mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 19:00:25 +00:00
![Justin Wheeler](/assets/img/avatar_default.png)
The Jetway JNF99 motherboard features a F71869 SuperIO chip, but its watchdog chipset ID appears to be 1007 (as opposed to 0814). Some testing confirmed it behaves the exact same as 0814. So add this chipset ID to the module's ID list so that the Fintek watchdog driver can correctly identify and access it. Signed-off-by: Justin Wheeler <jwheeler@datademons.com> Acked-by: Giel van Schijndel <me@mortis.eu> Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
820 lines
20 KiB
C
820 lines
20 KiB
C
/***************************************************************************
|
|
* Copyright (C) 2006 by Hans Edgington <hans@edgington.nl> *
|
|
* Copyright (C) 2007-2009 Hans de Goede <hdegoede@redhat.com> *
|
|
* Copyright (C) 2010 Giel van Schijndel <me@mortis.eu> *
|
|
* *
|
|
* 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 program 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 this program; if not, write to the *
|
|
* Free Software Foundation, Inc., *
|
|
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
|
|
***************************************************************************/
|
|
|
|
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
|
|
|
|
#include <linux/err.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/init.h>
|
|
#include <linux/io.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/miscdevice.h>
|
|
#include <linux/module.h>
|
|
#include <linux/mutex.h>
|
|
#include <linux/notifier.h>
|
|
#include <linux/reboot.h>
|
|
#include <linux/uaccess.h>
|
|
#include <linux/watchdog.h>
|
|
|
|
#define DRVNAME "f71808e_wdt"
|
|
|
|
#define SIO_F71808FG_LD_WDT 0x07 /* Watchdog timer logical device */
|
|
#define SIO_UNLOCK_KEY 0x87 /* Key to enable Super-I/O */
|
|
#define SIO_LOCK_KEY 0xAA /* Key to diasble Super-I/O */
|
|
|
|
#define SIO_REG_LDSEL 0x07 /* Logical device select */
|
|
#define SIO_REG_DEVID 0x20 /* Device ID (2 bytes) */
|
|
#define SIO_REG_DEVREV 0x22 /* Device revision */
|
|
#define SIO_REG_MANID 0x23 /* Fintek ID (2 bytes) */
|
|
#define SIO_REG_ROM_ADDR_SEL 0x27 /* ROM address select */
|
|
#define SIO_REG_MFUNCT1 0x29 /* Multi function select 1 */
|
|
#define SIO_REG_MFUNCT2 0x2a /* Multi function select 2 */
|
|
#define SIO_REG_MFUNCT3 0x2b /* Multi function select 3 */
|
|
#define SIO_REG_ENABLE 0x30 /* Logical device enable */
|
|
#define SIO_REG_ADDR 0x60 /* Logical device address (2 bytes) */
|
|
|
|
#define SIO_FINTEK_ID 0x1934 /* Manufacturers ID */
|
|
#define SIO_F71808_ID 0x0901 /* Chipset ID */
|
|
#define SIO_F71858_ID 0x0507 /* Chipset ID */
|
|
#define SIO_F71862_ID 0x0601 /* Chipset ID */
|
|
#define SIO_F71869_ID 0x0814 /* Chipset ID */
|
|
#define SIO_F71869A_ID 0x1007 /* Chipset ID */
|
|
#define SIO_F71882_ID 0x0541 /* Chipset ID */
|
|
#define SIO_F71889_ID 0x0723 /* Chipset ID */
|
|
|
|
#define F71808FG_REG_WDO_CONF 0xf0
|
|
#define F71808FG_REG_WDT_CONF 0xf5
|
|
#define F71808FG_REG_WD_TIME 0xf6
