[linux-2.6-block.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.
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#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>
#include <linux/backlight.h>
#include <linux/fb.h>

#define IDEAPAD_RFKILL_DEV_NUM	(3)

#define CFG_BT_BIT	(16)
#define CFG_3G_BIT	(17)
#define CFG_WIFI_BIT	(18)
#define CFG_CAMERA_BIT	(19)

struct ideapad_private {
	struct rfkill *rfk[IDEAPAD_RFKILL_DEV_NUM];
	struct platform_device *platform_device;
	struct input_dev *inputdev;
	struct backlight_device *blightdev;
	unsigned long cfg;
};

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;
}

/*
 * sysfs
 */
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);

static ssize_t show_ideapad_cfg(struct device *dev,
				struct device_attribute *attr,
				char *buf)
{
	struct ideapad_private *priv = dev_get_drvdata(dev);

	return sprintf(buf, "0x%.8lX\n", priv->cfg);
}

static DEVICE_ATTR(cfg, 0444, show_ideapad_cfg, NULL);

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

static mode_t ideapad_is_visible(struct kobject *kobj,
				 struct attribute *attr,
				 int idx)
{
	struct device *dev = container_of(kobj, struct device, kobj);
	struct ideapad_private *priv = dev_get_drvdata(dev);
	bool supported;

	if (attr == &dev_attr_camera_power.attr)
		supported = test_bit(CFG_CAMERA_BIT, &(priv->cfg));
	else
		supported = true;

	return supported ? attr->mode : 0;
}

static struct attribute_group ideapad_attribute_group = {
	.is_visible = ideapad_is_visible,
	.attrs = ideapad_attributes
};

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

const struct ideapad_rfk_data ideapad_rfk_data[] = {
	{ "ideapad_wlan",      CFG_WIFI_BIT, 0x15, RFKILL_TYPE_WLAN },
	{ "ideapad_bluetooth", CFG_BT_BIT,   0x17, RFKILL_TYPE_BLUETOOTH },
	{ "ideapad_3g",        CFG_3G_BIT,   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 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 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 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);
}

/*
 * backlight
 */
static int ideapad_backlight_get_brightness(struct backlight_device *blightdev)
{
	unsigned long now;

	if (read_ec_data(ideapad_handle, 0x12, &now))
		return -EIO;
	return now;
}

static int ideapad_backlight_update_status(struct backlight_device *blightdev)
{
	if (write_ec_cmd(ideapad_handle, 0x13, blightdev->props.brightness))
		return -EIO;
	if (write_ec_cmd(ideapad_handle, 0x33,
			 blightdev->props.power == FB_BLANK_POWERDOWN ? 0 : 1))
		return -EIO;

	return 0;
}

static const struct backlight_ops ideapad_backlight_ops = {
	.get_brightness = ideapad_backlight_get_brightness,
	.update_status = ideapad_backlight_update_status,
};

static int ideapad_backlight_init(struct ideapad_private *priv)
{
	struct backlight_device *blightdev;
	struct backlight_properties props;
	unsigned long max, now, power;

	if (read_ec_data(ideapad_handle, 0x11, &max))
		return -EIO;
	if (read_ec_data(ideapad_handle, 0x12, &now))
		return -EIO;
	if (read_ec_data(ideapad_handle, 0x18, &power))
		return -EIO;

	memset(&props, 0, sizeof(struct backlight_properties));
	props.max_brightness = max;
	props.type = BACKLIGHT_PLATFORM;
	blightdev = backlight_device_register("ideapad",
					      &priv->platform_device->dev,
					      priv,
					      &ideapad_backlight_ops,
					      &props);
	if (IS_ERR(blightdev)) {
		pr_err("Could not register backlight device\n");
		return PTR_ERR(blightdev);
	}

	priv->blightdev = blightdev;
	blightdev->props.brightness = now;
	blightdev->props.power = power ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
	backlight_update_status(blightdev);

