aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/watchdog
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/watchdog')
-rw-r--r--drivers/watchdog/Kconfig13
-rw-r--r--drivers/watchdog/Makefile1
-rw-r--r--drivers/watchdog/bfin_wdt.c111
-rw-r--r--drivers/watchdog/booke_wdt.c88
-rw-r--r--drivers/watchdog/geodewdt.c308
-rw-r--r--drivers/watchdog/hpwdt.c155
-rw-r--r--drivers/watchdog/iTCO_wdt.c14
-rw-r--r--drivers/watchdog/w83697hf_wdt.c38
8 files changed, 552 insertions, 176 deletions
diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index 254d115cafab..ccb78f66c2b6 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -295,6 +295,19 @@ config ALIM7101_WDT
295 295
296 Most people will say N. 296 Most people will say N.
297 297
298config GEODE_WDT
299 tristate "AMD Geode CS5535/CS5536 Watchdog"
300 depends on MGEODE_LX
301 help
302 This driver enables a watchdog capability built into the
303 CS5535/CS5536 companion chips for the AMD Geode GX and LX
304 processors. This watchdog watches your kernel to make sure
305 it doesn't freeze, and if it does, it reboots your computer after
306 a certain amount of time.
307
308 You can compile this driver directly into the kernel, or use
309 it as a module. The module will be called geodewdt.
310
298config SC520_WDT 311config SC520_WDT
299 tristate "AMD Elan SC520 processor Watchdog" 312 tristate "AMD Elan SC520 processor Watchdog"
300 depends on X86 313 depends on X86
diff --git a/drivers/watchdog/Makefile b/drivers/watchdog/Makefile
index f3fb170fe5c6..25b352b664d9 100644
--- a/drivers/watchdog/Makefile
+++ b/drivers/watchdog/Makefile
@@ -59,6 +59,7 @@ obj-$(CONFIG_ACQUIRE_WDT) += acquirewdt.o
59obj-$(CONFIG_ADVANTECH_WDT) += advantechwdt.o 59obj-$(CONFIG_ADVANTECH_WDT) += advantechwdt.o
60obj-$(CONFIG_ALIM1535_WDT) += alim1535_wdt.o 60obj-$(CONFIG_ALIM1535_WDT) += alim1535_wdt.o
61obj-$(CONFIG_ALIM7101_WDT) += alim7101_wdt.o 61obj-$(CONFIG_ALIM7101_WDT) += alim7101_wdt.o
62obj-$(CONFIG_GEODE_WDT) += geodewdt.o
62obj-$(CONFIG_SC520_WDT) += sc520_wdt.o 63obj-$(CONFIG_SC520_WDT) += sc520_wdt.o
63obj-$(CONFIG_EUROTECH_WDT) += eurotechwdt.o 64obj-$(CONFIG_EUROTECH_WDT) += eurotechwdt.o
64obj-$(CONFIG_IB700_WDT) += ib700wdt.o 65obj-$(CONFIG_IB700_WDT) += ib700wdt.o
diff --git a/drivers/watchdog/bfin_wdt.c b/drivers/watchdog/bfin_wdt.c
index 1237113dc14a..03b3e3d91e7c 100644
--- a/drivers/watchdog/bfin_wdt.c
+++ b/drivers/watchdog/bfin_wdt.c
@@ -29,7 +29,8 @@
29 29
30#define stamp(fmt, args...) pr_debug("%s:%i: " fmt "\n", __func__, __LINE__, ## args) 30#define stamp(fmt, args...) pr_debug("%s:%i: " fmt "\n", __func__, __LINE__, ## args)
31#define stampit() stamp("here i am") 31#define stampit() stamp("here i am")
32#define pr_init(fmt, args...) ({ static const __initdata char __fmt[] = fmt; printk(__fmt, ## args); }) 32#define pr_devinit(fmt, args...) ({ static const __devinitconst char __fmt[] = fmt; printk(__fmt, ## args); })
33#define pr_init(fmt, args...) ({ static const __initconst char __fmt[] = fmt; printk(__fmt, ## args); })
33 34
34#define WATCHDOG_NAME "bfin-wdt" 35#define WATCHDOG_NAME "bfin-wdt"
35#define PFX WATCHDOG_NAME ": " 36#define PFX WATCHDOG_NAME ": "
@@ -377,20 +378,6 @@ static int bfin_wdt_resume(struct platform_device *pdev)
377# define bfin_wdt_resume NULL 378# define bfin_wdt_resume NULL
378#endif 379#endif
379 380
380static struct platform_device bfin_wdt_device = {
381 .name = WATCHDOG_NAME,
382 .id = -1,
383};
384
385static struct platform_driver bfin_wdt_driver = {
386 .driver = {
387 .name = WATCHDOG_NAME,
388 .owner = THIS_MODULE,
389 },
390 .suspend = bfin_wdt_suspend,
391 .resume = bfin_wdt_resume,
392};
393
394static const struct file_operations bfin_wdt_fops = { 381static const struct file_operations bfin_wdt_fops = {
395 .owner = THIS_MODULE, 382 .owner = THIS_MODULE,
396 .llseek = no_llseek, 383 .llseek = no_llseek,
@@ -418,11 +405,67 @@ static struct notifier_block bfin_wdt_notifier = {
418}; 405};
419 406
420/** 407/**
421 * bfin_wdt_init - Initialize module 408 * bfin_wdt_probe - Initialize module
422 * 409 *
423 * Registers the device and notifier handler. Actual device 410 * Registers the misc device and notifier handler. Actual device
424 * initialization is handled by bfin_wdt_open(). 411 * initialization is handled by bfin_wdt_open().
