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Merge tag 'mac80211-for-davem-2015-09-22' of git://git.kernel.org/pub/scm/linux/kerne...
[deliverable/linux.git] / sound / usb / mixer.c
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 buf[len] = 0;
207 return len;
208 }
209
210 /*
211 * convert from the byte/word on usb descriptor to the zero-based integer
212 */
213 static int convert_signed_value(struct usb_mixer_elem_info *cval, int val)
214 {
215 switch (cval->val_type) {
216 case USB_MIXER_BOOLEAN:
217 return !!val;
218 case USB_MIXER_INV_BOOLEAN:
219 return !val;
220 case USB_MIXER_U8:
221 val &= 0xff;
222 break;
223 case USB_MIXER_S8:
224 val &= 0xff;
225 if (val >= 0x80)
226 val -= 0x100;
227 break;
228 case USB_MIXER_U16:
229 val &= 0xffff;
230 break;
231 case USB_MIXER_S16:
232 val &= 0xffff;
233 if (val >= 0x8000)
234 val -= 0x10000;
235 break;
236 }
237 return val;
238 }
239
240 /*
241 * convert from the zero-based int to the byte/word for usb descriptor
242 */
243 static int convert_bytes_value(struct usb_mixer_elem_info *cval, int val)
244 {
245 switch (cval->val_type) {
246 case USB_MIXER_BOOLEAN:
247 return !!val;
248 case USB_MIXER_INV_BOOLEAN:
249 return !val;
250 case USB_MIXER_S8:
251 case USB_MIXER_U8:
252 return val & 0xff;
253 case USB_MIXER_S16:
254 case USB_MIXER_U16:
255 return val & 0xffff;
256 }
257 return 0; /* not reached */
258 }
259
260 static int get_relative_value(struct usb_mixer_elem_info *cval, int val)
261 {
262 if (!cval->res)
263 cval->res = 1;
264 if (val < cval->min)
265 return 0;
266 else if (val >= cval->max)
267 return (cval->max - cval->min + cval->res - 1) / cval->res;
268 else
269 return (val - cval->min) / cval->res;
270 }
271
272 static int get_abs_value(struct usb_mixer_elem_info *cval, int val)
273 {
274 if (val < 0)
275 return cval->min;
276 if (!cval->res)
277 cval->res = 1;
278 val *= cval->res;
279 val += cval->min;
280 if (val > cval->max)
281 return cval->max;
282 return val;
283 }
284
285 static int uac2_ctl_value_size(int val_type)
286 {
287 switch (val_type) {
288 case USB_MIXER_S32:
289 case USB_MIXER_U32:
290 return 4;
291 case USB_MIXER_S16:
292 case USB_MIXER_U16:
293 return 2;
294 default:
295 return 1;
296 }
297 return 0; /* unreachable */
298 }
299
300
301 /*
302 * retrieve a mixer value
303 */
304
305 static int get_ctl_value_v1(struct usb_mixer_elem_info *cval, int request,
306 int validx, int *value_ret)
307 {
308 struct snd_usb_audio *chip = cval->head.mixer->chip;
309 unsigned char buf[2];
310 int val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1;
311 int timeout = 10;
312 int idx = 0, err;
313
314 err = snd_usb_lock_shutdown(chip);
315 if (err < 0)
316 return -EIO;
317
318 while (timeout-- > 0) {
319 idx = snd_usb_ctrl_intf(chip) | (cval->head.id << 8);
320 if (snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), request,
321 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
322 validx, idx, buf, val_len) >= val_len) {
323 *value_ret = convert_signed_value(cval, snd_usb_combine_bytes(buf, val_len));
324 err = 0;
325 goto out;
326 }
327 }
328 usb_audio_dbg(chip,
329 "cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n",
330 request, validx, idx, cval->val_type);
331 err = -EINVAL;
332
333 out:
334 snd_usb_unlock_shutdown(chip);
335 return err;
336 }
337
338 static int get_ctl_value_v2(struct usb_mixer_elem_info *cval, int request,
339 int validx, int *value_ret)
340 {
341 struct snd_usb_audio *chip = cval->head.mixer->chip;
342 unsigned char buf[4 + 3 * sizeof(__u32)]; /* enough space for one range */
343 unsigned char *val;
344 int idx = 0, ret, size;
345 __u8 bRequest;
346
347 if (request == UAC_GET_CUR) {
348 bRequest = UAC2_CS_CUR;
349 size = uac2_ctl_value_size(cval->val_type);
350 } else {
351 bRequest = UAC2_CS_RANGE;
352 size = sizeof(buf);
353 }
354
355 memset(buf, 0, sizeof(buf));
356
357 ret = snd_usb_lock_shutdown(chip) ? -EIO : 0;
358 if (ret)
359 goto error;
360
361 idx = snd_usb_ctrl_intf(chip) | (cval->head.id << 8);
362 ret = snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), bRequest,
363 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
364 validx, idx, buf, size);
365 snd_usb_unlock_shutdown(chip);
366
367 if (ret < 0) {
368 error:
369 usb_audio_err(chip,
370 "cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n",
371 request, validx, idx, cval->val_type);
372 return ret;
373 }
374
375 /* FIXME: how should we handle multiple triplets here? */
376
377 switch (request) {
378 case UAC_GET_CUR:
379 val = buf;
380 break;
381 case UAC_GET_MIN:
382 val = buf + sizeof(__u16);
383 break;
384 case UAC_GET_MAX:
385 val = buf + sizeof(__u16) * 2;
386 break;
387 case UAC_GET_RES:
388 val = buf + sizeof(__u16) * 3;
389 break;
390 default:
391 return -EINVAL;
392 }
393
394 *value_ret = convert_signed_value(cval, snd_usb_combine_bytes(val, sizeof(__u16)));
395
396 return 0;
397 }
398
399 static int get_ctl_value(struct usb_mixer_elem_info *cval, int request,
400 int validx, int *value_ret)
401 {
402 validx += cval->idx_off;
403
404 return (cval->head.mixer->protocol == UAC_VERSION_1) ?
405 get_ctl_value_v1(cval, request, validx, value_ret) :
406 get_ctl_value_v2(cval, request, validx, value_ret);
407 }
408
409 static int get_cur_ctl_value(struct usb_mixer_elem_info *cval,
410 int validx, int *value)
411 {
412 return get_ctl_value(cval, UAC_GET_CUR, validx, value);
413 }
414
415 /* channel = 0: master, 1 = first channel */
416 static inline int get_cur_mix_raw(struct usb_mixer_elem_info *cval,
417 int channel, int *value)
418 {
419 return get_ctl_value(cval, UAC_GET_CUR,
420 (cval->control << 8) | channel,
421 value);
422 }
423
424 int snd_usb_get_cur_mix_value(struct usb_mixer_elem_info *cval,
425 int channel, int index, int *value)
426 {
427 int err;
428
429 if (cval->cached & (1 << channel)) {
430 *value = cval->cache_val[index];
431 return 0;
432 }
433 err = get_cur_mix_raw(cval, channel, value);
434 if (err < 0) {
435 if (!cval->head.mixer->ignore_ctl_error)
436 usb_audio_dbg(cval->head.mixer->chip,
437 "cannot get current value for control %d ch %d: err = %d\n",
438 cval->control, channel, err);
439 return err;
440 }
441 cval->cached |= 1 << channel;
442 cval->cache_val[index] = *value;
443 return 0;
444 }
445
446 /*
447 * set a mixer value
448 */
449
450 int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval,
451 int request, int validx, int value_set)
452 {
453 struct snd_usb_audio *chip = cval->head.mixer->chip;
454 unsigned char buf[4];
455 int idx = 0, val_len, err, timeout = 10;
456
457 validx += cval->idx_off;
458
459 if (cval->head.mixer->protocol == UAC_VERSION_1) {
460 val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1;
461 } else { /* UAC_VERSION_2 */
462 val_len = uac2_ctl_value_size(cval->val_type);
463
464 /* FIXME */
465 if (request != UAC_SET_CUR) {
466 usb_audio_dbg(chip, "RANGE setting not yet supported\n");
467 return -EINVAL;
468 }
469
470 request = UAC2_CS_CUR;
471 }
472
473 value_set = convert_bytes_value(cval, value_set);
474 buf[0] = value_set & 0xff;
475 buf[1] = (value_set >> 8) & 0xff;
476 buf[2] = (value_set >> 16) & 0xff;
477 buf[3] = (value_set >> 24) & 0xff;
478
479 err = snd_usb_lock_shutdown(chip);
480 if (err < 0)
481 return -EIO;
482
483 while (timeout-- > 0) {
484 idx = snd_usb_ctrl_intf(chip) | (cval->head.id << 8);
485 if (snd_usb_ctl_msg(chip->dev,
486 usb_sndctrlpipe(chip->dev, 0), request,
487 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
488 validx, idx, buf, val_len) >= 0) {
489 err = 0;
490 goto out;
491 }
492 }
493 usb_audio_dbg(chip, "cannot set ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d, data = %#x/%#x\n",
494 request, validx, idx, cval->val_type, buf[0], buf[1]);
495 err = -EINVAL;
496
497 out:
498 snd_usb_unlock_shutdown(chip);
499 return err;
500 }
501
502 static int set_cur_ctl_value(struct usb_mixer_elem_info *cval,
503 int validx, int value)
504 {
505 return snd_usb_mixer_set_ctl_value(cval, UAC_SET_CUR, validx, value);
506 }
507
508 int snd_usb_set_cur_mix_value(struct usb_mixer_elem_info *cval, int channel,
509 int index, int value)
510 {
511 int err;
512 unsigned int read_only = (channel == 0) ?
513 cval->master_readonly :
514 cval->ch_readonly & (1 << (channel - 1));
515
516 if (read_only) {
517 usb_audio_dbg(cval->head.mixer->chip,
518 "%s(): channel %d of control %d is read_only\n",
519 __func__, channel, cval->control);
520 return 0;
521 }
522
523 err = snd_usb_mixer_set_ctl_value(cval,
524 UAC_SET_CUR, (cval->control << 8) | channel,
525 value);
526 if (err < 0)
527 return err;
528 cval->cached |= 1 << channel;
529 cval->cache_val[index] = value;
530 return 0;
531 }
532
533 /*
534 * TLV callback for mixer volume controls
535 */
536 int snd_usb_mixer_vol_tlv(struct snd_kcontrol *kcontrol, int op_flag,
537 unsigned int size, unsigned int __user *_tlv)
538 {
539 struct usb_mixer_elem_info *cval = kcontrol->private_data;
540 DECLARE_TLV_DB_MINMAX(scale, 0, 0);
541
542 if (size < sizeof(scale))
543 return -ENOMEM;
544 scale[2] = cval->dBmin;
545 scale[3] = cval->dBmax;
546 if (copy_to_user(_tlv, scale, sizeof(scale)))
547 return -EFAULT;
548 return 0;
549 }
550
551 /*
552 * parser routines begin here...
553 */
554
555 static int parse_audio_unit(struct mixer_build *state, int unitid);
556
557
558 /*
559 * check if the input/output channel routing is enabled on the given bitmap.
560 * used for mixer unit parser
561 */
562 static int check_matrix_bitmap(unsigned char *bmap,
563 int ich, int och, int num_outs)
564 {
565 int idx = ich * num_outs + och;
566 return bmap[idx >> 3] & (0x80 >> (idx & 7));
567 }
568
569 /*
570 * add an alsa control element
571 * search and increment the index until an empty slot is found.
