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authorAlan Cox <alan@redhat.com>2008-05-19 09:09:57 -0400
committerWim Van Sebroeck <wim@iguana.be>2008-06-21 16:07:12 -0400
commitf2b79c6ede54cf07355ac8d8f3044d682cd0c5ca (patch)
tree5a234662d2bdd2fc520bd7b797d7c623ddc007e3 /drivers/watchdog/wdt977.c
parentd0e58eed05f9baf77c4f75e794ae245f6dae240a (diff)
[WATCHDOG 56/57] wdt977: clean up, coding style and switch to unlocked_ioctl
Review and switch to unlocked_ioctl Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Diffstat (limited to 'drivers/watchdog/wdt977.c')
-rw-r--r--drivers/watchdog/wdt977.c148
1 files changed, 74 insertions, 74 deletions
diff --git a/drivers/watchdog/wdt977.c b/drivers/watchdog/wdt977.c
index fb4b876c9fda..bdc28e522f03 100644
--- a/drivers/watchdog/wdt977.c
+++ b/drivers/watchdog/wdt977.c
@@ -19,7 +19,8 @@
19 * 07-Jul-2003 Daniele Bellucci: Audit return code of misc_register in 19 * 07-Jul-2003 Daniele Bellucci: Audit return code of misc_register in
20 * nwwatchdog_init. 20 * nwwatchdog_init.
21 * 25-Oct-2005 Woody Suwalski: Convert addresses to #defs, add spinlocks 21 * 25-Oct-2005 Woody Suwalski: Convert addresses to #defs, add spinlocks
22 * remove limitiation to be used on Netwinders only 22 * remove limitiation to be used on
23 * Netwinders only
23 */ 24 */
24 25
25#include <linux/module.h> 26#include <linux/module.h>
@@ -33,11 +34,11 @@
33#include <linux/watchdog.h> 34#include <linux/watchdog.h>
34#include <linux/notifier.h> 35#include <linux/notifier.h>
35#include <linux/reboot.h> 36#include <linux/reboot.h>
37#include <linux/io.h>
38#include <linux/uaccess.h>
36 39
37#include <asm/io.h>
38#include <asm/system.h> 40#include <asm/system.h>
39#include <asm/mach-types.h> 41#include <asm/mach-types.h>
40#include <asm/uaccess.h>
41 42
42#define WATCHDOG_VERSION "0.04" 43#define WATCHDOG_VERSION "0.04"
43#define WATCHDOG_NAME "Wdt977" 44#define WATCHDOG_NAME "Wdt977"
@@ -45,7 +46,7 @@
45#define DRIVER_VERSION WATCHDOG_NAME " driver, v" WATCHDOG_VERSION "\n" 46#define DRIVER_VERSION WATCHDOG_NAME " driver, v" WATCHDOG_VERSION "\n"
46 47
47#define IO_INDEX_PORT 0x370 /* on some systems it can be 0x3F0 */ 48#define IO_INDEX_PORT 0x370 /* on some systems it can be 0x3F0 */
48#define IO_DATA_PORT (IO_INDEX_PORT+1) 49#define IO_DATA_PORT (IO_INDEX_PORT + 1)
49 50
50#define UNLOCK_DATA 0x87 51#define UNLOCK_DATA 0x87
51#define LOCK_DATA 0xAA 52#define LOCK_DATA 0xAA
@@ -62,13 +63,16 @@ static char expect_close;
62static DEFINE_SPINLOCK(spinlock); 63static DEFINE_SPINLOCK(spinlock);
63 64
64module_param(timeout, int, 0); 65module_param(timeout, int, 0);
65MODULE_PARM_DESC(timeout,"Watchdog timeout in seconds (60..15300), default=" __MODULE_STRING(DEFAULT_TIMEOUT) ")"); 66MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds (60..15300), default="
67 __MODULE_STRING(DEFAULT_TIMEOUT) ")");
