[U-Boot-Users] AT91SAM9261-EK USB storage not working...

[U-Boot-Users] AT91SAM9261-EK USB storage not working...

[Remy Bohmer]

Hello Stelian,

Thank you for adding support for the Atmel AT91SAM9261-EK to U-boot.

But I have a question here:
Does USB-storage devices work in U-boot at your place? (e.g. 1GB USB
memory stick)
I use U-boot 1.3.4-rc1

I first ran into this problem on our custom board from which I derived
the BSP from your patchset, but I noticed that it does not seem to
work either on the AT91SAM9261-EK kit.
So, I am curious if I broke something, or if something else
fundamental is wrong here...

When I do a usb scan, It recognises 2 devices, but when it starts
looking for usb-storage devices, it takes a while, and finally it ends
up with this error:
----------------------------------------
Device NOT ready
    Request Sense returned 0 0 0
----------------------------------------

Kind Regards,

Remy

[U-Boot-Users] AT91SAM9261-EK USB storage not working...

[Stelian Pop]

Le samedi 26 juillet 2008 ? 00:22 +0200, Remy Bohmer a ?crit :
> Hello Stelian,

Hi R?my,

> 
> Thank you for adding support for the Atmel AT91SAM9261-EK to U-boot.
> 
> But I have a question here:
> Does USB-storage devices work in U-boot at your place? (e.g. 1GB USB
> memory stick)
> I use U-boot 1.3.4-rc1
[...]

You're correct, USB support on the AT91SAM9 boards has some unknown
issues. I can reproduce the behaviour you're seing easily here.

Nicolas Ferre (added in CC:) confirmed the problem too (with both the
current U-Boot version and the atmel specific 1.1.5-atmel_1.5 version).
But he is very certain that it did work at some time in the past, with
some USB storage devices.

So it may be a matter of hardware (lo or hi-speed USB storage
devices ?), or a matter of timing somewhere in the driver, I do not
know. The Linux USB stack works perfectly, so this is not a hardware
problem on the AT91SAM9 chip or board.

Somebody needs to debug this, but I didn't found the time to investigate
yet. If you badly need it to work, well, you're welcome to try debugging
it :)

Thanks,

-- 
Stelian Pop <stelian@popies.net>

[U-Boot-Users] AT91SAM9261-EK USB storage not working...

[Remy Bohmer]

Hello Stelian,

> You're correct, USB support on the AT91SAM9 boards has some unknown
> issues. I can reproduce the behaviour you're seing easily here.

That is at least some good news. It confirms that I did not introduce
this problem myself :-)

> Nicolas Ferre (added in CC:) confirmed the problem too (with both the
> current U-Boot version and the atmel specific 1.1.5-atmel_1.5 version).
> But he is very certain that it did work at some time in the past, with
> some USB storage devices.

I am very certain that it worked on 1.1.5_atmel_1.4 version, with
exactly the same USB memory stick as the one that does not work on
thecurrent releases...
So, I can rule the USB stick as well...

> So it may be a matter of hardware (lo or hi-speed USB storage
> devices ?), or a matter of timing somewhere in the driver, I do not
> know. The Linux USB stack works perfectly, so this is not a hardware
> problem on the AT91SAM9 chip or board.

I agree

> Somebody needs to debug this, but I didn't found the time to investigate
> yet. If you badly need it to work, well, you're welcome to try debugging
> it :)

I hoped someone already had a solution, that why I asked you ;-)
and yes, it _must_ work here, and I believe I have to dig in this
myself. Maybe next week...

Kind regards,

Remy

[U-Boot-Users] AT91SAM9261-EK USB storage not working...

[Stelian Pop]

Le lundi 28 juillet 2008 ? 12:59 +0200, Remy Bohmer a ?crit :

> I am very certain that it worked on 1.1.5_atmel_1.4 version, with
> exactly the same USB memory stick as the one that does not work on
> thecurrent releases...
> So, I can rule the USB stick as well...

