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