--- /dev/null
+diff -ruN linux-2.4.30-patch006/drivers/char/ar7_wdt.c linux-2.4.30-patch007/drivers/char/ar7_wdt.c
+--- linux-2.4.30-patch006/drivers/char/ar7_wdt.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.30-patch007/drivers/char/ar7_wdt.c 2005-10-27 09:39:40.000000000 +0200
+@@ -0,0 +1,335 @@
++/* linux/drivers/char/ar7_wdt.c
++
++ TI AR7 watch dog timer support
++
++ Copyright (c) 2005 Enrik Berkhan <Enrik.Berkhan@akk.org>
++
++ Som code taken from:
++ National Semiconductor SCx200 Watchdog support
++ Copyright (c) 2001,2002 Christer Weinigel <wingel@nano-system.com>
++
++ 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.
++
++ The author(s) of this software shall not be held liable for damages
++ of any nature resulting due to the use of this software. This
++ software is provided AS-IS with no warranties. */
++
++#include <linux/config.h>
++#include <linux/module.h>
++#include <linux/errno.h>
++#include <linux/kernel.h>
++#include <linux/init.h>
++#include <linux/miscdevice.h>
++#include <linux/watchdog.h>
++#include <linux/notifier.h>
++#include <linux/reboot.h>
++#include <linux/ioport.h>
++
++#include <asm/uaccess.h>
++
++#include <asm/ar7/avalanche_misc.h>
++#include <asm/ar7/sangam.h>
++
++#define NAME "ar7_wdt"
++#define LONGNAME "TI AR7 Watchdog Timer"
++
++MODULE_AUTHOR("Enrik Berkhan <Enrik.Berkhan@akk.org>");
++MODULE_DESCRIPTION(LONGNAME);
++MODULE_LICENSE("GPL");
++
++#ifndef CONFIG_WATCHDOG_NOWAYOUT
++#define CONFIG_WATCHDOG_NOWAYOUT 0
++#endif
++
++static int margin = 60;
++MODULE_PARM(margin, "i");
++MODULE_PARM_DESC(margin, "Watchdog margin in seconds (1 - ~68)");
++
++static int nowayout = CONFIG_WATCHDOG_NOWAYOUT;
++MODULE_PARM(nowayout, "i");
++MODULE_PARM_DESC(nowayout, "Disable watchdog shutdown on close");
++
++typedef struct {
++ uint32_t kick_lock;
++ uint32_t kick;
++ uint32_t change_lock;
++ uint32_t change ;
++ uint32_t disable_lock;
++ uint32_t disable;
++ uint32_t prescale_lock;
++ uint32_t prescale;
++} ar7_wdt_t;
++
++volatile ar7_wdt_t *ar7_wdt = (ar7_wdt_t *)AVALANCHE_WATCHDOG_TIMER_BASE;
++
++static struct semaphore open_semaphore;
++static unsigned expect_close;
++
++/* XXX correct? assumed to be sysfreq/2. get this dynamically ... */
++#define vbus_freq 62500000
++
++/* XXX currently fixed, allows max margin ~68.72 secs */
++#define prescale_value 0xFFFF
++
++static void ar7_wdt_kick(uint32_t value)
++{
++ ar7_wdt->kick_lock = 0x5555;
++ if ((ar7_wdt->kick_lock & 3) == 1) {
++ ar7_wdt->kick_lock = 0xAAAA;
++ if ((ar7_wdt->kick_lock & 3) == 3) {
++ ar7_wdt->kick = value;
++ return;
++ }
++ }
++ printk(KERN_ERR NAME "failed to unlock WDT kick reg\n");
++}
++
++static void ar7_wdt_prescale(uint32_t value)
++{
++ ar7_wdt->prescale_lock = 0x5A5A;
++ if ((ar7_wdt->prescale_lock & 3) == 1) {
++ ar7_wdt->prescale_lock = 0xA5A5;
