[U-Boot-Users] Reset doesn't work on the 440EP Bamboo reference board
Stefan Roese
sr at denx.de
Tue Sep 13 08:45:34 CEST 2005
Hi Youngchul,
On Tuesday 13 September 2005 06:30, Youngchul Bang wrote:
> I have been trying to get U-Boot and Linux running on the AMCC 440EP
> "Bamboo" reference board. Most U-Boot commands are working. However,
> I've got problems about reset command and switch.
I just checked this problem with our bamboo board and a current U-Boot
version: No problem here:
Hit any key to stop autoboot: 0
=> reset
U-Boot 1.1.4 (Aug 24 2005 - 11:12:52)
AMCC PowerPC 440EP Rev. B
Board: Bamboo - AMCC PPC440EP Evaluation Board
VCO: 800 MHz
CPU: 400 MHz
PLB: 100 MHz
OPB: 50 MHz
EPB: 25 MHz
I2C: ready
DRAM: 192 MB
FLASH: 5 MB
PCI: Bus Dev VenId DevId Class Int
In: serial
Out: serial
Err: serial
NAND: 64 MB
Type "run flash_nfs" to mount root filesystem over NFS
Hit any key to stop autoboot: 0
> First, reset command does not work except after cp.b command performed
> (i.e. cp.b 100000 fff80000 80000). I don't know why it works well
> after cp.b command. Reboot command in Linux doesn't work neither.
> U-Boot version is 1.1.3 and Linux kernel is 2.6.13. Is it related to
> the same reason?
Hmmm. U-Boot version 1.1.3 covers over 1/2 year of code versions. Please use
the current version (top cvs) and give it a nother try. As you may have
noticed, the AMCC 4xx boards have received a major cleanup in the last weeks.
> Second, the reset switch does not work. I've been confirmed that
> SYSTEM_RESET line is getting pulled down when I push the reset switch.
Do I understand this right: You push the reset button, and the board does not
reset! Strange.
> When I try to get PIBS instead of U-Boot on the same board, the above
> problems haven't happened.
>
> Had the problems been discussed before in this list? I can't find any
> of conversations about them. If so, give me the url please.
No.
> Let me know how to fix them up.
See above. Try the current version and let me know, if the problem still
occurs.
Another question: Do you have a debugger connected while resetting the board?
Best regards,
Stefan
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