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a06ae860 PP |
1 | /* Copyright (c) 2012, The Linux Foundation. All rights reserved. |
2 | * | |
3 | * This program is free software; you can redistribute it and/or modify | |
4 | * it under the terms of the GNU General Public License version 2 and | |
5 | * only version 2 as published by the Free Software Foundation. | |
6 | * | |
7 | * This program is distributed in the hope that it will be useful, | |
8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
10 | * GNU General Public License for more details. | |
11 | */ | |
12 | ||
13 | #include <linux/kernel.h> | |
14 | #include <linux/module.h> | |
15 | #include <linux/init.h> | |
16 | #include <linux/types.h> | |
17 | #include <linux/device.h> | |
18 | #include <linux/io.h> | |
19 | #include <linux/err.h> | |
20 | #include <linux/export.h> | |
21 | #include <linux/slab.h> | |
22 | #include <linux/mutex.h> | |
23 | #include <linux/clk.h> | |
24 | #include <linux/coresight.h> | |
25 | #include <linux/of_platform.h> | |
26 | #include <linux/delay.h> | |
27 | ||
28 | #include "coresight-priv.h" | |
29 | ||
30 | static DEFINE_MUTEX(coresight_mutex); | |
31 | ||
32 | static int coresight_id_match(struct device *dev, void *data) | |
33 | { | |
34 | int trace_id, i_trace_id; | |
35 | struct coresight_device *csdev, *i_csdev; | |
36 | ||
37 | csdev = data; | |
38 | i_csdev = to_coresight_device(dev); | |
39 | ||
40 | /* | |
41 | * No need to care about oneself and components that are not | |
42 | * sources or not enabled | |
43 | */ | |
44 | if (i_csdev == csdev || !i_csdev->enable || | |
45 | i_csdev->type != CORESIGHT_DEV_TYPE_SOURCE) | |
46 | return 0; | |
47 | ||
48 | /* Get the source ID for both compoment */ | |
49 | trace_id = source_ops(csdev)->trace_id(csdev); | |
50 | i_trace_id = source_ops(i_csdev)->trace_id(i_csdev); | |
51 | ||
52 | /* All you need is one */ | |
53 | if (trace_id == i_trace_id) | |
54 | return 1; | |
55 | ||
56 | return 0; | |
57 | } | |
58 | ||
59 | static int coresight_source_is_unique(struct coresight_device *csdev) | |
60 | { | |
61 | int trace_id = source_ops(csdev)->trace_id(csdev); | |
62 | ||
63 | /* this shouldn't happen */ | |
64 | if (trace_id < 0) | |
65 | return 0; | |
66 | ||
67 | return !bus_for_each_dev(&coresight_bustype, NULL, | |
68 | csdev, coresight_id_match); | |
69 | } | |
70 | ||
71 | static int coresight_find_link_inport(struct coresight_device *csdev) | |
72 | { | |
73 | int i; | |
74 | struct coresight_device *parent; | |
75 | struct coresight_connection *conn; | |
76 | ||
77 | parent = container_of(csdev->path_link.next, | |
78 | struct coresight_device, path_link); | |
79 | ||
80 | for (i = 0; i < parent->nr_outport; i++) { | |
81 | conn = &parent->conns[i]; | |
82 | if (conn->child_dev == csdev) | |
83 | return conn->child_port; | |
84 | } | |
85 | ||
86 | dev_err(&csdev->dev, "couldn't find inport, parent: %s, child: %s\n", | |
87 | dev_name(&parent->dev), dev_name(&csdev->dev)); | |
88 | ||
89 | return 0; | |
90 | } | |
91 | ||
92 | static int coresight_find_link_outport(struct coresight_device *csdev) | |
93 | { | |
94 | int i; | |
95 | struct coresight_device *child; | |
