-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 moinmoin
there is no "must" for using /dev/mmc* .. you could also use a plain file: preparations: create mem_stick.fs file dd if=/dev/zero of=mem_stick.fs bs=512 count=1048576 # for a 512mb "memory-stick" with blocksize=512 bytes create filesystem on mem_stick.fs: mkfs.ext3 mem_stick.fs from FR you can mount this filesystem with: mount -o loop mem_stick.fs some_mount_point and for exporting via usb: rmmod g_ether # if mount -> umount! modprobe g_file_storage file=mem_stick.fs regards, morlac Am 05.09.2008 um 13:04 schrieb pHilipp Zabel: > On Fri, Sep 5, 2008 at 4:41 AM, Dale Maggee > <[EMAIL PROTECTED]> wrote: >> Petr Vanek wrote: >>> I have spent a while googling this up and have no wiki skills but >>> someone might find this useful: >>> >>> to make FR act as a memory stick, here is what my script does: >>> >>> >>> #!/bin/sh >>> /etc/init.d/networking stop >>> rmmod g_ether >>> modprobe g_file_storage file=/dev/mmcblk0p1 >>> >>> -- >>> Petr Vaněk >>> http://biodynamika.cz >>> >> very cool, but before I test it out (potentially breaking my usb >> networking in the process), I have a couple of questions: >> >> 1. will this persist over a reboot, or will it revert back to >> being an >> ethernet gadget when I reboot? > > It's not persistent unless you add something like this to the init > scripts. After rebooting the ethernet gadget will be back. > >> 2. is the following sufficient to switch it back? >> >> #!/bin/sh >> rmmod g_file_storage >> modprobe g_ether >> ifup usb0 >> >> (assuming I replaced '/etc/init.d/networking stop' with 'ifdown >> usb0' as >> recommended by Daniel) >> >> 3. can somebody point me to a resource for the g_file_storage module >> where I can learn more about it? I did a couple of quick googles but >> didn't see anything promising. specifically I'd like to know more >> about >> the file parameter - I assume that in this scenario our "usb >> stick" is >> using partition/device information from /dev/mmcblk0p1, and will be >> partitioned in the same way as the SD card? what If I wanted to >> have my >> home directory accessible in "usb stick" mode? > > I suggest to read the comment in the source code, it's quite detailed: > http://git.kernel.org/?p=linux/kernel/git/torvalds/ > linux-2.6.git;a=blob;f=drivers/usb/gadget/file_storage.c;hb=HEAD > > The file parameter determines the raw backing store for the storage > device, so if you > have file=/dev/mmcblk0p1, its contents will directly appear as > /dev/sdx on the host. As mmcblk0p1 doesn't contain a partition table, > so won't sdx. If you want to export the whole device, use > file=/dev/mmcblk0, you'll get the partition table in /dev/sdx and the > kernel will parse it and create /dev/sdx1 (containing the contents of > /dev/mmcblk0p1) etc. > > The host has direct access to the block device, so it is important > that /dev/mmcblk0p1 is not mounted on both the phone and the host at > the same time (unless it's mounted ro on both). > > regards > Philipp > _______________________________________________ > Openmoko community mailing list > [email protected] > http://lists.openmoko.org/mailman/listinfo/community > -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (Darwin) iD8DBQFIwStgr81gVylJyzERAmHbAJwLiBalMaLkhe3p4//QQkgBs7PLfgCeOfMR lsdWNYAG4g3mTT0Mo2KEyek= =Vdg5 -----END PGP SIGNATURE----- _______________________________________________ Openmoko community mailing list [email protected] http://lists.openmoko.org/mailman/listinfo/community
