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 #ifdef CONFIG_ACPI_SLEEP_PROC_SLEEP
17 #define ACPI_SYSTEM_FILE_SLEEP "sleep"
20 #define ACPI_SYSTEM_FILE_ALARM "alarm"
21 #define ACPI_SYSTEM_FILE_WAKEUP_DEVICE "wakeup"
23 #define _COMPONENT ACPI_SYSTEM_COMPONENT
24 ACPI_MODULE_NAME ("sleep")
26 #ifdef CONFIG_ACPI_SLEEP_PROC_SLEEP
28 static int acpi_system_sleep_seq_show(struct seq_file
*seq
, void *offset
)
32 ACPI_FUNCTION_TRACE("acpi_system_sleep_seq_show");
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 ");
47 static int acpi_system_sleep_open_fs(struct inode
*inode
, struct file
*file
)
49 return single_open(file
, acpi_system_sleep_seq_show
, PDE(inode
)->data
);
53 acpi_system_write_sleep (
55 const char __user
*buffer
,
63 if (count
> sizeof(str
) - 1)
65 memset(str
,0,sizeof(str
));
66 if (copy_from_user(str
, buffer
, count
))
69 /* Check for S4 bios request */
70 if (!strcmp(str
,"4b")) {
71 error
= acpi_suspend(4);
74 state
= simple_strtoul(str
, NULL
, 0);
75 #ifdef CONFIG_SOFTWARE_SUSPEND
77 error
= software_suspend();
81 error
= acpi_suspend(state
);
83 return error
? error
: count
;
85 #endif /* CONFIG_ACPI_SLEEP_PROC_SLEEP */
87 static int acpi_system_alarm_seq_show(struct seq_file
*seq
, void *offset
)
91 unsigned char rtc_control
= 0;
94 ACPI_FUNCTION_TRACE("acpi_system_alarm_seq_show");
96 spin_lock_irqsave(&rtc_lock
, flags
);
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
);
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;
108 day
= CMOS_READ(RTC_DAY_OF_MONTH
);
109 if (acpi_gbl_FADT
->mon_alrm
)
110 mo
= CMOS_READ(acpi_gbl_FADT
->mon_alrm
);
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
);
116 yr
= CMOS_READ(RTC_YEAR
);
118 spin_unlock_irqrestore(&rtc_lock
, flags
);
120 if (!(rtc_control
& RTC_DM_BINARY
) || RTC_ALWAYS_BCD
) {
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?
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...
139 * if that has not happened, change for first release in 2050:
143 * yr += 2000; // current line of code
145 * if that has not happened either, please do on 2099/12/31:23:59:59
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
);
161 static int acpi_system_alarm_open_fs(struct inode
*inode
, struct file
*file
)
163 return single_open(file
, acpi_system_alarm_seq_show
, PDE(inode
)->data
);
173 char *string_end
= NULL
;
174 int result
= -EINVAL
;
177 * Try to find delimeter, only to insert null. The end of the
178 * string won't have one, but is still valid.
180 next
= strpbrk(*p
, "- :");
184 *value
= simple_strtoul(*p
, &string_end
, 10);
186 /* Signal success if we got a good digit */
187 if (string_end
!= *p
)
198 acpi_system_write_alarm (
200 const char __user
*buffer
,
205 char alarm_string
[30] = {'\0'};
206 char *p
= alarm_string
;
207 u32 sec
, min
, hr
, day
, mo
, yr
;
209 unsigned char rtc_control
= 0;
211 ACPI_FUNCTION_TRACE("acpi_system_write_alarm");
213 if (count
> sizeof(alarm_string
) - 1)
214 return_VALUE(-EINVAL
);
216 if (copy_from_user(alarm_string
, buffer
, count
))
217 return_VALUE(-EFAULT
);
219 alarm_string
[count
] = '\0';
221 /* check for time adjustment */
222 if (alarm_string
[0] == '+') {
227 if ((result
= get_date_field(&p
, &yr
)))
229 if ((result
= get_date_field(&p
, &mo
)))
231 if ((result
= get_date_field(&p
, &day
)))
233 if ((result
= get_date_field(&p
, &hr
)))
235 if ((result
= get_date_field(&p
, &min
)))
237 if ((result
= get_date_field(&p
, &sec
)))
261 spin_lock_irq(&rtc_lock
);
263 rtc_control
= CMOS_READ(RTC_CONTROL
);
264 if (!(rtc_control
& RTC_DM_BINARY
) || RTC_ALWAYS_BCD
) {
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
);
282 spin_unlock_irq(&rtc_lock
);
284 if (!(rtc_control
& RTC_DM_BINARY
) || RTC_ALWAYS_BCD
) {
313 if (!(rtc_control
& RTC_DM_BINARY
) || RTC_ALWAYS_BCD
) {
322 spin_lock_irq(&rtc_lock
);
324 * Disable alarm interrupt before setting alarm timer or else
325 * when ACPI_EVENT_RTC is enabled, a spurious ACPI interrupt occurs
327 rtc_control
&= ~RTC_AIE
;
328 CMOS_WRITE(rtc_control
, RTC_CONTROL
);
329 CMOS_READ(RTC_INTR_FLAGS
);
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
);
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.
