/** @file
  The UEFI Smart Card Reader Protocol provides an abstraction for device to provide
  smart card reader support. This protocol is very close to Part 5 of PC/SC workgroup
  specifications and provides an API to applications willing to communicate with a
  smart card or a smart card reader.

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

**/

#ifndef __SMART_CARD_READER_H__
#define __SMART_CARD_READER_H__

#define EFI_SMART_CARD_READER_PROTOCOL_GUID \
    { \
      0x2a4d1adf, 0x21dc, 0x4b81, {0xa4, 0x2f, 0x8b, 0x8e, 0xe2, 0x38, 0x00, 0x60} \
    }

typedef struct _EFI_SMART_CARD_READER_PROTOCOL EFI_SMART_CARD_READER_PROTOCOL;

//
// Codes for access mode
//
#define SCARD_AM_READER  0x0001             // Exclusive access to reader
#define SCARD_AM_CARD    0x0002             // Exclusive access to card
//
// Codes for card action
//
#define SCARD_CA_NORESET    0x0000          // Don't reset card
#define SCARD_CA_COLDRESET  0x0001          // Perform a cold reset
#define SCARD_CA_WARMRESET  0x0002          // Perform a warm reset
#define SCARD_CA_UNPOWER    0x0003          // Power off the card
#define SCARD_CA_EJECT      0x0004          // Eject the card
//
// Protocol types
//
#define SCARD_PROTOCOL_UNDEFINED  0x0000
#define SCARD_PROTOCOL_T0         0x0001
#define SCARD_PROTOCOL_T1         0x0002
#define SCARD_PROTOCOL_RAW        0x0004
//
// Codes for state type
//
#define SCARD_UNKNOWN   0x0000              /* state is unknown */
#define SCARD_ABSENT    0x0001              /* Card is absent */
#define SCARD_INACTIVE  0x0002              /* Card is present and not powered*/
#define SCARD_ACTIVE    0x0003              /* Card is present and powered */
//
// Macro to generate a ControlCode & PC/SC part 10 control code
//
#define SCARD_CTL_CODE(code)  (0x42000000 + (code))
#define CM_IOCTL_GET_FEATURE_REQUEST  SCARD_CTL_CODE(3400)

/**
  This function requests connection to the smart card or the reader, using the
  appropriate reset type and protocol.

  The SCardConnectfunction requests access to the smart card or the reader. Upon
  success, it is then possible to call SCardTransmit.

  If AccessMode is set to SCARD_AM_READER, PreferredProtocols must be set to
  SCARD_PROTOCOL_UNDEFINED and CardAction to SCARD_CA_NORESET else function
  fails with EFI_INVALID_PARAMETER.

  @param[in]  This               Indicates a pointer to the calling context.
  @param[in]  AccessMode         Codes of access mode.
  @param[in]  CardAction         SCARD_CA_NORESET, SCARD_CA_COLDRESET or
                                 SCARD_CA_WARMRESET.
  @param[in]  PreferredProtocols Bitmask of acceptable protocols.
  @param[out] ActiveProtocol     A flag that indicates the active protocol.

  @retval EFI_SUCCESS            The requested command completed successfully.
  @retval EFI_INVALID_PARAMETER  This is NULL
  @retval EFI_INVALID_PARAMETER  AccessMode is not valid.
  @retval EFI_INVALID_PARAMETER  CardAction is not valid.
  @retval EFI_INVALID_PARAMETER  Invalid combination of AccessMode/CardAction/
                                 PreferredProtocols.
  @retval EFI_NOT_READY          A smart card is inserted but failed to return an ATR.
  @retval EFI_UNSUPPORTED        PreferredProtocols does not contain an available
                                 protocol to use.
  @retval EFI_NO_MEDIA           AccessMode is set to SCARD_AM_CARD but there is
                                 no smart card inserted.
  @retval EFI_ACCESS_DENIED      Access is already locked by a previous SCardConnectcall.
  @retval EFI_DEVICE_ERROR       Any other error condition, typically a reader removal.

**/
typedef
EFI_STATUS
(EFIAPI *EFI_SMART_CARD_READER_CONNECT)(
  IN     EFI_SMART_CARD_READER_PROTOCOL    *This,
  IN     UINT32                            AccessMode,
  IN     UINT32                            CardAction,
  IN     UINT32                            PreferredProtocols,
  OUT UINT32                            *ActiveProtocol
  );

/**
  This function releases a connection previously taken by SCardConnect.

  The SCardDisconnect function releases the lock previously taken by SCardConnect.
  In case the smart card has been removed before this call, thisfunction
  returns EFI_SUCCESS. If there is no previous call to SCardConnect, this
  function returns EFI_SUCCESS.

  @param[in]  This               Indicates a pointer to the calling context.
  @param[in]  CardAction         Codes for card action.

