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1da177e4 LT |
1 | /* |
2 | * Berkshire PCI-PC Watchdog Card Driver | |
3 | * | |
4 | * (c) Copyright 2003 Wim Van Sebroeck <wim@iguana.be>. | |
5 | * | |
6 | * Based on source code of the following authors: | |
7 | * Ken Hollis <kenji@bitgate.com>, | |
8 | * Lindsay Harris <lindsay@bluegum.com>, | |
9 | * Alan Cox <alan@redhat.com>, | |
10 | * Matt Domsch <Matt_Domsch@dell.com>, | |
11 | * Rob Radez <rob@osinvestor.com> | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or | |
14 | * modify it under the terms of the GNU General Public License | |
15 | * as published by the Free Software Foundation; either version | |
16 | * 2 of the License, or (at your option) any later version. | |
17 | * | |
18 | * Neither Wim Van Sebroeck nor Iguana vzw. admit liability nor | |
19 | * provide warranty for any of this software. This material is | |
20 | * provided "AS-IS" and at no charge. | |
21 | */ | |
22 | ||
23 | /* | |
24 | * A bells and whistles driver is available from http://www.pcwd.de/ | |
25 | * More info available at http://www.berkprod.com/ or http://www.pcwatchdog.com/ | |
26 | */ | |
27 | ||
28 | /* | |
29 | * Includes, defines, variables, module parameters, ... | |
30 | */ | |
31 | ||
c315b7e8 WVS |
32 | #include <linux/config.h> /* For CONFIG_WATCHDOG_NOWAYOUT/... */ |
33 | #include <linux/module.h> /* For module specific items */ | |
34 | #include <linux/moduleparam.h> /* For new moduleparam's */ | |
35 | #include <linux/types.h> /* For standard types (like size_t) */ | |
36 | #include <linux/errno.h> /* For the -ENODEV/... values */ | |
37 | #include <linux/kernel.h> /* For printk/panic/... */ | |
38 | #include <linux/delay.h> /* For mdelay function */ | |
39 | #include <linux/miscdevice.h> /* For MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR) */ | |
40 | #include <linux/watchdog.h> /* For the watchdog specific items */ | |
41 | #include <linux/notifier.h> /* For notifier support */ | |
42 | #include <linux/reboot.h> /* For reboot_notifier stuff */ | |
43 | #include <linux/init.h> /* For __init/__exit/... */ | |
44 | #include <linux/fs.h> /* For file operations */ | |
45 | #include <linux/pci.h> /* For pci functions */ | |
46 | #include <linux/ioport.h> /* For io-port access */ | |
47 | #include <linux/spinlock.h> /* For spin_lock/spin_unlock/... */ | |
48 | ||
49 | #include <asm/uaccess.h> /* For copy_to_user/put_user/... */ | |
50 | #include <asm/io.h> /* For inb/outb/... */ | |
1da177e4 LT |
51 | |
52 | /* Module and version information */ | |
53 | #define WATCHDOG_VERSION "1.01" | |
c315b7e8 | 54 | #define WATCHDOG_DATE "02 Sep 2005" |
1da177e4 LT |
55 | #define WATCHDOG_DRIVER_NAME "PCI-PC Watchdog" |
56 | #define WATCHDOG_NAME "pcwd_pci" | |
57 | #define PFX WATCHDOG_NAME ": " | |
58 | #define DRIVER_VERSION WATCHDOG_DRIVER_NAME " driver, v" WATCHDOG_VERSION " (" WATCHDOG_DATE ")\n" | |
59 | ||
60 | /* Stuff for the PCI ID's */ | |
61 | #ifndef PCI_VENDOR_ID_QUICKLOGIC | |
62 | #define PCI_VENDOR_ID_QUICKLOGIC 0x11e3 | |
63 | #endif | |
64 | ||
65 | #ifndef PCI_DEVICE_ID_WATCHDOG_PCIPCWD | |
66 | #define PCI_DEVICE_ID_WATCHDOG_PCIPCWD 0x5030 | |
67 | #endif | |
68 | ||
69 | /* | |
