1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * (Tentative) USB Audio Driver for ALSA
4 *
5 * Mixer control part
6 *
7 * Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
8 *
9 * Many codes borrowed from audio.c by
10 * Alan Cox (alan@lxorguk.ukuu.org.uk)
11 * Thomas Sailer (sailer@ife.ee.ethz.ch)
12 */
13
14 /*
15 * TODOs, for both the mixer and the streaming interfaces:
16 *
17 * - support for UAC2 effect units
18 * - support for graphical equalizers
19 * - RANGE and MEM set commands (UAC2)
20 * - RANGE and MEM interrupt dispatchers (UAC2)
21 * - audio channel clustering (UAC2)
22 * - audio sample rate converter units (UAC2)
23 * - proper handling of clock multipliers (UAC2)
24 * - dispatch clock change notifications (UAC2)
25 * - stop PCM streams which use a clock that became invalid
26 * - stop PCM streams which use a clock selector that has changed
27 * - parse available sample rates again when clock sources changed
28 */
29
30 #include <linux/bitops.h>
31 #include <linux/init.h>
32 #include <linux/list.h>
33 #include <linux/log2.h>
34 #include <linux/slab.h>
35 #include <linux/string.h>
36 #include <linux/usb.h>
37 #include <linux/usb/audio.h>
38 #include <linux/usb/audio-v2.h>
39 #include <linux/usb/audio-v3.h>
40
41 #include <sound/core.h>
42 #include <sound/control.h>
43 #include <sound/hwdep.h>
44 #include <sound/info.h>
45 #include <sound/tlv.h>
46
47 #include "usbaudio.h"
48 #include "mixer.h"
49 #include "helper.h"
50 #include "mixer_quirks.h"
51 #include "power.h"
52
53 #define MAX_ID_ELEMS 256
54
55 struct usb_audio_term {
56 int id;
57 int type;
58 int channels;
59 unsigned int chconfig;
60 int name;
61 };
62
63 struct usbmix_name_map;
64
65 struct mixer_build {
66 struct snd_usb_audio *chip;
67 struct usb_mixer_interface *mixer;
68 unsigned char *buffer;
69 unsigned int buflen;
70 DECLARE_BITMAP(unitbitmap, MAX_ID_ELEMS);
71 DECLARE_BITMAP(termbitmap, MAX_ID_ELEMS);
72 struct usb_audio_term oterm;
73 const struct usbmix_name_map *map;
74 const struct usbmix_selector_map *selector_map;
75 };
76
77 /*E-mu 0202/0404/0204 eXtension Unit(XU) control*/
78 enum {
79 USB_XU_CLOCK_RATE = 0xe301,
80 USB_XU_CLOCK_SOURCE = 0xe302,
81 USB_XU_DIGITAL_IO_STATUS = 0xe303,
82 USB_XU_DEVICE_OPTIONS = 0xe304,
83 USB_XU_DIRECT_MONITORING = 0xe305,
84 USB_XU_METERING = 0xe306
85 };
86 enum {
87 USB_XU_CLOCK_SOURCE_SELECTOR = 0x02, /* clock source*/
88 USB_XU_CLOCK_RATE_SELECTOR = 0x03, /* clock rate */
89 USB_XU_DIGITAL_FORMAT_SELECTOR = 0x01, /* the spdif format */
90 USB_XU_SOFT_LIMIT_SELECTOR = 0x03 /* soft limiter */
91 };
92
93 /*
94 * manual mapping of mixer names
95 * if the mixer topology is too complicated and the parsed names are
96 * ambiguous, add the entries in usbmixer_maps.c.
97 */
98 #include "mixer_maps.c"
99
100 static const struct usbmix_name_map *
find_map(const struct usbmix_name_map * p,int unitid,int control)101 find_map(const struct usbmix_name_map *p, int unitid, int control)
102 {
103 if (!p)
104 return NULL;
105
106 for (; p->id; p++) {
107 if (p->id == unitid &&
108 (!control || !p->control || control == p->control))
109 return p;
110 }
111 return NULL;
112 }
113
114 /* get the mapped name if the unit matches */
115 static int
check_mapped_name(const struct usbmix_name_map * p,char * buf,int buflen)116 check_mapped_name(const struct usbmix_name_map *p, char *buf, int buflen)
117 {
118 if (!p || !p->name)
119 return 0;
120
121 buflen--;
122 return strlcpy(buf, p->name, buflen);
123 }
124
125 /* ignore the error value if ignore_ctl_error flag is set */
126 #define filter_error(cval, err) \
127 ((cval)->head.mixer->ignore_ctl_error ? 0 : (err))
128
129 /* check whether the control should be ignored */
130 static inline int
check_ignored_ctl(const struct usbmix_name_map * p)131 check_ignored_ctl(const struct usbmix_name_map *p)
132 {
133 if (!p || p->name || p->dB)
134 return 0;
135 return 1;
136 }
137
138 /* dB mapping */
check_mapped_dB(const struct usbmix_name_map * p,struct usb_mixer_elem_info * cval)139 static inline void check_mapped_dB(const struct usbmix_name_map *p,
140 struct usb_mixer_elem_info *cval)
141 {
142 if (p && p->dB) {
143 cval->dBmin = p->dB->min;
144 cval->dBmax = p->dB->max;
145 cval->initialized = 1;
146 }
147 }
148
149 /* get the mapped selector source name */
check_mapped_selector_name(struct mixer_build * state,int unitid,int index,char * buf,int buflen)150 static int check_mapped_selector_name(struct mixer_build *state, int unitid,
151 int index, char *buf, int buflen)
152 {
153 const struct usbmix_selector_map *p;
154
155 if (!state->selector_map)
156 return 0;
157 for (p = state->selector_map; p->id; p++) {
158 if (p->id == unitid && index < p->count)
159 return strlcpy(buf, p->names[index], buflen);
160 }
161 return 0;
162 }
163
164 /*
165 * find an audio control unit with the given unit id
166 */
find_audio_control_unit(struct mixer_build * state,unsigned char unit)167 static void *find_audio_control_unit(struct mixer_build *state,
168 unsigned char unit)
169 {
170 /* we just parse the header */
171 struct uac_feature_unit_descriptor *hdr = NULL;
172
173 while ((hdr = snd_usb_find_desc(state->buffer, state->buflen, hdr,
174 USB_DT_CS_INTERFACE)) != NULL) {
175 if (hdr->bLength >= 4 &&
176 hdr->bDescriptorSubtype >= UAC_INPUT_TERMINAL &&
177 hdr->bDescriptorSubtype <= UAC3_SAMPLE_RATE_CONVERTER &&
178 hdr->bUnitID == unit)
179 return hdr;
180 }
181
182 return NULL;
183 }
184
185 /*
186 * copy a string with the given id
187 */
snd_usb_copy_string_desc(struct snd_usb_audio * chip,int index,char * buf,int maxlen)188 static int snd_usb_copy_string_desc(struct snd_usb_audio *chip,
189 int index, char *buf, int maxlen)
190 {
191 int len = usb_string(chip->dev, index, buf, maxlen - 1);
192
193 if (len < 0)
194 return 0;
195
196 buf[len] = 0;
197 return len;
198 }
199
200 /*
201 * convert from the byte/word on usb descriptor to the zero-based integer
202 */
convert_signed_value(struct usb_mixer_elem_info * cval,int val)203 static int convert_signed_value(struct usb_mixer_elem_info *cval, int val)
204 {
205 switch (cval->val_type) {
206 case USB_MIXER_BOOLEAN:
207 return !!val;
208 case USB_MIXER_INV_BOOLEAN:
209 return !val;
210 case USB_MIXER_U8:
211 val &= 0xff;
212 break;
213 case USB_MIXER_S8:
214 val &= 0xff;
215 if (val >= 0x80)
216 val -= 0x100;
217 break;
218 case USB_MIXER_U16:
219 val &= 0xffff;
220 break;
221 case USB_MIXER_S16:
222 val &= 0xffff;
223 if (val >= 0x8000)
224 val -= 0x10000;
225 break;
226 }
227 return val;
228 }
229
230 /*
231 * convert from the zero-based int to the byte/word for usb descriptor
232 */
convert_bytes_value(struct usb_mixer_elem_info * cval,int val)233 static int convert_bytes_value(struct usb_mixer_elem_info *cval, int val)
234 {
235 switch (cval->val_type) {
236 case USB_MIXER_BOOLEAN:
237 return !!val;
238 case USB_MIXER_INV_BOOLEAN:
239 return !val;
240 case USB_MIXER_S8:
241 case USB_MIXER_U8:
242 return val & 0xff;
243 case USB_MIXER_S16:
244 case USB_MIXER_U16:
245 return val & 0xffff;
246 }
247 return 0; /* not reached */
248 }
249
get_relative_value(struct usb_mixer_elem_info * cval,int val)250 static int get_relative_value(struct usb_mixer_elem_info *cval, int val)
251 {
252 if (!cval->res)
253 cval->res = 1;
254 if (val < cval->min)
255 return 0;
256 else if (val >= cval->max)
257 return (cval->max - cval->min + cval->res - 1) / cval->res;
258 else
259 return (val - cval->min) / cval->res;
260 }
261
get_abs_value(struct usb_mixer_elem_info * cval,int val)262 static int get_abs_value(struct usb_mixer_elem_info *cval, int val)
263 {
264 if (val < 0)
265 return cval->min;
266 if (!cval->res)
267 cval->res = 1;
268 val *= cval->res;
269 val += cval->min;
270 if (val > cval->max)
271 return cval->max;
272 return val;
273 }
274
uac2_ctl_value_size(int val_type)275 static int uac2_ctl_value_size(int val_type)
276 {
277 switch (val_type) {
278 case USB_MIXER_S32:
279 case USB_MIXER_U32:
280 return 4;
281 case USB_MIXER_S16:
282 case USB_MIXER_U16:
283 return 2;
284 default:
285 return 1;
286 }
287 return 0; /* unreachable */
288 }
289
290
291 /*
292 * retrieve a mixer value
293 */
294
get_ctl_value_v1(struct usb_mixer_elem_info * cval,int request,int validx,int * value_ret)295 static int get_ctl_value_v1(struct usb_mixer_elem_info *cval, int request,
296 int validx, int *value_ret)
297 {
298 struct snd_usb_audio *chip = cval->head.mixer->chip;
299 unsigned char buf[2];
300 int val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1;
301 int timeout = 10;
302 int idx = 0, err;
303
304 err = snd_usb_lock_shutdown(chip);
305 if (err < 0)
306 return -EIO;
307
308 while (timeout-- > 0) {
309 idx = snd_usb_ctrl_intf(chip) | (cval->head.id << 8);
310 err = snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), request,
311 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
312 validx, idx, buf, val_len);
313 if (err >= val_len) {
314 *value_ret = convert_signed_value(cval, snd_usb_combine_bytes(buf, val_len));
315 err = 0;
316 goto out;
317 } else if (err == -ETIMEDOUT) {
318 goto out;
319 }
320 }
321 usb_audio_dbg(chip,
322 "cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n",
323 request, validx, idx, cval->val_type);
324 err = -EINVAL;
325
326 out:
327 snd_usb_unlock_shutdown(chip);
328 return err;
329 }
330
get_ctl_value_v2(struct usb_mixer_elem_info * cval,int request,int validx,int * value_ret)331 static int get_ctl_value_v2(struct usb_mixer_elem_info *cval, int request,
332 int validx, int *value_ret)
333 {
334 struct snd_usb_audio *chip = cval->head.mixer->chip;
335 /* enough space for one range */
336 unsigned char buf[sizeof(__u16) + 3 * sizeof(__u32)];
337 unsigned char *val;
338 int idx = 0, ret, val_size, size;
339 __u8 bRequest;
340
341 val_size = uac2_ctl_value_size(cval->val_type);
342
343 if (request == UAC_GET_CUR) {
344 bRequest = UAC2_CS_CUR;
345 size = val_size;
346 } else {
347 bRequest = UAC2_CS_RANGE;
348 size = sizeof(__u16) + 3 * val_size;
349 }
350
351 memset(buf, 0, sizeof(buf));
352
353 ret = snd_usb_lock_shutdown(chip) ? -EIO : 0;
354 if (ret)
355 goto error;
356
357 idx = snd_usb_ctrl_intf(chip) | (cval->head.id << 8);
358 ret = snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), bRequest,
359 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
360 validx, idx, buf, size);
361 snd_usb_unlock_shutdown(chip);
362
363 if (ret < 0) {
364 error:
365 usb_audio_err(chip,
366 "cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n",
367 request, validx, idx, cval->val_type);
368 return ret;
369 }
370
371 /* FIXME: how should we handle multiple triplets here? */
372
373 switch (request) {
374 case UAC_GET_CUR:
375 val = buf;
376 break;
377 case UAC_GET_MIN:
378 val = buf + sizeof(__u16);
379 break;
380 case UAC_GET_MAX:
381 val = buf + sizeof(__u16) + val_size;
382 break;
383 case UAC_GET_RES:
384 val = buf + sizeof(__u16) + val_size * 2;
385 break;
386 default:
387 return -EINVAL;
388 }
389
390 *value_ret = convert_signed_value(cval,
391 snd_usb_combine_bytes(val, val_size));
392
393 return 0;
394 }
395
get_ctl_value(struct usb_mixer_elem_info * cval,int request,int validx,int * value_ret)396 static int get_ctl_value(struct usb_mixer_elem_info *cval, int request,
397 int validx, int *value_ret)
398 {
399 validx += cval->idx_off;
400
401 return (cval->head.mixer->protocol == UAC_VERSION_1) ?
402 get_ctl_value_v1(cval, request, validx, value_ret) :
403 get_ctl_value_v2(cval, request, validx, value_ret);
404 }
405
get_cur_ctl_value(struct usb_mixer_elem_info * cval,int validx,int * value)406 static int get_cur_ctl_value(struct usb_mixer_elem_info *cval,
407 int validx, int *value)
408 {
409 return get_ctl_value(cval, UAC_GET_CUR, validx, value);
410 }
411
412 /* channel = 0: master, 1 = first channel */
get_cur_mix_raw(struct usb_mixer_elem_info * cval,int channel,int * value)413 static inline int get_cur_mix_raw(struct usb_mixer_elem_info *cval,
414 int channel, int *value)
415 {
416 return get_ctl_value(cval, UAC_GET_CUR,
417 (cval->control << 8) | channel,
418 value);
419 }
420
snd_usb_get_cur_mix_value(struct usb_mixer_elem_info * cval,int channel,int index,int * value)421 int snd_usb_get_cur_mix_value(struct usb_mixer_elem_info *cval,
422 int channel, int index, int *value)
423 {
424 int err;
425
426 if (cval->cached & (1 << channel)) {
427 *value = cval->cache_val[index];
428 return 0;
429 }
430 err = get_cur_mix_raw(cval, channel, value);
431 if (err < 0) {
432 if (!cval->head.mixer->ignore_ctl_error)
433 usb_audio_dbg(cval->head.mixer->chip,
434 "cannot get current value for control %d ch %d: err = %d\n",
435 cval->control, channel, err);
436 return err;
437 }
438 cval->cached |= 1 << channel;
439 cval->cache_val[index] = *value;
440 return 0;
441 }
442
443 /*
444 * set a mixer value
445 */
446
snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info * cval,int request,int validx,int value_set)447 int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval,
448 int request, int validx, int value_set)
449 {
450 struct snd_usb_audio *chip = cval->head.mixer->chip;
451 unsigned char buf[4];
452 int idx = 0, val_len, err, timeout = 10;
453
454 validx += cval->idx_off;
455
456
457 if (cval->head.mixer->protocol == UAC_VERSION_1) {
458 val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1;
459 } else { /* UAC_VERSION_2/3 */
460 val_len = uac2_ctl_value_size(cval->val_type);
461
462 /* FIXME */
463 if (request != UAC_SET_CUR) {
464 usb_audio_dbg(chip, "RANGE setting not yet supported\n");
465 return -EINVAL;
466 }
467
468 request = UAC2_CS_CUR;
469 }
470
471 value_set = convert_bytes_value(cval, value_set);
472 buf[0] = value_set & 0xff;
473 buf[1] = (value_set >> 8) & 0xff;
474 buf[2] = (value_set >> 16) & 0xff;
475 buf[3] = (value_set >> 24) & 0xff;
476
477 err = snd_usb_lock_shutdown(chip);
478 if (err < 0)
479 return -EIO;
480
481 while (timeout-- > 0) {
482 idx = snd_usb_ctrl_intf(chip) | (cval->head.id << 8);
483 err = snd_usb_ctl_msg(chip->dev,
484 usb_sndctrlpipe(chip->dev, 0), request,
485 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
486 validx, idx, buf, val_len);
487 if (err >= 0) {
488 err = 0;
489 goto out;
490 } else if (err == -ETIMEDOUT) {
491 goto out;
492 }
493 }
494 usb_audio_dbg(chip, "cannot set ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d, data = %#x/%#x\n",
495 request, validx, idx, cval->val_type, buf[0], buf[1]);
496 err = -EINVAL;
497
498 out:
499 snd_usb_unlock_shutdown(chip);
500 return err;
501 }
502
set_cur_ctl_value(struct usb_mixer_elem_info * cval,int validx,int value)503 static int set_cur_ctl_value(struct usb_mixer_elem_info *cval,
504 int validx, int value)
505 {
506 return snd_usb_mixer_set_ctl_value(cval, UAC_SET_CUR, validx, value);
507 }
508
snd_usb_set_cur_mix_value(struct usb_mixer_elem_info * cval,int channel,int index,int value)509 int snd_usb_set_cur_mix_value(struct usb_mixer_elem_info *cval, int channel,
510 int index, int value)
511 {
512 int err;
513 unsigned int read_only = (channel == 0) ?
514 cval->master_readonly :
515 cval->ch_readonly & (1 << (channel - 1));
516
517 if (read_only) {
518 usb_audio_dbg(cval->head.mixer->chip,
519 "%s(): channel %d of control %d is read_only\n",
520 __func__, channel, cval->control);
521 return 0;
522 }
523
524 err = snd_usb_mixer_set_ctl_value(cval,
525 UAC_SET_CUR, (cval->control << 8) | channel,
526 value);
527 if (err < 0)
528 return err;
529 cval->cached |= 1 << channel;
530 cval->cache_val[index] = value;
531 return 0;
532 }
533
534 /*
535 * TLV callback for mixer volume controls
536 */
snd_usb_mixer_vol_tlv(struct snd_kcontrol * kcontrol,int op_flag,unsigned int size,unsigned int __user * _tlv)537 int snd_usb_mixer_vol_tlv(struct snd_kcontrol *kcontrol, int op_flag,
538 unsigned int size, unsigned int __user *_tlv)
539 {
540 struct usb_mixer_elem_info *cval = kcontrol->private_data;
541 DECLARE_TLV_DB_MINMAX(scale, 0, 0);
542
543 if (size < sizeof(scale))
544 return -ENOMEM;
545 if (cval->min_mute)
546 scale[0] = SNDRV_CTL_TLVT_DB_MINMAX_MUTE;
547 scale[2] = cval->dBmin;
548 scale[3] = cval->dBmax;
549 if (copy_to_user(_tlv, scale, sizeof(scale)))
550 return -EFAULT;
551 return 0;
552 }
553
554 /*
555 * parser routines begin here...
