ar71xx: add support for TP-LINK Archer C7 v4

TP-Link Archer C7 v4 is a dual-band AC1750 router, based on Qualcomm/Atheros
QCA9561+QCA9888.

Specification:

- 775/650/258 MHz (CPU/DDR/AHB)
- 128 MB of RAM (DDR2)
- 16 MB of FLASH (SPI NOR)
- 3T3R 2.4 GHz
- 3T3R 5 GHz
- 5x 10/100/1000 Mbps Ethernet
- 7x LED, 2x button
- UART header on PCB

Flash instruction:
1. Upload lede-ar71xx-generic-archer-c7-v4-squashfs-factory.bin via Web interface

Flash instruction using TFTP recovery:
1. Set PC to fixed ip address 192.168.0.66
2. Download lede-ar71xx-generic-archer-c7-v4-squashfs-factory.bin
and rename it to ArcherC7v4_tp_recovery.bin
3. Start a tftp server with the file tp_recovery.bin in its root directory
4. Turn off the router
5. Press and hold Reset button
6. Turn on router with the reset button pressed and wait ~15 seconds
7. Release the reset button and after a short time
the firmware should be transferred from the tftp server
8. Wait ~30 second to complete recovery.

Flash instruction under U-Boot, using UART:

1. tftp 0x81000000 lede-ar71xx-...-sysupgrade.bin
2. erase 0x9f040000 +$filesize
3. cp.b $fileaddr 0x9f040000 $filesize
4. reset

Signed-off-by: Felix Fietkau <nbd@nbd.name>

4 files changed, 11 insertions, 1 deletions

diff --git a/target/linux/ar71xx/base-files/etc/board.d/01_leds b/target/linux/ar71xx/base-files/etc/board.d/01_leds
index 0694fe954f..27e6c8a033 100755
--- a/target/linux/ar71xx/base-files/etc/board.d/01_leds
+++ b/target/linux/ar71xx/base-files/etc/board.d/01_leds
@@ -58,7 +58,8 @@ sc1750|\
 sc450)
 	ucidef_set_led_wlan "wlan" "WLAN" "$board:green:wlan" "phy0tpt"
 	;;
-archer-c25-v1)
+archer-c25-v1|\
+archer-c7-v4)
 	ucidef_set_led_netdev "wan" "WAN" "$board:green:wan" "eth0"
 	ucidef_set_led_wlan "wlan" "WLAN" "$board:green:wlan2g" "phy1tpt"
 	ucidef_set_led_wlan "wlan5g" "WLAN5G" "$board:green:wlan5g" "phy0tpt"
@@ -66,6 +67,12 @@ archer-c25-v1)
 	ucidef_set_led_switch "lan2" "LAN2" "$board:green:lan2" "switch0" "0x08"
 	ucidef_set_led_switch "lan3" "LAN3" "$board:green:lan3" "switch0" "0x04"
 	ucidef_set_led_switch "lan4" "LAN4" "$board:green:lan4" "switch0" "0x02"
+	case "$board" in
+		archer-c7-v4)
+			ucidef_set_led_usbdev "usb1" "USB1" "$board:green:usb1" "1-1"
+			ucidef_set_led_usbdev "usb2" "USB2" "$board:green:usb2" "2-1"
+		;;
+	esac
 	;;
 archer-c58-v1|\
 archer-c59-v1|\
diff --git a/target/linux/ar71xx/base-files/etc/board.d/02_network b/target/linux/ar71xx/base-files/etc/board.d/02_network
index 46b217136d..a75f5fe29f 100755
--- a/target/linux/ar71xx/base-files/etc/board.d/02_network
+++ b/target/linux/ar71xx/base-files/etc/board.d/02_network
@@ -428,6 +428,7 @@ ar71xx_setup_interfaces()
 		ucidef_add_switch "switch0" \
 			"0@eth1" "1:lan:4" "2:lan:1" "3:lan:2" "4:lan:3"
 		;;
+	archer-c7-v4|\
 	tl-wdr4300|\
 	tl-wr1041n-v2)
 		ucidef_add_switch "switch0" \
diff --git a/target/linux/ar71xx/base-files/etc/diag.sh b/target/linux/ar71xx/base-files/etc/diag.sh
index 7fa4ff0bcc..f4ad435ea7 100644
--- a/target/linux/ar71xx/base-files/etc/diag.sh
+++ b/target/linux/ar71xx/base-files/etc/diag.sh
@@ -58,6 +58,7 @@ get_status_led() {
 	archer-c58-v1|\
 	archer-c59-v1|\
 	archer-c60-v1|\
+	archer-c7-v4|\
 	fritz300e|\
 	gl-usb150|\
 	mr12|\
diff --git a/target/linux/ar71xx/base-files/etc/hotplug.d/firmware/11-ath10k-caldata b/target/linux/ar71xx/base-files/etc/hotplug.d/firmware/11-ath10k-caldata
index 9a5f82b7cd..66796593c0 100644
--- a/target/linux/ar71xx/base-files/etc/hotplug.d/firmware/11-ath10k-caldata
+++ b/target/linux/ar71xx/base-files/etc/hotplug.d/firmware/11-ath10k-caldata
@@ -54,6 +54,7 @@ case "$FIRMWARE" in
 		ath10kcal_extract "ART" 20480 2116
 		ath10kcal_patch_mac $(macaddr_add $(cat /sys/class/net/eth0/address) +16)
 		;;
+	archer-c7-v4|\
 	archer-c25-v1|\
 	archer-c59-v1|\
 	archer-c60-v1|\