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powerpc/64s: Move cpu_show_meltdown()
[linux/fpc-iii.git] / sound / usb / mixer.c
blobf7eb0d2f797bcce73d7b542abc61f522af4287a6
1 /*
2 * (Tentative) USB Audio Driver for ALSA
3 *
4 * Mixer control part
5 *
6 * Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
7 *
8 * Many codes borrowed from audio.c by
9 * Alan Cox (alan@lxorguk.ukuu.org.uk)
10 * Thomas Sailer (sailer@ife.ee.ethz.ch)
11 *
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 *
27 */
28
29 /*
30 * TODOs, for both the mixer and the streaming interfaces:
31 *
32 * - support for UAC2 effect units
33 * - support for graphical equalizers
34 * - RANGE and MEM set commands (UAC2)
35 * - RANGE and MEM interrupt dispatchers (UAC2)
36 * - audio channel clustering (UAC2)
37 * - audio sample rate converter units (UAC2)
38 * - proper handling of clock multipliers (UAC2)
39 * - dispatch clock change notifications (UAC2)
40 * - stop PCM streams which use a clock that became invalid
41 * - stop PCM streams which use a clock selector that has changed
42 * - parse available sample rates again when clock sources changed
43 */
44
45 #include <linux/bitops.h>
46 #include <linux/init.h>
47 #include <linux/list.h>
48 #include <linux/slab.h>
49 #include <linux/string.h>
50 #include <linux/usb.h>
51 #include <linux/usb/audio.h>
52 #include <linux/usb/audio-v2.h>
53
54 #include <sound/core.h>
55 #include <sound/control.h>
56 #include <sound/hwdep.h>
57 #include <sound/info.h>
58 #include <sound/tlv.h>
59
60 #include "usbaudio.h"
61 #include "mixer.h"
62 #include "helper.h"
63 #include "mixer_quirks.h"
64 #include "power.h"
65
66 #define MAX_ID_ELEMS 256
67
68 struct usb_audio_term {
69 int id;
70 int type;
71 int channels;
72 unsigned int chconfig;
73 int name;
74 };
75
76 struct usbmix_name_map;
77
78 struct mixer_build {
79 struct snd_usb_audio *chip;
80 struct usb_mixer_interface *mixer;
81 unsigned char *buffer;
82 unsigned int buflen;
83 DECLARE_BITMAP(unitbitmap, MAX_ID_ELEMS);
84 struct usb_audio_term oterm;
85 const struct usbmix_name_map *map;
86 const struct usbmix_selector_map *selector_map;
87 };
88
89 /*E-mu 0202/0404/0204 eXtension Unit(XU) control*/
90 enum {
91 USB_XU_CLOCK_RATE = 0xe301,
92 USB_XU_CLOCK_SOURCE = 0xe302,
93 USB_XU_DIGITAL_IO_STATUS = 0xe303,
94 USB_XU_DEVICE_OPTIONS = 0xe304,
95 USB_XU_DIRECT_MONITORING = 0xe305,
96 USB_XU_METERING = 0xe306
97 };
98 enum {
99 USB_XU_CLOCK_SOURCE_SELECTOR = 0x02, /* clock source*/
100 USB_XU_CLOCK_RATE_SELECTOR = 0x03, /* clock rate */
101 USB_XU_DIGITAL_FORMAT_SELECTOR = 0x01, /* the spdif format */
102 USB_XU_SOFT_LIMIT_SELECTOR = 0x03 /* soft limiter */
103 };
104
105 /*
106 * manual mapping of mixer names
107 * if the mixer topology is too complicated and the parsed names are
108 * ambiguous, add the entries in usbmixer_maps.c.
109 */
110 #include "mixer_maps.c"
111
112 static const struct usbmix_name_map *
113 find_map(struct mixer_build *state, int unitid, int control)
114 {
115 const struct usbmix_name_map *p = state->map;
116
117 if (!p)
118 return NULL;
119
120 for (p = state->map; p->id; p++) {
121 if (p->id == unitid &&
122 (!control || !p->control || control == p->control))
123 return p;
124 }
125 return NULL;
126 }
127
128 /* get the mapped name if the unit matches */
129 static int
130 check_mapped_name(const struct usbmix_name_map *p, char *buf, int buflen)
131 {
132 if (!p || !p->name)
133 return 0;
134
135 buflen--;
136 return strlcpy(buf, p->name, buflen);
137 }
138
139 /* ignore the error value if ignore_ctl_error flag is set */
140 #define filter_error(cval, err) \
141 ((cval)->head.mixer->ignore_ctl_error ? 0 : (err))
142
143 /* check whether the control should be ignored */
144 static inline int
145 check_ignored_ctl(const struct usbmix_name_map *p)
146 {
147 if (!p || p->name || p->dB)
148 return 0;
149 return 1;
150 }
151
152 /* dB mapping */
153 static inline void check_mapped_dB(const struct usbmix_name_map *p,
154 struct usb_mixer_elem_info *cval)
155 {
156 if (p && p->dB) {
157 cval->dBmin = p->dB->min;
158 cval->dBmax = p->dB->max;
159 cval->initialized = 1;
160 }
161 }
162
163 /* get the mapped selector source name */
164 static int check_mapped_selector_name(struct mixer_build *state, int unitid,
165 int index, char *buf, int buflen)
166 {
167 const struct usbmix_selector_map *p;
168
169 if (!state->selector_map)
170 return 0;
171 for (p = state->selector_map; p->id; p++) {
172 if (p->id == unitid && index < p->count)
173 return strlcpy(buf, p->names[index], buflen);
174 }
175 return 0;
176 }
177
178 /*
179 * find an audio control unit with the given unit id
180 */
181 static void *find_audio_control_unit(struct mixer_build *state,
182 unsigned char unit)
183 {
184 /* we just parse the header */
185 struct uac_feature_unit_descriptor *hdr = NULL;
186
187 while ((hdr = snd_usb_find_desc(state->buffer, state->buflen, hdr,
188 USB_DT_CS_INTERFACE)) != NULL) {
189 if (hdr->bLength >= 4 &&
190 hdr->bDescriptorSubtype >= UAC_INPUT_TERMINAL &&
191 hdr->bDescriptorSubtype <= UAC2_SAMPLE_RATE_CONVERTER &&
192 hdr->bUnitID == unit)
193 return hdr;
194 }
195
196 return NULL;
197 }
198
199 /*
200 * copy a string with the given id
201 */
202 static int snd_usb_copy_string_desc(struct mixer_build *state,
203 int index, char *buf, int maxlen)
204 {
205 int len = usb_string(state->chip->dev, index, buf, maxlen - 1);
206
207 if (len < 0)
208 return 0;
209
210 buf[len] = 0;
211 return len;
212 }
213
214 /*
215 * convert from the byte/word on usb descriptor to the zero-based integer
216 */
217 static int convert_signed_value(struct usb_mixer_elem_info *cval, int val)
218 {
219 switch (cval->val_type) {
220 case USB_MIXER_BOOLEAN:
221 return !!val;
222 case USB_MIXER_INV_BOOLEAN:
223 return !val;
224 case USB_MIXER_U8:
225 val &= 0xff;
226 break;
227 case USB_MIXER_S8:
228 val &= 0xff;
229 if (val >= 0x80)
230 val -= 0x100;
231 break;
232 case USB_MIXER_U16:
233 val &= 0xffff;
234 break;
235 case USB_MIXER_S16:
236 val &= 0xffff;
237 if (val >= 0x8000)
238 val -= 0x10000;
239 break;
240 }
241 return val;
242 }
243
244 /*
245 * convert from the zero-based int to the byte/word for usb descriptor
246 */
247 static int convert_bytes_value(struct usb_mixer_elem_info *cval, int val)
248 {
249 switch (cval->val_type) {
250 case USB_MIXER_BOOLEAN:
251 return !!val;
252 case USB_MIXER_INV_BOOLEAN:
253 return !val;
254 case USB_MIXER_S8:
255 case USB_MIXER_U8:
256 return val & 0xff;
257 case USB_MIXER_S16:
258 case USB_MIXER_U16:
259 return val & 0xffff;
260 }
261 return 0; /* not reached */
262 }
263
264 static int get_relative_value(struct usb_mixer_elem_info *cval, int val)
265 {
266 if (!cval->res)
267 cval->res = 1;
268 if (val < cval->min)
269 return 0;
270 else if (val >= cval->max)
271 return (cval->max - cval->min + cval->res - 1) / cval->res;
272 else
273 return (val - cval->min) / cval->res;
274 }
275
276 static int get_abs_value(struct usb_mixer_elem_info *cval, int val)
277 {
278 if (val < 0)
279 return cval->min;
280 if (!cval->res)
281 cval->res = 1;
282 val *= cval->res;
283 val += cval->min;
284 if (val > cval->max)
285 return cval->max;
286 return val;
287 }
288
289 static int uac2_ctl_value_size(int val_type)
290 {
291 switch (val_type) {
292 case USB_MIXER_S32:
293 case USB_MIXER_U32:
294 return 4;
295 case USB_MIXER_S16:
296 case USB_MIXER_U16:
297 return 2;
298 default:
299 return 1;
300 }
301 return 0; /* unreachable */
302 }
303
304
305 /*
306 * retrieve a mixer value
307 */
308
309 static int get_ctl_value_v1(struct usb_mixer_elem_info *cval, int request,
310 int validx, int *value_ret)
311 {
312 struct snd_usb_audio *chip = cval->head.mixer->chip;
313 unsigned char buf[2];
314 int val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1;
315 int timeout = 10;
316 int idx = 0, err;
317
318 err = snd_usb_lock_shutdown(chip);
319 if (err < 0)
320 return -EIO;
321
322 while (timeout-- > 0) {
323 idx = snd_usb_ctrl_intf(chip) | (cval->head.id << 8);
324 if (snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), request,
325 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
326 validx, idx, buf, val_len) >= val_len) {
327 *value_ret = convert_signed_value(cval, snd_usb_combine_bytes(buf, val_len));
328 err = 0;
329 goto out;
330 }
331 }
332 usb_audio_dbg(chip,
333 "cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n",
334 request, validx, idx, cval->val_type);
335 err = -EINVAL;
336
337 out:
338 snd_usb_unlock_shutdown(chip);
339 return err;
340 }
341
342 static int get_ctl_value_v2(struct usb_mixer_elem_info *cval, int request,
343 int validx, int *value_ret)
344 {
345 struct snd_usb_audio *chip = cval->head.mixer->chip;
346 /* enough space for one range */
347 unsigned char buf[sizeof(__u16) + 3 * sizeof(__u32)];
348 unsigned char *val;
349 int idx = 0, ret, val_size, size;
350 __u8 bRequest;
351
352 val_size = uac2_ctl_value_size(cval->val_type);
353
354 if (request == UAC_GET_CUR) {
355 bRequest = UAC2_CS_CUR;
356 size = val_size;
357 } else {
358 bRequest = UAC2_CS_RANGE;
359 size = sizeof(__u16) + 3 * val_size;
360 }
361
362 memset(buf, 0, sizeof(buf));
363
364 ret = snd_usb_lock_shutdown(chip) ? -EIO : 0;
365 if (ret)
366 goto error;
367
368 idx = snd_usb_ctrl_intf(chip) | (cval->head.id << 8);
369 ret = snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), bRequest,
370 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
371 validx, idx, buf, size);
372 snd_usb_unlock_shutdown(chip);
373
374 if (ret < 0) {
375 error:
376 usb_audio_err(chip,
377 "cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n",
378 request, validx, idx, cval->val_type);
379 return ret;
380 }
381
382 /* FIXME: how should we handle multiple triplets here? */
383
384 switch (request) {
385 case UAC_GET_CUR:
386 val = buf;
387 break;
388 case UAC_GET_MIN:
389 val = buf + sizeof(__u16);
390 break;
391 case UAC_GET_MAX:
392 val = buf + sizeof(__u16) + val_size;
393 break;
394 case UAC_GET_RES:
395 val = buf + sizeof(__u16) + val_size * 2;
396 break;
397 default:
398 return -EINVAL;
399 }
400
401 *value_ret = convert_signed_value(cval,
402 snd_usb_combine_bytes(val, val_size));
403
404 return 0;
405 }
406
407 static int get_ctl_value(struct usb_mixer_elem_info *cval, int request,
408 int validx, int *value_ret)
409 {
410 validx += cval->idx_off;
411
412 return (cval->head.mixer->protocol == UAC_VERSION_1) ?
