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Diffstat (limited to 'drivers/watchdog/smsc37b787_wdt.c')
-rw-r--r--drivers/watchdog/smsc37b787_wdt.c448
1 files changed, 225 insertions, 223 deletions
diff --git a/drivers/watchdog/smsc37b787_wdt.c b/drivers/watchdog/smsc37b787_wdt.c
index 5d2b5ba61414..988ff1d5b4be 100644
--- a/drivers/watchdog/smsc37b787_wdt.c
+++ b/drivers/watchdog/smsc37b787_wdt.c
@@ -18,7 +18,7 @@
18 * History: 18 * History:
19 * 2003 - Created version 1.0 for Linux 2.4.x. 19 * 2003 - Created version 1.0 for Linux 2.4.x.
20 * 2006 - Ported to Linux 2.6, added nowayout and MAGICCLOSE 20 * 2006 - Ported to Linux 2.6, added nowayout and MAGICCLOSE
21 * features. Released version 1.1 21 * features. Released version 1.1
22 * 22 *
23 * Theory of operation: 23 * Theory of operation:
24 * 24 *
@@ -55,9 +55,9 @@
55#include <linux/reboot.h> 55#include <linux/reboot.h>
56#include <linux/init.h> 56#include <linux/init.h>
57#include <linux/spinlock.h> 57#include <linux/spinlock.h>
58#include <linux/io.h>
59#include <linux/uaccess.h>
58 60
59#include <asm/io.h>
60#include <asm/uaccess.h>
61#include <asm/system.h> 61#include <asm/system.h>
62 62
63/* enable support for minutes as units? */ 63/* enable support for minutes as units? */
@@ -71,15 +71,15 @@
71#define UNIT_MINUTE 1 71#define UNIT_MINUTE 1
72 72
73#define MODNAME "smsc37b787_wdt: " 73#define MODNAME "smsc37b787_wdt: "
74#define VERSION "1.1" 74#define VERSION "1.1"
75 75
76#define IOPORT 0x3F0 76#define IOPORT 0x3F0
77#define IOPORT_SIZE 2 77#define IOPORT_SIZE 2
78#define IODEV_NO 8 78#define IODEV_NO 8
79 79
80static int unit = UNIT_SECOND; /* timer's unit */ 80static int unit = UNIT_SECOND; /* timer's unit */
81static int timeout = 60; /* timeout value: default is 60 "units" */ 81static int timeout = 60; /* timeout value: default is 60 "units" */
82static unsigned long timer_enabled = 0; /* is the timer enabled? */ 82static unsigned long timer_enabled; /* is the timer enabled? */
83 83
84static char expect_close; /* is the close expected? */ 84static char expect_close; /* is the close expected? */
85 85
@@ -93,114 +93,121 @@ static int nowayout = WATCHDOG_NOWAYOUT;
93 93
94static inline void open_io_config(void) 94static inline void open_io_config(void)
95{ 95{
96 outb(0x55, IOPORT); 96 outb(0x55, IOPORT);
97 mdelay(1); 97 mdelay(1);
98 outb(0x55, IOPORT); 98 outb(0x55, IOPORT);
99} 99}
100 100
101/* lock the IO chip */ 101/* lock the IO chip */
102static inline void close_io_config(void) 102static inline void close_io_config(void)
103{ 103{
104 outb(0xAA, IOPORT); 104 outb(0xAA, IOPORT);
105} 105}
106 106
107/* select the IO device */ 107/* select the IO device */
108static inline void select_io_device(unsigned char devno) 108static inline void select_io_device(unsigned char devno)
109{ 109{
110 outb(0x07, IOPORT); 110 outb(0x07, IOPORT);
111 outb(devno, IOPORT+1); 111 outb(devno, IOPORT+1);
112} 112}
113 113
114/* write to the control register */ 114/* write to the control register */
115static inline void write_io_cr(unsigned char reg, unsigned char data) 115static inline void write_io_cr(unsigned char reg, unsigned char data)
116{ 116{
117 outb(reg, IOPORT); 117 outb(reg, IOPORT);
118 outb(data, IOPORT+1); 118 outb(data, IOPORT+1);
119} 119}
120 120
121/* read from the control register */ 121/* read from the control register */
122static inline char read_io_cr(unsigned char reg) 122static inline char read_io_cr(unsigned char reg)
123{ 123{
124 outb(reg, IOPORT); 124 outb(reg, IOPORT);
