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 typedef struct NRF51TimerState NRF51TimerState; 21 DECLARE_INSTANCE_CHECKER(NRF51TimerState, NRF51_TIMER, 22 TYPE_NRF51_TIMER) 23 24 #define NRF51_TIMER_REG_COUNT 4 25 26 #define NRF51_TIMER_TASK_START 0x000 27 #define NRF51_TIMER_TASK_STOP 0x004 28 #define NRF51_TIMER_TASK_COUNT 0x008 29 #define NRF51_TIMER_TASK_CLEAR 0x00C 30 #define NRF51_TIMER_TASK_SHUTDOWN 0x010 31 #define NRF51_TIMER_TASK_CAPTURE_0 0x040 32 #define NRF51_TIMER_TASK_CAPTURE_3 0x04C 33 34 #define NRF51_TIMER_EVENT_COMPARE_0 0x140 35 #define NRF51_TIMER_EVENT_COMPARE_1 0x144 36 #define NRF51_TIMER_EVENT_COMPARE_2 0x148 37 #define NRF51_TIMER_EVENT_COMPARE_3 0x14C 38 39 #define NRF51_TIMER_REG_SHORTS 0x200 40 #define NRF51_TIMER_REG_SHORTS_MASK 0xf0f 41 #define NRF51_TIMER_REG_INTENSET 0x304 42 #define NRF51_TIMER_REG_INTENCLR 0x308 43 #define NRF51_TIMER_REG_INTEN_MASK 0xf0000 44 #define NRF51_TIMER_REG_MODE 0x504 45 #define NRF51_TIMER_REG_MODE_MASK 0x01 46 #define NRF51_TIMER_TIMER 0 47 #define NRF51_TIMER_COUNTER 1 48 #define NRF51_TIMER_REG_BITMODE 0x508 49 #define NRF51_TIMER_REG_BITMODE_MASK 0x03 50 #define NRF51_TIMER_WIDTH_16 0 51 #define NRF51_TIMER_WIDTH_8 1 52 #define NRF51_TIMER_WIDTH_24 2 53 #define NRF51_TIMER_WIDTH_32 3 54 #define NRF51_TIMER_REG_PRESCALER 0x510 55 #define NRF51_TIMER_REG_PRESCALER_MASK 0x0F 56 #define NRF51_TIMER_REG_CC0 0x540 57 #define NRF51_TIMER_REG_CC3 0x54C 58 59 struct NRF51TimerState { 60 SysBusDevice parent_obj; 61 62 MemoryRegion iomem; 63 qemu_irq irq; 64 65 uint8_t id; 66 QEMUTimer timer; 67 int64_t timer_start_ns; 68 int64_t update_counter_ns; 69 uint32_t counter; 70 71 bool running; 72 73 uint8_t events_compare[NRF51_TIMER_REG_COUNT]; 74 uint32_t cc[NRF51_TIMER_REG_COUNT]; 75 uint32_t shorts; 76 uint32_t inten; 77 uint32_t mode; 78 uint32_t bitmode; 79 uint32_t prescaler; 80 81 }; 82 83 84 #endif 85