/** @file

  This file contains the register definition of XHCI host controller.

Copyright (c) 2011 - 2017, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution.  The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php

THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

**/

#ifndef _EFI_XHCI_REG_H_
#define _EFI_XHCI_REG_H_

#define PCI_IF_XHCI                 0x30

//
// PCI Configuration Registers
//
#define XHC_BAR_INDEX               0x00

#define XHC_PCI_BAR_OFFSET          0x10       // Memory Bar Register Offset
#define XHC_PCI_BAR_MASK            0xFFFF     // Memory Base Address Mask

#define USB_HUB_CLASS_CODE          0x09
#define USB_HUB_SUBCLASS_CODE       0x00

#define XHC_CAP_USB_LEGACY          0x01
#define XHC_CAP_USB_DEBUG           0x0A

//============================================//
//           XHCI register offset             //
//============================================//

//
// Capability registers offset
//
#define XHC_CAPLENGTH_OFFSET               0x00 // Capability register length offset
#define XHC_HCIVERSION_OFFSET              0x02 // Interface Version Number 02-03h
#define XHC_HCSPARAMS1_OFFSET              0x04 // Structural Parameters 1
#define XHC_HCSPARAMS2_OFFSET              0x08 // Structural Parameters 2
#define XHC_HCSPARAMS3_OFFSET              0x0c // Structural Parameters 3
#define XHC_HCCPARAMS_OFFSET               0x10 // Capability Parameters
#define XHC_DBOFF_OFFSET                   0x14 // Doorbell Offset
#define XHC_RTSOFF_OFFSET                  0x18 // Runtime Register Space Offset

//
// Operational registers offset
//
#define XHC_USBCMD_OFFSET                  0x0000 // USB Command Register Offset
#define XHC_USBSTS_OFFSET                  0x0004 // USB Status Register Offset
#define XHC_PAGESIZE_OFFSET                0x0008 // USB Page Size Register Offset
#define XHC_DNCTRL_OFFSET                  0x0014 // Device Notification Control Register Offset
#define XHC_CRCR_OFFSET                    0x0018 // Command Ring Control Register Offset
#define XHC_DCBAAP_OFFSET                  0x0030 // Device Context Base Address Array Pointer Register Offset
#define XHC_CONFIG_OFFSET                  0x0038 // Configure Register Offset
#define XHC_PORTSC_OFFSET                  0x0400 // Port Status and Control Register Offset

//
// Runtime registers offset
//
#define XHC_MFINDEX_OFFSET                 0x00 // Microframe Index Register Offset
#define XHC_IMAN_OFFSET                    0x20 // Interrupter X Management Register Offset
#define XHC_IMOD_OFFSET                    0x24 // Interrupter X Moderation Register Offset
#define XHC_ERSTSZ_OFFSET                  0x28 // Event Ring Segment Table Size Register Offset
#define XHC_ERSTBA_OFFSET                  0x30 // Event Ring Segment Table Base Address Register Offset
#define XHC_ERDP_OFFSET                    0x38 // Event Ring Dequeue Pointer Register Offset

//
// Debug registers offset
//
#define XHC_DC_DCCTRL                      0x20

#define USBLEGSP_BIOS_SEMAPHORE            BIT16 // HC BIOS Owned Semaphore
#define USBLEGSP_OS_SEMAPHORE              BIT24 // HC OS Owned Semaphore

#pragma pack (1)
typedef struct {
  UINT8                   MaxSlots;       // Number of Device Slots
  UINT16                  MaxIntrs:11;    // Number of Interrupters
  UINT16                  Rsvd:5;
  UINT8                   MaxPorts;       // Number of Ports
} HCSPARAMS1;

