Commit | Line | Data |
---|---|---|
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, | |
bfbf7d61 AP |
68 | gfp_t flag, |
69 | struct dma_attrs *attrs) | |
d7a30103 HS |
70 | { |
71 | void *mem; | |
a8308800 | 72 | |
d7a30103 HS |
73 | mem = kmalloc(size, flag); |
74 | *dma_handle = (dma_addr_t)mem; | |
75 | ||
76 | return mem; | |
77 | } | |
78 | ||
79 | static void ibmebus_free_coherent(struct device *dev, | |
a8308800 | 80 | size_t size, void *vaddr, |
bfbf7d61 AP |
81 | dma_addr_t dma_handle, |
82 | struct dma_attrs *attrs) | |
d7a30103 HS |
83 | { |
84 | kfree(vaddr); | |
85 | } | |
86 | ||
f9226d57 MN |
87 | static dma_addr_t ibmebus_map_page(struct device *dev, |
88 | struct page *page, | |
89 | unsigned long offset, | |
90 | size_t size, | |
91 | enum dma_data_direction direction, | |
92 | struct dma_attrs *attrs) | |
d7a30103 | 93 | { |
f9226d57 | 94 | return (dma_addr_t)(page_address(page) + offset); |
d7a30103 HS |
95 | } |
96 | ||
f9226d57 MN |
97 | static void ibmebus_unmap_page(struct device *dev, |
98 | dma_addr_t dma_addr, | |
99 | size_t size, | |
100 | enum dma_data_direction direction, | |
101 | struct dma_attrs *attrs) | |
d7a30103 HS |
102 | { |
103 | return; | |
104 | } | |
105 | ||
106 | static int ibmebus_map_sg(struct device *dev, | |
78bdc310 | 107 | struct scatterlist *sgl, |
3affedc4 MN |
108 | int nents, enum dma_data_direction direction, |
109 | struct dma_attrs *attrs) | |
d7a30103 | 110 | { |
78bdc310 | 111 | struct scatterlist *sg; |
d7a30103 | 112 | int i; |
a8308800 | 113 | |
78bdc310 | 114 | for_each_sg(sgl, sg, nents, i) { |
58b053e4 | 115 | sg->dma_address = (dma_addr_t) sg_virt(sg); |
78bdc310 | 116 | sg->dma_length = sg->length; |
d7a30103 | 117 | } |
a8308800 | 118 | |
d7a30103 HS |
119 | return nents; |
120 | } | |
121 | ||
122 | static void ibmebus_unmap_sg(struct device *dev, | |
123 | struct scatterlist *sg, | |
3affedc4 MN |
124 | int nents, enum dma_data_direction direction, |
125 | struct dma_attrs *attrs) | |
d7a30103 HS |
126 | { |
127 | return; | |
128 | } | |
129 | ||
130 | static int ibmebus_dma_supported(struct device *dev, u64 mask) | |
131 | { | |
d24f9c69 MM |
132 | return mask == DMA_BIT_MASK(64); |
133 | } | |
134 | ||
135 | static u64 ibmebus_dma_get_required_mask(struct device *dev) | |
136 | { | |
137 | return DMA_BIT_MASK(64); | |
d7a30103 HS |
138 | } |
139 | ||
45223c54 | 140 | static struct dma_map_ops ibmebus_dma_ops = { |
bfbf7d61 AP |
141 | .alloc = ibmebus_alloc_coherent, |
142 | .free = ibmebus_free_coherent, | |
2eccacd0 MM |
143 | .map_sg = ibmebus_map_sg, |
144 | .unmap_sg = ibmebus_unmap_sg, | |
145 | .dma_supported = ibmebus_dma_supported, | |
d24f9c69 | 146 | .get_required_mask = ibmebus_dma_get_required_mask, |
2eccacd0 MM |
147 | .map_page = ibmebus_map_page, |
148 | .unmap_page = ibmebus_unmap_page, | |
d7a30103 HS |
149 | }; |
150 | ||
55347cc9 JF |
151 | static int ibmebus_match_path(struct device *dev, void *data) |
152 | { | |
a454dc50 | 153 | struct device_node *dn = to_platform_device(dev)->dev.of_node; |
55347cc9 JF |
154 | return (dn->full_name && |
