search

xairy / raw-gadget

USB Raw Gadget — a low-level interface for the Linux USB Gadget subsystem
333 stars 35 forks source link

raw-gadget for linux-at91 kernel #4

Closed halfguru closed 4 years ago

halfguru commented 4 years ago

Hi,

I'm trying to create a usb device gadget with the Microchip linux-at91 kernel. I want to use it with a physicall usb controller and have replaced the driver_name and device_name to atmel_usba_udc and 500000.gadget respectively. I am not sure if I have the correct driver_name but I found it in /sys/class/udc/500000.gadget/device/uvent displaying DRIVER=atmel_usba_udc.

I am running the keyboard example code which works well with the dummy_hcd module. However, when I try to use it with the microchip usb controller, I get the following logging message:

event: connect, length: 0
event: control, length: 8
  bRequestType: 0x80 (IN), bRequest: 0x6, wValue: 0x100, wIndex: 0x0, wLength: 64
  type = USB_TYPE_STANDARD
  req = USB_REQ_GET_DESCRIPTOR
  descriptor = USB_DT_DEVICE
event: control, length: 8
  bRequestType: 0x80 (IN), bRequest: 0x6, wValue: 0x100, wIndex: 0x0, wLength: 18
  type = USB_TYPE_STANDARD
  req = USB_REQ_GET_DESCRIPTOR
  descriptor = USB_DT_DEVICE
ioctl(USB_RAW_IOCTL_EP0_WRITE): Connection reset by peer

which indicates a write failure with a USB_REQ_GET_DESCRIPTOR request with type USB_DT_DEVICE.

xairy commented 4 years ago

Hm, it's not immediately obvious to me what's wrong here. Do you see any errors in dmesg? What kind of board do you use to test this?

xairy commented 4 years ago

Please retest with the updated module and reopen if the issue still exists.