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[WATCHDOG 56/57] wdt977: clean up, coding style and switch to unlocked_ioctl

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Review and switch to unlocked_ioctl

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
This commit is contained in:
Alan Cox 2008-05-19 14:09:57 +01:00 committed by Wim Van Sebroeck
parent d0e58eed05
commit f2b79c6ede
1 changed files with 74 additions and 74 deletions
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148
drivers/watchdog/wdt977.c
View File

@ -19,7 +19,8 @@
* 07-Jul-2003 Daniele Bellucci: Audit return code of misc_register in * 07-Jul-2003 Daniele Bellucci: Audit return code of misc_register in
* nwwatchdog_init. * nwwatchdog_init.
* 25-Oct-2005 Woody Suwalski: Convert addresses to #defs, add spinlocks * 25-Oct-2005 Woody Suwalski: Convert addresses to #defs, add spinlocks
* remove limitiation to be used on Netwinders only * remove limitiation to be used on
* Netwinders only
*/ */
#include <linux/module.h> #include <linux/module.h>
@ -33,11 +34,11 @@
#include <linux/watchdog.h> #include <linux/watchdog.h>
#include <linux/notifier.h> #include <linux/notifier.h>
#include <linux/reboot.h> #include <linux/reboot.h>
#include <linux/io.h>
#include <linux/uaccess.h>
#include <asm/io.h>
#include <asm/system.h> #include <asm/system.h>
#include <asm/mach-types.h> #include <asm/mach-types.h>
#include <asm/uaccess.h>
#define WATCHDOG_VERSION "0.04" #define WATCHDOG_VERSION "0.04"
#define WATCHDOG_NAME "Wdt977" #define WATCHDOG_NAME "Wdt977"
@ -45,7 +46,7 @@
#define DRIVER_VERSION WATCHDOG_NAME " driver, v" WATCHDOG_VERSION "\n" #define DRIVER_VERSION WATCHDOG_NAME " driver, v" WATCHDOG_VERSION "\n"
#define IO_INDEX_PORT 0x370 /* on some systems it can be 0x3F0 */ #define IO_INDEX_PORT 0x370 /* on some systems it can be 0x3F0 */
#define IO_DATA_PORT (IO_INDEX_PORT+1) #define IO_DATA_PORT (IO_INDEX_PORT + 1)
#define UNLOCK_DATA 0x87 #define UNLOCK_DATA 0x87
#define LOCK_DATA 0xAA #define LOCK_DATA 0xAA
@ -62,13 +63,16 @@ static char expect_close;
static DEFINE_SPINLOCK(spinlock); static DEFINE_SPINLOCK(spinlock);
module_param(timeout, int, 0); module_param(timeout, int, 0);
MODULE_PARM_DESC(timeout,"Watchdog timeout in seconds (60..15300), default=" __MODULE_STRING(DEFAULT_TIMEOUT) ")"); MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds (60..15300), default="
__MODULE_STRING(DEFAULT_TIMEOUT) ")");
module_param(testmode, int, 0); 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; static int nowayout = WATCHDOG_NOWAYOUT;
module_param(nowayout, int, 0); 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 * Start the watchdog
@ -95,14 +99,16 @@ static int wdt977_start(void)
outb_p(0xF2, IO_INDEX_PORT); outb_p(0xF2, IO_INDEX_PORT);
outb_p(timeoutM, IO_DATA_PORT); outb_p(timeoutM, IO_DATA_PORT);
outb_p(0xF3, IO_INDEX_PORT); outb_p(0xF3, IO_INDEX_PORT);
outb_p(0x00, IO_DATA_PORT); /* another setting is 0E for kbd/mouse/LED */ outb_p(0x00, IO_DATA_PORT); /* another setting is 0E for
kbd/mouse/LED */
outb_p(0xF4, IO_INDEX_PORT); outb_p(0xF4, IO_INDEX_PORT);
outb_p(0x00, IO_DATA_PORT); outb_p(0x00, IO_DATA_PORT);
/* at last select device Aux1 (dev=7) and set GP16 as a watchdog output */ /* At last select device Aux1 (dev=7) and set GP16 as a
/* in test mode watch the bit 1 on F4 to indicate "triggered" */ * watchdog output. In test mode watch the bit 1 on F4 to
if (!testmode) * indicate "triggered"
{ */
if (!testmode) {
outb_p(DEVICE_REGISTER, IO_INDEX_PORT); outb_p(DEVICE_REGISTER, IO_INDEX_PORT);
outb_p(0x07, IO_DATA_PORT); outb_p(0x07, IO_DATA_PORT);
outb_p(0xE6, IO_INDEX_PORT); outb_p(0xE6, IO_INDEX_PORT);
@ -147,7 +153,8 @@ static int wdt977_stop(void)
outb_p(0xF2, IO_INDEX_PORT); outb_p(0xF2, IO_INDEX_PORT);
outb_p(0x00, IO_DATA_PORT); outb_p(0x00, IO_DATA_PORT);
/* at last select device Aux1 (dev=7) and set GP16 as a watchdog output */ /* at last select device Aux1 (dev=7) and set
GP16 as a watchdog output */
outb_p(DEVICE_REGISTER, IO_INDEX_PORT); outb_p(DEVICE_REGISTER, IO_INDEX_PORT);
outb_p(0x07, IO_DATA_PORT); outb_p(0x07, IO_DATA_PORT);
outb_p(0xE6, IO_INDEX_PORT); outb_p(0xE6, IO_INDEX_PORT);
@ -202,16 +209,18 @@ static int wdt977_set_timeout(int t)
tmrval = (t + 59) / 60; tmrval = (t + 59) / 60;
if (machine_is_netwinder()) { if (machine_is_netwinder()) {
/* we have a hw bug somewhere, so each 977 minute is actually only 30sec /* we have a hw bug somewhere, so each 977 minute is actually
* this limits the max timeout to half of device max of 255 minutes... * only 30sec. This limits the max timeout to half of device
* max of 255 minutes...
