SPI_CS_TA
cs = BCM_SPI_READ(sc, SPI_CS) & (SPI_CS_TA | SPI_CS_TXD);
cs == (SPI_CS_TA | SPI_CS_TXD)) {
cs = BCM_SPI_READ(sc, SPI_CS) & (SPI_CS_TA | SPI_CS_TXD);
SPI_CS_TA | SPI_CS_INTR | SPI_CS_INTD, 0);
SPI_CS_MASK | SPI_CS_TA | SPI_CS_INTR | SPI_CS_INTD,
SPI_CS_TA | SPI_CS_INTR | SPI_CS_INTD);
SPI_CS, SPI_CS_TA | SPI_CS_INTR | SPI_CS_INTD, 0);