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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 */ | |
a0800f6d WVS |
53 | #define WATCHDOG_VERSION "1.02" |
54 | #define WATCHDOG_DATE "03 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 | */ | |
a0800f6d WVS |
73 | /* Port 1 : Control Status #1 */ |
74 | #define WD_PCI_WTRP 0x01 /* Watchdog Trip status */ | |
75 | #define WD_PCI_HRBT 0x02 /* Watchdog Heartbeat */ | |
76 | #define WD_PCI_TTRP 0x04 /* Temperature Trip status */ | |
77 | #define WD_PCI_RL2A 0x08 /* Relay 2 Active */ | |
78 | #define WD_PCI_RL1A 0x10 /* Relay 1 Active */ | |
79 | #define WD_PCI_R2DS 0x40 /* Relay 2 Disable Temperature-trip/reset */ | |
80 | #define WD_PCI_RLY2 0x80 /* Activate Relay 2 on the board */ | |
81 | /* Port 2 : Control Status #2 */ | |
82 | #define WD_PCI_WDIS 0x10 /* Watchdog Disable */ | |
83 | #define WD_PCI_ENTP 0x20 /* Enable Temperature Trip Reset */ | |
84 | #define WD_PCI_WRSP 0x40 /* Watchdog wrote response */ | |
85 | #define WD_PCI_PCMD 0x80 /* PC has sent command */ | |
1da177e4 LT |
86 | |
87 | /* according to documentation max. time to process a command for the pci | |
88 | * watchdog card is 100 ms, so we give it 150 ms to do it's job */ | |
89 | #define PCI_COMMAND_TIMEOUT 150 | |
90 | ||
91 | /* Watchdog's internal commands */ | |
a0800f6d WVS |
92 | #define CMD_GET_STATUS 0x04 |
93 | #define CMD_GET_FIRMWARE_VERSION 0x08 | |
94 | #define CMD_READ_WATCHDOG_TIMEOUT 0x18 | |
95 | #define CMD_WRITE_WATCHDOG_TIMEOUT 0x19 | |
96 | #define CMD_GET_CLEAR_RESET_COUNT 0x84 | |
1da177e4 LT |
97 | |
98 | /* We can only use 1 card due to the /dev/watchdog restriction */ | |
99 | static int cards_found; | |
100 | ||
101 | /* internal variables */ | |
102 | static int temp_panic; | |
103 | static unsigned long is_active; | |
104 | static char expect_release; | |
a0800f6d WVS |
105 | static struct { /* this is private data for each PCI-PC watchdog card */ |
106 | int supports_temp; /* Wether or not the card has a temperature device */ | |
107 | int boot_status; /* The card's boot status */ | |
108 | unsigned long io_addr; /* The cards I/O address */ | |
109 | spinlock_t io_lock; /* the lock for io operations */ | |
110 | struct pci_dev *pdev; /* the PCI-device */ | |
1da177e4 LT |
111 | } pcipcwd_private; |
112 | ||
113 | /* module parameters */ | |
114 | #define WATCHDOG_HEARTBEAT 2 /* 2 sec default heartbeat */ | |
115 | static int heartbeat = WATCHDOG_HEARTBEAT; | |
116 | module_param(heartbeat, int, 0); | |
117 | MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds. (0<heartbeat<65536, default=" __MODULE_STRING(WATCHDOG_HEARTBEAT) ")"); | |
118 | ||
4bfdf378 | 119 | static int nowayout = WATCHDOG_NOWAYOUT; |
1da177e4 LT |
120 | module_param(nowayout, int, 0); |
121 | MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)"); | |
122 | ||
123 | /* | |
124 | * Internal functions | |
125 | */ | |
126 | ||
127 | static int send_command(int cmd, int *msb, int *lsb) | |
128 | { | |
129 | int got_response, count; | |
130 | ||
131 | spin_lock(&pcipcwd_private.io_lock); | |
