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efec3dd631
qemu-e2k/hw/isa/vt82c686.c
Markus Armbruster efec3dd631 qdev: Replace no_user by cannot_instantiate_with_device_add_yet 
In an ideal world, machines can be built by wiring devices together
with configuration, not code.  Unfortunately, that's not the world we
live in right now.  We still have quite a few devices that need to be
wired up by code.  If you try to device_add such a device, it'll fail
in sometimes mysterious ways.  If you're lucky, you get an
unmysterious immediate crash.

To protect users from such badness, DeviceClass member no_user used to
make device models unavailable with -device / device_add, but that
regressed in commit 18b6dad.  The device model is still omitted from
help, but is available anyway.

Attempts to fix the regression have been rejected with the argument
that the purpose of no_user isn't clear, and it's prone to misuse.

This commit clarifies no_user's purpose.  Anthony suggested to rename
it cannot_instantiate_with_device_add_yet_due_to_internal_bugs, which
I shorten somewhat to keep checkpatch happy.  While there, make it
bool.

Every use of cannot_instantiate_with_device_add_yet gets a FIXME
comment asking for rationale.  The next few commits will clean them
all up, either by providing a rationale, or by getting rid of the use.

With that done, the regression fix is hopefully acceptable.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Marcel Apfelbaum <marcel.a@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
2013-12-23 00:27:22 +01:00

503 lines
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/*
* VT82C686B south bridge support
*
* Copyright (c) 2008 yajin (yajin@vm-kernel.org)
* Copyright (c) 2009 chenming (chenming@rdc.faw.com.cn)
* Copyright (c) 2010 Huacai Chen (zltjiangshi@gmail.com)
* This code is licensed under the GNU GPL v2.
*
* Contributions after 2012-01-13 are licensed under the terms of the
* GNU GPL, version 2 or (at your option) any later version.
*/
#include "hw/hw.h"
#include "hw/i386/pc.h"
#include "hw/isa/vt82c686.h"
#include "hw/i2c/i2c.h"
#include "hw/i2c/smbus.h"
#include "hw/pci/pci.h"
#include "hw/isa/isa.h"
#include "hw/sysbus.h"
#include "hw/mips/mips.h"
#include "hw/isa/apm.h"
#include "hw/acpi/acpi.h"
#include "hw/i2c/pm_smbus.h"
#include "sysemu/sysemu.h"
#include "qemu/timer.h"
#include "exec/address-spaces.h"
//#define DEBUG_VT82C686B
#ifdef DEBUG_VT82C686B
#define DPRINTF(fmt, ...) fprintf(stderr, "%s: " fmt, __FUNCTION__, ##__VA_ARGS__)
#else
#define DPRINTF(fmt, ...)
#endif
typedef struct SuperIOConfig
{
uint8_t config[0xff];
uint8_t index;
uint8_t data;
} SuperIOConfig;
typedef struct VT82C686BState {
PCIDevice dev;
MemoryRegion superio;
SuperIOConfig superio_conf;
} VT82C686BState;
static void superio_ioport_writeb(void *opaque, hwaddr addr, uint64_t data,
unsigned size)
{
int can_write;
SuperIOConfig *superio_conf = opaque;
DPRINTF("superio_ioport_writeb address 0x%x val 0x%x\n", addr, data);
if (addr == 0x3f0) {
superio_conf->index = data & 0xff;
} else {
/* 0x3f1 */
switch (superio_conf->index) {
case 0x00 ... 0xdf:
case 0xe4:
case 0xe5:
case 0xe9 ... 0xed:
case 0xf3:
case 0xf5:
case 0xf7:
case 0xf9 ... 0xfb:
case 0xfd ... 0xff:
can_write = 0;
break;
default:
can_write = 1;
if (can_write) {
switch (superio_conf->index) {
case 0xe7:
if ((data & 0xff) != 0xfe) {
DPRINTF("chage uart 1 base. unsupported yet\n");
}
break;
case 0xe8:
if ((data & 0xff) != 0xbe) {
DPRINTF("chage uart 2 base. unsupported yet\n");
}
break;
default:
superio_conf->config[superio_conf->index] = data & 0xff;
}
}
}
superio_conf->config[superio_conf->index] = data & 0xff;
}
}
static uint64_t superio_ioport_readb(void *opaque, hwaddr addr, unsigned size)
{
SuperIOConfig *superio_conf = opaque;
DPRINTF("superio_ioport_readb address 0x%x\n", addr);
return (superio_conf->config[superio_conf->index]);
}
static const MemoryRegionOps superio_ops = {
