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-rw-r--r--usr/src/dkms_source_tree/hda_hwdep.c818
1 files changed, 818 insertions, 0 deletions
diff --git a/usr/src/dkms_source_tree/hda_hwdep.c b/usr/src/dkms_source_tree/hda_hwdep.c
new file mode 100644
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--- /dev/null
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@@ -0,0 +1,818 @@
1/*
2 * HWDEP Interface for HD-audio codec
3 *
4 * Copyright (c) 2007 Takashi Iwai <tiwai@suse.de>
5 *
6 * This driver is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This driver is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 */
20
21#include <linux/init.h>
22#include <linux/slab.h>
23#include <linux/pci.h>
24#include <linux/compat.h>
25#include <linux/mutex.h>
26#include <linux/ctype.h>
27#include <linux/string.h>
28#include <linux/firmware.h>
29#include <sound/core.h>
30#include "hda_codec.h"
31#include "hda_local.h"
32#include <sound/hda_hwdep.h>
33#include <sound/minors.h>
34
35/* hint string pair */
36struct hda_hint {
37 const char *key;
38 const char *val; /* contained in the same alloc as key */
39};
40
41/*
42 * write/read an out-of-bound verb
43 */
44static int verb_write_ioctl(struct hda_codec *codec,
45 struct hda_verb_ioctl __user *arg)
46{
47 u32 verb, res;
48
49 if (get_user(verb, &arg->verb))
50 return -EFAULT;
51 res = snd_hda_codec_read(codec, verb >> 24, 0,
52 (verb >> 8) & 0xffff, verb & 0xff);
53 if (put_user(res, &arg->res))
54 return -EFAULT;
55 return 0;
56}
57
58static int get_wcap_ioctl(struct hda_codec *codec,
59 struct hda_verb_ioctl __user *arg)
60{
61 u32 verb, res;
62
63 if (get_user(verb, &arg->verb))
64 return -EFAULT;
65 res = get_wcaps(codec, verb >> 24);
66 if (put_user(res, &arg->res))
67 return -EFAULT;
68 return 0;
69}
70
71
72/*
73 */
74static int hda_hwdep_ioctl(struct snd_hwdep *hw, struct file *file,
75 unsigned int cmd, unsigned long arg)
76{
77 struct hda_codec *codec = hw->private_data;
78 void __user *argp = (void __user *)arg;
79
80 switch (cmd) {
81 case HDA_IOCTL_PVERSION:
82 return put_user(HDA_HWDEP_VERSION, (int __user *)argp);
83 case HDA_IOCTL_VERB_WRITE:
84 return verb_write_ioctl(codec, argp);
85 case HDA_IOCTL_GET_WCAP:
86 return get_wcap_ioctl(codec, argp);
87 }
88 return -ENOIOCTLCMD;
89}
90
91#ifdef CONFIG_COMPAT
92static int hda_hwdep_ioctl_compat(struct snd_hwdep *hw, struct file *file,
93 unsigned int cmd, unsigned long arg)
94{
95 return hda_hwdep_ioctl(hw, file, cmd, (unsigned long)compat_ptr(arg));
96}
97#endif
98
99static int hda_hwdep_open(struct snd_hwdep *hw, struct file *file)
100{
101#ifndef CONFIG_SND_DEBUG_VERBOSE
102 if (!capable(CAP_SYS_RAWIO))
103 return -EACCES;
104#endif
105 return 0;
106}
107
108static void clear_hwdep_elements(struct hda_codec *codec)
109{
110 int i;
111
112 /* clear init verbs */
113 snd_array_free(&codec->init_verbs);
114 /* clear hints */
115 for (i = 0; i < codec->hints.used; i++) {
116 struct hda_hint *hint = snd_array_elem(&codec->hints, i);
117 kfree(hint->key); /* we don't need to free hint->val */
118 }
119 snd_array_free(&codec->hints);
120 snd_array_free(&codec->user_pins);
