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d524c5e2
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d524c5e2
编写于
2月 12, 2006
作者:
L
Linus Torvalds
浏览文件
操作
浏览文件
下载
差异文件
Merge master.kernel.org:/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog
上级
19bf9cbf
a7122f91
变更
2
隐藏空白更改
内联
并排
Showing
2 changed file
with
239 addition
and
223 deletion
+239
-223
drivers/char/watchdog/pcwd.c
drivers/char/watchdog/pcwd.c
+232
-218
drivers/char/watchdog/sa1100_wdt.c
drivers/char/watchdog/sa1100_wdt.c
+7
-5
未找到文件。
drivers/char/watchdog/pcwd.c
浏览文件 @
d524c5e2
...
...
@@ -49,29 +49,37 @@
* More info available at http://www.berkprod.com/ or http://www.pcwatchdog.com/
*/
#include <linux/
module.h>
#include <linux/module
param.h>
#include <linux/
types.h>
#include <linux/t
imer.h>
#include <linux/
jiffies.h>
#include <linux/
config.h>
#include <linux/
wait.h>
#include <linux/
slab.h>
#include <linux/
ioport.h>
#include <linux/
delay.h>
#include <linux/
fs.h>
#include <linux/
miscdevice.h>
#include <linux/
watchdog.h>
#include <linux/
notifier.h>
#include <linux/
init.h>
#include <linux/
spinlock.h>
#include <linux/
reboot.h>
#include <linux/
config.h>
/* For CONFIG_WATCHDOG_NOWAYOUT/... */
#include <linux/module
.h>
/* For module specific items */
#include <linux/
moduleparam.h>
/* For new moduleparam's */
#include <linux/t
ypes.h>
/* For standard types (like size_t) */
#include <linux/
errno.h>
/* For the -ENODEV/... values */
#include <linux/
kernel.h>
/* For printk/panic/... */
#include <linux/
delay.h>
/* For mdelay function */
#include <linux/
timer.h>
/* For timer related operations */
#include <linux/
jiffies.h>
/* For jiffies stuff */
#include <linux/
miscdevice.h>
/* For MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR) */
#include <linux/
watchdog.h>
/* For the watchdog specific items */
#include <linux/
notifier.h>
/* For notifier support */
#include <linux/
reboot.h>
/* For reboot_notifier stuff */
#include <linux/
init.h>
/* For __init/__exit/... */
#include <linux/
fs.h>
/* For file operations */
#include <linux/
ioport.h>
/* For io-port access */
#include <linux/
spinlock.h>
/* For spin_lock/spin_unlock/... */
#include <linux/sched.h>
/* TASK_INTERRUPTIBLE, set_current_state() and friends */
#include <asm/uaccess.h>
#include <asm/io.h>
#include <linux/slab.h>
/* For kmalloc */
#define WD_VER "1.16 (06/12/2004)"
#define PFX "pcwd: "
#include <asm/uaccess.h>
/* For copy_to_user/put_user/... */
#include <asm/io.h>
/* For inb/outb/... */
/* Module and version information */
#define WATCHDOG_VERSION "1.16"
#define WATCHDOG_DATE "03 Jan 2006"
#define WATCHDOG_DRIVER_NAME "ISA-PC Watchdog"
#define WATCHDOG_NAME "pcwd"
#define PFX WATCHDOG_NAME ": "
#define DRIVER_VERSION WATCHDOG_DRIVER_NAME " driver, v" WATCHDOG_VERSION " (" WATCHDOG_DATE ")\n"
#define WD_VER WATCHDOG_VERSION " (" WATCHDOG_DATE ")"
/*
* It should be noted that PCWD_REVISION_B was removed because A and B
...
...
@@ -85,36 +93,38 @@
/*
* These are the defines that describe the control status bits for the
* PC Watchdog card, revision A.
*/
* PCI-PC Watchdog card.
*/
/* Port 1 : Control Status #1 for the PC Watchdog card, revision A. */
#define WD_WDRST 0x01
/* Previously reset state */
#define WD_T110 0x02
/* Temperature overheat sense */
#define WD_HRTBT 0x04
/* Heartbeat sense */
#define WD_RLY2 0x08
/* External relay triggered */
#define WD_SRLY2 0x80
/* Software external relay triggered */
/*
* These are the defines that describe the control status bits for the
* PC Watchdog card, revision C.