|
|
|
|
#define F71808FG_FLAG_WDOUT_EN 7
|
|
|
|
#define F71808FG_FLAG_WDTMOUT_STS 5
|
|
#define F71808FG_FLAG_WD_EN 5
|
|
#define F71808FG_FLAG_WD_PULSE 4
|
|
#define F71808FG_FLAG_WD_UNIT 3
|
|
|
|
/* Default values */
|
|
#define WATCHDOG_TIMEOUT 60 /* 1 minute default timeout */
|
|
#define WATCHDOG_MAX_TIMEOUT (60 * 255)
|
|
#define WATCHDOG_PULSE_WIDTH 125 /* 125 ms, default pulse width for
|
|
watchdog signal */
|
|
#define WATCHDOG_F71862FG_PIN 63 /* default watchdog reset output
|
|
pin number 63 */
|
|
|
|
static unsigned short force_id;
|
|
module_param(force_id, ushort, 0);
|
|
MODULE_PARM_DESC(force_id, "Override the detected device ID");
|
|
|
|
static const int max_timeout = WATCHDOG_MAX_TIMEOUT;
|
|
static int timeout = WATCHDOG_TIMEOUT; /* default timeout in seconds */
|
|
module_param(timeout, int, 0);
|
|
MODULE_PARM_DESC(timeout,
|
|
"Watchdog timeout in seconds. 1<= timeout <="
|
|
__MODULE_STRING(WATCHDOG_MAX_TIMEOUT) " (default="
|
|
__MODULE_STRING(WATCHDOG_TIMEOUT) ")");
|
|
|
|
static unsigned int pulse_width = WATCHDOG_PULSE_WIDTH;
|
|
module_param(pulse_width, uint, 0);
|
|
MODULE_PARM_DESC(pulse_width,
|
|
"Watchdog signal pulse width. 0(=level), 1 ms, 25 ms, 125 ms or 5000 ms"
|
|
" (default=" __MODULE_STRING(WATCHDOG_PULSE_WIDTH) ")");
|
|
|
|
static unsigned int f71862fg_pin = WATCHDOG_F71862FG_PIN;
|
|
module_param(f71862fg_pin, uint, 0);
|
|
MODULE_PARM_DESC(f71862fg_pin,
|
|
"Watchdog f71862fg reset output pin configuration. Choose pin 56 or 63"
|
|
" (default=" __MODULE_STRING(WATCHDOG_F71862FG_PIN)")");
|
|
|
|
static bool nowayout = WATCHDOG_NOWAYOUT;
|
|
module_param(nowayout, bool, 0444);
|
|
MODULE_PARM_DESC(nowayout, "Disable watchdog shutdown on close");
|
|
|
|
static unsigned int start_withtimeout;
|
|
module_param(start_withtimeout, uint, 0);
|
|
MODULE_PARM_DESC(start_withtimeout, "Start watchdog timer on module load with"
|
|
" given initial timeout. Zero (default) disables this feature.");
|
|
|
|
enum chips { f71808fg, f71858fg, f71862fg, f71869, f71882fg, f71889fg };
|
|
|
|
static const char *f71808e_names[] = {
|
|
"f71808fg",
|
|
"f71858fg",
|
|
"f71862fg",
|
|
"f71869",
|
|
"f71882fg",
|
|
"f71889fg",
|
|
};
|
|
|
|
/* Super-I/O Function prototypes */
|
|
static inline int superio_inb(int base, int reg);
|
|
static inline int superio_inw(int base, int reg);
|
|
static inline void superio_outb(int base, int reg, u8 val);
|
|
static inline void superio_set_bit(int base, int reg, int bit);
|
|
static inline void superio_clear_bit(int base, int reg, int bit);
|
|
static inline int superio_enter(int base);
|
|
static inline void superio_select(int base, int ld);
|
|
static inline void superio_exit(int base);
|
|
|
|
struct watchdog_data {
|
|
unsigned short sioaddr;
|
|
enum chips type;
|
|
unsigned long opened;
|
|
struct mutex lock;
|
|
char expect_close;
|
|
struct watchdog_info ident;
|
|
|
|
unsigned short timeout;
|
|
u8 timer_val; /* content for the wd_time register */
|
|
char minutes_mode;
|
|
u8 pulse_val; /* pulse width flag */