121}
122
123static void hwdep_free(struct snd_hwdep *hwdep)
124{
125 clear_hwdep_elements(hwdep->private_data);
126}
127
128int /*__devinit*/ snd_hda_create_hwdep(struct hda_codec *codec)
129{
130 char hwname[16];
131 struct snd_hwdep *hwdep;
132 int err;
133
134 sprintf(hwname, "HDA Codec %d", codec->addr);
135 err = snd_hwdep_new(codec->bus->card, hwname, codec->addr, &hwdep);
136 if (err < 0)
137 return err;
138 codec->hwdep = hwdep;
139 sprintf(hwdep->name, "HDA Codec %d", codec->addr);
140 hwdep->iface = SNDRV_HWDEP_IFACE_HDA;
141 hwdep->private_data = codec;
142 hwdep->private_free = hwdep_free;
143 hwdep->exclusive = 1;
144
145 hwdep->ops.open = hda_hwdep_open;
146 hwdep->ops.ioctl = hda_hwdep_ioctl;
147#ifdef CONFIG_COMPAT
148 hwdep->ops.ioctl_compat = hda_hwdep_ioctl_compat;
149#endif
150
151 snd_array_init(&codec->init_verbs, sizeof(struct hda_verb), 32);
152 snd_array_init(&codec->hints, sizeof(struct hda_hint), 32);
153 snd_array_init(&codec->user_pins, sizeof(struct hda_pincfg), 16);
154
155 return 0;
156}
157
158#ifdef CONFIG_SND_HDA_POWER_SAVE
159static ssize_t power_on_acct_show(struct device *dev,
160 struct device_attribute *attr,
161 char *buf)
162{
163 struct snd_hwdep *hwdep = dev_get_drvdata(dev);
164 struct hda_codec *codec = hwdep->private_data;
165 snd_hda_update_power_acct(codec);
166 return sprintf(buf, "%u\n", jiffies_to_msecs(codec->power_on_acct));
167}
168
169static ssize_t power_off_acct_show(struct device *dev,
170 struct device_attribute *attr,
171 char *buf)
172{
173 struct snd_hwdep *hwdep = dev_get_drvdata(dev);
174 struct hda_codec *codec = hwdep->private_data;
175 snd_hda_update_power_acct(codec);
176 return sprintf(buf, "%u\n", jiffies_to_msecs(codec->power_off_acct));
177}
178
179static struct device_attribute power_attrs[] = {
180 __ATTR_RO(power_on_acct),
181 __ATTR_RO(power_off_acct),
182};
183
184int snd_hda_hwdep_add_power_sysfs(struct hda_codec *codec)
185{
186 struct snd_hwdep *hwdep = codec->hwdep;
187 int i;
188
189 for (i = 0; i < ARRAY_SIZE(power_attrs); i++)
190 snd_add_device_sysfs_file(SNDRV_DEVICE_TYPE_HWDEP, hwdep->card,
191 hwdep->device, &power_attrs[i]);
192 return 0;
193}
194#endif /* CONFIG_SND_HDA_POWER_SAVE */
195
196#ifdef CONFIG_SND_HDA_RECONFIG
197
198/*
199 * sysfs interface
200 */
201
202static int clear_codec(struct hda_codec *codec)
203{
204 int err;
205
206 err = snd_hda_codec_reset(codec);
207 if (err < 0) {
208 snd_printk(KERN_ERR "The codec is being used, can't free.\n");
209 return err;
210 }
211 clear_hwdep_elements(codec);
212 return 0;
213}
214
215static int reconfig_codec(struct hda_codec *codec)
216{
217 int err;
218
219 snd_hda_power_up(codec);
220 snd_printk(KERN_INFO "hda-codec: reconfiguring\n");
221 err = snd_hda_codec_reset(codec);
222 if (err < 0) {
223 snd_printk(KERN_ERR
224 "The codec is being used, can't reconfigure.\n");
225 goto error;
226 }
227 err = snd_hda_codec_configure(codec);
228 if (err < 0)
229 goto error;
230 /* rebuild PCMs */
231 err = snd_hda_codec_build_pcms(codec);
232 if (err < 0)
233 goto error;
234 /* rebuild mixers */
235 err = snd_hda_codec_build_controls(codec);
