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/*
* QEMU Intel i82378 emulation (PCI to ISA bridge)
*
* Copyright (c) 2010-2011 Hervé Poussineau
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "hw/pci/pci_device.h"
#include "hw/irq.h"
#include "hw/intc/i8259.h"
#include "hw/timer/i8254.h"
#include "migration/vmstate.h"
#include "hw/audio/pcspk.h"
#include "qom/object.h"
#define TYPE_I82378 "i82378"
OBJECT_DECLARE_SIMPLE_TYPE(I82378State, I82378)
struct I82378State {
PCIDevice parent_obj;
qemu_irq cpu_intr;
qemu_irq *isa_irqs_in;
};
static const VMStateDescription vmstate_i82378 = {
.name = "pci-i82378",
.version_id = 0,
.minimum_version_id = 0,
.fields = (const VMStateField[]) {
VMSTATE_PCI_DEVICE(parent_obj, I82378State),
VMSTATE_END_OF_LIST()
},
};
static void i82378_request_out0_irq(void *opaque, int irq, int level)
{
I82378State *s = opaque;
qemu_set_irq(s->cpu_intr, level);
}
static void i82378_request_pic_irq(void *opaque, int irq, int level)
{
DeviceState *dev = opaque;
I82378State *s = I82378(dev);
qemu_set_irq(s->isa_irqs_in[irq], level);
}
static void i82378_realize(PCIDevice *pci, Error **errp)
{
DeviceState *dev = DEVICE(pci);
I82378State *s = I82378(dev);
uint8_t *pci_conf;
ISABus *isabus;
ISADevice *pit;
ISADevice *pcspk;
pci_conf = pci->config;
pci_set_word(pci_conf + PCI_COMMAND,
PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
pci_set_word(pci_conf + PCI_STATUS,
PCI_STATUS_DEVSEL_MEDIUM);
pci_config_set_interrupt_pin(pci_conf, 1); /* interrupt pin 0 */
isabus = isa_bus_new(dev, get_system_memory(),
pci_address_space_io(pci), errp);
if (!isabus) {
return;
}
/* This device has:
2 82C59 (irq)
1 82C54 (pit)
2 82C37 (dma)
NMI
Utility Bus Support Registers
All devices accept byte access only, except timer
*/
/* 2 82C59 (irq) */
s->isa_irqs_in = i8259_init(isabus,
qemu_allocate_irq(i82378_request_out0_irq,
s, 0));
isa_bus_register_input_irqs(isabus, s->isa_irqs_in);
/* 1 82C54 (pit) */
pit = i8254_pit_init(isabus, 0x40, 0, NULL);
/* speaker */
pcspk = isa_new(TYPE_PC_SPEAKER);
object_property_set_link(OBJECT(pcspk), "pit", OBJECT(pit), &error_fatal);
if (!isa_realize_and_unref(pcspk, isabus, errp)) {
return;
}
/* 2 82C37 (dma) */
isa_create_simple(isabus, "i82374");
}
static void i82378_init(Object *obj)
{
DeviceState *dev = DEVICE(obj);
I82378State *s = I82378(obj);
qdev_init_gpio_out(dev, &s->cpu_intr, 1);
qdev_init_gpio_in(dev, i82378_request_pic_irq, 16);
}
static void i82378_class_init(ObjectClass *klass, void *data)
{
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
DeviceClass *dc = DEVICE_CLASS(klass);
k->realize = i82378_realize;
k->vendor_id = PCI_VENDOR_ID_INTEL;
k->device_id = PCI_DEVICE_ID_INTEL_82378;
k->revision = 0x03;
k->class_id = PCI_CLASS_BRIDGE_ISA;
dc->vmsd = &vmstate_i82378;
set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
}
static const TypeInfo i82378_type_info = {
.name = TYPE_I82378,
.parent = TYPE_PCI_DEVICE,
.instance_size = sizeof(I82378State),
.instance_init = i82378_init,
.class_init = i82378_class_init,
.interfaces = (InterfaceInfo[]) {
{ INTERFACE_CONVENTIONAL_PCI_DEVICE },
{ },
},
};
static void i82378_register_types(void)
{
type_register_static(&i82378_type_info);
}
type_init(i82378_register_types)
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