96 | struct coresight_connection *conn; | |
97 | ||
98 | child = container_of(csdev->path_link.prev, | |
99 | struct coresight_device, path_link); | |
100 | ||
101 | for (i = 0; i < csdev->nr_outport; i++) { | |
102 | conn = &csdev->conns[i]; | |
103 | if (conn->child_dev == child) | |
104 | return conn->outport; | |
105 | } | |
106 | ||
107 | dev_err(&csdev->dev, "couldn't find outport, parent: %s, child: %s\n", | |
108 | dev_name(&csdev->dev), dev_name(&child->dev)); | |
109 | ||
110 | return 0; | |
111 | } | |
112 | ||
113 | static int coresight_enable_sink(struct coresight_device *csdev) | |
114 | { | |
115 | int ret; | |
116 | ||
117 | if (!csdev->enable) { | |
118 | if (sink_ops(csdev)->enable) { | |
119 | ret = sink_ops(csdev)->enable(csdev); | |
120 | if (ret) | |
121 | return ret; | |
122 | } | |
123 | csdev->enable = true; | |
124 | } | |
125 | ||
126 | atomic_inc(csdev->refcnt); | |
127 | ||
128 | return 0; | |
129 | } | |
130 | ||
131 | static void coresight_disable_sink(struct coresight_device *csdev) | |
132 | { | |
133 | if (atomic_dec_return(csdev->refcnt) == 0) { | |
134 | if (sink_ops(csdev)->disable) { | |
135 | sink_ops(csdev)->disable(csdev); | |
136 | csdev->enable = false; | |
137 | } | |
138 | } | |
139 | } | |
140 | ||
141 | static int coresight_enable_link(struct coresight_device *csdev) | |
142 | { | |
143 | int ret; | |
144 | int link_subtype; | |
145 | int refport, inport, outport; | |
146 | ||
147 | inport = coresight_find_link_inport(csdev); | |
148 | outport = coresight_find_link_outport(csdev); | |
149 | link_subtype = csdev->subtype.link_subtype; | |
150 | ||
151 | if (link_subtype == CORESIGHT_DEV_SUBTYPE_LINK_MERG) | |
152 | refport = inport; | |
153 | else if (link_subtype == CORESIGHT_DEV_SUBTYPE_LINK_SPLIT) | |
154 | refport = outport; | |
155 | else | |
156 | refport = 0; | |
157 | ||
158 | if (atomic_inc_return(&csdev->refcnt[refport]) == 1) { | |
159 | if (link_ops(csdev)->enable) { | |
160 | ret = link_ops(csdev)->enable(csdev, inport, outport); | |
161 | if (ret) | |
162 | return ret; | |
163 | } | |
164 | } | |
165 | ||
166 | csdev->enable = true; | |
167 | ||
168 | return 0; | |
169 | } | |
170 | ||
171 | static void coresight_disable_link(struct coresight_device *csdev) | |
172 | { | |
173 | int i, nr_conns; | |
174 | int link_subtype; | |
175 | int refport, inport, outport; | |
176 | ||
177 | inport = coresight_find_link_inport(csdev); | |
178 | outport = coresight_find_link_outport(csdev); | |
179 | link_subtype = csdev->subtype.link_subtype; | |
180 | ||
181 | if (link_subtype == CORESIGHT_DEV_SUBTYPE_LINK_MERG) { | |
182 | refport = inport; | |
183 | nr_conns = csdev->nr_inport; | |
184 | } else if (link_subtype == CORESIGHT_DEV_SUBTYPE_LINK_SPLIT) { | |
185 | refport = outport; | |
186 | nr_conns = csdev->nr_outport; | |
187 | } else { | |
188 | refport = 0; | |
189 | nr_conns = 1; | |
190 | } | |
191 | ||
192 | if (atomic_dec_return(&csdev->refcnt[refport]) == 0) { | |
193 | if (link_ops(csdev)->disable) | |
194 | link_ops(csdev)->disable(csdev, inport, outport); | |
195 | } | |
196 | ||
197 | for (i = 0; i < nr_conns; i++) | |
198 | if (atomic_read(&csdev->refcnt[i]) != 0) | |
