hardware watchdog

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@3655 3c298f89-4303-0410-b956-a3cf2f4a3e73

2 files changed, 159 insertions, 39 deletions

diff --git a/openwrt/target/linux/aruba-2.6/patches/000-aruba.patch b/openwrt/target/linux/aruba-2.6/patches/000-aruba.patch
index 34fbaf2de..0cf61f02e 100644
--- a/openwrt/target/linux/aruba-2.6/patches/000-aruba.patch
+++ b/openwrt/target/linux/aruba-2.6/patches/000-aruba.patch
@@ -45,7 +45,7 @@ diff -Nur linux-2.6.16/arch/mips/aruba/Makefile linux-2.6.16-owrt/arch/mips/arub
 +# .S.o:
 +# 	$(CC) $(CFLAGS) -c $< -o $*.o
 +
-+obj-y	 := prom.o setup.o idtIRQ.o irq.o time.o flash_lock.o wdt_merlot.o
++obj-y	 := prom.o setup.o idtIRQ.o irq.o time.o flash_lock.o
 +obj-$(CONFIG_SERIAL_8250) 		+= serial.o
 +
 +subdir-y         += nvram
@@ -783,7 +783,7 @@ diff -Nur linux-2.6.16/arch/mips/aruba/serial.c linux-2.6.16-owrt/arch/mips/arub
 diff -Nur linux-2.6.16/arch/mips/aruba/setup.c linux-2.6.16-owrt/arch/mips/aruba/setup.c
 --- linux-2.6.16/arch/mips/aruba/setup.c	1970-01-01 01:00:00.000000000 +0100
 +++ linux-2.6.16-owrt/arch/mips/aruba/setup.c	2006-03-20 14:30:00.000000000 +0100
-@@ -0,0 +1,125 @@
+@@ -0,0 +1,122 @@
 +/**************************************************************************
 + *
 + *  BRIEF MODULE DESCRIPTION
@@ -872,7 +872,6 @@ diff -Nur linux-2.6.16/arch/mips/aruba/setup.c linux-2.6.16-owrt/arch/mips/aruba
 +
 +extern char * getenv(char *e);
 +extern void unlock_ap60_70_flash(void);
-+extern void wdt_merlot_disable(void);
 +
 +void __init plat_setup(void)
 +{
@@ -895,8 +894,6 @@ diff -Nur linux-2.6.16/arch/mips/aruba/setup.c linux-2.6.16-owrt/arch/mips/aruba
 +
 +	printk("BOARD - %s\n",getenv("boardname"));
 +
-+	wdt_merlot_disable();
-+
 +	return 0;
 +}
 +
@@ -1021,40 +1018,6 @@ diff -Nur linux-2.6.16/arch/mips/aruba/time.c linux-2.6.16-owrt/arch/mips/aruba/
 +	timer_interrupt(irq, NULL, regs);
 +	irq_exit();
 +}
-diff -Nur linux-2.6.16/arch/mips/aruba/wdt_merlot.c linux-2.6.16-owrt/arch/mips/aruba/wdt_merlot.c
---- linux-2.6.16/arch/mips/aruba/wdt_merlot.c	1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.16-owrt/arch/mips/aruba/wdt_merlot.c	2006-03-20 14:25:10.000000000 +0100
-@@ -0,0 +1,30 @@
-+#include <linux/config.h>
-+#include <linux/kernel.h>
-+#include <asm/bootinfo.h>
-+
-+void wdt_merlot_disable()
-+{
-+	volatile __u32 *wdt_errcs;
-+	volatile __u32 *wdt_wtc;
-+	volatile __u32 *wdt_ctl;
-+	volatile __u32 val;
-+
-+	switch (mips_machtype) {
-+		case MACH_ARUBA_AP70:
-+			wdt_errcs = (__u32 *) 0xb8030030;
-+			wdt_wtc = (__u32 *) 0xb803003c;
-+			val = *wdt_errcs;
-+			val &= ~0x201;
-+			*wdt_errcs = val;
-+			val = *wdt_wtc;
-+			val &= ~0x1;
-+			*wdt_wtc = val;
-+			break;
-+		case MACH_ARUBA_AP65:
-+		case MACH_ARUBA_AP60:
-+		default:
-+			wdt_ctl = (__u32 *) 0xbc003008;
-+			*wdt_ctl = 0;
-+			break;
-+	}
-+}
 diff -Nur linux-2.6.16/arch/mips/Kconfig linux-2.6.16-owrt/arch/mips/Kconfig
 --- linux-2.6.16/arch/mips/Kconfig	2006-03-20 06:53:29.000000000 +0100
 +++ linux-2.6.16-owrt/arch/mips/Kconfig	2006-03-20 14:25:10.000000000 +0100
diff --git a/openwrt/target/linux/aruba-2.6/patches/004-wdt.patch b/openwrt/target/linux/aruba-2.6/patches/004-wdt.patch
new file mode 100644
index 000000000..cb2e76e78
--- /dev/null
+++ b/openwrt/target/linux/aruba-2.6/patches/004-wdt.patch
@@ -0,0 +1,157 @@
+diff -Nur linux-2.6.15.1/drivers/char/watchdog/wdt_merlot.c linux-2.6.15.1-openwrt/drivers/char/watchdog/wdt_merlot.c
+--- linux-2.6.15.1/drivers/char/watchdog/wdt_merlot.c	2006-01-26 21:14:02.204626250 -0800
++++ linux-2.6.15.1-openwrt/drivers/char/watchdog/wdt_merlot.c	2006-02-02 20:31:43.000000000 -0800