	return 0;
}

static void ideapad_backlight_exit(struct ideapad_private *priv)
{
	if (priv->blightdev)
		backlight_device_unregister(priv->blightdev);
	priv->blightdev = NULL;
}

static void ideapad_backlight_notify_power(struct ideapad_private *priv)
{
	unsigned long power;
	struct backlight_device *blightdev = priv->blightdev;

	if (read_ec_data(ideapad_handle, 0x18, &power))
		return;
	blightdev->props.power = power ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
}

static void ideapad_backlight_notify_brightness(struct ideapad_private *priv)
{
	unsigned long now;

	/* if we control brightness via acpi video driver */
	if (priv->blightdev == NULL) {
		read_ec_data(ideapad_handle, 0x12, &now);
		return;
	}

	backlight_force_update(priv->blightdev, BACKLIGHT_UPDATE_HOTKEY);
}

/*
 * 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;
	unsigned long cfg;
	struct ideapad_private *priv;

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

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

	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, &cfg))
			ideapad_register_rfkill(adevice, i);
		else
			priv->rfk[i] = NULL;
	}
	ideapad_sync_rfk_state(adevice);

	if (!acpi_video_backlight_support()) {
		ret = ideapad_backlight_init(priv);
		if (ret && ret != -ENODEV)
			goto backlight_failed;
	}

	return 0;

backlight_failed:
	for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
		ideapad_unregister_rfkill(adevice, i);
	ideapad_input_exit(priv);
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;

