diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /Documentation/video4linux/README.ir |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'Documentation/video4linux/README.ir')
-rw-r--r-- | Documentation/video4linux/README.ir | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/Documentation/video4linux/README.ir b/Documentation/video4linux/README.ir new file mode 100644 index 000000000000..0da47a847056 --- /dev/null +++ b/Documentation/video4linux/README.ir | |||
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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> | ||