66module_param(testmode, int, 0); 68module_param(testmode, int, 0);
67MODULE_PARM_DESC(testmode,"Watchdog testmode (1 = no reboot), default=0"); 69MODULE_PARM_DESC(testmode, "Watchdog testmode (1 = no reboot), default=0");
68 70
69static int nowayout = WATCHDOG_NOWAYOUT; 71static int nowayout = WATCHDOG_NOWAYOUT;
70module_param(nowayout, int, 0); 72module_param(nowayout, int, 0);
71MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); 73MODULE_PARM_DESC(nowayout,
74 "Watchdog cannot be stopped once started (default="
75 __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
72 76
73/* 77/*
74 * Start the watchdog 78 * Start the watchdog
@@ -95,14 +99,16 @@ static int wdt977_start(void)
95 outb_p(0xF2, IO_INDEX_PORT); 99 outb_p(0xF2, IO_INDEX_PORT);
96 outb_p(timeoutM, IO_DATA_PORT); 100 outb_p(timeoutM, IO_DATA_PORT);
97 outb_p(0xF3, IO_INDEX_PORT); 101 outb_p(0xF3, IO_INDEX_PORT);
98 outb_p(0x00, IO_DATA_PORT); /* another setting is 0E for kbd/mouse/LED */ 102 outb_p(0x00, IO_DATA_PORT); /* another setting is 0E for
103 kbd/mouse/LED */
99 outb_p(0xF4, IO_INDEX_PORT); 104 outb_p(0xF4, IO_INDEX_PORT);
100 outb_p(0x00, IO_DATA_PORT); 105 outb_p(0x00, IO_DATA_PORT);
101 106
102 /* at last select device Aux1 (dev=7) and set GP16 as a watchdog output */ 107 /* At last select device Aux1 (dev=7) and set GP16 as a
103 /* in test mode watch the bit 1 on F4 to indicate "triggered" */ 108 * watchdog output. In test mode watch the bit 1 on F4 to
104 if (!testmode) 109 * indicate "triggered"
105 { 110 */
111 if (!testmode) {
106 outb_p(DEVICE_REGISTER, IO_INDEX_PORT); 112 outb_p(DEVICE_REGISTER, IO_INDEX_PORT);
107 outb_p(0x07, IO_DATA_PORT); 113 outb_p(0x07, IO_DATA_PORT);
108 outb_p(0xE6, IO_INDEX_PORT); 114 outb_p(0xE6, IO_INDEX_PORT);
@@ -147,7 +153,8 @@ static int wdt977_stop(void)
147 outb_p(0xF2, IO_INDEX_PORT); 153 outb_p(0xF2, IO_INDEX_PORT);
148 outb_p(0x00, IO_DATA_PORT); 154 outb_p(0x00, IO_DATA_PORT);
149 155
150 /* at last select device Aux1 (dev=7) and set GP16 as a watchdog output */ 156 /* at last select device Aux1 (dev=7) and set
157 GP16 as a watchdog output */
151 outb_p(DEVICE_REGISTER, IO_INDEX_PORT); 158 outb_p(DEVICE_REGISTER, IO_INDEX_PORT);
152 outb_p(0x07, IO_DATA_PORT); 159 outb_p(0x07, IO_DATA_PORT);
153 outb_p(0xE6, IO_INDEX_PORT); 160 outb_p(0xE6, IO_INDEX_PORT);
@@ -202,16 +209,18 @@ static int wdt977_set_timeout(int t)
202 tmrval = (t + 59) / 60; 209 tmrval = (t + 59) / 60;
203 210
204 if (machine_is_netwinder()) { 211 if (machine_is_netwinder()) {
205 /* we have a hw bug somewhere, so each 977 minute is actually only 30sec 212 /* we have a hw bug somewhere, so each 977 minute is actually
206 * this limits the max timeout to half of device max of 255 minutes... 213 * only 30sec. This limits the max timeout to half of device
214 * max of 255 minutes...