	ideapad_backlight_exit(priv);
	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)) {
			switch (vpc_bit) {
			case 9:
				ideapad_sync_rfk_state(adevice);
				break;
			case 4:
				ideapad_backlight_notify_brightness(priv);
				break;
			case 2:
				ideapad_backlight_notify_power(priv);
				break;
			default:
				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
58ac7aa0	1	/*
a4b5a279	2	* ideapad-laptop.c - Lenovo IdeaPad ACPI Extras
58ac7aa0 DW	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
9ab23989 JP	23	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
9ab23989 JP	24
58ac7aa0 DW	25	#include <linux/kernel.h>
	26	#include <linux/module.h>
	27	#include <linux/init.h>
	28	#include <linux/types.h>
	29	#include <acpi/acpi_bus.h>
	30	#include <acpi/acpi_drivers.h>
	31	#include <linux/rfkill.h>
98ee6919	32	#include <linux/platform_device.h>
f63409ae IP	33	#include <linux/input.h>
f63409ae IP	34	#include <linux/input/sparse-keymap.h>
a4ecbb8a IP	35	#include <linux/backlight.h>
a4ecbb8a IP	36	#include <linux/fb.h>
58ac7aa0	37
c1f73658	38	#define IDEAPAD_RFKILL_DEV_NUM (3)
58ac7aa0	39
3371f481 IP	40	#define CFG_BT_BIT (16)
	41	#define CFG_3G_BIT (17)
	42	#define CFG_WIFI_BIT (18)
a84511f7	43	#define CFG_CAMERA_BIT (19)
3371f481	44
ce326329	45	struct ideapad_private {
c1f73658	46	struct rfkill *rfk[IDEAPAD_RFKILL_DEV_NUM];
98ee6919	47	struct platform_device *platform_device;
f63409ae	48	struct input_dev *inputdev;
a4ecbb8a	49	struct backlight_device *blightdev;
3371f481	50	unsigned long cfg;
58ac7aa0 DW	51	};
58ac7aa0 DW	52
c1f73658	53	static acpi_handle ideapad_handle;
bfa97b7d IP	54	static bool no_bt_rfkill;
	55	module_param(no_bt_rfkill, bool, 0444);
	56	MODULE_PARM_DESC(no_bt_rfkill, "No rfkill for bluetooth.");
	57
6a09f21d IP	58	/*
	59	* ACPI Helpers
	60	*/
	61	#define IDEAPAD_EC_TIMEOUT (100) /* in ms */
	62
	63	static int read_method_int(acpi_handle handle, const char method, int val)
	64	{
	65	acpi_status status;
	66	unsigned long long result;
	67
	68	status = acpi_evaluate_integer(handle, (char *)method, NULL, &result);
	69	if (ACPI_FAILURE(status)) {
	70	*val = -1;
	71	return -1;
	72	} else {
	73	*val = result;
	74	return 0;
	75	}
	76	}
	77
	78	static int method_vpcr(acpi_handle handle, int cmd, int *ret)
	79	{
	80	acpi_status status;
	81	unsigned long long result;
	82	struct acpi_object_list params;
	83	union acpi_object in_obj;
	84
	85	params.count = 1;
	86	params.pointer = &in_obj;
	87	in_obj.type = ACPI_TYPE_INTEGER;
	88	in_obj.integer.value = cmd;
	89
	90	status = acpi_evaluate_integer(handle, "VPCR", &params, &result);
	91
	92	if (ACPI_FAILURE(status)) {
	93	*ret = -1;
	94	return -1;
	95	} else {
	96	*ret = result;
	97	return 0;
	98	}
	99	}
	100
	101	static int method_vpcw(acpi_handle handle, int cmd, int data)
	102	{
	103	struct acpi_object_list params;
	104	union acpi_object in_obj[2];
	105	acpi_status status;
	106
	107	params.count = 2;
	108	params.pointer = in_obj;
	109	in_obj[0].type = ACPI_TYPE_INTEGER;
	110	in_obj[0].integer.value = cmd;
	111	in_obj[1].type = ACPI_TYPE_INTEGER;
	112	in_obj[1].integer.value = data;
	113
	114	status = acpi_evaluate_object(handle, "VPCW", &params, NULL);
	115	if (status != AE_OK)
	116	return -1;