.read = superio_ioport_readb,
.write = superio_ioport_writeb,
.endianness = DEVICE_NATIVE_ENDIAN,
.impl = {
.min_access_size = 1,
.max_access_size = 1,
},
};
static void vt82c686b_reset(void * opaque)
{
PCIDevice *d = opaque;
uint8_t *pci_conf = d->config;
VT82C686BState *vt82c = DO_UPCAST(VT82C686BState, dev, d);
pci_set_long(pci_conf + PCI_CAPABILITY_LIST, 0x000000c0);
pci_set_word(pci_conf + PCI_COMMAND, PCI_COMMAND_IO | PCI_COMMAND_MEMORY |
PCI_COMMAND_MASTER | PCI_COMMAND_SPECIAL);
pci_set_word(pci_conf + PCI_STATUS, PCI_STATUS_DEVSEL_MEDIUM);
pci_conf[0x48] = 0x01; /* Miscellaneous Control 3 */
pci_conf[0x4a] = 0x04; /* IDE interrupt Routing */
pci_conf[0x4f] = 0x03; /* DMA/Master Mem Access Control 3 */
pci_conf[0x50] = 0x2d; /* PnP DMA Request Control */
pci_conf[0x59] = 0x04;
pci_conf[0x5a] = 0x04; /* KBC/RTC Control*/
pci_conf[0x5f] = 0x04;
pci_conf[0x77] = 0x10; /* GPIO Control 1/2/3/4 */
vt82c->superio_conf.config[0xe0] = 0x3c;
vt82c->superio_conf.config[0xe2] = 0x03;
vt82c->superio_conf.config[0xe3] = 0xfc;
vt82c->superio_conf.config[0xe6] = 0xde;
vt82c->superio_conf.config[0xe7] = 0xfe;
vt82c->superio_conf.config[0xe8] = 0xbe;
}
/* write config pci function0 registers. PCI-ISA bridge */
static void vt82c686b_write_config(PCIDevice * d, uint32_t address,
uint32_t val, int len)
{
VT82C686BState *vt686 = DO_UPCAST(VT82C686BState, dev, d);
DPRINTF("vt82c686b_write_config address 0x%x val 0x%x len 0x%x\n",
address, val, len);
pci_default_write_config(d, address, val, len);
if (address == 0x85) { /* enable or disable super IO configure */
memory_region_set_enabled(&vt686->superio, val & 0x2);
}
}
#define ACPI_DBG_IO_ADDR 0xb044
typedef struct VT686PMState {
PCIDevice dev;
MemoryRegion io;
ACPIREGS ar;
APMState apm;
PMSMBus smb;
uint32_t smb_io_base;
} VT686PMState;
typedef struct VT686AC97State {
PCIDevice dev;
} VT686AC97State;
typedef struct VT686MC97State {
PCIDevice dev;
} VT686MC97State;
static void pm_update_sci(VT686PMState *s)
{
int sci_level, pmsts;
pmsts = acpi_pm1_evt_get_sts(&s->ar);
sci_level = (((pmsts & s->ar.pm1.evt.en) &
(ACPI_BITMASK_RT_CLOCK_ENABLE |
ACPI_BITMASK_POWER_BUTTON_ENABLE |
ACPI_BITMASK_GLOBAL_LOCK_ENABLE |
ACPI_BITMASK_TIMER_ENABLE)) != 0);
pci_set_irq(&s->dev, sci_level);
/* schedule a timer interruption if needed */
acpi_pm_tmr_update(&s->ar, (s->ar.pm1.evt.en & ACPI_BITMASK_TIMER_ENABLE) &&
!(pmsts & ACPI_BITMASK_TIMER_STATUS));
}
static void pm_tmr_timer(ACPIREGS *ar)
{
VT686PMState *s = container_of(ar, VT686PMState, ar);
pm_update_sci(s);
}
static void pm_io_space_update(VT686PMState *s)
{
uint32_t pm_io_base;
pm_io_base = pci_get_long(s->dev.config + 0x40);
pm_io_base &= 0xffc0;
memory_region_transaction_begin();
memory_region_set_enabled(&s->io, s->dev.config[0x80] & 1);
memory_region_set_address(&s->io, pm_io_base);
memory_region_transaction_commit();
}
static void pm_write_config(PCIDevice *d,
uint32_t address, uint32_t val, int len)
{
DPRINTF("pm_write_config address 0x%x val 0x%x len 0x%x\n",
address, val, len);
pci_default_write_config(d, address, val, len);
}
static int vmstate_acpi_post_load(void *opaque, int version_id)
{
VT686PMState *s = opaque;
pm_io_space_update(s);
return 0;
}
static const VMStateDescription vmstate_acpi = {
.name = "vt82c686b_pm",
.version_id = 1,
.minimum_version_id = 1,
.minimum_version_id_old = 1,
.post_load = vmstate_acpi_post_load,
.fields = (VMStateField []) {
VMSTATE_PCI_DEVICE(dev, VT686PMState),
VMSTATE_UINT16(ar.pm1.evt.sts, VT686PMState),
VMSTATE_UINT16(ar.pm1.evt.en, VT686PMState),
VMSTATE_UINT16(ar.pm1.cnt.cnt, VT686PMState),
VMSTATE_STRUCT(apm, VT686PMState, 0, vmstate_apm, APMState),
VMSTATE_TIMER(ar.tmr.timer, VT686PMState),
VMSTATE_INT64(ar.tmr.overflow_time, VT686PMState),
VMSTATE_END_OF_LIST()
}
};
/*
* TODO: vt82c686b_ac97_init() and vt82c686b_mc97_init()
* just register a PCI device now, functionalities will be implemented later.
