@@ -41,3 +41,4 @@ obj-y += ftintc020.o
obj-y += ftahbc020.o
obj-y += ftddrii030.o
obj-y += ftpwmtmr010.o
+obj-y += ftwdt010.o
@@ -69,6 +69,25 @@ static void a369soc_reset(DeviceState *ds)
}
static void
+a369soc_system_reset(void *opaque)
+{
+ FaradaySoCState *s = FARADAY_SOC(opaque);
+
+ if (s->scu) {
+ device_reset(s->scu);
+ }
+ if (s->ddrc) {
+ device_reset(s->ddrc);
+ }
+ if (s->ahbc) {
+ device_reset(s->ahbc);
+ }
+ if (s->cpu) {
+ cpu_reset(CPU(s->cpu));
+ }
+}
+
+static void
a369soc_device_init(FaradaySoCState *s)
{
DriveInfo *dinfo;
@@ -161,6 +180,10 @@ a369soc_device_init(FaradaySoCState *s)
sysbus_connect_irq(SYS_BUS_DEVICE(ds), 1, pic[9]);
sysbus_connect_irq(SYS_BUS_DEVICE(ds), 2, pic[10]);
sysbus_connect_irq(SYS_BUS_DEVICE(ds), 3, pic[11]);
+
+ /* ftwdt010 */
+ sysbus_create_simple("ftwdt010", 0x92200000, pic[46]);
+ qemu_register_reset(a369soc_system_reset, s);
}
static int a369soc_init(SysBusDevice *busdev)
new file mode 100644
@@ -0,0 +1,213 @@
+/*
+ * QEMU model of the FTWDT010 WatchDog Timer
+ *
+ * Copyright (C) 2012 Faraday Technology
+ * Written by Dante Su <dantesu@faraday-tech.com>
+ *
+ * This file is licensed under GNU GPL v2+.
+ */
+
+#include "hw/sysbus.h"
+#include "sysemu/sysemu.h"
+#include "qemu/timer.h"
+
+#include "faraday.h"
+#include "ftwdt010.h"
+
+#define TYPE_FTWDT010 "ftwdt010"
+
+typedef struct Ftwdt010State {
+ SysBusDevice busdev;
+ MemoryRegion mmio;
+
+ qemu_irq irq;
+
+ QEMUTimer *qtimer;
+
+ uint64_t timeout;
+ uint64_t freq; /* desired source clock */
+ uint64_t step; /* get_ticks_per_sec() / freq */
+ bool running;
+
+ /* HW register cache */
+ uint32_t load;
+ uint32_t cr;
+ uint32_t sr;
+} Ftwdt010State;
+
+#define FTWDT010(obj) \
+ OBJECT_CHECK(Ftwdt010State, obj, TYPE_FTWDT010)
+
+static uint64_t
+ftwdt010_mem_read(void *opaque, hwaddr addr, unsigned size)
+{
+ Ftwdt010State *s = FTWDT010(opaque);
+ uint32_t ret = 0;
+
+ switch (addr) {
+ case REG_COUNTER:
+ if (s->cr & CR_EN) {
+ ret = s->timeout - qemu_get_clock_ms(rt_clock);
+ ret = MIN(s->load, ret * 1000000ULL / s->step);
+ } else {
+ ret = s->load;
+ }
+ break;
+ case REG_LOAD:
+ return s->load;
+ case REG_CR:
+ return s->cr;
+ case REG_SR:
+ return s->sr;
+ case REG_REVR:
+ return 0x00010601; /* rev. 1.6.1 */
+ default:
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "ftwdt010: undefined memory access@0x%llx\n", addr);
+ break;
+ }
+
+ return ret;
+}
+
+static void
+ftwdt010_mem_write(void *opaque, hwaddr addr, uint64_t val, unsigned size)
+{
+ Ftwdt010State *s = FTWDT010(opaque);
+
+ switch (addr) {
+ case REG_LOAD:
+ s->load = (uint32_t)val;
+ break;
+ case REG_RESTART:
+ if ((s->cr & CR_EN) && (val == WDT_MAGIC)) {
+ s->timeout = (s->step * (uint64_t)s->load) / 1000000ULL;
+ s->timeout = qemu_get_clock_ms(rt_clock) + MAX(s->timeout, 1);
+ qemu_mod_timer(s->qtimer, s->timeout);
+ }
+ break;
+ case REG_CR:
+ s->cr = (uint32_t)val;
+ if (s->cr & CR_EN) {
+ if (s->running) {
+ break;
+ }
+ s->running = true;
+ s->timeout = (s->step * (uint64_t)s->load) / 1000000ULL;
+ s->timeout = qemu_get_clock_ms(rt_clock) + MAX(s->timeout, 1);
+ qemu_mod_timer(s->qtimer, s->timeout);
+ } else {
+ s->running = false;
+ qemu_del_timer(s->qtimer);
+ }
+ break;
+ case REG_SCR:
+ s->sr &= ~(uint32_t)val;
+ break;
+ default:
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "ftwdt010: undefined memory access@0x%llx\n", addr);
+ break;
+ }
+}
+
+static const MemoryRegionOps mmio_ops = {