*/ */
tmrval += tmrval; tmrval += tmrval;
} }
if ((tmrval < 1) || (tmrval > 255)) if (tmrval < 1 || tmrval > 255)
return -EINVAL; return -EINVAL;
/* timeout is the timeout in seconds, timeoutM is the timeout in minutes) */ /* timeout is the timeout in seconds, timeoutM is
the timeout in minutes) */
timeout = t; timeout = t;
timeoutM = tmrval; timeoutM = tmrval;
return 0; return 0;
@ -243,7 +252,7 @@ static int wdt977_get_status(int *status)
spin_unlock_irqrestore(&spinlock, flags); spin_unlock_irqrestore(&spinlock, flags);
*status=0; *status = 0;
if (new_status & 1) if (new_status & 1)
*status |= WDIOF_CARDRESET; *status |= WDIOF_CARDRESET;
@ -258,7 +267,7 @@ static int wdt977_get_status(int *status)
static int wdt977_open(struct inode *inode, struct file *file) static int wdt977_open(struct inode *inode, struct file *file)
{ {
/* If the watchdog is alive we don't need to start it again */ /* 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; return -EBUSY;
if (nowayout) if (nowayout)
@ -274,13 +283,13 @@ static int wdt977_release(struct inode *inode, struct file *file)
* Shut off the timer. * Shut off the timer.
* Lock it in if it's a module and we set nowayout * Lock it in if it's a module and we set nowayout
*/ */
if (expect_close == 42) if (expect_close == 42) {
{
wdt977_stop(); wdt977_stop();
clear_bit(0,&timer_alive); clear_bit(0, &timer_alive);
} else { } else {
wdt977_keepalive(); wdt977_keepalive();
printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n"); printk(KERN_CRIT PFX
"Unexpected close, not stopping watchdog!\n");
} }
expect_close = 0; expect_close = 0;
return 0; return 0;
@ -301,17 +310,14 @@ static int wdt977_release(struct inode *inode, struct file *file)
static ssize_t wdt977_write(struct file *file, const char __user *buf, static ssize_t wdt977_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos) size_t count, loff_t *ppos)
{ {
if (count) if (count) {
{ if (!nowayout) {
if (!nowayout)
{
size_t i; size_t i;
/* In case it was set long ago */ /* In case it was set long ago */
expect_close = 0; expect_close = 0;
for (i = 0; i != count; i++) for (i = 0; i != count; i++) {
{
char c; char c;
if (get_user(c, buf + i)) if (get_user(c, buf + i))
return -EFAULT; return -EFAULT;
@ -326,6 +332,14 @@ static ssize_t wdt977_write(struct file *file, const char __user *buf,
return count; return count;
} }
static const struct watchdog_info ident = {
.options = WDIOF_SETTIMEOUT |
WDIOF_MAGICCLOSE |
WDIOF_KEEPALIVEPING,
.firmware_version = 1,
.identity = WATCHDOG_NAME,
};
/* /*
* wdt977_ioctl: * wdt977_ioctl:
* @inode: inode of the device * @inode: inode of the device
@ -337,16 +351,8 @@ static ssize_t wdt977_write(struct file *file, const char __user *buf,
* according to their available features. * according to their available features.
