[U-Boot] Sam9g45 USB CDC

[Marcel]

Hi,

It looks like I've got most thing implemented regarding USB CDC for the 
Sam9g45. I do however have some basic questions.

One of the things is that I don't see any descriptors in Windows. I installed 
some inf file found on the net for Ethernet RNDIS but maybe that was wrong. 
Is there any Windows driver available for the Linux CDC interface ?

Second I connected the device to my Linux host and dmesg says looks a bit 
better :

usb 1-4: USB disconnect, address 39
usb 1-4: new high speed USB device using ehci_hcd and address 40
usb 1-4: New USB device found, idVendor=0525, idProduct=a4a1
usb 1-4: New USB device strings: Mfr=1, Product=2, SerialNumber=0
usb 1-4: Product: Ethernet Gadget
usb 1-4: Manufacturer: Atmel AT91SAM9G45
usb 1-4: configuration #1 chosen from 1 choice

lusb output is shown below.  I see the following line : 
iMacAddress                      3 (??)
Is this normal or did I perhaps miss something crucial here ?

One thing I notice is that things are rather slow in Linux and probably also 
the reason why things don't work in windows yet. It takes a couple of seconds 
for lsusb to show information and my guess is that still something is wrong.

Best regards,
Marcel

$lsusb -v -d 0525:a4a1

Bus 001 Device 036: ID 0525:a4a1 Netchip Technology, Inc. Linux-USB Ethernet 
Gadget
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass            2 Communications
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0        64
  idVendor           0x0525 Netchip Technology, Inc.
  idProduct          0xa4a1 Linux-USB Ethernet Gadget
  bcdDevice            3.18
  iManufacturer           1 
  iProduct                2 
  iSerial                 0 
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           80
    bNumInterfaces          2
    bConfigurationValue     1
    iConfiguration          7 
    bmAttributes         0xc0
      Self Powered
    MaxPower                2mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass         2 Communications
      bInterfaceSubClass      6 Ethernet Networking
      bInterfaceProtocol      0 
      iInterface              5 
      CDC Header:
        bcdCDC               1.10
      CDC Union:
        bMasterInterface        0
        bSlaveInterface         1 
      CDC Ethernet:
        iMacAddress                      3 (??)
        bmEthernetStatistics    0x00000000
        wMaxSegmentSize               1536
        wNumberMCFilters            0x0000
        bNumberPowerFilters              0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x83  EP 3 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0010  1x 16 bytes
        bInterval               9
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       0
      bNumEndpoints           0
      bInterfaceClass        10 CDC Data
      bInterfaceSubClass      0 Unused
      bInterfaceProtocol      0 
      iInterface              0 
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       1
      bNumEndpoints           2
      bInterfaceClass        10 CDC Data
      bInterfaceSubClass      0 Unused
      bInterfaceProtocol      0 
      iInterface              4 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x02  EP 2 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
can't get device qualifier: Connection timed out
can't get debug descriptor: Connection timed out
cannot read device status, Connection timed out (110)