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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 | ||
58b8d51b MP |
243 | /* |
244 | * At this point we have a full @path, from source to sink. The | |
245 | * sink is the first entry and the source the last one. Go through | |
246 | * all the components and enable them one by one. | |
247 | */ | |
a06ae860 PP |
248 | list_for_each_entry(cd, path, path_link) { |
249 | if (cd == list_first_entry(path, struct coresight_device, | |
250 | path_link)) { | |
251 | ret = coresight_enable_sink(cd); | |
252 | } else if (list_is_last(&cd->path_link, path)) { | |
253 | /* | |
254 | * Don't enable the source just yet - this needs to | |
255 | * happen at the very end when all links and sink | |
256 | * along the path have been configured properly. | |
257 | */ | |
258 | ; | |
259 | } else { | |
260 | ret = coresight_enable_link(cd); | |
261 | } | |
262 | if (ret) | |
263 | goto err; | |
264 | } | |
265 | ||
266 | return 0; | |
267 | err: | |
268 | list_for_each_entry_continue_reverse(cd, path, path_link) { | |
269 | if (cd == list_first_entry(path, struct coresight_device, | |
270 | path_link)) { | |
271 | coresight_disable_sink(cd); | |
272 | } else if (list_is_last(&cd->path_link, path)) { | |
273 | ; | |
274 | } else { | |
275 | coresight_disable_link(cd); | |
276 | } | |
277 | } | |
278 | ||
279 | return ret; | |
280 | } | |
281 | ||
282 | static int coresight_disable_path(struct list_head *path) | |
283 | { | |
284 | struct coresight_device *cd; | |
285 | ||
286 | list_for_each_entry_reverse(cd, path, path_link) { | |
287 | if (cd == list_first_entry(path, struct coresight_device, | |
288 | path_link)) { | |
289 | coresight_disable_sink(cd); | |
290 | } else if (list_is_last(&cd->path_link, path)) { | |
291 | /* | |
292 | * The source has already been stopped, no need | |
293 | * to do it again here. | |
294 | */ | |
295 | ; | |
296 | } else { | |
297 | coresight_disable_link(cd); | |
298 | } | |
299 | } | |
300 | ||
301 | return 0; | |
302 | } | |
303 | ||
304 | static int coresight_build_paths(struct coresight_device *csdev, | |
305 | struct list_head *path, | |
306 | bool enable) | |
307 | { | |
308 | int i, ret = -EINVAL; | |
309 | struct coresight_connection *conn; | |
310 | ||
311 | list_add(&csdev->path_link, path); | |
312 | ||
a0a500ef XK |
313 | if ((csdev->type == CORESIGHT_DEV_TYPE_SINK || |
314 | csdev->type == CORESIGHT_DEV_TYPE_LINKSINK) && | |
315 | csdev->activated) { | |
a06ae860 PP |
316 | if (enable) |
317 | ret = coresight_enable_path(path); | |
318 | else | |
319 | ret = coresight_disable_path(path); | |
320 | } else { | |
321 | for (i = 0; i < csdev->nr_outport; i++) { | |
322 | conn = &csdev->conns[i]; | |
323 | if (coresight_build_paths(conn->child_dev, | |
324 | path, enable) == 0) | |
325 | ret = 0; | |
326 | } | |
327 | } | |
328 | ||
329 | if (list_first_entry(path, struct coresight_device, path_link) != csdev) | |
330 | dev_err(&csdev->dev, "wrong device in %s\n", __func__); | |
331 | ||
332 | list_del(&csdev->path_link); | |
333 | ||
334 | return ret; | |
335 | } | |
336 | ||
337 | int coresight_enable(struct coresight_device *csdev) | |
338 | { | |
339 | int ret = 0; | |
340 | LIST_HEAD(path); | |
341 | ||
342 | mutex_lock(&coresight_mutex); | |
343 | if (csdev->type != CORESIGHT_DEV_TYPE_SOURCE) { | |
344 | ret = -EINVAL; | |
345 | dev_err(&csdev->dev, "wrong device type in %s\n", __func__); | |
346 | goto out; | |
347 | } | |
348 | if (csdev->enable) | |
349 | goto out; | |
350 | ||
351 | if (coresight_build_paths(csdev, &path, true)) { | |
352 | dev_err(&csdev->dev, "building path(s) failed\n"); | |
353 | goto out; | |
354 | } | |
355 | ||
356 | if (coresight_enable_source(csdev)) | |
357 | dev_err(&csdev->dev, "source enable failed\n"); | |
358 | out: | |