*/
static int vt82c686b_ac97_initfn(PCIDevice *dev)
{
VT686AC97State *s = DO_UPCAST(VT686AC97State, dev, dev);
uint8_t *pci_conf = s->dev.config;
pci_set_word(pci_conf + PCI_COMMAND, PCI_COMMAND_INVALIDATE |
PCI_COMMAND_PARITY);
pci_set_word(pci_conf + PCI_STATUS, PCI_STATUS_CAP_LIST |
PCI_STATUS_DEVSEL_MEDIUM);
pci_set_long(pci_conf + PCI_INTERRUPT_PIN, 0x03);
return 0;
}
void vt82c686b_ac97_init(PCIBus *bus, int devfn)
{
PCIDevice *dev;
dev = pci_create(bus, devfn, "VT82C686B_AC97");
qdev_init_nofail(&dev->qdev);
}
static void via_ac97_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
k->init = vt82c686b_ac97_initfn;
k->vendor_id = PCI_VENDOR_ID_VIA;
k->device_id = PCI_DEVICE_ID_VIA_AC97;
k->revision = 0x50;
k->class_id = PCI_CLASS_MULTIMEDIA_AUDIO;
set_bit(DEVICE_CATEGORY_SOUND, dc->categories);
dc->desc = "AC97";
}
static const TypeInfo via_ac97_info = {
.name = "VT82C686B_AC97",
.parent = TYPE_PCI_DEVICE,
.instance_size = sizeof(VT686AC97State),
.class_init = via_ac97_class_init,
};
static int vt82c686b_mc97_initfn(PCIDevice *dev)
{
VT686MC97State *s = DO_UPCAST(VT686MC97State, dev, dev);
uint8_t *pci_conf = s->dev.config;
pci_set_word(pci_conf + PCI_COMMAND, PCI_COMMAND_INVALIDATE |
PCI_COMMAND_VGA_PALETTE);
pci_set_word(pci_conf + PCI_STATUS, PCI_STATUS_DEVSEL_MEDIUM);
pci_set_long(pci_conf + PCI_INTERRUPT_PIN, 0x03);
return 0;
}
void vt82c686b_mc97_init(PCIBus *bus, int devfn)
{
PCIDevice *dev;
dev = pci_create(bus, devfn, "VT82C686B_MC97");
qdev_init_nofail(&dev->qdev);
}
static void via_mc97_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
k->init = vt82c686b_mc97_initfn;
k->vendor_id = PCI_VENDOR_ID_VIA;
k->device_id = PCI_DEVICE_ID_VIA_MC97;
k->class_id = PCI_CLASS_COMMUNICATION_OTHER;
k->revision = 0x30;
set_bit(DEVICE_CATEGORY_NETWORK, dc->categories);
dc->desc = "MC97";
}
static const TypeInfo via_mc97_info = {
.name = "VT82C686B_MC97",
.parent = TYPE_PCI_DEVICE,
.instance_size = sizeof(VT686MC97State),
.class_init = via_mc97_class_init,
};
/* vt82c686 pm init */
static int vt82c686b_pm_initfn(PCIDevice *dev)
{
VT686PMState *s = DO_UPCAST(VT686PMState, dev, dev);
uint8_t *pci_conf;
pci_conf = s->dev.config;
pci_set_word(pci_conf + PCI_COMMAND, 0);
pci_set_word(pci_conf + PCI_STATUS, PCI_STATUS_FAST_BACK |
PCI_STATUS_DEVSEL_MEDIUM);
/* 0x48-0x4B is Power Management I/O Base */
pci_set_long(pci_conf + 0x48, 0x00000001);
/* SMB ports:0xeee0~0xeeef */
s->smb_io_base =((s->smb_io_base & 0xfff0) + 0x0);
pci_conf[0x90] = s->smb_io_base | 1;
pci_conf[0x91] = s->smb_io_base >> 8;
pci_conf[0xd2] = 0x90;
pm_smbus_init(&s->dev.qdev, &s->smb);
memory_region_add_subregion(get_system_io(), s->smb_io_base, &s->smb.io);
apm_init(dev, &s->apm, NULL, s);
memory_region_init(&s->io, OBJECT(dev), "vt82c686-pm", 64);
memory_region_set_enabled(&s->io, false);
memory_region_add_subregion(get_system_io(), 0, &s->io);
acpi_pm_tmr_init(&s->ar, pm_tmr_timer, &s->io);
acpi_pm1_evt_init(&s->ar, pm_tmr_timer, &s->io);
acpi_pm1_cnt_init(&s->ar, &s->io, 2);
return 0;
}
i2c_bus *vt82c686b_pm_init(PCIBus *bus, int devfn, uint32_t smb_io_base,