425 */ 412 */
413static int __devinit bfin_wdt_probe(struct platform_device *pdev)
414{
415 int ret;
416
417 ret = register_reboot_notifier(&bfin_wdt_notifier);
418 if (ret) {
419 pr_devinit(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n", ret);
420 return ret;
421 }
422
423 ret = misc_register(&bfin_wdt_miscdev);
424 if (ret) {
425 pr_devinit(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
426 WATCHDOG_MINOR, ret);
427 unregister_reboot_notifier(&bfin_wdt_notifier);
428 return ret;
429 }
430
431 pr_devinit(KERN_INFO PFX "initialized: timeout=%d sec (nowayout=%d)\n",
432 timeout, nowayout);
433
434 return 0;
435}
436
437/**
438 * bfin_wdt_remove - Initialize module
439 *
440 * Unregisters the misc device and notifier handler. Actual device
441 * deinitialization is handled by bfin_wdt_close().
442 */
443static int __devexit bfin_wdt_remove(struct platform_device *pdev)
444{
445 misc_deregister(&bfin_wdt_miscdev);
446 unregister_reboot_notifier(&bfin_wdt_notifier);
447 return 0;
448}
449
450static struct platform_device *bfin_wdt_device;
451
452static struct platform_driver bfin_wdt_driver = {
453 .probe = bfin_wdt_probe,
454 .remove = __devexit_p(bfin_wdt_remove),
455 .suspend = bfin_wdt_suspend,
456 .resume = bfin_wdt_resume,
457 .driver = {
458 .name = WATCHDOG_NAME,
459 .owner = THIS_MODULE,
460 },
461};
462
463/**
464 * bfin_wdt_init - Initialize module
465 *
466 * Checks the module params and registers the platform device & driver.
467 * Real work is in the platform probe function.
468 */
426static int __init bfin_wdt_init(void) 469static int __init bfin_wdt_init(void)
427{ 470{
428 int ret; 471 int ret;
@@ -436,44 +479,32 @@ static int __init bfin_wdt_init(void)
436 /* Since this is an on-chip device and needs no board-specific 479 /* Since this is an on-chip device and needs no board-specific
437 * resources, we'll handle all the platform device stuff here. 480 * resources, we'll handle all the platform device stuff here.
438 */ 481 */
439 ret = platform_device_register(&bfin_wdt_device); 482 ret = platform_driver_register(&bfin_wdt_driver);
440 if (ret)
441 return ret;
442
443 ret = platform_driver_probe(&bfin_wdt_driver, NULL);
444 if (ret)
445 return ret;
446
447 ret = register_reboot_notifier(&bfin_wdt_notifier);
448 if (ret) { 483 if (ret) {
449 pr_init(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n", ret); 484 pr_init(KERN_ERR PFX "unable to register driver\n");
450 return ret; 485 return ret;
451 } 486 }
452 487
453 ret = misc_register(&bfin_wdt_miscdev); 488 bfin_wdt_device = platform_device_register_simple(WATCHDOG_NAME, -1, NULL, 0);
454 if (ret) { 489 if (IS_ERR(bfin_wdt_device)) {
455 pr_init(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n", 490 pr_init(KERN_ERR PFX "unable to register device\n");
456 WATCHDOG_MINOR, ret); 491 platform_driver_unregister(&bfin_wdt_driver);
457 unregister_reboot_notifier(&bfin_wdt_notifier); 492 return PTR_ERR(bfin_wdt_device);
458 return ret;
459 } 493 }
460 494
461 pr_init(KERN_INFO PFX "initialized: timeout=%d sec (nowayout=%d)\n",
462 timeout, nowayout);
463
464 return 0; 495 return 0;
465} 496}
466 497
467/** 498/**
468 * bfin_wdt_exit - Deinitialize module 499 * bfin_wdt_exit - Deinitialize module
469 * 500 *
470 * Unregisters the device and notifier handler. Actual device 501 * Back out the platform device & driver steps. Real work is in the
471 * deinitialization is handled by bfin_wdt_close(). 502 * platform remove function.
472 */ 503 */
473static void __exit bfin_wdt_exit(void) 504static void __exit bfin_wdt_exit(void)
474{ 505{
475 misc_deregister(&bfin_wdt_miscdev); 506 platform_device_unregister(bfin_wdt_device);
476 unregister_reboot_notifier(&bfin_wdt_notifier); 507 platform_driver_unregister(&bfin_wdt_driver);
477} 508}
478 509
479module_init(bfin_wdt_init); 510module_init(bfin_wdt_init);
diff --git a/drivers/watchdog/booke_wdt.c b/drivers/watchdog/booke_wdt.c
index d362f5bf658a..c1ba0db48501 100644
--- a/drivers/watchdog/booke_wdt.c
+++ b/drivers/watchdog/booke_wdt.c
@@ -1,12 +1,10 @@
1/* 1/*
2 * drivers/char/watchdog/booke_wdt.c
3 *
4 * Watchdog timer for PowerPC Book-E systems 2 * Watchdog timer for PowerPC Book-E systems
5 * 3 *
6 * Author: Matthew McClintock 4 * Author: Matthew McClintock
7 * Maintainer: Kumar Gala <galak@kernel.crashing.org> 5 * Maintainer: Kumar Gala <galak@kernel.crashing.org>
8 * 6 *
9 * Copyright 2005 Freescale Semiconductor Inc. 7 * Copyright 2005, 2008 Freescale Semiconductor Inc.
