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hw/timer: add allwinner a10 timer

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Signed-off-by: liguang <lig.fnst@cn.fujitsu.com>
Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Message-id: 1387159292-10436-3-git-send-email-lig.fnst@cn.fujitsu.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
liguang 2013-12-17 19:42:37 +00:00 committed by Peter Maydell
parent a1f05e79f2
commit 3589de8c97
4 changed files with 316 additions and 0 deletions
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2
default-configs/arm-softmmu.mak
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@ -83,3 +83,5 @@ CONFIG_VERSATILE_I2C=y
CONFIG_SDHCI=y
CONFIG_INTEGRATOR_DEBUG=y
CONFIG_ALLWINNER_A10_PIT=y

2
hw/timer/Makefile.objs
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@ -29,3 +29,5 @@ obj-$(CONFIG_TUSB6010) += tusb6010.o
obj-$(CONFIG_DIGIC) += digic-timer.o
obj-$(CONFIG_MC146818RTC) += mc146818rtc.o
obj-$(CONFIG_ALLWINNER_A10_PIT) += allwinner-a10-pit.o

254
hw/timer/allwinner-a10-pit.c Normal file
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@ -0,0 +1,254 @@
/*
* Allwinner A10 timer device emulation
*
* Copyright (C) 2013 Li Guang
* Written by Li Guang <lig.fnst@cn.fujitsu.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#include "hw/sysbus.h"
#include "sysemu/sysemu.h"
#include "hw/timer/allwinner-a10-pit.h"
static uint64_t a10_pit_read(void *opaque, hwaddr offset, unsigned size)
{
AwA10PITState *s = AW_A10_PIT(opaque);
uint8_t index;
switch (offset) {
case AW_A10_PIT_TIMER_IRQ_EN:
return s->irq_enable;
case AW_A10_PIT_TIMER_IRQ_ST:
return s->irq_status;
case AW_A10_PIT_TIMER_BASE ... AW_A10_PIT_TIMER_BASE_END:
index = offset & 0xf0;
index >>= 4;
index -= 1;
switch (offset & 0x0f) {
case AW_A10_PIT_TIMER_CONTROL:
return s->control[index];
case AW_A10_PIT_TIMER_INTERVAL:
return s->interval[index];
case AW_A10_PIT_TIMER_COUNT:
s->count[index] = ptimer_get_count(s->timer[index]);
return s->count[index];
default:
qemu_log_mask(LOG_GUEST_ERROR,
"%s: Bad offset 0x%x\n", __func__, (int)offset);
break;
}
case AW_A10_PIT_WDOG_CONTROL:
break;
case AW_A10_PIT_WDOG_MODE:
break;
case AW_A10_PIT_COUNT_LO:
return s->count_lo;
case AW_A10_PIT_COUNT_HI:
return s->count_hi;
case AW_A10_PIT_COUNT_CTL:
return s->count_ctl;
default:
qemu_log_mask(LOG_GUEST_ERROR,
"%s: Bad offset 0x%x\n", __func__, (int)offset);
break;
}
return 0;
}
static void a10_pit_write(void *opaque, hwaddr offset, uint64_t value,
unsigned size)
{
AwA10PITState *s = AW_A10_PIT(opaque);
uint8_t index;
switch (offset) {
case AW_A10_PIT_TIMER_IRQ_EN:
s->irq_enable = value;
break;
case AW_A10_PIT_TIMER_IRQ_ST:
s->irq_status &= ~value;
break;
case AW_A10_PIT_TIMER_BASE ... AW_A10_PIT_TIMER_BASE_END:
index = offset & 0xf0;
index >>= 4;
index -= 1;
