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qemu/hw/ide/cmd646.c

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/*
* QEMU IDE Emulation: PCI cmd646 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.
*/
#include "qemu/osdep.h"
#include "hw/hw.h"
#include "hw/pci/pci.h"
#include "hw/isa/isa.h"
#include "sysemu/block-backend.h"
#include "sysemu/sysemu.h"
#include "sysemu/dma.h"
#include "hw/ide/pci.h"
#include "trace.h"
/* CMD646 specific */
#define CFR 0x50
#define CFR_INTR_CH0 0x04
#define CNTRL 0x51
#define CNTRL_EN_CH0 0x04
#define CNTRL_EN_CH1 0x08
#define ARTTIM23 0x57
#define ARTTIM23_INTR_CH1 0x10
#define MRDMODE 0x71
#define MRDMODE_INTR_CH0 0x04
#define MRDMODE_INTR_CH1 0x08
#define MRDMODE_BLK_CH0 0x10
#define MRDMODE_BLK_CH1 0x20
#define UDIDETCR0 0x73
#define UDIDETCR1 0x7B
static void cmd646_update_irq(PCIDevice *pd);
static uint64_t cmd646_cmd_read(void *opaque, hwaddr addr,
unsigned size)
{
CMD646BAR *cmd646bar = opaque;
if (addr != 2 || size != 1) {
return ((uint64_t)1 << (size * 8)) - 1;
}
return ide_status_read(cmd646bar->bus, addr + 2);
}
static void cmd646_cmd_write(void *opaque, hwaddr addr,
uint64_t data, unsigned size)
{
CMD646BAR *cmd646bar = opaque;
if (addr != 2 || size != 1) {
return;
}
ide_cmd_write(cmd646bar->bus, addr + 2, data);
}
static const MemoryRegionOps cmd646_cmd_ops = {
.read = cmd646_cmd_read,
.write = cmd646_cmd_write,
.endianness = DEVICE_LITTLE_ENDIAN,
};
static uint64_t cmd646_data_read(void *opaque, hwaddr addr,
unsigned size)
{
CMD646BAR *cmd646bar = opaque;
if (size == 1) {
return ide_ioport_read(cmd646bar->bus, addr);
} else if (addr == 0) {
if (size == 2) {
return ide_data_readw(cmd646bar->bus, addr);
} else {
return ide_data_readl(cmd646bar->bus, addr);
}
}
return ((uint64_t)1 << (size * 8)) - 1;
}
static void cmd646_data_write(void *opaque, hwaddr addr,
uint64_t data, unsigned size)
{
CMD646BAR *cmd646bar = opaque;
if (size == 1) {
ide_ioport_write(cmd646bar->bus, addr, data);
} else if (addr == 0) {
if (size == 2) {
ide_data_writew(cmd646bar->bus, addr, data);
} else {
ide_data_writel(cmd646bar->bus, addr, data);
}
}
}
static const MemoryRegionOps cmd646_data_ops = {
.read = cmd646_data_read,
.write = cmd646_data_write,
.endianness = DEVICE_LITTLE_ENDIAN,
};
static void setup_cmd646_bar(PCIIDEState *d, int bus_num)
{
IDEBus *bus = &d->bus[bus_num];
CMD646BAR *bar = &d->cmd646_bar[bus_num];
bar->bus = bus;
bar->pci_dev = d;
memory_region_init_io(&bar->cmd, OBJECT(d), &cmd646_cmd_ops, bar,
"cmd646-cmd", 4);
memory_region_init_io(&bar->data, OBJECT(d), &cmd646_data_ops, bar,
"cmd646-data", 8);
}
static void cmd646_update_dma_interrupts(PCIDevice *pd)
{
/* Sync DMA interrupt status from UDMA interrupt status */
if (pd->config[MRDMODE] & MRDMODE_INTR_CH0) {
pd->config[CFR] |= CFR_INTR_CH0;
} else {
pd->config[CFR] &= ~CFR_INTR_CH0;
}
if (pd->config[MRDMODE] & MRDMODE_INTR_CH1) {
pd->config[ARTTIM23] |= ARTTIM23_INTR_CH1;
} else {
pd->config[ARTTIM23] &= ~ARTTIM23_INTR_CH1;
}
}
static void cmd646_update_udma_interrupts(PCIDevice *pd)
{
/* Sync UDMA interrupt status from DMA interrupt status */