++ if ((ar7_wdt->prescale_lock & 3) == 3) {
++ ar7_wdt->prescale = value;
++ return;
++ }
++ }
++ printk(KERN_ERR NAME "failed to unlock WDT prescale reg\n");
++}
++
++static void ar7_wdt_change(uint32_t value)
++{
++ ar7_wdt->change_lock = 0x6666;
++ if ((ar7_wdt->change_lock & 3) == 1) {
++ ar7_wdt->change_lock = 0xBBBB;
++ if ((ar7_wdt->change_lock & 3) == 3) {
++ ar7_wdt->change = value;
++ return;
++ }
++ }
++ printk(KERN_ERR NAME "failed to unlock WDT change reg\n");
++}
++
++static void ar7_wdt_disable(uint32_t value)
++{
++ ar7_wdt->disable_lock = 0x7777;
++ if ((ar7_wdt->disable_lock & 3) == 1) {
++ ar7_wdt->disable_lock = 0xCCCC;
++ if ((ar7_wdt->disable_lock & 3) == 2) {
++ ar7_wdt->disable_lock = 0xDDDD;
++ if ((ar7_wdt->disable_lock & 3) == 3) {
++ ar7_wdt->disable = value;
++ return;
++ }
++ }
++ }
++ printk(KERN_ERR NAME "failed to unlock WDT disable reg\n");
++ return;
++}
++
++static void ar7_wdt_update_margin(int new_margin)
++{
++ uint32_t change;
++
++ change = new_margin * (vbus_freq / prescale_value);
++ if (change < 1) change = 1;
++ if (change > 0xFFFF) change = 0xFFFF;
++ ar7_wdt_change(change);
++ margin = change * prescale_value / vbus_freq;
++ printk(KERN_INFO NAME
++ ": timer margin %d seconds (prescale %d, change %d, freq %d)\n",
++ margin, prescale_value, change, vbus_freq);
++}
++
++static void ar7_wdt_enable_wdt(void)
++{
++ printk(KERN_DEBUG NAME ": enabling watchdog timer\n");
++ ar7_wdt_disable(1);
++ ar7_wdt_kick(1);
++}
++
++static void ar7_wdt_disable_wdt(void)
++{
++ printk(KERN_DEBUG NAME ": disabling watchdog timer\n");
++ ar7_wdt_disable(0);
++}
++
++static int ar7_wdt_open(struct inode *inode, struct file *file)
++{
++ /* only allow one at a time */
++ if (down_trylock(&open_semaphore))
++ return -EBUSY;
++ ar7_wdt_enable_wdt();
++ expect_close = 0;
++
++ return 0;
++}
++
++static int ar7_wdt_release(struct inode *inode, struct file *file)
++{
++ if (!expect_close) {
++ printk(KERN_WARNING NAME ": watchdog device closed unexpectedly, will not disable the watchdog timer\n");
++ } else if (!nowayout) {
++ ar7_wdt_disable_wdt();
++ }
++ up(&open_semaphore);
++
++ return 0;
++}
++
++static int ar7_wdt_notify_sys(struct notifier_block *this,
++ unsigned long code, void *unused)
++{
++ if (code == SYS_HALT || code == SYS_POWER_OFF)
++ if (!nowayout)
++ ar7_wdt_disable_wdt();
++
++ return NOTIFY_DONE;
++}
++
++static struct notifier_block ar7_wdt_notifier =
++{
++ .notifier_call = ar7_wdt_notify_sys
++};
++
++static ssize_t ar7_wdt_write(struct file *file, const char *data,
++ size_t len, loff_t *ppos)
++{
++ if (ppos != &file->f_pos)
++ return -ESPIPE;
++
++ /* check for a magic close character */
++ if (len)
++ {
++ size_t i;
++
++ ar7_wdt_kick(1);
++
++ expect_close = 0;
++ for (i = 0; i < len; ++i) {
++ char c;
++ if (get_user(c, data+i))
