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 #define TYPE_NRF51_TIMER "nrf51_soc.timer"
  19 #define NRF51_TIMER(obj) OBJECT_CHECK(NRF51TimerState, (obj), TYPE_NRF51_TIMER)
  20
  21 #define NRF51_TIMER_REG_COUNT 4
  22
  23 #define NRF51_TIMER_TASK_START 0x000
  24 #define NRF51_TIMER_TASK_STOP 0x004
  25 #define NRF51_TIMER_TASK_COUNT 0x008
  26 #define NRF51_TIMER_TASK_CLEAR 0x00C
  27 #define NRF51_TIMER_TASK_SHUTDOWN 0x010
  28 #define NRF51_TIMER_TASK_CAPTURE_0 0x040
  29 #define NRF51_TIMER_TASK_CAPTURE_3 0x04C
  30
  31 #define NRF51_TIMER_EVENT_COMPARE_0 0x140
  32 #define NRF51_TIMER_EVENT_COMPARE_1 0x144
  33 #define NRF51_TIMER_EVENT_COMPARE_2 0x148
  34 #define NRF51_TIMER_EVENT_COMPARE_3 0x14C
  35
  36 #define NRF51_TIMER_REG_SHORTS 0x200
  37 #define NRF51_TIMER_REG_SHORTS_MASK 0xf0f
  38 #define NRF51_TIMER_REG_INTENSET 0x304
  39 #define NRF51_TIMER_REG_INTENCLR 0x308
  40 #define NRF51_TIMER_REG_INTEN_MASK 0xf0000
  41 #define NRF51_TIMER_REG_MODE 0x504
  42 #define NRF51_TIMER_REG_MODE_MASK 0x01
  43 #define NRF51_TIMER_TIMER 0
  44 #define NRF51_TIMER_COUNTER 1
  45 #define NRF51_TIMER_REG_BITMODE 0x508
  46 #define NRF51_TIMER_REG_BITMODE_MASK 0x03
  47 #define NRF51_TIMER_WIDTH_16 0
  48 #define NRF51_TIMER_WIDTH_8 1
  49 #define NRF51_TIMER_WIDTH_24 2
  50 #define NRF51_TIMER_WIDTH_32 3
  51 #define NRF51_TIMER_REG_PRESCALER 0x510
  52 #define NRF51_TIMER_REG_PRESCALER_MASK 0x0F
  53 #define NRF51_TIMER_REG_CC0 0x540
  54 #define NRF51_TIMER_REG_CC3 0x54C
  55
  56 typedef struct NRF51TimerState {
  57     SysBusDevice parent_obj;
  58
  59     MemoryRegion iomem;
  60     qemu_irq irq;
  61
  62     uint8_t id;
  63     QEMUTimer timer;
  64     int64_t timer_start_ns;
  65     int64_t update_counter_ns;
  66     uint32_t counter;
  67
  68     bool running;
  69
  70     uint8_t events_compare[NRF51_TIMER_REG_COUNT];
  71     uint32_t cc[NRF51_TIMER_REG_COUNT];
  72     uint32_t shorts;
  73     uint32_t inten;
  74     uint32_t mode;
  75     uint32_t bitmode;
  76     uint32_t prescaler;
  77
  78 } NRF51TimerState;
  79
  80
  81 #endif