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/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/include/usr/i2c/i2cif.H $ */
/* */
/* OpenPOWER HostBoot Project */
/* */
/* Contributors Listed Below - COPYRIGHT 2012,2015 */
/* [+] International Business Machines Corp. */
/* */
/* */
/* Licensed under the Apache License, Version 2.0 (the "License"); */
/* you may not use this file except in compliance with the License. */
/* You may obtain a copy of the License at */
/* */
/* http://www.apache.org/licenses/LICENSE-2.0 */
/* */
/* Unless required by applicable law or agreed to in writing, software */
/* distributed under the License is distributed on an "AS IS" BASIS, */
/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or */
/* implied. See the License for the specific language governing */
/* permissions and limitations under the License. */
/* */
/* IBM_PROLOG_END_TAG */
#ifndef __I2CIF_H
#define __I2CIF_H
namespace I2C
{
/**
* @enum i2cProcessType
*
* @brief I2C Process Type specifies which targets and which I2C master
* engines are reset or setup
*
* Specifically:
*
* _PROC_ --> loops through the processors in the system
* _MEMBUF_ --> loops through membufs in the system
*
* _HOST_ --> only does the reset if target's active engine is in Host mode
* _FSI_ --> only does the reset if target's active engine is in FSI mode
* [NOTE: active engine is determined by target's I2C_SWITCHES attribute]
*
* _ALL --> combines one or more of the PROC/MEMBUF and HOST/FSI pairs
*
*/
enum i2cProcessType
{
// used to create function-specific enums below
I2C_RANGE_HOST = 0x01,
I2C_RANGE_FSI = 0x02,
I2C_RANGE_PROC = 0x04,
I2C_RANGE_MEMBUF = 0x08,
// external interface for i2cResetActiveMasters and i2cSetupActiveMasters
I2C_PROC_HOST = I2C_RANGE_PROC | I2C_RANGE_HOST,
I2C_PROC_FSI = I2C_RANGE_PROC | I2C_RANGE_FSI,
I2C_PROC_ALL = I2C_PROC_HOST | I2C_PROC_FSI,
I2C_MEMBUF_HOST = I2C_RANGE_MEMBUF | I2C_RANGE_HOST,
I2C_MEMBUF_FSI = I2C_RANGE_MEMBUF | I2C_RANGE_FSI,
I2C_MEMBUF_ALL = I2C_MEMBUF_HOST | I2C_MEMBUF_FSI,
I2C_ALL = I2C_PROC_ALL | I2C_MEMBUF_ALL,
};
/**
* @brief This function will handle everything required to reset a target's
* "active" I2C master engine.
* [NOTE: "active" engine is determined by target's I2C_SWITCHES attribute]
*
*
* @param[in] i_resetType - Specfies which targets and which I2C master engines
* to reset
* (see i2cProcessType description above)
*
* @param[in] i_functional - Specfies if reset is performed on functional or
* any existing targets that match the i_resetType
* if true - functional targets
* if false - existing targets
*
* @return errlHndl_t - Null if successful, otherwise a pointer to
* the error log.
*/
errlHndl_t i2cResetActiveMasters ( i2cProcessType i_resetType,
bool i_functional = true );
/**
* @brief This function will handle everything required to setup a target's
* "active" I2C master engine.
* [NOTE: "active" engine is determined by target's I2C_SWITCHES attribute]
*
*
* @param[in] i_setupType - Specfies which targets and which I2C master engines
* to setup
* (see i2cProcessType description above)
*
* @param[in] i_functional - Specfies if setup is performed on functional or
* any existing targets that match the i_resetType
* if true - functional targets
* if false - existing targets
*
* @return errlHndl_t - Null if successful, otherwise a pointer to
* the error log.
*/
errlHndl_t i2cSetupActiveMasters ( i2cProcessType i_setupType,
bool i_functional = true );
/**
* @brief This function will determine if a given I2C device is present
*
* @param[in] i_target - The target device
* @param[in] i_port - The device's port
* @param[in] i_engine - The device's engine number
* @param[in] i_devAddr - The device's address
*
* @return bool - True if chip is present, False otherwise.
*/
bool i2cPresence( TARGETING::Target * i_target,
uint64_t i_port,
uint64_t i_engine,
uint64_t i_devAddr );
/**
* @enum i2cSetAccessModeType
*
* @brief I2C Set Access Mode Type specifies what targets will be set to
* a specific I2C Access Mode (Host or FSI)
*
*/
enum i2cSetAccessModeType
{
I2C_SET_ACCESS_MODE_INVALID = 0x00,
I2C_SET_ACCESS_MODE_PROC_HOST = 0x01
};
/**
* @brief This function will set the I2C_SWITCH attribute for certain
* targets to a specific mode (Host or FSI) based on the input.
*
* @param i2cSetModeType - Specifies which targets to be set and which
* mode to set them to
*/
void i2cSetAccessMode( i2cSetAccessModeType i_setModeType );
/**
* @brief Define a set of information about the I2C masters
* (primarily used to populate the devtree)
*/
struct MasterInfo_t
{
uint64_t scomAddr; //< Base scom address for control regs
uint8_t engine; //< Engine number
uint32_t freq; //< Clock frequency of master in Hz
};
/**
* @brief Return a set of information related to each I2C master on
* the given target chip
*
* @param[in] i_chip - I2C Master chip (proc or membuf)
* @param[out] o_info - list of I2C Information
*
* @return errlHndl_t - Null if successful, otherwise a pointer to
* the error log.
*/
void getMasterInfo( const TARGETING::Target* i_chip,
std::list<MasterInfo_t>& o_info );
}; // end namespace I2C
#endif // end __I2CIF_H
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