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, int flags)
 159 {
 160         if (addr) {
 161                 if (flags & AGP_PAGE_DESTROY_UNMAP) {
 162                         global_cache_flush();   /* is this really needed?  --hch */
 163                         agp_generic_destroy_page(addr, flags);
 164                 } else
 165                         agp_generic_destroy_page(addr, flags);
 166         }
 167 }
 168
 169 static void m1541_destroy_page(void * addr, int flags)
 170 {
 171         u32 temp;
 172
 173         if (addr == NULL)
 174                 return;
 175
 176         if (flags & AGP_PAGE_DESTROY_UNMAP) {
 177                 global_cache_flush();
 178
 179                 pci_read_config_dword(agp_bridge->dev, ALI_CACHE_FLUSH_CTRL, &temp);
 180                 pci_write_config_dword(agp_bridge->dev, ALI_CACHE_FLUSH_CTRL,
 181                                        (((temp & ALI_CACHE_FLUSH_ADDR_MASK) |
 182                                          virt_to_gart(addr)) | ALI_CACHE_FLUSH_EN));
 183         }
 184         agp_generic_destroy_page(addr, flags);
 185 }
 186
 187
 188 /* Setup function */
 189
 190 static const struct aper_size_info_32 ali_generic_sizes[7] =
 191 {
 192         {256, 65536, 6, 10},
 193         {128, 32768, 5, 9},
 194         {64, 16384, 4, 8},
 195         {32, 8192, 3, 7},
 196         {16, 4096, 2, 6},
 197         {8, 2048, 1, 4},
 198         {4, 1024, 0, 3}
 199 };
 200
 201 static const struct agp_bridge_driver ali_generic_bridge = {
 202         .owner                  = THIS_MODULE,
 203         .aperture_sizes         = ali_generic_sizes,
 204         .size_type              = U32_APER_SIZE,
 205         .num_aperture_sizes     = 7,
 206         .configure              = ali_configure,
 207         .fetch_size             = ali_fetch_size,
 208         .cleanup                = ali_cleanup,
 209         .tlb_flush              = ali_tlbflush,
 210         .mask_memory            = agp_generic_mask_memory,
 211         .masks                  = NULL,
 212         .agp_enable             = agp_generic_enable,
 213         .cache_flush            = global_cache_flush,
 214         .create_gatt_table      = agp_generic_create_gatt_table,
 215         .free_gatt_table        = agp_generic_free_gatt_table,
 216         .insert_memory          = agp_generic_insert_memory,
 217         .remove_memory          = agp_generic_remove_memory,
 218         .alloc_by_type          = agp_generic_alloc_by_type,
 219         .free_by_type           = agp_generic_free_by_type,
 220         .agp_alloc_page         = agp_generic_alloc_page,
 221         .agp_destroy_page       = ali_destroy_page,
 222         .agp_type_to_mask_type  = agp_generic_type_to_mask_type,
 223 };
 224
 225 static const struct agp_bridge_driver ali_m1541_bridge = {
 226         .owner                  = THIS_MODULE,
 227         .aperture_sizes         = ali_generic_sizes,
 228         .size_type              = U32_APER_SIZE,
 229         .num_aperture_sizes     = 7,
 230         .configure              = ali_configure,
 231         .fetch_size             = ali_fetch_size,
 232         .cleanup                = ali_cleanup,
 233         .tlb_flush              = ali_tlbflush,
 234         .mask_memory            = agp_generic_mask_memory,
 235         .masks                  = NULL,
 236         .agp_enable             = agp_generic_enable,
 237         .cache_flush            = m1541_cache_flush,
 238         .create_gatt_table      = agp_generic_create_gatt_table,
 239         .free_gatt_table        = agp_generic_free_gatt_table,
 240         .insert_memory          = agp_generic_insert_memory,
 241         .remove_memory          = agp_generic_remove_memory,
 242         .alloc_by_type          = agp_generic_alloc_by_type,
 243         .free_by_type           = agp_generic_free_by_type,
 244         .agp_alloc_page         = m1541_alloc_page,
 245         .agp_destroy_page       = m1541_destroy_page,
 246         .agp_type_to_mask_type  = agp_generic_type_to_mask_type,
 247 };
 248
 249
 250 static struct agp_device_ids ali_agp_device_ids[] __devinitdata =
 251 {
 252         {
 253                 .device_id      = PCI_DEVICE_ID_AL_M1541,
