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1// SPDX-License-Identifier: GPL-2.0+2/*3 * Berkshire PCI-PC Watchdog Card Driver4 *5 * (c) Copyright 2003-2007 Wim Van Sebroeck <wim@iguana.be>.6 *7 * Based on source code of the following authors:8 * Ken Hollis <kenji@bitgate.com>,9 * Lindsay Harris <lindsay@bluegum.com>,10 * Alan Cox <alan@lxorguk.ukuu.org.uk>,11 * Matt Domsch <Matt_Domsch@dell.com>,12 * Rob Radez <rob@osinvestor.com>13 *14 * Neither Wim Van Sebroeck nor Iguana vzw. admit liability nor15 * provide warranty for any of this software. This material is16 * provided "AS-IS" and at no charge.17 */18 19/*20 * A bells and whistles driver is available from:21 * http://www.kernel.org/pub/linux/kernel/people/wim/pcwd/pcwd_pci/22 *23 * More info available at24 * http://www.berkprod.com/ or http://www.pcwatchdog.com/25 */26 27/*28 * Includes, defines, variables, module parameters, ...29 */30 31#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt32 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 struct miscdevice */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#include <linux/uaccess.h> /* For copy_to_user/put_user/... */49#include <linux/io.h> /* For inb/outb/... */50 51/* Module and version information */52#define WATCHDOG_VERSION "1.03"53#define WATCHDOG_DRIVER_NAME "PCI-PC Watchdog"54#define WATCHDOG_NAME "pcwd_pci"55#define DRIVER_VERSION WATCHDOG_DRIVER_NAME " driver, v" WATCHDOG_VERSION56 57/* Stuff for the PCI ID's */58#ifndef PCI_VENDOR_ID_QUICKLOGIC59#define PCI_VENDOR_ID_QUICKLOGIC 0x11e360#endif61 62#ifndef PCI_DEVICE_ID_WATCHDOG_PCIPCWD63#define PCI_DEVICE_ID_WATCHDOG_PCIPCWD 0x503064#endif65 66/*67 * These are the defines that describe the control status bits for the68 * PCI-PC Watchdog card.69 */70/* Port 1 : Control Status #1 */71#define WD_PCI_WTRP 0x01 /* Watchdog Trip status */72#define WD_PCI_HRBT 0x02 /* Watchdog Heartbeat */73#define WD_PCI_TTRP 0x04 /* Temperature Trip status */74#define WD_PCI_RL2A 0x08 /* Relay 2 Active */75#define WD_PCI_RL1A 0x10 /* Relay 1 Active */76#define WD_PCI_R2DS 0x40 /* Relay 2 Disable Temperature-trip /77 reset */78#define WD_PCI_RLY2 0x80 /* Activate Relay 2 on the board */79/* Port 2 : Control Status #2 */80#define WD_PCI_WDIS 0x10 /* Watchdog Disable */81#define WD_PCI_ENTP 0x20 /* Enable Temperature Trip Reset */82#define WD_PCI_WRSP 0x40 /* Watchdog wrote response */83#define WD_PCI_PCMD 0x80 /* PC has sent command */84 85/* according to documentation max. time to process a command for the pci86 * watchdog card is 100 ms, so we give it 150 ms to do it's job */87#define PCI_COMMAND_TIMEOUT 15088 89/* Watchdog's internal commands */90#define CMD_GET_STATUS 0x0491#define CMD_GET_FIRMWARE_VERSION 0x0892#define CMD_READ_WATCHDOG_TIMEOUT 0x1893#define CMD_WRITE_WATCHDOG_TIMEOUT 0x1994#define CMD_GET_CLEAR_RESET_COUNT 0x8495 96/* Watchdog's Dip Switch heartbeat values */97static const int heartbeat_tbl[] = {98 5, /* OFF-OFF-OFF = 5 Sec */99 10, /* OFF-OFF-ON = 10 Sec */100 30, /* OFF-ON-OFF = 30 Sec */101 60, /* OFF-ON-ON = 1 Min */102 300, /* ON-OFF-OFF = 5 Min */103 600, /* ON-OFF-ON = 10 Min */104 1800, /* ON-ON-OFF = 30 Min */105 3600, /* ON-ON-ON = 1 hour */106};107 108/* We can only use 1 card due to the /dev/watchdog restriction */109static int cards_found;110 111/* internal variables */112static int temp_panic;113static unsigned long is_active;114static char expect_release;115/* this is private data for each PCI-PC