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d7a30103 HS |
1 | /* |
2 | * IBM PowerPC IBM eBus Infrastructure Support. | |
3 | * | |
4 | * Copyright (c) 2005 IBM Corporation | |
6bccf755 | 5 | * Joachim Fenkes <fenkes@de.ibm.com> |
d7a30103 | 6 | * Heiko J Schick <schickhj@de.ibm.com> |
a8308800 | 7 | * |
d7a30103 HS |
8 | * All rights reserved. |
9 | * | |
a8308800 JF |
10 | * This source code is distributed under a dual license of GPL v2.0 and OpenIB |
11 | * BSD. | |
d7a30103 HS |
12 | * |
13 | * OpenIB BSD License | |
14 | * | |
a8308800 JF |
15 | * Redistribution and use in source and binary forms, with or without |
16 | * modification, are permitted provided that the following conditions are met: | |
d7a30103 | 17 | * |
a8308800 JF |
18 | * Redistributions of source code must retain the above copyright notice, this |
19 | * list of conditions and the following disclaimer. | |
d7a30103 | 20 | * |
a8308800 JF |
21 | * Redistributions in binary form must reproduce the above copyright notice, |
22 | * this list of conditions and the following disclaimer in the documentation | |
d7a30103 | 23 | * and/or other materials |
a8308800 | 24 | * provided with the distribution. |
d7a30103 | 25 | * |
a8308800 JF |
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 | |
d7a30103 HS |
32 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
33 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER | |
a8308800 JF |
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 | |
d7a30103 HS |
36 | * POSSIBILITY OF SUCH DAMAGE. |
37 | */ | |
38 | ||
39 | #include <linux/init.h> | |
66b15db6 | 40 | #include <linux/export.h> |
d7a30103 HS |
41 | #include <linux/console.h> |
42 | #include <linux/kobject.h> | |
43 | #include <linux/dma-mapping.h> | |
44 | #include <linux/interrupt.h> | |
283029d1 | 45 | #include <linux/of.h> |
5a0e3ad6 | 46 | #include <linux/slab.h> |
b56eade5 | 47 | #include <linux/stat.h> |
a988c0a6 | 48 | #include <linux/of_platform.h> |
d7a30103 HS |
49 | #include <asm/ibmebus.h> |
50 | #include <asm/abs_addr.h> | |
51 | ||
6bccf755 | 52 | static struct device ibmebus_bus_device = { /* fake "parent" device */ |
aab0d375 | 53 | .init_name = "ibmebus", |
d7a30103 HS |
54 | }; |
55 | ||
6bccf755 JF |
56 | struct bus_type ibmebus_bus_type; |
57 | ||
55347cc9 | 58 | /* These devices will automatically be added to the bus during init */ |
1b17adf1 | 59 | static struct of_device_id __initdata ibmebus_matches[] = { |
55347cc9 JF |
60 | { .compatible = "IBM,lhca" }, |
61 | { .compatible = "IBM,lhea" }, | |
62 | {}, | |
63 | }; | |
64 | ||
d7a30103 HS |
65 | static void *ibmebus_alloc_coherent(struct device *dev, |
66 | size_t size, | |
67 | dma_addr_t *dma_handle, | |
68 | gfp_t flag) | |
69 | { | |
70 | void *mem; | |
a8308800 | 71 | |
d7a30103 HS |
72 | mem = kmalloc(size, flag); |
73 | *dma_handle = (dma_addr_t)mem; | |
74 | ||
75 | return mem; | |
76 | } | |
77 | ||
78 | static void ibmebus_free_coherent(struct device *dev, | |
a8308800 | 79 | size_t size, void *vaddr, |
d7a30103 HS |
80 | dma_addr_t dma_handle) |
81 | { | |
82 | kfree(vaddr); | |
83 | } | |
84 | ||
f9226d57 MN |
85 | static dma_addr_t ibmebus_map_page(struct device *dev, |
86 | struct page *page, | |
87 | unsigned long offset, | |
88 | size_t size, | |
89 | enum dma_data_direction direction, | |
90 | struct dma_attrs *attrs) | |
d7a30103 | 91 | { |
f9226d57 | 92 | return (dma_addr_t)(page_address(page) + offset); |
d7a30103 HS |
93 | } |
94 | ||
f9226d57 MN |
95 | static void ibmebus_unmap_page(struct device *dev, |
96 | dma_addr_t dma_addr, | |
97 | size_t size, | |
98 | enum dma_data_direction direction, | |
99 | struct dma_attrs *attrs) | |
d7a30103 HS |
100 | { |
101 | return; | |
102 | } | |
103 | ||
104 | static int ibmebus_map_sg(struct device *dev, | |
78bdc310 | 105 | struct scatterlist *sgl, |
3affedc4 MN |
106 | int nents, enum dma_data_direction direction, |
107 | struct dma_attrs *attrs) | |
d7a30103 | 108 | { |
78bdc310 | 109 | struct scatterlist *sg; |
d7a30103 | 110 | int i; |
a8308800 | 111 | |
78bdc310 | 112 | for_each_sg(sgl, sg, nents, i) { |
58b053e4 | 113 | sg->dma_address = (dma_addr_t) sg_virt(sg); |
78bdc310 | 114 | sg->dma_length = sg->length; |
d7a30103 | 115 | } |
a8308800 | 116 | |
d7a30103 HS |
117 | return nents; |
118 | } | |
119 | ||
120 | static void ibmebus_unmap_sg(struct device *dev, | |
121 | struct scatterlist *sg, | |
3affedc4 MN |
122 | int nents, enum dma_data_direction direction, |
123 | struct dma_attrs *attrs) | |
d7a30103 HS |
124 | { |
125 | return; | |
126 | } | |
127 | ||
128 | static int ibmebus_dma_supported(struct device *dev, u64 mask) | |
129 | { | |
d24f9c69 MM |
130 | return mask == DMA_BIT_MASK(64); |
131 | } | |
132 | ||
133 | static u64 ibmebus_dma_get_required_mask(struct device *dev) | |
134 | { | |
135 | return DMA_BIT_MASK(64); | |
d7a30103 HS |
136 | } |
137 | ||
45223c54 | 138 | static struct dma_map_ops ibmebus_dma_ops = { |
2eccacd0 MM |
139 | .alloc_coherent = ibmebus_alloc_coherent, |
140 | .free_coherent = ibmebus_free_coherent, | |
141 | .map_sg = ibmebus_map_sg, | |
142 | .unmap_sg = ibmebus_unmap_sg, | |
143 | .dma_supported = ibmebus_dma_supported, | |
d24f9c69 | 144 | .get_required_mask = ibmebus_dma_get_required_mask, |
2eccacd0 MM |
145 | .map_page = ibmebus_map_page, |
146 | .unmap_page = ibmebus_unmap_page, | |
d7a30103 HS |
147 | }; |
148 | ||
55347cc9 JF |
149 | static int ibmebus_match_path(struct device *dev, void *data) |
150 | { | |
a454dc50 | 151 | struct device_node *dn = to_platform_device(dev)->dev.of_node; |
55347cc9 JF |
152 | return (dn->full_name && |
153 | (strcasecmp((char *)data, dn->full_name) == 0)); | |
154 | } | |
155 | ||
156 | static int ibmebus_match_node(struct device *dev, void *data) | |
157 | { | |
a454dc50 | 158 | return to_platform_device(dev)->dev.of_node == data; |
55347cc9 JF |
159 | } |
160 | ||
161 | static int ibmebus_create_device(struct device_node *dn) | |
162 | { | |
a454dc50 | 163 | struct platform_device *dev; |
