Version:  2.0.40 2.2.26 2.4.37 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17

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 #include <asm/pci-bridge.h>
 35 
 36 #undef DEBUG
 37 
 38 #define MAX_NODE_NAME_SIZE (20 - 12)
 39 
 40 static struct macio_chip      *macio_on_hold;
 41 
 42 static int macio_bus_match(struct device *dev, struct device_driver *drv) 
 43 {
 44         const struct of_device_id * matches = drv->of_match_table;
 45 
 46         if (!matches) 
 47                 return 0;
 48 
 49         return of_match_device(matches, dev) != NULL;
 50 }
 51 
 52 struct macio_dev *macio_dev_get(struct macio_dev *dev)
 53 {
 54         struct device *tmp;
 55 
 56         if (!dev)
 57                 return NULL;
 58         tmp = get_device(&dev->ofdev.dev);
 59         if (tmp)
 60                 return to_macio_device(tmp);
 61         else
 62                 return NULL;
 63 }
 64 
 65 void macio_dev_put(struct macio_dev *dev)
 66 {
 67         if (dev)
 68                 put_device(&dev->ofdev.dev);
 69 }
 70 
 71 
 72 static int macio_device_probe(struct device *dev)
 73 {
 74         int error = -ENODEV;
 75         struct macio_driver *drv;
 76         struct macio_dev *macio_dev;
 77         const struct of_device_id *match;
 78 
 79         drv = to_macio_driver(dev->driver);
 80         macio_dev = to_macio_device(dev);
 81 
 82         if (!drv->probe)
 83                 return error;
 84 
 85         macio_dev_get(macio_dev);
 86 
 87         match = of_match_device(drv->driver.of_match_table, dev);
 88         if (match)
 89                 error = drv->probe(macio_dev, match);
 90         if (error)
 91                 macio_dev_put(macio_dev);
 92 
 93         return error;
 94 }
 95 
 96 static int macio_device_remove(struct device *dev)
 97 {
 98         struct macio_dev * macio_dev = to_macio_device(dev);
 99         struct macio_driver * drv = to_macio_driver(dev->driver);
100 
101         if (dev->driver && drv->remove)
102                 drv->remove(macio_dev);
103         macio_dev_put(macio_dev);
104 
105         return 0;
106 }
107 
108 static void macio_device_shutdown(struct device *dev)
109 {
110         struct macio_dev * macio_dev = to_macio_device(dev);
111         struct macio_driver * drv = to_macio_driver(dev->driver);
112 
113         if (dev->driver && drv->shutdown)
114                 drv->shutdown(macio_dev);
115 }
116 
117 static int macio_device_suspend(struct device *dev, pm_message_t state)
118 {
119         struct macio_dev * macio_dev = to_macio_device(dev);
120         struct macio_driver * drv = to_macio_driver(dev->driver);
121 
122         if (dev->driver && drv->suspend)
123                 return drv->suspend(macio_dev, state);
124         return 0;
125 }
126 
127 static int macio_device_resume(struct device * dev)
128 {
129         struct macio_dev * macio_dev = to_macio_device(dev);
130         struct macio_driver * drv = to_macio_driver(dev->driver);
131 
132         if (dev->driver && drv->resume)
133                 return drv->resume(macio_dev);
134         return 0;
135 }
136 
137 extern struct device_attribute macio_dev_attrs[];
138 
139 struct bus_type macio_bus_type = {
140        .name    = "macio",
141        .match   = macio_bus_match,
142        .uevent = of_device_uevent_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_attrs = macio_dev_attrs,
149 };
150 
151 static int __init macio_bus_driver_init(void)
152 {
153         return bus_register(&macio_bus_type);
154 }
155 
156 postcore_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  */
169 static 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  */
186 static 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 && !strcmp(np->name, "gc"))
195                 res->end = res->start + 0x1ffff;
196 
197         /* Airport has bogus resource 2 */
198         if (index >= 2 && !strcmp(np->name, "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 (!strcmp(np->name, "escc"))
212                 return 1;
213 
214         /* ESCC has bogus resources >= 3 */
215         if (index >= 3 && !(strcmp(np->name, "ch-a") &&
216                             strcmp(np->name, "ch-b")))
217                 return 1;
218 
219         /* Media bay has too many resources, keep only first one */
220         if (index > 0 && !strcmp(np->name, "media-bay"))
221                 return 1;
222 
223         /* Some older IDE resources have bogus sizes */
