On Wed, Jun 21, 2017 at 6:51 PM, Ed Swierk eswierk@skyportsystems.com wrote:
On Mon, Apr 17, 2017 at 9:54 PM, David Hendricks david.hendricks@gmail.com wrote:
Getting 4-byte address support in is something I'm interested in as
well. In fact I have parts coming in the mail this week :-)
On Mon, Apr 17, 2017 at 6:43 PM, Alex Henderson <
ahenderson@aparnasystems.com> wrote:
Hi there:
I just started experimenting with flashrom using aDediprog SF600 this weekend. I noticed that there’s no support for any of the 256Mb or 512Mb SPI NOR parts (4 byte addressing an issue?).
The Dediprog SF600 has commands for 4-byte addressing, but I was not
able to get them working in the time I had to play with it. We can probably also ask Dediprog if they have an updated command spec, maybe there was a problem in the one I was looking at.
Is there a newer version than 0.9.9 that I should try? I did find that
the Google fork for chromeOS has a number of these parts (W25Q256, N25Q256, SST_25F256).
Yes, but the systems those went in treated them as 16MB parts. The
firmware (coreboot) is small so there wasn't really need for the extra space.
I would be happy to try an unreleased version & reportresults. I can also test with an FTDI232 based programmer. The boards I can test with currently have various versions of 25q512, 25q256, 25q128 and 25q32. Functionality with the smaller parts looks good.
I'm a bit late to the party here, but in case it's relevant: I successfully programmed a Micron N25Q512, which is a 64 MByte SPI flash with 4-byte addressing, using patches originally from Boris Baykov on top of a more current flashrom. See https://github.com/skyportsystems/flashrom/commits/master .
Both FT232H module and STM32 Blue Pill board with stm32-vserprog firmware work as programmers.
Nice! I've also had success with Boris's patches, as have others: https://review.coreboot.org/#/c/19525/ . That version is squashed, though, so perhaps the patches in your repo will be better for merging.
I also uploaded a patch to enable 4BA support on the Dediprog SF600 which Alex might be interested in trying out: https://review.coreboot.org/#/c/19858/