ipq40xx: add Cisco Meraki MR33 Support

This patch adds support for Cisco Meraki MR33

hardware highlights:

SOC:	IPQ4029 Quad-Core ARMv7 Processor rev 5 (v7l) Cortex-A7
DRAM:	256 MiB DDR3L-1600 @ 627 MHz Micron MT41K128M16JT-125IT
NAND:	128 MiB SLC NAND Spansion S34ML01G200TFV00 (106 MiB usable)
ETH:	Qualcomm Atheros AR8035 Gigabit PHY (1 x LAN/WAN) + PoE
WLAN1:	QCA9887 (168c:0050) PCIe 1x1:1 802.11abgn ac Dualband VHT80
WLAN2:	Qualcomm Atheros QCA4029 2.4GHz 802.11bgn 2:2x2
WLAN3:	Qualcomm Atheros QCA4029 5GHz 802.11a/n/ac 2:2x2 VHT80
LEDS:	1 x Programmable RGB+White Status LED (driven by Ti LP5562 on i2c-1)
	1 x Orange LED Fault Indicator (shared with LP5562)
	2 x LAN Activity / Speed LEDs (On the RJ45 Port)
BUTTON:	one Reset button
MISC:	Bluetooth LE Ti cc2650 PG2.3 4x4mm - BL_CONFIG at 0x0001FFD8
	AT24C64 8KiB EEPROM
	Kensington Lock

Serial:
	WARNING: The serial port needs a TTL/RS-232 3V3 level converter!
	The Serial setting is 115200-8-N-1. The board has a populated
	1x4 0.1" header with half-height/low profile pins.
	The pinout is: VCC (little white arrow), RX, TX, GND.

Flashing needs a serial adaptor, as well as patched ubootwrite utility
(needs Little-Endian support). And a modified u-boot (enabled Ethernet).
Meraki's original u-boot source can be found in:
<https://github.com/riptidewave93/meraki-uboot/tree/mr33-20170427>

Add images to do an installation via bootloader:
 0. open up the MR33 and connect the serial console.

 1. start the 2nd stage bootloader transfer from client pc:

  # ubootwrite.py --write=mr33-uboot.bin
  (The ubootwrite tool will interrupt the boot-process and hence
   it needs to listen for cues. If the connection is bad (due to
   the low-profile pins), the tool can fail multiple times and in
   weird ways. If you are not sure, just use a terminal program
   and see what the device is doing there.

 2. power on the MR33 (with ethernet + serial cables attached)
    Warning: Make sure you do this in a private LAN that has
    no connection to the internet.

 - let it upload the u-boot this can take 250-300 seconds -

 3. use a tftp client (in binary mode!) on your PC to upload the sysupgrade.bin
    (the u-boot is listening on 192.168.1.1)
    # tftp 192.168.1.1
    binary
    put openwrt-ipq40xx-meraki_mr33-squashfs-sysupgrade.bin

 4. wait for it to reboot

 5. connect to your MR33 via ssh on 192.168.1.1

For more detailed instructions, please take a look at the:
"Flashing Instructions for the MR33" PDF. This can be found
on the wiki: <https://openwrt.org/toh/meraki/mr33>
(A link to the mr33-uboot.bin + the modified ubootwrite is
also there)

Thanks to Jerome C. for sending an MR33 to Chris.

Signed-off-by: Chris Blake <chrisrblake93@gmail.com>
Signed-off-by: Mathias Kresin <dev@kresin.me>
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>

