drivers/char/agp/sis-agp.c

   1 /*
   2  * SiS AGPGART routines.
   3  */
   4
   5 #include <linux/module.h>
   6 #include <linux/pci.h>
   7 #include <linux/init.h>
   8 #include <linux/agp_backend.h>
   9 #include <linux/delay.h>
  10 #include "agp.h"
  11
  12 #define SIS_ATTBASE     0x90
  13 #define SIS_APSIZE      0x94
  14 #define SIS_TLBCNTRL    0x97
  15 #define SIS_TLBFLUSH    0x98
  16
  17 static int __devinitdata agp_sis_force_delay = 0;
  18 static int __devinitdata agp_sis_agp_spec = -1;
  19
  20 static int sis_fetch_size(void)
  21 {
  22         u8 temp_size;
  23         int i;
  24         struct aper_size_info_8 *values;
  25
  26         pci_read_config_byte(agp_bridge->dev, SIS_APSIZE, &temp_size);
  27         values = A_SIZE_8(agp_bridge->driver->aperture_sizes);
  28         for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {
  29                 if ((temp_size == values[i].size_value) ||
  30                     ((temp_size & ~(0x03)) ==
  31                      (values[i].size_value & ~(0x03)))) {
  32                         agp_bridge->previous_size =
  33                             agp_bridge->current_size = (void *) (values + i);
  34
  35                         agp_bridge->aperture_size_idx = i;
  36                         return values[i].size;
  37                 }
  38         }
  39
  40         return 0;
  41 }
  42
  43 static void sis_tlbflush(struct agp_memory *mem)
  44 {
  45         pci_write_config_byte(agp_bridge->dev, SIS_TLBFLUSH, 0x02);
  46 }
  47
  48 static int sis_configure(void)
  49 {
  50         u32 temp;
  51         struct aper_size_info_8 *current_size;
  52
  53         current_size = A_SIZE_8(agp_bridge->current_size);
  54         pci_write_config_byte(agp_bridge->dev, SIS_TLBCNTRL, 0x05);
  55         pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
  56         agp_bridge->gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
  57         pci_write_config_dword(agp_bridge->dev, SIS_ATTBASE,
  58                                agp_bridge->gatt_bus_addr);
  59         pci_write_config_byte(agp_bridge->dev, SIS_APSIZE,
  60                               current_size->size_value);
  61         return 0;
  62 }
  63
  64 static void sis_cleanup(void)
  65 {
  66         struct aper_size_info_8 *previous_size;
  67
  68         previous_size = A_SIZE_8(agp_bridge->previous_size);
  69         pci_write_config_byte(agp_bridge->dev, SIS_APSIZE,
  70                               (previous_size->size_value & ~(0x03)));
  71 }
  72
  73 static void sis_delayed_enable(struct agp_bridge_data *bridge, u32 mode)
  74 {
  75         struct pci_dev *device = NULL;
  76         u32 command;
  77         int rate;
  78
  79         printk(KERN_INFO PFX "Found an AGP %d.%d compliant device at %s.\n",
  80                 agp_bridge->major_version,
  81                 agp_bridge->minor_version,
  82                 pci_name(agp_bridge->dev));
  83
  84         pci_read_config_dword(agp_bridge->dev, agp_bridge->capndx + PCI_AGP_STATUS, &command);
  85         command = agp_collect_device_status(bridge, mode, command);
  86         command |= AGPSTAT_AGP_ENABLE;
  87         rate = (command & 0x7) << 2;
  88
  89         for_each_pci_dev(device) {
  90                 u8 agp = pci_find_capability(device, PCI_CAP_ID_AGP);
  91                 if (!agp)
  92                         continue;
  93
  94                 printk(KERN_INFO PFX "Putting AGP V3 device at %s into %dx mode\n",
  95                         pci_name(device), rate);
  96
  97                 pci_write_config_dword(device, agp + PCI_AGP_COMMAND, command);
  98
  99                 /*
 100                  * Weird: on some sis chipsets any rate change in the target
 101                  * command register triggers a 5ms screwup during which the master
 102                  * cannot be configured
 103                  */
 104                 if (device->device == bridge->dev->device) {
 105                         printk(KERN_INFO PFX "SiS delay workaround: giving bridge time to recover.\n");
 106                         msleep(10);
 107                 }
 108         }
 109 }
 110
 111 static struct aper_size_info_8 sis_generic_sizes[7] =
 112 {
 113         {256, 65536, 6, 99},
 114         {128, 32768, 5, 83},
 115         {64, 16384, 4, 67},
 116         {32, 8192, 3, 51},
 117         {16, 4096, 2, 35},
 118         {8, 2048, 1, 19},
