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/*
* QEMU Intel 82374 emulation (Enhanced DMA controller)
*
* Copyright (c) 2010 Hervé Poussineau
*
* 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/isa/isa.h"
//#define DEBUG_I82374
#ifdef DEBUG_I82374
#define DPRINTF(fmt, ...) \
do { fprintf(stderr, "i82374: " fmt , ## __VA_ARGS__); } while (0)
#else
#define DPRINTF(fmt, ...) \
do {} while (0)
#endif
#define BADF(fmt, ...) \
do { fprintf(stderr, "i82374 ERROR: " fmt , ## __VA_ARGS__); } while (0)
typedef struct I82374State {
uint8_t commands[8];
qemu_irq out;
} I82374State;
static const VMStateDescription vmstate_i82374 = {
.name = "i82374",
.version_id = 0,
.minimum_version_id = 0,
.fields = (VMStateField[]) {
VMSTATE_UINT8_ARRAY(commands, I82374State, 8),
VMSTATE_END_OF_LIST()
},
};
static uint32_t i82374_read_isr(void *opaque, uint32_t nport)
{
uint32_t val = 0;
BADF("%s: %08x\n", __func__, nport);
DPRINTF("%s: %08x=%08x\n", __func__, nport, val);
return val;
}
static void i82374_write_command(void *opaque, uint32_t nport, uint32_t data)
{
DPRINTF("%s: %08x=%08x\n", __func__, nport, data);
if (data != 0x42) {
/* Not Stop S/G command */
BADF("%s: %08x=%08x\n", __func__, nport, data);
}
}
static uint32_t i82374_read_status(void *opaque, uint32_t nport)
{
uint32_t val = 0;
BADF("%s: %08x\n", __func__, nport);
DPRINTF("%s: %08x=%08x\n", __func__, nport, val);
return val;
}
static void i82374_write_descriptor(void *opaque, uint32_t nport, uint32_t data)
{
DPRINTF("%s: %08x=%08x\n", __func__, nport, data);
BADF("%s: %08x=%08x\n", __func__, nport, data);
}
static uint32_t i82374_read_descriptor(void *opaque, uint32_t nport)
{
uint32_t val = 0;
BADF("%s: %08x\n", __func__, nport);
DPRINTF("%s: %08x=%08x\n", __func__, nport, val);
return val;
}
static void i82374_realize(I82374State *s, Error **errp)
{
DMA_init(1, &s->out);
memset(s->commands, 0, sizeof(s->commands));
}
#define TYPE_I82374 "i82374"
#define I82374(obj) OBJECT_CHECK(ISAi82374State, (obj), TYPE_I82374)
typedef struct ISAi82374State {
ISADevice parent_obj;
uint32_t iobase;
I82374State state;
} ISAi82374State;
static const VMStateDescription vmstate_isa_i82374 = {
.name = "isa-i82374",
.version_id = 0,
.minimum_version_id = 0,
.fields = (VMStateField[]) {
VMSTATE_STRUCT(state, ISAi82374State, 0, vmstate_i82374, I82374State),
VMSTATE_END_OF_LIST()
},
};
static void i82374_isa_realize(DeviceState *dev, Error **errp)
{
ISAi82374State *isa = I82374(dev);
I82374State *s = &isa->state;
register_ioport_read(isa->iobase + 0x0A, 1, 1, i82374_read_isr, s);
register_ioport_write(isa->iobase + 0x10, 8, 1, i82374_write_command, s);
register_ioport_read(isa->iobase + 0x18, 8, 1, i82374_read_status, s);
register_ioport_write(isa->iobase + 0x20, 0x20, 1, i82374_write_descriptor, s);
register_ioport_read(isa->iobase + 0x20, 0x20, 1, i82374_read_descriptor, s);
i82374_realize(s, errp);
qdev_init_gpio_out(dev, &s->out, 1);
}
static Property i82374_properties[] = {
DEFINE_PROP_HEX32("iobase", ISAi82374State, iobase, 0x400),
DEFINE_PROP_END_OF_LIST()
};
static void i82374_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->realize = i82374_isa_realize;
dc->vmsd = &vmstate_isa_i82374;
dc->props = i82374_properties;
}
static const TypeInfo i82374_isa_info = {
.name = TYPE_I82374,
.parent = TYPE_ISA_DEVICE,
.instance_size = sizeof(ISAi82374State),
.class_init = i82374_class_init,
};
static void i82374_register_types(void)
{
type_register_static(&i82374_isa_info);
}
type_init(i82374_register_types)
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