Commit | Line | Data |
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2bfde348 CG |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* | |
3 | * configfs.c - Implementation of configfs interface to the driver stack | |
4 | * | |
5 | * Copyright (C) 2013-2015 Microchip Technology Germany II GmbH & Co. KG | |
6 | */ | |
7 | ||
8 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
9 | #include <linux/module.h> | |
10 | #include <linux/slab.h> | |
11 | #include <linux/init.h> | |
12 | #include <linux/configfs.h> | |
b2765275 | 13 | #include <linux/most.h> |
2bfde348 | 14 | |
c3bb9d88 CG |
15 | #define MAX_STRING_SIZE 80 |
16 | ||
2bfde348 CG |
17 | struct mdev_link { |
18 | struct config_item item; | |
acdbb897 | 19 | struct list_head list; |
2bfde348 | 20 | bool create_link; |
1a89eb0a | 21 | bool destroy_link; |
2bfde348 CG |
22 | u16 num_buffers; |
23 | u16 buffer_size; | |
24 | u16 subbuffer_size; | |
25 | u16 packets_per_xact; | |
26 | u16 dbr_size; | |
c3bb9d88 CG |
27 | char datatype[MAX_STRING_SIZE]; |
28 | char direction[MAX_STRING_SIZE]; | |
29 | char name[MAX_STRING_SIZE]; | |
30 | char device[MAX_STRING_SIZE]; | |
31 | char channel[MAX_STRING_SIZE]; | |
32 | char comp[MAX_STRING_SIZE]; | |
33 | char comp_params[MAX_STRING_SIZE]; | |
2bfde348 CG |
34 | }; |
35 | ||
a5c79505 | 36 | static struct list_head mdev_link_list; |
acdbb897 | 37 | |
2bfde348 CG |
38 | static int set_cfg_buffer_size(struct mdev_link *link) |
39 | { | |
2bfde348 CG |
40 | return most_set_cfg_buffer_size(link->device, link->channel, |
41 | link->buffer_size); | |
42 | } | |
43 | ||
44 | static int set_cfg_subbuffer_size(struct mdev_link *link) | |
45 | { | |
2bfde348 CG |
46 | return most_set_cfg_subbuffer_size(link->device, link->channel, |
47 | link->subbuffer_size); | |
48 | } | |
49 | ||
50 | static int set_cfg_dbr_size(struct mdev_link *link) | |
51 | { | |
2bfde348 CG |
52 | return most_set_cfg_dbr_size(link->device, link->channel, |
53 | link->dbr_size); | |
54 | } | |
55 | ||
56 | static int set_cfg_num_buffers(struct mdev_link *link) | |
57 | { | |
2bfde348 CG |
58 | return most_set_cfg_num_buffers(link->device, link->channel, |
59 | link->num_buffers); | |
60 | } | |
61 | ||
62 | static int set_cfg_packets_xact(struct mdev_link *link) | |
63 | { | |
2bfde348 CG |
64 | return most_set_cfg_packets_xact(link->device, link->channel, |
65 | link->packets_per_xact); | |
66 | } | |
67 | ||
68 | static int set_cfg_direction(struct mdev_link *link) | |
69 | { | |
2bfde348 CG |
70 | return most_set_cfg_direction(link->device, link->channel, |
71 | link->direction); | |
72 | } | |
73 | ||
74 | static int set_cfg_datatype(struct mdev_link *link) | |
75 | { | |
2bfde348 CG |
76 | return most_set_cfg_datatype(link->device, link->channel, |
77 | link->datatype); | |
78 | } | |
79 | ||
80 | static int (*set_config_val[])(struct mdev_link *link) = { | |
81 | set_cfg_buffer_size, | |
82 | set_cfg_subbuffer_size, | |
83 | set_cfg_dbr_size, | |
84 | set_cfg_num_buffers, | |
85 | set_cfg_packets_xact, | |
86 | set_cfg_direction, | |
87 | set_cfg_datatype, | |
88 | }; | |
89 | ||
90 | static struct mdev_link *to_mdev_link(struct config_item *item) | |
91 | { | |