//
// Structural Parameters 1 Register Bitmap Definition
//
typedef union {
  UINT32                  Dword;
  HCSPARAMS1              Data;
} XHC_HCSPARAMS1;

typedef struct {
  UINT32                  Ist:4;          // Isochronous Scheduling Threshold
  UINT32                  Erst:4;         // Event Ring Segment Table Max
  UINT32                  Rsvd:13;
  UINT32                  ScratchBufHi:5; // Max Scratchpad Buffers Hi
  UINT32                  Spr:1;          // Scratchpad Restore
  UINT32                  ScratchBufLo:5; // Max Scratchpad Buffers Lo
} HCSPARAMS2;

//
// Structural Parameters 2 Register Bitmap Definition
//
typedef union {
  UINT32                  Dword;
  HCSPARAMS2              Data;
} XHC_HCSPARAMS2;

typedef struct {
  UINT16                  Ac64:1;        // 64-bit Addressing Capability
  UINT16                  Bnc:1;         // BW Negotiation Capability
  UINT16                  Csz:1;         // Context Size
  UINT16                  Ppc:1;         // Port Power Control
  UINT16                  Pind:1;        // Port Indicators
  UINT16                  Lhrc:1;        // Light HC Reset Capability
  UINT16                  Ltc:1;         // Latency Tolerance Messaging Capability
  UINT16                  Nss:1;         // No Secondary SID Support
  UINT16                  Pae:1;         // Parse All Event Data
  UINT16                  Rsvd:3;
  UINT16                  MaxPsaSize:4;  // Maximum Primary Stream Array Size
  UINT16                  ExtCapReg;     // xHCI Extended Capabilities Pointer
} HCCPARAMS;

//
// Capability Parameters Register Bitmap Definition
//
typedef union {
  UINT32                  Dword;
  HCCPARAMS               Data;
} XHC_HCCPARAMS;

#pragma pack ()

//
// Register Bit Definition
//
#define XHC_USBCMD_RUN                     BIT0  // Run/Stop
#define XHC_USBCMD_RESET                   BIT1  // Host Controller Reset
#define XHC_USBCMD_INTE                    BIT2  // Interrupter Enable
#define XHC_USBCMD_HSEE                    BIT3  // Host System Error Enable

#define XHC_USBSTS_HALT                    BIT0  // Host Controller Halted
#define XHC_USBSTS_HSE                     BIT2  // Host System Error
#define XHC_USBSTS_EINT                    BIT3  // Event Interrupt
#define XHC_USBSTS_PCD                     BIT4  // Port Change Detect
#define XHC_USBSTS_SSS                     BIT8  // Save State Status
#define XHC_USBSTS_RSS                     BIT9  // Restore State Status
#define XHC_USBSTS_SRE                     BIT10 // Save/Restore Error
#define XHC_USBSTS_CNR                     BIT11 // Host Controller Not Ready
#define XHC_USBSTS_HCE                     BIT12 // Host Controller Error

#define XHC_PAGESIZE_MASK                  0xFFFF // Page Size

#define XHC_CRCR_RCS                       BIT0  // Ring Cycle State
#define XHC_CRCR_CS                        BIT1  // Command Stop
#define XHC_CRCR_CA                        BIT2  // Command Abort
#define XHC_CRCR_CRR                       BIT3  // Command Ring Running

#define XHC_CONFIG_MASK                    0xFF  // Command Ring Running

#define XHC_PORTSC_CCS                     BIT0  // Current Connect Status
#define XHC_PORTSC_PED                     BIT1  // Port Enabled/Disabled
#define XHC_PORTSC_OCA                     BIT3  // Over-current Active
#define XHC_PORTSC_RESET                   BIT4  // Port Reset
#define XHC_PORTSC_PLS                     (BIT5|BIT6|BIT7|BIT8)     // Port Link State
#define XHC_PORTSC_PP                      BIT9  // Port Power
#define XHC_PORTSC_PS                      (BIT10|BIT11|BIT12)       // Port Speed
#define XHC_PORTSC_LWS                     BIT16 // Port Link State Write Strobe
#define XHC_PORTSC_CSC                     BIT17 // Connect Status Change
#define XHC_PORTSC_PEC                     BIT18 // Port Enabled/Disabled Change
#define XHC_PORTSC_WRC                     BIT19 // Warm Port Reset Change
#define XHC_PORTSC_OCC                     BIT20 // Over-Current Change
#define XHC_PORTSC_PRC                     BIT21 // Port Reset Change
#define XHC_PORTSC_PLC                     BIT22 // Port Link State Change
#define XHC_PORTSC_CEC                     BIT23 // Port Config Error Change
#define XHC_PORTSC_CAS                     BIT24 // Cold Attach Status

