[PATCH] OMAP: Add Watchdog driver support
Add Texas Instruments (TI) OMAP1/2 (http://www.ti.com/omap) based processors, like OMAP1610/1710/242x. [akpm@osdl.org: cleanups] Cc: <gdavis@mvista.com> Cc: "Komal Shah" <komal_shah802003@yahoo.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Komal Shah
Linus Torvalds
parent
f1b7c5f459
commit
7768a13c25
4 changed files with 463 additions and 0 deletions
|
|
@ -165,6 +165,13 @@ config EP93XX_WATCHDOG
|
||||||
To compile this driver as a module, choose M here: the
|
To compile this driver as a module, choose M here: the
|
||||||
module will be called ep93xx_wdt.
|
module will be called ep93xx_wdt.
|
||||||
|
|
||||||
|
config OMAP_WATCHDOG
|
||||||
|
tristate "OMAP Watchdog"
|
||||||
|
depends on WATCHDOG && (ARCH_OMAP16XX || ARCH_OMAP24XX)
|
||||||
|
help
|
||||||
|
Support for TI OMAP1610/OMAP1710/OMAP2420 watchdog. Say 'Y' here to
|
||||||
|
enable the OMAP1610/OMAP1710 watchdog timer.
|
||||||
|
|
||||||
# X86 (i386 + ia64 + x86_64) Architecture
|
# X86 (i386 + ia64 + x86_64) Architecture
|
||||||
|
|
||||||
config ACQUIRE_WDT
|
config ACQUIRE_WDT
|
||||||
|
|
|
||||||
|
|
@ -24,6 +24,7 @@ obj-$(CONFIG_USBPCWATCHDOG) += pcwd_usb.o
|
||||||
|
|
||||||
# ARM Architecture
|
# ARM Architecture
|
||||||
obj-$(CONFIG_AT91_WATCHDOG) += at91_wdt.o
|
obj-$(CONFIG_AT91_WATCHDOG) += at91_wdt.o
|
||||||
|
obj-$(CONFIG_OMAP_WATCHDOG) += omap_wdt.o
|
||||||
obj-$(CONFIG_21285_WATCHDOG) += wdt285.o
|
obj-$(CONFIG_21285_WATCHDOG) += wdt285.o
|
||||||
obj-$(CONFIG_977_WATCHDOG) += wdt977.o
|
obj-$(CONFIG_977_WATCHDOG) += wdt977.o
|
||||||
obj-$(CONFIG_IXP2000_WATCHDOG) += ixp2000_wdt.o
|
obj-$(CONFIG_IXP2000_WATCHDOG) += ixp2000_wdt.o
|
||||||
|
|
|
||||||
391
drivers/char/watchdog/omap_wdt.c
Normal file
391
drivers/char/watchdog/omap_wdt.c
Normal file
|
|
@ -0,0 +1,391 @@
|
||||||
|
/*
|
||||||
|
* linux/drivers/char/watchdog/omap_wdt.c
|
||||||
|
*
|
||||||
|
* Watchdog driver for the TI OMAP 16xx & 24xx 32KHz (non-secure) watchdog
|
||||||
|
*
|
||||||
|
* Author: MontaVista Software, Inc.
|
||||||
|
* <gdavis@mvista.com> or <source@mvista.com>
|
||||||
|
*
|
||||||
|
* 2003 (c) MontaVista Software, Inc. 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.
|
||||||
|
*
|
||||||
|
* History:
|
||||||
|
*
|
||||||
|
* 20030527: George G. Davis <gdavis@mvista.com>
|
||||||
|
* Initially based on linux-2.4.19-rmk7-pxa1/drivers/char/sa1100_wdt.c
|
||||||
|
* (c) Copyright 2000 Oleg Drokin <green@crimea.edu>
|
||||||
|
* Based on SoftDog driver by Alan Cox <alan@redhat.com>
|
||||||
|
*
|
||||||
|
* Copyright (c) 2004 Texas Instruments.
|
||||||
|
* 1. Modified to support OMAP1610 32-KHz watchdog timer
|
||||||
|
* 2. Ported to 2.6 kernel
|
||||||
|
*
|
||||||
|
* Copyright (c) 2005 David Brownell
|
||||||
|
* Use the driver model and standard identifiers; handle bigger timeouts.