359 | mutex_unlock(&coresight_mutex); | |
360 | return ret; | |
361 | } | |
362 | EXPORT_SYMBOL_GPL(coresight_enable); | |
363 | ||
364 | void coresight_disable(struct coresight_device *csdev) | |
365 | { | |
366 | LIST_HEAD(path); | |
367 | ||
368 | mutex_lock(&coresight_mutex); | |
369 | if (csdev->type != CORESIGHT_DEV_TYPE_SOURCE) { | |
370 | dev_err(&csdev->dev, "wrong device type in %s\n", __func__); | |
371 | goto out; | |
372 | } | |
373 | if (!csdev->enable) | |
374 | goto out; | |
375 | ||
376 | coresight_disable_source(csdev); | |
377 | if (coresight_build_paths(csdev, &path, false)) | |
378 | dev_err(&csdev->dev, "releasing path(s) failed\n"); | |
379 | ||
380 | out: | |
381 | mutex_unlock(&coresight_mutex); | |
382 | } | |
383 | EXPORT_SYMBOL_GPL(coresight_disable); | |
384 | ||
385 | static ssize_t enable_sink_show(struct device *dev, | |
386 | struct device_attribute *attr, char *buf) | |
387 | { | |
388 | struct coresight_device *csdev = to_coresight_device(dev); | |
389 | ||
390 | return scnprintf(buf, PAGE_SIZE, "%u\n", (unsigned)csdev->activated); | |
391 | } | |
392 | ||
393 | static ssize_t enable_sink_store(struct device *dev, | |
394 | struct device_attribute *attr, | |
395 | const char *buf, size_t size) | |
396 | { | |
397 | int ret; | |
398 | unsigned long val; | |
399 | struct coresight_device *csdev = to_coresight_device(dev); | |
400 | ||
401 | ret = kstrtoul(buf, 10, &val); | |
402 | if (ret) | |
403 | return ret; | |
404 | ||
405 | if (val) | |
406 | csdev->activated = true; | |
407 | else | |
408 | csdev->activated = false; | |
409 | ||
410 | return size; | |
411 | ||
412 | } | |
413 | static DEVICE_ATTR_RW(enable_sink); | |
414 | ||
415 | static ssize_t enable_source_show(struct device *dev, | |
416 | struct device_attribute *attr, char *buf) | |
417 | { | |
418 | struct coresight_device *csdev = to_coresight_device(dev); | |
419 | ||
420 | return scnprintf(buf, PAGE_SIZE, "%u\n", (unsigned)csdev->enable); | |
421 | } | |
422 | ||
423 | static ssize_t enable_source_store(struct device *dev, | |
424 | struct device_attribute *attr, | |
425 | const char *buf, size_t size) | |
426 | { | |
427 | int ret = 0; | |
428 | unsigned long val; | |
429 | struct coresight_device *csdev = to_coresight_device(dev); | |
430 | ||
431 | ret = kstrtoul(buf, 10, &val); | |
432 | if (ret) | |
433 | return ret; | |
434 | ||
435 | if (val) { | |
436 | ret = coresight_enable(csdev); | |
437 | if (ret) | |
438 | return ret; | |
439 | } else { | |
440 | coresight_disable(csdev); | |
441 | } | |
442 | ||
443 | return size; | |
444 | } | |
445 | static DEVICE_ATTR_RW(enable_source); | |
446 | ||
447 | static struct attribute *coresight_sink_attrs[] = { | |
448 | &dev_attr_enable_sink.attr, | |
449 | NULL, | |
450 | }; | |
451 | ATTRIBUTE_GROUPS(coresight_sink); | |
452 | ||
453 | static struct attribute *coresight_source_attrs[] = { | |
454 | &dev_attr_enable_source.attr, | |
455 | NULL, | |
456 | }; | |
457 | ATTRIBUTE_GROUPS(coresight_source); | |
458 | ||
459 | static struct device_type coresight_dev_type[] = { | |
460 | { | |
461 | .name = "none", | |
462 | }, | |
463 | { | |
464 | .name = "sink", | |
465 | .groups = coresight_sink_groups, | |
466 | }, | |
467 | { | |
468 | .name = "link", | |
469 | }, | |
470 | { | |
471 | .name = "linksink", | |
472 | .groups = coresight_sink_groups, | |
473 | }, | |
474 | { | |
475 | .name = "source", | |
476 | .groups = coresight_source_groups, | |
477 | }, | |
478 | }; | |
479 | ||
480 | static void coresight_device_release(struct device *dev) | |
481 | { | |
482 | struct coresight_device *csdev = to_coresight_device(dev); | |
483 | ||
484 | kfree(csdev); | |
485 | } | |
486 | ||
487 | static int coresight_orphan_match(struct device *dev, void *data) | |
488 | { | |
489 | int i; | |
