1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * sysfs interface for HD-audio codec
4 *
5 * Copyright (c) 2014 Takashi Iwai <tiwai@suse.de>
6 *
7 * split from hda_hwdep.c
8 */
9
10 #include <linux/init.h>
11 #include <linux/slab.h>
12 #include <linux/compat.h>
13 #include <linux/mutex.h>
14 #include <linux/ctype.h>
15 #include <linux/string.h>
16 #include <linux/export.h>
17 #include <sound/core.h>
18 #include <sound/hda_codec.h>
19 #include "hda_local.h"
20 #include <sound/hda_hwdep.h>
21 #include <sound/minors.h>
22
23 /* hint string pair */
24 struct hda_hint {
25 const char *key;
26 const char *val; /* contained in the same alloc as key */
27 };
28
29 static ssize_t power_on_acct_show(struct device *dev,
30 struct device_attribute *attr,
31 char *buf)
32 {
33 struct hda_codec *codec = dev_get_drvdata(dev);
34 snd_hda_update_power_acct(codec);
35 return sysfs_emit(buf, "%u\n", jiffies_to_msecs(codec->power_on_acct));
36 }
37
38 static ssize_t power_off_acct_show(struct device *dev,
39 struct device_attribute *attr,
40 char *buf)
41 {
42 struct hda_codec *codec = dev_get_drvdata(dev);
43 snd_hda_update_power_acct(codec);
44 return sysfs_emit(buf, "%u\n", jiffies_to_msecs(codec->power_off_acct));
45 }
46
47 static DEVICE_ATTR_RO(power_on_acct);
48 static DEVICE_ATTR_RO(power_off_acct);
49
50 #define CODEC_INFO_SHOW(type, field) \
51 static ssize_t type##_show(struct device *dev, \
52 struct device_attribute *attr, \
53 char *buf) \
54 { \
55 struct hda_codec *codec = dev_get_drvdata(dev); \
56 return sysfs_emit(buf, "0x%x\n", codec->field); \
57 }
58
59 #define CODEC_INFO_STR_SHOW(type, field) \
60 static ssize_t type##_show(struct device *dev, \
61 struct device_attribute *attr, \
62 char *buf) \
63 { \
64 struct hda_codec *codec = dev_get_drvdata(dev); \
65 return sysfs_emit(buf, "%s\n", \
66 codec->field ? codec->field : ""); \
67 }
68
69 CODEC_INFO_SHOW(vendor_id, core.vendor_id);
70 CODEC_INFO_SHOW(subsystem_id, core.subsystem_id);
71 CODEC_INFO_SHOW(revision_id, core.revision_id);
72 CODEC_INFO_SHOW(afg, core.afg);
73 CODEC_INFO_SHOW(mfg, core.mfg);
74 CODEC_INFO_STR_SHOW(vendor_name, core.vendor_name);
75 CODEC_INFO_STR_SHOW(chip_name, core.chip_name);
76 CODEC_INFO_STR_SHOW(modelname, modelname);
77
78 static ssize_t pin_configs_show(struct hda_codec *codec,
79 struct snd_array *list,
80 char *buf)
81 {
82 const struct hda_pincfg *pin;
83 int i, len = 0;
84 mutex_lock(&codec->user_mutex);
85 snd_array_for_each(list, i, pin) {
86 len += sysfs_emit_at(buf, len, "0x%02x 0x%08x\n",
87 pin->nid, pin->cfg);
88 }
89 mutex_unlock(&codec->user_mutex);
90 return len;
91 }
92
93 static ssize_t init_pin_configs_show(struct device *dev,
94 struct device_attribute *attr,
95 char *buf)
96 {
97 struct hda_codec *codec = dev_get_drvdata(dev);
98 return pin_configs_show(codec, &codec->init_pins, buf);
99 }
100
101 static ssize_t driver_pin_configs_show(struct device *dev,
102 struct device_attribute *attr,
103 char *buf)
104 {
105 struct hda_codec *codec = dev_get_drvdata(dev);
106 return pin_configs_show(codec, &codec->driver_pins, buf);
