diff options
Diffstat (limited to 'drivers/char/watchdog/cpu5wdt.c')
| -rw-r--r-- | drivers/char/watchdog/cpu5wdt.c | 304 |
1 files changed, 0 insertions, 304 deletions
diff --git a/drivers/char/watchdog/cpu5wdt.c b/drivers/char/watchdog/cpu5wdt.c deleted file mode 100644 index 5941ca601a3..00000000000 --- a/drivers/char/watchdog/cpu5wdt.c +++ /dev/null @@ -1,304 +0,0 @@ -/* - * sma cpu5 watchdog driver - * - * Copyright (C) 2003 Heiko Ronsdorf <hero@ihg.uni-duisburg.de> - * - * 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. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - * - */ - -#include <linux/module.h> -#include <linux/moduleparam.h> -#include <linux/types.h> -#include <linux/errno.h> -#include <linux/miscdevice.h> -#include <linux/fs.h> -#include <linux/init.h> -#include <linux/ioport.h> -#include <linux/timer.h> -#include <linux/completion.h> -#include <linux/jiffies.h> -#include <asm/io.h> -#include <asm/uaccess.h> - -#include <linux/watchdog.h> - -/* adjustable parameters */ - -static int verbose = 0; -static int port = 0x91; -static int ticks = 10000; - -#define PFX "cpu5wdt: " - -#define CPU5WDT_EXTENT 0x0A - -#define CPU5WDT_STATUS_REG 0x00 -#define CPU5WDT_TIME_A_REG 0x02 -#define CPU5WDT_TIME_B_REG 0x03 -#define CPU5WDT_MODE_REG 0x04 -#define CPU5WDT_TRIGGER_REG 0x07 -#define CPU5WDT_ENABLE_REG 0x08 -#define CPU5WDT_RESET_REG 0x09 - -#define CPU5WDT_INTERVAL (HZ/10+1) - -/* some device data */ - -static struct { - struct completion stop; - volatile int running; - struct timer_list timer; - volatile int queue; - int default_ticks; - unsigned long inuse; -} cpu5wdt_device; - -/* generic helper functions */ - -static void cpu5wdt_trigger(unsigned long unused) -{ - if ( verbose > 2 ) - printk(KERN_DEBUG PFX "trigger at %i ticks\n", ticks); - - if( cpu5wdt_device.running ) - ticks--; - - /* keep watchdog alive */ - outb(1, port + CPU5WDT_TRIGGER_REG); - - /* requeue?? */ - if (cpu5wdt_device.queue && ticks) - mod_timer(&cpu5wdt_device.timer, jiffies + CPU5WDT_INTERVAL); - else { - /* ticks doesn't matter anyway */ - complete(&cpu5wdt_device.stop); - } - -} - -static void cpu5wdt_reset(void) -{ - ticks = cpu5wdt_device.default_ticks; - - if ( verbose ) - printk(KERN_DEBUG PFX "reset (%i ticks)\n", (int) ticks); - -} - -static void cpu5wdt_start(void) -{ - if ( !cpu5wdt_device.queue ) { - cpu5wdt_device.queue = 1; - outb(0, port + CPU5WDT_TIME_A_REG); - outb(0, port + CPU5WDT_TIME_B_REG); - outb(1, port + CPU5WDT_MODE_REG); - outb(0, port + CPU5WDT_RESET_REG); - outb(0, port + CPU5WDT_ENABLE_REG); - mod_timer(&cpu5wdt_device.timer, jiffies + CPU5WDT_INTERVAL); - } - /* if process dies, counter is not decremented */ - cpu5wdt_device.running++; -} - -static int cpu5wdt_stop(void) -{ - if ( cpu5wdt_device.running ) - cpu5wdt_device.running = 0; - - ticks = cpu5wdt_device.default_ticks; - - if ( verbose ) - printk(KERN_CRIT PFX "stop not possible\n"); - - return -EIO; -} - -/* filesystem operations */ - -static int cpu5wdt_open(struct inode *inode, struct file *file) -{ - if ( test_and_set_bit(0, &cpu5wdt_device.inuse) ) - return -EBUSY; - - return nonseekable_open(inode, file); -} - -static int cpu5wdt_release(struct inode *inode, struct file *file) -{ - clear_bit(0, &cpu5wdt_device.inuse); - return 0; -} - -static int cpu5wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) -{ - void __user *argp = (void __user *)arg; - unsigned int value; - static struct watchdog_info ident = - { - .options = WDIOF_CARDRESET, - .identity = "CPU5 WDT", - }; - - switch(cmd) { - case WDIOC_KEEPALIVE: - cpu5wdt_reset(); - break; - case WDIOC_GETSTATUS: - value = inb(port + CPU5WDT_STATUS_REG); - value = (value >> 2) & 1; - if ( copy_to_user(argp, &value, sizeof(int)) ) - return -EFAULT; - break; - case WDIOC_GETBOOTSTATUS: - if ( copy_to_user(argp, &value, sizeof(int)) ) - return -EFAULT; - break; - case WDIOC_GETSUPPORT: - if ( copy_to_user(argp, &ident, sizeof(ident)) ) - return -EFAULT; - break; - case WDIOC_SETOPTIONS: - if ( copy_from_user(&value, argp, sizeof(int)) ) - return -EFAULT; - switch(value) { - case WDIOS_ENABLECARD: - cpu5wdt_start(); - break; - case WDIOS_DISABLECARD: - return cpu5wdt_stop(); - default: - return -EINVAL; - } - break; - default: - return -ENOTTY; - } - return 0; -} - -static ssize_t cpu5wdt_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) -{ - if ( !count ) - return -EIO; - - cpu5wdt_reset(); - - return count; -} - -static const struct file_operations cpu5wdt_fops = { - .owner = THIS_MODULE, - .llseek = no_llseek, - .ioctl = cpu5wdt_ioctl, - .open = cpu5wdt_open, - .write = cpu5wdt_write, - .release = cpu5wdt_release, -}; - -static struct miscdevice cpu5wdt_misc = { - .minor = WATCHDOG_MINOR, - .name = "watchdog", - .fops = &cpu5wdt_fops, -}; - -/* init/exit function */ - -static int __devinit cpu5wdt_init(void) -{ - unsigned int val; - int err; - - if ( verbose ) - printk(KERN_DEBUG PFX "port=0x%x, verbose=%i\n", port, verbose); - - if ( !request_region(port, CPU5WDT_EXTENT, PFX) ) { - printk(KERN_ERR PFX "request_region failed\n"); - err = -EBUSY; - goto no_port; - } - - if ( (err = misc_register(&cpu5wdt_misc)) < 0 ) { - printk(KERN_ERR PFX "misc_register failed\n"); - goto no_misc; - } - - /* watchdog reboot? */ - val = inb(port + CPU5WDT_STATUS_REG); - val = (val >> 2) & 1; - if ( !val ) - printk(KERN_INFO PFX "sorry, was my fault\n"); - - init_completion(&cpu5wdt_device.stop); - cpu5wdt_device.queue = 0; - - clear_bit(0, &cpu5wdt_device.inuse); - - setup_timer(&cpu5wdt_device.timer, cpu5wdt_trigger, 0); - - cpu5wdt_device.default_ticks = ticks; - - printk(KERN_INFO PFX "init success\n"); - - return 0; - -no_misc: - release_region(port, CPU5WDT_EXTENT); -no_port: - return err; -} - -static int __devinit cpu5wdt_init_module(void) -{ - return cpu5wdt_init(); -} - -static void __devexit cpu5wdt_exit(void) -{ - if ( cpu5wdt_device.queue ) { - cpu5wdt_device.queue = 0; - wait_for_completion(&cpu5wdt_device.stop); - } - - misc_deregister(&cpu5wdt_misc); - - release_region(port, CPU5WDT_EXTENT); - -} - -static void __devexit cpu5wdt_exit_module(void) -{ - cpu5wdt_exit(); -} - -/* module entry points */ - -module_init(cpu5wdt_init_module); -module_exit(cpu5wdt_exit_module); - -MODULE_AUTHOR("Heiko Ronsdorf <hero@ihg.uni-duisburg.de>"); -MODULE_DESCRIPTION("sma cpu5 watchdog driver"); -MODULE_SUPPORTED_DEVICE("sma cpu5 watchdog"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR); - -module_param(port, int, 0); -MODULE_PARM_DESC(port, "base address of watchdog card, default is 0x91"); - -module_param(verbose, int, 0); -MODULE_PARM_DESC(verbose, "be verbose, default is 0 (no)"); - -module_param(ticks, int, 0); -MODULE_PARM_DESC(ticks, "count down ticks, default is 10000"); |