[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 "../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;

	/*
	 * 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) || !ispnpidacpi(acpi_device_hid(device)) ||
	    is_exclusive_device(device) || (!device->status.present))
		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;
}

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
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	26
1692b27b	27	#include "../base.h"
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.
07d4e9af	37	* Finally, only devices that have a CRS method need to be in this list.
c4bb6f5a	38	*/
6bf69b5e	39	static struct acpi_device_id excluded_id_list[] __initdata = {
9dd78466 BH	40	{"PNP0C09", 0}, /* EC */
	41	{"PNP0C0F", 0}, /* Link device */
	42	{"PNP0000", 0}, /* PIC */
	43	{"PNP0100", 0}, /* Timer */
29b71a1c TR	44	{"", 0},
	45	};
	46
9448b0d4	47	static inline int __init is_exclusive_device(struct acpi_device *dev)
1da177e4	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
59284cb4	75	static int pnpacpi_get_resources(struct pnp_dev *dev)
1da177e4	76	{
2f53432c	77	pnp_dbg(&dev->dev, "get resources\n");
d152cf5d	78	return pnpacpi_parse_allocated_resource(dev);
1da177e4 LT	79	}
1da177e4 LT	80
59284cb4	81	static int pnpacpi_set_resources(struct pnp_dev *dev)
1da177e4 LT	82	{
	83	acpi_handle handle = dev->data;
	84	struct acpi_buffer buffer;
cdef6254	85	int ret;
1da177e4 LT	86	acpi_status status;
1da177e4 LT	87
2f53432c	88	pnp_dbg(&dev->dev, "set resources\n");
cdef6254	89	ret = pnpacpi_build_resource_template(dev, &buffer);
1da177e4 LT	90	if (ret)
1da177e4 LT	91	return ret;
4ab55d8d	92	ret = pnpacpi_encode_resources(dev, &buffer);
1da177e4 LT	93	if (ret) {
	94	kfree(buffer.pointer);
	95	return ret;
	96	}
	97	status = acpi_set_current_resources(handle, &buffer);
	98	if (ACPI_FAILURE(status))
	99	ret = -EINVAL;
	100	kfree(buffer.pointer);
	101	return ret;
	102	}
	103
	104	static int pnpacpi_disable_resources(struct pnp_dev *dev)
	105	{
	106	acpi_status status;
55955aad	107
1da177e4	108	/* acpi_unregister_gsi(pnp_irq(dev, 0)); */
9dd78466 BH	109	status = acpi_evaluate_object((acpi_handle) dev->data,
9dd78466 BH	110	"_DIS", NULL, NULL);
1da177e4 LT	111	return ACPI_FAILURE(status) ? -ENODEV : 0;
	112	}
	113
673d5b43	114	#ifdef CONFIG_ACPI_SLEEP
fc30e68e SL	115	static int pnpacpi_suspend(struct pnp_dev *dev, pm_message_t state)
fc30e68e SL	116	{
36e02b62 RW	117	int power_state;
36e02b62 RW	118
2fe2de5f	119	power_state = acpi_pm_device_sleep_state(&dev->dev, NULL);
36e02b62 RW	120	if (power_state < 0)
	121	power_state = (state.event == PM_EVENT_ON) ?
	122	ACPI_STATE_D0 : ACPI_STATE_D3;
	123
	124	return acpi_bus_set_power((acpi_handle) dev->data, power_state);
fc30e68e SL	125	}
	126
	127	static int pnpacpi_resume(struct pnp_dev *dev)
	128	{
9dd78466	129	return acpi_bus_set_power((acpi_handle) dev->data, ACPI_STATE_D0);
fc30e68e	130	}
673d5b43	131	#endif
fc30e68e	132
b449f63c	133	static struct pnp_protocol pnpacpi_protocol = {
07d4e9af BH	134	.name = "Plug and Play ACPI",
	135	.get = pnpacpi_get_resources,
	136	.set = pnpacpi_set_resources,
1da177e4	137	.disable = pnpacpi_disable_resources,
673d5b43	138	#ifdef CONFIG_ACPI_SLEEP
fc30e68e SL	139	.suspend = pnpacpi_suspend,
fc30e68e SL	140	.resume = pnpacpi_resume,
673d5b43	141	#endif
1da177e4 LT	142	};
	143
	144	static int __init pnpacpi_add_device(struct acpi_device *device)
	145	{
	146	acpi_handle temp = NULL;
	147	acpi_status status;
1da177e4 LT	148	struct pnp_dev *dev;
1da177e4 LT	149
39a0ad87 ZY	150	/*
	151	* If a PnPacpi device is not present , the device
	152	* driver should not be loaded.
