From a849e79a697fe8ec832f88caed9ed513d4465cdc Mon Sep 17 00:00:00 2001
From: arbee <rb6502@users.noreply.github.com>
Date: Sat, 13 May 2023 19:34:02 -0400
Subject: [PATCH] machine/opti82c861.cpp: Skeleton for OPTi 82C861 PCI USB OHCI
 controller. [R. Belmont]

---
 scripts/src/machine.lua            | 12 +++++++
 src/devices/machine/opti82c861.cpp | 53 ++++++++++++++++++++++++++++++
 src/devices/machine/opti82c861.h   | 31 +++++++++++++++++
 3 files changed, 96 insertions(+)
 create mode 100644 src/devices/machine/opti82c861.cpp
 create mode 100644 src/devices/machine/opti82c861.h

diff --git a/scripts/src/machine.lua b/scripts/src/machine.lua
index b8b6f009097..1b373a32cc2 100644
--- a/scripts/src/machine.lua
+++ b/scripts/src/machine.lua
@@ -4503,6 +4503,18 @@ if (MACHINES["GEN_FIFO"]~=null) then
 	}
 end
 
+---------------------------------------------------
+--
+--@src/devices/machine/opti82c861.h,MACHINES["OPTI82C861"] = true
+---------------------------------------------------
+
+if (MACHINES["OPTI82C861"]~=null) then
+	files {
+		MAME_DIR .. "src/devices/machine/opti82c861.cpp",
+		MAME_DIR .. "src/devices/machine/opti82c861.h",
+	}
+end
+
 ---------------------------------------------------
 --
 --@src/devices/machine/output_latch.h,MACHINES["OUTPUT_LATCH"] = true
diff --git a/src/devices/machine/opti82c861.cpp b/src/devices/machine/opti82c861.cpp
new file mode 100644
index 00000000000..53d955e41e0
--- /dev/null
+++ b/src/devices/machine/opti82c861.cpp
@@ -0,0 +1,53 @@
+// license:BSD-3-Clause
+// copyright-holders: R. Belmont
+/*
+    OPTi 82C861 "FireLink" USB 1.1 OHCI controller
+    Skeleton by R. Belmont
+*/
+
+#include "emu.h"
+#include "opti82c861.h"
+
+#define LOG_GENERAL     (1U << 0)
+#define LOG_REGISTERS   (1U << 0)
+
+#define VERBOSE (0)
+#include "logmacro.h"
+
+DEFINE_DEVICE_TYPE(OPTI_82C861, opti_82c861_device, "opti82c861", "OPTi 82C861 USB OHCI controller")
+
+opti_82c861_device::opti_82c861_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock)
+	: pci_device(mconfig, type, tag, owner, clock)
+{
+}
+
+opti_82c861_device::opti_82c861_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
+	: opti_82c861_device(mconfig, OPTI_82C861, tag, owner, clock)
+{
+}
+
+void opti_82c861_device::mem_map(address_map& map)
+{
+}
+
+void opti_82c861_device::config_map(address_map &map)
+{
+	pci_device::config_map(map);
+}
+
+void opti_82c861_device::device_start()
+{
+	pci_device::device_start();
+	set_ids(0x1045c861, 0x10, 0x0c0310, 0);
+	revision = 0x10;
+	add_map(0x1000, M_MEM, FUNC(opti_82c861_device::mem_map));  // 4KiB memory map
+
+	command = 0;
+	intr_pin = 1;
+	intr_line = 0;
+}
+
+void opti_82c861_device::map_extra(uint64_t memory_window_start, uint64_t memory_window_end, uint64_t memory_offset, address_space *memory_space,
+							uint64_t io_window_start, uint64_t io_window_end, uint64_t io_offset, address_space *io_space)
+{
+}
diff --git a/src/devices/machine/opti82c861.h b/src/devices/machine/opti82c861.h
new file mode 100644
index 00000000000..41ee4c480e9
--- /dev/null
+++ b/src/devices/machine/opti82c861.h
@@ -0,0 +1,31 @@
+// license:BSD-3-Clause
+// copyright-holders: R. Belmont
+
+#ifndef MAME_MACHINE_OPTI82C861_H
+#define MAME_MACHINE_OPTI82C861_H
+
+#pragma once
+
+#include "machine/pci.h"
+
+class opti_82c861_device : public pci_device
+{
+public:
+	opti_82c861_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock);
+	opti_82c861_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
+
+	void mem_map(address_map &map);
+
+protected:
+	virtual void device_start() override;
+
+	void map_extra(u64 memory_window_start, u64 memory_window_end, u64 memory_offset, address_space *memory_space,
+				   u64 io_window_start, u64 io_window_end, u64 io_offset, address_space *io_space) override;
+	void config_map(address_map &map) override;
+
+private:
+};
+
+DECLARE_DEVICE_TYPE(OPTI_82C861, opti_82c861_device)
+
+#endif