Merge git://git.infradead.org/mtd-2.6
[linux-2.6] / drivers / char / agp / uninorth-agp.c
1 /*
2  * UniNorth AGPGART routines.
3  */
4 #include <linux/module.h>
5 #include <linux/pci.h>
6 #include <linux/init.h>
7 #include <linux/pagemap.h>
8 #include <linux/agp_backend.h>
9 #include <linux/delay.h>
10 #include <asm/uninorth.h>
11 #include <asm/pci-bridge.h>
12 #include <asm/prom.h>
13 #include <asm/pmac_feature.h>
14 #include "agp.h"
15
16 /*
17  * NOTES for uninorth3 (G5 AGP) supports :
18  *
19  * There maybe also possibility to have bigger cache line size for
20  * agp (see pmac_pci.c and look for cache line). Need to be investigated
21  * by someone.
22  *
23  * PAGE size are hardcoded but this may change, see asm/page.h.
24  *
25  * Jerome Glisse <j.glisse@gmail.com>
26  */
27 static int uninorth_rev;
28 static int is_u3;
29
30 static char __devinitdata *aperture = NULL;
31
32 static int uninorth_fetch_size(void)
33 {
34         int i, size = 0;
35         struct aper_size_info_32 *values =
36             A_SIZE_32(agp_bridge->driver->aperture_sizes);
37
38         if (aperture) {
39                 char *save = aperture;
40
41                 size = memparse(aperture, &aperture) >> 20;
42                 aperture = save;
43
44                 for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++)
45                         if (size == values[i].size)
46                                 break;
47
48                 if (i == agp_bridge->driver->num_aperture_sizes) {
49                         printk(KERN_ERR PFX "Invalid aperture size, using"
50                                " default\n");
51                         size = 0;
52                         aperture = NULL;
53                 }
54         }
55
56         if (!size) {
57                 for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++)
58                         if (values[i].size == 32)
59                                 break;
60         }
61
62         agp_bridge->previous_size =
63             agp_bridge->current_size = (void *)(values + i);
64         agp_bridge->aperture_size_idx = i;
65         return values[i].size;
66 }
67
68 static void uninorth_tlbflush(struct agp_memory *mem)
69 {
70         u32 ctrl = UNI_N_CFG_GART_ENABLE;
71
72         if (is_u3)
73                 ctrl |= U3_N_CFG_GART_PERFRD;
74         pci_write_config_dword(agp_bridge->dev, UNI_N_CFG_GART_CTRL,
75                                ctrl | UNI_N_CFG_GART_INVAL);
76         pci_write_config_dword(agp_bridge->dev, UNI_N_CFG_GART_CTRL, ctrl);
77
78         if (uninorth_rev <= 0x30) {
79                 pci_write_config_dword(agp_bridge->dev, UNI_N_CFG_GART_CTRL,
80                                        ctrl | UNI_N_CFG_GART_2xRESET);
81                 pci_write_config_dword(agp_bridge->dev, UNI_N_CFG_GART_CTRL,
82                                        ctrl);
83         }
84 }
85
86 static void uninorth_cleanup(void)
87 {
88         u32 tmp;
89
90         pci_read_config_dword(agp_bridge->dev, UNI_N_CFG_GART_CTRL, &tmp);
91         if (!(tmp & UNI_N_CFG_GART_ENABLE))
92                 return;
93         tmp |= UNI_N_CFG_GART_INVAL;
94         pci_write_config_dword(agp_bridge->dev, UNI_N_CFG_GART_CTRL, tmp);
95         pci_write_config_dword(agp_bridge->dev, UNI_N_CFG_GART_CTRL, 0);
96
97         if (uninorth_rev <= 0x30) {
98                 pci_write_config_dword(agp_bridge->dev, UNI_N_CFG_GART_CTRL,
99                                        UNI_N_CFG_GART_2xRESET);
100                 pci_write_config_dword(agp_bridge->dev, UNI_N_CFG_GART_CTRL,
101                                        0);
102         }
103 }
104
105 static int uninorth_configure(void)
106 {
107         struct aper_size_info_32 *current_size;
108
109         current_size = A_SIZE_32(agp_bridge->current_size);
110
111         printk(KERN_INFO PFX "configuring for size idx: %d\n",
112                current_size->size_value);
113
114         /* aperture size and gatt addr */
115         pci_write_config_dword(agp_bridge->dev,
116                 UNI_N_CFG_GART_BASE,
117                 (agp_bridge->gatt_bus_addr & 0xfffff000)
118                         | current_size->size_value);
119
120         /* HACK ALERT
121          * UniNorth seem to be buggy enough not to handle properly when
122          * the AGP aperture isn't mapped at bus physical address 0
123          */
124         agp_bridge->gart_bus_addr = 0;
125 #ifdef CONFIG_PPC64
126         /* Assume U3 or later on PPC64 systems */
127         /* high 4 bits of GART physical address go in UNI_N_CFG_AGP_BASE */
