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cifs: update ctime and mtime during truncate
[linux/fpc-iii.git] / sound / usb / mixer.c
blob6913ea27e978ed49190da3ef6318264e67c5fa2b
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/log2.h>
49 #include <linux/slab.h>
50 #include <linux/string.h>
51 #include <linux/usb.h>
52 #include <linux/usb/audio.h>
53 #include <linux/usb/audio-v2.h>
54
55 #include <sound/core.h>
56 #include <sound/control.h>
57 #include <sound/hwdep.h>
58 #include <sound/info.h>
59 #include <sound/tlv.h>
60
61 #include "usbaudio.h"
62 #include "mixer.h"
63 #include "helper.h"
64 #include "mixer_quirks.h"
65 #include "power.h"
66
67 #define MAX_ID_ELEMS 256
68
69 struct usb_audio_term {
70 int id;
71 int type;
72 int channels;
73 unsigned int chconfig;
74 int name;
75 };
76
77 struct usbmix_name_map;
78
79 struct mixer_build {
80 struct snd_usb_audio *chip;
81 struct usb_mixer_interface *mixer;
82 unsigned char *buffer;
83 unsigned int buflen;
84 DECLARE_BITMAP(unitbitmap, MAX_ID_ELEMS);
85 DECLARE_BITMAP(termbitmap, MAX_ID_ELEMS);
86 struct usb_audio_term oterm;
87 const struct usbmix_name_map *map;
88 const struct usbmix_selector_map *selector_map;
89 };
90
91 /*E-mu 0202/0404/0204 eXtension Unit(XU) control*/
92 enum {
93 USB_XU_CLOCK_RATE = 0xe301,
94 USB_XU_CLOCK_SOURCE = 0xe302,
95 USB_XU_DIGITAL_IO_STATUS = 0xe303,
96 USB_XU_DEVICE_OPTIONS = 0xe304,
97 USB_XU_DIRECT_MONITORING = 0xe305,
98 USB_XU_METERING = 0xe306
99 };
100 enum {
101 USB_XU_CLOCK_SOURCE_SELECTOR = 0x02, /* clock source*/
102 USB_XU_CLOCK_RATE_SELECTOR = 0x03, /* clock rate */
103 USB_XU_DIGITAL_FORMAT_SELECTOR = 0x01, /* the spdif format */
104 USB_XU_SOFT_LIMIT_SELECTOR = 0x03 /* soft limiter */
105 };
106
107 /*
108 * manual mapping of mixer names
109 * if the mixer topology is too complicated and the parsed names are
110 * ambiguous, add the entries in usbmixer_maps.c.
111 */
112 #include "mixer_maps.c"
113
114 static const struct usbmix_name_map *
115 find_map(struct mixer_build *state, int unitid, int control)
116 {
117 const struct usbmix_name_map *p = state->map;
118
119 if (!p)
120 return NULL;
121
122 for (p = state->map; p->id; p++) {
123 if (p->id == unitid &&
124 (!control || !p->control || control == p->control))
125 return p;
126 }
127 return NULL;
128 }
129
130 /* get the mapped name if the unit matches */
131 static int
132 check_mapped_name(const struct usbmix_name_map *p, char *buf, int buflen)
133 {
134 if (!p || !p->name)
135 return 0;
136
137 buflen--;
138 return strlcpy(buf, p->name, buflen);
139 }
140
141 /* ignore the error value if ignore_ctl_error flag is set */
142 #define filter_error(cval, err) \
143 ((cval)->head.mixer->ignore_ctl_error ? 0 : (err))
144
145 /* check whether the control should be ignored */
146 static inline int
147 check_ignored_ctl(const struct usbmix_name_map *p)
148 {
149 if (!p || p->name || p->dB)
150 return 0;
151 return 1;
152 }
153
154 /* dB mapping */
155 static inline void check_mapped_dB(const struct usbmix_name_map *p,
156 struct usb_mixer_elem_info *cval)
157 {
158 if (p && p->dB) {
159 cval->dBmin = p->dB->min;
160 cval->dBmax = p->dB->max;
161 cval->initialized = 1;
162 }
163 }
164
165 /* get the mapped selector source name */
166 static int check_mapped_selector_name(struct mixer_build *state, int unitid,
167 int index, char *buf, int buflen)
168 {
169 const struct usbmix_selector_map *p;
170
171 if (!state->selector_map)
172 return 0;
173 for (p = state->selector_map; p->id; p++) {
174 if (p->id == unitid && index < p->count)
175 return strlcpy(buf, p->names[index], buflen);
176 }
177 return 0;
178 }
179
180 /*
181 * find an audio control unit with the given unit id
182 */
183 static void *find_audio_control_unit(struct mixer_build *state,
184 unsigned char unit)
185 {
186 /* we just parse the header */
187 struct uac_feature_unit_descriptor *hdr = NULL;
188
189 while ((hdr = snd_usb_find_desc(state->buffer, state->buflen, hdr,
190 USB_DT_CS_INTERFACE)) != NULL) {
191 if (hdr->bLength >= 4 &&
192 hdr->bDescriptorSubtype >= UAC_INPUT_TERMINAL &&
193 hdr->bDescriptorSubtype <= UAC2_SAMPLE_RATE_CONVERTER &&
194 hdr->bUnitID == unit)
195 return hdr;
196 }
197
198 return NULL;
199 }
200
201 /*
202 * copy a string with the given id
203 */
204 static int snd_usb_copy_string_desc(struct mixer_build *state,
205 int index, char *buf, int maxlen)
206 {
207 int len = usb_string(state->chip->dev, index, buf, maxlen - 1);
208
209 if (len < 0)
210 return 0;
211
212 buf[len] = 0;
213 return len;
214 }
215
216 /*
217 * convert from the byte/word on usb descriptor to the zero-based integer
218 */
219 static int convert_signed_value(struct usb_mixer_elem_info *cval, int val)
220 {
221 switch (cval->val_type) {
222 case USB_MIXER_BOOLEAN:
223 return !!val;
224 case USB_MIXER_INV_BOOLEAN:
225 return !val;
226 case USB_MIXER_U8:
227 val &= 0xff;
228 break;
229 case USB_MIXER_S8:
230 val &= 0xff;
231 if (val >= 0x80)
232 val -= 0x100;
233 break;
234 case USB_MIXER_U16:
235 val &= 0xffff;
236 break;
237 case USB_MIXER_S16:
238 val &= 0xffff;
239 if (val >= 0x8000)
240 val -= 0x10000;
241 break;
242 }
243 return val;
244 }
245
246 /*
247 * convert from the zero-based int to the byte/word for usb descriptor
248 */
249 static int convert_bytes_value(struct usb_mixer_elem_info *cval, int val)
250 {
251 switch (cval->val_type) {
252 case USB_MIXER_BOOLEAN:
253 return !!val;
254 case USB_MIXER_INV_BOOLEAN:
255 return !val;
256 case USB_MIXER_S8:
257 case USB_MIXER_U8:
258 return val & 0xff;
259 case USB_MIXER_S16:
260 case USB_MIXER_U16:
261 return val & 0xffff;
262 }
263 return 0; /* not reached */
264 }
265
266 static int get_relative_value(struct usb_mixer_elem_info *cval, int val)
267 {
268 if (!cval->res)
269 cval->res = 1;
270 if (val < cval->min)
271 return 0;
272 else if (val >= cval->max)
273 return (cval->max - cval->min + cval->res - 1) / cval->res;
274 else
275 return (val - cval->min) / cval->res;
276 }
277
278 static int get_abs_value(struct usb_mixer_elem_info *cval, int val)
279 {
280 if (val < 0)
281 return cval->min;
282 if (!cval->res)
283 cval->res = 1;
284 val *= cval->res;
285 val += cval->min;
286 if (val > cval->max)
287 return cval->max;
288 return val;
289 }
290
291 static int uac2_ctl_value_size(int val_type)
292 {
293 switch (val_type) {
294 case USB_MIXER_S32:
295 case USB_MIXER_U32:
296 return 4;
297 case USB_MIXER_S16:
298 case USB_MIXER_U16:
299 return 2;
300 default:
301 return 1;
302 }
303 return 0; /* unreachable */
304 }
305
306
307 /*
308 * retrieve a mixer value
309 */
310
311 static int get_ctl_value_v1(struct usb_mixer_elem_info *cval, int request,
312 int validx, int *value_ret)
313 {
314 struct snd_usb_audio *chip = cval->head.mixer->chip;
315 unsigned char buf[2];
316 int val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1;
317 int timeout = 10;
318 int idx = 0, err;
319
320 err = snd_usb_lock_shutdown(chip);
321 if (err < 0)
322 return -EIO;
323
324 while (timeout-- > 0) {
325 idx = snd_usb_ctrl_intf(chip) | (cval->head.id << 8);
326 if (snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), request,
327 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
328 validx, idx, buf, val_len) >= val_len) {
329 *value_ret = convert_signed_value(cval, snd_usb_combine_bytes(buf, val_len));
330 err = 0;
331 goto out;
332 }
333 }
334 usb_audio_dbg(chip,
335 "cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n",
336 request, validx, idx, cval->val_type);
337 err = -EINVAL;
338
339 out:
340 snd_usb_unlock_shutdown(chip);
341 return err;
342 }
343
344 static int get_ctl_value_v2(struct usb_mixer_elem_info *cval, int request,
345 int validx, int *value_ret)
346 {
347 struct snd_usb_audio *chip = cval->head.mixer->chip;
348 /* enough space for one range */
349 unsigned char buf[sizeof(__u16) + 3 * sizeof(__u32)];
350 unsigned char *val;
351 int idx = 0, ret, val_size, size;
352 __u8 bRequest;
353
354 val_size = uac2_ctl_value_size(cval->val_type);
355
356 if (request == UAC_GET_CUR) {
357 bRequest = UAC2_CS_CUR;
358 size = val_size;
359 } else {
360 bRequest = UAC2_CS_RANGE;
361 size = sizeof(__u16) + 3 * val_size;
362 }
363
364 memset(buf, 0, sizeof(buf));
365
366 ret = snd_usb_lock_shutdown(chip) ? -EIO : 0;
367 if (ret)
368 goto error;
369
370 idx = snd_usb_ctrl_intf(chip) | (cval->head.id << 8);
371 ret = snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), bRequest,
372 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
373 validx, idx, buf, size);
374 snd_usb_unlock_shutdown(chip);
375
376 if (ret < 0) {
377 error:
378 usb_audio_err(chip,
379 "cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n",
380 request, validx, idx, cval->val_type);
381 return ret;
382 }
383
384 /* FIXME: how should we handle multiple triplets here? */
385
386 switch (request) {
387 case UAC_GET_CUR:
388 val = buf;
389 break;
390 case UAC_GET_MIN:
391 val = buf + sizeof(__u16);
392 break;
393 case UAC_GET_MAX:
394 val = buf + sizeof(__u16) + val_size;
395 break;
396 case UAC_GET_RES:
397 val = buf + sizeof(__u16) + val_size * 2;
398 break;
399 default:
400 return -EINVAL;
401 }
402
403 *value_ret = convert_signed_value(cval,
404 snd_usb_combine_bytes(val, val_size));
405
406 return 0;
407 }
408
409 static int get_ctl_value(struct usb_mixer_elem_info *cval, int request,
410 int validx, int *value_ret)
411 {
412 validx += cval->idx_off;
413
414 return (cval->head.mixer->protocol == UAC_VERSION_1) ?
