Hallo, Hartmut Geissbauer hat gesagt: // Hartmut Geissbauer wrote: > reading the different entries in usbquirks.h it looks like they are > taken from the usb-infos like lsusb provides. Is it very difficult to > take the infos from lsusb and translate it to an quirk? > I only need some quick advice and will try it by myself. A good > (complex) example in my opinion is the "Roland SC-D70".
Well, others like Takashi or Clemens will be able to give better answers,but I guess, it helps to get familiar with the USB-audio specification. For example, for a short time I was investigating why the Midi jacks on the Terratec Phase 26 aren't supported. I looked up the specification of usb-midi in http://www.usb.org/developers/devclass_docs/midi10.pdf and also looked very closely and for a long time at the lsusb output. This interface descriptor then looks very much like it must be the midi interface: Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 3 bAlternateSetting 0 bNumEndpoints 2 bInterfaceClass 255 Vendor Specific Class bInterfaceSubClass 3 bInterfaceProtocol 0 iInterface 3 TerraTec PHASE 26 USB unknown descriptor type: 07 24 01 00 01 41 00 unknown descriptor type: 06 24 02 01 10 00 unknown descriptor type: 06 24 02 02 11 00 unknown descriptor type: 09 24 03 01 12 01 11 01 00 unknown descriptor type: 09 24 03 02 13 01 10 01 00 Endpoint Descriptor: bLength 9 bDescriptorType 5 bEndpointAddress 0x05 EP 5 OUT bmAttributes 2 Transfer Type Bulk Synch Type none wMaxPacketSize 64 bInterval 0 bRefresh 0 bSynchAddress 0 unknown descriptor type: 05 25 01 01 10 Endpoint Descriptor: bLength 9 bDescriptorType 5 bEndpointAddress 0x86 EP 6 IN bmAttributes 2 Transfer Type Bulk Synch Type none wMaxPacketSize 64 bInterval 0 bRefresh 0 bSynchAddress 0 unknown descriptor type: 05 25 01 01 12 Language IDs: (length=4) 0409 English(US) The main reason for my assumption is the value for bInterfaceNumber which is "3" or 0x03 as it should be according to the USB spec which requires for a "MIDI Adapter Standard MIDIStreaming Interface Descriptor" to have this field set as follows: Offset Field Size Value Description ... 6 bInterfaceSubclass 1 0x03 MIDISTREAMING. ... All other bInterfaceNumber's in the Phase 26 output are *not* 3. (See my entry on qbik.ch). Unfortunatly that's as far as I got. I figure, now a quirk is needed, but I don't know which one (it probably has something to do with the endpoints or so.) Nevertheless I don't have the Phase 26 anymore, so I cannot dig much deeper. ciao -- Frank Barknecht _ ______footils.org__ ------------------------------------------------------- The SF.Net email is sponsored by EclipseCon 2004 Premiere Conference on Open Tools Development and Integration See the breadth of Eclipse activity. February 3-5 in Anaheim, CA. http://www.eclipsecon.org/osdn _______________________________________________ Alsa-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-devel
