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

#include "../base.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.
 * 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 (!('@' <= (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 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)
{
	acpi_handle handle = dev->data;
	struct acpi_buffer buffer;
	int ret;
	acpi_status status;

	pnp_dbg(&dev->dev, "set resources\n");
	ret = pnpacpi_build_resource_template(dev, &buffer);
	if (ret)
		return ret;
	ret = pnpacpi_encode_resources(dev, &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;
}

#ifdef CONFIG_ACPI_SLEEP
static int pnpacpi_suspend(struct pnp_dev *dev, pm_message_t state)
{
	int power_state;

	power_state = acpi_pm_device_sleep_state(&dev->dev, NULL);
	if (power_state < 0)
		power_state = (state.event == PM_EVENT_ON) ?
				ACPI_STATE_D0 : ACPI_STATE_D3;

	return acpi_bus_set_power((acpi_handle) dev->data, power_state);
}

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

static 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
	.suspend = pnpacpi_suspend,
	.resume = pnpacpi_resume,
#endif
};

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

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

	dev->data = device->handle;
	/* .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);

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

	/* 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->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) {
		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;
}

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);
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
1692b27b	28	#include "../base.h"
1da177e4 LT	29	#include "pnpacpi.h"
	30
	31	static int num = 0;
	32
c4bb6f5a	33	/* We need only to blacklist devices that have already an acpi driver that
	34	* can't use pnp layer. We don't need to blacklist device that are directly
	35	* used by the kernel (PCI root, ...), as it is harmless and there were
	36	* already present in pnpbios. But there is an exception for devices that
	37	* have irqs (PIC, Timer) because we call acpi_register_gsi.
07d4e9af	38	* Finally, only devices that have a CRS method need to be in this list.
c4bb6f5a	39	*/
6bf69b5e	40	static struct acpi_device_id excluded_id_list[] __initdata = {
9dd78466 BH	41	{"PNP0C09", 0}, /* EC */
	42	{"PNP0C0F", 0}, /* Link device */
	43	{"PNP0000", 0}, /* PIC */
	44	{"PNP0100", 0}, /* Timer */
29b71a1c TR	45	{"", 0},
	46	};
	47
9448b0d4	48	static inline int __init is_exclusive_device(struct acpi_device *dev)
1da177e4	49	{
29b71a1c	50	return (!acpi_match_device_ids(dev, excluded_id_list));
1da177e4 LT	51	}
1da177e4 LT	52
1da177e4 LT	53	/*
	54	* Compatible Device IDs
	55	*/
	56	#define TEST_HEX(c) \
	57	if (!(('0' <= (c) && (c) <= '9') \|\| ('A' <= (c) && (c) <= 'F'))) \
	58	return 0
	59	#define TEST_ALPHA(c) \
	60	if (!('@' <= (c) \|\| (c) <= 'Z')) \
	61	return 0
	62	static int __init ispnpidacpi(char *id)
	63	{
	64	TEST_ALPHA(id[0]);
	65	TEST_ALPHA(id[1]);
	66	TEST_ALPHA(id[2]);
	67	TEST_HEX(id[3]);
	68	TEST_HEX(id[4]);
	69	TEST_HEX(id[5]);
	70	TEST_HEX(id[6]);
	71	if (id[7] != '\0')
	72	return 0;
	73	return 1;
	74	}
	75
59284cb4	76	static int pnpacpi_get_resources(struct pnp_dev *dev)
1da177e4	77	{
2f53432c	78	pnp_dbg(&dev->dev, "get resources\n");
d152cf5d	79	return pnpacpi_parse_allocated_resource(dev);
1da177e4 LT	80	}
1da177e4 LT	81
