drivers/char/agp/ali-agp.c

   1 /*
   2  * ALi 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 <asm/page.h>           /* PAGE_SIZE */
  11 #include "agp.h"
  12
  13 #define ALI_AGPCTRL     0xb8
  14 #define ALI_ATTBASE     0xbc
  15 #define ALI_TLBCTRL     0xc0
  16 #define ALI_TAGCTRL     0xc4
  17 #define ALI_CACHE_FLUSH_CTRL    0xD0
  18 #define ALI_CACHE_FLUSH_ADDR_MASK       0xFFFFF000
  19 #define ALI_CACHE_FLUSH_EN      0x100
  20
  21 static int ali_fetch_size(void)
  22 {
  23         int i;
  24         u32 temp;
  25         struct aper_size_info_32 *values;
  26
  27         pci_read_config_dword(agp_bridge->dev, ALI_ATTBASE, &temp);
  28         temp &= ~(0xfffffff0);
  29         values = A_SIZE_32(agp_bridge->driver->aperture_sizes);
  30
  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
  40         return 0;
  41 }
  42
  43 static void ali_tlbflush(struct agp_memory *mem)
  44 {
  45         u32 temp;
  46
  47         pci_read_config_dword(agp_bridge->dev, ALI_TLBCTRL, &temp);
  48         temp &= 0xfffffff0;
  49         temp |= (1<<0 | 1<<1);
  50         pci_write_config_dword(agp_bridge->dev, ALI_TAGCTRL, temp);
  51 }
  52
  53 static void ali_cleanup(void)
  54 {
  55         struct aper_size_info_32 *previous_size;
  56         u32 temp;
  57
  58         previous_size = A_SIZE_32(agp_bridge->previous_size);
  59
  60         pci_read_config_dword(agp_bridge->dev, ALI_TLBCTRL, &temp);
  61 // clear tag
  62         pci_write_config_dword(agp_bridge->dev, ALI_TAGCTRL,
  63                         ((temp & 0xffffff00) | 0x00000001|0x00000002));
  64
  65         pci_read_config_dword(agp_bridge->dev,  ALI_ATTBASE, &temp);
  66         pci_write_config_dword(agp_bridge->dev, ALI_ATTBASE,
  67                         ((temp & 0x00000ff0) | previous_size->size_value));
  68 }
  69
  70 static int ali_configure(void)
  71 {
  72         u32 temp;
  73         struct aper_size_info_32 *current_size;
  74
  75         current_size = A_SIZE_32(agp_bridge->current_size);
  76
  77         /* aperture size and gatt addr */
  78         pci_read_config_dword(agp_bridge->dev, ALI_ATTBASE, &temp);
  79         temp = (((temp & 0x00000ff0) | (agp_bridge->gatt_bus_addr & 0xfffff000))
  80                         | (current_size->size_value & 0xf));
  81         pci_write_config_dword(agp_bridge->dev, ALI_ATTBASE, temp);
  82
  83         /* tlb control */
  84         pci_read_config_dword(agp_bridge->dev, ALI_TLBCTRL, &temp);
  85         pci_write_config_dword(agp_bridge->dev, ALI_TLBCTRL, ((temp & 0xffffff00) | 0x00000010));
  86
  87         /* address to map to */
  88         agp_bridge->gart_bus_addr = pci_bus_address(agp_bridge->dev,
  89                                                     AGP_APERTURE_BAR);
  90
  91 #if 0
  92         if (agp_bridge->type == ALI_M1541) {
  93                 u32 nlvm_addr = 0;
  94
  95                 switch (current_size->size_value) {
  96                         case 0:  break;
  97                         case 1:  nlvm_addr = 0x100000;break;
  98                         case 2:  nlvm_addr = 0x200000;break;
  99                         case 3:  nlvm_addr = 0x400000;break;
 100                         case 4:  nlvm_addr = 0x800000;break;
 101                         case 6:  nlvm_addr = 0x1000000;break;
 102                         case 7:  nlvm_addr = 0x2000000;break;
 103                         case 8:  nlvm_addr = 0x4000000;break;
 104                         case 9:  nlvm_addr = 0x8000000;break;
 105                         case 10: nlvm_addr = 0x10000000;break;
 106                         default: break;
 107                 }
 108                 nlvm_addr--;
 109                 nlvm_addr&=0xfff00000;
 110
 111                 nlvm_addr+= agp_bridge->gart_bus_addr;
 112                 nlvm_addr|=(agp_bridge->gart_bus_addr>>12);
