1b7e04f8cSWim Van Sebroeck /* 2b7e04f8cSWim Van Sebroeck * Industrial Computer Source WDT500/501 driver 3b7e04f8cSWim Van Sebroeck * 4b7e04f8cSWim Van Sebroeck * (c) Copyright 1996-1997 Alan Cox <alan@redhat.com>, All Rights Reserved. 5b7e04f8cSWim Van Sebroeck * http://www.redhat.com 6b7e04f8cSWim Van Sebroeck * 7b7e04f8cSWim Van Sebroeck * This program is free software; you can redistribute it and/or 8b7e04f8cSWim Van Sebroeck * modify it under the terms of the GNU General Public License 9b7e04f8cSWim Van Sebroeck * as published by the Free Software Foundation; either version 10b7e04f8cSWim Van Sebroeck * 2 of the License, or (at your option) any later version. 11b7e04f8cSWim Van Sebroeck * 12b7e04f8cSWim Van Sebroeck * Neither Alan Cox nor CymruNet Ltd. admit liability nor provide 13b7e04f8cSWim Van Sebroeck * warranty for any of this software. This material is provided 14b7e04f8cSWim Van Sebroeck * "AS-IS" and at no charge. 15b7e04f8cSWim Van Sebroeck * 16b7e04f8cSWim Van Sebroeck * (c) Copyright 1995 Alan Cox <alan@lxorguk.ukuu.org.uk> 17b7e04f8cSWim Van Sebroeck * 18b7e04f8cSWim Van Sebroeck * Release 0.10. 19b7e04f8cSWim Van Sebroeck * 20b7e04f8cSWim Van Sebroeck * Fixes 21b7e04f8cSWim Van Sebroeck * Dave Gregorich : Modularisation and minor bugs 22b7e04f8cSWim Van Sebroeck * Alan Cox : Added the watchdog ioctl() stuff 23b7e04f8cSWim Van Sebroeck * Alan Cox : Fixed the reboot problem (as noted by 24b7e04f8cSWim Van Sebroeck * Matt Crocker). 25b7e04f8cSWim Van Sebroeck * Alan Cox : Added wdt= boot option 26b7e04f8cSWim Van Sebroeck * Alan Cox : Cleaned up copy/user stuff 27*9f2d1f0dSAlan Cox * Tim Hockin : Added insmod parameters, comment 28*9f2d1f0dSAlan Cox * cleanup, parameterized timeout 29*9f2d1f0dSAlan Cox * Tigran Aivazian : Restructured wdt_init() to handle 30*9f2d1f0dSAlan Cox * failures 31b7e04f8cSWim Van Sebroeck * Joel Becker : Added WDIOC_GET/SETTIMEOUT 32b7e04f8cSWim Van Sebroeck * Matt Domsch : Added nowayout module option 33b7e04f8cSWim Van Sebroeck */ 34b7e04f8cSWim Van Sebroeck 35b7e04f8cSWim Van Sebroeck #include <linux/interrupt.h> 36b7e04f8cSWim Van Sebroeck #include <linux/module.h> 37b7e04f8cSWim Van Sebroeck #include <linux/moduleparam.h> 38b7e04f8cSWim Van Sebroeck #include <linux/types.h> 39b7e04f8cSWim Van Sebroeck #include <linux/miscdevice.h> 40b7e04f8cSWim Van Sebroeck #include <linux/watchdog.h> 41b7e04f8cSWim Van Sebroeck #include <linux/fs.h> 42b7e04f8cSWim Van Sebroeck #include <linux/ioport.h> 43b7e04f8cSWim Van Sebroeck #include <linux/notifier.h> 44b7e04f8cSWim Van Sebroeck #include <linux/reboot.h> 45b7e04f8cSWim Van Sebroeck #include <linux/init.h> 46*9f2d1f0dSAlan Cox #include <linux/io.h> 47*9f2d1f0dSAlan Cox #include <linux/uaccess.h> 48b7e04f8cSWim Van Sebroeck 49b7e04f8cSWim Van Sebroeck #include <asm/system.h> 50b7e04f8cSWim Van Sebroeck #include "wd501p.h" 51b7e04f8cSWim Van Sebroeck 52b7e04f8cSWim Van Sebroeck static unsigned long wdt_is_open; 53b7e04f8cSWim Van Sebroeck static char expect_close; 54b7e04f8cSWim Van Sebroeck 55b7e04f8cSWim Van Sebroeck /* 56b7e04f8cSWim Van Sebroeck * Module parameters 57b7e04f8cSWim Van Sebroeck */ 58b7e04f8cSWim Van Sebroeck 59b7e04f8cSWim Van Sebroeck #define WD_TIMO 60 /* Default heartbeat = 60 seconds */ 60b7e04f8cSWim Van Sebroeck 61b7e04f8cSWim Van Sebroeck static int heartbeat = WD_TIMO; 62b7e04f8cSWim Van Sebroeck static int wd_heartbeat; 63b7e04f8cSWim Van Sebroeck module_param(heartbeat, int, 0); 64*9f2d1f0dSAlan Cox MODULE_PARM_DESC(heartbeat, 65*9f2d1f0dSAlan Cox "Watchdog heartbeat in seconds. (0 < heartbeat < 65536, default=" 66*9f2d1f0dSAlan Cox __MODULE_STRING(WD_TIMO) ")"); 67b7e04f8cSWim Van Sebroeck 68b7e04f8cSWim Van Sebroeck static int nowayout = WATCHDOG_NOWAYOUT; 69b7e04f8cSWim Van Sebroeck module_param(nowayout, int, 0); 70*9f2d1f0dSAlan Cox MODULE_PARM_DESC(nowayout, 71*9f2d1f0dSAlan Cox "Watchdog cannot be stopped once started (default=" 72*9f2d1f0dSAlan Cox __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); 73b7e04f8cSWim Van Sebroeck 74b7e04f8cSWim Van Sebroeck /* You must set these - there is no sane way to probe for this board. */ 75b7e04f8cSWim Van Sebroeck static int io = 0x240; 76b7e04f8cSWim Van Sebroeck static int irq = 11; 77b7e04f8cSWim Van Sebroeck 7801c785dcSAlan Cox static DEFINE_SPINLOCK(wdt_lock); 7901c785dcSAlan