++ return -EFAULT;
++ if (c == 'V')
++ expect_close = 1;
++ }
++
++ }
++ return len;
++}
++
++static int ar7_wdt_ioctl(struct inode *inode, struct file *file,
++ unsigned int cmd, unsigned long arg)
++{
++ static struct watchdog_info ident = {
++ .identity = LONGNAME,
++ .firmware_version = 1,
++ .options = (WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING),
++ };
++ int new_margin;
++
++ switch (cmd) {
++ default:
++ return -ENOTTY;
++ case WDIOC_GETSUPPORT:
++ if(copy_to_user((struct watchdog_info *)arg, &ident,
++ sizeof(ident)))
++ return -EFAULT;
++ return 0;
++ case WDIOC_GETSTATUS:
++ case WDIOC_GETBOOTSTATUS:
++ if (put_user(0, (int *)arg))
++ return -EFAULT;
++ return 0;
++ case WDIOC_KEEPALIVE:
++ ar7_wdt_kick(1);
++ return 0;
++ case WDIOC_SETTIMEOUT:
++ if (get_user(new_margin, (int *)arg))
++ return -EFAULT;
++ if (new_margin < 1)
++ return -EINVAL;
++
++ ar7_wdt_update_margin(new_margin);
++ ar7_wdt_kick(1);
++
++ case WDIOC_GETTIMEOUT:
++ if (put_user(margin, (int *)arg))
++ return -EFAULT;
++ return 0;
++ }
++}
++
++static struct file_operations ar7_wdt_fops = {
++ .owner = THIS_MODULE,
++ .write = ar7_wdt_write,
++ .ioctl = ar7_wdt_ioctl,
++ .open = ar7_wdt_open,
++ .release = ar7_wdt_release,
++};
++
++static struct miscdevice ar7_wdt_miscdev = {
++ .minor = WATCHDOG_MINOR,
++ .name = "watchdog",
++ .fops = &ar7_wdt_fops,
++};
++
++static __initdata char *last_initiator[] = {
++ [HARDWARE_RESET] = "hardware reset",
++ [SOFTWARE_RESET0] = "SW0 software reset",
++ [SOFTWARE_RESET1] = "SW1 software reset",
++ [WATCHDOG_RESET] = "watchdog"
++};
++
++static int __init ar7_wdt_init(void)
++{
++ int r;
++
++ if (!request_mem_region(AVALANCHE_WATCHDOG_TIMER_BASE,
++ sizeof(ar7_wdt_t), LONGNAME)) {
++ printk(KERN_WARNING NAME ": watchdog I/O region busy\n");
++ return -EBUSY;
++ }
++
++ printk(KERN_INFO NAME ": last system reset initiated by %s\n",
++ last_initiator[avalanche_get_sys_last_reset_status()]);
++
++
++ ar7_wdt_disable_wdt();
++ ar7_wdt_prescale(prescale_value);
++ ar7_wdt_update_margin(margin);
++
++ sema_init(&open_semaphore, 1);
++
++ r = misc_register(&ar7_wdt_miscdev);
++ if (r) {
++ printk(KERN_ERR NAME ": unable to register misc device\n");
++ release_mem_region(AVALANCHE_WATCHDOG_TIMER_BASE,
++ sizeof(ar7_wdt_t));
++ return r;
++ }
++
++ r = register_reboot_notifier(&ar7_wdt_notifier);
++ if (r) {
++ printk(KERN_ERR NAME ": unable to register reboot notifier\n");
++ misc_deregister(&ar7_wdt_miscdev);
++ release_mem_region(AVALANCHE_WATCHDOG_TIMER_BASE,
++ sizeof(ar7_wdt_t));
++ return r;
++ }
++
++ return 0;
++}
++
++static void __exit ar7_wdt_cleanup(void)
++{
++ unregister_reboot_notifier(&ar7_wdt_notifier);
++ misc_deregister(&ar7_wdt_miscdev);
++ release_mem_region(AVALANCHE_WATCHDOG_TIMER_BASE, sizeof(ar7_wdt_t));
++}
++
