ar71xx: add support for Cisco Meraki Z1 Cloud Managed Teleworker Gateway

This patch adds support for Cisco's Z1.
Detailed instructions for the flashing the device can
be found in the OpenWrt wiki:
<https://wiki.openwrt.org/toh/meraki/z1>

Signed-off-by: Chris Blake <chrisrblake93@gmail.com>

4 files changed, 56 insertions, 18 deletions

diff --git a/target/linux/ar71xx/base-files/lib/ar71xx.sh b/target/linux/ar71xx/base-files/lib/ar71xx.sh
index 7a3759e..dae6fb2 100755
--- a/target/linux/ar71xx/base-files/lib/ar71xx.sh
+++ b/target/linux/ar71xx/base-files/lib/ar71xx.sh
@@ -1134,6 +1134,9 @@ ar71xx_board_detect() {
 	*WHR-HP-G300N)
 		name="whr-hp-g300n"
 		;;
+	*Z1)
+		name="z1"
+		;;
 	*ZBT-WE1526)
 		name="zbt-we1526"
 		;;
diff --git a/target/linux/ar71xx/base-files/lib/preinit/05_set_iface_mac_ar71xx b/target/linux/ar71xx/base-files/lib/preinit/05_set_iface_mac_ar71xx
index 39da309..60e2787 100644
--- a/target/linux/ar71xx/base-files/lib/preinit/05_set_iface_mac_ar71xx
+++ b/target/linux/ar71xx/base-files/lib/preinit/05_set_iface_mac_ar71xx
@@ -49,6 +49,10 @@ preinit_set_mac_address() {
 		wrt160nl)
 			fetch_mac_from_mtd nvram lan_hwaddr wan_hwaddr
 			;;
+		z1)
+			mac_lan=$(mtd_get_mac_binary_ubi board-config 102)
+			[ -n "$mac_lan" ] && ifconfig eth0 hw ether "$mac_lan"
+			;;
 	esac
 }
 
diff --git a/target/linux/ar71xx/base-files/lib/upgrade/merakinand.sh b/target/linux/ar71xx/base-files/lib/upgrade/merakinand.sh
index cc7a86c..78cde20 100644
--- a/target/linux/ar71xx/base-files/lib/upgrade/merakinand.sh
+++ b/target/linux/ar71xx/base-files/lib/upgrade/merakinand.sh
@@ -1,6 +1,6 @@
 #!/bin/sh
 #
-# Copyright (C) 2015 Chris Blake <chrisrblake93@gmail.com>
+# Copyright (C) 2015-2016 Chris Blake <chrisrblake93@gmail.com>
 #
 # Custom upgrade script for Meraki NAND devices (ex. MR18)
 # Based on dir825.sh and stock nand functions
@@ -14,34 +14,52 @@ get_magic_at() {
 	dd bs=1 count=2 skip=$pos if=$mtddev 2>/dev/null | hexdump -v -n 4 -e '1/1 "%02x"'
 }
 
-mr18_is_caldata_valid() {
-	local mtddev=$1
+meraki_is_caldata_valid() {
+	local board=$1
+	local mtddev=$2
 	local magic
 
-	magic=$(get_magic_at $mtddev 4096)
-	[ "$magic" != "0202" ] && return 0
+	case "$board" in
+	"mr18")
+		magic=$(get_magic_at $mtddev 4096)
+		[ "$magic" != "0202" ] && return 0
+
+		magic=$(get_magic_at $mtddev 20480)
+		[ "$magic" != "0202" ] && return 0
 
-	magic=$(get_magic_at $mtddev 20480)
-	[ "$magic" != "0202" ] && return 0
+		magic=$(get_magic_at $mtddev 36864)
+		[ "$magic" != "0202" ] && return 0
+
+		return 1
+		;;
+	"z1")
+		magic=$(get_magic_at $mtddev 4096)
+		[ "$magic" != "0202" ] && return 0
 
