hw/isa/vt82c686.c

   1 /*
   2  * VT82C686B south bridge support
   3  *
   4  * Copyright (c) 2008 yajin (yajin@vm-kernel.org)
   5  * Copyright (c) 2009 chenming (chenming@rdc.faw.com.cn)
   6  * Copyright (c) 2010 Huacai Chen (zltjiangshi@gmail.com)
   7  * This code is licensed under the GNU GPL v2.
   8  *
   9  * Contributions after 2012-01-13 are licensed under the terms of the
  10  * GNU GPL, version 2 or (at your option) any later version.
  11  */
  12
  13 #include "qemu/osdep.h"
  14 #include "hw/isa/vt82c686.h"
  15 #include "hw/pci/pci.h"
  16 #include "hw/qdev-properties.h"
  17 #include "hw/isa/isa.h"
  18 #include "hw/isa/superio.h"
  19 #include "hw/intc/i8259.h"
  20 #include "hw/irq.h"
  21 #include "hw/dma/i8257.h"
  22 #include "hw/timer/i8254.h"
  23 #include "hw/rtc/mc146818rtc.h"
  24 #include "migration/vmstate.h"
  25 #include "hw/isa/apm.h"
  26 #include "hw/acpi/acpi.h"
  27 #include "hw/i2c/pm_smbus.h"
  28 #include "qapi/error.h"
  29 #include "qemu/module.h"
  30 #include "qemu/range.h"
  31 #include "qemu/timer.h"
  32 #include "exec/address-spaces.h"
  33 #include "trace.h"
  34
  35 #define TYPE_VIA_PM "via-pm"
  36 OBJECT_DECLARE_SIMPLE_TYPE(ViaPMState, VIA_PM)
  37
  38 struct ViaPMState {
  39     PCIDevice dev;
  40     MemoryRegion io;
  41     ACPIREGS ar;
  42     APMState apm;
  43     PMSMBus smb;
  44 };
  45
  46 static void pm_io_space_update(ViaPMState *s)
  47 {
  48     uint32_t pmbase = pci_get_long(s->dev.config + 0x48) & 0xff80UL;
  49
  50     memory_region_transaction_begin();
  51     memory_region_set_address(&s->io, pmbase);
  52     memory_region_set_enabled(&s->io, s->dev.config[0x41] & BIT(7));
  53     memory_region_transaction_commit();
  54 }
  55
  56 static void smb_io_space_update(ViaPMState *s)
  57 {
  58     uint32_t smbase = pci_get_long(s->dev.config + 0x90) & 0xfff0UL;
  59
  60     memory_region_transaction_begin();
  61     memory_region_set_address(&s->smb.io, smbase);
  62     memory_region_set_enabled(&s->smb.io, s->dev.config[0xd2] & BIT(0));
  63     memory_region_transaction_commit();
  64 }
  65
  66 static int vmstate_acpi_post_load(void *opaque, int version_id)
  67 {
  68     ViaPMState *s = opaque;
  69
  70     pm_io_space_update(s);
  71     smb_io_space_update(s);
  72     return 0;
  73 }
  74
  75 static const VMStateDescription vmstate_acpi = {
  76     .name = "vt82c686b_pm",
  77     .version_id = 1,
  78     .minimum_version_id = 1,
  79     .post_load = vmstate_acpi_post_load,
  80     .fields = (VMStateField[]) {
  81         VMSTATE_PCI_DEVICE(dev, ViaPMState),
  82         VMSTATE_UINT16(ar.pm1.evt.sts, ViaPMState),
  83         VMSTATE_UINT16(ar.pm1.evt.en, ViaPMState),
  84         VMSTATE_UINT16(ar.pm1.cnt.cnt, ViaPMState),
  85         VMSTATE_STRUCT(apm, ViaPMState, 0, vmstate_apm, APMState),
  86         VMSTATE_TIMER_PTR(ar.tmr.timer, ViaPMState),
  87         VMSTATE_INT64(ar.tmr.overflow_time, ViaPMState),
  88         VMSTATE_END_OF_LIST()
  89     }
  90 };
  91
  92 static void pm_write_config(PCIDevice *d, uint32_t addr, uint32_t val, int len)
  93 {
  94     ViaPMState *s = VIA_PM(d);
  95
  96     trace_via_pm_write(addr, val, len);
  97     pci_default_write_config(d, addr, val, len);
