1.insmod USB Host Driver
insmod /lib/modules/2.6.28.4-as353x-patch-svn1406/kernel/drivers/usb/gadget/dwc_otg/dwc_otg.ko
dwc_otg: version 2.60a 05-JUN-2009
AHBValid bit set to 4 after 0 msec
AHBValid bit set to 4 after 1 msec
Connected
dwc_otg: Detected: Synopsys DWC OTG 2.60a Core
dwc_otg: Dedicated Tx FIFOs mode
2.insmod USB Gadget FS driver
# insmod /lib/modules/2.6.28.4-as353x-patch-svn1406/kernel/drivers/usb/gadget/gadgetfs.ko
gadgetfs: USB Gadget filesystem, version 24 Aug 2004
3.insmod a kind of USB Gadget driver, here use "File-backed Storage Gadget"
when insmod this driver, should pass a file/device and some patameter to the driver
here use the mmc block device :
follow is the SD card info:
when insert SD card:
# mmc0: new high speed SD card at address b368
mmcblk0: mmc0:b368 UD 952 MiB
mmcblk0: unknown partition table
then see block partitions info:
# cat /proc/partitions
major minor #blocks name
179 0 975360 mmcblk0
179 1 4096 mmcblk0p1
179 2 126976 mmcblk0p2
179 3 843792 mmcblk0p3
179 4 496 mmcblk0p4
then do:
# insmod /lib/modules/2.6.28.4-as353x-patch-svn1406/kernel/drivers/usb/gadget/g_file_storage.ko file=/dev/mmcblk0p3 stall=0 removable=1
g_file_storage gadget: File-backed Storage Gadget, version: 7 August 2007
g_file_storage gadget: Number of LUNs=1
g_file_storage gadget-lun0: ro=0, file: /dev/mmcblk0p3
Also, if you use other file or nand flash, you can use something like /dev/mmcblock3 instead of /dev/mmcblk0p3.
如果不指定file参数，是无法正常insmod的，因为，USB的文件存储，必须要有对应的设备（文件）去操作，不可能凭空去支持USB的操作的。
4.after above operations, we can connect USB
will show info like this:
# dwc_otg: SRP: Device mode
dwc_otg: USB RESET
dwc_otg:
CANNOT handle > 1 setup packet in DMA mode
dwc_otg: USB RESET
dwc_otg:
# dwc_otg: SRP: Device mode
dwc_otg: USB RESET
dwc_otg:
CANNOT handle > 1 setup packet in DMA mode
dwc_otg: USB RESET
dwc_otg:
CANNOT handle > 1 setup packet in DMA mode
dwc_otg: req 80.06 protocol STALL; err -22
dwc_otg: USB RESET
dwc_otg:
…..
and in PC, will show the USB Mass Storage disk..
【参考资料】
1.usb gadget mass storage 驱动开发
http://topic.csdn.net/u/20080925/20/585af370-9e59-4ef2-b162-3641574c5477.html
2.Linux-USB Gadget : Part 2: USB Gadget API for Linux (From Linux kernel 2.6.25.10)
http://blog.csdn.net/hongjiujing/archive/2009/09/01/4508105.aspx
转载请注明：在路上 » 在Linux USB Gadget下使用U盘