rtl8821au: new package

This patch adds the rtl8821au wifi driver. The driver is sourced from
ulli-kroll's work on GitHub, which includes various fixes and better LED
handling. Currently USB3 support is broken in this driver - it will
only connect to the EHCI controller in a USB3 port.

Signed-off-by: Christian Stewart <christian@paral.in>
Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/Config.in

@@ -404,6 +404,7 @@ endif
 	source "package/read-edid/Config.in"
 	source "package/rng-tools/Config.in"
 	source "package/rpi-userland/Config.in"
+	source "package/rtl8821au/Config.in"
 	source "package/sane-backends/Config.in"
 	source "package/sdparm/Config.in"
 	source "package/setserial/Config.in"

package/rtl8821au/0001-disable-default-debug.patch

@@ -0,0 +1,24 @@
+Comment out the hardcoded debug defines. If extra debug is needed, we can add it
+as a define in the make flags.
+
+Signed-off-by: Christian Stewart <christian@paral.in>
+
+diff --git a/include/autoconf.h b/include/autoconf.h
+--- a/include/autoconf.h
++++ b/include/autoconf.h
+@@ -130,12 +130,12 @@
+ /*
+  * Debug Related Config
+  */
+-#define DBG	1
++//#define DBG	1
+ 
+-#define CONFIG_DEBUG /* DBG_871X, etc... */
++//#define CONFIG_DEBUG /* DBG_871X, etc... */
+ //#define CONFIG_DEBUG_RTL871X /* RT_TRACE, RT_PRINT_DATA, _func_enter_, _func_exit_ */
+ 
+-#define CONFIG_PROC_DEBUG
++//#define CONFIG_PROC_DEBUG
+ 
+ 
+ //#define DBG_TX

package/rtl8821au/Config.in

@@ -0,0 +1,10 @@
+comment "rtl8821au needs a Linux kernel to be built"
+	depends on !BR2_LINUX_KERNEL
+
+config BR2_PACKAGE_RTL8821AU
+	bool "rtl8821au"
+	depends on BR2_LINUX_KERNEL
+	help
+	  rtl8821au wifi driver
+
+	  https://github.com/paralin/rtl8821au

package/rtl8821au/rtl8821au.mk

@@ -0,0 +1,25 @@
+################################################################################
+#
+# rtl8821au
+#
+################################################################################
+
+RTL8821AU_VERSION = f58e4a7fb27551bdbb4aee9db6086dd6ad996c8d
+RTL8821AU_SITE = $(call github,ulli-kroll,rtl8821au,$(RTL8821AU_VERSION))
+RTL8821AU_LICENSE = GPLv2, proprietary (rtl8821au.bin firmware)
+RTL8821AU_LICENSE_FILES = COPYING
+
+RTL8821AU_MODULE_MAKE_OPTS = \
+	CONFIG_RTL8812AU_8821AU=m \
+	KVER=$(LINUX_VERSION_PROBED) \
+	USER_EXTRA_CFLAGS=-DCONFIG_$(call qstrip,$(BR2_ENDIAN))_ENDIAN
+
+define RTL8821AU_FIRMWARE_INSTALL
+	mkdir -p $(TARGET_DIR)/lib/firmware/rtlwifi/
+	$(INSTALL) -D -m 0644 $(@D)/firmware/* $(TARGET_DIR)/lib/firmware/rtlwifi/
+endef
+
+RTL8821AU_POST_INSTALL_TARGET_HOOKS += RTL8821AU_FIRMWARE_INSTALL
+
+$(eval $(kernel-module))
+$(eval $(generic-package))