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/*
* QEMU IOSB emulation
*
* Copyright (c) 2019 Laurent Vivier
* Copyright (c) 2022 Mark Cave-Ayland
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "qemu/osdep.h"
#include "qemu/log.h"
#include "migration/vmstate.h"
#include "hw/sysbus.h"
#include "hw/misc/iosb.h"
#include "trace.h"
#define IOSB_SIZE 0x2000
#define IOSB_CONFIG 0x0
#define IOSB_CONFIG2 0x100
#define IOSB_SONIC_SCSI 0x200
#define IOSB_REVISION 0x300
#define IOSB_SCSI_RESID 0x400
#define IOSB_BRIGHTNESS 0x500
#define IOSB_TIMEOUT 0x600
static uint64_t iosb_read(void *opaque, hwaddr addr,
unsigned size)
{
IOSBState *s = IOSB(opaque);
uint64_t val = 0;
switch (addr) {
case IOSB_CONFIG:
case IOSB_CONFIG2:
case IOSB_SONIC_SCSI:
case IOSB_REVISION:
case IOSB_SCSI_RESID:
case IOSB_BRIGHTNESS:
case IOSB_TIMEOUT:
val = s->regs[addr >> 8];
break;
default:
qemu_log_mask(LOG_UNIMP, "IOSB: unimplemented read addr=0x%"PRIx64
" val=0x%"PRIx64 " size=%d\n",
addr, val, size);
}
trace_iosb_read(addr, val, size);
return val;
}
static void iosb_write(void *opaque, hwaddr addr, uint64_t val,
unsigned size)
{
IOSBState *s = IOSB(opaque);
switch (addr) {
case IOSB_CONFIG:
case IOSB_CONFIG2:
case IOSB_SONIC_SCSI:
case IOSB_REVISION:
case IOSB_SCSI_RESID:
case IOSB_BRIGHTNESS:
case IOSB_TIMEOUT:
s->regs[addr >> 8] = val;
break;
default:
qemu_log_mask(LOG_UNIMP, "IOSB: unimplemented write addr=0x%"PRIx64
" val=0x%"PRIx64 " size=%d\n",
addr, val, size);
}
trace_iosb_write(addr, val, size);
}
static const MemoryRegionOps iosb_mmio_ops = {
.read = iosb_read,
.write = iosb_write,
.endianness = DEVICE_BIG_ENDIAN,
};
static void iosb_reset_hold(Object *obj)
{
IOSBState *s = IOSB(obj);
memset(s->regs, 0, sizeof(s->regs));
/* BCLK 33 MHz */
s->regs[IOSB_CONFIG >> 8] = 1;
}
static void iosb_init(Object *obj)
{
IOSBState *s = IOSB(obj);
SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
memory_region_init_io(&s->mem_regs, obj, &iosb_mmio_ops, s, "IOSB",
IOSB_SIZE);
sysbus_init_mmio(sbd, &s->mem_regs);
}
static const VMStateDescription vmstate_iosb = {
.name = "IOSB",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT32_ARRAY(regs, IOSBState, IOSB_REGS),
VMSTATE_END_OF_LIST()
}
};
static void iosb_class_init(ObjectClass *oc, void *data)
{
DeviceClass *dc = DEVICE_CLASS(oc);
ResettableClass *rc = RESETTABLE_CLASS(oc);
dc->vmsd = &vmstate_iosb;
rc->phases.hold = iosb_reset_hold;
}
static const TypeInfo iosb_info_types[] = {
{
.name = TYPE_IOSB,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(IOSBState),
.instance_init = iosb_init,
.class_init = iosb_class_init,
},
};
DEFINE_TYPES(iosb_info_types)
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