OpenWrt – Rev 4

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#!/bin/sh

. /lib/functions.sh
. /lib/functions/system.sh

do_patch_ath10k_firmware() {
        local firmware_file="/lib/firmware/ath10k/QCA988X/hw2.0/firmware-5.bin"

        # bail out if firmware does not exist
        [ -f "$firmware_file" ] || return

        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)"

        # check if mac address was already patched
        [ "$default_mac" = "$current_mac" ] || return

        # 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 $(board_name) in
        dgl-5500-a1|\
        tew-823dru)
                local mac
                mac=$(mtd_get_mac_ascii nvram wlan1_mac)

                cp $firmware_file /tmp/ath10k-firmware.bin
                macaddr_2bin $mac | dd of=/tmp/ath10k-firmware.bin \
                        conv=notrunc bs=1 seek=$mac_offset count=$mac_length
                ;;
        esac

        [ -f /tmp/ath10k-firmware.bin ] || return

        cp /tmp/ath10k-firmware.bin $firmware_file
        rm /tmp/ath10k-firmware.bin
}

check_patch_ath10k_firmware() {
        case $(board_name) in
        dgl-5500-a1|\
        gl-x1200|\
        tew-823dru)
                do_patch_ath10k_firmware
                ;;
        esac
}

boot_hook_add preinit_main check_patch_ath10k_firmware