[linux-2.6-block.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.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 */
#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	*
	23	* You should have received a copy of the GNU General Public License along
	24	* with this program; if not, write to the Free Software Foundation, Inc.,
	25	* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
	26	*
	27	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	28	*/
1da177e4	29	#include <linux/acpi.h>
caa73ea1	30	#include <linux/container.h>
1da177e4	31
2f9b06fc AS	32	#include "internal.h"
2f9b06fc AS	33
1da177e4	34	#define _COMPONENT ACPI_CONTAINER_COMPONENT
f52fd66d	35	ACPI_MODULE_NAME("container");
1da177e4	36
1ba90e3a TR	37	static const struct acpi_device_id container_device_ids[] = {
	38	{"ACPI0004", 0},
	39	{"PNP0A05", 0},
	40	{"PNP0A06", 0},
	41	{"", 0},
	42	};
1ba90e3a	43
a1ec6572 RW	44	#ifdef CONFIG_ACPI_CONTAINER
a1ec6572 RW	45
caa73ea1 RW	46	static int acpi_container_offline(struct container_dev *cdev)
	47	{
	48	struct acpi_device *adev = ACPI_COMPANION(&cdev->dev);
	49	struct acpi_device *child;
	50
	51	/* Check all of the dependent devices' physical companions. */
	52	list_for_each_entry(child, &adev->children, node)
	53	if (!acpi_scan_is_offline(child, false))
	54	return -EBUSY;
	55
	56	return 0;
	57	}
	58
	59	static void acpi_container_release(struct device *dev)
	60	{
	61	kfree(to_container_dev(dev));
	62	}
	63
46394fd0	64	static int container_device_attach(struct acpi_device *adev,
737f1a9f RW	65	const struct acpi_device_id *not_used)
737f1a9f RW	66	{
caa73ea1 RW	67	struct container_dev *cdev;
	68	struct device *dev;
	69	int ret;
	70
1e2380cd RW	71	if (adev->flags.is_dock_station)
	72	return 0;
	73
caa73ea1 RW	74	cdev = kzalloc(sizeof(*cdev), GFP_KERNEL);
	75	if (!cdev)
	76	return -ENOMEM;
	77
	78	cdev->offline = acpi_container_offline;
	79	dev = &cdev->dev;
	80	dev->bus = &container_subsys;
	81	dev_set_name(dev, "%s", dev_name(&adev->dev));
	82	ACPI_COMPANION_SET(dev, adev);
	83	dev->release = acpi_container_release;
	84	ret = device_register(dev);
0f6aa09e RW	85	if (ret) {
0f6aa09e RW	86	put_device(dev);
caa73ea1	87	return ret;
0f6aa09e	88	}
caa73ea1	89	adev->driver_data = dev;
737f1a9f RW	90	return 1;
	91	}
	92
46394fd0 RW	93	static void container_device_detach(struct acpi_device *adev)
46394fd0 RW	94	{
caa73ea1 RW	95	struct device *dev = acpi_driver_data(adev);
	96
	97	adev->driver_data = NULL;
	98	if (dev)
	99	device_unregister(dev);
46394fd0 RW	100	}
46394fd0 RW	101
8ab17fc9 RW	102	static void container_device_online(struct acpi_device *adev)
	103	{
	104	struct device *dev = acpi_driver_data(adev);
	105
	106	kobject_uevent(&dev->kobj, KOBJ_ONLINE);
	107	}
	108
79917f34	109	static struct acpi_scan_handler container_handler = {
1ba90e3a	110	.ids = container_device_ids,
737f1a9f	111	.attach = container_device_attach,
46394fd0	112	.detach = container_device_detach,
68a67f6c RW	113	.hotplug = {
68a67f6c RW	114	.enabled = true,
caa73ea1	115	.demand_offline = true,
8ab17fc9	116	.notify_online = container_device_online,
68a67f6c	117	},
1da177e4 LT	118	};
1da177e4 LT	119
a1ec6572 RW	120	void __init acpi_container_init(void)
	121	{
	122	acpi_scan_add_handler(&container_handler);
	123	}
	124
	125	#else
	126
	127	static struct acpi_scan_handler container_handler = {
	128	.ids = container_device_ids,
	129	};
	130
737f1a9f	131	void __init acpi_container_init(void)
1da177e4	132	{
79917f34	133	acpi_scan_add_handler_with_hotplug(&container_handler, "container");
1da177e4	134	}
a1ec6572 RW	135
a1ec6572 RW	136	#endif /* CONFIG_ACPI_CONTAINER */