[deliverable/linux.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 <acpi/acpi_bus.h>

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

static int num;

/* 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.
 * Finally, only devices that have a CRS method need to be in this list.
 */
static struct acpi_device_id excluded_id_list[] __initdata = {
	{"PNP0C09", 0},		/* EC */
	{"PNP0C0F", 0},		/* Link device */
	{"PNP0000", 0},		/* PIC */
	{"PNP0100", 0},		/* Timer */
	{"", 0},
};

static inline int __init 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 (!('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;
	struct acpi_buffer buffer;
	int ret;

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

	handle = DEVICE_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;

	ret = pnpacpi_build_resource_template(dev, &buffer);
	if (ret)
		return ret;
	ret = pnpacpi_encode_resources(dev, &buffer);
	if (ret) {
		kfree(buffer.pointer);
		return ret;
	}
	if (ACPI_FAILURE(acpi_set_current_resources(handle, &buffer)))
		ret = -EINVAL;
	else if (acpi_bus_power_manageable(handle))
		ret = acpi_bus_set_power(handle, ACPI_STATE_D0);
	kfree(buffer.pointer);
	return ret;
}

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

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

	handle = DEVICE_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)); */
	ret = 0;
	if (acpi_bus_power_manageable(handle))
		acpi_bus_set_power(handle, ACPI_STATE_D3_COLD);
		/* continue even if acpi_bus_set_power() fails */
	if (ACPI_FAILURE(acpi_evaluate_object(handle, "_DIS", NULL, NULL)))
		ret = -ENODEV;
	return ret;
}

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

	handle = DEVICE_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 = DEVICE_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 = DEVICE_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)
{
	acpi_handle temp = NULL;
	acpi_status status;
	struct pnp_dev *dev;
	char *pnpid;
	struct acpi_hardware_id *id;

	/* 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.
	 */
	status = acpi_get_handle(device->handle, "_CRS", &temp);
	if (ACPI_FAILURE(status))
		return 0;

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

	if (is_exclusive_device(device) || !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;
	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_CONFIGURABLE))
		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;

	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);
	pnp_add_device(dev);
	num++;

	return AE_OK;
}

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->physical_node_count
	    && compare_pnp_id(pnp->id, acpi_device_hid(acpi));
}

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 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_device = acpi_pnp_find_device,
};

