mirror of https://gitee.com/openkylin/linux.git
73 lines
2.3 KiB
Plaintext
73 lines
2.3 KiB
Plaintext
|
|
||
|
|
infrared remote control support in video4linux drivers
|
||
|
|
======================================================
|
||
|
|
|
||
|
|
|
||
|
|
basics
|
||
|
|
------
|
||
|
|
|
||
|
|
Current versions use the linux input layer to support infrared
|
||
|
|
remote controls. I suggest to download my input layer tools
|
||
|
|
from http://bytesex.org/snapshot/input-<date>.tar.gz
|
||
|
|
|
||
|
|
Modules you have to load:
|
||
|
|
|
||
|
|
saa7134 statically built in, i.e. just the driver :)
|
||
|
|
bttv ir-kbd-gpio or ir-kbd-i2c depending on your
|
||
|
|
card.
|
||
|
|
|
||
|
|
ir-kbd-gpio and ir-kbd-i2c don't support all cards lirc supports
|
||
|
|
(yet), mainly for the reason that the code of lirc_i2c and lirc_gpio
|
||
|
|
was very confusing and I decided to basically start over from scratch.
|
||
|
|
Feel free to contact me in case of trouble. Note that the ir-kbd-*
|
||
|
|
modules work on 2.6.x kernels only through ...
|
||
|
|
|
||
|
|
|
||
|
|
how it works
|
||
|
|
------------
|
||
|
|
|
||
|
|
The modules register the remote as keyboard within the linux input
|
||
|
|
layer, i.e. you'll see the keys of the remote as normal key strokes
|
||
|
|
(if CONFIG_INPUT_KEYBOARD is enabled).
|
||
|
|
|
||
|
|
Using the event devices (CONFIG_INPUT_EVDEV) it is possible for
|
||
|
|
applications to access the remote via /dev/input/event<n> devices.
|
||
|
|
You might have to create the special files using "/sbin/MAKEDEV
|
||
|
|
input". The input layer tools mentioned above use the event device.
|
||
|
|
|
||
|
|
The input layer tools are nice for trouble shooting, i.e. to check
|
||
|
|
whenever the input device is really present, which of the devices it
|
||
|
|
is, check whenever pressing keys on the remote actually generates
|
||
|
|
events and the like. You can also use the kbd utility to change the
|
||
|
|
keymaps (2.6.x kernels only through).
|
||
|
|
|
||
|
|
|
||
|
|
using with lircd
|
||
|
|
================
|
||
|
|
|
||
|
|
The cvs version of the lircd daemon supports reading events from the
|
||
|
|
linux input layer (via event device). The input layer tools tarball
|
||
|
|
comes with a lircd config file.
|
||
|
|
|
||
|
|
|
||
|
|
using without lircd
|
||
|
|
===================
|
||
|
|
|
||
|
|
XFree86 likely can be configured to recognise the remote keys. Once I
|
||
|
|
simply tried to configure one of the multimedia keyboards as input
|
||
|
|
device, which had the effect that XFree86 recognised some of the keys
|
||
|
|
of my remote control and passed volume up/down key presses as
|
||
|
|
XF86AudioRaiseVolume and XF86AudioLowerVolume key events to the X11
|
||
|
|
clients.
|
||
|
|
|
||
|
|
It likely is possible to make that fly with a nice xkb config file,
|
||
|
|
I know next to nothing about that through.
|
||
|
|
|
||
|
|
|
||
|
|
Have fun,
|
||
|
|
|
||
|
|
Gerd
|
||
|
|
|
||
|
|
--
|
||
|
|
Gerd Knorr <kraxel@bytesex.org>
|