490 | bool still_orphan = false; | |
491 | struct coresight_device *csdev, *i_csdev; | |
492 | struct coresight_connection *conn; | |
493 | ||
494 | csdev = data; | |
495 | i_csdev = to_coresight_device(dev); | |
496 | ||
497 | /* No need to check oneself */ | |
498 | if (csdev == i_csdev) | |
499 | return 0; | |
500 | ||
501 | /* Move on to another component if no connection is orphan */ | |
502 | if (!i_csdev->orphan) | |
503 | return 0; | |
504 | /* | |
505 | * Circle throuch all the connection of that component. If we find | |
506 | * an orphan connection whose name matches @csdev, link it. | |
507 | */ | |
d786a47d | 508 | for (i = 0; i < i_csdev->nr_outport; i++) { |
a06ae860 PP |
509 | conn = &i_csdev->conns[i]; |
510 | ||
511 | /* We have found at least one orphan connection */ | |
512 | if (conn->child_dev == NULL) { | |
513 | /* Does it match this newly added device? */ | |
22394bc5 | 514 | if (!strcmp(dev_name(&csdev->dev), conn->child_name)) { |
a06ae860 | 515 | conn->child_dev = csdev; |
22394bc5 KX |
516 | } else { |
517 | /* This component still has an orphan */ | |
518 | still_orphan = true; | |
519 | } | |
a06ae860 PP |
520 | } |
521 | } | |
522 | ||
523 | i_csdev->orphan = still_orphan; | |
524 | ||
525 | /* | |
526 | * Returning '0' ensures that all known component on the | |
527 | * bus will be checked. | |
528 | */ | |
529 | return 0; | |
530 | } | |
531 | ||
532 | static void coresight_fixup_orphan_conns(struct coresight_device *csdev) | |
533 | { | |
534 | /* | |
535 | * No need to check for a return value as orphan connection(s) | |
536 | * are hooked-up with each newly added component. | |
537 | */ | |
538 | bus_for_each_dev(&coresight_bustype, NULL, | |
539 | csdev, coresight_orphan_match); | |
540 | } | |
541 | ||
542 | ||
543 | static int coresight_name_match(struct device *dev, void *data) | |
544 | { | |
545 | char *to_match; | |
546 | struct coresight_device *i_csdev; | |
547 | ||
548 | to_match = data; | |
549 | i_csdev = to_coresight_device(dev); | |
550 | ||
fadf3a44 | 551 | if (to_match && !strcmp(to_match, dev_name(&i_csdev->dev))) |
a06ae860 PP |
552 | return 1; |
553 | ||
554 | return 0; | |
555 | } | |
556 | ||
557 | static void coresight_fixup_device_conns(struct coresight_device *csdev) | |
558 | { | |
559 | int i; | |
560 | struct device *dev = NULL; | |
561 | struct coresight_connection *conn; | |
562 | ||
563 | for (i = 0; i < csdev->nr_outport; i++) { | |
564 | conn = &csdev->conns[i]; | |
565 | dev = bus_find_device(&coresight_bustype, NULL, | |
566 | (void *)conn->child_name, | |
567 | coresight_name_match); | |
568 | ||
569 | if (dev) { | |
570 | conn->child_dev = to_coresight_device(dev); | |
571 | } else { | |
572 | csdev->orphan = true; | |
573 | conn->child_dev = NULL; | |
574 | } | |
575 | } | |
576 | } | |
577 | ||
578 | /** | |
579 | * coresight_timeout - loop until a bit has changed to a specific state. | |
580 | * @addr: base address of the area of interest. | |
581 | * @offset: address of a register, starting from @addr. | |
582 | * @position: the position of the bit of interest. | |
583 | * @value: the value the bit should have. | |
584 | * | |
585 | * Return: 0 as soon as the bit has taken the desired state or -EAGAIN if | |
586 | * TIMEOUT_US has elapsed, which ever happens first. | |
587 | */ | |
588 | ||
589 | int coresight_timeout(void __iomem *addr, u32 offset, int position, int value) | |
590 | { | |
591 | int i; | |
592 | u32 val; | |
593 | ||
594 | for (i = TIMEOUT_US; i > 0; i--) { | |
595 | val = __raw_readl(addr + offset); | |
596 | /* waiting on the bit to go from 0 to 1 */ | |
597 | if (value) { | |
598 | if (val & BIT(position)) | |
599 | return 0; | |
600 | /* waiting on the bit to go from 1 to 0 */ | |
601 | } else { | |
602 | if (!(val & BIT(position))) | |
603 | return 0; | |