switch (offset & 0x0f) {
case AW_A10_PIT_TIMER_CONTROL:
s->control[index] = value;
if (s->control[index] & AW_A10_PIT_TIMER_RELOAD) {
ptimer_set_count(s->timer[index], s->interval[index]);
}
if (s->control[index] & AW_A10_PIT_TIMER_EN) {
int oneshot = 0;
if (s->control[index] & AW_A10_PIT_TIMER_MODE) {
oneshot = 1;
}
ptimer_run(s->timer[index], oneshot);
} else {
ptimer_stop(s->timer[index]);
}
break;
case AW_A10_PIT_TIMER_INTERVAL:
s->interval[index] = value;
ptimer_set_limit(s->timer[index], s->interval[index], 1);
break;
case AW_A10_PIT_TIMER_COUNT:
s->count[index] = value;
break;
default:
qemu_log_mask(LOG_GUEST_ERROR,
"%s: Bad offset 0x%x\n", __func__, (int)offset);
}
break;
case AW_A10_PIT_WDOG_CONTROL:
s->watch_dog_control = value;
break;
case AW_A10_PIT_WDOG_MODE:
s->watch_dog_mode = value;
break;
case AW_A10_PIT_COUNT_LO:
s->count_lo = value;
break;
case AW_A10_PIT_COUNT_HI:
s->count_hi = value;
break;
case AW_A10_PIT_COUNT_CTL:
s->count_ctl = value;
if (s->count_ctl & AW_A10_PIT_COUNT_RL_EN) {
uint64_t tmp_count = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
s->count_lo = tmp_count;
s->count_hi = tmp_count >> 32;
s->count_ctl &= ~AW_A10_PIT_COUNT_RL_EN;
}
if (s->count_ctl & AW_A10_PIT_COUNT_CLR_EN) {
s->count_lo = 0;
s->count_hi = 0;
s->count_ctl &= ~AW_A10_PIT_COUNT_CLR_EN;
}
break;
default:
qemu_log_mask(LOG_GUEST_ERROR,
"%s: Bad offset 0x%x\n", __func__, (int)offset);
break;
}
}
static const MemoryRegionOps a10_pit_ops = {
.read = a10_pit_read,
.write = a10_pit_write,
.endianness = DEVICE_NATIVE_ENDIAN,
};
static const VMStateDescription vmstate_a10_pit = {
.name = "a10.pit",
.version_id = 1,
.minimum_version_id = 1,
.minimum_version_id_old = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT32(irq_enable, AwA10PITState),
VMSTATE_UINT32(irq_status, AwA10PITState),
VMSTATE_UINT32_ARRAY(control, AwA10PITState, AW_A10_PIT_TIMER_NR),
VMSTATE_UINT32_ARRAY(interval, AwA10PITState, AW_A10_PIT_TIMER_NR),
VMSTATE_UINT32_ARRAY(count, AwA10PITState, AW_A10_PIT_TIMER_NR),
VMSTATE_UINT32(watch_dog_mode, AwA10PITState),
VMSTATE_UINT32(watch_dog_control, AwA10PITState),
VMSTATE_UINT32(count_lo, AwA10PITState),
VMSTATE_UINT32(count_hi, AwA10PITState),
VMSTATE_UINT32(count_ctl, AwA10PITState),
VMSTATE_PTIMER_ARRAY(timer, AwA10PITState, AW_A10_PIT_TIMER_NR),
VMSTATE_END_OF_LIST()
}
};
static void a10_pit_reset(DeviceState *dev)
{
AwA10PITState *s = AW_A10_PIT(dev);
uint8_t i;
s->irq_enable = 0;
s->irq_status = 0;
for (i = 0; i < 6; i++) {
s->control[i] = AW_A10_PIT_DEFAULT_CLOCK;
s->interval[i] = 0;
s->count[i] = 0;
ptimer_stop(s->timer[i]);
}
s->watch_dog_mode = 0;
s->watch_dog_control = 0;
s->count_lo = 0;
s->count_hi = 0;
s->count_ctl = 0;
}
static void a10_pit_timer_cb(void *opaque)
{
AwA10PITState *s = AW_A10_PIT(opaque);
uint8_t i;
