diff options
Diffstat (limited to 'target/linux/au1000-2.6/patches/004-mtx1_watchdog.patch')
| -rw-r--r-- | target/linux/au1000-2.6/patches/004-mtx1_watchdog.patch | 279 |
1 files changed, 279 insertions, 0 deletions
diff --git a/target/linux/au1000-2.6/patches/004-mtx1_watchdog.patch b/target/linux/au1000-2.6/patches/004-mtx1_watchdog.patch new file mode 100644 index 0000000000..c7e329b295 --- /dev/null +++ b/target/linux/au1000-2.6/patches/004-mtx1_watchdog.patch @@ -0,0 +1,279 @@ +diff -urN linux-2.6.16.7/drivers/char/watchdog/Kconfig linux-2.6.16.7.new/drivers/char/watchdog/Kconfig +--- linux-2.6.16.7/drivers/char/watchdog/Kconfig 2006-04-17 23:53:25.000000000 +0200 ++++ linux-2.6.16.7.new/drivers/char/watchdog/Kconfig 2006-04-22 23:23:53.000000000 +0200 +@@ -460,6 +460,14 @@ + timer expired and no process has written to /dev/watchdog during + that time. + ++config MTX1_WATCHDOG ++ tristate "MTX-1 Hardware Watchdog" ++ depends on WATCHDOG && MIPS_MTX1 ++ help ++ Hardware driver for the AccessCube MTX-1 watchdog. This is a ++ watchdog timer that will reboot the machine after a 100 seconds ++ timer expired. ++ + # S390 Architecture + + config ZVM_WATCHDOG +diff -urN linux-2.6.16.7/drivers/char/watchdog/Makefile linux-2.6.16.7.new/drivers/char/watchdog/Makefile +--- linux-2.6.16.7/drivers/char/watchdog/Makefile 2006-04-17 23:53:25.000000000 +0200 ++++ linux-2.6.16.7.new/drivers/char/watchdog/Makefile 2006-04-22 23:21:18.000000000 +0200 +@@ -65,6 +65,7 @@ + + # MIPS Architecture + obj-$(CONFIG_INDYDOG) += indydog.o ++obj-$(CONFIG_MTX1_WATCHDOG) += mtx-1_watchdog.o + + # S390 Architecture + +diff -urN linux-2.6.16.7/drivers/char/watchdog/mtx-1_watchdog.c linux-2.6.16.7.new/drivers/char/watchdog/mtx-1_watchdog.c +--- linux-2.6.16.7/drivers/char/watchdog/mtx-1_watchdog.c 1970-01-01 01:00:00.000000000 +0100 ++++ linux-2.6.16.7.new/drivers/char/watchdog/mtx-1_watchdog.c 2006-04-22 23:20:53.000000000 +0200 +@@ -0,0 +1,246 @@ ++/* ++ * Driver for the MTX-1 Watchdog. ++ * ++ * (c) Copyright 2005 4G Systems <info@4g-systems.biz>, All Rights Reserved. ++ * http://www.4g-systems.biz ++ * ++ * 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. ++ * ++ * Neither Michael Stickel nor 4G Systems admit liability nor provide ++ * warranty for any of this software. This material is provided ++ * "AS-IS" and at no charge. ++ * ++ * (c) Copyright 2005 4G Systems <info@4g-systems.biz> ++ * ++ * Release 0.01. ++ * ++ * Author: Michael Stickel michael.stickel@4g-systems.biz ++ * ++ * ++ * The Watchdog is configured to reset the MTX-1 ++ * if it is not triggered for 100 seconds. ++ * It should not be triggered more often than 1.6 seconds. ++ * ++ * A timer triggers the watchdog every 5 seconds, until ++ * it is opened for the first time. After the first open ++ * it MUST be triggered every 2..95 seconds. ++ */ ++#include <linux/config.h> ++#include <linux/module.h> ++#include <linux/version.h> ++#include <linux/types.h> ++#include <linux/errno.h> ++#include <linux/kernel.h> ++#include <linux/sched.h> ++#include <linux/miscdevice.h> ++#include <linux/watchdog.h> ++#include <linux/slab.h> ++#include <linux/init.h> ++#include <asm/uaccess.h> ++#include <linux/fs.h> ++ ++#include <asm/mach-au1x00/au1000.h> ++ ++#ifndef FALSE ++# define FALSE (0) ++#endif ++ ++#ifndef TRUE ++# define TRUE (!FALSE) ++#endif ++ ++ ++//---------[ Hardware Functions ]----------------- ++ ++static void mtx1_trigger_wd (void) ++{ ++ /* ++ * toggle GPIO2_15 ++ */ ++ ++ u32 tmp = au_readl(GPIO2_DIR); ++ tmp = (tmp & ~(1<<15)) | ((~tmp) & (1<<15)); ++ au_writel (tmp, GPIO2_DIR); ++} ++ ++static void mtx1_enable_wd (void) ++{ ++ au_writel (au_readl(GPIO2_DIR) | (u32)(1<<15), GPIO2_DIR); ++} ++ ++static void mtx1_disable_wd (void) ++{ ++ au_writel (au_readl(GPIO2_DIR) & ~((u32)(1<<15)), GPIO2_DIR); ++} ++ ++ ++//---------[ Timer Functions ]----------------- ++ ++static struct timer_list wd_trigger_timer; ++static char timer_is_running = FALSE; ++ ++static void wd_timer_callback (unsigned long data) ++{ ++ if (timer_is_running) ++ mod_timer (&wd_trigger_timer, jiffies + 5 * HZ); ++ mtx1_trigger_wd(); ++} ++ ++static void start_wd_timer (void) ++{ ++ if (!timer_is_running) { ++ struct timer_list *t = &wd_trigger_timer; ++ ++ init_timer (t); ++ t->function = wd_timer_callback; ++ t->data = (unsigned long)0L; ++ t->expires = jiffies + 5 * HZ; // 5 seconds. ++ add_timer (t); ++ timer_is_running = TRUE; ++ } ++} ++ ++ ++ ++static void stop_wd_timer (void) ++{ ++ if (timer_is_running) { ++ del_timer(&wd_trigger_timer); ++ timer_is_running = FALSE; ++ } ++} ++ ++ ++//---------[ File Functions ]----------------- ++ ++static char restart_after_close; ++ ++static int mtx1wd_open (struct inode *inode, struct file *file) ++{ ++ if (MINOR(inode->i_rdev) != WATCHDOG_MINOR) return -ENODEV; ++ //MOD_INC_USE_COUNT; ++ ++ // stop the timer, if it is running. It will not be ++ // started again, until the module is loaded again. ++ stop_wd_timer(); ++ ++ // sleep for 2 seconds, to ensure, that the wd is ++ // not triggered more often than every 2 seconds. ++ schedule_timeout (2 * HZ); ++ ++ return 0; ++} ++ ++ ++static int mtx1wd_release (struct inode *inode, struct file *file) { ++ if (MINOR(inode->i_rdev)==WATCHDOG_MINOR) { ++ } ++ if (restart_after_close) ++ start_wd_timer(); ++ //MOD_DEC_USE_COUNT; ++ return 0; ++} ++ ++ ++static ssize_t mtx1wd_write (struct file *file, const char *buf, size_t count, loff_t *ppos) { ++ ++ mtx1_trigger_wd (); ++ ++ if (count > 0) { ++ char buffer[10]; ++ int n = (count>9)?9:count; ++ ++ if (copy_from_user (&buffer, buf, n)) ++ return -EFAULT; ++ buffer[n]=0; ++ ++ if (count >= 4 && strncmp("auto", buffer, 4)==0) ++ restart_after_close = 1; ++ ++ else if (count >= 6 && strncmp("manual", buffer, 6)==0) ++ restart_after_close = 0; ++ ++ return n; ++ } ++ ++ return 0; ++} ++ ++static ssize_t mtx1wd_read (struct file *file, char *buf, size_t count, loff_t *ppos) ++{ ++ char * state = restart_after_close ? "auto\n" : "manual\n"; ++ int n = strlen(state)+1; ++ ++ if (file->f_pos >= n) ++ return 0; ++ ++ if (count < n) ++ return -EINVAL; ++ ++ if(copy_to_user(buf, state, n)) ++ return -EFAULT; ++ ++ file->f_pos += n; ++ ++ return n; ++} ++ ++static struct file_operations mtx1wd_fops = { ++ .owner = THIS_MODULE, ++ .read = mtx1wd_read, ++ .write = mtx1wd_write, ++ .open = mtx1wd_open, ++ .release = mtx1wd_release ++}; ++ ++ ++static struct miscdevice mtx1wd_miscdev = { ++ WATCHDOG_MINOR, ++ "watchdog", ++ &mtx1wd_fops ++}; ++ ++ ++ ++//---------[ Module Functions ]----------------- ++ ++ ++static int __init init_mtx1_watchdog(void) ++{ ++ printk("MTX-1 watchdog driver\n"); ++ ++ misc_register(&mtx1wd_miscdev); ++ ++ restart_after_close = 0; ++ ++ mtx1_enable_wd (); ++ ++ //-- trigger it for the first time. ++ //-- We do not exactly know how long it has not been triggered. ++ mtx1_trigger_wd (); ++ ++ // start a timer, that calls mtx1_trigger_wd every 5 seconds. ++ start_wd_timer(); ++ ++ return 0; ++} ++ ++static void __exit exit_mtx1_watchdog(void) { ++ ++ // stop the timer, if it is running. ++ stop_wd_timer(); ++ ++ misc_deregister(&mtx1wd_miscdev); ++ ++ mtx1_disable_wd(); ++} ++ ++module_init(init_mtx1_watchdog); ++module_exit(exit_mtx1_watchdog); ++ ++MODULE_AUTHOR("Michael Stickel"); ++MODULE_DESCRIPTION("Driver for the MTX-1 watchdog"); ++MODULE_LICENSE("GPL"); |