Cox 80b7e04f8cSWim Van Sebroeck module_param(io, int, 0); 81b7e04f8cSWim Van Sebroeck MODULE_PARM_DESC(io, "WDT io port (default=0x240)"); 82b7e04f8cSWim Van Sebroeck module_param(irq, int, 0); 83b7e04f8cSWim Van Sebroeck MODULE_PARM_DESC(irq, "WDT irq (default=11)"); 84b7e04f8cSWim Van Sebroeck 85b7e04f8cSWim Van Sebroeck #ifdef CONFIG_WDT_501 86b7e04f8cSWim Van Sebroeck /* Support for the Fan Tachometer on the WDT501-P */ 87b7e04f8cSWim Van Sebroeck static int tachometer; 88b7e04f8cSWim Van Sebroeck 89b7e04f8cSWim Van Sebroeck module_param(tachometer, int, 0); 90*9f2d1f0dSAlan Cox MODULE_PARM_DESC(tachometer, 91*9f2d1f0dSAlan Cox "WDT501-P Fan Tachometer support (0=disable, default=0)"); 92b7e04f8cSWim Van Sebroeck #endif /* CONFIG_WDT_501 */ 93b7e04f8cSWim Van Sebroeck 94b7e04f8cSWim Van Sebroeck /* 95b7e04f8cSWim Van Sebroeck * Programming support 96b7e04f8cSWim Van Sebroeck */ 97b7e04f8cSWim Van Sebroeck 98b7e04f8cSWim Van Sebroeck static void wdt_ctr_mode(int ctr, int mode) 99b7e04f8cSWim Van Sebroeck { 100b7e04f8cSWim Van Sebroeck ctr <<= 6; 101b7e04f8cSWim Van Sebroeck ctr |= 0x30; 102b7e04f8cSWim Van Sebroeck ctr |= (mode << 1); 103b7e04f8cSWim Van Sebroeck outb_p(ctr, WDT_CR); 104b7e04f8cSWim Van Sebroeck } 105b7e04f8cSWim Van Sebroeck 106b7e04f8cSWim Van Sebroeck static void wdt_ctr_load(int ctr, int val) 107b7e04f8cSWim Van Sebroeck { 108b7e04f8cSWim Van Sebroeck outb_p(val&0xFF, WDT_COUNT0+ctr); 109b7e04f8cSWim Van Sebroeck outb_p(val>>8, WDT_COUNT0+ctr); 110b7e04f8cSWim Van Sebroeck } 111b7e04f8cSWim Van Sebroeck 112b7e04f8cSWim Van Sebroeck /** 113b7e04f8cSWim Van Sebroeck * wdt_start: 114b7e04f8cSWim Van Sebroeck * 115b7e04f8cSWim Van Sebroeck * Start the watchdog driver. 116b7e04f8cSWim Van Sebroeck */ 117b7e04f8cSWim Van Sebroeck 118b7e04f8cSWim Van Sebroeck static int wdt_start(void) 119b7e04f8cSWim Van Sebroeck { 12001c785dcSAlan Cox unsigned long flags; 12101c785dcSAlan Cox spin_lock_irqsave(&wdt_lock, flags); 122b7e04f8cSWim Van Sebroeck inb_p(WDT_DC); /* Disable watchdog */ 123*9f2d1f0dSAlan Cox wdt_ctr_mode(0, 3); /* Program CTR0 for Mode 3: 124*9f2d1f0dSAlan Cox Square Wave Generator */ 125*9f2d1f0dSAlan Cox wdt_ctr_mode(1, 2); /* Program CTR1 for Mode 2: 126*9f2d1f0dSAlan Cox Rate Generator */ 127*9f2d1f0dSAlan Cox wdt_ctr_mode(2, 0); /* Program CTR2 for Mode 0: 128*9f2d1f0dSAlan Cox Pulse on Terminal Count */ 129b7e04f8cSWim Van Sebroeck wdt_ctr_load(0, 8948); /* Count at 100Hz */ 130b7e04f8cSWim Van Sebroeck wdt_ctr_load(1, wd_heartbeat); /* Heartbeat */ 131b7e04f8cSWim Van Sebroeck wdt_ctr_load(2, 65535); /* Length of reset pulse */ 132b7e04f8cSWim Van Sebroeck outb_p(0, WDT_DC); /* Enable watchdog */ 13301c785dcSAlan Cox spin_unlock_irqrestore(&wdt_lock, flags); 134b7e04f8cSWim Van Sebroeck return 0; 135b7e04f8cSWim Van Sebroeck } 136b7e04f8cSWim Van Sebroeck 137b7e04f8cSWim Van Sebroeck /** 138b7e04f8cSWim Van Sebroeck * wdt_stop: 139b7e04f8cSWim Van Sebroeck * 140b7e04f8cSWim Van Sebroeck * Stop the watchdog driver. 141b7e04f8cSWim Van Sebroeck */ 142b7e04f8cSWim Van Sebroeck 143b7e04f8cSWim Van Sebroeck static int wdt_stop(void) 144b7e04f8cSWim Van Sebroeck { 14501c785dcSAlan Cox unsigned long flags; 14601c785dcSAlan Cox spin_lock_irqsave(&wdt_lock, flags); 147b7e04f8cSWim Van Sebroeck /* Turn the card off */ 148b7e04f8cSWim Van Sebroeck inb_p(WDT_DC); /* Disable watchdog */ 149b7e04f8cSWim Van Sebroeck wdt_ctr_load(2, 0); /* 0 length reset pulses now */ 15001c785dcSAlan Cox spin_unlock_irqrestore(&wdt_lock, flags); 151b7e04f8cSWim Van Sebroeck return 0; 152b7e04f8cSWim Van Sebroeck } 153b7e04f8cSWim Van Sebroeck 154b7e04f8cSWim Van Sebroeck /** 155b7e04f8cSWim Van Sebroeck * wdt_ping: 156b7e04f8cSWim Van Sebroeck * 157*9f2d1f0dSAlan Cox * Reload counter one with the watchdog heartbeat. We don't bother 158*9f2d1f0dSAlan Cox * reloading the cascade counter. 