+@@ -0,0 +1,141 @@
++#include <linux/config.h>
++#include <linux/module.h>
++#include <linux/types.h>
++#include <linux/miscdevice.h>
++#include <linux/watchdog.h>
++#include <linux/fs.h>
++
++#include <asm/io.h>
++#include <asm/uaccess.h>
++#include <asm/system.h>
++#include <asm/bootinfo.h>
++
++// refresh the watchdog timer for this many seconds in kernel
++// before letting the watchdog process take over.
++#define WDT_COUNT 60
++
++extern unsigned long mips_machtype;
++
++static unsigned long wdt_is_open;
++static struct timer_list wdt_timer;
++static int wdt_count = WDT_COUNT;
++
++static void wdt_merlot_refresh(void){
++  volatile __u32 *wdt;
++  switch (mips_machtype) {
++  case MACH_ARUBA_AP70:
++    wdt = (__u32 *)0xb8030034;
++    *wdt = 0x10000000;
++    break;
++  default:
++    wdt = (__u32 *)0xbc00300c;
++    *wdt = 0x40000000;
++    break;
++  }
++}
++
++static void wdt_merlot_disable()
++{
++  volatile __u32 *wdt_errcs;
++  volatile __u32 *wdt_wtc;
++  volatile __u32 *wdt_ctl;
++  volatile __u32 val ;
++
++  switch (mips_machtype) {
++  case MACH_ARUBA_AP70:
++    wdt_errcs = (__u32 *)0xb8030030 ;
++    wdt_wtc   = (__u32 *)0xb803003c ;
++    val = *wdt_errcs ;
++    val &= ~0x201 ;
++    *wdt_errcs = val ;
++    val = *wdt_wtc ;
++    val &= ~0x1 ;
++    *wdt_wtc = val ;
++    break;
++  default:
++    wdt_ctl = (__u32 *)0xbc003008;
++    *wdt_ctl = 0 ;
++    break;
++  }
++}
++
++static void wdt_merlot_timer_fn(unsigned long data){
++
++  wdt_merlot_refresh();
++  if (--wdt_count >= 0)
++    mod_timer(&wdt_timer, jiffies + HZ);
++  else
++    wdt_merlot_disable();
++
++}
++
++static int wdt_merlot_setup_timer(void){
++
++  init_timer(&wdt_timer);
++  wdt_timer.function = wdt_merlot_timer_fn;
++  wdt_timer.data = 0;
++  wdt_timer.expires = jiffies + HZ;
++  add_timer(&wdt_timer);
++  return 0;
++}
++
++static int wdt_open(struct inode *inode, struct file *file)
++{
++	if(test_and_set_bit(0, &wdt_is_open))
++		return -EBUSY;
++	wdt_count=0;
++	return nonseekable_open(inode, file);
++}
++
++static ssize_t wdt_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
++{
++	if (count) { /* something was written */
++  		wdt_merlot_refresh();
++	}
++	return count;
++}
++
++static int wdt_release(struct inode *inode, struct file *file)
++{
++	clear_bit(0, &wdt_is_open);
++	return 0;
++}
++
++static struct file_operations wdt_fops = {
++	.owner		= THIS_MODULE,
++	.llseek		= no_llseek,
++	.write		= wdt_write,
++	.open		= wdt_open,
++	.release	= wdt_release,
++};
++
++static struct miscdevice wdt_miscdev = {
++	.minor	= WATCHDOG_MINOR,
++	.name	= "watchdog",
++	.fops	= &wdt_fops,
++};
++
++static void __exit wdt_exit(void)
++{
++	misc_deregister(&wdt_miscdev);
++}
++
++static int __init wdt_init(void)
++{
++	int ret;
++	ret = misc_register(&wdt_miscdev);
++	if (ret) {
++		printk(KERN_ERR "wdt: cannot register miscdev on minor=%d (err=%d)\n",
++			WATCHDOG_MINOR, ret);
++		misc_deregister(&wdt_miscdev);
++		goto out;
++	}
++	printk("wdt: registered with refresh\n");
++	wdt_merlot_refresh();
++	wdt_merlot_setup_timer();
++out:
++	return ret;
++}
++
++module_init(wdt_init);
++module_exit(wdt_exit);
+diff -Nur linux-2.6.15.3/drivers/char/watchdog/Makefile linux-2.6.15.3-openwrt/drivers/char/watchdog/Makefile
+--- linux-2.6.15.3/drivers/char/watchdog/Makefile	2006-02-22 10:04:18.596278000 -0800
++++ linux-2.6.15.3-openwrt/drivers/char/watchdog/Makefile	2006-02-22 10:06:21.400960000 -0800
+@@ -71,5 +71,8 @@
+ 
+ # SPARC64 Architecture
+ 
++# Aruba Architecture
++obj-$(CONFIG_MACH_ARUBA) += wdt_merlot.o
++
+ # Architecture Independant
+ obj-$(CONFIG_SOFT_WATCHDOG) += softdog.o