 113                 dev_info(&agp_bridge->dev->dev, "nlvm top &base = %8x\n",
 114                          nlvm_addr);
 115         }
 116 #endif
 117
 118         pci_read_config_dword(agp_bridge->dev, ALI_TLBCTRL, &temp);
 119         temp &= 0xffffff7f;             //enable TLB
 120         pci_write_config_dword(agp_bridge->dev, ALI_TLBCTRL, temp);
 121
 122         return 0;
 123 }
 124
 125
 126 static void m1541_cache_flush(void)
 127 {
 128         int i, page_count;
 129         u32 temp;
 130
 131         global_cache_flush();
 132
 133         page_count = 1 << A_SIZE_32(agp_bridge->current_size)->page_order;
 134         for (i = 0; i < PAGE_SIZE * page_count; i += PAGE_SIZE) {
 135                 pci_read_config_dword(agp_bridge->dev, ALI_CACHE_FLUSH_CTRL,
 136                                 &temp);
 137                 pci_write_config_dword(agp_bridge->dev, ALI_CACHE_FLUSH_CTRL,
 138                                 (((temp & ALI_CACHE_FLUSH_ADDR_MASK) |
 139                                   (agp_bridge->gatt_bus_addr + i)) |
 140                                  ALI_CACHE_FLUSH_EN));
 141         }
 142 }
 143
 144 static struct page *m1541_alloc_page(struct agp_bridge_data *bridge)
 145 {
 146         struct page *page = agp_generic_alloc_page(agp_bridge);
 147         u32 temp;
 148
 149         if (!page)
 150                 return NULL;
 151
 152         pci_read_config_dword(agp_bridge->dev, ALI_CACHE_FLUSH_CTRL, &temp);
 153         pci_write_config_dword(agp_bridge->dev, ALI_CACHE_FLUSH_CTRL,
 154                         (((temp & ALI_CACHE_FLUSH_ADDR_MASK) |
 155                           page_to_phys(page)) | ALI_CACHE_FLUSH_EN ));
 156         return page;
 157 }
 158
 159 static void ali_destroy_page(struct page *page, int flags)
 160 {
 161         if (page) {
 162                 if (flags & AGP_PAGE_DESTROY_UNMAP) {
 163                         global_cache_flush();   /* is this really needed?  --hch */
 164                         agp_generic_destroy_page(page, flags);
 165                 } else
 166                         agp_generic_destroy_page(page, flags);
 167         }
 168 }
 169
 170 static void m1541_destroy_page(struct page *page, int flags)
 171 {
 172         u32 temp;
 173
 174         if (page == NULL)
 175                 return;
 176
 177         if (flags & AGP_PAGE_DESTROY_UNMAP) {
 178                 global_cache_flush();
 179
 180                 pci_read_config_dword(agp_bridge->dev, ALI_CACHE_FLUSH_CTRL, &temp);
 181                 pci_write_config_dword(agp_bridge->dev, ALI_CACHE_FLUSH_CTRL,
 182                                        (((temp & ALI_CACHE_FLUSH_ADDR_MASK) |
 183                                          page_to_phys(page)) | ALI_CACHE_FLUSH_EN));
 184         }
 185         agp_generic_destroy_page(page, flags);
 186 }
 187
 188
 189 /* Setup function */
 190
 191 static const struct aper_size_info_32 ali_generic_sizes[7] =
 192 {
 193         {256, 65536, 6, 10},
 194         {128, 32768, 5, 9},
 195         {64, 16384, 4, 8},
 196         {32, 8192, 3, 7},
 197         {16, 4096, 2, 6},
 198         {8, 2048, 1, 4},
 199         {4, 1024, 0, 3}
 200 };
 201
 202 static const struct agp_bridge_driver ali_generic_bridge = {
 203         .owner                  = THIS_MODULE,
 204         .aperture_sizes         = ali_generic_sizes,
 205         .size_type              = U32_APER_SIZE,
 206         .num_aperture_sizes     = 7,
 207         .needs_scratch_page     = true,
 208         .configure              = ali_configure,
 209         .fetch_size             = ali_fetch_size,
 210         .cleanup                = ali_cleanup,
 211         .tlb_flush              = ali_tlbflush,
 212         .mask_memory            = agp_generic_mask_memory,
 213         .masks                  = NULL,
 214         .agp_enable             = agp_generic_enable,