413 get_ctl_value_v1(cval, request, validx, value_ret) :
414 get_ctl_value_v2(cval, request, validx, value_ret);
415 }
416
417 static int get_cur_ctl_value(struct usb_mixer_elem_info *cval,
418 int validx, int *value)
419 {
420 return get_ctl_value(cval, UAC_GET_CUR, validx, value);
421 }
422
423 /* channel = 0: master, 1 = first channel */
424 static inline int get_cur_mix_raw(struct usb_mixer_elem_info *cval,
425 int channel, int *value)
426 {
427 return get_ctl_value(cval, UAC_GET_CUR,
428 (cval->control << 8) | channel,
429 value);
430 }
431
432 int snd_usb_get_cur_mix_value(struct usb_mixer_elem_info *cval,
433 int channel, int index, int *value)
434 {
435 int err;
436
437 if (cval->cached & (1 << channel)) {
438 *value = cval->cache_val[index];
439 return 0;
440 }
441 err = get_cur_mix_raw(cval, channel, value);
442 if (err < 0) {
443 if (!cval->head.mixer->ignore_ctl_error)
444 usb_audio_dbg(cval->head.mixer->chip,
445 "cannot get current value for control %d ch %d: err = %d\n",
446 cval->control, channel, err);
447 return err;
448 }
449 cval->cached |= 1 << channel;
450 cval->cache_val[index] = *value;
451 return 0;
452 }
453
454 /*
455 * set a mixer value
456 */
457
458 int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval,
459 int request, int validx, int value_set)
460 {
461 struct snd_usb_audio *chip = cval->head.mixer->chip;
462 unsigned char buf[4];
463 int idx = 0, val_len, err, timeout = 10;
464
465 validx += cval->idx_off;
466
467 if (cval->head.mixer->protocol == UAC_VERSION_1) {
468 val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1;
469 } else { /* UAC_VERSION_2 */
470 val_len = uac2_ctl_value_size(cval->val_type);
471
472 /* FIXME */
473 if (request != UAC_SET_CUR) {
474 usb_audio_dbg(chip, "RANGE setting not yet supported\n");
475 return -EINVAL;
476 }
477
478 request = UAC2_CS_CUR;
479 }
480
481 value_set = convert_bytes_value(cval, value_set);
482 buf[0] = value_set & 0xff;
483 buf[1] = (value_set >> 8) & 0xff;
484 buf[2] = (value_set >> 16) & 0xff;
485 buf[3] = (value_set >> 24) & 0xff;
486
487 err = snd_usb_lock_shutdown(chip);
488 if (err < 0)
489 return -EIO;
490
491 while (timeout-- > 0) {
492 idx = snd_usb_ctrl_intf(chip) | (cval->head.id << 8);
493 if (snd_usb_ctl_msg(chip->dev,
494 usb_sndctrlpipe(chip->dev, 0), request,
495 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
496 validx, idx, buf, val_len) >= 0) {
497 err = 0;
498 goto out;
499 }
500 }
501 usb_audio_dbg(chip, "cannot set ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d, data = %#x/%#x\n",
502 request, validx, idx, cval->val_type, buf[0], buf[1]);
503 err = -EINVAL;
504
505 out:
506 snd_usb_unlock_shutdown(chip);
507 return err;
508 }
509
510 static int set_cur_ctl_value(struct usb_mixer_elem_info *cval,
511 int validx, int value)
512 {
513 return snd_usb_mixer_set_ctl_value(cval, UAC_SET_CUR, validx, value);
514 }
515
516 int snd_usb_set_cur_mix_value(struct usb_mixer_elem_info *cval, int channel,
517 int index, int value)
518 {
519 int err;
520 unsigned int read_only = (channel == 0) ?
521 cval->master_readonly :
522 cval->ch_readonly & (1 << (channel - 1));
523
524 if (read_only) {
525 usb_audio_dbg(cval->head.mixer->chip,
526 "%s(): channel %d of control %d is read_only\n",
527 __func__, channel, cval->control);
528 return 0;
529 }
530
531 err = snd_usb_mixer_set_ctl_value(cval,
532 UAC_SET_CUR, (cval->control << 8) | channel,
533 value);
534 if (err < 0)
535 return err;
536 cval->cached |= 1 << channel;
537 cval->cache_val[index] = value;
538 return 0;
539 }
540
541 /*
542 * TLV callback for mixer volume controls
543 */
544 int snd_usb_mixer_vol_tlv(struct snd_kcontrol *kcontrol, int op_flag,
545 unsigned int size, unsigned int __user *_tlv)
546 {
547 struct usb_mixer_elem_info *cval = kcontrol->private_data;
548 DECLARE_TLV_DB_MINMAX(scale, 0, 0);
549
550 if (size < sizeof(scale))
551 return -ENOMEM;
552 if (cval->min_mute)
553 scale[0] = SNDRV_CTL_TLVT_DB_MINMAX_MUTE;
554 scale[2] = cval->dBmin;
555 scale[3] = cval->dBmax;
556 if (copy_to_user(_tlv, scale, sizeof(scale)))
557 return -EFAULT;
558 return 0;
559 }
560
561 /*
562 * parser routines begin here...
563 */
564
565 static int parse_audio_unit(struct mixer_build *state, int unitid);
566
567
568 /*
569 * check if the input/output channel routing is enabled on the given bitmap.
570 * used for mixer unit parser
571 */
572 static int check_matrix_bitmap(unsigned char *bmap,
573 int ich, int och, int num_outs)
574 {
575 int idx = ich * num_outs + och;
576 return bmap[idx >> 3] & (0x80 >> (idx & 7));
577 }
578
579 /*
580 * add an alsa control element
581 * search and increment the index until an empty slot is found.
582 *
583 * if failed, give up and free the control instance.
584 */
585
586 int snd_usb_mixer_add_control(struct usb_mixer_elem_list *list,
587 struct snd_kcontrol *kctl)
588 {
589 struct usb_mixer_interface *mixer = list->mixer;
590 int err;
591
592 while (snd_ctl_find_id(mixer->chip->card, &kctl->id))
593 kctl->id.index++;
594 if ((err = snd_ctl_add(mixer->chip->card, kctl)) < 0) {
595 usb_audio_dbg(mixer->chip, "cannot add control (err = %d)\n",
596 err);
597 return err;
598 }
599 list->kctl = kctl;
600 list->next_id_elem = mixer->id_elems[list->id];
601 mixer->id_elems[list->id] = list;
602 return 0;
603 }
604
605 /*
606 * get a terminal name string
607 */
608
609 static struct iterm_name_combo {
610 int type;
611 char *name;
612 } iterm_names[] = {
613 { 0x0300, "Output" },
614 { 0x0301, "Speaker" },
615 { 0x0302, "Headphone" },
616 { 0x0303, "HMD Audio" },
617 { 0x0304, "Desktop Speaker" },
618 { 0x0305, "Room Speaker" },
619 { 0x0306, "Com Speaker" },
620 { 0x0307, "LFE" },
621 { 0x0600, "External In" },
622 { 0x0601, "Analog In" },
623 { 0x0602, "Digital In" },
624 { 0x0603, "Line" },
625 { 0x0604, "Legacy In" },
626 { 0x0605, "IEC958 In" },
627 { 0x0606, "1394 DA Stream" },
628 { 0x0607, "1394 DV Stream" },
629 { 0x0700, "Embedded" },
630 { 0x0701, "Noise Source" },
631 { 0x0702, "Equalization Noise" },
632 { 0x0703, "CD" },
633 { 0x0704, "DAT" },
634 { 0x0705, "DCC" },
635 { 0x0706, "MiniDisk" },
636 { 0x0707, "Analog Tape" },
637 { 0x0708, "Phonograph" },
638 { 0x0709, "VCR Audio" },
639 { 0x070a, "Video Disk Audio" },
640 { 0x070b, "DVD Audio" },
641 { 0x070c, "TV Tuner Audio" },
642 { 0x070d, "Satellite Rec Audio" },
643 { 0x070e, "Cable Tuner Audio" },
644 { 0x070f, "DSS Audio" },
645 { 0x0710, "Radio Receiver" },
646 { 0x0711, "Radio Transmitter" },
647 { 0x0712, "Multi-Track Recorder" },
648 { 0x0713, "Synthesizer" },
649 { 0 },
650 };
651
652 static int get_term_name(struct mixer_build *state, struct usb_audio_term *iterm,
653 unsigned char *name, int maxlen, int term_only)
654 {
655 struct iterm_name_combo *names;
656
657 if (iterm->name)
658 return snd_usb_copy_string_desc(state, iterm->name,
659 name, maxlen);
660
661 /* virtual type - not a real terminal */
662 if (iterm->type >> 16) {
663 if (term_only)
664 return 0;
665 switch (iterm->type >> 16) {
666 case UAC_SELECTOR_UNIT:
667 strcpy(name, "Selector");
668 return 8;
669 case UAC1_PROCESSING_UNIT:
670 strcpy(name, "Process Unit");
671 return 12;
672 case UAC1_EXTENSION_UNIT:
673 strcpy(name, "Ext Unit");
674 return 8;
675 case UAC_MIXER_UNIT:
676 strcpy(name, "Mixer");
677 return 5;
678 default:
679 return sprintf(name, "Unit %d", iterm->id);
680 }
681 }
682
683 switch (iterm->type & 0xff00) {
684 case 0x0100:
685 strcpy(name, "PCM");
686 return 3;
687 case 0x0200:
688 strcpy(name, "Mic");
689 return 3;
690 case 0x0400:
691 strcpy(name, "Headset");
692 return 7;
693 case 0x0500:
694 strcpy(name, "Phone");
695 return 5;
696 }
697
698 for (names = iterm_names; names->type; names++) {
699 if (names->type == iterm->type) {
700 strcpy(name, names->name);
701 return strlen(names->name);
702 }
703 }
704
705 return 0;
706 }
707
708 /*
709 * parse the source unit recursively until it reaches to a terminal
710 * or a branched unit.
711 */
712 static int check_input_term(struct mixer_build *state, int id,
713 struct usb_audio_term *term)
714 {
715 int err;
716 void *p1;
717
718 memset(term, 0, sizeof(*term));
719 while ((p1 = find_audio_control_unit(state, id)) != NULL) {
720 unsigned char *hdr = p1;
721 term->id = id;
722 switch (hdr[2]) {
723 case UAC_INPUT_TERMINAL:
724 if (state->mixer->protocol == UAC_VERSION_1) {
725 struct uac_input_terminal_descriptor *d = p1;
726 term->type = le16_to_cpu(d->wTerminalType);
727 term->channels = d->bNrChannels;
728 term->chconfig = le16_to_cpu(d->wChannelConfig);
729 term->name = d->iTerminal;
730 } else { /* UAC_VERSION_2 */
731 struct uac2_input_terminal_descriptor *d = p1;
732
733 /* call recursively to verify that the
734 * referenced clock entity is valid */
735 err = check_input_term(state, d->bCSourceID, term);
736 if (err < 0)
737 return err;
738
739 /* save input term properties after recursion,
740 * to ensure they are not overriden by the
741 * recursion calls */
742 term->id = id;
743 term->type = le16_to_cpu(d->wTerminalType);
744 term->channels = d->bNrChannels;
745 term->chconfig = le32_to_cpu(d->bmChannelConfig);
746 term->name = d->iTerminal;
747 }
748 return 0;
749 case UAC_FEATURE_UNIT: {
750 /* the header is the same for v1 and v2 */
751 struct uac_feature_unit_descriptor *d = p1;
752 id = d->bSourceID;
753 break; /* continue to parse */
754 }
755 case UAC_MIXER_UNIT: {
756 struct uac_mixer_unit_descriptor *d = p1;
757 term->type = d->bDescriptorSubtype << 16; /* virtual type */
758 term->channels = uac_mixer_unit_bNrChannels(d);
759 term->chconfig = uac_mixer_unit_wChannelConfig(d, state->mixer->protocol);
760 term->name = uac_mixer_unit_iMixer(d);
761 return 0;
762 }
763 case UAC_SELECTOR_UNIT:
764 case UAC2_CLOCK_SELECTOR: {
765 struct uac_selector_unit_descriptor *d = p1;
766 /* call recursively to retrieve the channel info */
767 err = check_input_term(state, d->baSourceID[0], term);
768 if (err < 0)
769 return err;
770 term->type = d->bDescriptorSubtype << 16; /* virtual type */
771 term->id = id;
772 term->name = uac_selector_unit_iSelector(d);
773 return 0;
774 }
775 case UAC1_PROCESSING_UNIT:
776 case UAC1_EXTENSION_UNIT:
777 /* UAC2_PROCESSING_UNIT_V2 */
778 /* UAC2_EFFECT_UNIT */
779 case UAC2_EXTENSION_UNIT_V2: {
780 struct uac_processing_unit_descriptor *d = p1;
781
782 if (state->mixer->protocol == UAC_VERSION_2 &&
783 hdr[2] == UAC2_EFFECT_UNIT) {
784 /* UAC2/UAC1 unit IDs overlap here in an
785 * uncompatible way. Ignore this unit for now.