199 | return; | |
200 | ||
201 | csdev->enable = false; | |
202 | } | |
203 | ||
204 | static int coresight_enable_source(struct coresight_device *csdev) | |
205 | { | |
206 | int ret; | |
207 | ||
208 | if (!coresight_source_is_unique(csdev)) { | |
209 | dev_warn(&csdev->dev, "traceID %d not unique\n", | |
210 | source_ops(csdev)->trace_id(csdev)); | |
211 | return -EINVAL; | |
212 | } | |
213 | ||
214 | if (!csdev->enable) { | |
215 | if (source_ops(csdev)->enable) { | |
216 | ret = source_ops(csdev)->enable(csdev); | |
217 | if (ret) | |
218 | return ret; | |
219 | } | |
220 | csdev->enable = true; | |
221 | } | |
222 | ||
223 | atomic_inc(csdev->refcnt); | |
224 | ||
225 | return 0; | |
226 | } | |
227 | ||
228 | static void coresight_disable_source(struct coresight_device *csdev) | |
229 | { | |
230 | if (atomic_dec_return(csdev->refcnt) == 0) { | |
231 | if (source_ops(csdev)->disable) { | |
232 | source_ops(csdev)->disable(csdev); | |
233 | csdev->enable = false; | |
234 | } | |
235 | } | |
236 | } | |
237 | ||
238 | static int coresight_enable_path(struct list_head *path) | |
239 | { | |
240 | int ret = 0; | |
241 | struct coresight_device *cd; | |
242 | ||
243 | list_for_each_entry(cd, path, path_link) { | |
244 | if (cd == list_first_entry(path, struct coresight_device, | |
245 | path_link)) { | |
246 | ret = coresight_enable_sink(cd); | |
247 | } else if (list_is_last(&cd->path_link, path)) { | |
248 | /* | |
249 | * Don't enable the source just yet - this needs to | |
250 | * happen at the very end when all links and sink | |
251 | * along the path have been configured properly. | |
252 | */ | |
253 | ; | |
254 | } else { | |
255 | ret = coresight_enable_link(cd); | |
256 | } | |
257 | if (ret) | |
258 | goto err; | |
259 | } | |
260 | ||
261 | return 0; | |
262 | err: | |
263 | list_for_each_entry_continue_reverse(cd, path, path_link) { | |
264 | if (cd == list_first_entry(path, struct coresight_device, | |
265 | path_link)) { | |
266 | coresight_disable_sink(cd); | |
267 | } else if (list_is_last(&cd->path_link, path)) { | |
268 | ; | |
269 | } else { | |
270 | coresight_disable_link(cd); | |
271 | } | |
272 | } | |
273 | ||
274 | return ret; | |
275 | } | |
276 | ||
277 | static int coresight_disable_path(struct list_head *path) | |
278 | { | |
279 | struct coresight_device *cd; | |
280 | ||
281 | list_for_each_entry_reverse(cd, path, path_link) { | |
282 | if (cd == list_first_entry(path, struct coresight_device, | |
283 | path_link)) { | |
284 | coresight_disable_sink(cd); | |
285 | } else if (list_is_last(&cd->path_link, path)) { | |
286 | /* | |
287 | * The source has already been stopped, no need | |
288 | * to do it again here. | |
289 | */ | |
290 | ; | |
291 | } else { | |
292 | coresight_disable_link(cd); | |
293 | } | |
294 | } | |
295 | ||
296 | return 0; | |
297 | } | |
298 | ||
299 | static int coresight_build_paths(struct coresight_device *csdev, | |
300 | struct list_head *path, | |
301 | bool enable) | |
302 | { | |
303 | int i, ret = -EINVAL; | |
304 | struct coresight_connection *conn; | |
305 | ||
306 | list_add(&csdev->path_link, path); | |
307 | ||