#define XHC_HUB_PORTSC_CCS                 BIT0  // Hub's Current Connect Status
#define XHC_HUB_PORTSC_PED                 BIT1  // Hub's Port Enabled/Disabled
#define XHC_HUB_PORTSC_OCA                 BIT3  // Hub's Over-current Active
#define XHC_HUB_PORTSC_RESET               BIT4  // Hub's Port Reset
#define XHC_HUB_PORTSC_PP                  BIT9  // Hub's Port Power
#define XHC_HUB_PORTSC_CSC                 BIT16 // Hub's Connect Status Change
#define XHC_HUB_PORTSC_PEC                 BIT17 // Hub's Port Enabled/Disabled Change
#define XHC_HUB_PORTSC_OCC                 BIT19 // Hub's Over-Current Change
#define XHC_HUB_PORTSC_PRC                 BIT20 // Hub's Port Reset Change
#define XHC_HUB_PORTSC_BHRC                BIT21 // Hub's Port Warm Reset Change
#define XHC_IMAN_IP                        BIT0  // Interrupt Pending
#define XHC_IMAN_IE                        BIT1  // Interrupt Enable

#define XHC_IMODI_MASK                     0x0000FFFF  // Interrupt Moderation Interval
#define XHC_IMODC_MASK                     0xFFFF0000  // Interrupt Moderation Counter

//
//  Hub Class Feature Selector for Clear Port Feature Request
//  It's the extension of hub class feature selector of USB 2.0 in USB 3.0 Spec.
//  For more details, Please refer to USB 3.0 Spec Table 10-7.
//
typedef enum {
  Usb3PortBHPortReset          = 28,
  Usb3PortBHPortResetChange    = 29
} XHC_PORT_FEATURE;

//
// Structure to map the hardware port states to the
// UEFI's port states.
//
typedef struct {
  UINT32                  HwState;
  UINT16                  UefiState;
} USB_PORT_STATE_MAP;

//
// Structure to map the hardware port states to feature selector for clear port feature request.
//
typedef struct {
  UINT32                  HwState;
  UINT16                  Selector;
} USB_CLEAR_PORT_MAP;

/**
  Read 1-byte width XHCI capability register.

  @param  Xhc          The XHCI Instance.
  @param  Offset       The offset of the 1-byte width capability register.

  @return The register content read.
  @retval If err, return 0xFFFF.

**/
UINT8
XhcReadCapReg8 (
  IN  USB_XHCI_INSTANCE   *Xhc,
  IN  UINT32              Offset
  );

/**
  Read 4-bytes width XHCI capability register.

  @param  Xhc          The XHCI Instance.
  @param  Offset       The offset of the 4-bytes width capability register.

  @return The register content read.
  @retval If err, return 0xFFFFFFFF.

**/
UINT32
XhcReadCapReg (
  IN  USB_XHCI_INSTANCE   *Xhc,
  IN  UINT32              Offset
  );

/**
  Read 4-bytes width XHCI Operational register.

  @param  Xhc          The XHCI Instance.
  @param  Offset       The offset of the 4-bytes width operational register.

  @return The register content read.
  @retval If err, return 0xFFFFFFFF.

**/
UINT32
XhcReadOpReg (
  IN  USB_XHCI_INSTANCE   *Xhc,
  IN  UINT32              Offset
  );

/**
  Write the data to the 4-bytes width XHCI operational register.

