[linux-2.6-block.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/slab.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>
5a0e3ad6	19	#include <linux/slab.h>
9caeb532 HRK	20	#include <linux/acpi.h>
	21	#include <linux/input.h>
	22
	23	#define ACPI_TOPSTAR_CLASS "topstar"
	24
	25	struct topstar_hkey {
	26	struct input_dev *inputdev;
	27	};
	28
	29	struct tps_key_entry {
	30	u8 code;
	31	u16 keycode;
	32	};
	33
	34	static struct tps_key_entry topstar_keymap[] = {
	35	{ 0x80, KEY_BRIGHTNESSUP },
	36	{ 0x81, KEY_BRIGHTNESSDOWN },
	37	{ 0x83, KEY_VOLUMEUP },
	38	{ 0x84, KEY_VOLUMEDOWN },
	39	{ 0x85, KEY_MUTE },
	40	{ 0x86, KEY_SWITCHVIDEOMODE },
	41	{ 0x87, KEY_F13 }, /* touchpad enable/disable key */
	42	{ 0x88, KEY_WLAN },
	43	{ 0x8a, KEY_WWW },
	44	{ 0x8b, KEY_MAIL },
	45	{ 0x8c, KEY_MEDIA },
	46	{ 0x96, KEY_F14 }, /* G key? */
	47	{ }
	48	};
	49
58b93995	50	static struct tps_key_entry *tps_get_key_by_scancode(unsigned int code)
9caeb532 HRK	51	{
	52	struct tps_key_entry *key;
	53
	54	for (key = topstar_keymap; key->code; key++)
	55	if (code == key->code)
	56	return key;
	57
	58	return NULL;
	59	}
	60
58b93995	61	static struct tps_key_entry *tps_get_key_by_keycode(unsigned int code)
9caeb532 HRK	62	{
	63	struct tps_key_entry *key;
	64
	65	for (key = topstar_keymap; key->code; key++)
	66	if (code == key->keycode)
	67	return key;
	68
	69	return NULL;
	70	}
	71
	72	static void acpi_topstar_notify(struct acpi_device *device, u32 event)
	73	{
	74	struct tps_key_entry *key;
	75	static bool dup_evnt[2];
	76	bool *dup;
	77	struct topstar_hkey *hkey = acpi_driver_data(device);
	78
	79	/* 0x83 and 0x84 key events comes duplicated... */
	80	if (event == 0x83 \|\| event == 0x84) {
	81	dup = &dup_evnt[event - 0x83];
	82	if (*dup) {
	83	*dup = false;
	84	return;
	85	}
	86	*dup = true;
	87	}
	88
	89	/*
	90	* 'G key' generate two event codes, convert to only
	91	* one event/key code for now (3G switch?)
	92	*/
	93	if (event == 0x97)
	94	event = 0x96;
	95
	96	key = tps_get_key_by_scancode(event);
	97	if (key) {
	98	input_report_key(hkey->inputdev, key->keycode, 1);
	99	input_sync(hkey->inputdev);
	100	input_report_key(hkey->inputdev, key->keycode, 0);
	101	input_sync(hkey->inputdev);
	102	return;
	103	}
	104
	105	/* Known non hotkey events don't handled or that we don't care yet */
	106	if (event == 0x8e \|\| event == 0x8f \|\| event == 0x90)
	107	return;
	108
	109	pr_info("unknown event = 0x%02x\n", event);
	110	}
	111
	112	static int acpi_topstar_fncx_switch(struct acpi_device *device, bool state)
	113	{
	114	acpi_status status;
	115	union acpi_object fncx_params[1] = {
	116	{ .type = ACPI_TYPE_INTEGER }
	117	};
	118	struct acpi_object_list fncx_arg_list = { 1, &fncx_params[0] };
	119
	120	fncx_params[0].integer.value = state ? 0x86 : 0x87;
	121	status = acpi_evaluate_object(device->handle, "FNCX", &fncx_arg_list, NULL);
	122	if (ACPI_FAILURE(status)) {
	123	pr_err("Unable to switch FNCX notifications\n");
	124	return -ENODEV;
	125	}
126
127	return 0;
128	}
129
58b93995 DT	130	static int topstar_getkeycode(struct input_dev *dev,
58b93995 DT	131	unsigned int scancode, unsigned int *keycode)
9caeb532 HRK	132	{
	133	struct tps_key_entry *key = tps_get_key_by_scancode(scancode);
	134
	135	if (!key)
	136	return -EINVAL;
	137
	138	*keycode = key->keycode;
	139	return 0;
	140	}
	141