786 */
787 return 0;
788 }
789
790 if (d->bNrInPins) {
791 id = d->baSourceID[0];
792 break; /* continue to parse */
793 }
794 term->type = d->bDescriptorSubtype << 16; /* virtual type */
795 term->channels = uac_processing_unit_bNrChannels(d);
796 term->chconfig = uac_processing_unit_wChannelConfig(d, state->mixer->protocol);
797 term->name = uac_processing_unit_iProcessing(d, state->mixer->protocol);
798 return 0;
799 }
800 case UAC2_CLOCK_SOURCE: {
801 struct uac_clock_source_descriptor *d = p1;
802 term->type = d->bDescriptorSubtype << 16; /* virtual type */
803 term->id = id;
804 term->name = d->iClockSource;
805 return 0;
806 }
807 default:
808 return -ENODEV;
809 }
810 }
811 return -ENODEV;
812 }
813
814 /*
815 * Feature Unit
816 */
817
818 /* feature unit control information */
819 struct usb_feature_control_info {
820 const char *name;
821 int type; /* data type for uac1 */
822 int type_uac2; /* data type for uac2 if different from uac1, else -1 */
823 };
824
825 static struct usb_feature_control_info audio_feature_info[] = {
826 { "Mute", USB_MIXER_INV_BOOLEAN, -1 },
827 { "Volume", USB_MIXER_S16, -1 },
828 { "Tone Control - Bass", USB_MIXER_S8, -1 },
829 { "Tone Control - Mid", USB_MIXER_S8, -1 },
830 { "Tone Control - Treble", USB_MIXER_S8, -1 },
831 { "Graphic Equalizer", USB_MIXER_S8, -1 }, /* FIXME: not implemeted yet */
832 { "Auto Gain Control", USB_MIXER_BOOLEAN, -1 },
833 { "Delay Control", USB_MIXER_U16, USB_MIXER_U32 },
834 { "Bass Boost", USB_MIXER_BOOLEAN, -1 },
835 { "Loudness", USB_MIXER_BOOLEAN, -1 },
836 /* UAC2 specific */
837 { "Input Gain Control", USB_MIXER_S16, -1 },
838 { "Input Gain Pad Control", USB_MIXER_S16, -1 },
839 { "Phase Inverter Control", USB_MIXER_BOOLEAN, -1 },
840 };
841
842 /* private_free callback */
843 void snd_usb_mixer_elem_free(struct snd_kcontrol *kctl)
844 {
845 kfree(kctl->private_data);
846 kctl->private_data = NULL;
847 }
848
849 /*
850 * interface to ALSA control for feature/mixer units
851 */
852
853 /* volume control quirks */
854 static void volume_control_quirks(struct usb_mixer_elem_info *cval,
855 struct snd_kcontrol *kctl)
856 {
857 struct snd_usb_audio *chip = cval->head.mixer->chip;
858 switch (chip->usb_id) {
859 case USB_ID(0x0763, 0x2030): /* M-Audio Fast Track C400 */
860 case USB_ID(0x0763, 0x2031): /* M-Audio Fast Track C600 */
861 if (strcmp(kctl->id.name, "Effect Duration") == 0) {
862 cval->min = 0x0000;
863 cval->max = 0xffff;
864 cval->res = 0x00e6;
865 break;
866 }
867 if (strcmp(kctl->id.name, "Effect Volume") == 0 ||
868 strcmp(kctl->id.name, "Effect Feedback Volume") == 0) {
869 cval->min = 0x00;
870 cval->max = 0xff;
871 break;
872 }
873 if (strstr(kctl->id.name, "Effect Return") != NULL) {
874 cval->min = 0xb706;
875 cval->max = 0xff7b;
876 cval->res = 0x0073;
877 break;
878 }
879 if ((strstr(kctl->id.name, "Playback Volume") != NULL) ||
880 (strstr(kctl->id.name, "Effect Send") != NULL)) {
881 cval->min = 0xb5fb; /* -73 dB = 0xb6ff */
882 cval->max = 0xfcfe;
883 cval->res = 0x0073;
884 }
885 break;
886
887 case USB_ID(0x0763, 0x2081): /* M-Audio Fast Track Ultra 8R */
888 case USB_ID(0x0763, 0x2080): /* M-Audio Fast Track Ultra */
889 if (strcmp(kctl->id.name, "Effect Duration") == 0) {
890 usb_audio_info(chip,
891 "set quirk for FTU Effect Duration\n");
892 cval->min = 0x0000;
893 cval->max = 0x7f00;
894 cval->res = 0x0100;
895 break;
896 }
897 if (strcmp(kctl->id.name, "Effect Volume") == 0 ||
898 strcmp(kctl->id.name, "Effect Feedback Volume") == 0) {
899 usb_audio_info(chip,
900 "set quirks for FTU Effect Feedback/Volume\n");
901 cval->min = 0x00;
902 cval->max = 0x7f;
903 break;
904 }
905 break;
906
907 case USB_ID(0x0d8c, 0x0103):
908 if (!strcmp(kctl->id.name, "PCM Playback Volume")) {
909 usb_audio_info(chip,
910 "set volume quirk for CM102-A+/102S+\n");
911 cval->min = -256;
912 }
913 break;
914
915 case USB_ID(0x0471, 0x0101):
916 case USB_ID(0x0471, 0x0104):
917 case USB_ID(0x0471, 0x0105):
918 case USB_ID(0x0672, 0x1041):
919 /* quirk for UDA1321/N101.
920 * note that detection between firmware 2.1.1.7 (N101)
921 * and later 2.1.1.21 is not very clear from datasheets.
922 * I hope that the min value is -15360 for newer firmware --jk
923 */
924 if (!strcmp(kctl->id.name, "PCM Playback Volume") &&
925 cval->min == -15616) {
926 usb_audio_info(chip,
927 "set volume quirk for UDA1321/N101 chip\n");
928 cval->max = -256;
929 }
930 break;
931
932 case USB_ID(0x046d, 0x09a4):
933 if (!strcmp(kctl->id.name, "Mic Capture Volume")) {
934 usb_audio_info(chip,
935 "set volume quirk for QuickCam E3500\n");
936 cval->min = 6080;
937 cval->max = 8768;
938 cval->res = 192;
939 }
940 break;
941
942 case USB_ID(0x046d, 0x0807): /* Logitech Webcam C500 */
943 case USB_ID(0x046d, 0x0808):
944 case USB_ID(0x046d, 0x0809):
945 case USB_ID(0x046d, 0x0819): /* Logitech Webcam C210 */
946 case USB_ID(0x046d, 0x081b): /* HD Webcam c310 */
947 case USB_ID(0x046d, 0x081d): /* HD Webcam c510 */
948 case USB_ID(0x046d, 0x0825): /* HD Webcam c270 */
949 case USB_ID(0x046d, 0x0826): /* HD Webcam c525 */
950 case USB_ID(0x046d, 0x08ca): /* Logitech Quickcam Fusion */
951 case USB_ID(0x046d, 0x0991):
952 case USB_ID(0x046d, 0x09a2): /* QuickCam Communicate Deluxe/S7500 */
953 /* Most audio usb devices lie about volume resolution.
954 * Most Logitech webcams have res = 384.
955 * Probably there is some logitech magic behind this number --fishor
956 */
957 if (!strcmp(kctl->id.name, "Mic Capture Volume")) {
958 usb_audio_info(chip,
959 "set resolution quirk: cval->res = 384\n");
960 cval->res = 384;
961 }
962 break;
963 }
964 }
965
966 /*
967 * retrieve the minimum and maximum values for the specified control
968 */
969 static int get_min_max_with_quirks(struct usb_mixer_elem_info *cval,
970 int default_min, struct snd_kcontrol *kctl)
971 {
972 /* for failsafe */
973 cval->min = default_min;
974 cval->max = cval->min + 1;
975 cval->res = 1;
976 cval->dBmin = cval->dBmax = 0;
977
978 if (cval->val_type == USB_MIXER_BOOLEAN ||
979 cval->val_type == USB_MIXER_INV_BOOLEAN) {
980 cval->initialized = 1;
981 } else {
982 int minchn = 0;
983 if (cval->cmask) {
984 int i;
985 for (i = 0; i < MAX_CHANNELS; i++)
986 if (cval->cmask & (1 << i)) {
987 minchn = i + 1;
988 break;
989 }
990 }
991 if (get_ctl_value(cval, UAC_GET_MAX, (cval->control << 8) | minchn, &cval->max) < 0 ||
992 get_ctl_value(cval, UAC_GET_MIN, (cval->control << 8) | minchn, &cval->min) < 0) {
993 usb_audio_err(cval->head.mixer->chip,
994 "%d:%d: cannot get min/max values for control %d (id %d)\n",
995 cval->head.id, snd_usb_ctrl_intf(cval->head.mixer->chip),
996 cval->control, cval->head.id);
997 return -EINVAL;
998 }
999 if (get_ctl_value(cval, UAC_GET_RES,
1000 (cval->control << 8) | minchn,
1001 &cval->res) < 0) {
1002 cval->res = 1;
1003 } else {
1004 int last_valid_res = cval->res;
1005
1006 while (cval->res > 1) {
1007 if (snd_usb_mixer_set_ctl_value(cval, UAC_SET_RES,
1008 (cval->control << 8) | minchn,
1009 cval->res / 2) < 0)
1010 break;
1011 cval->res /= 2;
1012 }
1013 if (get_ctl_value(cval, UAC_GET_RES,
1014 (cval->control << 8) | minchn, &cval->res) < 0)
1015 cval->res = last_valid_res;
1016 }
1017 if (cval->res == 0)
1018 cval->res = 1;
1019
1020 /* Additional checks for the proper resolution
1021 *
1022 * Some devices report smaller resolutions than actually
1023 * reacting. They don't return errors but simply clip
1024 * to the lower aligned value.
