[deliverable/linux.git] / drivers / acpi / proc.c

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

#include "sleep.h"
#include "internal.h"

#define _COMPONENT		ACPI_SYSTEM_COMPONENT

/*
 * this file provides support for:
 * /proc/acpi/wakeup
 */

ACPI_MODULE_NAME("sleep")

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

	seq_printf(seq, "Device\tS-state\t  Status   Sysfs node\n");

	mutex_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);
		struct acpi_device_physical_node *entry;

		if (!dev->wakeup.flags.valid)
			continue;

		seq_printf(seq, "%s\t  S%d\t",
			   dev->pnp.bus_id,
			   (u32) dev->wakeup.sleep_state);

		mutex_lock(&dev->physical_node_lock);

		if (!dev->physical_node_count) {
			seq_printf(seq, "%c%-8s\n",
				dev->wakeup.flags.run_wake ? '*' : ' ',
				device_may_wakeup(&dev->dev) ?
					"enabled" : "disabled");
		} else {
			struct device *ldev;
			list_for_each_entry(entry, &dev->physical_node_list,
					node) {
				ldev = get_device(entry->dev);
				if (!ldev)
					continue;

				if (&entry->node !=
						dev->physical_node_list.next)
					seq_printf(seq, "\t\t");

				seq_printf(seq, "%c%-8s  %s:%s\n",
					dev->wakeup.flags.run_wake ? '*' : ' ',
					(device_may_wakeup(&dev->dev) ||
					device_may_wakeup(ldev)) ?
					"enabled" : "disabled",
					ldev->bus ? ldev->bus->name :
					"no-bus", dev_name(ldev));
				put_device(ldev);
			}
		}

		mutex_unlock(&dev->physical_node_lock);
	}
	mutex_unlock(&acpi_device_lock);
	return 0;
}

static void physical_device_enable_wakeup(struct acpi_device *adev)
{
	struct acpi_device_physical_node *entry;

	mutex_lock(&adev->physical_node_lock);

	list_for_each_entry(entry,
		&adev->physical_node_list, node)
		if (entry->dev && device_can_wakeup(entry->dev)) {
			bool enable = !device_may_wakeup(entry->dev);
			device_set_wakeup_enable(entry->dev, enable);
		}

	mutex_unlock(&adev->physical_node_lock);
}

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] = "";

	if (count > 4)
		count = 4;

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

	mutex_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)) {
			if (device_can_wakeup(&dev->dev)) {
				bool enable = !device_may_wakeup(&dev->dev);
				device_set_wakeup_enable(&dev->dev, enable);
			} else {
				physical_device_enable_wakeup(dev);
			}
			break;
		}
	}
	mutex_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_DATA(inode));
}

