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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.h>
24#include <linux/of_address.h>
25#include <linux/of_device.h>
26#include <linux/of_platform.h>
27#include <linux/of_irq.h>
28
29#include <asm/machdep.h>
30#include <asm/macio.h>
31#include <asm/pmac_feature.h>
32
33#undef DEBUG
34
35#define MAX_NODE_NAME_SIZE (20 - 12)
36
37static struct macio_chip *macio_on_hold;
38
39static int macio_bus_match(struct device *dev, const struct device_driver *drv)
40{
41 const struct of_device_id * matches = drv->of_match_table;
42
43 if (!matches)
44 return 0;
45
46 return of_match_device(matches, dev) != NULL;
47}
48
49struct macio_dev *macio_dev_get(struct macio_dev *dev)
50{
51 struct device *tmp;
52
53 if (!dev)
54 return NULL;
55 tmp = get_device(&dev->ofdev.dev);
56 if (tmp)
57 return to_macio_device(tmp);
58 else
59 return NULL;
60}
61
62void macio_dev_put(struct macio_dev *dev)
63{
64 if (dev)
65 put_device(&dev->ofdev.dev);
66}
67
68
69static int macio_device_probe(struct device *dev)
70{
71 int error = -ENODEV;
72 struct macio_driver *drv;
73 struct macio_dev *macio_dev;
74 const struct of_device_id *match;
75
76 drv = to_macio_driver(dev->driver);
77 macio_dev = to_macio_device(dev);
78
79 if (!drv->probe)
80 return error;
81
82 macio_dev_get(macio_dev);
83
84 match = of_match_device(drv->driver.of_match_table, dev);
85 if (match)
86 error = drv->probe(macio_dev, match);
87 if (error)
88 macio_dev_put(macio_dev);
89
90 return error;
91}
92
93static void macio_device_remove(struct device *dev)
94{
95 struct macio_dev * macio_dev = to_macio_device(dev);
96 struct macio_driver * drv = to_macio_driver(dev->driver);
97
98 if (dev->driver && drv->remove)
99 drv->remove(macio_dev);
100 macio_dev_put(macio_dev);
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
132static int macio_device_modalias(const struct device *dev, struct kobj_uevent_env *env)
133{
134 return of_device_uevent_modalias(dev, env);
135}
136
137extern const struct attribute_group *macio_dev_groups[];
138
139const struct bus_type macio_bus_type = {
140 .name = "macio",
141 .match = macio_bus_match,
142 .uevent = macio_device_modalias,
143 .probe = macio_device_probe,
144 .remove = macio_device_remove,
145 .shutdown = macio_device_shutdown,
146 .suspend = macio_device_suspend,
147 .resume = macio_device_resume,
148 .dev_groups = macio_dev_groups,
149};
150
151static int __init macio_bus_driver_init(void)
152{
153 return bus_register(&macio_bus_type);
154}
155
156postcore_initcall(macio_bus_driver_init);
157
158
159/**
160 * macio_release_dev - free a macio device structure when all users of it are
161 * finished.
162 * @dev: device that's been disconnected
163 *
164 * Will be called only by the device core when all users of this macio device
165 * are done. This currently means never as we don't hot remove any macio
166 * device yet, though that will happen with mediabay based devices in a later
167 * implementation.
168 */
169static void macio_release_dev(struct device *dev)
170{
171 struct macio_dev *mdev;
172
173 mdev = to_macio_device(dev);
174 kfree(mdev);
175}
176
177/**
178 * macio_resource_quirks - tweak or skip some resources for a device
179 * @np: pointer to the device node
180 * @res: resulting resource
181 * @index: index of resource in node
182 *
183 * If this routine returns non-null, then the resource is completely
184 * skipped.