155 | (strcasecmp((char *)data, dn->full_name) == 0)); | |
156 | } | |
157 | ||
158 | static int ibmebus_match_node(struct device *dev, void *data) | |
159 | { | |
a454dc50 | 160 | return to_platform_device(dev)->dev.of_node == data; |
55347cc9 JF |
161 | } |
162 | ||
163 | static int ibmebus_create_device(struct device_node *dn) | |
164 | { | |
a454dc50 | 165 | struct platform_device *dev; |
55347cc9 JF |
166 | int ret; |
167 | ||
168 | dev = of_device_alloc(dn, NULL, &ibmebus_bus_device); | |
169 | if (!dev) | |
170 | return -ENOMEM; | |
171 | ||
172 | dev->dev.bus = &ibmebus_bus_type; | |
173 | dev->dev.archdata.dma_ops = &ibmebus_dma_ops; | |
174 | ||
7096d042 GL |
175 | ret = of_device_add(dev); |
176 | if (ret) | |
177 | platform_device_put(dev); | |
178 | return ret; | |
55347cc9 JF |
179 | } |
180 | ||
181 | static int ibmebus_create_devices(const struct of_device_id *matches) | |
182 | { | |
183 | struct device_node *root, *child; | |
184 | int ret = 0; | |
185 | ||
186 | root = of_find_node_by_path("/"); | |
187 | ||
85e99b9f | 188 | for_each_child_of_node(root, child) { |
55347cc9 JF |
189 | if (!of_match_node(matches, child)) |
190 | continue; | |
191 | ||
192 | if (bus_find_device(&ibmebus_bus_type, NULL, child, | |
193 | ibmebus_match_node)) | |
194 | continue; | |
195 | ||
196 | ret = ibmebus_create_device(child); | |
197 | if (ret) { | |
198 | printk(KERN_ERR "%s: failed to create device (%i)", | |
e48b1b45 | 199 | __func__, ret); |
55347cc9 JF |
200 | of_node_put(child); |
201 | break; | |
202 | } | |
203 | } | |
204 | ||
205 | of_node_put(root); | |
206 | return ret; | |
207 | } | |
208 | ||
6b08f3ae | 209 | int ibmebus_register_driver(struct of_platform_driver *drv) |
d7a30103 | 210 | { |
6b08f3ae | 211 | /* If the driver uses devices that ibmebus doesn't know, add them */ |
597b9d1e | 212 | ibmebus_create_devices(drv->driver.of_match_table); |
6b08f3ae | 213 | |
710ac54b GL |
214 | drv->driver.bus = &ibmebus_bus_type; |
215 | return driver_register(&drv->driver); | |
d7a30103 HS |
216 | } |
217 | EXPORT_SYMBOL(ibmebus_register_driver); | |
218 | ||
6b08f3ae | 219 | void ibmebus_unregister_driver(struct of_platform_driver *drv) |
a8308800 | 220 | { |
710ac54b | 221 | driver_unregister(&drv->driver); |
d7a30103 HS |
222 | } |
223 | EXPORT_SYMBOL(ibmebus_unregister_driver); | |
224 | ||
6b08f3ae JF |
225 | int ibmebus_request_irq(u32 ist, irq_handler_t handler, |
226 | unsigned long irq_flags, const char *devname, | |
d7a30103 HS |
227 | void *dev_id) |
228 | { | |
6e99e458 | 229 | unsigned int irq = irq_create_mapping(NULL, ist); |
a8308800 | 230 | |
d7a30103 HS |
231 | if (irq == NO_IRQ) |
232 | return -EINVAL; | |
a8308800 | 233 | |
6b08f3ae | 234 | return request_irq(irq, handler, irq_flags, devname, dev_id); |
d7a30103 HS |
235 | } |
236 | EXPORT_SYMBOL(ibmebus_request_irq); | |
237 | ||
6b08f3ae | 238 | void ibmebus_free_irq(u32 ist, void *dev_id) |
d7a30103 | 239 | { |
0ebfff14 | 240 | unsigned int irq = irq_find_mapping(NULL, ist); |
a8308800 | 241 | |
d7a30103 | 242 | free_irq(irq, dev_id); |
6358d6cb | 243 | irq_dispose_mapping(irq); |
