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 "agp.h"
  10
  11 #define SIS_ATTBASE     0x90
  12 #define SIS_APSIZE      0x94
  13 #define SIS_TLBCNTRL    0x97
  14 #define SIS_TLBFLUSH    0x98
  15
  16 static int __devinitdata agp_sis_force_delay = 0;
  17 static int __devinitdata agp_sis_agp_spec = -1;
  18
  19 static int sis_fetch_size(void)
  20 {
  21         u8 temp_size;
  22         int i;
  23         struct aper_size_info_8 *values;
  24
  25         pci_read_config_byte(agp_bridge->dev, SIS_APSIZE, &temp_size);
  26         values = A_SIZE_8(agp_bridge->driver->aperture_sizes);
  27         for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {
  28                 if ((temp_size == values[i].size_value) ||
  29                     ((temp_size & ~(0x03)) ==
  30                      (values[i].size_value & ~(0x03)))) {
  31                         agp_bridge->previous_size =
  32                             agp_bridge->current_size = (void *) (values + i);
  33
  34                         agp_bridge->aperture_size_idx = i;
  35                         return values[i].size;
  36                 }
  37         }
  38
  39         return 0;
  40 }
  41
  42 static void sis_tlbflush(struct agp_memory *mem)
  43 {
  44         pci_write_config_byte(agp_bridge->dev, SIS_TLBFLUSH, 0x02);
  45 }
  46
  47 static int sis_configure(void)
  48 {
  49         u32 temp;
  50         struct aper_size_info_8 *current_size;
  51
  52         current_size = A_SIZE_8(agp_bridge->current_size);
  53         pci_write_config_byte(agp_bridge->dev, SIS_TLBCNTRL, 0x05);
  54         pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
  55         agp_bridge->gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
  56         pci_write_config_dword(agp_bridge->dev, SIS_ATTBASE,
  57                                agp_bridge->gatt_bus_addr);
  58         pci_write_config_byte(agp_bridge->dev, SIS_APSIZE,
  59                               current_size->size_value);
  60         return 0;
  61 }
  62
  63 static void sis_cleanup(void)
  64 {
  65         struct aper_size_info_8 *previous_size;
  66
  67         previous_size = A_SIZE_8(agp_bridge->previous_size);
  68         pci_write_config_byte(agp_bridge->dev, SIS_APSIZE,
  69                               (previous_size->size_value & ~(0x03)));
  70 }
  71
  72 static void sis_delayed_enable(u32 mode)
  73 {
  74         struct pci_dev *device = NULL;
  75         u32 command;
  76         int rate;
  77
  78         printk(KERN_INFO PFX "Found an AGP %d.%d compliant device at %s.\n",
  79                 agp_bridge->major_version,
  80                 agp_bridge->minor_version,
  81                 agp_bridge->dev->slot_name);
  82
  83         pci_read_config_dword(agp_bridge->dev, agp_bridge->capndx + PCI_AGP_STATUS, &command);
  84         command = agp_collect_device_status(mode, command);
  85         command |= AGPSTAT_AGP_ENABLE;
  86         rate = (command & 0x7) << 2;
  87
  88         while ((device = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, device)) != NULL) {
  89                 u8 agp = pci_find_capability(device, PCI_CAP_ID_AGP);
  90                 if (!agp)
  91                         continue;
  92
  93                 printk(KERN_INFO PFX "Putting AGP V3 device at %s into %dx mode\n",
  94                         pci_name(device), rate);
  95
  96                 pci_write_config_dword(device, agp + PCI_AGP_COMMAND, command);
  97
  98                 /*
  99                  * Weird: on some sis chipsets any rate change in the target
 100                  * command register triggers a 5ms screwup during which the master
 101                  * cannot be configured
 102                  */
