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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 | ||
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 | |
21 | ACPI_MODULE_NAME ("sleep") | |
22 | ||
23 | ||
24 | static 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 | ||
43 | static 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 | ||
48 | static ssize_t | |
49 | acpi_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 | ||
82 | static 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 | ||
156 | static 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 | ||
162 | static int | |
163 | get_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 | ||
192 | static ssize_t | |
193 | acpi_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; | |
355 | end: | |
356 | return_VALUE(result ? result : count); | |
357 | } | |
358 | ||
359 | extern struct list_head acpi_wakeup_device_list; | |
360 | extern spinlock_t acpi_device_lock; | |
361 | ||
362 | static int | |
363 | acpi_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 | ||
390 | static ssize_t | |
391 | acpi_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 | ||
441 | static int | |
442 | acpi_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 | ||
447 | static 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 | ||
455 | static 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 | ||
463 | static 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 | ||
472 | static 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 | ||
480 | static 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 | ||
509 | late_initcall(acpi_sleep_proc_init); |