drivers/char/agp/via-agp.c

   1 /*
   2  * VIA AGPGART routines.
   3  */
   4
   5 #include <linux/types.h>
   6 #include <linux/module.h>
   7 #include <linux/pci.h>
   8 #include <linux/init.h>
   9 #include <linux/agp_backend.h>
  10 #include "agp.h"
  11
  12 static const struct pci_device_id agp_via_pci_table[];
  13
  14 #define VIA_GARTCTRL    0x80
  15 #define VIA_APSIZE      0x84
  16 #define VIA_ATTBASE     0x88
  17
  18 #define VIA_AGP3_GARTCTRL       0x90
  19 #define VIA_AGP3_APSIZE         0x94
  20 #define VIA_AGP3_ATTBASE        0x98
  21 #define VIA_AGPSEL              0xfd
  22
  23 static int via_fetch_size(void)
  24 {
  25         int i;
  26         u8 temp;
  27         struct aper_size_info_8 *values;
  28
  29         values = A_SIZE_8(agp_bridge->driver->aperture_sizes);
  30         pci_read_config_byte(agp_bridge->dev, VIA_APSIZE, &temp);
  31         for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {
  32                 if (temp == values[i].size_value) {
  33                         agp_bridge->previous_size =
  34                             agp_bridge->current_size = (void *) (values + i);
  35                         agp_bridge->aperture_size_idx = i;
  36                         return values[i].size;
  37                 }
  38         }
  39         printk(KERN_ERR PFX "Unknown aperture size from AGP bridge (0x%x)\n", temp);
  40         return 0;
  41 }
  42
  43
  44 static int via_configure(void)
  45 {
  46         struct aper_size_info_8 *current_size;
  47
  48         current_size = A_SIZE_8(agp_bridge->current_size);
  49         /* aperture size */
  50         pci_write_config_byte(agp_bridge->dev, VIA_APSIZE,
  51                               current_size->size_value);
  52         /* address to map to */
  53         agp_bridge->gart_bus_addr = pci_bus_address(agp_bridge->dev,
  54                                                     AGP_APERTURE_BAR);
  55
  56         /* GART control register */
  57         pci_write_config_dword(agp_bridge->dev, VIA_GARTCTRL, 0x0000000f);
  58
  59         /* attbase - aperture GATT base */
  60         pci_write_config_dword(agp_bridge->dev, VIA_ATTBASE,
  61                             (agp_bridge->gatt_bus_addr & 0xfffff000) | 3);
  62         return 0;
  63 }
  64
  65
  66 static void via_cleanup(void)
  67 {
  68         struct aper_size_info_8 *previous_size;
  69
  70         previous_size = A_SIZE_8(agp_bridge->previous_size);
  71         pci_write_config_byte(agp_bridge->dev, VIA_APSIZE,
  72                               previous_size->size_value);
  73         /* Do not disable by writing 0 to VIA_ATTBASE, it screws things up
  74          * during reinitialization.
