broadcom

lsusb | grep -i bluetooth
dmesg | grep -i bluetooth
dmidecode -t0

descarregar este driver: https://download.lenovo.com/ibmdl/pub/pc/pccbbs/mobiles/g4wh01ww.exe

innoextract g4wh01ww.exe
cd app
find . -name '*.inf' -type f -exec grep -A5 -i 21e6 -- {} + | grep .hex

e o resultado: