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mirror of https://review.coreboot.org/flashrom.git synced 2025-09-29 15:54:56 +02:00
Victor Lim 1927badfba flashchips: redo add GD25B256E and GD25R256E
Redo this commit because the previous commit did not trigger Jenkins

removed FEATURE_WRSR_EXT2 from the model after datasheet review.
replace
printlock	= SPI_PRETTYPRINT_STATUS_REGISTER_BP3_SRWD,
.unlock		= SPI_DISABLE_BLOCKPROTECT,

with

.printlock	= SPI_PRETTYPRINT_STATUS_REGISTER_BP4_SRWD,
.unlock		= SPI_DISABLE_BLOCKPROTECT_BP4_SRWD,

GD25B256E: 3V 256Mbit, Quad enabled.
GD25R256E: GD25B256E features + RPMC, so they share the same datasheet on flash side
https://www.gigadevice.com.cn/Public/Uploads/uploadfile/files/20230627/DS-00658-GD25B256E-Rev1.1.pdf

Tested both models on ch347 with erase, write, read and protection.

Change-Id: I1596628211d508d3057893c049f1a1c95a123073
Signed-off-by: Victor Lim <vlim@gigadevice.com>
2024-08-24 21:45:28 -07:00
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flashrom README
===============

flashrom is a utility for detecting, reading, writing, verifying and erasing
flash chips. It is often used to flash BIOS/EFI/coreboot/firmware images
in-system using a supported mainboard, but it also supports flashing of network
cards (NICs), SATA controller cards, and other external devices which can
program flash chips.

It supports a wide range of flash chips (most commonly found in SOIC8, DIP8,
SOIC16, WSON8, PLCC32, DIP32, TSOP32, and TSOP40 packages), which use various
protocols such as LPC, FWH, parallel flash, or SPI.

Do not use flashrom on laptops (yet)! The embedded controller (EC) present in
many laptops might interact badly with any attempts to communicate with the
flash chip and may brick your laptop.

Please make a backup of your flash chip before writing to it.

Please see the flashrom(8) manpage :doc:`classic_cli_manpage`.


Building / installing / packaging
---------------------------------

flashrom is built with **meson**. TLDR:

::

    meson setup builddir
    meson compile -C builddir
    meson test -C builddir
    meson install -C builddir

For full detailed instructions, follow the information in
:doc:`dev_guide/building_from_source`

Contact
-------

The official flashrom website is:

  https://www.flashrom.org/

For available contact methods see :doc:`contact`
Description
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Readme 70 MiB
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