[deliverable/linux.git] / drivers / platform / x86 / ideapad-laptop.c

/*
 *  ideapad-laptop.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>
#include <linux/platform_device.h>
#include <linux/input.h>
#include <linux/input/sparse-keymap.h>

#define IDEAPAD_RFKILL_DEV_NUM	(3)

struct ideapad_private {
	struct rfkill *rfk[IDEAPAD_RFKILL_DEV_NUM];
	struct platform_device *platform_device;
	struct input_dev *inputdev;
};

static acpi_handle ideapad_handle;
static bool no_bt_rfkill;
module_param(no_bt_rfkill, bool, 0444);
MODULE_PARM_DESC(no_bt_rfkill, "No rfkill for bluetooth.");

/*
 * 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;
}

/*
 * camera power
 */
static ssize_t show_ideapad_cam(struct device *dev,
				struct device_attribute *attr,
				char *buf)
{
	unsigned long result;

	if (read_ec_data(ideapad_handle, 0x1D, &result))
		return sprintf(buf, "-1\n");
	return sprintf(buf, "%lu\n", result);
}

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 = write_ec_cmd(ideapad_handle, 0x1E, state);
	if (ret < 0)
		return ret;
	return count;
}

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

/*
 * Rfkill
 */
struct ideapad_rfk_data {
	char *name;
	int cfgbit;
	int opcode;
	int type;
};

const struct ideapad_rfk_data ideapad_rfk_data[] = {
	{ "ideapad_wlan",	18, 0x15, RFKILL_TYPE_WLAN },
	{ "ideapad_bluetooth",	16, 0x17, RFKILL_TYPE_BLUETOOTH },
	{ "ideapad_3g",		17, 0x20, RFKILL_TYPE_WWAN },
};

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

	return write_ec_cmd(ideapad_handle, opcode, !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);
	unsigned long hw_blocked;
	int i;

	if (read_ec_data(ideapad_handle, 0x23, &hw_blocked))
		return;
	hw_blocked = !hw_blocked;

	for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
		if (priv->rfk[i])
			rfkill_set_hw_state(priv->rfk[i], hw_blocked);
}

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

	if (no_bt_rfkill &&
	    (ideapad_rfk_data[dev].type == RFKILL_TYPE_BLUETOOTH)) {
		/* Force to enable bluetooth when no_bt_rfkill=1 */
		write_ec_cmd(ideapad_handle,
			     ideapad_rfk_data[dev].opcode, 1);
		return 0;
	}

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

	if (read_ec_data(ideapad_handle, ideapad_rfk_data[dev].opcode-1,
			 &sw_blocked)) {
		rfkill_init_sw_state(priv->rfk[dev], 0);
	} else {
		sw_blocked = !sw_blocked;
		rfkill_init_sw_state(priv->rfk[dev], sw_blocked);
	}

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

static void __devexit 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]);
}

/*
 * Platform device
 */
static struct attribute *ideapad_attributes[] = {
	&dev_attr_camera_power.attr,
	NULL
};

static struct attribute_group ideapad_attribute_group = {
	.attrs = ideapad_attributes
};

static int __devinit ideapad_platform_init(struct ideapad_private *priv)
{
	int result;

	priv->platform_device = platform_device_alloc("ideapad", -1);
	if (!priv->platform_device)
		return -ENOMEM;
	platform_set_drvdata(priv->platform_device, priv);

	result = platform_device_add(priv->platform_device);
	if (result)
		goto fail_platform_device;

	result = sysfs_create_group(&priv->platform_device->dev.kobj,
				    &ideapad_attribute_group);
	if (result)
		goto fail_sysfs;
	return 0;

fail_sysfs:
	platform_device_del(priv->platform_device);
fail_platform_device:
	platform_device_put(priv->platform_device);
	return result;
}

static void ideapad_platform_exit(struct ideapad_private *priv)
{
	sysfs_remove_group(&priv->platform_device->dev.kobj,
			   &ideapad_attribute_group);
	platform_device_unregister(priv->platform_device);
}

/*
 * input device
 */
static const struct key_entry ideapad_keymap[] = {
	{ KE_KEY, 0x06, { KEY_SWITCHVIDEOMODE } },
	{ KE_KEY, 0x0D, { KEY_WLAN } },
	{ KE_END, 0 },
};

static int __devinit ideapad_input_init(struct ideapad_private *priv)
{
	struct input_dev *inputdev;
	int error;

	inputdev = input_allocate_device();
	if (!inputdev) {
		pr_info("Unable to allocate input device\n");
		return -ENOMEM;
	}

	inputdev->name = "Ideapad extra buttons";
	inputdev->phys = "ideapad/input0";
	inputdev->id.bustype = BUS_HOST;
	inputdev->dev.parent = &priv->platform_device->dev;

	error = sparse_keymap_setup(inputdev, ideapad_keymap, NULL);
	if (error) {
		pr_err("Unable to setup input device keymap\n");
		goto err_free_dev;
	}

	error = input_register_device(inputdev);
	if (error) {
		pr_err("Unable to register input device\n");
		goto err_free_keymap;
	}

	priv->inputdev = inputdev;
	return 0;

err_free_keymap:
	sparse_keymap_free(inputdev);
err_free_dev:
	input_free_device(inputdev);
	return error;
}

static void __devexit ideapad_input_exit(struct ideapad_private *priv)
{
	sparse_keymap_free(priv->inputdev);
	input_unregister_device(priv->inputdev);
	priv->inputdev = NULL;
}

static void ideapad_input_report(struct ideapad_private *priv,
				 unsigned long scancode)
{
	sparse_keymap_report_event(priv->inputdev, scancode, 1, true);
}

/*
 * module init/exit
 */
static const struct acpi_device_id ideapad_device_ids[] = {
	{ "VPC2004", 0},
	{ "", 0},
};
MODULE_DEVICE_TABLE(acpi, ideapad_device_ids);

static int __devinit ideapad_acpi_add(struct acpi_device *adevice)
{
	int ret, i, cfg;
	struct ideapad_private *priv;

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

	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
	if (!priv)
		return -ENOMEM;
	dev_set_drvdata(&adevice->dev, priv);
	ideapad_handle = adevice->handle;

	ret = ideapad_platform_init(priv);
	if (ret)
		goto platform_failed;

	ret = ideapad_input_init(priv);
	if (ret)
		goto input_failed;

	for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++) {
		if (test_bit(ideapad_rfk_data[i].cfgbit, (unsigned long *)&cfg))
			ideapad_register_rfkill(adevice, i);
		else
			priv->rfk[i] = NULL;
	}
	ideapad_sync_rfk_state(adevice);

	return 0;

input_failed:
	ideapad_platform_exit(priv);
platform_failed:
	kfree(priv);
	return ret;
}

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

	for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
		ideapad_unregister_rfkill(adevice, i);
	ideapad_input_exit(priv);
	ideapad_platform_exit(priv);
	dev_set_drvdata(&adevice->dev, NULL);
	kfree(priv);

	return 0;
}

static void ideapad_acpi_notify(struct acpi_device *adevice, u32 event)
{
	struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
	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);
			else if (vpc_bit == 4)
				read_ec_data(handle, 0x12, &vpc2);
			else
				ideapad_input_report(priv, vpc_bit);
		}
	}
}

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)
{
	return acpi_bus_register_driver(&ideapad_acpi_driver);
}

