On Mon, 26 Aug 2013, David Herrmann wrote:
> 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 <[email protected]>
Hi,
I have reviewed and like the implementation of 2/3 and 3/3, but I of
course would like to have Ack from Dmitry for this, so that I could take
it through my tree together with the rest of the patchset.
Dmitry, pretty please?
Thanks.
> ---
> include/linux/mod_devicetable.h | 2 +-
> include/uapi/linux/input.h | 25 +++++++++++++++++++++++--
> 2 files changed, 24 insertions(+), 3 deletions(-)
>
> diff --git a/include/linux/mod_devicetable.h b/include/linux/mod_devicetable.h
> index 45e9214..329aa30 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
> diff --git a/include/uapi/linux/input.h b/include/uapi/linux/input.h
> index d584047..76457ee 100644
> --- a/include/uapi/linux/input.h
> +++ b/include/uapi/linux/input.h
> @@ -716,6 +716,14 @@ struct input_keymap_entry {
> #define BTN_DPAD_LEFT 0x222
> #define BTN_DPAD_RIGHT 0x223
>
> +#define BTN_FRET_FAR_UP 0x224
> +#define BTN_FRET_UP 0x225
> +#define BTN_FRET_MID 0x226
> +#define BTN_FRET_LOW 0x227
> +#define BTN_FRET_FAR_LOW 0x228
> +#define BTN_STRUM_BAR_UP 0x229
> +#define BTN_STRUM_BAR_DOWN 0x22a
> +
> #define BTN_TRIGGER_HAPPY 0x2c0
> #define BTN_TRIGGER_HAPPY1 0x2c0
> #define BTN_TRIGGER_HAPPY2 0x2c1
> @@ -829,8 +837,21 @@ struct input_keymap_entry {
> #define ABS_MT_TOOL_X 0x3c /* Center X tool position */
> #define ABS_MT_TOOL_Y 0x3d /* Center Y tool position */
>
> -
> -#define ABS_MAX 0x3f
> +/* Drums and guitars (mostly toys) */
> +#define ABS_TOM_FAR_LEFT 0x40
> +#define ABS_TOM_LEFT 0x41
> +#define ABS_TOM_RIGHT 0x42
> +#define ABS_TOM_FAR_RIGHT 0x43
> +#define ABS_CYMBAL_FAR_LEFT 0x44
> +#define ABS_CYMBAL_LEFT 0x45
> +#define ABS_CYMBAL_RIGHT 0x46
> +#define ABS_CYMBAL_FAR_RIGHT 0x47
> +#define ABS_BASS 0x48
> +#define ABS_HI_HAT 0x49
> +#define ABS_FRET_BOARD 0x4a /* Guitar fret board, vertical
> pos */
> +#define ABS_WHAMMY_BAR 0x4b /* Guitar whammy bar (or
> vibrato) */
> +
> +#define ABS_MAX 0x4f
> #define ABS_CNT (ABS_MAX+1)
>
> /*
> --
> 1.8.4
>
--
Jiri Kosina
SUSE Labs
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