qemu_irq sci_irq)
{
PCIDevice *dev;
VT686PMState *s;
dev = pci_create(bus, devfn, "VT82C686B_PM");
qdev_prop_set_uint32(&dev->qdev, "smb_io_base", smb_io_base);
s = DO_UPCAST(VT686PMState, dev, dev);
qdev_init_nofail(&dev->qdev);
return s->smb.smbus;
}
static Property via_pm_properties[] = {
DEFINE_PROP_UINT32("smb_io_base", VT686PMState, smb_io_base, 0),
DEFINE_PROP_END_OF_LIST(),
};
static void via_pm_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
k->init = vt82c686b_pm_initfn;
k->config_write = pm_write_config;
k->vendor_id = PCI_VENDOR_ID_VIA;
k->device_id = PCI_DEVICE_ID_VIA_ACPI;
k->class_id = PCI_CLASS_BRIDGE_OTHER;
k->revision = 0x40;
dc->desc = "PM";
dc->vmsd = &vmstate_acpi;
set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
dc->props = via_pm_properties;
}
static const TypeInfo via_pm_info = {
.name = "VT82C686B_PM",
.parent = TYPE_PCI_DEVICE,
.instance_size = sizeof(VT686PMState),
.class_init = via_pm_class_init,
};
static const VMStateDescription vmstate_via = {
.name = "vt82c686b",
.version_id = 1,
.minimum_version_id = 1,
.minimum_version_id_old = 1,
.fields = (VMStateField []) {
VMSTATE_PCI_DEVICE(dev, VT82C686BState),
VMSTATE_END_OF_LIST()
}
};
/* init the PCI-to-ISA bridge */
static int vt82c686b_initfn(PCIDevice *d)
{
VT82C686BState *vt82c = DO_UPCAST(VT82C686BState, dev, d);
uint8_t *pci_conf;
ISABus *isa_bus;
uint8_t *wmask;
int i;
isa_bus = isa_bus_new(&d->qdev, pci_address_space_io(d));
pci_conf = d->config;
pci_config_set_prog_interface(pci_conf, 0x0);
wmask = d->wmask;
for (i = 0x00; i < 0xff; i++) {
if (i<=0x03 || (i>=0x08 && i<=0x3f)) {
wmask[i] = 0x00;
}
}
memory_region_init_io(&vt82c->superio, OBJECT(d), &superio_ops,
&vt82c->superio_conf, "superio", 2);
memory_region_set_enabled(&vt82c->superio, false);
/* The floppy also uses 0x3f0 and 0x3f1.
* But we do not emulate a floppy, so just set it here. */
memory_region_add_subregion(isa_bus->address_space_io, 0x3f0,
&vt82c->superio);
qemu_register_reset(vt82c686b_reset, d);
return 0;
}
ISABus *vt82c686b_init(PCIBus *bus, int devfn)
{
PCIDevice *d;
d = pci_create_simple_multifunction(bus, devfn, true, "VT82C686B");
return ISA_BUS(qdev_get_child_bus(DEVICE(d), "isa.0"));
}
static void via_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
k->init = vt82c686b_initfn;
k->config_write = vt82c686b_write_config;
k->vendor_id = PCI_VENDOR_ID_VIA;
k->device_id = PCI_DEVICE_ID_VIA_ISA_BRIDGE;
k->class_id = PCI_CLASS_BRIDGE_ISA;
k->revision = 0x40;
dc->desc = "ISA bridge";
dc->cannot_instantiate_with_device_add_yet = true; /* FIXME explain why */
dc->vmsd = &vmstate_via;
}
static const TypeInfo via_info = {
.name = "VT82C686B",
.parent = TYPE_PCI_DEVICE,
.instance_size = sizeof(VT82C686BState),
.class_init = via_class_init,
};
static void vt82c686b_register_types(void)
{
type_register_static(&via_ac97_info);
type_register_static(&via_mc97_info);
type_register_static(&via_pm_info);
type_register_static(&via_info);
}
type_init(vt82c686b_register_types)
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