drivers/hid/hid-twinhan.c

Source file repositories/reference/linux-study-clean/drivers/hid/hid-twinhan.c

File Facts

System
Linux kernel
Corpus path
drivers/hid/hid-twinhan.c
Extension
.c
Size
4662 bytes
Lines
136
Domain
Driver Families
Bucket
drivers/hid
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0-only
/*
 * HID driver for TwinHan IR remote control
 *
 * Based on hid-gyration.c
 *
 * Copyright (c) 2009 Bruno Prémont <bonbons@linux-vserver.org>
 */

/*
 */

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

#include "hid-ids.h"

/*	Remote control key layout + listing:
 *
 * 	Full Screen                              Power
 *	KEY_SCREEN                          KEY_POWER2
 *
 *	1                     2                      3
 *	KEY_NUMERIC_1   KEY_NUMERIC_2    KEY_NUMERIC_3
 *
 *	4                     5                      6
 *	KEY_NUMERIC_4   KEY_NUMERIC_5    KEY_NUMERIC_6
 *
 *	7                     8                      9
 *	KEY_NUMERIC_7   KEY_NUMERIC_8    KEY_NUMERIC_9
 *
 *	REC                   0               Favorite
 *	KEY_RECORD      KEY_NUMERIC_0    KEY_FAVORITES
 *
 *	Rewind                                 Forward
 *	KEY_REWIND           CH+           KEY_FORWARD
 *	               KEY_CHANNELUP
 *
 *	VOL-                  >                   VOL+
 *	KEY_VOLUMEDOWN    KEY_PLAY        KEY_VOLUMEUP
 *
 *	                     CH-
 *	              KEY_CHANNELDOWN
 *	Recall                                    Stop
 *	KEY_RESTART                           KEY_STOP
 *
 *	Timeshift/Pause     Mute                Cancel
 *	KEY_PAUSE         KEY_MUTE          KEY_CANCEL
 *
 *	Capture            Preview                 EPG
 *	KEY_PRINT        KEY_PROGRAM           KEY_EPG
 *
 *	Record List          Tab              Teletext
 *	KEY_LIST            KEY_TAB           KEY_TEXT
 */

#define th_map_key_clear(c)	hid_map_usage_clear(hi, usage, bit, max, \
					EV_KEY, (c))
static int twinhan_input_mapping(struct hid_device *hdev, struct hid_input *hi,
		struct hid_field *field, struct hid_usage *usage,
		unsigned long **bit, int *max)
{
	if ((usage->hid & HID_USAGE_PAGE) != HID_UP_KEYBOARD)
		return 0;

	switch (usage->hid & HID_USAGE) {
	/* Map all keys from Twinhan Remote */
	case 0x004: th_map_key_clear(KEY_TEXT);         break;
	case 0x006: th_map_key_clear(KEY_RESTART);      break;
	case 0x008: th_map_key_clear(KEY_EPG);          break;
	case 0x00c: th_map_key_clear(KEY_REWIND);       break;
	case 0x00e: th_map_key_clear(KEY_PROGRAM);      break;
	case 0x00f: th_map_key_clear(KEY_LIST);         break;
	case 0x010: th_map_key_clear(KEY_MUTE);         break;
	case 0x011: th_map_key_clear(KEY_FORWARD);      break;
	case 0x013: th_map_key_clear(KEY_PRINT);        break;
	case 0x017: th_map_key_clear(KEY_PAUSE);        break;
	case 0x019: th_map_key_clear(KEY_FAVORITES);    break;
	case 0x01d: th_map_key_clear(KEY_SCREEN);       break;
	case 0x01e: th_map_key_clear(KEY_NUMERIC_1);    break;
	case 0x01f: th_map_key_clear(KEY_NUMERIC_2);    break;
	case 0x020: th_map_key_clear(KEY_NUMERIC_3);    break;
	case 0x021: th_map_key_clear(KEY_NUMERIC_4);    break;
	case 0x022: th_map_key_clear(KEY_NUMERIC_5);    break;
	case 0x023: th_map_key_clear(KEY_NUMERIC_6);    break;
	case 0x024: th_map_key_clear(KEY_NUMERIC_7);    break;
	case 0x025: th_map_key_clear(KEY_NUMERIC_8);    break;
	case 0x026: th_map_key_clear(KEY_NUMERIC_9);    break;

Annotation

Implementation Notes