[Buildroot] AT91SAM9G20 support?

[Buildroot] AT91SAM9G20 support?

[suffecool at comcast.net]

Hello,

Line 69 of target/device/Atmel/AT91_Config.in states that "Atmel AT91SAM9G20 ARM based systems" are not yet implemented.

How difficult is this to do?  I am willing to give it a shot if it simply involves creating/tweaking some configuration files.  We were using the 9260 dev board, but have recently switched to the newer 9G20 board.  However, when we push our 9260 kernel to the board and boot it with a 9G20-knowledgeable u-boot, it balks after uncompressing the kernel image with the following error:

Uncompressing Linux......................done, booting the kernel.
Error: unrecognized/unsupported machine ID (r1 = 0x00000658)
Available machine support:
ID (hex)     NAME
0000044b  Atmel AT91SAM9260-EK
Please check your kernel config and/or bootloader.

I initially thought this was a u-boot issue, but now I think it's just that buildroot does not yet know about 9G20 dev boards.

Any direction/assistance would be appreciated.

--Kevin S.
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[Buildroot] AT91SAM9G20 support?

[hartleys]

On Thursday, October 30, 2008 11:51 AM, suffecool at comcast.net wrote:
> Hello,
>  
> Line 69 of target/device/Atmel/AT91_Config.in states that
> "Atmel AT91SAM9G20 ARM based systems" are not yet implemented.
> 
> How difficult is this to do?  I am willing to give it a shot
> if it simply involves creating/tweaking some configuration files.
> We were using the 9260 dev board, but have recently switched to
> the newer 9G20 board.  However, when we push our 9260 kernel to
> the board and boot it with a 9G20-knowledgeable u-boot, it balks
> after uncompressing the kernel image with the following error:
> 
> Uncompressing Linux......................done, booting the kernel.
> Error: unrecognized/unsupported machine ID (r1 = 0x00000658)
> Available machine support:
> ID (hex)     NAME
> 0000044b  Atmel AT91SAM9260-EK
> Please check your kernel config and/or bootloader.
> 
> I initially thought this was a u-boot issue, but now I think it's
> just that buildroot does not yet know about 9G20 dev boards.
> 
> Any direction/assistance would be appreciated.

It appears the problem is actually in your kernel.

U-boot passed a machine ID of (r1 = 0x00000658), which according to
arch/arm/tools/mach-types is:

at91sam9g20ek		MACH_AT91SAM9G20EK	AT91SAM9G20EK
1624

But the linux kernel you are trying to bring up says that the only
machine supported is:

Available machine support:
ID (hex)     NAME
0000044b  Atmel AT91SAM9260-EK

[Buildroot] AT91SAM9G20 support?

[suffecool at comcast.net]

Yeah, that's what I am discovering.  I am now looking at various kernel releases to see if and when 9G20 support was added (if at all).

Google searching found this link:
http://lkml.org/lkml/2008/6/13/62

where it appears that somebody back in June 2008 did a lot of work patching the kernel to get the 9G20 to be supported.  I'm downloading the 2.6.27 kernel now to see if it was added  into that one.

--kev

-------------- Original message -------------- 
From: "hartleys" <hartleys@visionengravers.com> 

> On Thursday, October 30, 2008 11:51 AM, suffecool at comcast.net wrote: 
> > Hello, 
> > 
> > Line 69 of target/device/Atmel/AT91_Config.in states that 
> > "Atmel AT91SAM9G20 ARM based systems" are not yet implemented. 
> > 
> > How difficult is this to do? I am willing to give it a shot 
> > if it simply involves creating/tweaking some configuration files. 
> > We were using the 9260 dev board, but have recently switched to 
> > the newer 9G20 board. However, when we push our 9260 kernel to 
> > the board and boot it with a 9G20-knowledgeable u-boot, it balks 
> > after uncompressing the kernel image with the following error: 
> > 
> > Uncompressing Linux......................done, booting the kernel. 
> > Error: unrecognized/unsupported machine ID (r1 = 0x00000658) 
> > Available machine support: 
> > ID (hex) NAME 
> > 0000044b Atmel AT91SAM9260-EK 
> > Please check your kernel config and/or bootloader. 
> > 
> > I initially thought this was a u-boot issue, but now I think it's 
> > just that buildroot does not yet know about 9G20 dev boards. 
> > 
> > Any direction/assistance would be appreciated. 
> 
> It appears the problem is actually in your kernel. 
> 
> U-boot passed a machine ID of (r1 = 0x00000658), which according to 
> arch/arm/tools/mach-types is: 
> 
> at91sam9g20ek MACH_AT91SAM9G20EK AT91SAM9G20EK 
> 1624 
> 
> But the linux kernel you are trying to bring up says that the only 
> machine supported is: 
> 
> Available machine support: 
> ID (hex) NAME 
> 0000044b Atmel AT91SAM9260-EK 
> 
> From arch/arm/tools/mach-types: 
> 
> at91sam9260ek MACH_AT91SAM9260EK AT91SAM9260EK 
> 1099 
> 
> It appears you have the 9G20 suppost in u-boot but still have a kernel 
> for the 9260. 
> 
> Hartley 
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[Buildroot] AT91SAM9G20 support?

[Mike Sander]

suffecool at comcast.net wrote:
> Yeah, that's what I am discovering.  I am now looking at various kernel releases to see if and when 9G20 support was added (if at all).
>
> Google searching found this link:
> http://lkml.org/lkml/2008/6/13/62
>
> where it appears that somebody back in June 2008 did a lot of work patching the kernel to get the 9G20 to be supported.  I'm downloading the 2.6.27 kernel now to see if it was added  into that one.
>
> --kev
>
>   

Kevin,
 
You will need the 2.6.27 kernel.  I got a g20 on Friday and successfully 
booted it.  I used an oct 22 buildroot snapshot, and selected the 2.6.27 
kernel. I initially did the buildroot configuration for the 9260.    
After everything was completed I went back and did a kernel "make 
at91sam9g20ek_defconfig, and redid the top level "make".  From what I 
can see, there is no g20 support outside of the kernel (as of a few 
weeks ago).  

For my initial testing I grabbed pre build bootstrap & u-boot for the 
9g20 from linux4sam
(ftp://www.linux4sam.org/pub/uboot/u-boot-1.1.5_atmel_1.7/u-boot-1.1.5_atmel_1.7-at91sam9g20ek-dataflash.bin).      

(ftp://www.linux4sam.org/pub/at91bootstrap/AT91Bootstrap_9g20/dataflash_at91sam9g20ek.bin)

I suspect the buildroot bootstrap & u-boot will work fine, but I have 
not tested them.

HTH

Mike