[WATCHDOG 46/57] smsc37b787_wdt: coding style, switch to unlocked_ioctl
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
Wim Van Sebroeck
parent
70b814ec1a
commit
598467938d
1 changed files with 222 additions and 220 deletions
|
|
@ -18,7 +18,7 @@
|
|||
* History:
|
||||
* 2003 - Created version 1.0 for Linux 2.4.x.
|
||||
* 2006 - Ported to Linux 2.6, added nowayout and MAGICCLOSE
|
||||
* features. Released version 1.1
|
||||
* features. Released version 1.1
|
||||
*
|
||||
* Theory of operation:
|
||||
*
|
||||
|
|
@ -55,9 +55,9 @@
|
|||
#include <linux/reboot.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/spinlock.h>
|
||||
#include <linux/io.h>
|
||||
#include <linux/uaccess.h>
|
||||
|
||||
#include <asm/io.h>
|
||||
#include <asm/uaccess.h>
|
||||
#include <asm/system.h>
|
||||
|
||||
/* enable support for minutes as units? */
|
||||
|
|
@ -71,15 +71,15 @@
|
|||
#define UNIT_MINUTE 1
|
||||
|
||||
#define MODNAME "smsc37b787_wdt: "
|
||||
#define VERSION "1.1"
|
||||
#define VERSION "1.1"
|
||||
|
||||
#define IOPORT 0x3F0
|
||||
#define IOPORT 0x3F0
|
||||
#define IOPORT_SIZE 2
|
||||
#define IODEV_NO 8
|
||||
#define IODEV_NO 8
|
||||
|
||||
static int unit = UNIT_SECOND; /* timer's unit */
|
||||
static int timeout = 60; /* timeout value: default is 60 "units" */
|
||||
static unsigned long timer_enabled = 0; /* is the timer enabled? */
|
||||
static int unit = UNIT_SECOND; /* timer's unit */
|
||||
static int timeout = 60; /* timeout value: default is 60 "units" */
|
||||
static unsigned long timer_enabled; /* is the timer enabled? */
|
||||
|
||||
static char expect_close; /* is the close expected? */
|
||||
|
||||
|
|
@ -93,114 +93,121 @@ static int nowayout = WATCHDOG_NOWAYOUT;
|
|||
|
||||
static inline void open_io_config(void)
|
||||
{
|
||||
outb(0x55, IOPORT);
|
||||
outb(0x55, IOPORT);
|
||||
mdelay(1);
|
||||
outb(0x55, IOPORT);
|
||||
outb(0x55, IOPORT);
|
||||
}
|
||||
|
||||
/* lock the IO chip */
|
||||
static inline void close_io_config(void)
|
||||
{
|
||||
outb(0xAA, IOPORT);
|
||||
outb(0xAA, IOPORT);
|
||||
}
|
||||
|
||||
/* select the IO device */
|
||||
static inline void select_io_device(unsigned char devno)
|
||||
{
|
||||
outb(0x07, IOPORT);
|
||||
outb(devno, IOPORT+1);
|
||||
outb(0x07, IOPORT);
|
||||
outb(devno, IOPORT+1);
|
||||
}
|
||||
|
||||
/* write to the control register */
|
||||
static inline void write_io_cr(unsigned char reg, unsigned char data)
|
||||
{
|
||||
outb(reg, IOPORT);
|
||||
outb(data, IOPORT+1);
|
||||
outb(reg, IOPORT);
|
||||
outb(data, IOPORT+1);
|
||||
}
|
||||
|
||||
/* read from the control register */
|
||||
static inline char read_io_cr(unsigned char reg)
|
||||
{
|
||||
outb(reg, IOPORT);
|
||||
return inb(IOPORT+1);
|
||||
outb(reg, IOPORT);
|
||||
return inb(IOPORT+1);
|
||||
}
|
||||
|
||||
/* -- Medium level functions ------------------------------------*/
|
||||
|
||||
static inline void gpio_bit12(unsigned char reg)
|
||||
{