  @param  Xhc      The XHCI Instance.
  @param  Offset   The offset of the 4-bytes width operational register.
  @param  Data     The data to write.

**/
VOID
XhcWriteOpReg (
  IN USB_XHCI_INSTANCE    *Xhc,
  IN UINT32               Offset,
  IN UINT32               Data
  );

/**
  Write the data to the 2-bytes width XHCI operational register.

  @param  Xhc          The XHCI Instance.
  @param  Offset       The offset of the 2-bytes width operational register.
  @param  Data         The data to write.

**/
VOID
XhcWriteOpReg16 (
  IN USB_XHCI_INSTANCE    *Xhc,
  IN UINT32               Offset,
  IN UINT16               Data
  );

/**
  Read XHCI runtime register.

  @param  Xhc          The XHCI Instance.
  @param  Offset       The offset of the runtime register.

  @return The register content read

**/
UINT32
XhcReadRuntimeReg (
  IN  USB_XHCI_INSTANCE   *Xhc,
  IN  UINT32              Offset
  );

/**
  Write the data to the XHCI runtime register.

  @param  Xhc          The XHCI Instance.
  @param  Offset       The offset of the runtime register.
  @param  Data         The data to write.

**/
VOID
XhcWriteRuntimeReg (
  IN USB_XHCI_INSTANCE    *Xhc,
  IN UINT32               Offset,
  IN UINT32               Data
  );

/**
  Read XHCI door bell register.

  @param  Xhc          The XHCI Instance.
  @param  Offset       The offset of the door bell register.

  @return The register content read

**/
UINT32
XhcReadDoorBellReg (
  IN  USB_XHCI_INSTANCE   *Xhc,
  IN  UINT32              Offset
  );

/**
  Write the data to the XHCI door bell register.

  @param  Xhc          The XHCI Instance.
  @param  Offset       The offset of the door bell register.
  @param  Data         The data to write.

**/
VOID
XhcWriteDoorBellReg (
  IN USB_XHCI_INSTANCE    *Xhc,
  IN UINT32               Offset,
  IN UINT32               Data
  );

/**
  Set one bit of the operational register while keeping other bits.

  @param  Xhc          The XHCI Instance.
  @param  Offset       The offset of the operational register.
  @param  Bit          The bit mask of the register to set.

**/
VOID
XhcSetOpRegBit (
  IN USB_XHCI_INSTANCE    *Xhc,
  IN UINT32               Offset,
  IN UINT32               Bit
  );

/**
  Clear one bit of the operational register while keeping other bits.

  @param  Xhc          The XHCI Instance.
  @param  Offset       The offset of the operational register.
  @param  Bit          The bit mask of the register to clear.

**/
VOID
XhcClearOpRegBit (
  IN USB_XHCI_INSTANCE    *Xhc,
  IN UINT32               Offset,
  IN UINT32               Bit
  );

/**
  Wait the operation register's bit as specified by Bit
  to be set (or clear).

  @param  Xhc          The XHCI Instance.
  @param  Offset       The offset of the operational register.
  @param  Bit          The bit of the register to wait for.
  @param  WaitToSet    Wait the bit to set or clear.
  @param  Timeout      The time to wait before abort (in millisecond, ms).

  @retval EFI_SUCCESS  The bit successfully changed by host controller.
  @retval EFI_TIMEOUT  The time out occurred.

**/
EFI_STATUS
XhcWaitOpRegBit (
  IN USB_XHCI_INSTANCE    *Xhc,
  IN UINT32               Offset,
  IN UINT32               Bit,
  IN BOOLEAN              WaitToSet,
  IN UINT32               Timeout
  );

/**
  Read XHCI runtime register.

  @param  Xhc          The XHCI Instance.
  @param  Offset       The offset of the runtime register.