107 }
108
109 #ifdef CONFIG_SND_HDA_RECONFIG
110
111 /*
112 * sysfs interface
113 */
114
115 static int clear_codec(struct hda_codec *codec)
116 {
117 int err;
118
119 err = snd_hda_codec_reset(codec);
120 if (err < 0) {
121 codec_err(codec, "The codec is being used, can't free.\n");
122 return err;
123 }
124 snd_hda_sysfs_clear(codec);
125 return 0;
126 }
127
128 static int reconfig_codec(struct hda_codec *codec)
129 {
130 int err;
131
132 snd_hda_power_up(codec);
133 codec_info(codec, "hda-codec: reconfiguring\n");
134 err = snd_hda_codec_reset(codec);
135 if (err < 0) {
136 codec_err(codec,
137 "The codec is being used, can't reconfigure.\n");
138 goto error;
139 }
140 err = device_reprobe(hda_codec_dev(codec));
141 if (err < 0)
142 goto error;
143 err = snd_card_register(codec->card);
144 error:
145 snd_hda_power_down(codec);
146 return err;
147 }
148
149 /*
150 * allocate a string at most len chars, and remove the trailing EOL
151 */
152 static char *kstrndup_noeol(const char *src, size_t len)
153 {
154 char *s = kstrndup(src, len, GFP_KERNEL);
155 char *p;
156 if (!s)
157 return NULL;
158 p = strchr(s, '\n');
159 if (p)
160 *p = 0;
161 return s;
162 }
163
164 #define CODEC_INFO_STORE(type, field) \
165 static ssize_t type##_store(struct device *dev, \
166 struct device_attribute *attr, \
167 const char *buf, size_t count) \
168 { \
169 struct hda_codec *codec = dev_get_drvdata(dev); \
170 unsigned long val; \
171 int err = kstrtoul(buf, 0, &val); \
172 if (err < 0) \
173 return err; \
174 codec->field = val; \
175 return count; \
176 }
177
178 #define CODEC_INFO_STR_STORE(type, field) \
179 static ssize_t type##_store(struct device *dev, \
180 struct device_attribute *attr, \
181 const char *buf, size_t count) \
182 { \
183 struct hda_codec *codec = dev_get_drvdata(dev); \
184 char *s = kstrndup_noeol(buf, 64); \
185 if (!s) \
186 return -ENOMEM; \
187 kfree(codec->field); \
188 codec->field = s; \
189 return count; \
190 }
191
192 CODEC_INFO_STORE(vendor_id, core.vendor_id);
193 CODEC_INFO_STORE(subsystem_id, core.subsystem_id);
194 CODEC_INFO_STORE(revision_id, core.revision_id);
195 CODEC_INFO_STR_STORE(vendor_name, core.vendor_name);
196 CODEC_INFO_STR_STORE(chip_name, core.chip_name);
197 CODEC_INFO_STR_STORE(modelname, modelname);
198
199 #define CODEC_ACTION_STORE(type) \
200 static ssize_t type##_store(struct device *dev, \
201 struct device_attribute *attr, \
202 const char *buf, size_t count) \
203 { \
204 struct hda_codec *codec = dev_get_drvdata(dev); \
205 int err = 0; \
206 if (*buf) \
207 err = type##_codec(codec); \
208 return err < 0 ? err : count; \
209 }
210
211 CODEC_ACTION_STORE(reconfig);
212 CODEC_ACTION_STORE(clear);
213
214 static ssize_t init_verbs_show(struct device *dev,
215 struct device_attribute *attr,
216 char *buf)
217 {
218 struct hda_codec *codec = dev_get_drvdata(dev);
219 const struct hda_verb *v;
220 int i, len = 0;
221 mutex_lock(&codec->user_mutex);
222 snd_array_for_each(&codec->init_verbs, i, v) {
223 len += sysfs_emit_at(buf, len, "0x%02x 0x%03x 0x%04x\n",
