hw/isa/vt82c686.c - third_party/qemu - Git at Google

 /*
  * 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.
  *
  * VT8231 south bridge support and general clean up to allow it
  * Copyright (c) 2018-2020 BALATON Zoltan
  */

 #include "qemu/osdep.h"
 #include "hw/isa/vt82c686.h"
 #include "hw/pci/pci.h"
 #include "hw/qdev-properties.h"
 #include "hw/isa/isa.h"
 #include "hw/isa/superio.h"
 #include "hw/intc/i8259.h"
 #include "hw/irq.h"
 #include "hw/dma/i8257.h"
 #include "hw/timer/i8254.h"
 #include "hw/rtc/mc146818rtc.h"
 #include "migration/vmstate.h"
 #include "hw/isa/apm.h"
 #include "hw/acpi/acpi.h"
 #include "hw/i2c/pm_smbus.h"
 #include "qapi/error.h"
 #include "qemu/log.h"
 #include "qemu/module.h"
 #include "qemu/range.h"
 #include "qemu/timer.h"
 #include "trace.h"

 #define TYPE_VIA_PM "via-pm"
 OBJECT_DECLARE_SIMPLE_TYPE(ViaPMState, VIA_PM)

 struct ViaPMState {
     PCIDevice dev;
     MemoryRegion io;
     ACPIREGS ar;
     APMState apm;
     PMSMBus smb;
 };

 static void pm_io_space_update(ViaPMState *s)
 {
     uint32_t pmbase = pci_get_long(s->dev.config + 0x48) & 0xff80UL;

     memory_region_transaction_begin();
     memory_region_set_address(&s->io, pmbase);
     memory_region_set_enabled(&s->io, s->dev.config[0x41] & BIT(7));
     memory_region_transaction_commit();
 }

 static void smb_io_space_update(ViaPMState *s)
 {
     uint32_t smbase = pci_get_long(s->dev.config + 0x90) & 0xfff0UL;

     memory_region_transaction_begin();
     memory_region_set_address(&s->smb.io, smbase);
     memory_region_set_enabled(&s->smb.io, s->dev.config[0xd2] & BIT(0));
     memory_region_transaction_commit();
 }

 static int vmstate_acpi_post_load(void *opaque, int version_id)
 {
     ViaPMState *s = opaque;

     pm_io_space_update(s);
     smb_io_space_update(s);
     return 0;
 }

 static const VMStateDescription vmstate_acpi = {
     .name = "vt82c686b_pm",
     .version_id = 1,
     .minimum_version_id = 1,
     .post_load = vmstate_acpi_post_load,
     .fields = (VMStateField[]) {
         VMSTATE_PCI_DEVICE(dev, ViaPMState),
         VMSTATE_UINT16(ar.pm1.evt.sts, ViaPMState),
         VMSTATE_UINT16(ar.pm1.evt.en, ViaPMState),
         VMSTATE_UINT16(ar.pm1.cnt.cnt, ViaPMState),
         VMSTATE_STRUCT(apm, ViaPMState, 0, vmstate_apm, APMState),
         VMSTATE_TIMER_PTR(ar.tmr.timer, ViaPMState),
         VMSTATE_INT64(ar.tmr.overflow_time, ViaPMState),
         VMSTATE_END_OF_LIST()
     }
 };

 static void pm_write_config(PCIDevice *d, uint32_t addr, uint32_t val, int len)
 {
     ViaPMState *s = VIA_PM(d);

     trace_via_pm_write(addr, val, len);
     pci_default_write_config(d, addr, val, len);
     if (ranges_overlap(addr, len, 0x48, 4)) {
         uint32_t v = pci_get_long(s->dev.config + 0x48);
         pci_set_long(s->dev.config + 0x48, (v & 0xff80UL) | 1);
     }
     if (range_covers_byte(addr, len, 0x41)) {
         pm_io_space_update(s);
     }
     if (ranges_overlap(addr, len, 0x90, 4)) {
         uint32_t v = pci_get_long(s->dev.config + 0x90);
         pci_set_long(s->dev.config + 0x90, (v & 0xfff0UL) | 1);
     }
     if (range_covers_byte(addr, len, 0xd2)) {
         s->dev.config[0xd2] &= 0xf;
         smb_io_space_update(s);
     }
 }

 static void pm_io_write(void *op, hwaddr addr, uint64_t data, unsigned size)
 {
     trace_via_pm_io_write(addr, data, size);
 }

 static uint64_t pm_io_read(void *op, hwaddr addr, unsigned size)
 {
     trace_via_pm_io_read(addr, 0, size);
     return 0;
 }

 static const MemoryRegionOps pm_io_ops = {
     .read = pm_io_read,
     .write = pm_io_write,
     .endianness = DEVICE_NATIVE_ENDIAN,
     .impl = {
         .min_access_size = 1,
         .max_access_size = 1,
     },
 };

 static void pm_update_sci(ViaPMState *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);
     if (pci_get_byte(s->dev.config + PCI_INTERRUPT_PIN)) {
         /*
          * FIXME:
          * Fix device model that realizes this PM device and remove
          * this work around.
          * The device model should wire SCI and setup
          * PCI_INTERRUPT_PIN properly.
          * If PIN# = 0(interrupt pin isn't used), don't raise SCI as
          * work around.
          */
         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)
 {
     ViaPMState *s = container_of(ar, ViaPMState, ar);
     pm_update_sci(s);
 }

 static void via_pm_reset(DeviceState *d)
 {
     ViaPMState *s = VIA_PM(d);

     memset(s->dev.config + PCI_CONFIG_HEADER_SIZE, 0,
            PCI_CONFIG_SPACE_SIZE - PCI_CONFIG_HEADER_SIZE);
     /* Power Management IO base */
     pci_set_long(s->dev.config + 0x48, 1);
     /* SMBus IO base */
     pci_set_long(s->dev.config + 0x90, 1);

     acpi_pm1_evt_reset(&s->ar);
     acpi_pm1_cnt_reset(&s->ar);
     acpi_pm_tmr_reset(&s->ar);
     pm_update_sci(s);

     pm_io_space_update(s);
     smb_io_space_update(s);
 }

 static void via_pm_realize(PCIDevice *dev, Error **errp)
 {
     ViaPMState *s = VIA_PM(dev);

     pci_set_word(dev->config + PCI_STATUS, PCI_STATUS_FAST_BACK |
                  PCI_STATUS_DEVSEL_MEDIUM);

     pm_smbus_init(DEVICE(s), &s->smb, false);
     memory_region_add_subregion(pci_address_space_io(dev), 0, &s->smb.io);
     memory_region_set_enabled(&s->smb.io, false);

     apm_init(dev, &s->apm, NULL, s);

     memory_region_init_io(&s->io, OBJECT(dev), &pm_io_ops, s, "via-pm", 128);
     memory_region_add_subregion(pci_address_space_io(dev), 0, &s->io);
     memory_region_set_enabled(&s->io, false);