55347cc9 JF |
164 | int ret; |
165 | ||
166 | dev = of_device_alloc(dn, NULL, &ibmebus_bus_device); | |
167 | if (!dev) | |
168 | return -ENOMEM; | |
169 | ||
170 | dev->dev.bus = &ibmebus_bus_type; | |
171 | dev->dev.archdata.dma_ops = &ibmebus_dma_ops; | |
172 | ||
7096d042 GL |
173 | ret = of_device_add(dev); |
174 | if (ret) | |
175 | platform_device_put(dev); | |
176 | return ret; | |
55347cc9 JF |
177 | } |
178 | ||
179 | static int ibmebus_create_devices(const struct of_device_id *matches) | |
180 | { | |
181 | struct device_node *root, *child; | |
182 | int ret = 0; | |
183 | ||
184 | root = of_find_node_by_path("/"); | |
185 | ||
85e99b9f | 186 | for_each_child_of_node(root, child) { |
55347cc9 JF |
187 | if (!of_match_node(matches, child)) |
188 | continue; | |
189 | ||
190 | if (bus_find_device(&ibmebus_bus_type, NULL, child, | |
191 | ibmebus_match_node)) | |
192 | continue; | |
193 | ||
194 | ret = ibmebus_create_device(child); | |
195 | if (ret) { | |
196 | printk(KERN_ERR "%s: failed to create device (%i)", | |
e48b1b45 | 197 | __func__, ret); |
55347cc9 JF |
198 | of_node_put(child); |
199 | break; | |
200 | } | |
201 | } | |
202 | ||
203 | of_node_put(root); | |
204 | return ret; | |
205 | } | |
206 | ||
6b08f3ae | 207 | int ibmebus_register_driver(struct of_platform_driver *drv) |
d7a30103 | 208 | { |
6b08f3ae | 209 | /* If the driver uses devices that ibmebus doesn't know, add them */ |
597b9d1e | 210 | ibmebus_create_devices(drv->driver.of_match_table); |
6b08f3ae | 211 | |
710ac54b GL |
212 | drv->driver.bus = &ibmebus_bus_type; |
213 | return driver_register(&drv->driver); | |
d7a30103 HS |
214 | } |
215 | EXPORT_SYMBOL(ibmebus_register_driver); | |
216 | ||
6b08f3ae | 217 | void ibmebus_unregister_driver(struct of_platform_driver *drv) |
a8308800 | 218 | { |
710ac54b | 219 | driver_unregister(&drv->driver); |
d7a30103 HS |
220 | } |
221 | EXPORT_SYMBOL(ibmebus_unregister_driver); | |
222 | ||
6b08f3ae JF |
223 | int ibmebus_request_irq(u32 ist, irq_handler_t handler, |
224 | unsigned long irq_flags, const char *devname, | |
d7a30103 HS |
225 | void *dev_id) |
226 | { | |
6e99e458 | 227 | unsigned int irq = irq_create_mapping(NULL, ist); |
a8308800 | 228 | |
d7a30103 HS |
229 | if (irq == NO_IRQ) |
230 | return -EINVAL; | |
a8308800 | 231 | |
6b08f3ae | 232 | return request_irq(irq, handler, irq_flags, devname, dev_id); |
d7a30103 HS |
233 | } |
234 | EXPORT_SYMBOL(ibmebus_request_irq); | |
235 | ||
6b08f3ae | 236 | void ibmebus_free_irq(u32 ist, void *dev_id) |
d7a30103 | 237 | { |
0ebfff14 | 238 | unsigned int irq = irq_find_mapping(NULL, ist); |
a8308800 | 239 | |
d7a30103 | 240 | free_irq(irq, dev_id); |
6358d6cb | 241 | irq_dispose_mapping(irq); |
d7a30103 HS |
242 | } |
243 | EXPORT_SYMBOL(ibmebus_free_irq); | |
244 | ||
0727702a JF |
245 | static char *ibmebus_chomp(const char *in, size_t count) |
246 | { | |
61a564fd JJ |
247 | char *out = kmalloc(count + 1, GFP_KERNEL); |
248 | ||
0727702a JF |
249 | if (!out) |
250 | return NULL; | |