224 v->nid, v->verb, v->param);
225 }
226 mutex_unlock(&codec->user_mutex);
227 return len;
228 }
229
230 static int parse_init_verbs(struct hda_codec *codec, const char *buf)
231 {
232 struct hda_verb *v;
233 int nid, verb, param;
234
235 if (sscanf(buf, "%i %i %i", &nid, &verb, ¶m) != 3)
236 return -EINVAL;
237 if (!nid || !verb)
238 return -EINVAL;
239 mutex_lock(&codec->user_mutex);
240 v = snd_array_new(&codec->init_verbs);
241 if (!v) {
242 mutex_unlock(&codec->user_mutex);
243 return -ENOMEM;
244 }
245 v->nid = nid;
246 v->verb = verb;
247 v->param = param;
248 mutex_unlock(&codec->user_mutex);
249 return 0;
250 }
251
252 static ssize_t init_verbs_store(struct device *dev,
253 struct device_attribute *attr,
254 const char *buf, size_t count)
255 {
256 struct hda_codec *codec = dev_get_drvdata(dev);
257 int err = parse_init_verbs(codec, buf);
258 if (err < 0)
259 return err;
260 return count;
261 }
262
263 static ssize_t hints_show(struct device *dev,
264 struct device_attribute *attr,
265 char *buf)
266 {
267 struct hda_codec *codec = dev_get_drvdata(dev);
268 const struct hda_hint *hint;
269 int i, len = 0;
270 mutex_lock(&codec->user_mutex);
271 snd_array_for_each(&codec->hints, i, hint) {
272 len += sysfs_emit_at(buf, len, "%s = %s\n",
273 hint->key, hint->val);
274 }
275 mutex_unlock(&codec->user_mutex);
276 return len;
277 }
278
279 static struct hda_hint *get_hint(struct hda_codec *codec, const char *key)
280 {
281 struct hda_hint *hint;
282 int i;
283
284 snd_array_for_each(&codec->hints, i, hint) {
285 if (!strcmp(hint->key, key))
286 return hint;
287 }
288 return NULL;
289 }
290
291 static void remove_trail_spaces(char *str)
292 {
293 char *p;
294 if (!*str)
295 return;
296 p = str + strlen(str) - 1;
297 for (; isspace(*p); p--) {
298 *p = 0;
299 if (p == str)
300 return;
301 }
302 }
303
304 #define MAX_HINTS 1024
305
306 static int parse_hints(struct hda_codec *codec, const char *buf)
307 {
308 char *key, *val;
309 struct hda_hint *hint;
310 int err = 0;
311
312 buf = skip_spaces(buf);
313 if (!*buf || *buf == '#' || *buf == '\n')
314 return 0;
315 if (*buf == '=')
316 return -EINVAL;
317 key = kstrndup_noeol(buf, 1024);
318 if (!key)
319 return -ENOMEM;
320 /* extract key and val */
321 val = strchr(key, '=');
322 if (!val) {
323 kfree(key);
324 return -EINVAL;
325 }
326 *val++ = 0;
327 val = skip_spaces(val);
328 remove_trail_spaces(key);
329 remove_trail_spaces(val);
330 mutex_lock(&codec->user_mutex);
331 hint = get_hint(codec, key);
332 if (hint) {
333 /* replace */
334 kfree(hint->key);
335 hint->key = key;
336 hint->val = val;
337 goto unlock;
338 }
339 /* allocate a new hint entry */
340 if (codec->hints.used >= MAX_HINTS)
341 hint = NULL;
342 else
343 hint = snd_array_new(&codec->hints);
344 if (hint) {
345 hint->key = key;
346 hint->val = val;
347 } else {
348 err = -ENOMEM;
349 }
350 unlock:
351 mutex_unlock(&codec->user_mutex);
352 if (err)
353 kfree(key);
354 return err;
355 }
356
357 static ssize_t hints_store(struct device *dev,
358 struct device_attribute *attr,
