--- /dev/null
+/*
+ * RC32434_WDT 0.01: IDT Interprise 79RC32434 watchdog driver
+ * Copyright (c) Ondrej Zajicek <santiago@crfreenet.org>, 2006
+ *
+ * based on
+ *
+ * SoftDog 0.05: A Software Watchdog Device
+ *
+ * (c) Copyright 1996 Alan Cox <alan@redhat.com>, All Rights Reserved.
+ *
+ * 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.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/fs.h>
+#include <linux/mm.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <linux/reboot.h>
+#include <linux/smp_lock.h>
+#include <linux/init.h>
+#include <asm/bootinfo.h>
+#include <asm/time.h>
+#include <asm/uaccess.h>
+#include <asm/rc32434/integ.h>
+
+#define DEFAULT_TIMEOUT 15 /* (secs) Default is 15 seconds */
+#define MAX_TIMEOUT 20
+/*
+ * (secs) Max is 20 seconds
+ * (max frequency of counter is ~200 MHz, counter is 32-bit unsigned int)
+ */
+
+#define NAME "rc32434_wdt"
+#define VERSION "0.1"
+
+static INTEG_t rc_wdt = (INTEG_t) INTEG_VirtualAddress;
+
+static int expect_close = 0;
+static int access = 0;
+static int timeout = 0;
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+MODULE_LICENSE("GPL");
+
+
+static inline void start_wdt(void)
+{
+ rc_wdt -> wtcount = 0;
+ rc_wdt -> errcs |= ERRCS_wre_m;
+ rc_wdt -> wtc |= WTC_en_m;
+}
+
+static inline void stop_wdt(void)
+{
+ rc_wdt -> wtc &= ~WTC_en_m;
+ rc_wdt -> errcs &= ~ERRCS_wre_m;
+}
+
+static inline void set_wdt(int new_timeout)
+{
+ u32 cmp = new_timeout * mips_hpt_frequency;
+ u32 state;
+
+ timeout = new_timeout;
+ /*
+ * store and disable WTC
+ */
+ state = rc_wdt -> wtc & WTC_en_m;
+ rc_wdt -> wtc &= ~WTC_en_m;
+
+ rc_wdt -> wtcount = 0;
+ rc_wdt -> wtcompare = cmp;
+
+ /*
+ * restore WTC
+ */
+ rc_wdt -> wtc |= state;
+}
+
+static inline void update_wdt(void)
+{
+ rc_wdt -> wtcount = 0;
+}
+
+/*
+ * Allow only one person to hold it open
+ */
+
+static int wdt_open(struct inode *inode, struct file *file)
+{
+ if (access)
+ return -EBUSY;
+ if (nowayout) {
+ __module_get(THIS_MODULE);
+ }
+ /*
+ * Activate timer
+ */
+ start_wdt();
+ printk(KERN_INFO NAME ": enabling watchdog timer\n");
+ access = 1;
+ return 0;
+}
+
+static int wdt_release(struct inode *inode, struct file *file)
+{
+ /*
+ * Shut off the timer.
+ * Lock it in if it's a module and we set nowayout
+ */
+ if (expect_close && nowayout == 0) {
+ stop_wdt ();
+ printk(KERN_INFO NAME ": disabling watchdog timer\n");
+ module_put(THIS_MODULE);
+ } else {
+ printk (KERN_CRIT NAME ": device closed unexpectedly. WDT will not stop!\n");
+ }
+ access = 0;
+ return 0;
+}
+
+static ssize_t wdt_write(struct file *file, const char *data, size_t len, loff_t *ppos)
+{
+ /*
+ * Refresh the timer.