|
|
char pulse_mode; /* enable pulse output mode? */
|
|
char caused_reboot; /* last reboot was by the watchdog */
|
|
};
|
|
|
|
static struct watchdog_data watchdog = {
|
|
.lock = __MUTEX_INITIALIZER(watchdog.lock),
|
|
};
|
|
|
|
/* Super I/O functions */
|
|
static inline int superio_inb(int base, int reg)
|
|
{
|
|
outb(reg, base);
|
|
return inb(base + 1);
|
|
}
|
|
|
|
static int superio_inw(int base, int reg)
|
|
{
|
|
int val;
|
|
val = superio_inb(base, reg) << 8;
|
|
val |= superio_inb(base, reg + 1);
|
|
return val;
|
|
}
|
|
|
|
static inline void superio_outb(int base, int reg, u8 val)
|
|
{
|
|
outb(reg, base);
|
|
outb(val, base + 1);
|
|
}
|
|
|
|
static inline void superio_set_bit(int base, int reg, int bit)
|
|
{
|
|
unsigned long val = superio_inb(base, reg);
|
|
__set_bit(bit, &val);
|
|
superio_outb(base, reg, val);
|
|
}
|
|
|
|
static inline void superio_clear_bit(int base, int reg, int bit)
|
|
{
|
|
unsigned long val = superio_inb(base, reg);
|
|
__clear_bit(bit, &val);
|
|
superio_outb(base, reg, val);
|
|
}
|
|
|
|
static inline int superio_enter(int base)
|
|
{
|
|
/* Don't step on other drivers' I/O space by accident */
|
|
if (!request_muxed_region(base, 2, DRVNAME)) {
|
|
pr_err("I/O address 0x%04x already in use\n", (int)base);
|
|
return -EBUSY;
|
|
}
|
|
|
|
/* according to the datasheet the key must be sent twice! */
|
|
outb(SIO_UNLOCK_KEY, base);
|
|
outb(SIO_UNLOCK_KEY, base);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline void superio_select(int base, int ld)
|
|
{
|
|
outb(SIO_REG_LDSEL, base);
|
|
outb(ld, base + 1);
|
|
}
|
|
|
|
static inline void superio_exit(int base)
|
|
{
|
|
outb(SIO_LOCK_KEY, base);
|
|
release_region(base, 2);
|
|
}
|
|
|
|
static int watchdog_set_timeout(int timeout)
|
|
{
|
|
if (timeout <= 0
|
|
|| timeout > max_timeout) {
|
|
pr_err("watchdog timeout out of range\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
mutex_lock(&watchdog.lock);
|
|
|
|
watchdog.timeout = timeout;
|
|
if (timeout > 0xff) {
|
|
watchdog.timer_val = DIV_ROUND_UP(timeout, 60);
|
|
watchdog.minutes_mode = true;
|
|
} else {
|
|
watchdog.timer_val = timeout;
|
|
watchdog.minutes_mode = false;
|
|
}
|
|
|
|
mutex_unlock(&watchdog.lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int watchdog_set_pulse_width(unsigned int pw)
|
|
{
|
|
int err = 0;
|
|
|
|
mutex_lock(&watchdog.lock);
|
|
|
|
if (pw <= 1) {
|
|
watchdog.pulse_val = 0;
|
|
} else if (pw <= 25) {
|
|
watchdog.pulse_val = 1;
|
|
} else if (pw <= 125) {
|
|
watchdog.pulse_val = 2;
|
|
} else if (pw <= 5000) {
|
|
watchdog.pulse_val = 3;
|
|
} else {
|
|
pr_err("pulse width out of range\n");
|
|
err = -EINVAL;
|
|
goto exit_unlock;
|
|
}
|
|
|
|
watchdog.pulse_mode = pw;
|
|
|
|
exit_unlock:
|
|
mutex_unlock(&watchdog.lock);
|
|
return err;
|
|
}
|
|
|
|
static int watchdog_keepalive(void)
|
|
{
|
|
int err = 0;
|
|
|
|
mutex_lock(&watchdog.lock);
|
|
err = superio_enter(watchdog.sioaddr);
|
|
if (err)
|
|
goto exit_unlock;
|
|
superio_select(watchdog.sioaddr, SIO_F71808FG_LD_WDT);
