git.oblomov.eu Git - linux-2.6/blob - drivers/char/agp/uninorth-agp.c

   1 /*
   2  * UniNorth AGPGART routines.
   3  */
   4 #include <linux/module.h>
   5 #include <linux/pci.h>
   6 #include <linux/init.h>
   7 #include <linux/pagemap.h>
   8 #include <linux/agp_backend.h>
   9 #include <linux/delay.h>
  10 #include <asm/uninorth.h>
  11 #include <asm/pci-bridge.h>
  12 #include <asm/prom.h>
  13 #include <asm/pmac_feature.h>
  14 #include "agp.h"
  15
  16 /*
  17  * NOTES for uninorth3 (G5 AGP) supports :
  18  *
  19  * There maybe also possibility to have bigger cache line size for
  20  * agp (see pmac_pci.c and look for cache line). Need to be investigated
  21  * by someone.
  22  *
  23  * PAGE size are hardcoded but this may change, see asm/page.h.
  24  *
  25  * Jerome Glisse <j.glisse@gmail.com>
  26  */
  27 static int uninorth_rev;
  28 static int is_u3;
  29
  30
  31 static int uninorth_fetch_size(void)
  32 {
  33         int i;
  34         u32 temp;
  35         struct aper_size_info_32 *values;
  36
  37         pci_read_config_dword(agp_bridge->dev, UNI_N_CFG_GART_BASE, &temp);
  38         temp &= ~(0xfffff000);
  39         values = A_SIZE_32(agp_bridge->driver->aperture_sizes);
  40
  41         for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {
  42                 if (temp == values[i].size_value) {
  43                         agp_bridge->previous_size =
  44                             agp_bridge->current_size = (void *) (values + i);
  45                         agp_bridge->aperture_size_idx = i;
  46                         return values[i].size;
  47                 }
  48         }
  49
  50         agp_bridge->previous_size =
  51             agp_bridge->current_size = (void *) (values + 1);
  52         agp_bridge->aperture_size_idx = 1;
  53         return values[1].size;
  54
  55         return 0;
  56 }
  57
  58 static void uninorth_tlbflush(struct agp_memory *mem)
  59 {
  60         u32 ctrl = UNI_N_CFG_GART_ENABLE;
  61
  62         if (is_u3)
  63                 ctrl |= U3_N_CFG_GART_PERFRD;
  64         pci_write_config_dword(agp_bridge->dev, UNI_N_CFG_GART_CTRL,
  65                                ctrl | UNI_N_CFG_GART_INVAL);
  66         pci_write_config_dword(agp_bridge->dev, UNI_N_CFG_GART_CTRL, ctrl);
  67
  68         if (uninorth_rev <= 0x30) {
  69                 pci_write_config_dword(agp_bridge->dev, UNI_N_CFG_GART_CTRL,
  70                                        ctrl | UNI_N_CFG_GART_2xRESET);
  71                 pci_write_config_dword(agp_bridge->dev, UNI_N_CFG_GART_CTRL,
  72                                        ctrl);
  73         }
  74 }
  75
  76 static void uninorth_cleanup(void)
  77 {
  78         u32 tmp;
  79
  80         pci_read_config_dword(agp_bridge->dev, UNI_N_CFG_GART_CTRL, &tmp);
  81         if (!(tmp & UNI_N_CFG_GART_ENABLE))
  82                 return;
  83         tmp |= UNI_N_CFG_GART_INVAL;
  84         pci_write_config_dword(agp_bridge->dev, UNI_N_CFG_GART_CTRL, tmp);
  85         pci_write_config_dword(agp_bridge->dev, UNI_N_CFG_GART_CTRL, 0);
  86
  87         if (uninorth_rev <= 0x30) {
  88                 pci_write_config_dword(agp_bridge->dev, UNI_N_CFG_GART_CTRL,
  89                                        UNI_N_CFG_GART_2xRESET);
  90                 pci_write_config_dword(agp_bridge->dev, UNI_N_CFG_GART_CTRL,
  91                                        0);
  92         }
  93 }
  94
  95 static int uninorth_configure(void)
  96 {
  97         struct aper_size_info_32 *current_size;
  98
  99         current_size = A_SIZE_32(agp_bridge->current_size);
 100
 101         printk(KERN_INFO PFX "configuring for size idx: %d\n",
