mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2025-04-21 12:27:27 +03:00
[ubicom32]: move new files out from platform support patch
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@19815 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
kaloz
630
target/linux/ubicom32/files/drivers/watchdog/ubi32_wdt.c
Normal file
630
target/linux/ubicom32/files/drivers/watchdog/ubi32_wdt.c
Normal file
@@ -0,0 +1,630 @@
|
||||
/*
|
||||
* drivers/watchdog/ubi32_wdt.c
|
||||
* Ubicom32 Watchdog Driver
|
||||
*
|
||||
* Originally based on softdog.c
|
||||
* Copyright 2006-2007 Analog Devices Inc.
|
||||
* Copyright 2006-2007 Michele d'Amico
|
||||
* Copyright 1996 Alan Cox <alan@lxorguk.ukuu.org.uk>
|
||||
* (C) Copyright 2009, Ubicom, Inc.
|
||||
*
|
||||
* This file is part of the Ubicom32 Linux Kernel Port.
|
||||
*
|
||||
* The Ubicom32 Linux Kernel Port 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.
|
||||
*
|
||||
* The Ubicom32 Linux Kernel Port 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 the Ubicom32 Linux Kernel Port. If not,
|
||||
* see <http://www.gnu.org/licenses/>.
|
||||
*
|
||||
* Ubicom32 implementation derived from (with many thanks):
|
||||
* arch/m68knommu
|
||||
* arch/blackfin
|
||||
* arch/parisc
|
||||
*/
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/moduleparam.h>
|
||||
#include <linux/types.h>
|
||||
#include <linux/timer.h>
|
||||
#include <linux/miscdevice.h>
|
||||
#include <linux/watchdog.h>
|
||||
#include <linux/fs.h>
|
||||
#include <linux/notifier.h>
|
||||
#include <linux/reboot.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/uaccess.h>
|
||||
#include <asm/ip5000.h>
|
||||
|
||||
#define WATCHDOG_NAME "ubi32-wdt"
|
||||
#define PFX WATCHDOG_NAME ": "
|
||||
|
||||
#define OSC1_FREQ 12000000
|
||||
#define WATCHDOG_SEC_TO_CYC(x) (OSC1_FREQ * (x))
|
||||
#define WATCHDOG_MAX_SEC (0xffffffff / OSC1_FREQ)
|
||||
|
||||
#define MIN_PROCESSOR_ADDRESS 0x03000000
|
||||
|
||||
static DEFINE_SPINLOCK(ubi32_wdt_spinlock);
|
||||
|
||||
#define WATCHDOG_TIMEOUT 20
|
||||
|
||||
#if defined(CONFIG_WATCHDOG_NOWAYOUT)
|
||||
#define WATCHDOG_NOWAYOUT 1
|
||||
#else
|
||||
#define WATCHDOG_NOWAYOUT 0
|
||||
#endif
|
||||
|
||||
static unsigned int timeout = WATCHDOG_TIMEOUT;
|
||||
static int nowayout = WATCHDOG_NOWAYOUT;
|
||||
static struct watchdog_info ubi32_wdt_info;
|
||||
static unsigned long open_check;
|
||||
static char expect_close;
|
||||
|
||||
#if !defined(CONFIG_SMP)
|
||||
#define UBI32_WDT_LOCK(lock, flags) local_irq_save(flags)
|
||||
#define UBI32_WDT_UNLOCK(lock, flags) local_irq_restore(flags)
|
||||
#define UBI32_WDT_LOCK_CHECK()
|
||||
#else
|
||||
#define UBI32_WDT_LOCK(lock, flags) spin_lock_irqsave((lock), (flags));
|
||||
#define UBI32_WDT_UNLOCK(lock, flags) spin_unlock_irqrestore((lock), (flags));
|
||||
#define UBI32_WDT_LOCK_CHECK() BUG_ON(!spin_is_locked(&ubi32_wdt_spinlock));
|
||||
#endif
|
||||
|
||||
/*
|
||||
* ubi32_wdt_remaining()
|
||||
* Return the approximate number of seconds remaining
|
||||
*/
|
||||
static int ubi32_wdt_remaining(void)
|
||||
{
|
||||
int compare;
|
||||
int curr;
|
||||
|
||||
UBI32_WDT_LOCK_CHECK();
|
||||
|
||||
ubicom32_write_reg(&UBICOM32_IO_TIMER->tkey, TIMER_TKEYVAL);
|
||||
compare = ubicom32_read_reg(&UBICOM32_IO_TIMER->wdcom);
|
||||
curr = ubicom32_read_reg(&UBICOM32_IO_TIMER->mptval);
|
||||
ubicom32_write_reg(&UBICOM32_IO_TIMER->tkey, 0);
|
||||
return (compare - curr) / OSC1_FREQ;
|
||||
|
||||
}
|
||||
|
||||
/*
|
||||
* ubi32_wdt_keepalive()
|
||||
* Keep the Userspace Watchdog Alive
|
||||
*
|
||||
* The Userspace watchdog got a KeepAlive: schedule the next timeout.
|
||||
*/
|
||||
static int ubi32_wdt_keepalive(void)
|
||||
{
|
||||
UBI32_WDT_LOCK_CHECK();
|
||||
ubicom32_write_reg(&UBICOM32_IO_TIMER->tkey, TIMER_TKEYVAL);
|
||||
ubicom32_write_reg(&UBICOM32_IO_TIMER->wdcom,
|
||||
ubicom32_read_reg(&UBICOM32_IO_TIMER->mptval)
|
||||
+ WATCHDOG_SEC_TO_CYC(timeout));
|
||||
ubicom32_write_reg(&UBICOM32_IO_TIMER->tkey, 0);
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* ubi32_wdt_stop()
|
||||
* Stop the on-chip Watchdog
|
||||
*/
|
||||
static int ubi32_wdt_stop(void)
|
||||
{
|
||||
UBI32_WDT_LOCK_CHECK();
|
||||
ubicom32_write_reg(&UBICOM32_IO_TIMER->tkey, TIMER_TKEYVAL);
|
||||
ubicom32_write_reg(&UBICOM32_IO_TIMER->wdcfg, TIMER_WATCHDOG_DISABLE);
|
||||
ubicom32_write_reg(&UBICOM32_IO_TIMER->tkey, 0);
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* ubi32_wdt_start()
|
||||
* Start the on-chip Watchdog
|
||||
*/
|
||||
static int ubi32_wdt_start(void)
|
||||
{
|
||||
UBI32_WDT_LOCK_CHECK();
|
||||
ubicom32_write_reg(&UBICOM32_IO_TIMER->tkey, TIMER_TKEYVAL);
|
||||
ubicom32_write_reg(&UBICOM32_IO_TIMER->wdcom,
|
||||
ubicom32_read_reg(&UBICOM32_IO_TIMER->mptval)
|
||||
+ WATCHDOG_SEC_TO_CYC(timeout));
|
||||
ubicom32_write_reg(&UBICOM32_IO_TIMER->wdcfg, ~TIMER_WATCHDOG_DISABLE);
|
||||
ubicom32_write_reg(&UBICOM32_IO_TIMER->tkey, 0);
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* ubi32_wdt_running()
|
||||
* Return true if the watchdog is configured
|
||||
*/
|
||||
static int ubi32_wdt_running(void)
|
||||
{
|
||||
int enabled;
|
||||
|
||||
UBI32_WDT_LOCK_CHECK();
|
||||
ubicom32_write_reg(&UBICOM32_IO_TIMER->tkey, TIMER_TKEYVAL);
|
||||
enabled = ubicom32_read_reg(&UBICOM32_IO_TIMER->wdcfg) == ~TIMER_WATCHDOG_DISABLE;
|
||||
ubicom32_write_reg(&UBICOM32_IO_TIMER->tkey, 0);
|
||||
return enabled;
|
||||
}
|
||||
|
||||
/*
|
||||
* ubi32_wdt_set_timeout()
|
||||
* Set the Userspace Watchdog timeout
|
||||
*
|
||||
* - @t: new timeout value (in seconds)
|
||||
*/
|
||||
static int ubi32_wdt_set_timeout(unsigned long t)
|
||||
{
|
||||
UBI32_WDT_LOCK_CHECK();
|
||||
|
||||
if (t > WATCHDOG_MAX_SEC) {
|
||||
printk(KERN_WARNING PFX "request to large: %ld [1-%d] sec)\n", t, WATCHDOG_MAX_SEC);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
/*
|
||||
* If we are running, then reset the time value so
|
||||
* that the new value has an immediate effect.
