JEDEC probing redux

Joshua Wise joshua at joshuawise.com
Sun Nov 16 14:05:36 EST 2003


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

(consider information in this post outdated. I'm having mailer issues, sorry.)

> Surely this affects more than just the unlock addresses? Doesn't it mean
> that when reading, each 16-bit word of flash would appear _twice_?
No. I can't remember why in this decongestant-drugged state that I'm in
*wheezes loudly*, but I remember that it doesn't. Some quirk that the PXA
does. Check my debrick code in handhelds.org cvs:

http://cvs.handhelds.org/cgi-bin/viewcvs.cgi/debrick/fastjtag/rflash.c?rev=1.8&content-type=text/vnd.viewcvs-markup

Look at the programflash() code in there to see how I do it.

> What if you just add the appropriate shift to your map driver?
Then that'll shift over addresses that aren't unlock, which is definately not
what I want.

For what it's worth, when I added shift code to jedec_probe, that seemed to
work, however at some point my unlock addresses are getting reset (?!!?!) to
555/2aa, instead of 555<<1/2aa<<1. I should probably debug that.

/joshua

- --
Joshua Wise | www.joshuawise.com
GPG Key     | 0xEA80E0B3
Quote       | <lilo> I akilled *@* by mistake
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.2 (GNU/Linux)

iD8DBQE/t8qCPn9tWOqA4LMRAlUvAJ9vgWGG3hWHxdhNf+PBIw32oLJKGwCfS1AX
0onqXs6f0h3MRE9u8Yy4534=
=EuPq
-----END PGP SIGNATURE-----




More information about the linux-mtd mailing list