 102                current_size->size_value);
 103
 104         /* aperture size and gatt addr */
 105         pci_write_config_dword(agp_bridge->dev,
 106                 UNI_N_CFG_GART_BASE,
 107                 (agp_bridge->gatt_bus_addr & 0xfffff000)
 108                         | current_size->size_value);
 109
 110         /* HACK ALERT
 111          * UniNorth seem to be buggy enough not to handle properly when
 112          * the AGP aperture isn't mapped at bus physical address 0
 113          */
 114         agp_bridge->gart_bus_addr = 0;
 115 #ifdef CONFIG_PPC64
 116         /* Assume U3 or later on PPC64 systems */
 117         /* high 4 bits of GART physical address go in UNI_N_CFG_AGP_BASE */
 118         pci_write_config_dword(agp_bridge->dev, UNI_N_CFG_AGP_BASE,
 119                                (agp_bridge->gatt_bus_addr >> 32) & 0xf);
 120 #else
 121         pci_write_config_dword(agp_bridge->dev,
 122                 UNI_N_CFG_AGP_BASE, agp_bridge->gart_bus_addr);
 123 #endif
 124
 125         if (is_u3) {
 126                 pci_write_config_dword(agp_bridge->dev,
 127                                        UNI_N_CFG_GART_DUMMY_PAGE,
 128                                        agp_bridge->scratch_page_real >> 12);
 129         }
 130
 131         return 0;
 132 }
 133
 134 static int uninorth_insert_memory(struct agp_memory *mem, off_t pg_start,
 135                                 int type)
 136 {
 137         int i, j, num_entries;
 138         void *temp;
 139
 140         temp = agp_bridge->current_size;
 141         num_entries = A_SIZE_32(temp)->num_entries;
 142
 143         if (type != 0 || mem->type != 0)
 144                 /* We know nothing of memory types */
 145                 return -EINVAL;
 146         if ((pg_start + mem->page_count) > num_entries)
 147                 return -EINVAL;
 148
 149         j = pg_start;
 150
 151         while (j < (pg_start + mem->page_count)) {
 152                 if (agp_bridge->gatt_table[j])
 153                         return -EBUSY;
 154                 j++;
 155         }
 156
 157         for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
 158                 agp_bridge->gatt_table[j] =
 159                     cpu_to_le32((mem->memory[i] & 0xFFFFF000UL) | 0x1UL);
 160                 flush_dcache_range((unsigned long)__va(mem->memory[i]),
 161                                    (unsigned long)__va(mem->memory[i])+0x1000);
 162         }
 163         (void)in_le32((volatile u32*)&agp_bridge->gatt_table[pg_start]);
 164         mb();
 165         flush_dcache_range((unsigned long)&agp_bridge->gatt_table[pg_start],
 166                 (unsigned long)&agp_bridge->gatt_table[pg_start + mem->page_count]);
 167
 168         uninorth_tlbflush(mem);
 169         return 0;
 170 }
 171
 172 static int u3_insert_memory(struct agp_memory *mem, off_t pg_start, int type)
 173 {
 174         int i, num_entries;
 175         void *temp;
 176         u32 *gp;
 177
 178         temp = agp_bridge->current_size;
 179         num_entries = A_SIZE_32(temp)->num_entries;
 180
 181         if (type != 0 || mem->type != 0)
 182                 /* We know nothing of memory types */
 183                 return -EINVAL;
 184         if ((pg_start + mem->page_count) > num_entries)
 185                 return -EINVAL;
 186
 187         gp = (u32 *) &agp_bridge->gatt_table[pg_start];
 188         for (i = 0; i < mem->page_count; ++i) {
 189                 if (gp[i]) {
 190                         printk("u3_insert_memory: entry 0x%x occupied (%x)\n",
 191                                i, gp[i]);
