Re: Booting PhyTec PCM043/IMX35 from USB/SD-Card

["Peter Kuennemann@Crane-Soft" <pkue@crane-soft.de>]

Am 28.06.2012 12:43, schrieb Sascha Hauer:
>> ...
>> However, I still cannot access the mmc from barebox. It would be enough to be able to
>> read the mmc. I want to be able to store kernel or rootfs image updates on the mmc
>> and flash them to either NAND or NOR after reboot to enable remote update services.
>>
>> Question: "How can I access the MMC from barebox (read only may be sufficient)
> 
> The pcm043 currently does not have mmc support. You have to add this to
> the board file:
> 
> imx35_add_mmc0(NULL);
> 
> or
> 
> imx35_add_mmc1(NULL);
> 
> depending on which port is routed to the slot. Also you have to setup
> the iomuxer (you can probably copy the pin settings from the kernel). Of
> course you also have to enable MMC support in the config.
> 
> Sascha
> 
> 

I have tried to update the board code accordingly but stumbled upon another
problem. The size of barebox increased to 0x40bb7 so I changed the
partition definitions in pcm043.c as follows:

#define CONFIG_MX35_BBSIZE      0x42000
   ...
   devfs_add_partition("nor0", 0x00000, CONFIG_MX35_BBSIZE, PARTITION_FIXED, "self0"); /* ourself */
   devfs_add_partition("nor0", CONFIG_MX35_BBSIZE, 0x20000, PARTITION_FIXED, "env0");
   ...
Barebox boots OK but after having saved the environment (saveenv) it dow not boot anymore.

Barebox boot messages ...

Malloc space: 0x86e00000 -> 0x87dfffff (size 16 MB)
Stack space : 0x86df8000 -> 0x86e00000 (size 32 kB)
envfs: wrong magic on /dev/env0
no valid environment found on /dev/env0. Using default environment   <== expected
running /env/bin/init...

devinfo <== What is defined ?
...
`---- cfi_flash0
     `---- 0x00000000-0x01ffffff: /dev/nor0
     `---- 0x00000000-0x00041fff: /dev/self0
     `---- 0x00042000-0x0005ffff: /dev/env0

saveenv  <== save the environment
reset    <== nothing after here

What is wrong here?

Peter

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