1 /* 2 * SiFive PWM 3 * 4 * Copyright (c) 2020 Western Digital 5 * 6 * Author: Alistair Francis <alistair.francis@wdc.com> 7 * 8 * Permission is hereby granted, free of charge, to any person obtaining a copy 9 * of this software and associated documentation files (the "Software"), to deal 10 * in the Software without restriction, including without limitation the rights 11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 12 * copies of the Software, and to permit persons to whom the Software is 13 * furnished to do so, subject to the following conditions: 14 * 15 * The above copyright notice and this permission notice shall be included in 16 * all copies or substantial portions of the Software. 17 * 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 21 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 24 * THE SOFTWARE. 25 */ 26 27 #ifndef HW_SIFIVE_PWM_H 28 #define HW_SIFIVE_PWM_H 29 30 #include "hw/sysbus.h" 31 #include "qemu/timer.h" 32 #include "qom/object.h" 33 34 #define TYPE_SIFIVE_PWM "sifive-pwm" 35 36 #define SIFIVE_PWM(obj) \ 37 OBJECT_CHECK(SiFivePwmState, (obj), TYPE_SIFIVE_PWM) 38 39 #define SIFIVE_PWM_CHANS 4 40 #define SIFIVE_PWM_IRQS SIFIVE_PWM_CHANS 41 42 typedef struct SiFivePwmState { 43 /* <private> */ 44 SysBusDevice parent_obj; 45 46 /* <public> */ 47 MemoryRegion mmio; 48 QEMUTimer timer[SIFIVE_PWM_CHANS]; 49 /* 50 * if en bit(s) set, is the number of ticks when pwmcount was 0 51 * if en bit(s) not set, is the number of ticks in pwmcount 52 */ 53 uint64_t tick_offset; 54 uint64_t freq_hz; 55 56 uint32_t pwmcfg; 57 uint32_t pwmcmp[SIFIVE_PWM_CHANS]; 58 59 qemu_irq irqs[SIFIVE_PWM_IRQS]; 60 } SiFivePwmState; 61 62 #endif /* HW_SIFIVE_PWM_H */ 63