This patch adds the Netduino Plus 2 timers: TIM2, TIM3, TIM4 and TIM5 to QEMU.
Signed-off-by: Alistair Francis <alistai...@gmail.com> --- hw/timer/Makefile.objs | 1 + hw/timer/netduino_timer.c | 384 ++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 385 insertions(+) create mode 100644 hw/timer/netduino_timer.c diff --git a/hw/timer/Makefile.objs b/hw/timer/Makefile.objs index 2c86c3d..104fc46 100644 --- a/hw/timer/Makefile.objs +++ b/hw/timer/Makefile.objs @@ -17,6 +17,7 @@ common-obj-$(CONFIG_IMX) += imx_epit.o common-obj-$(CONFIG_IMX) += imx_gpt.o common-obj-$(CONFIG_LM32) += lm32_timer.o common-obj-$(CONFIG_MILKYMIST) += milkymist-sysctl.o +common-obj-$(CONFIG_NETDUINOP2) += netduino_timer.o obj-$(CONFIG_EXYNOS4) += exynos4210_mct.o obj-$(CONFIG_EXYNOS4) += exynos4210_pwm.o diff --git a/hw/timer/netduino_timer.c b/hw/timer/netduino_timer.c new file mode 100644 index 0000000..212ba48 --- /dev/null +++ b/hw/timer/netduino_timer.c @@ -0,0 +1,384 @@ +/* + * Netduino Plus 2 USART + * + * Copyright (c) 2014 Alistair Francis <alist...@alistair23.me> + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ + +#include "hw/sysbus.h" +#include "qemu/timer.h" +#include "sysemu/sysemu.h" + +#define DEBUG_NETTIMER + +#ifdef DEBUG_NETTIMER +#define DPRINTF(fmt, ...) \ +do { printf("netduino_timer: " fmt , ## __VA_ARGS__); } while (0) +#else +#define DPRINTF(fmt, ...) do {} while (0) +#endif + +#define TIM_CR1 0x00 +#define TIM_CR2 0x04 +#define TIM_SMCR 0x08 +#define TIM_DIER 0x0C +#define TIM_SR 0x10 +#define TIM_EGR 0x14 +#define TIM_CCMR1 0x18 +#define TIM_CCMR2 0x1C +#define TIM_CCER 0x20 +#define TIM_CNT 0x24 +#define TIM_PSC 0x28 +#define TIM_ARR 0x2C +#define TIM_CCR1 0x34 +#define TIM_CCR2 0x38 +#define TIM_CCR3 0x3C +#define TIM_CCR4 0x40 +#define TIM_DCR 0x48 +#define TIM_DMAR 0x4C +#define TIM_OR 0x50 + +#define TIM_CR1_CEN 1 + +#define TYPE_NETTIMER "netduino_timer" +#define NETTIMER(obj) OBJECT_CHECK(NETTIMERState, (obj), TYPE_NETTIMER) + +typedef struct NETTIMERState { + SysBusDevice parent_obj; + + MemoryRegion iomem; + QEMUTimer *timer; + qemu_irq irq; + + uint32_t tick_offset_vmstate; + uint32_t tick_offset; + + uint32_t tim_cr1; + uint32_t tim_cr2; + uint32_t tim_smcr; + uint32_t tim_dier; + uint32_t tim_sr; + uint32_t tim_egr; + uint32_t tim_ccmr1; + uint32_t tim_ccmr2; + uint32_t tim_ccer; + uint32_t tim_cnt; + uint32_t tim_psc; + uint32_t tim_arr; + uint32_t tim_ccr1; + uint32_t tim_ccr2; + uint32_t tim_ccr3; + uint32_t tim_ccr4; + uint32_t tim_dcr; + uint32_t tim_dmar; + uint32_t tim_or; +} NETTIMERState; + +static void netduino_timer_update(NETTIMERState *s) +{ + s->tim_sr |= 1; + qemu_set_irq(s->irq, 1); + qemu_set_irq(s->irq, 0); +} + +static void netduino_timer_interrupt(void *opaque) +{ + NETTIMERState *s = (NETTIMERState *)opaque; + + DPRINTF("INterrupt\n"); + + if (s->tim_dier == 0x01 && s->tim_cr1 & TIM_CR1_CEN) { + netduino_timer_update(s); + } +} + +static uint32_t netduino_timer_get_count(NETTIMERState *s) +{ + int64_t now = qemu_clock_get_ns(rtc_clock); + return s->tick_offset + now / get_ticks_per_sec(); +} + +static