159b7e04f8cSWim Van Sebroeck */ 160b7e04f8cSWim Van Sebroeck 161b7e04f8cSWim Van Sebroeck static int wdt_ping(void) 162b7e04f8cSWim Van Sebroeck { 16301c785dcSAlan Cox unsigned long flags; 16401c785dcSAlan Cox spin_lock_irqsave(&wdt_lock, flags); 165b7e04f8cSWim Van Sebroeck /* Write a watchdog value */ 166b7e04f8cSWim Van Sebroeck inb_p(WDT_DC); /* Disable watchdog */ 167*9f2d1f0dSAlan Cox wdt_ctr_mode(1, 2); /* Re-Program CTR1 for Mode 2: 168*9f2d1f0dSAlan Cox Rate Generator */ 169b7e04f8cSWim Van Sebroeck wdt_ctr_load(1, wd_heartbeat); /* Heartbeat */ 170b7e04f8cSWim Van Sebroeck outb_p(0, WDT_DC); /* Enable watchdog */ 17101c785dcSAlan Cox spin_unlock_irqrestore(&wdt_lock, flags); 172b7e04f8cSWim Van Sebroeck return 0; 173b7e04f8cSWim Van Sebroeck } 174b7e04f8cSWim Van Sebroeck 175b7e04f8cSWim Van Sebroeck /** 176b7e04f8cSWim Van Sebroeck * wdt_set_heartbeat: 177b7e04f8cSWim Van Sebroeck * @t: the new heartbeat value that needs to be set. 178b7e04f8cSWim Van Sebroeck * 179*9f2d1f0dSAlan Cox * Set a new heartbeat value for the watchdog device. If the heartbeat 180*9f2d1f0dSAlan Cox * value is incorrect we keep the old value and return -EINVAL. If 181*9f2d1f0dSAlan Cox * successful we return 0. 182b7e04f8cSWim Van Sebroeck */ 183*9f2d1f0dSAlan Cox 184b7e04f8cSWim Van Sebroeck static int wdt_set_heartbeat(int t) 185b7e04f8cSWim Van Sebroeck { 186*9f2d1f0dSAlan Cox if (t < 1 || t > 65535) 187b7e04f8cSWim Van Sebroeck return -EINVAL; 188b7e04f8cSWim Van Sebroeck 189b7e04f8cSWim Van Sebroeck heartbeat = t; 190b7e04f8cSWim Van Sebroeck wd_heartbeat = t * 100; 191b7e04f8cSWim Van Sebroeck return 0; 192b7e04f8cSWim Van Sebroeck } 193b7e04f8cSWim Van Sebroeck 194b7e04f8cSWim Van Sebroeck /** 195b7e04f8cSWim Van Sebroeck * wdt_get_status: 196b7e04f8cSWim Van Sebroeck * @status: the new status. 197b7e04f8cSWim Van Sebroeck * 198b7e04f8cSWim Van Sebroeck * Extract the status information from a WDT watchdog device. There are 199b7e04f8cSWim Van Sebroeck * several board variants so we have to know which bits are valid. Some 200b7e04f8cSWim Van Sebroeck * bits default to one and some to zero in order to be maximally painful. 201b7e04f8cSWim Van Sebroeck * 202b7e04f8cSWim Van Sebroeck * we then map the bits onto the status ioctl flags. 203b7e04f8cSWim Van Sebroeck */ 204b7e04f8cSWim Van Sebroeck 205b7e04f8cSWim Van Sebroeck static int wdt_get_status(int *status) 206b7e04f8cSWim Van Sebroeck { 20701c785dcSAlan Cox unsigned char new_status; 20801c785dcSAlan Cox unsigned long flags; 20901c785dcSAlan Cox 21001c785dcSAlan Cox spin_lock_irqsave(&wdt_lock, flags); 21101c785dcSAlan Cox new_status = inb_p(WDT_SR); 21201c785dcSAlan Cox spin_unlock_irqrestore(&wdt_lock, flags); 213b7e04f8cSWim Van Sebroeck 214b7e04f8cSWim Van Sebroeck *status = 0; 215b7e04f8cSWim Van Sebroeck if (new_status & WDC_SR_ISOI0) 216b7e04f8cSWim Van Sebroeck *status |= WDIOF_EXTERN1; 217b7e04f8cSWim Van Sebroeck if (new_status & WDC_SR_ISII1) 218b7e04f8cSWim Van Sebroeck *status |= WDIOF_EXTERN2; 219b7e04f8cSWim Van Sebroeck #ifdef CONFIG_WDT_501 220b7e04f8cSWim Van Sebroeck if (!(new_status & WDC_SR_TGOOD)) 221b7e04f8cSWim Van Sebroeck *status |= WDIOF_OVERHEAT; 222b7e04f8cSWim Van Sebroeck if (!(new_status & WDC_SR_PSUOVER)) 223b7e04f8cSWim Van Sebroeck *status |= WDIOF_POWEROVER; 224b7e04f8cSWim Van Sebroeck if (!(new_status & WDC_SR_PSUUNDR)) 225b7e04f8cSWim Van Sebroeck *status |= WDIOF_POWERUNDER; 226b7e04f8cSWim Van Sebroeck if (tachometer) { 227b7e04f8cSWim Van Sebroeck if (!(new_status & WDC_SR_FANGOOD)) 228b7e04f8cSWim Van Sebroeck *status |= WDIOF_FANFAULT; 229b7e04f8cSWim Van Sebroeck } 230b7e04f8cSWim Van Sebroeck #endif /* CONFIG_WDT_501 */ 231b7e04f8cSWim Van Sebroeck return 0; 232b7e04f8cSWim Van Sebroeck } 233b7e04f8cSWim Van Sebroeck 234b7e04f8cSWim Van Sebroeck #ifdef CONFIG_WDT_501 235b7e04f8cSWim Van Sebroeck /** 236b7e04f8cSWim Van Sebroeck * wdt_get_temperature: 237b7e04f8cSWim Van Sebroeck * 238b7e04f8cSWim Van Sebroeck * Reports the temperature in degrees Fahrenheit. The API is in 239b7e04f8cSWim Van Sebroeck * farenheit. It was designed by an imperial measurement luddite. 240b7e04f8cSWim Van Sebroeck */ 241b7e04f8cSWim Van Sebroeck 242b7e04f8cSWim Van Sebroeck static int wdt_get_temperature(int *temperature) 243b7e04f8cSWim Van Sebroeck { 24401c785dcSAlan Cox unsigned short c; 24501c785dcSAlan Cox unsigned long flags; 246b7e04f8cSWim Van Sebroeck 24701c785dcSAlan Cox spin_lock_irqsave(&wdt_lock, flags); 24801c785dcSAlan Cox c = inb_p(WDT_RT); 24901c785dcSAlan Cox spin_unlock_irqrestore(&wdt_lock, flags); 250b7e04f8cSWim Van Sebroeck *temperature = (c * 11 / 15) + 7; 251b7e04f8cSWim Van Sebroeck return 0; 252b7e04f8cSWim Van Sebroeck } 253b7e04f8cSWim Van Sebroeck #endif /* CONFIG_WDT_501 */ 254b7e04f8cSWim Van Sebroeck 255b7e04f8cSWim Van Sebroeck /** 256b7e04f8cSWim Van Sebroeck * wdt_interrupt: 257b7e04f8cSWim Van Sebroeck * @irq: Interrupt number 258b7e04f8cSWim Van Sebroeck * @dev_id: Unused as we don't allow multiple devices. 