 192                         return -EBUSY;
 193                 }
 194         }
 195
 196         for (i = 0; i < mem->page_count; i++) {
 197                 gp[i] = (mem->memory[i] >> PAGE_SHIFT) | 0x80000000UL;
 198                 flush_dcache_range((unsigned long)__va(mem->memory[i]),
 199                                    (unsigned long)__va(mem->memory[i])+0x1000);
 200         }
 201         mb();
 202         flush_dcache_range((unsigned long)gp, (unsigned long) &gp[i]);
 203         uninorth_tlbflush(mem);
 204
 205         return 0;
 206 }
 207
 208 int u3_remove_memory(struct agp_memory *mem, off_t pg_start, int type)
 209 {
 210         size_t i;
 211         u32 *gp;
 212
 213         if (type != 0 || mem->type != 0)
 214                 /* We know nothing of memory types */
 215                 return -EINVAL;
 216
 217         gp = (u32 *) &agp_bridge->gatt_table[pg_start];
 218         for (i = 0; i < mem->page_count; ++i)
 219                 gp[i] = 0;
 220         mb();
 221         flush_dcache_range((unsigned long)gp, (unsigned long) &gp[i]);
 222         uninorth_tlbflush(mem);
 223
 224         return 0;
 225 }
 226
 227 static void uninorth_agp_enable(struct agp_bridge_data *bridge, u32 mode)
 228 {
 229         u32 command, scratch, status;
 230         int timeout;
 231
 232         pci_read_config_dword(bridge->dev,
 233                               bridge->capndx + PCI_AGP_STATUS,
 234                               &status);
 235
 236         command = agp_collect_device_status(bridge, mode, status);
 237         command |= PCI_AGP_COMMAND_AGP;
 238
 239         if (uninorth_rev == 0x21) {
 240                 /*
 241                  * Darwin disable AGP 4x on this revision, thus we
 242                  * may assume it's broken. This is an AGP2 controller.
 243                  */
 244                 command &= ~AGPSTAT2_4X;
 245         }
 246
 247         if ((uninorth_rev >= 0x30) && (uninorth_rev <= 0x33)) {
 248                 /*
 249                  * We need to to set REQ_DEPTH to 7 for U3 versions 1.0, 2.1,
 250                  * 2.2 and 2.3, Darwin do so.
 251                  */
 252                 if ((command >> AGPSTAT_RQ_DEPTH_SHIFT) > 7)
 253                         command = (command & ~AGPSTAT_RQ_DEPTH)
 254                                 | (7 << AGPSTAT_RQ_DEPTH_SHIFT);
 255         }
 256
 257         uninorth_tlbflush(NULL);
 258
 259         timeout = 0;
 260         do {
 261                 pci_write_config_dword(bridge->dev,
 262                                        bridge->capndx + PCI_AGP_COMMAND,
 263                                        command);
 264                 pci_read_config_dword(bridge->dev,
 265                                       bridge->capndx + PCI_AGP_COMMAND,
 266                                        &scratch);
 267         } while ((scratch & PCI_AGP_COMMAND_AGP) == 0 && ++timeout < 1000);
 268         if ((scratch & PCI_AGP_COMMAND_AGP) == 0)
 269                 printk(KERN_ERR PFX "failed to write UniNorth AGP"
 270                        " command register\n");
 271
 272         if (uninorth_rev >= 0x30) {
 273                 /* This is an AGP V3 */
 274                 agp_device_command(command, (status & AGPSTAT_MODE_3_0));
 275         } else {
 276                 /* AGP V2 */
 277                 agp_device_command(command, 0);
 278         }
 279
 280         uninorth_tlbflush(NULL);
 281 }
 282
 283 #ifdef CONFIG_PM
 284 /*
 285  * These Power Management routines are _not_ called by the normal PCI PM layer,
 286  * but directly by the video driver through function pointers in the device
 287  * tree.
