196     uint32_t tx, rx, payload_len;  in transfer()  local
201         tx = 0;  in transfer()
204                 tx <<= 8;  in transfer()
206                 tx = (tx << 8) | fifo8_pop(&s->tx_fifo);  in transfer()
211         rx = ssi_transfer(s->ssi_bus, tx);  in transfer()
248      * If M != 0 the shift count is M bytes and M is the number of tx bytes.  in calculate_N1()
250      * M is the shift count but tx and rx is determined by the count control  in calculate_N1()
263         /* If tx count control for N1 is set, load the tx value */  in calculate_N1()
285              * indicate transmit then reset the tx count to 0  in calculate_N1()
351      * whether N1 is used for tx, rx or both.  Loop over the size to build a  in operation_shiftn1()
386                  * We hit a shift_n1 opcode TX but the TDR is empty, tell the  in operation_shiftn1()
420      * If we are not stopping due to an empty TDR and we are doing an N1 TX  in operation_shiftn1()
424      * Ignore the send_n1_alone flag, all that does is defer the TX until the N2  in operation_shiftn1()
454         /* We have a TX and a full TDR or an RX and an empty RDR */  in operation_shiftn1()
485      * M is the shift count but tx and rx is determined by the count control  in calculate_N2()
498         /* If tx count control for N2 is set, load the tx value */  in calculate_N2()
522             /* If tx count control for N2 is set, load the tx value */  in calculate_N2()
571      * TX data of the payload, this code will handle transmitting those  in operation_shiftn2()
591             /* Always append data for the N2 segment if it is set for TX */  in operation_shiftn2()
603              * Regardless of whether or not N2 is set for TX or RX, we need  in operation_shiftn2()
616         /* We have a TX and a full TDR or an RX and an empty RDR */  in operation_shiftn2()
620          * If we are doing an N2 TX and the TDR is full we need to clear the  in operation_shiftn2()