132 | /* If a command requires data it should be written first. | |
133 | * Data for commands with 8 bits of data should be written to port 4. | |
134 | * Commands with 16 bits of data, should be written as LSB to port 4 | |
135 | * and MSB to port 5. | |
136 | * After the required data has been written then write the command to | |
137 | * port 6. */ | |
138 | outb_p(*lsb, pcipcwd_private.io_addr + 4); | |
139 | outb_p(*msb, pcipcwd_private.io_addr + 5); | |
140 | outb_p(cmd, pcipcwd_private.io_addr + 6); | |
141 | ||
142 | /* wait till the pci card processed the command, signaled by | |
143 | * the WRSP bit in port 2 and give it a max. timeout of | |
144 | * PCI_COMMAND_TIMEOUT to process */ | |
a0800f6d | 145 | got_response = inb_p(pcipcwd_private.io_addr + 2) & WD_PCI_WRSP; |
1da177e4 LT |
146 | for (count = 0; (count < PCI_COMMAND_TIMEOUT) && (!got_response); count++) { |
147 | mdelay(1); | |
a0800f6d | 148 | got_response = inb_p(pcipcwd_private.io_addr + 2) & WD_PCI_WRSP; |
1da177e4 LT |
149 | } |
150 | ||
151 | if (got_response) { | |
152 | /* read back response */ | |
153 | *lsb = inb_p(pcipcwd_private.io_addr + 4); | |
154 | *msb = inb_p(pcipcwd_private.io_addr + 5); | |
155 | ||
156 | /* clear WRSP bit */ | |
157 | inb_p(pcipcwd_private.io_addr + 6); | |
158 | } | |
159 | spin_unlock(&pcipcwd_private.io_lock); | |
160 | ||
161 | return got_response; | |
162 | } | |
163 | ||
a0800f6d WVS |
164 | static inline void pcipcwd_check_temperature_support(void) |
165 | { | |
166 | if (inb_p(pcipcwd_private.io_addr) != 0xF0) | |
167 | pcipcwd_private.supports_temp = 1; | |
168 | } | |
169 | ||
170 | static int pcipcwd_get_option_switches(void) | |
171 | { | |
172 | int option_switches; | |
173 | ||
174 | option_switches = inb_p(pcipcwd_private.io_addr + 3); | |
175 | return option_switches; | |
176 | } | |
177 | ||
178 | static void pcipcwd_show_card_info(void) | |
179 | { | |
180 | int got_fw_rev, fw_rev_major, fw_rev_minor; | |
181 | char fw_ver_str[20]; /* The cards firmware version */ | |
182 | int option_switches; | |
183 | ||
184 | got_fw_rev = send_command(CMD_GET_FIRMWARE_VERSION, &fw_rev_major, &fw_rev_minor); | |
185 | if (got_fw_rev) { | |
186 | sprintf(fw_ver_str, "%u.%02u", fw_rev_major, fw_rev_minor); | |
187 | } else { | |
188 | sprintf(fw_ver_str, "<card no answer>"); | |
189 | } | |
190 | ||
191 | /* Get switch settings */ | |
192 | option_switches = pcipcwd_get_option_switches(); | |
193 | ||
194 | printk(KERN_INFO PFX "Found card at port 0x%04x (Firmware: %s) %s temp option\n", | |
195 | (int) pcipcwd_private.io_addr, fw_ver_str, | |
196 | (pcipcwd_private.supports_temp ? "with" : "without")); | |
197 | ||
198 | printk(KERN_INFO PFX "Option switches (0x%02x): Temperature Reset Enable=%s, Power On Delay=%s\n", | |
199 | option_switches, | |
200 | ((option_switches & 0x10) ? "ON" : "OFF"), | |
201 | ((option_switches & 0x08) ? "ON" : "OFF")); | |
202 | ||
203 | if (pcipcwd_private.boot_status & WDIOF_CARDRESET) | |
204 | printk(KERN_INFO PFX "Previous reset was caused by the Watchdog card\n"); | |
205 | ||
206 | if (pcipcwd_private.boot_status & WDIOF_OVERHEAT) | |
