1 /*
2 * IBM PowerPC IBM eBus Infrastructure Support.
3 *
4 * Copyright (c) 2005 IBM Corporation
5 * Joachim Fenkes <fenkes@de.ibm.com>
6 * Heiko J Schick <schickhj@de.ibm.com>
7 *
8 * All rights reserved.
9 *
10 * This source code is distributed under a dual license of GPL v2.0 and OpenIB
11 * BSD.
12 *
13 * OpenIB BSD License
14 *
15 * Redistribution and use in source and binary forms, with or without
16 * modification, are permitted provided that the following conditions are met:
17 *
18 * Redistributions of source code must retain the above copyright notice, this
19 * list of conditions and the following disclaimer.
20 *
21 * Redistributions in binary form must reproduce the above copyright notice,
22 * this list of conditions and the following disclaimer in the documentation
23 * and/or other materials
24 * provided with the distribution.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
27 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
30 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
33 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
34 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36 * POSSIBILITY OF SUCH DAMAGE.
37 */
38
39 #include <linux/init.h>
40 #include <linux/export.h>
41 #include <linux/console.h>
42 #include <linux/kobject.h>
43 #include <linux/dma-mapping.h>
44 #include <linux/interrupt.h>
45 #include <linux/of.h>
46 #include <linux/slab.h>
47 #include <linux/stat.h>
48 #include <linux/of_platform.h>
49 #include <asm/ibmebus.h>
50
51 static struct device ibmebus_bus_device = { /* fake "parent" device */
52 .init_name = "ibmebus",
53 };
54
55 struct bus_type ibmebus_bus_type;
56
57 /* These devices will automatically be added to the bus during init */
58 static const struct of_device_id ibmebus_matches[] __initconst = {
59 { .compatible = "IBM,lhca" },
60 { .compatible = "IBM,lhea" },
61 {},
62 };
63
ibmebus_alloc_coherent(struct device * dev,size_t size,dma_addr_t * dma_handle,gfp_t flag,struct dma_attrs * attrs)64 static void *ibmebus_alloc_coherent(struct device *dev,
65 size_t size,
66 dma_addr_t *dma_handle,
67 gfp_t flag,
68 struct dma_attrs *attrs)
69 {
70 void *mem;
71
72 mem = kmalloc(size, flag);
73 *dma_handle = (dma_addr_t)mem;
74
75 return mem;
76 }
77
ibmebus_free_coherent(struct device * dev,size_t size,void * vaddr,dma_addr_t dma_handle,struct dma_attrs * attrs)78 static void ibmebus_free_coherent(struct device *dev,
79 size_t size, void *vaddr,
80 dma_addr_t dma_handle,
81 struct dma_attrs *attrs)
82 {
83 kfree(vaddr);
84 }
85
ibmebus_map_page(struct device * dev,struct page * page,unsigned long offset,size_t size,enum dma_data_direction direction,struct dma_attrs * attrs)86 static dma_addr_t ibmebus_map_page(struct device *dev,
87 struct page *page,
88 unsigned long offset,
89 size_t size,
90 enum dma_data_direction direction,
91 struct dma_attrs *attrs)
92 {
93 return (dma_addr_t)(page_address(page) + offset);
94 }
95
ibmebus_unmap_page(struct device * dev,dma_addr_t dma_addr,size_t size,enum dma_data_direction direction,struct dma_attrs * attrs)96 static void ibmebus_unmap_page(struct device *dev,
97 dma_addr_t dma_addr,
98 size_t size,
99 enum dma_data_direction direction,
100 struct dma_attrs *attrs)
101 {
102 return;
103 }
104
ibmebus_map_sg(struct device * dev,struct scatterlist * sgl,int nents,enum dma_data_direction direction,struct dma_attrs * attrs)105 static int ibmebus_map_sg(struct device *dev,
106 struct scatterlist *sgl,
107 int nents, enum dma_data_direction direction,
