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 "agp.h"
  11
  12 #define ALI_AGPCTRL     0xb8
  13 #define ALI_ATTBASE     0xbc
  14 #define ALI_TLBCTRL     0xc0
  15 #define ALI_TAGCTRL     0xc4
  16 #define ALI_CACHE_FLUSH_CTRL    0xD0
  17 #define ALI_CACHE_FLUSH_ADDR_MASK       0xFFFFF000
  18 #define ALI_CACHE_FLUSH_EN      0x100
  19
  20 static int ali_fetch_size(void)
  21 {
  22         int i;
  23         u32 temp;
  24         struct aper_size_info_32 *values;
  25
  26         pci_read_config_dword(agp_bridge->dev, ALI_ATTBASE, &temp);
  27         temp &= ~(0xfffffff0);
  28         values = A_SIZE_32(agp_bridge->driver->aperture_sizes);
  29
  30         for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {
  31                 if (temp == values[i].size_value) {
  32                         agp_bridge->previous_size =
  33                             agp_bridge->current_size = (void *) (values + i);
  34                         agp_bridge->aperture_size_idx = i;
  35                         return values[i].size;
  36                 }
  37         }
  38
  39         return 0;
  40 }
  41
  42 static void ali_tlbflush(struct agp_memory *mem)
  43 {
  44         u32 temp;
  45
  46         pci_read_config_dword(agp_bridge->dev, ALI_TLBCTRL, &temp);
  47         temp &= 0xfffffff0;
  48         temp |= (1<<0 | 1<<1);
  49         pci_write_config_dword(agp_bridge->dev, ALI_TAGCTRL, temp);
  50 }
  51
  52 static void ali_cleanup(void)
  53 {
  54         struct aper_size_info_32 *previous_size;
  55         u32 temp;
  56
  57         previous_size = A_SIZE_32(agp_bridge->previous_size);
  58
  59         pci_read_config_dword(agp_bridge->dev, ALI_TLBCTRL, &temp);
  60 // clear tag
  61         pci_write_config_dword(agp_bridge->dev, ALI_TAGCTRL,
  62                         ((temp & 0xffffff00) | 0x00000001|0x00000002));
  63
  64         pci_read_config_dword(agp_bridge->dev,  ALI_ATTBASE, &temp);
  65         pci_write_config_dword(agp_bridge->dev, ALI_ATTBASE,
  66                         ((temp & 0x00000ff0) | previous_size->size_value));
  67 }
  68
  69 static int ali_configure(void)
  70 {
  71         u32 temp;
  72         struct aper_size_info_32 *current_size;
  73
  74         current_size = A_SIZE_32(agp_bridge->current_size);
  75
  76         /* aperture size and gatt addr */
  77         pci_read_config_dword(agp_bridge->dev, ALI_ATTBASE, &temp);
  78         temp = (((temp & 0x00000ff0) | (agp_bridge->gatt_bus_addr & 0xfffff000))
  79                         | (current_size->size_value & 0xf));
  80         pci_write_config_dword(agp_bridge->dev, ALI_ATTBASE, temp);
  81
  82         /* tlb control */
  83         pci_read_config_dword(agp_bridge->dev, ALI_TLBCTRL, &temp);
  84         pci_write_config_dword(agp_bridge->dev, ALI_TLBCTRL, ((temp & 0xffffff00) | 0x00000010));
  85
  86         /* address to map to */
  87         pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
  88         agp_bridge->gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
  89
  90 #if 0
  91         if (agp_bridge->type == ALI_M1541) {
  92                 u32 nlvm_addr = 0;
  93
  94                 switch (current_size->size_value) {
  95                         case 0:  break;
  96                         case 1:  nlvm_addr = 0x100000;break;
  97                         case 2:  nlvm_addr = 0x200000;break;
  98                         case 3:  nlvm_addr = 0x400000;break;
  99                         case 4:  nlvm_addr = 0x800000;break;
 100                         case 6:  nlvm_addr = 0x1000000;break;
 101                         case 7:  nlvm_addr = 0x2000000;break;
 102                         case 8:  nlvm_addr = 0x4000000;break;