185 */
186static int macio_resource_quirks(struct device_node *np, struct resource *res,
187 int index)
188{
189 /* Only quirks for memory resources for now */
190 if ((res->flags & IORESOURCE_MEM) == 0)
191 return 0;
192
193 /* Grand Central has too large resource 0 on some machines */
194 if (index == 0 && of_node_name_eq(np, "gc"))
195 res->end = res->start + 0x1ffff;
196
197 /* Airport has bogus resource 2 */
198 if (index >= 2 && of_node_name_eq(np, "radio"))
199 return 1;
200
201#ifndef CONFIG_PPC64
202 /* DBDMAs may have bogus sizes */
203 if ((res->start & 0x0001f000) == 0x00008000)
204 res->end = res->start + 0xff;
205#endif /* CONFIG_PPC64 */
206
207 /* ESCC parent eats child resources. We could have added a
208 * level of hierarchy, but I don't really feel the need
209 * for it
210 */
211 if (of_node_name_eq(np, "escc"))
212 return 1;
213
214 /* ESCC has bogus resources >= 3 */
215 if (index >= 3 && (of_node_name_eq(np, "ch-a") ||
216 of_node_name_eq(np, "ch-b")))
217 return 1;
218
219 /* Media bay has too many resources, keep only first one */
220 if (index > 0 && of_node_name_eq(np, "media-bay"))
221 return 1;
222
223 /* Some older IDE resources have bogus sizes */
224 if (of_node_name_eq(np, "IDE") || of_node_name_eq(np, "ATA") ||
225 of_node_is_type(np, "ide") || of_node_is_type(np, "ata")) {
226 if (index == 0 && (res->end - res->start) > 0xfff)
227 res->end = res->start + 0xfff;
228 if (index == 1 && (res->end - res->start) > 0xff)
229 res->end = res->start + 0xff;
230 }
231 return 0;
232}
233
234static void macio_create_fixup_irq(struct macio_dev *dev, int index,
235 unsigned int line)
236{
237 unsigned int irq;
238
239 irq = irq_create_mapping(NULL, line);
240 if (!irq) {
241 dev->interrupt[index].start = irq;
242 dev->interrupt[index].flags = IORESOURCE_IRQ;
243 dev->interrupt[index].name = dev_name(&dev->ofdev.dev);
244 }
245 if (dev->n_interrupts <= index)
246 dev->n_interrupts = index + 1;
247}
248
249static void macio_add_missing_resources(struct macio_dev *dev)
250{
251 struct device_node *np = dev->ofdev.dev.of_node;
252 unsigned int irq_base;
253
254 /* Gatwick has some missing interrupts on child nodes */
255 if (dev->bus->chip->type != macio_gatwick)
256 return;
257
258 /* irq_base is always 64 on gatwick. I have no cleaner way to get
259 * that value from here at this point
260 */
261 irq_base = 64;
262
263 /* Fix SCC */
264 if (of_node_name_eq(np, "ch-a")) {
265 macio_create_fixup_irq(dev, 0, 15 + irq_base);
266 macio_create_fixup_irq(dev, 1, 4 + irq_base);
267 macio_create_fixup_irq(dev, 2, 5 + irq_base);
268 printk(KERN_INFO "macio: fixed SCC irqs on gatwick\n");
269 }
270
271 /* Fix media-bay */
272 if (of_node_name_eq(np, "media-bay")) {
273 macio_create_fixup_irq(dev, 0, 29 + irq_base);
274 printk(KERN_INFO "macio: fixed media-bay irq on gatwick\n");
275 }
276
277 /* Fix left media bay childs */
278 if (dev->media_bay != NULL && of_node_name_eq(np, "floppy")) {
279 macio_create_fixup_irq(dev, 0, 19 + irq_base);
280 macio_create_fixup_irq(dev, 1, 1 + irq_base);
281 printk(KERN_INFO "macio: fixed left floppy irqs\n");
282 }
283 if (dev->media_bay != NULL && of_node_name_eq(np, "ata4")) {
284 macio_create_fixup_irq(dev, 0, 14 + irq_base);
285 macio_create_fixup_irq(dev, 0, 3 + irq_base);
286 printk(KERN_INFO "macio: fixed left ide irqs\n");
287 }
288}
289
290static void macio_setup_interrupts(struct macio_dev *dev)
291{
292 struct device_node *np = dev->ofdev.dev.of_node;
293 unsigned int irq;
294 int i = 0, j = 0;
295
296 for (;;) {
297 struct resource *res;
298
299 if (j >= MACIO_DEV_COUNT_IRQS)
300 break;
301 res = &dev->interrupt[j];
302 irq = irq_of_parse_and_map(np, i++);
303 if (!irq)
304 break;
305 res->start = irq;
306 res->flags = IORESOURCE_IRQ;
307 res->name = dev_name(&dev->ofdev.dev);
308 if (macio_resource_quirks(np, res, i - 1)) {
309 memset(res, 0, sizeof(struct resource));
310 continue;
311 } else
312 j++;
313 }
314 dev->n_interrupts = j;
315}
316
317static void macio_setup_resources(struct macio_dev *dev,
318 struct resource *parent_res)
319{
320 struct device_node *np = dev->ofdev.dev.of_node;
321 struct resource r;
322 int index;
323
324 for (index = 0; of_address_to_resource(np, index, &r) == 0; index++) {
325 struct resource *res;
326 if (index >= MACIO_DEV_COUNT_RESOURCES)
327 break;
328 res = &dev->resource[index];
329 *res = r;
330 res->name = dev_name(&dev->ofdev.dev);
331
332 if (macio_resource_quirks(np, res, index)) {
333 memset(res, 0, sizeof(struct resource));
334 continue;
335 }
336 /* Currently, we consider failure as harmless, this may
337 * change in the future, once I've found all the device
338 * tree bugs in older machines & worked around them
339 */
340 if (insert_resource(parent_res, res)) {
341 printk(KERN_WARNING "Can't request resource "
342 "%d for MacIO device %s\n",
343 index, dev_name(&dev->ofdev.dev));
344 }
345 }
346 dev->n_resources = index;
347}
348
349/**
350 * macio_add_one_device - Add one device from OF node to the device tree
351 * @chip: pointer to the macio_chip holding the device
352 * @np: pointer to the device node in the OF tree
353 * @in_bay: set to 1 if device is part of a media-bay
354 *
355 * When media-bay is changed to hotswap drivers, this function will
356 * be exposed to the bay driver some way...