     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, false, false, 2, false);
 }

 typedef struct via_pm_init_info {
     uint16_t device_id;
 } ViaPMInitInfo;

 static void via_pm_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
     ViaPMInitInfo *info = data;

     k->realize = via_pm_realize;
     k->config_write = pm_write_config;
     k->vendor_id = PCI_VENDOR_ID_VIA;
     k->device_id = info->device_id;
     k->class_id = PCI_CLASS_BRIDGE_OTHER;
     k->revision = 0x40;
     dc->reset = via_pm_reset;
     /* Reason: part of VIA south bridge, does not exist stand alone */
     dc->user_creatable = false;
     dc->vmsd = &vmstate_acpi;
 }

 static const TypeInfo via_pm_info = {
     .name          = TYPE_VIA_PM,
     .parent        = TYPE_PCI_DEVICE,
     .instance_size = sizeof(ViaPMState),
     .abstract      = true,
     .interfaces = (InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
 };

 static const ViaPMInitInfo vt82c686b_pm_init_info = {
     .device_id = PCI_DEVICE_ID_VIA_82C686B_PM,
 };

 static const TypeInfo vt82c686b_pm_info = {
     .name          = TYPE_VT82C686B_PM,
     .parent        = TYPE_VIA_PM,
     .class_init    = via_pm_class_init,
     .class_data    = (void *)&vt82c686b_pm_init_info,
 };

 static const ViaPMInitInfo vt8231_pm_init_info = {
     .device_id = PCI_DEVICE_ID_VIA_8231_PM,
 };

 static const TypeInfo vt8231_pm_info = {
     .name          = TYPE_VT8231_PM,
     .parent        = TYPE_VIA_PM,
     .class_init    = via_pm_class_init,
     .class_data    = (void *)&vt8231_pm_init_info,
 };


 #define TYPE_VIA_SUPERIO "via-superio"
 OBJECT_DECLARE_SIMPLE_TYPE(ViaSuperIOState, VIA_SUPERIO)

 struct ViaSuperIOState {
     ISASuperIODevice superio;
     uint8_t regs[0x100];
     const MemoryRegionOps *io_ops;
     MemoryRegion io;
 };

 static inline void via_superio_io_enable(ViaSuperIOState *s, bool enable)
 {
     memory_region_set_enabled(&s->io, enable);
 }

 static void via_superio_realize(DeviceState *d, Error **errp)
 {
     ViaSuperIOState *s = VIA_SUPERIO(d);
     ISASuperIOClass *ic = ISA_SUPERIO_GET_CLASS(s);
     Error *local_err = NULL;

     assert(s->io_ops);
     ic->parent_realize(d, &local_err);
     if (local_err) {
         error_propagate(errp, local_err);
         return;
     }
     memory_region_init_io(&s->io, OBJECT(d), s->io_ops, s, "via-superio", 2);
     memory_region_set_enabled(&s->io, false);
     /* The floppy also uses 0x3f0 and 0x3f1 but this seems to work anyway */
     memory_region_add_subregion(isa_address_space_io(ISA_DEVICE(s)), 0x3f0,
                                 &s->io);
 }

 static uint64_t via_superio_cfg_read(void *opaque, hwaddr addr, unsigned size)
 {
     ViaSuperIOState *sc = opaque;
     uint8_t idx = sc->regs[0];
     uint8_t val = sc->regs[idx];

     if (addr == 0) {
         return idx;
     }
     if (addr == 1 && idx == 0) {
         val = 0; /* reading reg 0 where we store index value */
     }
     trace_via_superio_read(idx, val);
     return val;
 }

 static void via_superio_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ISASuperIOClass *sc = ISA_SUPERIO_CLASS(klass);

     sc->parent_realize = dc->realize;
     dc->realize = via_superio_realize;
 }

 static const TypeInfo via_superio_info = {
     .name          = TYPE_VIA_SUPERIO,
     .parent        = TYPE_ISA_SUPERIO,
     .instance_size = sizeof(ViaSuperIOState),
     .class_size    = sizeof(ISASuperIOClass),
     .class_init    = via_superio_class_init,
     .abstract      = true,
 };

 #define TYPE_VT82C686B_SUPERIO "vt82c686b-superio"

 static void vt82c686b_superio_cfg_write(void *opaque, hwaddr addr,
                                         uint64_t data, unsigned size)
 {
     ViaSuperIOState *sc = opaque;
     uint8_t idx = sc->regs[0];

     if (addr == 0) { /* config index register */
         sc->regs[0] = data;
         return;
     }

     /* config data register */
     trace_via_superio_write(idx, data);
     switch (idx) {
     case 0x00 ... 0xdf:
     case 0xe4:
     case 0xe5:
     case 0xe9 ... 0xed:
     case 0xf3:
     case 0xf5:
     case 0xf7:
     case 0xf9 ... 0xfb:
     case 0xfd ... 0xff:
         /* ignore write to read only registers */
         return;
     /* case 0xe6 ... 0xe8: Should set base port of parallel and serial */
     default:
         qemu_log_mask(LOG_UNIMP,
                       "via_superio_cfg: unimplemented register 0x%x\n", idx);
         break;
     }
     sc->regs[idx] = data;
 }

 static const MemoryRegionOps vt82c686b_superio_cfg_ops = {
     .read = via_superio_cfg_read,
     .write = vt82c686b_superio_cfg_write,
     .endianness = DEVICE_NATIVE_ENDIAN,
     .impl = {
         .min_access_size = 1,
         .max_access_size = 1,
     },
 };

 static void vt82c686b_superio_reset(DeviceState *dev)
 {
     ViaSuperIOState *s = VIA_SUPERIO(dev);

