Based on kernel version 4.7.2. Page generated on 2016-08-22 22:48 EST.
1 2 infrared remote control support in video4linux drivers 3 ====================================================== 4 5 6 basics 7 ------ 8 9 Current versions use the linux input layer to support infrared 10 remote controls. I suggest to download my input layer tools 11 from http://bytesex.org/snapshot/input-<date>.tar.gz 12 13 Modules you have to load: 14 15 saa7134 statically built in, i.e. just the driver :) 16 bttv ir-kbd-gpio or ir-kbd-i2c depending on your 17 card. 18 19 ir-kbd-gpio and ir-kbd-i2c don't support all cards lirc supports 20 (yet), mainly for the reason that the code of lirc_i2c and lirc_gpio 21 was very confusing and I decided to basically start over from scratch. 22 Feel free to contact me in case of trouble. Note that the ir-kbd-* 23 modules work on 2.6.x kernels only through ... 24 25 26 how it works 27 ------------ 28 29 The modules register the remote as keyboard within the linux input 30 layer, i.e. you'll see the keys of the remote as normal key strokes 31 (if CONFIG_INPUT_KEYBOARD is enabled). 32 33 Using the event devices (CONFIG_INPUT_EVDEV) it is possible for 34 applications to access the remote via /dev/input/event<n> devices. 35 You might have to create the special files using "/sbin/MAKEDEV 36 input". The input layer tools mentioned above use the event device. 37 38 The input layer tools are nice for trouble shooting, i.e. to check 39 whenever the input device is really present, which of the devices it 40 is, check whenever pressing keys on the remote actually generates 41 events and the like. You can also use the kbd utility to change the 42 keymaps (2.6.x kernels only through). 43 44 45 using with lircd 46 ================ 47 48 The cvs version of the lircd daemon supports reading events from the 49 linux input layer (via event device). The input layer tools tarball 50 comes with a lircd config file. 51 52 53 using without lircd 54 =================== 55 56 XFree86 likely can be configured to recognise the remote keys. Once I 57 simply tried to configure one of the multimedia keyboards as input 58 device, which had the effect that XFree86 recognised some of the keys 59 of my remote control and passed volume up/down key presses as 60 XF86AudioRaiseVolume and XF86AudioLowerVolume key events to the X11 61 clients. 62 63 It likely is possible to make that fly with a nice xkb config file, 64 I know next to nothing about that through. 65 66 67 Have fun, 68 69 Gerd 70 71 -- 72 Gerd Knorr <kraxel@bytesex.org>