Implement Broadway GPIOs

SLOT_LED and the AVE ones are not implemented yet, but the other Broadway ones are.

Source/Core/Common/BitUtils.h

@@ -8,6 +8,7 @@
 #include <climits>
 #include <cstddef>
 #include <cstring>
+#include <initializer_list>
 #include <type_traits>
 
 namespace Common
@@ -299,4 +300,44 @@ void SetBit(T& value, size_t bit_number, bool bit_value)
     value &= ~(T{1} << bit_number);
 }
 
+template <typename T>
+class FlagBit
+{
+public:
+  FlagBit(std::underlying_type_t<T>& bits, T bit) : m_bits(bits), m_bit(bit) {}
+  explicit operator bool() const
+  {
+    return (m_bits & static_cast<std::underlying_type_t<T>>(m_bit)) != 0;
+  }
+  FlagBit& operator=(const bool rhs)
+  {
+    if (rhs)
+      m_bits |= static_cast<std::underlying_type_t<T>>(m_bit);
+    else
+      m_bits &= ~static_cast<std::underlying_type_t<T>>(m_bit);
+    return *this;
+  }
+
+private:
+  std::underlying_type_t<T>& m_bits;
+  T m_bit;
+};
+
+template <typename T>
+class Flags
+{
+public:
+  constexpr Flags() = default;
+  constexpr Flags(std::initializer_list<T> bits)
+  {
+    for (auto bit : bits)
+    {
+      m_hex |= static_cast<std::underlying_type_t<T>>(bit);
+    }
+  }
+  FlagBit<T> operator[](T bit) { return FlagBit(m_hex, bit); }
+
+  std::underlying_type_t<T> m_hex = 0;
+};
+
 }  // namespace Common

Source/Core/Core/HW/WII_IPC.cpp

@@ -8,6 +8,7 @@
 #include "Common/CommonTypes.h"
 #include "Common/Logging/Log.h"
 #include "Core/CoreTiming.h"
+#include "Core/HW/DVD/DVDInterface.h"
 #include "Core/HW/MMIO.h"
 #include "Core/HW/ProcessorInterface.h"
 #include "Core/IOS/IOS.h"
@@ -97,7 +98,11 @@ static u32 ppc_irq_masks;
 static u32 arm_irq_flags;
 static u32 arm_irq_masks;
 
-static u32 sensorbar_power;  // do we need to care about this?
+// Indicates which pins are accessible by broadway.  Writable by starlet only.
+static constexpr Common::Flags<GPIO> gpio_owner = {GPIO::SLOT_LED, GPIO::SLOT_IN, GPIO::SENSOR_BAR,
+                                                   GPIO::DO_EJECT, GPIO::AVE_SCL, GPIO::AVE_SDA};
+static Common::Flags<GPIO> gpio_dir;
+Common::Flags<GPIO> g_gpio_out;
 
 static CoreTiming::EventType* updateInterrupts;
 static void UpdateInterrupts(u64 = 0, s64 cyclesLate = 0);
@@ -111,7 +116,7 @@ void DoState(PointerWrap& p)
   p.Do(ppc_irq_masks);
   p.Do(arm_irq_flags);
   p.Do(arm_irq_masks);
-  p.Do(sensorbar_power);
+  p.Do(g_gpio_out);
 }
 
 static void InitState()
@@ -125,7 +130,9 @@ static void InitState()
   arm_irq_flags = 0;
   arm_irq_masks = 0;
 
-  sensorbar_power = 0;
+  // The only input broadway has is SLOT_IN; all the others it has access to are outputs
+  gpio_dir = {GPIO::SLOT_LED, GPIO::SENSOR_BAR, GPIO::DO_EJECT, GPIO::AVE_SCL, GPIO::AVE_SDA};
+  g_gpio_out = {};
 
   ppc_irq_masks |= INT_CAUSE_IPC_BROADWAY;
 }
@@ -181,14 +188,29 @@ void RegisterMMIO(MMIO::Mapping* mmio, u32 base)
                    CoreTiming::ScheduleEvent(0, updateInterrupts, 0);
                  }));
 
