11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 21da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Industrial Computer Source PCI-WDT500/501 driver 31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 429fa0586de4fe518f122a915b8c6e92d12e8ca7fAlan Cox * (c) Copyright 1996-1997 Alan Cox <alan@lxorguk.ukuu.org.uk>, 59b901ee0cb007eb4e2ee056e5b1c5c2837d53bdbWim Van Sebroeck * All Rights Reserved. 61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This program is free software; you can redistribute it and/or 81da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * modify it under the terms of the GNU General Public License 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * as published by the Free Software Foundation; either version 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2 of the License, or (at your option) any later version. 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Neither Alan Cox nor CymruNet Ltd. admit liability nor provide 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * warranty for any of this software. This material is provided 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * "AS-IS" and at no charge. 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (c) Copyright 1995 Alan Cox <alan@lxorguk.ukuu.org.uk> 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Release 0.10. 191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Fixes 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Dave Gregorich : Modularisation and minor bugs 221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Alan Cox : Added the watchdog ioctl() stuff 231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Alan Cox : Fixed the reboot problem (as noted by 241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Matt Crocker). 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Alan Cox : Added wdt= boot option 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Alan Cox : Cleaned up copy/user stuff 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Tim Hockin : Added insmod parameters, comment cleanup 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Parameterized timeout 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * JP Nollmann : Added support for PCI wdt501p 301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Alan Cox : Split ISA and PCI cards into two drivers 311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Jeff Garzik : PCI cleanups 329f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox * Tigran Aivazian : Restructured wdtpci_init_one() to handle 339f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox * failures 345f3b27569fc0286a51f8d0655c7fb4f5b36aea65Wim Van Sebroeck * Joel Becker : Added WDIOC_GET/SETTIMEOUT 359f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox * Zwane Mwaikambo : Magic char closing, locking changes, 369f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox * cleanups 371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Matt Domsch : nowayout module option 381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4027c766aaacb265d625dc634bf7903f7f9fd0c697Joe Perches#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 4127c766aaacb265d625dc634bf7903f7f9fd0c697Joe Perches 421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/interrupt.h> 431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/module.h> 441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/moduleparam.h> 451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/types.h> 461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/miscdevice.h> 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/watchdog.h> 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/ioport.h> 4981830061bbae282d37c9af30084a1116b6239520Andrew Morton#include <linux/delay.h> 501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/notifier.h> 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/reboot.h> 521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/init.h> 531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/fs.h> 541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/pci.h> 559f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox#include <linux/io.h> 569f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox#include <linux/uaccess.h> 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define WDT_IS_PCI 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "wd501p.h" 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* We can only use 1 card due to the /dev/watchdog restriction */ 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int dev_count; 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 659f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Coxstatic unsigned long open_lock; 66c7dfd0cca300c5dc49213cf1c78c77393600410dAlexey Dobriyanstatic DEFINE_SPINLOCK(wdtpci_lock); 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic char expect_close; 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 69d1833c21256e7b0ac3997493d31f0f3926f6d592Randy Dunlapstatic resource_size_t io; 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int irq; 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Default timeout */ 731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define WD_TIMO 60 /* Default heartbeat = 60 seconds */ 741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int heartbeat = WD_TIMO; 761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int wd_heartbeat; 771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_param(heartbeat, int, 0); 789f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan CoxMODULE_PARM_DESC(heartbeat, 799f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox "Watchdog heartbeat in seconds. (0<heartbeat<65536, default=" 809f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox __MODULE_STRING(WD_TIMO) ")"); 811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8286a1e1896c2710402e29a875d8d830244274244dWim Van Sebroeckstatic bool nowayout = WATCHDOG_NOWAYOUT; 8386a1e1896c2710402e29a875d8d830244274244dWim Van Sebroeckmodule_param(nowayout, bool, 0); 849f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan CoxMODULE_PARM_DESC(nowayout, 859f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox "Watchdog cannot be stopped once started (default=" 869f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); 871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Support for the Fan Tachometer on the PCI-WDT501 */ 891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int tachometer; 901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_param(tachometer, int, 0); 919f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan CoxMODULE_PARM_DESC(tachometer, 