[GitHub/mt8127/android_kernel_alcatel_ttab.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, cent = 0;
	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_alarm)
		/* ACPI spec: only low 6 its should be cared */
		day = CMOS_READ(acpi_gbl_FADT.day_alarm) & 0x3F;
	else
		day = CMOS_READ(RTC_DAY_OF_MONTH);
	if (acpi_gbl_FADT.month_alarm)
		mo = CMOS_READ(acpi_gbl_FADT.month_alarm);
	else
		mo = CMOS_READ(RTC_MONTH);
	if (acpi_gbl_FADT.century)
		cent = CMOS_READ(acpi_gbl_FADT.century);

	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);
		BCD_TO_BIN(cent);
	}

	/* 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;
	else
		yr += cent * 100;

	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_alarm)
		CMOS_WRITE(day, acpi_gbl_FADT.day_alarm);
	if (acpi_gbl_FADT.month_alarm)
		CMOS_WRITE(mo, acpi_gbl_FADT.month_alarm);
	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 const 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 const 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 const 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	75	u32 sec, min, hr;
ad71860a	76	u32 day, mo, yr, cent = 0;
4be44fcd LB	77	unsigned char rtc_control = 0;
4be44fcd LB	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... */
ad71860a	90	if (acpi_gbl_FADT.day_alarm)
1da177e4	91	/* ACPI spec: only low 6 its should be cared */
ad71860a	92	day = CMOS_READ(acpi_gbl_FADT.day_alarm) & 0x3F;
1da177e4	93	else
4be44fcd	94	day = CMOS_READ(RTC_DAY_OF_MONTH);
ad71860a AS	95	if (acpi_gbl_FADT.month_alarm)
ad71860a AS	96	mo = CMOS_READ(acpi_gbl_FADT.month_alarm);
1da177e4 LT	97	else
1da177e4 LT	98	mo = CMOS_READ(RTC_MONTH);
ad71860a AS	99	if (acpi_gbl_FADT.century)
	100	cent = CMOS_READ(acpi_gbl_FADT.century);
	101
	102	yr = CMOS_READ(RTC_YEAR);
1da177e4 LT	103
	104	spin_unlock_irqrestore(&rtc_lock, flags);
	105
	106	if (!(rtc_control & RTC_DM_BINARY) \|\| RTC_ALWAYS_BCD) {
	107	BCD_TO_BIN(sec);
	108	BCD_TO_BIN(min);
	109	BCD_TO_BIN(hr);
	110	BCD_TO_BIN(day);
	111	BCD_TO_BIN(mo);
	112	BCD_TO_BIN(yr);
ad71860a	113	BCD_TO_BIN(cent);
1da177e4 LT	114	}
1da177e4 LT	115
4be44fcd	116	/* we're trusting the FADT (see above) */
ad71860a	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	136	yr += 2000;
ad71860a AS	137	else
ad71860a AS	138	yr += cent * 100;
1da177e4	139
4be44fcd LB	140	seq_printf(seq, "%4.4u-", yr);
	141	(mo > 12) ? seq_puts(seq, "**-") : seq_printf(seq, "%2.2u-", mo);
	142	(day > 31) ? seq_puts(seq, "** ") : seq_printf(seq, "%2.2u ", day);
	143	(hr > 23) ? seq_puts(seq, "**:") : seq_printf(seq, "%2.2u:", hr);
	144	(min > 59) ? seq_puts(seq, "**:") : seq_printf(seq, "%2.2u:", min);
1da177e4 LT	145	(sec > 59) ? seq_puts(seq, "**\n") : seq_printf(seq, "%2.2u\n", sec);
	146
	147	return 0;
	148	}
	149
	150	static int acpi_system_alarm_open_fs(struct inode inode, struct file file)
	151	{
	152	return single_open(file, acpi_system_alarm_seq_show, PDE(inode)->data);
	153	}
	154
4be44fcd	155	static int get_date_field(char *p, u32 value)
1da177e4	156	{
4be44fcd LB	157	char *next = NULL;
	158	char *string_end = NULL;
	159	int result = -EINVAL;
1da177e4 LT	160
	161	/*
	162	* Try to find delimeter, only to insert null. The end of the
	163	* string won't have one, but is still valid.
