[mirror_ubuntu-artful-kernel.git] / drivers / pnp / pnpacpi / core.c

/*
 * pnpacpi -- PnP ACPI driver
 *
 * Copyright (c) 2004 Matthieu Castet <castet.matthieu@free.fr>
 * Copyright (c) 2004 Li Shaohua <shaohua.li@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, 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/export.h>
#include <linux/acpi.h>
#include <linux/pnp.h>
#include <linux/slab.h>
#include <linux/mod_devicetable.h>

#include "../base.h"
#include "pnpacpi.h"

static int num;

/*
 * Compatible Device IDs
 */
#define TEST_HEX(c) \
	if (!(('0' <= (c) && (c) <= '9') || ('A' <= (c) && (c) <= 'F'))) \
		return 0
#define TEST_ALPHA(c) \
	if (!('A' <= (c) && (c) <= 'Z')) \
		return 0
static int __init ispnpidacpi(const char *id)
{
	TEST_ALPHA(id[0]);
	TEST_ALPHA(id[1]);
	TEST_ALPHA(id[2]);
	TEST_HEX(id[3]);
	TEST_HEX(id[4]);
	TEST_HEX(id[5]);
	TEST_HEX(id[6]);
	if (id[7] != '\0')
		return 0;
	return 1;
}

static int pnpacpi_get_resources(struct pnp_dev *dev)
{
	pnp_dbg(&dev->dev, "get resources\n");
	return pnpacpi_parse_allocated_resource(dev);
}

static int pnpacpi_set_resources(struct pnp_dev *dev)
{
	struct acpi_device *acpi_dev;
	acpi_handle handle;
	int ret = 0;

	pnp_dbg(&dev->dev, "set resources\n");

	handle = ACPI_HANDLE(&dev->dev);
	if (!handle || acpi_bus_get_device(handle, &acpi_dev)) {
		dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__);
		return -ENODEV;
	}

	if (WARN_ON_ONCE(acpi_dev != dev->data))
		dev->data = acpi_dev;

	if (acpi_has_method(handle, METHOD_NAME__SRS)) {
		struct acpi_buffer buffer;

		ret = pnpacpi_build_resource_template(dev, &buffer);
		if (ret)
			return ret;

		ret = pnpacpi_encode_resources(dev, &buffer);
		if (!ret) {
			acpi_status status;

			status = acpi_set_current_resources(handle, &buffer);
			if (ACPI_FAILURE(status))
				ret = -EIO;
		}
		kfree(buffer.pointer);
	}
	if (!ret && acpi_bus_power_manageable(handle))
		ret = acpi_bus_set_power(handle, ACPI_STATE_D0);

	return ret;
}

static int pnpacpi_disable_resources(struct pnp_dev *dev)
{
	struct acpi_device *acpi_dev;
	acpi_handle handle;
	acpi_status status;

	dev_dbg(&dev->dev, "disable resources\n");

	handle = ACPI_HANDLE(&dev->dev);
	if (!handle || acpi_bus_get_device(handle, &acpi_dev)) {
		dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__);
		return 0;
	}

	/* acpi_unregister_gsi(pnp_irq(dev, 0)); */
	if (acpi_bus_power_manageable(handle))
		acpi_bus_set_power(handle, ACPI_STATE_D3_COLD);

	/* continue even if acpi_bus_set_power() fails */
	status = acpi_evaluate_object(handle, "_DIS", NULL, NULL);
	if (ACPI_FAILURE(status) && status != AE_NOT_FOUND)
		return -ENODEV;

	return 0;
}

#ifdef CONFIG_ACPI_SLEEP
static bool pnpacpi_can_wakeup(struct pnp_dev *dev)
{
	struct acpi_device *acpi_dev;
	acpi_handle handle;

	handle = ACPI_HANDLE(&dev->dev);
	if (!handle || acpi_bus_get_device(handle, &acpi_dev)) {
		dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__);
		return false;
	}

	return acpi_bus_can_wakeup(handle);
}

static int pnpacpi_suspend(struct pnp_dev *dev, pm_message_t state)
{
	struct acpi_device *acpi_dev;
	acpi_handle handle;
	int error = 0;

	handle = ACPI_HANDLE(&dev->dev);
	if (!handle || acpi_bus_get_device(handle, &acpi_dev)) {
		dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__);
		return 0;
	}

	if (device_can_wakeup(&dev->dev)) {
		error = acpi_pm_device_sleep_wake(&dev->dev,
				device_may_wakeup(&dev->dev));
		if (error)
			return error;
	}

	if (acpi_bus_power_manageable(handle)) {
		int power_state = acpi_pm_device_sleep_state(&dev->dev, NULL,
							ACPI_STATE_D3_COLD);
		if (power_state < 0)
			power_state = (state.event == PM_EVENT_ON) ?
					ACPI_STATE_D0 : ACPI_STATE_D3_COLD;

		/*
		 * acpi_bus_set_power() often fails (keyboard port can't be
		 * powered-down?), and in any case, our return value is ignored
		 * by pnp_bus_suspend().  Hence we don't revert the wakeup
		 * setting if the set_power fails.
		 */
		error = acpi_bus_set_power(handle, power_state);
	}

	return error;
}

static int pnpacpi_resume(struct pnp_dev *dev)
{
	struct acpi_device *acpi_dev;
	acpi_handle handle = ACPI_HANDLE(&dev->dev);
	int error = 0;

	if (!handle || acpi_bus_get_device(handle, &acpi_dev)) {
		dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__);
		return -ENODEV;
	}

	if (device_may_wakeup(&dev->dev))
		acpi_pm_device_sleep_wake(&dev->dev, false);

	if (acpi_bus_power_manageable(handle))
		error = acpi_bus_set_power(handle, ACPI_STATE_D0);

	return error;
}
#endif

struct pnp_protocol pnpacpi_protocol = {
	.name	 = "Plug and Play ACPI",
	.get	 = pnpacpi_get_resources,
	.set	 = pnpacpi_set_resources,
	.disable = pnpacpi_disable_resources,
#ifdef CONFIG_ACPI_SLEEP
	.can_wakeup = pnpacpi_can_wakeup,
	.suspend = pnpacpi_suspend,
	.resume = pnpacpi_resume,
#endif
};
EXPORT_SYMBOL(pnpacpi_protocol);

static char *__init pnpacpi_get_id(struct acpi_device *device)
{
	struct acpi_hardware_id *id;

	list_for_each_entry(id, &device->pnp.ids, list) {
		if (ispnpidacpi(id->id))
			return id->id;
	}

	return NULL;
}

static int __init pnpacpi_add_device(struct acpi_device *device)
{
	struct pnp_dev *dev;
	char *pnpid;
	struct acpi_hardware_id *id;
	int error;

	/* Skip devices that are already bound */
	if (device->physical_node_count)
		return 0;

	/*
	 * If a PnPacpi device is not present , the device
	 * driver should not be loaded.
	 */
	if (!acpi_has_method(device->handle, "_CRS"))
		return 0;

	pnpid = pnpacpi_get_id(device);
	if (!pnpid)
		return 0;

	if (!device->status.present)
		return 0;

	dev = pnp_alloc_dev(&pnpacpi_protocol, num, pnpid);
	if (!dev)
		return -ENOMEM;

	dev->data = device;
	/* .enabled means the device can decode the resources */
	dev->active = device->status.enabled;
	if (acpi_has_method(device->handle, "_SRS"))
		dev->capabilities |= PNP_CONFIGURABLE;
	dev->capabilities |= PNP_READ;
	if (device->flags.dynamic_status && (dev->capabilities & PNP_CONFIGURABLE))
		dev->capabilities |= PNP_WRITE;
	if (device->flags.removable)
		dev->capabilities |= PNP_REMOVABLE;
	if (acpi_has_method(device->handle, "_DIS"))
		dev->capabilities |= PNP_DISABLE;

	if (strlen(acpi_device_name(device)))
		strncpy(dev->name, acpi_device_name(device), sizeof(dev->name));
	else
		strncpy(dev->name, acpi_device_bid(device), sizeof(dev->name));

	if (dev->active)
		pnpacpi_parse_allocated_resource(dev);

	if (dev->capabilities & PNP_CONFIGURABLE)
		pnpacpi_parse_resource_option_data(dev);

	list_for_each_entry(id, &device->pnp.ids, list) {
		if (!strcmp(id->id, pnpid))
			continue;
		if (!ispnpidacpi(id->id))
			continue;
		pnp_add_id(dev, id->id);
	}