5 files changed, 102 insertions, 0 deletions

diff --git a/target/linux/ipq40xx/base-files/etc/board.d/01_leds b/target/linux/ipq40xx/base-files/etc/board.d/01_leds
index 6a493be3ec..f1f49abb2e 100755
--- a/target/linux/ipq40xx/base-files/etc/board.d/01_leds
+++ b/target/linux/ipq40xx/base-files/etc/board.d/01_leds
@@ -26,6 +26,9 @@ avm,fritzbox-4040)
 glinet,gl-b1300)
 	ucidef_set_led_wlan "wlan" "WLAN" "${boardname}:green:wlan" "phy0tpt"
 	;;
+meraki,mr33)
+	ucidef_set_interface_lan "eth0"
+	;;
 *)
 	;;
 esac
diff --git a/target/linux/ipq40xx/base-files/etc/board.d/02_network b/target/linux/ipq40xx/base-files/etc/board.d/02_network
index 8f8d67db32..d25a039f2d 100755
--- a/target/linux/ipq40xx/base-files/etc/board.d/02_network
+++ b/target/linux/ipq40xx/base-files/etc/board.d/02_network
@@ -35,6 +35,10 @@ glinet,gl-b1300)
 openmesh,a42)
 	ucidef_set_interfaces_lan_wan "eth1" "eth0"
 	;;
+
+meraki,mr33)
+	ucidef_set_interface_lan "eth0"
+	;;
 *)
 	echo "Unsupported hardware. Network interfaces not intialized"
 	;;
diff --git a/target/linux/ipq40xx/base-files/etc/hotplug.d/firmware/11-ath10k-caldata b/target/linux/ipq40xx/base-files/etc/hotplug.d/firmware/11-ath10k-caldata
index bc64d5b8ab..4322c4f3fa 100644
--- a/target/linux/ipq40xx/base-files/etc/hotplug.d/firmware/11-ath10k-caldata
+++ b/target/linux/ipq40xx/base-files/etc/hotplug.d/firmware/11-ath10k-caldata
@@ -1,5 +1,21 @@
 #!/bin/sh
 
+# xor multiple hex values of the same length
+xor() {
+	local val
+	local ret="0x$1"
+	local retlen=${#1}
+
+	shift
+	while [ -n "$1" ]; do
+		val="0x$1"
+		ret=$((ret ^ val))
+		shift
+	done
+
+	printf "%0${retlen}x" "$ret"
+}
+
 ath10kcal_die() {
 	echo "ath10cal: " "$*"
 	exit 1
@@ -37,6 +53,45 @@ ath10kcal_ubi_extract() {
 		ath10kcal_die "failed to extract from $ubi"
 }
 
+ath10kcal_patch_mac() {
+	local mac=$1
+
+	[ -z "$mac" ] && return
+
+	macaddr_2bin $mac | dd of=/lib/firmware/$FIRMWARE conv=notrunc bs=1 seek=6 count=6
+}
+
+ath10kcal_patch_mac_crc() {
+	local mac=$1
+	local mac_offset=6
+	local chksum_offset=2
+	local xor_mac
+	local xor_fw_mac
+	local xor_fw_chksum
+
+	xor_fw_mac=$(hexdump -v -n 6 -s $mac_offset -e '/1 "%02x"' /lib/firmware/$FIRMWARE)
+	xor_fw_mac="${xor_fw_mac:0:4} ${xor_fw_mac:4:4} ${xor_fw_mac:8:4}"
+
+	ath10kcal_patch_mac "$mac" && {
+		xor_mac=${mac//:/}
+		xor_mac="${xor_mac:0:4} ${xor_mac:4:4} ${xor_mac:8:4}"
+
+		xor_fw_chksum=$(hexdump -v -n 2 -s $chksum_offset -e '/1 "%02x"' /lib/firmware/$FIRMWARE)
+		xor_fw_chksum=$(xor $xor_fw_chksum $xor_fw_mac $xor_mac)
+
+		printf "%b" "\x${xor_fw_chksum:0:2}\x${xor_fw_chksum:2:2}" | \
+			dd of=/lib/firmware/$FIRMWARE conv=notrunc bs=1 seek=$chksum_offset count=2
+	}
+}
+
+ath10kcal_is_caldata_valid() {
+	local expected="$1"
+
+	magic=$(hexdump -v -n 2 -e '1/1 "%02x"' /lib/firmware/$FIRMWARE)
+	[[ "$magic" == "$expected" ]]
+	return $?
+}
+
 [ -e /lib/firmware/$FIRMWARE ] && exit 0
 
