X-Git-Url: https://git.rohieb.name/openwrt.git/blobdiff_plain/5389989abaa52926b22f9f030d1481df1e73d745..17c7b6c3fdc48301e50d22cc6138ede16bd1be24:/target/linux/brcm63xx-2.6/files/arch/mips/bcm963xx/wdt.c?ds=sidebyside diff --git a/target/linux/brcm63xx-2.6/files/arch/mips/bcm963xx/wdt.c b/target/linux/brcm63xx-2.6/files/arch/mips/bcm963xx/wdt.c deleted file mode 100644 index 0ea36a67f..000000000 --- a/target/linux/brcm63xx-2.6/files/arch/mips/bcm963xx/wdt.c +++ /dev/null @@ -1,246 +0,0 @@ -/* - * Watchdog driver for the BCM963xx devices - * - * Copyright (C) 2007 OpenWrt.org - * Florian Fainelli - * - * 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 -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -typedef struct bcm963xx_timer { - unsigned short unused0; - unsigned char timer_mask; -#define TIMER0EN 0x01 -#define TIMER1EN 0x02 -#define TIMER2EN 0x04 - unsigned char timer_ints; -#define TIMER0 0x01 -#define TIMER1 0x02 -#define TIMER2 0x04 -#define WATCHDOG 0x08 - unsigned long timer_ctl0; - unsigned long timer_ctl1; - unsigned long timer_ctl2; -#define TIMERENABLE 0x80000000 -#define RSTCNTCLR 0x40000000 - unsigned long timer_cnt0; - unsigned long timer_cnt1; - unsigned long timer_cnt2; - unsigned long wdt_def_count; - - /* Write 0xff00 0x00ff to Start timer - * Write 0xee00 0x00ee to Stop and re-load default count - * Read from this register returns current watch dog count - */ - unsigned long wdt_ctl; - - /* Number of 40-MHz ticks for WD Reset pulse to last */ - unsigned long wdt_rst_count; -} bcm963xx_timer; - -static struct bcm963xx_wdt_device { - struct completion stop; - volatile int running; - struct timer_list timer; - volatile int queue; - int default_ticks; - unsigned long inuse; -} bcm963xx_wdt_device; - -static int ticks = 1000; - -#define WDT_BASE 0xfffe0200 -#define WDT ((volatile bcm963xx_timer * const) WDT_BASE) - -#define BCM963XX_INTERVAL (HZ/10+1) - -static void bcm963xx_wdt_trigger(unsigned long unused) -{ - if (bcm963xx_wdt_device.running) - ticks--; - - /* Load the default ticking value into the reset counter register */ - WDT->wdt_rst_count = bcm963xx_wdt_device.default_ticks; - - if (bcm963xx_wdt_device.queue && ticks) { - bcm963xx_wdt_device.timer.expires = jiffies + BCM963XX_INTERVAL; - add_timer(&bcm963xx_wdt_device.timer); - } - else { - complete(&bcm963xx_wdt_device.stop); - } -} - -static void bcm963xx_wdt_reset(void) -{ - ticks = bcm963xx_wdt_device.default_ticks; - /* Also reload default count */ - WDT->wdt_def_count = ticks; - WDT->wdt_ctl = 0xee00; - WDT->wdt_ctl = 0x00ee; -} - -static void bcm963xx_wdt_start(void) -{ - if (!bcm963xx_wdt_device.queue) { - bcm963xx_wdt_device.queue; - /* Enable the watchdog by writing 0xff00 ,then 0x00ff to the control register */ - WDT->wdt_ctl = 0xff00; - WDT->wdt_ctl = 0x00ff; - bcm963xx_wdt_device.timer.expires = jiffies + BCM963XX_INTERVAL; - add_timer(&bcm963xx_wdt_device.timer); - } - bcm963xx_wdt_device.running++; -} - -static int bcm963xx_wdt_stop(void) -{ - if (bcm963xx_wdt_device.running) - bcm963xx_wdt_device.running = 0; - - ticks = bcm963xx_wdt_device.default_ticks; - - /* Stop the watchdog by writing 0xee00 then 0x00ee to the control register */ - WDT->wdt_ctl = 0xee00; - WDT->wdt_ctl = 0x00ee; - - return -EIO; -} - -static int bcm963xx_wdt_open(struct inode *inode, struct file *file) -{ - if (test_and_set_bit(0, &bcm963xx_wdt_device.inuse)) - return -EBUSY; - return nonseekable_open(inode, file); -} - -static int bcm963xx_wdt_release(struct inode *inode, struct file *file) -{ - clear_bit(0, &bcm963xx_wdt_device.inuse); - return 0; -} - -static int bcm963xx_wdt_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 = "BCM963xx WDT", - }; - - switch (cmd) { - case WDIOC_KEEPALIVE: - bcm963xx_wdt_reset(); - break; - case WDIOC_GETSTATUS: - /* Reading from the control register will return the current value */ - value = WDT->wdt_ctl; - 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: - bcm963xx_wdt_start(); - break; - case WDIOS_DISABLECARD: - bcm963xx_wdt_stop(); - break; - default: - return -EINVAL; - } - break; - default: - return -ENOTTY; - } - return 0; -} - -static int bcm963xx_wdt_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) -{ - if (!count) - return -EIO; - bcm963xx_wdt_reset(); - return count; -} - -static const struct file_operations bcm963xx_wdt_fops = { - .owner = THIS_MODULE, - .llseek = no_llseek, - .write = bcm963xx_wdt_write, - .ioctl = bcm963xx_wdt_ioctl, - .open = bcm963xx_wdt_open, - .release = bcm963xx_wdt_release, -}; - -static struct miscdevice bcm963xx_wdt_miscdev = { - .minor = WATCHDOG_MINOR, - .name = "watchdog", - .fops = &bcm963xx_wdt_fops, -}; - -static void __exit bcm963xx_wdt_exit(void) -{ - if (bcm963xx_wdt_device.queue ){ - bcm963xx_wdt_device.queue = 0; - wait_for_completion(&bcm963xx_wdt_device.stop); - } - misc_deregister(&bcm963xx_wdt_miscdev); -} - -static int __init bcm963xx_wdt_init(void) -{ - int ret = 0; - - printk("Broadcom BCM963xx Watchdog timer\n"); - - ret = misc_register(&bcm963xx_wdt_miscdev); - if (ret) { - printk(KERN_CRIT "Cannot register miscdev on minor=%d (err=%d)\n", WATCHDOG_MINOR, ret); - return ret; - } - init_completion(&bcm963xx_wdt_device.stop); - bcm963xx_wdt_device.queue = 0; - - clear_bit(0, &bcm963xx_wdt_device.inuse); - - init_timer(&bcm963xx_wdt_device.timer); - bcm963xx_wdt_device.timer.function = bcm963xx_wdt_trigger; - bcm963xx_wdt_device.timer.data = 0; - - bcm963xx_wdt_device.default_ticks = ticks; - return ret; -} - - -module_init(bcm963xx_wdt_init); -module_exit(bcm963xx_wdt_exit); - -MODULE_AUTHOR("Florian Fainelli "); -MODULE_DESCRIPTION("Broadcom BCM963xx Watchdog driver"); -MODULE_LICENSE("GPL");