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path: root/drivers/acpi/sleep/proc.c
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Diffstat (limited to 'drivers/acpi/sleep/proc.c')
-rw-r--r--drivers/acpi/sleep/proc.c509
1 files changed, 509 insertions, 0 deletions
diff --git a/drivers/acpi/sleep/proc.c b/drivers/acpi/sleep/proc.c
new file mode 100644
index 000000000000..fd7c5a0649af
--- /dev/null
+++ b/drivers/acpi/sleep/proc.c
@@ -0,0 +1,509 @@
1#include <linux/proc_fs.h>
2#include <linux/seq_file.h>
3#include <linux/suspend.h>
4#include <linux/bcd.h>
5#include <asm/uaccess.h>
6
7#include <acpi/acpi_bus.h>
8#include <acpi/acpi_drivers.h>
9
10#ifdef CONFIG_X86
11#include <linux/mc146818rtc.h>
12#endif
13
14#include "sleep.h"
15
16#define ACPI_SYSTEM_FILE_SLEEP "sleep"
17#define ACPI_SYSTEM_FILE_ALARM "alarm"
18#define ACPI_SYSTEM_FILE_WAKEUP_DEVICE "wakeup"
19
20#define _COMPONENT ACPI_SYSTEM_COMPONENT
21ACPI_MODULE_NAME ("sleep")
22
23
24static int acpi_system_sleep_seq_show(struct seq_file *seq, void *offset)
25{
26 int i;
27
28 ACPI_FUNCTION_TRACE("acpi_system_sleep_seq_show");
29
30 for (i = 0; i <= ACPI_STATE_S5; i++) {
31 if (sleep_states[i]) {
32 seq_printf(seq,"S%d ", i);
33 if (i == ACPI_STATE_S4 && acpi_gbl_FACS->S4bios_f)
34 seq_printf(seq, "S4bios ");
35 }
36 }
37
38 seq_puts(seq, "\n");
39
40 return 0;
41}
42
43static int acpi_system_sleep_open_fs(struct inode *inode, struct file *file)
44{
45 return single_open(file, acpi_system_sleep_seq_show, PDE(inode)->data);
46}
47
48static ssize_t
49acpi_system_write_sleep (
50 struct file *file,
51 const char __user *buffer,
52 size_t count,
53 loff_t *ppos)
54{
55 char str[12];
56 u32 state = 0;
57 int error = 0;
58
59 if (count > sizeof(str) - 1)
60 goto Done;
61 memset(str,0,sizeof(str));
62 if (copy_from_user(str, buffer, count))
63 return -EFAULT;
64
65 /* Check for S4 bios request */
66 if (!strcmp(str,"4b")) {
67 error = acpi_suspend(4);
68 goto Done;
69 }
70 state = simple_strtoul(str, NULL, 0);
71#ifdef CONFIG_SOFTWARE_SUSPEND
72 if (state == 4) {
73 error = software_suspend();
74 goto Done;
75 }
76#endif
77 error = acpi_suspend(state);
78 Done:
79 return error ? error : count;
80}
81
82static int acpi_system_alarm_seq_show(struct seq_file *seq, void *offset)
83{
84 u32 sec, min, hr;
85 u32 day, mo, yr;
86 unsigned char rtc_control = 0;
87 unsigned long flags;
88
89 ACPI_FUNCTION_TRACE("acpi_system_alarm_seq_show");
90
91 spin_lock_irqsave(&rtc_lock, flags);
92
93 sec = CMOS_READ(RTC_SECONDS_ALARM);
94 min = CMOS_READ(RTC_MINUTES_ALARM);
95 hr = CMOS_READ(RTC_HOURS_ALARM);
96 rtc_control = CMOS_READ(RTC_CONTROL);
97
98 /* If we ever get an FACP with proper values... */
99 if (acpi_gbl_FADT->day_alrm)
100 /* ACPI spec: only low 6 its should be cared */
101 day = CMOS_READ(acpi_gbl_FADT->day_alrm) & 0x3F;
102 else
103 day = CMOS_READ(RTC_DAY_OF_MONTH);
104 if (acpi_gbl_FADT->mon_alrm)
105 mo = CMOS_READ(acpi_gbl_FADT->mon_alrm);
106 else
107 mo = CMOS_READ(RTC_MONTH);
108 if (acpi_gbl_FADT->century)
109 yr = CMOS_READ(acpi_gbl_FADT->century) * 100 + CMOS_READ(RTC_YEAR);
110 else
111 yr = CMOS_READ(RTC_YEAR);
112
113 spin_unlock_irqrestore(&rtc_lock, flags);
114
115 if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
116 BCD_TO_BIN(sec);
117 BCD_TO_BIN(min);
118 BCD_TO_BIN(hr);
119 BCD_TO_BIN(day);
120 BCD_TO_BIN(mo);
121 BCD_TO_BIN(yr);
122 }
123
124 /* we're trusting the FADT (see above)*/
125 if (!acpi_gbl_FADT->century)
126 /* If we're not trusting the FADT, we should at least make it
127 * right for _this_ century... ehm, what is _this_ century?