     memset(s->regs, 0, sizeof(s->regs));
     /* Device ID */
     vt82c686b_superio_cfg_write(s, 0, 0xe0, 1);
     vt82c686b_superio_cfg_write(s, 1, 0x3c, 1);
     /* Function select - all disabled */
     vt82c686b_superio_cfg_write(s, 0, 0xe2, 1);
     vt82c686b_superio_cfg_write(s, 1, 0x03, 1);
     /* Floppy ctrl base addr 0x3f0-7 */
     vt82c686b_superio_cfg_write(s, 0, 0xe3, 1);
     vt82c686b_superio_cfg_write(s, 1, 0xfc, 1);
     /* Parallel port base addr 0x378-f */
     vt82c686b_superio_cfg_write(s, 0, 0xe6, 1);
     vt82c686b_superio_cfg_write(s, 1, 0xde, 1);
     /* Serial port 1 base addr 0x3f8-f */
     vt82c686b_superio_cfg_write(s, 0, 0xe7, 1);
     vt82c686b_superio_cfg_write(s, 1, 0xfe, 1);
     /* Serial port 2 base addr 0x2f8-f */
     vt82c686b_superio_cfg_write(s, 0, 0xe8, 1);
     vt82c686b_superio_cfg_write(s, 1, 0xbe, 1);

     vt82c686b_superio_cfg_write(s, 0, 0, 1);
 }

 static void vt82c686b_superio_init(Object *obj)
 {
     VIA_SUPERIO(obj)->io_ops = &vt82c686b_superio_cfg_ops;
 }

 static void vt82c686b_superio_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ISASuperIOClass *sc = ISA_SUPERIO_CLASS(klass);

     dc->reset = vt82c686b_superio_reset;
     sc->serial.count = 2;
     sc->parallel.count = 1;
     sc->ide.count = 0; /* emulated by via-ide */
     sc->floppy.count = 1;
 }

 static const TypeInfo vt82c686b_superio_info = {
     .name          = TYPE_VT82C686B_SUPERIO,
     .parent        = TYPE_VIA_SUPERIO,
     .instance_size = sizeof(ViaSuperIOState),
     .instance_init = vt82c686b_superio_init,
     .class_size    = sizeof(ISASuperIOClass),
     .class_init    = vt82c686b_superio_class_init,
 };


 #define TYPE_VT8231_SUPERIO "vt8231-superio"

 static void vt8231_superio_cfg_write(void *opaque, hwaddr addr,
                                      uint64_t data, unsigned size)
 {
     ViaSuperIOState *sc = opaque;
     uint8_t idx = sc->regs[0];

     if (addr == 0) { /* config index register */
         sc->regs[0] = data;
         return;
     }

     /* config data register */
     trace_via_superio_write(idx, data);
     switch (idx) {
     case 0x00 ... 0xdf:
     case 0xe7 ... 0xef:
     case 0xf0 ... 0xf1:
     case 0xf5:
     case 0xf8:
     case 0xfd:
         /* ignore write to read only registers */
         return;
     default:
         qemu_log_mask(LOG_UNIMP,
                       "via_superio_cfg: unimplemented register 0x%x\n", idx);
         break;
     }
     sc->regs[idx] = data;
 }

 static const MemoryRegionOps vt8231_superio_cfg_ops = {
     .read = via_superio_cfg_read,
     .write = vt8231_superio_cfg_write,
     .endianness = DEVICE_NATIVE_ENDIAN,
     .impl = {
         .min_access_size = 1,
         .max_access_size = 1,
     },
 };

 static void vt8231_superio_reset(DeviceState *dev)
 {
     ViaSuperIOState *s = VIA_SUPERIO(dev);

     memset(s->regs, 0, sizeof(s->regs));
     /* Device ID */
     s->regs[0xf0] = 0x3c;
     /* Device revision */
     s->regs[0xf1] = 0x01;
     /* Function select - all disabled */
     vt8231_superio_cfg_write(s, 0, 0xf2, 1);
     vt8231_superio_cfg_write(s, 1, 0x03, 1);
     /* Serial port base addr */
     vt8231_superio_cfg_write(s, 0, 0xf4, 1);
     vt8231_superio_cfg_write(s, 1, 0xfe, 1);
     /* Parallel port base addr */
     vt8231_superio_cfg_write(s, 0, 0xf6, 1);
     vt8231_superio_cfg_write(s, 1, 0xde, 1);
     /* Floppy ctrl base addr */
     vt8231_superio_cfg_write(s, 0, 0xf7, 1);
     vt8231_superio_cfg_write(s, 1, 0xfc, 1);

     vt8231_superio_cfg_write(s, 0, 0, 1);
 }

 static void vt8231_superio_init(Object *obj)
 {
     VIA_SUPERIO(obj)->io_ops = &vt8231_superio_cfg_ops;
 }

 static uint16_t vt8231_superio_serial_iobase(ISASuperIODevice *sio,
                                              uint8_t index)
 {
         return 0x2f8; /* FIXME: This should be settable via registers f2-f4 */
 }

 static void vt8231_superio_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ISASuperIOClass *sc = ISA_SUPERIO_CLASS(klass);

     dc->reset = vt8231_superio_reset;
     sc->serial.count = 1;
     sc->serial.get_iobase = vt8231_superio_serial_iobase;
     sc->parallel.count = 1;
     sc->ide.count = 0; /* emulated by via-ide */
     sc->floppy.count = 1;
 }

 static const TypeInfo vt8231_superio_info = {
     .name          = TYPE_VT8231_SUPERIO,
     .parent        = TYPE_VIA_SUPERIO,
     .instance_size = sizeof(ViaSuperIOState),
     .instance_init = vt8231_superio_init,
     .class_size    = sizeof(ISASuperIOClass),
     .class_init    = vt8231_superio_class_init,
 };


