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nfsd4: typo logical vs bitwise negate for want_mask
[linux-btrfs-devel.git] / sound / usb / mixer.c
blobc22fa76e363ae5699e9885cc548fdc28d25607b3
1 /*
2 * (Tentative) USB Audio Driver for ALSA
3 *
4 * Mixer control part
5 *
6 * Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
7 *
8 * Many codes borrowed from audio.c by
9 * Alan Cox (alan@lxorguk.ukuu.org.uk)
10 * Thomas Sailer (sailer@ife.ee.ethz.ch)
11 *
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 *
27 */
28
29 /*
30 * TODOs, for both the mixer and the streaming interfaces:
31 *
32 * - support for UAC2 effect units
33 * - support for graphical equalizers
34 * - RANGE and MEM set commands (UAC2)
35 * - RANGE and MEM interrupt dispatchers (UAC2)
36 * - audio channel clustering (UAC2)
37 * - audio sample rate converter units (UAC2)
38 * - proper handling of clock multipliers (UAC2)
39 * - dispatch clock change notifications (UAC2)
40 * - stop PCM streams which use a clock that became invalid
41 * - stop PCM streams which use a clock selector that has changed
42 * - parse available sample rates again when clock sources changed
43 */
44
45 #include <linux/bitops.h>
46 #include <linux/init.h>
47 #include <linux/list.h>
48 #include <linux/slab.h>
49 #include <linux/string.h>
50 #include <linux/usb.h>
51 #include <linux/usb/audio.h>
52 #include <linux/usb/audio-v2.h>
53
54 #include <sound/core.h>
55 #include <sound/control.h>
56 #include <sound/hwdep.h>
57 #include <sound/info.h>
58 #include <sound/tlv.h>
59
60 #include "usbaudio.h"
61 #include "mixer.h"
62 #include "helper.h"
63 #include "mixer_quirks.h"
64 #include "power.h"
65
66 #define MAX_ID_ELEMS 256
67
68 struct usb_audio_term {
69 int id;
70 int type;
71 int channels;
72 unsigned int chconfig;
73 int name;
74 };
75
76 struct usbmix_name_map;
77
78 struct mixer_build {
79 struct snd_usb_audio *chip;
80 struct usb_mixer_interface *mixer;
81 unsigned char *buffer;
82 unsigned int buflen;
83 DECLARE_BITMAP(unitbitmap, MAX_ID_ELEMS);
84 struct usb_audio_term oterm;
85 const struct usbmix_name_map *map;
86 const struct usbmix_selector_map *selector_map;
87 };
88
89 /*E-mu 0202/0404/0204 eXtension Unit(XU) control*/
90 enum {
91 USB_XU_CLOCK_RATE = 0xe301,
92 USB_XU_CLOCK_SOURCE = 0xe302,
93 USB_XU_DIGITAL_IO_STATUS = 0xe303,
94 USB_XU_DEVICE_OPTIONS = 0xe304,
95 USB_XU_DIRECT_MONITORING = 0xe305,
96 USB_XU_METERING = 0xe306
97 };
98 enum {
99 USB_XU_CLOCK_SOURCE_SELECTOR = 0x02, /* clock source*/
100 USB_XU_CLOCK_RATE_SELECTOR = 0x03, /* clock rate */
101 USB_XU_DIGITAL_FORMAT_SELECTOR = 0x01, /* the spdif format */
102 USB_XU_SOFT_LIMIT_SELECTOR = 0x03 /* soft limiter */
103 };
104
105 /*
106 * manual mapping of mixer names
107 * if the mixer topology is too complicated and the parsed names are
108 * ambiguous, add the entries in usbmixer_maps.c.
109 */
110 #include "mixer_maps.c"
111
112 static const struct usbmix_name_map *
113 find_map(struct mixer_build *state, int unitid, int control)
114 {
115 const struct usbmix_name_map *p = state->map;
116
117 if (!p)
118 return NULL;
119
120 for (p = state->map; p->id; p++) {
121 if (p->id == unitid &&
122 (!control || !p->control || control == p->control))
123 return p;
124 }
125 return NULL;
126 }
127
128 /* get the mapped name if the unit matches */
129 static int
130 check_mapped_name(const struct usbmix_name_map *p, char *buf, int buflen)
131 {
132 if (!p || !p->name)
133 return 0;
134
135 buflen--;
136 return strlcpy(buf, p->name, buflen);
137 }
138
139 /* check whether the control should be ignored */
140 static inline int
141 check_ignored_ctl(const struct usbmix_name_map *p)
142 {
143 if (!p || p->name || p->dB)
144 return 0;
145 return 1;
146 }
147
148 /* dB mapping */
149 static inline void check_mapped_dB(const struct usbmix_name_map *p,
150 struct usb_mixer_elem_info *cval)
151 {
152 if (p && p->dB) {
153 cval->dBmin = p->dB->min;
154 cval->dBmax = p->dB->max;
155 }
156 }
157
158 /* get the mapped selector source name */
159 static int check_mapped_selector_name(struct mixer_build *state, int unitid,
160 int index, char *buf, int buflen)
161 {
162 const struct usbmix_selector_map *p;
163
164 if (! state->selector_map)
165 return 0;
166 for (p = state->selector_map; p->id; p++) {
167 if (p->id == unitid && index < p->count)
168 return strlcpy(buf, p->names[index], buflen);
169 }
170 return 0;
171 }
172
173 /*
174 * find an audio control unit with the given unit id
175 */
176 static void *find_audio_control_unit(struct mixer_build *state, unsigned char unit)
177 {
178 /* we just parse the header */
179 struct uac_feature_unit_descriptor *hdr = NULL;
180
181 while ((hdr = snd_usb_find_desc(state->buffer, state->buflen, hdr,
182 USB_DT_CS_INTERFACE)) != NULL) {
183 if (hdr->bLength >= 4 &&
184 hdr->bDescriptorSubtype >= UAC_INPUT_TERMINAL &&
185 hdr->bDescriptorSubtype <= UAC2_SAMPLE_RATE_CONVERTER &&
186 hdr->bUnitID == unit)
187 return hdr;
188 }
189
190 return NULL;
191 }
192
193 /*
194 * copy a string with the given id
195 */
196 static int snd_usb_copy_string_desc(struct mixer_build *state, int index, char *buf, int maxlen)
197 {
198 int len = usb_string(state->chip->dev, index, buf, maxlen - 1);
199 buf[len] = 0;
200 return len;
201 }
202
203 /*
204 * convert from the byte/word on usb descriptor to the zero-based integer
205 */
206 static int convert_signed_value(struct usb_mixer_elem_info *cval, int val)
207 {
208 switch (cval->val_type) {
209 case USB_MIXER_BOOLEAN:
210 return !!val;
211 case USB_MIXER_INV_BOOLEAN:
212 return !val;
213 case USB_MIXER_U8:
214 val &= 0xff;
215 break;
216 case USB_MIXER_S8:
217 val &= 0xff;
218 if (val >= 0x80)
219 val -= 0x100;
220 break;
221 case USB_MIXER_U16:
222 val &= 0xffff;
223 break;
224 case USB_MIXER_S16:
225 val &= 0xffff;
226 if (val >= 0x8000)
227 val -= 0x10000;
228 break;
229 }
230 return val;
231 }
232
233 /*
234 * convert from the zero-based int to the byte/word for usb descriptor
235 */
236 static int convert_bytes_value(struct usb_mixer_elem_info *cval, int val)
237 {
238 switch (cval->val_type) {
239 case USB_MIXER_BOOLEAN:
240 return !!val;
241 case USB_MIXER_INV_BOOLEAN:
242 return !val;
243 case USB_MIXER_S8:
244 case USB_MIXER_U8:
245 return val & 0xff;
246 case USB_MIXER_S16:
247 case USB_MIXER_U16:
248 return val & 0xffff;
249 }
250 return 0; /* not reached */
251 }
252
253 static int get_relative_value(struct usb_mixer_elem_info *cval, int val)
254 {
255 if (! cval->res)
256 cval->res = 1;
257 if (val < cval->min)
258 return 0;
259 else if (val >= cval->max)
260 return (cval->max - cval->min + cval->res - 1) / cval->res;
261 else
262 return (val - cval->min) / cval->res;
263 }
264
265 static int get_abs_value(struct usb_mixer_elem_info *cval, int val)
266 {
267 if (val < 0)
268 return cval->min;
269 if (! cval->res)
270 cval->res = 1;
