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

/*
 * ACPI driver for Topstar notebooks (hotkeys support only)
 *
 * Copyright (c) 2009 Herton Ronaldo Krzesinski <herton@mandriva.com.br>
 *
 * Implementation inspired by existing x86 platform drivers, in special
 * asus/eepc/fujitsu-laptop, thanks to their authors
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/acpi.h>
#include <linux/input.h>

#define ACPI_TOPSTAR_CLASS "topstar"

struct topstar_hkey {
	struct input_dev *inputdev;
};

struct tps_key_entry {
	u8 code;
	u16 keycode;
};

static struct tps_key_entry topstar_keymap[] = {
	{ 0x80, KEY_BRIGHTNESSUP },
	{ 0x81, KEY_BRIGHTNESSDOWN },
	{ 0x83, KEY_VOLUMEUP },
	{ 0x84, KEY_VOLUMEDOWN },
	{ 0x85, KEY_MUTE },
	{ 0x86, KEY_SWITCHVIDEOMODE },
	{ 0x87, KEY_F13 }, /* touchpad enable/disable key */
	{ 0x88, KEY_WLAN },
	{ 0x8a, KEY_WWW },
	{ 0x8b, KEY_MAIL },
	{ 0x8c, KEY_MEDIA },
	{ 0x96, KEY_F14 }, /* G key? */
	{ }
};

static struct tps_key_entry *tps_get_key_by_scancode(unsigned int code)
{
	struct tps_key_entry *key;

	for (key = topstar_keymap; key->code; key++)
		if (code == key->code)
			return key;

	return NULL;
}

static struct tps_key_entry *tps_get_key_by_keycode(unsigned int code)
{
	struct tps_key_entry *key;

	for (key = topstar_keymap; key->code; key++)
		if (code == key->keycode)
			return key;

	return NULL;
}

static void acpi_topstar_notify(struct acpi_device *device, u32 event)
{
	struct tps_key_entry *key;
	static bool dup_evnt[2];
	bool *dup;
	struct topstar_hkey *hkey = acpi_driver_data(device);

	/* 0x83 and 0x84 key events comes duplicated... */
	if (event == 0x83 || event == 0x84) {
		dup = &dup_evnt[event - 0x83];
		if (*dup) {
			*dup = false;
			return;
		}
		*dup = true;
	}

	/*
	 * 'G key' generate two event codes, convert to only
	 * one event/key code for now (3G switch?)
	 */
	if (event == 0x97)
		event = 0x96;

	key = tps_get_key_by_scancode(event);
	if (key) {
		input_report_key(hkey->inputdev, key->keycode, 1);
		input_sync(hkey->inputdev);
		input_report_key(hkey->inputdev, key->keycode, 0);
		input_sync(hkey->inputdev);
		return;
	}

	/* Known non hotkey events don't handled or that we don't care yet */
	if (event == 0x8e || event == 0x8f || event == 0x90)
		return;

	pr_info("unknown event = 0x%02x\n", event);
}

static int acpi_topstar_fncx_switch(struct acpi_device *device, bool state)
{
	acpi_status status;
	union acpi_object fncx_params[1] = {
		{ .type = ACPI_TYPE_INTEGER }
	};
	struct acpi_object_list fncx_arg_list = { 1, &fncx_params[0] };

	fncx_params[0].integer.value = state ? 0x86 : 0x87;
	status = acpi_evaluate_object(device->handle, "FNCX", &fncx_arg_list, NULL);
	if (ACPI_FAILURE(status)) {
		pr_err("Unable to switch FNCX notifications\n");
		return -ENODEV;
	}

	return 0;
}

static int topstar_getkeycode(struct input_dev *dev,
				unsigned int scancode, unsigned int *keycode)
{
	struct tps_key_entry *key = tps_get_key_by_scancode(scancode);

	if (!key)
		return -EINVAL;

