Commit | Line | Data |
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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 | ||
1da177e4 | 16 | #define _COMPONENT ACPI_SYSTEM_COMPONENT |
4be44fcd | 17 | ACPI_MODULE_NAME("sleep") |
ebb6e1a6 | 18 | #ifdef CONFIG_ACPI_SLEEP_PROC_SLEEP |
1da177e4 LT |
19 | static int acpi_system_sleep_seq_show(struct seq_file *seq, void *offset) |
20 | { | |
4be44fcd | 21 | int i; |
1da177e4 LT |
22 | |
23 | ACPI_FUNCTION_TRACE("acpi_system_sleep_seq_show"); | |
24 | ||
25 | for (i = 0; i <= ACPI_STATE_S5; i++) { | |
26 | if (sleep_states[i]) { | |
4be44fcd | 27 | seq_printf(seq, "S%d ", i); |
1da177e4 LT |
28 | } |
29 | } | |
30 | ||
31 | seq_puts(seq, "\n"); | |
32 | ||
33 | return 0; | |
34 | } | |
35 | ||
36 | static int acpi_system_sleep_open_fs(struct inode *inode, struct file *file) | |
37 | { | |
38 | return single_open(file, acpi_system_sleep_seq_show, PDE(inode)->data); | |
39 | } | |
40 | ||
41 | static ssize_t | |
4be44fcd LB |
42 | acpi_system_write_sleep(struct file *file, |
43 | const char __user * buffer, size_t count, loff_t * ppos) | |
1da177e4 | 44 | { |
4be44fcd LB |
45 | char str[12]; |
46 | u32 state = 0; | |
47 | int error = 0; | |
1da177e4 LT |
48 | |
49 | if (count > sizeof(str) - 1) | |
50 | goto Done; | |
4be44fcd | 51 | memset(str, 0, sizeof(str)); |
1da177e4 LT |
52 | if (copy_from_user(str, buffer, count)) |
53 | return -EFAULT; | |
54 | ||
55 | /* Check for S4 bios request */ | |
4be44fcd | 56 | if (!strcmp(str, "4b")) { |
1da177e4 LT |
57 | error = acpi_suspend(4); |
58 | goto Done; | |
59 | } | |
60 | state = simple_strtoul(str, NULL, 0); | |
61 | #ifdef CONFIG_SOFTWARE_SUSPEND | |
62 | if (state == 4) { | |
63 | error = software_suspend(); | |
64 | goto Done; | |
65 | } | |
66 | #endif | |
67 | error = acpi_suspend(state); | |
4be44fcd | 68 | Done: |
1da177e4 LT |
69 | return error ? error : count; |
70 | } | |
4be44fcd | 71 | #endif /* CONFIG_ACPI_SLEEP_PROC_SLEEP */ |
1da177e4 LT |
72 | |
73 | static int acpi_system_alarm_seq_show(struct seq_file *seq, void *offset) | |
74 | { | |
4be44fcd LB |
75 | u32 sec, min, hr; |
76 | u32 day, mo, yr; | |
77 | unsigned char rtc_control = 0; | |
78 | unsigned long flags; | |
1da177e4 LT |
79 | |
80 | ACPI_FUNCTION_TRACE("acpi_system_alarm_seq_show"); | |
81 | ||
82 | spin_lock_irqsave(&rtc_lock, flags); | |
83 | ||
84 | sec = CMOS_READ(RTC_SECONDS_ALARM); | |
85 | min = CMOS_READ(RTC_MINUTES_ALARM); | |
86 | hr = CMOS_READ(RTC_HOURS_ALARM); | |
87 | rtc_control = CMOS_READ(RTC_CONTROL); | |
88 | ||
89 | /* If we ever get an FACP with proper values... */ | |
90 | if (acpi_gbl_FADT->day_alrm) | |
91 | /* ACPI spec: only low 6 its should be cared */ | |
92 | day = CMOS_READ(acpi_gbl_FADT->day_alrm) & 0x3F; | |
93 | else | |
