[edn/rtl] check enable in edn main fsm
The main edn state machine does not look at the enable input
for all waiting states.
If the module is disabled by reseting the enable field, this
state main will continue to hang.
Signed-off-by: Mark Branstad <mark.branstad@wdc.com>
diff --git a/hw/ip/edn/rtl/edn_main_sm.sv b/hw/ip/edn/rtl/edn_main_sm.sv
index cebbc08..ee7ce1f 100644
--- a/hw/ip/edn/rtl/edn_main_sm.sv
+++ b/hw/ip/edn/rtl/edn_main_sm.sv
@@ -122,8 +122,12 @@
state_d = BootInsAckWait;
end
BootInsAckWait: begin
- if (csrng_cmd_ack_i) begin
- state_d = BootCaptGenCnt;
+ if (!edn_enable_i) begin
+ state_d = Idle;
+ end else begin
+ if (csrng_cmd_ack_i) begin
+ state_d = BootCaptGenCnt;
+ end
end
end
BootCaptGenCnt: begin
@@ -132,13 +136,21 @@
end
BootSendGenCmd: begin
boot_send_gencmd_o = 1'b1;
- if (cmd_sent_i) begin
- state_d = BootGenAckWait;
+ if (!edn_enable_i) begin
+ state_d = Idle;
+ end else begin
+ if (cmd_sent_i) begin
+ state_d = BootGenAckWait;
+ end
end
end
BootGenAckWait: begin
- if (csrng_cmd_ack_i) begin
- state_d = BootPulse;
+ if (!edn_enable_i) begin
+ state_d = Idle;
+ end else begin
+ if (csrng_cmd_ack_i) begin
+ state_d = BootPulse;
+ end
end
end
BootPulse: begin
@@ -154,33 +166,49 @@
AutoLoadIns: begin
auto_set_intr_gate_o = 1'b1;
auto_first_ack_wait_o = 1'b1;
- if (sw_cmd_req_load_i) begin
- state_d = AutoFirstAckWait;
+ if (!edn_enable_i) begin
+ state_d = Idle;
+ end else begin
+ if (sw_cmd_req_load_i) begin
+ state_d = AutoFirstAckWait;
+ end
end
end
AutoFirstAckWait: begin
auto_first_ack_wait_o = 1'b1;
- if (csrng_cmd_ack_i) begin
- auto_clr_intr_gate_o = 1'b1;
- state_d = AutoDispatch;
+ if (!edn_enable_i) begin
+ state_d = Idle;
+ end else begin
+ if (csrng_cmd_ack_i) begin
+ auto_clr_intr_gate_o = 1'b1;
+ state_d = AutoDispatch;
+ end
end
end
AutoAckWait: begin
auto_req_mode_busy_o = 1'b1;
- if (csrng_cmd_ack_i) begin
- state_d = AutoDispatch;
+ if (!edn_enable_i) begin
+ state_d = Idle;
+ end else begin
+ if (csrng_cmd_ack_i) begin
+ state_d = AutoDispatch;
+ end
end
end
AutoDispatch: begin
auto_req_mode_busy_o = 1'b1;
- if (!auto_req_mode_i) begin
- main_sm_done_pulse_o = 1'b1;
+ if (!edn_enable_i) begin
state_d = Idle;
end else begin
- if (max_reqs_cnt_zero_i) begin
- state_d = AutoCaptReseedCnt;
+ if (!auto_req_mode_i) begin
+ main_sm_done_pulse_o = 1'b1;
+ state_d = Idle;
end else begin
- state_d = AutoCaptGenCnt;
+ if (max_reqs_cnt_zero_i) begin
+ state_d = AutoCaptReseedCnt;
+ end else begin
+ state_d = AutoCaptGenCnt;
+ end
end
end
end
@@ -192,8 +220,12 @@
AutoSendGenCmd: begin
auto_req_mode_busy_o = 1'b1;
send_gencmd_o = 1'b1;
- if (cmd_sent_i) begin
- state_d = AutoAckWait;
+ if (!edn_enable_i) begin
+ state_d = Idle;
+ end else begin
+ if (cmd_sent_i) begin
+ state_d = AutoAckWait;
+ end
end
end
AutoCaptReseedCnt: begin
@@ -204,8 +236,12 @@
AutoSendReseedCmd: begin
auto_req_mode_busy_o = 1'b1;
send_rescmd_o = 1'b1;
- if (cmd_sent_i) begin
- state_d = AutoAckWait;
+ if (!edn_enable_i) begin
+ state_d = Idle;
+ end else begin
+ if (cmd_sent_i) begin
+ state_d = AutoAckWait;
+ end
end
end
SWPortMode: begin
