[coldfire]: switch to 2.6.38

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@31546 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 338 insertions, 0 deletions

diff --git a/target/linux/coldfire/patches/031-Add-watchdog-driver-support-for-MCF5445x-and-MCF547x.patch b/target/linux/coldfire/patches/031-Add-watchdog-driver-support-for-MCF5445x-and-MCF547x.patch
new file mode 100644
index 0000000000..5362aa3334
--- /dev/null
+++ b/target/linux/coldfire/patches/031-Add-watchdog-driver-support-for-MCF5445x-and-MCF547x.patch
@@ -0,0 +1,338 @@
+From 42bf8a598049f6cb3c90b1f28a2f1b8daebe3de8 Mon Sep 17 00:00:00 2001
+From: Alison Wang <b18965@freescale.com>
+Date: Thu, 4 Aug 2011 09:59:47 +0800
+Subject: [PATCH 31/52] Add watchdog driver support for MCF5445x and MCF547x/MCF548x
+
+Add watchdog driver support for MCF5445x and MCF547x/MCF548x.
+
+Signed-off-by: Alison Wang <b18965@freescale.com>
+---
+ drivers/watchdog/Kconfig   |    9 ++
+ drivers/watchdog/Makefile  |    1 +
+ drivers/watchdog/mcf_wdt.c |  292 ++++++++++++++++++++++++++++++++++++++++++++
+ 3 files changed, 302 insertions(+), 0 deletions(-)
+ create mode 100644 drivers/watchdog/mcf_wdt.c
+
+--- a/drivers/watchdog/Kconfig
++++ b/drivers/watchdog/Kconfig
+@@ -974,6 +974,15 @@ config BCM63XX_WDT
+ 
+ # PARISC Architecture
+ 
++# ColdFire Architecture
++
++config COLDFIRE_WATCHDOG
++	tristate "ColdFire watchdog support"
++	depends on M547X_8X || M5445X || M5441X
++	help
++	  To compile this driver as a module, choose M here: the
++	  module will be called softdog.
++
+ # POWERPC Architecture
+ 
+ config GEF_WDT
+--- a/drivers/watchdog/Makefile
++++ b/drivers/watchdog/Makefile
+@@ -107,6 +107,7 @@ obj-$(CONFIG_SBC_EPX_C3_WATCHDOG) += sbc
+ 
+ # M68K Architecture
+ obj-$(CONFIG_M54xx_WATCHDOG) += m54xx_wdt.o
++obj-$(CONFIG_COLDFIRE_WATCHDOG) += mcf_wdt.o
+ 
+ # MIPS Architecture
+ obj-$(CONFIG_ATH79_WDT) += ath79_wdt.o
+--- /dev/null
++++ b/drivers/watchdog/mcf_wdt.c
+@@ -0,0 +1,292 @@
++/*
++ * drivers/watchdog/mcf_wdt.c
++ *
++ * Watchdog driver for ColdFire processors
++ *
++ * Copyright (C) 2006-2007, 2009-2011 Freescale Semiconductor, Inc.
++ * All Rights Reserved.
++ *
++ * Author: Shrek Wu<B16972@freesale.com>
++ *         ChengJu Cai<B22600@freesale.com>
++ *
++ * This file is licensed under  the terms of the GNU General Public
++ * License version 2. This program is licensed "as is" without any
++ * warranty of any kind, whether express or implied.
