Loading...
1/*
2 * Bus & driver management routines for devices within
3 * a MacIO ASIC. Interface to new driver model mostly
4 * stolen from the PCI version.
5 *
6 * Copyright (C) 2005 Ben. Herrenschmidt (benh@kernel.crashing.org)
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * as published by the Free Software Foundation; either version
11 * 2 of the License, or (at your option) any later version.
12 *
13 * TODO:
14 *
15 * - Don't probe below media bay by default, but instead provide
16 * some hooks for media bay to dynamically add/remove it's own
17 * sub-devices.
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 struct device_attribute macio_dev_attrs[];
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_attrs = macio_dev_attrs,
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 * macio_release_dev - free a macio device structure when all users of it are
160 * finished.
161 * @dev: device that's been disconnected
162 *
163 * Will be called only by the device core when all users of this macio device
164 * are done. This currently means never as we don't hot remove any macio
165 * device yet, though that will happen with mediabay based devices in a later
166 * implementation.
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 * macio_resource_quirks - tweak or skip some resources for a device
178 * @np: pointer to the device node
179 * @res: resulting resource
180 * @index: index of resource in node
181 *
182 * If this routine returns non-null, then the resource is completely
183 * skipped.
184 */
185static int macio_resource_quirks(struct device_node *np, struct resource *res,
186 int index)
187{
188 /* Only quirks for memory resources for now */
189 if ((res->flags & IORESOURCE_MEM) == 0)
190 return 0;
191
192 /* Grand Central has too large resource 0 on some machines */
193 if (index == 0 && !strcmp(np->name, "gc"))
194 res->end = res->start + 0x1ffff;
195
196 /* Airport has bogus resource 2 */
197 if (index >= 2 && !strcmp(np->name, "radio"))
198 return 1;
199
200#ifndef CONFIG_PPC64
201 /* DBDMAs may have bogus sizes */
202 if ((res->start & 0x0001f000) == 0x00008000)
203 res->end = res->start + 0xff;
204#endif /* CONFIG_PPC64 */
205
206 /* ESCC parent eats child resources. We could have added a
207 * level of hierarchy, but I don't really feel the need
208 * for it
209 */
210 if (!strcmp(np->name, "escc"))
211 return 1;
212
213 /* ESCC has bogus resources >= 3 */
214 if (index >= 3 && !(strcmp(np->name, "ch-a") &&
215 strcmp(np->name, "ch-b")))
216 return 1;
217
218 /* Media bay has too many resources, keep only first one */
219 if (index > 0 && !strcmp(np->name, "media-bay"))
220 return 1;
221
222 /* Some older IDE resources have bogus sizes */
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 != NO_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 /* Gatwick has some missing interrupts on child nodes */
254 if (dev->bus->chip->type != macio_gatwick)
255 return;
256
257 /* irq_base is always 64 on gatwick. I have no cleaner way to get
258 * that value from here at this point
259 */
260 irq_base = 64;
261
262 /* Fix SCC */
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 /* Fix media-bay */
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 /* Fix left media bay childs */
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 == NO_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 /* Currently, we consider failure as harmless, this may
336 * change in the future, once I've found all the device
337 * tree bugs in older machines & worked around them
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 * macio_add_one_device - Add one device from OF node to the device tree
350 * @chip: pointer to the macio_chip holding the device
351 * @np: pointer to the device node in the OF tree
352 * @in_bay: set to 1 if device is part of a media-bay
353 *
354 * When media-bay is changed to hotswap drivers, this function will
355 * be exposed to the bay driver some way...
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.parent = parent;
379 dev->ofdev.dev.bus = &macio_bus_type;
380 dev->ofdev.dev.release = macio_release_dev;
381 dev->ofdev.dev.dma_parms = &dev->dma_parms;
382
383 /* Standard DMA paremeters */
384 dma_set_max_seg_size(&dev->ofdev.dev, 65536);
385 dma_set_seg_boundary(&dev->ofdev.dev, 0xffffffff);
386
387#ifdef CONFIG_PCI
388 /* Set the DMA ops to the ones from the PCI device, this could be
389 * fishy if we didn't know that on PowerMac it's always direct ops
390 * or iommu ops that will work fine
391 *
392 * To get all the fields, copy all archdata
393 */
394 dev->ofdev.dev.archdata = chip->lbus.pdev->dev.archdata;
395#endif /* CONFIG_PCI */
396
397#ifdef DEBUG
398 printk("preparing mdev @%p, ofdev @%p, dev @%p, kobj @%p\n",
399 dev, &dev->ofdev, &dev->ofdev.dev, &dev->ofdev.dev.kobj);
400#endif
401
402 /* MacIO itself has a different reg, we use it's PCI base */
403 if (np == chip->of_node) {
404 dev_set_name(&dev->ofdev.dev, "%1d.%08x:%.*s",
405 chip->lbus.index,
406#ifdef CONFIG_PCI
407 (unsigned int)pci_resource_start(chip->lbus.pdev, 0),
408#else
409 0, /* NuBus may want to do something better here */
410#endif
411 MAX_NODE_NAME_SIZE, np->name);
412 } else {
413 reg = of_get_property(np, "reg", NULL);
414 dev_set_name(&dev->ofdev.dev, "%1d.%08x:%.*s",
415 chip->lbus.index,
416 reg ? *reg : 0, MAX_NODE_NAME_SIZE, np->name);
417 }
418
419 /* Setup interrupts & resources */
420 macio_setup_interrupts(dev);
421 macio_setup_resources(dev, parent_res);
422 macio_add_missing_resources(dev);
423
424 /* Register with core */
425 if (of_device_register(&dev->ofdev) != 0) {
426 printk(KERN_DEBUG"macio: device registration error for %s!\n",
427 dev_name(&dev->ofdev.dev));
428 kfree(dev);
429 return NULL;
430 }
431
432 return dev;
433}
434
435static int macio_skip_device(struct device_node *np)
436{
437 if (strncmp(np->name, "battery", 7) == 0)
438 return 1;
439 if (strncmp(np->name, "escc-legacy", 11) == 0)
440 return 1;
441 return 0;
442}
443
444/**
445 * macio_pci_add_devices - Adds sub-devices of mac-io to the device tree
446 * @chip: pointer to the macio_chip holding the devices
447 *
448 * This function will do the job of extracting devices from the
449 * Open Firmware device tree, build macio_dev structures and add
450 * them to the Linux device tree.
451 *
452 * For now, childs of media-bay are added now as well. This will
453 * change rsn though.
454 */
455static void macio_pci_add_devices(struct macio_chip *chip)
456{
457 struct device_node *np, *pnode;
458 struct macio_dev *rdev, *mdev, *mbdev = NULL, *sdev = NULL;
459 struct device *parent = NULL;
460 struct resource *root_res = &iomem_resource;
461
462 /* Add a node for the macio bus itself */
463#ifdef CONFIG_PCI
464 if (chip->lbus.pdev) {
465 parent = &chip->lbus.pdev->dev;
466 root_res = &chip->lbus.pdev->resource[0];
467 }
468#endif
469 pnode = of_node_get(chip->of_node);
470 if (pnode == NULL)
471 return;
472
473 /* Add macio itself to hierarchy */
474 rdev = macio_add_one_device(chip, parent, pnode, NULL, root_res);
475 if (rdev == NULL)
476 return;
477 root_res = &rdev->resource[0];
478
479 /* First scan 1st level */
480 for (np = NULL; (np = of_get_next_child(pnode, np)) != NULL;) {
481 if (macio_skip_device(np))
482 continue;
483 of_node_get(np);
484 mdev = macio_add_one_device(chip, &rdev->ofdev.dev, np, NULL,
485 root_res);
486 if (mdev == NULL)
487 of_node_put(np);
488 else if (strncmp(np->name, "media-bay", 9) == 0)
489 mbdev = mdev;
490 else if (strncmp(np->name, "escc", 4) == 0)
491 sdev = mdev;
492 }
493
494 /* Add media bay devices if any */
495 if (mbdev) {
496 pnode = mbdev->ofdev.dev.of_node;
497 for (np = NULL; (np = of_get_next_child(pnode, np)) != NULL;) {
498 if (macio_skip_device(np))
499 continue;
500 of_node_get(np);
501 if (macio_add_one_device(chip, &mbdev->ofdev.dev, np,
502 mbdev, root_res) == NULL)
503 of_node_put(np);
504 }
505 }
506
507 /* Add serial ports if any */
508 if (sdev) {
509 pnode = sdev->ofdev.dev.of_node;
510 for (np = NULL; (np = of_get_next_child(pnode, np)) != NULL;) {
511 if (macio_skip_device(np))
512 continue;
513 of_node_get(np);
514 if (macio_add_one_device(chip, &sdev->ofdev.dev, np,
515 NULL, root_res) == NULL)
516 of_node_put(np);
517 }
518 }
519}
520
521
522/**
523 * macio_register_driver - Registers a new MacIO device driver
524 * @drv: pointer to the driver definition structure
525 */
526int macio_register_driver(struct macio_driver *drv)
527{
528 /* initialize common driver fields */
529 drv->driver.bus = &macio_bus_type;
530
531 /* register with core */
532 return driver_register(&drv->driver);
533}
534
535/**
536 * macio_unregister_driver - Unregisters a new MacIO device driver
537 * @drv: pointer to the driver definition structure
538 */
539void macio_unregister_driver(struct macio_driver *drv)
540{
541 driver_unregister(&drv->driver);
542}
543
544/* Managed MacIO resources */
545struct macio_devres {
546 u32 res_mask;
547};
548
549static void maciom_release(struct device *gendev, void *res)
550{
551 struct macio_dev *dev = to_macio_device(gendev);
552 struct macio_devres *dr = res;
553 int i, max;
554
555 max = min(dev->n_resources, 32);
556 for (i = 0; i < max; i++) {
557 if (dr->res_mask & (1 << i))
558 macio_release_resource(dev, i);
559 }
560}
561
562int macio_enable_devres(struct macio_dev *dev)
563{
564 struct macio_devres *dr;
565
566 dr = devres_find(&dev->ofdev.dev, maciom_release, NULL, NULL);
567 if (!dr) {
568 dr = devres_alloc(maciom_release, sizeof(*dr), GFP_KERNEL);
569 if (!dr)
570 return -ENOMEM;
571 }
572 return devres_get(&dev->ofdev.dev, dr, NULL, NULL) != NULL;
573}
574
575static struct macio_devres * find_macio_dr(struct macio_dev *dev)
576{
577 return devres_find(&dev->ofdev.dev, maciom_release, NULL, NULL);
578}
579
580/**
581 * macio_request_resource - Request an MMIO resource
582 * @dev: pointer to the device holding the resource
583 * @resource_no: resource number to request
584 * @name: resource name
585 *
586 * Mark memory region number @resource_no associated with MacIO
587 * device @dev as being reserved by owner @name. Do not access
588 * any address inside the memory regions unless this call returns
589 * successfully.
590 *
591 * Returns 0 on success, or %EBUSY on error. A warning
592 * message is also printed on failure.
593 */
594int macio_request_resource(struct macio_dev *dev, int resource_no,
595 const char *name)
596{
597 struct macio_devres *dr = find_macio_dr(dev);
598
599 if (macio_resource_len(dev, resource_no) == 0)
600 return 0;
601
602 if (!request_mem_region(macio_resource_start(dev, resource_no),
603 macio_resource_len(dev, resource_no),
604 name))
605 goto err_out;
606
607 if (dr && resource_no < 32)
608 dr->res_mask |= 1 << resource_no;
609
610 return 0;
611
612err_out:
613 printk (KERN_WARNING "MacIO: Unable to reserve resource #%d:%lx@%lx"
614 " for device %s\n",
615 resource_no,
616 macio_resource_len(dev, resource_no),
617 macio_resource_start(dev, resource_no),
618 dev_name(&dev->ofdev.dev));
619 return -EBUSY;
620}
621
622/**
623 * macio_release_resource - Release an MMIO resource
624 * @dev: pointer to the device holding the resource
625 * @resource_no: resource number to release
626 */
627void macio_release_resource(struct macio_dev *dev, int resource_no)
628{
629 struct macio_devres *dr = find_macio_dr(dev);
630
631 if (macio_resource_len(dev, resource_no) == 0)
632 return;
633 release_mem_region(macio_resource_start(dev, resource_no),
634 macio_resource_len(dev, resource_no));
635 if (dr && resource_no < 32)
636 dr->res_mask &= ~(1 << resource_no);
637}
638
639/**
640 * macio_request_resources - Reserve all memory resources
641 * @dev: MacIO device whose resources are to be reserved
642 * @name: Name to be associated with resource.
643 *
644 * Mark all memory regions associated with MacIO device @dev as
645 * being reserved by owner @name. Do not access any address inside
646 * the memory regions unless this call returns successfully.
647 *
648 * Returns 0 on success, or %EBUSY on error. A warning
649 * message is also printed on failure.
650 */
651int macio_request_resources(struct macio_dev *dev, const char *name)
652{
653 int i;
654
655 for (i = 0; i < dev->n_resources; i++)
656 if (macio_request_resource(dev, i, name))
657 goto err_out;
658 return 0;
659
660err_out:
661 while(--i >= 0)
662 macio_release_resource(dev, i);
663
664 return -EBUSY;
665}
666
667/**
668 * macio_release_resources - Release reserved memory resources
669 * @dev: MacIO device whose resources were previously reserved
670 */
671
672void macio_release_resources(struct macio_dev *dev)
673{
674 int i;
675
676 for (i = 0; i < dev->n_resources; i++)
677 macio_release_resource(dev, i);
678}
679
680
681#ifdef CONFIG_PCI
682
683static int macio_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
684{
685 struct device_node* np;
686 struct macio_chip* chip;
687
688 if (ent->vendor != PCI_VENDOR_ID_APPLE)
689 return -ENODEV;
690
691 /* Note regarding refcounting: We assume pci_device_to_OF_node() is
692 * ported to new OF APIs and returns a node with refcount incremented.
693 */
694 np = pci_device_to_OF_node(pdev);
695 if (np == NULL)
696 return -ENODEV;
697
698 /* The above assumption is wrong !!!
699 * fix that here for now until I fix the arch code
700 */
701 of_node_get(np);
702
703 /* We also assume that pmac_feature will have done a get() on nodes
704 * stored in the macio chips array
705 */
706 chip = macio_find(np, macio_unknown);
707 of_node_put(np);
708 if (chip == NULL)
709 return -ENODEV;
710
711 /* XXX Need locking ??? */
712 if (chip->lbus.pdev == NULL) {
713 chip->lbus.pdev = pdev;
714 chip->lbus.chip = chip;
715 pci_set_drvdata(pdev, &chip->lbus);
716 pci_set_master(pdev);
717 }
718
719 printk(KERN_INFO "MacIO PCI driver attached to %s chipset\n",
720 chip->name);
721
722 /*
723 * HACK ALERT: The WallStreet PowerBook and some OHare based machines
724 * have 2 macio ASICs. I must probe the "main" one first or IDE
725 * ordering will be incorrect. So I put on "hold" the second one since
726 * it seem to appear first on PCI
727 */
728 if (chip->type == macio_gatwick || chip->type == macio_ohareII)
729 if (macio_chips[0].lbus.pdev == NULL) {
730 macio_on_hold = chip;
731 return 0;
732 }
733
734 macio_pci_add_devices(chip);
735 if (macio_on_hold && macio_chips[0].lbus.pdev != NULL) {
736 macio_pci_add_devices(macio_on_hold);
737 macio_on_hold = NULL;
738 }
739
740 return 0;
741}
742
743static void macio_pci_remove(struct pci_dev* pdev)
744{
745 panic("removing of macio-asic not supported !\n");
746}
747
748/*
749 * MacIO is matched against any Apple ID, it's probe() function
750 * will then decide wether it applies or not
751 */
752static const struct pci_device_id pci_ids[] = { {
753 .vendor = PCI_VENDOR_ID_APPLE,
754 .device = PCI_ANY_ID,
755 .subvendor = PCI_ANY_ID,
756 .subdevice = PCI_ANY_ID,
757
758 }, { /* end: all zeroes */ }
759};
760MODULE_DEVICE_TABLE (pci, pci_ids);
761
762/* pci driver glue; this is a "new style" PCI driver module */
763static struct pci_driver macio_pci_driver = {
764 .name = (char *) "macio",
765 .id_table = pci_ids,
766
767 .probe = macio_pci_probe,
768 .remove = macio_pci_remove,
769};
770
771#endif /* CONFIG_PCI */
772
773static int __init macio_module_init (void)
774{
775#ifdef CONFIG_PCI
776 int rc;
777
778 rc = pci_register_driver(&macio_pci_driver);
779 if (rc)
780 return rc;
781#endif /* CONFIG_PCI */
782 return 0;
783}
784
785module_init(macio_module_init);
786
787EXPORT_SYMBOL(macio_register_driver);
788EXPORT_SYMBOL(macio_unregister_driver);
789EXPORT_SYMBOL(macio_dev_get);
790EXPORT_SYMBOL(macio_dev_put);
791EXPORT_SYMBOL(macio_request_resource);
792EXPORT_SYMBOL(macio_release_resource);
793EXPORT_SYMBOL(macio_request_resources);
794EXPORT_SYMBOL(macio_release_resources);
795EXPORT_SYMBOL(macio_enable_devres);
796
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Bus & driver management routines for devices within
4 * a MacIO ASIC. Interface to new driver model mostly
5 * stolen from the PCI version.