watchdog card */116static struct {117 /* Wether or not the card has a temperature device */118 int supports_temp;119 /* The card's boot status */120 int boot_status;121 /* The cards I/O address */122 unsigned long io_addr;123 /* the lock for io operations */124 spinlock_t io_lock;125 /* the PCI-device */126 struct pci_dev *pdev;127} pcipcwd_private;128 129/* module parameters */130#define QUIET 0 /* Default */131#define VERBOSE 1 /* Verbose */132#define DEBUG 2 /* print fancy stuff too */133static int debug = QUIET;134module_param(debug, int, 0);135MODULE_PARM_DESC(debug, "Debug level: 0=Quiet, 1=Verbose, 2=Debug (default=0)");136 137#define WATCHDOG_HEARTBEAT 0 /* default heartbeat =138 delay-time from dip-switches */139static int heartbeat = WATCHDOG_HEARTBEAT;140module_param(heartbeat, int, 0);141MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds. "142 "(0<heartbeat<65536 or 0=delay-time from dip-switches, default="143 __MODULE_STRING(WATCHDOG_HEARTBEAT) ")");144 145static bool nowayout = WATCHDOG_NOWAYOUT;146module_param(nowayout, bool, 0);147MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default="148 __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");149 150/*151 * Internal functions152 */153 154static int send_command(int cmd, int *msb, int *lsb)155{156 int got_response, count;157 158 if (debug >= DEBUG)159 pr_debug("sending following data cmd=0x%02x msb=0x%02x lsb=0x%02x\n",160 cmd, *msb, *lsb);161 162 spin_lock(&pcipcwd_private.io_lock);163 /* If a command requires data it should be written first.164 * Data for commands with 8 bits of data should be written to port 4.165 * Commands with 16 bits of data, should be written as LSB to port 4166 * and MSB to port 5.167 * After the required data has been written then write the command to168 * port 6. */169 outb_p(*lsb, pcipcwd_private.io_addr + 4);170 outb_p(*msb, pcipcwd_private.io_addr + 5);171 outb_p(cmd, pcipcwd_private.io_addr + 6);172 173 /* wait till the pci card processed the command, signaled by174 * the WRSP bit in port 2 and give it a max. timeout of175 * PCI_COMMAND_TIMEOUT to process */176 got_response = inb_p(pcipcwd_private.io_addr + 2) & WD_PCI_WRSP;177 for (count = 0; (count < PCI_COMMAND_TIMEOUT) && (!got_response);178 count++) {179 mdelay(1);180 got_response = inb_p(pcipcwd_private.io_addr + 2) & WD_PCI_WRSP;181 }182 183 if (debug >= DEBUG) {184 if (got_response) {185 pr_debug("time to process command was: %d ms\n",186 count);187 } else {188 pr_debug("card did not respond on command!\n");189 }190 }191 192 if (got_response) {193 /* read back response */194 *lsb = inb_p(pcipcwd_private.io_addr + 4);195 *msb = inb_p(pcipcwd_private.io_addr + 5);196 197 /* clear WRSP bit */198 inb_p(pcipcwd_private.io_addr + 6);199 200 if (debug >= DEBUG)201 pr_debug("received following data for cmd=0x%02x: msb=0x%02x lsb=0x%02x\n",202 cmd, *msb, *lsb);203 }204 205 spin_unlock(&pcipcwd_private.io_lock);206 207 return got_response;208}209 210static inline void pcipcwd_check_temperature_support(void)211{212 if (inb_p(pcipcwd_private.io_addr) != 0xF0)213 pcipcwd_private.supports_temp = 1;214}215 216static int pcipcwd_get_option_switches(void)217{218 int option_switches;219 220 option_switches = inb_p(pcipcwd_private.io_addr + 3);221 return option_switches;222}223 224static void pcipcwd_show_card_info(void)225{226 int got_fw_rev, fw_rev_major, fw_rev_minor;227 char fw_ver_str[20]; /* The cards firmware version */228 int option_switches;229 230 got_fw_rev = send_command(CMD_GET_FIRMWARE_VERSION, &fw_rev_major,231 &fw_rev_minor);232 if (got_fw_rev)233 sprintf(fw_ver_str, "%u.