  75          */
  76 }
  77
  78
  79 static void via_tlbflush(struct agp_memory *mem)
  80 {
  81         u32 temp;
  82
  83         pci_read_config_dword(agp_bridge->dev, VIA_GARTCTRL, &temp);
  84         temp |= (1<<7);
  85         pci_write_config_dword(agp_bridge->dev, VIA_GARTCTRL, temp);
  86         temp &= ~(1<<7);
  87         pci_write_config_dword(agp_bridge->dev, VIA_GARTCTRL, temp);
  88 }
  89
  90
  91 static const struct aper_size_info_8 via_generic_sizes[9] =
  92 {
  93         {256, 65536, 6, 0},
  94         {128, 32768, 5, 128},
  95         {64, 16384, 4, 192},
  96         {32, 8192, 3, 224},
  97         {16, 4096, 2, 240},
  98         {8, 2048, 1, 248},
  99         {4, 1024, 0, 252},
 100         {2, 512, 0, 254},
 101         {1, 256, 0, 255}
 102 };
 103
 104
 105 static int via_fetch_size_agp3(void)
 106 {
 107         int i;
 108         u16 temp;
 109         struct aper_size_info_16 *values;
 110
 111         values = A_SIZE_16(agp_bridge->driver->aperture_sizes);
 112         pci_read_config_word(agp_bridge->dev, VIA_AGP3_APSIZE, &temp);
 113         temp &= 0xfff;
 114
 115         for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {
 116                 if (temp == values[i].size_value) {
 117                         agp_bridge->previous_size =
 118                                 agp_bridge->current_size = (void *) (values + i);
 119                         agp_bridge->aperture_size_idx = i;
 120                         return values[i].size;
 121                 }
 122         }
 123         return 0;
 124 }
 125
 126
 127 static int via_configure_agp3(void)
 128 {
 129         u32 temp;
 130         struct aper_size_info_16 *current_size;
 131
 132         current_size = A_SIZE_16(agp_bridge->current_size);
 133
 134         /* address to map to */
 135         agp_bridge->gart_bus_addr = pci_bus_address(agp_bridge->dev,
 136                                                     AGP_APERTURE_BAR);
 137
 138         /* attbase - aperture GATT base */
 139         pci_write_config_dword(agp_bridge->dev, VIA_AGP3_ATTBASE,
 140                 agp_bridge->gatt_bus_addr & 0xfffff000);
 141
 142         /* 1. Enable GTLB in RX90<7>, all AGP aperture access needs to fetch
 143          *    translation table first.
 144          * 2. Enable AGP aperture in RX91<0>. This bit controls the enabling of the
 145          *    graphics AGP aperture for the AGP3.0 port.
 146          */
 147         pci_read_config_dword(agp_bridge->dev, VIA_AGP3_GARTCTRL, &temp);
 148         pci_write_config_dword(agp_bridge->dev, VIA_AGP3_GARTCTRL, temp | (3<<7));
 149         return 0;
 150 }
 151
 152
 153 static void via_cleanup_agp3(void)
 154 {
 155         struct aper_size_info_16 *previous_size;
 156
 157         previous_size = A_SIZE_16(agp_bridge->previous_size);
 158         pci_write_config_byte(agp_bridge->dev, VIA_APSIZE, previous_size->size_value);
 159 }
 160
 161
 162 static void via_tlbflush_agp3(struct agp_memory *mem)
 163 {
 164         u32 temp;
 165
 166         pci_read_config_dword(agp_bridge->dev, VIA_AGP3_GARTCTRL, &temp);
 167         pci_write_config_dword(agp_bridge->dev, VIA_AGP3_GARTCTRL, temp & ~(1<<7));
 168         pci_write_config_dword(agp_bridge->dev, VIA_AGP3_GARTCTRL, temp);
 169 }
 170
 171
 172 static const struct agp_bridge_driver via_agp3_driver = {
 173         .owner                  = THIS_MODULE,
 174         .aperture_sizes         = agp3_generic_sizes,
 175         .size_type              = U8_APER_SIZE,
 176         .num_aperture_sizes     = 10,
 177         .needs_scratch_page     = true,
 178         .configure              = via_configure_agp3,
 179         .fetch_size             = via_fetch_size_agp3,
 180         .cleanup                = via_cleanup_agp3,
 181         .tlb_flush              = via_tlbflush_agp3,
 182         .mask_memory            = agp_generic_mask_memory,
 183         .masks                  = NULL,
 184         .agp_enable             = agp_generic_enable,
 185         .cache_flush            = global_cache_flush,
 186         .create_gatt_table      = agp_generic_create_gatt_table,