6 *
7 * Copyright (C) 2005 Ben. Herrenschmidt (benh@kernel.crashing.org)
8 *
9 * TODO:
10 *
11 * - Don't probe below media bay by default, but instead provide
12 * some hooks for media bay to dynamically add/remove it's own
13 * sub-devices.
14 */
15
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.h>
24#include <linux/of_address.h>
25#include <linux/of_device.h>
26#include <linux/of_irq.h>
27
28#include <asm/machdep.h>
29#include <asm/macio.h>
30#include <asm/pmac_feature.h>
31
32#undef DEBUG
33
34#define MAX_NODE_NAME_SIZE (20 - 12)
35
36static struct macio_chip *macio_on_hold;
37
38static int macio_bus_match(struct device *dev, struct device_driver *drv)
39{
40 const struct of_device_id * matches = drv->of_match_table;
41
42 if (!matches)
43 return 0;
44
45 return of_match_device(matches, dev) != NULL;
46}
47
48struct macio_dev *macio_dev_get(struct macio_dev *dev)
49{
50 struct device *tmp;
51
52 if (!dev)
53 return NULL;
54 tmp = get_device(&dev->ofdev.dev);
55 if (tmp)
56 return to_macio_device(tmp);
57 else
58 return NULL;
59}
60
61void macio_dev_put(struct macio_dev *dev)
62{
63 if (dev)
64 put_device(&dev->ofdev.dev);
65}
66
67
68static int macio_device_probe(struct device *dev)
69{
70 int error = -ENODEV;
71 struct macio_driver *drv;
72 struct macio_dev *macio_dev;
73 const struct of_device_id *match;
74
75 drv = to_macio_driver(dev->driver);
76 macio_dev = to_macio_device(dev);
77
78 if (!drv->probe)
79 return error;
80
81 macio_dev_get(macio_dev);
82
83 match = of_match_device(drv->driver.of_match_table, dev);
84 if (match)
85 error = drv->probe(macio_dev, match);
86 if (error)
87 macio_dev_put(macio_dev);
88
89 return error;
90}
91
92static void macio_device_remove(struct device *dev)
93{
94 struct macio_dev * macio_dev = to_macio_device(dev);
95 struct macio_driver * drv = to_macio_driver(dev->driver);
96
97 if (dev->driver && drv->remove)
98 drv->remove(macio_dev);
99 macio_dev_put(macio_dev);
100}
101
102static void macio_device_shutdown(struct device *dev)
103{
104 struct macio_dev * macio_dev = to_macio_device(dev);
105 struct macio_driver * drv = to_macio_driver(dev->driver);
106
107 if (dev->driver && drv->shutdown)
108 drv->shutdown(macio_dev);
109}
110
111static int macio_device_suspend(struct device *dev, pm_message_t state)
112{
113 struct macio_dev * macio_dev = to_macio_device(dev);
114 struct macio_driver * drv = to_macio_driver(dev->driver);
115
116 if (dev->driver && drv->suspend)
117 return drv->suspend(macio_dev, state);
118 return 0;
119}
120
121static int macio_device_resume(struct device * dev)
122{
123 struct macio_dev * macio_dev = to_macio_device(dev);
124 struct macio_driver * drv = to_macio_driver(dev->driver);
125
126 if (dev->driver && drv->resume)
127 return drv->resume(macio_dev);
128 return 0;
129}
130
131extern const struct attribute_group *macio_dev_groups[];
132
133struct bus_type macio_bus_type = {
134 .name = "macio",
135 .match = macio_bus_match,
136 .uevent = of_device_uevent_modalias,
137 .probe = macio_device_probe,
138 .remove = macio_device_remove,
139 .shutdown = macio_device_shutdown,
140 .suspend = macio_device_suspend,
141 .resume = macio_device_resume,
142 .dev_groups = macio_dev_groups,
143};
144
145static int __init macio_bus_driver_init(void)
146{
147 return bus_register(&macio_bus_type);
148}
149
150postcore_initcall(macio_bus_driver_init);
151
152
153/**
154 * macio_release_dev - free a macio device structure when all users of it are
155 * finished.
156 * @dev: device that's been disconnected
157 *
158 * Will be called only by the device core when all users of this macio device
159 * are done. This currently means never as we don't hot remove any macio
160 * device yet, though that will happen with mediabay based devices in a later
161 * implementation.