	/* clear out the damaged flags */
	if (!dev->active)
		pnp_init_resources(dev);

	error = pnp_add_device(dev);
	if (error) {
		put_device(&dev->dev);
		return error;
	}

	num++;

	return 0;
}

static acpi_status __init pnpacpi_add_device_handler(acpi_handle handle,
						     u32 lvl, void *context,
						     void **rv)
{
	struct acpi_device *device;

	if (acpi_bus_get_device(handle, &device))
		return AE_CTRL_DEPTH;
	if (acpi_is_pnp_device(device))
		pnpacpi_add_device(device);
	return AE_OK;
}

static int __init acpi_pnp_match(struct device *dev, void *_pnp)
{
	struct acpi_device *acpi = to_acpi_device(dev);
	struct pnp_dev *pnp = _pnp;

	/* true means it matched */
	return !acpi->physical_node_count
	    && compare_pnp_id(pnp->id, acpi_device_hid(acpi));
}

static struct acpi_device * __init acpi_pnp_find_companion(struct device *dev)
{
	dev = bus_find_device(&acpi_bus_type, NULL, to_pnp_dev(dev),
			      acpi_pnp_match);
	if (!dev)
		return NULL;

	put_device(dev);
	return to_acpi_device(dev);
}

/* complete initialization of a PNPACPI device includes having
 * pnpdev->dev.archdata.acpi_handle point to its ACPI sibling.
 */
static bool acpi_pnp_bus_match(struct device *dev)
{
	return dev->bus == &pnp_bus_type;
}

static struct acpi_bus_type __initdata acpi_pnp_bus = {
	.name	     = "PNP",
	.match	     = acpi_pnp_bus_match,
	.find_companion = acpi_pnp_find_companion,
};

int pnpacpi_disabled __initdata;
static int __init pnpacpi_init(void)
{
	if (acpi_disabled || pnpacpi_disabled) {
		printk(KERN_INFO "pnp: PnP ACPI: disabled\n");
		return 0;
	}
	printk(KERN_INFO "pnp: PnP ACPI init\n");
	pnp_register_protocol(&pnpacpi_protocol);
	register_acpi_bus_type(&acpi_pnp_bus);
	acpi_get_devices(NULL, pnpacpi_add_device_handler, NULL, NULL);
	printk(KERN_INFO "pnp: PnP ACPI: found %d devices\n", num);
	unregister_acpi_bus_type(&acpi_pnp_bus);
	pnp_platform_devices = 1;
	return 0;
}

fs_initcall(pnpacpi_init);

static int __init pnpacpi_setup(char *str)
{
	if (str == NULL)
		return 1;
	if (!strncmp(str, "off", 3))
		pnpacpi_disabled = 1;
	return 1;
}

