0b8fa32f55
Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20190523143508.25387-4-armbru@redhat.com> [Rebased with conflicts resolved automatically, except for hw/usb/dev-hub.c hw/misc/exynos4210_rng.c hw/misc/bcm2835_rng.c hw/misc/aspeed_scu.c hw/display/virtio-vga.c hw/arm/stm32f205_soc.c; ui/cocoa.m fixed up]
91 lines
2.4 KiB
C
91 lines
2.4 KiB
C
/*
|
|
* Copyright (c) 2018, Impinj, Inc.
|
|
*
|
|
* i.MX2 Watchdog IP block
|
|
*
|
|
* Author: Andrey Smirnov <andrew.smirnov@gmail.com>
|
|
*
|
|
* This work is licensed under the terms of the GNU GPL, version 2 or later.
|
|
* See the COPYING file in the top-level directory.
|
|
*/
|
|
|
|
#include "qemu/osdep.h"
|
|
#include "qemu/bitops.h"
|
|
#include "qemu/module.h"
|
|
#include "sysemu/watchdog.h"
|
|
|
|
#include "hw/misc/imx2_wdt.h"
|
|
|
|
#define IMX2_WDT_WCR_WDA BIT(5) /* -> External Reset WDOG_B */
|
|
#define IMX2_WDT_WCR_SRS BIT(4) /* -> Software Reset Signal */
|
|
|
|
static uint64_t imx2_wdt_read(void *opaque, hwaddr addr,
|
|
unsigned int size)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void imx2_wdt_write(void *opaque, hwaddr addr,
|
|
uint64_t value, unsigned int size)
|
|
{
|
|
if (addr == IMX2_WDT_WCR &&
|
|
(value & (IMX2_WDT_WCR_WDA | IMX2_WDT_WCR_SRS))) {
|
|
watchdog_perform_action();
|
|
}
|
|
}
|
|
|
|
static const MemoryRegionOps imx2_wdt_ops = {
|
|
.read = imx2_wdt_read,
|
|
.write = imx2_wdt_write,
|
|
.endianness = DEVICE_NATIVE_ENDIAN,
|
|
.impl = {
|
|
/*
|
|
* Our device would not work correctly if the guest was doing
|
|
* unaligned access. This might not be a limitation on the
|
|
* real device but in practice there is no reason for a guest
|
|
* to access this device unaligned.
|
|
*/
|
|
.min_access_size = 4,
|
|
.max_access_size = 4,
|
|
.unaligned = false,
|
|
},
|
|
};
|
|
|
|
static void imx2_wdt_realize(DeviceState *dev, Error **errp)
|
|
{
|
|
IMX2WdtState *s = IMX2_WDT(dev);
|
|
|
|
memory_region_init_io(&s->mmio, OBJECT(dev),
|
|
&imx2_wdt_ops, s,
|
|
TYPE_IMX2_WDT".mmio",
|
|
IMX2_WDT_REG_NUM * sizeof(uint16_t));
|
|
sysbus_init_mmio(SYS_BUS_DEVICE(dev), &s->mmio);
|
|
}
|
|
|
|
static void imx2_wdt_class_init(ObjectClass *klass, void *data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
|
|
dc->realize = imx2_wdt_realize;
|
|
set_bit(DEVICE_CATEGORY_MISC, dc->categories);
|
|
}
|
|
|
|
static const TypeInfo imx2_wdt_info = {
|
|
.name = TYPE_IMX2_WDT,
|
|
.parent = TYPE_SYS_BUS_DEVICE,
|
|
.instance_size = sizeof(IMX2WdtState),
|
|
.class_init = imx2_wdt_class_init,
|
|
};
|
|
|
|
static WatchdogTimerModel model = {
|
|
.wdt_name = "imx2-watchdog",
|
|
.wdt_description = "i.MX2 Watchdog",
|
|
};
|
|
|
|
static void imx2_wdt_register_type(void)
|
|
{
|
|
watchdog_add_model(&model);
|
|
type_register_static(&imx2_wdt_info);
|
|
}
|
|
type_init(imx2_wdt_register_type)
|