+ .read = ftwdt010_mem_read,
+ .write = ftwdt010_mem_write,
+ .endianness = DEVICE_LITTLE_ENDIAN,
+ .valid = {
+ .min_access_size = 4,
+ .max_access_size = 4
+ }
+};
+
+static void ftwdt010_timer_tick(void *opaque)
+{
+ Ftwdt010State *s = FTWDT010(opaque);
+
+ s->sr = SR_SRST;
+
+ /* send interrupt signal */
+ qemu_set_irq(s->irq, (s->cr & CR_INTR) ? 1 : 0);
+
+ /* send system reset */
+ if (s->cr & CR_SRST) {
+ qemu_system_reset_request();
+ }
+}
+
+static void ftwdt010_reset(DeviceState *ds)
+{
+ SysBusDevice *busdev = SYS_BUS_DEVICE(ds);
+ Ftwdt010State *s = FTWDT010(FROM_SYSBUS(Ftwdt010State, busdev));
+
+ s->cr = 0;
+ s->sr = 0;
+ s->load = 0x3ef1480;
+ s->timeout = 0;
+}
+
+static int ftwdt010_init(SysBusDevice *dev)
+{
+ Ftwdt010State *s = FTWDT010(FROM_SYSBUS(Ftwdt010State, dev));
+
+ s->step = (uint64_t)get_ticks_per_sec() / s->freq;
+ s->qtimer = qemu_new_timer_ms(rt_clock, ftwdt010_timer_tick, s);
+
+ memory_region_init_io(&s->mmio,
+ &mmio_ops,
+ s,
+ TYPE_FTWDT010,
+ 0x1000);
+ sysbus_init_mmio(dev, &s->mmio);
+ sysbus_init_irq(dev, &s->irq);
+
+ return 0;
+}
+
+static const VMStateDescription vmstate_ftwdt010 = {
+ .name = TYPE_FTWDT010,
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .minimum_version_id_old = 1,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT64(timeout, Ftwdt010State),
+ VMSTATE_UINT64(freq, Ftwdt010State),
+ VMSTATE_UINT64(step, Ftwdt010State),
+ VMSTATE_UINT32(load, Ftwdt010State),
+ VMSTATE_UINT32(cr, Ftwdt010State),
+ VMSTATE_UINT32(sr, Ftwdt010State),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+static Property ftwdt010_properties[] = {
+ DEFINE_PROP_UINT64("freq", Ftwdt010State, freq, 66000000ULL),
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void ftwdt010_class_init(ObjectClass *klass, void *data)
+{
+ SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
+ DeviceClass *dc = DEVICE_CLASS(klass);
+
+ k->init = ftwdt010_init;
+ dc->vmsd = &vmstate_ftwdt010;
+ dc->props = ftwdt010_properties;
+ dc->reset = ftwdt010_reset;
+ dc->no_user = 1;
+}
+
+static const TypeInfo ftwdt010_info = {
+ .name = TYPE_FTWDT010,
+ .parent = TYPE_SYS_BUS_DEVICE,
+ .instance_size = sizeof(Ftwdt010State),
+ .class_init = ftwdt010_class_init,
+};
+
+static void ftwdt010_register_types(void)
+{
+ type_register_static(&ftwdt010_info);
+}
+
+type_init(ftwdt010_register_types)
new file mode 100644
@@ -0,0 +1,33 @@
+/*
+ * QEMU model of the FTWDT010 WatchDog Timer
+ *
+ * Copyright (C) 2012 Faraday Technology
+ * Written by Dante Su <dantesu@faraday-tech.com>
+ *
+ * This file is licensed under GNU GPL v2+.
+ */
+
+#ifndef HW_ARM_FTWDT010_H
+#define HW_ARM_FTWDT010_H
+
+/* Hardware registers */
+#define REG_COUNTER 0x00 /* counter register */
+#define REG_LOAD 0x04 /* (re)load register */
+#define REG_RESTART 0x08 /* restart register */
+#define REG_CR 0x0C /* control register */
+#define REG_SR 0x10 /* status register */
+#define REG_SCR 0x14 /* status clear register */
+#define REG_INTR_LEN 0x18 /* interrupt length register */
+#define REG_REVR 0x1C /* revision register */
+
+#define CR_CLKS BIT(4) /* clock source */
+#define CR_ESIG BIT(3) /* external signal enabled */
+#define CR_INTR BIT(2) /* system reset interrupt enabled */
+#define CR_SRST BIT(1) /* system reset enabled */
+#define CR_EN BIT(0) /* chip enabled */
+
+#define SR_SRST BIT(1) /* system reset */
+
+#define WDT_MAGIC 0x5ab9 /* magic for watchdog restart */
+
+#endif