[mirror_ubuntu-artful-kernel.git] / drivers / platform / x86 / msi-wmi.c

/*
 * MSI WMI hotkeys
 *
 * Copyright (C) 2009 Novell <trenn@suse.de>
 *
 * Most stuff taken over from hp-wmi
 *
 *  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/kernel.h>
#include <linux/input.h>
#include <linux/input/sparse-keymap.h>
#include <linux/acpi.h>
#include <linux/backlight.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <acpi/video.h>

MODULE_AUTHOR("Thomas Renninger <trenn@suse.de>");
MODULE_DESCRIPTION("MSI laptop WMI hotkeys driver");
MODULE_LICENSE("GPL");

#define DRV_NAME "msi-wmi"

#define MSIWMI_BIOS_GUID "551A1F84-FBDD-4125-91DB-3EA8F44F1D45"
#define MSIWMI_MSI_EVENT_GUID "B6F3EEF2-3D2F-49DC-9DE3-85BCE18C62F2"
#define MSIWMI_WIND_EVENT_GUID "5B3CC38A-40D9-7245-8AE6-1145B751BE3F"

MODULE_ALIAS("wmi:" MSIWMI_BIOS_GUID);
MODULE_ALIAS("wmi:" MSIWMI_MSI_EVENT_GUID);
MODULE_ALIAS("wmi:" MSIWMI_WIND_EVENT_GUID);

enum msi_scancodes {
	/* Generic MSI keys (not present on MSI Wind) */
	MSI_KEY_BRIGHTNESSUP	= 0xD0,
	MSI_KEY_BRIGHTNESSDOWN,
	MSI_KEY_VOLUMEUP,
	MSI_KEY_VOLUMEDOWN,
	MSI_KEY_MUTE,
	/* MSI Wind keys */
	WIND_KEY_TOUCHPAD	= 0x08,	/* Fn+F3 touchpad toggle */
	WIND_KEY_BLUETOOTH	= 0x56,	/* Fn+F11 Bluetooth toggle */
	WIND_KEY_CAMERA,		/* Fn+F6 webcam toggle */
	WIND_KEY_WLAN		= 0x5f,	/* Fn+F11 Wi-Fi toggle */
	WIND_KEY_TURBO,			/* Fn+F10 turbo mode toggle */
	WIND_KEY_ECO		= 0x69,	/* Fn+F10 ECO mode toggle */
};
static struct key_entry msi_wmi_keymap[] = {
	{ KE_KEY, MSI_KEY_BRIGHTNESSUP,		{KEY_BRIGHTNESSUP} },
	{ KE_KEY, MSI_KEY_BRIGHTNESSDOWN,	{KEY_BRIGHTNESSDOWN} },
	{ KE_KEY, MSI_KEY_VOLUMEUP,		{KEY_VOLUMEUP} },
	{ KE_KEY, MSI_KEY_VOLUMEDOWN,		{KEY_VOLUMEDOWN} },
	{ KE_KEY, MSI_KEY_MUTE,			{KEY_MUTE} },

	/* These keys work without WMI. Ignore them to avoid double keycodes */
	{ KE_IGNORE, WIND_KEY_TOUCHPAD,		{KEY_TOUCHPAD_TOGGLE} },
	{ KE_IGNORE, WIND_KEY_BLUETOOTH,	{KEY_BLUETOOTH} },
	{ KE_IGNORE, WIND_KEY_CAMERA,		{KEY_CAMERA} },
	{ KE_IGNORE, WIND_KEY_WLAN,		{KEY_WLAN} },

	/* These are unknown WMI events found on MSI Wind */
	{ KE_IGNORE, 0x00 },
	{ KE_IGNORE, 0x62 },
	{ KE_IGNORE, 0x63 },

	/* These are MSI Wind keys that should be handled via WMI */
	{ KE_KEY, WIND_KEY_TURBO,		{KEY_PROG1} },
	{ KE_KEY, WIND_KEY_ECO,			{KEY_PROG2} },

