLOCAL; |
2269 | sx_driver->flags = TTY_DRIVER_REAL_RAW; |
2270 | tty_set_operations(sx_driver, &sx_ops); |
2271 | |
2272 | if ((error = tty_register_driver(sx_driver))) { |
2273 | put_tty_driver(sx_driver); |
2274 | printk(KERN_ERR "sx: Couldn't register sx driver, error = %d\n", |
2275 | error); |
2276 | return 1; |
2277 | } |
2278 | func_exit(); |
2279 | return 0; |
2280 | } |
2281 | |
2282 | |
2283 | static void * ckmalloc (int size) |
2284 | { |
2285 | void *p; |
2286 | |
2287 | p = kmalloc(size, GFP_KERNEL); |
2288 | if (p) |
2289 | memset(p, 0, size); |
2290 | return p; |
2291 | } |
2292 | |
2293 | |
2294 | static int sx_init_portstructs (int nboards, int nports) |
2295 | { |
2296 | struct sx_board *board; |
2297 | struct sx_port *port; |
2298 | int i, j; |
2299 | int addr, chans; |
2300 | int portno; |
2301 | |
2302 | func_enter(); |
2303 | |
2304 | /* Many drivers statically allocate the maximum number of ports |
2305 | There is no reason not to allocate them dynamically. Is there? -- REW */ |
2306 | sx_ports = ckmalloc(nports * sizeof (struct sx_port)); |
2307 | if (!sx_ports) |
2308 | return -ENOMEM; |
2309 | |
2310 | port = sx_ports; |
2311 | for (i = 0; i < nboards; i++) { |
2312 | board = &boards[i]; |
2313 | board->ports = port; |
2314 | for (j=0; j < boards[i].nports;j++) { |
2315 | sx_dprintk (SX_DEBUG_INIT, "initing port %d\n", j); |
2316 | port->gs.magic = SX_MAGIC; |
2317 | port->gs.close_delay = HZ/2; |
2318 | port->gs.closing_wait = 30 * HZ; |
2319 | port->board = board; |
2320 | port->gs.rd = &sx_real_driver; |
2321 | #ifdef NEW_WRITE_LOCKING |
2322 | port->gs.port_write_sem = MUTEX; |
2323 | #endif |
2324 | port->gs.driver_lock = SPIN_LOCK_UNLOCKED; |
2325 | /* |
2326 | * Initializing wait queue |
2327 | */ |
2328 | init_waitqueue_head(&port->gs.open_wait); |
2329 | init_waitqueue_head(&port->gs.close_wait); |
2330 | |
2331 | port++; |
2332 | } |
2333 | } |
2334 | |
2335 | port = sx_ports; |
2336 | portno = 0; |
2337 | for (i = 0; i < nboards; i++) { |
2338 | board = &boards[i]; |
2339 | board->port_base = portno; |
2340 | /* Possibly the configuration was rejected. */ |
2341 | sx_dprintk (SX_DEBUG_PROBE, "Board has %d channels\n", board->nports); |
2342 | if (board->nports <= 0) continue; |
2343 | /* XXX byteorder ?? */ |
2344 | for (addr = 0x80;addr != 0;addr = read_sx_word (board, addr) & 0x7fff) { |
2345 | chans = sx_read_module_byte (board, addr, mc_type); |
2346 | sx_dprintk (SX_DEBUG_PROBE, "Module at %x: %d channels\n", addr, chans); |
2347 | sx_dprintk (SX_DEBUG_PROBE, "Port at"); |
2348 | for (j=0;j<chans;j++) { |
2349 | /* The "sx-way" is the way it SHOULD be done. That way in the |
2350 | future, the firmware may for example pack the structures a bit |
2351 | more efficient. Neil tells me it isn't going to happen anytime |
2352 | soon though. */ |
2353 | if (IS_SX_BOARD(board)) |
2354 | port->ch_base = sx_read_module_word (board, addr+j*2, mc_chan_pointer); |
2355 | else |
2356 | port->ch_base = addr + 0x100 + 0x300*j; |
