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1da177e4 LT |
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 | ||
ebb6e1a6 | 16 | #ifdef CONFIG_ACPI_SLEEP_PROC_SLEEP |
1da177e4 | 17 | #define ACPI_SYSTEM_FILE_SLEEP "sleep" |
ebb6e1a6 LB |
18 | #endif |
19 | ||
1da177e4 LT |
20 | #define ACPI_SYSTEM_FILE_ALARM "alarm" |
21 | #define ACPI_SYSTEM_FILE_WAKEUP_DEVICE "wakeup" | |
22 | ||
23 | #define _COMPONENT ACPI_SYSTEM_COMPONENT | |
24 | ACPI_MODULE_NAME ("sleep") | |
25 | ||
ebb6e1a6 | 26 | #ifdef CONFIG_ACPI_SLEEP_PROC_SLEEP |
1da177e4 LT |
27 | |
28 | static int acpi_system_sleep_seq_show(struct seq_file *seq, void *offset) | |
29 | { | |
30 | int i; | |
31 | ||
32 | ACPI_FUNCTION_TRACE("acpi_system_sleep_seq_show"); | |
33 | ||
34 | for (i = 0; i <= ACPI_STATE_S5; i++) { | |
35 | if (sleep_states[i]) { | |
36 | seq_printf(seq,"S%d ", i); | |
37 | if (i == ACPI_STATE_S4 && acpi_gbl_FACS->S4bios_f) | |
38 | seq_printf(seq, "S4bios "); | |
39 | } | |
40 | } | |
41 | ||
42 | seq_puts(seq, "\n"); | |
43 | ||
44 | return 0; | |
45 | } | |
46 | ||
47 | static int acpi_system_sleep_open_fs(struct inode *inode, struct file *file) | |
48 | { | |
49 | return single_open(file, acpi_system_sleep_seq_show, PDE(inode)->data); | |
50 | } | |
51 | ||
52 | static ssize_t | |
53 | acpi_system_write_sleep ( | |
54 | struct file *file, | |
55 | const char __user *buffer, | |
56 | size_t count, | |
57 | loff_t *ppos) | |
58 | { | |
59 | char str[12]; | |
60 | u32 state = 0; | |
61 | int error = 0; | |
62 | ||
63 | if (count > sizeof(str) - 1) | |
64 | goto Done; | |
65 | memset(str,0,sizeof(str)); | |
66 | if (copy_from_user(str, buffer, count)) | |
67 | return -EFAULT; | |
68 | ||
69 | /* Check for S4 bios request */ | |
70 | if (!strcmp(str,"4b")) { | |
71 | error = acpi_suspend(4); | |
72 | goto Done; | |
73 | } | |
74 | state = simple_strtoul(str, NULL, 0); | |
75 | #ifdef CONFIG_SOFTWARE_SUSPEND | |
76 | if (state == 4) { | |
77 | error = software_suspend(); | |
78 | goto Done; | |
79 | } | |
80 | #endif | |
81 | error = acpi_suspend(state); | |
82 | Done: | |
83 | return error ? error : count; | |
84 | } | |
ebb6e1a6 | 85 | #endif /* CONFIG_ACPI_SLEEP_PROC_SLEEP */ |
1da177e4 LT |
86 | |
87 | static int acpi_system_alarm_seq_show(struct seq_file *seq, void *offset) | |
88 | { | |
89 | u32 sec, min, hr; | |
90 | u32 day, mo, yr; | |
91 | unsigned char rtc_control = 0; | |
92 | unsigned long flags; | |
93 | ||
94 | ACPI_FUNCTION_TRACE("acpi_system_alarm_seq_show"); | |
95 | ||
96 | spin_lock_irqsave(&rtc_lock, flags); | |
97 | ||
98 | sec = CMOS_READ(RTC_SECONDS_ALARM); | |
99 | min = CMOS_READ(RTC_MINUTES_ALARM); | |
100 | hr = CMOS_READ(RTC_HOURS_ALARM); | |
101 | rtc_control = CMOS_READ(RTC_CONTROL); | |
102 | ||
103 | /* If we ever get an FACP with proper values... */ | |
104 | if (acpi_gbl_FADT->day_alrm) | |
105 | /* ACPI spec: only low 6 its should be cared */ | |
106 | day = CMOS_READ(acpi_gbl_FADT->day_alrm) & 0x3F; | |
107 | else | |
108 | day = CMOS_READ(RTC_DAY_OF_MONTH); | |
109 | if (acpi_gbl_FADT->mon_alrm) | |
110 | mo = CMOS_READ(acpi_gbl_FADT->mon_alrm); | |
111 | else | |
112 | mo = CMOS_READ(RTC_MONTH); | |
113 | if (acpi_gbl_FADT->century) | |
