/*
* QEMU IDE Emulation: PCI PIIX3/4 support.
*
* Copyright (c) 2003 Fabrice Bellard
* Copyright (c) 2006 Openedhand Ltd.
*
* 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.
*
* References:
* [1] 82371FB (PIIX) AND 82371SB (PIIX3) PCI ISA IDE XCELERATOR,
* 290550-002, Intel Corporation, April 1997.
*/
#include "qemu/osdep.h"
#include "hw/pci/pci.h"
#include "migration/vmstate.h"
#include "qapi/error.h"
#include "qemu/module.h"
#include "sysemu/block-backend.h"
#include "sysemu/blockdev.h"
#include "sysemu/dma.h"
#include "hw/ide/piix.h"
#include "hw/ide/pci.h"
#include "trace.h"
static uint64_t bmdma_read(void *opaque, hwaddr addr, unsigned size)
{
BMDMAState *bm = opaque;
uint32_t val;
if (size != 1) {
return ((uint64_t)1 << (size * 8)) - 1;
}
switch(addr & 3) {
case 0:
val = bm->cmd;
break;
case 2:
val = bm->status;
break;
default:
val = 0xff;
break;
}
trace_bmdma_read(addr, val);
return val;
}
static void bmdma_write(void *opaque, hwaddr addr,
uint64_t val, unsigned size)
{
BMDMAState *bm = opaque;
if (size != 1) {
return;
}
trace_bmdma_write(addr, val);
switch(addr & 3) {
case 0:
bmdma_cmd_writeb(bm, val);
break;
case 2:
bm->status = (val & 0x60) | (bm->status & 1) | (bm->status & ~val & 0x06);
break;
}
}
static const MemoryRegionOps piix_bmdma_ops = {
.read = bmdma_read,
.write = bmdma_write,
};
static void bmdma_setup_bar(PCIIDEState *d)
{
int i;
memory_region_init(&d->bmdma_bar, OBJECT(d), "piix-bmdma-container", 16);
for(i = 0;i < 2; i++) {
BMDMAState *bm = &d->bmdma[i];
memory_region_init_io(&bm->extra_io, OBJECT(d), &piix_bmdma_ops, bm,
"piix-bmdma", 4);
memory_region_add_subregion(&d->bmdma_bar, i * 8, &bm->extra_io);
memory_region_init_io(&bm->addr_ioport, OBJECT(d),
&bmdma_addr_ioport_ops, bm, "bmdma", 4);
memory_region_add_subregion(&d->bmdma_bar, i * 8 + 4, &bm->addr_ioport);
}
}
static void piix_ide_reset(DeviceState *dev)
{
PCIIDEState *d = PCI_IDE(dev);
PCIDevice *pd = PCI_DEVICE(d);
uint8_t *pci_conf = pd->config;
int i;
for (i = 0; i < 2; i++) {
ide_bus_reset(&d->bus[i]);
}
/* PCI command register default value (0000h) per [1, p.48]. */
pci_set_word(pci_conf + PCI_COMMAND, 0x0000);
pci_set_word(pci_conf + PCI_STATUS,
PCI_STATUS_DEVSEL_MEDIUM | PCI_STATUS_FAST_BACK);
pci_set_byte(pci_conf + 0x20, 0x01); /* BMIBA: 20-23h */
}
static int pci_piix_init_ports(PCIIDEState *d)
{
static const struct {
int iobase;
int iobase2;
int isairq;
} port_info[] = {
{0x1f0, 0x3f6, 14},
{0x170, 0x376, 15},
};
int i, ret;
for (i = 0; i < 2; i++) {
ide_bus_init(&d->bus[i], sizeof(d->bus[i]), DEVICE(d), i, 2);
ret = ide_init_ioport(&d->bus[i], NULL, port_info[i].iobase,
port_info[i].iobase2);
if (ret) {
return ret;
}
ide_init2(&d->bus[i], isa_get_irq(NULL, port_info[i].isairq));
bmdma_init(&d->bus[i], &d->bmdma[i], d);
d->bmdma[i].bus = &d->bus[i];
ide_register_restart_cb(&d->bus[i]);
}
return 0;
}
static void pci_piix_ide_realize(PCIDevice *dev, Error **errp)
{
PCIIDEState *d = PCI_IDE(dev);
uint8_t *pci_conf = dev->config;
int rc;
pci_conf[PCI_CLASS_PROG] = 0x80; // legacy ATA mode
bmdma_setup_bar(d);
pci_register_bar(dev, 4, PCI_BASE_ADDRESS_SPACE_IO, &d->bmdma_bar);
vmstate_register(VMSTATE_IF(dev), 0, &vmstate_ide_pci, d);
rc = pci_piix_init_ports(d);
if (rc) {
error_setg_errno(errp, -rc, "Failed to realize %s",
object_get_typename(OBJECT(dev)));
}
}
static void pci_piix_ide_exitfn(PCIDevice *dev)
{
PCIIDEState *d = PCI_IDE(dev);
unsigned i;
for (i = 0; i < 2; ++i) {
memory_region_del_subregion(&d->bmdma_bar, &d->bmdma[i].extra_io);
memory_region_del_subregion(&d->bmdma_bar, &d->bmdma[i].addr_ioport);
}
}
/* NOTE: for the PIIX3, the IRQs and IOports are hardcoded */
static void piix3_ide_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
dc->reset = piix_ide_reset;
k->realize = pci_piix_ide_realize;
k->exit = pci_piix_ide_exitfn;
k->vendor_id = PCI_VENDOR_ID_INTEL;
k->device_id = PCI_DEVICE_ID_INTEL_82371SB_1;
k->class_id = PCI_CLASS_STORAGE_IDE;
set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
dc->hotpluggable = false;
}
static const TypeInfo piix3_ide_info = {
.name = TYPE_PIIX3_IDE,
.parent = TYPE_PCI_IDE,
.class_init = piix3_ide_class_init,
};
/* NOTE: for the PIIX4, the IRQs and IOports are hardcoded */
static void piix4_ide_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
dc->reset = piix_ide_reset;
k->realize = pci_piix_ide_realize;
k->exit = pci_piix_ide_exitfn;
k->vendor_id = PCI_VENDOR_ID_INTEL;
k->device_id = PCI_DEVICE_ID_INTEL_82371AB;
k->class_id = PCI_CLASS_STORAGE_IDE;
set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
dc->hotpluggable = false;
}
static const TypeInfo piix4_ide_info = {
.name = TYPE_PIIX4_IDE,
.parent = TYPE_PCI_IDE,
.class_init = piix4_ide_class_init,
};
static void piix_ide_register_types(void)
{
type_register_static(&piix3_ide_info);
type_register_static(&piix4_ide_info);
}
type_init(piix_ide_register_types)
