From d0d22529f9ca23f86bc388830ae99c7ab996dfe4 Mon Sep 17 00:00:00 2001
From: DH <dh.rpcs3@gmail.com>
Date: Sat, 31 Aug 2024 23:55:47 +0300
Subject: [PATCH] iodev: add kayman/reg device stub

---
 rpcsx-os/CMakeLists.txt       |  1 +
 rpcsx-os/io-devices.hpp       |  1 +
 rpcsx-os/iodev/cayman_reg.cpp | 39 +++++++++++++++++++++++++++++++++++
 rpcsx-os/main.cpp             |  1 +
 4 files changed, 42 insertions(+)
 create mode 100644 rpcsx-os/iodev/cayman_reg.cpp

diff --git a/rpcsx-os/CMakeLists.txt b/rpcsx-os/CMakeLists.txt
index d9ecd0b6a..47e382cde 100644
--- a/rpcsx-os/CMakeLists.txt
+++ b/rpcsx-os/CMakeLists.txt
@@ -48,6 +48,7 @@ add_executable(rpcsx-os
   iodev/sshot.cpp
   iodev/lvdctl.cpp
   iodev/icc_power.cpp
+  iodev/cayman_reg.cpp
 
   main.cpp
   backtrace.cpp
diff --git a/rpcsx-os/io-devices.hpp b/rpcsx-os/io-devices.hpp
index 76319ff9f..b10045a87 100644
--- a/rpcsx-os/io-devices.hpp
+++ b/rpcsx-os/io-devices.hpp
@@ -48,3 +48,4 @@ IoDevice *createSrtcCharacterDevice();
 IoDevice *createScreenShotCharacterDevice();
 IoDevice *createLvdCtlCharacterDevice();
 IoDevice *createIccPowerCharacterDevice();
+IoDevice *createCaymanRegCharacterDevice();
diff --git a/rpcsx-os/iodev/cayman_reg.cpp b/rpcsx-os/iodev/cayman_reg.cpp
new file mode 100644
index 000000000..d8bca864a
--- /dev/null
+++ b/rpcsx-os/iodev/cayman_reg.cpp
@@ -0,0 +1,39 @@
+#include "io-device.hpp"
+#include "orbis/KernelAllocator.hpp"
+#include "orbis/file.hpp"
+#include "orbis/thread/Thread.hpp"
+#include "orbis/utils/Logs.hpp"
+
+struct CaymanRegDevice : IoDevice {
+  orbis::ErrorCode open(orbis::Ref<orbis::File> *file, const char *path,
+                        std::uint32_t flags, std::uint32_t mode,
+                        orbis::Thread *thread) override;
+};
+
+static orbis::ErrorCode cayman_reg_ioctl(orbis::File *file,
+                                        std::uint64_t request, void *argp,
+                                        orbis::Thread *thread) {
+  ORBIS_LOG_FATAL("Unhandled cayman_reg ioctl", request);
+  thread->where();
+  return {};
+}
+
+static const orbis::FileOps fileOps = {
+    .ioctl = cayman_reg_ioctl,
+};
+
+orbis::ErrorCode CaymanRegDevice::open(orbis::Ref<orbis::File> *file,
+                                      const char *path, std::uint32_t flags,
+                                      std::uint32_t mode,
+                                      orbis::Thread *thread) {
+  auto newFile = orbis::knew<orbis::File>();
+  newFile->ops = &fileOps;
+  newFile->device = this;
+
+  *file = newFile;
+  return {};
+}
+
+IoDevice *createCaymanRegCharacterDevice() {
+  return orbis::knew<CaymanRegDevice>();
+}
diff --git a/rpcsx-os/main.cpp b/rpcsx-os/main.cpp
index 3b36f872e..7143a68b7 100644
--- a/rpcsx-os/main.cpp
+++ b/rpcsx-os/main.cpp
@@ -474,6 +474,7 @@ static void ps4InitDev() {
   rx::vfs::addDevice("lvdctl", createLvdCtlCharacterDevice());
   rx::vfs::addDevice("lvd0", createHddCharacterDevice(0x100000000));
   rx::vfs::addDevice("icc_power", createIccPowerCharacterDevice());
+  rx::vfs::addDevice("cayman/reg", createCaymanRegCharacterDevice());
 
   // mbus->emitEvent({
   //     .system = 2,