114 | yr = CMOS_READ(acpi_gbl_FADT->century) * 100 + CMOS_READ(RTC_YEAR); | |
115 | else | |
116 | yr = CMOS_READ(RTC_YEAR); | |
117 | ||
118 | spin_unlock_irqrestore(&rtc_lock, flags); | |
119 | ||
120 | if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) { | |
121 | BCD_TO_BIN(sec); | |
122 | BCD_TO_BIN(min); | |
123 | BCD_TO_BIN(hr); | |
124 | BCD_TO_BIN(day); | |
125 | BCD_TO_BIN(mo); | |
126 | BCD_TO_BIN(yr); | |
127 | } | |
128 | ||
129 | /* we're trusting the FADT (see above)*/ | |
130 | if (!acpi_gbl_FADT->century) | |
131 | /* If we're not trusting the FADT, we should at least make it | |
132 | * right for _this_ century... ehm, what is _this_ century? | |
133 | * | |
134 | * TBD: | |
135 | * ASAP: find piece of code in the kernel, e.g. star tracker driver, | |
136 | * which we can trust to determine the century correctly. Atom | |
137 | * watch driver would be nice, too... | |
138 | * | |
139 | * if that has not happened, change for first release in 2050: | |
140 | * if (yr<50) | |
141 | * yr += 2100; | |
142 | * else | |
143 | * yr += 2000; // current line of code | |
144 | * | |
145 | * if that has not happened either, please do on 2099/12/31:23:59:59 | |
146 | * s/2000/2100 | |
147 | * | |
148 | */ | |
149 | yr += 2000; | |
150 | ||
151 | seq_printf(seq,"%4.4u-", yr); | |
152 | (mo > 12) ? seq_puts(seq, "**-") : seq_printf(seq, "%2.2u-", mo); | |
153 | (day > 31) ? seq_puts(seq, "** ") : seq_printf(seq, "%2.2u ", day); | |
154 | (hr > 23) ? seq_puts(seq, "**:") : seq_printf(seq, "%2.2u:", hr); | |
155 | (min > 59) ? seq_puts(seq, "**:") : seq_printf(seq, "%2.2u:", min); | |
156 | (sec > 59) ? seq_puts(seq, "**\n") : seq_printf(seq, "%2.2u\n", sec); | |
157 | ||
158 | return 0; | |
159 | } | |
160 | ||
161 | static int acpi_system_alarm_open_fs(struct inode *inode, struct file *file) | |
162 | { | |
163 | return single_open(file, acpi_system_alarm_seq_show, PDE(inode)->data); | |
164 | } | |
165 | ||
166 | ||
167 | static int | |
168 | get_date_field ( | |
169 | char **p, | |
170 | u32 *value) | |
171 | { | |
172 | char *next = NULL; | |
173 | char *string_end = NULL; | |
174 | int result = -EINVAL; | |
175 | ||
176 | /* | |
177 | * Try to find delimeter, only to insert null. The end of the | |
178 | * string won't have one, but is still valid. | |
179 | */ | |
180 | next = strpbrk(*p, "- :"); | |
181 | if (next) | |
182 | *next++ = '\0'; | |
183 | ||
184 | *value = simple_strtoul(*p, &string_end, 10); | |
185 | ||
186 | /* Signal success if we got a good digit */ | |
187 | if (string_end != *p) | |
188 | result = 0; | |
189 | ||
190 | if (next) | |
191 | *p = next; | |
192 | ||
193 | return result; | |
194 | } | |
195 | ||
196 | ||
197 | static ssize_t | |
198 | acpi_system_write_alarm ( | |
199 | struct file *file, | |
200 | const char __user *buffer, | |
201 | size_t count, | |
202 | loff_t *ppos) | |
203 | { | |
204 | int result = 0; | |
205 | char alarm_string[30] = {'\0'}; | |
206 | char *p = alarm_string; | |
207 | u32 sec, min, hr, day, mo, yr; | |
208 | int adjust = 0; | |
209 | unsigned char rtc_control = 0; | |
210 | ||
211 | ACPI_FUNCTION_TRACE("acpi_system_write_alarm"); | |
212 | ||
213 | if (count > sizeof(alarm_string) - 1) | |
214 | return_VALUE(-EINVAL); | |