 #define TYPE_VIA_ISA "via-isa"
 OBJECT_DECLARE_SIMPLE_TYPE(ViaISAState, VIA_ISA)

 struct ViaISAState {
     PCIDevice dev;
     qemu_irq cpu_intr;
     qemu_irq *isa_irqs;
     ISABus *isa_bus;
     ViaSuperIOState *via_sio;
 };

 static const VMStateDescription vmstate_via = {
     .name = "via-isa",
     .version_id = 1,
     .minimum_version_id = 1,
     .fields = (VMStateField[]) {
         VMSTATE_PCI_DEVICE(dev, ViaISAState),
         VMSTATE_END_OF_LIST()
     }
 };

 static const TypeInfo via_isa_info = {
     .name          = TYPE_VIA_ISA,
     .parent        = TYPE_PCI_DEVICE,
     .instance_size = sizeof(ViaISAState),
     .abstract      = true,
     .interfaces    = (InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
 };

 void via_isa_set_irq(PCIDevice *d, int n, int level)
 {
     ViaISAState *s = VIA_ISA(d);
     qemu_set_irq(s->isa_irqs[n], level);
 }

 static void via_isa_request_i8259_irq(void *opaque, int irq, int level)
 {
     ViaISAState *s = opaque;
     qemu_set_irq(s->cpu_intr, level);
 }

 static void via_isa_realize(PCIDevice *d, Error **errp)
 {
     ViaISAState *s = VIA_ISA(d);
     DeviceState *dev = DEVICE(d);
     qemu_irq *isa_irq;
     int i;

     qdev_init_gpio_out(dev, &s->cpu_intr, 1);
     isa_irq = qemu_allocate_irqs(via_isa_request_i8259_irq, s, 1);
     s->isa_bus = isa_bus_new(dev, get_system_memory(), pci_address_space_io(d),
                           &error_fatal);
     s->isa_irqs = i8259_init(s->isa_bus, *isa_irq);
     isa_bus_irqs(s->isa_bus, s->isa_irqs);
     i8254_pit_init(s->isa_bus, 0x40, 0, NULL);
     i8257_dma_init(s->isa_bus, 0);
     mc146818_rtc_init(s->isa_bus, 2000, NULL);

     for (i = 0; i < PCI_CONFIG_HEADER_SIZE; i++) {
         if (i < PCI_COMMAND || i >= PCI_REVISION_ID) {
             d->wmask[i] = 0;
         }
     }
 }

 /* TYPE_VT82C686B_ISA */

 static void vt82c686b_write_config(PCIDevice *d, uint32_t addr,
                                    uint32_t val, int len)
 {
     ViaISAState *s = VIA_ISA(d);

     trace_via_isa_write(addr, val, len);
     pci_default_write_config(d, addr, val, len);
     if (addr == 0x85) {
         /* BIT(1): enable or disable superio config io ports */
         via_superio_io_enable(s->via_sio, val & BIT(1));
     }
 }

 static void vt82c686b_isa_reset(DeviceState *dev)
 {
     ViaISAState *s = VIA_ISA(dev);
     uint8_t *pci_conf = s->dev.config;

     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 */
 }

 static void vt82c686b_realize(PCIDevice *d, Error **errp)
 {
     ViaISAState *s = VIA_ISA(d);

     via_isa_realize(d, errp);
     s->via_sio = VIA_SUPERIO(isa_create_simple(s->isa_bus,
                                                TYPE_VT82C686B_SUPERIO));
 }

 static void vt82c686b_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);

     k->realize = vt82c686b_realize;
     k->config_write = vt82c686b_write_config;
     k->vendor_id = PCI_VENDOR_ID_VIA;
     k->device_id = PCI_DEVICE_ID_VIA_82C686B_ISA;
     k->class_id = PCI_CLASS_BRIDGE_ISA;
     k->revision = 0x40;
     dc->reset = vt82c686b_isa_reset;
     dc->desc = "ISA bridge";
     dc->vmsd = &vmstate_via;
     /* Reason: part of VIA VT82C686 southbridge, needs to be wired up */
     dc->user_creatable = false;
 }

 static const TypeInfo vt82c686b_isa_info = {
     .name          = TYPE_VT82C686B_ISA,
     .parent        = TYPE_VIA_ISA,
     .instance_size = sizeof(ViaISAState),
     .class_init    = vt82c686b_class_init,
 };

 /* TYPE_VT8231_ISA */

 static void vt8231_write_config(PCIDevice *d, uint32_t addr,
                                 uint32_t val, int len)
 {
     ViaISAState *s = VIA_ISA(d);

     trace_via_isa_write(addr, val, len);
     pci_default_write_config(d, addr, val, len);
     if (addr == 0x50) {
         /* BIT(2): enable or disable superio config io ports */
         via_superio_io_enable(s->via_sio, val & BIT(2));
     }
 }

 static void vt8231_isa_reset(DeviceState *dev)
 {
     ViaISAState *s = VIA_ISA(dev);
     uint8_t *pci_conf = s->dev.config;

     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[0x58] = 0x40; /* Miscellaneous Control 0 */
     pci_conf[0x67] = 0x08; /* Fast IR Config */
     pci_conf[0x6b] = 0x01; /* Fast IR I/O Base */
 }

 static void vt8231_realize(PCIDevice *d, Error **errp)
 {
     ViaISAState *s = VIA_ISA(d);

     via_isa_realize(d, errp);
     s->via_sio = VIA_SUPERIO(isa_create_simple(s->isa_bus,
                                                TYPE_VT8231_SUPERIO));
 }

 static void vt8231_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);

     k->realize = vt8231_realize;
     k->config_write = vt8231_write_config;
     k->vendor_id = PCI_VENDOR_ID_VIA;
     k->device_id = PCI_DEVICE_ID_VIA_8231_ISA;
     k->class_id = PCI_CLASS_BRIDGE_ISA;
     k->revision = 0x10;
     dc->reset = vt8231_isa_reset;
     dc->desc = "ISA bridge";
     dc->vmsd = &vmstate_via;
     /* Reason: part of VIA VT8231 southbridge, needs to be wired up */
     dc->user_creatable = false;
 }

 static const TypeInfo vt8231_isa_info = {
     .name          = TYPE_VT8231_ISA,
     .parent        = TYPE_VIA_ISA,
     .instance_size = sizeof(ViaISAState),
     .class_init    = vt8231_class_init,
 };


 static void vt82c686b_register_types(void)
 {
     type_register_static(&via_pm_info);
     type_register_static(&vt82c686b_pm_info);
     type_register_static(&vt8231_pm_info);
     type_register_static(&via_superio_info);
     type_register_static(&vt82c686b_superio_info);
     type_register_static(&vt8231_superio_info);
     type_register_static(&via_isa_info);
     type_register_static(&vt82c686b_isa_info);
     type_register_static(&vt8231_isa_info);
 }

 type_init(vt82c686b_register_types)
	/*
	* 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.
	*
	* VT8231 south bridge support and general clean up to allow it
	* Copyright (c) 2018-2020 BALATON Zoltan
	*/

