lkml.org 
[lkml]   [2010]   [Feb]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH][ALSA] usbmidi support for Access Music synths.
Sebastien Alaiwan wrote:
> Clemens Ladisch wrote:
>> Please run the checkpatch script on your patch.
>
> Done!
> I did not know such a tool did exist, thank you for pointing this out. Is there
> a document I could read about such rules of thumb?

Documentation/CodingStyle
Documentation/SubmitChecklist
Documentation/SubmittingDrivers
Documentation/SubmittingPatches

>> Does this device use more than one endpoint per direction? If not, this
>> could be done with QUIRK_MIDI_FIXED_ENDPOINT.
>
> There's only one endpoint per direction, but there are two cables per endpoint:
> endpoint 0x05, cable 0 : physical MIDI output port of the device.
> endpoint 0x05, cable 1 : synth (output: send note-on, etc...)
> endpoint 0x85, cable 0 : physical MIDI input port of the device.
> endpoint 0x85, cable 1 : synth (input: recv sysex, controller changes)
>
> Please correct me if I'm wrong, but it seems QUIRK_MIDI_FIXED_ENDPOINT would not
> do the job, otherwise where do I signal the number of cables?

With the bits in the out/in_cables fields.

> + u8 seq[] = { 0x4e, 0x73, 0x52, 0x01 }; /* "midi send" enable */

This should be static const.

> @@ -1407,6 +1407,9 @@ static struct port_info {
> EXTERNAL_PORT(0x086a, 0x0001, 8, "%s Broadcast"),
> EXTERNAL_PORT(0x086a, 0x0002, 8, "%s Broadcast"),
> EXTERNAL_PORT(0x086a, 0x0003, 4, "%s Broadcast"),
> + /* Access Music Virus TI */
> + EXTERNAL_PORT(0x133e, 0x0815, 0, "%s MIDI"),
> + CONTROL_PORT(0x133e, 0x0815, 1, "%s Control"),

According to your description, this is not a control port but should be
called "Synth". There is no helper macro for a generic MIDI port; use
something like this:

PORT_INFO(0x133e, 0x0815, 1, "%s Synth", numberofvoices,
SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |
SNDRV_SEQ_PORT_TYPE_MIDI_GM |
SNDRV_SEQ_PORT_TYPE_HARDWARE |
SNDRV_SEQ_PORT_TYPE_SYNTHESIZER),
and add flags for any other supported MIDI standards.

> + /* VirusTI Desktop */
> + USB_DEVICE_VENDOR_SPEC(0x133e, 0x0815),
> + .driver_info = (unsigned long) &(const struct snd_usb_audio_quirk) {
> + .ifnum = QUIRK_ANY_INTERFACE,
> + .type = QUIRK_COMPOSITE,
> + .data = &(const struct snd_usb_audio_quirk[]) {
> + {
> + /* "Virus TI MIDI" and "Virus TI Synth" */
> + .ifnum = 3,
> + .type = QUIRK_MIDI_ACCESSMUSIC,
> + },
> + {
> + .ifnum = -1
> + }
> + }
> + }
> +},

For only one interface, you don't need to use QUIRK_COMPOSITE; see the
entry for the UM-880.


Regards,
Clemens


\
 
 \ /
  Last update: 2010-02-11 09:49    [from the cache]
©2003-2011 Jasper Spaans