556 */
557
558 static int parse_audio_unit(struct mixer_build *state, int unitid);
559
560
561 /*
562 * check if the input/output channel routing is enabled on the given bitmap.
563 * used for mixer unit parser
564 */
check_matrix_bitmap(unsigned char * bmap,int ich,int och,int num_outs)565 static int check_matrix_bitmap(unsigned char *bmap,
566 int ich, int och, int num_outs)
567 {
568 int idx = ich * num_outs + och;
569 return bmap[idx >> 3] & (0x80 >> (idx & 7));
570 }
571
572 /*
573 * add an alsa control element
574 * search and increment the index until an empty slot is found.
575 *
576 * if failed, give up and free the control instance.
577 */
578
snd_usb_mixer_add_list(struct usb_mixer_elem_list * list,struct snd_kcontrol * kctl,bool is_std_info)579 int snd_usb_mixer_add_list(struct usb_mixer_elem_list *list,
580 struct snd_kcontrol *kctl,
581 bool is_std_info)
582 {
583 struct usb_mixer_interface *mixer = list->mixer;
584 int err;
585
586 while (snd_ctl_find_id(mixer->chip->card, &kctl->id))
587 kctl->id.index++;
588 err = snd_ctl_add(mixer->chip->card, kctl);
589 if (err < 0) {
590 usb_audio_dbg(mixer->chip, "cannot add control (err = %d)\n",
591 err);
592 return err;
593 }
594 list->kctl = kctl;
595 list->is_std_info = is_std_info;
596 list->next_id_elem = mixer->id_elems[list->id];
597 mixer->id_elems[list->id] = list;
598 return 0;
599 }
600
601 /*
602 * get a terminal name string
603 */
604
605 static struct iterm_name_combo {
606 int type;
607 char *name;
608 } iterm_names[] = {
609 { 0x0300, "Output" },
610 { 0x0301, "Speaker" },
611 { 0x0302, "Headphone" },
612 { 0x0303, "HMD Audio" },
613 { 0x0304, "Desktop Speaker" },
614 { 0x0305, "Room Speaker" },
615 { 0x0306, "Com Speaker" },
616 { 0x0307, "LFE" },
617 { 0x0600, "External In" },
618 { 0x0601, "Analog In" },
619 { 0x0602, "Digital In" },
620 { 0x0603, "Line" },
621 { 0x0604, "Legacy In" },
622 { 0x0605, "IEC958 In" },
623 { 0x0606, "1394 DA Stream" },
624 { 0x0607, "1394 DV Stream" },
625 { 0x0700, "Embedded" },
626 { 0x0701, "Noise Source" },
627 { 0x0702, "Equalization Noise" },
628 { 0x0703, "CD" },
629 { 0x0704, "DAT" },
630 { 0x0705, "DCC" },
631 { 0x0706, "MiniDisk" },
632 { 0x0707, "Analog Tape" },
633 { 0x0708, "Phonograph" },
634 { 0x0709, "VCR Audio" },
635 { 0x070a, "Video Disk Audio" },
636 { 0x070b, "DVD Audio" },
637 { 0x070c, "TV Tuner Audio" },
638 { 0x070d, "Satellite Rec Audio" },
639 { 0x070e, "Cable Tuner Audio" },
640 { 0x070f, "DSS Audio" },
641 { 0x0710, "Radio Receiver" },
642 { 0x0711, "Radio Transmitter" },
643 { 0x0712, "Multi-Track Recorder" },
644 { 0x0713, "Synthesizer" },
645 { 0 },
646 };
647
get_term_name(struct snd_usb_audio * chip,struct usb_audio_term * iterm,unsigned char * name,int maxlen,int term_only)648 static int get_term_name(struct snd_usb_audio *chip, struct usb_audio_term *iterm,
649 unsigned char *name, int maxlen, int term_only)
650 {
651 struct iterm_name_combo *names;
652 int len;
653
654 if (iterm->name) {
655 len = snd_usb_copy_string_desc(chip, iterm->name,
656 name, maxlen);
657 if (len)
658 return len;
659 }
660
661 /* virtual type - not a real terminal */
662 if (iterm->type >> 16) {
663 if (term_only)
664 return 0;
665 switch (iterm->type >> 16) {
666 case UAC3_SELECTOR_UNIT:
667 strcpy(name, "Selector");
668 return 8;
669 case UAC3_PROCESSING_UNIT:
670 strcpy(name, "Process Unit");
671 return 12;
672 case UAC3_EXTENSION_UNIT:
673 strcpy(name, "Ext Unit");
674 return 8;
675 case UAC3_MIXER_UNIT:
676 strcpy(name, "Mixer");
677 return 5;
678 default:
679 return sprintf(name, "Unit %d", iterm->id);
680 }
681 }
682
683 switch (iterm->type & 0xff00) {
684 case 0x0100:
685 strcpy(name, "PCM");
686 return 3;
687 case 0x0200:
688 strcpy(name, "Mic");
689 return 3;
690 case 0x0400:
691 strcpy(name, "Headset");
692 return 7;
693 case 0x0500:
694 strcpy(name, "Phone");
695 return 5;
696 }
697
698 for (names = iterm_names; names->type; names++) {
699 if (names->type == iterm->type) {
700 strcpy(name, names->name);
701 return strlen(names->name);
702 }
703 }
704
705 return 0;
706 }
707
708 /*
709 * Get logical cluster information for UAC3 devices.
710 */
get_cluster_channels_v3(struct mixer_build * state,unsigned int cluster_id)711 static int get_cluster_channels_v3(struct mixer_build *state, unsigned int cluster_id)
712 {
713 struct uac3_cluster_header_descriptor c_header;
714 int err;
715
716 err = snd_usb_ctl_msg(state->chip->dev,
717 usb_rcvctrlpipe(state->chip->dev, 0),
718 UAC3_CS_REQ_HIGH_CAPABILITY_DESCRIPTOR,
719 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
720 cluster_id,
721 snd_usb_ctrl_intf(state->chip),
722 &c_header, sizeof(c_header));
723 if (err < 0)
724 goto error;
725 if (err != sizeof(c_header)) {
726 err = -EIO;
727 goto error;
728 }
729
730 return c_header.bNrChannels;
731
732 error:
733 usb_audio_err(state->chip, "cannot request logical cluster ID: %d (err: %d)\n", cluster_id, err);
734 return err;
735 }
736
737 /*
738 * Get number of channels for a Mixer Unit.
739 */
uac_mixer_unit_get_channels(struct mixer_build * state,struct uac_mixer_unit_descriptor * desc)740 static int uac_mixer_unit_get_channels(struct mixer_build *state,
741 struct uac_mixer_unit_descriptor *desc)
742 {
743 int mu_channels;
744
745 switch (state->mixer->protocol) {
746 case UAC_VERSION_1:
747 case UAC_VERSION_2:
748 default:
749 if (desc->bLength < sizeof(*desc) + desc->bNrInPins + 1)
750 return 0; /* no bmControls -> skip */
751 mu_channels = uac_mixer_unit_bNrChannels(desc);
752 break;
753 case UAC_VERSION_3:
754 mu_channels = get_cluster_channels_v3(state,
755 uac3_mixer_unit_wClusterDescrID(desc));
756 break;
757 }
758
759 return mu_channels;
760 }
761
762 /*
763 * Parse Input Terminal Unit
764 */
765 static int __check_input_term(struct mixer_build *state, int id,
766 struct usb_audio_term *term);
767
parse_term_uac1_iterm_unit(struct mixer_build * state,struct usb_audio_term * term,void * p1,int id)768 static int parse_term_uac1_iterm_unit(struct mixer_build *state,
769 struct usb_audio_term *term,
770 void *p1, int id)
771 {
772 struct uac_input_terminal_descriptor *d = p1;
773
774 term->type = le16_to_cpu(d->wTerminalType);
775 term->channels = d->bNrChannels;
776 term->chconfig = le16_to_cpu(d->wChannelConfig);
777 term->name = d->iTerminal;
778 return 0;
779 }
780
parse_term_uac2_iterm_unit(struct mixer_build * state,struct usb_audio_term * term,void * p1,int id)781 static int parse_term_uac2_iterm_unit(struct mixer_build *state,
782 struct usb_audio_term *term,
783 void *p1, int id)
784 {
785 struct uac2_input_terminal_descriptor *d = p1;
786 int err;
787
788 /* call recursively to verify the referenced clock entity */
789 err = __check_input_term(state, d->bCSourceID, term);
790 if (err < 0)
791 return err;
792
793 /* save input term properties after recursion,
794 * to ensure they are not overriden by the recursion calls
795 */
796 term->id = id;
797 term->type = le16_to_cpu(d->wTerminalType);
798 term->channels = d->bNrChannels;
799 term->chconfig = le32_to_cpu(d->bmChannelConfig);
800 term->name = d->iTerminal;
801 return 0;
802 }
803
parse_term_uac3_iterm_unit(struct mixer_build * state,struct usb_audio_term * term,void * p1,int id)804 static int parse_term_uac3_iterm_unit(struct mixer_build *state,
805 struct usb_audio_term *term,
806 void *p1, int id)
807 {
808 struct uac3_input_terminal_descriptor *d = p1;
809 int err;
810
811 /* call recursively to verify the referenced clock entity */
812 err = __check_input_term(state, d->bCSourceID, term);
813 if (err < 0)
814 return err;
815
816 /* save input term properties after recursion,
817 * to ensure they are not overriden by the recursion calls
818 */
819 term->id = id;
820 term->type = le16_to_cpu(d->wTerminalType);
821
822 err = get_cluster_channels_v3(state, le16_to_cpu(d->wClusterDescrID));
823 if (err < 0)
824 return err;
825 term->channels = err;
826
827 /* REVISIT: UAC3 IT doesn't have channels cfg */
828 term->chconfig = 0;
829
830 term->name = le16_to_cpu(d->wTerminalDescrStr);
831 return 0;
832 }
833
parse_term_mixer_unit(struct mixer_build * state,struct usb_audio_term * term,void * p1,int id)834 static int parse_term_mixer_unit(struct mixer_build *state,
835 struct usb_audio_term *term,
836 void *p1, int id)
837 {
838 struct uac_mixer_unit_descriptor *d = p1;
839 int protocol = state->mixer->protocol;
840 int err;
841
842 err = uac_mixer_unit_get_channels(state, d);
843 if (err <= 0)
844 return err;
845
846 term->type = UAC3_MIXER_UNIT << 16; /* virtual type */
847 term->channels = err;
848 if (protocol != UAC_VERSION_3) {
849 term->chconfig = uac_mixer_unit_wChannelConfig(d, protocol);
850 term->name = uac_mixer_unit_iMixer(d);
851 }
852 return 0;
853 }
854
parse_term_selector_unit(struct mixer_build * state,struct usb_audio_term * term,void * p1,int id)855 static int parse_term_selector_unit(struct mixer_build *state,
856 struct usb_audio_term *term,
857 void *p1, int id)
858 {
859 struct uac_selector_unit_descriptor *d = p1;
860 int err;
861
862 /* call recursively to retrieve the channel info */
863 err = __check_input_term(state, d->baSourceID[0], term);
864 if (err < 0)
865 return err;
866 term->type = UAC3_SELECTOR_UNIT << 16; /* virtual type */
867 term->id = id;
868 if (state->mixer->protocol != UAC_VERSION_3)
869 term->name = uac_selector_unit_iSelector(d);
870 return 0;
871 }
872
parse_term_proc_unit(struct mixer_build * state,struct usb_audio_term * term,void * p1,int id,int vtype)873 static int parse_term_proc_unit(struct mixer_build *state,
874 struct usb_audio_term *term,
875 void *p1, int id, int vtype)
876 {
877 struct uac_processing_unit_descriptor *d = p1;
878 int protocol = state->mixer->protocol;
879 int err;
880
881 if (d->bNrInPins) {
882 /* call recursively to retrieve the channel info */
883 err = __check_input_term(state, d->baSourceID[0], term);
884 if (err < 0)
885 return err;
886 }
887
888 term->type = vtype << 16; /* virtual type */
889 term->id = id;
890
891 if (protocol == UAC_VERSION_3)
892 return 0;
893
894 if (!term->channels) {
895 term->channels = uac_processing_unit_bNrChannels(d);
896 term->chconfig = uac_processing_unit_wChannelConfig(d, protocol);
897 }
898 term->name = uac_processing_unit_iProcessing(d, protocol);
899 return 0;
900 }
901
parse_term_effect_unit(struct mixer_build * state,struct usb_audio_term * term,void * p1,int id)902 static int parse_term_effect_unit(struct mixer_build *state,
903 struct usb_audio_term *term,
904 void *p1, int id)
905 {
906 term->type = UAC3_EFFECT_UNIT << 16; /* virtual type */
907 term->id = id;
908 return 0;
909 }
910
parse_term_uac2_clock_source(struct mixer_build * state,struct usb_audio_term * term,void * p1,int id)911 static int parse_term_uac2_clock_source(struct mixer_build *state,
912 struct usb_audio_term *term,
913 void *p1, int id)
914 {
915 struct uac_clock_source_descriptor *d = p1;
916
917 term->type = UAC3_CLOCK_SOURCE << 16; /* virtual type */
918 term->id = id;
919 term->name = d->iClockSource;
920 return 0;
921 }
922
parse_term_uac3_clock_source(struct mixer_build * state,struct usb_audio_term * term,void * p1,int id)923 static int parse_term_uac3_clock_source(struct mixer_build *state,
924 struct usb_audio_term *term,
925 void *p1, int id)
926 {
927 struct uac3_clock_source_descriptor *d = p1;
928
929 term->type = UAC3_CLOCK_SOURCE << 16; /* virtual type */
930 term->id = id;
931 term->name = le16_to_cpu(d->wClockSourceStr);
932 return 0;
933 }
934
935 #define PTYPE(a, b) ((a) << 8 | (b))
936
937 /*
938 * parse the source unit recursively until it reaches to a terminal
939 * or a branched unit.