92 | return container_of(item, struct mdev_link, item); | |
93 | } | |
94 | ||
acdbb897 CG |
95 | static int set_config_and_add_link(struct mdev_link *mdev_link) |
96 | { | |
97 | int i; | |
98 | int ret; | |
99 | ||
100 | for (i = 0; i < ARRAY_SIZE(set_config_val); i++) { | |
101 | ret = set_config_val[i](mdev_link); | |
102 | if (ret < 0 && ret != -ENODEV) { | |
103 | pr_err("Config failed\n"); | |
104 | return ret; | |
105 | } | |
106 | } | |
107 | ||
108 | return most_add_link(mdev_link->device, mdev_link->channel, | |
109 | mdev_link->comp, mdev_link->name, | |
110 | mdev_link->comp_params); | |
111 | } | |
112 | ||
2bfde348 CG |
113 | static ssize_t mdev_link_create_link_store(struct config_item *item, |
114 | const char *page, size_t count) | |
115 | { | |
116 | struct mdev_link *mdev_link = to_mdev_link(item); | |
117 | bool tmp; | |
118 | int ret; | |
2bfde348 CG |
119 | |
120 | ret = kstrtobool(page, &tmp); | |
121 | if (ret) | |
122 | return ret; | |
acdbb897 | 123 | if (!tmp) |
1a89eb0a | 124 | return count; |
acdbb897 CG |
125 | ret = set_config_and_add_link(mdev_link); |
126 | if (ret && ret != -ENODEV) | |
2bfde348 | 127 | return ret; |
acdbb897 | 128 | list_add_tail(&mdev_link->list, &mdev_link_list); |
2bfde348 | 129 | mdev_link->create_link = tmp; |
f9e6b51a CG |
130 | mdev_link->destroy_link = false; |
131 | ||
2bfde348 CG |
132 | return count; |
133 | } | |
134 | ||
1a89eb0a CG |
135 | static ssize_t mdev_link_destroy_link_store(struct config_item *item, |
136 | const char *page, size_t count) | |
137 | { | |
138 | struct mdev_link *mdev_link = to_mdev_link(item); | |
139 | bool tmp; | |
140 | int ret; | |
141 | ||
142 | ret = kstrtobool(page, &tmp); | |
143 | if (ret) | |
144 | return ret; | |
145 | if (!tmp) | |
146 | return count; | |
f9e6b51a | 147 | |
1a89eb0a CG |
148 | ret = most_remove_link(mdev_link->device, mdev_link->channel, |
149 | mdev_link->comp); | |
150 | if (ret) | |
151 | return ret; | |
152 | if (!list_empty(&mdev_link_list)) | |
153 | list_del(&mdev_link->list); | |
f9e6b51a CG |
154 | |
155 | mdev_link->destroy_link = tmp; | |
156 | ||
1a89eb0a CG |
157 | return count; |
158 | } | |
159 | ||
2bfde348 CG |
160 | static ssize_t mdev_link_direction_show(struct config_item *item, char *page) |
161 | { | |
162 | return snprintf(page, PAGE_SIZE, "%s\n", to_mdev_link(item)->direction); | |
163 | } | |
164 | ||
165 | static ssize_t mdev_link_direction_store(struct config_item *item, | |
166 | const char *page, size_t count) | |
167 | { | |
168 | struct mdev_link *mdev_link = to_mdev_link(item); | |
169 | ||
170 | if (!sysfs_streq(page, "dir_rx") && !sysfs_streq(page, "rx") && | |
171 | !sysfs_streq(page, "dir_tx") && !sysfs_streq(page, "tx")) | |
172 | return -EINVAL; | |
173 | strcpy(mdev_link->direction, page); | |
4df0991b | 174 | strim(mdev_link->direction); |
2bfde348 CG |
175 | return count; |
176 | } | |
177 | ||
178 | static ssize_t mdev_link_datatype_show(struct config_item *item, char *page) | |
179 | { | |
180 | return snprintf(page, PAGE_SIZE, "%s\n", to_mdev_link(item)->datatype); | |
181 | } | |
182 | ||
183 | static ssize_t mdev_link_datatype_store(struct config_item *item, | |
184 | const char *page, size_t count) | |
