chromeos: Add a function to copy VPD WiFi calibration data to CBMEM
This patch adds functions looking in the VPD for WiFi calibration
data, and if found, copying the calibration blobs into CBMEM.
Two possible key names templates are used: wifi_base64_calibrationX
and wifi_calibrationX, where X is replaced by the WiFi interface
number. Up to four interfaces can be provisioned.
The calibration data will be retrieved from CBMEM by the bootloader
and placed into the device tree before starting the kernel.
The structure of the WiFi calibration data CBMEM entry is defined
locally: it is a concatenation of the blob names and their contents.
Each blob is padded as necessary to make sure that the size divisible
by four.
To make sure that the exactly required amount of memory is allocated
for the CBMEM entry, the function first scans the VPD, caching the
information about the available blobs and calculating their combined
size.
Then the required size CBMEM entry is allocates and the blobs are
copied into it.
BRANCH=storm
BUG=chrome-os-partner:32611
TEST=when this function is called, and the VPD includes calibration
data blobs, the WIFI entry shows up in the list of CBMEM entries
reported by coreboot.
Original-Change-Id: Ibe02dc36ff6254e3b9ad0a5bd2696ca29e1b2be3
Original-Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/225271
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
(cherry picked from commit 9fe185ae5fdc1a896bf892b498bff27a3462caeb)
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Change-Id: Ia60f0c5c84decf9854426c4f0cb88f8ccee69046
Reviewed-on: http://review.coreboot.org/9435
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
3 files changed