572 *
573 * if failed, give up and free the control instance.
574 */
575
576 int snd_usb_mixer_add_control(struct usb_mixer_elem_list *list,
577 struct snd_kcontrol *kctl)
578 {
579 struct usb_mixer_interface *mixer = list->mixer;
580 int err;
581
582 while (snd_ctl_find_id(mixer->chip->card, &kctl->id))
583 kctl->id.index++;
584 if ((err = snd_ctl_add(mixer->chip->card, kctl)) < 0) {
585 usb_audio_dbg(mixer->chip, "cannot add control (err = %d)\n",
586 err);
587 return err;
588 }
589 list->kctl = kctl;
590 list->next_id_elem = mixer->id_elems[list->id];
591 mixer->id_elems[list->id] = list;
592 return 0;
593 }
594
595 /*
596 * get a terminal name string
597 */
598
599 static struct iterm_name_combo {
600 int type;
601 char *name;
602 } iterm_names[] = {
603 { 0x0300, "Output" },
604 { 0x0301, "Speaker" },
605 { 0x0302, "Headphone" },
606 { 0x0303, "HMD Audio" },
607 { 0x0304, "Desktop Speaker" },
608 { 0x0305, "Room Speaker" },
609 { 0x0306, "Com Speaker" },
610 { 0x0307, "LFE" },
611 { 0x0600, "External In" },
612 { 0x0601, "Analog In" },
613 { 0x0602, "Digital In" },
614 { 0x0603, "Line" },
615 { 0x0604, "Legacy In" },
616 { 0x0605, "IEC958 In" },
617 { 0x0606, "1394 DA Stream" },
618 { 0x0607, "1394 DV Stream" },
619 { 0x0700, "Embedded" },
620 { 0x0701, "Noise Source" },
621 { 0x0702, "Equalization Noise" },
622 { 0x0703, "CD" },
623 { 0x0704, "DAT" },
624 { 0x0705, "DCC" },
625 { 0x0706, "MiniDisk" },
626 { 0x0707, "Analog Tape" },
627 { 0x0708, "Phonograph" },
628 { 0x0709, "VCR Audio" },
629 { 0x070a, "Video Disk Audio" },
630 { 0x070b, "DVD Audio" },
631 { 0x070c, "TV Tuner Audio" },
632 { 0x070d, "Satellite Rec Audio" },
633 { 0x070e, "Cable Tuner Audio" },
634 { 0x070f, "DSS Audio" },
635 { 0x0710, "Radio Receiver" },
636 { 0x0711, "Radio Transmitter" },
637 { 0x0712, "Multi-Track Recorder" },
638 { 0x0713, "Synthesizer" },
639 { 0 },
640 };
641
642 static int get_term_name(struct mixer_build *state, struct usb_audio_term *iterm,
643 unsigned char *name, int maxlen, int term_only)
644 {
645 struct iterm_name_combo *names;
646
647 if (iterm->name)
648 return snd_usb_copy_string_desc(state, iterm->name,
649 name, maxlen);
650
651 /* virtual type - not a real terminal */
652 if (iterm->type >> 16) {
653 if (term_only)
654 return 0;
655 switch (iterm->type >> 16) {
656 case UAC_SELECTOR_UNIT:
657 strcpy(name, "Selector");
658 return 8;
659 case UAC1_PROCESSING_UNIT:
660 strcpy(name, "Process Unit");
661 return 12;
662 case UAC1_EXTENSION_UNIT:
663 strcpy(name, "Ext Unit");
664 return 8;
665 case UAC_MIXER_UNIT:
666 strcpy(name, "Mixer");
667 return 5;
668 default:
669 return sprintf(name, "Unit %d", iterm->id);
670 }
671 }
672
673 switch (iterm->type & 0xff00) {
674 case 0x0100:
675 strcpy(name, "PCM");
676 return 3;
677 case 0x0200:
678 strcpy(name, "Mic");
679 return 3;
680 case 0x0400:
681 strcpy(name, "Headset");
682 return 7;
683 case 0x0500:
684 strcpy(name, "Phone");
685 return 5;
686 }
687
688 for (names = iterm_names; names->type; names++) {
689 if (names->type == iterm->type) {
690 strcpy(name, names->name);
691 return strlen(names->name);
692 }
693 }
694
695 return 0;
696 }
697
698 /*
699 * parse the source unit recursively until it reaches to a terminal
700 * or a branched unit.
701 */
702 static int check_input_term(struct mixer_build *state, int id,
703 struct usb_audio_term *term)
704 {
705 int err;
706 void *p1;
707
708 memset(term, 0, sizeof(*term));
709 while ((p1 = find_audio_control_unit(state, id)) != NULL) {
710 unsigned char *hdr = p1;
711 term->id = id;
712 switch (hdr[2]) {
713 case UAC_INPUT_TERMINAL:
714 if (state->mixer->protocol == UAC_VERSION_1) {
715 struct uac_input_terminal_descriptor *d = p1;
716 term->type = le16_to_cpu(d->wTerminalType);
717 term->channels = d->bNrChannels;
718 term->chconfig = le16_to_cpu(d->wChannelConfig);
719 term->name = d->iTerminal;
720 } else { /* UAC_VERSION_2 */
721 struct uac2_input_terminal_descriptor *d = p1;
722
723 /* call recursively to verify that the
724 * referenced clock entity is valid */
725 err = check_input_term(state, d->bCSourceID, term);
726 if (err < 0)
727 return err;
728
729 /* save input term properties after recursion,
730 * to ensure they are not overriden by the
731 * recursion calls */
732 term->id = id;
733 term->type = le16_to_cpu(d->wTerminalType);
734 term->channels = d->bNrChannels;
735 term->chconfig = le32_to_cpu(d->bmChannelConfig);
736 term->name = d->iTerminal;
737 }
738 return 0;
739 case UAC_FEATURE_UNIT: {
740 /* the header is the same for v1 and v2 */
741 struct uac_feature_unit_descriptor *d = p1;
742 id = d->bSourceID;
743 break; /* continue to parse */
744 }
745 case UAC_MIXER_UNIT: {
746 struct uac_mixer_unit_descriptor *d = p1;
747 term->type = d->bDescriptorSubtype << 16; /* virtual type */
748 term->channels = uac_mixer_unit_bNrChannels(d);
749 term->chconfig = uac_mixer_unit_wChannelConfig(d, state->mixer->protocol);
750 term->name = uac_mixer_unit_iMixer(d);
751 return 0;
752 }
753 case UAC_SELECTOR_UNIT:
754 case UAC2_CLOCK_SELECTOR: {
755 struct uac_selector_unit_descriptor *d = p1;
756 /* call recursively to retrieve the channel info */
757 err = check_input_term(state, d->baSourceID[0], term);
758 if (err < 0)
759 return err;
760 term->type = d->bDescriptorSubtype << 16; /* virtual type */
761 term->id = id;
762 term->name = uac_selector_unit_iSelector(d);
763 return 0;
764 }
765 case UAC1_PROCESSING_UNIT:
766 case UAC1_EXTENSION_UNIT:
767 /* UAC2_PROCESSING_UNIT_V2 */
768 /* UAC2_EFFECT_UNIT */
769 case UAC2_EXTENSION_UNIT_V2: {
770 struct uac_processing_unit_descriptor *d = p1;
771
772 if (state->mixer->protocol == UAC_VERSION_2 &&
773 hdr[2] == UAC2_EFFECT_UNIT) {
774 /* UAC2/UAC1 unit IDs overlap here in an
775 * uncompatible way. Ignore this unit for now.
776 */
777 return 0;
778 }
779
780 if (d->bNrInPins) {
781 id = d->baSourceID[0];
782 break; /* continue to parse */
783 }
784 term->type = d->bDescriptorSubtype << 16; /* virtual type */
785 term->channels = uac_processing_unit_bNrChannels(d);
786 term->chconfig = uac_processing_unit_wChannelConfig(d, state->mixer->protocol);
787 term->name = uac_processing_unit_iProcessing(d, state->mixer->protocol);
788 return 0;
789 }
790 case UAC2_CLOCK_SOURCE: {
791 struct uac_clock_source_descriptor *d = p1;
792 term->type = d->bDescriptorSubtype << 16; /* virtual type */
793 term->id = id;
794 term->name = d->iClockSource;
795 return 0;
796 }
797 default:
798 return -ENODEV;
799 }
800 }
801 return -ENODEV;
802 }
803
804 /*
805 * Feature Unit
806 */
807
808 /* feature unit control information */
809 struct usb_feature_control_info {
810 const char *name;
811 int type; /* data type for uac1 */
812 int type_uac2; /* data type for uac2 if different from uac1, else -1 */
813 };
814
815 static struct usb_feature_control_info audio_feature_info[] = {
816 { "Mute", USB_MIXER_INV_BOOLEAN, -1 },
817 { "Volume", USB_MIXER_S16, -1 },
818 { "Tone Control - Bass", USB_MIXER_S8, -1 },
819 { "Tone Control - Mid", USB_MIXER_S8, -1 },
820 { "Tone Control - Treble", USB_MIXER_S8, -1 },
821 { "Graphic Equalizer", USB_MIXER_S8, -1 }, /* FIXME: not implemeted yet */
822 { "Auto Gain Control", USB_MIXER_BOOLEAN, -1 },
823 { "Delay Control", USB_MIXER_U16, USB_MIXER_U32 },
824 { "Bass Boost", USB_MIXER_BOOLEAN, -1 },
825 { "Loudness", USB_MIXER_BOOLEAN, -1 },
826 /* UAC2 specific */
827 { "Input Gain Control", USB_MIXER_S16, -1 },
828 { "Input Gain Pad Control", USB_MIXER_S16, -1 },
829 { "Phase Inverter Control", USB_MIXER_BOOLEAN, -1 },
830 };
831
832 /* private_free callback */
833 void snd_usb_mixer_elem_free(struct snd_kcontrol *kctl)
834 {
835 kfree(kctl->private_data);
836 kctl->private_data = NULL;
837 }
838
839 /*
840 * interface to ALSA control for feature/mixer units
841 */
842
843 /* volume control quirks */
844 static void volume_control_quirks(struct usb_mixer_elem_info *cval,
845 struct snd_kcontrol *kctl)
846 {
847 struct snd_usb_audio *chip = cval->head.mixer->chip;
848 switch (chip->usb_id) {
849 case USB_ID(0x0763, 0x2030): /* M-Audio Fast Track C400 */
850 case USB_ID(0x0763, 0x2031): /* M-Audio Fast Track C600 */
851 if (strcmp(kctl->id.name, "Effect Duration") == 0) {
852 cval->min = 0x0000;
853 cval->max = 0xffff;
854 cval->res = 0x00e6;
855 break;
856 }
857 if (strcmp(kctl->id.name, "Effect Volume") == 0 ||
858 strcmp(kctl->id.name, "Effect Feedback Volume") == 0) {
859 cval->min = 0x00;
860 cval->max = 0xff;
861 break;
862 }
863 if (strstr(kctl->id.name, "Effect Return") != NULL) {
864 cval->min = 0xb706;
865 cval->max = 0xff7b;
866 cval->res = 0x0073;
867 break;
868 }
869 if ((strstr(kctl->id.name, "Playback Volume") != NULL) ||
870 (strstr(kctl->id.name, "Effect Send") != NULL)) {
871 cval->min = 0xb5fb; /* -73 dB = 0xb6ff */
872 cval->max = 0xfcfe;
873 cval->res = 0x0073;
874 }
875 break;
876
877 case USB_ID(0x0763, 0x2081): /* M-Audio Fast Track Ultra 8R */
878 case USB_ID(0x0763, 0x2080): /* M-Audio Fast Track Ultra */
879 if (strcmp(kctl->id.name, "Effect Duration") == 0) {
880 usb_audio_info(chip,
881 "set quirk for FTU Effect Duration\n");
882 cval->min = 0x0000;
883 cval->max = 0x7f00;
884 cval->res = 0x0100;
885 break;
886 }
887 if (strcmp(kctl->id.name, "Effect Volume") == 0 ||
888 strcmp(kctl->id.name, "Effect Feedback Volume") == 0) {
889 usb_audio_info(chip,
890 "set quirks for FTU Effect Feedback/Volume\n");
891 cval->min = 0x00;
892 cval->max = 0x7f;
893 break;
894 }
895 break;
896
897 case USB_ID(0x0471, 0x0101):
898 case USB_ID(0x0471, 0x0104):
899 case USB_ID(0x0471, 0x0105):
900 case USB_ID(0x0672, 0x1041):
901 /* quirk for UDA1321/N101.