__setup("pnpacpi=", pnpacpi_setup);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* pnpacpi -- PnP ACPI driver
	3	*
	4	* Copyright (c) 2004 Matthieu Castet <castet.matthieu@free.fr>
	5	* Copyright (c) 2004 Li Shaohua <shaohua.li@intel.com>
55955aad	6	*
1da177e4 LT	7	* This program is free software; you can redistribute it and/or modify it
	8	* under the terms of the GNU General Public License as published by the
	9	* Free Software Foundation; either version 2, or (at your option) any
	10	* later version.
	11	*
	12	* This program is distributed in the hope that it will be useful, but
	13	* WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	15	* General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program; if not, write to the Free Software
	19	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	20	*/
55955aad	21
26e6e9e5	22	#include <linux/export.h>
1da177e4 LT	23	#include <linux/acpi.h>
1da177e4 LT	24	#include <linux/pnp.h>
5a0e3ad6	25	#include <linux/slab.h>
29b71a1c	26	#include <linux/mod_devicetable.h>
29b71a1c	27
1692b27b	28	#include "../base.h"
1da177e4 LT	29	#include "pnpacpi.h"
1da177e4 LT	30
420a0f66	31	static int num;
1da177e4	32
1da177e4 LT	33	/*
	34	* Compatible Device IDs
	35	*/
	36	#define TEST_HEX(c) \
	37	if (!(('0' <= (c) && (c) <= '9') \|\| ('A' <= (c) && (c) <= 'F'))) \
	38	return 0
	39	#define TEST_ALPHA(c) \
cdc87c5a	40	if (!('A' <= (c) && (c) <= 'Z')) \
1da177e4	41	return 0
620e112c	42	static int __init ispnpidacpi(const char *id)
1da177e4 LT	43	{
	44	TEST_ALPHA(id[0]);
	45	TEST_ALPHA(id[1]);
	46	TEST_ALPHA(id[2]);
	47	TEST_HEX(id[3]);
	48	TEST_HEX(id[4]);
	49	TEST_HEX(id[5]);
	50	TEST_HEX(id[6]);
	51	if (id[7] != '\0')
	52	return 0;
	53	return 1;
	54	}
	55
59284cb4	56	static int pnpacpi_get_resources(struct pnp_dev *dev)
1da177e4	57	{
2f53432c	58	pnp_dbg(&dev->dev, "get resources\n");
d152cf5d	59	return pnpacpi_parse_allocated_resource(dev);
1da177e4 LT	60	}
1da177e4 LT	61
59284cb4	62	static int pnpacpi_set_resources(struct pnp_dev *dev)
1da177e4	63	{
cc8e7a35 RW	64	struct acpi_device *acpi_dev;
cc8e7a35 RW	65	acpi_handle handle;
a8d22396	66	int ret = 0;
1da177e4	67
2f53432c	68	pnp_dbg(&dev->dev, "set resources\n");
cc8e7a35	69
3a83f992	70	handle = ACPI_HANDLE(&dev->dev);
cfc57557	71	if (!handle \|\| acpi_bus_get_device(handle, &acpi_dev)) {
cc8e7a35 RW	72	dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__);
	73	return -ENODEV;
	74	}
	75
a6b5e88c RW	76	if (WARN_ON_ONCE(acpi_dev != dev->data))
	77	dev->data = acpi_dev;
	78
a8d22396 RW	79	if (acpi_has_method(handle, METHOD_NAME__SRS)) {
	80	struct acpi_buffer buffer;
	81
	82	ret = pnpacpi_build_resource_template(dev, &buffer);
	83	if (ret)
	84	return ret;
	85
	86	ret = pnpacpi_encode_resources(dev, &buffer);
	87	if (!ret) {
	88	acpi_status status;
	89
	90	status = acpi_set_current_resources(handle, &buffer);
	91	if (ACPI_FAILURE(status))
	92	ret = -EIO;
	93	}
1da177e4	94	kfree(buffer.pointer);
1da177e4	95	}
a8d22396	96	if (!ret && acpi_bus_power_manageable(handle))
6328a574	97	ret = acpi_bus_set_power(handle, ACPI_STATE_D0);
a8d22396	98
1da177e4 LT	99	return ret;
	100	}
	101