215 | ||
216 | if (copy_from_user(alarm_string, buffer, count)) | |
217 | return_VALUE(-EFAULT); | |
218 | ||
219 | alarm_string[count] = '\0'; | |
220 | ||
221 | /* check for time adjustment */ | |
222 | if (alarm_string[0] == '+') { | |
223 | p++; | |
224 | adjust = 1; | |
225 | } | |
226 | ||
227 | if ((result = get_date_field(&p, &yr))) | |
228 | goto end; | |
229 | if ((result = get_date_field(&p, &mo))) | |
230 | goto end; | |
231 | if ((result = get_date_field(&p, &day))) | |
232 | goto end; | |
233 | if ((result = get_date_field(&p, &hr))) | |
234 | goto end; | |
235 | if ((result = get_date_field(&p, &min))) | |
236 | goto end; | |
237 | if ((result = get_date_field(&p, &sec))) | |
238 | goto end; | |
239 | ||
240 | if (sec > 59) { | |
241 | min += 1; | |
242 | sec -= 60; | |
243 | } | |
244 | if (min > 59) { | |
245 | hr += 1; | |
246 | min -= 60; | |
247 | } | |
248 | if (hr > 23) { | |
249 | day += 1; | |
250 | hr -= 24; | |
251 | } | |
252 | if (day > 31) { | |
253 | mo += 1; | |
254 | day -= 31; | |
255 | } | |
256 | if (mo > 12) { | |
257 | yr += 1; | |
258 | mo -= 12; | |
259 | } | |
260 | ||
261 | spin_lock_irq(&rtc_lock); | |
262 | ||
263 | rtc_control = CMOS_READ(RTC_CONTROL); | |
264 | if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) { | |
265 | BIN_TO_BCD(yr); | |
266 | BIN_TO_BCD(mo); | |
267 | BIN_TO_BCD(day); | |
268 | BIN_TO_BCD(hr); | |
269 | BIN_TO_BCD(min); | |
270 | BIN_TO_BCD(sec); | |
271 | } | |
272 | ||
273 | if (adjust) { | |
274 | yr += CMOS_READ(RTC_YEAR); | |
275 | mo += CMOS_READ(RTC_MONTH); | |
276 | day += CMOS_READ(RTC_DAY_OF_MONTH); | |
277 | hr += CMOS_READ(RTC_HOURS); | |
278 | min += CMOS_READ(RTC_MINUTES); | |
279 | sec += CMOS_READ(RTC_SECONDS); | |
280 | } | |
281 | ||
282 | spin_unlock_irq(&rtc_lock); | |
283 | ||
284 | if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) { | |
285 | BCD_TO_BIN(yr); | |
286 | BCD_TO_BIN(mo); | |
287 | BCD_TO_BIN(day); | |
288 | BCD_TO_BIN(hr); | |
289 | BCD_TO_BIN(min); | |
290 | BCD_TO_BIN(sec); | |
291 | } | |
292 | ||
293 | if (sec > 59) { | |
294 | min++; | |
295 | sec -= 60; | |
296 | } | |
297 | if (min > 59) { | |
298 | hr++; | |
299 | min -= 60; | |
300 | } | |
301 | if (hr > 23) { | |
302 | day++; | |
303 | hr -= 24; | |
304 | } | |
305 | if (day > 31) { | |
306 | mo++; | |
307 | day -= 31; | |
308 | } | |
309 | if (mo > 12) { | |
310 | yr++; | |
311 | mo -= 12; | |
312 | } | |
313 | if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) { | |
314 | BIN_TO_BCD(yr); | |
315 | BIN_TO_BCD(mo); | |
316 | BIN_TO_BCD(day); | |
317 | BIN_TO_BCD(hr); | |
318 | BIN_TO_BCD(min); | |
319 | BIN_TO_BCD(sec); | |
320 | } | |
321 | ||
322 | spin_lock_irq(&rtc_lock); | |
323 | /* | |
324 | * Disable alarm interrupt before setting alarm timer or else | |
325 | * when ACPI_EVENT_RTC is enabled, a spurious ACPI interrupt occurs | |
326 | */ | |
327 | rtc_control &= ~RTC_AIE; | |
328 | CMOS_WRITE(rtc_control, RTC_CONTROL); | |
329 | CMOS_READ(RTC_INTR_FLAGS); | |
330 | ||
331 | /* write the fields the rtc knows about */ | |
332 | CMOS_WRITE(hr, RTC_HOURS_ALARM); | |
333 | CMOS_WRITE(min, RTC_MINUTES_ALARM); | |
334 | CMOS_WRITE(sec, RTC_SECONDS_ALARM); | |
335 | ||
336 | /* | |