1025 */
1026 if (cval->min + cval->res < cval->max) {
1027 int last_valid_res = cval->res;
1028 int saved, test, check;
1029 get_cur_mix_raw(cval, minchn, &saved);
1030 for (;;) {
1031 test = saved;
1032 if (test < cval->max)
1033 test += cval->res;
1034 else
1035 test -= cval->res;
1036 if (test < cval->min || test > cval->max ||
1037 snd_usb_set_cur_mix_value(cval, minchn, 0, test) ||
1038 get_cur_mix_raw(cval, minchn, &check)) {
1039 cval->res = last_valid_res;
1040 break;
1041 }
1042 if (test == check)
1043 break;
1044 cval->res *= 2;
1045 }
1046 snd_usb_set_cur_mix_value(cval, minchn, 0, saved);
1047 }
1048
1049 cval->initialized = 1;
1050 }
1051
1052 if (kctl)
1053 volume_control_quirks(cval, kctl);
1054
1055 /* USB descriptions contain the dB scale in 1/256 dB unit
1056 * while ALSA TLV contains in 1/100 dB unit
1057 */
1058 cval->dBmin = (convert_signed_value(cval, cval->min) * 100) / 256;
1059 cval->dBmax = (convert_signed_value(cval, cval->max) * 100) / 256;
1060 if (cval->dBmin > cval->dBmax) {
1061 /* something is wrong; assume it's either from/to 0dB */
1062 if (cval->dBmin < 0)
1063 cval->dBmax = 0;
1064 else if (cval->dBmin > 0)
1065 cval->dBmin = 0;
1066 if (cval->dBmin > cval->dBmax) {
1067 /* totally crap, return an error */
1068 return -EINVAL;
1069 }
1070 }
1071
1072 return 0;
1073 }
1074
1075 #define get_min_max(cval, def) get_min_max_with_quirks(cval, def, NULL)
1076
1077 /* get a feature/mixer unit info */
1078 static int mixer_ctl_feature_info(struct snd_kcontrol *kcontrol,
1079 struct snd_ctl_elem_info *uinfo)
1080 {
1081 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1082
1083 if (cval->val_type == USB_MIXER_BOOLEAN ||
1084 cval->val_type == USB_MIXER_INV_BOOLEAN)
1085 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1086 else
1087 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
1088 uinfo->count = cval->channels;
1089 if (cval->val_type == USB_MIXER_BOOLEAN ||
1090 cval->val_type == USB_MIXER_INV_BOOLEAN) {
1091 uinfo->value.integer.min = 0;
1092 uinfo->value.integer.max = 1;
1093 } else {
1094 if (!cval->initialized) {
1095 get_min_max_with_quirks(cval, 0, kcontrol);
1096 if (cval->initialized && cval->dBmin >= cval->dBmax) {
1097 kcontrol->vd[0].access &=
1098 ~(SNDRV_CTL_ELEM_ACCESS_TLV_READ |
1099 SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK);
1100 snd_ctl_notify(cval->head.mixer->chip->card,
1101 SNDRV_CTL_EVENT_MASK_INFO,
1102 &kcontrol->id);
1103 }
1104 }
1105 uinfo->value.integer.min = 0;
1106 uinfo->value.integer.max =
1107 (cval->max - cval->min + cval->res - 1) / cval->res;
1108 }
1109 return 0;
1110 }
1111
1112 /* get the current value from feature/mixer unit */
1113 static int mixer_ctl_feature_get(struct snd_kcontrol *kcontrol,
1114 struct snd_ctl_elem_value *ucontrol)
1115 {
1116 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1117 int c, cnt, val, err;
1118
1119 ucontrol->value.integer.value[0] = cval->min;
1120 if (cval->cmask) {
1121 cnt = 0;
1122 for (c = 0; c < MAX_CHANNELS; c++) {
1123 if (!(cval->cmask & (1 << c)))
1124 continue;
1125 err = snd_usb_get_cur_mix_value(cval, c + 1, cnt, &val);
1126 if (err < 0)
1127 return filter_error(cval, err);
1128 val = get_relative_value(cval, val);
1129 ucontrol->value.integer.value[cnt] = val;
1130 cnt++;
1131 }
1132 return 0;
1133 } else {
1134 /* master channel */
1135 err = snd_usb_get_cur_mix_value(cval, 0, 0, &val);
1136 if (err < 0)
1137 return filter_error(cval, err);
1138 val = get_relative_value(cval, val);
1139 ucontrol->value.integer.value[0] = val;
1140 }
1141 return 0;
1142 }
1143
1144 /* put the current value to feature/mixer unit */
1145 static int mixer_ctl_feature_put(struct snd_kcontrol *kcontrol,
1146 struct snd_ctl_elem_value *ucontrol)
1147 {
1148 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1149 int c, cnt, val, oval, err;
1150 int changed = 0;
1151
1152 if (cval->cmask) {
1153 cnt = 0;
1154 for (c = 0; c < MAX_CHANNELS; c++) {
1155 if (!(cval->cmask & (1 << c)))
1156 continue;
1157 err = snd_usb_get_cur_mix_value(cval, c + 1, cnt, &oval);
1158 if (err < 0)
1159 return filter_error(cval, err);
1160 val = ucontrol->value.integer.value[cnt];
1161 val = get_abs_value(cval, val);
1162 if (oval != val) {
1163 snd_usb_set_cur_mix_value(cval, c + 1, cnt, val);
1164 changed = 1;
1165 }
1166 cnt++;
1167 }
1168 } else {
1169 /* master channel */
1170 err = snd_usb_get_cur_mix_value(cval, 0, 0, &oval);
1171 if (err < 0)
1172 return filter_error(cval, err);
1173 val = ucontrol->value.integer.value[0];
1174 val = get_abs_value(cval, val);
1175 if (val != oval) {
1176 snd_usb_set_cur_mix_value(cval, 0, 0, val);
1177 changed = 1;
1178 }
1179 }
1180 return changed;
1181 }
1182
1183 static struct snd_kcontrol_new usb_feature_unit_ctl = {
1184 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1185 .name = "", /* will be filled later manually */
1186 .info = mixer_ctl_feature_info,
1187 .get = mixer_ctl_feature_get,
1188 .put = mixer_ctl_feature_put,
1189 };
1190
1191 /* the read-only variant */
1192 static struct snd_kcontrol_new usb_feature_unit_ctl_ro = {
1193 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1194 .name = "", /* will be filled later manually */
1195 .info = mixer_ctl_feature_info,
1196 .get = mixer_ctl_feature_get,
1197 .put = NULL,
1198 };
1199
1200 /*
1201 * This symbol is exported in order to allow the mixer quirks to
1202 * hook up to the standard feature unit control mechanism
1203 */
1204 struct snd_kcontrol_new *snd_usb_feature_unit_ctl = &usb_feature_unit_ctl;
1205
1206 /*
1207 * build a feature control
1208 */
1209 static size_t append_ctl_name(struct snd_kcontrol *kctl, const char *str)
1210 {
1211 return strlcat(kctl->id.name, str, sizeof(kctl->id.name));
1212 }
1213
1214 /*
1215 * A lot of headsets/headphones have a "Speaker" mixer. Make sure we
1216 * rename it to "Headphone". We determine if something is a headphone
1217 * similar to how udev determines form factor.
1218 */
1219 static void check_no_speaker_on_headset(struct snd_kcontrol *kctl,
1220 struct snd_card *card)
1221 {
1222 const char *names_to_check[] = {
1223 "Headset", "headset", "Headphone", "headphone", NULL};
1224 const char **s;
1225 bool found = false;
1226
1227 if (strcmp("Speaker", kctl->id.name))
1228 return;
1229
1230 for (s = names_to_check; *s; s++)
1231 if (strstr(card->shortname, *s)) {
1232 found = true;
1233 break;
1234 }
1235
1236 if (!found)
1237 return;
1238
1239 strlcpy(kctl->id.name, "Headphone", sizeof(kctl->id.name));
1240 }
1241
1242 static void build_feature_ctl(struct mixer_build *state, void *raw_desc,
1243 unsigned int ctl_mask, int control,
1244 struct usb_audio_term *iterm, int unitid,
1245 int readonly_mask)
1246 {
1247 struct uac_feature_unit_descriptor *desc = raw_desc;
1248 struct usb_feature_control_info *ctl_info;
1249 unsigned int len = 0;
1250 int mapped_name = 0;
1251 int nameid = uac_feature_unit_iFeature(desc);
1252 struct snd_kcontrol *kctl;
1253 struct usb_mixer_elem_info *cval;
1254 const struct usbmix_name_map *map;
1255 unsigned int range;
1256
1257 control++; /* change from zero-based to 1-based value */
1258
1259 if (control == UAC_FU_GRAPHIC_EQUALIZER) {
1260 /* FIXME: not supported yet */
1261 return;
1262 }
1263
1264 map = find_map(state, unitid, control);
1265 if (check_ignored_ctl(map))
1266 return;
1267
1268 cval = kzalloc(sizeof(*cval), GFP_KERNEL);
1269 if (!cval)
1270 return;
1271 snd_usb_mixer_elem_init_std(&cval->head, state->mixer, unitid);
1272 cval->control = control;
1273 cval->cmask = ctl_mask;
1274 ctl_info = &audio_feature_info[control-1];
1275 if (state->mixer->protocol == UAC_VERSION_1)
1276 cval->val_type = ctl_info->type;
1277 else /* UAC_VERSION_2 */
1278 cval->val_type = ctl_info->type_uac2 >= 0 ?
1279 ctl_info->type_uac2 : ctl_info->type;
1280
1281 if (ctl_mask == 0) {
1282 cval->channels = 1; /* master channel */
1283 cval->master_readonly = readonly_mask;
1284 } else {
1285 int i, c = 0;
1286 for (i = 0; i < 16; i++)
1287 if (ctl_mask & (1 << i))
1288 c++;
1289 cval->channels = c;
1290 cval->ch_readonly = readonly_mask;
1291 }
1292
1293 /*
1294 * If all channels in the mask are marked read-only, make the control
1295 * read-only. snd_usb_set_cur_mix_value() will check the mask again and won't
1296 * issue write commands to read-only channels.
1297 */
1298 if (cval->channels == readonly_mask)
1299 kctl = snd_ctl_new1(&usb_feature_unit_ctl_ro, cval);
1300 else
1301 kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval);
1302
1303 if (!kctl) {
1304 usb_audio_err(state->chip, "cannot malloc kcontrol\n");
1305 kfree(cval);
1306 return;
1307 }
1308 kctl->private_free = snd_usb_mixer_elem_free;
1309
1310 len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name));
1311 mapped_name = len != 0;
1312 if (!len && nameid)
1313 len = snd_usb_copy_string_desc(state, nameid,
1314 kctl->id.name, sizeof(kctl->id.name));
1315
1316 switch (control) {
1317 case UAC_FU_MUTE:
1318 case UAC_FU_VOLUME:
1319 /*
1320 * determine the control name. the rule is:
1321 * - if a name id is given in descriptor, use it.
1322 * - if the connected input can be determined, then use the name
1323 * of terminal type.
1324 * - if the connected output can be determined, use it.
1325 * - otherwise, anonymous name.
1326 */
1327 if (!len) {
1328 len = get_term_name(state, iterm, kctl->id.name,
1329 sizeof(kctl->id.name), 1);
1330 if (!len)
1331 len = get_term_name(state, &state->oterm,
1332 kctl->id.name,
1333 sizeof(kctl->id.name), 1);
1334 if (!len)
1335 snprintf(kctl->id.name, sizeof(kctl->id.name),
1336 "Feature %d", unitid);
1337 }
1338
1339 if (!mapped_name)
1340 check_no_speaker_on_headset(kctl, state->mixer->chip->card);
1341
1342 /*
1343 * determine the stream direction:
1344 * if the connected output is USB stream, then it's likely a
1345 * capture stream. otherwise it should be playback (hopefully :)
1346 */
1347 if (!mapped_name && !(state->oterm.type >> 16)) {
1348 if ((state->oterm.type & 0xff00) == 0x0100)
1349 append_ctl_name(kctl, " Capture");
1350 else
1351 append_ctl_name(kctl, " Playback");
1352 }
1353 append_ctl_name(kctl, control == UAC_FU_MUTE ?
1354 " Switch" : " Volume");
1355 break;
1356 default:
1357 if (!len)
1358 strlcpy(kctl->id.name, audio_feature_info[control-1].name,
1359 sizeof(kctl->id.name));
1360 break;
1361 }
1362
1363 /* get min/max values */
1364 get_min_max_with_quirks(cval, 0, kctl);
1365
1366 if (control == UAC_FU_VOLUME) {
1367 check_mapped_dB(map, cval);
1368 if (cval->dBmin < cval->dBmax || !cval->initialized) {
1369 kctl->tlv.c = snd_usb_mixer_vol_tlv;
1370 kctl->vd[0].access |=
1371 SNDRV_CTL_ELEM_ACCESS_TLV_READ |
1372 SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK;
1373 }
1374 }
1375
1376 snd_usb_mixer_fu_apply_quirk(state->mixer, cval, unitid, kctl);
1377
1378 range = (cval->max - cval->min) / cval->res;
1379 /*
1380 * Are there devices with volume range more than 255? I use a bit more
1381 * to be sure. 384 is a resolution magic number found on Logitech
1382 * devices. It will definitively catch all buggy Logitech devices.
1383 */
1384 if (range > 384) {
1385 usb_audio_warn(state->chip,
1386 "Warning! Unlikely big volume range (=%u), cval->res is probably wrong.",
1387 range);
1388 usb_audio_warn(state->chip,
1389 "[%d] FU [%s] ch = %d, val = %d/%d/%d",
1390 cval->head.id, kctl->id.name, cval->channels,
1391 cval->min, cval->max, cval->res);
1392 }
1393
1394 usb_audio_dbg(state->chip, "[%d] FU [%s] ch = %d, val = %d/%d/%d\n",
1395 cval->head.id, kctl->id.name, cval->channels,
1396 cval->min, cval->max, cval->res);
1397 snd_usb_mixer_add_control(&cval->head, kctl);
1398 }
1399
1400 /*
1401 * parse a feature unit
1402 *
1403 * most of controls are defined here.
