[deliverable/linux.git] / drivers / platform / x86 / ideapad_acpi.c

/*
 *  ideapad_acpi.c - Lenovo IdeaPad ACPI Extras
 *
 *  Copyright © 2010 Intel Corporation
 *  Copyright © 2010 David Woodhouse <dwmw2@infradead.org>
 *
 *  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 of the License, 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., 51 Franklin Street, Fifth Floor, Boston, MA
 *  02110-1301, USA.
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>
#include <linux/rfkill.h>

#define IDEAPAD_DEV_CAMERA	0
#define IDEAPAD_DEV_WLAN	1
#define IDEAPAD_DEV_BLUETOOTH	2
#define IDEAPAD_DEV_3G		3
#define IDEAPAD_DEV_KILLSW	4

struct ideapad_private {
	struct rfkill *rfk[5];
};

static struct {
	char *name;
	int cfgbit;
	int type;
} ideapad_rfk_data[] = {
	{ "ideapad_camera",	19, NUM_RFKILL_TYPES },
	{ "ideapad_wlan",	18, RFKILL_TYPE_WLAN },
	{ "ideapad_bluetooth",	16, RFKILL_TYPE_BLUETOOTH },
	{ "ideapad_3g",		17, RFKILL_TYPE_WWAN },
	{ "ideapad_killsw",	0, RFKILL_TYPE_WLAN }
};

/*
 * ACPI Helpers
 */
#define IDEAPAD_EC_TIMEOUT (100) /* in ms */

static int read_method_int(acpi_handle handle, const char *method, int *val)
{
	acpi_status status;
	unsigned long long result;

	status = acpi_evaluate_integer(handle, (char *)method, NULL, &result);
	if (ACPI_FAILURE(status)) {
		*val = -1;
		return -1;
	} else {
		*val = result;
		return 0;
	}
}

static int method_vpcr(acpi_handle handle, int cmd, int *ret)
{
	acpi_status status;
	unsigned long long result;
	struct acpi_object_list params;
	union acpi_object in_obj;

	params.count = 1;
	params.pointer = &in_obj;
	in_obj.type = ACPI_TYPE_INTEGER;
	in_obj.integer.value = cmd;

	status = acpi_evaluate_integer(handle, "VPCR", &params, &result);

	if (ACPI_FAILURE(status)) {
		*ret = -1;
		return -1;
	} else {
		*ret = result;
		return 0;
	}
}

static int method_vpcw(acpi_handle handle, int cmd, int data)
{
	struct acpi_object_list params;
	union acpi_object in_obj[2];
	acpi_status status;

	params.count = 2;
	params.pointer = in_obj;
	in_obj[0].type = ACPI_TYPE_INTEGER;
	in_obj[0].integer.value = cmd;
	in_obj[1].type = ACPI_TYPE_INTEGER;
	in_obj[1].integer.value = data;

	status = acpi_evaluate_object(handle, "VPCW", &params, NULL);
	if (status != AE_OK)
		return -1;
	return 0;
}

static int read_ec_data(acpi_handle handle, int cmd, unsigned long *data)
{
	int val;
	unsigned long int end_jiffies;

	if (method_vpcw(handle, 1, cmd))
		return -1;

	for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
	     time_before(jiffies, end_jiffies);) {
		schedule();
		if (method_vpcr(handle, 1, &val))
			return -1;
		if (val == 0) {
			if (method_vpcr(handle, 0, &val))
				return -1;
			*data = val;
			return 0;
		}
	}
	pr_err("timeout in read_ec_cmd\n");
	return -1;
}

static int write_ec_cmd(acpi_handle handle, int cmd, unsigned long data)
{
	int val;
	unsigned long int end_jiffies;

	if (method_vpcw(handle, 0, data))
		return -1;
	if (method_vpcw(handle, 1, cmd))
		return -1;

	for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
	     time_before(jiffies, end_jiffies);) {
		schedule();
		if (method_vpcr(handle, 1, &val))
			return -1;
		if (val == 0)
			return 0;
	}
	pr_err("timeout in write_ec_cmd\n");
	return -1;
}
/* the above is ACPI helpers */