929b901ee0cb007eb4e2ee056e5b1c5c2837d53bdbWim Van Sebroeck "PCI-WDT501 Fan Tachometer support (0=disable, default=0)"); 939b901ee0cb007eb4e2ee056e5b1c5c2837d53bdbWim Van Sebroeck 949b901ee0cb007eb4e2ee056e5b1c5c2837d53bdbWim Van Sebroeckstatic int type = 500; 959b901ee0cb007eb4e2ee056e5b1c5c2837d53bdbWim Van Sebroeckmodule_param(type, int, 0); 969b901ee0cb007eb4e2ee056e5b1c5c2837d53bdbWim Van SebroeckMODULE_PARM_DESC(type, 979b901ee0cb007eb4e2ee056e5b1c5c2837d53bdbWim Van Sebroeck "PCI-WDT501 Card type (500 or 501 , default=500)"); 981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 1001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Programming support 1011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void wdtpci_ctr_mode(int ctr, int mode) 1041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1059f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox ctr <<= 6; 1069f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox ctr |= 0x30; 1079f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox ctr |= (mode << 1); 1089f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox outb(ctr, WDT_CR); 1099f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox udelay(8); 1101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void wdtpci_ctr_load(int ctr, int val) 1131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1149f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox outb(val & 0xFF, WDT_COUNT0 + ctr); 1159f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox udelay(8); 1169f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox outb(val >> 8, WDT_COUNT0 + ctr); 1179f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox udelay(8); 1181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 1211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * wdtpci_start: 1221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Start the watchdog driver. 1241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int wdtpci_start(void) 1271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 1291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&wdtpci_lock, flags); 1311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 1331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * "pet" the watchdog, as Access says. 1341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This resets the clock outputs. 1351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1369f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox inb(WDT_DC); /* Disable watchdog */ 1379f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox udelay(8); 1389f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox wdtpci_ctr_mode(2, 0); /* Program CTR2 for Mode 0: 1399f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox Pulse on Terminal Count */ 1409f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox outb(0, WDT_DC); /* Enable watchdog */ 1419f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox udelay(8); 1429f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox inb(WDT_DC); /* Disable watchdog */ 1439f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox udelay(8); 1449f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox outb(0, WDT_CLOCK); /* 2.0833MHz clock */ 1459f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox udelay(8); 1469f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox inb(WDT_BUZZER); /* disable */ 1479f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox udelay(8); 1489f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox inb(WDT_OPTONOTRST); /* disable */ 1499f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox udelay(8); 1509f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox inb(WDT_OPTORST); /* disable */ 1519f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox udelay(8); 1529f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox inb(WDT_PROGOUT); /* disable */ 1539f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox udelay(8); 1549f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox wdtpci_ctr_mode(0, 3); /* Program CTR0 for Mode 3: 1559f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox Square Wave Generator */ 1569f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox wdtpci_ctr_mode(1, 2); /* Program CTR1 for Mode 2: 1579f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox Rate Generator */ 1589f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox wdtpci_ctr_mode(2, 1); /* Program CTR2 for Mode 1: 1599f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox Retriggerable One-Shot */ 1609f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox wdtpci_ctr_load(0, 20833); /* count at 100Hz */ 1619f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox wdtpci_ctr_load(1, wd_heartbeat);/* Heartbeat */ 1621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* DO NOT LOAD CTR2 on PCI card! -- JPN */ 1639f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox outb(0, WDT_DC); /* Enable watchdog */ 1649f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox udelay(8); 1651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&wdtpci_lock, flags); 1671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 1681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 1711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * wdtpci_stop: 1721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Stop the watchdog driver. 1741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1769f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Coxstatic int wdtpci_stop(void) 1771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 1791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Turn the card off */ 1811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&wdtpci_lock, flags); 1829f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox inb(WDT_DC); /* Disable watchdog */ 1839f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox udelay(8); 1849f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox wdtpci_ctr_load(2, 0); /* 0 length reset pulses now */ 1851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&wdtpci_lock, flags); 1861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 1871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 1901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * wdtpci_ping: 1911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1929f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox * Reload counter one with the watchdog heartbeat. We don't bother 1939f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox * reloading the cascade counter. 