1404 */
1405 static int parse_audio_feature_unit(struct mixer_build *state, int unitid,
1406 void *_ftr)
1407 {
1408 int channels, i, j;
1409 struct usb_audio_term iterm;
1410 unsigned int master_bits, first_ch_bits;
1411 int err, csize;
1412 struct uac_feature_unit_descriptor *hdr = _ftr;
1413 __u8 *bmaControls;
1414
1415 if (state->mixer->protocol == UAC_VERSION_1) {
1416 if (hdr->bLength < 7) {
1417 usb_audio_err(state->chip,
1418 "unit %u: invalid UAC_FEATURE_UNIT descriptor\n",
1419 unitid);
1420 return -EINVAL;
1421 }
1422 csize = hdr->bControlSize;
1423 if (!csize) {
1424 usb_audio_dbg(state->chip,
1425 "unit %u: invalid bControlSize == 0\n",
1426 unitid);
1427 return -EINVAL;
1428 }
1429 channels = (hdr->bLength - 7) / csize - 1;
1430 bmaControls = hdr->bmaControls;
1431 if (hdr->bLength < 7 + csize) {
1432 usb_audio_err(state->chip,
1433 "unit %u: invalid UAC_FEATURE_UNIT descriptor\n",
1434 unitid);
1435 return -EINVAL;
1436 }
1437 } else {
1438 struct uac2_feature_unit_descriptor *ftr = _ftr;
1439 if (hdr->bLength < 6) {
1440 usb_audio_err(state->chip,
1441 "unit %u: invalid UAC_FEATURE_UNIT descriptor\n",
1442 unitid);
1443 return -EINVAL;
1444 }
1445 csize = 4;
1446 channels = (hdr->bLength - 6) / 4 - 1;
1447 bmaControls = ftr->bmaControls;
1448 if (hdr->bLength < 6 + csize) {
1449 usb_audio_err(state->chip,
1450 "unit %u: invalid UAC_FEATURE_UNIT descriptor\n",
1451 unitid);
1452 return -EINVAL;
1453 }
1454 }
1455
1456 /* parse the source unit */
1457 if ((err = parse_audio_unit(state, hdr->bSourceID)) < 0)
1458 return err;
1459
1460 /* determine the input source type and name */
1461 err = check_input_term(state, hdr->bSourceID, &iterm);
1462 if (err < 0)
1463 return err;
1464
1465 master_bits = snd_usb_combine_bytes(bmaControls, csize);
1466 /* master configuration quirks */
1467 switch (state->chip->usb_id) {
1468 case USB_ID(0x08bb, 0x2702):
1469 usb_audio_info(state->chip,
1470 "usbmixer: master volume quirk for PCM2702 chip\n");
1471 /* disable non-functional volume control */
1472 master_bits &= ~UAC_CONTROL_BIT(UAC_FU_VOLUME);
1473 break;
1474 case USB_ID(0x1130, 0xf211):
1475 usb_audio_info(state->chip,
1476 "usbmixer: volume control quirk for Tenx TP6911 Audio Headset\n");
1477 /* disable non-functional volume control */
1478 channels = 0;
1479 break;
1480
1481 }
1482 if (channels > 0)
1483 first_ch_bits = snd_usb_combine_bytes(bmaControls + csize, csize);
1484 else
1485 first_ch_bits = 0;
1486
1487 if (state->mixer->protocol == UAC_VERSION_1) {
1488 /* check all control types */
1489 for (i = 0; i < 10; i++) {
1490 unsigned int ch_bits = 0;
1491 for (j = 0; j < channels; j++) {
1492 unsigned int mask;
1493
1494 mask = snd_usb_combine_bytes(bmaControls +
1495 csize * (j+1), csize);
1496 if (mask & (1 << i))
1497 ch_bits |= (1 << j);
1498 }
1499 /* audio class v1 controls are never read-only */
1500
1501 /*
1502 * The first channel must be set
1503 * (for ease of programming).
1504 */
1505 if (ch_bits & 1)
1506 build_feature_ctl(state, _ftr, ch_bits, i,
1507 &iterm, unitid, 0);
1508 if (master_bits & (1 << i))
1509 build_feature_ctl(state, _ftr, 0, i, &iterm,
1510 unitid, 0);
1511 }
1512 } else { /* UAC_VERSION_2 */
1513 for (i = 0; i < ARRAY_SIZE(audio_feature_info); i++) {
1514 unsigned int ch_bits = 0;
1515 unsigned int ch_read_only = 0;
1516
1517 for (j = 0; j < channels; j++) {
1518 unsigned int mask;
1519
1520 mask = snd_usb_combine_bytes(bmaControls +
1521 csize * (j+1), csize);
1522 if (uac2_control_is_readable(mask, i)) {
1523 ch_bits |= (1 << j);
1524 if (!uac2_control_is_writeable(mask, i))
1525 ch_read_only |= (1 << j);
1526 }
1527 }
1528
1529 /*
1530 * NOTE: build_feature_ctl() will mark the control
1531 * read-only if all channels are marked read-only in
1532 * the descriptors. Otherwise, the control will be
1533 * reported as writeable, but the driver will not
1534 * actually issue a write command for read-only
1535 * channels.
1536 */
1537
1538 /*
1539 * The first channel must be set
1540 * (for ease of programming).
1541 */
1542 if (ch_bits & 1)
1543 build_feature_ctl(state, _ftr, ch_bits, i,
1544 &iterm, unitid, ch_read_only);
1545 if (uac2_control_is_readable(master_bits, i))
1546 build_feature_ctl(state, _ftr, 0, i, &iterm, unitid,
1547 !uac2_control_is_writeable(master_bits, i));
1548 }
1549 }
1550
1551 return 0;
1552 }
1553
1554 /*
1555 * Mixer Unit
1556 */
1557
1558 /*
1559 * build a mixer unit control
1560 *
1561 * the callbacks are identical with feature unit.
1562 * input channel number (zero based) is given in control field instead.
1563 */
1564 static void build_mixer_unit_ctl(struct mixer_build *state,
1565 struct uac_mixer_unit_descriptor *desc,
1566 int in_pin, int in_ch, int unitid,
1567 struct usb_audio_term *iterm)
1568 {
1569 struct usb_mixer_elem_info *cval;
1570 unsigned int num_outs = uac_mixer_unit_bNrChannels(desc);
1571 unsigned int i, len;
1572 struct snd_kcontrol *kctl;
1573 const struct usbmix_name_map *map;
1574
1575 map = find_map(state, unitid, 0);
1576 if (check_ignored_ctl(map))
1577 return;
1578
1579 cval = kzalloc(sizeof(*cval), GFP_KERNEL);
1580 if (!cval)
1581 return;
1582
1583 snd_usb_mixer_elem_init_std(&cval->head, state->mixer, unitid);
1584 cval->control = in_ch + 1; /* based on 1 */
1585 cval->val_type = USB_MIXER_S16;
1586 for (i = 0; i < num_outs; i++) {
1587 __u8 *c = uac_mixer_unit_bmControls(desc, state->mixer->protocol);
1588
1589 if (check_matrix_bitmap(c, in_ch, i, num_outs)) {
1590 cval->cmask |= (1 << i);
1591 cval->channels++;
1592 }
1593 }
1594
1595 /* get min/max values */
1596 get_min_max(cval, 0);
1597
1598 kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval);
1599 if (!kctl) {
1600 usb_audio_err(state->chip, "cannot malloc kcontrol\n");
1601 kfree(cval);
1602 return;
1603 }
1604 kctl->private_free = snd_usb_mixer_elem_free;
1605
1606 len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name));
1607 if (!len)
1608 len = get_term_name(state, iterm, kctl->id.name,
1609 sizeof(kctl->id.name), 0);
1610 if (!len)
1611 len = sprintf(kctl->id.name, "Mixer Source %d", in_ch + 1);
1612 append_ctl_name(kctl, " Volume");
1613
1614 usb_audio_dbg(state->chip, "[%d] MU [%s] ch = %d, val = %d/%d\n",
1615 cval->head.id, kctl->id.name, cval->channels, cval->min, cval->max);
1616 snd_usb_mixer_add_control(&cval->head, kctl);
1617 }
1618
1619 /*
1620 * parse a mixer unit
1621 */
1622 static int parse_audio_mixer_unit(struct mixer_build *state, int unitid,
1623 void *raw_desc)
1624 {
1625 struct uac_mixer_unit_descriptor *desc = raw_desc;
1626 struct usb_audio_term iterm;
1627 int input_pins, num_ins, num_outs;
1628 int pin, ich, err;
1629
1630 if (desc->bLength < 11 || !(input_pins = desc->bNrInPins) ||
1631 !(num_outs = uac_mixer_unit_bNrChannels(desc))) {
1632 usb_audio_err(state->chip,
1633 "invalid MIXER UNIT descriptor %d\n",
1634 unitid);
1635 return -EINVAL;
1636 }
1637
1638 num_ins = 0;
1639 ich = 0;
1640 for (pin = 0; pin < input_pins; pin++) {
1641 err = parse_audio_unit(state, desc->baSourceID[pin]);
1642 if (err < 0)
1643 continue;
1644 /* no bmControls field (e.g. Maya44) -> ignore */
1645 if (desc->bLength <= 10 + input_pins)
1646 continue;
1647 err = check_input_term(state, desc->baSourceID[pin], &iterm);
1648 if (err < 0)
1649 return err;
1650 num_ins += iterm.channels;
1651 for (; ich < num_ins; ich++) {
1652 int och, ich_has_controls = 0;
1653
1654 for (och = 0; och < num_outs; och++) {
1655 __u8 *c = uac_mixer_unit_bmControls(desc,
1656 state->mixer->protocol);
1657
1658 if (check_matrix_bitmap(c, ich, och, num_outs)) {
1659 ich_has_controls = 1;
1660 break;
1661 }
1662 }
1663 if (ich_has_controls)
1664 build_mixer_unit_ctl(state, desc, pin, ich,
1665 unitid, &iterm);
1666 }
1667 }
1668 return 0;
1669 }
1670
1671 /*
1672 * Processing Unit / Extension Unit
1673 */
1674
1675 /* get callback for processing/extension unit */
1676 static int mixer_ctl_procunit_get(struct snd_kcontrol *kcontrol,
1677 struct snd_ctl_elem_value *ucontrol)
1678 {
1679 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1680 int err, val;
1681
1682 err = get_cur_ctl_value(cval, cval->control << 8, &val);
1683 if (err < 0) {
1684 ucontrol->value.integer.value[0] = cval->min;
1685 return filter_error(cval, err);
1686 }
1687 val = get_relative_value(cval, val);
1688 ucontrol->value.integer.value[0] = val;
1689 return 0;
1690 }
1691
1692 /* put callback for processing/extension unit */
1693 static int mixer_ctl_procunit_put(struct snd_kcontrol *kcontrol,
1694 struct snd_ctl_elem_value *ucontrol)
1695 {
1696 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1697 int val, oval, err;
1698
1699 err = get_cur_ctl_value(cval, cval->control << 8, &oval);
1700 if (err < 0)
1701 return filter_error(cval, err);
1702 val = ucontrol->value.integer.value[0];
1703 val = get_abs_value(cval, val);
1704 if (val != oval) {
1705 set_cur_ctl_value(cval, cval->control << 8, val);
1706 return 1;
1707 }
1708 return 0;
1709 }
1710
1711 /* alsa control interface for processing/extension unit */
1712 static struct snd_kcontrol_new mixer_procunit_ctl = {
1713 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1714 .name = "", /* will be filled later */
1715 .info = mixer_ctl_feature_info,
1716 .get = mixer_ctl_procunit_get,
1717 .put = mixer_ctl_procunit_put,
1718 };
1719
1720 /*
1721 * predefined data for processing units
1722 */
1723 struct procunit_value_info {
1724 int control;
1725 char *suffix;
1726 int val_type;
1727 int min_value;
1728 };
1729
1730 struct procunit_info {
