[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)
{
	struct acpi_device *acpi_dev = dev->data;
	acpi_handle handle = acpi_dev->handle;
	struct acpi_buffer buffer;
	int ret;

	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;
	}
	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 = dev->data;
	acpi_handle handle = acpi_dev->handle;
	int ret;

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

	/* acpi_unregister_gsi(pnp_irq(dev, 0)); */
	ret = 0;
	if (acpi_bus_power_manageable(handle))
		acpi_bus_set_power(handle, ACPI_STATE_D3);
		/* 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 int pnpacpi_suspend(struct pnp_dev *dev, pm_message_t state)
{
	struct acpi_device *acpi_dev = dev->data;
	acpi_handle handle = acpi_dev->handle;
	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(handle, power_state);
}

static int pnpacpi_resume(struct pnp_dev *dev)
{
	struct acpi_device *acpi_dev = dev->data;
	acpi_handle handle = acpi_dev->handle;

	return acpi_bus_set_power(handle, ACPI_STATE_D0);
}
#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
	.suspend = pnpacpi_suspend,
	.resume = pnpacpi_resume,
#endif
};
EXPORT_SYMBOL(pnpacpi_protocol);

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

	/*
	 * 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;
	/* .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, acpi_device_hid(device)))
			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_get_physical_device(acpi->handle)
	    && 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 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
	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>
	6	*
	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	*/
	21
	22	#include <linux/acpi.h>
	23	#include <linux/pnp.h>
	24	#include <linux/mod_devicetable.h>
	25	#include <acpi/acpi_bus.h>
	26
	27	#include "../base.h"
	28	#include "pnpacpi.h"
	29
	30	static int num = 0;
	31
	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	* Finally, only devices that have a CRS method need to be in this list.
	38	*/
	39	static struct acpi_device_id excluded_id_list[] __initdata = {
	40	{"PNP0C09", 0}, /* EC */
	41	{"PNP0C0F", 0}, /* Link device */
	42	{"PNP0000", 0}, /* PIC */
	43	{"PNP0100", 0}, /* Timer */
	44	{"", 0},
	45	};
	46
	47	static inline int __init is_exclusive_device(struct acpi_device *dev)
	48	{
	49	return (!acpi_match_device_ids(dev, excluded_id_list));
	50	}
	51
	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 int pnpacpi_get_resources(struct pnp_dev *dev)
	76	{
	77	pnp_dbg(&dev->dev, "get resources\n");
	78	return pnpacpi_parse_allocated_resource(dev);
	79	}
	80
	81	static int pnpacpi_set_resources(struct pnp_dev *dev)
	82	{
	83	struct acpi_device *acpi_dev = dev->data;
	84	acpi_handle handle = acpi_dev->handle;
	85	struct acpi_buffer buffer;
	86	int ret;
	87
	88	pnp_dbg(&dev->dev, "set resources\n");
	89	ret = pnpacpi_build_resource_template(dev, &buffer);
	90	if (ret)
	91	return ret;
	92	ret = pnpacpi_encode_resources(dev, &buffer);
	93	if (ret) {
	94	kfree(buffer.pointer);
	95	return ret;
	96	}
	97	if (ACPI_FAILURE(acpi_set_current_resources(handle, &buffer)))
	98	ret = -EINVAL;
	99	else if (acpi_bus_power_manageable(handle))
	100	ret = acpi_bus_set_power(handle, ACPI_STATE_D0);
	101	kfree(buffer.pointer);
	102	return ret;
	103	}
	104
	105	static int pnpacpi_disable_resources(struct pnp_dev *dev)
	106	{
	107	struct acpi_device *acpi_dev = dev->data;
	108	acpi_handle handle = acpi_dev->handle;
	109	int ret;
	110
	111	dev_dbg(&dev->dev, "disable resources\n");
	112
	113	/* acpi_unregister_gsi(pnp_irq(dev, 0)); */
	114	ret = 0;
	115	if (acpi_bus_power_manageable(handle))
	116	acpi_bus_set_power(handle, ACPI_STATE_D3);
	117	/* continue even if acpi_bus_set_power() fails */
	118	if (ACPI_FAILURE(acpi_evaluate_object(handle, "_DIS", NULL, NULL)))
	119	ret = -ENODEV;
	120	return ret;
	121	}
	122
	123	#ifdef CONFIG_ACPI_SLEEP
	124	static int pnpacpi_suspend(struct pnp_dev *dev, pm_message_t state)
	125	{
	126	struct acpi_device *acpi_dev = dev->data;
	127	acpi_handle handle = acpi_dev->handle;
	128	int power_state;
	129
	130	power_state = acpi_pm_device_sleep_state(&dev->dev, NULL);
	131	if (power_state < 0)
	132	power_state = (state.event == PM_EVENT_ON) ?
	133	ACPI_STATE_D0 : ACPI_STATE_D3;
	134
	135	return acpi_bus_set_power(handle, power_state);
	136	}
	137
	138	static int pnpacpi_resume(struct pnp_dev *dev)
	139	{
	140	struct acpi_device *acpi_dev = dev->data;
	141	acpi_handle handle = acpi_dev->handle;
	142
	143	return acpi_bus_set_power(handle, ACPI_STATE_D0);