251 | ||
252 | memcpy(out, in, count); | |
253 | out[count] = '\0'; | |
254 | if (out[count - 1] == '\n') | |
255 | out[count - 1] = '\0'; | |
256 | ||
257 | return out; | |
6bccf755 JF |
258 | } |
259 | ||
260 | static ssize_t ibmebus_store_probe(struct bus_type *bus, | |
261 | const char *buf, size_t count) | |
262 | { | |
263 | struct device_node *dn = NULL; | |
0727702a | 264 | char *path; |
55347cc9 | 265 | ssize_t rc = 0; |
0727702a JF |
266 | |
267 | path = ibmebus_chomp(buf, count); | |
268 | if (!path) | |
269 | return -ENOMEM; | |
270 | ||
271 | if (bus_find_device(&ibmebus_bus_type, NULL, path, | |
74c9b99d | 272 | ibmebus_match_path)) { |
0727702a | 273 | printk(KERN_WARNING "%s: %s has already been probed\n", |
e48b1b45 | 274 | __func__, path); |
74c9b99d | 275 | rc = -EEXIST; |
0727702a | 276 | goto out; |
6bccf755 JF |
277 | } |
278 | ||
0727702a | 279 | if ((dn = of_find_node_by_path(path))) { |
55347cc9 | 280 | rc = ibmebus_create_device(dn); |
0727702a | 281 | of_node_put(dn); |
0727702a JF |
282 | } else { |
283 | printk(KERN_WARNING "%s: no such device node: %s\n", | |
e48b1b45 | 284 | __func__, path); |
0727702a | 285 | rc = -ENODEV; |
6bccf755 JF |
286 | } |
287 | ||
0727702a JF |
288 | out: |
289 | kfree(path); | |
55347cc9 JF |
290 | if (rc) |
291 | return rc; | |
292 | return count; | |
6bccf755 JF |
293 | } |
294 | ||
295 | static ssize_t ibmebus_store_remove(struct bus_type *bus, | |
296 | const char *buf, size_t count) | |
297 | { | |
298 | struct device *dev; | |
0727702a | 299 | char *path; |
6bccf755 | 300 | |
0727702a JF |
301 | path = ibmebus_chomp(buf, count); |
302 | if (!path) | |
303 | return -ENOMEM; | |
304 | ||
305 | if ((dev = bus_find_device(&ibmebus_bus_type, NULL, path, | |
306 | ibmebus_match_path))) { | |
a454dc50 | 307 | of_device_unregister(to_platform_device(dev)); |
0727702a JF |
308 | |
309 | kfree(path); | |
310 | return count; | |
6bccf755 | 311 | } else { |
0727702a | 312 | printk(KERN_WARNING "%s: %s not on the bus\n", |
e48b1b45 | 313 | __func__, path); |
0727702a JF |
314 | |
315 | kfree(path); | |
6bccf755 JF |
316 | return -ENODEV; |
317 | } | |
6bccf755 JF |
318 | } |
319 | ||
710ac54b | 320 | |
6bccf755 JF |
321 | static struct bus_attribute ibmebus_bus_attrs[] = { |
322 | __ATTR(probe, S_IWUSR, NULL, ibmebus_store_probe), | |
323 | __ATTR(remove, S_IWUSR, NULL, ibmebus_store_remove), | |
324 | __ATTR_NULL | |
325 | }; | |
326 | ||
710ac54b GL |
327 | static int ibmebus_bus_bus_match(struct device *dev, struct device_driver *drv) |
328 | { | |
329 | const struct of_device_id *matches = drv->of_match_table; | |
330 | ||
331 | if (!matches) | |
332 | return 0; | |
333 | ||
334 | return of_match_device(matches, dev) != NULL; | |
335 | } | |
336 | ||
337 | static int ibmebus_bus_device_probe(struct device *dev) | |
338 | { | |
339 | int error = -ENODEV; | |
340 | struct of_platform_driver *drv; | |
341 | struct platform_device *of_dev; | |
342 | const struct of_device_id *match; | |
343 | ||