10 * 8 *
11 * This program is free software; you can redistribute it and/or modify it 9 * This program is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License as published by the 10 * under the terms of the GNU General Public License as published by the
@@ -16,6 +14,7 @@
16 14
17#include <linux/module.h> 15#include <linux/module.h>
18#include <linux/fs.h> 16#include <linux/fs.h>
17#include <linux/smp.h>
19#include <linux/miscdevice.h> 18#include <linux/miscdevice.h>
20#include <linux/notifier.h> 19#include <linux/notifier.h>
21#include <linux/watchdog.h> 20#include <linux/watchdog.h>
@@ -38,7 +37,7 @@
38#define WDT_PERIOD_DEFAULT 3 /* Refer to the PPC40x and PPC4xx manuals */ 37#define WDT_PERIOD_DEFAULT 3 /* Refer to the PPC40x and PPC4xx manuals */
39#endif /* for timing information */ 38#endif /* for timing information */
40 39
41u32 booke_wdt_enabled = 0; 40u32 booke_wdt_enabled;
42u32 booke_wdt_period = WDT_PERIOD_DEFAULT; 41u32 booke_wdt_period = WDT_PERIOD_DEFAULT;
43 42
44#ifdef CONFIG_FSL_BOOKE 43#ifdef CONFIG_FSL_BOOKE
@@ -47,33 +46,31 @@ u32 booke_wdt_period = WDT_PERIOD_DEFAULT;
47#define WDTP(x) (TCR_WP(x)) 46#define WDTP(x) (TCR_WP(x))
48#endif 47#endif
49 48
50/* 49static DEFINE_SPINLOCK(booke_wdt_lock);
51 * booke_wdt_ping: 50
52 */ 51static void __booke_wdt_ping(void *data)
53static __inline__ void booke_wdt_ping(void)
54{ 52{
55 mtspr(SPRN_TSR, TSR_ENW|TSR_WIS); 53 mtspr(SPRN_TSR, TSR_ENW|TSR_WIS);
56} 54}
57 55
58/* 56static void booke_wdt_ping(void)
59 * booke_wdt_enable: 57{
60 */ 58 on_each_cpu(__booke_wdt_ping, NULL, 0, 0);
61static __inline__ void booke_wdt_enable(void) 59}
60
61static void __booke_wdt_enable(void *data)
62{ 62{
63 u32 val; 63 u32 val;
64 64
65 /* clear status before enabling watchdog */ 65 /* clear status before enabling watchdog */
66 booke_wdt_ping(); 66 __booke_wdt_ping(NULL);
67 val = mfspr(SPRN_TCR); 67 val = mfspr(SPRN_TCR);
68 val |= (TCR_WIE|TCR_WRC(WRC_CHIP)|WDTP(booke_wdt_period)); 68 val |= (TCR_WIE|TCR_WRC(WRC_CHIP)|WDTP(booke_wdt_period));
69 69
70 mtspr(SPRN_TCR, val); 70 mtspr(SPRN_TCR, val);
71} 71}
72 72
73/* 73static ssize_t booke_wdt_write(struct file *file, const char __user *buf,
74 * booke_wdt_write:
75 */
76static ssize_t booke_wdt_write (struct file *file, const char __user *buf,
77 size_t count, loff_t *ppos) 74 size_t count, loff_t *ppos)
78{ 75{
79 booke_wdt_ping(); 76 booke_wdt_ping();
@@ -81,15 +78,11 @@ static ssize_t booke_wdt_write (struct file *file, const char __user *buf,
81} 78}
82 79
83static struct watchdog_info ident = { 80static struct watchdog_info ident = {
84 .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING, 81 .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING,
85 .firmware_version = 0, 82 .identity = "PowerPC Book-E Watchdog",
86 .identity = "PowerPC Book-E Watchdog",
87}; 83};
88 84
89/* 85static int booke_wdt_ioctl(struct inode *inode, struct file *file,
90 * booke_wdt_ioctl:
91 */
92static int booke_wdt_ioctl (struct inode *inode, struct file *file,
93 unsigned int cmd, unsigned long arg) 86 unsigned int cmd, unsigned long arg)
94{ 87{
95 u32 tmp = 0; 88 u32 tmp = 0;
@@ -97,7 +90,7 @@ static int booke_wdt_ioctl (struct inode *inode, struct file *file,
97 90
98 switch (cmd) { 91 switch (cmd) {
99 case WDIOC_GETSUPPORT: 92 case WDIOC_GETSUPPORT:
100 if (copy_to_user ((struct watchdog_info __user *) arg, &ident, 93 if (copy_to_user((struct watchdog_info __user *)arg, &ident,
101 sizeof(struct watchdog_info))) 94 sizeof(struct watchdog_info)))
102 return -EFAULT; 95 return -EFAULT;
103 case WDIOC_GETSTATUS: 96 case WDIOC_GETSTATUS:
@@ -132,33 +125,33 @@ static int booke_wdt_ioctl (struct inode *inode, struct file *file,
132 125
133 return 0; 126 return 0;
134} 127}
135/* 128
136 * booke_wdt_open: 129static int booke_wdt_open(struct inode *inode, struct file *file)
137 */
138static int booke_wdt_open (struct inode *inode, struct file *file)
139{ 130{
131 spin_lock(&booke_wdt_lock);
140 if (booke_wdt_enabled == 0) { 132 if (booke_wdt_enabled == 0) {
141 booke_wdt_enabled = 1; 133 booke_wdt_enabled = 1;
142 booke_wdt_enable(); 134 on_each_cpu(__booke_wdt_enable, NULL, 0, 0);
143 printk (KERN_INFO "PowerPC Book-E Watchdog Timer Enabled (wdt_period=%d)\n", 135 printk(KERN_INFO "PowerPC Book-E Watchdog Timer Enabled "
