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16#include <linux/string.h>
17#include <linux/kernel.h>
18#include <linux/pci.h>
19#include <linux/pci_ids.h>
20#include <linux/init.h>
21#include <linux/module.h>
22#include <linux/slab.h>
23#include <linux/of_address.h>
24#include <linux/of_irq.h>
25
26#include <asm/machdep.h>
27#include <asm/macio.h>
28#include <asm/pmac_feature.h>
29#include <asm/prom.h>
30
31#undef DEBUG
32
33#define MAX_NODE_NAME_SIZE (20 - 12)
34
35static struct macio_chip *macio_on_hold;
36
37static int macio_bus_match(struct device *dev, struct device_driver *drv)
38{
39 const struct of_device_id * matches = drv->of_match_table;
40
41 if (!matches)
42 return 0;
43
44 return of_match_device(matches, dev) != NULL;
45}
46
47struct macio_dev *macio_dev_get(struct macio_dev *dev)
48{
49 struct device *tmp;
50
51 if (!dev)
52 return NULL;
53 tmp = get_device(&dev->ofdev.dev);
54 if (tmp)
55 return to_macio_device(tmp);
56 else
57 return NULL;
58}
59
60void macio_dev_put(struct macio_dev *dev)
61{
62 if (dev)
63 put_device(&dev->ofdev.dev);
64}
65
66
67static int macio_device_probe(struct device *dev)
68{
69 int error = -ENODEV;
70 struct macio_driver *drv;
71 struct macio_dev *macio_dev;
72 const struct of_device_id *match;
73
74 drv = to_macio_driver(dev->driver);
75 macio_dev = to_macio_device(dev);
76
77 if (!drv->probe)
78 return error;
79
80 macio_dev_get(macio_dev);
81
82 match = of_match_device(drv->driver.of_match_table, dev);
83 if (match)
84 error = drv->probe(macio_dev, match);
85 if (error)
86 macio_dev_put(macio_dev);
87
88 return error;
89}
90
91static void macio_device_remove(struct device *dev)
92{
93 struct macio_dev * macio_dev = to_macio_device(dev);
94 struct macio_driver * drv = to_macio_driver(dev->driver);
95
96 if (dev->driver && drv->remove)
97 drv->remove(macio_dev);
98 macio_dev_put(macio_dev);
99}
100
101static void macio_device_shutdown(struct device *dev)
102{
103 struct macio_dev * macio_dev = to_macio_device(dev);
104 struct macio_driver * drv = to_macio_driver(dev->driver);
105
106 if (dev->driver && drv->shutdown)
107 drv->shutdown(macio_dev);
108}
109
110static int macio_device_suspend(struct device *dev, pm_message_t state)
111{
112 struct macio_dev * macio_dev = to_macio_device(dev);
113 struct macio_driver * drv = to_macio_driver(dev->driver);
114
115 if (dev->driver && drv->suspend)
116 return drv->suspend(macio_dev, state);
117 return 0;
118}
119
120static int macio_device_resume(struct device * dev)
121{
122 struct macio_dev * macio_dev = to_macio_device(dev);
123 struct macio_driver * drv = to_macio_driver(dev->driver);
124
125 if (dev->driver && drv->resume)
126 return drv->resume(macio_dev);
127 return 0;
128}
129
130extern const struct attribute_group *macio_dev_groups[];
131
132struct bus_type macio_bus_type = {
133 .name = "macio",
134 .match = macio_bus_match,
135 .uevent = of_device_uevent_modalias,
136 .probe = macio_device_probe,
137 .remove = macio_device_remove,
138 .shutdown = macio_device_shutdown,
139 .suspend = macio_device_suspend,
140 .resume = macio_device_resume,
141 .dev_groups = macio_dev_groups,
142};
143
144static int __init macio_bus_driver_init(void)
145{
146 return bus_register(&macio_bus_type);
147}
148
149postcore_initcall(macio_bus_driver_init);
150
151
152
153
154
155
156
157
158
159
160
161
162static void macio_release_dev(struct device *dev)
