[linux-block.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/acpi.h>
#include <linux/pnp.h>
#include <linux/mod_devicetable.h>
#include <acpi/acpi_bus.h>
#include <acpi/actypes.h>

#include "pnpacpi.h"

static int num = 0;

/* We need only to blacklist devices that have already an acpi driver that
 * can't use pnp layer. We don't need to blacklist device that are directly
 * used by the kernel (PCI root, ...), as it is harmless and there were
 * already present in pnpbios. But there is an exception for devices that
 * have irqs (PIC, Timer) because we call acpi_register_gsi.
 * Finaly only devices that have a CRS method need to be in this list.
 */
static __initdata struct acpi_device_id excluded_id_list[] = {
	{"PNP0C09", 0},		/* EC */
	{"PNP0C0F", 0},		/* Link device */
	{"PNP0000", 0},		/* PIC */
	{"PNP0100", 0},		/* Timer */
	{"", 0},
};

static inline int is_exclusive_device(struct acpi_device *dev)
{
	return (!acpi_match_device_ids(dev, excluded_id_list));
}

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

static int pnpacpi_get_resources(struct pnp_dev *dev,
				 struct pnp_resource_table *res)
{
	acpi_status status;
	status = pnpacpi_parse_allocated_resource((acpi_handle) dev->data,
						  &dev->res);
	return ACPI_FAILURE(status) ? -ENODEV : 0;
}

static int pnpacpi_set_resources(struct pnp_dev *dev,
				 struct pnp_resource_table *res)
{
	acpi_handle handle = dev->data;
	struct acpi_buffer buffer;
	int ret = 0;
	acpi_status status;

	ret = pnpacpi_build_resource_template(handle, &buffer);
	if (ret)
		return ret;
	ret = pnpacpi_encode_resources(res, &buffer);
	if (ret) {
		kfree(buffer.pointer);
		return ret;
	}
	status = acpi_set_current_resources(handle, &buffer);
	if (ACPI_FAILURE(status))
		ret = -EINVAL;
	kfree(buffer.pointer);
	return ret;
}

static int pnpacpi_disable_resources(struct pnp_dev *dev)
{
	acpi_status status;

	/* acpi_unregister_gsi(pnp_irq(dev, 0)); */
	status = acpi_evaluate_object((acpi_handle) dev->data,
				      "_DIS", NULL, NULL);
	return ACPI_FAILURE(status) ? -ENODEV : 0;
}

static int pnpacpi_suspend(struct pnp_dev *dev, pm_message_t state)
{
	return acpi_bus_set_power((acpi_handle) dev->data,
				  acpi_pm_device_sleep_state(&dev->dev,
							     device_may_wakeup
							     (&dev->dev),
							     NULL));
}

static int pnpacpi_resume(struct pnp_dev *dev)
{
	return acpi_bus_set_power((acpi_handle) dev->data, ACPI_STATE_D0);
}

static struct pnp_protocol pnpacpi_protocol = {
	.name = "Plug and Play ACPI",
	.get = pnpacpi_get_resources,
	.set = pnpacpi_set_resources,
	.disable = pnpacpi_disable_resources,
	.suspend = pnpacpi_suspend,
	.resume = pnpacpi_resume,
};

static int __init pnpacpi_add_device(struct acpi_device *device)
{
	acpi_handle temp = NULL;
	acpi_status status;
	struct pnp_id *dev_id;
	struct pnp_dev *dev;

	status = acpi_get_handle(device->handle, "_CRS", &temp);
	if (ACPI_FAILURE(status) || !ispnpidacpi(acpi_device_hid(device)) ||
	    is_exclusive_device(device))
		return 0;

	pnp_dbg("ACPI device : hid %s", acpi_device_hid(device));
	dev = kzalloc(sizeof(struct pnp_dev), GFP_KERNEL);
	if (!dev) {
		pnp_err("Out of memory");
		return -ENOMEM;
	}
	dev->data = device->handle;
	/* .enabled means if the device can decode the resources */
	dev->active = device->status.enabled;
	status = acpi_get_handle(device->handle, "_SRS", &temp);
	if (ACPI_SUCCESS(status))
		dev->capabilities |= PNP_CONFIGURABLE;
	dev->capabilities |= PNP_READ;
	if (device->flags.dynamic_status)
		dev->capabilities |= PNP_WRITE;
	if (device->flags.removable)
		dev->capabilities |= PNP_REMOVABLE;
	status = acpi_get_handle(device->handle, "_DIS", &temp);
	if (ACPI_SUCCESS(status))
		dev->capabilities |= PNP_DISABLE;

	dev->protocol = &pnpacpi_protocol;

