I'm trying to establish a high performance USB connection from device/gadget to host. On the USB gadget side I'm running on a Atmel ATSAMA5D35-EK. The Linux Kernel version is 4.1 (4.1.0-linux4sam_5.2-00045-g633e08a) and I'm using configfs to set things up. I strictly followed the steps according to the presentations from the Embedded Linux Conference 2014 (by Alan Ott and Matt Porter) Here is what I did on the USB device side so far: # insmod atmel_usba_udc.ko # insmod usb_f_fs.ko # mkdir -p /home/root/configfs # mount -t configfs none /home/root/configfs # mkdir -p /home/root/configfs/usb_gadget/g1 # echo "0x1a0a" > /home/root/configfs/usb_gadget/g1/idVendor # echo "0xbadd" > /home/root/configfs/usb_gadget/g1/idProduct # mkdir -p /home/root/configfs/usb_gadget/g1/strings/0x409 # echo "1234" > /home/root/configfs/usb_gadget/g1/strings/0x409/serialnumber # echo "manufacturer" > /home/root/configfs/usb_gadget/g1/strings/0x409/manufacturer # echo "product" > /home/root/configfs/usb_gadget/g1/strings/0x409/product # mkdir -p /home/root/configfs/usb_gadget/g1/configs/c.1 # mkdir -p /home/root/configfs/usb_gadget/g1/configs/c.1/strings/0x409 # echo "Config1" > /home/root/configfs/usb_gadget/g1/configs/c.1/strings/0x409/configuration # mkdir -p /home/root/configfs/usb_gadget/g1/functions/ffs.usb0 # ln -s /home/root/configfs/usb_gadget/g1/functions/ffs.usb0 /home/root/configfs/usb_gadget/g1/configs/c.1 # mkdir -p /home/root/ffs # mount usb0 /home/root/ffs -t functionfs # cd /home/root/ffs # ../ffs-test 64 & Setting up the device and functionfs works perfectly fine, but when executing the ffs-test I get the following log messages: ffs-test: info: ep0: writing descriptors (in v2 format) ffs-test: info: ep0: writing strings ffs-test: dbg: ep1: starting ffs-test: dbg: ep2: starting ffs-test: info: ep0: starts ffs-test: info: ep2: starts ffs-test: info: ep1: starts ffs-test: warn: ep1: write: (-19) No such device ffs-test: warn: ep2: read: (-19) No such device ffs-test: info: ep1: ends ffs-test: info: ep2: ends Event BIND Event ENABLE On the host side I am using tools/usb/testusb.c which only performs test 0, 9 and 10 (probably because of the -19 error above?) sudo ./testusb -D /dev/bus/usb/002/006 ./testusb: /dev/bus/usb/002/006 may see only control tests /dev/bus/usb/002/006 test 0, 0.000011 secs /dev/bus/usb/002/006 test 9, 0.535505 secs /dev/bus/usb/002/006 test 10, 3.080686 secs Can anyone tell what might be causing "ep1: write" and "ep2: read" to fail with error (-19) No such device? Best regards Jan-- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
