| 1 | /* |
| 2 | * Nuvoton NPCM7xx MFT Module |
| 3 | * |
| 4 | * Copyright 2021 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_MFT_H |
| 17 | #define NPCM7XX_MFT_H |
| 18 | |
| 19 | #include "system/memory.h" |
| 20 | #include "hw/core/clock.h" |
| 21 | #include "hw/core/irq.h" |
| 22 | #include "hw/core/sysbus.h" |
| 23 | #include "qom/object.h" |
| 24 | |
| 25 | /* Max Fan input number. */ |
| 26 | #define NPCM7XX_MFT_MAX_FAN_INPUT 19 |
| 27 | |
| 28 | /* |
| 29 | * Number of registers in one MFT module. Don't change this without increasing |
| 30 | * the version_id in vmstate. |
| 31 | */ |
| 32 | #define NPCM7XX_MFT_NR_REGS (0x20 / sizeof(uint16_t)) |
| 33 | |
| 34 | /* |
| 35 | * The MFT can take up to 4 inputs: A0, B0, A1, B1. It can measure one A and one |
| 36 | * B simultaneously. NPCM7XX_MFT_INASEL and NPCM7XX_MFT_INBSEL are used to |
| 37 | * select which A or B input are used. |
| 38 | */ |
| 39 | #define NPCM7XX_MFT_FANIN_COUNT 4 |
| 40 | |
| 41 | /** |
| 42 | * struct NPCM7xxMFTState - Multi Functional Tachometer device state. |
| 43 | * @parent: System bus device. |
| 44 | * @iomem: Memory region through which registers are accessed. |
| 45 | * @clock_in: The input clock for MFT from CLK module. |
| 46 | * @clock_{1,2}: The counter clocks for NPCM7XX_MFT_CNT{1,2} |
| 47 | * @irq: The IRQ for this MFT state. |
| 48 | * @regs: The MMIO registers. |
| 49 | * @max_rpm: The maximum rpm for fans. Order: A0, B0, A1, B1. |
| 50 | * @duty: The duty cycles for fans, relative to NPCM7XX_PWM_MAX_DUTY. |
| 51 | */ |
| 52 | struct NPCM7xxMFTState { |
| 53 | SysBusDevice parent; |
| 54 | |
| 55 | MemoryRegion iomem; |
| 56 | |
| 57 | Clock *clock_in; |
| 58 | Clock *clock_1, *clock_2; |
| 59 | qemu_irq irq; |
| 60 | uint16_t regs[NPCM7XX_MFT_NR_REGS]; |
| 61 | |
| 62 | uint32_t max_rpm[NPCM7XX_MFT_FANIN_COUNT]; |
| 63 | uint32_t duty[NPCM7XX_MFT_FANIN_COUNT]; |
| 64 | }; |
| 65 | |
| 66 | #define TYPE_NPCM7XX_MFT "npcm7xx-mft" |
| 67 | OBJECT_DECLARE_SIMPLE_TYPE(NPCM7xxMFTState, NPCM7XX_MFT) |
| 68 | |
| 69 | #endif /* NPCM7XX_MFT_H */ |