940 */
__check_input_term(struct mixer_build * state,int id,struct usb_audio_term * term)941 static int __check_input_term(struct mixer_build *state, int id,
942 struct usb_audio_term *term)
943 {
944 int protocol = state->mixer->protocol;
945 void *p1;
946 unsigned char *hdr;
947
948 for (;;) {
949 /* a loop in the terminal chain? */
950 if (test_and_set_bit(id, state->termbitmap))
951 return -EINVAL;
952
953 p1 = find_audio_control_unit(state, id);
954 if (!p1)
955 break;
956 if (!snd_usb_validate_audio_desc(p1, protocol))
957 break; /* bad descriptor */
958
959 hdr = p1;
960 term->id = id;
961
962 switch (PTYPE(protocol, hdr[2])) {
963 case PTYPE(UAC_VERSION_1, UAC_FEATURE_UNIT):
964 case PTYPE(UAC_VERSION_2, UAC_FEATURE_UNIT):
965 case PTYPE(UAC_VERSION_3, UAC3_FEATURE_UNIT): {
966 /* the header is the same for all versions */
967 struct uac_feature_unit_descriptor *d = p1;
968
969 id = d->bSourceID;
970 break; /* continue to parse */
971 }
972 case PTYPE(UAC_VERSION_1, UAC_INPUT_TERMINAL):
973 return parse_term_uac1_iterm_unit(state, term, p1, id);
974 case PTYPE(UAC_VERSION_2, UAC_INPUT_TERMINAL):
975 return parse_term_uac2_iterm_unit(state, term, p1, id);
976 case PTYPE(UAC_VERSION_3, UAC_INPUT_TERMINAL):
977 return parse_term_uac3_iterm_unit(state, term, p1, id);
978 case PTYPE(UAC_VERSION_1, UAC_MIXER_UNIT):
979 case PTYPE(UAC_VERSION_2, UAC_MIXER_UNIT):
980 case PTYPE(UAC_VERSION_3, UAC3_MIXER_UNIT):
981 return parse_term_mixer_unit(state, term, p1, id);
982 case PTYPE(UAC_VERSION_1, UAC_SELECTOR_UNIT):
983 case PTYPE(UAC_VERSION_2, UAC_SELECTOR_UNIT):
984 case PTYPE(UAC_VERSION_2, UAC2_CLOCK_SELECTOR):
985 case PTYPE(UAC_VERSION_3, UAC3_SELECTOR_UNIT):
986 case PTYPE(UAC_VERSION_3, UAC3_CLOCK_SELECTOR):
987 return parse_term_selector_unit(state, term, p1, id);
988 case PTYPE(UAC_VERSION_1, UAC1_PROCESSING_UNIT):
989 case PTYPE(UAC_VERSION_2, UAC2_PROCESSING_UNIT_V2):
990 case PTYPE(UAC_VERSION_3, UAC3_PROCESSING_UNIT):
991 return parse_term_proc_unit(state, term, p1, id,
992 UAC3_PROCESSING_UNIT);
993 case PTYPE(UAC_VERSION_2, UAC2_EFFECT_UNIT):
994 case PTYPE(UAC_VERSION_3, UAC3_EFFECT_UNIT):
995 return parse_term_effect_unit(state, term, p1, id);
996 case PTYPE(UAC_VERSION_1, UAC1_EXTENSION_UNIT):
997 case PTYPE(UAC_VERSION_2, UAC2_EXTENSION_UNIT_V2):
998 case PTYPE(UAC_VERSION_3, UAC3_EXTENSION_UNIT):
999 return parse_term_proc_unit(state, term, p1, id,
1000 UAC3_EXTENSION_UNIT);
1001 case PTYPE(UAC_VERSION_2, UAC2_CLOCK_SOURCE):
1002 return parse_term_uac2_clock_source(state, term, p1, id);
1003 case PTYPE(UAC_VERSION_3, UAC3_CLOCK_SOURCE):
1004 return parse_term_uac3_clock_source(state, term, p1, id);
1005 default:
1006 return -ENODEV;
1007 }
1008 }
1009 return -ENODEV;
1010 }
1011
1012
check_input_term(struct mixer_build * state,int id,struct usb_audio_term * term)1013 static int check_input_term(struct mixer_build *state, int id,
1014 struct usb_audio_term *term)
1015 {
1016 memset(term, 0, sizeof(*term));
1017 memset(state->termbitmap, 0, sizeof(state->termbitmap));
1018 return __check_input_term(state, id, term);
1019 }
1020
1021 /*
1022 * Feature Unit
1023 */
1024
1025 /* feature unit control information */
1026 struct usb_feature_control_info {
1027 int control;
1028 const char *name;
1029 int type; /* data type for uac1 */
1030 int type_uac2; /* data type for uac2 if different from uac1, else -1 */
1031 };
1032
1033 static const struct usb_feature_control_info audio_feature_info[] = {
1034 { UAC_FU_MUTE, "Mute", USB_MIXER_INV_BOOLEAN, -1 },
1035 { UAC_FU_VOLUME, "Volume", USB_MIXER_S16, -1 },
1036 { UAC_FU_BASS, "Tone Control - Bass", USB_MIXER_S8, -1 },
1037 { UAC_FU_MID, "Tone Control - Mid", USB_MIXER_S8, -1 },
1038 { UAC_FU_TREBLE, "Tone Control - Treble", USB_MIXER_S8, -1 },
1039 { UAC_FU_GRAPHIC_EQUALIZER, "Graphic Equalizer", USB_MIXER_S8, -1 }, /* FIXME: not implemented yet */
1040 { UAC_FU_AUTOMATIC_GAIN, "Auto Gain Control", USB_MIXER_BOOLEAN, -1 },
1041 { UAC_FU_DELAY, "Delay Control", USB_MIXER_U16, USB_MIXER_U32 },
1042 { UAC_FU_BASS_BOOST, "Bass Boost", USB_MIXER_BOOLEAN, -1 },
1043 { UAC_FU_LOUDNESS, "Loudness", USB_MIXER_BOOLEAN, -1 },
1044 /* UAC2 specific */
1045 { UAC2_FU_INPUT_GAIN, "Input Gain Control", USB_MIXER_S16, -1 },
1046 { UAC2_FU_INPUT_GAIN_PAD, "Input Gain Pad Control", USB_MIXER_S16, -1 },
1047 { UAC2_FU_PHASE_INVERTER, "Phase Inverter Control", USB_MIXER_BOOLEAN, -1 },
1048 };
1049
usb_mixer_elem_info_free(struct usb_mixer_elem_info * cval)1050 static void usb_mixer_elem_info_free(struct usb_mixer_elem_info *cval)
1051 {
1052 kfree(cval);
1053 }
1054
1055 /* private_free callback */
snd_usb_mixer_elem_free(struct snd_kcontrol * kctl)1056 void snd_usb_mixer_elem_free(struct snd_kcontrol *kctl)
1057 {
1058 usb_mixer_elem_info_free(kctl->private_data);
1059 kctl->private_data = NULL;
1060 }
1061
1062 /*
1063 * interface to ALSA control for feature/mixer units
1064 */
1065
1066 /* volume control quirks */
volume_control_quirks(struct usb_mixer_elem_info * cval,struct snd_kcontrol * kctl)1067 static void volume_control_quirks(struct usb_mixer_elem_info *cval,
1068 struct snd_kcontrol *kctl)
1069 {
1070 struct snd_usb_audio *chip = cval->head.mixer->chip;
1071 switch (chip->usb_id) {
1072 case USB_ID(0x0763, 0x2030): /* M-Audio Fast Track C400 */
1073 case USB_ID(0x0763, 0x2031): /* M-Audio Fast Track C600 */
1074 if (strcmp(kctl->id.name, "Effect Duration") == 0) {
1075 cval->min = 0x0000;
1076 cval->max = 0xffff;
1077 cval->res = 0x00e6;
1078 break;
1079 }
1080 if (strcmp(kctl->id.name, "Effect Volume") == 0 ||
1081 strcmp(kctl->id.name, "Effect Feedback Volume") == 0) {
1082 cval->min = 0x00;
1083 cval->max = 0xff;
1084 break;
1085 }
1086 if (strstr(kctl->id.name, "Effect Return") != NULL) {
1087 cval->min = 0xb706;
1088 cval->max = 0xff7b;
1089 cval->res = 0x0073;
1090 break;
1091 }
1092 if ((strstr(kctl->id.name, "Playback Volume") != NULL) ||
1093 (strstr(kctl->id.name, "Effect Send") != NULL)) {
1094 cval->min = 0xb5fb; /* -73 dB = 0xb6ff */
1095 cval->max = 0xfcfe;
1096 cval->res = 0x0073;
1097 }
1098 break;
1099
1100 case USB_ID(0x0763, 0x2081): /* M-Audio Fast Track Ultra 8R */
1101 case USB_ID(0x0763, 0x2080): /* M-Audio Fast Track Ultra */
1102 if (strcmp(kctl->id.name, "Effect Duration") == 0) {
1103 usb_audio_info(chip,
1104 "set quirk for FTU Effect Duration\n");
1105 cval->min = 0x0000;
1106 cval->max = 0x7f00;
1107 cval->res = 0x0100;
1108 break;
1109 }
1110 if (strcmp(kctl->id.name, "Effect Volume") == 0 ||
1111 strcmp(kctl->id.name, "Effect Feedback Volume") == 0) {
1112 usb_audio_info(chip,
1113 "set quirks for FTU Effect Feedback/Volume\n");
1114 cval->min = 0x00;
1115 cval->max = 0x7f;
1116 break;
1117 }
1118 break;
1119
1120 case USB_ID(0x0d8c, 0x0103):
1121 if (!strcmp(kctl->id.name, "PCM Playback Volume")) {
1122 usb_audio_info(chip,
1123 "set volume quirk for CM102-A+/102S+\n");
1124 cval->min = -256;
1125 }
1126 break;
1127
1128 case USB_ID(0x0471, 0x0101):
1129 case USB_ID(0x0471, 0x0104):
1130 case USB_ID(0x0471, 0x0105):
1131 case USB_ID(0x0672, 0x1041):
1132 /* quirk for UDA1321/N101.
1133 * note that detection between firmware 2.1.1.7 (N101)
1134 * and later 2.1.1.21 is not very clear from datasheets.
1135 * I hope that the min value is -15360 for newer firmware --jk
1136 */
1137 if (!strcmp(kctl->id.name, "PCM Playback Volume") &&
1138 cval->min == -15616) {
1139 usb_audio_info(chip,
1140 "set volume quirk for UDA1321/N101 chip\n");
1141 cval->max = -256;
1142 }
1143 break;
1144
1145 case USB_ID(0x046d, 0x09a4):
1146 if (!strcmp(kctl->id.name, "Mic Capture Volume")) {
1147 usb_audio_info(chip,
1148 "set volume quirk for QuickCam E3500\n");
1149 cval->min = 6080;
1150 cval->max = 8768;
1151 cval->res = 192;
1152 }
1153 break;
1154
1155 case USB_ID(0x046d, 0x0807): /* Logitech Webcam C500 */
1156 case USB_ID(0x046d, 0x0808):
1157 case USB_ID(0x046d, 0x0809):
1158 case USB_ID(0x046d, 0x0819): /* Logitech Webcam C210 */
1159 case USB_ID(0x046d, 0x081b): /* HD Webcam c310 */
1160 case USB_ID(0x046d, 0x081d): /* HD Webcam c510 */
1161 case USB_ID(0x046d, 0x0825): /* HD Webcam c270 */
1162 case USB_ID(0x046d, 0x0826): /* HD Webcam c525 */
1163 case USB_ID(0x046d, 0x08ca): /* Logitech Quickcam Fusion */
1164 case USB_ID(0x046d, 0x0991):
1165 case USB_ID(0x046d, 0x09a2): /* QuickCam Communicate Deluxe/S7500 */
1166 /* Most audio usb devices lie about volume resolution.
1167 * Most Logitech webcams have res = 384.
1168 * Probably there is some logitech magic behind this number --fishor
1169 */
1170 if (!strcmp(kctl->id.name, "Mic Capture Volume")) {
1171 usb_audio_info(chip,
1172 "set resolution quirk: cval->res = 384\n");
1173 cval->res = 384;
1174 }
1175 break;
1176 case USB_ID(0x0495, 0x3042): /* ESS Technology Asus USB DAC */
1177 if ((strstr(kctl->id.name, "Playback Volume") != NULL) ||
1178 strstr(kctl->id.name, "Capture Volume") != NULL) {
1179 cval->min >>= 8;
1180 cval->max = 0;
1181 cval->res = 1;
1182 }
1183 break;
1184 }
1185 }
1186
1187 /*
1188 * retrieve the minimum and maximum values for the specified control
1189 */
get_min_max_with_quirks(struct usb_mixer_elem_info * cval,int default_min,struct snd_kcontrol * kctl)1190 static int get_min_max_with_quirks(struct usb_mixer_elem_info *cval,
1191 int default_min, struct snd_kcontrol *kctl)
1192 {
1193 /* for failsafe */
1194 cval->min = default_min;
1195 cval->max = cval->min + 1;
1196 cval->res = 1;
1197 cval->dBmin = cval->dBmax = 0;
1198
1199 if (cval->val_type == USB_MIXER_BOOLEAN ||
1200 cval->val_type == USB_MIXER_INV_BOOLEAN) {
1201 cval->initialized = 1;
1202 } else {
1203 int minchn = 0;
1204 if (cval->cmask) {
1205 int i;
1206 for (i = 0; i < MAX_CHANNELS; i++)
1207 if (cval->cmask & (1 << i)) {
1208 minchn = i + 1;
1209 break;
1210 }
1211 }
1212 if (get_ctl_value(cval, UAC_GET_MAX, (cval->control << 8) | minchn, &cval->max) < 0 ||
1213 get_ctl_value(cval, UAC_GET_MIN, (cval->control << 8) | minchn, &cval->min) < 0) {
1214 usb_audio_err(cval->head.mixer->chip,
1215 "%d:%d: cannot get min/max values for control %d (id %d)\n",
1216 cval->head.id, snd_usb_ctrl_intf(cval->head.mixer->chip),
1217 cval->control, cval->head.id);
1218 return -EINVAL;
1219 }
1220 if (get_ctl_value(cval, UAC_GET_RES,
1221 (cval->control << 8) | minchn,
1222 &cval->res) < 0) {
1223 cval->res = 1;
1224 } else {
1225 int last_valid_res = cval->res;
1226
1227 while (cval->res > 1) {
1228 if (snd_usb_mixer_set_ctl_value(cval, UAC_SET_RES,
1229 (cval->control << 8) | minchn,
1230 cval->res / 2) < 0)
1231 break;
1232 cval->res /= 2;
1233 }
1234 if (get_ctl_value(cval, UAC_GET_RES,
1235 (cval->control << 8) | minchn, &cval->res) < 0)
1236 cval->res = last_valid_res;
1237 }
1238 if (cval->res == 0)
1239 cval->res = 1;
1240
1241 /* Additional checks for the proper resolution
1242 *
1243 * Some devices report smaller resolutions than actually
1244 * reacting. They don't return errors but simply clip
1245 * to the lower aligned value.
1246 */
1247 if (cval->min + cval->res < cval->max) {
1248 int last_valid_res = cval->res;
1249 int saved, test, check;
1250 if (get_cur_mix_raw(cval, minchn, &saved) < 0)
1251 goto no_res_check;
1252 for (;;) {
1253 test = saved;
1254 if (test < cval->max)
1255 test += cval->res;
1256 else
1257 test -= cval->res;
1258 if (test < cval->min || test > cval->max ||
1259 snd_usb_set_cur_mix_value(cval, minchn, 0, test) ||
1260 get_cur_mix_raw(cval, minchn, &check)) {
1261 cval->res = last_valid_res;
1262 break;
1263 }
1264 if (test == check)
1265 break;
1266 cval->res *= 2;
1267 }
1268 snd_usb_set_cur_mix_value(cval, minchn, 0, saved);
1269 }
1270
1271 no_res_check:
1272 cval->initialized = 1;
1273 }
1274
1275 if (kctl)
1276 volume_control_quirks(cval, kctl);
1277
1278 /* USB descriptions contain the dB scale in 1/256 dB unit
1279 * while ALSA TLV contains in 1/100 dB unit
1280 */
1281 cval->dBmin = (convert_signed_value(cval, cval->min) * 100) / 256;
1282 cval->dBmax = (convert_signed_value(cval, cval->max) * 100) / 256;
1283 if (cval->dBmin > cval->dBmax) {
1284 /* something is wrong; assume it's either from/to 0dB */
1285 if (cval->dBmin < 0)
1286 cval->dBmax = 0;
1287 else if (cval->dBmin > 0)
1288 cval->dBmin = 0;
1289 if (cval->dBmin > cval->dBmax) {
1290 /* totally crap, return an error */
1291 return -EINVAL;
1292 }
1293 }
1294
1295 return 0;
1296 }
1297
1298 #define get_min_max(cval, def) get_min_max_with_quirks(cval, def, NULL)
1299
1300 /* get a feature/mixer unit info */
mixer_ctl_feature_info(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_info * uinfo)1301 static int mixer_ctl_feature_info(struct snd_kcontrol *kcontrol,
1302 struct snd_ctl_elem_info *uinfo)
1303 {
1304 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1305
1306 if (cval->val_type == USB_MIXER_BOOLEAN ||
1307 cval->val_type == USB_MIXER_INV_BOOLEAN)
1308 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1309 else
1310 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
1311 uinfo->count = cval->channels;
1312 if (cval->val_type == USB_MIXER_BOOLEAN ||
1313 cval->val_type == USB_MIXER_INV_BOOLEAN) {
1314 uinfo->value.integer.min = 0;
1315 uinfo->value.integer.max = 1;
1316 } else {
1317 if (!cval->initialized) {
1318 get_min_max_with_quirks(cval, 0, kcontrol);
1319 if (cval->initialized && cval->dBmin >= cval->dBmax) {
1320 kcontrol->vd[0].access &=
1321 ~(SNDRV_CTL_ELEM_ACCESS_TLV_READ |
1322 SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK);
1323 snd_ctl_notify(cval->head.mixer->chip->card,
1324 SNDRV_CTL_EVENT_MASK_INFO,
1325 &kcontrol->id);
1326 }
1327 }
1328 uinfo->value.integer.min = 0;
1329 uinfo->value.integer.max =
1330 (cval->max - cval->min + cval->res - 1) / cval->res;
1331 }
1332 return 0;
1333 }
1334
1335 /* get the current value from feature/mixer unit */
mixer_ctl_feature_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)1336 static int mixer_ctl_feature_get(struct snd_kcontrol *kcontrol,
1337 struct snd_ctl_elem_value *ucontrol)
1338 {
1339 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1340 int c, cnt, val, err;
1341
1342 ucontrol->value.integer.value[0] = cval->min;
1343 if (cval->cmask) {
1344 cnt = 0;
1345 for (c = 0; c < MAX_CHANNELS; c++) {
1346 if (!(cval->cmask & (1 << c)))
1347 continue;
1348 err = snd_usb_get_cur_mix_value(cval, c + 1, cnt, &val);
1349 if (err < 0)
1350 return filter_error(cval, err);
1351 val = get_relative_value(cval, val);
1352 ucontrol->value.integer.value[cnt] = val;
1353 cnt++;
1354 }
1355 return 0;
1356 } else {
1357 /* master channel */
1358 err = snd_usb_get_cur_mix_value(cval, 0, 0, &val);
1359 if (err < 0)
1360 return filter_error(cval, err);
1361 val = get_relative_value(cval, val);
1362 ucontrol->value.integer.value[0] = val;
1363 }
1364 return 0;
1365 }
1366
1367 /* put the current value to feature/mixer unit */
mixer_ctl_feature_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)1368 static int mixer_ctl_feature_put(struct snd_kcontrol *kcontrol,
1369 struct snd_ctl_elem_value *ucontrol)
1370 {
1371 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1372 int c, cnt, val, oval, err;
1373 int changed = 0;
1374
1375 if (cval->cmask) {
1376 cnt = 0;
1377 for (c = 0; c < MAX_CHANNELS; c++) {
1378 if (!(cval->cmask & (1 << c)))
1379 continue;
1380 err = snd_usb_get_cur_mix_value(cval, c + 1, cnt, &oval);
1381 if (err < 0)
1382 return filter_error(cval, err);
1383 val = ucontrol->value.integer.value[cnt];
1384 val = get_abs_value(cval, val);
1385 if (oval != val) {
1386 snd_usb_set_cur_mix_value(cval, c + 1, cnt, val);
1387 changed = 1;
1388 }
1389 cnt++;
1390 }
1391 } else {
1392 /* master channel */
1393 err = snd_usb_get_cur_mix_value(cval, 0, 0, &oval);
1394 if (err < 0)
1395 return filter_error(cval, err);
1396 val = ucontrol->value.integer.value[0];
1397 val = get_abs_value(cval, val);
1398 if (val != oval) {
1399 snd_usb_set_cur_mix_value(cval, 0, 0, val);
1400 changed = 1;
1401 }
1402 }
1403 return changed;
1404 }
1405
1406 /* get the boolean value from the master channel of a UAC control */
mixer_ctl_master_bool_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)1407 static int mixer_ctl_master_bool_get(struct snd_kcontrol *kcontrol,
1408 struct snd_ctl_elem_value *ucontrol)
1409 {
1410 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1411 int val, err;
1412
1413 err = snd_usb_get_cur_mix_value(cval, 0, 0, &val);
1414 if (err < 0)
1415 return filter_error(cval, err);
1416 val = (val != 0);
1417 ucontrol->value.integer.value[0] = val;
1418 return 0;
1419 }
1420
1421 /* get the connectors status and report it as boolean type */
mixer_ctl_connector_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)1422 static int mixer_ctl_connector_get(struct snd_kcontrol *kcontrol,
1423 struct snd_ctl_elem_value *ucontrol)
1424 {
1425 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1426 struct snd_usb_audio *chip = cval->head.mixer->chip;
1427 int idx = 0, validx, ret, val;
1428
1429 validx = cval->control << 8 | 0;
1430
1431 ret = snd_usb_lock_shutdown(chip) ? -EIO : 0;
1432 if (ret)
1433 goto error;
1434
1435 idx = snd_usb_ctrl_intf(chip) | (cval->head.id << 8);
1436 if (cval->head.mixer->protocol == UAC_VERSION_2) {
1437 struct uac2_connectors_ctl_blk uac2_conn;
1438
1439 ret = snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), UAC2_CS_CUR,
1440 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
1441 validx, idx, &uac2_conn, sizeof(uac2_conn));
1442 val = !!uac2_conn.bNrChannels;
1443 } else { /* UAC_VERSION_3 */
1444 struct uac3_insertion_ctl_blk uac3_conn;
1445
1446 ret = snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), UAC2_CS_CUR,
1447 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
1448 validx, idx, &uac3_conn, sizeof(uac3_conn));
1449 val = !!uac3_conn.bmConInserted;
1450 }
1451
1452 snd_usb_unlock_shutdown(chip);
1453
1454 if (ret < 0) {
1455 error:
1456 usb_audio_err(chip,
1457 "cannot get connectors status: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n",
1458 UAC_GET_CUR, validx, idx, cval->val_type);
1459 return filter_error(cval, ret);
1460 }
1461
1462 ucontrol->value.integer.value[0] = val;
1463 return 0;
1464 }
1465
1466 static struct snd_kcontrol_new usb_feature_unit_ctl = {
1467 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1468 .name = "", /* will be filled later manually */
1469 .info = mixer_ctl_feature_info,
1470 .get = mixer_ctl_feature_get,
1471 .put = mixer_ctl_feature_put,
1472 };
1473
1474 /* the read-only variant */
1475 static const struct snd_kcontrol_new usb_feature_unit_ctl_ro = {
1476 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1477 .name = "", /* will be filled later manually */
1478 .info = mixer_ctl_feature_info,
1479 .get = mixer_ctl_feature_get,
1480 .put = NULL,
1481 };
1482
1483 /*
1484 * A control which shows the boolean value from reading a UAC control on
1485 * the master channel.