902 * note that detection between firmware 2.1.1.7 (N101)
903 * and later 2.1.1.21 is not very clear from datasheets.
904 * I hope that the min value is -15360 for newer firmware --jk
905 */
906 if (!strcmp(kctl->id.name, "PCM Playback Volume") &&
907 cval->min == -15616) {
908 usb_audio_info(chip,
909 "set volume quirk for UDA1321/N101 chip\n");
910 cval->max = -256;
911 }
912 break;
913
914 case USB_ID(0x046d, 0x09a4):
915 if (!strcmp(kctl->id.name, "Mic Capture Volume")) {
916 usb_audio_info(chip,
917 "set volume quirk for QuickCam E3500\n");
918 cval->min = 6080;
919 cval->max = 8768;
920 cval->res = 192;
921 }
922 break;
923
924 case USB_ID(0x046d, 0x0807): /* Logitech Webcam C500 */
925 case USB_ID(0x046d, 0x0808):
926 case USB_ID(0x046d, 0x0809):
927 case USB_ID(0x046d, 0x0819): /* Logitech Webcam C210 */
928 case USB_ID(0x046d, 0x081b): /* HD Webcam c310 */
929 case USB_ID(0x046d, 0x081d): /* HD Webcam c510 */
930 case USB_ID(0x046d, 0x0825): /* HD Webcam c270 */
931 case USB_ID(0x046d, 0x0826): /* HD Webcam c525 */
932 case USB_ID(0x046d, 0x08ca): /* Logitech Quickcam Fusion */
933 case USB_ID(0x046d, 0x0991):
934 /* Most audio usb devices lie about volume resolution.
935 * Most Logitech webcams have res = 384.
936 * Proboly there is some logitech magic behind this number --fishor
937 */
938 if (!strcmp(kctl->id.name, "Mic Capture Volume")) {
939 usb_audio_info(chip,
940 "set resolution quirk: cval->res = 384\n");
941 cval->res = 384;
942 }
943 break;
944 }
945 }
946
947 /*
948 * retrieve the minimum and maximum values for the specified control
949 */
950 static int get_min_max_with_quirks(struct usb_mixer_elem_info *cval,
951 int default_min, struct snd_kcontrol *kctl)
952 {
953 /* for failsafe */
954 cval->min = default_min;
955 cval->max = cval->min + 1;
956 cval->res = 1;
957 cval->dBmin = cval->dBmax = 0;
958
959 if (cval->val_type == USB_MIXER_BOOLEAN ||
960 cval->val_type == USB_MIXER_INV_BOOLEAN) {
961 cval->initialized = 1;
962 } else {
963 int minchn = 0;
964 if (cval->cmask) {
965 int i;
966 for (i = 0; i < MAX_CHANNELS; i++)
967 if (cval->cmask & (1 << i)) {
968 minchn = i + 1;
969 break;
970 }
971 }
972 if (get_ctl_value(cval, UAC_GET_MAX, (cval->control << 8) | minchn, &cval->max) < 0 ||
973 get_ctl_value(cval, UAC_GET_MIN, (cval->control << 8) | minchn, &cval->min) < 0) {
974 usb_audio_err(cval->head.mixer->chip,
975 "%d:%d: cannot get min/max values for control %d (id %d)\n",
976 cval->head.id, snd_usb_ctrl_intf(cval->head.mixer->chip),
977 cval->control, cval->head.id);
978 return -EINVAL;
979 }
980 if (get_ctl_value(cval, UAC_GET_RES,
981 (cval->control << 8) | minchn,
982 &cval->res) < 0) {
983 cval->res = 1;
984 } else {
985 int last_valid_res = cval->res;
986
987 while (cval->res > 1) {
988 if (snd_usb_mixer_set_ctl_value(cval, UAC_SET_RES,
989 (cval->control << 8) | minchn,
990 cval->res / 2) < 0)
991 break;
992 cval->res /= 2;
993 }
994 if (get_ctl_value(cval, UAC_GET_RES,
995 (cval->control << 8) | minchn, &cval->res) < 0)
996 cval->res = last_valid_res;
997 }
998 if (cval->res == 0)
999 cval->res = 1;
1000
1001 /* Additional checks for the proper resolution
1002 *
1003 * Some devices report smaller resolutions than actually
1004 * reacting. They don't return errors but simply clip
1005 * to the lower aligned value.
1006 */
1007 if (cval->min + cval->res < cval->max) {
1008 int last_valid_res = cval->res;
1009 int saved, test, check;
1010 get_cur_mix_raw(cval, minchn, &saved);
1011 for (;;) {
1012 test = saved;
1013 if (test < cval->max)
1014 test += cval->res;
1015 else
1016 test -= cval->res;
1017 if (test < cval->min || test > cval->max ||
1018 snd_usb_set_cur_mix_value(cval, minchn, 0, test) ||
1019 get_cur_mix_raw(cval, minchn, &check)) {
1020 cval->res = last_valid_res;
1021 break;
1022 }
1023 if (test == check)
1024 break;
1025 cval->res *= 2;
1026 }
1027 snd_usb_set_cur_mix_value(cval, minchn, 0, saved);
1028 }
1029
1030 cval->initialized = 1;
1031 }
1032
1033 if (kctl)
1034 volume_control_quirks(cval, kctl);
1035
1036 /* USB descriptions contain the dB scale in 1/256 dB unit
1037 * while ALSA TLV contains in 1/100 dB unit
1038 */
1039 cval->dBmin = (convert_signed_value(cval, cval->min) * 100) / 256;
1040 cval->dBmax = (convert_signed_value(cval, cval->max) * 100) / 256;
1041 if (cval->dBmin > cval->dBmax) {
1042 /* something is wrong; assume it's either from/to 0dB */
1043 if (cval->dBmin < 0)
1044 cval->dBmax = 0;
1045 else if (cval->dBmin > 0)
1046 cval->dBmin = 0;
1047 if (cval->dBmin > cval->dBmax) {
1048 /* totally crap, return an error */
1049 return -EINVAL;
1050 }
1051 }
1052
1053 return 0;
1054 }
1055
1056 #define get_min_max(cval, def) get_min_max_with_quirks(cval, def, NULL)
1057
1058 /* get a feature/mixer unit info */
1059 static int mixer_ctl_feature_info(struct snd_kcontrol *kcontrol,
1060 struct snd_ctl_elem_info *uinfo)
1061 {
1062 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1063
1064 if (cval->val_type == USB_MIXER_BOOLEAN ||
1065 cval->val_type == USB_MIXER_INV_BOOLEAN)
1066 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1067 else
1068 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
1069 uinfo->count = cval->channels;
1070 if (cval->val_type == USB_MIXER_BOOLEAN ||
1071 cval->val_type == USB_MIXER_INV_BOOLEAN) {
1072 uinfo->value.integer.min = 0;
1073 uinfo->value.integer.max = 1;
1074 } else {
1075 if (!cval->initialized) {
1076 get_min_max_with_quirks(cval, 0, kcontrol);
1077 if (cval->initialized && cval->dBmin >= cval->dBmax) {
1078 kcontrol->vd[0].access &=
1079 ~(SNDRV_CTL_ELEM_ACCESS_TLV_READ |
1080 SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK);
1081 snd_ctl_notify(cval->head.mixer->chip->card,
1082 SNDRV_CTL_EVENT_MASK_INFO,
1083 &kcontrol->id);
1084 }
1085 }
1086 uinfo->value.integer.min = 0;
1087 uinfo->value.integer.max =
1088 (cval->max - cval->min + cval->res - 1) / cval->res;
1089 }
1090 return 0;
1091 }
1092
1093 /* get the current value from feature/mixer unit */
1094 static int mixer_ctl_feature_get(struct snd_kcontrol *kcontrol,
1095 struct snd_ctl_elem_value *ucontrol)
1096 {
1097 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1098 int c, cnt, val, err;
1099
1100 ucontrol->value.integer.value[0] = cval->min;
1101 if (cval->cmask) {
1102 cnt = 0;
1103 for (c = 0; c < MAX_CHANNELS; c++) {
1104 if (!(cval->cmask & (1 << c)))
1105 continue;
1106 err = snd_usb_get_cur_mix_value(cval, c + 1, cnt, &val);
1107 if (err < 0)
1108 return filter_error(cval, err);
1109 val = get_relative_value(cval, val);
1110 ucontrol->value.integer.value[cnt] = val;
1111 cnt++;
1112 }
1113 return 0;
1114 } else {
1115 /* master channel */
1116 err = snd_usb_get_cur_mix_value(cval, 0, 0, &val);
1117 if (err < 0)
1118 return filter_error(cval, err);
1119 val = get_relative_value(cval, val);
1120 ucontrol->value.integer.value[0] = val;
1121 }
1122 return 0;
1123 }
1124
1125 /* put the current value to feature/mixer unit */
1126 static int mixer_ctl_feature_put(struct snd_kcontrol *kcontrol,
1127 struct snd_ctl_elem_value *ucontrol)
1128 {
1129 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1130 int c, cnt, val, oval, err;
1131 int changed = 0;
1132
1133 if (cval->cmask) {
1134 cnt = 0;
1135 for (c = 0; c < MAX_CHANNELS; c++) {
1136 if (!(cval->cmask & (1 << c)))
1137 continue;
1138 err = snd_usb_get_cur_mix_value(cval, c + 1, cnt, &oval);
1139 if (err < 0)
1140 return filter_error(cval, err);
1141 val = ucontrol->value.integer.value[cnt];
1142 val = get_abs_value(cval, val);
1143 if (oval != val) {
1144 snd_usb_set_cur_mix_value(cval, c + 1, cnt, val);
1145 changed = 1;
1146 }
1147 cnt++;
1148 }
1149 } else {
1150 /* master channel */
1151 err = snd_usb_get_cur_mix_value(cval, 0, 0, &oval);
1152 if (err < 0)
1153 return filter_error(cval, err);
1154 val = ucontrol->value.integer.value[0];
1155 val = get_abs_value(cval, val);
1156 if (val != oval) {
1157 snd_usb_set_cur_mix_value(cval, 0, 0, val);
1158 changed = 1;
1159 }
1160 }
1161 return changed;
1162 }
1163
1164 static struct snd_kcontrol_new usb_feature_unit_ctl = {
1165 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1166 .name = "", /* will be filled later manually */
1167 .info = mixer_ctl_feature_info,
1168 .get = mixer_ctl_feature_get,
1169 .put = mixer_ctl_feature_put,
1170 };
1171
1172 /* the read-only variant */
1173 static struct snd_kcontrol_new usb_feature_unit_ctl_ro = {
1174 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1175 .name = "", /* will be filled later manually */
1176 .info = mixer_ctl_feature_info,
1177 .get = mixer_ctl_feature_get,
1178 .put = NULL,
1179 };
1180
1181 /*
1182 * This symbol is exported in order to allow the mixer quirks to
1183 * hook up to the standard feature unit control mechanism
1184 */
1185 struct snd_kcontrol_new *snd_usb_feature_unit_ctl = &usb_feature_unit_ctl;
1186
1187 /*
1188 * build a feature control
1189 */
1190 static size_t append_ctl_name(struct snd_kcontrol *kctl, const char *str)
1191 {
1192 return strlcat(kctl->id.name, str, sizeof(kctl->id.name));
1193 }
1194
1195 /*
1196 * A lot of headsets/headphones have a "Speaker" mixer. Make sure we
1197 * rename it to "Headphone". We determine if something is a headphone
1198 * similar to how udev determines form factor.
