From be4b34d95b99d229988971256d8e78f8f9390bf9 Mon Sep 17 00:00:00 2001
From: Maciej Kurc <mkurc@antmicro.com>
Date: Tue, 29 Oct 2024 15:51:38 +0100
Subject: [PATCH] Add logic servicing payload_available and image_activated
 signals.

Internal-tag: [#68034]
Signed-off-by: Maciej Kurc <mkurc@antmicro.com>
---
 src/recovery/recovery_executor.sv | 16 ++++++++++++++++
 src/recovery/recovery_handler.sv  |  5 +++++
 2 files changed, 21 insertions(+)

diff --git a/src/recovery/recovery_executor.sv b/src/recovery/recovery_executor.sv
index 5361fd8..a9ec417 100644
--- a/src/recovery/recovery_executor.sv
+++ b/src/recovery/recovery_executor.sv
@@ -43,6 +43,9 @@ module recovery_executor
 
     input logic host_abort_i,
 
+    // Recovery image activation signal
+    output logic image_activated_o,
+
     // Recovery CSR interface
     input  I3CCSR_pkg::I3CCSR__I3C_EC__SecFwRecoveryIf__out_t hwif_rec_i,
     output I3CCSR_pkg::I3CCSR__I3C_EC__SecFwRecoveryIf__in_t  hwif_rec_o
@@ -382,4 +385,17 @@ module recovery_executor
       default:     res_dlast_o <= '0;
     endcase
 
+  // ....................................................
+
+  // Image activation logic.
+  // When 0xF is written to byte 2 of RECOVERY_CTRL CSR latch the signal that
+  // triggers recovery image activation. To clear the latch the device must
+  // exit the recovery mode (this module will be reset then).
+  always_ff @(posedge clk_i or negedge rst_ni)
+    if (!rst_ni)
+      image_activated_o <= '0;
+    else if (hwif_rec_o.RECOVERY_CTRL.PLACEHOLDER.we &&
+             hwif_rec_o.RECOVERY_CTRL.PLACEHOLDER.next[27:24] == 4'hF)
+      image_activated_o <= 1'b1;
+
 endmodule
diff --git a/src/recovery/recovery_handler.sv b/src/recovery/recovery_handler.sv
index 810a714..6211253 100644
--- a/src/recovery/recovery_handler.sv
+++ b/src/recovery/recovery_handler.sv
@@ -401,6 +401,9 @@ module recovery_handler
       .tx_reg_rst_data_o(tti_tx_data_queue_reg_rst_next)
   );
 
+  // Recovery data available signal.
+  assign payload_available_o = recovery_enable & !tti_rx_data_queue_empty;
+
   // IBI
   write_queue #(
 
@@ -863,6 +866,8 @@ module recovery_handler
 
       .host_abort_i(ctl_tti_tx_host_nack_i | ctl_bus_stop_i),
 
+      .image_activated_o (image_activated_o),
+
       .hwif_rec_i(hwif_rec_i),
       .hwif_rec_o(hwif_rec_o)
   );