[AGPGART] uninorth: Add module param 'aperture' for aperture size
[sfrench/cifs-2.6.git] / drivers / char / watchdog / pcwd_pci.c
1 /*
2  *      Berkshire PCI-PC Watchdog Card Driver
3  *
4  *      (c) Copyright 2003-2005 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:
25  *      http://www.kernel.org/pub/linux/kernel/people/wim/pcwd/pcwd_pci/
26  *
27  *      More info available at http://www.berkprod.com/ or http://www.pcwatchdog.com/
28  */
29
30 /*
31  *      Includes, defines, variables, module parameters, ...
32  */
33
34 #include <linux/config.h>       /* For CONFIG_WATCHDOG_NOWAYOUT/... */
35 #include <linux/module.h>       /* For module specific items */
36 #include <linux/moduleparam.h>  /* For new moduleparam's */
37 #include <linux/types.h>        /* For standard types (like size_t) */
38 #include <linux/errno.h>        /* For the -ENODEV/... values */
39 #include <linux/kernel.h>       /* For printk/panic/... */
40 #include <linux/delay.h>        /* For mdelay function */
41 #include <linux/miscdevice.h>   /* For MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR) */
42 #include <linux/watchdog.h>     /* For the watchdog specific items */
43 #include <linux/notifier.h>     /* For notifier support */
44 #include <linux/reboot.h>       /* For reboot_notifier stuff */
45 #include <linux/init.h>         /* For __init/__exit/... */
46 #include <linux/fs.h>           /* For file operations */
47 #include <linux/pci.h>          /* For pci functions */
48 #include <linux/ioport.h>       /* For io-port access */
49 #include <linux/spinlock.h>     /* For spin_lock/spin_unlock/... */
50
51 #include <asm/uaccess.h>        /* For copy_to_user/put_user/... */
52 #include <asm/io.h>             /* For inb/outb/... */
53
54 /* Module and version information */
55 #define WATCHDOG_VERSION "1.02"
56 #define WATCHDOG_DATE "03 Sep 2005"
57 #define WATCHDOG_DRIVER_NAME "PCI-PC Watchdog"
58 #define WATCHDOG_NAME "pcwd_pci"
59 #define PFX WATCHDOG_NAME ": "
60 #define DRIVER_VERSION WATCHDOG_DRIVER_NAME " driver, v" WATCHDOG_VERSION " (" WATCHDOG_DATE ")\n"
61
62 /* Stuff for the PCI ID's  */
63 #ifndef PCI_VENDOR_ID_QUICKLOGIC
64 #define PCI_VENDOR_ID_QUICKLOGIC    0x11e3
65 #endif
66
67 #ifndef PCI_DEVICE_ID_WATCHDOG_PCIPCWD
68 #define PCI_DEVICE_ID_WATCHDOG_PCIPCWD 0x5030
69 #endif
70
71 /*
72  * These are the defines that describe the control status bits for the
73  * PCI-PC Watchdog card.