359 const char *buf, size_t count)
360 {
361 struct hda_codec *codec = dev_get_drvdata(dev);
362 int err = parse_hints(codec, buf);
363 if (err < 0)
364 return err;
365 return count;
366 }
367
368 static ssize_t user_pin_configs_show(struct device *dev,
369 struct device_attribute *attr,
370 char *buf)
371 {
372 struct hda_codec *codec = dev_get_drvdata(dev);
373 return pin_configs_show(codec, &codec->user_pins, buf);
374 }
375
376 static int parse_user_pin_configs(struct hda_codec *codec, const char *buf)
377 {
378 int nid, cfg, err;
379
380 if (sscanf(buf, "%i %i", &nid, &cfg) != 2)
381 return -EINVAL;
382 if (!nid)
383 return -EINVAL;
384 mutex_lock(&codec->user_mutex);
385 err = snd_hda_add_pincfg(codec, &codec->user_pins, nid, cfg);
386 mutex_unlock(&codec->user_mutex);
387 return err;
388 }
389
390 static ssize_t user_pin_configs_store(struct device *dev,
391 struct device_attribute *attr,
392 const char *buf, size_t count)
393 {
394 struct hda_codec *codec = dev_get_drvdata(dev);
395 int err = parse_user_pin_configs(codec, buf);
396 if (err < 0)
397 return err;
398 return count;
399 }
400
401 /* sysfs attributes exposed only when CONFIG_SND_HDA_RECONFIG=y */
402 static DEVICE_ATTR_RW(init_verbs);
403 static DEVICE_ATTR_RW(hints);
404 static DEVICE_ATTR_RW(user_pin_configs);
405 static DEVICE_ATTR_WO(reconfig);
406 static DEVICE_ATTR_WO(clear);
407
408 /**
409 * snd_hda_get_hint - Look for hint string
410 * @codec: the HDA codec
411 * @key: the hint key string
412 *
413 * Look for a hint key/value pair matching with the given key string
414 * and returns the value string. If nothing found, returns NULL.
415 */
416 const char *snd_hda_get_hint(struct hda_codec *codec, const char *key)
417 {
418 struct hda_hint *hint = get_hint(codec, key);
419 return hint ? hint->val : NULL;
420 }
421 EXPORT_SYMBOL_GPL(snd_hda_get_hint);
422
423 /**
424 * snd_hda_get_bool_hint - Get a boolean hint value
425 * @codec: the HDA codec
426 * @key: the hint key string
427 *
428 * Look for a hint key/value pair matching with the given key string
429 * and returns a boolean value parsed from the value. If no matching
430 * key is found, return a negative value.
431 */
432 int snd_hda_get_bool_hint(struct hda_codec *codec, const char *key)
433 {
434 const char *p;
435 int ret;
436
437 mutex_lock(&codec->user_mutex);
438 p = snd_hda_get_hint(codec, key);
439 if (!p || !*p)
440 ret = -ENOENT;
441 else {
442 switch (toupper(*p)) {
443 case 'T': /* true */
444 case 'Y': /* yes */
445 case '1':
446 ret = 1;
447 break;
448 default:
449 ret = 0;
450 break;
451 }
452 }
453 mutex_unlock(&codec->user_mutex);
454 return ret;
455 }
456 EXPORT_SYMBOL_GPL(snd_hda_get_bool_hint);
457
458 /**
459 * snd_hda_get_int_hint - Get an integer hint value
460 * @codec: the HDA codec
461 * @key: the hint key string
462 * @valp: pointer to store a value
463 *
464 * Look for a hint key/value pair matching with the given key string
465 * and stores the integer value to @valp. If no matching key is found,
466 * return a negative error code. Otherwise it returns zero.
