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 */ 70