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
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
88 ACPI_FUNCTION_TRACE("acpi_system_alarm_seq_show");
89
90 spin_lock(&rtc_lock);
91
92 sec = CMOS_READ(RTC_SECONDS_ALARM);
93 min = CMOS_READ(RTC_MINUTES_ALARM);
94 hr = CMOS_READ(RTC_HOURS_ALARM);
95 rtc_control = CMOS_READ(RTC_CONTROL);
96
97
98 if (acpi_gbl_FADT->day_alrm)
99
100 day = CMOS_READ(acpi_gbl_FADT->day_alrm) & 0x3F;
101 else
102 day = CMOS_READ(RTC_DAY_OF_MONTH);
103 if (acpi_gbl_FADT->mon_alrm)
104 mo = CMOS_READ(acpi_gbl_FADT->mon_alrm);
105 else
106 mo = CMOS_READ(RTC_MONTH);
107 if (acpi_gbl_FADT->century)
108 yr = CMOS_READ(acpi_gbl_FADT->century) * 100 + CMOS_READ(RTC_YEAR);
109 else
110 yr = CMOS_READ(RTC_YEAR);
111
112 spin_unlock(&rtc_lock);
113
114 if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
115 BCD_TO_BIN(sec);
116 BCD_TO_BIN(min);
117 BCD_TO_BIN(hr);
118 BCD_TO_BIN(day);
119 BCD_TO_BIN(mo);
120 BCD_TO_BIN(yr);
121 }
122
123
124 if (!acpi_gbl_FADT->century)
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143 yr += 2000;
144
145 seq_printf(seq,"%4.4u-", yr);
146 (mo > 12) ? seq_puts(seq, "**-") : seq_printf(seq, "%2.2u-", mo);
147 (day > 31) ? seq_puts(seq, "** ") : seq_printf(seq, "%2.2u ", day);
148 (hr > 23) ? seq_puts(seq, "**:") : seq_printf(seq, "%2.2u:", hr);
149 (min > 59) ? seq_puts(seq, "**:") : seq_printf(seq, "%2.2u:", min);
150 (sec > 59) ? seq_puts(seq, "**\n") : seq_printf(seq, "%2.2u\n", sec);
151
152 return 0;
153}
154
155static int acpi_system_alarm_open_fs(struct inode *inode, struct file *file)
156{
157 return single_open(file, acpi_system_alarm_seq_show, PDE(inode)->data);
158}
159
160
161static int
162get_date_field (
163 char **p,
164 u32 *value)
165{
166 char *next = NULL;
167 char *string_end = NULL;
168 int result = -EINVAL;
169
170
171
172
173
174 next = strpbrk(*p, "- :");
175 if (next)
176 *next++ = '\0';
177
178 *value = simple_strtoul(*p, &string_end, 10);
179
180
181 if (string_end != *p)
182 result = 0;
183
184 if (next)
185 *p = next;
186
187 return result;
188}
189
190
191static ssize_t
192acpi_system_write_alarm (
193 struct file *file,
194 const char __user *buffer,
195 size_t count,
196 loff_t *ppos)
197{
198 int result = 0;
199 char alarm_string[30] = {'\0'};
200 char *p = alarm_string;
201 u32 sec, min, hr, day, mo, yr;
202 int adjust = 0;
203 unsigned char rtc_control = 0;
204
205 ACPI_FUNCTION_TRACE("acpi_system_write_alarm");
206
207 if (count > sizeof(alarm_string) - 1)
208 return_VALUE(-EINVAL);
209
210 if (copy_from_user(alarm_string, buffer, count))
211 return_VALUE(-EFAULT);
212
213 alarm_string[count] = '\0';
214
215
216 if (alarm_string[0] == '+') {
217 p++;
218 adjust = 1;
219 }
220
221 if ((result = get_date_field(&p, &yr)))
222 goto end;
223 if ((result = get_date_field(&p, &mo)))
224 goto end;
225 if ((result = get_date_field(&p, &day)))
226 goto end;
227 if ((result = get_date_field(&p, &hr)))
228 goto end;
229 if ((result = get_date_field(&p, &min)))
230 goto end;
231 if ((result = get_date_field(&p, &sec)))
232 goto end;
233
234 if (sec > 59) {
235 min += 1;
236 sec -= 60;
237 }
238 if (min > 59) {
239 hr += 1;
240 min -= 60;
241 }
242 if (hr > 23) {
243 day += 1;
244 hr -= 24;