	#include "qemu/osdep.h"
	#include "hw/isa/vt82c686.h"
	#include "hw/pci/pci.h"
	#include "hw/qdev-properties.h"
	#include "hw/isa/isa.h"
	#include "hw/isa/superio.h"
	#include "hw/intc/i8259.h"
	#include "hw/irq.h"
	#include "hw/dma/i8257.h"
	#include "hw/timer/i8254.h"
	#include "hw/rtc/mc146818rtc.h"
	#include "migration/vmstate.h"
	#include "hw/isa/apm.h"
	#include "hw/acpi/acpi.h"
	#include "hw/i2c/pm_smbus.h"
	#include "qapi/error.h"
	#include "qemu/log.h"
	#include "qemu/module.h"
	#include "qemu/range.h"
	#include "qemu/timer.h"
	#include "trace.h"

	#define TYPE_VIA_PM "via-pm"
	OBJECT_DECLARE_SIMPLE_TYPE(ViaPMState, VIA_PM)

	struct ViaPMState {
	PCIDevice dev;
	MemoryRegion io;
	ACPIREGS ar;
	APMState apm;
	PMSMBus smb;
	};

	static void pm_io_space_update(ViaPMState *s)
	{
	uint32_t pmbase = pci_get_long(s->dev.config + 0x48) & 0xff80UL;

	memory_region_transaction_begin();
	memory_region_set_address(&s->io, pmbase);
	memory_region_set_enabled(&s->io, s->dev.config[0x41] & BIT(7));
	memory_region_transaction_commit();
	}

	static void smb_io_space_update(ViaPMState *s)
	{
	uint32_t smbase = pci_get_long(s->dev.config + 0x90) & 0xfff0UL;

	memory_region_transaction_begin();
	memory_region_set_address(&s->smb.io, smbase);
	memory_region_set_enabled(&s->smb.io, s->dev.config[0xd2] & BIT(0));
	memory_region_transaction_commit();
	}

	static int vmstate_acpi_post_load(void *opaque, int version_id)
	{
	ViaPMState *s = opaque;

	pm_io_space_update(s);
	smb_io_space_update(s);
	return 0;
	}

	static const VMStateDescription vmstate_acpi = {
	.name = "vt82c686b_pm",
	.version_id = 1,
	.minimum_version_id = 1,
	.post_load = vmstate_acpi_post_load,
	.fields = (VMStateField[]) {
	VMSTATE_PCI_DEVICE(dev, ViaPMState),
	VMSTATE_UINT16(ar.pm1.evt.sts, ViaPMState),
	VMSTATE_UINT16(ar.pm1.evt.en, ViaPMState),
	VMSTATE_UINT16(ar.pm1.cnt.cnt, ViaPMState),
	VMSTATE_STRUCT(apm, ViaPMState, 0, vmstate_apm, APMState),
	VMSTATE_TIMER_PTR(ar.tmr.timer, ViaPMState),
	VMSTATE_INT64(ar.tmr.overflow_time, ViaPMState),
	VMSTATE_END_OF_LIST()
	}
	};

	static void pm_write_config(PCIDevice *d, uint32_t addr, uint32_t val, int len)
	{
	ViaPMState *s = VIA_PM(d);

	trace_via_pm_write(addr, val, len);
	pci_default_write_config(d, addr, val, len);
	if (ranges_overlap(addr, len, 0x48, 4)) {
	uint32_t v = pci_get_long(s->dev.config + 0x48);
	pci_set_long(s->dev.config + 0x48, (v & 0xff80UL) \| 1);
	}
	if (range_covers_byte(addr, len, 0x41)) {
	pm_io_space_update(s);
	}
	if (ranges_overlap(addr, len, 0x90, 4)) {
	uint32_t v = pci_get_long(s->dev.config + 0x90);
	pci_set_long(s->dev.config + 0x90, (v & 0xfff0UL) \| 1);
	}
	if (range_covers_byte(addr, len, 0xd2)) {
	s->dev.config[0xd2] &= 0xf;
	smb_io_space_update(s);
	}
	}

	static void pm_io_write(void *op, hwaddr addr, uint64_t data, unsigned size)
	{
	trace_via_pm_io_write(addr, data, size);
	}

	static uint64_t pm_io_read(void *op, hwaddr addr, unsigned size)
	{
	trace_via_pm_io_read(addr, 0, size);
	return 0;
	}

	static const MemoryRegionOps pm_io_ops = {
	.read = pm_io_read,
	.write = pm_io_write,
	.endianness = DEVICE_NATIVE_ENDIAN,
	.impl = {
	.min_access_size = 1,
	.max_access_size = 1,
	},
	};

	static void pm_update_sci(ViaPMState *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);
	if (pci_get_byte(s->dev.config + PCI_INTERRUPT_PIN)) {
	/*
	* FIXME:
	* Fix device model that realizes this PM device and remove
	* this work around.
	* The device model should wire SCI and setup
	* PCI_INTERRUPT_PIN properly.
	* If PIN# = 0(interrupt pin isn't used), don't raise SCI as
	* work around.
	*/
	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)
	{
	ViaPMState *s = container_of(ar, ViaPMState, ar);
	pm_update_sci(s);
	}

	static void via_pm_reset(DeviceState *d)
	{
	ViaPMState *s = VIA_PM(d);

	memset(s->dev.config + PCI_CONFIG_HEADER_SIZE, 0,
	PCI_CONFIG_SPACE_SIZE - PCI_CONFIG_HEADER_SIZE);
	/* Power Management IO base */
	pci_set_long(s->dev.config + 0x48, 1);
	/* SMBus IO base */
	pci_set_long(s->dev.config + 0x90, 1);

	acpi_pm1_evt_reset(&s->ar);
	acpi_pm1_cnt_reset(&s->ar);
	acpi_pm_tmr_reset(&s->ar);
	pm_update_sci(s);

	pm_io_space_update(s);
	smb_io_space_update(s);
	}

	static void via_pm_realize(PCIDevice dev, Error *errp)
	{
	ViaPMState *s = VIA_PM(dev);

	pci_set_word(dev->config + PCI_STATUS, PCI_STATUS_FAST_BACK \|
	PCI_STATUS_DEVSEL_MEDIUM);

	pm_smbus_init(DEVICE(s), &s->smb, false);
	memory_region_add_subregion(pci_address_space_io(dev), 0, &s->smb.io);
	memory_region_set_enabled(&s->smb.io, false);

	apm_init(dev, &s->apm, NULL, s);

	memory_region_init_io(&s->io, OBJECT(dev), &pm_io_ops, s, "via-pm", 128);
	memory_region_add_subregion(pci_address_space_io(dev), 0, &s->io);
	memory_region_set_enabled(&s->io, false);

