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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.patch279
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");