*/
/* Port 1 : Control Status #1 for the PC Watchdog card, revision C. */
#define WD_REVC_WTRP 0x01
/* Watchdog Trip status */
#define WD_REVC_HRBT 0x02
/* Watchdog Heartbeat */
#define WD_REVC_TTRP 0x04
/* Temperature Trip status */
/* Port 2 : Control Status #2 */
#define WD_WDIS 0x10
/* Watchdog Disabled */
#define WD_ENTP 0x20
/* Watchdog Enable Temperature Trip */
#define WD_SSEL 0x40
/* Watchdog Switch Select (1:SW1 <-> 0:SW2) */
#define WD_WCMD 0x80
/* Watchdog Command Mode */
/* max. time we give an ISA watchdog card to process a command */
/* 500ms for each 4 bit response (according to spec.) */
#define ISA_COMMAND_TIMEOUT 1000
/* Watchdog's internal commands */
#define CMD_ISA_IDLE
0x00
#define CMD_ISA_VERSION_INTEGER
0x01
#define CMD_ISA_VERSION_TENTH
0x02
#define CMD_ISA_VERSION_HUNDRETH
0x03
#define CMD_ISA_VERSION_MINOR
0x04
#define CMD_ISA_SWITCH_SETTINGS
0x05
#define CMD_ISA_DELAY_TIME_2SECS
0x0A
#define CMD_ISA_DELAY_TIME_4SECS
0x0B
#define CMD_ISA_DELAY_TIME_8SECS
0x0C
#define CMD_ISA_IDLE
0x00
#define CMD_ISA_VERSION_INTEGER
0x01
#define CMD_ISA_VERSION_TENTH
0x02
#define CMD_ISA_VERSION_HUNDRETH
0x03
#define CMD_ISA_VERSION_MINOR
0x04
#define CMD_ISA_SWITCH_SETTINGS
0x05
#define CMD_ISA_DELAY_TIME_2SECS
0x0A
#define CMD_ISA_DELAY_TIME_4SECS
0x0B
#define CMD_ISA_DELAY_TIME_8SECS
0x0C
/*
* We are using an kernel timer to do the pinging of the watchdog
...
...
@@ -130,15 +140,17 @@ static int cards_found;
/* internal variables */
static
atomic_t
open_allowed
=
ATOMIC_INIT
(
1
);
static
char
expect_close
;
static
struct
timer_list
timer
;
static
unsigned
long
next_heartbeat
;
static
int
temp_panic
;
static
int
revision
;
/* The card's revision */
static
int
supports_temp
;
/* Wether or not the card has a temperature device */
static
int
command_mode
;
/* Wether or not the card is in command mode */
static
int
initial_status
;
/* The card's boot status */
static
int
current_readport
;
/* The cards I/O address */
static
spinlock_t
io_lock
;
static
struct
{
/* this is private data for each ISA-PC watchdog card */
int
revision
;
/* The card's revision */
int
supports_temp
;
/* Wether or not the card has a temperature device */
int
command_mode
;
/* Wether or not the card is in command mode */
int
boot_status
;
/* The card's boot status */
int
io_addr
;
/* The cards I/O address */
spinlock_t
io_lock
;
/* the lock for io operations */
struct
timer_list
timer
;
/* The timer that pings the watchdog */
unsigned
long
next_heartbeat
;
/* the next_heartbeat for the timer */
}
pcwd_private
;
/* module parameters */
#define WATCHDOG_HEARTBEAT 60
/* 60 sec default heartbeat */
...
...
@@ -161,14 +173,14 @@ static int send_isa_command(int cmd)
int
port0
,
last_port0
;
/* Double read for stabilising */
/* The WCMD bit must be 1 and the command is only 4 bits in size */
control_status
=
(
cmd
&
0x0F
)
|
0x80
;
outb_p
(
control_status
,
current_readport
+
2
);
control_status
=
(
cmd
&
0x0F
)
|
WD_WCMD
;
outb_p
(
control_status
,
pcwd_private
.
io_addr
+
2
);
udelay
(
ISA_COMMAND_TIMEOUT
);
port0
=
inb_p
(
current_readport
);
port0
=
inb_p
(
pcwd_private
.
io_addr
);
for
(
i
=
0
;
i
<
25
;
++
i
)
{
last_port0
=
port0
;
port0
=
inb_p
(
current_readport
);
port0
=
inb_p
(
pcwd_private
.
io_addr
);
if
(
port0
==
last_port0
)
break
;
/* Data is stable */
...
...
@@ -184,7 +196,7 @@ static int set_command_mode(void)
int
i
,
found
=
0
,
count
=
0
;
/* Set the card into command mode */
spin_lock
(
&
io_lock
);
spin_lock
(
&
pcwd_private
.
io_lock
);
while
((
!
found
)
&&
(
count
<
3
))
{
i
=
send_isa_command
(
CMD_ISA_IDLE
);
...
...
