diff options
Diffstat (limited to 'target/linux/ifxmips/files/drivers/watchdog/ifxmips_wdt.c')
| -rw-r--r-- | target/linux/ifxmips/files/drivers/watchdog/ifxmips_wdt.c | 195 |
1 files changed, 0 insertions, 195 deletions
diff --git a/target/linux/ifxmips/files/drivers/watchdog/ifxmips_wdt.c b/target/linux/ifxmips/files/drivers/watchdog/ifxmips_wdt.c deleted file mode 100644 index b06307cb76..0000000000 --- a/target/linux/ifxmips/files/drivers/watchdog/ifxmips_wdt.c +++ /dev/null @@ -1,195 +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 wdt driver - */ - -#include <linux/module.h> -#include <linux/fs.h> -#include <linux/miscdevice.h> -#include <linux/miscdevice.h> -#include <linux/watchdog.h> -#include <linux/platform_device.h> -#include <linux/uaccess.h> - -#include <ifxmips.h> -#include <ifxmips_cgu.h> - -#define IFXMIPS_WDT_PW1 0x00BE0000 -#define IFXMIPS_WDT_PW2 0x00DC0000 - -#ifndef CONFIG_WATCHDOG_NOWAYOUT -static int wdt_ok_to_close; -#endif - -static int wdt_timeout = 30; - -int ifxmips_wdt_enable(unsigned int timeout) -{ - u32 fpi; - fpi = cgu_get_io_region_clock(); - ifxmips_w32(IFXMIPS_WDT_PW1, IFXMIPS_BIU_WDT_CR); - ifxmips_w32(IFXMIPS_WDT_PW2 | - (0x3 << 26) | /* PWL */ - (0x3 << 24) | /* CLKDIV */ - (0x1 << 31) | /* enable */ - ((timeout * (fpi / 0x40000)) + 0x1000), /* reload */ - IFXMIPS_BIU_WDT_CR); - return 0; -} - -void ifxmips_wdt_disable(void) -{ -#ifndef CONFIG_WATCHDOG_NOWAYOUT - wdt_ok_to_close = 0; -#endif - ifxmips_w32(IFXMIPS_WDT_PW1, IFXMIPS_BIU_WDT_CR); - ifxmips_w32(IFXMIPS_WDT_PW2, IFXMIPS_BIU_WDT_CR); -} - -static ssize_t ifxmips_wdt_write(struct file *file, const char __user *data, - size_t len, loff_t *ppos) -{ - size_t i; - - if (!len) - return 0; - -#ifndef CONFIG_WATCHDOG_NOWAYOUT - for (i = 0; i != len; i++) { - char c; - if (get_user(c, data + i)) - return -EFAULT; - if (c == 'V') - wdt_ok_to_close = 1; - } -#endif - ifxmips_wdt_enable(wdt_timeout); - return len; -} - -static struct watchdog_info ident = { - .options = WDIOF_MAGICCLOSE, - .identity = "ifxmips Watchdog", -}; - -static int ifxmips_wdt_ioctl(struct inode *inode, struct file *file, - unsigned int cmd, unsigned long arg) -{ - int ret = -ENOTTY; - - switch (cmd) { - case WDIOC_GETSUPPORT: - ret = copy_to_user((struct watchdog_info __user *)arg, &ident, - sizeof(ident)) ? -EFAULT : 0; - break; - - case WDIOC_GETTIMEOUT: - ret = put_user(wdt_timeout, (int __user *)arg); - break; - - case WDIOC_SETTIMEOUT: - ret = get_user(wdt_timeout, (int __user *)arg); - break; - - case WDIOC_KEEPALIVE: - ifxmips_wdt_enable(wdt_timeout); - ret = 0; - break; - } - return ret; -} - -static int ifxmips_wdt_open(struct inode *inode, struct file *file) -{ - ifxmips_wdt_enable(wdt_timeout); - return nonseekable_open(inode, file); -} - -static int ifxmips_wdt_release(struct inode *inode, struct file *file) -{ -#ifndef CONFIG_WATCHDOG_NOWAYOUT - if (wdt_ok_to_close) - ifxmips_wdt_disable(); - else -#endif - printk(KERN_ERR "ifxmips_wdt: watchdog closed without warning," - " rebooting system\n"); - return 0; -} - -static const struct file_operations ifxmips_wdt_fops = { - .owner = THIS_MODULE, - .write = ifxmips_wdt_write, - .ioctl = ifxmips_wdt_ioctl, - .open = ifxmips_wdt_open, - .release = ifxmips_wdt_release, -}; - -static struct miscdevice ifxmips_wdt_miscdev = { - .minor = WATCHDOG_MINOR, - .name = "watchdog", - .fops = &ifxmips_wdt_fops, -}; - -static int ifxmips_wdt_probe(struct platform_device *dev) -{ - int err; - err = misc_register(&ifxmips_wdt_miscdev); - if (err) - printk(KERN_INFO "ifxmips_wdt: error creating device\n"); - else - printk(KERN_INFO "ifxmips_wdt: loaded\n"); - return err; -} - -static int ifxmips_wdt_remove(struct platform_device *dev) -{ - ifxmips_wdt_disable(); - misc_deregister(&ifxmips_wdt_miscdev); - return 0; -} - - -static struct platform_driver ifxmips_wdt_driver = { - .probe = ifxmips_wdt_probe, - .remove = ifxmips_wdt_remove, - .driver = { - .name = "ifxmips_wdt", - .owner = THIS_MODULE, - }, -}; - -static int __init init_ifxmips_wdt(void) -{ - int ret = platform_driver_register(&ifxmips_wdt_driver); - if (ret) - printk(KERN_INFO "ifxmips_wdt: error registering platfom driver!"); - return ret; -} - -static void __exit exit_ifxmips_wdt(void) -{ - platform_driver_unregister(&ifxmips_wdt_driver); -} - -module_init(init_ifxmips_wdt); -module_exit(exit_ifxmips_wdt); - -MODULE_AUTHOR("John Crispin <blogic@openwrt.org>"); -MODULE_DESCRIPTION("ifxmips Watchdog"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR); |