++ */
++
++#include <linux/module.h>
++#include <linux/moduleparam.h>
++#include <linux/types.h>
++#include <linux/kernel.h>
++#include <linux/fs.h>
++#include <linux/miscdevice.h>
++#include <linux/watchdog.h>
++#include <linux/init.h>
++#include <linux/bitops.h>
++
++#include <linux/uaccess.h>
++#include <asm/coldfire.h>
++#include <asm/mcfsim.h>
++
++static int nowayout;
++static unsigned int heartbeat = MCF_GPT_MAX_TIMEOUT;
++static unsigned long wdt_status;
++
++#define	WDT_IN_USE		0
++#define	WDT_OK_TO_CLOSE		1
++
++static unsigned long wdt_tick_rate;
++
++#ifdef CONFIG_M547X_8X
++static int
++wdt_enable(int time)
++{
++	if (time > 30 || time < 1)
++		return -EINVAL;
++
++	heartbeat = time;
++
++	MCF_GPT_GMS0 = 0;
++	MCF_GPT_GCIR0 =  MCF_GPT_GCIR_PRE(heartbeat * wdt_tick_rate) |
++				MCF_GPT_GCIR_CNT(0xffff);
++	MCF_GPT_GMS0 = MCF_GPT_GMS_OCPW(0xA5) | MCF_GPT_GMS_WDEN |
++				MCF_GPT_GMS_CE | MCF_GPT_GMS_TMS_GPIO;
++
++	return 0;
++}
++
++static void
++wdt_disable(void)
++{
++	MCF_GPT_GMS0 = 0;
++}
++
++static void
++wdt_keepalive(void)
++{
++	MCF_GPT_GMS0 = MCF_GPT_GMS_OCPW(0xA5) | MCF_GPT_GMS0;
++}
++
++#elif defined(CONFIG_M5445X) || defined(CONFIG_M5441X)
++
++/* Enable watchdog and set time-out */
++static int
++wdt_enable(int time)
++{
++	unsigned int sign = 0x01 << 31;
++	int i = 0, timeout_n = 31;
++	int max_timeout = sign / MCF_BUSCLK;
++	unsigned int count;
++
++	if (time > max_timeout || time < 1)
++		return -EINVAL;
++
++	count = time * MCF_BUSCLK;
++
++	for (i = 0; i < 31; i++) {
++		if (count & (sign >> i)) {
++			if ((count & (~(sign >> i))) == 0)
++				timeout_n = 31 - i;
++			else
++				timeout_n = 31 - i + 1;
++			break;
++		}
++	}
++
++	heartbeat = (unsigned int)(0x01 << timeout_n) / MCF_BUSCLK;
++
++	MCF_SCM_CWCR = MCF_SCM_CWCR_CWE
++			| MCF_SCM_CWCR_CWRI(0x02)
++			| MCF_SCM_CWCR_CWT(timeout_n);
++
++	return 0;
++}
++
++/* Disable the watchdog */
++static void
++wdt_disable(void)
++{
++	MCF_SCM_CWCR = 0x00;
++}
++
++/* Reset the watchdog timer counter */
++static void
++wdt_keepalive(void)
++{
++	MCF_SCM_CWSR = 0x55;
++	MCF_SCM_CWSR = 0xAA;
++}
++#endif
++
++static int
++mcf_wdt_open(struct inode *inode, struct file *file)
++{
++	int ret;
++	if (test_and_set_bit(WDT_IN_USE, &wdt_status))
++		return -EBUSY;
++
++	clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
++
++	ret = wdt_enable(heartbeat);
++	if (ret)
++		return ret;
++
++	return nonseekable_open(inode, file);
++}
++
++static ssize_t
++mcf_wdt_write(struct file *file, const char *data, size_t len, loff_t *ppos)
++{
++	if (len) {
++		if (!nowayout) {
++			size_t i;
++
++			clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
++
++			for (i = 0; i != len; i++) {
++				char c;
++
++				if (get_user(c, data + i))
++					return -EFAULT;
++				if (c == 'V')
++					set_bit(WDT_OK_TO_CLOSE, &wdt_status);
++			}
++		}
++		wdt_keepalive();
++	}
++
++	return len;
++}
++
++
++static struct watchdog_info ident = {