-	magic=$(get_magic_at $mtddev 36864)
-	[ "$magic" != "0202" ] && return 0
+		magic=$(get_magic_at $mtddev 86016)
+		[ "$magic" != "a55a" ] && return 0
 
-	return 1
+		return 1
+		;;
+	*)
+		return 1
+		;;
+	esac
 }
 
 merakinand_copy_caldata() {
 	local cal_src=$1
 	local cal_dst=$2
-	local ubidev=$( nand_find_ubi $CI_UBIPART )
+	local ubidev="$(nand_find_ubi $CI_UBIPART)"
 	local board_name="$(cat /tmp/sysinfo/board_name)"
 	local rootfs_size="$(ubinfo /dev/ubi0 -N rootfs_data | grep "Size" | awk '{ print $6 }')"
 
 	# Setup partitions using board name, in case of future platforms
 	case "$board_name" in
-	"mr18")
+	"mr18"|\
+	"z1")
 		# Src is MTD
-		mtd_src=$(find_mtd_chardev $cal_src)
+		mtd_src="$(find_mtd_chardev $cal_src)"
 		[ -n "$mtd_src" ] || {
 			echo "no mtd device found for partition $cal_src"
 			exit 1
@@ -56,12 +74,12 @@ merakinand_copy_caldata() {
 			exit 1
 		}
 
-		mr18_is_caldata_valid "$mtd_src" && {
+		meraki_is_caldata_valid "$board_name" "$mtd_src" && {
 			echo "no valid calibration data found in $cal_src"
 			exit 1
 		}
 
-		mr18_is_caldata_valid "/dev/$mtd_dst" && {
+		meraki_is_caldata_valid "$board_name" "/dev/$mtd_dst" && {
 			echo "Copying calibration data from $cal_src to $cal_dst..."
 			dd if="$mtd_src" of=/tmp/caldata.tmp 2>/dev/null
 			ubiupdatevol "/dev/$mtd_dst" /tmp/caldata.tmp
@@ -89,6 +107,11 @@ merakinand_do_kernel_check() {
 			echo "pass" && return 0
 		}
 		;;
+	"z1")
+		[ "$image_magic_word" == "4d495053" ] && {
+			echo "pass" && return 0
+		}
+		;;
 	esac
 
 	exit 1
@@ -102,7 +125,8 @@ merakinand_do_platform_check() {
 	local kernel_magic="$(merakinand_do_kernel_check $1 $2)"
 
 	case "$board_name" in
-	"mr18")
+	"mr18"|\
+	"z1")
 		[ "$control_length" = 0 -o "$file_type" != "squashfs" -o "$kernel_magic" != "pass" ] && {
 			echo "Invalid sysupgrade file for $board_name"
 			return 1
@@ -128,6 +152,11 @@ merakinand_do_upgrade() {
 		merakinand_copy_caldata "odm-caldata" "caldata"
 		nand_do_upgrade $1
 		;;
+	"z1")
+		# Check and create UBI caldata if it's invalid
+		merakinand_copy_caldata "origcaldata" "caldata"
+		nand_do_upgrade $1
+		;;
 	*)
 		echo "Unsupported device $board_name";
 		exit 1
diff --git a/target/linux/ar71xx/base-files/lib/upgrade/platform.sh b/target/linux/ar71xx/base-files/lib/upgrade/platform.sh
index 716fa52..c78d1fb 100755
--- a/target/linux/ar71xx/base-files/lib/upgrade/platform.sh
+++ b/target/linux/ar71xx/base-files/lib/upgrade/platform.sh
@@ -472,7 +472,8 @@ platform_check_image() {
 		}
 		return 0
 		;;
-	mr18)
+	mr18 | \
+	z1 )
 		merakinand_do_platform_check $board $1
 		return $?;
 		;;
@@ -543,7 +544,8 @@ platform_pre_upgrade() {
 	wndr4300 )
 		nand_do_upgrade "$1"
 		;;
-	mr18)
+	mr18 | \
+	z1 )
 		merakinand_do_upgrade "$1"
 		;;
 	esac