1731 int type;
1732 char *name;
1733 struct procunit_value_info *values;
1734 };
1735
1736 static struct procunit_value_info updown_proc_info[] = {
1737 { UAC_UD_ENABLE, "Switch", USB_MIXER_BOOLEAN },
1738 { UAC_UD_MODE_SELECT, "Mode Select", USB_MIXER_U8, 1 },
1739 { 0 }
1740 };
1741 static struct procunit_value_info prologic_proc_info[] = {
1742 { UAC_DP_ENABLE, "Switch", USB_MIXER_BOOLEAN },
1743 { UAC_DP_MODE_SELECT, "Mode Select", USB_MIXER_U8, 1 },
1744 { 0 }
1745 };
1746 static struct procunit_value_info threed_enh_proc_info[] = {
1747 { UAC_3D_ENABLE, "Switch", USB_MIXER_BOOLEAN },
1748 { UAC_3D_SPACE, "Spaciousness", USB_MIXER_U8 },
1749 { 0 }
1750 };
1751 static struct procunit_value_info reverb_proc_info[] = {
1752 { UAC_REVERB_ENABLE, "Switch", USB_MIXER_BOOLEAN },
1753 { UAC_REVERB_LEVEL, "Level", USB_MIXER_U8 },
1754 { UAC_REVERB_TIME, "Time", USB_MIXER_U16 },
1755 { UAC_REVERB_FEEDBACK, "Feedback", USB_MIXER_U8 },
1756 { 0 }
1757 };
1758 static struct procunit_value_info chorus_proc_info[] = {
1759 { UAC_CHORUS_ENABLE, "Switch", USB_MIXER_BOOLEAN },
1760 { UAC_CHORUS_LEVEL, "Level", USB_MIXER_U8 },
1761 { UAC_CHORUS_RATE, "Rate", USB_MIXER_U16 },
1762 { UAC_CHORUS_DEPTH, "Depth", USB_MIXER_U16 },
1763 { 0 }
1764 };
1765 static struct procunit_value_info dcr_proc_info[] = {
1766 { UAC_DCR_ENABLE, "Switch", USB_MIXER_BOOLEAN },
1767 { UAC_DCR_RATE, "Ratio", USB_MIXER_U16 },
1768 { UAC_DCR_MAXAMPL, "Max Amp", USB_MIXER_S16 },
1769 { UAC_DCR_THRESHOLD, "Threshold", USB_MIXER_S16 },
1770 { UAC_DCR_ATTACK_TIME, "Attack Time", USB_MIXER_U16 },
1771 { UAC_DCR_RELEASE_TIME, "Release Time", USB_MIXER_U16 },
1772 { 0 }
1773 };
1774
1775 static struct procunit_info procunits[] = {
1776 { UAC_PROCESS_UP_DOWNMIX, "Up Down", updown_proc_info },
1777 { UAC_PROCESS_DOLBY_PROLOGIC, "Dolby Prologic", prologic_proc_info },
1778 { UAC_PROCESS_STEREO_EXTENDER, "3D Stereo Extender", threed_enh_proc_info },
1779 { UAC_PROCESS_REVERB, "Reverb", reverb_proc_info },
1780 { UAC_PROCESS_CHORUS, "Chorus", chorus_proc_info },
1781 { UAC_PROCESS_DYN_RANGE_COMP, "DCR", dcr_proc_info },
1782 { 0 },
1783 };
1784 /*
1785 * predefined data for extension units
1786 */
1787 static struct procunit_value_info clock_rate_xu_info[] = {
1788 { USB_XU_CLOCK_RATE_SELECTOR, "Selector", USB_MIXER_U8, 0 },
1789 { 0 }
1790 };
1791 static struct procunit_value_info clock_source_xu_info[] = {
1792 { USB_XU_CLOCK_SOURCE_SELECTOR, "External", USB_MIXER_BOOLEAN },
1793 { 0 }
1794 };
1795 static struct procunit_value_info spdif_format_xu_info[] = {
1796 { USB_XU_DIGITAL_FORMAT_SELECTOR, "SPDIF/AC3", USB_MIXER_BOOLEAN },
1797 { 0 }
1798 };
1799 static struct procunit_value_info soft_limit_xu_info[] = {
1800 { USB_XU_SOFT_LIMIT_SELECTOR, " ", USB_MIXER_BOOLEAN },
1801 { 0 }
1802 };
1803 static struct procunit_info extunits[] = {
1804 { USB_XU_CLOCK_RATE, "Clock rate", clock_rate_xu_info },
1805 { USB_XU_CLOCK_SOURCE, "DigitalIn CLK source", clock_source_xu_info },
1806 { USB_XU_DIGITAL_IO_STATUS, "DigitalOut format:", spdif_format_xu_info },
1807 { USB_XU_DEVICE_OPTIONS, "AnalogueIn Soft Limit", soft_limit_xu_info },
1808 { 0 }
1809 };
1810
1811 /*
1812 * build a processing/extension unit
1813 */
1814 static int build_audio_procunit(struct mixer_build *state, int unitid,
1815 void *raw_desc, struct procunit_info *list,
1816 char *name)
1817 {
1818 struct uac_processing_unit_descriptor *desc = raw_desc;
1819 int num_ins;
1820 struct usb_mixer_elem_info *cval;
1821 struct snd_kcontrol *kctl;
1822 int i, err, nameid, type, len;
1823 struct procunit_info *info;
1824 struct procunit_value_info *valinfo;
1825 const struct usbmix_name_map *map;
1826 static struct procunit_value_info default_value_info[] = {
1827 { 0x01, "Switch", USB_MIXER_BOOLEAN },
1828 { 0 }
1829 };
1830 static struct procunit_info default_info = {
1831 0, NULL, default_value_info
1832 };
1833
1834 if (desc->bLength < 13) {
1835 usb_audio_err(state->chip, "invalid %s descriptor (id %d)\n", name, unitid);
1836 return -EINVAL;
1837 }
1838
1839 num_ins = desc->bNrInPins;
1840 if (desc->bLength < 13 + num_ins ||
1841 desc->bLength < num_ins + uac_processing_unit_bControlSize(desc, state->mixer->protocol)) {
1842 usb_audio_err(state->chip, "invalid %s descriptor (id %d)\n", name, unitid);
1843 return -EINVAL;
1844 }
1845
1846 for (i = 0; i < num_ins; i++) {
1847 if ((err = parse_audio_unit(state, desc->baSourceID[i])) < 0)
1848 return err;
1849 }
1850
1851 type = le16_to_cpu(desc->wProcessType);
1852 for (info = list; info && info->type; info++)
1853 if (info->type == type)
1854 break;
1855 if (!info || !info->type)
1856 info = &default_info;
1857
1858 for (valinfo = info->values; valinfo->control; valinfo++) {
1859 __u8 *controls = uac_processing_unit_bmControls(desc, state->mixer->protocol);
1860
1861 if (!(controls[valinfo->control / 8] & (1 << ((valinfo->control % 8) - 1))))
1862 continue;
1863 map = find_map(state, unitid, valinfo->control);
1864 if (check_ignored_ctl(map))
1865 continue;
1866 cval = kzalloc(sizeof(*cval), GFP_KERNEL);
1867 if (!cval)
1868 return -ENOMEM;
1869 snd_usb_mixer_elem_init_std(&cval->head, state->mixer, unitid);
1870 cval->control = valinfo->control;
1871 cval->val_type = valinfo->val_type;
1872 cval->channels = 1;
1873
1874 /* get min/max values */
1875 if (type == UAC_PROCESS_UP_DOWNMIX && cval->control == UAC_UD_MODE_SELECT) {
1876 __u8 *control_spec = uac_processing_unit_specific(desc, state->mixer->protocol);
1877 /* FIXME: hard-coded */
1878 cval->min = 1;
1879 cval->max = control_spec[0];
1880 cval->res = 1;
1881 cval->initialized = 1;
1882 } else {
1883 if (type == USB_XU_CLOCK_RATE) {
1884 /*
1885 * E-Mu USB 0404/0202/TrackerPre/0204
1886 * samplerate control quirk
1887 */
1888 cval->min = 0;
1889 cval->max = 5;
1890 cval->res = 1;
1891 cval->initialized = 1;
1892 } else
1893 get_min_max(cval, valinfo->min_value);
1894 }
1895
1896 kctl = snd_ctl_new1(&mixer_procunit_ctl, cval);
1897 if (!kctl) {
1898 kfree(cval);
1899 return -ENOMEM;
1900 }
1901 kctl->private_free = snd_usb_mixer_elem_free;
1902
1903 if (check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name))) {
1904 /* nothing */ ;
1905 } else if (info->name) {
1906 strlcpy(kctl->id.name, info->name, sizeof(kctl->id.name));
1907 } else {
1908 nameid = uac_processing_unit_iProcessing(desc, state->mixer->protocol);
1909 len = 0;
1910 if (nameid)
1911 len = snd_usb_copy_string_desc(state, nameid,
1912 kctl->id.name,
1913 sizeof(kctl->id.name));
1914 if (!len)
1915 strlcpy(kctl->id.name, name, sizeof(kctl->id.name));
1916 }
1917 append_ctl_name(kctl, " ");
1918 append_ctl_name(kctl, valinfo->suffix);
1919
1920 usb_audio_dbg(state->chip,
1921 "[%d] PU [%s] ch = %d, val = %d/%d\n",
1922 cval->head.id, kctl->id.name, cval->channels,
1923 cval->min, cval->max);
1924
1925 err = snd_usb_mixer_add_control(&cval->head, kctl);
1926 if (err < 0)
1927 return err;
1928 }
1929 return 0;
1930 }
1931
1932 static int parse_audio_processing_unit(struct mixer_build *state, int unitid,
1933 void *raw_desc)
1934 {
1935 return build_audio_procunit(state, unitid, raw_desc,
1936 procunits, "Processing Unit");
1937 }
1938
1939 static int parse_audio_extension_unit(struct mixer_build *state, int unitid,
1940 void *raw_desc)
1941 {
1942 /*
1943 * Note that we parse extension units with processing unit descriptors.
1944 * That's ok as the layout is the same.
1945 */
1946 return build_audio_procunit(state, unitid, raw_desc,
1947 extunits, "Extension Unit");
1948 }
1949
1950 /*
1951 * Selector Unit
1952 */
1953
1954 /*
1955 * info callback for selector unit
1956 * use an enumerator type for routing
1957 */
1958 static int mixer_ctl_selector_info(struct snd_kcontrol *kcontrol,
1959 struct snd_ctl_elem_info *uinfo)
1960 {
1961 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1962 const char **itemlist = (const char **)kcontrol->private_value;
1963
1964 if (snd_BUG_ON(!itemlist))
1965 return -EINVAL;
1966 return snd_ctl_enum_info(uinfo, 1, cval->max, itemlist);
1967 }
1968
1969 /* get callback for selector unit */
1970 static int mixer_ctl_selector_get(struct snd_kcontrol *kcontrol,
1971 struct snd_ctl_elem_value *ucontrol)
1972 {
1973 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1974 int val, err;
1975
1976 err = get_cur_ctl_value(cval, cval->control << 8, &val);
1977 if (err < 0) {
1978 ucontrol->value.enumerated.item[0] = 0;
1979 return filter_error(cval, err);
1980 }
1981 val = get_relative_value(cval, val);
1982 ucontrol->value.enumerated.item[0] = val;
1983 return 0;
1984 }
1985
1986 /* put callback for selector unit */
1987 static int mixer_ctl_selector_put(struct snd_kcontrol *kcontrol,
1988 struct snd_ctl_elem_value *ucontrol)
1989 {
1990 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1991 int val, oval, err;
1992
1993 err = get_cur_ctl_value(cval, cval->control << 8, &oval);
1994 if (err < 0)
1995 return filter_error(cval, err);
1996 val = ucontrol->value.enumerated.item[0];
1997 val = get_abs_value(cval, val);
1998 if (val != oval) {
1999 set_cur_ctl_value(cval, cval->control << 8, val);
2000 return 1;
2001 }
2002 return 0;
2003 }
2004
2005 /* alsa control interface for selector unit */
2006 static struct snd_kcontrol_new mixer_selectunit_ctl = {
2007 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
2008 .name = "", /* will be filled later */
2009 .info = mixer_ctl_selector_info,
2010 .get = mixer_ctl_selector_get,
2011 .put = mixer_ctl_selector_put,
2012 };
2013
2014 /*
2015 * private free callback.
