[flashrom] [PATCH 0/6] 4-bytes addressing support

[David Hendricks]

Hi Cédric,
Thanks for the patches. Indeed, 4BA is a feature that we've been looking at
for a while. I'll look forward to reviewing these patches in detail.

There are a few cases that need to be considered:
- Chips which have a command to switch to 4BA mode
- Chips which have a parallel instruction set for use with 4BA.
- Chips that exclusively use 4BA commands.

I tried to cover the first two cases in my patch:
https://chromium-review.googlesource.com/#/c/323359/
The third case was brought to our attention by Tim Chick:
http://patchwork.coreboot.org/patch/4437/

Hopefully we can come up with a good solution for all cases.


On Sat, Jun 11, 2016 at 9:28 AM, Cédric Le Goater <clg at kaod.org> wrote:

> Hi,
>
> Here's an old patchset proposed a while ago by Boris Baykov to add
> 4byte support to flashrom. I have been using it to flash N25Q256
> modules from a raspberry pi quite successfully. Could we restart a
> review cycle to see what needs fixing ?
>
> A port of the complete patchset on 0.9.9 is available here :
>
>           https://github.com/legoater/flashrom
>
> Thanks,
>
> C.
>
> Boris Baykov (6):
>   4BA: Basic support for 4-bytes addressing mode extensions
>   4BA: Flashrom integration for the 4-bytes addressing extensions
>   4BA: Winbond W25Q256.V chip (32MB) declaration, 4-bytes addr mode
>   4BA: Support for 4-bytes addressing via Extended Address Register
>   4BA: Support for new direct-4BA instructions + W25Q256.V update
>   4BA: Progress visualization for long read, writes and erases
>
>  Makefile      |   2 +-
>  chipdrivers.h |  22 ++
>  cli_output.c  |   3 +-
>  flash.h       |  21 ++
>  flashchips.c  |  48 +++
>  flashrom.c    |  61 ++++
>  serprog.c     |   5 +-
>  spi.c         |   5 +-
>  spi25.c       |  37 ++-
>  spi4ba.c      | 920
> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
>  spi4ba.h      | 114 ++++++++
>  11 files changed, 1231 insertions(+), 7 deletions(-)
>  create mode 100644 spi4ba.c
>  create mode 100644 spi4ba.h
>
> --
> 2.1.4
>
>
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>



-- 
David Hendricks (dhendrix)
Systems Software Engineer, Google Inc.
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