+ */
+ if (len) {
+ if (!nowayout) {
+ size_t i;
+
+ /* In case it was set long ago */
+ 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;
+ }
+ }
+ update_wdt ();
+ return len;
+ }
+ return 0;
+}
+
+static int wdt_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ int new_timeout;
+ static struct watchdog_info ident = {
+ .options = WDIOF_SETTIMEOUT |
+ WDIOF_KEEPALIVEPING |
+ WDIOF_MAGICCLOSE,
+ .firmware_version = 0,
+ .identity = "RC32434_WDT Watchdog",
+ };
+ 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:
+ return put_user(0,(int *)arg);
+ case WDIOC_KEEPALIVE:
+ update_wdt();
+ return 0;
+ case WDIOC_SETTIMEOUT:
+ if (get_user(new_timeout, (int *)arg))
+ return -EFAULT;
+ if (new_timeout < 1)
+ return -EINVAL;
+ if (new_timeout > MAX_TIMEOUT)
+ return -EINVAL;
+ set_wdt(new_timeout);
+ /* Fall */
+ case WDIOC_GETTIMEOUT:
+ return put_user(timeout, (int *)arg);
+ }
+}
+
+static struct file_operations wdt_fops = {
+ owner: THIS_MODULE,
+ llseek: no_llseek,
+ write: wdt_write,
+ ioctl: wdt_ioctl,
+ open: wdt_open,
+ release: wdt_release,
+};
+
+static struct miscdevice wdt_miscdev = {
+ minor: WATCHDOG_MINOR,
+ name: "watchdog",
+ fops: &wdt_fops,
+};
+
+static char banner[] __initdata = KERN_INFO NAME ": Watchdog Timer version " VERSION ", timer margin: %d sec\n";
+
+static int __init watchdog_init(void)
+{
+ int ret;
+
+ /*
+ * There should be check for RC32434 SoC
+ */
+ if (mips_machgroup != MACH_GROUP_MIKROTIK) return -1;
+
+ ret = misc_register(&wdt_miscdev);
+
+ if (ret)
+ return ret;
+
+ stop_wdt();
+ set_wdt(DEFAULT_TIMEOUT);
+
+ printk(banner, timeout);
+
+ return 0;
+}
+
+static void __exit watchdog_exit(void)
+{
+ misc_deregister(&wdt_miscdev);
+}
+
+module_init(watchdog_init);
+module_exit(watchdog_exit);
--- /dev/null
+#ifndef __IDT_INTEG_H__
+#define __IDT_INTEG_H__
+
+/*******************************************************************************
+ *
+ * Copyright 2002 Integrated Device Technology, Inc.
+ * All rights reserved.
+ *
+ * System Integrity register definition.
+ *
+ * File : $Id: integ.h,v 1.3 2002/06/06 18:34:04 astichte Exp $
+ *
+ * Author : ryan.holmQVist@idt.com
+ * Date : 20011005
+ * Update :
+ * $Log: integ.h,v $
+ * Revision 1.3 2002/06/06 18:34:04 astichte
+ * Added XXX_PhysicalAddress and XXX_VirtualAddress
+ *
+ * Revision 1.2 2002/06/05 18:32:33 astichte
+ * Removed IDTField
+ *
+ * Revision 1.1 2002/05/29 17:33:22 sysarch
+ * jba File moved from vcode/include/idt/acacia
+ *
+ ******************************************************************************/
+
+enum
+{
+ INTEG0_PhysicalAddress = 0x18030000,
+ INTEG_PhysicalAddress = INTEG0_PhysicalAddress, // Default
+
+ INTEG0_VirtualAddress = 0xb8030000,
+ INTEG_VirtualAddress = INTEG0_VirtualAddress, // Default
+} ;
+
+// if you are looing for CEA, try rst.h
+typedef struct
+{
+ u32 filler [0xc] ; // 0x30 bytes unused.
+ u32 errcs ; // sticky use ERRCS_
+ u32 wtcount ; // Watchdog timer count reg.
+ u32 wtcompare ; // Watchdog timer timeout value.