2016 * free both private_data and private_value
2017 */
2018 static void usb_mixer_selector_elem_free(struct snd_kcontrol *kctl)
2019 {
2020 int i, num_ins = 0;
2021
2022 if (kctl->private_data) {
2023 struct usb_mixer_elem_info *cval = kctl->private_data;
2024 num_ins = cval->max;
2025 kfree(cval);
2026 kctl->private_data = NULL;
2027 }
2028 if (kctl->private_value) {
2029 char **itemlist = (char **)kctl->private_value;
2030 for (i = 0; i < num_ins; i++)
2031 kfree(itemlist[i]);
2032 kfree(itemlist);
2033 kctl->private_value = 0;
2034 }
2035 }
2036
2037 /*
2038 * parse a selector unit
2039 */
2040 static int parse_audio_selector_unit(struct mixer_build *state, int unitid,
2041 void *raw_desc)
2042 {
2043 struct uac_selector_unit_descriptor *desc = raw_desc;
2044 unsigned int i, nameid, len;
2045 int err;
2046 struct usb_mixer_elem_info *cval;
2047 struct snd_kcontrol *kctl;
2048 const struct usbmix_name_map *map;
2049 char **namelist;
2050
2051 if (desc->bLength < 5 || !desc->bNrInPins ||
2052 desc->bLength < 5 + desc->bNrInPins) {
2053 usb_audio_err(state->chip,
2054 "invalid SELECTOR UNIT descriptor %d\n", unitid);
2055 return -EINVAL;
2056 }
2057
2058 for (i = 0; i < desc->bNrInPins; i++) {
2059 if ((err = parse_audio_unit(state, desc->baSourceID[i])) < 0)
2060 return err;
2061 }
2062
2063 if (desc->bNrInPins == 1) /* only one ? nonsense! */
2064 return 0;
2065
2066 map = find_map(state, unitid, 0);
2067 if (check_ignored_ctl(map))
2068 return 0;
2069
2070 cval = kzalloc(sizeof(*cval), GFP_KERNEL);
2071 if (!cval)
2072 return -ENOMEM;
2073 snd_usb_mixer_elem_init_std(&cval->head, state->mixer, unitid);
2074 cval->val_type = USB_MIXER_U8;
2075 cval->channels = 1;
2076 cval->min = 1;
2077 cval->max = desc->bNrInPins;
2078 cval->res = 1;
2079 cval->initialized = 1;
2080
2081 if (state->mixer->protocol == UAC_VERSION_1)
2082 cval->control = 0;
2083 else /* UAC_VERSION_2 */
2084 cval->control = (desc->bDescriptorSubtype == UAC2_CLOCK_SELECTOR) ?
2085 UAC2_CX_CLOCK_SELECTOR : UAC2_SU_SELECTOR;
2086
2087 namelist = kmalloc(sizeof(char *) * desc->bNrInPins, GFP_KERNEL);
2088 if (!namelist) {
2089 kfree(cval);
2090 return -ENOMEM;
2091 }
2092 #define MAX_ITEM_NAME_LEN 64
2093 for (i = 0; i < desc->bNrInPins; i++) {
2094 struct usb_audio_term iterm;
2095 len = 0;
2096 namelist[i] = kmalloc(MAX_ITEM_NAME_LEN, GFP_KERNEL);
2097 if (!namelist[i]) {
2098 while (i--)
2099 kfree(namelist[i]);
2100 kfree(namelist);
2101 kfree(cval);
2102 return -ENOMEM;
2103 }
2104 len = check_mapped_selector_name(state, unitid, i, namelist[i],
2105 MAX_ITEM_NAME_LEN);
2106 if (! len && check_input_term(state, desc->baSourceID[i], &iterm) >= 0)
2107 len = get_term_name(state, &iterm, namelist[i], MAX_ITEM_NAME_LEN, 0);
2108 if (! len)
2109 sprintf(namelist[i], "Input %u", i);
2110 }
2111
2112 kctl = snd_ctl_new1(&mixer_selectunit_ctl, cval);
2113 if (! kctl) {
2114 usb_audio_err(state->chip, "cannot malloc kcontrol\n");
2115 kfree(namelist);
2116 kfree(cval);
2117 return -ENOMEM;
2118 }
2119 kctl->private_value = (unsigned long)namelist;
2120 kctl->private_free = usb_mixer_selector_elem_free;
2121
2122 /* check the static mapping table at first */
2123 len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name));
2124 if (!len) {
2125 /* no mapping ? */
2126 /* if iSelector is given, use it */
2127 nameid = uac_selector_unit_iSelector(desc);
2128 if (nameid)
2129 len = snd_usb_copy_string_desc(state, nameid,
2130 kctl->id.name,
2131 sizeof(kctl->id.name));
2132 /* ... or pick up the terminal name at next */
2133 if (!len)
2134 len = get_term_name(state, &state->oterm,
2135 kctl->id.name, sizeof(kctl->id.name), 0);
2136 /* ... or use the fixed string "USB" as the last resort */
2137 if (!len)
2138 strlcpy(kctl->id.name, "USB", sizeof(kctl->id.name));
2139
2140 /* and add the proper suffix */
2141 if (desc->bDescriptorSubtype == UAC2_CLOCK_SELECTOR)
2142 append_ctl_name(kctl, " Clock Source");
2143 else if ((state->oterm.type & 0xff00) == 0x0100)
2144 append_ctl_name(kctl, " Capture Source");
2145 else
2146 append_ctl_name(kctl, " Playback Source");
2147 }
2148
2149 usb_audio_dbg(state->chip, "[%d] SU [%s] items = %d\n",
2150 cval->head.id, kctl->id.name, desc->bNrInPins);
2151 return snd_usb_mixer_add_control(&cval->head, kctl);
2152 }
2153
2154 /*
2155 * parse an audio unit recursively
2156 */
2157
2158 static int parse_audio_unit(struct mixer_build *state, int unitid)
2159 {
2160 unsigned char *p1;
2161
2162 if (test_and_set_bit(unitid, state->unitbitmap))
2163 return 0; /* the unit already visited */
2164
2165 p1 = find_audio_control_unit(state, unitid);
2166 if (!p1) {
2167 usb_audio_err(state->chip, "unit %d not found!\n", unitid);
2168 return -EINVAL;
2169 }
2170
2171 switch (p1[2]) {
2172 case UAC_INPUT_TERMINAL:
2173 case UAC2_CLOCK_SOURCE:
2174 return 0; /* NOP */
2175 case UAC_MIXER_UNIT:
2176 return parse_audio_mixer_unit(state, unitid, p1);
2177 case UAC_SELECTOR_UNIT:
2178 case UAC2_CLOCK_SELECTOR:
2179 return parse_audio_selector_unit(state, unitid, p1);
2180 case UAC_FEATURE_UNIT:
2181 return parse_audio_feature_unit(state, unitid, p1);
2182 case UAC1_PROCESSING_UNIT:
2183 /* UAC2_EFFECT_UNIT has the same value */
2184 if (state->mixer->protocol == UAC_VERSION_1)
2185 return parse_audio_processing_unit(state, unitid, p1);
2186 else
2187 return 0; /* FIXME - effect units not implemented yet */
2188 case UAC1_EXTENSION_UNIT:
2189 /* UAC2_PROCESSING_UNIT_V2 has the same value */
2190 if (state->mixer->protocol == UAC_VERSION_1)
2191 return parse_audio_extension_unit(state, unitid, p1);
2192 else /* UAC_VERSION_2 */
2193 return parse_audio_processing_unit(state, unitid, p1);
2194 case UAC2_EXTENSION_UNIT_V2:
2195 return parse_audio_extension_unit(state, unitid, p1);
2196 default:
2197 usb_audio_err(state->chip,
2198 "unit %u: unexpected type 0x%02x\n", unitid, p1[2]);
2199 return -EINVAL;
2200 }
2201 }
2202
2203 static void snd_usb_mixer_free(struct usb_mixer_interface *mixer)
2204 {
2205 /* kill pending URBs */
2206 snd_usb_mixer_disconnect(mixer);
2207
2208 kfree(mixer->id_elems);
2209 if (mixer->urb) {
2210 kfree(mixer->urb->transfer_buffer);
2211 usb_free_urb(mixer->urb);
2212 }
2213 usb_free_urb(mixer->rc_urb);
2214 kfree(mixer->rc_setup_packet);
2215 kfree(mixer);
2216 }
2217
2218 static int snd_usb_mixer_dev_free(struct snd_device *device)
2219 {
2220 struct usb_mixer_interface *mixer = device->device_data;
2221 snd_usb_mixer_free(mixer);
2222 return 0;
2223 }
2224
2225 /*
2226 * create mixer controls
2227 *
2228 * walk through all UAC_OUTPUT_TERMINAL descriptors to search for mixers
2229 */
2230 static int snd_usb_mixer_controls(struct usb_mixer_interface *mixer)
2231 {
2232 struct mixer_build state;
2233 int err;
2234 const struct usbmix_ctl_map *map;
2235 void *p;
2236
2237 memset(&state, 0, sizeof(state));
2238 state.chip = mixer->chip;
2239 state.mixer = mixer;
2240 state.buffer = mixer->hostif->extra;
2241 state.buflen = mixer->hostif->extralen;
2242
2243 /* check the mapping table */
2244 for (map = usbmix_ctl_maps; map->id; map++) {
2245 if (map->id == state.chip->usb_id) {
2246 state.map = map->map;
2247 state.selector_map = map->selector_map;
2248 mixer->ignore_ctl_error = map->ignore_ctl_error;
2249 break;
2250 }
2251 }
2252
2253 p = NULL;
2254 while ((p = snd_usb_find_csint_desc(mixer->hostif->extra,
2255 mixer->hostif->extralen,
2256 p, UAC_OUTPUT_TERMINAL)) != NULL) {
2257 if (mixer->protocol == UAC_VERSION_1) {
2258 struct uac1_output_terminal_descriptor *desc = p;
2259
2260 if (desc->bLength < sizeof(*desc))
2261 continue; /* invalid descriptor? */
2262 /* mark terminal ID as visited */
2263 set_bit(desc->bTerminalID, state.unitbitmap);
2264 state.oterm.id = desc->bTerminalID;
2265 state.oterm.type = le16_to_cpu(desc->wTerminalType);
2266 state.oterm.name = desc->iTerminal;
2267 err = parse_audio_unit(&state, desc->bSourceID);
2268 if (err < 0 && err != -EINVAL)
2269 return err;
2270 } else { /* UAC_VERSION_2 */
2271 struct uac2_output_terminal_descriptor *desc = p;
2272
2273 if (desc->bLength < sizeof(*desc))
2274 continue; /* invalid descriptor? */
2275 /* mark terminal ID as visited */
2276 set_bit(desc->bTerminalID, state.unitbitmap);
2277 state.oterm.id = desc->bTerminalID;
2278 state.oterm.type = le16_to_cpu(desc->wTerminalType);
2279 state.oterm.name = desc->iTerminal;
2280 err = parse_audio_unit(&state, desc->bSourceID);
2281 if (err < 0 && err != -EINVAL)
2282 return err;
2283
2284 /*
2285 * For UAC2, use the same approach to also add the
2286 * clock selectors
2287 */
2288 err = parse_audio_unit(&state, desc->bCSourceID);
2289 if (err < 0 && err != -EINVAL)
2290 return err;
2291 }
2292 }
2293
2294 return 0;
2295 }
2296
2297 void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer, int unitid)
2298 {
2299 struct usb_mixer_elem_list *list;
2300
2301 for (list = mixer->id_elems[unitid]; list; list = list->next_id_elem)
2302 snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
2303 &list->kctl->id);
2304 }
2305
2306 static void snd_usb_mixer_dump_cval(struct snd_info_buffer *buffer,
2307 struct usb_mixer_elem_list *list)
2308 {
2309 struct usb_mixer_elem_info *cval = (struct usb_mixer_elem_info *)list;
2310 static char *val_types[] = {"BOOLEAN", "INV_BOOLEAN",
2311 "S8", "U8", "S16", "U16"};
2312 snd_iprintf(buffer, " Info: id=%i, control=%i, cmask=0x%x, "