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include <linux/module.h>
|
||||||
|
#include <linux/config.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 <linux/err.h>
|
||||||
|
#include <linux/platform_device.h>
|
||||||
|
#include <linux/moduleparam.h>
|
||||||
|
#include <linux/clk.h>
|
||||||
|
|
||||||
|
#include <asm/io.h>
|
||||||
|
#include <asm/uaccess.h>
|
||||||
|
#include <asm/hardware.h>
|
||||||
|
#include <asm/bitops.h>
|
||||||
|
|
||||||
|
#include <asm/arch/prcm.h>
|
||||||
|
|
||||||
|
#include "omap_wdt.h"
|
||||||
|
|
||||||
|
static unsigned timer_margin;
|
||||||
|
module_param(timer_margin, uint, 0);
|
||||||
|
MODULE_PARM_DESC(timer_margin, "initial watchdog timeout (in seconds)");
|
||||||
|
|
||||||
|
static int omap_wdt_users;
|
||||||
|
static struct clk *armwdt_ck = NULL;
|
||||||
|
static struct clk *mpu_wdt_ick = NULL;
|
||||||
|
static struct clk *mpu_wdt_fck = NULL;
|
||||||
|
|
||||||
|
static unsigned int wdt_trgr_pattern = 0x1234;
|
||||||
|
|
||||||
|
static void omap_wdt_ping(void)
|
||||||
|
{
|
||||||
|
/* wait for posted write to complete */
|
||||||
|
while ((omap_readl(OMAP_WATCHDOG_WPS)) & 0x08)
|
||||||
|
cpu_relax();
|
||||||
|
wdt_trgr_pattern = ~wdt_trgr_pattern;
|
||||||
|
omap_writel(wdt_trgr_pattern, (OMAP_WATCHDOG_TGR));
|
||||||
|
/* wait for posted write to complete */
|
||||||
|
while ((omap_readl(OMAP_WATCHDOG_WPS)) & 0x08)
|
||||||
|
cpu_relax();
|
||||||
|
/* reloaded WCRR from WLDR */
|
||||||
|
}
|
||||||
|
|
||||||
|
static void omap_wdt_enable(void)
|
||||||
|
{
|
||||||
|
/* Sequence to enable the watchdog */
|
||||||
|
omap_writel(0xBBBB, OMAP_WATCHDOG_SPR);
|
||||||
|
while ((omap_readl(OMAP_WATCHDOG_WPS)) & 0x10)
|
||||||
|
cpu_relax();
|
||||||
|
omap_writel(0x4444, OMAP_WATCHDOG_SPR);
|
||||||
|
while ((omap_readl(OMAP_WATCHDOG_WPS)) & 0x10)
|
||||||
|
cpu_relax();
|
||||||
|
}
|
||||||
|
|
||||||
|
static void omap_wdt_disable(void)
|
||||||
|
{
|
||||||
|
/* sequence required to disable watchdog */
|
||||||
|
omap_writel(0xAAAA, OMAP_WATCHDOG_SPR); /* TIMER_MODE */
|
||||||
|
while (omap_readl(OMAP_WATCHDOG_WPS) & 0x10)
|
||||||
|
cpu_relax();
|
||||||
|
omap_writel(0x5555, OMAP_WATCHDOG_SPR); /* TIMER_MODE */
|
||||||
|
while (omap_readl(OMAP_WATCHDOG_WPS) & 0x10)
|
||||||
|
cpu_relax();
|
||||||
|
}
|
||||||
|
|
||||||
|
static void omap_wdt_adjust_timeout(unsigned new_timeout)
|
||||||
|
{
|
||||||
|
if (new_timeout < TIMER_MARGIN_MIN)
|
||||||
|
new_timeout = TIMER_MARGIN_DEFAULT;
|
||||||
|
if (new_timeout > TIMER_MARGIN_MAX)
|
||||||
|
new_timeout = TIMER_MARGIN_MAX;
|
||||||
|
timer_margin = new_timeout;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void omap_wdt_set_timeout(void)
|
||||||
|
{
|
||||||
|
u32 pre_margin = GET_WLDR_VAL(timer_margin);
|
||||||
|
|
||||||
|
/* just count up at 32 KHz */
|
||||||
|
while (omap_readl(OMAP_WATCHDOG_WPS) & 0x04)
|
||||||
|
cpu_relax();
|
||||||
|
omap_writel(pre_margin, OMAP_WATCHDOG_LDR);
|
||||||
|
while (omap_readl(OMAP_WATCHDOG_WPS) & 0x04)