1941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int wdtpci_ping(void) 1971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 1991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&wdtpci_lock, flags); 2019f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox /* Write a watchdog value */ 2029f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox inb(WDT_DC); /* Disable watchdog */ 2039f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox udelay(8); 2049f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox wdtpci_ctr_mode(1, 2); /* Re-Program CTR1 for Mode 2: 2059f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox Rate Generator */ 2069f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox wdtpci_ctr_load(1, wd_heartbeat);/* Heartbeat */ 2079f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox outb(0, WDT_DC); /* Enable watchdog */ 2089f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox udelay(8); 2091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&wdtpci_lock, flags); 2101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 2111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 2141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * wdtpci_set_heartbeat: 2151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @t: the new heartbeat value that needs to be set. 2161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2179f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox * Set a new heartbeat value for the watchdog device. If the heartbeat 2189f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox * value is incorrect we keep the old value and return -EINVAL. 2199f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox * If successful we return 0. 2201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int wdtpci_set_heartbeat(int t) 2221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Arbitrary, can't find the card's limits */ 2249f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox if (t < 1 || t > 65535) 2251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 2261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds heartbeat = t; 2281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wd_heartbeat = t * 100; 2291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 2301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 2331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * wdtpci_get_status: 2341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @status: the new status. 2351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Extract the status information from a WDT watchdog device. There are 2371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * several board variants so we have to know which bits are valid. Some 2381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * bits default to one and some to zero in order to be maximally painful. 2391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * we then map the bits onto the status ioctl flags. 2411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int wdtpci_get_status(int *status) 2441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2459f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox unsigned char new_status; 2469f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox unsigned long flags; 2479f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox 2489f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox spin_lock_irqsave(&wdtpci_lock, flags); 2499f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox new_status = inb(WDT_SR); 2509f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox spin_unlock_irqrestore(&wdtpci_lock, flags); 2511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2529f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox *status = 0; 2531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (new_status & WDC_SR_ISOI0) 2541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *status |= WDIOF_EXTERN1; 2551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (new_status & WDC_SR_ISII1) 2561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *status |= WDIOF_EXTERN2; 2579b901ee0cb007eb4e2ee056e5b1c5c2837d53bdbWim Van Sebroeck if (type == 501) { 2589b901ee0cb007eb4e2ee056e5b1c5c2837d53bdbWim Van Sebroeck if (!(new_status & WDC_SR_TGOOD)) 2599b901ee0cb007eb4e2ee056e5b1c5c2837d53bdbWim Van Sebroeck *status |= WDIOF_OVERHEAT; 2609b901ee0cb007eb4e2ee056e5b1c5c2837d53bdbWim Van Sebroeck if (!(new_status & WDC_SR_PSUOVER)) 2619b901ee0cb007eb4e2ee056e5b1c5c2837d53bdbWim Van Sebroeck *status |= WDIOF_POWEROVER; 2629b901ee0cb007eb4e2ee056e5b1c5c2837d53bdbWim Van Sebroeck if (!(new_status & WDC_SR_PSUUNDR)) 2639b901ee0cb007eb4e2ee056e5b1c5c2837d53bdbWim Van Sebroeck *status |= WDIOF_POWERUNDER; 2649b901ee0cb007eb4e2ee056e5b1c5c2837d53bdbWim Van Sebroeck if (tachometer) { 2659b901ee0cb007eb4e2ee056e5b1c5c2837d53bdbWim Van Sebroeck if (!(new_status & WDC_SR_FANGOOD)) 2669b901ee0cb007eb4e2ee056e5b1c5c2837d53bdbWim Van Sebroeck *status |= WDIOF_FANFAULT; 2679b901ee0cb007eb4e2ee056e5b1c5c2837d53bdbWim Van Sebroeck } 2681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 2701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 2731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * wdtpci_get_temperature: 2741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Reports the temperature in degrees Fahrenheit. The API is in 2761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * farenheit. It was designed by an imperial measurement luddite. 2771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int wdtpci_get_temperature(int *temperature) 2801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2819f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox unsigned short c; 2829f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox unsigned long flags; 2839f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox spin_lock_irqsave(&wdtpci_lock, flags); 2849f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox c = inb(WDT_RT); 2859f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox udelay(8); 2869f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox spin_unlock_irqrestore(&wdtpci_lock, flags); 2871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *temperature = (c * 11 / 15) + 7; 2881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 2891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 2921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * wdtpci_interrupt: 2931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @irq: Interrupt number 2941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @dev_id: Unused as we don't allow multiple devices. 