245 }
246 if (day > 31) {
247 mo += 1;
248 day -= 31;
249 }
250 if (mo > 12) {
251 yr += 1;
252 mo -= 12;
253 }
254
255 spin_lock_irq(&rtc_lock);
256
257 rtc_control = CMOS_READ(RTC_CONTROL);
258 if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
259 BIN_TO_BCD(yr);
260 BIN_TO_BCD(mo);
261 BIN_TO_BCD(day);
262 BIN_TO_BCD(hr);
263 BIN_TO_BCD(min);
264 BIN_TO_BCD(sec);
265 }
266
267 if (adjust) {
268 yr += CMOS_READ(RTC_YEAR);
269 mo += CMOS_READ(RTC_MONTH);
270 day += CMOS_READ(RTC_DAY_OF_MONTH);
271 hr += CMOS_READ(RTC_HOURS);
272 min += CMOS_READ(RTC_MINUTES);
273 sec += CMOS_READ(RTC_SECONDS);
274 }
275
276 spin_unlock_irq(&rtc_lock);
277
278 if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
279 BCD_TO_BIN(yr);
280 BCD_TO_BIN(mo);
281 BCD_TO_BIN(day);
282 BCD_TO_BIN(hr);
283 BCD_TO_BIN(min);
284 BCD_TO_BIN(sec);
285 }
286
287 if (sec > 59) {
288 min++;
289 sec -= 60;
290 }
291 if (min > 59) {
292 hr++;
293 min -= 60;
294 }
295 if (hr > 23) {
296 day++;
297 hr -= 24;
298 }
299 if (day > 31) {
300 mo++;
301 day -= 31;
302 }
303 if (mo > 12) {
304 yr++;
305 mo -= 12;
306 }
307 if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
308 BIN_TO_BCD(yr);
309 BIN_TO_BCD(mo);
310 BIN_TO_BCD(day);
311 BIN_TO_BCD(hr);
312 BIN_TO_BCD(min);
313 BIN_TO_BCD(sec);
314 }
315
316 spin_lock_irq(&rtc_lock);
317
318
319
320
321 rtc_control &= ~RTC_AIE;
322 CMOS_WRITE(rtc_control, RTC_CONTROL);
323 CMOS_READ(RTC_INTR_FLAGS);
324
325
326 CMOS_WRITE(hr, RTC_HOURS_ALARM);
327 CMOS_WRITE(min, RTC_MINUTES_ALARM);
328 CMOS_WRITE(sec, RTC_SECONDS_ALARM);
329
330
331
332
333
334
335 if (acpi_gbl_FADT->day_alrm)
336 CMOS_WRITE(day, acpi_gbl_FADT->day_alrm);
337 if (acpi_gbl_FADT->mon_alrm)
338 CMOS_WRITE(mo, acpi_gbl_FADT->mon_alrm);
339 if (acpi_gbl_FADT->century)
340 CMOS_WRITE(yr/100, acpi_gbl_FADT->century);
341
342 rtc_control |= RTC_AIE;
343 CMOS_WRITE(rtc_control, RTC_CONTROL);
344 CMOS_READ(RTC_INTR_FLAGS);
345
346 spin_unlock_irq(&rtc_lock);
347
348 acpi_clear_event(ACPI_EVENT_RTC);
349 acpi_enable_event(ACPI_EVENT_RTC, 0);
350
351 *ppos += count;
352
353 result = 0;
354end:
355 return_VALUE(result ? result : count);
356}
357
358extern struct list_head acpi_wakeup_device_list;
359extern spinlock_t acpi_device_lock;
360
361static int
362acpi_system_wakeup_device_seq_show(struct seq_file *seq, void *offset)
363{
364 struct list_head * node, * next;
365
366 seq_printf(seq, "Device Sleep state Status\n");
367
368 spin_lock(&acpi_device_lock);
369 list_for_each_safe(node, next, &acpi_wakeup_device_list) {
370 struct acpi_device * dev = container_of(node, struct acpi_device, wakeup_list);
371
372 if (!dev->wakeup.flags.valid)
373 continue;
374 spin_unlock(&acpi_device_lock);
375 if (dev->wakeup.flags.run_wake)
376 seq_printf(seq, "%4s %4d %8s\n",
377 dev->pnp.bus_id, (u32) dev->wakeup.sleep_state,
378 dev->wakeup.state.enabled ? "*enabled" : "*disabled");
379 else
380 seq_printf(seq, "%4s %4d %8s\n",
381 dev->pnp.bus_id, (u32) dev->wakeup.sleep_state,
382 dev->wakeup.state.enabled ? "enabled" : "disabled");
383 spin_lock(&acpi_device_lock);
384 }
385 spin_unlock(&acpi_device_lock);
386 return 0;
387}
388
389static ssize_t
390acpi_system_write_wakeup_device (
391 struct file *file,
392 const char __user *buffer,