  98     if (ranges_overlap(addr, len, 0x48, 4)) {
  99         uint32_t v = pci_get_long(s->dev.config + 0x48);
 100         pci_set_long(s->dev.config + 0x48, (v & 0xff80UL) | 1);
 101     }
 102     if (range_covers_byte(addr, len, 0x41)) {
 103         pm_io_space_update(s);
 104     }
 105     if (ranges_overlap(addr, len, 0x90, 4)) {
 106         uint32_t v = pci_get_long(s->dev.config + 0x90);
 107         pci_set_long(s->dev.config + 0x90, (v & 0xfff0UL) | 1);
 108     }
 109     if (range_covers_byte(addr, len, 0xd2)) {
 110         s->dev.config[0xd2] &= 0xf;
 111         smb_io_space_update(s);
 112     }
 113 }
 114
 115 static void pm_io_write(void *op, hwaddr addr, uint64_t data, unsigned size)
 116 {
 117     trace_via_pm_io_write(addr, data, size);
 118 }
 119
 120 static uint64_t pm_io_read(void *op, hwaddr addr, unsigned size)
 121 {
 122     trace_via_pm_io_read(addr, 0, size);
 123     return 0;
 124 }
 125
 126 static const MemoryRegionOps pm_io_ops = {
 127     .read = pm_io_read,
 128     .write = pm_io_write,
 129     .endianness = DEVICE_NATIVE_ENDIAN,
 130     .impl = {
 131         .min_access_size = 1,
 132         .max_access_size = 1,
 133     },
 134 };
 135
 136 static void pm_update_sci(ViaPMState *s)
 137 {
 138     int sci_level, pmsts;
 139
 140     pmsts = acpi_pm1_evt_get_sts(&s->ar);
 141     sci_level = (((pmsts & s->ar.pm1.evt.en) &
 142                   (ACPI_BITMASK_RT_CLOCK_ENABLE |
 143                    ACPI_BITMASK_POWER_BUTTON_ENABLE |
 144                    ACPI_BITMASK_GLOBAL_LOCK_ENABLE |
 145                    ACPI_BITMASK_TIMER_ENABLE)) != 0);
 146     pci_set_irq(&s->dev, sci_level);
 147     /* schedule a timer interruption if needed */
 148     acpi_pm_tmr_update(&s->ar, (s->ar.pm1.evt.en & ACPI_BITMASK_TIMER_ENABLE) &&
 149                        !(pmsts & ACPI_BITMASK_TIMER_STATUS));
 150 }
 151
 152 static void pm_tmr_timer(ACPIREGS *ar)
 153 {
 154     ViaPMState *s = container_of(ar, ViaPMState, ar);
 155     pm_update_sci(s);
 156 }
 157
 158 static void via_pm_reset(DeviceState *d)
 159 {
 160     ViaPMState *s = VIA_PM(d);
 161
 162     memset(s->dev.config + PCI_CONFIG_HEADER_SIZE, 0,
 163            PCI_CONFIG_SPACE_SIZE - PCI_CONFIG_HEADER_SIZE);
 164     /* Power Management IO base */
 165     pci_set_long(s->dev.config + 0x48, 1);
 166     /* SMBus IO base */
 167     pci_set_long(s->dev.config + 0x90, 1);
 168
 169     pm_io_space_update(s);
 170     smb_io_space_update(s);
 171 }
 172
 173 static void via_pm_realize(PCIDevice *dev, Error **errp)
 174 {
 175     ViaPMState *s = VIA_PM(dev);
 176
 177     pci_set_word(dev->config + PCI_STATUS, PCI_STATUS_FAST_BACK |
 178                  PCI_STATUS_DEVSEL_MEDIUM);
 179
 180     pm_smbus_init(DEVICE(s), &s->smb, false);
 181     memory_region_add_subregion(pci_address_space_io(dev), 0, &s->smb.io);
 182     memory_region_set_enabled(&s->smb.io, false);
 183
 184     apm_init(dev, &s->apm, NULL, s);
 185
 186     memory_region_init_io(&s->io, OBJECT(dev), &pm_io_ops, s, "via-pm", 128);
 187     memory_region_add_subregion(pci_address_space_io(dev), 0, &s->io);
 188     memory_region_set_enabled(&s->io, false);
 189
 190     acpi_pm_tmr_init(&s->ar, pm_tmr_timer, &s->io);
 191     acpi_pm1_evt_init(&s->ar, pm_tmr_timer, &s->io);
