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Merge tag 'at91-dt-for-3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/mripard...
[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 /* check whether the control should be ignored */
140 static inline int
141 check_ignored_ctl(const struct usbmix_name_map *p)
142 {
143 if (!p || p->name || p->dB)
144 return 0;
145 return 1;
146 }
147
148 /* dB mapping */
149 static inline void check_mapped_dB(const struct usbmix_name_map *p,
150 struct usb_mixer_elem_info *cval)
151 {
152 if (p && p->dB) {
153 cval->dBmin = p->dB->min;
154 cval->dBmax = p->dB->max;
155 cval->initialized = 1;
156 }
157 }
158
159 /* get the mapped selector source name */
160 static int check_mapped_selector_name(struct mixer_build *state, int unitid,
161 int index, char *buf, int buflen)
162 {
163 const struct usbmix_selector_map *p;
164
165 if (!state->selector_map)
166 return 0;
167 for (p = state->selector_map; p->id; p++) {
168 if (p->id == unitid && index < p->count)
169 return strlcpy(buf, p->names[index], buflen);
170 }
171 return 0;
172 }
173
174 /*
175 * find an audio control unit with the given unit id
176 */
177 static void *find_audio_control_unit(struct mixer_build *state,
178 unsigned char unit)
179 {
180 /* we just parse the header */
181 struct uac_feature_unit_descriptor *hdr = NULL;
182
183 while ((hdr = snd_usb_find_desc(state->buffer, state->buflen, hdr,
184 USB_DT_CS_INTERFACE)) != NULL) {
185 if (hdr->bLength >= 4 &&
186 hdr->bDescriptorSubtype >= UAC_INPUT_TERMINAL &&
187 hdr->bDescriptorSubtype <= UAC2_SAMPLE_RATE_CONVERTER &&
188 hdr->bUnitID == unit)
189 return hdr;
190 }
191
192 return NULL;
193 }
194
195 /*
196 * copy a string with the given id
197 */
198 static int snd_usb_copy_string_desc(struct mixer_build *state,
199 int index, char *buf, int maxlen)
200 {
201 int len = usb_string(state->chip->dev, index, buf, maxlen - 1);
202 buf[len] = 0;
203 return len;
204 }
205
206 /*
207 * convert from the byte/word on usb descriptor to the zero-based integer
208 */
209 static int convert_signed_value(struct usb_mixer_elem_info *cval, int val)
210 {
211 switch (cval->val_type) {
212 case USB_MIXER_BOOLEAN:
213 return !!val;
214 case USB_MIXER_INV_BOOLEAN:
215 return !val;
216 case USB_MIXER_U8:
217 val &= 0xff;
218 break;
219 case USB_MIXER_S8:
220 val &= 0xff;
221 if (val >= 0x80)
222 val -= 0x100;
223 break;
224 case USB_MIXER_U16:
225 val &= 0xffff;
226 break;
227 case USB_MIXER_S16:
228 val &= 0xffff;
229 if (val >= 0x8000)
230 val -= 0x10000;
231 break;
232 }
233 return val;
234 }
235
236 /*
237 * convert from the zero-based int to the byte/word for usb descriptor
238 */
239 static int convert_bytes_value(struct usb_mixer_elem_info *cval, int val)
240 {
241 switch (cval->val_type) {
242 case USB_MIXER_BOOLEAN:
243 return !!val;
244 case USB_MIXER_INV_BOOLEAN:
245 return !val;
246 case USB_MIXER_S8:
247 case USB_MIXER_U8:
248 return val & 0xff;
249 case USB_MIXER_S16:
250 case USB_MIXER_U16:
251 return val & 0xffff;
252 }
253 return 0; /* not reached */
254 }
255
256 static int get_relative_value(struct usb_mixer_elem_info *cval, int val)
257 {
258 if (!cval->res)
259 cval->res = 1;
260 if (val < cval->min)
261 return 0;
262 else if (val >= cval->max)
263 return (cval->max - cval->min + cval->res - 1) / cval->res;
264 else
265 return (val - cval->min) / cval->res;
266 }
267
268 static int get_abs_value(struct usb_mixer_elem_info *cval, int val)
269 {
270 if (val < 0)
271 return cval->min;
272 if (!cval->res)
273 cval->res = 1;
274 val *= cval->res;
275 val += cval->min;
276 if (val > cval->max)
277 return cval->max;
278 return val;
279 }
280
281
282 /*
283 * retrieve a mixer value
284 */
285
286 static int get_ctl_value_v1(struct usb_mixer_elem_info *cval, int request,
287 int validx, int *value_ret)
288 {
289 struct snd_usb_audio *chip = cval->mixer->chip;
290 unsigned char buf[2];
291 int val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1;
292 int timeout = 10;
293 int idx = 0, err;
294
295 err = snd_usb_autoresume(cval->mixer->chip);
296 if (err < 0)
297 return -EIO;
298
299 down_read(&chip->shutdown_rwsem);
300 while (timeout-- > 0) {
301 if (chip->shutdown)
302 break;
303 idx = snd_usb_ctrl_intf(chip) | (cval->id << 8);
304 if (snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), request,
305 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
306 validx, idx, buf, val_len) >= val_len) {
307 *value_ret = convert_signed_value(cval, snd_usb_combine_bytes(buf, val_len));
308 err = 0;
309 goto out;
310 }
311 }
312 usb_audio_dbg(chip,
313 "cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n",
314 request, validx, idx, cval->val_type);
315 err = -EINVAL;
316
317 out:
318 up_read(&chip->shutdown_rwsem);
319 snd_usb_autosuspend(cval->mixer->chip);
320 return err;
321 }
322
323 static int get_ctl_value_v2(struct usb_mixer_elem_info *cval, int request,
324 int validx, int *value_ret)
325 {
326 struct snd_usb_audio *chip = cval->mixer->chip;
327 unsigned char buf[2 + 3 * sizeof(__u16)]; /* enough space for one range */
328 unsigned char *val;
329 int idx = 0, ret, size;
330 __u8 bRequest;
331
332 if (request == UAC_GET_CUR) {
333 bRequest = UAC2_CS_CUR;
334 size = sizeof(__u16);
335 } else {
336 bRequest = UAC2_CS_RANGE;
337 size = sizeof(buf);
338 }
339
340 memset(buf, 0, sizeof(buf));
341
342 ret = snd_usb_autoresume(chip) ? -EIO : 0;
343 if (ret)
344 goto error;
345
346 down_read(&chip->shutdown_rwsem);
347 if (chip->shutdown) {
348 ret = -ENODEV;
349 } else {
350 idx = snd_usb_ctrl_intf(chip) | (cval->id << 8);
351 ret = snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), bRequest,
352 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
353 validx, idx, buf, size);
354 }
355 up_read(&chip->shutdown_rwsem);
356 snd_usb_autosuspend(chip);
357
358 if (ret < 0) {
359 error:
360 usb_audio_err(chip,
361 "cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n",
362 request, validx, idx, cval->val_type);
363 return ret;
364 }
365
366 /* FIXME: how should we handle multiple triplets here? */
367
368 switch (request) {
369 case UAC_GET_CUR:
370 val = buf;
371 break;
372 case UAC_GET_MIN:
373 val = buf + sizeof(__u16);
374 break;
375 case UAC_GET_MAX:
376 val = buf + sizeof(__u16) * 2;
377 break;
378 case UAC_GET_RES:
379 val = buf + sizeof(__u16) * 3;
380 break;
381 default:
382 return -EINVAL;
383 }
384
385 *value_ret = convert_signed_value(cval, snd_usb_combine_bytes(val, sizeof(__u16)));
386
387 return 0;
388 }
389
390 static int get_ctl_value(struct usb_mixer_elem_info *cval, int request,
391 int validx, int *value_ret)
392 {
393 validx += cval->idx_off;
394
395 return (cval->mixer->protocol == UAC_VERSION_1) ?
396 get_ctl_value_v1(cval, request, validx, value_ret) :
397 get_ctl_value_v2(cval, request, validx, value_ret);
398 }
399
400 static int get_cur_ctl_value(struct usb_mixer_elem_info *cval,
401 int validx, int *value)
402 {
403 return get_ctl_value(cval, UAC_GET_CUR, validx, value);
404 }
405
406 /* channel = 0: master, 1 = first channel */
407 static inline int get_cur_mix_raw(struct usb_mixer_elem_info *cval,
408 int channel, int *value)
409 {
410 return get_ctl_value(cval, UAC_GET_CUR,
411 (cval->control << 8) | channel,
412 value);
413 }
414
415 static int get_cur_mix_value(struct usb_mixer_elem_info *cval,
416 int channel, int index, int *value)
417 {
418 int err;
419
420 if (cval->cached & (1 << channel)) {
421 *value = cval->cache_val[index];
422 return 0;
423 }
424 err = get_cur_mix_raw(cval, channel, value);
425 if (err < 0) {
426 if (!cval->mixer->ignore_ctl_error)
427 usb_audio_dbg(cval->mixer->chip,
428 "cannot get current value for control %d ch %d: err = %d\n",
429 cval->control, channel, err);
430 return err;
431 }
432 cval->cached |= 1 << channel;
433 cval->cache_val[index] = *value;
434 return 0;
435 }
436
437 /*
438 * set a mixer value
439 */
440
441 int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval,
442 int request, int validx, int value_set)
443 {
444 struct snd_usb_audio *chip = cval->mixer->chip;
445 unsigned char buf[2];
446 int idx = 0, val_len, err, timeout = 10;
447
448 validx += cval->idx_off;
449
450 if (cval->mixer->protocol == UAC_VERSION_1) {
451 val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1;
452 } else { /* UAC_VERSION_2 */
453 /* audio class v2 controls are always 2 bytes in size */
454 val_len = sizeof(__u16);
455
456 /* FIXME */
457 if (request != UAC_SET_CUR) {
458 usb_audio_dbg(chip, "RANGE setting not yet supported\n");
459 return -EINVAL;
460 }
461
462 request = UAC2_CS_CUR;
463 }
464
465 value_set = convert_bytes_value(cval, value_set);
466 buf[0] = value_set & 0xff;
467 buf[1] = (value_set >> 8) & 0xff;
468 err = snd_usb_autoresume(chip);
469 if (err < 0)
470 return -EIO;
471 down_read(&chip->shutdown_rwsem);
472 while (timeout-- > 0) {
473 if (chip->shutdown)
474 break;
475 idx = snd_usb_ctrl_intf(chip) | (cval->id << 8);
476 if (snd_usb_ctl_msg(chip->dev,
477 usb_sndctrlpipe(chip->dev, 0), request,
478 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
479 validx, idx, buf, val_len) >= 0) {
480 err = 0;
481 goto out;
482 }
483 }
484 usb_audio_dbg(chip, "cannot set ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d, data = %#x/%#x\n",
485 request, validx, idx, cval->val_type, buf[0], buf[1]);
486 err = -EINVAL;
487
488 out:
489 up_read(&chip->shutdown_rwsem);
490 snd_usb_autosuspend(chip);
491 return err;
492 }
493
494 static int set_cur_ctl_value(struct usb_mixer_elem_info *cval,
495 int validx, int value)
496 {
497 return snd_usb_mixer_set_ctl_value(cval, UAC_SET_CUR, validx, value);
498 }
499
500 static int set_cur_mix_value(struct usb_mixer_elem_info *cval, int channel,
501 int index, int value)
502 {
503 int err;
504 unsigned int read_only = (channel == 0) ?