 254                 .chipset_name   = "M1541",
 255         },
 256         {
 257                 .device_id      = PCI_DEVICE_ID_AL_M1621,
 258                 .chipset_name   = "M1621",
 259         },
 260         {
 261                 .device_id      = PCI_DEVICE_ID_AL_M1631,
 262                 .chipset_name   = "M1631",
 263         },
 264         {
 265                 .device_id      = PCI_DEVICE_ID_AL_M1632,
 266                 .chipset_name   = "M1632",
 267         },
 268         {
 269                 .device_id      = PCI_DEVICE_ID_AL_M1641,
 270                 .chipset_name   = "M1641",
 271         },
 272         {
 273                 .device_id      = PCI_DEVICE_ID_AL_M1644,
 274                 .chipset_name   = "M1644",
 275         },
 276         {
 277                 .device_id      = PCI_DEVICE_ID_AL_M1647,
 278                 .chipset_name   = "M1647",
 279         },
 280         {
 281                 .device_id      = PCI_DEVICE_ID_AL_M1651,
 282                 .chipset_name   = "M1651",
 283         },
 284         {
 285                 .device_id      = PCI_DEVICE_ID_AL_M1671,
 286                 .chipset_name   = "M1671",
 287         },
 288         {
 289                 .device_id      = PCI_DEVICE_ID_AL_M1681,
 290                 .chipset_name   = "M1681",
 291         },
 292         {
 293                 .device_id      = PCI_DEVICE_ID_AL_M1683,
 294                 .chipset_name   = "M1683",
 295         },
 296
 297         { }, /* dummy final entry, always present */
 298 };
 299
 300 static int __devinit agp_ali_probe(struct pci_dev *pdev,
 301                                 const struct pci_device_id *ent)
 302 {
 303         struct agp_device_ids *devs = ali_agp_device_ids;
 304         struct agp_bridge_data *bridge;
 305         u8 hidden_1621_id, cap_ptr;
 306         int j;
 307
 308         cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
 309         if (!cap_ptr)
 310                 return -ENODEV;
 311
 312         /* probe for known chipsets */
 313         for (j = 0; devs[j].chipset_name; j++) {
 314                 if (pdev->device == devs[j].device_id)
 315                         goto found;
 316         }
 317
 318         printk(KERN_ERR PFX "Unsupported ALi chipset (device id: %04x)\n",
 319              pdev->device);
 320         return -ENODEV;
 321
 322
 323 found:
 324         bridge = agp_alloc_bridge();
 325         if (!bridge)
 326                 return -ENOMEM;
 327
 328         bridge->dev = pdev;
 329         bridge->capndx = cap_ptr;
 330
 331         switch (pdev->device) {
 332         case PCI_DEVICE_ID_AL_M1541:
 333                 bridge->driver = &ali_m1541_bridge;
 334                 break;
 335         case PCI_DEVICE_ID_AL_M1621:
 336                 pci_read_config_byte(pdev, 0xFB, &hidden_1621_id);
 337                 switch (hidden_1621_id) {
 338                 case 0x31:
 339                         devs[j].chipset_name = "M1631";
 340                         break;
 341                 case 0x32:
 342                         devs[j].chipset_name = "M1632";
 343                         break;
 344                 case 0x41:
 345                         devs[j].chipset_name = "M1641";
 346                         break;
 347                 case 0x43:
 348                         devs[j].chipset_name = "M????";
 349                         break;
 350                 case 0x47:
 351                         devs[j].chipset_name = "M1647";
 352                         break;
 353                 case 0x51:
 354                         devs[j].chipset_name = "M1651";
 355                         break;
 356                 default:
 357                         break;
 358                 }
 359                 /*FALLTHROUGH*/
 360         default:
 361                 bridge->driver = &ali_generic_bridge;
 362         }
 363
 364         printk(KERN_INFO PFX "Detected ALi %s chipset\n",
 365                         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 __devexit 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 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 <davej@codemonkey.org.uk>");
 421 MODULE_LICENSE("GPL and additional rights");
 422