4be44fcd | 94 | day = CMOS_READ(RTC_DAY_OF_MONTH); |
1da177e4 LT |
95 | if (acpi_gbl_FADT->mon_alrm) |
96 | mo = CMOS_READ(acpi_gbl_FADT->mon_alrm); | |
97 | else | |
98 | mo = CMOS_READ(RTC_MONTH); | |
99 | if (acpi_gbl_FADT->century) | |
4be44fcd LB |
100 | yr = CMOS_READ(acpi_gbl_FADT->century) * 100 + |
101 | CMOS_READ(RTC_YEAR); | |
1da177e4 LT |
102 | else |
103 | yr = CMOS_READ(RTC_YEAR); | |
104 | ||
105 | spin_unlock_irqrestore(&rtc_lock, flags); | |
106 | ||
107 | if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) { | |
108 | BCD_TO_BIN(sec); | |
109 | BCD_TO_BIN(min); | |
110 | BCD_TO_BIN(hr); | |
111 | BCD_TO_BIN(day); | |
112 | BCD_TO_BIN(mo); | |
113 | BCD_TO_BIN(yr); | |
114 | } | |
115 | ||
4be44fcd | 116 | /* we're trusting the FADT (see above) */ |
1da177e4 | 117 | if (!acpi_gbl_FADT->century) |
4be44fcd LB |
118 | /* If we're not trusting the FADT, we should at least make it |
119 | * right for _this_ century... ehm, what is _this_ century? | |
120 | * | |
121 | * TBD: | |
122 | * ASAP: find piece of code in the kernel, e.g. star tracker driver, | |
123 | * which we can trust to determine the century correctly. Atom | |
124 | * watch driver would be nice, too... | |
125 | * | |
126 | * if that has not happened, change for first release in 2050: | |
127 | * if (yr<50) | |
128 | * yr += 2100; | |
129 | * else | |
130 | * yr += 2000; // current line of code | |
131 | * | |
132 | * if that has not happened either, please do on 2099/12/31:23:59:59 | |
133 | * s/2000/2100 | |
134 | * | |
135 | */ | |
1da177e4 LT |
136 | yr += 2000; |
137 | ||
4be44fcd LB |
138 | seq_printf(seq, "%4.4u-", yr); |
139 | (mo > 12) ? seq_puts(seq, "**-") : seq_printf(seq, "%2.2u-", mo); | |
140 | (day > 31) ? seq_puts(seq, "** ") : seq_printf(seq, "%2.2u ", day); | |
141 | (hr > 23) ? seq_puts(seq, "**:") : seq_printf(seq, "%2.2u:", hr); | |
142 | (min > 59) ? seq_puts(seq, "**:") : seq_printf(seq, "%2.2u:", min); | |
1da177e4 LT |
143 | (sec > 59) ? seq_puts(seq, "**\n") : seq_printf(seq, "%2.2u\n", sec); |
144 | ||
145 | return 0; | |
146 | } | |
147 | ||
148 | static int acpi_system_alarm_open_fs(struct inode *inode, struct file *file) | |
149 | { | |
150 | return single_open(file, acpi_system_alarm_seq_show, PDE(inode)->data); | |
151 | } | |
152 | ||
4be44fcd | 153 | static int get_date_field(char **p, u32 * value) |
1da177e4 | 154 | { |
4be44fcd LB |
155 | char *next = NULL; |
156 | char *string_end = NULL; | |
157 | int result = -EINVAL; | |
1da177e4 LT |
158 | |
159 | /* | |
160 | * Try to find delimeter, only to insert null. The end of the | |
161 | * string won't have one, but is still valid. | |
162 | */ | |
163 | next = strpbrk(*p, "- :"); | |
164 | if (next) | |
165 | *next++ = '\0'; | |
166 | ||
