| 9f354310 |
1 | /** @file |
| 2 | I2c Bus byte read/write functions. |
| 3 | |
| 4 | Copyright (c) 2008 - 2009, Intel Corporation |
| 5 | All rights reserved. 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 | **/\r |
| 14 | \r |
| 15 | #ifndef _CIRRUS_LOGIC_I2C_H_\r |
| 16 | #define _CIRRUS_LOGIC_I2C_H_\r |
| 17 | \r |
| 18 | #include <Protocol/PciIo.h>\r |
| 19 | \r |
| 20 | /**\r |
| 21 | Read one byte data on I2C Bus.\r |
| 22 | \r |
| 23 | Read one byte data from the slave device connectet to I2C Bus.\r |
| 24 | If Data is NULL, then ASSERT().\r |
| 25 | \r |
| 26 | @param PciIo The pointer to PCI_IO_PROTOCOL.\r |
| 27 | @param DeviceAddress Slave device's address.\r |
| 28 | @param RegisterAddress The register address on slave device.\r |
| 29 | @param Data The pointer to returned data if EFI_SUCCESS returned.\r |
| 30 | \r |
| 31 | @retval EFI_DEVICE_ERROR\r |
| 32 | @retval EFI_SUCCESS\r |
| 33 | \r |
| 34 | **/\r |
| 35 | EFI_STATUS\r |
| 36 | EFIAPI\r |
| 37 | I2cReadByte (\r |
| 38 | EFI_PCI_IO_PROTOCOL *PciIo,\r |
| 39 | UINT8 DeviceAddress,\r |
| 40 | UINT8 RegisterAddress,\r |
| 41 | UINT8 *Data\r |
| 42 | );\r |
| 43 | \r |
| 44 | /**\r |
| 45 | Write one byte data onto I2C Bus.\r |
| 46 | \r |
| 47 | Write one byte data to the slave device connectet to I2C Bus.\r |
| 48 | If Data is NULL, then ASSERT().\r |
| 49 | \r |
| 50 | @param PciIo The pointer to PCI_IO_PROTOCOL.\r |
| 51 | @param DeviceAddress Slave device's address.\r |
| 52 | @param RegisterAddress The register address on slave device.\r |
| 53 | @param Data The pointer to write data.\r |
| 54 | \r |
| 55 | @retval EFI_DEVICE_ERROR\r |
| 56 | @retval EFI_SUCCESS\r |
| 57 | \r |
| 58 | **/\r |
| 59 | EFI_STATUS\r |
| 60 | EFIAPI\r |
| 61 | I2cWriteByte (\r |
| 62 | EFI_PCI_IO_PROTOCOL *PciIo,\r |
| 63 | UINT8 DeviceAddress,\r |
| 64 | UINT8 RegisterAddress,\r |
| 65 | UINT8 *Data\r |
| 66 | );\r |
| 67 | \r |
| 68 | #endif\r |
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