74  */
75 /* Port 1 : Control Status #1 */
76 #define WD_PCI_WTRP             0x01    /* Watchdog Trip status */
77 #define WD_PCI_HRBT             0x02    /* Watchdog Heartbeat */
78 #define WD_PCI_TTRP             0x04    /* Temperature Trip status */
79 #define WD_PCI_RL2A             0x08    /* Relay 2 Active */
80 #define WD_PCI_RL1A             0x10    /* Relay 1 Active */
81 #define WD_PCI_R2DS             0x40    /* Relay 2 Disable Temperature-trip/reset */
82 #define WD_PCI_RLY2             0x80    /* Activate Relay 2 on the board */
83 /* Port 2 : Control Status #2 */
84 #define WD_PCI_WDIS             0x10    /* Watchdog Disable */
85 #define WD_PCI_ENTP             0x20    /* Enable Temperature Trip Reset */
86 #define WD_PCI_WRSP             0x40    /* Watchdog wrote response */
87 #define WD_PCI_PCMD             0x80    /* PC has sent command */
88
89 /* according to documentation max. time to process a command for the pci
90  * watchdog card is 100 ms, so we give it 150 ms to do it's job */
91 #define PCI_COMMAND_TIMEOUT     150
92
93 /* Watchdog's internal commands */
94 #define CMD_GET_STATUS                          0x04
95 #define CMD_GET_FIRMWARE_VERSION                0x08
96 #define CMD_READ_WATCHDOG_TIMEOUT               0x18
97 #define CMD_WRITE_WATCHDOG_TIMEOUT              0x19
98 #define CMD_GET_CLEAR_RESET_COUNT               0x84
99
100 /* We can only use 1 card due to the /dev/watchdog restriction */
101 static int cards_found;
102
103 /* internal variables */
104 static int temp_panic;
105 static unsigned long is_active;
106 static char expect_release;
107 static struct {                         /* this is private data for each PCI-PC watchdog card */
108         int supports_temp;              /* Wether or not the card has a temperature device */
109         int boot_status;                /* The card's boot status */
110         unsigned long io_addr;          /* The cards I/O address */
111         spinlock_t io_lock;             /* the lock for io operations */
112         struct pci_dev *pdev;           /* the PCI-device */
113 } pcipcwd_private;
114
115 /* module parameters */
116 #define QUIET   0       /* Default */
117 #define VERBOSE 1       /* Verbose */
118 #define DEBUG   2       /* print fancy stuff too */
119 static int debug = QUIET;
120 module_param(debug, int, 0);
121 MODULE_PARM_DESC(debug, "Debug level: 0=Quiet, 1=Verbose, 2=Debug (default=0)");
122
123 #define WATCHDOG_HEARTBEAT 2    /* 2 sec default heartbeat */
124 static int heartbeat = WATCHDOG_HEARTBEAT;
125 module_param(heartbeat, int, 0);
126 MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds. (0<heartbeat<65536, default=" __MODULE_STRING(WATCHDOG_HEARTBEAT) ")");
127
128 static int nowayout = WATCHDOG_NOWAYOUT;
129 module_param(nowayout, int, 0);
130 MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)");
131
132 /*
133  *      Internal functions
134  */
135
136 static int send_command(int cmd, int *msb, int *lsb)
137 {
138         int got_response, count;
139
140         if (debug >= DEBUG)
141                 printk(KERN_DEBUG PFX "sending following data cmd=0x%02x msb=0x%02x lsb=0x%02x\n",
142                 cmd, *msb, *lsb);
143
144         spin_lock(&pcipcwd_private.io_lock);
145         /* If a command requires data it should be written first.
146          * Data for commands with 8 bits of data should be written to port 4.
147          * Commands with 16 bits of data, should be written as LSB to port 4
148          * and MSB to port 5.
149          * After the required data has been written then write the command to
150          * port 6. */
151         outb_p(*lsb, pcipcwd_private.io_addr + 4);
152         outb_p(*msb, pcipcwd_private.io_addr + 5);
153         outb_p(cmd, pcipcwd_private.io_addr + 6);
154
155         /* wait till the pci card processed the command, signaled by
