IBI: Handle lost arbitration

Signed-off-by: Wiktoria Kuna <[email protected]>

Author: wkkuna

doc/cts-list.md

@@ -20,5 +20,6 @@
 | pvt_read       | 5.1.2.3.3 Ninth Bit of SDR Slave Returned (Read) Data as End-of-Data              |
 | pvt_write      | 5.1.2.3.1 Transition from Address ACK to SDR Master Write Data                    |
 | slv_intr_req   | 5.1.6 In-Band Interrupt <br /> 5.1.6.2 I3C Slave Interrupt Request                |
+| slv_addr_arb   | 5.1.2.2.1 I3C Address Arbitration <br /> 5.1.6 In-Band Interrupt                  |
 
 

src/ctrl/controller_standby_i3c.sv

@@ -591,6 +591,7 @@ module controller_standby_i3c
       .bus_rx_req_value_i(ibi_bus_rx_data),
 
       .t_hd_dat_i(t_hd_dat_i),
+      .arbitration_lost_i,
       .sda_o(ibi_sda)
   );
 

src/ctrl/ibi.sv

@@ -61,6 +61,7 @@ module ibi (
 
     // Bus drive interface
     input  logic [19:0] t_hd_dat_i,
+    input logic arbitration_lost_i,
     output logic sda_o
 );
 
@@ -139,6 +140,7 @@ module ibi (
 
         DriveAddr:
         if (bus_stop_i) state_q <= Done;
+        else if (arbitration_lost_i) state_q <= WaitStopOrRstart;
         else if (bus_tx_done_i) state_q <= ReadAck;
 
         ReadAck: