summaryrefslogtreecommitdiffstats
path: root/drivers/watchdog/w83977f_wdt.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/watchdog/w83977f_wdt.c')
-rw-r--r--drivers/watchdog/w83977f_wdt.c239
1 files changed, 118 insertions, 121 deletions
diff --git a/drivers/watchdog/w83977f_wdt.c b/drivers/watchdog/w83977f_wdt.c
index b209bcd7f789..2525da5080ca 100644
--- a/drivers/watchdog/w83977f_wdt.c
+++ b/drivers/watchdog/w83977f_wdt.c
@@ -26,10 +26,10 @@
#include <linux/watchdog.h>
#include <linux/notifier.h>
#include <linux/reboot.h>
+#include <linux/uaccess.h>
+#include <linux/io.h>
-#include <asm/io.h>
#include <asm/system.h>
-#include <asm/uaccess.h>
#define WATCHDOG_VERSION "1.00"
#define WATCHDOG_NAME "W83977F WDT"
@@ -53,13 +53,17 @@ static char expect_close;
static DEFINE_SPINLOCK(spinlock);
module_param(timeout, int, 0);
-MODULE_PARM_DESC(timeout,"Watchdog timeout in seconds (15..7635), default=" __MODULE_STRING(DEFAULT_TIMEOUT) ")");
+MODULE_PARM_DESC(timeout,
+ "Watchdog timeout in seconds (15..7635), default="
+ __MODULE_STRING(DEFAULT_TIMEOUT) ")");
module_param(testmode, int, 0);
-MODULE_PARM_DESC(testmode,"Watchdog testmode (1 = no reboot), default=0");
+MODULE_PARM_DESC(testmode, "Watchdog testmode (1 = no reboot), default=0");
static int nowayout = WATCHDOG_NOWAYOUT;
module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+MODULE_PARM_DESC(nowayout,
+ "Watchdog cannot be stopped once started (default="
+ __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
/*
* Start the watchdog
@@ -72,8 +76,8 @@ static int wdt_start(void)
spin_lock_irqsave(&spinlock, flags);
/* Unlock the SuperIO chip */
- outb_p(UNLOCK_DATA,IO_INDEX_PORT);
- outb_p(UNLOCK_DATA,IO_INDEX_PORT);
+ outb_p(UNLOCK_DATA, IO_INDEX_PORT);
+ outb_p(UNLOCK_DATA, IO_INDEX_PORT);
/*
* Select device Aux2 (device=8) to set watchdog regs F2, F3 and F4.
@@ -81,50 +85,49 @@ static int wdt_start(void)
* F3 is set to enable watchdog LED blink at timeout.
* F4 is used to just clear the TIMEOUT'ed state (bit 0).
*/
- outb_p(DEVICE_REGISTER,IO_INDEX_PORT);
- outb_p(0x08,IO_DATA_PORT);
- outb_p(0xF2,IO_INDEX_PORT);
- outb_p(timeoutW,IO_DATA_PORT);
- outb_p(0xF3,IO_INDEX_PORT);
- outb_p(0x08,IO_DATA_PORT);
- outb_p(0xF4,IO_INDEX_PORT);
- outb_p(0x00,IO_DATA_PORT);
+ outb_p(DEVICE_REGISTER, IO_INDEX_PORT);
+ outb_p(0x08, IO_DATA_PORT);
+ outb_p(0xF2, IO_INDEX_PORT);
+ outb_p(timeoutW, IO_DATA_PORT);
+ outb_p(0xF3, IO_INDEX_PORT);
+ outb_p(0x08, IO_DATA_PORT);
+ outb_p(0xF4, IO_INDEX_PORT);
+ outb_p(0x00, IO_DATA_PORT);
/* Set device Aux2 active */
- outb_p(0x30,IO_INDEX_PORT);
- outb_p(0x01,IO_DATA_PORT);
+ outb_p(0x30, IO_INDEX_PORT);
+ outb_p(0x01, IO_DATA_PORT);
- /*
+ /*
* Select device Aux1 (dev=7) to set GP16 as the watchdog output
* (in reg E6) and GP13 as the watchdog LED output (in reg E3).