415 get_ctl_value_v1(cval, request, validx, value_ret) :
416 get_ctl_value_v2(cval, request, validx, value_ret);
417 }
418
419 static int get_cur_ctl_value(struct usb_mixer_elem_info *cval,
420 int validx, int *value)
421 {
422 return get_ctl_value(cval, UAC_GET_CUR, validx, value);
423 }
424
425 /* channel = 0: master, 1 = first channel */
426 static inline int get_cur_mix_raw(struct usb_mixer_elem_info *cval,
427 int channel, int *value)
428 {
429 return get_ctl_value(cval, UAC_GET_CUR,
430 (cval->control << 8) | channel,
431 value);
432 }
433
434 int snd_usb_get_cur_mix_value(struct usb_mixer_elem_info *cval,
435 int channel, int index, int *value)
436 {
437 int err;
438
439 if (cval->cached & (1 << channel)) {
440 *value = cval->cache_val[index];
441 return 0;
442 }
443 err = get_cur_mix_raw(cval, channel, value);
444 if (err < 0) {
445 if (!cval->head.mixer->ignore_ctl_error)
446 usb_audio_dbg(cval->head.mixer->chip,
447 "cannot get current value for control %d ch %d: err = %d\n",
448 cval->control, channel, err);
449 return err;
450 }
451 cval->cached |= 1 << channel;
452 cval->cache_val[index] = *value;
453 return 0;
454 }
455
456 /*
457 * set a mixer value
458 */
459
460 int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval,
461 int request, int validx, int value_set)
462 {
463 struct snd_usb_audio *chip = cval->head.mixer->chip;
464 unsigned char buf[4];
465 int idx = 0, val_len, err, timeout = 10;
466
467 validx += cval->idx_off;
468
469 if (cval->head.mixer->protocol == UAC_VERSION_1) {
470 val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1;
471 } else { /* UAC_VERSION_2 */
472 val_len = uac2_ctl_value_size(cval->val_type);
473
474 /* FIXME */
475 if (request != UAC_SET_CUR) {
476 usb_audio_dbg(chip, "RANGE setting not yet supported\n");
477 return -EINVAL;
478 }
479
480 request = UAC2_CS_CUR;
481 }
482
483 value_set = convert_bytes_value(cval, value_set);
484 buf[0] = value_set & 0xff;
485 buf[1] = (value_set >> 8) & 0xff;
486 buf[2] = (value_set >> 16) & 0xff;
487 buf[3] = (value_set >> 24) & 0xff;
488
489 err = snd_usb_lock_shutdown(chip);
490 if (err < 0)
491 return -EIO;
492
493 while (timeout-- > 0) {
494 idx = snd_usb_ctrl_intf(chip) | (cval->head.id << 8);
495 if (snd_usb_ctl_msg(chip->dev,
496 usb_sndctrlpipe(chip->dev, 0), request,
497 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
498 validx, idx, buf, val_len) >= 0) {
499 err = 0;
500 goto out;
501 }
502 }
503 usb_audio_dbg(chip, "cannot set ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d, data = %#x/%#x\n",
504 request, validx, idx, cval->val_type, buf[0], buf[1]);
505 err = -EINVAL;
506
507 out:
508 snd_usb_unlock_shutdown(chip);
509 return err;
510 }
511
512 static int set_cur_ctl_value(struct usb_mixer_elem_info *cval,
513 int validx, int value)
514 {
515 return snd_usb_mixer_set_ctl_value(cval, UAC_SET_CUR, validx, value);
516 }
517
518 int snd_usb_set_cur_mix_value(struct usb_mixer_elem_info *cval, int channel,
519 int index, int value)
520 {
521 int err;
522 unsigned int read_only = (channel == 0) ?
523 cval->master_readonly :
524 cval->ch_readonly & (1 << (channel - 1));
525
526 if (read_only) {
527 usb_audio_dbg(cval->head.mixer->chip,
528 "%s(): channel %d of control %d is read_only\n",
529 __func__, channel, cval->control);
530 return 0;
531 }
532
533 err = snd_usb_mixer_set_ctl_value(cval,
534 UAC_SET_CUR, (cval->control << 8) | channel,
535 value);
536 if (err < 0)
537 return err;
538 cval->cached |= 1 << channel;
539 cval->cache_val[index] = value;
540 return 0;
541 }
542
543 /*
544 * TLV callback for mixer volume controls
545 */
546 int snd_usb_mixer_vol_tlv(struct snd_kcontrol *kcontrol, int op_flag,
547 unsigned int size, unsigned int __user *_tlv)
548 {
549 struct usb_mixer_elem_info *cval = kcontrol->private_data;
550 DECLARE_TLV_DB_MINMAX(scale, 0, 0);
551
552 if (size < sizeof(scale))
553 return -ENOMEM;
554 if (cval->min_mute)
555 scale[0] = SNDRV_CTL_TLVT_DB_MINMAX_MUTE;
556 scale[2] = cval->dBmin;
557 scale[3] = cval->dBmax;
558 if (copy_to_user(_tlv, scale, sizeof(scale)))
559 return -EFAULT;
560 return 0;
561 }
562
563 /*
564 * parser routines begin here...
565 */
566
567 static int parse_audio_unit(struct mixer_build *state, int unitid);
568
569
570 /*
571 * check if the input/output channel routing is enabled on the given bitmap.
572 * used for mixer unit parser
573 */
574 static int check_matrix_bitmap(unsigned char *bmap,
575 int ich, int och, int num_outs)
576 {
577 int idx = ich * num_outs + och;
578 return bmap[idx >> 3] & (0x80 >> (idx & 7));
579 }
580
581 /*
582 * add an alsa control element
583 * search and increment the index until an empty slot is found.
584 *
585 * if failed, give up and free the control instance.
586 */
587
588 int snd_usb_mixer_add_list(struct usb_mixer_elem_list *list,
589 struct snd_kcontrol *kctl,
590 bool is_std_info)
591 {
592 struct usb_mixer_interface *mixer = list->mixer;
593 int err;
594
595 while (snd_ctl_find_id(mixer->chip->card, &kctl->id))
596 kctl->id.index++;
597 if ((err = snd_ctl_add(mixer->chip->card, kctl)) < 0) {
598 usb_audio_dbg(mixer->chip, "cannot add control (err = %d)\n",
599 err);
600 return err;
601 }
602 list->kctl = kctl;
603 list->is_std_info = is_std_info;
604 list->next_id_elem = mixer->id_elems[list->id];
605 mixer->id_elems[list->id] = list;
606 return 0;
607 }
608
609 /*
610 * get a terminal name string
611 */
612
613 static struct iterm_name_combo {
614 int type;
615 char *name;
616 } iterm_names[] = {
617 { 0x0300, "Output" },
618 { 0x0301, "Speaker" },
619 { 0x0302, "Headphone" },
620 { 0x0303, "HMD Audio" },
621 { 0x0304, "Desktop Speaker" },
622 { 0x0305, "Room Speaker" },
623 { 0x0306, "Com Speaker" },
624 { 0x0307, "LFE" },
625 { 0x0600, "External In" },
626 { 0x0601, "Analog In" },
627 { 0x0602, "Digital In" },
628 { 0x0603, "Line" },
629 { 0x0604, "Legacy In" },
630 { 0x0605, "IEC958 In" },
631 { 0x0606, "1394 DA Stream" },
632 { 0x0607, "1394 DV Stream" },
633 { 0x0700, "Embedded" },
634 { 0x0701, "Noise Source" },
635 { 0x0702, "Equalization Noise" },
636 { 0x0703, "CD" },
637 { 0x0704, "DAT" },
638 { 0x0705, "DCC" },
639 { 0x0706, "MiniDisk" },
640 { 0x0707, "Analog Tape" },
641 { 0x0708, "Phonograph" },
642 { 0x0709, "VCR Audio" },
643 { 0x070a, "Video Disk Audio" },
644 { 0x070b, "DVD Audio" },
645 { 0x070c, "TV Tuner Audio" },
646 { 0x070d, "Satellite Rec Audio" },
647 { 0x070e, "Cable Tuner Audio" },
648 { 0x070f, "DSS Audio" },
649 { 0x0710, "Radio Receiver" },
650 { 0x0711, "Radio Transmitter" },
651 { 0x0712, "Multi-Track Recorder" },
652 { 0x0713, "Synthesizer" },
653 { 0 },
654 };
655
656 static int get_term_name(struct mixer_build *state, struct usb_audio_term *iterm,
657 unsigned char *name, int maxlen, int term_only)
658 {
659 struct iterm_name_combo *names;
660
661 if (iterm->name)
662 return snd_usb_copy_string_desc(state, iterm->name,
663 name, maxlen);
664
665 /* virtual type - not a real terminal */
666 if (iterm->type >> 16) {
667 if (term_only)
668 return 0;
669 switch (iterm->type >> 16) {
670 case UAC_SELECTOR_UNIT:
671 strcpy(name, "Selector");
672 return 8;
673 case UAC1_PROCESSING_UNIT:
674 strcpy(name, "Process Unit");
675 return 12;
676 case UAC1_EXTENSION_UNIT:
677 strcpy(name, "Ext Unit");
678 return 8;
679 case UAC_MIXER_UNIT:
680 strcpy(name, "Mixer");
681 return 5;
682 default:
683 return sprintf(name, "Unit %d", iterm->id);
684 }
685 }
686
687 switch (iterm->type & 0xff00) {
688 case 0x0100:
689 strcpy(name, "PCM");
690 return 3;
691 case 0x0200:
692 strcpy(name, "Mic");
693 return 3;
694 case 0x0400:
695 strcpy(name, "Headset");
696 return 7;
697 case 0x0500:
698 strcpy(name, "Phone");
699 return 5;
700 }
701
702 for (names = iterm_names; names->type; names++) {
703 if (names->type == iterm->type) {
704 strcpy(name, names->name);
705 return strlen(names->name);
706 }
707 }
708
709 return 0;
710 }
711
712 /*
713 * parse the source unit recursively until it reaches to a terminal
714 * or a branched unit.
715 */
716 static int __check_input_term(struct mixer_build *state, int id,
717 struct usb_audio_term *term)
718 {
719 int err;
720 void *p1;
721 unsigned char *hdr;
722
723 memset(term, 0, sizeof(*term));
724 for (;;) {
725 /* a loop in the terminal chain? */
726 if (test_and_set_bit(id, state->termbitmap))
727 return -EINVAL;
728
729 p1 = find_audio_control_unit(state, id);
730 if (!p1)
731 break;
732
733 hdr = p1;
734 term->id = id;
735 switch (hdr[2]) {
736 case UAC_INPUT_TERMINAL:
737 if (state->mixer->protocol == UAC_VERSION_1) {
738 struct uac_input_terminal_descriptor *d = p1;
739 term->type = le16_to_cpu(d->wTerminalType);
740 term->channels = d->bNrChannels;
741 term->chconfig = le16_to_cpu(d->wChannelConfig);
742 term->name = d->iTerminal;
743 } else { /* UAC_VERSION_2 */
744 struct uac2_input_terminal_descriptor *d = p1;
745
746 /* call recursively to verify that the
747 * referenced clock entity is valid */
748 err = __check_input_term(state, d->bCSourceID, term);
749 if (err < 0)
750 return err;
751
752 /* save input term properties after recursion,
753 * to ensure they are not overriden by the
754 * recursion calls */
755 term->id = id;
756 term->type = le16_to_cpu(d->wTerminalType);
757 term->channels = d->bNrChannels;
758 term->chconfig = le32_to_cpu(d->bmChannelConfig);
759 term->name = d->iTerminal;
760 }
761 return 0;
762 case UAC_FEATURE_UNIT: {
763 /* the header is the same for v1 and v2 */
764 struct uac_feature_unit_descriptor *d = p1;
765 id = d->bSourceID;
766 break; /* continue to parse */
767 }
768 case UAC_MIXER_UNIT: {
769 struct uac_mixer_unit_descriptor *d = p1;
770 term->type = d->bDescriptorSubtype << 16; /* virtual type */
771 term->channels = uac_mixer_unit_bNrChannels(d);
772 term->chconfig = uac_mixer_unit_wChannelConfig(d, state->mixer->protocol);
773 term->name = uac_mixer_unit_iMixer(d);
774 return 0;
775 }
776 case UAC_SELECTOR_UNIT:
777 case UAC2_CLOCK_SELECTOR: {
778 struct uac_selector_unit_descriptor *d = p1;
779 /* call recursively to retrieve the channel info */
780 err = __check_input_term(state, d->baSourceID[0], term);
781 if (err < 0)
782 return err;
783 term->type = d->bDescriptorSubtype << 16; /* virtual type */
784 term->id = id;
785 term->name = uac_selector_unit_iSelector(d);
786 return 0;
787 }
788 case UAC1_PROCESSING_UNIT:
789 case UAC1_EXTENSION_UNIT:
790 /* UAC2_PROCESSING_UNIT_V2 */
791 /* UAC2_EFFECT_UNIT */
792 case UAC2_EXTENSION_UNIT_V2: {
793 struct uac_processing_unit_descriptor *d = p1;
794
795 if (state->mixer->protocol == UAC_VERSION_2 &&
796 hdr[2] == UAC2_EFFECT_UNIT) {
797 /* UAC2/UAC1 unit IDs overlap here in an
798 * uncompatible way. Ignore this unit for now.
