?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Merge branch 'akpm'
[linux-2.6/next.git] / drivers / char / agp / uninorth-agp.c
bloba32c492baf5cc15001ad6882dc25a14d1be86419
1 /*
2 * UniNorth AGPGART routines.
3 */
4 #include <linux/module.h>
5 #include <linux/pci.h>
6 #include <linux/slab.h>
7 #include <linux/init.h>
8 #include <linux/pagemap.h>
9 #include <linux/agp_backend.h>
10 #include <linux/delay.h>
11 #include <linux/vmalloc.h>
12 #include <asm/uninorth.h>
13 #include <asm/pci-bridge.h>
14 #include <asm/prom.h>
15 #include <asm/pmac_feature.h>
16 #include "agp.h"
17
18 /*
19 * NOTES for uninorth3 (G5 AGP) supports :
20 *
21 * There maybe also possibility to have bigger cache line size for
22 * agp (see pmac_pci.c and look for cache line). Need to be investigated
23 * by someone.
24 *
25 * PAGE size are hardcoded but this may change, see asm/page.h.
26 *
27 * Jerome Glisse <j.glisse@gmail.com>
28 */
29 static int uninorth_rev;
30 static int is_u3;
31 static u32 scratch_value;
32
33 #define DEFAULT_APERTURE_SIZE 256
34 #define DEFAULT_APERTURE_STRING "256"
35 static char *aperture = NULL;
36
37 static int uninorth_fetch_size(void)
38 {
39 int i, size = 0;
40 struct aper_size_info_32 *values =
41 A_SIZE_32(agp_bridge->driver->aperture_sizes);
42
43 if (aperture) {
44 char *save = aperture;
45
46 size = memparse(aperture, &aperture) >> 20;
47 aperture = save;
48
49 for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++)
50 if (size == values[i].size)
51 break;
52
53 if (i == agp_bridge->driver->num_aperture_sizes) {
54 dev_err(&agp_bridge->dev->dev, "invalid aperture size, "
55 "using default\n");
56 size = 0;
57 aperture = NULL;
58 }
59 }
60
61 if (!size) {
62 for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++)
63 if (values[i].size == DEFAULT_APERTURE_SIZE)
64 break;
65 }
66
67 agp_bridge->previous_size =
68 agp_bridge->current_size = (void *)(values + i);
69 agp_bridge->aperture_size_idx = i;
70 return values[i].size;
71 }
72
73 static void uninorth_tlbflush(struct agp_memory *mem)
74 {
75 u32 ctrl = UNI_N_CFG_GART_ENABLE;
76
77 if (is_u3)
78 ctrl |= U3_N_CFG_GART_PERFRD;
79 pci_write_config_dword(agp_bridge->dev, UNI_N_CFG_GART_CTRL,
80 ctrl | UNI_N_CFG_GART_INVAL);
81 pci_write_config_dword(agp_bridge->dev, UNI_N_CFG_GART_CTRL, ctrl);
82
83 if (!mem && uninorth_rev <= 0x30) {
84 pci_write_config_dword(agp_bridge->dev, UNI_N_CFG_GART_CTRL,
85 ctrl | UNI_N_CFG_GART_2xRESET);
86 pci_write_config_dword(agp_bridge->dev, UNI_N_CFG_GART_CTRL,
87 ctrl);
88 }
89 }
90
91 static void uninorth_cleanup(void)
92 {
93 u32 tmp;
94
95 pci_read_config_dword(agp_bridge->dev, UNI_N_CFG_GART_CTRL, &tmp);
