can't make FPGA into a USB Storage gadget device Petalinux 2017.3

[aynilian]

Attempting to make the FPGA work like a USB storage device. I followed the link:

http://www.wiki.xilinx.com/Zynq+Linux+USB+Device+Driver

The Section is under 

Peripheral Mode Kernel Configuration

 Did all the device tree and Kernel configurations and build an image. first of all, I'm missing the configfs.ko module in my build, even though I followed the kernel configuration options described in the link above.

I executed all the commands described in the Peripheral Mode.

Here below are the commands I typed in Zedboard build. I'm using Petalinux 2017.3.

Has anything change in the process?

Steps for mounting the sdcard for accessing the compiled modules
zynq> mount /dev/mmcblk0p1 /mnt

Install the following modules
zynq> insmod /mnt/configfs.ko   --- Thiis file does not exist
zynq> insmod /mnt/libcomposite.ko
zynq> insmod /mnt/usb_f_mass_storage.ko

zynq> dd if=/dev/zero of=/tmp/mydev count=10 bs=1M
zynq> mount -t configfs none /sys/kernel/config
zynq> cd /sys/kernel/config/usb_gadget
zynq> mkdir g1
zynq> cd g1
zynq> echo "64" > bMaxPacketSize0
zynq> echo "0x200" > bcdUSB
zynq> echo "0x100" > bcdDevice
zynq> echo "0x03FD" > idVendor
zynq> echo "0x0500" > idProduct
zynq> mkdir functions/mass_storage.ms0
Number of LUNs=8
Mass Storage Function, version: 2009/09/11
LUN: removable file: (no medium)
zynq> mkdir configs/c1.1
zynq> echo /tmp/mydev > functions/mass_storage.ms0/lun.0/file
zynq> echo 1 > functions/mass_storage.ms0/lun.0/removable
zynq> ln -s functions/mass_storage.ms0 configs/c1.1/
zynq> echo "ci_hdrc.0" > UDC  -- get an error here

I get an error on the last command

echo "ci_hdrc.0" > UDC

-sh: echo: Write error: No Such device

In Zedboard, there is a  /sys/class/udc  

Can someone point to what I'm doing wrong?

Thanks,

[aravindb]

Hi ,

You can try below steps for peripheral mode.

2.petalinux-config –c kernel

1. Device Drivers  ---> [*] USB support  ---> <*>   USB Gadget Support  ---> <M>   USB functions configurable through configfs (Change this as M)

                                                                                                                     --> <M>     Gadget Filesystem (Change this as M)

1. File systems -->Pseudo filesystems --> {M} Userspace-driven configuration filesystem (Change this as M)

Please add below change in this dtsi file: project-spec/meta-user/recipes-bsp/device-tree/files/system-user.dtsi  for peripheral mode.

/include/ "system-conf.dtsi"

/ {

};

&usb0 {

    status = "okay";

};

&dwc3_0 {

    status = "okay";

    dr_mode = "peripheral";

};

petalinux-build

petalinux-package --boot --fsbl images/linux/zynqmp_fsbl.elf --fpga images/linux/design_1_wrapper.bit --pmufw images/linux/pmufw.elf --u-boot

Inserting module in sequence:

 cd lib/modules/4.9.0-xilinx-v2017.3/

     cd kernel/fs/configfs/

     modprobe  configfs.ko

    cd ../..

     cd drivers/usb/gadget

     modprobe libcomposite.ko

     cd function/

    insmod usb_f_mass_storage.ko

     cd ../legacy/

    insmod gadgetfs.ko

     dd if=/dev/zero of=/tmp/mydev count=256 bs=1M

     insmod g_mass_storage.ko file=/tmp/mydev removable=1

after this step connect the USB male to male cable between target USB port and host USB port, it will detect as a USB drive.

Thanks & regards

Aravind

----------------------------------------------------------------------------------------------
Kindly note- Please mark the Answer as "Accept as solution" if information provided is helpful.

Give Kudos to a post which you think is helpful and reply oriented.
----------------------------------------------------------------------------------------------

[aynilian]

Hi Aravind,

Thanks for your response:

1. Kernel configuration, I followed your suggestion, but I could not change the

File systems --> Pseudo filesystme -- {M} Userspace-driven configuration filesystem  (to M)  it is stuck to -*- 

-*- Userspace-driven configuration filesystem

No matter what I typeed can't get rid of the -*- and change it to [M].

See image below.