 103                         case 9:  nlvm_addr = 0x8000000;break;
 104                         case 10: nlvm_addr = 0x10000000;break;
 105                         default: break;
 106                 }
 107                 nlvm_addr--;
 108                 nlvm_addr&=0xfff00000;
 109
 110                 nlvm_addr+= agp_bridge->gart_bus_addr;
 111                 nlvm_addr|=(agp_bridge->gart_bus_addr>>12);
 112                 printk(KERN_INFO PFX "nlvm top &base = %8x\n",nlvm_addr);
 113         }
 114 #endif
 115
 116         pci_read_config_dword(agp_bridge->dev, ALI_TLBCTRL, &temp);
 117         temp &= 0xffffff7f;             //enable TLB
 118         pci_write_config_dword(agp_bridge->dev, ALI_TLBCTRL, temp);
 119
 120         return 0;
 121 }
 122
 123
 124 static void m1541_cache_flush(void)
 125 {
 126         int i, page_count;
 127         u32 temp;
 128
 129         global_cache_flush();
 130
 131         page_count = 1 << A_SIZE_32(agp_bridge->current_size)->page_order;
 132         for (i = 0; i < PAGE_SIZE * page_count; i += PAGE_SIZE) {
 133                 pci_read_config_dword(agp_bridge->dev, ALI_CACHE_FLUSH_CTRL,
 134                                 &temp);
 135                 pci_write_config_dword(agp_bridge->dev, ALI_CACHE_FLUSH_CTRL,
 136                                 (((temp & ALI_CACHE_FLUSH_ADDR_MASK) |
 137                                   (agp_bridge->gatt_bus_addr + i)) |
 138                                  ALI_CACHE_FLUSH_EN));
 139         }
 140 }
 141
 142 static void *m1541_alloc_page(void)
 143 {
 144         void *addr = agp_generic_alloc_page();
 145         u32 temp;
 146
 147         if (!addr)
 148                 return NULL;
 149
 150         pci_read_config_dword(agp_bridge->dev, ALI_CACHE_FLUSH_CTRL, &temp);
 151         pci_write_config_dword(agp_bridge->dev, ALI_CACHE_FLUSH_CTRL,
 152                         (((temp & ALI_CACHE_FLUSH_ADDR_MASK) |
 153                           virt_to_phys(addr)) | ALI_CACHE_FLUSH_EN ));
 154         return addr;
 155 }
 156
 157 static void ali_destroy_page(void * addr)
 158 {
 159         if (addr) {
 160                 global_cache_flush();   /* is this really needed?  --hch */
 161                 agp_generic_destroy_page(addr);
 162         }
 163 }
 164
 165 static void m1541_destroy_page(void * addr)
 166 {
 167         u32 temp;
 168
 169         if (addr == NULL)
 170                 return;
 171
 172         global_cache_flush();
 173
 174         pci_read_config_dword(agp_bridge->dev, ALI_CACHE_FLUSH_CTRL, &temp);
 175         pci_write_config_dword(agp_bridge->dev, ALI_CACHE_FLUSH_CTRL,
 176                         (((temp & ALI_CACHE_FLUSH_ADDR_MASK) |
 177                           virt_to_phys(addr)) | ALI_CACHE_FLUSH_EN));
 178         agp_generic_destroy_page(addr);
 179 }
 180
 181
 182 /* Setup function */
 183
 184 static struct aper_size_info_32 ali_generic_sizes[7] =
 185 {
 186         {256, 65536, 6, 10},
 187         {128, 32768, 5, 9},
 188         {64, 16384, 4, 8},
 189         {32, 8192, 3, 7},
 190         {16, 4096, 2, 6},
 191         {8, 2048, 1, 4},
 192         {4, 1024, 0, 3}
 193 };
 194
 195 struct agp_bridge_driver ali_generic_bridge = {
 196         .owner                  = THIS_MODULE,
 197         .aperture_sizes         = ali_generic_sizes,
 198         .size_type              = U32_APER_SIZE,
 199         .num_aperture_sizes     = 7,
 200         .configure              = ali_configure,
 201         .fetch_size             = ali_fetch_size,
 202         .cleanup                = ali_cleanup,
 203         .tlb_flush              = ali_tlbflush,
 204         .mask_memory            = agp_generic_mask_memory,
