파일 : E:\ghcstop\AESOP_ghcstop_doc\usb_gadget\S3C2410_S3C2440_2.6.13_usb_gadget_howto.txt , 2:30:10 오후

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1 linux kernel usb le-storage gadget howto godori<ghcstop@gmail.com> usb_gadget_1.txt 파일을수정한것이다. 참고할것. * usb le-storage gadget 이란 usb device 를가지고있는 cpu 혹은장비의 usb device를이용하여 usb host 에연결하여 mass storage 형태로사용할수있도록만든것이다. * usb device controller 의기능을구현하게되면, 그위에 le-storage gadget, usb ethernet gadget 등을올려서 usb device 를 mass storage, usb ethernet(windows 쪽에서는 RNDIS driver 이용) 으로사용할수있다. * 현재는 usb mass storage 로만테스트해봤으나, usb ethernet 도같은드라이버이므로큰상관이없을거라고보여진다. 내 pc 가 windows 2000 이라 RNDIS driver 설치도귀찮아서... 그냥테스트는안했음...^^( windows XP 의경우 linux.inf 라는 driver 정보파일만있으면바로등록이가능하다.) 가. host 에서의작업(root lesystem 디렉토리서작업을해야한다. 1. backing_le 만들기(64M 짜리) 32M 짜리일경우는 dd 명령을내릴때 count 를 32 로 fdisk 시실린더를 512로 root lesystem root 디렉토리가 /scratchbox/users/aesop/targets/aesop 일경우 cd /scratchbox/users/aesop/targets/aesop/root mkdir data cd data dd bs=1m count=64 if=/dev/zero of=./backing_le fdisk./backing_le 여기서부터는 fdisk 명령이다. 좀어렵기는하나그냥쳐보면별로어렵지는않다. - 파티션을확인한다. 당연히암것도없겠지요. Command (m for help): x Expert command (m for help): s Number of sectors (1-63, default 63): 8 Warning: setting sector offset for DOS compatiblity Expert command (m for help): h Number of heads (1-256, default 255): 16 Expert command (m for help): c Number of cylinders ( ): 1024 Expert command (m for help): r - 다시확인을한다. 16 heads, 8 sectors/track, 1024 cylinders Units = cylinders of 128 * 512 = bytes Command (m for help): n Command action e extended p primary partition (1-4) p Partition number (1-4): 1 - 여기서는그냥엔터를친다. First cylinder (1-1024, default 1): Using default value 1 - 여기서도그냥엔터를친다. Last cylinder or +size or +sizem or +sizek (1-1024, default 1024): Using default value 1024 페이지 : 1