1486 */
1487 static struct snd_kcontrol_new usb_bool_master_control_ctl_ro = {
1488 .iface = SNDRV_CTL_ELEM_IFACE_CARD,
1489 .name = "", /* will be filled later manually */
1490 .access = SNDRV_CTL_ELEM_ACCESS_READ,
1491 .info = snd_ctl_boolean_mono_info,
1492 .get = mixer_ctl_master_bool_get,
1493 .put = NULL,
1494 };
1495
1496 static const struct snd_kcontrol_new usb_connector_ctl_ro = {
1497 .iface = SNDRV_CTL_ELEM_IFACE_CARD,
1498 .name = "", /* will be filled later manually */
1499 .access = SNDRV_CTL_ELEM_ACCESS_READ,
1500 .info = snd_ctl_boolean_mono_info,
1501 .get = mixer_ctl_connector_get,
1502 .put = NULL,
1503 };
1504
1505 /*
1506 * This symbol is exported in order to allow the mixer quirks to
1507 * hook up to the standard feature unit control mechanism
1508 */
1509 struct snd_kcontrol_new *snd_usb_feature_unit_ctl = &usb_feature_unit_ctl;
1510
1511 /*
1512 * build a feature control
1513 */
append_ctl_name(struct snd_kcontrol * kctl,const char * str)1514 static size_t append_ctl_name(struct snd_kcontrol *kctl, const char *str)
1515 {
1516 return strlcat(kctl->id.name, str, sizeof(kctl->id.name));
1517 }
1518
1519 /*
1520 * A lot of headsets/headphones have a "Speaker" mixer. Make sure we
1521 * rename it to "Headphone". We determine if something is a headphone
1522 * similar to how udev determines form factor.
1523 */
check_no_speaker_on_headset(struct snd_kcontrol * kctl,struct snd_card * card)1524 static void check_no_speaker_on_headset(struct snd_kcontrol *kctl,
1525 struct snd_card *card)
1526 {
1527 const char *names_to_check[] = {
1528 "Headset", "headset", "Headphone", "headphone", NULL};
1529 const char **s;
1530 bool found = false;
1531
1532 if (strcmp("Speaker", kctl->id.name))
1533 return;
1534
1535 for (s = names_to_check; *s; s++)
1536 if (strstr(card->shortname, *s)) {
1537 found = true;
1538 break;
1539 }
1540
1541 if (!found)
1542 return;
1543
1544 strlcpy(kctl->id.name, "Headphone", sizeof(kctl->id.name));
1545 }
1546
get_feature_control_info(int control)1547 static const struct usb_feature_control_info *get_feature_control_info(int control)
1548 {
1549 int i;
1550
1551 for (i = 0; i < ARRAY_SIZE(audio_feature_info); ++i) {
1552 if (audio_feature_info[i].control == control)
1553 return &audio_feature_info[i];
1554 }
1555 return NULL;
1556 }
1557
__build_feature_ctl(struct usb_mixer_interface * mixer,const struct usbmix_name_map * imap,unsigned int ctl_mask,int control,struct usb_audio_term * iterm,struct usb_audio_term * oterm,int unitid,int nameid,int readonly_mask)1558 static void __build_feature_ctl(struct usb_mixer_interface *mixer,
1559 const struct usbmix_name_map *imap,
1560 unsigned int ctl_mask, int control,
1561 struct usb_audio_term *iterm,
1562 struct usb_audio_term *oterm,
1563 int unitid, int nameid, int readonly_mask)
1564 {
1565 const struct usb_feature_control_info *ctl_info;
1566 unsigned int len = 0;
1567 int mapped_name = 0;
1568 struct snd_kcontrol *kctl;
1569 struct usb_mixer_elem_info *cval;
1570 const struct usbmix_name_map *map;
1571 unsigned int range;
1572
1573 if (control == UAC_FU_GRAPHIC_EQUALIZER) {
1574 /* FIXME: not supported yet */
1575 return;
1576 }
1577
1578 map = find_map(imap, unitid, control);
1579 if (check_ignored_ctl(map))
1580 return;
1581
1582 cval = kzalloc(sizeof(*cval), GFP_KERNEL);
1583 if (!cval)
1584 return;
1585 snd_usb_mixer_elem_init_std(&cval->head, mixer, unitid);
1586 cval->control = control;
1587 cval->cmask = ctl_mask;
1588
1589 ctl_info = get_feature_control_info(control);
1590 if (!ctl_info) {
1591 usb_mixer_elem_info_free(cval);
1592 return;
1593 }
1594 if (mixer->protocol == UAC_VERSION_1)
1595 cval->val_type = ctl_info->type;
1596 else /* UAC_VERSION_2 */
1597 cval->val_type = ctl_info->type_uac2 >= 0 ?
1598 ctl_info->type_uac2 : ctl_info->type;
1599
1600 if (ctl_mask == 0) {
1601 cval->channels = 1; /* master channel */
1602 cval->master_readonly = readonly_mask;
1603 } else {
1604 int i, c = 0;
1605 for (i = 0; i < 16; i++)
1606 if (ctl_mask & (1 << i))
1607 c++;
1608 cval->channels = c;
1609 cval->ch_readonly = readonly_mask;
1610 }
1611
1612 /*
1613 * If all channels in the mask are marked read-only, make the control
1614 * read-only. snd_usb_set_cur_mix_value() will check the mask again and won't
1615 * issue write commands to read-only channels.
1616 */
1617 if (cval->channels == readonly_mask)
1618 kctl = snd_ctl_new1(&usb_feature_unit_ctl_ro, cval);
1619 else
1620 kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval);
1621
1622 if (!kctl) {
1623 usb_audio_err(mixer->chip, "cannot malloc kcontrol\n");
1624 usb_mixer_elem_info_free(cval);
1625 return;
1626 }
1627 kctl->private_free = snd_usb_mixer_elem_free;
1628
1629 len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name));
1630 mapped_name = len != 0;
1631 if (!len && nameid)
1632 len = snd_usb_copy_string_desc(mixer->chip, nameid,
1633 kctl->id.name, sizeof(kctl->id.name));
1634
1635 switch (control) {
1636 case UAC_FU_MUTE:
1637 case UAC_FU_VOLUME:
1638 /*
1639 * determine the control name. the rule is:
1640 * - if a name id is given in descriptor, use it.
1641 * - if the connected input can be determined, then use the name
1642 * of terminal type.
1643 * - if the connected output can be determined, use it.
1644 * - otherwise, anonymous name.
1645 */
1646 if (!len) {
1647 if (iterm)
1648 len = get_term_name(mixer->chip, iterm,
1649 kctl->id.name,
1650 sizeof(kctl->id.name), 1);
1651 if (!len && oterm)
1652 len = get_term_name(mixer->chip, oterm,
1653 kctl->id.name,
1654 sizeof(kctl->id.name), 1);
1655 if (!len)
1656 snprintf(kctl->id.name, sizeof(kctl->id.name),
1657 "Feature %d", unitid);
1658 }
1659
1660 if (!mapped_name)
1661 check_no_speaker_on_headset(kctl, mixer->chip->card);
1662
1663 /*
1664 * determine the stream direction:
1665 * if the connected output is USB stream, then it's likely a
1666 * capture stream. otherwise it should be playback (hopefully :)
1667 */
1668 if (!mapped_name && oterm && !(oterm->type >> 16)) {
1669 if ((oterm->type & 0xff00) == 0x0100)
1670 append_ctl_name(kctl, " Capture");
1671 else
1672 append_ctl_name(kctl, " Playback");
1673 }
1674 append_ctl_name(kctl, control == UAC_FU_MUTE ?
1675 " Switch" : " Volume");
1676 break;
1677 default:
1678 if (!len)
1679 strlcpy(kctl->id.name, audio_feature_info[control-1].name,
1680 sizeof(kctl->id.name));
1681 break;
1682 }
1683
1684 /* get min/max values */
1685 get_min_max_with_quirks(cval, 0, kctl);
1686
1687 /* skip a bogus volume range */
1688 if (cval->max <= cval->min) {
1689 usb_audio_dbg(mixer->chip,
1690 "[%d] FU [%s] skipped due to invalid volume\n",
1691 cval->head.id, kctl->id.name);
1692 snd_ctl_free_one(kctl);
1693 return;
1694 }
1695
1696
1697 if (control == UAC_FU_VOLUME) {
1698 check_mapped_dB(map, cval);
1699 if (cval->dBmin < cval->dBmax || !cval->initialized) {
1700 kctl->tlv.c = snd_usb_mixer_vol_tlv;
1701 kctl->vd[0].access |=
1702 SNDRV_CTL_ELEM_ACCESS_TLV_READ |
1703 SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK;
1704 }
1705 }
1706
1707 snd_usb_mixer_fu_apply_quirk(mixer, cval, unitid, kctl);
1708
1709 range = (cval->max - cval->min) / cval->res;
1710 /*
1711 * Are there devices with volume range more than 255? I use a bit more
1712 * to be sure. 384 is a resolution magic number found on Logitech
1713 * devices. It will definitively catch all buggy Logitech devices.
1714 */
1715 if (range > 384) {
1716 usb_audio_warn(mixer->chip,
1717 "Warning! Unlikely big volume range (=%u), cval->res is probably wrong.",
1718 range);
1719 usb_audio_warn(mixer->chip,
1720 "[%d] FU [%s] ch = %d, val = %d/%d/%d",
1721 cval->head.id, kctl->id.name, cval->channels,
1722 cval->min, cval->max, cval->res);
1723 }
1724
1725 usb_audio_dbg(mixer->chip, "[%d] FU [%s] ch = %d, val = %d/%d/%d\n",
1726 cval->head.id, kctl->id.name, cval->channels,
1727 cval->min, cval->max, cval->res);
1728 snd_usb_mixer_add_control(&cval->head, kctl);
1729 }
1730
build_feature_ctl(struct mixer_build * state,void * raw_desc,unsigned int ctl_mask,int control,struct usb_audio_term * iterm,int unitid,int readonly_mask)1731 static void build_feature_ctl(struct mixer_build *state, void *raw_desc,
1732 unsigned int ctl_mask, int control,
1733 struct usb_audio_term *iterm, int unitid,
1734 int readonly_mask)
1735 {
1736 struct uac_feature_unit_descriptor *desc = raw_desc;
1737 int nameid = uac_feature_unit_iFeature(desc);
1738
1739 __build_feature_ctl(state->mixer, state->map, ctl_mask, control,
1740 iterm, &state->oterm, unitid, nameid, readonly_mask);
1741 }
1742
build_feature_ctl_badd(struct usb_mixer_interface * mixer,unsigned int ctl_mask,int control,int unitid,const struct usbmix_name_map * badd_map)1743 static void build_feature_ctl_badd(struct usb_mixer_interface *mixer,
1744 unsigned int ctl_mask, int control, int unitid,
1745 const struct usbmix_name_map *badd_map)
1746 {
1747 __build_feature_ctl(mixer, badd_map, ctl_mask, control,
1748 NULL, NULL, unitid, 0, 0);
1749 }
1750
get_connector_control_name(struct usb_mixer_interface * mixer,struct usb_audio_term * term,bool is_input,char * name,int name_size)1751 static void get_connector_control_name(struct usb_mixer_interface *mixer,
1752 struct usb_audio_term *term,
1753 bool is_input, char *name, int name_size)
1754 {
1755 int name_len = get_term_name(mixer->chip, term, name, name_size, 0);
1756
1757 if (name_len == 0)
1758 strlcpy(name, "Unknown", name_size);
1759
1760 /*
1761 * sound/core/ctljack.c has a convention of naming jack controls
1762 * by ending in " Jack". Make it slightly more useful by
1763 * indicating Input or Output after the terminal name.
1764 */
1765 if (is_input)
1766 strlcat(name, " - Input Jack", name_size);
1767 else
1768 strlcat(name, " - Output Jack", name_size);
1769 }
1770
1771 /* Build a mixer control for a UAC connector control (jack-detect) */
build_connector_control(struct usb_mixer_interface * mixer,const struct usbmix_name_map * imap,struct usb_audio_term * term,bool is_input)1772 static void build_connector_control(struct usb_mixer_interface *mixer,
1773 const struct usbmix_name_map *imap,
1774 struct usb_audio_term *term, bool is_input)
1775 {
1776 struct snd_kcontrol *kctl;
1777 struct usb_mixer_elem_info *cval;
1778 const struct usbmix_name_map *map;
1779
1780 map = find_map(imap, term->id, 0);
1781 if (check_ignored_ctl(map))
1782 return;
1783
1784 cval = kzalloc(sizeof(*cval), GFP_KERNEL);
1785 if (!cval)
1786 return;
1787 snd_usb_mixer_elem_init_std(&cval->head, mixer, term->id);
1788 /*
1789 * UAC2: The first byte from reading the UAC2_TE_CONNECTOR control returns the
1790 * number of channels connected.
1791 *
1792 * UAC3: The first byte specifies size of bitmap for the inserted controls. The
1793 * following byte(s) specifies which connectors are inserted.
1794 *
1795 * This boolean ctl will simply report if any channels are connected
1796 * or not.
1797 */
1798 if (mixer->protocol == UAC_VERSION_2)
1799 cval->control = UAC2_TE_CONNECTOR;
1800 else /* UAC_VERSION_3 */
1801 cval->control = UAC3_TE_INSERTION;
1802
1803 cval->val_type = USB_MIXER_BOOLEAN;
1804 cval->channels = 1; /* report true if any channel is connected */
1805 cval->min = 0;
1806 cval->max = 1;
1807 kctl = snd_ctl_new1(&usb_connector_ctl_ro, cval);
1808 if (!kctl) {
1809 usb_audio_err(mixer->chip, "cannot malloc kcontrol\n");
1810 usb_mixer_elem_info_free(cval);
1811 return;
1812 }
1813
1814 if (check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name)))
1815 strlcat(kctl->id.name, " Jack", sizeof(kctl->id.name));
1816 else
1817 get_connector_control_name(mixer, term, is_input, kctl->id.name,
1818 sizeof(kctl->id.name));
1819 kctl->private_free = snd_usb_mixer_elem_free;
1820 snd_usb_mixer_add_control(&cval->head, kctl);
1821 }
1822
parse_clock_source_unit(struct mixer_build * state,int unitid,void * _ftr)1823 static int parse_clock_source_unit(struct mixer_build *state, int unitid,
1824 void *_ftr)
1825 {
1826 struct uac_clock_source_descriptor *hdr = _ftr;
1827 struct usb_mixer_elem_info *cval;
1828 struct snd_kcontrol *kctl;
1829 char name[SNDRV_CTL_ELEM_ID_NAME_MAXLEN];
1830 int ret;
1831
1832 if (state->mixer->protocol != UAC_VERSION_2)
1833 return -EINVAL;
1834
1835 /*
1836 * The only property of this unit we are interested in is the
1837 * clock source validity. If that isn't readable, just bail out.
1838 */
1839 if (!uac_v2v3_control_is_readable(hdr->bmControls,
1840 UAC2_CS_CONTROL_CLOCK_VALID))
1841 return 0;
1842
1843 cval = kzalloc(sizeof(*cval), GFP_KERNEL);
1844 if (!cval)
1845 return -ENOMEM;
1846
1847 snd_usb_mixer_elem_init_std(&cval->head, state->mixer, hdr->bClockID);
1848
1849 cval->min = 0;
1850 cval->max = 1;
1851 cval->channels = 1;
1852 cval->val_type = USB_MIXER_BOOLEAN;
1853 cval->control = UAC2_CS_CONTROL_CLOCK_VALID;
1854
1855 cval->master_readonly = 1;
1856 /* From UAC2 5.2.5.1.2 "Only the get request is supported." */
1857 kctl = snd_ctl_new1(&usb_bool_master_control_ctl_ro, cval);
1858
1859 if (!kctl) {
1860 usb_mixer_elem_info_free(cval);
1861 return -ENOMEM;
1862 }
1863
1864 kctl->private_free = snd_usb_mixer_elem_free;
1865 ret = snd_usb_copy_string_desc(state->chip, hdr->iClockSource,
1866 name, sizeof(name));
1867 if (ret > 0)
1868 snprintf(kctl->id.name, sizeof(kctl->id.name),
1869 "%s Validity", name);
1870 else
1871 snprintf(kctl->id.name, sizeof(kctl->id.name),
1872 "Clock Source %d Validity", hdr->bClockID);
1873
1874 return snd_usb_mixer_add_control(&cval->head, kctl);
1875 }
1876
1877 /*
1878 * parse a feature unit
1879 *
1880 * most of controls are defined here.
