[linux-block.git] / drivers / platform / x86 / msi-wmi.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * MSI WMI hotkeys
 *
 * Copyright (C) 2009 Novell <trenn@suse.de>
 *
 * Most stuff taken over from hp-wmi
 */

#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 };
	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_dev;

	last_pressed = 0;

	return 0;

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)
		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);
		input_unregister_device(msi_wmi_input_dev);
	}
	backlight_device_unregister(backlight);
}

module_init(msi_wmi_init);
module_exit(msi_wmi_exit);
Commit	Line	Data
1a59d1b8	1	// SPDX-License-Identifier: GPL-2.0-or-later
d12d8baf TR	2	/*
	3	* MSI WMI hotkeys
	4	*
	5	* Copyright (C) 2009 Novell <trenn@suse.de>
	6	*
	7	* Most stuff taken over from hp-wmi
d12d8baf TR	8	*/
d12d8baf TR	9
dd3c7f23	10	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
d12d8baf	11
d12d8baf	12	#include <linux/kernel.h>
d12d8baf	13	#include <linux/input.h>
c30116c6	14	#include <linux/input/sparse-keymap.h>
d12d8baf	15	#include <linux/acpi.h>
d12d8baf	16	#include <linux/backlight.h>
5a0e3ad6	17	#include <linux/slab.h>
7c52d551	18	#include <linux/module.h>
33a4edfb	19	#include <acpi/video.h>
d12d8baf TR	20
	21	MODULE_AUTHOR("Thomas Renninger <trenn@suse.de>");
	22	MODULE_DESCRIPTION("MSI laptop WMI hotkeys driver");
	23	MODULE_LICENSE("GPL");
	24
d12d8baf	25	#define DRV_NAME "msi-wmi"
d12d8baf TR	26
d12d8baf TR	27	#define MSIWMI_BIOS_GUID "551A1F84-FBDD-4125-91DB-3EA8F44F1D45"
c11ac2aa MM	28	#define MSIWMI_MSI_EVENT_GUID "B6F3EEF2-3D2F-49DC-9DE3-85BCE18C62F2"
c11ac2aa MM	29	#define MSIWMI_WIND_EVENT_GUID "5B3CC38A-40D9-7245-8AE6-1145B751BE3F"
d12d8baf	30
dd2b0251	31	MODULE_ALIAS("wmi:" MSIWMI_BIOS_GUID);
c11ac2aa MM	32	MODULE_ALIAS("wmi:" MSIWMI_MSI_EVENT_GUID);
c11ac2aa MM	33	MODULE_ALIAS("wmi:" MSIWMI_WIND_EVENT_GUID);
dd2b0251	34
b0d3bb53	35	enum msi_scancodes {
c11ac2aa	36	/* Generic MSI keys (not present on MSI Wind) */
fedda8e7	37	MSI_KEY_BRIGHTNESSUP = 0xD0,
b0d3bb53 MM	38	MSI_KEY_BRIGHTNESSDOWN,
	39	MSI_KEY_VOLUMEUP,
	40	MSI_KEY_VOLUMEDOWN,
	41	MSI_KEY_MUTE,
c11ac2aa MM	42	/* MSI Wind keys */
	43	WIND_KEY_TOUCHPAD = 0x08, /* Fn+F3 touchpad toggle */
	44	WIND_KEY_BLUETOOTH = 0x56, /* Fn+F11 Bluetooth toggle */
	45	WIND_KEY_CAMERA, /* Fn+F6 webcam toggle */
	46	WIND_KEY_WLAN = 0x5f, /* Fn+F11 Wi-Fi toggle */
	47	WIND_KEY_TURBO, /* Fn+F10 turbo mode toggle */
	48	WIND_KEY_ECO = 0x69, /* Fn+F10 ECO mode toggle */
b0d3bb53	49	};
d12d8baf	50	static struct key_entry msi_wmi_keymap[] = {
b0d3bb53 MM	51	{ KE_KEY, MSI_KEY_BRIGHTNESSUP, {KEY_BRIGHTNESSUP} },
	52	{ KE_KEY, MSI_KEY_BRIGHTNESSDOWN, {KEY_BRIGHTNESSDOWN} },
	53	{ KE_KEY, MSI_KEY_VOLUMEUP, {KEY_VOLUMEUP} },
	54	{ KE_KEY, MSI_KEY_VOLUMEDOWN, {KEY_VOLUMEDOWN} },
	55	{ KE_KEY, MSI_KEY_MUTE, {KEY_MUTE} },
c11ac2aa MM	56
	57	/* These keys work without WMI. Ignore them to avoid double keycodes */
	58	{ KE_IGNORE, WIND_KEY_TOUCHPAD, {KEY_TOUCHPAD_TOGGLE} },
	59	{ KE_IGNORE, WIND_KEY_BLUETOOTH, {KEY_BLUETOOTH} },
	60	{ KE_IGNORE, WIND_KEY_CAMERA, {KEY_CAMERA} },
	61	{ KE_IGNORE, WIND_KEY_WLAN, {KEY_WLAN} },
	62
	63	/* These are unknown WMI events found on MSI Wind */
	64	{ KE_IGNORE, 0x00 },
	65	{ KE_IGNORE, 0x62 },
	66	{ KE_IGNORE, 0x63 },
	67
	68	/* These are MSI Wind keys that should be handled via WMI */
	69	{ KE_KEY, WIND_KEY_TURBO, {KEY_PROG1} },
	70	{ KE_KEY, WIND_KEY_ECO, {KEY_PROG2} },
	71
b0d3bb53	72	{ KE_END, 0 }
d12d8baf	73	};
fedda8e7 MM	74
fedda8e7 MM	75	static ktime_t last_pressed;
d12d8baf	76
c11ac2aa MM	77	static const struct {
	78	const char *guid;
	79	bool quirk_last_pressed;
	80	} *event_wmi, event_wmis[] = {
	81	{ MSIWMI_MSI_EVENT_GUID, true },
	82	{ MSIWMI_WIND_EVENT_GUID, false },
	83	};
da850628	84
8700e161	85	static struct backlight_device *backlight;
d12d8baf TR	86
	87	static int backlight_map[] = { 0x00, 0x33, 0x66, 0x99, 0xCC, 0xFF };
	88
	89	static struct input_dev *msi_wmi_input_dev;
	90
	91	static int msi_wmi_query_block(int instance, int *ret)
	92	{
	93	acpi_status status;
	94	union acpi_object *obj;
	95
	96	struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
	97
	98	status = wmi_query_block(MSIWMI_BIOS_GUID, instance, &output);
	99
	100	obj = output.pointer;
	101
	102	if (!obj \|\| obj->type != ACPI_TYPE_INTEGER) {
	103	if (obj) {
dd3c7f23	104	pr_err("query block returned object "
d12d8baf TR	105	"type: %d - buffer length:%d\n", obj->type,
	106	obj->type == ACPI_TYPE_BUFFER ?
	107	obj->buffer.length : 0);
	108	}
	109	kfree(obj);
	110	return -EINVAL;
	111	}
	112	*ret = obj->integer.value;
	113	kfree(obj);
	114	return 0;
	115	}
	116
	117	static int msi_wmi_set_block(int instance, int value)
	118	{
	119	acpi_status status;
	120
	121	struct acpi_buffer input = { sizeof(int), &value };
	122
dd3c7f23 JP	123	pr_debug("Going to set block of instance: %d - value: %d\n",
dd3c7f23 JP	124	instance, value);
d12d8baf TR	125
	126	status = wmi_set_block(MSIWMI_BIOS_GUID, instance, &input);
	127
	128	return ACPI_SUCCESS(status) ? 0 : 1;
	129	}
	130
	131	static int bl_get(struct backlight_device *bd)
	132	{
de078e57	133	int level, err, ret;
d12d8baf TR	134
	135	/* Instance 1 is "get backlight", cmp with DSDT */
	136	err = msi_wmi_query_block(1, &ret);
de078e57	137	if (err) {
dd3c7f23	138	pr_err("Could not query backlight: %d\n", err);
de078e57 AA	139	return -EINVAL;
de078e57 AA	140	}
dd3c7f23	141	pr_debug("Get: Query block returned: %d\n", ret);
d12d8baf TR	142	for (level = 0; level < ARRAY_SIZE(backlight_map); level++) {
d12d8baf TR	143	if (backlight_map[level] == ret) {
dd3c7f23 JP	144	pr_debug("Current backlight level: 0x%X - index: %d\n",
dd3c7f23 JP	145	backlight_map[level], level);
d12d8baf TR	146	break;
	147	}
	148	}
	149	if (level == ARRAY_SIZE(backlight_map)) {
dd3c7f23	150	pr_err("get: Invalid brightness value: 0x%X\n", ret);
d12d8baf TR	151	return -EINVAL;
	152	}
	153	return level;
	154	}
	155
