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__