125 return inb(IOPORT+1); 125 return inb(IOPORT+1);
126} 126}
127 127
128/* -- Medium level functions ------------------------------------*/ 128/* -- Medium level functions ------------------------------------*/
129 129
130static inline void gpio_bit12(unsigned char reg) 130static inline void gpio_bit12(unsigned char reg)
131{ 131{
132 // -- General Purpose I/O Bit 1.2 -- 132 /* -- General Purpose I/O Bit 1.2 --
133 // Bit 0, In/Out: 0 = Output, 1 = Input 133 * Bit 0, In/Out: 0 = Output, 1 = Input
134 // Bit 1, Polarity: 0 = No Invert, 1 = Invert 134 * Bit 1, Polarity: 0 = No Invert, 1 = Invert
135 // Bit 2, Group Enable Intr.: 0 = Disable, 1 = Enable 135 * Bit 2, Group Enable Intr.: 0 = Disable, 1 = Enable
136 // Bit 3/4, Function select: 00 = GPI/O, 01 = WDT, 10 = P17, 136 * Bit 3/4, Function select: 00 = GPI/O, 01 = WDT, 10 = P17,
137 // 11 = Either Edge Triggered Intr. 2 137 * 11 = Either Edge Triggered Intr. 2
138 // Bit 5/6 (Reserved) 138 * Bit 5/6 (Reserved)
139 // Bit 7, Output Type: 0 = Push Pull Bit, 1 = Open Drain 139 * Bit 7, Output Type: 0 = Push Pull Bit, 1 = Open Drain
140 write_io_cr(0xE2, reg); 140 */
141 write_io_cr(0xE2, reg);
141} 142}
142 143
143static inline void gpio_bit13(unsigned char reg) 144static inline void gpio_bit13(unsigned char reg)
144{ 145{
145 // -- General Purpose I/O Bit 1.3 -- 146 /* -- General Purpose I/O Bit 1.3 --
146 // Bit 0, In/Out: 0 = Output, 1 = Input 147 * Bit 0, In/Out: 0 = Output, 1 = Input
147 // Bit 1, Polarity: 0 = No Invert, 1 = Invert 148 * Bit 1, Polarity: 0 = No Invert, 1 = Invert
148 // Bit 2, Group Enable Intr.: 0 = Disable, 1 = Enable 149 * Bit 2, Group Enable Intr.: 0 = Disable, 1 = Enable
149 // Bit 3, Function select: 0 = GPI/O, 1 = LED 150 * Bit 3, Function select: 0 = GPI/O, 1 = LED
150 // Bit 4-6 (Reserved) 151 * Bit 4-6 (Reserved)
151 // Bit 7, Output Type: 0 = Push Pull Bit, 1 = Open Drain 152 * Bit 7, Output Type: 0 = Push Pull Bit, 1 = Open Drain
152 write_io_cr(0xE3, reg); 153 */
154 write_io_cr(0xE3, reg);
153} 155}
154 156
155static inline void wdt_timer_units(unsigned char new_units) 157static inline void wdt_timer_units(unsigned char new_units)
156{ 158{
157 // -- Watchdog timer units -- 159 /* -- Watchdog timer units --
158 // Bit 0-6 (Reserved) 160 * Bit 0-6 (Reserved)
159 // Bit 7, WDT Time-out Value Units Select 161 * Bit 7, WDT Time-out Value Units Select
160 // (0 = Minutes, 1 = Seconds) 162 * (0 = Minutes, 1 = Seconds)
161 write_io_cr(0xF1, new_units); 163 */
164 write_io_cr(0xF1, new_units);
162} 165}
163 166
164static inline void wdt_timeout_value(unsigned char new_timeout) 167static inline void wdt_timeout_value(unsigned char new_timeout)
165{ 168{
166 // -- Watchdog Timer Time-out Value -- 169 /* -- Watchdog Timer Time-out Value --
167 // Bit 0-7 Binary coded units (0=Disabled, 1..255) 170 * Bit 0-7 Binary coded units (0=Disabled, 1..255)
168 write_io_cr(0xF2, new_timeout); 171 */
172 write_io_cr(0xF2, new_timeout);
169} 173}
170 174
171static inline void wdt_timer_conf(unsigned char conf) 175static inline void wdt_timer_conf(unsigned char conf)
172{ 176{
173 // -- Watchdog timer configuration -- 177 /* -- Watchdog timer configuration --
174 // Bit 0 Joystick enable: 0* = No Reset, 1 = Reset WDT upon Gameport I/O 178 * Bit 0 Joystick enable: 0* = No Reset, 1 = Reset WDT upon
175 // Bit 1 Keyboard enable: 0* = No Reset, 1 = Reset WDT upon KBD Intr. 179 * Gameport I/O
176 // Bit 2 Mouse enable: 0* = No Reset, 1 = Reset WDT upon Mouse Intr. 180 * Bit 1 Keyboard enable: 0* = No Reset, 1 = Reset WDT upon KBD Intr.