308 | if (csdev->type == CORESIGHT_DEV_TYPE_SINK && csdev->activated) { | |
309 | if (enable) | |
310 | ret = coresight_enable_path(path); | |
311 | else | |
312 | ret = coresight_disable_path(path); | |
313 | } else { | |
314 | for (i = 0; i < csdev->nr_outport; i++) { | |
315 | conn = &csdev->conns[i]; | |
316 | if (coresight_build_paths(conn->child_dev, | |
317 | path, enable) == 0) | |
318 | ret = 0; | |
319 | } | |
320 | } | |
321 | ||
322 | if (list_first_entry(path, struct coresight_device, path_link) != csdev) | |
323 | dev_err(&csdev->dev, "wrong device in %s\n", __func__); | |
324 | ||
325 | list_del(&csdev->path_link); | |
326 | ||
327 | return ret; | |
328 | } | |
329 | ||
330 | int coresight_enable(struct coresight_device *csdev) | |
331 | { | |
332 | int ret = 0; | |
333 | LIST_HEAD(path); | |
334 | ||
335 | mutex_lock(&coresight_mutex); | |
336 | if (csdev->type != CORESIGHT_DEV_TYPE_SOURCE) { | |
337 | ret = -EINVAL; | |
338 | dev_err(&csdev->dev, "wrong device type in %s\n", __func__); | |
339 | goto out; | |
340 | } | |
341 | if (csdev->enable) | |
342 | goto out; | |
343 | ||
344 | if (coresight_build_paths(csdev, &path, true)) { | |
345 | dev_err(&csdev->dev, "building path(s) failed\n"); | |
346 | goto out; | |
347 | } | |
348 | ||
349 | if (coresight_enable_source(csdev)) | |
350 | dev_err(&csdev->dev, "source enable failed\n"); | |
351 | out: | |
352 | mutex_unlock(&coresight_mutex); | |
353 | return ret; | |
354 | } | |
355 | EXPORT_SYMBOL_GPL(coresight_enable); | |
356 | ||
357 | void coresight_disable(struct coresight_device *csdev) | |
358 | { | |
359 | LIST_HEAD(path); | |
360 | ||
361 | mutex_lock(&coresight_mutex); | |
362 | if (csdev->type != CORESIGHT_DEV_TYPE_SOURCE) { | |
363 | dev_err(&csdev->dev, "wrong device type in %s\n", __func__); | |
364 | goto out; | |
365 | } | |
366 | if (!csdev->enable) | |
367 | goto out; | |
368 | ||
369 | coresight_disable_source(csdev); | |
370 | if (coresight_build_paths(csdev, &path, false)) | |
371 | dev_err(&csdev->dev, "releasing path(s) failed\n"); | |
372 | ||
373 | out: | |
374 | mutex_unlock(&coresight_mutex); | |
375 | } | |
376 | EXPORT_SYMBOL_GPL(coresight_disable); | |
377 | ||
378 | static ssize_t enable_sink_show(struct device *dev, | |
379 | struct device_attribute *attr, char *buf) | |
380 | { | |
381 | struct coresight_device *csdev = to_coresight_device(dev); | |
382 | ||
383 | return scnprintf(buf, PAGE_SIZE, "%u\n", (unsigned)csdev->activated); | |
384 | } | |
385 | ||
386 | static ssize_t enable_sink_store(struct device *dev, | |
387 | struct device_attribute *attr, | |
388 | const char *buf, size_t size) | |
389 | { | |
390 | int ret; | |
391 | unsigned long val; | |
392 | struct coresight_device *csdev = to_coresight_device(dev); | |
393 | ||
394 | ret = kstrtoul(buf, 10, &val); | |
395 | if (ret) | |
396 | return ret; | |
397 | ||
398 | if (val) | |
399 | csdev->activated = true; | |
400 | else | |
401 | csdev->activated = false; | |
402 | ||
403 | return size; | |
404 | ||
405 | } | |
406 | static DEVICE_ATTR_RW(enable_sink); | |
407 | ||
408 | static ssize_t enable_source_show(struct device *dev, | |
409 | struct device_attribute *attr, char *buf) | |
