| Vishal Bhoj | 82c8071 | 2015-12-15 21:13:33 +0530 | [diff] [blame^] | 1 | /** @file
|
| 2 | I2c Bus byte read/write functions.
|
| 3 |
|
| 4 | Copyright (c) 2008 - 2009, Intel Corporation. All rights reserved.<BR>
|
| 5 | This program and the accompanying materials
|
| 6 | are licensed and made available under the terms and conditions of the BSD License
|
| 7 | which accompanies this distribution. The full text of the license may be found at
|
| 8 | http://opensource.org/licenses/bsd-license.php
|
| 9 |
|
| 10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
|
| 11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
|
| 12 |
|
| 13 | **/
|
| 14 |
|
| 15 | #ifndef _CIRRUS_LOGIC_I2C_H_
|
| 16 | #define _CIRRUS_LOGIC_I2C_H_
|
| 17 |
|
| 18 | #include <Protocol/PciIo.h>
|
| 19 |
|
| 20 | /**
|
| 21 | Read one byte data on I2C Bus.
|
| 22 |
|
| 23 | Read one byte data from the slave device connectet to I2C Bus.
|
| 24 | If Data is NULL, then ASSERT().
|
| 25 |
|
| 26 | @param PciIo The pointer to PCI_IO_PROTOCOL.
|
| 27 | @param DeviceAddress Slave device's address.
|
| 28 | @param RegisterAddress The register address on slave device.
|
| 29 | @param Data The pointer to returned data if EFI_SUCCESS returned.
|
| 30 |
|
| 31 | @retval EFI_DEVICE_ERROR
|
| 32 | @retval EFI_SUCCESS
|
| 33 |
|
| 34 | **/
|
| 35 | EFI_STATUS
|
| 36 | EFIAPI
|
| 37 | I2cReadByte (
|
| 38 | EFI_PCI_IO_PROTOCOL *PciIo,
|
| 39 | UINT8 DeviceAddress,
|
| 40 | UINT8 RegisterAddress,
|
| 41 | UINT8 *Data
|
| 42 | );
|
| 43 |
|
| 44 | /**
|
| 45 | Write one byte data onto I2C Bus.
|
| 46 |
|
| 47 | Write one byte data to the slave device connectet to I2C Bus.
|
| 48 | If Data is NULL, then ASSERT().
|
| 49 |
|
| 50 | @param PciIo The pointer to PCI_IO_PROTOCOL.
|
| 51 | @param DeviceAddress Slave device's address.
|
| 52 | @param RegisterAddress The register address on slave device.
|
| 53 | @param Data The pointer to write data.
|
| 54 |
|
| 55 | @retval EFI_DEVICE_ERROR
|
| 56 | @retval EFI_SUCCESS
|
| 57 |
|
| 58 | **/
|
| 59 | EFI_STATUS
|
| 60 | EFIAPI
|
| 61 | I2cWriteByte (
|
| 62 | EFI_PCI_IO_PROTOCOL *PciIo,
|
| 63 | UINT8 DeviceAddress,
|
| 64 | UINT8 RegisterAddress,
|
| 65 | UINT8 *Data
|
| 66 | );
|
| 67 |
|
| 68 | #endif
|