108 struct dma_attrs *attrs)
109 {
110 struct scatterlist *sg;
111 int i;
112
113 for_each_sg(sgl, sg, nents, i) {
114 sg->dma_address = (dma_addr_t) sg_virt(sg);
115 sg->dma_length = sg->length;
116 }
117
118 return nents;
119 }
120
ibmebus_unmap_sg(struct device * dev,struct scatterlist * sg,int nents,enum dma_data_direction direction,struct dma_attrs * attrs)121 static void ibmebus_unmap_sg(struct device *dev,
122 struct scatterlist *sg,
123 int nents, enum dma_data_direction direction,
124 struct dma_attrs *attrs)
125 {
126 return;
127 }
128
ibmebus_dma_supported(struct device * dev,u64 mask)129 static int ibmebus_dma_supported(struct device *dev, u64 mask)
130 {
131 return mask == DMA_BIT_MASK(64);
132 }
133
ibmebus_dma_get_required_mask(struct device * dev)134 static u64 ibmebus_dma_get_required_mask(struct device *dev)
135 {
136 return DMA_BIT_MASK(64);
137 }
138
139 static struct dma_map_ops ibmebus_dma_ops = {
140 .alloc = ibmebus_alloc_coherent,
141 .free = ibmebus_free_coherent,
142 .map_sg = ibmebus_map_sg,
143 .unmap_sg = ibmebus_unmap_sg,
144 .dma_supported = ibmebus_dma_supported,
145 .get_required_mask = ibmebus_dma_get_required_mask,
146 .map_page = ibmebus_map_page,
147 .unmap_page = ibmebus_unmap_page,
148 };
149
ibmebus_match_path(struct device * dev,void * data)150 static int ibmebus_match_path(struct device *dev, void *data)
151 {
152 struct device_node *dn = to_platform_device(dev)->dev.of_node;
153 return (dn->full_name &&
154 (strcasecmp((char *)data, dn->full_name) == 0));
155 }
156
ibmebus_match_node(struct device * dev,void * data)157 static int ibmebus_match_node(struct device *dev, void *data)
158 {
159 return to_platform_device(dev)->dev.of_node == data;
160 }
161
ibmebus_create_device(struct device_node * dn)162 static int ibmebus_create_device(struct device_node *dn)
163 {
164 struct platform_device *dev;
165 int ret;
166
167 dev = of_device_alloc(dn, NULL, &ibmebus_bus_device);
168 if (!dev)
169 return -ENOMEM;
170
171 dev->dev.bus = &ibmebus_bus_type;
172 dev->dev.archdata.dma_ops = &ibmebus_dma_ops;
173
174 ret = of_device_add(dev);
175 if (ret)
176 platform_device_put(dev);
177 return ret;
178 }
179
ibmebus_create_devices(const struct of_device_id * matches)180 static int ibmebus_create_devices(const struct of_device_id *matches)
181 {
182 struct device_node *root, *child;
183 struct device *dev;
184 int ret = 0;
185
186 root = of_find_node_by_path("/");
187
188 for_each_child_of_node(root, child) {
189 if (!of_match_node(matches, child))
190 continue;
191
192 dev = bus_find_device(&ibmebus_bus_type, NULL, child,
193 ibmebus_match_node);
194 if (dev) {
195 put_device(dev);
196 continue;
197 }
198
199 ret = ibmebus_create_device(child);
200 if (ret) {
201 printk(KERN_ERR "%s: failed to create device (%i)",
202 __func__, ret);
203 of_node_put(child);
204 break;
205 }
206 }
207
208 of_node_put(root);
209 return ret;
210 }
211
ibmebus_register_driver(struct platform_driver * drv)212 int ibmebus_register_driver(struct platform_driver *drv)
213 {
214 /* If the driver uses devices that ibmebus doesn't know, add them */
215 ibmebus_create_devices(drv->driver.of_match_table);
216
217 drv->driver.bus = &ibmebus_bus_type;
218 return driver_register(&drv->driver);
219 }
220 EXPORT_SYMBOL(ibmebus_register_driver);
221
ibmebus_unregister_driver(struct platform_driver * drv)222 void ibmebus_unregister_driver(struct platform_driver *drv)
223 {
224 driver_unregister(&drv->driver);
225 }