|
||||
// -- General Purpose I/O Bit 1.2 --
|
||||
// Bit 0, In/Out: 0 = Output, 1 = Input
|
||||
// Bit 1, Polarity: 0 = No Invert, 1 = Invert
|
||||
// Bit 2, Group Enable Intr.: 0 = Disable, 1 = Enable
|
||||
// Bit 3/4, Function select: 00 = GPI/O, 01 = WDT, 10 = P17,
|
||||
// 11 = Either Edge Triggered Intr. 2
|
||||
// Bit 5/6 (Reserved)
|
||||
// Bit 7, Output Type: 0 = Push Pull Bit, 1 = Open Drain
|
||||
write_io_cr(0xE2, reg);
|
||||
/* -- General Purpose I/O Bit 1.2 --
|
||||
* Bit 0, In/Out: 0 = Output, 1 = Input
|
||||
* Bit 1, Polarity: 0 = No Invert, 1 = Invert
|
||||
* Bit 2, Group Enable Intr.: 0 = Disable, 1 = Enable
|
||||
* Bit 3/4, Function select: 00 = GPI/O, 01 = WDT, 10 = P17,
|
||||
* 11 = Either Edge Triggered Intr. 2
|
||||
* Bit 5/6 (Reserved)
|
||||
* Bit 7, Output Type: 0 = Push Pull Bit, 1 = Open Drain
|
||||
*/
|
||||
write_io_cr(0xE2, reg);
|
||||
}
|
||||
|
||||
static inline void gpio_bit13(unsigned char reg)
|
||||
{
|
||||
// -- General Purpose I/O Bit 1.3 --
|
||||
// Bit 0, In/Out: 0 = Output, 1 = Input
|
||||
// Bit 1, Polarity: 0 = No Invert, 1 = Invert
|
||||
// Bit 2, Group Enable Intr.: 0 = Disable, 1 = Enable
|
||||
// Bit 3, Function select: 0 = GPI/O, 1 = LED
|
||||
// Bit 4-6 (Reserved)
|
||||
// Bit 7, Output Type: 0 = Push Pull Bit, 1 = Open Drain
|
||||
write_io_cr(0xE3, reg);
|
||||
/* -- General Purpose I/O Bit 1.3 --
|
||||
* Bit 0, In/Out: 0 = Output, 1 = Input
|
||||
* Bit 1, Polarity: 0 = No Invert, 1 = Invert
|
||||
* Bit 2, Group Enable Intr.: 0 = Disable, 1 = Enable
|
||||
* Bit 3, Function select: 0 = GPI/O, 1 = LED
|
||||
* Bit 4-6 (Reserved)
|
||||
* Bit 7, Output Type: 0 = Push Pull Bit, 1 = Open Drain
|
||||
*/
|
||||
write_io_cr(0xE3, reg);
|
||||
}
|
||||
|
||||
static inline void wdt_timer_units(unsigned char new_units)
|
||||
{
|
||||
// -- Watchdog timer units --
|
||||
// Bit 0-6 (Reserved)
|
||||
// Bit 7, WDT Time-out Value Units Select
|
||||
// (0 = Minutes, 1 = Seconds)
|
||||
write_io_cr(0xF1, new_units);
|
||||
/* -- Watchdog timer units --
|
||||
* Bit 0-6 (Reserved)
|
||||
* Bit 7, WDT Time-out Value Units Select
|
||||
* (0 = Minutes, 1 = Seconds)
|
||||
*/
|
||||
write_io_cr(0xF1, new_units);
|
||||
}
|
||||
|
||||
static inline void wdt_timeout_value(unsigned char new_timeout)
|
||||
{
|
||||
// -- Watchdog Timer Time-out Value --
|
||||
// Bit 0-7 Binary coded units (0=Disabled, 1..255)
|
||||
write_io_cr(0xF2, new_timeout);
|
||||
/* -- Watchdog Timer Time-out Value --
|
||||
* Bit 0-7 Binary coded units (0=Disabled, 1..255)
|
||||
*/
|
||||
write_io_cr(0xF2, new_timeout);
|
||||
}
|
||||
|
||||
static inline void wdt_timer_conf(unsigned char conf)
|
||||
{
|
||||
// -- Watchdog timer configuration --
|
||||
// Bit 0 Joystick enable: 0* = No Reset, 1 = Reset WDT upon Gameport I/O
|
||||
// Bit 1 Keyboard enable: 0* = No Reset, 1 = Reset WDT upon KBD Intr.
|
||||
// Bit 2 Mouse enable: 0* = No Reset, 1 = Reset WDT upon Mouse Intr.