259b7e04f8cSWim Van Sebroeck * 260b7e04f8cSWim Van Sebroeck * Handle an interrupt from the board. These are raised when the status 261b7e04f8cSWim Van Sebroeck * map changes in what the board considers an interesting way. That means 262b7e04f8cSWim Van Sebroeck * a failure condition occurring. 263b7e04f8cSWim Van Sebroeck */ 264b7e04f8cSWim Van Sebroeck 265b7e04f8cSWim Van Sebroeck static irqreturn_t wdt_interrupt(int irq, void *dev_id) 266b7e04f8cSWim Van Sebroeck { 267b7e04f8cSWim Van Sebroeck /* 268b7e04f8cSWim Van Sebroeck * Read the status register see what is up and 269b7e04f8cSWim Van Sebroeck * then printk it. 270b7e04f8cSWim Van Sebroeck */ 27101c785dcSAlan Cox unsigned char status; 27201c785dcSAlan Cox 27301c785dcSAlan Cox spin_lock(&wdt_lock); 27401c785dcSAlan Cox status = inb_p(WDT_SR); 275b7e04f8cSWim Van Sebroeck 276b7e04f8cSWim Van Sebroeck printk(KERN_CRIT "WDT status %d\n", status); 277b7e04f8cSWim Van Sebroeck 278b7e04f8cSWim Van Sebroeck #ifdef CONFIG_WDT_501 279b7e04f8cSWim Van Sebroeck if (!(status & WDC_SR_TGOOD)) 280b7e04f8cSWim Van Sebroeck printk(KERN_CRIT "Overheat alarm.(%d)\n", inb_p(WDT_RT)); 281b7e04f8cSWim Van Sebroeck if (!(status & WDC_SR_PSUOVER)) 282b7e04f8cSWim Van Sebroeck printk(KERN_CRIT "PSU over voltage.\n"); 283b7e04f8cSWim Van Sebroeck if (!(status & WDC_SR_PSUUNDR)) 284b7e04f8cSWim Van Sebroeck printk(KERN_CRIT "PSU under voltage.\n"); 285b7e04f8cSWim Van Sebroeck if (tachometer) { 286b7e04f8cSWim Van Sebroeck if (!(status & WDC_SR_FANGOOD)) 287b7e04f8cSWim Van Sebroeck printk(KERN_CRIT "Possible fan fault.\n"); 288b7e04f8cSWim Van Sebroeck } 289b7e04f8cSWim Van Sebroeck #endif /* CONFIG_WDT_501 */ 29059338d4cSIlpo Jarvinen if (!(status & WDC_SR_WCCR)) { 291b7e04f8cSWim Van Sebroeck #ifdef SOFTWARE_REBOOT 292b7e04f8cSWim Van Sebroeck #ifdef ONLY_TESTING 293b7e04f8cSWim Van Sebroeck printk(KERN_CRIT "Would Reboot.\n"); 294b7e04f8cSWim Van Sebroeck #else 295b7e04f8cSWim Van Sebroeck printk(KERN_CRIT "Initiating system reboot.\n"); 296b7e04f8cSWim Van Sebroeck emergency_restart(); 297b7e04f8cSWim Van Sebroeck #endif 298b7e04f8cSWim Van Sebroeck #else 299b7e04f8cSWim Van Sebroeck printk(KERN_CRIT "Reset in 5ms.\n"); 300b7e04f8cSWim Van Sebroeck #endif 30159338d4cSIlpo Jarvinen } 30201c785dcSAlan Cox spin_unlock(&wdt_lock); 303b7e04f8cSWim Van Sebroeck return IRQ_HANDLED; 304b7e04f8cSWim Van Sebroeck } 305b7e04f8cSWim Van Sebroeck 306b7e04f8cSWim Van Sebroeck 307b7e04f8cSWim Van Sebroeck /** 308b7e04f8cSWim Van Sebroeck * wdt_write: 309b7e04f8cSWim Van Sebroeck * @file: file handle to the watchdog 310b7e04f8cSWim Van Sebroeck * @buf: buffer to write (unused as data does not matter here 311b7e04f8cSWim Van Sebroeck * @count: count of bytes 312b7e04f8cSWim Van Sebroeck * @ppos: pointer to the position to write. No seeks allowed 313b7e04f8cSWim Van Sebroeck * 314b7e04f8cSWim Van Sebroeck * A write to a watchdog device is defined as a keepalive signal. Any 315b7e04f8cSWim Van Sebroeck * write of data will do, as we we don't define content meaning. 316b7e04f8cSWim Van Sebroeck */ 317b7e04f8cSWim Van Sebroeck 318*9f2d1f0dSAlan Cox static ssize_t wdt_write(struct file *file, const char __user *buf, 319*9f2d1f0dSAlan Cox size_t count, loff_t *ppos) 320b7e04f8cSWim Van Sebroeck { 321b7e04f8cSWim Van Sebroeck if (count) { 322b7e04f8cSWim Van Sebroeck if (!nowayout) { 323b7e04f8cSWim Van Sebroeck size_t i; 324b7e04f8cSWim Van Sebroeck 325b7e04f8cSWim Van Sebroeck /* In case it was set long ago */ 326b7e04f8cSWim Van Sebroeck expect_close = 0; 327b7e04f8cSWim Van Sebroeck 328b7e04f8cSWim Van Sebroeck for (i = 0; i != count; i++) { 329b7e04f8cSWim Van Sebroeck char c; 330b7e04f8cSWim Van Sebroeck if (get_user(c, buf + i)) 331b7e04f8cSWim Van Sebroeck return -EFAULT; 332b7e04f8cSWim Van Sebroeck if (c == 'V') 333b7e04f8cSWim Van Sebroeck expect_close = 42; 334b7e04f8cSWim Van Sebroeck } 335b7e04f8cSWim Van Sebroeck } 336b7e04f8cSWim Van Sebroeck wdt_ping(); 337b7e04f8cSWim Van Sebroeck } 338b7e04f8cSWim Van Sebroeck return count; 339b7e04f8cSWim Van Sebroeck } 340b7e04f8cSWim Van Sebroeck 341b7e04f8cSWim Van Sebroeck /** 342b7e04f8cSWim Van Sebroeck * wdt_ioctl: 343b7e04f8cSWim Van Sebroeck * @file: file handle to the device 344b7e04f8cSWim Van Sebroeck * @cmd: watchdog command 345b7e04f8cSWim Van Sebroeck * @arg: argument pointer 346b7e04f8cSWim Van Sebroeck * 347b7e04f8cSWim Van Sebroeck * The watchdog API defines a common set of functions for all watchdogs 348b7e04f8cSWim Van Sebroeck * according to their available features. We only actually usefully support 349b7e04f8cSWim Van Sebroeck * querying capabilities and current status. 