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Diffstat (limited to 'src/vendorcode/intel/edk2/UDK2017/MdePkg/Include/Protocol/I2cEnumerate.h')
| -rw-r--r-- | src/vendorcode/intel/edk2/UDK2017/MdePkg/Include/Protocol/I2cEnumerate.h | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/src/vendorcode/intel/edk2/UDK2017/MdePkg/Include/Protocol/I2cEnumerate.h b/src/vendorcode/intel/edk2/UDK2017/MdePkg/Include/Protocol/I2cEnumerate.h new file mode 100644 index 0000000000..00f80d0b68 --- /dev/null +++ b/src/vendorcode/intel/edk2/UDK2017/MdePkg/Include/Protocol/I2cEnumerate.h @@ -0,0 +1,110 @@ +/** @file + I2C Device Enumerate Protocol as defined in the PI 1.3 specification. + + This protocol supports the enumerations of device on the I2C bus. + + Copyright (c) 2013, 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. + + @par Revision Reference: + This protocol is from PI Version 1.3. + +**/ + +#ifndef __I2C_ENUMERATE_H__ +#define __I2C_ENUMERATE_H__ + +#include <Pi/PiI2c.h> + +#define EFI_I2C_ENUMERATE_PROTOCOL_GUID { 0xda8cd7c4, 0x1c00, 0x49e2, { 0x80, 0x3e, 0x52, 0x14, 0xe7, 0x01, 0x89, 0x4c }} + +typedef struct _EFI_I2C_ENUMERATE_PROTOCOL EFI_I2C_ENUMERATE_PROTOCOL; + +/** + Enumerate the I2C devices + + This function enables the caller to traverse the set of I2C devices + on an I2C bus. + + @param[in] This The platform data for the next device on + the I2C bus was returned successfully. + @param[in, out] Device Pointer to a buffer containing an + EFI_I2C_DEVICE structure. Enumeration is + started by setting the initial EFI_I2C_DEVICE + structure pointer to NULL. The buffer + receives an EFI_I2C_DEVICE structure pointer + to the next I2C device. + + @retval EFI_SUCCESS The platform data for the next device on + the I2C bus was returned successfully. + @retval EFI_INVALID_PARAMETER Device is NULL + @retval EFI_NO_MAPPING *Device does not point to a valid + EFI_I2C_DEVICE structure returned in a + previous call Enumerate(). + +**/ +typedef +EFI_STATUS +(EFIAPI *EFI_I2C_ENUMERATE_PROTOCOL_ENUMERATE) ( + IN CONST EFI_I2C_ENUMERATE_PROTOCOL *This, + IN OUT CONST EFI_I2C_DEVICE **Device + ); + +/** + Get the requested I2C bus frequency for a specified bus configuration. + + This function returns the requested I2C bus clock frequency for the + I2cBusConfiguration. This routine is provided for diagnostic purposes + and is meant to be called after calling Enumerate to get the + I2cBusConfiguration value. + + @param[in] This Pointer to an EFI_I2C_ENUMERATE_PROTOCOL + structure. + @param[in] I2cBusConfiguration I2C bus configuration to access the I2C + device + @param[out] *BusClockHertz Pointer to a buffer to receive the I2C + bus clock frequency in Hertz + + @retval EFI_SUCCESS The I2C bus frequency was returned + successfully. + @retval EFI_INVALID_PARAMETER BusClockHertz was NULL + @retval EFI_NO_MAPPING Invalid I2cBusConfiguration value + +**/ +typedef +EFI_STATUS +(EFIAPI *EFI_I2C_ENUMERATE_PROTOCOL_GET_BUS_FREQUENCY) ( + IN CONST EFI_I2C_ENUMERATE_PROTOCOL *This, + IN UINTN I2cBusConfiguration, + OUT UINTN *BusClockHertz + ); + +/// +/// I2C Enumerate protocol +/// +struct _EFI_I2C_ENUMERATE_PROTOCOL { + /// + /// Traverse the set of I2C devices on an I2C bus. This routine + /// returns the next I2C device on an I2C bus. + /// + EFI_I2C_ENUMERATE_PROTOCOL_ENUMERATE Enumerate; + + /// + /// Get the requested I2C bus frequency for a specified bus + /// configuration. + /// + EFI_I2C_ENUMERATE_PROTOCOL_GET_BUS_FREQUENCY GetBusFrequency; +}; + +/// +/// Reference to variable defined in the .DEC file +/// +extern EFI_GUID gEfiI2cEnumerateProtocolGuid; + +#endif // __I2C_ENUMERATE_H__ |