ath79: add support for TP-Link Archer D50 V1

TP-Link Archer D50 v1 is a dual-band AC1200 router + modem.
The router section is based on Qualcomm/Atheros QCA9531 + QCA9882.
The "DSL" section is based on BCM6318 but it's currently not supported.

Internally eth0 is connected to the Broadcom CPU.

Router section - Specification:

CPU: QCA9531 650/600/200 MHz (CPU/DDR/AHB)
RAM: 64 MB (DDR2)
Flash: 8 MB (SPI NOR)
Wifi 2.4GHz: QCA9531 2T2R
Wifi 5GHz: QCA9982 2T2R
4x 10/100 Mbps Ethernet
8x LED, 3x button
UART header on PCB

Known issues:
DSL not working (eth0) (WIP)

UART connection
---------------
J2 HEADER (Qualcomm CPU)
. TX
. RX
. GND
O VCC

J16 HEADER (Broadcom CPU)
O VCC
. GND
. RX
. TX

The following instructions require a connection to the J2 UART header.

Flash instruction under U-Boot, using UART
------------------------------------------
 1. Press any key to stop autobooting and obtain U-Boot CLI access.
 2. Setup ip addresses for U-Boot and your tftp server.
 3. Issue below commands:
	tftpboot 0x81000000 openwrt-ath79-generic-tplink_archer-d50-v1-squashfs-sysupgrade.bin
	erase 0x9f020000 +$filesize
	cp.b 0x81000000 0x9f020000 $filesize
	reset

Initramfs instruction under U-Boot for testing, using UART
----------------------------------------------------------
 1. Press any key to stop autobooting and obtain U-Boot CLI access.
 2. Setup ip addresses for U-Boot and your tftp server.
 3. Issue below commands:
	tftpboot 0x81000000 openwrt-ath79-generic-tplink_archer-d50-v1-initramfs-kernel.bin
	bootm 0x81000000

Restore the original firmware
-----------------------------
 0. Backup every partition using the OpenWrt web interface
 1. Download the OEM firmware from the TP-Link website
 2. Extract the bin file in a folder (eg. Archer_D50v1_0.8.0_1.3_up_boot(170223)_full_2017-02-24_09.37.45.bin)
 3. Remove the U-Boot and the Broadcom image part from the file.
    Issue the following command:
	dd if="Archer_D50v1_0.8.0_1.3_up_boot(170223)_full_2017-02-24_09.37.45.bin" of="Archer_D50v1_0.8.0_1.3_up_boot(170223)_full_2017-02-24_09.37.45.bin.mod" skip=257 bs=512 count=15616
 4. Double check the .mod file size. It must be 7995392 bytes.
 5. Flash it using the OpenWrt web interface. Force the update if needed.
    WARNING: Remember to NOT keep settings.

 5b. (Alternative to 5.) Flash it using the U-Boot and UART connection.
     Issue below commands in the U-Boot:
        tftpboot 0x81000000 Archer_D50v1_0.8.0_1.3_up_boot(170223)_full_2017-02-24_09.37.45.bin.mod
        erase 0x9f020000 +$filesize
        cp.b 0x81000000 0x9f020000 $filesize
        reset

Signed-off-by: Davide Fioravanti <pantanastyle@gmail.com>
Signed-off-by: Christian Lamparter <chunkeey@gmail.com> [removed
default-state = "off", it's already the default, added pcie node,
fixed typo]

1 files changed, 5 insertions, 0 deletions

diff --git a/target/linux/ath79/base-files/etc/board.d/01_leds b/target/linux/ath79/base-files/etc/board.d/01_leds
index 9bcfbb2b0a..69e26a4773 100755
--- a/target/linux/ath79/base-files/etc/board.d/01_leds
+++ b/target/linux/ath79/base-files/etc/board.d/01_leds
@@ -136,6 +136,11 @@ tplink,cpe210-v3)
 	ucidef_set_led_rssi "rssimediumhigh" "RSSIMEDIUMHIGH" "tp-link:green:link3" "wlan0" "60" "100"
 	ucidef_set_led_rssi "rssihigh" "RSSIHIGH" "tp-link:green:link4" "wlan0" "80" "100"
 	;;
+tplink,archer-d50-v1)
+	ucidef_set_led_switch "lan" "LAN" "tp-link:white:lan" "switch0" "0x1E"
+	ucidef_set_led_netdev "wan_data" "WAN Data" "tp-link:white:internet" "eth1.2" "tx rx"
+	ucidef_set_led_netdev "wan_link" "WAN Link" "tp-link:white:wan" "eth1.2" "link"
+	;;
 tplink,re450-v2)
 	ucidef_set_led_netdev "lan_data" "LAN Data" "tp-link:green:lan_data" "eth0" "tx rx"
 	ucidef_set_led_netdev "lan_link" "LAN Link" "tp-link:green:lan_link" "eth0" "link"