350b7e04f8cSWim Van Sebroeck */ 351b7e04f8cSWim Van Sebroeck 352*9f2d1f0dSAlan Cox static long wdt_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 353b7e04f8cSWim Van Sebroeck { 354b7e04f8cSWim Van Sebroeck void __user *argp = (void __user *)arg; 355b7e04f8cSWim Van Sebroeck int __user *p = argp; 356b7e04f8cSWim Van Sebroeck int new_heartbeat; 357b7e04f8cSWim Van Sebroeck int status; 358b7e04f8cSWim Van Sebroeck 359b7e04f8cSWim Van Sebroeck static struct watchdog_info ident = { 360b7e04f8cSWim Van Sebroeck .options = WDIOF_SETTIMEOUT| 361b7e04f8cSWim Van Sebroeck WDIOF_MAGICCLOSE| 362b7e04f8cSWim Van Sebroeck WDIOF_KEEPALIVEPING, 363b7e04f8cSWim Van Sebroeck .firmware_version = 1, 364b7e04f8cSWim Van Sebroeck .identity = "WDT500/501", 365b7e04f8cSWim Van Sebroeck }; 366b7e04f8cSWim Van Sebroeck 367b7e04f8cSWim Van Sebroeck /* Add options according to the card we have */ 368b7e04f8cSWim Van Sebroeck ident.options |= (WDIOF_EXTERN1|WDIOF_EXTERN2); 369b7e04f8cSWim Van Sebroeck #ifdef CONFIG_WDT_501 370b7e04f8cSWim Van Sebroeck ident.options |= (WDIOF_OVERHEAT|WDIOF_POWERUNDER|WDIOF_POWEROVER); 371b7e04f8cSWim Van Sebroeck if (tachometer) 372b7e04f8cSWim Van Sebroeck ident.options |= WDIOF_FANFAULT; 373b7e04f8cSWim Van Sebroeck #endif /* CONFIG_WDT_501 */ 374b7e04f8cSWim Van Sebroeck 375*9f2d1f0dSAlan Cox switch (cmd) { 376b7e04f8cSWim Van Sebroeck default: 377b7e04f8cSWim Van Sebroeck return -ENOTTY; 378b7e04f8cSWim Van Sebroeck case WDIOC_GETSUPPORT: 379b7e04f8cSWim Van Sebroeck return copy_to_user(argp, &ident, sizeof(ident)) ? -EFAULT : 0; 380b7e04f8cSWim Van Sebroeck case WDIOC_GETSTATUS: 381b7e04f8cSWim Van Sebroeck wdt_get_status(&status); 382b7e04f8cSWim Van Sebroeck return put_user(status, p); 383b7e04f8cSWim Van Sebroeck case WDIOC_GETBOOTSTATUS: 384b7e04f8cSWim Van Sebroeck return put_user(0, p); 385b7e04f8cSWim Van Sebroeck case WDIOC_KEEPALIVE: 386b7e04f8cSWim Van Sebroeck wdt_ping(); 387b7e04f8cSWim Van Sebroeck return 0; 388b7e04f8cSWim Van Sebroeck case WDIOC_SETTIMEOUT: 389b7e04f8cSWim Van Sebroeck if (get_user(new_heartbeat, p)) 390b7e04f8cSWim Van Sebroeck return -EFAULT; 391b7e04f8cSWim Van Sebroeck if (wdt_set_heartbeat(new_heartbeat)) 392b7e04f8cSWim Van Sebroeck return -EINVAL; 393b7e04f8cSWim Van Sebroeck wdt_ping(); 394b7e04f8cSWim Van Sebroeck /* Fall */ 395b7e04f8cSWim Van Sebroeck case WDIOC_GETTIMEOUT: 396b7e04f8cSWim Van Sebroeck return put_user(heartbeat, p); 397b7e04f8cSWim Van Sebroeck } 398b7e04f8cSWim Van Sebroeck } 399b7e04f8cSWim Van Sebroeck 400b7e04f8cSWim Van Sebroeck /** 401b7e04f8cSWim Van Sebroeck * wdt_open: 402b7e04f8cSWim Van Sebroeck * @inode: inode of device 403b7e04f8cSWim Van Sebroeck * @file: file handle to device 404b7e04f8cSWim Van Sebroeck * 405b7e04f8cSWim Van Sebroeck * The watchdog device has been opened. The watchdog device is single 406b7e04f8cSWim Van Sebroeck * open and on opening we load the counters. Counter zero is a 100Hz 407b7e04f8cSWim Van Sebroeck * cascade, into counter 1 which downcounts to reboot. When the counter 408b7e04f8cSWim Van Sebroeck * triggers counter 2 downcounts the length of the reset pulse which 409b7e04f8cSWim Van Sebroeck * set set to be as long as possible. 