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         pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
  89         agp_bridge->gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
  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                 printk(KERN_INFO PFX "nlvm top &base = %8x\n",nlvm_addr);
 114         }
 115 #endif
 116
 117         pci_read_config_dword(agp_bridge->dev, ALI_TLBCTRL, &temp);
 118         temp &= 0xffffff7f;             //enable TLB
 119         pci_write_config_dword(agp_bridge->dev, ALI_TLBCTRL, temp);
 120
 121         return 0;
 122 }
 123
 124
 125 static void m1541_cache_flush(void)
 126 {
 127         int i, page_count;
 128         u32 temp;
 129
 130         global_cache_flush();
 131
 132         page_count = 1 << A_SIZE_32(agp_bridge->current_size)->page_order;
 133         for (i = 0; i < PAGE_SIZE * page_count; i += PAGE_SIZE) {
 134                 pci_read_config_dword(agp_bridge->dev, ALI_CACHE_FLUSH_CTRL,
 135                                 &temp);
 136                 pci_write_config_dword(agp_bridge->dev, ALI_CACHE_FLUSH_CTRL,
 137                                 (((temp & ALI_CACHE_FLUSH_ADDR_MASK) |
 138                                   (agp_bridge->gatt_bus_addr + i)) |
 139                                  ALI_CACHE_FLUSH_EN));
 140         }
 141 }
 142
 143 static void *m1541_alloc_page(struct agp_bridge_data *bridge)
 144 {
 145         void *addr = agp_generic_alloc_page(agp_bridge);
 146         u32 temp;
 147
 148         if (!addr)
 149                 return NULL;
 150
 151         pci_read_config_dword(agp_bridge->dev, ALI_CACHE_FLUSH_CTRL, &temp);
 152         pci_write_config_dword(agp_bridge->dev, ALI_CACHE_FLUSH_CTRL,
 153                         (((temp & ALI_CACHE_FLUSH_ADDR_MASK) |
 154                           virt_to_gart(addr)) | ALI_CACHE_FLUSH_EN ));
 155         return addr;
 156 }
 157
 158 static void ali_destroy_page(void * addr)
 159 {
 160         if (addr) {
 161                 global_cache_flush();   /* is this really needed?  --hch */
 162                 agp_generic_destroy_page(addr);
 163         }
 164 }
 165
 166 static void m1541_destroy_page(void * addr)
 167 {
 168         u32 temp;
 169
 170         if (addr == NULL)
 171                 return;
 172
 173         global_cache_flush();
 174
 175         pci_read_config_dword(agp_bridge->dev, ALI_CACHE_FLUSH_CTRL, &temp);
 176         pci_write_config_dword(agp_bridge->dev, ALI_CACHE_FLUSH_CTRL,
 177                         (((temp & ALI_CACHE_FLUSH_ADDR_MASK) |
 178                           virt_to_gart(addr)) | ALI_CACHE_FLUSH_EN));
 179         agp_generic_destroy_page(addr);
 180 }
 181
 182
 183 /* Setup function */
 184
 185 static struct aper_size_info_32 ali_generic_sizes[7] =
 186 {
 187         {256, 65536, 6, 10},
 188         {128, 32768, 5, 9},
 189         {64, 16384, 4, 8},
 190         {32, 8192, 3, 7},
 191         {16, 4096, 2, 6},
 192         {8, 2048, 1, 4},
 193         {4, 1024, 0, 3}
 194 };
 195
 196 static struct agp_bridge_driver ali_generic_bridge = {
 197         .owner                  = THIS_MODULE,
 198         .aperture_sizes         = ali_generic_sizes,
 199         .size_type              = U32_APER_SIZE,
 200         .num_aperture_sizes     = 7,
 201         .configure              = ali_configure,
 202         .fetch_size             = ali_fetch_size,
 203         .cleanup                = ali_cleanup,
 204         .tlb_flush              = ali_tlbflush,
 205         .mask_memory            = agp_generic_mask_memory,
 206         .masks                  = NULL,
 207         .agp_enable             = agp_generic_enable,
 208         .cache_flush            = global_cache_flush,
 209         .create_gatt_table      = agp_generic_create_gatt_table,
