system76-edk2/EmbeddedPkg/Include/Protocol/MmcHost.h

/** @file
  Definition of the MMC Host Protocol

  Copyright (c) 2011-2014, ARM Limited. All rights reserved.

  SPDX-License-Identifier: BSD-2-Clause-Patent

**/

#ifndef __MMC_HOST_H__
#define __MMC_HOST_H__

///
/// Global ID for the MMC Host Protocol
///
#define EMBEDDED_MMC_HOST_PROTOCOL_GUID \
  { 0x3e591c00, 0x9e4a, 0x11df, {0x92, 0x44, 0x00, 0x02, 0xA5, 0xD5, 0xC5, 0x1B } }

#define MMC_RESPONSE_TYPE_R1   0
#define MMC_RESPONSE_TYPE_R1b  0
#define MMC_RESPONSE_TYPE_R2   1
#define MMC_RESPONSE_TYPE_R3   0
#define MMC_RESPONSE_TYPE_R6   0
#define MMC_RESPONSE_TYPE_R7   0
#define MMC_RESPONSE_TYPE_OCR  0
#define MMC_RESPONSE_TYPE_CID  1
#define MMC_RESPONSE_TYPE_CSD  1
#define MMC_RESPONSE_TYPE_RCA  0

typedef UINT32 MMC_RESPONSE_TYPE;

typedef UINT32 MMC_CMD;

#define MMC_CMD_WAIT_RESPONSE    (1 << 16)
#define MMC_CMD_LONG_RESPONSE    (1 << 17)
#define MMC_CMD_NO_CRC_RESPONSE  (1 << 18)

#define MMC_INDX(Index)       ((Index) & 0xFFFF)
#define MMC_GET_INDX(MmcCmd)  ((MmcCmd) & 0xFFFF)

#define MMC_CMD0    (MMC_INDX(0) | MMC_CMD_NO_CRC_RESPONSE)
#define MMC_CMD1    (MMC_INDX(1) | MMC_CMD_WAIT_RESPONSE | MMC_CMD_NO_CRC_RESPONSE)
#define MMC_CMD2    (MMC_INDX(2) | MMC_CMD_WAIT_RESPONSE | MMC_CMD_LONG_RESPONSE)
#define MMC_CMD3    (MMC_INDX(3) | MMC_CMD_WAIT_RESPONSE)
#define MMC_CMD5    (MMC_INDX(5) | MMC_CMD_WAIT_RESPONSE | MMC_CMD_NO_CRC_RESPONSE)
#define MMC_CMD6    (MMC_INDX(6) | MMC_CMD_WAIT_RESPONSE)
#define MMC_CMD7    (MMC_INDX(7) | MMC_CMD_WAIT_RESPONSE)
#define MMC_CMD8    (MMC_INDX(8) | MMC_CMD_WAIT_RESPONSE)
#define MMC_CMD9    (MMC_INDX(9) | MMC_CMD_WAIT_RESPONSE | MMC_CMD_LONG_RESPONSE)
#define MMC_CMD11   (MMC_INDX(11) | MMC_CMD_WAIT_RESPONSE)
#define MMC_CMD12   (MMC_INDX(12) | MMC_CMD_WAIT_RESPONSE)
#define MMC_CMD13   (MMC_INDX(13) | MMC_CMD_WAIT_RESPONSE)
#define MMC_CMD16   (MMC_INDX(16) | MMC_CMD_WAIT_RESPONSE)
#define MMC_CMD17   (MMC_INDX(17) | MMC_CMD_WAIT_RESPONSE)
#define MMC_CMD18   (MMC_INDX(18) | MMC_CMD_WAIT_RESPONSE)
#define MMC_CMD20   (MMC_INDX(20) | MMC_CMD_WAIT_RESPONSE)
#define MMC_CMD23   (MMC_INDX(23) | MMC_CMD_WAIT_RESPONSE)
#define MMC_CMD24   (MMC_INDX(24) | MMC_CMD_WAIT_RESPONSE)
#define MMC_CMD25   (MMC_INDX(25) | MMC_CMD_WAIT_RESPONSE)
#define MMC_CMD55   (MMC_INDX(55) | MMC_CMD_WAIT_RESPONSE)
#define MMC_ACMD41  (MMC_INDX(41) | MMC_CMD_WAIT_RESPONSE | MMC_CMD_NO_CRC_RESPONSE)
#define MMC_ACMD51  (MMC_INDX(51) | MMC_CMD_WAIT_RESPONSE)

// Valid responses for CMD1 in eMMC
#define EMMC_CMD1_CAPACITY_LESS_THAN_2GB     0x00FF8080 // Capacity <= 2GB, byte addressing used
#define EMMC_CMD1_CAPACITY_GREATER_THAN_2GB  0x40FF8080 // Capacity > 2GB, 512-byte sector addressing used