	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));

	dev->number = num;

	/* set the initial values for the PnP device */
	dev_id = kzalloc(sizeof(struct pnp_id), GFP_KERNEL);
	if (!dev_id)
		goto err;
	pnpidacpi_to_pnpid(acpi_device_hid(device), dev_id->id);
	pnp_add_id(dev_id, dev);

	if (dev->active) {
		/* parse allocated resource */
		status =
		    pnpacpi_parse_allocated_resource(device->handle, &dev->res);
		if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) {
			pnp_err("PnPACPI: METHOD_NAME__CRS failure for %s",
				dev_id->id);
			goto err1;
		}
	}

	if (dev->capabilities & PNP_CONFIGURABLE) {
		status = pnpacpi_parse_resource_option_data(device->handle,
							    dev);
		if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) {
			pnp_err("PnPACPI: METHOD_NAME__PRS failure for %s",
				dev_id->id);
			goto err1;
		}
	}

	/* parse compatible ids */
	if (device->flags.compatible_ids) {
		struct acpi_compatible_id_list *cid_list = device->pnp.cid_list;
		int i;

		for (i = 0; i < cid_list->count; i++) {
			if (!ispnpidacpi(cid_list->id[i].value))
				continue;
			dev_id = kzalloc(sizeof(struct pnp_id), GFP_KERNEL);
			if (!dev_id)
				continue;

			pnpidacpi_to_pnpid(cid_list->id[i].value, dev_id->id);
			pnp_add_id(dev_id, dev);
		}
	}

	/* clear out the damaged flags */
	if (!dev->active)
		pnp_init_resource_table(&dev->res);
	pnp_add_device(dev);
	num++;

	return AE_OK;
      err1:
	kfree(dev_id);
      err:
	kfree(dev);
	return -EINVAL;
}

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))
		pnpacpi_add_device(device);
	else
		return AE_CTRL_DEPTH;
	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->flags.hardware_id
	    && !acpi_get_physical_device(acpi->handle)
	    && compare_pnp_id(pnp->id, acpi->pnp.hardware_id);
}

static int __init acpi_pnp_find_device(struct device *dev, acpi_handle * handle)
{
	struct device *adev;
	struct acpi_device *acpi;

	adev = bus_find_device(&acpi_bus_type, NULL,
			       to_pnp_dev(dev), acpi_pnp_match);
	if (!adev)
		return -ENODEV;

	acpi = to_acpi_device(adev);
	*handle = acpi->handle;
	put_device(adev);
	return 0;
}

/* complete initialization of a PNPACPI device includes having
 * pnpdev->dev.archdata.acpi_handle point to its ACPI sibling.
 */
static struct acpi_bus_type __initdata acpi_pnp_bus = {
	.bus = &pnp_bus_type,
	.find_device = acpi_pnp_find_device,
};

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

subsys_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);

