Pull new-efi-memmap into release branch
[linux-2.6] / drivers / char / watchdog / pcwd_pci.c
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
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/... */
51
52 /* Module and version information */
53 #define WATCHDOG_VERSION "1.02"
54 #define WATCHDOG_DATE "03 Sep 2005"
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 /* 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 */
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 */
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
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;
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 */
111 } pcipcwd_private;
112
113 /* module parameters */
114 #define QUIET   0       /* Default */
115 #define VERBOSE 1       /* Verbose */
116 #define DEBUG   2       /* print fancy stuff too */
117 static int debug = QUIET;
118 module_param(debug, int, 0);
119 MODULE_PARM_DESC(debug, "Debug level: 0=Quiet, 1=Verbose, 2=Debug (default=0)");
120
121 #define WATCHDOG_HEARTBEAT 2    /* 2 sec default heartbeat */
122 static int heartbeat = WATCHDOG_HEARTBEAT;
123 module_param(heartbeat, int, 0);
124 MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds. (0<heartbeat<65536, default=" __MODULE_STRING(WATCHDOG_HEARTBEAT) ")");
125
126 static int nowayout = WATCHDOG_NOWAYOUT;
127 module_param(nowayout, int, 0);
128 MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)");
129
130 /*
131  *      Internal functions
132  */
133
134 static int send_command(int cmd, int *msb, int *lsb)
135 {
136         int got_response, count;
137
138         if (debug >= DEBUG)
139                 printk(KERN_DEBUG PFX "sending following data cmd=0x%02x msb=0x%02x lsb=0x%02x\n",
140                 cmd, *msb, *lsb);
141
142         spin_lock(&pcipcwd_private.io_lock);
143         /* If a command requires data it should be written first.
144          * Data for commands with 8 bits of data should be written to port 4.
145          * Commands with 16 bits of data, should be written as LSB to port 4
146          * and MSB to port 5.
147          * After the required data has been written then write the command to
148          * port 6. */
149         outb_p(*lsb, pcipcwd_private.io_addr + 4);
150         outb_p(*msb, pcipcwd_private.io_addr + 5);
151         outb_p(cmd, pcipcwd_private.io_addr + 6);
152
153         /* wait till the pci card processed the command, signaled by
154          * the WRSP bit in port 2 and give it a max. timeout of
155          * PCI_COMMAND_TIMEOUT to process */
156         got_response = inb_p(pcipcwd_private.io_addr + 2) & WD_PCI_WRSP;
157         for (count = 0; (count < PCI_COMMAND_TIMEOUT) && (!got_response); count++) {
158                 mdelay(1);
159                 got_response = inb_p(pcipcwd_private.io_addr + 2) & WD_PCI_WRSP;
160         }
161
162         if (debug >= DEBUG) {
163                 if (got_response) {
164                         printk(KERN_DEBUG PFX "time to process command was: %d ms\n",
165                                 count);
166                 } else {
167                         printk(KERN_DEBUG PFX "card did not respond on command!\n");
168                 }
169         }
170
171         if (got_response) {
172                 /* read back response */
173                 *lsb = inb_p(pcipcwd_private.io_addr + 4);
174                 *msb = inb_p(pcipcwd_private.io_addr + 5);