	117	return 0;
	118	}
	119
	120	static int read_ec_data(acpi_handle handle, int cmd, unsigned long *data)
	121	{
122	int val;
123	unsigned long int end_jiffies;
124
125	if (method_vpcw(handle, 1, cmd))
126	return -1;
127
128	for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
129	time_before(jiffies, end_jiffies);) {
130	schedule();
131	if (method_vpcr(handle, 1, &val))
132	return -1;
133	if (val == 0) {
134	if (method_vpcr(handle, 0, &val))
135	return -1;
136	*data = val;
137	return 0;
138	}
139	}
140	pr_err("timeout in read_ec_cmd\n");
141	return -1;
142	}
143
144	static int write_ec_cmd(acpi_handle handle, int cmd, unsigned long data)
145	{
146	int val;
147	unsigned long int end_jiffies;
148
149	if (method_vpcw(handle, 0, data))
150	return -1;
151	if (method_vpcw(handle, 1, cmd))
152	return -1;
153
154	for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
155	time_before(jiffies, end_jiffies);) {
156	schedule();
157	if (method_vpcr(handle, 1, &val))
158	return -1;
159	if (val == 0)
160	return 0;
161	}
162	pr_err("timeout in write_ec_cmd\n");
163	return -1;
164	}
6a09f21d	165
a4b5a279	166	/*
3371f481	167	* sysfs
a4b5a279	168	*/
58ac7aa0 DW	169	static ssize_t show_ideapad_cam(struct device *dev,
	170	struct device_attribute *attr,
	171	char *buf)
	172	{
26c81d5c	173	unsigned long result;
58ac7aa0	174
c1f73658	175	if (read_ec_data(ideapad_handle, 0x1D, &result))
26c81d5c IP	176	return sprintf(buf, "-1\n");
26c81d5c IP	177	return sprintf(buf, "%lu\n", result);
58ac7aa0 DW	178	}
	179
	180	static ssize_t store_ideapad_cam(struct device *dev,
	181	struct device_attribute *attr,
	182	const char *buf, size_t count)
	183	{
	184	int ret, state;
	185
	186	if (!count)
	187	return 0;
	188	if (sscanf(buf, "%i", &state) != 1)
	189	return -EINVAL;
c1f73658	190	ret = write_ec_cmd(ideapad_handle, 0x1E, state);
58ac7aa0 DW	191	if (ret < 0)
	192	return ret;
	193	return count;
	194	}
	195
	196	static DEVICE_ATTR(camera_power, 0644, show_ideapad_cam, store_ideapad_cam);
	197
3371f481 IP	198	static ssize_t show_ideapad_cfg(struct device *dev,
	199	struct device_attribute *attr,
	200	char *buf)
	201	{
	202	struct ideapad_private *priv = dev_get_drvdata(dev);
	203
	204	return sprintf(buf, "0x%.8lX\n", priv->cfg);
	205	}
	206
	207	static DEVICE_ATTR(cfg, 0444, show_ideapad_cfg, NULL);
	208
	209	static struct attribute *ideapad_attributes[] = {
	210	&dev_attr_camera_power.attr,
	211	&dev_attr_cfg.attr,
	212	NULL
	213	};
	214
a84511f7 IP	215	static mode_t ideapad_is_visible(struct kobject *kobj,
	216	struct attribute *attr,
	217	int idx)
	218	{
	219	struct device *dev = container_of(kobj, struct device, kobj);
	220	struct ideapad_private *priv = dev_get_drvdata(dev);
	221	bool supported;
	222
	223	if (attr == &dev_attr_camera_power.attr)
	224	supported = test_bit(CFG_CAMERA_BIT, &(priv->cfg));
	225	else
	226	supported = true;
	227
	228	return supported ? attr->mode : 0;
	229	}
	230
3371f481	231	static struct attribute_group ideapad_attribute_group = {
a84511f7	232	.is_visible = ideapad_is_visible,
3371f481 IP	233	.attrs = ideapad_attributes
	234	};
	235
a4b5a279 IP	236	/*
	237	* Rfkill
	238	*/
c1f73658 IP	239	struct ideapad_rfk_data {
	240	char *name;
	241	int cfgbit;
	242	int opcode;