207 | printk(KERN_INFO PFX "Card sensed a CPU Overheat\n"); | |
208 | ||
209 | if (pcipcwd_private.boot_status == 0) | |
210 | printk(KERN_INFO PFX "No previous trip detected - Cold boot or reset\n"); | |
211 | } | |
212 | ||
1da177e4 LT |
213 | static int pcipcwd_start(void) |
214 | { | |
215 | int stat_reg; | |
216 | ||
217 | spin_lock(&pcipcwd_private.io_lock); | |
218 | outb_p(0x00, pcipcwd_private.io_addr + 3); | |
219 | udelay(1000); | |
220 | ||
221 | stat_reg = inb_p(pcipcwd_private.io_addr + 2); | |
222 | spin_unlock(&pcipcwd_private.io_lock); | |
223 | ||
a0800f6d | 224 | if (stat_reg & WD_PCI_WDIS) { |
1da177e4 LT |
225 | printk(KERN_ERR PFX "Card timer not enabled\n"); |
226 | return -1; | |
227 | } | |
228 | ||
229 | return 0; | |
230 | } | |
231 | ||
232 | static int pcipcwd_stop(void) | |
233 | { | |
234 | int stat_reg; | |
235 | ||
236 | spin_lock(&pcipcwd_private.io_lock); | |
237 | outb_p(0xA5, pcipcwd_private.io_addr + 3); | |
238 | udelay(1000); | |
239 | ||
240 | outb_p(0xA5, pcipcwd_private.io_addr + 3); | |
241 | udelay(1000); | |
242 | ||
243 | stat_reg = inb_p(pcipcwd_private.io_addr + 2); | |
244 | spin_unlock(&pcipcwd_private.io_lock); | |
245 | ||
a0800f6d | 246 | if (!(stat_reg & WD_PCI_WDIS)) { |
1da177e4 LT |
247 | printk(KERN_ERR PFX "Card did not acknowledge disable attempt\n"); |
248 | return -1; | |
249 | } | |
250 | ||
251 | return 0; | |
252 | } | |
253 | ||
254 | static int pcipcwd_keepalive(void) | |
255 | { | |
256 | /* Re-trigger watchdog by writing to port 0 */ | |
a0800f6d | 257 | outb_p(0x42, pcipcwd_private.io_addr); /* send out any data */ |
1da177e4 LT |
258 | return 0; |
259 | } | |
260 | ||
261 | static int pcipcwd_set_heartbeat(int t) | |
262 | { | |
263 | int t_msb = t / 256; | |
264 | int t_lsb = t % 256; | |
265 | ||
266 | if ((t < 0x0001) || (t > 0xFFFF)) | |
267 | return -EINVAL; | |
268 | ||
269 | /* Write new heartbeat to watchdog */ | |
270 | send_command(CMD_WRITE_WATCHDOG_TIMEOUT, &t_msb, &t_lsb); | |
271 | ||
272 | heartbeat = t; | |
273 | return 0; | |
274 | } | |
275 | ||
276 | static int pcipcwd_get_status(int *status) | |
277 | { | |
a0800f6d | 278 | int control_status; |
1da177e4 LT |
279 | |
280 | *status=0; | |
a0800f6d WVS |
281 | control_status = inb_p(pcipcwd_private.io_addr + 1); |
282 | if (control_status & WD_PCI_WTRP) | |
1da177e4 | 283 | *status |= WDIOF_CARDRESET; |
a0800f6d | 284 | if (control_status & WD_PCI_TTRP) { |
1da177e4 LT |
285 | *status |= WDIOF_OVERHEAT; |
286 | if (temp_panic) | |
287 | panic(PFX "Temperature overheat trip!\n"); | |
288 | } | |
289 | ||
290 | return 0; | |
291 | } | |
292 | ||
293 | static int pcipcwd_clear_status(void) | |
294 | { | |
a0800f6d WVS |
295 | int control_status; |
296 | int msb; | |
297 | int reset_counter; | |
298 | ||
299 | control_status = inb_p(pcipcwd_private.io_addr + 1); | |
300 | ||
301 | /* clear trip status & LED and keep mode of relay 2 */ | |
302 | outb_p((control_status & WD_PCI_R2DS) | WD_PCI_WTRP, pcipcwd_private.io_addr + 1); | |
303 | ||
304 | /* clear reset counter */ | |
305 | msb=0; | |
306 | reset_counter=0xff; | |