156          * the WRSP bit in port 2 and give it a max. timeout of
157          * PCI_COMMAND_TIMEOUT to process */
158         got_response = inb_p(pcipcwd_private.io_addr + 2) & WD_PCI_WRSP;
159         for (count = 0; (count < PCI_COMMAND_TIMEOUT) && (!got_response); count++) {
160                 mdelay(1);
161                 got_response = inb_p(pcipcwd_private.io_addr + 2) & WD_PCI_WRSP;
162         }
163
164         if (debug >= DEBUG) {
165                 if (got_response) {
166                         printk(KERN_DEBUG PFX "time to process command was: %d ms\n",
167                                 count);
168                 } else {
169                         printk(KERN_DEBUG PFX "card did not respond on command!\n");
170                 }
171         }
172
173         if (got_response) {
174                 /* read back response */
175                 *lsb = inb_p(pcipcwd_private.io_addr + 4);
176                 *msb = inb_p(pcipcwd_private.io_addr + 5);
177
178                 /* clear WRSP bit */
179                 inb_p(pcipcwd_private.io_addr + 6);
180
181                 if (debug >= DEBUG)
182                         printk(KERN_DEBUG PFX "received following data for cmd=0x%02x: msb=0x%02x lsb=0x%02x\n",
183                                 cmd, *msb, *lsb);
184         }
185
186         spin_unlock(&pcipcwd_private.io_lock);
187
188         return got_response;
189 }
190
191 static inline void pcipcwd_check_temperature_support(void)
192 {
193         if (inb_p(pcipcwd_private.io_addr) != 0xF0)
194                 pcipcwd_private.supports_temp = 1;
195 }
196
197 static int pcipcwd_get_option_switches(void)
198 {
199         int option_switches;
200
201         option_switches = inb_p(pcipcwd_private.io_addr + 3);
202         return option_switches;
203 }
204
205 static void pcipcwd_show_card_info(void)
206 {
207         int got_fw_rev, fw_rev_major, fw_rev_minor;
208         char fw_ver_str[20];            /* The cards firmware version */
209         int option_switches;
210
211         got_fw_rev = send_command(CMD_GET_FIRMWARE_VERSION, &fw_rev_major, &fw_rev_minor);
212         if (got_fw_rev) {
213                 sprintf(fw_ver_str, "%u.%02u", fw_rev_major, fw_rev_minor);
214         } else {
215                 sprintf(fw_ver_str, "<card no answer>");
216         }
217
218         /* Get switch settings */
219         option_switches = pcipcwd_get_option_switches();
220
221         printk(KERN_INFO PFX "Found card at port 0x%04x (Firmware: %s) %s temp option\n",
222                 (int) pcipcwd_private.io_addr, fw_ver_str,
223                 (pcipcwd_private.supports_temp ? "with" : "without"));
224
225         printk(KERN_INFO PFX "Option switches (0x%02x): Temperature Reset Enable=%s, Power On Delay=%s\n",
226                 option_switches,
227                 ((option_switches & 0x10) ? "ON" : "OFF"),
228                 ((option_switches & 0x08) ? "ON" : "OFF"));
229
230         if (pcipcwd_private.boot_status & WDIOF_CARDRESET)
231                 printk(KERN_INFO PFX "Previous reset was caused by the Watchdog card\n");
232
233         if (pcipcwd_private.boot_status & WDIOF_OVERHEAT)
234                 printk(KERN_INFO PFX "Card sensed a CPU Overheat\n");
235
236         if (pcipcwd_private.boot_status == 0)
237                 printk(KERN_INFO PFX "No previous trip detected - Cold boot or reset\n");
238 }
239
240 static int pcipcwd_start(void)
241 {
242         int stat_reg;
243
244         spin_lock(&pcipcwd_private.io_lock);
245         outb_p(0x00, pcipcwd_private.io_addr + 3);
246         udelay(1000);
247
248         stat_reg = inb_p(pcipcwd_private.io_addr + 2);
249         spin_unlock(&pcipcwd_private.io_lock);
250
251         if (stat_reg & WD_PCI_WDIS) {
252                 printk(KERN_ERR PFX "Card timer not enabled\n");
253                 return -1;
254         }
255