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
	1	/*
	2	* ideapad-laptop.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	#include <linux/platform_device.h>
	31	#include <linux/input.h>
	32	#include <linux/input/sparse-keymap.h>
	33
	34	#define IDEAPAD_RFKILL_DEV_NUM (3)
	35
	36	struct ideapad_private {
	37	struct rfkill *rfk[IDEAPAD_RFKILL_DEV_NUM];
	38	struct platform_device *platform_device;
	39	struct input_dev *inputdev;
	40	};
	41
	42	static acpi_handle ideapad_handle;
	43	static bool no_bt_rfkill;
	44	module_param(no_bt_rfkill, bool, 0444);
	45	MODULE_PARM_DESC(no_bt_rfkill, "No rfkill for bluetooth.");
	46
	47	/*
	48	* ACPI Helpers
	49	*/
	50	#define IDEAPAD_EC_TIMEOUT (100) /* in ms */
	51
	52	static int read_method_int(acpi_handle handle, const char method, int val)
	53	{
	54	acpi_status status;
	55	unsigned long long result;
	56
	57	status = acpi_evaluate_integer(handle, (char *)method, NULL, &result);
	58	if (ACPI_FAILURE(status)) {
	59	*val = -1;
	60	return -1;
	61	} else {
	62	*val = result;
	63	return 0;
	64	}
	65	}
	66
	67	static int method_vpcr(acpi_handle handle, int cmd, int *ret)
	68	{
	69	acpi_status status;
	70	unsigned long long result;
	71	struct acpi_object_list params;
	72	union acpi_object in_obj;
	73
	74	params.count = 1;
	75	params.pointer = &in_obj;
	76	in_obj.type = ACPI_TYPE_INTEGER;
	77	in_obj.integer.value = cmd;
	78
	79	status = acpi_evaluate_integer(handle, "VPCR", &params, &result);
	80
	81	if (ACPI_FAILURE(status)) {
	82	*ret = -1;
	83	return -1;
	84	} else {
	85	*ret = result;
	86	return 0;
	87	}
	88	}
	89
	90	static int method_vpcw(acpi_handle handle, int cmd, int data)
	91	{
	92	struct acpi_object_list params;
	93	union acpi_object in_obj[2];
	94	acpi_status status;
	95
	96	params.count = 2;
	97	params.pointer = in_obj;
	98	in_obj[0].type = ACPI_TYPE_INTEGER;
	99	in_obj[0].integer.value = cmd;
	100	in_obj[1].type = ACPI_TYPE_INTEGER;
	101	in_obj[1].integer.value = data;
	102
	103	status = acpi_evaluate_object(handle, "VPCW", &params, NULL);
	104	if (status != AE_OK)
	105	return -1;
	106	return 0;
	107	}
	108
	109	static int read_ec_data(acpi_handle handle, int cmd, unsigned long *data)
	110	{
	111	int val;
	112	unsigned long int end_jiffies;
	113
	114	if (method_vpcw(handle, 1, cmd))
	115	return -1;
	116
	117	for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
	118	time_before(jiffies, end_jiffies);) {
	119	schedule();
	120	if (method_vpcr(handle, 1, &val))
	121	return -1;
	122	if (val == 0) {
	123	if (method_vpcr(handle, 0, &val))
	124	return -1;
	125	*data = val;
	126	return 0;
	127	}
	128	}
	129	pr_err("timeout in read_ec_cmd\n");
	130	return -1;
	131	}
	132
	133	static int write_ec_cmd(acpi_handle handle, int cmd, unsigned long data)
	134	{
	135	int val;
	136	unsigned long int end_jiffies;
	137
	138	if (method_vpcw(handle, 0, data))
	139	return -1;
	140	if (method_vpcw(handle, 1, cmd))
	141	return -1;
	142
	143	for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
	144	time_before(jiffies, end_jiffies);) {
	145	schedule();
	146	if (method_vpcr(handle, 1, &val))
	147	return -1;