271 val *= cval->res;
272 val += cval->min;
273 if (val > cval->max)
274 return cval->max;
275 return val;
276 }
277
278
279 /*
280 * retrieve a mixer value
281 */
282
283 static int get_ctl_value_v1(struct usb_mixer_elem_info *cval, int request, int validx, int *value_ret)
284 {
285 struct snd_usb_audio *chip = cval->mixer->chip;
286 unsigned char buf[2];
287 int val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1;
288 int timeout = 10;
289 int err;
290
291 err = snd_usb_autoresume(cval->mixer->chip);
292 if (err < 0)
293 return -EIO;
294 while (timeout-- > 0) {
295 if (snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), request,
296 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
297 validx, snd_usb_ctrl_intf(chip) | (cval->id << 8),
298 buf, val_len, 100) >= val_len) {
299 *value_ret = convert_signed_value(cval, snd_usb_combine_bytes(buf, val_len));
300 snd_usb_autosuspend(cval->mixer->chip);
301 return 0;
302 }
303 }
304 snd_usb_autosuspend(cval->mixer->chip);
305 snd_printdd(KERN_ERR "cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n",
306 request, validx, snd_usb_ctrl_intf(chip) | (cval->id << 8), cval->val_type);
307 return -EINVAL;
308 }
309
310 static int get_ctl_value_v2(struct usb_mixer_elem_info *cval, int request, int validx, int *value_ret)
311 {
312 struct snd_usb_audio *chip = cval->mixer->chip;
313 unsigned char buf[2 + 3*sizeof(__u16)]; /* enough space for one range */
314 unsigned char *val;
315 int ret, size;
316 __u8 bRequest;
317
318 if (request == UAC_GET_CUR) {
319 bRequest = UAC2_CS_CUR;
320 size = sizeof(__u16);
321 } else {
322 bRequest = UAC2_CS_RANGE;
323 size = sizeof(buf);
324 }
325
326 memset(buf, 0, sizeof(buf));
327
328 ret = snd_usb_autoresume(chip) ? -EIO : 0;
329 if (ret)
330 goto error;
331
332 ret = snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), bRequest,
333 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
334 validx, snd_usb_ctrl_intf(chip) | (cval->id << 8),
335 buf, size, 1000);
336 snd_usb_autosuspend(chip);
337
338 if (ret < 0) {
339 error:
340 snd_printk(KERN_ERR "cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n",
341 request, validx, snd_usb_ctrl_intf(chip) | (cval->id << 8), cval->val_type);
342 return ret;
343 }
344
345 /* FIXME: how should we handle multiple triplets here? */
346
347 switch (request) {
348 case UAC_GET_CUR:
349 val = buf;
350 break;
351 case UAC_GET_MIN:
352 val = buf + sizeof(__u16);
353 break;
354 case UAC_GET_MAX:
355 val = buf + sizeof(__u16) * 2;
356 break;
357 case UAC_GET_RES:
358 val = buf + sizeof(__u16) * 3;
359 break;
360 default:
361 return -EINVAL;
362 }
363
364 *value_ret = convert_signed_value(cval, snd_usb_combine_bytes(val, sizeof(__u16)));
365
366 return 0;
367 }
368
369 static int get_ctl_value(struct usb_mixer_elem_info *cval, int request, int validx, int *value_ret)
370 {
371 return (cval->mixer->protocol == UAC_VERSION_1) ?
372 get_ctl_value_v1(cval, request, validx, value_ret) :
373 get_ctl_value_v2(cval, request, validx, value_ret);
374 }
375
376 static int get_cur_ctl_value(struct usb_mixer_elem_info *cval, int validx, int *value)
377 {
378 return get_ctl_value(cval, UAC_GET_CUR, validx, value);
379 }
380
381 /* channel = 0: master, 1 = first channel */
382 static inline int get_cur_mix_raw(struct usb_mixer_elem_info *cval,
383 int channel, int *value)
384 {
385 return get_ctl_value(cval, UAC_GET_CUR, (cval->control << 8) | channel, value);
386 }
387
388 static int get_cur_mix_value(struct usb_mixer_elem_info *cval,
389 int channel, int index, int *value)
390 {
391 int err;
392
393 if (cval->cached & (1 << channel)) {
394 *value = cval->cache_val[index];
395 return 0;
396 }
397 err = get_cur_mix_raw(cval, channel, value);
398 if (err < 0) {
399 if (!cval->mixer->ignore_ctl_error)
400 snd_printd(KERN_ERR "cannot get current value for control %d ch %d: err = %d\n",
401 cval->control, channel, err);
402 return err;
403 }
404 cval->cached |= 1 << channel;
405 cval->cache_val[index] = *value;
406 return 0;
407 }
408
409
410 /*
411 * set a mixer value
412 */
413
414 int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval,
415 int request, int validx, int value_set)
416 {
417 struct snd_usb_audio *chip = cval->mixer->chip;
418 unsigned char buf[2];
419 int val_len, err, timeout = 10;
420
421 if (cval->mixer->protocol == UAC_VERSION_1) {
422 val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1;
423 } else { /* UAC_VERSION_2 */
424 /* audio class v2 controls are always 2 bytes in size */
425 val_len = sizeof(__u16);
426
427 /* FIXME */
428 if (request != UAC_SET_CUR) {
429 snd_printdd(KERN_WARNING "RANGE setting not yet supported\n");
430 return -EINVAL;
431 }
432
433 request = UAC2_CS_CUR;
434 }
435
436 value_set = convert_bytes_value(cval, value_set);
437 buf[0] = value_set & 0xff;
438 buf[1] = (value_set >> 8) & 0xff;
439 err = snd_usb_autoresume(chip);
440 if (err < 0)
441 return -EIO;
442 while (timeout-- > 0)
443 if (snd_usb_ctl_msg(chip->dev,
444 usb_sndctrlpipe(chip->dev, 0), request,
445 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
446 validx, snd_usb_ctrl_intf(chip) | (cval->id << 8),
447 buf, val_len, 100) >= 0) {
448 snd_usb_autosuspend(chip);
449 return 0;
450 }
451 snd_usb_autosuspend(chip);
452 snd_printdd(KERN_ERR "cannot set ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d, data = %#x/%#x\n",
453 request, validx, snd_usb_ctrl_intf(chip) | (cval->id << 8), cval->val_type, buf[0], buf[1]);
454 return -EINVAL;
455 }
456
457 static int set_cur_ctl_value(struct usb_mixer_elem_info *cval, int validx, int value)
458 {
459 return snd_usb_mixer_set_ctl_value(cval, UAC_SET_CUR, validx, value);
460 }
461
462 static int set_cur_mix_value(struct usb_mixer_elem_info *cval, int channel,
463 int index, int value)
464 {
465 int err;
466 unsigned int read_only = (channel == 0) ?
467 cval->master_readonly :
468 cval->ch_readonly & (1 << (channel - 1));
469
470 if (read_only) {
471 snd_printdd(KERN_INFO "%s(): channel %d of control %d is read_only\n",
472 __func__, channel, cval->control);
473 return 0;
474 }
475
476 err = snd_usb_mixer_set_ctl_value(cval, UAC_SET_CUR, (cval->control << 8) | channel,
477 value);
478 if (err < 0)
479 return err;
480 cval->cached |= 1 << channel;
481 cval->cache_val[index] = value;
482 return 0;
483 }
484
485 /*
486 * TLV callback for mixer volume controls
487 */
488 static int mixer_vol_tlv(struct snd_kcontrol *kcontrol, int op_flag,
489 unsigned int size, unsigned int __user *_tlv)
490 {
491 struct usb_mixer_elem_info *cval = kcontrol->private_data;
492 DECLARE_TLV_DB_MINMAX(scale, 0, 0);
493
494 if (size < sizeof(scale))
495 return -ENOMEM;
496 scale[2] = cval->dBmin;
497 scale[3] = cval->dBmax;
498 if (copy_to_user(_tlv, scale, sizeof(scale)))
499 return -EFAULT;
500 return 0;
501 }
502
503 /*
504 * parser routines begin here...