1199 */
1200 static void check_no_speaker_on_headset(struct snd_kcontrol *kctl,
1201 struct snd_card *card)
1202 {
1203 const char *names_to_check[] = {
1204 "Headset", "headset", "Headphone", "headphone", NULL};
1205 const char **s;
1206 bool found = false;
1207
1208 if (strcmp("Speaker", kctl->id.name))
1209 return;
1210
1211 for (s = names_to_check; *s; s++)
1212 if (strstr(card->shortname, *s)) {
1213 found = true;
1214 break;
1215 }
1216
1217 if (!found)
1218 return;
1219
1220 strlcpy(kctl->id.name, "Headphone", sizeof(kctl->id.name));
1221 }
1222
1223 static void build_feature_ctl(struct mixer_build *state, void *raw_desc,
1224 unsigned int ctl_mask, int control,
1225 struct usb_audio_term *iterm, int unitid,
1226 int readonly_mask)
1227 {
1228 struct uac_feature_unit_descriptor *desc = raw_desc;
1229 struct usb_feature_control_info *ctl_info;
1230 unsigned int len = 0;
1231 int mapped_name = 0;
1232 int nameid = uac_feature_unit_iFeature(desc);
1233 struct snd_kcontrol *kctl;
1234 struct usb_mixer_elem_info *cval;
1235 const struct usbmix_name_map *map;
1236 unsigned int range;
1237
1238 control++; /* change from zero-based to 1-based value */
1239
1240 if (control == UAC_FU_GRAPHIC_EQUALIZER) {
1241 /* FIXME: not supported yet */
1242 return;
1243 }
1244
1245 map = find_map(state, unitid, control);
1246 if (check_ignored_ctl(map))
1247 return;
1248
1249 cval = kzalloc(sizeof(*cval), GFP_KERNEL);
1250 if (!cval)
1251 return;
1252 snd_usb_mixer_elem_init_std(&cval->head, state->mixer, unitid);
1253 cval->control = control;
1254 cval->cmask = ctl_mask;
1255 ctl_info = &audio_feature_info[control-1];
1256 if (state->mixer->protocol == UAC_VERSION_1)
1257 cval->val_type = ctl_info->type;
1258 else /* UAC_VERSION_2 */
1259 cval->val_type = ctl_info->type_uac2 >= 0 ?
1260 ctl_info->type_uac2 : ctl_info->type;
1261
1262 if (ctl_mask == 0) {
1263 cval->channels = 1; /* master channel */
1264 cval->master_readonly = readonly_mask;
1265 } else {
1266 int i, c = 0;
1267 for (i = 0; i < 16; i++)
1268 if (ctl_mask & (1 << i))
1269 c++;
1270 cval->channels = c;
1271 cval->ch_readonly = readonly_mask;
1272 }
1273
1274 /*
1275 * If all channels in the mask are marked read-only, make the control
1276 * read-only. snd_usb_set_cur_mix_value() will check the mask again and won't
1277 * issue write commands to read-only channels.
1278 */
1279 if (cval->channels == readonly_mask)
1280 kctl = snd_ctl_new1(&usb_feature_unit_ctl_ro, cval);
1281 else
1282 kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval);
1283
1284 if (!kctl) {
1285 usb_audio_err(state->chip, "cannot malloc kcontrol\n");
1286 kfree(cval);
1287 return;
1288 }
1289 kctl->private_free = snd_usb_mixer_elem_free;
1290
1291 len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name));
1292 mapped_name = len != 0;
1293 if (!len && nameid)
1294 len = snd_usb_copy_string_desc(state, nameid,
1295 kctl->id.name, sizeof(kctl->id.name));
1296
1297 switch (control) {
1298 case UAC_FU_MUTE:
1299 case UAC_FU_VOLUME:
1300 /*
1301 * determine the control name. the rule is:
1302 * - if a name id is given in descriptor, use it.
1303 * - if the connected input can be determined, then use the name
1304 * of terminal type.
1305 * - if the connected output can be determined, use it.
1306 * - otherwise, anonymous name.
1307 */
1308 if (!len) {
1309 len = get_term_name(state, iterm, kctl->id.name,
1310 sizeof(kctl->id.name), 1);
1311 if (!len)
1312 len = get_term_name(state, &state->oterm,
1313 kctl->id.name,
1314 sizeof(kctl->id.name), 1);
1315 if (!len)
1316 snprintf(kctl->id.name, sizeof(kctl->id.name),
1317 "Feature %d", unitid);
1318 }
1319
1320 if (!mapped_name)
1321 check_no_speaker_on_headset(kctl, state->mixer->chip->card);
1322
1323 /*
1324 * determine the stream direction:
1325 * if the connected output is USB stream, then it's likely a
1326 * capture stream. otherwise it should be playback (hopefully :)
1327 */
1328 if (!mapped_name && !(state->oterm.type >> 16)) {
1329 if ((state->oterm.type & 0xff00) == 0x0100)
1330 append_ctl_name(kctl, " Capture");
1331 else
1332 append_ctl_name(kctl, " Playback");
1333 }
1334 append_ctl_name(kctl, control == UAC_FU_MUTE ?
1335 " Switch" : " Volume");
1336 break;
1337 default:
1338 if (!len)
1339 strlcpy(kctl->id.name, audio_feature_info[control-1].name,
1340 sizeof(kctl->id.name));
1341 break;
1342 }
1343
1344 /* get min/max values */
1345 get_min_max_with_quirks(cval, 0, kctl);
1346
1347 if (control == UAC_FU_VOLUME) {
1348 check_mapped_dB(map, cval);
1349 if (cval->dBmin < cval->dBmax || !cval->initialized) {
1350 kctl->tlv.c = snd_usb_mixer_vol_tlv;
1351 kctl->vd[0].access |=
1352 SNDRV_CTL_ELEM_ACCESS_TLV_READ |
1353 SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK;
1354 }
1355 }
1356
1357 range = (cval->max - cval->min) / cval->res;
1358 /*
1359 * Are there devices with volume range more than 255? I use a bit more
1360 * to be sure. 384 is a resolution magic number found on Logitech
1361 * devices. It will definitively catch all buggy Logitech devices.
1362 */
1363 if (range > 384) {
1364 usb_audio_warn(state->chip,
1365 "Warning! Unlikely big volume range (=%u), cval->res is probably wrong.",
1366 range);
1367 usb_audio_warn(state->chip,
1368 "[%d] FU [%s] ch = %d, val = %d/%d/%d",
1369 cval->head.id, kctl->id.name, cval->channels,
1370 cval->min, cval->max, cval->res);
1371 }
1372
1373 usb_audio_dbg(state->chip, "[%d] FU [%s] ch = %d, val = %d/%d/%d\n",
1374 cval->head.id, kctl->id.name, cval->channels,
1375 cval->min, cval->max, cval->res);
1376 snd_usb_mixer_add_control(&cval->head, kctl);
1377 }
1378
1379 /*
1380 * parse a feature unit
1381 *
1382 * most of controls are defined here.
1383 */
1384 static int parse_audio_feature_unit(struct mixer_build *state, int unitid,
1385 void *_ftr)
1386 {
1387 int channels, i, j;
1388 struct usb_audio_term iterm;
1389 unsigned int master_bits, first_ch_bits;
1390 int err, csize;
1391 struct uac_feature_unit_descriptor *hdr = _ftr;
1392 __u8 *bmaControls;
1393
1394 if (state->mixer->protocol == UAC_VERSION_1) {
1395 csize = hdr->bControlSize;
1396 if (!csize) {
1397 usb_audio_dbg(state->chip,
1398 "unit %u: invalid bControlSize == 0\n",
1399 unitid);
1400 return -EINVAL;
1401 }
1402 channels = (hdr->bLength - 7) / csize - 1;
1403 bmaControls = hdr->bmaControls;
1404 if (hdr->bLength < 7 + csize) {
1405 usb_audio_err(state->chip,
1406 "unit %u: invalid UAC_FEATURE_UNIT descriptor\n",
1407 unitid);
1408 return -EINVAL;
1409 }
1410 } else {
1411 struct uac2_feature_unit_descriptor *ftr = _ftr;
1412 csize = 4;
1413 channels = (hdr->bLength - 6) / 4 - 1;
1414 bmaControls = ftr->bmaControls;
1415 if (hdr->bLength < 6 + csize) {
1416 usb_audio_err(state->chip,
1417 "unit %u: invalid UAC_FEATURE_UNIT descriptor\n",
1418 unitid);
1419 return -EINVAL;
1420 }
1421 }
1422
1423 /* parse the source unit */
1424 if ((err = parse_audio_unit(state, hdr->bSourceID)) < 0)
1425 return err;
1426
1427 /* determine the input source type and name */
1428 err = check_input_term(state, hdr->bSourceID, &iterm);
1429 if (err < 0)
1430 return err;
1431
1432 master_bits = snd_usb_combine_bytes(bmaControls, csize);
1433 /* master configuration quirks */
1434 switch (state->chip->usb_id) {
1435 case USB_ID(0x08bb, 0x2702):
1436 usb_audio_info(state->chip,
1437 "usbmixer: master volume quirk for PCM2702 chip\n");
1438 /* disable non-functional volume control */
1439 master_bits &= ~UAC_CONTROL_BIT(UAC_FU_VOLUME);
1440 break;
1441 case USB_ID(0x1130, 0xf211):
1442 usb_audio_info(state->chip,
1443 "usbmixer: volume control quirk for Tenx TP6911 Audio Headset\n");
1444 /* disable non-functional volume control */
1445 channels = 0;
1446 break;
1447
1448 }
1449 if (channels > 0)
1450 first_ch_bits = snd_usb_combine_bytes(bmaControls + csize, csize);
1451 else
1452 first_ch_bits = 0;
1453
1454 if (state->mixer->protocol == UAC_VERSION_1) {
1455 /* check all control types */
1456 for (i = 0; i < 10; i++) {
1457 unsigned int ch_bits = 0;
1458 for (j = 0; j < channels; j++) {
1459 unsigned int mask;
1460
1461 mask = snd_usb_combine_bytes(bmaControls +
1462 csize * (j+1), csize);
1463 if (mask & (1 << i))
1464 ch_bits |= (1 << j);
1465 }
1466 /* audio class v1 controls are never read-only */
1467
1468 /*
1469 * The first channel must be set
1470 * (for ease of programming).