175
176                 /* clear WRSP bit */
177                 inb_p(pcipcwd_private.io_addr + 6);
178
179                 if (debug >= DEBUG)
180                         printk(KERN_DEBUG PFX "received following data for cmd=0x%02x: msb=0x%02x lsb=0x%02x\n",
181                                 cmd, *msb, *lsb);
182         }
183
184         spin_unlock(&pcipcwd_private.io_lock);
185
186         return got_response;
187 }
188
189 static inline void pcipcwd_check_temperature_support(void)
190 {
191         if (inb_p(pcipcwd_private.io_addr) != 0xF0)
192                 pcipcwd_private.supports_temp = 1;
193 }
194
195 static int pcipcwd_get_option_switches(void)
196 {
197         int option_switches;
198
199         option_switches = inb_p(pcipcwd_private.io_addr + 3);
200         return option_switches;
201 }
202
203 static void pcipcwd_show_card_info(void)
204 {
205         int got_fw_rev, fw_rev_major, fw_rev_minor;
206         char fw_ver_str[20];            /* The cards firmware version */
207         int option_switches;
208
209         got_fw_rev = send_command(CMD_GET_FIRMWARE_VERSION, &fw_rev_major, &fw_rev_minor);
210         if (got_fw_rev) {
211                 sprintf(fw_ver_str, "%u.%02u", fw_rev_major, fw_rev_minor);
212         } else {
213                 sprintf(fw_ver_str, "<card no answer>");
214         }
215
216         /* Get switch settings */
217         option_switches = pcipcwd_get_option_switches();
218
219         printk(KERN_INFO PFX "Found card at port 0x%04x (Firmware: %s) %s temp option\n",
220                 (int) pcipcwd_private.io_addr, fw_ver_str,
221                 (pcipcwd_private.supports_temp ? "with" : "without"));
222
223         printk(KERN_INFO PFX "Option switches (0x%02x): Temperature Reset Enable=%s, Power On Delay=%s\n",
224                 option_switches,
225                 ((option_switches & 0x10) ? "ON" : "OFF"),
226                 ((option_switches & 0x08) ? "ON" : "OFF"));
227
228         if (pcipcwd_private.boot_status & WDIOF_CARDRESET)
229                 printk(KERN_INFO PFX "Previous reset was caused by the Watchdog card\n");
230
231         if (pcipcwd_private.boot_status & WDIOF_OVERHEAT)
232                 printk(KERN_INFO PFX "Card sensed a CPU Overheat\n");
233
234         if (pcipcwd_private.boot_status == 0)
235                 printk(KERN_INFO PFX "No previous trip detected - Cold boot or reset\n");
236 }
237
238 static int pcipcwd_start(void)
239 {
240         int stat_reg;
241
242         spin_lock(&pcipcwd_private.io_lock);
243         outb_p(0x00, pcipcwd_private.io_addr + 3);
244         udelay(1000);
245
246         stat_reg = inb_p(pcipcwd_private.io_addr + 2);
247         spin_unlock(&pcipcwd_private.io_lock);
248
249         if (stat_reg & WD_PCI_WDIS) {
250                 printk(KERN_ERR PFX "Card timer not enabled\n");
251                 return -1;
252         }
253
254         if (debug >= VERBOSE)
255                 printk(KERN_DEBUG PFX "Watchdog started\n");
256
257         return 0;
258 }
259
260 static int pcipcwd_stop(void)
261 {
262         int stat_reg;
263
264         spin_lock(&pcipcwd_private.io_lock);
265         outb_p(0xA5, pcipcwd_private.io_addr + 3);
266         udelay(1000);
267
268         outb_p(0xA5, pcipcwd_private.io_addr + 3);
269         udelay(1000);
270
271         stat_reg = inb_p(pcipcwd_private.io_addr + 2);
