From ee9c6921159b37b54ebc96e1a3473b5a28cf137c Mon Sep 17 00:00:00 2001
From: Maxim Poliakovski <maximumspatium@googlemail.com>
Date: Wed, 9 Aug 2023 01:39:53 +0200
Subject: [PATCH] mesh: implement more register reads.

---
 devices/common/scsi/mesh.cpp | 14 +++++++++++++-
 devices/common/scsi/mesh.h   |  2 ++
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/devices/common/scsi/mesh.cpp b/devices/common/scsi/mesh.cpp
index 7f22ad8..6ca3d91 100644
--- a/devices/common/scsi/mesh.cpp
+++ b/devices/common/scsi/mesh.cpp
@@ -46,23 +46,31 @@ int MeshController::device_postinit()
 void MeshController::reset(bool is_hard_reset)
 {
     this->cur_cmd       = SeqCmd::NoOperation;
+    this->fifo_cnt      = 0;
     this->int_mask      = 0;
+    this->xfer_count    = 0;
 
     if (is_hard_reset) {
         this->bus_stat      = 0;
-        this->sync_params   = 2; // guessed
+        this->sync_params   = (0 << 16) | 2; // fast async operation (guessed)
     }
 }
 
 uint8_t MeshController::read(uint8_t reg_offset)
 {
     switch(reg_offset) {
+    case MeshReg::XferCount0:
+        return this->xfer_count & 0xFFU;
+    case MeshReg::XferCount1:
+        return (this->xfer_count >> 8) & 0xFFU;
     case MeshReg::Sequence:
         return this->cur_cmd;
     case MeshReg::BusStatus0:
         return this->bus_obj->test_ctrl_lines(0xFFU);
     case MeshReg::BusStatus1:
         return this->bus_obj->test_ctrl_lines(0xE000U) >> 8;
+    case MeshReg::FIFOCount:
+        return this->fifo_cnt;
     case MeshReg::Exception:
         return 0;
     case MeshReg::Error:
@@ -71,6 +79,10 @@ uint8_t MeshController::read(uint8_t reg_offset)
         return this->int_mask;
     case MeshReg::Interrupt:
         return this->int_stat;
+    case MeshReg::DestID:
+        return this->dst_id;
+    case MeshReg::SyncParms:
+        return this->sync_params;
     case MeshReg::MeshID:
         return this->chip_id; // tell them who we are
     default:
diff --git a/devices/common/scsi/mesh.h b/devices/common/scsi/mesh.h
index 8384eb7..d77dc0c 100644
--- a/devices/common/scsi/mesh.h
+++ b/devices/common/scsi/mesh.h
@@ -138,7 +138,9 @@ private:
     uint8_t     dst_id;
     uint8_t     cur_cmd;
     uint8_t     error;
+    uint8_t     fifo_cnt;
     uint8_t     exception;
+    uint32_t    xfer_count;
 
     ScsiBus*    bus_obj;
     uint16_t    bus_stat;