Hi Peter, Peter Chen wrote: > The step at the board: > > root@freescale ~$ modprobe libcomposite I guess this step is unneccessary, and that all neccessary modules are loaded automatically on demand. > root@freescale ~$ mount none /sys/kernel/config/ -t configfs > root@freescale ~$ mkdir /sys/kernel/config/usb_gadget/g1 > root@freescale ~$ cd /sys/kernel/config/usb_gadget/g1/ > root@freescale /sys/kernel/config/usb_gadget/g1$ echo 0x15a2 > idVendor > root@freescale /sys/kernel/config/usb_gadget/g1$ echo 0x0054 > idProduct > root@freescale /sys/kernel/config/usb_gadget/g1$ mkdir strings/0x409 > root@freescale /sys/kernel/config/usb_gadget/g1$ echo 123456ABCDEF > strings/0x409/serialnumber > root@freescale /sys/kernel/config/usb_gadget/g1$ echo Freescale > strings/0x409/manufacturer > root@freescale /sys/kernel/config/usb_gadget/g1$ echo "FSL i.mx6q sabreSD Board" > strings/0x409/product I guess you also did a "mkdir configs/c.1" step here? > root@freescale /sys/kernel/config/usb_gadget/g1$ echo 5 > configs/c.1/MaxPower > root@freescale /sys/kernel/config/usb_gadget/g1$ mkdir functions/mass_storage.1 > Number of LUNs=8 > Mass Storage Function, version: 2009/09/11 > LUN: removable file: (no medium) > root@freescale /sys/kernel/config/usb_gadget/g1$ echo "/dev/mmcblk0p1" > functions/mass_storage.1/lun.0/file > > root@freescale /sys/kernel/config/usb_gadget/g1$ mkdir functions/gser.1 > root@freescale /sys/kernel/config/usb_gadget/g1$ cat functions/gser.1/port_num > 0 So far so good! You've created two functions in the gadget, following gadget_configfs.txt up to and including section 3. Section 4. comes next, which wasn't included in your list of commands. "Associating the functions with their configurations" ln -s functions/<name>.<instance name> configs/<name>.<number> I assume that this results in having only a single configuration with two interfaces. > - Why mass storage has been chosen at PC, but not gserial? Probably because the host (PC) doesn't have a driver for gserial with your chosen vid+pid. > - Is it possible both two configurations can be seen at PC? > If possible, how to do? Both configurations *are* seen by the host - but only one configuration of a USB device can be selected at any one time. If you want both functions available simultaneously then they must be two different interfaces within a single configuration. I believe the symlink described in gadget_configfs.txt section 4. accomplishes that. > - How to choose gserial? I tried to remove the configuration > of mass storage, but both of configurations have been removed I guess that you will need to add your vid+pid to the host driver. > root@freescale /sys/kernel/config/usb_gadget/g1$ rm -rf configs/c.2/mass_storage.1/ Where does configs/c.2 come from? It wasn't mentioned before in your steps? Best regards //Peter -- 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