167 | *value = simple_strtoul(*p, &string_end, 10); | |
168 | ||
169 | /* Signal success if we got a good digit */ | |
170 | if (string_end != *p) | |
171 | result = 0; | |
172 | ||
173 | if (next) | |
174 | *p = next; | |
175 | ||
176 | return result; | |
177 | } | |
178 | ||
1da177e4 | 179 | static ssize_t |
4be44fcd LB |
180 | acpi_system_write_alarm(struct file *file, |
181 | const char __user * buffer, size_t count, loff_t * ppos) | |
1da177e4 | 182 | { |
4be44fcd LB |
183 | int result = 0; |
184 | char alarm_string[30] = { '\0' }; | |
185 | char *p = alarm_string; | |
186 | u32 sec, min, hr, day, mo, yr; | |
187 | int adjust = 0; | |
188 | unsigned char rtc_control = 0; | |
1da177e4 LT |
189 | |
190 | ACPI_FUNCTION_TRACE("acpi_system_write_alarm"); | |
191 | ||
192 | if (count > sizeof(alarm_string) - 1) | |
193 | return_VALUE(-EINVAL); | |
4be44fcd | 194 | |
1da177e4 LT |
195 | if (copy_from_user(alarm_string, buffer, count)) |
196 | return_VALUE(-EFAULT); | |
197 | ||
198 | alarm_string[count] = '\0'; | |
199 | ||
200 | /* check for time adjustment */ | |
201 | if (alarm_string[0] == '+') { | |
202 | p++; | |
203 | adjust = 1; | |
204 | } | |
205 | ||
206 | if ((result = get_date_field(&p, &yr))) | |
207 | goto end; | |
208 | if ((result = get_date_field(&p, &mo))) | |
209 | goto end; | |
210 | if ((result = get_date_field(&p, &day))) | |
211 | goto end; | |
212 | if ((result = get_date_field(&p, &hr))) | |
213 | goto end; | |
214 | if ((result = get_date_field(&p, &min))) | |
215 | goto end; | |
216 | if ((result = get_date_field(&p, &sec))) | |
217 | goto end; | |
218 | ||
219 | if (sec > 59) { | |
220 | min += 1; | |
221 | sec -= 60; | |
222 | } | |
223 | if (min > 59) { | |
224 | hr += 1; | |
225 | min -= 60; | |
226 | } | |
227 | if (hr > 23) { | |
228 | day += 1; | |
229 | hr -= 24; | |
230 | } | |
231 | if (day > 31) { | |
232 | mo += 1; | |
233 | day -= 31; | |
234 | } | |
235 | if (mo > 12) { | |
236 | yr += 1; | |
237 | mo -= 12; | |
238 | } | |
239 | ||
240 | spin_lock_irq(&rtc_lock); | |
241 | ||
242 | rtc_control = CMOS_READ(RTC_CONTROL); | |
243 | if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) { | |
244 | BIN_TO_BCD(yr); | |
245 | BIN_TO_BCD(mo); | |
246 | BIN_TO_BCD(day); | |
247 | BIN_TO_BCD(hr); | |
248 | BIN_TO_BCD(min); | |
249 | BIN_TO_BCD(sec); | |
250 | } | |
251 | ||
252 | if (adjust) { | |
4be44fcd LB |
253 | yr += CMOS_READ(RTC_YEAR); |
254 | mo += CMOS_READ(RTC_MONTH); | |
1da177e4 | 255 | day += CMOS_READ(RTC_DAY_OF_MONTH); |
4be44fcd | 256 | hr += CMOS_READ(RTC_HOURS); |
1da177e4 LT |
257 | min += CMOS_READ(RTC_MINUTES); |
258 | sec += CMOS_READ(RTC_SECONDS); | |
259 | } | |
260 | ||
261 | spin_unlock_irq(&rtc_lock); | |
262 | ||
263 | if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) { | |