96 if (!(tmp & UNI_N_CFG_GART_ENABLE))
97 return;
98 tmp |= UNI_N_CFG_GART_INVAL;
99 pci_write_config_dword(agp_bridge->dev, UNI_N_CFG_GART_CTRL, tmp);
100 pci_write_config_dword(agp_bridge->dev, UNI_N_CFG_GART_CTRL, 0);
101
102 if (uninorth_rev <= 0x30) {
103 pci_write_config_dword(agp_bridge->dev, UNI_N_CFG_GART_CTRL,
104 UNI_N_CFG_GART_2xRESET);
105 pci_write_config_dword(agp_bridge->dev, UNI_N_CFG_GART_CTRL,
106 0);
107 }
108 }
109
110 static int uninorth_configure(void)
111 {
112 struct aper_size_info_32 *current_size;
113
114 current_size = A_SIZE_32(agp_bridge->current_size);
115
116 dev_info(&agp_bridge->dev->dev, "configuring for size idx: %d\n",
117 current_size->size_value);
118
119 /* aperture size and gatt addr */
120 pci_write_config_dword(agp_bridge->dev,
121 UNI_N_CFG_GART_BASE,
122 (agp_bridge->gatt_bus_addr & 0xfffff000)
123 | current_size->size_value);
124
125 /* HACK ALERT
126 * UniNorth seem to be buggy enough not to handle properly when
127 * the AGP aperture isn't mapped at bus physical address 0
128 */
129 agp_bridge->gart_bus_addr = 0;
130 #ifdef CONFIG_PPC64
131 /* Assume U3 or later on PPC64 systems */
132 /* high 4 bits of GART physical address go in UNI_N_CFG_AGP_BASE */
133 pci_write_config_dword(agp_bridge->dev, UNI_N_CFG_AGP_BASE,
134 (agp_bridge->gatt_bus_addr >> 32) & 0xf);
135 #else
136 pci_write_config_dword(agp_bridge->dev,
137 UNI_N_CFG_AGP_BASE, agp_bridge->gart_bus_addr);
138 #endif
139
140 if (is_u3) {
141 pci_write_config_dword(agp_bridge->dev,
142 UNI_N_CFG_GART_DUMMY_PAGE,
143 page_to_phys(agp_bridge->scratch_page_page) >> 12);
144 }
145
146 return 0;
147 }
148
149 static int uninorth_insert_memory(struct agp_memory *mem, off_t pg_start, int type)
150 {
151 int i, num_entries;
152 void *temp;
153 u32 *gp;
154 int mask_type;
155
156 if (type != mem->type)
157 return -EINVAL;
158
159 mask_type = agp_bridge->driver->agp_type_to_mask_type(agp_bridge, type);
160 if (mask_type != 0) {
161 /* We know nothing of memory types */
162 return -EINVAL;
163 }
164
165 if (mem->page_count == 0)
166 return 0;
167
168 temp = agp_bridge->current_size;
169 num_entries = A_SIZE_32(temp)->num_entries;
170
171 if ((pg_start + mem->page_count) > num_entries)
172 return -EINVAL;
173
174 gp = (u32 *) &agp_bridge->gatt_table[pg_start];
175 for (i = 0; i < mem->page_count; ++i) {
176 if (gp[i] != scratch_value) {
177 dev_info(&agp_bridge->dev->dev,
178 "uninorth_insert_memory: entry 0x%x occupied (%x)\n",
179 i, gp[i]);
180 return -EBUSY;
181 }
182 }
183
184 for (i = 0; i < mem->page_count; i++) {
185 if (is_u3)
186 gp[i] = (page_to_phys(mem->pages[i]) >> PAGE_SHIFT) | 0x80000000UL;