144 booke_wdt_period); 136 "(wdt_period=%d)\n", booke_wdt_period);
145 } 137 }
138 spin_unlock(&booke_wdt_lock);
146 139
147 return nonseekable_open(inode, file); 140 return nonseekable_open(inode, file);
148} 141}
149 142
150static const struct file_operations booke_wdt_fops = { 143static const struct file_operations booke_wdt_fops = {
151 .owner = THIS_MODULE, 144 .owner = THIS_MODULE,
152 .llseek = no_llseek, 145 .llseek = no_llseek,
153 .write = booke_wdt_write, 146 .write = booke_wdt_write,
154 .ioctl = booke_wdt_ioctl, 147 .ioctl = booke_wdt_ioctl,
155 .open = booke_wdt_open, 148 .open = booke_wdt_open,
156}; 149};
157 150
158static struct miscdevice booke_wdt_miscdev = { 151static struct miscdevice booke_wdt_miscdev = {
159 .minor = WATCHDOG_MINOR, 152 .minor = WATCHDOG_MINOR,
160 .name = "watchdog", 153 .name = "watchdog",
161 .fops = &booke_wdt_fops, 154 .fops = &booke_wdt_fops,
162}; 155};
163 156
164static void __exit booke_wdt_exit(void) 157static void __exit booke_wdt_exit(void)
@@ -166,28 +159,27 @@ static void __exit booke_wdt_exit(void)
166 misc_deregister(&booke_wdt_miscdev); 159 misc_deregister(&booke_wdt_miscdev);
167} 160}
168 161
169/*
170 * booke_wdt_init:
171 */
172static int __init booke_wdt_init(void) 162static int __init booke_wdt_init(void)
173{ 163{
174 int ret = 0; 164 int ret = 0;
175 165
176 printk (KERN_INFO "PowerPC Book-E Watchdog Timer Loaded\n"); 166 printk(KERN_INFO "PowerPC Book-E Watchdog Timer Loaded\n");
177 ident.firmware_version = cur_cpu_spec->pvr_value; 167 ident.firmware_version = cur_cpu_spec->pvr_value;
178 168
179 ret = misc_register(&booke_wdt_miscdev); 169 ret = misc_register(&booke_wdt_miscdev);
180 if (ret) { 170 if (ret) {
181 printk (KERN_CRIT "Cannot register miscdev on minor=%d (err=%d)\n", 171 printk(KERN_CRIT "Cannot register miscdev on minor=%d: %d\n",
182 WATCHDOG_MINOR, ret); 172 WATCHDOG_MINOR, ret);
183 return ret; 173 return ret;
184 } 174 }
185 175
176 spin_lock(&booke_wdt_lock);
186 if (booke_wdt_enabled == 1) { 177 if (booke_wdt_enabled == 1) {
187 printk (KERN_INFO "PowerPC Book-E Watchdog Timer Enabled (wdt_period=%d)\n", 178 printk(KERN_INFO "PowerPC Book-E Watchdog Timer Enabled "
188 booke_wdt_period); 179 "(wdt_period=%d)\n", booke_wdt_period);
189 booke_wdt_enable(); 180 on_each_cpu(__booke_wdt_enable, NULL, 0, 0);
190 } 181 }
182 spin_unlock(&booke_wdt_lock);
191 183
192 return ret; 184 return ret;
193} 185}
diff --git a/drivers/watchdog/geodewdt.c b/drivers/watchdog/geodewdt.c
new file mode 100644
index 000000000000..30d09cbbad94
--- /dev/null
+++ b/drivers/watchdog/geodewdt.c
@@ -0,0 +1,308 @@
1/* Watchdog timer for the Geode GX/LX with the CS5535/CS5536 companion chip
2 *
3 * Copyright (C) 2006-2007, Advanced Micro Devices, Inc.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version
8 * 2 of the License, or (at your option) any later version.
9 */
10
11
12#include <linux/module.h>
13#include <linux/moduleparam.h>
14#include <linux/types.h>
15#include <linux/miscdevice.h>
16#include <linux/watchdog.h>
17#include <linux/fs.h>
18#include <linux/platform_device.h>
19#include <linux/reboot.h>
20
21#include <asm/uaccess.h>
22#include <asm/geode.h>
23
24#define GEODEWDT_HZ 500
25#define GEODEWDT_SCALE 6
26#define GEODEWDT_MAX_SECONDS 131
27
28#define WDT_FLAGS_OPEN 1
29#define WDT_FLAGS_ORPHAN 2
30
31#define DRV_NAME "geodewdt"
32#define WATCHDOG_NAME "Geode GX/LX WDT"
33#define WATCHDOG_TIMEOUT 60
34
35static int timeout = WATCHDOG_TIMEOUT;
36module_param(timeout, int, 0);
37MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. 1<= timeout <=131, default=" __MODULE_STRING(WATCHDOG_TIMEOUT) ".");
38
39static int nowayout = WATCHDOG_NOWAYOUT;
40module_param(nowayout, int, 0);
41MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
42
43static struct platform_device *geodewdt_platform_device;
44static unsigned long wdt_flags;
45static int wdt_timer;
46static int safe_close;
47
48static void geodewdt_ping(void)
49{
50 /* Stop the counter */
51 geode_mfgpt_write(wdt_timer, MFGPT_REG_SETUP, 0);
52
53 /* Reset the counter */
54 geode_mfgpt_write(wdt_timer, MFGPT_REG_COUNTER, 0);
55
56 /* Enable the counter */
57 geode_mfgpt_write(wdt_timer, MFGPT_REG_SETUP, MFGPT_SETUP_CNTEN);
58}
59