++	.options	= WDIOF_MAGICCLOSE | WDIOF_SETTIMEOUT |
++				WDIOF_KEEPALIVEPING,
++	.identity	= "Coldfire Watchdog",
++};
++
++static long
++mcf_wdt_ioctl(struct file *file, unsigned int cmd, unsigned long __user arg)
++{
++	long ret = -ENOIOCTLCMD;
++	int time = 0;
++
++	switch (cmd) {
++	case WDIOC_GETSUPPORT:
++		ret = copy_to_user((struct watchdog_info *)arg, &ident,
++				   sizeof(ident)) ? -EFAULT : 0;
++		break;
++
++	case WDIOC_GETSTATUS:
++		ret = put_user(0, (int *)arg);
++		break;
++
++	case WDIOC_GETBOOTSTATUS:
++		ret = put_user(0, (int *)arg);
++		break;
++
++	case WDIOC_SETTIMEOUT:
++		ret = get_user(time, (int *)arg);
++		if (ret)
++			break;
++
++		ret = wdt_enable(time);
++		if (ret)
++			break;
++		ret = put_user(heartbeat, (int *)arg);
++		break;
++
++	case WDIOC_GETTIMEOUT:
++		ret = put_user(heartbeat, (int *)arg);
++		break;
++
++	case WDIOC_KEEPALIVE:
++		wdt_keepalive();
++		ret = 0;
++		break;
++	}
++
++	return ret;
++}
++
++static int
++mcf_wdt_release(struct inode *inode, struct file *file)
++{
++	if (test_bit(WDT_OK_TO_CLOSE, &wdt_status)) {
++#ifdef CONFIG_M547X_8X
++		MCF_GPT_GCIR0 = (0x0A << 16) | 0x09;
++		MCF_GPT_GMS0 = MCF_GPT_GMS_OCPW(0xA5) | MCF_GPT_GMS0;
++#else
++		wdt_keepalive();
++#endif
++	} else {
++		printk(KERN_CRIT "WATCHDOG: Device closed unexpectdly\n");
++		wdt_disable();
++	}
++
++	clear_bit(WDT_IN_USE, &wdt_status);
++	clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
++
++#ifdef CONFIG_M547X_8X
++	/*disable the XLB priority, otherwise the watchdog reset may fail*/
++	MCF_XARB_PRIEN = 0;
++	/* Also disable the PCI, Ugly! But there is issue between PCI and
++	 * watchdog. Otherwise the watchdog reset may fail, only valuable
++	 * for testing!
++	 */
++	MCF_SPCR &= ~0x02;
++	asm("tpf");
++#endif
++
++	return 0;
++}
++
++
++static const struct file_operations mcf_wdt_fops = {
++	.owner		= THIS_MODULE,
++	.llseek		= no_llseek,
++	.write		= mcf_wdt_write,
++	.unlocked_ioctl	= mcf_wdt_ioctl,
++	.open		= mcf_wdt_open,
++	.release	= mcf_wdt_release,
++};
++
++static struct miscdevice mcf_wdt_miscdev = {
++	.minor		= WATCHDOG_MINOR,
++	.name		= "watchdog",
++	.fops		= &mcf_wdt_fops,
++};
++
++static int __init mcf_wdt_init(void)
++{
++	wdt_tick_rate = MCF_BUSCLK/0xffff;
++#ifdef CONFIG_WATCHDOG_NOWAYOUT
++	nowayout = 1;
++#else
++	nowayout = 0;
++#endif
++	printk(KERN_INFO "ColdFire watchdog driver is loaded.\n");
++
++	return misc_register(&mcf_wdt_miscdev);
++}
++
++static void __exit mcf_wdt_exit(void)
++{
++	misc_deregister(&mcf_wdt_miscdev);
++}
++
++module_init(mcf_wdt_init);
++module_exit(mcf_wdt_exit);
++
++MODULE_AUTHOR("Deepak Saxena");
++MODULE_DESCRIPTION("ColdFire Watchdog");
++
++module_param(heartbeat, int, 0);
++MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds (default 60s)");
++
++module_param(nowayout, int, 0);
++MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started");
++
++MODULE_LICENSE("GPL");
++MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
++