505 cval->master_readonly :
506 cval->ch_readonly & (1 << (channel - 1));
507
508 if (read_only) {
509 usb_audio_dbg(cval->mixer->chip,
510 "%s(): channel %d of control %d is read_only\n",
511 __func__, channel, cval->control);
512 return 0;
513 }
514
515 err = snd_usb_mixer_set_ctl_value(cval,
516 UAC_SET_CUR, (cval->control << 8) | channel,
517 value);
518 if (err < 0)
519 return err;
520 cval->cached |= 1 << channel;
521 cval->cache_val[index] = value;
522 return 0;
523 }
524
525 /*
526 * TLV callback for mixer volume controls
527 */
528 int snd_usb_mixer_vol_tlv(struct snd_kcontrol *kcontrol, int op_flag,
529 unsigned int size, unsigned int __user *_tlv)
530 {
531 struct usb_mixer_elem_info *cval = kcontrol->private_data;
532 DECLARE_TLV_DB_MINMAX(scale, 0, 0);
533
534 if (size < sizeof(scale))
535 return -ENOMEM;
536 scale[2] = cval->dBmin;
537 scale[3] = cval->dBmax;
538 if (copy_to_user(_tlv, scale, sizeof(scale)))
539 return -EFAULT;
540 return 0;
541 }
542
543 /*
544 * parser routines begin here...
545 */
546
547 static int parse_audio_unit(struct mixer_build *state, int unitid);
548
549
550 /*
551 * check if the input/output channel routing is enabled on the given bitmap.
552 * used for mixer unit parser
553 */
554 static int check_matrix_bitmap(unsigned char *bmap,
555 int ich, int och, int num_outs)
556 {
557 int idx = ich * num_outs + och;
558 return bmap[idx >> 3] & (0x80 >> (idx & 7));
559 }
560
561 /*
562 * add an alsa control element
563 * search and increment the index until an empty slot is found.
564 *
565 * if failed, give up and free the control instance.
566 */
567
568 int snd_usb_mixer_add_control(struct usb_mixer_interface *mixer,
569 struct snd_kcontrol *kctl)
570 {
571 struct usb_mixer_elem_info *cval = kctl->private_data;
572 int err;
573
574 while (snd_ctl_find_id(mixer->chip->card, &kctl->id))
575 kctl->id.index++;
576 if ((err = snd_ctl_add(mixer->chip->card, kctl)) < 0) {
577 usb_audio_dbg(mixer->chip, "cannot add control (err = %d)\n",
578 err);
579 return err;
580 }
581 cval->elem_id = &kctl->id;
582 cval->next_id_elem = mixer->id_elems[cval->id];
583 mixer->id_elems[cval->id] = cval;
584 return 0;
585 }
586
587 /*
588 * get a terminal name string
589 */
590
591 static struct iterm_name_combo {
592 int type;
593 char *name;
594 } iterm_names[] = {
595 { 0x0300, "Output" },
596 { 0x0301, "Speaker" },
597 { 0x0302, "Headphone" },
598 { 0x0303, "HMD Audio" },
599 { 0x0304, "Desktop Speaker" },
600 { 0x0305, "Room Speaker" },
601 { 0x0306, "Com Speaker" },
602 { 0x0307, "LFE" },
603 { 0x0600, "External In" },
604 { 0x0601, "Analog In" },
605 { 0x0602, "Digital In" },
606 { 0x0603, "Line" },
607 { 0x0604, "Legacy In" },
608 { 0x0605, "IEC958 In" },
609 { 0x0606, "1394 DA Stream" },
610 { 0x0607, "1394 DV Stream" },
611 { 0x0700, "Embedded" },
612 { 0x0701, "Noise Source" },
613 { 0x0702, "Equalization Noise" },
614 { 0x0703, "CD" },
615 { 0x0704, "DAT" },
616 { 0x0705, "DCC" },
617 { 0x0706, "MiniDisk" },
618 { 0x0707, "Analog Tape" },
619 { 0x0708, "Phonograph" },
620 { 0x0709, "VCR Audio" },
621 { 0x070a, "Video Disk Audio" },
622 { 0x070b, "DVD Audio" },
623 { 0x070c, "TV Tuner Audio" },
624 { 0x070d, "Satellite Rec Audio" },
625 { 0x070e, "Cable Tuner Audio" },
626 { 0x070f, "DSS Audio" },
627 { 0x0710, "Radio Receiver" },
628 { 0x0711, "Radio Transmitter" },
629 { 0x0712, "Multi-Track Recorder" },
630 { 0x0713, "Synthesizer" },
631 { 0 },
632 };
633
634 static int get_term_name(struct mixer_build *state, struct usb_audio_term *iterm,
635 unsigned char *name, int maxlen, int term_only)
636 {
637 struct iterm_name_combo *names;
638
639 if (iterm->name)
640 return snd_usb_copy_string_desc(state, iterm->name,
641 name, maxlen);
642
643 /* virtual type - not a real terminal */
644 if (iterm->type >> 16) {
645 if (term_only)
646 return 0;
647 switch (iterm->type >> 16) {
648 case UAC_SELECTOR_UNIT:
649 strcpy(name, "Selector");
650 return 8;
651 case UAC1_PROCESSING_UNIT:
652 strcpy(name, "Process Unit");
653 return 12;
654 case UAC1_EXTENSION_UNIT:
655 strcpy(name, "Ext Unit");
656 return 8;
657 case UAC_MIXER_UNIT:
658 strcpy(name, "Mixer");
659 return 5;
660 default:
661 return sprintf(name, "Unit %d", iterm->id);
662 }
663 }
664
665 switch (iterm->type & 0xff00) {
666 case 0x0100:
667 strcpy(name, "PCM");
668 return 3;
669 case 0x0200:
670 strcpy(name, "Mic");
671 return 3;
672 case 0x0400:
673 strcpy(name, "Headset");
674 return 7;
675 case 0x0500:
676 strcpy(name, "Phone");
677 return 5;
678 }
679
680 for (names = iterm_names; names->type; names++) {
681 if (names->type == iterm->type) {
682 strcpy(name, names->name);
683 return strlen(names->name);
684 }
685 }
686
687 return 0;
688 }
689
690 /*
691 * parse the source unit recursively until it reaches to a terminal
692 * or a branched unit.
693 */
694 static int check_input_term(struct mixer_build *state, int id,
695 struct usb_audio_term *term)
696 {
697 int err;
698 void *p1;
699
700 memset(term, 0, sizeof(*term));
701 while ((p1 = find_audio_control_unit(state, id)) != NULL) {
702 unsigned char *hdr = p1;
703 term->id = id;
704 switch (hdr[2]) {
705 case UAC_INPUT_TERMINAL:
706 if (state->mixer->protocol == UAC_VERSION_1) {
707 struct uac_input_terminal_descriptor *d = p1;
708 term->type = le16_to_cpu(d->wTerminalType);
709 term->channels = d->bNrChannels;
710 term->chconfig = le16_to_cpu(d->wChannelConfig);
711 term->name = d->iTerminal;
712 } else { /* UAC_VERSION_2 */
713 struct uac2_input_terminal_descriptor *d = p1;
714 term->type = le16_to_cpu(d->wTerminalType);
715 term->channels = d->bNrChannels;
716 term->chconfig = le32_to_cpu(d->bmChannelConfig);
717 term->name = d->iTerminal;
718
719 /* call recursively to get the clock selectors */
720 err = check_input_term(state, d->bCSourceID, term);
721 if (err < 0)
722 return err;
723 }
724 return 0;
725 case UAC_FEATURE_UNIT: {
726 /* the header is the same for v1 and v2 */
727 struct uac_feature_unit_descriptor *d = p1;
728 id = d->bSourceID;
729 break; /* continue to parse */
730 }
731 case UAC_MIXER_UNIT: {
732 struct uac_mixer_unit_descriptor *d = p1;
733 term->type = d->bDescriptorSubtype << 16; /* virtual type */
734 term->channels = uac_mixer_unit_bNrChannels(d);
735 term->chconfig = uac_mixer_unit_wChannelConfig(d, state->mixer->protocol);
736 term->name = uac_mixer_unit_iMixer(d);
737 return 0;
738 }
739 case UAC_SELECTOR_UNIT:
740 case UAC2_CLOCK_SELECTOR: {
741 struct uac_selector_unit_descriptor *d = p1;
742 /* call recursively to retrieve the channel info */
743 err = check_input_term(state, d->baSourceID[0], term);
744 if (err < 0)
745 return err;
746 term->type = d->bDescriptorSubtype << 16; /* virtual type */
747 term->id = id;
748 term->name = uac_selector_unit_iSelector(d);
749 return 0;
750 }
751 case UAC1_PROCESSING_UNIT:
752 case UAC1_EXTENSION_UNIT:
753 /* UAC2_PROCESSING_UNIT_V2 */
754 /* UAC2_EFFECT_UNIT */
755 case UAC2_EXTENSION_UNIT_V2: {
756 struct uac_processing_unit_descriptor *d = p1;
757
758 if (state->mixer->protocol == UAC_VERSION_2 &&
759 hdr[2] == UAC2_EFFECT_UNIT) {
760 /* UAC2/UAC1 unit IDs overlap here in an
761 * uncompatible way. Ignore this unit for now.
