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