1881 */
parse_audio_feature_unit(struct mixer_build * state,int unitid,void * _ftr)1882 static int parse_audio_feature_unit(struct mixer_build *state, int unitid,
1883 void *_ftr)
1884 {
1885 int channels, i, j;
1886 struct usb_audio_term iterm;
1887 unsigned int master_bits;
1888 int err, csize;
1889 struct uac_feature_unit_descriptor *hdr = _ftr;
1890 __u8 *bmaControls;
1891
1892 if (state->mixer->protocol == UAC_VERSION_1) {
1893 csize = hdr->bControlSize;
1894 channels = (hdr->bLength - 7) / csize - 1;
1895 bmaControls = hdr->bmaControls;
1896 } else if (state->mixer->protocol == UAC_VERSION_2) {
1897 struct uac2_feature_unit_descriptor *ftr = _ftr;
1898 csize = 4;
1899 channels = (hdr->bLength - 6) / 4 - 1;
1900 bmaControls = ftr->bmaControls;
1901 } else { /* UAC_VERSION_3 */
1902 struct uac3_feature_unit_descriptor *ftr = _ftr;
1903
1904 csize = 4;
1905 channels = (ftr->bLength - 7) / 4 - 1;
1906 bmaControls = ftr->bmaControls;
1907 }
1908
1909 /* parse the source unit */
1910 err = parse_audio_unit(state, hdr->bSourceID);
1911 if (err < 0)
1912 return err;
1913
1914 /* determine the input source type and name */
1915 err = check_input_term(state, hdr->bSourceID, &iterm);
1916 if (err < 0)
1917 return err;
1918
1919 master_bits = snd_usb_combine_bytes(bmaControls, csize);
1920 /* master configuration quirks */
1921 switch (state->chip->usb_id) {
1922 case USB_ID(0x08bb, 0x2702):
1923 usb_audio_info(state->chip,
1924 "usbmixer: master volume quirk for PCM2702 chip\n");
1925 /* disable non-functional volume control */
1926 master_bits &= ~UAC_CONTROL_BIT(UAC_FU_VOLUME);
1927 break;
1928 case USB_ID(0x1130, 0xf211):
1929 usb_audio_info(state->chip,
1930 "usbmixer: volume control quirk for Tenx TP6911 Audio Headset\n");
1931 /* disable non-functional volume control */
1932 channels = 0;
1933 break;
1934
1935 }
1936
1937 if (state->mixer->protocol == UAC_VERSION_1) {
1938 /* check all control types */
1939 for (i = 0; i < 10; i++) {
1940 unsigned int ch_bits = 0;
1941 int control = audio_feature_info[i].control;
1942
1943 for (j = 0; j < channels; j++) {
1944 unsigned int mask;
1945
1946 mask = snd_usb_combine_bytes(bmaControls +
1947 csize * (j+1), csize);
1948 if (mask & (1 << i))
1949 ch_bits |= (1 << j);
1950 }
1951 /* audio class v1 controls are never read-only */
1952
1953 /*
1954 * The first channel must be set
1955 * (for ease of programming).
1956 */
1957 if (ch_bits & 1)
1958 build_feature_ctl(state, _ftr, ch_bits, control,
1959 &iterm, unitid, 0);
1960 if (master_bits & (1 << i))
1961 build_feature_ctl(state, _ftr, 0, control,
1962 &iterm, unitid, 0);
1963 }
1964 } else { /* UAC_VERSION_2/3 */
1965 for (i = 0; i < ARRAY_SIZE(audio_feature_info); i++) {
1966 unsigned int ch_bits = 0;
1967 unsigned int ch_read_only = 0;
1968 int control = audio_feature_info[i].control;
1969
1970 for (j = 0; j < channels; j++) {
1971 unsigned int mask;
1972
1973 mask = snd_usb_combine_bytes(bmaControls +
1974 csize * (j+1), csize);
1975 if (uac_v2v3_control_is_readable(mask, control)) {
1976 ch_bits |= (1 << j);
1977 if (!uac_v2v3_control_is_writeable(mask, control))
1978 ch_read_only |= (1 << j);
1979 }
1980 }
1981
1982 /*
1983 * NOTE: build_feature_ctl() will mark the control
1984 * read-only if all channels are marked read-only in
1985 * the descriptors. Otherwise, the control will be
1986 * reported as writeable, but the driver will not
1987 * actually issue a write command for read-only
1988 * channels.
1989 */
1990
1991 /*
1992 * The first channel must be set
1993 * (for ease of programming).
1994 */
1995 if (ch_bits & 1)
1996 build_feature_ctl(state, _ftr, ch_bits, control,
1997 &iterm, unitid, ch_read_only);
1998 if (uac_v2v3_control_is_readable(master_bits, control))
1999 build_feature_ctl(state, _ftr, 0, control,
2000 &iterm, unitid,
2001 !uac_v2v3_control_is_writeable(master_bits,
2002 control));
2003 }
2004 }
2005
2006 return 0;
2007 }
2008
2009 /*
2010 * Mixer Unit
2011 */
2012
2013 /* check whether the given in/out overflows bmMixerControls matrix */
mixer_bitmap_overflow(struct uac_mixer_unit_descriptor * desc,int protocol,int num_ins,int num_outs)2014 static bool mixer_bitmap_overflow(struct uac_mixer_unit_descriptor *desc,
2015 int protocol, int num_ins, int num_outs)
2016 {
2017 u8 *hdr = (u8 *)desc;
2018 u8 *c = uac_mixer_unit_bmControls(desc, protocol);
2019 size_t rest; /* remaining bytes after bmMixerControls */
2020
2021 switch (protocol) {
2022 case UAC_VERSION_1:
2023 default:
2024 rest = 1; /* iMixer */
2025 break;
2026 case UAC_VERSION_2:
2027 rest = 2; /* bmControls + iMixer */
2028 break;
2029 case UAC_VERSION_3:
2030 rest = 6; /* bmControls + wMixerDescrStr */
2031 break;
2032 }
2033
2034 /* overflow? */
2035 return c + (num_ins * num_outs + 7) / 8 + rest > hdr + hdr[0];
2036 }
2037
2038 /*
2039 * build a mixer unit control
2040 *
2041 * the callbacks are identical with feature unit.
2042 * input channel number (zero based) is given in control field instead.
2043 */
build_mixer_unit_ctl(struct mixer_build * state,struct uac_mixer_unit_descriptor * desc,int in_pin,int in_ch,int num_outs,int unitid,struct usb_audio_term * iterm)2044 static void build_mixer_unit_ctl(struct mixer_build *state,
2045 struct uac_mixer_unit_descriptor *desc,
2046 int in_pin, int in_ch, int num_outs,
2047 int unitid, struct usb_audio_term *iterm)
2048 {
2049 struct usb_mixer_elem_info *cval;
2050 unsigned int i, len;
2051 struct snd_kcontrol *kctl;
2052 const struct usbmix_name_map *map;
2053
2054 map = find_map(state->map, unitid, 0);
2055 if (check_ignored_ctl(map))
2056 return;
2057
2058 cval = kzalloc(sizeof(*cval), GFP_KERNEL);
2059 if (!cval)
2060 return;
2061
2062 snd_usb_mixer_elem_init_std(&cval->head, state->mixer, unitid);
2063 cval->control = in_ch + 1; /* based on 1 */
2064 cval->val_type = USB_MIXER_S16;
2065 for (i = 0; i < num_outs; i++) {
2066 __u8 *c = uac_mixer_unit_bmControls(desc, state->mixer->protocol);
2067
2068 if (check_matrix_bitmap(c, in_ch, i, num_outs)) {
2069 cval->cmask |= (1 << i);
2070 cval->channels++;
2071 }
2072 }
2073
2074 /* get min/max values */
2075 get_min_max(cval, 0);
2076
2077 kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval);
2078 if (!kctl) {
2079 usb_audio_err(state->chip, "cannot malloc kcontrol\n");
2080 usb_mixer_elem_info_free(cval);
2081 return;
2082 }
2083 kctl->private_free = snd_usb_mixer_elem_free;
2084
2085 len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name));
2086 if (!len)
2087 len = get_term_name(state->chip, iterm, kctl->id.name,
2088 sizeof(kctl->id.name), 0);
2089 if (!len)
2090 len = sprintf(kctl->id.name, "Mixer Source %d", in_ch + 1);
2091 append_ctl_name(kctl, " Volume");
2092
2093 usb_audio_dbg(state->chip, "[%d] MU [%s] ch = %d, val = %d/%d\n",
2094 cval->head.id, kctl->id.name, cval->channels, cval->min, cval->max);
2095 snd_usb_mixer_add_control(&cval->head, kctl);
2096 }
2097
parse_audio_input_terminal(struct mixer_build * state,int unitid,void * raw_desc)2098 static int parse_audio_input_terminal(struct mixer_build *state, int unitid,
2099 void *raw_desc)
2100 {
2101 struct usb_audio_term iterm;
2102 unsigned int control, bmctls, term_id;
2103
2104 if (state->mixer->protocol == UAC_VERSION_2) {
2105 struct uac2_input_terminal_descriptor *d_v2 = raw_desc;
2106 control = UAC2_TE_CONNECTOR;
2107 term_id = d_v2->bTerminalID;
2108 bmctls = le16_to_cpu(d_v2->bmControls);
2109 } else if (state->mixer->protocol == UAC_VERSION_3) {
2110 struct uac3_input_terminal_descriptor *d_v3 = raw_desc;
2111 control = UAC3_TE_INSERTION;
2112 term_id = d_v3->bTerminalID;
2113 bmctls = le32_to_cpu(d_v3->bmControls);
2114 } else {
2115 return 0; /* UAC1. No Insertion control */
2116 }
2117
2118 check_input_term(state, term_id, &iterm);
2119
2120 /* Check for jack detection. */
2121 if ((iterm.type & 0xff00) != 0x0100 &&
2122 uac_v2v3_control_is_readable(bmctls, control))
2123 build_connector_control(state->mixer, state->map, &iterm, true);
2124
2125 return 0;
2126 }
2127
2128 /*
2129 * parse a mixer unit
2130 */
parse_audio_mixer_unit(struct mixer_build * state,int unitid,void * raw_desc)2131 static int parse_audio_mixer_unit(struct mixer_build *state, int unitid,
2132 void *raw_desc)
2133 {
2134 struct uac_mixer_unit_descriptor *desc = raw_desc;
2135 struct usb_audio_term iterm;
2136 int input_pins, num_ins, num_outs;
2137 int pin, ich, err;
2138
2139 err = uac_mixer_unit_get_channels(state, desc);
2140 if (err < 0) {
2141 usb_audio_err(state->chip,
2142 "invalid MIXER UNIT descriptor %d\n",
2143 unitid);
2144 return err;
2145 }
2146
2147 num_outs = err;
2148 input_pins = desc->bNrInPins;
2149
2150 num_ins = 0;
2151 ich = 0;
2152 for (pin = 0; pin < input_pins; pin++) {
2153 err = parse_audio_unit(state, desc->baSourceID[pin]);
2154 if (err < 0)
2155 continue;
2156 /* no bmControls field (e.g. Maya44) -> ignore */
2157 if (!num_outs)
2158 continue;
2159 err = check_input_term(state, desc->baSourceID[pin], &iterm);
2160 if (err < 0)
2161 return err;
2162 num_ins += iterm.channels;
2163 if (mixer_bitmap_overflow(desc, state->mixer->protocol,
2164 num_ins, num_outs))
2165 break;
2166 for (; ich < num_ins; ich++) {
2167 int och, ich_has_controls = 0;
2168
2169 for (och = 0; och < num_outs; och++) {
2170 __u8 *c = uac_mixer_unit_bmControls(desc,
2171 state->mixer->protocol);
2172
2173 if (check_matrix_bitmap(c, ich, och, num_outs)) {
2174 ich_has_controls = 1;
2175 break;
2176 }
2177 }
2178 if (ich_has_controls)
2179 build_mixer_unit_ctl(state, desc, pin, ich, num_outs,
2180 unitid, &iterm);
2181 }
2182 }
2183 return 0;
2184 }
2185
2186 /*
2187 * Processing Unit / Extension Unit
2188 */
2189
2190 /* get callback for processing/extension unit */
mixer_ctl_procunit_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)2191 static int mixer_ctl_procunit_get(struct snd_kcontrol *kcontrol,
2192 struct snd_ctl_elem_value *ucontrol)
2193 {
2194 struct usb_mixer_elem_info *cval = kcontrol->private_data;
2195 int err, val;
2196
2197 err = get_cur_ctl_value(cval, cval->control << 8, &val);
2198 if (err < 0) {
2199 ucontrol->value.integer.value[0] = cval->min;
2200 return filter_error(cval, err);
2201 }
2202 val = get_relative_value(cval, val);
2203 ucontrol->value.integer.value[0] = val;
2204 return 0;
2205 }
2206
2207 /* put callback for processing/extension unit */
mixer_ctl_procunit_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)2208 static int mixer_ctl_procunit_put(struct snd_kcontrol *kcontrol,
2209 struct snd_ctl_elem_value *ucontrol)
2210 {
2211 struct usb_mixer_elem_info *cval = kcontrol->private_data;
2212 int val, oval, err;
2213
2214 err = get_cur_ctl_value(cval, cval->control << 8, &oval);
2215 if (err < 0)
2216 return filter_error(cval, err);
2217 val = ucontrol->value.integer.value[0];
2218 val = get_abs_value(cval, val);
2219 if (val != oval) {
2220 set_cur_ctl_value(cval, cval->control << 8, val);
2221 return 1;
2222 }
2223 return 0;
2224 }
2225
2226 /* alsa control interface for processing/extension unit */
2227 static const struct snd_kcontrol_new mixer_procunit_ctl = {
2228 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
2229 .name = "", /* will be filled later */
2230 .info = mixer_ctl_feature_info,
2231 .get = mixer_ctl_procunit_get,
2232 .put = mixer_ctl_procunit_put,
2233 };
2234
2235 /*
2236 * predefined data for processing units
2237 */
2238 struct procunit_value_info {
2239 int control;
2240 const char *suffix;
2241 int val_type;
2242 int min_value;
2243 };
2244
2245 struct procunit_info {
2246 int type;
2247 char *name;
2248 const struct procunit_value_info *values;
2249 };
2250
2251 static const struct procunit_value_info undefined_proc_info[] = {
2252 { 0x00, "Control Undefined", 0 },
2253 { 0 }
2254 };
2255
2256 static const struct procunit_value_info updown_proc_info[] = {
2257 { UAC_UD_ENABLE, "Switch", USB_MIXER_BOOLEAN },
2258 { UAC_UD_MODE_SELECT, "Mode Select", USB_MIXER_U8, 1 },
2259 { 0 }
2260 };
2261 static const struct procunit_value_info prologic_proc_info[] = {
2262 { UAC_DP_ENABLE, "Switch", USB_MIXER_BOOLEAN },
2263 { UAC_DP_MODE_SELECT, "Mode Select", USB_MIXER_U8, 1 },
2264 { 0 }
2265 };
2266 static const struct procunit_value_info threed_enh_proc_info[] = {
2267 { UAC_3D_ENABLE, "Switch", USB_MIXER_BOOLEAN },
2268 { UAC_3D_SPACE, "Spaciousness", USB_MIXER_U8 },
2269 { 0 }
2270 };
2271 static const struct procunit_value_info reverb_proc_info[] = {
2272 { UAC_REVERB_ENABLE, "Switch", USB_MIXER_BOOLEAN },
2273 { UAC_REVERB_LEVEL, "Level", USB_MIXER_U8 },
2274 { UAC_REVERB_TIME, "Time", USB_MIXER_U16 },
2275 { UAC_REVERB_FEEDBACK, "Feedback", USB_MIXER_U8 },
2276 { 0 }
2277 };
2278 static const struct procunit_value_info chorus_proc_info[] = {
2279 { UAC_CHORUS_ENABLE, "Switch", USB_MIXER_BOOLEAN },
2280 { UAC_CHORUS_LEVEL, "Level", USB_MIXER_U8 },
2281 { UAC_CHORUS_RATE, "Rate", USB_MIXER_U16 },
2282 { UAC_CHORUS_DEPTH, "Depth", USB_MIXER_U16 },
2283 { 0 }
2284 };
2285 static const struct procunit_value_info dcr_proc_info[] = {
2286 { UAC_DCR_ENABLE, "Switch", USB_MIXER_BOOLEAN },
2287 { UAC_DCR_RATE, "Ratio", USB_MIXER_U16 },
2288 { UAC_DCR_MAXAMPL, "Max Amp", USB_MIXER_S16 },
2289 { UAC_DCR_THRESHOLD, "Threshold", USB_MIXER_S16 },
2290 { UAC_DCR_ATTACK_TIME, "Attack Time", USB_MIXER_U16 },
2291 { UAC_DCR_RELEASE_TIME, "Release Time", USB_MIXER_U16 },
2292 { 0 }
2293 };
2294
2295 static const struct procunit_info procunits[] = {
2296 { UAC_PROCESS_UP_DOWNMIX, "Up Down", updown_proc_info },
2297 { UAC_PROCESS_DOLBY_PROLOGIC, "Dolby Prologic", prologic_proc_info },
2298 { UAC_PROCESS_STEREO_EXTENDER, "3D Stereo Extender", threed_enh_proc_info },
2299 { UAC_PROCESS_REVERB, "Reverb", reverb_proc_info },
2300 { UAC_PROCESS_CHORUS, "Chorus", chorus_proc_info },
2301 { UAC_PROCESS_DYN_RANGE_COMP, "DCR", dcr_proc_info },
2302 { 0 },
2303 };
2304
2305 static const struct procunit_value_info uac3_updown_proc_info[] = {
2306 { UAC3_UD_MODE_SELECT, "Mode Select", USB_MIXER_U8, 1 },
2307 { 0 }
2308 };
2309 static const struct procunit_value_info uac3_stereo_ext_proc_info[] = {
2310 { UAC3_EXT_WIDTH_CONTROL, "Width Control", USB_MIXER_U8 },
2311 { 0 }
2312 };
2313
2314 static const struct procunit_info uac3_procunits[] = {
2315 { UAC3_PROCESS_UP_DOWNMIX, "Up Down", uac3_updown_proc_info },
2316 { UAC3_PROCESS_STEREO_EXTENDER, "3D Stereo Extender", uac3_stereo_ext_proc_info },
2317 { UAC3_PROCESS_MULTI_FUNCTION, "Multi-Function", undefined_proc_info },
2318 { 0 },
2319 };
2320
2321 /*
2322 * predefined data for extension units
2323 */
2324 static const struct procunit_value_info clock_rate_xu_info[] = {
2325 { USB_XU_CLOCK_RATE_SELECTOR, "Selector", USB_MIXER_U8, 0 },
2326 { 0 }
2327 };
2328 static const struct procunit_value_info clock_source_xu_info[] = {
2329 { USB_XU_CLOCK_SOURCE_SELECTOR, "External", USB_MIXER_BOOLEAN },
2330 { 0 }
2331 };
2332 static const struct procunit_value_info spdif_format_xu_info[] = {
2333 { USB_XU_DIGITAL_FORMAT_SELECTOR, "SPDIF/AC3", USB_MIXER_BOOLEAN },
2334 { 0 }
2335 };
2336 static const struct procunit_value_info soft_limit_xu_info[] = {
2337 { USB_XU_SOFT_LIMIT_SELECTOR, " ", USB_MIXER_BOOLEAN },
2338 { 0 }
2339 };
2340 static const struct procunit_info extunits[] = {
2341 { USB_XU_CLOCK_RATE, "Clock rate", clock_rate_xu_info },
2342 { USB_XU_CLOCK_SOURCE, "DigitalIn CLK source", clock_source_xu_info },
2343 { USB_XU_DIGITAL_IO_STATUS, "DigitalOut format:", spdif_format_xu_info },
2344 { USB_XU_DEVICE_OPTIONS, "AnalogueIn Soft Limit", soft_limit_xu_info },
2345 { 0 }
2346 };
2347
2348 /*
2349 * build a processing/extension unit
2350 */
build_audio_procunit(struct mixer_build * state,int unitid,void * raw_desc,const struct procunit_info * list,bool extension_unit)2351 static int build_audio_procunit(struct mixer_build *state, int unitid,
2352 void *raw_desc, const struct procunit_info *list,
2353 bool extension_unit)
2354 {
2355 struct uac_processing_unit_descriptor *desc = raw_desc;
2356 int num_ins;
2357 struct usb_mixer_elem_info *cval;
2358 struct snd_kcontrol *kctl;
2359 int i, err, nameid, type, len;
2360 const struct procunit_info *info;
2361 const struct procunit_value_info *valinfo;
2362 const struct usbmix_name_map *map;
2363 static const struct procunit_value_info default_value_info[] = {
2364 { 0x01, "Switch", USB_MIXER_BOOLEAN },
2365 { 0 }
2366 };
2367 static const struct procunit_info default_info = {
2368 0, NULL, default_value_info
2369 };
2370 const char *name = extension_unit ?