if (pd->config[CFR] & CFR_INTR_CH0) {
pd->config[MRDMODE] |= MRDMODE_INTR_CH0;
} else {
pd->config[MRDMODE] &= ~MRDMODE_INTR_CH0;
}
if (pd->config[ARTTIM23] & ARTTIM23_INTR_CH1) {
pd->config[MRDMODE] |= MRDMODE_INTR_CH1;
} else {
pd->config[MRDMODE] &= ~MRDMODE_INTR_CH1;
}
}
static uint64_t bmdma_read(void *opaque, hwaddr addr,
unsigned size)
{
BMDMAState *bm = opaque;
PCIDevice *pci_dev = PCI_DEVICE(bm->pci_dev);
uint32_t val;
if (size != 1) {
return ((uint64_t)1 << (size * 8)) - 1;
}
switch(addr & 3) {
case 0:
val = bm->cmd;
break;
case 1:
val = pci_dev->config[MRDMODE];
break;
case 2:
val = bm->status;
break;
case 3:
if (bm == &bm->pci_dev->bmdma[0]) {
val = pci_dev->config[UDIDETCR0];
} else {
val = pci_dev->config[UDIDETCR1];
}
break;
default:
val = 0xff;
break;
}
trace_bmdma_read_cmd646(addr, val);
return val;
}
static void bmdma_write(void *opaque, hwaddr addr,
uint64_t val, unsigned size)
{
BMDMAState *bm = opaque;
PCIDevice *pci_dev = PCI_DEVICE(bm->pci_dev);
if (size != 1) {
return;
}
trace_bmdma_write_cmd646(addr, val);
switch(addr & 3) {
case 0:
bmdma_cmd_writeb(bm, val);
break;
case 1:
pci_dev->config[MRDMODE] =
(pci_dev->config[MRDMODE] & ~0x30) | (val & 0x30);
cmd646_update_dma_interrupts(pci_dev);
cmd646_update_irq(pci_dev);
break;
case 2:
bm->status = (val & 0x60) | (bm->status & 1) | (bm->status & ~val & 0x06);
break;
case 3:
if (bm == &bm->pci_dev->bmdma[0]) {
pci_dev->config[UDIDETCR0] = val;
} else {
pci_dev->config[UDIDETCR1] = val;
}
break;
}
}
static const MemoryRegionOps cmd646_bmdma_ops = {
.read = bmdma_read,
.write = bmdma_write,
};
static void bmdma_setup_bar(PCIIDEState *d)
{
BMDMAState *bm;
int i;
memory_region_init(&d->bmdma_bar, OBJECT(d), "cmd646-bmdma", 16);
for(i = 0;i < 2; i++) {
bm = &d->bmdma[i];
memory_region_init_io(&bm->extra_io, OBJECT(d), &cmd646_bmdma_ops, bm,
"cmd646-bmdma-bus", 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,
"cmd646-bmdma-ioport", 4);
memory_region_add_subregion(&d->bmdma_bar, i * 8 + 4, &bm->addr_ioport);
}
}
static void cmd646_update_irq(PCIDevice *pd)
{
int pci_level;
pci_level = ((pd->config[MRDMODE] & MRDMODE_INTR_CH0) &&
!(pd->config[MRDMODE] & MRDMODE_BLK_CH0)) ||
((pd->config[MRDMODE] & MRDMODE_INTR_CH1) &&
!(pd->config[MRDMODE] & MRDMODE_BLK_CH1));
pci_set_irq(pd, pci_level);
}
/* the PCI irq level is the logical OR of the two channels */
static void cmd646_set_irq(void *opaque, int channel, int level)
{
PCIIDEState *d = opaque;
PCIDevice *pd = PCI_DEVICE(d);
int irq_mask;
irq_mask = MRDMODE_INTR_CH0 << channel;
if (level) {
pd->config[MRDMODE] |= irq_mask;
} else {
pd->config[MRDMODE] &= ~irq_mask;
}
cmd646_update_dma_interrupts(pd);
cmd646_update_irq(pd);
}
static void cmd646_reset(void *opaque)
{
PCIIDEState *d = opaque;
unsigned int i;
for (i = 0; i < 2; i++) {
ide_bus_reset(&d->bus[i]);
}
}
static uint32_t cmd646_pci_config_read(PCIDevice *d,
uint32_t address, int len)
{
return pci_default_read_config(d, address, len);
}
static void cmd646_pci_config_write(PCIDevice *d, uint32_t addr, uint32_t val,
int l)
{
uint32_t i;