 210         .free_gatt_table        = agp_generic_free_gatt_table,
 211         .insert_memory          = agp_generic_insert_memory,
 212         .remove_memory          = agp_generic_remove_memory,
 213         .alloc_by_type          = agp_generic_alloc_by_type,
 214         .free_by_type           = agp_generic_free_by_type,
 215         .agp_alloc_page         = agp_generic_alloc_page,
 216         .agp_destroy_page       = ali_destroy_page,
 217 };
 218
 219 static struct agp_bridge_driver ali_m1541_bridge = {
 220         .owner                  = THIS_MODULE,
 221         .aperture_sizes         = ali_generic_sizes,
 222         .size_type              = U32_APER_SIZE,
 223         .num_aperture_sizes     = 7,
 224         .configure              = ali_configure,
 225         .fetch_size             = ali_fetch_size,
 226         .cleanup                = ali_cleanup,
 227         .tlb_flush              = ali_tlbflush,
 228         .mask_memory            = agp_generic_mask_memory,
 229         .masks                  = NULL,
 230         .agp_enable             = agp_generic_enable,
 231         .cache_flush            = m1541_cache_flush,
 232         .create_gatt_table      = agp_generic_create_gatt_table,
 233         .free_gatt_table        = agp_generic_free_gatt_table,
 234         .insert_memory          = agp_generic_insert_memory,
 235         .remove_memory          = agp_generic_remove_memory,
 236         .alloc_by_type          = agp_generic_alloc_by_type,
 237         .free_by_type           = agp_generic_free_by_type,
 238         .agp_alloc_page         = m1541_alloc_page,
 239         .agp_destroy_page       = m1541_destroy_page,
 240 };
 241
 242
 243 static struct agp_device_ids ali_agp_device_ids[] __devinitdata =
 244 {
 245         {
 246                 .device_id      = PCI_DEVICE_ID_AL_M1541,
 247                 .chipset_name   = "M1541",
 248         },
 249         {
 250                 .device_id      = PCI_DEVICE_ID_AL_M1621,
 251                 .chipset_name   = "M1621",
 252         },
 253         {
 254                 .device_id      = PCI_DEVICE_ID_AL_M1631,
 255                 .chipset_name   = "M1631",
 256         },
 257         {
 258                 .device_id      = PCI_DEVICE_ID_AL_M1632,
 259                 .chipset_name   = "M1632",
 260         },
 261         {
 262                 .device_id      = PCI_DEVICE_ID_AL_M1641,
 263                 .chipset_name   = "M1641",
 264         },
 265         {
 266                 .device_id      = PCI_DEVICE_ID_AL_M1644,
 267                 .chipset_name   = "M1644",
 268         },
 269         {
 270                 .device_id      = PCI_DEVICE_ID_AL_M1647,
 271                 .chipset_name   = "M1647",
 272         },
 273         {
 274                 .device_id      = PCI_DEVICE_ID_AL_M1651,
 275                 .chipset_name   = "M1651",
 276         },
 277         {
 278                 .device_id      = PCI_DEVICE_ID_AL_M1671,
 279                 .chipset_name   = "M1671",
 280         },
 281         {
 282                 .device_id      = PCI_DEVICE_ID_AL_M1681,
 283                 .chipset_name   = "M1681",
 284         },
 285         {
 286                 .device_id      = PCI_DEVICE_ID_AL_M1683,
 287                 .chipset_name   = "M1683",
 288         },
 289
 290         { }, /* dummy final entry, always present */
 291 };
 292
 293 static int __devinit agp_ali_probe(struct pci_dev *pdev,
 294                                 const struct pci_device_id *ent)
 295 {
 296         struct agp_device_ids *devs = ali_agp_device_ids;
 297         struct agp_bridge_data *bridge;
 298         u8 hidden_1621_id, cap_ptr;
 299         int j;
 300
 301         cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
