[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 <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 MC	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	*/
29b71a1c TR	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 */
	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
	87	static int pnpacpi_get_resources(struct pnp_dev * dev, struct pnp_resource_table * res)
	88	{
	89	acpi_status status;
55955aad	90	status = pnpacpi_parse_allocated_resource((acpi_handle)dev->data,
1da177e4 LT	91	&dev->res);
	92	return ACPI_FAILURE(status) ? -ENODEV : 0;
	93	}
	94
	95	static int pnpacpi_set_resources(struct pnp_dev * dev, struct pnp_resource_table * res)
	96	{
	97	acpi_handle handle = dev->data;
	98	struct acpi_buffer buffer;
	99	int ret = 0;
	100	acpi_status status;
	101
	102	ret = pnpacpi_build_resource_template(handle, &buffer);
	103	if (ret)
	104	return ret;
	105	ret = pnpacpi_encode_resources(res, &buffer);
	106	if (ret) {
	107	kfree(buffer.pointer);
	108	return ret;
	109	}
	110	status = acpi_set_current_resources(handle, &buffer);
	111	if (ACPI_FAILURE(status))
	112	ret = -EINVAL;
	113	kfree(buffer.pointer);
	114	return ret;
	115	}
	116
	117	static int pnpacpi_disable_resources(struct pnp_dev *dev)
	118	{
	119	acpi_status status;
55955aad	120
1da177e4	121	/* acpi_unregister_gsi(pnp_irq(dev, 0)); */
55955aad	122	status = acpi_evaluate_object((acpi_handle)dev->data,
1da177e4 LT	123	"_DIS", NULL, NULL);
	124	return ACPI_FAILURE(status) ? -ENODEV : 0;
	125	}
	126
fc30e68e SL	127	static int pnpacpi_suspend(struct pnp_dev *dev, pm_message_t state)
	128	{
	129	return acpi_bus_set_power((acpi_handle)dev->data,
	130	acpi_pm_device_sleep_state(&dev->dev,
	131	device_may_wakeup(&dev->dev), NULL));
	132	}
	133
	134	static int pnpacpi_resume(struct pnp_dev *dev)
	135	{
	136	return acpi_bus_set_power((acpi_handle)dev->data, ACPI_STATE_D0);
	137	}
	138
b449f63c	139	static struct pnp_protocol pnpacpi_protocol = {
1da177e4 LT	140	.name = "Plug and Play ACPI",
	141	.get = pnpacpi_get_resources,
	142	.set = pnpacpi_set_resources,
	143	.disable = pnpacpi_disable_resources,
fc30e68e SL	144	.suspend = pnpacpi_suspend,
fc30e68e SL	145	.resume = pnpacpi_resume,
1da177e4 LT	146	};
	147
	148	static int __init pnpacpi_add_device(struct acpi_device *device)
	149	{
	150	acpi_handle temp = NULL;
	151	acpi_status status;
	152	struct pnp_id *dev_id;
	153	struct pnp_dev *dev;
	154
07b0120d MC	155	status = acpi_get_handle(device->handle, "_CRS", &temp);
07b0120d MC	156	if (ACPI_FAILURE(status) \|\| !ispnpidacpi(acpi_device_hid(device)) \|\|
1da177e4 LT	157	is_exclusive_device(device))
	158	return 0;
	159
	160	pnp_dbg("ACPI device : hid %s", acpi_device_hid(device));
cd861280	161	dev = kzalloc(sizeof(struct pnp_dev), GFP_KERNEL);
1da177e4 LT	162	if (!dev) {
	163	pnp_err("Out of memory");
	164	return -ENOMEM;
	165	}
	166	dev->data = device->handle;
	167	/* .enabled means if the device can decode the resources */
	168	dev->active = device->status.enabled;
	169	status = acpi_get_handle(device->handle, "_SRS", &temp);
	170	if (ACPI_SUCCESS(status))
	171	dev->capabilities \|= PNP_CONFIGURABLE;
	172	dev->capabilities \|= PNP_READ;
	173	if (device->flags.dynamic_status)
	174	dev->capabilities \|= PNP_WRITE;
	175	if (device->flags.removable)
	176	dev->capabilities \|= PNP_REMOVABLE;
	177	status = acpi_get_handle(device->handle, "_DIS", &temp);
	178	if (ACPI_SUCCESS(status))
	179	dev->capabilities \|= PNP_DISABLE;
	180
	181	dev->protocol = &pnpacpi_protocol;
	182
	183	if (strlen(acpi_device_name(device)))
	184	strncpy(dev->name, acpi_device_name(device), sizeof(dev->name));
	185	else
	186	strncpy(dev->name, acpi_device_bid(device), sizeof(dev->name));
	187
	188	dev->number = num;
55955aad	189
1da177e4	190	/* set the initial values for the PnP device */
cd861280	191	dev_id = kzalloc(sizeof(struct pnp_id), GFP_KERNEL);
