Add RTL8812EU driver & wifibroadcast script support for FPV firmware (#1393)

Co-authored-by: Dmitry Ilyin <dima@doty.ru>

general/package/Config.in

@@ -78,6 +78,7 @@ source "$BR2_EXTERNAL_GENERAL_PATH/package/osd-openipc/Config.in"
 source "$BR2_EXTERNAL_GENERAL_PATH/package/quirc-openipc/Config.in"
 source "$BR2_EXTERNAL_GENERAL_PATH/package/rcjoystick/Config.in"
 source "$BR2_EXTERNAL_GENERAL_PATH/package/rockchip-osdrv-rv11xx/Config.in"
+source "$BR2_EXTERNAL_GENERAL_PATH/package/rtl88x2eu-openipc/Config.in"
 source "$BR2_EXTERNAL_GENERAL_PATH/package/rtl8812au/Config.in"
 source "$BR2_EXTERNAL_GENERAL_PATH/package/rtl8188eus-openipc/Config.in"
 source "$BR2_EXTERNAL_GENERAL_PATH/package/rtl8188fu-openipc/Config.in"

general/package/rtl88x2eu-openipc/0001-fix-extra-cflags.patch

@@ -0,0 +1,11 @@
+--- a/Makefile	
++++ b/Makefile	
+@@ -1,6 +1,7 @@
+ EXTRA_CFLAGS += $(USER_EXTRA_CFLAGS)
+-EXTRA_CFLAGS += -O1
++EXTRA_CFLAGS += -Os
+ #EXTRA_CFLAGS += -O3
++EXTRA_CFLAGS += -DCONFIG_LITTLE_ENDIAN -DCONFIG_IOCTL_CFG80211 -DRTW_USE_CFG80211_STA_EVENT
+ #EXTRA_CFLAGS += -Wall
+ #EXTRA_CFLAGS += -Wextra
+ #EXTRA_CFLAGS += -Werror

general/package/rtl88x2eu-openipc/Config.in

@@ -0,0 +1,16 @@
+config BR2_PACKAGE_RTL88X2EU_OPENIPC
+	bool "rtl88x2eu-openipc"
+	depends on BR2_LINUX_KERNEL
+	help
+	  A standalone driver for the RTL88X2EU Dual Band
+	  USB Wi-Fi adapter.
+
+	  Make sure your target kernel has the CONFIG_WIRELESS_EXT
+	  config option enabled.
+
+	  Note: this package needs a firmware loading mechanism to
+	  load the binary blob for the chip to work.
+
+
+comment "rtl88x2eu needs a Linux kernel to be built"
+	depends on !BR2_LINUX_KERNEL

general/package/rtl88x2eu-openipc/rtl88x2eu-openipc.mk

@@ -0,0 +1,24 @@
+################################################################################
+#
+# rtl88x2eu-openipc
+#
+################################################################################
+
+ifeq ($(LOCAL_DOWNLOAD),y)
+RTL88X2EU_OPENIPC_SITE_METHOD = git
+RTL88X2EU_OPENIPC_SITE = https://github.com/libc0607/rtl88x2eu-20230815
+RTL88X2EU_OPENIPC_VERSION = $(shell git ls-remote $(RTL88X2EU_OPENIPC_SITE) HEAD | head -1 | cut -f1)
+else
+RTL88X2EU_OPENIPC_SITE = https://github.com/libc0607/rtl88x2eu-20230815/archive
+RTL88X2EU_OPENIPC_SOURCE = master.tar.gz
+endif
+
+RTL88X2EU_OPENIPC_LICENSE = GPL-2.0
+RTL88X2EU_OPENIPC_LICENSE_FILES = COPYING
+
+RTL88X2EU_OPENIPC_MODULE_MAKE_OPTS = CONFIG_RTL8822EU=m \
+	KVER=$(LINUX_VERSION_PROBED) \
+	KSRC=$(LINUX_DIR)
+
+$(eval $(kernel-module))
+$(eval $(generic-package))

general/package/wifibroadcast/files/wifibroadcast

@@ -30,6 +30,10 @@ set_mcs() {
 	fi
 }
 
+# "0bda:8813" -> (8814) -> 8814au
+# "0846:9052" -> (8811) -> 8821au
+# "0bda:a81a" ->           88x2eu
+
 detect_wifi_card() {
 	devices=$(lsusb | cut -d ' ' -f6 | sort | uniq)
 	for card in $devices; do
@@ -39,6 +43,11 @@ detect_wifi_card() {
 				modprobe 88XXau rtw_tx_pwr_idx_override="$driver_txpower_override"
 				;;
 
+			"0bda:a81a")
+				driver="realtek_8812eu"
+				modprobe 8812eu rtw_regd_src=1 rtw_tx_pwr_by_rate=0 rtw_tx_pwr_lmt_enable=0
+				;;
+
 			"0cf3:9271" | "040d:3801")
 				driver="atheros"
 				if ! [ "$unit" = "gs" ]; then
@@ -78,6 +87,10 @@ load_interface() {
 	if [ "$driver" = "realtek" ]; then
 		ifconfig "$wlan" up
 		iwconfig "$wlan" mode monitor
+	elif [ ${driver} = "realtek_8812eu" ]; then
+		ifconfig ${wlan} up
+		iwconfig ${wlan} mode monitor
+		iw dev ${wlan} set txpower fixed $(expr ${driver_txpower_override} * 50)
 	elif [ "$driver" = "atheros" ]; then
 		iwconfig "$wlan" mode monitor
 		ifconfig "$wlan" up