272         spin_unlock(&pcipcwd_private.io_lock);
273
274         if (!(stat_reg & WD_PCI_WDIS)) {
275                 printk(KERN_ERR PFX "Card did not acknowledge disable attempt\n");
276                 return -1;
277         }
278
279         if (debug >= VERBOSE)
280                 printk(KERN_DEBUG PFX "Watchdog stopped\n");
281
282         return 0;
283 }
284
285 static int pcipcwd_keepalive(void)
286 {
287         /* Re-trigger watchdog by writing to port 0 */
288         outb_p(0x42, pcipcwd_private.io_addr);  /* send out any data */
289
290         if (debug >= DEBUG)
291                 printk(KERN_DEBUG PFX "Watchdog keepalive signal send\n");
292
293         return 0;
294 }
295
296 static int pcipcwd_set_heartbeat(int t)
297 {
298         int t_msb = t / 256;
299         int t_lsb = t % 256;
300
301         if ((t < 0x0001) || (t > 0xFFFF))
302                 return -EINVAL;
303
304         /* Write new heartbeat to watchdog */
305         send_command(CMD_WRITE_WATCHDOG_TIMEOUT, &t_msb, &t_lsb);
306
307         heartbeat = t;
308         if (debug >= VERBOSE)
309                 printk(KERN_DEBUG PFX "New heartbeat: %d\n",
310                        heartbeat);
311
312         return 0;
313 }
314
315 static int pcipcwd_get_status(int *status)
316 {
317         int control_status;
318
319         *status=0;
320         control_status = inb_p(pcipcwd_private.io_addr + 1);
321         if (control_status & WD_PCI_WTRP)
322                 *status |= WDIOF_CARDRESET;
323         if (control_status & WD_PCI_TTRP) {
324                 *status |= WDIOF_OVERHEAT;
325                 if (temp_panic)
326                         panic(PFX "Temperature overheat trip!\n");
327         }
328
329         if (debug >= DEBUG)
330                 printk(KERN_DEBUG PFX "Control Status #1: 0x%02x\n",
331                        control_status);
332
333         return 0;
334 }
335
336 static int pcipcwd_clear_status(void)
337 {
338         int control_status;
339         int msb;
340         int reset_counter;
341
342         if (debug >= VERBOSE)
343                 printk(KERN_INFO PFX "clearing watchdog trip status & LED\n");
344
345         control_status = inb_p(pcipcwd_private.io_addr + 1);
346
347         if (debug >= DEBUG) {
348                 printk(KERN_DEBUG PFX "status was: 0x%02x\n", control_status);
349                 printk(KERN_DEBUG PFX "sending: 0x%02x\n",
350                        (control_status & WD_PCI_R2DS) | WD_PCI_WTRP);
351         }
352
353         /* clear trip status & LED and keep mode of relay 2 */
354         outb_p((control_status & WD_PCI_R2DS) | WD_PCI_WTRP, pcipcwd_private.io_addr + 1);
355
356         /* clear reset counter */
357         msb=0;
358         reset_counter=0xff;
359         send_command(CMD_GET_CLEAR_RESET_COUNT, &msb, &reset_counter);
360
361         if (debug >= DEBUG) {
362                 printk(KERN_DEBUG PFX "reset count was: 0x%02x\n",
363                        reset_counter);
364         }
365
366         return 0;
367 }
368
369 static int pcipcwd_get_temperature(int *temperature)
370 {
371         *temperature = 0;
372         if (!pcipcwd_private.supports_temp)
373                 return -ENODEV;
374
375         *temperature = inb_p(pcipcwd_private.io_addr);
376
377         /*
378          * Convert celsius to fahrenheit, since this was
379          * the decided 'standard' for this return value.
