Hi Allan, On 12.08.2012 15:47, allan walker wrote: > i have asked this question before but seeing as it was some time ago, > and there has been no further response, i'll ask again :) > Is it possible for this device to be supported by the ALSA driver? > my alsascript results are here > http://www.alsa-project.org/db/?f=d444ad0ee58b3994ee1c91e5ed4415bb2416f486 > and > lsusb -v (cropped to relevant bus)
The descriptors don't tell anything about class compliance, and it also doesn't look like there are any interfaces that are compliant but marked vendor specific. Hence, I have litte hope the generic driver can do anything useful here. The protocol implemented by the hardware might be related to what the other Tascam interfaces speak, namely those which are supported by sound/usb/usx2y/ - you could try adding the IDs of your device to the match table (sound/usb/usx2y/usbusx2y.c, snd_usX2Y_usb_id_table). If that doesn't work, you would need to trace the communication of that device under Windows with the vendor driver and reverse-engineer the command sequences. And then see which driver could be modified to support that device or if a new one needs to be written. In that case, look around for a Windows software solution that works for you (can't give you any recommendation here). All this is something which needs to be done by someone with access to the hardware, so you're pretty much on your own for now unfortunately. But once you have any further details, please let us know. HTH, Daniel > Bus 002 Device 002: ID 0644:8030 TEAC Corp. > Couldn't open device, some information will be missing > Device Descriptor: > bLength 18 > bDescriptorType 1 > bcdUSB 2.00 > bDeviceClass 255 Vendor Specific Class > bDeviceSubClass 255 Vendor Specific Subclass > bDeviceProtocol 255 Vendor Specific Protocol > bMaxPacketSize0 64 > idVendor 0x0644 TEAC Corp. > idProduct 0x8030 > bcdDevice 1.00 > iManufacturer 1 > iProduct 2 > iSerial 3 > bNumConfigurations 1 > Configuration Descriptor: > bLength 9 > bDescriptorType 2 > wTotalLength 80 > bNumInterfaces 2 > bConfigurationValue 1 > iConfiguration 0 > bmAttributes 0x40 > (Missing must-be-set bit!) > Self Powered > MaxPower 0mA > Interface Descriptor: > bLength 9 > bDescriptorType 4 > bInterfaceNumber 0 > bAlternateSetting 0 > bNumEndpoints 0 > bInterfaceClass 255 Vendor Specific Class > bInterfaceSubClass 0 > bInterfaceProtocol 0 > iInterface 0 > Interface Descriptor: > bLength 9 > bDescriptorType 4 > bInterfaceNumber 0 > bAlternateSetting 1 > bNumEndpoints 3 > bInterfaceClass 255 Vendor Specific Class > bInterfaceSubClass 0 > bInterfaceProtocol 0 > iInterface 0 > Endpoint Descriptor: > bLength 7 > bDescriptorType 5 > bEndpointAddress 0x02 EP 2 OUT > bmAttributes 5 > Transfer Type Isochronous > Synch Type Asynchronous > Usage Type Data > wMaxPacketSize 0x009c 1x 156 bytes > bInterval 1 > Endpoint Descriptor: > bLength 7 > bDescriptorType 5 > bEndpointAddress 0x83 EP 3 IN > bmAttributes 2 > Transfer Type Bulk > Synch Type None > Usage Type Data > wMaxPacketSize 0x0200 1x 512 bytes > bInterval 4 > Endpoint Descriptor: > bLength 7 > bDescriptorType 5 > bEndpointAddress 0x04 EP 4 OUT > bmAttributes 2 > Transfer Type Bulk > Synch Type None > Usage Type Data > wMaxPacketSize 0x0200 1x 512 bytes > bInterval 4 > Interface Descriptor: > bLength 9 > bDescriptorType 4 > bInterfaceNumber 1 > bAlternateSetting 0 > bNumEndpoints 0 > bInterfaceClass 255 Vendor Specific Class > bInterfaceSubClass 0 > bInterfaceProtocol 0 > iInterface 0 > Interface Descriptor: > bLength 9 > bDescriptorType 4 > bInterfaceNumber 1 > bAlternateSetting 1 > bNumEndpoints 2 > bInterfaceClass 255 Vendor Specific Class > bInterfaceSubClass 0 > bInterfaceProtocol 0 > iInterface 0 > Endpoint Descriptor: > bLength 7 > bDescriptorType 5 > bEndpointAddress 0x81 EP 1 IN > bmAttributes 5 > Transfer Type Isochronous > Synch Type Asynchronous > Usage Type Data > wMaxPacketSize 0x0040 1x 64 bytes > bInterval 4 > Endpoint Descriptor: > bLength 7 > bDescriptorType 5 > bEndpointAddress 0x86 EP 6 IN > bmAttributes 2 > Transfer Type Bulk > Synch Type None > Usage Type Data > wMaxPacketSize 0x0200 1x 512 bytes > bInterval 1 > > many thanks for any relies, and or, updates, if this is already being > worked on. > Allan > > > > ------------------------------------------------------------------------------ > Live Security Virtual Conference > Exclusive live event will cover all the ways today's security and > threat landscape has changed and how IT managers can respond. Discussions > will include endpoint security, mobile security and the latest in malware > threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ > > > > _______________________________________________ > Alsa-user mailing list > Alsa-user@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/alsa-user > ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user