236 if (err < 0)
237 goto error;
238 err = snd_card_register(codec->bus->card);
239 error:
240 snd_hda_power_down(codec);
241 return err;
242}
243
244/*
245 * allocate a string at most len chars, and remove the trailing EOL
246 */
247static char *kstrndup_noeol(const char *src, size_t len)
248{
249 char *s = kstrndup(src, len, GFP_KERNEL);
250 char *p;
251 if (!s)
252 return NULL;
253 p = strchr(s, '\n');
254 if (p)
255 *p = 0;
256 return s;
257}
258
259#define CODEC_INFO_SHOW(type) \
260static ssize_t type##_show(struct device *dev, \
261 struct device_attribute *attr, \
262 char *buf) \
263{ \
264 struct snd_hwdep *hwdep = dev_get_drvdata(dev); \
265 struct hda_codec *codec = hwdep->private_data; \
266 return sprintf(buf, "0x%x\n", codec->type); \
267}
268
269#define CODEC_INFO_STR_SHOW(type) \
270static ssize_t type##_show(struct device *dev, \
271 struct device_attribute *attr, \
272 char *buf) \
273{ \
274 struct snd_hwdep *hwdep = dev_get_drvdata(dev); \
275 struct hda_codec *codec = hwdep->private_data; \
276 return sprintf(buf, "%s\n", \
277 codec->type ? codec->type : ""); \
278}
279
280CODEC_INFO_SHOW(vendor_id);
281CODEC_INFO_SHOW(subsystem_id);
282CODEC_INFO_SHOW(revision_id);
283CODEC_INFO_SHOW(afg);
284CODEC_INFO_SHOW(mfg);
285CODEC_INFO_STR_SHOW(vendor_name);
286CODEC_INFO_STR_SHOW(chip_name);
287CODEC_INFO_STR_SHOW(modelname);
288
289#define CODEC_INFO_STORE(type) \
290static ssize_t type##_store(struct device *dev, \
291 struct device_attribute *attr, \
292 const char *buf, size_t count) \
293{ \
294 struct snd_hwdep *hwdep = dev_get_drvdata(dev); \
295 struct hda_codec *codec = hwdep->private_data; \
296 unsigned long val; \
297 int err = strict_strtoul(buf, 0, &val); \
298 if (err < 0) \
299 return err; \
300 codec->type = val; \
301 return count; \
302}
303
304#define CODEC_INFO_STR_STORE(type) \
305static ssize_t type##_store(struct device *dev, \
306 struct device_attribute *attr, \
307 const char *buf, size_t count) \
308{ \
309 struct snd_hwdep *hwdep = dev_get_drvdata(dev); \
310 struct hda_codec *codec = hwdep->private_data; \
311 char *s = kstrndup_noeol(buf, 64); \
312 if (!s) \
313 return -ENOMEM; \
314 kfree(codec->type); \
315 codec->type = s; \
316 return count; \
317}
318
319CODEC_INFO_STORE(vendor_id);
320CODEC_INFO_STORE(subsystem_id);
321CODEC_INFO_STORE(revision_id);
322CODEC_INFO_STR_STORE(vendor_name);
323CODEC_INFO_STR_STORE(chip_name);
324CODEC_INFO_STR_STORE(modelname);
325
326#define CODEC_ACTION_STORE(type) \
327static ssize_t type##_store(struct device *dev, \
328 struct device_attribute *attr, \
329 const char *buf, size_t count) \
330{ \
331 struct snd_hwdep *hwdep = dev_get_drvdata(dev); \
332 struct hda_codec *codec = hwdep->private_data; \
333 int err = 0; \
334 if (*buf) \
335 err = type##_codec(codec); \
336 return err < 0 ? err : count; \
337}
338
339CODEC_ACTION_STORE(reconfig);
340CODEC_ACTION_STORE(clear);
341
342static ssize_t init_verbs_show(struct device *dev,
343 struct device_attribute *attr,
344 char *buf)
345{
346 struct snd_hwdep *hwdep = dev_get_drvdata(dev);
347 struct hda_codec *codec = hwdep->private_data;