	153	*/
07b0120d	154	status = acpi_get_handle(device->handle, "_CRS", &temp);
07b0120d	155	if (ACPI_FAILURE(status) \|\| !ispnpidacpi(acpi_device_hid(device)) \|\|
39a0ad87	156	is_exclusive_device(device) \|\| (!device->status.present))
1da177e4 LT	157	return 0;
1da177e4 LT	158
bda1e4e5 BH	159	dev = pnp_alloc_dev(&pnpacpi_protocol, num, acpi_device_hid(device));
bda1e4e5 BH	160	if (!dev)
1da177e4	161	return -ENOMEM;
bda1e4e5	162
1da177e4	163	dev->data = device->handle;
07d4e9af	164	/* .enabled means the device can decode the resources */
1da177e4 LT	165	dev->active = device->status.enabled;
	166	status = acpi_get_handle(device->handle, "_SRS", &temp);
	167	if (ACPI_SUCCESS(status))
	168	dev->capabilities \|= PNP_CONFIGURABLE;
	169	dev->capabilities \|= PNP_READ;
856608ee	170	if (device->flags.dynamic_status && (dev->capabilities & PNP_CONFIGURABLE))
1da177e4 LT	171	dev->capabilities \|= PNP_WRITE;
	172	if (device->flags.removable)
	173	dev->capabilities \|= PNP_REMOVABLE;
	174	status = acpi_get_handle(device->handle, "_DIS", &temp);
	175	if (ACPI_SUCCESS(status))
	176	dev->capabilities \|= PNP_DISABLE;
	177
1da177e4 LT	178	if (strlen(acpi_device_name(device)))
	179	strncpy(dev->name, acpi_device_name(device), sizeof(dev->name));
	180	else
	181	strncpy(dev->name, acpi_device_bid(device), sizeof(dev->name));
	182
d152cf5d BH	183	if (dev->active)
d152cf5d BH	184	pnpacpi_parse_allocated_resource(dev);
1da177e4	185
d152cf5d BH	186	if (dev->capabilities & PNP_CONFIGURABLE)
d152cf5d BH	187	pnpacpi_parse_resource_option_data(dev);
55955aad	188
1da177e4 LT	189	if (device->flags.compatible_ids) {
	190	struct acpi_compatible_id_list *cid_list = device->pnp.cid_list;
	191	int i;
	192
	193	for (i = 0; i < cid_list->count; i++) {
	194	if (!ispnpidacpi(cid_list->id[i].value))
	195	continue;
772defc6	196	pnp_add_id(dev, cid_list->id[i].value);
1da177e4 LT	197	}
	198	}
	199
	200	/* clear out the damaged flags */
	201	if (!dev->active)
f4490002	202	pnp_init_resources(dev);
1da177e4	203	pnp_add_device(dev);
9dd78466	204	num++;
1da177e4 LT	205
1da177e4 LT	206	return AE_OK;
1da177e4 LT	207	}
	208
	209	static acpi_status __init pnpacpi_add_device_handler(acpi_handle handle,
9dd78466 BH	210	u32 lvl, void *context,
9dd78466 BH	211	void **rv)
1da177e4 LT	212	{
	213	struct acpi_device *device;
	214
	215	if (!acpi_bus_get_device(handle, &device))
	216	pnpacpi_add_device(device);
	217	else
	218	return AE_CTRL_DEPTH;
	219	return AE_OK;
	220	}
	221
55955aad DB	222	static int __init acpi_pnp_match(struct device dev, void _pnp)
55955aad DB	223	{
9dd78466 BH	224	struct acpi_device *acpi = to_acpi_device(dev);
9dd78466 BH	225	struct pnp_dev *pnp = _pnp;
55955aad DB	226
	227	/* true means it matched */
	228	return acpi->flags.hardware_id
9dd78466 BH	229	&& !acpi_get_physical_device(acpi->handle)
9dd78466 BH	230	&& compare_pnp_id(pnp->id, acpi->pnp.hardware_id);
55955aad DB	231	}
55955aad DB	232
9dd78466	233	static int __init acpi_pnp_find_device(struct device dev, acpi_handle handle)
55955aad	234	{
9dd78466 BH	235	struct device *adev;
9dd78466 BH	236	struct acpi_device *acpi;
55955aad DB	237
55955aad DB	238	adev = bus_find_device(&acpi_bus_type, NULL,
9dd78466	239	to_pnp_dev(dev), acpi_pnp_match);
55955aad DB	240	if (!adev)
	241	return -ENODEV;
	242
	243	acpi = to_acpi_device(adev);
	244	*handle = acpi->handle;
	245	put_device(adev);
	246	return 0;
	247	}
	248
	249	/* complete initialization of a PNPACPI device includes having
	250	* pnpdev->dev.archdata.acpi_handle point to its ACPI sibling.
	251	*/
	252	static struct acpi_bus_type __initdata acpi_pnp_bus = {
07d4e9af	253	.bus = &pnp_bus_type,
55955aad DB	254	.find_device = acpi_pnp_find_device,
	255	};
	256
1da177e4	257	int pnpacpi_disabled __initdata;
b449f63c	258	static int __init pnpacpi_init(void)
1da177e4 LT	259	{
1da177e4 LT	260	if (acpi_disabled \|\| pnpacpi_disabled) {
c865d2f6	261	printk(KERN_INFO "pnp: PnP ACPI: disabled\n");
1da177e4 LT	262	return 0;
1da177e4 LT	263	}
c865d2f6	264	printk(KERN_INFO "pnp: PnP ACPI init\n");
1da177e4	265	pnp_register_protocol(&pnpacpi_protocol);
55955aad	266	register_acpi_bus_type(&acpi_pnp_bus);
1da177e4	267	acpi_get_devices(NULL, pnpacpi_add_device_handler, NULL, NULL);
c865d2f6	268	printk(KERN_INFO "pnp: PnP ACPI: found %d devices\n", num);
55955aad	269	unregister_acpi_bus_type(&acpi_pnp_bus);
8f81dd14	270	pnp_platform_devices = 1;
1da177e4 LT	271	return 0;
1da177e4 LT	272	}
9dd78466	273
ed458df4	274	fs_initcall(pnpacpi_init);
1da177e4 LT	275
	276	static int __init pnpacpi_setup(char *str)
	277	{
	278	if (str == NULL)
	279	return 1;
	280	if (!strncmp(str, "off", 3))
	281	pnpacpi_disabled = 1;
	282	return 1;
	283	}
9dd78466	284
1da177e4	285	__setup("pnpacpi=", pnpacpi_setup);