@@ -192,15 +204,15 @@ static int set_command_mode(void)
found
=
1
;
else
if
(
i
==
0xF3
)
{
/* Card does not like what we've done to it */
outb_p
(
0x00
,
current_readport
+
2
);
outb_p
(
0x00
,
pcwd_private
.
io_addr
+
2
);
udelay
(
1200
);
/* Spec says wait 1ms */
outb_p
(
0x00
,
current_readport
+
2
);
outb_p
(
0x00
,
pcwd_private
.
io_addr
+
2
);
udelay
(
ISA_COMMAND_TIMEOUT
);
}
count
++
;
}
spin_unlock
(
&
io_lock
);
command_mode
=
found
;
spin_unlock
(
&
pcwd_private
.
io_lock
);
pcwd_private
.
command_mode
=
found
;
return
(
found
);
}
...
...
@@ -208,12 +220,95 @@ static int set_command_mode(void)
static
void
unset_command_mode
(
void
)
{
/* Set the card into normal mode */
spin_lock
(
&
io_lock
);
outb_p
(
0x00
,
current_readport
+
2
);
spin_lock
(
&
pcwd_private
.
io_lock
);
outb_p
(
0x00
,
pcwd_private
.
io_addr
+
2
);
udelay
(
ISA_COMMAND_TIMEOUT
);
spin_unlock
(
&
io_lock
);
spin_unlock
(
&
pcwd_private
.
io_lock
);
pcwd_private
.
command_mode
=
0
;
}
static
inline
void
pcwd_check_temperature_support
(
void
)
{
if
(
inb
(
pcwd_private
.
io_addr
)
!=
0xF0
)
pcwd_private
.
supports_temp
=
1
;
}
static
inline
char
*
get_firmware
(
void
)
{
int
one
,
ten
,
hund
,
minor
;
char
*
ret
;
ret
=
kmalloc
(
6
,
GFP_KERNEL
);
if
(
ret
==
NULL
)
return
NULL
;
if
(
set_command_mode
())
{
one
=
send_isa_command
(
CMD_ISA_VERSION_INTEGER
);
ten
=
send_isa_command
(
CMD_ISA_VERSION_TENTH
);
hund
=
send_isa_command
(
CMD_ISA_VERSION_HUNDRETH
);
minor
=
send_isa_command
(
CMD_ISA_VERSION_MINOR
);
sprintf
(
ret
,
"%c.%c%c%c"
,
one
,
ten
,
hund
,
minor
);
}
else
sprintf
(
ret
,
"ERROR"
);
unset_command_mode
();
return
(
ret
);
}
static
inline
int
pcwd_get_option_switches
(
void
)
{
int
option_switches
=
0
;
if
(
set_command_mode
())
{
/* Get switch settings */
option_switches
=
send_isa_command
(
CMD_ISA_SWITCH_SETTINGS
);
}
unset_command_mode
();
return
(
option_switches
);
}
static
void
pcwd_show_card_info
(
void
)
{
char
*
firmware
;
int
option_switches
;
/* Get some extra info from the hardware (in command/debug/diag mode) */
if
(
pcwd_private
.
revision
==
PCWD_REVISION_A
)
printk
(
KERN_INFO
PFX
"ISA-PC Watchdog (REV.A) detected at port 0x%04x
\n
"
,
pcwd_private
.
io_addr
);
else
if
(
pcwd_private
.
revision
==
PCWD_REVISION_C
)
{
firmware
=
get_firmware
();
printk
(
KERN_INFO
PFX
"ISA-PC Watchdog (REV.C) detected at port 0x%04x (Firmware version: %s)
\n
"
,
pcwd_private
.
io_addr
,
firmware
);
kfree
(
firmware
);
option_switches
=
pcwd_get_option_switches
();
printk
(
KERN_INFO
PFX
"Option switches (0x%02x): Temperature Reset Enable=%s, Power On Delay=%s
\n
"
,
option_switches
,
((
option_switches
&
0x10
)
?
"ON"
:
"OFF"
),
((
option_switches
&
0x08
)
?
"ON"
:
"OFF"
));
/* Reprogram internal heartbeat to 2 seconds */
if
(
set_command_mode
())
{
send_isa_command
(
CMD_ISA_DELAY_TIME_2SECS
);
unset_command_mode
();
}
}
if
(
pcwd_private
.
supports_temp
)
printk
(
KERN_INFO
PFX
"Temperature Option Detected
\n
"
);
if
(
pcwd_private
.
boot_status
&
WDIOF_CARDRESET
)
printk
(
KERN_INFO
PFX
"Previous reboot was caused by the card
\n
"
);
if
(
pcwd_private
.
boot_status
&
WDIOF_OVERHEAT
)
{
printk
(
KERN_EMERG
PFX
"Card senses a CPU Overheat. Panicking!