|
|
|
|
if (watchdog.minutes_mode)
|
|
/* select minutes for timer units */
|
|
superio_set_bit(watchdog.sioaddr, F71808FG_REG_WDT_CONF,
|
|
F71808FG_FLAG_WD_UNIT);
|
|
else
|
|
/* select seconds for timer units */
|
|
superio_clear_bit(watchdog.sioaddr, F71808FG_REG_WDT_CONF,
|
|
F71808FG_FLAG_WD_UNIT);
|
|
|
|
/* Set timer value */
|
|
superio_outb(watchdog.sioaddr, F71808FG_REG_WD_TIME,
|
|
watchdog.timer_val);
|
|
|
|
superio_exit(watchdog.sioaddr);
|
|
|
|
exit_unlock:
|
|
mutex_unlock(&watchdog.lock);
|
|
return err;
|
|
}
|
|
|
|
static int f71862fg_pin_configure(unsigned short ioaddr)
|
|
{
|
|
/* When ioaddr is non-zero the calling function has to take care of
|
|
mutex handling and superio preparation! */
|
|
|
|
if (f71862fg_pin == 63) {
|
|
if (ioaddr) {
|
|
/* SPI must be disabled first to use this pin! */
|
|
superio_clear_bit(ioaddr, SIO_REG_ROM_ADDR_SEL, 6);
|
|
superio_set_bit(ioaddr, SIO_REG_MFUNCT3, 4);
|
|
}
|
|
} else if (f71862fg_pin == 56) {
|
|
if (ioaddr)
|
|
superio_set_bit(ioaddr, SIO_REG_MFUNCT1, 1);
|
|
} else {
|
|
pr_err("Invalid argument f71862fg_pin=%d\n", f71862fg_pin);
|
|
return -EINVAL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int watchdog_start(void)
|
|
{
|
|
/* Make sure we don't die as soon as the watchdog is enabled below */
|
|
int err = watchdog_keepalive();
|
|
if (err)
|
|
return err;
|
|
|
|
mutex_lock(&watchdog.lock);
|
|
err = superio_enter(watchdog.sioaddr);
|
|
if (err)
|
|
goto exit_unlock;
|
|
superio_select(watchdog.sioaddr, SIO_F71808FG_LD_WDT);
|
|
|
|
/* Watchdog pin configuration */
|
|
switch (watchdog.type) {
|
|
case f71808fg:
|
|
/* Set pin 21 to GPIO23/WDTRST#, then to WDTRST# */
|
|
superio_clear_bit(watchdog.sioaddr, SIO_REG_MFUNCT2, 3);
|
|
superio_clear_bit(watchdog.sioaddr, SIO_REG_MFUNCT3, 3);
|
|
break;
|
|
|
|
case f71862fg:
|
|
err = f71862fg_pin_configure(watchdog.sioaddr);
|
|
if (err)
|
|
goto exit_superio;
|
|
break;
|
|
|
|
case f71869:
|
|
/* GPIO14 --> WDTRST# */
|
|
superio_clear_bit(watchdog.sioaddr, SIO_REG_MFUNCT1, 4);
|
|
break;
|
|
|
|
case f71882fg:
|
|
/* Set pin 56 to WDTRST# */
|
|
superio_set_bit(watchdog.sioaddr, SIO_REG_MFUNCT1, 1);
|
|
break;
|
|
|
|
case f71889fg:
|
|
/* set pin 40 to WDTRST# */
|
|
superio_outb(watchdog.sioaddr, SIO_REG_MFUNCT3,
|
|
superio_inb(watchdog.sioaddr, SIO_REG_MFUNCT3) & 0xcf);
|
|
break;
|
|
|
|
default:
|
|
/*
|
|
* 'default' label to shut up the compiler and catch
|
|
* programmer errors
|
|
*/
|
|
err = -ENODEV;
|
|
goto exit_superio;
|
|
}
|
|
|
|
superio_select(watchdog.sioaddr, SIO_F71808FG_LD_WDT);
|
|
superio_set_bit(watchdog.sioaddr, SIO_REG_ENABLE, 0);
|
|
superio_set_bit(watchdog.sioaddr, F71808FG_REG_WDO_CONF,
|
|
F71808FG_FLAG_WDOUT_EN);
|
|
|
|
superio_set_bit(watchdog.sioaddr, F71808FG_REG_WDT_CONF,
|
|
F71808FG_FLAG_WD_EN);
|
|
|
|
if (watchdog.pulse_mode) {
|
|
/* Select "pulse" output mode with given duration */
|
|
u8 wdt_conf = superio_inb(watchdog.sioaddr,
|
|
F71808FG_REG_WDT_CONF);
|
|
|
|
/* Set WD_PSWIDTH bits (1:0) */