|
||||
*/
|
||||
timeout = t;
|
||||
if (ubi32_wdt_running()) {
|
||||
ubi32_wdt_keepalive();
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* ubi32_wdt_open()
|
||||
* Open the Device
|
||||
*/
|
||||
static int ubi32_wdt_open(struct inode *inode, struct file *file)
|
||||
{
|
||||
unsigned long flags;
|
||||
|
||||
if (test_and_set_bit(0, &open_check))
|
||||
return -EBUSY;
|
||||
|
||||
if (nowayout)
|
||||
__module_get(THIS_MODULE);
|
||||
|
||||
spin_lock_irqsave(&ubi32_wdt_spinlock, flags);
|
||||
ubi32_wdt_start();
|
||||
spin_unlock_irqrestore(&ubi32_wdt_spinlock, flags);
|
||||
|
||||
return nonseekable_open(inode, file);
|
||||
}
|
||||
|
||||
/*
|
||||
* ubi32_wdt_close()
|
||||
* Close the Device
|
||||
*/
|
||||
static int ubi32_wdt_release(struct inode *inode, struct file *file)
|
||||
{
|
||||
unsigned long flags;
|
||||
|
||||
/*
|
||||
* If we don't expect a close, then the watchdog continues
|
||||
* even though the device is closed. The caller will have
|
||||
* a full timeout value to reopen the device and continue
|
||||
* stroking it.
|
||||
*/
|
||||
if (expect_close != 42) {
|
||||
printk(KERN_CRIT PFX
|
||||
"Unexpected close, not stopping watchdog!\n");
|
||||
spin_lock_irqsave(&ubi32_wdt_spinlock, flags);
|
||||
ubi32_wdt_keepalive();
|
||||
spin_unlock_irqrestore(&ubi32_wdt_spinlock, flags);
|
||||
} else {
|
||||
spin_lock_irqsave(&ubi32_wdt_spinlock, flags);
|
||||
ubi32_wdt_stop();
|
||||
spin_unlock_irqrestore(&ubi32_wdt_spinlock, flags);
|
||||
}
|
||||
|
||||
expect_close = 0;
|
||||
clear_bit(0, &open_check);
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* ubi32_wdt_write()
|
||||
* Write to Device
|
||||
*
|
||||
* If the user writes nothing, nothing happens.
|
||||
* If the user writes a V, then we expect a close and allow a release.
|
||||
* If the user writes anything else, it is ignored.
|
||||
*/
|
||||
static ssize_t ubi32_wdt_write(struct file *file, const char __user *data,
|
||||
size_t len, loff_t *ppos)
|
||||
{
|
||||
size_t i;
|
||||
unsigned long flags;
|
||||
|
||||
/*
|
||||
* Every write resets the expect_close. The last write
|
||||
* must be a V to allow shutdown on close.
|
||||
*/
|
||||
expect_close = 0;
|
||||
|
||||
/*
|
||||
* Empty writes still ping.
|
||||
*/
|
||||
if (!len) {
|
||||
goto ping;
|
||||
}
|
||||
|
||||
/*
|
||||
* If nowayout is set, it does not matter if the caller
|
||||
* is trying to send the magic 'V' we will not allow a
|
||||
* close to stop us.
|
||||
*/
|
||||
if (nowayout) {
|
||||
goto ping;
|
||||
}
|
||||
|
||||
/*
|
||||
* See if the program wrote a 'V' and if so disable
|
||||
* the watchdog on release.
|
||||
*/
|
||||
for (i = 0; i < len; i++) {
|
||||
char c;
|
||||
if (get_user(c, data + i)) {
|
||||
return -EFAULT;
|
||||
}
|
||||
|
||||
if (c == 'V') {
|
||||
expect_close = 42;
|
||||
}
|
||||
}
|
||||
|
||||
ping:
|
||||
spin_lock_irqsave(&ubi32_wdt_spinlock, flags);
|
||||
ubi32_wdt_keepalive();
|
||||
spin_unlock_irqrestore(&ubi32_wdt_spinlock, flags);
|
||||
return len;
|
||||
}
|
||||
|
||||
/*
|
||||
* ubi32_wdt_ioctl()
|
||||
* Query the watchdog device.
|
||||
*
|
||||
* Query basic information from the device or ping it, as outlined by the
|
||||
* watchdog API.