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
);
352 spin_unlock_irq(&rtc_lock
);
354 acpi_clear_event(ACPI_EVENT_RTC
);
355 acpi_enable_event(ACPI_EVENT_RTC
, 0);
361 return_VALUE(result
? result
: count
);
364 extern struct list_head acpi_wakeup_device_list
;
365 extern spinlock_t acpi_device_lock
;
368 acpi_system_wakeup_device_seq_show(struct seq_file
*seq
, void *offset
)
370 struct list_head
* node
, * next
;
372 seq_printf(seq
, "Device Sleep state Status\n");
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
);
378 if (!dev
->wakeup
.flags
.valid
)
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");
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
);
391 spin_unlock(&acpi_device_lock
);
396 acpi_system_write_wakeup_device (
398 const char __user
*buffer
,
402 struct list_head
* node
, * next
;
406 struct acpi_device
*found_dev
= NULL
;
408 if (len
> 4) len
= 4;
410 if (copy_from_user(strbuf
, buffer
, len
))
413 sscanf(strbuf
, "%s", str
);
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
)
421 if (!strncmp(dev
->pnp
.bus_id
, str
, 4)) {
422 dev
->wakeup
.state
.enabled
= dev
->wakeup
.state
.enabled
? 0:1;
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
);
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
;
442 spin_unlock(&acpi_device_lock
);
447 acpi_system_wakeup_device_open_fs(struct inode
*inode
, struct file
*file
)
449 return single_open(file
, acpi_system_wakeup_device_seq_show
, PDE(inode
)->data
);
452 static struct file_operations acpi_system_wakeup_device_fops
= {
453 .open
= acpi_system_wakeup_device_open_fs
,
455 .write
= acpi_system_write_wakeup_device
,
457 .release
= single_release
,
460 #ifdef CONFIG_ACPI_SLEEP_PROC_SLEEP
461 static struct file_operations acpi_system_sleep_fops
= {
462 .open
= acpi_system_sleep_open_fs
,
464 .write
= acpi_system_write_sleep
,
466 .release
= single_release
,
468 #endif /* CONFIG_ACPI_SLEEP_PROC_SLEEP */
470 static struct file_operations acpi_system_alarm_fops
= {
471 .open
= acpi_system_alarm_open_fs
,
473 .write
= acpi_system_write_alarm
,
475 .release
= single_release
,
479 static u32
rtc_handler(void * context
)
481 acpi_clear_event(ACPI_EVENT_RTC
);
482 acpi_disable_event(ACPI_EVENT_RTC
, 0);
484 return ACPI_INTERRUPT_HANDLED
;
487 static int acpi_sleep_proc_init(void)
489 struct proc_dir_entry
*entry
= NULL
;
494 #ifdef CONFIG_ACPI_SLEEP_PROC_SLEEP
496 entry
= create_proc_entry(ACPI_SYSTEM_FILE_SLEEP
,
497 S_IFREG
|S_IRUGO
|S_IWUSR
, acpi_root_dir
);
499 entry
->proc_fops
= &acpi_system_sleep_fops
;
503 entry
= create_proc_entry(ACPI_SYSTEM_FILE_ALARM
,
504 S_IFREG
|S_IRUGO
|S_IWUSR
, acpi_root_dir
);
506 entry
->proc_fops
= &acpi_system_alarm_fops
;
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
);
512 entry
->proc_fops
= &acpi_system_wakeup_device_fops
;
514 acpi_install_fixed_event_handler(ACPI_EVENT_RTC
, rtc_handler
, NULL
);
518 late_initcall(acpi_sleep_proc_init
);