|
|
wdt_conf = (wdt_conf & 0xfc) | (watchdog.pulse_val & 0x03);
|
|
/* Set WD_PULSE to "pulse" mode */
|
|
wdt_conf |= BIT(F71808FG_FLAG_WD_PULSE);
|
|
|
|
superio_outb(watchdog.sioaddr, F71808FG_REG_WDT_CONF,
|
|
wdt_conf);
|
|
} else {
|
|
/* Select "level" output mode */
|
|
superio_clear_bit(watchdog.sioaddr, F71808FG_REG_WDT_CONF,
|
|
F71808FG_FLAG_WD_PULSE);
|
|
}
|
|
|
|
exit_superio:
|
|
superio_exit(watchdog.sioaddr);
|
|
exit_unlock:
|
|
mutex_unlock(&watchdog.lock);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int watchdog_stop(void)
|
|
{
|
|
int err = 0;
|
|
|
|
mutex_lock(&watchdog.lock);
|
|
err = superio_enter(watchdog.sioaddr);
|
|
if (err)
|
|
goto exit_unlock;
|
|
superio_select(watchdog.sioaddr, SIO_F71808FG_LD_WDT);
|
|
|
|
superio_clear_bit(watchdog.sioaddr, F71808FG_REG_WDT_CONF,
|
|
F71808FG_FLAG_WD_EN);
|
|
|
|
superio_exit(watchdog.sioaddr);
|
|
|
|
exit_unlock:
|
|
mutex_unlock(&watchdog.lock);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int watchdog_get_status(void)
|
|
{
|
|
int status = 0;
|
|
|
|
mutex_lock(&watchdog.lock);
|
|
status = (watchdog.caused_reboot) ? WDIOF_CARDRESET : 0;
|
|
mutex_unlock(&watchdog.lock);
|
|
|
|
return status;
|
|
}
|
|
|
|
static bool watchdog_is_running(void)
|
|
{
|
|
/*
|
|
* if we fail to determine the watchdog's status assume it to be
|
|
* running to be on the safe side
|
|
*/
|
|
bool is_running = true;
|
|
|
|
mutex_lock(&watchdog.lock);
|
|
if (superio_enter(watchdog.sioaddr))
|
|
goto exit_unlock;
|
|
superio_select(watchdog.sioaddr, SIO_F71808FG_LD_WDT);
|
|
|
|
is_running = (superio_inb(watchdog.sioaddr, SIO_REG_ENABLE) & BIT(0))
|
|
&& (superio_inb(watchdog.sioaddr, F71808FG_REG_WDT_CONF)
|
|
& F71808FG_FLAG_WD_EN);
|
|
|
|
superio_exit(watchdog.sioaddr);
|
|
|
|
exit_unlock:
|
|
mutex_unlock(&watchdog.lock);
|
|
return is_running;
|
|
}
|
|
|
|
/* /dev/watchdog api */
|
|
|
|
static int watchdog_open(struct inode *inode, struct file *file)
|
|
{
|
|
int err;
|
|
|
|
/* If the watchdog is alive we don't need to start it again */
|
|
if (test_and_set_bit(0, &watchdog.opened))
|
|
return -EBUSY;
|
|
|
|
err = watchdog_start();
|
|
if (err) {
|
|
clear_bit(0, &watchdog.opened);
|
|
return err;
|
|
}
|
|
|
|
if (nowayout)
|
|
__module_get(THIS_MODULE);
|
|
|
|
watchdog.expect_close = 0;
|
|
return nonseekable_open(inode, file);
|
|
}
|
|
|
|
static int watchdog_release(struct inode *inode, struct file *file)
|
|
{
|
|
clear_bit(0, &watchdog.opened);
|
|
|
|
if (!watchdog.expect_close) {
|
|
watchdog_keepalive();
|
|
pr_crit("Unexpected close, not stopping watchdog!\n");
|
|
} else if (!nowayout) {
|
|
watchdog_stop();
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* watchdog_write:
|
|
* @file: file handle to the watchdog
|
|
* @buf: buffer to write
|
|
* @count: count of bytes
|
|
* @ppos: pointer to the position to write. No seeks allowed
|
|
*
|
|
* A write to a watchdog device is defined as a keepalive signal. Any
|
|
* write of data will do, as we we don't define content meaning.
|
|
*/
|
|
|
|
static ssize_t watchdog_write(struct file *file, const char __user *buf,
|
|
size_t count, loff_t *ppos)
|
|
{
|
|
if (count) {
|
|
if (!nowayout) {
|
|
size_t i;
|
|
|
|
/* In case it was set long ago */
|
|
bool expect_close = false;
|
|
|
|
for (i = 0; i != count; i++) {
|
|
char c;
|
|
if (get_user(c, buf + i))
|
|
return -EFAULT;
|
|
expect_close = (c == 'V');
|
|
}
|
|
|
|
/* Properly order writes across fork()ed processes */
|
|
mutex_lock(&watchdog.lock);
|
|
watchdog.expect_close = expect_close;
|
|
mutex_unlock(&watchdog.lock);
|
|
}
|
|
|
|
/* someone wrote to us, we should restart timer */
|
|
watchdog_keepalive();
|
|
}
|
|
return count;
|
|
}
|
|
|
|
/*
|
|
* watchdog_ioctl:
|
|
* @inode: inode of the device
|
|
* @file: file handle to the device
|
|
* @cmd: watchdog command
|
|
* @arg: argument pointer
|
|
*
|
|
* The watchdog API defines a common set of functions for all watchdogs
|
|
* according to their available features.
|
|
*/
|
|
static long watchdog_ioctl(struct file *file, unsigned int cmd,
|
|
unsigned long arg)
|
|
{
|
|
int status;
|
|
int new_options;
|
|
int new_timeout;
|
|
union {
|
|
struct watchdog_info __user *ident;
|
|
int __user *i;
|
|
} uarg;
|
|
|
|
uarg.i = (int __user *)arg;
|
|
|
|
switch (cmd) {
|
|
case WDIOC_GETSUPPORT:
|
|
return copy_to_user(uarg.ident, &watchdog.ident,
|
|
sizeof(watchdog.ident)) ? -EFAULT : 0;
|
|
|
|
case WDIOC_GETSTATUS:
|
|
status = watchdog_get_status();
|
|
if (status < 0)
|
|
return status;
|
|
return put_user(status, uarg.i);
|
|
|
|
case WDIOC_GETBOOTSTATUS:
|
|
return put_user(0, uarg.i);
|
|
|
|
case WDIOC_SETOPTIONS:
|
|
if (get_user(new_options, uarg.i))
|
|
return -EFAULT;
|
|
|
|
if (new_options & WDIOS_DISABLECARD)
|
|
watchdog_stop();
|
|
|
|
if (new_options & WDIOS_ENABLECARD)
|
|
return watchdog_start();
|
|
|
|
|
|
case WDIOC_KEEPALIVE:
|
|
watchdog_keepalive();
|
|
return 0;
|
|
|
|
case WDIOC_SETTIMEOUT:
|
|
if (get_user(new_timeout, uarg.i))
|
|
return -EFAULT;
|
|
|
|
if (watchdog_set_timeout(new_timeout))
|
|
return -EINVAL;
|
|
|
|
watchdog_keepalive();
|
|
/* Fall */
|
|
|
|
case WDIOC_GETTIMEOUT:
|
|
return put_user(watchdog.timeout, uarg.i);
|
|
|
|
default:
|
|
return -ENOTTY;
|
|
|
|
}
|
|
}
|
|
|
|
static int watchdog_notify_sys(struct notifier_block *this, unsigned long code,
|
|
void *unused)
|
|
{
|
|
if (code == SYS_DOWN || code == SYS_HALT)
|
|
watchdog_stop();
|
|
return NOTIFY_DONE;
|
|
}
|
|
|
|
static const struct file_operations watchdog_fops = {
|
|
.owner = THIS_MODULE,
|
|