505 */
506
507 static int parse_audio_unit(struct mixer_build *state, int unitid);
508
509
510 /*
511 * check if the input/output channel routing is enabled on the given bitmap.
512 * used for mixer unit parser
513 */
514 static int check_matrix_bitmap(unsigned char *bmap, int ich, int och, int num_outs)
515 {
516 int idx = ich * num_outs + och;
517 return bmap[idx >> 3] & (0x80 >> (idx & 7));
518 }
519
520
521 /*
522 * add an alsa control element
523 * search and increment the index until an empty slot is found.
524 *
525 * if failed, give up and free the control instance.
526 */
527
528 int snd_usb_mixer_add_control(struct usb_mixer_interface *mixer,
529 struct snd_kcontrol *kctl)
530 {
531 struct usb_mixer_elem_info *cval = kctl->private_data;
532 int err;
533
534 while (snd_ctl_find_id(mixer->chip->card, &kctl->id))
535 kctl->id.index++;
536 if ((err = snd_ctl_add(mixer->chip->card, kctl)) < 0) {
537 snd_printd(KERN_ERR "cannot add control (err = %d)\n", err);
538 return err;
539 }
540 cval->elem_id = &kctl->id;
541 cval->next_id_elem = mixer->id_elems[cval->id];
542 mixer->id_elems[cval->id] = cval;
543 return 0;
544 }
545
546
547 /*
548 * get a terminal name string
549 */
550
551 static struct iterm_name_combo {
552 int type;
553 char *name;
554 } iterm_names[] = {
555 { 0x0300, "Output" },
556 { 0x0301, "Speaker" },
557 { 0x0302, "Headphone" },
558 { 0x0303, "HMD Audio" },
559 { 0x0304, "Desktop Speaker" },
560 { 0x0305, "Room Speaker" },
561 { 0x0306, "Com Speaker" },
562 { 0x0307, "LFE" },
563 { 0x0600, "External In" },
564 { 0x0601, "Analog In" },
565 { 0x0602, "Digital In" },
566 { 0x0603, "Line" },
567 { 0x0604, "Legacy In" },
568 { 0x0605, "IEC958 In" },
569 { 0x0606, "1394 DA Stream" },
570 { 0x0607, "1394 DV Stream" },
571 { 0x0700, "Embedded" },
572 { 0x0701, "Noise Source" },
573 { 0x0702, "Equalization Noise" },
574 { 0x0703, "CD" },
575 { 0x0704, "DAT" },
576 { 0x0705, "DCC" },
577 { 0x0706, "MiniDisk" },
578 { 0x0707, "Analog Tape" },
579 { 0x0708, "Phonograph" },
580 { 0x0709, "VCR Audio" },
581 { 0x070a, "Video Disk Audio" },
582 { 0x070b, "DVD Audio" },
583 { 0x070c, "TV Tuner Audio" },
584 { 0x070d, "Satellite Rec Audio" },
585 { 0x070e, "Cable Tuner Audio" },
586 { 0x070f, "DSS Audio" },
587 { 0x0710, "Radio Receiver" },
588 { 0x0711, "Radio Transmitter" },
589 { 0x0712, "Multi-Track Recorder" },
590 { 0x0713, "Synthesizer" },
591 { 0 },
592 };
593
594 static int get_term_name(struct mixer_build *state, struct usb_audio_term *iterm,
595 unsigned char *name, int maxlen, int term_only)
596 {
597 struct iterm_name_combo *names;
598
599 if (iterm->name)
600 return snd_usb_copy_string_desc(state, iterm->name, name, maxlen);
601
602 /* virtual type - not a real terminal */
603 if (iterm->type >> 16) {
604 if (term_only)
605 return 0;
606 switch (iterm->type >> 16) {
607 case UAC_SELECTOR_UNIT:
608 strcpy(name, "Selector"); return 8;
609 case UAC1_PROCESSING_UNIT:
610 strcpy(name, "Process Unit"); return 12;
611 case UAC1_EXTENSION_UNIT:
612 strcpy(name, "Ext Unit"); return 8;
613 case UAC_MIXER_UNIT:
614 strcpy(name, "Mixer"); return 5;
615 default:
616 return sprintf(name, "Unit %d", iterm->id);
617 }
618 }
619
620 switch (iterm->type & 0xff00) {
621 case 0x0100:
622 strcpy(name, "PCM"); return 3;
623 case 0x0200:
624 strcpy(name, "Mic"); return 3;
625 case 0x0400:
626 strcpy(name, "Headset"); return 7;
627 case 0x0500:
628 strcpy(name, "Phone"); return 5;
629 }
630
631 for (names = iterm_names; names->type; names++)
632 if (names->type == iterm->type) {
633 strcpy(name, names->name);
634 return strlen(names->name);
635 }
636 return 0;
637 }
638
639
640 /*
641 * parse the source unit recursively until it reaches to a terminal
642 * or a branched unit.
643 */
644 static int check_input_term(struct mixer_build *state, int id, struct usb_audio_term *term)
645 {
646 int err;
647 void *p1;
648
649 memset(term, 0, sizeof(*term));
650 while ((p1 = find_audio_control_unit(state, id)) != NULL) {
651 unsigned char *hdr = p1;
652 term->id = id;
653 switch (hdr[2]) {
654 case UAC_INPUT_TERMINAL:
655 if (state->mixer->protocol == UAC_VERSION_1) {
656 struct uac_input_terminal_descriptor *d = p1;
657 term->type = le16_to_cpu(d->wTerminalType);
658 term->channels = d->bNrChannels;
659 term->chconfig = le16_to_cpu(d->wChannelConfig);
660 term->name = d->iTerminal;
661 } else { /* UAC_VERSION_2 */
662 struct uac2_input_terminal_descriptor *d = p1;
663 term->type = le16_to_cpu(d->wTerminalType);
664 term->channels = d->bNrChannels;
665 term->chconfig = le32_to_cpu(d->bmChannelConfig);
666 term->name = d->iTerminal;
667
668 /* call recursively to get the clock selectors */
669 err = check_input_term(state, d->bCSourceID, term);
670 if (err < 0)
671 return err;
672 }
673 return 0;
674 case UAC_FEATURE_UNIT: {
675 /* the header is the same for v1 and v2 */
676 struct uac_feature_unit_descriptor *d = p1;
677 id = d->bSourceID;
678 break; /* continue to parse */
679 }
680 case UAC_MIXER_UNIT: {
681 struct uac_mixer_unit_descriptor *d = p1;
682 term->type = d->bDescriptorSubtype << 16; /* virtual type */
683 term->channels = uac_mixer_unit_bNrChannels(d);
684 term->chconfig = uac_mixer_unit_wChannelConfig(d, state->mixer->protocol);
685 term->name = uac_mixer_unit_iMixer(d);
686 return 0;
687 }
688 case UAC_SELECTOR_UNIT:
689 case UAC2_CLOCK_SELECTOR: {
690 struct uac_selector_unit_descriptor *d = p1;
691 /* call recursively to retrieve the channel info */
692 if (check_input_term(state, d->baSourceID[0], term) < 0)
693 return -ENODEV;
694 term->type = d->bDescriptorSubtype << 16; /* virtual type */
695 term->id = id;
696 term->name = uac_selector_unit_iSelector(d);
697 return 0;
698 }
699 case UAC1_PROCESSING_UNIT:
700 case UAC1_EXTENSION_UNIT: {
701 struct uac_processing_unit_descriptor *d = p1;
702 if (d->bNrInPins) {
703 id = d->baSourceID[0];
704 break; /* continue to parse */
705 }
706 term->type = d->bDescriptorSubtype << 16; /* virtual type */
707 term->channels = uac_processing_unit_bNrChannels(d);
708 term->chconfig = uac_processing_unit_wChannelConfig(d, state->mixer->protocol);
709 term->name = uac_processing_unit_iProcessing(d, state->mixer->protocol);
710 return 0;
711 }
712 case UAC2_CLOCK_SOURCE: {
713 struct uac_clock_source_descriptor *d = p1;
714 term->type = d->bDescriptorSubtype << 16; /* virtual type */
715 term->id = id;
716 term->name = d->iClockSource;
717 return 0;
718 }
719 default:
720 return -ENODEV;
721 }