static int ideapad_dev_get_state(int device)
{
	acpi_status status;
	union acpi_object in_param;
	struct acpi_object_list input = { 1, &in_param };
	struct acpi_buffer output;
	union acpi_object out_obj;

	output.length = sizeof(out_obj);
	output.pointer = &out_obj;

	in_param.type = ACPI_TYPE_INTEGER;
	in_param.integer.value = device + 1;

	status = acpi_evaluate_object(NULL, "\\_SB_.GECN", &input, &output);
	if (ACPI_FAILURE(status)) {
		printk(KERN_WARNING "IdeaPAD \\_SB_.GECN method failed %d\n", status);
		return -ENODEV;
	}
	if (out_obj.type != ACPI_TYPE_INTEGER) {
		printk(KERN_WARNING "IdeaPAD \\_SB_.GECN method returned unexpected type\n");
		return -ENODEV;
	}
	return out_obj.integer.value;
}

static int ideapad_dev_set_state(int device, int state)
{
	acpi_status status;
	union acpi_object in_params[2];
	struct acpi_object_list input = { 2, in_params };

	in_params[0].type = ACPI_TYPE_INTEGER;
	in_params[0].integer.value = device + 1;
	in_params[1].type = ACPI_TYPE_INTEGER;
	in_params[1].integer.value = state;

	status = acpi_evaluate_object(NULL, "\\_SB_.SECN", &input, NULL);
	if (ACPI_FAILURE(status)) {
		printk(KERN_WARNING "IdeaPAD \\_SB_.SECN method failed %d\n", status);
		return -ENODEV;
	}
	return 0;
}
static ssize_t show_ideapad_cam(struct device *dev,
				struct device_attribute *attr,
				char *buf)
{
	int state = ideapad_dev_get_state(IDEAPAD_DEV_CAMERA);
	if (state < 0)
		return state;

	return sprintf(buf, "%d\n", state);
}

static ssize_t store_ideapad_cam(struct device *dev,
				 struct device_attribute *attr,
				 const char *buf, size_t count)
{
	int ret, state;

	if (!count)
		return 0;
	if (sscanf(buf, "%i", &state) != 1)
		return -EINVAL;
	ret = ideapad_dev_set_state(IDEAPAD_DEV_CAMERA, !!state);
	if (ret < 0)
		return ret;
	return count;
}

static DEVICE_ATTR(camera_power, 0644, show_ideapad_cam, store_ideapad_cam);

static int ideapad_rfk_set(void *data, bool blocked)
{
	int device = (unsigned long)data;

	if (device == IDEAPAD_DEV_KILLSW)
		return -EINVAL;
	return ideapad_dev_set_state(device, !blocked);
}

static struct rfkill_ops ideapad_rfk_ops = {
	.set_block = ideapad_rfk_set,
};

static void ideapad_sync_rfk_state(struct acpi_device *adevice)
{
	struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
	int hw_blocked = !ideapad_dev_get_state(IDEAPAD_DEV_KILLSW);
	int i;

	rfkill_set_hw_state(priv->rfk[IDEAPAD_DEV_KILLSW], hw_blocked);
	for (i = IDEAPAD_DEV_WLAN; i < IDEAPAD_DEV_KILLSW; i++)
		if (priv->rfk[i])
			rfkill_set_hw_state(priv->rfk[i], hw_blocked);
	if (hw_blocked)
		return;

	for (i = IDEAPAD_DEV_WLAN; i < IDEAPAD_DEV_KILLSW; i++)
		if (priv->rfk[i])
			rfkill_set_sw_state(priv->rfk[i], !ideapad_dev_get_state(i));
}

static int ideapad_register_rfkill(struct acpi_device *adevice, int dev)
{
	struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
	int ret;

	priv->rfk[dev] = rfkill_alloc(ideapad_rfk_data[dev-1].name, &adevice->dev,
				      ideapad_rfk_data[dev-1].type, &ideapad_rfk_ops,
				      (void *)(long)dev);
	if (!priv->rfk[dev])
		return -ENOMEM;