60static void geodewdt_disable(void)
61{
62 geode_mfgpt_write(wdt_timer, MFGPT_REG_SETUP, 0);
63 geode_mfgpt_write(wdt_timer, MFGPT_REG_COUNTER, 0);
64}
65
66static int geodewdt_set_heartbeat(int val)
67{
68 if (val < 1 || val > GEODEWDT_MAX_SECONDS)
69 return -EINVAL;
70
71 geode_mfgpt_write(wdt_timer, MFGPT_REG_SETUP, 0);
72 geode_mfgpt_write(wdt_timer, MFGPT_REG_CMP2, val * GEODEWDT_HZ);
73 geode_mfgpt_write(wdt_timer, MFGPT_REG_COUNTER, 0);
74 geode_mfgpt_write(wdt_timer, MFGPT_REG_SETUP, MFGPT_SETUP_CNTEN);
75
76 timeout = val;
77 return 0;
78}
79
80static int
81geodewdt_open(struct inode *inode, struct file *file)
82{
83 if (test_and_set_bit(WDT_FLAGS_OPEN, &wdt_flags))
84 return -EBUSY;
85
86 if (!test_and_clear_bit(WDT_FLAGS_ORPHAN, &wdt_flags))
87 __module_get(THIS_MODULE);
88
89 geodewdt_ping();
90 return nonseekable_open(inode, file);
91}
92
93static int
94geodewdt_release(struct inode *inode, struct file *file)
95{
96 if (safe_close) {
97 geodewdt_disable();
98 module_put(THIS_MODULE);
99 }
100 else {
101 printk(KERN_CRIT "Unexpected close - watchdog is not stopping.\n");
102 geodewdt_ping();
103
104 set_bit(WDT_FLAGS_ORPHAN, &wdt_flags);
105 }
106
107 clear_bit(WDT_FLAGS_OPEN, &wdt_flags);
108 safe_close = 0;
109 return 0;
110}
111
112static ssize_t
113geodewdt_write(struct file *file, const char __user *data, size_t len,
114 loff_t *ppos)
115{
116 if(len) {
117 if (!nowayout) {
118 size_t i;
119 safe_close = 0;
120
121 for (i = 0; i != len; i++) {
122 char c;
123
124 if (get_user(c, data + i))
125 return -EFAULT;
126
127 if (c == 'V')
128 safe_close = 1;
129 }
130 }
131
132 geodewdt_ping();
133 }
134 return len;
135}
136
137static int
138geodewdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
139 unsigned long arg)
140{
141 void __user *argp = (void __user *)arg;
142 int __user *p = argp;
143 int interval;
144
145 static struct watchdog_info ident = {
146 .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING
147 | WDIOF_MAGICCLOSE,
148 .firmware_version = 1,
149 .identity = WATCHDOG_NAME,
150 };
151
152 switch(cmd) {
153 case WDIOC_GETSUPPORT:
154 return copy_to_user(argp, &ident,
155 sizeof(ident)) ? -EFAULT : 0;
156 break;
157
158 case WDIOC_GETSTATUS:
159 case WDIOC_GETBOOTSTATUS:
160 return put_user(0, p);
161
162 case WDIOC_KEEPALIVE:
163 geodewdt_ping();
164 return 0;
165
166 case WDIOC_SETTIMEOUT:
167 if (get_user(interval, p))
168 return -EFAULT;
169
170 if (geodewdt_set_heartbeat(interval))
171 return -EINVAL;
172
173/* Fall through */
174
175 case WDIOC_GETTIMEOUT:
176 return put_user(timeout, p);
177
178 case WDIOC_SETOPTIONS:
179 {
180 int options, ret = -EINVAL;
181
182 if (get_user(options, p))
183 return -EFAULT;
184
185 if (options & WDIOS_DISABLECARD) {
186 geodewdt_disable();
187 ret = 0;
188 }
189
190 if (options & WDIOS_ENABLECARD) {
191 geodewdt_ping();
192 ret = 0;
193 }
194
195 return ret;
196 }
197 default:
198 return -ENOTTY;
199 }
200
201 return 0;
202}
203
204static const struct file_operations geodewdt_fops = {
205 .owner = THIS_MODULE,
206 .llseek = no_llseek,
207 .write = geodewdt_write,
208 .ioctl = geodewdt_ioctl,
209 .open = geodewdt_open,
210 .release = geodewdt_release,
211};
212
213static struct miscdevice geodewdt_miscdev = {
214 .minor = WATCHDOG_MINOR,
215 .name = "watchdog",
216 .fops = &geodewdt_fops
217};
218
219static int __devinit
220geodewdt_probe(struct platform_device *dev)
221{
222 int ret, timer;
223
224 timer = geode_mfgpt_alloc_timer(MFGPT_TIMER_ANY, MFGPT_DOMAIN_WORKING);
225
226 if (timer == -1) {
227 printk(KERN_ERR "geodewdt: No timers were available\n");
228 return -ENODEV;
229 }
230
231 wdt_timer = timer;
232
233 /* Set up the timer */
234
235 geode_mfgpt_write(wdt_timer, MFGPT_REG_SETUP,
236 GEODEWDT_SCALE | (3 << 8));
237
238 /* Set up comparator 2 to reset when the event fires */
239 geode_mfgpt_toggle_event(wdt_timer, MFGPT_CMP2, MFGPT_EVENT_RESET, 1);
240
241 /* Set up the initial timeout */
242
243 geode_mfgpt_write(wdt_timer, MFGPT_REG_CMP2,
244 timeout * GEODEWDT_HZ);
245
246 ret = misc_register(&geodewdt_miscdev);
247
248 return ret;
249}
250
251static int __devexit
252geodewdt_remove(struct platform_device *dev)
253{
254 misc_deregister(&geodewdt_miscdev);
255 return 0;
256}
257
258static void