* Map GP16 at pin 119.
* In test mode watch the bit 0 on F4 to indicate "triggered" or
* check watchdog LED on SBC.
*/
- outb_p(DEVICE_REGISTER,IO_INDEX_PORT);
- outb_p(0x07,IO_DATA_PORT);
- if (!testmode)
- {
+ outb_p(DEVICE_REGISTER, IO_INDEX_PORT);
+ outb_p(0x07, IO_DATA_PORT);
+ if (!testmode) {
unsigned pin_map;
- outb_p(0xE6,IO_INDEX_PORT);
- outb_p(0x0A,IO_DATA_PORT);
- outb_p(0x2C,IO_INDEX_PORT);
+ outb_p(0xE6, IO_INDEX_PORT);
+ outb_p(0x0A, IO_DATA_PORT);
+ outb_p(0x2C, IO_INDEX_PORT);
pin_map = inb_p(IO_DATA_PORT);
pin_map |= 0x10;
pin_map &= ~(0x20);
- outb_p(0x2C,IO_INDEX_PORT);
- outb_p(pin_map,IO_DATA_PORT);
+ outb_p(0x2C, IO_INDEX_PORT);
+ outb_p(pin_map, IO_DATA_PORT);
}
- outb_p(0xE3,IO_INDEX_PORT);
- outb_p(0x08,IO_DATA_PORT);
+ outb_p(0xE3, IO_INDEX_PORT);
+ outb_p(0x08, IO_DATA_PORT);
/* Set device Aux1 active */
- outb_p(0x30,IO_INDEX_PORT);
- outb_p(0x01,IO_DATA_PORT);
+ outb_p(0x30, IO_INDEX_PORT);
+ outb_p(0x01, IO_DATA_PORT);
/* Lock the SuperIO chip */
- outb_p(LOCK_DATA,IO_INDEX_PORT);
+ outb_p(LOCK_DATA, IO_INDEX_PORT);
spin_unlock_irqrestore(&spinlock, flags);
@@ -144,42 +147,41 @@ static int wdt_stop(void)
spin_lock_irqsave(&spinlock, flags);
/* Unlock the SuperIO chip */
- outb_p(UNLOCK_DATA,IO_INDEX_PORT);
- outb_p(UNLOCK_DATA,IO_INDEX_PORT);
+ outb_p(UNLOCK_DATA, IO_INDEX_PORT);
+ outb_p(UNLOCK_DATA, IO_INDEX_PORT);
- /*
+ /*
* Select device Aux2 (device=8) to set watchdog regs F2, F3 and F4.
* F2 is reset to its default value (watchdog timer disabled).
* F3 is reset to its default state.
* F4 clears the TIMEOUT'ed state (bit 0) - back to default.
*/
- outb_p(DEVICE_REGISTER,IO_INDEX_PORT);
- outb_p(0x08,IO_DATA_PORT);
- outb_p(0xF2,IO_INDEX_PORT);
- outb_p(0xFF,IO_DATA_PORT);
- outb_p(0xF3,IO_INDEX_PORT);
- outb_p(0x00,IO_DATA_PORT);
- outb_p(0xF4,IO_INDEX_PORT);
- outb_p(0x00,IO_DATA_PORT);
- outb_p(0xF2,IO_INDEX_PORT);
- outb_p(0x00,IO_DATA_PORT);
+ outb_p(DEVICE_REGISTER, IO_INDEX_PORT);
+ outb_p(0x08, IO_DATA_PORT);
+ outb_p(0xF2, IO_INDEX_PORT);
+ outb_p(0xFF, IO_DATA_PORT);
+ outb_p(0xF3, IO_INDEX_PORT);
+ outb_p(0x00, IO_DATA_PORT);
+ outb_p(0xF4, IO_INDEX_PORT);
+ outb_p(0x00, IO_DATA_PORT);
+ outb_p(0xF2, IO_INDEX_PORT);
+ outb_p(0x00, IO_DATA_PORT);
/*
- * Select device Aux1 (dev=7) to set GP16 (in reg E6) and
+ * Select device Aux1 (dev=7) to set GP16 (in reg E6) and
* Gp13 (in reg E3) as inputs.
