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 | 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 | |