337 | * If the system supports an enhanced alarm it will have non-zero | |
338 | * offsets into the CMOS RAM here -- which for some reason are pointing | |
339 | * to the RTC area of memory. | |
340 | */ | |
341 | if (acpi_gbl_FADT->day_alrm) | |
342 | CMOS_WRITE(day, acpi_gbl_FADT->day_alrm); | |
343 | if (acpi_gbl_FADT->mon_alrm) | |
344 | CMOS_WRITE(mo, acpi_gbl_FADT->mon_alrm); | |
345 | if (acpi_gbl_FADT->century) | |
346 | CMOS_WRITE(yr/100, acpi_gbl_FADT->century); | |
347 | /* enable the rtc alarm interrupt */ | |
348 | rtc_control |= RTC_AIE; | |
349 | CMOS_WRITE(rtc_control, RTC_CONTROL); | |
350 | CMOS_READ(RTC_INTR_FLAGS); | |
351 | ||
352 | spin_unlock_irq(&rtc_lock); | |
353 | ||
354 | acpi_clear_event(ACPI_EVENT_RTC); | |
355 | acpi_enable_event(ACPI_EVENT_RTC, 0); | |
356 | ||
357 | *ppos += count; | |
358 | ||
359 | result = 0; | |
360 | end: | |
361 | return_VALUE(result ? result : count); | |
362 | } | |
363 | ||
364 | extern struct list_head acpi_wakeup_device_list; | |
365 | extern spinlock_t acpi_device_lock; | |
366 | ||
367 | static int | |
368 | acpi_system_wakeup_device_seq_show(struct seq_file *seq, void *offset) | |
369 | { | |
370 | struct list_head * node, * next; | |
371 | ||
372 | seq_printf(seq, "Device Sleep state Status\n"); | |
373 | ||
374 | spin_lock(&acpi_device_lock); | |
375 | list_for_each_safe(node, next, &acpi_wakeup_device_list) { | |
376 | struct acpi_device * dev = container_of(node, struct acpi_device, wakeup_list); | |
377 | ||
378 | if (!dev->wakeup.flags.valid) | |
379 | continue; | |
380 | spin_unlock(&acpi_device_lock); | |
381 | if (dev->wakeup.flags.run_wake) | |
382 | seq_printf(seq, "%4s %4d %8s\n", | |
383 | dev->pnp.bus_id, (u32) dev->wakeup.sleep_state, | |
384 | dev->wakeup.state.enabled ? "*enabled" : "*disabled"); | |
385 | else | |
386 | seq_printf(seq, "%4s %4d %8s\n", | |
387 | dev->pnp.bus_id, (u32) dev->wakeup.sleep_state, | |
388 | dev->wakeup.state.enabled ? "enabled" : "disabled"); | |
389 | spin_lock(&acpi_device_lock); | |
390 | } | |
391 | spin_unlock(&acpi_device_lock); | |
392 | return 0; | |
393 | } | |
394 | ||
395 | static ssize_t | |
396 | acpi_system_write_wakeup_device ( | |
397 | struct file *file, | |
398 | const char __user *buffer, | |
399 | size_t count, | |
400 | loff_t *ppos) | |
401 | { | |
402 | struct list_head * node, * next; | |
403 | char strbuf[5]; | |
404 | char str[5] = ""; | |
405 | int len = count; | |
406 | struct acpi_device *found_dev = NULL; | |
407 | ||
408 | if (len > 4) len = 4; | |
409 | ||
410 | if (copy_from_user(strbuf, buffer, len)) | |
411 | return -EFAULT; | |
412 | strbuf[len] = '\0'; | |
413 | sscanf(strbuf, "%s", str); | |
414 | ||
415 | spin_lock(&acpi_device_lock); | |
416 | list_for_each_safe(node, next, &acpi_wakeup_device_list) { | |
417 | struct acpi_device * dev = container_of(node, struct acpi_device, wakeup_list); | |
418 | if (!dev->wakeup.flags.valid) | |
419 | continue; | |
420 | ||
421 | if (!strncmp(dev->pnp.bus_id, str, 4)) { | |
422 | dev->wakeup.state.enabled = dev->wakeup.state.enabled ? 0:1; | |
423 | found_dev = dev; | |
424 | break; | |
425 | } | |
426 | } | |
427 | if (found_dev) { | |
428 | list_for_each_safe(node, next, &acpi_wakeup_device_list) { | |