70 | * These are the defines that describe the control status bits for the | |
71 | * PCI-PC Watchdog card. | |
72 | */ | |
73 | #define WD_PCI_WTRP 0x01 /* Watchdog Trip status */ | |
74 | #define WD_PCI_HRBT 0x02 /* Watchdog Heartbeat */ | |
75 | #define WD_PCI_TTRP 0x04 /* Temperature Trip status */ | |
76 | ||
77 | /* according to documentation max. time to process a command for the pci | |
78 | * watchdog card is 100 ms, so we give it 150 ms to do it's job */ | |
79 | #define PCI_COMMAND_TIMEOUT 150 | |
80 | ||
81 | /* Watchdog's internal commands */ | |
82 | #define CMD_GET_STATUS 0x04 | |
83 | #define CMD_GET_FIRMWARE_VERSION 0x08 | |
84 | #define CMD_READ_WATCHDOG_TIMEOUT 0x18 | |
85 | #define CMD_WRITE_WATCHDOG_TIMEOUT 0x19 | |
86 | ||
87 | /* We can only use 1 card due to the /dev/watchdog restriction */ | |
88 | static int cards_found; | |
89 | ||
90 | /* internal variables */ | |
91 | static int temp_panic; | |
92 | static unsigned long is_active; | |
93 | static char expect_release; | |
94 | static struct { | |
95 | int supports_temp; /* Wether or not the card has a temperature device */ | |
96 | int boot_status; /* The card's boot status */ | |
97 | unsigned long io_addr; /* The cards I/O address */ | |
98 | spinlock_t io_lock; | |
99 | struct pci_dev *pdev; | |
100 | } pcipcwd_private; | |
101 | ||
102 | /* module parameters */ | |
103 | #define WATCHDOG_HEARTBEAT 2 /* 2 sec default heartbeat */ | |
104 | static int heartbeat = WATCHDOG_HEARTBEAT; | |
105 | module_param(heartbeat, int, 0); | |
106 | MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds. (0<heartbeat<65536, default=" __MODULE_STRING(WATCHDOG_HEARTBEAT) ")"); | |
107 | ||
4bfdf378 | 108 | static int nowayout = WATCHDOG_NOWAYOUT; |
1da177e4 LT |
109 | module_param(nowayout, int, 0); |
110 | MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)"); | |
111 | ||
112 | /* | |
113 | * Internal functions | |
114 | */ | |
115 | ||
116 | static int send_command(int cmd, int *msb, int *lsb) | |
117 | { | |
118 | int got_response, count; | |
119 | ||
120 | spin_lock(&pcipcwd_private.io_lock); | |
121 | /* If a command requires data it should be written first. | |
122 | * Data for commands with 8 bits of data should be written to port 4. | |
123 | * Commands with 16 bits of data, should be written as LSB to port 4 | |
124 | * and MSB to port 5. | |
125 | * After the required data has been written then write the command to | |
126 | * port 6. */ | |
127 | outb_p(*lsb, pcipcwd_private.io_addr + 4); | |
128 | outb_p(*msb, pcipcwd_private.io_addr + 5); | |
129 | outb_p(cmd, pcipcwd_private.io_addr + 6); | |
130 | ||
131 | /* wait till the pci card processed the command, signaled by | |
132 | * the WRSP bit in port 2 and give it a max. timeout of | |
133 | * PCI_COMMAND_TIMEOUT to process */ | |
134 | got_response = inb_p(pcipcwd_private.io_addr + 2) & 0x40; | |
135 | for (count = 0; (count < PCI_COMMAND_TIMEOUT) && (!got_response); count++) { | |
136 | mdelay(1); | |
137 | got_response = inb_p(pcipcwd_private.io_addr + 2) & 0x40; | |
138 | } | |
139 | ||
140 | if (got_response) { | |
141 | /* read back response */ | |
142 | *lsb = inb_p(pcipcwd_private.io_addr + 4); | |
143 | *msb = inb_p(pcipcwd_private.io_addr + 5); | |
144 | ||
