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/*
* QEMU Crystal CS4231 audio chip emulation
*
* Copyright (c) 2006 Fabrice Bellard
*
* 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 "trace.h"
/*
* In addition to Crystal CS4231 there is a DMA controller on Sparc.
*/
#define CS_SIZE 0x40
#define CS_REGS 16
#define CS_DREGS 32
#define CS_MAXDREG (CS_DREGS - 1)
#define TYPE_CS4231 "SUNW,CS4231"
#define CS4231(obj) \
OBJECT_CHECK(CSState, (obj), TYPE_CS4231)
typedef struct CSState {
SysBusDevice parent_obj;
MemoryRegion iomem;
qemu_irq irq;
uint32_t regs[CS_REGS];
uint8_t dregs[CS_DREGS];
} CSState;
#define CS_RAP(s) ((s)->regs[0] & CS_MAXDREG)
#define CS_VER 0xa0
#define CS_CDC_VER 0x8a
static void cs_reset(DeviceState *d)
{
CSState *s = CS4231(d);
memset(s->regs, 0, CS_REGS * 4);
memset(s->dregs, 0, CS_DREGS);
s->dregs[12] = CS_CDC_VER;
s->dregs[25] = CS_VER;
}
static uint64_t cs_mem_read(void *opaque, hwaddr addr,
unsigned size)
{
CSState *s = opaque;
uint32_t saddr, ret;
saddr = addr >> 2;
switch (saddr) {
case 1:
switch (CS_RAP(s)) {
case 3: // Write only
ret = 0;
break;
default:
ret = s->dregs[CS_RAP(s)];
break;
}
trace_cs4231_mem_readl_dreg(CS_RAP(s), ret);
break;
default:
ret = s->regs[saddr];
trace_cs4231_mem_readl_reg(saddr, ret);
break;
}
return ret;
}
static void cs_mem_write(void *opaque, hwaddr addr,
uint64_t val, unsigned size)
{
CSState *s = opaque;
uint32_t saddr;
saddr = addr >> 2;
trace_cs4231_mem_writel_reg(saddr, s->regs[saddr], val);
switch (saddr) {
case 1:
trace_cs4231_mem_writel_dreg(CS_RAP(s), s->dregs[CS_RAP(s)], val);
switch(CS_RAP(s)) {
case 11:
case 25: // Read only
break;
case 12:
val &= 0x40;
val |= CS_CDC_VER; // Codec version
s->dregs[CS_RAP(s)] = val;
break;
default:
s->dregs[CS_RAP(s)] = val;
break;
}
break;
case 2: // Read only
break;
case 4:
if (val & 1) {
cs_reset(DEVICE(s));
}
val &= 0x7f;
s->regs[saddr] = val;
break;
default:
s->regs[saddr] = val;
break;
}
}
static const MemoryRegionOps cs_mem_ops = {
.read = cs_mem_read,
.write = cs_mem_write,
.endianness = DEVICE_NATIVE_ENDIAN,
};
static const VMStateDescription vmstate_cs4231 = {
.name ="cs4231",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT32_ARRAY(regs, CSState, CS_REGS),
VMSTATE_UINT8_ARRAY(dregs, CSState, CS_DREGS),
VMSTATE_END_OF_LIST()
}
};
static int cs4231_init1(SysBusDevice *dev)
{
CSState *s = CS4231(dev);
memory_region_init_io(&s->iomem, OBJECT(s), &cs_mem_ops, s, "cs4321",
CS_SIZE);
sysbus_init_mmio(dev, &s->iomem);
sysbus_init_irq(dev, &s->irq);
return 0;
}
static Property cs4231_properties[] = {
{.name = NULL},
};
static void cs4231_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
k->init = cs4231_init1;
dc->reset = cs_reset;
dc->vmsd = &vmstate_cs4231;
dc->props = cs4231_properties;
}
static const TypeInfo cs4231_info = {
.name = TYPE_CS4231,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(CSState),
.class_init = cs4231_class_init,
};
static void cs4231_register_types(void)
{
type_register_static(&cs4231_info);
}
type_init(cs4231_register_types)
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