	{ KE_END, 0 }
};

static ktime_t last_pressed;

static const struct {
	const char *guid;
	bool quirk_last_pressed;
} *event_wmi, event_wmis[] = {
	{ MSIWMI_MSI_EVENT_GUID, true },
	{ MSIWMI_WIND_EVENT_GUID, false },
};

static struct backlight_device *backlight;

static int backlight_map[] = { 0x00, 0x33, 0x66, 0x99, 0xCC, 0xFF };

static struct input_dev *msi_wmi_input_dev;

static int msi_wmi_query_block(int instance, int *ret)
{
	acpi_status status;
	union acpi_object *obj;

	struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };

	status = wmi_query_block(MSIWMI_BIOS_GUID, instance, &output);

	obj = output.pointer;

	if (!obj || obj->type != ACPI_TYPE_INTEGER) {
		if (obj) {
			pr_err("query block returned object "
			       "type: %d - buffer length:%d\n", obj->type,
			       obj->type == ACPI_TYPE_BUFFER ?
			       obj->buffer.length : 0);
		}
		kfree(obj);
		return -EINVAL;
	}
	*ret = obj->integer.value;
	kfree(obj);
	return 0;
}

static int msi_wmi_set_block(int instance, int value)
{
	acpi_status status;

	struct acpi_buffer input = { sizeof(int), &value };

	pr_debug("Going to set block of instance: %d - value: %d\n",
		 instance, value);

	status = wmi_set_block(MSIWMI_BIOS_GUID, instance, &input);

	return ACPI_SUCCESS(status) ? 0 : 1;
}

static int bl_get(struct backlight_device *bd)
{
	int level, err, ret;

	/* Instance 1 is "get backlight", cmp with DSDT */
	err = msi_wmi_query_block(1, &ret);
	if (err) {
		pr_err("Could not query backlight: %d\n", err);
		return -EINVAL;
	}
	pr_debug("Get: Query block returned: %d\n", ret);
	for (level = 0; level < ARRAY_SIZE(backlight_map); level++) {
		if (backlight_map[level] == ret) {
			pr_debug("Current backlight level: 0x%X - index: %d\n",
				 backlight_map[level], level);
			break;
		}
	}
	if (level == ARRAY_SIZE(backlight_map)) {
		pr_err("get: Invalid brightness value: 0x%X\n", ret);
		return -EINVAL;
	}
	return level;
}

static int bl_set_status(struct backlight_device *bd)
{
	int bright = bd->props.brightness;
	if (bright >= ARRAY_SIZE(backlight_map) || bright < 0)
		return -EINVAL;

	/* Instance 0 is "set backlight" */
	return msi_wmi_set_block(0, backlight_map[bright]);
}

static const struct backlight_ops msi_backlight_ops = {
	.get_brightness	= bl_get,
	.update_status	= bl_set_status,
};

static void msi_wmi_notify(u32 value, void *context)
{
	struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
	static struct key_entry *key;
	union acpi_object *obj;
	acpi_status status;

	status = wmi_get_event_data(value, &response);
	if (status != AE_OK) {
		pr_info("bad event status 0x%x\n", status);
		return;
	}

	obj = (union acpi_object *)response.pointer;

	if (obj && obj->type == ACPI_TYPE_INTEGER) {
		int eventcode = obj->integer.value;
		pr_debug("Eventcode: 0x%x\n", eventcode);
		key = sparse_keymap_entry_from_scancode(msi_wmi_input_dev,
				eventcode);
		if (!key) {
			pr_info("Unknown key pressed - %x\n", eventcode);
			goto msi_wmi_notify_exit;
		}

		if (event_wmi->quirk_last_pressed) {
			ktime_t cur = ktime_get_real();
			ktime_t diff = ktime_sub(cur, last_pressed);
			/* Ignore event if any event happened in a 50 ms
			   timeframe -> Key press may result in 10-20 GPEs */
			if (ktime_to_us(diff) < 1000 * 50) {
				pr_debug("Suppressed key event 0x%X - "
					 "Last press was %lld us ago\n",
					 key->code, ktime_to_us(diff));
				goto msi_wmi_notify_exit;
			}
			last_pressed = cur;
		}