185 | { | |
186 | struct mdev_link *mdev_link = to_mdev_link(item); | |
187 | ||
188 | if (!sysfs_streq(page, "control") && !sysfs_streq(page, "async") && | |
189 | !sysfs_streq(page, "sync") && !sysfs_streq(page, "isoc") && | |
190 | !sysfs_streq(page, "isoc_avp")) | |
191 | return -EINVAL; | |
192 | strcpy(mdev_link->datatype, page); | |
4df0991b | 193 | strim(mdev_link->datatype); |
2bfde348 CG |
194 | return count; |
195 | } | |
196 | ||
197 | static ssize_t mdev_link_device_show(struct config_item *item, char *page) | |
198 | { | |
199 | return snprintf(page, PAGE_SIZE, "%s\n", to_mdev_link(item)->device); | |
200 | } | |
201 | ||
202 | static ssize_t mdev_link_device_store(struct config_item *item, | |
203 | const char *page, size_t count) | |
204 | { | |
205 | struct mdev_link *mdev_link = to_mdev_link(item); | |
206 | ||
d72f8263 | 207 | strlcpy(mdev_link->device, page, sizeof(mdev_link->device)); |
4df0991b | 208 | strim(mdev_link->device); |
2bfde348 CG |
209 | return count; |
210 | } | |
211 | ||
212 | static ssize_t mdev_link_channel_show(struct config_item *item, char *page) | |
213 | { | |
214 | return snprintf(page, PAGE_SIZE, "%s\n", to_mdev_link(item)->channel); | |
215 | } | |
216 | ||
217 | static ssize_t mdev_link_channel_store(struct config_item *item, | |
218 | const char *page, size_t count) | |
219 | { | |
220 | struct mdev_link *mdev_link = to_mdev_link(item); | |
221 | ||
d72f8263 | 222 | strlcpy(mdev_link->channel, page, sizeof(mdev_link->channel)); |
4df0991b | 223 | strim(mdev_link->channel); |
2bfde348 CG |
224 | return count; |
225 | } | |
226 | ||
227 | static ssize_t mdev_link_comp_show(struct config_item *item, char *page) | |
228 | { | |
229 | return snprintf(page, PAGE_SIZE, "%s\n", to_mdev_link(item)->comp); | |
230 | } | |
231 | ||
232 | static ssize_t mdev_link_comp_store(struct config_item *item, | |
233 | const char *page, size_t count) | |
234 | { | |
235 | struct mdev_link *mdev_link = to_mdev_link(item); | |
236 | ||
d72f8263 CG |
237 | strlcpy(mdev_link->comp, page, sizeof(mdev_link->comp)); |
238 | strim(mdev_link->comp); | |
2bfde348 CG |
239 | return count; |
240 | } | |
241 | ||
242 | static ssize_t mdev_link_comp_params_show(struct config_item *item, char *page) | |
243 | { | |
244 | return snprintf(page, PAGE_SIZE, "%s\n", | |
245 | to_mdev_link(item)->comp_params); | |
246 | } | |
247 | ||
248 | static ssize_t mdev_link_comp_params_store(struct config_item *item, | |
249 | const char *page, size_t count) | |
250 | { | |
251 | struct mdev_link *mdev_link = to_mdev_link(item); | |
252 | ||
d72f8263 CG |
253 | strlcpy(mdev_link->comp_params, page, sizeof(mdev_link->comp_params)); |
254 | strim(mdev_link->comp_params); | |
2bfde348 CG |
255 | return count; |
256 | } | |
257 | ||
258 | static ssize_t mdev_link_num_buffers_show(struct config_item *item, char *page) | |
259 | { | |
260 | return snprintf(page, PAGE_SIZE, "%d\n", | |
261 | to_mdev_link(item)->num_buffers); | |
262 | } | |
263 | ||
264 | static ssize_t mdev_link_num_buffers_store(struct config_item *item, | |
265 | const char *page, size_t count) | |
266 | { | |
267 | struct mdev_link *mdev_link = to_mdev_link(item); | |
268 | int ret; | |