#if 0
EXPORT_SYMBOL(pnpacpi_protocol);
#endif
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
1da177e4 LT	22	#include <linux/acpi.h>
1da177e4 LT	23	#include <linux/pnp.h>
29b71a1c	24	#include <linux/mod_devicetable.h>
1da177e4	25	#include <acpi/acpi_bus.h>
29b71a1c TR	26	#include <acpi/actypes.h>
29b71a1c TR	27
1da177e4 LT	28	#include "pnpacpi.h"
	29
	30	static int num = 0;
	31
c4bb6f5a	32	/* We need only to blacklist devices that have already an acpi driver that
	33	* can't use pnp layer. We don't need to blacklist device that are directly
	34	* used by the kernel (PCI root, ...), as it is harmless and there were
	35	* already present in pnpbios. But there is an exception for devices that
	36	* have irqs (PIC, Timer) because we call acpi_register_gsi.
	37	* Finaly only devices that have a CRS method need to be in this list.
	38	*/
9dd78466 BH	39	static __initdata struct acpi_device_id excluded_id_list[] = {
	40	{"PNP0C09", 0}, /* EC */
	41	{"PNP0C0F", 0}, /* Link device */
	42	{"PNP0000", 0}, /* PIC */
	43	{"PNP0100", 0}, /* Timer */
29b71a1c TR	44	{"", 0},
	45	};
	46
1da177e4 LT	47	static inline int is_exclusive_device(struct acpi_device *dev)
1da177e4 LT	48	{
29b71a1c	49	return (!acpi_match_device_ids(dev, excluded_id_list));
1da177e4 LT	50	}
1da177e4 LT	51
1da177e4 LT	52	/*
	53	* Compatible Device IDs
	54	*/
	55	#define TEST_HEX(c) \
	56	if (!(('0' <= (c) && (c) <= '9') \|\| ('A' <= (c) && (c) <= 'F'))) \
	57	return 0
	58	#define TEST_ALPHA(c) \
	59	if (!('@' <= (c) \|\| (c) <= 'Z')) \
	60	return 0
	61	static int __init ispnpidacpi(char *id)
	62	{
	63	TEST_ALPHA(id[0]);
	64	TEST_ALPHA(id[1]);
	65	TEST_ALPHA(id[2]);
	66	TEST_HEX(id[3]);
	67	TEST_HEX(id[4]);
	68	TEST_HEX(id[5]);
	69	TEST_HEX(id[6]);
	70	if (id[7] != '\0')
	71	return 0;
	72	return 1;
	73	}
	74
	75	static void __init pnpidacpi_to_pnpid(char id, char str)
	76	{
	77	str[0] = id[0];
	78	str[1] = id[1];
	79	str[2] = id[2];
	80	str[3] = tolower(id[3]);
	81	str[4] = tolower(id[4]);
	82	str[5] = tolower(id[5]);
	83	str[6] = tolower(id[6]);
	84	str[7] = '\0';
	85	}
	86
9dd78466 BH	87	static int pnpacpi_get_resources(struct pnp_dev *dev,
9dd78466 BH	88	struct pnp_resource_table *res)
1da177e4 LT	89	{
1da177e4 LT	90	acpi_status status;
9dd78466 BH	91	status = pnpacpi_parse_allocated_resource((acpi_handle) dev->data,
9dd78466 BH	92	&dev->res);
1da177e4 LT	93	return ACPI_FAILURE(status) ? -ENODEV : 0;
	94	}
	95
9dd78466 BH	96	static int pnpacpi_set_resources(struct pnp_dev *dev,
9dd78466 BH	97	struct pnp_resource_table *res)
1da177e4 LT	98	{
	99	acpi_handle handle = dev->data;
	100	struct acpi_buffer buffer;
	101	int ret = 0;
	102	acpi_status status;
	103
	104	ret = pnpacpi_build_resource_template(handle, &buffer);
	105	if (ret)
	106	return ret;
	107	ret = pnpacpi_encode_resources(res, &buffer);
	108	if (ret) {
	109	kfree(buffer.pointer);
	110	return ret;
	111	}
	112	status = acpi_set_current_resources(handle, &buffer);
	113	if (ACPI_FAILURE(status))
	114	ret = -EINVAL;
	115	kfree(buffer.pointer);
	116	return ret;
	117	}
	118
	119	static int pnpacpi_disable_resources(struct pnp_dev *dev)
	120	{
	121	acpi_status status;
55955aad	122
1da177e4	123	/* acpi_unregister_gsi(pnp_irq(dev, 0)); */
9dd78466 BH	124	status = acpi_evaluate_object((acpi_handle) dev->data,
9dd78466 BH	125	"_DIS", NULL, NULL);
1da177e4 LT	126	return ACPI_FAILURE(status) ? -ENODEV : 0;
	127	}
	128
