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ath79: add ath9k calibration data MAC addresses patching

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This patch copies over the MAC patching helper functions from lantiq's
target/linux/lantiq/base-files/etc/hotplug.d/firmware/12-ath9k-eeprom
file.

Not all vendors bothered to write the correct MAC addresses for the
ath9k wifi into the calibration data. And while ath9k does have some
special dt-properties to extract the addresses from a fixed position,
there are still devices that require userspace to edit or modify
the caldata.

In my case, the MAC address for the Wi-Fi device is stored in an
unsorted key-value based "nvram" database and there's an existing
userspace tool to extract the data.

Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
This commit is contained in:
Christian Lamparter 2018-08-10 23:24:48 +02:00 committed by Mathias Kresin
parent dfee452713
commit a441c86d93
1 changed files with 50 additions and 0 deletions
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50
target/linux/ath79/base-files/etc/hotplug.d/firmware/10-ath9k-eeprom
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@ -42,6 +42,56 @@ ath9k_eeprom_extract_reverse() {
printf "%b" "$caldata" > /lib/firmware/$FIRMWARE printf "%b" "$caldata" > /lib/firmware/$FIRMWARE
} }
xor() {
local val
local ret="0x$1"
local retlen=${#1}
shift
while [ -n "$1" ]; do
val="0x$1"
ret=$((ret ^ val))
shift
done
printf "%0${retlen}x" "$ret"
}
ath9k_patch_fw_mac() {
local mac=$1
local mac_offset=$2
local chksum_offset=$3
local xor_mac
local xor_fw_mac
local xor_fw_chksum
[ -z "$mac" -o -z "$mac_offset" ] && return
[ -n "$chksum_offset" ] && {
xor_mac=${mac//:/}
xor_mac="${xor_mac:0:4} ${xor_mac:4:4} ${xor_mac:8:4}"
xor_fw_mac=$(hexdump -v -n 6 -s $mac_offset -e '/1 "%02x"' /lib/firmware/$FIRMWARE)
xor_fw_mac="${xor_fw_mac:0:4} ${xor_fw_mac:4:4} ${xor_fw_mac:8:4}"
xor_fw_chksum=$(hexdump -v -n 2 -s $chksum_offset -e '/1 "%02x"' /lib/firmware/$FIRMWARE)
xor_fw_chksum=$(xor $xor_fw_chksum $xor_fw_mac $xor_mac)
printf "%b" "\x${xor_fw_chksum:0:2}\x${xor_fw_chksum:2:2}" | \
dd of=/lib/firmware/$FIRMWARE conv=notrunc bs=1 seek=$chksum_offset count=2
}
macaddr_2bin $mac | dd of=/lib/firmware/$FIRMWARE conv=notrunc bs=1 seek=$mac_offset count=6
}
ath9k_patch_fw_mac_crc() {
local mac=$1
local mac_offset=$2
local chksum_offset=$((mac_offset - 10))
ath9k_patch_fw_mac "${mac}" "${mac_offset}" "${chksum_offset}"
}
board=$(board_name) board=$(board_name)
case "$FIRMWARE" in case "$FIRMWARE" in