380          */
381         *temperature = (*temperature * 9 / 5) + 32;
382
383         if (debug >= DEBUG) {
384                 printk(KERN_DEBUG PFX "temperature is: %d F\n",
385                        *temperature);
386         }
387
388         return 0;
389 }
390
391 /*
392  *      /dev/watchdog handling
393  */
394
395 static ssize_t pcipcwd_write(struct file *file, const char __user *data,
396                              size_t len, loff_t *ppos)
397 {
398         /* See if we got the magic character 'V' and reload the timer */
399         if (len) {
400                 if (!nowayout) {
401                         size_t i;
402
403                         /* note: just in case someone wrote the magic character
404                          * five months ago... */
405                         expect_release = 0;
406
407                         /* scan to see whether or not we got the magic character */
408                         for (i = 0; i != len; i++) {
409                                 char c;
410                                 if(get_user(c, data+i))
411                                         return -EFAULT;
412                                 if (c == 'V')
413                                         expect_release = 42;
414                         }
415                 }
416
417                 /* someone wrote to us, we should reload the timer */
418                 pcipcwd_keepalive();
419         }
420         return len;
421 }
422
423 static int pcipcwd_ioctl(struct inode *inode, struct file *file,
424                           unsigned int cmd, unsigned long arg)
425 {
426         void __user *argp = (void __user *)arg;
427         int __user *p = argp;
428         static struct watchdog_info ident = {
429                 .options =              WDIOF_OVERHEAT |
430                                         WDIOF_CARDRESET |
431                                         WDIOF_KEEPALIVEPING |
432                                         WDIOF_SETTIMEOUT |
433                                         WDIOF_MAGICCLOSE,
434                 .firmware_version =     1,
435                 .identity =             WATCHDOG_DRIVER_NAME,
436         };
437
438         switch (cmd) {
439                 case WDIOC_GETSUPPORT:
440                         return copy_to_user(argp, &ident,
441                                 sizeof (ident)) ? -EFAULT : 0;
442
443                 case WDIOC_GETSTATUS:
444                 {
445                         int status;
446
447                         pcipcwd_get_status(&status);
448
449                         return put_user(status, p);
450                 }
451
452                 case WDIOC_GETBOOTSTATUS:
453                         return put_user(pcipcwd_private.boot_status, p);
454
455                 case WDIOC_GETTEMP:
456                 {
457                         int temperature;
458
459                         if (pcipcwd_get_temperature(&temperature))
460                                 return -EFAULT;
461
462                         return put_user(temperature, p);
463                 }
464
465                 case WDIOC_KEEPALIVE:
466                         pcipcwd_keepalive();
467                         return 0;
468
469                 case WDIOC_SETOPTIONS:
470                 {
471                         int new_options, retval = -EINVAL;
472
473                         if (get_user (new_options, p))
474                                 return -EFAULT;
475
476                         if (new_options & WDIOS_DISABLECARD) {
477                                 if (pcipcwd_stop())
478                                         return -EIO;
479                                 retval = 0;
480                         }
481
482                         if (new_options & WDIOS_ENABLECARD) {
483                                 if (pcipcwd_start())
484                                         return -EIO;
485                                 retval = 0;
486                         }
487
488                         if (new_options & WDIOS_TEMPPANIC) {
489                                 temp_panic = 1;
490                                 retval = 0;
491                         }
492
493                         return retval;
494                 }
495
496                 case WDIOC_SETTIMEOUT:
497                 {
498                         int new_heartbeat;
499
500                         if (get_user(new_heartbeat, p))
501                                 return -EFAULT;
502
503                         if (pcipcwd_set_heartbeat(new_heartbeat))
504                             return -EINVAL;
505
506                         pcipcwd_keepalive();
507                         /* Fall */
508                 }
509
510                 case WDIOC_GETTIMEOUT:
511                         return put_user(heartbeat, p);
512
513                 default:
514                         return -ENOIOCTLCMD;
515         }
516 }
517
518 static int pcipcwd_open(struct inode *inode, struct file *file)
519 {
520         /* /dev/watchdog can only be opened once */
521         if (test_and_set_bit(0, &is_active)) {
522                 if (debug >= VERBOSE)
523                         printk(KERN_ERR PFX "Attempt to open already opened device.\n");
524                 return -EBUSY;
525         }
526
527         /* Activate */
528         pcipcwd_start();
529         pcipcwd_keepalive();
530         return nonseekable_open(inode, file);
531 }
532
533 static int pcipcwd_release(struct inode *inode, struct file *file)
534 {
535         /*
536          *      Shut off the timer.