722 }
723 return -ENODEV;
724 }
725
726
727 /*
728 * Feature Unit
729 */
730
731 /* feature unit control information */
732 struct usb_feature_control_info {
733 const char *name;
734 unsigned int type; /* control type (mute, volume, etc.) */
735 };
736
737 static struct usb_feature_control_info audio_feature_info[] = {
738 { "Mute", USB_MIXER_INV_BOOLEAN },
739 { "Volume", USB_MIXER_S16 },
740 { "Tone Control - Bass", USB_MIXER_S8 },
741 { "Tone Control - Mid", USB_MIXER_S8 },
742 { "Tone Control - Treble", USB_MIXER_S8 },
743 { "Graphic Equalizer", USB_MIXER_S8 }, /* FIXME: not implemeted yet */
744 { "Auto Gain Control", USB_MIXER_BOOLEAN },
745 { "Delay Control", USB_MIXER_U16 },
746 { "Bass Boost", USB_MIXER_BOOLEAN },
747 { "Loudness", USB_MIXER_BOOLEAN },
748 /* UAC2 specific */
749 { "Input Gain Control", USB_MIXER_U16 },
750 { "Input Gain Pad Control", USB_MIXER_BOOLEAN },
751 { "Phase Inverter Control", USB_MIXER_BOOLEAN },
752 };
753
754
755 /* private_free callback */
756 static void usb_mixer_elem_free(struct snd_kcontrol *kctl)
757 {
758 kfree(kctl->private_data);
759 kctl->private_data = NULL;
760 }
761
762
763 /*
764 * interface to ALSA control for feature/mixer units
765 */
766
767 /*
768 * retrieve the minimum and maximum values for the specified control
769 */
770 static int get_min_max(struct usb_mixer_elem_info *cval, int default_min)
771 {
772 /* for failsafe */
773 cval->min = default_min;
774 cval->max = cval->min + 1;
775 cval->res = 1;
776 cval->dBmin = cval->dBmax = 0;
777
778 if (cval->val_type == USB_MIXER_BOOLEAN ||
779 cval->val_type == USB_MIXER_INV_BOOLEAN) {
780 cval->initialized = 1;
781 } else {
782 int minchn = 0;
783 if (cval->cmask) {
784 int i;
785 for (i = 0; i < MAX_CHANNELS; i++)
786 if (cval->cmask & (1 << i)) {
787 minchn = i + 1;
788 break;
789 }
790 }
791 if (get_ctl_value(cval, UAC_GET_MAX, (cval->control << 8) | minchn, &cval->max) < 0 ||
792 get_ctl_value(cval, UAC_GET_MIN, (cval->control << 8) | minchn, &cval->min) < 0) {
793 snd_printd(KERN_ERR "%d:%d: cannot get min/max values for control %d (id %d)\n",
794 cval->id, snd_usb_ctrl_intf(cval->mixer->chip), cval->control, cval->id);
795 return -EINVAL;
796 }
797 if (get_ctl_value(cval, UAC_GET_RES, (cval->control << 8) | minchn, &cval->res) < 0) {
798 cval->res = 1;
799 } else {
800 int last_valid_res = cval->res;
801
802 while (cval->res > 1) {
803 if (snd_usb_mixer_set_ctl_value(cval, UAC_SET_RES,
804 (cval->control << 8) | minchn, cval->res / 2) < 0)
805 break;
806 cval->res /= 2;
807 }
808 if (get_ctl_value(cval, UAC_GET_RES, (cval->control << 8) | minchn, &cval->res) < 0)
809 cval->res = last_valid_res;
810 }
811 if (cval->res == 0)
812 cval->res = 1;
813
814 /* Additional checks for the proper resolution
815 *
816 * Some devices report smaller resolutions than actually
817 * reacting. They don't return errors but simply clip
818 * to the lower aligned value.
819 */
820 if (cval->min + cval->res < cval->max) {
821 int last_valid_res = cval->res;
822 int saved, test, check;
823 get_cur_mix_raw(cval, minchn, &saved);
824 for (;;) {
825 test = saved;
826 if (test < cval->max)
827 test += cval->res;
828 else
829 test -= cval->res;
830 if (test < cval->min || test > cval->max ||
831 set_cur_mix_value(cval, minchn, 0, test) ||
832 get_cur_mix_raw(cval, minchn, &check)) {
833 cval->res = last_valid_res;
834 break;
835 }
836 if (test == check)
837 break;
838 cval->res *= 2;
839 }
840 set_cur_mix_value(cval, minchn, 0, saved);
841 }
842
843 cval->initialized = 1;
844 }
845
846 /* USB descriptions contain the dB scale in 1/256 dB unit
847 * while ALSA TLV contains in 1/100 dB unit
848 */
849 cval->dBmin = (convert_signed_value(cval, cval->min) * 100) / 256;
850 cval->dBmax = (convert_signed_value(cval, cval->max) * 100) / 256;
851 if (cval->dBmin > cval->dBmax) {
852 /* something is wrong; assume it's either from/to 0dB */
853 if (cval->dBmin < 0)
854 cval->dBmax = 0;
855 else if (cval->dBmin > 0)
856 cval->dBmin = 0;
857 if (cval->dBmin > cval->dBmax) {
858 /* totally crap, return an error */
859 return -EINVAL;
860 }
861 }
862
863 return 0;
864 }
865
866
867 /* get a feature/mixer unit info */
868 static int mixer_ctl_feature_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
869 {
870 struct usb_mixer_elem_info *cval = kcontrol->private_data;
871
872 if (cval->val_type == USB_MIXER_BOOLEAN ||
873 cval->val_type == USB_MIXER_INV_BOOLEAN)
874 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
875 else
876 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
877 uinfo->count = cval->channels;
878 if (cval->val_type == USB_MIXER_BOOLEAN ||
879 cval->val_type == USB_MIXER_INV_BOOLEAN) {
880 uinfo->value.integer.min = 0;
881 uinfo->value.integer.max = 1;
882 } else {
883 if (! cval->initialized)
884 get_min_max(cval, 0);
885 uinfo->value.integer.min = 0;
886 uinfo->value.integer.max =
887 (cval->max - cval->min + cval->res - 1) / cval->res;
888 }
889 return 0;
890 }
891
892 /* get the current value from feature/mixer unit */
893 static int mixer_ctl_feature_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
894 {
895 struct usb_mixer_elem_info *cval = kcontrol->private_data;
896 int c, cnt, val, err;
897
898 ucontrol->value.integer.value[0] = cval->min;
899 if (cval->cmask) {
900 cnt = 0;
901 for (c = 0; c < MAX_CHANNELS; c++) {
902 if (!(cval->cmask & (1 << c)))
903 continue;
904 err = get_cur_mix_value(cval, c + 1, cnt, &val);
905 if (err < 0)
906 return cval->mixer->ignore_ctl_error ? 0 : err;
907 val = get_relative_value(cval, val);
908 ucontrol->value.integer.value[cnt] = val;
909 cnt++;
910 }
911 return 0;
912 } else {
913 /* master channel */
914 err = get_cur_mix_value(cval, 0, 0, &val);
915 if (err < 0)
916 return cval->mixer->ignore_ctl_error ? 0 : err;
917 val = get_relative_value(cval, val);
918 ucontrol->value.integer.value[0] = val;
919 }
920 return 0;
921 }
922
923 /* put the current value to feature/mixer unit */
924 static int mixer_ctl_feature_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
925 {
926 struct usb_mixer_elem_info *cval = kcontrol->private_data;
927 int c, cnt, val, oval, err;
928 int changed = 0;
929
930 if (cval->cmask) {
931 cnt = 0;
932 for (c = 0; c < MAX_CHANNELS; c++) {
933 if (!(cval->cmask & (1 << c)))
934 continue;
935 err = get_cur_mix_value(cval, c + 1, cnt, &oval);
936 if (err < 0)
937 return cval->mixer->ignore_ctl_error ? 0 : err;
938 val = ucontrol->value.integer.value[cnt];