163{
164 struct macio_dev *mdev;
165
166 mdev = to_macio_device(dev);
167 kfree(mdev);
168}
169
170
171
172
173
174
175
176
177
178
179static int macio_resource_quirks(struct device_node *np, struct resource *res,
180 int index)
181{
182
183 if ((res->flags & IORESOURCE_MEM) == 0)
184 return 0;
185
186
187 if (index == 0 && of_node_name_eq(np, "gc"))
188 res->end = res->start + 0x1ffff;
189
190
191 if (index >= 2 && of_node_name_eq(np, "radio"))
192 return 1;
193
194#ifndef CONFIG_PPC64
195
196 if ((res->start & 0x0001f000) == 0x00008000)
197 res->end = res->start + 0xff;
198#endif
199
200
201
202
203
204 if (of_node_name_eq(np, "escc"))
205 return 1;
206
207
208 if (index >= 3 && (of_node_name_eq(np, "ch-a") ||
209 of_node_name_eq(np, "ch-b")))
210 return 1;
211
212
213 if (index > 0 && of_node_name_eq(np, "media-bay"))
214 return 1;
215
216
217 if (of_node_name_eq(np, "IDE") || of_node_name_eq(np, "ATA") ||
218 of_node_is_type(np, "ide") || of_node_is_type(np, "ata")) {
219 if (index == 0 && (res->end - res->start) > 0xfff)
220 res->end = res->start + 0xfff;
221 if (index == 1 && (res->end - res->start) > 0xff)
222 res->end = res->start + 0xff;
223 }
224 return 0;
225}
226
227static void macio_create_fixup_irq(struct macio_dev *dev, int index,
228 unsigned int line)
229{
230 unsigned int irq;
231
232 irq = irq_create_mapping(NULL, line);
233 if (!irq) {
234 dev->interrupt[index].start = irq;
235 dev->interrupt[index].flags = IORESOURCE_IRQ;
236 dev->interrupt[index].name = dev_name(&dev->ofdev.dev);
237 }
238 if (dev->n_interrupts <= index)
239 dev->n_interrupts = index + 1;
240}
241
242static void macio_add_missing_resources(struct macio_dev *dev)
243{
244 struct device_node *np = dev->ofdev.dev.of_node;
245 unsigned int irq_base;
246
247
248 if (dev->bus->chip->type != macio_gatwick)
249 return;
250
251
252
253
254 irq_base = 64;
255
256
257 if (of_node_name_eq(np, "ch-a")) {
258 macio_create_fixup_irq(dev, 0, 15 + irq_base);
259 macio_create_fixup_irq(dev, 1, 4 + irq_base);
260 macio_create_fixup_irq(dev, 2, 5 + irq_base);
261 printk(KERN_INFO "macio: fixed SCC irqs on gatwick\n");
262 }
263
264
265 if (of_node_name_eq(np, "media-bay")) {
266 macio_create_fixup_irq(dev, 0, 29 + irq_base);
267 printk(KERN_INFO "macio: fixed media-bay irq on gatwick\n");
268 }
269
270
271 if (dev->media_bay != NULL && of_node_name_eq(np, "floppy")) {
272 macio_create_fixup_irq(dev, 0, 19 + irq_base);
273 macio_create_fixup_irq(dev, 1, 1 + irq_base);
274 printk(KERN_INFO "macio: fixed left floppy irqs\n");
275 }
276 if (dev->media_bay != NULL && of_node_name_eq(np, "ata4")) {
277 macio_create_fixup_irq(dev, 0, 14 + irq_base);
278 macio_create_fixup_irq(dev, 0, 3 + irq_base);
279 printk(KERN_INFO "macio: fixed left ide irqs\n");
280 }
281}
282
283static void macio_setup_interrupts(struct macio_dev *dev)
284{
285 struct device_node *np = dev->ofdev.dev.of_node;
286 unsigned int irq;
287 int i = 0, j = 0;
288
289 for (;;) {
290 struct resource *res;
291
292 if (j >= MACIO_DEV_COUNT_IRQS)
293 break;
294 res = &dev->interrupt[j];
295 irq = irq_of_parse_and_map(np, i++);
296 if (!irq)
297 break;
298 res->start = irq;
299 res->flags = IORESOURCE_IRQ;
300 res->name = dev_name(&dev->ofdev.dev);
301 if (macio_resource_quirks(np, res, i - 1)) {
302 memset(res, 0, sizeof(struct resource));
303 continue;
304 } else
305 j++;
