Re: Accessing DiskonChip

[Sanal Kumar <p_sanalk@yahoo.com>]

Hi David,

I have added following lines in the docprobe.c

static unsigned long __initdata doc_locations[] = {
--
--
#elif defined (__arm__)
	0x18000000,
#else
#warning ---
#endif
0};

So i think I dont need to define it in
CONFIG_MTD_DOCPROBE_ADDRESS.



And My log message is like this .

DiskOnChip Millennium found at address 0x18000000
Flash chip found: Manufacturer ID: 98, Chip ID: E6
(Toshiba TC58V64AFT/DC)
1 flash chips found. Total DiskOnChip size: 8 MiB

out-of-line wait
_DoC_WaitReady called for out-of-line wait
.
. _DoC_WaitReady called for out-of-line wait
Could not find valid boot record
Could not mount NFTL device


In Our board SA_A1 ->DOC_A0 .....  SA_A13->DOC_A12 ,So
there is <<1 .

I have changed the ReadDOC_ and WriteDOC_
in include/linux/mtd/doc2000.h 
#define ReadDOC_(adr,reg) readb(((unsigned
long)adr)+((reg(<<1));
#define WriteDOC_(d,adr,reg) writeb(d,((unsigned
long)adr)+((reg(<<1));


I am able to read & write to /dev/mtd0  using dd.

I have added nftl support. So i need to support make a
filesystem on disk on chip How can I do that.



Best Regards
Sanal.


--- David Woodhouse <dwmw2@infradead.org> wrote:
> 
> p_sanalk@yahoo.com said:
> > I am working on an Assabet like board. I am trying
> to make a
> > filesystem on msystem Disk on chip.(The board
> boots using ramdisk).
> 
> > I have added entries for mtd* and nftl* in in /dev
> 
> 
> You haven't set CONFIG_MTD_DOCPROBE_ADDRESS and
> since you're not on a 
> platform which has standard addresses at which to
> probe for a DiskOnChip, 
> the driver has no idea where to look for it. 
> 
> Set CONFIG_MTD_DOCPROBE_ADDRESS to the physical
> address at which the 
> DiskOnChip is mapped, and check the definitions of
> ReadDOC_ and WriteDOC_ 
> in include/linux/mtd/doc2000.h are correct for the
> way you've wired it up.
> 
> --
> dwmw2
> 
> 
> 
>
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