2951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Handle an interrupt from the board. These are raised when the status 2971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * map changes in what the board considers an interesting way. That means 2981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * a failure condition occurring. 2991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 3001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3017d12e780e003f93433d49ce78cfedf4b4c52adc5David Howellsstatic irqreturn_t wdtpci_interrupt(int irq, void *dev_id) 3021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 3041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Read the status register see what is up and 3051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * then printk it. 3061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 3079f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox unsigned char status; 3089f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox 3099f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox spin_lock(&wdtpci_lock); 3109f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox 3119f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox status = inb(WDT_SR); 3129f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox udelay(8); 3131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 31427c766aaacb265d625dc634bf7903f7f9fd0c697Joe Perches pr_crit("status %d\n", status); 3151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3169b901ee0cb007eb4e2ee056e5b1c5c2837d53bdbWim Van Sebroeck if (type == 501) { 3179b901ee0cb007eb4e2ee056e5b1c5c2837d53bdbWim Van Sebroeck if (!(status & WDC_SR_TGOOD)) { 31827c766aaacb265d625dc634bf7903f7f9fd0c697Joe Perches pr_crit("Overheat alarm (%d)\n", inb(WDT_RT)); 3199b901ee0cb007eb4e2ee056e5b1c5c2837d53bdbWim Van Sebroeck udelay(8); 3209b901ee0cb007eb4e2ee056e5b1c5c2837d53bdbWim Van Sebroeck } 3219b901ee0cb007eb4e2ee056e5b1c5c2837d53bdbWim Van Sebroeck if (!(status & WDC_SR_PSUOVER)) 32227c766aaacb265d625dc634bf7903f7f9fd0c697Joe Perches pr_crit("PSU over voltage\n"); 3239b901ee0cb007eb4e2ee056e5b1c5c2837d53bdbWim Van Sebroeck if (!(status & WDC_SR_PSUUNDR)) 32427c766aaacb265d625dc634bf7903f7f9fd0c697Joe Perches pr_crit("PSU under voltage\n"); 3259b901ee0cb007eb4e2ee056e5b1c5c2837d53bdbWim Van Sebroeck if (tachometer) { 3269b901ee0cb007eb4e2ee056e5b1c5c2837d53bdbWim Van Sebroeck if (!(status & WDC_SR_FANGOOD)) 32727c766aaacb265d625dc634bf7903f7f9fd0c697Joe Perches pr_crit("Possible fan fault\n"); 3289b901ee0cb007eb4e2ee056e5b1c5c2837d53bdbWim Van Sebroeck } 3291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3309b901ee0cb007eb4e2ee056e5b1c5c2837d53bdbWim Van Sebroeck if (!(status & WDC_SR_WCCR)) { 3311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef SOFTWARE_REBOOT 3321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef ONLY_TESTING 33327c766aaacb265d625dc634bf7903f7f9fd0c697Joe Perches pr_crit("Would Reboot\n"); 3341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#else 33527c766aaacb265d625dc634bf7903f7f9fd0c697Joe Perches pr_crit("Initiating system reboot\n"); 336f82567e55fcd25bb7addf2cfd8b79f36f409dc2eEric W. Biederman emergency_restart(NULL); 3371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 3381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#else 33927c766aaacb265d625dc634bf7903f7f9fd0c697Joe Perches pr_crit("Reset in 5ms\n"); 3401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 34159338d4cb68528062f294d95f116357265936076Ilpo Jarvinen } 3429f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox spin_unlock(&wdtpci_lock); 3431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return IRQ_HANDLED; 3441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 3481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * wdtpci_write: 3491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @file: file handle to the watchdog 3501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @buf: buffer to write (unused as data does not matter here 3511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @count: count of bytes 3521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @ppos: pointer to the position to write. No seeks allowed 3531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 3541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * A write to a watchdog device is defined as a keepalive signal. Any 3551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * write of data will do, as we we don't define content meaning. 3561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 3571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3589f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Coxstatic ssize_t wdtpci_write(struct file *file, const char __user *buf, 3599b901ee0cb007eb4e2ee056e5b1c5c2837d53bdbWim Van Sebroeck size_t count, loff_t *ppos) 3601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (count) { 3621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!nowayout) { 3631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds size_t i; 3641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3659b901ee0cb007eb4e2ee056e5b1c5c2837d53bdbWim Van Sebroeck /* In case it was set long ago */ 3661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds expect_close = 0; 3671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i != count; i++) { 3691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char c; 3707944d3a5a70ee5c1904ed1e8b1d71ff0af2854d9Wim Van Sebroeck if (get_user(c, buf + i)) 3711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EFAULT; 3721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (c == 'V') 3731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds expect_close = 42; 3741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wdtpci_ping(); 3771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return count; 3791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 3821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * wdtpci_ioctl: 3831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @file: file handle to the device 3841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @cmd: watchdog command 3851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @arg: argument pointer 3861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 3871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The watchdog API defines a common set of functions for all watchdogs 3881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * according to their available features. We only actually usefully support 3891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * querying capabilities and current status. 