128         pci_write_config_dword(agp_bridge->dev, UNI_N_CFG_AGP_BASE,
129                                (agp_bridge->gatt_bus_addr >> 32) & 0xf);
130 #else
131         pci_write_config_dword(agp_bridge->dev,
132                 UNI_N_CFG_AGP_BASE, agp_bridge->gart_bus_addr);
133 #endif
134
135         if (is_u3) {
136                 pci_write_config_dword(agp_bridge->dev,
137                                        UNI_N_CFG_GART_DUMMY_PAGE,
138                                        agp_bridge->scratch_page_real >> 12);
139         }
140
141         return 0;
142 }
143
144 static int uninorth_insert_memory(struct agp_memory *mem, off_t pg_start,
145                                 int type)
146 {
147         int i, j, num_entries;
148         void *temp;
149
150         temp = agp_bridge->current_size;
151         num_entries = A_SIZE_32(temp)->num_entries;
152
153         if (type != 0 || mem->type != 0)
154                 /* We know nothing of memory types */
155                 return -EINVAL;
156         if ((pg_start + mem->page_count) > num_entries)
157                 return -EINVAL;
158
159         j = pg_start;
160
161         while (j < (pg_start + mem->page_count)) {
162                 if (agp_bridge->gatt_table[j])
163                         return -EBUSY;
164                 j++;
165         }
166
167         for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
168                 agp_bridge->gatt_table[j] =
169                     cpu_to_le32((mem->memory[i] & 0xFFFFF000UL) | 0x1UL);
170                 flush_dcache_range((unsigned long)__va(mem->memory[i]),
171                                    (unsigned long)__va(mem->memory[i])+0x1000);
172         }
173         (void)in_le32((volatile u32*)&agp_bridge->gatt_table[pg_start]);
174         mb();
175         flush_dcache_range((unsigned long)&agp_bridge->gatt_table[pg_start],
176                 (unsigned long)&agp_bridge->gatt_table[pg_start + mem->page_count]);
177
178         uninorth_tlbflush(mem);
179         return 0;
180 }
181
182 static int u3_insert_memory(struct agp_memory *mem, off_t pg_start, int type)
183 {
184         int i, num_entries;
185         void *temp;
186         u32 *gp;
187
188         temp = agp_bridge->current_size;
189         num_entries = A_SIZE_32(temp)->num_entries;
190
191         if (type != 0 || mem->type != 0)
192                 /* We know nothing of memory types */
193                 return -EINVAL;
194         if ((pg_start + mem->page_count) > num_entries)
195                 return -EINVAL;
196
197         gp = (u32 *) &agp_bridge->gatt_table[pg_start];
198         for (i = 0; i < mem->page_count; ++i) {
199                 if (gp[i]) {
200                         printk("u3_insert_memory: entry 0x%x occupied (%x)\n",
201                                i, gp[i]);
202                         return -EBUSY;
203                 }
204         }
205
206         for (i = 0; i < mem->page_count; i++) {
207                 gp[i] = (mem->memory[i] >> PAGE_SHIFT) | 0x80000000UL;
208                 flush_dcache_range((unsigned long)__va(mem->memory[i]),
209                                    (unsigned long)__va(mem->memory[i])+0x1000);
210         }
211         mb();
212         flush_dcache_range((unsigned long)gp, (unsigned long) &gp[i]);
213         uninorth_tlbflush(mem);
214
215         return 0;
216 }
217
218 int u3_remove_memory(struct agp_memory *mem, off_t pg_start, int type)
219 {
220         size_t i;
221         u32 *gp;
222
223         if (type != 0 || mem->type != 0)
224                 /* We know nothing of memory types */
225                 return -EINVAL;
226
227         gp = (u32 *) &agp_bridge->gatt_table[pg_start];
228         for (i = 0; i < mem->page_count; ++i)
229                 gp[i] = 0;
230         mb();
231         flush_dcache_range((unsigned long)gp, (unsigned long) &gp[i]);
232         uninorth_tlbflush(mem);
233
234         return 0;
235 }
236
237 static void uninorth_agp_enable(struct agp_bridge_data *bridge, u32 mode)
238 {
239         u32 command, scratch, status;
240         int timeout;
241
242         pci_read_config_dword(bridge->dev,
243                               bridge->capndx + PCI_AGP_STATUS,
244                               &status);
245
246         command = agp_collect_device_status(bridge, mode, status);
247         command |= PCI_AGP_COMMAND_AGP;
248
249         if (uninorth_rev == 0x21) {
250                 /*
251                  * Darwin disable AGP 4x on this revision, thus we
252                  * may assume it's broken. This is an AGP2 controller.