	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, false, false, 2, false);
	}

	typedef struct via_pm_init_info {
	uint16_t device_id;
	} ViaPMInitInfo;

	static void via_pm_class_init(ObjectClass klass, void data)
	{
	DeviceClass *dc = DEVICE_CLASS(klass);
	PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
	ViaPMInitInfo *info = data;

	k->realize = via_pm_realize;
	k->config_write = pm_write_config;
	k->vendor_id = PCI_VENDOR_ID_VIA;
	k->device_id = info->device_id;
	k->class_id = PCI_CLASS_BRIDGE_OTHER;
	k->revision = 0x40;
	dc->reset = via_pm_reset;
	/* Reason: part of VIA south bridge, does not exist stand alone */
	dc->user_creatable = false;
	dc->vmsd = &vmstate_acpi;
	}

	static const TypeInfo via_pm_info = {
	.name = TYPE_VIA_PM,
	.parent = TYPE_PCI_DEVICE,
	.instance_size = sizeof(ViaPMState),
	.abstract = true,
	.interfaces = (InterfaceInfo[]) {
	{ INTERFACE_CONVENTIONAL_PCI_DEVICE },
	{ },
	},
	};

	static const ViaPMInitInfo vt82c686b_pm_init_info = {
	.device_id = PCI_DEVICE_ID_VIA_82C686B_PM,
	};

	static const TypeInfo vt82c686b_pm_info = {
	.name = TYPE_VT82C686B_PM,
	.parent = TYPE_VIA_PM,
	.class_init = via_pm_class_init,
	.class_data = (void *)&vt82c686b_pm_init_info,
	};

	static const ViaPMInitInfo vt8231_pm_init_info = {
	.device_id = PCI_DEVICE_ID_VIA_8231_PM,
	};

	static const TypeInfo vt8231_pm_info = {
	.name = TYPE_VT8231_PM,
	.parent = TYPE_VIA_PM,
	.class_init = via_pm_class_init,
	.class_data = (void *)&vt8231_pm_init_info,
	};


	#define TYPE_VIA_SUPERIO "via-superio"
	OBJECT_DECLARE_SIMPLE_TYPE(ViaSuperIOState, VIA_SUPERIO)

	struct ViaSuperIOState {
	ISASuperIODevice superio;
	uint8_t regs[0x100];
	const MemoryRegionOps *io_ops;
	MemoryRegion io;
	};

	static inline void via_superio_io_enable(ViaSuperIOState *s, bool enable)
	{
	memory_region_set_enabled(&s->io, enable);
	}

	static void via_superio_realize(DeviceState d, Error *errp)
	{
	ViaSuperIOState *s = VIA_SUPERIO(d);
	ISASuperIOClass *ic = ISA_SUPERIO_GET_CLASS(s);
	Error *local_err = NULL;

	assert(s->io_ops);
	ic->parent_realize(d, &local_err);
	if (local_err) {
	error_propagate(errp, local_err);
	return;
	}
	memory_region_init_io(&s->io, OBJECT(d), s->io_ops, s, "via-superio", 2);
	memory_region_set_enabled(&s->io, false);
	/* The floppy also uses 0x3f0 and 0x3f1 but this seems to work anyway */
	memory_region_add_subregion(isa_address_space_io(ISA_DEVICE(s)), 0x3f0,
	&s->io);
	}

	static uint64_t via_superio_cfg_read(void *opaque, hwaddr addr, unsigned size)
	{
	ViaSuperIOState *sc = opaque;
	uint8_t idx = sc->regs[0];
	uint8_t val = sc->regs[idx];

	if (addr == 0) {
	return idx;
	}
	if (addr == 1 && idx == 0) {
	val = 0; /* reading reg 0 where we store index value */
	}
	trace_via_superio_read(idx, val);
	return val;
	}

	static void via_superio_class_init(ObjectClass klass, void data)
	{
	DeviceClass *dc = DEVICE_CLASS(klass);
	ISASuperIOClass *sc = ISA_SUPERIO_CLASS(klass);

	sc->parent_realize = dc->realize;
	dc->realize = via_superio_realize;
	}

	static const TypeInfo via_superio_info = {
	.name = TYPE_VIA_SUPERIO,
	.parent = TYPE_ISA_SUPERIO,
	.instance_size = sizeof(ViaSuperIOState),
	.class_size = sizeof(ISASuperIOClass),
	.class_init = via_superio_class_init,
	.abstract = true,
	};

	#define TYPE_VT82C686B_SUPERIO "vt82c686b-superio"

	static void vt82c686b_superio_cfg_write(void *opaque, hwaddr addr,
	uint64_t data, unsigned size)
	{
	ViaSuperIOState *sc = opaque;
	uint8_t idx = sc->regs[0];

	if (addr == 0) { /* config index register */
	sc->regs[0] = data;
	return;
	}

	/* config data register */
	trace_via_superio_write(idx, data);
	switch (idx) {
	case 0x00 ... 0xdf:
	case 0xe4:
	case 0xe5:
	case 0xe9 ... 0xed:
	case 0xf3:
	case 0xf5:
	case 0xf7:
	case 0xf9 ... 0xfb:
	case 0xfd ... 0xff:
	/* ignore write to read only registers */
	return;
	/* case 0xe6 ... 0xe8: Should set base port of parallel and serial */
	default:
	qemu_log_mask(LOG_UNIMP,
	"via_superio_cfg: unimplemented register 0x%x\n", idx);
	break;
	}
	sc->regs[idx] = data;
	}

	static const MemoryRegionOps vt82c686b_superio_cfg_ops = {
	.read = via_superio_cfg_read,
	.write = vt82c686b_superio_cfg_write,
	.endianness = DEVICE_NATIVE_ENDIAN,
	.impl = {
	.min_access_size = 1,
	.max_access_size = 1,
	},
	};

	static void vt82c686b_superio_reset(DeviceState *dev)
	{
	ViaSuperIOState *s = VIA_SUPERIO(dev);