 192     acpi_pm1_cnt_init(&s->ar, &s->io, false, false, 2);
 193 }
 194
 195 typedef struct via_pm_init_info {
 196     uint16_t device_id;
 197 } ViaPMInitInfo;
 198
 199 static void via_pm_class_init(ObjectClass *klass, void *data)
 200 {
 201     DeviceClass *dc = DEVICE_CLASS(klass);
 202     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 203     ViaPMInitInfo *info = data;
 204
 205     k->realize = via_pm_realize;
 206     k->config_write = pm_write_config;
 207     k->vendor_id = PCI_VENDOR_ID_VIA;
 208     k->device_id = info->device_id;
 209     k->class_id = PCI_CLASS_BRIDGE_OTHER;
 210     k->revision = 0x40;
 211     dc->reset = via_pm_reset;
 212     /* Reason: part of VIA south bridge, does not exist stand alone */
 213     dc->user_creatable = false;
 214     dc->vmsd = &vmstate_acpi;
 215 }
 216
 217 static const TypeInfo via_pm_info = {
 218     .name          = TYPE_VIA_PM,
 219     .parent        = TYPE_PCI_DEVICE,
 220     .instance_size = sizeof(ViaPMState),
 221     .abstract      = true,
 222     .interfaces = (InterfaceInfo[]) {
 223         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
 224         { },
 225     },
 226 };
 227
 228 static const ViaPMInitInfo vt82c686b_pm_init_info = {
 229     .device_id = PCI_DEVICE_ID_VIA_82C686B_PM,
 230 };
 231
 232 static const TypeInfo vt82c686b_pm_info = {
 233     .name          = TYPE_VT82C686B_PM,
 234     .parent        = TYPE_VIA_PM,
 235     .class_init    = via_pm_class_init,
 236     .class_data    = (void *)&vt82c686b_pm_init_info,
 237 };
 238
 239 static const ViaPMInitInfo vt8231_pm_init_info = {
 240     .device_id = PCI_DEVICE_ID_VIA_8231_PM,
 241 };
 242
 243 static const TypeInfo vt8231_pm_info = {
 244     .name          = TYPE_VT8231_PM,
 245     .parent        = TYPE_VIA_PM,
 246     .class_init    = via_pm_class_init,
 247     .class_data    = (void *)&vt8231_pm_init_info,
 248 };
 249
 250
 251 typedef struct SuperIOConfig {
 252     uint8_t regs[0x100];
 253     MemoryRegion io;
 254 } SuperIOConfig;
 255
 256 static void superio_cfg_write(void *opaque, hwaddr addr, uint64_t data,
 257                               unsigned size)
 258 {
 259     SuperIOConfig *sc = opaque;
 260     uint8_t idx = sc->regs[0];
 261
 262     if (addr == 0x3f0) { /* config index register */
 263         idx = data & 0xff;
 264     } else {
 265         bool can_write = true;
 266         /* 0x3f1, config data register */
 267         trace_via_superio_write(idx, data & 0xff);
 268         switch (idx) {
 269         case 0x00 ... 0xdf:
 270         case 0xe4:
 271         case 0xe5:
 272         case 0xe9 ... 0xed:
 273         case 0xf3:
 274         case 0xf5:
 275         case 0xf7:
 276         case 0xf9 ... 0xfb:
 277         case 0xfd ... 0xff:
 278             can_write = false;
 279             break;
 280         /* case 0xe6 ... 0xe8: Should set base port of parallel and serial */
 281         default:
 282             break;
 283
 284         }
 285         if (can_write) {
 286             sc->regs[idx] = data & 0xff;
 287         }
 288     }
 289 }
 290
 291 static uint64_t superio_cfg_read(void *opaque, hwaddr addr, unsigned size)
 292 {
 293     SuperIOConfig *sc = opaque;
 294     uint8_t idx = sc->regs[0];