fc30e68e SL	129	static int pnpacpi_suspend(struct pnp_dev *dev, pm_message_t state)
fc30e68e SL	130	{
9dd78466 BH	131	return acpi_bus_set_power((acpi_handle) dev->data,
	132	acpi_pm_device_sleep_state(&dev->dev,
	133	device_may_wakeup
	134	(&dev->dev),
	135	NULL));
fc30e68e SL	136	}
	137
	138	static int pnpacpi_resume(struct pnp_dev *dev)
	139	{
9dd78466	140	return acpi_bus_set_power((acpi_handle) dev->data, ACPI_STATE_D0);
fc30e68e SL	141	}
fc30e68e SL	142
b449f63c	143	static struct pnp_protocol pnpacpi_protocol = {
9dd78466 BH	144	.name = "Plug and Play ACPI",
	145	.get = pnpacpi_get_resources,
	146	.set = pnpacpi_set_resources,
1da177e4	147	.disable = pnpacpi_disable_resources,
fc30e68e SL	148	.suspend = pnpacpi_suspend,
fc30e68e SL	149	.resume = pnpacpi_resume,
1da177e4 LT	150	};
	151
	152	static int __init pnpacpi_add_device(struct acpi_device *device)
	153	{
	154	acpi_handle temp = NULL;
	155	acpi_status status;
	156	struct pnp_id *dev_id;
	157	struct pnp_dev *dev;
	158
07b0120d	159	status = acpi_get_handle(device->handle, "_CRS", &temp);
07b0120d	160	if (ACPI_FAILURE(status) \|\| !ispnpidacpi(acpi_device_hid(device)) \|\|
9dd78466	161	is_exclusive_device(device))
1da177e4 LT	162	return 0;
	163
	164	pnp_dbg("ACPI device : hid %s", acpi_device_hid(device));
9dd78466	165	dev = kzalloc(sizeof(struct pnp_dev), GFP_KERNEL);
1da177e4 LT	166	if (!dev) {
	167	pnp_err("Out of memory");
	168	return -ENOMEM;
	169	}
	170	dev->data = device->handle;
	171	/* .enabled means if the device can decode the resources */
	172	dev->active = device->status.enabled;
	173	status = acpi_get_handle(device->handle, "_SRS", &temp);
	174	if (ACPI_SUCCESS(status))
	175	dev->capabilities \|= PNP_CONFIGURABLE;
	176	dev->capabilities \|= PNP_READ;
	177	if (device->flags.dynamic_status)
	178	dev->capabilities \|= PNP_WRITE;
	179	if (device->flags.removable)
	180	dev->capabilities \|= PNP_REMOVABLE;
	181	status = acpi_get_handle(device->handle, "_DIS", &temp);
	182	if (ACPI_SUCCESS(status))
	183	dev->capabilities \|= PNP_DISABLE;
	184
	185	dev->protocol = &pnpacpi_protocol;
	186
	187	if (strlen(acpi_device_name(device)))
	188	strncpy(dev->name, acpi_device_name(device), sizeof(dev->name));
	189	else
	190	strncpy(dev->name, acpi_device_bid(device), sizeof(dev->name));
	191
	192	dev->number = num;
55955aad	193
1da177e4	194	/* set the initial values for the PnP device */
cd861280	195	dev_id = kzalloc(sizeof(struct pnp_id), GFP_KERNEL);
1da177e4 LT	196	if (!dev_id)
	197	goto err;
	198	pnpidacpi_to_pnpid(acpi_device_hid(device), dev_id->id);
	199	pnp_add_id(dev_id, dev);
	200
9dd78466	201	if (dev->active) {
1da177e4	202	/* parse allocated resource */
9dd78466 BH	203	status =
9dd78466 BH	204	pnpacpi_parse_allocated_resource(device->handle, &dev->res);
1da177e4	205	if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) {
9dd78466 BH	206	pnp_err("PnPACPI: METHOD_NAME__CRS failure for %s",
9dd78466 BH	207	dev_id->id);
1da177e4 LT	208	goto err1;
	209	}
	210	}
	211
9dd78466	212	if (dev->capabilities & PNP_CONFIGURABLE) {
55955aad	213	status = pnpacpi_parse_resource_option_data(device->handle,
9dd78466	214	dev);
1da177e4	215	if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) {
9dd78466 BH	216	pnp_err("PnPACPI: METHOD_NAME__PRS failure for %s",
9dd78466 BH	217	dev_id->id);
1da177e4 LT	218	goto err1;
	219	}
	220	}
55955aad	221
1da177e4 LT	222	/* parse compatible ids */