762 */
763 return 0;
764 }
765
766 if (d->bNrInPins) {
767 id = d->baSourceID[0];
768 break; /* continue to parse */
769 }
770 term->type = d->bDescriptorSubtype << 16; /* virtual type */
771 term->channels = uac_processing_unit_bNrChannels(d);
772 term->chconfig = uac_processing_unit_wChannelConfig(d, state->mixer->protocol);
773 term->name = uac_processing_unit_iProcessing(d, state->mixer->protocol);
774 return 0;
775 }
776 case UAC2_CLOCK_SOURCE: {
777 struct uac_clock_source_descriptor *d = p1;
778 term->type = d->bDescriptorSubtype << 16; /* virtual type */
779 term->id = id;
780 term->name = d->iClockSource;
781 return 0;
782 }
783 default:
784 return -ENODEV;
785 }
786 }
787 return -ENODEV;
788 }
789
790 /*
791 * Feature Unit
792 */
793
794 /* feature unit control information */
795 struct usb_feature_control_info {
796 const char *name;
797 unsigned int type; /* control type (mute, volume, etc.) */
798 };
799
800 static struct usb_feature_control_info audio_feature_info[] = {
801 { "Mute", USB_MIXER_INV_BOOLEAN },
802 { "Volume", USB_MIXER_S16 },
803 { "Tone Control - Bass", USB_MIXER_S8 },
804 { "Tone Control - Mid", USB_MIXER_S8 },
805 { "Tone Control - Treble", USB_MIXER_S8 },
806 { "Graphic Equalizer", USB_MIXER_S8 }, /* FIXME: not implemeted yet */
807 { "Auto Gain Control", USB_MIXER_BOOLEAN },
808 { "Delay Control", USB_MIXER_U16 },
809 { "Bass Boost", USB_MIXER_BOOLEAN },
810 { "Loudness", USB_MIXER_BOOLEAN },
811 /* UAC2 specific */
812 { "Input Gain Control", USB_MIXER_U16 },
813 { "Input Gain Pad Control", USB_MIXER_BOOLEAN },
814 { "Phase Inverter Control", USB_MIXER_BOOLEAN },
815 };
816
817 /* private_free callback */
818 static void usb_mixer_elem_free(struct snd_kcontrol *kctl)
819 {
820 kfree(kctl->private_data);
821 kctl->private_data = NULL;
822 }
823
824 /*
825 * interface to ALSA control for feature/mixer units
826 */
827
828 /* volume control quirks */
829 static void volume_control_quirks(struct usb_mixer_elem_info *cval,
830 struct snd_kcontrol *kctl)
831 {
832 struct snd_usb_audio *chip = cval->mixer->chip;
833 switch (chip->usb_id) {
834 case USB_ID(0x0763, 0x2030): /* M-Audio Fast Track C400 */
835 case USB_ID(0x0763, 0x2031): /* M-Audio Fast Track C600 */
836 if (strcmp(kctl->id.name, "Effect Duration") == 0) {
837 cval->min = 0x0000;
838 cval->max = 0xffff;
839 cval->res = 0x00e6;
840 break;
841 }
842 if (strcmp(kctl->id.name, "Effect Volume") == 0 ||
843 strcmp(kctl->id.name, "Effect Feedback Volume") == 0) {
844 cval->min = 0x00;
845 cval->max = 0xff;
846 break;
847 }
848 if (strstr(kctl->id.name, "Effect Return") != NULL) {
849 cval->min = 0xb706;
850 cval->max = 0xff7b;
851 cval->res = 0x0073;
852 break;
853 }
854 if ((strstr(kctl->id.name, "Playback Volume") != NULL) ||
855 (strstr(kctl->id.name, "Effect Send") != NULL)) {
856 cval->min = 0xb5fb; /* -73 dB = 0xb6ff */
857 cval->max = 0xfcfe;
858 cval->res = 0x0073;
859 }
860 break;
861
862 case USB_ID(0x0763, 0x2081): /* M-Audio Fast Track Ultra 8R */
863 case USB_ID(0x0763, 0x2080): /* M-Audio Fast Track Ultra */
864 if (strcmp(kctl->id.name, "Effect Duration") == 0) {
865 usb_audio_info(chip,
866 "set quirk for FTU Effect Duration\n");
867 cval->min = 0x0000;
868 cval->max = 0x7f00;
869 cval->res = 0x0100;
870 break;
871 }
872 if (strcmp(kctl->id.name, "Effect Volume") == 0 ||
873 strcmp(kctl->id.name, "Effect Feedback Volume") == 0) {
874 usb_audio_info(chip,
875 "set quirks for FTU Effect Feedback/Volume\n");
876 cval->min = 0x00;
877 cval->max = 0x7f;
878 break;
879 }
880 break;
881
882 case USB_ID(0x0471, 0x0101):
883 case USB_ID(0x0471, 0x0104):
884 case USB_ID(0x0471, 0x0105):
885 case USB_ID(0x0672, 0x1041):
886 /* quirk for UDA1321/N101.
887 * note that detection between firmware 2.1.1.7 (N101)
888 * and later 2.1.1.21 is not very clear from datasheets.
889 * I hope that the min value is -15360 for newer firmware --jk
890 */
891 if (!strcmp(kctl->id.name, "PCM Playback Volume") &&
892 cval->min == -15616) {
893 usb_audio_info(chip,
894 "set volume quirk for UDA1321/N101 chip\n");
895 cval->max = -256;
896 }
897 break;
898
899 case USB_ID(0x046d, 0x09a4):
900 if (!strcmp(kctl->id.name, "Mic Capture Volume")) {
901 usb_audio_info(chip,
902 "set volume quirk for QuickCam E3500\n");
903 cval->min = 6080;
904 cval->max = 8768;
905 cval->res = 192;
906 }
907 break;
908
909 case USB_ID(0x046d, 0x0807): /* Logitech Webcam C500 */
910 case USB_ID(0x046d, 0x0808):
911 case USB_ID(0x046d, 0x0809):
912 case USB_ID(0x046d, 0x081b): /* HD Webcam c310 */
913 case USB_ID(0x046d, 0x081d): /* HD Webcam c510 */
914 case USB_ID(0x046d, 0x0825): /* HD Webcam c270 */
915 case USB_ID(0x046d, 0x0826): /* HD Webcam c525 */
916 case USB_ID(0x046d, 0x0991):
917 /* Most audio usb devices lie about volume resolution.
918 * Most Logitech webcams have res = 384.
919 * Proboly there is some logitech magic behind this number --fishor
920 */
921 if (!strcmp(kctl->id.name, "Mic Capture Volume")) {
922 usb_audio_info(chip,
923 "set resolution quirk: cval->res = 384\n");
924 cval->res = 384;
925 }
926 break;
927 }
928 }
929
930 /*
931 * retrieve the minimum and maximum values for the specified control
932 */
933 static int get_min_max_with_quirks(struct usb_mixer_elem_info *cval,
934 int default_min, struct snd_kcontrol *kctl)
935 {
936 /* for failsafe */
937 cval->min = default_min;
938 cval->max = cval->min + 1;
939 cval->res = 1;
940 cval->dBmin = cval->dBmax = 0;
941
942 if (cval->val_type == USB_MIXER_BOOLEAN ||
943 cval->val_type == USB_MIXER_INV_BOOLEAN) {
944 cval->initialized = 1;
945 } else {
946 int minchn = 0;
947 if (cval->cmask) {
948 int i;
949 for (i = 0; i < MAX_CHANNELS; i++)
950 if (cval->cmask & (1 << i)) {
951 minchn = i + 1;
952 break;
953 }
954 }
955 if (get_ctl_value(cval, UAC_GET_MAX, (cval->control << 8) | minchn, &cval->max) < 0 ||
956 get_ctl_value(cval, UAC_GET_MIN, (cval->control << 8) | minchn, &cval->min) < 0) {
957 usb_audio_err(cval->mixer->chip,
958 "%d:%d: cannot get min/max values for control %d (id %d)\n",
959 cval->id, snd_usb_ctrl_intf(cval->mixer->chip),
960 cval->control, cval->id);
961 return -EINVAL;
962 }
963 if (get_ctl_value(cval, UAC_GET_RES,
964 (cval->control << 8) | minchn,
965 &cval->res) < 0) {
966 cval->res = 1;
967 } else {
968 int last_valid_res = cval->res;
969
970 while (cval->res > 1) {
971 if (snd_usb_mixer_set_ctl_value(cval, UAC_SET_RES,
972 (cval->control << 8) | minchn,
973 cval->res / 2) < 0)
974 break;
975 cval->res /= 2;
976 }
977 if (get_ctl_value(cval, UAC_GET_RES,
978 (cval->control << 8) | minchn, &cval->res) < 0)
979 cval->res = last_valid_res;
980 }
981 if (cval->res == 0)
982 cval->res = 1;
983
984 /* Additional checks for the proper resolution
985 *
986 * Some devices report smaller resolutions than actually
987 * reacting. They don't return errors but simply clip
988 * to the lower aligned value.
989 */
990 if (cval->min + cval->res < cval->max) {
991 int last_valid_res = cval->res;
992 int saved, test, check;
993 get_cur_mix_raw(cval, minchn, &saved);
994 for (;;) {
995 test = saved;
996 if (test < cval->max)
997 test += cval->res;
998 else
999 test -= cval->res;
1000 if (test < cval->min || test > cval->max ||
1001 set_cur_mix_value(cval, minchn, 0, test) ||
1002 get_cur_mix_raw(cval, minchn, &check)) {
1003 cval->res = last_valid_res;
1004 break;
1005 }
1006 if (test == check)
1007 break;
1008 cval->res *= 2;
1009 }
1010 set_cur_mix_value(cval, minchn, 0, saved);
1011 }
1012
1013 cval->initialized = 1;
1014 }
1015
1016 if (kctl)
1017 volume_control_quirks(cval, kctl);
1018
1019 /* USB descriptions contain the dB scale in 1/256 dB unit
1020 * while ALSA TLV contains in 1/100 dB unit
1021 */
1022 cval->dBmin = (convert_signed_value(cval, cval->min) * 100) / 256;
1023 cval->dBmax = (convert_signed_value(cval, cval->max) * 100) / 256;
1024 if (cval->dBmin > cval->dBmax) {
1025 /* something is wrong; assume it's either from/to 0dB */
1026 if (cval->dBmin < 0)
1027 cval->dBmax = 0;
1028 else if (cval->dBmin > 0)
1029 cval->dBmin = 0;
1030 if (cval->dBmin > cval->dBmax) {
1031 /* totally crap, return an error */
1032 return -EINVAL;
1033 }
1034 }
1035
1036 return 0;
1037 }
1038
1039 #define get_min_max(cval, def) get_min_max_with_quirks(cval, def, NULL)
1040
1041 /* get a feature/mixer unit info */
1042 static int mixer_ctl_feature_info(struct snd_kcontrol *kcontrol,
1043 struct snd_ctl_elem_info *uinfo)
1044 {
1045 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1046
1047 if (cval->val_type == USB_MIXER_BOOLEAN ||
1048 cval->val_type == USB_MIXER_INV_BOOLEAN)
1049 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1050 else
1051 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
1052 uinfo->count = cval->channels;
1053 if (cval->val_type == USB_MIXER_BOOLEAN ||
1054 cval->val_type == USB_MIXER_INV_BOOLEAN) {
1055 uinfo->value.integer.min = 0;
1056 uinfo->value.integer.max = 1;
1057 } else {
1058 if (!cval->initialized) {
1059 get_min_max_with_quirks(cval, 0, kcontrol);
1060 if (cval->initialized && cval->dBmin >= cval->dBmax) {
1061 kcontrol->vd[0].access &=
1062 ~(SNDRV_CTL_ELEM_ACCESS_TLV_READ |
1063 SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK);
1064 snd_ctl_notify(cval->mixer->chip->card,
1065 SNDRV_CTL_EVENT_MASK_INFO,
1066 &kcontrol->id);
1067 }
1068 }
1069 uinfo->value.integer.min = 0;
1070 uinfo->value.integer.max =
1071 (cval->max - cval->min + cval->res - 1) / cval->res;
1072 }
1073 return 0;
1074 }
1075
1076 /* get the current value from feature/mixer unit */
1077 static int mixer_ctl_feature_get(struct snd_kcontrol *kcontrol,
1078 struct snd_ctl_elem_value *ucontrol)
1079 {
1080 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1081 int c, cnt, val, err;
1082
1083 ucontrol->value.integer.value[0] = cval->min;
1084 if (cval->cmask) {
1085 cnt = 0;
1086 for (c = 0; c < MAX_CHANNELS; c++) {
1087 if (!(cval->cmask & (1 << c)))
1088 continue;
1089 err = get_cur_mix_value(cval, c + 1, cnt, &val);
1090 if (err < 0)
1091 return cval->mixer->ignore_ctl_error ? 0 : err;
1092 val = get_relative_value(cval, val);
1093 ucontrol->value.integer.value[cnt] = val;
1094 cnt++;
1095 }
1096 return 0;
1097 } else {
1098 /* master channel */
1099 err = get_cur_mix_value(cval, 0, 0, &val);
1100 if (err < 0)
1101 return cval->mixer->ignore_ctl_error ? 0 : err;
1102 val = get_relative_value(cval, val);
1103 ucontrol->value.integer.value[0] = val;
1104 }
1105 return 0;
1106 }
1107
1108 /* put the current value to feature/mixer unit */
1109 static int mixer_ctl_feature_put(struct snd_kcontrol *kcontrol,
1110 struct snd_ctl_elem_value *ucontrol)
1111 {
1112 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1113 int c, cnt, val, oval, err;
1114 int changed = 0;
1115
1116 if (cval->cmask) {
1117 cnt = 0;
1118 for (c = 0; c < MAX_CHANNELS; c++) {
1119 if (!(cval->cmask & (1 << c)))
1120 continue;
1121 err = get_cur_mix_value(cval, c + 1, cnt, &oval);
1122 if (err < 0)
1123 return cval->mixer->ignore_ctl_error ? 0 : err;
1124 val = ucontrol->value.integer.value[cnt];
1125 val = get_abs_value(cval, val);
1126 if (oval != val) {
1127 set_cur_mix_value(cval, c + 1, cnt, val);
1128 changed = 1;
1129 }
1130 cnt++;
1131 }
1132 } else {
1133 /* master channel */
1134 err = get_cur_mix_value(cval, 0, 0, &oval);
1135 if (err < 0)
1136 return cval->mixer->ignore_ctl_error ? 0 : err;
1137 val = ucontrol->value.integer.value[0];
1138 val = get_abs_value(cval, val);
1139 if (val != oval) {
1140 set_cur_mix_value(cval, 0, 0, val);
1141 changed = 1;
1142 }
1143 }
1144 return changed;
1145 }
1146
1147 static struct snd_kcontrol_new usb_feature_unit_ctl = {
1148 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1149 .name = "", /* will be filled later manually */
1150 .info = mixer_ctl_feature_info,
1151 .get = mixer_ctl_feature_get,
1152 .put = mixer_ctl_feature_put,
1153 };
1154
1155 /* the read-only variant */
1156 static struct snd_kcontrol_new usb_feature_unit_ctl_ro = {
1157 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1158 .name = "", /* will be filled later manually */
1159 .info = mixer_ctl_feature_info,
1160 .get = mixer_ctl_feature_get,
1161 .put = NULL,
1162 };
1163
1164 /*
1165 * This symbol is exported in order to allow the mixer quirks to
1166 * hook up to the standard feature unit control mechanism
1167 */
1168 struct snd_kcontrol_new *snd_usb_feature_unit_ctl = &usb_feature_unit_ctl;
1169
1170 /*
1171 * build a feature control
1172 */
1173 static size_t append_ctl_name(struct snd_kcontrol *kctl, const char *str)
1174 {
1175 return strlcat(kctl->id.name, str, sizeof(kctl->id.name));
1176 }
1177
1178 /*
1179 * A lot of headsets/headphones have a "Speaker" mixer. Make sure we
1180 * rename it to "Headphone". We determine if something is a headphone
1181 * similar to how udev determines form factor.
1182 */
1183 static void check_no_speaker_on_headset(struct snd_kcontrol *kctl,
1184 struct snd_card *card)
1185 {
1186 const char *names_to_check[] = {
1187 "Headset", "headset", "Headphone", "headphone", NULL};
1188 const char **s;
1189 bool found = false;
1190
1191 if (strcmp("Speaker", kctl->id.name))
1192 return;
1193
1194 for (s = names_to_check; *s; s++)
1195 if (strstr(card->shortname, *s)) {
1196 found = true;
1197 break;
1198 }
1199
1200 if (!found)
1201 return;
1202
1203 strlcpy(kctl->id.name, "Headphone", sizeof(kctl->id.name));
1204 }
1205
1206 static void build_feature_ctl(struct mixer_build *state, void *raw_desc,
1207 unsigned int ctl_mask, int control,
1208 struct usb_audio_term *iterm, int unitid,
1209 int readonly_mask)
1210 {
1211 struct uac_feature_unit_descriptor *desc = raw_desc;
1212 unsigned int len = 0;
1213 int mapped_name = 0;
1214 int nameid = uac_feature_unit_iFeature(desc);
1215 struct snd_kcontrol *kctl;
1216 struct usb_mixer_elem_info *cval;
1217 const struct usbmix_name_map *map;
1218 unsigned int range;
1219
1220 control++; /* change from zero-based to 1-based value */
1221
1222 if (control == UAC_FU_GRAPHIC_EQUALIZER) {
1223 /* FIXME: not supported yet */
1224 return;
1225 }
1226
1227 map = find_map(state, unitid, control);
1228 if (check_ignored_ctl(map))
1229 return;
1230
1231 cval = kzalloc(sizeof(*cval), GFP_KERNEL);
1232 if (!cval)
1233 return;
1234 cval->mixer = state->mixer;
1235 cval->id = unitid;
1236 cval->control = control;
1237 cval->cmask = ctl_mask;
1238 cval->val_type = audio_feature_info[control-1].type;
1239 if (ctl_mask == 0) {
1240 cval->channels = 1; /* master channel */
1241 cval->master_readonly = readonly_mask;
1242 } else {
1243 int i, c = 0;
1244 for (i = 0; i < 16; i++)
1245 if (ctl_mask & (1 << i))
1246 c++;
1247 cval->channels = c;
1248 cval->ch_readonly = readonly_mask;
1249 }
1250
1251 /*
1252 * If all channels in the mask are marked read-only, make the control
1253 * read-only. set_cur_mix_value() will check the mask again and won't
1254 * issue write commands to read-only channels.
1255 */
1256 if (cval->channels == readonly_mask)
1257 kctl = snd_ctl_new1(&usb_feature_unit_ctl_ro, cval);
1258 else
1259 kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval);
1260
1261 if (!kctl) {
1262 usb_audio_err(state->chip, "cannot malloc kcontrol\n");
1263 kfree(cval);
1264 return;
1265 }
1266 kctl->private_free = usb_mixer_elem_free;
1267
1268 len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name));
1269 mapped_name = len != 0;
1270 if (!len && nameid)
1271 len = snd_usb_copy_string_desc(state, nameid,
1272 kctl->id.name, sizeof(kctl->id.name));
1273
1274 switch (control) {
1275 case UAC_FU_MUTE:
1276 case UAC_FU_VOLUME:
1277 /*
1278 * determine the control name. the rule is:
1279 * - if a name id is given in descriptor, use it.
1280 * - if the connected input can be determined, then use the name
1281 * of terminal type.
1282 * - if the connected output can be determined, use it.
1283 * - otherwise, anonymous name.
1284 */
1285 if (!len) {
1286 len = get_term_name(state, iterm, kctl->id.name,
1287 sizeof(kctl->id.name), 1);
1288 if (!len)
1289 len = get_term_name(state, &state->oterm,
1290 kctl->id.name,
1291 sizeof(kctl->id.name), 1);
1292 if (!len)
1293 len = snprintf(kctl->id.name,
1294 sizeof(kctl->id.name),
1295 "Feature %d", unitid);
1296 }
1297
1298 if (!mapped_name)
1299 check_no_speaker_on_headset(kctl, state->mixer->chip->card);
1300
1301 /*
1302 * determine the stream direction:
1303 * if the connected output is USB stream, then it's likely a
1304 * capture stream. otherwise it should be playback (hopefully :)
1305 */
1306 if (!mapped_name && !(state->oterm.type >> 16)) {
1307 if ((state->oterm.type & 0xff00) == 0x0100)
1308 len = append_ctl_name(kctl, " Capture");
1309 else
1310 len = append_ctl_name(kctl, " Playback");
1311 }
1312 append_ctl_name(kctl, control == UAC_FU_MUTE ?
1313 " Switch" : " Volume");
1314 break;
1315 default:
1316 if (!len)
1317 strlcpy(kctl->id.name, audio_feature_info[control-1].name,
1318 sizeof(kctl->id.name));
1319 break;
1320 }
1321
1322 /* get min/max values */
1323 get_min_max_with_quirks(cval, 0, kctl);
1324
1325 if (control == UAC_FU_VOLUME) {
1326 check_mapped_dB(map, cval);
1327 if (cval->dBmin < cval->dBmax || !cval->initialized) {
1328 kctl->tlv.c = snd_usb_mixer_vol_tlv;
1329 kctl->vd[0].access |=
1330 SNDRV_CTL_ELEM_ACCESS_TLV_READ |
1331 SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK;
1332 }
1333 }
1334
1335 range = (cval->max - cval->min) / cval->res;
1336 /*
1337 * Are there devices with volume range more than 255? I use a bit more
1338 * to be sure. 384 is a resolution magic number found on Logitech
1339 * devices. It will definitively catch all buggy Logitech devices.
1340 */
1341 if (range > 384) {
1342 usb_audio_warn(state->chip,
1343 "Warning! Unlikely big volume range (=%u), cval->res is probably wrong.",
1344 range);
1345 usb_audio_warn(state->chip,
1346 "[%d] FU [%s] ch = %d, val = %d/%d/%d",
1347 cval->id, kctl->id.name, cval->channels,
1348 cval->min, cval->max, cval->res);
1349 }
1350
1351 usb_audio_dbg(state->chip, "[%d] FU [%s] ch = %d, val = %d/%d/%d\n",
1352 cval->id, kctl->id.name, cval->channels,
1353 cval->min, cval->max, cval->res);
1354 snd_usb_mixer_add_control(state->mixer, kctl);
1355 }
1356
1357 /*
1358 * parse a feature unit
1359 *
1360 * most of controls are defined here.
1361 */
1362 static int parse_audio_feature_unit(struct mixer_build *state, int unitid,
1363 void *_ftr)
1364 {
1365 int channels, i, j;
1366 struct usb_audio_term iterm;
1367 unsigned int master_bits, first_ch_bits;
1368 int err, csize;
1369 struct uac_feature_unit_descriptor *hdr = _ftr;
1370 __u8 *bmaControls;
1371
1372 if (state->mixer->protocol == UAC_VERSION_1) {
1373 csize = hdr->bControlSize;
1374 if (!csize) {
1375 usb_audio_dbg(state->chip,
1376 "unit %u: invalid bControlSize == 0\n",
1377 unitid);
1378 return -EINVAL;
1379 }
1380 channels = (hdr->bLength - 7) / csize - 1;
1381 bmaControls = hdr->bmaControls;
1382 if (hdr->bLength < 7 + csize) {
1383 usb_audio_err(state->chip,
1384 "unit %u: invalid UAC_FEATURE_UNIT descriptor\n",
1385 unitid);
1386 return -EINVAL;
1387 }
1388 } else {
1389 struct uac2_feature_unit_descriptor *ftr = _ftr;
1390 csize = 4;
1391 channels = (hdr->bLength - 6) / 4 - 1;
1392 bmaControls = ftr->bmaControls;
1393 if (hdr->bLength < 6 + csize) {
1394 usb_audio_err(state->chip,
1395 "unit %u: invalid UAC_FEATURE_UNIT descriptor\n",
1396 unitid);
1397 return -EINVAL;
1398 }
1399 }
1400
1401 /* parse the source unit */
1402 if ((err = parse_audio_unit(state, hdr->bSourceID)) < 0)
1403 return err;
1404
1405 /* determine the input source type and name */
1406 err = check_input_term(state, hdr->bSourceID, &iterm);
1407 if (err < 0)
1408 return err;
1409
1410 master_bits = snd_usb_combine_bytes(bmaControls, csize);
1411 /* master configuration quirks */
1412 switch (state->chip->usb_id) {
1413 case USB_ID(0x08bb, 0x2702):
1414 usb_audio_info(state->chip,
1415 "usbmixer: master volume quirk for PCM2702 chip\n");
1416 /* disable non-functional volume control */
1417 master_bits &= ~UAC_CONTROL_BIT(UAC_FU_VOLUME);
1418 break;
1419 case USB_ID(0x1130, 0xf211):
1420 usb_audio_info(state->chip,
1421 "usbmixer: volume control quirk for Tenx TP6911 Audio Headset\n");
1422 /* disable non-functional volume control */
1423 channels = 0;
1424 break;
1425
1426 }
1427 if (channels > 0)
1428 first_ch_bits = snd_usb_combine_bytes(bmaControls + csize, csize);
1429 else
1430 first_ch_bits = 0;
1431
1432 if (state->mixer->protocol == UAC_VERSION_1) {
1433 /* check all control types */
1434 for (i = 0; i < 10; i++) {
1435 unsigned int ch_bits = 0;
1436 for (j = 0; j < channels; j++) {
1437 unsigned int mask;
1438
1439 mask = snd_usb_combine_bytes(bmaControls +
1440 csize * (j+1), csize);
1441 if (mask & (1 << i))
1442 ch_bits |= (1 << j);
1443 }
1444 /* audio class v1 controls are never read-only */
1445
1446 /*
1447 * The first channel must be set
1448 * (for ease of programming).