259geodewdt_shutdown(struct platform_device *dev)
260{
261 geodewdt_disable();
262}
263
264static struct platform_driver geodewdt_driver = {
265 .probe = geodewdt_probe,
266 .remove = __devexit_p(geodewdt_remove),
267 .shutdown = geodewdt_shutdown,
268 .driver = {
269 .owner = THIS_MODULE,
270 .name = DRV_NAME,
271 },
272};
273
274static int __init
275geodewdt_init(void)
276{
277 int ret;
278
279 ret = platform_driver_register(&geodewdt_driver);
280 if (ret)
281 return ret;
282
283 geodewdt_platform_device = platform_device_register_simple(DRV_NAME, -1, NULL, 0);
284 if (IS_ERR(geodewdt_platform_device)) {
285 ret = PTR_ERR(geodewdt_platform_device);
286 goto err;
287 }
288
289 return 0;
290err:
291 platform_driver_unregister(&geodewdt_driver);
292 return ret;
293}
294
295static void __exit
296geodewdt_exit(void)
297{
298 platform_device_unregister(geodewdt_platform_device);
299 platform_driver_unregister(&geodewdt_driver);
300}
301
302module_init(geodewdt_init);
303module_exit(geodewdt_exit);
304
305MODULE_AUTHOR("Advanced Micro Devices, Inc");
306MODULE_DESCRIPTION("Geode GX/LX Watchdog Driver");
307MODULE_LICENSE("GPL");
308MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
diff --git a/drivers/watchdog/hpwdt.c b/drivers/watchdog/hpwdt.c
index 6483d1066b95..eaa3f2a79ff5 100644
--- a/drivers/watchdog/hpwdt.c
+++ b/drivers/watchdog/hpwdt.c
@@ -140,49 +140,53 @@ static struct pci_device_id hpwdt_devices[] = {
140}; 140};
141MODULE_DEVICE_TABLE(pci, hpwdt_devices); 141MODULE_DEVICE_TABLE(pci, hpwdt_devices);
142 142
143extern asmlinkage void asminline_call(struct cmn_registers *pi86Regs, unsigned long *pRomEntry);
144
143#ifndef CONFIG_X86_64 145#ifndef CONFIG_X86_64
144/* --32 Bit Bios------------------------------------------------------------ */ 146/* --32 Bit Bios------------------------------------------------------------ */
145 147
146#define HPWDT_ARCH 32 148#define HPWDT_ARCH 32
147 149
148static void asminline_call(struct cmn_registers *pi86Regs, 150asm(".text \n\t"
149 unsigned long *pRomEntry) 151 ".align 4 \n"
150{ 152 "asminline_call: \n\t"
151 asm("pushl %ebp \n\t" 153 "pushl %ebp \n\t"
152 "movl %esp, %ebp \n\t" 154 "movl %esp, %ebp \n\t"
153 "pusha \n\t" 155 "pusha \n\t"
154 "pushf \n\t" 156 "pushf \n\t"
155 "push %es \n\t" 157 "push %es \n\t"
156 "push %ds \n\t" 158 "push %ds \n\t"
157 "pop %es \n\t" 159 "pop %es \n\t"
158 "movl 8(%ebp),%eax \n\t" 160 "movl 8(%ebp),%eax \n\t"
159 "movl 4(%eax),%ebx \n\t" 161 "movl 4(%eax),%ebx \n\t"
160 "movl 8(%eax),%ecx \n\t" 162 "movl 8(%eax),%ecx \n\t"
161 "movl 12(%eax),%edx \n\t" 163 "movl 12(%eax),%edx \n\t"
162 "movl 16(%eax),%esi \n\t" 164 "movl 16(%eax),%esi \n\t"
163 "movl 20(%eax),%edi \n\t" 165 "movl 20(%eax),%edi \n\t"
164 "movl (%eax),%eax \n\t" 166 "movl (%eax),%eax \n\t"
165 "push %cs \n\t" 167 "push %cs \n\t"
166 "call *12(%ebp) \n\t" 168 "call *12(%ebp) \n\t"
167 "pushf \n\t" 169 "pushf \n\t"
168 "pushl %eax \n\t" 170 "pushl %eax \n\t"
169 "movl 8(%ebp),%eax \n\t" 171 "movl 8(%ebp),%eax \n\t"
170 "movl %ebx,4(%eax) \n\t" 172 "movl %ebx,4(%eax) \n\t"
171 "movl %ecx,8(%eax) \n\t" 173 "movl %ecx,8(%eax) \n\t"
172 "movl %edx,12(%eax) \n\t" 174 "movl %edx,12(%eax) \n\t"
173 "movl %esi,16(%eax) \n\t" 175 "movl %esi,16(%eax) \n\t"
174 "movl %edi,20(%eax) \n\t" 176 "movl %edi,20(%eax) \n\t"
175 "movw %ds,24(%eax) \n\t" 177 "movw %ds,24(%eax) \n\t"
176 "movw %es,26(%eax) \n\t" 178 "movw %es,26(%eax) \n\t"
177 "popl %ebx \n\t" 179 "popl %ebx \n\t"
178 "movl %ebx,(%eax) \n\t" 180 "movl %ebx,(%eax) \n\t"
179 "popl %ebx \n\t" 181 "popl %ebx \n\t"
180 "movl %ebx,28(%eax) \n\t" 182 "movl %ebx,28(%eax) \n\t"
181 "pop %es \n\t" 183 "pop %es \n\t"
182 "popf \n\t" 184 "popf \n\t"
183 "popa \n\t" 185 "popa \n\t"
184 "leave \n\t" "ret"); 186 "leave \n\t"
185} 187 "ret \n\t"
188 ".previous");
189
186 190
187/* 191/*
188 * cru_detect 192 * cru_detect
@@ -333,43 +337,44 @@ static int __devinit detect_cru_service(void)
333 337
334#define HPWDT_ARCH 64 338#define HPWDT_ARCH 64
335 339
336static void asminline_call(struct cmn_registers *pi86Regs, 340asm(".text \n\t"
337 unsigned long *pRomEntry) 341 ".align 4 \n"
338{ 342 "asminline_call: \n\t"
339 asm("pushq %rbp \n\t" 343 "pushq %rbp \n\t"
340 "movq %rsp, %rbp \n\t" 344 "movq %rsp, %rbp \n\t"
341 "pushq %rax \n\t" 345 "pushq %rax \n\t"
