lantiq: Add support for the BT Home Hub 5A

u-boot support depends on the next "upstream" version ([0]) from
Daniel Schwierzeck.
Since the installation process is quite complicated a "how to" was
added to the wiki: [1]

[0] https://github.com/danielschwierzeck/u-boot-lantiq/tree/openwrt/v2014.01-next
[1] http://wiki.openwrt.org/toh/bt/homehub_v5a

V2: Use the correct PCI interrupt (fixes 2.4GHz wifi)
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>

SVN-Revision: 46223

target/linux/lantiq/base-files/etc/hotplug.d/firmware/11-ath10k-caldata

@@ -0,0 +1,51 @@
+#!/bin/sh
+# Based on ar71xx 11-ath10k-caldata and 10-rt2x00-eeprom
+
+ath10k_caldata_die() {
+	echo "ath10k caldata: " "$*"
+	exit 1
+}
+
+ath10k_caldata_extract() {
+	local part=$1
+	local offset=$2
+	local mtd
+
+	. /lib/functions.sh
+
+	mtd=$(find_mtd_part $part)
+	[ -n "$mtd" ] || \
+		ath10k_caldata_die "no mtd device found for partition $part"
+
+	dd if=$mtd of=/lib/firmware/$FIRMWARE bs=1 skip=$offset count=2116 || \
+		ath10k_caldata_die "failed to extract from $mtd"
+}
+
+ath10k_caldata_set_macaddr() {
+	local macaddr=$1
+
+	macaddr_2bin $macaddr | dd of=/lib/firmware/$FIRMWARE \
+				conv=notrunc bs=1 seek=6 count=6
+}
+
+[ -e /lib/firmware/$FIRMWARE ] && exit 0
+. /lib/functions.sh
+. /lib/functions/system.sh
+. /lib/functions/lantiq.sh
+
+case "$FIRMWARE" in
+"ath10k/cal-pci-0000:02:00.0.bin")
+	local board=$(lantiq_board_name)
+	case $board in
+		BTHOMEHUBV5A)
+			local lan_mac=$(mtd_get_mac_binary caldata 4364)
+			local wifi_mac=$(macaddr_add "$lan_mac" 3)
+			ath10k_caldata_extract "caldata" 20480
+			ath10k_caldata_set_macaddr $wifi_mac
+			;;
+		*)
+			ath10k_caldata_die "board $board is not supported yet"
+			;;
+	esac
+	;;
+esac