3901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 3911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3929f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Coxstatic long wdtpci_ioctl(struct file *file, unsigned int cmd, 3939f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox unsigned long arg) 3941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds void __user *argp = (void __user *)arg; 3961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int __user *p = argp; 3979b901ee0cb007eb4e2ee056e5b1c5c2837d53bdbWim Van Sebroeck int new_heartbeat; 3989b901ee0cb007eb4e2ee056e5b1c5c2837d53bdbWim Van Sebroeck int status; 3991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 400c1bf3acffcddcf794e3d8a1d25fb8bd4d5912383Andrew Morton struct watchdog_info ident = { 4011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .options = WDIOF_SETTIMEOUT| 4021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds WDIOF_MAGICCLOSE| 4031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds WDIOF_KEEPALIVEPING, 4041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .firmware_version = 1, 4051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .identity = "PCI-WDT500/501", 4061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds }; 4071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Add options according to the card we have */ 4091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ident.options |= (WDIOF_EXTERN1|WDIOF_EXTERN2); 4109b901ee0cb007eb4e2ee056e5b1c5c2837d53bdbWim Van Sebroeck if (type == 501) { 4119b901ee0cb007eb4e2ee056e5b1c5c2837d53bdbWim Van Sebroeck ident.options |= (WDIOF_OVERHEAT|WDIOF_POWERUNDER| 4129b901ee0cb007eb4e2ee056e5b1c5c2837d53bdbWim Van Sebroeck WDIOF_POWEROVER); 4139b901ee0cb007eb4e2ee056e5b1c5c2837d53bdbWim Van Sebroeck if (tachometer) 4149b901ee0cb007eb4e2ee056e5b1c5c2837d53bdbWim Van Sebroeck ident.options |= WDIOF_FANFAULT; 4159b901ee0cb007eb4e2ee056e5b1c5c2837d53bdbWim Van Sebroeck } 4161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4179f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox switch (cmd) { 4189f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox case WDIOC_GETSUPPORT: 4199f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox return copy_to_user(argp, &ident, sizeof(ident)) ? -EFAULT : 0; 4209f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox case WDIOC_GETSTATUS: 4219f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox wdtpci_get_status(&status); 4229f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox return put_user(status, p); 4239f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox case WDIOC_GETBOOTSTATUS: 4249f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox return put_user(0, p); 4259f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox case WDIOC_KEEPALIVE: 4269f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox wdtpci_ping(); 4279f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox return 0; 4289f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox case WDIOC_SETTIMEOUT: 4299f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox if (get_user(new_heartbeat, p)) 4309f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox return -EFAULT; 4319f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox if (wdtpci_set_heartbeat(new_heartbeat)) 4329f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox return -EINVAL; 4339f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox wdtpci_ping(); 4349f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox /* Fall */ 4359f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox case WDIOC_GETTIMEOUT: 4369f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox return put_user(heartbeat, p); 4370c06090c9472db0525cb6fe229c3bea33bbbbb3cWim Van Sebroeck default: 4380c06090c9472db0525cb6fe229c3bea33bbbbb3cWim Van Sebroeck return -ENOTTY; 4390c06090c9472db0525cb6fe229c3bea33bbbbb3cWim Van Sebroeck } 4401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 4431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * wdtpci_open: 4441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @inode: inode of device 4451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @file: file handle to device 4461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 4471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The watchdog device has been opened. The watchdog device is single 4481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * open and on opening we load the counters. Counter zero is a 100Hz 4491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * cascade, into counter 1 which downcounts to reboot. When the counter 4501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * triggers counter 2 downcounts the length of the reset pulse which 4511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * set set to be as long as possible. 4521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 4531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int wdtpci_open(struct inode *inode, struct file *file) 4551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4569f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox if (test_and_set_bit(0, &open_lock)) 4571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EBUSY; 4581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4599f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox if (nowayout) 4601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __module_get(THIS_MODULE); 4611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 4621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Activate 4631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 4641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wdtpci_start(); 4651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return nonseekable_open(inode, file); 4661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 4691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * wdtpci_release: 4701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @inode: inode to board 4711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @file: file handle to board 4721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 4731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The watchdog has a configurable API. There is a religious dispute 4741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * between people who want their watchdog to be able to shut down and 4751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * those who want to be sure if the watchdog manager dies the machine 4761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * reboots. In the former case we disable the counters, in the latter 4771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * case you have to open it again very soon. 4781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 4791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int wdtpci_release(struct inode *inode, struct file *file) 4811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (expect_close == 42) { 4831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wdtpci_stop(); 4841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 48527c766aaacb265d625dc634bf7903f7f9fd0c697Joe Perches pr_crit("Unexpected close, not stopping timer!