2357 | |
2358 | sx_dprintk (SX_DEBUG_PROBE, " %x", port->ch_base); |
2359 | port->line = portno++; |
2360 | port++; |
2361 | } |
2362 | sx_dprintk (SX_DEBUG_PROBE, "\n"); |
2363 | } |
2364 | /* This has to be done earlier. */ |
2365 | /* board->flags |= SX_BOARD_INITIALIZED; */ |
2366 | } |
2367 | |
2368 | func_exit(); |
2369 | return 0; |
2370 | } |
2371 | |
2372 | static void __exit sx_release_drivers(void) |
2373 | { |
2374 | func_enter(); |
2375 | tty_unregister_driver(sx_driver); |
2376 | put_tty_driver(sx_driver); |
2377 | func_exit(); |
2378 | } |
2379 | |
2380 | #ifdef CONFIG_PCI |
2381 | /******************************************************** |
2382 | * Setting bit 17 in the CNTRL register of the PLX 9050 * |
2383 | * chip forces a retry on writes while a read is pending.* |
2384 | * This is to prevent the card locking up on Intel Xeon * |
2385 | * multiprocessor systems with the NX chipset. -- NV * |
2386 | ********************************************************/ |
2387 | |
2388 | /* Newer cards are produced with this bit set from the configuration |
2389 | EEprom. As the bit is read/write for the CPU, we can fix it here, |
2390 | if we detect that it isn't set correctly. -- REW */ |
2391 | |
2392 | static void fix_sx_pci (struct pci_dev *pdev, struct sx_board *board) |
2393 | { |
2394 | unsigned int hwbase; |
2395 | void __iomem *rebase; |
2396 | unsigned int t; |
2397 | |
2398 | #define CNTRL_REG_OFFSET 0x50 |
2399 | #define CNTRL_REG_GOODVALUE 0x18260000 |
2400 | |
2401 | pci_read_config_dword(pdev, PCI_BASE_ADDRESS_0, &hwbase); |
2402 | hwbase &= PCI_BASE_ADDRESS_MEM_MASK; |
2403 | rebase = ioremap(hwbase, 0x80); |
2404 | t = readl (rebase + CNTRL_REG_OFFSET); |
2405 | if (t != CNTRL_REG_GOODVALUE) { |
2406 | printk (KERN_DEBUG "sx: performing cntrl reg fix: %08x -> %08x\n", t, CNTRL_REG_GOODVALUE); |
2407 | writel (CNTRL_REG_GOODVALUE, rebase + CNTRL_REG_OFFSET); |
2408 | } |
2409 | iounmap(rebase); |
2410 | } |
2411 | #endif |
2412 | |
2413 | |
2414 | static int __init sx_init(void) |
2415 | { |
2416 | int i; |
2417 | int found = 0; |
2418 | int eisa_slot; |
2419 | struct sx_board *board; |
2420 | |
2421 | #ifdef CONFIG_PCI |
2422 | struct pci_dev *pdev = NULL; |
2423 | unsigned int tint; |
2424 | unsigned short tshort; |
2425 | #endif |
2426 | |
2427 | func_enter(); |
2428 | sx_dprintk (SX_DEBUG_INIT, "Initing sx module... (sx_debug=%d)\n", sx_debug); |
2429 | if (abs ((long) (&sx_debug) - sx_debug) < 0x10000) { |
2430 | printk (KERN_WARNING "sx: sx_debug is an address, instead of a value. " |
2431 | "Assuming -1.\n"); |
2432 | printk ("(%p)\n", &sx_debug); |
2433 | sx_debug=-1; |
2434 | } |
2435 | |
2436 | if (misc_register(&sx_fw_device) < 0) { |
2437 | printk(KERN_ERR "SX: Unable to register firmware loader driver.\n"); |
2438 | return -EIO; |
2439 | } |
2440 | |
2441 | #ifdef CONFIG_PCI |
2442 | while ((pdev = pci_find_device (PCI_VENDOR_ID_SPECIALIX, |
2443 | PCI_DEVICE_ID_SPECIALIX_SX_XIO_IO8, |
2444 | pdev))) { |