\n
"
);
printk
(
KERN_EMERG
PFX
"CPU Overheat
\n
"
);
}
command_mode
=
0
;
if
(
pcwd_private
.
boot_status
==
0
)
printk
(
KERN_INFO
PFX
"No previous trip detected - Cold boot or reset
\n
"
);
}
static
void
pcwd_timer_ping
(
unsigned
long
data
)
...
...
@@ -222,25 +317,25 @@ static void pcwd_timer_ping(unsigned long data)
/* If we got a heartbeat pulse within the WDT_INTERVAL
* we agree to ping the WDT */
if
(
time_before
(
jiffies
,
next_heartbeat
))
{
if
(
time_before
(
jiffies
,
pcwd_private
.
next_heartbeat
))
{
/* Ping the watchdog */
spin_lock
(
&
io_lock
);
if
(
revision
==
PCWD_REVISION_A
)
{
spin_lock
(
&
pcwd_private
.
io_lock
);
if
(
pcwd_private
.
revision
==
PCWD_REVISION_A
)
{
/* Rev A cards are reset by setting the WD_WDRST bit in register 1 */
wdrst_stat
=
inb_p
(
current_readport
);
wdrst_stat
=
inb_p
(
pcwd_private
.
io_addr
);
wdrst_stat
&=
0x0F
;
wdrst_stat
|=
WD_WDRST
;
outb_p
(
wdrst_stat
,
current_readport
+
1
);
outb_p
(
wdrst_stat
,
pcwd_private
.
io_addr
+
1
);
}
else
{
/* Re-trigger watchdog by writing to port 0 */
outb_p
(
0x00
,
current_readport
);
outb_p
(
0x00
,
pcwd_private
.
io_addr
);
}
/* Re-set the timer interval */
mod_timer
(
&
timer
,
jiffies
+
WDT_INTERVAL
);
mod_timer
(
&
pcwd_private
.
timer
,
jiffies
+
WDT_INTERVAL
);
spin_unlock
(
&
io_lock
);
spin_unlock
(
&
pcwd_private
.
io_lock
);
}
else
{
printk
(
KERN_WARNING
PFX
"Heartbeat lost! Will not ping the watchdog
\n
"
);
}
...
...
@@ -250,19 +345,19 @@ static int pcwd_start(void)
{
int
stat_reg
;
next_heartbeat
=
jiffies
+
(
heartbeat
*
HZ
);
pcwd_private
.
next_heartbeat
=
jiffies
+
(
heartbeat
*
HZ
);
/* Start the timer */
mod_timer
(
&
timer
,
jiffies
+
WDT_INTERVAL
);
mod_timer
(
&
pcwd_private
.
timer
,
jiffies
+
WDT_INTERVAL
);
/* Enable the port */
if
(
revision
==
PCWD_REVISION_C
)
{
spin_lock
(
&
io_lock
);
outb_p
(
0x00
,
current_readport
+
3
);
if
(
pcwd_private
.
revision
==
PCWD_REVISION_C
)
{
spin_lock
(
&
pcwd_private
.
io_lock
);
outb_p
(
0x00
,
pcwd_private
.
io_addr
+
3
);
udelay
(
ISA_COMMAND_TIMEOUT
);
stat_reg
=
inb_p
(
current_readport
+
2
);
spin_unlock
(
&
io_lock
);
if
(
stat_reg
&
0x10
)
{
stat_reg
=
inb_p
(
pcwd_private
.
io_addr
+
2
);
spin_unlock
(
&
pcwd_private
.
io_lock
);
if
(
stat_reg
&
WD_WDIS
)
{
printk
(
KERN_INFO
PFX
"Could not start watchdog
\n
"
);
return
-
EIO
;
}
...
...
@@ -275,18 +370,18 @@ static int pcwd_stop(void)
int
stat_reg
;
/* Stop the timer */
del_timer
(
&
timer
);
del_timer
(
&
pcwd_private
.
timer
);
/* Disable the board */
if
(
revision
==
PCWD_REVISION_C
)
{
spin_lock
(
&
io_lock
);
outb_p
(
0xA5
,
current_readport
+
3
);
if
(
pcwd_private
.
revision
==
PCWD_REVISION_C
)
{
spin_lock
(
&
pcwd_private
.
io_lock
);
outb_p
(
0xA5
,
pcwd_private
.
io_addr
+
3
);
udelay
(
ISA_COMMAND_TIMEOUT
);
outb_p
(
0xA5
,
current_readport
+
3
);
outb_p
(
0xA5
,
pcwd_private
.