269 | ||
270 | ret = kstrtou16(page, 0, &mdev_link->num_buffers); | |
271 | if (ret) | |
272 | return ret; | |
273 | return count; | |
274 | } | |
275 | ||
276 | static ssize_t mdev_link_buffer_size_show(struct config_item *item, char *page) | |
277 | { | |
278 | return snprintf(page, PAGE_SIZE, "%d\n", | |
279 | to_mdev_link(item)->buffer_size); | |
280 | } | |
281 | ||
282 | static ssize_t mdev_link_buffer_size_store(struct config_item *item, | |
283 | const char *page, size_t count) | |
284 | { | |
285 | struct mdev_link *mdev_link = to_mdev_link(item); | |
286 | int ret; | |
287 | ||
288 | ret = kstrtou16(page, 0, &mdev_link->buffer_size); | |
289 | if (ret) | |
290 | return ret; | |
291 | return count; | |
292 | } | |
293 | ||
294 | static ssize_t mdev_link_subbuffer_size_show(struct config_item *item, | |
295 | char *page) | |
296 | { | |
297 | return snprintf(page, PAGE_SIZE, "%d\n", | |
298 | to_mdev_link(item)->subbuffer_size); | |
299 | } | |
300 | ||
301 | static ssize_t mdev_link_subbuffer_size_store(struct config_item *item, | |
302 | const char *page, size_t count) | |
303 | { | |
304 | struct mdev_link *mdev_link = to_mdev_link(item); | |
305 | int ret; | |
306 | ||
307 | ret = kstrtou16(page, 0, &mdev_link->subbuffer_size); | |
308 | if (ret) | |
309 | return ret; | |
310 | return count; | |
311 | } | |
312 | ||
313 | static ssize_t mdev_link_packets_per_xact_show(struct config_item *item, | |
314 | char *page) | |
315 | { | |
316 | return snprintf(page, PAGE_SIZE, "%d\n", | |
317 | to_mdev_link(item)->packets_per_xact); | |
318 | } | |
319 | ||
320 | static ssize_t mdev_link_packets_per_xact_store(struct config_item *item, | |
321 | const char *page, size_t count) | |
322 | { | |
323 | struct mdev_link *mdev_link = to_mdev_link(item); | |
324 | int ret; | |
325 | ||
326 | ret = kstrtou16(page, 0, &mdev_link->packets_per_xact); | |
327 | if (ret) | |
328 | return ret; | |
329 | return count; | |
330 | } | |
331 | ||
332 | static ssize_t mdev_link_dbr_size_show(struct config_item *item, char *page) | |
333 | { | |
334 | return snprintf(page, PAGE_SIZE, "%d\n", to_mdev_link(item)->dbr_size); | |
335 | } | |
336 | ||
337 | static ssize_t mdev_link_dbr_size_store(struct config_item *item, | |
338 | const char *page, size_t count) | |
339 | { | |
340 | struct mdev_link *mdev_link = to_mdev_link(item); | |
341 | int ret; | |
342 | ||
343 | ret = kstrtou16(page, 0, &mdev_link->dbr_size); | |
344 | if (ret) | |
345 | return ret; | |
346 | return count; | |
347 | } | |
348 | ||
a15f465c | 349 | CONFIGFS_ATTR_WO(mdev_link_, create_link); |
1a89eb0a | 350 | CONFIGFS_ATTR_WO(mdev_link_, destroy_link); |
2bfde348 CG |
351 | CONFIGFS_ATTR(mdev_link_, device); |
352 | CONFIGFS_ATTR(mdev_link_, channel); | |
353 | CONFIGFS_ATTR(mdev_link_, comp); | |
354 | CONFIGFS_ATTR(mdev_link_, comp_params); | |
355 | CONFIGFS_ATTR(mdev_link_, num_buffers); | |
356 | CONFIGFS_ATTR(mdev_link_, buffer_size); | |
357 | CONFIGFS_ATTR(mdev_link_, subbuffer_size); | |
358 | CONFIGFS_ATTR(mdev_link_, packets_per_xact); | |
359 | CONFIGFS_ATTR(mdev_link_, datatype); | |
360 | CONFIGFS_ATTR(mdev_link_, direction); | |
361 | CONFIGFS_ATTR(mdev_link_, dbr_size); | |
362 | ||
