kein WLAN broadcom 4312

hi Freunde,
kein wlan broadcom 4312, bin linux anfänger

ich bedanke mich im voraus

root@xz:~# ifconfig
enp9s0: flags=4099 mtu 1500
ether 00:21:70:b0:67:6d txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
device interrupt 18
lo: flags=73 mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10
loop txqueuelen 1000 (Lokale Schleife)
RX packets 102 bytes 8114 (8.1 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 102 bytes 8114 (8.1 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

root@xz:~# iwconfig
wwp0s29f7u2u2i6 no wireless extensions.
lo no wireless extensions.
enp9s0 no wireless extensions.

root@xz:~# lspci -nnk | grep -i net -A2
09:00.0 Ethernet controller [0200]: Broadcom Inc. and subsidiaries NetXtreme BCM5752 Gigabit Ethernet PCI Express [14e4:1600] (rev 02)
Subsystem: Dell NetXtreme BCM5752 Gigabit Ethernet PCI Express [1028:0201]
Kernel driver in use: tg3
Kernel modules: tg3
0c:00.0 Network controller [0280]: Broadcom Inc. and subsidiaries BCM4312 802.11b/g LP-PHY [14e4:4315] (rev 01)
Subsystem: Dell Wireless 1395 WLAN Mini-Card [1028:000b]
Kernel driver in use: b43-pci-bridge