	156	static int bl_set_status(struct backlight_device *bd)
	157	{
	158	int bright = bd->props.brightness;
	159	if (bright >= ARRAY_SIZE(backlight_map) \|\| bright < 0)
	160	return -EINVAL;
	161
	162	/* Instance 0 is "set backlight" */
	163	return msi_wmi_set_block(0, backlight_map[bright]);
	164	}
	165
28d85873	166	static const struct backlight_ops msi_backlight_ops = {
d12d8baf TR	167	.get_brightness = bl_get,
	168	.update_status = bl_set_status,
	169	};
	170
d12d8baf TR	171	static void msi_wmi_notify(u32 value, void *context)
	172	{
	173	struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
6d8d5562	174	struct key_entry *key;
d12d8baf	175	union acpi_object *obj;
fda11e61	176	acpi_status status;
d12d8baf	177
fda11e61 LB	178	status = wmi_get_event_data(value, &response);
fda11e61 LB	179	if (status != AE_OK) {
dd3c7f23	180	pr_info("bad event status 0x%x\n", status);
fda11e61 LB	181	return;
fda11e61 LB	182	}
d12d8baf TR	183
	184	obj = (union acpi_object *)response.pointer;
	185
	186	if (obj && obj->type == ACPI_TYPE_INTEGER) {
	187	int eventcode = obj->integer.value;
dd3c7f23	188	pr_debug("Eventcode: 0x%x\n", eventcode);
c30116c6 AA	189	key = sparse_keymap_entry_from_scancode(msi_wmi_input_dev,
c30116c6 AA	190	eventcode);
fedda8e7 MM	191	if (!key) {
	192	pr_info("Unknown key pressed - %x\n", eventcode);
	193	goto msi_wmi_notify_exit;
	194	}
	195
c11ac2aa	196	if (event_wmi->quirk_last_pressed) {
fedda8e7 MM	197	ktime_t cur = ktime_get_real();
	198	ktime_t diff = ktime_sub(cur, last_pressed);
	199	/* Ignore event if any event happened in a 50 ms
d12d8baf	200	timeframe -> Key press may result in 10-20 GPEs */
c30116c6	201	if (ktime_to_us(diff) < 1000 * 50) {
dd3c7f23 JP	202	pr_debug("Suppressed key event 0x%X - "
dd3c7f23 JP	203	"Last press was %lld us ago\n",
c30116c6	204	key->code, ktime_to_us(diff));
51c94491	205	goto msi_wmi_notify_exit;
d12d8baf	206	}
fedda8e7 MM	207	last_pressed = cur;
	208	}
	209
	210	if (key->type == KE_KEY &&
	211	/* Brightness is served via acpi video driver */
	212	(backlight \|\|
	213	(key->code != MSI_KEY_BRIGHTNESSUP &&
	214	key->code != MSI_KEY_BRIGHTNESSDOWN))) {
	215	pr_debug("Send key: 0x%X - Input layer keycode: %d\n",
	216	key->code, key->keycode);
	217	sparse_keymap_report_entry(msi_wmi_input_dev, key, 1,
	218	true);
	219	}
d12d8baf	220	} else
dd3c7f23	221	pr_info("Unknown event received\n");
51c94491 MM	222
51c94491 MM	223	msi_wmi_notify_exit:
d12d8baf TR	224	kfree(response.pointer);
	225	}
	226
da850628 MM	227	static int __init msi_wmi_backlight_setup(void)
	228	{
	229	int err;
	230	struct backlight_properties props;
	231
	232	memset(&props, 0, sizeof(struct backlight_properties));
	233	props.type = BACKLIGHT_PLATFORM;
	234	props.max_brightness = ARRAY_SIZE(backlight_map) - 1;
	235	backlight = backlight_device_register(DRV_NAME, NULL, NULL,
	236	&msi_backlight_ops,
	237	&props);
	238	if (IS_ERR(backlight))
	239	return PTR_ERR(backlight);
	240
	241	err = bl_get(NULL);
	242	if (err < 0) {