	148	if (val == 0)
	149	return 0;
	150	}
	151	pr_err("timeout in write_ec_cmd\n");
	152	return -1;
	153	}
	154
	155	/*
	156	* camera power
	157	*/
	158	static ssize_t show_ideapad_cam(struct device *dev,
	159	struct device_attribute *attr,
	160	char *buf)
	161	{
	162	unsigned long result;
	163
	164	if (read_ec_data(ideapad_handle, 0x1D, &result))
	165	return sprintf(buf, "-1\n");
	166	return sprintf(buf, "%lu\n", result);
	167	}
	168
	169	static ssize_t store_ideapad_cam(struct device *dev,
	170	struct device_attribute *attr,
	171	const char *buf, size_t count)
	172	{
	173	int ret, state;
	174
	175	if (!count)
	176	return 0;
	177	if (sscanf(buf, "%i", &state) != 1)
	178	return -EINVAL;
	179	ret = write_ec_cmd(ideapad_handle, 0x1E, state);
	180	if (ret < 0)
	181	return ret;
	182	return count;
	183	}
	184
	185	static DEVICE_ATTR(camera_power, 0644, show_ideapad_cam, store_ideapad_cam);
	186
	187	/*
	188	* Rfkill
	189	*/
	190	struct ideapad_rfk_data {
	191	char *name;
	192	int cfgbit;
	193	int opcode;
	194	int type;
	195	};
	196
	197	const struct ideapad_rfk_data ideapad_rfk_data[] = {
	198	{ "ideapad_wlan", 18, 0x15, RFKILL_TYPE_WLAN },
	199	{ "ideapad_bluetooth", 16, 0x17, RFKILL_TYPE_BLUETOOTH },
	200	{ "ideapad_3g", 17, 0x20, RFKILL_TYPE_WWAN },
	201	};
	202
	203	static int ideapad_rfk_set(void *data, bool blocked)
	204	{
	205	unsigned long opcode = (unsigned long)data;
	206
	207	return write_ec_cmd(ideapad_handle, opcode, !blocked);
	208	}
	209
	210	static struct rfkill_ops ideapad_rfk_ops = {
	211	.set_block = ideapad_rfk_set,
	212	};
	213
	214	static void ideapad_sync_rfk_state(struct acpi_device *adevice)
	215	{
	216	struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
	217	unsigned long hw_blocked;
	218	int i;
	219
	220	if (read_ec_data(ideapad_handle, 0x23, &hw_blocked))
	221	return;
	222	hw_blocked = !hw_blocked;
	223
	224	for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
	225	if (priv->rfk[i])
	226	rfkill_set_hw_state(priv->rfk[i], hw_blocked);
	227	}
	228
	229	static int __devinit ideapad_register_rfkill(struct acpi_device *adevice,
	230	int dev)
	231	{
	232	struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
	233	int ret;
	234	unsigned long sw_blocked;
	235
	236	if (no_bt_rfkill &&
	237	(ideapad_rfk_data[dev].type == RFKILL_TYPE_BLUETOOTH)) {
	238	/* Force to enable bluetooth when no_bt_rfkill=1 */
	239	write_ec_cmd(ideapad_handle,
	240	ideapad_rfk_data[dev].opcode, 1);
	241	return 0;
	242	}
	243
	244	priv->rfk[dev] = rfkill_alloc(ideapad_rfk_data[dev].name, &adevice->dev,
	245	ideapad_rfk_data[dev].type, &ideapad_rfk_ops,
	246	(void *)(long)dev);
	247	if (!priv->rfk[dev])
	248	return -ENOMEM;
	249
	250	if (read_ec_data(ideapad_handle, ideapad_rfk_data[dev].opcode-1,
	251	&sw_blocked)) {
	252	rfkill_init_sw_state(priv->rfk[dev], 0);
	253	} else {
	254	sw_blocked = !sw_blocked;
	255	rfkill_init_sw_state(priv->rfk[dev], sw_blocked);
	256	}
	257
	258	ret = rfkill_register(priv->rfk[dev]);
	259	if (ret) {
	260	rfkill_destroy(priv->rfk[dev]);
	261	return ret;
	262	}
	263	return 0;
	264	}
	265