467 */
468 int snd_hda_get_int_hint(struct hda_codec *codec, const char *key, int *valp)
469 {
470 const char *p;
471 unsigned long val;
472 int ret;
473
474 mutex_lock(&codec->user_mutex);
475 p = snd_hda_get_hint(codec, key);
476 if (!p)
477 ret = -ENOENT;
478 else if (kstrtoul(p, 0, &val))
479 ret = -EINVAL;
480 else {
481 *valp = val;
482 ret = 0;
483 }
484 mutex_unlock(&codec->user_mutex);
485 return ret;
486 }
487 EXPORT_SYMBOL_GPL(snd_hda_get_int_hint);
488 #endif /* CONFIG_SND_HDA_RECONFIG */
489
490 /*
491 * common sysfs attributes
492 */
493 #ifdef CONFIG_SND_HDA_RECONFIG
494 #define RECONFIG_DEVICE_ATTR(name) DEVICE_ATTR_RW(name)
495 #else
496 #define RECONFIG_DEVICE_ATTR(name) DEVICE_ATTR_RO(name)
497 #endif
498 static RECONFIG_DEVICE_ATTR(vendor_id);
499 static RECONFIG_DEVICE_ATTR(subsystem_id);
500 static RECONFIG_DEVICE_ATTR(revision_id);
501 static DEVICE_ATTR_RO(afg);
502 static DEVICE_ATTR_RO(mfg);
503 static RECONFIG_DEVICE_ATTR(vendor_name);
504 static RECONFIG_DEVICE_ATTR(chip_name);
505 static RECONFIG_DEVICE_ATTR(modelname);
506 static DEVICE_ATTR_RO(init_pin_configs);
507 static DEVICE_ATTR_RO(driver_pin_configs);
508
509
510 #ifdef CONFIG_SND_HDA_PATCH_LOADER
511
512 /* parser mode */
513 enum {
514 LINE_MODE_NONE,
515 LINE_MODE_CODEC,
516 LINE_MODE_MODEL,
517 LINE_MODE_PINCFG,
518 LINE_MODE_VERB,
519 LINE_MODE_HINT,
520 LINE_MODE_VENDOR_ID,
521 LINE_MODE_SUBSYSTEM_ID,
522 LINE_MODE_REVISION_ID,
523 LINE_MODE_CHIP_NAME,
524 NUM_LINE_MODES,
525 };
526
527 static inline int strmatch(const char *a, const char *b)
528 {
529 return strncasecmp(a, b, strlen(b)) == 0;
530 }
531
532 /* parse the contents after the line "[codec]"
533 * accept only the line with three numbers, and assign the current codec
534 */
535 static void parse_codec_mode(char *buf, struct hda_bus *bus,
536 struct hda_codec **codecp)
537 {
538 int vendorid, subid, caddr;
539 struct hda_codec *codec;
540
541 *codecp = NULL;
542 if (sscanf(buf, "%i %i %i", &vendorid, &subid, &caddr) == 3) {
543 list_for_each_codec(codec, bus) {
544 if ((vendorid <= 0 || codec->core.vendor_id == vendorid) &&
545 (subid <= 0 || codec->core.subsystem_id == subid) &&
546 codec->core.addr == caddr) {
547 *codecp = codec;
548 break;
549 }
550 }
551 }
552 }
553
554 /* parse the contents after the other command tags, [pincfg], [verb],
555 * [vendor_id], [subsystem_id], [revision_id], [chip_name], [hint] and [model]
556 * just pass to the sysfs helper (only when any codec was specified)
557 */
558 static void parse_pincfg_mode(char *buf, struct hda_bus *bus,
559 struct hda_codec **codecp)
560 {
561 parse_user_pin_configs(*codecp, buf);
562 }
563
564 static void parse_verb_mode(char *buf, struct hda_bus *bus,
565 struct hda_codec **codecp)
566 {
567 parse_init_verbs(*codecp, buf);
568 }
569
570 static void parse_hint_mode(char *buf, struct hda_bus *bus,
571 struct hda_codec **codecp)
572 {