|
||||
*/
|
||||
static long ubi32_wdt_ioctl(struct file *file,
|
||||
unsigned int cmd, unsigned long arg)
|
||||
{
|
||||
void __user *argp = (void __user *)arg;
|
||||
int __user *p = argp;
|
||||
|
||||
switch (cmd) {
|
||||
case WDIOC_GETSUPPORT:
|
||||
if (copy_to_user(argp, &ubi32_wdt_info, sizeof(ubi32_wdt_info))) {
|
||||
return -EFAULT;
|
||||
}
|
||||
return 0;
|
||||
|
||||
case WDIOC_GETSTATUS: {
|
||||
unsigned long flags;
|
||||
int running;
|
||||
|
||||
spin_lock_irqsave(&ubi32_wdt_spinlock, flags);
|
||||
running = ubi32_wdt_running();
|
||||
spin_unlock_irqrestore(&ubi32_wdt_spinlock, flags);
|
||||
return running;
|
||||
}
|
||||
|
||||
case WDIOC_GETBOOTSTATUS:
|
||||
return ubicom32_get_reset_reason();
|
||||
|
||||
case WDIOC_SETOPTIONS: {
|
||||
unsigned long flags;
|
||||
int options, ret = -EINVAL;
|
||||
|
||||
/*
|
||||
* The sample application does not pass a pointer
|
||||
* but directly passes a value of 1 or 2; however
|
||||
* all of the implementations (and thus probably
|
||||
* the real applications) pass a pointer to a value.
|
||||
*
|
||||
* It should be noted that WDIOC_SETOPTIONS is defined as
|
||||
* _IOR(WATCHDOG_IOCTL_BASE, 4, int), which means
|
||||
* that it should be an int and NOT a pointer.
|
||||
*
|
||||
* TODO: Examine this code for future chips.
|
||||
* TODO: Report the sample code defect.
|
||||
*/
|
||||
if ((int)p < MIN_PROCESSOR_ADDRESS) {
|
||||
options = (int)p;
|
||||
} else {
|
||||
if (get_user(options, p))
|
||||
return -EFAULT;
|
||||
}
|
||||
|
||||
spin_lock_irqsave(&ubi32_wdt_spinlock, flags);
|
||||
if (options & WDIOS_DISABLECARD) {
|
||||
ubi32_wdt_stop();
|
||||
ret = 0;
|
||||
}
|
||||
if (options & WDIOS_ENABLECARD) {
|
||||
ubi32_wdt_start();
|
||||
ret = 0;
|
||||
}
|
||||
spin_unlock_irqrestore(&ubi32_wdt_spinlock, flags);
|
||||
return ret;
|
||||
}
|
||||
|
||||
case WDIOC_KEEPALIVE: {
|
||||
unsigned long flags;
|
||||
|
||||
spin_lock_irqsave(&ubi32_wdt_spinlock, flags);
|
||||
ubi32_wdt_keepalive();
|
||||
spin_unlock_irqrestore(&ubi32_wdt_spinlock, flags);
|
||||
return 0;
|
||||
}
|
||||
|
||||
case WDIOC_SETTIMEOUT: {
|
||||
int new_timeout;
|
||||
unsigned long flags;
|
||||
int ret = 0;
|
||||
|
||||
if (get_user(new_timeout, p))
|
||||
return -EFAULT;
|
||||
|
||||
spin_lock_irqsave(&ubi32_wdt_spinlock, flags);
|
||||
ret = ubi32_wdt_set_timeout(new_timeout);
|
||||
spin_unlock_irqrestore(&ubi32_wdt_spinlock, flags);
|
||||
return ret;
|
||||
|
||||
}
|
||||
|
||||
case WDIOC_GETTIMEOUT:
|
||||
return put_user(timeout, p);
|
||||
|
||||
case WDIOC_GETTIMELEFT: {
|
||||
unsigned long flags;
|
||||
int remaining = 0;
|
||||
|
||||
spin_lock_irqsave(&ubi32_wdt_spinlock, flags);
|
||||
remaining = ubi32_wdt_remaining();
|
||||
spin_unlock_irqrestore(&ubi32_wdt_spinlock, flags);
|
||||
return put_user(remaining, p);
|
||||
}
|
||||
|
||||
default:
|
||||
return -ENOTTY;
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* ubi32_wdt_notify_sys()
|
||||
* Notification callback function for system events.