	243	int type;
	244	};
	245
	246	const struct ideapad_rfk_data ideapad_rfk_data[] = {
3371f481 IP	247	{ "ideapad_wlan", CFG_WIFI_BIT, 0x15, RFKILL_TYPE_WLAN },
	248	{ "ideapad_bluetooth", CFG_BT_BIT, 0x17, RFKILL_TYPE_BLUETOOTH },
	249	{ "ideapad_3g", CFG_3G_BIT, 0x20, RFKILL_TYPE_WWAN },
c1f73658 IP	250	};
c1f73658 IP	251
58ac7aa0 DW	252	static int ideapad_rfk_set(void *data, bool blocked)
58ac7aa0 DW	253	{
c1f73658	254	unsigned long opcode = (unsigned long)data;
fa08359e	255
c1f73658	256	return write_ec_cmd(ideapad_handle, opcode, !blocked);
58ac7aa0 DW	257	}
	258
	259	static struct rfkill_ops ideapad_rfk_ops = {
	260	.set_block = ideapad_rfk_set,
	261	};
	262
ce326329	263	static void ideapad_sync_rfk_state(struct acpi_device *adevice)
58ac7aa0	264	{
ce326329	265	struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
2b7266bd	266	unsigned long hw_blocked;
58ac7aa0 DW	267	int i;
58ac7aa0 DW	268
c1f73658	269	if (read_ec_data(ideapad_handle, 0x23, &hw_blocked))
58ac7aa0	270	return;
2b7266bd	271	hw_blocked = !hw_blocked;
58ac7aa0	272
c1f73658	273	for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
ce326329	274	if (priv->rfk[i])
2b7266bd	275	rfkill_set_hw_state(priv->rfk[i], hw_blocked);
58ac7aa0 DW	276	}
58ac7aa0 DW	277
a4b5a279 IP	278	static int __devinit ideapad_register_rfkill(struct acpi_device *adevice,
a4b5a279 IP	279	int dev)
58ac7aa0	280	{
ce326329	281	struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
58ac7aa0	282	int ret;
2b7266bd	283	unsigned long sw_blocked;
58ac7aa0	284
bfa97b7d IP	285	if (no_bt_rfkill &&
	286	(ideapad_rfk_data[dev].type == RFKILL_TYPE_BLUETOOTH)) {
	287	/* Force to enable bluetooth when no_bt_rfkill=1 */
c1f73658	288	write_ec_cmd(ideapad_handle,
bfa97b7d IP	289	ideapad_rfk_data[dev].opcode, 1);
	290	return 0;
	291	}
	292
2b7266bd IP	293	priv->rfk[dev] = rfkill_alloc(ideapad_rfk_data[dev].name, &adevice->dev,
2b7266bd IP	294	ideapad_rfk_data[dev].type, &ideapad_rfk_ops,
ce326329 DW	295	(void *)(long)dev);
ce326329 DW	296	if (!priv->rfk[dev])
58ac7aa0 DW	297	return -ENOMEM;
58ac7aa0 DW	298
c1f73658	299	if (read_ec_data(ideapad_handle, ideapad_rfk_data[dev].opcode-1,
2b7266bd IP	300	&sw_blocked)) {
	301	rfkill_init_sw_state(priv->rfk[dev], 0);
	302	} else {
	303	sw_blocked = !sw_blocked;
	304	rfkill_init_sw_state(priv->rfk[dev], sw_blocked);
	305	}
	306
ce326329	307	ret = rfkill_register(priv->rfk[dev]);
58ac7aa0	308	if (ret) {
ce326329	309	rfkill_destroy(priv->rfk[dev]);
58ac7aa0 DW	310	return ret;
	311	}
	312	return 0;
	313	}
	314
a4ecbb8a	315	static void ideapad_unregister_rfkill(struct acpi_device *adevice, int dev)
58ac7aa0	316	{
ce326329 DW	317	struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
	318
	319	if (!priv->rfk[dev])
58ac7aa0 DW	320	return;
58ac7aa0 DW	321
ce326329 DW	322	rfkill_unregister(priv->rfk[dev]);
ce326329 DW	323	rfkill_destroy(priv->rfk[dev]);
58ac7aa0 DW	324	}
58ac7aa0 DW	325
98ee6919 IP	326	/*
	327	* Platform device
	328	*/
8693ae84	329	static int __devinit ideapad_platform_init(struct ideapad_private *priv)
98ee6919 IP	330	{
	331	int result;
	332
8693ae84 IP	333	priv->platform_device = platform_device_alloc("ideapad", -1);
8693ae84 IP	334	if (!priv->platform_device)
98ee6919	335	return -ENOMEM;