224         if (!(strcmp(np->name, "IDE") && strcmp(np->name, "ATA") &&
225               strcmp(np->type, "ide") && strcmp(np->type, "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 
234 static 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 != NO_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 
249 static 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 (strcmp(np->name, "ch-a") == 0) {
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 (strcmp(np->name, "media-bay") == 0) {
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 && strcmp(np->name, "floppy") == 0) {
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 && strcasecmp(np->name, "ata4") == 0) {
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 
290 static 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 == NO_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 
317 static 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  */
358 static 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         struct macio_dev *dev;
365         const u32 *reg;
366         
367         if (np == NULL)
368                 return NULL;
369 
370         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
371         if (!dev)
372                 return NULL;
373 
374         dev->bus = &chip->lbus;
375         dev->media_bay = in_bay;
376         dev->ofdev.dev.of_node = np;
377         dev->ofdev.archdata.dma_mask = 0xffffffffUL;
378         dev->ofdev.dev.dma_mask = &dev->ofdev.archdata.dma_mask;
379         dev->ofdev.dev.parent = parent;
380         dev->ofdev.dev.bus = &macio_bus_type;
381         dev->ofdev.dev.release = macio_release_dev;
382         dev->ofdev.dev.dma_parms = &dev->dma_parms;
383 
384         /* Standard DMA paremeters */
385         dma_set_max_seg_size(&dev->ofdev.dev, 65536);
386         dma_set_seg_boundary(&dev->ofdev.dev, 0xffffffff);
387 
388 #ifdef CONFIG_PCI
389         /* Set the DMA ops to the ones from the PCI device, this could be
390          * fishy if we didn't know that on PowerMac it's always direct ops
391          * or iommu ops that will work fine
392          *
393          * To get all the fields, copy all archdata
394          */
395         dev->ofdev.dev.archdata = chip->lbus.pdev->dev.archdata;
396 #endif /* CONFIG_PCI */
397 
398 #ifdef DEBUG
399         printk("preparing mdev @%p, ofdev @%p, dev @%p, kobj @%p\n",
400                dev, &dev->ofdev, &dev->ofdev.dev, &dev->ofdev.dev.kobj);
401 #endif
402 
403         /* MacIO itself has a different reg, we use it's PCI base */
404         if (np == chip->of_node) {
405                 dev_set_name(&dev->ofdev.dev, "%1d.%08x:%.*s",
406                              chip->lbus.index,
407 #ifdef CONFIG_PCI
408                         (unsigned int)pci_resource_start(chip->lbus.pdev, 0),
409 #else
410                         0, /* NuBus may want to do something better here */
411 #endif
412                         MAX_NODE_NAME_SIZE, np->name);
413         } else {
414                 reg = of_get_property(np, "reg", NULL);
415                 dev_set_name(&dev->ofdev.dev, "%1d.%08x:%.*s",
416                              chip->lbus.index,
417                              reg ? *reg : 0, MAX_NODE_NAME_SIZE, np->name);
418         }
419 
420         /* Setup interrupts & resources */
421         macio_setup_interrupts(dev);
422         macio_setup_resources(dev, parent_res);
423         macio_add_missing_resources(dev);
424 
425         /* Register with core */
426         if (of_device_register(&dev->ofdev) != 0) {
427                 printk(KERN_DEBUG"macio: device registration error for %s!\n",
428                        dev_name(&dev->ofdev.dev));
429                 kfree(dev);
430                 return NULL;
431         }
432 
433         return dev;
434 }
435 
436 static int macio_skip_device(struct device_node *np)
437 {
438         if (strncmp(np->name, "battery", 7) == 0)
439                 return 1;
440         if (strncmp(np->name, "escc-legacy", 11) == 0)
441                 return 1;
442         return 0;
443 }
444 
445 /**
446  * macio_pci_add_devices - Adds sub-devices of mac-io to the device tree
447  * @chip: pointer to the macio_chip holding the devices
448  * 
449  * This function will do the job of extracting devices from the
450  * Open Firmware device tree, build macio_dev structures and add
451  * them to the Linux device tree.