 119         {4, 1024, 0, 3}
 120 };
 121
 122 static struct agp_bridge_driver sis_driver = {
 123         .owner                  = THIS_MODULE,
 124         .aperture_sizes         = sis_generic_sizes,
 125         .size_type              = U8_APER_SIZE,
 126         .num_aperture_sizes     = 7,
 127         .configure              = sis_configure,
 128         .fetch_size             = sis_fetch_size,
 129         .cleanup                = sis_cleanup,
 130         .tlb_flush              = sis_tlbflush,
 131         .mask_memory            = agp_generic_mask_memory,
 132         .masks                  = NULL,
 133         .agp_enable             = agp_generic_enable,
 134         .cache_flush            = global_cache_flush,
 135         .create_gatt_table      = agp_generic_create_gatt_table,
 136         .free_gatt_table        = agp_generic_free_gatt_table,
 137         .insert_memory          = agp_generic_insert_memory,
 138         .remove_memory          = agp_generic_remove_memory,
 139         .alloc_by_type          = agp_generic_alloc_by_type,
 140         .free_by_type           = agp_generic_free_by_type,
 141         .agp_alloc_page         = agp_generic_alloc_page,
 142         .agp_destroy_page       = agp_generic_destroy_page,
 143 };
 144
 145 static struct agp_device_ids sis_agp_device_ids[] __devinitdata =
 146 {
 147         {
 148                 .device_id      = PCI_DEVICE_ID_SI_5591_AGP,
 149                 .chipset_name   = "5591",
 150         },
 151         {
 152                 .device_id      = PCI_DEVICE_ID_SI_530,
 153                 .chipset_name   = "530",
 154         },
 155         {
 156                 .device_id      = PCI_DEVICE_ID_SI_540,
 157                 .chipset_name   = "540",
 158         },
 159         {
 160                 .device_id      = PCI_DEVICE_ID_SI_550,
 161                 .chipset_name   = "550",
 162         },
 163         {
 164                 .device_id      = PCI_DEVICE_ID_SI_620,
 165                 .chipset_name   = "620",
 166         },
 167         {
 168                 .device_id      = PCI_DEVICE_ID_SI_630,
 169                 .chipset_name   = "630",
 170         },
 171         {
 172                 .device_id      = PCI_DEVICE_ID_SI_635,
 173                 .chipset_name   = "635",
 174         },
 175         {
 176                 .device_id      = PCI_DEVICE_ID_SI_645,
 177                 .chipset_name   = "645",
 178         },
 179         {
 180                 .device_id      = PCI_DEVICE_ID_SI_646,
 181                 .chipset_name   = "646",
 182         },
 183         {
 184                 .device_id      = PCI_DEVICE_ID_SI_648,
 185                 .chipset_name   = "648",
 186         },
 187         {
 188                 .device_id      = PCI_DEVICE_ID_SI_650,
 189                 .chipset_name   = "650",
 190         },
 191         {
 192                 .device_id  = PCI_DEVICE_ID_SI_651,
 193                 .chipset_name   = "651",
 194         },
 195         {
 196                 .device_id      = PCI_DEVICE_ID_SI_655,
 197                 .chipset_name   = "655",
 198         },
 199         {
 200                 .device_id      = PCI_DEVICE_ID_SI_661,
 201                 .chipset_name   = "661",
 202         },
 203         {
 204                 .device_id      = PCI_DEVICE_ID_SI_730,
 205                 .chipset_name   = "730",
 206         },
 207         {
 208                 .device_id      = PCI_DEVICE_ID_SI_735,
 209                 .chipset_name   = "735",
 210         },
 211         {
 212                 .device_id      = PCI_DEVICE_ID_SI_740,
 213                 .chipset_name   = "740",
 214         },
 215         {
 216                 .device_id      = PCI_DEVICE_ID_SI_741,
 217                 .chipset_name   = "741",
 218         },
 219         {
 220                 .device_id      = PCI_DEVICE_ID_SI_745,
 221                 .chipset_name   = "745",
 222         },
 223         {
 224                 .device_id      = PCI_DEVICE_ID_SI_746,
 225                 .chipset_name   = "746",
 226         },
 227         {
 228                 .device_id      = PCI_DEVICE_ID_SI_760,
 229                 .chipset_name   = "760",
 230         },
 231         { }, /* dummy final entry, always present */
 232 };
 233
 234
 235 // chipsets that require the 'delay hack'
 236 static int sis_broken_chipsets[] __devinitdata = {
