1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20#include <linux/string.h>
21#include <linux/kernel.h>
22#include <linux/pci.h>
23#include <linux/pci_ids.h>
24#include <linux/init.h>
25#include <linux/module.h>
26#include <linux/slab.h>
27#include <linux/of_address.h>
28#include <linux/of_irq.h>
29
30#include <asm/machdep.h>
31#include <asm/macio.h>
32#include <asm/pmac_feature.h>
33#include <asm/prom.h>
34
35#undef DEBUG
36
37#define MAX_NODE_NAME_SIZE (20 - 12)
38
39static struct macio_chip *macio_on_hold;
40
41static int macio_bus_match(struct device *dev, struct device_driver *drv)
42{
43 const struct of_device_id * matches = drv->of_match_table;
44
45 if (!matches)
46 return 0;
47
48 return of_match_device(matches, dev) != NULL;
49}
50
51struct macio_dev *macio_dev_get(struct macio_dev *dev)
52{
53 struct device *tmp;
54
55 if (!dev)
56 return NULL;
57 tmp = get_device(&dev->ofdev.dev);
58 if (tmp)
59 return to_macio_device(tmp);
60 else
61 return NULL;
62}
63
64void macio_dev_put(struct macio_dev *dev)
65{
66 if (dev)
67 put_device(&dev->ofdev.dev);
68}
69
70
71static int macio_device_probe(struct device *dev)
72{
73 int error = -ENODEV;
74 struct macio_driver *drv;
75 struct macio_dev *macio_dev;
76 const struct of_device_id *match;
77
78 drv = to_macio_driver(dev->driver);
79 macio_dev = to_macio_device(dev);
80
81 if (!drv->probe)
82 return error;
83
84 macio_dev_get(macio_dev);
85
86 match = of_match_device(drv->driver.of_match_table, dev);
87 if (match)
88 error = drv->probe(macio_dev, match);
89 if (error)
90 macio_dev_put(macio_dev);
91
92 return error;
93}
94
95static int macio_device_remove(struct device *dev)
96{
97 struct macio_dev * macio_dev = to_macio_device(dev);
98 struct macio_driver * drv = to_macio_driver(dev->driver);
99
100 if (dev->driver && drv->remove)
101 drv->remove(macio_dev);
102 macio_dev_put(macio_dev);
103
104 return 0;
105}
106
107static void macio_device_shutdown(struct device *dev)
108{
109 struct macio_dev * macio_dev = to_macio_device(dev);
110 struct macio_driver * drv = to_macio_driver(dev->driver);
111
112 if (dev->driver && drv->shutdown)
113 drv->shutdown(macio_dev);
114}
115
116static int macio_device_suspend(struct device *dev, pm_message_t state)
117{
118 struct macio_dev * macio_dev = to_macio_device(dev);
119 struct macio_driver * drv = to_macio_driver(dev->driver);
120
121 if (dev->driver && drv->suspend)
122 return drv->suspend(macio_dev, state);
123 return 0;
124}
125
126static int macio_device_resume(struct device * dev)
127{
128 struct macio_dev * macio_dev = to_macio_device(dev);
129 struct macio_driver * drv = to_macio_driver(dev->driver);
130
131 if (dev->driver && drv->resume)
132 return drv->resume(macio_dev);
133 return 0;
134}
135
136extern const struct attribute_group *macio_dev_groups[];
137
138struct bus_type macio_bus_type = {
139 .name = "macio",
140 .match = macio_bus_match,
141 .uevent = of_device_uevent_modalias,
142 .probe = macio_device_probe,
143 .remove = macio_device_remove,
144 .shutdown = macio_device_shutdown,
145 .suspend = macio_device_suspend,
146 .resume = macio_device_resume,
147 .dev_groups = macio_dev_groups,
148};
149
150static int __init macio_bus_driver_init(void)
151{
152 return bus_register(&macio_bus_type);
153}
154
155postcore_initcall(macio_bus_driver_init);
156
157
158
159
160
161
162
163
164
165
166
167
168static void macio_release_dev(struct device *dev)
169{
170 struct macio_dev *mdev;
171
172 mdev = to_macio_device(dev);
173 kfree(mdev);
174}
175
176
177
178
179
180
181
182
183
184
185static int macio_resource_quirks(struct device_node *np, struct resource *res,
186 int index)
187{
188
189 if ((res->flags & IORESOURCE_MEM) == 0)
190 return 0;
191
192
193 if (index == 0 && !strcmp(np->name, "gc"))
194 res->end = res->start + 0x1ffff;
195
196
197 if (index >= 2 && !strcmp(np->name, "radio"))
198 return 1;
199
200#ifndef CONFIG_PPC64
201
202 if ((res->start & 0x0001f000) == 0x00008000)
203 res->end = res->start + 0xff;
204#endif
205
206
207
208
209
210 if (!strcmp(np->name, "escc"))
211 return 1;
212
213
214 if (index >= 3 && !(strcmp(np->name, "ch-a") &&
215 strcmp(np->name, "ch-b")))
216 return 1;
217
218
219 if (index > 0 && !strcmp(np->name, "media-bay"))
220 return 1;
221
222
223 if (!(strcmp(np->name, "IDE") && strcmp(np->name, "ATA") &&
224 strcmp(np->type, "ide") && strcmp(np->type, "ata"))) {
225 if (index == 0 && (res->end - res->start) > 0xfff)
226 res->end = res->start + 0xfff;
227 if (index == 1 && (res->end - res->start) > 0xff)
228 res->end = res->start + 0xff;
229 }
230 return 0;
231}
232
233static void macio_create_fixup_irq(struct macio_dev *dev, int index,
234 unsigned int line)
235{
236 unsigned int irq;
237
238 irq = irq_create_mapping(NULL, line);
239 if (!irq) {
240 dev->interrupt[index].start = irq;
241 dev->interrupt[index].flags = IORESOURCE_IRQ;
242 dev->interrupt[index].name = dev_name(&dev->ofdev.dev);
243 }
244 if (dev->n_interrupts <= index)
245 dev->n_interrupts = index + 1;
246}
247
248static void macio_add_missing_resources(struct macio_dev *dev)
249{
250 struct device_node *np = dev->ofdev.dev.of_node;
251 unsigned int irq_base;
252
253
254 if (dev->bus->chip->type != macio_gatwick)
255 return;
256
257
258
259
260 irq_base = 64;
261
262
263 if (strcmp(np->name, "ch-a") == 0) {
264 macio_create_fixup_irq(dev, 0, 15 + irq_base);
265 macio_create_fixup_irq(dev, 1, 4 + irq_base);
266 macio_create_fixup_irq(dev, 2, 5 + irq_base);
267 printk(KERN_INFO "macio: fixed SCC irqs on gatwick\n");
268 }
269
270
271 if (strcmp(np->name, "media-bay") == 0) {
272 macio_create_fixup_irq(dev, 0, 29 + irq_base);
273 printk(KERN_INFO "macio: fixed media-bay irq on gatwick\n");
274 }
275
276
277 if (dev->media_bay != NULL && strcmp(np->name, "floppy") == 0) {
278 macio_create_fixup_irq(dev, 0, 19 + irq_base);
279 macio_create_fixup_irq(dev, 1, 1 + irq_base);
280 printk(KERN_INFO "macio: fixed left floppy irqs\n");
281 }
282 if (dev->media_bay != NULL && strcasecmp(np->name, "ata4") == 0) {
283 macio_create_fixup_irq(dev, 0, 14 + irq_base);
284 macio_create_fixup_irq(dev, 0, 3 + irq_base);
285 printk(KERN_INFO "macio: fixed left ide irqs\n");
286 }
287}
288
289static void macio_setup_interrupts(struct macio_dev *dev)
290{
291 struct device_node *np = dev->ofdev.dev.of_node;
292 unsigned int irq;
293 int i = 0, j = 0;
294
295 for (;;) {
296 struct resource *res;
297
298 if (j >= MACIO_DEV_COUNT_IRQS)
299 break;
300 res = &dev->interrupt[j];
301 irq = irq_of_parse_and_map(np, i++);
302 if (!irq)
303 break;
304 res->start = irq;
305 res->flags = IORESOURCE_IRQ;
306 res->name = dev_name(&dev->ofdev.dev);
307 if (macio_resource_quirks(np, res, i - 1)) {
308 memset(res, 0, sizeof(struct resource));
