1/* 2 * Berkshire PCI-PC Watchdog Card Driver 3 * 4 * (c) Copyright 2003-2007 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/module.h> /* For module specific items */ 35#include <linux/moduleparam.h> /* For new moduleparam's */ 36#include <linux/types.h> /* For standard types (like size_t) */ 37#include <linux/errno.h> /* For the -ENODEV/... values */ 38#include <linux/kernel.h> /* For printk/panic/... */ 39#include <linux/delay.h> /* For mdelay function */ 40#include <linux/miscdevice.h> /* For MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR) */ 41#include <linux/watchdog.h> /* For the watchdog specific items */ 42#include <linux/notifier.h> /* For notifier support */ 43#include <linux/reboot.h> /* For reboot_notifier stuff */ 44#include <linux/init.h> /* For __init/__exit/... */ 45#include <linux/fs.h> /* For file operations */ 46#include <linux/pci.h> /* For pci functions */ 47#include <linux/ioport.h> /* For io-port access */ 48#include <linux/spinlock.h> /* For spin_lock/spin_unlock/... */ 49 50#include <asm/uaccess.h> /* For copy_to_user/put_user/... */ 51#include <asm/io.h> /* For inb/outb/... */ 52 53/* Module and version information */ 54#define WATCHDOG_VERSION "1.03" 55#define WATCHDOG_DATE "21 Jan 2007" 56#define WATCHDOG_DRIVER_NAME "PCI-PC Watchdog" 57#define WATCHDOG_NAME "pcwd_pci" 58#define PFX WATCHDOG_NAME ": " 59#define DRIVER_VERSION WATCHDOG_DRIVER_NAME " driver, v" WATCHDOG_VERSION " (" WATCHDOG_DATE ")\n" 60 61/* Stuff for the PCI ID's */ 62#ifndef PCI_VENDOR_ID_QUICKLOGIC 63#define PCI_VENDOR_ID_QUICKLOGIC 0x11e3 64#endif 65 66#ifndef PCI_DEVICE_ID_WATCHDOG_PCIPCWD 67#define PCI_DEVICE_ID_WATCHDOG_PCIPCWD 0x5030 68#endif 69 70/* 71 * These are the defines that describe the control status bits for the 72 * PCI-PC Watchdog card. 73 */ 74/* Port 1 : Control Status #1 */ 75#define WD_PCI_WTRP 0x01 /* Watchdog Trip status */ 76#define WD_PCI_HRBT 0x02 /* Watchdog Heartbeat */ 77#define WD_PCI_TTRP 0x04 /* Temperature Trip status */ 78#define WD_PCI_RL2A 0x08 /* Relay 2 Active */ 79#define WD_PCI_RL1A 0x10 /* Relay 1 Active */ 80#define WD_PCI_R2DS 0x40 /* Relay 2 Disable Temperature-trip/reset */ 81#define WD_PCI_RLY2 0x80 /* Activate Relay 2 on the board */ 82/* Port 2 : Control Status #2 */ 83#define WD_PCI_WDIS 0x10 /* Watchdog Disable */ 84#define WD_PCI_ENTP 0x20 /* Enable Temperature Trip Reset */ 85#define WD_PCI_WRSP 0x40 /* Watchdog wrote response */ 86#define WD_PCI_PCMD 0x80 /* PC has sent command */ 87 88/* according to documentation max. time to process a command for the pci 89 * watchdog card is 100 ms, so we give it 150 ms to do it's job */ 90#define PCI_COMMAND_TIMEOUT 150 91 92/* Watchdog's internal commands */ 93#define CMD_GET_STATUS 0x04 94#define CMD_GET_FIRMWARE_VERSION 0x08 95#define CMD_READ_WATCHDOG_TIMEOUT 0x18 96#define CMD_WRITE_WATCHDOG_TIMEOUT 0x19 97#define CMD_GET_CLEAR_RESET_COUNT 0x84 98 99/* Watchdog's Dip Switch heartbeat values */ 100static const int heartbeat_tbl [] = { 101 5, /* OFF-OFF-OFF = 5 Sec */ 102 10, /* OFF-OFF-ON = 10 Sec */ 103 30, /* OFF-ON-OFF = 30 Sec */ 104 