[net-next-2.6.git] / drivers / acpi / sleep / proc.c

#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/suspend.h>
#include <linux/bcd.h>
#include <asm/uaccess.h>

#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>

#ifdef CONFIG_X86
#include <linux/mc146818rtc.h>
#endif

#include "sleep.h"

#define _COMPONENT		ACPI_SYSTEM_COMPONENT
ACPI_MODULE_NAME("sleep")
#ifdef	CONFIG_ACPI_SLEEP_PROC_SLEEP
static int acpi_system_sleep_seq_show(struct seq_file *seq, void *offset)
{
	int i;

	ACPI_FUNCTION_TRACE("acpi_system_sleep_seq_show");

	for (i = 0; i <= ACPI_STATE_S5; i++) {
		if (sleep_states[i]) {
			seq_printf(seq, "S%d ", i);
		}
	}

	seq_puts(seq, "\n");

	return 0;
}

static int acpi_system_sleep_open_fs(struct inode *inode, struct file *file)
{
	return single_open(file, acpi_system_sleep_seq_show, PDE(inode)->data);
}

static ssize_t
acpi_system_write_sleep(struct file *file,
			const char __user * buffer, size_t count, loff_t * ppos)
{
	char str[12];
	u32 state = 0;
	int error = 0;

	if (count > sizeof(str) - 1)
		goto Done;
	memset(str, 0, sizeof(str));
	if (copy_from_user(str, buffer, count))
		return -EFAULT;

	/* Check for S4 bios request */
	if (!strcmp(str, "4b")) {
		error = acpi_suspend(4);
		goto Done;
	}
	state = simple_strtoul(str, NULL, 0);
#ifdef CONFIG_SOFTWARE_SUSPEND
	if (state == 4) {
		error = software_suspend();
		goto Done;
	}
#endif
	error = acpi_suspend(state);
      Done:
	return error ? error : count;
}
#endif				/* CONFIG_ACPI_SLEEP_PROC_SLEEP */

static int acpi_system_alarm_seq_show(struct seq_file *seq, void *offset)
{
	u32 sec, min, hr;
	u32 day, mo, yr;
	unsigned char rtc_control = 0;
	unsigned long flags;

	ACPI_FUNCTION_TRACE("acpi_system_alarm_seq_show");

	spin_lock_irqsave(&rtc_lock, flags);

	sec = CMOS_READ(RTC_SECONDS_ALARM);
	min = CMOS_READ(RTC_MINUTES_ALARM);
	hr = CMOS_READ(RTC_HOURS_ALARM);
	rtc_control = CMOS_READ(RTC_CONTROL);

	/* If we ever get an FACP with proper values... */
	if (acpi_gbl_FADT->day_alrm)
		/* ACPI spec: only low 6 its should be cared */
		day = CMOS_READ(acpi_gbl_FADT->day_alrm) & 0x3F;
	else
		day = CMOS_READ(RTC_DAY_OF_MONTH);
	if (acpi_gbl_FADT->mon_alrm)
		mo = CMOS_READ(acpi_gbl_FADT->mon_alrm);
	else
		mo = CMOS_READ(RTC_MONTH);
	if (acpi_gbl_FADT->century)
		yr = CMOS_READ(acpi_gbl_FADT->century) * 100 +
		    CMOS_READ(RTC_YEAR);
	else
		yr = CMOS_READ(RTC_YEAR);

	spin_unlock_irqrestore(&rtc_lock, flags);

	if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
		BCD_TO_BIN(sec);
		BCD_TO_BIN(min);
		BCD_TO_BIN(hr);
		BCD_TO_BIN(day);
		BCD_TO_BIN(mo);
		BCD_TO_BIN(yr);
	}

	/* we're trusting the FADT (see above) */
	if (!acpi_gbl_FADT->century)
		/* If we're not trusting the FADT, we should at least make it
		 * right for _this_ century... ehm, what is _this_ century?
		 *
		 * TBD:
		 *  ASAP: find piece of code in the kernel, e.g. star tracker driver,
		 *        which we can trust to determine the century correctly. Atom
		 *        watch driver would be nice, too...
		 *
		 *  if that has not happened, change for first release in 2050:
		 *        if (yr<50)
		 *                yr += 2100;
		 *        else
		 *                yr += 2000;   // current line of code
		 *
		 *  if that has not happened either, please do on 2099/12/31:23:59:59
		 *        s/2000/2100
		 *
		 */
		yr += 2000;