|
||||
*
|
||||
* Turn off the watchdog during a SYS_DOWN or SYS_HALT.
|
||||
*/
|
||||
static int ubi32_wdt_notify_sys(struct notifier_block *this,
|
||||
unsigned long code, void *unused)
|
||||
{
|
||||
if (code == SYS_DOWN || code == SYS_HALT) {
|
||||
unsigned long flags;
|
||||
|
||||
spin_lock_irqsave(&ubi32_wdt_spinlock, flags);
|
||||
ubi32_wdt_stop();
|
||||
spin_unlock_irqrestore(&ubi32_wdt_spinlock, flags);
|
||||
}
|
||||
|
||||
return NOTIFY_DONE;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_PM
|
||||
static int state_before_suspend;
|
||||
|
||||
/*
|
||||
* ubi32_wdt_suspend()
|
||||
* suspend the watchdog
|
||||
*
|
||||
* Remember if the watchdog was running and stop it.
|
||||
*/
|
||||
static int ubi32_wdt_suspend(struct platform_device *pdev, pm_message_t state)
|
||||
{
|
||||
unsigned long flags;
|
||||
spin_lock_irqsave(&ubi32_wdt_spinlock, flags);
|
||||
state_before_suspend = ubi32_wdt_running();
|
||||
ubi32_wdt_stop();
|
||||
spin_unlock_irqrestore(&ubi32_wdt_spinlock, flags);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* ubi32_wdt_resume()
|
||||
* Resume the watchdog
|
||||
*
|
||||
* If the watchdog was running, turn it back on.
|
||||
*/
|
||||
static int ubi32_wdt_resume(struct platform_device *pdev)
|
||||
{
|
||||
if (state_before_suspend) {
|
||||
unsigned long flags;
|
||||
spin_lock_irqsave(&ubi32_wdt_spinlock, flags);
|
||||
ubi32_wdt_set_timeout(timeout);
|
||||
ubi32_wdt_start();
|
||||
spin_unlock_irqrestore(&ubi32_wdt_spinlock, flags);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
#else
|
||||
# define ubi32_wdt_suspend NULL
|
||||
# define ubi32_wdt_resume NULL
|
||||
#endif
|
||||
|
||||
static const struct file_operations ubi32_wdt_fops = {
|
||||
.owner = THIS_MODULE,
|
||||
.llseek = no_llseek,
|
||||
.write = ubi32_wdt_write,
|
||||
.unlocked_ioctl = ubi32_wdt_ioctl,
|
||||
.open = ubi32_wdt_open,
|
||||
.release = ubi32_wdt_release,
|
||||
};
|
||||
|
||||
static struct miscdevice ubi32_wdt_miscdev = {
|
||||
.minor = WATCHDOG_MINOR,
|
||||
.name = "watchdog",
|
||||
.fops = &ubi32_wdt_fops,
|
||||
};
|
||||
|
||||
static struct watchdog_info ubi32_wdt_info = {
|
||||
.identity = "Ubicom32 Watchdog",
|
||||
.options = WDIOF_SETTIMEOUT |
|
||||
WDIOF_KEEPALIVEPING |
|
||||
WDIOF_MAGICCLOSE,
|
||||
};
|
||||
|
||||
static struct notifier_block ubi32_wdt_notifier = {
|
||||
.notifier_call = ubi32_wdt_notify_sys,
|
||||
};
|
||||
|
||||
/*
|
||||
* ubi32_wdt_probe()
|
||||
* Probe/register the watchdog module
|
||||
*
|
||||
* Registers the misc device and notifier handler. Actual device
|
||||
* initialization is handled by ubi32_wdt_open().
