// Copyright 2024-2025, Amlal El Mahrouss (amlal@nekernel.org)
// Licensed under the Apache License, Version 2.0 (see LICENSE file)
// Official repository: https://github.com/ne-foss-org/nekernel

#ifndef XHCI_XHCI_H
#define XHCI_XHCI_H

#include <NeKit/Config.h>

#define kUSBCommand (UInt16) 0x0
#define kUSBStatus (UInt16) 0x2
#define kUSBInterruptEnable (UInt16) 0x4
#define kUSBFrameNum (UInt16) 0x6
#define kUSBFrameListBaseAddress (UInt16) 0x8
#define kUSBFrameModifyStart (UInt16) 0xC
#define kUSBPort1StatusCtrl (UInt16) 0x10
#define kUSBPort2StatusCtrl (UInt16) 0x12

namespace Kernel {
typedef struct USBCommandRegister final {
  UInt8 mReserved[8];  // Reserved
  UInt8 mMaxPacket;    //  	0 = Max packet size 32 bits 1 = Max packet size 64 bits
  UInt8 mConfigure;
  UInt8 mSoftwareDebug;
  UInt8 mGlobalResume;
  UInt8 mGlobalSuspend;
  UInt8 mHostCtrlReset;
  UInt8 mRun;  //  	1 = Controller execute frame list entries
} USBCommandRegister;

typedef struct USBStatusRegister final {
  UInt8 mReserved[8];  // Reserved
  UInt8 mHalted;       //  1 = bit 0 in CMD is zero 0 = bit 0 in CMD is 1
  UInt8 mProcessError;
  UInt8 mSystemError;
  UInt8 mResumeDetected;
  UInt8 mErrorInterrupt;
  UInt8 mInterrupt;
} USBStatusRegister;

typedef struct USBInterruptEnableRegister final {
  UInt8 mReserved[4];  // Reserved
  UInt8 mShortPacket;  //  1=Enable interrupt 0=Disable interrupt
  UInt8 mComplete;     //  1=Enable interrupt 0=Disable interrupt
  UInt8 mResume;       //  1=Enable interrupt 0=Disable interrupt
  UInt8 mTimeoutCRC;   //  1=Enable interrupt 0=Disable interrupt
} USBInterruptEnableRegister;

/*
  Some terminology:

  Frame Number: Number of processed entry of the Frame List.
  Frame List Base Address:
  32-bit physical adress of Frame List. Remember that first 12 bytes are
   always 0. The Frame List must contain 1024 entries.
*/
}  // namespace Kernel

#endif