60, /* OFF-ON-ON = 1 Min */ 105 300, /* ON-OFF-OFF = 5 Min */ 106 600, /* ON-OFF-ON = 10 Min */ 107 1800, /* ON-ON-OFF = 30 Min */ 108 3600, /* ON-ON-ON = 1 hour */ 109}; 110 111/* We can only use 1 card due to the /dev/watchdog restriction */ 112static int cards_found; 113 114/* internal variables */ 115static int temp_panic; 116static unsigned long is_active; 117static char expect_release; 118static struct { /* this is private data for each PCI-PC watchdog card */ 119 int supports_temp; /* Wether or not the card has a temperature device */ 120 int boot_status; /* The card's boot status */ 121 unsigned long io_addr; /* The cards I/O address */ 122 spinlock_t io_lock; /* the lock for io operations */ 123 struct pci_dev *pdev; /* the PCI-device */ 124} pcipcwd_private; 125 126/* module parameters */ 127#define QUIET 0 /* Default */ 128#define VERBOSE 1 /* Verbose */ 129#define DEBUG 2 /* print fancy stuff too */ 130static int debug = QUIET; 131module_param(debug, int, 0); 132MODULE_PARM_DESC(debug, "Debug level: 0=Quiet, 1=Verbose, 2=Debug (default=0)"); 133 134#define WATCHDOG_HEARTBEAT 0 /* default heartbeat = delay-time from dip-switches */ 135static int heartbeat = WATCHDOG_HEARTBEAT; 136module_param(heartbeat, int, 0); 137MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds. (0<heartbeat<65536 or 0=delay-time from dip-switches, default=" __MODULE_STRING(WATCHDOG_HEARTBEAT) ")"); 138 139static int nowayout = WATCHDOG_NOWAYOUT; 140module_param(nowayout, int, 0); 141MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); 142 143/* 144 * Internal functions 145 */ 146 147static int send_command(int cmd, int *msb, int *lsb) 148{ 149 int got_response, count; 150 151 if (debug >= DEBUG) 152 printk(KERN_DEBUG PFX "sending following data cmd=0x%02x msb=0x%02x lsb=0x%02x\n", 153 cmd, *msb, *lsb); 154 155 spin_lock(&pcipcwd_private.io_lock); 156 /* If a command requires data it should be written first. 157 * Data for commands with 8 bits of data should be written to port 4. 158 * Commands with 16 bits of data, should be written as LSB to port 4 159 * and MSB to port 5. 160 * After the required data has been written then write the command to 161 * port 6. */ 162 outb_p(*lsb, pcipcwd_private.io_addr + 4); 163 outb_p(*msb, pcipcwd_private.io_addr + 5); 164 outb_p(cmd, pcipcwd_private.io_addr + 6); 165 166 /* wait till the pci card processed the command, signaled by 167 * the WRSP bit in port 2 and give it a max. timeout of 168 * PCI_COMMAND_TIMEOUT to process */ 169 got_response = inb_p(pcipcwd_private.io_addr + 2) & WD_PCI_WRSP; 170 for (count = 0; (count < PCI_COMMAND_TIMEOUT) && (!got_response); count++) { 171 mdelay(1); 172 got_response = inb_p(pcipcwd_private.io_addr + 2) & WD_PCI_WRSP; 173 } 174 175 if (debug >= DEBUG) { 176 if (got_response) { 177 printk(KERN_DEBUG PFX "time to process command was: %d ms\n", 178 count); 179 } else { 180 printk(KERN_DEBUG PFX "card did not respond on command!