\n"); 4861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wdtpci_ping(); 4871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds expect_close = 0; 4899f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox clear_bit(0, &open_lock); 4901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 4911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 4941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * wdtpci_temp_read: 4951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @file: file handle to the watchdog board 4961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @buf: buffer to write 1 byte into 4971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @count: length of buffer 4981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @ptr: offset (no seek allowed) 4991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 5001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Read reports the temperature in degrees Fahrenheit. The API is in 5011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * fahrenheit. It was designed by an imperial measurement luddite. 5021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 5031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5049f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Coxstatic ssize_t wdtpci_temp_read(struct file *file, char __user *buf, 5059f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox size_t count, loff_t *ptr) 5061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int temperature; 5081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (wdtpci_get_temperature(&temperature)) 5101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EFAULT; 5111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5129f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox if (copy_to_user(buf, &temperature, 1)) 5131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EFAULT; 5141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 1; 5161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 5191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * wdtpci_temp_open: 5201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @inode: inode of device 5211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @file: file handle to device 5221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 5231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The temperature device has been opened. 5241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 5251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int wdtpci_temp_open(struct inode *inode, struct file *file) 5271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return nonseekable_open(inode, file); 5291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 5321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * wdtpci_temp_release: 5331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @inode: inode to board 5341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @file: file handle to board 5351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 5361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The temperature device has been closed. 5371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 5381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int wdtpci_temp_release(struct inode *inode, struct file *file) 5401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 5421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 5451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * notify_sys: 5461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @this: our notifier block 5471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @code: the event being reported 5481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @unused: unused 5491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 5501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Our notifier is called on system shutdowns. We want to turn the card 5511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * off at reboot otherwise the machine will reboot again during memory 5521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * test or worse yet during the following fsck. This would suck, in fact 5531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * trust me - if it happens it does suck. 5541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 5551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int wdtpci_notify_sys(struct notifier_block *this, unsigned long code, 5579f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox void *unused) 5581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5599f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox if (code == SYS_DOWN || code == SYS_HALT) 5601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wdtpci_stop(); 5611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NOTIFY_DONE; 5621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 5651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Kernel Interfaces 5661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 5671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 56962322d2554d2f9680c8ace7bbf1f97d8fa84ad1aArjan van de Venstatic const struct file_operations wdtpci_fops = { 5701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .owner = THIS_MODULE, 5711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .llseek = no_llseek, 5721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .write = wdtpci_write, 5739f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox .unlocked_ioctl = wdtpci_ioctl, 5741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .open = wdtpci_open, 5751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .release = wdtpci_release, 5761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 5771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct miscdevice wdtpci_miscdev = { 5791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .minor = WATCHDOG_MINOR, 5801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .name = "watchdog", 5811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .fops = &wdtpci_fops, 5821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 5831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 58462322d2554d2f9680c8ace7bbf1f97d8fa84ad1aArjan