256         if (debug >= VERBOSE)
257                 printk(KERN_DEBUG PFX "Watchdog started\n");
258
259         return 0;
260 }
261
262 static int pcipcwd_stop(void)
263 {
264         int stat_reg;
265
266         spin_lock(&pcipcwd_private.io_lock);
267         outb_p(0xA5, pcipcwd_private.io_addr + 3);
268         udelay(1000);
269
270         outb_p(0xA5, pcipcwd_private.io_addr + 3);
271         udelay(1000);
272
273         stat_reg = inb_p(pcipcwd_private.io_addr + 2);
274         spin_unlock(&pcipcwd_private.io_lock);
275
276         if (!(stat_reg & WD_PCI_WDIS)) {
277                 printk(KERN_ERR PFX "Card did not acknowledge disable attempt\n");
278                 return -1;
279         }
280
281         if (debug >= VERBOSE)
282                 printk(KERN_DEBUG PFX "Watchdog stopped\n");
283
284         return 0;
285 }
286
287 static int pcipcwd_keepalive(void)
288 {
289         /* Re-trigger watchdog by writing to port 0 */
290         outb_p(0x42, pcipcwd_private.io_addr);  /* send out any data */
291
292         if (debug >= DEBUG)
293                 printk(KERN_DEBUG PFX "Watchdog keepalive signal send\n");
294
295         return 0;
296 }
297
298 static int pcipcwd_set_heartbeat(int t)
299 {
300         int t_msb = t / 256;
301         int t_lsb = t % 256;
302
303         if ((t < 0x0001) || (t > 0xFFFF))
304                 return -EINVAL;
305
306         /* Write new heartbeat to watchdog */
307         send_command(CMD_WRITE_WATCHDOG_TIMEOUT, &t_msb, &t_lsb);
308
309         heartbeat = t;
310         if (debug >= VERBOSE)
311                 printk(KERN_DEBUG PFX "New heartbeat: %d\n",
312                        heartbeat);
313
314         return 0;
315 }
316
317 static int pcipcwd_get_status(int *status)
318 {
319         int control_status;
320
321         *status=0;
322         control_status = inb_p(pcipcwd_private.io_addr + 1);
323         if (control_status & WD_PCI_WTRP)
324                 *status |= WDIOF_CARDRESET;
325         if (control_status & WD_PCI_TTRP) {
326                 *status |= WDIOF_OVERHEAT;
327                 if (temp_panic)
328                         panic(PFX "Temperature overheat trip!\n");
329         }
330
331         if (debug >= DEBUG)
332                 printk(KERN_DEBUG PFX "Control Status #1: 0x%02x\n",
333                        control_status);
334
335         return 0;
336 }
337
338 static int pcipcwd_clear_status(void)
339 {
340         int control_status;
341         int msb;
342         int reset_counter;
343
344         if (debug >= VERBOSE)
345                 printk(KERN_INFO PFX "clearing watchdog trip status & LED\n");
346
347         control_status = inb_p(pcipcwd_private.io_addr + 1);
348
349         if (debug >= DEBUG) {
350                 printk(KERN_DEBUG PFX "status was: 0x%02x\n", control_status);
351                 printk(KERN_DEBUG PFX "sending: 0x%02x\n",
352                        (control_status & WD_PCI_R2DS) | WD_PCI_WTRP);
353         }
354
355         /* clear trip status & LED and keep mode of relay 2 */
356         outb_p((control_status & WD_PCI_R2DS) | WD_PCI_WTRP, pcipcwd_private.io_addr + 1);
357
358         /* clear reset counter */
359         msb=0;
360         reset_counter=0xff;
361         send_command(CMD_GET_CLEAR_RESET_COUNT, &msb, &reset_counter);
362
363         if (debug >= DEBUG) {
364                 printk(KERN_DEBUG PFX "reset count was: 0x%02x\n",
365                        reset_counter);
366         }
367
368         return 0;
369 }
370
371 static int pcipcwd_get_temperature(int *temperature)
372 {
373         *temperature = 0;
374         if (!pcipcwd_private.supports_temp)
375                 return -ENODEV;
376
377         *temperature = inb_p(pcipcwd_private.io_addr);
378
379         /*
380          * Convert celsius to fahrenheit, since this was
381          * the decided 'standard' for this return value.
