rtl8821cu: add realtek wlan driver

  realtek has released a third different usb ac wlan chipset.

Signed-off-by: Arne Fitzenreiter <arne_f@ipfire.org>
---
 lfs/rtl8821cu | 95 +++++++++++++++++++++++++++++++++++++++++++++++++++
 make.sh       |  1 +
 2 files changed, 96 insertions(+)
 create mode 100644 lfs/rtl8821cu
  

Hello,

Is there any chance that we will see this and the others ever to be upstreamed into the kernel?

I find this rather annoying to have out-of-tree modules which presumably are not upstreamed because code quality is sub-par.

-Michael

Reviewed-by: Michael Tremer <michael.tremer@ipfire.org>

> On 3 Aug 2022, at 16:07, Arne Fitzenreiter <arne_f@ipfire.org> wrote:
> 
> realtek has released a third different usb ac wlan chipset.
> 
> Signed-off-by: Arne Fitzenreiter <arne_f@ipfire.org>
> ---
> lfs/rtl8821cu | 95 +++++++++++++++++++++++++++++++++++++++++++++++++++
> make.sh       |  1 +
> 2 files changed, 96 insertions(+)
> create mode 100644 lfs/rtl8821cu
> 
> diff --git a/lfs/rtl8821cu b/lfs/rtl8821cu
> new file mode 100644
> index 000000000..b5a0357bc
> --- /dev/null
> +++ b/lfs/rtl8821cu
> @@ -0,0 +1,95 @@
> +###############################################################################
> +#                                                                             #
> +# IPFire.org - A linux based firewall                                         #
> +# Copyright (C) 2007-2022  IPFire Team <info@ipfire.org>                      #
> +#                                                                             #
> +# This program is free software: you can redistribute it and/or modify        #
> +# it under the terms of the GNU General Public License as published by        #
> +# the Free Software Foundation, either version 3 of the License, or           #
> +# (at your option) any later version.                                         #
> +#                                                                             #
> +# 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.                                #
> +#                                                                             #
> +# You should have received a copy of the GNU General Public License           #
> +# along with this program.  If not, see <http://www.gnu.org/licenses/>.       #
> +#                                                                             #
> +###############################################################################
> +
> +###############################################################################
> +# Definitions
> +###############################################################################
> +
> +include Config
> +
> +VERSUFIX = ipfire$(KCFG)
> +MODPATH = /lib/modules/$(KVER)-$(VERSUFIX)/extra/wlan
> +
> +VER        = 20210118-f91ddf3cc7555b9a1c27c90f23764cfc0b1b6f9c
> +
> +THISAPP    = 8821cu-$(VER)
> +DL_FILE    = $(THISAPP).tar.gz
> +DL_FROM    = $(URL_IPFIRE)
> +DIR_APP    = $(DIR_SRC)/$(THISAPP)
> +TARGET     = $(DIR_INFO)/$(THISAPP)-kmod-$(KVER)-$(VERSUFIX)
> +
> +###############################################################################
> +# Top-level Rules
> +###############################################################################
> +
> +objects = $(DL_FILE)
> +
> +$(DL_FILE) = $(DL_FROM)/$(DL_FILE)
> +
> +$(DL_FILE)_BLAKE2 = a3ea84b45258fed06baab211393725391fe26686fe85c2273605e6cb59e3e83e54d45e24bc2c3b046de9bb3af8a8cc3a584dbd80ecea3bb8416fb5e79113fb69
> +
> +install : $(TARGET)
> +
> +check : $(patsubst %,$(DIR_CHK)/%,$(objects))
> +
> +download :$(patsubst %,$(DIR_DL)/%,$(objects))
> +
> +b2 : $(subst %,%_BLAKE2,$(objects))
> +
> +dist:
> +	$(PAK)
> +
> +###############################################################################
> +# Downloading, checking, b2sum
> +###############################################################################
> +
> +$(patsubst %,$(DIR_CHK)/%,$(objects)) :
> +	@$(CHECK)
> +
> +$(patsubst %,$(DIR_DL)/%,$(objects)) :
> +	@$(LOAD)
> +
> +$(subst %,%_BLAKE2,$(objects)) :
> +	@$(B2SUM)
> +
> +###############################################################################
> +# Installation Details
> +###############################################################################
> +
> +$(TARGET) : $(patsubst %,$(DIR_DL)/%,$(objects))
> +	@$(PREBUILD)
> +	@rm -rf $(DIR_APP) && cd $(DIR_SRC) && tar axf $(DIR_DL)/$(DL_FILE)
> +	cd $(DIR_APP) && CONFIG_RTL8821CU=m make $(MAKETUNING) \
> +		-C /lib/modules/$(KVER)-$(VERSUFIX)/build/ M=$(DIR_APP)/ modules
> +
> +	# Install the built kernel modules.
> +	mkdir -p $(MODPATH)
> +	cd $(DIR_APP) && for f in $$(ls *.ko); do \
> +		/lib/modules/$$(uname -r)$(KCFG)/build/scripts/sign-file sha512 \
> +			/lib/modules/$$(uname -r)$(KCFG)/build/certs/signing_key.pem \
> +			/lib/modules/$$(uname -r)$(KCFG)/build/certs/signing_key.x509 \
> +			$$f; \
> +		xz $$f; \
> +		install -m 644 $$f.xz $(MODPATH); \
> +	done
> +
> +	@rm -rf $(DIR_APP)
> +	@$(POSTBUILD)
> +
> diff --git a/make.sh b/make.sh
> index 7fb63b913..e70dacd2a 100755
> --- a/make.sh
> +++ b/make.sh
> @@ -1172,6 +1172,7 @@ buildipfire() {
>   lfsmake2 rtl8189fs		KCFG=""
>   lfsmake2 rtl8812au		KCFG=""
>   lfsmake2 rtl8822bu		KCFG=""
> +  lfsmake2 rtl8821cu		KCFG=""
>   lfsmake2 xradio		KCFG=""
>   lfsmake2 linux-initrd		KCFG=""
> 
> -- 
> 2.36.1
>