452  * 
453  * For now, childs of media-bay are added now as well. This will
454  * change rsn though.
455  */
456 static void macio_pci_add_devices(struct macio_chip *chip)
457 {
458         struct device_node *np, *pnode;
459         struct macio_dev *rdev, *mdev, *mbdev = NULL, *sdev = NULL;
460         struct device *parent = NULL;
461         struct resource *root_res = &iomem_resource;
462         
463         /* Add a node for the macio bus itself */
464 #ifdef CONFIG_PCI
465         if (chip->lbus.pdev) {
466                 parent = &chip->lbus.pdev->dev;
467                 root_res = &chip->lbus.pdev->resource[0];
468         }
469 #endif
470         pnode = of_node_get(chip->of_node);
471         if (pnode == NULL)
472                 return;
473 
474         /* Add macio itself to hierarchy */
475         rdev = macio_add_one_device(chip, parent, pnode, NULL, root_res);
476         if (rdev == NULL)
477                 return;
478         root_res = &rdev->resource[0];
479 
480         /* First scan 1st level */
481         for (np = NULL; (np = of_get_next_child(pnode, np)) != NULL;) {
482                 if (macio_skip_device(np))
483                         continue;
484                 of_node_get(np);
485                 mdev = macio_add_one_device(chip, &rdev->ofdev.dev, np, NULL,
486                                             root_res);
487                 if (mdev == NULL)
488                         of_node_put(np);
489                 else if (strncmp(np->name, "media-bay", 9) == 0)
490                         mbdev = mdev;
491                 else if (strncmp(np->name, "escc", 4) == 0)
492                         sdev = mdev;
493         }
494 
495         /* Add media bay devices if any */
496         if (mbdev) {
497                 pnode = mbdev->ofdev.dev.of_node;
498                 for (np = NULL; (np = of_get_next_child(pnode, np)) != NULL;) {
499                         if (macio_skip_device(np))
500                                 continue;
501                         of_node_get(np);
502                         if (macio_add_one_device(chip, &mbdev->ofdev.dev, np,
503                                                  mbdev,  root_res) == NULL)
504                                 of_node_put(np);
505                 }
506         }
507 
508         /* Add serial ports if any */
509         if (sdev) {
510                 pnode = sdev->ofdev.dev.of_node;
511                 for (np = NULL; (np = of_get_next_child(pnode, np)) != NULL;) {
512                         if (macio_skip_device(np))
513                                 continue;
514                         of_node_get(np);
515                         if (macio_add_one_device(chip, &sdev->ofdev.dev, np,
516                                                  NULL, root_res) == NULL)
517                                 of_node_put(np);
518                 }
519         }
520 }
521 
522 
523 /**
524  * macio_register_driver - Registers a new MacIO device driver
525  * @drv: pointer to the driver definition structure
526  */
527 int macio_register_driver(struct macio_driver *drv)
528 {
529         /* initialize common driver fields */
530         drv->driver.bus = &macio_bus_type;
531 
532         /* register with core */
533         return driver_register(&drv->driver);
534 }
535 
536 /**
537  * macio_unregister_driver - Unregisters a new MacIO device driver
538  * @drv: pointer to the driver definition structure
539  */
540 void macio_unregister_driver(struct macio_driver *drv)
541 {
542         driver_unregister(&drv->driver);
543 }
544 
545 /* Managed MacIO resources */
546 struct macio_devres {
547         u32     res_mask;
548 };
549 
550 static void maciom_release(struct device *gendev, void *res)
551 {
552         struct macio_dev *dev = to_macio_device(gendev);
553         struct macio_devres *dr = res;
554         int i, max;
555 
556         max = min(dev->n_resources, 32);
557         for (i = 0; i < max; i++) {
558                 if (dr->res_mask & (1 << i))
559                         macio_release_resource(dev, i);
560         }
561 }
562 
563 int macio_enable_devres(struct macio_dev *dev)
564 {
565         struct macio_devres *dr;
566 
567         dr = devres_find(&dev->ofdev.dev, maciom_release, NULL, NULL);
568         if (!dr) {
569                 dr = devres_alloc(maciom_release, sizeof(*dr), GFP_KERNEL);
570                 if (!dr)
571                         return -ENOMEM;
572         }
573         return devres_get(&dev->ofdev.dev, dr, NULL, NULL) != NULL;
574 }
575 
576 static struct macio_devres * find_macio_dr(struct macio_dev *dev)
577 {
578         return devres_find(&dev->ofdev.dev, maciom_release, NULL, NULL);
579 }
580 
581 /**
582  *      macio_request_resource - Request an MMIO resource
583  *      @dev: pointer to the device holding the resource
584  *      @resource_no: resource number to request
585  *      @name: resource name
586  *
587  *      Mark  memory region number @resource_no associated with MacIO
588  *      device @dev as being reserved by owner @name.  Do not access
589  *      any address inside the memory regions unless this call returns
590  *      successfully.