799 */
800 return 0;
801 }
802
803 if (d->bNrInPins) {
804 id = d->baSourceID[0];
805 break; /* continue to parse */
806 }
807 term->type = d->bDescriptorSubtype << 16; /* virtual type */
808 term->channels = uac_processing_unit_bNrChannels(d);
809 term->chconfig = uac_processing_unit_wChannelConfig(d, state->mixer->protocol);
810 term->name = uac_processing_unit_iProcessing(d, state->mixer->protocol);
811 return 0;
812 }
813 case UAC2_CLOCK_SOURCE: {
814 struct uac_clock_source_descriptor *d = p1;
815 term->type = d->bDescriptorSubtype << 16; /* virtual type */
816 term->id = id;
817 term->name = d->iClockSource;
818 return 0;
819 }
820 default:
821 return -ENODEV;
822 }
823 }
824 return -ENODEV;
825 }
826
827
828 static int check_input_term(struct mixer_build *state, int id,
829 struct usb_audio_term *term)
830 {
831 memset(term, 0, sizeof(*term));
832 memset(state->termbitmap, 0, sizeof(state->termbitmap));
833 return __check_input_term(state, id, term);
834 }
835
836 /*
837 * Feature Unit
838 */
839
840 /* feature unit control information */
841 struct usb_feature_control_info {
842 const char *name;
843 int type; /* data type for uac1 */
844 int type_uac2; /* data type for uac2 if different from uac1, else -1 */
845 };
846
847 static struct usb_feature_control_info audio_feature_info[] = {
848 { "Mute", USB_MIXER_INV_BOOLEAN, -1 },
849 { "Volume", USB_MIXER_S16, -1 },
850 { "Tone Control - Bass", USB_MIXER_S8, -1 },
851 { "Tone Control - Mid", USB_MIXER_S8, -1 },
852 { "Tone Control - Treble", USB_MIXER_S8, -1 },
853 { "Graphic Equalizer", USB_MIXER_S8, -1 }, /* FIXME: not implemeted yet */
854 { "Auto Gain Control", USB_MIXER_BOOLEAN, -1 },
855 { "Delay Control", USB_MIXER_U16, USB_MIXER_U32 },
856 { "Bass Boost", USB_MIXER_BOOLEAN, -1 },
857 { "Loudness", USB_MIXER_BOOLEAN, -1 },
858 /* UAC2 specific */
859 { "Input Gain Control", USB_MIXER_S16, -1 },
860 { "Input Gain Pad Control", USB_MIXER_S16, -1 },
861 { "Phase Inverter Control", USB_MIXER_BOOLEAN, -1 },
862 };
863
864 /* private_free callback */
865 void snd_usb_mixer_elem_free(struct snd_kcontrol *kctl)
866 {
867 kfree(kctl->private_data);
868 kctl->private_data = NULL;
869 }
870
871 /*
872 * interface to ALSA control for feature/mixer units
873 */
874
875 /* volume control quirks */
876 static void volume_control_quirks(struct usb_mixer_elem_info *cval,
877 struct snd_kcontrol *kctl)
878 {
879 struct snd_usb_audio *chip = cval->head.mixer->chip;
880 switch (chip->usb_id) {
881 case USB_ID(0x0763, 0x2030): /* M-Audio Fast Track C400 */
882 case USB_ID(0x0763, 0x2031): /* M-Audio Fast Track C600 */
883 if (strcmp(kctl->id.name, "Effect Duration") == 0) {
884 cval->min = 0x0000;
885 cval->max = 0xffff;
886 cval->res = 0x00e6;
887 break;
888 }
889 if (strcmp(kctl->id.name, "Effect Volume") == 0 ||
890 strcmp(kctl->id.name, "Effect Feedback Volume") == 0) {
891 cval->min = 0x00;
892 cval->max = 0xff;
893 break;
894 }
895 if (strstr(kctl->id.name, "Effect Return") != NULL) {
896 cval->min = 0xb706;
897 cval->max = 0xff7b;
898 cval->res = 0x0073;
899 break;
900 }
901 if ((strstr(kctl->id.name, "Playback Volume") != NULL) ||
902 (strstr(kctl->id.name, "Effect Send") != NULL)) {
903 cval->min = 0xb5fb; /* -73 dB = 0xb6ff */
904 cval->max = 0xfcfe;
905 cval->res = 0x0073;
906 }
907 break;
908
909 case USB_ID(0x0763, 0x2081): /* M-Audio Fast Track Ultra 8R */
910 case USB_ID(0x0763, 0x2080): /* M-Audio Fast Track Ultra */
911 if (strcmp(kctl->id.name, "Effect Duration") == 0) {
912 usb_audio_info(chip,
913 "set quirk for FTU Effect Duration\n");
914 cval->min = 0x0000;
915 cval->max = 0x7f00;
916 cval->res = 0x0100;
917 break;
918 }
919 if (strcmp(kctl->id.name, "Effect Volume") == 0 ||
920 strcmp(kctl->id.name, "Effect Feedback Volume") == 0) {
921 usb_audio_info(chip,
922 "set quirks for FTU Effect Feedback/Volume\n");
923 cval->min = 0x00;
924 cval->max = 0x7f;
925 break;
926 }
927 break;
928
929 case USB_ID(0x0d8c, 0x0103):
930 if (!strcmp(kctl->id.name, "PCM Playback Volume")) {
931 usb_audio_info(chip,
932 "set volume quirk for CM102-A+/102S+\n");
933 cval->min = -256;
934 }
935 break;
936
937 case USB_ID(0x0471, 0x0101):
938 case USB_ID(0x0471, 0x0104):
939 case USB_ID(0x0471, 0x0105):
940 case USB_ID(0x0672, 0x1041):
941 /* quirk for UDA1321/N101.
942 * note that detection between firmware 2.1.1.7 (N101)
943 * and later 2.1.1.21 is not very clear from datasheets.
944 * I hope that the min value is -15360 for newer firmware --jk
945 */
946 if (!strcmp(kctl->id.name, "PCM Playback Volume") &&
947 cval->min == -15616) {
948 usb_audio_info(chip,
949 "set volume quirk for UDA1321/N101 chip\n");
950 cval->max = -256;
951 }
952 break;
953
954 case USB_ID(0x046d, 0x09a4):
955 if (!strcmp(kctl->id.name, "Mic Capture Volume")) {
956 usb_audio_info(chip,
957 "set volume quirk for QuickCam E3500\n");
958 cval->min = 6080;
959 cval->max = 8768;
960 cval->res = 192;
961 }
962 break;
963
964 case USB_ID(0x046d, 0x0807): /* Logitech Webcam C500 */
965 case USB_ID(0x046d, 0x0808):
966 case USB_ID(0x046d, 0x0809):
967 case USB_ID(0x046d, 0x0819): /* Logitech Webcam C210 */
968 case USB_ID(0x046d, 0x081b): /* HD Webcam c310 */
969 case USB_ID(0x046d, 0x081d): /* HD Webcam c510 */
970 case USB_ID(0x046d, 0x0825): /* HD Webcam c270 */
971 case USB_ID(0x046d, 0x0826): /* HD Webcam c525 */
972 case USB_ID(0x046d, 0x08ca): /* Logitech Quickcam Fusion */
973 case USB_ID(0x046d, 0x0991):
974 case USB_ID(0x046d, 0x09a2): /* QuickCam Communicate Deluxe/S7500 */
975 /* Most audio usb devices lie about volume resolution.
976 * Most Logitech webcams have res = 384.
977 * Probably there is some logitech magic behind this number --fishor
978 */
979 if (!strcmp(kctl->id.name, "Mic Capture Volume")) {
980 usb_audio_info(chip,
981 "set resolution quirk: cval->res = 384\n");
982 cval->res = 384;
983 }
984 break;
985 case USB_ID(0x0495, 0x3042): /* ESS Technology Asus USB DAC */
986 if ((strstr(kctl->id.name, "Playback Volume") != NULL) ||
987 strstr(kctl->id.name, "Capture Volume") != NULL) {
988 cval->min >>= 8;
989 cval->max = 0;
990 cval->res = 1;
991 }
992 break;
993 }
994 }
995
996 /*
997 * retrieve the minimum and maximum values for the specified control
998 */
999 static int get_min_max_with_quirks(struct usb_mixer_elem_info *cval,
1000 int default_min, struct snd_kcontrol *kctl)
1001 {
1002 /* for failsafe */
1003 cval->min = default_min;
1004 cval->max = cval->min + 1;
1005 cval->res = 1;
1006 cval->dBmin = cval->dBmax = 0;
1007
1008 if (cval->val_type == USB_MIXER_BOOLEAN ||
1009 cval->val_type == USB_MIXER_INV_BOOLEAN) {
1010 cval->initialized = 1;
1011 } else {
1012 int minchn = 0;
1013 if (cval->cmask) {
1014 int i;
1015 for (i = 0; i < MAX_CHANNELS; i++)
1016 if (cval->cmask & (1 << i)) {
1017 minchn = i + 1;
1018 break;
1019 }
1020 }
1021 if (get_ctl_value(cval, UAC_GET_MAX, (cval->control << 8) | minchn, &cval->max) < 0 ||
1022 get_ctl_value(cval, UAC_GET_MIN, (cval->control << 8) | minchn, &cval->min) < 0) {
1023 usb_audio_err(cval->head.mixer->chip,
1024 "%d:%d: cannot get min/max values for control %d (id %d)\n",
1025 cval->head.id, snd_usb_ctrl_intf(cval->head.mixer->chip),
1026 cval->control, cval->head.id);
1027 return -EINVAL;
1028 }
1029 if (get_ctl_value(cval, UAC_GET_RES,
1030 (cval->control << 8) | minchn,
1031 &cval->res) < 0) {
1032 cval->res = 1;
1033 } else {
1034 int last_valid_res = cval->res;
1035
1036 while (cval->res > 1) {
1037 if (snd_usb_mixer_set_ctl_value(cval, UAC_SET_RES,
1038 (cval->control << 8) | minchn,
1039 cval->res / 2) < 0)
1040 break;
1041 cval->res /= 2;
1042 }
1043 if (get_ctl_value(cval, UAC_GET_RES,
1044 (cval->control << 8) | minchn, &cval->res) < 0)
1045 cval->res = last_valid_res;
1046 }
1047 if (cval->res == 0)
1048 cval->res = 1;
1049
1050 /* Additional checks for the proper resolution
1051 *
1052 * Some devices report smaller resolutions than actually
1053 * reacting. They don't return errors but simply clip
1054 * to the lower aligned value.