 187         .free_gatt_table        = agp_generic_free_gatt_table,
 188         .insert_memory          = agp_generic_insert_memory,
 189         .remove_memory          = agp_generic_remove_memory,
 190         .alloc_by_type          = agp_generic_alloc_by_type,
 191         .free_by_type           = agp_generic_free_by_type,
 192         .agp_alloc_page         = agp_generic_alloc_page,
 193         .agp_alloc_pages        = agp_generic_alloc_pages,
 194         .agp_destroy_page       = agp_generic_destroy_page,
 195         .agp_destroy_pages      = agp_generic_destroy_pages,
 196         .agp_type_to_mask_type  = agp_generic_type_to_mask_type,
 197 };
 198
 199 static const struct agp_bridge_driver via_driver = {
 200         .owner                  = THIS_MODULE,
 201         .aperture_sizes         = via_generic_sizes,
 202         .size_type              = U8_APER_SIZE,
 203         .num_aperture_sizes     = 9,
 204         .needs_scratch_page     = true,
 205         .configure              = via_configure,
 206         .fetch_size             = via_fetch_size,
 207         .cleanup                = via_cleanup,
 208         .tlb_flush              = via_tlbflush,
 209         .mask_memory            = agp_generic_mask_memory,
 210         .masks                  = NULL,
 211         .agp_enable             = agp_generic_enable,
 212         .cache_flush            = global_cache_flush,
 213         .create_gatt_table      = agp_generic_create_gatt_table,
 214         .free_gatt_table        = agp_generic_free_gatt_table,
 215         .insert_memory          = agp_generic_insert_memory,
 216         .remove_memory          = agp_generic_remove_memory,
 217         .alloc_by_type          = agp_generic_alloc_by_type,
 218         .free_by_type           = agp_generic_free_by_type,
 219         .agp_alloc_page         = agp_generic_alloc_page,
 220         .agp_alloc_pages        = agp_generic_alloc_pages,
 221         .agp_destroy_page       = agp_generic_destroy_page,
 222         .agp_destroy_pages      = agp_generic_destroy_pages,
 223         .agp_type_to_mask_type  = agp_generic_type_to_mask_type,
 224 };
 225
 226 static struct agp_device_ids via_agp_device_ids[] =
 227 {
 228         {
 229                 .device_id      = PCI_DEVICE_ID_VIA_82C597_0,
 230                 .chipset_name   = "Apollo VP3",
 231         },
 232
 233         {
 234                 .device_id      = PCI_DEVICE_ID_VIA_82C598_0,
 235                 .chipset_name   = "Apollo MVP3",
 236         },
 237
 238         {
 239                 .device_id      = PCI_DEVICE_ID_VIA_8501_0,
 240                 .chipset_name   = "Apollo MVP4",
 241         },
 242
 243         /* VT8601 */
 244         {
 245                 .device_id      = PCI_DEVICE_ID_VIA_8601_0,
 246                 .chipset_name   = "Apollo ProMedia/PLE133Ta",
 247         },
 248
 249         /* VT82C693A / VT28C694T */
 250         {
 251                 .device_id      = PCI_DEVICE_ID_VIA_82C691_0,
 252                 .chipset_name   = "Apollo Pro 133",
 253         },
 254
 255         {
 256                 .device_id      = PCI_DEVICE_ID_VIA_8371_0,
 257                 .chipset_name   = "KX133",
 258         },
 259
 260         /* VT8633 */
 261         {
 262                 .device_id      = PCI_DEVICE_ID_VIA_8633_0,
 263                 .chipset_name   = "Pro 266",
 264         },
 265
 266         {
 267                 .device_id      = PCI_DEVICE_ID_VIA_XN266,
 268                 .chipset_name   = "Apollo Pro266",
 269         },
 270
 271         /* VT8361 */
 272         {
 273                 .device_id      = PCI_DEVICE_ID_VIA_8361,
 274                 .chipset_name   = "KLE133",
 275         },
 276
 277         /* VT8365 / VT8362 */
 278         {
 279                 .device_id      = PCI_DEVICE_ID_VIA_8363_0,
 280                 .chipset_name   = "Twister-K/KT133x/KM133",
 281         },
 282
 283         /* VT8753A */
 284         {
 285                 .device_id      = PCI_DEVICE_ID_VIA_8753_0,
 286                 .chipset_name   = "P4X266",