177 // Bit 3 Reset the timer 181 * Bit 2 Mouse enable: 0* = No Reset, 1 = Reset WDT upon Mouse Intr
178 // (Wrong in SMsC documentation? Given as: PowerLED Timout Enabled) 182 * Bit 3 Reset the timer
179 // Bit 4-7 WDT Interrupt Mapping: (0000* = Disabled, 183 * (Wrong in SMsC documentation? Given as: PowerLED Timout
180 // 0001=IRQ1, 0010=(Invalid), 0011=IRQ3 to 1111=IRQ15) 184 * Enabled)
181 write_io_cr(0xF3, conf); 185 * Bit 4-7 WDT Interrupt Mapping: (0000* = Disabled,
186 * 0001=IRQ1, 0010=(Invalid), 0011=IRQ3 to 1111=IRQ15)
187 */
188 write_io_cr(0xF3, conf);
182} 189}
183 190
184static inline void wdt_timer_ctrl(unsigned char reg) 191static inline void wdt_timer_ctrl(unsigned char reg)
185{ 192{
186 // -- Watchdog timer control -- 193 /* -- Watchdog timer control --
187 // Bit 0 Status Bit: 0 = Timer counting, 1 = Timeout occured 194 * Bit 0 Status Bit: 0 = Timer counting, 1 = Timeout occured
188 // Bit 1 Power LED Toggle: 0 = Disable Toggle, 1 = Toggle at 1 Hz 195 * Bit 1 Power LED Toggle: 0 = Disable Toggle, 1 = Toggle at 1 Hz
189 // Bit 2 Force Timeout: 1 = Forces WD timeout event (self-cleaning) 196 * Bit 2 Force Timeout: 1 = Forces WD timeout event (self-cleaning)
190 // Bit 3 P20 Force Timeout enabled: 197 * Bit 3 P20 Force Timeout enabled:
191 // 0 = P20 activity does not generate the WD timeout event 198 * 0 = P20 activity does not generate the WD timeout event
192 // 1 = P20 Allows rising edge of P20, from the keyboard 199 * 1 = P20 Allows rising edge of P20, from the keyboard
193 // controller, to force the WD timeout event. 200 * controller, to force the WD timeout event.
194 // Bit 4 (Reserved) 201 * Bit 4 (Reserved)
195 // -- Soft power management -- 202 * -- Soft power management --
196 // Bit 5 Stop Counter: 1 = Stop software power down counter 203 * Bit 5 Stop Counter: 1 = Stop software power down counter
197 // set via register 0xB8, (self-cleaning) 204 * set via register 0xB8, (self-cleaning)
198 // (Upon read: 0 = Counter running, 1 = Counter stopped) 205 * (Upon read: 0 = Counter running, 1 = Counter stopped)
199 // Bit 6 Restart Counter: 1 = Restart software power down counter 206 * Bit 6 Restart Counter: 1 = Restart software power down counter
200 // set via register 0xB8, (self-cleaning) 207 * set via register 0xB8, (self-cleaning)
201 // Bit 7 SPOFF: 1 = Force software power down (self-cleaning) 208 * Bit 7 SPOFF: 1 = Force software power down (self-cleaning)
202 209 */
203 write_io_cr(0xF4, reg); 210 write_io_cr(0xF4, reg);
204} 211}
205 212
206/* -- Higher level functions ------------------------------------*/ 213/* -- Higher level functions ------------------------------------*/
@@ -209,33 +216,34 @@ static inline void wdt_timer_ctrl(unsigned char reg)
209 216
210static void wb_smsc_wdt_initialize(void) 217static void wb_smsc_wdt_initialize(void)
211{ 218{
212 unsigned char old; 219 unsigned char old;
213 220
214 spin_lock(&io_lock); 221 spin_lock(&io_lock);
215 open_io_config(); 222 open_io_config();
216 select_io_device(IODEV_NO); 223 select_io_device(IODEV_NO);
217 224
218 // enable the watchdog 225 /* enable the watchdog */
219 gpio_bit13(0x08); // Select pin 80 = LED not GPIO 226 gpio_bit13(0x08); /* Select pin 80 = LED not GPIO */
220 gpio_bit12(0x0A); // Set pin 79 = WDT not GPIO/Output/Polarity=Invert 227 gpio_bit12(0x0A); /* Set pin 79 = WDT not
228 GPIO/Output/Polarity=Invert */
229 /* disable the timeout */
