| 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/core/clock.h" |
| 20 | #include "hw/core/irq.h" |
| 21 | #include "hw/core/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 | struct NPCM7xxADCState { |
| 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 | }; |
| 64 | |
| 65 | #define TYPE_NPCM7XX_ADC "npcm7xx-adc" |
| 66 | OBJECT_DECLARE_SIMPLE_TYPE(NPCM7xxADCState, NPCM7XX_ADC) |
| 67 | |
| 68 | #endif /* NPCM7XX_ADC_H */ |