357 */
358static struct macio_dev * macio_add_one_device(struct macio_chip *chip,
359 struct device *parent,
360 struct device_node *np,
361 struct macio_dev *in_bay,
362 struct resource *parent_res)
363{
364 char name[MAX_NODE_NAME_SIZE + 1];
365 struct macio_dev *dev;
366 const u32 *reg;
367
368 if (np == NULL)
369 return NULL;
370
371 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
372 if (!dev)
373 return NULL;
374
375 dev->bus = &chip->lbus;
376 dev->media_bay = in_bay;
377 dev->ofdev.dev.of_node = np;
378 dev->ofdev.archdata.dma_mask = 0xffffffffUL;
379 dev->ofdev.dev.dma_mask = &dev->ofdev.archdata.dma_mask;
380 dev->ofdev.dev.coherent_dma_mask = dev->ofdev.archdata.dma_mask;
381 dev->ofdev.dev.parent = parent;
382 dev->ofdev.dev.bus = &macio_bus_type;
383 dev->ofdev.dev.release = macio_release_dev;
384 dev->ofdev.dev.dma_parms = &dev->dma_parms;
385
386 /* Standard DMA paremeters */
387 dma_set_max_seg_size(&dev->ofdev.dev, 65536);
388 dma_set_seg_boundary(&dev->ofdev.dev, 0xffffffff);
389
390#if defined(CONFIG_PCI) && defined(CONFIG_ARCH_HAS_DMA_OPS)
391 /* Set the DMA ops to the ones from the PCI device, this could be
392 * fishy if we didn't know that on PowerMac it's always direct ops
393 * or iommu ops that will work fine
394 *
395 * To get all the fields, copy all archdata
396 */
397 dev->ofdev.dev.archdata = chip->lbus.pdev->dev.archdata;
398 dev->ofdev.dev.dma_ops = chip->lbus.pdev->dev.dma_ops;
399#endif /* CONFIG_PCI && CONFIG_ARCH_HAS_DMA_OPS */
400
401#ifdef DEBUG
402 printk("preparing mdev @%p, ofdev @%p, dev @%p, kobj @%p\n",
403 dev, &dev->ofdev, &dev->ofdev.dev, &dev->ofdev.dev.kobj);
404#endif
405
406 /* MacIO itself has a different reg, we use it's PCI base */
407 snprintf(name, sizeof(name), "%pOFn", np);
408 if (np == chip->of_node) {
409 dev_set_name(&dev->ofdev.dev, "%1d.%08x:%.*s",
410 chip->lbus.index,
411#ifdef CONFIG_PCI
412 (unsigned int)pci_resource_start(chip->lbus.pdev, 0),
413#else
414 0, /* NuBus may want to do something better here */
415#endif
416 MAX_NODE_NAME_SIZE, name);
417 } else {
418 reg = of_get_property(np, "reg", NULL);
419 dev_set_name(&dev->ofdev.dev, "%1d.%08x:%.*s",
420 chip->lbus.index,
421 reg ? *reg : 0, MAX_NODE_NAME_SIZE, name);
422 }
423
424 /* Setup interrupts & resources */
425 macio_setup_interrupts(dev);
426 macio_setup_resources(dev, parent_res);
427 macio_add_missing_resources(dev);
428
429 /* Register with core */
430 if (of_device_register(&dev->ofdev) != 0) {
431 printk(KERN_DEBUG"macio: device registration error for %s!\n",
432 dev_name(&dev->ofdev.dev));
433 put_device(&dev->ofdev.dev);
434 return NULL;
435 }
436
437 return dev;
438}
439
440static int macio_skip_device(struct device_node *np)
441{
442 return of_node_name_prefix(np, "battery") ||
443 of_node_name_prefix(np, "escc-legacy");
444}
445
446/**
447 * macio_pci_add_devices - Adds sub-devices of mac-io to the device tree
448 * @chip: pointer to the macio_chip holding the devices
449 *
450 * This function will do the job of extracting devices from the
451 * Open Firmware device tree, build macio_dev structures and add
452 * them to the Linux device tree.