429 | struct acpi_device * dev = container_of(node, | |
430 | struct acpi_device, wakeup_list); | |
431 | ||
432 | if ((dev != found_dev) && | |
433 | (dev->wakeup.gpe_number == found_dev->wakeup.gpe_number) && | |
434 | (dev->wakeup.gpe_device == found_dev->wakeup.gpe_device)) { | |
435 | printk(KERN_WARNING "ACPI: '%s' and '%s' have the same GPE, " | |
436 | "can't disable/enable one seperately\n", | |
437 | dev->pnp.bus_id, found_dev->pnp.bus_id); | |
438 | dev->wakeup.state.enabled = found_dev->wakeup.state.enabled; | |
439 | } | |
440 | } | |
441 | } | |
442 | spin_unlock(&acpi_device_lock); | |
443 | return count; | |
444 | } | |
445 | ||
446 | static int | |
447 | acpi_system_wakeup_device_open_fs(struct inode *inode, struct file *file) | |
448 | { | |
449 | return single_open(file, acpi_system_wakeup_device_seq_show, PDE(inode)->data); | |
450 | } | |
451 | ||
452 | static struct file_operations acpi_system_wakeup_device_fops = { | |
453 | .open = acpi_system_wakeup_device_open_fs, | |
454 | .read = seq_read, | |
455 | .write = acpi_system_write_wakeup_device, | |
456 | .llseek = seq_lseek, | |
457 | .release = single_release, | |
458 | }; | |
459 | ||
ebb6e1a6 | 460 | #ifdef CONFIG_ACPI_SLEEP_PROC_SLEEP |
1da177e4 LT |
461 | static struct file_operations acpi_system_sleep_fops = { |
462 | .open = acpi_system_sleep_open_fs, | |
463 | .read = seq_read, | |
464 | .write = acpi_system_write_sleep, | |
465 | .llseek = seq_lseek, | |
466 | .release = single_release, | |
467 | }; | |
ebb6e1a6 | 468 | #endif /* CONFIG_ACPI_SLEEP_PROC_SLEEP */ |
1da177e4 LT |
469 | |
470 | static struct file_operations acpi_system_alarm_fops = { | |
471 | .open = acpi_system_alarm_open_fs, | |
472 | .read = seq_read, | |
473 | .write = acpi_system_write_alarm, | |
474 | .llseek = seq_lseek, | |
475 | .release = single_release, | |
476 | }; | |
477 | ||
478 | ||
479 | static u32 rtc_handler(void * context) | |
480 | { | |
481 | acpi_clear_event(ACPI_EVENT_RTC); | |
482 | acpi_disable_event(ACPI_EVENT_RTC, 0); | |
483 | ||
484 | return ACPI_INTERRUPT_HANDLED; | |
485 | } | |
486 | ||
487 | static int acpi_sleep_proc_init(void) | |
488 | { | |
489 | struct proc_dir_entry *entry = NULL; | |
490 | ||
491 | if (acpi_disabled) | |
492 | return 0; | |
493 | ||
ebb6e1a6 | 494 | #ifdef CONFIG_ACPI_SLEEP_PROC_SLEEP |
1da177e4 LT |
495 | /* 'sleep' [R/W]*/ |
496 | entry = create_proc_entry(ACPI_SYSTEM_FILE_SLEEP, | |
497 | S_IFREG|S_IRUGO|S_IWUSR, acpi_root_dir); | |
498 | if (entry) | |
499 | entry->proc_fops = &acpi_system_sleep_fops; | |
ebb6e1a6 | 500 | #endif |
1da177e4 LT |
501 | |
502 | /* 'alarm' [R/W] */ | |
503 | entry = create_proc_entry(ACPI_SYSTEM_FILE_ALARM, | |
504 | S_IFREG|S_IRUGO|S_IWUSR, acpi_root_dir); | |
505 | if (entry) | |
506 | entry->proc_fops = &acpi_system_alarm_fops; | |
507 | ||
508 | /* 'wakeup device' [R/W]*/ | |
509 | entry = create_proc_entry(ACPI_SYSTEM_FILE_WAKEUP_DEVICE, | |
510 | S_IFREG|S_IRUGO|S_IWUSR, acpi_root_dir); | |
511 | if (entry) | |
512 | entry->proc_fops = &acpi_system_wakeup_device_fops; | |
513 | ||
514 | acpi_install_fixed_event_handler(ACPI_EVENT_RTC, rtc_handler, NULL); | |
515 | return 0; | |
516 | } | |
517 | ||
518 | late_initcall(acpi_sleep_proc_init); |