8693ae84	336	platform_set_drvdata(priv->platform_device, priv);
98ee6919	337
8693ae84	338	result = platform_device_add(priv->platform_device);
98ee6919 IP	339	if (result)
	340	goto fail_platform_device;
	341
8693ae84	342	result = sysfs_create_group(&priv->platform_device->dev.kobj,
c9f718d0 IP	343	&ideapad_attribute_group);
	344	if (result)
	345	goto fail_sysfs;
98ee6919 IP	346	return 0;
98ee6919 IP	347
c9f718d0	348	fail_sysfs:
8693ae84	349	platform_device_del(priv->platform_device);
98ee6919	350	fail_platform_device:
8693ae84	351	platform_device_put(priv->platform_device);
98ee6919 IP	352	return result;
	353	}
	354
8693ae84	355	static void ideapad_platform_exit(struct ideapad_private *priv)
98ee6919	356	{
8693ae84	357	sysfs_remove_group(&priv->platform_device->dev.kobj,
c9f718d0	358	&ideapad_attribute_group);
8693ae84	359	platform_device_unregister(priv->platform_device);
98ee6919	360	}
98ee6919	361
f63409ae IP	362	/*
	363	* input device
	364	*/
	365	static const struct key_entry ideapad_keymap[] = {
	366	{ KE_KEY, 0x06, { KEY_SWITCHVIDEOMODE } },
	367	{ KE_KEY, 0x0D, { KEY_WLAN } },
	368	{ KE_END, 0 },
	369	};
	370
8693ae84	371	static int __devinit ideapad_input_init(struct ideapad_private *priv)
f63409ae IP	372	{
	373	struct input_dev *inputdev;
	374	int error;
	375
	376	inputdev = input_allocate_device();
	377	if (!inputdev) {
	378	pr_info("Unable to allocate input device\n");
	379	return -ENOMEM;
	380	}
	381
	382	inputdev->name = "Ideapad extra buttons";
	383	inputdev->phys = "ideapad/input0";
	384	inputdev->id.bustype = BUS_HOST;
8693ae84	385	inputdev->dev.parent = &priv->platform_device->dev;
f63409ae IP	386
	387	error = sparse_keymap_setup(inputdev, ideapad_keymap, NULL);
	388	if (error) {
	389	pr_err("Unable to setup input device keymap\n");
	390	goto err_free_dev;
	391	}
	392
	393	error = input_register_device(inputdev);
	394	if (error) {
	395	pr_err("Unable to register input device\n");
	396	goto err_free_keymap;
	397	}
	398
8693ae84	399	priv->inputdev = inputdev;
f63409ae IP	400	return 0;
	401
	402	err_free_keymap:
	403	sparse_keymap_free(inputdev);
	404	err_free_dev:
	405	input_free_device(inputdev);
	406	return error;
	407	}
	408
7451a55a	409	static void ideapad_input_exit(struct ideapad_private *priv)
f63409ae	410	{
8693ae84 IP	411	sparse_keymap_free(priv->inputdev);
	412	input_unregister_device(priv->inputdev);
	413	priv->inputdev = NULL;
f63409ae IP	414	}
f63409ae IP	415
8693ae84 IP	416	static void ideapad_input_report(struct ideapad_private *priv,
8693ae84 IP	417	unsigned long scancode)
f63409ae	418	{
8693ae84	419	sparse_keymap_report_event(priv->inputdev, scancode, 1, true);
f63409ae	420	}
f63409ae	421
a4ecbb8a IP	422	/*
	423	* backlight
	424	*/
	425	static int ideapad_backlight_get_brightness(struct backlight_device *blightdev)
	426	{
	427	unsigned long now;
	428
	429	if (read_ec_data(ideapad_handle, 0x12, &now))
	430	return -EIO;
	431	return now;
	432	}
	433
	434	static int ideapad_backlight_update_status(struct backlight_device *blightdev)
	435	{
	436	if (write_ec_cmd(ideapad_handle, 0x13, blightdev->props.brightness))
	437	return -EIO;
	438	if (write_ec_cmd(ideapad_handle, 0x33,
	439	blightdev->props.power == FB_BLANK_POWERDOWN ? 0 : 1))