230 wdt_timeout_value(0);
221 231
222 // disable the timeout 232 /* reset control register */
223 wdt_timeout_value(0); 233 wdt_timer_ctrl(0x00);
224 234
225 // reset control register 235 /* reset configuration register */
226 wdt_timer_ctrl(0x00);
227
228 // reset configuration register
229 wdt_timer_conf(0x00); 236 wdt_timer_conf(0x00);
230 237
231 // read old (timer units) register 238 /* read old (timer units) register */
232 old = read_io_cr(0xF1) & 0x7F; 239 old = read_io_cr(0xF1) & 0x7F;
233 if (unit == UNIT_SECOND) old |= 0x80; // set to seconds 240 if (unit == UNIT_SECOND)
241 old |= 0x80; /* set to seconds */
234 242
235 // set the watchdog timer units 243 /* set the watchdog timer units */
236 wdt_timer_units(old); 244 wdt_timer_units(old);
237 245
238 close_io_config(); 246 close_io_config();
239 spin_unlock(&io_lock); 247 spin_unlock(&io_lock);
240} 248}
241 249
@@ -244,23 +252,23 @@ static void wb_smsc_wdt_initialize(void)
244static void wb_smsc_wdt_shutdown(void) 252static void wb_smsc_wdt_shutdown(void)
245{ 253{
246 spin_lock(&io_lock); 254 spin_lock(&io_lock);
247 open_io_config(); 255 open_io_config();
248 select_io_device(IODEV_NO); 256 select_io_device(IODEV_NO);
249 257
250 // disable the watchdog 258 /* disable the watchdog */
251 gpio_bit13(0x09); 259 gpio_bit13(0x09);
252 gpio_bit12(0x09); 260 gpio_bit12(0x09);
253 261
254 // reset watchdog config register 262 /* reset watchdog config register */
255 wdt_timer_conf(0x00); 263 wdt_timer_conf(0x00);
256 264
257 // reset watchdog control register 265 /* reset watchdog control register */
258 wdt_timer_ctrl(0x00); 266 wdt_timer_ctrl(0x00);
259 267
260 // disable timeout 268 /* disable timeout */
261 wdt_timeout_value(0x00); 269 wdt_timeout_value(0x00);
262 270
263 close_io_config(); 271 close_io_config();
264 spin_unlock(&io_lock); 272 spin_unlock(&io_lock);
265} 273}
266 274
@@ -269,16 +277,16 @@ static void wb_smsc_wdt_shutdown(void)
269static void wb_smsc_wdt_set_timeout(unsigned char new_timeout) 277static void wb_smsc_wdt_set_timeout(unsigned char new_timeout)
270{ 278{
271 spin_lock(&io_lock); 279 spin_lock(&io_lock);
272 open_io_config(); 280 open_io_config();
273 select_io_device(IODEV_NO); 281 select_io_device(IODEV_NO);
274 282
275 // set Power LED to blink, if we enable the timeout 283 /* set Power LED to blink, if we enable the timeout */
276 wdt_timer_ctrl((new_timeout == 0) ? 0x00 : 0x02); 284 wdt_timer_ctrl((new_timeout == 0) ? 0x00 : 0x02);
277 285
278 // set timeout value 286 /* set timeout value */
279 wdt_timeout_value(new_timeout); 287 wdt_timeout_value(new_timeout);
280 288
281 close_io_config(); 289 close_io_config();
282 spin_unlock(&io_lock); 290 spin_unlock(&io_lock);
283} 291}
284 292
@@ -286,32 +294,32 @@ static void wb_smsc_wdt_set_timeout(unsigned char new_timeout)
286 294
287static unsigned char wb_smsc_wdt_get_timeout(void) 295static unsigned char wb_smsc_wdt_get_timeout(void)
288{ 296{
289 unsigned char set_timeout; 297 unsigned char set_timeout;
290 298
291 spin_lock(&io_lock); 299 spin_lock(&io_lock);
292 open_io_config(); 300 open_io_config();
293 select_io_device(IODEV_NO); 301 select_io_device(IODEV_NO);
294 set_timeout = read_io_cr(0xF2); 302 set_timeout = read_io_cr(0xF2);
295 close_io_config(); 303 close_io_config();
296 spin_unlock(&io_lock); 304 spin_unlock(&io_lock);
297 305
298 return set_timeout; 306 return set_timeout;