348 int i, len = 0;
349 for (i = 0; i < codec->init_verbs.used; i++) {
350 struct hda_verb *v = snd_array_elem(&codec->init_verbs, i);
351 len += snprintf(buf + len, PAGE_SIZE - len,
352 "0x%02x 0x%03x 0x%04x\n",
353 v->nid, v->verb, v->param);
354 }
355 return len;
356}
357
358static int parse_init_verbs(struct hda_codec *codec, const char *buf)
359{
360 struct hda_verb *v;
361 int nid, verb, param;
362
363 if (sscanf(buf, "%i %i %i", &nid, &verb, &param) != 3)
364 return -EINVAL;
365 if (!nid || !verb)
366 return -EINVAL;
367 v = snd_array_new(&codec->init_verbs);
368 if (!v)
369 return -ENOMEM;
370 v->nid = nid;
371 v->verb = verb;
372 v->param = param;
373 return 0;
374}
375
376static ssize_t init_verbs_store(struct device *dev,
377 struct device_attribute *attr,
378 const char *buf, size_t count)
379{
380 struct snd_hwdep *hwdep = dev_get_drvdata(dev);
381 struct hda_codec *codec = hwdep->private_data;
382 int err = parse_init_verbs(codec, buf);
383 if (err < 0)
384 return err;
385 return count;
386}
387
388static ssize_t hints_show(struct device *dev,
389 struct device_attribute *attr,
390 char *buf)
391{
392 struct snd_hwdep *hwdep = dev_get_drvdata(dev);
393 struct hda_codec *codec = hwdep->private_data;
394 int i, len = 0;
395 for (i = 0; i < codec->hints.used; i++) {
396 struct hda_hint *hint = snd_array_elem(&codec->hints, i);
397 len += snprintf(buf + len, PAGE_SIZE - len,
398 "%s = %s\n", hint->key, hint->val);
399 }
400 return len;
401}
402
403static struct hda_hint *get_hint(struct hda_codec *codec, const char *key)
404{
405 int i;
406
407 for (i = 0; i < codec->hints.used; i++) {
408 struct hda_hint *hint = snd_array_elem(&codec->hints, i);
409 if (!strcmp(hint->key, key))
410 return hint;
411 }
412 return NULL;
413}
414
415static void remove_trail_spaces(char *str)
416{
417 char *p;
418 if (!*str)
419 return;
420 p = str + strlen(str) - 1;
421 for (; isspace(*p); p--) {
422 *p = 0;
423 if (p == str)
424 return;
425 }
426}
427
428#define MAX_HINTS 1024
429
430static int parse_hints(struct hda_codec *codec, const char *buf)
431{
432 char *key, *val;
433 struct hda_hint *hint;
434
435 buf = skip_spaces(buf);
436 if (!*buf || *buf == '#' || *buf == '\n')
437 return 0;
438 if (*buf == '=')
439 return -EINVAL;
440 key = kstrndup_noeol(buf, 1024);
441 if (!key)
442 return -ENOMEM;
443 /* extract key and val */
444 val = strchr(key, '=');
445 if (!val) {
446 kfree(key);
447 return -EINVAL;
448 }
449 *val++ = 0;
450 val = skip_spaces(val);
451 remove_trail_spaces(key);
452 remove_trail_spaces(val);
453 hint = get_hint(codec, key);
454 if (hint) {
455 /* replace */
456 kfree(hint->key);
457 hint->key = key;
458 hint->val = val;
459 return 0;
460 }
461 /* allocate a new hint entry */
462 if (codec->hints.used >= MAX_HINTS)
463 hint = NULL;
464 else
465 hint = snd_array_new(&codec->hints);
466 if (!hint) {
467 kfree(key);
468 return -ENOMEM;
469 }
470 hint->key = key;
471 hint->val = val;
472 return 0;
473}
474
475static ssize_t hints_store(struct device *dev,
476 struct device_attribute *attr,
477 const char *buf, size_t count)
478{