	*keycode = key->keycode;
	return 0;
}

static int topstar_setkeycode(struct input_dev *dev,
				unsigned int scancode, unsigned int keycode)
{
	struct tps_key_entry *key;
	int old_keycode;

	key = tps_get_key_by_scancode(scancode);

	if (!key)
		return -EINVAL;

	old_keycode = key->keycode;
	key->keycode = keycode;
	set_bit(keycode, dev->keybit);
	if (!tps_get_key_by_keycode(old_keycode))
		clear_bit(old_keycode, dev->keybit);
	return 0;
}

static int acpi_topstar_init_hkey(struct topstar_hkey *hkey)
{
	struct tps_key_entry *key;

	hkey->inputdev = input_allocate_device();
	if (!hkey->inputdev) {
		pr_err("Unable to allocate input device\n");
		return -ENODEV;
	}
	hkey->inputdev->name = "Topstar Laptop extra buttons";
	hkey->inputdev->phys = "topstar/input0";
	hkey->inputdev->id.bustype = BUS_HOST;
	hkey->inputdev->getkeycode = topstar_getkeycode;
	hkey->inputdev->setkeycode = topstar_setkeycode;
	for (key = topstar_keymap; key->code; key++) {
		set_bit(EV_KEY, hkey->inputdev->evbit);
		set_bit(key->keycode, hkey->inputdev->keybit);
	}
	if (input_register_device(hkey->inputdev)) {
		pr_err("Unable to register input device\n");
		input_free_device(hkey->inputdev);
		return -ENODEV;
	}

	return 0;
}

static int acpi_topstar_add(struct acpi_device *device)
{
	struct topstar_hkey *tps_hkey;

	tps_hkey = kzalloc(sizeof(struct topstar_hkey), GFP_KERNEL);
	if (!tps_hkey)
		return -ENOMEM;

	strcpy(acpi_device_name(device), "Topstar TPSACPI");
	strcpy(acpi_device_class(device), ACPI_TOPSTAR_CLASS);

	if (acpi_topstar_fncx_switch(device, true))
		goto add_err;

	if (acpi_topstar_init_hkey(tps_hkey))
		goto add_err;

	device->driver_data = tps_hkey;
	return 0;

add_err:
	kfree(tps_hkey);
	return -ENODEV;
}

static int acpi_topstar_remove(struct acpi_device *device, int type)
{
	struct topstar_hkey *tps_hkey = acpi_driver_data(device);

	acpi_topstar_fncx_switch(device, false);

	input_unregister_device(tps_hkey->inputdev);
	kfree(tps_hkey);

	return 0;
}

static const struct acpi_device_id topstar_device_ids[] = {
	{ "TPSACPI01", 0 },
	{ "", 0 },
};
MODULE_DEVICE_TABLE(acpi, topstar_device_ids);

static struct acpi_driver acpi_topstar_driver = {
	.name = "Topstar laptop ACPI driver",
	.class = ACPI_TOPSTAR_CLASS,
	.ids = topstar_device_ids,
	.ops = {
		.add = acpi_topstar_add,
		.remove = acpi_topstar_remove,
		.notify = acpi_topstar_notify,
	},
};

static int __init topstar_laptop_init(void)
{
	int ret;

	ret = acpi_bus_register_driver(&acpi_topstar_driver);
	if (ret < 0)
		return ret;

	printk(KERN_INFO "Topstar Laptop ACPI extras driver loaded\n");

	return 0;
}

static void __exit topstar_laptop_exit(void)
{
	acpi_bus_unregister_driver(&acpi_topstar_driver);
}

module_init(topstar_laptop_init);
module_exit(topstar_laptop_exit);