207 */ 215 */
208 tmrval += tmrval; 216 tmrval += tmrval;
209 } 217 }
210 218
211 if ((tmrval < 1) || (tmrval > 255)) 219 if (tmrval < 1 || tmrval > 255)
212 return -EINVAL; 220 return -EINVAL;
213 221
214 /* timeout is the timeout in seconds, timeoutM is the timeout in minutes) */ 222 /* timeout is the timeout in seconds, timeoutM is
223 the timeout in minutes) */
215 timeout = t; 224 timeout = t;
216 timeoutM = tmrval; 225 timeoutM = tmrval;
217 return 0; 226 return 0;
@@ -243,7 +252,7 @@ static int wdt977_get_status(int *status)
243 252
244 spin_unlock_irqrestore(&spinlock, flags); 253 spin_unlock_irqrestore(&spinlock, flags);
245 254
246 *status=0; 255 *status = 0;
247 if (new_status & 1) 256 if (new_status & 1)
248 *status |= WDIOF_CARDRESET; 257 *status |= WDIOF_CARDRESET;
249 258
@@ -258,7 +267,7 @@ static int wdt977_get_status(int *status)
258static int wdt977_open(struct inode *inode, struct file *file) 267static int wdt977_open(struct inode *inode, struct file *file)
259{ 268{
260 /* If the watchdog is alive we don't need to start it again */ 269 /* If the watchdog is alive we don't need to start it again */
261 if( test_and_set_bit(0,&timer_alive) ) 270 if (test_and_set_bit(0, &timer_alive))
262 return -EBUSY; 271 return -EBUSY;
263 272
264 if (nowayout) 273 if (nowayout)
@@ -274,13 +283,13 @@ static int wdt977_release(struct inode *inode, struct file *file)
274 * Shut off the timer. 283 * Shut off the timer.
275 * Lock it in if it's a module and we set nowayout 284 * Lock it in if it's a module and we set nowayout
276 */ 285 */
277 if (expect_close == 42) 286 if (expect_close == 42) {
278 {
279 wdt977_stop(); 287 wdt977_stop();
280 clear_bit(0,&timer_alive); 288 clear_bit(0, &timer_alive);
281 } else { 289 } else {
282 wdt977_keepalive(); 290 wdt977_keepalive();
283 printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n"); 291 printk(KERN_CRIT PFX
292 "Unexpected close, not stopping watchdog!\n");
284 } 293 }
285 expect_close = 0; 294 expect_close = 0;
286 return 0; 295 return 0;
@@ -301,17 +310,14 @@ static int wdt977_release(struct inode *inode, struct file *file)
301static ssize_t wdt977_write(struct file *file, const char __user *buf, 310static ssize_t wdt977_write(struct file *file, const char __user *buf,
302 size_t count, loff_t *ppos) 311 size_t count, loff_t *ppos)
303{ 312{
304 if (count) 313 if (count) {
305 { 314 if (!nowayout) {
306 if (!nowayout)
307 {
308 size_t i; 315 size_t i;
309 316
310 /* In case it was set long ago */ 317 /* In case it was set long ago */
311 expect_close = 0; 318 expect_close = 0;
312 319
313 for (i = 0; i != count; i++) 320 for (i = 0; i != count; i++) {
314 {
315 char c; 321 char c;
316 if (get_user(c, buf + i)) 322 if (get_user(c, buf + i))
317 return -EFAULT; 323 return -EFAULT;
@@ -326,6 +332,14 @@ static ssize_t wdt977_write(struct file *file, const char __user *buf,
326 return count; 332 return count;
327} 333}
328 334
335static const struct watchdog_info ident = {
336 .options = WDIOF_SETTIMEOUT |
337 WDIOF_MAGICCLOSE |
338 WDIOF_KEEPALIVEPING,
339 .firmware_version = 1,
340 .identity = WATCHDOG_NAME,
341};
342
329/* 343/*
330 * wdt977_ioctl: 344 * wdt977_ioctl:
331 * @inode: inode of the device 345 * @inode: inode of the device
@@ -337,16 +351,8 @@ static ssize_t wdt977_write(struct file *file, const char __user *buf,
337 * according to their available features. 351 * according to their available features.