264 | BCD_TO_BIN(yr); | |
265 | BCD_TO_BIN(mo); | |
266 | BCD_TO_BIN(day); | |
267 | BCD_TO_BIN(hr); | |
268 | BCD_TO_BIN(min); | |
269 | BCD_TO_BIN(sec); | |
270 | } | |
271 | ||
272 | if (sec > 59) { | |
273 | min++; | |
274 | sec -= 60; | |
275 | } | |
276 | if (min > 59) { | |
277 | hr++; | |
278 | min -= 60; | |
279 | } | |
280 | if (hr > 23) { | |
281 | day++; | |
282 | hr -= 24; | |
283 | } | |
284 | if (day > 31) { | |
285 | mo++; | |
286 | day -= 31; | |
287 | } | |
288 | if (mo > 12) { | |
289 | yr++; | |
290 | mo -= 12; | |
291 | } | |
292 | if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) { | |
293 | BIN_TO_BCD(yr); | |
294 | BIN_TO_BCD(mo); | |
295 | BIN_TO_BCD(day); | |
296 | BIN_TO_BCD(hr); | |
297 | BIN_TO_BCD(min); | |
298 | BIN_TO_BCD(sec); | |
299 | } | |
300 | ||
301 | spin_lock_irq(&rtc_lock); | |
302 | /* | |
303 | * Disable alarm interrupt before setting alarm timer or else | |
304 | * when ACPI_EVENT_RTC is enabled, a spurious ACPI interrupt occurs | |
305 | */ | |
306 | rtc_control &= ~RTC_AIE; | |
307 | CMOS_WRITE(rtc_control, RTC_CONTROL); | |
308 | CMOS_READ(RTC_INTR_FLAGS); | |
309 | ||
310 | /* write the fields the rtc knows about */ | |
311 | CMOS_WRITE(hr, RTC_HOURS_ALARM); | |
312 | CMOS_WRITE(min, RTC_MINUTES_ALARM); | |
313 | CMOS_WRITE(sec, RTC_SECONDS_ALARM); | |
314 | ||
315 | /* | |
316 | * If the system supports an enhanced alarm it will have non-zero | |
317 | * offsets into the CMOS RAM here -- which for some reason are pointing | |
318 | * to the RTC area of memory. | |
319 | */ | |
320 | if (acpi_gbl_FADT->day_alrm) | |
321 | CMOS_WRITE(day, acpi_gbl_FADT->day_alrm); | |
322 | if (acpi_gbl_FADT->mon_alrm) | |
323 | CMOS_WRITE(mo, acpi_gbl_FADT->mon_alrm); | |
324 | if (acpi_gbl_FADT->century) | |
4be44fcd | 325 | CMOS_WRITE(yr / 100, acpi_gbl_FADT->century); |
1da177e4 LT |
326 | /* enable the rtc alarm interrupt */ |
327 | rtc_control |= RTC_AIE; | |
328 | CMOS_WRITE(rtc_control, RTC_CONTROL); | |
329 | CMOS_READ(RTC_INTR_FLAGS); | |
330 | ||
331 | spin_unlock_irq(&rtc_lock); | |
332 | ||
333 | acpi_clear_event(ACPI_EVENT_RTC); | |
334 | acpi_enable_event(ACPI_EVENT_RTC, 0); | |
335 | ||
336 | *ppos += count; | |
337 | ||
338 | result = 0; | |
4be44fcd | 339 | end: |
1da177e4 LT |
340 | return_VALUE(result ? result : count); |
341 | } | |
342 | ||
4be44fcd | 343 | extern struct list_head acpi_wakeup_device_list; |
1da177e4 LT |
344 | extern spinlock_t acpi_device_lock; |
345 | ||
346 | static int | |
347 | acpi_system_wakeup_device_seq_show(struct seq_file *seq, void *offset) | |
348 | { | |
4be44fcd | 349 | struct list_head *node, *next; |
1da177e4 LT |
350 | |
351 | seq_printf(seq, "Device Sleep state Status\n"); | |
352 | ||
353 | spin_lock(&acpi_device_lock); | |