*/
- outb_p(DEVICE_REGISTER,IO_INDEX_PORT);
- outb_p(0x07,IO_DATA_PORT);
- if (!testmode)
- {
- outb_p(0xE6,IO_INDEX_PORT);
- outb_p(0x01,IO_DATA_PORT);
+ outb_p(DEVICE_REGISTER, IO_INDEX_PORT);
+ outb_p(0x07, IO_DATA_PORT);
+ if (!testmode) {
+ outb_p(0xE6, IO_INDEX_PORT);
+ outb_p(0x01, IO_DATA_PORT);
}
- outb_p(0xE3,IO_INDEX_PORT);
- outb_p(0x01,IO_DATA_PORT);
+ outb_p(0xE3, IO_INDEX_PORT);
+ outb_p(0x01, IO_DATA_PORT);
/* Lock the SuperIO chip */
- outb_p(LOCK_DATA,IO_INDEX_PORT);
+ outb_p(LOCK_DATA, IO_INDEX_PORT);
spin_unlock_irqrestore(&spinlock, flags);
@@ -200,17 +202,17 @@ static int wdt_keepalive(void)
spin_lock_irqsave(&spinlock, flags);
/* Unlock the SuperIO chip */
- outb_p(UNLOCK_DATA,IO_INDEX_PORT);
- outb_p(UNLOCK_DATA,IO_INDEX_PORT);
+ outb_p(UNLOCK_DATA, IO_INDEX_PORT);
+ outb_p(UNLOCK_DATA, IO_INDEX_PORT);
/* Select device Aux2 (device=8) to kick watchdog reg F2 */
- outb_p(DEVICE_REGISTER,IO_INDEX_PORT);
- outb_p(0x08,IO_DATA_PORT);
- outb_p(0xF2,IO_INDEX_PORT);
- outb_p(timeoutW,IO_DATA_PORT);
+ outb_p(DEVICE_REGISTER, IO_INDEX_PORT);
+ outb_p(0x08, IO_DATA_PORT);
+ outb_p(0xF2, IO_INDEX_PORT);
+ outb_p(timeoutW, IO_DATA_PORT);
/* Lock the SuperIO chip */
- outb_p(LOCK_DATA,IO_INDEX_PORT);
+ outb_p(LOCK_DATA, IO_INDEX_PORT);
spin_unlock_irqrestore(&spinlock, flags);
@@ -227,7 +229,7 @@ static int wdt_set_timeout(int t)
/*
* Convert seconds to watchdog counter time units, rounding up.
- * On PCM-5335 watchdog units are 30 seconds/step with 15 sec startup
+ * On PCM-5335 watchdog units are 30 seconds/step with 15 sec startup
* value. This information is supplied in the PCM-5335 manual and was
* checked by me on a real board. This is a bit strange because W83977f
* datasheet says counter unit is in minutes!
@@ -241,7 +243,7 @@ static int wdt_set_timeout(int t)
return -EINVAL;
/*
- * timeout is the timeout in seconds,
+ * timeout is the timeout in seconds,
* timeoutW is the timeout in watchdog counter units.
