b43_phy_shm_tssi_read
int b43_phy_shm_tssi_read(struct b43_wldev *dev, u16 shm_offset);
cck_result = b43_phy_shm_tssi_read(dev, B43_SHM_SH_TSSI_CCK);
ofdm_result = b43_phy_shm_tssi_read(dev, B43_SHM_SH_TSSI_OFDM_G);