  @retval EFI_SUCCESS            The requested command completed successfully.
  @retval EFI_INVALID_PARAMETER  This is NULL
  @retval EFI_INVALID_PARAMETER  CardAction value is unknown.
  @retval EFI_UNSUPPORTED        Reader does not support Eject card feature
                                 (disconnect was not performed).
  @retval EFI_DEVICE_ERROR       Any other error condition, typically a reader removal.

**/
typedef
EFI_STATUS
(EFIAPI *EFI_SMART_CARD_READER_DISCONNECT)(
  IN  EFI_SMART_CARD_READER_PROTOCOL    *This,
  IN  UINT32                            CardAction
  );

/**
  This function retrieves some basic information about the smart card and reader.

  The SCardStatusfunction retrieves basic reader and card information.

  If ReaderName, State, CardProtocolor Atris NULL, the function does not fail but
  does not fill in such variables.

  If EFI_SUCCESS is not returned, ReaderName and Atr contents shall not be considered
  as valid.

  @param[in]      This             Indicates a pointer to the calling context.
  @param[out]     ReaderName       A pointer to a NULL terminated string that will
                                   contain the reader name.
  @param[in, out] ReaderNameLength On input, a pointer to the variablethat holds the
                                   maximal size, in bytes,of ReaderName.
                                   On output, the required size, in bytes, for ReaderName.
  @param[out]     State            Current state of the smart card reader.
  @param[out]     CardProtocol     Current protocol used to communicate with the smart card.
  @param[out]     Atr              A pointer to retrieve the ATR of the smart card.
  @param[in, out] AtrLength        On input, a pointer to hold the maximum size, in bytes,
                                   of Atr(usually 33).
                                   On output, the required size, inbytes, for the smart
                                   card ATR.

  @retval EFI_SUCCESS            The requested command completed successfully.
  @retval EFI_INVALID_PARAMETER  This is NULL
  @retval EFI_INVALID_PARAMETER  ReaderName is not NULL but ReaderNameLength is NULL
  @retval EFI_INVALID_PARAMETER  Atr is not NULL but AtrLength is NULL
  @retval EFI_BUFFER_TOO_SMALL   ReaderNameLength is not big enough to hold the reader name.
                                 ReaderNameLength has been updated to the required value.
  @retval EFI_BUFFER_TOO_SMALL   AtrLength is not big enough to hold the ATR.
                                 AtrLength has been updated to the required value.
  @retval EFI_DEVICE_ERROR       Any other error condition, typically a reader removal.

**/
typedef
EFI_STATUS
(EFIAPI *EFI_SMART_CARD_READER_STATUS)(
  IN     EFI_SMART_CARD_READER_PROTOCOL    *This,
  OUT CHAR16                            *ReaderName OPTIONAL,
  IN OUT UINTN                             *ReaderNameLength OPTIONAL,
  OUT UINT32                            *State OPTIONAL,
  OUT UINT32                            *CardProtocol OPTIONAL,
  OUT UINT8                             *Atr OPTIONAL,
  IN OUT UINTN                             *AtrLength OPTIONAL
  );

/**
  This function sends a command to the card or reader and returns its response.

  The protocol to use to communicate with the smart card has been selected through
  SCardConnectcall.

  In case RAPDULength indicates a buffer too small to holdthe response APDU, the
  function fails with EFI_BUFFER_TOO_SMALL.

  @param[in]      This          A pointer to the EFI_USBFN_IO_PROTOCOLinstance.
  @param[in]      CAPDU         A pointer to a byte array thatcontains the Command
                                APDU to send to the smart card or reader.
  @param[in]      CAPDULength   Command APDU size, in bytes.
  @param[out]     RAPDU         A pointer to a byte array that will contain the
                                Response APDU.
  @param[in, out] RAPDULength   On input, the maximum size, inbytes, of the Response
                                APDU.
                                On output, the size, in bytes, of the Response APDU.

  @retval EFI_SUCCESS           The requested command completed successfully.
  @retval EFI_INVALID_PARAMETER This is NULL.
  @retval EFI_INVALID_PARAMETER CAPDU is NULL or CAPDULength is 0.
  @retval EFI_BUFFER_TOO_SMALL  RAPDULength is not big enough to hold the response APDU.
                                RAPDULength has been updated to the required value.
  @retval EFI_NO_MEDIA          There is no card in the reader.
  @retval EFI_NOT_READY         Card is not powered.
  @retval EFI_PROTOCOL_ERROR    A protocol error has occurred.
  @retval EFI_TIMEOUT           The reader did not respond.
  @retval EFI_ACCESS_DENIED     A communication with the reader/card is already pending.
  @retval EFI_DEVICE_ERROR      Any other error condition, typically a reader removal.

**/
typedef
EFI_STATUS
(EFIAPI *EFI_SMART_CARD_READER_TRANSMIT)(
  IN     EFI_SMART_CARD_READER_PROTOCOL    *This,
  IN     UINT8                             *CAPDU,
  IN     UINTN                             CAPDULength,
  OUT UINT8                             *RAPDU,
  IN OUT UINTN                             *RAPDULength
  );

/**
  This function provides direct access to the reader.