479 struct snd_hwdep *hwdep = dev_get_drvdata(dev);
480 struct hda_codec *codec = hwdep->private_data;
481 int err = parse_hints(codec, buf);
482 if (err < 0)
483 return err;
484 return count;
485}
486
487static ssize_t pin_configs_show(struct hda_codec *codec,
488 struct snd_array *list,
489 char *buf)
490{
491 int i, len = 0;
492 for (i = 0; i < list->used; i++) {
493 struct hda_pincfg *pin = snd_array_elem(list, i);
494 len += sprintf(buf + len, "0x%02x 0x%08x\n",
495 pin->nid, pin->cfg);
496 }
497 return len;
498}
499
500static ssize_t init_pin_configs_show(struct device *dev,
501 struct device_attribute *attr,
502 char *buf)
503{
504 struct snd_hwdep *hwdep = dev_get_drvdata(dev);
505 struct hda_codec *codec = hwdep->private_data;
506 return pin_configs_show(codec, &codec->init_pins, buf);
507}
508
509static ssize_t user_pin_configs_show(struct device *dev,
510 struct device_attribute *attr,
511 char *buf)
512{
513 struct snd_hwdep *hwdep = dev_get_drvdata(dev);
514 struct hda_codec *codec = hwdep->private_data;
515 return pin_configs_show(codec, &codec->user_pins, buf);
516}
517
518static ssize_t driver_pin_configs_show(struct device *dev,
519 struct device_attribute *attr,
520 char *buf)
521{
522 struct snd_hwdep *hwdep = dev_get_drvdata(dev);
523 struct hda_codec *codec = hwdep->private_data;
524 return pin_configs_show(codec, &codec->driver_pins, buf);
525}
526
527#define MAX_PIN_CONFIGS 32
528
529static int parse_user_pin_configs(struct hda_codec *codec, const char *buf)
530{
531 int nid, cfg;
532
533 if (sscanf(buf, "%i %i", &nid, &cfg) != 2)
534 return -EINVAL;
535 if (!nid)
536 return -EINVAL;
537 return snd_hda_add_pincfg(codec, &codec->user_pins, nid, cfg);
538}
539
540static ssize_t user_pin_configs_store(struct device *dev,
541 struct device_attribute *attr,
542 const char *buf, size_t count)
543{
544 struct snd_hwdep *hwdep = dev_get_drvdata(dev);
545 struct hda_codec *codec = hwdep->private_data;
546 int err = parse_user_pin_configs(codec, buf);
547 if (err < 0)
548 return err;
549 return count;
550}
551
552#define CODEC_ATTR_RW(type) \
553 __ATTR(type, 0644, type##_show, type##_store)
554#define CODEC_ATTR_RO(type) \
555 __ATTR_RO(type)
556#define CODEC_ATTR_WO(type) \
557 __ATTR(type, 0200, NULL, type##_store)
558
559static struct device_attribute codec_attrs[] = {
560 CODEC_ATTR_RW(vendor_id),
561 CODEC_ATTR_RW(subsystem_id),
562 CODEC_ATTR_RW(revision_id),
563 CODEC_ATTR_RO(afg),
564 CODEC_ATTR_RO(mfg),
565 CODEC_ATTR_RW(vendor_name),
566 CODEC_ATTR_RW(chip_name),
567 CODEC_ATTR_RW(modelname),
568 CODEC_ATTR_RW(init_verbs),
569 CODEC_ATTR_RW(hints),
570 CODEC_ATTR_RO(init_pin_configs),
571 CODEC_ATTR_RW(user_pin_configs),
572 CODEC_ATTR_RO(driver_pin_configs),
573 CODEC_ATTR_WO(reconfig),
574 CODEC_ATTR_WO(clear),
575};
576
577/*
578 * create sysfs files on hwdep directory
579 */
580int snd_hda_hwdep_add_sysfs(struct hda_codec *codec)
581{
582 struct snd_hwdep *hwdep = codec->hwdep;
583 int i;
584
585 for (i = 0; i < ARRAY_SIZE(codec_attrs); i++)
586 snd_add_device_sysfs_file(SNDRV_DEVICE_TYPE_HWDEP, hwdep->card,
587 hwdep->device, &codec_attrs[i]);
588 return 0;
589}