io_addr
+
3
);
udelay
(
ISA_COMMAND_TIMEOUT
);
stat_reg
=
inb_p
(
current_readport
+
2
);
spin_unlock
(
&
io_lock
);
if
((
stat_reg
&
0x10
)
==
0
)
{
stat_reg
=
inb_p
(
pcwd_private
.
io_addr
+
2
);
spin_unlock
(
&
pcwd_private
.
io_lock
);
if
((
stat_reg
&
WD_WDIS
)
==
0
)
{
printk
(
KERN_INFO
PFX
"Could not stop watchdog
\n
"
);
return
-
EIO
;
}
...
...
@@ -297,7 +392,7 @@ static int pcwd_stop(void)
static
int
pcwd_keepalive
(
void
)
{
/* user land ping */
next_heartbeat
=
jiffies
+
(
heartbeat
*
HZ
);
pcwd_private
.
next_heartbeat
=
jiffies
+
(
heartbeat
*
HZ
);
return
0
;
}
...
...
@@ -315,23 +410,23 @@ static int pcwd_get_status(int *status)
int
card_status
;
*
status
=
0
;
spin_lock
(
&
io_lock
);
if
(
revision
==
PCWD_REVISION_A
)
spin_lock
(
&
pcwd_private
.
io_lock
);
if
(
pcwd_private
.
revision
==
PCWD_REVISION_A
)
/* Rev A cards return status information from
* the base register, which is used for the
* temperature in other cards. */
card_status
=
inb
(
current_readport
);
card_status
=
inb
(
pcwd_private
.
io_addr
);
else
{
/* Rev C cards return card status in the base
* address + 1 register. And use different bits
* to indicate a card initiated reset, and an
* over-temperature condition. And the reboot
* status can be reset. */
card_status
=
inb
(
current_readport
+
1
);
card_status
=
inb
(
pcwd_private
.
io_addr
+
1
);
}
spin_unlock
(
&
io_lock
);
spin_unlock
(
&
pcwd_private
.
io_lock
);
if
(
revision
==
PCWD_REVISION_A
)
{
if
(
pcwd_private
.
revision
==
PCWD_REVISION_A
)
{
if
(
card_status
&
WD_WDRST
)
*
status
|=
WDIOF_CARDRESET
;
...
...
@@ -360,10 +455,10 @@ static int pcwd_get_status(int *status)
static
int
pcwd_clear_status
(
void
)
{
if
(
revision
==
PCWD_REVISION_C
)
{
spin_lock
(
&
io_lock
);
outb_p
(
0x00
,
current_readport
+
1
);
/* clear reset status */
spin_unlock
(
&
io_lock
);
if
(
pcwd_private
.
revision
==
PCWD_REVISION_C
)
{
spin_lock
(
&
pcwd_private
.
io_lock
);
outb_p
(
0x00
,
pcwd_private
.
io_addr
+
1
);
/* clear reset status */
spin_unlock
(
&
pcwd_private
.
io_lock
);
}
return
0
;
}
...
...
@@ -371,20 +466,20 @@ static int pcwd_clear_status(void)
static
int
pcwd_get_temperature
(
int
*
temperature
)
{
/* check that port 0 gives temperature info and no command results */
if
(
command_mode
)
if
(
pcwd_private
.
command_mode
)
return
-
1
;
*
temperature
=
0
;
if
(
!
supports_temp
)
if
(
!
pcwd_private
.
supports_temp
)
return
-
ENODEV
;
/*
* Convert celsius to fahrenheit, since this was
* the decided 'standard' for this return value.
*/
spin_lock
(
&
io_lock
);
*
temperature
=
((
inb
(
current_readport
))
*
9
/
5
)
+
32
;
spin_unlock
(
&
io_lock
);
spin_lock
(
&
pcwd_private
.
io_lock
);
*
temperature
=
((
inb
(
pcwd_private
.
io_addr
))
*
9
/
5
)
+
32
;
spin_unlock
(
&
pcwd_private
.
io_lock
);
return
0
;
}
...
...
@@ -425,7 +520,7 @@ static int pcwd_ioctl(struct inode *inode, struct file *file,
return
put_user
(
status
,
argp
);
case
WDIOC_GETBOOTSTATUS
:
return
put_user
(
initial
_status
,
argp
);
return
put_user
(
pcwd_private
.
boot
_status
,
argp
);
case
WDIOC_GETTEMP
:
if
(
pcwd_get_temperature
(
&
temperature
))
...
...