1471 */
1472 if (ch_bits & 1)
1473 build_feature_ctl(state, _ftr, ch_bits, i,
1474 &iterm, unitid, 0);
1475 if (master_bits & (1 << i))
1476 build_feature_ctl(state, _ftr, 0, i, &iterm,
1477 unitid, 0);
1478 }
1479 } else { /* UAC_VERSION_2 */
1480 for (i = 0; i < ARRAY_SIZE(audio_feature_info); i++) {
1481 unsigned int ch_bits = 0;
1482 unsigned int ch_read_only = 0;
1483
1484 for (j = 0; j < channels; j++) {
1485 unsigned int mask;
1486
1487 mask = snd_usb_combine_bytes(bmaControls +
1488 csize * (j+1), csize);
1489 if (uac2_control_is_readable(mask, i)) {
1490 ch_bits |= (1 << j);
1491 if (!uac2_control_is_writeable(mask, i))
1492 ch_read_only |= (1 << j);
1493 }
1494 }
1495
1496 /*
1497 * NOTE: build_feature_ctl() will mark the control
1498 * read-only if all channels are marked read-only in
1499 * the descriptors. Otherwise, the control will be
1500 * reported as writeable, but the driver will not
1501 * actually issue a write command for read-only
1502 * channels.
1503 */
1504
1505 /*
1506 * The first channel must be set
1507 * (for ease of programming).
1508 */
1509 if (ch_bits & 1)
1510 build_feature_ctl(state, _ftr, ch_bits, i,
1511 &iterm, unitid, ch_read_only);
1512 if (uac2_control_is_readable(master_bits, i))
1513 build_feature_ctl(state, _ftr, 0, i, &iterm, unitid,
1514 !uac2_control_is_writeable(master_bits, i));
1515 }
1516 }
1517
1518 return 0;
1519 }
1520
1521 /*
1522 * Mixer Unit
1523 */
1524
1525 /*
1526 * build a mixer unit control
1527 *
1528 * the callbacks are identical with feature unit.
1529 * input channel number (zero based) is given in control field instead.
1530 */
1531 static void build_mixer_unit_ctl(struct mixer_build *state,
1532 struct uac_mixer_unit_descriptor *desc,
1533 int in_pin, int in_ch, int unitid,
1534 struct usb_audio_term *iterm)
1535 {
1536 struct usb_mixer_elem_info *cval;
1537 unsigned int num_outs = uac_mixer_unit_bNrChannels(desc);
1538 unsigned int i, len;
1539 struct snd_kcontrol *kctl;
1540 const struct usbmix_name_map *map;
1541
1542 map = find_map(state, unitid, 0);
1543 if (check_ignored_ctl(map))
1544 return;
1545
1546 cval = kzalloc(sizeof(*cval), GFP_KERNEL);
1547 if (!cval)
1548 return;
1549
1550 snd_usb_mixer_elem_init_std(&cval->head, state->mixer, unitid);
1551 cval->control = in_ch + 1; /* based on 1 */
1552 cval->val_type = USB_MIXER_S16;
1553 for (i = 0; i < num_outs; i++) {
1554 __u8 *c = uac_mixer_unit_bmControls(desc, state->mixer->protocol);
1555
1556 if (check_matrix_bitmap(c, in_ch, i, num_outs)) {
1557 cval->cmask |= (1 << i);
1558 cval->channels++;
1559 }
1560 }
1561
1562 /* get min/max values */
1563 get_min_max(cval, 0);
1564
1565 kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval);
1566 if (!kctl) {
1567 usb_audio_err(state->chip, "cannot malloc kcontrol\n");
1568 kfree(cval);
1569 return;
1570 }
1571 kctl->private_free = snd_usb_mixer_elem_free;
1572
1573 len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name));
1574 if (!len)
1575 len = get_term_name(state, iterm, kctl->id.name,
1576 sizeof(kctl->id.name), 0);
1577 if (!len)
1578 len = sprintf(kctl->id.name, "Mixer Source %d", in_ch + 1);
1579 append_ctl_name(kctl, " Volume");
1580
1581 usb_audio_dbg(state->chip, "[%d] MU [%s] ch = %d, val = %d/%d\n",
1582 cval->head.id, kctl->id.name, cval->channels, cval->min, cval->max);
1583 snd_usb_mixer_add_control(&cval->head, kctl);
1584 }
1585
1586 /*
1587 * parse a mixer unit
1588 */
1589 static int parse_audio_mixer_unit(struct mixer_build *state, int unitid,
1590 void *raw_desc)
1591 {
1592 struct uac_mixer_unit_descriptor *desc = raw_desc;
1593 struct usb_audio_term iterm;
1594 int input_pins, num_ins, num_outs;
1595 int pin, ich, err;
1596
1597 if (desc->bLength < 11 || !(input_pins = desc->bNrInPins) ||
1598 !(num_outs = uac_mixer_unit_bNrChannels(desc))) {
1599 usb_audio_err(state->chip,
1600 "invalid MIXER UNIT descriptor %d\n",
1601 unitid);
1602 return -EINVAL;
1603 }
1604
1605 num_ins = 0;
1606 ich = 0;
1607 for (pin = 0; pin < input_pins; pin++) {
1608 err = parse_audio_unit(state, desc->baSourceID[pin]);
1609 if (err < 0)
1610 continue;
1611 /* no bmControls field (e.g. Maya44) -> ignore */
1612 if (desc->bLength <= 10 + input_pins)
1613 continue;
1614 err = check_input_term(state, desc->baSourceID[pin], &iterm);
1615 if (err < 0)
1616 return err;
1617 num_ins += iterm.channels;
1618 for (; ich < num_ins; ich++) {
1619 int och, ich_has_controls = 0;
1620
1621 for (och = 0; och < num_outs; och++) {
1622 __u8 *c = uac_mixer_unit_bmControls(desc,
1623 state->mixer->protocol);
1624
1625 if (check_matrix_bitmap(c, ich, och, num_outs)) {
1626 ich_has_controls = 1;
1627 break;
1628 }
1629 }
1630 if (ich_has_controls)
1631 build_mixer_unit_ctl(state, desc, pin, ich,
1632 unitid, &iterm);
1633 }
1634 }
1635 return 0;
1636 }
1637
1638 /*
1639 * Processing Unit / Extension Unit
1640 */
1641
1642 /* get callback for processing/extension unit */
1643 static int mixer_ctl_procunit_get(struct snd_kcontrol *kcontrol,
1644 struct snd_ctl_elem_value *ucontrol)
1645 {
1646 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1647 int err, val;
1648
1649 err = get_cur_ctl_value(cval, cval->control << 8, &val);
1650 if (err < 0) {
1651 ucontrol->value.integer.value[0] = cval->min;
1652 return filter_error(cval, err);
1653 }
1654 val = get_relative_value(cval, val);
1655 ucontrol->value.integer.value[0] = val;
1656 return 0;
1657 }
1658
1659 /* put callback for processing/extension unit */
1660 static int mixer_ctl_procunit_put(struct snd_kcontrol *kcontrol,
1661 struct snd_ctl_elem_value *ucontrol)
1662 {
1663 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1664 int val, oval, err;
1665
1666 err = get_cur_ctl_value(cval, cval->control << 8, &oval);
1667 if (err < 0)
1668 return filter_error(cval, err);
1669 val = ucontrol->value.integer.value[0];
1670 val = get_abs_value(cval, val);
1671 if (val != oval) {
1672 set_cur_ctl_value(cval, cval->control << 8, val);
1673 return 1;
1674 }
1675 return 0;
1676 }
1677
1678 /* alsa control interface for processing/extension unit */
1679 static struct snd_kcontrol_new mixer_procunit_ctl = {
1680 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1681 .name = "", /* will be filled later */
1682 .info = mixer_ctl_feature_info,
1683 .get = mixer_ctl_procunit_get,
1684 .put = mixer_ctl_procunit_put,
1685 };
1686
1687 /*
1688 * predefined data for processing units
1689 */
1690 struct procunit_value_info {
1691 int control;
1692 char *suffix;
1693 int val_type;
1694 int min_value;
1695 };
1696
1697 struct procunit_info {
1698 int type;
1699 char *name;
1700 struct procunit_value_info *values;
1701 };
1702
1703 static struct procunit_value_info updown_proc_info[] = {
1704 { UAC_UD_ENABLE, "Switch", USB_MIXER_BOOLEAN },
1705 { UAC_UD_MODE_SELECT, "Mode Select", USB_MIXER_U8, 1 },
1706 { 0 }
1707 };
1708 static struct procunit_value_info prologic_proc_info[] = {
1709 { UAC_DP_ENABLE, "Switch", USB_MIXER_BOOLEAN },
1710 { UAC_DP_MODE_SELECT, "Mode Select", USB_MIXER_U8, 1 },
1711 { 0 }
1712 };
1713 static struct procunit_value_info threed_enh_proc_info[] = {
1714 { UAC_3D_ENABLE, "Switch", USB_MIXER_BOOLEAN },
1715 { UAC_3D_SPACE, "Spaciousness", USB_MIXER_U8 },
1716 { 0 }
1717 };
1718 static struct procunit_value_info reverb_proc_info[] = {
1719 { UAC_REVERB_ENABLE, "Switch", USB_MIXER_BOOLEAN },
1720 { UAC_REVERB_LEVEL, "Level", USB_MIXER_U8 },
1721 { UAC_REVERB_TIME, "Time", USB_MIXER_U16 },
1722 { UAC_REVERB_FEEDBACK, "Feedback", USB_MIXER_U8 },
1723 { 0 }
1724 };
1725 static struct procunit_value_info chorus_proc_info[] = {
1726 { UAC_CHORUS_ENABLE, "Switch", USB_MIXER_BOOLEAN },
1727 { UAC_CHORUS_LEVEL, "Level", USB_MIXER_U8 },
1728 { UAC_CHORUS_RATE, "Rate", USB_MIXER_U16 },
1729 { UAC_CHORUS_DEPTH, "Depth", USB_MIXER_U16 },
1730 { 0 }
1731 };
1732 static struct procunit_value_info dcr_proc_info[] = {
1733 { UAC_DCR_ENABLE, "Switch", USB_MIXER_BOOLEAN },
1734 { UAC_DCR_RATE, "Ratio", USB_MIXER_U16 },
1735 { UAC_DCR_MAXAMPL, "Max Amp", USB_MIXER_S16 },
1736 { UAC_DCR_THRESHOLD, "Threshold", USB_MIXER_S16 },
1737 { UAC_DCR_ATTACK_TIME, "Attack Time", USB_MIXER_U16 },
1738 { UAC_DCR_RELEASE_TIME, "Release Time", USB_MIXER_U16 },
1739 { 0 }
1740 };
1741
1742 static struct procunit_info procunits[] = {
1743 { UAC_PROCESS_UP_DOWNMIX, "Up Down", updown_proc_info },
1744 { UAC_PROCESS_DOLBY_PROLOGIC, "Dolby Prologic", prologic_proc_info },
1745 { UAC_PROCESS_STEREO_EXTENDER, "3D Stereo Extender", threed_enh_proc_info },
1746 { UAC_PROCESS_REVERB, "Reverb", reverb_proc_info },
1747 { UAC_PROCESS_CHORUS, "Chorus", chorus_proc_info },
1748 { UAC_PROCESS_DYN_RANGE_COMP, "DCR", dcr_proc_info },
1749 { 0 },
1750 };
1751 /*
1752 * predefined data for extension units
1753 */
1754 static struct procunit_value_info clock_rate_xu_info[] = {
1755 { USB_XU_CLOCK_RATE_SELECTOR, "Selector", USB_MIXER_U8, 0 },
1756 { 0 }
1757 };
1758 static struct procunit_value_info clock_source_xu_info[] = {