	102	static int pnpacpi_disable_resources(struct pnp_dev *dev)
	103	{
cc8e7a35 RW	104	struct acpi_device *acpi_dev;
cc8e7a35 RW	105	acpi_handle handle;
a8d22396	106	acpi_status status;
6328a574 WS	107
6328a574 WS	108	dev_dbg(&dev->dev, "disable resources\n");
55955aad	109
3a83f992	110	handle = ACPI_HANDLE(&dev->dev);
cfc57557	111	if (!handle \|\| acpi_bus_get_device(handle, &acpi_dev)) {
cc8e7a35 RW	112	dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__);
	113	return 0;
	114	}
	115
1da177e4	116	/* acpi_unregister_gsi(pnp_irq(dev, 0)); */
19bde778	117	if (acpi_bus_power_manageable(handle))
8ad928d5	118	acpi_bus_set_power(handle, ACPI_STATE_D3_COLD);
a8d22396 RW	119
	120	/* continue even if acpi_bus_set_power() fails */
	121	status = acpi_evaluate_object(handle, "_DIS", NULL, NULL);
	122	if (ACPI_FAILURE(status) && status != AE_NOT_FOUND)
	123	return -ENODEV;
	124
	125	return 0;
1da177e4 LT	126	}
1da177e4 LT	127
673d5b43	128	#ifdef CONFIG_ACPI_SLEEP
b14e033e AS	129	static bool pnpacpi_can_wakeup(struct pnp_dev *dev)
b14e033e AS	130	{
cc8e7a35 RW	131	struct acpi_device *acpi_dev;
	132	acpi_handle handle;
	133
3a83f992	134	handle = ACPI_HANDLE(&dev->dev);
cfc57557	135	if (!handle \|\| acpi_bus_get_device(handle, &acpi_dev)) {
cc8e7a35 RW	136	dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__);
	137	return false;
	138	}
b14e033e AS	139
	140	return acpi_bus_can_wakeup(handle);
	141	}
	142
fc30e68e SL	143	static int pnpacpi_suspend(struct pnp_dev *dev, pm_message_t state)
fc30e68e SL	144	{
cc8e7a35 RW	145	struct acpi_device *acpi_dev;
	146	acpi_handle handle;
	147	int error = 0;
	148
3a83f992	149	handle = ACPI_HANDLE(&dev->dev);
cfc57557	150	if (!handle \|\| acpi_bus_get_device(handle, &acpi_dev)) {
cc8e7a35 RW	151	dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__);
	152	return 0;
	153	}
36e02b62	154
b14e033e	155	if (device_can_wakeup(&dev->dev)) {
cc8e7a35	156	error = acpi_pm_device_sleep_wake(&dev->dev,
b14e033e	157	device_may_wakeup(&dev->dev));
cc8e7a35 RW	158	if (error)
	159	return error;
	160	}
	161
	162	if (acpi_bus_power_manageable(handle)) {
ee85f543	163	int power_state = acpi_pm_device_sleep_state(&dev->dev, NULL,
8ad928d5	164	ACPI_STATE_D3_COLD);
cc8e7a35 RW	165	if (power_state < 0)
cc8e7a35 RW	166	power_state = (state.event == PM_EVENT_ON) ?
8ad928d5	167	ACPI_STATE_D0 : ACPI_STATE_D3_COLD;
cc8e7a35 RW	168
	169	/*
	170	* acpi_bus_set_power() often fails (keyboard port can't be
	171	* powered-down?), and in any case, our return value is ignored
	172	* by pnp_bus_suspend(). Hence we don't revert the wakeup
	173	* setting if the set_power fails.
	174	*/
	175	error = acpi_bus_set_power(handle, power_state);
b14e033e	176	}
cc8e7a35 RW	177
cc8e7a35 RW	178	return error;
fc30e68e SL	179	}
	180
	181	static int pnpacpi_resume(struct pnp_dev *dev)
	182	{
cc8e7a35	183	struct acpi_device *acpi_dev;
3a83f992	184	acpi_handle handle = ACPI_HANDLE(&dev->dev);
cc8e7a35 RW	185	int error = 0;
cc8e7a35 RW	186
cfc57557	187	if (!handle \|\| acpi_bus_get_device(handle, &acpi_dev)) {
cc8e7a35 RW	188	dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__);
	189	return -ENODEV;
	190	}