410b7e04f8cSWim Van Sebroeck */ 411b7e04f8cSWim Van Sebroeck 412b7e04f8cSWim Van Sebroeck static int wdt_open(struct inode *inode, struct file *file) 413b7e04f8cSWim Van Sebroeck { 414b7e04f8cSWim Van Sebroeck if (test_and_set_bit(0, &wdt_is_open)) 415b7e04f8cSWim Van Sebroeck return -EBUSY; 416b7e04f8cSWim Van Sebroeck /* 417b7e04f8cSWim Van Sebroeck * Activate 418b7e04f8cSWim Van Sebroeck */ 419b7e04f8cSWim Van Sebroeck wdt_start(); 420b7e04f8cSWim Van Sebroeck return nonseekable_open(inode, file); 421b7e04f8cSWim Van Sebroeck } 422b7e04f8cSWim Van Sebroeck 423b7e04f8cSWim Van Sebroeck /** 424b7e04f8cSWim Van Sebroeck * wdt_release: 425b7e04f8cSWim Van Sebroeck * @inode: inode to board 426b7e04f8cSWim Van Sebroeck * @file: file handle to board 427b7e04f8cSWim Van Sebroeck * 428b7e04f8cSWim Van Sebroeck * The watchdog has a configurable API. There is a religious dispute 429b7e04f8cSWim Van Sebroeck * between people who want their watchdog to be able to shut down and 430b7e04f8cSWim Van Sebroeck * those who want to be sure if the watchdog manager dies the machine 431b7e04f8cSWim Van Sebroeck * reboots. In the former case we disable the counters, in the latter 432b7e04f8cSWim Van Sebroeck * case you have to open it again very soon. 433b7e04f8cSWim Van Sebroeck */ 434b7e04f8cSWim Van Sebroeck 435b7e04f8cSWim Van Sebroeck static int wdt_release(struct inode *inode, struct file *file) 436b7e04f8cSWim Van Sebroeck { 437b7e04f8cSWim Van Sebroeck if (expect_close == 42) { 438b7e04f8cSWim Van Sebroeck wdt_stop(); 439b7e04f8cSWim Van Sebroeck clear_bit(0, &wdt_is_open); 440b7e04f8cSWim Van Sebroeck } else { 441*9f2d1f0dSAlan Cox printk(KERN_CRIT 442*9f2d1f0dSAlan Cox "wdt: WDT device closed unexpectedly. WDT will not stop!\n"); 443b7e04f8cSWim Van Sebroeck wdt_ping(); 444b7e04f8cSWim Van Sebroeck } 445b7e04f8cSWim Van Sebroeck expect_close = 0; 446b7e04f8cSWim Van Sebroeck return 0; 447b7e04f8cSWim Van Sebroeck } 448b7e04f8cSWim Van Sebroeck 449b7e04f8cSWim Van Sebroeck #ifdef CONFIG_WDT_501 450b7e04f8cSWim Van Sebroeck /** 451b7e04f8cSWim Van Sebroeck * wdt_temp_read: 452b7e04f8cSWim Van Sebroeck * @file: file handle to the watchdog board 453b7e04f8cSWim Van Sebroeck * @buf: buffer to write 1 byte into 454b7e04f8cSWim Van Sebroeck * @count: length of buffer 455b7e04f8cSWim Van Sebroeck * @ptr: offset (no seek allowed) 456b7e04f8cSWim Van Sebroeck * 457b7e04f8cSWim Van Sebroeck * Temp_read reports the temperature in degrees Fahrenheit. The API is in 458b7e04f8cSWim Van Sebroeck * farenheit. It was designed by an imperial measurement luddite. 459b7e04f8cSWim Van Sebroeck */ 460b7e04f8cSWim Van Sebroeck 461*9f2d1f0dSAlan Cox static ssize_t wdt_temp_read(struct file *file, char __user *buf, 462*9f2d1f0dSAlan Cox size_t count, loff_t *ptr) 463b7e04f8cSWim Van Sebroeck { 464b7e04f8cSWim Van Sebroeck int temperature; 465b7e04f8cSWim Van Sebroeck 466b7e04f8cSWim Van Sebroeck if (wdt_get_temperature(&temperature)) 467b7e04f8cSWim Van Sebroeck return -EFAULT; 468b7e04f8cSWim Van Sebroeck 469b7e04f8cSWim Van Sebroeck if (copy_to_user(buf, &temperature, 1)) 470b7e04f8cSWim Van Sebroeck return -EFAULT; 471b7e04f8cSWim Van Sebroeck 472b7e04f8cSWim Van Sebroeck return 1; 473b7e04f8cSWim Van Sebroeck } 474b7e04f8cSWim Van Sebroeck 475b7e04f8cSWim Van Sebroeck /** 476b7e04f8cSWim Van Sebroeck * wdt_temp_open: 477b7e04f8cSWim Van Sebroeck * @inode: inode of device 478b7e04f8cSWim Van Sebroeck * @file: file handle to device 479b7e04f8cSWim Van Sebroeck * 480b7e04f8cSWim Van Sebroeck * The temperature device has been opened. 481b7e04f8cSWim Van Sebroeck */ 482b7e04f8cSWim Van Sebroeck 483b7e04f8cSWim Van Sebroeck static int wdt_temp_open(struct inode *inode, struct file *file) 484b7e04f8cSWim Van Sebroeck { 485b7e04f8cSWim Van Sebroeck return nonseekable_open(inode, file); 486b7e04f8cSWim Van Sebroeck } 487b7e04f8cSWim Van Sebroeck 488b7e04f8cSWim Van Sebroeck /** 489b7e04f8cSWim Van Sebroeck * wdt_temp_release: 490b7e04f8cSWim Van Sebroeck * @inode: inode to board 491b7e04f8cSWim Van Sebroeck * @file: file handle to board 492b7e04f8cSWim Van Sebroeck * 493b7e04f8cSWim Van Sebroeck * The temperature device has been closed. 494b7e04f8cSWim Van Sebroeck */ 495b7e04f8cSWim Van Sebroeck 496b7e04f8cSWim Van Sebroeck static int wdt_temp_release(struct inode *inode, struct file *file) 497b7e04f8cSWim Van Sebroeck { 498b7e04f8cSWim Van Sebroeck return 0; 499b7e04f8cSWim Van Sebroeck } 500b7e04f8cSWim Van Sebroeck #endif /* CONFIG_WDT_501 */ 501b7e04f8cSWim Van Sebroeck 502b7e04f8cSWim Van Sebroeck /** 503b7e04f8cSWim Van Sebroeck * notify_sys: 504b7e04f8cSWim Van Sebroeck * @this: our notifier block 505b7e04f8cSWim Van Sebroeck * @code: the event being reported 506b7e04f8cSWim Van Sebroeck * @unused: unused 507b7e04f8cSWim Van Sebroeck * 508b7e04f8cSWim Van Sebroeck * Our notifier is called on system shutdowns. We want to