1759 { USB_XU_CLOCK_SOURCE_SELECTOR, "External", USB_MIXER_BOOLEAN },
1760 { 0 }
1761 };
1762 static struct procunit_value_info spdif_format_xu_info[] = {
1763 { USB_XU_DIGITAL_FORMAT_SELECTOR, "SPDIF/AC3", USB_MIXER_BOOLEAN },
1764 { 0 }
1765 };
1766 static struct procunit_value_info soft_limit_xu_info[] = {
1767 { USB_XU_SOFT_LIMIT_SELECTOR, " ", USB_MIXER_BOOLEAN },
1768 { 0 }
1769 };
1770 static struct procunit_info extunits[] = {
1771 { USB_XU_CLOCK_RATE, "Clock rate", clock_rate_xu_info },
1772 { USB_XU_CLOCK_SOURCE, "DigitalIn CLK source", clock_source_xu_info },
1773 { USB_XU_DIGITAL_IO_STATUS, "DigitalOut format:", spdif_format_xu_info },
1774 { USB_XU_DEVICE_OPTIONS, "AnalogueIn Soft Limit", soft_limit_xu_info },
1775 { 0 }
1776 };
1777
1778 /*
1779 * build a processing/extension unit
1780 */
1781 static int build_audio_procunit(struct mixer_build *state, int unitid,
1782 void *raw_desc, struct procunit_info *list,
1783 char *name)
1784 {
1785 struct uac_processing_unit_descriptor *desc = raw_desc;
1786 int num_ins = desc->bNrInPins;
1787 struct usb_mixer_elem_info *cval;
1788 struct snd_kcontrol *kctl;
1789 int i, err, nameid, type, len;
1790 struct procunit_info *info;
1791 struct procunit_value_info *valinfo;
1792 const struct usbmix_name_map *map;
1793 static struct procunit_value_info default_value_info[] = {
1794 { 0x01, "Switch", USB_MIXER_BOOLEAN },
1795 { 0 }
1796 };
1797 static struct procunit_info default_info = {
1798 0, NULL, default_value_info
1799 };
1800
1801 if (desc->bLength < 13 || desc->bLength < 13 + num_ins ||
1802 desc->bLength < num_ins + uac_processing_unit_bControlSize(desc, state->mixer->protocol)) {
1803 usb_audio_err(state->chip, "invalid %s descriptor (id %d)\n", name, unitid);
1804 return -EINVAL;
1805 }
1806
1807 for (i = 0; i < num_ins; i++) {
1808 if ((err = parse_audio_unit(state, desc->baSourceID[i])) < 0)
1809 return err;
1810 }
1811
1812 type = le16_to_cpu(desc->wProcessType);
1813 for (info = list; info && info->type; info++)
1814 if (info->type == type)
1815 break;
1816 if (!info || !info->type)
1817 info = &default_info;
1818
1819 for (valinfo = info->values; valinfo->control; valinfo++) {
1820 __u8 *controls = uac_processing_unit_bmControls(desc, state->mixer->protocol);
1821
1822 if (!(controls[valinfo->control / 8] & (1 << ((valinfo->control % 8) - 1))))
1823 continue;
1824 map = find_map(state, unitid, valinfo->control);
1825 if (check_ignored_ctl(map))
1826 continue;
1827 cval = kzalloc(sizeof(*cval), GFP_KERNEL);
1828 if (!cval)
1829 return -ENOMEM;
1830 snd_usb_mixer_elem_init_std(&cval->head, state->mixer, unitid);
1831 cval->control = valinfo->control;
1832 cval->val_type = valinfo->val_type;
1833 cval->channels = 1;
1834
1835 /* get min/max values */
1836 if (type == UAC_PROCESS_UP_DOWNMIX && cval->control == UAC_UD_MODE_SELECT) {
1837 __u8 *control_spec = uac_processing_unit_specific(desc, state->mixer->protocol);
1838 /* FIXME: hard-coded */
1839 cval->min = 1;
1840 cval->max = control_spec[0];
1841 cval->res = 1;
1842 cval->initialized = 1;
1843 } else {
1844 if (type == USB_XU_CLOCK_RATE) {
1845 /*
1846 * E-Mu USB 0404/0202/TrackerPre/0204
1847 * samplerate control quirk
1848 */
1849 cval->min = 0;
1850 cval->max = 5;
1851 cval->res = 1;
1852 cval->initialized = 1;
1853 } else
1854 get_min_max(cval, valinfo->min_value);
1855 }
1856
1857 kctl = snd_ctl_new1(&mixer_procunit_ctl, cval);
1858 if (!kctl) {
1859 kfree(cval);
1860 return -ENOMEM;
1861 }
1862 kctl->private_free = snd_usb_mixer_elem_free;
1863
1864 if (check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name))) {
1865 /* nothing */ ;
1866 } else if (info->name) {
1867 strlcpy(kctl->id.name, info->name, sizeof(kctl->id.name));
1868 } else {
1869 nameid = uac_processing_unit_iProcessing(desc, state->mixer->protocol);
1870 len = 0;
1871 if (nameid)
1872 len = snd_usb_copy_string_desc(state, nameid,
1873 kctl->id.name,
1874 sizeof(kctl->id.name));
1875 if (!len)
1876 strlcpy(kctl->id.name, name, sizeof(kctl->id.name));
1877 }
1878 append_ctl_name(kctl, " ");
1879 append_ctl_name(kctl, valinfo->suffix);
1880
1881 usb_audio_dbg(state->chip,
1882 "[%d] PU [%s] ch = %d, val = %d/%d\n",
1883 cval->head.id, kctl->id.name, cval->channels,
1884 cval->min, cval->max);
1885
1886 err = snd_usb_mixer_add_control(&cval->head, kctl);
1887 if (err < 0)
1888 return err;
1889 }
1890 return 0;
1891 }
1892
1893 static int parse_audio_processing_unit(struct mixer_build *state, int unitid,
1894 void *raw_desc)
1895 {
1896 return build_audio_procunit(state, unitid, raw_desc,
1897 procunits, "Processing Unit");
1898 }
1899
1900 static int parse_audio_extension_unit(struct mixer_build *state, int unitid,
1901 void *raw_desc)
1902 {
1903 /*
1904 * Note that we parse extension units with processing unit descriptors.
1905 * That's ok as the layout is the same.
1906 */
1907 return build_audio_procunit(state, unitid, raw_desc,
1908 extunits, "Extension Unit");
1909 }
1910
1911 /*
1912 * Selector Unit
1913 */
1914
1915 /*
1916 * info callback for selector unit
1917 * use an enumerator type for routing
1918 */
1919 static int mixer_ctl_selector_info(struct snd_kcontrol *kcontrol,
1920 struct snd_ctl_elem_info *uinfo)
1921 {
1922 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1923 const char **itemlist = (const char **)kcontrol->private_value;
1924
1925 if (snd_BUG_ON(!itemlist))
1926 return -EINVAL;
1927 return snd_ctl_enum_info(uinfo, 1, cval->max, itemlist);
1928 }
1929
1930 /* get callback for selector unit */
1931 static int mixer_ctl_selector_get(struct snd_kcontrol *kcontrol,
1932 struct snd_ctl_elem_value *ucontrol)
1933 {
1934 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1935 int val, err;
1936
1937 err = get_cur_ctl_value(cval, cval->control << 8, &val);
1938 if (err < 0) {
1939 ucontrol->value.enumerated.item[0] = 0;
1940 return filter_error(cval, err);
1941 }
1942 val = get_relative_value(cval, val);
1943 ucontrol->value.enumerated.item[0] = val;
1944 return 0;
1945 }
1946
1947 /* put callback for selector unit */
1948 static int mixer_ctl_selector_put(struct snd_kcontrol *kcontrol,
1949 struct snd_ctl_elem_value *ucontrol)
1950 {
1951 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1952 int val, oval, err;
1953
1954 err = get_cur_ctl_value(cval, cval->control << 8, &oval);
1955 if (err < 0)
1956 return filter_error(cval, err);
1957 val = ucontrol->value.enumerated.item[0];
1958 val = get_abs_value(cval, val);
1959 if (val != oval) {
1960 set_cur_ctl_value(cval, cval->control << 8, val);
1961 return 1;
1962 }
1963 return 0;
1964 }
1965
1966 /* alsa control interface for selector unit */
1967 static struct snd_kcontrol_new mixer_selectunit_ctl = {
1968 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1969 .name = "", /* will be filled later */
1970 .info = mixer_ctl_selector_info,
1971 .get = mixer_ctl_selector_get,
1972 .put = mixer_ctl_selector_put,
1973 };
1974
1975 /*
1976 * private free callback.
1977 * free both private_data and private_value
1978 */
1979 static void usb_mixer_selector_elem_free(struct snd_kcontrol *kctl)
1980 {
1981 int i, num_ins = 0;
1982
1983 if (kctl->private_data) {
1984 struct usb_mixer_elem_info *cval = kctl->private_data;
1985 num_ins = cval->max;
1986 kfree(cval);
1987 kctl->private_data = NULL;
1988 }
1989 if (kctl->private_value) {
1990 char **itemlist = (char **)kctl->private_value;
1991 for (i = 0; i < num_ins; i++)
1992 kfree(itemlist[i]);
1993 kfree(itemlist);
1994 kctl->private_value = 0;
1995 }
1996 }
1997
1998 /*
1999 * parse a selector unit
2000 */
2001 static int parse_audio_selector_unit(struct mixer_build *state, int unitid,
2002 void *raw_desc)
2003 {
2004 struct uac_selector_unit_descriptor *desc = raw_desc;
2005 unsigned int i, nameid, len;
2006 int err;
2007 struct usb_mixer_elem_info *cval;
2008 struct snd_kcontrol *kctl;
2009 const struct usbmix_name_map *map;
2010 char **namelist;
2011
2012 if (!desc->bNrInPins || desc->bLength < 5 + desc->bNrInPins) {
2013 usb_audio_err(state->chip,
2014 "invalid SELECTOR UNIT descriptor %d\n", unitid);
2015 return -EINVAL;
2016 }
2017
2018 for (i = 0; i < desc->bNrInPins; i++) {
2019 if ((err = parse_audio_unit(state, desc->baSourceID[i])) < 0)
2020 return err;
2021 }
2022
2023 if (desc->bNrInPins == 1) /* only one ? nonsense! */
2024 return 0;
2025
2026 map = find_map(state, unitid, 0);
2027 if (check_ignored_ctl(map))
2028 return 0;
2029
2030 cval = kzalloc(sizeof(*cval), GFP_KERNEL);
2031 if (!cval)
2032 return -ENOMEM;
2033 snd_usb_mixer_elem_init_std(&cval->head, state->mixer, unitid);
2034 cval->val_type = USB_MIXER_U8;
2035 cval->channels = 1;
2036 cval->min = 1;
2037 cval->max = desc->bNrInPins;
2038 cval->res = 1;
2039 cval->initialized = 1;
2040
2041 if (state->mixer->protocol == UAC_VERSION_1)
2042 cval->control = 0;
2043 else /* UAC_VERSION_2 */
2044 cval->control = (desc->bDescriptorSubtype == UAC2_CLOCK_SELECTOR) ?