382          */
383         *temperature = (*temperature * 9 / 5) + 32;
384
385         if (debug >= DEBUG) {
386                 printk(KERN_DEBUG PFX "temperature is: %d F\n",
387                        *temperature);
388         }
389
390         return 0;
391 }
392
393 static int pcipcwd_get_timeleft(int *time_left)
394 {
395         int msb;
396         int lsb;
397
398         /* Read the time that's left before rebooting */
399         /* Note: if the board is not yet armed then we will read 0xFFFF */
400         send_command(CMD_READ_WATCHDOG_TIMEOUT, &msb, &lsb);
401
402         *time_left = (msb << 8) + lsb;
403
404         if (debug >= VERBOSE)
405                 printk(KERN_DEBUG PFX "Time left before next reboot: %d\n",
406                        *time_left);
407
408         return 0;
409 }
410
411 /*
412  *      /dev/watchdog handling
413  */
414
415 static ssize_t pcipcwd_write(struct file *file, const char __user *data,
416                              size_t len, loff_t *ppos)
417 {
418         /* See if we got the magic character 'V' and reload the timer */
419         if (len) {
420                 if (!nowayout) {
421                         size_t i;
422
423                         /* note: just in case someone wrote the magic character
424                          * five months ago... */
425                         expect_release = 0;
426
427                         /* scan to see whether or not we got the magic character */
428                         for (i = 0; i != len; i++) {
429                                 char c;
430                                 if(get_user(c, data+i))
431                                         return -EFAULT;
432                                 if (c == 'V')
433                                         expect_release = 42;
434                         }
435                 }
436
437                 /* someone wrote to us, we should reload the timer */
438                 pcipcwd_keepalive();
439         }
440         return len;
441 }
442
443 static int pcipcwd_ioctl(struct inode *inode, struct file *file,
444                           unsigned int cmd, unsigned long arg)
445 {
446         void __user *argp = (void __user *)arg;
447         int __user *p = argp;
448         static struct watchdog_info ident = {
449                 .options =              WDIOF_OVERHEAT |
450                                         WDIOF_CARDRESET |
451                                         WDIOF_KEEPALIVEPING |
452                                         WDIOF_SETTIMEOUT |
453                                         WDIOF_MAGICCLOSE,
454                 .firmware_version =     1,
455                 .identity =             WATCHDOG_DRIVER_NAME,
456         };
457
458         switch (cmd) {
459                 case WDIOC_GETSUPPORT:
460                         return copy_to_user(argp, &ident,
461                                 sizeof (ident)) ? -EFAULT : 0;
462
463                 case WDIOC_GETSTATUS:
464                 {
465                         int status;
466
467                         pcipcwd_get_status(&status);
468
469                         return put_user(status, p);
470                 }
471
472                 case WDIOC_GETBOOTSTATUS:
473                         return put_user(pcipcwd_private.boot_status, p);
474
475                 case WDIOC_GETTEMP:
476                 {
477                         int temperature;
478
479                         if (pcipcwd_get_temperature(&temperature))
480                                 return -EFAULT;
481
482                         return put_user(temperature, p);
483                 }
484
485                 case WDIOC_KEEPALIVE:
486                         pcipcwd_keepalive();
487                         return 0;
488
489                 case WDIOC_SETOPTIONS:
490                 {
491                         int new_options, retval = -EINVAL;
492
493                         if (get_user (new_options, p))
494                                 return -EFAULT;
495
496                         if (new_options & WDIOS_DISABLECARD) {
497                                 if (pcipcwd_stop())
498                                         return -EIO;
499                                 retval = 0;
500                         }
501
502                         if (new_options & WDIOS_ENABLECARD) {
503                                 if (pcipcwd_start())
504                                         return -EIO;
505                                 retval = 0;
506                         }
507
508                         if (new_options & WDIOS_TEMPPANIC) {
509                                 temp_panic = 1;
510                                 retval = 0;
511                         }
512
513                         return retval;
514                 }
515
516                 case WDIOC_SETTIMEOUT:
517                 {
518                         int new_heartbeat;
519
520                         if (get_user(new_heartbeat, p))
521                                 return -EFAULT;
522
523                         if (pcipcwd_set_heartbeat(new_heartbeat))
524                             return -EINVAL;
525
526                         pcipcwd_keepalive();
527                         /* Fall */
528                 }
529
530                 case WDIOC_GETTIMEOUT:
531                         return put_user(heartbeat, p);
532
533                 case WDIOC_GETTIMELEFT:
534                 {
535                         int time_left;
536
537                         if (pcipcwd_get_timeleft(&time_left))
538                                 return -EFAULT;
539
540                         return put_user(time_left, p);
541                 }
542
543                 default:
544                         return -ENOIOCTLCMD;
545         }
546 }
547
548 static int pcipcwd_open(struct inode *inode, struct file *file)
549 {
550         /* /dev/watchdog can only be opened once */
551         if (test_and_set_bit(0, &is_active)) {
552                 if (debug >= VERBOSE)
553                         printk(KERN_ERR PFX "Attempt to open already opened device.\n");
554                 return -EBUSY;
555         }
556
557         /* Activate */
558         pcipcwd_start();
559         pcipcwd_keepalive();
560         return nonseekable_open(inode, file);
561 }
562
563 static int pcipcwd_release(struct inode *inode, struct file *file)
564 {
565         /*
566          *      Shut off the timer.