|
||||||
|
cpu_relax();
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Allow only one task to hold it open
|
||||||
|
*/
|
||||||
|
|
||||||
|
static int omap_wdt_open(struct inode *inode, struct file *file)
|
||||||
|
{
|
||||||
|
if (test_and_set_bit(1, (unsigned long *)&omap_wdt_users))
|
||||||
|
return -EBUSY;
|
||||||
|
|
||||||
|
if (cpu_is_omap16xx())
|
||||||
|
clk_enable(armwdt_ck); /* Enable the clock */
|
||||||
|
|
||||||
|
if (cpu_is_omap24xx()) {
|
||||||
|
clk_enable(mpu_wdt_ick); /* Enable the interface clock */
|
||||||
|
clk_enable(mpu_wdt_fck); /* Enable the functional clock */
|
||||||
|
}
|
||||||
|
|
||||||
|
/* initialize prescaler */
|
||||||
|
while (omap_readl(OMAP_WATCHDOG_WPS) & 0x01)
|
||||||
|
cpu_relax();
|
||||||
|
omap_writel((1 << 5) | (PTV << 2), OMAP_WATCHDOG_CNTRL);
|
||||||
|
while (omap_readl(OMAP_WATCHDOG_WPS) & 0x01)
|
||||||
|
cpu_relax();
|
||||||
|
|
||||||
|
omap_wdt_set_timeout();
|
||||||
|
omap_wdt_enable();
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int omap_wdt_release(struct inode *inode, struct file *file)
|
||||||
|
{
|
||||||
|
/*
|
||||||
|
* Shut off the timer unless NOWAYOUT is defined.
|
||||||
|
*/
|
||||||
|
#ifndef CONFIG_WATCHDOG_NOWAYOUT
|
||||||
|
omap_wdt_disable();
|
||||||
|
|
||||||
|
if (cpu_is_omap16xx()) {
|
||||||
|
clk_disable(armwdt_ck); /* Disable the clock */
|
||||||
|
clk_put(armwdt_ck);
|
||||||
|
armwdt_ck = NULL;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (cpu_is_omap24xx()) {
|
||||||
|
clk_disable(mpu_wdt_ick); /* Disable the clock */
|
||||||
|
clk_disable(mpu_wdt_fck); /* Disable the clock */
|
||||||
|
clk_put(mpu_wdt_ick);
|
||||||
|
clk_put(mpu_wdt_fck);
|
||||||
|
mpu_wdt_ick = NULL;
|
||||||
|
mpu_wdt_fck = NULL;
|
||||||
|
}
|
||||||
|
#else
|
||||||
|
printk(KERN_CRIT "omap_wdt: Unexpected close, not stopping!\n");
|
||||||
|
#endif
|
||||||
|
omap_wdt_users = 0;
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static ssize_t
|
||||||
|
omap_wdt_write(struct file *file, const char __user *data,
|
||||||
|
size_t len, loff_t *ppos)
|
||||||
|
{
|
||||||
|
/* Refresh LOAD_TIME. */
|
||||||
|
if (len)
|
||||||
|
omap_wdt_ping();
|
||||||
|
return len;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int
|
||||||
|
omap_wdt_ioctl(struct inode *inode, struct file *file,
|
||||||
|
unsigned int cmd, unsigned long arg)
|
||||||
|
{
|
||||||
|
int new_margin;
|
||||||
|
static struct watchdog_info ident = {
|
||||||
|
.identity = "OMAP Watchdog",
|
||||||
|
.options = WDIOF_SETTIMEOUT,
|
||||||
|
.firmware_version = 0,
|
||||||
|
};
|
||||||
|
|
||||||
|
switch (cmd) {
|
||||||
|
default:
|
||||||
|
return -ENOIOCTLCMD;
|
||||||
|
case WDIOC_GETSUPPORT:
|
||||||
|
return copy_to_user((struct watchdog_info __user *)arg, &ident,
|
||||||
|
sizeof(ident));
|
||||||
|
case WDIOC_GETSTATUS:
|
||||||
|
return put_user(0, (int __user *)arg);
|
||||||
|
case WDIOC_GETBOOTSTATUS:
|
||||||
|
if (cpu_is_omap16xx())
|
||||||
|