|
||||
*/
|
||||
static int __devinit ubi32_wdt_probe(struct platform_device *pdev)
|
||||
{
|
||||
int ret;
|
||||
|
||||
ret = register_reboot_notifier(&ubi32_wdt_notifier);
|
||||
if (ret) {
|
||||
printk(KERN_ERR PFX
|
||||
"cannot register reboot notifier (err=%d)\n", ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
ret = misc_register(&ubi32_wdt_miscdev);
|
||||
if (ret) {
|
||||
printk(KERN_ERR PFX
|
||||
"cannot register miscdev on minor=%d (err=%d)\n",
|
||||
WATCHDOG_MINOR, ret);
|
||||
unregister_reboot_notifier(&ubi32_wdt_notifier);
|
||||
return ret;
|
||||
}
|
||||
|
||||
printk(KERN_INFO PFX "initialized: timeout=%d sec (nowayout=%d)\n",
|
||||
timeout, nowayout);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* ubi32_wdt_remove()
|
||||
* Uninstall the module
|
||||
*
|
||||
* Unregisters the misc device and notifier handler. Actual device
|
||||
* deinitialization is handled by ubi32_wdt_close().
|
||||
*/
|
||||
static int __devexit ubi32_wdt_remove(struct platform_device *pdev)
|
||||
{
|
||||
misc_deregister(&ubi32_wdt_miscdev);
|
||||
unregister_reboot_notifier(&ubi32_wdt_notifier);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct platform_device *ubi32_wdt_device;
|
||||
|
||||
static struct platform_driver ubi32_wdt_driver = {
|
||||
.probe = ubi32_wdt_probe,
|
||||
.remove = __devexit_p(ubi32_wdt_remove),
|
||||
.suspend = ubi32_wdt_suspend,
|
||||
.resume = ubi32_wdt_resume,
|
||||
.driver = {
|
||||
.name = WATCHDOG_NAME,
|
||||
.owner = THIS_MODULE,
|
||||
},
|
||||
};
|
||||
|
||||
/*
|
||||
* ubi32_wdt_init()
|
||||
* Initialize the watchdog.
|
||||
*
|
||||
* Checks the module params and registers the platform device & driver.
|
||||
* Real work is in the platform probe function.
|
||||
*/
|
||||
static int __init ubi32_wdt_init(void)
|
||||
{
|
||||
unsigned long flags;
|
||||
int ret;
|
||||
|
||||
/*
|
||||
* Check that the timeout value is within range
|
||||
*/
|
||||
spin_lock_irqsave(&ubi32_wdt_spinlock, flags);
|
||||
ret = ubi32_wdt_set_timeout(timeout);
|
||||
spin_unlock_irqrestore(&ubi32_wdt_spinlock, flags);
|
||||
if (ret) {
|
||||
return ret;
|
||||
}
|
||||
|
||||
/*
|
||||
* Since this is an on-chip device and needs no board-specific
|
||||
* resources, we'll handle all the platform device stuff here.
|
||||
*/
|
||||
ret = platform_driver_register(&ubi32_wdt_driver);
|
||||
if (ret) {
|
||||
printk(KERN_ERR PFX "unable to register driver\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
ubi32_wdt_device = platform_device_register_simple(WATCHDOG_NAME, -1, NULL, 0);
|
||||
if (IS_ERR(ubi32_wdt_device)) {
|
||||
printk(KERN_ERR PFX "unable to register device\n");
|
||||
platform_driver_unregister(&ubi32_wdt_driver);
|
||||
return PTR_ERR(ubi32_wdt_device);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* ubi32_wdt_exit()
|
||||
* Deinitialize module
|
||||
*
|
||||
* Back out the platform device & driver steps. Real work is in the
|
||||
* platform remove function.
|
||||
*/
|
||||
static void __exit ubi32_wdt_exit(void)
|
||||
{
|
||||
platform_device_unregister(ubi32_wdt_device);
|
||||
platform_driver_unregister(&ubi32_wdt_driver);
|
||||
}
|
||||
|
||||
module_init(ubi32_wdt_init);
|
||||
module_exit(ubi32_wdt_exit);
|
||||
|
||||
MODULE_AUTHOR("Sol Kavy<sol@ubicom.com>");
|
||||
MODULE_DESCRIPTION("Ubicom32 Watchdog Device Driver");
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
|
||||
|
||||
module_param(timeout, uint, 0);
|
||||
MODULE_PARM_DESC(timeout,
|
||||
"Watchdog timeout in seconds. (1<=timeout<=((2^32)/SCLK), default="
|
||||
__MODULE_STRING(WATCHDOG_TIMEOUT) ")");
|
||||
|
||||
module_param(nowayout, int, 0);
|
||||
MODULE_PARM_DESC(nowayout,
|
||||
"Watchdog cannot be stopped once started (default="
|
||||
__MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
|
||||
Reference in New Issue
Block a user