	ret = rfkill_register(priv->rfk[dev]);
	if (ret) {
		rfkill_destroy(priv->rfk[dev]);
		return ret;
	}
	return 0;
}

static void ideapad_unregister_rfkill(struct acpi_device *adevice, int dev)
{
	struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);

	if (!priv->rfk[dev])
		return;

	rfkill_unregister(priv->rfk[dev]);
	rfkill_destroy(priv->rfk[dev]);
}

static const struct acpi_device_id ideapad_device_ids[] = {
	{ "VPC2004", 0},
	{ "", 0},
};
MODULE_DEVICE_TABLE(acpi, ideapad_device_ids);

static int ideapad_acpi_add(struct acpi_device *adevice)
{
	int i, cfg;
	int devs_present[5];
	struct ideapad_private *priv;

	if (read_method_int(adevice->handle, "_CFG", &cfg))
		return -ENODEV;

	for (i = IDEAPAD_DEV_CAMERA; i < IDEAPAD_DEV_KILLSW; i++) {
		if (test_bit(ideapad_rfk_data[i].cfgbit, (unsigned long *)&cfg))
			devs_present[i] = 1;
		else
			devs_present[i] = 0;
	}

	/* The hardware switch is always present */
	devs_present[IDEAPAD_DEV_KILLSW] = 1;

	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
	if (!priv)
		return -ENOMEM;

	if (devs_present[IDEAPAD_DEV_CAMERA]) {
		int ret = device_create_file(&adevice->dev, &dev_attr_camera_power);
		if (ret) {
			kfree(priv);
			return ret;
		}
	}

	dev_set_drvdata(&adevice->dev, priv);
	for (i = IDEAPAD_DEV_WLAN; i <= IDEAPAD_DEV_KILLSW; i++) {
		if (!devs_present[i])
			continue;

		ideapad_register_rfkill(adevice, i);
	}
	ideapad_sync_rfk_state(adevice);
	return 0;
}

static int ideapad_acpi_remove(struct acpi_device *adevice, int type)
{
	struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
	int i;

	device_remove_file(&adevice->dev, &dev_attr_camera_power);

	for (i = IDEAPAD_DEV_WLAN; i <= IDEAPAD_DEV_KILLSW; i++)
		ideapad_unregister_rfkill(adevice, i);

	dev_set_drvdata(&adevice->dev, NULL);
	kfree(priv);
	return 0;
}

static void ideapad_acpi_notify(struct acpi_device *adevice, u32 event)
{
	acpi_handle handle = adevice->handle;
	unsigned long vpc1, vpc2, vpc_bit;

	if (read_ec_data(handle, 0x10, &vpc1))
		return;
	if (read_ec_data(handle, 0x1A, &vpc2))
		return;

	vpc1 = (vpc2 << 8) | vpc1;
	for (vpc_bit = 0; vpc_bit < 16; vpc_bit++) {
		if (test_bit(vpc_bit, &vpc1)) {
			if (vpc_bit == 9)
				ideapad_sync_rfk_state(adevice);
		}
	}
}

static struct acpi_driver ideapad_acpi_driver = {
	.name = "ideapad_acpi",
	.class = "IdeaPad",
	.ids = ideapad_device_ids,
	.ops.add = ideapad_acpi_add,
	.ops.remove = ideapad_acpi_remove,
	.ops.notify = ideapad_acpi_notify,
	.owner = THIS_MODULE,
};


static int __init ideapad_acpi_module_init(void)
{
	acpi_bus_register_driver(&ideapad_acpi_driver);

	return 0;
}


static void __exit ideapad_acpi_module_exit(void)
{
	acpi_bus_unregister_driver(&ideapad_acpi_driver);