187 else
188 gp[i] = cpu_to_le32((page_to_phys(mem->pages[i]) & 0xFFFFF000UL) |
189 0x1UL);
190 flush_dcache_range((unsigned long)__va(page_to_phys(mem->pages[i])),
191 (unsigned long)__va(page_to_phys(mem->pages[i]))+0x1000);
192 }
193 mb();
194 uninorth_tlbflush(mem);
195
196 return 0;
197 }
198
199 int uninorth_remove_memory(struct agp_memory *mem, off_t pg_start, int type)
200 {
201 size_t i;
202 u32 *gp;
203 int mask_type;
204
205 if (type != mem->type)
206 return -EINVAL;
207
208 mask_type = agp_bridge->driver->agp_type_to_mask_type(agp_bridge, type);
209 if (mask_type != 0) {
210 /* We know nothing of memory types */
211 return -EINVAL;
212 }
213
214 if (mem->page_count == 0)
215 return 0;
216
217 gp = (u32 *) &agp_bridge->gatt_table[pg_start];
218 for (i = 0; i < mem->page_count; ++i) {
219 gp[i] = scratch_value;
220 }
221 mb();
222 uninorth_tlbflush(mem);
223
224 return 0;
225 }
226
227 static void uninorth_agp_enable(struct agp_bridge_data *bridge, u32 mode)
228 {
229 u32 command, scratch, status;
230 int timeout;
231
232 pci_read_config_dword(bridge->dev,
233 bridge->capndx + PCI_AGP_STATUS,
234 &status);
235
236 command = agp_collect_device_status(bridge, mode, status);
237 command |= PCI_AGP_COMMAND_AGP;
238
239 if (uninorth_rev == 0x21) {
240 /*
241 * Darwin disable AGP 4x on this revision, thus we
242 * may assume it's broken. This is an AGP2 controller.
243 */
244 command &= ~AGPSTAT2_4X;
245 }
246
247 if ((uninorth_rev >= 0x30) && (uninorth_rev <= 0x33)) {
248 /*
249 * We need to set REQ_DEPTH to 7 for U3 versions 1.0, 2.1,
250 * 2.2 and 2.3, Darwin do so.
251 */
252 if ((command >> AGPSTAT_RQ_DEPTH_SHIFT) > 7)
253 command = (command & ~AGPSTAT_RQ_DEPTH)
254 | (7 << AGPSTAT_RQ_DEPTH_SHIFT);
255 }
256
257 uninorth_tlbflush(NULL);
258
259 timeout = 0;
260 do {
261 pci_write_config_dword(bridge->dev,
262 bridge->capndx + PCI_AGP_COMMAND,
263 command);
264 pci_read_config_dword(bridge->dev,
265 bridge->capndx + PCI_AGP_COMMAND,
266 &scratch);
267 } while ((scratch & PCI_AGP_COMMAND_AGP) == 0 && ++timeout < 1000);
268 if ((scratch & PCI_AGP_COMMAND_AGP) == 0)
269 dev_err(&bridge->dev->dev, "can't write UniNorth AGP "
270 "command register\n");
271
272 if (uninorth_rev >= 0x30) {
273 /* This is an AGP V3 */
274 agp_device_command(command, (status & AGPSTAT_MODE_3_0) != 0);
275 } else {
276 /* AGP V2 */
277 agp_device_command(command, false);
278 }
279
280 uninorth_tlbflush(NULL);
281 }
282
283 #ifdef CONFIG_PM
284 /*
285 * These Power Management routines are _not_ called by the normal PCI PM layer,
286 * but directly by the video driver through function pointers in the device
287 * tree.