363 | static struct configfs_attribute *mdev_link_attrs[] = { | |
364 | &mdev_link_attr_create_link, | |
1a89eb0a | 365 | &mdev_link_attr_destroy_link, |
2bfde348 CG |
366 | &mdev_link_attr_device, |
367 | &mdev_link_attr_channel, | |
368 | &mdev_link_attr_comp, | |
369 | &mdev_link_attr_comp_params, | |
370 | &mdev_link_attr_num_buffers, | |
371 | &mdev_link_attr_buffer_size, | |
372 | &mdev_link_attr_subbuffer_size, | |
373 | &mdev_link_attr_packets_per_xact, | |
374 | &mdev_link_attr_datatype, | |
375 | &mdev_link_attr_direction, | |
376 | &mdev_link_attr_dbr_size, | |
377 | NULL, | |
378 | }; | |
379 | ||
380 | static void mdev_link_release(struct config_item *item) | |
381 | { | |
1a89eb0a CG |
382 | struct mdev_link *mdev_link = to_mdev_link(item); |
383 | int ret; | |
384 | ||
f9e6b51a CG |
385 | if (mdev_link->destroy_link) |
386 | goto free_item; | |
387 | ||
388 | ret = most_remove_link(mdev_link->device, mdev_link->channel, | |
389 | mdev_link->comp); | |
390 | if (ret) { | |
391 | pr_err("Removing link failed.\n"); | |
392 | goto free_item; | |
1a89eb0a | 393 | } |
f9e6b51a CG |
394 | |
395 | if (!list_empty(&mdev_link_list)) | |
396 | list_del(&mdev_link->list); | |
397 | ||
398 | free_item: | |
2bfde348 CG |
399 | kfree(to_mdev_link(item)); |
400 | } | |
401 | ||
402 | static struct configfs_item_operations mdev_link_item_ops = { | |
403 | .release = mdev_link_release, | |
404 | }; | |
405 | ||
406 | static const struct config_item_type mdev_link_type = { | |
407 | .ct_item_ops = &mdev_link_item_ops, | |
408 | .ct_attrs = mdev_link_attrs, | |
409 | .ct_owner = THIS_MODULE, | |
410 | }; | |
411 | ||
412 | struct most_common { | |
413 | struct config_group group; | |
08283d30 | 414 | struct module *mod; |
4845b3c8 | 415 | struct configfs_subsystem subsys; |
2bfde348 CG |
416 | }; |
417 | ||
4845b3c8 | 418 | static struct most_common *to_most_common(struct configfs_subsystem *subsys) |
2bfde348 | 419 | { |
4845b3c8 | 420 | return container_of(subsys, struct most_common, subsys); |
2bfde348 CG |
421 | } |
422 | ||
423 | static struct config_item *most_common_make_item(struct config_group *group, | |
424 | const char *name) | |
425 | { | |
426 | struct mdev_link *mdev_link; | |
08283d30 | 427 | struct most_common *mc = to_most_common(group->cg_subsys); |
2bfde348 CG |
428 | |
429 | mdev_link = kzalloc(sizeof(*mdev_link), GFP_KERNEL); | |
430 | if (!mdev_link) | |
431 | return ERR_PTR(-ENOMEM); | |
432 | ||
08283d30 CG |
433 | if (!try_module_get(mc->mod)) { |
434 | kfree(mdev_link); | |
435 | return ERR_PTR(-ENOLCK); | |
436 | } | |
2bfde348 CG |
437 | config_item_init_type_name(&mdev_link->item, name, |
438 | &mdev_link_type); | |
439 | ||
440 | if (!strcmp(group->cg_item.ci_namebuf, "most_cdev")) | |
441 | strcpy(mdev_link->comp, "cdev"); | |
442 | else if (!strcmp(group->cg_item.ci_namebuf, "most_net")) | |
443 | strcpy(mdev_link->comp, "net"); | |
444 | else if (!strcmp(group->cg_item.ci_namebuf, "most_video")) | |
445 | strcpy(mdev_link->comp, "video"); | |
446 | strcpy(mdev_link->name, name); | |
447 | return &mdev_link->item; | |
448 | } | |
449 | ||
450 | static void most_common_release(struct config_item *item) | |
451 | { | |
4845b3c8 CG |