410 | { | |
411 | struct coresight_device *csdev = to_coresight_device(dev); | |
412 | ||
413 | return scnprintf(buf, PAGE_SIZE, "%u\n", (unsigned)csdev->enable); | |
414 | } | |
415 | ||
416 | static ssize_t enable_source_store(struct device *dev, | |
417 | struct device_attribute *attr, | |
418 | const char *buf, size_t size) | |
419 | { | |
420 | int ret = 0; | |
421 | unsigned long val; | |
422 | struct coresight_device *csdev = to_coresight_device(dev); | |
423 | ||
424 | ret = kstrtoul(buf, 10, &val); | |
425 | if (ret) | |
426 | return ret; | |
427 | ||
428 | if (val) { | |
429 | ret = coresight_enable(csdev); | |
430 | if (ret) | |
431 | return ret; | |
432 | } else { | |
433 | coresight_disable(csdev); | |
434 | } | |
435 | ||
436 | return size; | |
437 | } | |
438 | static DEVICE_ATTR_RW(enable_source); | |
439 | ||
440 | static struct attribute *coresight_sink_attrs[] = { | |
441 | &dev_attr_enable_sink.attr, | |
442 | NULL, | |
443 | }; | |
444 | ATTRIBUTE_GROUPS(coresight_sink); | |
445 | ||
446 | static struct attribute *coresight_source_attrs[] = { | |
447 | &dev_attr_enable_source.attr, | |
448 | NULL, | |
449 | }; | |
450 | ATTRIBUTE_GROUPS(coresight_source); | |
451 | ||
452 | static struct device_type coresight_dev_type[] = { | |
453 | { | |
454 | .name = "none", | |
455 | }, | |
456 | { | |
457 | .name = "sink", | |
458 | .groups = coresight_sink_groups, | |
459 | }, | |
460 | { | |
461 | .name = "link", | |
462 | }, | |
463 | { | |
464 | .name = "linksink", | |
465 | .groups = coresight_sink_groups, | |
466 | }, | |
467 | { | |
468 | .name = "source", | |
469 | .groups = coresight_source_groups, | |
470 | }, | |
471 | }; | |
472 | ||
473 | static void coresight_device_release(struct device *dev) | |
474 | { | |
475 | struct coresight_device *csdev = to_coresight_device(dev); | |
476 | ||
477 | kfree(csdev); | |
478 | } | |
479 | ||
480 | static int coresight_orphan_match(struct device *dev, void *data) | |
481 | { | |
482 | int i; | |
483 | bool still_orphan = false; | |
484 | struct coresight_device *csdev, *i_csdev; | |
485 | struct coresight_connection *conn; | |
486 | ||
487 | csdev = data; | |
488 | i_csdev = to_coresight_device(dev); | |
489 | ||
490 | /* No need to check oneself */ | |
491 | if (csdev == i_csdev) | |
492 | return 0; | |
493 | ||
494 | /* Move on to another component if no connection is orphan */ | |
495 | if (!i_csdev->orphan) | |
496 | return 0; | |
497 | /* | |
498 | * Circle throuch all the connection of that component. If we find | |
499 | * an orphan connection whose name matches @csdev, link it. | |
500 | */ | |
501 | for (i = 0; i < i_csdev->nr_outport; i++) { | |
502 | conn = &i_csdev->conns[i]; | |
503 | ||
504 | /* We have found at least one orphan connection */ | |
505 | if (conn->child_dev == NULL) { | |
506 | /* Does it match this newly added device? */ | |
507 | if (!strcmp(dev_name(&csdev->dev), conn->child_name)) | |
508 | conn->child_dev = csdev; | |
509 | } else { | |
510 | /* Too bad, this component still has an orphan */ | |
511 | still_orphan = true; | |
512 | } | |
513 | } | |
514 | ||
515 | i_csdev->orphan = still_orphan; | |
516 | ||
517 | /* | |