537          */
538         if (expect_release == 42) {
539                 pcipcwd_stop();
540         } else {
541                 printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n");
542                 pcipcwd_keepalive();
543         }
544         expect_release = 0;
545         clear_bit(0, &is_active);
546         return 0;
547 }
548
549 /*
550  *      /dev/temperature handling
551  */
552
553 static ssize_t pcipcwd_temp_read(struct file *file, char __user *data,
554                                 size_t len, loff_t *ppos)
555 {
556         int temperature;
557
558         if (pcipcwd_get_temperature(&temperature))
559                 return -EFAULT;
560
561         if (copy_to_user (data, &temperature, 1))
562                 return -EFAULT;
563
564         return 1;
565 }
566
567 static int pcipcwd_temp_open(struct inode *inode, struct file *file)
568 {
569         if (!pcipcwd_private.supports_temp)
570                 return -ENODEV;
571
572         return nonseekable_open(inode, file);
573 }
574
575 static int pcipcwd_temp_release(struct inode *inode, struct file *file)
576 {
577         return 0;
578 }
579
580 /*
581  *      Notify system
582  */
583
584 static int pcipcwd_notify_sys(struct notifier_block *this, unsigned long code, void *unused)
585 {
586         if (code==SYS_DOWN || code==SYS_HALT) {
587                 /* Turn the WDT off */
588                 pcipcwd_stop();
589         }
590
591         return NOTIFY_DONE;
592 }
593
594 /*
595  *      Kernel Interfaces
596  */
597
598 static struct file_operations pcipcwd_fops = {
599         .owner =        THIS_MODULE,
600         .llseek =       no_llseek,
601         .write =        pcipcwd_write,
602         .ioctl =        pcipcwd_ioctl,
603         .open =         pcipcwd_open,
604         .release =      pcipcwd_release,
605 };
606
607 static struct miscdevice pcipcwd_miscdev = {
608         .minor =        WATCHDOG_MINOR,
609         .name =         "watchdog",
610         .fops =         &pcipcwd_fops,
611 };
612
613 static struct file_operations pcipcwd_temp_fops = {
614         .owner =        THIS_MODULE,
615         .llseek =       no_llseek,
616         .read =         pcipcwd_temp_read,
617         .open =         pcipcwd_temp_open,
618         .release =      pcipcwd_temp_release,
619 };
620
621 static struct miscdevice pcipcwd_temp_miscdev = {
622         .minor =        TEMP_MINOR,
623         .name =         "temperature",
624         .fops =         &pcipcwd_temp_fops,
625 };
626
627 static struct notifier_block pcipcwd_notifier = {
628         .notifier_call =        pcipcwd_notify_sys,
629 };
630
631 /*
632  *      Init & exit routines
633  */
634
635 static int __devinit pcipcwd_card_init(struct pci_dev *pdev,
636                 const struct pci_device_id *ent)
637 {
638         int ret = -EIO;
639
640         cards_found++;
641         if (cards_found == 1)
642                 printk(KERN_INFO PFX DRIVER_VERSION);
643
644         if (cards_found > 1) {
645                 printk(KERN_ERR PFX "This driver only supports 1 device\n");
646                 return -ENODEV;
647         }
648
649         if (pci_enable_device(pdev)) {
650                 printk(KERN_ERR PFX "Not possible to enable PCI Device\n");
651                 return -ENODEV;
652         }
653
654         if (pci_resource_start(pdev, 0) == 0x0000) {
655                 printk(KERN_ERR PFX "No I/O-Address for card detected\n");
656                 ret = -ENODEV;
657                 goto err_out_disable_device;
658         }
659
660         pcipcwd_private.pdev = pdev;
661         pcipcwd_private.io_addr = pci_resource_start(pdev, 0);
662
663         if (pci_request_regions(pdev, WATCHDOG_NAME)) {
664                 printk(KERN_ERR PFX "I/O address 0x%04x already in use\n",
665                         (int) pcipcwd_private.io_addr);
666                 ret = -EIO;
667                 goto err_out_disable_device;
668         }
669
670         /* get the boot_status */