162 */
163static void macio_release_dev(struct device *dev)
164{
165 struct macio_dev *mdev;
166
167 mdev = to_macio_device(dev);
168 kfree(mdev);
169}
170
171/**
172 * macio_resource_quirks - tweak or skip some resources for a device
173 * @np: pointer to the device node
174 * @res: resulting resource
175 * @index: index of resource in node
176 *
177 * If this routine returns non-null, then the resource is completely
178 * skipped.
179 */
180static int macio_resource_quirks(struct device_node *np, struct resource *res,
181 int index)
182{
183 /* Only quirks for memory resources for now */
184 if ((res->flags & IORESOURCE_MEM) == 0)
185 return 0;
186
187 /* Grand Central has too large resource 0 on some machines */
188 if (index == 0 && of_node_name_eq(np, "gc"))
189 res->end = res->start + 0x1ffff;
190
191 /* Airport has bogus resource 2 */
192 if (index >= 2 && of_node_name_eq(np, "radio"))
193 return 1;
194
195#ifndef CONFIG_PPC64
196 /* DBDMAs may have bogus sizes */
197 if ((res->start & 0x0001f000) == 0x00008000)
198 res->end = res->start + 0xff;
199#endif /* CONFIG_PPC64 */
200
201 /* ESCC parent eats child resources. We could have added a
202 * level of hierarchy, but I don't really feel the need
203 * for it
204 */
205 if (of_node_name_eq(np, "escc"))
206 return 1;
207
208 /* ESCC has bogus resources >= 3 */
209 if (index >= 3 && (of_node_name_eq(np, "ch-a") ||
210 of_node_name_eq(np, "ch-b")))
211 return 1;
212
213 /* Media bay has too many resources, keep only first one */
214 if (index > 0 && of_node_name_eq(np, "media-bay"))
215 return 1;
216
217 /* Some older IDE resources have bogus sizes */
218 if (of_node_name_eq(np, "IDE") || of_node_name_eq(np, "ATA") ||
219 of_node_is_type(np, "ide") || of_node_is_type(np, "ata")) {
220 if (index == 0 && (res->end - res->start) > 0xfff)
221 res->end = res->start + 0xfff;
222 if (index == 1 && (res->end - res->start) > 0xff)
223 res->end = res->start + 0xff;
224 }
225 return 0;
226}
227
228static void macio_create_fixup_irq(struct macio_dev *dev, int index,
229 unsigned int line)
230{
231 unsigned int irq;
232
233 irq = irq_create_mapping(NULL, line);
234 if (!irq) {
235 dev->interrupt[index].start = irq;
236 dev->interrupt[index].flags = IORESOURCE_IRQ;
237 dev->interrupt[index].name = dev_name(&dev->ofdev.dev);
238 }
239 if (dev->n_interrupts <= index)
240 dev->n_interrupts = index + 1;
241}
242
243static void macio_add_missing_resources(struct macio_dev *dev)
244{
245 struct device_node *np = dev->ofdev.dev.of_node;
246 unsigned int irq_base;
247
248 /* Gatwick has some missing interrupts on child nodes */
249 if (dev->bus->chip->type != macio_gatwick)
250 return;
251
252 /* irq_base is always 64 on gatwick. I have no cleaner way to get
253 * that value from here at this point
254 */
255 irq_base = 64;
256
257 /* Fix SCC */
258 if (of_node_name_eq(np, "ch-a")) {
259 macio_create_fixup_irq(dev, 0, 15 + irq_base);
260 macio_create_fixup_irq(dev, 1, 4 + irq_base);
261 macio_create_fixup_irq(dev, 2, 5 + irq_base);
262 printk(KERN_INFO "macio: fixed SCC irqs on gatwick\n");
263 }
264
265 /* Fix media-bay */
266 if (of_node_name_eq(np, "media-bay")) {
267 macio_create_fixup_irq(dev, 0, 29 + irq_base);
268 printk(KERN_INFO "macio: fixed media-bay irq on gatwick\n");
269 }
270
271 /* Fix left media bay childs */
272 if (dev->media_bay != NULL && of_node_name_eq(np, "floppy")) {
273 macio_create_fixup_irq(dev, 0, 19 + irq_base);
274 macio_create_fixup_irq(dev, 1, 1 + irq_base);
275 printk(KERN_INFO "macio: fixed left floppy irqs\n");
276 }
277 if (dev->media_bay != NULL && of_node_name_eq(np, "ata4")) {
278 macio_create_fixup_irq(dev, 0, 14 + irq_base);
279 macio_create_fixup_irq(dev, 0, 3 + irq_base);
280 printk(KERN_INFO "macio: fixed left ide irqs\n");
281 }
282}
283
284static void macio_setup_interrupts(struct macio_dev *dev)
285{
286 struct device_node *np = dev->ofdev.dev.of_node;
287 unsigned int irq;
288 int i = 0, j = 0;
289
290 for (;;) {
291 struct resource *res;
292
293 if (j >= MACIO_DEV_COUNT_IRQS)
294 break;
295 res = &dev->interrupt[j];
296 irq = irq_of_parse_and_map(np, i++);
297 if (!irq)
298 break;
299 res->start = irq;
300 res->flags = IORESOURCE_IRQ;
301 res->name = dev_name(&dev->ofdev.dev);
302 if (macio_resource_quirks(np, res, i - 1)) {
303 memset(res, 0, sizeof(struct resource));
304 continue;
305 } else
306 j++;
307 }
308 dev->n_interrupts = j;
309}
310
311static void macio_setup_resources(struct macio_dev *dev,
312 struct resource *parent_res)
313{
314 struct device_node *np = dev->ofdev.dev.of_node;
315 struct resource r;
316 int index;
317
318 for (index = 0; of_address_to_resource(np, index, &r) == 0; index++) {
319 struct resource *res;
320 if (index >= MACIO_DEV_COUNT_RESOURCES)
321 break;
322 res = &dev->resource[index];
323 *res = r;
324 res->name = dev_name(&dev->ofdev.dev);
325
326 if (macio_resource_quirks(np, res, index)) {
327 memset(res, 0, sizeof(struct resource));
328 continue;
329 }
330 /* Currently, we consider failure as harmless, this may
331 * change in the future, once I've found all the device
332 * tree bugs in older machines & worked around them
333 */
334 if (insert_resource(parent_res, res)) {
335 printk(KERN_WARNING "Can't request resource "
336 "%d for MacIO device %s\n",
337 index, dev_name(&dev->ofdev.dev));
338 }
339 }
340 dev->n_resources = index;
341}
342
343/**
344 * macio_add_one_device - Add one device from OF node to the device tree
345 * @chip: pointer to the macio_chip holding the device
346 * @np: pointer to the device node in the OF tree
347 * @in_bay: set to 1 if device is part of a media-bay
348 *
349 * When media-bay is changed to hotswap drivers, this function will
350 * be exposed to the bay driver some way...