309 continue;
310 } else
311 j++;
312 }
313 dev->n_interrupts = j;
314}
315
316static void macio_setup_resources(struct macio_dev *dev,
317 struct resource *parent_res)
318{
319 struct device_node *np = dev->ofdev.dev.of_node;
320 struct resource r;
321 int index;
322
323 for (index = 0; of_address_to_resource(np, index, &r) == 0; index++) {
324 struct resource *res;
325 if (index >= MACIO_DEV_COUNT_RESOURCES)
326 break;
327 res = &dev->resource[index];
328 *res = r;
329 res->name = dev_name(&dev->ofdev.dev);
330
331 if (macio_resource_quirks(np, res, index)) {
332 memset(res, 0, sizeof(struct resource));
333 continue;
334 }
335
336
337
338
339 if (insert_resource(parent_res, res)) {
340 printk(KERN_WARNING "Can't request resource "
341 "%d for MacIO device %s\n",
342 index, dev_name(&dev->ofdev.dev));
343 }
344 }
345 dev->n_resources = index;
346}
347
348
349
350
351
352
353
354
355
356
357static struct macio_dev * macio_add_one_device(struct macio_chip *chip,
358 struct device *parent,
359 struct device_node *np,
360 struct macio_dev *in_bay,
361 struct resource *parent_res)
362{
363 struct macio_dev *dev;
364 const u32 *reg;
365
366 if (np == NULL)
367 return NULL;
368
369 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
370 if (!dev)
371 return NULL;
372
373 dev->bus = &chip->lbus;
374 dev->media_bay = in_bay;
375 dev->ofdev.dev.of_node = np;
376 dev->ofdev.archdata.dma_mask = 0xffffffffUL;
377 dev->ofdev.dev.dma_mask = &dev->ofdev.archdata.dma_mask;
378 dev->ofdev.dev.coherent_dma_mask = dev->ofdev.archdata.dma_mask;
379 dev->ofdev.dev.parent = parent;
380 dev->ofdev.dev.bus = &macio_bus_type;
381 dev->ofdev.dev.release = macio_release_dev;
382 dev->ofdev.dev.dma_parms = &dev->dma_parms;
383
384
385 dma_set_max_seg_size(&dev->ofdev.dev, 65536);
386 dma_set_seg_boundary(&dev->ofdev.dev, 0xffffffff);
387
388#ifdef CONFIG_PCI
389
390
391
392
393
394
395 dev->ofdev.dev.archdata = chip->lbus.pdev->dev.archdata;
396 dev->ofdev.dev.dma_ops = chip->lbus.pdev->dev.dma_ops;
397#endif
398
399#ifdef DEBUG
400 printk("preparing mdev @%p, ofdev @%p, dev @%p, kobj @%p\n",
401 dev, &dev->ofdev, &dev->ofdev.dev, &dev->ofdev.dev.kobj);
402#endif
403
404
405 if (np == chip->of_node) {
406 dev_set_name(&dev->ofdev.dev, "%1d.%08x:%.*s",
407 chip->lbus.index,
408#ifdef CONFIG_PCI
409 (unsigned int)pci_resource_start(chip->lbus.pdev, 0),
410#else
411 0,
412#endif
413 MAX_NODE_NAME_SIZE, np->name);
414 } else {
415 reg = of_get_property(np, "reg", NULL);
416 dev_set_name(&dev->ofdev.dev, "%1d.%08x:%.*s",
417 chip->lbus.index,
418 reg ? *reg : 0, MAX_NODE_NAME_SIZE, np->name);
419 }
420
421
422 macio_setup_interrupts(dev);
423 macio_setup_resources(dev, parent_res);
424 macio_add_missing_resources(dev);
425
426
427 if (of_device_register(&dev->ofdev) != 0) {
428 printk(KERN_DEBUG"macio: device registration error for %s!\n",
429 dev_name(&dev->ofdev.dev));
430 kfree(dev);
431 return NULL;
432 }
433
434 return dev;
435}
436
437static int macio_skip_device(struct device_node *np)
438{
439 if (strncmp(np->name, "battery", 7) == 0)
440 return 1;
441 if (strncmp(np->name, "escc-legacy", 11) == 0)
442 return 1;
443 return 0;
444}
445
446
447
448
449
450
451
452
453
454
455
456
457static void macio_pci_add_devices(struct macio_chip *chip)
458{
459 struct device_node *np, *pnode;
460 struct macio_dev *rdev, *mdev, *mbdev = NULL, *sdev = NULL;