	266	static void __devexit ideapad_unregister_rfkill(struct acpi_device *adevice,
	267	int dev)
	268	{
	269	struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
	270
	271	if (!priv->rfk[dev])
	272	return;
	273
	274	rfkill_unregister(priv->rfk[dev]);
	275	rfkill_destroy(priv->rfk[dev]);
	276	}
	277
	278	/*
	279	* Platform device
	280	*/
	281	static struct attribute *ideapad_attributes[] = {
	282	&dev_attr_camera_power.attr,
	283	NULL
	284	};
	285
	286	static struct attribute_group ideapad_attribute_group = {
	287	.attrs = ideapad_attributes
	288	};
	289
	290	static int __devinit ideapad_platform_init(struct ideapad_private *priv)
	291	{
	292	int result;
	293
	294	priv->platform_device = platform_device_alloc("ideapad", -1);
	295	if (!priv->platform_device)
	296	return -ENOMEM;
	297	platform_set_drvdata(priv->platform_device, priv);
	298
	299	result = platform_device_add(priv->platform_device);
	300	if (result)
	301	goto fail_platform_device;
	302
	303	result = sysfs_create_group(&priv->platform_device->dev.kobj,
	304	&ideapad_attribute_group);
	305	if (result)
	306	goto fail_sysfs;
	307	return 0;
	308
	309	fail_sysfs:
	310	platform_device_del(priv->platform_device);
	311	fail_platform_device:
	312	platform_device_put(priv->platform_device);
	313	return result;
	314	}
	315
	316	static void ideapad_platform_exit(struct ideapad_private *priv)
	317	{
	318	sysfs_remove_group(&priv->platform_device->dev.kobj,
	319	&ideapad_attribute_group);
	320	platform_device_unregister(priv->platform_device);
	321	}
	322
	323	/*
	324	* input device
	325	*/
	326	static const struct key_entry ideapad_keymap[] = {
	327	{ KE_KEY, 0x06, { KEY_SWITCHVIDEOMODE } },
	328	{ KE_KEY, 0x0D, { KEY_WLAN } },
	329	{ KE_END, 0 },
	330	};
	331
	332	static int __devinit ideapad_input_init(struct ideapad_private *priv)
	333	{
	334	struct input_dev *inputdev;
	335	int error;
	336
	337	inputdev = input_allocate_device();
	338	if (!inputdev) {
	339	pr_info("Unable to allocate input device\n");
	340	return -ENOMEM;
	341	}
	342
	343	inputdev->name = "Ideapad extra buttons";
	344	inputdev->phys = "ideapad/input0";
	345	inputdev->id.bustype = BUS_HOST;
	346	inputdev->dev.parent = &priv->platform_device->dev;
	347
	348	error = sparse_keymap_setup(inputdev, ideapad_keymap, NULL);
	349	if (error) {
	350	pr_err("Unable to setup input device keymap\n");
	351	goto err_free_dev;
	352	}
	353
	354	error = input_register_device(inputdev);
	355	if (error) {
	356	pr_err("Unable to register input device\n");
	357	goto err_free_keymap;
	358	}
	359
	360	priv->inputdev = inputdev;
	361	return 0;
	362
	363	err_free_keymap:
	364	sparse_keymap_free(inputdev);
	365	err_free_dev:
	366	input_free_device(inputdev);
	367	return error;
	368	}
	369
	370	static void __devexit ideapad_input_exit(struct ideapad_private *priv)
	371	{
	372	sparse_keymap_free(priv->inputdev);
	373	input_unregister_device(priv->inputdev);
	374	priv->inputdev = NULL;
	375	}
	376
	377	static void ideapad_input_report(struct ideapad_private *priv,
	378	unsigned long scancode)
	379	{
	380	sparse_keymap_report_event(priv->inputdev, scancode, 1, true);
	381	}
