From 18842f8755afe29b5c0a8eee3a416099c1a3ef88 Mon Sep 17 00:00:00 2001
From: blogic <blogic@3c298f89-4303-0410-b956-a3cf2f4a3e73>
Date: Thu, 14 Aug 2008 16:08:46 +0000
Subject: adds watchdog driver to ar5315
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@12309 3c298f89-4303-0410-b956-a3cf2f4a3e73
---
target/linux/atheros/config-2.6.26 | 1 +
.../atheros/files/arch/mips/atheros/ar5315/board.c | 9 +-
.../atheros/files/drivers/watchdog/ar2315-wtd.c | 198 +++++++++++++++++++++
.../atheros/patches-2.6.26/120-watchdog.patch | 29 +++
4 files changed, 236 insertions(+), 1 deletion(-)
create mode 100644 target/linux/atheros/files/drivers/watchdog/ar2315-wtd.c
create mode 100644 target/linux/atheros/patches-2.6.26/120-watchdog.patch
(limited to 'target/linux/atheros')
diff --git a/target/linux/atheros/config-2.6.26 b/target/linux/atheros/config-2.6.26
index a143817bb..0747fe96a 100644
--- a/target/linux/atheros/config-2.6.26
+++ b/target/linux/atheros/config-2.6.26
@@ -242,3 +242,4 @@ CONFIG_VIDEO_V4L1=m
CONFIG_VIDEO_V4L2=m
CONFIG_VIDEO_V4L2_COMMON=m
CONFIG_ZONE_DMA_FLAG=0
+CONFIG_ATHEROS_WDT=y
diff --git a/target/linux/atheros/files/arch/mips/atheros/ar5315/board.c b/target/linux/atheros/files/arch/mips/atheros/ar5315/board.c
index 96c6f8fef..f7c45bae2 100644
--- a/target/linux/atheros/files/arch/mips/atheros/ar5315/board.c
+++ b/target/linux/atheros/files/arch/mips/atheros/ar5315/board.c
@@ -109,7 +109,13 @@ static struct platform_device ar5315_gpio_leds = {
};
#endif
-static __initdata struct platform_device *ar5315_devs[5];
+static struct platform_device ar5315_wdt =
+{
+ .id = 0,
+ .name = "ar2315_wdt",
+};
+
+static __initdata struct platform_device *ar5315_devs[6];
static void *flash_regs;
@@ -243,6 +249,7 @@ int __init ar5315_init_devices(void)
ar5315_devs[dev++] = &ar5315_eth;
ar5315_devs[dev++] = &ar5315_wmac;
ar5315_devs[dev++] = &ar5315_spiflash;
+ ar5315_devs[dev++] = &ar5315_wdt;
#ifdef CONFIG_LEDS_GPIO
ar5315_led_data.num_leds = 0;
diff --git a/target/linux/atheros/files/drivers/watchdog/ar2315-wtd.c b/target/linux/atheros/files/drivers/watchdog/ar2315-wtd.c
new file mode 100644
index 000000000..1737b968f
--- /dev/null
+++ b/target/linux/atheros/files/drivers/watchdog/ar2315-wtd.c
@@ -0,0 +1,198 @@
+/*
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Copyright (C) 2008 John Crispin <blogic@openwrt.org>
+ * Based on EP93xx and ifxmips wdt driver
+ */
+
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/types.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <linux/fs.h>
+#include <linux/ioport.h>
+#include <linux/notifier.h>
+#include <linux/reboot.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <asm/system.h>
+#include <asm/addrspace.h>
+#include <ar531x.h>
+
+#define CLOCK_RATE 40000000
+#define HEARTBEAT(x) (x < 1 || x > 90)?(20):(x)
+
+static int wdt_timeout = 20;
+static int started = 0;
+static int in_use = 0;
+
+static void
+ar2315_wdt_enable(void)
+{
+ sysRegWrite(AR5315_WD, wdt_timeout * CLOCK_RATE);
+ sysRegWrite(AR5315_ISR, 0x80);
+}
+
+static ssize_t
+ar2315_wdt_write(struct file *file, const char __user *data, size_t len, loff_t *ppos)
+{
+ if(len)
+ ar2315_wdt_enable();
+ return len;
+}
+
+static int
+ar2315_wdt_open(struct inode *inode, struct file *file)
+{
+ if(in_use)
+ return -EBUSY;
+ ar2315_wdt_enable();
+ in_use = started = 1;
+ return nonseekable_open(inode, file);
+}
+
+static int
+ar2315_wdt_release(struct inode *inode, struct file *file)
+{
+ in_use = 0;
+ return 0;
+}
+
+static irqreturn_t
+ar2315_wdt_interrupt(int irq, void *dev_id)
+{
+ if(started)
+ {
+ printk(KERN_CRIT "watchdog expired, rebooting system\n");
+ sysRegWrite(AR5315_COLD_RESET, RESET_SYSTEM);
+ } else {
+ sysRegWrite(AR5315_WDC, 0);