453 *
454 * For now, childs of media-bay are added now as well. This will
455 * change rsn though.
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 /* Add a node for the macio bus itself */
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 /* Add macio itself to hierarchy */
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 /* First scan 1st level */
482 for_each_child_of_node(pnode, np) {
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 (of_node_name_prefix(np, "media-bay"))
491 mbdev = mdev;
492 else if (of_node_name_prefix(np, "escc"))
493 sdev = mdev;
494 }
495
496 /* Add media bay devices if any */
497 if (mbdev) {
498 pnode = mbdev->ofdev.dev.of_node;
499 for_each_child_of_node(pnode, np) {
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 /* Add serial ports if any */
510 if (sdev) {
511 pnode = sdev->ofdev.dev.of_node;
512 for_each_child_of_node(pnode, np) {
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 * macio_register_driver - Registers a new MacIO device driver
526 * @drv: pointer to the driver definition structure
527 */
528int macio_register_driver(struct macio_driver *drv)
529{
530 /* initialize common driver fields */
531 drv->driver.bus = &macio_bus_type;
532
533 /* register with core */
534 return driver_register(&drv->driver);
535}
536
537/**
538 * macio_unregister_driver - Unregisters a new MacIO device driver
539 * @drv: pointer to the driver definition structure
540 */
541void macio_unregister_driver(struct macio_driver *drv)
542{
543 driver_unregister(&drv->driver);
544}
545
546/* Managed MacIO resources */
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 * macio_request_resource - Request an MMIO resource
584 * @dev: pointer to the device holding the resource
585 * @resource_no: resource number to request
586 * @name: resource name
587 *
588 * Mark memory region number @resource_no associated with MacIO
589 * device @dev as being reserved by owner @name. Do not access
590 * any address inside the memory regions unless this call returns
591 * successfully.
592 *
593 * Returns 0 on success, or %EBUSY on error. A warning
594 * message is also printed on failure.
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 * macio_release_resource - Release an MMIO resource
626 * @dev: pointer to the device holding the resource
627 * @resource_no: resource number to release
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 * macio_request_resources - Reserve all memory resources
643 * @dev: MacIO device whose resources are to be reserved
644 * @name: Name to be associated with resource.
645 *
646 * Mark all memory regions associated with MacIO device @dev as
647 * being reserved by owner @name. Do not access any address inside
648 * the memory regions unless this call returns successfully.
649 *
650 * Returns 0 on success, or %EBUSY on error. A warning
651 * message is also printed on failure.
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 * macio_release_resources - Release reserved memory resources
671 * @dev: MacIO device whose resources were previously reserved
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 /* Note regarding refcounting: We assume pci_device_to_OF_node() is
694 * ported to new OF APIs and returns a node with refcount incremented.
695 */
696 np = pci_device_to_OF_node(pdev);
697 if (np == NULL)
698 return -ENODEV;
699
700 /* The above assumption is wrong !!!