128 *
129 * TBD:
130 * ASAP: find piece of code in the kernel, e.g. star tracker driver,
131 * which we can trust to determine the century correctly. Atom
132 * watch driver would be nice, too...
133 *
134 * if that has not happened, change for first release in 2050:
135 * if (yr<50)
136 * yr += 2100;
137 * else
138 * yr += 2000; // current line of code
139 *
140 * if that has not happened either, please do on 2099/12/31:23:59:59
141 * s/2000/2100
142 *
143 */
144 yr += 2000;
145
146 seq_printf(seq,"%4.4u-", yr);
147 (mo > 12) ? seq_puts(seq, "**-") : seq_printf(seq, "%2.2u-", mo);
148 (day > 31) ? seq_puts(seq, "** ") : seq_printf(seq, "%2.2u ", day);
149 (hr > 23) ? seq_puts(seq, "**:") : seq_printf(seq, "%2.2u:", hr);
150 (min > 59) ? seq_puts(seq, "**:") : seq_printf(seq, "%2.2u:", min);
151 (sec > 59) ? seq_puts(seq, "**\n") : seq_printf(seq, "%2.2u\n", sec);
152
153 return 0;
154}
155
156static int acpi_system_alarm_open_fs(struct inode *inode, struct file *file)
157{
158 return single_open(file, acpi_system_alarm_seq_show, PDE(inode)->data);
159}
160
161
162static int
163get_date_field (
164 char **p,
165 u32 *value)
166{
167 char *next = NULL;
168 char *string_end = NULL;
169 int result = -EINVAL;
170
171 /*
172 * Try to find delimeter, only to insert null. The end of the
173 * string won't have one, but is still valid.
174 */
175 next = strpbrk(*p, "- :");
176 if (next)
177 *next++ = '\0';
178
179 *value = simple_strtoul(*p, &string_end, 10);
180
181 /* Signal success if we got a good digit */
182 if (string_end != *p)
183 result = 0;
184
185 if (next)
186 *p = next;
187
188 return result;
189}
190
191
192static ssize_t
193acpi_system_write_alarm (
194 struct file *file,
195 const char __user *buffer,
196 size_t count,
197 loff_t *ppos)
198{
199 int result = 0;
200 char alarm_string[30] = {'\0'};
201 char *p = alarm_string;
202 u32 sec, min, hr, day, mo, yr;
203 int adjust = 0;
204 unsigned char rtc_control = 0;
205
206 ACPI_FUNCTION_TRACE("acpi_system_write_alarm");
207
208 if (count > sizeof(alarm_string) - 1)
209 return_VALUE(-EINVAL);
210
211 if (copy_from_user(alarm_string, buffer, count))
212 return_VALUE(-EFAULT);
213
214 alarm_string[count] = '\0';
215
216 /* check for time adjustment */
217 if (alarm_string[0] == '+') {
218 p++;
219 adjust = 1;
220 }
221
222 if ((result = get_date_field(&p, &yr)))
223 goto end;
224 if ((result = get_date_field(&p, &mo)))
225 goto end;
226 if ((result = get_date_field(&p, &day)))
227 goto end;
228 if ((result = get_date_field(&p, &hr)))
229 goto end;
230 if ((result = get_date_field(&p, &min)))
231 goto end;
232 if ((result = get_date_field(&p, &sec)))
233 goto end;
234
235 if (sec > 59) {
236 min += 1;
237 sec -= 60;
238 }
239 if (min > 59) {
240 hr += 1;
241 min -= 60;
242 }
243 if (hr > 23) {
244 day += 1;
245 hr -= 24;
246 }
247 if (day > 31) {
248 mo += 1;
249 day -= 31;
250 }
251 if (mo > 12) {
252 yr += 1;
253 mo -= 12;
254 }
255
256 spin_lock_irq(&rtc_lock);
257
258 rtc_control = CMOS_READ(RTC_CONTROL);
259 if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
260 BIN_TO_BCD(yr);
261 BIN_TO_BCD(mo);
262 BIN_TO_BCD(day);
263 BIN_TO_BCD(hr);
264 BIN_TO_BCD(min);
265 BIN_TO_BCD(sec);
266 }
267
268 if (adjust) {
269 yr += CMOS_READ(RTC_YEAR);
270 mo += CMOS_READ(RTC_MONTH);