	seq_printf(seq, "%4.4u-", yr);
	(mo > 12) ? seq_puts(seq, "**-") : seq_printf(seq, "%2.2u-", mo);
	(day > 31) ? seq_puts(seq, "** ") : seq_printf(seq, "%2.2u ", day);
	(hr > 23) ? seq_puts(seq, "**:") : seq_printf(seq, "%2.2u:", hr);
	(min > 59) ? seq_puts(seq, "**:") : seq_printf(seq, "%2.2u:", min);
	(sec > 59) ? seq_puts(seq, "**\n") : seq_printf(seq, "%2.2u\n", sec);

	return 0;
}

static int acpi_system_alarm_open_fs(struct inode *inode, struct file *file)
{
	return single_open(file, acpi_system_alarm_seq_show, PDE(inode)->data);
}

static int get_date_field(char **p, u32 * value)
{
	char *next = NULL;
	char *string_end = NULL;
	int result = -EINVAL;

	/*
	 * Try to find delimeter, only to insert null.  The end of the
	 * string won't have one, but is still valid.
	 */
	next = strpbrk(*p, "- :");
	if (next)
		*next++ = '\0';

	*value = simple_strtoul(*p, &string_end, 10);

	/* Signal success if we got a good digit */
	if (string_end != *p)
		result = 0;

	if (next)
		*p = next;

	return result;
}

static ssize_t
acpi_system_write_alarm(struct file *file,
			const char __user * buffer, size_t count, loff_t * ppos)
{
	int result = 0;
	char alarm_string[30] = { '\0' };
	char *p = alarm_string;
	u32 sec, min, hr, day, mo, yr;
	int adjust = 0;
	unsigned char rtc_control = 0;

	ACPI_FUNCTION_TRACE("acpi_system_write_alarm");

	if (count > sizeof(alarm_string) - 1)
		return_VALUE(-EINVAL);

	if (copy_from_user(alarm_string, buffer, count))
		return_VALUE(-EFAULT);

	alarm_string[count] = '\0';

	/* check for time adjustment */
	if (alarm_string[0] == '+') {
		p++;
		adjust = 1;
	}

	if ((result = get_date_field(&p, &yr)))
		goto end;
	if ((result = get_date_field(&p, &mo)))
		goto end;
	if ((result = get_date_field(&p, &day)))
		goto end;
	if ((result = get_date_field(&p, &hr)))
		goto end;
	if ((result = get_date_field(&p, &min)))
		goto end;
	if ((result = get_date_field(&p, &sec)))
		goto end;

	if (sec > 59) {
		min += 1;
		sec -= 60;
	}
	if (min > 59) {
		hr += 1;
		min -= 60;
	}
	if (hr > 23) {
		day += 1;
		hr -= 24;
	}
	if (day > 31) {
		mo += 1;
		day -= 31;
	}
	if (mo > 12) {
		yr += 1;
		mo -= 12;
	}

	spin_lock_irq(&rtc_lock);

	rtc_control = CMOS_READ(RTC_CONTROL);
	if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
		BIN_TO_BCD(yr);
		BIN_TO_BCD(mo);
		BIN_TO_BCD(day);
		BIN_TO_BCD(hr);
		BIN_TO_BCD(min);
		BIN_TO_BCD(sec);
	}

	if (adjust) {
		yr += CMOS_READ(RTC_YEAR);
		mo += CMOS_READ(RTC_MONTH);
		day += CMOS_READ(RTC_DAY_OF_MONTH);
		hr += CMOS_READ(RTC_HOURS);
		min += CMOS_READ(RTC_MINUTES);
		sec += CMOS_READ(RTC_SECONDS);
	}

	spin_unlock_irq(&rtc_lock);

	if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
		BCD_TO_BIN(yr);
		BCD_TO_BIN(mo);
		BCD_TO_BIN(day);
		BCD_TO_BIN(hr);
		BCD_TO_BIN(min);
		BCD_TO_BIN(sec);
	}