+ sysRegWrite(AR5315_WD, 0);
+ sysRegWrite(AR5315_ISR, 0x80);
+ }
+ return IRQ_HANDLED;
+}
+
+static struct watchdog_info ident = {
+ .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING,
+ .identity = "ar2315 Watchdog",
+};
+
+static int
+ar2315_wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
+{
+ int new_wdt_timeout;
+ int ret = -ENOIOCTLCMD;
+
+ switch(cmd)
+ {
+ case WDIOC_GETSUPPORT:
+ ret = copy_to_user((struct watchdog_info __user *)arg, &ident, sizeof(ident)) ? -EFAULT : 0;
+ break;
+
+ case WDIOC_KEEPALIVE:
+ ar2315_wdt_enable();
+ ret = 0;
+ break;
+
+ case WDIOC_SETTIMEOUT:
+ if((ret = get_user(new_wdt_timeout, (int __user *)arg)))
+ break;
+ wdt_timeout = HEARTBEAT(new_wdt_timeout);
+ ar2315_wdt_enable();
+ break;
+
+ case WDIOC_GETTIMEOUT:
+ ret = put_user(wdt_timeout, (int __user *)arg);
+ break;
+ }
+ return ret;
+}
+
+static struct file_operations ar2315_wdt_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = ar2315_wdt_write,
+ .ioctl = ar2315_wdt_ioctl,
+ .open = ar2315_wdt_open,
+ .release = ar2315_wdt_release,
+};
+
+static struct miscdevice ar2315_wdt_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &ar2315_wdt_fops,
+};
+
+static int
+ar2315_wdt_probe(struct platform_device *dev)
+{
+ int ret = 0;
+
+ ar2315_wdt_enable();
+ ret = request_irq(AR531X_MISC_IRQ_WATCHDOG, ar2315_wdt_interrupt, IRQF_DISABLED, "ar2315_wdt", NULL);
+ if(ret)
+ {
+ printk(KERN_ERR "ar2315wdt: failed to register inetrrupt\n");
+ goto out;
+ }
+
+ ret = misc_register(&ar2315_wdt_miscdev);
+ if(ret)
+ printk(KERN_ERR "ar2315wdt: failed to register miscdev\n");
+
+out:
+ return ret;
+}
+
+static int
+ar2315_wdt_remove(struct platform_device *dev)
+{
+ misc_deregister(&ar2315_wdt_miscdev);
+ free_irq(AR531X_MISC_IRQ_WATCHDOG, NULL);
+ return 0;
+}
+
+static struct platform_driver ar2315_wdt_driver = {
+ .probe = ar2315_wdt_probe,
+ .remove = ar2315_wdt_remove,
+ .driver = {
+ .name = "ar2315_wdt",
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init
+init_ar2315_wdt(void)
+{
+ int ret = platform_driver_register(&ar2315_wdt_driver);
+ if(ret)
+ printk(KERN_INFO "ar2315_wdt: error registering platfom driver!");
+ return ret;
+}
+
+static void __exit
+exit_ar2315_wdt(void)
+{
+ platform_driver_unregister(&ar2315_wdt_driver);
+}
+
+module_init(init_ar2315_wdt);
+module_exit(exit_ar2315_wdt);
diff --git a/target/linux/atheros/patches-2.6.26/120-watchdog.patch b/target/linux/atheros/patches-2.6.26/120-watchdog.patch
new file mode 100644
index 000000000..64ac6871c
--- /dev/null
+++ b/target/linux/atheros/patches-2.6.26/120-watchdog.patch
@@ -0,0 +1,29 @@
+Index: linux-2.6.26.2/drivers/watchdog/Kconfig
+===================================================================
+--- linux-2.6.26.2.orig/drivers/watchdog/Kconfig 2008-08-14 16:54:30.000000000 +0200
++++ linux-2.6.26.2/drivers/watchdog/Kconfig 2008-08-14 16:55:40.000000000 +0200
+@@ -683,6 +683,12 @@
+ help
+ Hardware driver for the built-in watchdog timer on TXx9 MIPS SoCs.
+
++config ATHEROS_WDT
++ tristate "Atheros wisoc Watchdog Timer"
++ depends on ATHEROS
++ help
++ Hardware driver for the Atheros wisoc Watchdog Timer.
++
+ # PARISC Architecture
+
+ # POWERPC Architecture
+Index: linux-2.6.26.2/drivers/watchdog/Makefile
+===================================================================
+--- linux-2.6.26.2.orig/drivers/watchdog/Makefile 2008-08-14 16:55:44.000000000 +0200
++++ linux-2.6.26.2/drivers/watchdog/Makefile 2008-08-14 16:58:16.000000000 +0200
+@@ -97,6 +97,7 @@
+ obj-$(CONFIG_SIBYTE_WDOG) += sb_wdog.o
+ obj-$(CONFIG_AR7_WDT) += ar7_wdt.o
+ obj-$(CONFIG_TXX9_WDT) += txx9wdt.o
++obj-$(CONFIG_ATHEROS_WDT) += ar2315-wtd.o
+
+ # PARISC Architecture
+
--
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