d7a30103 HS |
244 | } |
245 | EXPORT_SYMBOL(ibmebus_free_irq); | |
246 | ||
0727702a JF |
247 | static char *ibmebus_chomp(const char *in, size_t count) |
248 | { | |
61a564fd JJ |
249 | char *out = kmalloc(count + 1, GFP_KERNEL); |
250 | ||
0727702a JF |
251 | if (!out) |
252 | return NULL; | |
253 | ||
254 | memcpy(out, in, count); | |
255 | out[count] = '\0'; | |
256 | if (out[count - 1] == '\n') | |
257 | out[count - 1] = '\0'; | |
258 | ||
259 | return out; | |
6bccf755 JF |
260 | } |
261 | ||
262 | static ssize_t ibmebus_store_probe(struct bus_type *bus, | |
263 | const char *buf, size_t count) | |
264 | { | |
265 | struct device_node *dn = NULL; | |
0727702a | 266 | char *path; |
55347cc9 | 267 | ssize_t rc = 0; |
0727702a JF |
268 | |
269 | path = ibmebus_chomp(buf, count); | |
270 | if (!path) | |
271 | return -ENOMEM; | |
272 | ||
273 | if (bus_find_device(&ibmebus_bus_type, NULL, path, | |
74c9b99d | 274 | ibmebus_match_path)) { |
0727702a | 275 | printk(KERN_WARNING "%s: %s has already been probed\n", |
e48b1b45 | 276 | __func__, path); |
74c9b99d | 277 | rc = -EEXIST; |
0727702a | 278 | goto out; |
6bccf755 JF |
279 | } |
280 | ||
0727702a | 281 | if ((dn = of_find_node_by_path(path))) { |
55347cc9 | 282 | rc = ibmebus_create_device(dn); |
0727702a | 283 | of_node_put(dn); |
0727702a JF |
284 | } else { |
285 | printk(KERN_WARNING "%s: no such device node: %s\n", | |
e48b1b45 | 286 | __func__, path); |
0727702a | 287 | rc = -ENODEV; |
6bccf755 JF |
288 | } |
289 | ||
0727702a JF |
290 | out: |
291 | kfree(path); | |
55347cc9 JF |
292 | if (rc) |
293 | return rc; | |
294 | return count; | |
6bccf755 JF |
295 | } |
296 | ||
297 | static ssize_t ibmebus_store_remove(struct bus_type *bus, | |
298 | const char *buf, size_t count) | |
299 | { | |
300 | struct device *dev; | |
0727702a | 301 | char *path; |
6bccf755 | 302 | |
0727702a JF |
303 | path = ibmebus_chomp(buf, count); |
304 | if (!path) | |
305 | return -ENOMEM; | |
306 | ||
307 | if ((dev = bus_find_device(&ibmebus_bus_type, NULL, path, | |
308 | ibmebus_match_path))) { | |
a454dc50 | 309 | of_device_unregister(to_platform_device(dev)); |
0727702a JF |
310 | |
311 | kfree(path); | |
312 | return count; | |
6bccf755 | 313 | } else { |
0727702a | 314 | printk(KERN_WARNING "%s: %s not on the bus\n", |
e48b1b45 | 315 | __func__, path); |
0727702a JF |
316 | |
317 | kfree(path); | |
6bccf755 JF |
318 | return -ENODEV; |
319 | } | |
6bccf755 JF |
320 | } |
321 | ||
710ac54b | 322 | |
6bccf755 JF |
323 | static struct bus_attribute ibmebus_bus_attrs[] = { |
324 | __ATTR(probe, S_IWUSR, NULL, ibmebus_store_probe), | |
325 | __ATTR(remove, S_IWUSR, NULL, ibmebus_store_remove), | |
326 | __ATTR_NULL | |
327 | }; | |
328 | ||
710ac54b GL |
329 | static int ibmebus_bus_bus_match(struct device *dev, struct device_driver *drv) |
330 | { | |
331 | const struct of_device_id *matches = drv->of_match_table; | |
332 | ||
333 | if (!matches) | |
334 | return 0; | |
335 | ||
336 | return of_match_device(matches, dev) != NULL; | |
337 | } | |
338 | ||
339 | static int ibmebus_bus_device_probe(struct device *dev) | |