turn the card 509b7e04f8cSWim Van Sebroeck * off at reboot otherwise the machine will reboot again during memory 510b7e04f8cSWim Van Sebroeck * test or worse yet during the following fsck. This would suck, in fact 511b7e04f8cSWim Van Sebroeck * trust me - if it happens it does suck. 512b7e04f8cSWim Van Sebroeck */ 513b7e04f8cSWim Van Sebroeck 514b7e04f8cSWim Van Sebroeck static int wdt_notify_sys(struct notifier_block *this, unsigned long code, 515b7e04f8cSWim Van Sebroeck void *unused) 516b7e04f8cSWim Van Sebroeck { 517*9f2d1f0dSAlan Cox if (code == SYS_DOWN || code == SYS_HALT) 518b7e04f8cSWim Van Sebroeck wdt_stop(); 519b7e04f8cSWim Van Sebroeck return NOTIFY_DONE; 520b7e04f8cSWim Van Sebroeck } 521b7e04f8cSWim Van Sebroeck 522b7e04f8cSWim Van Sebroeck /* 523b7e04f8cSWim Van Sebroeck * Kernel Interfaces 524b7e04f8cSWim Van Sebroeck */ 525b7e04f8cSWim Van Sebroeck 526b7e04f8cSWim Van Sebroeck 527b7e04f8cSWim Van Sebroeck static const struct file_operations wdt_fops = { 528b7e04f8cSWim Van Sebroeck .owner = THIS_MODULE, 529b7e04f8cSWim Van Sebroeck .llseek = no_llseek, 530b7e04f8cSWim Van Sebroeck .write = wdt_write, 531*9f2d1f0dSAlan Cox .unlocked_ioctl = wdt_ioctl, 532b7e04f8cSWim Van Sebroeck .open = wdt_open, 533b7e04f8cSWim Van Sebroeck .release = wdt_release, 534b7e04f8cSWim Van Sebroeck }; 535b7e04f8cSWim Van Sebroeck 536b7e04f8cSWim Van Sebroeck static struct miscdevice wdt_miscdev = { 537b7e04f8cSWim Van Sebroeck .minor = WATCHDOG_MINOR, 538b7e04f8cSWim Van Sebroeck .name = "watchdog", 539b7e04f8cSWim Van Sebroeck .fops = &wdt_fops, 540b7e04f8cSWim Van Sebroeck }; 541b7e04f8cSWim Van Sebroeck 542b7e04f8cSWim Van Sebroeck #ifdef CONFIG_WDT_501 543b7e04f8cSWim Van Sebroeck static const struct file_operations wdt_temp_fops = { 544b7e04f8cSWim Van Sebroeck .owner = THIS_MODULE, 545b7e04f8cSWim Van Sebroeck .llseek = no_llseek, 546b7e04f8cSWim Van Sebroeck .read = wdt_temp_read, 547b7e04f8cSWim Van Sebroeck .open = wdt_temp_open, 548b7e04f8cSWim Van Sebroeck .release = wdt_temp_release, 549b7e04f8cSWim Van Sebroeck }; 550b7e04f8cSWim Van Sebroeck 551b7e04f8cSWim Van Sebroeck static struct miscdevice temp_miscdev = { 552b7e04f8cSWim Van Sebroeck .minor = TEMP_MINOR, 553b7e04f8cSWim Van Sebroeck .name = "temperature", 554b7e04f8cSWim Van Sebroeck .fops = &wdt_temp_fops, 555b7e04f8cSWim Van Sebroeck }; 556b7e04f8cSWim Van Sebroeck #endif /* CONFIG_WDT_501 */ 557b7e04f8cSWim Van Sebroeck 558b7e04f8cSWim Van Sebroeck /* 559b7e04f8cSWim Van Sebroeck * The WDT card needs to learn about soft shutdowns in order to 560b7e04f8cSWim Van Sebroeck * turn the timebomb registers off. 561b7e04f8cSWim Van Sebroeck */ 562b7e04f8cSWim Van Sebroeck 563b7e04f8cSWim Van Sebroeck static struct notifier_block wdt_notifier = { 564b7e04f8cSWim Van Sebroeck .notifier_call = wdt_notify_sys, 565b7e04f8cSWim Van Sebroeck }; 566b7e04f8cSWim Van Sebroeck 567b7e04f8cSWim Van Sebroeck /** 568b7e04f8cSWim Van Sebroeck * cleanup_module: 569b7e04f8cSWim Van Sebroeck * 570b7e04f8cSWim Van Sebroeck * Unload the watchdog. You cannot do this with any file handles open. 571b7e04f8cSWim Van Sebroeck * If your watchdog is set to continue ticking on close and you unload 572b7e04f8cSWim Van Sebroeck * it, well it keeps ticking. We won't get the interrupt but the board 573b7e04f8cSWim Van Sebroeck * will not touch PC memory so all is fine. You just have to load a new 574b7e04f8cSWim Van Sebroeck * module in 60 seconds or reboot. 575b7e04f8cSWim Van Sebroeck */ 576b7e04f8cSWim Van Sebroeck 577b7e04f8cSWim Van Sebroeck static void __exit wdt_exit(void) 578b7e04f8cSWim Van Sebroeck { 579b7e04f8cSWim Van Sebroeck misc_deregister(&wdt_miscdev); 580b7e04f8cSWim Van Sebroeck #ifdef CONFIG_WDT_501 581b7e04f8cSWim Van Sebroeck misc_deregister(&temp_miscdev); 582b7e04f8cSWim Van Sebroeck #endif /* CONFIG_WDT_501 */ 583b7e04f8cSWim Van Sebroeck unregister_reboot_notifier(&wdt_notifier); 584b7e04f8cSWim Van Sebroeck free_irq(irq, NULL); 585b7e04f8cSWim Van Sebroeck release_region(io, 8); 586b7e04f8cSWim Van Sebroeck } 587b7e04f8cSWim Van Sebroeck 588b7e04f8cSWim Van Sebroeck /** 589b7e04f8cSWim Van Sebroeck * wdt_init: 590b7e04f8cSWim Van Sebroeck * 591b7e04f8cSWim Van Sebroeck * Set up the WDT watchdog board. All we have to do is grab the 592b7e04f8cSWim Van Sebroeck * resources we require and