518 | * Returning '0' ensures that all known component on the | |
519 | * bus will be checked. | |
520 | */ | |
521 | return 0; | |
522 | } | |
523 | ||
524 | static void coresight_fixup_orphan_conns(struct coresight_device *csdev) | |
525 | { | |
526 | /* | |
527 | * No need to check for a return value as orphan connection(s) | |
528 | * are hooked-up with each newly added component. | |
529 | */ | |
530 | bus_for_each_dev(&coresight_bustype, NULL, | |
531 | csdev, coresight_orphan_match); | |
532 | } | |
533 | ||
534 | ||
535 | static int coresight_name_match(struct device *dev, void *data) | |
536 | { | |
537 | char *to_match; | |
538 | struct coresight_device *i_csdev; | |
539 | ||
540 | to_match = data; | |
541 | i_csdev = to_coresight_device(dev); | |
542 | ||
543 | if (!strcmp(to_match, dev_name(&i_csdev->dev))) | |
544 | return 1; | |
545 | ||
546 | return 0; | |
547 | } | |
548 | ||
549 | static void coresight_fixup_device_conns(struct coresight_device *csdev) | |
550 | { | |
551 | int i; | |
552 | struct device *dev = NULL; | |
553 | struct coresight_connection *conn; | |
554 | ||
555 | for (i = 0; i < csdev->nr_outport; i++) { | |
556 | conn = &csdev->conns[i]; | |
557 | dev = bus_find_device(&coresight_bustype, NULL, | |
558 | (void *)conn->child_name, | |
559 | coresight_name_match); | |
560 | ||
561 | if (dev) { | |
562 | conn->child_dev = to_coresight_device(dev); | |
563 | } else { | |
564 | csdev->orphan = true; | |
565 | conn->child_dev = NULL; | |
566 | } | |
567 | } | |
568 | } | |
569 | ||
570 | /** | |
571 | * coresight_timeout - loop until a bit has changed to a specific state. | |
572 | * @addr: base address of the area of interest. | |
573 | * @offset: address of a register, starting from @addr. | |
574 | * @position: the position of the bit of interest. | |
575 | * @value: the value the bit should have. | |
576 | * | |
577 | * Return: 0 as soon as the bit has taken the desired state or -EAGAIN if | |
578 | * TIMEOUT_US has elapsed, which ever happens first. | |
579 | */ | |
580 | ||
581 | int coresight_timeout(void __iomem *addr, u32 offset, int position, int value) | |
582 | { | |
583 | int i; | |
584 | u32 val; | |
585 | ||
586 | for (i = TIMEOUT_US; i > 0; i--) { | |
587 | val = __raw_readl(addr + offset); | |
588 | /* waiting on the bit to go from 0 to 1 */ | |
589 | if (value) { | |
590 | if (val & BIT(position)) | |
591 | return 0; | |
592 | /* waiting on the bit to go from 1 to 0 */ | |
593 | } else { | |
594 | if (!(val & BIT(position))) | |
595 | return 0; | |
596 | } | |
597 | ||
598 | /* | |
599 | * Delay is arbitrary - the specification doesn't say how long | |
600 | * we are expected to wait. Extra check required to make sure | |
601 | * we don't wait needlessly on the last iteration. | |
602 | */ | |
603 | if (i - 1) | |
604 | udelay(1); | |
605 | } | |
606 | ||
607 | return -EAGAIN; | |
608 | } | |
609 | ||
610 | struct bus_type coresight_bustype = { | |
611 | .name = "coresight", | |
612 | }; | |
613 | ||
614 | static int __init coresight_init(void) | |
615 | { | |
616 | return bus_register(&coresight_bustype); | |
617 | } | |
618 | postcore_initcall(coresight_init); | |
619 | ||