	243	backlight_device_unregister(backlight);
	244	return err;
	245	}
	246
	247	backlight->props.brightness = err;
	248
	249	return 0;
	250	}
	251
d12d8baf TR	252	static int __init msi_wmi_input_setup(void)
d12d8baf TR	253	{
d12d8baf TR	254	int err;
	255
	256	msi_wmi_input_dev = input_allocate_device();
46b51eb9 AA	257	if (!msi_wmi_input_dev)
46b51eb9 AA	258	return -ENOMEM;
d12d8baf TR	259
	260	msi_wmi_input_dev->name = "MSI WMI hotkeys";
	261	msi_wmi_input_dev->phys = "wmi/input0";
	262	msi_wmi_input_dev->id.bustype = BUS_HOST;
c30116c6 AA	263
	264	err = sparse_keymap_setup(msi_wmi_input_dev, msi_wmi_keymap, NULL);
	265	if (err)
	266	goto err_free_dev;
d12d8baf TR	267
	268	err = input_register_device(msi_wmi_input_dev);
	269
c30116c6	270	if (err)
0788e337	271	goto err_free_dev;
c30116c6	272
8b0e1953	273	last_pressed = 0;
d12d8baf TR	274
d12d8baf TR	275	return 0;
c30116c6	276
c30116c6 AA	277	err_free_dev:
	278	input_free_device(msi_wmi_input_dev);
	279	return err;
d12d8baf TR	280	}
	281
	282	static int __init msi_wmi_init(void)
	283	{
	284	int err;
c11ac2aa MM	285	int i;
	286
	287	for (i = 0; i < ARRAY_SIZE(event_wmis); i++) {
	288	if (!wmi_has_guid(event_wmis[i].guid))
	289	continue;
d12d8baf	290
da850628 MM	291	err = msi_wmi_input_setup();
	292	if (err) {
	293	pr_err("Unable to setup input device\n");
	294	return err;
	295	}
d12d8baf	296
c11ac2aa	297	err = wmi_install_notify_handler(event_wmis[i].guid,
da850628 MM	298	msi_wmi_notify, NULL);
	299	if (ACPI_FAILURE(err)) {
	300	pr_err("Unable to setup WMI notify handler\n");
46b51eb9	301	goto err_free_input;
28d85873	302	}
46b51eb9	303
da850628	304	pr_debug("Event handler installed\n");
c11ac2aa MM	305	event_wmi = &event_wmis[i];
c11ac2aa MM	306	break;
da850628 MM	307	}
da850628 MM	308
33a4edfb HG	309	if (wmi_has_guid(MSIWMI_BIOS_GUID) &&
33a4edfb HG	310	acpi_video_get_backlight_type() == acpi_backlight_vendor) {
da850628 MM	311	err = msi_wmi_backlight_setup();
	312	if (err) {
	313	pr_err("Unable to setup backlight device\n");
	314	goto err_uninstall_handler;
	315	}
	316	pr_debug("Backlight device created\n");
	317	}
46b51eb9	318
c11ac2aa	319	if (!event_wmi && !backlight) {
da850628 MM	320	pr_err("This machine doesn't have neither MSI-hotkeys nor backlight through WMI\n");
da850628 MM	321	return -ENODEV;
d12d8baf	322	}
46b51eb9	323
d12d8baf	324	return 0;
46b51eb9	325
da850628	326	err_uninstall_handler:
c11ac2aa MM	327	if (event_wmi)
c11ac2aa MM	328	wmi_remove_notify_handler(event_wmi->guid);
46b51eb9	329	err_free_input:
0788e337	330	if (event_wmi)
da850628	331	input_unregister_device(msi_wmi_input_dev);
46b51eb9	332	return err;
d12d8baf TR	333	}
	334
	335	static void __exit msi_wmi_exit(void)
	336	{
c11ac2aa MM	337	if (event_wmi) {
c11ac2aa MM	338	wmi_remove_notify_handler(event_wmi->guid);
d12d8baf	339	input_unregister_device(msi_wmi_input_dev);
d12d8baf	340	}
00981810	341	backlight_device_unregister(backlight);
d12d8baf TR	342	}
	343
	344	module_init(msi_wmi_init);
	345	module_exit(msi_wmi_exit);