|
||||
// Bit 3 Reset the timer
|
||||
// (Wrong in SMsC documentation? Given as: PowerLED Timout Enabled)
|
||||
// Bit 4-7 WDT Interrupt Mapping: (0000* = Disabled,
|
||||
// 0001=IRQ1, 0010=(Invalid), 0011=IRQ3 to 1111=IRQ15)
|
||||
write_io_cr(0xF3, conf);
|
||||
/* -- Watchdog timer configuration --
|
||||
* Bit 0 Joystick enable: 0* = No Reset, 1 = Reset WDT upon
|
||||
* Gameport I/O
|
||||
* Bit 1 Keyboard enable: 0* = No Reset, 1 = Reset WDT upon KBD Intr.
|
||||
* Bit 2 Mouse enable: 0* = No Reset, 1 = Reset WDT upon Mouse Intr
|
||||
* Bit 3 Reset the timer
|
||||
* (Wrong in SMsC documentation? Given as: PowerLED Timout
|
||||
* Enabled)
|
||||
* Bit 4-7 WDT Interrupt Mapping: (0000* = Disabled,
|
||||
* 0001=IRQ1, 0010=(Invalid), 0011=IRQ3 to 1111=IRQ15)
|
||||
*/
|
||||
write_io_cr(0xF3, conf);
|
||||
}
|
||||
|
||||
static inline void wdt_timer_ctrl(unsigned char reg)
|
||||
{
|
||||
// -- Watchdog timer control --
|
||||
// Bit 0 Status Bit: 0 = Timer counting, 1 = Timeout occured
|
||||
// Bit 1 Power LED Toggle: 0 = Disable Toggle, 1 = Toggle at 1 Hz
|
||||
// Bit 2 Force Timeout: 1 = Forces WD timeout event (self-cleaning)
|
||||
// Bit 3 P20 Force Timeout enabled:
|
||||
// 0 = P20 activity does not generate the WD timeout event
|
||||
// 1 = P20 Allows rising edge of P20, from the keyboard
|
||||
// controller, to force the WD timeout event.
|
||||
// Bit 4 (Reserved)
|
||||
// -- Soft power management --
|
||||
// Bit 5 Stop Counter: 1 = Stop software power down counter
|
||||
// set via register 0xB8, (self-cleaning)
|
||||
// (Upon read: 0 = Counter running, 1 = Counter stopped)
|
||||
// Bit 6 Restart Counter: 1 = Restart software power down counter
|
||||
// set via register 0xB8, (self-cleaning)
|
||||
// Bit 7 SPOFF: 1 = Force software power down (self-cleaning)
|
||||
|
||||
write_io_cr(0xF4, reg);
|
||||
/* -- Watchdog timer control --
|
||||
* Bit 0 Status Bit: 0 = Timer counting, 1 = Timeout occured
|
||||
* Bit 1 Power LED Toggle: 0 = Disable Toggle, 1 = Toggle at 1 Hz
|
||||
* Bit 2 Force Timeout: 1 = Forces WD timeout event (self-cleaning)
|
||||
* Bit 3 P20 Force Timeout enabled:
|
||||
* 0 = P20 activity does not generate the WD timeout event
|
||||
* 1 = P20 Allows rising edge of P20, from the keyboard
|
||||
* controller, to force the WD timeout event.
|
||||
* Bit 4 (Reserved)
|
||||
* -- Soft power management --
|
||||
* Bit 5 Stop Counter: 1 = Stop software power down counter
|
||||
* set via register 0xB8, (self-cleaning)
|
||||
* (Upon read: 0 = Counter running, 1 = Counter stopped)
|
||||
* Bit 6 Restart Counter: 1 = Restart software power down counter
|
||||
* set via register 0xB8, (self-cleaning)
|
||||
* Bit 7 SPOFF: 1 = Force software power down (self-cleaning)
|
||||
*/
|
||||
write_io_cr(0xF4, reg);
|
||||
}
|
||||
|
||||
/* -- Higher level functions ------------------------------------*/
|
||||
|
|
@ -209,33 +216,34 @@ static inline void wdt_timer_ctrl(unsigned char reg)
|
|||
|
||||
static void wb_smsc_wdt_initialize(void)
|
||||
{
|
||||
unsigned char old;
|
||||
unsigned char old;
|
||||
|
||||
spin_lock(&io_lock);
|
||||
open_io_config();
|
||||
select_io_device(IODEV_NO);
|
||||
open_io_config();
|
||||
select_io_device(IODEV_NO);
|
||||
|
||||
// enable the watchdog
|
||||
gpio_bit13(0x08); // Select pin 80 = LED not GPIO
|
||||
gpio_bit12(0x0A); // Set pin 79 = WDT not GPIO/Output/Polarity=Invert
|
||||
/* enable the watchdog */
|
||||
gpio_bit13(0x08); /* Select pin 80 = LED not GPIO */
|
||||
gpio_bit12(0x0A); /* Set pin 79 = WDT not
|
||||
GPIO/Output/Polarity=Invert */
|
||||
/* disable the timeout */
|
||||
wdt_timeout_value(0);
|
||||
|
||||
