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Re: [microblaze-uclinux] CFI Flash on 8bit bus?

To: microblaze-uclinux@xxxxxxxxxxxxxx
Subject: Re: [microblaze-uclinux] CFI Flash on 8bit bus?
From: Anuroop M <anuroop.m@xxxxxxxxx>
Date: Wed, 13 Jul 2005 10:15:37 +0530
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In-reply-to: <00ef01c586f6$155b29e0$6502a8c0@curranusi>
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Reply-to: microblaze-uclinux@xxxxxxxxxxxxxx
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Hi Curran,
               first check whether your flash is 8 bit configurable.
then check whether it is bigendian or little endian format. if its EDK
generated, u can debug through xmd. go to xmd and type command for
getting the type of the flash, using 'mwr','mrd' commands.
..hope it will help u .

--Anuroop


On 7/12/05, Tom Curran <narrucmot@verizon.net> wrote:
> Hello,
> 
> The following email thread was sent to me by a friend.  I am having what may
> be similar issues with an 8-bit flash device attached to the opb_emc of my
> MicroBlaze platform.  I cannot seem to get the flash device to respond to
> queries for its Manufacturer_ID or Device_ID.  I am curious about the
> modifications to the opb_emc that are mentioned below?  What sort of
> modifications?  Where can I get them?  Although I am not running an OS on my
> platform, I think they might be relevant.  Any help is appreciated!  Many
> thanks in advance.
> 
> --Tom Curran
> Xilinx FPGA and Microblaze design lackey
> narrucmot@verizon.net
> 
> >
> > -----Original Message-----
> > From: owner-microblaze-uclinux@itee.uq.edu.au
> > [mailto:owner-microblaze-uclinux@itee.uq.edu.au] On Behalf Of Errol
> > Terblanche
> > Sent: Thursday, July 07, 2005 2:57 AM
> > To: microblaze-uclinux@itee.uq.edu.au
> > Subject: RE: [microblaze-uclinux] CFI Flash on 8bit bus?
> >
> > Hi David,
> >
> > Ahh, so that is why it specifically mentions "16-bit flash works with
> > JFFS2
> > filesystem". :-).
> >
> > Thanks for the info.
> >
> > Thanx,
> > E
> >
> >
> > -----Original Message-----
> > From: owner-microblaze-uclinux@itee.uq.edu.au
> > [mailto:owner-microblaze-uclinux@itee.uq.edu.au] On Behalf Of David
> > Banas
> > Sent: Tuesday, July 05, 2005 10:44 PM
> > To: microblaze-uclinux@itee.uq.edu.au
> > Subject: RE: [microblaze-uclinux] CFI Flash on 8bit bus?
> >
> > Hi Erol,
> >
> > Those of us using 16-bit wide FLASH have had to use some modifications
> > to
> > the actual HDL code for the EMC core. These mods were originally written
> > by
> > Steve Sanders. I wonder if you're in the same boat and might need to
> > follow
> > Steve's example, in order to make the EMC core compatible with your
> > FLASH.
> >
> > David Banas
> > Field Applications Engineer
> > Nu Horizons Electronics Corp.
> > 2070 Ringwood Avenue
> > San Jose, CA 95131
> > (408)434-0800 - office
> > (415)846-5837 - cell
> > http://www.nuhorizons.com
> >
> >> -----Original Message-----
> >> From: owner-microblaze-uclinux@itee.uq.edu.au
> > [mailto:owner-microblaze-
> >> uclinux@itee.uq.edu.au] On Behalf Of Errol Terblanche
> >> Sent: Friday, July 01, 2005 12:42 AM
> >> To: microblaze-uclinux@itee.uq.edu.au
> >> Subject: [microblaze-uclinux] CFI Flash on 8bit bus?
> >>
> >> Hi everyone,
> >>
> >> I have been struggling with flash for the last few days, and I'm at my
> >> wit's
> >> end.
> >>
> >> I have configured mtd to use Intel flash and to use 8bit bus width.
> >>
> >> During boot I get the following message:
> >>
> >> [snip]
> >> physmap flash device: 1000000 at 24000000
> >> cfi_cmdset_0001: Erase suspend on write enabled
> >> 0: offset=0x0,size=0x20000,blocks=128
> >> Using buffer write method
> >> physmap: no partition info available, registering whole flash at once
> >> [snip]
> >>
> >> That tells me that it did detect the chip, as its block size is
> >> 0x20000(128KB) and it has 128 blocks for a total of 16MB.
> >>
> >> But when I try and format(or dd) it I get the following:
> >>
> >> [snip]
> >> # ftl_format /dev/mtd0
> >> Partition size = 16 mb, erase unit size = 128 kb, 1 transfer units
> >> Reserved
> >> 5%, formatted size = 15631872 bytes Erasing all blocks...
> >> Chip reports improper command sequence: status 0x7000000000
> >>
> >> block erase failed: Input/output error
> >> format failed.
> >> [snip]
> >>
> >> The only thing that I can think of is that mtd is accessing it as
> >> something
> >> other than 8 bit mode thus sending erroneous blank commands during the
> >> erase
> >> command sequence. And why is 0x7000000000 a 40 bit number?
> >>
> >> Thanx,
> >> Errol
> >>
> >>
> >> ___________________________
> >> microblaze-uclinux mailing list
> >> microblaze-uclinux@itee.uq.edu.au
> >> Project Home Page :
> > http://www.itee.uq.edu.au/~jwilliams/mblaze-uclinux
> >> Mailing List Archive : http://www.itee.uq.edu.au/~listarch/microblaze-
> >> uclinux/
> >>
> 
> ___________________________
> microblaze-uclinux mailing list
> microblaze-uclinux@itee.uq.edu.au
> Project Home Page : http://www.itee.uq.edu.au/~jwilliams/mblaze-uclinux
> Mailing List Archive : http://www.itee.uq.edu.au/~listarch/microblaze-uclinux/
> 
>

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References:
- [microblaze-uclinux] CFI Flash on 8bit bus?
  - From: Tom Curran

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