 288  */
 289 static int agp_uninorth_suspend(struct pci_dev *pdev)
 290 {
 291         struct agp_bridge_data *bridge;
 292         u32 cmd;
 293         u8 agp;
 294         struct pci_dev *device = NULL;
 295
 296         bridge = agp_find_bridge(pdev);
 297         if (bridge == NULL)
 298                 return -ENODEV;
 299
 300         /* Only one suspend supported */
 301         if (bridge->dev_private_data)
 302                 return 0;
 303
 304         /* turn off AGP on the video chip, if it was enabled */
 305         for_each_pci_dev(device) {
 306                 /* Don't touch the bridge yet, device first */
 307                 if (device == pdev)
 308                         continue;
 309                 /* Only deal with devices on the same bus here, no Mac has a P2P
 310                  * bridge on the AGP port, and mucking around the entire PCI
 311                  * tree is source of problems on some machines because of a bug
 312                  * in some versions of pci_find_capability() when hitting a dead
 313                  * device
 314                  */
 315                 if (device->bus != pdev->bus)
 316                         continue;
 317                 agp = pci_find_capability(device, PCI_CAP_ID_AGP);
 318                 if (!agp)
 319                         continue;
 320                 pci_read_config_dword(device, agp + PCI_AGP_COMMAND, &cmd);
 321                 if (!(cmd & PCI_AGP_COMMAND_AGP))
 322                         continue;
 323                 printk("uninorth-agp: disabling AGP on device %s\n",
 324                                 pci_name(device));
 325                 cmd &= ~PCI_AGP_COMMAND_AGP;
 326                 pci_write_config_dword(device, agp + PCI_AGP_COMMAND, cmd);
 327         }
 328
 329         /* turn off AGP on the bridge */
 330         agp = pci_find_capability(pdev, PCI_CAP_ID_AGP);
 331         pci_read_config_dword(pdev, agp + PCI_AGP_COMMAND, &cmd);
 332         bridge->dev_private_data = (void *)cmd;
 333         if (cmd & PCI_AGP_COMMAND_AGP) {
 334                 printk("uninorth-agp: disabling AGP on bridge %s\n",
 335                                 pci_name(pdev));
 336                 cmd &= ~PCI_AGP_COMMAND_AGP;
 337                 pci_write_config_dword(pdev, agp + PCI_AGP_COMMAND, cmd);
 338         }
 339         /* turn off the GART */
 340         uninorth_cleanup();
 341
 342         return 0;
 343 }
 344
 345 static int agp_uninorth_resume(struct pci_dev *pdev)
 346 {
 347         struct agp_bridge_data *bridge;
 348         u32 command;
 349
 350         bridge = agp_find_bridge(pdev);
 351         if (bridge == NULL)
 352                 return -ENODEV;
 353
 354         command = (u32)bridge->dev_private_data;
 355         bridge->dev_private_data = NULL;
 356         if (!(command & PCI_AGP_COMMAND_AGP))
 357                 return 0;
 358
 359         uninorth_agp_enable(bridge, command);
 360
 361         return 0;
 362 }
 363 #endif /* CONFIG_PM */
 364
 365 static int uninorth_create_gatt_table(struct agp_bridge_data *bridge)
 366 {
 367         char *table;
 368         char *table_end;
 369         int size;
 370         int page_order;
 371         int num_entries;
 372         int i;
 373         void *temp;
 374         struct page *page;
 375
 376         /* We can't handle 2 level gatt's */
 377         if (bridge->driver->size_type == LVL2_APER_SIZE)
 378                 return -EINVAL;
 379
 380         table = NULL;
 381         i = bridge->aperture_size_idx;
 382         temp = bridge->current_size;
 383         size = page_order = num_entries = 0;
 384
 385         do {
 386                 size = A_SIZE_32(temp)->size;