2045 UAC2_CX_CLOCK_SELECTOR : UAC2_SU_SELECTOR;
2046
2047 namelist = kmalloc(sizeof(char *) * desc->bNrInPins, GFP_KERNEL);
2048 if (!namelist) {
2049 kfree(cval);
2050 return -ENOMEM;
2051 }
2052 #define MAX_ITEM_NAME_LEN 64
2053 for (i = 0; i < desc->bNrInPins; i++) {
2054 struct usb_audio_term iterm;
2055 len = 0;
2056 namelist[i] = kmalloc(MAX_ITEM_NAME_LEN, GFP_KERNEL);
2057 if (!namelist[i]) {
2058 while (i--)
2059 kfree(namelist[i]);
2060 kfree(namelist);
2061 kfree(cval);
2062 return -ENOMEM;
2063 }
2064 len = check_mapped_selector_name(state, unitid, i, namelist[i],
2065 MAX_ITEM_NAME_LEN);
2066 if (! len && check_input_term(state, desc->baSourceID[i], &iterm) >= 0)
2067 len = get_term_name(state, &iterm, namelist[i], MAX_ITEM_NAME_LEN, 0);
2068 if (! len)
2069 sprintf(namelist[i], "Input %u", i);
2070 }
2071
2072 kctl = snd_ctl_new1(&mixer_selectunit_ctl, cval);
2073 if (! kctl) {
2074 usb_audio_err(state->chip, "cannot malloc kcontrol\n");
2075 kfree(namelist);
2076 kfree(cval);
2077 return -ENOMEM;
2078 }
2079 kctl->private_value = (unsigned long)namelist;
2080 kctl->private_free = usb_mixer_selector_elem_free;
2081
2082 nameid = uac_selector_unit_iSelector(desc);
2083 len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name));
2084 if (len)
2085 ;
2086 else if (nameid)
2087 snd_usb_copy_string_desc(state, nameid, kctl->id.name,
2088 sizeof(kctl->id.name));
2089 else {
2090 len = get_term_name(state, &state->oterm,
2091 kctl->id.name, sizeof(kctl->id.name), 0);
2092 if (!len)
2093 strlcpy(kctl->id.name, "USB", sizeof(kctl->id.name));
2094
2095 if (desc->bDescriptorSubtype == UAC2_CLOCK_SELECTOR)
2096 append_ctl_name(kctl, " Clock Source");
2097 else if ((state->oterm.type & 0xff00) == 0x0100)
2098 append_ctl_name(kctl, " Capture Source");
2099 else
2100 append_ctl_name(kctl, " Playback Source");
2101 }
2102
2103 usb_audio_dbg(state->chip, "[%d] SU [%s] items = %d\n",
2104 cval->head.id, kctl->id.name, desc->bNrInPins);
2105 return snd_usb_mixer_add_control(&cval->head, kctl);
2106 }
2107
2108 /*
2109 * parse an audio unit recursively
2110 */
2111
2112 static int parse_audio_unit(struct mixer_build *state, int unitid)
2113 {
2114 unsigned char *p1;
2115
2116 if (test_and_set_bit(unitid, state->unitbitmap))
2117 return 0; /* the unit already visited */
2118
2119 p1 = find_audio_control_unit(state, unitid);
2120 if (!p1) {
2121 usb_audio_err(state->chip, "unit %d not found!\n", unitid);
2122 return -EINVAL;
2123 }
2124
2125 switch (p1[2]) {
2126 case UAC_INPUT_TERMINAL:
2127 case UAC2_CLOCK_SOURCE:
2128 return 0; /* NOP */
2129 case UAC_MIXER_UNIT:
2130 return parse_audio_mixer_unit(state, unitid, p1);
2131 case UAC_SELECTOR_UNIT:
2132 case UAC2_CLOCK_SELECTOR:
2133 return parse_audio_selector_unit(state, unitid, p1);
2134 case UAC_FEATURE_UNIT:
2135 return parse_audio_feature_unit(state, unitid, p1);
2136 case UAC1_PROCESSING_UNIT:
2137 /* UAC2_EFFECT_UNIT has the same value */
2138 if (state->mixer->protocol == UAC_VERSION_1)
2139 return parse_audio_processing_unit(state, unitid, p1);
2140 else
2141 return 0; /* FIXME - effect units not implemented yet */
2142 case UAC1_EXTENSION_UNIT:
2143 /* UAC2_PROCESSING_UNIT_V2 has the same value */
2144 if (state->mixer->protocol == UAC_VERSION_1)
2145 return parse_audio_extension_unit(state, unitid, p1);
2146 else /* UAC_VERSION_2 */
2147 return parse_audio_processing_unit(state, unitid, p1);
2148 case UAC2_EXTENSION_UNIT_V2:
2149 return parse_audio_extension_unit(state, unitid, p1);
2150 default:
2151 usb_audio_err(state->chip,
2152 "unit %u: unexpected type 0x%02x\n", unitid, p1[2]);
2153 return -EINVAL;
2154 }
2155 }
2156
2157 static void snd_usb_mixer_free(struct usb_mixer_interface *mixer)
2158 {
2159 kfree(mixer->id_elems);
2160 if (mixer->urb) {
2161 kfree(mixer->urb->transfer_buffer);
2162 usb_free_urb(mixer->urb);
2163 }
2164 usb_free_urb(mixer->rc_urb);
2165 kfree(mixer->rc_setup_packet);
2166 kfree(mixer);
2167 }
2168
2169 static int snd_usb_mixer_dev_free(struct snd_device *device)
2170 {
2171 struct usb_mixer_interface *mixer = device->device_data;
2172 snd_usb_mixer_free(mixer);
2173 return 0;
2174 }
2175
2176 /*
2177 * create mixer controls
2178 *
2179 * walk through all UAC_OUTPUT_TERMINAL descriptors to search for mixers
2180 */
2181 static int snd_usb_mixer_controls(struct usb_mixer_interface *mixer)
2182 {
2183 struct mixer_build state;
2184 int err;
2185 const struct usbmix_ctl_map *map;
2186 void *p;
2187
2188 memset(&state, 0, sizeof(state));
2189 state.chip = mixer->chip;
2190 state.mixer = mixer;
2191 state.buffer = mixer->hostif->extra;
2192 state.buflen = mixer->hostif->extralen;
2193
2194 /* check the mapping table */
2195 for (map = usbmix_ctl_maps; map->id; map++) {
2196 if (map->id == state.chip->usb_id) {
2197 state.map = map->map;
2198 state.selector_map = map->selector_map;
2199 mixer->ignore_ctl_error = map->ignore_ctl_error;
2200 break;
2201 }
2202 }
2203
2204 p = NULL;
2205 while ((p = snd_usb_find_csint_desc(mixer->hostif->extra,
2206 mixer->hostif->extralen,
2207 p, UAC_OUTPUT_TERMINAL)) != NULL) {
2208 if (mixer->protocol == UAC_VERSION_1) {
2209 struct uac1_output_terminal_descriptor *desc = p;
2210
2211 if (desc->bLength < sizeof(*desc))
2212 continue; /* invalid descriptor? */
2213 /* mark terminal ID as visited */
2214 set_bit(desc->bTerminalID, state.unitbitmap);
2215 state.oterm.id = desc->bTerminalID;
2216 state.oterm.type = le16_to_cpu(desc->wTerminalType);
2217 state.oterm.name = desc->iTerminal;
2218 err = parse_audio_unit(&state, desc->bSourceID);
2219 if (err < 0 && err != -EINVAL)
2220 return err;
2221 } else { /* UAC_VERSION_2 */
2222 struct uac2_output_terminal_descriptor *desc = p;
2223
2224 if (desc->bLength < sizeof(*desc))
2225 continue; /* invalid descriptor? */
2226 /* mark terminal ID as visited */
2227 set_bit(desc->bTerminalID, state.unitbitmap);
2228 state.oterm.id = desc->bTerminalID;
2229 state.oterm.type = le16_to_cpu(desc->wTerminalType);
2230 state.oterm.name = desc->iTerminal;
2231 err = parse_audio_unit(&state, desc->bSourceID);
2232 if (err < 0 && err != -EINVAL)
2233 return err;
2234
2235 /*
2236 * For UAC2, use the same approach to also add the
2237 * clock selectors
2238 */
2239 err = parse_audio_unit(&state, desc->bCSourceID);
2240 if (err < 0 && err != -EINVAL)
2241 return err;
2242 }
2243 }
2244
2245 return 0;
2246 }
2247
2248 void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer, int unitid)
2249 {
2250 struct usb_mixer_elem_list *list;
2251
2252 for (list = mixer->id_elems[unitid]; list; list = list->next_id_elem)
2253 snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
2254 &list->kctl->id);
2255 }
2256
2257 static void snd_usb_mixer_dump_cval(struct snd_info_buffer *buffer,
2258 struct usb_mixer_elem_list *list)
2259 {
2260 struct usb_mixer_elem_info *cval = (struct usb_mixer_elem_info *)list;
2261 static char *val_types[] = {"BOOLEAN", "INV_BOOLEAN",
2262 "S8", "U8", "S16", "U16"};
2263 snd_iprintf(buffer, " Info: id=%i, control=%i, cmask=0x%x, "
2264 "channels=%i, type=\"%s\"\n", cval->head.id,
2265 cval->control, cval->cmask, cval->channels,
2266 val_types[cval->val_type]);
2267 snd_iprintf(buffer, " Volume: min=%i, max=%i, dBmin=%i, dBmax=%i\n",
2268 cval->min, cval->max, cval->dBmin, cval->dBmax);
2269 }
2270
2271 static void snd_usb_mixer_proc_read(struct snd_info_entry *entry,
2272 struct snd_info_buffer *buffer)
2273 {
2274 struct snd_usb_audio *chip = entry->private_data;
2275 struct usb_mixer_interface *mixer;
2276 struct usb_mixer_elem_list *list;
2277 int unitid;
2278
2279 list_for_each_entry(mixer, &chip->mixer_list, list) {
2280 snd_iprintf(buffer,
2281 "USB Mixer: usb_id=0x%08x, ctrlif=%i, ctlerr=%i\n",
2282 chip->usb_id, snd_usb_ctrl_intf(chip),
2283 mixer->ignore_ctl_error);
2284 snd_iprintf(buffer, "Card: %s\n", chip->card->longname);
2285 for (unitid = 0; unitid < MAX_ID_ELEMS; unitid++) {
2286 for (list = mixer->id_elems[unitid]; list;
2287 list = list->next_id_elem) {
2288 snd_iprintf(buffer, " Unit: %i\n", list->id);
2289 if (list->kctl)
2290 snd_iprintf(buffer,
2291 " Control: name=\"%s\", index=%i\n",
2292 list->kctl->id.name,
