1 #include <linux/proc_fs.h>
2 #include <linux/seq_file.h>
3 #include <linux/suspend.h>
5 #include <asm/uaccess.h>
7 #include <acpi/acpi_bus.h>
8 #include <acpi/acpi_drivers.h>
11 #include <linux/mc146818rtc.h>
16 #define ACPI_SYSTEM_FILE_SLEEP "sleep"
17 #define ACPI_SYSTEM_FILE_ALARM "alarm"
18 #define ACPI_SYSTEM_FILE_WAKEUP_DEVICE "wakeup"
20 #define _COMPONENT ACPI_SYSTEM_COMPONENT
21 ACPI_MODULE_NAME ("sleep")
24 static int acpi_system_sleep_seq_show(struct seq_file *seq, void *offset)
28 ACPI_FUNCTION_TRACE("acpi_system_sleep_seq_show");
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 ");
43 static int acpi_system_sleep_open_fs(struct inode *inode, struct file *file)
45 return single_open(file, acpi_system_sleep_seq_show, PDE(inode)->data);
49 acpi_system_write_sleep (
51 const char __user *buffer,
59 if (count > sizeof(str) - 1)
61 memset(str,0,sizeof(str));
62 if (copy_from_user(str, buffer, count))
65 /* Check for S4 bios request */
66 if (!strcmp(str,"4b")) {
67 error = acpi_suspend(4);
70 state = simple_strtoul(str, NULL, 0);
71 #ifdef CONFIG_SOFTWARE_SUSPEND
77 error = acpi_suspend(state);
79 return error ? error : count;
82 static int acpi_system_alarm_seq_show(struct seq_file *seq, void *offset)
87 ACPI_FUNCTION_TRACE("acpi_system_alarm_seq_show");
91 sec = CMOS_READ(RTC_SECONDS_ALARM);
92 min = CMOS_READ(RTC_MINUTES_ALARM);
93 hr = CMOS_READ(RTC_HOURS_ALARM);
95 #if 0 /* If we ever get an FACP with proper values... */
96 if (acpi_gbl_FADT->day_alrm)
97 day = CMOS_READ(acpi_gbl_FADT->day_alrm);
99 day = CMOS_READ(RTC_DAY_OF_MONTH);
100 if (acpi_gbl_FADT->mon_alrm)
101 mo = CMOS_READ(acpi_gbl_FADT->mon_alrm);
103 mo = CMOS_READ(RTC_MONTH);
104 if (acpi_gbl_FADT->century)
105 yr = CMOS_READ(acpi_gbl_FADT->century) * 100 + CMOS_READ(RTC_YEAR);
107 yr = CMOS_READ(RTC_YEAR);
109 day = CMOS_READ(RTC_DAY_OF_MONTH);
110 mo = CMOS_READ(RTC_MONTH);
111 yr = CMOS_READ(RTC_YEAR);
114 spin_unlock(&rtc_lock);
124 /* we're trusting the FADT (see above)*/
126 /* If we're not trusting the FADT, we should at least make it
127 * right for _this_ century... ehm, what is _this_ century?
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...
134 * if that has not happened, change for first release in 2050:
138 * yr += 2000; // current line of code
140 * if that has not happened either, please do on 2099/12/31:23:59:59
147 seq_printf(seq,"%4.4u-", yr);
148 (mo > 12) ? seq_puts(seq, "**-") : seq_printf(seq, "%2.2u-", mo);
149 (day > 31) ? seq_puts(seq, "** ") : seq_printf(seq, "%2.2u ", day);
150 (hr > 23) ? seq_puts(seq, "**:") : seq_printf(seq, "%2.2u:", hr);
151 (min > 59) ? seq_puts(seq, "**:") : seq_printf(seq, "%2.2u:", min);
152 (sec > 59) ? seq_puts(seq, "**\n") : seq_printf(seq, "%2.2u\n", sec);
157 static int acpi_system_alarm_open_fs(struct inode *inode, struct file *file)
159 return single_open(file, acpi_system_alarm_seq_show, PDE(inode)->data);
169 char *string_end = NULL;
170 int result = -EINVAL;
173 * Try to find delimeter, only to insert null. The end of the
174 * string won't have one, but is still valid.
176 next = strpbrk(*p, "- :");
180 *value = simple_strtoul(*p, &string_end, 10);
182 /* Signal success if we got a good digit */
183 if (string_end != *p)
194 acpi_system_write_alarm (
196 const char __user *buffer,
201 char alarm_string[30] = {'\0'};
202 char *p = alarm_string;
203 u32 sec, min, hr, day, mo, yr;
205 unsigned char rtc_control = 0;
207 ACPI_FUNCTION_TRACE("acpi_system_write_alarm");
209 if (count > sizeof(alarm_string) - 1)
210 return_VALUE(-EINVAL);
212 if (copy_from_user(alarm_string, buffer, count))
213 return_VALUE(-EFAULT);
215 alarm_string[count] = '\0';
217 /* check for time adjustment */
218 if (alarm_string[0] == '+') {
223 if ((result = get_date_field(&p, &yr)))
225 if ((result = get_date_field(&p, &mo)))
227 if ((result = get_date_field(&p, &day)))
229 if ((result = get_date_field(&p, &hr)))
231 if ((result = get_date_field(&p, &min)))
233 if ((result = get_date_field(&p, &sec)))
257 spin_lock_irq(&rtc_lock);
259 rtc_control = CMOS_READ(RTC_CONTROL);
260 if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
270 yr += CMOS_READ(RTC_YEAR);
271 mo += CMOS_READ(RTC_MONTH);
272 day += CMOS_READ(RTC_DAY_OF_MONTH);
273 hr += CMOS_READ(RTC_HOURS);
274 min += CMOS_READ(RTC_MINUTES);
275 sec += CMOS_READ(RTC_SECONDS);
278 spin_unlock_irq(&rtc_lock);
280 if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
309 if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
318 spin_lock_irq(&rtc_lock);
320 /* write the fields the rtc knows about */
321 CMOS_WRITE(hr, RTC_HOURS_ALARM);
322 CMOS_WRITE(min, RTC_MINUTES_ALARM);
323 CMOS_WRITE(sec, RTC_SECONDS_ALARM);
326 * If the system supports an enhanced alarm it will have non-zero
327 * offsets into the CMOS RAM here -- which for some reason are pointing
328 * to the RTC area of memory.
