| /** @file | |
| I2c Bus byte read/write functions. | |
| Copyright (c) 2008 - 2009, Intel Corporation. All rights reserved.<BR> | |
| 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 |