bitch if anyone beat us to them. 593b7e04f8cSWim Van Sebroeck * The open() function will actually kick the board off. 594b7e04f8cSWim Van Sebroeck */ 595b7e04f8cSWim Van Sebroeck 596b7e04f8cSWim Van Sebroeck static int __init wdt_init(void) 597b7e04f8cSWim Van Sebroeck { 598b7e04f8cSWim Van Sebroeck int ret; 599b7e04f8cSWim Van Sebroeck 600*9f2d1f0dSAlan Cox /* Check that the heartbeat value is within it's range; 601*9f2d1f0dSAlan Cox if not reset to the default */ 602b7e04f8cSWim Van Sebroeck if (wdt_set_heartbeat(heartbeat)) { 603b7e04f8cSWim Van Sebroeck wdt_set_heartbeat(WD_TIMO); 604b7e04f8cSWim Van Sebroeck printk(KERN_INFO "wdt: heartbeat value must be 0 < heartbeat < 65536, using %d\n", 605b7e04f8cSWim Van Sebroeck WD_TIMO); 606b7e04f8cSWim Van Sebroeck } 607b7e04f8cSWim Van Sebroeck 608b7e04f8cSWim Van Sebroeck if (!request_region(io, 8, "wdt501p")) { 609*9f2d1f0dSAlan Cox printk(KERN_ERR 610*9f2d1f0dSAlan Cox "wdt: I/O address 0x%04x already in use\n", io); 611b7e04f8cSWim Van Sebroeck ret = -EBUSY; 612b7e04f8cSWim Van Sebroeck goto out; 613b7e04f8cSWim Van Sebroeck } 614b7e04f8cSWim Van Sebroeck 615b7e04f8cSWim Van Sebroeck ret = request_irq(irq, wdt_interrupt, IRQF_DISABLED, "wdt501p", NULL); 616b7e04f8cSWim Van Sebroeck if (ret) { 617b7e04f8cSWim Van Sebroeck printk(KERN_ERR "wdt: IRQ %d is not free.\n", irq); 618b7e04f8cSWim Van Sebroeck goto outreg; 619b7e04f8cSWim Van Sebroeck } 620b7e04f8cSWim Van Sebroeck 621b7e04f8cSWim Van Sebroeck ret = register_reboot_notifier(&wdt_notifier); 622b7e04f8cSWim Van Sebroeck if (ret) { 623*9f2d1f0dSAlan Cox printk(KERN_ERR 624*9f2d1f0dSAlan Cox "wdt: cannot register reboot notifier (err=%d)\n", ret); 625b7e04f8cSWim Van Sebroeck goto outirq; 626b7e04f8cSWim Van Sebroeck } 627b7e04f8cSWim Van Sebroeck 628b7e04f8cSWim Van Sebroeck #ifdef CONFIG_WDT_501 629b7e04f8cSWim Van Sebroeck ret = misc_register(&temp_miscdev); 630b7e04f8cSWim Van Sebroeck if (ret) { 631*9f2d1f0dSAlan Cox printk(KERN_ERR 632*9f2d1f0dSAlan Cox "wdt: cannot register miscdev on minor=%d (err=%d)\n", 633b7e04f8cSWim Van Sebroeck TEMP_MINOR, ret); 634b7e04f8cSWim Van Sebroeck goto outrbt; 635b7e04f8cSWim Van Sebroeck } 636b7e04f8cSWim Van Sebroeck #endif /* CONFIG_WDT_501 */ 637b7e04f8cSWim Van Sebroeck 638b7e04f8cSWim Van Sebroeck ret = misc_register(&wdt_miscdev); 639b7e04f8cSWim Van Sebroeck if (ret) { 640*9f2d1f0dSAlan Cox printk(KERN_ERR 641*9f2d1f0dSAlan Cox "wdt: cannot register miscdev on minor=%d (err=%d)\n", 642b7e04f8cSWim Van Sebroeck WATCHDOG_MINOR, ret); 643b7e04f8cSWim Van Sebroeck goto outmisc; 644b7e04f8cSWim Van Sebroeck } 645b7e04f8cSWim Van Sebroeck 646b7e04f8cSWim Van Sebroeck ret = 0; 647b7e04f8cSWim Van Sebroeck printk(KERN_INFO "WDT500/501-P driver 0.10 at 0x%04x (Interrupt %d). heartbeat=%d sec (nowayout=%d)\n", 648b7e04f8cSWim Van Sebroeck io, irq, heartbeat, nowayout); 649b7e04f8cSWim Van Sebroeck #ifdef CONFIG_WDT_501 650*9f2d1f0dSAlan Cox printk(KERN_INFO "wdt: Fan Tachometer is %s\n", 651*9f2d1f0dSAlan Cox (tachometer ? "Enabled" : "Disabled")); 652b7e04f8cSWim Van Sebroeck #endif /* CONFIG_WDT_501 */ 653b7e04f8cSWim Van Sebroeck 654b7e04f8cSWim Van Sebroeck out: 655b7e04f8cSWim Van Sebroeck return ret; 656b7e04f8cSWim Van Sebroeck 657b7e04f8cSWim Van Sebroeck outmisc: 658b7e04f8cSWim Van Sebroeck #ifdef CONFIG_WDT_501 659b7e04f8cSWim Van Sebroeck misc_deregister(&temp_miscdev); 660b7e04f8cSWim Van Sebroeck outrbt: 661b7e04f8cSWim Van Sebroeck #endif /* CONFIG_WDT_501 */ 662b7e04f8cSWim Van Sebroeck unregister_reboot_notifier(&wdt_notifier); 663b7e04f8cSWim Van Sebroeck outirq: 664b7e04f8cSWim Van Sebroeck free_irq(irq, NULL); 665b7e04f8cSWim Van Sebroeck outreg: 666b7e04f8cSWim Van Sebroeck release_region(io, 8); 667b7e04f8cSWim Van Sebroeck goto out; 668b7e04f8cSWim Van Sebroeck } 669b7e04f8cSWim Van Sebroeck 670b7e04f8cSWim Van Sebroeck module_init(wdt_init); 671b7e04f8cSWim Van Sebroeck module_exit(wdt_exit); 672b7e04f8cSWim Van Sebroeck 673b7e04f8cSWim Van Sebroeck MODULE_AUTHOR("Alan Cox"); 674b7e04f8cSWim Van Sebroeck MODULE_DESCRIPTION("Driver for ISA ICS watchdog cards (WDT500/501)"); 675b7e04f8cSWim Van Sebroeck MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR); 676b7e04f8cSWim Van Sebroeck MODULE_ALIAS_MISCDEV(TEMP_MINOR); 677b7e04f8cSWim Van Sebroeck MODULE_LICENSE("GPL"); 678