1da177e4 LT	192	if (!dev_id)
	193	goto err;
	194	pnpidacpi_to_pnpid(acpi_device_hid(device), dev_id->id);
	195	pnp_add_id(dev_id, dev);
	196
	197	if(dev->active) {
	198	/* parse allocated resource */
	199	status = pnpacpi_parse_allocated_resource(device->handle, &dev->res);
	200	if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) {
	201	pnp_err("PnPACPI: METHOD_NAME__CRS failure for %s", dev_id->id);
	202	goto err1;
	203	}
	204	}
	205
	206	if(dev->capabilities & PNP_CONFIGURABLE) {
55955aad	207	status = pnpacpi_parse_resource_option_data(device->handle,
1da177e4 LT	208	dev);
	209	if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) {
	210	pnp_err("PnPACPI: METHOD_NAME__PRS failure for %s", dev_id->id);
	211	goto err1;
	212	}
	213	}
55955aad	214
1da177e4 LT	215	/* parse compatible ids */
	216	if (device->flags.compatible_ids) {
	217	struct acpi_compatible_id_list *cid_list = device->pnp.cid_list;
	218	int i;
	219
	220	for (i = 0; i < cid_list->count; i++) {
	221	if (!ispnpidacpi(cid_list->id[i].value))
	222	continue;
cd861280	223	dev_id = kzalloc(sizeof(struct pnp_id), GFP_KERNEL);
1da177e4 LT	224	if (!dev_id)
	225	continue;
	226
	227	pnpidacpi_to_pnpid(cid_list->id[i].value, dev_id->id);
	228	pnp_add_id(dev_id, dev);
	229	}
	230	}
	231
	232	/* clear out the damaged flags */
	233	if (!dev->active)
	234	pnp_init_resource_table(&dev->res);
	235	pnp_add_device(dev);
	236	num ++;
	237
	238	return AE_OK;
	239	err1:
	240	kfree(dev_id);
	241	err:
	242	kfree(dev);
	243	return -EINVAL;
	244	}
	245
	246	static acpi_status __init pnpacpi_add_device_handler(acpi_handle handle,
	247	u32 lvl, void context, void *rv)
	248	{
	249	struct acpi_device *device;
	250
	251	if (!acpi_bus_get_device(handle, &device))
	252	pnpacpi_add_device(device);
	253	else
	254	return AE_CTRL_DEPTH;
	255	return AE_OK;
	256	}
	257
55955aad DB	258	static int __init acpi_pnp_match(struct device dev, void _pnp)
	259	{
	260	struct acpi_device *acpi = to_acpi_device(dev);
	261	struct pnp_dev *pnp = _pnp;
	262
	263	/* true means it matched */
	264	return acpi->flags.hardware_id
	265	&& !acpi_get_physical_device(acpi->handle)
	266	&& compare_pnp_id(pnp->id, acpi->pnp.hardware_id);
	267	}
	268
	269	static int __init acpi_pnp_find_device(struct device dev, acpi_handle handle)
	270	{
	271	struct device *adev;
	272	struct acpi_device *acpi;
	273
	274	adev = bus_find_device(&acpi_bus_type, NULL,
	275	to_pnp_dev(dev),
	276	acpi_pnp_match);
	277	if (!adev)
	278	return -ENODEV;
	279
	280	acpi = to_acpi_device(adev);
	281	*handle = acpi->handle;
	282	put_device(adev);
	283	return 0;
	284	}
	285
	286	/* complete initialization of a PNPACPI device includes having
	287	* pnpdev->dev.archdata.acpi_handle point to its ACPI sibling.
	288	*/
	289	static struct acpi_bus_type __initdata acpi_pnp_bus = {
	290	.bus = &pnp_bus_type,
	291	.find_device = acpi_pnp_find_device,
	292	};
	293
1da177e4	294	int pnpacpi_disabled __initdata;
b449f63c	295	static int __init pnpacpi_init(void)
1da177e4 LT	296	{
	297	if (acpi_disabled \|\| pnpacpi_disabled) {
	298	pnp_info("PnP ACPI: disabled");
	299	return 0;
	300	}
	301	pnp_info("PnP ACPI init");
	302	pnp_register_protocol(&pnpacpi_protocol);
55955aad	303	register_acpi_bus_type(&acpi_pnp_bus);
1da177e4 LT	304	acpi_get_devices(NULL, pnpacpi_add_device_handler, NULL, NULL);
1da177e4 LT	305	pnp_info("PnP ACPI: found %d devices", num);
55955aad	306	unregister_acpi_bus_type(&acpi_pnp_bus);
8f81dd14	307	pnp_platform_devices = 1;
1da177e4 LT	308	return 0;
	309	}
	310	subsys_initcall(pnpacpi_init);
	311
	312	static int __init pnpacpi_setup(char *str)
	313	{
	314	if (str == NULL)
	315	return 1;
	316	if (!strncmp(str, "off", 3))
	317	pnpacpi_disabled = 1;
	318	return 1;
	319	}
	320	__setup("pnpacpi=", pnpacpi_setup);
	321
b449f63c	322	#if 0
1da177e4	323	EXPORT_SYMBOL(pnpacpi_protocol);
b449f63c	324	#endif