// disable the timeout
|
||||
wdt_timeout_value(0);
|
||||
/* reset control register */
|
||||
wdt_timer_ctrl(0x00);
|
||||
|
||||
// reset control register
|
||||
wdt_timer_ctrl(0x00);
|
||||
|
||||
// reset configuration register
|
||||
/* reset configuration register */
|
||||
wdt_timer_conf(0x00);
|
||||
|
||||
// read old (timer units) register
|
||||
old = read_io_cr(0xF1) & 0x7F;
|
||||
if (unit == UNIT_SECOND) old |= 0x80; // set to seconds
|
||||
/* read old (timer units) register */
|
||||
old = read_io_cr(0xF1) & 0x7F;
|
||||
if (unit == UNIT_SECOND)
|
||||
old |= 0x80; /* set to seconds */
|
||||
|
||||
// set the watchdog timer units
|
||||
wdt_timer_units(old);
|
||||
/* set the watchdog timer units */
|
||||
wdt_timer_units(old);
|
||||
|
||||
close_io_config();
|
||||
close_io_config();
|
||||
spin_unlock(&io_lock);
|
||||
}
|
||||
|
||||
|
|
@ -244,23 +252,23 @@ static void wb_smsc_wdt_initialize(void)
|
|||
static void wb_smsc_wdt_shutdown(void)
|
||||
{
|
||||
spin_lock(&io_lock);
|
||||
open_io_config();
|
||||
select_io_device(IODEV_NO);
|
||||
open_io_config();
|
||||
select_io_device(IODEV_NO);
|
||||
|
||||
// disable the watchdog
|
||||
gpio_bit13(0x09);
|
||||
gpio_bit12(0x09);
|
||||
/* disable the watchdog */
|
||||
gpio_bit13(0x09);
|
||||
gpio_bit12(0x09);
|
||||
|
||||
// reset watchdog config register
|
||||
/* reset watchdog config register */
|
||||
wdt_timer_conf(0x00);
|
||||
|
||||
// reset watchdog control register
|
||||
wdt_timer_ctrl(0x00);
|
||||
/* reset watchdog control register */
|
||||
wdt_timer_ctrl(0x00);
|
||||
|
||||
// disable timeout
|
||||
wdt_timeout_value(0x00);
|
||||
/* disable timeout */
|
||||
wdt_timeout_value(0x00);
|
||||
|
||||
close_io_config();
|
||||
close_io_config();
|
||||
spin_unlock(&io_lock);
|
||||
}
|
||||
|
||||
|
|
@ -269,16 +277,16 @@ static void wb_smsc_wdt_shutdown(void)
|
|||
static void wb_smsc_wdt_set_timeout(unsigned char new_timeout)
|
||||
{
|
||||
spin_lock(&io_lock);
|
||||
open_io_config();
|
||||
select_io_device(IODEV_NO);
|
||||
open_io_config();
|
||||
select_io_device(IODEV_NO);
|
||||
|
||||
// set Power LED to blink, if we enable the timeout
|
||||
wdt_timer_ctrl((new_timeout == 0) ? 0x00 : 0x02);
|
||||
/* set Power LED to blink, if we enable the timeout */
|
||||
wdt_timer_ctrl((new_timeout == 0) ? 0x00 : 0x02);
|
||||
|
||||
// set timeout value
|
||||
wdt_timeout_value(new_timeout);
|
||||
/* set timeout value */
|
||||
wdt_timeout_value(new_timeout);
|
||||
|
||||
close_io_config();
|
||||
close_io_config();
|
||||
spin_unlock(&io_lock);
|
||||
}
|
||||
|
||||
|
|
@ -286,32 +294,32 @@ static void wb_smsc_wdt_set_timeout(unsigned char new_timeout)
|
|||
|
||||
static unsigned char wb_smsc_wdt_get_timeout(void)
|
||||
{
|
||||
unsigned char set_timeout;
|
||||
unsigned char set_timeout;
|
||||
|
||||
spin_lock(&io_lock);
|
||||
open_io_config();
|
||||
select_io_device(IODEV_NO);
|
||||
set_timeout = read_io_cr(0xF2);
|
||||
close_io_config();
|
||||
open_io_config();
|
||||
select_io_device(IODEV_NO);
|
||||
set_timeout = read_io_cr(0xF2);
|
||||
close_io_config();
|
||||
spin_unlock(&io_lock);
|
||||
|
||||
return set_timeout;
|
||||
return set_timeout;
|
||||
}
|
||||
|
||||
/* disable watchdog */
|
||||
|
||||
static void wb_smsc_wdt_disable(void)
|
||||
{
|
||||
// set the timeout to 0 to disable the watchdog
|
||||
wb_smsc_wdt_set_timeout(0);
|
||||
/* set the timeout to 0 to disable the watchdog */
|
||||
wb_smsc_wdt_set_timeout(0);
|
||||
}
|
||||
|
||||
/* enable watchdog by setting the current timeout */
|
||||
|
||||
static void wb_smsc_wdt_enable(void)
|
||||
{
|
||||
// set the current timeout...
