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Diffstat (limited to 'src/vendorcode/intel/edk2/edk2-stable202005/MdePkg/Include/Ppi/I2cMaster.h')
| -rw-r--r-- | src/vendorcode/intel/edk2/edk2-stable202005/MdePkg/Include/Ppi/I2cMaster.h | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/src/vendorcode/intel/edk2/edk2-stable202005/MdePkg/Include/Ppi/I2cMaster.h b/src/vendorcode/intel/edk2/edk2-stable202005/MdePkg/Include/Ppi/I2cMaster.h new file mode 100644 index 0000000000..e6d14503ec --- /dev/null +++ b/src/vendorcode/intel/edk2/edk2-stable202005/MdePkg/Include/Ppi/I2cMaster.h @@ -0,0 +1,102 @@ +/** @file + This PPI manipulates the I2C host controller to perform transactions as a master + on the I2C bus using the current state of any switches or multiplexers in the I2C bus. + + Copyright (c) 2013 - 2018, Intel Corporation. All rights reserved.<BR> + SPDX-License-Identifier: BSD-2-Clause-Patent + + @par Revision Reference: + This PPI is introduced in PI Version 1.3. + +**/ + +#ifndef __I2C_MASTER_PPI_H__ +#define __I2C_MASTER_PPI_H__ + +#include <Pi/PiI2c.h> + +#define EFI_PEI_I2C_MASTER_PPI_GUID \ + { 0xb3bfab9b, 0x9f9c, 0x4e8b, { 0xad, 0x37, 0x7f, 0x8c, 0x51, 0xfc, 0x62, 0x80 }} + +typedef struct _EFI_PEI_I2C_MASTER_PPI EFI_PEI_I2C_MASTER_PPI; + +/** + Set the frequency for the I2C clock line. + + @param This Pointer to an EFI_PEI_I2C_MASTER_PPI structure. + @param BusClockHertz Pointer to the requested I2C bus clock frequency in Hertz. + Upon return this value contains the actual frequency + in use by the I2C controller. + + @retval EFI_SUCCESS The bus frequency was set successfully. + @retval EFI_INVALID_PARAMETER BusClockHertz is NULL + @retval EFI_UNSUPPORTED The controller does not support this frequency. + +**/ +typedef +EFI_STATUS +(EFIAPI *EFI_PEI_I2C_MASTER_PPI_SET_BUS_FREQUENCY) ( + IN EFI_PEI_I2C_MASTER_PPI *This, + IN UINTN *BusClockHertz + ); + +/** + Reset the I2C controller and configure it for use. + + @param This Pointer to an EFI_PEI_I2C_MASTER_PPI structure. + + @retval EFI_SUCCESS The reset completed successfully. + @retval EFI_DEVICE_ERROR The reset operation failed. + +**/ +typedef +EFI_STATUS +(EFIAPI *EFI_PEI_I2C_MASTER_PPI_RESET) ( + IN CONST EFI_PEI_I2C_MASTER_PPI *This + ); + +/** + Start an I2C transaction on the host controller. + + @param This Pointer to an EFI_PEI_I2C_MASTER_PPI structure. + @param SlaveAddress Address of the device on the I2C bus. + Set the I2C_ADDRESSING_10_BIT when using 10-bit addresses, + clear this bit for 7-bit addressing. + Bits 0-6 are used for 7-bit I2C slave addresses and + bits 0-9 are used for 10-bit I2C slave addresses. + @param RequestPacket Pointer to an EFI_I2C_REQUEST_PACKET structure describing the I2C transaction. + + @retval EFI_SUCCESS The transaction completed successfully. + @retval EFI_BAD_BUFFER_SIZE The RequestPacket->LengthInBytes value is too large. + @retval EFI_DEVICE_ERROR There was an I2C error (NACK) during the transaction. + @retval EFI_INVALID_PARAMETER RequestPacket is NULL + @retval EFI_NO_RESPONSE The I2C device is not responding to the slave address. + EFI_DEVICE_ERROR will be returned if the controller cannot distinguish when the NACK occurred. + @retval EFI_NOT_FOUND Reserved bit set in the SlaveAddress parameter + @retval EFI_OUT_OF_RESOURCES Insufficient memory for I2C transaction + @retval EFI_UNSUPPORTED The controller does not support the requested transaction. + +**/ +typedef +EFI_STATUS +(EFIAPI *EFI_PEI_I2C_MASTER_PPI_START_REQUEST) ( + IN CONST EFI_PEI_I2C_MASTER_PPI *This, + IN UINTN SlaveAddress, + IN EFI_I2C_REQUEST_PACKET *RequestPacket + ); + +/// +/// This PPI manipulates the I2C host controller to perform transactions as a master on the I2C bus +/// using the current state of any switches or multiplexers in the I2C bus. +/// +struct _EFI_PEI_I2C_MASTER_PPI { + EFI_PEI_I2C_MASTER_PPI_SET_BUS_FREQUENCY SetBusFrequency; + EFI_PEI_I2C_MASTER_PPI_RESET Reset; + EFI_PEI_I2C_MASTER_PPI_START_REQUEST StartRequest; + CONST EFI_I2C_CONTROLLER_CAPABILITIES *I2cControllerCapabilities; + EFI_GUID Identifier; +}; + +extern EFI_GUID gEfiPeiI2cMasterPpiGuid; + +#endif |