331 if (acpi_gbl_FADT->day_alrm)
332 CMOS_WRITE(day, acpi_gbl_FADT->day_alrm);
333 if (acpi_gbl_FADT->mon_alrm)
334 CMOS_WRITE(mo, acpi_gbl_FADT->mon_alrm);
335 if (acpi_gbl_FADT->century)
336 CMOS_WRITE(yr/100, acpi_gbl_FADT->century);
338 /* enable the rtc alarm interrupt */
339 if (!(rtc_control & RTC_AIE)) {
340 rtc_control |= RTC_AIE;
341 CMOS_WRITE(rtc_control,RTC_CONTROL);
342 CMOS_READ(RTC_INTR_FLAGS);
345 spin_unlock_irq(&rtc_lock);
347 acpi_set_register(ACPI_BITREG_RT_CLOCK_ENABLE, 1, ACPI_MTX_LOCK);
353 return_VALUE(result ? result : count);
356 extern struct list_head acpi_wakeup_device_list;
357 extern spinlock_t acpi_device_lock;
360 acpi_system_wakeup_device_seq_show(struct seq_file *seq, void *offset)
362 struct list_head * node, * next;
364 seq_printf(seq, "Device Sleep state Status\n");
366 spin_lock(&acpi_device_lock);
367 list_for_each_safe(node, next, &acpi_wakeup_device_list) {
368 struct acpi_device * dev = container_of(node, struct acpi_device, wakeup_list);
370 if (!dev->wakeup.flags.valid)
372 spin_unlock(&acpi_device_lock);
373 if (dev->wakeup.flags.run_wake)
374 seq_printf(seq, "%4s %4d %8s\n",
375 dev->pnp.bus_id, (u32) dev->wakeup.sleep_state,
376 dev->wakeup.state.enabled ? "*enabled" : "*disabled");
378 seq_printf(seq, "%4s %4d %8s\n",
379 dev->pnp.bus_id, (u32) dev->wakeup.sleep_state,
380 dev->wakeup.state.enabled ? "enabled" : "disabled");
381 spin_lock(&acpi_device_lock);
383 spin_unlock(&acpi_device_lock);
388 acpi_system_write_wakeup_device (
390 const char __user *buffer,
394 struct list_head * node, * next;
399 if (len > 4) len = 4;
401 if (copy_from_user(strbuf, buffer, len))
404 sscanf(strbuf, "%s", str);
406 spin_lock(&acpi_device_lock);
407 list_for_each_safe(node, next, &acpi_wakeup_device_list) {
408 struct acpi_device * dev = container_of(node, struct acpi_device, wakeup_list);
409 if (!dev->wakeup.flags.valid)
412 if (!strncmp(dev->pnp.bus_id, str, 4)) {
413 dev->wakeup.state.enabled = dev->wakeup.state.enabled ? 0:1;
417 spin_unlock(&acpi_device_lock);
422 acpi_system_wakeup_device_open_fs(struct inode *inode, struct file *file)
424 return single_open(file, acpi_system_wakeup_device_seq_show, PDE(inode)->data);
427 static struct file_operations acpi_system_wakeup_device_fops = {
428 .open = acpi_system_wakeup_device_open_fs,
430 .write = acpi_system_write_wakeup_device,
432 .release = single_release,
435 static struct file_operations acpi_system_sleep_fops = {
436 .open = acpi_system_sleep_open_fs,
438 .write = acpi_system_write_sleep,
440 .release = single_release,
443 static struct file_operations acpi_system_alarm_fops = {
444 .open = acpi_system_alarm_open_fs,
446 .write = acpi_system_write_alarm,
448 .release = single_release,
452 static int acpi_sleep_proc_init(void)
454 struct proc_dir_entry *entry = NULL;
460 entry = create_proc_entry(ACPI_SYSTEM_FILE_SLEEP,
461 S_IFREG|S_IRUGO|S_IWUSR, acpi_root_dir);
463 entry->proc_fops = &acpi_system_sleep_fops;
466 entry = create_proc_entry(ACPI_SYSTEM_FILE_ALARM,
467 S_IFREG|S_IRUGO|S_IWUSR, acpi_root_dir);
469 entry->proc_fops = &acpi_system_alarm_fops;
471 /* 'wakeup device' [R/W]*/
472 entry = create_proc_entry(ACPI_SYSTEM_FILE_WAKEUP_DEVICE,
473 S_IFREG|S_IRUGO|S_IWUSR, acpi_root_dir);
475 entry->proc_fops = &acpi_system_wakeup_device_fops;
480 late_initcall(acpi_sleep_proc_init);