452 | struct config_group *group = to_config_group(item); |
453 | ||
454 | kfree(to_most_common(group->cg_subsys)); | |
2bfde348 CG |
455 | } |
456 | ||
457 | static struct configfs_item_operations most_common_item_ops = { | |
458 | .release = most_common_release, | |
459 | }; | |
460 | ||
08283d30 CG |
461 | static void most_common_disconnect(struct config_group *group, |
462 | struct config_item *item) | |
463 | { | |
464 | struct most_common *mc = to_most_common(group->cg_subsys); | |
465 | ||
466 | module_put(mc->mod); | |
467 | } | |
468 | ||
2bfde348 CG |
469 | static struct configfs_group_operations most_common_group_ops = { |
470 | .make_item = most_common_make_item, | |
08283d30 | 471 | .disconnect_notify = most_common_disconnect, |
2bfde348 CG |
472 | }; |
473 | ||
474 | static const struct config_item_type most_common_type = { | |
475 | .ct_item_ops = &most_common_item_ops, | |
476 | .ct_group_ops = &most_common_group_ops, | |
477 | .ct_owner = THIS_MODULE, | |
478 | }; | |
479 | ||
4845b3c8 CG |
480 | static struct most_common most_cdev = { |
481 | .subsys = { | |
482 | .su_group = { | |
483 | .cg_item = { | |
484 | .ci_namebuf = "most_cdev", | |
485 | .ci_type = &most_common_type, | |
486 | }, | |
2bfde348 CG |
487 | }, |
488 | }, | |
489 | }; | |
490 | ||
4845b3c8 CG |
491 | static struct most_common most_net = { |
492 | .subsys = { | |
493 | .su_group = { | |
494 | .cg_item = { | |
495 | .ci_namebuf = "most_net", | |
496 | .ci_type = &most_common_type, | |
497 | }, | |
2bfde348 CG |
498 | }, |
499 | }, | |
500 | }; | |
501 | ||
4845b3c8 CG |
502 | static struct most_common most_video = { |
503 | .subsys = { | |
504 | .su_group = { | |
505 | .cg_item = { | |
506 | .ci_namebuf = "most_video", | |
507 | .ci_type = &most_common_type, | |
508 | }, | |
2bfde348 CG |
509 | }, |
510 | }, | |
511 | }; | |
512 | ||
513 | struct most_snd_grp { | |
514 | struct config_group group; | |
515 | bool create_card; | |
516 | struct list_head list; | |
517 | }; | |
518 | ||
519 | static struct most_snd_grp *to_most_snd_grp(struct config_item *item) | |
520 | { | |
521 | return container_of(to_config_group(item), struct most_snd_grp, group); | |
522 | } | |
523 | ||
524 | static struct config_item *most_snd_grp_make_item(struct config_group *group, | |
525 | const char *name) | |
526 | { | |
527 | struct mdev_link *mdev_link; | |
528 | ||
529 | mdev_link = kzalloc(sizeof(*mdev_link), GFP_KERNEL); | |
530 | if (!mdev_link) | |
531 | return ERR_PTR(-ENOMEM); | |
532 | ||
533 | config_item_init_type_name(&mdev_link->item, name, &mdev_link_type); | |
c671dfda | 534 | mdev_link->create_link = false; |
2bfde348 CG |
535 | strcpy(mdev_link->name, name); |
536 | strcpy(mdev_link->comp, "sound"); | |
537 | return &mdev_link->item; | |
538 | } | |
539 | ||
2bfde348 CG |
540 | static ssize_t most_snd_grp_create_card_store(struct config_item *item, |
541 | const char *page, size_t count) | |
542 | { | |
543 | struct most_snd_grp *snd_grp = to_most_snd_grp(item); | |
544 | int ret; | |
545 | bool tmp; | |
546 | ||
547 | ret = kstrtobool(page, &tmp); | |
548 | if (ret) | |
549 | return ret; | |
550 | if (tmp) { | |
551 | ret = most_cfg_complete("sound"); | |
552 | if (ret) | |