return put_user(omap_readw(ARM_SYSST),
|
||||||
|
(int __user *)arg);
|
||||||
|
if (cpu_is_omap24xx())
|
||||||
|
return put_user(omap_prcm_get_reset_sources(),
|
||||||
|
(int __user *)arg);
|
||||||
|
case WDIOC_KEEPALIVE:
|
||||||
|
omap_wdt_ping();
|
||||||
|
return 0;
|
||||||
|
case WDIOC_SETTIMEOUT:
|
||||||
|
if (get_user(new_margin, (int __user *)arg))
|
||||||
|
return -EFAULT;
|
||||||
|
omap_wdt_adjust_timeout(new_margin);
|
||||||
|
|
||||||
|
omap_wdt_disable();
|
||||||
|
omap_wdt_set_timeout();
|
||||||
|
omap_wdt_enable();
|
||||||
|
|
||||||
|
omap_wdt_ping();
|
||||||
|
/* Fall */
|
||||||
|
case WDIOC_GETTIMEOUT:
|
||||||
|
return put_user(timer_margin, (int __user *)arg);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
static struct file_operations omap_wdt_fops = {
|
||||||
|
.owner = THIS_MODULE,
|
||||||
|
.write = omap_wdt_write,
|
||||||
|
.ioctl = omap_wdt_ioctl,
|
||||||
|
.open = omap_wdt_open,
|
||||||
|
.release = omap_wdt_release,
|
||||||
|
};
|
||||||
|
|
||||||
|
static struct miscdevice omap_wdt_miscdev = {
|
||||||
|
.minor = WATCHDOG_MINOR,
|
||||||
|
.name = "watchdog",
|
||||||
|
.fops = &omap_wdt_fops
|
||||||
|
};
|
||||||
|
|
||||||
|
static int __init omap_wdt_probe(struct platform_device *pdev)
|
||||||
|
{
|
||||||
|
struct resource *res, *mem;
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
/* reserve static register mappings */
|
||||||
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
||||||
|
if (!res)
|
||||||
|
return -ENOENT;
|
||||||
|
|
||||||
|
mem = request_mem_region(res->start, res->end - res->start + 1,
|
||||||
|
pdev->name);
|
||||||
|
if (mem == NULL)
|
||||||
|
return -EBUSY;
|
||||||
|
|
||||||
|
platform_set_drvdata(pdev, mem);
|
||||||
|
|
||||||
|
omap_wdt_users = 0;
|
||||||
|
|
||||||
|
if (cpu_is_omap16xx()) {
|
||||||
|
armwdt_ck = clk_get(&pdev->dev, "armwdt_ck");
|
||||||
|
if (IS_ERR(armwdt_ck)) {
|
||||||
|
ret = PTR_ERR(armwdt_ck);
|
||||||
|
armwdt_ck = NULL;
|
||||||
|
goto fail;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
if (cpu_is_omap24xx()) {
|
||||||
|
mpu_wdt_ick = clk_get(&pdev->dev, "mpu_wdt_ick");
|
||||||
|
if (IS_ERR(mpu_wdt_ick)) {
|
||||||
|
ret = PTR_ERR(mpu_wdt_ick);
|
||||||
|
mpu_wdt_ick = NULL;
|
||||||
|
goto fail;
|
||||||
|
}
|
||||||
|
mpu_wdt_fck = clk_get(&pdev->dev, "mpu_wdt_fck");
|
||||||
|
if (IS_ERR(mpu_wdt_fck)) {
|
||||||
|
ret = PTR_ERR(mpu_wdt_fck);
|
||||||
|
mpu_wdt_fck = NULL;
|
||||||
|
goto fail;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
omap_wdt_disable();
|
||||||
|
omap_wdt_adjust_timeout(timer_margin);
|
||||||
|
|
||||||
|
omap_wdt_miscdev.dev = &pdev->dev;
|
||||||
|
ret = misc_register(&omap_wdt_miscdev);
|
||||||
|
if (ret)
|
||||||
|
goto fail;
|
||||||
|
|
||||||
|
pr_info("OMAP Watchdog Timer: initial timeout %d sec\n", timer_margin);
|
||||||
|
|
||||||
|
/* autogate OCP interface clock */
|
||||||
|
omap_writel(0x01, OMAP_WATCHDOG_SYS_CONFIG);
|
||||||
|
return 0;
|
||||||
|
|
||||||
|
fail:
|
||||||
|