288 */
289 static int agp_uninorth_suspend(struct pci_dev *pdev)
290 {
291 struct agp_bridge_data *bridge;
292 u32 cmd;
293 u8 agp;
294 struct pci_dev *device = NULL;
295
296 bridge = agp_find_bridge(pdev);
297 if (bridge == NULL)
298 return -ENODEV;
299
300 /* Only one suspend supported */
301 if (bridge->dev_private_data)
302 return 0;
303
304 /* turn off AGP on the video chip, if it was enabled */
305 for_each_pci_dev(device) {
306 /* Don't touch the bridge yet, device first */
307 if (device == pdev)
308 continue;
309 /* Only deal with devices on the same bus here, no Mac has a P2P
310 * bridge on the AGP port, and mucking around the entire PCI
311 * tree is source of problems on some machines because of a bug
312 * in some versions of pci_find_capability() when hitting a dead
313 * device
314 */
315 if (device->bus != pdev->bus)
316 continue;
317 agp = pci_find_capability(device, PCI_CAP_ID_AGP);
318 if (!agp)
319 continue;
320 pci_read_config_dword(device, agp + PCI_AGP_COMMAND, &cmd);
321 if (!(cmd & PCI_AGP_COMMAND_AGP))
322 continue;
323 dev_info(&pdev->dev, "disabling AGP on device %s\n",
324 pci_name(device));
325 cmd &= ~PCI_AGP_COMMAND_AGP;
326 pci_write_config_dword(device, agp + PCI_AGP_COMMAND, cmd);
327 }
328
329 /* turn off AGP on the bridge */
330 agp = pci_find_capability(pdev, PCI_CAP_ID_AGP);
331 pci_read_config_dword(pdev, agp + PCI_AGP_COMMAND, &cmd);
332 bridge->dev_private_data = (void *)(long)cmd;
333 if (cmd & PCI_AGP_COMMAND_AGP) {
334 dev_info(&pdev->dev, "disabling AGP on bridge\n");
335 cmd &= ~PCI_AGP_COMMAND_AGP;
336 pci_write_config_dword(pdev, agp + PCI_AGP_COMMAND, cmd);
337 }
338 /* turn off the GART */
339 uninorth_cleanup();
340
341 return 0;
342 }
343
344 static int agp_uninorth_resume(struct pci_dev *pdev)
345 {
346 struct agp_bridge_data *bridge;
347 u32 command;
348
349 bridge = agp_find_bridge(pdev);
350 if (bridge == NULL)
351 return -ENODEV;
352
353 command = (long)bridge->dev_private_data;
354 bridge->dev_private_data = NULL;
355 if (!(command & PCI_AGP_COMMAND_AGP))
356 return 0;
357
358 uninorth_agp_enable(bridge, command);
359
360 return 0;
361 }
362 #endif /* CONFIG_PM */
363
364 static int uninorth_create_gatt_table(struct agp_bridge_data *bridge)
365 {
366 char *table;
367 char *table_end;
368 int size;
369 int page_order;
370 int num_entries;
371 int i;
372 void *temp;
373 struct page *page;
374 struct page **pages;
375
376 /* We can't handle 2 level gatt's */
377 if (bridge->driver->size_type == LVL2_APER_SIZE)
378 return -EINVAL;
379
380 table = NULL;
381 i = bridge->aperture_size_idx;
382 temp = bridge->current_size;
383 size = page_order = num_entries = 0;
384
385 do {
386 size = A_SIZE_32(temp)->size;
387 page_order = A_SIZE_32(temp)->page_order;
388 num_entries = A_SIZE_32(temp)->num_entries;
389
390 table = (char *) __get_free_pages(GFP_KERNEL, page_order);
391
392 if (table == NULL) {
393 i++;
394 bridge->current_size = A_IDX32(bridge);
395 } else {
396 bridge->aperture_size_idx = i;
397 }
398 } while (!table && (i < bridge->driver->num_aperture_sizes));
399