 215         .cache_flush            = global_cache_flush,
 216         .create_gatt_table      = agp_generic_create_gatt_table,
 217         .free_gatt_table        = agp_generic_free_gatt_table,
 218         .insert_memory          = agp_generic_insert_memory,
 219         .remove_memory          = agp_generic_remove_memory,
 220         .alloc_by_type          = agp_generic_alloc_by_type,
 221         .free_by_type           = agp_generic_free_by_type,
 222         .agp_alloc_page         = agp_generic_alloc_page,
 223         .agp_destroy_page       = ali_destroy_page,
 224         .agp_type_to_mask_type  = agp_generic_type_to_mask_type,
 225 };
 226
 227 static const struct agp_bridge_driver ali_m1541_bridge = {
 228         .owner                  = THIS_MODULE,
 229         .aperture_sizes         = ali_generic_sizes,
 230         .size_type              = U32_APER_SIZE,
 231         .num_aperture_sizes     = 7,
 232         .configure              = ali_configure,
 233         .fetch_size             = ali_fetch_size,
 234         .cleanup                = ali_cleanup,
 235         .tlb_flush              = ali_tlbflush,
 236         .mask_memory            = agp_generic_mask_memory,
 237         .masks                  = NULL,
 238         .agp_enable             = agp_generic_enable,
 239         .cache_flush            = m1541_cache_flush,
 240         .create_gatt_table      = agp_generic_create_gatt_table,
 241         .free_gatt_table        = agp_generic_free_gatt_table,
 242         .insert_memory          = agp_generic_insert_memory,
 243         .remove_memory          = agp_generic_remove_memory,
 244         .alloc_by_type          = agp_generic_alloc_by_type,
 245         .free_by_type           = agp_generic_free_by_type,
 246         .agp_alloc_page         = m1541_alloc_page,
 247         .agp_destroy_page       = m1541_destroy_page,
 248         .agp_type_to_mask_type  = agp_generic_type_to_mask_type,
 249 };
 250
 251
 252 static struct agp_device_ids ali_agp_device_ids[] =
 253 {
 254         {
 255                 .device_id      = PCI_DEVICE_ID_AL_M1541,
 256                 .chipset_name   = "M1541",
 257         },
 258         {
 259                 .device_id      = PCI_DEVICE_ID_AL_M1621,
 260                 .chipset_name   = "M1621",
 261         },
 262         {
 263                 .device_id      = PCI_DEVICE_ID_AL_M1631,
 264                 .chipset_name   = "M1631",
 265         },
 266         {
 267                 .device_id      = PCI_DEVICE_ID_AL_M1632,
 268                 .chipset_name   = "M1632",
 269         },
 270         {
 271                 .device_id      = PCI_DEVICE_ID_AL_M1641,
 272                 .chipset_name   = "M1641",
 273         },
 274         {
 275                 .device_id      = PCI_DEVICE_ID_AL_M1644,
 276                 .chipset_name   = "M1644",
 277         },
 278         {
 279                 .device_id      = PCI_DEVICE_ID_AL_M1647,
 280                 .chipset_name   = "M1647",
 281         },
 282         {
 283                 .device_id      = PCI_DEVICE_ID_AL_M1651,
 284                 .chipset_name   = "M1651",
 285         },
 286         {
 287                 .device_id      = PCI_DEVICE_ID_AL_M1671,
 288                 .chipset_name   = "M1671",
 289         },
 290         {
 291                 .device_id      = PCI_DEVICE_ID_AL_M1681,
 292                 .chipset_name   = "M1681",
 293         },
 294         {
 295                 .device_id      = PCI_DEVICE_ID_AL_M1683,
 296                 .chipset_name   = "M1683",
 297         },
 298
 299         { }, /* dummy final entry, always present */
 300 };
 301
 302 static int agp_ali_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 303 {
 304         struct agp_device_ids *devs = ali_agp_device_ids;
 305         struct agp_bridge_data *bridge;