553 | return ret; | |
554 | } | |
555 | snd_grp->create_card = tmp; | |
556 | return count; | |
557 | } | |
558 | ||
a15f465c | 559 | CONFIGFS_ATTR_WO(most_snd_grp_, create_card); |
2bfde348 CG |
560 | |
561 | static struct configfs_attribute *most_snd_grp_attrs[] = { | |
562 | &most_snd_grp_attr_create_card, | |
563 | NULL, | |
564 | }; | |
565 | ||
566 | static void most_snd_grp_release(struct config_item *item) | |
567 | { | |
568 | struct most_snd_grp *group = to_most_snd_grp(item); | |
569 | ||
570 | list_del(&group->list); | |
571 | kfree(group); | |
572 | } | |
573 | ||
574 | static struct configfs_item_operations most_snd_grp_item_ops = { | |
575 | .release = most_snd_grp_release, | |
576 | }; | |
577 | ||
578 | static struct configfs_group_operations most_snd_grp_group_ops = { | |
579 | .make_item = most_snd_grp_make_item, | |
580 | }; | |
581 | ||
582 | static const struct config_item_type most_snd_grp_type = { | |
583 | .ct_item_ops = &most_snd_grp_item_ops, | |
584 | .ct_group_ops = &most_snd_grp_group_ops, | |
585 | .ct_attrs = most_snd_grp_attrs, | |
586 | .ct_owner = THIS_MODULE, | |
587 | }; | |
588 | ||
589 | struct most_sound { | |
590 | struct configfs_subsystem subsys; | |
591 | struct list_head soundcard_list; | |
08283d30 | 592 | struct module *mod; |
2bfde348 CG |
593 | }; |
594 | ||
595 | static struct config_group *most_sound_make_group(struct config_group *group, | |
596 | const char *name) | |
597 | { | |
598 | struct most_snd_grp *most; | |
08283d30 | 599 | struct most_sound *ms = container_of(group->cg_subsys, |
2bfde348 CG |
600 | struct most_sound, subsys); |
601 | ||
602 | list_for_each_entry(most, &ms->soundcard_list, list) { | |
603 | if (!most->create_card) { | |
604 | pr_info("adapter configuration still in progress.\n"); | |
605 | return ERR_PTR(-EPROTO); | |
606 | } | |
607 | } | |
08283d30 CG |
608 | if (!try_module_get(ms->mod)) |
609 | return ERR_PTR(-ENOLCK); | |
2bfde348 | 610 | most = kzalloc(sizeof(*most), GFP_KERNEL); |
08283d30 CG |
611 | if (!most) { |
612 | module_put(ms->mod); | |
2bfde348 | 613 | return ERR_PTR(-ENOMEM); |
08283d30 | 614 | } |
2bfde348 CG |
615 | config_group_init_type_name(&most->group, name, &most_snd_grp_type); |
616 | list_add_tail(&most->list, &ms->soundcard_list); | |
617 | return &most->group; | |
618 | } | |
619 | ||
08283d30 CG |
620 | static void most_sound_disconnect(struct config_group *group, |
621 | struct config_item *item) | |
622 | { | |
623 | struct most_sound *ms = container_of(group->cg_subsys, | |
624 | struct most_sound, subsys); | |
625 | module_put(ms->mod); | |
626 | } | |
627 | ||
2bfde348 CG |
628 | static struct configfs_group_operations most_sound_group_ops = { |
629 | .make_group = most_sound_make_group, | |
08283d30 | 630 | .disconnect_notify = most_sound_disconnect, |
2bfde348 CG |
631 | }; |
632 | ||
633 | static const struct config_item_type most_sound_type = { | |
634 | .ct_group_ops = &most_sound_group_ops, | |
635 | .ct_owner = THIS_MODULE, | |
636 | }; | |
637 | ||
638 | static struct most_sound most_sound_subsys = { | |
639 | .subsys = { | |
640 | .su_group = { | |
641 | .cg_item = { | |
642 | .ci_namebuf = "most_sound", | |