}

MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
MODULE_DESCRIPTION("IdeaPad ACPI Extras");
MODULE_LICENSE("GPL");

module_init(ideapad_acpi_module_init);
module_exit(ideapad_acpi_module_exit);
Commit	Line	Data
58ac7aa0 DW	1	/*
	2	* ideapad_acpi.c - Lenovo IdeaPad ACPI Extras
	3	*
	4	* Copyright © 2010 Intel Corporation
	5	* Copyright © 2010 David Woodhouse <dwmw2@infradead.org>
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation; either version 2 of the License, or
	10	* (at your option) any later version.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU 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., 51 Franklin Street, Fifth Floor, Boston, MA
	20	* 02110-1301, USA.
	21	*/
	22
	23	#include <linux/kernel.h>
	24	#include <linux/module.h>
	25	#include <linux/init.h>
	26	#include <linux/types.h>
	27	#include <acpi/acpi_bus.h>
	28	#include <acpi/acpi_drivers.h>
	29	#include <linux/rfkill.h>
	30
	31	#define IDEAPAD_DEV_CAMERA 0
	32	#define IDEAPAD_DEV_WLAN 1
	33	#define IDEAPAD_DEV_BLUETOOTH 2
	34	#define IDEAPAD_DEV_3G 3
	35	#define IDEAPAD_DEV_KILLSW 4
	36
ce326329 DW	37	struct ideapad_private {
ce326329 DW	38	struct rfkill *rfk[5];
58ac7aa0	39	};
ce326329 DW	40
	41	static struct {
	42	char *name;
dfa7f6fe	43	int cfgbit;
ce326329 DW	44	int type;
ce326329 DW	45	} ideapad_rfk_data[] = {
dfa7f6fe IP	46	{ "ideapad_camera", 19, NUM_RFKILL_TYPES },
	47	{ "ideapad_wlan", 18, RFKILL_TYPE_WLAN },
	48	{ "ideapad_bluetooth", 16, RFKILL_TYPE_BLUETOOTH },
	49	{ "ideapad_3g", 17, RFKILL_TYPE_WWAN },
	50	{ "ideapad_killsw", 0, RFKILL_TYPE_WLAN }
58ac7aa0 DW	51	};
58ac7aa0 DW	52
6a09f21d IP	53	/*
	54	* ACPI Helpers
	55	*/
	56	#define IDEAPAD_EC_TIMEOUT (100) /* in ms */
	57
	58	static int read_method_int(acpi_handle handle, const char method, int val)
	59	{
	60	acpi_status status;
	61	unsigned long long result;
	62
	63	status = acpi_evaluate_integer(handle, (char *)method, NULL, &result);
	64	if (ACPI_FAILURE(status)) {
	65	*val = -1;
	66	return -1;
	67	} else {
	68	*val = result;
	69	return 0;
	70	}
	71	}
	72
	73	static int method_vpcr(acpi_handle handle, int cmd, int *ret)
	74	{
	75	acpi_status status;
	76	unsigned long long result;
	77	struct acpi_object_list params;
	78	union acpi_object in_obj;
	79
	80	params.count = 1;
	81	params.pointer = &in_obj;
	82	in_obj.type = ACPI_TYPE_INTEGER;
	83	in_obj.integer.value = cmd;
	84
	85	status = acpi_evaluate_integer(handle, "VPCR", &params, &result);
	86
	87	if (ACPI_FAILURE(status)) {
	88	*ret = -1;
	89	return -1;
	90	} else {
	91	*ret = result;
	92	return 0;
	93	}
	94	}
	95
	96	static int method_vpcw(acpi_handle handle, int cmd, int data)
	97	{
	98	struct acpi_object_list params;
	99	union acpi_object in_obj[2];
	100	acpi_status status;
	101
	102	params.count = 2;
	103	params.pointer = in_obj;
	104	in_obj[0].type = ACPI_TYPE_INTEGER;
	105	in_obj[0].integer.value = cmd;
	106	in_obj[1].type = ACPI_TYPE_INTEGER;
	107	in_obj[1].integer.value = data;