299} 307}
300 308
301/* disable watchdog */ 309/* disable watchdog */
302 310
303static void wb_smsc_wdt_disable(void) 311static void wb_smsc_wdt_disable(void)
304{ 312{
305 // set the timeout to 0 to disable the watchdog 313 /* set the timeout to 0 to disable the watchdog */
306 wb_smsc_wdt_set_timeout(0); 314 wb_smsc_wdt_set_timeout(0);
307} 315}
308 316
309/* enable watchdog by setting the current timeout */ 317/* enable watchdog by setting the current timeout */
310 318
311static void wb_smsc_wdt_enable(void) 319static void wb_smsc_wdt_enable(void)
312{ 320{
313 // set the current timeout... 321 /* set the current timeout... */
314 wb_smsc_wdt_set_timeout(timeout); 322 wb_smsc_wdt_set_timeout(timeout);
315} 323}
316 324
317/* reset the timer */ 325/* reset the timer */
@@ -319,14 +327,14 @@ static void wb_smsc_wdt_enable(void)
319static void wb_smsc_wdt_reset_timer(void) 327static void wb_smsc_wdt_reset_timer(void)
320{ 328{
321 spin_lock(&io_lock); 329 spin_lock(&io_lock);
322 open_io_config(); 330 open_io_config();
323 select_io_device(IODEV_NO); 331 select_io_device(IODEV_NO);
324 332
325 // reset the timer 333 /* reset the timer */
326 wdt_timeout_value(timeout); 334 wdt_timeout_value(timeout);
327 wdt_timer_conf(0x08); 335 wdt_timer_conf(0x08);
328 336
329 close_io_config(); 337 close_io_config();
330 spin_unlock(&io_lock); 338 spin_unlock(&io_lock);
331} 339}
332 340
@@ -355,7 +363,9 @@ static int wb_smsc_wdt_open(struct inode *inode, struct file *file)
355 /* Reload and activate timer */ 363 /* Reload and activate timer */
356 wb_smsc_wdt_enable(); 364 wb_smsc_wdt_enable();
357 365
358 printk(KERN_INFO MODNAME "Watchdog enabled. Timeout set to %d %s.\n", timeout, (unit == UNIT_SECOND) ? "second(s)" : "minute(s)"); 366 printk(KERN_INFO MODNAME
367 "Watchdog enabled. Timeout set to %d %s.\n",
368 timeout, (unit == UNIT_SECOND) ? "second(s)" : "minute(s)");
359 369
360 return nonseekable_open(inode, file); 370 return nonseekable_open(inode, file);
361} 371}
@@ -367,10 +377,12 @@ static int wb_smsc_wdt_release(struct inode *inode, struct file *file)
367 /* Shut off the timer. */ 377 /* Shut off the timer. */
368 378
369 if (expect_close == 42) { 379 if (expect_close == 42) {
370 wb_smsc_wdt_disable(); 380 wb_smsc_wdt_disable();
371 printk(KERN_INFO MODNAME "Watchdog disabled, sleeping again...\n"); 381 printk(KERN_INFO MODNAME
382 "Watchdog disabled, sleeping again...\n");
372 } else { 383 } else {
373 printk(KERN_CRIT MODNAME "Unexpected close, not stopping watchdog!\n"); 384 printk(KERN_CRIT MODNAME
385 "Unexpected close, not stopping watchdog!\n");
374 wb_smsc_wdt_reset_timer(); 386 wb_smsc_wdt_reset_timer();
375 } 387 }
376 388
@@ -392,10 +404,11 @@ static ssize_t wb_smsc_wdt_write(struct file *file, const char __user *data,
392 /* reset expect flag */ 404 /* reset expect flag */
393 expect_close = 0; 405 expect_close = 0;
394 406
395 /* scan to see whether or not we got the magic character */ 407 /* scan to see whether or not we got the
408 magic character */
396 for (i = 0; i != len; i++) { 409 for (i = 0; i != len; i++) {
397 char c; 410 char c;
398 if (get_user(c, data+i)) 411 if (get_user(c, data + i))
399 return -EFAULT; 412 return -EFAULT;
400 if (c == 'V') 413 if (c == 'V')
401 expect_close = 42; 414 expect_close = 42;
@@ -410,8 +423,8 @@ static ssize_t wb_smsc_wdt_write(struct file *file, const char __user *data,
410 423