701 * fix that here for now until I fix the arch code
702 */
703 of_node_get(np);
704
705 /* We also assume that pmac_feature will have done a get() on nodes
706 * stored in the macio chips array
707 */
708 chip = macio_find(np, macio_unknown);
709 of_node_put(np);
710 if (chip == NULL)
711 return -ENODEV;
712
713 /* XXX Need locking ??? */
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 * HACK ALERT: The WallStreet PowerBook and some OHare based machines
726 * have 2 macio ASICs. I must probe the "main" one first or IDE
727 * ordering will be incorrect. So I put on "hold" the second one since
728 * it seem to appear first on PCI
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 * MacIO is matched against any Apple ID, it's probe() function
752 * will then decide wether it applies or not
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 }, { /* end: all zeroes */ }
761};
762MODULE_DEVICE_TABLE (pci, pci_ids);
763
764/* pci driver glue; this is a "new style" PCI driver module */
765static struct pci_driver macio_pci_driver = {
766 .name = "macio",
767 .id_table = pci_ids,
768
769 .probe = macio_pci_probe,
770 .remove = macio_pci_remove,
771};
772
773#endif /* CONFIG_PCI */
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 /* CONFIG_PCI */
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
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_platform.h>
27#include <linux/of_irq.h>
28
29#include <asm/machdep.h>
30#include <asm/macio.h>
31#include <asm/pmac_feature.h>
32
33#undef DEBUG
34
35#define MAX_NODE_NAME_SIZE (20 - 12)
36
37static struct macio_chip *macio_on_hold;
38
39static int macio_bus_match(struct device *dev, struct device_driver *drv)
40{
41 const struct of_device_id * matches = drv->of_match_table;
42
43 if (!matches)
44 return 0;
45
46 return of_match_device(matches, dev) != NULL;
47}
48
49struct macio_dev *macio_dev_get(struct macio_dev *dev)
50{
51 struct device *tmp;
52
53 if (!dev)
54 return NULL;
55 tmp = get_device(&dev->ofdev.dev);
56 if (tmp)
57 return to_macio_device(tmp);
58 else
59 return NULL;
60}
61
62void macio_dev_put(struct macio_dev *dev)
63{
64 if (dev)
65 put_device(&dev->ofdev.dev);
66}
67
68
69static int macio_device_probe(struct device *dev)
70{
71 int error = -ENODEV;
72 struct macio_driver *drv;
73 struct macio_dev *macio_dev;
74 const struct of_device_id *match;
75
76 drv = to_macio_driver(dev->driver);
77 macio_dev = to_macio_device(dev);
78
79 if (!drv->probe)
80 return error;
81
82 macio_dev_get(macio_dev);
83
84 match = of_match_device(drv->driver.of_match_table, dev);
85 if (match)
86 error = drv->probe(macio_dev, match);
87 if (error)
88 macio_dev_put(macio_dev);
89
90 return error;
91}
92
93static void macio_device_remove(struct device *dev)
94{
95 struct macio_dev * macio_dev = to_macio_device(dev);
96 struct macio_driver * drv = to_macio_driver(dev->driver);
97
98 if (dev->driver && drv->remove)
99 drv->remove(macio_dev);
100 macio_dev_put(macio_dev);
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
132static int macio_device_modalias(const struct device *dev, struct kobj_uevent_env *env)
133{
134 return of_device_uevent_modalias(dev, env);
135}
136
137extern const struct attribute_group *macio_dev_groups[];
138
139struct bus_type macio_bus_type = {
140 .name = "macio",
141 .match = macio_bus_match,
142 .uevent = macio_device_modalias,
143 .probe = macio_device_probe,
144 .remove = macio_device_remove,
145 .shutdown = macio_device_shutdown,
146 .suspend = macio_device_suspend,
147 .resume = macio_device_resume,
148 .dev_groups = macio_dev_groups,
149};
150
151static int __init macio_bus_driver_init(void)
152{
153 return bus_register(&macio_bus_type);
154}
155
156postcore_initcall(macio_bus_driver_init);
157
158
159/**
160 * macio_release_dev - free a macio device structure when all users of it are
161 * finished.
162 * @dev: device that's been disconnected
163 *
164 * Will be called only by the device core when all users of this macio device
165 * are done. This currently means never as we don't hot remove any macio
166 * device yet, though that will happen with mediabay based devices in a later
167 * implementation.
168 */
169static void macio_release_dev(struct device *dev)
170{
171 struct macio_dev *mdev;
172
173 mdev = to_macio_device(dev);
174 kfree(mdev);
175}
176
177/**
178 * macio_resource_quirks - tweak or skip some resources for a device
179 * @np: pointer to the device node
180 * @res: resulting resource
181 * @index: index of resource in node
182 *
183 * If this routine returns non-null, then the resource is completely
184 * skipped.
