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 "1.01"
  54 #define WATCHDOG_DATE "02 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 #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
 108 static int nowayout = WATCHDOG_NOWAYOUT;
 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) {
 340                                 if (pcipcwd_stop())
 341                                         return -EIO;
 342                                 retval = 0;
 343                         }
 344
 345                         if (new_options & WDIOS_ENABLECARD) {
 346                                 if (pcipcwd_start())
 347                                         return -EIO;
 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);