145 | /* clear WRSP bit */ | |
146 | inb_p(pcipcwd_private.io_addr + 6); | |
147 | } | |
148 | spin_unlock(&pcipcwd_private.io_lock); | |
149 | ||
150 | return got_response; | |
151 | } | |
152 | ||
153 | static int pcipcwd_start(void) | |
154 | { | |
155 | int stat_reg; | |
156 | ||
157 | spin_lock(&pcipcwd_private.io_lock); | |
158 | outb_p(0x00, pcipcwd_private.io_addr + 3); | |
159 | udelay(1000); | |
160 | ||
161 | stat_reg = inb_p(pcipcwd_private.io_addr + 2); | |
162 | spin_unlock(&pcipcwd_private.io_lock); | |
163 | ||
164 | if (stat_reg & 0x10) { | |
165 | printk(KERN_ERR PFX "Card timer not enabled\n"); | |
166 | return -1; | |
167 | } | |
168 | ||
169 | return 0; | |
170 | } | |
171 | ||
172 | static int pcipcwd_stop(void) | |
173 | { | |
174 | int stat_reg; | |
175 | ||
176 | spin_lock(&pcipcwd_private.io_lock); | |
177 | outb_p(0xA5, pcipcwd_private.io_addr + 3); | |
178 | udelay(1000); | |
179 | ||
180 | outb_p(0xA5, pcipcwd_private.io_addr + 3); | |
181 | udelay(1000); | |
182 | ||
183 | stat_reg = inb_p(pcipcwd_private.io_addr + 2); | |
184 | spin_unlock(&pcipcwd_private.io_lock); | |
185 | ||
186 | if (!(stat_reg & 0x10)) { | |
187 | printk(KERN_ERR PFX "Card did not acknowledge disable attempt\n"); | |
188 | return -1; | |
189 | } | |
190 | ||
191 | return 0; | |
192 | } | |
193 | ||
194 | static int pcipcwd_keepalive(void) | |
195 | { | |
196 | /* Re-trigger watchdog by writing to port 0 */ | |
197 | outb_p(0x42, pcipcwd_private.io_addr); | |
198 | return 0; | |
199 | } | |
200 | ||
201 | static int pcipcwd_set_heartbeat(int t) | |
202 | { | |
203 | int t_msb = t / 256; | |
204 | int t_lsb = t % 256; | |
205 | ||
206 | if ((t < 0x0001) || (t > 0xFFFF)) | |
207 | return -EINVAL; | |
208 | ||
209 | /* Write new heartbeat to watchdog */ | |
210 | send_command(CMD_WRITE_WATCHDOG_TIMEOUT, &t_msb, &t_lsb); | |
211 | ||
212 | heartbeat = t; | |
213 | return 0; | |
214 | } | |
215 | ||
216 | static int pcipcwd_get_status(int *status) | |
217 | { | |
218 | int new_status; | |
219 | ||
220 | *status=0; | |
221 | new_status = inb_p(pcipcwd_private.io_addr + 1); | |
222 | if (new_status & WD_PCI_WTRP) | |
223 | *status |= WDIOF_CARDRESET; | |
224 | if (new_status & WD_PCI_TTRP) { | |
225 | *status |= WDIOF_OVERHEAT; | |
226 | if (temp_panic) | |
227 | panic(PFX "Temperature overheat trip!\n"); | |
228 | } | |
229 | ||
230 | return 0; | |
231 | } | |
232 | ||
233 | static int pcipcwd_clear_status(void) | |
234 | { | |
235 | outb_p(0x01, pcipcwd_private.io_addr + 1); | |
236 | return 0; | |
237 | } | |
238 | ||
239 | static int pcipcwd_get_temperature(int *temperature) | |
240 | { | |
241 | *temperature = 0; | |
242 | if (!pcipcwd_private.supports_temp) | |
243 | return -ENODEV; | |
244 | ||
245 | /* | |
246 | * Convert celsius to fahrenheit, since this was | |
247 | * the decided 'standard' for this return value. | |
248 | */ | |
249 | *temperature = ((inb_p(pcipcwd_private.io_addr)) * 9 / 5) + 32; | |
250 | ||
251 | return 0; | |
252 | } | |
253 | ||
254 | /* | |
255 | * /dev/watchdog handling | |
256 | */ | |
257 | ||
258 | static ssize_t pcipcwd_write(struct file *file, const char __user *data, | |
259 | size_t len, loff_t *ppos) | |
260 | { | |