	if (sec > 59) {
		min++;
		sec -= 60;
	}
	if (min > 59) {
		hr++;
		min -= 60;
	}
	if (hr > 23) {
		day++;
		hr -= 24;
	}
	if (day > 31) {
		mo++;
		day -= 31;
	}
	if (mo > 12) {
		yr++;
		mo -= 12;
	}
	if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
		BIN_TO_BCD(yr);
		BIN_TO_BCD(mo);
		BIN_TO_BCD(day);
		BIN_TO_BCD(hr);
		BIN_TO_BCD(min);
		BIN_TO_BCD(sec);
	}

	spin_lock_irq(&rtc_lock);
	/*
	 * Disable alarm interrupt before setting alarm timer or else
	 * when ACPI_EVENT_RTC is enabled, a spurious ACPI interrupt occurs
	 */
	rtc_control &= ~RTC_AIE;
	CMOS_WRITE(rtc_control, RTC_CONTROL);
	CMOS_READ(RTC_INTR_FLAGS);

	/* write the fields the rtc knows about */
	CMOS_WRITE(hr, RTC_HOURS_ALARM);
	CMOS_WRITE(min, RTC_MINUTES_ALARM);
	CMOS_WRITE(sec, RTC_SECONDS_ALARM);

	/*
	 * If the system supports an enhanced alarm it will have non-zero
	 * offsets into the CMOS RAM here -- which for some reason are pointing
	 * to the RTC area of memory.
	 */
	if (acpi_gbl_FADT->day_alrm)
		CMOS_WRITE(day, acpi_gbl_FADT->day_alrm);
	if (acpi_gbl_FADT->mon_alrm)
		CMOS_WRITE(mo, acpi_gbl_FADT->mon_alrm);
	if (acpi_gbl_FADT->century)
		CMOS_WRITE(yr / 100, acpi_gbl_FADT->century);
	/* enable the rtc alarm interrupt */
	rtc_control |= RTC_AIE;
	CMOS_WRITE(rtc_control, RTC_CONTROL);
	CMOS_READ(RTC_INTR_FLAGS);

	spin_unlock_irq(&rtc_lock);

	acpi_clear_event(ACPI_EVENT_RTC);
	acpi_enable_event(ACPI_EVENT_RTC, 0);

	*ppos += count;

	result = 0;
      end:
	return_VALUE(result ? result : count);
}

extern struct list_head acpi_wakeup_device_list;
extern spinlock_t acpi_device_lock;

static int
acpi_system_wakeup_device_seq_show(struct seq_file *seq, void *offset)
{
	struct list_head *node, *next;

	seq_printf(seq, "Device	Sleep state	Status\n");

	spin_lock(&acpi_device_lock);
	list_for_each_safe(node, next, &acpi_wakeup_device_list) {
		struct acpi_device *dev =
		    container_of(node, struct acpi_device, wakeup_list);

		if (!dev->wakeup.flags.valid)
			continue;
		spin_unlock(&acpi_device_lock);
		seq_printf(seq, "%4s	%4d		%s%8s\n",
			   dev->pnp.bus_id,
			   (u32) dev->wakeup.sleep_state,
			   dev->wakeup.flags.run_wake ? "*" : "",
			   dev->wakeup.state.enabled ? "enabled" : "disabled");
		spin_lock(&acpi_device_lock);
	}
	spin_unlock(&acpi_device_lock);
	return 0;
}

static ssize_t
acpi_system_write_wakeup_device(struct file *file,
				const char __user * buffer,
				size_t count, loff_t * ppos)
{
	struct list_head *node, *next;
	char strbuf[5];
	char str[5] = "";
	int len = count;
	struct acpi_device *found_dev = NULL;

	if (len > 4)
		len = 4;

	if (copy_from_user(strbuf, buffer, len))
		return -EFAULT;
	strbuf[len] = '\0';
	sscanf(strbuf, "%s", str);

	spin_lock(&acpi_device_lock);
	list_for_each_safe(node, next, &acpi_wakeup_device_list) {
		struct acpi_device *dev =
		    container_of(node, struct acpi_device, wakeup_list);
		if (!dev->wakeup.flags.valid)
			continue;

		if (!strncmp(dev->pnp.bus_id, str, 4)) {
			dev->wakeup.state.enabled =
			    dev->wakeup.state.enabled ? 0 : 1;
			found_dev = dev;
			break;
		}
	}
	if (found_dev) {
		list_for_each_safe(node, next, &acpi_wakeup_device_list) {
			struct acpi_device *dev = container_of(node,
							       struct
							       acpi_device,
							       wakeup_list);

