Re: [U-Boot] How to start U-Boot for i.MX31 NAND out of RedBoot (out of RAM)
Hello
Magnus Lilja lilja.magnus@gmail.com 14.07.09 19.43 Uhr >>>
Hi
2009/7/14 Ulrich Gerster gersteru@dhbw-loerrach.de:
Hello.
Magnus Lilja lilja.magnus@gmail.com 14.07.09 16.03 Uhr >>>
I used the patch from you out of this posting: [U-Boot-Users] [PATCH RFC 3/5] i.MX31: Add i.MX31 NAND Flash Controller driver. http://lists.denx.de/pipermail/u-boot/2008-August/038239.html
They should work, or not? Do they require something else?
I haven't tried that driver on a recent U-boot so I don't know if (or how) it will work when applied to a recent U-Boot.
I'm using the u-boot master release of middle of June. How can I ensure that your patch is working? Or how do I know what is missing that it works?
You need to use either a debugger or add printf's to see what's going on (to the mxc_nd.c or whatever the file is called.
I have the drivers working now. But there's a little problem left. When I try to use u-boot to update itself (write itself from RAM to Flash) it seems that it overwrites the out of band information too. So when I try to reboot nothing is working because every program assumes that the first blocks are bad. Do you have a suggestion how to fix that issue?
Thanks. Ulrich Gerster
Hi
2009/7/22 Ulrich Gerster gersteru@dhbw-loerrach.de:
Hello
Magnus Lilja lilja.magnus@gmail.com 14.07.09 19.43 Uhr >>>
Hi
2009/7/14 Ulrich Gerster gersteru@dhbw-loerrach.de:
Hello.
Magnus Lilja lilja.magnus@gmail.com 14.07.09 16.03 Uhr >>>
I used the patch from you out of this posting: [U-Boot-Users] [PATCH RFC 3/5] i.MX31: Add i.MX31 NAND Flash Controller driver. http://lists.denx.de/pipermail/u-boot/2008-August/038239.html
They should work, or not? Do they require something else?
I haven't tried that driver on a recent U-boot so I don't know if (or how) it will work when applied to a recent U-Boot.
I'm using the u-boot master release of middle of June. How can I ensure that your patch is working? Or how do I know what is missing that it works?
You need to use either a debugger or add printf's to see what's going on (to the mxc_nd.c or whatever the file is called.
I have the drivers working now. But there's a little problem left. When I try to use u-boot to update itself (write itself from RAM to Flash) it seems that it overwrites the out of band information too.
That's normal since writing new data means writing a new error correcting code.
So when I try to reboot nothing is working because every program assumes that the first blocks are bad. Do you have a suggestion how to fix that issue?
Not sure that I understand what "every program assumes..." means. But my guess is that the OOB layout may be different in nand_spl/nand_boot_fsl_nfc.c compared to drivers/mtd/nand/mxc_nd.c so the nand_spl may interpret the OOB information that mxc_nd.c has written in a different way. This is especially true for large page NAND since the i.MX31 controller uses a non-standard layout, for small page NAND there should be no problem (although I don't know if nand_spl has been tested on small page nand yet).
/Magnus
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Magnus Lilja -
Ulrich Gerster