590
591/*
592 * Look for hint string
593 */
594const char *snd_hda_get_hint(struct hda_codec *codec, const char *key)
595{
596 struct hda_hint *hint = get_hint(codec, key);
597 return hint ? hint->val : NULL;
598}
599EXPORT_SYMBOL_HDA(snd_hda_get_hint);
600
601int snd_hda_get_bool_hint(struct hda_codec *codec, const char *key)
602{
603 const char *p = snd_hda_get_hint(codec, key);
604 if (!p || !*p)
605 return -ENOENT;
606 switch (toupper(*p)) {
607 case 'T': /* true */
608 case 'Y': /* yes */
609 case '1':
610 return 1;
611 }
612 return 0;
613}
614EXPORT_SYMBOL_HDA(snd_hda_get_bool_hint);
615
616#endif /* CONFIG_SND_HDA_RECONFIG */
617
618#ifdef CONFIG_SND_HDA_PATCH_LOADER
619
620/* parser mode */
621enum {
622 LINE_MODE_NONE,
623 LINE_MODE_CODEC,
624 LINE_MODE_MODEL,
625 LINE_MODE_PINCFG,
626 LINE_MODE_VERB,
627 LINE_MODE_HINT,
628 LINE_MODE_VENDOR_ID,
629 LINE_MODE_SUBSYSTEM_ID,
630 LINE_MODE_REVISION_ID,
631 LINE_MODE_CHIP_NAME,
632 NUM_LINE_MODES,
633};
634
635static inline int strmatch(const char *a, const char *b)
636{
637 return strnicmp(a, b, strlen(b)) == 0;
638}
639
640/* parse the contents after the line "[codec]"
641 * accept only the line with three numbers, and assign the current codec
642 */
643static void parse_codec_mode(char *buf, struct hda_bus *bus,
644 struct hda_codec **codecp)
645{
646 unsigned int vendorid, subid, caddr;
647 struct hda_codec *codec;
648
649 *codecp = NULL;
650 if (sscanf(buf, "%i %i %i", &vendorid, &subid, &caddr) == 3) {
651 list_for_each_entry(codec, &bus->codec_list, list) {
652 if (codec->vendor_id == vendorid &&
653 codec->subsystem_id == subid &&
654 codec->addr == caddr) {
655 *codecp = codec;
656 break;
657 }
658 }
659 }
660}
661
662/* parse the contents after the other command tags, [pincfg], [verb],
663 * [vendor_id], [subsystem_id], [revision_id], [chip_name], [hint] and [model]
664 * just pass to the sysfs helper (only when any codec was specified)
665 */
666static void parse_pincfg_mode(char *buf, struct hda_bus *bus,
667 struct hda_codec **codecp)
668{
669 parse_user_pin_configs(*codecp, buf);
670}
671
672static void parse_verb_mode(char *buf, struct hda_bus *bus,
673 struct hda_codec **codecp)
674{
675 parse_init_verbs(*codecp, buf);
676}
677
678static void parse_hint_mode(char *buf, struct hda_bus *bus,
679 struct hda_codec **codecp)
680{
681 parse_hints(*codecp, buf);
682}
683
684static void parse_model_mode(char *buf, struct hda_bus *bus,
685 struct hda_codec **codecp)
686{
687 kfree((*codecp)->modelname);
688 (*codecp)->modelname = kstrdup(buf, GFP_KERNEL);
689}
690
691static void parse_chip_name_mode(char *buf, struct hda_bus *bus,
692 struct hda_codec **codecp)
693{
694 kfree((*codecp)->chip_name);
695 (*codecp)->chip_name = kstrdup(buf, GFP_KERNEL);
696}
697
698#define DEFINE_PARSE_ID_MODE(name) \
699static void parse_##name##_mode(char *buf, struct hda_bus *bus, \
700 struct hda_codec **codecp) \
701{ \
702 unsigned long val; \
703 if (!strict_strtoul(buf, 0, &val)) \
704 (*codecp)->name = val; \
705}
706
707DEFINE_PARSE_ID_MODE(vendor_id);
708DEFINE_PARSE_ID_MODE(subsystem_id);
709DEFINE_PARSE_ID_MODE(revision_id);