  This function gives direct control to send commands to the driver or the reader.
  The ControlCode to use is vendor dependant; the only standard code defined is
  the one to get PC/SC part 10 features.

  InBuffer and Outbuffer may be NULL when ControlCode operation does not require
  them.

  @param[in]      This             Indicates a pointer to the calling context.
  @param[in]      ControlCode      The control code for the operation to perform.
  @param[in]      InBuffer         A pointer to the input parameters.
  @param[in]      InBufferLength   Size, in bytes, of input parameters.
  @param[out]     OutBuffer        A pointer to the output parameters.
  @param[in, out] OutBufferLength  On input, maximal size, in bytes, to store output
                                   parameters.
                                   On output, the size, in bytes, of output parameters.

  @retval EFI_SUCCESS           The requested command completed successfully.
  @retval EFI_INVALID_PARAMETER This is NULL.
  @retval EFI_INVALID_PARAMETER ControlCode requires input parameters but:
                                  InBuffer is NULL or InBufferLenth is NULL or
                                  InBuffer is not NULL but InBufferLenth is less than
                                  expected.
  @retval EFI_INVALID_PARAMETER OutBuffer is not NULL but OutBufferLength is NULL.
  @retval EFI_UNSUPPORTED       ControlCode is not supported.
  @retval EFI_BUFFER_TOO_SMALL  OutBufferLength is not big enough to hold the output
                                parameters.
                                OutBufferLength has been updated to the required value.
  @retval EFI_NO_MEDIA          There is no card in the reader and the control code
                                specified requires one.
  @retval EFI_NOT_READY         ControlCode requires a powered card to operate.
  @retval EFI_PROTOCOL_ERROR    A protocol error has occurred.
  @retval EFI_TIMEOUT           The reader did not respond.
  @retval EFI_ACCESS_DENIED     A communication with the reader/card is already pending.
  @retval EFI_DEVICE_ERROR      Any other error condition, typically a reader removal.

**/
typedef
EFI_STATUS
(EFIAPI *EFI_SMART_CARD_READER_CONTROL)(
  IN     EFI_SMART_CARD_READER_PROTOCOL    *This,
  IN     UINT32                            ControlCode,
  IN     UINT8                             *InBuffer OPTIONAL,
  IN     UINTN                             InBufferLength OPTIONAL,
  OUT UINT8                             *OutBuffer OPTIONAL,
  IN OUT UINTN                             *OutBufferLength OPTIONAL
  );

/**
  This function retrieves a reader or smart card attribute.

  Possibly supported attrib values are listed in "PC/SC specification, Part 3:
  Requirements for PC-Connected Interface Devices".

  @param[in]      This             Indicates a pointer to the calling context.
  @param[in]      Attrib           Identifier for the attribute to retrieve.
  @param[out]     OutBuffer        A pointer to a buffer that will contain
                                   attribute data.
  @param[in, out] OutBufferLength  On input, maximal size, in bytes, to store
                                   attribute data.
                                   On output, the size, in bytes, of attribute
                                   data.

  @retval EFI_SUCCESS           The requested command completed successfully.
  @retval EFI_INVALID_PARAMETER This is NULL.
  @retval EFI_INVALID_PARAMETER OutBuffer is NULL or OutBufferLength is 0.
  @retval EFI_BUFFER_TOO_SMALL  OutBufferLength is not big enough to hold the output
                                parameters.
                                OutBufferLength has been updated to the required value.
  @retval EFI_UNSUPPORTED       Attribis not supported
  @retval EFI_NO_MEDIA          There is no card in the reader and Attrib value
                                requires one.
  @retval EFI_NOT_READY         Attrib requires a powered card to operate.
  @retval EFI_PROTOCOL_ERROR    A protocol error has occurred.
  @retval EFI_TIMEOUT           The reader did not respond.
  @retval EFI_DEVICE_ERROR      Any other error condition, typically a reader removal.

**/
typedef
EFI_STATUS
(EFIAPI *EFI_SMART_CARD_READER_GET_ATTRIB)(
  IN     EFI_SMART_CARD_READER_PROTOCOL    *This,
  IN     UINT32                            Attrib,
  OUT UINT8                             *OutBuffer,
  IN OUT UINTN                             *OutBufferLength
  );

///
/// Smart card aware application invokes this protocol to get access to an inserted
/// smart card in the reader or to the reader itself.
///
struct _EFI_SMART_CARD_READER_PROTOCOL {
  EFI_SMART_CARD_READER_CONNECT       SCardConnect;
  EFI_SMART_CARD_READER_DISCONNECT    SCardDisconnect;
  EFI_SMART_CARD_READER_STATUS        SCardStatus;
  EFI_SMART_CARD_READER_TRANSMIT      SCardTransmit;
  EFI_SMART_CARD_READER_CONTROL       SCardControl;
  EFI_SMART_CARD_READER_GET_ATTRIB    SCardGetAttrib;
};

extern EFI_GUID  gEfiSmartCardReaderProtocolGuid;

#endif