#define MMC_STATUS_APP_CMD  (1 << 5)

typedef enum _MMC_STATE {
  MmcInvalidState = 0,
  MmcHwInitializationState,
  MmcIdleState,
  MmcReadyState,
  MmcIdentificationState,
  MmcStandByState,
  MmcTransferState,
  MmcSendingDataState,
  MmcReceiveDataState,
  MmcProgrammingState,
  MmcDisconnectState,
} MMC_STATE;

#define EMMCBACKWARD     (0)
#define EMMCHS26         (1 << 0)          // High-Speed @26MHz at rated device voltages
#define EMMCHS52         (1 << 1)          // High-Speed @52MHz at rated device voltages
#define EMMCHS52DDR1V8   (1 << 2)          // High-Speed Dual Data Rate @52MHz 1.8V or 3V I/O
#define EMMCHS52DDR1V2   (1 << 3)          // High-Speed Dual Data Rate @52MHz 1.2V I/O
#define EMMCHS200SDR1V8  (1 << 4)          // HS200 Single Data Rate @200MHz 1.8V I/O
#define EMMCHS200SDR1V2  (1 << 5)          // HS200 Single Data Rate @200MHz 1.2V I/O
#define EMMCHS400DDR1V8  (1 << 6)          // HS400 Dual Data Rate @400MHz 1.8V I/O
#define EMMCHS400DDR1V2  (1 << 7)          // HS400 Dual Data Rate @400MHz 1.2V I/O

///
/// Forward declaration for EFI_MMC_HOST_PROTOCOL
///
typedef struct _EFI_MMC_HOST_PROTOCOL EFI_MMC_HOST_PROTOCOL;

typedef BOOLEAN (EFIAPI *MMC_ISCARDPRESENT)(
  IN  EFI_MMC_HOST_PROTOCOL   *This
  );

typedef BOOLEAN (EFIAPI *MMC_ISREADONLY)(
  IN  EFI_MMC_HOST_PROTOCOL   *This
  );

typedef EFI_STATUS (EFIAPI *MMC_BUILDDEVICEPATH)(
  IN  EFI_MMC_HOST_PROTOCOL     *This,
  OUT EFI_DEVICE_PATH_PROTOCOL  **DevicePath
  );

typedef EFI_STATUS (EFIAPI *MMC_NOTIFYSTATE)(
  IN  EFI_MMC_HOST_PROTOCOL     *This,
  IN  MMC_STATE                 State
  );

typedef EFI_STATUS (EFIAPI *MMC_SENDCOMMAND)(
  IN  EFI_MMC_HOST_PROTOCOL     *This,
  IN  MMC_CMD                   Cmd,
  IN  UINT32                    Argument
  );

typedef EFI_STATUS (EFIAPI *MMC_RECEIVERESPONSE)(
  IN  EFI_MMC_HOST_PROTOCOL     *This,
  IN  MMC_RESPONSE_TYPE         Type,
  IN  UINT32                    *Buffer
  );

typedef EFI_STATUS (EFIAPI *MMC_READBLOCKDATA)(
  IN  EFI_MMC_HOST_PROTOCOL     *This,
  IN  EFI_LBA                   Lba,
  IN  UINTN                     Length,
  OUT UINT32                    *Buffer
  );

typedef EFI_STATUS (EFIAPI *MMC_WRITEBLOCKDATA)(
  IN  EFI_MMC_HOST_PROTOCOL     *This,
  IN  EFI_LBA                   Lba,
  IN  UINTN                     Length,
  IN  UINT32                    *Buffer
  );

typedef EFI_STATUS (EFIAPI *MMC_SETIOS)(
  IN  EFI_MMC_HOST_PROTOCOL     *This,
  IN  UINT32                    BusClockFreq,
  IN  UINT32                    BusWidth,
  IN  UINT32                    TimingMode
  );

typedef BOOLEAN (EFIAPI *MMC_ISMULTIBLOCK)(
  IN  EFI_MMC_HOST_PROTOCOL     *This
  );

struct _EFI_MMC_HOST_PROTOCOL {
  UINT32                 Revision;
  MMC_ISCARDPRESENT      IsCardPresent;
  MMC_ISREADONLY         IsReadOnly;
  MMC_BUILDDEVICEPATH    BuildDevicePath;

  MMC_NOTIFYSTATE        NotifyState;

  MMC_SENDCOMMAND        SendCommand;
  MMC_RECEIVERESPONSE    ReceiveResponse;

  MMC_READBLOCKDATA      ReadBlockData;
  MMC_WRITEBLOCKDATA     WriteBlockData;

  MMC_SETIOS             SetIos;
  MMC_ISMULTIBLOCK       IsMultiBlock;
};

#define MMC_HOST_PROTOCOL_REVISION  0x00010002      // 1.2

#define MMC_HOST_HAS_SETIOS(Host)        (Host->Revision >= MMC_HOST_PROTOCOL_REVISION &&\
                                       Host->SetIos != NULL)
#define MMC_HOST_HAS_ISMULTIBLOCK(Host)  (Host->Revision >= MMC_HOST_PROTOCOL_REVISION &&\
                                         Host->IsMultiBlock != NULL)

extern EFI_GUID  gEmbeddedMmcHostProtocolGuid;

#endif