c4da6940	191
b14e033e AS	192	if (device_may_wakeup(&dev->dev))
b14e033e AS	193	acpi_pm_device_sleep_wake(&dev->dev, false);
cc8e7a35 RW	194
	195	if (acpi_bus_power_manageable(handle))
	196	error = acpi_bus_set_power(handle, ACPI_STATE_D0);
	197
	198	return error;
fc30e68e	199	}
673d5b43	200	#endif
fc30e68e	201
9065ce45	202	struct pnp_protocol pnpacpi_protocol = {
07d4e9af BH	203	.name = "Plug and Play ACPI",
	204	.get = pnpacpi_get_resources,
	205	.set = pnpacpi_set_resources,
1da177e4	206	.disable = pnpacpi_disable_resources,
673d5b43	207	#ifdef CONFIG_ACPI_SLEEP
b14e033e	208	.can_wakeup = pnpacpi_can_wakeup,
fc30e68e SL	209	.suspend = pnpacpi_suspend,
fc30e68e SL	210	.resume = pnpacpi_resume,
673d5b43	211	#endif
1da177e4	212	};
9065ce45	213	EXPORT_SYMBOL(pnpacpi_protocol);
1da177e4	214
66c3ec4f	215	static char __init pnpacpi_get_id(struct acpi_device device)
420a0f66 DT	216	{
	217	struct acpi_hardware_id *id;
	218
	219	list_for_each_entry(id, &device->pnp.ids, list) {
	220	if (ispnpidacpi(id->id))
	221	return id->id;
	222	}
	223
	224	return NULL;
	225	}
	226
1da177e4 LT	227	static int __init pnpacpi_add_device(struct acpi_device *device)
1da177e4 LT	228	{
1da177e4	229	struct pnp_dev *dev;
420a0f66	230	char *pnpid;
7f47fa6c	231	struct acpi_hardware_id *id;
249135d1	232	int error;
1da177e4	233
29058753 AH	234	/* Skip devices that are already bound */
	235	if (device->physical_node_count)
	236	return 0;
	237
39a0ad87 ZY	238	/*
	239	* If a PnPacpi device is not present , the device
	240	* driver should not be loaded.
	241	*/
0e77e2c4	242	if (!acpi_has_method(device->handle, "_CRS"))
420a0f66 DT	243	return 0;
	244
	245	pnpid = pnpacpi_get_id(device);
	246	if (!pnpid)
	247	return 0;
	248
eec15edb	249	if (!device->status.present)
1da177e4 LT	250	return 0;
1da177e4 LT	251
420a0f66	252	dev = pnp_alloc_dev(&pnpacpi_protocol, num, pnpid);
bda1e4e5	253	if (!dev)
1da177e4	254	return -ENOMEM;
bda1e4e5	255
c4da6940	256	dev->data = device;
07d4e9af	257	/* .enabled means the device can decode the resources */
1da177e4	258	dev->active = device->status.enabled;
0e77e2c4	259	if (acpi_has_method(device->handle, "_SRS"))
1da177e4 LT	260	dev->capabilities \|= PNP_CONFIGURABLE;
1da177e4 LT	261	dev->capabilities \|= PNP_READ;
856608ee	262	if (device->flags.dynamic_status && (dev->capabilities & PNP_CONFIGURABLE))
1da177e4 LT	263	dev->capabilities \|= PNP_WRITE;
	264	if (device->flags.removable)
	265	dev->capabilities \|= PNP_REMOVABLE;
0e77e2c4	266	if (acpi_has_method(device->handle, "_DIS"))
1da177e4 LT	267	dev->capabilities \|= PNP_DISABLE;
1da177e4 LT	268
1da177e4 LT	269	if (strlen(acpi_device_name(device)))
	270	strncpy(dev->name, acpi_device_name(device), sizeof(dev->name));
	271	else
	272	strncpy(dev->name, acpi_device_bid(device), sizeof(dev->name));
	273
d152cf5d BH	274	if (dev->active)
d152cf5d BH	275	pnpacpi_parse_allocated_resource(dev);
1da177e4	276
d152cf5d BH	277	if (dev->capabilities & PNP_CONFIGURABLE)
d152cf5d BH	278	pnpacpi_parse_resource_option_data(dev);
55955aad	279
7f47fa6c	280	list_for_each_entry(id, &device->pnp.ids, list) {
420a0f66	281	if (!strcmp(id->id, pnpid))
7f47fa6c BH	282	continue;
