This version (27 Jul 2020 07:29) was approved by cathy fang.The Previously approved version (15 Jul 2020 10:40) is available.
Table of Contents
USB Gadget Mass storage
This page provides how to use the USB Gadget mass storage on ADSP-SC5xx board, and it will include the below test:
- USB gadget mass storage ram test
- USB Gadget mass storage hd test
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 Mass Storage 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 Mass Storage Support
Device Drivers --
->
[*] USB support --->
<*> USB Gadget Support --->
<M> USB Gadget precomposed configurations
<M> Mass Storage Gadget
Example Usage
on the target Ez-Kit board
root@adsp-sc589-ezkit:~# dd if=/dev/zero of=/fsg.block bs=1M count=16 16+0 records in 16+0 records out root@adsp-sc589-ezkit:~# modprobe g_mass_storage file=/fsg.block stall=0 Mass Storage Function, version: 2009/09/11 LUN: removable file: (no medium) LUN: file: /fsg.block Number of LUNs=1 g_mass_storage gadget: Mass Storage Gadget, version: 2009/09/11 g_mass_storage gadget: userspace failed to provide iSerialNumber g_mass_storage gadget: g_mass_storage ready g_mass_storage gadget: high-speed config #1: Linux File-Backed Storage
On the Linux-Host PC
- Fdisk and format the usb mass storage
root@madara:~# sudo su root@madara:~# ls /dev/sdb /dev/sdb root@madara:~# time fdisk /dev/sdb Welcome to fdisk (util-linux 2.31.1). Changes will remain in memory only, until you decide to write them. Be careful before using the write command. Device does not contain a recognized partition table. Created a new DOS disklabel with disk identifier 0x7459b8e4. Command (m for help): n Partition type p primary (0 primary, 0 extended, 4 free) e extended (container for logical partitions) Select (default p): p Partition number (1-4, default 1): 1 First sector (2048-32767, default 2048): Last sector, +sectors or +size{K,M,G,T,P} (2048-32767, default 32767): Created a new partition 1 of type 'Linux' and of size 15 MiB. Command (m for help): w The partition table has been altered. Calling ioctl() to re-read partition table. Syncing disks. real 0m10.807s user 0m0.000s sys 0m0.008s root@madara:~# mke2fs /dev/sdb1 mke2fs 1.44.1 (24-Mar-2018) Creating filesystem with 15360 1k blocks and 3840 inodes Filesystem UUID: 3bd2120b-eca2-4c8f-9eb6-c408f9c1c0d9 Superblock backups stored on blocks: 8193 Allocating group tables: done Writing inode tables: done Writing superblocks and filesystem accounting information: done
- Read/write test
root@madara:~# mkdir /met/usb root@madara:~# mount /dev/sdb1 /mnt/usb/ root@madara:~# date; time dd if=/dev/zero of=/mnt/usb/10m.bin bs=1M Tuesday 14 July 2020 15:09:16 CST dd: error writing '/mnt/usb/10m.bin': No space left on device 15+0 records in 14+0 records out 15032320 bytes (15 MB, 14 MiB) copied, 8.89978 s, 1.7 MB/s real 0m8.901s user 0m0.000s sys 0m0.309s root@madara:~# ls -lh /mnt/usb total 15M -rw-r--r-- 1 root root 15M July 14 16:08 10m.bin drwx------ 2 root root 12K July 14 15:52 lost+found root@madara:~# rm /mnt/usb/10m.bin root@madara:~# ls -lh /mnt/usb/ total 12K drwx------ 2 root root 12K July 14 15:52 lost+found root@madara:~# umount /mnt/usb
Go TO USB Interface
resources/tools-software/linuxdsp/docs/linux-kernel-and-drivers/usb/device_mode/gadget_mass_storage.txt · Last modified: 27 Jul 2020 07:29 by cathy fang