354 | list_for_each_safe(node, next, &acpi_wakeup_device_list) { | |
4be44fcd LB |
355 | struct acpi_device *dev = |
356 | container_of(node, struct acpi_device, wakeup_list); | |
1da177e4 LT |
357 | |
358 | if (!dev->wakeup.flags.valid) | |
359 | continue; | |
360 | spin_unlock(&acpi_device_lock); | |
c65ade4d | 361 | seq_printf(seq, "%4s %4d %s%8s\n", |
4be44fcd LB |
362 | dev->pnp.bus_id, |
363 | (u32) dev->wakeup.sleep_state, | |
c65ade4d PM |
364 | dev->wakeup.flags.run_wake ? "*" : "", |
365 | dev->wakeup.state.enabled ? "enabled" : "disabled"); | |
1da177e4 LT |
366 | spin_lock(&acpi_device_lock); |
367 | } | |
368 | spin_unlock(&acpi_device_lock); | |
369 | return 0; | |
370 | } | |
371 | ||
372 | static ssize_t | |
4be44fcd LB |
373 | acpi_system_write_wakeup_device(struct file *file, |
374 | const char __user * buffer, | |
375 | size_t count, loff_t * ppos) | |
1da177e4 | 376 | { |
4be44fcd LB |
377 | struct list_head *node, *next; |
378 | char strbuf[5]; | |
379 | char str[5] = ""; | |
380 | int len = count; | |
1da177e4 LT |
381 | struct acpi_device *found_dev = NULL; |
382 | ||
4be44fcd LB |
383 | if (len > 4) |
384 | len = 4; | |
1da177e4 LT |
385 | |
386 | if (copy_from_user(strbuf, buffer, len)) | |
387 | return -EFAULT; | |
388 | strbuf[len] = '\0'; | |
389 | sscanf(strbuf, "%s", str); | |
390 | ||
391 | spin_lock(&acpi_device_lock); | |
392 | list_for_each_safe(node, next, &acpi_wakeup_device_list) { | |
4be44fcd LB |
393 | struct acpi_device *dev = |
394 | container_of(node, struct acpi_device, wakeup_list); | |
1da177e4 LT |
395 | if (!dev->wakeup.flags.valid) |
396 | continue; | |
397 | ||
398 | if (!strncmp(dev->pnp.bus_id, str, 4)) { | |
4be44fcd LB |
399 | dev->wakeup.state.enabled = |
400 | dev->wakeup.state.enabled ? 0 : 1; | |
1da177e4 LT |
401 | found_dev = dev; |
402 | break; | |
403 | } | |
404 | } | |
405 | if (found_dev) { | |
406 | list_for_each_safe(node, next, &acpi_wakeup_device_list) { | |
4be44fcd LB |
407 | struct acpi_device *dev = container_of(node, |
408 | struct | |
409 | acpi_device, | |
410 | wakeup_list); | |
1da177e4 LT |
411 | |
412 | if ((dev != found_dev) && | |
4be44fcd LB |
413 | (dev->wakeup.gpe_number == |
414 | found_dev->wakeup.gpe_number) | |
415 | && (dev->wakeup.gpe_device == | |
416 | found_dev->wakeup.gpe_device)) { | |
417 | printk(KERN_WARNING | |
418 | "ACPI: '%s' and '%s' have the same GPE, " | |
419 | "can't disable/enable one seperately\n", | |
420 | dev->pnp.bus_id, found_dev->pnp.bus_id); | |
421 | dev->wakeup.state.enabled = | |
422 | found_dev->wakeup.state.enabled; | |
1da177e4 LT |
423 | } |
424 | } | |
425 | } | |
426 | spin_unlock(&acpi_device_lock); | |
427 | return count; | |
428 | } | |
429 | ||
430 | static int | |