226 EXPORT_SYMBOL(ibmebus_unregister_driver);
227
ibmebus_request_irq(u32 ist,irq_handler_t handler,unsigned long irq_flags,const char * devname,void * dev_id)228 int ibmebus_request_irq(u32 ist, irq_handler_t handler,
229 unsigned long irq_flags, const char *devname,
230 void *dev_id)
231 {
232 unsigned int irq = irq_create_mapping(NULL, ist);
233
234 if (irq == NO_IRQ)
235 return -EINVAL;
236
237 return request_irq(irq, handler, irq_flags, devname, dev_id);
238 }
239 EXPORT_SYMBOL(ibmebus_request_irq);
240
ibmebus_free_irq(u32 ist,void * dev_id)241 void ibmebus_free_irq(u32 ist, void *dev_id)
242 {
243 unsigned int irq = irq_find_mapping(NULL, ist);
244
245 free_irq(irq, dev_id);
246 irq_dispose_mapping(irq);
247 }
248 EXPORT_SYMBOL(ibmebus_free_irq);
249
ibmebus_chomp(const char * in,size_t count)250 static char *ibmebus_chomp(const char *in, size_t count)
251 {
252 char *out = kmalloc(count + 1, GFP_KERNEL);
253
254 if (!out)
255 return NULL;
256
257 memcpy(out, in, count);
258 out[count] = '\0';
259 if (out[count - 1] == '\n')
260 out[count - 1] = '\0';
261
262 return out;
263 }
264
ibmebus_store_probe(struct bus_type * bus,const char * buf,size_t count)265 static ssize_t ibmebus_store_probe(struct bus_type *bus,
266 const char *buf, size_t count)
267 {
268 struct device_node *dn = NULL;
269 struct device *dev;
270 char *path;
271 ssize_t rc = 0;
272
273 path = ibmebus_chomp(buf, count);
274 if (!path)
275 return -ENOMEM;
276
277 dev = bus_find_device(&ibmebus_bus_type, NULL, path,
278 ibmebus_match_path);
279 if (dev) {
280 put_device(dev);
281 printk(KERN_WARNING "%s: %s has already been probed\n",
282 __func__, path);
283 rc = -EEXIST;
284 goto out;
285 }
286
287 if ((dn = of_find_node_by_path(path))) {
288 rc = ibmebus_create_device(dn);
289 of_node_put(dn);
290 } else {
291 printk(KERN_WARNING "%s: no such device node: %s\n",
292 __func__, path);
293 rc = -ENODEV;
294 }
295
296 out:
297 kfree(path);
298 if (rc)
299 return rc;
300 return count;
301 }
302 static BUS_ATTR(probe, S_IWUSR, NULL, ibmebus_store_probe);
303
ibmebus_store_remove(struct bus_type * bus,const char * buf,size_t count)304 static ssize_t ibmebus_store_remove(struct bus_type *bus,
305 const char *buf, size_t count)
306 {
307 struct device *dev;
308 char *path;
309
310 path = ibmebus_chomp(buf, count);
311 if (!path)
312 return -ENOMEM;
313
314 if ((dev = bus_find_device(&ibmebus_bus_type, NULL, path,
315 ibmebus_match_path))) {
316 of_device_unregister(to_platform_device(dev));
317 put_device(dev);
318
319 kfree(path);
320 return count;
321 } else {
322 printk(KERN_WARNING "%s: %s not on the bus\n",
323 __func__, path);
324
325 kfree(path);
326 return -ENODEV;
327 }
328 }
329 static BUS_ATTR(remove, S_IWUSR, NULL, ibmebus_store_remove);
330
331 static struct attribute *ibmbus_bus_attrs[] = {
332 &bus_attr_probe.attr,
333 &bus_attr_remove.attr,
334 NULL,
335 };
336 ATTRIBUTE_GROUPS(ibmbus_bus);
337
ibmebus_bus_bus_match(struct device * dev,struct device_driver * drv)338 static int ibmebus_bus_bus_match(struct device *dev, struct device_driver *drv)
339 {
340 const struct of_device_id *matches = drv->of_match_table;
341
342 if (!matches)
343 return 0;
344
345 return of_match_device(matches, dev) != NULL;
346 }
347
ibmebus_bus_device_probe(struct device * dev)348 static int ibmebus_bus_device_probe(struct device *dev)
349 {
350 int error = -ENODEV;
351 struct platform_driver *drv;
352 struct platform_device *of_dev;
353
354 drv = to_platform_driver(dev->driver);
