ar71xx: Do not use a hardcoded ath10k firmware mac address

[openwrt/openwrt.git] / target / linux / ar71xx / base-files / lib / preinit / 82_patch_ath10k

diff --git a/target/linux/ar71xx/base-files/lib/preinit/82_patch_ath10k b/target/linux/ar71xx/base-files/lib/preinit/82_patch_ath10k
index af12bd5d927181b3461573a330550d2d6c557995..b6af921449b0284d1e05212bbe618d77744e8a15 100644 (file)
--- a/target/linux/ar71xx/base-files/lib/preinit/82_patch_ath10k
+++ b/target/linux/ar71xx/base-files/lib/preinit/82_patch_ath10k
@@ -12,16 +12,19 @@ do_patch_ath10k_firmware() {
                return
        }
 
-       local firmware_md5_orig="fcb2fbd42d73a63fbf603505c718cbde"
-       local firmware_md5_current="$(md5sum $firmware_file)"
-       local firmware_md5_current="${firmware_md5_current%% *}"
+       local mac_offset=276
+       local mac_length=6
+       local default_mac="00:03:07:12:34:56"
+       local current_mac="$(hexdump -v -n $mac_length -s $mac_offset -e '5/1 "%02x:" 1/1 "%02x"' $firmware_file  2>/dev/null)"
 
-       # verify md5sum before patching
-       [ "$firmware_md5_orig" != "$firmware_md5_current" ] || {
+       # check if mac address was already patched
+       [ "$default_mac" = "$current_mac" ] || {
                return
        }
 
-       # some boards have bogus mac in otp, patch the default mac in the firmware
+       # some boards have bogus mac in otp (= directly in the PCIe card's EEPROM).
+       # we have to patch the default mac in the firmware because we cannot change
+       # the otp.
        case $(ar71xx_board_name) in
                dgl-5500-a1 | tew-823dru)
                        local mac
@@ -29,7 +32,7 @@ do_patch_ath10k_firmware() {
 
                        cp $firmware_file /tmp/ath10k-firmware.bin
                        macaddr_2bin $mac | dd of=/tmp/ath10k-firmware.bin \
-                               conv=notrunc bs=1 seek=276 count=6
+                               conv=notrunc bs=1 seek=$mac_offset count=$mac_length
 
                ;;
        esac