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>
1da177e4	27	#include <acpi/acpi_bus.h>
29b71a1c	28
1692b27b	29	#include "../base.h"
1da177e4 LT	30	#include "pnpacpi.h"
1da177e4 LT	31
420a0f66	32	static int num;
1da177e4	33
c4bb6f5a	34	/* We need only to blacklist devices that have already an acpi driver that
	35	* can't use pnp layer. We don't need to blacklist device that are directly
	36	* used by the kernel (PCI root, ...), as it is harmless and there were
	37	* already present in pnpbios. But there is an exception for devices that
	38	* have irqs (PIC, Timer) because we call acpi_register_gsi.
07d4e9af	39	* Finally, only devices that have a CRS method need to be in this list.
c4bb6f5a	40	*/
6bf69b5e	41	static struct acpi_device_id excluded_id_list[] __initdata = {
9dd78466 BH	42	{"PNP0C09", 0}, /* EC */
	43	{"PNP0C0F", 0}, /* Link device */
	44	{"PNP0000", 0}, /* PIC */
	45	{"PNP0100", 0}, /* Timer */
29b71a1c TR	46	{"", 0},
	47	};
	48
9448b0d4	49	static inline int __init is_exclusive_device(struct acpi_device *dev)
1da177e4	50	{
29b71a1c	51	return (!acpi_match_device_ids(dev, excluded_id_list));
1da177e4 LT	52	}
1da177e4 LT	53
1da177e4 LT	54	/*
	55	* Compatible Device IDs
	56	*/
	57	#define TEST_HEX(c) \
	58	if (!(('0' <= (c) && (c) <= '9') \|\| ('A' <= (c) && (c) <= 'F'))) \
	59	return 0
	60	#define TEST_ALPHA(c) \
cdc87c5a	61	if (!('A' <= (c) && (c) <= 'Z')) \
1da177e4	62	return 0
620e112c	63	static int __init ispnpidacpi(const char *id)
1da177e4 LT	64	{
	65	TEST_ALPHA(id[0]);
	66	TEST_ALPHA(id[1]);
	67	TEST_ALPHA(id[2]);
	68	TEST_HEX(id[3]);
	69	TEST_HEX(id[4]);
	70	TEST_HEX(id[5]);
	71	TEST_HEX(id[6]);
	72	if (id[7] != '\0')
	73	return 0;
	74	return 1;
	75	}
	76
59284cb4	77	static int pnpacpi_get_resources(struct pnp_dev *dev)
1da177e4	78	{
2f53432c	79	pnp_dbg(&dev->dev, "get resources\n");
d152cf5d	80	return pnpacpi_parse_allocated_resource(dev);
1da177e4 LT	81	}
1da177e4 LT	82
59284cb4	83	static int pnpacpi_set_resources(struct pnp_dev *dev)
1da177e4	84	{
cc8e7a35 RW	85	struct acpi_device *acpi_dev;
cc8e7a35 RW	86	acpi_handle handle;
1da177e4	87	struct acpi_buffer buffer;
cdef6254	88	int ret;
1da177e4	89
2f53432c	90	pnp_dbg(&dev->dev, "set resources\n");
cc8e7a35 RW	91
cc8e7a35 RW	92	handle = DEVICE_ACPI_HANDLE(&dev->dev);
cfc57557	93	if (!handle \|\| acpi_bus_get_device(handle, &acpi_dev)) {
cc8e7a35 RW	94	dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__);
	95	return -ENODEV;
	96	}
	97
a6b5e88c RW	98	if (WARN_ON_ONCE(acpi_dev != dev->data))
	99	dev->data = acpi_dev;
	100
cdef6254	101	ret = pnpacpi_build_resource_template(dev, &buffer);
1da177e4 LT	102	if (ret)
1da177e4 LT	103	return ret;
4ab55d8d	104	ret = pnpacpi_encode_resources(dev, &buffer);
1da177e4 LT	105	if (ret) {
	106	kfree(buffer.pointer);
	107	return ret;
	108	}
6328a574	109	if (ACPI_FAILURE(acpi_set_current_resources(handle, &buffer)))
1da177e4	110	ret = -EINVAL;
6328a574 WS	111	else if (acpi_bus_power_manageable(handle))
6328a574 WS	112	ret = acpi_bus_set_power(handle, ACPI_STATE_D0);
1da177e4 LT	113	kfree(buffer.pointer);
	114	return ret;
	115	}
	116
