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npcm7xx_adc.h (2117B)

      1 /*
      2  * Nuvoton NPCM7xx ADC Module
      3  *
      4  * Copyright 2020 Google LLC
      5  *
      6  * This program is free software; you can redistribute it and/or modify it
      7  * under the terms of the GNU General Public License as published by the
      8  * Free Software Foundation; either version 2 of the License, or
      9  * (at your option) any later version.
     10  *
     11  * This program is distributed in the hope that it will be useful, but WITHOUT
     12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
     13  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
     14  * for more details.
     15  */
     16 #ifndef NPCM7XX_ADC_H
     17 #define NPCM7XX_ADC_H
     18 
     19 #include "hw/clock.h"
     20 #include "hw/irq.h"
     21 #include "hw/sysbus.h"
     22 #include "qemu/timer.h"
     23 
     24 #define NPCM7XX_ADC_NUM_INPUTS      8
     25 /**
     26  * This value should not be changed unless write_adc_calibration function in
     27  * hw/arm/npcm7xx.c is also changed.
     28  */
     29 #define NPCM7XX_ADC_NUM_CALIB       2
     30 
     31 /**
     32  * struct NPCM7xxADCState - Analog to Digital Converter Module device state.
     33  * @parent: System bus device.
     34  * @iomem: Memory region through which registers are accessed.
     35  * @conv_timer: The timer counts down remaining cycles for the conversion.
     36  * @irq: GIC interrupt line to fire on expiration (if enabled).
     37  * @con: The Control Register.
     38  * @data: The Data Buffer.
     39  * @clock: The ADC Clock.
     40  * @adci: The input voltage in units of uV. 1uv = 1e-6V.
     41  * @vref: The external reference voltage.
     42  * @iref: The internal reference voltage, initialized at launch time.
     43  * @rv: The calibrated output values of 0.5V and 1.5V for the ADC.
     44  */
     45 typedef struct {
     46     SysBusDevice parent;
     47 
     48     MemoryRegion iomem;
     49 
     50     QEMUTimer    conv_timer;
     51 
     52     qemu_irq     irq;
     53     uint32_t     con;
     54     uint32_t     data;
     55     Clock       *clock;
     56 
     57     /* Voltages are in unit of uV. 1V = 1000000uV. */
     58     uint32_t     adci[NPCM7XX_ADC_NUM_INPUTS];
     59     uint32_t     vref;
     60     uint32_t     iref;
     61 
     62     uint16_t     calibration_r_values[NPCM7XX_ADC_NUM_CALIB];
     63 } NPCM7xxADCState;
     64 
     65 #define TYPE_NPCM7XX_ADC "npcm7xx-adc"
     66 #define NPCM7XX_ADC(obj) \
     67     OBJECT_CHECK(NPCM7xxADCState, (obj), TYPE_NPCM7XX_ADC)
     68 
     69 #endif /* NPCM7XX_ADC_H */