253                  */
254                 command &= ~AGPSTAT2_4X;
255         }
256
257         if ((uninorth_rev >= 0x30) && (uninorth_rev <= 0x33)) {
258                 /*
259                  * We need to to set REQ_DEPTH to 7 for U3 versions 1.0, 2.1,
260                  * 2.2 and 2.3, Darwin do so.
261                  */
262                 if ((command >> AGPSTAT_RQ_DEPTH_SHIFT) > 7)
263                         command = (command & ~AGPSTAT_RQ_DEPTH)
264                                 | (7 << AGPSTAT_RQ_DEPTH_SHIFT);
265         }
266
267         uninorth_tlbflush(NULL);
268
269         timeout = 0;
270         do {
271                 pci_write_config_dword(bridge->dev,
272                                        bridge->capndx + PCI_AGP_COMMAND,
273                                        command);
274                 pci_read_config_dword(bridge->dev,
275                                       bridge->capndx + PCI_AGP_COMMAND,
276                                        &scratch);
277         } while ((scratch & PCI_AGP_COMMAND_AGP) == 0 && ++timeout < 1000);
278         if ((scratch & PCI_AGP_COMMAND_AGP) == 0)
279                 printk(KERN_ERR PFX "failed to write UniNorth AGP"
280                        " command register\n");
281
282         if (uninorth_rev >= 0x30) {
283                 /* This is an AGP V3 */
284                 agp_device_command(command, (status & AGPSTAT_MODE_3_0));
285         } else {
286                 /* AGP V2 */
287                 agp_device_command(command, 0);
288         }
289
290         uninorth_tlbflush(NULL);
291 }
292
293 #ifdef CONFIG_PM
294 /*
295  * These Power Management routines are _not_ called by the normal PCI PM layer,
296  * but directly by the video driver through function pointers in the device
297  * tree.
298  */
299 static int agp_uninorth_suspend(struct pci_dev *pdev)
300 {
301         struct agp_bridge_data *bridge;
302         u32 cmd;
303         u8 agp;
304         struct pci_dev *device = NULL;
305
306         bridge = agp_find_bridge(pdev);
307         if (bridge == NULL)
308                 return -ENODEV;
309
310         /* Only one suspend supported */
311         if (bridge->dev_private_data)
312                 return 0;
313
314         /* turn off AGP on the video chip, if it was enabled */
315         for_each_pci_dev(device) {
316                 /* Don't touch the bridge yet, device first */
317                 if (device == pdev)
318                         continue;
319                 /* Only deal with devices on the same bus here, no Mac has a P2P
320                  * bridge on the AGP port, and mucking around the entire PCI
321                  * tree is source of problems on some machines because of a bug
322                  * in some versions of pci_find_capability() when hitting a dead
323                  * device
324                  */
325                 if (device->bus != pdev->bus)
326                         continue;
327                 agp = pci_find_capability(device, PCI_CAP_ID_AGP);
328                 if (!agp)
329                         continue;
330                 pci_read_config_dword(device, agp + PCI_AGP_COMMAND, &cmd);
331                 if (!(cmd & PCI_AGP_COMMAND_AGP))
332                         continue;
333                 printk("uninorth-agp: disabling AGP on device %s\n",
334                                 pci_name(device));
335                 cmd &= ~PCI_AGP_COMMAND_AGP;
336                 pci_write_config_dword(device, agp + PCI_AGP_COMMAND, cmd);