344 | drv = to_of_platform_driver(dev->driver); | |
345 | of_dev = to_platform_device(dev); | |
346 | ||
347 | if (!drv->probe) | |
348 | return error; | |
349 | ||
350 | of_dev_get(of_dev); | |
351 | ||
352 | match = of_match_device(drv->driver.of_match_table, dev); | |
353 | if (match) | |
354 | error = drv->probe(of_dev, match); | |
355 | if (error) | |
356 | of_dev_put(of_dev); | |
357 | ||
358 | return error; | |
359 | } | |
360 | ||
361 | static int ibmebus_bus_device_remove(struct device *dev) | |
362 | { | |
363 | struct platform_device *of_dev = to_platform_device(dev); | |
364 | struct of_platform_driver *drv = to_of_platform_driver(dev->driver); | |
365 | ||
366 | if (dev->driver && drv->remove) | |
367 | drv->remove(of_dev); | |
368 | return 0; | |
369 | } | |
370 | ||
371 | static void ibmebus_bus_device_shutdown(struct device *dev) | |
372 | { | |
373 | struct platform_device *of_dev = to_platform_device(dev); | |
374 | struct of_platform_driver *drv = to_of_platform_driver(dev->driver); | |
375 | ||
376 | if (dev->driver && drv->shutdown) | |
377 | drv->shutdown(of_dev); | |
378 | } | |
379 | ||
380 | /* | |
381 | * ibmebus_bus_device_attrs | |
382 | */ | |
383 | static ssize_t devspec_show(struct device *dev, | |
384 | struct device_attribute *attr, char *buf) | |
385 | { | |
386 | struct platform_device *ofdev; | |
387 | ||
388 | ofdev = to_platform_device(dev); | |
389 | return sprintf(buf, "%s\n", ofdev->dev.of_node->full_name); | |
390 | } | |
391 | ||
392 | static ssize_t name_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->name); | |
399 | } | |
400 | ||
401 | static ssize_t modalias_show(struct device *dev, | |
402 | struct device_attribute *attr, char *buf) | |
403 | { | |
404 | ssize_t len = of_device_get_modalias(dev, buf, PAGE_SIZE - 2); | |
405 | buf[len] = '\n'; | |
406 | buf[len+1] = 0; | |
407 | return len+1; | |
408 | } | |
409 | ||
410 | struct device_attribute ibmebus_bus_device_attrs[] = { | |
411 | __ATTR_RO(devspec), | |
412 | __ATTR_RO(name), | |
413 | __ATTR_RO(modalias), | |
414 | __ATTR_NULL | |
415 | }; | |
416 | ||
417 | #ifdef CONFIG_PM_SLEEP | |
418 | static int ibmebus_bus_legacy_suspend(struct device *dev, pm_message_t mesg) | |
419 | { | |
420 | struct platform_device *of_dev = to_platform_device(dev); | |
421 | struct of_platform_driver *drv = to_of_platform_driver(dev->driver); | |
422 | int ret = 0; | |
423 | ||
424 | if (dev->driver && drv->suspend) | |
425 | ret = drv->suspend(of_dev, mesg); | |
426 | return ret; | |
427 | } | |
428 | ||
429 | static int ibmebus_bus_legacy_resume(struct device *dev) | |
430 | { | |
431 | struct platform_device *of_dev = to_platform_device(dev); | |
432 | struct of_platform_driver *drv = to_of_platform_driver(dev->driver); | |
433 | int ret = 0; | |
434 | ||
435 | if (dev->driver && drv->resume) | |
436 | ret = drv->resume(of_dev); | |
437 | return ret; | |
438 | } | |
439 | ||
440 | static int ibmebus_bus_pm_prepare(struct device *dev) | |
441 | { | |
