[linux-block.git] / drivers / hid / hid-a4tech.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *  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
 */

/*
 */

#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_HI_RES) {
		set_bit(REL_HWHEEL, *bit);
		set_bit(REL_HWHEEL_HI_RES, *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_HI_RES) {
			a4->delayed_value = value;
			return 1;
		}

		if (usage->hid == 0x000100b8) {
			input_event(input, EV_REL, value ? REL_HWHEEL :
					REL_WHEEL, a4->delayed_value);
			input_event(input, EV_REL, value ? REL_HWHEEL_HI_RES :
					REL_WHEEL_HI_RES, a4->delayed_value * 120);
			return 1;
		}
	}

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

	if (usage->code == REL_WHEEL_HI_RES && a4->hw_wheel) {
		input_event(input, usage->type, REL_HWHEEL, value);
		input_event(input, usage->type, REL_HWHEEL_HI_RES, value * 120);
		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 = devm_kzalloc(&hdev->dev, sizeof(*a4), GFP_KERNEL);
	if (a4 == NULL) {
		hid_err(hdev, "can't alloc device descriptor\n");
		return -ENOMEM;
	}

	a4->quirks = id->driver_data;

	hid_set_drvdata(hdev, a4);

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

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

	return 0;
}

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,
};
module_hid_driver(a4_driver);

MODULE_LICENSE("GPL");
Commit	Line	Data
2874c5fd	1	// SPDX-License-Identifier: GPL-2.0-or-later
14a21cd4 JS	2	/*
	3	* HID driver for some a4tech "special" devices
	4	*
	5	* Copyright (c) 1999 Andreas Gal
	6	* Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
	7	* Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
	8	* Copyright (c) 2006-2007 Jiri Kosina
14a21cd4 JS	9	* Copyright (c) 2008 Jiri Slaby
	10	*/
	11
	12	/*
14a21cd4 JS	13	*/
	14
	15	#include <linux/device.h>
	16	#include <linux/input.h>
	17	#include <linux/hid.h>
	18	#include <linux/module.h>
5a0e3ad6	19	#include <linux/slab.h>
14a21cd4 JS	20
	21	#include "hid-ids.h"
	22
	23	#define A4_2WHEEL_MOUSE_HACK_7 0x01
	24	#define A4_2WHEEL_MOUSE_HACK_B8 0x02
	25
	26	struct a4tech_sc {
	27	unsigned long quirks;
	28	unsigned int hw_wheel;
	29	__s32 delayed_value;
	30	};
	31
	32	static int a4_input_mapped(struct hid_device hdev, struct hid_input hi,
	33	struct hid_field field, struct hid_usage usage,
	34	unsigned long *bit, int max)
	35	{
	36	struct a4tech_sc *a4 = hid_get_drvdata(hdev);
	37
abf82e8f	38	if (usage->type == EV_REL && usage->code == REL_WHEEL_HI_RES) {
14a21cd4	39	set_bit(REL_HWHEEL, *bit);
abf82e8f BS	40	set_bit(REL_HWHEEL_HI_RES, *bit);
abf82e8f BS	41	}
14a21cd4 JS	42
	43	if ((a4->quirks & A4_2WHEEL_MOUSE_HACK_7) && usage->hid == 0x00090007)
	44	return -1;
	45
	46	return 0;
	47	}
	48
	49	static int a4_event(struct hid_device hdev, struct hid_field field,
	50	struct hid_usage *usage, __s32 value)
	51	{
	52	struct a4tech_sc *a4 = hid_get_drvdata(hdev);
	53	struct input_dev *input;
	54
	55	if (!(hdev->claimed & HID_CLAIMED_INPUT) \|\| !field->hidinput \|\|
	56	!usage->type)
	57	return 0;
	58
	59	input = field->hidinput->input;
	60
	61	if (a4->quirks & A4_2WHEEL_MOUSE_HACK_B8) {
abf82e8f	62	if (usage->type == EV_REL && usage->code == REL_WHEEL_HI_RES) {
14a21cd4 JS	63	a4->delayed_value = value;
	64	return 1;
	65	}
	66
	67	if (usage->hid == 0x000100b8) {
	68	input_event(input, EV_REL, value ? REL_HWHEEL :
	69	REL_WHEEL, a4->delayed_value);
abf82e8f BS	70	input_event(input, EV_REL, value ? REL_HWHEEL_HI_RES :
abf82e8f BS	71	REL_WHEEL_HI_RES, a4->delayed_value * 120);
14a21cd4 JS	72	return 1;
	73	}
	74	}
	75
	76	if ((a4->quirks & A4_2WHEEL_MOUSE_HACK_7) && usage->hid == 0x00090007) {
	77	a4->hw_wheel = !!value;
	78	return 1;
	79	}
	80
abf82e8f	81	if (usage->code == REL_WHEEL_HI_RES && a4->hw_wheel) {
14a21cd4	82	input_event(input, usage->type, REL_HWHEEL, value);
abf82e8f	83	input_event(input, usage->type, REL_HWHEEL_HI_RES, value * 120);
14a21cd4 JS	84	return 1;
	85	}
	86
	87	return 0;
	88	}
	89
	90	static int a4_probe(struct hid_device hdev, const struct hid_device_id id)
	91	{
	92	struct a4tech_sc *a4;
	93	int ret;
	94
abf832bf	95	a4 = devm_kzalloc(&hdev->dev, sizeof(*a4), GFP_KERNEL);
14a21cd4	96	if (a4 == NULL) {
4291ee30	97	hid_err(hdev, "can't alloc device descriptor\n");
abf832bf	98	return -ENOMEM;
14a21cd4 JS	99	}
	100
	101	a4->quirks = id->driver_data;
	102
	103	hid_set_drvdata(hdev, a4);
	104
	105	ret = hid_parse(hdev);
	106	if (ret) {
4291ee30	107	hid_err(hdev, "parse failed\n");
abf832bf	108	return ret;
14a21cd4 JS	109	}
14a21cd4 JS	110
93c10132	111	ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
14a21cd4	112	if (ret) {
4291ee30	113	hid_err(hdev, "hw start failed\n");
abf832bf	114	return ret;
14a21cd4 JS	115	}
	116
	117	return 0;
14a21cd4 JS	118	}
	119
	120	static const struct hid_device_id a4_devices[] = {
	121	{ HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_WCP32PU),
	122	.driver_data = A4_2WHEEL_MOUSE_HACK_7 },
	123	{ HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_X5_005D),
	124	.driver_data = A4_2WHEEL_MOUSE_HACK_B8 },
b7e1b203 LP	125	{ HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_RP_649),
b7e1b203 LP	126	.driver_data = A4_2WHEEL_MOUSE_HACK_B8 },
14a21cd4 JS	127	{ }
	128	};
	129	MODULE_DEVICE_TABLE(hid, a4_devices);
	130
	131	static struct hid_driver a4_driver = {
	132	.name = "a4tech",
	133	.id_table = a4_devices,
	134	.input_mapped = a4_input_mapped,
	135	.event = a4_event,
	136	.probe = a4_probe,
14a21cd4	137	};
f425458e	138	module_hid_driver(a4_driver);
14a21cd4	139
14a21cd4	140	MODULE_LICENSE("GPL");