2. Changing the dtsi file in <petalinux_proj>/meta-user/recipes-bsp/device-tree/files/system-user.dtsi gives build errors. Here was the original system-user.dtsi

Here are the suggested change to system-user.dtsi

Petalinux-build gives  device tree errors: See image below

I re- modified the system-user.dtsi to this: Let me know if this is okay.

Petalinux-build  (based on above system-user.dtsi)

3. petalinux-package --boot --fsbl images/linux/zynqmp_fsbl.elf --fpga images/linux/design_1_wrapper.bit --pmufw images/linux/pmufw.elf --u-boot

Closest match I can think of based on my /images/linux directory files is to do this:

petalinux-package --boot --fsbl images/linux/zynq_fsbl.elf --fpga images/linux/tutorial_wrapper.bit --pmufw images/linux/u-boot.elf --u-boot

executing this command:

petalinux-package --boot --fsbl images/linux/zynq_fsbl.elf --fpga images/linux/tutorial_wrapper.bit --pmufw images/linux/u-boot.elf --u-boot

I got errors:

ERROR: Invalid arg "--pmufw" for system arch "arm".

So I assumed to change the command to this;

petalinux-package --boot --fsbl images/linux/zynq_fsbl.elf --fpga images/linux/tutorial_wrapper.bit --u-boot images/linux/u-boot.elf --u-boot

command worked:

Copied BOOT.BIN and imag.ub to SD card: Now on FPGA Board:

cd /lib/modules/4.9.0-xilinx-v2017.3/kernel/

See below there is no /fs/configfs/ directory

modprobe configsfs.ko   does not work: (modprobe: module configfs.ko not foun in moudules.dep)

cd drivers/usb/gadget

modprobe libcomposite.ko (ok)

cd function/

insmod usb_f_mass_storage.ko (ok)

cd ../legacy/

insmod gadgetfs.ko 

>gadgetfs: USB Gadget filesystem, version 24 Aug 2004

dd if=/dev/zero of=/tmp/mydev cont=256 bs=1M

insmod g_mass_storage.ko

>udc-core: couldn't find an available UDC - added [g_mass_storage] to list of pending drivers

file=/tmp/mydev removable=1

Note:ignore  the console word wrap, I think buffer size has an issue that is why the text looks on top of each other.

Now I plugged a Type-A male USB in PC and u-usb in port (J13) that says OTG USB on the Zedboard. Did NOT see any USB enumeration on the PC.

[aynilian]

What is this below device tree modification you suggested in the system-user.dtsi mean?

&dwc3_0 {

    status = "okay";

    dr_mode = "peripheral";

};

There is no "&dwc3_0" reference in my pcw.dtsi, hence I get petalinux compile errors.

[aynilian · Accepted solution]

Hi Aravindb,

After many trials and errors, this is what seems to work for me on the  Zedboard with Zynq XC7Z020-1CLG484C using 2017.3 petalinux.

Device Tree modification

Kernel menu configuration:

after doing:

>petalinux-build

>petalinux-package --boot --fsbl images/linux/zynq_fsbl.elf --fpga images/linux/spi_design_1_wrapper.bit --pmufw images/linux/u-boot.elf --u-boot

Boot the Petalinux on my Target FPGA.

Then I had to create a disk drive directory:

cd /tmp

mkdir <my_disk_drive>

mount -a -t msdos /tmp/mydev  /tm/<my_disk_drive>

Plugged the micro-USB to FPGA target board USB port and the USB Type-A to windows. I see the removable storage drive of 128 megabytes. I formated it and copied files back and forth to it. Now I am in process of writing file operations in C program to create, open,  write, read, and close files on both sides of the interfaces (Linux and Windows).

Thanks!

[guanyishou]

Hi ! aynilian

     I got a same problem with you !  Can you please save me out..., I am using the same device of 7z020 and the same release of petalinux 2017.3. 

1) When I run "petalinux-package --boot --fsbl images/linux/zynq_fsbl.elf --fpga images/linux/spi_design_1_wrapper.bit --pmufw images/linux/u-boot.elf --u-boot",

    I got a error as "ERROR: Invalid arg "--pmufw" for system arch "arm"."

2)executing the command --"insmod g_mass_storage.ko", got a error as --"udc-core: couldn't find an available UDC - added [g_mass_storage] to list of pending drivers"

  Thanks !

[samick]

Hi,

I am using UZ3EG board, for me g_mass_storage.ko driver is not found.

configuration is attached.

also should I make dts change in &usb0 or &dwc3_0 ? below is my change :

&usb0 {
status = "okay";
};

&dwc3_0 {
status = "okay";
dr_mode = "peripheral";
phy-names = "usb3-phy";
};