		if (key->type == KE_KEY &&
		/* Brightness is served via acpi video driver */
		(backlight ||
		(key->code != MSI_KEY_BRIGHTNESSUP &&
		key->code != MSI_KEY_BRIGHTNESSDOWN))) {
			pr_debug("Send key: 0x%X - Input layer keycode: %d\n",
				 key->code, key->keycode);
			sparse_keymap_report_entry(msi_wmi_input_dev, key, 1,
						   true);
		}
	} else
		pr_info("Unknown event received\n");

msi_wmi_notify_exit:
	kfree(response.pointer);
}

static int __init msi_wmi_backlight_setup(void)
{
	int err;
	struct backlight_properties props;

	memset(&props, 0, sizeof(struct backlight_properties));
	props.type = BACKLIGHT_PLATFORM;
	props.max_brightness = ARRAY_SIZE(backlight_map) - 1;
	backlight = backlight_device_register(DRV_NAME, NULL, NULL,
					      &msi_backlight_ops,
					      &props);
	if (IS_ERR(backlight))
		return PTR_ERR(backlight);

	err = bl_get(NULL);
	if (err < 0) {
		backlight_device_unregister(backlight);
		return err;
	}

	backlight->props.brightness = err;

	return 0;
}

static int __init msi_wmi_input_setup(void)
{
	int err;

	msi_wmi_input_dev = input_allocate_device();
	if (!msi_wmi_input_dev)
		return -ENOMEM;

	msi_wmi_input_dev->name = "MSI WMI hotkeys";
	msi_wmi_input_dev->phys = "wmi/input0";
	msi_wmi_input_dev->id.bustype = BUS_HOST;

	err = sparse_keymap_setup(msi_wmi_input_dev, msi_wmi_keymap, NULL);
	if (err)
		goto err_free_dev;

	err = input_register_device(msi_wmi_input_dev);

	if (err)
		goto err_free_keymap;

	last_pressed = 0;

	return 0;

err_free_keymap:
	sparse_keymap_free(msi_wmi_input_dev);
err_free_dev:
	input_free_device(msi_wmi_input_dev);
	return err;
}

static int __init msi_wmi_init(void)
{
	int err;
	int i;

	for (i = 0; i < ARRAY_SIZE(event_wmis); i++) {
		if (!wmi_has_guid(event_wmis[i].guid))
			continue;

		err = msi_wmi_input_setup();
		if (err) {
			pr_err("Unable to setup input device\n");
			return err;
		}

		err = wmi_install_notify_handler(event_wmis[i].guid,
			msi_wmi_notify, NULL);
		if (ACPI_FAILURE(err)) {
			pr_err("Unable to setup WMI notify handler\n");
			goto err_free_input;
		}

		pr_debug("Event handler installed\n");
		event_wmi = &event_wmis[i];
		break;
	}

	if (wmi_has_guid(MSIWMI_BIOS_GUID) &&
	    acpi_video_get_backlight_type() == acpi_backlight_vendor) {
		err = msi_wmi_backlight_setup();
		if (err) {
			pr_err("Unable to setup backlight device\n");
			goto err_uninstall_handler;
		}
		pr_debug("Backlight device created\n");
	}

	if (!event_wmi && !backlight) {
		pr_err("This machine doesn't have neither MSI-hotkeys nor backlight through WMI\n");
		return -ENODEV;
	}

	return 0;

err_uninstall_handler:
	if (event_wmi)
		wmi_remove_notify_handler(event_wmi->guid);
err_free_input:
	if (event_wmi) {
		sparse_keymap_free(msi_wmi_input_dev);
		input_unregister_device(msi_wmi_input_dev);
	}
	return err;
}

static void __exit msi_wmi_exit(void)
{
	if (event_wmi) {
		wmi_remove_notify_handler(event_wmi->guid);
		sparse_keymap_free(msi_wmi_input_dev);
		input_unregister_device(msi_wmi_input_dev);
	}
	backlight_device_unregister(backlight);
}

module_init(msi_wmi_init);
module_exit(msi_wmi_exit);
Commit	Line	Data
d12d8baf TR	1	/*
	2	* MSI WMI hotkeys
	3	*
	4	* Copyright (C) 2009 Novell <trenn@suse.de>
	5	*
	6	* Most stuff taken over from hp-wmi
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation; either version 2 of the License, or
	11	* (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program; if not, write to the Free Software
	20	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	21	*/
	22
dd3c7f23	23	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
d12d8baf	24
d12d8baf	25	#include <linux/kernel.h>
d12d8baf	26	#include <linux/input.h>
c30116c6	27	#include <linux/input/sparse-keymap.h>
d12d8baf	28	#include <linux/acpi.h>
d12d8baf	29	#include <linux/backlight.h>
5a0e3ad6	30	#include <linux/slab.h>
7c52d551	31	#include <linux/module.h>
33a4edfb	32	#include <acpi/video.h>
d12d8baf TR	33
	34	MODULE_AUTHOR("Thomas Renninger <trenn@suse.de>");
	35	MODULE_DESCRIPTION("MSI laptop WMI hotkeys driver");
	36	MODULE_LICENSE("GPL");
	37
d12d8baf	38	#define DRV_NAME "msi-wmi"
d12d8baf TR	39
d12d8baf TR	40	#define MSIWMI_BIOS_GUID "551A1F84-FBDD-4125-91DB-3EA8F44F1D45"
c11ac2aa MM	41	#define MSIWMI_MSI_EVENT_GUID "B6F3EEF2-3D2F-49DC-9DE3-85BCE18C62F2"
c11ac2aa MM	42	#define MSIWMI_WIND_EVENT_GUID "5B3CC38A-40D9-7245-8AE6-1145B751BE3F"
d12d8baf	43
dd2b0251	44	MODULE_ALIAS("wmi:" MSIWMI_BIOS_GUID);
c11ac2aa MM	45	MODULE_ALIAS("wmi:" MSIWMI_MSI_EVENT_GUID);
c11ac2aa MM	46	MODULE_ALIAS("wmi:" MSIWMI_WIND_EVENT_GUID);
dd2b0251	47
b0d3bb53	48	enum msi_scancodes {
c11ac2aa	49	/* Generic MSI keys (not present on MSI Wind) */
fedda8e7	50	MSI_KEY_BRIGHTNESSUP = 0xD0,
b0d3bb53 MM	51	MSI_KEY_BRIGHTNESSDOWN,
	52	MSI_KEY_VOLUMEUP,
	53	MSI_KEY_VOLUMEDOWN,
	54	MSI_KEY_MUTE,
c11ac2aa MM	55	/* MSI Wind keys */
	56	WIND_KEY_TOUCHPAD = 0x08, /* Fn+F3 touchpad toggle */
	57	WIND_KEY_BLUETOOTH = 0x56, /* Fn+F11 Bluetooth toggle */
	58	WIND_KEY_CAMERA, /* Fn+F6 webcam toggle */
	59	WIND_KEY_WLAN = 0x5f, /* Fn+F11 Wi-Fi toggle */
	60	WIND_KEY_TURBO, /* Fn+F10 turbo mode toggle */
	61	WIND_KEY_ECO = 0x69, /* Fn+F10 ECO mode toggle */
b0d3bb53	62	};
d12d8baf	63	static struct key_entry msi_wmi_keymap[] = {
b0d3bb53 MM	64	{ KE_KEY, MSI_KEY_BRIGHTNESSUP, {KEY_BRIGHTNESSUP} },
	65	{ KE_KEY, MSI_KEY_BRIGHTNESSDOWN, {KEY_BRIGHTNESSDOWN} },
	66	{ KE_KEY, MSI_KEY_VOLUMEUP, {KEY_VOLUMEUP} },
	67	{ KE_KEY, MSI_KEY_VOLUMEDOWN, {KEY_VOLUMEDOWN} },
	68	{ KE_KEY, MSI_KEY_MUTE, {KEY_MUTE} },
c11ac2aa MM	69
	70	/* These keys work without WMI. Ignore them to avoid double keycodes */
	71	{ KE_IGNORE, WIND_KEY_TOUCHPAD, {KEY_TOUCHPAD_TOGGLE} },
	72	{ KE_IGNORE, WIND_KEY_BLUETOOTH, {KEY_BLUETOOTH} },
	73	{ KE_IGNORE, WIND_KEY_CAMERA, {KEY_CAMERA} },
	74	{ KE_IGNORE, WIND_KEY_WLAN, {KEY_WLAN} },
	75
	76	/* These are unknown WMI events found on MSI Wind */
	77	{ KE_IGNORE, 0x00 },
	78	{ KE_IGNORE, 0x62 },
	79	{ KE_IGNORE, 0x63 },
	80