573 parse_hints(*codecp, buf);
574 }
575
576 static void parse_model_mode(char *buf, struct hda_bus *bus,
577 struct hda_codec **codecp)
578 {
579 kfree((*codecp)->modelname);
580 (*codecp)->modelname = kstrdup(buf, GFP_KERNEL);
581 }
582
583 static void parse_chip_name_mode(char *buf, struct hda_bus *bus,
584 struct hda_codec **codecp)
585 {
586 snd_hda_codec_set_name(*codecp, buf);
587 }
588
589 #define DEFINE_PARSE_ID_MODE(name) \
590 static void parse_##name##_mode(char *buf, struct hda_bus *bus, \
591 struct hda_codec **codecp) \
592 { \
593 unsigned long val; \
594 if (!kstrtoul(buf, 0, &val)) \
595 (*codecp)->core.name = val; \
596 }
597
598 DEFINE_PARSE_ID_MODE(vendor_id);
599 DEFINE_PARSE_ID_MODE(subsystem_id);
600 DEFINE_PARSE_ID_MODE(revision_id);
601
602
603 struct hda_patch_item {
604 const char *tag;
605 const char *alias;
606 void (*parser)(char *buf, struct hda_bus *bus, struct hda_codec **retc);
607 };
608
609 static const struct hda_patch_item patch_items[NUM_LINE_MODES] = {
610 [LINE_MODE_CODEC] = {
611 .tag = "[codec]",
612 .parser = parse_codec_mode,
613 },
614 [LINE_MODE_MODEL] = {
615 .tag = "[model]",
616 .parser = parse_model_mode,
617 },
618 [LINE_MODE_VERB] = {
619 .tag = "[verb]",
620 .alias = "[init_verbs]",
621 .parser = parse_verb_mode,
622 },
623 [LINE_MODE_PINCFG] = {
624 .tag = "[pincfg]",
625 .alias = "[user_pin_configs]",
626 .parser = parse_pincfg_mode,
627 },
628 [LINE_MODE_HINT] = {
629 .tag = "[hint]",
630 .alias = "[hints]",
631 .parser = parse_hint_mode
632 },
633 [LINE_MODE_VENDOR_ID] = {
634 .tag = "[vendor_id]",
635 .parser = parse_vendor_id_mode,
636 },
637 [LINE_MODE_SUBSYSTEM_ID] = {
638 .tag = "[subsystem_id]",
639 .parser = parse_subsystem_id_mode,
640 },
641 [LINE_MODE_REVISION_ID] = {
642 .tag = "[revision_id]",
643 .parser = parse_revision_id_mode,
644 },
645 [LINE_MODE_CHIP_NAME] = {
646 .tag = "[chip_name]",
647 .parser = parse_chip_name_mode,
648 },
649 };
650
651 /* check the line starting with '[' -- change the parser mode accodingly */
652 static int parse_line_mode(char *buf, struct hda_bus *bus)
653 {
654 int i;
655 for (i = 0; i < ARRAY_SIZE(patch_items); i++) {
656 if (!patch_items[i].tag)
657 continue;
658 if (strmatch(buf, patch_items[i].tag))
659 return i;
660 if (patch_items[i].alias && strmatch(buf, patch_items[i].alias))
661 return i;
662 }
663 return LINE_MODE_NONE;
664 }
665
666 /* copy one line from the buffer in fw, and update the fields in fw
667 * return zero if it reaches to the end of the buffer, or non-zero
668 * if successfully copied a line
669 *
670 * the spaces at the beginning and the end of the line are stripped
671 */
672 static int get_line_from_fw(char *buf, int size, size_t *fw_size_p,
673 const void **fw_data_p)
674 {
675 int len;
676 size_t fw_size = *fw_size_p;
677 const char *p = *fw_data_p;
678
679 while (isspace(*p) && fw_size) {
680 p++;
681 fw_size--;
682 }
