[alsa-devel] GR-55 Driver

[Daniel Mack]

On Thu, May 12, 2011 at 10:53 PM, Jeffrey Scott Flesher Gmail
<jeffrey.scott.flesher at gmail.com> wrote:
> Output from lsusb -v for Roland GR-55
> ******
>
> Bus 001 Device 008: ID 0582:0127 Roland Corp.
> Device Descriptor:
>  bLength                18
>  bDescriptorType         1
>  bcdUSB               2.00
>  bDeviceClass          255 Vendor Specific Class
>  bDeviceSubClass         0
>  bDeviceProtocol       255
>  bMaxPacketSize0        64
>  idVendor           0x0582 Roland Corp.
>  idProduct          0x0127
>  bcdDevice            0.01
>  iManufacturer           1
>  iProduct                2
>  iSerial                 0
>  bNumConfigurations      1
>  Configuration Descriptor:
>    bLength                 9
>    bDescriptorType         2
>    wTotalLength          167
>    bNumInterfaces          3
>    bConfigurationValue     1
>    iConfiguration          0
>    bmAttributes         0xc0
>      Self Powered
>    MaxPower                0mA
>    Interface Descriptor:
>      bLength                 9
>      bDescriptorType         4
>      bInterfaceNumber        0
>      bAlternateSetting       0
>      bNumEndpoints           0
>      bInterfaceClass       255 Vendor Specific Class
>      bInterfaceSubClass      2
>      bInterfaceProtocol      2
>      iInterface              0
>      ** UNRECOGNIZED:  06 24 f1 01 00 00
>    Interface Descriptor:
>      bLength                 9
>      bDescriptorType         4
>      bInterfaceNumber        0
>      bAlternateSetting       1
>      bNumEndpoints           1
>      bInterfaceClass       255 Vendor Specific Class
>      bInterfaceSubClass      2
>      bInterfaceProtocol      2
>      iInterface              0
>      ** UNRECOGNIZED:  07 24 01 01 00 01 00
>      ** UNRECOGNIZED:  0b 24 02 01 02 04 18 01 44 ac 00
>      Endpoint Descriptor:
>        bLength                 7
>        bDescriptorType         5
>        bEndpointAddress     0x05  EP 5 OUT
>        bmAttributes            5
>          Transfer Type            Isochronous
>          Synch Type               Asynchronous
>          Usage Type               Data
>        wMaxPacketSize     0x0070  1x 112 bytes
>        bInterval               1
>    Interface Descriptor:
>      bLength                 9
>      bDescriptorType         4
>      bInterfaceNumber        1
>      bAlternateSetting       0
>      bNumEndpoints           0
>      bInterfaceClass       255 Vendor Specific Class
>      bInterfaceSubClass      2
>      bInterfaceProtocol      1
>      iInterface              0
>    Interface Descriptor:
>      bLength                 9
>      bDescriptorType         4
>      bInterfaceNumber        1
>      bAlternateSetting       1
>      bNumEndpoints           1
>      bInterfaceClass       255 Vendor Specific Class
>      bInterfaceSubClass      2
>      bInterfaceProtocol      1
>      iInterface              0
>      ** UNRECOGNIZED:  07 24 01 07 00 01 00
>      ** UNRECOGNIZED:  0b 24 02 01 02 04 18 01 44 ac 00
>      Endpoint Descriptor:
>        bLength                 7
>        bDescriptorType         5
>        bEndpointAddress     0x84  EP 4 IN
>        bmAttributes           37
>          Transfer Type            Isochronous
>          Synch Type               Asynchronous
>          Usage Type               Implicit feedback Data
>        wMaxPacketSize     0x0070  1x 112 bytes
>        bInterval               1
>    Interface Descriptor:
>      bLength                 9
>      bDescriptorType         4
>      bInterfaceNumber        2
>      bAlternateSetting       0
>      bNumEndpoints           2
>      bInterfaceClass       255 Vendor Specific Class
>      bInterfaceSubClass      3
>      bInterfaceProtocol      0
>      iInterface              0
>      ** UNRECOGNIZED:  06 24 f1 02 02 02
>      Endpoint Descriptor:
>        bLength                 7
>        bDescriptorType         5
>        bEndpointAddress     0x03  EP 3 OUT
>        bmAttributes            2
>          Transfer Type            Bulk
>          Synch Type               None
>          Usage Type               Data
>        wMaxPacketSize     0x0200  1x 512 bytes
>        bInterval               1
>      Endpoint Descriptor:
>        bLength                 7
>        bDescriptorType         5
>        bEndpointAddress     0x82  EP 2 IN
>        bmAttributes            2
>          Transfer Type            Bulk
>          Synch Type               None
>          Usage Type               Data
>        wMaxPacketSize     0x0200  1x 512 bytes
>        bInterval               0
>    Interface Descriptor:
>      bLength                 9
>      bDescriptorType         4
>      bInterfaceNumber        2
>      bAlternateSetting       1
>      bNumEndpoints           2
>      bInterfaceClass       255 Vendor Specific Class
>      bInterfaceSubClass      3
>      bInterfaceProtocol      0
>      iInterface              0
>      Endpoint Descriptor:
>        bLength                 7
>        bDescriptorType         5
>        bEndpointAddress     0x03  EP 3 OUT
>        bmAttributes            2
>          Transfer Type            Bulk
>          Synch Type               None
>          Usage Type               Data
>        wMaxPacketSize     0x0200  1x 512 bytes
>        bInterval               1
>      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
>

Ok, that seems to be identical to the BOSS JS-8 layout, so it can be
handled by the generic audio driver.
Can you try the attached patch? Make sure you apply it against the
most recent ALSA tree found in the git repository at
git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6.git.

Thanks,
Daniel
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 0001-ALSA-snd-usb-add-quirks-for-Roland-GR-55.patch
Type: application/octet-stream
Size: 1180 bytes
Desc: not available
Url : http://mailman.alsa-project.org/pipermail/alsa-devel/attachments/20110513/b5792ff4/attachment.dll