 205         .masks                  = NULL,
 206         .agp_enable             = agp_generic_enable,
 207         .cache_flush            = global_cache_flush,
 208         .create_gatt_table      = agp_generic_create_gatt_table,
 209         .free_gatt_table        = agp_generic_free_gatt_table,
 210         .insert_memory          = agp_generic_insert_memory,
 211         .remove_memory          = agp_generic_remove_memory,
 212         .alloc_by_type          = agp_generic_alloc_by_type,
 213         .free_by_type           = agp_generic_free_by_type,
 214         .agp_alloc_page         = agp_generic_alloc_page,
 215         .agp_destroy_page       = ali_destroy_page,
 216 };
 217
 218 struct agp_bridge_driver ali_m1541_bridge = {
 219         .owner                  = THIS_MODULE,
 220         .aperture_sizes         = ali_generic_sizes,
 221         .size_type              = U32_APER_SIZE,
 222         .num_aperture_sizes     = 7,
 223         .configure              = ali_configure,
 224         .fetch_size             = ali_fetch_size,
 225         .cleanup                = ali_cleanup,
 226         .tlb_flush              = ali_tlbflush,
 227         .mask_memory            = agp_generic_mask_memory,
 228         .masks                  = NULL,
 229         .agp_enable             = agp_generic_enable,
 230         .cache_flush            = m1541_cache_flush,
 231         .create_gatt_table      = agp_generic_create_gatt_table,
 232         .free_gatt_table        = agp_generic_free_gatt_table,
 233         .insert_memory          = agp_generic_insert_memory,
 234         .remove_memory          = agp_generic_remove_memory,
 235         .alloc_by_type          = agp_generic_alloc_by_type,
 236         .free_by_type           = agp_generic_free_by_type,
 237         .agp_alloc_page         = m1541_alloc_page,
 238         .agp_destroy_page       = m1541_destroy_page,
 239 };
 240
 241
 242 static struct agp_device_ids ali_agp_device_ids[] __devinitdata =
 243 {
 244         {
 245                 .device_id      = PCI_DEVICE_ID_AL_M1541,
 246                 .chipset_name   = "M1541",
 247         },
 248         {
 249                 .device_id      = PCI_DEVICE_ID_AL_M1621,
 250                 .chipset_name   = "M1621",
 251         },
 252         {
 253                 .device_id      = PCI_DEVICE_ID_AL_M1631,
 254                 .chipset_name   = "M1631",
 255         },
 256         {
 257                 .device_id      = PCI_DEVICE_ID_AL_M1632,
 258                 .chipset_name   = "M1632",
 259         },
 260         {
 261                 .device_id      = PCI_DEVICE_ID_AL_M1641,
 262                 .chipset_name   = "M1641",
 263         },
 264         {
 265                 .device_id      = PCI_DEVICE_ID_AL_M1644,
 266                 .chipset_name   = "M1644",
 267         },
 268         {
 269                 .device_id      = PCI_DEVICE_ID_AL_M1647,
 270                 .chipset_name   = "M1647",
 271         },
 272         {
 273                 .device_id      = PCI_DEVICE_ID_AL_M1651,
 274                 .chipset_name   = "M1651",
 275         },
 276         {
 277                 .device_id      = PCI_DEVICE_ID_AL_M1671,
 278                 .chipset_name   = "M1671",
 279         },
 280         { }, /* dummy final entry, always present */
 281 };
 282
 283 static int __devinit agp_ali_probe(struct pci_dev *pdev,
 284                                 const struct pci_device_id *ent)
 285 {
 286         struct agp_device_ids *devs = ali_agp_device_ids;
 287         struct agp_bridge_data *bridge;
 288         u8 hidden_1621_id, cap_ptr;
 289         int j;
 290
 291         cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