337         }
338
339         /* turn off AGP on the bridge */
340         agp = pci_find_capability(pdev, PCI_CAP_ID_AGP);
341         pci_read_config_dword(pdev, agp + PCI_AGP_COMMAND, &cmd);
342         bridge->dev_private_data = (void *)(long)cmd;
343         if (cmd & PCI_AGP_COMMAND_AGP) {
344                 printk("uninorth-agp: disabling AGP on bridge %s\n",
345                                 pci_name(pdev));
346                 cmd &= ~PCI_AGP_COMMAND_AGP;
347                 pci_write_config_dword(pdev, agp + PCI_AGP_COMMAND, cmd);
348         }
349         /* turn off the GART */
350         uninorth_cleanup();
351
352         return 0;
353 }
354
355 static int agp_uninorth_resume(struct pci_dev *pdev)
356 {
357         struct agp_bridge_data *bridge;
358         u32 command;
359
360         bridge = agp_find_bridge(pdev);
361         if (bridge == NULL)
362                 return -ENODEV;
363
364         command = (long)bridge->dev_private_data;
365         bridge->dev_private_data = NULL;
366         if (!(command & PCI_AGP_COMMAND_AGP))
367                 return 0;
368
369         uninorth_agp_enable(bridge, command);
370
371         return 0;
372 }
373 #endif /* CONFIG_PM */
374
375 static int uninorth_create_gatt_table(struct agp_bridge_data *bridge)
376 {
377         char *table;
378         char *table_end;
379         int size;
380         int page_order;
381         int num_entries;
382         int i;
383         void *temp;
384         struct page *page;
385
386         /* We can't handle 2 level gatt's */
387         if (bridge->driver->size_type == LVL2_APER_SIZE)
388                 return -EINVAL;
389
390         table = NULL;
391         i = bridge->aperture_size_idx;
392         temp = bridge->current_size;
393         size = page_order = num_entries = 0;
394
395         do {
396                 size = A_SIZE_32(temp)->size;
397                 page_order = A_SIZE_32(temp)->page_order;
398                 num_entries = A_SIZE_32(temp)->num_entries;
399
400                 table = (char *) __get_free_pages(GFP_KERNEL, page_order);
401
402                 if (table == NULL) {
403                         i++;
404                         bridge->current_size = A_IDX32(bridge);
405                 } else {
406                         bridge->aperture_size_idx = i;
407                 }
408         } while (!table && (i < bridge->driver->num_aperture_sizes));
409
410         if (table == NULL)
411                 return -ENOMEM;
412
413         table_end = table + ((PAGE_SIZE * (1 << page_order)) - 1);
414
415         for (page = virt_to_page(table); page <= virt_to_page(table_end); page++)
416                 SetPageReserved(page);
417
418         bridge->gatt_table_real = (u32 *) table;
419         bridge->gatt_table = (u32 *)table;
420         bridge->gatt_bus_addr = virt_to_gart(table);
421
422         for (i = 0; i < num_entries; i++)
423                 bridge->gatt_table[i] = 0;
424
425         flush_dcache_range((unsigned long)table, (unsigned long)table_end);
426
427         return 0;
428 }
429
430 static int uninorth_free_gatt_table(struct agp_bridge_data *bridge)
431 {
432         int page_order;
433         char *table, *table_end;
434         void *temp;
435         struct page *page;
436
437         temp = bridge->current_size;
438         page_order = A_SIZE_32(temp)->page_order;
439
440         /* Do not worry about freeing memory, because if this is
441          * called, then all agp memory is deallocated and removed
442          * from the table.