 287         },
 288
 289         /* VT8366 */
 290         {
 291                 .device_id      = PCI_DEVICE_ID_VIA_8367_0,
 292                 .chipset_name   = "KT266/KY266x/KT333",
 293         },
 294
 295         /* VT8633 (for CuMine/ Celeron) */
 296         {
 297                 .device_id      = PCI_DEVICE_ID_VIA_8653_0,
 298                 .chipset_name   = "Pro266T",
 299         },
 300
 301         /* KM266 / PM266 */
 302         {
 303                 .device_id      = PCI_DEVICE_ID_VIA_XM266,
 304                 .chipset_name   = "PM266/KM266",
 305         },
 306
 307         /* CLE266 */
 308         {
 309                 .device_id      = PCI_DEVICE_ID_VIA_862X_0,
 310                 .chipset_name   = "CLE266",
 311         },
 312
 313         {
 314                 .device_id      = PCI_DEVICE_ID_VIA_8377_0,
 315                 .chipset_name   = "KT400/KT400A/KT600",
 316         },
 317
 318         /* VT8604 / VT8605 / VT8603
 319          * (Apollo Pro133A chipset with S3 Savage4) */
 320         {
 321                 .device_id      = PCI_DEVICE_ID_VIA_8605_0,
 322                 .chipset_name   = "ProSavage PM133/PL133/PN133"
 323         },
 324
 325         /* P4M266x/P4N266 */
 326         {
 327                 .device_id      = PCI_DEVICE_ID_VIA_8703_51_0,
 328                 .chipset_name   = "P4M266x/P4N266",
 329         },
 330
 331         /* VT8754 */
 332         {
 333                 .device_id      = PCI_DEVICE_ID_VIA_8754C_0,
 334                 .chipset_name   = "PT800",
 335         },
 336
 337         /* P4X600 */
 338         {
 339                 .device_id      = PCI_DEVICE_ID_VIA_8763_0,
 340                 .chipset_name   = "P4X600"
 341         },
 342
 343         /* KM400 */
 344         {
 345                 .device_id      = PCI_DEVICE_ID_VIA_8378_0,
 346                 .chipset_name   = "KM400/KM400A",
 347         },
 348
 349         /* PT880 */
 350         {
 351                 .device_id      = PCI_DEVICE_ID_VIA_PT880,
 352                 .chipset_name   = "PT880",
 353         },
 354
 355         /* PT880 Ultra */
 356         {
 357                 .device_id      = PCI_DEVICE_ID_VIA_PT880ULTRA,
 358                 .chipset_name   = "PT880 Ultra",
 359         },
 360
 361         /* PT890 */
 362         {
 363                 .device_id      = PCI_DEVICE_ID_VIA_8783_0,
 364                 .chipset_name   = "PT890",
 365         },
 366
 367         /* PM800/PN800/PM880/PN880 */
 368         {
 369                 .device_id      = PCI_DEVICE_ID_VIA_PX8X0_0,
 370                 .chipset_name   = "PM800/PN800/PM880/PN880",
 371         },
 372         /* KT880 */
 373         {
 374                 .device_id      = PCI_DEVICE_ID_VIA_3269_0,
 375                 .chipset_name   = "KT880",
 376         },
 377         /* KTxxx/Px8xx */
 378         {
 379                 .device_id      = PCI_DEVICE_ID_VIA_83_87XX_1,
 380                 .chipset_name   = "VT83xx/VT87xx/KTxxx/Px8xx",
 381         },
 382         /* P4M800 */
 383         {
 384                 .device_id      = PCI_DEVICE_ID_VIA_3296_0,
 385                 .chipset_name   = "P4M800",
 386         },
 387         /* P4M800CE */
 388         {
 389                 .device_id      = PCI_DEVICE_ID_VIA_P4M800CE,
 390                 .chipset_name   = "VT3314",
 391         },
 392         /* VT3324 / CX700 */
 393         {
 394                 .device_id  = PCI_DEVICE_ID_VIA_VT3324,
 395                 .chipset_name   = "CX700",
 396         },
 397         /* VT3336 - this is a chipset for AMD Athlon/K8 CPU. Due to K8's unique
 398          * architecture, the AGP resource and behavior are different from
 399          * the traditional AGP which resides only in chipset. AGP is used
 400          * by 3D driver which wasn't available for the VT3336 and VT3364
 401          * generation until now.  Unfortunately, by testing, VT3364 works
 402          * but VT3336 doesn't. - explanation from via, just leave this as
 403          * as a placeholder to avoid future patches adding it back in.
