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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/drivers/hid/hid-gyration.c
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// SPDX-License-Identifier: GPL-2.0-or-later

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/*

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 *  HID driver for some gyration "special" devices

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 *

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 *  Copyright (c) 1999 Andreas Gal

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 *  Copyright (c) 2000-2005 Vojtech Pavlik <[email protected]>

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 *  Copyright (c) 2005 Michael Haboustak <[email protected]> for Concept2, Inc

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 *  Copyright (c) 2008 Jiri Slaby

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 *  Copyright (c) 2006-2008 Jiri Kosina

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 */

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/*

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 */

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#include <linux/device.h>

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#include <linux/input.h>

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#include <linux/hid.h>

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#include <linux/module.h>

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#include "hid-ids.h"

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#define gy_map_key_clear(c)	hid_map_usage_clear(hi, usage, bit, max, \

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					EV_KEY, (c))

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static int gyration_input_mapping(struct hid_device *hdev, struct hid_input *hi,

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		struct hid_field *field, struct hid_usage *usage,

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		unsigned long **bit, int *max)

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{

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	if ((usage->hid & HID_USAGE_PAGE) != HID_UP_LOGIVENDOR)

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		return 0;

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	set_bit(EV_REP, hi->input->evbit);

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	switch (usage->hid & HID_USAGE) {

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	/* Reported on Gyration MCE Remote */

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	case 0x00d: gy_map_key_clear(KEY_HOME);		break;

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	case 0x024: gy_map_key_clear(KEY_DVD);		break;

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	case 0x025: gy_map_key_clear(KEY_PVR);		break;

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	case 0x046: gy_map_key_clear(KEY_MEDIA);	break;

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	case 0x047: gy_map_key_clear(KEY_MP3);		break;

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	case 0x048: gy_map_key_clear(KEY_MEDIA);	break;

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	case 0x049: gy_map_key_clear(KEY_CAMERA);	break;

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	case 0x04a: gy_map_key_clear(KEY_VIDEO);	break;

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	case 0x05a: gy_map_key_clear(KEY_TEXT);		break;

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	case 0x05b: gy_map_key_clear(KEY_RED);		break;

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	case 0x05c: gy_map_key_clear(KEY_GREEN);	break;

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	case 0x05d: gy_map_key_clear(KEY_YELLOW);	break;

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	case 0x05e: gy_map_key_clear(KEY_BLUE);		break;

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	default:

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		return 0;

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	}

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	return 1;

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}

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static int gyration_event(struct hid_device *hdev, struct hid_field *field,

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		struct hid_usage *usage, __s32 value)

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{

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	if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput)

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		return 0;

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	if ((usage->hid & HID_USAGE_PAGE) == HID_UP_GENDESK &&

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			(usage->hid & 0xff) == 0x82) {

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		struct input_dev *input = field->hidinput->input;

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		input_event(input, usage->type, usage->code, 1);

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		input_sync(input);

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		input_event(input, usage->type, usage->code, 0);

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		input_sync(input);

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		return 1;

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	}

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	return 0;

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}

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static const struct hid_device_id gyration_devices[] = {

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	{ HID_USB_DEVICE(USB_VENDOR_ID_GYRATION, USB_DEVICE_ID_GYRATION_REMOTE) },

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	{ HID_USB_DEVICE(USB_VENDOR_ID_GYRATION, USB_DEVICE_ID_GYRATION_REMOTE_2) },

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	{ HID_USB_DEVICE(USB_VENDOR_ID_GYRATION, USB_DEVICE_ID_GYRATION_REMOTE_3) },

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	{ }

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};

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MODULE_DEVICE_TABLE(hid, gyration_devices);

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static struct hid_driver gyration_driver = {

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	.name = "gyration",

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	.id_table = gyration_devices,

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	.input_mapping = gyration_input_mapping,

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	.event = gyration_event,

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};

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module_hid_driver(gyration_driver);

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MODULE_DESCRIPTION("HID driver for some gyration \"special\" devices");

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MODULE_LICENSE("GPL");

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