	382
	383	/*
	384	* module init/exit
	385	*/
	386	static const struct acpi_device_id ideapad_device_ids[] = {
	387	{ "VPC2004", 0},
	388	{ "", 0},
	389	};
	390	MODULE_DEVICE_TABLE(acpi, ideapad_device_ids);
	391
	392	static int __devinit ideapad_acpi_add(struct acpi_device *adevice)
	393	{
	394	int ret, i, cfg;
	395	struct ideapad_private *priv;
	396
	397	if (read_method_int(adevice->handle, "_CFG", &cfg))
	398	return -ENODEV;
	399
	400	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
	401	if (!priv)
	402	return -ENOMEM;
	403	dev_set_drvdata(&adevice->dev, priv);
	404	ideapad_handle = adevice->handle;
	405
	406	ret = ideapad_platform_init(priv);
	407	if (ret)
	408	goto platform_failed;
	409
	410	ret = ideapad_input_init(priv);
	411	if (ret)
	412	goto input_failed;
	413
	414	for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++) {
	415	if (test_bit(ideapad_rfk_data[i].cfgbit, (unsigned long *)&cfg))
	416	ideapad_register_rfkill(adevice, i);
	417	else
	418	priv->rfk[i] = NULL;
	419	}
	420	ideapad_sync_rfk_state(adevice);
	421
	422	return 0;
	423
	424	input_failed:
	425	ideapad_platform_exit(priv);
	426	platform_failed:
	427	kfree(priv);
	428	return ret;
	429	}
	430
	431	static int __devexit ideapad_acpi_remove(struct acpi_device *adevice, int type)
	432	{
	433	struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
	434	int i;
	435
	436	for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
	437	ideapad_unregister_rfkill(adevice, i);
	438	ideapad_input_exit(priv);
	439	ideapad_platform_exit(priv);
	440	dev_set_drvdata(&adevice->dev, NULL);
	441	kfree(priv);
	442
	443	return 0;
	444	}
	445
	446	static void ideapad_acpi_notify(struct acpi_device *adevice, u32 event)
	447	{
	448	struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
	449	acpi_handle handle = adevice->handle;
	450	unsigned long vpc1, vpc2, vpc_bit;
	451
	452	if (read_ec_data(handle, 0x10, &vpc1))
	453	return;
	454	if (read_ec_data(handle, 0x1A, &vpc2))
	455	return;
	456
	457	vpc1 = (vpc2 << 8) \| vpc1;
	458	for (vpc_bit = 0; vpc_bit < 16; vpc_bit++) {
	459	if (test_bit(vpc_bit, &vpc1)) {
	460	if (vpc_bit == 9)
	461	ideapad_sync_rfk_state(adevice);
	462	else if (vpc_bit == 4)
	463	read_ec_data(handle, 0x12, &vpc2);
	464	else
	465	ideapad_input_report(priv, vpc_bit);
	466	}
	467	}
	468	}
	469
	470	static struct acpi_driver ideapad_acpi_driver = {
	471	.name = "ideapad_acpi",
	472	.class = "IdeaPad",
	473	.ids = ideapad_device_ids,
	474	.ops.add = ideapad_acpi_add,
	475	.ops.remove = ideapad_acpi_remove,
	476	.ops.notify = ideapad_acpi_notify,
	477	.owner = THIS_MODULE,
	478	};
	479
	480	static int __init ideapad_acpi_module_init(void)
	481	{
	482	return acpi_bus_register_driver(&ideapad_acpi_driver);
	483	}
	484
	485	static void __exit ideapad_acpi_module_exit(void)
	486	{
	487	acpi_bus_unregister_driver(&ideapad_acpi_driver);
	488	}
	489
	490	MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
	491	MODULE_DESCRIPTION("IdeaPad ACPI Extras");
	492	MODULE_LICENSE("GPL");
	493
	494	module_init(ideapad_acpi_module_init);
	495	module_exit(ideapad_acpi_module_exit);