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 */
23 struct hda_hint {
24 const char *key;
25 const char *val; /* contained in the same alloc as key */
26 };
27
28 #ifdef CONFIG_PM
power_on_acct_show(struct device * dev,struct device_attribute * attr,char * buf)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 sprintf(buf, "%u\n", jiffies_to_msecs(codec->power_on_acct));
36 }
37
power_off_acct_show(struct device * dev,struct device_attribute * attr,char * buf)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 sprintf(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 #endif /* CONFIG_PM */
50
51 #define CODEC_INFO_SHOW(type) \
52 static 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) \
61 static 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
70 CODEC_INFO_SHOW(vendor_id);
71 CODEC_INFO_SHOW(subsystem_id);
72 CODEC_INFO_SHOW(revision_id);
73 CODEC_INFO_SHOW(afg);
74 CODEC_INFO_SHOW(mfg);
75 CODEC_INFO_STR_SHOW(vendor_name);
76 CODEC_INFO_STR_SHOW(chip_name);
77 CODEC_INFO_STR_SHOW(modelname);
78
pin_configs_show(struct hda_codec * codec,struct snd_array * list,char * buf)79 static 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
init_pin_configs_show(struct device * dev,struct device_attribute * attr,char * buf)94 static 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
driver_pin_configs_show(struct device * dev,struct device_attribute * attr,char * buf)102 static 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
clear_codec(struct hda_codec * codec)116 static 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
reconfig_codec(struct hda_codec * codec)129 static 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 */
kstrndup_noeol(const char * src,size_t len)161 static 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) \
174 static 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) \
188 static 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
201 CODEC_INFO_STORE(vendor_id);
202 CODEC_INFO_STORE(subsystem_id);
203 CODEC_INFO_STORE(revision_id);
204 CODEC_INFO_STR_STORE(vendor_name);
205 CODEC_INFO_STR_STORE(chip_name);
206 CODEC_INFO_STR_STORE(modelname);
207
208 #define CODEC_ACTION_STORE(type) \
209 static 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
220 CODEC_ACTION_STORE(reconfig);
221 CODEC_ACTION_STORE(clear);
222
init_verbs_show(struct device * dev,struct device_attribute * attr,char * buf)223 static 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
parse_init_verbs(struct hda_codec * codec,const char * buf)240 static 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
init_verbs_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)262 static 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
hints_show(struct device * dev,struct device_attribute * attr,char * buf)273 static 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
get_hint(struct hda_codec * codec,const char * key)289 static 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
remove_trail_spaces(char * str)301 static 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
parse_hints(struct hda_codec * codec,const char * buf)316 static 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
hints_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)367 static 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
user_pin_configs_show(struct device * dev,struct device_attribute * attr,char * buf)378 static 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
parse_user_pin_configs(struct hda_codec * codec,const char * buf)388 static 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
user_pin_configs_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)402 static 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 */
414 static DEVICE_ATTR_RW(init_verbs);
415 static DEVICE_ATTR_RW(hints);
416 static DEVICE_ATTR_RW(user_pin_configs);
417 static DEVICE_ATTR_WO(reconfig);
418 static DEVICE_ATTR_WO(clear);
419
420 /*
421 * Look for hint string
422 */
snd_hda_get_hint(struct hda_codec * codec,const char * key)423 const 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 }
428 EXPORT_SYMBOL_GPL(snd_hda_get_hint);
429
snd_hda_get_bool_hint(struct hda_codec * codec,const char * key)430 int 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 }
454 EXPORT_SYMBOL_GPL(snd_hda_get_bool_hint);
455
snd_hda_get_int_hint(struct hda_codec * codec,const char * key,int * valp)456 int 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 }
475 EXPORT_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
486 static RECONFIG_DEVICE_ATTR(vendor_id);
487 static RECONFIG_DEVICE_ATTR(subsystem_id);
488 static RECONFIG_DEVICE_ATTR(revision_id);
489 static DEVICE_ATTR_RO(afg);
490 static DEVICE_ATTR_RO(mfg);
491 static RECONFIG_DEVICE_ATTR(vendor_name);
492 static RECONFIG_DEVICE_ATTR(chip_name);
493 static RECONFIG_DEVICE_ATTR(modelname);
494 static DEVICE_ATTR_RO(init_pin_configs);
495 static DEVICE_ATTR_RO(driver_pin_configs);
496
497
498 #ifdef CONFIG_SND_HDA_PATCH_LOADER
499
500 /* parser mode */
501 enum {
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
strmatch(const char * a,const char * b)515 static inline int strmatch(const char *a, const char *b)
516 {
517 return strncasecmp(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 */
parse_codec_mode(char * buf,struct hda_bus * bus,struct hda_codec ** codecp)523 static 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 */
parse_pincfg_mode(char * buf,struct hda_bus * bus,struct hda_codec ** codecp)546 static 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
parse_verb_mode(char * buf,struct hda_bus * bus,struct hda_codec ** codecp)552 static void parse_verb_mode(char *buf, struct hda_bus *bus,
553 struct hda_codec **codecp)
554 {
555 parse_init_verbs(*codecp, buf);
556 }
557
parse_hint_mode(char * buf,struct hda_bus * bus,struct hda_codec ** codecp)558 static void parse_hint_mode(char *buf, struct hda_bus *bus,
559 struct hda_codec **codecp)
560 {
561 parse_hints(*codecp, buf);
562 }
563
parse_model_mode(char * buf,struct hda_bus * bus,struct hda_codec ** codecp)564 static 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
parse_chip_name_mode(char * buf,struct hda_bus * bus,struct hda_codec ** codecp)571 static 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) \
579 static 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
587 DEFINE_PARSE_ID_MODE(vendor_id);
588 DEFINE_PARSE_ID_MODE(subsystem_id);
589 DEFINE_PARSE_ID_MODE(revision_id);
590
591
592 struct 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
598 static 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 */
parse_line_mode(char * buf,struct hda_bus * bus)641 static 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 */
get_line_from_fw(char * buf,int size,size_t * fw_size_p,const void ** fw_data_p)661 static 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 */
snd_hda_load_patch(struct hda_bus * bus,size_t fw_size,const void * fw_buf)696 int 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 }
715 EXPORT_SYMBOL_GPL(snd_hda_load_patch);
716 #endif /* CONFIG_SND_HDA_PATCH_LOADER */
717
718 /*
719 * sysfs entries
720 */
721 static 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
746 static struct attribute_group hda_dev_attr_group = {
747 .attrs = hda_dev_attrs,
748 };
749
750 const struct attribute_group *snd_hda_dev_attr_groups[] = {
751 &hda_dev_attr_group,
752 NULL
753 };
754
snd_hda_sysfs_init(struct hda_codec * codec)755 void 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
snd_hda_sysfs_clear(struct hda_codec * codec)765 void 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 }
781