2 Command (m for help): t Selected partition 1 Hex code (type L to list codes): L 0 Empty 1c Hidden W95 FAT3 70 DiskSecure Mult bb Boot Wizard hid 1 FAT12 1e Hidden W95 FAT1 75 PC/IX be Solaris boot 2 XENIX root 24 NEC DOS 80 Old Minix c1 DRDOS/sec (FAT- 3 XENIX usr 39 Plan 9 81 Minix / old Lin c4 DRDOS/sec (FAT- 4 FAT16 <32M 3c PartitionMagic 82 Linux swap c6 DRDOS/sec (FAT- 5 Extended 40 Venix Linux c7 Syrinx 6 FAT16 41 PPC PReP Boot 84 OS/2 hidden C: da Non-FS data 7 HPFS/NTFS 42 SFS 85 Linux extended db CP/M / CTOS /. 8 AIX 4d QNX4.x 86 NTFS volume set de Dell Utility 9 AIX bootable 4e QNX4.x 2nd part 87 NTFS volume set df BootIt a OS/2 Boot Manag 4f QNX4.x 3rd part 8e Linux LVM e1 DOS access b W95 FAT32 50 OnTrack DM 93 Amoeba e3 DOS R/O c W95 FAT32 (LBA) 51 OnTrack DM6 Aux 94 Amoeba BBT e4 SpeedStor e W95 FAT16 (LBA) 52 CP/M 9f BSD/OS eb BeOS fs f W95 Ext'd (LBA) 53 OnTrack DM6 Aux a0 IBM Thinkpad hi ee EFI GPT 10 OPUS 54 OnTrackDM6 a5 FreeBSD ef EFI (FAT-12/16/ 11 Hidden FAT12 55 EZ-Drive a6 OpenBSD f0 Linux/PA-RISC b 12 Compaq diagnost 56 Golden Bow a7 NeXTSTEP f1 SpeedStor 14 Hidden FAT16 <3 5c Priam Edisk a8 Darwin UFS f4 SpeedStor 16 Hidden FAT16 61 SpeedStor a9 NetBSD f2 DOS secondary 17 Hidden HPFS/NTF 63 GNU HURD or Sys ab Darwin boot fd Linux raid auto 18 AST SmartSleep 64 Novell Netware b7 BSDI fs fe LANstep 1b Hidden W95 FAT3 65 Novell Netware b8 BSDI swap ff BBT Hex code (type L to list codes): b Changed system type of partition 1 to b (W95 FAT32) 16 heads, 8 sectors/track, 1024 cylinders Units = cylinders of 128 * 512 = bytes./backing_le b W95 FAT32 Command (m for help): w The partition table has been altered! Calling ioctl() to re-read partition table. WARNING: Re-reading the partition table failed with error 25: Inappropriate ioctl for device. The kernel still uses the old table. The new table will be used at the next reboot. WARNING: If you have created or modied any DOS 6.x partitions, please see the fdisk manual page for additional information. Syncing disks. [root@aesopdev data]# ls -al total drwxr-xr-x 2 root root 4096 Oct 21 18:06. drwxrwxr-x 5 root root 4096 Oct 21 18:04.. -rw-r--r-- 1 root root Oct 21 18:09 backing_le [root@aesopdev data]# fdisk -lu./backing_le You must set cylinders. You can do this from the extra functions menu. 16 heads, 8 sectors/track, 0 cylinders, total 0 sectors Units = sectors of 1 * 512 = 512 bytes./backing_le b W95 FAT32 나. dosfsutil 을설치한다. 페이지 : 2

3 - 여기서는 cross compile 을하였다. scratchbox 의경우는바꿀필요없이 native 방식으로컴파일하면된다. - dosfstools-2.10.tar.gz 을받아와서압축을푼다. - Makele 을다음과같이고친다. # # Makele for dosfstools (mkdosfs and dosfsck) # CC = arm-linux-gcc CPP = $(CC) -E OPTFLAGS = -O2 -fomit-frame-pointer WARNFLAGS = -Wall DEBUGFLAGS = CFLAGS = $(OPTFLAGS) $(WARNFLAGS) $(DEBUGFLAGS) LDFLAGS = PREFIX = /scratchbox/users/aesop/targets/aesop SBINDIR = $(PREFIX)/sbin MANDIR = $(PREFIX)/usr/man/man8.PHONY: clean distclean install depend.export_all_variables: all dep clean install: $(MAKE) -C mkdosfs $@ $(MAKE) -C dosfsck $@ distclean: $(MAKE) -C mkdosfs $@ $(MAKE) -C dosfsck $@ rm -f TAGS.#*.new* \#*# *~ TAGS: etags -d -T `nd. -name '*.[ch]'` dist: binary tar tar: distclean cd..; \ mv $$name $$namev; \ tar cf $$namev.src.tar `nd $$namev \( -name CVS -o -path $$namev/debian \) -prune -o! -type d -print`; \ gzip -9f $$namev.src.tar; \ mv $$namev $$name binary: all doit=""; [ root = "`whoami`" ] doit=sudo; $$doit $(MAKE) binary-sub cd tmp; \ arch=`uname -m sed 's/i.86/i386/'`; \ nameva=$$namev.$$arch.tar; \ tar cf../../$$nameva * ; \ gzip -9f../../$$nameva doit=""; [ root = "`whoami`" ] doit=sudo; $$doit rm -rf tmp root = "`whoami`" ] (echo "Must be root for this!"; exit 1) mkdir -p tmp/$(sbindir) tmp/$(mandir) $(MAKE) install PREFIX=$(shell pwd)/tmp # usage: make diff OLDVER=<last-release-number> [ "x$(oldver)" = "x" ]; then \ echo "Usage: make diff OLDVER=<last-release-number>"; \ ; \ cvs diff -u -rrelease-$(oldver) >../$$namev.diff; \ gzip -9f../$$namev.diff 페이지 : 3

