initial upload

8821cu.conf

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+# /etc/modprobe.d/8821cu.conf
+#
+# Purpose: Allow easy access to specific driver options.
+#
+# Edit the following line to change, add or delete options:
+options 8821cu rtw_drv_log_level=0 rtw_led_ctrl=1 rtw_vht_enable=1 rtw_power_mgnt=1 rtw_beamform_cap=0 rtw_dfs_region_domain=0
+#
+# After editing is complete, save this file (if using nano: Ctrl+X, Y, Enter)
+# and reboot to activate the changes.
+#
+# Documentation:
+#
+# -----
+#
+# Log options: ( rtw_drv_log_level )
+#
+# 0 = NONE (default)
+# 1 = ALWAYS
+# 2 = ERROR
+# 3 = WARNING
+# 4 = INFO
+# 5 = DEBUG
+# 6 = MAX
+#
+# Note: You can save a log file that only includes RTW log entries by running
+# the following in a terminal:
+#
+# sudo ./save-log.sh
+#
+# Note: The name of the log file will be ```rtw.log```.
+#
+# -----
+#
+# LED options: ( rtw_led_ctrl )
+#
+# 0 = Always off
+# 1 = Normal blink (default)
+# 2 = Always on
+#
+# -----
+#
+# VHT options: ( rtw_vht_enable )
+#
+# 0 = Disable
+# 1 = Enable (default)
+# 2 = Force auto enable (use only for 5 GHz AP mode)
+#
+# Notes:
+# - A non-default setting can degrade performance greatly in managed mode.
+# - Option 2 allows 80 MHz channel width for 5GHz AP mode, such as when
+# you are using hostapd.
+#
+# -----
+#
+# Power options: ( rtw_power_mgnt )
+#
+# 0 = Disable power saving
+# 1 = Power saving on, minPS (default)
+# 2 = Power saving on, maxPS (not recommended for AP mode)
+#
+# -----
+#
+# Beamforming options: ( rtw_beamform_cap )
+#
+# 0 = Disable (default)
+# 1 = SU Beamformer
+# 2 = SU Beamformee
+# 10= SU Beamformee and MU Beamformee
+#
+# Note: MU Beamformer is not supported.
+#
+# -----
+#
+# DFS Options ( rtw_dfs_region_domain )
+#
+# 0 = NONE (default)
+# 1 = FCC
+# 2 = MKK
+# 3 = ETSI
+#
+# Notes:
+# - Activates DFS channels in AP mode.
+# - DFS FCC 80 MHz channels for hostapd: 52(58), 100(106), 116(122) and 132(138)
+# - For more information: https://en.wikipedia.org/wiki/List_of_WLAN_channels
+#
+# Note: An AP needs to listen on a DFS channel for a period of 60 seconds
+# before transmitting on the channel. If any radar pulses are detected,
+# the AP cannot use that channel and will have to try a different channel.
+#
+# -----
+#
+# Select P2P interface in concurrent mode: ( rtw_sel_p2p_iface )
+#
+# 0 = Sets interface 0 to be p2p interface
+# 1 = Sets interface 1 to be p2p interface (default) 
+#
+# -----
+#
+# To see all options that are available:
+#
+# $ ls /sys/module/8821cu/parameters/
+#
+# -----
+#
+# To see the values that are in use:
+#
+# $ grep [[:alnum:]] /sys/module/8821cu/parameters/*
+#
+# -----
+#
+# hostapd setup information for rtl8821cu
+# Note: The best settings can vary but the following may be a good place to start.
+#
+# /etc/modprobe.d/8821cu.conf
+# options 8821cu rtw_drv_log_level=0 rtw_led_ctrl=0 rtw_vht_enable=2 rtw_power_mgnt=1 rtw_beamform_cap=0 rtw_dfs_region_domain=1
+#
+# Note: The best setting for `rtw_dfs_region_domain=` will depend on your location.
+#
+# /etc/hostapd/hostapd.conf
+#
+# hw ht capab: 0x862
+# ht_capab=[HT40+][HT40-][SHORT-GI-20][SHORT-GI-40][MAX-AMSDU-7935]
+#
+# hw vht capab: 0x03c00022
+# vht_capab=[MAX-MPDU-11454][SHORT-GI-80][HTC-VHT][MAX-A-MPDU-LEN-EXP7]
+#
+# -----
+
+
+
+
+

ARM64_RPI.sh

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+#!/bin/bash
+#
+# Purpose: Change settings in the Makefile to support compiling for Raspberry Pi OS (64 bit).
+#
+# To make this file executable:
+#
+# $ chmod +x raspiOS-64.sh
+#
+# To execute this file:
+#
+# $ ./raspiOS-64.sh
+
+sed -i 's/CONFIG_PLATFORM_I386_PC = y/CONFIG_PLATFORM_I386_PC = n/g' Makefile
+RESULT=$?
+
+if [[ "$RESULT" != "0" ]]; then
+ echo "An error occurred and I386 support was not turned off in Makefile."
+ exit 1
+else
+ echo "I386 support was turned off in Makefile as planned."
+fi
+
+sed -i 's/CONFIG_PLATFORM_ARM64_RPI = n/CONFIG_PLATFORM_ARM64_RPI = y/g' Makefile
+RESULT=$?
+
+if [[ "$RESULT" != "0" ]]; then
+ echo "An error occurred and Raspberry Pi OS (64 bit) support was not turned on in Makefile."
+ exit 1
+else
+ echo "Raspberry Pi OS (64 bit) support was turned on in Makefile as planned."
+ exit 0
+fi

ARM_RPI.sh

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+#!/bin/bash
+#
+# Purpose: Change settings in the Makefile to support compiling for Raspberry Pi OS (32 bit).
+#
+# To make this file executable (if necessary):
+#
+# $ chmod +x raspiOS-32.sh
+#
+# To execute this file:
+#
+# $ ./raspiOS-32.sh
+
+# getconf LONG_BIT (need to work on this)
+
+sed -i 's/CONFIG_PLATFORM_I386_PC = y/CONFIG_PLATFORM_I386_PC = n/g' Makefile
+RESULT=$?
+
+if [[ "$RESULT" != "0" ]]; then
+ echo "An error occurred and I386 support was not turned off in Makefile."
+ exit 1
+else
+ echo "I386 support was turned off in Makefile as planned."
+fi
+
+sed -i 's/CONFIG_PLATFORM_ARM_RPI = n/CONFIG_PLATFORM_ARM_RPI = y/g' Makefile
+RESULT=$?
+
+if [[ "$RESULT" != "0" ]]; then
+ echo "An error occurred and Raspberry Pi OS (32 bit) support was not turned on in Makefile."
+ exit 1
+else
+ echo "Raspberry Pi OS (32 bit) support was turned on in Makefile as planned."
+ exit 0
+fi

Kconfig

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+config RTL8821CU
+ tristate "Realtek 8821C USB WiFi"
+ depends on USB
+ select WIRELESS_EXT
+ help
+ Help message of RTL8821CU
+

LICENSE

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+/******************************************************************************
+ *
+ * Copyright(c) 2007 - 2021 Realtek Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ *****************************************************************************/