340 | { | |
341 | int error = -ENODEV; | |
342 | struct of_platform_driver *drv; | |
343 | struct platform_device *of_dev; | |
344 | const struct of_device_id *match; | |
345 | ||
346 | drv = to_of_platform_driver(dev->driver); | |
347 | of_dev = to_platform_device(dev); | |
348 | ||
349 | if (!drv->probe) | |
350 | return error; | |
351 | ||
352 | of_dev_get(of_dev); | |
353 | ||
354 | match = of_match_device(drv->driver.of_match_table, dev); | |
355 | if (match) | |
356 | error = drv->probe(of_dev, match); | |
357 | if (error) | |
358 | of_dev_put(of_dev); | |
359 | ||
360 | return error; | |
361 | } | |
362 | ||
363 | static int ibmebus_bus_device_remove(struct device *dev) | |
364 | { | |
365 | struct platform_device *of_dev = to_platform_device(dev); | |
366 | struct of_platform_driver *drv = to_of_platform_driver(dev->driver); | |
367 | ||
368 | if (dev->driver && drv->remove) | |
369 | drv->remove(of_dev); | |
370 | return 0; | |
371 | } | |
372 | ||
373 | static void ibmebus_bus_device_shutdown(struct device *dev) | |
374 | { | |
375 | struct platform_device *of_dev = to_platform_device(dev); | |
376 | struct of_platform_driver *drv = to_of_platform_driver(dev->driver); | |
377 | ||
378 | if (dev->driver && drv->shutdown) | |
379 | drv->shutdown(of_dev); | |
380 | } | |
381 | ||
382 | /* | |
383 | * ibmebus_bus_device_attrs | |
384 | */ | |
385 | static ssize_t devspec_show(struct device *dev, | |
386 | struct device_attribute *attr, char *buf) | |
387 | { | |
388 | struct platform_device *ofdev; | |
389 | ||
390 | ofdev = to_platform_device(dev); | |
391 | return sprintf(buf, "%s\n", ofdev->dev.of_node->full_name); | |
392 | } | |
393 | ||
394 | static ssize_t name_show(struct device *dev, | |
395 | struct device_attribute *attr, char *buf) | |
396 | { | |
397 | struct platform_device *ofdev; | |
398 | ||
399 | ofdev = to_platform_device(dev); | |
400 | return sprintf(buf, "%s\n", ofdev->dev.of_node->name); | |
401 | } | |
402 | ||
403 | static ssize_t modalias_show(struct device *dev, | |
404 | struct device_attribute *attr, char *buf) | |
405 | { | |
406 | ssize_t len = of_device_get_modalias(dev, buf, PAGE_SIZE - 2); | |
407 | buf[len] = '\n'; | |
408 | buf[len+1] = 0; | |
409 | return len+1; | |
410 | } | |
411 | ||
412 | struct device_attribute ibmebus_bus_device_attrs[] = { | |
413 | __ATTR_RO(devspec), | |
414 | __ATTR_RO(name), | |
415 | __ATTR_RO(modalias), | |
416 | __ATTR_NULL | |
417 | }; | |
418 | ||
419 | #ifdef CONFIG_PM_SLEEP | |
420 | static int ibmebus_bus_legacy_suspend(struct device *dev, pm_message_t mesg) | |
421 | { | |
422 | struct platform_device *of_dev = to_platform_device(dev); | |
423 | struct of_platform_driver *drv = to_of_platform_driver(dev->driver); | |
424 | int ret = 0; | |
425 | ||
426 | if (dev->driver && drv->suspend) | |
427 | ret = drv->suspend(of_dev, mesg); | |
428 | return ret; | |
429 | } | |
430 | ||
431 | static int ibmebus_bus_legacy_resume(struct device *dev) | |
432 | { | |
433 | struct platform_device *of_dev = to_platform_device(dev); | |