MODULE_AUTHOR("Herton Ronaldo Krzesinski");
MODULE_DESCRIPTION("Topstar Laptop ACPI Extras driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
9caeb532 HRK	1	/*
	2	* ACPI driver for Topstar notebooks (hotkeys support only)
	3	*
	4	* Copyright (c) 2009 Herton Ronaldo Krzesinski <herton@mandriva.com.br>
	5	*
	6	* Implementation inspired by existing x86 platform drivers, in special
	7	* asus/eepc/fujitsu-laptop, thanks to their authors
	8	*
	9	* This program is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License version 2 as
	11	* published by the Free Software Foundation.
	12	*/
	13
	14	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
	15
	16	#include <linux/kernel.h>
	17	#include <linux/module.h>
	18	#include <linux/init.h>
	19	#include <linux/acpi.h>
	20	#include <linux/input.h>
	21
	22	#define ACPI_TOPSTAR_CLASS "topstar"
	23
	24	struct topstar_hkey {
	25	struct input_dev *inputdev;
	26	};
	27
	28	struct tps_key_entry {
	29	u8 code;
	30	u16 keycode;
	31	};
	32
	33	static struct tps_key_entry topstar_keymap[] = {
	34	{ 0x80, KEY_BRIGHTNESSUP },
	35	{ 0x81, KEY_BRIGHTNESSDOWN },
	36	{ 0x83, KEY_VOLUMEUP },
	37	{ 0x84, KEY_VOLUMEDOWN },
	38	{ 0x85, KEY_MUTE },
	39	{ 0x86, KEY_SWITCHVIDEOMODE },
	40	{ 0x87, KEY_F13 }, /* touchpad enable/disable key */
	41	{ 0x88, KEY_WLAN },
	42	{ 0x8a, KEY_WWW },
	43	{ 0x8b, KEY_MAIL },
	44	{ 0x8c, KEY_MEDIA },
	45	{ 0x96, KEY_F14 }, /* G key? */
	46	{ }
	47	};
	48
58b93995	49	static struct tps_key_entry *tps_get_key_by_scancode(unsigned int code)
9caeb532 HRK	50	{
	51	struct tps_key_entry *key;
	52
	53	for (key = topstar_keymap; key->code; key++)
	54	if (code == key->code)
	55	return key;
	56
	57	return NULL;
	58	}
	59
58b93995	60	static struct tps_key_entry *tps_get_key_by_keycode(unsigned int code)
9caeb532 HRK	61	{
	62	struct tps_key_entry *key;
	63
	64	for (key = topstar_keymap; key->code; key++)
	65	if (code == key->keycode)
	66	return key;
	67
	68	return NULL;
	69	}
	70
	71	static void acpi_topstar_notify(struct acpi_device *device, u32 event)
	72	{
	73	struct tps_key_entry *key;
	74	static bool dup_evnt[2];
	75	bool *dup;
	76	struct topstar_hkey *hkey = acpi_driver_data(device);
	77
	78	/* 0x83 and 0x84 key events comes duplicated... */
	79	if (event == 0x83 \|\| event == 0x84) {
	80	dup = &dup_evnt[event - 0x83];
	81	if (*dup) {
	82	*dup = false;
	83	return;
	84	}
	85	*dup = true;
	86	}
	87
	88	/*
	89	* 'G key' generate two event codes, convert to only
	90	* one event/key code for now (3G switch?)
	91	*/
	92	if (event == 0x97)
	93	event = 0x96;
	94
	95	key = tps_get_key_by_scancode(event);
	96	if (key) {
	97	input_report_key(hkey->inputdev, key->keycode, 1);
	98	input_sync(hkey->inputdev);
	99	input_report_key(hkey->inputdev, key->keycode, 0);
	100	input_sync(hkey->inputdev);
	101	return;
	102	}
	103
	104	/* Known non hotkey events don't handled or that we don't care yet */
	105	if (event == 0x8e \|\| event == 0x8f \|\| event == 0x90)
	106	return;
	107
	108	pr_info("unknown event = 0x%02x\n", event);
	109	}
	110
	111	static int acpi_topstar_fncx_switch(struct acpi_device *device, bool state)
	112	{
	113	acpi_status status;
	114	union acpi_object fncx_params[1] = {
	115	{ .type = ACPI_TYPE_INTEGER }
	116	};
	117	struct acpi_object_list fncx_arg_list = { 1, &fncx_params[0] };
	118
	119	fncx_params[0].integer.value = state ? 0x86 : 0x87;
	120	status = acpi_evaluate_object(device->handle, "FNCX", &fncx_arg_list, NULL);
	121	if (ACPI_FAILURE(status)) {
	122	pr_err("Unable to switch FNCX notifications\n");
	123	return -ENODEV;
	124	}
125
126	return 0;
127	}
128
58b93995 DT	129	static int topstar_getkeycode(struct input_dev *dev,