443          */
444
445         table = (char *) bridge->gatt_table_real;
446         table_end = table + ((PAGE_SIZE * (1 << page_order)) - 1);
447
448         for (page = virt_to_page(table); page <= virt_to_page(table_end); page++)
449                 ClearPageReserved(page);
450
451         free_pages((unsigned long) bridge->gatt_table_real, page_order);
452
453         return 0;
454 }
455
456 void null_cache_flush(void)
457 {
458         mb();
459 }
460
461 /* Setup function */
462
463 static const struct aper_size_info_32 uninorth_sizes[7] =
464 {
465 #if 0 /* Not sure uninorth supports that high aperture sizes */
466         {256, 65536, 6, 64},
467         {128, 32768, 5, 32},
468         {64, 16384, 4, 16},
469 #endif
470         {32, 8192, 3, 8},
471         {16, 4096, 2, 4},
472         {8, 2048, 1, 2},
473         {4, 1024, 0, 1}
474 };
475
476 /*
477  * Not sure that u3 supports that high aperture sizes but it
478  * would strange if it did not :)
479  */
480 static const struct aper_size_info_32 u3_sizes[8] =
481 {
482         {512, 131072, 7, 128},
483         {256, 65536, 6, 64},
484         {128, 32768, 5, 32},
485         {64, 16384, 4, 16},
486         {32, 8192, 3, 8},
487         {16, 4096, 2, 4},
488         {8, 2048, 1, 2},
489         {4, 1024, 0, 1}
490 };
491
492 const struct agp_bridge_driver uninorth_agp_driver = {
493         .owner                  = THIS_MODULE,
494         .aperture_sizes         = (void *)uninorth_sizes,
495         .size_type              = U32_APER_SIZE,
496         .num_aperture_sizes     = 4,
497         .configure              = uninorth_configure,
498         .fetch_size             = uninorth_fetch_size,
499         .cleanup                = uninorth_cleanup,
500         .tlb_flush              = uninorth_tlbflush,
501         .mask_memory            = agp_generic_mask_memory,
502         .masks                  = NULL,
503         .cache_flush            = null_cache_flush,
504         .agp_enable             = uninorth_agp_enable,
505         .create_gatt_table      = uninorth_create_gatt_table,
506         .free_gatt_table        = uninorth_free_gatt_table,
507         .insert_memory          = uninorth_insert_memory,
508         .remove_memory          = agp_generic_remove_memory,
509         .alloc_by_type          = agp_generic_alloc_by_type,
510         .free_by_type           = agp_generic_free_by_type,
511         .agp_alloc_page         = agp_generic_alloc_page,
512         .agp_destroy_page       = agp_generic_destroy_page,
513         .agp_type_to_mask_type  = agp_generic_type_to_mask_type,
514         .cant_use_aperture      = 1,
515 };
516
517 const struct agp_bridge_driver u3_agp_driver = {
518         .owner                  = THIS_MODULE,
519         .aperture_sizes         = (void *)u3_sizes,
520         .size_type              = U32_APER_SIZE,
521         .num_aperture_sizes     = 8,
522         .configure              = uninorth_configure,
523         .fetch_size             = uninorth_fetch_size,
524         .cleanup                = uninorth_cleanup,
525         .tlb_flush              = uninorth_tlbflush,
526         .mask_memory            = agp_generic_mask_memory,
527         .masks                  = NULL,
528         .cache_flush            = null_cache_flush,
529         .agp_enable             = uninorth_agp_enable,
530         .create_gatt_table      = uninorth_create_gatt_table,
531         .free_gatt_table        = uninorth_free_gatt_table,
532         .insert_memory          = u3_insert_memory,
533         .remove_memory          = u3_remove_memory,
534         .alloc_by_type          = agp_generic_alloc_by_type,
535         .free_by_type           = agp_generic_free_by_type,
536         .agp_alloc_page         = agp_generic_alloc_page,
537         .agp_destroy_page       = agp_generic_destroy_page,
538         .agp_type_to_mask_type  = agp_generic_type_to_mask_type,
539         .cant_use_aperture      = 1,
540         .needs_scratch_page     = 1,
541 };
542
543 static struct agp_device_ids uninorth_agp_device_ids[] __devinitdata = {
544         {
545                 .device_id      = PCI_DEVICE_ID_APPLE_UNI_N_AGP,
546                 .chipset_name   = "UniNorth",
547         },
548         {
549                 .device_id      = PCI_DEVICE_ID_APPLE_UNI_N_AGP_P,
550                 .chipset_name   = "UniNorth/Pangea",
551         },
552         {
553                 .device_id      = PCI_DEVICE_ID_APPLE_UNI_N_AGP15,
554                 .chipset_name   = "UniNorth 1.5",
555         },
556         {
557                 .device_id      = PCI_DEVICE_ID_APPLE_UNI_N_AGP2,
558                 .chipset_name   = "UniNorth 2",
559         },
560         {
561                 .device_id      = PCI_DEVICE_ID_APPLE_U3_AGP,
562                 .chipset_name   = "U3",
563         },
564         {