-  mmio->Register(base | GPIOB_OUT, MMIO::Constant<u32>(0),
-                 MMIO::DirectWrite<u32>(&sensorbar_power));
+  mmio->Register(base | GPIOB_OUT, MMIO::DirectRead<u32>(&g_gpio_out.m_hex),
+                 MMIO::ComplexWrite<u32>([](u32, u32 val) {
+                   g_gpio_out.m_hex = val & gpio_owner.m_hex;
+                   if (g_gpio_out[GPIO::DO_EJECT])
+                   {
+                     INFO_LOG(WII_IPC, "Ejecting disc due to GPIO write");
+                     DVDInterface::EjectDisc();
+                   }
+                   // SENSOR_BAR is checked by WiimoteEmu::CameraLogic
+                   // TODO: AVE, SLOT_LED
+                 }));
+  mmio->Register(base | GPIOB_DIR, MMIO::DirectRead<u32>(&gpio_dir.m_hex),
+                 MMIO::DirectWrite<u32>(&gpio_dir.m_hex));
+  mmio->Register(base | GPIOB_IN, MMIO::ComplexRead<u32>([](u32) {
+                   Common::Flags<GPIO> gpio_in;
+                   gpio_in[GPIO::SLOT_IN] = DVDInterface::IsDiscInside();
+                   return gpio_in.m_hex;
+                 }),
+                 MMIO::Nop<u32>());
 
   // Register some stubbed/unknown MMIOs required to make Wii games work.
   mmio->Register(base | PPCSPEED, MMIO::InvalidRead<u32>(), MMIO::Nop<u32>());
   mmio->Register(base | VISOLID, MMIO::InvalidRead<u32>(), MMIO::Nop<u32>());
-  mmio->Register(base | GPIOB_DIR, MMIO::Constant<u32>(0), MMIO::Nop<u32>());
-  mmio->Register(base | GPIOB_IN, MMIO::Constant<u32>(0), MMIO::Nop<u32>());
   mmio->Register(base | UNK_180, MMIO::Constant<u32>(0), MMIO::Nop<u32>());
   mmio->Register(base | UNK_1CC, MMIO::Constant<u32>(0), MMIO::Nop<u32>());
   mmio->Register(base | UNK_1D0, MMIO::Constant<u32>(0), MMIO::Nop<u32>());

Source/Core/Core/HW/WII_IPC.h

@@ -4,6 +4,7 @@
 
 #pragma once
 
+#include "Common/BitUtils.h"
 #include "Common/CommonTypes.h"
 
 class PointerWrap;
@@ -35,6 +36,36 @@ enum StarletInterruptCause
   INT_CAUSE_IPC_STARLET = 0x80000000
 };
 
+enum class GPIO : u32
+{
+  POWER = 0x1,
+  SHUTDOWN = 0x2,
+  FAN = 0x4,
+  DC_DC = 0x8,
+  DI_SPIN = 0x10,
+  SLOT_LED = 0x20,
+  EJECT_BTN = 0x40,
+  SLOT_IN = 0x80,
+  SENSOR_BAR = 0x100,
+  DO_EJECT = 0x200,
+  EEP_CS = 0x400,
+  EEP_CLK = 0x800,
+  EEP_MOSI = 0x1000,
+  EEP_MISO = 0x2000,
+  AVE_SCL = 0x4000,
+  AVE_SDA = 0x8000,
+  DEBUG0 = 0x10000,
+  DEBUG1 = 0x20000,
+  DEBUG2 = 0x40000,
+  DEBUG3 = 0x80000,
+  DEBUG4 = 0x100000,
+  DEBUG5 = 0x200000,
+  DEBUG6 = 0x400000,
+  DEBUG7 = 0x800000,
+};
+
+extern Common::Flags<GPIO> g_gpio_out;
+
 void Init();
 void Reset();
 void Shutdown();

Source/Core/Core/HW/WiimoteEmu/Camera.cpp

@@ -12,6 +12,7 @@
 #include "Common/MathUtil.h"
 #include "Common/Matrix.h"
 
+#include "Core/HW/WII_IPC.h"
 #include "Core/HW/WiimoteCommon/WiimoteReport.h"
 
 namespace WiimoteEmu
@@ -103,6 +104,8 @@ void CameraLogic::Update(const Common::Matrix44& transform)
 
   std::array<CameraPoint, leds.size()> camera_points;
 
+  if (IOS::g_gpio_out[IOS::GPIO::SENSOR_BAR])
+  {
     std::transform(leds.begin(), leds.end(), camera_points.begin(), [&](const Vec3& v) {
       const auto point = camera_view * Vec4(v, 1.0);
 
@@ -120,6 +123,12 @@ void CameraLogic::Update(const Common::Matrix44& transform)
 
       return INVISIBLE_POINT;
     });
+  }
+  else
+  {
+    // Sensor bar is off
+    camera_points.fill(INVISIBLE_POINT);
+  }
 
   // IR data is read from offset 0x37 on real hardware
   auto& data = reg_data.camera_data;