/** @file

  Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
  SPDX-License-Identifier: BSD-2-Clause-Patent

**/

#ifndef _EMMC_HCI_H_
#define _EMMC_HCI_H_

//
// EMMC Host Controller MMIO Register Offset
//
#define EMMC_HC_SDMA_ADDR           0x00
#define EMMC_HC_ARG2                0x00
#define EMMC_HC_BLK_SIZE            0x04
#define EMMC_HC_BLK_COUNT           0x06
#define EMMC_HC_ARG1                0x08
#define EMMC_HC_TRANS_MOD           0x0C
#define EMMC_HC_COMMAND             0x0E
#define EMMC_HC_RESPONSE            0x10
#define EMMC_HC_BUF_DAT_PORT        0x20
#define EMMC_HC_PRESENT_STATE       0x24
#define EMMC_HC_HOST_CTRL1          0x28
#define EMMC_HC_POWER_CTRL          0x29
#define EMMC_HC_BLK_GAP_CTRL        0x2A
#define EMMC_HC_WAKEUP_CTRL         0x2B
#define EMMC_HC_CLOCK_CTRL          0x2C
#define EMMC_HC_TIMEOUT_CTRL        0x2E
#define EMMC_HC_SW_RST              0x2F
#define EMMC_HC_NOR_INT_STS         0x30
#define EMMC_HC_ERR_INT_STS         0x32
#define EMMC_HC_NOR_INT_STS_EN      0x34
#define EMMC_HC_ERR_INT_STS_EN      0x36
#define EMMC_HC_NOR_INT_SIG_EN      0x38
#define EMMC_HC_ERR_INT_SIG_EN      0x3A
#define EMMC_HC_AUTO_CMD_ERR_STS    0x3C
#define EMMC_HC_HOST_CTRL2          0x3E
#define EMMC_HC_CAP                 0x40
#define EMMC_HC_MAX_CURRENT_CAP     0x48
#define EMMC_HC_FORCE_EVT_AUTO_CMD  0x50
#define EMMC_HC_FORCE_EVT_ERR_INT   0x52
#define EMMC_HC_ADMA_ERR_STS        0x54
#define EMMC_HC_ADMA_SYS_ADDR       0x58
#define EMMC_HC_PRESET_VAL          0x60
#define EMMC_HC_SHARED_BUS_CTRL     0xE0
#define EMMC_HC_SLOT_INT_STS        0xFC
#define EMMC_HC_CTRL_VER            0xFE

//
// The transfer modes supported by SD Host Controller
// Simplified Spec 3.0 Table 1-2
//
typedef enum {
  EmmcNoData,
  EmmcPioMode,
  EmmcSdmaMode,
  EmmcAdmaMode
} EMMC_HC_TRANSFER_MODE;

//
// The maximum data length of each descriptor line
//
#define ADMA_MAX_DATA_PER_LINE      0x10000
#define EMMC_SDMA_BOUNDARY          512 * 1024
#define EMMC_SDMA_ROUND_UP(x, n)    (((x) + n) & ~(n - 1))

typedef enum {
  EmmcCommandTypeBc,  // Broadcast commands, no response
  EmmcCommandTypeBcr, // Broadcast commands with response
  EmmcCommandTypeAc,  // Addressed(point-to-point) commands
  EmmcCommandTypeAdtc // Addressed(point-to-point) data transfer commands
} EMMC_COMMAND_TYPE;

typedef enum {
  EmmcResponceTypeR1,
  EmmcResponceTypeR1b,
  EmmcResponceTypeR2,
  EmmcResponceTypeR3,
  EmmcResponceTypeR4,
  EmmcResponceTypeR5,
  EmmcResponceTypeR5b,
  EmmcResponceTypeR6,
  EmmcResponceTypeR7
} EMMC_RESPONSE_TYPE;

typedef struct _EMMC_COMMAND_BLOCK {
  UINT16                            CommandIndex;
  UINT32                            CommandArgument;
  UINT32                            CommandType;      // One of the EMMC_COMMAND_TYPE values
  UINT32                            ResponseType;     // One of the EMMC_RESPONSE_TYPE values
} EMMC_COMMAND_BLOCK;