58b93995 DT	142	static int topstar_setkeycode(struct input_dev *dev,
58b93995 DT	143	unsigned int scancode, unsigned int keycode)
9caeb532 HRK	144	{
	145	struct tps_key_entry *key;
	146	int old_keycode;
	147
9caeb532 HRK	148	key = tps_get_key_by_scancode(scancode);
	149
	150	if (!key)
	151	return -EINVAL;
	152
	153	old_keycode = key->keycode;
	154	key->keycode = keycode;
	155	set_bit(keycode, dev->keybit);
	156	if (!tps_get_key_by_keycode(old_keycode))
	157	clear_bit(old_keycode, dev->keybit);
	158	return 0;
	159	}
	160
	161	static int acpi_topstar_init_hkey(struct topstar_hkey *hkey)
	162	{
	163	struct tps_key_entry *key;
	164
	165	hkey->inputdev = input_allocate_device();
	166	if (!hkey->inputdev) {
	167	pr_err("Unable to allocate input device\n");
	168	return -ENODEV;
	169	}
	170	hkey->inputdev->name = "Topstar Laptop extra buttons";
	171	hkey->inputdev->phys = "topstar/input0";
	172	hkey->inputdev->id.bustype = BUS_HOST;
	173	hkey->inputdev->getkeycode = topstar_getkeycode;
	174	hkey->inputdev->setkeycode = topstar_setkeycode;
	175	for (key = topstar_keymap; key->code; key++) {
	176	set_bit(EV_KEY, hkey->inputdev->evbit);
	177	set_bit(key->keycode, hkey->inputdev->keybit);
	178	}
	179	if (input_register_device(hkey->inputdev)) {
	180	pr_err("Unable to register input device\n");
	181	input_free_device(hkey->inputdev);
	182	return -ENODEV;
	183	}
	184
	185	return 0;
	186	}
	187
	188	static int acpi_topstar_add(struct acpi_device *device)
	189	{
	190	struct topstar_hkey *tps_hkey;
	191
	192	tps_hkey = kzalloc(sizeof(struct topstar_hkey), GFP_KERNEL);
	193	if (!tps_hkey)
	194	return -ENOMEM;
	195
	196	strcpy(acpi_device_name(device), "Topstar TPSACPI");
	197	strcpy(acpi_device_class(device), ACPI_TOPSTAR_CLASS);
	198
	199	if (acpi_topstar_fncx_switch(device, true))
	200	goto add_err;
	201
	202	if (acpi_topstar_init_hkey(tps_hkey))
	203	goto add_err;
	204
	205	device->driver_data = tps_hkey;
	206	return 0;
	207
	208	add_err:
	209	kfree(tps_hkey);
	210	return -ENODEV;
	211	}
212
213	static int acpi_topstar_remove(struct acpi_device *device, int type)
214	{
215	struct topstar_hkey *tps_hkey = acpi_driver_data(device);
216
217	acpi_topstar_fncx_switch(device, false);
218
219	input_unregister_device(tps_hkey->inputdev);
220	kfree(tps_hkey);
221
222	return 0;
223	}
224
225	static const struct acpi_device_id topstar_device_ids[] = {
226	{ "TPSACPI01", 0 },
227	{ "", 0 },
228	};
229	MODULE_DEVICE_TABLE(acpi, topstar_device_ids);
230
231	static struct acpi_driver acpi_topstar_driver = {
232	.name = "Topstar laptop ACPI driver",
233	.class = ACPI_TOPSTAR_CLASS,
234	.ids = topstar_device_ids,
235	.ops = {
236	.add = acpi_topstar_add,
237	.remove = acpi_topstar_remove,
238	.notify = acpi_topstar_notify,
239	},
240	};
241
242	static int __init topstar_laptop_init(void)
243	{
244	int ret;
245
246	ret = acpi_bus_register_driver(&acpi_topstar_driver);
247	if (ret < 0)
248	return ret;
249
250	printk(KERN_INFO "Topstar Laptop ACPI extras driver loaded\n");
251
252	return 0;
253	}
254
255	static void __exit topstar_laptop_exit(void)
256	{
257	acpi_bus_unregister_driver(&acpi_topstar_driver);
258	}
259
260	module_init(topstar_laptop_init);
261	module_exit(topstar_laptop_exit);
262
263	MODULE_AUTHOR("Herton Ronaldo Krzesinski");
264	MODULE_DESCRIPTION("Topstar Laptop ACPI Extras driver");
265	MODULE_LICENSE("GPL");