[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / hid / hid-a4tech.c

/*
 *  HID driver for some a4tech "special" devices
 *
 *  Copyright (c) 1999 Andreas Gal
 *  Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
 *  Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
 *  Copyright (c) 2006-2007 Jiri Kosina
 *  Copyright (c) 2008 Jiri Slaby
 */

/*
 * 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.
 */

#include <linux/device.h>
#include <linux/input.h>
#include <linux/hid.h>
#include <linux/module.h>
#include <linux/slab.h>

#include "hid-ids.h"

#define A4_2WHEEL_MOUSE_HACK_7	0x01
#define A4_2WHEEL_MOUSE_HACK_B8	0x02

struct a4tech_sc {
	unsigned long quirks;
	unsigned int hw_wheel;
	__s32 delayed_value;
};

static int a4_input_mapped(struct hid_device *hdev, struct hid_input *hi,
		struct hid_field *field, struct hid_usage *usage,
		unsigned long **bit, int *max)
{
	struct a4tech_sc *a4 = hid_get_drvdata(hdev);

	if (usage->type == EV_REL && usage->code == REL_WHEEL)
		set_bit(REL_HWHEEL, *bit);

	if ((a4->quirks & A4_2WHEEL_MOUSE_HACK_7) && usage->hid == 0x00090007)
		return -1;

	return 0;
}

static int a4_event(struct hid_device *hdev, struct hid_field *field,
		struct hid_usage *usage, __s32 value)
{
	struct a4tech_sc *a4 = hid_get_drvdata(hdev);
	struct input_dev *input;

	if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput ||
			!usage->type)
		return 0;

	input = field->hidinput->input;

	if (a4->quirks & A4_2WHEEL_MOUSE_HACK_B8) {
		if (usage->type == EV_REL && usage->code == REL_WHEEL) {
			a4->delayed_value = value;
			return 1;
		}

		if (usage->hid == 0x000100b8) {
			input_event(input, EV_REL, value ? REL_HWHEEL :
					REL_WHEEL, a4->delayed_value);
			return 1;
		}
	}

	if ((a4->quirks & A4_2WHEEL_MOUSE_HACK_7) && usage->hid == 0x00090007) {
		a4->hw_wheel = !!value;
		return 1;
	}

	if (usage->code == REL_WHEEL && a4->hw_wheel) {
		input_event(input, usage->type, REL_HWHEEL, value);
		return 1;
	}

	return 0;
}

static int a4_probe(struct hid_device *hdev, const struct hid_device_id *id)
{
	struct a4tech_sc *a4;
	int ret;

	a4 = kzalloc(sizeof(*a4), GFP_KERNEL);
	if (a4 == NULL) {
		hid_err(hdev, "can't alloc device descriptor\n");
		ret = -ENOMEM;
		goto err_free;
	}

	a4->quirks = id->driver_data;

	hid_set_drvdata(hdev, a4);

	ret = hid_parse(hdev);
	if (ret) {
		hid_err(hdev, "parse failed\n");
		goto err_free;
	}

	ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
	if (ret) {
		hid_err(hdev, "hw start failed\n");
		goto err_free;
	}

	return 0;
err_free:
	kfree(a4);
	return ret;
}

static void a4_remove(struct hid_device *hdev)
{
	struct a4tech_sc *a4 = hid_get_drvdata(hdev);

	hid_hw_stop(hdev);
	kfree(a4);
}

static const struct hid_device_id a4_devices[] = {
	{ HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_WCP32PU),
		.driver_data = A4_2WHEEL_MOUSE_HACK_7 },
	{ HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_X5_005D),
		.driver_data = A4_2WHEEL_MOUSE_HACK_B8 },
	{ HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_RP_649),
		.driver_data = A4_2WHEEL_MOUSE_HACK_B8 },
	{ }
};
MODULE_DEVICE_TABLE(hid, a4_devices);

static struct hid_driver a4_driver = {
	.name = "a4tech",
	.id_table = a4_devices,
	.input_mapped = a4_input_mapped,
	.event = a4_event,
	.probe = a4_probe,
	.remove = a4_remove,
};
module_hid_driver(a4_driver);