58b93995 DT	130	unsigned int scancode, unsigned int *keycode)
9caeb532 HRK	131	{
	132	struct tps_key_entry *key = tps_get_key_by_scancode(scancode);
	133
	134	if (!key)
	135	return -EINVAL;
	136
	137	*keycode = key->keycode;
	138	return 0;
	139	}
	140
58b93995 DT	141	static int topstar_setkeycode(struct input_dev *dev,
58b93995 DT	142	unsigned int scancode, unsigned int keycode)
9caeb532 HRK	143	{
	144	struct tps_key_entry *key;
	145	int old_keycode;
	146
9caeb532 HRK	147	key = tps_get_key_by_scancode(scancode);
	148
	149	if (!key)
	150	return -EINVAL;
	151
	152	old_keycode = key->keycode;
	153	key->keycode = keycode;
	154	set_bit(keycode, dev->keybit);
	155	if (!tps_get_key_by_keycode(old_keycode))
	156	clear_bit(old_keycode, dev->keybit);
	157	return 0;
	158	}
	159
	160	static int acpi_topstar_init_hkey(struct topstar_hkey *hkey)
	161	{
	162	struct tps_key_entry *key;
	163
	164	hkey->inputdev = input_allocate_device();
	165	if (!hkey->inputdev) {
	166	pr_err("Unable to allocate input device\n");
	167	return -ENODEV;
	168	}
	169	hkey->inputdev->name = "Topstar Laptop extra buttons";
	170	hkey->inputdev->phys = "topstar/input0";
	171	hkey->inputdev->id.bustype = BUS_HOST;
	172	hkey->inputdev->getkeycode = topstar_getkeycode;
	173	hkey->inputdev->setkeycode = topstar_setkeycode;
	174	for (key = topstar_keymap; key->code; key++) {
	175	set_bit(EV_KEY, hkey->inputdev->evbit);
	176	set_bit(key->keycode, hkey->inputdev->keybit);
	177	}
	178	if (input_register_device(hkey->inputdev)) {
	179	pr_err("Unable to register input device\n");
	180	input_free_device(hkey->inputdev);
	181	return -ENODEV;
	182	}
	183
	184	return 0;
	185	}
	186
	187	static int acpi_topstar_add(struct acpi_device *device)
	188	{
	189	struct topstar_hkey *tps_hkey;
	190
	191	tps_hkey = kzalloc(sizeof(struct topstar_hkey), GFP_KERNEL);
	192	if (!tps_hkey)
	193	return -ENOMEM;
	194
	195	strcpy(acpi_device_name(device), "Topstar TPSACPI");
	196	strcpy(acpi_device_class(device), ACPI_TOPSTAR_CLASS);
	197
	198	if (acpi_topstar_fncx_switch(device, true))
	199	goto add_err;
	200
	201	if (acpi_topstar_init_hkey(tps_hkey))
	202	goto add_err;
	203
	204	device->driver_data = tps_hkey;
	205	return 0;
	206
	207	add_err:
	208	kfree(tps_hkey);
	209	return -ENODEV;
	210	}
211
212	static int acpi_topstar_remove(struct acpi_device *device, int type)
213	{
214	struct topstar_hkey *tps_hkey = acpi_driver_data(device);
215
216	acpi_topstar_fncx_switch(device, false);
217
218	input_unregister_device(tps_hkey->inputdev);
219	kfree(tps_hkey);
220
221	return 0;
222	}
223
224	static const struct acpi_device_id topstar_device_ids[] = {
225	{ "TPSACPI01", 0 },
226	{ "", 0 },
227	};
228	MODULE_DEVICE_TABLE(acpi, topstar_device_ids);
229
230	static struct acpi_driver acpi_topstar_driver = {
231	.name = "Topstar laptop ACPI driver",
232	.class = ACPI_TOPSTAR_CLASS,
233	.ids = topstar_device_ids,
234	.ops = {
235	.add = acpi_topstar_add,
236	.remove = acpi_topstar_remove,
237	.notify = acpi_topstar_notify,
238	},
239	};
240
241	static int __init topstar_laptop_init(void)
242	{
243	int ret;
244
245	ret = acpi_bus_register_driver(&acpi_topstar_driver);
246	if (ret < 0)
247	return ret;
248
249	printk(KERN_INFO "Topstar Laptop ACPI extras driver loaded\n");
250
251	return 0;
252	}
253
254	static void __exit topstar_laptop_exit(void)
255	{
256	acpi_bus_unregister_driver(&acpi_topstar_driver);
257	}
258
259	module_init(topstar_laptop_init);
260	module_exit(topstar_laptop_exit);
261
262	MODULE_AUTHOR("Herton Ronaldo Krzesinski");
263	MODULE_DESCRIPTION("Topstar Laptop ACPI Extras driver");
264	MODULE_LICENSE("GPL");