typedef struct _EMMC_STATUS_BLOCK {
  UINT32                            Resp0;
  UINT32                            Resp1;
  UINT32                            Resp2;
  UINT32                            Resp3;
} EMMC_STATUS_BLOCK;

typedef struct _EMMC_COMMAND_PACKET {
  UINT64                            Timeout;
  EMMC_COMMAND_BLOCK                *EmmcCmdBlk;
  EMMC_STATUS_BLOCK                 *EmmcStatusBlk;
  VOID                              *InDataBuffer;
  VOID                              *OutDataBuffer;
  UINT32                            InTransferLength;
  UINT32                            OutTransferLength;
} EMMC_COMMAND_PACKET;

#pragma pack(1)

typedef struct {
  UINT32 Valid:1;
  UINT32 End:1;
  UINT32 Int:1;
  UINT32 Reserved:1;
  UINT32 Act:2;
  UINT32 Reserved1:10;
  UINT32 Length:16;
  UINT32 Address;
} EMMC_HC_ADMA_DESC_LINE;

typedef struct {
  UINT32   TimeoutFreq:6;     // bit 0:5
  UINT32   Reserved:1;        // bit 6
  UINT32   TimeoutUnit:1;     // bit 7
  UINT32   BaseClkFreq:8;     // bit 8:15
  UINT32   MaxBlkLen:2;       // bit 16:17
  UINT32   BusWidth8:1;       // bit 18
  UINT32   Adma2:1;           // bit 19
  UINT32   Reserved2:1;       // bit 20
  UINT32   HighSpeed:1;       // bit 21
  UINT32   Sdma:1;            // bit 22
  UINT32   SuspRes:1;         // bit 23
  UINT32   Voltage33:1;       // bit 24
  UINT32   Voltage30:1;       // bit 25
  UINT32   Voltage18:1;       // bit 26
  UINT32   Reserved3:1;       // bit 27
  UINT32   SysBus64:1;        // bit 28
  UINT32   AsyncInt:1;        // bit 29
  UINT32   SlotType:2;        // bit 30:31
  UINT32   Sdr50:1;           // bit 32
  UINT32   Sdr104:1;          // bit 33
  UINT32   Ddr50:1;           // bit 34
  UINT32   Reserved4:1;       // bit 35
  UINT32   DriverTypeA:1;     // bit 36
  UINT32   DriverTypeC:1;     // bit 37
  UINT32   DriverTypeD:1;     // bit 38
  UINT32   DriverType4:1;     // bit 39
  UINT32   TimerCount:4;      // bit 40:43
  UINT32   Reserved5:1;       // bit 44
  UINT32   TuningSDR50:1;     // bit 45
  UINT32   RetuningMod:2;     // bit 46:47
  UINT32   ClkMultiplier:8;   // bit 48:55
  UINT32   Reserved6:7;       // bit 56:62
  UINT32   Hs400:1;           // bit 63
} EMMC_HC_SLOT_CAP;

#pragma pack()

/**
  Software reset the specified EMMC host controller and enable all interrupts.

  @param[in] Bar            The mmio base address of the slot to be accessed.

  @retval EFI_SUCCESS       The software reset executes successfully.
  @retval Others            The software reset fails.

**/
EFI_STATUS
EmmcPeimHcReset (
  IN UINTN                  Bar
  );

/**
  Set all interrupt status bits in Normal and Error Interrupt Status Enable
  register.

  @param[in] Bar            The mmio base address of the slot to be accessed.

  @retval EFI_SUCCESS       The operation executes successfully.
  @retval Others            The operation fails.

**/
EFI_STATUS
EmmcPeimHcEnableInterrupt (
  IN UINTN                  Bar
  );

/**
  Get the capability data from the specified slot.

  @param[in]  Bar             The mmio base address of the slot to be accessed.
  @param[out] Capability      The buffer to store the capability data.

  @retval EFI_SUCCESS         The operation executes successfully.
  @retval Others              The operation fails.

**/
EFI_STATUS
EmmcPeimHcGetCapability (
  IN     UINTN              Bar,
     OUT EMMC_HC_SLOT_CAP   *Capability
  );

/**
  Detect whether there is a EMMC card attached at the specified EMMC host controller
  slot.

