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| author | Christian Lamparter <chunkeey@gmail.com> | 2018-08-10 23:24:48 +0200 |
|---|---|---|
| committer | Mathias Kresin <dev@kresin.me> | 2018-08-11 21:36:27 +0200 |
| commit | a441c86d93657121afe8117f8329b7095f7154d2 (patch) | |
| tree | e33e61c6fd6bb46bd554c4eb54172c19aede7405 | |
| parent | dfee452713e6b3c10aafc6174f8087a920b54402 (diff) | |
| download | mtk-20170518-a441c86d93657121afe8117f8329b7095f7154d2.zip mtk-20170518-a441c86d93657121afe8117f8329b7095f7154d2.tar.gz mtk-20170518-a441c86d93657121afe8117f8329b7095f7154d2.tar.bz2 | |
ath79: add ath9k calibration data MAC addresses patching
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>
| -rw-r--r-- | target/linux/ath79/base-files/etc/hotplug.d/firmware/10-ath9k-eeprom | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/target/linux/ath79/base-files/etc/hotplug.d/firmware/10-ath9k-eeprom b/target/linux/ath79/base-files/etc/hotplug.d/firmware/10-ath9k-eeprom index 5d52af7..cd8f19b 100644 --- a/target/linux/ath79/base-files/etc/hotplug.d/firmware/10-ath9k-eeprom +++ b/target/linux/ath79/base-files/etc/hotplug.d/firmware/10-ath9k-eeprom @@ -42,6 +42,56 @@ ath9k_eeprom_extract_reverse() { 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) case "$FIRMWARE" in |