307 | send_command(CMD_GET_CLEAR_RESET_COUNT, &msb, &reset_counter); | |
308 | ||
1da177e4 LT |
309 | return 0; |
310 | } | |
311 | ||
312 | static int pcipcwd_get_temperature(int *temperature) | |
313 | { | |
314 | *temperature = 0; | |
315 | if (!pcipcwd_private.supports_temp) | |
316 | return -ENODEV; | |
317 | ||
a0800f6d WVS |
318 | *temperature = inb_p(pcipcwd_private.io_addr); |
319 | ||
1da177e4 LT |
320 | /* |
321 | * Convert celsius to fahrenheit, since this was | |
322 | * the decided 'standard' for this return value. | |
323 | */ | |
a0800f6d | 324 | *temperature = (*temperature * 9 / 5) + 32; |
1da177e4 LT |
325 | |
326 | return 0; | |
327 | } | |
328 | ||
329 | /* | |
330 | * /dev/watchdog handling | |
331 | */ | |
332 | ||
333 | static ssize_t pcipcwd_write(struct file *file, const char __user *data, | |
a0800f6d | 334 | size_t len, loff_t *ppos) |
1da177e4 LT |
335 | { |
336 | /* See if we got the magic character 'V' and reload the timer */ | |
337 | if (len) { | |
338 | if (!nowayout) { | |
339 | size_t i; | |
340 | ||
341 | /* note: just in case someone wrote the magic character | |
342 | * five months ago... */ | |
343 | expect_release = 0; | |
344 | ||
345 | /* scan to see whether or not we got the magic character */ | |
346 | for (i = 0; i != len; i++) { | |
347 | char c; | |
348 | if(get_user(c, data+i)) | |
349 | return -EFAULT; | |
350 | if (c == 'V') | |
351 | expect_release = 42; | |
352 | } | |
353 | } | |
354 | ||
355 | /* someone wrote to us, we should reload the timer */ | |
356 | pcipcwd_keepalive(); | |
357 | } | |
358 | return len; | |
359 | } | |
360 | ||
361 | static int pcipcwd_ioctl(struct inode *inode, struct file *file, | |
362 | unsigned int cmd, unsigned long arg) | |
363 | { | |
364 | void __user *argp = (void __user *)arg; | |
365 | int __user *p = argp; | |
366 | static struct watchdog_info ident = { | |
367 | .options = WDIOF_OVERHEAT | | |
368 | WDIOF_CARDRESET | | |
369 | WDIOF_KEEPALIVEPING | | |
370 | WDIOF_SETTIMEOUT | | |
371 | WDIOF_MAGICCLOSE, | |
372 | .firmware_version = 1, | |
373 | .identity = WATCHDOG_DRIVER_NAME, | |
374 | }; | |
375 | ||
376 | switch (cmd) { | |
377 | case WDIOC_GETSUPPORT: | |
378 | return copy_to_user(argp, &ident, | |
379 | sizeof (ident)) ? -EFAULT : 0; | |
380 | ||
381 | case WDIOC_GETSTATUS: | |
382 | { | |
383 | int status; | |
384 | ||
385 | pcipcwd_get_status(&status); | |
386 | ||
387 | return put_user(status, p); | |
388 | } | |
389 | ||
390 | case WDIOC_GETBOOTSTATUS: | |
391 | return put_user(pcipcwd_private.boot_status, p); | |
392 | ||
393 | case WDIOC_GETTEMP: | |
394 | { | |
395 | int temperature; | |
396 | ||
397 | if (pcipcwd_get_temperature(&temperature)) | |
398 | return -EFAULT; | |
399 | ||
400 | return put_user(temperature, p); | |
401 | } | |
402 | ||
403 | case WDIOC_KEEPALIVE: | |
404 | pcipcwd_keepalive(); | |
405 | return 0; | |
406 | ||
407 | case WDIOC_SETOPTIONS: | |
408 | { | |
409 | int new_options, retval = -EINVAL; | |
410 | ||
411 | if (get_user (new_options, p)) | |
412 | return -EFAULT; | |
413 | ||
414 | if (new_options & WDIOS_DISABLECARD) { | |