261 | /* See if we got the magic character 'V' and reload the timer */ | |
262 | if (len) { | |
263 | if (!nowayout) { | |
264 | size_t i; | |
265 | ||
266 | /* note: just in case someone wrote the magic character | |
267 | * five months ago... */ | |
268 | expect_release = 0; | |
269 | ||
270 | /* scan to see whether or not we got the magic character */ | |
271 | for (i = 0; i != len; i++) { | |
272 | char c; | |
273 | if(get_user(c, data+i)) | |
274 | return -EFAULT; | |
275 | if (c == 'V') | |
276 | expect_release = 42; | |
277 | } | |
278 | } | |
279 | ||
280 | /* someone wrote to us, we should reload the timer */ | |
281 | pcipcwd_keepalive(); | |
282 | } | |
283 | return len; | |
284 | } | |
285 | ||
286 | static int pcipcwd_ioctl(struct inode *inode, struct file *file, | |
287 | unsigned int cmd, unsigned long arg) | |
288 | { | |
289 | void __user *argp = (void __user *)arg; | |
290 | int __user *p = argp; | |
291 | static struct watchdog_info ident = { | |
292 | .options = WDIOF_OVERHEAT | | |
293 | WDIOF_CARDRESET | | |
294 | WDIOF_KEEPALIVEPING | | |
295 | WDIOF_SETTIMEOUT | | |
296 | WDIOF_MAGICCLOSE, | |
297 | .firmware_version = 1, | |
298 | .identity = WATCHDOG_DRIVER_NAME, | |
299 | }; | |
300 | ||
301 | switch (cmd) { | |
302 | case WDIOC_GETSUPPORT: | |
303 | return copy_to_user(argp, &ident, | |
304 | sizeof (ident)) ? -EFAULT : 0; | |
305 | ||
306 | case WDIOC_GETSTATUS: | |
307 | { | |
308 | int status; | |
309 | ||
310 | pcipcwd_get_status(&status); | |
311 | ||
312 | return put_user(status, p); | |
313 | } | |
314 | ||
315 | case WDIOC_GETBOOTSTATUS: | |
316 | return put_user(pcipcwd_private.boot_status, p); | |
317 | ||
318 | case WDIOC_GETTEMP: | |
319 | { | |
320 | int temperature; | |
321 | ||
322 | if (pcipcwd_get_temperature(&temperature)) | |
323 | return -EFAULT; | |
324 | ||
325 | return put_user(temperature, p); | |
326 | } | |
327 | ||
328 | case WDIOC_KEEPALIVE: | |
329 | pcipcwd_keepalive(); | |
330 | return 0; | |
331 | ||
332 | case WDIOC_SETOPTIONS: | |
333 | { | |
334 | int new_options, retval = -EINVAL; | |
335 | ||
336 | if (get_user (new_options, p)) | |
337 | return -EFAULT; | |
338 | ||
339 | if (new_options & WDIOS_DISABLECARD) { | |
c315b7e8 WVS |
340 | if (pcipcwd_stop()) |
341 | return -EIO; | |
1da177e4 LT |
342 | retval = 0; |
343 | } | |
344 | ||
345 | if (new_options & WDIOS_ENABLECARD) { | |
c315b7e8 WVS |
346 | if (pcipcwd_start()) |
347 | return -EIO; | |
1da177e4 LT |
348 | retval = 0; |
349 | } | |
350 | ||
351 | if (new_options & WDIOS_TEMPPANIC) { | |
352 | temp_panic = 1; | |
353 | retval = 0; | |
354 | } | |
355 | ||
356 | return retval; | |
357 | } | |
358 | ||
359 | case WDIOC_SETTIMEOUT: | |
360 | { | |
361 | int new_heartbeat; | |
362 | ||
363 | if (get_user(new_heartbeat, p)) | |
364 | return -EFAULT; | |
365 | ||
366 | if (pcipcwd_set_heartbeat(new_heartbeat)) | |
367 | return -EINVAL; | |
368 | ||
369 | pcipcwd_keepalive(); | |
370 | /* Fall */ | |
371 | } | |
372 | ||
373 | case WDIOC_GETTIMEOUT: | |
374 | return put_user(heartbeat, p); | |
375 | ||
376 | default: | |
377 | return -ENOIOCTLCMD; | |
378 | } | |
379 | } | |
380 | ||
381 | static int pcipcwd_open(struct inode *inode, struct file *file) | |
382 | { | |
