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/*
* Nuvoton NPCM7xx ADC Module
*
* Copyright 2020 Google LLC
*
* 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.
*/
#ifndef NPCM7XX_ADC_H
#define NPCM7XX_ADC_H
#include "hw/clock.h"
#include "hw/irq.h"
#include "hw/sysbus.h"
#include "qemu/timer.h"
#define NPCM7XX_ADC_NUM_INPUTS 8
/**
* This value should not be changed unless write_adc_calibration function in
* hw/arm/npcm7xx.c is also changed.
*/
#define NPCM7XX_ADC_NUM_CALIB 2
/**
* struct NPCM7xxADCState - Analog to Digital Converter Module device state.
* @parent: System bus device.
* @iomem: Memory region through which registers are accessed.
* @conv_timer: The timer counts down remaining cycles for the conversion.
* @irq: GIC interrupt line to fire on expiration (if enabled).
* @con: The Control Register.
* @data: The Data Buffer.
* @clock: The ADC Clock.
* @adci: The input voltage in units of uV. 1uv = 1e-6V.
* @vref: The external reference voltage.
* @iref: The internal reference voltage, initialized at launch time.
* @rv: The calibrated output values of 0.5V and 1.5V for the ADC.
*/
typedef struct {
SysBusDevice parent;
MemoryRegion iomem;
QEMUTimer conv_timer;
qemu_irq irq;
uint32_t con;
uint32_t data;
Clock *clock;
/* Voltages are in unit of uV. 1V = 1000000uV. */
uint32_t adci[NPCM7XX_ADC_NUM_INPUTS];
uint32_t vref;
uint32_t iref;
uint16_t calibration_r_values[NPCM7XX_ADC_NUM_CALIB];
} NPCM7xxADCState;
#define TYPE_NPCM7XX_ADC "npcm7xx-adc"
#define NPCM7XX_ADC(obj) \
OBJECT_CHECK(NPCM7xxADCState, (obj), TYPE_NPCM7XX_ADC)
#endif /* NPCM7XX_ADC_H */
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