434 | struct of_platform_driver *drv = to_of_platform_driver(dev->driver); | |
435 | int ret = 0; | |
436 | ||
437 | if (dev->driver && drv->resume) | |
438 | ret = drv->resume(of_dev); | |
439 | return ret; | |
440 | } | |
441 | ||
442 | static int ibmebus_bus_pm_prepare(struct device *dev) | |
443 | { | |
444 | struct device_driver *drv = dev->driver; | |
445 | int ret = 0; | |
446 | ||
447 | if (drv && drv->pm && drv->pm->prepare) | |
448 | ret = drv->pm->prepare(dev); | |
449 | ||
450 | return ret; | |
451 | } | |
452 | ||
453 | static void ibmebus_bus_pm_complete(struct device *dev) | |
454 | { | |
455 | struct device_driver *drv = dev->driver; | |
456 | ||
457 | if (drv && drv->pm && drv->pm->complete) | |
458 | drv->pm->complete(dev); | |
459 | } | |
460 | ||
461 | #ifdef CONFIG_SUSPEND | |
462 | ||
463 | static int ibmebus_bus_pm_suspend(struct device *dev) | |
464 | { | |
465 | struct device_driver *drv = dev->driver; | |
466 | int ret = 0; | |
467 | ||
468 | if (!drv) | |
469 | return 0; | |
470 | ||
471 | if (drv->pm) { | |
472 | if (drv->pm->suspend) | |
473 | ret = drv->pm->suspend(dev); | |
474 | } else { | |
475 | ret = ibmebus_bus_legacy_suspend(dev, PMSG_SUSPEND); | |
476 | } | |
477 | ||
478 | return ret; | |
479 | } | |
480 | ||
481 | static int ibmebus_bus_pm_suspend_noirq(struct device *dev) | |
482 | { | |
483 | struct device_driver *drv = dev->driver; | |
484 | int ret = 0; | |
485 | ||
486 | if (!drv) | |
487 | return 0; | |
488 | ||
489 | if (drv->pm) { | |
490 | if (drv->pm->suspend_noirq) | |
491 | ret = drv->pm->suspend_noirq(dev); | |
492 | } | |
493 | ||
494 | return ret; | |
495 | } | |
496 | ||
497 | static int ibmebus_bus_pm_resume(struct device *dev) | |
498 | { | |
499 | struct device_driver *drv = dev->driver; | |
500 | int ret = 0; | |
501 | ||
502 | if (!drv) | |
503 | return 0; | |
504 | ||
505 | if (drv->pm) { | |
506 | if (drv->pm->resume) | |
507 | ret = drv->pm->resume(dev); | |
508 | } else { | |
509 | ret = ibmebus_bus_legacy_resume(dev); | |
510 | } | |
511 | ||
512 | return ret; | |
513 | } | |
514 | ||
515 | static int ibmebus_bus_pm_resume_noirq(struct device *dev) | |
516 | { | |
517 | struct device_driver *drv = dev->driver; | |
518 | int ret = 0; | |
519 | ||
520 | if (!drv) | |
521 | return 0; | |
522 | ||
523 | if (drv->pm) { | |
524 | if (drv->pm->resume_noirq) | |
525 | ret = drv->pm->resume_noirq(dev); | |
526 | } | |
527 | ||
528 | return ret; | |
529 | } | |
530 | ||
531 | #else /* !CONFIG_SUSPEND */ | |
532 | ||
533 | #define ibmebus_bus_pm_suspend NULL | |
534 | #define ibmebus_bus_pm_resume NULL | |
535 | #define ibmebus_bus_pm_suspend_noirq NULL | |
536 | #define ibmebus_bus_pm_resume_noirq NULL | |
537 | ||
538 | #endif /* !CONFIG_SUSPEND */ | |
539 | ||
1f112cee | 540 | #ifdef CONFIG_HIBERNATE_CALLBACKS |
710ac54b GL |
541 | |
542 | static int ibmebus_bus_pm_freeze(struct device *dev) | |
543 | { | |
544 | struct device_driver *drv = dev->driver; | |
545 | int ret = 0; | |
546 | ||
547 | if (!drv) | |
548 | return 0; | |
549 | ||
550 | if (drv->pm) { | |
551 | if (drv->pm->freeze) | |
552 | ret = drv->pm->freeze(dev); | |