351 */
352static struct macio_dev * macio_add_one_device(struct macio_chip *chip,
353 struct device *parent,
354 struct device_node *np,
355 struct macio_dev *in_bay,
356 struct resource *parent_res)
357{
358 char name[MAX_NODE_NAME_SIZE + 1];
359 struct macio_dev *dev;
360 const u32 *reg;
361
362 if (np == NULL)
363 return NULL;
364
365 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
366 if (!dev)
367 return NULL;
368
369 dev->bus = &chip->lbus;
370 dev->media_bay = in_bay;
371 dev->ofdev.dev.of_node = np;
372 dev->ofdev.archdata.dma_mask = 0xffffffffUL;
373 dev->ofdev.dev.dma_mask = &dev->ofdev.archdata.dma_mask;
374 dev->ofdev.dev.coherent_dma_mask = dev->ofdev.archdata.dma_mask;
375 dev->ofdev.dev.parent = parent;
376 dev->ofdev.dev.bus = &macio_bus_type;
377 dev->ofdev.dev.release = macio_release_dev;
378 dev->ofdev.dev.dma_parms = &dev->dma_parms;
379
380 /* Standard DMA paremeters */
381 dma_set_max_seg_size(&dev->ofdev.dev, 65536);
382 dma_set_seg_boundary(&dev->ofdev.dev, 0xffffffff);
383
384#if defined(CONFIG_PCI) && defined(CONFIG_DMA_OPS)
385 /* Set the DMA ops to the ones from the PCI device, this could be
386 * fishy if we didn't know that on PowerMac it's always direct ops
387 * or iommu ops that will work fine
388 *
389 * To get all the fields, copy all archdata
390 */
391 dev->ofdev.dev.archdata = chip->lbus.pdev->dev.archdata;
392 dev->ofdev.dev.dma_ops = chip->lbus.pdev->dev.dma_ops;
393#endif /* CONFIG_PCI && CONFIG_DMA_OPS */
394
395#ifdef DEBUG
396 printk("preparing mdev @%p, ofdev @%p, dev @%p, kobj @%p\n",
397 dev, &dev->ofdev, &dev->ofdev.dev, &dev->ofdev.dev.kobj);
398#endif
399
400 /* MacIO itself has a different reg, we use it's PCI base */
401 snprintf(name, sizeof(name), "%pOFn", np);
402 if (np == chip->of_node) {
403 dev_set_name(&dev->ofdev.dev, "%1d.%08x:%.*s",
404 chip->lbus.index,
405#ifdef CONFIG_PCI
406 (unsigned int)pci_resource_start(chip->lbus.pdev, 0),
407#else
408 0, /* NuBus may want to do something better here */
409#endif
410 MAX_NODE_NAME_SIZE, name);
411 } else {
412 reg = of_get_property(np, "reg", NULL);
413 dev_set_name(&dev->ofdev.dev, "%1d.%08x:%.*s",
414 chip->lbus.index,
415 reg ? *reg : 0, MAX_NODE_NAME_SIZE, name);
416 }
417
418 /* Setup interrupts & resources */
419 macio_setup_interrupts(dev);
420 macio_setup_resources(dev, parent_res);
421 macio_add_missing_resources(dev);
422
423 /* Register with core */
424 if (of_device_register(&dev->ofdev) != 0) {
425 printk(KERN_DEBUG"macio: device registration error for %s!\n",
426 dev_name(&dev->ofdev.dev));
427 put_device(&dev->ofdev.dev);
428 return NULL;
429 }
430
431 return dev;
432}
433
434static int macio_skip_device(struct device_node *np)
435{
436 return of_node_name_prefix(np, "battery") ||
437 of_node_name_prefix(np, "escc-legacy");
438}
439
440/**
441 * macio_pci_add_devices - Adds sub-devices of mac-io to the device tree
442 * @chip: pointer to the macio_chip holding the devices
443 *
444 * This function will do the job of extracting devices from the
445 * Open Firmware device tree, build macio_dev structures and add
446 * them to the Linux device tree.
447 *
448 * For now, childs of media-bay are added now as well. This will
449 * change rsn though.