411/* ioctl => control interface */ 424/* ioctl => control interface */
412 425
413static int wb_smsc_wdt_ioctl(struct inode *inode, struct file *file, 426static long wb_smsc_wdt_ioctl(struct file *file,
414 unsigned int cmd, unsigned long arg) 427 unsigned int cmd, unsigned long arg)
415{ 428{
416 int new_timeout; 429 int new_timeout;
417 430
@@ -420,89 +433,73 @@ static int wb_smsc_wdt_ioctl(struct inode *inode, struct file *file,
420 int __user *i; 433 int __user *i;
421 } uarg; 434 } uarg;
422 435
423 static struct watchdog_info ident = { 436 static const struct watchdog_info ident = {
424 .options = WDIOF_KEEPALIVEPING | 437 .options = WDIOF_KEEPALIVEPING |
425 WDIOF_SETTIMEOUT | 438 WDIOF_SETTIMEOUT |
426 WDIOF_MAGICCLOSE, 439 WDIOF_MAGICCLOSE,
427 .firmware_version = 0, 440 .firmware_version = 0,
428 .identity = "SMsC 37B787 Watchdog" 441 .identity = "SMsC 37B787 Watchdog",
429 }; 442 };
430 443
431 uarg.i = (int __user *)arg; 444 uarg.i = (int __user *)arg;
432 445
433 switch (cmd) { 446 switch (cmd) {
434 default: 447 case WDIOC_GETSUPPORT:
435 return -ENOTTY; 448 return copy_to_user(uarg.ident, &ident, sizeof(ident))
436 449 ? -EFAULT : 0;
437 case WDIOC_GETSUPPORT: 450 case WDIOC_GETSTATUS:
438 return copy_to_user(uarg.ident, &ident, 451 return put_user(wb_smsc_wdt_status(), uarg.i);
439 sizeof(ident)) ? -EFAULT : 0; 452 case WDIOC_GETBOOTSTATUS:
440 453 return put_user(0, uarg.i);
441 case WDIOC_GETSTATUS: 454 case WDIOC_SETOPTIONS:
442 return put_user(wb_smsc_wdt_status(), uarg.i); 455 {
443 456 int options, retval = -EINVAL;
444 case WDIOC_GETBOOTSTATUS:
445 return put_user(0, uarg.i);
446
447 case WDIOC_KEEPALIVE:
448 wb_smsc_wdt_reset_timer();
449 return 0;
450
451 case WDIOC_SETTIMEOUT:
452 if (get_user(new_timeout, uarg.i))
453 return -EFAULT;
454
455 // the API states this is given in secs
456 if (unit == UNIT_MINUTE)
457 new_timeout /= 60;
458
459 if (new_timeout < 0 || new_timeout > MAX_TIMEOUT)
460 return -EINVAL;
461
462 timeout = new_timeout;
463 wb_smsc_wdt_set_timeout(timeout);
464
465 // fall through and return the new timeout...
466
467 case WDIOC_GETTIMEOUT:
468
469 new_timeout = timeout;
470
471 if (unit == UNIT_MINUTE)
472 new_timeout *= 60;
473
474 return put_user(new_timeout, uarg.i);
475
476 case WDIOC_SETOPTIONS:
477 {
478 int options, retval = -EINVAL;
479
480 if (get_user(options, uarg.i))
481 return -EFAULT;
482
483 if (options & WDIOS_DISABLECARD) {
484 wb_smsc_wdt_disable();
485 retval = 0;
486 }
487 457
488 if (options & WDIOS_ENABLECARD) { 458 if (get_user(options, uarg.i))
489 wb_smsc_wdt_enable(); 459 return -EFAULT;
490 retval = 0;
491 }
492 460
493 return retval; 461 if (options & WDIOS_DISABLECARD) {
462 wb_smsc_wdt_disable();
463 retval = 0;
464 }
465 if (options & WDIOS_ENABLECARD) {
466 wb_smsc_wdt_enable();
467 retval = 0;
494 } 468 }
469 return retval;
470 }
471 case WDIOC_KEEPALIVE:
472 wb_smsc_wdt_reset_timer();
473 return 0;
474 case WDIOC_SETTIMEOUT:
475 if (get_user(new_timeout, uarg.i))
476 return -EFAULT;
477 /* the API states this is given in secs */
478 if (unit == UNIT_MINUTE)
479 new_timeout /= 60;
480 if (new_timeout < 0 || new_timeout > MAX_TIMEOUT)
481 return -EINVAL;
482 timeout = new_timeout;
483 wb_smsc_wdt_set_timeout(timeout);
484 /* fall through and return the new timeout... */
485 case WDIOC_GETTIMEOUT:
486 new_timeout = timeout;
487 if (unit == UNIT_MINUTE)
