mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-12-05 12:20:38 +02:00
393 lines
11 KiB
Diff
393 lines
11 KiB
Diff
|
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))
|