pci_default_write_config(d, addr, val, l);
for (i = addr; i < addr + l; i++) {
switch (i) {
case CFR:
case ARTTIM23:
cmd646_update_udma_interrupts(d);
break;
case MRDMODE:
cmd646_update_dma_interrupts(d);
break;
}
}
cmd646_update_irq(d);
}
/* CMD646 PCI IDE controller */
static void pci_cmd646_ide_realize(PCIDevice *dev, Error **errp)
{
PCIIDEState *d = PCI_IDE(dev);
uint8_t *pci_conf = dev->config;
qemu_irq *irq;
int i;
pci_conf[PCI_CLASS_PROG] = 0x8f;
pci_conf[CNTRL] = CNTRL_EN_CH0; // enable IDE0
if (d->secondary) {
/* XXX: if not enabled, really disable the seconday IDE controller */
pci_conf[CNTRL] |= CNTRL_EN_CH1; /* enable IDE1 */
}
/* Set write-to-clear interrupt bits */
dev->wmask[CFR] = 0x0;
dev->w1cmask[CFR] = CFR_INTR_CH0;
dev->wmask[ARTTIM23] = 0x0;
dev->w1cmask[ARTTIM23] = ARTTIM23_INTR_CH1;
dev->wmask[MRDMODE] = 0x0;
dev->w1cmask[MRDMODE] = MRDMODE_INTR_CH0 | MRDMODE_INTR_CH1;
setup_cmd646_bar(d, 0);
setup_cmd646_bar(d, 1);
pci_register_bar(dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &d->cmd646_bar[0].data);
pci_register_bar(dev, 1, PCI_BASE_ADDRESS_SPACE_IO, &d->cmd646_bar[0].cmd);
pci_register_bar(dev, 2, PCI_BASE_ADDRESS_SPACE_IO, &d->cmd646_bar[1].data);
pci_register_bar(dev, 3, PCI_BASE_ADDRESS_SPACE_IO, &d->cmd646_bar[1].cmd);
bmdma_setup_bar(d);
pci_register_bar(dev, 4, PCI_BASE_ADDRESS_SPACE_IO, &d->bmdma_bar);
/* TODO: RST# value should be 0 */
pci_conf[PCI_INTERRUPT_PIN] = 0x01; // interrupt on pin 1
irq = qemu_allocate_irqs(cmd646_set_irq, d, 2);
for (i = 0; i < 2; i++) {
ide_bus_new(&d->bus[i], sizeof(d->bus[i]), DEVICE(dev), i, 2);
ide_init2(&d->bus[i], irq[i]);
bmdma_init(&d->bus[i], &d->bmdma[i], d);
d->bmdma[i].bus = &d->bus[i];
ide_register_restart_cb(&d->bus[i]);
}
vmstate_register(DEVICE(dev), 0, &vmstate_ide_pci, d);
qemu_register_reset(cmd646_reset, d);
}
static void pci_cmd646_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);
}
}
void pci_cmd646_ide_init(PCIBus *bus, DriveInfo **hd_table,
int secondary_ide_enabled)
{
PCIDevice *dev;
dev = pci_create(bus, -1, "cmd646-ide");
qdev_prop_set_uint32(&dev->qdev, "secondary", secondary_ide_enabled);
qdev_init_nofail(&dev->qdev);
pci_ide_create_devs(dev, hd_table);
}
static Property cmd646_ide_properties[] = {
DEFINE_PROP_UINT32("secondary", PCIIDEState, secondary, 0),
DEFINE_PROP_END_OF_LIST(),
};
static void cmd646_ide_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
k->realize = pci_cmd646_ide_realize;
k->exit = pci_cmd646_ide_exitfn;
k->vendor_id = PCI_VENDOR_ID_CMD;
k->device_id = PCI_DEVICE_ID_CMD_646;
k->revision = 0x07;
k->class_id = PCI_CLASS_STORAGE_IDE;
k->config_read = cmd646_pci_config_read;
k->config_write = cmd646_pci_config_write;
dc->props = cmd646_ide_properties;
set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
}
static const TypeInfo cmd646_ide_info = {
.name = "cmd646-ide",
.parent = TYPE_PCI_IDE,
.class_init = cmd646_ide_class_init,
};
static void cmd646_ide_register_types(void)
{
type_register_static(&cmd646_ide_info);
}
type_init(cmd646_ide_register_types)
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