488 new_timeout *= 60;
489 return put_user(new_timeout, uarg.i);
490 default:
491 return -ENOTTY;
495 } 492 }
496} 493}
497 494
498/* -- Notifier funtions -----------------------------------------*/ 495/* -- Notifier funtions -----------------------------------------*/
499 496
500static int wb_smsc_wdt_notify_sys(struct notifier_block *this, unsigned long code, void *unused) 497static int wb_smsc_wdt_notify_sys(struct notifier_block *this,
498 unsigned long code, void *unused)
501{ 499{
502 if (code == SYS_DOWN || code == SYS_HALT) 500 if (code == SYS_DOWN || code == SYS_HALT) {
503 { 501 /* set timeout to 0, to avoid possible race-condition */
504 // set timeout to 0, to avoid possible race-condition 502 timeout = 0;
505 timeout = 0;
506 wb_smsc_wdt_disable(); 503 wb_smsc_wdt_disable();
507 } 504 }
508 return NOTIFY_DONE; 505 return NOTIFY_DONE;
@@ -510,23 +507,20 @@ static int wb_smsc_wdt_notify_sys(struct notifier_block *this, unsigned long cod
510 507
511/* -- Module's structures ---------------------------------------*/ 508/* -- Module's structures ---------------------------------------*/
512 509
513static const struct file_operations wb_smsc_wdt_fops = 510static const struct file_operations wb_smsc_wdt_fops = {
514{ 511 .owner = THIS_MODULE,
515 .owner = THIS_MODULE,
516 .llseek = no_llseek, 512 .llseek = no_llseek,
517 .write = wb_smsc_wdt_write, 513 .write = wb_smsc_wdt_write,
518 .ioctl = wb_smsc_wdt_ioctl, 514 .unlocked_ioctl = wb_smsc_wdt_ioctl,
519 .open = wb_smsc_wdt_open, 515 .open = wb_smsc_wdt_open,
520 .release = wb_smsc_wdt_release, 516 .release = wb_smsc_wdt_release,
521}; 517};
522 518
523static struct notifier_block wb_smsc_wdt_notifier = 519static struct notifier_block wb_smsc_wdt_notifier = {
524{
525 .notifier_call = wb_smsc_wdt_notify_sys, 520 .notifier_call = wb_smsc_wdt_notify_sys,
526}; 521};
527 522
528static struct miscdevice wb_smsc_wdt_miscdev = 523static struct miscdevice wb_smsc_wdt_miscdev = {
529{
530 .minor = WATCHDOG_MINOR, 524 .minor = WATCHDOG_MINOR,
531 .name = "watchdog", 525 .name = "watchdog",
532 .fops = &wb_smsc_wdt_fops, 526 .fops = &wb_smsc_wdt_fops,
@@ -540,39 +534,44 @@ static int __init wb_smsc_wdt_init(void)
540{ 534{
541 int ret; 535 int ret;
542 536
543 printk("SMsC 37B787 watchdog component driver " VERSION " initialising...\n"); 537 printk(KERN_INFO "SMsC 37B787 watchdog component driver "
538 VERSION " initialising...\n");
544 539
545 if (!request_region(IOPORT, IOPORT_SIZE, "SMsC 37B787 watchdog")) { 540 if (!request_region(IOPORT, IOPORT_SIZE, "SMsC 37B787 watchdog")) {
546 printk(KERN_ERR MODNAME "Unable to register IO port %#x\n", IOPORT); 541 printk(KERN_ERR MODNAME "Unable to register IO port %#x\n",
542 IOPORT);
547 ret = -EBUSY; 543 ret = -EBUSY;
548 goto out_pnp; 544 goto out_pnp;
549 } 545 }
550 546
551 // set new maximum, if it's too big 547 /* set new maximum, if it's too big */
552 if (timeout > MAX_TIMEOUT) 548 if (timeout > MAX_TIMEOUT)
553 timeout = MAX_TIMEOUT; 549 timeout = MAX_TIMEOUT;
554 550
555 // init the watchdog timer 551 /* init the watchdog timer */
556 wb_smsc_wdt_initialize(); 552 wb_smsc_wdt_initialize();
557 553
558 ret = register_reboot_notifier(&wb_smsc_wdt_notifier); 554 ret = register_reboot_notifier(&wb_smsc_wdt_notifier);
559 if (ret) { 555 if (ret) {
560 printk(KERN_ERR MODNAME "Unable to register reboot notifier err = %d\n", ret); 556 printk(KERN_ERR MODNAME