c315b7e8 WVS |
415 | if (pcipcwd_stop()) |
416 | return -EIO; | |
1da177e4 LT |
417 | retval = 0; |
418 | } | |
419 | ||
420 | if (new_options & WDIOS_ENABLECARD) { | |
c315b7e8 WVS |
421 | if (pcipcwd_start()) |
422 | return -EIO; | |
1da177e4 LT |
423 | retval = 0; |
424 | } | |
425 | ||
426 | if (new_options & WDIOS_TEMPPANIC) { | |
427 | temp_panic = 1; | |
428 | retval = 0; | |
429 | } | |
430 | ||
431 | return retval; | |
432 | } | |
433 | ||
434 | case WDIOC_SETTIMEOUT: | |
435 | { | |
436 | int new_heartbeat; | |
437 | ||
438 | if (get_user(new_heartbeat, p)) | |
439 | return -EFAULT; | |
440 | ||
441 | if (pcipcwd_set_heartbeat(new_heartbeat)) | |
442 | return -EINVAL; | |
443 | ||
444 | pcipcwd_keepalive(); | |
445 | /* Fall */ | |
446 | } | |
447 | ||
448 | case WDIOC_GETTIMEOUT: | |
449 | return put_user(heartbeat, p); | |
450 | ||
451 | default: | |
452 | return -ENOIOCTLCMD; | |
453 | } | |
454 | } | |
455 | ||
456 | static int pcipcwd_open(struct inode *inode, struct file *file) | |
457 | { | |
458 | /* /dev/watchdog can only be opened once */ | |
a0800f6d | 459 | if (test_and_set_bit(0, &is_active)) { |
1da177e4 | 460 | return -EBUSY; |
a0800f6d | 461 | } |
1da177e4 LT |
462 | |
463 | /* Activate */ | |
464 | pcipcwd_start(); | |
465 | pcipcwd_keepalive(); | |
466 | return nonseekable_open(inode, file); | |
467 | } | |
468 | ||
469 | static int pcipcwd_release(struct inode *inode, struct file *file) | |
470 | { | |
471 | /* | |
472 | * Shut off the timer. | |
473 | */ | |
474 | if (expect_release == 42) { | |
475 | pcipcwd_stop(); | |
476 | } else { | |
477 | printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n"); | |
478 | pcipcwd_keepalive(); | |
479 | } | |
480 | expect_release = 0; | |
481 | clear_bit(0, &is_active); | |
482 | return 0; | |
483 | } | |
484 | ||
485 | /* | |
486 | * /dev/temperature handling | |
487 | */ | |
488 | ||
489 | static ssize_t pcipcwd_temp_read(struct file *file, char __user *data, | |
490 | size_t len, loff_t *ppos) | |
491 | { | |
492 | int temperature; | |
493 | ||
494 | if (pcipcwd_get_temperature(&temperature)) | |
495 | return -EFAULT; | |
496 | ||
497 | if (copy_to_user (data, &temperature, 1)) | |
498 | return -EFAULT; | |
499 | ||
500 | return 1; | |
501 | } | |
502 | ||
503 | static int pcipcwd_temp_open(struct inode *inode, struct file *file) | |
504 | { | |
505 | if (!pcipcwd_private.supports_temp) | |
506 | return -ENODEV; | |
507 | ||
508 | return nonseekable_open(inode, file); | |
509 | } | |
510 | ||
511 | static int pcipcwd_temp_release(struct inode *inode, struct file *file) | |
512 | { | |
513 | return 0; | |
514 | } | |
515 | ||
516 | /* | |
517 | * Notify system | |
518 | */ | |
519 | ||
520 | static int pcipcwd_notify_sys(struct notifier_block *this, unsigned long code, void *unused) | |
521 | { | |
522 | if (code==SYS_DOWN || code==SYS_HALT) { | |
523 | /* Turn the WDT off */ | |
524 | pcipcwd_stop(); | |
525 | } | |
526 | ||
527 | return NOTIFY_DONE; | |
528 | } | |
529 | ||
530 | /* | |
531 | * Kernel Interfaces | |
532 | */ | |
533 | ||
534 | static struct file_operations pcipcwd_fops = { | |