1055 */
1056 if (cval->min + cval->res < cval->max) {
1057 int last_valid_res = cval->res;
1058 int saved, test, check;
1059 if (get_cur_mix_raw(cval, minchn, &saved) < 0)
1060 goto no_res_check;
1061 for (;;) {
1062 test = saved;
1063 if (test < cval->max)
1064 test += cval->res;
1065 else
1066 test -= cval->res;
1067 if (test < cval->min || test > cval->max ||
1068 snd_usb_set_cur_mix_value(cval, minchn, 0, test) ||
1069 get_cur_mix_raw(cval, minchn, &check)) {
1070 cval->res = last_valid_res;
1071 break;
1072 }
1073 if (test == check)
1074 break;
1075 cval->res *= 2;
1076 }
1077 snd_usb_set_cur_mix_value(cval, minchn, 0, saved);
1078 }
1079
1080 no_res_check:
1081 cval->initialized = 1;
1082 }
1083
1084 if (kctl)
1085 volume_control_quirks(cval, kctl);
1086
1087 /* USB descriptions contain the dB scale in 1/256 dB unit
1088 * while ALSA TLV contains in 1/100 dB unit
1089 */
1090 cval->dBmin = (convert_signed_value(cval, cval->min) * 100) / 256;
1091 cval->dBmax = (convert_signed_value(cval, cval->max) * 100) / 256;
1092 if (cval->dBmin > cval->dBmax) {
1093 /* something is wrong; assume it's either from/to 0dB */
1094 if (cval->dBmin < 0)
1095 cval->dBmax = 0;
1096 else if (cval->dBmin > 0)
1097 cval->dBmin = 0;
1098 if (cval->dBmin > cval->dBmax) {
1099 /* totally crap, return an error */
1100 return -EINVAL;
1101 }
1102 }
1103
1104 return 0;
1105 }
1106
1107 #define get_min_max(cval, def) get_min_max_with_quirks(cval, def, NULL)
1108
1109 /* get a feature/mixer unit info */
1110 static int mixer_ctl_feature_info(struct snd_kcontrol *kcontrol,
1111 struct snd_ctl_elem_info *uinfo)
1112 {
1113 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1114
1115 if (cval->val_type == USB_MIXER_BOOLEAN ||
1116 cval->val_type == USB_MIXER_INV_BOOLEAN)
1117 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1118 else
1119 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
1120 uinfo->count = cval->channels;
1121 if (cval->val_type == USB_MIXER_BOOLEAN ||
1122 cval->val_type == USB_MIXER_INV_BOOLEAN) {
1123 uinfo->value.integer.min = 0;
1124 uinfo->value.integer.max = 1;
1125 } else {
1126 if (!cval->initialized) {
1127 get_min_max_with_quirks(cval, 0, kcontrol);
1128 if (cval->initialized && cval->dBmin >= cval->dBmax) {
1129 kcontrol->vd[0].access &=
1130 ~(SNDRV_CTL_ELEM_ACCESS_TLV_READ |
1131 SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK);
1132 snd_ctl_notify(cval->head.mixer->chip->card,
1133 SNDRV_CTL_EVENT_MASK_INFO,
1134 &kcontrol->id);
1135 }
1136 }
1137 uinfo->value.integer.min = 0;
1138 uinfo->value.integer.max =
1139 (cval->max - cval->min + cval->res - 1) / cval->res;
1140 }
1141 return 0;
1142 }
1143
1144 /* get the current value from feature/mixer unit */
1145 static int mixer_ctl_feature_get(struct snd_kcontrol *kcontrol,
1146 struct snd_ctl_elem_value *ucontrol)
1147 {
1148 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1149 int c, cnt, val, err;
1150
1151 ucontrol->value.integer.value[0] = cval->min;
1152 if (cval->cmask) {
1153 cnt = 0;
1154 for (c = 0; c < MAX_CHANNELS; c++) {
1155 if (!(cval->cmask & (1 << c)))
1156 continue;
1157 err = snd_usb_get_cur_mix_value(cval, c + 1, cnt, &val);
1158 if (err < 0)
1159 return filter_error(cval, err);
1160 val = get_relative_value(cval, val);
1161 ucontrol->value.integer.value[cnt] = val;
1162 cnt++;
1163 }
1164 return 0;
1165 } else {
1166 /* master channel */
1167 err = snd_usb_get_cur_mix_value(cval, 0, 0, &val);
1168 if (err < 0)
1169 return filter_error(cval, err);
1170 val = get_relative_value(cval, val);
1171 ucontrol->value.integer.value[0] = val;
1172 }
1173 return 0;
1174 }
1175
1176 /* put the current value to feature/mixer unit */
1177 static int mixer_ctl_feature_put(struct snd_kcontrol *kcontrol,
1178 struct snd_ctl_elem_value *ucontrol)
1179 {
1180 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1181 int c, cnt, val, oval, err;
1182 int changed = 0;
1183
1184 if (cval->cmask) {
1185 cnt = 0;
1186 for (c = 0; c < MAX_CHANNELS; c++) {
1187 if (!(cval->cmask & (1 << c)))
1188 continue;
1189 err = snd_usb_get_cur_mix_value(cval, c + 1, cnt, &oval);
1190 if (err < 0)
1191 return filter_error(cval, err);
1192 val = ucontrol->value.integer.value[cnt];
1193 val = get_abs_value(cval, val);
1194 if (oval != val) {
1195 snd_usb_set_cur_mix_value(cval, c + 1, cnt, val);
1196 changed = 1;
1197 }
1198 cnt++;
1199 }
1200 } else {
1201 /* master channel */
1202 err = snd_usb_get_cur_mix_value(cval, 0, 0, &oval);
1203 if (err < 0)
1204 return filter_error(cval, err);
1205 val = ucontrol->value.integer.value[0];
1206 val = get_abs_value(cval, val);
1207 if (val != oval) {
1208 snd_usb_set_cur_mix_value(cval, 0, 0, val);
1209 changed = 1;
1210 }
1211 }
1212 return changed;
1213 }
1214
1215 static struct snd_kcontrol_new usb_feature_unit_ctl = {
1216 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1217 .name = "", /* will be filled later manually */
1218 .info = mixer_ctl_feature_info,
1219 .get = mixer_ctl_feature_get,
1220 .put = mixer_ctl_feature_put,
1221 };
1222
1223 /* the read-only variant */
1224 static struct snd_kcontrol_new usb_feature_unit_ctl_ro = {
1225 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1226 .name = "", /* will be filled later manually */
1227 .info = mixer_ctl_feature_info,
1228 .get = mixer_ctl_feature_get,
1229 .put = NULL,
1230 };
1231
1232 /*
1233 * This symbol is exported in order to allow the mixer quirks to
1234 * hook up to the standard feature unit control mechanism
1235 */
1236 struct snd_kcontrol_new *snd_usb_feature_unit_ctl = &usb_feature_unit_ctl;
1237
1238 /*
1239 * build a feature control
1240 */
1241 static size_t append_ctl_name(struct snd_kcontrol *kctl, const char *str)
1242 {
1243 return strlcat(kctl->id.name, str, sizeof(kctl->id.name));
1244 }
1245
1246 /*
1247 * A lot of headsets/headphones have a "Speaker" mixer. Make sure we
1248 * rename it to "Headphone". We determine if something is a headphone
1249 * similar to how udev determines form factor.
1250 */
1251 static void check_no_speaker_on_headset(struct snd_kcontrol *kctl,
1252 struct snd_card *card)
1253 {
1254 const char *names_to_check[] = {
1255 "Headset", "headset", "Headphone", "headphone", NULL};
1256 const char **s;
1257 bool found = false;
1258
1259 if (strcmp("Speaker", kctl->id.name))
1260 return;
1261
1262 for (s = names_to_check; *s; s++)
1263 if (strstr(card->shortname, *s)) {
1264 found = true;
1265 break;
1266 }
1267
1268 if (!found)
1269 return;
1270
1271 strlcpy(kctl->id.name, "Headphone", sizeof(kctl->id.name));
1272 }
1273
1274 static void build_feature_ctl(struct mixer_build *state, void *raw_desc,
1275 unsigned int ctl_mask, int control,
1276 struct usb_audio_term *iterm, int unitid,
1277 int readonly_mask)
1278 {
1279 struct uac_feature_unit_descriptor *desc = raw_desc;
1280 struct usb_feature_control_info *ctl_info;
1281 unsigned int len = 0;
1282 int mapped_name = 0;
1283 int nameid = uac_feature_unit_iFeature(desc);
1284 struct snd_kcontrol *kctl;
1285 struct usb_mixer_elem_info *cval;
1286 const struct usbmix_name_map *map;
1287 unsigned int range;
1288
1289 control++; /* change from zero-based to 1-based value */
1290
1291 if (control == UAC_FU_GRAPHIC_EQUALIZER) {
1292 /* FIXME: not supported yet */
1293 return;
1294 }
1295
1296 map = find_map(state, unitid, control);
1297 if (check_ignored_ctl(map))
1298 return;
1299
1300 cval = kzalloc(sizeof(*cval), GFP_KERNEL);
1301 if (!cval)
1302 return;
1303 snd_usb_mixer_elem_init_std(&cval->head, state->mixer, unitid);
1304 cval->control = control;
1305 cval->cmask = ctl_mask;
1306 ctl_info = &audio_feature_info[control-1];
1307 if (state->mixer->protocol == UAC_VERSION_1)
1308 cval->val_type = ctl_info->type;
1309 else /* UAC_VERSION_2 */
1310 cval->val_type = ctl_info->type_uac2 >= 0 ?
1311 ctl_info->type_uac2 : ctl_info->type;
1312
1313 if (ctl_mask == 0) {
1314 cval->channels = 1; /* master channel */
1315 cval->master_readonly = readonly_mask;
1316 } else {
1317 int i, c = 0;
1318 for (i = 0; i < 16; i++)
1319 if (ctl_mask & (1 << i))
1320 c++;
1321 cval->channels = c;
1322 cval->ch_readonly = readonly_mask;
1323 }
1324
1325 /*
1326 * If all channels in the mask are marked read-only, make the control
1327 * read-only. snd_usb_set_cur_mix_value() will check the mask again and won't
1328 * issue write commands to read-only channels.
1329 */
1330 if (cval->channels == readonly_mask)
1331 kctl = snd_ctl_new1(&usb_feature_unit_ctl_ro, cval);
1332 else
1333 kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval);
1334
1335 if (!kctl) {
1336 usb_audio_err(state->chip, "cannot malloc kcontrol\n");
1337 kfree(cval);
1338 return;
1339 }
1340 kctl->private_free = snd_usb_mixer_elem_free;
1341
1342 len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name));
1343 mapped_name = len != 0;
1344 if (!len && nameid)
1345 len = snd_usb_copy_string_desc(state, nameid,
1346 kctl->id.name, sizeof(kctl->id.name));
1347
1348 switch (control) {
1349 case UAC_FU_MUTE:
1350 case UAC_FU_VOLUME:
1351 /*
1352 * determine the control name. the rule is:
1353 * - if a name id is given in descriptor, use it.
1354 * - if the connected input can be determined, then use the name
1355 * of terminal type.
1356 * - if the connected output can be determined, use it.
1357 * - otherwise, anonymous name.
1358 */
1359 if (!len) {
1360 len = get_term_name(state, iterm, kctl->id.name,
1361 sizeof(kctl->id.name), 1);
1362 if (!len)
1363 len = get_term_name(state, &state->oterm,
1364 kctl->id.name,
1365 sizeof(kctl->id.name), 1);
1366 if (!len)
1367 snprintf(kctl->id.name, sizeof(kctl->id.name),
1368 "Feature %d", unitid);
1369 }
1370
1371 if (!mapped_name)
1372 check_no_speaker_on_headset(kctl, state->mixer->chip->card);
1373
1374 /*
1375 * determine the stream direction:
1376 * if the connected output is USB stream, then it's likely a
1377 * capture stream. otherwise it should be playback (hopefully :)
1378 */
1379 if (!mapped_name && !(state->oterm.type >> 16)) {
1380 if ((state->oterm.type & 0xff00) == 0x0100)
1381 append_ctl_name(kctl, " Capture");
1382 else
1383 append_ctl_name(kctl, " Playback");
1384 }
1385 append_ctl_name(kctl, control == UAC_FU_MUTE ?
1386 " Switch" : " Volume");
1387 break;
1388 default:
1389 if (!len)
1390 strlcpy(kctl->id.name, audio_feature_info[control-1].name,
1391 sizeof(kctl->id.name));
1392 break;
1393 }
1394
1395 /* get min/max values */
1396 get_min_max_with_quirks(cval, 0, kctl);
1397
1398 if (control == UAC_FU_VOLUME) {
1399 check_mapped_dB(map, cval);
1400 if (cval->dBmin < cval->dBmax || !cval->initialized) {
1401 kctl->tlv.c = snd_usb_mixer_vol_tlv;
1402 kctl->vd[0].access |=
1403 SNDRV_CTL_ELEM_ACCESS_TLV_READ |
1404 SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK;
1405 }
1406 }
1407
1408 snd_usb_mixer_fu_apply_quirk(state->mixer, cval, unitid, kctl);
1409
1410 range = (cval->max - cval->min) / cval->res;
1411 /*
1412 * Are there devices with volume range more than 255? I use a bit more
1413 * to be sure. 384 is a resolution magic number found on Logitech
1414 * devices. It will definitively catch all buggy Logitech devices.
1415 */
1416 if (range > 384) {
1417 usb_audio_warn(state->chip,
1418 "Warning! Unlikely big volume range (=%u), cval->res is probably wrong.",
1419 range);
1420 usb_audio_warn(state->chip,
1421 "[%d] FU [%s] ch = %d, val = %d/%d/%d",
1422 cval->head.id, kctl->id.name, cval->channels,
1423 cval->min, cval->max, cval->res);
1424 }
1425
1426 usb_audio_dbg(state->chip, "[%d] FU [%s] ch = %d, val = %d/%d/%d\n",
1427 cval->head.id, kctl->id.name, cval->channels,
1428 cval->min, cval->max, cval->res);
1429 snd_usb_mixer_add_control(&cval->head, kctl);
1430 }
1431
1432 static int parse_clock_source_unit(struct mixer_build *state, int unitid,
1433 void *_ftr)
1434 {
1435 struct uac_clock_source_descriptor *hdr = _ftr;
1436 struct usb_mixer_elem_info *cval;
1437 struct snd_kcontrol *kctl;
1438 char name[SNDRV_CTL_ELEM_ID_NAME_MAXLEN];
1439 int ret;
1440
1441 if (state->mixer->protocol != UAC_VERSION_2)
1442 return -EINVAL;
1443
1444 if (hdr->bLength != sizeof(*hdr)) {
1445 usb_audio_dbg(state->chip,
1446 "Bogus clock source descriptor length of %d, ignoring.\n",
1447 hdr->bLength);
1448 return 0;
1449 }
1450
1451 /*
1452 * The only property of this unit we are interested in is the
1453 * clock source validity. If that isn't readable, just bail out.