*/
timeoutW = tmrval;
@@ -261,17 +263,17 @@ static int wdt_get_status(int *status)
spin_lock_irqsave(&spinlock, flags);
/* Unlock the SuperIO chip */
- outb_p(UNLOCK_DATA,IO_INDEX_PORT);
- outb_p(UNLOCK_DATA,IO_INDEX_PORT);
+ outb_p(UNLOCK_DATA, IO_INDEX_PORT);
+ outb_p(UNLOCK_DATA, IO_INDEX_PORT);
/* Select device Aux2 (device=8) to read watchdog reg F4 */
- outb_p(DEVICE_REGISTER,IO_INDEX_PORT);
- outb_p(0x08,IO_DATA_PORT);
- outb_p(0xF4,IO_INDEX_PORT);
+ outb_p(DEVICE_REGISTER, IO_INDEX_PORT);
+ outb_p(0x08, IO_DATA_PORT);
+ outb_p(0xF4, IO_INDEX_PORT);
new_status = inb_p(IO_DATA_PORT);
/* Lock the SuperIO chip */
- outb_p(LOCK_DATA,IO_INDEX_PORT);
+ outb_p(LOCK_DATA, IO_INDEX_PORT);
spin_unlock_irqrestore(&spinlock, flags);
@@ -290,7 +292,7 @@ static int wdt_get_status(int *status)
static int wdt_open(struct inode *inode, struct file *file)
{
/* If the watchdog is alive we don't need to start it again */
- if( test_and_set_bit(0, &timer_alive) )
+ if (test_and_set_bit(0, &timer_alive))
return -EBUSY;
if (nowayout)
@@ -306,13 +308,13 @@ static int wdt_release(struct inode *inode, struct file *file)
* Shut off the timer.
* Lock it in if it's a module and we set nowayout
*/
- if (expect_close == 42)
- {
+ if (expect_close == 42) {
wdt_stop();
clear_bit(0, &timer_alive);
} else {
wdt_keepalive();
- printk(KERN_CRIT PFX "unexpected close, not stopping watchdog!\n");
+ printk(KERN_CRIT PFX
+ "unexpected close, not stopping watchdog!\n");
}
expect_close = 0;
return 0;
@@ -333,24 +335,22 @@ static ssize_t wdt_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
/* See if we got the magic character 'V' and reload the timer */
- if(count)
- {
- if (!nowayout)
- {
+ if (count) {
+ if (!nowayout) {
size_t ofs;
- /* note: just in case someone wrote the magic character long ago */
+ /* note: just in case someone wrote the
+ magic character long ago */
expect_close = 0;
- /* scan to see whether or not we got the magic character */
- for(ofs = 0; ofs != count; ofs++)
- {
+ /* scan to see whether or not we got the
+ magic character */
+ for (ofs = 0; ofs != count; ofs++) {
char c;
if (get_user(c, buf + ofs))
return -EFAULT;
- if (c == 'V') {
+ if (c == 'V')
expect_close = 42;
- }
}
}
@@ -377,8 +377,7 @@ static struct watchdog_info ident = {
.identity = WATCHDOG_NAME,
};
-static int wdt_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
+static long wdt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
int status;
int new_options, retval = -EINVAL;
@@ -390,13 +389,10 @@ static int wdt_ioctl(struct inode *inode, struct file *file,
uarg.i = (int __user *)arg;
- switch(cmd)
- {
- default:
- return -ENOTTY;
-
+ switch (cmd) {
case WDIOC_GETSUPPORT:
- return copy_to_user(uarg.ident, &ident, sizeof(ident)) ? -EFAULT : 0;
+ return copy_to_user(uarg.ident, &ident,
+ sizeof(ident)) ? -EFAULT : 0;
case WDIOC_GETSTATUS:
wdt_get_status(&status);
@@ -405,12 +401,8 @@ static int wdt_ioctl(struct inode *inode, struct file *file,
case WDIOC_GETBOOTSTATUS:
return put_user(0, uarg.i);
- case WDIOC_KEEPALIVE:
- wdt_keepalive();
- return 0;
-
case WDIOC_SETOPTIONS:
- if (get_user (new_options, uarg.i))
+ if (get_user(new_options, uarg.i))