 387                 page_order = A_SIZE_32(temp)->page_order;
 388                 num_entries = A_SIZE_32(temp)->num_entries;
 389
 390                 table = (char *) __get_free_pages(GFP_KERNEL, page_order);
 391
 392                 if (table == NULL) {
 393                         i++;
 394                         bridge->current_size = A_IDX32(bridge);
 395                 } else {
 396                         bridge->aperture_size_idx = i;
 397                 }
 398         } while (!table && (i < bridge->driver->num_aperture_sizes));
 399
 400         if (table == NULL)
 401                 return -ENOMEM;
 402
 403         table_end = table + ((PAGE_SIZE * (1 << page_order)) - 1);
 404
 405         for (page = virt_to_page(table); page <= virt_to_page(table_end); page++)
 406                 SetPageReserved(page);
 407
 408         bridge->gatt_table_real = (u32 *) table;
 409         bridge->gatt_table = (u32 *)table;
 410         bridge->gatt_bus_addr = virt_to_gart(table);
 411
 412         for (i = 0; i < num_entries; i++)
 413                 bridge->gatt_table[i] = 0;
 414
 415         flush_dcache_range((unsigned long)table, (unsigned long)table_end);
 416
 417         return 0;
 418 }
 419
 420 static int uninorth_free_gatt_table(struct agp_bridge_data *bridge)
 421 {
 422         int page_order;
 423         char *table, *table_end;
 424         void *temp;
 425         struct page *page;
 426
 427         temp = bridge->current_size;
 428         page_order = A_SIZE_32(temp)->page_order;
 429
 430         /* Do not worry about freeing memory, because if this is
 431          * called, then all agp memory is deallocated and removed
 432          * from the table.
 433          */
 434
 435         table = (char *) bridge->gatt_table_real;
 436         table_end = table + ((PAGE_SIZE * (1 << page_order)) - 1);
 437
 438         for (page = virt_to_page(table); page <= virt_to_page(table_end); page++)
 439                 ClearPageReserved(page);
 440
 441         free_pages((unsigned long) bridge->gatt_table_real, page_order);
 442
 443         return 0;
 444 }
 445
 446 void null_cache_flush(void)
 447 {
 448         mb();
 449 }
 450
 451 /* Setup function */
 452
 453 static struct aper_size_info_32 uninorth_sizes[7] =
 454 {
 455 #if 0 /* Not sure uninorth supports that high aperture sizes */
 456         {256, 65536, 6, 64},
 457         {128, 32768, 5, 32},
 458         {64, 16384, 4, 16},
 459 #endif
 460         {32, 8192, 3, 8},
 461         {16, 4096, 2, 4},
 462         {8, 2048, 1, 2},
 463         {4, 1024, 0, 1}
 464 };
 465
 466 /*
 467  * Not sure that u3 supports that high aperture sizes but it
 468  * would strange if it did not :)
 469  */
 470 static struct aper_size_info_32 u3_sizes[8] =
 471 {
 472         {512, 131072, 7, 128},
 473         {256, 65536, 6, 64},
 474         {128, 32768, 5, 32},
 475         {64, 16384, 4, 16},
 476         {32, 8192, 3, 8},
 477         {16, 4096, 2, 4},
 478         {8, 2048, 1, 2},
 479         {4, 1024, 0, 1}
 480 };
 481
 482 struct agp_bridge_driver uninorth_agp_driver = {
 483         .owner                  = THIS_MODULE,
 484         .aperture_sizes         = (void *)uninorth_sizes,
 485         .size_type              = U32_APER_SIZE,
 486         .num_aperture_sizes     = 4,
 487         .configure              = uninorth_configure,
 488         .fetch_size             = uninorth_fetch_size,
 489         .cleanup                = uninorth_cleanup,
 490         .tlb_flush              = uninorth_tlbflush,
 491         .mask_memory            = agp_generic_mask_memory,
 492         .masks                  = NULL,
 493         .cache_flush            = null_cache_flush,