 404          */
 405 #if 0
 406         {
 407                 .device_id  = PCI_DEVICE_ID_VIA_VT3336,
 408                 .chipset_name   = "VT3336",
 409         },
 410 #endif
 411         /* P4M890 */
 412         {
 413                 .device_id  = PCI_DEVICE_ID_VIA_P4M890,
 414                 .chipset_name   = "P4M890",
 415         },
 416         /* P4M900 */
 417         {
 418                 .device_id  = PCI_DEVICE_ID_VIA_VT3364,
 419                 .chipset_name   = "P4M900",
 420         },
 421         { }, /* dummy final entry, always present */
 422 };
 423
 424
 425 /*
 426  * VIA's AGP3 chipsets do magick to put the AGP bridge compliant
 427  * with the same standards version as the graphics card.
 428  */
 429 static void check_via_agp3 (struct agp_bridge_data *bridge)
 430 {
 431         u8 reg;
 432
 433         pci_read_config_byte(bridge->dev, VIA_AGPSEL, &reg);
 434         /* Check AGP 2.0 compatibility mode. */
 435         if ((reg & (1<<1))==0)
 436                 bridge->driver = &via_agp3_driver;
 437 }
 438
 439
 440 static int agp_via_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 441 {
 442         struct agp_device_ids *devs = via_agp_device_ids;
 443         struct agp_bridge_data *bridge;
 444         int j = 0;
 445         u8 cap_ptr;
 446
 447         cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
 448         if (!cap_ptr)
 449                 return -ENODEV;
 450
 451         j = ent - agp_via_pci_table;
 452         printk (KERN_INFO PFX "Detected VIA %s chipset\n", devs[j].chipset_name);
 453
 454         bridge = agp_alloc_bridge();
 455         if (!bridge)
 456                 return -ENOMEM;
 457
 458         bridge->dev = pdev;
 459         bridge->capndx = cap_ptr;
 460         bridge->driver = &via_driver;
 461
 462         /*
 463          * Garg, there are KT400s with KT266 IDs.
 464          */
 465         if (pdev->device == PCI_DEVICE_ID_VIA_8367_0) {
 466                 /* Is there a KT400 subsystem ? */
 467                 if (pdev->subsystem_device == PCI_DEVICE_ID_VIA_8377_0) {
 468                         printk(KERN_INFO PFX "Found KT400 in disguise as a KT266.\n");
 469                         check_via_agp3(bridge);
 470                 }
 471         }
 472
 473         /* If this is an AGP3 bridge, check which mode its in and adjust. */
 474         get_agp_version(bridge);
 475         if (bridge->major_version >= 3)
 476                 check_via_agp3(bridge);
 477
 478         /* Fill in the mode register */
 479         pci_read_config_dword(pdev,
 480                         bridge->capndx+PCI_AGP_STATUS, &bridge->mode);
 481
 482         pci_set_drvdata(pdev, bridge);
 483         return agp_add_bridge(bridge);
 484 }
 485
 486 static void agp_via_remove(struct pci_dev *pdev)
 487 {
 488         struct agp_bridge_data *bridge = pci_get_drvdata(pdev);
 489
 490         agp_remove_bridge(bridge);
 491         agp_put_bridge(bridge);
 492 }
 493
 494 #ifdef CONFIG_PM
 495
 496 static int agp_via_suspend(struct pci_dev *pdev, pm_message_t state)
 497 {
 498         pci_save_state (pdev);
 499         pci_set_power_state (pdev, PCI_D3hot);
 500
 501         return 0;
 502 }
 503
 504 static int agp_via_resume(struct pci_dev *pdev)
 505 {
