Hi Roman, I don't know if you got any response in kernel-devel, I just wanted you to know that yes, alsa-devel is the correct list for sending patches to new USB sound device drivers, I see you got a verbose lsusb and a USB capture of the device's handshake. If it helps you, for the Pioneer additions you can find the kernel backlog, correct me if I'm wrong, the key was first adding a section in sound/usb/quirks-table.h with the correct rate information, EP numbers, transfer masks, etc. Please try adding your vendor spec EPs and associated interface number and altsetting inside sound/usb/quirks-table.h, by creating a new section. At this point, you are not creating a new driver per se, but boot with the extra kernel parameter snd_usb_audio.dyndbg=+p to get extra debugging information. I sincerely hope you are not dealing with Pioneer-like gear, because that would mean a ton of strange cryptographic MIDI SysEx's or bizarre CONTROL URBs to actually get silent inputs to activate. Yours, Geraldo Nascimento On Wed, Jun 2, 2021 at 5:36 PM Roman <klangrausch@xxxxxxxxxx> wrote: > > > Hello all, hello list, > I am not sure whether this is the correct list, since it's not strictly > an > ALSA affair (fw to kernel-devel). Recent progress on driver support for > Pioneer devices encouraged me to dissect USB communication with an > Allen&Heath Xone43C, a mixer with USB interface. It does feature 16 > channels > (8 in, 8 out), but only 4 (2 in, 2 out) show up, 2 of which remain > automagically > silent. There is no linux driver yet, and maybe I can help? > Addresses are: > 0x80 Endpoint 0 (in) > 0x00 Endpoint 0 (out) > 0x81 Endpoint 1 (in) Interface 2.1 and Interface 2.2 (vendor > spec) > 0x02 Endpoint 2 (out) Interface 1.1 and Interface 1.2 (vendor spec) > 0x85 Endpoint 5 (in) Interface 1.1 > 0x83 Endpoint 3 (in) Interface 3 MIDI > 0x04 Endpoint 4 (out) Interface 3 MIDI > > ---------------------------------- > > I have a sniff here: > https://drive.google.com/file/d/1UPXCN-r7jc9hfm1d-Hip8vckSs2RQNtC/view? > usp=sharing > > --------------------------------- > > USB info: > > Bus 001 Device 006: ID 22f0:000f Allen&Heath Xone:43C > Device Descriptor: > bLength 18 > bDescriptorType 1 > bcdUSB 2.00 > bDeviceClass 239 Miscellaneous Device > bDeviceSubClass 2 > bDeviceProtocol 1 Interface Association > bMaxPacketSize0 64 > idVendor 0x22f0 > idProduct 0x000f > bcdDevice 2.00 > iManufacturer 1 Allen&Heath > iProduct 2 Xone:43C > iSerial 3 no serial number > bNumConfigurations 1 > Configuration Descriptor: > bLength 9 > bDescriptorType 2 > wTotalLength 0x0126 > bNumInterfaces 4 > bConfigurationValue 1 > iConfiguration 0 > bmAttributes 0xc0 > Self Powered > MaxPower 0mA > 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 11 > bDescriptorType 36 > bDescriptorSubtype 1 (HEADER) > bcdADC 1.00 > wTotalLength 0x0035 > bInCollection 3 > baInterfaceNr(0) 1 > baInterfaceNr(1) 2 > baInterfaceNr(2) 3 > AudioControl Interface Descriptor: > bLength 12 > bDescriptorType 36 > bDescriptorSubtype 2 (INPUT_TERMINAL) > bTerminalID 1 > wTerminalType 0x0101 USB Streaming > bAssocTerminal 0 > bNrChannels 2 > wChannelConfig 0x0003 > Left Front (L) > Right Front (R) > iChannelNames 0 > iTerminal 0 > AudioControl