|
||||
wb_smsc_wdt_set_timeout(timeout);
|
||||
/* set the current timeout... */
|
||||
wb_smsc_wdt_set_timeout(timeout);
|
||||
}
|
||||
|
||||
/* reset the timer */
|
||||
|
|
@ -319,14 +327,14 @@ static void wb_smsc_wdt_enable(void)
|
|||
static void wb_smsc_wdt_reset_timer(void)
|
||||
{
|
||||
spin_lock(&io_lock);
|
||||
open_io_config();
|
||||
select_io_device(IODEV_NO);
|
||||
open_io_config();
|
||||
select_io_device(IODEV_NO);
|
||||
|
||||
// reset the timer
|
||||
/* reset the timer */
|
||||
wdt_timeout_value(timeout);
|
||||
wdt_timer_conf(0x08);
|
||||
|
||||
close_io_config();
|
||||
close_io_config();
|
||||
spin_unlock(&io_lock);
|
||||
}
|
||||
|
||||
|
|
@ -355,7 +363,9 @@ static int wb_smsc_wdt_open(struct inode *inode, struct file *file)
|
|||
/* Reload and activate timer */
|
||||
wb_smsc_wdt_enable();
|
||||
|
||||
printk(KERN_INFO MODNAME "Watchdog enabled. Timeout set to %d %s.\n", timeout, (unit == UNIT_SECOND) ? "second(s)" : "minute(s)");
|
||||
printk(KERN_INFO MODNAME
|
||||
"Watchdog enabled. Timeout set to %d %s.\n",
|
||||
timeout, (unit == UNIT_SECOND) ? "second(s)" : "minute(s)");
|
||||
|
||||
return nonseekable_open(inode, file);
|
||||
}
|
||||
|
|
@ -367,10 +377,12 @@ static int wb_smsc_wdt_release(struct inode *inode, struct file *file)
|
|||
/* Shut off the timer. */
|
||||
|
||||
if (expect_close == 42) {
|
||||
wb_smsc_wdt_disable();
|
||||
printk(KERN_INFO MODNAME "Watchdog disabled, sleeping again...\n");
|
||||
wb_smsc_wdt_disable();
|
||||
printk(KERN_INFO MODNAME
|
||||
"Watchdog disabled, sleeping again...\n");
|
||||
} else {
|
||||
printk(KERN_CRIT MODNAME "Unexpected close, not stopping watchdog!\n");
|
||||
printk(KERN_CRIT MODNAME
|
||||
"Unexpected close, not stopping watchdog!\n");
|
||||
wb_smsc_wdt_reset_timer();
|
||||
}
|
||||
|
||||
|
|
@ -392,7 +404,8 @@ static ssize_t wb_smsc_wdt_write(struct file *file, const char __user *data,
|
|||
/* reset expect flag */
|
||||
expect_close = 0;
|
||||
|
||||
/* scan to see whether or not we got the magic character */
|
||||
/* scan to see whether or not we got the
|
||||
magic character */
|
||||
for (i = 0; i != len; i++) {
|
||||
char c;
|
||||
if (get_user(c, data+i))
|
||||
|
|
@ -410,8 +423,8 @@ static ssize_t wb_smsc_wdt_write(struct file *file, const char __user *data,
|
|||
|
||||
/* ioctl => control interface */
|
||||
|
||||
static int wb_smsc_wdt_ioctl(struct inode *inode, struct file *file,
|
||||
unsigned int cmd, unsigned long arg)
|
||||
static long wb_smsc_wdt_ioctl(struct file *file,
|
||||
unsigned int cmd, unsigned long arg)
|
||||
{
|
||||
int new_timeout;
|
||||
|
||||
|
|
@ -420,9 +433,9 @@ static int wb_smsc_wdt_ioctl(struct inode *inode, struct file *file,
|
|||
int __user *i;
|
||||
} uarg;
|
||||
|
||||
static struct watchdog_info ident = {
|
||||
static const struct watchdog_info ident = {