342 "pushq %rbx \n\t" 346 "pushq %rbx \n\t"
343 "pushq %rdx \n\t" 347 "pushq %rdx \n\t"
344 "pushq %r12 \n\t" 348 "pushq %r12 \n\t"
345 "pushq %r9 \n\t" 349 "pushq %r9 \n\t"
346 "movq %rsi, %r12 \n\t" 350 "movq %rsi, %r12 \n\t"
347 "movq %rdi, %r9 \n\t" 351 "movq %rdi, %r9 \n\t"
348 "movl 4(%r9),%ebx \n\t" 352 "movl 4(%r9),%ebx \n\t"
349 "movl 8(%r9),%ecx \n\t" 353 "movl 8(%r9),%ecx \n\t"
350 "movl 12(%r9),%edx \n\t" 354 "movl 12(%r9),%edx \n\t"
351 "movl 16(%r9),%esi \n\t" 355 "movl 16(%r9),%esi \n\t"
352 "movl 20(%r9),%edi \n\t" 356 "movl 20(%r9),%edi \n\t"
353 "movl (%r9),%eax \n\t" 357 "movl (%r9),%eax \n\t"
354 "call *%r12 \n\t" 358 "call *%r12 \n\t"
355 "pushfq \n\t" 359 "pushfq \n\t"
356 "popq %r12 \n\t" 360 "popq %r12 \n\t"
357 "popfq \n\t" 361 "popfq \n\t"
358 "movl %eax, (%r9) \n\t" 362 "movl %eax, (%r9) \n\t"
359 "movl %ebx, 4(%r9) \n\t" 363 "movl %ebx, 4(%r9) \n\t"
360 "movl %ecx, 8(%r9) \n\t" 364 "movl %ecx, 8(%r9) \n\t"
361 "movl %edx, 12(%r9) \n\t" 365 "movl %edx, 12(%r9) \n\t"
362 "movl %esi, 16(%r9) \n\t" 366 "movl %esi, 16(%r9) \n\t"
363 "movl %edi, 20(%r9) \n\t" 367 "movl %edi, 20(%r9) \n\t"
364 "movq %r12, %rax \n\t" 368 "movq %r12, %rax \n\t"
365 "movl %eax, 28(%r9) \n\t" 369 "movl %eax, 28(%r9) \n\t"
366 "popq %r9 \n\t" 370 "popq %r9 \n\t"
367 "popq %r12 \n\t" 371 "popq %r12 \n\t"
368 "popq %rdx \n\t" 372 "popq %rdx \n\t"
369 "popq %rbx \n\t" 373 "popq %rbx \n\t"
370 "popq %rax \n\t" 374 "popq %rax \n\t"
371 "leave \n\t" "ret"); 375 "leave \n\t"
372} 376 "ret \n\t"
377 ".previous");
373 378
374/* 379/*
375 * dmi_find_cru 380 * dmi_find_cru
diff --git a/drivers/watchdog/iTCO_wdt.c b/drivers/watchdog/iTCO_wdt.c
index a0e6809e369f..95ba985bd341 100644
--- a/drivers/watchdog/iTCO_wdt.c
+++ b/drivers/watchdog/iTCO_wdt.c
@@ -41,9 +41,10 @@
41 * 82801HH (ICH8DH) : document number 313056-003, 313057-009, 41 * 82801HH (ICH8DH) : document number 313056-003, 313057-009,
42 * 82801HO (ICH8DO) : document number 313056-003, 313057-009, 42 * 82801HO (ICH8DO) : document number 313056-003, 313057-009,
43 * 82801HEM (ICH8M-E) : document number 313056-003, 313057-009, 43 * 82801HEM (ICH8M-E) : document number 313056-003, 313057-009,
44 * 82801IB (ICH9) : document number 316972-001, 316973-001, 44 * 82801IB (ICH9) : document number 316972-001, 316973-006,
45 * 82801IR (ICH9R) : document number 316972-001, 316973-001, 45 * 82801IR (ICH9R) : document number 316972-001, 316973-006,
46 * 82801IH (ICH9DH) : document number 316972-001, 316973-001, 46 * 82801IH (ICH9DH) : document number 316972-001, 316973-006,
47 * 82801IO (ICH9DO) : document number 316972-001, 316973-006,
47 * 6300ESB (6300ESB) : document number 300641-003, 300884-010, 48 * 6300ESB (6300ESB) : document number 300641-003, 300884-010,
48 * 631xESB (631xESB) : document number 313082-001, 313075-005, 49 * 631xESB (631xESB) : document number 313082-001, 313075-005,
49 * 632xESB (632xESB) : document number 313082-001, 313075-005 50 * 632xESB (632xESB) : document number 313082-001, 313075-005
@@ -55,8 +56,8 @@
55 56
56/* Module and version information */ 57/* Module and version information */
57#define DRV_NAME "iTCO_wdt" 58#define DRV_NAME "iTCO_wdt"
58#define DRV_VERSION "1.02" 59#define DRV_VERSION "1.03"
59#define DRV_RELDATE "26-Jul-2007" 60#define DRV_RELDATE "30-Apr-2008"
60#define PFX DRV_NAME ": " 61#define PFX DRV_NAME ": "
61 62
62/* Includes */ 63/* Includes */
@@ -104,6 +105,7 @@ enum iTCO_chipsets {
104 TCO_ICH9, /* ICH9 */ 105 TCO_ICH9, /* ICH9 */
105 TCO_ICH9R, /* ICH9R */ 106 TCO_ICH9R, /* ICH9R */
106 TCO_ICH9DH, /* ICH9DH */ 107 TCO_ICH9DH, /* ICH9DH */
108 TCO_ICH9DO, /* ICH9DO */
107 TCO_631XESB, /* 631xESB/632xESB */ 109 TCO_631XESB, /* 631xESB/632xESB */
108}; 110};
109 111
@@ -136,6 +138,7 @@ static struct {
136 {"ICH9", 2}, 138 {"ICH9", 2},
137 {"ICH9R", 2}, 139 {"ICH9R", 2},
138 {"ICH9DH", 2}, 140 {"ICH9DH", 2},
141 {"ICH9DO", 2},
139 {"631xESB/632xESB", 2}, 142 {"631xESB/632xESB", 2},
140 {NULL,0} 143 {NULL,0}
141}; 144};
@@ -181,6 +184,7 @@ static struct pci_device_id iTCO_wdt_pci_tbl[] = {
181 { ITCO_PCI_DEVICE(0x2918, TCO_ICH9 )}, 184 { ITCO_PCI_DEVICE(0x2918, TCO_ICH9 )},
182 { ITCO_PCI_DEVICE(0x2916, TCO_ICH9R )}, 185 { ITCO_PCI_DEVICE(0x2916, TCO_ICH9R )},