59284cb4	82	static int pnpacpi_set_resources(struct pnp_dev *dev)
1da177e4 LT	83	{
	84	acpi_handle handle = dev->data;
	85	struct acpi_buffer buffer;
cdef6254	86	int ret;
1da177e4 LT	87	acpi_status status;
1da177e4 LT	88
2f53432c	89	pnp_dbg(&dev->dev, "set resources\n");
cdef6254	90	ret = pnpacpi_build_resource_template(dev, &buffer);
1da177e4 LT	91	if (ret)
1da177e4 LT	92	return ret;
4ab55d8d	93	ret = pnpacpi_encode_resources(dev, &buffer);
1da177e4 LT	94	if (ret) {
	95	kfree(buffer.pointer);
	96	return ret;
	97	}
	98	status = acpi_set_current_resources(handle, &buffer);
	99	if (ACPI_FAILURE(status))
	100	ret = -EINVAL;
	101	kfree(buffer.pointer);
	102	return ret;
	103	}
	104
	105	static int pnpacpi_disable_resources(struct pnp_dev *dev)
	106	{
	107	acpi_status status;
55955aad	108
1da177e4	109	/* acpi_unregister_gsi(pnp_irq(dev, 0)); */
9dd78466 BH	110	status = acpi_evaluate_object((acpi_handle) dev->data,
9dd78466 BH	111	"_DIS", NULL, NULL);
1da177e4 LT	112	return ACPI_FAILURE(status) ? -ENODEV : 0;
	113	}
	114
673d5b43	115	#ifdef CONFIG_ACPI_SLEEP
fc30e68e SL	116	static int pnpacpi_suspend(struct pnp_dev *dev, pm_message_t state)
fc30e68e SL	117	{
36e02b62 RW	118	int power_state;
36e02b62 RW	119
2fe2de5f	120	power_state = acpi_pm_device_sleep_state(&dev->dev, NULL);
36e02b62 RW	121	if (power_state < 0)
	122	power_state = (state.event == PM_EVENT_ON) ?
	123	ACPI_STATE_D0 : ACPI_STATE_D3;
	124
	125	return acpi_bus_set_power((acpi_handle) dev->data, power_state);
fc30e68e SL	126	}
	127
	128	static int pnpacpi_resume(struct pnp_dev *dev)
	129	{
9dd78466	130	return acpi_bus_set_power((acpi_handle) dev->data, ACPI_STATE_D0);
fc30e68e	131	}
673d5b43	132	#endif
fc30e68e	133
b449f63c	134	static struct pnp_protocol pnpacpi_protocol = {
07d4e9af BH	135	.name = "Plug and Play ACPI",
	136	.get = pnpacpi_get_resources,
	137	.set = pnpacpi_set_resources,
1da177e4	138	.disable = pnpacpi_disable_resources,
673d5b43	139	#ifdef CONFIG_ACPI_SLEEP
fc30e68e SL	140	.suspend = pnpacpi_suspend,
fc30e68e SL	141	.resume = pnpacpi_resume,
673d5b43	142	#endif
1da177e4 LT	143	};
	144
	145	static int __init pnpacpi_add_device(struct acpi_device *device)
	146	{
	147	acpi_handle temp = NULL;
	148	acpi_status status;
1da177e4 LT	149	struct pnp_dev *dev;
1da177e4 LT	150
07b0120d	151	status = acpi_get_handle(device->handle, "_CRS", &temp);
07b0120d	152	if (ACPI_FAILURE(status) \|\| !ispnpidacpi(acpi_device_hid(device)) \|\|
9dd78466	153	is_exclusive_device(device))
1da177e4 LT	154	return 0;
1da177e4 LT	155
bda1e4e5 BH	156	dev = pnp_alloc_dev(&pnpacpi_protocol, num, acpi_device_hid(device));
bda1e4e5 BH	157	if (!dev)
1da177e4	158	return -ENOMEM;
bda1e4e5	159
1da177e4	160	dev->data = device->handle;
07d4e9af	161	/* .enabled means the device can decode the resources */
1da177e4 LT	162	dev->active = device->status.enabled;
	163	status = acpi_get_handle(device->handle, "_SRS", &temp);
	164	if (ACPI_SUCCESS(status))
	165	dev->capabilities \|= PNP_CONFIGURABLE;
	166	dev->capabilities \|= PNP_READ;
856608ee	167	if (device->flags.dynamic_status && (dev->capabilities & PNP_CONFIGURABLE))
1da177e4 LT	168	dev->capabilities \|= PNP_WRITE;
	169	if (device->flags.removable)
	170	dev->capabilities \|= PNP_REMOVABLE;
	171	status = acpi_get_handle(device->handle, "_DIS", &temp);
	172	if (ACPI_SUCCESS(status))
	173	dev->capabilities \|= PNP_DISABLE;
	174
1da177e4 LT	175	if (strlen(acpi_device_name(device)))
	176	strncpy(dev->name, acpi_device_name(device), sizeof(dev->name));
