REG_RX_FILTER
(void) t1_tpi_read(adapter, MACREG(mac, REG_RX_FILTER), &val);
(void) t1_tpi_write(adapter, MACREG(mac, REG_RX_FILTER), new_mode);
(void) t1_tpi_write(adapter, MACREG(mac, REG_RX_FILTER), 3);
(void) t1_tpi_write(adapter, MACREG(mac, REG_RX_FILTER), 2);