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

/*
 * container.c  - ACPI Generic Container Driver
 *
 * Copyright (C) 2004 Anil S Keshavamurthy (anil.s.keshavamurthy@intel.com)
 * Copyright (C) 2004 Keiichiro Tokunaga (tokunaga.keiich@jp.fujitsu.com)
 * Copyright (C) 2004 Motoyuki Ito (motoyuki@soft.fujitsu.com)
 * Copyright (C) 2004 FUJITSU LIMITED
 * Copyright (C) 2004, 2013 Intel Corp.
 * Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or (at
 *  your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful, but
 *  WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  General Public License for more details.
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 */
#include <linux/acpi.h>
#include <linux/container.h>

#include "internal.h"

#define _COMPONENT			ACPI_CONTAINER_COMPONENT
ACPI_MODULE_NAME("container");

static const struct acpi_device_id container_device_ids[] = {
	{"ACPI0004", 0},
	{"PNP0A05", 0},
	{"PNP0A06", 0},
	{"", 0},
};

#ifdef CONFIG_ACPI_CONTAINER

static int acpi_container_offline(struct container_dev *cdev)
{
	struct acpi_device *adev = ACPI_COMPANION(&cdev->dev);
	struct acpi_device *child;

	/* Check all of the dependent devices' physical companions. */
	list_for_each_entry(child, &adev->children, node)
		if (!acpi_scan_is_offline(child, false))
			return -EBUSY;

	return 0;
}

static void acpi_container_release(struct device *dev)
{
	kfree(to_container_dev(dev));
}

static int container_device_attach(struct acpi_device *adev,
				   const struct acpi_device_id *not_used)
{
	struct container_dev *cdev;
	struct device *dev;
	int ret;

	if (adev->flags.is_dock_station)
		return 0;

	cdev = kzalloc(sizeof(*cdev), GFP_KERNEL);
	if (!cdev)
		return -ENOMEM;

	cdev->offline = acpi_container_offline;
	dev = &cdev->dev;
	dev->bus = &container_subsys;
	dev_set_name(dev, "%s", dev_name(&adev->dev));
	ACPI_COMPANION_SET(dev, adev);
	dev->release = acpi_container_release;
	ret = device_register(dev);
	if (ret) {
		put_device(dev);
		return ret;
	}
	adev->driver_data = dev;
	return 1;
}

static void container_device_detach(struct acpi_device *adev)
{
	struct device *dev = acpi_driver_data(adev);

	adev->driver_data = NULL;
	if (dev)
		device_unregister(dev);
}

static void container_device_online(struct acpi_device *adev)
{
	struct device *dev = acpi_driver_data(adev);

	kobject_uevent(&dev->kobj, KOBJ_ONLINE);
}

static struct acpi_scan_handler container_handler = {
	.ids = container_device_ids,
	.attach = container_device_attach,
	.detach = container_device_detach,
	.hotplug = {
		.enabled = true,
		.demand_offline = true,
		.notify_online = container_device_online,
	},
};

void __init acpi_container_init(void)
{
	acpi_scan_add_handler(&container_handler);
}

#else

static struct acpi_scan_handler container_handler = {
	.ids = container_device_ids,
};

void __init acpi_container_init(void)
{
	acpi_scan_add_handler_with_hotplug(&container_handler, "container");
}

#endif /* CONFIG_ACPI_CONTAINER */
Commit	Line	Data
1da177e4	1	/*
68a67f6c	2	* container.c - ACPI Generic Container Driver
1da177e4 LT	3	*
	4	* Copyright (C) 2004 Anil S Keshavamurthy (anil.s.keshavamurthy@intel.com)
	5	* Copyright (C) 2004 Keiichiro Tokunaga (tokunaga.keiich@jp.fujitsu.com)
	6	* Copyright (C) 2004 Motoyuki Ito (motoyuki@soft.fujitsu.com)
1da177e4	7	* Copyright (C) 2004 FUJITSU LIMITED
68a67f6c RW	8	* Copyright (C) 2004, 2013 Intel Corp.
68a67f6c RW	9	* Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
1da177e4 LT	10	*
	11	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	12	*
	13	* This program is free software; you can redistribute it and/or modify
	14	* it under the terms of the GNU General Public License as published by
	15	* the Free Software Foundation; either version 2 of the License, or (at
	16	* your option) any later version.
	17	*
	18	* This program is distributed in the hope that it will be useful, but
	19	* WITHOUT ANY WARRANTY; without even the implied warranty of
	20	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	21	* General Public License for more details.
	22	*
1da177e4 LT	23	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1da177e4 LT	24	*/
1da177e4	25	#include <linux/acpi.h>
caa73ea1	26	#include <linux/container.h>
1da177e4	27
2f9b06fc AS	28	#include "internal.h"
2f9b06fc AS	29
1da177e4	30	#define _COMPONENT ACPI_CONTAINER_COMPONENT
f52fd66d	31	ACPI_MODULE_NAME("container");
1da177e4	32
1ba90e3a TR	33	static const struct acpi_device_id container_device_ids[] = {
	34	{"ACPI0004", 0},
	35	{"PNP0A05", 0},
	36	{"PNP0A06", 0},
	37	{"", 0},
	38	};
1ba90e3a	39
a1ec6572 RW	40	#ifdef CONFIG_ACPI_CONTAINER
a1ec6572 RW	41
caa73ea1 RW	42	static int acpi_container_offline(struct container_dev *cdev)
	43	{
	44	struct acpi_device *adev = ACPI_COMPANION(&cdev->dev);
	45	struct acpi_device *child;
	46
	47	/* Check all of the dependent devices' physical companions. */
	48	list_for_each_entry(child, &adev->children, node)
	49	if (!acpi_scan_is_offline(child, false))
	50	return -EBUSY;
	51
	52	return 0;
	53	}
	54
	55	static void acpi_container_release(struct device *dev)
	56	{
	57	kfree(to_container_dev(dev));
	58	}
	59
46394fd0	60	static int container_device_attach(struct acpi_device *adev,
737f1a9f RW	61	const struct acpi_device_id *not_used)
737f1a9f RW	62	{
caa73ea1 RW	63	struct container_dev *cdev;
	64	struct device *dev;
	65	int ret;
	66
1e2380cd RW	67	if (adev->flags.is_dock_station)
	68	return 0;
	69
caa73ea1 RW	70	cdev = kzalloc(sizeof(*cdev), GFP_KERNEL);
	71	if (!cdev)
	72	return -ENOMEM;
	73
	74	cdev->offline = acpi_container_offline;
	75	dev = &cdev->dev;
	76	dev->bus = &container_subsys;
	77	dev_set_name(dev, "%s", dev_name(&adev->dev));
	78	ACPI_COMPANION_SET(dev, adev);
	79	dev->release = acpi_container_release;
	80	ret = device_register(dev);
0f6aa09e RW	81	if (ret) {
0f6aa09e RW	82	put_device(dev);
caa73ea1	83	return ret;
0f6aa09e	84	}
caa73ea1	85	adev->driver_data = dev;
737f1a9f RW	86	return 1;
	87	}
	88
46394fd0 RW	89	static void container_device_detach(struct acpi_device *adev)
46394fd0 RW	90	{
caa73ea1 RW	91	struct device *dev = acpi_driver_data(adev);
	92
	93	adev->driver_data = NULL;
	94	if (dev)
	95	device_unregister(dev);
46394fd0 RW	96	}
46394fd0 RW	97
8ab17fc9 RW	98	static void container_device_online(struct acpi_device *adev)
	99	{
	100	struct device *dev = acpi_driver_data(adev);
	101
	102	kobject_uevent(&dev->kobj, KOBJ_ONLINE);
	103	}
	104
79917f34	105	static struct acpi_scan_handler container_handler = {
1ba90e3a	106	.ids = container_device_ids,
737f1a9f	107	.attach = container_device_attach,
46394fd0	108	.detach = container_device_detach,
68a67f6c RW	109	.hotplug = {
68a67f6c RW	110	.enabled = true,
caa73ea1	111	.demand_offline = true,
8ab17fc9	112	.notify_online = container_device_online,
68a67f6c	113	},
1da177e4 LT	114	};
1da177e4 LT	115
a1ec6572 RW	116	void __init acpi_container_init(void)
	117	{
	118	acpi_scan_add_handler(&container_handler);
	119	}
	120
	121	#else
	122
	123	static struct acpi_scan_handler container_handler = {
	124	.ids = container_device_ids,
	125	};
	126
737f1a9f	127	void __init acpi_container_init(void)
1da177e4	128	{
79917f34	129	acpi_scan_add_handler_with_hotplug(&container_handler, "container");
1da177e4	130	}
a1ec6572 RW	131
a1ec6572 RW	132	#endif /* CONFIG_ACPI_CONTAINER */