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 #define VIA_GARTCTRL    0x80
  13 #define VIA_APSIZE      0x84
  14 #define VIA_ATTBASE     0x88
  15
  16 #define VIA_AGP3_GARTCTRL       0x90
  17 #define VIA_AGP3_APSIZE         0x94
  18 #define VIA_AGP3_ATTBASE        0x98
  19 #define VIA_AGPSEL              0xfd
  20
  21 static int via_fetch_size(void)
  22 {
  23         int i;
  24         u8 temp;
  25         struct aper_size_info_8 *values;
  26
  27         values = A_SIZE_8(agp_bridge->driver->aperture_sizes);
  28         pci_read_config_byte(agp_bridge->dev, VIA_APSIZE, &temp);
  29         for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {
  30                 if (temp == values[i].size_value) {
  31                         agp_bridge->previous_size =
  32                             agp_bridge->current_size = (void *) (values + i);
  33                         agp_bridge->aperture_size_idx = i;
  34                         return values[i].size;
  35                 }
  36         }
  37         return 0;
  38 }
  39
  40
  41 static int via_configure(void)
  42 {
  43         u32 temp;
  44         struct aper_size_info_8 *current_size;
  45
  46         current_size = A_SIZE_8(agp_bridge->current_size);
  47         /* aperture size */
  48         pci_write_config_byte(agp_bridge->dev, VIA_APSIZE,
  49                               current_size->size_value);
  50         /* address to map too */
  51         pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
  52         agp_bridge->gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
  53
  54         /* GART control register */
  55         pci_write_config_dword(agp_bridge->dev, VIA_GARTCTRL, 0x0000000f);
  56
  57         /* attbase - aperture GATT base */
  58         pci_write_config_dword(agp_bridge->dev, VIA_ATTBASE,
  59                             (agp_bridge->gatt_bus_addr & 0xfffff000) | 3);
  60         return 0;
  61 }
  62
  63
  64 static void via_cleanup(void)
  65 {
  66         struct aper_size_info_8 *previous_size;
  67
  68         previous_size = A_SIZE_8(agp_bridge->previous_size);
  69         pci_write_config_byte(agp_bridge->dev, VIA_APSIZE,
  70                               previous_size->size_value);
  71         /* Do not disable by writing 0 to VIA_ATTBASE, it screws things up
  72          * during reinitialization.
  73          */
  74 }
  75
  76
  77 static void via_tlbflush(struct agp_memory *mem)
  78 {
  79         pci_write_config_dword(agp_bridge->dev, VIA_GARTCTRL, 0x0000008f);
  80         pci_write_config_dword(agp_bridge->dev, VIA_GARTCTRL, 0x0000000f);
  81 }
  82
  83
  84 static struct aper_size_info_8 via_generic_sizes[7] =
  85 {
  86         {256, 65536, 6, 0},
  87         {128, 32768, 5, 128},
  88         {64, 16384, 4, 192},
  89         {32, 8192, 3, 224},
  90         {16, 4096, 2, 240},
  91         {8, 2048, 1, 248},
  92         {4, 1024, 0, 252}
  93 };
  94
  95
  96 static int via_fetch_size_agp3(void)
  97 {
  98         int i;
  99         u16 temp;
 100         struct aper_size_info_16 *values;
 101
 102         values = A_SIZE_16(agp_bridge->driver->aperture_sizes);
 103         pci_read_config_word(agp_bridge->dev, VIA_AGP3_APSIZE, &temp);
 104         temp &= 0xfff;
 105
 106         for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {
 107                 if (temp == values[i].size_value) {
 108                         agp_bridge->previous_size =
 109                                 agp_bridge->current_size = (void *) (values + i);
 110                         agp_bridge->aperture_size_idx = i;
 111                         return values[i].size;
 112                 }
 113         }
 114         return 0;
 115 }
 116
 117
 118 static int via_configure_agp3(void)
 119 {
 120         u32 temp;
 121         struct aper_size_info_16 *current_size;
 122
 123         current_size = A_SIZE_16(agp_bridge->current_size);
 124
 125         /* address to map too */
 126         pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
 127         agp_bridge->gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
 128
 129         /* attbase - aperture GATT base */
 130         pci_write_config_dword(agp_bridge->dev, VIA_AGP3_ATTBASE,
 131                 agp_bridge->gatt_bus_addr & 0xfffff000);
 132
 133         /* 1. Enable GTLB in RX90<7>, all AGP aperture access needs to fetch
 134          *    translation table first.