			if ((dev != found_dev) &&
			    (dev->wakeup.gpe_number ==
			     found_dev->wakeup.gpe_number)
			    && (dev->wakeup.gpe_device ==
				found_dev->wakeup.gpe_device)) {
				printk(KERN_WARNING
				       "ACPI: '%s' and '%s' have the same GPE, "
				       "can't disable/enable one seperately\n",
				       dev->pnp.bus_id, found_dev->pnp.bus_id);
				dev->wakeup.state.enabled =
				    found_dev->wakeup.state.enabled;
			}
		}
	}
	spin_unlock(&acpi_device_lock);
	return count;
}

static int
acpi_system_wakeup_device_open_fs(struct inode *inode, struct file *file)
{
	return single_open(file, acpi_system_wakeup_device_seq_show,
			   PDE(inode)->data);
}

static struct file_operations acpi_system_wakeup_device_fops = {
	.open = acpi_system_wakeup_device_open_fs,
	.read = seq_read,
	.write = acpi_system_write_wakeup_device,
	.llseek = seq_lseek,
	.release = single_release,
};

#ifdef	CONFIG_ACPI_SLEEP_PROC_SLEEP
static struct file_operations acpi_system_sleep_fops = {
	.open = acpi_system_sleep_open_fs,
	.read = seq_read,
	.write = acpi_system_write_sleep,
	.llseek = seq_lseek,
	.release = single_release,
};
#endif				/* CONFIG_ACPI_SLEEP_PROC_SLEEP */

static struct file_operations acpi_system_alarm_fops = {
	.open = acpi_system_alarm_open_fs,
	.read = seq_read,
	.write = acpi_system_write_alarm,
	.llseek = seq_lseek,
	.release = single_release,
};

static u32 rtc_handler(void *context)
{
	acpi_clear_event(ACPI_EVENT_RTC);
	acpi_disable_event(ACPI_EVENT_RTC, 0);

	return ACPI_INTERRUPT_HANDLED;
}

static int acpi_sleep_proc_init(void)
{
	struct proc_dir_entry *entry = NULL;

	if (acpi_disabled)
		return 0;

#ifdef	CONFIG_ACPI_SLEEP_PROC_SLEEP
	/* 'sleep' [R/W] */
	entry =
	    create_proc_entry("sleep", S_IFREG | S_IRUGO | S_IWUSR,
			      acpi_root_dir);
	if (entry)
		entry->proc_fops = &acpi_system_sleep_fops;
#endif

	/* 'alarm' [R/W] */
	entry =
	    create_proc_entry("alarm", S_IFREG | S_IRUGO | S_IWUSR,
			      acpi_root_dir);
	if (entry)
		entry->proc_fops = &acpi_system_alarm_fops;

	/* 'wakeup device' [R/W] */
	entry =
	    create_proc_entry("wakeup", S_IFREG | S_IRUGO | S_IWUSR,
			      acpi_root_dir);
	if (entry)
		entry->proc_fops = &acpi_system_wakeup_device_fops;

	acpi_install_fixed_event_handler(ACPI_EVENT_RTC, rtc_handler, NULL);
	return 0;
}

late_initcall(acpi_sleep_proc_init);
Commit	Line	Data
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)
1da177e4 LT	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,
4be44fcd LB	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;
1da177e4 LT	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 +
4be44fcd LB	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;
1da177e4 LT	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,
4be44fcd LB	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);
4be44fcd LB	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 =
4be44fcd LB	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,
4be44fcd LB	363	(u32) dev->wakeup.sleep_state,
c65ade4d PM	364	dev->wakeup.flags.run_wake ? "*" : "",
c65ade4d PM	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;
1da177e4 LT	382
4be44fcd LB	383	if (len > 4)
4be44fcd LB	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 =
4be44fcd LB	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 =
4be44fcd LB	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
1da177e4 LT	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,
4be44fcd LB	434	PDE(inode)->data);
1da177e4 LT	435	}
	436
	437	static 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	};
1da177e4 LT	444
ebb6e1a6	445	#ifdef CONFIG_ACPI_SLEEP_PROC_SLEEP
1da177e4	446	static 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 LT	454
1da177e4 LT	455	static 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	};
1da177e4 LT	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)
1da177e4 LT	484	entry->proc_fops = &acpi_system_sleep_fops;
ebb6e1a6	485	#endif
1da177e4 LT	486
1da177e4 LT	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);