671         pcipcwd_get_status(&pcipcwd_private.boot_status);
672
673         /* clear the "card caused reboot" flag */
674         pcipcwd_clear_status();
675
676         /* disable card */
677         pcipcwd_stop();
678
679         /* Check whether or not the card supports the temperature device */
680         pcipcwd_check_temperature_support();
681
682         /* Show info about the card itself */
683         pcipcwd_show_card_info();
684
685         /* Check that the heartbeat value is within it's range ; if not reset to the default */
686         if (pcipcwd_set_heartbeat(heartbeat)) {
687                 pcipcwd_set_heartbeat(WATCHDOG_HEARTBEAT);
688                 printk(KERN_INFO PFX "heartbeat value must be 0<heartbeat<65536, using %d\n",
689                         WATCHDOG_HEARTBEAT);
690         }
691
692         ret = register_reboot_notifier(&pcipcwd_notifier);
693         if (ret != 0) {
694                 printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
695                         ret);
696                 goto err_out_release_region;
697         }
698
699         if (pcipcwd_private.supports_temp) {
700                 ret = misc_register(&pcipcwd_temp_miscdev);
701                 if (ret != 0) {
702                         printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
703                                 TEMP_MINOR, ret);
704                         goto err_out_unregister_reboot;
705                 }
706         }
707
708         ret = misc_register(&pcipcwd_miscdev);
709         if (ret != 0) {
710                 printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
711                         WATCHDOG_MINOR, ret);
712                 goto err_out_misc_deregister;
713         }
714
715         printk(KERN_INFO PFX "initialized. heartbeat=%d sec (nowayout=%d)\n",
716                 heartbeat, nowayout);
717
718         return 0;
719
720 err_out_misc_deregister:
721         if (pcipcwd_private.supports_temp)
722                 misc_deregister(&pcipcwd_temp_miscdev);
723 err_out_unregister_reboot:
724         unregister_reboot_notifier(&pcipcwd_notifier);
725 err_out_release_region:
726         pci_release_regions(pdev);
727 err_out_disable_device:
728         pci_disable_device(pdev);
729         return ret;
730 }
731
732 static void __devexit pcipcwd_card_exit(struct pci_dev *pdev)
733 {
734         /* Stop the timer before we leave */
735         if (!nowayout)
736                 pcipcwd_stop();
737
738         /* Deregister */
739         misc_deregister(&pcipcwd_miscdev);
740         if (pcipcwd_private.supports_temp)
741                 misc_deregister(&pcipcwd_temp_miscdev);
742         unregister_reboot_notifier(&pcipcwd_notifier);
743         pci_release_regions(pdev);
744         pci_disable_device(pdev);
745         cards_found--;
746 }
747
748 static struct pci_device_id pcipcwd_pci_tbl[] = {
749         { PCI_VENDOR_ID_QUICKLOGIC, PCI_DEVICE_ID_WATCHDOG_PCIPCWD,
750                 PCI_ANY_ID, PCI_ANY_ID, },
751         { 0 },                  /* End of list */
752 };
753 MODULE_DEVICE_TABLE(pci, pcipcwd_pci_tbl);
754
755 static struct pci_driver pcipcwd_driver = {
756         .name           = WATCHDOG_NAME,
757         .id_table       = pcipcwd_pci_tbl,
758         .probe          = pcipcwd_card_init,
759         .remove         = __devexit_p(pcipcwd_card_exit),
760 };
761
762 static int __init pcipcwd_init_module(void)
763 {
764         spin_lock_init(&pcipcwd_private.io_lock);
765
766         return pci_register_driver(&pcipcwd_driver);
767 }
768
769 static void __exit pcipcwd_cleanup_module(void)
770 {
771         pci_unregister_driver(&pcipcwd_driver);
772 }
773
774 module_init(pcipcwd_init_module);
775 module_exit(pcipcwd_cleanup_module);
776
777 MODULE_AUTHOR("Wim Van Sebroeck <wim@iguana.be>");
778 MODULE_DESCRIPTION("Berkshire PCI-PC Watchdog driver");
779 MODULE_LICENSE("GPL");
780 MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
781 MODULE_ALIAS_MISCDEV(TEMP_MINOR);