return -EFAULT;
if (new_options & WDIOS_DISABLECARD) {
@@ -425,6 +417,10 @@ static int wdt_ioctl(struct inode *inode, struct file *file,
return retval;
+ case WDIOC_KEEPALIVE:
+ wdt_keepalive();
+ return 0;
+
case WDIOC_SETTIMEOUT:
if (get_user(new_timeout, uarg.i))
return -EFAULT;
@@ -438,29 +434,30 @@ static int wdt_ioctl(struct inode *inode, struct file *file,
case WDIOC_GETTIMEOUT:
return put_user(timeout, uarg.i);
+ default:
+ return -ENOTTY;
+
}
}
static int wdt_notify_sys(struct notifier_block *this, unsigned long code,
void *unused)
{
- if (code==SYS_DOWN || code==SYS_HALT)
+ if (code == SYS_DOWN || code == SYS_HALT)
wdt_stop();
return NOTIFY_DONE;
}
-static const struct file_operations wdt_fops=
-{
+static const struct file_operations wdt_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.write = wdt_write,
- .ioctl = wdt_ioctl,
+ .unlocked_ioctl = wdt_ioctl,
.open = wdt_open,
.release = wdt_release,
};
-static struct miscdevice wdt_miscdev=
-{
+static struct miscdevice wdt_miscdev = {
.minor = WATCHDOG_MINOR,
.name = "watchdog",
.fops = &wdt_fops,
@@ -474,20 +471,20 @@ static int __init w83977f_wdt_init(void)
{
int rc;
- printk(KERN_INFO PFX DRIVER_VERSION);
+ printk(KERN_INFO PFX DRIVER_VERSION);
/*
- * Check that the timeout value is within it's range ;
+ * Check that the timeout value is within it's range;
* if not reset to the default
*/
if (wdt_set_timeout(timeout)) {
wdt_set_timeout(DEFAULT_TIMEOUT);
- printk(KERN_INFO PFX "timeout value must be 15<=timeout<=7635, using %d\n",
- DEFAULT_TIMEOUT);
+ printk(KERN_INFO PFX
+ "timeout value must be 15 <= timeout <= 7635, using %d\n",
+ DEFAULT_TIMEOUT);
}
- if (!request_region(IO_INDEX_PORT, 2, WATCHDOG_NAME))
- {
+ if (!request_region(IO_INDEX_PORT, 2, WATCHDOG_NAME)) {
printk(KERN_ERR PFX "I/O address 0x%04x already in use\n",
IO_INDEX_PORT);
rc = -EIO;
@@ -495,30 +492,30 @@ static int __init w83977f_wdt_init(void)
}
rc = register_reboot_notifier(&wdt_notifier);
- if (rc)
- {
- printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
- rc);
+ if (rc) {
+ printk(KERN_ERR PFX
+ "cannot register reboot notifier (err=%d)\n", rc);
goto err_out_region;
}
rc = misc_register(&wdt_miscdev);
- if (rc)
- {
- printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- wdt_miscdev.minor, rc);
+ if (rc) {
+ printk(KERN_ERR PFX
+ "cannot register miscdev on minor=%d (err=%d)\n",
+ wdt_miscdev.minor, rc);
goto err_out_reboot;
}
- printk(KERN_INFO PFX "initialized. timeout=%d sec (nowayout=%d testmode=%d)\n",
- timeout, nowayout, testmode);
+ printk(KERN_INFO PFX
+ "initialized. timeout=%d sec (nowayout=%d testmode=%d)\n",
+ timeout, nowayout, testmode);
return 0;
err_out_reboot:
unregister_reboot_notifier(&wdt_notifier);
err_out_region:
- release_region(IO_INDEX_PORT,2);
+ release_region(IO_INDEX_PORT, 2);
err_out:
return rc;
}
@@ -528,7 +525,7 @@ static void __exit w83977f_wdt_exit(void)
wdt_stop();
misc_deregister(&wdt_miscdev);
unregister_reboot_notifier(&wdt_notifier);
- release_region(IO_INDEX_PORT,2);
+ release_region(IO_INDEX_PORT, 2);
}
module_init(w83977f_wdt_init);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-21 10:49:45 +0100