This makes you a good test configuration.

[...]

> I hoped someone already had a solution, that why I asked you ;-)
> and yes, it _must_ work here, and I believe I have to dig in this
> myself. Maybe next week...

Good luck, I am waiting for your patch then :)

-- 
Stelian Pop <stelian@popies.net>

[U-Boot-Users] AT91SAM9261-EK USB storage not working...

[Remy Bohmer]

Hello Stelian and others,

I have made some progress here, and I would like to inform you all:

>> But I have a question here:
>> Does USB-storage devices work in U-boot at your place? (e.g. 1GB USB
>> memory stick) I use U-boot 1.3.4-rc1
> You're correct, USB support on the AT91SAM9 boards has some unknown
> issues. I can reproduce the behaviour you're seing easily here.
> Nicolas Ferre (added in CC:) confirmed the problem too (with both the
> current U-Boot version and the atmel specific 1.1.5-atmel_1.5 version).
> But he is very certain that it did work at some time in the past, with
> some USB storage devices.

I have done a lot of debugging/testing etc. and I noticed that binary
deliverables of U-boot for the evaluationkit work properly with
USB-storage devices on the AT91SAM9261-EK kit.
They were all based on U-boot 1.1.3, 1.1.4, 1.1.5 Atmel versions.

But, I was not able to get a working version when I build such a code
tree myself. I use gcc version 4.2.3 (Sourcery G++ Lite 2008q1-126)
An hour ago I got the stupid idea to get an older compiler: gcc
version 3.4.2 (release) (CodeSourcery ARM Q3D 2004)

And this one delivers a working usb-ohci in u-boot.bin :-))

Even u-boot-1.3.4-rc1 now works with USB-storage devices on these
at91sam9261 cores.
I also tried GCC 4.1.0, but that one delivered also a broken binary
Compiling without optimisation (-Os) resulted in a binary that did not
boot at all... (not debugged yet why)

So, with GCC 4.2.3 everything in U-boot seems to work, except the
USB-OHCI driver...
For the USB-OHCI driver we apparantly need a GCC 3.xx compiler.

Now, we need to debug why GCC 4.x is a problem...

Kind Regards,

Remy

> So it may be a matter of hardware (lo or hi-speed USB storage
> devices ?), or a matter of timing somewhere in the driver, I do not
> know. The Linux USB stack works perfectly, so this is not a hardware
> problem on the AT91SAM9 chip or board.

> Somebody needs to debug this, but I didn't found the time to investigate
> yet. If you badly need it to work, well, you're welcome to try debugging
> it :)
>

[U-Boot-Users] AT91SAM9261-EK USB storage not working...

[Stelian Pop]

Hi Remy,

Le jeudi 31 juillet 2008 ? 15:24 +0200, Remy Bohmer a ?crit :
> Hello Stelian and others,
> 
> I have made some progress here, and I would like to inform you all:
[...]

> I have done a lot of debugging/testing etc. and I noticed that binary
> deliverables of U-boot for the evaluationkit work properly with
> USB-storage devices on the AT91SAM9261-EK kit.
> They were all based on U-boot 1.1.3, 1.1.4, 1.1.5 Atmel versions.
> 
> But, I was not able to get a working version when I build such a code
> tree myself. I use gcc version 4.2.3 (Sourcery G++ Lite 2008q1-126)
> An hour ago I got the stupid idea to get an older compiler: gcc
> version 3.4.2 (release) (CodeSourcery ARM Q3D 2004)

FYI, I have been using a CS toolchain here too (2007q3) and had
optimisation problems with it (net/net.c:NetReceive() gets miscompiled
when using -Os, but behaves correctly when compiled with -O2).

I didn't have any problems with the (older) ELDK 4.1 gcc compiler. Maybe
you should try it first.

-- 
Stelian Pop <stelian@popies.net>