393 size_t count,
394 loff_t *ppos)
395{
396 struct list_head * node, * next;
397 char strbuf[5];
398 char str[5] = "";
399 int len = count;
400 struct acpi_device *found_dev = NULL;
401
402 if (len > 4) len = 4;
403
404 if (copy_from_user(strbuf, buffer, len))
405 return -EFAULT;
406 strbuf[len] = '\0';
407 sscanf(strbuf, "%s", str);
408
409 spin_lock(&acpi_device_lock);
410 list_for_each_safe(node, next, &acpi_wakeup_device_list) {
411 struct acpi_device * dev = container_of(node, struct acpi_device, wakeup_list);
412 if (!dev->wakeup.flags.valid)
413 continue;
414
415 if (!strncmp(dev->pnp.bus_id, str, 4)) {
416 dev->wakeup.state.enabled = dev->wakeup.state.enabled ? 0:1;
417 found_dev = dev;
418 break;
419 }
420 }
421 if (found_dev) {
422 list_for_each_safe(node, next, &acpi_wakeup_device_list) {
423 struct acpi_device * dev = container_of(node,
424 struct acpi_device, wakeup_list);
425
426 if ((dev != found_dev) &&
427 (dev->wakeup.gpe_number == found_dev->wakeup.gpe_number) &&
428 (dev->wakeup.gpe_device == found_dev->wakeup.gpe_device)) {
429 printk(KERN_WARNING "ACPI: '%s' and '%s' have the same GPE, "
430 "can't disable/enable one seperately\n",
431 dev->pnp.bus_id, found_dev->pnp.bus_id);
432 dev->wakeup.state.enabled = found_dev->wakeup.state.enabled;
433 }
434 }
435 }
436 spin_unlock(&acpi_device_lock);
437 return count;
438}
439
440static int
441acpi_system_wakeup_device_open_fs(struct inode *inode, struct file *file)
442{
443 return single_open(file, acpi_system_wakeup_device_seq_show, PDE(inode)->data);
444}
445
446static struct file_operations acpi_system_wakeup_device_fops = {
447 .open = acpi_system_wakeup_device_open_fs,
448 .read = seq_read,
449 .write = acpi_system_write_wakeup_device,
450 .llseek = seq_lseek,
451 .release = single_release,
452};
453
454static struct file_operations acpi_system_sleep_fops = {
455 .open = acpi_system_sleep_open_fs,
456 .read = seq_read,
457 .write = acpi_system_write_sleep,
458 .llseek = seq_lseek,
459 .release = single_release,
460};
461
462static struct file_operations acpi_system_alarm_fops = {
463 .open = acpi_system_alarm_open_fs,
464 .read = seq_read,
465 .write = acpi_system_write_alarm,
466 .llseek = seq_lseek,
467 .release = single_release,
468};
469
470
471static u32 rtc_handler(void * context)
472{
473 acpi_clear_event(ACPI_EVENT_RTC);
474 acpi_disable_event(ACPI_EVENT_RTC, 0);
475
476 return ACPI_INTERRUPT_HANDLED;
477}
478
479static int acpi_sleep_proc_init(void)
480{
481 struct proc_dir_entry *entry = NULL;
482
483 if (acpi_disabled)
484 return 0;
485
486
487 entry = create_proc_entry(ACPI_SYSTEM_FILE_SLEEP,
488 S_IFREG|S_IRUGO|S_IWUSR, acpi_root_dir);
489 if (entry)
490 entry->proc_fops = &acpi_system_sleep_fops;
491
492
493 entry = create_proc_entry(ACPI_SYSTEM_FILE_ALARM,
494 S_IFREG|S_IRUGO|S_IWUSR, acpi_root_dir);
495 if (entry)
496 entry->proc_fops = &acpi_system_alarm_fops;
497
498
499 entry = create_proc_entry(ACPI_SYSTEM_FILE_WAKEUP_DEVICE,
500 S_IFREG|S_IRUGO|S_IWUSR, acpi_root_dir);
501 if (entry)
502 entry->proc_fops = &acpi_system_wakeup_device_fops;
503
504 acpi_install_fixed_event_handler(ACPI_EVENT_RTC, rtc_handler, NULL);
505 return 0;
506}
507
508late_initcall(acpi_sleep_proc_init);
509