2313 "channels=%i, type=\"%s\"\n", cval->head.id,
2314 cval->control, cval->cmask, cval->channels,
2315 val_types[cval->val_type]);
2316 snd_iprintf(buffer, " Volume: min=%i, max=%i, dBmin=%i, dBmax=%i\n",
2317 cval->min, cval->max, cval->dBmin, cval->dBmax);
2318 }
2319
2320 static void snd_usb_mixer_proc_read(struct snd_info_entry *entry,
2321 struct snd_info_buffer *buffer)
2322 {
2323 struct snd_usb_audio *chip = entry->private_data;
2324 struct usb_mixer_interface *mixer;
2325 struct usb_mixer_elem_list *list;
2326 int unitid;
2327
2328 list_for_each_entry(mixer, &chip->mixer_list, list) {
2329 snd_iprintf(buffer,
2330 "USB Mixer: usb_id=0x%08x, ctrlif=%i, ctlerr=%i\n",
2331 chip->usb_id, snd_usb_ctrl_intf(chip),
2332 mixer->ignore_ctl_error);
2333 snd_iprintf(buffer, "Card: %s\n", chip->card->longname);
2334 for (unitid = 0; unitid < MAX_ID_ELEMS; unitid++) {
2335 for (list = mixer->id_elems[unitid]; list;
2336 list = list->next_id_elem) {
2337 snd_iprintf(buffer, " Unit: %i\n", list->id);
2338 if (list->kctl)
2339 snd_iprintf(buffer,
2340 " Control: name=\"%s\", index=%i\n",
2341 list->kctl->id.name,
2342 list->kctl->id.index);
2343 if (list->dump)
2344 list->dump(buffer, list);
2345 }
2346 }
2347 }
2348 }
2349
2350 static void snd_usb_mixer_interrupt_v2(struct usb_mixer_interface *mixer,
2351 int attribute, int value, int index)
2352 {
2353 struct usb_mixer_elem_list *list;
2354 __u8 unitid = (index >> 8) & 0xff;
2355 __u8 control = (value >> 8) & 0xff;
2356 __u8 channel = value & 0xff;
2357
2358 if (channel >= MAX_CHANNELS) {
2359 usb_audio_dbg(mixer->chip,
2360 "%s(): bogus channel number %d\n",
2361 __func__, channel);
2362 return;
2363 }
2364
2365 for (list = mixer->id_elems[unitid]; list; list = list->next_id_elem) {
2366 struct usb_mixer_elem_info *info;
2367
2368 if (!list->kctl)
2369 continue;
2370
2371 info = (struct usb_mixer_elem_info *)list;
2372 if (info->control != control)
2373 continue;
2374
2375 switch (attribute) {
2376 case UAC2_CS_CUR:
2377 /* invalidate cache, so the value is read from the device */
2378 if (channel)
2379 info->cached &= ~(1 << channel);
2380 else /* master channel */
2381 info->cached = 0;
2382
2383 snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
2384 &info->head.kctl->id);
2385 break;
2386
2387 case UAC2_CS_RANGE:
2388 /* TODO */
2389 break;
2390
2391 case UAC2_CS_MEM:
2392 /* TODO */
2393 break;
2394
2395 default:
2396 usb_audio_dbg(mixer->chip,
2397 "unknown attribute %d in interrupt\n",
2398 attribute);
2399 break;
2400 } /* switch */
2401 }
2402 }
2403
2404 static void snd_usb_mixer_interrupt(struct urb *urb)
2405 {
2406 struct usb_mixer_interface *mixer = urb->context;
2407 int len = urb->actual_length;
2408 int ustatus = urb->status;
2409
2410 if (ustatus != 0)
2411 goto requeue;
2412
2413 if (mixer->protocol == UAC_VERSION_1) {
2414 struct uac1_status_word *status;
2415
2416 for (status = urb->transfer_buffer;
2417 len >= sizeof(*status);
2418 len -= sizeof(*status), status++) {
2419 dev_dbg(&urb->dev->dev, "status interrupt: %02x %02x\n",
2420 status->bStatusType,
2421 status->bOriginator);
2422
2423 /* ignore any notifications not from the control interface */
2424 if ((status->bStatusType & UAC1_STATUS_TYPE_ORIG_MASK) !=
2425 UAC1_STATUS_TYPE_ORIG_AUDIO_CONTROL_IF)
2426 continue;
2427
2428 if (status->bStatusType & UAC1_STATUS_TYPE_MEM_CHANGED)
2429 snd_usb_mixer_rc_memory_change(mixer, status->bOriginator);
2430 else
2431 snd_usb_mixer_notify_id(mixer, status->bOriginator);
2432 }
2433 } else { /* UAC_VERSION_2 */
2434 struct uac2_interrupt_data_msg *msg;
2435
2436 for (msg = urb->transfer_buffer;
2437 len >= sizeof(*msg);
2438 len -= sizeof(*msg), msg++) {
2439 /* drop vendor specific and endpoint requests */
2440 if ((msg->bInfo & UAC2_INTERRUPT_DATA_MSG_VENDOR) ||
2441 (msg->bInfo & UAC2_INTERRUPT_DATA_MSG_EP))
2442 continue;
2443
2444 snd_usb_mixer_interrupt_v2(mixer, msg->bAttribute,
2445 le16_to_cpu(msg->wValue),
2446 le16_to_cpu(msg->wIndex));
2447 }
2448 }
2449
2450 requeue:
2451 if (ustatus != -ENOENT &&
2452 ustatus != -ECONNRESET &&
2453 ustatus != -ESHUTDOWN) {
2454 urb->dev = mixer->chip->dev;
2455 usb_submit_urb(urb, GFP_ATOMIC);
2456 }
2457 }
2458
2459 /* create the handler for the optional status interrupt endpoint */
2460 static int snd_usb_mixer_status_create(struct usb_mixer_interface *mixer)
2461 {
2462 struct usb_endpoint_descriptor *ep;
2463 void *transfer_buffer;
2464 int buffer_length;
2465 unsigned int epnum;
2466
2467 /* we need one interrupt input endpoint */
2468 if (get_iface_desc(mixer->hostif)->bNumEndpoints < 1)
2469 return 0;
2470 ep = get_endpoint(mixer->hostif, 0);
2471 if (!usb_endpoint_dir_in(ep) || !usb_endpoint_xfer_int(ep))
2472 return 0;
2473
2474 epnum = usb_endpoint_num(ep);
2475 buffer_length = le16_to_cpu(ep->wMaxPacketSize);
2476 transfer_buffer = kmalloc(buffer_length, GFP_KERNEL);
2477 if (!transfer_buffer)
2478 return -ENOMEM;
2479 mixer->urb = usb_alloc_urb(0, GFP_KERNEL);
2480 if (!mixer->urb) {
2481 kfree(transfer_buffer);
2482 return -ENOMEM;
2483 }
2484 usb_fill_int_urb(mixer->urb, mixer->chip->dev,
2485 usb_rcvintpipe(mixer->chip->dev, epnum),
2486 transfer_buffer, buffer_length,
2487 snd_usb_mixer_interrupt, mixer, ep->bInterval);
2488 usb_submit_urb(mixer->urb, GFP_KERNEL);
2489 return 0;
2490 }
2491
2492 int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif,
2493 int ignore_error)
2494 {
2495 static struct snd_device_ops dev_ops = {
2496 .dev_free = snd_usb_mixer_dev_free
2497 };
2498 struct usb_mixer_interface *mixer;
2499 struct snd_info_entry *entry;
2500 int err;
2501
2502 strcpy(chip->card->mixername, "USB Mixer");
2503
2504 mixer = kzalloc(sizeof(*mixer), GFP_KERNEL);
2505 if (!mixer)
2506 return -ENOMEM;
2507 mixer->chip = chip;
2508 mixer->ignore_ctl_error = ignore_error;
2509 mixer->id_elems = kcalloc(MAX_ID_ELEMS, sizeof(*mixer->id_elems),
2510 GFP_KERNEL);
2511 if (!mixer->id_elems) {
2512 kfree(mixer);
2513 return -ENOMEM;
2514 }
2515
2516 mixer->hostif = &usb_ifnum_to_if(chip->dev, ctrlif)->altsetting[0];
2517 switch (get_iface_desc(mixer->hostif)->bInterfaceProtocol) {
2518 case UAC_VERSION_1:
2519 default:
2520 mixer->protocol = UAC_VERSION_1;
2521 break;
2522 case UAC_VERSION_2:
2523 mixer->protocol = UAC_VERSION_2;
2524 break;
2525 }
2526
2527 if ((err = snd_usb_mixer_controls(mixer)) < 0 ||
2528 (err = snd_usb_mixer_status_create(mixer)) < 0)
2529 goto _error;
2530
2531 snd_usb_mixer_apply_create_quirk(mixer);
2532
2533 err = snd_device_new(chip->card, SNDRV_DEV_CODEC, mixer, &dev_ops);
2534 if (err < 0)
2535 goto _error;
2536
2537 if (list_empty(&chip->mixer_list) &&
2538 !snd_card_proc_new(chip->card, "usbmixer", &entry))
2539 snd_info_set_text_ops(entry, chip, snd_usb_mixer_proc_read);
2540
2541 list_add(&mixer->list, &chip->mixer_list);
2542 return 0;
2543
2544 _error:
2545 snd_usb_mixer_free(mixer);
2546 return err;
2547 }
2548
2549 void snd_usb_mixer_disconnect(struct usb_mixer_interface *mixer)
2550 {
2551 if (mixer->disconnected)
2552 return;
2553 if (mixer->urb)
2554 usb_kill_urb(mixer->urb);
2555 if (mixer->rc_urb)
2556 usb_kill_urb(mixer->rc_urb);
2557 mixer->disconnected = true;
2558 }
2559
2560 #ifdef CONFIG_PM
2561 /* stop any bus activity of a mixer */
2562 static void snd_usb_mixer_inactivate(struct usb_mixer_interface *mixer)
2563 {
2564 usb_kill_urb(mixer->urb);
2565 usb_kill_urb(mixer->rc_urb);
2566 }
2567
2568 static int snd_usb_mixer_activate(struct usb_mixer_interface *mixer)
2569 {
2570 int err;
2571
2572 if (mixer->urb) {
2573 err = usb_submit_urb(mixer->urb, GFP_NOIO);
2574 if (err < 0)
2575 return err;
2576 }
2577
2578 return 0;
2579 }
2580
2581 int snd_usb_mixer_suspend(struct usb_mixer_interface *mixer)
2582 {
2583 snd_usb_mixer_inactivate(mixer);
2584 return 0;
2585 }
2586
2587 static int restore_mixer_value(struct usb_mixer_elem_list *list)
2588 {
2589 struct usb_mixer_elem_info *cval = (struct usb_mixer_elem_info *)list;
2590 int c, err, idx;
2591
2592 if (cval->cmask) {
2593 idx = 0;
2594 for (c = 0; c < MAX_CHANNELS; c++) {
2595 if (!(cval->cmask & (1 << c)))
2596 continue;
2597 if (cval->cached & (1 << (c + 1))) {
2598 err = snd_usb_set_cur_mix_value(cval, c + 1, idx,
2599 cval->cache_val[idx]);
2600 if (err < 0)
2601 return err;
2602 }
2603 idx++;
2604 }
2605 } else {
2606 /* master */
2607 if (cval->cached) {
2608 err = snd_usb_set_cur_mix_value(cval, 0, 0, *cval->cache_val);
2609 if (err < 0)
2610 return err;
2611 }
2612 }
2613
2614 return 0;
2615 }
2616
2617 int snd_usb_mixer_resume(struct usb_mixer_interface *mixer, bool reset_resume)
2618 {
2619 struct usb_mixer_elem_list *list;
2620 int id, err;
2621
2622 if (reset_resume) {
2623 /* restore cached mixer values */
2624 for (id = 0; id < MAX_ID_ELEMS; id++) {
2625 for (list = mixer->id_elems[id]; list;
2626 list = list->next_id_elem) {
2627 if (list->resume) {
2628 err = list->resume(list);
2629 if (err < 0)
2630 return err;
2631 }
2632 }
2633 }
2634 }
2635
2636 return snd_usb_mixer_activate(mixer);
2637 }
2638 #endif
2639
2640 void snd_usb_mixer_elem_init_std(struct usb_mixer_elem_list *list,
2641 struct usb_mixer_interface *mixer,
2642 int unitid)
2643 {
2644 list->mixer = mixer;
2645 list->id = unitid;
2646 list->dump = snd_usb_mixer_dump_cval;
2647 #ifdef CONFIG_PM
2648 list->resume = restore_mixer_value;
2649 #endif
2650 }
Linux with added FPC-III support