From ae903082d85338465a05be350669de8825732510 Mon Sep 17 00:00:00 2001
From: Maxim Poliakovski <maximumspatium@googlemail.com>
Date: Wed, 1 Nov 2023 16:13:12 +0100
Subject: [PATCH] amic: implement SCSI DRQ callback.

---
 devices/common/scsi/sc53c94.h | 8 ++++++++
 devices/ioctrl/amic.cpp       | 9 ++++++++-
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/devices/common/scsi/sc53c94.h b/devices/common/scsi/sc53c94.h
index 98c01ab..3f1a93c 100644
--- a/devices/common/scsi/sc53c94.h
+++ b/devices/common/scsi/sc53c94.h
@@ -32,6 +32,7 @@ along with this program.  If not, see <https://www.gnu.org/licenses/>.
 #include <devices/common/scsi/scsi.h>
 
 #include <cinttypes>
+#include <functional>
 #include <memory>
 
 class DmaBidirChannel;
@@ -145,6 +146,8 @@ typedef struct {
     int status;
 } SeqDesc;
 
+typedef std::function<void(const uint8_t drq_state)> DrqCb;
+
 class Sc53C94 : public ScsiDevice {
 public:
     Sc53C94(uint8_t chip_id=12, uint8_t my_id=7);
@@ -169,6 +172,10 @@ public:
         this->dma_ch = dma_ch;
     };
 
+    void set_drq_callback(DrqCb cb) {
+        this->drq_cb = cb;
+    }
+
     // ScsiDevice methods
     void notify(ScsiMsg msg_type, int param);
     bool prepare_data() { return false; };
@@ -233,6 +240,7 @@ private:
 
     // DMA related stuff
     DmaBidirChannel*    dma_ch;
+    DrqCb               drq_cb = nullptr;
 };
 
 #endif // SC_53C94_H
diff --git a/devices/ioctrl/amic.cpp b/devices/ioctrl/amic.cpp
index da31b8c..b66b472 100644
--- a/devices/ioctrl/amic.cpp
+++ b/devices/ioctrl/amic.cpp
@@ -47,7 +47,7 @@ along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
 AMIC::AMIC() : MMIODevice()
 {
-    this->name = "Apple Memory-mapped I/O Controller";
+    this->set_name("Apple Memory-mapped I/O Controller");
 
     supports_types(HWCompType::MMIO_DEV | HWCompType::INT_CTRL);
 
@@ -55,6 +55,13 @@ AMIC::AMIC() : MMIODevice()
     this->scsi = dynamic_cast<Sc53C94*>(gMachineObj->get_comp_by_name("Sc53C94"));
     this->scsi_dma = std::unique_ptr<AmicScsiDma> (new AmicScsiDma());
     this->scsi->set_dma_channel(this->scsi_dma.get());
+    this->scsi->set_drq_callback([this](const uint8_t drq_state) {
+        if (drq_state & 1)
+            via2_ifr |= VIA2_INT_SCSI_DRQ;
+        else
+            via2_ifr &= ~VIA2_INT_SCSI_DRQ;
+        this->update_via2_irq();
+    });
 
     // connect serial HW
     this->escc = dynamic_cast<EsccController*>(gMachineObj->get_comp_by_name("Escc"));