\n"); 181 } 182 } 183 184 if (got_response) { 185 /* read back response */ 186 *lsb = inb_p(pcipcwd_private.io_addr + 4); 187 *msb = inb_p(pcipcwd_private.io_addr + 5); 188 189 /* clear WRSP bit */ 190 inb_p(pcipcwd_private.io_addr + 6); 191 192 if (debug >= DEBUG) 193 printk(KERN_DEBUG PFX "received following data for cmd=0x%02x: msb=0x%02x lsb=0x%02x\n", 194 cmd, *msb, *lsb); 195 } 196 197 spin_unlock(&pcipcwd_private.io_lock); 198 199 return got_response; 200} 201 202static inline void pcipcwd_check_temperature_support(void) 203{ 204 if (inb_p(pcipcwd_private.io_addr) != 0xF0) 205 pcipcwd_private.supports_temp = 1; 206} 207 208static int pcipcwd_get_option_switches(void) 209{ 210 int option_switches; 211 212 option_switches = inb_p(pcipcwd_private.io_addr + 3); 213 return option_switches; 214} 215 216static void pcipcwd_show_card_info(void) 217{ 218 int got_fw_rev, fw_rev_major, fw_rev_minor; 219 char fw_ver_str[20]; /* The cards firmware version */ 220 int option_switches; 221 222 got_fw_rev = send_command(CMD_GET_FIRMWARE_VERSION, &fw_rev_major, &fw_rev_minor); 223 if (got_fw_rev) { 224 sprintf(fw_ver_str, "%u.%02u", fw_rev_major, fw_rev_minor); 225 } else { 226 sprintf(fw_ver_str, "<card no answer>"); 227 } 228 229 /* Get switch settings */ 230 option_switches = pcipcwd_get_option_switches(); 231 232 printk(KERN_INFO PFX "Found card at port 0x%04x (Firmware: %s) %s temp option\n", 233 (int) pcipcwd_private.io_addr, fw_ver_str, 234 (pcipcwd_private.supports_temp ? "with" : "without")); 235 236 printk(KERN_INFO PFX "Option switches (0x%02x): Temperature Reset Enable=%s, Power On Delay=%s\n", 237 option_switches, 238 ((option_switches & 0x10) ? "ON" : "OFF"), 239 ((option_switches & 0x08) ? "ON" : "OFF")); 240 241 if (pcipcwd_private.boot_status & WDIOF_CARDRESET) 242 printk(KERN_INFO PFX "Previous reset was caused by the Watchdog card\n"); 243 244 if (pcipcwd_private.boot_status & WDIOF_OVERHEAT) 245 printk(KERN_INFO PFX "Card sensed a CPU Overheat\n"); 246 247 if (pcipcwd_private.boot_status == 0) 248 printk(KERN_INFO PFX "No previous trip detected - Cold boot or reset\n"); 249} 250 251static int pcipcwd_start(void) 252{ 253 int stat_reg; 254 255 spin_lock(&pcipcwd_private.io_lock); 256 outb_p(0x00, pcipcwd_private.io_addr + 3); 257 udelay(1000); 258 259 stat_reg = inb_p(pcipcwd_private.io_addr + 2); 260 spin_unlock(&pcipcwd_private.io_lock); 261 262 if (stat_reg & WD_PCI_WDIS) { 263 printk(KERN_ERR PFX "Card timer not enabled\n"); 264 return -1; 265 } 266 267 if (debug >= VERBOSE) 268 printk(KERN_DEBUG PFX "Watchdog started\n"); 269 270 return 0; 271} 272 273static int pcipcwd_stop(void) 274{ 275 int stat_reg; 276 277 spin_lock(&pcipcwd_private.io_lock); 278 outb_p(0xA5, pcipcwd_private.io_addr + 3); 279 udelay(1000); 280 281 outb_p(0xA5, pcipcwd_private.io_addr + 3); 282 udelay(1000); 283 284 stat_reg = inb_p(pcipcwd_private.io_addr + 2); 285 spin_unlock(&pcipcwd_private.io_lock); 286 287 if (!