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Diffstat (limited to 'drivers/char/watchdog/wdt285.c')
-rw-r--r--drivers/char/watchdog/wdt285.c229
1 files changed, 0 insertions, 229 deletions
diff --git a/drivers/char/watchdog/wdt285.c b/drivers/char/watchdog/wdt285.c
deleted file mode 100644
index e4cf661dc89..00000000000
--- a/drivers/char/watchdog/wdt285.c
+++ /dev/null
@@ -1,229 +0,0 @@
-/*
- * Intel 21285 watchdog driver
- * Copyright (c) Phil Blundell <pb@nexus.co.uk>, 1998
- *
- * based on
- *
- * SoftDog 0.05: A Software Watchdog Device
- *
- * (c) Copyright 1996 Alan Cox <alan@redhat.com>, 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.
- *
- */
-
-#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/reboot.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-
-#include <asm/irq.h>
-#include <asm/uaccess.h>
-#include <asm/hardware.h>
-#include <asm/mach-types.h>
-#include <asm/hardware/dec21285.h>
-
-/*
- * Define this to stop the watchdog actually rebooting the machine.
- */
-#undef ONLY_TESTING
-
-static unsigned int soft_margin = 60; /* in seconds */
-static unsigned int reload;
-static unsigned long timer_alive;
-
-#ifdef ONLY_TESTING
-/*
- * If the timer expires..
- */
-static void watchdog_fire(int irq, void *dev_id)
-{
- printk(KERN_CRIT "Watchdog: Would Reboot.\n");
- *CSR_TIMER4_CNTL = 0;
- *CSR_TIMER4_CLR = 0;
-}
-#endif
-
-/*
- * Refresh the timer.
- */
-static void watchdog_ping(void)
-{
- *CSR_TIMER4_LOAD = reload;
-}
-
-/*
- * Allow only one person to hold it open
- */
-static int watchdog_open(struct inode *inode, struct file *file)
-{
- int ret;
-
- if (*CSR_SA110_CNTL & (1 << 13))
- return -EBUSY;
-
- if (test_and_set_bit(1, &timer_alive))
- return -EBUSY;
-
- reload = soft_margin * (mem_fclk_21285 / 256);
-
- *CSR_TIMER4_CLR = 0;
- watchdog_ping();
- *CSR_TIMER4_CNTL = TIMER_CNTL_ENABLE | TIMER_CNTL_AUTORELOAD
- | TIMER_CNTL_DIV256;
-
-#ifdef ONLY_TESTING
- ret = request_irq(IRQ_TIMER4, watchdog_fire, 0, "watchdog", NULL);
- if (ret) {
- *CSR_TIMER4_CNTL = 0;
- clear_bit(1, &timer_alive);
- }
-#else
- /*
- * Setting this bit is irreversible; once enabled, there is
- * no way to disable the watchdog.
- */
- *CSR_SA110_CNTL |= 1 << 13;
-
- ret = 0;
-#endif
- nonseekable_open(inode, file);
- return ret;
-}
-
-/*
- * Shut off the timer.
- * Note: if we really have enabled the watchdog, there
- * is no way to turn off.
- */
-static int watchdog_release(struct inode *inode, struct file *file)
-{
-#ifdef ONLY_TESTING
- free_irq(IRQ_TIMER4, NULL);
- clear_bit(1, &timer_alive);
-#endif
- return 0;
-}
-
-static ssize_t
-watchdog_write(struct file *file, const char *data, size_t len, loff_t *ppos)
-{
- /*
- * Refresh the timer.
- */
- if (len)
- watchdog_ping();
-
- return len;
-}
-
-static struct watchdog_info ident = {
- .options = WDIOF_SETTIMEOUT,
- .identity = "Footbridge Watchdog",
-};
-
-static int
-watchdog_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
- unsigned long arg)
-{
- unsigned int new_margin;
- int ret = -ENOTTY;
-
- switch(cmd) {
- case WDIOC_GETSUPPORT:
- ret = 0;
- if (copy_to_user((void *)arg, &ident, sizeof(ident)))
- ret = -EFAULT;
- break;
-
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- ret = put_user(0,(int *)arg);
- break;
-
- case WDIOC_KEEPALIVE:
- watchdog_ping();
- ret = 0;
- break;
-
- case WDIOC_SETTIMEOUT:
- ret = get_user(new_margin, (int *)arg);
- if (ret)
- break;
-
- /* Arbitrary, can't find the card's limits */
- if (new_margin < 0 || new_margin > 60) {
- ret = -EINVAL;
- break;
- }
-
- soft_margin = new_margin;
- reload = soft_margin * (mem_fclk_21285 / 256);
- watchdog_ping();
- /* Fall */
- case WDIOC_GETTIMEOUT:
- ret = put_user(soft_margin, (int *)arg);
- break;
- }
- return ret;
-}
-
-static const struct file_operations watchdog_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = watchdog_write,
- .ioctl = watchdog_ioctl,
- .open = watchdog_open,
- .release = watchdog_release,
-};
-
-static struct miscdevice watchdog_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &watchdog_fops,
-};
-
-static int __init footbridge_watchdog_init(void)
-{
- int retval;
-
- if (machine_is_netwinder())
- return -ENODEV;
-
- retval = misc_register(&watchdog_miscdev);
- if (retval < 0)
- return retval;
-
- printk("Footbridge Watchdog Timer: 0.01, timer margin: %d sec\n",
- soft_margin);
-
- if (machine_is_cats())
- printk("Warning: Watchdog reset may not work on this machine.\n");
- return 0;
-}
-
-static void __exit footbridge_watchdog_exit(void)
-{
- misc_deregister(&watchdog_miscdev);
-}
-
-MODULE_AUTHOR("Phil Blundell <pb@nexus.co.uk>");
-MODULE_DESCRIPTION("Footbridge watchdog driver");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
-
-module_param(soft_margin, int, 0);
-MODULE_PARM_DESC(soft_margin,"Watchdog timeout in seconds");
-
-module_init(footbridge_watchdog_init);
-module_exit(footbridge_watchdog_exit);