	117	static int pnpacpi_disable_resources(struct pnp_dev *dev)
	118	{
cc8e7a35 RW	119	struct acpi_device *acpi_dev;
cc8e7a35 RW	120	acpi_handle handle;
6328a574 WS	121	int ret;
	122
	123	dev_dbg(&dev->dev, "disable resources\n");
55955aad	124
cc8e7a35	125	handle = DEVICE_ACPI_HANDLE(&dev->dev);
cfc57557	126	if (!handle \|\| acpi_bus_get_device(handle, &acpi_dev)) {
cc8e7a35 RW	127	dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__);
	128	return 0;
	129	}
	130
1da177e4	131	/* acpi_unregister_gsi(pnp_irq(dev, 0)); */
6328a574	132	ret = 0;
19bde778	133	if (acpi_bus_power_manageable(handle))
8ad928d5	134	acpi_bus_set_power(handle, ACPI_STATE_D3_COLD);
19bde778	135	/* continue even if acpi_bus_set_power() fails */
6328a574 WS	136	if (ACPI_FAILURE(acpi_evaluate_object(handle, "_DIS", NULL, NULL)))
	137	ret = -ENODEV;
	138	return ret;
1da177e4 LT	139	}
1da177e4 LT	140
673d5b43	141	#ifdef CONFIG_ACPI_SLEEP
b14e033e AS	142	static bool pnpacpi_can_wakeup(struct pnp_dev *dev)
b14e033e AS	143	{
cc8e7a35 RW	144	struct acpi_device *acpi_dev;
	145	acpi_handle handle;
	146
	147	handle = DEVICE_ACPI_HANDLE(&dev->dev);
cfc57557	148	if (!handle \|\| acpi_bus_get_device(handle, &acpi_dev)) {
cc8e7a35 RW	149	dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__);
	150	return false;
	151	}
b14e033e AS	152
	153	return acpi_bus_can_wakeup(handle);
	154	}
	155
fc30e68e SL	156	static int pnpacpi_suspend(struct pnp_dev *dev, pm_message_t state)
fc30e68e SL	157	{
cc8e7a35 RW	158	struct acpi_device *acpi_dev;
	159	acpi_handle handle;
	160	int error = 0;
	161
	162	handle = DEVICE_ACPI_HANDLE(&dev->dev);
cfc57557	163	if (!handle \|\| acpi_bus_get_device(handle, &acpi_dev)) {
cc8e7a35 RW	164	dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__);
	165	return 0;
	166	}
36e02b62	167
b14e033e	168	if (device_can_wakeup(&dev->dev)) {
cc8e7a35	169	error = acpi_pm_device_sleep_wake(&dev->dev,
b14e033e	170	device_may_wakeup(&dev->dev));
cc8e7a35 RW	171	if (error)
	172	return error;
	173	}
	174
	175	if (acpi_bus_power_manageable(handle)) {
ee85f543	176	int power_state = acpi_pm_device_sleep_state(&dev->dev, NULL,
8ad928d5	177	ACPI_STATE_D3_COLD);
cc8e7a35 RW	178	if (power_state < 0)
cc8e7a35 RW	179	power_state = (state.event == PM_EVENT_ON) ?
8ad928d5	180	ACPI_STATE_D0 : ACPI_STATE_D3_COLD;
cc8e7a35 RW	181
	182	/*
	183	* acpi_bus_set_power() often fails (keyboard port can't be
	184	* powered-down?), and in any case, our return value is ignored
	185	* by pnp_bus_suspend(). Hence we don't revert the wakeup
	186	* setting if the set_power fails.
	187	*/
	188	error = acpi_bus_set_power(handle, power_state);
b14e033e	189	}
cc8e7a35 RW	190
cc8e7a35 RW	191	return error;
fc30e68e SL	192	}
	193
	194	static int pnpacpi_resume(struct pnp_dev *dev)
	195	{
cc8e7a35 RW	196	struct acpi_device *acpi_dev;
	197	acpi_handle handle = DEVICE_ACPI_HANDLE(&dev->dev);
	198	int error = 0;
	199
cfc57557	200	if (!handle \|\| acpi_bus_get_device(handle, &acpi_dev)) {
cc8e7a35 RW	201	dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__);
	202	return -ENODEV;
	203	}
c4da6940	204
b14e033e AS	205	if (device_may_wakeup(&dev->dev))