2445 | if (pci_enable_device(pdev)) |
2446 | continue; |
2447 | |
2448 | /* Specialix has a whole bunch of cards with |
2449 | 0x2000 as the device ID. They say its because |
2450 | the standard requires it. Stupid standard. */ |
2451 | /* It seems that reading a word doesn't work reliably on 2.0. |
2452 | Also, reading a non-aligned dword doesn't work. So we read the |
2453 | whole dword at 0x2c and extract the word at 0x2e (SUBSYSTEM_ID) |
2454 | ourselves */ |
2455 | /* I don't know why the define doesn't work, constant 0x2c does --REW */ |
2456 | pci_read_config_dword (pdev, 0x2c, &tint); |
2457 | tshort = (tint >> 16) & 0xffff; |
2458 | sx_dprintk (SX_DEBUG_PROBE, "Got a specialix card: %x.\n", tint); |
2459 | /* sx_dprintk (SX_DEBUG_PROBE, "pdev = %d/%d (%x)\n", pdev, tint); */ |
2460 | if ((tshort != 0x0200) && (tshort != 0x0300)) { |
2461 | sx_dprintk (SX_DEBUG_PROBE, "But it's not an SX card (%d)...\n", |
2462 | tshort); |
2463 | continue; |
2464 | } |
2465 | board = &boards[found]; |
2466 | |
2467 | board->flags &= ~SX_BOARD_TYPE; |
2468 | board->flags |= (tshort == 0x200)?SX_PCI_BOARD: |
2469 | SX_CFPCI_BOARD; |
2470 | |
2471 | /* CF boards use base address 3.... */ |
2472 | if (IS_CF_BOARD (board)) |
2473 | board->hw_base = pci_resource_start (pdev, 3); |
2474 | else |
2475 | board->hw_base = pci_resource_start (pdev, 2); |
2476 | board->base2 = |
2477 | board->base = ioremap(board->hw_base, WINDOW_LEN (board)); |
2478 | if (!board->base) { |
2479 | printk(KERN_ERR "ioremap failed\n"); |
2480 | /* XXX handle error */ |
2481 | } |
2482 | |
2483 | /* Most of the stuff on the CF board is offset by |
2484 | 0x18000 .... */ |
2485 | if (IS_CF_BOARD (board)) board->base += 0x18000; |
2486 | |
2487 | board->irq = pdev->irq; |
2488 | |
2489 | sx_dprintk (SX_DEBUG_PROBE, "Got a specialix card: %x/%p(%d) %x.\n", |
2490 | tint, boards[found].base, board->irq, board->flags); |
2491 | |
2492 | if (probe_sx (board)) { |
2493 | found++; |
2494 | fix_sx_pci (pdev, board); |
2495 | } else |
2496 | iounmap(board->base2); |
2497 | } |
2498 | #endif |
2499 | |
2500 | for (i=0;i<NR_SX_ADDRS;i++) { |
2501 | board = &boards[found]; |
2502 | board->hw_base = sx_probe_addrs[i]; |
2503 | board->base2 = |
2504 | board->base = ioremap(board->hw_base, SX_WINDOW_LEN); |
2505 | board->flags &= ~SX_BOARD_TYPE; |
2506 | board->flags |= SX_ISA_BOARD; |
2507 | board->irq = sx_irqmask?-1:0; |
2508 | |
2509 | if (probe_sx (board)) { |
2510 | found++; |
2511 | } else { |
2512 | iounmap(board->base); |
2513 | } |
2514 | } |
2515 | |
2516 | for (i=0;i<NR_SI_ADDRS;i++) { |
2517 | board = &boards[found]; |
2518 | board->hw_base = si_probe_addrs[i]; |
2519 | board->base2 = |
2520 | board->base = ioremap(board->hw_base, SI2_ISA_WINDOW_LEN); |
2521 | board->flags &= ~SX_BOARD_TYPE; |
2522 | board->flags |= SI_ISA_BOARD; |
2523 | board->irq = sx_irqmask ?-1:0; |
2524 | |
2525 | if (probe_si (board)) { |
2526 | found++; |
2527 | } else { |
2528 | iounmap (board->base); |
2529 | } |
2530 | } |
