I have the BCM4311(r1) and it works fine with the b43 drivers that are included with bt4r2, however, I have not been able to get packet injection to work. I tried disabling the wl driver that is also enabled and blacklisted it, but injection still would not work. I did this because I thought that there was a conflict between the two drivers. If anyone has gotten this chipset to work with injection please let me know.