/** @file

    This file contains URB request, each request is warpped in a
    URB (Usb Request Block).

Copyright (c) 2007 - 2010, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent

**/

#ifndef _EFI_EHCI_URB_H_
#define _EFI_EHCI_URB_H_

typedef struct _EHC_QTD  EHC_QTD;
typedef struct _EHC_QH   EHC_QH;
typedef struct _URB      URB;

//
// Transfer types, used in URB to identify the transfer type
//
#define EHC_CTRL_TRANSFER       0x01
#define EHC_BULK_TRANSFER       0x02
#define EHC_INT_TRANSFER_SYNC   0x04
#define EHC_INT_TRANSFER_ASYNC  0x08

#define EHC_QTD_SIG  SIGNATURE_32 ('U', 'S', 'B', 'T')
#define EHC_QH_SIG   SIGNATURE_32 ('U', 'S', 'B', 'H')
#define EHC_URB_SIG  SIGNATURE_32 ('U', 'S', 'B', 'R')

//
// Hardware related bit definitions
//
#define EHC_TYPE_ITD   0x00
#define EHC_TYPE_QH    0x02
#define EHC_TYPE_SITD  0x04
#define EHC_TYPE_FSTN  0x06

#define QH_NAK_RELOAD   3
#define QH_HSHBW_MULTI  1

#define QTD_MAX_ERR     3
#define QTD_PID_OUTPUT  0x00
#define QTD_PID_INPUT   0x01
#define QTD_PID_SETUP   0x02

#define QTD_STAT_DO_OUT      0
#define QTD_STAT_DO_SS       0
#define QTD_STAT_DO_PING     0x01
#define QTD_STAT_DO_CS       0x02
#define QTD_STAT_TRANS_ERR   0x08
#define QTD_STAT_BABBLE_ERR  0x10
#define QTD_STAT_BUFF_ERR    0x20
#define QTD_STAT_HALTED      0x40
#define QTD_STAT_ACTIVE      0x80
#define QTD_STAT_ERR_MASK    (QTD_STAT_TRANS_ERR | QTD_STAT_BABBLE_ERR | QTD_STAT_BUFF_ERR)

#define QTD_MAX_BUFFER  4
#define QTD_BUF_LEN     4096
#define QTD_BUF_MASK    0x0FFF

#define QH_MICROFRAME_0  0x01
#define QH_MICROFRAME_1  0x02
#define QH_MICROFRAME_2  0x04
#define QH_MICROFRAME_3  0x08
#define QH_MICROFRAME_4  0x10
#define QH_MICROFRAME_5  0x20
#define QH_MICROFRAME_6  0x40
#define QH_MICROFRAME_7  0x80

#define USB_ERR_SHORT_PACKET  0x200

//
// Fill in the hardware link point: pass in a EHC_QH/QH_HW
// pointer to QH_LINK; A EHC_QTD/QTD_HW pointer to QTD_LINK
//
#define QH_LINK(Addr, Type, Term) \
          ((UINT32) ((EHC_LOW_32BIT (Addr) & 0xFFFFFFE0) | (Type) | ((Term) ? 1 : 0)))

#define QTD_LINK(Addr, Term)  QH_LINK((Addr), 0, (Term))

//
// The defination of EHCI hardware used data structure for
// little endian architecture. The QTD and QH structures
// are required to be 32 bytes aligned. Don't add members
// to the head of the associated software strucuture.
//
#pragma pack(1)
typedef struct {
  UINT32    NextQtd;
  UINT32    AltNext;

  UINT32    Status     : 8;
  UINT32    Pid        : 2;
  UINT32    ErrCnt     : 2;
  UINT32    CurPage    : 3;
  UINT32    Ioc        : 1;
  UINT32    TotalBytes : 15;
  UINT32    DataToggle : 1;

  UINT32    Page[5];
  UINT32    PageHigh[5];
} QTD_HW;

typedef struct {
  UINT32    HorizonLink;
  //
  // Endpoint capabilities/Characteristics DWord 1 and DWord 2
  //
  UINT32    DeviceAddr   : 7;
  UINT32    Inactive     : 1;
  UINT32    EpNum        : 4;
  UINT32    EpSpeed      : 2;
  UINT32    DtCtrl       : 1;
  UINT32    ReclaimHead  : 1;
  UINT32    MaxPacketLen : 11;
  UINT32    CtrlEp       : 1;
  UINT32    NakReload    : 4;

  UINT32    SMask        : 8;
  UINT32    CMask        : 8;
  UINT32    HubAddr      : 7;
  UINT32    PortNum      : 7;
  UINT32    Multiplier   : 2;

  //
  // Transaction execution overlay area
  //
  UINT32    CurQtd;
  UINT32    NextQtd;
  UINT32    AltQtd;

  UINT32    Status     : 8;
  UINT32    Pid        : 2;
  UINT32    ErrCnt     : 2;
  UINT32    CurPage    : 3;
  UINT32    Ioc        : 1;
  UINT32    TotalBytes : 15;
  UINT32    DataToggle : 1;

  UINT32    Page[5];
  UINT32    PageHigh[5];
} QH_HW;
#pragma pack()

//
// Endpoint address and its capabilities
//
typedef struct _USB_ENDPOINT {
  UINT8                     DevAddr;
  UINT8                     EpAddr;   // Endpoint address, no direction encoded in
  EFI_USB_DATA_DIRECTION    Direction;
  UINT8                     DevSpeed;
  UINTN                     MaxPacket;
  UINT8                     HubAddr;
  UINT8                     HubPort;
  UINT8                     Toggle;   // Data toggle, not used for control transfer
  UINTN                     Type;
  UINTN                     PollRate; // Polling interval used by EHCI
} USB_ENDPOINT;