271 day += CMOS_READ(RTC_DAY_OF_MONTH);
272 hr += CMOS_READ(RTC_HOURS);
273 min += CMOS_READ(RTC_MINUTES);
274 sec += CMOS_READ(RTC_SECONDS);
275 }
276
277 spin_unlock_irq(&rtc_lock);
278
279 if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
280 BCD_TO_BIN(yr);
281 BCD_TO_BIN(mo);
282 BCD_TO_BIN(day);
283 BCD_TO_BIN(hr);
284 BCD_TO_BIN(min);
285 BCD_TO_BIN(sec);
286 }
287
288 if (sec > 59) {
289 min++;
290 sec -= 60;
291 }
292 if (min > 59) {
293 hr++;
294 min -= 60;
295 }
296 if (hr > 23) {
297 day++;
298 hr -= 24;
299 }
300 if (day > 31) {
301 mo++;
302 day -= 31;
303 }
304 if (mo > 12) {
305 yr++;
306 mo -= 12;
307 }
308 if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
309 BIN_TO_BCD(yr);
310 BIN_TO_BCD(mo);
311 BIN_TO_BCD(day);
312 BIN_TO_BCD(hr);
313 BIN_TO_BCD(min);
314 BIN_TO_BCD(sec);
315 }
316
317 spin_lock_irq(&rtc_lock);
318 /*
319 * Disable alarm interrupt before setting alarm timer or else
320 * when ACPI_EVENT_RTC is enabled, a spurious ACPI interrupt occurs
321 */
322 rtc_control &= ~RTC_AIE;
323 CMOS_WRITE(rtc_control, RTC_CONTROL);
324 CMOS_READ(RTC_INTR_FLAGS);
325
326 /* write the fields the rtc knows about */
327 CMOS_WRITE(hr, RTC_HOURS_ALARM);
328 CMOS_WRITE(min, RTC_MINUTES_ALARM);
329 CMOS_WRITE(sec, RTC_SECONDS_ALARM);
330
331 /*
332 * If the system supports an enhanced alarm it will have non-zero
333 * offsets into the CMOS RAM here -- which for some reason are pointing
334 * to the RTC area of memory.
335 */
336 if (acpi_gbl_FADT->day_alrm)
337 CMOS_WRITE(day, acpi_gbl_FADT->day_alrm);
338 if (acpi_gbl_FADT->mon_alrm)
339 CMOS_WRITE(mo, acpi_gbl_FADT->mon_alrm);
340 if (acpi_gbl_FADT->century)
341 CMOS_WRITE(yr/100, acpi_gbl_FADT->century);
342 /* enable the rtc alarm interrupt */
343 rtc_control |= RTC_AIE;
344 CMOS_WRITE(rtc_control, RTC_CONTROL);
345 CMOS_READ(RTC_INTR_FLAGS);
346
347 spin_unlock_irq(&rtc_lock);
348
349 acpi_clear_event(ACPI_EVENT_RTC);
350 acpi_enable_event(ACPI_EVENT_RTC, 0);
351
352 *ppos += count;
353
354 result = 0;
355end:
356 return_VALUE(result ? result : count);
357}
358
359extern struct list_head acpi_wakeup_device_list;
360extern spinlock_t acpi_device_lock;
361
362static int
363acpi_system_wakeup_device_seq_show(struct seq_file *seq, void *offset)
364{
365 struct list_head * node, * next;
366
367 seq_printf(seq, "Device Sleep state Status\n");
368
369 spin_lock(&acpi_device_lock);
370 list_for_each_safe(node, next, &acpi_wakeup_device_list) {
371 struct acpi_device * dev = container_of(node, struct acpi_device, wakeup_list);
372
373 if (!dev->wakeup.flags.valid)
374 continue;
375 spin_unlock(&acpi_device_lock);
376 if (dev->wakeup.flags.run_wake)
377 seq_printf(seq, "%4s %4d %8s\n",
378 dev->pnp.bus_id, (u32) dev->wakeup.sleep_state,
379 dev->wakeup.state.enabled ? "*enabled" : "*disabled");
380 else
381 seq_printf(seq, "%4s %4d %8s\n",
382 dev->pnp.bus_id, (u32) dev->wakeup.sleep_state,
383 dev->wakeup.state.enabled ? "enabled" : "disabled");
384 spin_lock(&acpi_device_lock);
385 }
386 spin_unlock(&acpi_device_lock);
387 return 0;
388}
389
390static ssize_t
391acpi_system_write_wakeup_device (
392 struct file *file,
393 const char __user *buffer,
394 size_t count,
395 loff_t *ppos)
396{
397 struct list_head * node, * next;