2371 "Extension Unit" : "Processing Unit";
2372
2373 num_ins = desc->bNrInPins;
2374 for (i = 0; i < num_ins; i++) {
2375 err = parse_audio_unit(state, desc->baSourceID[i]);
2376 if (err < 0)
2377 return err;
2378 }
2379
2380 type = le16_to_cpu(desc->wProcessType);
2381 for (info = list; info && info->type; info++)
2382 if (info->type == type)
2383 break;
2384 if (!info || !info->type)
2385 info = &default_info;
2386
2387 for (valinfo = info->values; valinfo->control; valinfo++) {
2388 __u8 *controls = uac_processing_unit_bmControls(desc, state->mixer->protocol);
2389
2390 if (state->mixer->protocol == UAC_VERSION_1) {
2391 if (!(controls[valinfo->control / 8] &
2392 (1 << ((valinfo->control % 8) - 1))))
2393 continue;
2394 } else { /* UAC_VERSION_2/3 */
2395 if (!uac_v2v3_control_is_readable(controls[valinfo->control / 8],
2396 valinfo->control))
2397 continue;
2398 }
2399
2400 map = find_map(state->map, unitid, valinfo->control);
2401 if (check_ignored_ctl(map))
2402 continue;
2403 cval = kzalloc(sizeof(*cval), GFP_KERNEL);
2404 if (!cval)
2405 return -ENOMEM;
2406 snd_usb_mixer_elem_init_std(&cval->head, state->mixer, unitid);
2407 cval->control = valinfo->control;
2408 cval->val_type = valinfo->val_type;
2409 cval->channels = 1;
2410
2411 if (state->mixer->protocol > UAC_VERSION_1 &&
2412 !uac_v2v3_control_is_writeable(controls[valinfo->control / 8],
2413 valinfo->control))
2414 cval->master_readonly = 1;
2415
2416 /* get min/max values */
2417 switch (type) {
2418 case UAC_PROCESS_UP_DOWNMIX: {
2419 bool mode_sel = false;
2420
2421 switch (state->mixer->protocol) {
2422 case UAC_VERSION_1:
2423 case UAC_VERSION_2:
2424 default:
2425 if (cval->control == UAC_UD_MODE_SELECT)
2426 mode_sel = true;
2427 break;
2428 case UAC_VERSION_3:
2429 if (cval->control == UAC3_UD_MODE_SELECT)
2430 mode_sel = true;
2431 break;
2432 }
2433
2434 if (mode_sel) {
2435 __u8 *control_spec = uac_processing_unit_specific(desc,
2436 state->mixer->protocol);
2437 cval->min = 1;
2438 cval->max = control_spec[0];
2439 cval->res = 1;
2440 cval->initialized = 1;
2441 break;
2442 }
2443
2444 get_min_max(cval, valinfo->min_value);
2445 break;
2446 }
2447 case USB_XU_CLOCK_RATE:
2448 /*
2449 * E-Mu USB 0404/0202/TrackerPre/0204
2450 * samplerate control quirk
2451 */
2452 cval->min = 0;
2453 cval->max = 5;
2454 cval->res = 1;
2455 cval->initialized = 1;
2456 break;
2457 default:
2458 get_min_max(cval, valinfo->min_value);
2459 break;
2460 }
2461
2462 kctl = snd_ctl_new1(&mixer_procunit_ctl, cval);
2463 if (!kctl) {
2464 usb_mixer_elem_info_free(cval);
2465 return -ENOMEM;
2466 }
2467 kctl->private_free = snd_usb_mixer_elem_free;
2468
2469 if (check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name))) {
2470 /* nothing */ ;
2471 } else if (info->name) {
2472 strlcpy(kctl->id.name, info->name, sizeof(kctl->id.name));
2473 } else {
2474 if (extension_unit)
2475 nameid = uac_extension_unit_iExtension(desc, state->mixer->protocol);
2476 else
2477 nameid = uac_processing_unit_iProcessing(desc, state->mixer->protocol);
2478 len = 0;
2479 if (nameid)
2480 len = snd_usb_copy_string_desc(state->chip,
2481 nameid,
2482 kctl->id.name,
2483 sizeof(kctl->id.name));
2484 if (!len)
2485 strlcpy(kctl->id.name, name, sizeof(kctl->id.name));
2486 }
2487 append_ctl_name(kctl, " ");
2488 append_ctl_name(kctl, valinfo->suffix);
2489
2490 usb_audio_dbg(state->chip,
2491 "[%d] PU [%s] ch = %d, val = %d/%d\n",
2492 cval->head.id, kctl->id.name, cval->channels,
2493 cval->min, cval->max);
2494
2495 err = snd_usb_mixer_add_control(&cval->head, kctl);
2496 if (err < 0)
2497 return err;
2498 }
2499 return 0;
2500 }
2501
parse_audio_processing_unit(struct mixer_build * state,int unitid,void * raw_desc)2502 static int parse_audio_processing_unit(struct mixer_build *state, int unitid,
2503 void *raw_desc)
2504 {
2505 switch (state->mixer->protocol) {
2506 case UAC_VERSION_1:
2507 case UAC_VERSION_2:
2508 default:
2509 return build_audio_procunit(state, unitid, raw_desc,
2510 procunits, false);
2511 case UAC_VERSION_3:
2512 return build_audio_procunit(state, unitid, raw_desc,
2513 uac3_procunits, false);
2514 }
2515 }
2516
parse_audio_extension_unit(struct mixer_build * state,int unitid,void * raw_desc)2517 static int parse_audio_extension_unit(struct mixer_build *state, int unitid,
2518 void *raw_desc)
2519 {
2520 /*
2521 * Note that we parse extension units with processing unit descriptors.
2522 * That's ok as the layout is the same.
2523 */
2524 return build_audio_procunit(state, unitid, raw_desc, extunits, true);
2525 }
2526
2527 /*
2528 * Selector Unit
2529 */
2530
2531 /*
2532 * info callback for selector unit
2533 * use an enumerator type for routing
2534 */
mixer_ctl_selector_info(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_info * uinfo)2535 static int mixer_ctl_selector_info(struct snd_kcontrol *kcontrol,
2536 struct snd_ctl_elem_info *uinfo)
2537 {
2538 struct usb_mixer_elem_info *cval = kcontrol->private_data;
2539 const char **itemlist = (const char **)kcontrol->private_value;
2540
2541 if (snd_BUG_ON(!itemlist))
2542 return -EINVAL;
2543 return snd_ctl_enum_info(uinfo, 1, cval->max, itemlist);
2544 }
2545
2546 /* get callback for selector unit */
mixer_ctl_selector_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)2547 static int mixer_ctl_selector_get(struct snd_kcontrol *kcontrol,
2548 struct snd_ctl_elem_value *ucontrol)
2549 {
2550 struct usb_mixer_elem_info *cval = kcontrol->private_data;
2551 int val, err;
2552
2553 err = get_cur_ctl_value(cval, cval->control << 8, &val);
2554 if (err < 0) {
2555 ucontrol->value.enumerated.item[0] = 0;
2556 return filter_error(cval, err);
2557 }
2558 val = get_relative_value(cval, val);
2559 ucontrol->value.enumerated.item[0] = val;
2560 return 0;
2561 }
2562
2563 /* put callback for selector unit */
mixer_ctl_selector_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)2564 static int mixer_ctl_selector_put(struct snd_kcontrol *kcontrol,
2565 struct snd_ctl_elem_value *ucontrol)
2566 {
2567 struct usb_mixer_elem_info *cval = kcontrol->private_data;
2568 int val, oval, err;
2569
2570 err = get_cur_ctl_value(cval, cval->control << 8, &oval);
2571 if (err < 0)
2572 return filter_error(cval, err);
2573 val = ucontrol->value.enumerated.item[0];
2574 val = get_abs_value(cval, val);
2575 if (val != oval) {
2576 set_cur_ctl_value(cval, cval->control << 8, val);
2577 return 1;
2578 }
2579 return 0;
2580 }
2581
2582 /* alsa control interface for selector unit */
2583 static const struct snd_kcontrol_new mixer_selectunit_ctl = {
2584 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
2585 .name = "", /* will be filled later */
2586 .info = mixer_ctl_selector_info,
2587 .get = mixer_ctl_selector_get,
2588 .put = mixer_ctl_selector_put,
2589 };
2590
2591 /*
2592 * private free callback.
2593 * free both private_data and private_value
2594 */
usb_mixer_selector_elem_free(struct snd_kcontrol * kctl)2595 static void usb_mixer_selector_elem_free(struct snd_kcontrol *kctl)
2596 {
2597 int i, num_ins = 0;
2598
2599 if (kctl->private_data) {
2600 struct usb_mixer_elem_info *cval = kctl->private_data;
2601 num_ins = cval->max;
2602 usb_mixer_elem_info_free(cval);
2603 kctl->private_data = NULL;
2604 }
2605 if (kctl->private_value) {
2606 char **itemlist = (char **)kctl->private_value;
2607 for (i = 0; i < num_ins; i++)
2608 kfree(itemlist[i]);
2609 kfree(itemlist);
2610 kctl->private_value = 0;
2611 }
2612 }
2613
2614 /*
2615 * parse a selector unit
2616 */
parse_audio_selector_unit(struct mixer_build * state,int unitid,void * raw_desc)2617 static int parse_audio_selector_unit(struct mixer_build *state, int unitid,
2618 void *raw_desc)
2619 {
2620 struct uac_selector_unit_descriptor *desc = raw_desc;
2621 unsigned int i, nameid, len;
2622 int err;
2623 struct usb_mixer_elem_info *cval;
2624 struct snd_kcontrol *kctl;
2625 const struct usbmix_name_map *map;
2626 char **namelist;
2627
2628 for (i = 0; i < desc->bNrInPins; i++) {
2629 err = parse_audio_unit(state, desc->baSourceID[i]);
2630 if (err < 0)
2631 return err;
2632 }
2633
2634 if (desc->bNrInPins == 1) /* only one ? nonsense! */
2635 return 0;
2636
2637 map = find_map(state->map, unitid, 0);
2638 if (check_ignored_ctl(map))
2639 return 0;
2640
2641 cval = kzalloc(sizeof(*cval), GFP_KERNEL);
2642 if (!cval)
2643 return -ENOMEM;
2644 snd_usb_mixer_elem_init_std(&cval->head, state->mixer, unitid);
2645 cval->val_type = USB_MIXER_U8;
2646 cval->channels = 1;
2647 cval->min = 1;
2648 cval->max = desc->bNrInPins;
2649 cval->res = 1;
2650 cval->initialized = 1;
2651
2652 switch (state->mixer->protocol) {
2653 case UAC_VERSION_1:
2654 default:
2655 cval->control = 0;
2656 break;
2657 case UAC_VERSION_2:
2658 case UAC_VERSION_3:
2659 if (desc->bDescriptorSubtype == UAC2_CLOCK_SELECTOR ||
2660 desc->bDescriptorSubtype == UAC3_CLOCK_SELECTOR)
2661 cval->control = UAC2_CX_CLOCK_SELECTOR;
2662 else /* UAC2/3_SELECTOR_UNIT */
2663 cval->control = UAC2_SU_SELECTOR;
2664 break;
2665 }
2666
2667 namelist = kcalloc(desc->bNrInPins, sizeof(char *), GFP_KERNEL);
2668 if (!namelist) {
2669 err = -ENOMEM;
2670 goto error_cval;
2671 }
2672 #define MAX_ITEM_NAME_LEN 64
2673 for (i = 0; i < desc->bNrInPins; i++) {
2674 struct usb_audio_term iterm;
2675 len = 0;
2676 namelist[i] = kmalloc(MAX_ITEM_NAME_LEN, GFP_KERNEL);
2677 if (!namelist[i]) {
2678 err = -ENOMEM;
2679 goto error_name;
2680 }
2681 len = check_mapped_selector_name(state, unitid, i, namelist[i],
2682 MAX_ITEM_NAME_LEN);
2683 if (! len && check_input_term(state, desc->baSourceID[i], &iterm) >= 0)
2684 len = get_term_name(state->chip, &iterm, namelist[i],
2685 MAX_ITEM_NAME_LEN, 0);
2686 if (! len)
2687 sprintf(namelist[i], "Input %u", i);
2688 }
2689
2690 kctl = snd_ctl_new1(&mixer_selectunit_ctl, cval);
2691 if (! kctl) {
2692 usb_audio_err(state->chip, "cannot malloc kcontrol\n");
2693 err = -ENOMEM;
2694 goto error_name;
2695 }
2696 kctl->private_value = (unsigned long)namelist;
2697 kctl->private_free = usb_mixer_selector_elem_free;
2698
2699 /* check the static mapping table at first */
2700 len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name));
2701 if (!len) {
2702 /* no mapping ? */
2703 switch (state->mixer->protocol) {
2704 case UAC_VERSION_1:
2705 case UAC_VERSION_2:
2706 default:
2707 /* if iSelector is given, use it */
2708 nameid = uac_selector_unit_iSelector(desc);
2709 if (nameid)
2710 len = snd_usb_copy_string_desc(state->chip,
2711 nameid, kctl->id.name,
2712 sizeof(kctl->id.name));
2713 break;
2714 case UAC_VERSION_3:
2715 /* TODO: Class-Specific strings not yet supported */
2716 break;
2717 }
2718
2719 /* ... or pick up the terminal name at next */
2720 if (!len)
2721 len = get_term_name(state->chip, &state->oterm,
2722 kctl->id.name, sizeof(kctl->id.name), 0);
2723 /* ... or use the fixed string "USB" as the last resort */
2724 if (!len)
2725 strlcpy(kctl->id.name, "USB", sizeof(kctl->id.name));
2726
2727 /* and add the proper suffix */
2728 if (desc->bDescriptorSubtype == UAC2_CLOCK_SELECTOR ||
2729 desc->bDescriptorSubtype == UAC3_CLOCK_SELECTOR)
2730 append_ctl_name(kctl, " Clock Source");
2731 else if ((state->oterm.type & 0xff00) == 0x0100)
2732 append_ctl_name(kctl, " Capture Source");
2733 else
2734 append_ctl_name(kctl, " Playback Source");
2735 }
2736
2737 usb_audio_dbg(state->chip, "[%d] SU [%s] items = %d\n",
2738 cval->head.id, kctl->id.name, desc->bNrInPins);
2739 return snd_usb_mixer_add_control(&cval->head, kctl);
2740
2741 error_name:
2742 for (i = 0; i < desc->bNrInPins; i++)
2743 kfree(namelist[i]);
2744 kfree(namelist);
2745 error_cval:
2746 usb_mixer_elem_info_free(cval);
2747 return err;
2748 }
2749
2750 /*
2751 * parse an audio unit recursively
2752 */
2753
parse_audio_unit(struct mixer_build * state,int unitid)2754 static int parse_audio_unit(struct mixer_build *state, int unitid)
2755 {
2756 unsigned char *p1;
2757 int protocol = state->mixer->protocol;
2758
2759 if (test_and_set_bit(unitid, state->unitbitmap))
2760 return 0; /* the unit already visited */
2761
2762 p1 = find_audio_control_unit(state, unitid);
2763 if (!p1) {
2764 usb_audio_err(state->chip, "unit %d not found!\n", unitid);
2765 return -EINVAL;
2766 }
2767
2768 if (!snd_usb_validate_audio_desc(p1, protocol)) {
2769 usb_audio_dbg(state->chip, "invalid unit %d\n", unitid);
2770 return 0; /* skip invalid unit */
2771 }
2772
2773 switch (PTYPE(protocol, p1[2])) {
2774 case PTYPE(UAC_VERSION_1, UAC_INPUT_TERMINAL):
2775 case PTYPE(UAC_VERSION_2, UAC_INPUT_TERMINAL):
2776 case PTYPE(UAC_VERSION_3, UAC_INPUT_TERMINAL):
2777 return parse_audio_input_terminal(state, unitid, p1);
2778 case PTYPE(UAC_VERSION_1, UAC_MIXER_UNIT):
2779 case PTYPE(UAC_VERSION_2, UAC_MIXER_UNIT):
2780 case PTYPE(UAC_VERSION_3, UAC3_MIXER_UNIT):
2781 return parse_audio_mixer_unit(state, unitid, p1);
2782 case PTYPE(UAC_VERSION_2, UAC2_CLOCK_SOURCE):
2783 case PTYPE(UAC_VERSION_3, UAC3_CLOCK_SOURCE):
2784 return parse_clock_source_unit(state, unitid, p1);
2785 case PTYPE(UAC_VERSION_1, UAC_SELECTOR_UNIT):
2786 case PTYPE(UAC_VERSION_2, UAC_SELECTOR_UNIT):
2787 case PTYPE(UAC_VERSION_3, UAC3_SELECTOR_UNIT):
2788 case PTYPE(UAC_VERSION_2, UAC2_CLOCK_SELECTOR):
2789 case PTYPE(UAC_VERSION_3, UAC3_CLOCK_SELECTOR):
2790 return parse_audio_selector_unit(state, unitid, p1);
2791 case PTYPE(UAC_VERSION_1, UAC_FEATURE_UNIT):
2792 case PTYPE(UAC_VERSION_2, UAC_FEATURE_UNIT):
2793 case PTYPE(UAC_VERSION_3, UAC3_FEATURE_UNIT):
2794 return parse_audio_feature_unit(state, unitid, p1);
2795 case PTYPE(UAC_VERSION_1, UAC1_PROCESSING_UNIT):