b14e033e AS	206	acpi_pm_device_sleep_wake(&dev->dev, false);
cc8e7a35 RW	207
	208	if (acpi_bus_power_manageable(handle))
	209	error = acpi_bus_set_power(handle, ACPI_STATE_D0);
	210
	211	return error;
fc30e68e	212	}
673d5b43	213	#endif
fc30e68e	214
9065ce45	215	struct pnp_protocol pnpacpi_protocol = {
07d4e9af BH	216	.name = "Plug and Play ACPI",
	217	.get = pnpacpi_get_resources,
	218	.set = pnpacpi_set_resources,
1da177e4	219	.disable = pnpacpi_disable_resources,
673d5b43	220	#ifdef CONFIG_ACPI_SLEEP
b14e033e	221	.can_wakeup = pnpacpi_can_wakeup,
fc30e68e SL	222	.suspend = pnpacpi_suspend,
fc30e68e SL	223	.resume = pnpacpi_resume,
673d5b43	224	#endif
1da177e4	225	};
9065ce45	226	EXPORT_SYMBOL(pnpacpi_protocol);
1da177e4	227
66c3ec4f	228	static char __init pnpacpi_get_id(struct acpi_device device)
420a0f66 DT	229	{
	230	struct acpi_hardware_id *id;
	231
	232	list_for_each_entry(id, &device->pnp.ids, list) {
	233	if (ispnpidacpi(id->id))
	234	return id->id;
	235	}
	236
	237	return NULL;
	238	}
	239
1da177e4 LT	240	static int __init pnpacpi_add_device(struct acpi_device *device)
	241	{
	242	acpi_handle temp = NULL;
	243	acpi_status status;
1da177e4	244	struct pnp_dev *dev;
420a0f66	245	char *pnpid;
7f47fa6c	246	struct acpi_hardware_id *id;
1da177e4	247
29058753 AH	248	/* Skip devices that are already bound */
	249	if (device->physical_node_count)
	250	return 0;
	251
39a0ad87 ZY	252	/*
	253	* If a PnPacpi device is not present , the device
	254	* driver should not be loaded.
	255	*/
07b0120d	256	status = acpi_get_handle(device->handle, "_CRS", &temp);
420a0f66 DT	257	if (ACPI_FAILURE(status))
	258	return 0;
	259
	260	pnpid = pnpacpi_get_id(device);
	261	if (!pnpid)
	262	return 0;
	263
	264	if (is_exclusive_device(device) \|\| !device->status.present)
1da177e4 LT	265	return 0;
1da177e4 LT	266
420a0f66	267	dev = pnp_alloc_dev(&pnpacpi_protocol, num, pnpid);
bda1e4e5	268	if (!dev)
1da177e4	269	return -ENOMEM;
bda1e4e5	270
c4da6940	271	dev->data = device;
07d4e9af	272	/* .enabled means the device can decode the resources */
1da177e4 LT	273	dev->active = device->status.enabled;
	274	status = acpi_get_handle(device->handle, "_SRS", &temp);
	275	if (ACPI_SUCCESS(status))
	276	dev->capabilities \|= PNP_CONFIGURABLE;
	277	dev->capabilities \|= PNP_READ;
856608ee	278	if (device->flags.dynamic_status && (dev->capabilities & PNP_CONFIGURABLE))
1da177e4 LT	279	dev->capabilities \|= PNP_WRITE;
	280	if (device->flags.removable)
	281	dev->capabilities \|= PNP_REMOVABLE;
	282	status = acpi_get_handle(device->handle, "_DIS", &temp);
	283	if (ACPI_SUCCESS(status))
	284	dev->capabilities \|= PNP_DISABLE;
	285
1da177e4 LT	286	if (strlen(acpi_device_name(device)))
	287	strncpy(dev->name, acpi_device_name(device), sizeof(dev->name));
	288	else
	289	strncpy(dev->name, acpi_device_bid(device), sizeof(dev->name));
	290
d152cf5d BH	291	if (dev->active)
d152cf5d BH	292	pnpacpi_parse_allocated_resource(dev);
1da177e4	293
d152cf5d BH	294	if (dev->capabilities & PNP_CONFIGURABLE)
d152cf5d BH	295	pnpacpi_parse_resource_option_data(dev);
55955aad	296
7f47fa6c	297	list_for_each_entry(id, &device->pnp.ids, list) {