%02u", fw_rev_major, fw_rev_minor);234 else235 sprintf(fw_ver_str, "<card no answer>");236 237 /* Get switch settings */238 option_switches = pcipcwd_get_option_switches();239 240 pr_info("Found card at port 0x%04x (Firmware: %s) %s temp option\n",241 (int) pcipcwd_private.io_addr, fw_ver_str,242 (pcipcwd_private.supports_temp ? "with" : "without"));243 244 pr_info("Option switches (0x%02x): Temperature Reset Enable=%s, Power On Delay=%s\n",245 option_switches,246 ((option_switches & 0x10) ? "ON" : "OFF"),247 ((option_switches & 0x08) ? "ON" : "OFF"));248 249 if (pcipcwd_private.boot_status & WDIOF_CARDRESET)250 pr_info("Previous reset was caused by the Watchdog card\n");251 252 if (pcipcwd_private.boot_status & WDIOF_OVERHEAT)253 pr_info("Card sensed a CPU Overheat\n");254 255 if (pcipcwd_private.boot_status == 0)256 pr_info("No previous trip detected - Cold boot or reset\n");257}258 259static int pcipcwd_start(void)260{261 int stat_reg;262 263 spin_lock(&pcipcwd_private.io_lock);264 outb_p(0x00, pcipcwd_private.io_addr + 3);265 udelay(1000);266 267 stat_reg = inb_p(pcipcwd_private.io_addr + 2);268 spin_unlock(&pcipcwd_private.io_lock);269 270 if (stat_reg & WD_PCI_WDIS) {271 pr_err("Card timer not enabled\n");272 return -1;273 }274 275 if (debug >= VERBOSE)276 pr_debug("Watchdog started\n");277 278 return 0;279}280 281static int pcipcwd_stop(void)282{283 int stat_reg;284 285 spin_lock(&pcipcwd_private.io_lock);286 outb_p(0xA5, pcipcwd_private.io_addr + 3);287 udelay(1000);288 289 outb_p(0xA5, pcipcwd_private.io_addr + 3);290 udelay(1000);291 292 stat_reg = inb_p(pcipcwd_private.io_addr + 2);293 spin_unlock(&pcipcwd_private.io_lock);294 295 if (!(stat_reg & WD_PCI_WDIS)) {296 pr_err("Card did not acknowledge disable attempt\n");297 return -1;298 }299 300 if (debug >= VERBOSE)301 pr_debug("Watchdog stopped\n");302 303 return 0;304}305 306static int pcipcwd_keepalive(void)307{308 /* Re-trigger watchdog by writing to port 0 */309 spin_lock(&pcipcwd_private.io_lock);310 outb_p(0x42, pcipcwd_private.io_addr); /* send out any data */311 spin_unlock(&pcipcwd_private.io_lock);312 313 if (debug >= DEBUG)314 pr_debug("Watchdog keepalive signal send\n");315 316 return 0;317}318 319static int pcipcwd_set_heartbeat(int t)320{321 int t_msb = t / 256;322 int t_lsb = t % 256;323 324 if ((t < 0x0001) || (t > 0xFFFF))325 return -EINVAL;326 327 /* Write new heartbeat to watchdog */328 send_command(CMD_WRITE_WATCHDOG_TIMEOUT, &t_msb, &t_lsb);329 330 heartbeat = t;331 if (debug >= VERBOSE)332 pr_debug("New heartbeat: %d\n", heartbeat);333 334 return 0;335}336 337static int pcipcwd_get_status(int *status)338{339 int control_status;340 341 *status = 0;342 control_status = inb_p(pcipcwd_private.io_addr + 1);343 if (control_status & WD_PCI_WTRP)344 *status |= WDIOF_CARDRESET;345 if (control_status & WD_PCI_TTRP) {346 *status |= WDIOF_OVERHEAT;347 if (temp_panic)348 panic(KBUILD_MODNAME ": Temperature overheat trip!