linux/atheros: add preliminary 2.6.37 kernel support (thank you nbd, florian)

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@23928 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 228 insertions, 0 deletions

diff --git a/target/linux/atheros/patches-2.6.37/130-watchdog.patch b/target/linux/atheros/patches-2.6.37/130-watchdog.patch
new file mode 100644
index 0000000000..aaa162e820
--- /dev/null
+++ b/target/linux/atheros/patches-2.6.37/130-watchdog.patch
@@ -0,0 +1,228 @@
+--- /dev/null
++++ b/drivers/watchdog/ar2315-wtd.c
+@@ -0,0 +1,200 @@
++/*
++ * 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 <ar231x_platform.h>
++#include <ar2315_regs.h>
++#include <ar231x.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)
++{
++	ar231x_write_reg(AR2315_WD, wdt_timeout * CLOCK_RATE);
++	ar231x_write_reg(AR2315_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");
++		emergency_restart();
++	} else {
++		ar231x_write_reg(AR2315_WDC, 0);
++		ar231x_write_reg(AR2315_WD, 0);
++		ar231x_write_reg(AR2315_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);
+--- a/drivers/watchdog/Kconfig
++++ b/drivers/watchdog/Kconfig
+@@ -927,6 +927,12 @@ config BCM63XX_WDT
+ 	  To compile this driver as a loadable module, choose M here.
+ 	  The module will be called bcm63xx_wdt.
+ 
++config ATHEROS_WDT
++	tristate "Atheros wisoc Watchdog Timer"
++	depends on ATHEROS_AR231X
++	help
++	  Hardware driver for the Atheros wisoc Watchdog Timer.
++
+ # PARISC Architecture
+ 
+ # POWERPC Architecture
+--- a/drivers/watchdog/Makefile
++++ b/drivers/watchdog/Makefile
+@@ -116,6 +116,7 @@ obj-$(CONFIG_WDT_MTX1) += mtx-1_wdt.o
+ obj-$(CONFIG_PNX833X_WDT) += pnx833x_wdt.o
+ obj-$(CONFIG_SIBYTE_WDOG) += sb_wdog.o
+ obj-$(CONFIG_AR7_WDT) += ar7_wdt.o
++obj-$(CONFIG_ATHEROS_WDT) += ar2315-wtd.o
+ obj-$(CONFIG_TXX9_WDT) += txx9wdt.o
+ obj-$(CONFIG_OCTEON_WDT) += octeon-wdt.o
+ octeon-wdt-y := octeon-wdt-main.o octeon-wdt-nmi.o