 103                 if (device->device == agp_bridge->dev->device) {
 104                         printk(KERN_INFO PFX "SiS delay workaround: giving bridge time to recover.\n");
 105                         set_current_state(TASK_UNINTERRUPTIBLE);
 106                         schedule_timeout (1+(HZ*10)/1000);
 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 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_530,
 149                 .chipset_name   = "530",
 150         },
 151         {
 152                 .device_id      = PCI_DEVICE_ID_SI_540,
 153                 .chipset_name   = "540",
 154         },
 155         {
 156                 .device_id      = PCI_DEVICE_ID_SI_550,
 157                 .chipset_name   = "550",
 158         },
 159         {
 160                 .device_id      = PCI_DEVICE_ID_SI_620,
 161                 .chipset_name   = "620",
 162         },
 163         {
 164                 .device_id      = PCI_DEVICE_ID_SI_630,
 165                 .chipset_name   = "630",
 166         },
 167         {
 168                 .device_id      = PCI_DEVICE_ID_SI_645,
 169                 .chipset_name   = "645",
 170         },
 171         {
 172                 .device_id      = PCI_DEVICE_ID_SI_646,
 173                 .chipset_name   = "646",
 174         },
 175         {
 176                 .device_id      = PCI_DEVICE_ID_SI_648,
 177                 .chipset_name   = "648",
 178         },
 179         {
 180                 .device_id      = PCI_DEVICE_ID_SI_650,
 181                 .chipset_name   = "650",
 182         },
 183         {
 184                 .device_id  = PCI_DEVICE_ID_SI_651,
 185                 .chipset_name   = "651",
 186         },
 187         {
 188                 .device_id      = PCI_DEVICE_ID_SI_655,
 189                 .chipset_name   = "655",
 190         },
 191         {
 192                 .device_id      = PCI_DEVICE_ID_SI_661,
 193                 .chipset_name   = "661",
 194         },
 195         {
 196                 .device_id      = PCI_DEVICE_ID_SI_730,
 197                 .chipset_name   = "730",
 198         },
 199         {
 200                 .device_id      = PCI_DEVICE_ID_SI_735,
 201                 .chipset_name   = "735",
 202         },
 203         {
 204                 .device_id      = PCI_DEVICE_ID_SI_740,
 205                 .chipset_name   = "740",
 206         },
 207         {
 208                 .device_id      = PCI_DEVICE_ID_SI_741,
 209                 .chipset_name   = "741",
 210         },
 211         {
 212                 .device_id      = PCI_DEVICE_ID_SI_745,
 213                 .chipset_name   = "745",
 214         },
 215         {
 216                 .device_id      = PCI_DEVICE_ID_SI_746,
 217                 .chipset_name   = "746",
 218         },
 219         {
 220                 .device_id      = PCI_DEVICE_ID_SI_760,
 221                 .chipset_name   = "760",
 222         },
 223         { }, /* dummy final entry, always present */
 224 };
 225
 226
 227 // chipsets that require the 'delay hack'
 228 static int sis_broken_chipsets[] __devinitdata = {
 229         PCI_DEVICE_ID_SI_648,
 230         PCI_DEVICE_ID_SI_746,
 231         0 // terminator
 232 };
 233
 234 static void __devinit sis_get_driver(struct agp_bridge_data *bridge)
 235 {
 236         int i;
 237
 238         for(i=0; sis_broken_chipsets[i]!=0; ++i)
 239                 if(bridge->dev->device==sis_broken_chipsets[i])
 240                         break;
 241
 242         if(sis_broken_chipsets[i] || agp_sis_force_delay)
 243                 sis_driver.agp_enable=sis_delayed_enable;
 244
 245         // sis chipsets that indicate less than agp3.5
 246         // are not actually fully agp3 compliant