	144	}
	145	#endif
	146
	147	struct pnp_protocol pnpacpi_protocol = {
	148	.name = "Plug and Play ACPI",
	149	.get = pnpacpi_get_resources,
	150	.set = pnpacpi_set_resources,
	151	.disable = pnpacpi_disable_resources,
	152	#ifdef CONFIG_ACPI_SLEEP
	153	.suspend = pnpacpi_suspend,
	154	.resume = pnpacpi_resume,
	155	#endif
	156	};
	157	EXPORT_SYMBOL(pnpacpi_protocol);
	158
	159	static int __init pnpacpi_add_device(struct acpi_device *device)
	160	{
	161	acpi_handle temp = NULL;
	162	acpi_status status;
	163	struct pnp_dev *dev;
	164	struct acpi_hardware_id *id;
	165
	166	/*
	167	* If a PnPacpi device is not present , the device
	168	* driver should not be loaded.
	169	*/
	170	status = acpi_get_handle(device->handle, "_CRS", &temp);
	171	if (ACPI_FAILURE(status) \|\| !ispnpidacpi(acpi_device_hid(device)) \|\|
	172	is_exclusive_device(device) \|\| (!device->status.present))
	173	return 0;
	174
	175	dev = pnp_alloc_dev(&pnpacpi_protocol, num, acpi_device_hid(device));
	176	if (!dev)
	177	return -ENOMEM;
	178
	179	dev->data = device;
	180	/* .enabled means the device can decode the resources */
	181	dev->active = device->status.enabled;
	182	status = acpi_get_handle(device->handle, "_SRS", &temp);
	183	if (ACPI_SUCCESS(status))
	184	dev->capabilities \|= PNP_CONFIGURABLE;
	185	dev->capabilities \|= PNP_READ;
	186	if (device->flags.dynamic_status && (dev->capabilities & PNP_CONFIGURABLE))
	187	dev->capabilities \|= PNP_WRITE;
	188	if (device->flags.removable)
	189	dev->capabilities \|= PNP_REMOVABLE;
	190	status = acpi_get_handle(device->handle, "_DIS", &temp);
	191	if (ACPI_SUCCESS(status))
	192	dev->capabilities \|= PNP_DISABLE;
	193
	194	if (strlen(acpi_device_name(device)))
	195	strncpy(dev->name, acpi_device_name(device), sizeof(dev->name));
	196	else
	197	strncpy(dev->name, acpi_device_bid(device), sizeof(dev->name));
	198
	199	if (dev->active)
	200	pnpacpi_parse_allocated_resource(dev);
	201
	202	if (dev->capabilities & PNP_CONFIGURABLE)
	203	pnpacpi_parse_resource_option_data(dev);
	204
	205	list_for_each_entry(id, &device->pnp.ids, list) {
	206	if (!strcmp(id->id, acpi_device_hid(device)))
	207	continue;
	208	if (!ispnpidacpi(id->id))
	209	continue;
	210	pnp_add_id(dev, id->id);
	211	}
	212
	213	/* clear out the damaged flags */
	214	if (!dev->active)
	215	pnp_init_resources(dev);
	216	pnp_add_device(dev);
	217	num++;
	218
	219	return AE_OK;
	220	}
	221
	222	static acpi_status __init pnpacpi_add_device_handler(acpi_handle handle,
	223	u32 lvl, void *context,
	224	void **rv)
	225	{
	226	struct acpi_device *device;
	227
	228	if (!acpi_bus_get_device(handle, &device))
	229	pnpacpi_add_device(device);
	230	else
	231	return AE_CTRL_DEPTH;
	232	return AE_OK;
	233	}
	234
	235	static int __init acpi_pnp_match(struct device dev, void _pnp)
	236	{
	237	struct acpi_device *acpi = to_acpi_device(dev);
	238	struct pnp_dev *pnp = _pnp;
	239
	240	/* true means it matched */
	241	return !acpi_get_physical_device(acpi->handle)
	242	&& compare_pnp_id(pnp->id, acpi_device_hid(acpi));
	243	}
	244
	245	static int __init acpi_pnp_find_device(struct device dev, acpi_handle handle)
	246	{
	247	struct device *adev;
	248	struct acpi_device *acpi;
	249
	250	adev = bus_find_device(&acpi_bus_type, NULL,
	251	to_pnp_dev(dev), acpi_pnp_match);
	252	if (!adev)
	253	return -ENODEV;
	254
	255	acpi = to_acpi_device(adev);
	256	*handle = acpi->handle;
	257	put_device(adev);
	258	return 0;
	259	}
	260
	261	/* complete initialization of a PNPACPI device includes having
	262	* pnpdev->dev.archdata.acpi_handle point to its ACPI sibling.
	263	*/
	264	static struct acpi_bus_type __initdata acpi_pnp_bus = {
	265	.bus = &pnp_bus_type,
	266	.find_device = acpi_pnp_find_device,
	267	};
	268
	269	int pnpacpi_disabled __initdata;
	270	static int __init pnpacpi_init(void)
	271	{
	272	if (acpi_disabled \|\| pnpacpi_disabled) {
	273	printk(KERN_INFO "pnp: PnP ACPI: disabled\n");
	274	return 0;
	275	}
	276	printk(KERN_INFO "pnp: PnP ACPI init\n");
	277	pnp_register_protocol(&pnpacpi_protocol);
	278	register_acpi_bus_type(&acpi_pnp_bus);
	279	acpi_get_devices(NULL, pnpacpi_add_device_handler, NULL, NULL);
	280	printk(KERN_INFO "pnp: PnP ACPI: found %d devices\n", num);
	281	unregister_acpi_bus_type(&acpi_pnp_bus);
	282	pnp_platform_devices = 1;
	283	return 0;
	284	}
	285
	286	fs_initcall(pnpacpi_init);
	287
	288	static int __init pnpacpi_setup(char *str)
	289	{
	290	if (str == NULL)
	291	return 1;
	292	if (!strncmp(str, "off", 3))
	293	pnpacpi_disabled = 1;
	294	return 1;
	295	}
	296
	297	__setup("pnpacpi=", pnpacpi_setup);