939 val = get_abs_value(cval, val);
940 if (oval != val) {
941 set_cur_mix_value(cval, c + 1, cnt, val);
942 changed = 1;
943 }
944 cnt++;
945 }
946 } else {
947 /* master channel */
948 err = get_cur_mix_value(cval, 0, 0, &oval);
949 if (err < 0)
950 return cval->mixer->ignore_ctl_error ? 0 : err;
951 val = ucontrol->value.integer.value[0];
952 val = get_abs_value(cval, val);
953 if (val != oval) {
954 set_cur_mix_value(cval, 0, 0, val);
955 changed = 1;
956 }
957 }
958 return changed;
959 }
960
961 static struct snd_kcontrol_new usb_feature_unit_ctl = {
962 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
963 .name = "", /* will be filled later manually */
964 .info = mixer_ctl_feature_info,
965 .get = mixer_ctl_feature_get,
966 .put = mixer_ctl_feature_put,
967 };
968
969 /* the read-only variant */
970 static struct snd_kcontrol_new usb_feature_unit_ctl_ro = {
971 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
972 .name = "", /* will be filled later manually */
973 .info = mixer_ctl_feature_info,
974 .get = mixer_ctl_feature_get,
975 .put = NULL,
976 };
977
978 /* This symbol is exported in order to allow the mixer quirks to
979 * hook up to the standard feature unit control mechanism */
980 struct snd_kcontrol_new *snd_usb_feature_unit_ctl = &usb_feature_unit_ctl;
981
982 /*
983 * build a feature control
984 */
985
986 static size_t append_ctl_name(struct snd_kcontrol *kctl, const char *str)
987 {
988 return strlcat(kctl->id.name, str, sizeof(kctl->id.name));
989 }
990
991 static void build_feature_ctl(struct mixer_build *state, void *raw_desc,
992 unsigned int ctl_mask, int control,
993 struct usb_audio_term *iterm, int unitid,
994 int readonly_mask)
995 {
996 struct uac_feature_unit_descriptor *desc = raw_desc;
997 unsigned int len = 0;
998 int mapped_name = 0;
999 int nameid = uac_feature_unit_iFeature(desc);
1000 struct snd_kcontrol *kctl;
1001 struct usb_mixer_elem_info *cval;
1002 const struct usbmix_name_map *map;
1003 unsigned int range;
1004
1005 control++; /* change from zero-based to 1-based value */
1006
1007 if (control == UAC_FU_GRAPHIC_EQUALIZER) {
1008 /* FIXME: not supported yet */
1009 return;
1010 }
1011
1012 map = find_map(state, unitid, control);
1013 if (check_ignored_ctl(map))
1014 return;
1015
1016 cval = kzalloc(sizeof(*cval), GFP_KERNEL);
1017 if (! cval) {
1018 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
1019 return;
1020 }
1021 cval->mixer = state->mixer;
1022 cval->id = unitid;
1023 cval->control = control;
1024 cval->cmask = ctl_mask;
1025 cval->val_type = audio_feature_info[control-1].type;
1026 if (ctl_mask == 0) {
1027 cval->channels = 1; /* master channel */
1028 cval->master_readonly = readonly_mask;
1029 } else {
1030 int i, c = 0;
1031 for (i = 0; i < 16; i++)
1032 if (ctl_mask & (1 << i))
1033 c++;
1034 cval->channels = c;
1035 cval->ch_readonly = readonly_mask;
1036 }
1037
1038 /* get min/max values */
1039 get_min_max(cval, 0);
1040
1041 /* if all channels in the mask are marked read-only, make the control
1042 * read-only. set_cur_mix_value() will check the mask again and won't
1043 * issue write commands to read-only channels. */
1044 if (cval->channels == readonly_mask)
1045 kctl = snd_ctl_new1(&usb_feature_unit_ctl_ro, cval);
1046 else
1047 kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval);
1048
1049 if (! kctl) {
1050 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
1051 kfree(cval);
1052 return;
1053 }
1054 kctl->private_free = usb_mixer_elem_free;
1055
1056 len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name));
1057 mapped_name = len != 0;
1058 if (! len && nameid)
1059 len = snd_usb_copy_string_desc(state, nameid,
1060 kctl->id.name, sizeof(kctl->id.name));
1061
1062 switch (control) {
1063 case UAC_FU_MUTE:
1064 case UAC_FU_VOLUME:
1065 /* determine the control name. the rule is:
1066 * - if a name id is given in descriptor, use it.
1067 * - if the connected input can be determined, then use the name
1068 * of terminal type.
1069 * - if the connected output can be determined, use it.
1070 * - otherwise, anonymous name.
1071 */
1072 if (! len) {
1073 len = get_term_name(state, iterm, kctl->id.name, sizeof(kctl->id.name), 1);
1074 if (! len)
1075 len = get_term_name(state, &state->oterm, kctl->id.name, sizeof(kctl->id.name), 1);
1076 if (! len)
1077 len = snprintf(kctl->id.name, sizeof(kctl->id.name),
1078 "Feature %d", unitid);
1079 }
1080 /* determine the stream direction:
1081 * if the connected output is USB stream, then it's likely a
1082 * capture stream. otherwise it should be playback (hopefully :)
1083 */
1084 if (! mapped_name && ! (state->oterm.type >> 16)) {
1085 if ((state->oterm.type & 0xff00) == 0x0100) {
1086 len = append_ctl_name(kctl, " Capture");
1087 } else {
1088 len = append_ctl_name(kctl, " Playback");
1089 }
1090 }
1091 append_ctl_name(kctl, control == UAC_FU_MUTE ?
1092 " Switch" : " Volume");
1093 if (control == UAC_FU_VOLUME) {
1094 check_mapped_dB(map, cval);
1095 if (cval->dBmin < cval->dBmax) {
1096 kctl->tlv.c = mixer_vol_tlv;
1097 kctl->vd[0].access |=
1098 SNDRV_CTL_ELEM_ACCESS_TLV_READ |
1099 SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK;
1100 }
1101 }
1102 break;
1103
1104 default:
1105 if (! len)
1106 strlcpy(kctl->id.name, audio_feature_info[control-1].name,
1107 sizeof(kctl->id.name));
1108 break;
1109 }
1110
1111 /* volume control quirks */
1112 switch (state->chip->usb_id) {
1113 case USB_ID(0x0471, 0x0101):
1114 case USB_ID(0x0471, 0x0104):
1115 case USB_ID(0x0471, 0x0105):
1116 case USB_ID(0x0672, 0x1041):
1117 /* quirk for UDA1321/N101.
1118 * note that detection between firmware 2.1.1.7 (N101)
1119 * and later 2.1.1.21 is not very clear from datasheets.
1120 * I hope that the min value is -15360 for newer firmware --jk
1121 */
1122 if (!strcmp(kctl->id.name, "PCM Playback Volume") &&
1123 cval->min == -15616) {
1124 snd_printk(KERN_INFO
1125 "set volume quirk for UDA1321/N101 chip\n");
1126 cval->max = -256;
1127 }
1128 break;
1129
1130 case USB_ID(0x046d, 0x09a4):
1131 if (!strcmp(kctl->id.name, "Mic Capture Volume")) {
1132 snd_printk(KERN_INFO
1133 "set volume quirk for QuickCam E3500\n");
1134 cval->min = 6080;
1135 cval->max = 8768;
1136 cval->res = 192;
1137 }
1138 break;
1139
1140 case USB_ID(0x046d, 0x0808):
1141 case USB_ID(0x046d, 0x0809):
1142 case USB_ID(0x046d, 0x0991):
1143 /* Most audio usb devices lie about volume resolution.
1144 * Most Logitech webcams have res = 384.