*/ */
static struct watchdog_info ident = { static long wdt977_ioctl(struct file *file, unsigned int cmd,
.options = WDIOF_SETTIMEOUT | unsigned long arg)
WDIOF_MAGICCLOSE |
WDIOF_KEEPALIVEPING,
.firmware_version = 1,
.identity = WATCHDOG_NAME,
};
static int wdt977_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{ {
int status; int status;
int new_options, retval = -EINVAL; int new_options, retval = -EINVAL;
@ -358,8 +364,7 @@ static int wdt977_ioctl(struct inode *inode, struct file *file,
uarg.i = (int __user *)arg; uarg.i = (int __user *)arg;
switch(cmd) switch (cmd) {
{
default: default:
return -ENOTTY; return -ENOTTY;
@ -379,7 +384,7 @@ static int wdt977_ioctl(struct inode *inode, struct file *file,
return 0; return 0;
case WDIOC_SETOPTIONS: case WDIOC_SETOPTIONS:
if (get_user (new_options, uarg.i)) if (get_user(new_options, uarg.i))
return -EFAULT; return -EFAULT;
if (new_options & WDIOS_DISABLECARD) { if (new_options & WDIOS_DISABLECARD) {
@ -413,23 +418,21 @@ static int wdt977_ioctl(struct inode *inode, struct file *file,
static int wdt977_notify_sys(struct notifier_block *this, unsigned long code, static int wdt977_notify_sys(struct notifier_block *this, unsigned long code,
void *unused) void *unused)
{ {
if(code==SYS_DOWN || code==SYS_HALT) if (code == SYS_DOWN || code == SYS_HALT)
wdt977_stop(); wdt977_stop();
return NOTIFY_DONE; return NOTIFY_DONE;
} }
static const struct file_operations wdt977_fops= static const struct file_operations wdt977_fops = {
{
.owner = THIS_MODULE, .owner = THIS_MODULE,
.llseek = no_llseek, .llseek = no_llseek,
.write = wdt977_write, .write = wdt977_write,
.ioctl = wdt977_ioctl, .unlocked_ioctl = wdt977_ioctl,
.open = wdt977_open, .open = wdt977_open,
.release = wdt977_release, .release = wdt977_release,
}; };
static struct miscdevice wdt977_miscdev= static struct miscdevice wdt977_miscdev = {
{
.minor = WATCHDOG_MINOR, .minor = WATCHDOG_MINOR,
.name = "watchdog", .name = "watchdog",
.fops = &wdt977_fops, .fops = &wdt977_fops,
@ -443,51 +446,48 @@ static int __init wd977_init(void)
{ {
int rc; int rc;
//if (!machine_is_netwinder())
// return -ENODEV;
printk(KERN_INFO PFX DRIVER_VERSION); printk(KERN_INFO PFX DRIVER_VERSION);
/* Check that the timeout value is within it's range ; if not reset to the default */ /* Check that the timeout value is within its range;
if (wdt977_set_timeout(timeout)) if not reset to the default */
{ if (wdt977_set_timeout(timeout)) {
wdt977_set_timeout(DEFAULT_TIMEOUT); wdt977_set_timeout(DEFAULT_TIMEOUT);
printk(KERN_INFO PFX "timeout value must be 60<timeout<15300, using %d\n", printk(KERN_INFO PFX
DEFAULT_TIMEOUT); "timeout value must be 60 < timeout < 15300, using %d\n",
DEFAULT_TIMEOUT);
} }
/* on Netwinder the IOports are already reserved by /* on Netwinder the IOports are already reserved by
* arch/arm/mach-footbridge/netwinder-hw.c * arch/arm/mach-footbridge/netwinder-hw.c
*/ */
if (!machine_is_netwinder()) if (!machine_is_netwinder()) {
{ 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",
printk(KERN_ERR PFX "I/O address 0x%04x already in use\n", IO_INDEX_PORT);
IO_INDEX_PORT);
rc = -EIO; rc = -EIO;
goto err_out; goto err_out;
} }
} }
rc = register_reboot_notifier(&wdt977_notifier); rc = register_reboot_notifier(&wdt977_notifier);
if (rc) if (rc) {
{ printk(KERN_ERR PFX
printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n", "cannot register reboot notifier (err=%d)\n", rc);
rc);
goto err_out_region; goto err_out_region;
} }
rc = misc_register(&wdt977_miscdev); rc = misc_register(&wdt977_miscdev);
if (rc) if (rc) {
{ printk(KERN_ERR PFX
printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n", "cannot register miscdev on minor=%d (err=%d)\n",
wdt977_miscdev.minor, rc); wdt977_miscdev.minor, rc);
goto err_out_reboot; goto err_out_reboot;
} }
printk(KERN_INFO PFX "initialized. timeout=%d sec (nowayout=%d, testmode=%i)\n", printk(KERN_INFO PFX
timeout, nowayout, testmode); "initialized. timeout=%d sec (nowayout=%d, testmode=%i)\n",
timeout, nowayout, testmode);
return 0; return 0;
@ -495,7 +495,7 @@ err_out_reboot:
unregister_reboot_notifier(&wdt977_notifier); unregister_reboot_notifier(&wdt977_notifier);
err_out_region: err_out_region:
if (!machine_is_netwinder()) if (!machine_is_netwinder())
release_region(IO_INDEX_PORT,2); release_region(IO_INDEX_PORT, 2);
err_out: err_out:
return rc; return rc;
} }
@ -505,7 +505,7 @@ static void __exit wd977_exit(void)
wdt977_stop(); wdt977_stop();
misc_deregister(&wdt977_miscdev); misc_deregister(&wdt977_miscdev);
unregister_reboot_notifier(&wdt977_notifier); unregister_reboot_notifier(&wdt977_notifier);
release_region(IO_INDEX_PORT,2); release_region(IO_INDEX_PORT, 2);
} }
module_init(wd977_init); module_init(wd977_init);