383 | /* /dev/watchdog can only be opened once */ | |
384 | if (test_and_set_bit(0, &is_active)) | |
385 | return -EBUSY; | |
386 | ||
387 | /* Activate */ | |
388 | pcipcwd_start(); | |
389 | pcipcwd_keepalive(); | |
390 | return nonseekable_open(inode, file); | |
391 | } | |
392 | ||
393 | static int pcipcwd_release(struct inode *inode, struct file *file) | |
394 | { | |
395 | /* | |
396 | * Shut off the timer. | |
397 | */ | |
398 | if (expect_release == 42) { | |
399 | pcipcwd_stop(); | |
400 | } else { | |
401 | printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n"); | |
402 | pcipcwd_keepalive(); | |
403 | } | |
404 | expect_release = 0; | |
405 | clear_bit(0, &is_active); | |
406 | return 0; | |
407 | } | |
408 | ||
409 | /* | |
410 | * /dev/temperature handling | |
411 | */ | |
412 | ||
413 | static ssize_t pcipcwd_temp_read(struct file *file, char __user *data, | |
414 | size_t len, loff_t *ppos) | |
415 | { | |
416 | int temperature; | |
417 | ||
418 | if (pcipcwd_get_temperature(&temperature)) | |
419 | return -EFAULT; | |
420 | ||
421 | if (copy_to_user (data, &temperature, 1)) | |
422 | return -EFAULT; | |
423 | ||
424 | return 1; | |
425 | } | |
426 | ||
427 | static int pcipcwd_temp_open(struct inode *inode, struct file *file) | |
428 | { | |
429 | if (!pcipcwd_private.supports_temp) | |
430 | return -ENODEV; | |
431 | ||
432 | return nonseekable_open(inode, file); | |
433 | } | |
434 | ||
435 | static int pcipcwd_temp_release(struct inode *inode, struct file *file) | |
436 | { | |
437 | return 0; | |
438 | } | |
439 | ||
440 | /* | |
441 | * Notify system | |
442 | */ | |
443 | ||
444 | static int pcipcwd_notify_sys(struct notifier_block *this, unsigned long code, void *unused) | |
445 | { | |
446 | if (code==SYS_DOWN || code==SYS_HALT) { | |
447 | /* Turn the WDT off */ | |
448 | pcipcwd_stop(); | |
449 | } | |
450 | ||
451 | return NOTIFY_DONE; | |
452 | } | |
453 | ||
454 | /* | |
455 | * Kernel Interfaces | |
456 | */ | |
457 | ||
458 | static struct file_operations pcipcwd_fops = { | |
459 | .owner = THIS_MODULE, | |
460 | .llseek = no_llseek, | |
461 | .write = pcipcwd_write, | |
462 | .ioctl = pcipcwd_ioctl, | |
463 | .open = pcipcwd_open, | |
464 | .release = pcipcwd_release, | |
465 | }; | |
466 | ||
467 | static struct miscdevice pcipcwd_miscdev = { | |
468 | .minor = WATCHDOG_MINOR, | |
469 | .name = "watchdog", | |
470 | .fops = &pcipcwd_fops, | |
471 | }; | |
472 | ||
473 | static struct file_operations pcipcwd_temp_fops = { | |
474 | .owner = THIS_MODULE, | |
475 | .llseek = no_llseek, | |
476 | .read = pcipcwd_temp_read, | |
477 | .open = pcipcwd_temp_open, | |
478 | .release = pcipcwd_temp_release, | |
479 | }; | |
480 | ||
481 | static struct miscdevice pcipcwd_temp_miscdev = { | |
482 | .minor = TEMP_MINOR, | |
483 | .name = "temperature", | |
484 | .fops = &pcipcwd_temp_fops, | |
485 | }; | |
486 | ||
487 | static struct notifier_block pcipcwd_notifier = { | |
488 | .notifier_call = pcipcwd_notify_sys, | |
489 | }; | |
490 | ||
491 | /* | |
492 | * Init & exit routines | |
493 | */ | |
494 | ||
495 | static inline void check_temperature_support(void) | |
496 | { | |
497 | if (inb_p(pcipcwd_private.io_addr) != 0xF0) | |
498 | pcipcwd_private.supports_temp = 1; | |
499 | } | |
500 | ||
501 | static int __devinit pcipcwd_card_init(struct pci_dev *pdev, | |
502 | const struct pci_device_id *ent) | |
503 | { | |
504 | int ret = -EIO; | |
505 | int got_fw_rev, fw_rev_major, fw_rev_minor; | |
506 | char fw_ver_str[20]; | |
507 | char option_switches; | |
508 | ||
509 | cards_found++; | |
510 | if (cards_found == 1) | |
511 | printk(KERN_INFO PFX DRIVER_VERSION); | |
512 | ||
513 | if (cards_found > 1) { | |
514 | printk(KERN_ERR PFX "This driver only supports 1 device\n"); | |
515 | return -ENODEV; | |
516 | } | |
517 | ||
518 | if (pci_enable_device(pdev)) { | |
519 | printk(KERN_ERR PFX "Not possible to enable PCI Device\n"); | |
520 | return -ENODEV; | |
521 | } | |
522 | ||
523 | if (pci_resource_start(pdev, 0) == 0x0000) { | |
524 | printk(KERN_ERR PFX "No I/O-Address for card detected\n"); | |
525 | ret = -ENODEV; | |
526 | goto err_out_disable_device; | |
527 | } | |
528 | ||
529 | pcipcwd_private.pdev = pdev; | |
530 | pcipcwd_private.io_addr = pci_resource_start(pdev, 0); | |
531 | ||
532 | if (pci_request_regions(pdev, WATCHDOG_NAME)) { | |
533 | printk(KERN_ERR PFX "I/O address 0x%04x already in use\n", | |
534 | (int) pcipcwd_private.io_addr); | |
535 | ret = -EIO; | |
536 | goto err_out_disable_device; | |
537 | } | |
538 | ||
539 | /* get the boot_status */ | |
540 | pcipcwd_get_status(&pcipcwd_private.boot_status); | |
541 | ||
542 | /* clear the "card caused reboot" flag */ | |
543 | pcipcwd_clear_status(); | |
544 | ||
545 | /* disable card */ | |
546 | pcipcwd_stop(); | |
547 | ||
548 | /* Check whether or not the card supports the temperature device */ | |
549 | check_temperature_support(); | |
550 | ||
551 | /* Get the Firmware Version */ | |
552 | got_fw_rev = send_command(CMD_GET_FIRMWARE_VERSION, &fw_rev_major, &fw_rev_minor); | |
553 | if (got_fw_rev) { | |
554 | sprintf(fw_ver_str, "%u.%02u", fw_rev_major, fw_rev_minor); | |
555 | } else { | |
556 | sprintf(fw_ver_str, "<card no answer>"); | |
557 | } | |
558 | ||
559 | /* Get switch settings */ | |
560 | option_switches = inb_p(pcipcwd_private.io_addr + 3); | |
561 | ||
562 | printk(KERN_INFO PFX "Found card at port 0x%04x (Firmware: %s) %s temp option\n", | |
563 | (int) pcipcwd_private.io_addr, fw_ver_str, | |
564 | (pcipcwd_private.supports_temp ? "with" : "without")); | |
565 | ||
566 | printk(KERN_INFO PFX "Option switches (0x%02x): Temperature Reset Enable=%s, Power On Delay=%s\n", | |
567 | option_switches, | |
568 | ((option_switches & 0x10) ? "ON" : "OFF"), | |
569 | ((option_switches & 0x08) ? "ON" : "OFF")); | |
570 | ||
571 | if (pcipcwd_private.boot_status & WDIOF_CARDRESET) | |
572 | printk(KERN_INFO PFX "Previous reset was caused by the Watchdog card\n"); | |
573 | ||
574 | if (pcipcwd_private.boot_status & WDIOF_OVERHEAT) | |
575 | printk(KERN_INFO PFX "Card sensed a CPU Overheat\n"); | |
576 | ||
577 | if (pcipcwd_private.boot_status == 0) | |
578 | printk(KERN_INFO PFX "No previous trip detected - Cold boot or reset\n"); | |
579 | ||
580 | /* Check that the heartbeat value is within it's range ; if not reset to the default */ | |
581 | if (pcipcwd_set_heartbeat(heartbeat)) { | |
582 | pcipcwd_set_heartbeat(WATCHDOG_HEARTBEAT); | |