1145 * Proboly there is some logitech magic behind this number --fishor
1146 */
1147 if (!strcmp(kctl->id.name, "Mic Capture Volume")) {
1148 snd_printk(KERN_INFO
1149 "set resolution quirk: cval->res = 384\n");
1150 cval->res = 384;
1151 }
1152 break;
1153
1154 }
1155
1156 range = (cval->max - cval->min) / cval->res;
1157 /* Are there devices with volume range more than 255? I use a bit more
1158 * to be sure. 384 is a resolution magic number found on Logitech
1159 * devices. It will definitively catch all buggy Logitech devices.
1160 */
1161 if (range > 384) {
1162 snd_printk(KERN_WARNING "usb_audio: Warning! Unlikely big "
1163 "volume range (=%u), cval->res is probably wrong.",
1164 range);
1165 snd_printk(KERN_WARNING "usb_audio: [%d] FU [%s] ch = %d, "
1166 "val = %d/%d/%d", cval->id,
1167 kctl->id.name, cval->channels,
1168 cval->min, cval->max, cval->res);
1169 }
1170
1171 snd_printdd(KERN_INFO "[%d] FU [%s] ch = %d, val = %d/%d/%d\n",
1172 cval->id, kctl->id.name, cval->channels, cval->min, cval->max, cval->res);
1173 snd_usb_mixer_add_control(state->mixer, kctl);
1174 }
1175
1176
1177
1178 /*
1179 * parse a feature unit
1180 *
1181 * most of controls are defined here.
1182 */
1183 static int parse_audio_feature_unit(struct mixer_build *state, int unitid, void *_ftr)
1184 {
1185 int channels, i, j;
1186 struct usb_audio_term iterm;
1187 unsigned int master_bits, first_ch_bits;
1188 int err, csize;
1189 struct uac_feature_unit_descriptor *hdr = _ftr;
1190 __u8 *bmaControls;
1191
1192 if (state->mixer->protocol == UAC_VERSION_1) {
1193 csize = hdr->bControlSize;
1194 channels = (hdr->bLength - 7) / csize - 1;
1195 bmaControls = hdr->bmaControls;
1196 } else {
1197 struct uac2_feature_unit_descriptor *ftr = _ftr;
1198 csize = 4;
1199 channels = (hdr->bLength - 6) / 4 - 1;
1200 bmaControls = ftr->bmaControls;
1201 }
1202
1203 if (hdr->bLength < 7 || !csize || hdr->bLength < 7 + csize) {
1204 snd_printk(KERN_ERR "usbaudio: unit %u: invalid UAC_FEATURE_UNIT descriptor\n", unitid);
1205 return -EINVAL;
1206 }
1207
1208 /* parse the source unit */
1209 if ((err = parse_audio_unit(state, hdr->bSourceID)) < 0)
1210 return err;
1211
1212 /* determine the input source type and name */
1213 if (check_input_term(state, hdr->bSourceID, &iterm) < 0)
1214 return -EINVAL;
1215
1216 master_bits = snd_usb_combine_bytes(bmaControls, csize);
1217 /* master configuration quirks */
1218 switch (state->chip->usb_id) {
1219 case USB_ID(0x08bb, 0x2702):
1220 snd_printk(KERN_INFO
1221 "usbmixer: master volume quirk for PCM2702 chip\n");
1222 /* disable non-functional volume control */
1223 master_bits &= ~UAC_CONTROL_BIT(UAC_FU_VOLUME);
1224 break;
1225 }
1226 if (channels > 0)
1227 first_ch_bits = snd_usb_combine_bytes(bmaControls + csize, csize);
1228 else
1229 first_ch_bits = 0;
1230
1231 if (state->mixer->protocol == UAC_VERSION_1) {
1232 /* check all control types */
1233 for (i = 0; i < 10; i++) {
1234 unsigned int ch_bits = 0;
1235 for (j = 0; j < channels; j++) {
1236 unsigned int mask = snd_usb_combine_bytes(bmaControls + csize * (j+1), csize);
1237 if (mask & (1 << i))
1238 ch_bits |= (1 << j);
1239 }
1240 /* audio class v1 controls are never read-only */
1241 if (ch_bits & 1) /* the first channel must be set (for ease of programming) */
1242 build_feature_ctl(state, _ftr, ch_bits, i, &iterm, unitid, 0);
1243 if (master_bits & (1 << i))
1244 build_feature_ctl(state, _ftr, 0, i, &iterm, unitid, 0);
1245 }
1246 } else { /* UAC_VERSION_2 */
1247 for (i = 0; i < 30/2; i++) {
1248 unsigned int ch_bits = 0;
1249 unsigned int ch_read_only = 0;
1250
1251 for (j = 0; j < channels; j++) {
1252 unsigned int mask = snd_usb_combine_bytes(bmaControls + csize * (j+1), csize);
1253 if (uac2_control_is_readable(mask, i)) {
1254 ch_bits |= (1 << j);
1255 if (!uac2_control_is_writeable(mask, i))
1256 ch_read_only |= (1 << j);
1257 }
1258 }
1259
1260 /* NOTE: build_feature_ctl() will mark the control read-only if all channels
1261 * are marked read-only in the descriptors. Otherwise, the control will be
1262 * reported as writeable, but the driver will not actually issue a write
1263 * command for read-only channels */
1264 if (ch_bits & 1) /* the first channel must be set (for ease of programming) */
1265 build_feature_ctl(state, _ftr, ch_bits, i, &iterm, unitid, ch_read_only);
1266 if (uac2_control_is_readable(master_bits, i))
1267 build_feature_ctl(state, _ftr, 0, i, &iterm, unitid,
1268 !uac2_control_is_writeable(master_bits, i));
1269 }
1270 }
1271
1272 return 0;
1273 }
1274
1275
1276 /*
1277 * Mixer Unit
1278 */
1279
1280 /*
1281 * build a mixer unit control
1282 *
1283 * the callbacks are identical with feature unit.
1284 * input channel number (zero based) is given in control field instead.
