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chipset_enable.c: Use PCI_ACCESS_ECAM to access pci register

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In the latest pciutils(v3.13.0), it supports accessing pci registers
by ecam. This patch uses libpci version check to decide whether
flashrom calls libpci and use 0xcf8/0xcfc or ecam to access pci
registers.

BUG=b:359813524
TEST=with libpci >= 3.13.0, flashrom is working with ECAM access

Change-Id: I4549f87c8b01da0a1d3d8ce0b3b75c1f5fa2cbab
Signed-off-by: Kane Chen <kane.chen@intel.com>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/83896
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Hsuan-ting Chen <roccochen@google.com>
Reviewed-by: Peter Marheine <pmarheine@chromium.org>
This commit is contained in:
Kane Chen
2024-08-13 16:40:08 +08:00
committed by Peter Marheine
parent 33dda3387c
commit 1197f0832d
3 changed files with 22 additions and 1 deletions
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10
doc/release_notes/devel.rst
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@ -22,4 +22,12 @@ Build only supported with Meson
As documented in the :doc:`v1.4 release notes <v_1_4>`, support for building
flashrom with make has been removed; all Makefiles have been deleted. Meson is
now the only supported tool for building flashrom from source.
now the only supported tool for building flashrom from source.
New Feature
===========
Libpci 3.13.0 and onwards support ECAM to access pci registers. Flashrom will
be moved to ECAM from IO port 0xcf8/0xcfc if the libpci version is >= 3.13.0.
The ECAM has been supported for a very long time, most platforms should support
it. For those platforms don't support ECAM, libpci will terminate the process by
exit.