1449 */
1450 if (ch_bits & 1)
1451 build_feature_ctl(state, _ftr, ch_bits, i,
1452 &iterm, unitid, 0);
1453 if (master_bits & (1 << i))
1454 build_feature_ctl(state, _ftr, 0, i, &iterm,
1455 unitid, 0);
1456 }
1457 } else { /* UAC_VERSION_2 */
1458 for (i = 0; i < ARRAY_SIZE(audio_feature_info); i++) {
1459 unsigned int ch_bits = 0;
1460 unsigned int ch_read_only = 0;
1461
1462 for (j = 0; j < channels; j++) {
1463 unsigned int mask;
1464
1465 mask = snd_usb_combine_bytes(bmaControls +
1466 csize * (j+1), csize);
1467 if (uac2_control_is_readable(mask, i)) {
1468 ch_bits |= (1 << j);
1469 if (!uac2_control_is_writeable(mask, i))
1470 ch_read_only |= (1 << j);
1471 }
1472 }
1473
1474 /*
1475 * NOTE: build_feature_ctl() will mark the control
1476 * read-only if all channels are marked read-only in
1477 * the descriptors. Otherwise, the control will be
1478 * reported as writeable, but the driver will not
1479 * actually issue a write command for read-only
1480 * channels.
1481 */
1482
1483 /*
1484 * The first channel must be set
1485 * (for ease of programming).
1486 */
1487 if (ch_bits & 1)
1488 build_feature_ctl(state, _ftr, ch_bits, i,
1489 &iterm, unitid, ch_read_only);
1490 if (uac2_control_is_readable(master_bits, i))
1491 build_feature_ctl(state, _ftr, 0, i, &iterm, unitid,
1492 !uac2_control_is_writeable(master_bits, i));
1493 }
1494 }
1495
1496 return 0;
1497 }
1498
1499 /*
1500 * Mixer Unit
1501 */
1502
1503 /*
1504 * build a mixer unit control
1505 *
1506 * the callbacks are identical with feature unit.
1507 * input channel number (zero based) is given in control field instead.
1508 */
1509 static void build_mixer_unit_ctl(struct mixer_build *state,
1510 struct uac_mixer_unit_descriptor *desc,
1511 int in_pin, int in_ch, int unitid,
1512 struct usb_audio_term *iterm)
1513 {
1514 struct usb_mixer_elem_info *cval;
1515 unsigned int num_outs = uac_mixer_unit_bNrChannels(desc);
1516 unsigned int i, len;
1517 struct snd_kcontrol *kctl;
1518 const struct usbmix_name_map *map;
1519
1520 map = find_map(state, unitid, 0);
1521 if (check_ignored_ctl(map))
1522 return;
1523
1524 cval = kzalloc(sizeof(*cval), GFP_KERNEL);
1525 if (!cval)
1526 return;
1527
1528 cval->mixer = state->mixer;
1529 cval->id = unitid;
1530 cval->control = in_ch + 1; /* based on 1 */
1531 cval->val_type = USB_MIXER_S16;
1532 for (i = 0; i < num_outs; i++) {
1533 __u8 *c = uac_mixer_unit_bmControls(desc, state->mixer->protocol);
1534
1535 if (check_matrix_bitmap(c, in_ch, i, num_outs)) {
1536 cval->cmask |= (1 << i);
1537 cval->channels++;
1538 }
1539 }
1540
1541 /* get min/max values */
1542 get_min_max(cval, 0);
1543
1544 kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval);
1545 if (!kctl) {
1546 usb_audio_err(state->chip, "cannot malloc kcontrol\n");
1547 kfree(cval);
1548 return;
1549 }
1550 kctl->private_free = usb_mixer_elem_free;
1551
1552 len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name));
1553 if (!len)
1554 len = get_term_name(state, iterm, kctl->id.name,
1555 sizeof(kctl->id.name), 0);
1556 if (!len)
1557 len = sprintf(kctl->id.name, "Mixer Source %d", in_ch + 1);
1558 append_ctl_name(kctl, " Volume");
1559
1560 usb_audio_dbg(state->chip, "[%d] MU [%s] ch = %d, val = %d/%d\n",
1561 cval->id, kctl->id.name, cval->channels, cval->min, cval->max);
1562 snd_usb_mixer_add_control(state->mixer, kctl);
1563 }
1564
1565 /*
1566 * parse a mixer unit
1567 */
1568 static int parse_audio_mixer_unit(struct mixer_build *state, int unitid,
1569 void *raw_desc)
1570 {
1571 struct uac_mixer_unit_descriptor *desc = raw_desc;
1572 struct usb_audio_term iterm;
1573 int input_pins, num_ins, num_outs;
1574 int pin, ich, err;
1575
1576 if (desc->bLength < 11 || !(input_pins = desc->bNrInPins) ||
1577 !(num_outs = uac_mixer_unit_bNrChannels(desc))) {
1578 usb_audio_err(state->chip,
1579 "invalid MIXER UNIT descriptor %d\n",
1580 unitid);
1581 return -EINVAL;
1582 }
1583 /* no bmControls field (e.g. Maya44) -> ignore */
1584 if (desc->bLength <= 10 + input_pins) {
1585 usb_audio_dbg(state->chip, "MU %d has no bmControls field\n",
1586 unitid);
1587 return 0;
1588 }
1589
1590 num_ins = 0;
1591 ich = 0;
1592 for (pin = 0; pin < input_pins; pin++) {
1593 err = parse_audio_unit(state, desc->baSourceID[pin]);
1594 if (err < 0)
1595 continue;
1596 err = check_input_term(state, desc->baSourceID[pin], &iterm);
1597 if (err < 0)
1598 return err;
1599 num_ins += iterm.channels;
1600 for (; ich < num_ins; ich++) {
1601 int och, ich_has_controls = 0;
1602
1603 for (och = 0; och < num_outs; och++) {
1604 __u8 *c = uac_mixer_unit_bmControls(desc,
1605 state->mixer->protocol);
1606
1607 if (check_matrix_bitmap(c, ich, och, num_outs)) {
1608 ich_has_controls = 1;
1609 break;
1610 }
1611 }
1612 if (ich_has_controls)
1613 build_mixer_unit_ctl(state, desc, pin, ich,
1614 unitid, &iterm);
1615 }
1616 }
1617 return 0;
1618 }
1619
1620 /*
1621 * Processing Unit / Extension Unit
1622 */
1623
1624 /* get callback for processing/extension unit */
1625 static int mixer_ctl_procunit_get(struct snd_kcontrol *kcontrol,
1626 struct snd_ctl_elem_value *ucontrol)
1627 {
1628 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1629 int err, val;
1630
1631 err = get_cur_ctl_value(cval, cval->control << 8, &val);
1632 if (err < 0 && cval->mixer->ignore_ctl_error) {
1633 ucontrol->value.integer.value[0] = cval->min;
1634 return 0;
1635 }
1636 if (err < 0)
1637 return err;
1638 val = get_relative_value(cval, val);
1639 ucontrol->value.integer.value[0] = val;
1640 return 0;
1641 }
1642
1643 /* put callback for processing/extension unit */
1644 static int mixer_ctl_procunit_put(struct snd_kcontrol *kcontrol,
1645 struct snd_ctl_elem_value *ucontrol)
1646 {
1647 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1648 int val, oval, err;
1649
1650 err = get_cur_ctl_value(cval, cval->control << 8, &oval);
1651 if (err < 0) {
1652 if (cval->mixer->ignore_ctl_error)
1653 return 0;
1654 return err;
1655 }
1656 val = ucontrol->value.integer.value[0];
1657 val = get_abs_value(cval, val);
1658 if (val != oval) {
1659 set_cur_ctl_value(cval, cval->control << 8, val);
1660 return 1;
1661 }
1662 return 0;
1663 }
1664
1665 /* alsa control interface for processing/extension unit */
1666 static struct snd_kcontrol_new mixer_procunit_ctl = {
1667 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1668 .name = "", /* will be filled later */
1669 .info = mixer_ctl_feature_info,
1670 .get = mixer_ctl_procunit_get,
1671 .put = mixer_ctl_procunit_put,
1672 };
1673
1674 /*
1675 * predefined data for processing units
1676 */
1677 struct procunit_value_info {
1678 int control;
1679 char *suffix;
1680 int val_type;
1681 int min_value;
1682 };
1683
1684 struct procunit_info {
1685 int type;
1686 char *name;
1687 struct procunit_value_info *values;
1688 };
1689
1690 static struct procunit_value_info updown_proc_info[] = {
1691 { UAC_UD_ENABLE, "Switch", USB_MIXER_BOOLEAN },
1692 { UAC_UD_MODE_SELECT, "Mode Select", USB_MIXER_U8, 1 },
1693 { 0 }
1694 };
1695 static struct procunit_value_info prologic_proc_info[] = {
1696 { UAC_DP_ENABLE, "Switch", USB_MIXER_BOOLEAN },
1697 { UAC_DP_MODE_SELECT, "Mode Select", USB_MIXER_U8, 1 },
1698 { 0 }
1699 };
1700 static struct procunit_value_info threed_enh_proc_info[] = {
1701 { UAC_3D_ENABLE, "Switch", USB_MIXER_BOOLEAN },
1702 { UAC_3D_SPACE, "Spaciousness", USB_MIXER_U8 },
1703 { 0 }
1704 };
1705 static struct procunit_value_info reverb_proc_info[] = {
1706 { UAC_REVERB_ENABLE, "Switch", USB_MIXER_BOOLEAN },
1707 { UAC_REVERB_LEVEL, "Level", USB_MIXER_U8 },
1708 { UAC_REVERB_TIME, "Time", USB_MIXER_U16 },
1709 { UAC_REVERB_FEEDBACK, "Feedback", USB_MIXER_U8 },
1710 { 0 }
1711 };
1712 static struct procunit_value_info chorus_proc_info[] = {
1713 { UAC_CHORUS_ENABLE, "Switch", USB_MIXER_BOOLEAN },
1714 { UAC_CHORUS_LEVEL, "Level", USB_MIXER_U8 },
1715 { UAC_CHORUS_RATE, "Rate", USB_MIXER_U16 },
1716 { UAC_CHORUS_DEPTH, "Depth", USB_MIXER_U16 },
1717 { 0 }
1718 };
1719 static struct procunit_value_info dcr_proc_info[] = {
1720 { UAC_DCR_ENABLE, "Switch", USB_MIXER_BOOLEAN },