450 */
451static void macio_pci_add_devices(struct macio_chip *chip)
452{
453 struct device_node *np, *pnode;
454 struct macio_dev *rdev, *mdev, *mbdev = NULL, *sdev = NULL;
455 struct device *parent = NULL;
456 struct resource *root_res = &iomem_resource;
457
458 /* Add a node for the macio bus itself */
459#ifdef CONFIG_PCI
460 if (chip->lbus.pdev) {
461 parent = &chip->lbus.pdev->dev;
462 root_res = &chip->lbus.pdev->resource[0];
463 }
464#endif
465 pnode = of_node_get(chip->of_node);
466 if (pnode == NULL)
467 return;
468
469 /* Add macio itself to hierarchy */
470 rdev = macio_add_one_device(chip, parent, pnode, NULL, root_res);
471 if (rdev == NULL)
472 return;
473 root_res = &rdev->resource[0];
474
475 /* First scan 1st level */
476 for_each_child_of_node(pnode, np) {
477 if (macio_skip_device(np))
478 continue;
479 of_node_get(np);
480 mdev = macio_add_one_device(chip, &rdev->ofdev.dev, np, NULL,
481 root_res);
482 if (mdev == NULL)
483 of_node_put(np);
484 else if (of_node_name_prefix(np, "media-bay"))
485 mbdev = mdev;
486 else if (of_node_name_prefix(np, "escc"))
487 sdev = mdev;
488 }
489
490 /* Add media bay devices if any */
491 if (mbdev) {
492 pnode = mbdev->ofdev.dev.of_node;
493 for_each_child_of_node(pnode, np) {
494 if (macio_skip_device(np))
495 continue;
496 of_node_get(np);
497 if (macio_add_one_device(chip, &mbdev->ofdev.dev, np,
498 mbdev, root_res) == NULL)
499 of_node_put(np);
500 }
501 }
502
503 /* Add serial ports if any */
504 if (sdev) {
505 pnode = sdev->ofdev.dev.of_node;
506 for_each_child_of_node(pnode, np) {
507 if (macio_skip_device(np))
508 continue;
509 of_node_get(np);
510 if (macio_add_one_device(chip, &sdev->ofdev.dev, np,
511 NULL, root_res) == NULL)
512 of_node_put(np);
513 }
514 }
515}
516
517
518/**
519 * macio_register_driver - Registers a new MacIO device driver
520 * @drv: pointer to the driver definition structure
521 */
522int macio_register_driver(struct macio_driver *drv)
523{
524 /* initialize common driver fields */
525 drv->driver.bus = &macio_bus_type;
526
527 /* register with core */
528 return driver_register(&drv->driver);
529}
530
531/**
532 * macio_unregister_driver - Unregisters a new MacIO device driver
533 * @drv: pointer to the driver definition structure
534 */
535void macio_unregister_driver(struct macio_driver *drv)
536{
537 driver_unregister(&drv->driver);
538}
539
540/* Managed MacIO resources */
541struct macio_devres {
542 u32 res_mask;
543};
544
545static void maciom_release(struct device *gendev, void *res)
546{
547 struct macio_dev *dev = to_macio_device(gendev);
548 struct macio_devres *dr = res;
549 int i, max;
550
551 max = min(dev->n_resources, 32);
552 for (i = 0; i < max; i++) {
553 if (dr->res_mask & (1 << i))
554 macio_release_resource(dev, i);
555 }
556}
557
558int macio_enable_devres(struct macio_dev *dev)
559{
560 struct macio_devres *dr;
561
562 dr = devres_find(&dev->ofdev.dev, maciom_release, NULL, NULL);
563 if (!dr) {
564 dr = devres_alloc(maciom_release, sizeof(*dr), GFP_KERNEL);
565 if (!dr)
566 return -ENOMEM;
567 }
568 return devres_get(&dev->ofdev.dev, dr, NULL, NULL) != NULL;
569}
570
571static struct macio_devres * find_macio_dr(struct macio_dev *dev)
572{
573 return devres_find(&dev->ofdev.dev, maciom_release, NULL, NULL);
574}
575
576/**
577 * macio_request_resource - Request an MMIO resource
578 * @dev: pointer to the device holding the resource
579 * @resource_no: resource number to request
580 * @name: resource name
581 *
582 * Mark memory region number @resource_no associated with MacIO
583 * device @dev as being reserved by owner @name. Do not access
584 * any address inside the memory regions unless this call returns
585 * successfully.
586 *
587 * Returns 0 on success, or %EBUSY on error. A warning
588 * message is also printed on failure.
589 */
590int macio_request_resource(struct macio_dev *dev, int resource_no,
591 const char *name)
592{
593 struct macio_devres *dr = find_macio_dr(dev);
594
595 if (macio_resource_len(dev, resource_no) == 0)
596 return 0;
597
598 if (!request_mem_region(macio_resource_start(dev, resource_no),
599 macio_resource_len(dev, resource_no),
600 name))
601 goto err_out;
602
603 if (dr && resource_no < 32)
604 dr->res_mask |= 1 << resource_no;
605
606 return 0;
607
608err_out:
609 printk (KERN_WARNING "MacIO: Unable to reserve resource #%d:%lx@%lx"
610 " for device %s\n",
611 resource_no,
612 macio_resource_len(dev, resource_no),
613 macio_resource_start(dev, resource_no),
614 dev_name(&dev->ofdev.dev));
615 return -EBUSY;
616}
617
618/**
619 * macio_release_resource - Release an MMIO resource
620 * @dev: pointer to the device holding the resource
621 * @resource_no: resource number to release
622 */
623void macio_release_resource(struct macio_dev *dev, int resource_no)
624{
625 struct macio_devres *dr = find_macio_dr(dev);
626
627 if (macio_resource_len(dev, resource_no) == 0)
628 return;
629 release_mem_region(macio_resource_start(dev, resource_no),
630 macio_resource_len(dev, resource_no));
631 if (dr && resource_no < 32)
632 dr->res_mask &= ~(1 << resource_no);
633}
634
635/**
636 * macio_request_resources - Reserve all memory resources
637 * @dev: MacIO device whose resources are to be reserved
638 * @name: Name to be associated with resource.