2796 case PTYPE(UAC_VERSION_2, UAC2_PROCESSING_UNIT_V2):
2797 case PTYPE(UAC_VERSION_3, UAC3_PROCESSING_UNIT):
2798 return parse_audio_processing_unit(state, unitid, p1);
2799 case PTYPE(UAC_VERSION_1, UAC1_EXTENSION_UNIT):
2800 case PTYPE(UAC_VERSION_2, UAC2_EXTENSION_UNIT_V2):
2801 case PTYPE(UAC_VERSION_3, UAC3_EXTENSION_UNIT):
2802 return parse_audio_extension_unit(state, unitid, p1);
2803 case PTYPE(UAC_VERSION_2, UAC2_EFFECT_UNIT):
2804 case PTYPE(UAC_VERSION_3, UAC3_EFFECT_UNIT):
2805 return 0; /* FIXME - effect units not implemented yet */
2806 default:
2807 usb_audio_err(state->chip,
2808 "unit %u: unexpected type 0x%02x\n",
2809 unitid, p1[2]);
2810 return -EINVAL;
2811 }
2812 }
2813
snd_usb_mixer_free(struct usb_mixer_interface * mixer)2814 static void snd_usb_mixer_free(struct usb_mixer_interface *mixer)
2815 {
2816 /* kill pending URBs */
2817 snd_usb_mixer_disconnect(mixer);
2818
2819 kfree(mixer->id_elems);
2820 if (mixer->urb) {
2821 kfree(mixer->urb->transfer_buffer);
2822 usb_free_urb(mixer->urb);
2823 }
2824 usb_free_urb(mixer->rc_urb);
2825 kfree(mixer->rc_setup_packet);
2826 kfree(mixer);
2827 }
2828
snd_usb_mixer_dev_free(struct snd_device * device)2829 static int snd_usb_mixer_dev_free(struct snd_device *device)
2830 {
2831 struct usb_mixer_interface *mixer = device->device_data;
2832 snd_usb_mixer_free(mixer);
2833 return 0;
2834 }
2835
2836 /* UAC3 predefined channels configuration */
2837 struct uac3_badd_profile {
2838 int subclass;
2839 const char *name;
2840 int c_chmask; /* capture channels mask */
2841 int p_chmask; /* playback channels mask */
2842 int st_chmask; /* side tone mixing channel mask */
2843 };
2844
2845 static const struct uac3_badd_profile uac3_badd_profiles[] = {
2846 {
2847 /*
2848 * BAIF, BAOF or combination of both
2849 * IN: Mono or Stereo cfg, Mono alt possible
2850 * OUT: Mono or Stereo cfg, Mono alt possible
2851 */
2852 .subclass = UAC3_FUNCTION_SUBCLASS_GENERIC_IO,
2853 .name = "GENERIC IO",
2854 .c_chmask = -1, /* dynamic channels */
2855 .p_chmask = -1, /* dynamic channels */
2856 },
2857 {
2858 /* BAOF; Stereo only cfg, Mono alt possible */
2859 .subclass = UAC3_FUNCTION_SUBCLASS_HEADPHONE,
2860 .name = "HEADPHONE",
2861 .p_chmask = 3,
2862 },
2863 {
2864 /* BAOF; Mono or Stereo cfg, Mono alt possible */
2865 .subclass = UAC3_FUNCTION_SUBCLASS_SPEAKER,
2866 .name = "SPEAKER",
2867 .p_chmask = -1, /* dynamic channels */
2868 },
2869 {
2870 /* BAIF; Mono or Stereo cfg, Mono alt possible */
2871 .subclass = UAC3_FUNCTION_SUBCLASS_MICROPHONE,
2872 .name = "MICROPHONE",
2873 .c_chmask = -1, /* dynamic channels */
2874 },
2875 {
2876 /*
2877 * BAIOF topology
2878 * IN: Mono only
2879 * OUT: Mono or Stereo cfg, Mono alt possible
2880 */
2881 .subclass = UAC3_FUNCTION_SUBCLASS_HEADSET,
2882 .name = "HEADSET",
2883 .c_chmask = 1,
2884 .p_chmask = -1, /* dynamic channels */
2885 .st_chmask = 1,
2886 },
2887 {
2888 /* BAIOF; IN: Mono only; OUT: Stereo only, Mono alt possible */
2889 .subclass = UAC3_FUNCTION_SUBCLASS_HEADSET_ADAPTER,
2890 .name = "HEADSET ADAPTER",
2891 .c_chmask = 1,
2892 .p_chmask = 3,
2893 .st_chmask = 1,
2894 },
2895 {
2896 /* BAIF + BAOF; IN: Mono only; OUT: Mono only */
2897 .subclass = UAC3_FUNCTION_SUBCLASS_SPEAKERPHONE,
2898 .name = "SPEAKERPHONE",
2899 .c_chmask = 1,
2900 .p_chmask = 1,
2901 },
2902 { 0 } /* terminator */
2903 };
2904
uac3_badd_func_has_valid_channels(struct usb_mixer_interface * mixer,const struct uac3_badd_profile * f,int c_chmask,int p_chmask)2905 static bool uac3_badd_func_has_valid_channels(struct usb_mixer_interface *mixer,
2906 const struct uac3_badd_profile *f,
2907 int c_chmask, int p_chmask)
2908 {
2909 /*
2910 * If both playback/capture channels are dynamic, make sure
2911 * at least one channel is present
2912 */
2913 if (f->c_chmask < 0 && f->p_chmask < 0) {
2914 if (!c_chmask && !p_chmask) {
2915 usb_audio_warn(mixer->chip, "BAAD %s: no channels?",
2916 f->name);
2917 return false;
2918 }
2919 return true;
2920 }
2921
2922 if ((f->c_chmask < 0 && !c_chmask) ||
2923 (f->c_chmask >= 0 && f->c_chmask != c_chmask)) {
2924 usb_audio_warn(mixer->chip, "BAAD %s c_chmask mismatch",
2925 f->name);
2926 return false;
2927 }
2928 if ((f->p_chmask < 0 && !p_chmask) ||
2929 (f->p_chmask >= 0 && f->p_chmask != p_chmask)) {
2930 usb_audio_warn(mixer->chip, "BAAD %s p_chmask mismatch",
2931 f->name);
2932 return false;
2933 }
2934 return true;
2935 }
2936
2937 /*
2938 * create mixer controls for UAC3 BADD profiles
2939 *
2940 * UAC3 BADD device doesn't contain CS descriptors thus we will guess everything
2941 *
2942 * BADD device may contain Mixer Unit, which doesn't have any controls, skip it
2943 */
snd_usb_mixer_controls_badd(struct usb_mixer_interface * mixer,int ctrlif)2944 static int snd_usb_mixer_controls_badd(struct usb_mixer_interface *mixer,
2945 int ctrlif)
2946 {
2947 struct usb_device *dev = mixer->chip->dev;
2948 struct usb_interface_assoc_descriptor *assoc;
2949 int badd_profile = mixer->chip->badd_profile;
2950 const struct uac3_badd_profile *f;
2951 const struct usbmix_ctl_map *map;
2952 int p_chmask = 0, c_chmask = 0, st_chmask = 0;
2953 int i;
2954
2955 assoc = usb_ifnum_to_if(dev, ctrlif)->intf_assoc;
2956
2957 /* Detect BADD capture/playback channels from AS EP descriptors */
2958 for (i = 0; i < assoc->bInterfaceCount; i++) {
2959 int intf = assoc->bFirstInterface + i;
2960
2961 struct usb_interface *iface;
2962 struct usb_host_interface *alts;
2963 struct usb_interface_descriptor *altsd;
2964 unsigned int maxpacksize;
2965 char dir_in;
2966 int chmask, num;
2967
2968 if (intf == ctrlif)
2969 continue;
2970
2971 iface = usb_ifnum_to_if(dev, intf);
2972 if (!iface)
2973 continue;
2974
2975 num = iface->num_altsetting;
2976
2977 if (num < 2)
2978 return -EINVAL;
2979
2980 /*
2981 * The number of Channels in an AudioStreaming interface
2982 * and the audio sample bit resolution (16 bits or 24
2983 * bits) can be derived from the wMaxPacketSize field in
2984 * the Standard AS Audio Data Endpoint descriptor in
2985 * Alternate Setting 1
2986 */
2987 alts = &iface->altsetting[1];
2988 altsd = get_iface_desc(alts);
2989
2990 if (altsd->bNumEndpoints < 1)
2991 return -EINVAL;
2992
2993 /* check direction */
2994 dir_in = (get_endpoint(alts, 0)->bEndpointAddress & USB_DIR_IN);
2995 maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
2996
2997 switch (maxpacksize) {
2998 default:
2999 usb_audio_err(mixer->chip,
3000 "incorrect wMaxPacketSize 0x%x for BADD profile\n",
3001 maxpacksize);
3002 return -EINVAL;
3003 case UAC3_BADD_EP_MAXPSIZE_SYNC_MONO_16:
3004 case UAC3_BADD_EP_MAXPSIZE_ASYNC_MONO_16:
3005 case UAC3_BADD_EP_MAXPSIZE_SYNC_MONO_24:
3006 case UAC3_BADD_EP_MAXPSIZE_ASYNC_MONO_24:
3007 chmask = 1;
3008 break;
3009 case UAC3_BADD_EP_MAXPSIZE_SYNC_STEREO_16:
3010 case UAC3_BADD_EP_MAXPSIZE_ASYNC_STEREO_16:
3011 case UAC3_BADD_EP_MAXPSIZE_SYNC_STEREO_24:
3012 case UAC3_BADD_EP_MAXPSIZE_ASYNC_STEREO_24:
3013 chmask = 3;
3014 break;
3015 }
3016
3017 if (dir_in)
3018 c_chmask = chmask;
3019 else
3020 p_chmask = chmask;
3021 }
3022
3023 usb_audio_dbg(mixer->chip,
3024 "UAC3 BADD profile 0x%x: detected c_chmask=%d p_chmask=%d\n",
3025 badd_profile, c_chmask, p_chmask);
3026
3027 /* check the mapping table */
3028 for (map = uac3_badd_usbmix_ctl_maps; map->id; map++) {
3029 if (map->id == badd_profile)
3030 break;
3031 }
3032
3033 if (!map->id)
3034 return -EINVAL;
3035
3036 for (f = uac3_badd_profiles; f->name; f++) {
3037 if (badd_profile == f->subclass)
3038 break;
3039 }
3040 if (!f->name)
3041 return -EINVAL;
3042 if (!uac3_badd_func_has_valid_channels(mixer, f, c_chmask, p_chmask))
3043 return -EINVAL;
3044 st_chmask = f->st_chmask;
3045
3046 /* Playback */
3047 if (p_chmask) {
3048 /* Master channel, always writable */
3049 build_feature_ctl_badd(mixer, 0, UAC_FU_MUTE,
3050 UAC3_BADD_FU_ID2, map->map);
3051 /* Mono/Stereo volume channels, always writable */
3052 build_feature_ctl_badd(mixer, p_chmask, UAC_FU_VOLUME,
3053 UAC3_BADD_FU_ID2, map->map);
3054 }
3055
3056 /* Capture */
3057 if (c_chmask) {
3058 /* Master channel, always writable */
3059 build_feature_ctl_badd(mixer, 0, UAC_FU_MUTE,
3060 UAC3_BADD_FU_ID5, map->map);
3061 /* Mono/Stereo volume channels, always writable */
3062 build_feature_ctl_badd(mixer, c_chmask, UAC_FU_VOLUME,
3063 UAC3_BADD_FU_ID5, map->map);
3064 }
3065
3066 /* Side tone-mixing */
3067 if (st_chmask) {
3068 /* Master channel, always writable */
3069 build_feature_ctl_badd(mixer, 0, UAC_FU_MUTE,
3070 UAC3_BADD_FU_ID7, map->map);
3071 /* Mono volume channel, always writable */
3072 build_feature_ctl_badd(mixer, 1, UAC_FU_VOLUME,
3073 UAC3_BADD_FU_ID7, map->map);
3074 }
3075
3076 /* Insertion Control */
3077 if (f->subclass == UAC3_FUNCTION_SUBCLASS_HEADSET_ADAPTER) {
3078 struct usb_audio_term iterm, oterm;
3079
3080 /* Input Term - Insertion control */
3081 memset(&iterm, 0, sizeof(iterm));
3082 iterm.id = UAC3_BADD_IT_ID4;
3083 iterm.type = UAC_BIDIR_TERMINAL_HEADSET;
3084 build_connector_control(mixer, map->map, &iterm, true);
3085
3086 /* Output Term - Insertion control */
3087 memset(&oterm, 0, sizeof(oterm));
3088 oterm.id = UAC3_BADD_OT_ID3;
3089 oterm.type = UAC_BIDIR_TERMINAL_HEADSET;
3090 build_connector_control(mixer, map->map, &oterm, false);
3091 }
3092
3093 return 0;
3094 }
3095
3096 /*
3097 * create mixer controls
3098 *
3099 * walk through all UAC_OUTPUT_TERMINAL descriptors to search for mixers
3100 */
snd_usb_mixer_controls(struct usb_mixer_interface * mixer)3101 static int snd_usb_mixer_controls(struct usb_mixer_interface *mixer)
3102 {
3103 struct mixer_build state;
3104 int err;
3105 const struct usbmix_ctl_map *map;
3106 void *p;
3107
3108 memset(&state, 0, sizeof(state));
3109 state.chip = mixer->chip;
3110 state.mixer = mixer;
3111 state.buffer = mixer->hostif->extra;
3112 state.buflen = mixer->hostif->extralen;
3113
3114 /* check the mapping table */
3115 for (map = usbmix_ctl_maps; map->id; map++) {
3116 if (map->id == state.chip->usb_id) {
3117 state.map = map->map;
3118 state.selector_map = map->selector_map;
3119 mixer->connector_map = map->connector_map;
3120 mixer->ignore_ctl_error |= map->ignore_ctl_error;
3121 break;
3122 }
3123 }
3124
3125 p = NULL;
3126 while ((p = snd_usb_find_csint_desc(mixer->hostif->extra,
3127 mixer->hostif->extralen,
3128 p, UAC_OUTPUT_TERMINAL)) != NULL) {
3129 if (!snd_usb_validate_audio_desc(p, mixer->protocol))
3130 continue; /* skip invalid descriptor */
3131
3132 if (mixer->protocol == UAC_VERSION_1) {
3133 struct uac1_output_terminal_descriptor *desc = p;
3134
3135 /* mark terminal ID as visited */
3136 set_bit(desc->bTerminalID, state.unitbitmap);
3137 state.oterm.id = desc->bTerminalID;
3138 state.oterm.type = le16_to_cpu(desc->wTerminalType);
3139 state.oterm.name = desc->iTerminal;
3140 err = parse_audio_unit(&state, desc->bSourceID);
3141 if (err < 0 && err != -EINVAL)
3142 return err;
3143 } else if (mixer->protocol == UAC_VERSION_2) {
3144 struct uac2_output_terminal_descriptor *desc = p;
3145
3146 /* mark terminal ID as visited */
3147 set_bit(desc->bTerminalID, state.unitbitmap);
3148 state.oterm.id = desc->bTerminalID;
3149 state.oterm.type = le16_to_cpu(desc->wTerminalType);
3150 state.oterm.name = desc->iTerminal;
3151 err = parse_audio_unit(&state, desc->bSourceID);
3152 if (err < 0 && err != -EINVAL)
3153 return err;
3154
3155 /*
3156 * For UAC2, use the same approach to also add the
3157 * clock selectors
3158 */
3159 err = parse_audio_unit(&state, desc->bCSourceID);
3160 if (err < 0 && err != -EINVAL)
3161 return err;
3162
3163 if ((state.oterm.type & 0xff00) != 0x0100 &&
3164 uac_v2v3_control_is_readable(le16_to_cpu(desc->bmControls),
3165 UAC2_TE_CONNECTOR)) {
3166 build_connector_control(state.mixer, state.map,
3167 &state.oterm, false);
3168 }
3169 } else { /* UAC_VERSION_3 */
3170 struct uac3_output_terminal_descriptor *desc = p;
3171
3172 /* mark terminal ID as visited */
3173 set_bit(desc->bTerminalID, state.unitbitmap);
3174 state.oterm.id = desc->bTerminalID;
3175 state.oterm.type = le16_to_cpu(desc->wTerminalType);
3176 state.oterm.name = le16_to_cpu(desc->wTerminalDescrStr);
3177 err = parse_audio_unit(&state, desc->bSourceID);
3178 if (err < 0 && err != -EINVAL)
3179 return err;
3180
3181 /*
3182 * For UAC3, use the same approach to also add the
3183 * clock selectors
3184 */
3185 err = parse_audio_unit(&state, desc->bCSourceID);
3186 if (err < 0 && err != -EINVAL)
3187 return err;
3188
3189 if ((state.oterm.type & 0xff00) != 0x0100 &&
3190 uac_v2v3_control_is_readable(le32_to_cpu(desc->bmControls),
3191 UAC3_TE_INSERTION)) {
3192 build_connector_control(state.mixer, state.map,
3193 &state.oterm, false);
3194 }
3195 }
3196 }
3197
3198 return 0;
3199 }
3200
delegate_notify(struct usb_mixer_interface * mixer,int unitid,u8 * control,u8 * channel)3201 static int delegate_notify(struct usb_mixer_interface *mixer, int unitid,
3202 u8 *control, u8 *channel)
3203 {
3204 const struct usbmix_connector_map *map = mixer->connector_map;
3205
3206 if (!map)
3207 return unitid;
3208
3209 for (; map->id; map++) {
3210 if (map->id == unitid) {
3211 if (control && map->control)
3212 *control = map->control;
3213 if (channel && map->channel)
3214 *channel = map->channel;
3215 return map->delegated_id;
3216 }
3217 }
3218 return unitid;
3219 }
3220
snd_usb_mixer_notify_id(struct usb_mixer_interface * mixer,int unitid)3221 void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer, int unitid)
3222 {
3223 struct usb_mixer_elem_list *list;
3224
3225 unitid = delegate_notify(mixer, unitid, NULL, NULL);