710
711
712struct hda_patch_item {
713 const char *tag;
714 void (*parser)(char *buf, struct hda_bus *bus, struct hda_codec **retc);
715 int need_codec;
716};
717
718static struct hda_patch_item patch_items[NUM_LINE_MODES] = {
719 [LINE_MODE_CODEC] = { "[codec]", parse_codec_mode, 0 },
720 [LINE_MODE_MODEL] = { "[model]", parse_model_mode, 1 },
721 [LINE_MODE_VERB] = { "[verb]", parse_verb_mode, 1 },
722 [LINE_MODE_PINCFG] = { "[pincfg]", parse_pincfg_mode, 1 },
723 [LINE_MODE_HINT] = { "[hint]", parse_hint_mode, 1 },
724 [LINE_MODE_VENDOR_ID] = { "[vendor_id]", parse_vendor_id_mode, 1 },
725 [LINE_MODE_SUBSYSTEM_ID] = { "[subsystem_id]", parse_subsystem_id_mode, 1 },
726 [LINE_MODE_REVISION_ID] = { "[revision_id]", parse_revision_id_mode, 1 },
727 [LINE_MODE_CHIP_NAME] = { "[chip_name]", parse_chip_name_mode, 1 },
728};
729
730/* check the line starting with '[' -- change the parser mode accodingly */
731static int parse_line_mode(char *buf, struct hda_bus *bus)
732{
733 int i;
734 for (i = 0; i < ARRAY_SIZE(patch_items); i++) {
735 if (!patch_items[i].tag)
736 continue;
737 if (strmatch(buf, patch_items[i].tag))
738 return i;
739 }
740 return LINE_MODE_NONE;
741}
742
743/* copy one line from the buffer in fw, and update the fields in fw
744 * return zero if it reaches to the end of the buffer, or non-zero
745 * if successfully copied a line
746 *
747 * the spaces at the beginning and the end of the line are stripped
748 */
749static int get_line_from_fw(char *buf, int size, struct firmware *fw)
750{
751 int len;
752 const char *p = fw->data;
753 while (isspace(*p) && fw->size) {
754 p++;
755 fw->size--;
756 }
757 if (!fw->size)
758 return 0;
759 if (size < fw->size)
760 size = fw->size;
761
762 for (len = 0; len < fw->size; len++) {
763 if (!*p)
764 break;
765 if (*p == '\n') {
766 p++;
767 len++;
768 break;
769 }
770 if (len < size)
771 *buf++ = *p++;
772 }
773 *buf = 0;
774 fw->size -= len;
775 fw->data = p;
776 remove_trail_spaces(buf);
777 return 1;
778}
779
780/*
781 * load a "patch" firmware file and parse it
782 */
783int snd_hda_load_patch(struct hda_bus *bus, const char *patch)
784{
785 int err;
786 const struct firmware *fw;
787 struct firmware tmp;
788 char buf[128];
789 struct hda_codec *codec;
790 int line_mode;
791 struct device *dev = bus->card->dev;
792
793 if (snd_BUG_ON(!dev))
794 return -ENODEV;
795 err = request_firmware(&fw, patch, dev);
796 if (err < 0) {
797 printk(KERN_ERR "hda-codec: Cannot load the patch '%s'\n",
798 patch);
799 return err;
800 }
801
802 tmp = *fw;
803 line_mode = LINE_MODE_NONE;
804 codec = NULL;
805 while (get_line_from_fw(buf, sizeof(buf) - 1, &tmp)) {
806 if (!*buf || *buf == '#' || *buf == '\n')
807 continue;
808 if (*buf == '[')
809 line_mode = parse_line_mode(buf, bus);
810 else if (patch_items[line_mode].parser &&
811 (codec || !patch_items[line_mode].need_codec))
812 patch_items[line_mode].parser(buf, bus, &codec);
813 }
814 release_firmware(fw);
815 return 0;
816}
817EXPORT_SYMBOL_HDA(snd_hda_load_patch);
818#endif /* CONFIG_SND_HDA_PATCH_LOADER */
generated by cgit v1.2.3 (git 2.39.1) at 2026-09-20 22:30:11 +0000