  @return The register content read

**/
UINT32
XhcReadRuntimeReg (
  IN  USB_XHCI_INSTANCE   *Xhc,
  IN  UINT32              Offset
  );

/**
  Write the data to the XHCI runtime register.

  @param  Xhc          The XHCI Instance.
  @param  Offset       The offset of the runtime register.
  @param  Data         The data to write.

**/
VOID
XhcWriteRuntimeReg (
  IN USB_XHCI_INSTANCE    *Xhc,
  IN UINT32               Offset,
  IN UINT32               Data
  );

/**
  Set one bit of the runtime register while keeping other bits.

  @param  Xhc          The XHCI Instance.
  @param  Offset       The offset of the runtime register.
  @param  Bit          The bit mask of the register to set.

**/
VOID
XhcSetRuntimeRegBit (
  IN USB_XHCI_INSTANCE    *Xhc,
  IN UINT32               Offset,
  IN UINT32               Bit
  );

/**
  Clear one bit of the runtime register while keeping other bits.

  @param  Xhc          The XHCI Instance.
  @param  Offset       The offset of the runtime register.
  @param  Bit          The bit mask of the register to set.

**/
VOID
XhcClearRuntimeRegBit (
  IN USB_XHCI_INSTANCE    *Xhc,
  IN UINT32               Offset,
  IN UINT32               Bit
  );

/**
  Read XHCI extended capability register.

  @param  Xhc          The XHCI Instance.
  @param  Offset       The offset of the extended capability register.

  @return The register content read

**/
UINT32
XhcReadExtCapReg (
  IN  USB_XHCI_INSTANCE   *Xhc,
  IN  UINT32              Offset
  );

/**
  Whether the XHCI host controller is halted.

  @param  Xhc     The XHCI Instance.

  @retval TRUE    The controller is halted.
  @retval FALSE   It isn't halted.

**/
BOOLEAN
XhcIsHalt (
  IN USB_XHCI_INSTANCE    *Xhc
  );

/**
  Whether system error occurred.

  @param  Xhc      The XHCI Instance.

  @retval TRUE     System error happened.
  @retval FALSE    No system error.

**/
BOOLEAN
XhcIsSysError (
  IN USB_XHCI_INSTANCE    *Xhc
  );

/**
  Reset the XHCI host controller.

  @param  Xhc          The XHCI Instance.
  @param  Timeout      Time to wait before abort (in millisecond, ms).

  @retval EFI_SUCCESS  The XHCI host controller is reset.
  @return Others       Failed to reset the XHCI before Timeout.

**/
EFI_STATUS
XhcResetHC (
  IN USB_XHCI_INSTANCE    *Xhc,
  IN UINT32               Timeout
  );

/**
  Halt the XHCI host controller.

  @param  Xhc          The XHCI Instance.
  @param  Timeout      Time to wait before abort (in millisecond, ms).

  @return EFI_SUCCESS  The XHCI host controller is halt.
  @return EFI_TIMEOUT  Failed to halt the XHCI before Timeout.

**/
EFI_STATUS
XhcHaltHC (
  IN USB_XHCI_INSTANCE   *Xhc,
  IN UINT32              Timeout
  );

/**
  Set the XHCI host controller to run.

  @param  Xhc          The XHCI Instance.
  @param  Timeout      Time to wait before abort (in millisecond, ms).

  @return EFI_SUCCESS  The XHCI host controller is running.
  @return EFI_TIMEOUT  Failed to set the XHCI to run before Timeout.

**/
EFI_STATUS
XhcRunHC (
  IN USB_XHCI_INSTANCE    *Xhc,
  IN UINT32               Timeout
  );

/**
  Calculate the offset of the XHCI capability.

  @param  Xhc     The XHCI Instance.
  @param  CapId   The XHCI Capability ID.

  @return The offset of XHCI legacy support capability register.

**/
UINT32
XhcGetCapabilityAddr (
  IN USB_XHCI_INSTANCE    *Xhc,
  IN UINT8                CapId
  );

#endif