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This version (04 Feb 2021 03:33) was approved by cathy fang.The Previously approved version (27 Jul 2020 07:29) is available.Diff

Table of Contents

USB Gadget Filesystem

This page provides how to use the USB Gadget fs on ADSP-SC5xx board, and it will include the below test:

  • USB gadget filesystem bulk mode
  • USB Gadget filesystem control mode

Hardware Configuration

Connect the USB micro-B plug cable into the USB HS/OTG Device port, as showing below:

Software Configuration

On the Yocto, Configure the linux-kernel as below to set the USB controller in Gadget only mode, and enable the USB Gadget Filesystem relevant options. 

$ bitbake linux-adi -c menuconfig

Configure the USB drivers to Gadget only mode (or Dual role mode ) 

Device Drivers  --->
	[*] USB support  --->
                <*>   Inventra Highspeed Dual Role Controller
                        MUSB Mode Selection (Gadget only mode)  --->
                        *** Platform Glue Layer *** 
                <*>     ADI
                        *** MUSB DMA mode ***
                [N]     Disable DMA (always use PIO)  
                [*]       Inventra
                <*>   USB Gadget Support  --->

Configure the Gadget Filesyetm support 

Device Drivers  --
->
	[*] USB support  --->
                <*>   USB Gadget Support  --->
                      <M>   USB Gadget precomposed configurations
                      <M>     Gadget Filesystem

Example Usage

on the target Ez-Kit board 

root@adsp-sc589-ezkit:~# modprobe gadgetfs
gadgetfs: USB Gadget filesystem, version 24 Aug 2004
root@adsp-sc589-ezkit:~# mkdir /dev/gadget
root@adsp-sc589-ezkit:~# mount -t gadgetfs gadgetfs /dev/gadget
root@adsp-sc589-ezkit:~# ls /dev/gadget/ -l
total 0
-rw-------    1 root     root             0 Jul 13 08:12 musb-hdrc
root@adsp-sc589-ezkit:~# gadgetfs-test -r "1.3" -v
gadgetfs: bound to musb-hdrc driver
/dev/gadget/musb-hdrc ep0 configured
serial="1.3"
gadgetfs: connected
 
** Mon Jul 13 08:13:28 2020gadgetfs: disconnected
 
CONNECT high speed
DISCONNECT
gadgetfs: connected
read 2 ep0 eventsgadgetfs: configuration #3
 
CONNECT high speed
SETUP 80.06 v0300 i0000 255
SETUP 80.06 v0302 i0409 255
SETUP 80.06 v0301 i0409 255
SETUP 80.06 v0303 i0409 255
SETUP 00.09 v0003 i0000 0
CONFIG #3
SETUP 80.06 v0304 i0409 255
SETUP 80.06 v0305 i0409 255
simple_sink_thread start -1234897824 fd 4
simple_source_thread start -1226505120 fd 5
SETUP 80.06 v0300 i0000 255
SETUP 80.06 v0305 i0409 255
SETUP 80.06 v03ee i0000 1024
... protocol stall 80.06

On the Linux-Host PC

  • Get the testusb

Please following the usbtest to get the resources:tools-software/linuxdsp/docs/linux-kernel-and-drivers/usb/usbtest/testusb.c. and then compile the source code with the command: 

gcc -Wall -g -pthread -o testusb testusb.c
  • run the gadget fs test
usb_gadget_fs.sh
#!/bin/sh
#set -x
lsmod |grep usbtest
sudo modprobe usbtest
lsmod |grep usbtest
sudo cat /sys/kernel/debug/usb/devices | grep -i "Manufacturer=Licensed to Code, LLC"
sudo cat /sys/kernel/debug/usb/devices | grep -i "Product=My Source/Sink Product"
 
lsusb|grep -i "Netchip Technology"|awk '{print $2" "$4}'
gadget_bus=$(lsusb|grep -i "Netchip Technology"|awk '{print $2}')
gadget_bus=`echo $gadget_bus | tr -cd "[0-9]"`
gadget_dev=$(lsusb|grep -i "Netchip Technology"|awk '{print $4}')
gadget_dev=`echo $gadget_dev | tr -cd "[0-9]"`
 
do_test()
{
  sudo ./testusb -D /dev/bus/usb/$gadget_bus/$gadget_dev -t${1}
}
 
echo "Gadget fs bulk mode test "
for i in $(seq 1 8)  
do   
do_test $i
done 
 
echo "Gadget fs control mode test "
do_test 9
do_test 10
  • Test log:
test@madara:~$ sh usb_gadget_fs.sh
usbtest                36864  0
S:  Manufacturer=Licensed to Code, LLC
S:  Product=My Source/Sink Product
002 040:
Gadget fs bulk mode test
./testusb: /dev/bus/usb/002/040 may see only control tests
/dev/bus/usb/002/040 test 1 --> 110 (Connection timed out)
./testusb: /dev/bus/usb/002/040 may see only control tests
/dev/bus/usb/002/040 test 2 --> 110 (Connection timed out)
./testusb: /dev/bus/usb/002/040 may see only control tests
/dev/bus/usb/002/040 test 3 --> 110 (Connection timed out)
./testusb: /dev/bus/usb/002/040 may see only control tests
/dev/bus/usb/002/040 test 4 --> 110 (Connection timed out)
./testusb: /dev/bus/usb/002/040 may see only control tests
/dev/bus/usb/002/040 test 5 --> 110 (Connection timed out)
./testusb: /dev/bus/usb/002/040 may see only control tests
/dev/bus/usb/002/040 test 6 --> 110 (Connection timed out)
./testusb: /dev/bus/usb/002/040 may see only control tests
/dev/bus/usb/002/040 test 7 --> 110 (Connection timed out)
./testusb: /dev/bus/usb/002/040 may see only control tests
/dev/bus/usb/002/040 test 8 --> 110 (Connection timed out)
Gadget fs control mode test
./testusb: /dev/bus/usb/002/040 may see only control tests
/dev/bus/usb/002/040 test 9 --> 110 (Connection timed out)
./testusb: /dev/bus/usb/002/040 may see only control tests
/dev/bus/usb/002/040 test 10 --> 110 (Connection timed out)

error log one board side 

SETUP 01.0b v0000 i0000 0
musb_g_ep0_irq 691: SetupEnd came in a wrong ep0stage wait
musb_g_ep0_irq 691: SetupEnd came in a wrong ep0stage wait
musb_g_ep0_irq 691: SetupEnd came in a wrong ep0stage wait
musb_g_ep0_irq 691: SetupEnd came in a wrong ep0stage wait
musb_g_ep0_irq 691: SetupEnd came in a wrong ep0stage wait
musb_g_ep0_irq 691: SetupEnd came in a wrong ep0stage wait
musb_g_ep0_irq 691: SetupEnd came in a wrong ep0stage wait
musb_g_ep0_irq 691: SetupEnd came in a wrong ep0stage wait
musb_g_ep0_irq 691: SetupEnd came in a wrong ep0stage wait

Go TO USB Interface

resources/tools-software/linuxdsp/docs/linux-kernel-and-drivers/usb/device_mode/gadget_fs.txt · Last modified: 04 Feb 2021 03:33 by cathy fang

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