Skip to content
Projects
Groups
Snippets
Help
Loading...
Help
Support
Keyboard shortcuts
?
Submit feedback
Contribute to GitLab
Sign in / Register
Toggle navigation
L
linux
Project overview
Project overview
Details
Activity
Releases
Repository
Repository
Files
Commits
Branches
Tags
Contributors
Graph
Compare
Issues
0
Issues
0
List
Boards
Labels
Milestones
Merge Requests
0
Merge Requests
0
Analytics
Analytics
Repository
Value Stream
Wiki
Wiki
Snippets
Snippets
Members
Members
Collapse sidebar
Close sidebar
Activity
Graph
Create a new issue
Commits
Issue Boards
Open sidebar
Kirill Smelkov
linux
Commits
d87b6141
Commit
d87b6141
authored
Jan 14, 2003
by
Dave Jones
Browse files
Options
Browse Files
Download
Email Patches
Plain Diff
[WATCHDOG] Final 2.4 bits for ib700wdt
parent
950cda48
Changes
1
Hide whitespace changes
Inline
Side-by-side
Showing
1 changed file
with
43 additions
and
16 deletions
+43
-16
drivers/char/watchdog/ib700wdt.c
drivers/char/watchdog/ib700wdt.c
+43
-16
No files found.
drivers/char/watchdog/ib700wdt.c
View file @
d87b6141
...
...
@@ -86,15 +86,32 @@ static int expect_close = 0;
*
*/
static
int
wd_times
[]
=
{
30
,
/* 0x0 */
28
,
/* 0x1 */
26
,
/* 0x2 */
24
,
/* 0x3 */
22
,
/* 0x4 */
20
,
/* 0x5 */
18
,
/* 0x6 */
16
,
/* 0x7 */
14
,
/* 0x8 */
12
,
/* 0x9 */
10
,
/* 0xA */
8
,
/* 0xB */
6
,
/* 0xC */
4
,
/* 0xD */
2
,
/* 0xE */
0
,
/* 0xF */
};
#define WDT_STOP 0x441
#define WDT_START 0x443
/* Default timeout */
#define WD_TIMO 0
/* 30 seconds +/- 20%, from table */
static
int
timeout_val
=
WD_TIMO
;
/* value in table */
static
int
timeout
=
30
;
/* in seconds */
MODULE_PARM
(
timeout
,
"i"
);
MODULE_PARM_DESC
(
timeout
,
"Watchdog timeout in seconds, 0 < n < 30, must be even (default=30)"
);
static
int
wd_margin
=
WD_TIMO
;
#ifdef CONFIG_WATCHDOG_NOWAYOUT
static
int
nowayout
=
1
;
...
...
@@ -105,22 +122,16 @@ static int nowayout = 0;
MODULE_PARM
(
nowayout
,
"i"
);
MODULE_PARM_DESC
(
nowayout
,
"Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)"
);
/*
* Kernel methods.
*/
static
void
__init
ibwdt_validate_timeout
(
void
)
{
timeout_val
=
(
30
-
timeout
)
/
2
;
if
(
timeout_val
<
0
||
timeout_val
>
0xF
)
timeout_val
=
WD_TIMO
;
}
static
void
ibwdt_ping
(
void
)
{
/* Write a watchdog value */
outb_p
(
timeout_val
,
WDT_START
);
outb_p
(
wd_times
[
wd_margin
]
,
WDT_START
);
}
static
ssize_t
...
...
@@ -139,7 +150,6 @@ ibwdt_write(struct file *file, const char *buf, size_t count, loff_t *ppos)
for
(
i
=
0
;
i
!=
count
;
i
++
)
{
char
c
;
if
(
get_user
(
c
,
buf
+
i
))
return
-
EFAULT
;
if
(
c
==
'V'
)
...
...
@@ -162,6 +172,8 @@ static int
ibwdt_ioctl
(
struct
inode
*
inode
,
struct
file
*
file
,
unsigned
int
cmd
,
unsigned
long
arg
)
{
int
i
,
new_margin
;
static
struct
watchdog_info
ident
=
{
.
options
=
WDIOF_KEEPALIVEPING
|
WDIOF_SETTIMEOUT
|
WDIOF_MAGICCLOSE
,
.
firmware_version
=
1
,
...
...
@@ -183,6 +195,22 @@ ibwdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
ibwdt_ping
();
break
;
case
WDIOC_SETTIMEOUT
:
if
(
get_user
(
new_margin
,
(
int
*
)
arg
))
return
-
EFAULT
;
if
((
new_margin
<
0
)
||
(
new_margin
>
30
))
return
-
EINVAL
;
for
(
i
=
0x0F
;
i
>
-
1
;
i
--
)
if
(
wd_times
[
i
]
>
new_margin
)
break
;
wd_margin
=
i
;
ibwdt_ping
();
/* Fall */
case
WDIOC_GETTIMEOUT
:
return
put_user
(
wd_times
[
wd_margin
],
(
int
*
)
arg
);
break
;
default:
return
-
ENOTTY
;
}
...
...
@@ -217,7 +245,7 @@ ibwdt_close(struct inode *inode, struct file *file)
if
(
minor
(
inode
->
i_rdev
)
==
WATCHDOG_MINOR
)
{
spin_lock
(
&
ibwdt_lock
);
if
(
expect_close
)
outb_p
(
timeout_val
,
WDT_STOP
);
outb_p
(
wd_times
[
wd_margin
]
,
WDT_STOP
);
else
printk
(
KERN_CRIT
"WDT device closed unexpectedly. WDT will not stop!
\n
"
);
...
...
@@ -237,7 +265,7 @@ ibwdt_notify_sys(struct notifier_block *this, unsigned long code,
{
if
(
code
==
SYS_DOWN
||
code
==
SYS_HALT
)
{
/* Turn the WDT off */
outb_p
(
timeout_val
,
WDT_STOP
);
outb_p
(
wd_times
[
wd_margin
]
,
WDT_STOP
);
}
return
NOTIFY_DONE
;
}
...
...
@@ -277,7 +305,6 @@ ibwdt_init(void)
{
printk
(
"WDT driver for IB700 single board computer initialising.
\n
"
);
ibwdt_validate_timeout
();
spin_lock_init
(
&
ibwdt_lock
);
if
(
misc_register
(
&
ibwdt_miscdev
))
return
-
ENODEV
;
...
...
Write
Preview
Markdown
is supported
0%
Try again
or
attach a new file
Attach a file
Cancel
You are about to add
0
people
to the discussion. Proceed with caution.
Finish editing this message first!
Cancel
Please
register
or
sign in
to comment