@@ -434,7 +529,7 @@ static int pcwd_ioctl(struct inode *inode, struct file *file,
return
put_user
(
temperature
,
argp
);
case
WDIOC_SETOPTIONS
:
if
(
revision
==
PCWD_REVISION_C
)
if
(
pcwd_private
.
revision
==
PCWD_REVISION_C
)
{
if
(
copy_from_user
(
&
rv
,
argp
,
sizeof
(
int
)))
return
-
EFAULT
;
...
...
@@ -550,7 +645,7 @@ static ssize_t pcwd_temp_read(struct file *file, char __user *buf, size_t count,
static
int
pcwd_temp_open
(
struct
inode
*
inode
,
struct
file
*
file
)
{
if
(
!
supports_temp
)
if
(
!
pcwd_private
.
supports_temp
)
return
-
ENODEV
;
return
nonseekable_open
(
inode
,
file
);
...
...
@@ -616,68 +711,24 @@ static struct notifier_block pcwd_notifier = {
* Init & exit routines
*/
static
inline
void
get_support
(
void
)
{
if
(
inb
(
current_readport
)
!=
0xF0
)
supports_temp
=
1
;
}
static
inline
int
get_revision
(
void
)
{
int
r
=
PCWD_REVISION_C
;
spin_lock
(
&
io_lock
);
spin_lock
(
&
pcwd_private
.
io_lock
);
/* REV A cards use only 2 io ports; test
* presumes a floating bus reads as 0xff. */
if
((
inb
(
current_readport
+
2
)
==
0xFF
)
||
(
inb
(
current_readport
+
3
)
==
0xFF
))
if
((
inb
(
pcwd_private
.
io_addr
+
2
)
==
0xFF
)
||
(
inb
(
pcwd_private
.
io_addr
+
3
)
==
0xFF
))
r
=
PCWD_REVISION_A
;
spin_unlock
(
&
io_lock
);
spin_unlock
(
&
pcwd_private
.
io_lock
);
return
r
;
}
static
inline
char
*
get_firmware
(
void
)
{
int
one
,
ten
,
hund
,
minor
;
char
*
ret
;
ret
=
kmalloc
(
6
,
GFP_KERNEL
);
if
(
ret
==
NULL
)
return
NULL
;
if
(
set_command_mode
())
{
one
=
send_isa_command
(
CMD_ISA_VERSION_INTEGER
);
ten
=
send_isa_command
(
CMD_ISA_VERSION_TENTH
);
hund
=
send_isa_command
(
CMD_ISA_VERSION_HUNDRETH
);
minor
=
send_isa_command
(
CMD_ISA_VERSION_MINOR
);
sprintf
(
ret
,
"%c.%c%c%c"
,
one
,
ten
,
hund
,
minor
);
}
else
sprintf
(
ret
,
"ERROR"
);
unset_command_mode
();
return
(
ret
);
}
static
inline
int
get_option_switches
(
void
)
{
int
rv
=
0
;
if
(
set_command_mode
())
{
/* Get switch settings */
rv
=
send_isa_command
(
CMD_ISA_SWITCH_SETTINGS
);
}
unset_command_mode
();
return
(
rv
);
}
static
int
__devinit
pcwatchdog_init
(
int
base_addr
)
{
int
ret
;
char
*
firmware
;
int
option_switches
;
cards_found
++
;
if
(
cards_found
==
1
)
...
...
@@ -692,104 +743,66 @@ static int __devinit pcwatchdog_init(int base_addr)
printk
(
KERN_ERR
PFX
"No I/O-Address for card detected
\n
"
);
return
-
ENODEV
;
}
current_readport
=
base_addr
;
pcwd_private
.
io_addr
=
base_addr
;
/* Check card's revision */
revision
=
get_revision
();
pcwd_private
.
revision
=
get_revision
();
if
(
!
request_region
(
current_readport
,
(
revision
==
PCWD_REVISION_A
)
?
2
:
4
,
"PCWD"
))
{
if
(
!
request_region
(
pcwd_private
.
io_addr
,
(
pcwd_private
.
revision
==
PCWD_REVISION_A
)
?