+ u32 wtc ; // Watchdog timer control. use WTC_
+} volatile *INTEG_t ;
+
+enum
+{
+ ERRCS_wto_b = 0, // In INTEG_t -> errcs
+ ERRCS_wto_m = 0x00000001,
+ ERRCS_wne_b = 1, // In INTEG_t -> errcs
+ ERRCS_wne_m = 0x00000002,
+ ERRCS_ucw_b = 2, // In INTEG_t -> errcs
+ ERRCS_ucw_m = 0x00000004,
+ ERRCS_ucr_b = 3, // In INTEG_t -> errcs
+ ERRCS_ucr_m = 0x00000008,
+ ERRCS_upw_b = 4, // In INTEG_t -> errcs
+ ERRCS_upw_m = 0x00000010,
+ ERRCS_upr_b = 5, // In INTEG_t -> errcs
+ ERRCS_upr_m = 0x00000020,
+ ERRCS_udw_b = 6, // In INTEG_t -> errcs
+ ERRCS_udw_m = 0x00000040,
+ ERRCS_udr_b = 7, // In INTEG_t -> errcs
+ ERRCS_udr_m = 0x00000080,
+ ERRCS_sae_b = 8, // In INTEG_t -> errcs
+ ERRCS_sae_m = 0x00000100,
+ ERRCS_wre_b = 9, // In INTEG_t -> errcs
+ ERRCS_wre_m = 0x00000200,
+
+ WTC_en_b = 0, // In INTEG_t -> wtc
+ WTC_en_m = 0x00000001,
+ WTC_to_b = 1, // In INTEG_t -> wtc
+ WTC_to_m = 0x00000002,
+} ;
+
+#endif // __IDT_INTEG_H__
--- /dev/null
+diff -ur linux-2.6.22.4.old/arch/mips/kernel/time.c linux-2.6.22.4.new/arch/mips/kernel/time.c
+--- linux-2.6.22.4.old/arch/mips/kernel/time.c 2007-08-21 06:33:06.000000000 +0200
++++ linux-2.6.22.4.new/arch/mips/kernel/time.c 2007-12-24 17:13:43.000000000 +0100
+@@ -478,3 +478,5 @@
+ EXPORT_SYMBOL(to_tm);
+ EXPORT_SYMBOL(rtc_mips_set_time);
+ EXPORT_SYMBOL(rtc_mips_get_time);
++EXPORT_SYMBOL(mips_hpt_frequency);
++
+diff -ur linux-2.6.22.4.old/drivers/char/watchdog/Kconfig linux-2.6.22.4.new/drivers/char/watchdog/Kconfig
+--- linux-2.6.22.4.old/drivers/char/watchdog/Kconfig 2007-08-21 06:33:06.000000000 +0200
++++ linux-2.6.22.4.new/drivers/char/watchdog/Kconfig 2007-12-24 17:13:43.000000000 +0100
+@@ -575,6 +575,19 @@
+ To compile this driver as a module, choose M here: the
+ module will be called rm9k_wdt.
+
++config RC32434_WDT
++ tristate "IDT Interprise 79RC32434 SoC hardware watchdog"
++ depends on WATCHDOG && MIKROTIK_RB500
++ help
++ This is a driver for hardware watchdog integrated in IDT Interprise
++ 79RC32434 SoC. This watchdog simply watches your kernel to make sure
++ it doesn't freeze, and if it does, it reboots your computer after a
++ certain amount of time.
++
++ To compile this driver as a module, choose M here: the module will be
++ called rc32434_wdt.
++
++
+ # S390 Architecture
+
+ config ZVM_WATCHDOG
+diff -ur linux-2.6.22.4.old/drivers/char/watchdog/Makefile linux-2.6.22.4.new/drivers/char/watchdog/Makefile
+--- linux-2.6.22.4.old/drivers/char/watchdog/Makefile 2007-08-21 06:33:06.000000000 +0200
++++ linux-2.6.22.4.new/drivers/char/watchdog/Makefile 2007-12-24 17:13:43.000000000 +0100
+@@ -75,6 +75,7 @@
+ obj-$(CONFIG_INDYDOG) += indydog.o
+ obj-$(CONFIG_WDT_MTX1) += mtx-1_wdt.o
+ obj-$(CONFIG_WDT_RM9K_GPI) += rm9k_wdt.o
++obj-$(CONFIG_RC32434_WDT) += rc32434_wdt.o
+
+ # S390 Architecture
+
projects / openwrt.git / commitdiff