 135          * 2. Enable AGP aperture in RX91<0>. This bit controls the enabling of the
 136          *    graphics AGP aperture for the AGP3.0 port.
 137          */
 138         pci_read_config_dword(agp_bridge->dev, VIA_AGP3_GARTCTRL, &temp);
 139         pci_write_config_dword(agp_bridge->dev, VIA_AGP3_GARTCTRL, temp | (3<<7));
 140         return 0;
 141 }
 142
 143
 144 static void via_cleanup_agp3(void)
 145 {
 146         struct aper_size_info_16 *previous_size;
 147
 148         previous_size = A_SIZE_16(agp_bridge->previous_size);
 149         pci_write_config_byte(agp_bridge->dev, VIA_APSIZE, previous_size->size_value);
 150 }
 151
 152
 153 static void via_tlbflush_agp3(struct agp_memory *mem)
 154 {
 155         u32 temp;
 156
 157         pci_read_config_dword(agp_bridge->dev, VIA_AGP3_GARTCTRL, &temp);
 158         pci_write_config_dword(agp_bridge->dev, VIA_AGP3_GARTCTRL, temp & ~(1<<7));
 159         pci_write_config_dword(agp_bridge->dev, VIA_AGP3_GARTCTRL, temp);
 160 }
 161
 162
 163 struct agp_bridge_driver via_agp3_driver = {
 164         .owner                  = THIS_MODULE,
 165         .aperture_sizes         = agp3_generic_sizes,
 166         .size_type              = U8_APER_SIZE,
 167         .num_aperture_sizes     = 10,
 168         .configure              = via_configure_agp3,
 169         .fetch_size             = via_fetch_size_agp3,
 170         .cleanup                = via_cleanup_agp3,
 171         .tlb_flush              = via_tlbflush_agp3,
 172         .mask_memory            = agp_generic_mask_memory,
 173         .masks                  = NULL,
 174         .agp_enable             = agp_generic_enable,
 175         .cache_flush            = global_cache_flush,
 176         .create_gatt_table      = agp_generic_create_gatt_table,
 177         .free_gatt_table        = agp_generic_free_gatt_table,
 178         .insert_memory          = agp_generic_insert_memory,
 179         .remove_memory          = agp_generic_remove_memory,
 180         .alloc_by_type          = agp_generic_alloc_by_type,
 181         .free_by_type           = agp_generic_free_by_type,
 182         .agp_alloc_page         = agp_generic_alloc_page,
 183         .agp_destroy_page       = agp_generic_destroy_page,
 184 };
 185
 186 struct agp_bridge_driver via_driver = {
 187         .owner                  = THIS_MODULE,
 188         .aperture_sizes         = via_generic_sizes,
 189         .size_type              = U8_APER_SIZE,
 190         .num_aperture_sizes     = 7,
 191         .configure              = via_configure,
 192         .fetch_size             = via_fetch_size,
 193         .cleanup                = via_cleanup,
 194         .tlb_flush              = via_tlbflush,
 195         .mask_memory            = agp_generic_mask_memory,
 196         .masks                  = NULL,
 197         .agp_enable             = agp_generic_enable,
 198         .cache_flush            = global_cache_flush,
 199         .create_gatt_table      = agp_generic_create_gatt_table,
 200         .free_gatt_table        = agp_generic_free_gatt_table,
 201         .insert_memory          = agp_generic_insert_memory,
 202         .remove_memory          = agp_generic_remove_memory,
 203         .alloc_by_type          = agp_generic_alloc_by_type,
 204         .free_by_type           = agp_generic_free_by_type,
 205         .agp_alloc_page         = agp_generic_alloc_page,
 206         .agp_destroy_page       = agp_generic_destroy_page,
 207 };
 208
 209 static struct agp_device_ids via_agp_device_ids[] __devinitdata =
 210 {
 211         {
 212                 .device_id      = PCI_DEVICE_ID_VIA_82C597_0,
 213                 .chipset_name   = "Apollo VP3",
 214         },
 215
 216         {
 217                 .device_id      = PCI_DEVICE_ID_VIA_82C598_0,
 218                 .chipset_name   = "Apollo MVP3",
 219         },
 220
 221         {
 222                 .device_id      = PCI_DEVICE_ID_VIA_8501_0,
 223                 .chipset_name   = "Apollo MVP4",
 224         },
 225
 226         /* VT8601 */