	108
	109	status = acpi_evaluate_object(handle, "VPCW", &params, NULL);
	110	if (status != AE_OK)
	111	return -1;
	112	return 0;
	113	}
	114
	115	static int read_ec_data(acpi_handle handle, int cmd, unsigned long *data)
	116	{
117	int val;
118	unsigned long int end_jiffies;
119
120	if (method_vpcw(handle, 1, cmd))
121	return -1;
122
123	for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
124	time_before(jiffies, end_jiffies);) {
125	schedule();
126	if (method_vpcr(handle, 1, &val))
127	return -1;
128	if (val == 0) {
129	if (method_vpcr(handle, 0, &val))
130	return -1;
131	*data = val;
132	return 0;
133	}
134	}
135	pr_err("timeout in read_ec_cmd\n");
136	return -1;
137	}
138
139	static int write_ec_cmd(acpi_handle handle, int cmd, unsigned long data)
140	{
141	int val;
142	unsigned long int end_jiffies;
143
144	if (method_vpcw(handle, 0, data))
145	return -1;
146	if (method_vpcw(handle, 1, cmd))
147	return -1;
148
149	for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
150	time_before(jiffies, end_jiffies);) {
151	schedule();
152	if (method_vpcr(handle, 1, &val))
153	return -1;
154	if (val == 0)
155	return 0;
156	}
157	pr_err("timeout in write_ec_cmd\n");
158	return -1;
159	}
160	/* the above is ACPI helpers */
161
58ac7aa0 DW	162	static int ideapad_dev_get_state(int device)
	163	{
	164	acpi_status status;
	165	union acpi_object in_param;
	166	struct acpi_object_list input = { 1, &in_param };
	167	struct acpi_buffer output;
	168	union acpi_object out_obj;
	169
	170	output.length = sizeof(out_obj);
	171	output.pointer = &out_obj;
	172
	173	in_param.type = ACPI_TYPE_INTEGER;
	174	in_param.integer.value = device + 1;
	175
	176	status = acpi_evaluate_object(NULL, "\\_SB_.GECN", &input, &output);
	177	if (ACPI_FAILURE(status)) {
	178	printk(KERN_WARNING "IdeaPAD \\_SB_.GECN method failed %d\n", status);
	179	return -ENODEV;
	180	}
	181	if (out_obj.type != ACPI_TYPE_INTEGER) {
	182	printk(KERN_WARNING "IdeaPAD \\_SB_.GECN method returned unexpected type\n");
	183	return -ENODEV;
	184	}
	185	return out_obj.integer.value;
	186	}
	187
	188	static int ideapad_dev_set_state(int device, int state)
	189	{
	190	acpi_status status;
	191	union acpi_object in_params[2];
	192	struct acpi_object_list input = { 2, in_params };
	193
	194	in_params[0].type = ACPI_TYPE_INTEGER;
	195	in_params[0].integer.value = device + 1;
	196	in_params[1].type = ACPI_TYPE_INTEGER;
	197	in_params[1].integer.value = state;
	198
	199	status = acpi_evaluate_object(NULL, "\\_SB_.SECN", &input, NULL);
	200	if (ACPI_FAILURE(status)) {
	201	printk(KERN_WARNING "IdeaPAD \\_SB_.SECN method failed %d\n", status);
	202	return -ENODEV;
	203	}
	204	return 0;
	205	}
	206	static ssize_t show_ideapad_cam(struct device *dev,
	207	struct device_attribute *attr,
	208	char *buf)
	209	{
	210	int state = ideapad_dev_get_state(IDEAPAD_DEV_CAMERA);
	211	if (state < 0)
	212	return state;
	213
	214	return sprintf(buf, "%d\n", state);
	215	}
	216