2531 | for (i=0;i<NR_SI1_ADDRS;i++) { |
2532 | board = &boards[found]; |
2533 | board->hw_base = si1_probe_addrs[i]; |
2534 | board->base2 = |
2535 | board->base = ioremap(board->hw_base, SI1_ISA_WINDOW_LEN); |
2536 | board->flags &= ~SX_BOARD_TYPE; |
2537 | board->flags |= SI1_ISA_BOARD; |
2538 | board->irq = sx_irqmask ?-1:0; |
2539 | |
2540 | if (probe_si (board)) { |
2541 | found++; |
2542 | } else { |
2543 | iounmap (board->base); |
2544 | } |
2545 | } |
2546 | |
2547 | sx_dprintk(SX_DEBUG_PROBE, "Probing for EISA cards\n"); |
2548 | for(eisa_slot=0x1000; eisa_slot<0x10000; eisa_slot+=0x1000) |
2549 | { |
2550 | if((inb(eisa_slot+0xc80)==0x4d) && |
2551 | (inb(eisa_slot+0xc81)==0x98)) |
2552 | { |
2553 | sx_dprintk(SX_DEBUG_PROBE, "%s : Signature found in EISA slot %d, Product %d Rev %d\n", |
2554 | "XIO", (eisa_slot>>12), inb(eisa_slot+0xc82), inb(eisa_slot+0xc83)); |
2555 | |
2556 | board = &boards[found]; |
2557 | board->eisa_base = eisa_slot; |
2558 | board->flags &= ~SX_BOARD_TYPE; |
2559 | board->flags |= SI_EISA_BOARD; |
2560 | |
2561 | board->hw_base = (((inb(0xc01+eisa_slot) << 8) + inb(0xc00+eisa_slot)) << 16); |
2562 | board->base2 = |
2563 | board->base = ioremap(board->hw_base, SI2_EISA_WINDOW_LEN); |
2564 | |
2565 | sx_dprintk(SX_DEBUG_PROBE, "IO hw_base address: %lx\n", board->hw_base); |
2566 | sx_dprintk(SX_DEBUG_PROBE, "base: %p\n", board->base); |
2567 | board->irq = inb(board->eisa_base+0xc02)>>4; |
2568 | sx_dprintk(SX_DEBUG_PROBE, "IRQ: %d\n", board->irq); |
2569 | |
2570 | probe_si(board); |
2571 | |
2572 | found++; |
2573 | } |
2574 | } |
2575 | if (found) { |
2576 | printk (KERN_INFO "sx: total of %d boards detected.\n", found); |
2577 | } else { |
2578 | misc_deregister(&sx_fw_device); |
2579 | } |
2580 | |
2581 | func_exit(); |
2582 | return found?0:-EIO; |
2583 | } |
2584 | |
2585 | |
2586 | static void __exit sx_exit (void) |
2587 | { |
2588 | int i; |
2589 | struct sx_board *board; |
2590 | |
2591 | func_enter(); |
2592 | for (i = 0; i < SX_NBOARDS; i++) { |
2593 | board = &boards[i]; |
2594 | if (board->flags & SX_BOARD_INITIALIZED) { |
2595 | sx_dprintk (SX_DEBUG_CLEANUP, "Cleaning up board at %p\n", board->base); |
2596 | /* The board should stop messing with us. |
2597 | (actually I mean the interrupt) */ |
2598 | sx_reset (board); |
2599 | if ((board->irq) && (board->flags & SX_IRQ_ALLOCATED)) |
2600 | free_irq (board->irq, board); |
2601 | |
2602 | /* It is safe/allowed to del_timer a non-active timer */ |
2603 | del_timer (& board->timer); |
2604 | iounmap(board->base); |
2605 | } |
2606 | } |
2607 | if (misc_deregister(&sx_fw_device) < 0) { |
2608 | printk (KERN_INFO "sx: couldn't deregister firmware loader devic\n"); |
2609 | } |
2610 | sx_dprintk (SX_DEBUG_CLEANUP, "Cleaning up drivers (%d)\n", sx_initialized); |
2611 | if (sx_initialized) |
2612 | sx_release_drivers (); |
2613 | |
2614 | kfree (sx_ports); |
2615 | func_exit(); |
2616 | } |
2617 | |
2618 | module_init(sx_init); |
2619 | module_exit(sx_exit); |
2620 | |
2621 |