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/*
* Copyright (c) 2009 NVIDIA Corporation.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#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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