355 of_dev = to_platform_device(dev);
356
357 if (!drv->probe)
358 return error;
359
360 of_dev_get(of_dev);
361
362 if (of_driver_match_device(dev, dev->driver))
363 error = drv->probe(of_dev);
364 if (error)
365 of_dev_put(of_dev);
366
367 return error;
368 }
369
ibmebus_bus_device_remove(struct device * dev)370 static int ibmebus_bus_device_remove(struct device *dev)
371 {
372 struct platform_device *of_dev = to_platform_device(dev);
373 struct platform_driver *drv = to_platform_driver(dev->driver);
374
375 if (dev->driver && drv->remove)
376 drv->remove(of_dev);
377 return 0;
378 }
379
ibmebus_bus_device_shutdown(struct device * dev)380 static void ibmebus_bus_device_shutdown(struct device *dev)
381 {
382 struct platform_device *of_dev = to_platform_device(dev);
383 struct platform_driver *drv = to_platform_driver(dev->driver);
384
385 if (dev->driver && drv->shutdown)
386 drv->shutdown(of_dev);
387 }
388
389 /*
390 * ibmebus_bus_device_attrs
391 */
devspec_show(struct device * dev,struct device_attribute * attr,char * buf)392 static ssize_t devspec_show(struct device *dev,
393 struct device_attribute *attr, char *buf)
394 {
395 struct platform_device *ofdev;
396
397 ofdev = to_platform_device(dev);
398 return sprintf(buf, "%s\n", ofdev->dev.of_node->full_name);
399 }
400
name_show(struct device * dev,struct device_attribute * attr,char * buf)401 static ssize_t name_show(struct device *dev,
402 struct device_attribute *attr, char *buf)
403 {
404 struct platform_device *ofdev;
405
406 ofdev = to_platform_device(dev);
407 return sprintf(buf, "%s\n", ofdev->dev.of_node->name);
408 }
409
modalias_show(struct device * dev,struct device_attribute * attr,char * buf)410 static ssize_t modalias_show(struct device *dev,
411 struct device_attribute *attr, char *buf)
412 {
413 ssize_t len = of_device_get_modalias(dev, buf, PAGE_SIZE - 2);
414 buf[len] = '\n';
415 buf[len+1] = 0;
416 return len+1;
417 }
418
419 struct device_attribute ibmebus_bus_device_attrs[] = {
420 __ATTR_RO(devspec),
421 __ATTR_RO(name),
422 __ATTR_RO(modalias),
423 __ATTR_NULL
424 };
425
426 #ifdef CONFIG_PM_SLEEP
ibmebus_bus_legacy_suspend(struct device * dev,pm_message_t mesg)427 static int ibmebus_bus_legacy_suspend(struct device *dev, pm_message_t mesg)
428 {
429 struct platform_device *of_dev = to_platform_device(dev);
430 struct platform_driver *drv = to_platform_driver(dev->driver);
431 int ret = 0;
432
433 if (dev->driver && drv->suspend)
434 ret = drv->suspend(of_dev, mesg);
435 return ret;
436 }
437
ibmebus_bus_legacy_resume(struct device * dev)438 static int ibmebus_bus_legacy_resume(struct device *dev)
439 {
440 struct platform_device *of_dev = to_platform_device(dev);
441 struct platform_driver *drv = to_platform_driver(dev->driver);
442 int ret = 0;
443
444 if (dev->driver && drv->resume)
445 ret = drv->resume(of_dev);
446 return ret;
447 }
448
ibmebus_bus_pm_prepare(struct device * dev)449 static int ibmebus_bus_pm_prepare(struct device *dev)
450 {
451 struct device_driver *drv = dev->driver;
452 int ret = 0;
453
454 if (drv && drv->pm && drv->pm->prepare)
455 ret = drv->pm->prepare(dev);
456
457 return ret;
458 }
459
ibmebus_bus_pm_complete(struct device * dev)460 static void ibmebus_bus_pm_complete(struct device *dev)
461 {
462 struct device_driver *drv = dev->driver;
463
464 if (drv && drv->pm && drv->pm->complete)
465 drv->pm->complete(dev);
466 }
467
468 #ifdef CONFIG_SUSPEND
469
ibmebus_bus_pm_suspend(struct device * dev)470 static int ibmebus_bus_pm_suspend(struct device *dev)
