Problem to use the USB OTG as gadget (peripheral) in linux

Altera_Forum · ‎05-22-2015

hi

I'm using the helio board from macnica with a SoC Cyclone V and I'm trying use the USB OTG of the board as device (gadget) in the linux.

My target is connect the board to my PC and I want that my PC recognize the board as HID device or CDC device.

With a little search in the web I discovered that I need enable the module libcomposite.ko and the module g_serial.ko.

The kernel image that I use is from the site: http://rocketboards.org/foswiki/documentation/alterasocltsikernel. I have tryed with the kernel 3.13 and 3.18.

When I use the kernel 3.13, I get the error:

root@socfpga:~/drivers# insmod libcomposite.ko // OK no error

root@socfpga:~/drivers# insmod g_serial.ko

Error: could not insert module g_serial.ko: No such device

in the dmesg have the message:

couldn't find an available UDC

I suppose that the error is because don't have the UDC (USB device controller) driver, I try enable the flag Designware/S3C HS/OtG USB Device controller in the

→ Device Drivers → USB support → USB Gadget Support → USB Peripheral Controller to enable the driver.

but when I try it the kernel compilation brike with the error:

make[3]: *** No rule to make target `drivers/usb/gadget/s3c-hsotg.o', needed by `drivers/usb/gadget/built-in.o'. Stop.

The most interesting is that in the drivers/usb/dwc2/Makefile have the follow message:

# NOTE: This driver at present only implements the Host mode

# of the controller. The existing s3c-hsotg driver supports

# Peripheral mode, but only for the Samsung S3C platforms.

# There are plans to merge the s3c-hsotg driver with this

# driver in the near future to create a dual-role driver. Once

# that is done, Host mode will become an optional feature that

# is selected with a config option.

In the kernel 3.18 this structure of the kernel was changed, but I have the same error when try execute the module the command "insmod g_serial.ko".

Someone know if the Altera give drivers to use the OTG as peripheral in the linux? If yes how I can do it?

Thanks,

Willian Henrique

Altera_Forum · ‎06-30-2015

Hi,

I have the encountered the same problem. I'm using De1-soc with some modification to use the usb in peripheral mode. Did you find a solution about the problem ?