 295     uint8_t val = sc->regs[idx];
 296
 297     if (addr == 0) {
 298         return idx;
 299     }
 300     if (addr == 1 && idx == 0) {
 301         val = 0; /* reading reg 0 where we store index value */
 302     }
 303     trace_via_superio_read(idx, val);
 304     return val;
 305 }
 306
 307 static const MemoryRegionOps superio_cfg_ops = {
 308     .read = superio_cfg_read,
 309     .write = superio_cfg_write,
 310     .endianness = DEVICE_NATIVE_ENDIAN,
 311     .impl = {
 312         .min_access_size = 1,
 313         .max_access_size = 1,
 314     },
 315 };
 316
 317
 318 OBJECT_DECLARE_SIMPLE_TYPE(VT82C686BISAState, VT82C686B_ISA)
 319
 320 struct VT82C686BISAState {
 321     PCIDevice dev;
 322     qemu_irq cpu_intr;
 323     SuperIOConfig superio_cfg;
 324 };
 325
 326 static void via_isa_request_i8259_irq(void *opaque, int irq, int level)
 327 {
 328     VT82C686BISAState *s = opaque;
 329     qemu_set_irq(s->cpu_intr, level);
 330 }
 331
 332 static void vt82c686b_write_config(PCIDevice *d, uint32_t addr,
 333                                    uint32_t val, int len)
 334 {
 335     VT82C686BISAState *s = VT82C686B_ISA(d);
 336
 337     trace_via_isa_write(addr, val, len);
 338     pci_default_write_config(d, addr, val, len);
 339     if (addr == 0x85) {
 340         /* BIT(1): enable or disable superio config io ports */
 341         memory_region_set_enabled(&s->superio_cfg.io, val & BIT(1));
 342     }
 343 }
 344
 345 static const VMStateDescription vmstate_via = {
 346     .name = "vt82c686b",
 347     .version_id = 1,
 348     .minimum_version_id = 1,
 349     .fields = (VMStateField[]) {
 350         VMSTATE_PCI_DEVICE(dev, VT82C686BISAState),
 351         VMSTATE_END_OF_LIST()
 352     }
 353 };
 354
 355 static void vt82c686b_isa_reset(DeviceState *dev)
 356 {
 357     VT82C686BISAState *s = VT82C686B_ISA(dev);
 358     uint8_t *pci_conf = s->dev.config;
 359
 360     pci_set_long(pci_conf + PCI_CAPABILITY_LIST, 0x000000c0);
 361     pci_set_word(pci_conf + PCI_COMMAND, PCI_COMMAND_IO | PCI_COMMAND_MEMORY |
 362                  PCI_COMMAND_MASTER | PCI_COMMAND_SPECIAL);
 363     pci_set_word(pci_conf + PCI_STATUS, PCI_STATUS_DEVSEL_MEDIUM);
 364
 365     pci_conf[0x48] = 0x01; /* Miscellaneous Control 3 */
 366     pci_conf[0x4a] = 0x04; /* IDE interrupt Routing */
 367     pci_conf[0x4f] = 0x03; /* DMA/Master Mem Access Control 3 */
 368     pci_conf[0x50] = 0x2d; /* PnP DMA Request Control */
 369     pci_conf[0x59] = 0x04;
 370     pci_conf[0x5a] = 0x04; /* KBC/RTC Control*/
 371     pci_conf[0x5f] = 0x04;
 372     pci_conf[0x77] = 0x10; /* GPIO Control 1/2/3/4 */
 373
 374     s->superio_cfg.regs[0xe0] = 0x3c; /* Device ID */
 375     s->superio_cfg.regs[0xe2] = 0x03; /* Function select */
 376     s->superio_cfg.regs[0xe3] = 0xfc; /* Floppy ctrl base addr */
 377     s->superio_cfg.regs[0xe6] = 0xde; /* Parallel port base addr */
 378     s->superio_cfg.regs[0xe7] = 0xfe; /* Serial port 1 base addr */
 379     s->superio_cfg.regs[0xe8] = 0xbe; /* Serial port 2 base addr */
 380 }
 381
 382 static void vt82c686b_realize(PCIDevice *d, Error **errp)
 383 {
 384     VT82C686BISAState *s = VT82C686B_ISA(d);
 385     DeviceState *dev = DEVICE(d);
 386     ISABus *isa_bus;
 387     qemu_irq *isa_irq;