431 | acpi_system_wakeup_device_open_fs(struct inode *inode, struct file *file) | |
432 | { | |
4be44fcd LB |
433 | return single_open(file, acpi_system_wakeup_device_seq_show, |
434 | PDE(inode)->data); | |
1da177e4 LT |
435 | } |
436 | ||
d7508032 | 437 | static const struct file_operations acpi_system_wakeup_device_fops = { |
4be44fcd LB |
438 | .open = acpi_system_wakeup_device_open_fs, |
439 | .read = seq_read, | |
440 | .write = acpi_system_write_wakeup_device, | |
441 | .llseek = seq_lseek, | |
442 | .release = single_release, | |
1da177e4 LT |
443 | }; |
444 | ||
ebb6e1a6 | 445 | #ifdef CONFIG_ACPI_SLEEP_PROC_SLEEP |
d7508032 | 446 | static const struct file_operations acpi_system_sleep_fops = { |
4be44fcd LB |
447 | .open = acpi_system_sleep_open_fs, |
448 | .read = seq_read, | |
449 | .write = acpi_system_write_sleep, | |
450 | .llseek = seq_lseek, | |
451 | .release = single_release, | |
1da177e4 | 452 | }; |
4be44fcd | 453 | #endif /* CONFIG_ACPI_SLEEP_PROC_SLEEP */ |
1da177e4 | 454 | |
d7508032 | 455 | static const struct file_operations acpi_system_alarm_fops = { |
4be44fcd LB |
456 | .open = acpi_system_alarm_open_fs, |
457 | .read = seq_read, | |
458 | .write = acpi_system_write_alarm, | |
459 | .llseek = seq_lseek, | |
460 | .release = single_release, | |
1da177e4 LT |
461 | }; |
462 | ||
4be44fcd | 463 | static u32 rtc_handler(void *context) |
1da177e4 LT |
464 | { |
465 | acpi_clear_event(ACPI_EVENT_RTC); | |
466 | acpi_disable_event(ACPI_EVENT_RTC, 0); | |
467 | ||
468 | return ACPI_INTERRUPT_HANDLED; | |
469 | } | |
470 | ||
471 | static int acpi_sleep_proc_init(void) | |
472 | { | |
c65ade4d | 473 | struct proc_dir_entry *entry = NULL; |
1da177e4 LT |
474 | |
475 | if (acpi_disabled) | |
476 | return 0; | |
4be44fcd | 477 | |
ebb6e1a6 | 478 | #ifdef CONFIG_ACPI_SLEEP_PROC_SLEEP |
c65ade4d | 479 | /* 'sleep' [R/W] */ |
4be44fcd LB |
480 | entry = |
481 | create_proc_entry("sleep", S_IFREG | S_IRUGO | S_IWUSR, | |
482 | acpi_root_dir); | |
1da177e4 LT |
483 | if (entry) |
484 | entry->proc_fops = &acpi_system_sleep_fops; | |
ebb6e1a6 | 485 | #endif |
1da177e4 LT |
486 | |
487 | /* 'alarm' [R/W] */ | |
4be44fcd LB |
488 | entry = |
489 | create_proc_entry("alarm", S_IFREG | S_IRUGO | S_IWUSR, | |
490 | acpi_root_dir); | |
1da177e4 LT |
491 | if (entry) |
492 | entry->proc_fops = &acpi_system_alarm_fops; | |
493 | ||
c65ade4d | 494 | /* 'wakeup device' [R/W] */ |
4be44fcd LB |
495 | entry = |
496 | create_proc_entry("wakeup", S_IFREG | S_IRUGO | S_IWUSR, | |
497 | acpi_root_dir); | |
1da177e4 LT |
498 | if (entry) |
499 | entry->proc_fops = &acpi_system_wakeup_device_fops; | |
500 | ||
501 | acpi_install_fixed_event_handler(ACPI_EVENT_RTC, rtc_handler, NULL); | |
502 | return 0; | |
503 | } | |
504 | ||
505 | late_initcall(acpi_sleep_proc_init); |