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Extracted iPod Touch timer to separate file
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,143 @@ | ||
| #include "hw/arm/ipod_touch_timer.h" | ||
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| static void s5l8900_st_update(IPodTouchTimerState *s) | ||
| { | ||
| s->freq_out = 1000000000 / 100; | ||
| s->tick_interval = /* bcount1 * get_ticks / freq + ((bcount2 * get_ticks / freq)*/ | ||
| muldiv64((s->bcount1 < 1000) ? 1000 : s->bcount1, NANOSECONDS_PER_SECOND, s->freq_out); | ||
| s->next_planned_tick = 0; | ||
| } | ||
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| static void s5l8900_st_set_timer(IPodTouchTimerState *s) | ||
| { | ||
| uint64_t last = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) - s->base_time; | ||
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| s->next_planned_tick = last + (s->tick_interval - last % s->tick_interval); | ||
| timer_mod(s->st_timer, s->next_planned_tick + s->base_time); | ||
| s->last_tick = last; | ||
| } | ||
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| static void s5l8900_st_tick(void *opaque) | ||
| { | ||
| IPodTouchTimerState *s = (IPodTouchTimerState *)opaque; | ||
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| if (s->status & TIMER_STATE_START) { | ||
| //fprintf(stderr, "%s: Raising irq\n", __func__); | ||
| qemu_irq_raise(s->irq); | ||
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| /* schedule next interrupt */ | ||
| if(!(s->status & TIMER_STATE_MANUALUPDATE)) { | ||
| s5l8900_st_set_timer(s); | ||
| } | ||
| } else { | ||
| s->next_planned_tick = 0; | ||
| s->last_tick = 0; | ||
| timer_del(s->st_timer); | ||
| } | ||
| } | ||
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| static void s5l8900_timer1_write(void *opaque, hwaddr addr, uint64_t value, unsigned size) | ||
| { | ||
| //fprintf(stderr, "%s: writing 0x%08x to 0x%08x\n", __func__, value, addr); | ||
| IPodTouchTimerState *s = (struct IPodTouchTimerState *) opaque; | ||
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| switch(addr){ | ||
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| case TIMER_IRQSTAT: | ||
| s->irqstat = value; | ||
| return; | ||
| case TIMER_IRQLATCH: | ||
| //fprintf(stderr, "%s: lowering irq\n", __func__); | ||
| qemu_irq_lower(s->irq); | ||
| return; | ||
| case TIMER_4 + TIMER_CONFIG: | ||
| s5l8900_st_update(s); | ||
| s->config = value; | ||
| break; | ||
| case TIMER_4 + TIMER_STATE: | ||
| if (value & TIMER_STATE_START) { | ||
| s->base_time = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); | ||
| s5l8900_st_update(s); | ||
| s5l8900_st_set_timer(s); | ||
| } else if (value == TIMER_STATE_STOP) { | ||
| timer_del(s->st_timer); | ||
| } | ||
| s->status = value; | ||
| break; | ||
| case TIMER_4 + TIMER_COUNT_BUFFER: | ||
| s->bcount1 = s->bcreload = value; | ||
| break; | ||
| case TIMER_4 + TIMER_COUNT_BUFFER2: | ||
| s->bcount2 = value; | ||
| break; | ||
| default: | ||
| break; | ||
| } | ||
| } | ||
|
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| static uint64_t s5l8900_timer1_read(void *opaque, hwaddr addr, unsigned size) | ||
| { | ||
| //fprintf(stderr, "%s: read from location 0x%08x\n", __func__, addr); | ||
| IPodTouchTimerState *s = (struct IPodTouchTimerState *) opaque; | ||
| uint64_t elapsed_ns, ticks; | ||
|
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| switch (addr) { | ||
| case TIMER_TICKSHIGH: // needs to be fixed so that read from low first works as well | ||
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| elapsed_ns = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); | ||
| ticks = clock_ns_to_ticks(s->sysclk, elapsed_ns); | ||
| //printf("TICKS: %lld\n", ticks); | ||
| s->ticks_high = (ticks >> 32); | ||
| s->ticks_low = (ticks & 0xFFFFFFFF); | ||
| return s->ticks_high; | ||
| case TIMER_TICKSLOW: | ||
| return s->ticks_low; | ||
| case TIMER_IRQSTAT: | ||
| return ~0; // s->irqstat; | ||
| case TIMER_IRQLATCH: | ||
| return 0xffffffff; | ||
|
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| default: | ||
| break; | ||
| } | ||
| return 0; | ||
| } | ||
|
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| static const MemoryRegionOps timer1_ops = { | ||
| .read = s5l8900_timer1_read, | ||
| .write = s5l8900_timer1_write, | ||
| .endianness = DEVICE_NATIVE_ENDIAN, | ||
| }; | ||
|
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| static void s5l8900_timer_init(Object *obj) | ||
| { | ||
| SysBusDevice *sbd = SYS_BUS_DEVICE(obj); | ||
| DeviceState *dev = DEVICE(sbd); | ||
| IPodTouchTimerState *s = IPOD_TOUCH_TIMER(dev); | ||
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| memory_region_init_io(&s->iomem, obj, &timer1_ops, s, "timer1", 0x10001); | ||
| sysbus_init_irq(sbd, &s->irq); | ||
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| s->base_time = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); | ||
| s->st_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, s5l8900_st_tick, s); | ||
| } | ||
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| static void s5l8900_timer_class_init(ObjectClass *klass, void *data) | ||
| { | ||
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| } | ||
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| static const TypeInfo ipod_touch_timer_info = { | ||
| .name = TYPE_IPOD_TOUCH_TIMER, | ||
| .parent = TYPE_SYS_BUS_DEVICE, | ||
| .instance_size = sizeof(IPodTouchTimerState), | ||
| .instance_init = s5l8900_timer_init, | ||
| .class_init = s5l8900_timer_class_init, | ||
| }; | ||
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| static void ipod_touch_machine_types(void) | ||
| { | ||
| type_register_static(&ipod_touch_timer_info); | ||
| } | ||
|
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| type_init(ipod_touch_machine_types) |
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