diff options
Diffstat (limited to 'drivers/char/watchdog/indydog.c')
| -rw-r--r-- | drivers/char/watchdog/indydog.c | 215 |
1 files changed, 0 insertions, 215 deletions
diff --git a/drivers/char/watchdog/indydog.c b/drivers/char/watchdog/indydog.c deleted file mode 100644 index 788245bdaa7..00000000000 --- a/drivers/char/watchdog/indydog.c +++ /dev/null @@ -1,215 +0,0 @@ -/* - * IndyDog 0.3 A Hardware Watchdog Device for SGI IP22 - * - * (c) Copyright 2002 Guido Guenther <agx@sigxcpu.org>, All Rights Reserved. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * - * based on softdog.c by Alan Cox <alan@redhat.com> - */ - -#include <linux/module.h> -#include <linux/moduleparam.h> -#include <linux/types.h> -#include <linux/kernel.h> -#include <linux/fs.h> -#include <linux/mm.h> -#include <linux/miscdevice.h> -#include <linux/watchdog.h> -#include <linux/notifier.h> -#include <linux/reboot.h> -#include <linux/init.h> -#include <asm/uaccess.h> -#include <asm/sgi/mc.h> - -#define PFX "indydog: " -static int indydog_alive; - -#define WATCHDOG_TIMEOUT 30 /* 30 sec default timeout */ - -static int nowayout = WATCHDOG_NOWAYOUT; -module_param(nowayout, int, 0); -MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); - -static void indydog_start(void) -{ - u32 mc_ctrl0 = sgimc->cpuctrl0; - - mc_ctrl0 = sgimc->cpuctrl0 | SGIMC_CCTRL0_WDOG; - sgimc->cpuctrl0 = mc_ctrl0; -} - -static void indydog_stop(void) -{ - u32 mc_ctrl0 = sgimc->cpuctrl0; - - mc_ctrl0 &= ~SGIMC_CCTRL0_WDOG; - sgimc->cpuctrl0 = mc_ctrl0; - - printk(KERN_INFO PFX "Stopped watchdog timer.\n"); -} - -static void indydog_ping(void) -{ - sgimc->watchdogt = 0; -} - -/* - * Allow only one person to hold it open - */ -static int indydog_open(struct inode *inode, struct file *file) -{ - if (indydog_alive) - return -EBUSY; - - if (nowayout) - __module_get(THIS_MODULE); - - /* Activate timer */ - indydog_start(); - indydog_ping(); - - indydog_alive = 1; - printk(KERN_INFO "Started watchdog timer.\n"); - - return nonseekable_open(inode, file); -} - -static int indydog_release(struct inode *inode, struct file *file) -{ - /* Shut off the timer. - * Lock it in if it's a module and we defined ...NOWAYOUT */ - if (!nowayout) - indydog_stop(); /* Turn the WDT off */ - - indydog_alive = 0; - - return 0; -} - -static ssize_t indydog_write(struct file *file, const char *data, size_t len, loff_t *ppos) -{ - /* Refresh the timer. */ - if (len) { - indydog_ping(); - } - return len; -} - -static int indydog_ioctl(struct inode *inode, struct file *file, - unsigned int cmd, unsigned long arg) -{ - int options, retval = -EINVAL; - static struct watchdog_info ident = { - .options = WDIOF_KEEPALIVEPING | - WDIOF_MAGICCLOSE, - .firmware_version = 0, - .identity = "Hardware Watchdog for SGI IP22", - }; - - switch (cmd) { - default: - return -ENOTTY; - case WDIOC_GETSUPPORT: - if (copy_to_user((struct watchdog_info *)arg, - &ident, sizeof(ident))) - return -EFAULT; - return 0; - case WDIOC_GETSTATUS: - case WDIOC_GETBOOTSTATUS: - return put_user(0,(int *)arg); - case WDIOC_KEEPALIVE: - indydog_ping(); - return 0; - case WDIOC_GETTIMEOUT: - return put_user(WATCHDOG_TIMEOUT,(int *)arg); - case WDIOC_SETOPTIONS: - { - if (get_user(options, (int *)arg)) - return -EFAULT; - - if (options & WDIOS_DISABLECARD) { - indydog_stop(); - retval = 0; - } - - if (options & WDIOS_ENABLECARD) { - indydog_start(); - retval = 0; - } - - return retval; - } - } -} - -static int indydog_notify_sys(struct notifier_block *this, unsigned long code, void *unused) -{ - if (code == SYS_DOWN || code == SYS_HALT) - indydog_stop(); /* Turn the WDT off */ - - return NOTIFY_DONE; -} - -static const struct file_operations indydog_fops = { - .owner = THIS_MODULE, - .llseek = no_llseek, - .write = indydog_write, - .ioctl = indydog_ioctl, - .open = indydog_open, - .release = indydog_release, -}; - -static struct miscdevice indydog_miscdev = { - .minor = WATCHDOG_MINOR, - .name = "watchdog", - .fops = &indydog_fops, -}; - -static struct notifier_block indydog_notifier = { - .notifier_call = indydog_notify_sys, -}; - -static char banner[] __initdata = - KERN_INFO PFX "Hardware Watchdog Timer for SGI IP22: 0.3\n"; - -static int __init watchdog_init(void) -{ - int ret; - - ret = register_reboot_notifier(&indydog_notifier); - if (ret) { - printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n", - ret); - return ret; - } - - ret = misc_register(&indydog_miscdev); - if (ret) { - printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n", - WATCHDOG_MINOR, ret); - unregister_reboot_notifier(&indydog_notifier); - return ret; - } - - printk(banner); - - return 0; -} - -static void __exit watchdog_exit(void) -{ - misc_deregister(&indydog_miscdev); - unregister_reboot_notifier(&indydog_notifier); -} - -module_init(watchdog_init); -module_exit(watchdog_exit); - -MODULE_AUTHOR("Guido Guenther <agx@sigxcpu.org>"); -MODULE_DESCRIPTION("Hardware Watchdog Device for SGI IP22"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR); |