| /** @file |
| I2c Bus byte read/write functions. |
| |
| Copyright (c) 2008 - 2009, Intel Corporation |
| All rights reserved. This program and the accompanying materials |
| are licensed and made available under the terms and conditions of the BSD License |
| which accompanies this distribution. The full text of the license may be found at |
| http://opensource.org/licenses/bsd-license.php |
| |
| THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, |
| WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. |
| |
| **/
|
|
|
| #ifndef _CIRRUS_LOGIC_I2C_H_
|
| #define _CIRRUS_LOGIC_I2C_H_
|
|
|
| #include <Protocol/PciIo.h>
|
|
|
| /**
|
| Read one byte data on I2C Bus.
|
|
|
| Read one byte data from the slave device connectet to I2C Bus.
|
| If Data is NULL, then ASSERT().
|
|
|
| @param PciIo The pointer to PCI_IO_PROTOCOL.
|
| @param DeviceAddress Slave device's address.
|
| @param RegisterAddress The register address on slave device.
|
| @param Data The pointer to returned data if EFI_SUCCESS returned.
|
|
|
| @retval EFI_DEVICE_ERROR
|
| @retval EFI_SUCCESS
|
|
|
| **/
|
| EFI_STATUS
|
| EFIAPI
|
| I2cReadByte (
|
| EFI_PCI_IO_PROTOCOL *PciIo,
|
| UINT8 DeviceAddress,
|
| UINT8 RegisterAddress,
|
| UINT8 *Data
|
| );
|
|
|
| /**
|
| Write one byte data onto I2C Bus.
|
|
|
| Write one byte data to the slave device connectet to I2C Bus.
|
| If Data is NULL, then ASSERT().
|
|
|
| @param PciIo The pointer to PCI_IO_PROTOCOL.
|
| @param DeviceAddress Slave device's address.
|
| @param RegisterAddress The register address on slave device.
|
| @param Data The pointer to write data.
|
|
|
| @retval EFI_DEVICE_ERROR
|
| @retval EFI_SUCCESS
|
|
|
| **/
|
| EFI_STATUS
|
| EFIAPI
|
| I2cWriteByte (
|
| EFI_PCI_IO_PROTOCOL *PciIo,
|
| UINT8 DeviceAddress,
|
| UINT8 RegisterAddress,
|
| UINT8 *Data
|
| );
|
|
|
| #endif
|