535 | .owner = THIS_MODULE, | |
536 | .llseek = no_llseek, | |
537 | .write = pcipcwd_write, | |
538 | .ioctl = pcipcwd_ioctl, | |
539 | .open = pcipcwd_open, | |
540 | .release = pcipcwd_release, | |
541 | }; | |
542 | ||
543 | static struct miscdevice pcipcwd_miscdev = { | |
544 | .minor = WATCHDOG_MINOR, | |
545 | .name = "watchdog", | |
546 | .fops = &pcipcwd_fops, | |
547 | }; | |
548 | ||
549 | static struct file_operations pcipcwd_temp_fops = { | |
550 | .owner = THIS_MODULE, | |
551 | .llseek = no_llseek, | |
552 | .read = pcipcwd_temp_read, | |
553 | .open = pcipcwd_temp_open, | |
554 | .release = pcipcwd_temp_release, | |
555 | }; | |
556 | ||
557 | static struct miscdevice pcipcwd_temp_miscdev = { | |
558 | .minor = TEMP_MINOR, | |
559 | .name = "temperature", | |
560 | .fops = &pcipcwd_temp_fops, | |
561 | }; | |
562 | ||
563 | static struct notifier_block pcipcwd_notifier = { | |
564 | .notifier_call = pcipcwd_notify_sys, | |
565 | }; | |
566 | ||
567 | /* | |
568 | * Init & exit routines | |
569 | */ | |
570 | ||
1da177e4 LT |
571 | static int __devinit pcipcwd_card_init(struct pci_dev *pdev, |
572 | const struct pci_device_id *ent) | |
573 | { | |
574 | int ret = -EIO; | |
1da177e4 LT |
575 | |
576 | cards_found++; | |
577 | if (cards_found == 1) | |
578 | printk(KERN_INFO PFX DRIVER_VERSION); | |
579 | ||
580 | if (cards_found > 1) { | |
581 | printk(KERN_ERR PFX "This driver only supports 1 device\n"); | |
582 | return -ENODEV; | |
583 | } | |
584 | ||
585 | if (pci_enable_device(pdev)) { | |
586 | printk(KERN_ERR PFX "Not possible to enable PCI Device\n"); | |
587 | return -ENODEV; | |
588 | } | |
589 | ||
590 | if (pci_resource_start(pdev, 0) == 0x0000) { | |
591 | printk(KERN_ERR PFX "No I/O-Address for card detected\n"); | |
592 | ret = -ENODEV; | |
593 | goto err_out_disable_device; | |
594 | } | |
595 | ||
596 | pcipcwd_private.pdev = pdev; | |
597 | pcipcwd_private.io_addr = pci_resource_start(pdev, 0); | |
598 | ||
599 | if (pci_request_regions(pdev, WATCHDOG_NAME)) { | |
600 | printk(KERN_ERR PFX "I/O address 0x%04x already in use\n", | |
601 | (int) pcipcwd_private.io_addr); | |
602 | ret = -EIO; | |
603 | goto err_out_disable_device; | |
604 | } | |
605 | ||
606 | /* get the boot_status */ | |
607 | pcipcwd_get_status(&pcipcwd_private.boot_status); | |
608 | ||
609 | /* clear the "card caused reboot" flag */ | |
610 | pcipcwd_clear_status(); | |
611 | ||
612 | /* disable card */ | |
613 | pcipcwd_stop(); | |
614 | ||
615 | /* Check whether or not the card supports the temperature device */ | |
a0800f6d | 616 | pcipcwd_check_temperature_support(); |
1da177e4 | 617 | |
a0800f6d WVS |
618 | /* Show info about the card itself */ |
619 | pcipcwd_show_card_info(); | |
1da177e4 LT |
620 | |
621 | /* Check that the heartbeat value is within it's range ; if not reset to the default */ | |
622 | if (pcipcwd_set_heartbeat(heartbeat)) { | |
623 | pcipcwd_set_heartbeat(WATCHDOG_HEARTBEAT); | |
624 | printk(KERN_INFO PFX "heartbeat value must be 0<heartbeat<65536, using %d\n", | |
625 | WATCHDOG_HEARTBEAT); | |
626 | } | |
627 | ||
