Added dummy conexant video encoder device

CMakeLists.txt

@@ -69,6 +69,7 @@ set(HEADERS
  "${NXBX_ROOT_DIR}/src/hw/pit.hpp"
  "${NXBX_ROOT_DIR}/src/hw/smbus.hpp"
  "${NXBX_ROOT_DIR}/src/hw/smc.hpp"
+ "${NXBX_ROOT_DIR}/src/hw/video/conexant.hpp"
  "${NXBX_ROOT_DIR}/src/hw/video/vga.hpp"
  "${NXBX_ROOT_DIR}/src/hw/video/gpu/nv2a.hpp"
  "${NXBX_ROOT_DIR}/src/hw/video/gpu/nv2a_defs.hpp"
@@ -106,6 +107,7 @@ set(SOURCES
  "${NXBX_ROOT_DIR}/src/hw/pit.cpp"
  "${NXBX_ROOT_DIR}/src/hw/smbus.cpp"
  "${NXBX_ROOT_DIR}/src/hw/smc.cpp"
+ "${NXBX_ROOT_DIR}/src/hw/video/conexant.cpp"
  "${NXBX_ROOT_DIR}/src/hw/video/vga.cpp"
  "${NXBX_ROOT_DIR}/src/hw/video/gpu/nv2a.cpp"
  "${NXBX_ROOT_DIR}/src/hw/video/gpu/pbus.cpp"

src/hw/machine.hpp

@@ -14,6 +14,7 @@
 #include "eeprom.hpp"
 #include "smc.hpp"
 #include "adm.hpp"
+#include "video/conexant.hpp"
 #include "video/vga.hpp"
 #include "video/gpu/nv2a.hpp"
 
@@ -24,7 +25,7 @@ concept is_cpu_t = std::is_same_v<T, cpu_t *>;
 class machine {
 public:
 	machine() : m_cpu(this), m_pit(this), m_pic{ {this, 0, "MASTER PIC"}, {this, 1, "SLAVE PIC"} }, m_pci(this), m_cmos(this), m_nv2a(this),
-	m_vga(this), m_smbus(this), m_eeprom(log_module::eeprom), m_smc(this, log_module::smc), m_adm(log_module::adm) {}
+	m_vga(this), m_smbus(this), m_eeprom(log_module::eeprom), m_smc(this, log_module::smc), m_adm(log_module::adm), m_conexant(log_module::conexant) {}
 	bool init(const init_info_t &init_info)
 	{
 		if (!m_cpu.init(init_info)) {
@@ -60,6 +61,9 @@ class machine {
 		if (!m_smc.init()) {
 			return false;
 		}
+		if (!m_conexant.init()) {
+			return false;
+		}
 		return true;
 	}
 	void deinit()
@@ -110,6 +114,9 @@ class machine {
 		else if constexpr (std::is_same_v<T, adm>) {
 			return m_adm;
 		}
+		else if constexpr (std::is_same_v<T, conexant>) {
+			return m_conexant;
+		}
 		else if constexpr (std::is_same_v<T, nv2a>) {
 			return m_nv2a;
 		}
@@ -193,4 +200,5 @@ class machine {
 	eeprom m_eeprom;
 	smc m_smc;
 	adm m_adm;
+	conexant m_conexant;
 };

src/hw/smbus.cpp

@@ -299,6 +299,7 @@ smbus::init()
 	m_devs[0x54] = &m_machine->get<eeprom>(); // eeprom
 	m_devs[0x10] = &m_machine->get<smc>(); // smc
 	m_devs[0x4C] = &m_machine->get<adm>(); // adm
+	m_devs[0x45] = &m_machine->get<conexant>(); // conexant video encoder
 	reset();
 	return true;
 }

src/hw/video/conexant.cpp

@@ -0,0 +1,66 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+// SPDX-FileCopyrightText: 2024 ergo720
+
+#include "machine.hpp"
+
+#define MODULE_NAME conexant
+
+
+std::optional<uint16_t>
+conexant::quick_command(bool command)
+{
+	return 0;
+}
+
+std::optional<uint16_t>
+conexant::receive_byte()
+{
+	return 0;
+}
+
+std::optional<uint16_t>
+conexant::send_byte(uint8_t data)
+{
+	return 0;
+}
+
+std::optional<uint16_t>
+conexant::read_byte(uint8_t command)
+{
+	return m_regs[command];
+}
+
+std::optional<uint16_t>
+conexant::write_byte(uint8_t command, uint8_t data)
+{
+	m_regs[command] = data;
+	return 0;
+}
+
+std::optional<uint16_t>
+conexant::read_word(uint8_t command)
+{
+	return m_regs[command] | ((uint16_t)m_regs[command + 1] << 8);
+}
+
+std::optional<uint16_t>
+conexant::write_word(uint8_t command, uint16_t data)
+{
+	m_regs[command] = data & 0xFF;
+	m_regs[command + 1] = data >> 8;
+	return 0;
+}
+
+void
+conexant::reset()
+{
+	std::fill(std::begin(m_regs), std::end(m_regs), 0);
+}
+
+bool
+conexant::init()
+{
+	reset();
+	return true;
+}

src/hw/video/conexant.hpp

@@ -0,0 +1,26 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+// SPDX-FileCopyrightText: 2024 ergo720
+
+#pragma once
+
+#include "smbus.hpp"
+
+
+class conexant : public smbus_device {
+public:
+	conexant(log_module module_name) : smbus_device(module_name) {}
+	bool init();
+	void deinit() override {}
+	void reset();
+	std::optional<uint16_t> quick_command(bool command) override;
+	std::optional<uint16_t> receive_byte() override;
+	std::optional<uint16_t> send_byte(uint8_t data) override;
+	std::optional<uint16_t> read_byte(uint8_t command) override;
+	std::optional<uint16_t> write_byte(uint8_t command, uint8_t data) override;
+	std::optional<uint16_t> read_word(uint8_t command) override;
+	std::optional<uint16_t> write_word(uint8_t command, uint16_t data) override;
+
+private:
+	uint8_t m_regs[256];
+};

src/logger.hpp

@@ -57,6 +57,7 @@ enum class log_module : int32_t {
 	eeprom,
 	smc,
 	adm,
+	conexant,
 	max,
 };
 
@@ -86,6 +87,7 @@ inline constexpr std::array module_to_str = {
 	"EEPROM -> ",
 	"SMC -> ",
 	"ADM -> ",
+	"CONEXANT -> "
 };
 static_assert(module_to_str.size() == (uint32_t)(log_module::max));