[U-Boot] Sam9g45 USB CDC

[Marcel]

Hi,

Never mind, I overlooked the string descriptors.
The funny thing is that the Linux host just continues where the windows host 
simply stops communicating with the device.

regards,
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)
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