565                 .device_id      = PCI_DEVICE_ID_APPLE_U3L_AGP,
566                 .chipset_name   = "U3L",
567         },
568         {
569                 .device_id      = PCI_DEVICE_ID_APPLE_U3H_AGP,
570                 .chipset_name   = "U3H",
571         },
572         {
573                 .device_id      = PCI_DEVICE_ID_APPLE_IPID2_AGP,
574                 .chipset_name   = "UniNorth/Intrepid2",
575         },
576 };
577
578 static int __devinit agp_uninorth_probe(struct pci_dev *pdev,
579                                         const struct pci_device_id *ent)
580 {
581         struct agp_device_ids *devs = uninorth_agp_device_ids;
582         struct agp_bridge_data *bridge;
583         struct device_node *uninorth_node;
584         u8 cap_ptr;
585         int j;
586
587         cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
588         if (cap_ptr == 0)
589                 return -ENODEV;
590
591         /* probe for known chipsets */
592         for (j = 0; devs[j].chipset_name != NULL; ++j) {
593                 if (pdev->device == devs[j].device_id) {
594                         printk(KERN_INFO PFX "Detected Apple %s chipset\n",
595                                devs[j].chipset_name);
596                         goto found;
597                 }
598         }
599
600         printk(KERN_ERR PFX "Unsupported Apple chipset (device id: %04x).\n",
601                 pdev->device);
602         return -ENODEV;
603
604  found:
605         /* Set revision to 0 if we could not read it. */
606         uninorth_rev = 0;
607         is_u3 = 0;
608         /* Locate core99 Uni-N */
609         uninorth_node = of_find_node_by_name(NULL, "uni-n");
610         /* Locate G5 u3 */
611         if (uninorth_node == NULL) {
612                 is_u3 = 1;
613                 uninorth_node = of_find_node_by_name(NULL, "u3");
614         }
615         if (uninorth_node) {
616                 const int *revprop = of_get_property(uninorth_node,
617                                 "device-rev", NULL);
618                 if (revprop != NULL)
619                         uninorth_rev = *revprop & 0x3f;
620                 of_node_put(uninorth_node);
621         }
622
623 #ifdef CONFIG_PM
624         /* Inform platform of our suspend/resume caps */
625         pmac_register_agp_pm(pdev, agp_uninorth_suspend, agp_uninorth_resume);
626 #endif
627
628         /* Allocate & setup our driver */
629         bridge = agp_alloc_bridge();
630         if (!bridge)
631                 return -ENOMEM;
632
633         if (is_u3)
634                 bridge->driver = &u3_agp_driver;
635         else
636                 bridge->driver = &uninorth_agp_driver;
637
638         bridge->dev = pdev;
639         bridge->capndx = cap_ptr;
640         bridge->flags = AGP_ERRATA_FASTWRITES;
641
642         /* Fill in the mode register */
643         pci_read_config_dword(pdev, cap_ptr+PCI_AGP_STATUS, &bridge->mode);
644
645         pci_set_drvdata(pdev, bridge);
646         return agp_add_bridge(bridge);
647 }
648
649 static void __devexit agp_uninorth_remove(struct pci_dev *pdev)
650 {
651         struct agp_bridge_data *bridge = pci_get_drvdata(pdev);
652
653 #ifdef CONFIG_PM
654         /* Inform platform of our suspend/resume caps */
655         pmac_register_agp_pm(pdev, NULL, NULL);
656 #endif
657
658         agp_remove_bridge(bridge);
659         agp_put_bridge(bridge);
660 }
661
662 static struct pci_device_id agp_uninorth_pci_table[] = {
663         {
664         .class          = (PCI_CLASS_BRIDGE_HOST << 8),
665         .class_mask     = ~0,
666         .vendor         = PCI_VENDOR_ID_APPLE,
667         .device         = PCI_ANY_ID,
668         .subvendor      = PCI_ANY_ID,
669         .subdevice      = PCI_ANY_ID,
670         },
671         { }
672 };
673
674 MODULE_DEVICE_TABLE(pci, agp_uninorth_pci_table);
675
676 static struct pci_driver agp_uninorth_pci_driver = {
677         .name           = "agpgart-uninorth",
678         .id_table       = agp_uninorth_pci_table,
679         .probe          = agp_uninorth_probe,
680         .remove         = agp_uninorth_remove,
681 };
682
683 static int __init agp_uninorth_init(void)
684 {
685         if (agp_off)
686                 return -EINVAL;
687         return pci_register_driver(&agp_uninorth_pci_driver);
688 }
689
690 static void __exit agp_uninorth_cleanup(void)
691 {
692         pci_unregister_driver(&agp_uninorth_pci_driver);
693 }
694
695 module_init(agp_uninorth_init);
696 module_exit(agp_uninorth_cleanup);
697
698 module_param(aperture, charp, 0);
699 MODULE_PARM_DESC(aperture,
700                  "Aperture size, must be power of two between 4MB and an\n"
701                  "\t\tupper limit specific to the UniNorth revision.\n"
702                  "\t\tDefault: 32M");
703
704 MODULE_AUTHOR("Ben Herrenschmidt & Paul Mackerras");
705 MODULE_LICENSE("GPL");