 247         if ((agp_bridge->major_version == 3 && agp_bridge->minor_version >= 5
 248              && agp_sis_agp_spec!=0) || agp_sis_agp_spec==1) {
 249                 sis_driver.aperture_sizes = agp3_generic_sizes;
 250                 sis_driver.size_type = U16_APER_SIZE;
 251                 sis_driver.num_aperture_sizes = AGP_GENERIC_SIZES_ENTRIES;
 252                 sis_driver.configure = agp3_generic_configure;
 253                 sis_driver.fetch_size = agp3_generic_fetch_size;
 254                 sis_driver.cleanup = agp3_generic_cleanup;
 255                 sis_driver.tlb_flush = agp3_generic_tlbflush;
 256         }
 257 }
 258
 259
 260 static int __devinit agp_sis_probe(struct pci_dev *pdev,
 261                                    const struct pci_device_id *ent)
 262 {
 263         struct agp_device_ids *devs = sis_agp_device_ids;
 264         struct agp_bridge_data *bridge;
 265         u8 cap_ptr;
 266         int j;
 267
 268         cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
 269         if (!cap_ptr)
 270                 return -ENODEV;
 271
 272         /* probe for known chipsets */
 273         for (j = 0; devs[j].chipset_name; j++) {
 274                 if (pdev->device == devs[j].device_id) {
 275                         printk(KERN_INFO PFX "Detected SiS %s chipset\n",
 276                                         devs[j].chipset_name);
 277                         goto found;
 278                 }
 279         }
 280
 281         printk(KERN_ERR PFX "Unsupported SiS chipset (device id: %04x)\n",
 282                     pdev->device);
 283         return -ENODEV;
 284
 285 found:
 286         bridge = agp_alloc_bridge();
 287         if (!bridge)
 288                 return -ENOMEM;
 289
 290         bridge->driver = &sis_driver;
 291         bridge->dev = pdev;
 292         bridge->capndx = cap_ptr;
 293
 294         get_agp_version(bridge);
 295
 296         /* Fill in the mode register */
 297         pci_read_config_dword(pdev, bridge->capndx+PCI_AGP_STATUS, &bridge->mode);
 298         sis_get_driver(bridge);
 299
 300         pci_set_drvdata(pdev, bridge);
 301         return agp_add_bridge(bridge);
 302 }
 303
 304 static void __devexit agp_sis_remove(struct pci_dev *pdev)
 305 {
 306         struct agp_bridge_data *bridge = pci_get_drvdata(pdev);
 307
 308         agp_remove_bridge(bridge);
 309         agp_put_bridge(bridge);
 310 }
 311
 312 static struct pci_device_id agp_sis_pci_table[] = {
 313         {
 314         .class          = (PCI_CLASS_BRIDGE_HOST << 8),
 315         .class_mask     = ~0,
 316         .vendor         = PCI_VENDOR_ID_SI,
 317         .device         = PCI_ANY_ID,
 318         .subvendor      = PCI_ANY_ID,
 319         .subdevice      = PCI_ANY_ID,
 320         },
 321         { }
 322 };
 323
 324 MODULE_DEVICE_TABLE(pci, agp_sis_pci_table);
 325
 326 static struct pci_driver agp_sis_pci_driver = {
 327         .name           = "agpgart-sis",
 328         .id_table       = agp_sis_pci_table,
 329         .probe          = agp_sis_probe,
 330         .remove         = agp_sis_remove,
 331 };
 332
 333 static int __init agp_sis_init(void)
 334 {
 335         return pci_module_init(&agp_sis_pci_driver);
 336 }
 337
 338 static void __exit agp_sis_cleanup(void)
 339 {
 340         pci_unregister_driver(&agp_sis_pci_driver);
 341 }
 342
 343 module_init(agp_sis_init);
 344 module_exit(agp_sis_cleanup);
 345
 346 MODULE_PARM(agp_sis_force_delay,"i");
 347 MODULE_PARM_DESC(agp_sis_force_delay,"forces sis delay hack");
 348 MODULE_PARM(agp_sis_agp_spec,"i");
 349 MODULE_PARM_DESC(agp_sis_agp_spec,"0=force sis init, 1=force generic agp3 init, default: autodetect");
 350 MODULE_LICENSE("GPL and additional rights");