557 "Unable to register reboot notifier err = %d\n", ret);
561 goto out_io; 558 goto out_io;
562 } 559 }
563 560
564 ret = misc_register(&wb_smsc_wdt_miscdev); 561 ret = misc_register(&wb_smsc_wdt_miscdev);
565 if (ret) { 562 if (ret) {
566 printk(KERN_ERR MODNAME "Unable to register miscdev on minor %d\n", WATCHDOG_MINOR); 563 printk(KERN_ERR MODNAME
564 "Unable to register miscdev on minor %d\n",
565 WATCHDOG_MINOR);
567 goto out_rbt; 566 goto out_rbt;
568 } 567 }
569 568
570 // output info 569 /* output info */
571 printk(KERN_INFO MODNAME "Timeout set to %d %s.\n", timeout, (unit == UNIT_SECOND) ? "second(s)" : "minute(s)"); 570 printk(KERN_INFO MODNAME "Timeout set to %d %s.\n",
572 printk(KERN_INFO MODNAME "Watchdog initialized and sleeping (nowayout=%d)...\n", nowayout); 571 timeout, (unit == UNIT_SECOND) ? "second(s)" : "minute(s)");
573 572 printk(KERN_INFO MODNAME
574 // ret = 0 573 "Watchdog initialized and sleeping (nowayout=%d)...\n",
575 574 nowayout);
576out_clean: 575out_clean:
577 return ret; 576 return ret;
578 577
@@ -591,8 +590,7 @@ out_pnp:
591static void __exit wb_smsc_wdt_exit(void) 590static void __exit wb_smsc_wdt_exit(void)
592{ 591{
593 /* Stop the timer before we leave */ 592 /* Stop the timer before we leave */
594 if (!nowayout) 593 if (!nowayout) {
595 {
596 wb_smsc_wdt_shutdown(); 594 wb_smsc_wdt_shutdown();
597 printk(KERN_INFO MODNAME "Watchdog disabled.\n"); 595 printk(KERN_INFO MODNAME "Watchdog disabled.\n");
598 } 596 }
@@ -601,25 +599,29 @@ static void __exit wb_smsc_wdt_exit(void)
601 unregister_reboot_notifier(&wb_smsc_wdt_notifier); 599 unregister_reboot_notifier(&wb_smsc_wdt_notifier);
602 release_region(IOPORT, IOPORT_SIZE); 600 release_region(IOPORT, IOPORT_SIZE);
603 601
604 printk("SMsC 37B787 watchdog component driver removed.\n"); 602 printk(KERN_INFO "SMsC 37B787 watchdog component driver removed.\n");
605} 603}
606 604
607module_init(wb_smsc_wdt_init); 605module_init(wb_smsc_wdt_init);
608module_exit(wb_smsc_wdt_exit); 606module_exit(wb_smsc_wdt_exit);
609 607
610MODULE_AUTHOR("Sven Anders <anders@anduras.de>"); 608MODULE_AUTHOR("Sven Anders <anders@anduras.de>");
611MODULE_DESCRIPTION("Driver for SMsC 37B787 watchdog component (Version " VERSION ")"); 609MODULE_DESCRIPTION("Driver for SMsC 37B787 watchdog component (Version "
610 VERSION ")");
612MODULE_LICENSE("GPL"); 611MODULE_LICENSE("GPL");
613 612
614MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR); 613MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
615 614
616#ifdef SMSC_SUPPORT_MINUTES 615#ifdef SMSC_SUPPORT_MINUTES
617module_param(unit, int, 0); 616module_param(unit, int, 0);
618MODULE_PARM_DESC(unit, "set unit to use, 0=seconds or 1=minutes, default is 0"); 617MODULE_PARM_DESC(unit,
618 "set unit to use, 0=seconds or 1=minutes, default is 0");
619#endif 619#endif
620 620
621module_param(timeout, int, 0); 621module_param(timeout, int, 0);
622MODULE_PARM_DESC(timeout, "range is 1-255 units, default is 60"); 622MODULE_PARM_DESC(timeout, "range is 1-255 units, default is 60");
623 623
624module_param(nowayout, int, 0); 624module_param(nowayout, int, 0);
625MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); 625MODULE_PARM_DESC(nowayout,
626 "Watchdog cannot be stopped once started (default="
627 __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
generated by cgit v1.2.2 (git 2.25.0) at 2024-09-21 05:42:21 -0400