MODULE_LICENSE("GPL");
Commit	Line	Data
14a21cd4 JS	1	/*
	2	* HID driver for some a4tech "special" devices
	3	*
	4	* Copyright (c) 1999 Andreas Gal
	5	* Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
	6	* Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
	7	* Copyright (c) 2006-2007 Jiri Kosina
14a21cd4 JS	8	* Copyright (c) 2008 Jiri Slaby
	9	*/
	10
	11	/*
	12	* This program is free software; you can redistribute it and/or modify it
	13	* under the terms of the GNU General Public License as published by the Free
	14	* Software Foundation; either version 2 of the License, or (at your option)
	15	* any later version.
	16	*/
	17
	18	#include <linux/device.h>
	19	#include <linux/input.h>
	20	#include <linux/hid.h>
	21	#include <linux/module.h>
5a0e3ad6	22	#include <linux/slab.h>
14a21cd4 JS	23
	24	#include "hid-ids.h"
	25
	26	#define A4_2WHEEL_MOUSE_HACK_7 0x01
	27	#define A4_2WHEEL_MOUSE_HACK_B8 0x02
	28
	29	struct a4tech_sc {
	30	unsigned long quirks;
	31	unsigned int hw_wheel;
	32	__s32 delayed_value;
	33	};
	34
	35	static int a4_input_mapped(struct hid_device hdev, struct hid_input hi,
	36	struct hid_field field, struct hid_usage usage,
	37	unsigned long *bit, int max)
	38	{
	39	struct a4tech_sc *a4 = hid_get_drvdata(hdev);
	40
	41	if (usage->type == EV_REL && usage->code == REL_WHEEL)
	42	set_bit(REL_HWHEEL, *bit);
	43
	44	if ((a4->quirks & A4_2WHEEL_MOUSE_HACK_7) && usage->hid == 0x00090007)
	45	return -1;
	46
	47	return 0;
	48	}
	49
	50	static int a4_event(struct hid_device hdev, struct hid_field field,
	51	struct hid_usage *usage, __s32 value)
	52	{
	53	struct a4tech_sc *a4 = hid_get_drvdata(hdev);
	54	struct input_dev *input;
	55
	56	if (!(hdev->claimed & HID_CLAIMED_INPUT) \|\| !field->hidinput \|\|
	57	!usage->type)
	58	return 0;
	59
	60	input = field->hidinput->input;
	61
	62	if (a4->quirks & A4_2WHEEL_MOUSE_HACK_B8) {
	63	if (usage->type == EV_REL && usage->code == REL_WHEEL) {
	64	a4->delayed_value = value;
	65	return 1;
	66	}
	67
	68	if (usage->hid == 0x000100b8) {
	69	input_event(input, EV_REL, value ? REL_HWHEEL :
	70	REL_WHEEL, a4->delayed_value);
	71	return 1;
	72	}
	73	}
	74
	75	if ((a4->quirks & A4_2WHEEL_MOUSE_HACK_7) && usage->hid == 0x00090007) {
	76	a4->hw_wheel = !!value;
	77	return 1;
	78	}
	79
	80	if (usage->code == REL_WHEEL && a4->hw_wheel) {
	81	input_event(input, usage->type, REL_HWHEEL, value);
	82	return 1;
	83	}
	84
	85	return 0;
	86	}
87
88	static int a4_probe(struct hid_device hdev, const struct hid_device_id id)
89	{
90	struct a4tech_sc *a4;
91	int ret;
92
93	a4 = kzalloc(sizeof(*a4), GFP_KERNEL);
94	if (a4 == NULL) {
4291ee30	95	hid_err(hdev, "can't alloc device descriptor\n");
14a21cd4 JS	96	ret = -ENOMEM;
	97	goto err_free;
	98	}
	99
	100	a4->quirks = id->driver_data;
	101
	102	hid_set_drvdata(hdev, a4);
	103
	104	ret = hid_parse(hdev);
	105	if (ret) {
4291ee30	106	hid_err(hdev, "parse failed\n");
14a21cd4 JS	107	goto err_free;
	108	}
	109
93c10132	110	ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
14a21cd4	111	if (ret) {
4291ee30	112	hid_err(hdev, "hw start failed\n");
14a21cd4 JS	113	goto err_free;
	114	}
	115
	116	return 0;
	117	err_free:
	118	kfree(a4);
	119	return ret;
	120	}
	121
	122	static void a4_remove(struct hid_device *hdev)
	123	{
	124	struct a4tech_sc *a4 = hid_get_drvdata(hdev);
	125
	126	hid_hw_stop(hdev);
	127	kfree(a4);
	128	}
	129
	130	static const struct hid_device_id a4_devices[] = {
	131	{ HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_WCP32PU),
	132	.driver_data = A4_2WHEEL_MOUSE_HACK_7 },
	133	{ HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_X5_005D),
	134	.driver_data = A4_2WHEEL_MOUSE_HACK_B8 },
b7e1b203 LP	135	{ HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_RP_649),
b7e1b203 LP	136	.driver_data = A4_2WHEEL_MOUSE_HACK_B8 },
14a21cd4 JS	137	{ }
	138	};
	139	MODULE_DEVICE_TABLE(hid, a4_devices);
	140
	141	static struct hid_driver a4_driver = {
	142	.name = "a4tech",
	143	.id_table = a4_devices,
	144	.input_mapped = a4_input_mapped,
	145	.event = a4_event,
	146	.probe = a4_probe,
	147	.remove = a4_remove,
	148	};
f425458e	149	module_hid_driver(a4_driver);
14a21cd4	150
14a21cd4	151	MODULE_LICENSE("GPL");