	164	*/
	165	next = strpbrk(*p, "- :");
	166	if (next)
	167	*next++ = '\0';
	168
	169	value = simple_strtoul(p, &string_end, 10);
	170
	171	/* Signal success if we got a good digit */
	172	if (string_end != *p)
	173	result = 0;
	174
	175	if (next)
	176	*p = next;
	177
	178	return result;
	179	}
	180
1da177e4	181	static ssize_t
4be44fcd LB	182	acpi_system_write_alarm(struct file *file,
4be44fcd LB	183	const char __user * buffer, size_t count, loff_t * ppos)
1da177e4	184	{
4be44fcd LB	185	int result = 0;
	186	char alarm_string[30] = { '\0' };
	187	char *p = alarm_string;
	188	u32 sec, min, hr, day, mo, yr;
	189	int adjust = 0;
	190	unsigned char rtc_control = 0;
1da177e4 LT	191
	192	ACPI_FUNCTION_TRACE("acpi_system_write_alarm");
	193
	194	if (count > sizeof(alarm_string) - 1)
	195	return_VALUE(-EINVAL);
4be44fcd	196
1da177e4 LT	197	if (copy_from_user(alarm_string, buffer, count))
	198	return_VALUE(-EFAULT);
	199
	200	alarm_string[count] = '\0';
	201
	202	/* check for time adjustment */
	203	if (alarm_string[0] == '+') {
	204	p++;
	205	adjust = 1;
	206	}
	207
	208	if ((result = get_date_field(&p, &yr)))
	209	goto end;
	210	if ((result = get_date_field(&p, &mo)))
	211	goto end;
	212	if ((result = get_date_field(&p, &day)))
	213	goto end;
	214	if ((result = get_date_field(&p, &hr)))
	215	goto end;
	216	if ((result = get_date_field(&p, &min)))
	217	goto end;
	218	if ((result = get_date_field(&p, &sec)))
	219	goto end;
	220
	221	if (sec > 59) {
	222	min += 1;
	223	sec -= 60;
	224	}
	225	if (min > 59) {
	226	hr += 1;
	227	min -= 60;
	228	}
	229	if (hr > 23) {
	230	day += 1;
	231	hr -= 24;
	232	}
	233	if (day > 31) {
	234	mo += 1;
	235	day -= 31;
	236	}
	237	if (mo > 12) {
	238	yr += 1;
	239	mo -= 12;
	240	}
	241
	242	spin_lock_irq(&rtc_lock);
	243
	244	rtc_control = CMOS_READ(RTC_CONTROL);
	245	if (!(rtc_control & RTC_DM_BINARY) \|\| RTC_ALWAYS_BCD) {
	246	BIN_TO_BCD(yr);
	247	BIN_TO_BCD(mo);
	248	BIN_TO_BCD(day);
	249	BIN_TO_BCD(hr);
	250	BIN_TO_BCD(min);
	251	BIN_TO_BCD(sec);
	252	}
	253
	254	if (adjust) {
4be44fcd LB	255	yr += CMOS_READ(RTC_YEAR);
4be44fcd LB	256	mo += CMOS_READ(RTC_MONTH);
1da177e4	257	day += CMOS_READ(RTC_DAY_OF_MONTH);
4be44fcd	258	hr += CMOS_READ(RTC_HOURS);
1da177e4 LT	259	min += CMOS_READ(RTC_MINUTES);
	260	sec += CMOS_READ(RTC_SECONDS);
	261	}
	262
	263	spin_unlock_irq(&rtc_lock);
	264
	265	if (!(rtc_control & RTC_DM_BINARY) \|\| RTC_ALWAYS_BCD) {
	266	BCD_TO_BIN(yr);
	267	BCD_TO_BIN(mo);
	268	BCD_TO_BIN(day);
	269	BCD_TO_BIN(hr);
	270	BCD_TO_BIN(min);
	271	BCD_TO_BIN(sec);
	272	}
	273
	274	if (sec > 59) {
	275	min++;
	276	sec -= 60;
	277	}
	278	if (min > 59) {
	279	hr++;
	280	min -= 60;
	281	}
	282	if (hr > 23) {
	283	day++;
	284	hr -= 24;
	285	}
	286	if (day > 31) {
	287	mo++;
	288	day -= 31;
	289	}
	290	if (mo > 12) {
	291	yr++;
	292	mo -= 12;
	293	}
	294	if (!(rtc_control & RTC_DM_BINARY) \|\| RTC_ALWAYS_BCD) {
	295	BIN_TO_BCD(yr);
	296	BIN_TO_BCD(mo);
	297	BIN_TO_BCD(day);
	298	BIN_TO_BCD(hr);
	299	BIN_TO_BCD(min);
	300	BIN_TO_BCD(sec);
	301	}
	302
	303	spin_lock_irq(&rtc_lock);
	304	/*
	305	* Disable alarm interrupt before setting alarm timer or else
	306	* when ACPI_EVENT_RTC is enabled, a spurious ACPI interrupt occurs
	307	*/
	308	rtc_control &= ~RTC_AIE;
	309	CMOS_WRITE(rtc_control, RTC_CONTROL);
	310	CMOS_READ(RTC_INTR_FLAGS);
	311
	312	/* write the fields the rtc knows about */
	313	CMOS_WRITE(hr, RTC_HOURS_ALARM);
	314	CMOS_WRITE(min, RTC_MINUTES_ALARM);
	315	CMOS_WRITE(sec, RTC_SECONDS_ALARM);
	316
	317	/*
	318	* If the system supports an enhanced alarm it will have non-zero
	319	* offsets into the CMOS RAM here -- which for some reason are pointing
	320	* to the RTC area of memory.