 227         {
 228                 .device_id      = PCI_DEVICE_ID_VIA_8601_0,
 229                 .chipset_name   = "Apollo ProMedia/PLE133Ta",
 230         },
 231
 232         /* VT82C693A / VT28C694T */
 233         {
 234                 .device_id      = PCI_DEVICE_ID_VIA_82C691_0,
 235                 .chipset_name   = "Apollo Pro 133",
 236         },
 237
 238         {
 239                 .device_id      = PCI_DEVICE_ID_VIA_8371_0,
 240                 .chipset_name   = "KX133",
 241         },
 242
 243         /* VT8633 */
 244         {
 245                 .device_id      = PCI_DEVICE_ID_VIA_8633_0,
 246                 .chipset_name   = "Pro 266",
 247         },
 248
 249         {
 250                 .device_id      = PCI_DEVICE_ID_VIA_XN266,
 251                 .chipset_name   = "Apollo Pro266",
 252         },
 253
 254         /* VT8361 */
 255         {
 256                 .device_id      = PCI_DEVICE_ID_VIA_8361,
 257                 .chipset_name   = "KLE133",
 258         },
 259
 260         /* VT8365 / VT8362 */
 261         {
 262                 .device_id      = PCI_DEVICE_ID_VIA_8363_0,
 263                 .chipset_name   = "Twister-K/KT133x/KM133",
 264         },
 265
 266         /* VT8753A */
 267         {
 268                 .device_id      = PCI_DEVICE_ID_VIA_8753_0,
 269                 .chipset_name   = "P4X266",
 270         },
 271
 272         /* VT8366 */
 273         {
 274                 .device_id      = PCI_DEVICE_ID_VIA_8367_0,
 275                 .chipset_name   = "KT266/KY266x/KT333",
 276         },
 277
 278         /* VT8633 (for CuMine/ Celeron) */
 279         {
 280                 .device_id      = PCI_DEVICE_ID_VIA_8653_0,
 281                 .chipset_name   = "Pro266T",
 282         },
 283
 284         /* KM266 / PM266 */
 285         {
 286                 .device_id      = PCI_DEVICE_ID_VIA_XM266,
 287                 .chipset_name   = "PM266/KM266",
 288         },
 289
 290         /* CLE266 */
 291         {
 292                 .device_id      = PCI_DEVICE_ID_VIA_862X_0,
 293                 .chipset_name   = "CLE266",
 294         },
 295
 296         {
 297                 .device_id      = PCI_DEVICE_ID_VIA_8377_0,
 298                 .chipset_name   = "KT400/KT400A/KT600",
 299         },
 300
 301         /* VT8604 / VT8605 / VT8603
 302          * (Apollo Pro133A chipset with S3 Savage4) */
 303         {
 304                 .device_id      = PCI_DEVICE_ID_VIA_8605_0,
 305                 .chipset_name   = "ProSavage PM133/PL133/PN133"
 306         },
 307
 308         /* P4M266x/P4N266 */
 309         {
 310                 .device_id      = PCI_DEVICE_ID_VIA_8703_51_0,
 311                 .chipset_name   = "P4M266x/P4N266",
 312         },
 313
 314         /* VT8754 */
 315         {
 316                 .device_id      = PCI_DEVICE_ID_VIA_8754C_0,
 317                 .chipset_name   = "PT800",
 318         },
 319
 320         /* P4X600 */
 321         {
 322                 .device_id      = PCI_DEVICE_ID_VIA_8763_0,
 323                 .chipset_name   = "P4X600"
 324         },
 325
 326         /* KM400 */
 327         {
 328                 .device_id      = PCI_DEVICE_ID_VIA_8378_0,
 329                 .chipset_name   = "KM400/KM400A",
 330         },
 331
 332         /* PT880 */
 333         {
 334                 .device_id      = PCI_DEVICE_ID_VIA_PT880,
 335                 .chipset_name   = "PT880",
 336         },
 337
 338         /* PT890 */
 339         {
 340                 .device_id      = PCI_DEVICE_ID_VIA_8783_0,
 341                 .chipset_name   = "PT890",
 342         },
 343
 344         /* PM800/PN800/PM880/PN880 */
 345         {
 346                 .device_id      = PCI_DEVICE_ID_VIA_PX8X0_0,
 347                 .chipset_name   = "PM800/PN800/PM880/PN880",
 348         },
 349
 350         { }, /* dummy final entry, always present */
 351 };
 352
 353
 354 /*
 355  * VIA's AGP3 chipsets do magick to put the AGP bridge compliant
 356  * with the same standards version as the graphics card.
