But that's it. On the host side, the device is detected for a brief
moment - I managed to get the device info, and it looks like the real
deal:
Gadget Serial v2.4:
Product ID: 0xa4a7
Vendor ID: 0x0525 (PLX Technology, Inc.)
Version: 4.05
Speed: Up to 480 Mb/sec
Manufacturer: Linux 4.5.0+ with atmel_usba_udc
Location ID: 0x14200000 / 6
Current Available (mA): 1000
Extra Operating Current (mA): 0
But then it disappears completely. I have tried it on a Windows, a
Linux and a OS X machine to rule out a problem on the host side. I
have also tried it with the binary kernel the manufacturer provides,
but I couldn't even replicate this limited success I had. I have not
been able to figure out what I am doing wrong, so any help is
appreciated.
Thanks,
Bálint
2016-03-29 5:12 GMT+02:00 JB <jbworld.central@xxxxxxxxx>:
> Hello,
>
> I am trying to figure out how to get a g_serial device running on the
> Acme Acqua board built around the Atmel SAMA5D3. I am using an
> unmodified 4.5 kernel with a configuration and a dts file provided by
> Acme (originally for kernel version 4.4.5, but the problems I
> encountered appear to be the same on earlier versions). I have enabled
> gadget support and the serial gadget device using menuconfig,
> alongside CONFIG_USB_ATMEL_USBA. But it doesn't work.
>
> I have enabled the verbose debugging options and captured the
> following messages:
>
> atmel_usba_udc 500000.gadget: MMIO registers at 0xf8030000 mapped at d08d8000
> atmel_usba_udc 500000.gadget: FIFO at 0x00500000 mapped at d2200000
> userial_init: registered 4 ttyGS* devices
> udc 500000.gadget: registering UDC driver [g_serial]
> g_serial gadget: adding 'acm'/cfb53a00 to config 'CDC ACM config'/c0775adc
> g_serial gadget: acm ttyGS0: dual speed IN/ep1 OUT/ep2 NOTIFY/ep3
> g_serial gadget: Gadget Serial v2.4
> g_serial gadget: g_serial ready
> ...
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