	440	return -EIO;
	441
	442	return 0;
	443	}
	444
	445	static const struct backlight_ops ideapad_backlight_ops = {
	446	.get_brightness = ideapad_backlight_get_brightness,
	447	.update_status = ideapad_backlight_update_status,
	448	};
	449
	450	static int ideapad_backlight_init(struct ideapad_private *priv)
	451	{
	452	struct backlight_device *blightdev;
	453	struct backlight_properties props;
	454	unsigned long max, now, power;
	455
	456	if (read_ec_data(ideapad_handle, 0x11, &max))
	457	return -EIO;
	458	if (read_ec_data(ideapad_handle, 0x12, &now))
	459	return -EIO;
	460	if (read_ec_data(ideapad_handle, 0x18, &power))
	461	return -EIO;
	462
	463	memset(&props, 0, sizeof(struct backlight_properties));
	464	props.max_brightness = max;
	465	props.type = BACKLIGHT_PLATFORM;
	466	blightdev = backlight_device_register("ideapad",
	467	&priv->platform_device->dev,
	468	priv,
	469	&ideapad_backlight_ops,
	470	&props);
	471	if (IS_ERR(blightdev)) {
	472	pr_err("Could not register backlight device\n");
	473	return PTR_ERR(blightdev);
	474	}
	475
	476	priv->blightdev = blightdev;
	477	blightdev->props.brightness = now;
	478	blightdev->props.power = power ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
	479	backlight_update_status(blightdev);
	480
	481	return 0;
	482	}
	483
	484	static void ideapad_backlight_exit(struct ideapad_private *priv)
	485	{
486	if (priv->blightdev)
487	backlight_device_unregister(priv->blightdev);
488	priv->blightdev = NULL;
489	}
490
491	static void ideapad_backlight_notify_power(struct ideapad_private *priv)
492	{
493	unsigned long power;
494	struct backlight_device *blightdev = priv->blightdev;
495
496	if (read_ec_data(ideapad_handle, 0x18, &power))
497	return;
498	blightdev->props.power = power ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
499	}
500
501	static void ideapad_backlight_notify_brightness(struct ideapad_private *priv)
502	{
503	unsigned long now;
504
505	/* if we control brightness via acpi video driver */
506	if (priv->blightdev == NULL) {
507	read_ec_data(ideapad_handle, 0x12, &now);
508	return;
509	}
510
511	backlight_force_update(priv->blightdev, BACKLIGHT_UPDATE_HOTKEY);
512	}
513
a4b5a279 IP	514	/*
	515	* module init/exit
	516	*/
58ac7aa0 DW	517	static const struct acpi_device_id ideapad_device_ids[] = {
	518	{ "VPC2004", 0},
	519	{ "", 0},
	520	};
	521	MODULE_DEVICE_TABLE(acpi, ideapad_device_ids);
	522
a4b5a279	523	static int __devinit ideapad_acpi_add(struct acpi_device *adevice)
58ac7aa0	524	{
3371f481 IP	525	int ret, i;
3371f481 IP	526	unsigned long cfg;
ce326329	527	struct ideapad_private *priv;
58ac7aa0	528
3371f481	529	if (read_method_int(adevice->handle, "_CFG", (int *)&cfg))
6f8371c0 IP	530	return -ENODEV;
6f8371c0 IP	531
ce326329 DW	532	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
	533	if (!priv)
	534	return -ENOMEM;
c9f718d0	535	dev_set_drvdata(&adevice->dev, priv);
c1f73658	536	ideapad_handle = adevice->handle;
3371f481	537	priv->cfg = cfg;
98ee6919	538
8693ae84	539	ret = ideapad_platform_init(priv);
98ee6919 IP	540	if (ret)
98ee6919 IP	541	goto platform_failed;
ce326329	542
8693ae84	543	ret = ideapad_input_init(priv);
f63409ae IP	544	if (ret)
	545	goto input_failed;
	546