++module_init(ar7_wdt_init);
++module_exit(ar7_wdt_cleanup);
+diff -ruN linux-2.4.30-patch006/drivers/char/Config.in linux-2.4.30-patch007/drivers/char/Config.in
+--- linux-2.4.30-patch006/drivers/char/Config.in 2005-10-27 11:25:29.000000000 +0200
++++ linux-2.4.30-patch007/drivers/char/Config.in 2005-10-27 11:17:32.000000000 +0200
+@@ -251,6 +251,9 @@
+ bool 'Watchdog Timer Support' CONFIG_WATCHDOG
+ if [ "$CONFIG_WATCHDOG" != "n" ]; then
+ bool ' Disable watchdog shutdown on close' CONFIG_WATCHDOG_NOWAYOUT
++ if [ "$CONFIG_AR7" = "y" ] ; then
++ tristate ' TI AR7 Watchdog Timer' CONFIG_AR7_WDT
++ else
+ tristate ' Acquire SBC Watchdog Timer' CONFIG_ACQUIRE_WDT
+ tristate ' Advantech SBC Watchdog Timer' CONFIG_ADVANTECH_WDT
+ tristate ' ALi M7101 PMU on ALi 1535D+ Watchdog Timer' CONFIG_ALIM1535_WDT
+@@ -271,7 +274,6 @@
+ tristate ' SBC-60XX Watchdog Timer' CONFIG_60XX_WDT
+ dep_tristate ' SC1200 Watchdog Timer (EXPERIMENTAL)' CONFIG_SC1200_WDT $CONFIG_EXPERIMENTAL
+ tristate ' NatSemi SCx200 Watchdog' CONFIG_SCx200_WDT
+- tristate ' Software Watchdog' CONFIG_SOFT_WATCHDOG
+ tristate ' W83877F (EMACS) Watchdog Timer' CONFIG_W83877F_WDT
+ tristate ' WDT Watchdog timer' CONFIG_WDT
+ tristate ' WDT PCI Watchdog timer' CONFIG_WDTPCI
+@@ -282,6 +284,8 @@
+ fi
+ fi
+ tristate ' ZF MachZ Watchdog' CONFIG_MACHZ_WDT
++ fi
++ tristate ' Software Watchdog' CONFIG_SOFT_WATCHDOG
+ if [ "$CONFIG_SGI_IP22" = "y" ]; then
+ dep_tristate ' Indy/I2 Hardware Watchdog' CONFIG_INDYDOG $CONFIG_SGI_IP22
+ fi
+diff -ruN linux-2.4.30-patch006/drivers/char/Makefile linux-2.4.30-patch007/drivers/char/Makefile
+--- linux-2.4.30-patch006/drivers/char/Makefile 2005-10-27 11:19:38.000000000 +0200
++++ linux-2.4.30-patch007/drivers/char/Makefile 2005-10-27 09:39:40.000000000 +0200
+@@ -342,6 +342,7 @@
+ obj-$(CONFIG_SOFT_WATCHDOG) += softdog.o
+ obj-$(CONFIG_INDYDOG) += indydog.o
+ obj-$(CONFIG_8xx_WDT) += mpc8xx_wdt.o
++obj-$(CONFIG_AR7_WDT) += ar7_wdt.o
+
+ subdir-$(CONFIG_MWAVE) += mwave
+ ifeq ($(CONFIG_MWAVE),y)
+diff -ruN linux-2.4.30-patch006/include/asm-mips/ar7/sangam.h linux-2.4.30-patch007/include/asm-mips/ar7/sangam.h
+--- linux-2.4.30-patch006/include/asm-mips/ar7/sangam.h 2005-10-27 11:25:51.000000000 +0200
++++ linux-2.4.30-patch007/include/asm-mips/ar7/sangam.h 2005-10-27 11:13:37.000000000 +0200
+@@ -152,7 +152,7 @@
+ #define AVALANCHE_EMIF_SDRAM_CFG (AVALANCHE_EMIF_CONTROL_BASE + 0x8)
+ #define AVALANCHE_RST_CTRL_PRCR (KSEG1ADDR(0x08611600))
+ #define AVALANCHE_RST_CTRL_SWRCR (KSEG1ADDR(0x08611604))
+-#define AVALANCHE_RST_CTRL_RSR (KSEG1ADDR(0x08611600))
++#define AVALANCHE_RST_CTRL_RSR (KSEG1ADDR(0x08611608))
+
+ #define AVALANCHE_POWER_CTRL_PDCR (KSEG1ADDR(0x08610A00))
+ #define AVALANCHE_WAKEUP_CTRL_WKCR (KSEG1ADDR(0x08610A0C))
projects / openwrt / staging / dedeckeh.git / blobdiff