|
||||
.options = WDIOF_KEEPALIVEPING |
|
||||
WDIOF_SETTIMEOUT |
|
||||
WDIOF_SETTIMEOUT |
|
||||
WDIOF_MAGICCLOSE,
|
||||
.firmware_version = 0,
|
||||
.identity = "SMsC 37B787 Watchdog"
|
||||
|
|
@ -431,78 +444,62 @@ static int wb_smsc_wdt_ioctl(struct inode *inode, struct file *file,
|
|||
uarg.i = (int __user *)arg;
|
||||
|
||||
switch (cmd) {
|
||||
default:
|
||||
return -ENOTTY;
|
||||
|
||||
case WDIOC_GETSUPPORT:
|
||||
return copy_to_user(uarg.ident, &ident,
|
||||
sizeof(ident)) ? -EFAULT : 0;
|
||||
|
||||
case WDIOC_GETSTATUS:
|
||||
return put_user(wb_smsc_wdt_status(), uarg.i);
|
||||
|
||||
case WDIOC_GETBOOTSTATUS:
|
||||
return put_user(0, uarg.i);
|
||||
|
||||
case WDIOC_KEEPALIVE:
|
||||
wb_smsc_wdt_reset_timer();
|
||||
return 0;
|
||||
|
||||
case WDIOC_SETTIMEOUT:
|
||||
if (get_user(new_timeout, uarg.i))
|
||||
return -EFAULT;
|
||||
|
||||
// the API states this is given in secs
|
||||
if (unit == UNIT_MINUTE)
|
||||
new_timeout /= 60;
|
||||
|
||||
if (new_timeout < 0 || new_timeout > MAX_TIMEOUT)
|
||||
return -EINVAL;
|
||||
|
||||
timeout = new_timeout;
|
||||
wb_smsc_wdt_set_timeout(timeout);
|
||||
|
||||
// fall through and return the new timeout...
|
||||
|
||||
case WDIOC_GETTIMEOUT:
|
||||
|
||||
new_timeout = timeout;
|
||||
|
||||
if (unit == UNIT_MINUTE)
|
||||
case WDIOC_GETSUPPORT:
|
||||
return copy_to_user(uarg.ident, &ident, sizeof(ident))
|
||||
? -EFAULT : 0;
|
||||
case WDIOC_GETSTATUS:
|
||||
return put_user(wb_smsc_wdt_status(), uarg.i);
|
||||
case WDIOC_GETBOOTSTATUS:
|
||||
return put_user(0, uarg.i);
|
||||
case WDIOC_KEEPALIVE:
|
||||
wb_smsc_wdt_reset_timer();
|
||||
return 0;
|
||||
case WDIOC_SETTIMEOUT:
|
||||
if (get_user(new_timeout, uarg.i))
|
||||
return -EFAULT;
|
||||
/* the API states this is given in secs */
|
||||
if (unit == UNIT_MINUTE)
|
||||
new_timeout /= 60;
|
||||
if (new_timeout < 0 || new_timeout > MAX_TIMEOUT)
|
||||
return -EINVAL;
|
||||
timeout = new_timeout;
|
||||
wb_smsc_wdt_set_timeout(timeout);
|
||||
/* fall through and return the new timeout... */
|
||||
case WDIOC_GETTIMEOUT:
|
||||
new_timeout = timeout;
|
||||
if (unit == UNIT_MINUTE)
|
||||
new_timeout *= 60;
|
||||
return put_user(new_timeout, uarg.i);
|
||||
case WDIOC_SETOPTIONS:
|
||||
{
|
||||
int options, retval = -EINVAL;
|
||||
|
||||
return put_user(new_timeout, uarg.i);
|
||||
if (get_user(options, uarg.i))
|
||||
return -EFAULT;
|
||||
|
||||
case WDIOC_SETOPTIONS:
|
||||
{
|
||||
int options, retval = -EINVAL;
|
||||
|
||||
if (get_user(options, uarg.i))
|
||||
return -EFAULT;
|
||||
|
||||
if (options & WDIOS_DISABLECARD) {
|
||||
wb_smsc_wdt_disable();
|
||||
retval = 0;
|
||||
}
|
||||
|
||||
if (options & WDIOS_ENABLECARD) {
|
||||
wb_smsc_wdt_enable();
|
||||
retval = 0;
|
||||
}
|
||||
|
||||
return retval;
|
||||
