[U-Boot] U-boot: Beagle board as a USB Mass Storage Device Class

[Gupta, Ajay Kumar]

Hi
> Thanks for your response. I want to tell few more things about our
> implementation.
> 
> Actually we are planning to simulate (but not implement) the file system
> and implement the SCSI transparent command set decoder. When ever a file
> is sent to the USB mass storage device, we will be taking the content of
> that file to use for our application. The actual application does not
> require all the features of a Mass Storage Device; we just want it to look
> like a Mass Storage Device for transferring the data in the form of a file
> and for some other usage.

You can also use USB DFU for this where you can transfer files to RAM or
NAND partitions. DFU is not yet supported in Denx's uboot tree but is
Available in openmoko's tree
[http://git.openmoko.org/?p=u-boot.git;a=summary].
You will have to port back DFU feature from openmoko to Denx's tree.

-Ajay
> 
> Because of some constraints, we have to implement all this stuff at u-boot
> level, instead of doing it in OS(Linux) level.
> 
> Regards,
> Yogesh
> 
> --- On Tue, 6/8/10, Wolfgang Denk <wd at denx.de> wrote:
> 
> From: Wolfgang Denk <wd at denx.de>
> Subject: Re: [U-Boot] U-boot: Beagle board as a USB Mass Storage Device
> Class
> To: "yogesh b" <b_yogesh_snowy at yahoo.com>
> Cc: u-boot at lists.denx.de
> Date: Tuesday, June 8, 2010, 12:51 PM
> 
> Dear yogesh b,
> 
> In message <458375.64426.qm at web38807.mail.mud.yahoo.com> you wrote:
> >
> > I want to make the Beagle board (with u-boot) to look like a USB Mass
> > Storage Device when it is connected to the host PC. Can anyone
> > suggest regarding the files that I need to update in u-boot code, to
> > make the Beagle board look like a USB Mass Storage Device.
> 
> You don't need to and should not change anything in U-Boot. All it
> takes to do what you want is a two stage boot procedure. In the first
> step, boot Linux.
> 
> 
> Keep in mind that U-Boot is a boot loader, not an operating system.
> Fancy stuff should be done where the enviornment is available for it,
> i. e. in an operating system.
> 
> 
> [Note: even if you implement Device Mode support as an USB Mass
> Storage Device in U-Boot that would be just the first step - you
> would then most probably need write support for the file system(s)
> of your choice, and ... and ...]
> 
> Best regards,
> 
> Wolfgang Denk
> 
> --
> DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
> HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
> Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
> Every program has at least one bug and can be shortened by  at  least
> one instruction - from which, by induction, one can deduce that every
> program can be reduced to one instruction which doesn't work.
> 
> 
> 
>