1285 */
1286
1287 static void build_mixer_unit_ctl(struct mixer_build *state,
1288 struct uac_mixer_unit_descriptor *desc,
1289 int in_pin, int in_ch, int unitid,
1290 struct usb_audio_term *iterm)
1291 {
1292 struct usb_mixer_elem_info *cval;
1293 unsigned int num_outs = uac_mixer_unit_bNrChannels(desc);
1294 unsigned int i, len;
1295 struct snd_kcontrol *kctl;
1296 const struct usbmix_name_map *map;
1297
1298 map = find_map(state, unitid, 0);
1299 if (check_ignored_ctl(map))
1300 return;
1301
1302 cval = kzalloc(sizeof(*cval), GFP_KERNEL);
1303 if (! cval)
1304 return;
1305
1306 cval->mixer = state->mixer;
1307 cval->id = unitid;
1308 cval->control = in_ch + 1; /* based on 1 */
1309 cval->val_type = USB_MIXER_S16;
1310 for (i = 0; i < num_outs; i++) {
1311 if (check_matrix_bitmap(uac_mixer_unit_bmControls(desc, state->mixer->protocol), in_ch, i, num_outs)) {
1312 cval->cmask |= (1 << i);
1313 cval->channels++;
1314 }
1315 }
1316
1317 /* get min/max values */
1318 get_min_max(cval, 0);
1319
1320 kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval);
1321 if (! kctl) {
1322 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
1323 kfree(cval);
1324 return;
1325 }
1326 kctl->private_free = usb_mixer_elem_free;
1327
1328 len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name));
1329 if (! len)
1330 len = get_term_name(state, iterm, kctl->id.name, sizeof(kctl->id.name), 0);
1331 if (! len)
1332 len = sprintf(kctl->id.name, "Mixer Source %d", in_ch + 1);
1333 append_ctl_name(kctl, " Volume");
1334
1335 snd_printdd(KERN_INFO "[%d] MU [%s] ch = %d, val = %d/%d\n",
1336 cval->id, kctl->id.name, cval->channels, cval->min, cval->max);
1337 snd_usb_mixer_add_control(state->mixer, kctl);
1338 }
1339
1340
1341 /*
1342 * parse a mixer unit
1343 */
1344 static int parse_audio_mixer_unit(struct mixer_build *state, int unitid, void *raw_desc)
1345 {
1346 struct uac_mixer_unit_descriptor *desc = raw_desc;
1347 struct usb_audio_term iterm;
1348 int input_pins, num_ins, num_outs;
1349 int pin, ich, err;
1350
1351 if (desc->bLength < 11 || ! (input_pins = desc->bNrInPins) || ! (num_outs = uac_mixer_unit_bNrChannels(desc))) {
1352 snd_printk(KERN_ERR "invalid MIXER UNIT descriptor %d\n", unitid);
1353 return -EINVAL;
1354 }
1355 /* no bmControls field (e.g. Maya44) -> ignore */
1356 if (desc->bLength <= 10 + input_pins) {
1357 snd_printdd(KERN_INFO "MU %d has no bmControls field\n", unitid);
1358 return 0;
1359 }
1360
1361 num_ins = 0;
1362 ich = 0;
1363 for (pin = 0; pin < input_pins; pin++) {
1364 err = parse_audio_unit(state, desc->baSourceID[pin]);
1365 if (err < 0)
1366 return err;
1367 err = check_input_term(state, desc->baSourceID[pin], &iterm);
1368 if (err < 0)
1369 return err;
1370 num_ins += iterm.channels;
1371 for (; ich < num_ins; ++ich) {
1372 int och, ich_has_controls = 0;
1373
1374 for (och = 0; och < num_outs; ++och) {
1375 if (check_matrix_bitmap(uac_mixer_unit_bmControls(desc, state->mixer->protocol),
1376 ich, och, num_outs)) {
1377 ich_has_controls = 1;
1378 break;
1379 }
1380 }
1381 if (ich_has_controls)
1382 build_mixer_unit_ctl(state, desc, pin, ich,
1383 unitid, &iterm);
1384 }
1385 }
1386 return 0;
1387 }
1388
1389
1390 /*
1391 * Processing Unit / Extension Unit
1392 */
1393
1394 /* get callback for processing/extension unit */
1395 static int mixer_ctl_procunit_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
1396 {
1397 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1398 int err, val;
1399
1400 err = get_cur_ctl_value(cval, cval->control << 8, &val);
1401 if (err < 0 && cval->mixer->ignore_ctl_error) {
1402 ucontrol->value.integer.value[0] = cval->min;
1403 return 0;
1404 }
1405 if (err < 0)
1406 return err;
1407 val = get_relative_value(cval, val);
1408 ucontrol->value.integer.value[0] = val;
1409 return 0;
1410 }
1411
1412 /* put callback for processing/extension unit */
1413 static int mixer_ctl_procunit_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
1414 {
1415 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1416 int val, oval, err;
1417
1418 err = get_cur_ctl_value(cval, cval->control << 8, &oval);
1419 if (err < 0) {
1420 if (cval->mixer->ignore_ctl_error)
1421 return 0;
1422 return err;
1423 }
1424 val = ucontrol->value.integer.value[0];
1425 val = get_abs_value(cval, val);
1426 if (val != oval) {
1427 set_cur_ctl_value(cval, cval->control << 8, val);
1428 return 1;
1429 }
1430 return 0;
1431 }
1432
1433 /* alsa control interface for processing/extension unit */
1434 static struct snd_kcontrol_new mixer_procunit_ctl = {
1435 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1436 .name = "", /* will be filled later */
1437 .info = mixer_ctl_feature_info,
1438 .get = mixer_ctl_procunit_get,
1439 .put = mixer_ctl_procunit_put,
1440 };
1441
1442
1443 /*
1444 * predefined data for processing units
1445 */
1446 struct procunit_value_info {
1447 int control;
1448 char *suffix;
1449 int val_type;
1450 int min_value;
1451 };
1452
1453 struct procunit_info {
1454 int type;
1455 char *name;
1456 struct procunit_value_info *values;
1457 };
1458
1459 static struct procunit_value_info updown_proc_info[] = {
1460 { UAC_UD_ENABLE, "Switch", USB_MIXER_BOOLEAN },
1461 { UAC_UD_MODE_SELECT, "Mode Select", USB_MIXER_U8, 1 },
1462 { 0 }
1463 };
1464 static struct procunit_value_info prologic_proc_info[] = {
1465 { UAC_DP_ENABLE, "Switch", USB_MIXER_BOOLEAN },
1466 { UAC_DP_MODE_SELECT, "Mode Select", USB_MIXER_U8, 1 },
1467 { 0 }
1468 };
1469 static struct procunit_value_info threed_enh_proc_info[] = {
1470 { UAC_3D_ENABLE, "Switch", USB_MIXER_BOOLEAN },
1471 { UAC_3D_SPACE, "Spaciousness", USB_MIXER_U8 },
1472 { 0 }
1473 };
1474 static struct procunit_value_info reverb_proc_info[] = {
1475 { UAC_REVERB_ENABLE, "Switch", USB_MIXER_BOOLEAN },
1476 { UAC_REVERB_LEVEL, "Level", USB_MIXER_U8 },
1477 { UAC_REVERB_TIME, "Time", USB_MIXER_U16 },
1478 { UAC_REVERB_FEEDBACK, "Feedback", USB_MIXER_U8 },
1479 { 0 }
1480 };
1481 static struct procunit_value_info chorus_proc_info[] = {
1482 { UAC_CHORUS_ENABLE, "Switch", USB_MIXER_BOOLEAN },
1483 { UAC_CHORUS_LEVEL, "Level", USB_MIXER_U8 },
1484 { UAC_CHORUS_RATE, "Rate", USB_MIXER_U16 },
1485 { UAC_CHORUS_DEPTH, "Depth", USB_MIXER_U16 },
1486 { 0 }
1487 };
1488 static struct procunit_value_info dcr_proc_info[] = {
1489 { UAC_DCR_ENABLE, "Switch", USB_MIXER_BOOLEAN },
1490 { UAC_DCR_RATE, "Ratio", USB_MIXER_U16 },
1491 { UAC_DCR_MAXAMPL, "Max Amp", USB_MIXER_S16 },
1492 { UAC_DCR_THRESHOLD, "Threshold", USB_MIXER_S16 },
1493 { UAC_DCR_ATTACK_TIME, "Attack Time", USB_MIXER_U16 },
1494 { UAC_DCR_RELEASE_TIME, "Release Time", USB_MIXER_U16 },
1495 { 0 }
1496 };
1497
1498 static struct procunit_info procunits[] = {
1499 { UAC_PROCESS_UP_DOWNMIX, "Up Down", updown_proc_info },
1500 { UAC_PROCESS_DOLBY_PROLOGIC, "Dolby Prologic", prologic_proc_info },
1501 { UAC_PROCESS_STEREO_EXTENDER, "3D Stereo Extender", threed_enh_proc_info },
1502 { UAC_PROCESS_REVERB, "Reverb", reverb_proc_info },
1503 { UAC_PROCESS_CHORUS, "Chorus", chorus_proc_info },
1504 { UAC_PROCESS_DYN_RANGE_COMP, "DCR", dcr_proc_info },
1505 { 0 },
1506 };
1507 /*
1508 * predefined data for extension units
1509 */
1510 static struct procunit_value_info clock_rate_xu_info[] = {
1511 { USB_XU_CLOCK_RATE_SELECTOR, "Selector", USB_MIXER_U8, 0 },
1512 { 0 }
1513 };