2
:
4
,
"PCWD"
))
{
printk
(
KERN_ERR
PFX
"I/O address 0x%04x already in use
\n
"
,
current_readport
);
current_readport
=
0x0000
;
pcwd_private
.
io_addr
);
pcwd_private
.
io_addr
=
0x0000
;
return
-
EIO
;
}
/* Initial variables */
supports_temp
=
0
;
pcwd_private
.
supports_temp
=
0
;
temp_panic
=
0
;
initial
_status
=
0x0000
;
pcwd_private
.
boot
_status
=
0x0000
;
/* get the boot_status */
pcwd_get_status
(
&
initial
_status
);
pcwd_get_status
(
&
pcwd_private
.
boot
_status
);
/* clear the "card caused reboot" flag */
pcwd_clear_status
();
init_timer
(
&
timer
);
timer
.
function
=
pcwd_timer_ping
;
timer
.
data
=
0
;
init_timer
(
&
pcwd_private
.
timer
);
pcwd_private
.
timer
.
function
=
pcwd_timer_ping
;
pcwd_private
.
timer
.
data
=
0
;
/* Disable the board */
pcwd_stop
();
/* Check whether or not the card supports the temperature device */
get_support
();
/* Get some extra info from the hardware (in command/debug/diag mode) */
if
(
revision
==
PCWD_REVISION_A
)
printk
(
KERN_INFO
PFX
"ISA-PC Watchdog (REV.A) detected at port 0x%04x
\n
"
,
current_readport
);
else
if
(
revision
==
PCWD_REVISION_C
)
{
firmware
=
get_firmware
();
printk
(
KERN_INFO
PFX
"ISA-PC Watchdog (REV.C) detected at port 0x%04x (Firmware version: %s)
\n
"
,
current_readport
,
firmware
);
kfree
(
firmware
);
option_switches
=
get_option_switches
();
printk
(
KERN_INFO
PFX
"Option switches (0x%02x): Temperature Reset Enable=%s, Power On Delay=%s
\n
"
,
option_switches
,
((
option_switches
&
0x10
)
?
"ON"
:
"OFF"
),
((
option_switches
&
0x08
)
?
"ON"
:
"OFF"
));
/* Reprogram internal heartbeat to 2 seconds */
if
(
set_command_mode
())
{
send_isa_command
(
CMD_ISA_DELAY_TIME_2SECS
);
unset_command_mode
();
}
}
else
{
/* Should NEVER happen, unless get_revision() fails. */
printk
(
KERN_INFO
PFX
"Unable to get revision
\n
"
);
release_region
(
current_readport
,
(
revision
==
PCWD_REVISION_A
)
?
2
:
4
);
current_readport
=
0x0000
;
return
-
1
;
}
pcwd_check_temperature_support
();
if
(
supports_temp
)
printk
(
KERN_INFO
PFX
"Temperature Option Detected
\n
"
);
if
(
initial_status
&
WDIOF_CARDRESET
)
printk
(
KERN_INFO
PFX
"Previous reboot was caused by the card
\n
"
);
if
(
initial_status
&
WDIOF_OVERHEAT
)
{
printk
(
KERN_EMERG
PFX
"Card senses a CPU Overheat. Panicking!
\n
"
);
printk
(
KERN_EMERG
PFX
"CPU Overheat
\n
"
);
}
if
(
initial_status
==
0
)
printk
(
KERN_INFO
PFX
"No previous trip detected - Cold boot or reset
\n
"
);
/* Show info about the card itself */
pcwd_show_card_info
();
/* Check that the heartbeat value is within it's range ; if not reset to the default */
if
(
pcwd_set_heartbeat
(
heartbeat
))
{
pcwd_set_heartbeat
(
WATCHDOG_HEARTBEAT
);
printk
(
KERN_INFO
PFX
"heartbeat value must be 2<=heartbeat<=7200, using %d
\n
"
,
WATCHDOG_HEARTBEAT
);
if
(
pcwd_set_heartbeat
(
heartbeat
))
{
pcwd_set_heartbeat
(
WATCHDOG_HEARTBEAT
);
printk
(
KERN_INFO
PFX
"heartbeat value must be 2<=heartbeat<=7200, using %d
\n
"
,
WATCHDOG_HEARTBEAT
);
}
ret
=
register_reboot_notifier
(
&
pcwd_notifier
);
if
(
ret
)
{
printk
(
KERN_ERR
PFX
"cannot register reboot notifier (err=%d)
\n
"
,
ret
);
release_region
(
current_readport
,
(
revision
==
PCWD_REVISION_A
)
?
2
:
4
);
current_readport
=
0x0000
;
release_region
(
pcwd_private
.
io_addr
,
(
pcwd_private
.
revision
==
PCWD_REVISION_A
)
?
2
:
4
);
pcwd_private
.
io_addr
=
0x0000
;
return
ret
;
}
if
(
supports_temp
)
{
if
(
pcwd_private
.
supports_temp
)
{
ret
=
misc_register
(
&
temp_miscdev
);
if
(
ret
)
{
printk
(
KERN_ERR
PFX
"cannot register miscdev on minor=%d (err=%d)
\n
"
,
TEMP_MINOR
,
ret
);
unregister_reboot_notifier
(
&
pcwd_notifier
);
release_region
(
current_readport
,
(
revision
==
PCWD_REVISION_A
)
?