(stat_reg & WD_PCI_WDIS)) { 288 printk(KERN_ERR PFX "Card did not acknowledge disable attempt\n"); 289 return -1; 290 } 291 292 if (debug >= VERBOSE) 293 printk(KERN_DEBUG PFX "Watchdog stopped\n"); 294 295 return 0; 296} 297 298static int pcipcwd_keepalive(void) 299{ 300 /* Re-trigger watchdog by writing to port 0 */ 301 spin_lock(&pcipcwd_private.io_lock); 302 outb_p(0x42, pcipcwd_private.io_addr); /* send out any data */ 303 spin_unlock(&pcipcwd_private.io_lock); 304 305 if (debug >= DEBUG) 306 printk(KERN_DEBUG PFX "Watchdog keepalive signal send\n"); 307 308 return 0; 309} 310 311static int pcipcwd_set_heartbeat(int t) 312{ 313 int t_msb = t / 256; 314 int t_lsb = t % 256; 315 316 if ((t < 0x0001) || (t > 0xFFFF)) 317 return -EINVAL; 318 319 /* Write new heartbeat to watchdog */ 320 send_command(CMD_WRITE_WATCHDOG_TIMEOUT, &t_msb, &t_lsb); 321 322 heartbeat = t; 323 if (debug >= VERBOSE) 324 printk(KERN_DEBUG PFX "New heartbeat: %d\n", 325 heartbeat); 326 327 return 0; 328} 329 330static int pcipcwd_get_status(int *status) 331{ 332 int control_status; 333 334 *status=0; 335 control_status = inb_p(pcipcwd_private.io_addr + 1); 336 if (control_status & WD_PCI_WTRP) 337 *status |= WDIOF_CARDRESET; 338 if (control_status & WD_PCI_TTRP) { 339 *status |= WDIOF_OVERHEAT; 340 if (temp_panic) 341 panic(PFX "Temperature overheat trip!\n"); 342 } 343 344 if (debug >= DEBUG) 345 printk(KERN_DEBUG PFX "Control Status #1: 0x%02x\n", 346 control_status); 347 348 return 0; 349} 350 351static int pcipcwd_clear_status(void) 352{ 353 int control_status; 354 int msb; 355 int reset_counter; 356 357 if (debug >= VERBOSE) 358 printk(KERN_INFO PFX "clearing watchdog trip status & LED\n"); 359 360 control_status = inb_p(pcipcwd_private.io_addr + 1); 361 362 if (debug >= DEBUG) { 363 printk(KERN_DEBUG PFX "status was: 0x%02x\n", control_status); 364 printk(KERN_DEBUG PFX "sending: 0x%02x\n", 365 (control_status & WD_PCI_R2DS) | WD_PCI_WTRP); 366 } 367 368 /* clear trip status & LED and keep mode of relay 2 */ 369 outb_p((control_status & WD_PCI_R2DS) | WD_PCI_WTRP, pcipcwd_private.io_addr + 1); 370 371 /* clear reset counter */ 372 msb=0; 373 reset_counter=0xff; 374 send_command(CMD_GET_CLEAR_RESET_COUNT, &msb, &reset_counter); 375 376 if (debug >= DEBUG) { 377 printk(KERN_DEBUG PFX "reset count was: 0x%02x\n", 378 reset_counter); 379 } 380 381 return 0; 382} 383 384static int pcipcwd_get_temperature(int *temperature) 385{ 386 *temperature = 0; 387 if (!pcipcwd_private.supports_temp) 388 return -ENODEV; 389 390 spin_lock(&pcipcwd_private.io_lock); 391 *temperature = inb_p(pcipcwd_private.io_addr); 392 spin_unlock(&pcipcwd_private.io_lock); 393 394 /* 395 * Convert celsius to fahrenheit, since this was 396 * the decided 'standard' for this return value. 397 */ 398 *temperature = (*temperature * 9 / 5) + 32; 399 400 if (debug >= DEBUG) { 401 printk(KERN_DEBUG PFX "temperature is: %d F\n", 402 *temperature); 403 } 404 405 return 0; 406} 407 408static int pcipcwd_get_timeleft(int *time_left) 409{ 410 int msb; 411 int lsb; 412 413 /* Read the time that's left before rebooting */ 414 /* Note: if the board is not yet armed then we will read 0xFFFF */ 415 send_command(CMD_READ_WATCHDOG_TIMEOUT, &msb, &lsb); 416 417 *time_left = (msb << 8) + lsb; 418 419 if (debug >= VERBOSE) 420 printk(KERN_DEBUG PFX "Time left before next reboot: %d\n", 421 *time_left); 422 423 return 0; 424} 425 426/* 427 * /dev/watchdog handling 428 */ 429 430static ssize_t pcipcwd_write(struct file *file, const char __user *data, 431 size_t len, loff_t *ppos) 432{ 433 /* See if we got the magic character 'V' and reload the timer */ 434 if (len) { 435 if (!nowayout) { 436 size_t i; 437 438 /* note: just in case someone wrote the magic character 439 * five months ago... */ 440 expect_release = 0; 441 442 /* scan to see whether or not we got the magic character */ 443 for (i = 0; i != len; i++) { 444 char c; 445 if(get_user(c, data+i)) 446 return -EFAULT; 447 if (c == 'V') 448 expect_release = 42; 449 } 450 } 451 452 /* someone wrote to us, we should reload the timer */ 453 pcipcwd_keepalive(); 454 } 455 return len; 456} 457 458static int pcipcwd_ioctl(struct inode *inode, struct file *file, 459 unsigned int cmd, unsigned long arg) 460{ 461 void __user *argp = (void __user *)arg; 462 int __user *p = argp; 463 static struct watchdog_info ident = { 464 .options = WDIOF_OVERHEAT | 465 WDIOF_CARDRESET | 466 WDIOF_KEEPALIVEPING | 467 WDIOF_SETTIMEOUT | 468 WDIOF_MAGICCLOSE, 469 .firmware_version = 1, 470 .identity = WATCHDOG_DRIVER_NAME, 471 }; 472 473 switch (cmd) { 474 case WDIOC_GETSUPPORT: 475 return copy_to_user(argp, &ident, 476 sizeof (ident)) ? -EFAULT : 0; 477 478 case WDIOC_GETSTATUS: 479 { 480 int status; 481 482 pcipcwd_get_status(&status); 483 484 return put_user(status, p); 485 } 486 487 case WDIOC_GETBOOTSTATUS: 488 return put_user(pcipcwd_private.boot_status, p); 489 490 case WDIOC_GETTEMP: 491 { 492 int temperature; 493 494 if (pcipcwd_get_temperature(&temperature)) 495 return -EFAULT; 496 497 return put_user(temperature, p); 498 } 499 500 case WDIOC_KEEPALIVE: 501 pcipcwd_keepalive(); 502 return 0; 503 504 case WDIOC_SETOPTIONS: 505 { 506 int new_options, retval = -EINVAL; 507 508 if (get_user (new_options, p)) 509 return -EFAULT; 510 511 if (new_options & WDIOS_DISABLECARD) { 512 if (pcipcwd_stop()) 513 return -EIO; 514 retval = 0; 515 } 516 517 if (new_options & WDIOS_ENABLECARD) { 518 if (pcipcwd_start()) 519 return -EIO; 520 retval = 0; 521 } 522 523 if (new_options & WDIOS_TEMPPANIC) { 524 temp_panic = 1; 525 retval = 0; 526 } 527 528 return retval; 529 } 530 531 case WDIOC_SETTIMEOUT: 532 { 533 int new_heartbeat; 534 535 if (get_user(new_heartbeat, p)) 536 return -EFAULT; 537 538 if (pcipcwd_set_heartbeat(new_heartbeat)) 539 return -EINVAL; 540 541 pcipcwd_keepalive(); 542 /* Fall */ 543 } 544 545 case WDIOC_GETTIMEOUT: 546 return put_user(heartbeat, p); 547 548 case WDIOC_GETTIMELEFT: 549 { 550 int time_left; 551 552 if (pcipcwd_get_timeleft(&time_left)) 553 return -EFAULT; 554 555 return put_user(time_left, p); 556 } 557 558 default: 559 return -ENOTTY; 560 } 561} 562 563static int pcipcwd_open(struct inode *inode, struct file *file) 564{ 565 /* /dev/watchdog can only be opened once */ 566 if (test_and_set_bit(0, &is_active)) { 567 if (debug >= VERBOSE) 568 printk(KERN_ERR PFX "Attempt to open already opened device.\n"); 569 return -EBUSY; 570 } 571 572 /* Activate */ 573 pcipcwd_start(); 574 pcipcwd_keepalive(); 575 return nonseekable_open(inode, file); 576} 577 578static int pcipcwd_release(struct inode *inode, struct file *file) 579{ 580 /* 581 * Shut off the timer. 582 */ 583 if (expect_release == 42) { 584 pcipcwd_stop(); 585 } else { 586 printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n"); 587 pcipcwd_keepalive(); 588 } 589 expect_release = 0; 590 clear_bit(0, &is_active); 591 return 0; 592} 593 594/* 595 * /dev/temperature handling 596 */ 597 598static ssize_t pcipcwd_temp_read(struct file *file, char __user *data, 599 size_t len, loff_t *ppos) 600{ 601 int temperature; 602 603 if (pcipcwd_get_temperature(&temperature)) 604 return -EFAULT; 605 606 if (copy_to_user (data, &temperature, 1)) 607 return -EFAULT; 608 609 return 1; 610} 611 612static int pcipcwd_temp_open(struct inode *inode, struct file *file) 613{ 614 if (!pcipcwd_private.supports_temp) 615 return -ENODEV; 616 617 return nonseekable_open(inode, file); 618} 619 620static int pcipcwd_temp_release(struct inode *inode, struct file *file) 621{ 622 return 0; 623} 624 625/* 626 * Notify system 627 */ 628 629static int pcipcwd_notify_sys(struct notifier_block *this, unsigned long code, void *unused) 630{ 631 if (code==SYS_DOWN || code==SYS_HALT) { 632 /* Turn the WDT off */ 633 pcipcwd_stop(); 634 } 635 636 return NOTIFY_DONE; 637} 638 639/* 640 * Kernel Interfaces 641 */ 642 643static const struct file_operations pcipcwd_fops = { 644 .owner = THIS_MODULE, 645 .llseek = no_llseek, 646 .write = pcipcwd_write, 647 .ioctl = pcipcwd_ioctl, 648 .open = pcipcwd_open, 649 .release = pcipcwd_release, 650}; 651 652static struct miscdevice pcipcwd_miscdev = { 653 .minor = WATCHDOG_MINOR, 654 .name = "watchdog", 655 .fops = &pcipcwd_fops, 656}; 657 658static const struct file_operations pcipcwd_temp_fops = { 659 .owner = THIS_MODULE, 660 .llseek = no_llseek, 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 routines 678 */ 679 680static int __devinit 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 printk(KERN_INFO PFX DRIVER_VERSION); 688 689 if (cards_found > 1) { 690 printk(KERN_ERR PFX "This driver only supports 1 device\n"); 691 return -ENODEV; 692 } 693 694 if (pci_enable_device(pdev)) { 695 printk(KERN_ERR PFX "Not possible to enable PCI Device\n"); 696 return -ENODEV; 697 } 698 699 if (pci_resource_start(pdev, 0) == 0x0000) { 700 printk(KERN_ERR PFX "No I/O-Address for card detected\n"); 701 ret = -ENODEV; 702 goto err_out_disable_device; 703 } 704 705 pcipcwd_private.pdev = pdev; 706 pcipcwd_private.io_addr = pci_resource_start(pdev, 0); 707 708 if (pci_request_regions(pdev, WATCHDOG_NAME)) { 709 printk(KERN_ERR PFX "I/O address 0x%04x already in use\n", 710 (int) pcipcwd_private.io_addr); 711 ret = -EIO; 712 goto err_out_disable_device; 713 } 714 715 /* get the boot_status */ 716 pcipcwd_get_status(&pcipcwd_private.boot_status); 717 718 /* clear the "card caused reboot" flag */ 719 pcipcwd_clear_status(); 720 721 /* disable card */ 722 pcipcwd_stop(); 723 724 /* Check whether or not the card supports the temperature device */ 725 pcipcwd_check_temperature_support(); 726 727 /* Show info about the card itself */ 728 