diff options
Diffstat (limited to 'target/linux/atheros/files-2.6.28/drivers/watchdog/ar2315-wtd.c')
| -rw-r--r-- | target/linux/atheros/files-2.6.28/drivers/watchdog/ar2315-wtd.c | 198 |
1 files changed, 0 insertions, 198 deletions
diff --git a/target/linux/atheros/files-2.6.28/drivers/watchdog/ar2315-wtd.c b/target/linux/atheros/files-2.6.28/drivers/watchdog/ar2315-wtd.c deleted file mode 100644 index d71b6f684..000000000 --- a/target/linux/atheros/files-2.6.28/drivers/watchdog/ar2315-wtd.c +++ /dev/null @@ -1,198 +0,0 @@ -/* - * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * - * Copyright (C) 2008 John Crispin <blogic@openwrt.org> - * Based on EP93xx and ifxmips wdt driver - */ - -#include <linux/interrupt.h> -#include <linux/module.h> -#include <linux/moduleparam.h> -#include <linux/types.h> -#include <linux/miscdevice.h> -#include <linux/watchdog.h> -#include <linux/fs.h> -#include <linux/ioport.h> -#include <linux/notifier.h> -#include <linux/reboot.h> -#include <linux/init.h> -#include <linux/platform_device.h> - -#include <asm/io.h> -#include <asm/uaccess.h> -#include <asm/system.h> -#include <asm/addrspace.h> -#include <ar531x.h> - -#define CLOCK_RATE 40000000 -#define HEARTBEAT(x) (x < 1 || x > 90)?(20):(x) - -static int wdt_timeout = 20; -static int started = 0; -static int in_use = 0; - -static void -ar2315_wdt_enable(void) -{ - sysRegWrite(AR5315_WD, wdt_timeout * CLOCK_RATE); - sysRegWrite(AR5315_ISR, 0x80); -} - -static ssize_t -ar2315_wdt_write(struct file *file, const char __user *data, size_t len, loff_t *ppos) -{ - if(len) - ar2315_wdt_enable(); - return len; -} - -static int -ar2315_wdt_open(struct inode *inode, struct file *file) -{ - if(in_use) - return -EBUSY; - ar2315_wdt_enable(); - in_use = started = 1; - return nonseekable_open(inode, file); -} - -static int -ar2315_wdt_release(struct inode *inode, struct file *file) -{ - in_use = 0; - return 0; -} - -static irqreturn_t -ar2315_wdt_interrupt(int irq, void *dev_id) -{ - if(started) - { - printk(KERN_CRIT "watchdog expired, rebooting system\n"); - emergency_restart(); - } else { - sysRegWrite(AR5315_WDC, 0); - sysRegWrite(AR5315_WD, 0); - sysRegWrite(AR5315_ISR, 0x80); - } - return IRQ_HANDLED; -} - -static struct watchdog_info ident = { - .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING, - .identity = "ar2315 Watchdog", -}; - -static int -ar2315_wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) -{ - int new_wdt_timeout; - int ret = -ENOIOCTLCMD; - - switch(cmd) - { - case WDIOC_GETSUPPORT: - ret = copy_to_user((struct watchdog_info __user *)arg, &ident, sizeof(ident)) ? -EFAULT : 0; - break; - - case WDIOC_KEEPALIVE: - ar2315_wdt_enable(); - ret = 0; - break; - - case WDIOC_SETTIMEOUT: - if((ret = get_user(new_wdt_timeout, (int __user *)arg))) - break; - wdt_timeout = HEARTBEAT(new_wdt_timeout); - ar2315_wdt_enable(); - break; - - case WDIOC_GETTIMEOUT: - ret = put_user(wdt_timeout, (int __user *)arg); - break; - } - return ret; -} - -static struct file_operations ar2315_wdt_fops = { - .owner = THIS_MODULE, - .llseek = no_llseek, - .write = ar2315_wdt_write, - .ioctl = ar2315_wdt_ioctl, - .open = ar2315_wdt_open, - .release = ar2315_wdt_release, -}; - -static struct miscdevice ar2315_wdt_miscdev = { - .minor = WATCHDOG_MINOR, - .name = "watchdog", - .fops = &ar2315_wdt_fops, -}; - -static int -ar2315_wdt_probe(struct platform_device *dev) -{ - int ret = 0; - - ar2315_wdt_enable(); - ret = request_irq(AR531X_MISC_IRQ_WATCHDOG, ar2315_wdt_interrupt, IRQF_DISABLED, "ar2315_wdt", NULL); - if(ret) - { - printk(KERN_ERR "ar2315wdt: failed to register inetrrupt\n"); - goto out; - } - - ret = misc_register(&ar2315_wdt_miscdev); - if(ret) - printk(KERN_ERR "ar2315wdt: failed to register miscdev\n"); - -out: - return ret; -} - -static int -ar2315_wdt_remove(struct platform_device *dev) -{ - misc_deregister(&ar2315_wdt_miscdev); - free_irq(AR531X_MISC_IRQ_WATCHDOG, NULL); - return 0; -} - -static struct platform_driver ar2315_wdt_driver = { - .probe = ar2315_wdt_probe, - .remove = ar2315_wdt_remove, - .driver = { - .name = "ar2315_wdt", - .owner = THIS_MODULE, - }, -}; - -static int __init -init_ar2315_wdt(void) -{ - int ret = platform_driver_register(&ar2315_wdt_driver); - if(ret) - printk(KERN_INFO "ar2315_wdt: error registering platfom driver!"); - return ret; -} - -static void __exit -exit_ar2315_wdt(void) -{ - platform_driver_unregister(&ar2315_wdt_driver); -} - -module_init(init_ar2315_wdt); -module_exit(exit_ar2315_wdt); |