2293 list->kctl->id.index);
2294 if (list->dump)
2295 list->dump(buffer, list);
2296 }
2297 }
2298 }
2299 }
2300
2301 static void snd_usb_mixer_interrupt_v2(struct usb_mixer_interface *mixer,
2302 int attribute, int value, int index)
2303 {
2304 struct usb_mixer_elem_list *list;
2305 __u8 unitid = (index >> 8) & 0xff;
2306 __u8 control = (value >> 8) & 0xff;
2307 __u8 channel = value & 0xff;
2308
2309 if (channel >= MAX_CHANNELS) {
2310 usb_audio_dbg(mixer->chip,
2311 "%s(): bogus channel number %d\n",
2312 __func__, channel);
2313 return;
2314 }
2315
2316 for (list = mixer->id_elems[unitid]; list; list = list->next_id_elem) {
2317 struct usb_mixer_elem_info *info;
2318
2319 if (!list->kctl)
2320 continue;
2321
2322 info = (struct usb_mixer_elem_info *)list;
2323 if (info->control != control)
2324 continue;
2325
2326 switch (attribute) {
2327 case UAC2_CS_CUR:
2328 /* invalidate cache, so the value is read from the device */
2329 if (channel)
2330 info->cached &= ~(1 << channel);
2331 else /* master channel */
2332 info->cached = 0;
2333
2334 snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
2335 &info->head.kctl->id);
2336 break;
2337
2338 case UAC2_CS_RANGE:
2339 /* TODO */
2340 break;
2341
2342 case UAC2_CS_MEM:
2343 /* TODO */
2344 break;
2345
2346 default:
2347 usb_audio_dbg(mixer->chip,
2348 "unknown attribute %d in interrupt\n",
2349 attribute);
2350 break;
2351 } /* switch */
2352 }
2353 }
2354
2355 static void snd_usb_mixer_interrupt(struct urb *urb)
2356 {
2357 struct usb_mixer_interface *mixer = urb->context;
2358 int len = urb->actual_length;
2359 int ustatus = urb->status;
2360
2361 if (ustatus != 0)
2362 goto requeue;
2363
2364 if (mixer->protocol == UAC_VERSION_1) {
2365 struct uac1_status_word *status;
2366
2367 for (status = urb->transfer_buffer;
2368 len >= sizeof(*status);
2369 len -= sizeof(*status), status++) {
2370 dev_dbg(&urb->dev->dev, "status interrupt: %02x %02x\n",
2371 status->bStatusType,
2372 status->bOriginator);
2373
2374 /* ignore any notifications not from the control interface */
2375 if ((status->bStatusType & UAC1_STATUS_TYPE_ORIG_MASK) !=
2376 UAC1_STATUS_TYPE_ORIG_AUDIO_CONTROL_IF)
2377 continue;
2378
2379 if (status->bStatusType & UAC1_STATUS_TYPE_MEM_CHANGED)
2380 snd_usb_mixer_rc_memory_change(mixer, status->bOriginator);
2381 else
2382 snd_usb_mixer_notify_id(mixer, status->bOriginator);
2383 }
2384 } else { /* UAC_VERSION_2 */
2385 struct uac2_interrupt_data_msg *msg;
2386
2387 for (msg = urb->transfer_buffer;
2388 len >= sizeof(*msg);
2389 len -= sizeof(*msg), msg++) {
2390 /* drop vendor specific and endpoint requests */
2391 if ((msg->bInfo & UAC2_INTERRUPT_DATA_MSG_VENDOR) ||
2392 (msg->bInfo & UAC2_INTERRUPT_DATA_MSG_EP))
2393 continue;
2394
2395 snd_usb_mixer_interrupt_v2(mixer, msg->bAttribute,
2396 le16_to_cpu(msg->wValue),
2397 le16_to_cpu(msg->wIndex));
2398 }
2399 }
2400
2401 requeue:
2402 if (ustatus != -ENOENT &&
2403 ustatus != -ECONNRESET &&
2404 ustatus != -ESHUTDOWN) {
2405 urb->dev = mixer->chip->dev;
2406 usb_submit_urb(urb, GFP_ATOMIC);
2407 }
2408 }
2409
2410 /* create the handler for the optional status interrupt endpoint */
2411 static int snd_usb_mixer_status_create(struct usb_mixer_interface *mixer)
2412 {
2413 struct usb_endpoint_descriptor *ep;
2414 void *transfer_buffer;
2415 int buffer_length;
2416 unsigned int epnum;
2417
2418 /* we need one interrupt input endpoint */
2419 if (get_iface_desc(mixer->hostif)->bNumEndpoints < 1)
2420 return 0;
2421 ep = get_endpoint(mixer->hostif, 0);
2422 if (!usb_endpoint_dir_in(ep) || !usb_endpoint_xfer_int(ep))
2423 return 0;
2424
2425 epnum = usb_endpoint_num(ep);
2426 buffer_length = le16_to_cpu(ep->wMaxPacketSize);
2427 transfer_buffer = kmalloc(buffer_length, GFP_KERNEL);
2428 if (!transfer_buffer)
2429 return -ENOMEM;
2430 mixer->urb = usb_alloc_urb(0, GFP_KERNEL);
2431 if (!mixer->urb) {
2432 kfree(transfer_buffer);
2433 return -ENOMEM;
2434 }
2435 usb_fill_int_urb(mixer->urb, mixer->chip->dev,
2436 usb_rcvintpipe(mixer->chip->dev, epnum),
2437 transfer_buffer, buffer_length,
2438 snd_usb_mixer_interrupt, mixer, ep->bInterval);
2439 usb_submit_urb(mixer->urb, GFP_KERNEL);
2440 return 0;
2441 }
2442
2443 int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif,
2444 int ignore_error)
2445 {
2446 static struct snd_device_ops dev_ops = {
2447 .dev_free = snd_usb_mixer_dev_free
2448 };
2449 struct usb_mixer_interface *mixer;
2450 struct snd_info_entry *entry;
2451 int err;
2452
2453 strcpy(chip->card->mixername, "USB Mixer");
2454
2455 mixer = kzalloc(sizeof(*mixer), GFP_KERNEL);
2456 if (!mixer)
2457 return -ENOMEM;
2458 mixer->chip = chip;
2459 mixer->ignore_ctl_error = ignore_error;
2460 mixer->id_elems = kcalloc(MAX_ID_ELEMS, sizeof(*mixer->id_elems),
2461 GFP_KERNEL);
2462 if (!mixer->id_elems) {
2463 kfree(mixer);
2464 return -ENOMEM;
2465 }
2466
2467 mixer->hostif = &usb_ifnum_to_if(chip->dev, ctrlif)->altsetting[0];
2468 switch (get_iface_desc(mixer->hostif)->bInterfaceProtocol) {
2469 case UAC_VERSION_1:
2470 default:
2471 mixer->protocol = UAC_VERSION_1;
2472 break;
2473 case UAC_VERSION_2:
2474 mixer->protocol = UAC_VERSION_2;
2475 break;
2476 }
2477
2478 if ((err = snd_usb_mixer_controls(mixer)) < 0 ||
2479 (err = snd_usb_mixer_status_create(mixer)) < 0)
2480 goto _error;
2481
2482 snd_usb_mixer_apply_create_quirk(mixer);
2483
2484 err = snd_device_new(chip->card, SNDRV_DEV_CODEC, mixer, &dev_ops);
2485 if (err < 0)
2486 goto _error;
2487
2488 if (list_empty(&chip->mixer_list) &&
2489 !snd_card_proc_new(chip->card, "usbmixer", &entry))
2490 snd_info_set_text_ops(entry, chip, snd_usb_mixer_proc_read);
2491
2492 list_add(&mixer->list, &chip->mixer_list);
2493 return 0;
2494
2495 _error:
2496 snd_usb_mixer_free(mixer);
2497 return err;
2498 }
2499
2500 void snd_usb_mixer_disconnect(struct usb_mixer_interface *mixer)
2501 {
2502 usb_kill_urb(mixer->urb);
2503 usb_kill_urb(mixer->rc_urb);
2504 }
2505
2506 #ifdef CONFIG_PM
2507 /* stop any bus activity of a mixer */
2508 static void snd_usb_mixer_inactivate(struct usb_mixer_interface *mixer)
2509 {
2510 usb_kill_urb(mixer->urb);
2511 usb_kill_urb(mixer->rc_urb);
2512 }
2513
2514 static int snd_usb_mixer_activate(struct usb_mixer_interface *mixer)
2515 {
2516 int err;
2517
2518 if (mixer->urb) {
2519 err = usb_submit_urb(mixer->urb, GFP_NOIO);
2520 if (err < 0)
2521 return err;
2522 }
2523
2524 return 0;
2525 }
2526
2527 int snd_usb_mixer_suspend(struct usb_mixer_interface *mixer)
2528 {
2529 snd_usb_mixer_inactivate(mixer);
2530 return 0;
2531 }
2532
2533 static int restore_mixer_value(struct usb_mixer_elem_list *list)
2534 {
2535 struct usb_mixer_elem_info *cval = (struct usb_mixer_elem_info *)list;
2536 int c, err, idx;
2537
2538 if (cval->cmask) {
2539 idx = 0;
2540 for (c = 0; c < MAX_CHANNELS; c++) {
2541 if (!(cval->cmask & (1 << c)))
2542 continue;
2543 if (cval->cached & (1 << (c + 1))) {
2544 err = snd_usb_set_cur_mix_value(cval, c + 1, idx,
2545 cval->cache_val[idx]);
2546 if (err < 0)
2547 return err;
2548 }
2549 idx++;
2550 }
2551 } else {
2552 /* master */
2553 if (cval->cached) {
2554 err = snd_usb_set_cur_mix_value(cval, 0, 0, *cval->cache_val);
2555 if (err < 0)
2556 return err;
2557 }
2558 }
2559
2560 return 0;
2561 }
2562
2563 int snd_usb_mixer_resume(struct usb_mixer_interface *mixer, bool reset_resume)
2564 {
2565 struct usb_mixer_elem_list *list;
2566 int id, err;
2567
2568 if (reset_resume) {
2569 /* restore cached mixer values */
2570 for (id = 0; id < MAX_ID_ELEMS; id++) {
2571 for (list = mixer->id_elems[id]; list;
2572 list = list->next_id_elem) {
2573 if (list->resume) {
2574 err = list->resume(list);
2575 if (err < 0)
2576 return err;
2577 }
2578 }
2579 }
2580 }
2581
2582 return snd_usb_mixer_activate(mixer);
2583 }
2584 #endif
2585
2586 void snd_usb_mixer_elem_init_std(struct usb_mixer_elem_list *list,
2587 struct usb_mixer_interface *mixer,
2588 int unitid)
2589 {
2590 list->mixer = mixer;
2591 list->id = unitid;
2592 list->dump = snd_usb_mixer_dump_cval;
2593 #ifdef CONFIG_PM
2594 list->resume = restore_mixer_value;
2595 #endif
2596 }
Linux kernel - Deliverables
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