include/hw/timer/nrf51_timer.h

   1 /*
   2  * nRF51 System-on-Chip Timer peripheral
   3  *
   4  * QEMU interface:
   5  * + sysbus MMIO regions 0: GPIO registers
   6  * + sysbus irq
   7  *
   8  * Copyright 2018 Steffen Görtz <contrib@steffen-goertz.de>
   9  *
  10  * This code is licensed under the GPL version 2 or later.  See
  11  * the COPYING file in the top-level directory.
  12  */
  13 #ifndef NRF51_TIMER_H
  14 #define NRF51_TIMER_H
  15
  16 #include "hw/sysbus.h"
  17 #include "qemu/timer.h"
  18 #include "qom/object.h"
  19 #define TYPE_NRF51_TIMER "nrf51_soc.timer"
  20 OBJECT_DECLARE_SIMPLE_TYPE(NRF51TimerState, NRF51_TIMER)
  21
  22 #define NRF51_TIMER_REG_COUNT 4
  23
  24 #define NRF51_TIMER_TASK_START 0x000
  25 #define NRF51_TIMER_TASK_STOP 0x004
  26 #define NRF51_TIMER_TASK_COUNT 0x008
  27 #define NRF51_TIMER_TASK_CLEAR 0x00C
  28 #define NRF51_TIMER_TASK_SHUTDOWN 0x010
  29 #define NRF51_TIMER_TASK_CAPTURE_0 0x040
  30 #define NRF51_TIMER_TASK_CAPTURE_3 0x04C
  31
  32 #define NRF51_TIMER_EVENT_COMPARE_0 0x140
  33 #define NRF51_TIMER_EVENT_COMPARE_1 0x144
  34 #define NRF51_TIMER_EVENT_COMPARE_2 0x148
  35 #define NRF51_TIMER_EVENT_COMPARE_3 0x14C
  36
  37 #define NRF51_TIMER_REG_SHORTS 0x200
  38 #define NRF51_TIMER_REG_SHORTS_MASK 0xf0f
  39 #define NRF51_TIMER_REG_INTENSET 0x304
  40 #define NRF51_TIMER_REG_INTENCLR 0x308
  41 #define NRF51_TIMER_REG_INTEN_MASK 0xf0000
  42 #define NRF51_TIMER_REG_MODE 0x504
  43 #define NRF51_TIMER_REG_MODE_MASK 0x01
  44 #define NRF51_TIMER_TIMER 0
  45 #define NRF51_TIMER_COUNTER 1
  46 #define NRF51_TIMER_REG_BITMODE 0x508
  47 #define NRF51_TIMER_REG_BITMODE_MASK 0x03
  48 #define NRF51_TIMER_WIDTH_16 0
  49 #define NRF51_TIMER_WIDTH_8 1
  50 #define NRF51_TIMER_WIDTH_24 2
  51 #define NRF51_TIMER_WIDTH_32 3
  52 #define NRF51_TIMER_REG_PRESCALER 0x510
  53 #define NRF51_TIMER_REG_PRESCALER_MASK 0x0F
  54 #define NRF51_TIMER_REG_CC0 0x540
  55 #define NRF51_TIMER_REG_CC3 0x54C
  56
  57 struct NRF51TimerState {
  58     SysBusDevice parent_obj;
  59
  60     MemoryRegion iomem;
  61     qemu_irq irq;
  62
  63     uint8_t id;
  64     QEMUTimer timer;
  65     int64_t timer_start_ns;
  66     int64_t update_counter_ns;
  67     uint32_t counter;
  68
  69     bool running;
  70
  71     uint8_t events_compare[NRF51_TIMER_REG_COUNT];
  72     uint32_t cc[NRF51_TIMER_REG_COUNT];
  73     uint32_t shorts;
  74     uint32_t inten;
  75     uint32_t mode;
  76     uint32_t bitmode;
  77     uint32_t prescaler;
  78
  79 };
  80
  81
  82 #endif