openwrt/target/linux/ar71xx/base-files/lib/preinit/82_patch_ath10k

#!/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|\
	tew-823dru)
		do_patch_ath10k_firmware
		;;
	esac
}

boot_hook_add preinit_main check_patch_ath10k_firmware