for (i = 0; i < AW_A10_PIT_TIMER_NR; i++) {
if (s->control[i] & AW_A10_PIT_TIMER_EN) {
s->irq_status |= 1 << i;
if (s->control[i] & AW_A10_PIT_TIMER_MODE) {
ptimer_stop(s->timer[i]);
s->control[i] &= ~AW_A10_PIT_TIMER_EN;
}
qemu_irq_pulse(s->irq[i]);
}
}
}
static void a10_pit_init(Object *obj)
{
AwA10PITState *s = AW_A10_PIT(obj);
SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
QEMUBH * bh[AW_A10_PIT_TIMER_NR];
uint8_t i;
for (i = 0; i < AW_A10_PIT_TIMER_NR; i++) {
sysbus_init_irq(sbd, &s->irq[i]);
}
memory_region_init_io(&s->iomem, OBJECT(s), &a10_pit_ops, s,
TYPE_AW_A10_PIT, 0x400);
sysbus_init_mmio(sbd, &s->iomem);
for (i = 0; i < AW_A10_PIT_TIMER_NR; i++) {
bh[i] = qemu_bh_new(a10_pit_timer_cb, s);
s->timer[i] = ptimer_init(bh[i]);
ptimer_set_freq(s->timer[i], 240000);
}
}
static void a10_pit_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->reset = a10_pit_reset;
dc->desc = "allwinner a10 timer";
dc->vmsd = &vmstate_a10_pit;
}
static const TypeInfo a10_pit_info = {
.name = TYPE_AW_A10_PIT,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(AwA10PITState),
.instance_init = a10_pit_init,
.class_init = a10_pit_class_init,
};
static void a10_register_types(void)
{
type_register_static(&a10_pit_info);
}
type_init(a10_register_types);

58
include/hw/timer/allwinner-a10-pit.h Normal file
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@ -0,0 +1,58 @@
#ifndef AW_A10_PIT_H
#define AW_A10_PIT_H
#include "hw/ptimer.h"
#define TYPE_AW_A10_PIT "allwinner-A10-timer"
#define AW_A10_PIT(obj) OBJECT_CHECK(AwA10PITState, (obj), TYPE_AW_A10_PIT)
#define AW_A10_PIT_TIMER_NR 6
#define AW_A10_PIT_TIMER_IRQ 0x1
#define AW_A10_PIT_WDOG_IRQ 0x100
#define AW_A10_PIT_TIMER_IRQ_EN 0
#define AW_A10_PIT_TIMER_IRQ_ST 0x4
#define AW_A10_PIT_TIMER_CONTROL 0x0
#define AW_A10_PIT_TIMER_EN 0x1
#define AW_A10_PIT_TIMER_RELOAD 0x2
#define AW_A10_PIT_TIMER_MODE 0x80
#define AW_A10_PIT_TIMER_INTERVAL 0x4
#define AW_A10_PIT_TIMER_COUNT 0x8
#define AW_A10_PIT_WDOG_CONTROL 0x90
#define AW_A10_PIT_WDOG_MODE 0x94
#define AW_A10_PIT_COUNT_CTL 0xa0
#define AW_A10_PIT_COUNT_RL_EN 0x2
#define AW_A10_PIT_COUNT_CLR_EN 0x1
#define AW_A10_PIT_COUNT_LO 0xa4
#define AW_A10_PIT_COUNT_HI 0xa8
#define AW_A10_PIT_TIMER_BASE 0x10
#define AW_A10_PIT_TIMER_BASE_END \
(AW_A10_PIT_TIMER_BASE * 6 + AW_A10_PIT_TIMER_COUNT)
#define AW_A10_PIT_DEFAULT_CLOCK 0x4
typedef struct AwA10PITState {
/*< private >*/
SysBusDevice parent_obj;
/*< public >*/
qemu_irq irq[AW_A10_PIT_TIMER_NR];
ptimer_state * timer[AW_A10_PIT_TIMER_NR];
MemoryRegion iomem;
uint32_t irq_enable;
uint32_t irq_status;
uint32_t control[AW_A10_PIT_TIMER_NR];
uint32_t interval[AW_A10_PIT_TIMER_NR];
uint32_t count[AW_A10_PIT_TIMER_NR];
uint32_t watch_dog_mode;
uint32_t watch_dog_control;
uint32_t count_lo;
uint32_t count_hi;
uint32_t count_ctl;
} AwA10PITState;
#endif