	321	*/
ad71860a AS	322	if (acpi_gbl_FADT.day_alarm)
	323	CMOS_WRITE(day, acpi_gbl_FADT.day_alarm);
	324	if (acpi_gbl_FADT.month_alarm)
	325	CMOS_WRITE(mo, acpi_gbl_FADT.month_alarm);
	326	if (acpi_gbl_FADT.century)
	327	CMOS_WRITE(yr / 100, acpi_gbl_FADT.century);
1da177e4 LT	328	/* enable the rtc alarm interrupt */
	329	rtc_control \|= RTC_AIE;
	330	CMOS_WRITE(rtc_control, RTC_CONTROL);
	331	CMOS_READ(RTC_INTR_FLAGS);
	332
	333	spin_unlock_irq(&rtc_lock);
	334
	335	acpi_clear_event(ACPI_EVENT_RTC);
	336	acpi_enable_event(ACPI_EVENT_RTC, 0);
	337
	338	*ppos += count;
	339
	340	result = 0;
4be44fcd	341	end:
1da177e4 LT	342	return_VALUE(result ? result : count);
	343	}
	344
4be44fcd	345	extern struct list_head acpi_wakeup_device_list;
1da177e4 LT	346	extern spinlock_t acpi_device_lock;
	347
	348	static int
	349	acpi_system_wakeup_device_seq_show(struct seq_file seq, void offset)
	350	{
4be44fcd	351	struct list_head node, next;
1da177e4 LT	352
	353	seq_printf(seq, "Device Sleep state Status\n");
	354
	355	spin_lock(&acpi_device_lock);
	356	list_for_each_safe(node, next, &acpi_wakeup_device_list) {
4be44fcd LB	357	struct acpi_device *dev =
4be44fcd LB	358	container_of(node, struct acpi_device, wakeup_list);
1da177e4 LT	359
	360	if (!dev->wakeup.flags.valid)
	361	continue;
	362	spin_unlock(&acpi_device_lock);
c65ade4d	363	seq_printf(seq, "%4s %4d %s%8s\n",
4be44fcd LB	364	dev->pnp.bus_id,
4be44fcd LB	365	(u32) dev->wakeup.sleep_state,
c65ade4d PM	366	dev->wakeup.flags.run_wake ? "*" : "",
c65ade4d PM	367	dev->wakeup.state.enabled ? "enabled" : "disabled");
1da177e4 LT	368	spin_lock(&acpi_device_lock);
	369	}
	370	spin_unlock(&acpi_device_lock);
	371	return 0;
	372	}
	373
	374	static ssize_t
4be44fcd LB	375	acpi_system_write_wakeup_device(struct file *file,
	376	const char __user * buffer,
	377	size_t count, loff_t * ppos)
1da177e4	378	{
4be44fcd LB	379	struct list_head node, next;
	380	char strbuf[5];
	381	char str[5] = "";
	382	int len = count;
1da177e4 LT	383	struct acpi_device *found_dev = NULL;
1da177e4 LT	384
4be44fcd LB	385	if (len > 4)
4be44fcd LB	386	len = 4;
1da177e4 LT	387
	388	if (copy_from_user(strbuf, buffer, len))
	389	return -EFAULT;
	390	strbuf[len] = '\0';
	391	sscanf(strbuf, "%s", str);
	392
	393	spin_lock(&acpi_device_lock);
	394	list_for_each_safe(node, next, &acpi_wakeup_device_list) {
4be44fcd LB	395	struct acpi_device *dev =
4be44fcd LB	396	container_of(node, struct acpi_device, wakeup_list);
1da177e4 LT	397	if (!dev->wakeup.flags.valid)
	398	continue;
	399
	400	if (!strncmp(dev->pnp.bus_id, str, 4)) {
4be44fcd LB	401	dev->wakeup.state.enabled =
4be44fcd LB	402	dev->wakeup.state.enabled ? 0 : 1;
1da177e4 LT	403	found_dev = dev;
	404	break;
	405	}
	406	}
	407	if (found_dev) {
	408	list_for_each_safe(node, next, &acpi_wakeup_device_list) {
4be44fcd LB	409	struct acpi_device *dev = container_of(node,
	410	struct
	411	acpi_device,
	412	wakeup_list);
1da177e4 LT	413
1da177e4 LT	414	if ((dev != found_dev) &&