1454 */
1455 if (!uac2_control_is_readable(hdr->bmControls,
1456 ilog2(UAC2_CS_CONTROL_CLOCK_VALID)))
1457 return 0;
1458
1459 cval = kzalloc(sizeof(*cval), GFP_KERNEL);
1460 if (!cval)
1461 return -ENOMEM;
1462
1463 snd_usb_mixer_elem_init_std(&cval->head, state->mixer, hdr->bClockID);
1464
1465 cval->min = 0;
1466 cval->max = 1;
1467 cval->channels = 1;
1468 cval->val_type = USB_MIXER_BOOLEAN;
1469 cval->control = UAC2_CS_CONTROL_CLOCK_VALID;
1470
1471 if (uac2_control_is_writeable(hdr->bmControls,
1472 ilog2(UAC2_CS_CONTROL_CLOCK_VALID)))
1473 kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval);
1474 else {
1475 cval->master_readonly = 1;
1476 kctl = snd_ctl_new1(&usb_feature_unit_ctl_ro, cval);
1477 }
1478
1479 if (!kctl) {
1480 kfree(cval);
1481 return -ENOMEM;
1482 }
1483
1484 kctl->private_free = snd_usb_mixer_elem_free;
1485 ret = snd_usb_copy_string_desc(state, hdr->iClockSource,
1486 name, sizeof(name));
1487 if (ret > 0)
1488 snprintf(kctl->id.name, sizeof(kctl->id.name),
1489 "%s Validity", name);
1490 else
1491 snprintf(kctl->id.name, sizeof(kctl->id.name),
1492 "Clock Source %d Validity", hdr->bClockID);
1493
1494 return snd_usb_mixer_add_control(&cval->head, kctl);
1495 }
1496
1497 /*
1498 * parse a feature unit
1499 *
1500 * most of controls are defined here.
1501 */
1502 static int parse_audio_feature_unit(struct mixer_build *state, int unitid,
1503 void *_ftr)
1504 {
1505 int channels, i, j;
1506 struct usb_audio_term iterm;
1507 unsigned int master_bits, first_ch_bits;
1508 int err, csize;
1509 struct uac_feature_unit_descriptor *hdr = _ftr;
1510 __u8 *bmaControls;
1511
1512 if (state->mixer->protocol == UAC_VERSION_1) {
1513 if (hdr->bLength < 7) {
1514 usb_audio_err(state->chip,
1515 "unit %u: invalid UAC_FEATURE_UNIT descriptor\n",
1516 unitid);
1517 return -EINVAL;
1518 }
1519 csize = hdr->bControlSize;
1520 if (!csize) {
1521 usb_audio_dbg(state->chip,
1522 "unit %u: invalid bControlSize == 0\n",
1523 unitid);
1524 return -EINVAL;
1525 }
1526 channels = (hdr->bLength - 7) / csize - 1;
1527 bmaControls = hdr->bmaControls;
1528 if (hdr->bLength < 7 + csize) {
1529 usb_audio_err(state->chip,
1530 "unit %u: invalid UAC_FEATURE_UNIT descriptor\n",
1531 unitid);
1532 return -EINVAL;
1533 }
1534 } else {
1535 struct uac2_feature_unit_descriptor *ftr = _ftr;
1536 if (hdr->bLength < 6) {
1537 usb_audio_err(state->chip,
1538 "unit %u: invalid UAC_FEATURE_UNIT descriptor\n",
1539 unitid);
1540 return -EINVAL;
1541 }
1542 csize = 4;
1543 channels = (hdr->bLength - 6) / 4 - 1;
1544 bmaControls = ftr->bmaControls;
1545 if (hdr->bLength < 6 + csize) {
1546 usb_audio_err(state->chip,
1547 "unit %u: invalid UAC_FEATURE_UNIT descriptor\n",
1548 unitid);
1549 return -EINVAL;
1550 }
1551 }
1552
1553 /* parse the source unit */
1554 if ((err = parse_audio_unit(state, hdr->bSourceID)) < 0)
1555 return err;
1556
1557 /* determine the input source type and name */
1558 err = check_input_term(state, hdr->bSourceID, &iterm);
1559 if (err < 0)
1560 return err;
1561
1562 master_bits = snd_usb_combine_bytes(bmaControls, csize);
1563 /* master configuration quirks */
1564 switch (state->chip->usb_id) {
1565 case USB_ID(0x08bb, 0x2702):
1566 usb_audio_info(state->chip,
1567 "usbmixer: master volume quirk for PCM2702 chip\n");
1568 /* disable non-functional volume control */
1569 master_bits &= ~UAC_CONTROL_BIT(UAC_FU_VOLUME);
1570 break;
1571 case USB_ID(0x1130, 0xf211):
1572 usb_audio_info(state->chip,
1573 "usbmixer: volume control quirk for Tenx TP6911 Audio Headset\n");
1574 /* disable non-functional volume control */
1575 channels = 0;
1576 break;
1577
1578 }
1579 if (channels > 0)
1580 first_ch_bits = snd_usb_combine_bytes(bmaControls + csize, csize);
1581 else
1582 first_ch_bits = 0;
1583
1584 if (state->mixer->protocol == UAC_VERSION_1) {
1585 /* check all control types */
1586 for (i = 0; i < 10; i++) {
1587 unsigned int ch_bits = 0;
1588 for (j = 0; j < channels; j++) {
1589 unsigned int mask;
1590
1591 mask = snd_usb_combine_bytes(bmaControls +
1592 csize * (j+1), csize);
1593 if (mask & (1 << i))
1594 ch_bits |= (1 << j);
1595 }
1596 /* audio class v1 controls are never read-only */
1597
1598 /*
1599 * The first channel must be set
1600 * (for ease of programming).
1601 */
1602 if (ch_bits & 1)
1603 build_feature_ctl(state, _ftr, ch_bits, i,
1604 &iterm, unitid, 0);
1605 if (master_bits & (1 << i))
1606 build_feature_ctl(state, _ftr, 0, i, &iterm,
1607 unitid, 0);
1608 }
1609 } else { /* UAC_VERSION_2 */
1610 for (i = 0; i < ARRAY_SIZE(audio_feature_info); i++) {
1611 unsigned int ch_bits = 0;
1612 unsigned int ch_read_only = 0;
1613
1614 for (j = 0; j < channels; j++) {
1615 unsigned int mask;
1616
1617 mask = snd_usb_combine_bytes(bmaControls +
1618 csize * (j+1), csize);
1619 if (uac2_control_is_readable(mask, i)) {
1620 ch_bits |= (1 << j);
1621 if (!uac2_control_is_writeable(mask, i))
1622 ch_read_only |= (1 << j);
1623 }
1624 }
1625
1626 /*
1627 * NOTE: build_feature_ctl() will mark the control
1628 * read-only if all channels are marked read-only in
1629 * the descriptors. Otherwise, the control will be
1630 * reported as writeable, but the driver will not
1631 * actually issue a write command for read-only
1632 * channels.
1633 */
1634
1635 /*
1636 * The first channel must be set
1637 * (for ease of programming).
1638 */
1639 if (ch_bits & 1)
1640 build_feature_ctl(state, _ftr, ch_bits, i,
1641 &iterm, unitid, ch_read_only);
1642 if (uac2_control_is_readable(master_bits, i))
1643 build_feature_ctl(state, _ftr, 0, i, &iterm, unitid,
1644 !uac2_control_is_writeable(master_bits, i));
1645 }
1646 }
1647
1648 return 0;
1649 }
1650
1651 /*
1652 * Mixer Unit
1653 */
1654
1655 /*
1656 * build a mixer unit control
1657 *
1658 * the callbacks are identical with feature unit.
1659 * input channel number (zero based) is given in control field instead.
1660 */
1661 static void build_mixer_unit_ctl(struct mixer_build *state,
1662 struct uac_mixer_unit_descriptor *desc,
1663 int in_pin, int in_ch, int unitid,
1664 struct usb_audio_term *iterm)
1665 {
1666 struct usb_mixer_elem_info *cval;
1667 unsigned int num_outs = uac_mixer_unit_bNrChannels(desc);
1668 unsigned int i, len;
1669 struct snd_kcontrol *kctl;
1670 const struct usbmix_name_map *map;
1671
1672 map = find_map(state, unitid, 0);
1673 if (check_ignored_ctl(map))
1674 return;
1675
1676 cval = kzalloc(sizeof(*cval), GFP_KERNEL);
1677 if (!cval)
1678 return;
1679
1680 snd_usb_mixer_elem_init_std(&cval->head, state->mixer, unitid);
1681 cval->control = in_ch + 1; /* based on 1 */
1682 cval->val_type = USB_MIXER_S16;
1683 for (i = 0; i < num_outs; i++) {
1684 __u8 *c = uac_mixer_unit_bmControls(desc, state->mixer->protocol);
1685
1686 if (check_matrix_bitmap(c, in_ch, i, num_outs)) {
1687 cval->cmask |= (1 << i);
1688 cval->channels++;
1689 }
1690 }
1691
1692 /* get min/max values */
1693 get_min_max(cval, 0);
1694
1695 kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval);
1696 if (!kctl) {
1697 usb_audio_err(state->chip, "cannot malloc kcontrol\n");
1698 kfree(cval);
1699 return;
1700 }
1701 kctl->private_free = snd_usb_mixer_elem_free;
1702
1703 len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name));
1704 if (!len)
1705 len = get_term_name(state, iterm, kctl->id.name,
1706 sizeof(kctl->id.name), 0);
1707 if (!len)
1708 len = sprintf(kctl->id.name, "Mixer Source %d", in_ch + 1);
1709 append_ctl_name(kctl, " Volume");
1710
1711 usb_audio_dbg(state->chip, "[%d] MU [%s] ch = %d, val = %d/%d\n",
1712 cval->head.id, kctl->id.name, cval->channels, cval->min, cval->max);
1713 snd_usb_mixer_add_control(&cval->head, kctl);
1714 }
1715
1716 /*
1717 * parse a mixer unit
1718 */
1719 static int parse_audio_mixer_unit(struct mixer_build *state, int unitid,
1720 void *raw_desc)
1721 {
1722 struct uac_mixer_unit_descriptor *desc = raw_desc;
1723 struct usb_audio_term iterm;
1724 int input_pins, num_ins, num_outs;
1725 int pin, ich, err;
1726
1727 if (desc->bLength < 11 || !(input_pins = desc->bNrInPins) ||
1728 desc->bLength < sizeof(*desc) + desc->bNrInPins ||
1729 !(num_outs = uac_mixer_unit_bNrChannels(desc))) {
1730 usb_audio_err(state->chip,
1731 "invalid MIXER UNIT descriptor %d\n",
1732 unitid);
1733 return -EINVAL;
1734 }
1735
1736 num_ins = 0;
1737 ich = 0;
1738 for (pin = 0; pin < input_pins; pin++) {
1739 err = parse_audio_unit(state, desc->baSourceID[pin]);
1740 if (err < 0)
1741 continue;
1742 /* no bmControls field (e.g. Maya44) -> ignore */
1743 if (desc->bLength <= 10 + input_pins)
1744 continue;
1745 err = check_input_term(state, desc->baSourceID[pin], &iterm);
1746 if (err < 0)
1747 return err;
1748 num_ins += iterm.channels;
1749 for (; ich < num_ins; ich++) {
1750 int och, ich_has_controls = 0;
1751
1752 for (och = 0; och < num_outs; och++) {
1753 __u8 *c = uac_mixer_unit_bmControls(desc,
1754 state->mixer->protocol);
1755
1756 if (check_matrix_bitmap(c, ich, och, num_outs)) {
1757 ich_has_controls = 1;
1758 break;
1759 }
1760 }
1761 if (ich_has_controls)
1762 build_mixer_unit_ctl(state, desc, pin, ich,
1763 unitid, &iterm);
1764 }
1765 }
1766 return 0;
1767 }
1768
1769 /*
1770 * Processing Unit / Extension Unit
1771 */
1772
1773 /* get callback for processing/extension unit */
1774 static int mixer_ctl_procunit_get(struct snd_kcontrol *kcontrol,
1775 struct snd_ctl_elem_value *ucontrol)
1776 {
1777 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1778 int err, val;
1779
1780 err = get_cur_ctl_value(cval, cval->control << 8, &val);
1781 if (err < 0) {
1782 ucontrol->value.integer.value[0] = cval->min;
1783 return filter_error(cval, err);
1784 }
1785 val = get_relative_value(cval, val);
1786 ucontrol->value.integer.value[0] = val;
1787 return 0;
1788 }
1789
1790 /* put callback for processing/extension unit */
1791 static int mixer_ctl_procunit_put(struct snd_kcontrol *kcontrol,
1792 struct snd_ctl_elem_value *ucontrol)
1793 {
1794 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1795 int val, oval, err;
1796
1797 err = get_cur_ctl_value(cval, cval->control << 8, &oval);
1798 if (err < 0)
1799 return filter_error(cval, err);
1800 val = ucontrol->value.integer.value[0];
1801 val = get_abs_value(cval, val);