4 # usage: make release VER=<release-number> [ "x$(ver)" = "x" ]; then \ echo "Usage: make release VER=<release-number>"; \ if [ -d CVS ]; then \ modied=`cvs status 2>/dev/null awk '/Status:/ { if ($$4!= "Up-to-date") print $$2 }'`; \ if [ "x$$modied"!= "x" ]; then \ echo "There are modied les: $$modied"; \ echo "Commit rst"; \ ; \ sed "/VERSION/s/\".*\"/\"$(VER)\"/" <version.h >version.h.tmp date="`date +'%d %b %Y'`"; sed "/VERSION_DATE/s/\".*\"/\"$$date\"/" <version.h.tmp >version.h rm version.h.tmp if [ -d CVS ]; then \ cvs commit -m"raised version to $(VER)" version.h; \ cvs tag -c -F RELEASE-`echo $(VER) sed 's/\./-/g'`; \ - make - make install 다. target board에서 // 앞의 4K 의경우는아마도완충용인것같음... 쩝 Ignore the bogus data at the top and concentrate on the table at the bottom. The number you want is the value in the "Start" column. It gives the offset in sectors; to convert to bytes you must multiply by 512. So we see that the offset is 8 x 512 = 4096 bytes. You use the losetup program to set up the loop device driver with the proper offset: 이세개의명령을가지고제대로파일이 dos 형태의 image le 인지검사를한다. - /dev/loop/0 와 dos lesystem 으로 fdisk 되어있는이미지파일을연결한다. # losetup -o 4096 /dev/loop/0 /root/data/backing_le - dosfs 로포맷한다. # mkdosfs /dev/loop/0 - 마운트해본다. # mount -t vfat /dev/loop/0 /mnt/gadget Now you can transfer les back and forth to your heart's content! When you're done, be sure to unmount and detach the loop device: - 확인해본다. # cd /mnt/gadget # ls -al * - unmount 를한다. # umount /dev/loop/0 - loopback device 와 backing_le 과의연결을뗀다. 뭐, ioctl 에러가난다. 원래 umount 하면자동으로떼어지는듯 #losetup -d /dev/loop/0 여기까지는테스트완료 라. 보드재부팅후 gadget 테스트 페이지 : 4

5 타겟보드에서 insmod g_le_storage le=/root/data/backing_le 이렇게한후 pc 랑연결한다. 연결을하게되면 pc 에서 usb mass storage 로인식한다. 데이터를복사한후( 단, 만든 backing_le 용량보다작게넣어야겠지용) windows 에서 usb 의연결을해제한다. 다시타겟보드에서 losetup -o 4096 /dev/loop/0 /root/data/backing_le mount -t vfat /dev/loop/0 /mnt 이렇게해서확인해보면(ls -al 로) 윈도우즈에서넘긴파일들이넘어가있는것을볼수있다. umount 를하면 losetup -o 했던것도없어진다. 즉, 다시마운트하려면 losetup 을다시해줘야한다. 한꺼번에 losetup -o 4096 /dev/loop/0 /root/data/backing_le;mount -t vfat /dev/loop/0 /mnt 페이지 : 5