643 | .ci_type = &most_sound_type, | |
644 | }, | |
645 | }, | |
646 | }, | |
647 | }; | |
648 | ||
45917e79 | 649 | int most_register_configfs_subsys(struct most_component *c) |
2bfde348 CG |
650 | { |
651 | int ret; | |
652 | ||
4845b3c8 | 653 | if (!strcmp(c->name, "cdev")) { |
08283d30 | 654 | most_cdev.mod = c->mod; |
4845b3c8 CG |
655 | ret = configfs_register_subsystem(&most_cdev.subsys); |
656 | } else if (!strcmp(c->name, "net")) { | |
08283d30 | 657 | most_net.mod = c->mod; |
4845b3c8 CG |
658 | ret = configfs_register_subsystem(&most_net.subsys); |
659 | } else if (!strcmp(c->name, "video")) { | |
08283d30 | 660 | most_video.mod = c->mod; |
4845b3c8 CG |
661 | ret = configfs_register_subsystem(&most_video.subsys); |
662 | } else if (!strcmp(c->name, "sound")) { | |
08283d30 | 663 | most_sound_subsys.mod = c->mod; |
2bfde348 | 664 | ret = configfs_register_subsystem(&most_sound_subsys.subsys); |
4845b3c8 | 665 | } else { |
2bfde348 | 666 | return -ENODEV; |
4845b3c8 | 667 | } |
2bfde348 CG |
668 | |
669 | if (ret) { | |
670 | pr_err("Error %d while registering subsystem %s\n", | |
671 | ret, c->name); | |
672 | } | |
673 | return ret; | |
674 | } | |
675 | EXPORT_SYMBOL_GPL(most_register_configfs_subsys); | |
676 | ||
acdbb897 CG |
677 | void most_interface_register_notify(const char *mdev) |
678 | { | |
679 | bool register_snd_card = false; | |
680 | struct mdev_link *mdev_link; | |
681 | ||
682 | list_for_each_entry(mdev_link, &mdev_link_list, list) { | |
683 | if (!strcmp(mdev_link->device, mdev)) { | |
684 | set_config_and_add_link(mdev_link); | |
685 | if (!strcmp(mdev_link->comp, "sound")) | |
686 | register_snd_card = true; | |
687 | } | |
688 | } | |
689 | if (register_snd_card) | |
690 | most_cfg_complete("sound"); | |
691 | } | |
692 | ||
45917e79 | 693 | void most_deregister_configfs_subsys(struct most_component *c) |
2bfde348 CG |
694 | { |
695 | if (!strcmp(c->name, "cdev")) | |
4845b3c8 | 696 | configfs_unregister_subsystem(&most_cdev.subsys); |
2bfde348 | 697 | else if (!strcmp(c->name, "net")) |
4845b3c8 | 698 | configfs_unregister_subsystem(&most_net.subsys); |
2bfde348 | 699 | else if (!strcmp(c->name, "video")) |
4845b3c8 | 700 | configfs_unregister_subsystem(&most_video.subsys); |
2bfde348 CG |
701 | else if (!strcmp(c->name, "sound")) |
702 | configfs_unregister_subsystem(&most_sound_subsys.subsys); | |
703 | } | |
704 | EXPORT_SYMBOL_GPL(most_deregister_configfs_subsys); | |
705 | ||
706 | int __init configfs_init(void) | |
707 | { | |
4845b3c8 CG |
708 | config_group_init(&most_cdev.subsys.su_group); |
709 | mutex_init(&most_cdev.subsys.su_mutex); | |
2bfde348 | 710 | |
4845b3c8 CG |
711 | config_group_init(&most_net.subsys.su_group); |
712 | mutex_init(&most_net.subsys.su_mutex); | |
2bfde348 | 713 | |
4845b3c8 CG |
714 | config_group_init(&most_video.subsys.su_group); |
715 | mutex_init(&most_video.subsys.su_mutex); | |
2bfde348 CG |
716 | |
717 | config_group_init(&most_sound_subsys.subsys.su_group); | |
718 | mutex_init(&most_sound_subsys.subsys.su_mutex); | |
719 | ||
720 | INIT_LIST_HEAD(&most_sound_subsys.soundcard_list); | |
acdbb897 | 721 | INIT_LIST_HEAD(&mdev_link_list); |
2bfde348 CG |
722 | |
723 | return 0; | |
724 | } |