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/*
* ACPI implementation
*
* Copyright (c) 2006 Fabrice Bellard
* Copyright (c) 2009 Isaku Yamahata <yamahata at valinux co jp>
* VA Linux Systems Japan K.K.
* Copyright (C) 2012 Jason Baron <jbaron@redhat.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>
*/
#include "qemu/osdep.h"
#include "qemu/range.h"
#include "hw/i2c/pm_smbus.h"
#include "hw/pci/pci.h"
#include "migration/vmstate.h"
#include "qemu/module.h"
#include "hw/i386/ich9.h"
#include "qom/object.h"
typedef struct ICH9SMBState ICH9SMBState;
#define ICH9_SMB_DEVICE(obj) \
OBJECT_CHECK(ICH9SMBState, (obj), TYPE_ICH9_SMB_DEVICE)
struct ICH9SMBState {
PCIDevice dev;
bool irq_enabled;
PMSMBus smb;
};
static bool ich9_vmstate_need_smbus(void *opaque, int version_id)
{
return pm_smbus_vmstate_needed();
}
static const VMStateDescription vmstate_ich9_smbus = {
.name = "ich9_smb",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_PCI_DEVICE(dev, ICH9SMBState),
VMSTATE_BOOL_TEST(irq_enabled, ICH9SMBState, ich9_vmstate_need_smbus),
VMSTATE_STRUCT_TEST(smb, ICH9SMBState, ich9_vmstate_need_smbus, 1,
pmsmb_vmstate, PMSMBus),
VMSTATE_END_OF_LIST()
}
};
static void ich9_smbus_write_config(PCIDevice *d, uint32_t address,
uint32_t val, int len)
{
ICH9SMBState *s = ICH9_SMB_DEVICE(d);
pci_default_write_config(d, address, val, len);
if (range_covers_byte(address, len, ICH9_SMB_HOSTC)) {
uint8_t hostc = s->dev.config[ICH9_SMB_HOSTC];
if (hostc & ICH9_SMB_HOSTC_HST_EN) {
memory_region_set_enabled(&s->smb.io, true);
} else {
memory_region_set_enabled(&s->smb.io, false);
}
s->smb.i2c_enable = (hostc & ICH9_SMB_HOSTC_I2C_EN) != 0;
if (hostc & ICH9_SMB_HOSTC_SSRESET) {
s->smb.reset(&s->smb);
s->dev.config[ICH9_SMB_HOSTC] &= ~ICH9_SMB_HOSTC_SSRESET;
}
}
}
static void ich9_smbus_realize(PCIDevice *d, Error **errp)
{
ICH9SMBState *s = ICH9_SMB_DEVICE(d);
/* TODO? D31IP.SMIP in chipset configuration space */
pci_config_set_interrupt_pin(d->config, 0x01); /* interrupt pin 1 */
pci_set_byte(d->config + ICH9_SMB_HOSTC, 0);
/* TODO bar0, bar1: 64bit BAR support*/
pm_smbus_init(&d->qdev, &s->smb, false);
pci_register_bar(d, ICH9_SMB_SMB_BASE_BAR, PCI_BASE_ADDRESS_SPACE_IO,
&s->smb.io);
}
static void ich9_smb_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
k->vendor_id = PCI_VENDOR_ID_INTEL;
k->device_id = PCI_DEVICE_ID_INTEL_ICH9_6;
k->revision = ICH9_A2_SMB_REVISION;
k->class_id = PCI_CLASS_SERIAL_SMBUS;
dc->vmsd = &vmstate_ich9_smbus;
dc->desc = "ICH9 SMBUS Bridge";
k->realize = ich9_smbus_realize;
k->config_write = ich9_smbus_write_config;
/*
* Reason: part of ICH9 southbridge, needs to be wired up by
* pc_q35_init()
*/
dc->user_creatable = false;
}
static void ich9_smb_set_irq(PMSMBus *pmsmb, bool enabled)
{
ICH9SMBState *s = pmsmb->opaque;
if (enabled == s->irq_enabled) {
return;
}
s->irq_enabled = enabled;
pci_set_irq(&s->dev, enabled);
}
I2CBus *ich9_smb_init(PCIBus *bus, int devfn, uint32_t smb_io_base)
{
PCIDevice *d =
pci_create_simple_multifunction(bus, devfn, true, TYPE_ICH9_SMB_DEVICE);
ICH9SMBState *s = ICH9_SMB_DEVICE(d);
s->smb.set_irq = ich9_smb_set_irq;
s->smb.opaque = s;
return s->smb.smbus;
}
static const TypeInfo ich9_smb_info = {
.name = TYPE_ICH9_SMB_DEVICE,
.parent = TYPE_PCI_DEVICE,
.instance_size = sizeof(ICH9SMBState),
.class_init = ich9_smb_class_init,
.interfaces = (InterfaceInfo[]) {
{ INTERFACE_CONVENTIONAL_PCI_DEVICE },
{ },
},
};
static void ich9_smb_register(void)
{
type_register_static(&ich9_smb_info);
}
type_init(ich9_smb_register);
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