183 { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH9_2, TCO_ICH9DH )}, 186 { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH9_2, TCO_ICH9DH )},
187 { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH9_4, TCO_ICH9DO )},
184 { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ESB2_0, TCO_631XESB)}, 188 { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ESB2_0, TCO_631XESB)},
185 { ITCO_PCI_DEVICE(0x2671, TCO_631XESB)}, 189 { ITCO_PCI_DEVICE(0x2671, TCO_631XESB)},
186 { ITCO_PCI_DEVICE(0x2672, TCO_631XESB)}, 190 { ITCO_PCI_DEVICE(0x2672, TCO_631XESB)},
diff --git a/drivers/watchdog/w83697hf_wdt.c b/drivers/watchdog/w83697hf_wdt.c
index c622a0e6c9ae..528b882420b6 100644
--- a/drivers/watchdog/w83697hf_wdt.c
+++ b/drivers/watchdog/w83697hf_wdt.c
@@ -44,6 +44,7 @@
44#define WATCHDOG_NAME "w83697hf/hg WDT" 44#define WATCHDOG_NAME "w83697hf/hg WDT"
45#define PFX WATCHDOG_NAME ": " 45#define PFX WATCHDOG_NAME ": "
46#define WATCHDOG_TIMEOUT 60 /* 60 sec default timeout */ 46#define WATCHDOG_TIMEOUT 60 /* 60 sec default timeout */
47#define WATCHDOG_EARLY_DISABLE 1 /* Disable until userland kicks in */
47 48
48static unsigned long wdt_is_open; 49static unsigned long wdt_is_open;
49static char expect_close; 50static char expect_close;
@@ -56,12 +57,16 @@ MODULE_PARM_DESC(wdt_io, "w83697hf/hg WDT io port (default 0x2e, 0 = autodetect)
56 57
57static int timeout = WATCHDOG_TIMEOUT; /* in seconds */ 58static int timeout = WATCHDOG_TIMEOUT; /* in seconds */
58module_param(timeout, int, 0); 59module_param(timeout, int, 0);
59MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. 1<= timeout <=255, default=" __MODULE_STRING(WATCHDOG_TIMEOUT) "."); 60MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. 1<= timeout <=255 (default=" __MODULE_STRING(WATCHDOG_TIMEOUT) ")");
60 61
61static int nowayout = WATCHDOG_NOWAYOUT; 62static int nowayout = WATCHDOG_NOWAYOUT;
62module_param(nowayout, int, 0); 63module_param(nowayout, int, 0);
63MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); 64MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
64 65
66static int early_disable = WATCHDOG_EARLY_DISABLE;
67module_param(early_disable, int, 0);
68MODULE_PARM_DESC(early_disable, "Watchdog gets disabled at boot time (default=" __MODULE_STRING(WATCHDOG_EARLY_DISABLE) ")");
69
65/* 70/*
66 * Kernel methods. 71 * Kernel methods.
67 */ 72 */
@@ -140,7 +145,7 @@ w83697hf_init(void)
140 w83697hf_deselect_wdt(); 145 w83697hf_deselect_wdt();
141} 146}
142 147
143static int 148static void
144wdt_ping(void) 149wdt_ping(void)
145{ 150{
146 spin_lock(&io_lock); 151 spin_lock(&io_lock);
@@ -150,10 +155,9 @@ wdt_ping(void)
150 155
151 w83697hf_deselect_wdt(); 156 w83697hf_deselect_wdt();
152 spin_unlock(&io_lock); 157 spin_unlock(&io_lock);
153 return 0;
154} 158}
155 159
156static int 160static void
157wdt_enable(void) 161wdt_enable(void)
158{ 162{
159 spin_lock(&io_lock); 163 spin_lock(&io_lock);
@@ -164,10 +168,9 @@ wdt_enable(void)
164 168
165 w83697hf_deselect_wdt(); 169 w83697hf_deselect_wdt();
166 spin_unlock(&io_lock); 170 spin_unlock(&io_lock);
167 return 0;
168} 171}
169 172
170static int 173static void
171wdt_disable(void) 174wdt_disable(void)
172{ 175{
173 spin_lock(&io_lock); 176 spin_lock(&io_lock);
@@ -178,7 +181,22 @@ wdt_disable(void)
178 181
179 w83697hf_deselect_wdt(); 182 w83697hf_deselect_wdt();
180 spin_unlock(&io_lock); 183 spin_unlock(&io_lock);
181 return 0; 184}
185
186static unsigned char
187wdt_running(void)
188{
189 unsigned char t;
190
191 spin_lock(&io_lock);
192 w83697hf_select_wdt();
193
194 t = w83697hf_get_reg(0xF4); /* Read timer */
195
196 w83697hf_deselect_wdt();
197 spin_unlock(&io_lock);
198
199 return t;
182} 200}
183 201
184static int 202static int
@@ -397,7 +415,11 @@ wdt_init(void)
397 } 415 }
398 416
399 w83697hf_init(); 417 w83697hf_init();
400 wdt_disable(); /* Disable watchdog until first use */ 418 if (early_disable) {
419 if (wdt_running())
420 printk (KERN_WARNING PFX "Stopping previously enabled watchdog until userland kicks in\n");
421 wdt_disable();
422 }
401 423
402 if (wdt_set_heartbeat(timeout)) { 424 if (wdt_set_heartbeat(timeout)) {
403 wdt_set_heartbeat(WATCHDOG_TIMEOUT); 425 wdt_set_heartbeat(WATCHDOG_TIMEOUT);
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-27 22:47:20 -0500