[U-Boot-Users] Problems with tftp-transfers on u-boot (with Linux ok)

[U-Boot-Users] Problems with tftp-transfers on u-boot (with Linux ok)

[Roesli, Patrick]

Dear u-boot community,

First of all, thank you very much for this great bootloader!

From time to time we have some problems on the ethernet-communication at
the bootloader level. When we are trying to download an image via tftp,
the communication isn't running fluently, there are some interruptions
as
we can see with ethereal, or even the communication isn't running at
all.
These problems do not occure on every hardware and may be caused by some
chip/hardware tolerances.
On the other side, after starting the Linux-Kernel and running tftp in 
userspace there is no problem anymore.

We haven't found any related changes on the source since the u-boot
1.0.2. 
Had anbody similar effects on the ethernet-communication or any idea how
we
could solve the problem?

Kind regards
Patrick Roesli

software components:
- u-boot 1.0.2 (denx-tree) U-Boot-1_0_2
- kernel 2.4 (denx-tree linuxppc_2_4_devel) LABEL_2005_06_20_1300

hardware components(NSCU Board):
- Freescale MPC855TVR66D4(66Mhz) on a TQ systems TQM855-AC(32MB
SDRAM/16MB flash)
- Ethernet Controller LXT971A
http://developer.intel.com/design/network/products/LAN/applnots/24940101
.pdf (single port)

[U-Boot-Users] Problems with tftp-transfers on u-boot (with Linux ok)

[Clemens Koller]

Hi, Patrick!

Roesli, Patrick schrieb:
From time to time we have some problems on the ethernet-communication at
> the bootloader level. When we are trying to download an image via tftp,
> the communication isn't running fluently, there are some interruptions
> as
> we can see with ethereal, or even the communication isn't running at
> all.
> These problems do not occure on every hardware and may be caused by some
> chip/hardware tolerances.

Did you evaluate the dependencies of the tolerances already?
(varying temperatures, voltages, speed, cable length, ...)

> On the other side, after starting the Linux-Kernel and running tftp in 
> userspace there is no problem anymore.

Mhm... an U-Boot update seems to be appropriate in that case.

> We haven't found any related changes on the source since the u-boot
> 1.0.2. 
> Had anbody similar effects on the ethernet-communication or any idea how
> we
> could solve the problem?
> 
> Kind regards
> Patrick Roesli
> 
> software components:
> - u-boot 1.0.2 (denx-tree) U-Boot-1_0_2
> - kernel 2.4 (denx-tree linuxppc_2_4_devel) LABEL_2005_06_20_1300

That's all old stuff, nobody wants to talk about.
Can you try the latest U-Boot git tree, please?

> hardware components(NSCU Board):
> - Freescale MPC855TVR66D4(66Mhz) on a TQ systems TQM855-AC(32MB
> SDRAM/16MB flash)
> - Ethernet Controller LXT971A
> http://developer.intel.com/design/network/products/LAN/applnots/24940101
> .pdf (single port)

I have the LXT971A working fine on one of my MPC8540 boards.
(Running some u-boot-1.2.0-git)
Please verify the hardware setup of the PHY if applicable.
(configuration, autonegotiation, ...)

Regards,
-- 
Clemens Koller
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