 306         u8 hidden_1621_id, cap_ptr;
 307         int j;
 308
 309         cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
 310         if (!cap_ptr)
 311                 return -ENODEV;
 312
 313         /* probe for known chipsets */
 314         for (j = 0; devs[j].chipset_name; j++) {
 315                 if (pdev->device == devs[j].device_id)
 316                         goto found;
 317         }
 318
 319         dev_err(&pdev->dev, "unsupported ALi chipset [%04x/%04x])\n",
 320                 pdev->vendor, pdev->device);
 321         return -ENODEV;
 322
 323
 324 found:
 325         bridge = agp_alloc_bridge();
 326         if (!bridge)
 327                 return -ENOMEM;
 328
 329         bridge->dev = pdev;
 330         bridge->capndx = cap_ptr;
 331
 332         switch (pdev->device) {
 333         case PCI_DEVICE_ID_AL_M1541:
 334                 bridge->driver = &ali_m1541_bridge;
 335                 break;
 336         case PCI_DEVICE_ID_AL_M1621:
 337                 pci_read_config_byte(pdev, 0xFB, &hidden_1621_id);
 338                 switch (hidden_1621_id) {
 339                 case 0x31:
 340                         devs[j].chipset_name = "M1631";
 341                         break;
 342                 case 0x32:
 343                         devs[j].chipset_name = "M1632";
 344                         break;
 345                 case 0x41:
 346                         devs[j].chipset_name = "M1641";
 347                         break;
 348                 case 0x43:
 349                         devs[j].chipset_name = "M1621";
 350                         break;
 351                 case 0x47:
 352                         devs[j].chipset_name = "M1647";
 353                         break;
 354                 case 0x51:
 355                         devs[j].chipset_name = "M1651";
 356                         break;
 357                 default:
 358                         break;
 359                 }
 360                 /*FALLTHROUGH*/
 361         default:
 362                 bridge->driver = &ali_generic_bridge;
 363         }
 364
 365         dev_info(&pdev->dev, "ALi %s chipset\n", devs[j].chipset_name);
 366
 367         /* Fill in the mode register */
 368         pci_read_config_dword(pdev,
 369                         bridge->capndx+PCI_AGP_STATUS,
 370                         &bridge->mode);
 371
 372         pci_set_drvdata(pdev, bridge);
 373         return agp_add_bridge(bridge);
 374 }
 375
 376 static void agp_ali_remove(struct pci_dev *pdev)
 377 {
 378         struct agp_bridge_data *bridge = pci_get_drvdata(pdev);
 379
 380         agp_remove_bridge(bridge);
 381         agp_put_bridge(bridge);
 382 }
 383
 384 static const struct pci_device_id agp_ali_pci_table[] = {
 385         {
 386         .class          = (PCI_CLASS_BRIDGE_HOST << 8),
 387         .class_mask     = ~0,
 388         .vendor         = PCI_VENDOR_ID_AL,
 389         .device         = PCI_ANY_ID,
 390         .subvendor      = PCI_ANY_ID,
 391         .subdevice      = PCI_ANY_ID,
 392         },
 393         { }
 394 };
 395
 396 MODULE_DEVICE_TABLE(pci, agp_ali_pci_table);
 397
 398 static struct pci_driver agp_ali_pci_driver = {
 399         .name           = "agpgart-ali",
 400         .id_table       = agp_ali_pci_table,
 401         .probe          = agp_ali_probe,
 402         .remove         = agp_ali_remove,
 403 };
 404
 405 static int __init agp_ali_init(void)
 406 {
 407         if (agp_off)
 408                 return -EINVAL;
 409         return pci_register_driver(&agp_ali_pci_driver);
 410 }
 411
 412 static void __exit agp_ali_cleanup(void)
 413 {
 414         pci_unregister_driver(&agp_ali_pci_driver);
 415 }
 416
 417 module_init(agp_ali_init);
 418 module_exit(agp_ali_cleanup);
 419
 420 MODULE_AUTHOR("Dave Jones");
 421 MODULE_LICENSE("GPL and additional rights");
 422