if (armwdt_ck)
|
||||||
|
clk_put(armwdt_ck);
|
||||||
|
if (mpu_wdt_ick)
|
||||||
|
clk_put(mpu_wdt_ick);
|
||||||
|
if (mpu_wdt_fck)
|
||||||
|
clk_put(mpu_wdt_fck);
|
||||||
|
release_resource(mem);
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void omap_wdt_shutdown(struct platform_device *pdev)
|
||||||
|
{
|
||||||
|
omap_wdt_disable();
|
||||||
|
}
|
||||||
|
|
||||||
|
static int omap_wdt_remove(struct platform_device *pdev)
|
||||||
|
{
|
||||||
|
struct resource *mem = platform_get_drvdata(pdev);
|
||||||
|
misc_deregister(&omap_wdt_miscdev);
|
||||||
|
release_resource(mem);
|
||||||
|
if (armwdt_ck)
|
||||||
|
clk_put(armwdt_ck);
|
||||||
|
if (mpu_wdt_ick)
|
||||||
|
clk_put(mpu_wdt_ick);
|
||||||
|
if (mpu_wdt_fck)
|
||||||
|
clk_put(mpu_wdt_fck);
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
#ifdef CONFIG_PM
|
||||||
|
|
||||||
|
/* REVISIT ... not clear this is the best way to handle system suspend; and
|
||||||
|
* it's very inappropriate for selective device suspend (e.g. suspending this
|
||||||
|
* through sysfs rather than by stopping the watchdog daemon). Also, this
|
||||||
|
* may not play well enough with NOWAYOUT...
|
||||||
|
*/
|
||||||
|
|
||||||
|
static int omap_wdt_suspend(struct platform_device *pdev, pm_message_t state)
|
||||||
|
{
|
||||||
|
if (omap_wdt_users)
|
||||||
|
omap_wdt_disable();
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int omap_wdt_resume(struct platform_device *pdev)
|
||||||
|
{
|
||||||
|
if (omap_wdt_users) {
|
||||||
|
omap_wdt_enable();
|
||||||
|
omap_wdt_ping();
|
||||||
|
}
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
#else
|
||||||
|
#define omap_wdt_suspend NULL
|
||||||
|
#define omap_wdt_resume NULL
|
||||||
|
#endif
|
||||||
|
|
||||||
|
static struct platform_driver omap_wdt_driver = {
|
||||||
|
.probe = omap_wdt_probe,
|
||||||
|
.remove = omap_wdt_remove,
|
||||||
|
.shutdown = omap_wdt_shutdown,
|
||||||
|
.suspend = omap_wdt_suspend,
|
||||||
|
.resume = omap_wdt_resume,
|
||||||
|
.driver = {
|
||||||
|
.owner = THIS_MODULE,
|
||||||
|
.name = "omap_wdt",
|
||||||
|
},
|
||||||
|
};
|
||||||
|
|
||||||
|
static int __init omap_wdt_init(void)
|
||||||
|
{
|
||||||
|
return platform_driver_register(&omap_wdt_driver);
|
||||||
|
}
|
||||||
|
|
||||||
|
static void __exit omap_wdt_exit(void)
|
||||||
|
{
|
||||||
|
platform_driver_unregister(&omap_wdt_driver);
|
||||||
|
}
|
||||||
|
|
||||||
|
module_init(omap_wdt_init);
|
||||||
|
module_exit(omap_wdt_exit);
|
||||||
|
|
||||||
|
MODULE_AUTHOR("George G. Davis");
|
||||||
|
MODULE_LICENSE("GPL");
|
||||||
|
MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
|
||||||
64
drivers/char/watchdog/omap_wdt.h
Normal file
64
drivers/char/watchdog/omap_wdt.h
Normal file
|
|
@ -0,0 +1,64 @@
|
||||||
|
/*
|
||||||
|
* linux/drivers/char/watchdog/omap_wdt.h
|
||||||
|
*
|
||||||
|
* BRIEF MODULE DESCRIPTION
|
||||||
|
* OMAP Watchdog timer register definitions
|
||||||
|
*
|
||||||
|
* Copyright (C) 2004 Texas Instruments.