 292         if (!cap_ptr)
 293                 return -ENODEV;
 294
 295         /* probe for known chipsets */
 296         for (j = 0; devs[j].chipset_name; j++) {
 297                 if (pdev->device == devs[j].device_id)
 298                         goto found;
 299         }
 300
 301         printk(KERN_ERR PFX "Unsupported ALi chipset (device id: %04x)\n",
 302              pdev->device);
 303         return -ENODEV;
 304
 305
 306 found:
 307         bridge = agp_alloc_bridge();
 308         if (!bridge)
 309                 return -ENOMEM;
 310
 311         bridge->dev = pdev;
 312         bridge->capndx = cap_ptr;
 313
 314         switch (pdev->device) {
 315         case PCI_DEVICE_ID_AL_M1541:
 316                 bridge->driver = &ali_m1541_bridge;
 317                 break;
 318         case PCI_DEVICE_ID_AL_M1621:
 319                 pci_read_config_byte(pdev, 0xFB, &hidden_1621_id);
 320                 switch (hidden_1621_id) {
 321                 case 0x31:
 322                         devs[j].chipset_name = "M1631";
 323                         break;
 324                 case 0x32:
 325                         devs[j].chipset_name = "M1632";
 326                         break;
 327                 case 0x41:
 328                         devs[j].chipset_name = "M1641";
 329                         break;
 330                 case 0x43:
 331                         devs[j].chipset_name = "M????";
 332                         break;
 333                 case 0x47:
 334                         devs[j].chipset_name = "M1647";
 335                         break;
 336                 case 0x51:
 337                         devs[j].chipset_name = "M1651";
 338                         break;
 339                 default:
 340                         break;
 341                 }
 342                 /*FALLTHROUGH*/
 343         default:
 344                 bridge->driver = &ali_generic_bridge;
 345         }
 346
 347         printk(KERN_INFO PFX "Detected ALi %s chipset\n",
 348                         devs[j].chipset_name);
 349
 350         /* Fill in the mode register */
 351         pci_read_config_dword(pdev,
 352                         bridge->capndx+PCI_AGP_STATUS,
 353                         &bridge->mode);
 354
 355         pci_set_drvdata(pdev, bridge);
 356         return agp_add_bridge(bridge);
 357 }
 358
 359 static void __devexit agp_ali_remove(struct pci_dev *pdev)
 360 {
 361         struct agp_bridge_data *bridge = pci_get_drvdata(pdev);
 362
 363         agp_remove_bridge(bridge);
 364         agp_put_bridge(bridge);
 365 }
 366
 367 static struct pci_device_id agp_ali_pci_table[] = {
 368         {
 369         .class          = (PCI_CLASS_BRIDGE_HOST << 8),
 370         .class_mask     = ~0,
 371         .vendor         = PCI_VENDOR_ID_AL,
 372         .device         = PCI_ANY_ID,
 373         .subvendor      = PCI_ANY_ID,
 374         .subdevice      = PCI_ANY_ID,
 375         },
 376         { }
 377 };
 378
 379 MODULE_DEVICE_TABLE(pci, agp_ali_pci_table);
 380
 381 static struct pci_driver agp_ali_pci_driver = {
 382         .name           = "agpgart-ali",
 383         .id_table       = agp_ali_pci_table,
 384         .probe          = agp_ali_probe,
 385         .remove         = agp_ali_remove,
 386 };
 387
 388 static int __init agp_ali_init(void)
 389 {
 390         return pci_module_init(&agp_ali_pci_driver);
 391 }
 392
 393 static void __exit agp_ali_cleanup(void)
 394 {
 395         pci_unregister_driver(&agp_ali_pci_driver);
 396 }
 397
 398 module_init(agp_ali_init);
 399 module_exit(agp_ali_cleanup);
 400
 401 MODULE_AUTHOR("Dave Jones <davej@codemonkey.org.uk>");
 402 MODULE_LICENSE("GPL and additional rights");
 403