van de Venstatic const struct file_operations wdtpci_temp_fops = { 5851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .owner = THIS_MODULE, 5861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .llseek = no_llseek, 5871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .read = wdtpci_temp_read, 5881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .open = wdtpci_temp_open, 5891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .release = wdtpci_temp_release, 5901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 5911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct miscdevice temp_miscdev = { 5931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .minor = TEMP_MINOR, 5941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .name = "temperature", 5951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .fops = &wdtpci_temp_fops, 5961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 5971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 5991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The WDT card needs to learn about soft shutdowns in order to 6001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * turn the timebomb registers off. 6011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 6021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct notifier_block wdtpci_notifier = { 6041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .notifier_call = wdtpci_notify_sys, 6051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 6061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6089f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Coxstatic int __devinit wdtpci_init_one(struct pci_dev *dev, 6099f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox const struct pci_device_id *ent) 6101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int ret = -EIO; 6121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_count++; 6141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (dev_count > 1) { 61527c766aaacb265d625dc634bf7903f7f9fd0c697Joe Perches pr_err("This driver only supports one device\n"); 6161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENODEV; 6171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6199b901ee0cb007eb4e2ee056e5b1c5c2837d53bdbWim Van Sebroeck if (type != 500 && type != 501) { 62027c766aaacb265d625dc634bf7903f7f9fd0c697Joe Perches pr_err("unknown card type '%d'\n", type); 6219b901ee0cb007eb4e2ee056e5b1c5c2837d53bdbWim Van Sebroeck return -ENODEV; 6229b901ee0cb007eb4e2ee056e5b1c5c2837d53bdbWim Van Sebroeck } 6239b901ee0cb007eb4e2ee056e5b1c5c2837d53bdbWim Van Sebroeck 6249f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox if (pci_enable_device(dev)) { 62527c766aaacb265d625dc634bf7903f7f9fd0c697Joe Perches pr_err("Not possible to enable PCI Device\n"); 6261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENODEV; 6271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6299f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox if (pci_resource_start(dev, 2) == 0x0000) { 63027c766aaacb265d625dc634bf7903f7f9fd0c697Joe Perches pr_err("No I/O-Address for card detected\n"); 6311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = -ENODEV; 6321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out_pci; 6331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 635119d3e56e7c82a73d27b5dd010c52dab1bc9f846Wim Van Sebroeck if (pci_request_region(dev, 2, "wdt_pci")) { 63627c766aaacb265d625dc634bf7903f7f9fd0c697Joe Perches pr_err("I/O address 0x%llx already in use\n", 63727c766aaacb265d625dc634bf7903f7f9fd0c697Joe Perches (unsigned long long)pci_resource_start(dev, 2)); 6381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out_pci; 6391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 641119d3e56e7c82a73d27b5dd010c52dab1bc9f846Wim Van Sebroeck irq = dev->irq; 642119d3e56e7c82a73d27b5dd010c52dab1bc9f846Wim Van Sebroeck io = pci_resource_start(dev, 2); 643119d3e56e7c82a73d27b5dd010c52dab1bc9f846Wim Van Sebroeck 64486b5912880453532440358b1486410ad49ef7672Yong Zhang if (request_irq(irq, wdtpci_interrupt, IRQF_SHARED, 6451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "wdt_pci", &wdtpci_miscdev)) { 64627c766aaacb265d625dc634bf7903f7f9fd0c697Joe Perches pr_err("IRQ %d is not free\n", irq); 6471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out_reg; 6481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 65027c766aaacb265d625dc634bf7903f7f9fd0c697Joe Perches pr_info("PCI-WDT500/501 (PCI-WDG-CSM) driver 0.10 at 0x%llx (Interrupt %d)\n", 65127c766aaacb265d625dc634bf7903f7f9fd0c697Joe Perches (unsigned long long)io, irq); 6521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6539f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox /* Check that the heartbeat value is within its range; 6549f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox if not reset to the default */ 6551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (wdtpci_set_heartbeat(heartbeat)) { 6561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wdtpci_set_heartbeat(WD_TIMO); 65727c766aaacb265d625dc634bf7903f7f9fd0c697Joe Perches pr_info("heartbeat value must be 0 < heartbeat < 65536, using %d\n", 65827c766aaacb265d625dc634bf7903f7f9fd0c697Joe Perches WD_TIMO); 6591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6619f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox ret = register_reboot_notifier(&wdtpci_notifier); 6621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ret) { 66327c766aaacb265d625dc634bf7903f7f9fd0c697Joe Perches pr_err("cannot register reboot notifier (err=%d)\n", ret); 6641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out_irq; 6651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6679b901ee0cb007eb4e2ee056e5b1c5c2837d53bdbWim Van Sebroeck if (type == 501) { 6689b901ee0cb007eb4e2ee056e5b1c5c2837d53bdbWim Van Sebroeck ret = misc_register(&temp_miscdev); 6699b901ee0cb007eb4e2ee056e5b1c5c2837d53bdbWim Van Sebroeck if (ret) { 67027c766aaacb265d625dc634bf7903f7f9fd0c697Joe Perches pr_err("cannot register miscdev on minor=%d (err=%d)\n", 67127c766aaacb265d625dc634bf7903f7f9fd0c697Joe Perches TEMP_MINOR, ret); 6729b901ee0cb007eb4e2ee056e5b1c5c2837d53bdbWim Van Sebroeck goto out_rbt; 6739b901ee0cb007eb4e2ee056e5b1c5c2837d53bdbWim Van Sebroeck } 6741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6769f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox ret = misc_register(&wdtpci_miscdev); 6771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ret) { 67827c766aaacb265d625dc634bf7903f7f9fd0c697Joe Perches pr_err("cannot register miscdev on minor=%d (err=%d)\n", 67927c766aaacb265d625dc634bf7903f7f9fd0c697Joe Perches WATCHDOG_MINOR, ret); 