442 | struct device_driver *drv = dev->driver; | |
443 | int ret = 0; | |
444 | ||
445 | if (drv && drv->pm && drv->pm->prepare) | |
446 | ret = drv->pm->prepare(dev); | |
447 | ||
448 | return ret; | |
449 | } | |
450 | ||
451 | static void ibmebus_bus_pm_complete(struct device *dev) | |
452 | { | |
453 | struct device_driver *drv = dev->driver; | |
454 | ||
455 | if (drv && drv->pm && drv->pm->complete) | |
456 | drv->pm->complete(dev); | |
457 | } | |
458 | ||
459 | #ifdef CONFIG_SUSPEND | |
460 | ||
461 | static int ibmebus_bus_pm_suspend(struct device *dev) | |
462 | { | |
463 | struct device_driver *drv = dev->driver; | |
464 | int ret = 0; | |
465 | ||
466 | if (!drv) | |
467 | return 0; | |
468 | ||
469 | if (drv->pm) { | |
470 | if (drv->pm->suspend) | |
471 | ret = drv->pm->suspend(dev); | |
472 | } else { | |
473 | ret = ibmebus_bus_legacy_suspend(dev, PMSG_SUSPEND); | |
474 | } | |
475 | ||
476 | return ret; | |
477 | } | |
478 | ||
479 | static int ibmebus_bus_pm_suspend_noirq(struct device *dev) | |
480 | { | |
481 | struct device_driver *drv = dev->driver; | |
482 | int ret = 0; | |
483 | ||
484 | if (!drv) | |
485 | return 0; | |
486 | ||
487 | if (drv->pm) { | |
488 | if (drv->pm->suspend_noirq) | |
489 | ret = drv->pm->suspend_noirq(dev); | |
490 | } | |
491 | ||
492 | return ret; | |
493 | } | |
494 | ||
495 | static int ibmebus_bus_pm_resume(struct device *dev) | |
496 | { | |
497 | struct device_driver *drv = dev->driver; | |
498 | int ret = 0; | |
499 | ||
500 | if (!drv) | |
501 | return 0; | |
502 | ||
503 | if (drv->pm) { | |
504 | if (drv->pm->resume) | |
505 | ret = drv->pm->resume(dev); | |
506 | } else { | |
507 | ret = ibmebus_bus_legacy_resume(dev); | |
508 | } | |
509 | ||
510 | return ret; | |
511 | } | |
512 | ||
513 | static int ibmebus_bus_pm_resume_noirq(struct device *dev) | |
514 | { | |
515 | struct device_driver *drv = dev->driver; | |
516 | int ret = 0; | |
517 | ||
518 | if (!drv) | |
519 | return 0; | |
520 | ||
521 | if (drv->pm) { | |
522 | if (drv->pm->resume_noirq) | |
523 | ret = drv->pm->resume_noirq(dev); | |
524 | } | |
525 | ||
526 | return ret; | |
527 | } | |
528 | ||
529 | #else /* !CONFIG_SUSPEND */ | |
530 | ||
531 | #define ibmebus_bus_pm_suspend NULL | |
532 | #define ibmebus_bus_pm_resume NULL | |
533 | #define ibmebus_bus_pm_suspend_noirq NULL | |
534 | #define ibmebus_bus_pm_resume_noirq NULL | |
535 | ||
536 | #endif /* !CONFIG_SUSPEND */ | |
537 | ||
1f112cee | 538 | #ifdef CONFIG_HIBERNATE_CALLBACKS |
710ac54b GL |
539 | |
540 | static int ibmebus_bus_pm_freeze(struct device *dev) | |
541 | { | |
542 | struct device_driver *drv = dev->driver; | |
543 | int ret = 0; | |
544 | ||
545 | if (!drv) | |
546 | return 0; | |
547 | ||
548 | if (drv->pm) { | |
549 | if (drv->pm->freeze) | |
550 | ret = drv->pm->freeze(dev); | |
551 | } else { | |
552 | ret = ibmebus_bus_legacy_suspend(dev, PMSG_FREEZE); | |
553 | } | |
554 | ||
555 | return ret; | |
556 | } | |
557 | ||
558 | static int ibmebus_bus_pm_freeze_noirq(struct device *dev) | |