c1f73658	547	for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++) {
3371f481	548	if (test_bit(ideapad_rfk_data[i].cfgbit, &cfg))
c9f718d0	549	ideapad_register_rfkill(adevice, i);
c1f73658 IP	550	else
c1f73658 IP	551	priv->rfk[i] = NULL;
58ac7aa0	552	}
ce326329	553	ideapad_sync_rfk_state(adevice);
c9f718d0	554
a4ecbb8a IP	555	if (!acpi_video_backlight_support()) {
	556	ret = ideapad_backlight_init(priv);
	557	if (ret && ret != -ENODEV)
	558	goto backlight_failed;
	559	}
	560
58ac7aa0	561	return 0;
98ee6919	562
a4ecbb8a IP	563	backlight_failed:
	564	for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
	565	ideapad_unregister_rfkill(adevice, i);
7451a55a	566	ideapad_input_exit(priv);
f63409ae	567	input_failed:
8693ae84	568	ideapad_platform_exit(priv);
98ee6919 IP	569	platform_failed:
	570	kfree(priv);
	571	return ret;
58ac7aa0 DW	572	}
58ac7aa0 DW	573
a4b5a279	574	static int __devexit ideapad_acpi_remove(struct acpi_device *adevice, int type)
58ac7aa0	575	{
ce326329	576	struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
58ac7aa0	577	int i;
ce326329	578
a4ecbb8a	579	ideapad_backlight_exit(priv);
c1f73658	580	for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
ce326329	581	ideapad_unregister_rfkill(adevice, i);
8693ae84 IP	582	ideapad_input_exit(priv);
8693ae84 IP	583	ideapad_platform_exit(priv);
ce326329 DW	584	dev_set_drvdata(&adevice->dev, NULL);
ce326329 DW	585	kfree(priv);
c9f718d0	586
58ac7aa0 DW	587	return 0;
	588	}
	589
ce326329	590	static void ideapad_acpi_notify(struct acpi_device *adevice, u32 event)
58ac7aa0	591	{
8693ae84	592	struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
8e7d3543 IP	593	acpi_handle handle = adevice->handle;
	594	unsigned long vpc1, vpc2, vpc_bit;
	595
	596	if (read_ec_data(handle, 0x10, &vpc1))
	597	return;
	598	if (read_ec_data(handle, 0x1A, &vpc2))
	599	return;
	600
	601	vpc1 = (vpc2 << 8) \| vpc1;
	602	for (vpc_bit = 0; vpc_bit < 16; vpc_bit++) {
	603	if (test_bit(vpc_bit, &vpc1)) {
a4ecbb8a IP	604	switch (vpc_bit) {
a4ecbb8a IP	605	case 9:
8e7d3543	606	ideapad_sync_rfk_state(adevice);
a4ecbb8a IP	607	break;
	608	case 4:
	609	ideapad_backlight_notify_brightness(priv);
	610	break;
	611	case 2:
	612	ideapad_backlight_notify_power(priv);
	613	break;
	614	default:
8693ae84	615	ideapad_input_report(priv, vpc_bit);
a4ecbb8a	616	}
8e7d3543 IP	617	}
8e7d3543 IP	618	}
58ac7aa0 DW	619	}
	620
	621	static struct acpi_driver ideapad_acpi_driver = {
	622	.name = "ideapad_acpi",
	623	.class = "IdeaPad",
	624	.ids = ideapad_device_ids,
	625	.ops.add = ideapad_acpi_add,
	626	.ops.remove = ideapad_acpi_remove,
	627	.ops.notify = ideapad_acpi_notify,
	628	.owner = THIS_MODULE,
	629	};
	630
58ac7aa0 DW	631	static int __init ideapad_acpi_module_init(void)
58ac7aa0 DW	632	{
a4b5a279	633	return acpi_bus_register_driver(&ideapad_acpi_driver);
58ac7aa0 DW	634	}
58ac7aa0 DW	635
58ac7aa0 DW	636	static void __exit ideapad_acpi_module_exit(void)
	637	{
	638	acpi_bus_unregister_driver(&ideapad_acpi_driver);
58ac7aa0 DW	639	}
	640
	641	MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
	642	MODULE_DESCRIPTION("IdeaPad ACPI Extras");
	643	MODULE_LICENSE("GPL");
	644
	645	module_init(ideapad_acpi_module_init);
	646	module_exit(ideapad_acpi_module_exit);