|
||||||
|
*
|
||||||
|
* 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 SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
|
||||||
|
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
||||||
|
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
|
||||||
|
* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||||
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
||||||
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
|
||||||
|
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
|
||||||
|
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||||||
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
||||||
|
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||||
|
*
|
||||||
|
* 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.,
|
||||||
|
* 675 Mass Ave, Cambridge, MA 02139, USA.
|
||||||
|
*/
|
||||||
|
|
||||||
|
#ifndef _OMAP_WATCHDOG_H
|
||||||
|
#define _OMAP_WATCHDOG_H
|
||||||
|
|
||||||
|
#define OMAP1610_WATCHDOG_BASE 0xfffeb000
|
||||||
|
#define OMAP2420_WATCHDOG_BASE 0x48022000 /*WDT Timer 2 */
|
||||||
|
|
||||||
|
#ifdef CONFIG_ARCH_OMAP24XX
|
||||||
|
#define OMAP_WATCHDOG_BASE OMAP2420_WATCHDOG_BASE
|
||||||
|
#else
|
||||||
|
#define OMAP_WATCHDOG_BASE OMAP1610_WATCHDOG_BASE
|
||||||
|
#define RM_RSTST_WKUP 0
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#define OMAP_WATCHDOG_REV (OMAP_WATCHDOG_BASE + 0x00)
|
||||||
|
#define OMAP_WATCHDOG_SYS_CONFIG (OMAP_WATCHDOG_BASE + 0x10)
|
||||||
|
#define OMAP_WATCHDOG_STATUS (OMAP_WATCHDOG_BASE + 0x14)
|
||||||
|
#define OMAP_WATCHDOG_CNTRL (OMAP_WATCHDOG_BASE + 0x24)
|
||||||
|
#define OMAP_WATCHDOG_CRR (OMAP_WATCHDOG_BASE + 0x28)
|
||||||
|
#define OMAP_WATCHDOG_LDR (OMAP_WATCHDOG_BASE + 0x2c)
|
||||||
|
#define OMAP_WATCHDOG_TGR (OMAP_WATCHDOG_BASE + 0x30)
|
||||||
|
#define OMAP_WATCHDOG_WPS (OMAP_WATCHDOG_BASE + 0x34)
|
||||||
|
#define OMAP_WATCHDOG_SPR (OMAP_WATCHDOG_BASE + 0x48)
|
||||||
|
|
||||||
|
/* Using the prescaler, the OMAP watchdog could go for many
|
||||||
|
* months before firing. These limits work without scaling,
|
||||||
|
* with the 60 second default assumed by most tools and docs.
|
||||||
|
*/
|
||||||
|
#define TIMER_MARGIN_MAX (24 * 60 * 60) /* 1 day */
|
||||||
|
#define TIMER_MARGIN_DEFAULT 60 /* 60 secs */
|
||||||
|
#define TIMER_MARGIN_MIN 1
|
||||||
|
|
||||||
|
#define PTV 0 /* prescale */
|
||||||
|
#define GET_WLDR_VAL(secs) (0xffffffff - ((secs) * (32768/(1<<PTV))) + 1)
|
||||||
|
|
||||||
|
#endif /* _OMAP_WATCHDOG_H */
|
||||||
Loading…
Reference in a new issue