338 */ 352 */
339 353
340static struct watchdog_info ident = { 354static long wdt977_ioctl(struct file *file, unsigned int cmd,
341 .options = WDIOF_SETTIMEOUT | 355 unsigned long arg)
342 WDIOF_MAGICCLOSE |
343 WDIOF_KEEPALIVEPING,
344 .firmware_version = 1,
345 .identity = WATCHDOG_NAME,
346};
347
348static int wdt977_ioctl(struct inode *inode, struct file *file,
349 unsigned int cmd, unsigned long arg)
350{ 356{
351 int status; 357 int status;
352 int new_options, retval = -EINVAL; 358 int new_options, retval = -EINVAL;
@@ -358,8 +364,7 @@ static int wdt977_ioctl(struct inode *inode, struct file *file,
358 364
359 uarg.i = (int __user *)arg; 365 uarg.i = (int __user *)arg;
360 366
361 switch(cmd) 367 switch (cmd) {
362 {
363 default: 368 default:
364 return -ENOTTY; 369 return -ENOTTY;
365 370
@@ -379,7 +384,7 @@ static int wdt977_ioctl(struct inode *inode, struct file *file,
379 return 0; 384 return 0;
380 385
381 case WDIOC_SETOPTIONS: 386 case WDIOC_SETOPTIONS:
382 if (get_user (new_options, uarg.i)) 387 if (get_user(new_options, uarg.i))
383 return -EFAULT; 388 return -EFAULT;
384 389
385 if (new_options & WDIOS_DISABLECARD) { 390 if (new_options & WDIOS_DISABLECARD) {
@@ -413,23 +418,21 @@ static int wdt977_ioctl(struct inode *inode, struct file *file,
413static int wdt977_notify_sys(struct notifier_block *this, unsigned long code, 418static int wdt977_notify_sys(struct notifier_block *this, unsigned long code,
414 void *unused) 419 void *unused)
415{ 420{
416 if(code==SYS_DOWN || code==SYS_HALT) 421 if (code == SYS_DOWN || code == SYS_HALT)
417 wdt977_stop(); 422 wdt977_stop();
418 return NOTIFY_DONE; 423 return NOTIFY_DONE;
419} 424}
420 425
421static const struct file_operations wdt977_fops= 426static const struct file_operations wdt977_fops = {
422{
423 .owner = THIS_MODULE, 427 .owner = THIS_MODULE,
424 .llseek = no_llseek, 428 .llseek = no_llseek,
425 .write = wdt977_write, 429 .write = wdt977_write,
426 .ioctl = wdt977_ioctl, 430 .unlocked_ioctl = wdt977_ioctl,
427 .open = wdt977_open, 431 .open = wdt977_open,
428 .release = wdt977_release, 432 .release = wdt977_release,
429}; 433};
430 434
431static struct miscdevice wdt977_miscdev= 435static struct miscdevice wdt977_miscdev = {
432{
433 .minor = WATCHDOG_MINOR, 436 .minor = WATCHDOG_MINOR,
434 .name = "watchdog", 437 .name = "watchdog",
435 .fops = &wdt977_fops, 438 .fops = &wdt977_fops,
@@ -443,51 +446,48 @@ static int __init wd977_init(void)
443{ 446{
444 int rc; 447 int rc;
445 448
446 //if (!machine_is_netwinder())
447 // return -ENODEV;
448
449 printk(KERN_INFO PFX DRIVER_VERSION); 449 printk(KERN_INFO PFX DRIVER_VERSION);
450 450
451 /* Check that the timeout value is within it's range ; if not reset to the default */ 451 /* Check that the timeout value is within its range;
452 if (wdt977_set_timeout(timeout)) 452 if not reset to the default */
