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author | Florian Fainelli <florian@openwrt.org> | 2007-05-06 08:47:38 +0000 |
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committer | Florian Fainelli <florian@openwrt.org> | 2007-05-06 08:47:38 +0000 |
commit | b944dd2c57df07bae4a48086121083e88314b14a (patch) | |
tree | e23a14d9a6f1bb5f4161459b635d94c2a12f2ef0 /target/linux/au1000-2.6/patches | |
parent | 6e93fa59ef59405c9c1abcc9ed1e711396f8e92c (diff) | |
download | master-31e0f0ae-b944dd2c57df07bae4a48086121083e88314b14a.tar.gz master-31e0f0ae-b944dd2c57df07bae4a48086121083e88314b14a.tar.bz2 master-31e0f0ae-b944dd2c57df07bae4a48086121083e88314b14a.zip |
Update the watchdog driver to make it more linux look alike
SVN-Revision: 7100
Diffstat (limited to 'target/linux/au1000-2.6/patches')
-rw-r--r-- | target/linux/au1000-2.6/patches/004-mtx1_watchdog.patch | 251 |
1 files changed, 0 insertions, 251 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 index d3b7c32e2e..273de9fa6a 100644 --- a/target/linux/au1000-2.6/patches/004-mtx1_watchdog.patch +++ b/target/linux/au1000-2.6/patches/004-mtx1_watchdog.patch @@ -26,254 +26,3 @@ diff -urN linux-2.6.16.7/drivers/char/watchdog/Makefile linux-2.6.16.7.new/drive +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/autoconf.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"); |