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
56typedef struct NRF51TimerState {
57 SysBusDevice parent_obj;
58
59 MemoryRegion iomem;
60 qemu_irq irq;
61
62 QEMUTimer timer;
63 int64_t timer_start_ns;
64 int64_t update_counter_ns;
65 uint32_t counter;
66
67 bool running;
68
69 uint8_t events_compare[NRF51_TIMER_REG_COUNT];
70 uint32_t cc[NRF51_TIMER_REG_COUNT];
71 uint32_t shorts;
72 uint32_t inten;
73 uint32_t mode;
74 uint32_t bitmode;
75 uint32_t prescaler;
76
77} NRF51TimerState;
78
79
80#endif
81