	177	else
	178	strncpy(dev->name, acpi_device_bid(device), sizeof(dev->name));
	179
d152cf5d BH	180	if (dev->active)
d152cf5d BH	181	pnpacpi_parse_allocated_resource(dev);
1da177e4	182
d152cf5d BH	183	if (dev->capabilities & PNP_CONFIGURABLE)
d152cf5d BH	184	pnpacpi_parse_resource_option_data(dev);
55955aad	185
1da177e4 LT	186	if (device->flags.compatible_ids) {
	187	struct acpi_compatible_id_list *cid_list = device->pnp.cid_list;
	188	int i;
	189
	190	for (i = 0; i < cid_list->count; i++) {
	191	if (!ispnpidacpi(cid_list->id[i].value))
	192	continue;
772defc6	193	pnp_add_id(dev, cid_list->id[i].value);
1da177e4 LT	194	}
	195	}
	196
	197	/* clear out the damaged flags */
	198	if (!dev->active)
f4490002	199	pnp_init_resources(dev);
1da177e4	200	pnp_add_device(dev);
9dd78466	201	num++;
1da177e4 LT	202
1da177e4 LT	203	return AE_OK;
1da177e4 LT	204	}
	205
	206	static acpi_status __init pnpacpi_add_device_handler(acpi_handle handle,
9dd78466 BH	207	u32 lvl, void *context,
9dd78466 BH	208	void **rv)
1da177e4 LT	209	{
	210	struct acpi_device *device;
	211
	212	if (!acpi_bus_get_device(handle, &device))
	213	pnpacpi_add_device(device);
	214	else
	215	return AE_CTRL_DEPTH;
	216	return AE_OK;
	217	}
	218
55955aad DB	219	static int __init acpi_pnp_match(struct device dev, void _pnp)
55955aad DB	220	{
9dd78466 BH	221	struct acpi_device *acpi = to_acpi_device(dev);
9dd78466 BH	222	struct pnp_dev *pnp = _pnp;
55955aad DB	223
	224	/* true means it matched */
	225	return acpi->flags.hardware_id
9dd78466 BH	226	&& !acpi_get_physical_device(acpi->handle)
9dd78466 BH	227	&& compare_pnp_id(pnp->id, acpi->pnp.hardware_id);
55955aad DB	228	}
55955aad DB	229
9dd78466	230	static int __init acpi_pnp_find_device(struct device dev, acpi_handle handle)
55955aad	231	{
9dd78466 BH	232	struct device *adev;
9dd78466 BH	233	struct acpi_device *acpi;
55955aad DB	234
55955aad DB	235	adev = bus_find_device(&acpi_bus_type, NULL,
9dd78466	236	to_pnp_dev(dev), acpi_pnp_match);
55955aad DB	237	if (!adev)
	238	return -ENODEV;
	239
	240	acpi = to_acpi_device(adev);
	241	*handle = acpi->handle;
	242	put_device(adev);
	243	return 0;
	244	}
	245
	246	/* complete initialization of a PNPACPI device includes having
	247	* pnpdev->dev.archdata.acpi_handle point to its ACPI sibling.
	248	*/
	249	static struct acpi_bus_type __initdata acpi_pnp_bus = {
07d4e9af	250	.bus = &pnp_bus_type,
55955aad DB	251	.find_device = acpi_pnp_find_device,
	252	};
	253
1da177e4	254	int pnpacpi_disabled __initdata;
b449f63c	255	static int __init pnpacpi_init(void)
1da177e4 LT	256	{
1da177e4 LT	257	if (acpi_disabled \|\| pnpacpi_disabled) {
c865d2f6	258	printk(KERN_INFO "pnp: PnP ACPI: disabled\n");
1da177e4 LT	259	return 0;
1da177e4 LT	260	}
c865d2f6	261	printk(KERN_INFO "pnp: PnP ACPI init\n");
1da177e4	262	pnp_register_protocol(&pnpacpi_protocol);
55955aad	263	register_acpi_bus_type(&acpi_pnp_bus);
1da177e4	264	acpi_get_devices(NULL, pnpacpi_add_device_handler, NULL, NULL);
c865d2f6	265	printk(KERN_INFO "pnp: PnP ACPI: found %d devices\n", num);
55955aad	266	unregister_acpi_bus_type(&acpi_pnp_bus);
8f81dd14	267	pnp_platform_devices = 1;
1da177e4 LT	268	return 0;
1da177e4 LT	269	}
9dd78466	270
1da177e4 LT	271	subsys_initcall(pnpacpi_init);
	272
	273	static int __init pnpacpi_setup(char *str)
	274	{
	275	if (str == NULL)
	276	return 1;
	277	if (!strncmp(str, "off", 3))
	278	pnpacpi_disabled = 1;
	279	return 1;
	280	}
9dd78466	281
1da177e4	282	__setup("pnpacpi=", pnpacpi_setup);