 494         .agp_enable             = uninorth_agp_enable,
 495         .create_gatt_table      = uninorth_create_gatt_table,
 496         .free_gatt_table        = uninorth_free_gatt_table,
 497         .insert_memory          = uninorth_insert_memory,
 498         .remove_memory          = agp_generic_remove_memory,
 499         .alloc_by_type          = agp_generic_alloc_by_type,
 500         .free_by_type           = agp_generic_free_by_type,
 501         .agp_alloc_page         = agp_generic_alloc_page,
 502         .agp_destroy_page       = agp_generic_destroy_page,
 503         .cant_use_aperture      = 1,
 504 };
 505
 506 struct agp_bridge_driver u3_agp_driver = {
 507         .owner                  = THIS_MODULE,
 508         .aperture_sizes         = (void *)u3_sizes,
 509         .size_type              = U32_APER_SIZE,
 510         .num_aperture_sizes     = 8,
 511         .configure              = uninorth_configure,
 512         .fetch_size             = uninorth_fetch_size,
 513         .cleanup                = uninorth_cleanup,
 514         .tlb_flush              = uninorth_tlbflush,
 515         .mask_memory            = agp_generic_mask_memory,
 516         .masks                  = NULL,
 517         .cache_flush            = null_cache_flush,
 518         .agp_enable             = uninorth_agp_enable,
 519         .create_gatt_table      = uninorth_create_gatt_table,
 520         .free_gatt_table        = uninorth_free_gatt_table,
 521         .insert_memory          = u3_insert_memory,
 522         .remove_memory          = u3_remove_memory,
 523         .alloc_by_type          = agp_generic_alloc_by_type,
 524         .free_by_type           = agp_generic_free_by_type,
 525         .agp_alloc_page         = agp_generic_alloc_page,
 526         .agp_destroy_page       = agp_generic_destroy_page,
 527         .cant_use_aperture      = 1,
 528         .needs_scratch_page     = 1,
 529 };
 530
 531 static struct agp_device_ids uninorth_agp_device_ids[] __devinitdata = {
 532         {
 533                 .device_id      = PCI_DEVICE_ID_APPLE_UNI_N_AGP,
 534                 .chipset_name   = "UniNorth",
 535         },
 536         {
 537                 .device_id      = PCI_DEVICE_ID_APPLE_UNI_N_AGP_P,
 538                 .chipset_name   = "UniNorth/Pangea",
 539         },
 540         {
 541                 .device_id      = PCI_DEVICE_ID_APPLE_UNI_N_AGP15,
 542                 .chipset_name   = "UniNorth 1.5",
 543         },
 544         {
 545                 .device_id      = PCI_DEVICE_ID_APPLE_UNI_N_AGP2,
 546                 .chipset_name   = "UniNorth 2",
 547         },
 548         {
 549                 .device_id      = PCI_DEVICE_ID_APPLE_U3_AGP,
 550                 .chipset_name   = "U3",
 551         },
 552         {
 553                 .device_id      = PCI_DEVICE_ID_APPLE_U3L_AGP,
 554                 .chipset_name   = "U3L",
 555         },
 556         {
 557                 .device_id      = PCI_DEVICE_ID_APPLE_U3H_AGP,
 558                 .chipset_name   = "U3H",
 559         },
 560 };
 561
 562 static int __devinit agp_uninorth_probe(struct pci_dev *pdev,
 563                                         const struct pci_device_id *ent)
 564 {
 565         struct agp_device_ids *devs = uninorth_agp_device_ids;
 566         struct agp_bridge_data *bridge;
 567         struct device_node *uninorth_node;
 568         u8 cap_ptr;
 569         int j;
 570
 571         cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
 572         if (cap_ptr == 0)
 573                 return -ENODEV;
 574
 575         /* probe for known chipsets */
 576         for (j = 0; devs[j].chipset_name != NULL; ++j) {