if (options & WDIOS_DISABLECARD) {
|
||||
wb_smsc_wdt_disable();
|
||||
retval = 0;
|
||||
}
|
||||
if (options & WDIOS_ENABLECARD) {
|
||||
wb_smsc_wdt_enable();
|
||||
retval = 0;
|
||||
}
|
||||
return retval;
|
||||
}
|
||||
default:
|
||||
return -ENOTTY;
|
||||
}
|
||||
}
|
||||
|
||||
/* -- Notifier funtions -----------------------------------------*/
|
||||
|
||||
static int wb_smsc_wdt_notify_sys(struct notifier_block *this, unsigned long code, void *unused)
|
||||
static int wb_smsc_wdt_notify_sys(struct notifier_block *this,
|
||||
unsigned long code, void *unused)
|
||||
{
|
||||
if (code == SYS_DOWN || code == SYS_HALT)
|
||||
{
|
||||
// set timeout to 0, to avoid possible race-condition
|
||||
timeout = 0;
|
||||
if (code == SYS_DOWN || code == SYS_HALT) {
|
||||
/* set timeout to 0, to avoid possible race-condition */
|
||||
timeout = 0;
|
||||
wb_smsc_wdt_disable();
|
||||
}
|
||||
return NOTIFY_DONE;
|
||||
|
|
@ -510,23 +507,20 @@ static int wb_smsc_wdt_notify_sys(struct notifier_block *this, unsigned long cod
|
|||
|
||||
/* -- Module's structures ---------------------------------------*/
|
||||
|
||||
static const struct file_operations wb_smsc_wdt_fops =
|
||||
{
|
||||
.owner = THIS_MODULE,
|
||||
static const struct file_operations wb_smsc_wdt_fops = {
|
||||
.owner = THIS_MODULE,
|
||||
.llseek = no_llseek,
|
||||
.write = wb_smsc_wdt_write,
|
||||
.ioctl = wb_smsc_wdt_ioctl,
|
||||
.unlocked_ioctl = wb_smsc_wdt_ioctl,
|
||||
.open = wb_smsc_wdt_open,
|
||||
.release = wb_smsc_wdt_release,
|
||||
};
|
||||
|
||||
static struct notifier_block wb_smsc_wdt_notifier =
|
||||
{
|
||||
static struct notifier_block wb_smsc_wdt_notifier = {
|
||||
.notifier_call = wb_smsc_wdt_notify_sys,
|
||||
};
|
||||
|
||||
static struct miscdevice wb_smsc_wdt_miscdev =
|
||||
{
|
||||
static struct miscdevice wb_smsc_wdt_miscdev = {
|
||||
.minor = WATCHDOG_MINOR,
|
||||
.name = "watchdog",
|
||||
.fops = &wb_smsc_wdt_fops,
|
||||
|
|
@ -540,39 +534,44 @@ static int __init wb_smsc_wdt_init(void)
|
|||
{
|
||||
int ret;
|
||||
|
||||
printk("SMsC 37B787 watchdog component driver " VERSION " initialising...\n");
|
||||
printk(KERN_INFO "SMsC 37B787 watchdog component driver "
|
||||
VERSION " initialising...\n");
|
||||
|
||||
if (!request_region(IOPORT, IOPORT_SIZE, "SMsC 37B787 watchdog")) {
|
||||
printk(KERN_ERR MODNAME "Unable to register IO port %#x\n", IOPORT);
|
||||
printk(KERN_ERR MODNAME "Unable to register IO port %#x\n",
|
||||
IOPORT);
|
||||
ret = -EBUSY;
|
||||
goto out_pnp;
|
||||
}
|
||||
|
||||
// set new maximum, if it's too big
|
||||
if (timeout > MAX_TIMEOUT)
|
||||
timeout = MAX_TIMEOUT;
|
||||
/* set new maximum, if it's too big */
|
||||
if (timeout > MAX_TIMEOUT)
|
||||
timeout = MAX_TIMEOUT;
|
||||
|
||||
// init the watchdog timer
|
||||
wb_smsc_wdt_initialize();
|
||||