1802 if (val != oval) {
1803 set_cur_ctl_value(cval, cval->control << 8, val);
1804 return 1;
1805 }
1806 return 0;
1807 }
1808
1809 /* alsa control interface for processing/extension unit */
1810 static struct snd_kcontrol_new mixer_procunit_ctl = {
1811 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1812 .name = "", /* will be filled later */
1813 .info = mixer_ctl_feature_info,
1814 .get = mixer_ctl_procunit_get,
1815 .put = mixer_ctl_procunit_put,
1816 };
1817
1818 /*
1819 * predefined data for processing units
1820 */
1821 struct procunit_value_info {
1822 int control;
1823 char *suffix;
1824 int val_type;
1825 int min_value;
1826 };
1827
1828 struct procunit_info {
1829 int type;
1830 char *name;
1831 struct procunit_value_info *values;
1832 };
1833
1834 static struct procunit_value_info updown_proc_info[] = {
1835 { UAC_UD_ENABLE, "Switch", USB_MIXER_BOOLEAN },
1836 { UAC_UD_MODE_SELECT, "Mode Select", USB_MIXER_U8, 1 },
1837 { 0 }
1838 };
1839 static struct procunit_value_info prologic_proc_info[] = {
1840 { UAC_DP_ENABLE, "Switch", USB_MIXER_BOOLEAN },
1841 { UAC_DP_MODE_SELECT, "Mode Select", USB_MIXER_U8, 1 },
1842 { 0 }
1843 };
1844 static struct procunit_value_info threed_enh_proc_info[] = {
1845 { UAC_3D_ENABLE, "Switch", USB_MIXER_BOOLEAN },
1846 { UAC_3D_SPACE, "Spaciousness", USB_MIXER_U8 },
1847 { 0 }
1848 };
1849 static struct procunit_value_info reverb_proc_info[] = {
1850 { UAC_REVERB_ENABLE, "Switch", USB_MIXER_BOOLEAN },
1851 { UAC_REVERB_LEVEL, "Level", USB_MIXER_U8 },
1852 { UAC_REVERB_TIME, "Time", USB_MIXER_U16 },
1853 { UAC_REVERB_FEEDBACK, "Feedback", USB_MIXER_U8 },
1854 { 0 }
1855 };
1856 static struct procunit_value_info chorus_proc_info[] = {
1857 { UAC_CHORUS_ENABLE, "Switch", USB_MIXER_BOOLEAN },
1858 { UAC_CHORUS_LEVEL, "Level", USB_MIXER_U8 },
1859 { UAC_CHORUS_RATE, "Rate", USB_MIXER_U16 },
1860 { UAC_CHORUS_DEPTH, "Depth", USB_MIXER_U16 },
1861 { 0 }
1862 };
1863 static struct procunit_value_info dcr_proc_info[] = {
1864 { UAC_DCR_ENABLE, "Switch", USB_MIXER_BOOLEAN },
1865 { UAC_DCR_RATE, "Ratio", USB_MIXER_U16 },
1866 { UAC_DCR_MAXAMPL, "Max Amp", USB_MIXER_S16 },
1867 { UAC_DCR_THRESHOLD, "Threshold", USB_MIXER_S16 },
1868 { UAC_DCR_ATTACK_TIME, "Attack Time", USB_MIXER_U16 },
1869 { UAC_DCR_RELEASE_TIME, "Release Time", USB_MIXER_U16 },
1870 { 0 }
1871 };
1872
1873 static struct procunit_info procunits[] = {
1874 { UAC_PROCESS_UP_DOWNMIX, "Up Down", updown_proc_info },
1875 { UAC_PROCESS_DOLBY_PROLOGIC, "Dolby Prologic", prologic_proc_info },
1876 { UAC_PROCESS_STEREO_EXTENDER, "3D Stereo Extender", threed_enh_proc_info },
1877 { UAC_PROCESS_REVERB, "Reverb", reverb_proc_info },
1878 { UAC_PROCESS_CHORUS, "Chorus", chorus_proc_info },
1879 { UAC_PROCESS_DYN_RANGE_COMP, "DCR", dcr_proc_info },
1880 { 0 },
1881 };
1882 /*
1883 * predefined data for extension units
1884 */
1885 static struct procunit_value_info clock_rate_xu_info[] = {
1886 { USB_XU_CLOCK_RATE_SELECTOR, "Selector", USB_MIXER_U8, 0 },
1887 { 0 }
1888 };
1889 static struct procunit_value_info clock_source_xu_info[] = {
1890 { USB_XU_CLOCK_SOURCE_SELECTOR, "External", USB_MIXER_BOOLEAN },
1891 { 0 }
1892 };
1893 static struct procunit_value_info spdif_format_xu_info[] = {
1894 { USB_XU_DIGITAL_FORMAT_SELECTOR, "SPDIF/AC3", USB_MIXER_BOOLEAN },
1895 { 0 }
1896 };
1897 static struct procunit_value_info soft_limit_xu_info[] = {
1898 { USB_XU_SOFT_LIMIT_SELECTOR, " ", USB_MIXER_BOOLEAN },
1899 { 0 }
1900 };
1901 static struct procunit_info extunits[] = {
1902 { USB_XU_CLOCK_RATE, "Clock rate", clock_rate_xu_info },
1903 { USB_XU_CLOCK_SOURCE, "DigitalIn CLK source", clock_source_xu_info },
1904 { USB_XU_DIGITAL_IO_STATUS, "DigitalOut format:", spdif_format_xu_info },
1905 { USB_XU_DEVICE_OPTIONS, "AnalogueIn Soft Limit", soft_limit_xu_info },
1906 { 0 }
1907 };
1908
1909 /*
1910 * build a processing/extension unit
1911 */
1912 static int build_audio_procunit(struct mixer_build *state, int unitid,
1913 void *raw_desc, struct procunit_info *list,
1914 char *name)
1915 {
1916 struct uac_processing_unit_descriptor *desc = raw_desc;
1917 int num_ins;
1918 struct usb_mixer_elem_info *cval;
1919 struct snd_kcontrol *kctl;
1920 int i, err, nameid, type, len;
1921 struct procunit_info *info;
1922 struct procunit_value_info *valinfo;
1923 const struct usbmix_name_map *map;
1924 static struct procunit_value_info default_value_info[] = {
1925 { 0x01, "Switch", USB_MIXER_BOOLEAN },
1926 { 0 }
1927 };
1928 static struct procunit_info default_info = {
1929 0, NULL, default_value_info
1930 };
1931
1932 if (desc->bLength < 13) {
1933 usb_audio_err(state->chip, "invalid %s descriptor (id %d)\n", name, unitid);
1934 return -EINVAL;
1935 }
1936
1937 num_ins = desc->bNrInPins;
1938 if (desc->bLength < 13 + num_ins ||
1939 desc->bLength < num_ins + uac_processing_unit_bControlSize(desc, state->mixer->protocol)) {
1940 usb_audio_err(state->chip, "invalid %s descriptor (id %d)\n", name, unitid);
1941 return -EINVAL;
1942 }
1943
1944 for (i = 0; i < num_ins; i++) {
1945 if ((err = parse_audio_unit(state, desc->baSourceID[i])) < 0)
1946 return err;
1947 }
1948
1949 type = le16_to_cpu(desc->wProcessType);
1950 for (info = list; info && info->type; info++)
1951 if (info->type == type)
1952 break;
1953 if (!info || !info->type)
1954 info = &default_info;
1955
1956 for (valinfo = info->values; valinfo->control; valinfo++) {
1957 __u8 *controls = uac_processing_unit_bmControls(desc, state->mixer->protocol);
1958
1959 if (!(controls[valinfo->control / 8] & (1 << ((valinfo->control % 8) - 1))))
1960 continue;
1961 map = find_map(state, unitid, valinfo->control);
1962 if (check_ignored_ctl(map))
1963 continue;
1964 cval = kzalloc(sizeof(*cval), GFP_KERNEL);
1965 if (!cval)
1966 return -ENOMEM;
1967 snd_usb_mixer_elem_init_std(&cval->head, state->mixer, unitid);
1968 cval->control = valinfo->control;
1969 cval->val_type = valinfo->val_type;
1970 cval->channels = 1;
1971
1972 /* get min/max values */
1973 if (type == UAC_PROCESS_UP_DOWNMIX && cval->control == UAC_UD_MODE_SELECT) {
1974 __u8 *control_spec = uac_processing_unit_specific(desc, state->mixer->protocol);
1975 /* FIXME: hard-coded */
1976 cval->min = 1;
1977 cval->max = control_spec[0];
1978 cval->res = 1;
1979 cval->initialized = 1;
1980 } else {
1981 if (type == USB_XU_CLOCK_RATE) {
1982 /*
1983 * E-Mu USB 0404/0202/TrackerPre/0204
1984 * samplerate control quirk
1985 */
1986 cval->min = 0;
1987 cval->max = 5;
1988 cval->res = 1;
1989 cval->initialized = 1;
1990 } else
1991 get_min_max(cval, valinfo->min_value);
1992 }
1993
1994 kctl = snd_ctl_new1(&mixer_procunit_ctl, cval);
1995 if (!kctl) {
1996 kfree(cval);
1997 return -ENOMEM;
1998 }
1999 kctl->private_free = snd_usb_mixer_elem_free;
2000
2001 if (check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name))) {
2002 /* nothing */ ;
2003 } else if (info->name) {
2004 strlcpy(kctl->id.name, info->name, sizeof(kctl->id.name));
2005 } else {
2006 nameid = uac_processing_unit_iProcessing(desc, state->mixer->protocol);
2007 len = 0;
2008 if (nameid)
2009 len = snd_usb_copy_string_desc(state, nameid,
2010 kctl->id.name,
2011 sizeof(kctl->id.name));
2012 if (!len)
2013 strlcpy(kctl->id.name, name, sizeof(kctl->id.name));
2014 }
2015 append_ctl_name(kctl, " ");
2016 append_ctl_name(kctl, valinfo->suffix);
2017
2018 usb_audio_dbg(state->chip,
2019 "[%d] PU [%s] ch = %d, val = %d/%d\n",
2020 cval->head.id, kctl->id.name, cval->channels,
2021 cval->min, cval->max);
2022
2023 err = snd_usb_mixer_add_control(&cval->head, kctl);
2024 if (err < 0)
2025 return err;
2026 }
2027 return 0;
2028 }
2029
2030 static int parse_audio_processing_unit(struct mixer_build *state, int unitid,
2031 void *raw_desc)
2032 {
2033 return build_audio_procunit(state, unitid, raw_desc,
2034 procunits, "Processing Unit");
2035 }
2036
2037 static int parse_audio_extension_unit(struct mixer_build *state, int unitid,
2038 void *raw_desc)
2039 {
2040 /*
2041 * Note that we parse extension units with processing unit descriptors.
2042 * That's ok as the layout is the same.
2043 */
2044 return build_audio_procunit(state, unitid, raw_desc,
2045 extunits, "Extension Unit");
2046 }
2047
2048 /*
2049 * Selector Unit
2050 */
2051
2052 /*
2053 * info callback for selector unit
2054 * use an enumerator type for routing
2055 */
2056 static int mixer_ctl_selector_info(struct snd_kcontrol *kcontrol,
2057 struct snd_ctl_elem_info *uinfo)
2058 {
2059 struct usb_mixer_elem_info *cval = kcontrol->private_data;
2060 const char **itemlist = (const char **)kcontrol->private_value;
2061
2062 if (snd_BUG_ON(!itemlist))
2063 return -EINVAL;
2064 return snd_ctl_enum_info(uinfo, 1, cval->max, itemlist);
2065 }
2066
2067 /* get callback for selector unit */
2068 static int mixer_ctl_selector_get(struct snd_kcontrol *kcontrol,
2069 struct snd_ctl_elem_value *ucontrol)
2070 {
2071 struct usb_mixer_elem_info *cval = kcontrol->private_data;
2072 int val, err;
2073
2074 err = get_cur_ctl_value(cval, cval->control << 8, &val);
2075 if (err < 0) {
2076 ucontrol->value.enumerated.item[0] = 0;
2077 return filter_error(cval, err);
2078 }
2079 val = get_relative_value(cval, val);
2080 ucontrol->value.enumerated.item[0] = val;
2081 return 0;
2082 }
2083
2084 /* put callback for selector unit */
2085 static int mixer_ctl_selector_put(struct snd_kcontrol *kcontrol,
2086 struct snd_ctl_elem_value *ucontrol)
2087 {
2088 struct usb_mixer_elem_info *cval = kcontrol->private_data;
2089 int val, oval, err;
2090
2091 err = get_cur_ctl_value(cval, cval->control << 8, &oval);
2092 if (err < 0)
2093 return filter_error(cval, err);
2094 val = ucontrol->value.enumerated.item[0];
2095 val = get_abs_value(cval, val);
2096 if (val != oval) {
2097 set_cur_ctl_value(cval, cval->control << 8, val);
2098 return 1;
2099 }
2100 return 0;
2101 }
2102
2103 /* alsa control interface for selector unit */
2104 static struct snd_kcontrol_new mixer_selectunit_ctl = {
2105 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
2106 .name = "", /* will be filled later */
2107 .info = mixer_ctl_selector_info,
2108 .get = mixer_ctl_selector_get,
2109 .put = mixer_ctl_selector_put,
2110 };
2111
2112 /*
2113 * private free callback.