461 struct device *parent = NULL;
462 struct resource *root_res = &iomem_resource;
463
464
465#ifdef CONFIG_PCI
466 if (chip->lbus.pdev) {
467 parent = &chip->lbus.pdev->dev;
468 root_res = &chip->lbus.pdev->resource[0];
469 }
470#endif
471 pnode = of_node_get(chip->of_node);
472 if (pnode == NULL)
473 return;
474
475
476 rdev = macio_add_one_device(chip, parent, pnode, NULL, root_res);
477 if (rdev == NULL)
478 return;
479 root_res = &rdev->resource[0];
480
481
482 for (np = NULL; (np = of_get_next_child(pnode, np)) != NULL;) {
483 if (macio_skip_device(np))
484 continue;
485 of_node_get(np);
486 mdev = macio_add_one_device(chip, &rdev->ofdev.dev, np, NULL,
487 root_res);
488 if (mdev == NULL)
489 of_node_put(np);
490 else if (strncmp(np->name, "media-bay", 9) == 0)
491 mbdev = mdev;
492 else if (strncmp(np->name, "escc", 4) == 0)
493 sdev = mdev;
494 }
495
496
497 if (mbdev) {
498 pnode = mbdev->ofdev.dev.of_node;
499 for (np = NULL; (np = of_get_next_child(pnode, np)) != NULL;) {
500 if (macio_skip_device(np))
501 continue;
502 of_node_get(np);
503 if (macio_add_one_device(chip, &mbdev->ofdev.dev, np,
504 mbdev, root_res) == NULL)
505 of_node_put(np);
506 }
507 }
508
509
510 if (sdev) {
511 pnode = sdev->ofdev.dev.of_node;
512 for (np = NULL; (np = of_get_next_child(pnode, np)) != NULL;) {
513 if (macio_skip_device(np))
514 continue;
515 of_node_get(np);
516 if (macio_add_one_device(chip, &sdev->ofdev.dev, np,
517 NULL, root_res) == NULL)
518 of_node_put(np);
519 }
520 }
521}
522
523
524
525
526
527
528int macio_register_driver(struct macio_driver *drv)
529{
530
531 drv->driver.bus = &macio_bus_type;
532
533
534 return driver_register(&drv->driver);
535}
536
537
538
539
540
541void macio_unregister_driver(struct macio_driver *drv)
542{
543 driver_unregister(&drv->driver);
544}
545
546
547struct macio_devres {
548 u32 res_mask;
549};
550
551static void maciom_release(struct device *gendev, void *res)
552{
553 struct macio_dev *dev = to_macio_device(gendev);
554 struct macio_devres *dr = res;
555 int i, max;
556
557 max = min(dev->n_resources, 32);
558 for (i = 0; i < max; i++) {
559 if (dr->res_mask & (1 << i))
560 macio_release_resource(dev, i);
561 }
562}
563
564int macio_enable_devres(struct macio_dev *dev)
565{
566 struct macio_devres *dr;
567
568 dr = devres_find(&dev->ofdev.dev, maciom_release, NULL, NULL);
569 if (!dr) {
570 dr = devres_alloc(maciom_release, sizeof(*dr), GFP_KERNEL);
571 if (!dr)
572 return -ENOMEM;
573 }
574 return devres_get(&dev->ofdev.dev, dr, NULL, NULL) != NULL;
575}
576
577static struct macio_devres * find_macio_dr(struct macio_dev *dev)
578{
579 return devres_find(&dev->ofdev.dev, maciom_release, NULL, NULL);
580}
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596int macio_request_resource(struct macio_dev *dev, int resource_no,
597 const char *name)
598{
599 struct macio_devres *dr = find_macio_dr(dev);
600
601 if (macio_resource_len(dev, resource_no) == 0)
602 return 0;
603
604 if (!request_mem_region(macio_resource_start(dev, resource_no),
605 macio_resource_len(dev, resource_no),
606 name))
607 goto err_out;
608
609 if (dr && resource_no < 32)
610 dr->res_mask |= 1 << resource_no;
611
612 return 0;
613
614err_out:
615 printk (KERN_WARNING "MacIO: Unable to reserve resource #%d:%lx@%lx"
616 " for device %s\n",
617 resource_no,
618 macio_resource_len(dev, resource_no),