\n");349 }350 351 if (debug >= DEBUG)352 pr_debug("Control Status #1: 0x%02x\n", control_status);353 354 return 0;355}356 357static int pcipcwd_clear_status(void)358{359 int control_status;360 int msb;361 int reset_counter;362 363 if (debug >= VERBOSE)364 pr_info("clearing watchdog trip status & LED\n");365 366 control_status = inb_p(pcipcwd_private.io_addr + 1);367 368 if (debug >= DEBUG) {369 pr_debug("status was: 0x%02x\n", control_status);370 pr_debug("sending: 0x%02x\n",371 (control_status & WD_PCI_R2DS) | WD_PCI_WTRP);372 }373 374 /* clear trip status & LED and keep mode of relay 2 */375 outb_p((control_status & WD_PCI_R2DS) | WD_PCI_WTRP,376 pcipcwd_private.io_addr + 1);377 378 /* clear reset counter */379 msb = 0;380 reset_counter = 0xff;381 send_command(CMD_GET_CLEAR_RESET_COUNT, &msb, &reset_counter);382 383 if (debug >= DEBUG) {384 pr_debug("reset count was: 0x%02x\n", reset_counter);385 }386 387 return 0;388}389 390static int pcipcwd_get_temperature(int *temperature)391{392 *temperature = 0;393 if (!pcipcwd_private.supports_temp)394 return -ENODEV;395 396 spin_lock(&pcipcwd_private.io_lock);397 *temperature = inb_p(pcipcwd_private.io_addr);398 spin_unlock(&pcipcwd_private.io_lock);399 400 /*401 * Convert celsius to fahrenheit, since this was402 * the decided 'standard' for this return value.403 */404 *temperature = (*temperature * 9 / 5) + 32;405 406 if (debug >= DEBUG) {407 pr_debug("temperature is: %d F\n", *temperature);408 }409 410 return 0;411}412 413static int pcipcwd_get_timeleft(int *time_left)414{415 int msb;416 int lsb;417 418 /* Read the time that's left before rebooting */419 /* Note: if the board is not yet armed then we will read 0xFFFF */420 send_command(CMD_READ_WATCHDOG_TIMEOUT, &msb, &lsb);421 422 *time_left = (msb << 8) + lsb;423 424 if (debug >= VERBOSE)425 pr_debug("Time left before next reboot: %d\n", *time_left);426 427 return 0;428}429 430/*431 * /dev/watchdog handling432 */433 434static ssize_t pcipcwd_write(struct file *file, const char __user *data,435 size_t len, loff_t *ppos)436{437 /* See if we got the magic character 'V' and reload the timer */438 if (len) {439 if (!nowayout) {440 size_t i;441 442 /* note: just in case someone wrote the magic character443 * five months ago... */444 expect_release = 0;445 446 /* scan to see whether or not we got the447 * magic character */448 for (i = 0; i != len; i++) {449 char c;450 if (get_user(c, data + i))451 return -EFAULT;452 if (c == 'V')453 expect_release = 42;454 }455 }456 457 /* someone wrote to us, we should reload the timer */458 pcipcwd_keepalive();459 }460 return len;461}462 463static long pcipcwd_ioctl(struct file *file, unsigned int cmd,464 unsigned long arg)465{466 void __user *argp = (void __user *)arg;467 int __user *p = argp;468 static const struct watchdog_info ident = {469 .options = WDIOF_OVERHEAT |470 WDIOF_CARDRESET |471 WDIOF_KEEPALIVEPING |472 WDIOF_SETTIMEOUT |473 WDIOF_MAGICCLOSE,474 .firmware_version = 1,475 .identity = WATCHDOG_DRIVER_NAME,476 };477 478 switch (cmd) {479 case WDIOC_GETSUPPORT:480 return copy_to_user(argp, &ident, sizeof(ident)) ? -EFAULT : 0;481 482 case WDIOC_GETSTATUS:483 {484 int status;485 pcipcwd_get_status(&status);486 return put_user(status, p);487 }488 489 case WDIOC_GETBOOTSTATUS:490 return put_user(pcipcwd_private.boot_status, p);491 492 case WDIOC_GETTEMP:493 {494 int temperature;495 496 if (pcipcwd_get_temperature(&temperature))497 return -EFAULT;498 499 return put_user(temperature, p);500 }501 502 case WDIOC_SETOPTIONS:503 {504 int new_options, retval = -EINVAL;505 506 if (get_user(new_options, p))507 return -EFAULT;508 509 if (new_options & WDIOS_DISABLECARD) {510 if (pcipcwd_stop())511 return -EIO;512 retval = 0;513 }514 515 if (new_options & WDIOS_ENABLECARD) {516 if (pcipcwd_start())517 return -EIO;518 retval = 0;519 }520 521 