Rename to DuckStation

2025-06-18 12:55:47 -04:00 · 2019-10-04 13:54:09 +10:00
parent 92ec5a0a14
commit bddbab9d60
61 changed files with 43 additions and 54 deletions
--- a/src/core/pad.h
+++ b/src/core/pad.h
@ -0,0 +1,120 @@
+#pragma once
+#include "common/bitfield.h"
+#include "common/fifo_queue.h"
+#include "types.h"
+#include <array>
+#include <memory>
+
+class StateWrapper;
+
+class System;
+class InterruptController;
+class PadDevice;
+
+class Pad
+{
+public:
+  Pad();
+  ~Pad();
+
+  bool Initialize(System* system, InterruptController* interrupt_controller);
+  void Reset();
+  bool DoState(StateWrapper& sw);
+
+  PadDevice* GetController(u32 slot) { return m_controllers[slot].get(); }
+  void SetController(u32 slot, std::shared_ptr<PadDevice> dev) { m_controllers[slot] = dev; }
+
+  PadDevice* GetMemoryCard(u32 slot) { return m_memory_cards[slot].get(); }
+  void SetMemoryCard(u32 slot, std::shared_ptr<PadDevice> dev) { m_memory_cards[slot] = dev; }
+
+  u32 ReadRegister(u32 offset);
+  void WriteRegister(u32 offset, u32 value);
+
+  void Execute(TickCount ticks);
+
+private:
+  static constexpr u32 NUM_SLOTS = 2;
+  static constexpr u32 TRANSFER_TICKS = 750;
+
+  enum class State : u32
+  {
+    Idle,
+    Transmitting
+  };
+
+  enum class ActiveDevice : u8
+  {
+    None,
+    Controller,
+    MemoryCard
+  };
+
+  union JOY_CTRL
+  {
+    u16 bits;
+
+    BitField<u16, bool, 0, 1> TXEN;
+    BitField<u16, bool, 1, 1> SELECT;
+    BitField<u16, bool, 2, 1> RXEN;
+    BitField<u16, bool, 4, 1> ACK;
+    BitField<u16, bool, 6, 1> RESET;
+    BitField<u16, u8, 8, 2> RXIMODE;
+    BitField<u16, bool, 10, 1> TXINTEN;
+    BitField<u16, bool, 11, 1> RXINTEN;
+    BitField<u16, bool, 12, 1> ACKINTEN;
+    BitField<u16, u8, 13, 1> SLOT;
+  };
+
+  union JOY_STAT
+  {
+    u32 bits;
+
+    BitField<u32, bool, 0, 1> TXRDY;
+    BitField<u32, bool, 1, 1> RXFIFONEMPTY;
+    BitField<u32, bool, 2, 1> TXDONE;
+    BitField<u32, bool, 7, 1> ACKINPUT;
+    BitField<u32, bool, 9, 1> INTR;
+    BitField<u32, u32, 11, 21> TMR;
+  };
+
+  union JOY_MODE
+  {
+    u16 bits;
+
+    BitField<u16, u8, 0, 2> reload_factor;
+    BitField<u16, u8, 2, 2> character_length;
+    BitField<u16, bool, 4, 1> parity_enable;
+    BitField<u16, u8, 5, 1> parity_type;
+    BitField<u16, u8, 8, 1> clk_polarity;
+  };
+
+  bool IsTransmitting() const { return m_state == State::Transmitting; }
+  bool CanTransfer() const
+  {
+    return !m_TX_FIFO.IsEmpty() && !m_RX_FIFO.IsFull() && m_JOY_CTRL.SELECT && m_JOY_CTRL.TXEN;
+  }
+
+  void SoftReset();
+  void UpdateJoyStat();
+  void BeginTransfer();
+  void DoTransfer();
+  void EndTransfer();
+  void ResetDeviceTransferState();
+
+  System* m_system = nullptr;
+  InterruptController* m_interrupt_controller = nullptr;
+
+  State m_state = State::Idle;
+  TickCount m_ticks_remaining = 0;
+
+  JOY_CTRL m_JOY_CTRL = {};
+  JOY_STAT m_JOY_STAT = {};
+  JOY_MODE m_JOY_MODE = {};
+
+  ActiveDevice m_active_device = ActiveDevice::None;
+  InlineFIFOQueue<u8, 8> m_RX_FIFO;
+  InlineFIFOQueue<u8, 2> m_TX_FIFO;
+
+  std::array<std::shared_ptr<PadDevice>, NUM_SLOTS> m_controllers;
+  std::array<std::shared_ptr<PadDevice>, NUM_SLOTS> m_memory_cards;
+};