drivers/media/firewire/firedtv-rc.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * FireDTV driver (formerly known as FireSAT)
   4  *
   5  * Copyright (C) 2004 Andreas Monitzer <andy@monitzer.com>
   6  */
   7
   8 #include <linux/bitops.h>
   9 #include <linux/input.h>
  10 #include <linux/kernel.h>
  11 #include <linux/slab.h>
  12 #include <linux/string.h>
  13 #include <linux/types.h>
  14 #include <linux/workqueue.h>
  15
  16 #include "firedtv.h"
  17
  18 /* fixed table with older keycodes, geared towards MythTV */
  19 static const u16 oldtable[] = {
  20
  21         /* code from device: 0x4501...0x451f */
  22
  23         KEY_ESC,
  24         KEY_F9,
  25         KEY_1,
  26         KEY_2,
  27         KEY_3,
  28         KEY_4,
  29         KEY_5,
  30         KEY_6,
  31         KEY_7,
  32         KEY_8,
  33         KEY_9,
  34         KEY_I,
  35         KEY_0,
  36         KEY_ENTER,
  37         KEY_RED,
  38         KEY_UP,
  39         KEY_GREEN,
  40         KEY_F10,
  41         KEY_SPACE,
  42         KEY_F11,
  43         KEY_YELLOW,
  44         KEY_DOWN,
  45         KEY_BLUE,
  46         KEY_Z,
  47         KEY_P,
  48         KEY_PAGEDOWN,
  49         KEY_LEFT,
  50         KEY_W,
  51         KEY_RIGHT,
  52         KEY_P,
  53         KEY_M,
  54
  55         /* code from device: 0x4540...0x4542 */
  56
  57         KEY_R,
  58         KEY_V,
  59         KEY_C,
  60 };
  61
  62 /* user-modifiable table for a remote as sold in 2008 */
  63 static const u16 keytable[] = {
  64
  65         /* code from device: 0x0300...0x031f */
  66
  67         [0x00] = KEY_POWER,
  68         [0x01] = KEY_SLEEP,
  69         [0x02] = KEY_STOP,
  70         [0x03] = KEY_OK,
  71         [0x04] = KEY_RIGHT,
  72         [0x05] = KEY_1,
  73         [0x06] = KEY_2,
  74         [0x07] = KEY_3,
  75         [0x08] = KEY_LEFT,
  76         [0x09] = KEY_4,
  77         [0x0a] = KEY_5,
  78         [0x0b] = KEY_6,
  79         [0x0c] = KEY_UP,
  80         [0x0d] = KEY_7,
  81         [0x0e] = KEY_8,
  82         [0x0f] = KEY_9,
  83         [0x10] = KEY_DOWN,
  84         [0x11] = KEY_TITLE,     /* "OSD" - fixme */
  85         [0x12] = KEY_0,
  86         [0x13] = KEY_F20,       /* "16:9" - fixme */
  87         [0x14] = KEY_SCREEN,    /* "FULL" - fixme */
  88         [0x15] = KEY_MUTE,
  89         [0x16] = KEY_SUBTITLE,
  90         [0x17] = KEY_RECORD,
  91         [0x18] = KEY_TEXT,
  92         [0x19] = KEY_AUDIO,
  93         [0x1a] = KEY_RED,
  94         [0x1b] = KEY_PREVIOUS,
  95         [0x1c] = KEY_REWIND,
  96         [0x1d] = KEY_PLAYPAUSE,
  97         [0x1e] = KEY_NEXT,
  98         [0x1f] = KEY_VOLUMEUP,
  99
 100         /* code from device: 0x0340...0x0354 */
 101
 102         [0x20] = KEY_CHANNELUP,
 103         [0x21] = KEY_F21,       /* "4:3" - fixme */
 104         [0x22] = KEY_TV,
 105         [0x23] = KEY_DVD,
 106         [0x24] = KEY_VCR,
 107         [0x25] = KEY_AUX,
 108         [0x26] = KEY_GREEN,
 109         [0x27] = KEY_YELLOW,
 110         [0x28] = KEY_BLUE,
 111         [0x29] = KEY_CHANNEL,   /* "CH.LIST" */
 112         [0x2a] = KEY_VENDOR,    /* "CI" - fixme */
 113         [0x2b] = KEY_VOLUMEDOWN,
 114         [0x2c] = KEY_CHANNELDOWN,
 115         [0x2d] = KEY_LAST,
 116         [0x2e] = KEY_INFO,
 117         [0x2f] = KEY_FORWARD,
 118         [0x30] = KEY_LIST,
 119         [0x31] = KEY_FAVORITES,
 120         [0x32] = KEY_MENU,
 121         [0x33] = KEY_EPG,
 122         [0x34] = KEY_EXIT,
 123 };
 124
 125 int fdtv_register_rc(struct firedtv *fdtv, struct device *dev)
 126 {
 127         struct input_dev *idev;
 128         int i, err;
 129
 130         idev = input_allocate_device();
 131         if (!idev)
 132                 return -ENOMEM;
 133
 134         fdtv->remote_ctrl_dev = idev;
 135         idev->name = "FireDTV remote control";
 136         idev->dev.parent = dev;
 137         idev->evbit[0] = BIT_MASK(EV_KEY);
 138         idev->keycode = kmemdup(keytable, sizeof(keytable), GFP_KERNEL);
 139         if (!idev->keycode) {
 140                 err = -ENOMEM;
 141                 goto fail;
 142         }
 143         idev->keycodesize = sizeof(keytable[0]);
 144         idev->keycodemax = ARRAY_SIZE(keytable);
 145
 146         for (i = 0; i < ARRAY_SIZE(keytable); i++)
 147                 set_bit(keytable[i], idev->keybit);
 148
 149         err = input_register_device(idev);
 150         if (err)
 151                 goto fail_free_keymap;
 152
 153         return 0;
 154
 155 fail_free_keymap:
 156         kfree(idev->keycode);
 157 fail:
 158         input_free_device(idev);
 159         return err;
 160 }
 161
 162 void fdtv_unregister_rc(struct firedtv *fdtv)
 163 {
 164         cancel_work_sync(&fdtv->remote_ctrl_work);
 165         kfree(fdtv->remote_ctrl_dev->keycode);
 166         input_unregister_device(fdtv->remote_ctrl_dev);
 167 }
 168
 169 void fdtv_handle_rc(struct firedtv *fdtv, unsigned int code)
 170 {
 171         struct input_dev *idev = fdtv->remote_ctrl_dev;
 172         u16 *keycode = idev->keycode;
 173
 174         if (code >= 0x0300 && code <= 0x031f)
 175                 code = keycode[code - 0x0300];
 176         else if (code >= 0x0340 && code <= 0x0354)
 177                 code = keycode[code - 0x0320];
 178         else if (code >= 0x4501 && code <= 0x451f)
 179                 code = oldtable[code - 0x4501];
 180         else if (code >= 0x4540 && code <= 0x4542)
 181                 code = oldtable[code - 0x4521];
 182         else {
 183                 dev_dbg(fdtv->device,
 184                         "invalid key code 0x%04x from remote control\n",
 185                         code);
 186                 return;
 187         }
 188
 189         input_report_key(idev, code, 1);
 190         input_sync(idev);
 191         input_report_key(idev, code, 0);
 192         input_sync(idev);
 193 }