306 }
307 dev->n_interrupts = j;
308}
309
310static void macio_setup_resources(struct macio_dev *dev,
311 struct resource *parent_res)
312{
313 struct device_node *np = dev->ofdev.dev.of_node;
314 struct resource r;
315 int index;
316
317 for (index = 0; of_address_to_resource(np, index, &r) == 0; index++) {
318 struct resource *res;
319 if (index >= MACIO_DEV_COUNT_RESOURCES)
320 break;
321 res = &dev->resource[index];
322 *res = r;
323 res->name = dev_name(&dev->ofdev.dev);
324
325 if (macio_resource_quirks(np, res, index)) {
326 memset(res, 0, sizeof(struct resource));
327 continue;
328 }
329
330
331
332
333 if (insert_resource(parent_res, res)) {
334 printk(KERN_WARNING "Can't request resource "
335 "%d for MacIO device %s\n",
336 index, dev_name(&dev->ofdev.dev));
337 }
338 }
339 dev->n_resources = index;
340}
341
342
343
344
345
346
347
348
349
350
351static struct macio_dev * macio_add_one_device(struct macio_chip *chip,
352 struct device *parent,
353 struct device_node *np,
354 struct macio_dev *in_bay,
355 struct resource *parent_res)
356{
357 char name[MAX_NODE_NAME_SIZE + 1];
358 struct macio_dev *dev;
359 const u32 *reg;
360
361 if (np == NULL)
362 return NULL;
363
364 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
365 if (!dev)
366 return NULL;
367
368 dev->bus = &chip->lbus;
369 dev->media_bay = in_bay;
370 dev->ofdev.dev.of_node = np;
371 dev->ofdev.archdata.dma_mask = 0xffffffffUL;
372 dev->ofdev.dev.dma_mask = &dev->ofdev.archdata.dma_mask;
373 dev->ofdev.dev.coherent_dma_mask = dev->ofdev.archdata.dma_mask;
374 dev->ofdev.dev.parent = parent;
375 dev->ofdev.dev.bus = &macio_bus_type;
376 dev->ofdev.dev.release = macio_release_dev;
377 dev->ofdev.dev.dma_parms = &dev->dma_parms;
378
379
380 dma_set_max_seg_size(&dev->ofdev.dev, 65536);
381 dma_set_seg_boundary(&dev->ofdev.dev, 0xffffffff);
382
383#if defined(CONFIG_PCI) && defined(CONFIG_DMA_OPS)
384
385
386
387
388
389
390 dev->ofdev.dev.archdata = chip->lbus.pdev->dev.archdata;
391 dev->ofdev.dev.dma_ops = chip->lbus.pdev->dev.dma_ops;
392#endif
393
394#ifdef DEBUG
395 printk("preparing mdev @%p, ofdev @%p, dev @%p, kobj @%p\n",
396 dev, &dev->ofdev, &dev->ofdev.dev, &dev->ofdev.dev.kobj);
397#endif
398
399
400 snprintf(name, sizeof(name), "%pOFn", np);
401 if (np == chip->of_node) {
402 dev_set_name(&dev->ofdev.dev, "%1d.%08x:%.*s",
403 chip->lbus.index,
404#ifdef CONFIG_PCI
405 (unsigned int)pci_resource_start(chip->lbus.pdev, 0),
406#else
407 0,
408#endif
409 MAX_NODE_NAME_SIZE, name);
410 } else {
411 reg = of_get_property(np, "reg", NULL);
412 dev_set_name(&dev->ofdev.dev, "%1d.%08x:%.*s",
413 chip->lbus.index,
414 reg ? *reg : 0, MAX_NODE_NAME_SIZE, name);
415 }
416
417
418 macio_setup_interrupts(dev);
419 macio_setup_resources(dev, parent_res);
420 macio_add_missing_resources(dev);
421
422
423 if (of_device_register(&dev->ofdev) != 0) {
424 printk(KERN_DEBUG"macio: device registration error for %s!\n",
425 dev_name(&dev->ofdev.dev));
426 kfree(dev);
427 return NULL;
428 }
429
430 return dev;
431}
432
433static int macio_skip_device(struct device_node *np)
434{
435 return of_node_name_prefix(np, "battery") ||
436 of_node_name_prefix(np, "escc-legacy");
437}
438
439
440
441
442
443
444
445
446
447
448
449
450static void macio_pci_add_devices(struct macio_chip *chip)
451{
452 struct device_node *np, *pnode;