553 | } else { | |
554 | ret = ibmebus_bus_legacy_suspend(dev, PMSG_FREEZE); | |
555 | } | |
556 | ||
557 | return ret; | |
558 | } | |
559 | ||
560 | static int ibmebus_bus_pm_freeze_noirq(struct device *dev) | |
561 | { | |
562 | struct device_driver *drv = dev->driver; | |
563 | int ret = 0; | |
564 | ||
565 | if (!drv) | |
566 | return 0; | |
567 | ||
568 | if (drv->pm) { | |
569 | if (drv->pm->freeze_noirq) | |
570 | ret = drv->pm->freeze_noirq(dev); | |
571 | } | |
572 | ||
573 | return ret; | |
574 | } | |
575 | ||
576 | static int ibmebus_bus_pm_thaw(struct device *dev) | |
577 | { | |
578 | struct device_driver *drv = dev->driver; | |
579 | int ret = 0; | |
580 | ||
581 | if (!drv) | |
582 | return 0; | |
583 | ||
584 | if (drv->pm) { | |
585 | if (drv->pm->thaw) | |
586 | ret = drv->pm->thaw(dev); | |
587 | } else { | |
588 | ret = ibmebus_bus_legacy_resume(dev); | |
589 | } | |
590 | ||
591 | return ret; | |
592 | } | |
593 | ||
594 | static int ibmebus_bus_pm_thaw_noirq(struct device *dev) | |
595 | { | |
596 | struct device_driver *drv = dev->driver; | |
597 | int ret = 0; | |
598 | ||
599 | if (!drv) | |
600 | return 0; | |
601 | ||
602 | if (drv->pm) { | |
603 | if (drv->pm->thaw_noirq) | |
604 | ret = drv->pm->thaw_noirq(dev); | |
605 | } | |
606 | ||
607 | return ret; | |
608 | } | |
609 | ||
610 | static int ibmebus_bus_pm_poweroff(struct device *dev) | |
611 | { | |
612 | struct device_driver *drv = dev->driver; | |
613 | int ret = 0; | |
614 | ||
615 | if (!drv) | |
616 | return 0; | |
617 | ||
618 | if (drv->pm) { | |
619 | if (drv->pm->poweroff) | |
620 | ret = drv->pm->poweroff(dev); | |
621 | } else { | |
622 | ret = ibmebus_bus_legacy_suspend(dev, PMSG_HIBERNATE); | |
623 | } | |
624 | ||
625 | return ret; | |
626 | } | |
627 | ||
628 | static int ibmebus_bus_pm_poweroff_noirq(struct device *dev) | |
629 | { | |
630 | struct device_driver *drv = dev->driver; | |
631 | int ret = 0; | |
632 | ||
633 | if (!drv) | |
634 | return 0; | |
635 | ||
636 | if (drv->pm) { | |
637 | if (drv->pm->poweroff_noirq) | |
638 | ret = drv->pm->poweroff_noirq(dev); | |
639 | } | |
640 | ||
641 | return ret; | |
642 | } | |
643 | ||
644 | static int ibmebus_bus_pm_restore(struct device *dev) | |
645 | { | |
646 | struct device_driver *drv = dev->driver; | |
647 | int ret = 0; | |
648 | ||
649 | if (!drv) | |
650 | return 0; | |
651 | ||
652 | if (drv->pm) { | |
653 | if (drv->pm->restore) | |
654 | ret = drv->pm->restore(dev); | |
655 | } else { | |
656 | ret = ibmebus_bus_legacy_resume(dev); | |
657 | } | |
658 | ||
659 | return ret; | |
660 | } | |
661 | ||
662 | static int ibmebus_bus_pm_restore_noirq(struct device *dev) | |
663 | { | |
664 | struct device_driver *drv = dev->driver; | |
665 | int ret = 0; | |
666 | ||
667 | if (!drv) | |
668 | return 0; | |
669 | ||
670 | if (drv->pm) { | |
671 | if (drv->pm->restore_noirq) | |
672 | ret = drv->pm->restore_noirq(dev); | |
673 | } | |
674 | ||
675 | return ret; | |
676 | } | |
677 | ||
1f112cee | 678 | #else /* !CONFIG_HIBERNATE_CALLBACKS */ |
710ac54b GL |
679 | |