398 char strbuf[5];
399 char str[5] = "";
400 int len = count;
401 struct acpi_device *found_dev = NULL;
402
403 if (len > 4) len = 4;
404
405 if (copy_from_user(strbuf, buffer, len))
406 return -EFAULT;
407 strbuf[len] = '\0';
408 sscanf(strbuf, "%s", str);
409
410 spin_lock(&acpi_device_lock);
411 list_for_each_safe(node, next, &acpi_wakeup_device_list) {
412 struct acpi_device * dev = container_of(node, struct acpi_device, wakeup_list);
413 if (!dev->wakeup.flags.valid)
414 continue;
415
416 if (!strncmp(dev->pnp.bus_id, str, 4)) {
417 dev->wakeup.state.enabled = dev->wakeup.state.enabled ? 0:1;
418 found_dev = dev;
419 break;
420 }
421 }
422 if (found_dev) {
423 list_for_each_safe(node, next, &acpi_wakeup_device_list) {
424 struct acpi_device * dev = container_of(node,
425 struct acpi_device, wakeup_list);
426
427 if ((dev != found_dev) &&
428 (dev->wakeup.gpe_number == found_dev->wakeup.gpe_number) &&
429 (dev->wakeup.gpe_device == found_dev->wakeup.gpe_device)) {
430 printk(KERN_WARNING "ACPI: '%s' and '%s' have the same GPE, "
431 "can't disable/enable one seperately\n",
432 dev->pnp.bus_id, found_dev->pnp.bus_id);
433 dev->wakeup.state.enabled = found_dev->wakeup.state.enabled;
434 }
435 }
436 }
437 spin_unlock(&acpi_device_lock);
438 return count;
439}
440
441static int
442acpi_system_wakeup_device_open_fs(struct inode *inode, struct file *file)
443{
444 return single_open(file, acpi_system_wakeup_device_seq_show, PDE(inode)->data);
445}
446
447static struct file_operations acpi_system_wakeup_device_fops = {
448 .open = acpi_system_wakeup_device_open_fs,
449 .read = seq_read,
450 .write = acpi_system_write_wakeup_device,
451 .llseek = seq_lseek,
452 .release = single_release,
453};
454
455static struct file_operations acpi_system_sleep_fops = {
456 .open = acpi_system_sleep_open_fs,
457 .read = seq_read,
458 .write = acpi_system_write_sleep,
459 .llseek = seq_lseek,
460 .release = single_release,
461};
462
463static struct file_operations acpi_system_alarm_fops = {
464 .open = acpi_system_alarm_open_fs,
465 .read = seq_read,
466 .write = acpi_system_write_alarm,
467 .llseek = seq_lseek,
468 .release = single_release,
469};
470
471
472static u32 rtc_handler(void * context)
473{
474 acpi_clear_event(ACPI_EVENT_RTC);
475 acpi_disable_event(ACPI_EVENT_RTC, 0);
476
477 return ACPI_INTERRUPT_HANDLED;
478}
479
480static int acpi_sleep_proc_init(void)
481{
482 struct proc_dir_entry *entry = NULL;
483
484 if (acpi_disabled)
485 return 0;
486
487 /* 'sleep' [R/W]*/
488 entry = create_proc_entry(ACPI_SYSTEM_FILE_SLEEP,
489 S_IFREG|S_IRUGO|S_IWUSR, acpi_root_dir);
490 if (entry)
491 entry->proc_fops = &acpi_system_sleep_fops;
492
493 /* 'alarm' [R/W] */
494 entry = create_proc_entry(ACPI_SYSTEM_FILE_ALARM,
495 S_IFREG|S_IRUGO|S_IWUSR, acpi_root_dir);
496 if (entry)
497 entry->proc_fops = &acpi_system_alarm_fops;
498
499 /* 'wakeup device' [R/W]*/
500 entry = create_proc_entry(ACPI_SYSTEM_FILE_WAKEUP_DEVICE,
501 S_IFREG|S_IRUGO|S_IWUSR, acpi_root_dir);
502 if (entry)
503 entry->proc_fops = &acpi_system_wakeup_device_fops;
504
505 acpi_install_fixed_event_handler(ACPI_EVENT_RTC, rtc_handler, NULL);
506 return 0;
507}
508
509late_initcall(acpi_sleep_proc_init);
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-22 16:35:10 -0500