567          */
568         if (expect_release == 42) {
569                 pcipcwd_stop();
570         } else {
571                 printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n");
572                 pcipcwd_keepalive();
573         }
574         expect_release = 0;
575         clear_bit(0, &is_active);
576         return 0;
577 }
578
579 /*
580  *      /dev/temperature handling
581  */
582
583 static ssize_t pcipcwd_temp_read(struct file *file, char __user *data,
584                                 size_t len, loff_t *ppos)
585 {
586         int temperature;
587
588         if (pcipcwd_get_temperature(&temperature))
589                 return -EFAULT;
590
591         if (copy_to_user (data, &temperature, 1))
592                 return -EFAULT;
593
594         return 1;
595 }
596
597 static int pcipcwd_temp_open(struct inode *inode, struct file *file)
598 {
599         if (!pcipcwd_private.supports_temp)
600                 return -ENODEV;
601
602         return nonseekable_open(inode, file);
603 }
604
605 static int pcipcwd_temp_release(struct inode *inode, struct file *file)
606 {
607         return 0;
608 }
609
610 /*
611  *      Notify system
612  */
613
614 static int pcipcwd_notify_sys(struct notifier_block *this, unsigned long code, void *unused)
615 {
616         if (code==SYS_DOWN || code==SYS_HALT) {
617                 /* Turn the WDT off */
618                 pcipcwd_stop();
619         }
620
621         return NOTIFY_DONE;
622 }
623
624 /*
625  *      Kernel Interfaces
626  */
627
628 static const struct file_operations pcipcwd_fops = {
629         .owner =        THIS_MODULE,
630         .llseek =       no_llseek,
631         .write =        pcipcwd_write,
632         .ioctl =        pcipcwd_ioctl,
633         .open =         pcipcwd_open,
634         .release =      pcipcwd_release,
635 };
636
637 static struct miscdevice pcipcwd_miscdev = {
638         .minor =        WATCHDOG_MINOR,
639         .name =         "watchdog",
640         .fops =         &pcipcwd_fops,
641 };
642
643 static const struct file_operations pcipcwd_temp_fops = {
644         .owner =        THIS_MODULE,
645         .llseek =       no_llseek,
646         .read =         pcipcwd_temp_read,
647         .open =         pcipcwd_temp_open,
648         .release =      pcipcwd_temp_release,
649 };
650
651 static struct miscdevice pcipcwd_temp_miscdev = {
652         .minor =        TEMP_MINOR,
653         .name =         "temperature",
654         .fops =         &pcipcwd_temp_fops,
655 };
656
657 static struct notifier_block pcipcwd_notifier = {
658         .notifier_call =        pcipcwd_notify_sys,
659 };
660
661 /*
662  *      Init & exit routines
663  */
664
665 static int __devinit pcipcwd_card_init(struct pci_dev *pdev,
666                 const struct pci_device_id *ent)
667 {
668         int ret = -EIO;
669
670         cards_found++;
671         if (cards_found == 1)
672                 printk(KERN_INFO PFX DRIVER_VERSION);
673
674         if (cards_found > 1) {
675                 printk(KERN_ERR PFX "This driver only supports 1 device\n");
676                 return -ENODEV;
677         }
678
679         if (pci_enable_device(pdev)) {
680                 printk(KERN_ERR PFX "Not possible to enable PCI Device\n");
681                 return -ENODEV;
682         }
683
684         if (pci_resource_start(pdev, 0) == 0x0000) {
685                 printk(KERN_ERR PFX "No I/O-Address for card detected\n");
686                 ret = -ENODEV;
687                 goto err_out_disable_device;
688         }
689
690         pcipcwd_private.pdev = pdev;
691         pcipcwd_private.io_addr = pci_resource_start(pdev, 0);
692
693         if (pci_request_regions(pdev, WATCHDOG_NAME)) {
694                 printk(KERN_ERR PFX "I/O address 0x%04x already in use\n",
695                         (int) pcipcwd_private.io_addr);
696                 ret = -EIO;
697                 goto err_out_disable_device;
698         }
699
700         /* get the boot_status */