2114 * free both private_data and private_value
2115 */
2116 static void usb_mixer_selector_elem_free(struct snd_kcontrol *kctl)
2117 {
2118 int i, num_ins = 0;
2119
2120 if (kctl->private_data) {
2121 struct usb_mixer_elem_info *cval = kctl->private_data;
2122 num_ins = cval->max;
2123 kfree(cval);
2124 kctl->private_data = NULL;
2125 }
2126 if (kctl->private_value) {
2127 char **itemlist = (char **)kctl->private_value;
2128 for (i = 0; i < num_ins; i++)
2129 kfree(itemlist[i]);
2130 kfree(itemlist);
2131 kctl->private_value = 0;
2132 }
2133 }
2134
2135 /*
2136 * parse a selector unit
2137 */
2138 static int parse_audio_selector_unit(struct mixer_build *state, int unitid,
2139 void *raw_desc)
2140 {
2141 struct uac_selector_unit_descriptor *desc = raw_desc;
2142 unsigned int i, nameid, len;
2143 int err;
2144 struct usb_mixer_elem_info *cval;
2145 struct snd_kcontrol *kctl;
2146 const struct usbmix_name_map *map;
2147 char **namelist;
2148
2149 if (desc->bLength < 5 || !desc->bNrInPins ||
2150 desc->bLength < 5 + desc->bNrInPins) {
2151 usb_audio_err(state->chip,
2152 "invalid SELECTOR UNIT descriptor %d\n", unitid);
2153 return -EINVAL;
2154 }
2155
2156 for (i = 0; i < desc->bNrInPins; i++) {
2157 if ((err = parse_audio_unit(state, desc->baSourceID[i])) < 0)
2158 return err;
2159 }
2160
2161 if (desc->bNrInPins == 1) /* only one ? nonsense! */
2162 return 0;
2163
2164 map = find_map(state, unitid, 0);
2165 if (check_ignored_ctl(map))
2166 return 0;
2167
2168 cval = kzalloc(sizeof(*cval), GFP_KERNEL);
2169 if (!cval)
2170 return -ENOMEM;
2171 snd_usb_mixer_elem_init_std(&cval->head, state->mixer, unitid);
2172 cval->val_type = USB_MIXER_U8;
2173 cval->channels = 1;
2174 cval->min = 1;
2175 cval->max = desc->bNrInPins;
2176 cval->res = 1;
2177 cval->initialized = 1;
2178
2179 if (state->mixer->protocol == UAC_VERSION_1)
2180 cval->control = 0;
2181 else /* UAC_VERSION_2 */
2182 cval->control = (desc->bDescriptorSubtype == UAC2_CLOCK_SELECTOR) ?
2183 UAC2_CX_CLOCK_SELECTOR : UAC2_SU_SELECTOR;
2184
2185 namelist = kmalloc(sizeof(char *) * desc->bNrInPins, GFP_KERNEL);
2186 if (!namelist) {
2187 kfree(cval);
2188 return -ENOMEM;
2189 }
2190 #define MAX_ITEM_NAME_LEN 64
2191 for (i = 0; i < desc->bNrInPins; i++) {
2192 struct usb_audio_term iterm;
2193 len = 0;
2194 namelist[i] = kmalloc(MAX_ITEM_NAME_LEN, GFP_KERNEL);
2195 if (!namelist[i]) {
2196 while (i--)
2197 kfree(namelist[i]);
2198 kfree(namelist);
2199 kfree(cval);
2200 return -ENOMEM;
2201 }
2202 len = check_mapped_selector_name(state, unitid, i, namelist[i],
2203 MAX_ITEM_NAME_LEN);
2204 if (! len && check_input_term(state, desc->baSourceID[i], &iterm) >= 0)
2205 len = get_term_name(state, &iterm, namelist[i], MAX_ITEM_NAME_LEN, 0);
2206 if (! len)
2207 sprintf(namelist[i], "Input %u", i);
2208 }
2209
2210 kctl = snd_ctl_new1(&mixer_selectunit_ctl, cval);
2211 if (! kctl) {
2212 usb_audio_err(state->chip, "cannot malloc kcontrol\n");
2213 for (i = 0; i < desc->bNrInPins; i++)
2214 kfree(namelist[i]);
2215 kfree(namelist);
2216 kfree(cval);
2217 return -ENOMEM;
2218 }
2219 kctl->private_value = (unsigned long)namelist;
2220 kctl->private_free = usb_mixer_selector_elem_free;
2221
2222 /* check the static mapping table at first */
2223 len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name));
2224 if (!len) {
2225 /* no mapping ? */
2226 /* if iSelector is given, use it */
2227 nameid = uac_selector_unit_iSelector(desc);
2228 if (nameid)
2229 len = snd_usb_copy_string_desc(state, nameid,
2230 kctl->id.name,
2231 sizeof(kctl->id.name));
2232 /* ... or pick up the terminal name at next */
2233 if (!len)
2234 len = get_term_name(state, &state->oterm,
2235 kctl->id.name, sizeof(kctl->id.name), 0);
2236 /* ... or use the fixed string "USB" as the last resort */
2237 if (!len)
2238 strlcpy(kctl->id.name, "USB", sizeof(kctl->id.name));
2239
2240 /* and add the proper suffix */
2241 if (desc->bDescriptorSubtype == UAC2_CLOCK_SELECTOR)
2242 append_ctl_name(kctl, " Clock Source");
2243 else if ((state->oterm.type & 0xff00) == 0x0100)
2244 append_ctl_name(kctl, " Capture Source");
2245 else
2246 append_ctl_name(kctl, " Playback Source");
2247 }
2248
2249 usb_audio_dbg(state->chip, "[%d] SU [%s] items = %d\n",
2250 cval->head.id, kctl->id.name, desc->bNrInPins);
2251 return snd_usb_mixer_add_control(&cval->head, kctl);
2252 }
2253
2254 /*
2255 * parse an audio unit recursively
2256 */
2257
2258 static int parse_audio_unit(struct mixer_build *state, int unitid)
2259 {
2260 unsigned char *p1;
2261
2262 if (test_and_set_bit(unitid, state->unitbitmap))
2263 return 0; /* the unit already visited */
2264
2265 p1 = find_audio_control_unit(state, unitid);
2266 if (!p1) {
2267 usb_audio_err(state->chip, "unit %d not found!\n", unitid);
2268 return -EINVAL;
2269 }
2270
2271 switch (p1[2]) {
2272 case UAC_INPUT_TERMINAL:
2273 return 0; /* NOP */
2274 case UAC_MIXER_UNIT:
2275 return parse_audio_mixer_unit(state, unitid, p1);
2276 case UAC2_CLOCK_SOURCE:
2277 return parse_clock_source_unit(state, unitid, p1);
2278 case UAC_SELECTOR_UNIT:
2279 case UAC2_CLOCK_SELECTOR:
2280 return parse_audio_selector_unit(state, unitid, p1);
2281 case UAC_FEATURE_UNIT:
2282 return parse_audio_feature_unit(state, unitid, p1);
2283 case UAC1_PROCESSING_UNIT:
2284 /* UAC2_EFFECT_UNIT has the same value */
2285 if (state->mixer->protocol == UAC_VERSION_1)
2286 return parse_audio_processing_unit(state, unitid, p1);
2287 else
2288 return 0; /* FIXME - effect units not implemented yet */
2289 case UAC1_EXTENSION_UNIT:
2290 /* UAC2_PROCESSING_UNIT_V2 has the same value */
2291 if (state->mixer->protocol == UAC_VERSION_1)
2292 return parse_audio_extension_unit(state, unitid, p1);
2293 else /* UAC_VERSION_2 */
2294 return parse_audio_processing_unit(state, unitid, p1);
2295 case UAC2_EXTENSION_UNIT_V2:
2296 return parse_audio_extension_unit(state, unitid, p1);
2297 default:
2298 usb_audio_err(state->chip,
2299 "unit %u: unexpected type 0x%02x\n", unitid, p1[2]);
2300 return -EINVAL;
2301 }
2302 }
2303
2304 static void snd_usb_mixer_free(struct usb_mixer_interface *mixer)
2305 {
2306 /* kill pending URBs */
2307 snd_usb_mixer_disconnect(mixer);
2308
2309 kfree(mixer->id_elems);
2310 if (mixer->urb) {
2311 kfree(mixer->urb->transfer_buffer);
2312 usb_free_urb(mixer->urb);
2313 }
2314 usb_free_urb(mixer->rc_urb);
2315 kfree(mixer->rc_setup_packet);
2316 kfree(mixer);
2317 }
2318
2319 static int snd_usb_mixer_dev_free(struct snd_device *device)
2320 {
2321 struct usb_mixer_interface *mixer = device->device_data;
2322 snd_usb_mixer_free(mixer);
2323 return 0;
2324 }
2325
2326 /*
2327 * create mixer controls
2328 *
2329 * walk through all UAC_OUTPUT_TERMINAL descriptors to search for mixers
2330 */
2331 static int snd_usb_mixer_controls(struct usb_mixer_interface *mixer)
2332 {
2333 struct mixer_build state;
2334 int err;
2335 const struct usbmix_ctl_map *map;
2336 void *p;
2337
2338 memset(&state, 0, sizeof(state));
2339 state.chip = mixer->chip;
2340 state.mixer = mixer;
2341 state.buffer = mixer->hostif->extra;
2342 state.buflen = mixer->hostif->extralen;
2343
2344 /* check the mapping table */
2345 for (map = usbmix_ctl_maps; map->id; map++) {
2346 if (map->id == state.chip->usb_id) {
2347 state.map = map->map;
2348 state.selector_map = map->selector_map;
2349 mixer->ignore_ctl_error |= map->ignore_ctl_error;
2350 break;
2351 }
2352 }
2353
2354 p = NULL;
2355 while ((p = snd_usb_find_csint_desc(mixer->hostif->extra,
2356 mixer->hostif->extralen,
2357 p, UAC_OUTPUT_TERMINAL)) != NULL) {
2358 if (mixer->protocol == UAC_VERSION_1) {
2359 struct uac1_output_terminal_descriptor *desc = p;
2360
2361 if (desc->bLength < sizeof(*desc))
2362 continue; /* invalid descriptor? */
2363 /* mark terminal ID as visited */
2364 set_bit(desc->bTerminalID, state.unitbitmap);
2365 state.oterm.id = desc->bTerminalID;
2366 state.oterm.type = le16_to_cpu(desc->wTerminalType);
2367 state.oterm.name = desc->iTerminal;
2368 err = parse_audio_unit(&state, desc->bSourceID);
2369 if (err < 0 && err != -EINVAL)
2370 return err;
2371 } else { /* UAC_VERSION_2 */
2372 struct uac2_output_terminal_descriptor *desc = p;
2373
2374 if (desc->bLength < sizeof(*desc))
2375 continue; /* invalid descriptor? */
2376 /* mark terminal ID as visited */
2377 set_bit(desc->bTerminalID, state.unitbitmap);
2378 state.oterm.id = desc->bTerminalID;
2379 state.oterm.type = le16_to_cpu(desc->wTerminalType);
2380 state.oterm.name = desc->iTerminal;
2381 err = parse_audio_unit(&state, desc->bSourceID);
2382 if (err < 0 && err != -EINVAL)
2383 return err;
2384
2385 /*
2386 * For UAC2, use the same approach to also add the
2387 * clock selectors
2388 */
2389 err = parse_audio_unit(&state, desc->bCSourceID);
2390 if (err < 0 && err != -EINVAL)
2391 return err;
2392 }
2393 }
2394
2395 return 0;
2396 }
2397
2398 void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer, int unitid)
2399 {
2400 struct usb_mixer_elem_list *list;
2401
2402 for_each_mixer_elem(list, mixer, unitid) {
2403 struct usb_mixer_elem_info *info;
2404
2405 if (!list->is_std_info)
2406 continue;
2407 info = mixer_elem_list_to_info(list);
2408 /* invalidate cache, so the value is read from the device */
2409 info->cached = 0;
2410 snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
2411 &list->kctl->id);
2412 }
2413 }
2414
2415 static void snd_usb_mixer_dump_cval(struct snd_info_buffer *buffer,
2416 struct usb_mixer_elem_list *list)
2417 {
2418 struct usb_mixer_elem_info *cval = mixer_elem_list_to_info(list);
2419 static char *val_types[] = {"BOOLEAN", "INV_BOOLEAN",
