cndm_proto: Use SV enums for state machines

Signed-off-by: Alex Forencich <alex@alexforencich.com>

src/cndm_proto/rtl/cndm_proto_cpl_wr.sv

@@ -66,12 +66,13 @@ taxi_axis_if #(
 ) cpl_comb();
 
 // Completion write control state machine
-localparam [2:0]
-    STATE_IDLE = 0,
-    STATE_RX_CPL = 1,
-    STATE_WRITE_DATA = 2;
+typedef enum logic [1:0] {
+    STATE_IDLE,
+    STATE_RX_CPL,
+    STATE_WRITE_DATA
+} state_t;
 
-logic [2:0] state_reg = STATE_IDLE;
+state_t state_reg = STATE_IDLE;
 
 logic [15:0] txcq_prod_ptr_reg = '0;
 logic [15:0] rxcq_prod_ptr_reg = '0;

src/cndm_proto/rtl/cndm_proto_desc_rd.sv

@@ -69,13 +69,14 @@ taxi_dma_desc_if #(
 ) dma_desc();
 
 // Descriptor read control state machine
-localparam [2:0]
-    STATE_IDLE = 0,
-    STATE_READ_DESC = 1,
-    STATE_READ_DATA = 2,
-    STATE_TX_DESC = 3;
+typedef enum logic [1:0] {
+    STATE_IDLE,
+    STATE_READ_DESC,
+    STATE_READ_DATA,
+    STATE_TX_DESC
+} state_t;
 
-logic [2:0] state_reg = STATE_IDLE;
+state_t state_reg = STATE_IDLE;
 
 logic [1:0] desc_req_reg = '0;
 

src/cndm_proto/rtl/cndm_proto_rx.sv

@@ -64,13 +64,14 @@ taxi_dma_desc_if #(
 ) dma_desc();
 
 // Receive datapath control state machine
-localparam [2:0]
-    STATE_IDLE = 0,
-    STATE_RX_DATA = 1,
-    STATE_READ_DESC = 2,
-    STATE_WRITE_DATA = 3;
+typedef enum logic [1:0] {
+    STATE_IDLE,
+    STATE_RX_DATA,
+    STATE_READ_DESC,
+    STATE_WRITE_DATA
+} state_t;
 
-logic [2:0] state_reg = STATE_IDLE;
+state_t state_reg = STATE_IDLE;
 
 logic desc_req_reg = 1'b0;
 

src/cndm_proto/rtl/cndm_proto_tx.sv

@@ -64,13 +64,14 @@ taxi_dma_desc_if #(
 ) dma_desc();
 
 // Transmit datapath control state machine
-localparam [2:0]
-    STATE_IDLE = 0,
-    STATE_READ_DESC = 1,
-    STATE_READ_DATA = 2,
-    STATE_TX_DATA = 3;
+typedef enum logic [1:0] {
+    STATE_IDLE,
+    STATE_READ_DESC,
+    STATE_READ_DATA,
+    STATE_TX_DATA
+} state_t;
 
-logic [2:0] state_reg = STATE_IDLE;
+state_t state_reg = STATE_IDLE;
 
 logic desc_req_reg = 1'b0;