.llseek = no_llseek,
|
|
.open = watchdog_open,
|
|
.release = watchdog_release,
|
|
.write = watchdog_write,
|
|
.unlocked_ioctl = watchdog_ioctl,
|
|
};
|
|
|
|
static struct miscdevice watchdog_miscdev = {
|
|
.minor = WATCHDOG_MINOR,
|
|
.name = "watchdog",
|
|
.fops = &watchdog_fops,
|
|
};
|
|
|
|
static struct notifier_block watchdog_notifier = {
|
|
.notifier_call = watchdog_notify_sys,
|
|
};
|
|
|
|
static int __init watchdog_init(int sioaddr)
|
|
{
|
|
int wdt_conf, err = 0;
|
|
|
|
/* No need to lock watchdog.lock here because no entry points
|
|
* into the module have been registered yet.
|
|
*/
|
|
watchdog.sioaddr = sioaddr;
|
|
watchdog.ident.options = WDIOC_SETTIMEOUT
|
|
| WDIOF_MAGICCLOSE
|
|
| WDIOF_KEEPALIVEPING;
|
|
|
|
snprintf(watchdog.ident.identity,
|
|
sizeof(watchdog.ident.identity), "%s watchdog",
|
|
f71808e_names[watchdog.type]);
|
|
|
|
err = superio_enter(sioaddr);
|
|
if (err)
|
|
return err;
|
|
superio_select(watchdog.sioaddr, SIO_F71808FG_LD_WDT);
|
|
|
|
wdt_conf = superio_inb(sioaddr, F71808FG_REG_WDT_CONF);
|
|
watchdog.caused_reboot = wdt_conf & F71808FG_FLAG_WDTMOUT_STS;
|
|
|
|
superio_exit(sioaddr);
|
|
|
|
err = watchdog_set_timeout(timeout);
|
|
if (err)
|
|
return err;
|
|
err = watchdog_set_pulse_width(pulse_width);
|
|
if (err)
|
|
return err;
|
|
|
|
err = register_reboot_notifier(&watchdog_notifier);
|
|
if (err)
|
|
return err;
|
|
|
|
err = misc_register(&watchdog_miscdev);
|
|
if (err) {
|
|
pr_err("cannot register miscdev on minor=%d\n",
|
|
watchdog_miscdev.minor);
|
|
goto exit_reboot;
|
|
}
|
|
|
|
if (start_withtimeout) {
|
|
if (start_withtimeout <= 0
|
|
|| start_withtimeout > max_timeout) {
|
|
pr_err("starting timeout out of range\n");
|
|
err = -EINVAL;
|
|
goto exit_miscdev;
|
|
}
|
|
|
|
err = watchdog_start();
|
|
if (err) {
|
|
pr_err("cannot start watchdog timer\n");
|
|
goto exit_miscdev;
|
|
}
|
|
|
|
mutex_lock(&watchdog.lock);
|
|
err = superio_enter(sioaddr);
|
|
if (err)
|
|
goto exit_unlock;
|
|
superio_select(watchdog.sioaddr, SIO_F71808FG_LD_WDT);
|
|
|
|
if (start_withtimeout > 0xff) {
|
|
/* select minutes for timer units */
|
|
superio_set_bit(sioaddr, F71808FG_REG_WDT_CONF,
|
|
F71808FG_FLAG_WD_UNIT);
|
|
superio_outb(sioaddr, F71808FG_REG_WD_TIME,
|
|
DIV_ROUND_UP(start_withtimeout, 60));
|
|
} else {
|
|
/* select seconds for timer units */
|
|
superio_clear_bit(sioaddr, F71808FG_REG_WDT_CONF,
|
|
F71808FG_FLAG_WD_UNIT);
|
|
superio_outb(sioaddr, F71808FG_REG_WD_TIME,
|
|
start_withtimeout);
|
|
}
|
|
|
|
superio_exit(sioaddr);
