[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/acpi.h>
#include <linux/pnp.h>
#include <acpi/acpi_bus.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 char __initdata excluded_id_list[] =
	"PNP0C09," /* EC */
	"PNP0C0F," /* Link device */
	"PNP0000," /* PIC */
	"PNP0100," /* Timer */
	;
static inline int is_exclusive_device(struct acpi_device *dev)
{
	return (!acpi_match_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 struct pnp_protocol pnpacpi_protocol = {
	.name	= "Plug and Play ACPI",
	.get	= pnpacpi_get_resources,
	.set	= pnpacpi_set_resources,
	.disable = pnpacpi_disable_resources,
};

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