firedtv-rc.c

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/*
 * FireDTV driver (formerly known as FireSAT)
 *
 * Copyright (C) 2004 Andreas Monitzer <[email protected]>
 *
 *  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/bitops.h>
#include <linux/input.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/types.h>
#include <linux/workqueue.h>

#include "firedtv.h"

/* fixed table with older keycodes, geared towards MythTV */
static const u16 oldtable[] = {

    /* code from device: 0x4501...0x451f */

    KEY_ESC,
    KEY_F9,
    KEY_1,
    KEY_2,
    KEY_3,
    KEY_4,
    KEY_5,
    KEY_6,
    KEY_7,
    KEY_8,
    KEY_9,
    KEY_I,
    KEY_0,
    KEY_ENTER,
    KEY_RED,
    KEY_UP,
    KEY_GREEN,
    KEY_F10,
    KEY_SPACE,
    KEY_F11,
    KEY_YELLOW,
    KEY_DOWN,
    KEY_BLUE,
    KEY_Z,
    KEY_P,
    KEY_PAGEDOWN,
    KEY_LEFT,
    KEY_W,
    KEY_RIGHT,
    KEY_P,
    KEY_M,

    /* code from device: 0x4540...0x4542 */

    KEY_R,
    KEY_V,
    KEY_C,
};

/* user-modifiable table for a remote as sold in 2008 */
static const u16 keytable[] = {

    /* code from device: 0x0300...0x031f */

    [0x00] = KEY_POWER,
    [0x01] = KEY_SLEEP,
    [0x02] = KEY_STOP,
    [0x03] = KEY_OK,
    [0x04] = KEY_RIGHT,
    [0x05] = KEY_1,
    [0x06] = KEY_2,
    [0x07] = KEY_3,
    [0x08] = KEY_LEFT,
    [0x09] = KEY_4,
    [0x0a] = KEY_5,
    [0x0b] = KEY_6,
    [0x0c] = KEY_UP,
    [0x0d] = KEY_7,
    [0x0e] = KEY_8,
    [0x0f] = KEY_9,
    [0x10] = KEY_DOWN,
    [0x11] = KEY_TITLE, /* "OSD" - fixme */
    [0x12] = KEY_0,
    [0x13] = KEY_F20,   /* "16:9" - fixme */
    [0x14] = KEY_SCREEN,    /* "FULL" - fixme */
    [0x15] = KEY_MUTE,
    [0x16] = KEY_SUBTITLE,
    [0x17] = KEY_RECORD,
    [0x18] = KEY_TEXT,
    [0x19] = KEY_AUDIO,
    [0x1a] = KEY_RED,
    [0x1b] = KEY_PREVIOUS,
    [0x1c] = KEY_REWIND,
    [0x1d] = KEY_PLAYPAUSE,
    [0x1e] = KEY_NEXT,
    [0x1f] = KEY_VOLUMEUP,

    /* code from device: 0x0340...0x0354 */

    [0x20] = KEY_CHANNELUP,
    [0x21] = KEY_F21,   /* "4:3" - fixme */
    [0x22] = KEY_TV,
    [0x23] = KEY_DVD,
    [0x24] = KEY_VCR,
    [0x25] = KEY_AUX,
    [0x26] = KEY_GREEN,
    [0x27] = KEY_YELLOW,
    [0x28] = KEY_BLUE,
    [0x29] = KEY_CHANNEL,   /* "CH.LIST" */
    [0x2a] = KEY_VENDOR,    /* "CI" - fixme */
    [0x2b] = KEY_VOLUMEDOWN,
    [0x2c] = KEY_CHANNELDOWN,
    [0x2d] = KEY_LAST,
    [0x2e] = KEY_INFO,
    [0x2f] = KEY_FORWARD,
    [0x30] = KEY_LIST,
    [0x31] = KEY_FAVORITES,
    [0x32] = KEY_MENU,
    [0x33] = KEY_EPG,
    [0x34] = KEY_EXIT,
};

int fdtv_register_rc(struct firedtv *fdtv, struct device *dev)
{
    struct input_dev *idev;
    int i, err;

    idev = input_allocate_device();
    if (!idev)
        return -ENOMEM;

    fdtv->remote_ctrl_dev = idev;
    idev->name = "FireDTV remote control";
    idev->dev.parent = dev;
    idev->evbit[0] = BIT_MASK(EV_KEY);
    idev->keycode = kmemdup(keytable, sizeof(keytable), GFP_KERNEL);
    if (!idev->keycode) {
        err = -ENOMEM;
        goto fail;
    }
    idev->keycodesize = sizeof(keytable[0]);
    idev->keycodemax = ARRAY_SIZE(keytable);

    for (i = 0; i < ARRAY_SIZE(keytable); i++)
        set_bit(keytable[i], idev->keybit);

    err = input_register_device(idev);
    if (err)
        goto fail_free_keymap;

    return 0;

fail_free_keymap:
    kfree(idev->keycode);
fail:
    input_free_device(idev);
    return err;
}

void fdtv_unregister_rc(struct firedtv *fdtv)
{
    cancel_work_sync(&fdtv->remote_ctrl_work);
    kfree(fdtv->remote_ctrl_dev->keycode);
    input_unregister_device(fdtv->remote_ctrl_dev);
}

void fdtv_handle_rc(struct firedtv *fdtv, unsigned int code)
{
    struct input_dev *idev = fdtv->remote_ctrl_dev;
    u16 *keycode = idev->keycode;

    if (code >= 0x0300 && code <= 0x031f)
        code = keycode[code - 0x0300];
    else if (code >= 0x0340 && code <= 0x0354)
        code = keycode[code - 0x0320];
    else if (code >= 0x4501 && code <= 0x451f)
        code = oldtable[code - 0x4501];
    else if (code >= 0x4540 && code <= 0x4542)
        code = oldtable[code - 0x4521];
    else {
        printk(KERN_DEBUG "firedtv: invalid key code 0x%04x "
               "from remote control\n", code);
        return;
    }

    input_report_key(idev, code, 1);
    input_sync(idev);
    input_report_key(idev, code, 0);
    input_sync(idev);
}