683 if (!fw_size)
684 return 0;
685
686 for (len = 0; len < fw_size; len++) {
687 if (!*p)
688 break;
689 if (*p == '\n') {
690 p++;
691 len++;
692 break;
693 }
694 if (len < size)
695 *buf++ = *p++;
696 }
697 *buf = 0;
698 *fw_size_p = fw_size - len;
699 *fw_data_p = p;
700 remove_trail_spaces(buf);
701 return 1;
702 }
703
704 /**
705 * snd_hda_load_patch - load a "patch" firmware file and parse it
706 * @bus: HD-audio bus
707 * @fw_size: the firmware byte size
708 * @fw_buf: the firmware data
709 */
710 int snd_hda_load_patch(struct hda_bus *bus, size_t fw_size, const void *fw_buf)
711 {
712 char buf[128];
713 struct hda_codec *codec;
714 int line_mode;
715
716 line_mode = LINE_MODE_NONE;
717 codec = NULL;
718 while (get_line_from_fw(buf, sizeof(buf) - 1, &fw_size, &fw_buf)) {
719 if (!*buf || *buf == '#' || *buf == '\n')
720 continue;
721 if (*buf == '[')
722 line_mode = parse_line_mode(buf, bus);
723 else if (patch_items[line_mode].parser &&
724 (codec || line_mode <= LINE_MODE_CODEC))
725 patch_items[line_mode].parser(buf, bus, &codec);
726 }
727 return 0;
728 }
729 EXPORT_SYMBOL_GPL(snd_hda_load_patch);
730 #endif /* CONFIG_SND_HDA_PATCH_LOADER */
731
732 /*
733 * sysfs entries
734 */
735 static struct attribute *hda_dev_attrs[] = {
736 &dev_attr_vendor_id.attr,
737 &dev_attr_subsystem_id.attr,
738 &dev_attr_revision_id.attr,
739 &dev_attr_afg.attr,
740 &dev_attr_mfg.attr,
741 &dev_attr_vendor_name.attr,
742 &dev_attr_chip_name.attr,
743 &dev_attr_modelname.attr,
744 &dev_attr_init_pin_configs.attr,
745 &dev_attr_driver_pin_configs.attr,
746 &dev_attr_power_on_acct.attr,
747 &dev_attr_power_off_acct.attr,
748 #ifdef CONFIG_SND_HDA_RECONFIG
749 &dev_attr_init_verbs.attr,
750 &dev_attr_hints.attr,
751 &dev_attr_user_pin_configs.attr,
752 &dev_attr_reconfig.attr,
753 &dev_attr_clear.attr,
754 #endif
755 NULL
756 };
757
758 static const struct attribute_group hda_dev_attr_group = {
759 .attrs = hda_dev_attrs,
760 };
761
762 const struct attribute_group *snd_hda_dev_attr_groups[] = {
763 &hda_dev_attr_group,
764 NULL
765 };
766
767 void snd_hda_sysfs_init(struct hda_codec *codec)
768 {
769 mutex_init(&codec->user_mutex);
770 #ifdef CONFIG_SND_HDA_RECONFIG
771 snd_array_init(&codec->init_verbs, sizeof(struct hda_verb), 32);
772 snd_array_init(&codec->hints, sizeof(struct hda_hint), 32);
773 snd_array_init(&codec->user_pins, sizeof(struct hda_pincfg), 16);
774 #endif
775 }
776
777 void snd_hda_sysfs_clear(struct hda_codec *codec)
778 {
779 #ifdef CONFIG_SND_HDA_RECONFIG
780 struct hda_hint *hint;
781 int i;
782
783 /* clear init verbs */
784 snd_array_free(&codec->init_verbs);
785 /* clear hints */
786 snd_array_for_each(&codec->hints, i, hint) {
787 kfree(hint->key); /* we don't need to free hint->val */
788 }
789 snd_array_free(&codec->hints);
790 snd_array_free(&codec->user_pins);
791 #endif
792 }
793
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