591  *
592  *      Returns 0 on success, or %EBUSY on error.  A warning
593  *      message is also printed on failure.
594  */
595 int macio_request_resource(struct macio_dev *dev, int resource_no,
596                            const char *name)
597 {
598         struct macio_devres *dr = find_macio_dr(dev);
599 
600         if (macio_resource_len(dev, resource_no) == 0)
601                 return 0;
602                 
603         if (!request_mem_region(macio_resource_start(dev, resource_no),
604                                 macio_resource_len(dev, resource_no),
605                                 name))
606                 goto err_out;
607 
608         if (dr && resource_no < 32)
609                 dr->res_mask |= 1 << resource_no;
610         
611         return 0;
612 
613 err_out:
614         printk (KERN_WARNING "MacIO: Unable to reserve resource #%d:%lx@%lx"
615                 " for device %s\n",
616                 resource_no,
617                 macio_resource_len(dev, resource_no),
618                 macio_resource_start(dev, resource_no),
619                 dev_name(&dev->ofdev.dev));
620         return -EBUSY;
621 }
622 
623 /**
624  * macio_release_resource - Release an MMIO resource
625  * @dev: pointer to the device holding the resource
626  * @resource_no: resource number to release
627  */
628 void macio_release_resource(struct macio_dev *dev, int resource_no)
629 {
630         struct macio_devres *dr = find_macio_dr(dev);
631 
632         if (macio_resource_len(dev, resource_no) == 0)
633                 return;
634         release_mem_region(macio_resource_start(dev, resource_no),
635                            macio_resource_len(dev, resource_no));
636         if (dr && resource_no < 32)
637                 dr->res_mask &= ~(1 << resource_no);
638 }
639 
640 /**
641  *      macio_request_resources - Reserve all memory resources
642  *      @dev: MacIO device whose resources are to be reserved
643  *      @name: Name to be associated with resource.
644  *
645  *      Mark all memory regions associated with MacIO device @dev as
646  *      being reserved by owner @name.  Do not access any address inside
647  *      the memory regions unless this call returns successfully.
648  *
649  *      Returns 0 on success, or %EBUSY on error.  A warning
650  *      message is also printed on failure.
651  */
652 int macio_request_resources(struct macio_dev *dev, const char *name)
653 {
654         int i;
655         
656         for (i = 0; i < dev->n_resources; i++)
657                 if (macio_request_resource(dev, i, name))
658                         goto err_out;
659         return 0;
660 
661 err_out:
662         while(--i >= 0)
663                 macio_release_resource(dev, i);
664                 
665         return -EBUSY;
666 }
667 
668 /**
669  *      macio_release_resources - Release reserved memory resources
670  *      @dev: MacIO device whose resources were previously reserved
671  */
672 
673 void macio_release_resources(struct macio_dev *dev)
674 {
675         int i;
676         
677         for (i = 0; i < dev->n_resources; i++)
678                 macio_release_resource(dev, i);
679 }
680 
681 
682 #ifdef CONFIG_PCI
683 
684 static int macio_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
685 {
686         struct device_node* np;
687         struct macio_chip* chip;
688         
689         if (ent->vendor != PCI_VENDOR_ID_APPLE)
690                 return -ENODEV;
691 
692         /* Note regarding refcounting: We assume pci_device_to_OF_node() is
693          * ported to new OF APIs and returns a node with refcount incremented.
