diff options
Diffstat (limited to 'drivers/char/watchdog')
-rw-r--r-- | drivers/char/watchdog/acquirewdt.c | 74 |
1 files changed, 41 insertions, 33 deletions
diff --git a/drivers/char/watchdog/acquirewdt.c b/drivers/char/watchdog/acquirewdt.c index 154d67e591e5..a968f84c353e 100644 --- a/drivers/char/watchdog/acquirewdt.c +++ b/drivers/char/watchdog/acquirewdt.c | |||
@@ -48,46 +48,52 @@ | |||
48 | * It can be 1, 2, 10, 20, 110 or 220 seconds. | 48 | * It can be 1, 2, 10, 20, 110 or 220 seconds. |
49 | */ | 49 | */ |
50 | 50 | ||
51 | #include <linux/module.h> | 51 | /* |
52 | #include <linux/moduleparam.h> | 52 | * Includes, defines, variables, module parameters, ... |
53 | #include <linux/types.h> | 53 | */ |
54 | #include <linux/miscdevice.h> | ||
55 | #include <linux/watchdog.h> | ||
56 | #include <linux/fs.h> | ||
57 | #include <linux/ioport.h> | ||
58 | #include <linux/notifier.h> | ||
59 | #include <linux/reboot.h> | ||
60 | #include <linux/init.h> | ||
61 | |||
62 | #include <asm/io.h> | ||
63 | #include <asm/uaccess.h> | ||
64 | #include <asm/system.h> | ||
65 | 54 | ||
55 | /* Includes */ | ||
56 | #include <linux/module.h> /* For module specific items */ | ||
57 | #include <linux/moduleparam.h> /* For new moduleparam's */ | ||
58 | #include <linux/types.h> /* For standard types (like size_t) */ | ||
59 | #include <linux/errno.h> /* For the -ENODEV/... values */ | ||
60 | #include <linux/kernel.h> /* For printk/panic/... */ | ||
61 | #include <linux/miscdevice.h> /* For MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR) */ | ||
62 | #include <linux/watchdog.h> /* For the watchdog specific items */ | ||
63 | #include <linux/fs.h> /* For file operations */ | ||
64 | #include <linux/ioport.h> /* For io-port access */ | ||
65 | #include <linux/notifier.h> /* For reboot notifier */ | ||
66 | #include <linux/reboot.h> /* For reboot notifier */ | ||
67 | #include <linux/init.h> /* For __init/__exit/... */ | ||
68 | |||
69 | #include <asm/uaccess.h> /* For copy_to_user/put_user/... */ | ||
70 | #include <asm/io.h> /* For inb/outb/... */ | ||
71 | |||
72 | /* Module information */ | ||
73 | #define DRV_NAME "acquirewdt" | ||
74 | #define PFX DRV_NAME ": " | ||
66 | #define WATCHDOG_NAME "Acquire WDT" | 75 | #define WATCHDOG_NAME "Acquire WDT" |
67 | #define PFX WATCHDOG_NAME ": " | ||
68 | #define WATCHDOG_HEARTBEAT 0 /* There is no way to see what the correct time-out period is */ | 76 | #define WATCHDOG_HEARTBEAT 0 /* There is no way to see what the correct time-out period is */ |
69 | 77 | ||
78 | /* internal variables */ | ||
70 | static unsigned long acq_is_open; | 79 | static unsigned long acq_is_open; |
71 | static char expect_close; | 80 | static char expect_close; |
72 | 81 | ||
73 | /* | 82 | /* module parameters */ |
74 | * You must set these - there is no sane way to probe for this board. | 83 | static int wdt_stop = 0x43; /* You must set this - there is no sane way to probe for this board. */ |
75 | */ | ||
76 | |||
77 | static int wdt_stop = 0x43; | ||
78 | module_param(wdt_stop, int, 0); | 84 | module_param(wdt_stop, int, 0); |
79 | MODULE_PARM_DESC(wdt_stop, "Acquire WDT 'stop' io port (default 0x43)"); | 85 | MODULE_PARM_DESC(wdt_stop, "Acquire WDT 'stop' io port (default 0x43)"); |
80 | 86 | ||
81 | static int wdt_start = 0x443; | 87 | static int wdt_start = 0x443; /* You must set this - there is no sane way to probe for this board. */ |