	memset(s->regs, 0, sizeof(s->regs));
	/* Device ID */
	vt82c686b_superio_cfg_write(s, 0, 0xe0, 1);
	vt82c686b_superio_cfg_write(s, 1, 0x3c, 1);
	/* Function select - all disabled */
	vt82c686b_superio_cfg_write(s, 0, 0xe2, 1);
	vt82c686b_superio_cfg_write(s, 1, 0x03, 1);
	/* Floppy ctrl base addr 0x3f0-7 */
	vt82c686b_superio_cfg_write(s, 0, 0xe3, 1);
	vt82c686b_superio_cfg_write(s, 1, 0xfc, 1);
	/* Parallel port base addr 0x378-f */
	vt82c686b_superio_cfg_write(s, 0, 0xe6, 1);
	vt82c686b_superio_cfg_write(s, 1, 0xde, 1);
	/* Serial port 1 base addr 0x3f8-f */
	vt82c686b_superio_cfg_write(s, 0, 0xe7, 1);
	vt82c686b_superio_cfg_write(s, 1, 0xfe, 1);
	/* Serial port 2 base addr 0x2f8-f */
	vt82c686b_superio_cfg_write(s, 0, 0xe8, 1);
	vt82c686b_superio_cfg_write(s, 1, 0xbe, 1);

	vt82c686b_superio_cfg_write(s, 0, 0, 1);
	}

	static void vt82c686b_superio_init(Object *obj)
	{
	VIA_SUPERIO(obj)->io_ops = &vt82c686b_superio_cfg_ops;
	}

	static void vt82c686b_superio_class_init(ObjectClass klass, void data)
	{
	DeviceClass *dc = DEVICE_CLASS(klass);
	ISASuperIOClass *sc = ISA_SUPERIO_CLASS(klass);

	dc->reset = vt82c686b_superio_reset;
	sc->serial.count = 2;
	sc->parallel.count = 1;
	sc->ide.count = 0; /* emulated by via-ide */
	sc->floppy.count = 1;
	}

	static const TypeInfo vt82c686b_superio_info = {
	.name = TYPE_VT82C686B_SUPERIO,
	.parent = TYPE_VIA_SUPERIO,
	.instance_size = sizeof(ViaSuperIOState),
	.instance_init = vt82c686b_superio_init,
	.class_size = sizeof(ISASuperIOClass),
	.class_init = vt82c686b_superio_class_init,
	};


	#define TYPE_VT8231_SUPERIO "vt8231-superio"

	static void vt8231_superio_cfg_write(void *opaque, hwaddr addr,
	uint64_t data, unsigned size)
	{
	ViaSuperIOState *sc = opaque;
	uint8_t idx = sc->regs[0];

	if (addr == 0) { /* config index register */
	sc->regs[0] = data;
	return;
	}

	/* config data register */
	trace_via_superio_write(idx, data);
	switch (idx) {
	case 0x00 ... 0xdf:
	case 0xe7 ... 0xef:
	case 0xf0 ... 0xf1:
	case 0xf5:
	case 0xf8:
	case 0xfd:
	/* ignore write to read only registers */
	return;
	default:
	qemu_log_mask(LOG_UNIMP,
	"via_superio_cfg: unimplemented register 0x%x\n", idx);
	break;
	}
	sc->regs[idx] = data;
	}

	static const MemoryRegionOps vt8231_superio_cfg_ops = {
	.read = via_superio_cfg_read,
	.write = vt8231_superio_cfg_write,
	.endianness = DEVICE_NATIVE_ENDIAN,
	.impl = {
	.min_access_size = 1,
	.max_access_size = 1,
	},
	};

	static void vt8231_superio_reset(DeviceState *dev)
	{
	ViaSuperIOState *s = VIA_SUPERIO(dev);

	memset(s->regs, 0, sizeof(s->regs));
	/* Device ID */
	s->regs[0xf0] = 0x3c;
	/* Device revision */
	s->regs[0xf1] = 0x01;
	/* Function select - all disabled */
	vt8231_superio_cfg_write(s, 0, 0xf2, 1);
	vt8231_superio_cfg_write(s, 1, 0x03, 1);
	/* Serial port base addr */
	vt8231_superio_cfg_write(s, 0, 0xf4, 1);
	vt8231_superio_cfg_write(s, 1, 0xfe, 1);
	/* Parallel port base addr */
	vt8231_superio_cfg_write(s, 0, 0xf6, 1);
	vt8231_superio_cfg_write(s, 1, 0xde, 1);
	/* Floppy ctrl base addr */
	vt8231_superio_cfg_write(s, 0, 0xf7, 1);
	vt8231_superio_cfg_write(s, 1, 0xfc, 1);

	vt8231_superio_cfg_write(s, 0, 0, 1);
	}

	static void vt8231_superio_init(Object *obj)
	{
	VIA_SUPERIO(obj)->io_ops = &vt8231_superio_cfg_ops;
	}

	static uint16_t vt8231_superio_serial_iobase(ISASuperIODevice *sio,
	uint8_t index)
	{
	return 0x2f8; /* FIXME: This should be settable via registers f2-f4 */
	}

	static void vt8231_superio_class_init(ObjectClass klass, void data)
	{
	DeviceClass *dc = DEVICE_CLASS(klass);
	ISASuperIOClass *sc = ISA_SUPERIO_CLASS(klass);

	dc->reset = vt8231_superio_reset;
	sc->serial.count = 1;
	sc->serial.get_iobase = vt8231_superio_serial_iobase;
	sc->parallel.count = 1;
	sc->ide.count = 0; /* emulated by via-ide */
	sc->floppy.count = 1;
	}

	static const TypeInfo vt8231_superio_info = {
	.name = TYPE_VT8231_SUPERIO,
	.parent = TYPE_VIA_SUPERIO,
	.instance_size = sizeof(ViaSuperIOState),
	.instance_init = vt8231_superio_init,
	.class_size = sizeof(ISASuperIOClass),
	.class_init = vt8231_superio_class_init,
	};