 388     int i;
 389
 390     qdev_init_gpio_out(dev, &s->cpu_intr, 1);
 391     isa_irq = qemu_allocate_irqs(via_isa_request_i8259_irq, s, 1);
 392     isa_bus = isa_bus_new(dev, get_system_memory(), pci_address_space_io(d),
 393                           &error_fatal);
 394     isa_bus_irqs(isa_bus, i8259_init(isa_bus, *isa_irq));
 395     i8254_pit_init(isa_bus, 0x40, 0, NULL);
 396     i8257_dma_init(isa_bus, 0);
 397     isa_create_simple(isa_bus, TYPE_VT82C686B_SUPERIO);
 398     mc146818_rtc_init(isa_bus, 2000, NULL);
 399
 400     for (i = 0; i < PCI_CONFIG_HEADER_SIZE; i++) {
 401         if (i < PCI_COMMAND || i >= PCI_REVISION_ID) {
 402             d->wmask[i] = 0;
 403         }
 404     }
 405
 406     memory_region_init_io(&s->superio_cfg.io, OBJECT(d), &superio_cfg_ops,
 407                           &s->superio_cfg, "superio_cfg", 2);
 408     memory_region_set_enabled(&s->superio_cfg.io, false);
 409     /*
 410      * The floppy also uses 0x3f0 and 0x3f1.
 411      * But we do not emulate a floppy, so just set it here.
 412      */
 413     memory_region_add_subregion(isa_bus->address_space_io, 0x3f0,
 414                                 &s->superio_cfg.io);
 415 }
 416
 417 static void via_class_init(ObjectClass *klass, void *data)
 418 {
 419     DeviceClass *dc = DEVICE_CLASS(klass);
 420     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 421
 422     k->realize = vt82c686b_realize;
 423     k->config_write = vt82c686b_write_config;
 424     k->vendor_id = PCI_VENDOR_ID_VIA;
 425     k->device_id = PCI_DEVICE_ID_VIA_ISA_BRIDGE;
 426     k->class_id = PCI_CLASS_BRIDGE_ISA;
 427     k->revision = 0x40;
 428     dc->reset = vt82c686b_isa_reset;
 429     dc->desc = "ISA bridge";
 430     dc->vmsd = &vmstate_via;
 431     /*
 432      * Reason: part of VIA VT82C686 southbridge, needs to be wired up,
 433      * e.g. by mips_fuloong2e_init()
 434      */
 435     dc->user_creatable = false;
 436 }
 437
 438 static const TypeInfo via_info = {
 439     .name          = TYPE_VT82C686B_ISA,
 440     .parent        = TYPE_PCI_DEVICE,
 441     .instance_size = sizeof(VT82C686BISAState),
 442     .class_init    = via_class_init,
 443     .interfaces = (InterfaceInfo[]) {
 444         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
 445         { },
 446     },
 447 };
 448
 449
 450 static void vt82c686b_superio_class_init(ObjectClass *klass, void *data)
 451 {
 452     ISASuperIOClass *sc = ISA_SUPERIO_CLASS(klass);
 453
 454     sc->serial.count = 2;
 455     sc->parallel.count = 1;
 456     sc->ide.count = 0;
 457     sc->floppy.count = 1;
 458 }
 459
 460 static const TypeInfo via_superio_info = {
 461     .name          = TYPE_VT82C686B_SUPERIO,
 462     .parent        = TYPE_ISA_SUPERIO,
 463     .instance_size = sizeof(ISASuperIODevice),
 464     .class_size    = sizeof(ISASuperIOClass),
 465     .class_init    = vt82c686b_superio_class_init,
 466 };
 467
 468
 469 static void vt82c686b_register_types(void)
 470 {
 471     type_register_static(&via_pm_info);
 472     type_register_static(&vt82c686b_pm_info);
 473     type_register_static(&vt8231_pm_info);
 474     type_register_static(&via_info);
 475     type_register_static(&via_superio_info);
 476 }
 477
 478 type_init(vt82c686b_register_types)