559 | { | |
560 | struct device_driver *drv = dev->driver; | |
561 | int ret = 0; | |
562 | ||
563 | if (!drv) | |
564 | return 0; | |
565 | ||
566 | if (drv->pm) { | |
567 | if (drv->pm->freeze_noirq) | |
568 | ret = drv->pm->freeze_noirq(dev); | |
569 | } | |
570 | ||
571 | return ret; | |
572 | } | |
573 | ||
574 | static int ibmebus_bus_pm_thaw(struct device *dev) | |
575 | { | |
576 | struct device_driver *drv = dev->driver; | |
577 | int ret = 0; | |
578 | ||
579 | if (!drv) | |
580 | return 0; | |
581 | ||
582 | if (drv->pm) { | |
583 | if (drv->pm->thaw) | |
584 | ret = drv->pm->thaw(dev); | |
585 | } else { | |
586 | ret = ibmebus_bus_legacy_resume(dev); | |
587 | } | |
588 | ||
589 | return ret; | |
590 | } | |
591 | ||
592 | static int ibmebus_bus_pm_thaw_noirq(struct device *dev) | |
593 | { | |
594 | struct device_driver *drv = dev->driver; | |
595 | int ret = 0; | |
596 | ||
597 | if (!drv) | |
598 | return 0; | |
599 | ||
600 | if (drv->pm) { | |
601 | if (drv->pm->thaw_noirq) | |
602 | ret = drv->pm->thaw_noirq(dev); | |
603 | } | |
604 | ||
605 | return ret; | |
606 | } | |
607 | ||
608 | static int ibmebus_bus_pm_poweroff(struct device *dev) | |
609 | { | |
610 | struct device_driver *drv = dev->driver; | |
611 | int ret = 0; | |
612 | ||
613 | if (!drv) | |
614 | return 0; | |
615 | ||
616 | if (drv->pm) { | |
617 | if (drv->pm->poweroff) | |
618 | ret = drv->pm->poweroff(dev); | |
619 | } else { | |
620 | ret = ibmebus_bus_legacy_suspend(dev, PMSG_HIBERNATE); | |
621 | } | |
622 | ||
623 | return ret; | |
624 | } | |
625 | ||
626 | static int ibmebus_bus_pm_poweroff_noirq(struct device *dev) | |
627 | { | |
628 | struct device_driver *drv = dev->driver; | |
629 | int ret = 0; | |
630 | ||
631 | if (!drv) | |
632 | return 0; | |
633 | ||
634 | if (drv->pm) { | |
635 | if (drv->pm->poweroff_noirq) | |
636 | ret = drv->pm->poweroff_noirq(dev); | |
637 | } | |
638 | ||
639 | return ret; | |
640 | } | |
641 | ||
642 | static int ibmebus_bus_pm_restore(struct device *dev) | |
643 | { | |
644 | struct device_driver *drv = dev->driver; | |
645 | int ret = 0; | |
646 | ||
647 | if (!drv) | |
648 | return 0; | |
649 | ||
650 | if (drv->pm) { | |
651 | if (drv->pm->restore) | |
652 | ret = drv->pm->restore(dev); | |
653 | } else { | |
654 | ret = ibmebus_bus_legacy_resume(dev); | |
655 | } | |
656 | ||
657 | return ret; | |
658 | } | |
659 | ||
660 | static int ibmebus_bus_pm_restore_noirq(struct device *dev) | |
661 | { | |
662 | struct device_driver *drv = dev->driver; | |
663 | int ret = 0; | |
664 | ||
665 | if (!drv) | |
666 | return 0; | |
667 | ||
668 | if (drv->pm) { | |
669 | if (drv->pm->restore_noirq) | |
670 | ret = drv->pm->restore_noirq(dev); | |
671 | } | |
672 | ||
673 | return ret; | |
674 | } | |
675 | ||
1f112cee | 676 | #else /* !CONFIG_HIBERNATE_CALLBACKS */ |
710ac54b GL |
677 | |
678 | #define ibmebus_bus_pm_freeze NULL | |
679 | #define ibmebus_bus_pm_thaw NULL | |
680 | #define ibmebus_bus_pm_poweroff NULL | |