453 struct macio_dev *rdev, *mdev, *mbdev = NULL, *sdev = NULL;
454 struct device *parent = NULL;
455 struct resource *root_res = &iomem_resource;
456
457
458#ifdef CONFIG_PCI
459 if (chip->lbus.pdev) {
460 parent = &chip->lbus.pdev->dev;
461 root_res = &chip->lbus.pdev->resource[0];
462 }
463#endif
464 pnode = of_node_get(chip->of_node);
465 if (pnode == NULL)
466 return;
467
468
469 rdev = macio_add_one_device(chip, parent, pnode, NULL, root_res);
470 if (rdev == NULL)
471 return;
472 root_res = &rdev->resource[0];
473
474
475 for (np = NULL; (np = of_get_next_child(pnode, np)) != NULL;) {
476 if (macio_skip_device(np))
477 continue;
478 of_node_get(np);
479 mdev = macio_add_one_device(chip, &rdev->ofdev.dev, np, NULL,
480 root_res);
481 if (mdev == NULL)
482 of_node_put(np);
483 else if (of_node_name_prefix(np, "media-bay"))
484 mbdev = mdev;
485 else if (of_node_name_prefix(np, "escc"))
486 sdev = mdev;
487 }
488
489
490 if (mbdev) {
491 pnode = mbdev->ofdev.dev.of_node;
492 for (np = NULL; (np = of_get_next_child(pnode, np)) != NULL;) {
493 if (macio_skip_device(np))
494 continue;
495 of_node_get(np);
496 if (macio_add_one_device(chip, &mbdev->ofdev.dev, np,
497 mbdev, root_res) == NULL)
498 of_node_put(np);
499 }
500 }
501
502
503 if (sdev) {
504 pnode = sdev->ofdev.dev.of_node;
505 for (np = NULL; (np = of_get_next_child(pnode, np)) != NULL;) {
506 if (macio_skip_device(np))
507 continue;
508 of_node_get(np);
509 if (macio_add_one_device(chip, &sdev->ofdev.dev, np,
510 NULL, root_res) == NULL)
511 of_node_put(np);
512 }
513 }
514}
515
516
517
518
519
520
521int macio_register_driver(struct macio_driver *drv)
522{
523
524 drv->driver.bus = &macio_bus_type;
525
526
527 return driver_register(&drv->driver);
528}
529
530
531
532
533
534void macio_unregister_driver(struct macio_driver *drv)
535{
536 driver_unregister(&drv->driver);
537}
538
539
540struct macio_devres {
541 u32 res_mask;
542};
543
544static void maciom_release(struct device *gendev, void *res)
545{
546 struct macio_dev *dev = to_macio_device(gendev);
547 struct macio_devres *dr = res;
548 int i, max;
549
550 max = min(dev->n_resources, 32);
551 for (i = 0; i < max; i++) {
552 if (dr->res_mask & (1 << i))
553 macio_release_resource(dev, i);
554 }
555}
556
557int macio_enable_devres(struct macio_dev *dev)
558{
559 struct macio_devres *dr;
560
561 dr = devres_find(&dev->ofdev.dev, maciom_release, NULL, NULL);
562 if (!dr) {
563 dr = devres_alloc(maciom_release, sizeof(*dr), GFP_KERNEL);
564 if (!dr)
565 return -ENOMEM;
566 }
567 return devres_get(&dev->ofdev.dev, dr, NULL, NULL) != NULL;
568}
569
570static struct macio_devres * find_macio_dr(struct macio_dev *dev)
571{
572 return devres_find(&dev->ofdev.dev, maciom_release, NULL, NULL);
573}
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589int macio_request_resource(struct macio_dev *dev, int resource_no,
590 const char *name)
591{
592 struct macio_devres *dr = find_macio_dr(dev);
593
594 if (macio_resource_len(dev, resource_no) == 0)
595 return 0;
596
597 if (!request_mem_region(macio_resource_start(dev, resource_no),
598 macio_resource_len(dev, resource_no),
599 name))
600 goto err_out;
601
602 if (dr && resource_no < 32)
603 dr->res_mask |= 1 << resource_no;
604
605 return 0;
606
607err_out:
608 printk (KERN_WARNING "MacIO: Unable to reserve resource #%d:%lx@%lx"
609 " for device %s\n",
610 resource_no,