400 if (table == NULL)
401 return -ENOMEM;
402
403 pages = kmalloc((1 << page_order) * sizeof(struct page*), GFP_KERNEL);
404 if (pages == NULL)
405 goto enomem;
406
407 table_end = table + ((PAGE_SIZE * (1 << page_order)) - 1);
408
409 for (page = virt_to_page(table), i = 0; page <= virt_to_page(table_end);
410 page++, i++) {
411 SetPageReserved(page);
412 pages[i] = page;
413 }
414
415 bridge->gatt_table_real = (u32 *) table;
416 /* Need to clear out any dirty data still sitting in caches */
417 flush_dcache_range((unsigned long)table,
418 (unsigned long)table_end + 1);
419 bridge->gatt_table = vmap(pages, (1 << page_order), 0, PAGE_KERNEL_NCG);
420
421 if (bridge->gatt_table == NULL)
422 goto enomem;
423
424 bridge->gatt_bus_addr = virt_to_phys(table);
425
426 if (is_u3)
427 scratch_value = (page_to_phys(agp_bridge->scratch_page_page) >> PAGE_SHIFT) | 0x80000000UL;
428 else
429 scratch_value = cpu_to_le32((page_to_phys(agp_bridge->scratch_page_page) & 0xFFFFF000UL) |
430 0x1UL);
431 for (i = 0; i < num_entries; i++)
432 bridge->gatt_table[i] = scratch_value;
433
434 return 0;
435
436 enomem:
437 kfree(pages);
438 if (table)
439 free_pages((unsigned long)table, page_order);
440 return -ENOMEM;
441 }
442
443 static int uninorth_free_gatt_table(struct agp_bridge_data *bridge)
444 {
445 int page_order;
446 char *table, *table_end;
447 void *temp;
448 struct page *page;
449
450 temp = bridge->current_size;
451 page_order = A_SIZE_32(temp)->page_order;
452
453 /* Do not worry about freeing memory, because if this is
454 * called, then all agp memory is deallocated and removed
455 * from the table.
456 */
457
458 vunmap(bridge->gatt_table);
459 table = (char *) bridge->gatt_table_real;
460 table_end = table + ((PAGE_SIZE * (1 << page_order)) - 1);
461
462 for (page = virt_to_page(table); page <= virt_to_page(table_end); page++)
463 ClearPageReserved(page);
464
465 free_pages((unsigned long) bridge->gatt_table_real, page_order);
466
467 return 0;
468 }
469
470 void null_cache_flush(void)
471 {
472 mb();
473 }
474
475 /* Setup function */
476
477 static const struct aper_size_info_32 uninorth_sizes[] =
478 {
479 {256, 65536, 6, 64},
480 {128, 32768, 5, 32},
481 {64, 16384, 4, 16},
482 {32, 8192, 3, 8},
483 {16, 4096, 2, 4},
484 {8, 2048, 1, 2},
485 {4, 1024, 0, 1}
486 };
487
488 /*
489 * Not sure that u3 supports that high aperture sizes but it
490 * would strange if it did not :)
491 */
492 static const struct aper_size_info_32 u3_sizes[] =
493 {
494 {512, 131072, 7, 128},
495 {256, 65536, 6, 64},
496 {128, 32768, 5, 32},
497 {64, 16384, 4, 16},
498 {32, 8192, 3, 8},
499 {16, 4096, 2, 4},
500 {8, 2048, 1, 2},
501 {4, 1024, 0, 1}
502 };
503
504 const struct agp_bridge_driver uninorth_agp_driver = {
505 .owner = THIS_MODULE,
506 .aperture_sizes = (void *)uninorth_sizes,
507 .size_type = U32_APER_SIZE,
508 .num_aperture_sizes = ARRAY_SIZE(uninorth_sizes),
509 .configure = uninorth_configure,
510 .fetch_size = uninorth_fetch_size,
511 .cleanup = uninorth_cleanup,
512 .tlb_flush = uninorth_tlbflush,
513 .mask_memory = agp_generic_mask_memory,