	81	/* These are MSI Wind keys that should be handled via WMI */
	82	{ KE_KEY, WIND_KEY_TURBO, {KEY_PROG1} },
	83	{ KE_KEY, WIND_KEY_ECO, {KEY_PROG2} },
	84
b0d3bb53	85	{ KE_END, 0 }
d12d8baf	86	};
fedda8e7 MM	87
fedda8e7 MM	88	static ktime_t last_pressed;
d12d8baf	89
c11ac2aa MM	90	static const struct {
	91	const char *guid;
	92	bool quirk_last_pressed;
	93	} *event_wmi, event_wmis[] = {
	94	{ MSIWMI_MSI_EVENT_GUID, true },
	95	{ MSIWMI_WIND_EVENT_GUID, false },
	96	};
da850628	97
8700e161	98	static struct backlight_device *backlight;
d12d8baf TR	99
	100	static int backlight_map[] = { 0x00, 0x33, 0x66, 0x99, 0xCC, 0xFF };
	101
	102	static struct input_dev *msi_wmi_input_dev;
	103
	104	static int msi_wmi_query_block(int instance, int *ret)
	105	{
	106	acpi_status status;
	107	union acpi_object *obj;
	108
	109	struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
	110
	111	status = wmi_query_block(MSIWMI_BIOS_GUID, instance, &output);
	112
	113	obj = output.pointer;
	114
	115	if (!obj \|\| obj->type != ACPI_TYPE_INTEGER) {
	116	if (obj) {
dd3c7f23	117	pr_err("query block returned object "
d12d8baf TR	118	"type: %d - buffer length:%d\n", obj->type,
	119	obj->type == ACPI_TYPE_BUFFER ?
	120	obj->buffer.length : 0);
	121	}
	122	kfree(obj);
	123	return -EINVAL;
	124	}
	125	*ret = obj->integer.value;
	126	kfree(obj);
	127	return 0;
	128	}
	129
	130	static int msi_wmi_set_block(int instance, int value)
	131	{
	132	acpi_status status;
	133
	134	struct acpi_buffer input = { sizeof(int), &value };
	135
dd3c7f23 JP	136	pr_debug("Going to set block of instance: %d - value: %d\n",
dd3c7f23 JP	137	instance, value);
d12d8baf TR	138
	139	status = wmi_set_block(MSIWMI_BIOS_GUID, instance, &input);
	140
	141	return ACPI_SUCCESS(status) ? 0 : 1;
	142	}
	143
	144	static int bl_get(struct backlight_device *bd)
	145	{
de078e57	146	int level, err, ret;
d12d8baf TR	147
	148	/* Instance 1 is "get backlight", cmp with DSDT */
	149	err = msi_wmi_query_block(1, &ret);
de078e57	150	if (err) {
dd3c7f23	151	pr_err("Could not query backlight: %d\n", err);
de078e57 AA	152	return -EINVAL;
de078e57 AA	153	}
dd3c7f23	154	pr_debug("Get: Query block returned: %d\n", ret);
d12d8baf TR	155	for (level = 0; level < ARRAY_SIZE(backlight_map); level++) {
d12d8baf TR	156	if (backlight_map[level] == ret) {
dd3c7f23 JP	157	pr_debug("Current backlight level: 0x%X - index: %d\n",
dd3c7f23 JP	158	backlight_map[level], level);
d12d8baf TR	159	break;
	160	}
	161	}
	162	if (level == ARRAY_SIZE(backlight_map)) {
dd3c7f23	163	pr_err("get: Invalid brightness value: 0x%X\n", ret);
d12d8baf TR	164	return -EINVAL;
	165	}
	166	return level;
	167	}
	168
	169	static int bl_set_status(struct backlight_device *bd)
	170	{
	171	int bright = bd->props.brightness;
	172	if (bright >= ARRAY_SIZE(backlight_map) \|\| bright < 0)
	173	return -EINVAL;
	174
	175	/* Instance 0 is "set backlight" */
	176	return msi_wmi_set_block(0, backlight_map[bright]);