3226
3227 for_each_mixer_elem(list, mixer, unitid) {
3228 struct usb_mixer_elem_info *info;
3229
3230 if (!list->is_std_info)
3231 continue;
3232 info = mixer_elem_list_to_info(list);
3233 /* invalidate cache, so the value is read from the device */
3234 info->cached = 0;
3235 snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
3236 &list->kctl->id);
3237 }
3238 }
3239
snd_usb_mixer_dump_cval(struct snd_info_buffer * buffer,struct usb_mixer_elem_list * list)3240 static void snd_usb_mixer_dump_cval(struct snd_info_buffer *buffer,
3241 struct usb_mixer_elem_list *list)
3242 {
3243 struct usb_mixer_elem_info *cval = mixer_elem_list_to_info(list);
3244 static const char * const val_types[] = {
3245 [USB_MIXER_BOOLEAN] = "BOOLEAN",
3246 [USB_MIXER_INV_BOOLEAN] = "INV_BOOLEAN",
3247 [USB_MIXER_S8] = "S8",
3248 [USB_MIXER_U8] = "U8",
3249 [USB_MIXER_S16] = "S16",
3250 [USB_MIXER_U16] = "U16",
3251 [USB_MIXER_S32] = "S32",
3252 [USB_MIXER_U32] = "U32",
3253 [USB_MIXER_BESPOKEN] = "BESPOKEN",
3254 };
3255 snd_iprintf(buffer, " Info: id=%i, control=%i, cmask=0x%x, "
3256 "channels=%i, type=\"%s\"\n", cval->head.id,
3257 cval->control, cval->cmask, cval->channels,
3258 val_types[cval->val_type]);
3259 snd_iprintf(buffer, " Volume: min=%i, max=%i, dBmin=%i, dBmax=%i\n",
3260 cval->min, cval->max, cval->dBmin, cval->dBmax);
3261 }
3262
snd_usb_mixer_proc_read(struct snd_info_entry * entry,struct snd_info_buffer * buffer)3263 static void snd_usb_mixer_proc_read(struct snd_info_entry *entry,
3264 struct snd_info_buffer *buffer)
3265 {
3266 struct snd_usb_audio *chip = entry->private_data;
3267 struct usb_mixer_interface *mixer;
3268 struct usb_mixer_elem_list *list;
3269 int unitid;
3270
3271 list_for_each_entry(mixer, &chip->mixer_list, list) {
3272 snd_iprintf(buffer,
3273 "USB Mixer: usb_id=0x%08x, ctrlif=%i, ctlerr=%i\n",
3274 chip->usb_id, snd_usb_ctrl_intf(chip),
3275 mixer->ignore_ctl_error);
3276 snd_iprintf(buffer, "Card: %s\n", chip->card->longname);
3277 for (unitid = 0; unitid < MAX_ID_ELEMS; unitid++) {
3278 for_each_mixer_elem(list, mixer, unitid) {
3279 snd_iprintf(buffer, " Unit: %i\n", list->id);
3280 if (list->kctl)
3281 snd_iprintf(buffer,
3282 " Control: name=\"%s\", index=%i\n",
3283 list->kctl->id.name,
3284 list->kctl->id.index);
3285 if (list->dump)
3286 list->dump(buffer, list);
3287 }
3288 }
3289 }
3290 }
3291
snd_usb_mixer_interrupt_v2(struct usb_mixer_interface * mixer,int attribute,int value,int index)3292 static void snd_usb_mixer_interrupt_v2(struct usb_mixer_interface *mixer,
3293 int attribute, int value, int index)
3294 {
3295 struct usb_mixer_elem_list *list;
3296 __u8 unitid = (index >> 8) & 0xff;
3297 __u8 control = (value >> 8) & 0xff;
3298 __u8 channel = value & 0xff;
3299 unsigned int count = 0;
3300
3301 if (channel >= MAX_CHANNELS) {
3302 usb_audio_dbg(mixer->chip,
3303 "%s(): bogus channel number %d\n",
3304 __func__, channel);
3305 return;
3306 }
3307
3308 unitid = delegate_notify(mixer, unitid, &control, &channel);
3309
3310 for_each_mixer_elem(list, mixer, unitid)
3311 count++;
3312
3313 if (count == 0)
3314 return;
3315
3316 for_each_mixer_elem(list, mixer, unitid) {
3317 struct usb_mixer_elem_info *info;
3318
3319 if (!list->kctl)
3320 continue;
3321 if (!list->is_std_info)
3322 continue;
3323
3324 info = mixer_elem_list_to_info(list);
3325 if (count > 1 && info->control != control)
3326 continue;
3327
3328 switch (attribute) {
3329 case UAC2_CS_CUR:
3330 /* invalidate cache, so the value is read from the device */
3331 if (channel)
3332 info->cached &= ~(1 << channel);
3333 else /* master channel */
3334 info->cached = 0;
3335
3336 snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
3337 &info->head.kctl->id);
3338 break;
3339
3340 case UAC2_CS_RANGE:
3341 /* TODO */
3342 break;
3343
3344 case UAC2_CS_MEM:
3345 /* TODO */
3346 break;
3347
3348 default:
3349 usb_audio_dbg(mixer->chip,
3350 "unknown attribute %d in interrupt\n",
3351 attribute);
3352 break;
3353 } /* switch */
3354 }
3355 }
3356
snd_usb_mixer_interrupt(struct urb * urb)3357 static void snd_usb_mixer_interrupt(struct urb *urb)
3358 {
3359 struct usb_mixer_interface *mixer = urb->context;
3360 int len = urb->actual_length;
3361 int ustatus = urb->status;
3362
3363 if (ustatus != 0)
3364 goto requeue;
3365
3366 if (mixer->protocol == UAC_VERSION_1) {
3367 struct uac1_status_word *status;
3368
3369 for (status = urb->transfer_buffer;
3370 len >= sizeof(*status);
3371 len -= sizeof(*status), status++) {
3372 dev_dbg(&urb->dev->dev, "status interrupt: %02x %02x\n",
3373 status->bStatusType,
3374 status->bOriginator);
3375
3376 /* ignore any notifications not from the control interface */
3377 if ((status->bStatusType & UAC1_STATUS_TYPE_ORIG_MASK) !=
3378 UAC1_STATUS_TYPE_ORIG_AUDIO_CONTROL_IF)
3379 continue;
3380
3381 if (status->bStatusType & UAC1_STATUS_TYPE_MEM_CHANGED)
3382 snd_usb_mixer_rc_memory_change(mixer, status->bOriginator);
3383 else
3384 snd_usb_mixer_notify_id(mixer, status->bOriginator);
3385 }
3386 } else { /* UAC_VERSION_2 */
3387 struct uac2_interrupt_data_msg *msg;
3388
3389 for (msg = urb->transfer_buffer;
3390 len >= sizeof(*msg);
3391 len -= sizeof(*msg), msg++) {
3392 /* drop vendor specific and endpoint requests */
3393 if ((msg->bInfo & UAC2_INTERRUPT_DATA_MSG_VENDOR) ||
3394 (msg->bInfo & UAC2_INTERRUPT_DATA_MSG_EP))
3395 continue;
3396
3397 snd_usb_mixer_interrupt_v2(mixer, msg->bAttribute,
3398 le16_to_cpu(msg->wValue),
3399 le16_to_cpu(msg->wIndex));
3400 }
3401 }
3402
3403 requeue:
3404 if (ustatus != -ENOENT &&
3405 ustatus != -ECONNRESET &&
3406 ustatus != -ESHUTDOWN) {
3407 urb->dev = mixer->chip->dev;
3408 usb_submit_urb(urb, GFP_ATOMIC);
3409 }
3410 }
3411
3412 /* create the handler for the optional status interrupt endpoint */
snd_usb_mixer_status_create(struct usb_mixer_interface * mixer)3413 static int snd_usb_mixer_status_create(struct usb_mixer_interface *mixer)
3414 {
3415 struct usb_endpoint_descriptor *ep;
3416 void *transfer_buffer;
3417 int buffer_length;
3418 unsigned int epnum;
3419
3420 /* we need one interrupt input endpoint */
3421 if (get_iface_desc(mixer->hostif)->bNumEndpoints < 1)
3422 return 0;
3423 ep = get_endpoint(mixer->hostif, 0);
3424 if (!usb_endpoint_dir_in(ep) || !usb_endpoint_xfer_int(ep))
3425 return 0;
3426
3427 epnum = usb_endpoint_num(ep);
3428 buffer_length = le16_to_cpu(ep->wMaxPacketSize);
3429 transfer_buffer = kmalloc(buffer_length, GFP_KERNEL);
3430 if (!transfer_buffer)
3431 return -ENOMEM;
3432 mixer->urb = usb_alloc_urb(0, GFP_KERNEL);
3433 if (!mixer->urb) {
3434 kfree(transfer_buffer);
3435 return -ENOMEM;
3436 }
3437 usb_fill_int_urb(mixer->urb, mixer->chip->dev,
3438 usb_rcvintpipe(mixer->chip->dev, epnum),
3439 transfer_buffer, buffer_length,
3440 snd_usb_mixer_interrupt, mixer, ep->bInterval);
3441 usb_submit_urb(mixer->urb, GFP_KERNEL);
3442 return 0;
3443 }
3444
keep_iface_ctl_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)3445 static int keep_iface_ctl_get(struct snd_kcontrol *kcontrol,
3446 struct snd_ctl_elem_value *ucontrol)
3447 {
3448 struct usb_mixer_interface *mixer = snd_kcontrol_chip(kcontrol);
3449
3450 ucontrol->value.integer.value[0] = mixer->chip->keep_iface;
3451 return 0;
3452 }
3453
keep_iface_ctl_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)3454 static int keep_iface_ctl_put(struct snd_kcontrol *kcontrol,
3455 struct snd_ctl_elem_value *ucontrol)
3456 {
3457 struct usb_mixer_interface *mixer = snd_kcontrol_chip(kcontrol);
3458 bool keep_iface = !!ucontrol->value.integer.value[0];
3459
3460 if (mixer->chip->keep_iface == keep_iface)
3461 return 0;
3462 mixer->chip->keep_iface = keep_iface;
3463 return 1;
3464 }
3465
3466 static const struct snd_kcontrol_new keep_iface_ctl = {
3467 .iface = SNDRV_CTL_ELEM_IFACE_CARD,
3468 .name = "Keep Interface",
3469 .info = snd_ctl_boolean_mono_info,
3470 .get = keep_iface_ctl_get,
3471 .put = keep_iface_ctl_put,
3472 };
3473
create_keep_iface_ctl(struct usb_mixer_interface * mixer)3474 static int create_keep_iface_ctl(struct usb_mixer_interface *mixer)
3475 {
3476 struct snd_kcontrol *kctl = snd_ctl_new1(&keep_iface_ctl, mixer);
3477
3478 /* need only one control per card */
3479 if (snd_ctl_find_id(mixer->chip->card, &kctl->id)) {
3480 snd_ctl_free_one(kctl);
3481 return 0;
3482 }
3483
3484 return snd_ctl_add(mixer->chip->card, kctl);
3485 }
3486
snd_usb_create_mixer(struct snd_usb_audio * chip,int ctrlif,int ignore_error)3487 int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif,
3488 int ignore_error)
3489 {
3490 static struct snd_device_ops dev_ops = {
3491 .dev_free = snd_usb_mixer_dev_free
3492 };
3493 struct usb_mixer_interface *mixer;
3494 int err;
3495
3496 strcpy(chip->card->mixername, "USB Mixer");
3497
3498 mixer = kzalloc(sizeof(*mixer), GFP_KERNEL);
3499 if (!mixer)
3500 return -ENOMEM;
3501 mixer->chip = chip;
3502 mixer->ignore_ctl_error = ignore_error;
3503 mixer->id_elems = kcalloc(MAX_ID_ELEMS, sizeof(*mixer->id_elems),
3504 GFP_KERNEL);
3505 if (!mixer->id_elems) {
3506 kfree(mixer);
3507 return -ENOMEM;
3508 }
3509
3510 mixer->hostif = &usb_ifnum_to_if(chip->dev, ctrlif)->altsetting[0];
3511 switch (get_iface_desc(mixer->hostif)->bInterfaceProtocol) {
3512 case UAC_VERSION_1:
3513 default:
3514 mixer->protocol = UAC_VERSION_1;
3515 break;
3516 case UAC_VERSION_2:
3517 mixer->protocol = UAC_VERSION_2;
3518 break;
3519 case UAC_VERSION_3:
3520 mixer->protocol = UAC_VERSION_3;
3521 break;
3522 }
3523
3524 if (mixer->protocol == UAC_VERSION_3 &&
3525 chip->badd_profile >= UAC3_FUNCTION_SUBCLASS_GENERIC_IO) {
3526 err = snd_usb_mixer_controls_badd(mixer, ctrlif);
3527 if (err < 0)
3528 goto _error;
3529 } else {
3530 err = snd_usb_mixer_controls(mixer);
3531 if (err < 0)
3532 goto _error;
3533 }
3534
3535 err = snd_usb_mixer_status_create(mixer);
3536 if (err < 0)
3537 goto _error;
3538
3539 err = create_keep_iface_ctl(mixer);
3540 if (err < 0)
3541 goto _error;
3542
3543 err = snd_usb_mixer_apply_create_quirk(mixer);
3544 if (err < 0)
3545 goto _error;
3546
3547 err = snd_device_new(chip->card, SNDRV_DEV_CODEC, mixer, &dev_ops);
3548 if (err < 0)
3549 goto _error;
3550
3551 if (list_empty(&chip->mixer_list))
3552 snd_card_ro_proc_new(chip->card, "usbmixer", chip,
3553 snd_usb_mixer_proc_read);
3554
3555 list_add(&mixer->list, &chip->mixer_list);
3556 return 0;
3557
3558 _error:
3559 snd_usb_mixer_free(mixer);
3560 return err;
3561 }
3562
snd_usb_mixer_disconnect(struct usb_mixer_interface * mixer)3563 void snd_usb_mixer_disconnect(struct usb_mixer_interface *mixer)
3564 {
3565 if (mixer->disconnected)
3566 return;
3567 if (mixer->urb)
3568 usb_kill_urb(mixer->urb);
3569 if (mixer->rc_urb)
3570 usb_kill_urb(mixer->rc_urb);
3571 if (mixer->private_free)
3572 mixer->private_free(mixer);
3573 mixer->disconnected = true;
3574 }
3575
3576 #ifdef CONFIG_PM
3577 /* stop any bus activity of a mixer */
snd_usb_mixer_inactivate(struct usb_mixer_interface * mixer)3578 static void snd_usb_mixer_inactivate(struct usb_mixer_interface *mixer)
3579 {
3580 usb_kill_urb(mixer->urb);
3581 usb_kill_urb(mixer->rc_urb);
3582 }
3583
snd_usb_mixer_activate(struct usb_mixer_interface * mixer)3584 static int snd_usb_mixer_activate(struct usb_mixer_interface *mixer)
3585 {
3586 int err;
3587
3588 if (mixer->urb) {
3589 err = usb_submit_urb(mixer->urb, GFP_NOIO);
3590 if (err < 0)
3591 return err;
3592 }
3593
3594 return 0;
3595 }
3596
snd_usb_mixer_suspend(struct usb_mixer_interface * mixer)3597 int snd_usb_mixer_suspend(struct usb_mixer_interface *mixer)
3598 {
3599 snd_usb_mixer_inactivate(mixer);
3600 if (mixer->private_suspend)
3601 mixer->private_suspend(mixer);
3602 return 0;
3603 }
3604
restore_mixer_value(struct usb_mixer_elem_list * list)3605 static int restore_mixer_value(struct usb_mixer_elem_list *list)
3606 {
3607 struct usb_mixer_elem_info *cval = mixer_elem_list_to_info(list);
3608 int c, err, idx;
3609
3610 if (cval->val_type == USB_MIXER_BESPOKEN)
3611 return 0;
3612
3613 if (cval->cmask) {
3614 idx = 0;
3615 for (c = 0; c < MAX_CHANNELS; c++) {
3616 if (!(cval->cmask & (1 << c)))
3617 continue;
3618 if (cval->cached & (1 << (c + 1))) {
3619 err = snd_usb_set_cur_mix_value(cval, c + 1, idx,
3620 cval->cache_val[idx]);
3621 if (err < 0)
3622 return err;
3623 }
3624 idx++;
3625 }
3626 } else {
3627 /* master */
3628 if (cval->cached) {
3629 err = snd_usb_set_cur_mix_value(cval, 0, 0, *cval->cache_val);
3630 if (err < 0)
3631 return err;
3632 }
3633 }
3634
3635 return 0;
3636 }
3637
snd_usb_mixer_resume(struct usb_mixer_interface * mixer,bool reset_resume)3638 int snd_usb_mixer_resume(struct usb_mixer_interface *mixer, bool reset_resume)
3639 {
3640 struct usb_mixer_elem_list *list;
3641 int id, err;
3642
3643 if (reset_resume) {
3644 /* restore cached mixer values */
3645 for (id = 0; id < MAX_ID_ELEMS; id++) {
3646 for_each_mixer_elem(list, mixer, id) {
3647 if (list->resume) {
3648 err = list->resume(list);
3649 if (err < 0)
3650 return err;
3651 }
3652 }
3653 }
3654 }
3655
3656 snd_usb_mixer_resume_quirk(mixer);
3657
3658 return snd_usb_mixer_activate(mixer);
3659 }
3660 #endif
3661
snd_usb_mixer_elem_init_std(struct usb_mixer_elem_list * list,struct usb_mixer_interface * mixer,int unitid)3662 void snd_usb_mixer_elem_init_std(struct usb_mixer_elem_list *list,
3663 struct usb_mixer_interface *mixer,
3664 int unitid)
3665 {
3666 list->mixer = mixer;
3667 list->id = unitid;
3668 list->dump = snd_usb_mixer_dump_cval;
3669 #ifdef CONFIG_PM
3670 list->resume = restore_mixer_value;
3671 #endif
3672 }
3673