453 { 453 if (wdt977_set_timeout(timeout)) {
454 wdt977_set_timeout(DEFAULT_TIMEOUT); 454 wdt977_set_timeout(DEFAULT_TIMEOUT);
455 printk(KERN_INFO PFX "timeout value must be 60<timeout<15300, using %d\n", 455 printk(KERN_INFO PFX
456 DEFAULT_TIMEOUT); 456 "timeout value must be 60 < timeout < 15300, using %d\n",
457 DEFAULT_TIMEOUT);
457 } 458 }
458 459
459 /* on Netwinder the IOports are already reserved by 460 /* on Netwinder the IOports are already reserved by
460 * arch/arm/mach-footbridge/netwinder-hw.c 461 * arch/arm/mach-footbridge/netwinder-hw.c
461 */ 462 */
462 if (!machine_is_netwinder()) 463 if (!machine_is_netwinder()) {
463 { 464 if (!request_region(IO_INDEX_PORT, 2, WATCHDOG_NAME)) {
464 if (!request_region(IO_INDEX_PORT, 2, WATCHDOG_NAME)) 465 printk(KERN_ERR PFX
465 { 466 "I/O address 0x%04x already in use\n",
466 printk(KERN_ERR PFX "I/O address 0x%04x already in use\n", 467 IO_INDEX_PORT);
467 IO_INDEX_PORT);
468 rc = -EIO; 468 rc = -EIO;
469 goto err_out; 469 goto err_out;
470 } 470 }
471 } 471 }
472 472
473 rc = register_reboot_notifier(&wdt977_notifier); 473 rc = register_reboot_notifier(&wdt977_notifier);
474 if (rc) 474 if (rc) {
475 { 475 printk(KERN_ERR PFX
476 printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n", 476 "cannot register reboot notifier (err=%d)\n", rc);
477 rc);
478 goto err_out_region; 477 goto err_out_region;
479 } 478 }
480 479
481 rc = misc_register(&wdt977_miscdev); 480 rc = misc_register(&wdt977_miscdev);
482 if (rc) 481 if (rc) {
483 { 482 printk(KERN_ERR PFX
484 printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n", 483 "cannot register miscdev on minor=%d (err=%d)\n",
485 wdt977_miscdev.minor, rc); 484 wdt977_miscdev.minor, rc);
486 goto err_out_reboot; 485 goto err_out_reboot;
487 } 486 }
488 487
489 printk(KERN_INFO PFX "initialized. timeout=%d sec (nowayout=%d, testmode=%i)\n", 488 printk(KERN_INFO PFX
490 timeout, nowayout, testmode); 489 "initialized. timeout=%d sec (nowayout=%d, testmode=%i)\n",
490 timeout, nowayout, testmode);
491 491
492 return 0; 492 return 0;
493 493
@@ -495,7 +495,7 @@ err_out_reboot:
495 unregister_reboot_notifier(&wdt977_notifier); 495 unregister_reboot_notifier(&wdt977_notifier);
496err_out_region: 496err_out_region:
497 if (!machine_is_netwinder()) 497 if (!machine_is_netwinder())
498 release_region(IO_INDEX_PORT,2); 498 release_region(IO_INDEX_PORT, 2);
499err_out: 499err_out:
500 return rc; 500 return rc;
501} 501}
@@ -505,7 +505,7 @@ static void __exit wd977_exit(void)
505 wdt977_stop(); 505 wdt977_stop();
506 misc_deregister(&wdt977_miscdev); 506 misc_deregister(&wdt977_miscdev);
507 unregister_reboot_notifier(&wdt977_notifier); 507 unregister_reboot_notifier(&wdt977_notifier);
508 release_region(IO_INDEX_PORT,2); 508 release_region(IO_INDEX_PORT, 2);
509} 509}
510 510
511module_init(wd977_init); 511module_init(wd977_init);