 237         PCI_DEVICE_ID_SI_648,
 238         PCI_DEVICE_ID_SI_746,
 239         0 // terminator
 240 };
 241
 242 static void __devinit sis_get_driver(struct agp_bridge_data *bridge)
 243 {
 244         int i;
 245
 246         for(i=0; sis_broken_chipsets[i]!=0; ++i)
 247                 if(bridge->dev->device==sis_broken_chipsets[i])
 248                         break;
 249
 250         if(sis_broken_chipsets[i] || agp_sis_force_delay)
 251                 sis_driver.agp_enable=sis_delayed_enable;
 252
 253         // sis chipsets that indicate less than agp3.5
 254         // are not actually fully agp3 compliant
 255         if ((agp_bridge->major_version == 3 && agp_bridge->minor_version >= 5
 256              && agp_sis_agp_spec!=0) || agp_sis_agp_spec==1) {
 257                 sis_driver.aperture_sizes = agp3_generic_sizes;
 258                 sis_driver.size_type = U16_APER_SIZE;
 259                 sis_driver.num_aperture_sizes = AGP_GENERIC_SIZES_ENTRIES;
 260                 sis_driver.configure = agp3_generic_configure;
 261                 sis_driver.fetch_size = agp3_generic_fetch_size;
 262                 sis_driver.cleanup = agp3_generic_cleanup;
 263                 sis_driver.tlb_flush = agp3_generic_tlbflush;
 264         }
 265 }
 266
 267
 268 static int __devinit agp_sis_probe(struct pci_dev *pdev,
 269                                    const struct pci_device_id *ent)
 270 {
 271         struct agp_device_ids *devs = sis_agp_device_ids;
 272         struct agp_bridge_data *bridge;
 273         u8 cap_ptr;
 274         int j;
 275
 276         cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
 277         if (!cap_ptr)
 278                 return -ENODEV;
 279
 280         /* probe for known chipsets */
 281         for (j = 0; devs[j].chipset_name; j++) {
 282                 if (pdev->device == devs[j].device_id) {
 283                         printk(KERN_INFO PFX "Detected SiS %s chipset\n",
 284                                         devs[j].chipset_name);
 285                         goto found;
 286                 }
 287         }
 288
 289         printk(KERN_ERR PFX "Unsupported SiS chipset (device id: %04x)\n",
 290                     pdev->device);
 291         return -ENODEV;
 292
 293 found:
 294         bridge = agp_alloc_bridge();
 295         if (!bridge)
 296                 return -ENOMEM;
 297
 298         bridge->driver = &sis_driver;
 299         bridge->dev = pdev;
 300         bridge->capndx = cap_ptr;
 301
 302         get_agp_version(bridge);
 303
 304         /* Fill in the mode register */
 305         pci_read_config_dword(pdev, bridge->capndx+PCI_AGP_STATUS, &bridge->mode);
 306         sis_get_driver(bridge);
 307
 308         pci_set_drvdata(pdev, bridge);
 309         return agp_add_bridge(bridge);
 310 }
 311
 312 static void __devexit agp_sis_remove(struct pci_dev *pdev)
 313 {
 314         struct agp_bridge_data *bridge = pci_get_drvdata(pdev);
 315
 316         agp_remove_bridge(bridge);
 317         agp_put_bridge(bridge);
 318 }
 319
 320 static struct pci_device_id agp_sis_pci_table[] = {
 321         {
 322         .class          = (PCI_CLASS_BRIDGE_HOST << 8),
 323         .class_mask     = ~0,
 324         .vendor         = PCI_VENDOR_ID_SI,
 325         .device         = PCI_ANY_ID,
 326         .subvendor      = PCI_ANY_ID,
 327         .subdevice      = PCI_ANY_ID,
 328         },
 329         { }
 330 };
 331
 332 MODULE_DEVICE_TABLE(pci, agp_sis_pci_table);
 333
 334 static struct pci_driver agp_sis_pci_driver = {
 335         .name           = "agpgart-sis",
 336         .id_table       = agp_sis_pci_table,
 337         .probe          = agp_sis_probe,
 338         .remove         = agp_sis_remove,
 339 };
 340
 341 static int __init agp_sis_init(void)
 342 {
 343         if (agp_off)
 344                 return -EINVAL;
 345         return pci_register_driver(&agp_sis_pci_driver);
 346 }
 347
 348 static void __exit agp_sis_cleanup(void)
 349 {
 350         pci_unregister_driver(&agp_sis_pci_driver);
 351 }
 352
 353 module_init(agp_sis_init);
 354 module_exit(agp_sis_cleanup);
 355
 356 module_param(agp_sis_force_delay, bool, 0);
 357 MODULE_PARM_DESC(agp_sis_force_delay,"forces sis delay hack");
 358 module_param(agp_sis_agp_spec, int, 0);
 359 MODULE_PARM_DESC(agp_sis_agp_spec,"0=force sis init, 1=force generic agp3 init, default: autodetect");
 360 MODULE_LICENSE("GPL and additional rights");