	283	if (!ispnpidacpi(id->id))
	284	continue;
	285	pnp_add_id(dev, id->id);
1da177e4 LT	286	}
	287
	288	/* clear out the damaged flags */
	289	if (!dev->active)
f4490002	290	pnp_init_resources(dev);
249135d1 DT	291
	292	error = pnp_add_device(dev);
	293	if (error) {
	294	put_device(&dev->dev);
	295	return error;
	296	}
	297
9dd78466	298	num++;
1da177e4	299
249135d1	300	return 0;
1da177e4 LT	301	}
	302
	303	static acpi_status __init pnpacpi_add_device_handler(acpi_handle handle,
9dd78466 BH	304	u32 lvl, void *context,
9dd78466 BH	305	void **rv)
1da177e4 LT	306	{
	307	struct acpi_device *device;
	308
eec15edb	309	if (acpi_bus_get_device(handle, &device))
1da177e4	310	return AE_CTRL_DEPTH;
eec15edb ZR	311	if (acpi_is_pnp_device(device))
eec15edb ZR	312	pnpacpi_add_device(device);
1da177e4 LT	313	return AE_OK;
	314	}
	315
55955aad DB	316	static int __init acpi_pnp_match(struct device dev, void _pnp)
55955aad DB	317	{
9dd78466 BH	318	struct acpi_device *acpi = to_acpi_device(dev);
9dd78466 BH	319	struct pnp_dev *pnp = _pnp;
55955aad DB	320
55955aad DB	321	/* true means it matched */
1033f904	322	return !acpi->physical_node_count
ea8d82fd	323	&& compare_pnp_id(pnp->id, acpi_device_hid(acpi));
55955aad DB	324	}
55955aad DB	325
e3f02c52	326	static struct acpi_device * __init acpi_pnp_find_companion(struct device *dev)
55955aad	327	{
e3f02c52 RW	328	dev = bus_find_device(&acpi_bus_type, NULL, to_pnp_dev(dev),
	329	acpi_pnp_match);
	330	if (!dev)
	331	return NULL;
55955aad	332
e3f02c52 RW	333	put_device(dev);
e3f02c52 RW	334	return to_acpi_device(dev);
55955aad DB	335	}
	336
	337	/* complete initialization of a PNPACPI device includes having
	338	* pnpdev->dev.archdata.acpi_handle point to its ACPI sibling.
	339	*/
53540098 RW	340	static bool acpi_pnp_bus_match(struct device *dev)
	341	{
	342	return dev->bus == &pnp_bus_type;
	343	}
	344
55955aad	345	static struct acpi_bus_type __initdata acpi_pnp_bus = {
53540098 RW	346	.name = "PNP",
53540098 RW	347	.match = acpi_pnp_bus_match,
e3f02c52	348	.find_companion = acpi_pnp_find_companion,
55955aad DB	349	};
55955aad DB	350
1da177e4	351	int pnpacpi_disabled __initdata;
b449f63c	352	static int __init pnpacpi_init(void)
1da177e4 LT	353	{
1da177e4 LT	354	if (acpi_disabled \|\| pnpacpi_disabled) {
c865d2f6	355	printk(KERN_INFO "pnp: PnP ACPI: disabled\n");
1da177e4 LT	356	return 0;
1da177e4 LT	357	}
c865d2f6	358	printk(KERN_INFO "pnp: PnP ACPI init\n");
1da177e4	359	pnp_register_protocol(&pnpacpi_protocol);
55955aad	360	register_acpi_bus_type(&acpi_pnp_bus);
1da177e4	361	acpi_get_devices(NULL, pnpacpi_add_device_handler, NULL, NULL);
c865d2f6	362	printk(KERN_INFO "pnp: PnP ACPI: found %d devices\n", num);
55955aad	363	unregister_acpi_bus_type(&acpi_pnp_bus);
8f81dd14	364	pnp_platform_devices = 1;
1da177e4 LT	365	return 0;
1da177e4 LT	366	}
9dd78466	367
ed458df4	368	fs_initcall(pnpacpi_init);
1da177e4 LT	369
	370	static int __init pnpacpi_setup(char *str)
	371	{
	372	if (str == NULL)
	373	return 1;
	374	if (!strncmp(str, "off", 3))
	375	pnpacpi_disabled = 1;
	376	return 1;
	377	}
9dd78466	378
1da177e4	379	__setup("pnpacpi=", pnpacpi_setup);