  Refer to SD Host Controller Simplified spec 3.0 Section 3.1 for details.

  @param[in]  Bar           The mmio base address of the slot to be accessed.

  @retval EFI_SUCCESS       There is a EMMC card attached.
  @retval EFI_NO_MEDIA      There is not a EMMC card attached.
  @retval Others            The detection fails.

**/
EFI_STATUS
EmmcPeimHcCardDetect (
  IN UINTN                  Bar
  );

/**
  Initial EMMC host controller with lowest clock frequency, max power and max timeout value
  at initialization.

  @param[in] Bar            The mmio base address of the slot to be accessed.

  @retval EFI_SUCCESS       The host controller is initialized successfully.
  @retval Others            The host controller isn't initialized successfully.

**/
EFI_STATUS
EmmcPeimHcInitHost (
  IN UINTN                  Bar
  );

/**
  Send command SWITCH to the EMMC device to switch the mode of operation of the
  selected Device or modifies the EXT_CSD registers.

  Refer to EMMC Electrical Standard Spec 5.1 Section 6.10.4 for details.

  @param[in] Slot           The slot number of the Emmc card to send the command to.
  @param[in] Access         The access mode of SWTICH command.
  @param[in] Index          The offset of the field to be access.
  @param[in] Value          The value to be set to the specified field of EXT_CSD register.
  @param[in] CmdSet         The value of CmdSet field of EXT_CSD register.

  @retval EFI_SUCCESS       The operation is done correctly.
  @retval Others            The operation fails.

**/
EFI_STATUS
EmmcPeimSwitch (
  IN EMMC_PEIM_HC_SLOT                  *Slot,
  IN UINT8                              Access,
  IN UINT8                              Index,
  IN UINT8                              Value,
  IN UINT8                              CmdSet
  );

/**
  Send command SET_BLOCK_COUNT to the addressed EMMC device to set the number of
  blocks for the following block read/write cmd.

  Refer to EMMC Electrical Standard Spec 5.1 Section 6.10.4 for details.

  @param[in] Slot           The slot number of the Emmc card to send the command to.
  @param[in] BlockCount     The number of the logical block to access.

  @retval EFI_SUCCESS       The operation is done correctly.
  @retval Others            The operation fails.

**/
EFI_STATUS
EmmcPeimSetBlkCount (
  IN EMMC_PEIM_HC_SLOT              *Slot,
  IN UINT16                         BlockCount
  );

/**
  Send command READ_MULTIPLE_BLOCK/WRITE_MULTIPLE_BLOCK to the addressed EMMC device
  to read/write the specified number of blocks.

  Refer to EMMC Electrical Standard Spec 5.1 Section 6.10.4 for details.

  @param[in] Slot           The slot number of the Emmc card to send the command to.
  @param[in] Lba            The logical block address of starting access.
  @param[in] BlockSize      The block size of specified EMMC device partition.
  @param[in] Buffer         The pointer to the transfer buffer.
  @param[in] BufferSize     The size of transfer buffer.
  @param[in] IsRead         Boolean to show the operation direction.

  @retval EFI_SUCCESS       The operation is done correctly.
  @retval Others            The operation fails.

**/
EFI_STATUS
EmmcPeimRwMultiBlocks (
  IN EMMC_PEIM_HC_SLOT              *Slot,
  IN EFI_LBA                        Lba,
  IN UINT32                         BlockSize,
  IN VOID                           *Buffer,
  IN UINTN                          BufferSize,
  IN BOOLEAN                        IsRead
  );

/**
  Execute EMMC device identification procedure.

  Refer to EMMC Electrical Standard Spec 5.1 Section 6.4 for details.

  @param[in] Slot           The slot number of the Emmc card to send the command to.

  @retval EFI_SUCCESS       There is a EMMC card.
  @retval Others            There is not a EMMC card.

**/
EFI_STATUS
EmmcPeimIdentification (
  IN EMMC_PEIM_HC_SLOT           *Slot
  );

/**
  Free the resource used by the TRB.

  @param[in] Trb        The pointer to the EMMC_TRB instance.

**/
VOID
EmmcPeimFreeTrb (
  IN EMMC_TRB           *Trb
  );

#endif