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

void __init acpi_sleep_proc_init(void)
{
	/* 'wakeup device' [R/W] */
	proc_create("wakeup", S_IFREG | S_IRUGO | S_IWUSR,
		    acpi_root_dir, &acpi_system_wakeup_device_fops);
}
Commit	Line	Data
	1	#include <linux/proc_fs.h>
	2	#include <linux/seq_file.h>
	3	#include <linux/export.h>
	4	#include <linux/suspend.h>
	5	#include <linux/bcd.h>
	6	#include <linux/acpi.h>
	7	#include <asm/uaccess.h>
	8
	9	#include "sleep.h"
	10	#include "internal.h"
	11
	12	#define _COMPONENT ACPI_SYSTEM_COMPONENT
	13
	14	/*
	15	* this file provides support for:
	16	* /proc/acpi/wakeup
	17	*/
	18
	19	ACPI_MODULE_NAME("sleep")
	20
	21	static int
	22	acpi_system_wakeup_device_seq_show(struct seq_file seq, void offset)
	23	{
	24	struct list_head node, next;
	25
	26	seq_printf(seq, "Device\tS-state\t Status Sysfs node\n");
	27
	28	mutex_lock(&acpi_device_lock);
	29	list_for_each_safe(node, next, &acpi_wakeup_device_list) {
	30	struct acpi_device *dev =
	31	container_of(node, struct acpi_device, wakeup_list);
	32	struct acpi_device_physical_node *entry;
	33
	34	if (!dev->wakeup.flags.valid)
	35	continue;
	36
	37	seq_printf(seq, "%s\t S%d\t",
	38	dev->pnp.bus_id,
	39	(u32) dev->wakeup.sleep_state);
	40
	41	mutex_lock(&dev->physical_node_lock);
	42
	43	if (!dev->physical_node_count) {
	44	seq_printf(seq, "%c%-8s\n",
	45	dev->wakeup.flags.run_wake ? '*' : ' ',
	46	device_may_wakeup(&dev->dev) ?
	47	"enabled" : "disabled");
	48	} else {
	49	struct device *ldev;
	50	list_for_each_entry(entry, &dev->physical_node_list,
	51	node) {
	52	ldev = get_device(entry->dev);
	53	if (!ldev)
	54	continue;
	55
	56	if (&entry->node !=
	57	dev->physical_node_list.next)
	58	seq_printf(seq, "\t\t");
	59
	60	seq_printf(seq, "%c%-8s %s:%s\n",
	61	dev->wakeup.flags.run_wake ? '*' : ' ',
	62	(device_may_wakeup(&dev->dev) \|\|
	63	device_may_wakeup(ldev)) ?
	64	"enabled" : "disabled",
	65	ldev->bus ? ldev->bus->name :
	66	"no-bus", dev_name(ldev));
	67	put_device(ldev);
	68	}
	69	}
	70
	71	mutex_unlock(&dev->physical_node_lock);
	72	}
	73	mutex_unlock(&acpi_device_lock);
	74	return 0;
	75	}
	76
	77	static void physical_device_enable_wakeup(struct acpi_device *adev)
	78	{
	79	struct acpi_device_physical_node *entry;
	80
	81	mutex_lock(&adev->physical_node_lock);
	82
	83	list_for_each_entry(entry,
	84	&adev->physical_node_list, node)
	85	if (entry->dev && device_can_wakeup(entry->dev)) {
	86	bool enable = !device_may_wakeup(entry->dev);
	87	device_set_wakeup_enable(entry->dev, enable);
	88	}
	89
	90	mutex_unlock(&adev->physical_node_lock);
	91	}
	92
	93	static ssize_t
	94	acpi_system_write_wakeup_device(struct file *file,
	95	const char __user * buffer,
	96	size_t count, loff_t * ppos)
	97	{
	98	struct list_head node, next;
	99	char strbuf[5];
	100	char str[5] = "";
	101
	102	if (count > 4)
	103	count = 4;
	104
	105	if (copy_from_user(strbuf, buffer, count))
	106	return -EFAULT;
	107	strbuf[count] = '\0';
	108	sscanf(strbuf, "%s", str);
	109
	110	mutex_lock(&acpi_device_lock);
	111	list_for_each_safe(node, next, &acpi_wakeup_device_list) {
	112	struct acpi_device *dev =
	113	container_of(node, struct acpi_device, wakeup_list);
	114	if (!dev->wakeup.flags.valid)
	115	continue;
	116
	117	if (!strncmp(dev->pnp.bus_id, str, 4)) {
	118	if (device_can_wakeup(&dev->dev)) {
	119	bool enable = !device_may_wakeup(&dev->dev);
	120	device_set_wakeup_enable(&dev->dev, enable);
	121	} else {
	122	physical_device_enable_wakeup(dev);
	123	}
	124	break;
	125	}
	126	}
	127	mutex_unlock(&acpi_device_lock);
	128	return count;
	129	}
	130
	131	static int
	132	acpi_system_wakeup_device_open_fs(struct inode inode, struct file file)
	133	{
	134	return single_open(file, acpi_system_wakeup_device_seq_show,
	135	PDE_DATA(inode));
	136	}
	137
	138	static const struct file_operations acpi_system_wakeup_device_fops = {
	139	.owner = THIS_MODULE,
	140	.open = acpi_system_wakeup_device_open_fs,
	141	.read = seq_read,
	142	.write = acpi_system_write_wakeup_device,
	143	.llseek = seq_lseek,
	144	.release = single_release,
	145	};
	146
	147	void __init acpi_sleep_proc_init(void)
	148	{
	149	/* 'wakeup device' [R/W] */
	150	proc_create("wakeup", S_IFREG \| S_IRUGO \| S_IWUSR,
	151	acpi_root_dir, &acpi_system_wakeup_device_fops);
	152	}