|
|
mutex_unlock(&watchdog.lock);
|
|
|
|
if (nowayout)
|
|
__module_get(THIS_MODULE);
|
|
|
|
pr_info("watchdog started with initial timeout of %u sec\n",
|
|
start_withtimeout);
|
|
}
|
|
|
|
return 0;
|
|
|
|
exit_unlock:
|
|
mutex_unlock(&watchdog.lock);
|
|
exit_miscdev:
|
|
misc_deregister(&watchdog_miscdev);
|
|
exit_reboot:
|
|
unregister_reboot_notifier(&watchdog_notifier);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int __init f71808e_find(int sioaddr)
|
|
{
|
|
u16 devid;
|
|
int err = superio_enter(sioaddr);
|
|
if (err)
|
|
return err;
|
|
|
|
devid = superio_inw(sioaddr, SIO_REG_MANID);
|
|
if (devid != SIO_FINTEK_ID) {
|
|
pr_debug("Not a Fintek device\n");
|
|
err = -ENODEV;
|
|
goto exit;
|
|
}
|
|
|
|
devid = force_id ? force_id : superio_inw(sioaddr, SIO_REG_DEVID);
|
|
switch (devid) {
|
|
case SIO_F71808_ID:
|
|
watchdog.type = f71808fg;
|
|
break;
|
|
case SIO_F71862_ID:
|
|
watchdog.type = f71862fg;
|
|
err = f71862fg_pin_configure(0); /* validate module parameter */
|
|
break;
|
|
case SIO_F71869_ID:
|
|
case SIO_F71869A_ID:
|
|
watchdog.type = f71869;
|
|
break;
|
|
case SIO_F71882_ID:
|
|
watchdog.type = f71882fg;
|
|
break;
|
|
case SIO_F71889_ID:
|
|
watchdog.type = f71889fg;
|
|
break;
|
|
case SIO_F71858_ID:
|
|
/* Confirmed (by datasheet) not to have a watchdog. */
|
|
err = -ENODEV;
|
|
goto exit;
|
|
default:
|
|
pr_info("Unrecognized Fintek device: %04x\n",
|
|
(unsigned int)devid);
|
|
err = -ENODEV;
|
|
goto exit;
|
|
}
|
|
|
|
pr_info("Found %s watchdog chip, revision %d\n",
|
|
f71808e_names[watchdog.type],
|
|
(int)superio_inb(sioaddr, SIO_REG_DEVREV));
|
|
exit:
|
|
superio_exit(sioaddr);
|
|
return err;
|
|
}
|
|
|
|
static int __init f71808e_init(void)
|
|
{
|
|
static const unsigned short addrs[] = { 0x2e, 0x4e };
|
|
int err = -ENODEV;
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(addrs); i++) {
|
|
err = f71808e_find(addrs[i]);
|
|
if (err == 0)
|
|
break;
|
|
}
|
|
if (i == ARRAY_SIZE(addrs))
|
|
return err;
|
|
|
|
return watchdog_init(addrs[i]);
|
|
}
|
|
|
|
static void __exit f71808e_exit(void)
|
|
{
|
|
if (watchdog_is_running()) {
|
|
pr_warn("Watchdog timer still running, stopping it\n");
|
|
watchdog_stop();
|
|
}
|
|
misc_deregister(&watchdog_miscdev);
|
|
unregister_reboot_notifier(&watchdog_notifier);
|
|
}
|
|
|
|
MODULE_DESCRIPTION("F71808E Watchdog Driver");
|
|
MODULE_AUTHOR("Giel van Schijndel <me@mortis.eu>");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
module_init(f71808e_init);
|
|
module_exit(f71808e_exit);
|