pcipcwd_show_card_info(); 729 730 /* If heartbeat = 0 then we use the heartbeat from the dip-switches */ 731 if (heartbeat == 0) 732 heartbeat = heartbeat_tbl[(pcipcwd_get_option_switches() & 0x07)]; 733 734 /* Check that the heartbeat value is within it's range ; if not reset to the default */ 735 if (pcipcwd_set_heartbeat(heartbeat)) { 736 pcipcwd_set_heartbeat(WATCHDOG_HEARTBEAT); 737 printk(KERN_INFO PFX "heartbeat value must be 0<heartbeat<65536, using %d\n", 738 WATCHDOG_HEARTBEAT); 739 } 740 741 ret = register_reboot_notifier(&pcipcwd_notifier); 742 if (ret != 0) { 743 printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n", 744 ret); 745 goto err_out_release_region; 746 } 747 748 if (pcipcwd_private.supports_temp) { 749 ret = misc_register(&pcipcwd_temp_miscdev); 750 if (ret != 0) { 751 printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n", 752 TEMP_MINOR, ret); 753 goto err_out_unregister_reboot; 754 } 755 } 756 757 ret = misc_register(&pcipcwd_miscdev); 758 if (ret != 0) { 759 printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n", 760 WATCHDOG_MINOR, ret); 761 goto err_out_misc_deregister; 762 } 763 764 printk(KERN_INFO PFX "initialized. heartbeat=%d sec (nowayout=%d)\n", 765 heartbeat, nowayout); 766 767 return 0; 768 769err_out_misc_deregister: 770 if (pcipcwd_private.supports_temp) 771 misc_deregister(&pcipcwd_temp_miscdev); 772err_out_unregister_reboot: 773 unregister_reboot_notifier(&pcipcwd_notifier); 774err_out_release_region: 775 pci_release_regions(pdev); 776err_out_disable_device: 777 pci_disable_device(pdev); 778 return ret; 779} 780 781static void __devexit pcipcwd_card_exit(struct pci_dev *pdev) 782{ 783 /* Stop the timer before we leave */ 784 if (!nowayout) 785 pcipcwd_stop(); 786 787 /* Deregister */ 788 misc_deregister(&pcipcwd_miscdev); 789 if (pcipcwd_private.supports_temp) 790 misc_deregister(&pcipcwd_temp_miscdev); 791 unregister_reboot_notifier(&pcipcwd_notifier); 792 pci_release_regions(pdev); 793 pci_disable_device(pdev); 794 cards_found--; 795} 796 797static struct pci_device_id pcipcwd_pci_tbl[] = { 798 { PCI_VENDOR_ID_QUICKLOGIC, PCI_DEVICE_ID_WATCHDOG_PCIPCWD, 799 PCI_ANY_ID, PCI_ANY_ID, }, 800 { 0 }, /* End of list */ 801}; 802MODULE_DEVICE_TABLE(pci, pcipcwd_pci_tbl); 803 804static struct pci_driver pcipcwd_driver = { 805 .name = WATCHDOG_NAME, 806 .id_table = pcipcwd_pci_tbl, 807 .probe = pcipcwd_card_init, 808 .remove = __devexit_p(pcipcwd_card_exit), 809}; 810 811static int __init pcipcwd_init_module(void) 812{ 813 spin_lock_init(&pcipcwd_private.io_lock); 814 815 return pci_register_driver(&pcipcwd_driver); 816} 817 818static void __exit pcipcwd_cleanup_module(void) 819{ 820 pci_unregister_driver(&pcipcwd_driver); 821 822 printk(KERN_INFO PFX "Watchdog Module Unloaded.\n"); 823} 824 825module_init(pcipcwd_init_module); 826module_exit(pcipcwd_cleanup_module); 827 828MODULE_AUTHOR("Wim Van Sebroeck <wim@iguana.be>"); 829MODULE_DESCRIPTION("Berkshire PCI-PC Watchdog driver"); 830MODULE_LICENSE("GPL"); 831MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR); 832MODULE_ALIAS_MISCDEV(TEMP_MINOR); 833