 302         if (!cap_ptr)
 303                 return -ENODEV;
 304
 305         /* probe for known chipsets */
 306         for (j = 0; devs[j].chipset_name; j++) {
 307                 if (pdev->device == devs[j].device_id)
 308                         goto found;
 309         }
 310
 311         printk(KERN_ERR PFX "Unsupported ALi chipset (device id: %04x)\n",
 312              pdev->device);
 313         return -ENODEV;
 314
 315
 316 found:
 317         bridge = agp_alloc_bridge();
 318         if (!bridge)
 319                 return -ENOMEM;
 320
 321         bridge->dev = pdev;
 322         bridge->capndx = cap_ptr;
 323
 324         switch (pdev->device) {
 325         case PCI_DEVICE_ID_AL_M1541:
 326                 bridge->driver = &ali_m1541_bridge;
 327                 break;
 328         case PCI_DEVICE_ID_AL_M1621:
 329                 pci_read_config_byte(pdev, 0xFB, &hidden_1621_id);
 330                 switch (hidden_1621_id) {
 331                 case 0x31:
 332                         devs[j].chipset_name = "M1631";
 333                         break;
 334                 case 0x32:
 335                         devs[j].chipset_name = "M1632";
 336                         break;
 337                 case 0x41:
 338                         devs[j].chipset_name = "M1641";
 339                         break;
 340                 case 0x43:
 341                         devs[j].chipset_name = "M????";
 342                         break;
 343                 case 0x47:
 344                         devs[j].chipset_name = "M1647";
 345                         break;
 346                 case 0x51:
 347                         devs[j].chipset_name = "M1651";
 348                         break;
 349                 default:
 350                         break;
 351                 }
 352                 /*FALLTHROUGH*/
 353         default:
 354                 bridge->driver = &ali_generic_bridge;
 355         }
 356
 357         printk(KERN_INFO PFX "Detected ALi %s chipset\n",
 358                         devs[j].chipset_name);
 359
 360         /* Fill in the mode register */
 361         pci_read_config_dword(pdev,
 362                         bridge->capndx+PCI_AGP_STATUS,
 363                         &bridge->mode);
 364
 365         pci_set_drvdata(pdev, bridge);
 366         return agp_add_bridge(bridge);
 367 }
 368
 369 static void __devexit agp_ali_remove(struct pci_dev *pdev)
 370 {
 371         struct agp_bridge_data *bridge = pci_get_drvdata(pdev);
 372
 373         agp_remove_bridge(bridge);
 374         agp_put_bridge(bridge);
 375 }
 376
 377 static struct pci_device_id agp_ali_pci_table[] = {
 378         {
 379         .class          = (PCI_CLASS_BRIDGE_HOST << 8),
 380         .class_mask     = ~0,
 381         .vendor         = PCI_VENDOR_ID_AL,
 382         .device         = PCI_ANY_ID,
 383         .subvendor      = PCI_ANY_ID,
 384         .subdevice      = PCI_ANY_ID,
 385         },
 386         { }
 387 };
 388
 389 MODULE_DEVICE_TABLE(pci, agp_ali_pci_table);
 390
 391 static struct pci_driver agp_ali_pci_driver = {
 392         .name           = "agpgart-ali",
 393         .id_table       = agp_ali_pci_table,
 394         .probe          = agp_ali_probe,
 395         .remove         = agp_ali_remove,
 396 };
 397
 398 static int __init agp_ali_init(void)
 399 {
 400         if (agp_off)
 401                 return -EINVAL;
 402         return pci_register_driver(&agp_ali_pci_driver);
 403 }
 404
 405 static void __exit agp_ali_cleanup(void)
 406 {
 407         pci_unregister_driver(&agp_ali_pci_driver);
 408 }
 409
 410 module_init(agp_ali_init);
 411 module_exit(agp_ali_cleanup);
 412
 413 MODULE_AUTHOR("Dave Jones <davej@codemonkey.org.uk>");
 414 MODULE_LICENSE("GPL and additional rights");
 415