PiI2c.h

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#ifndef __PI_I2C_H__
#define __PI_I2C_H__
 
//  and 127 in 10-bit mode.
#define I2C_ADDRESSING_10_BIT  0x80000000
 
typedef struct {
  UINT32    StructureSizeInBytes;
 
  UINT32    MaximumReceiveBytes;
 
  UINT32    MaximumTransmitBytes;
 
  UINT32    MaximumTotalBytes;
} EFI_I2C_CONTROLLER_CAPABILITIES;
 
typedef struct {
  CONST EFI_GUID    *DeviceGuid;
 
  UINT32            DeviceIndex;
 
  UINT32          HardwareRevision;
 
  UINT32          I2cBusConfiguration;
 
  UINT32          SlaveAddressCount;
 
  CONST UINT32    *SlaveAddressArray;
} EFI_I2C_DEVICE;
 
#define I2C_FLAG_READ  0x00000001
 
 
#define I2C_FLAG_SMBUS_OPERATION  0x00010000
 
#define I2C_FLAG_SMBUS_BLOCK  0x00020000
 
#define I2C_FLAG_SMBUS_PROCESS_CALL  0x00040000
 
#define I2C_FLAG_SMBUS_PEC  0x00080000
 
// ----------------------------------------------------------------------
// ----------------------------------------------------------------------
 
typedef struct {
  UINT32    Flags;
 
  UINT32    LengthInBytes;
 
  UINT8     *Buffer;
} EFI_I2C_OPERATION;
 
typedef struct {
  UINTN                OperationCount;
 
  EFI_I2C_OPERATION    Operation[1];
} EFI_I2C_REQUEST_PACKET;
 
#endif //  __PI_I2C_H__