1721 { UAC_DCR_RATE, "Ratio", USB_MIXER_U16 },
1722 { UAC_DCR_MAXAMPL, "Max Amp", USB_MIXER_S16 },
1723 { UAC_DCR_THRESHOLD, "Threshold", USB_MIXER_S16 },
1724 { UAC_DCR_ATTACK_TIME, "Attack Time", USB_MIXER_U16 },
1725 { UAC_DCR_RELEASE_TIME, "Release Time", USB_MIXER_U16 },
1726 { 0 }
1727 };
1728
1729 static struct procunit_info procunits[] = {
1730 { UAC_PROCESS_UP_DOWNMIX, "Up Down", updown_proc_info },
1731 { UAC_PROCESS_DOLBY_PROLOGIC, "Dolby Prologic", prologic_proc_info },
1732 { UAC_PROCESS_STEREO_EXTENDER, "3D Stereo Extender", threed_enh_proc_info },
1733 { UAC_PROCESS_REVERB, "Reverb", reverb_proc_info },
1734 { UAC_PROCESS_CHORUS, "Chorus", chorus_proc_info },
1735 { UAC_PROCESS_DYN_RANGE_COMP, "DCR", dcr_proc_info },
1736 { 0 },
1737 };
1738 /*
1739 * predefined data for extension units
1740 */
1741 static struct procunit_value_info clock_rate_xu_info[] = {
1742 { USB_XU_CLOCK_RATE_SELECTOR, "Selector", USB_MIXER_U8, 0 },
1743 { 0 }
1744 };
1745 static struct procunit_value_info clock_source_xu_info[] = {
1746 { USB_XU_CLOCK_SOURCE_SELECTOR, "External", USB_MIXER_BOOLEAN },
1747 { 0 }
1748 };
1749 static struct procunit_value_info spdif_format_xu_info[] = {
1750 { USB_XU_DIGITAL_FORMAT_SELECTOR, "SPDIF/AC3", USB_MIXER_BOOLEAN },
1751 { 0 }
1752 };
1753 static struct procunit_value_info soft_limit_xu_info[] = {
1754 { USB_XU_SOFT_LIMIT_SELECTOR, " ", USB_MIXER_BOOLEAN },
1755 { 0 }
1756 };
1757 static struct procunit_info extunits[] = {
1758 { USB_XU_CLOCK_RATE, "Clock rate", clock_rate_xu_info },
1759 { USB_XU_CLOCK_SOURCE, "DigitalIn CLK source", clock_source_xu_info },
1760 { USB_XU_DIGITAL_IO_STATUS, "DigitalOut format:", spdif_format_xu_info },
1761 { USB_XU_DEVICE_OPTIONS, "AnalogueIn Soft Limit", soft_limit_xu_info },
1762 { 0 }
1763 };
1764
1765 /*
1766 * build a processing/extension unit
1767 */
1768 static int build_audio_procunit(struct mixer_build *state, int unitid,
1769 void *raw_desc, struct procunit_info *list,
1770 char *name)
1771 {
1772 struct uac_processing_unit_descriptor *desc = raw_desc;
1773 int num_ins = desc->bNrInPins;
1774 struct usb_mixer_elem_info *cval;
1775 struct snd_kcontrol *kctl;
1776 int i, err, nameid, type, len;
1777 struct procunit_info *info;
1778 struct procunit_value_info *valinfo;
1779 const struct usbmix_name_map *map;
1780 static struct procunit_value_info default_value_info[] = {
1781 { 0x01, "Switch", USB_MIXER_BOOLEAN },
1782 { 0 }
1783 };
1784 static struct procunit_info default_info = {
1785 0, NULL, default_value_info
1786 };
1787
1788 if (desc->bLength < 13 || desc->bLength < 13 + num_ins ||
1789 desc->bLength < num_ins + uac_processing_unit_bControlSize(desc, state->mixer->protocol)) {
1790 usb_audio_err(state->chip, "invalid %s descriptor (id %d)\n", name, unitid);
1791 return -EINVAL;
1792 }
1793
1794 for (i = 0; i < num_ins; i++) {
1795 if ((err = parse_audio_unit(state, desc->baSourceID[i])) < 0)
1796 return err;
1797 }
1798
1799 type = le16_to_cpu(desc->wProcessType);
1800 for (info = list; info && info->type; info++)
1801 if (info->type == type)
1802 break;
1803 if (!info || !info->type)
1804 info = &default_info;
1805
1806 for (valinfo = info->values; valinfo->control; valinfo++) {
1807 __u8 *controls = uac_processing_unit_bmControls(desc, state->mixer->protocol);
1808
1809 if (!(controls[valinfo->control / 8] & (1 << ((valinfo->control % 8) - 1))))
1810 continue;
1811 map = find_map(state, unitid, valinfo->control);
1812 if (check_ignored_ctl(map))
1813 continue;
1814 cval = kzalloc(sizeof(*cval), GFP_KERNEL);
1815 if (!cval)
1816 return -ENOMEM;
1817 cval->mixer = state->mixer;
1818 cval->id = unitid;
1819 cval->control = valinfo->control;
1820 cval->val_type = valinfo->val_type;
1821 cval->channels = 1;
1822
1823 /* get min/max values */
1824 if (type == UAC_PROCESS_UP_DOWNMIX && cval->control == UAC_UD_MODE_SELECT) {
1825 __u8 *control_spec = uac_processing_unit_specific(desc, state->mixer->protocol);
1826 /* FIXME: hard-coded */
1827 cval->min = 1;
1828 cval->max = control_spec[0];
1829 cval->res = 1;
1830 cval->initialized = 1;
1831 } else {
1832 if (type == USB_XU_CLOCK_RATE) {
1833 /*
1834 * E-Mu USB 0404/0202/TrackerPre/0204
1835 * samplerate control quirk
1836 */
1837 cval->min = 0;
1838 cval->max = 5;
1839 cval->res = 1;
1840 cval->initialized = 1;
1841 } else
1842 get_min_max(cval, valinfo->min_value);
1843 }
1844
1845 kctl = snd_ctl_new1(&mixer_procunit_ctl, cval);
1846 if (!kctl) {
1847 kfree(cval);
1848 return -ENOMEM;
1849 }
1850 kctl->private_free = usb_mixer_elem_free;
1851
1852 if (check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name))) {
1853 /* nothing */ ;
1854 } else if (info->name) {
1855 strlcpy(kctl->id.name, info->name, sizeof(kctl->id.name));
1856 } else {
1857 nameid = uac_processing_unit_iProcessing(desc, state->mixer->protocol);
1858 len = 0;
1859 if (nameid)
1860 len = snd_usb_copy_string_desc(state, nameid,
1861 kctl->id.name,
1862 sizeof(kctl->id.name));
1863 if (!len)
1864 strlcpy(kctl->id.name, name, sizeof(kctl->id.name));
1865 }
1866 append_ctl_name(kctl, " ");
1867 append_ctl_name(kctl, valinfo->suffix);
1868
1869 usb_audio_dbg(state->chip,
1870 "[%d] PU [%s] ch = %d, val = %d/%d\n",
1871 cval->id, kctl->id.name, cval->channels,
1872 cval->min, cval->max);
1873
1874 err = snd_usb_mixer_add_control(state->mixer, kctl);
1875 if (err < 0)
1876 return err;
1877 }
1878 return 0;
1879 }
1880
1881 static int parse_audio_processing_unit(struct mixer_build *state, int unitid,
1882 void *raw_desc)
1883 {
1884 return build_audio_procunit(state, unitid, raw_desc,
1885 procunits, "Processing Unit");
1886 }
1887
1888 static int parse_audio_extension_unit(struct mixer_build *state, int unitid,
1889 void *raw_desc)
1890 {
1891 /*
1892 * Note that we parse extension units with processing unit descriptors.
1893 * That's ok as the layout is the same.
1894 */
1895 return build_audio_procunit(state, unitid, raw_desc,
1896 extunits, "Extension Unit");
1897 }
1898
1899 /*
1900 * Selector Unit
1901 */
1902
1903 /*
1904 * info callback for selector unit
1905 * use an enumerator type for routing
1906 */
1907 static int mixer_ctl_selector_info(struct snd_kcontrol *kcontrol,
1908 struct snd_ctl_elem_info *uinfo)
1909 {
1910 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1911 const char **itemlist = (const char **)kcontrol->private_value;
1912
1913 if (snd_BUG_ON(!itemlist))
1914 return -EINVAL;
1915 return snd_ctl_enum_info(uinfo, 1, cval->max, itemlist);
1916 }
1917
1918 /* get callback for selector unit */
1919 static int mixer_ctl_selector_get(struct snd_kcontrol *kcontrol,
1920 struct snd_ctl_elem_value *ucontrol)
1921 {
1922 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1923 int val, err;
1924
1925 err = get_cur_ctl_value(cval, cval->control << 8, &val);
1926 if (err < 0) {
1927 if (cval->mixer->ignore_ctl_error) {
1928 ucontrol->value.enumerated.item[0] = 0;
1929 return 0;
1930 }
1931 return err;
1932 }
1933 val = get_relative_value(cval, val);
1934 ucontrol->value.enumerated.item[0] = val;
1935 return 0;
1936 }
1937
1938 /* put callback for selector unit */
1939 static int mixer_ctl_selector_put(struct snd_kcontrol *kcontrol,
1940 struct snd_ctl_elem_value *ucontrol)
1941 {
1942 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1943 int val, oval, err;
1944
1945 err = get_cur_ctl_value(cval, cval->control << 8, &oval);
1946 if (err < 0) {
1947 if (cval->mixer->ignore_ctl_error)
1948 return 0;
1949 return err;
1950 }
1951 val = ucontrol->value.enumerated.item[0];
1952 val = get_abs_value(cval, val);
1953 if (val != oval) {
1954 set_cur_ctl_value(cval, cval->control << 8, val);
1955 return 1;
1956 }
1957 return 0;
1958 }
1959
1960 /* alsa control interface for selector unit */
1961 static struct snd_kcontrol_new mixer_selectunit_ctl = {
1962 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1963 .name = "", /* will be filled later */
1964 .info = mixer_ctl_selector_info,
1965 .get = mixer_ctl_selector_get,
1966 .put = mixer_ctl_selector_put,
1967 };
1968
1969 /*
1970 * private free callback.