185 */
186static int macio_resource_quirks(struct device_node *np, struct resource *res,
187 int index)
188{
189 /* Only quirks for memory resources for now */
190 if ((res->flags & IORESOURCE_MEM) == 0)
191 return 0;
192
193 /* Grand Central has too large resource 0 on some machines */
194 if (index == 0 && of_node_name_eq(np, "gc"))
195 res->end = res->start + 0x1ffff;
196
197 /* Airport has bogus resource 2 */
198 if (index >= 2 && of_node_name_eq(np, "radio"))
199 return 1;
200
201#ifndef CONFIG_PPC64
202 /* DBDMAs may have bogus sizes */
203 if ((res->start & 0x0001f000) == 0x00008000)
204 res->end = res->start + 0xff;
205#endif /* CONFIG_PPC64 */
206
207 /* ESCC parent eats child resources. We could have added a
208 * level of hierarchy, but I don't really feel the need
209 * for it
210 */
211 if (of_node_name_eq(np, "escc"))
212 return 1;
213
214 /* ESCC has bogus resources >= 3 */
215 if (index >= 3 && (of_node_name_eq(np, "ch-a") ||
216 of_node_name_eq(np, "ch-b")))
217 return 1;
218
219 /* Media bay has too many resources, keep only first one */
220 if (index > 0 && of_node_name_eq(np, "media-bay"))
221 return 1;
222
223 /* Some older IDE resources have bogus sizes */
224 if (of_node_name_eq(np, "IDE") || of_node_name_eq(np, "ATA") ||
225 of_node_is_type(np, "ide") || of_node_is_type(np, "ata")) {
226 if (index == 0 && (res->end - res->start) > 0xfff)
227 res->end = res->start + 0xfff;
228 if (index == 1 && (res->end - res->start) > 0xff)
229 res->end = res->start + 0xff;
230 }
231 return 0;
232}
233
234static void macio_create_fixup_irq(struct macio_dev *dev, int index,
235 unsigned int line)
236{
237 unsigned int irq;
238
239 irq = irq_create_mapping(NULL, line);
240 if (!irq) {
241 dev->interrupt[index].start = irq;
242 dev->interrupt[index].flags = IORESOURCE_IRQ;
243 dev->interrupt[index].name = dev_name(&dev->ofdev.dev);
244 }
245 if (dev->n_interrupts <= index)
246 dev->n_interrupts = index + 1;
247}
248
249static void macio_add_missing_resources(struct macio_dev *dev)
250{
251 struct device_node *np = dev->ofdev.dev.of_node;
252 unsigned int irq_base;
253
254 /* Gatwick has some missing interrupts on child nodes */
255 if (dev->bus->chip->type != macio_gatwick)
256 return;
257
258 /* irq_base is always 64 on gatwick. I have no cleaner way to get
259 * that value from here at this point
260 */
261 irq_base = 64;
262
263 /* Fix SCC */
264 if (of_node_name_eq(np, "ch-a")) {
265 macio_create_fixup_irq(dev, 0, 15 + irq_base);
266 macio_create_fixup_irq(dev, 1, 4 + irq_base);
267 macio_create_fixup_irq(dev, 2, 5 + irq_base);
268 printk(KERN_INFO "macio: fixed SCC irqs on gatwick\n");
269 }
270
271 /* Fix media-bay */
272 if (of_node_name_eq(np, "media-bay")) {
273 macio_create_fixup_irq(dev, 0, 29 + irq_base);
274 printk(KERN_INFO "macio: fixed media-bay irq on gatwick\n");
275 }
276
277 /* Fix left media bay childs */
278 if (dev->media_bay != NULL && of_node_name_eq(np, "floppy")) {
279 macio_create_fixup_irq(dev, 0, 19 + irq_base);
280 macio_create_fixup_irq(dev, 1, 1 + irq_base);
281 printk(KERN_INFO "macio: fixed left floppy irqs\n");
282 }
283 if (dev->media_bay != NULL && of_node_name_eq(np, "ata4")) {
284 macio_create_fixup_irq(dev, 0, 14 + irq_base);
285 macio_create_fixup_irq(dev, 0, 3 + irq_base);
286 printk(KERN_INFO "macio: fixed left ide irqs\n");
287 }
288}
289
290static void macio_setup_interrupts(struct macio_dev *dev)
291{
292 struct device_node *np = dev->ofdev.dev.of_node;
293 unsigned int irq;
294 int i = 0, j = 0;
295
296 for (;;) {
297 struct resource *res;
298
299 if (j >= MACIO_DEV_COUNT_IRQS)
300 break;
301 res = &dev->interrupt[j];
302 irq = irq_of_parse_and_map(np, i++);
303 if (!irq)
304 break;
305 res->start = irq;
306 res->flags = IORESOURCE_IRQ;
307 res->name = dev_name(&dev->ofdev.dev);
308 if (macio_resource_quirks(np, res, i - 1)) {
309 memset(res, 0, sizeof(struct resource));
310 continue;
311 } else
312 j++;
313 }
314 dev->n_interrupts = j;
315}
316
317static void macio_setup_resources(struct macio_dev *dev,
318 struct resource *parent_res)
319{
320 struct device_node *np = dev->ofdev.dev.of_node;
321 struct resource r;
322 int index;
323
324 for (index = 0; of_address_to_resource(np, index, &r) == 0; index++) {
325 struct resource *res;
326 if (index >= MACIO_DEV_COUNT_RESOURCES)
327 break;
328 res = &dev->resource[index];
329 *res = r;
330 res->name = dev_name(&dev->ofdev.dev);
331
332 if (macio_resource_quirks(np, res, index)) {
333 memset(res, 0, sizeof(struct resource));
334 continue;
335 }
336 /* Currently, we consider failure as harmless, this may
337 * change in the future, once I've found all the device
338 * tree bugs in older machines & worked around them
339 */
340 if (insert_resource(parent_res, res)) {
341 printk(KERN_WARNING "Can't request resource "
342 "%d for MacIO device %s\n",
343 index, dev_name(&dev->ofdev.dev));
344 }
345 }
346 dev->n_resources = index;
347}
348
349/**
350 * macio_add_one_device - Add one device from OF node to the device tree
351 * @chip: pointer to the macio_chip holding the device
352 * @np: pointer to the device node in the OF tree
353 * @in_bay: set to 1 if device is part of a media-bay
354 *
355 * When media-bay is changed to hotswap drivers, this function will
356 * be exposed to the bay driver some way...
