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Message-Id: <200904131931.24009.dmitry.torokhov@gmail.com>
Date: Mon, 13 Apr 2009 19:31:23 -0700
From: Dmitry Torokhov <dmitry.torokhov@...il.com>
To: Mark Lord <lkml@....ca>, Jiri Kosina <jkosina@...e.cz>
Cc: linux-kernel@...r.kernel.org, linux-input@...r.kernel.org
Subject: Re: Input driver for Twinhan USB 6253:0100 remote control
Hi Mark,
On Wednesday 08 April 2009 10:28:09 Mark Lord wrote:
> Dmitry,
>
> I briefly had access to a Twinhan remote control (for Mythtv et al.)
> and cobbled something together quickly to make it work.
>
> But I really don't understand the new hid/input stuff,
> so this is undoubtedly a total abomination to your eyes. :)
>
Actually HID is Juri's baby so let's see what he says ;). From my POV
we need to update keymap to make it emit proper codes instead of Myth
specific ones, but that is a lesser issue.
> But if somebody could give *exact* and *detailed* instructions as
> to what to do to make it "fit" the new model better, then I may still
> have time (before I have to return it) to clean things up enough.
>
> I don't want to hear about 80-column limits,
> but rather how to properly integrate this into
> the newly refurbished hid stuff.
>
> Have a look. Currently it's just this single source file,
> which has to be loaded before usbhid (not on the quirks list there yet).
>
>
>
> /*
> * HID driver for Twinhan remote control
> *
> * Copyright (c) 2009 Mark Lord
> *
> * 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>
>
> #ifndef HID_USB_DEVICE
> #error "This driver requires a 2.6.28 (or higher) Linux kernel"
> #endif
>
> /* See /usr/include/linux/input.h for all possible KEY_* definitions */
>
> static unsigned int twinhan_keymap (unsigned int key)
> {
> switch (key) {
> case 0x04: key = KEY_RESERVED ; break; // Teletext ()
> case 0x06: key = KEY_ESC ; break; // Recall (myth
> Escape/Cancel/Back) case 0x08: key = KEY_S ; break; // EPG (myth
> guide)
> case 0x0c: key = KEY_HOME ; break; // Rewind (myth commskip back)
> case 0x0e: key = KEY_P ; break; // Preview (myth playback)
> case 0x0f: key = KEY_F3 ; break; // RecordList (myth DVD root
> menu) case 0x10: key = KEY_F9 ; break; // Mute (myth mute ??)
> case 0x11: key = KEY_END ; break; // Forward (myth commskip
> forward) case 0x13: key = KEY_RESERVED ; break; // Capture ()
> case 0x17: key = KEY_P ; break; // Pause (myth Pause)
> case 0x19: key = KEY_M ; break; // Favorite (myth Menu)
> case 0x1d: key = KEY_W ; break; // FullScreen (myth aspect ratio
> zoom) case 0x1e: key = KEY_1 ; break; // 1 (myth 1)
> case 0x1f: key = KEY_2 ; break; // 2 (myth 2)
> case 0x20: key = KEY_3 ; break; // 3 (myth 3)
> case 0x21: key = KEY_4 ; break; // 4 (myth 4)
> case 0x22: key = KEY_5 ; break; // 5 (myth 5)
> case 0x23: key = KEY_6 ; break; // 6 (myth 6)
> case 0x24: key = KEY_7 ; break; // 7 (myth 7)
> case 0x25: key = KEY_8 ; break; // 8 (myth 8)
> case 0x26: key = KEY_9 ; break; // 9 (myth 9)
> case 0x27: key = KEY_0 ; break; // 0 (myth 0)
> case 0x29: key = KEY_ESC ; break; // Cancel (myth
> Escape/Cancel/Back) case 0x28: key = KEY_ENTER ; break; // Play (myth
> Okay/Play) case 0x2b: key = KEY_RESERVED ; break; // Tab ()
> case 0x3f: key = KEY_F2 ; break; // Power (myth function key 2)
> case 0x4a: key = KEY_R ; break; // Record (myth record)
> case 0x4b: key = KEY_UP ; break; // Up/CH+ (myth up)
> case 0x4d: key = KEY_B ; break; // Stop (myth adjust audio sync)
> case 0x4e: key = KEY_DOWN ; break; // Down/CH- (myth down)
> case 0x51: key = KEY_LEFT ; break; // Left/VOL- (myth left)
> case 0x52: key = KEY_RIGHT ; break; // Right/VOL+ (myth right)
> //case 0xe0: // excess code from Power button
> //case 0xe1: // excess code from Power,Left,Right buttons
> //case 0xe2: // excess code from Power button
> //case 0xef: // excess code from Power button
> default: key = KEY_RESERVED ; break; // ignored
> }
> return key;
> }
>
> static int twinhan_event(struct hid_device *hdev, struct hid_field *field,
> struct hid_usage *usage, __s32 value)
> {
> struct input_dev *input = field->hidinput->input;
> static unsigned int last_key = 0;
> unsigned int key;
> int ret = 0;
>
> if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput ||
> !usage->type) return 0;
> if ((usage->hid & HID_USAGE_PAGE) != HID_UP_KEYBOARD)
> return 0;
>
> if (last_key) {
> input_event(input, usage->type, last_key, 0);
> last_key = 0;
> ret = 1;
> }
> if (value) {
> unsigned int val = usage->hid & HID_USAGE;
> key = twinhan_keymap(val);
> if (key) {
> input_event(input, usage->type, key, 1);
> last_key = key;
> }
> ret = 1;
> }
> return ret;
> }
>
> static const struct hid_device_id twinhan_devices[] = {
> { HID_USB_DEVICE(0x6253, 0x0100) },
> { }
> };
> MODULE_DEVICE_TABLE(hid, twinhan_devices);
>
> static struct hid_driver twinhan_driver = {
> .name = "twinhan",
> .id_table = twinhan_devices,
> .event = twinhan_event,
> };
>
> static int twinhan_init(void)
> {
> return hid_register_driver(&twinhan_driver);
> }
>
> static void twinhan_exit(void)
> {
> hid_unregister_driver(&twinhan_driver);
> }
>
> module_init(twinhan_init);
> module_exit(twinhan_exit);
> MODULE_LICENSE("GPL");
> --
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--
Dmitry
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