if (new_options & WDIOS_TEMPPANIC) {522 temp_panic = 1;523 retval = 0;524 }525 526 return retval;527 }528 529 case WDIOC_KEEPALIVE:530 pcipcwd_keepalive();531 return 0;532 533 case WDIOC_SETTIMEOUT:534 {535 int new_heartbeat;536 537 if (get_user(new_heartbeat, p))538 return -EFAULT;539 540 if (pcipcwd_set_heartbeat(new_heartbeat))541 return -EINVAL;542 543 pcipcwd_keepalive();544 }545 fallthrough;546 547 case WDIOC_GETTIMEOUT:548 return put_user(heartbeat, p);549 550 case WDIOC_GETTIMELEFT:551 {552 int time_left;553 554 if (pcipcwd_get_timeleft(&time_left))555 return -EFAULT;556 557 return put_user(time_left, p);558 }559 560 default:561 return -ENOTTY;562 }563}564 565static int pcipcwd_open(struct inode *inode, struct file *file)566{567 /* /dev/watchdog can only be opened once */568 if (test_and_set_bit(0, &is_active)) {569 if (debug >= VERBOSE)570 pr_err("Attempt to open already opened device\n");571 return -EBUSY;572 }573 574 /* Activate */575 pcipcwd_start();576 pcipcwd_keepalive();577 return stream_open(inode, file);578}579 580static int pcipcwd_release(struct inode *inode, struct file *file)581{582 /*583 * Shut off the timer.584 */585 if (expect_release == 42) {586 pcipcwd_stop();587 } else {588 pr_crit("Unexpected close, not stopping watchdog!\n");589 pcipcwd_keepalive();590 }591 expect_release = 0;592 clear_bit(0, &is_active);593 return 0;594}595 596/*597 * /dev/temperature handling598 */599 600static ssize_t pcipcwd_temp_read(struct file *file, char __user *data,601 size_t len, loff_t *ppos)602{603 int temperature;604 605 if (pcipcwd_get_temperature(&temperature))606 return -EFAULT;607 608 if (copy_to_user(data, &temperature, 1))609 return -EFAULT;610 611 return 1;612}613 614static int pcipcwd_temp_open(struct inode *inode, struct file *file)615{616 if (!pcipcwd_private.supports_temp)617 return -ENODEV;618 619 return stream_open(inode, file);620}621 622static int pcipcwd_temp_release(struct inode *inode, struct file *file)623{624 return 0;625}626 627/*628 * Notify system629 */630 631static int pcipcwd_notify_sys(struct notifier_block *this, unsigned long code,632 void *unused)633{634 if (code == SYS_DOWN || code == SYS_HALT)635 pcipcwd_stop(); /* Turn the WDT off */636 637 return NOTIFY_DONE;638}639 640/*641 * Kernel Interfaces642 */643 644static const struct file_operations pcipcwd_fops = {645 .owner = THIS_MODULE,646 .write = pcipcwd_write,647 .unlocked_ioctl = pcipcwd_ioctl,648 .compat_ioctl = compat_ptr_ioctl,649 .open = pcipcwd_open,650 .release = pcipcwd_release,651};652 653static struct miscdevice pcipcwd_miscdev = {654 .minor = WATCHDOG_MINOR,655 .name = "watchdog",656 .fops = &pcipcwd_fops,657};658 659static const struct file_operations pcipcwd_temp_fops = {660 .owner = THIS_MODULE,661 .read = pcipcwd_temp_read,662 .open = pcipcwd_temp_open,663 .release = pcipcwd_temp_release,664};665 666static struct miscdevice pcipcwd_temp_miscdev = {667 .minor = TEMP_MINOR,668 .name = "temperature",669 .fops = &pcipcwd_temp_fops,670};671 672static struct notifier_block pcipcwd_notifier = {673 .notifier_call = pcipcwd_notify_sys,674};675 676/*677 * Init & exit routines678 */679 680static int pcipcwd_card_init(struct pci_dev *pdev,681 const struct pci_device_id *ent)682{683 int ret = -EIO;684 685 cards_found++;686 if (cards_found == 1)687 pr_info("%s\n", DRIVER_VERSION);688 689 if (cards_found > 1) {690 pr_err("This driver only supports 1 device\n");691 return -ENODEV;692 }693 694 if (pci_enable_device(pdev)) {695 pr_err("Not possible to enable PCI Device\n");696 return -ENODEV;697 }698 699 if (pci_resource_start(pdev, 0) == 0x0000) {700 pr_err("No I/O-Address for card detected\n");701 ret = -ENODEV;702 goto err_out_disable_device;703 }704 705 spin_lock_init(&pcipcwd_private.io_lock);706 pcipcwd_private.pdev = pdev;707 pcipcwd_private.io_addr = pci_resource_start(pdev, 0);708 709 if (pci_request_regions(pdev, WATCHDOG_NAME)) {710 pr_err("I/O address 0x%04x already in use\n",711 (int) pcipcwd_private.io_addr);712 ret = -EIO;713 goto err_out_disable_device;714 }715 716 /* get the boot_status */717 pcipcwd_get_status(&pcipcwd_private.boot_status);718 719 /* clear the "card caused reboot" flag */720 pcipcwd_clear_status();721 722 /* disable card */723 pcipcwd_stop();724 725 /* Check whether or not the card supports the temperature device */726 pcipcwd_check_temperature_support();727 728 /* Show info about the card itself */729 pcipcwd_show_card_info();730 731 /* If heartbeat = 0 then we use the heartbeat from the dip-switches */732 if (heartbeat == 0)733 heartbeat =734 heartbeat_tbl[(pcipcwd_get_option_switches() & 0x07)];735 736 /* Check that the heartbeat value is within it's range ;737 * if not reset to the default */738 if (pcipcwd_set_heartbeat(heartbeat)) {739 pcipcwd_set_heartbeat(WATCHDOG_HEARTBEAT);740 pr_info("heartbeat value must be 0<heartbeat<65536, using %d\n",741 WATCHDOG_HEARTBEAT);742 }743 744 ret = register_reboot_notifier(&pcipcwd_notifier);745 if (ret != 0) {746 pr_err("cannot register reboot notifier (err=%d)\n", ret);747 goto err_out_release_region;748 }749 750 if (pcipcwd_private.supports_temp) {751 ret = misc_register(&pcipcwd_temp_miscdev);752 if (ret != 0) {753 pr_err("cannot register miscdev on minor=%d (err=%d)\n",754 TEMP_MINOR, ret);755 goto err_out_unregister_reboot;756 }757 }758 759 ret = misc_register(&pcipcwd_miscdev);760 if (ret != 0) {761 pr_err("cannot register miscdev on minor=%d (err=%d)\n",762 WATCHDOG_MINOR, ret);763 goto err_out_misc_deregister;764 }765 766 pr_info("initialized. heartbeat=%d sec (nowayout=%d)\n",767 heartbeat, nowayout);768 769 return 0;770 771err_out_misc_deregister:772 if (pcipcwd_private.supports_temp)773 misc_deregister(&pcipcwd_temp_miscdev);774err_out_unregister_reboot:775 unregister_reboot_notifier(&pcipcwd_notifier);776err_out_release_region:777 pci_release_regions(pdev);778err_out_disable_device:779 pci_disable_device(pdev);780 return ret;781}782 783static void pcipcwd_card_exit(struct pci_dev *pdev)784{785 /* Stop the timer before we leave */786 if (!nowayout)787 pcipcwd_stop();788 789 /* Deregister */790 misc_deregister(&pcipcwd_miscdev);791 if (pcipcwd_private.supports_temp)792 misc_deregister(&pcipcwd_temp_miscdev);793 unregister_reboot_notifier(&pcipcwd_notifier);794 pci_release_regions(pdev);795 pci_disable_device(pdev);796 cards_found--;797}798 799static const struct pci_device_id pcipcwd_pci_tbl[] = {800 { PCI_VENDOR_ID_QUICKLOGIC, PCI_DEVICE_ID_WATCHDOG_PCIPCWD,801 PCI_ANY_ID, PCI_ANY_ID, },802 { 0 }, /* End of list */803};804MODULE_DEVICE_TABLE(pci, pcipcwd_pci_tbl);805 806static struct pci_driver pcipcwd_driver = {807 .name = WATCHDOG_NAME,808 .id_table = pcipcwd_pci_tbl,809 .probe = pcipcwd_card_init,810 .remove = pcipcwd_card_exit,811};812 813module_pci_driver(pcipcwd_driver);814 815MODULE_AUTHOR("Wim Van Sebroeck <wim@iguana.be>");816MODULE_DESCRIPTION("Berkshire PCI-PC Watchdog driver");817MODULE_LICENSE("GPL");818