701         pcipcwd_get_status(&pcipcwd_private.boot_status);
702
703         /* clear the "card caused reboot" flag */
704         pcipcwd_clear_status();
705
706         /* disable card */
707         pcipcwd_stop();
708
709         /* Check whether or not the card supports the temperature device */
710         pcipcwd_check_temperature_support();
711
712         /* Show info about the card itself */
713         pcipcwd_show_card_info();
714
715         /* Check that the heartbeat value is within it's range ; if not reset to the default */
716         if (pcipcwd_set_heartbeat(heartbeat)) {
717                 pcipcwd_set_heartbeat(WATCHDOG_HEARTBEAT);
718                 printk(KERN_INFO PFX "heartbeat value must be 0<heartbeat<65536, using %d\n",
719                         WATCHDOG_HEARTBEAT);
720         }
721
722         ret = register_reboot_notifier(&pcipcwd_notifier);
723         if (ret != 0) {
724                 printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
725                         ret);
726                 goto err_out_release_region;
727         }
728
729         if (pcipcwd_private.supports_temp) {
730                 ret = misc_register(&pcipcwd_temp_miscdev);
731                 if (ret != 0) {
732                         printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
733                                 TEMP_MINOR, ret);
734                         goto err_out_unregister_reboot;
735                 }
736         }
737
738         ret = misc_register(&pcipcwd_miscdev);
739         if (ret != 0) {
740                 printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
741                         WATCHDOG_MINOR, ret);
742                 goto err_out_misc_deregister;
743         }
744
745         printk(KERN_INFO PFX "initialized. heartbeat=%d sec (nowayout=%d)\n",
746                 heartbeat, nowayout);
747
748         return 0;
749
750 err_out_misc_deregister:
751         if (pcipcwd_private.supports_temp)
752                 misc_deregister(&pcipcwd_temp_miscdev);
753 err_out_unregister_reboot:
754         unregister_reboot_notifier(&pcipcwd_notifier);
755 err_out_release_region:
756         pci_release_regions(pdev);
757 err_out_disable_device:
758         pci_disable_device(pdev);
759         return ret;
760 }
761
762 static void __devexit pcipcwd_card_exit(struct pci_dev *pdev)
763 {
764         /* Stop the timer before we leave */
765         if (!nowayout)
766                 pcipcwd_stop();
767
768         /* Deregister */
769         misc_deregister(&pcipcwd_miscdev);
770         if (pcipcwd_private.supports_temp)
771                 misc_deregister(&pcipcwd_temp_miscdev);
772         unregister_reboot_notifier(&pcipcwd_notifier);
773         pci_release_regions(pdev);
774         pci_disable_device(pdev);
775         cards_found--;
776 }
777
778 static struct pci_device_id pcipcwd_pci_tbl[] = {
779         { PCI_VENDOR_ID_QUICKLOGIC, PCI_DEVICE_ID_WATCHDOG_PCIPCWD,
780                 PCI_ANY_ID, PCI_ANY_ID, },
781         { 0 },                  /* End of list */
782 };
783 MODULE_DEVICE_TABLE(pci, pcipcwd_pci_tbl);
784
785 static struct pci_driver pcipcwd_driver = {
786         .name           = WATCHDOG_NAME,
787         .id_table       = pcipcwd_pci_tbl,
788         .probe          = pcipcwd_card_init,
789         .remove         = __devexit_p(pcipcwd_card_exit),
790 };
791
792 static int __init pcipcwd_init_module(void)
793 {
794         spin_lock_init(&pcipcwd_private.io_lock);
795
796         return pci_register_driver(&pcipcwd_driver);
797 }
798
799 static void __exit pcipcwd_cleanup_module(void)
800 {
801         pci_unregister_driver(&pcipcwd_driver);
802 }
803
804 module_init(pcipcwd_init_module);
805 module_exit(pcipcwd_cleanup_module);
806
807 MODULE_AUTHOR("Wim Van Sebroeck <wim@iguana.be>");
808 MODULE_DESCRIPTION("Berkshire PCI-PC Watchdog driver");
809 MODULE_LICENSE("GPL");
810 MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
811 MODULE_ALIAS_MISCDEV(TEMP_MINOR);