471 {
472 struct device_driver *drv = dev->driver;
473 int ret = 0;
474
475 if (!drv)
476 return 0;
477
478 if (drv->pm) {
479 if (drv->pm->suspend)
480 ret = drv->pm->suspend(dev);
481 } else {
482 ret = ibmebus_bus_legacy_suspend(dev, PMSG_SUSPEND);
483 }
484
485 return ret;
486 }
487
ibmebus_bus_pm_suspend_noirq(struct device * dev)488 static int ibmebus_bus_pm_suspend_noirq(struct device *dev)
489 {
490 struct device_driver *drv = dev->driver;
491 int ret = 0;
492
493 if (!drv)
494 return 0;
495
496 if (drv->pm) {
497 if (drv->pm->suspend_noirq)
498 ret = drv->pm->suspend_noirq(dev);
499 }
500
501 return ret;
502 }
503
ibmebus_bus_pm_resume(struct device * dev)504 static int ibmebus_bus_pm_resume(struct device *dev)
505 {
506 struct device_driver *drv = dev->driver;
507 int ret = 0;
508
509 if (!drv)
510 return 0;
511
512 if (drv->pm) {
513 if (drv->pm->resume)
514 ret = drv->pm->resume(dev);
515 } else {
516 ret = ibmebus_bus_legacy_resume(dev);
517 }
518
519 return ret;
520 }
521
ibmebus_bus_pm_resume_noirq(struct device * dev)522 static int ibmebus_bus_pm_resume_noirq(struct device *dev)
523 {
524 struct device_driver *drv = dev->driver;
525 int ret = 0;
526
527 if (!drv)
528 return 0;
529
530 if (drv->pm) {
531 if (drv->pm->resume_noirq)
532 ret = drv->pm->resume_noirq(dev);
533 }
534
535 return ret;
536 }
537
538 #else /* !CONFIG_SUSPEND */
539
540 #define ibmebus_bus_pm_suspend NULL
541 #define ibmebus_bus_pm_resume NULL
542 #define ibmebus_bus_pm_suspend_noirq NULL
543 #define ibmebus_bus_pm_resume_noirq NULL
544
545 #endif /* !CONFIG_SUSPEND */
546
547 #ifdef CONFIG_HIBERNATE_CALLBACKS
548
ibmebus_bus_pm_freeze(struct device * dev)549 static int ibmebus_bus_pm_freeze(struct device *dev)
550 {
551 struct device_driver *drv = dev->driver;
552 int ret = 0;
553
554 if (!drv)
555 return 0;
556
557 if (drv->pm) {
558 if (drv->pm->freeze)
559 ret = drv->pm->freeze(dev);
560 } else {
561 ret = ibmebus_bus_legacy_suspend(dev, PMSG_FREEZE);
562 }
563
564 return ret;
565 }
566
ibmebus_bus_pm_freeze_noirq(struct device * dev)567 static int ibmebus_bus_pm_freeze_noirq(struct device *dev)
568 {
569 struct device_driver *drv = dev->driver;
570 int ret = 0;
571
572 if (!drv)
573 return 0;
574
575 if (drv->pm) {
576 if (drv->pm->freeze_noirq)
577 ret = drv->pm->freeze_noirq(dev);
578 }
579
580 return ret;
581 }
582
ibmebus_bus_pm_thaw(struct device * dev)583 static int ibmebus_bus_pm_thaw(struct device *dev)
584 {
585 struct device_driver *drv = dev->driver;
586 int ret = 0;
587
588 if (!drv)
589 return 0;
590
591 if (drv->pm) {
592 if (drv->pm->thaw)
593 ret = drv->pm->thaw(dev);
594 } else {
595 ret = ibmebus_bus_legacy_resume(dev);
596 }
597
598 return ret;
599 }
600
ibmebus_bus_pm_thaw_noirq(struct device * dev)601 static int ibmebus_bus_pm_thaw_noirq(struct device *dev)
602 {
603 struct device_driver *drv = dev->driver;
604 int ret = 0;
605
606 if (!drv)
607 return 0;
608
609 if (drv->pm) {
610 if (drv->pm->thaw_noirq)
611 ret = drv->pm->thaw_noirq(dev);
612 }
613
614 return ret;
615 }
616
ibmebus_bus_pm_poweroff(struct device * dev)617 static int ibmebus_bus_pm_poweroff(struct device *dev)
618 {
619 struct device_driver *drv = dev->driver;
620 int ret = 0;
621
622 if (!drv)
623 return 0;
624
625 if (drv->pm) {
626 if (drv->pm->poweroff)
627 ret = drv->pm->poweroff(dev);
628 } else {
629 ret = ibmebus_bus_legacy_suspend(dev, PMSG_HIBERNATE);
630 }
631
632 return ret;
633 }
634