 . /lib/functions.sh
@@ -46,6 +101,15 @@ board=$(board_name)
 
 
 case "$FIRMWARE" in
+"ath10k/cal-pci-0000:01:00.0.bin")
+	case "$board" in
+	meraki,mr33)
+		ath10kcal_ubi_extract "ART" 36864 2116
+		ath10kcal_is_caldata_valid "4408" || ath10kcal_extract "ART" 36864 2116
+		ath10kcal_patch_mac $(macaddr_add $(get_mac_binary "/sys/bus/i2c/devices/0-0050/eeprom" 102) +1)
+		;;
+	esac
+	;;
 "ath10k/pre-cal-ahb-a000000.wifi.bin")
 	case "$board" in
 	asus,rt-ac58u)
@@ -59,6 +123,11 @@ case "$FIRMWARE" in
 	qcom,ap-dk01.1-c1)
 		ath10kcal_extract "ART" 4096 12064
 		;;
+	meraki,mr33)
+		ath10kcal_ubi_extract "ART" 4096 12064
+		ath10kcal_is_caldata_valid "202f" || ath10kcal_extract "ART" 4096 12064
+		ath10kcal_patch_mac_crc $(macaddr_add $(get_mac_binary "/sys/bus/i2c/devices/0-0050/eeprom" 102) +2)
+		;;
 	openmesh,a42)
 		ath10kcal_extract "0:ART" 4096 12064
 		;;
@@ -77,6 +146,11 @@ case "$FIRMWARE" in
 	qcom,ap-dk01.1-c1)
 		ath10kcal_extract "ART" 20480 12064
 		;;
+	meraki,mr33)
+		ath10kcal_ubi_extract "ART" 20480 12064
+		ath10kcal_is_caldata_valid "202f" || ath10kcal_extract "ART" 20480 12064
+		ath10kcal_patch_mac_crc $(macaddr_add $(get_mac_binary "/sys/bus/i2c/devices/0-0050/eeprom" 102) +3)
+		;;
 	openmesh,a42)
 		ath10kcal_extract "0:ART" 20480 12064
 		;;
diff --git a/target/linux/ipq40xx/base-files/lib/preinit/05_set_iface_mac_ipq40xx.sh b/target/linux/ipq40xx/base-files/lib/preinit/05_set_iface_mac_ipq40xx.sh
new file mode 100644
index 0000000000..1acd7366c8
--- /dev/null
+++ b/target/linux/ipq40xx/base-files/lib/preinit/05_set_iface_mac_ipq40xx.sh
@@ -0,0 +1,14 @@
+#!/bin/sh
+
+. /lib/functions.sh
+
+preinit_set_mac_address() {
+	case $(board_name) in
+	meraki,mr33)
+		mac_lan=$(get_mac_binary "/sys/bus/i2c/devices/0-0050/eeprom" 102)
+		[ -n "$mac_lan" ] && ip link set dev eth0 address "$mac_lan"
+		;;
+	esac
+}
+
+boot_hook_add preinit_main preinit_set_mac_address
diff --git a/target/linux/ipq40xx/base-files/lib/upgrade/platform.sh b/target/linux/ipq40xx/base-files/lib/upgrade/platform.sh
index 261c468813..52aa2321e3 100644
--- a/target/linux/ipq40xx/base-files/lib/upgrade/platform.sh
+++ b/target/linux/ipq40xx/base-files/lib/upgrade/platform.sh
@@ -40,6 +40,10 @@ platform_do_upgrade() {
 		PART_NAME="inactive"
 		platform_do_upgrade_openmesh "$ARGV"
 		;;
+	meraki,mr33)
+		CI_KERNPART="part.safe"
+		nand_do_upgrade "$1"
+		;;
 	*)
 		default_do_upgrade "$ARGV"
 		;;
@@ -52,6 +56,9 @@ platform_nand_pre_upgrade() {
 		CI_UBIPART="UBI_DEV"
 		CI_KERNPART="linux"
 		;;
+	meraki,mr33)
+		CI_KERNPART="part.safe"
+		;;
 	esac
 }