fgo: fgohook finally added

Credits:
- Coburn
- domeori
- Mitsuhide
- OLEG
- rakisaionji

fgohook/ftdi.c

@@ -0,0 +1,55 @@
+/*
+    SEGA 837-14509-02 USB -> Serial Adapter hook
+
+    The 837-15093-06 LED controller is connected to the ALLS with an adapter.
+    This tiny board has a FTDI FT232BL chip, and is referenced in schematics as
+    "USB-SER I/F BD".
+
+    The game queries the presence of the FTDI board itself, followed by a
+    registry check to see which port number is assigned to the FTDI board.
+    If these fail, the "CABINET LED" check on startup will always return "NG".
+*/
+
+#include <windows.h>
+
+#include <assert.h>
+
+#include "fgohook/ftdi.h"
+
+#include "hook/iohook.h"
+
+#include "hooklib/setupapi.h"
+
+#include "util/dprintf.h"
+
+static struct ftdi_config ftdi_cfg;
+
+static HANDLE ftdi_fd;
+
+HRESULT ftdi_hook_init(const struct ftdi_config *cfg)
+{
+    HRESULT hr;
+
+    assert(cfg != NULL);
+
+    if (!cfg->enable) {
+        return S_FALSE;
+    }
+
+    memcpy(&ftdi_cfg, cfg, sizeof(*cfg));
+
+    hr = iohook_open_nul_fd(&ftdi_fd);
+
+    if (FAILED(hr)) {
+        return hr;
+    }
+
+    hr = setupapi_add_phantom_dev(&ftdi_guid, L"$ftdi");
+
+    if (FAILED(hr)) {
+        return hr;
+    }
+
+    dprintf("FTDI: Hook enabled.\n");
+    return S_OK;
+}