 357  */
 358 static void check_via_agp3 (struct agp_bridge_data *bridge)
 359 {
 360         u8 reg;
 361
 362         pci_read_config_byte(bridge->dev, VIA_AGPSEL, &reg);
 363         /* Check AGP 2.0 compatibility mode. */
 364         if ((reg & (1<<1))==0)
 365                 bridge->driver = &via_agp3_driver;
 366 }
 367
 368
 369 static int __devinit agp_via_probe(struct pci_dev *pdev,
 370                                    const struct pci_device_id *ent)
 371 {
 372         struct agp_device_ids *devs = via_agp_device_ids;
 373         struct agp_bridge_data *bridge;
 374         int j = 0;
 375         u8 cap_ptr;
 376
 377         cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
 378         if (!cap_ptr)
 379                 return -ENODEV;
 380
 381         /* probe for known chipsets */
 382         for (j = 0; devs[j].chipset_name; j++) {
 383                 if (pdev->device == devs[j].device_id) {
 384                         printk (KERN_INFO PFX "Detected VIA %s chipset\n",
 385                                         devs[j].chipset_name);
 386                         goto found;
 387                 }
 388         }
 389
 390         printk(KERN_ERR PFX "Unsupported VIA chipset (device id: %04x)\n",
 391                     pdev->device);
 392         return -ENODEV;
 393
 394 found:
 395         bridge = agp_alloc_bridge();
 396         if (!bridge)
 397                 return -ENOMEM;
 398
 399         bridge->dev = pdev;
 400         bridge->capndx = cap_ptr;
 401         bridge->driver = &via_driver;
 402
 403         /*
 404          * Garg, there are KT400s with KT266 IDs.
 405          */
 406         if (pdev->device == PCI_DEVICE_ID_VIA_8367_0) {
 407                 /* Is there a KT400 subsystem ? */
 408                 if (pdev->subsystem_device == PCI_DEVICE_ID_VIA_8377_0) {
 409                         printk(KERN_INFO PFX "Found KT400 in disguise as a KT266.\n");
 410                         check_via_agp3(bridge);
 411                 }
 412         }
 413
 414         /* If this is an AGP3 bridge, check which mode its in and adjust. */
 415         get_agp_version(bridge);
 416         if (bridge->major_version >= 3)
 417                 check_via_agp3(bridge);
 418
 419         /* Fill in the mode register */
 420         pci_read_config_dword(pdev,
 421                         bridge->capndx+PCI_AGP_STATUS, &bridge->mode);
 422
 423         pci_set_drvdata(pdev, bridge);
 424         return agp_add_bridge(bridge);
 425 }
 426
 427 static void __devexit agp_via_remove(struct pci_dev *pdev)
 428 {
 429         struct agp_bridge_data *bridge = pci_get_drvdata(pdev);
 430
 431         agp_remove_bridge(bridge);
 432         agp_put_bridge(bridge);
 433 }
 434
 435 static struct pci_device_id agp_via_pci_table[] = {
 436         {
 437         .class          = (PCI_CLASS_BRIDGE_HOST << 8),
 438         .class_mask     = ~0,
 439         .vendor         = PCI_VENDOR_ID_VIA,
 440         .device         = PCI_ANY_ID,
 441         .subvendor      = PCI_ANY_ID,
 442         .subdevice      = PCI_ANY_ID,
 443         },
 444         { }
 445 };
 446
 447 MODULE_DEVICE_TABLE(pci, agp_via_pci_table);
 448
 449
 450 static struct pci_driver agp_via_pci_driver = {
 451         .name           = "agpgart-via",
 452         .id_table       = agp_via_pci_table,
 453         .probe          = agp_via_probe,
 454         .remove         = agp_via_remove,
 455 };
 456
 457
 458 static int __init agp_via_init(void)
 459 {
 460         return pci_module_init(&agp_via_pci_driver);
 461 }
 462
 463 static void __exit agp_via_cleanup(void)
 464 {
 465         pci_unregister_driver(&agp_via_pci_driver);
 466 }
 467
 468 module_init(agp_via_init);
 469 module_exit(agp_via_cleanup);
 470
 471 MODULE_LICENSE("GPL and additional rights");
 472 MODULE_AUTHOR("Dave Jones <davej@codemonkey.org.uk>");