694          */
695         np = pci_device_to_OF_node(pdev);
696         if (np == NULL)
697                 return -ENODEV;
698 
699         /* The above assumption is wrong !!!
700          * fix that here for now until I fix the arch code
701          */
702         of_node_get(np);
703 
704         /* We also assume that pmac_feature will have done a get() on nodes
705          * stored in the macio chips array
706          */
707         chip = macio_find(np, macio_unknown);
708         of_node_put(np);
709         if (chip == NULL)
710                 return -ENODEV;
711 
712         /* XXX Need locking ??? */
713         if (chip->lbus.pdev == NULL) {
714                 chip->lbus.pdev = pdev;
715                 chip->lbus.chip = chip;
716                 pci_set_drvdata(pdev, &chip->lbus);
717                 pci_set_master(pdev);
718         }
719 
720         printk(KERN_INFO "MacIO PCI driver attached to %s chipset\n",
721                 chip->name);
722 
723         /*
724          * HACK ALERT: The WallStreet PowerBook and some OHare based machines
725          * have 2 macio ASICs. I must probe the "main" one first or IDE
726          * ordering will be incorrect. So I put on "hold" the second one since
727          * it seem to appear first on PCI
728          */
729         if (chip->type == macio_gatwick || chip->type == macio_ohareII)
730                 if (macio_chips[0].lbus.pdev == NULL) {
731                         macio_on_hold = chip;
732                         return 0;
733                 }
734 
735         macio_pci_add_devices(chip);
736         if (macio_on_hold && macio_chips[0].lbus.pdev != NULL) {
737                 macio_pci_add_devices(macio_on_hold);
738                 macio_on_hold = NULL;
739         }
740 
741         return 0;
742 }
743 
744 static void macio_pci_remove(struct pci_dev* pdev)
745 {
746         panic("removing of macio-asic not supported !\n");
747 }
748 
749 /*
750  * MacIO is matched against any Apple ID, it's probe() function
751  * will then decide wether it applies or not
752  */
753 static const struct pci_device_id pci_ids[] = { {
754         .vendor         = PCI_VENDOR_ID_APPLE,
755         .device         = PCI_ANY_ID,
756         .subvendor      = PCI_ANY_ID,
757         .subdevice      = PCI_ANY_ID,
758 
759         }, { /* end: all zeroes */ }
760 };
761 MODULE_DEVICE_TABLE (pci, pci_ids);
762 
763 /* pci driver glue; this is a "new style" PCI driver module */
764 static struct pci_driver macio_pci_driver = {
765         .name           = (char *) "macio",
766         .id_table       = pci_ids,
767 
768         .probe          = macio_pci_probe,
769         .remove         = macio_pci_remove,
770 };
771 
772 #endif /* CONFIG_PCI */
773 
774 static int __init macio_module_init (void) 
775 {
776 #ifdef CONFIG_PCI
777         int rc;
778 
779         rc = pci_register_driver(&macio_pci_driver);
780         if (rc)
781                 return rc;
782 #endif /* CONFIG_PCI */
783         return 0;
784 }
785 
786 module_init(macio_module_init);
787 
788 EXPORT_SYMBOL(macio_register_driver);
789 EXPORT_SYMBOL(macio_unregister_driver);
790 EXPORT_SYMBOL(macio_dev_get);
791 EXPORT_SYMBOL(macio_dev_put);
792 EXPORT_SYMBOL(macio_request_resource);
793 EXPORT_SYMBOL(macio_release_resource);
794 EXPORT_SYMBOL(macio_request_resources);
795 EXPORT_SYMBOL(macio_release_resources);
796 EXPORT_SYMBOL(macio_enable_devres);
797 
798 

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