4be44fcd LB	415	(dev->wakeup.gpe_number ==
	416	found_dev->wakeup.gpe_number)
	417	&& (dev->wakeup.gpe_device ==
	418	found_dev->wakeup.gpe_device)) {
	419	printk(KERN_WARNING
	420	"ACPI: '%s' and '%s' have the same GPE, "
	421	"can't disable/enable one seperately\n",
	422	dev->pnp.bus_id, found_dev->pnp.bus_id);
	423	dev->wakeup.state.enabled =
	424	found_dev->wakeup.state.enabled;
1da177e4 LT	425	}
	426	}
	427	}
	428	spin_unlock(&acpi_device_lock);
	429	return count;
	430	}
	431
	432	static int
	433	acpi_system_wakeup_device_open_fs(struct inode inode, struct file file)
	434	{
4be44fcd LB	435	return single_open(file, acpi_system_wakeup_device_seq_show,
4be44fcd LB	436	PDE(inode)->data);
1da177e4 LT	437	}
1da177e4 LT	438
d7508032	439	static const struct file_operations acpi_system_wakeup_device_fops = {
4be44fcd LB	440	.open = acpi_system_wakeup_device_open_fs,
	441	.read = seq_read,
	442	.write = acpi_system_write_wakeup_device,
	443	.llseek = seq_lseek,
	444	.release = single_release,
1da177e4 LT	445	};
1da177e4 LT	446
ebb6e1a6	447	#ifdef CONFIG_ACPI_SLEEP_PROC_SLEEP
d7508032	448	static const struct file_operations acpi_system_sleep_fops = {
4be44fcd LB	449	.open = acpi_system_sleep_open_fs,
	450	.read = seq_read,
	451	.write = acpi_system_write_sleep,
	452	.llseek = seq_lseek,
	453	.release = single_release,
1da177e4	454	};
4be44fcd	455	#endif /* CONFIG_ACPI_SLEEP_PROC_SLEEP */
1da177e4	456
d7508032	457	static const struct file_operations acpi_system_alarm_fops = {
4be44fcd LB	458	.open = acpi_system_alarm_open_fs,
	459	.read = seq_read,
	460	.write = acpi_system_write_alarm,
	461	.llseek = seq_lseek,
	462	.release = single_release,
1da177e4 LT	463	};
1da177e4 LT	464
4be44fcd	465	static u32 rtc_handler(void *context)
1da177e4 LT	466	{
	467	acpi_clear_event(ACPI_EVENT_RTC);
	468	acpi_disable_event(ACPI_EVENT_RTC, 0);
	469
	470	return ACPI_INTERRUPT_HANDLED;
	471	}
	472
	473	static int acpi_sleep_proc_init(void)
	474	{
c65ade4d	475	struct proc_dir_entry *entry = NULL;
1da177e4 LT	476
	477	if (acpi_disabled)
	478	return 0;
4be44fcd	479
ebb6e1a6	480	#ifdef CONFIG_ACPI_SLEEP_PROC_SLEEP
c65ade4d	481	/* 'sleep' [R/W] */
4be44fcd LB	482	entry =
	483	create_proc_entry("sleep", S_IFREG \| S_IRUGO \| S_IWUSR,
	484	acpi_root_dir);
1da177e4 LT	485	if (entry)
1da177e4 LT	486	entry->proc_fops = &acpi_system_sleep_fops;
ebb6e1a6	487	#endif
1da177e4 LT	488
1da177e4 LT	489	/* 'alarm' [R/W] */
4be44fcd LB	490	entry =
	491	create_proc_entry("alarm", S_IFREG \| S_IRUGO \| S_IWUSR,
	492	acpi_root_dir);
1da177e4 LT	493	if (entry)
	494	entry->proc_fops = &acpi_system_alarm_fops;
	495
c65ade4d	496	/* 'wakeup device' [R/W] */
4be44fcd LB	497	entry =
	498	create_proc_entry("wakeup", S_IFREG \| S_IRUGO \| S_IWUSR,
	499	acpi_root_dir);
1da177e4 LT	500	if (entry)
	501	entry->proc_fops = &acpi_system_wakeup_device_fops;
	502
	503	acpi_install_fixed_event_handler(ACPI_EVENT_RTC, rtc_handler, NULL);
	504	return 0;
	505	}
	506
	507	late_initcall(acpi_sleep_proc_init);