MTD, JFFS, my target -- bringing them together?

MTD, JFFS, my target -- bringing them together?

[Juan Gonzo]

Ok,

I am using Intel Strataflash with the CFI command
set.  I have managed to compile the kernel with the
MTD code in place.  I would like to use JFFS for the
filesystem.  The following were enabled with make
oldconfig:

   Memory Technology Device (MTD) support
   Common Flash Interface (CFI) support
   CFI support for Intel/Sharp Extended Command Set
chips
   CFI chips on memory bus support
   Direct blockdevice access to MTD devices
   Journalling Flash filesystem (JFFS) support

>From previous emails, it seems I have to supply a
read16() and write16() function for MTD to work
properly on my system.  Is this right?  Is that all
I have to supply?  What about all that info from the
website about populating the mtd_info struct and the
add_mtd_device business?  Do I still have to do that?

Thanks for any help,
   -- kelly



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Re: MTD, JFFS, my target -- bringing them together?

[David Woodhouse]

On Wed, 5 Jul 2000, Juan Gonzo wrote:

> From previous emails, it seems I have to supply a
> read16() and write16() function for MTD to work
> properly on my system.  Is this right?  Is that all
> I have to supply?  What about all that info from the
> website about populating the mtd_info struct and the
> add_mtd_device business?  Do I still have to do that?

No you don't. All you need to do is provide something based on the
physmap.c file which the CFI chip driver can use to access the chips. In
fact, in the majority of cases you should get away with only changing a
couple of #defines in that file to say where in physical memory the chips
are, and how large the range is that they're mapped into.

-- 
dwmw2




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