	#define TYPE_VIA_ISA "via-isa"
	OBJECT_DECLARE_SIMPLE_TYPE(ViaISAState, VIA_ISA)

	struct ViaISAState {
	PCIDevice dev;
	qemu_irq cpu_intr;
	qemu_irq *isa_irqs;
	ISABus *isa_bus;
	ViaSuperIOState *via_sio;
	};

	static const VMStateDescription vmstate_via = {
	.name = "via-isa",
	.version_id = 1,
	.minimum_version_id = 1,
	.fields = (VMStateField[]) {
	VMSTATE_PCI_DEVICE(dev, ViaISAState),
	VMSTATE_END_OF_LIST()
	}
	};

	static const TypeInfo via_isa_info = {
	.name = TYPE_VIA_ISA,
	.parent = TYPE_PCI_DEVICE,
	.instance_size = sizeof(ViaISAState),
	.abstract = true,
	.interfaces = (InterfaceInfo[]) {
	{ INTERFACE_CONVENTIONAL_PCI_DEVICE },
	{ },
	},
	};

	void via_isa_set_irq(PCIDevice *d, int n, int level)
	{
	ViaISAState *s = VIA_ISA(d);
	qemu_set_irq(s->isa_irqs[n], level);
	}

	static void via_isa_request_i8259_irq(void *opaque, int irq, int level)
	{
	ViaISAState *s = opaque;
	qemu_set_irq(s->cpu_intr, level);
	}

	static void via_isa_realize(PCIDevice d, Error *errp)
	{
	ViaISAState *s = VIA_ISA(d);
	DeviceState *dev = DEVICE(d);
	qemu_irq *isa_irq;
	int i;

	qdev_init_gpio_out(dev, &s->cpu_intr, 1);
	isa_irq = qemu_allocate_irqs(via_isa_request_i8259_irq, s, 1);
	s->isa_bus = isa_bus_new(dev, get_system_memory(), pci_address_space_io(d),
	&error_fatal);
	s->isa_irqs = i8259_init(s->isa_bus, *isa_irq);
	isa_bus_irqs(s->isa_bus, s->isa_irqs);
	i8254_pit_init(s->isa_bus, 0x40, 0, NULL);
	i8257_dma_init(s->isa_bus, 0);
	mc146818_rtc_init(s->isa_bus, 2000, NULL);

	for (i = 0; i < PCI_CONFIG_HEADER_SIZE; i++) {
	if (i < PCI_COMMAND \|\| i >= PCI_REVISION_ID) {
	d->wmask[i] = 0;
	}
	}
	}

	/* TYPE_VT82C686B_ISA */

	static void vt82c686b_write_config(PCIDevice *d, uint32_t addr,
	uint32_t val, int len)
	{
	ViaISAState *s = VIA_ISA(d);

	trace_via_isa_write(addr, val, len);
	pci_default_write_config(d, addr, val, len);
	if (addr == 0x85) {
	/* BIT(1): enable or disable superio config io ports */
	via_superio_io_enable(s->via_sio, val & BIT(1));
	}
	}

	static void vt82c686b_isa_reset(DeviceState *dev)
	{
	ViaISAState *s = VIA_ISA(dev);
	uint8_t *pci_conf = s->dev.config;

	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 */
	}

	static void vt82c686b_realize(PCIDevice d, Error *errp)
	{
	ViaISAState *s = VIA_ISA(d);

	via_isa_realize(d, errp);
	s->via_sio = VIA_SUPERIO(isa_create_simple(s->isa_bus,
	TYPE_VT82C686B_SUPERIO));
	}

	static void vt82c686b_class_init(ObjectClass klass, void data)
	{
	DeviceClass *dc = DEVICE_CLASS(klass);
	PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);

	k->realize = vt82c686b_realize;
	k->config_write = vt82c686b_write_config;
	k->vendor_id = PCI_VENDOR_ID_VIA;
	k->device_id = PCI_DEVICE_ID_VIA_82C686B_ISA;
	k->class_id = PCI_CLASS_BRIDGE_ISA;
	k->revision = 0x40;
	dc->reset = vt82c686b_isa_reset;
	dc->desc = "ISA bridge";
	dc->vmsd = &vmstate_via;
	/* Reason: part of VIA VT82C686 southbridge, needs to be wired up */
	dc->user_creatable = false;
	}

	static const TypeInfo vt82c686b_isa_info = {
	.name = TYPE_VT82C686B_ISA,
	.parent = TYPE_VIA_ISA,
	.instance_size = sizeof(ViaISAState),
	.class_init = vt82c686b_class_init,
	};

	/* TYPE_VT8231_ISA */

	static void vt8231_write_config(PCIDevice *d, uint32_t addr,
	uint32_t val, int len)
	{
	ViaISAState *s = VIA_ISA(d);

	trace_via_isa_write(addr, val, len);
	pci_default_write_config(d, addr, val, len);
	if (addr == 0x50) {
	/* BIT(2): enable or disable superio config io ports */
	via_superio_io_enable(s->via_sio, val & BIT(2));
	}
	}

	static void vt8231_isa_reset(DeviceState *dev)
	{
	ViaISAState *s = VIA_ISA(dev);
	uint8_t *pci_conf = s->dev.config;

	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[0x58] = 0x40; /* Miscellaneous Control 0 */
	pci_conf[0x67] = 0x08; /* Fast IR Config */
	pci_conf[0x6b] = 0x01; /* Fast IR I/O Base */
	}

	static void vt8231_realize(PCIDevice d, Error *errp)
	{
	ViaISAState *s = VIA_ISA(d);

	via_isa_realize(d, errp);
	s->via_sio = VIA_SUPERIO(isa_create_simple(s->isa_bus,
	TYPE_VT8231_SUPERIO));
	}

	static void vt8231_class_init(ObjectClass klass, void data)
	{
	DeviceClass *dc = DEVICE_CLASS(klass);
	PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);

	k->realize = vt8231_realize;
	k->config_write = vt8231_write_config;
	k->vendor_id = PCI_VENDOR_ID_VIA;
	k->device_id = PCI_DEVICE_ID_VIA_8231_ISA;
	k->class_id = PCI_CLASS_BRIDGE_ISA;
	k->revision = 0x10;
	dc->reset = vt8231_isa_reset;
	dc->desc = "ISA bridge";
	dc->vmsd = &vmstate_via;
	/* Reason: part of VIA VT8231 southbridge, needs to be wired up */
	dc->user_creatable = false;
	}

	static const TypeInfo vt8231_isa_info = {
	.name = TYPE_VT8231_ISA,
	.parent = TYPE_VIA_ISA,
	.instance_size = sizeof(ViaISAState),
	.class_init = vt8231_class_init,
	};


	static void vt82c686b_register_types(void)
	{
	type_register_static(&via_pm_info);
	type_register_static(&vt82c686b_pm_info);
	type_register_static(&vt8231_pm_info);
	type_register_static(&via_superio_info);
	type_register_static(&vt82c686b_superio_info);
	type_register_static(&vt8231_superio_info);
	type_register_static(&via_isa_info);
	type_register_static(&vt82c686b_isa_info);
	type_register_static(&vt8231_isa_info);
	}

	type_init(vt82c686b_register_types)