619 macio_resource_start(dev, resource_no),
620 dev_name(&dev->ofdev.dev));
621 return -EBUSY;
622}
623
624
625
626
627
628
629void macio_release_resource(struct macio_dev *dev, int resource_no)
630{
631 struct macio_devres *dr = find_macio_dr(dev);
632
633 if (macio_resource_len(dev, resource_no) == 0)
634 return;
635 release_mem_region(macio_resource_start(dev, resource_no),
636 macio_resource_len(dev, resource_no));
637 if (dr && resource_no < 32)
638 dr->res_mask &= ~(1 << resource_no);
639}
640
641
642
643
644
645
646
647
648
649
650
651
652
653int macio_request_resources(struct macio_dev *dev, const char *name)
654{
655 int i;
656
657 for (i = 0; i < dev->n_resources; i++)
658 if (macio_request_resource(dev, i, name))
659 goto err_out;
660 return 0;
661
662err_out:
663 while(--i >= 0)
664 macio_release_resource(dev, i);
665
666 return -EBUSY;
667}
668
669
670
671
672
673
674void macio_release_resources(struct macio_dev *dev)
675{
676 int i;
677
678 for (i = 0; i < dev->n_resources; i++)
679 macio_release_resource(dev, i);
680}
681
682
683#ifdef CONFIG_PCI
684
685static int macio_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
686{
687 struct device_node* np;
688 struct macio_chip* chip;
689
690 if (ent->vendor != PCI_VENDOR_ID_APPLE)
691 return -ENODEV;
692
693
694
695
696 np = pci_device_to_OF_node(pdev);
697 if (np == NULL)
698 return -ENODEV;
699
700
701
702
703 of_node_get(np);
704
705
706
707
708 chip = macio_find(np, macio_unknown);
709 of_node_put(np);
710 if (chip == NULL)
711 return -ENODEV;
712
713
714 if (chip->lbus.pdev == NULL) {
715 chip->lbus.pdev = pdev;
716 chip->lbus.chip = chip;
717 pci_set_drvdata(pdev, &chip->lbus);
718 pci_set_master(pdev);
719 }
720
721 printk(KERN_INFO "MacIO PCI driver attached to %s chipset\n",
722 chip->name);
723
724
725
726
727
728
729
730 if (chip->type == macio_gatwick || chip->type == macio_ohareII)
731 if (macio_chips[0].lbus.pdev == NULL) {
732 macio_on_hold = chip;
733 return 0;
734 }
735
736 macio_pci_add_devices(chip);
737 if (macio_on_hold && macio_chips[0].lbus.pdev != NULL) {
738 macio_pci_add_devices(macio_on_hold);
739 macio_on_hold = NULL;
740 }
741
742 return 0;
743}
744
745static void macio_pci_remove(struct pci_dev* pdev)
746{
747 panic("removing of macio-asic not supported !\n");
748}
749
750
751
752
753
754static const struct pci_device_id pci_ids[] = { {
755 .vendor = PCI_VENDOR_ID_APPLE,
756 .device = PCI_ANY_ID,
757 .subvendor = PCI_ANY_ID,
758 .subdevice = PCI_ANY_ID,
759
760 }, { }
761};
762MODULE_DEVICE_TABLE (pci, pci_ids);
763
764
765static struct pci_driver macio_pci_driver = {
766 .name = (char *) "macio",
767 .id_table = pci_ids,
768
769 .probe = macio_pci_probe,
770 .remove = macio_pci_remove,
771};
772
773#endif
774
775static int __init macio_module_init (void)
776{
777#ifdef CONFIG_PCI
778 int rc;
779
780 rc = pci_register_driver(&macio_pci_driver);
781 if (rc)
782 return rc;
783#endif
784 return 0;
785}
786
787module_init(macio_module_init);
788
789EXPORT_SYMBOL(macio_register_driver);
790EXPORT_SYMBOL(macio_unregister_driver);
791EXPORT_SYMBOL(macio_dev_get);
792EXPORT_SYMBOL(macio_dev_put);
793EXPORT_SYMBOL(macio_request_resource);
794EXPORT_SYMBOL(macio_release_resource);
795EXPORT_SYMBOL(macio_request_resources);
796EXPORT_SYMBOL(macio_release_resources);
797EXPORT_SYMBOL(macio_enable_devres);
798
799