TXRX_CSR0_ALGORITHM
curr_cipher = rt2x00_get_field16(reg, TXRX_CSR0_ALGORITHM);
rt2x00_set_field16(®, TXRX_CSR0_ALGORITHM, crypto->cipher);
rt2x00_set_field16(®, TXRX_CSR0_ALGORITHM, CIPHER_NONE);