583 | printk(KERN_INFO PFX "heartbeat value must be 0<heartbeat<65536, using %d\n", | |
584 | WATCHDOG_HEARTBEAT); | |
585 | } | |
586 | ||
587 | ret = register_reboot_notifier(&pcipcwd_notifier); | |
588 | if (ret != 0) { | |
589 | printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n", | |
590 | ret); | |
591 | goto err_out_release_region; | |
592 | } | |
593 | ||
594 | if (pcipcwd_private.supports_temp) { | |
595 | ret = misc_register(&pcipcwd_temp_miscdev); | |
596 | if (ret != 0) { | |
597 | printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n", | |
598 | TEMP_MINOR, ret); | |
599 | goto err_out_unregister_reboot; | |
600 | } | |
601 | } | |
602 | ||
603 | ret = misc_register(&pcipcwd_miscdev); | |
604 | if (ret != 0) { | |
605 | printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n", | |
606 | WATCHDOG_MINOR, ret); | |
607 | goto err_out_misc_deregister; | |
608 | } | |
609 | ||
610 | printk(KERN_INFO PFX "initialized. heartbeat=%d sec (nowayout=%d)\n", | |
611 | heartbeat, nowayout); | |
612 | ||
613 | return 0; | |
614 | ||
615 | err_out_misc_deregister: | |
616 | if (pcipcwd_private.supports_temp) | |
617 | misc_deregister(&pcipcwd_temp_miscdev); | |
618 | err_out_unregister_reboot: | |
619 | unregister_reboot_notifier(&pcipcwd_notifier); | |
620 | err_out_release_region: | |
621 | pci_release_regions(pdev); | |
622 | err_out_disable_device: | |
623 | pci_disable_device(pdev); | |
624 | return ret; | |
625 | } | |
626 | ||
627 | static void __devexit pcipcwd_card_exit(struct pci_dev *pdev) | |
628 | { | |
629 | /* Stop the timer before we leave */ | |
630 | if (!nowayout) | |
631 | pcipcwd_stop(); | |
632 | ||
633 | /* Deregister */ | |
634 | misc_deregister(&pcipcwd_miscdev); | |
635 | if (pcipcwd_private.supports_temp) | |
636 | misc_deregister(&pcipcwd_temp_miscdev); | |
637 | unregister_reboot_notifier(&pcipcwd_notifier); | |
638 | pci_release_regions(pdev); | |
639 | pci_disable_device(pdev); | |
640 | cards_found--; | |
641 | } | |
642 | ||
643 | static struct pci_device_id pcipcwd_pci_tbl[] = { | |
644 | { PCI_VENDOR_ID_QUICKLOGIC, PCI_DEVICE_ID_WATCHDOG_PCIPCWD, | |
645 | PCI_ANY_ID, PCI_ANY_ID, }, | |
646 | { 0 }, /* End of list */ | |
647 | }; | |
648 | MODULE_DEVICE_TABLE(pci, pcipcwd_pci_tbl); | |
649 | ||
650 | static struct pci_driver pcipcwd_driver = { | |
651 | .name = WATCHDOG_NAME, | |
652 | .id_table = pcipcwd_pci_tbl, | |
653 | .probe = pcipcwd_card_init, | |
654 | .remove = __devexit_p(pcipcwd_card_exit), | |
655 | }; | |
656 | ||
657 | static int __init pcipcwd_init_module(void) | |
658 | { | |
659 | spin_lock_init (&pcipcwd_private.io_lock); | |
660 | ||
661 | return pci_register_driver(&pcipcwd_driver); | |
662 | } | |
663 | ||
664 | static void __exit pcipcwd_cleanup_module(void) | |
665 | { | |
666 | pci_unregister_driver(&pcipcwd_driver); | |
667 | } | |
668 | ||
669 | module_init(pcipcwd_init_module); | |
670 | module_exit(pcipcwd_cleanup_module); | |
671 | ||
672 | MODULE_AUTHOR("Wim Van Sebroeck <wim@iguana.be>"); | |
673 | MODULE_DESCRIPTION("Berkshire PCI-PC Watchdog driver"); | |
674 | MODULE_LICENSE("GPL"); | |
675 | MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR); | |
676 | MODULE_ALIAS_MISCDEV(TEMP_MINOR); |