qemu

FORK: QEMU emulator
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sifive_pwm.h (2032B)

      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 */