Version:  2.0.40 2.2.26 2.4.37 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8

Linux/drivers/macintosh/macio_asic.c

  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 
 39 static struct macio_chip      *macio_on_hold;
 40 
 41 static 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 
 51 struct 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 
 64 void macio_dev_put(struct macio_dev *dev)
 65 {
 66         if (dev)
 67                 put_device(&dev->ofdev.dev);
 68 }
 69 
 70 
 71 static 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 
 95 static 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 
107 static 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 
116 static 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 
126 static 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 
136 extern struct device_attribute macio_dev_attrs[];
137 
138 struct 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 
150 static int __init macio_bus_driver_init(void)
151 {
152         return bus_register(&macio_bus_type);
153 }
154 
155 postcore_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  */
168 static 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  */
185 static 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 
233 static 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 
248 static 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 
289 static 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 
316 static 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  */
357 static 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 
435 static 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  */
455 static 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  */
526 int 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  */
539 void macio_unregister_driver(struct macio_driver *drv)
540 {
541         driver_unregister(&drv->driver);
542 }
543 
544 /* Managed MacIO resources */
545 struct macio_devres {
546         u32     res_mask;
547 };
548 
549 static 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 
562 int 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 
575 static 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  */
594 int 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 
612 err_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  */
627 void 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  */
651 int 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 
660 err_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 
672 void 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 
683 static 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 
743 static 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  */
752 static 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 };
760 MODULE_DEVICE_TABLE (pci, pci_ids);
761 
762 /* pci driver glue; this is a "new style" PCI driver module */
763 static 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 
773 static 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 
785 module_init(macio_module_init);
786 
787 EXPORT_SYMBOL(macio_register_driver);
788 EXPORT_SYMBOL(macio_unregister_driver);
789 EXPORT_SYMBOL(macio_dev_get);
790 EXPORT_SYMBOL(macio_dev_put);
791 EXPORT_SYMBOL(macio_request_resource);
792 EXPORT_SYMBOL(macio_release_resource);
793 EXPORT_SYMBOL(macio_request_resources);
794 EXPORT_SYMBOL(macio_release_resources);
795 EXPORT_SYMBOL(macio_enable_devres);
796 
797 

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