1971 * free both private_data and private_value
1972 */
1973 static void usb_mixer_selector_elem_free(struct snd_kcontrol *kctl)
1974 {
1975 int i, num_ins = 0;
1976
1977 if (kctl->private_data) {
1978 struct usb_mixer_elem_info *cval = kctl->private_data;
1979 num_ins = cval->max;
1980 kfree(cval);
1981 kctl->private_data = NULL;
1982 }
1983 if (kctl->private_value) {
1984 char **itemlist = (char **)kctl->private_value;
1985 for (i = 0; i < num_ins; i++)
1986 kfree(itemlist[i]);
1987 kfree(itemlist);
1988 kctl->private_value = 0;
1989 }
1990 }
1991
1992 /*
1993 * parse a selector unit
1994 */
1995 static int parse_audio_selector_unit(struct mixer_build *state, int unitid,
1996 void *raw_desc)
1997 {
1998 struct uac_selector_unit_descriptor *desc = raw_desc;
1999 unsigned int i, nameid, len;
2000 int err;
2001 struct usb_mixer_elem_info *cval;
2002 struct snd_kcontrol *kctl;
2003 const struct usbmix_name_map *map;
2004 char **namelist;
2005
2006 if (!desc->bNrInPins || desc->bLength < 5 + desc->bNrInPins) {
2007 usb_audio_err(state->chip,
2008 "invalid SELECTOR UNIT descriptor %d\n", unitid);
2009 return -EINVAL;
2010 }
2011
2012 for (i = 0; i < desc->bNrInPins; i++) {
2013 if ((err = parse_audio_unit(state, desc->baSourceID[i])) < 0)
2014 return err;
2015 }
2016
2017 if (desc->bNrInPins == 1) /* only one ? nonsense! */
2018 return 0;
2019
2020 map = find_map(state, unitid, 0);
2021 if (check_ignored_ctl(map))
2022 return 0;
2023
2024 cval = kzalloc(sizeof(*cval), GFP_KERNEL);
2025 if (!cval)
2026 return -ENOMEM;
2027 cval->mixer = state->mixer;
2028 cval->id = unitid;
2029 cval->val_type = USB_MIXER_U8;
2030 cval->channels = 1;
2031 cval->min = 1;
2032 cval->max = desc->bNrInPins;
2033 cval->res = 1;
2034 cval->initialized = 1;
2035
2036 if (desc->bDescriptorSubtype == UAC2_CLOCK_SELECTOR)
2037 cval->control = UAC2_CX_CLOCK_SELECTOR;
2038 else
2039 cval->control = 0;
2040
2041 namelist = kmalloc(sizeof(char *) * desc->bNrInPins, GFP_KERNEL);
2042 if (!namelist) {
2043 kfree(cval);
2044 return -ENOMEM;
2045 }
2046 #define MAX_ITEM_NAME_LEN 64
2047 for (i = 0; i < desc->bNrInPins; i++) {
2048 struct usb_audio_term iterm;
2049 len = 0;
2050 namelist[i] = kmalloc(MAX_ITEM_NAME_LEN, GFP_KERNEL);
2051 if (!namelist[i]) {
2052 while (i--)
2053 kfree(namelist[i]);
2054 kfree(namelist);
2055 kfree(cval);
2056 return -ENOMEM;
2057 }
2058 len = check_mapped_selector_name(state, unitid, i, namelist[i],
2059 MAX_ITEM_NAME_LEN);
2060 if (! len && check_input_term(state, desc->baSourceID[i], &iterm) >= 0)
2061 len = get_term_name(state, &iterm, namelist[i], MAX_ITEM_NAME_LEN, 0);
2062 if (! len)
2063 sprintf(namelist[i], "Input %u", i);
2064 }
2065
2066 kctl = snd_ctl_new1(&mixer_selectunit_ctl, cval);
2067 if (! kctl) {
2068 usb_audio_err(state->chip, "cannot malloc kcontrol\n");
2069 kfree(namelist);
2070 kfree(cval);
2071 return -ENOMEM;
2072 }
2073 kctl->private_value = (unsigned long)namelist;
2074 kctl->private_free = usb_mixer_selector_elem_free;
2075
2076 nameid = uac_selector_unit_iSelector(desc);
2077 len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name));
2078 if (len)
2079 ;
2080 else if (nameid)
2081 snd_usb_copy_string_desc(state, nameid, kctl->id.name,
2082 sizeof(kctl->id.name));
2083 else {
2084 len = get_term_name(state, &state->oterm,
2085 kctl->id.name, sizeof(kctl->id.name), 0);
2086 if (!len)
2087 strlcpy(kctl->id.name, "USB", sizeof(kctl->id.name));
2088
2089 if (desc->bDescriptorSubtype == UAC2_CLOCK_SELECTOR)
2090 append_ctl_name(kctl, " Clock Source");
2091 else if ((state->oterm.type & 0xff00) == 0x0100)
2092 append_ctl_name(kctl, " Capture Source");
2093 else
2094 append_ctl_name(kctl, " Playback Source");
2095 }
2096
2097 usb_audio_dbg(state->chip, "[%d] SU [%s] items = %d\n",
2098 cval->id, kctl->id.name, desc->bNrInPins);
2099 if ((err = snd_usb_mixer_add_control(state->mixer, kctl)) < 0)
2100 return err;
2101
2102 return 0;
2103 }
2104
2105 /*
2106 * parse an audio unit recursively
2107 */
2108
2109 static int parse_audio_unit(struct mixer_build *state, int unitid)
2110 {
2111 unsigned char *p1;
2112
2113 if (test_and_set_bit(unitid, state->unitbitmap))
2114 return 0; /* the unit already visited */
2115
2116 p1 = find_audio_control_unit(state, unitid);
2117 if (!p1) {
2118 usb_audio_err(state->chip, "unit %d not found!\n", unitid);
2119 return -EINVAL;
2120 }
2121
2122 switch (p1[2]) {
2123 case UAC_INPUT_TERMINAL:
2124 case UAC2_CLOCK_SOURCE:
2125 return 0; /* NOP */
2126 case UAC_MIXER_UNIT:
2127 return parse_audio_mixer_unit(state, unitid, p1);
2128 case UAC_SELECTOR_UNIT:
2129 case UAC2_CLOCK_SELECTOR:
2130 return parse_audio_selector_unit(state, unitid, p1);
2131 case UAC_FEATURE_UNIT:
2132 return parse_audio_feature_unit(state, unitid, p1);
2133 case UAC1_PROCESSING_UNIT:
2134 /* UAC2_EFFECT_UNIT has the same value */
2135 if (state->mixer->protocol == UAC_VERSION_1)
2136 return parse_audio_processing_unit(state, unitid, p1);
2137 else
2138 return 0; /* FIXME - effect units not implemented yet */
2139 case UAC1_EXTENSION_UNIT:
2140 /* UAC2_PROCESSING_UNIT_V2 has the same value */
2141 if (state->mixer->protocol == UAC_VERSION_1)
2142 return parse_audio_extension_unit(state, unitid, p1);
2143 else /* UAC_VERSION_2 */
2144 return parse_audio_processing_unit(state, unitid, p1);
2145 case UAC2_EXTENSION_UNIT_V2:
2146 return parse_audio_extension_unit(state, unitid, p1);
2147 default:
2148 usb_audio_err(state->chip,
2149 "unit %u: unexpected type 0x%02x\n", unitid, p1[2]);
2150 return -EINVAL;
2151 }
2152 }
2153
2154 static void snd_usb_mixer_free(struct usb_mixer_interface *mixer)
2155 {
2156 kfree(mixer->id_elems);
2157 if (mixer->urb) {
2158 kfree(mixer->urb->transfer_buffer);
2159 usb_free_urb(mixer->urb);
2160 }
2161 usb_free_urb(mixer->rc_urb);
2162 kfree(mixer->rc_setup_packet);
2163 kfree(mixer);
2164 }
2165
2166 static int snd_usb_mixer_dev_free(struct snd_device *device)
2167 {
2168 struct usb_mixer_interface *mixer = device->device_data;
2169 snd_usb_mixer_free(mixer);
2170 return 0;
2171 }
2172
2173 /*
2174 * create mixer controls
2175 *
2176 * walk through all UAC_OUTPUT_TERMINAL descriptors to search for mixers
2177 */
2178 static int snd_usb_mixer_controls(struct usb_mixer_interface *mixer)
2179 {
2180 struct mixer_build state;
2181 int err;
2182 const struct usbmix_ctl_map *map;
2183 void *p;
2184
2185 memset(&state, 0, sizeof(state));
2186 state.chip = mixer->chip;
2187 state.mixer = mixer;
2188 state.buffer = mixer->hostif->extra;
2189 state.buflen = mixer->hostif->extralen;
2190
2191 /* check the mapping table */
2192 for (map = usbmix_ctl_maps; map->id; map++) {
2193 if (map->id == state.chip->usb_id) {
2194 state.map = map->map;
2195 state.selector_map = map->selector_map;
2196 mixer->ignore_ctl_error = map->ignore_ctl_error;
2197 break;
2198 }
2199 }
2200
2201 p = NULL;
2202 while ((p = snd_usb_find_csint_desc(mixer->hostif->extra,
2203 mixer->hostif->extralen,
2204 p, UAC_OUTPUT_TERMINAL)) != NULL) {
2205 if (mixer->protocol == UAC_VERSION_1) {
2206 struct uac1_output_terminal_descriptor *desc = p;
2207
2208 if (desc->bLength < sizeof(*desc))
2209 continue; /* invalid descriptor? */
2210 /* mark terminal ID as visited */
2211 set_bit(desc->bTerminalID, state.unitbitmap);
2212 state.oterm.id = desc->bTerminalID;
2213 state.oterm.type = le16_to_cpu(desc->wTerminalType);
2214 state.oterm.name = desc->iTerminal;
2215 err = parse_audio_unit(&state, desc->bSourceID);
2216 if (err < 0 && err != -EINVAL)
2217 return err;
2218 } else { /* UAC_VERSION_2 */
2219 struct uac2_output_terminal_descriptor *desc = p;
2220
2221 if (desc->bLength < sizeof(*desc))
2222 continue; /* invalid descriptor? */
2223 /* mark terminal ID as visited */
2224 set_bit(desc->bTerminalID, state.unitbitmap);
2225 state.oterm.id = desc->bTerminalID;
2226 state.oterm.type = le16_to_cpu(desc->wTerminalType);
2227 state.oterm.name = desc->iTerminal;
2228 err = parse_audio_unit(&state, desc->bSourceID);
2229 if (err < 0 && err != -EINVAL)
2230 return err;
2231
2232 /*
2233 * For UAC2, use the same approach to also add the
2234 * clock selectors
2235 */
2236 err = parse_audio_unit(&state, desc->bCSourceID);
2237 if (err < 0 && err != -EINVAL)
2238 return err;
2239 }
2240 }
2241
2242 return 0;
2243 }
2244
2245 void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer, int unitid)
2246 {
2247 struct usb_mixer_elem_info *info;
2248
2249 for (info = mixer->id_elems[unitid]; info; info = info->next_id_elem)
2250 snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
2251 info->elem_id);
2252 }
2253
2254 static void snd_usb_mixer_dump_cval(struct snd_info_buffer *buffer,
2255 int unitid,
2256 struct usb_mixer_elem_info *cval)
2257 {
2258 static char *val_types[] = {"BOOLEAN", "INV_BOOLEAN",
2259 "S8", "U8", "S16", "U16"};
2260 snd_iprintf(buffer, " Unit: %i\n", unitid);