void netduino_timer_set_alarm(NETTIMERState *s) +{ + uint32_t ticks; + + DPRINTF("Alarm raised: 0x%x\n", s->tim_cr1); + + ticks = (uint32_t) (s->tim_arr - netduino_timer_get_count(s)/ + (s->tim_psc + 1)); + DPRINTF("Alarm set in %u ticks\n", ticks); + if (ticks <= 0) { + timer_del(s->timer); + netduino_timer_interrupt(s); + } else { + int64_t now = qemu_clock_get_ns(rtc_clock); + timer_mod(s->timer, now + (int64_t)ticks); + DPRINTF("Wait Time: 0x%x\n", (uint32_t) (now + ticks)); + } +} + +static void netduino_timer_reset(DeviceState *dev) +{ + struct NETTIMERState *s = NETTIMER(dev); + + s->tim_cr1 = 0; + s->tim_cr2 = 0; + s->tim_smcr = 0; + s->tim_dier = 0; + s->tim_sr = 0; + s->tim_egr = 0; + s->tim_ccmr1 = 0; + s->tim_ccmr2 = 0; + s->tim_ccer = 0; + s->tim_cnt = 0; + s->tim_psc = 0; + s->tim_arr = 0; + s->tim_ccr1 = 0; + s->tim_ccr2 = 0; + s->tim_ccr3 = 0; + s->tim_ccr4 = 0; + s->tim_dcr = 0; + s->tim_dmar = 0; + s->tim_or = 0; +} + +static uint64_t netduino_timer_read(void *opaque, hwaddr offset, + unsigned size) +{ + NETTIMERState *s = (NETTIMERState *)opaque; + + DPRINTF("Read 0x%x\n", (uint) offset); + + switch (offset) { + case TIM_CR1: + return s->tim_cr1; + case TIM_CR2: + return s->tim_cr2; + case TIM_SMCR: + return s->tim_smcr; + case TIM_DIER: + return s->tim_dier; + case TIM_SR: + return s->tim_sr; + case TIM_EGR: + return s->tim_egr; + case TIM_CCMR1: + return s->tim_ccmr1; + case TIM_CCMR2: + return s->tim_ccmr2; + case TIM_CCER: + return s->tim_ccer; + case TIM_CNT: + return s->tim_cnt; + case TIM_PSC: + return s->tim_psc; + case TIM_ARR: + return s->tim_arr; + case TIM_CCR1: + return s->tim_ccr1; + case TIM_CCR2: + return s->tim_ccr2; + case TIM_CCR3: + return s->tim_ccr3; + case TIM_CCR4: + return s->tim_ccr4; + case TIM_DCR: + return s->tim_dcr; + case TIM_DMAR: + return s->tim_dmar; + case TIM_OR: + return s->tim_or; + } + + return 0; +} + +static void netduino_timer_write(void *opaque, hwaddr offset, + uint64_t val64, unsigned size) +{ + NETTIMERState *s = (NETTIMERState *)opaque; + uint32_t value = (uint32_t) val64; + + DPRINTF("Write 0x%x, 0x%x\n", value, (uint) offset); + + switch (offset) { + case TIM_CR1: + s->tim_cr1 = value; + return; + case TIM_CR2: + s->tim_cr2 = value; + return; + case TIM_SMCR: + s->tim_smcr = value; + return; + case TIM_DIER: + s->tim_dier = value; + return; + case TIM_SR: + s->tim_sr &= value; + netduino_timer_set_alarm(s); + return; + case TIM_EGR: + s->tim_egr = value; + return; + case TIM_CCMR1: + s->tim_ccmr1 = value; + return; + case TIM_CCMR2: + s->tim_ccmr2 = value; + return; + case TIM_CCER: + s->tim_ccer = value; + return; + case TIM_CNT: + s->tim_cnt = value; + netduino_timer_set_alarm(s); + return; + case TIM_PSC: + s->tim_psc = value; + return; + case TIM_ARR: + s->tim_arr = value; + netduino_timer_set_alarm(s); + return; + case TIM_CCR1: + s->tim_ccr1 = value; + return; + case TIM_CCR2: + s->tim_ccr2 = value; + return; + case TIM_CCR3: + s->tim_ccr3 = value; + return; + case TIM_CCR4: + s->tim_ccr4 = value; + return; + case TIM_DCR: + s->tim_dcr = value; + return; + case TIM_DMAR: + s->tim_dmar = value; + return; + case TIM_OR: + s->tim_or = value; + return; + } +} + +static const MemoryRegionOps netduino_timer_ops = { + .read = netduino_timer_read, + .write = netduino_timer_write, + .endianness = DEVICE_NATIVE_ENDIAN, +}; + +static int netduino_timer_init(SysBusDevice *dev) +{ + NETTIMERState *s = NETTIMER(dev); + struct tm tm; + + sysbus_init_irq(dev, &s->irq); + + memory_region_init_io(&s->iomem, OBJECT(s), &netduino_timer_ops, s, + "netduino_timer", 0x2000); + sysbus_init_mmio(dev, &s->iomem); + + qemu_get_timedate(&tm, 0); + s->tick_offset = mktimegm(&tm) - + qemu_clock_get_ns(rtc_clock) / get_ticks_per_sec(); + + s->timer = timer_new_ns(rtc_clock, netduino_timer_interrupt, s); + + return 0; +} + +static void netduino_timer_pre_save(void *opaque) +{ + NETTIMERState *s = (NETTIMERState *)opaque; + + int64_t delta = qemu_clock_get_ns(rtc_clock) - + qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); + s->tick_offset_vmstate = s->tick_offset + delta / get_ticks_per_sec(); +} + +static int netduino_timer_post_load(void *opaque, int version_id) +{ + NETTIMERState *s = (NETTIMERState *)opaque; + + int64_t delta = qemu_clock_get_ns(rtc_clock) - + qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); + s->tick_offset = s->tick_offset_vmstate - delta / get_ticks_per_sec(); + netduino_timer_set_alarm(s); + return 0; +} + +static const VMStateDescription vmstate_netduino_timer = { + .name = "netduino_timer", + .version_id = 1, + .minimum_version_id = 1, + .pre_save = netduino_timer_pre_save, + .post_load = netduino_timer_post_load, + .fields = (VMStateField[]) { + VMSTATE_UINT32(tick_offset_vmstate, NETTIMERState), + VMSTATE_UINT32(tim_cr1, NETTIMERState), + VMSTATE_UINT32(tim_cr2, NETTIMERState), + VMSTATE_UINT32(tim_smcr, NETTIMERState), + VMSTATE_UINT32(tim_dier, NETTIMERState), + VMSTATE_UINT32(tim_sr, NETTIMERState), + VMSTATE_UINT32(tim_egr, NETTIMERState), + VMSTATE_UINT32(tim_ccmr1, NETTIMERState), + VMSTATE_UINT32(tim_ccmr1, NETTIMERState), + VMSTATE_UINT32(tim_ccer, NETTIMERState), + VMSTATE_UINT32(tim_cnt, NETTIMERState), + VMSTATE_UINT32(tim_psc, NETTIMERState), + VMSTATE_UINT32(tim_arr, NETTIMERState), + VMSTATE_UINT32(tim_ccr1, NETTIMERState), + VMSTATE_UINT32(tim_ccr2, NETTIMERState), + VMSTATE_UINT32(tim_ccr3, NETTIMERState), + VMSTATE_UINT32(tim_ccr4, NETTIMERState), + VMSTATE_UINT32(tim_dcr, NETTIMERState), + VMSTATE_UINT32(tim_dmar, NETTIMERState), + VMSTATE_UINT32(tim_or, NETTIMERState), + VMSTATE_END_OF_LIST() + } +}; + +static void netduino_timer_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); + + k->init = netduino_timer_init; + dc->vmsd = &vmstate_netduino_timer; + dc->reset = netduino_timer_reset; +} + +static const TypeInfo netduino_timer_info = { + .name = TYPE_NETTIMER, + .parent = TYPE_SYS_BUS_DEVICE, + .instance_size = sizeof(NETTIMERState), + .class_init = netduino_timer_class_init, +}; + +static void netduino_timer_register_types(void) +{ + type_register_static(&netduino_timer_info); +} + +type_init(netduino_timer_register_types) -- 1.9.1