2420 "S8", "U8", "S16", "U16"};
2421 snd_iprintf(buffer, " Info: id=%i, control=%i, cmask=0x%x, "
2422 "channels=%i, type=\"%s\"\n", cval->head.id,
2423 cval->control, cval->cmask, cval->channels,
2424 val_types[cval->val_type]);
2425 snd_iprintf(buffer, " Volume: min=%i, max=%i, dBmin=%i, dBmax=%i\n",
2426 cval->min, cval->max, cval->dBmin, cval->dBmax);
2427 }
2428
2429 static void snd_usb_mixer_proc_read(struct snd_info_entry *entry,
2430 struct snd_info_buffer *buffer)
2431 {
2432 struct snd_usb_audio *chip = entry->private_data;
2433 struct usb_mixer_interface *mixer;
2434 struct usb_mixer_elem_list *list;
2435 int unitid;
2436
2437 list_for_each_entry(mixer, &chip->mixer_list, list) {
2438 snd_iprintf(buffer,
2439 "USB Mixer: usb_id=0x%08x, ctrlif=%i, ctlerr=%i\n",
2440 chip->usb_id, snd_usb_ctrl_intf(chip),
2441 mixer->ignore_ctl_error);
2442 snd_iprintf(buffer, "Card: %s\n", chip->card->longname);
2443 for (unitid = 0; unitid < MAX_ID_ELEMS; unitid++) {
2444 for_each_mixer_elem(list, mixer, unitid) {
2445 snd_iprintf(buffer, " Unit: %i\n", list->id);
2446 if (list->kctl)
2447 snd_iprintf(buffer,
2448 " Control: name=\"%s\", index=%i\n",
2449 list->kctl->id.name,
2450 list->kctl->id.index);
2451 if (list->dump)
2452 list->dump(buffer, list);
2453 }
2454 }
2455 }
2456 }
2457
2458 static void snd_usb_mixer_interrupt_v2(struct usb_mixer_interface *mixer,
2459 int attribute, int value, int index)
2460 {
2461 struct usb_mixer_elem_list *list;
2462 __u8 unitid = (index >> 8) & 0xff;
2463 __u8 control = (value >> 8) & 0xff;
2464 __u8 channel = value & 0xff;
2465 unsigned int count = 0;
2466
2467 if (channel >= MAX_CHANNELS) {
2468 usb_audio_dbg(mixer->chip,
2469 "%s(): bogus channel number %d\n",
2470 __func__, channel);
2471 return;
2472 }
2473
2474 for_each_mixer_elem(list, mixer, unitid)
2475 count++;
2476
2477 if (count == 0)
2478 return;
2479
2480 for_each_mixer_elem(list, mixer, unitid) {
2481 struct usb_mixer_elem_info *info;
2482
2483 if (!list->kctl)
2484 continue;
2485 if (!list->is_std_info)
2486 continue;
2487
2488 info = mixer_elem_list_to_info(list);
2489 if (count > 1 && info->control != control)
2490 continue;
2491
2492 switch (attribute) {
2493 case UAC2_CS_CUR:
2494 /* invalidate cache, so the value is read from the device */
2495 if (channel)
2496 info->cached &= ~(1 << channel);
2497 else /* master channel */
2498 info->cached = 0;
2499
2500 snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
2501 &info->head.kctl->id);
2502 break;
2503
2504 case UAC2_CS_RANGE:
2505 /* TODO */
2506 break;
2507
2508 case UAC2_CS_MEM:
2509 /* TODO */
2510 break;
2511
2512 default:
2513 usb_audio_dbg(mixer->chip,
2514 "unknown attribute %d in interrupt\n",
2515 attribute);
2516 break;
2517 } /* switch */
2518 }
2519 }
2520
2521 static void snd_usb_mixer_interrupt(struct urb *urb)
2522 {
2523 struct usb_mixer_interface *mixer = urb->context;
2524 int len = urb->actual_length;
2525 int ustatus = urb->status;
2526
2527 if (ustatus != 0)
2528 goto requeue;
2529
2530 if (mixer->protocol == UAC_VERSION_1) {
2531 struct uac1_status_word *status;
2532
2533 for (status = urb->transfer_buffer;
2534 len >= sizeof(*status);
2535 len -= sizeof(*status), status++) {
2536 dev_dbg(&urb->dev->dev, "status interrupt: %02x %02x\n",
2537 status->bStatusType,
2538 status->bOriginator);
2539
2540 /* ignore any notifications not from the control interface */
2541 if ((status->bStatusType & UAC1_STATUS_TYPE_ORIG_MASK) !=
2542 UAC1_STATUS_TYPE_ORIG_AUDIO_CONTROL_IF)
2543 continue;
2544
2545 if (status->bStatusType & UAC1_STATUS_TYPE_MEM_CHANGED)
2546 snd_usb_mixer_rc_memory_change(mixer, status->bOriginator);
2547 else
2548 snd_usb_mixer_notify_id(mixer, status->bOriginator);
2549 }
2550 } else { /* UAC_VERSION_2 */
2551 struct uac2_interrupt_data_msg *msg;
2552
2553 for (msg = urb->transfer_buffer;
2554 len >= sizeof(*msg);
2555 len -= sizeof(*msg), msg++) {
2556 /* drop vendor specific and endpoint requests */
2557 if ((msg->bInfo & UAC2_INTERRUPT_DATA_MSG_VENDOR) ||
2558 (msg->bInfo & UAC2_INTERRUPT_DATA_MSG_EP))
2559 continue;
2560
2561 snd_usb_mixer_interrupt_v2(mixer, msg->bAttribute,
2562 le16_to_cpu(msg->wValue),
2563 le16_to_cpu(msg->wIndex));
2564 }
2565 }
2566
2567 requeue:
2568 if (ustatus != -ENOENT &&
2569 ustatus != -ECONNRESET &&
2570 ustatus != -ESHUTDOWN) {
2571 urb->dev = mixer->chip->dev;
2572 usb_submit_urb(urb, GFP_ATOMIC);
2573 }
2574 }
2575
2576 /* create the handler for the optional status interrupt endpoint */
2577 static int snd_usb_mixer_status_create(struct usb_mixer_interface *mixer)
2578 {
2579 struct usb_endpoint_descriptor *ep;
2580 void *transfer_buffer;
2581 int buffer_length;
2582 unsigned int epnum;
2583
2584 /* we need one interrupt input endpoint */
2585 if (get_iface_desc(mixer->hostif)->bNumEndpoints < 1)
2586 return 0;
2587 ep = get_endpoint(mixer->hostif, 0);
2588 if (!usb_endpoint_dir_in(ep) || !usb_endpoint_xfer_int(ep))
2589 return 0;
2590
2591 epnum = usb_endpoint_num(ep);
2592 buffer_length = le16_to_cpu(ep->wMaxPacketSize);
2593 transfer_buffer = kmalloc(buffer_length, GFP_KERNEL);
2594 if (!transfer_buffer)
2595 return -ENOMEM;
2596 mixer->urb = usb_alloc_urb(0, GFP_KERNEL);
2597 if (!mixer->urb) {
2598 kfree(transfer_buffer);
2599 return -ENOMEM;
2600 }
2601 usb_fill_int_urb(mixer->urb, mixer->chip->dev,
2602 usb_rcvintpipe(mixer->chip->dev, epnum),
2603 transfer_buffer, buffer_length,
2604 snd_usb_mixer_interrupt, mixer, ep->bInterval);
2605 usb_submit_urb(mixer->urb, GFP_KERNEL);
2606 return 0;
2607 }
2608
2609 int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif,
2610 int ignore_error)
2611 {
2612 static struct snd_device_ops dev_ops = {
2613 .dev_free = snd_usb_mixer_dev_free
2614 };
2615 struct usb_mixer_interface *mixer;
2616 struct snd_info_entry *entry;
2617 int err;
2618
2619 strcpy(chip->card->mixername, "USB Mixer");
2620
2621 mixer = kzalloc(sizeof(*mixer), GFP_KERNEL);
2622 if (!mixer)
2623 return -ENOMEM;
2624 mixer->chip = chip;
2625 mixer->ignore_ctl_error = ignore_error;
2626 mixer->id_elems = kcalloc(MAX_ID_ELEMS, sizeof(*mixer->id_elems),
2627 GFP_KERNEL);
2628 if (!mixer->id_elems) {
2629 kfree(mixer);
2630 return -ENOMEM;
2631 }
2632
2633 mixer->hostif = &usb_ifnum_to_if(chip->dev, ctrlif)->altsetting[0];
2634 switch (get_iface_desc(mixer->hostif)->bInterfaceProtocol) {
2635 case UAC_VERSION_1:
2636 default:
2637 mixer->protocol = UAC_VERSION_1;
2638 break;
2639 case UAC_VERSION_2:
2640 mixer->protocol = UAC_VERSION_2;
2641 break;
2642 }
2643
2644 if ((err = snd_usb_mixer_controls(mixer)) < 0 ||
2645 (err = snd_usb_mixer_status_create(mixer)) < 0)
2646 goto _error;
2647
2648 err = snd_usb_mixer_apply_create_quirk(mixer);
2649 if (err < 0)
2650 goto _error;
2651
2652 err = snd_device_new(chip->card, SNDRV_DEV_CODEC, mixer, &dev_ops);
2653 if (err < 0)
2654 goto _error;
2655
2656 if (list_empty(&chip->mixer_list) &&
2657 !snd_card_proc_new(chip->card, "usbmixer", &entry))
2658 snd_info_set_text_ops(entry, chip, snd_usb_mixer_proc_read);
2659
2660 list_add(&mixer->list, &chip->mixer_list);
2661 return 0;
2662
2663 _error:
2664 snd_usb_mixer_free(mixer);
2665 return err;
2666 }
2667
2668 void snd_usb_mixer_disconnect(struct usb_mixer_interface *mixer)
2669 {
2670 if (mixer->disconnected)
2671 return;
2672 if (mixer->urb)
2673 usb_kill_urb(mixer->urb);
2674 if (mixer->rc_urb)
2675 usb_kill_urb(mixer->rc_urb);
2676 mixer->disconnected = true;
2677 }
2678
2679 #ifdef CONFIG_PM
2680 /* stop any bus activity of a mixer */
2681 static void snd_usb_mixer_inactivate(struct usb_mixer_interface *mixer)
2682 {
2683 usb_kill_urb(mixer->urb);
2684 usb_kill_urb(mixer->rc_urb);
2685 }
2686
2687 static int snd_usb_mixer_activate(struct usb_mixer_interface *mixer)
2688 {
2689 int err;
2690
2691 if (mixer->urb) {
2692 err = usb_submit_urb(mixer->urb, GFP_NOIO);
2693 if (err < 0)
2694 return err;
2695 }
2696
2697 return 0;
2698 }
2699
2700 int snd_usb_mixer_suspend(struct usb_mixer_interface *mixer)
2701 {
2702 snd_usb_mixer_inactivate(mixer);
2703 return 0;
2704 }
2705
2706 static int restore_mixer_value(struct usb_mixer_elem_list *list)
2707 {
2708 struct usb_mixer_elem_info *cval = mixer_elem_list_to_info(list);
2709 int c, err, idx;
2710
2711 if (cval->cmask) {
2712 idx = 0;
2713 for (c = 0; c < MAX_CHANNELS; c++) {
2714 if (!(cval->cmask & (1 << c)))
2715 continue;
2716 if (cval->cached & (1 << (c + 1))) {
2717 err = snd_usb_set_cur_mix_value(cval, c + 1, idx,
2718 cval->cache_val[idx]);
2719 if (err < 0)
2720 return err;
2721 }
2722 idx++;
2723 }
2724 } else {
2725 /* master */
2726 if (cval->cached) {
2727 err = snd_usb_set_cur_mix_value(cval, 0, 0, *cval->cache_val);
2728 if (err < 0)
2729 return err;
2730 }
2731 }
2732
2733 return 0;
2734 }
2735
2736 int snd_usb_mixer_resume(struct usb_mixer_interface *mixer, bool reset_resume)
2737 {
2738 struct usb_mixer_elem_list *list;
2739 int id, err;
2740
2741 if (reset_resume) {
2742 /* restore cached mixer values */
2743 for (id = 0; id < MAX_ID_ELEMS; id++) {
2744 for_each_mixer_elem(list, mixer, id) {
2745 if (list->resume) {
2746 err = list->resume(list);
2747 if (err < 0)
2748 return err;
2749 }
2750 }
2751 }
2752 }
2753
2754 return snd_usb_mixer_activate(mixer);
2755 }
2756 #endif
2757
2758 void snd_usb_mixer_elem_init_std(struct usb_mixer_elem_list *list,
2759 struct usb_mixer_interface *mixer,
2760 int unitid)
2761 {
2762 list->mixer = mixer;
2763 list->id = unitid;
2764 list->dump = snd_usb_mixer_dump_cval;
2765 #ifdef CONFIG_PM
2766 list->resume = restore_mixer_value;
2767 #endif
2768 }
Linux with added FPC-III support