Re: Can I change 'RedBoot Config' using MTD driver. ?

["Amitesh Singh" <singh.amitesh@xxxxxxxxx>]

Hi Gregory
Thanks for the Reply.
I have modified the code(MTD layer)
'mtdpart.c".(linux-2.6.x/drivers/mtd)

if ((slave->mtd.flags & MTD_WRITEABLE) &&
                 (slave->mtd.size % slave->mtd.erasesize)) {
             //      slave->mtd.flags &= ~MTD_WRITEABLE;
                     slave->mtd.flags &=MTD_WRITEABLE;
                     printk ("mtd: partition \"%s\" doesn't end on
an erase block -- force read-only---Hacked ;-)\n",
                             parts[i].name);
             }

Now,I am able to read/write "RedBoot config" partition. ;-)

Best Regards
Amitesh Singh
http://www.amitesh.info

On 9/5/06, Gregory CLEMENT <gclement00@xxxxxxxxx> wrote:
> > Hi all
> Hi,
>
> >   My Task is to set "Boot script" (RedBoot config) value via a linux
> > command.
> >
> > As on RedBoot prompt,we set configurations using 'fconfig',is there any
> > Linux tool which does the same ?
>
> I don't know any, I think you have to make it.
>
> >  i tried to do it in my way.
> >
> > # cat /proc/mtd
> > dev:    size   erasesize  name
> > mtd0: 00040000 00020000 "RedBoot"
> > mtd1: 00f80000 00020000 "unallocated"
> > mtd2: 00001000 00020000 "RedBoot config"
> > mtd3: 00020000 00020000 "FIS directory"
> >
> >
> > First , i copied 'mtd2' using 'dd' and then changed the binary using
> > 'hexedit' (just changed Boot script).
> > Before booting,I unlocked RedBoot partitions.
> > ++++++++++++++++++++++++++++++ +++++++++++++++++++++++++
> > RedBoot> fis list
> > Name              FLASH addr  Mem addr    Length      Entry point
> > RedBoot           0x50000000  0x50000000  0x00040000  0x00000000
> > RedBoot config    0x50FC0000  0x50FC0000  0x00001000  0x00000000
> > FIS directory     0x50FE0000  0x50FE0000  0x00020000  0x00000000
> > RedBoot> fis unlock RedBoot
> > ... Unlock from 0x50000000-0x50040000: ..
> > RedBoot> fis unlock "RedBoot config"
> > ... Unlock from 0x50fc0000-0x50fc1000: .
> > RedBoot> fis unlock "FIS directory"
> > ... Unlock from 0x50fe0000-0x51000000: .
> > ++++++++++++++++++++++++++++++ +++++++++++++++++++++++++++++++++++
> >
> > I am able to read/write other partitions (including FIS directory (have
> n't
> > checked for RedBoot :P) ) except "RedBoot config".
> > Any suggestions ???
>
> In your log you have:
>
> > Uncompressing
> > Linux.....................................................................
> > done, booting the kernel.
> > Linux version 2.6.12-uc0 (root@buildsys.***********.com) (gcc version
> 3.3.2)
> [...]
> > 0x00fc0000-0x00fc1000 : "RedBoot config"
> > mtd: partition "RedBoot config" doesn't end on an erase block -- force
> > read-only
> It tells you that the "redboot config" don't fit an erase block, so
> mtd will refuse to erase it because it will erase more than this
> partition.
> You have to make your "RedBoot config" partition bigger for fitting
> your block erase size.
> If you can build RedBoot it is easy to fix it.
> If you can't, then you have to find a way to tell mtd that "redboot
> config" partition have the size   of the space beetewen "RedBoot"
> partition and "FIS directory" partition.
>
>
> --
> Gregory CLEMENT
> Adeneo

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