Hello 楠 邹,
Please refer to the following Kernel configuration.
Device Drivers --->
USB support --->
<*> Support for Host-side USB
<*> EHCI HCD (USB 2.0) support
-*- Root Hub Transaction Translators
[ ] Use Xilinx usb host EHCI controller core
[*] Support for Freescale PPC on-chip EHCI USB
controller
Device Drivers --->
USB support --->
USB Gadget Support --->
< M > Support for USB Gadgets
USB Peripheral Controller (Freescale Highspeed
USB DR Peripheral Controller) --->
< M > Freescale Highspeed USB DR Peripheral Controller
Device Drivers --->
USB support --->
USB Gadget Support --->
< M > Support for USB Gadgets
USB Gadget Drivers
< M > Mass Storage Gadget
dts configuration:
usb@22000 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "fsl-usb2-<controller-type>-v<controller version>",
"fsl-usb2-<controller-type>";
reg = <0x22000 0x1000>; /* specifies register base addr, soc dependent */
interrupt-parent = <&mpic>;
interrupts = <28 0x2>; /* specifies usb interrupt line, soc dependent */
phy_type = "ulpi"; /* phy can be ulpi(external)/utmi(internal) */
dr_mode = "peripheral" /* this entry specifies usb mode */
};
u-boot:
For USB1 controller, to configure for gadget mode:
=> setenv hwconfig 'usb1:dr_mode=peripheral,phy_type=<ulpi/utmi>
In Linux:
1. Create a (e.g. 16MB) file backed storage as under on the target:
bash# dd bs=1M count=16 if=/dev/zero of=/root/bkup
16+0 records in
16+0 records out
2. Load device controller driver and test mass-storage gadget
a. Load FSL USB Gadget driver module
bash# insmod udc-core.ko
bash# insmod fsl_usb2_udc.ko
b. Load Mass storage module
bash# insmod configfs.ko
bash# insmod libcomposite.ko
bash# insmod usb_f_mass_storage.ko
bash# insmod g_mass_storage.ko file=/root/bkup
Number of LUNs=8
Mass Storage Function, version: 2009/09/11
LUN: removable file: (no medium)
Number of LUNs=1
LUN: file: /root/bkup
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
3. Connect a USB cable between USB port of target board and the USB port on Windows machine(host). The following
message pops up on the target. At the same time XP recognizes the USB storage device and Windows configures and
installs its driver.
bash# g_mass_storage gadget: high-speed config #1: Linux File-Backed Storage
Have a great day,
TIC
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