2261 if (cval->elem_id)
2262 snd_iprintf(buffer, " Control: name=\"%s\", index=%i\n",
2263 cval->elem_id->name, cval->elem_id->index);
2264 snd_iprintf(buffer, " Info: id=%i, control=%i, cmask=0x%x, "
2265 "channels=%i, type=\"%s\"\n", cval->id,
2266 cval->control, cval->cmask, cval->channels,
2267 val_types[cval->val_type]);
2268 snd_iprintf(buffer, " Volume: min=%i, max=%i, dBmin=%i, dBmax=%i\n",
2269 cval->min, cval->max, cval->dBmin, cval->dBmax);
2270 }
2271
2272 static void snd_usb_mixer_proc_read(struct snd_info_entry *entry,
2273 struct snd_info_buffer *buffer)
2274 {
2275 struct snd_usb_audio *chip = entry->private_data;
2276 struct usb_mixer_interface *mixer;
2277 struct usb_mixer_elem_info *cval;
2278 int unitid;
2279
2280 list_for_each_entry(mixer, &chip->mixer_list, list) {
2281 snd_iprintf(buffer,
2282 "USB Mixer: usb_id=0x%08x, ctrlif=%i, ctlerr=%i\n",
2283 chip->usb_id, snd_usb_ctrl_intf(chip),
2284 mixer->ignore_ctl_error);
2285 snd_iprintf(buffer, "Card: %s\n", chip->card->longname);
2286 for (unitid = 0; unitid < MAX_ID_ELEMS; unitid++) {
2287 for (cval = mixer->id_elems[unitid]; cval;
2288 cval = cval->next_id_elem)
2289 snd_usb_mixer_dump_cval(buffer, unitid, cval);
2290 }
2291 }
2292 }
2293
2294 static void snd_usb_mixer_interrupt_v2(struct usb_mixer_interface *mixer,
2295 int attribute, int value, int index)
2296 {
2297 struct usb_mixer_elem_info *info;
2298 __u8 unitid = (index >> 8) & 0xff;
2299 __u8 control = (value >> 8) & 0xff;
2300 __u8 channel = value & 0xff;
2301
2302 if (channel >= MAX_CHANNELS) {
2303 usb_audio_dbg(mixer->chip,
2304 "%s(): bogus channel number %d\n",
2305 __func__, channel);
2306 return;
2307 }
2308
2309 for (info = mixer->id_elems[unitid]; info; info = info->next_id_elem) {
2310 if (info->control != control)
2311 continue;
2312
2313 switch (attribute) {
2314 case UAC2_CS_CUR:
2315 /* invalidate cache, so the value is read from the device */
2316 if (channel)
2317 info->cached &= ~(1 << channel);
2318 else /* master channel */
2319 info->cached = 0;
2320
2321 snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
2322 info->elem_id);
2323 break;
2324
2325 case UAC2_CS_RANGE:
2326 /* TODO */
2327 break;
2328
2329 case UAC2_CS_MEM:
2330 /* TODO */
2331 break;
2332
2333 default:
2334 usb_audio_dbg(mixer->chip,
2335 "unknown attribute %d in interrupt\n",
2336 attribute);
2337 break;
2338 } /* switch */
2339 }
2340 }
2341
2342 static void snd_usb_mixer_interrupt(struct urb *urb)
2343 {
2344 struct usb_mixer_interface *mixer = urb->context;
2345 int len = urb->actual_length;
2346 int ustatus = urb->status;
2347
2348 if (ustatus != 0)
2349 goto requeue;
2350
2351 if (mixer->protocol == UAC_VERSION_1) {
2352 struct uac1_status_word *status;
2353
2354 for (status = urb->transfer_buffer;
2355 len >= sizeof(*status);
2356 len -= sizeof(*status), status++) {
2357 dev_dbg(&urb->dev->dev, "status interrupt: %02x %02x\n",
2358 status->bStatusType,
2359 status->bOriginator);
2360
2361 /* ignore any notifications not from the control interface */
2362 if ((status->bStatusType & UAC1_STATUS_TYPE_ORIG_MASK) !=
2363 UAC1_STATUS_TYPE_ORIG_AUDIO_CONTROL_IF)
2364 continue;
2365
2366 if (status->bStatusType & UAC1_STATUS_TYPE_MEM_CHANGED)
2367 snd_usb_mixer_rc_memory_change(mixer, status->bOriginator);
2368 else
2369 snd_usb_mixer_notify_id(mixer, status->bOriginator);
2370 }
2371 } else { /* UAC_VERSION_2 */
2372 struct uac2_interrupt_data_msg *msg;
2373
2374 for (msg = urb->transfer_buffer;
2375 len >= sizeof(*msg);
2376 len -= sizeof(*msg), msg++) {
2377 /* drop vendor specific and endpoint requests */
2378 if ((msg->bInfo & UAC2_INTERRUPT_DATA_MSG_VENDOR) ||
2379 (msg->bInfo & UAC2_INTERRUPT_DATA_MSG_EP))
2380 continue;
2381
2382 snd_usb_mixer_interrupt_v2(mixer, msg->bAttribute,
2383 le16_to_cpu(msg->wValue),
2384 le16_to_cpu(msg->wIndex));
2385 }
2386 }
2387
2388 requeue:
2389 if (ustatus != -ENOENT &&
2390 ustatus != -ECONNRESET &&
2391 ustatus != -ESHUTDOWN) {
2392 urb->dev = mixer->chip->dev;
2393 usb_submit_urb(urb, GFP_ATOMIC);
2394 }
2395 }
2396
2397 /* create the handler for the optional status interrupt endpoint */
2398 static int snd_usb_mixer_status_create(struct usb_mixer_interface *mixer)
2399 {
2400 struct usb_endpoint_descriptor *ep;
2401 void *transfer_buffer;
2402 int buffer_length;
2403 unsigned int epnum;
2404
2405 /* we need one interrupt input endpoint */
2406 if (get_iface_desc(mixer->hostif)->bNumEndpoints < 1)
2407 return 0;
2408 ep = get_endpoint(mixer->hostif, 0);
2409 if (!usb_endpoint_dir_in(ep) || !usb_endpoint_xfer_int(ep))
2410 return 0;
2411
2412 epnum = usb_endpoint_num(ep);
2413 buffer_length = le16_to_cpu(ep->wMaxPacketSize);
2414 transfer_buffer = kmalloc(buffer_length, GFP_KERNEL);
2415 if (!transfer_buffer)
2416 return -ENOMEM;
2417 mixer->urb = usb_alloc_urb(0, GFP_KERNEL);
2418 if (!mixer->urb) {
2419 kfree(transfer_buffer);
2420 return -ENOMEM;
2421 }
2422 usb_fill_int_urb(mixer->urb, mixer->chip->dev,
2423 usb_rcvintpipe(mixer->chip->dev, epnum),
2424 transfer_buffer, buffer_length,
2425 snd_usb_mixer_interrupt, mixer, ep->bInterval);
2426 usb_submit_urb(mixer->urb, GFP_KERNEL);
2427 return 0;
2428 }
2429
2430 int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif,
2431 int ignore_error)
2432 {
2433 static struct snd_device_ops dev_ops = {
2434 .dev_free = snd_usb_mixer_dev_free
2435 };
2436 struct usb_mixer_interface *mixer;
2437 struct snd_info_entry *entry;
2438 int err;
2439
2440 strcpy(chip->card->mixername, "USB Mixer");
2441
2442 mixer = kzalloc(sizeof(*mixer), GFP_KERNEL);
2443 if (!mixer)
2444 return -ENOMEM;
2445 mixer->chip = chip;
2446 mixer->ignore_ctl_error = ignore_error;
2447 mixer->id_elems = kcalloc(MAX_ID_ELEMS, sizeof(*mixer->id_elems),
2448 GFP_KERNEL);
2449 if (!mixer->id_elems) {
2450 kfree(mixer);
2451 return -ENOMEM;
2452 }
2453
2454 mixer->hostif = &usb_ifnum_to_if(chip->dev, ctrlif)->altsetting[0];
2455 switch (get_iface_desc(mixer->hostif)->bInterfaceProtocol) {
2456 case UAC_VERSION_1:
2457 default:
2458 mixer->protocol = UAC_VERSION_1;
2459 break;
2460 case UAC_VERSION_2:
2461 mixer->protocol = UAC_VERSION_2;
2462 break;
2463 }
2464
2465 if ((err = snd_usb_mixer_controls(mixer)) < 0 ||
2466 (err = snd_usb_mixer_status_create(mixer)) < 0)
2467 goto _error;
2468
2469 snd_usb_mixer_apply_create_quirk(mixer);
2470
2471 err = snd_device_new(chip->card, SNDRV_DEV_CODEC, mixer, &dev_ops);
2472 if (err < 0)
2473 goto _error;
2474
2475 if (list_empty(&chip->mixer_list) &&
2476 !snd_card_proc_new(chip->card, "usbmixer", &entry))
2477 snd_info_set_text_ops(entry, chip, snd_usb_mixer_proc_read);
2478
2479 list_add(&mixer->list, &chip->mixer_list);
2480 return 0;
2481
2482 _error:
2483 snd_usb_mixer_free(mixer);
2484 return err;
2485 }
2486
2487 void snd_usb_mixer_disconnect(struct list_head *p)
2488 {
2489 struct usb_mixer_interface *mixer;
2490
2491 mixer = list_entry(p, struct usb_mixer_interface, list);
2492 usb_kill_urb(mixer->urb);
2493 usb_kill_urb(mixer->rc_urb);
2494 }
2495
2496 #ifdef CONFIG_PM
2497 /* stop any bus activity of a mixer */
2498 static void snd_usb_mixer_inactivate(struct usb_mixer_interface *mixer)
2499 {
2500 usb_kill_urb(mixer->urb);
2501 usb_kill_urb(mixer->rc_urb);
2502 }
2503
2504 static int snd_usb_mixer_activate(struct usb_mixer_interface *mixer)
2505 {
2506 int err;
2507
2508 if (mixer->urb) {
2509 err = usb_submit_urb(mixer->urb, GFP_NOIO);
2510 if (err < 0)
2511 return err;
2512 }
2513
2514 return 0;
2515 }
2516
2517 int snd_usb_mixer_suspend(struct usb_mixer_interface *mixer)
2518 {
2519 snd_usb_mixer_inactivate(mixer);
2520 return 0;
2521 }
2522
2523 static int restore_mixer_value(struct usb_mixer_elem_info *cval)
2524 {
2525 int c, err, idx;
2526
2527 if (cval->cmask) {
2528 idx = 0;
2529 for (c = 0; c < MAX_CHANNELS; c++) {
2530 if (!(cval->cmask & (1 << c)))
2531 continue;
2532 if (cval->cached & (1 << c)) {
2533 err = set_cur_mix_value(cval, c + 1, idx,
2534 cval->cache_val[idx]);
2535 if (err < 0)
2536 return err;
2537 }
2538 idx++;
2539 }
2540 } else {
2541 /* master */
2542 if (cval->cached) {
2543 err = set_cur_mix_value(cval, 0, 0, *cval->cache_val);
2544 if (err < 0)
2545 return err;
2546 }
2547 }
2548
2549 return 0;
2550 }
2551
2552 int snd_usb_mixer_resume(struct usb_mixer_interface *mixer, bool reset_resume)
2553 {
2554 struct usb_mixer_elem_info *cval;
2555 int id, err;
2556
2557 /* FIXME: any mixer quirks? */
2558
2559 if (reset_resume) {
2560 /* restore cached mixer values */
2561 for (id = 0; id < MAX_ID_ELEMS; id++) {
2562 for (cval = mixer->id_elems[id]; cval;
2563 cval = cval->next_id_elem) {
2564 err = restore_mixer_value(cval);
2565 if (err < 0)
2566 return err;
2567 }
2568 }
2569 }
2570
2571 return snd_usb_mixer_activate(mixer);
2572 }
2573 #endif
Linux kernel - Deliverables
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