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ar71xx: fix 5 GHz Wi-Fi on NBG6716

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Some NBG6716 do not have ath10k calibration data in flash, only in chip
OTP. To determine if flash has a valid calibration data, the first two
bytes telling the length of the calibration data are checked against the
requested length. If the lengths match, calibration data is valid and
read from flash.

Signed-off-by: Matti Laakso <matti.laakso@outlook.com>
This commit is contained in:
Matti Laakso 2018-01-14 17:39:53 +02:00 committed by Piotr Dymacz
parent 22ae9b742b
commit 2ea98fc39b
1 changed files with 7 additions and 1 deletions
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8
target/linux/ar71xx/base-files/etc/hotplug.d/firmware/11-ath10k-caldata
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@ -18,12 +18,18 @@ ath10kcal_extract() {
local part=$1 local part=$1
local offset=$2 local offset=$2
local count=$3 local count=$3
local mtd local mtd cal_size
mtd=$(find_mtd_chardev $part) mtd=$(find_mtd_chardev $part)
[ -n "$mtd" ] || \ [ -n "$mtd" ] || \
ath10kcal_die "no mtd device found for partition $part" ath10kcal_die "no mtd device found for partition $part"
# Check that the calibration data size in header equals the desired size
cal_size=$(dd if=$mtd bs=2 count=1 skip=$(( $offset / 2 )) conv=swab 2>/dev/null | hexdump -ve '1/2 "%d"')
[ "$count" = "$cal_size" ] || \
ath10kcal_die "no calibration data found in $part"
dd if=$mtd of=/lib/firmware/$FIRMWARE bs=1 skip=$offset count=$count 2>/dev/null || \ dd if=$mtd of=/lib/firmware/$FIRMWARE bs=1 skip=$offset count=$count 2>/dev/null || \
ath10kcal_die "failed to extract calibration data from $mtd" ath10kcal_die "failed to extract calibration data from $mtd"
} }