514 .masks = NULL,
515 .cache_flush = null_cache_flush,
516 .agp_enable = uninorth_agp_enable,
517 .create_gatt_table = uninorth_create_gatt_table,
518 .free_gatt_table = uninorth_free_gatt_table,
519 .insert_memory = uninorth_insert_memory,
520 .remove_memory = uninorth_remove_memory,
521 .alloc_by_type = agp_generic_alloc_by_type,
522 .free_by_type = agp_generic_free_by_type,
523 .agp_alloc_page = agp_generic_alloc_page,
524 .agp_alloc_pages = agp_generic_alloc_pages,
525 .agp_destroy_page = agp_generic_destroy_page,
526 .agp_destroy_pages = agp_generic_destroy_pages,
527 .agp_type_to_mask_type = agp_generic_type_to_mask_type,
528 .cant_use_aperture = true,
529 .needs_scratch_page = true,
530 };
531
532 const struct agp_bridge_driver u3_agp_driver = {
533 .owner = THIS_MODULE,
534 .aperture_sizes = (void *)u3_sizes,
535 .size_type = U32_APER_SIZE,
536 .num_aperture_sizes = ARRAY_SIZE(u3_sizes),
537 .configure = uninorth_configure,
538 .fetch_size = uninorth_fetch_size,
539 .cleanup = uninorth_cleanup,
540 .tlb_flush = uninorth_tlbflush,
541 .mask_memory = agp_generic_mask_memory,
542 .masks = NULL,
543 .cache_flush = null_cache_flush,
544 .agp_enable = uninorth_agp_enable,
545 .create_gatt_table = uninorth_create_gatt_table,
546 .free_gatt_table = uninorth_free_gatt_table,
547 .insert_memory = uninorth_insert_memory,
548 .remove_memory = uninorth_remove_memory,
549 .alloc_by_type = agp_generic_alloc_by_type,
550 .free_by_type = agp_generic_free_by_type,
551 .agp_alloc_page = agp_generic_alloc_page,
552 .agp_alloc_pages = agp_generic_alloc_pages,
553 .agp_destroy_page = agp_generic_destroy_page,
554 .agp_destroy_pages = agp_generic_destroy_pages,
555 .agp_type_to_mask_type = agp_generic_type_to_mask_type,
556 .cant_use_aperture = true,
557 .needs_scratch_page = true,
558 };
559
560 static struct agp_device_ids uninorth_agp_device_ids[] __devinitdata = {
561 {
562 .device_id = PCI_DEVICE_ID_APPLE_UNI_N_AGP,
563 .chipset_name = "UniNorth",
564 },
565 {
566 .device_id = PCI_DEVICE_ID_APPLE_UNI_N_AGP_P,
567 .chipset_name = "UniNorth/Pangea",
568 },
569 {
570 .device_id = PCI_DEVICE_ID_APPLE_UNI_N_AGP15,
571 .chipset_name = "UniNorth 1.5",
572 },
573 {
574 .device_id = PCI_DEVICE_ID_APPLE_UNI_N_AGP2,
575 .chipset_name = "UniNorth 2",
576 },
577 {
578 .device_id = PCI_DEVICE_ID_APPLE_U3_AGP,
579 .chipset_name = "U3",
580 },
581 {
582 .device_id = PCI_DEVICE_ID_APPLE_U3L_AGP,
583 .chipset_name = "U3L",
584 },
585 {
586 .device_id = PCI_DEVICE_ID_APPLE_U3H_AGP,
587 .chipset_name = "U3H",
588 },
589 {
590 .device_id = PCI_DEVICE_ID_APPLE_IPID2_AGP,
591 .chipset_name = "UniNorth/Intrepid2",
592 },
593 };
594
595 static int __devinit agp_uninorth_probe(struct pci_dev *pdev,
596 const struct pci_device_id *ent)
597 {
598 struct agp_device_ids *devs = uninorth_agp_device_ids;
599 struct agp_bridge_data *bridge;
600 struct device_node *uninorth_node;
601 u8 cap_ptr;
602 int j;
603
604 cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
605 if (cap_ptr == 0)
606 return -ENODEV;
607
608 /* probe for known chipsets */