 577                 if (pdev->device == devs[j].device_id) {
 578                         printk(KERN_INFO PFX "Detected Apple %s chipset\n",
 579                                devs[j].chipset_name);
 580                         goto found;
 581                 }
 582         }
 583
 584         printk(KERN_ERR PFX "Unsupported Apple chipset (device id: %04x).\n",
 585                 pdev->device);
 586         return -ENODEV;
 587
 588  found:
 589         /* Set revision to 0 if we could not read it. */
 590         uninorth_rev = 0;
 591         is_u3 = 0;
 592         /* Locate core99 Uni-N */
 593         uninorth_node = of_find_node_by_name(NULL, "uni-n");
 594         /* Locate G5 u3 */
 595         if (uninorth_node == NULL) {
 596                 is_u3 = 1;
 597                 uninorth_node = of_find_node_by_name(NULL, "u3");
 598         }
 599         if (uninorth_node) {
 600                 int *revprop = (int *)
 601                         get_property(uninorth_node, "device-rev", NULL);
 602                 if (revprop != NULL)
 603                         uninorth_rev = *revprop & 0x3f;
 604                 of_node_put(uninorth_node);
 605         }
 606
 607 #ifdef CONFIG_PM
 608         /* Inform platform of our suspend/resume caps */
 609         pmac_register_agp_pm(pdev, agp_uninorth_suspend, agp_uninorth_resume);
 610 #endif
 611
 612         /* Allocate & setup our driver */
 613         bridge = agp_alloc_bridge();
 614         if (!bridge)
 615                 return -ENOMEM;
 616
 617         if (is_u3)
 618                 bridge->driver = &u3_agp_driver;
 619         else
 620                 bridge->driver = &uninorth_agp_driver;
 621
 622         bridge->dev = pdev;
 623         bridge->capndx = cap_ptr;
 624         bridge->flags = AGP_ERRATA_FASTWRITES;
 625
 626         /* Fill in the mode register */
 627         pci_read_config_dword(pdev, cap_ptr+PCI_AGP_STATUS, &bridge->mode);
 628
 629         pci_set_drvdata(pdev, bridge);
 630         return agp_add_bridge(bridge);
 631 }
 632
 633 static void __devexit agp_uninorth_remove(struct pci_dev *pdev)
 634 {
 635         struct agp_bridge_data *bridge = pci_get_drvdata(pdev);
 636
 637 #ifdef CONFIG_PM
 638         /* Inform platform of our suspend/resume caps */
 639         pmac_register_agp_pm(pdev, NULL, NULL);
 640 #endif
 641
 642         agp_remove_bridge(bridge);
 643         agp_put_bridge(bridge);
 644 }
 645
 646 static struct pci_device_id agp_uninorth_pci_table[] = {
 647         {
 648         .class          = (PCI_CLASS_BRIDGE_HOST << 8),
 649         .class_mask     = ~0,
 650         .vendor         = PCI_VENDOR_ID_APPLE,
 651         .device         = PCI_ANY_ID,
 652         .subvendor      = PCI_ANY_ID,
 653         .subdevice      = PCI_ANY_ID,
 654         },
 655         { }
 656 };
 657
 658 MODULE_DEVICE_TABLE(pci, agp_uninorth_pci_table);
 659
 660 static struct pci_driver agp_uninorth_pci_driver = {
 661         .name           = "agpgart-uninorth",
 662         .id_table       = agp_uninorth_pci_table,
 663         .probe          = agp_uninorth_probe,
 664         .remove         = agp_uninorth_remove,
 665 };
 666
 667 static int __init agp_uninorth_init(void)
 668 {
 669         if (agp_off)
 670                 return -EINVAL;
 671         return pci_register_driver(&agp_uninorth_pci_driver);
 672 }
 673
 674 static void __exit agp_uninorth_cleanup(void)
 675 {
 676         pci_unregister_driver(&agp_uninorth_pci_driver);
 677 }
 678
 679 module_init(agp_uninorth_init);
 680 module_exit(agp_uninorth_cleanup);
 681
 682 MODULE_AUTHOR("Ben Herrenschmidt & Paul Mackerras");
 683 MODULE_LICENSE("GPL");