620 | struct coresight_device *coresight_register(struct coresight_desc *desc) | |
621 | { | |
622 | int i; | |
623 | int ret; | |
624 | int link_subtype; | |
625 | int nr_refcnts = 1; | |
626 | atomic_t *refcnts = NULL; | |
627 | struct coresight_device *csdev; | |
628 | struct coresight_connection *conns; | |
629 | ||
630 | csdev = kzalloc(sizeof(*csdev), GFP_KERNEL); | |
631 | if (!csdev) { | |
632 | ret = -ENOMEM; | |
633 | goto err_kzalloc_csdev; | |
634 | } | |
635 | ||
636 | if (desc->type == CORESIGHT_DEV_TYPE_LINK || | |
637 | desc->type == CORESIGHT_DEV_TYPE_LINKSINK) { | |
638 | link_subtype = desc->subtype.link_subtype; | |
639 | ||
640 | if (link_subtype == CORESIGHT_DEV_SUBTYPE_LINK_MERG) | |
641 | nr_refcnts = desc->pdata->nr_inport; | |
642 | else if (link_subtype == CORESIGHT_DEV_SUBTYPE_LINK_SPLIT) | |
643 | nr_refcnts = desc->pdata->nr_outport; | |
644 | } | |
645 | ||
646 | refcnts = kcalloc(nr_refcnts, sizeof(*refcnts), GFP_KERNEL); | |
647 | if (!refcnts) { | |
648 | ret = -ENOMEM; | |
649 | goto err_kzalloc_refcnts; | |
650 | } | |
651 | ||
652 | csdev->refcnt = refcnts; | |
653 | ||
654 | csdev->nr_inport = desc->pdata->nr_inport; | |
655 | csdev->nr_outport = desc->pdata->nr_outport; | |
656 | conns = kcalloc(csdev->nr_outport, sizeof(*conns), GFP_KERNEL); | |
657 | if (!conns) { | |
658 | ret = -ENOMEM; | |
659 | goto err_kzalloc_conns; | |
660 | } | |
661 | ||
662 | for (i = 0; i < csdev->nr_outport; i++) { | |
663 | conns[i].outport = desc->pdata->outports[i]; | |
664 | conns[i].child_name = desc->pdata->child_names[i]; | |
665 | conns[i].child_port = desc->pdata->child_ports[i]; | |
666 | } | |
667 | ||
668 | csdev->conns = conns; | |
669 | ||
670 | csdev->type = desc->type; | |
671 | csdev->subtype = desc->subtype; | |
672 | csdev->ops = desc->ops; | |
673 | csdev->orphan = false; | |
674 | ||
675 | csdev->dev.type = &coresight_dev_type[desc->type]; | |
676 | csdev->dev.groups = desc->groups; | |
677 | csdev->dev.parent = desc->dev; | |
678 | csdev->dev.release = coresight_device_release; | |
679 | csdev->dev.bus = &coresight_bustype; | |
680 | dev_set_name(&csdev->dev, "%s", desc->pdata->name); | |
681 | ||
682 | ret = device_register(&csdev->dev); | |
683 | if (ret) | |
684 | goto err_device_register; | |
685 | ||
686 | mutex_lock(&coresight_mutex); | |
687 | ||
688 | coresight_fixup_device_conns(csdev); | |
689 | coresight_fixup_orphan_conns(csdev); | |
690 | ||
691 | mutex_unlock(&coresight_mutex); | |
692 | ||
693 | return csdev; | |
694 | ||
695 | err_device_register: | |
696 | kfree(conns); | |
697 | err_kzalloc_conns: | |
698 | kfree(refcnts); | |
699 | err_kzalloc_refcnts: | |
700 | kfree(csdev); | |
701 | err_kzalloc_csdev: | |
702 | return ERR_PTR(ret); | |
703 | } | |
704 | EXPORT_SYMBOL_GPL(coresight_register); | |
705 | ||
706 | void coresight_unregister(struct coresight_device *csdev) | |
707 | { | |
708 | mutex_lock(&coresight_mutex); | |
709 | ||
710 | kfree(csdev->conns); | |
711 | device_unregister(&csdev->dev); | |
712 | ||
713 | mutex_unlock(&coresight_mutex); | |
714 | } | |
715 | EXPORT_SYMBOL_GPL(coresight_unregister); | |
716 | ||
717 | MODULE_LICENSE("GPL v2"); |