	177	}
	178
28d85873	179	static const struct backlight_ops msi_backlight_ops = {
d12d8baf TR	180	.get_brightness = bl_get,
	181	.update_status = bl_set_status,
	182	};
	183
d12d8baf TR	184	static void msi_wmi_notify(u32 value, void *context)
	185	{
	186	struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
	187	static struct key_entry *key;
	188	union acpi_object *obj;
fda11e61	189	acpi_status status;
d12d8baf	190
fda11e61 LB	191	status = wmi_get_event_data(value, &response);
fda11e61 LB	192	if (status != AE_OK) {
dd3c7f23	193	pr_info("bad event status 0x%x\n", status);
fda11e61 LB	194	return;
fda11e61 LB	195	}
d12d8baf TR	196
	197	obj = (union acpi_object *)response.pointer;
	198
	199	if (obj && obj->type == ACPI_TYPE_INTEGER) {
	200	int eventcode = obj->integer.value;
dd3c7f23	201	pr_debug("Eventcode: 0x%x\n", eventcode);
c30116c6 AA	202	key = sparse_keymap_entry_from_scancode(msi_wmi_input_dev,
c30116c6 AA	203	eventcode);
fedda8e7 MM	204	if (!key) {
	205	pr_info("Unknown key pressed - %x\n", eventcode);
	206	goto msi_wmi_notify_exit;
	207	}
	208
c11ac2aa	209	if (event_wmi->quirk_last_pressed) {
fedda8e7 MM	210	ktime_t cur = ktime_get_real();
	211	ktime_t diff = ktime_sub(cur, last_pressed);
	212	/* Ignore event if any event happened in a 50 ms
d12d8baf	213	timeframe -> Key press may result in 10-20 GPEs */
c30116c6	214	if (ktime_to_us(diff) < 1000 * 50) {
dd3c7f23 JP	215	pr_debug("Suppressed key event 0x%X - "
dd3c7f23 JP	216	"Last press was %lld us ago\n",
c30116c6	217	key->code, ktime_to_us(diff));
51c94491	218	goto msi_wmi_notify_exit;
d12d8baf	219	}
fedda8e7 MM	220	last_pressed = cur;
	221	}
	222
	223	if (key->type == KE_KEY &&
	224	/* Brightness is served via acpi video driver */
	225	(backlight \|\|
	226	(key->code != MSI_KEY_BRIGHTNESSUP &&
	227	key->code != MSI_KEY_BRIGHTNESSDOWN))) {
	228	pr_debug("Send key: 0x%X - Input layer keycode: %d\n",
	229	key->code, key->keycode);
	230	sparse_keymap_report_entry(msi_wmi_input_dev, key, 1,
	231	true);
	232	}
d12d8baf	233	} else
dd3c7f23	234	pr_info("Unknown event received\n");
51c94491 MM	235
51c94491 MM	236	msi_wmi_notify_exit:
d12d8baf TR	237	kfree(response.pointer);
	238	}
	239
da850628 MM	240	static int __init msi_wmi_backlight_setup(void)
	241	{
	242	int err;
	243	struct backlight_properties props;
	244
	245	memset(&props, 0, sizeof(struct backlight_properties));
	246	props.type = BACKLIGHT_PLATFORM;
	247	props.max_brightness = ARRAY_SIZE(backlight_map) - 1;
	248	backlight = backlight_device_register(DRV_NAME, NULL, NULL,
	249	&msi_backlight_ops,
	250	&props);
	251	if (IS_ERR(backlight))
	252	return PTR_ERR(backlight);
	253
	254	err = bl_get(NULL);
	255	if (err < 0) {
	256	backlight_device_unregister(backlight);
	257	return err;
	258	}
	259
	260	backlight->props.brightness = err;
	261
	262	return 0;
	263	}
	264
d12d8baf TR	265	static int __init msi_wmi_input_setup(void)
d12d8baf TR	266	{