611 macio_resource_len(dev, resource_no),
612 macio_resource_start(dev, resource_no),
613 dev_name(&dev->ofdev.dev));
614 return -EBUSY;
615}
616
617
618
619
620
621
622void macio_release_resource(struct macio_dev *dev, int resource_no)
623{
624 struct macio_devres *dr = find_macio_dr(dev);
625
626 if (macio_resource_len(dev, resource_no) == 0)
627 return;
628 release_mem_region(macio_resource_start(dev, resource_no),
629 macio_resource_len(dev, resource_no));
630 if (dr && resource_no < 32)
631 dr->res_mask &= ~(1 << resource_no);
632}
633
634
635
636
637
638
639
640
641
642
643
644
645
646int macio_request_resources(struct macio_dev *dev, const char *name)
647{
648 int i;
649
650 for (i = 0; i < dev->n_resources; i++)
651 if (macio_request_resource(dev, i, name))
652 goto err_out;
653 return 0;
654
655err_out:
656 while(--i >= 0)
657 macio_release_resource(dev, i);
658
659 return -EBUSY;
660}
661
662
663
664
665
666
667void macio_release_resources(struct macio_dev *dev)
668{
669 int i;
670
671 for (i = 0; i < dev->n_resources; i++)
672 macio_release_resource(dev, i);
673}
674
675
676#ifdef CONFIG_PCI
677
678static int macio_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
679{
680 struct device_node* np;
681 struct macio_chip* chip;
682
683 if (ent->vendor != PCI_VENDOR_ID_APPLE)
684 return -ENODEV;
685
686
687
688
689 np = pci_device_to_OF_node(pdev);
690 if (np == NULL)
691 return -ENODEV;
692
693
694
695
696 of_node_get(np);
697
698
699
700
701 chip = macio_find(np, macio_unknown);
702 of_node_put(np);
703 if (chip == NULL)
704 return -ENODEV;
705
706
707 if (chip->lbus.pdev == NULL) {
708 chip->lbus.pdev = pdev;
709 chip->lbus.chip = chip;
710 pci_set_drvdata(pdev, &chip->lbus);
711 pci_set_master(pdev);
712 }
713
714 printk(KERN_INFO "MacIO PCI driver attached to %s chipset\n",
715 chip->name);
716
717
718
719
720
721
722
723 if (chip->type == macio_gatwick || chip->type == macio_ohareII)
724 if (macio_chips[0].lbus.pdev == NULL) {
725 macio_on_hold = chip;
726 return 0;
727 }
728
729 macio_pci_add_devices(chip);
730 if (macio_on_hold && macio_chips[0].lbus.pdev != NULL) {
731 macio_pci_add_devices(macio_on_hold);
732 macio_on_hold = NULL;
733 }
734
735 return 0;
736}
737
738static void macio_pci_remove(struct pci_dev* pdev)
739{
740 panic("removing of macio-asic not supported !\n");
741}
742
743
744
745
746
747static const struct pci_device_id pci_ids[] = { {
748 .vendor = PCI_VENDOR_ID_APPLE,
749 .device = PCI_ANY_ID,
750 .subvendor = PCI_ANY_ID,
751 .subdevice = PCI_ANY_ID,
752
753 }, { }
754};
755MODULE_DEVICE_TABLE (pci, pci_ids);
756
757
758static struct pci_driver macio_pci_driver = {
759 .name = (char *) "macio",
760 .id_table = pci_ids,
761
762 .probe = macio_pci_probe,
763 .remove = macio_pci_remove,
764};
765
766#endif
767
768static int __init macio_module_init (void)
769{
770#ifdef CONFIG_PCI
771 int rc;
772
773 rc = pci_register_driver(&macio_pci_driver);
774 if (rc)
775 return rc;
776#endif
777 return 0;
778}
779
780module_init(macio_module_init);
781
782EXPORT_SYMBOL(macio_register_driver);
783EXPORT_SYMBOL(macio_unregister_driver);
784EXPORT_SYMBOL(macio_dev_get);
785EXPORT_SYMBOL(macio_dev_put);
786EXPORT_SYMBOL(macio_request_resource);
787EXPORT_SYMBOL(macio_release_resource);
788EXPORT_SYMBOL(macio_request_resources);
789EXPORT_SYMBOL(macio_release_resources);
790EXPORT_SYMBOL(macio_enable_devres);
791
792