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/*
* Copyright (c) 2009 NVIDIA Corporation.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of the NVIDIA Corporation nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
*/
#ifndef INCLUDED_AD5258_DPM_I2C_H
#define INCLUDED_AD5258_DPM_I2C_H
#include "nvodm_pmu.h"
#include "max8907b.h"
#if defined(__cplusplus)
extern "C"
{
#endif
#define AD5258_SLAVE_ADDR (0x9C) // (7'h4E)
#define AD5258_I2C_SPEED_KHZ (400)
#define AD5258_I2C_RETRY_CNT (2)
#define AD5258_I2C_TIMEOUT_MS (1000)
#define AD5258_RDAC_ADDR (0x0)
#define AD5258_RDAC_MASK (0x3F)
/*
* Linear approximation of digital potentiometer (DPM) scaling ladder:
* D(Vout) = (Vout - V0) * M1 / 2^b
* Vout(D) = V0 + (D * M2) / 2^b
* D - DPM setting, Vout - output voltage in mV, b - fixed point calculation
* precision, approximation parameters V0, M1, M2 are determined for the
* particular schematic combining constant resistors, DPM, and DCDC supply.
*/
// On Whistler:
#define AD5258_V0 (815)
#define AD5258_M1 (229)
#define AD5258_M2 (4571)
#define AD5258_b (10)
#define AD5258_VMAX (AD5258_V0 + ((AD5258_RDAC_MASK * AD5258_M2 + \
(0x1 << (AD5258_b - 1))) >> AD5258_b))
// Minimum voltage step is determined by DPM resolution, maximum voltage step
// is limited to keep dynamic over/under shoot within +/- 50mV
#define AD5258_MIN_STEP_MV ((AD5258_M2 + (0x1 << AD5258_b) - 1) >> AD5258_b)
#define AD5258_MAX_STEP_MV (50)
#define AD5258_MAX_STEP_SETTLE_TIME_US (20)
#define AD5258_TURN_ON_TIME_US (2000)
NvBool
Ad5258I2cSetVoltage(
NvOdmPmuDeviceHandle hDevice,
NvU32 MilliVolts);
NvBool
Ad5258I2cGetVoltage(
NvOdmPmuDeviceHandle hDevice,
NvU32* pMilliVolts);
#if defined(__cplusplus)
}
#endif
/** @} */
#endif // INCLUDED_AD5258_DPM_I2C_H
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