//
// Software QTD strcture, this is used to manage all the
// QTD generated from a URB. Don't add fields before QtdHw.
//
struct _EHC_QTD {
  QTD_HW        QtdHw;
  UINT32        Signature;
  LIST_ENTRY    QtdList;             // The list of QTDs to one end point
  UINT8         *Data;               // Buffer of the original data
  UINTN         DataLen;             // Original amount of data in this QTD
};

//
// Software QH structure. All three different transaction types
// supported by UEFI USB, that is the control/bulk/interrupt
// transfers use the queue head and queue token strcuture.
//
// Interrupt QHs are linked to periodic frame list in the reversed
// 2^N tree. Each interrupt QH is linked to the list starting at
// frame 0. There is a dummy interrupt QH linked to each frame as
// a sentinental whose polling interval is 1. Synchronous interrupt
// transfer is linked after this dummy QH.
//
// For control/bulk transfer, only synchronous (in the sense of UEFI)
// transfer is supported. A dummy QH is linked to EHCI AsyncListAddr
// as the reclamation header. New transfer is inserted after this QH.
//
struct _EHC_QH {
  QH_HW         QhHw;
  UINT32        Signature;
  EHC_QH        *NextQh;              // The queue head pointed to by horizontal link
  LIST_ENTRY    Qtds;                 // The list of QTDs to this queue head
  UINTN         Interval;
};

//
// URB (Usb Request Block) contains information for all kinds of
// usb requests.
//
struct _URB {
  UINT32                             Signature;
  LIST_ENTRY                         UrbList;

  //
  // Transaction information
  //
  USB_ENDPOINT                       Ep;
  EFI_USB_DEVICE_REQUEST             *Request;    // Control transfer only
  VOID                               *RequestPhy; // Address of the mapped request
  VOID                               *RequestMap;
  VOID                               *Data;
  UINTN                              DataLen;
  VOID                               *DataPhy;  // Address of the mapped user data
  VOID                               *DataMap;
  EFI_ASYNC_USB_TRANSFER_CALLBACK    Callback;
  VOID                               *Context;

  //
  // Schedule data
  //
  EHC_QH                             *Qh;

  //
  // Transaction result
  //
  UINT32                             Result;
  UINTN                              Completed; // completed data length
  UINT8                              DataToggle;
};

/**
  Create a single QTD to hold the data.

  @param  Ehc        The EHCI device.
  @param  Data       The cpu memory address of current data not associated with a QTD.
  @param  DataPhy    The pci bus address of current data not associated with a QTD.
  @param  DataLen    The length of the data.
  @param  PktId      Packet ID to use in the QTD.
  @param  Toggle     Data toggle to use in the QTD.
  @param  MaxPacket  Maximu packet length of the endpoint.

  @return Created QTD or NULL if failed to create one.

**/
EHC_QTD *
EhcCreateQtd (
  IN USB2_HC_DEV  *Ehc,
  IN UINT8        *Data,
  IN UINT8        *DataPhy,
  IN UINTN        DataLen,
  IN UINT8        PktId,
  IN UINT8        Toggle,
  IN UINTN        MaxPacket
  );

/**
  Allocate and initialize a EHCI queue head.

  @param  Ehci       The EHCI device.
  @param  Ep         The endpoint to create queue head for.

  @return Created queue head or NULL if failed to create one.

**/
EHC_QH *
EhcCreateQh (
  IN USB2_HC_DEV   *Ehci,
  IN USB_ENDPOINT  *Ep
  );

/**
  Free an allocated URB. It is possible for it to be partially inited.

  @param  Ehc        The EHCI device.
  @param  Urb        The URB to free.

**/
VOID
EhcFreeUrb (
  IN USB2_HC_DEV  *Ehc,
  IN URB          *Urb
  );

/**
  Create a new URB and its associated QTD.

  @param  Ehc        The EHCI device.
  @param  DevAddr    The device address.
  @param  EpAddr     Endpoint addrress & its direction.
  @param  DevSpeed   The device speed.
  @param  Toggle     Initial data toggle to use.
  @param  MaxPacket  The max packet length of the endpoint.
  @param  Hub        The transaction translator to use.
  @param  Type       The transaction type.
  @param  Request    The standard USB request for control transfer.
  @param  Data       The user data to transfer.
  @param  DataLen    The length of data buffer.
  @param  Callback   The function to call when data is transferred.
  @param  Context    The context to the callback.
  @param  Interval   The interval for interrupt transfer.

  @return Created URB or NULL.

**/
URB *
EhcCreateUrb (
  IN USB2_HC_DEV                         *Ehc,
  IN UINT8                               DevAddr,
  IN UINT8                               EpAddr,
  IN UINT8                               DevSpeed,
  IN UINT8                               Toggle,
  IN UINTN                               MaxPacket,
  IN EFI_USB2_HC_TRANSACTION_TRANSLATOR  *Hub,
  IN UINTN                               Type,
  IN EFI_USB_DEVICE_REQUEST              *Request,
  IN VOID                                *Data,
  IN UINTN                               DataLen,
  IN EFI_ASYNC_USB_TRANSFER_CALLBACK     Callback,
  IN VOID                                *Context,
  IN UINTN                               Interval
  );

#endif