628 | ret = register_reboot_notifier(&pcipcwd_notifier); | |
629 | if (ret != 0) { | |
630 | printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n", | |
631 | ret); | |
632 | goto err_out_release_region; | |
633 | } | |
634 | ||
635 | if (pcipcwd_private.supports_temp) { | |
636 | ret = misc_register(&pcipcwd_temp_miscdev); | |
637 | if (ret != 0) { | |
638 | printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n", | |
639 | TEMP_MINOR, ret); | |
640 | goto err_out_unregister_reboot; | |
641 | } | |
642 | } | |
643 | ||
644 | ret = misc_register(&pcipcwd_miscdev); | |
645 | if (ret != 0) { | |
646 | printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n", | |
647 | WATCHDOG_MINOR, ret); | |
648 | goto err_out_misc_deregister; | |
649 | } | |
650 | ||
651 | printk(KERN_INFO PFX "initialized. heartbeat=%d sec (nowayout=%d)\n", | |
652 | heartbeat, nowayout); | |
653 | ||
654 | return 0; | |
655 | ||
656 | err_out_misc_deregister: | |
657 | if (pcipcwd_private.supports_temp) | |
658 | misc_deregister(&pcipcwd_temp_miscdev); | |
659 | err_out_unregister_reboot: | |
660 | unregister_reboot_notifier(&pcipcwd_notifier); | |
661 | err_out_release_region: | |
662 | pci_release_regions(pdev); | |
663 | err_out_disable_device: | |
664 | pci_disable_device(pdev); | |
665 | return ret; | |
666 | } | |
667 | ||
668 | static void __devexit pcipcwd_card_exit(struct pci_dev *pdev) | |
669 | { | |
670 | /* Stop the timer before we leave */ | |
671 | if (!nowayout) | |
672 | pcipcwd_stop(); | |
673 | ||
674 | /* Deregister */ | |
675 | misc_deregister(&pcipcwd_miscdev); | |
676 | if (pcipcwd_private.supports_temp) | |
677 | misc_deregister(&pcipcwd_temp_miscdev); | |
678 | unregister_reboot_notifier(&pcipcwd_notifier); | |
679 | pci_release_regions(pdev); | |
680 | pci_disable_device(pdev); | |
681 | cards_found--; | |
682 | } | |
683 | ||
684 | static struct pci_device_id pcipcwd_pci_tbl[] = { | |
685 | { PCI_VENDOR_ID_QUICKLOGIC, PCI_DEVICE_ID_WATCHDOG_PCIPCWD, | |
686 | PCI_ANY_ID, PCI_ANY_ID, }, | |
687 | { 0 }, /* End of list */ | |
688 | }; | |
689 | MODULE_DEVICE_TABLE(pci, pcipcwd_pci_tbl); | |
690 | ||
691 | static struct pci_driver pcipcwd_driver = { | |
692 | .name = WATCHDOG_NAME, | |
693 | .id_table = pcipcwd_pci_tbl, | |
694 | .probe = pcipcwd_card_init, | |
695 | .remove = __devexit_p(pcipcwd_card_exit), | |
696 | }; | |
697 | ||
698 | static int __init pcipcwd_init_module(void) | |
699 | { | |
a0800f6d | 700 | spin_lock_init(&pcipcwd_private.io_lock); |
1da177e4 LT |
701 | |
702 | return pci_register_driver(&pcipcwd_driver); | |
703 | } | |
704 | ||
705 | static void __exit pcipcwd_cleanup_module(void) | |
706 | { | |
707 | pci_unregister_driver(&pcipcwd_driver); | |
708 | } | |
709 | ||
710 | module_init(pcipcwd_init_module); | |
711 | module_exit(pcipcwd_cleanup_module); | |
712 | ||
713 | MODULE_AUTHOR("Wim Van Sebroeck <wim@iguana.be>"); | |
714 | MODULE_DESCRIPTION("Berkshire PCI-PC Watchdog driver"); | |
715 | MODULE_LICENSE("GPL"); | |
716 | MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR); | |
717 | MODULE_ALIAS_MISCDEV(TEMP_MINOR); |