d12d8baf TR	267	int err;
	268
	269	msi_wmi_input_dev = input_allocate_device();
46b51eb9 AA	270	if (!msi_wmi_input_dev)
46b51eb9 AA	271	return -ENOMEM;
d12d8baf TR	272
	273	msi_wmi_input_dev->name = "MSI WMI hotkeys";
	274	msi_wmi_input_dev->phys = "wmi/input0";
	275	msi_wmi_input_dev->id.bustype = BUS_HOST;
c30116c6 AA	276
	277	err = sparse_keymap_setup(msi_wmi_input_dev, msi_wmi_keymap, NULL);
	278	if (err)
	279	goto err_free_dev;
d12d8baf TR	280
	281	err = input_register_device(msi_wmi_input_dev);
	282
c30116c6 AA	283	if (err)
	284	goto err_free_keymap;
	285
8b0e1953	286	last_pressed = 0;
d12d8baf TR	287
d12d8baf TR	288	return 0;
c30116c6 AA	289
	290	err_free_keymap:
	291	sparse_keymap_free(msi_wmi_input_dev);
	292	err_free_dev:
	293	input_free_device(msi_wmi_input_dev);
	294	return err;
d12d8baf TR	295	}
	296
	297	static int __init msi_wmi_init(void)
	298	{
	299	int err;
c11ac2aa MM	300	int i;
	301
	302	for (i = 0; i < ARRAY_SIZE(event_wmis); i++) {
	303	if (!wmi_has_guid(event_wmis[i].guid))
	304	continue;
d12d8baf	305
da850628 MM	306	err = msi_wmi_input_setup();
	307	if (err) {
	308	pr_err("Unable to setup input device\n");
	309	return err;
	310	}
d12d8baf	311
c11ac2aa	312	err = wmi_install_notify_handler(event_wmis[i].guid,
da850628 MM	313	msi_wmi_notify, NULL);
	314	if (ACPI_FAILURE(err)) {
	315	pr_err("Unable to setup WMI notify handler\n");
46b51eb9	316	goto err_free_input;
28d85873	317	}
46b51eb9	318
da850628	319	pr_debug("Event handler installed\n");
c11ac2aa MM	320	event_wmi = &event_wmis[i];
c11ac2aa MM	321	break;
da850628 MM	322	}
da850628 MM	323
33a4edfb HG	324	if (wmi_has_guid(MSIWMI_BIOS_GUID) &&
33a4edfb HG	325	acpi_video_get_backlight_type() == acpi_backlight_vendor) {
da850628 MM	326	err = msi_wmi_backlight_setup();
	327	if (err) {
	328	pr_err("Unable to setup backlight device\n");
	329	goto err_uninstall_handler;
	330	}
	331	pr_debug("Backlight device created\n");
	332	}
46b51eb9	333
c11ac2aa	334	if (!event_wmi && !backlight) {
da850628 MM	335	pr_err("This machine doesn't have neither MSI-hotkeys nor backlight through WMI\n");
da850628 MM	336	return -ENODEV;
d12d8baf	337	}
46b51eb9	338
d12d8baf	339	return 0;
46b51eb9	340
da850628	341	err_uninstall_handler:
c11ac2aa MM	342	if (event_wmi)
c11ac2aa MM	343	wmi_remove_notify_handler(event_wmi->guid);
46b51eb9	344	err_free_input:
c11ac2aa	345	if (event_wmi) {
da850628 MM	346	sparse_keymap_free(msi_wmi_input_dev);
	347	input_unregister_device(msi_wmi_input_dev);
	348	}
46b51eb9	349	return err;
d12d8baf TR	350	}
	351
	352	static void __exit msi_wmi_exit(void)
	353	{
c11ac2aa MM	354	if (event_wmi) {
c11ac2aa MM	355	wmi_remove_notify_handler(event_wmi->guid);
c30116c6	356	sparse_keymap_free(msi_wmi_input_dev);
d12d8baf	357	input_unregister_device(msi_wmi_input_dev);
d12d8baf	358	}
00981810	359	backlight_device_unregister(backlight);
d12d8baf TR	360	}
	361
	362	module_init(msi_wmi_init);
	363	module_exit(msi_wmi_exit);