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