681 | #define ibmebus_bus_pm_restore NULL | |
682 | #define ibmebus_bus_pm_freeze_noirq NULL | |
683 | #define ibmebus_bus_pm_thaw_noirq NULL | |
684 | #define ibmebus_bus_pm_poweroff_noirq NULL | |
685 | #define ibmebus_bus_pm_restore_noirq NULL | |
686 | ||
1f112cee | 687 | #endif /* !CONFIG_HIBERNATE_CALLBACKS */ |
710ac54b GL |
688 | |
689 | static struct dev_pm_ops ibmebus_bus_dev_pm_ops = { | |
690 | .prepare = ibmebus_bus_pm_prepare, | |
691 | .complete = ibmebus_bus_pm_complete, | |
692 | .suspend = ibmebus_bus_pm_suspend, | |
693 | .resume = ibmebus_bus_pm_resume, | |
694 | .freeze = ibmebus_bus_pm_freeze, | |
695 | .thaw = ibmebus_bus_pm_thaw, | |
696 | .poweroff = ibmebus_bus_pm_poweroff, | |
697 | .restore = ibmebus_bus_pm_restore, | |
698 | .suspend_noirq = ibmebus_bus_pm_suspend_noirq, | |
699 | .resume_noirq = ibmebus_bus_pm_resume_noirq, | |
700 | .freeze_noirq = ibmebus_bus_pm_freeze_noirq, | |
701 | .thaw_noirq = ibmebus_bus_pm_thaw_noirq, | |
702 | .poweroff_noirq = ibmebus_bus_pm_poweroff_noirq, | |
703 | .restore_noirq = ibmebus_bus_pm_restore_noirq, | |
704 | }; | |
705 | ||
706 | #define IBMEBUS_BUS_PM_OPS_PTR (&ibmebus_bus_dev_pm_ops) | |
707 | ||
708 | #else /* !CONFIG_PM_SLEEP */ | |
709 | ||
710 | #define IBMEBUS_BUS_PM_OPS_PTR NULL | |
711 | ||
712 | #endif /* !CONFIG_PM_SLEEP */ | |
713 | ||
d7a30103 | 714 | struct bus_type ibmebus_bus_type = { |
710ac54b | 715 | .name = "ibmebus", |
55347cc9 | 716 | .uevent = of_device_uevent, |
710ac54b GL |
717 | .bus_attrs = ibmebus_bus_attrs, |
718 | .match = ibmebus_bus_bus_match, | |
719 | .probe = ibmebus_bus_device_probe, | |
720 | .remove = ibmebus_bus_device_remove, | |
721 | .shutdown = ibmebus_bus_device_shutdown, | |
722 | .dev_attrs = ibmebus_bus_device_attrs, | |
723 | .pm = IBMEBUS_BUS_PM_OPS_PTR, | |
d7a30103 HS |
724 | }; |
725 | EXPORT_SYMBOL(ibmebus_bus_type); | |
726 | ||
727 | static int __init ibmebus_bus_init(void) | |
728 | { | |
729 | int err; | |
a8308800 | 730 | |
d7a30103 | 731 | printk(KERN_INFO "IBM eBus Device Driver\n"); |
a8308800 | 732 | |
710ac54b | 733 | err = bus_register(&ibmebus_bus_type); |
d7a30103 | 734 | if (err) { |
a988c0a6 | 735 | printk(KERN_ERR "%s: failed to register IBM eBus.\n", |
e48b1b45 | 736 | __func__); |
d7a30103 HS |
737 | return err; |
738 | } | |
a8308800 | 739 | |
6bccf755 | 740 | err = device_register(&ibmebus_bus_device); |
d7a30103 | 741 | if (err) { |
a8308800 | 742 | printk(KERN_WARNING "%s: device_register returned %i\n", |
e48b1b45 | 743 | __func__, err); |
d7a30103 HS |
744 | bus_unregister(&ibmebus_bus_type); |
745 | ||
746 | return err; | |
747 | } | |
a8308800 | 748 | |
1b17adf1 | 749 | err = ibmebus_create_devices(ibmebus_matches); |
55347cc9 JF |
750 | if (err) { |
751 | device_unregister(&ibmebus_bus_device); | |
752 | bus_unregister(&ibmebus_bus_type); | |
753 | return err; | |
754 | } | |
755 | ||
d7a30103 HS |
756 | return 0; |
757 | } | |
a988c0a6 | 758 | postcore_initcall(ibmebus_bus_init); |