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