680 | #define ibmebus_bus_pm_freeze NULL | |
681 | #define ibmebus_bus_pm_thaw NULL | |
682 | #define ibmebus_bus_pm_poweroff NULL | |
683 | #define ibmebus_bus_pm_restore NULL | |
684 | #define ibmebus_bus_pm_freeze_noirq NULL | |
685 | #define ibmebus_bus_pm_thaw_noirq NULL | |
686 | #define ibmebus_bus_pm_poweroff_noirq NULL | |
687 | #define ibmebus_bus_pm_restore_noirq NULL | |
688 | ||
1f112cee | 689 | #endif /* !CONFIG_HIBERNATE_CALLBACKS */ |
710ac54b GL |
690 | |
691 | static struct dev_pm_ops ibmebus_bus_dev_pm_ops = { | |
692 | .prepare = ibmebus_bus_pm_prepare, | |
693 | .complete = ibmebus_bus_pm_complete, | |
694 | .suspend = ibmebus_bus_pm_suspend, | |
695 | .resume = ibmebus_bus_pm_resume, | |
696 | .freeze = ibmebus_bus_pm_freeze, | |
697 | .thaw = ibmebus_bus_pm_thaw, | |
698 | .poweroff = ibmebus_bus_pm_poweroff, | |
699 | .restore = ibmebus_bus_pm_restore, | |
700 | .suspend_noirq = ibmebus_bus_pm_suspend_noirq, | |
701 | .resume_noirq = ibmebus_bus_pm_resume_noirq, | |
702 | .freeze_noirq = ibmebus_bus_pm_freeze_noirq, | |
703 | .thaw_noirq = ibmebus_bus_pm_thaw_noirq, | |
704 | .poweroff_noirq = ibmebus_bus_pm_poweroff_noirq, | |
705 | .restore_noirq = ibmebus_bus_pm_restore_noirq, | |
706 | }; | |
707 | ||
708 | #define IBMEBUS_BUS_PM_OPS_PTR (&ibmebus_bus_dev_pm_ops) | |
709 | ||
710 | #else /* !CONFIG_PM_SLEEP */ | |
711 | ||
712 | #define IBMEBUS_BUS_PM_OPS_PTR NULL | |
713 | ||
714 | #endif /* !CONFIG_PM_SLEEP */ | |
715 | ||
d7a30103 | 716 | struct bus_type ibmebus_bus_type = { |
710ac54b | 717 | .name = "ibmebus", |
55347cc9 | 718 | .uevent = of_device_uevent, |
710ac54b GL |
719 | .bus_attrs = ibmebus_bus_attrs, |
720 | .match = ibmebus_bus_bus_match, | |
721 | .probe = ibmebus_bus_device_probe, | |
722 | .remove = ibmebus_bus_device_remove, | |
723 | .shutdown = ibmebus_bus_device_shutdown, | |
724 | .dev_attrs = ibmebus_bus_device_attrs, | |
725 | .pm = IBMEBUS_BUS_PM_OPS_PTR, | |
d7a30103 HS |
726 | }; |
727 | EXPORT_SYMBOL(ibmebus_bus_type); | |
728 | ||
729 | static int __init ibmebus_bus_init(void) | |
730 | { | |
731 | int err; | |
a8308800 | 732 | |
d7a30103 | 733 | printk(KERN_INFO "IBM eBus Device Driver\n"); |
a8308800 | 734 | |
710ac54b | 735 | err = bus_register(&ibmebus_bus_type); |
d7a30103 | 736 | if (err) { |
a988c0a6 | 737 | printk(KERN_ERR "%s: failed to register IBM eBus.\n", |
e48b1b45 | 738 | __func__); |
d7a30103 HS |
739 | return err; |
740 | } | |
a8308800 | 741 | |
6bccf755 | 742 | err = device_register(&ibmebus_bus_device); |
d7a30103 | 743 | if (err) { |
a8308800 | 744 | printk(KERN_WARNING "%s: device_register returned %i\n", |
e48b1b45 | 745 | __func__, err); |
d7a30103 HS |
746 | bus_unregister(&ibmebus_bus_type); |
747 | ||
748 | return err; | |
749 | } | |
a8308800 | 750 | |
1b17adf1 | 751 | err = ibmebus_create_devices(ibmebus_matches); |
55347cc9 JF |
752 | if (err) { |
753 | device_unregister(&ibmebus_bus_device); | |
754 | bus_unregister(&ibmebus_bus_type); | |
755 | return err; | |
756 | } | |
757 | ||
d7a30103 HS |
758 | return 0; |
759 | } | |
a988c0a6 | 760 | postcore_initcall(ibmebus_bus_init); |