[U-Boot-Users] Preliminary patch for Cogent CBS336 (MC9328MXL-based)

[U-Boot-Users] Preliminary patch for Cogent CBS336 (MC9328MXL-based)

[llandre]

Starting from Bryan Larsen's patch for U-Boot 0.4.0, I started porting 
U-Boot 1.1.2 on Cogent CSB336.
The patch against current CVS is available for download here 
http://www.dave-tech.it/download/misc/up-csb336-1 (I could not attach 
because the size limit). Some clean ups are needed here and there.
I had to change the routine reset_timer_masked in cpu/mc9328/interrupts.c 
(bug?).
To initialize clocks and SDRAM controller I used the same values used by 
the Micromonitor bootloader the board comes with.
I also had to avoid invoking funtion SetAsynchMode() otherwise the 
processor hangs.

U-Boot seems to be stable but I could not load Linux kernel so far. I'm 
trying to start a modified version of the kernel 0.3.8 delivered by 
Motorola for the M9328MXL ADS. It seems the kernel does not like the 
parameters passed by U-Boot. Still working on it. Any advice or suggestion 
is appreciated.


Regards,

llandre

DAVE Electronics System House - R&D Department
www.dave-tech.it 

[U-Boot-Users] Preliminary patch for Cogent CBS336 (MC9328MXL-based)

[Steven Scholz]

> U-Boot seems to be stable but I could not load Linux kernel so far. I'm 
> trying to start a modified version of the kernel 0.3.8 delivered by 
> Motorola for the M9328MXL ADS. It seems the kernel does not like the 
> parameters passed by U-Boot. Still working on it. Any advice or 
> suggestion is appreciated.

Use linux 2.6.7 with the i.MX patch from pengutronix. This works fine.

http://www.pengutronix.de/software/linux-i.MX/v2.6/

BTW: Sascha Hauer already posted a patch for the i.MX! It's still in 
Wolfgang's queue. Have a look at

http://www.pengutronix.de/software/u-boot/u-boot-imx1-20040628-1.diff

Steven

[U-Boot-Users] Preliminary patch for Cogent CBS336 (MC9328MXL-based)

[llandre]

Hi Steven,

thanks a lot for your support. I tried to run the patched 2.6.7 kernel but 
it seems it hangs after decompression (don't see further messages):

Bytes transferred = 753884 (b80dc hex)
## Booting image at 08800000 ...
    Image Name:   Linux-2.6.7-imx3
    Image Type:   ARM Linux Kernel Image (uncompressed)
    Data Size:    753820 Bytes = 736.2 kB
    Load Address: 08008000
    Entry Point:  08008000
    Verifying Checksum ... OK
OK
## Loading Ramdisk Image at 10240000 ...
    Image Name:   B2EVB romfs
    Image Type:   ARM Linux RAMDisk Image (gzip compressed)
    Data Size:    442554 Bytes = 432.2 kB
    Load Address: 0c400000
    Entry Point:  0c400000
    Verifying Checksum ... OK
## Transferring control to Linux (at address 08008000) ...

Starting kernel ...

Uncompressing Linux..................................................... 
done, booting the kernel.



I'll perform further investigations. In case it actually won't work, I'll 
patch U-Boot with Sascha's latest patch and I'll try again.



Regards,
llandre

DAVE Electronics System House - R&D Department
www.dave-tech.it




>>U-Boot seems to be stable but I could not load Linux kernel so far. I'm 
>>trying to start a modified version of the kernel 0.3.8 delivered by 
>>Motorola for the M9328MXL ADS. It seems the kernel does not like the 
>>parameters passed by U-Boot. Still working on it. Any advice or 
>>suggestion is appreciated.
>
>Use linux 2.6.7 with the i.MX patch from pengutronix. This works fine.
>
>http://www.pengutronix.de/software/linux-i.MX/v2.6/
>
>BTW: Sascha Hauer already posted a patch for the i.MX! It's still in 
>Wolfgang's queue. Have a look at
>
>http://www.pengutronix.de/software/u-boot/u-boot-imx1-20040628-1.diff
>
>Steven

[U-Boot-Users] Preliminary patch for Cogent CBS336 (MC9328MXL-based)

[Steven Scholz]

Hi llandre,

> thanks a lot for your support. I tried to run the patched 2.6.7 kernel 
> but it seems it hangs after decompression (don't see further messages):
> ...
> ## Transferring control to Linux (at address 08008000) ...
> 
> Starting kernel ...
> 
> Uncompressing Linux..................................................... 
> done, booting the kernel.

I bet it does not hang. It's probably just the wrong settings for serial 
console!

Steven

[U-Boot-Users] Preliminary patch for Cogent CBS336 (MC9328MXL-based)

[llandre]

>>thanks a lot for your support. I tried to run the patched 2.6.7 kernel 
>>but it seems it hangs after decompression (don't see further messages):
>>...
>>## Transferring control to Linux (at address 08008000) ...
>>Starting kernel ...
>>Uncompressing Linux..................................................... 
>>done, booting the kernel.
>
>I bet it does not hang. It's probably just the wrong settings for serial 
>console!

Hi Steven,
I debugged the kernel startup. It hanged because the architecture number 
(508) did not match the sbc9328 ID. I temporarily changed it in U-Boot 
platform-specific file and the kernel completes the first stage. Now it 
hangs in console_init function when it tries to initialize the 8250 serial 
driver. Why is this driver enabled? Can I safely remove it from configuration?



Regards,

llandre

DAVE Electronics System House - R&D Department
www.dave-tech.it