lantiq: use BT HomeHub 5 Type A OEM partition layout

This way the on nand bad block table is preserved and used. Add support
for nand OOB ECC checksums as well. It should fix all reported ubi
errors, which were all related to bad nand blocks and a purged on nand
bad block table.

The existing ubi partition will be reused, which eliminates the need
to touch the caldata during initial install. The BT u-boot has support
for loading a kernel from an ubi volume. It isn't necessary any longer
to replace the BT u-boot with a custom compiled one to use LEDE.

It is required to restore the BT Firmware and install LEDE from scratch
to switch to the new partition layout.

An image for restoring the BT firmware and installing LEDE is provided
at https://github.com/mkresin/lede/releases.

Signed-off-by: Mathias Kresin <dev@kresin.me>

4 files changed, 36 insertions, 35 deletions

diff --git a/target/linux/lantiq/base-files/etc/board.d/02_network b/target/linux/lantiq/base-files/etc/board.d/02_network
index 16b85a815b..c2a1fbe680 100755
--- a/target/linux/lantiq/base-files/etc/board.d/02_network
+++ b/target/linux/lantiq/base-files/etc/board.d/02_network
@@ -75,7 +75,8 @@ BTHOMEHUBV3A)
 	;;
 
 BTHOMEHUBV5A)
-	wan_mac=$(macaddr_add "$(mtd_get_mac_binary caldata 4364)" 1)
+	lan_mac=$(mtd_get_mac_binary_ubi caldata 4364)
+	wan_mac=$(macaddr_add "$lan_mac" 1)
 	ucidef_add_switch "switch0" \
 		"0:lan:3" "1:lan:4" "2:lan:2" "4:lan:1" "6t@eth0"
 	;;
diff --git a/target/linux/lantiq/base-files/etc/hotplug.d/firmware/11-ath10k-caldata b/target/linux/lantiq/base-files/etc/hotplug.d/firmware/11-ath10k-caldata
index dc95da78a5..2511ed6014 100644
--- a/target/linux/lantiq/base-files/etc/hotplug.d/firmware/11-ath10k-caldata
+++ b/target/linux/lantiq/base-files/etc/hotplug.d/firmware/11-ath10k-caldata
@@ -1,24 +1,31 @@
 #!/bin/sh
 # Based on ar71xx 11-ath10k-caldata and 10-rt2x00-eeprom
 
+[ -e /lib/firmware/$FIRMWARE ] && exit 0
+
+. /lib/functions.sh
+. /lib/functions/system.sh
+. /lib/functions/lantiq.sh
+. /lib/upgrade/nand.sh
+
 ath10k_caldata_die() {
 	echo "ath10k caldata: " "$*"
 	exit 1
 }
 
-ath10k_caldata_extract() {
+ath10k_caldata_extract_ubi() {
 	local part=$1
 	local offset=$2
-	local mtd
+	local count=$3
+	local ubidev=$(nand_find_ubi $CI_UBIPART)
+	local ubi
 
-	. /lib/functions.sh
+	ubi=$(nand_find_volume $ubidev $part)
+	[ -n "$ubi" ] || \
+		ath10k_caldata_die "no UBI volume found for $part"
 
-	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 $mtd"
+	dd if=/dev/$ubi of=/lib/firmware/$FIRMWARE bs=1 skip=$offset count=$count 2>/dev/null || \
+		ath10k_caldata_die "failed to extract from $ubi"
 }
 
 ath10k_caldata_set_macaddr() {
@@ -28,20 +35,13 @@ ath10k_caldata_set_macaddr() {
 				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")
 	board=$(lantiq_board_name)
 	case $board in
 		BTHOMEHUBV5A)
-			lan_mac=$(mtd_get_mac_binary caldata 4364)
-			wifi_mac=$(macaddr_add "$lan_mac" 3)
-			ath10k_caldata_extract "caldata" 20480
-			ath10k_caldata_set_macaddr $wifi_mac
+			ath10k_caldata_extract_ubi "caldata" 20480 2116
+			ath10k_caldata_set_macaddr $(macaddr_add $(mtd_get_mac_binary_ubi caldata 4364) +3)
 			;;
 		*)
 			ath10k_caldata_die "board $board is not supported yet"
diff --git a/target/linux/lantiq/base-files/etc/hotplug.d/firmware/12-ath9k-eeprom b/target/linux/lantiq/base-files/etc/hotplug.d/firmware/12-ath9k-eeprom
index 8185bf1949..2776275ea2 100644
--- a/target/linux/lantiq/base-files/etc/hotplug.d/firmware/12-ath9k-eeprom
+++ b/target/linux/lantiq/base-files/etc/hotplug.d/firmware/12-ath9k-eeprom
@@ -115,7 +115,8 @@ case "$FIRMWARE" in
 				ath9k_patch_firmware_mac $(macaddr_add $(mtd_get_mac_ascii uboot-env ethaddr) +2) 268 1 258
 				;;
 			BTHOMEHUBV5A)
-				ath9k_eeprom_extract "caldata" 4096
+				ath9k_ubi_eeprom_extract "caldata" 4096
+				ath9k_patch_firmware_mac $(macaddr_add $(mtd_get_mac_binary_ubi caldata 4364) +2) 268 0 258
 				;;
 			DGN3500*)
 				ath9k_eeprom_extract "calibration" 61440
diff --git a/target/linux/lantiq/dts/BTHOMEHUBV5A.dts b/target/linux/lantiq/dts/BTHOMEHUBV5A.dts
index e1b3e7131d..df55456f0c 100644
--- a/target/linux/lantiq/dts/BTHOMEHUBV5A.dts
+++ b/target/linux/lantiq/dts/BTHOMEHUBV5A.dts
@@ -33,6 +33,9 @@
 				reg = <0x1 0x0 0x2000000>;
 				#address-cells = <1>;
 				#size-cells = <1>;
+				nand-on-flash-bbt;
+				nand-ecc-strength = <3>;
+				nand-ecc-step-size = <256>;
 
 				partitions {
 					compatible = "fixed-partitions";
@@ -41,26 +44,25 @@
 
 					partition@0 {
 						label = "u-boot";
-						reg = <0x0 0x40000>;
+						reg = <0x0 0xa0000>;
 						read-only;
 					};
-					partition@40000 {
+					partition@a0000 {
 						label = "uboot-env";
-						reg = <0x40000 0x40000>;
-					};
-					caldata: partition@80000 {
-						label = "caldata";
-						reg = <0x80000 0x20000>;
+						reg = <0xa0000 0x20000>;
 						read-only;
 					};
-					partition@a0000 {
-						label = "kernel";
-						reg = <0xa0000 0x200000>;
+					partition@c0000 {
+						label = "unused";
+						reg = <0xc0000 0x40000>;
 					};
-					partition@2a0000 {
+					partition@100000 {
 						label = "ubi";
-						reg = <0x2a0000 0x7d60000>;
+						reg = <0x100000 0x7e80000>;
 					};
+					/*
+					 * last 512 KiB are for the bad block table, not writable
+					 */
 				};
 			};
 		};
@@ -216,7 +218,6 @@
 		#address-cells = <1>;
 		#size-cells = <0>;
 		reg = <0>;
-		mtd-mac-address = <&caldata 0x110c>;
 		lantiq,switch;
 
 		ethernet@0 {
@@ -250,8 +251,6 @@
 		#address-cells = <1>;
 		#size-cells = <0>;
 		reg = <1>;
-		mtd-mac-address = <&caldata 0x110c>;
-		mtd-mac-address-increment = <4>;
 		lantiq,wan;
 
 		ethernet@5 {