/* init the watchdog timer */
|
||||
wb_smsc_wdt_initialize();
|
||||
|
||||
ret = register_reboot_notifier(&wb_smsc_wdt_notifier);
|
||||
if (ret) {
|
||||
printk(KERN_ERR MODNAME "Unable to register reboot notifier err = %d\n", ret);
|
||||
printk(KERN_ERR MODNAME
|
||||
"Unable to register reboot notifier err = %d\n", ret);
|
||||
goto out_io;
|
||||
}
|
||||
|
||||
ret = misc_register(&wb_smsc_wdt_miscdev);
|
||||
if (ret) {
|
||||
printk(KERN_ERR MODNAME "Unable to register miscdev on minor %d\n", WATCHDOG_MINOR);
|
||||
printk(KERN_ERR MODNAME
|
||||
"Unable to register miscdev on minor %d\n",
|
||||
WATCHDOG_MINOR);
|
||||
goto out_rbt;
|
||||
}
|
||||
|
||||
// output info
|
||||
printk(KERN_INFO MODNAME "Timeout set to %d %s.\n", timeout, (unit == UNIT_SECOND) ? "second(s)" : "minute(s)");
|
||||
printk(KERN_INFO MODNAME "Watchdog initialized and sleeping (nowayout=%d)...\n", nowayout);
|
||||
|
||||
// ret = 0
|
||||
|
||||
/* output info */
|
||||
printk(KERN_INFO MODNAME "Timeout set to %d %s.\n",
|
||||
timeout, (unit == UNIT_SECOND) ? "second(s)" : "minute(s)");
|
||||
printk(KERN_INFO MODNAME
|
||||
"Watchdog initialized and sleeping (nowayout=%d)...\n",
|
||||
nowayout);
|
||||
out_clean:
|
||||
return ret;
|
||||
|
||||
|
|
@ -591,8 +590,7 @@ static int __init wb_smsc_wdt_init(void)
|
|||
static void __exit wb_smsc_wdt_exit(void)
|
||||
{
|
||||
/* Stop the timer before we leave */
|
||||
if (!nowayout)
|
||||
{
|
||||
if (!nowayout) {
|
||||
wb_smsc_wdt_shutdown();
|
||||
printk(KERN_INFO MODNAME "Watchdog disabled.\n");
|
||||
}
|
||||
|
|
@ -601,25 +599,29 @@ static void __exit wb_smsc_wdt_exit(void)
|
|||
unregister_reboot_notifier(&wb_smsc_wdt_notifier);
|
||||
release_region(IOPORT, IOPORT_SIZE);
|
||||
|
||||
printk("SMsC 37B787 watchdog component driver removed.\n");
|
||||
printk(KERN_INFO "SMsC 37B787 watchdog component driver removed.\n");
|
||||
}
|
||||
|
||||
module_init(wb_smsc_wdt_init);
|
||||
module_exit(wb_smsc_wdt_exit);
|
||||
|
||||
MODULE_AUTHOR("Sven Anders <anders@anduras.de>");
|
||||
MODULE_DESCRIPTION("Driver for SMsC 37B787 watchdog component (Version " VERSION ")");
|
||||
MODULE_DESCRIPTION("Driver for SMsC 37B787 watchdog component (Version "
|
||||
VERSION ")");
|
||||
MODULE_LICENSE("GPL");
|
||||
|
||||
MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
|
||||
|
||||
#ifdef SMSC_SUPPORT_MINUTES
|
||||
module_param(unit, int, 0);
|
||||
MODULE_PARM_DESC(unit, "set unit to use, 0=seconds or 1=minutes, default is 0");
|
||||
MODULE_PARM_DESC(unit,
|
||||
"set unit to use, 0=seconds or 1=minutes, default is 0");
|
||||
#endif
|
||||
|
||||
module_param(timeout, int, 0);
|
||||
MODULE_PARM_DESC(timeout, "range is 1-255 units, default is 60");
|
||||
|
||||
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) ")");
|
||||
|
|
|
|||
Loading…
Reference in a new issue