 506         struct agp_bridge_data *bridge = pci_get_drvdata(pdev);
 507
 508         pci_set_power_state (pdev, PCI_D0);
 509         pci_restore_state(pdev);
 510
 511         if (bridge->driver == &via_agp3_driver)
 512                 return via_configure_agp3();
 513         else if (bridge->driver == &via_driver)
 514                 return via_configure();
 515
 516         return 0;
 517 }
 518
 519 #endif /* CONFIG_PM */
 520
 521 /* must be the same order as name table above */
 522 static const struct pci_device_id agp_via_pci_table[] = {
 523 #define ID(x) \
 524         {                                               \
 525         .class          = (PCI_CLASS_BRIDGE_HOST << 8), \
 526         .class_mask     = ~0,                           \
 527         .vendor         = PCI_VENDOR_ID_VIA,            \
 528         .device         = x,                            \
 529         .subvendor      = PCI_ANY_ID,                   \
 530         .subdevice      = PCI_ANY_ID,                   \
 531         }
 532         ID(PCI_DEVICE_ID_VIA_82C597_0),
 533         ID(PCI_DEVICE_ID_VIA_82C598_0),
 534         ID(PCI_DEVICE_ID_VIA_8501_0),
 535         ID(PCI_DEVICE_ID_VIA_8601_0),
 536         ID(PCI_DEVICE_ID_VIA_82C691_0),
 537         ID(PCI_DEVICE_ID_VIA_8371_0),
 538         ID(PCI_DEVICE_ID_VIA_8633_0),
 539         ID(PCI_DEVICE_ID_VIA_XN266),
 540         ID(PCI_DEVICE_ID_VIA_8361),
 541         ID(PCI_DEVICE_ID_VIA_8363_0),
 542         ID(PCI_DEVICE_ID_VIA_8753_0),
 543         ID(PCI_DEVICE_ID_VIA_8367_0),
 544         ID(PCI_DEVICE_ID_VIA_8653_0),
 545         ID(PCI_DEVICE_ID_VIA_XM266),
 546         ID(PCI_DEVICE_ID_VIA_862X_0),
 547         ID(PCI_DEVICE_ID_VIA_8377_0),
 548         ID(PCI_DEVICE_ID_VIA_8605_0),
 549         ID(PCI_DEVICE_ID_VIA_8703_51_0),
 550         ID(PCI_DEVICE_ID_VIA_8754C_0),
 551         ID(PCI_DEVICE_ID_VIA_8763_0),
 552         ID(PCI_DEVICE_ID_VIA_8378_0),
 553         ID(PCI_DEVICE_ID_VIA_PT880),
 554         ID(PCI_DEVICE_ID_VIA_PT880ULTRA),
 555         ID(PCI_DEVICE_ID_VIA_8783_0),
 556         ID(PCI_DEVICE_ID_VIA_PX8X0_0),
 557         ID(PCI_DEVICE_ID_VIA_3269_0),
 558         ID(PCI_DEVICE_ID_VIA_83_87XX_1),
 559         ID(PCI_DEVICE_ID_VIA_3296_0),
 560         ID(PCI_DEVICE_ID_VIA_P4M800CE),
 561         ID(PCI_DEVICE_ID_VIA_VT3324),
 562         ID(PCI_DEVICE_ID_VIA_P4M890),
 563         ID(PCI_DEVICE_ID_VIA_VT3364),
 564         { }
 565 };
 566
 567 MODULE_DEVICE_TABLE(pci, agp_via_pci_table);
 568
 569
 570 static struct pci_driver agp_via_pci_driver = {
 571         .name           = "agpgart-via",
 572         .id_table       = agp_via_pci_table,
 573         .probe          = agp_via_probe,
 574         .remove         = agp_via_remove,
 575 #ifdef CONFIG_PM
 576         .suspend        = agp_via_suspend,
 577         .resume         = agp_via_resume,
 578 #endif
 579 };
 580
 581
 582 static int __init agp_via_init(void)
 583 {
 584         if (agp_off)
 585                 return -EINVAL;
 586         return pci_register_driver(&agp_via_pci_driver);
 587 }
 588
 589 static void __exit agp_via_cleanup(void)
 590 {
 591         pci_unregister_driver(&agp_via_pci_driver);
 592 }
 593
 594 module_init(agp_via_init);
 595 module_exit(agp_via_cleanup);
 596
 597 MODULE_LICENSE("GPL");
 598 MODULE_AUTHOR("Dave Jones");