	217	static ssize_t store_ideapad_cam(struct device *dev,
	218	struct device_attribute *attr,
	219	const char *buf, size_t count)
	220	{
	221	int ret, state;
	222
	223	if (!count)
	224	return 0;
	225	if (sscanf(buf, "%i", &state) != 1)
226	return -EINVAL;
2016e4a0	227	ret = ideapad_dev_set_state(IDEAPAD_DEV_CAMERA, !!state);
58ac7aa0 DW	228	if (ret < 0)
	229	return ret;
	230	return count;
	231	}
	232
	233	static DEVICE_ATTR(camera_power, 0644, show_ideapad_cam, store_ideapad_cam);
	234
	235	static int ideapad_rfk_set(void *data, bool blocked)
	236	{
	237	int device = (unsigned long)data;
	238
	239	if (device == IDEAPAD_DEV_KILLSW)
	240	return -EINVAL;
	241	return ideapad_dev_set_state(device, !blocked);
	242	}
	243
	244	static struct rfkill_ops ideapad_rfk_ops = {
	245	.set_block = ideapad_rfk_set,
	246	};
	247
ce326329	248	static void ideapad_sync_rfk_state(struct acpi_device *adevice)
58ac7aa0	249	{
ce326329	250	struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
58ac7aa0 DW	251	int hw_blocked = !ideapad_dev_get_state(IDEAPAD_DEV_KILLSW);
	252	int i;
	253
ce326329	254	rfkill_set_hw_state(priv->rfk[IDEAPAD_DEV_KILLSW], hw_blocked);
58ac7aa0	255	for (i = IDEAPAD_DEV_WLAN; i < IDEAPAD_DEV_KILLSW; i++)
ce326329 DW	256	if (priv->rfk[i])
ce326329 DW	257	rfkill_set_hw_state(priv->rfk[i], hw_blocked);
58ac7aa0 DW	258	if (hw_blocked)
	259	return;
	260
	261	for (i = IDEAPAD_DEV_WLAN; i < IDEAPAD_DEV_KILLSW; i++)
ce326329 DW	262	if (priv->rfk[i])
ce326329 DW	263	rfkill_set_sw_state(priv->rfk[i], !ideapad_dev_get_state(i));
58ac7aa0 DW	264	}
58ac7aa0 DW	265
ce326329	266	static int ideapad_register_rfkill(struct acpi_device *adevice, int dev)
58ac7aa0	267	{
ce326329	268	struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
58ac7aa0 DW	269	int ret;
58ac7aa0 DW	270
ce326329 DW	271	priv->rfk[dev] = rfkill_alloc(ideapad_rfk_data[dev-1].name, &adevice->dev,
	272	ideapad_rfk_data[dev-1].type, &ideapad_rfk_ops,
	273	(void *)(long)dev);
	274	if (!priv->rfk[dev])
58ac7aa0 DW	275	return -ENOMEM;
58ac7aa0 DW	276
ce326329	277	ret = rfkill_register(priv->rfk[dev]);
58ac7aa0	278	if (ret) {
ce326329	279	rfkill_destroy(priv->rfk[dev]);
58ac7aa0 DW	280	return ret;
	281	}
	282	return 0;
	283	}
	284
ce326329	285	static void ideapad_unregister_rfkill(struct acpi_device *adevice, int dev)
58ac7aa0	286	{
ce326329 DW	287	struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
	288
	289	if (!priv->rfk[dev])
58ac7aa0 DW	290	return;
58ac7aa0 DW	291
ce326329 DW	292	rfkill_unregister(priv->rfk[dev]);
ce326329 DW	293	rfkill_destroy(priv->rfk[dev]);
58ac7aa0 DW	294	}
	295
	296	static const struct acpi_device_id ideapad_device_ids[] = {
	297	{ "VPC2004", 0},
	298	{ "", 0},
	299	};
	300	MODULE_DEVICE_TABLE(acpi, ideapad_device_ids);
	301
ce326329	302	static int ideapad_acpi_add(struct acpi_device *adevice)
58ac7aa0	303	{
6f8371c0	304	int i, cfg;
58ac7aa0	305	int devs_present[5];
ce326329	306	struct ideapad_private *priv;