2
:
4
);
current_readport
=
0x0000
;
release_region
(
pcwd_private
.
io_addr
,
(
pcwd_private
.
revision
==
PCWD_REVISION_A
)
?
2
:
4
);
pcwd_private
.
io_addr
=
0x0000
;
return
ret
;
}
}
...
...
@@ -798,11 +811,11 @@ static int __devinit pcwatchdog_init(int base_addr)
if
(
ret
)
{
printk
(
KERN_ERR
PFX
"cannot register miscdev on minor=%d (err=%d)
\n
"
,
WATCHDOG_MINOR
,
ret
);
if
(
supports_temp
)
if
(
pcwd_private
.
supports_temp
)
misc_deregister
(
&
temp_miscdev
);
unregister_reboot_notifier
(
&
pcwd_notifier
);
release_region
(
current_readport
,
(
revision
==
PCWD_REVISION_A
)
?
2
:
4
);
current_readport
=
0x0000
;
release_region
(
pcwd_private
.
io_addr
,
(
pcwd_private
.
revision
==
PCWD_REVISION_A
)
?
2
:
4
);
pcwd_private
.
io_addr
=
0x0000
;
return
ret
;
}
...
...
@@ -820,11 +833,12 @@ static void __devexit pcwatchdog_exit(void)
/* Deregister */
misc_deregister
(
&
pcwd_miscdev
);
if
(
supports_temp
)
if
(
pcwd_private
.
supports_temp
)
misc_deregister
(
&
temp_miscdev
);
unregister_reboot_notifier
(
&
pcwd_notifier
);
release_region
(
current_readport
,
(
revision
==
PCWD_REVISION_A
)
?
2
:
4
);
current_readport
=
0x0000
;
release_region
(
pcwd_private
.
io_addr
,
(
pcwd_private
.
revision
==
PCWD_REVISION_A
)
?
2
:
4
);
pcwd_private
.
io_addr
=
0x0000
;
cards_found
--
;
}
/*
...
...
@@ -887,7 +901,7 @@ static int __init pcwd_init_module(void)
{
int
i
,
found
=
0
;
spin_lock_init
(
&
io_lock
);
spin_lock_init
(
&
pcwd_private
.
io_lock
);
for
(
i
=
0
;
pcwd_ioports
[
i
]
!=
0
;
i
++
)
{
if
(
pcwd_checkcard
(
pcwd_ioports
[
i
]))
{
...
...
@@ -906,7 +920,7 @@ static int __init pcwd_init_module(void)
static
void
__exit
pcwd_cleanup_module
(
void
)
{
if
(
current_readport
)
if
(
pcwd_private
.
io_addr
)
pcwatchdog_exit
();
return
;
}
...
...
drivers/char/watchdog/sa1100_wdt.c
浏览文件 @
d524c5e2
...
...
@@ -93,23 +93,25 @@ static int sa1100dog_ioctl(struct inode *inode, struct file *file,
{
int
ret
=
-
ENOIOCTLCMD
;
int
time
;
void
__user
*
argp
=
(
void
__user
*
)
arg
;
int
__user
*
p
=
argp
;
switch
(
cmd
)
{
case
WDIOC_GETSUPPORT
:
ret
=
copy_to_user
(
(
struct
watchdog_info
__user
*
)
arg
,
&
ident
,
ret
=
copy_to_user
(
argp
,
&
ident
,
sizeof
(
ident
))
?
-
EFAULT
:
0
;
break
;
case
WDIOC_GETSTATUS
:
ret
=
put_user
(
0
,
(
int
__user
*
)
arg
);
ret
=
put_user
(
0
,
p
);
break
;
case
WDIOC_GETBOOTSTATUS
:
ret
=
put_user
(
boot_status
,
(
int
__user
*
)
arg
);
ret
=
put_user
(
boot_status
,
p
);
break
;
case
WDIOC_SETTIMEOUT
:
ret
=
get_user
(
time
,
(
int
__user
*
)
arg
);
ret
=
get_user
(
time
,
p
);
if
(
ret
)
break
;
...
...
@@ -123,7 +125,7 @@ static int sa1100dog_ioctl(struct inode *inode, struct file *file,
/*fall through*/
case
WDIOC_GETTIMEOUT
:
ret
=
put_user
(
pre_margin
/
OSCR_FREQ
,
(
int
__user
*
)
arg
);
ret
=
put_user
(
pre_margin
/
OSCR_FREQ
,
p
);
break
;
case
WDIOC_KEEPALIVE
:
...
...
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