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- 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>
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