604 | } | |
605 | ||
606 | /* | |
607 | * Delay is arbitrary - the specification doesn't say how long | |
608 | * we are expected to wait. Extra check required to make sure | |
609 | * we don't wait needlessly on the last iteration. | |
610 | */ | |
611 | if (i - 1) | |
612 | udelay(1); | |
613 | } | |
614 | ||
615 | return -EAGAIN; | |
616 | } | |
617 | ||
618 | struct bus_type coresight_bustype = { | |
619 | .name = "coresight", | |
620 | }; | |
621 | ||
622 | static int __init coresight_init(void) | |
623 | { | |
624 | return bus_register(&coresight_bustype); | |
625 | } | |
626 | postcore_initcall(coresight_init); | |
627 | ||
628 | struct coresight_device *coresight_register(struct coresight_desc *desc) | |
629 | { | |
630 | int i; | |
631 | int ret; | |
632 | int link_subtype; | |
633 | int nr_refcnts = 1; | |
634 | atomic_t *refcnts = NULL; | |
635 | struct coresight_device *csdev; | |
636 | struct coresight_connection *conns; | |
637 | ||
638 | csdev = kzalloc(sizeof(*csdev), GFP_KERNEL); | |
639 | if (!csdev) { | |
640 | ret = -ENOMEM; | |
641 | goto err_kzalloc_csdev; | |
642 | } | |
643 | ||
644 | if (desc->type == CORESIGHT_DEV_TYPE_LINK || | |
645 | desc->type == CORESIGHT_DEV_TYPE_LINKSINK) { | |
646 | link_subtype = desc->subtype.link_subtype; | |
647 | ||
648 | if (link_subtype == CORESIGHT_DEV_SUBTYPE_LINK_MERG) | |
649 | nr_refcnts = desc->pdata->nr_inport; | |
650 | else if (link_subtype == CORESIGHT_DEV_SUBTYPE_LINK_SPLIT) | |
651 | nr_refcnts = desc->pdata->nr_outport; | |
652 | } | |
653 | ||
654 | refcnts = kcalloc(nr_refcnts, sizeof(*refcnts), GFP_KERNEL); | |
655 | if (!refcnts) { | |
656 | ret = -ENOMEM; | |
657 | goto err_kzalloc_refcnts; | |
658 | } | |
659 | ||
660 | csdev->refcnt = refcnts; | |
661 | ||
662 | csdev->nr_inport = desc->pdata->nr_inport; | |
663 | csdev->nr_outport = desc->pdata->nr_outport; | |
664 | conns = kcalloc(csdev->nr_outport, sizeof(*conns), GFP_KERNEL); | |
665 | if (!conns) { | |
666 | ret = -ENOMEM; | |
667 | goto err_kzalloc_conns; | |
668 | } | |
669 | ||
670 | for (i = 0; i < csdev->nr_outport; i++) { | |
671 | conns[i].outport = desc->pdata->outports[i]; | |
672 | conns[i].child_name = desc->pdata->child_names[i]; | |
673 | conns[i].child_port = desc->pdata->child_ports[i]; | |
674 | } | |
675 | ||
676 | csdev->conns = conns; | |
677 | ||
678 | csdev->type = desc->type; | |
679 | csdev->subtype = desc->subtype; | |
680 | csdev->ops = desc->ops; | |
681 | csdev->orphan = false; | |
682 | ||
683 | csdev->dev.type = &coresight_dev_type[desc->type]; | |
684 | csdev->dev.groups = desc->groups; | |
685 | csdev->dev.parent = desc->dev; | |
686 | csdev->dev.release = coresight_device_release; | |
687 | csdev->dev.bus = &coresight_bustype; | |
688 | dev_set_name(&csdev->dev, "%s", desc->pdata->name); | |
689 | ||
690 | ret = device_register(&csdev->dev); | |
691 | if (ret) | |
692 | goto err_device_register; | |
693 | ||
694 | mutex_lock(&coresight_mutex); | |
695 | ||
696 | coresight_fixup_device_conns(csdev); | |
697 | coresight_fixup_orphan_conns(csdev); | |
698 | ||
699 | mutex_unlock(&coresight_mutex); | |
700 | ||
701 | return csdev; | |
702 | ||
703 | err_device_register: | |
704 | kfree(conns); | |
705 | err_kzalloc_conns: | |
706 | kfree(refcnts); | |
707 | err_kzalloc_refcnts: | |
708 | kfree(csdev); | |
709 | err_kzalloc_csdev: | |
710 | return ERR_PTR(ret); | |
711 | } | |
712 | EXPORT_SYMBOL_GPL(coresight_register); | |
713 | ||
714 | void coresight_unregister(struct coresight_device *csdev) | |
715 | { | |
716 | mutex_lock(&coresight_mutex); | |
717 | ||
718 | kfree(csdev->conns); | |
719 | device_unregister(&csdev->dev); | |
720 | ||
721 | mutex_unlock(&coresight_mutex); | |
722 | } | |
723 | EXPORT_SYMBOL_GPL(coresight_unregister); | |
724 | ||
725 | MODULE_LICENSE("GPL v2"); |