357 */
358static struct macio_dev * macio_add_one_device(struct macio_chip *chip,
359 struct device *parent,
360 struct device_node *np,
361 struct macio_dev *in_bay,
362 struct resource *parent_res)
363{
364 char name[MAX_NODE_NAME_SIZE + 1];
365 struct macio_dev *dev;
366 const u32 *reg;
367
368 if (np == NULL)
369 return NULL;
370
371 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
372 if (!dev)
373 return NULL;
374
375 dev->bus = &chip->lbus;
376 dev->media_bay = in_bay;
377 dev->ofdev.dev.of_node = np;
378 dev->ofdev.archdata.dma_mask = 0xffffffffUL;
379 dev->ofdev.dev.dma_mask = &dev->ofdev.archdata.dma_mask;
380 dev->ofdev.dev.coherent_dma_mask = dev->ofdev.archdata.dma_mask;
381 dev->ofdev.dev.parent = parent;
382 dev->ofdev.dev.bus = &macio_bus_type;
383 dev->ofdev.dev.release = macio_release_dev;
384 dev->ofdev.dev.dma_parms = &dev->dma_parms;
385
386 /* Standard DMA paremeters */
387 dma_set_max_seg_size(&dev->ofdev.dev, 65536);
388 dma_set_seg_boundary(&dev->ofdev.dev, 0xffffffff);
389
390#if defined(CONFIG_PCI) && defined(CONFIG_DMA_OPS)
391 /* Set the DMA ops to the ones from the PCI device, this could be
392 * fishy if we didn't know that on PowerMac it's always direct ops
393 * or iommu ops that will work fine
394 *
395 * To get all the fields, copy all archdata
396 */
397 dev->ofdev.dev.archdata = chip->lbus.pdev->dev.archdata;
398 dev->ofdev.dev.dma_ops = chip->lbus.pdev->dev.dma_ops;
399#endif /* CONFIG_PCI && CONFIG_DMA_OPS */
400
401#ifdef DEBUG
402 printk("preparing mdev @%p, ofdev @%p, dev @%p, kobj @%p\n",
403 dev, &dev->ofdev, &dev->ofdev.dev, &dev->ofdev.dev.kobj);
404#endif
405
406 /* MacIO itself has a different reg, we use it's PCI base */
407 snprintf(name, sizeof(name), "%pOFn", np);
408 if (np == chip->of_node) {
409 dev_set_name(&dev->ofdev.dev, "%1d.%08x:%.*s",
410 chip->lbus.index,
411#ifdef CONFIG_PCI
412 (unsigned int)pci_resource_start(chip->lbus.pdev, 0),
413#else
414 0, /* NuBus may want to do something better here */
415#endif
416 MAX_NODE_NAME_SIZE, name);
417 } else {
418 reg = of_get_property(np, "reg", NULL);
419 dev_set_name(&dev->ofdev.dev, "%1d.%08x:%.*s",
420 chip->lbus.index,
421 reg ? *reg : 0, MAX_NODE_NAME_SIZE, name);
422 }
423
424 /* Setup interrupts & resources */
425 macio_setup_interrupts(dev);
426 macio_setup_resources(dev, parent_res);
427 macio_add_missing_resources(dev);
428
429 /* Register with core */
430 if (of_device_register(&dev->ofdev) != 0) {
431 printk(KERN_DEBUG"macio: device registration error for %s!\n",
432 dev_name(&dev->ofdev.dev));
433 put_device(&dev->ofdev.dev);
434 return NULL;
435 }
436
437 return dev;
438}
439
440static int macio_skip_device(struct device_node *np)
441{
442 return of_node_name_prefix(np, "battery") ||
443 of_node_name_prefix(np, "escc-legacy");
444}
445
446/**
447 * macio_pci_add_devices - Adds sub-devices of mac-io to the device tree
448 * @chip: pointer to the macio_chip holding the devices
449 *
450 * This function will do the job of extracting devices from the
451 * Open Firmware device tree, build macio_dev structures and add
452 * them to the Linux device tree.