58ac7aa0	307
6f8371c0 IP	308	if (read_method_int(adevice->handle, "_CFG", &cfg))
	309	return -ENODEV;
	310
58ac7aa0	311	for (i = IDEAPAD_DEV_CAMERA; i < IDEAPAD_DEV_KILLSW; i++) {
dfa7f6fe IP	312	if (test_bit(ideapad_rfk_data[i].cfgbit, (unsigned long *)&cfg))
	313	devs_present[i] = 1;
	314	else
	315	devs_present[i] = 0;
58ac7aa0 DW	316	}
	317
	318	/* The hardware switch is always present */
	319	devs_present[IDEAPAD_DEV_KILLSW] = 1;
	320
ce326329 DW	321	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
	322	if (!priv)
	323	return -ENOMEM;
	324
58ac7aa0	325	if (devs_present[IDEAPAD_DEV_CAMERA]) {
ce326329 DW	326	int ret = device_create_file(&adevice->dev, &dev_attr_camera_power);
	327	if (ret) {
	328	kfree(priv);
58ac7aa0	329	return ret;
ce326329	330	}
58ac7aa0 DW	331	}
58ac7aa0 DW	332
ce326329	333	dev_set_drvdata(&adevice->dev, priv);
58ac7aa0 DW	334	for (i = IDEAPAD_DEV_WLAN; i <= IDEAPAD_DEV_KILLSW; i++) {
	335	if (!devs_present[i])
	336	continue;
	337
ce326329	338	ideapad_register_rfkill(adevice, i);
58ac7aa0	339	}
ce326329	340	ideapad_sync_rfk_state(adevice);
58ac7aa0 DW	341	return 0;
	342	}
	343
ce326329	344	static int ideapad_acpi_remove(struct acpi_device *adevice, int type)
58ac7aa0	345	{
ce326329	346	struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
58ac7aa0	347	int i;
ce326329 DW	348
	349	device_remove_file(&adevice->dev, &dev_attr_camera_power);
	350
	351	for (i = IDEAPAD_DEV_WLAN; i <= IDEAPAD_DEV_KILLSW; i++)
	352	ideapad_unregister_rfkill(adevice, i);
	353
	354	dev_set_drvdata(&adevice->dev, NULL);
	355	kfree(priv);
58ac7aa0 DW	356	return 0;
	357	}
	358
ce326329	359	static void ideapad_acpi_notify(struct acpi_device *adevice, u32 event)
58ac7aa0	360	{
8e7d3543 IP	361	acpi_handle handle = adevice->handle;
	362	unsigned long vpc1, vpc2, vpc_bit;
	363
	364	if (read_ec_data(handle, 0x10, &vpc1))
	365	return;
	366	if (read_ec_data(handle, 0x1A, &vpc2))
	367	return;
	368
	369	vpc1 = (vpc2 << 8) \| vpc1;
	370	for (vpc_bit = 0; vpc_bit < 16; vpc_bit++) {
	371	if (test_bit(vpc_bit, &vpc1)) {
	372	if (vpc_bit == 9)
	373	ideapad_sync_rfk_state(adevice);
	374	}
	375	}
58ac7aa0 DW	376	}
	377
	378	static struct acpi_driver ideapad_acpi_driver = {
	379	.name = "ideapad_acpi",
	380	.class = "IdeaPad",
	381	.ids = ideapad_device_ids,
	382	.ops.add = ideapad_acpi_add,
	383	.ops.remove = ideapad_acpi_remove,
	384	.ops.notify = ideapad_acpi_notify,
	385	.owner = THIS_MODULE,
	386	};
	387
	388
	389	static int __init ideapad_acpi_module_init(void)
	390	{
	391	acpi_bus_register_driver(&ideapad_acpi_driver);
	392
	393	return 0;
	394	}
	395
	396
	397	static void __exit ideapad_acpi_module_exit(void)
	398	{
	399	acpi_bus_unregister_driver(&ideapad_acpi_driver);
	400
	401	}
	402
	403	MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
	404	MODULE_DESCRIPTION("IdeaPad ACPI Extras");
	405	MODULE_LICENSE("GPL");
	406
	407	module_init(ideapad_acpi_module_init);
	408	module_exit(ideapad_acpi_module_exit);