639 *
640 * Mark all memory regions associated with MacIO device @dev as
641 * being reserved by owner @name. Do not access any address inside
642 * the memory regions unless this call returns successfully.
643 *
644 * Returns 0 on success, or %EBUSY on error. A warning
645 * message is also printed on failure.
646 */
647int macio_request_resources(struct macio_dev *dev, const char *name)
648{
649 int i;
650
651 for (i = 0; i < dev->n_resources; i++)
652 if (macio_request_resource(dev, i, name))
653 goto err_out;
654 return 0;
655
656err_out:
657 while(--i >= 0)
658 macio_release_resource(dev, i);
659
660 return -EBUSY;
661}
662
663/**
664 * macio_release_resources - Release reserved memory resources
665 * @dev: MacIO device whose resources were previously reserved
666 */
667
668void macio_release_resources(struct macio_dev *dev)
669{
670 int i;
671
672 for (i = 0; i < dev->n_resources; i++)
673 macio_release_resource(dev, i);
674}
675
676
677#ifdef CONFIG_PCI
678
679static int macio_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
680{
681 struct device_node* np;
682 struct macio_chip* chip;
683
684 if (ent->vendor != PCI_VENDOR_ID_APPLE)
685 return -ENODEV;
686
687 /* Note regarding refcounting: We assume pci_device_to_OF_node() is
688 * ported to new OF APIs and returns a node with refcount incremented.
689 */
690 np = pci_device_to_OF_node(pdev);
691 if (np == NULL)
692 return -ENODEV;
693
694 /* The above assumption is wrong !!!
695 * fix that here for now until I fix the arch code
696 */
697 of_node_get(np);
698
699 /* We also assume that pmac_feature will have done a get() on nodes
700 * stored in the macio chips array
701 */
702 chip = macio_find(np, macio_unknown);
703 of_node_put(np);
704 if (chip == NULL)
705 return -ENODEV;
706
707 /* XXX Need locking ??? */
708 if (chip->lbus.pdev == NULL) {
709 chip->lbus.pdev = pdev;
710 chip->lbus.chip = chip;
711 pci_set_drvdata(pdev, &chip->lbus);
712 pci_set_master(pdev);
713 }
714
715 printk(KERN_INFO "MacIO PCI driver attached to %s chipset\n",
716 chip->name);
717
718 /*
719 * HACK ALERT: The WallStreet PowerBook and some OHare based machines
720 * have 2 macio ASICs. I must probe the "main" one first or IDE
721 * ordering will be incorrect. So I put on "hold" the second one since
722 * it seem to appear first on PCI
723 */
724 if (chip->type == macio_gatwick || chip->type == macio_ohareII)
725 if (macio_chips[0].lbus.pdev == NULL) {
726 macio_on_hold = chip;
727 return 0;
728 }
729
730 macio_pci_add_devices(chip);
731 if (macio_on_hold && macio_chips[0].lbus.pdev != NULL) {
732 macio_pci_add_devices(macio_on_hold);
733 macio_on_hold = NULL;
734 }
735
736 return 0;
737}
738
739static void macio_pci_remove(struct pci_dev* pdev)
740{
741 panic("removing of macio-asic not supported !\n");
742}
743
744/*
745 * MacIO is matched against any Apple ID, it's probe() function
746 * will then decide wether it applies or not
747 */
748static const struct pci_device_id pci_ids[] = { {
749 .vendor = PCI_VENDOR_ID_APPLE,
750 .device = PCI_ANY_ID,
751 .subvendor = PCI_ANY_ID,
752 .subdevice = PCI_ANY_ID,
753
754 }, { /* end: all zeroes */ }
755};
756MODULE_DEVICE_TABLE (pci, pci_ids);
757
758/* pci driver glue; this is a "new style" PCI driver module */
759static struct pci_driver macio_pci_driver = {
760 .name = "macio",
761 .id_table = pci_ids,
762
763 .probe = macio_pci_probe,
764 .remove = macio_pci_remove,
765};
766
767#endif /* CONFIG_PCI */
768
769static int __init macio_module_init (void)
770{
771#ifdef CONFIG_PCI
772 int rc;
773
774 rc = pci_register_driver(&macio_pci_driver);
775 if (rc)
776 return rc;
777#endif /* CONFIG_PCI */
778 return 0;
779}
780
781module_init(macio_module_init);
782
783EXPORT_SYMBOL(macio_register_driver);
784EXPORT_SYMBOL(macio_unregister_driver);
785EXPORT_SYMBOL(macio_dev_get);
786EXPORT_SYMBOL(macio_dev_put);
787EXPORT_SYMBOL(macio_request_resource);
788EXPORT_SYMBOL(macio_release_resource);
789EXPORT_SYMBOL(macio_request_resources);
790EXPORT_SYMBOL(macio_release_resources);
791EXPORT_SYMBOL(macio_enable_devres);
792