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| author | David Herrmann <dh.herrmann@gmail.com> | 2013-08-26 19:14:46 +0200 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2013-09-04 10:44:16 +0200 |
| commit | 61e00655e9cb82e034eb72b95a51072e718d14a7 (patch) | |
| tree | 614aa5cdce2f2ea90f678e74242d82f5e4740cf4 /include/linux/mod_devicetable.h | |
| parent | a6be8569b6705cbc26e7ae1a8be476067cc5a78b (diff) | |
| download | linux-61e00655e9cb82e034eb72b95a51072e718d14a7.tar.gz linux-61e00655e9cb82e034eb72b95a51072e718d14a7.tar.bz2 linux-61e00655e9cb82e034eb72b95a51072e718d14a7.zip | |
Input: introduce BTN/ABS bits for drums and guitars
There are a bunch of guitar and drums devices out there that all report
similar data. To avoid reporting this as BTN_MISC or ABS_MISC, we
allocate some proper namespace for them. Note that most of these devices
are toys and we cannot report any sophisticated physics via this API.
I did some google-images research and tried to provide definitions that
work with all common devices. That's why I went with 4 toms, 4 cymbals,
one bass, one hi-hat. I haven't seen other drums and I doubt that we need
any additions to that. Anyway, the naming-scheme is intentionally done in
an extensible way.
For guitars, we support 5 frets (normally aligned vertically, compared to
the real horizontal layouts), a single strum-bar with up/down directions,
an optional fret-board and a whammy-bar.
Most of the devices provide pressure values so I went with ABS_* bits. If
we ever support devices which only provide digital input, we have to
decide whether to emulate pressure data or add additional BTN_* bits.
If someone is not familiar with these devices, here are two pictures which
provide almost all introduced interfaces (or try the given keywords
with a google-image search):
Guitar: ("guitar hero world tour guitar")
http://images1.wikia.nocookie.net/__cb20120911023442/applezone/es/images/f/f9/Wii_Guitar.jpg
Drums: ("guitar hero drums")
http://oyster.ignimgs.com/franchises/images/03/55/35526_band-hero-drum-set-hands-on-20090929040735768.jpg
Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'include/linux/mod_devicetable.h')
| -rw-r--r-- | include/linux/mod_devicetable.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/mod_devicetable.h b/include/linux/mod_devicetable.h index b62d4af6c667..65f8a8c4ebbc 100644 --- a/include/linux/mod_devicetable.h +++ b/include/linux/mod_devicetable.h @@ -277,7 +277,7 @@ struct pcmcia_device_id { #define INPUT_DEVICE_ID_KEY_MIN_INTERESTING 0x71 #define INPUT_DEVICE_ID_KEY_MAX 0x2ff #define INPUT_DEVICE_ID_REL_MAX 0x0f -#define INPUT_DEVICE_ID_ABS_MAX 0x3f +#define INPUT_DEVICE_ID_ABS_MAX 0x4f #define INPUT_DEVICE_ID_MSC_MAX 0x07 #define INPUT_DEVICE_ID_LED_MAX 0x0f #define INPUT_DEVICE_ID_SND_MAX 0x07 |