ibmebus_bus_pm_poweroff_noirq(struct device * dev)635 static int ibmebus_bus_pm_poweroff_noirq(struct device *dev)
636 {
637 struct device_driver *drv = dev->driver;
638 int ret = 0;
639
640 if (!drv)
641 return 0;
642
643 if (drv->pm) {
644 if (drv->pm->poweroff_noirq)
645 ret = drv->pm->poweroff_noirq(dev);
646 }
647
648 return ret;
649 }
650
ibmebus_bus_pm_restore(struct device * dev)651 static int ibmebus_bus_pm_restore(struct device *dev)
652 {
653 struct device_driver *drv = dev->driver;
654 int ret = 0;
655
656 if (!drv)
657 return 0;
658
659 if (drv->pm) {
660 if (drv->pm->restore)
661 ret = drv->pm->restore(dev);
662 } else {
663 ret = ibmebus_bus_legacy_resume(dev);
664 }
665
666 return ret;
667 }
668
ibmebus_bus_pm_restore_noirq(struct device * dev)669 static int ibmebus_bus_pm_restore_noirq(struct device *dev)
670 {
671 struct device_driver *drv = dev->driver;
672 int ret = 0;
673
674 if (!drv)
675 return 0;
676
677 if (drv->pm) {
678 if (drv->pm->restore_noirq)
679 ret = drv->pm->restore_noirq(dev);
680 }
681
682 return ret;
683 }
684
685 #else /* !CONFIG_HIBERNATE_CALLBACKS */
686
687 #define ibmebus_bus_pm_freeze NULL
688 #define ibmebus_bus_pm_thaw NULL
689 #define ibmebus_bus_pm_poweroff NULL
690 #define ibmebus_bus_pm_restore NULL
691 #define ibmebus_bus_pm_freeze_noirq NULL
692 #define ibmebus_bus_pm_thaw_noirq NULL
693 #define ibmebus_bus_pm_poweroff_noirq NULL
694 #define ibmebus_bus_pm_restore_noirq NULL
695
696 #endif /* !CONFIG_HIBERNATE_CALLBACKS */
697
698 static struct dev_pm_ops ibmebus_bus_dev_pm_ops = {
699 .prepare = ibmebus_bus_pm_prepare,
700 .complete = ibmebus_bus_pm_complete,
701 .suspend = ibmebus_bus_pm_suspend,
702 .resume = ibmebus_bus_pm_resume,
703 .freeze = ibmebus_bus_pm_freeze,
704 .thaw = ibmebus_bus_pm_thaw,
705 .poweroff = ibmebus_bus_pm_poweroff,
706 .restore = ibmebus_bus_pm_restore,
707 .suspend_noirq = ibmebus_bus_pm_suspend_noirq,
708 .resume_noirq = ibmebus_bus_pm_resume_noirq,
709 .freeze_noirq = ibmebus_bus_pm_freeze_noirq,
710 .thaw_noirq = ibmebus_bus_pm_thaw_noirq,
711 .poweroff_noirq = ibmebus_bus_pm_poweroff_noirq,
712 .restore_noirq = ibmebus_bus_pm_restore_noirq,
713 };
714
715 #define IBMEBUS_BUS_PM_OPS_PTR (&ibmebus_bus_dev_pm_ops)
716
717 #else /* !CONFIG_PM_SLEEP */
718
719 #define IBMEBUS_BUS_PM_OPS_PTR NULL
720
721 #endif /* !CONFIG_PM_SLEEP */
722
723 struct bus_type ibmebus_bus_type = {
724 .name = "ibmebus",
725 .uevent = of_device_uevent_modalias,
726 .bus_groups = ibmbus_bus_groups,
727 .match = ibmebus_bus_bus_match,
728 .probe = ibmebus_bus_device_probe,
729 .remove = ibmebus_bus_device_remove,
730 .shutdown = ibmebus_bus_device_shutdown,
731 .dev_attrs = ibmebus_bus_device_attrs,
732 .pm = IBMEBUS_BUS_PM_OPS_PTR,
733 };
734 EXPORT_SYMBOL(ibmebus_bus_type);
735
ibmebus_bus_init(void)736 static int __init ibmebus_bus_init(void)
737 {
738 int err;
739
740 printk(KERN_INFO "IBM eBus Device Driver\n");
741
742 err = bus_register(&ibmebus_bus_type);
743 if (err) {
744 printk(KERN_ERR "%s: failed to register IBM eBus.\n",
745 __func__);
746 return err;
747 }
748
749 err = device_register(&ibmebus_bus_device);
750 if (err) {
751 printk(KERN_WARNING "%s: device_register returned %i\n",
752 __func__, err);
753 bus_unregister(&ibmebus_bus_type);
754
755 return err;
756 }
757
758 err = ibmebus_create_devices(ibmebus_matches);
759 if (err) {
760 device_unregister(&ibmebus_bus_device);
761 bus_unregister(&ibmebus_bus_type);
762 return err;
763 }
764
765 return 0;
766 }
767 postcore_initcall(ibmebus_bus_init);
768