[alsa-devel] Roland UM-ONE support
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I am in need of adding UM-ONE support. I believe this interface is simply a repackaged UM-1G, but ALSA 1.0.17 simply won't recognize it. Being new to this level of development, any clues as to how to add this interface support would be welcome. I'd first like to start off by assuming it will work as a UM-1G. If it doesn't, then I'll have to dig deeper.
Thanks,
Robert
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Am Sonntag, den 12.06.2011, 22:34 -0700 schrieb xl600@teamspode.org:
I am in need of adding UM-ONE support. I believe this interface is simply a repackaged UM-1G, but ALSA 1.0.17 simply won't recognize it.
[…]
ALSA 1.0.17 is pretty old. I guess you should try the current version 1.0.24.2 or build it from source.
If you still have problems you should read the debug information [2] and provide the necessary information if you still encounter problems.
Thanks,
Paul
[1] http://www.alsa-project.org/main/index.php/Main_Page [2] http://www.alsa-project.org/main/index.php/Help_To_Debug
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I looked through the 1.0.24.2 code and couldn't find any mention of the UM-ONE or it's product ID. Not a surprise considering this came out only a few days ago.
The UM-1G:
Bus 005 Device 003: ID 0582:0105 Roland Corp. Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 1.10 bDeviceClass 0 (Defined at Interface level) bDeviceSubClass 0 bDeviceProtocol 0 bMaxPacketSize0 64 idVendor 0x0582 Roland Corp. idProduct 0x0105 bcdDevice 1.00 iManufacturer 1 Roland iProduct 2 UM-1G iSerial 0 bNumConfigurations 1 Configuration Descriptor: bLength 9 bDescriptorType 2 wTotalLength 101 bNumInterfaces 2 bConfigurationValue 1 iConfiguration 0 bmAttributes 0x80 MaxPower 60mA Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 0 bAlternateSetting 0 bNumEndpoints 0 bInterfaceClass 1 Audio bInterfaceSubClass 1 Control Device bInterfaceProtocol 0 iInterface 0 AudioControl Interface Descriptor: bLength 9 bDescriptorType 36 bDescriptorSubtype 1 (HEADER) bcdADC 1.00 wTotalLength 9 bInCollection 1 baInterfaceNr( 0) 1 Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 1 bAlternateSetting 0 bNumEndpoints 2 bInterfaceClass 1 Audio bInterfaceSubClass 3 MIDI Streaming bInterfaceProtocol 0 iInterface 0 MIDIStreaming Interface Descriptor: bLength 7 bDescriptorType 36 bDescriptorSubtype 1 (HEADER) bcdADC 1.00 wTotalLength 65 MIDIStreaming Interface Descriptor: bLength 6 bDescriptorType 36 bDescriptorSubtype 2 (MIDI_IN_JACK) bJackType 1 Embedded bJackID 64 iJack 0 MIDIStreaming Interface Descriptor: bLength 6 bDescriptorType 36 bDescriptorSubtype 2 (MIDI_IN_JACK) bJackType 2 External bJackID 128 iJack 0 MIDIStreaming Interface Descriptor: bLength 9 bDescriptorType 36 bDescriptorSubtype 3 (MIDI_OUT_JACK) bJackType 1 Embedded bJackID 32 bNrInputPins 1 baSourceID( 0) 128 BaSourcePin( 0) 1 iJack 0 MIDIStreaming Interface Descriptor: bLength 9 bDescriptorType 36 bDescriptorSubtype 3 (MIDI_OUT_JACK) bJackType 2 External bJackID 16 bNrInputPins 1 baSourceID( 0) 64 BaSourcePin( 0) 1 iJack 0 Endpoint Descriptor: bLength 9 bDescriptorType 5 bEndpointAddress 0x01 EP 1 OUT bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0040 1x 64 bytes bInterval 0 bRefresh 0 bSynchAddress 0 MIDIStreaming Endpoint Descriptor: bLength 5 bDescriptorType 37 bDescriptorSubtype 1 (GENERAL) bNumEmbMIDIJack 1 baAssocJackID( 0) 64 Endpoint Descriptor: bLength 9 bDescriptorType 5 bEndpointAddress 0x81 EP 1 IN bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0040 1x 64 bytes bInterval 0 bRefresh 0 bSynchAddress 0 MIDIStreaming Endpoint Descriptor: bLength 5 bDescriptorType 37 bDescriptorSubtype 1 (GENERAL) bNumEmbMIDIJack 1 baAssocJackID( 0) 32
That appears as a pretty normal MIDI interface.
The UM-ONE however, does not seem to be following the same rules:
Bus 005 Device 004: ID 0582:012a Roland Corp. Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 1.10 bDeviceClass 255 Vendor Specific Class bDeviceSubClass 0 bDeviceProtocol 255 bMaxPacketSize0 64 idVendor 0x0582 Roland Corp. idProduct 0x012a bcdDevice 1.00 iManufacturer 1 Roland iProduct 2 UM-ONE iSerial 0 bNumConfigurations 1 Configuration Descriptor: bLength 9 bDescriptorType 2 wTotalLength 67 bNumInterfaces 1 bConfigurationValue 1 iConfiguration 0 bmAttributes 0x80 MaxPower 70mA Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 0 bAlternateSetting 0 bNumEndpoints 2 bInterfaceClass 255 Vendor Specific Class bInterfaceSubClass 3 bInterfaceProtocol 0 iInterface 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x02 EP 2 OUT bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0040 1x 64 bytes bInterval 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x81 EP 1 IN bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0040 1x 64 bytes bInterval 0 Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 0 bAlternateSetting 1 bNumEndpoints 2 bInterfaceClass 255 Vendor Specific Class bInterfaceSubClass 3 bInterfaceProtocol 0 iInterface 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x02 EP 2 OUT bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0040 1x 64 bytes bInterval 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x81 EP 1 IN bmAttributes 3 Transfer Type Interrupt Synch Type None Usage Type Data wMaxPacketSize 0x0040 1x 64 bytes bInterval 1
Obviously, alsa will not be able to detect this as a generic USB midi interface. Roland seems to have ignored the USB standard and set the bInterfaceClass to a non standard value (Should be 0x01). Is this doom for alsa and the UM-ONE then?
ALSA 1.0.17 is pretty old. I guess you should try the current version 1.0.24.2 or build it from source.
If you still have problems you should read the debug information [2] and provide the necessary information if you still encounter problems.
Thanks,
Paul
[1] http://www.alsa-project.org/main/index.php/Main_Page [2] http://www.alsa-project.org/main/index.php/Help_To_Debug
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Hello,
I couldn't find any mention of it too in alsa. I could be fine if you could explain us how to add the support.
Damien
participants (3)
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Damien Dejean
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Paul Menzel
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xl600@teamspode.org