6801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out_misc; 6811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 68327c766aaacb265d625dc634bf7903f7f9fd0c697Joe Perches pr_info("initialized. heartbeat=%d sec (nowayout=%d)\n", 6841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds heartbeat, nowayout); 6859b901ee0cb007eb4e2ee056e5b1c5c2837d53bdbWim Van Sebroeck if (type == 501) 68627c766aaacb265d625dc634bf7903f7f9fd0c697Joe Perches pr_info("Fan Tachometer is %s\n", 68727c766aaacb265d625dc634bf7903f7f9fd0c697Joe Perches tachometer ? "Enabled" : "Disabled"); 6881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ret = 0; 6901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout: 6911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ret; 6921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout_misc: 6949b901ee0cb007eb4e2ee056e5b1c5c2837d53bdbWim Van Sebroeck if (type == 501) 6959b901ee0cb007eb4e2ee056e5b1c5c2837d53bdbWim Van Sebroeck misc_deregister(&temp_miscdev); 6961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout_rbt: 6971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unregister_reboot_notifier(&wdtpci_notifier); 6981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout_irq: 6991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds free_irq(irq, &wdtpci_miscdev); 7001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout_reg: 701119d3e56e7c82a73d27b5dd010c52dab1bc9f846Wim Van Sebroeck pci_release_region(dev, 2); 7021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout_pci: 7031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_disable_device(dev); 7041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 7051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7089f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Coxstatic void __devexit wdtpci_remove_one(struct pci_dev *pdev) 7091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* here we assume only one device will ever have 7111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * been picked up and registered by probe function */ 7121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds misc_deregister(&wdtpci_miscdev); 7139b901ee0cb007eb4e2ee056e5b1c5c2837d53bdbWim Van Sebroeck if (type == 501) 7149b901ee0cb007eb4e2ee056e5b1c5c2837d53bdbWim Van Sebroeck misc_deregister(&temp_miscdev); 7151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unregister_reboot_notifier(&wdtpci_notifier); 7161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds free_irq(irq, &wdtpci_miscdev); 717119d3e56e7c82a73d27b5dd010c52dab1bc9f846Wim Van Sebroeck pci_release_region(pdev, 2); 7181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_disable_device(pdev); 7191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_count--; 7201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7234562f53940432369df88e195ef8f9b642bdf7cd6Wim Van Sebroeckstatic DEFINE_PCI_DEVICE_TABLE(wdtpci_pci_tbl) = { 7241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { 7251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .vendor = PCI_VENDOR_ID_ACCESSIO, 7269f2cc6f759ca0b072107c171a3b5cd79c7ea5de3H Hartley Sweeten .device = PCI_DEVICE_ID_ACCESSIO_WDG_CSM, 7271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .subvendor = PCI_ANY_ID, 7281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .subdevice = PCI_ANY_ID, 7291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds }, 7301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { 0, }, /* terminate list */ 7311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 7321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_DEVICE_TABLE(pci, wdtpci_pci_tbl); 7331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct pci_driver wdtpci_driver = { 7361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .name = "wdt_pci", 7371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .id_table = wdtpci_pci_tbl, 7381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .probe = wdtpci_init_one, 7391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .remove = __devexit_p(wdtpci_remove_one), 7401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 7411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 7441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * wdtpci_cleanup: 7451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 7461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Unload the watchdog. You cannot do this with any file handles open. 7471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If your watchdog is set to continue ticking on close and you unload 7481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * it, well it keeps ticking. We won't get the interrupt but the board 7491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * will not touch PC memory so all is fine. You just have to load a new 7501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * module in xx seconds or reboot. 7511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 7521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void __exit wdtpci_cleanup(void) 7541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7559f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox pci_unregister_driver(&wdtpci_driver); 7561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 7605f3b27569fc0286a51f8d0655c7fb4f5b36aea65Wim Van Sebroeck * wdtpci_init: 7611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 7621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Set up the WDT watchdog board. All we have to do is grab the 7631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * resources we require and bitch if anyone beat us to them. 7641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The open() function will actually kick the board off. 7651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 7661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int __init wdtpci_init(void) 7681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7699f2d1f0da766f84fdb96c9bd79ed0f97036635cbAlan Cox return pci_register_driver(&wdtpci_driver); 7701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_init(wdtpci_init); 7741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_exit(wdtpci_cleanup); 7751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_AUTHOR("JP Nollmann, Alan Cox"); 7771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_DESCRIPTION("Driver for the ICS PCI-WDT500/501 watchdog cards"); 7781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_LICENSE("GPL"); 7791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_ALIAS_MISCDEV(WATCHDOG_MINOR); 7801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_ALIAS_MISCDEV(TEMP_MINOR); 781