82 | module_param(wdt_start, int, 0); | 88 | module_param(wdt_start, int, 0); |
83 | MODULE_PARM_DESC(wdt_start, "Acquire WDT 'start' io port (default 0x443)"); | 89 | MODULE_PARM_DESC(wdt_start, "Acquire WDT 'start' io port (default 0x443)"); |
84 | 90 | ||
85 | static int nowayout = WATCHDOG_NOWAYOUT; | 91 | static int nowayout = WATCHDOG_NOWAYOUT; |
86 | module_param(nowayout, int, 0); | 92 | module_param(nowayout, int, 0); |
87 | MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)"); | 93 | MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); |
88 | 94 | ||
89 | /* | 95 | /* |
90 | * Kernel methods. | 96 | * Watchdog Operations |
91 | */ | 97 | */ |
92 | 98 | ||
93 | static void acq_keepalive(void) | 99 | static void acq_keepalive(void) |
@@ -103,7 +109,7 @@ static void acq_stop(void) | |||
103 | } | 109 | } |
104 | 110 | ||
105 | /* | 111 | /* |
106 | * /dev/watchdog handling. | 112 | * /dev/watchdog handling |
107 | */ | 113 | */ |
108 | 114 | ||
109 | static ssize_t acq_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) | 115 | static ssize_t acq_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) |
@@ -143,7 +149,7 @@ static int acq_ioctl(struct inode *inode, struct file *file, unsigned int cmd, | |||
143 | { | 149 | { |
144 | .options = WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE, | 150 | .options = WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE, |
145 | .firmware_version = 1, | 151 | .firmware_version = 1, |
146 | .identity = "Acquire WDT", | 152 | .identity = WATCHDOG_NAME, |
147 | }; | 153 | }; |
148 | 154 | ||
149 | switch(cmd) | 155 | switch(cmd) |
@@ -240,11 +246,10 @@ static const struct file_operations acq_fops = { | |||
240 | .release = acq_close, | 246 | .release = acq_close, |
241 | }; | 247 | }; |
242 | 248 | ||
243 | static struct miscdevice acq_miscdev= | 249 | static struct miscdevice acq_miscdev = { |
244 | { | 250 | .minor = WATCHDOG_MINOR, |
245 | .minor = WATCHDOG_MINOR, | 251 | .name = "watchdog", |
246 | .name = "watchdog", | 252 | .fops = &acq_fops, |
247 | .fops = &acq_fops, | ||
248 | }; | 253 | }; |
249 | 254 | ||
250 | /* | 255 | /* |
@@ -252,11 +257,14 @@ static struct miscdevice acq_miscdev= | |||
252 | * turn the timebomb registers off. | 257 | * turn the timebomb registers off. |
253 | */ | 258 | */ |
254 | 259 | ||
255 | static struct notifier_block acq_notifier = | 260 | static struct notifier_block acq_notifier = { |
256 | { | ||
257 | .notifier_call = acq_notify_sys, | 261 | .notifier_call = acq_notify_sys, |
258 | }; | 262 | }; |
259 | 263 | ||
264 | /* | ||
265 | * Init & exit routines | ||
266 | */ | ||
267 | |||
260 | static int __init acq_init(void) | 268 | static int __init acq_init(void) |
261 | { | 269 | { |
262 | int ret; | 270 | int ret; |
@@ -313,9 +321,9 @@ static void __exit acq_exit(void) | |||
313 | { | 321 | { |
314 | misc_deregister(&acq_miscdev); | 322 | misc_deregister(&acq_miscdev); |
315 | unregister_reboot_notifier(&acq_notifier); | 323 | unregister_reboot_notifier(&acq_notifier); |
324 | release_region(wdt_start,1); | ||
316 | if(wdt_stop != wdt_start) | 325 | if(wdt_stop != wdt_start) |
317 | release_region(wdt_stop,1); | 326 | release_region(wdt_stop,1); |
318 | release_region(wdt_start,1); | ||
319 | } | 327 | } |
320 | 328 | ||
321 | module_init(acq_init); | 329 | module_init(acq_init); |