420a0f66	298	if (!strcmp(id->id, pnpid))
7f47fa6c BH	299	continue;
	300	if (!ispnpidacpi(id->id))
	301	continue;
	302	pnp_add_id(dev, id->id);
1da177e4 LT	303	}
	304
	305	/* clear out the damaged flags */
	306	if (!dev->active)
f4490002	307	pnp_init_resources(dev);
1da177e4	308	pnp_add_device(dev);
9dd78466	309	num++;
1da177e4 LT	310
1da177e4 LT	311	return AE_OK;
1da177e4 LT	312	}
	313
	314	static acpi_status __init pnpacpi_add_device_handler(acpi_handle handle,
9dd78466 BH	315	u32 lvl, void *context,
9dd78466 BH	316	void **rv)
1da177e4 LT	317	{
	318	struct acpi_device *device;
	319
	320	if (!acpi_bus_get_device(handle, &device))
	321	pnpacpi_add_device(device);
	322	else
	323	return AE_CTRL_DEPTH;
	324	return AE_OK;
	325	}
	326
55955aad DB	327	static int __init acpi_pnp_match(struct device dev, void _pnp)
55955aad DB	328	{
9dd78466 BH	329	struct acpi_device *acpi = to_acpi_device(dev);
9dd78466 BH	330	struct pnp_dev *pnp = _pnp;
55955aad DB	331
55955aad DB	332	/* true means it matched */
1033f904	333	return !acpi->physical_node_count
ea8d82fd	334	&& compare_pnp_id(pnp->id, acpi_device_hid(acpi));
55955aad DB	335	}
55955aad DB	336
9dd78466	337	static int __init acpi_pnp_find_device(struct device dev, acpi_handle handle)
55955aad	338	{
9dd78466 BH	339	struct device *adev;
9dd78466 BH	340	struct acpi_device *acpi;
55955aad DB	341
55955aad DB	342	adev = bus_find_device(&acpi_bus_type, NULL,
9dd78466	343	to_pnp_dev(dev), acpi_pnp_match);
55955aad DB	344	if (!adev)
	345	return -ENODEV;
	346
	347	acpi = to_acpi_device(adev);
	348	*handle = acpi->handle;
	349	put_device(adev);
	350	return 0;
	351	}
	352
	353	/* complete initialization of a PNPACPI device includes having
	354	* pnpdev->dev.archdata.acpi_handle point to its ACPI sibling.
	355	*/
53540098 RW	356	static bool acpi_pnp_bus_match(struct device *dev)
	357	{
	358	return dev->bus == &pnp_bus_type;
	359	}
	360
55955aad	361	static struct acpi_bus_type __initdata acpi_pnp_bus = {
53540098 RW	362	.name = "PNP",
53540098 RW	363	.match = acpi_pnp_bus_match,
55955aad DB	364	.find_device = acpi_pnp_find_device,
	365	};
	366
1da177e4	367	int pnpacpi_disabled __initdata;
b449f63c	368	static int __init pnpacpi_init(void)
1da177e4 LT	369	{
1da177e4 LT	370	if (acpi_disabled \|\| pnpacpi_disabled) {
c865d2f6	371	printk(KERN_INFO "pnp: PnP ACPI: disabled\n");
1da177e4 LT	372	return 0;
1da177e4 LT	373	}
c865d2f6	374	printk(KERN_INFO "pnp: PnP ACPI init\n");
1da177e4	375	pnp_register_protocol(&pnpacpi_protocol);
55955aad	376	register_acpi_bus_type(&acpi_pnp_bus);
1da177e4	377	acpi_get_devices(NULL, pnpacpi_add_device_handler, NULL, NULL);
c865d2f6	378	printk(KERN_INFO "pnp: PnP ACPI: found %d devices\n", num);
55955aad	379	unregister_acpi_bus_type(&acpi_pnp_bus);
8f81dd14	380	pnp_platform_devices = 1;
1da177e4 LT	381	return 0;
1da177e4 LT	382	}
9dd78466	383
ed458df4	384	fs_initcall(pnpacpi_init);
1da177e4 LT	385
	386	static int __init pnpacpi_setup(char *str)
	387	{
	388	if (str == NULL)
	389	return 1;
	390	if (!strncmp(str, "off", 3))
	391	pnpacpi_disabled = 1;
	392	return 1;
	393	}
9dd78466	394
1da177e4	395	__setup("pnpacpi=", pnpacpi_setup);