Interface Descriptor: > bLength 9 > bDescriptorType 36 > bDescriptorSubtype 3 (OUTPUT_TERMINAL) > bTerminalID 2 > wTerminalType 0x0602 Digital Audio Interface > bAssocTerminal 0 > bSourceID 1 > iTerminal 0 > AudioControl Interface Descriptor: > bLength 12 > bDescriptorType 36 > bDescriptorSubtype 2 (INPUT_TERMINAL) > bTerminalID 3 > wTerminalType 0x0602 Digital Audio Interface > bAssocTerminal 0 > bNrChannels 2 > wChannelConfig 0x0003 > Left Front (L) > Right Front (R) > iChannelNames 0 > iTerminal 0 > AudioControl Interface Descriptor: > bLength 9 > bDescriptorType 36 > bDescriptorSubtype 3 (OUTPUT_TERMINAL) > bTerminalID 4 > wTerminalType 0x0101 USB Streaming > bAssocTerminal 0 > bSourceID 3 > iTerminal 0 > Interface Descriptor: > bLength 9 > bDescriptorType 4 > bInterfaceNumber 1 > bAlternateSetting 0 > bNumEndpoints 0 > bInterfaceClass 1 Audio > bInterfaceSubClass 2 Streaming > bInterfaceProtocol 0 > iInterface 0 > Interface Descriptor: > bLength 9 > bDescriptorType 4 > bInterfaceNumber 1 > bAlternateSetting 1 > bNumEndpoints 2 > bInterfaceClass 1 Audio > bInterfaceSubClass 2 Streaming > bInterfaceProtocol 0 > iInterface 0 > AudioStreaming Interface Descriptor: > bLength 7 > bDescriptorType 36 > bDescriptorSubtype 1 (AS_GENERAL) > bTerminalLink 1 > bDelay 1 frames > wFormatTag 0x0001 PCM > AudioStreaming Interface Descriptor: > bLength 11 > bDescriptorType 36 > bDescriptorSubtype 2 (FORMAT_TYPE) > bFormatType 1 (FORMAT_TYPE_I) > bNrChannels 2 > bSubframeSize 3 > bBitResolution 24 > bSamFreqType 1 Discrete > tSamFreq[ 0] 48000 > Endpoint Descriptor: > bLength 9 > bDescriptorType 5 > bEndpointAddress 0x02 EP 2 OUT > bmAttributes 5 > Transfer Type Isochronous > Synch Type Asynchronous > Usage Type Data > wMaxPacketSize 0x0126 1x 294 bytes > bInterval 4 > bRefresh 0 > bSynchAddress 133 > AudioStreaming Endpoint Descriptor: > bLength 7 > bDescriptorType 37 > bDescriptorSubtype 1 (EP_GENERAL) > bmAttributes 0x01 > Sampling Frequency > bLockDelayUnits 2 Decoded PCM samples > wLockDelay 0x0000 > Endpoint Descriptor: > bLength 9 > bDescriptorType 5 > bEndpointAddress 0x85 EP 5 IN > bmAttributes 1 > Transfer Type Isochronous > Synch Type None > Usage Type Data > wMaxPacketSize 0x0003 1x 3 bytes > bInterval 4 > bRefresh 5 > bSynchAddress 0 > Interface Descriptor: > bLength 9 > bDescriptorType 4 > bInterfaceNumber 1 > bAlternateSetting 2 > bNumEndpoints 1 > bInterfaceClass 255 Vendor Specific Class > bInterfaceSubClass 0 > bInterfaceProtocol 0 > iInterface 0 > Endpoint Descriptor: > bLength 9 > bDescriptorType 5 > bEndpointAddress 0x02 EP 2 OUT > bmAttributes 5 > Transfer Type Isochronous > Synch Type Asynchronous > Usage Type Data > wMaxPacketSize 0x0200 1x 512 bytes > bInterval 1 > bRefresh 0 > bSynchAddress 0 > Interface Descriptor: > bLength 9 > bDescriptorType 4 > bInterfaceNumber 2 > bAlternateSetting 0 > bNumEndpoints 0 > bInterfaceClass 1 Audio > bInterfaceSubClass 2 Streaming > bInterfaceProtocol 0 > iInterface 0 > Interface Descriptor: > bLength 9 > bDescriptorType 4 > bInterfaceNumber 2 > bAlternateSetting 1 > bNumEndpoints 1 > bInterfaceClass 1 Audio > bInterfaceSubClass 2 Streaming > bInterfaceProtocol 0 > iInterface 0 > AudioStreaming Interface Descriptor: > bLength 