453 *
454 * For now, childs of media-bay are added now as well. This will
455 * change rsn though.
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 /* Add a node for the macio bus itself */
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 /* Add macio itself to hierarchy */
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 /* First scan 1st level */
482 for_each_child_of_node(pnode, np) {
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 (of_node_name_prefix(np, "media-bay"))
491 mbdev = mdev;
492 else if (of_node_name_prefix(np, "escc"))
493 sdev = mdev;
494 }
495
496 /* Add media bay devices if any */
497 if (mbdev) {
498 pnode = mbdev->ofdev.dev.of_node;
499 for_each_child_of_node(pnode, np) {
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 /* Add serial ports if any */
510 if (sdev) {
511 pnode = sdev->ofdev.dev.of_node;
512 for_each_child_of_node(pnode, np) {
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 * macio_register_driver - Registers a new MacIO device driver
526 * @drv: pointer to the driver definition structure
527 */
528int macio_register_driver(struct macio_driver *drv)
529{
530 /* initialize common driver fields */
531 drv->driver.bus = &macio_bus_type;
532
533 /* register with core */
534 return driver_register(&drv->driver);
535}
536
537/**
538 * macio_unregister_driver - Unregisters a new MacIO device driver
539 * @drv: pointer to the driver definition structure
540 */
541void macio_unregister_driver(struct macio_driver *drv)
542{
543 driver_unregister(&drv->driver);
544}
545
546/* Managed MacIO resources */
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 * macio_request_resource - Request an MMIO resource
584 * @dev: pointer to the device holding the resource
585 * @resource_no: resource number to request
586 * @name: resource name
587 *
588 * Mark memory region number @resource_no associated with MacIO
589 * device @dev as being reserved by owner @name. Do not access
590 * any address inside the memory regions unless this call returns
591 * successfully.
592 *
593 * Returns 0 on success, or %EBUSY on error. A warning
594 * message is also printed on failure.
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 * macio_release_resource - Release an MMIO resource
626 * @dev: pointer to the device holding the resource
627 * @resource_no: resource number to release
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 * macio_request_resources - Reserve all memory resources
643 * @dev: MacIO device whose resources are to be reserved
644 * @name: Name to be associated with resource.
645 *
646 * Mark all memory regions associated with MacIO device @dev as
647 * being reserved by owner @name. Do not access any address inside
648 * the memory regions unless this call returns successfully.
649 *
650 * Returns 0 on success, or %EBUSY on error. A warning
651 * message is also printed on failure.
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 * macio_release_resources - Release reserved memory resources
671 * @dev: MacIO device whose resources were previously reserved
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 /* Note regarding refcounting: We assume pci_device_to_OF_node() is
694 * ported to new OF APIs and returns a node with refcount incremented.
695 */
696 np = pci_device_to_OF_node(pdev);
697 if (np == NULL)
698 return -ENODEV;
699
700 /* The above assumption is wrong !!!
701 * fix that here for now until I fix the arch code
702 */
703 of_node_get(np);
704
705 /* We also assume that pmac_feature will have done a get() on nodes
706 * stored in the macio chips array
707 */
708 chip = macio_find(np, macio_unknown);
709 of_node_put(np);
710 if (chip == NULL)
711 return -ENODEV;
712
713 /* XXX Need locking ??? */
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 * HACK ALERT: The WallStreet PowerBook and some OHare based machines
726 * have 2 macio ASICs. I must probe the "main" one first or IDE
727 * ordering will be incorrect. So I put on "hold" the second one since
728 * it seem to appear first on PCI
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 * MacIO is matched against any Apple ID, it's probe() function
752 * will then decide wether it applies or not
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 }, { /* end: all zeroes */ }
761};
762MODULE_DEVICE_TABLE (pci, pci_ids);
763
764/* pci driver glue; this is a "new style" PCI driver module */
765static struct pci_driver macio_pci_driver = {
766 .name = "macio",
767 .id_table = pci_ids,
768
769 .probe = macio_pci_probe,
770 .remove = macio_pci_remove,
771};
772
773#endif /* CONFIG_PCI */
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 /* CONFIG_PCI */
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