	223	if (device->flags.compatible_ids) {
	224	struct acpi_compatible_id_list *cid_list = device->pnp.cid_list;
	225	int i;
	226
	227	for (i = 0; i < cid_list->count; i++) {
	228	if (!ispnpidacpi(cid_list->id[i].value))
	229	continue;
cd861280	230	dev_id = kzalloc(sizeof(struct pnp_id), GFP_KERNEL);
1da177e4 LT	231	if (!dev_id)
	232	continue;
	233
	234	pnpidacpi_to_pnpid(cid_list->id[i].value, dev_id->id);
	235	pnp_add_id(dev_id, dev);
	236	}
	237	}
	238
	239	/* clear out the damaged flags */
	240	if (!dev->active)
	241	pnp_init_resource_table(&dev->res);
	242	pnp_add_device(dev);
9dd78466	243	num++;
1da177e4 LT	244
1da177e4 LT	245	return AE_OK;
9dd78466	246	err1:
1da177e4	247	kfree(dev_id);
9dd78466	248	err:
1da177e4 LT	249	kfree(dev);
	250	return -EINVAL;
	251	}
	252
	253	static acpi_status __init pnpacpi_add_device_handler(acpi_handle handle,
9dd78466 BH	254	u32 lvl, void *context,
9dd78466 BH	255	void **rv)
1da177e4 LT	256	{
	257	struct acpi_device *device;
	258
	259	if (!acpi_bus_get_device(handle, &device))
	260	pnpacpi_add_device(device);
	261	else
	262	return AE_CTRL_DEPTH;
	263	return AE_OK;
	264	}
	265
55955aad DB	266	static int __init acpi_pnp_match(struct device dev, void _pnp)
55955aad DB	267	{
9dd78466 BH	268	struct acpi_device *acpi = to_acpi_device(dev);
9dd78466 BH	269	struct pnp_dev *pnp = _pnp;
55955aad DB	270
	271	/* true means it matched */
	272	return acpi->flags.hardware_id
9dd78466 BH	273	&& !acpi_get_physical_device(acpi->handle)
9dd78466 BH	274	&& compare_pnp_id(pnp->id, acpi->pnp.hardware_id);
55955aad DB	275	}
55955aad DB	276
9dd78466	277	static int __init acpi_pnp_find_device(struct device dev, acpi_handle handle)
55955aad	278	{
9dd78466 BH	279	struct device *adev;
9dd78466 BH	280	struct acpi_device *acpi;
55955aad DB	281
55955aad DB	282	adev = bus_find_device(&acpi_bus_type, NULL,
9dd78466	283	to_pnp_dev(dev), acpi_pnp_match);
55955aad DB	284	if (!adev)
	285	return -ENODEV;
	286
	287	acpi = to_acpi_device(adev);
	288	*handle = acpi->handle;
	289	put_device(adev);
	290	return 0;
	291	}
	292
	293	/* complete initialization of a PNPACPI device includes having
	294	* pnpdev->dev.archdata.acpi_handle point to its ACPI sibling.
	295	*/
	296	static struct acpi_bus_type __initdata acpi_pnp_bus = {
	297	.bus = &pnp_bus_type,
	298	.find_device = acpi_pnp_find_device,
	299	};
	300
1da177e4	301	int pnpacpi_disabled __initdata;
b449f63c	302	static int __init pnpacpi_init(void)
1da177e4 LT	303	{
	304	if (acpi_disabled \|\| pnpacpi_disabled) {
	305	pnp_info("PnP ACPI: disabled");
	306	return 0;
	307	}
	308	pnp_info("PnP ACPI init");
	309	pnp_register_protocol(&pnpacpi_protocol);
55955aad	310	register_acpi_bus_type(&acpi_pnp_bus);
1da177e4 LT	311	acpi_get_devices(NULL, pnpacpi_add_device_handler, NULL, NULL);
1da177e4 LT	312	pnp_info("PnP ACPI: found %d devices", num);
55955aad	313	unregister_acpi_bus_type(&acpi_pnp_bus);
8f81dd14	314	pnp_platform_devices = 1;
1da177e4 LT	315	return 0;
1da177e4 LT	316	}
9dd78466	317
1da177e4 LT	318	subsys_initcall(pnpacpi_init);
	319
	320	static int __init pnpacpi_setup(char *str)
	321	{
	322	if (str == NULL)
	323	return 1;
	324	if (!strncmp(str, "off", 3))
	325	pnpacpi_disabled = 1;
	326	return 1;
	327	}
9dd78466	328
1da177e4 LT	329	__setup("pnpacpi=", pnpacpi_setup);
1da177e4 LT	330
b449f63c	331	#if 0
1da177e4	332	EXPORT_SYMBOL(pnpacpi_protocol);
b449f63c	333	#endif