7 > bDescriptorType 36 > bDescriptorSubtype 1 (AS_GENERAL) > bTerminalLink 4 > bDelay 1 frames > wFormatTag 0x0001 PCM > AudioStreaming Interface Descriptor: > bLength 11 > bDescriptorType 36 > bDescriptorSubtype 2 (FORMAT_TYPE) > bFormatType 1 (FORMAT_TYPE_I) > bNrChannels 2 > bSubframeSize 3 > bBitResolution 24 > bSamFreqType 1 Discrete > tSamFreq[ 0] 48000 > Endpoint Descriptor: > bLength 9 > bDescriptorType 5 > bEndpointAddress 0x81 EP 1 IN > bmAttributes 5 > Transfer Type Isochronous > Synch Type Asynchronous > Usage Type Data > wMaxPacketSize 0x0126 1x 294 bytes > bInterval 4 > bRefresh 0 > bSynchAddress 0 > AudioStreaming Endpoint Descriptor: > bLength 7 > bDescriptorType 37 > bDescriptorSubtype 1 (EP_GENERAL) > bmAttributes 0x01 > Sampling Frequency > bLockDelayUnits 2 Decoded PCM samples > wLockDelay 0x0000 > Interface Descriptor: > bLength 9 > bDescriptorType 4 > bInterfaceNumber 2 > bAlternateSetting 2 > bNumEndpoints 1 > bInterfaceClass 255 Vendor Specific Class > bInterfaceSubClass 0 > bInterfaceProtocol 0 > iInterface 0 > Endpoint Descriptor: > bLength 9 > bDescriptorType 5 > bEndpointAddress 0x81 EP 1 IN > bmAttributes 5 > Transfer Type Isochronous > Synch Type Asynchronous > Usage Type Data > wMaxPacketSize 0x0200 1x 512 bytes > bInterval 1 > bRefresh 0 > bSynchAddress 0 > Interface Descriptor: > bLength 9 > bDescriptorType 4 > bInterfaceNumber 3 > 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 0x0041 > MIDIStreaming Interface Descriptor: > bLength 6 > bDescriptorType 36 > bDescriptorSubtype 2 (MIDI_IN_JACK) > bJackType 1 Embedded > bJackID 1 > iJack 0 > MIDIStreaming Interface Descriptor: > bLength 6 > bDescriptorType 36 > bDescriptorSubtype 2 (MIDI_IN_JACK) > bJackType 2 External > bJackID 2 > iJack 0 > MIDIStreaming Interface Descriptor: > bLength 9 > bDescriptorType 36 > bDescriptorSubtype 3 (MIDI_OUT_JACK) > bJackType 1 Embedded > bJackID 3 > bNrInputPins 1 > baSourceID( 0) 2 > BaSourcePin( 0) 1 > iJack 0 > MIDIStreaming Interface Descriptor: > bLength 9 > bDescriptorType 36 > bDescriptorSubtype 3 (MIDI_OUT_JACK) > bJackType 2 External > bJackID 4 > bNrInputPins 1 > baSourceID( 0) 1 > BaSourcePin( 0) 1 > iJack 0 > Endpoint Descriptor: > bLength 9 > bDescriptorType 5 > bEndpointAddress 0x83 EP 3 IN > bmAttributes 2 > Transfer Type Bulk > Synch Type None > Usage Type Data > wMaxPacketSize 0x0200 1x 512 bytes > bInterval 1 > bRefresh 0 > bSynchAddress 0 > MIDIStreaming Endpoint Descriptor: > bLength 5 > bDescriptorType 37 > bDescriptorSubtype 1 (GENERAL) > bNumEmbMIDIJack 1 > baAssocJackID( 0) 3 > Endpoint Descriptor: > bLength 9 > bDescriptorType 5 > bEndpointAddress 0x04 EP 4 OUT > bmAttributes 3 > Transfer Type Interrupt > Synch Type None > Usage Type Data > wMaxPacketSize 0x0010 1x 16 bytes > bInterval 4 > bRefresh 0 > bSynchAddress 0 > MIDIStreaming Endpoint Descriptor: > bLength 5 > bDescriptorType 37 > bDescriptorSubtype 1 (GENERAL) > bNumEmbMIDIJack 1 > baAssocJackID( 0) 1 > Device Qualifier (for other device speed): > bLength 10 > bDescriptorType 6 > bcdUSB 2.00 > bDeviceClass 0 > bDeviceSubClass 0 > bDeviceProtocol 0 > bMaxPacketSize0 64 > bNumConfigurations 1 > Device Status: 0x0001 > Self Powered > > --- > Best wishes, > Roman