609 for (j = 0; devs[j].chipset_name != NULL; ++j) {
610 if (pdev->device == devs[j].device_id) {
611 dev_info(&pdev->dev, "Apple %s chipset\n",
612 devs[j].chipset_name);
613 goto found;
614 }
615 }
616
617 dev_err(&pdev->dev, "unsupported Apple chipset [%04x/%04x]\n",
618 pdev->vendor, pdev->device);
619 return -ENODEV;
620
621 found:
622 /* Set revision to 0 if we could not read it. */
623 uninorth_rev = 0;
624 is_u3 = 0;
625 /* Locate core99 Uni-N */
626 uninorth_node = of_find_node_by_name(NULL, "uni-n");
627 /* Locate G5 u3 */
628 if (uninorth_node == NULL) {
629 is_u3 = 1;
630 uninorth_node = of_find_node_by_name(NULL, "u3");
631 }
632 if (uninorth_node) {
633 const int *revprop = of_get_property(uninorth_node,
634 "device-rev", NULL);
635 if (revprop != NULL)
636 uninorth_rev = *revprop & 0x3f;
637 of_node_put(uninorth_node);
638 }
639
640 #ifdef CONFIG_PM
641 /* Inform platform of our suspend/resume caps */
642 pmac_register_agp_pm(pdev, agp_uninorth_suspend, agp_uninorth_resume);
643 #endif
644
645 /* Allocate & setup our driver */
646 bridge = agp_alloc_bridge();
647 if (!bridge)
648 return -ENOMEM;
649
650 if (is_u3)
651 bridge->driver = &u3_agp_driver;
652 else
653 bridge->driver = &uninorth_agp_driver;
654
655 bridge->dev = pdev;
656 bridge->capndx = cap_ptr;
657 bridge->flags = AGP_ERRATA_FASTWRITES;
658
659 /* Fill in the mode register */
660 pci_read_config_dword(pdev, cap_ptr+PCI_AGP_STATUS, &bridge->mode);
661
662 pci_set_drvdata(pdev, bridge);
663 return agp_add_bridge(bridge);
664 }
665
666 static void __devexit agp_uninorth_remove(struct pci_dev *pdev)
667 {
668 struct agp_bridge_data *bridge = pci_get_drvdata(pdev);
669
670 #ifdef CONFIG_PM
671 /* Inform platform of our suspend/resume caps */
672 pmac_register_agp_pm(pdev, NULL, NULL);
673 #endif
674
675 agp_remove_bridge(bridge);
676 agp_put_bridge(bridge);
677 }
678
679 static struct pci_device_id agp_uninorth_pci_table[] = {
680 {
681 .class = (PCI_CLASS_BRIDGE_HOST << 8),
682 .class_mask = ~0,
683 .vendor = PCI_VENDOR_ID_APPLE,
684 .device = PCI_ANY_ID,
685 .subvendor = PCI_ANY_ID,
686 .subdevice = PCI_ANY_ID,
687 },
688 { }
689 };
690
691 MODULE_DEVICE_TABLE(pci, agp_uninorth_pci_table);
692
693 static struct pci_driver agp_uninorth_pci_driver = {
694 .name = "agpgart-uninorth",
695 .id_table = agp_uninorth_pci_table,
696 .probe = agp_uninorth_probe,
697 .remove = agp_uninorth_remove,
698 };
699
700 static int __init agp_uninorth_init(void)
701 {
702 if (agp_off)
703 return -EINVAL;
704 return pci_register_driver(&agp_uninorth_pci_driver);
705 }
706
707 static void __exit agp_uninorth_cleanup(void)
708 {
709 pci_unregister_driver(&agp_uninorth_pci_driver);
710 }
711
712 module_init(agp_uninorth_init);
713 module_exit(agp_uninorth_cleanup);
714
715 module_param(aperture, charp, 0);
716 MODULE_PARM_DESC(aperture,
717 "Aperture size, must be power of two between 4MB and an\n"
718 "\t\tupper limit specific to the UniNorth revision.\n"
719 "\t\tDefault: " DEFAULT_APERTURE_STRING "M");
720
721 MODULE_AUTHOR("Ben Herrenschmidt & Paul Mackerras");
722 MODULE_LICENSE("GPL");
linux-next