1514 static struct procunit_value_info clock_source_xu_info[] = {
1515 { USB_XU_CLOCK_SOURCE_SELECTOR, "External", USB_MIXER_BOOLEAN },
1516 { 0 }
1517 };
1518 static struct procunit_value_info spdif_format_xu_info[] = {
1519 { USB_XU_DIGITAL_FORMAT_SELECTOR, "SPDIF/AC3", USB_MIXER_BOOLEAN },
1520 { 0 }
1521 };
1522 static struct procunit_value_info soft_limit_xu_info[] = {
1523 { USB_XU_SOFT_LIMIT_SELECTOR, " ", USB_MIXER_BOOLEAN },
1524 { 0 }
1525 };
1526 static struct procunit_info extunits[] = {
1527 { USB_XU_CLOCK_RATE, "Clock rate", clock_rate_xu_info },
1528 { USB_XU_CLOCK_SOURCE, "DigitalIn CLK source", clock_source_xu_info },
1529 { USB_XU_DIGITAL_IO_STATUS, "DigitalOut format:", spdif_format_xu_info },
1530 { USB_XU_DEVICE_OPTIONS, "AnalogueIn Soft Limit", soft_limit_xu_info },
1531 { 0 }
1532 };
1533 /*
1534 * build a processing/extension unit
1535 */
1536 static int build_audio_procunit(struct mixer_build *state, int unitid, void *raw_desc, struct procunit_info *list, char *name)
1537 {
1538 struct uac_processing_unit_descriptor *desc = raw_desc;
1539 int num_ins = desc->bNrInPins;
1540 struct usb_mixer_elem_info *cval;
1541 struct snd_kcontrol *kctl;
1542 int i, err, nameid, type, len;
1543 struct procunit_info *info;
1544 struct procunit_value_info *valinfo;
1545 const struct usbmix_name_map *map;
1546 static struct procunit_value_info default_value_info[] = {
1547 { 0x01, "Switch", USB_MIXER_BOOLEAN },
1548 { 0 }
1549 };
1550 static struct procunit_info default_info = {
1551 0, NULL, default_value_info
1552 };
1553
1554 if (desc->bLength < 13 || desc->bLength < 13 + num_ins ||
1555 desc->bLength < num_ins + uac_processing_unit_bControlSize(desc, state->mixer->protocol)) {
1556 snd_printk(KERN_ERR "invalid %s descriptor (id %d)\n", name, unitid);
1557 return -EINVAL;
1558 }
1559
1560 for (i = 0; i < num_ins; i++) {
1561 if ((err = parse_audio_unit(state, desc->baSourceID[i])) < 0)
1562 return err;
1563 }
1564
1565 type = le16_to_cpu(desc->wProcessType);
1566 for (info = list; info && info->type; info++)
1567 if (info->type == type)
1568 break;
1569 if (! info || ! info->type)
1570 info = &default_info;
1571
1572 for (valinfo = info->values; valinfo->control; valinfo++) {
1573 __u8 *controls = uac_processing_unit_bmControls(desc, state->mixer->protocol);
1574
1575 if (! (controls[valinfo->control / 8] & (1 << ((valinfo->control % 8) - 1))))
1576 continue;
1577 map = find_map(state, unitid, valinfo->control);
1578 if (check_ignored_ctl(map))
1579 continue;
1580 cval = kzalloc(sizeof(*cval), GFP_KERNEL);
1581 if (! cval) {
1582 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
1583 return -ENOMEM;
1584 }
1585 cval->mixer = state->mixer;
1586 cval->id = unitid;
1587 cval->control = valinfo->control;
1588 cval->val_type = valinfo->val_type;
1589 cval->channels = 1;
1590
1591 /* get min/max values */
1592 if (type == UAC_PROCESS_UP_DOWNMIX && cval->control == UAC_UD_MODE_SELECT) {
1593 __u8 *control_spec = uac_processing_unit_specific(desc, state->mixer->protocol);
1594 /* FIXME: hard-coded */
1595 cval->min = 1;
1596 cval->max = control_spec[0];
1597 cval->res = 1;
1598 cval->initialized = 1;
1599 } else {
1600 if (type == USB_XU_CLOCK_RATE) {
1601 /* E-Mu USB 0404/0202/TrackerPre/0204
1602 * samplerate control quirk
1603 */
1604 cval->min = 0;
1605 cval->max = 5;
1606 cval->res = 1;
1607 cval->initialized = 1;
1608 } else
1609 get_min_max(cval, valinfo->min_value);
1610 }
1611
1612 kctl = snd_ctl_new1(&mixer_procunit_ctl, cval);
1613 if (! kctl) {
1614 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
1615 kfree(cval);
1616 return -ENOMEM;
1617 }
1618 kctl->private_free = usb_mixer_elem_free;
1619
1620 if (check_mapped_name(map, kctl->id.name,
1621 sizeof(kctl->id.name)))
1622 /* nothing */ ;
1623 else if (info->name)
1624 strlcpy(kctl->id.name, info->name, sizeof(kctl->id.name));
1625 else {
1626 nameid = uac_processing_unit_iProcessing(desc, state->mixer->protocol);
1627 len = 0;
1628 if (nameid)
1629 len = snd_usb_copy_string_desc(state, nameid, kctl->id.name, sizeof(kctl->id.name));
1630 if (! len)
1631 strlcpy(kctl->id.name, name, sizeof(kctl->id.name));
1632 }
1633 append_ctl_name(kctl, " ");
1634 append_ctl_name(kctl, valinfo->suffix);
1635
1636 snd_printdd(KERN_INFO "[%d] PU [%s] ch = %d, val = %d/%d\n",
1637 cval->id, kctl->id.name, cval->channels, cval->min, cval->max);
1638 if ((err = snd_usb_mixer_add_control(state->mixer, kctl)) < 0)
1639 return err;
1640 }
1641 return 0;
1642 }
1643
1644
1645 static int parse_audio_processing_unit(struct mixer_build *state, int unitid, void *raw_desc)
1646 {
1647 return build_audio_procunit(state, unitid, raw_desc, procunits, "Processing Unit");
1648 }
1649
1650 static int parse_audio_extension_unit(struct mixer_build *state, int unitid, void *raw_desc)
1651 {
1652 /* Note that we parse extension units with processing unit descriptors.
1653 * That's ok as the layout is the same */
1654 return build_audio_procunit(state, unitid, raw_desc, extunits, "Extension Unit");
1655 }
1656
1657
1658 /*
1659 * Selector Unit
1660 */
1661
1662 /* info callback for selector unit
1663 * use an enumerator type for routing
1664 */
1665 static int mixer_ctl_selector_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
1666 {
1667 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1668 const char **itemlist = (const char **)kcontrol->private_value;
1669
1670 if (snd_BUG_ON(!itemlist))
1671 return -EINVAL;
1672 return snd_ctl_enum_info(uinfo, 1, cval->max, itemlist);
1673 }
1674
1675 /* get callback for selector unit */
1676 static int mixer_ctl_selector_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
1677 {
1678 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1679 int val, err;
1680
1681 err = get_cur_ctl_value(cval, cval->control << 8, &val);
1682 if (err < 0) {
1683 if (cval->mixer->ignore_ctl_error) {
1684 ucontrol->value.enumerated.item[0] = 0;
1685 return 0;
1686 }
1687 return err;
1688 }
1689 val = get_relative_value(cval, val);
1690 ucontrol->value.enumerated.item[0] = val;
1691 return 0;
1692 }
1693
1694 /* put callback for selector unit */
1695 static int mixer_ctl_selector_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
1696 {
1697 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1698 int val, oval, err;
1699
1700 err = get_cur_ctl_value(cval, cval->control << 8, &oval);
1701 if (err < 0) {
1702 if (cval->mixer->ignore_ctl_error)
1703 return 0;
1704 return err;
1705 }
1706 val = ucontrol->value.enumerated.item[0];
1707 val = get_abs_value(cval, val);
1708 if (val != oval) {
1709 set_cur_ctl_value(cval, cval->control << 8, val);
1710 return 1;
1711 }
1712 return 0;
1713 }
1714
1715 /* alsa control interface for selector unit */
1716 static struct snd_kcontrol_new mixer_selectunit_ctl = {
1717 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1718 .name = "", /* will be filled later */
1719 .info = mixer_ctl_selector_info,
1720 .get = mixer_ctl_selector_get,
1721 .put = mixer_ctl_selector_put,
1722 };
1723
1724
1725 /* private free callback.
1726 * free both private_data and private_value
1727 */
1728 static void usb_mixer_selector_elem_free(struct snd_kcontrol *kctl)
1729 {
1730 int i, num_ins = 0;
1731
1732 if (kctl->private_data) {
1733 struct usb_mixer_elem_info *cval = kctl->private_data;
1734 num_ins = cval->max;
1735 kfree(cval);
1736 kctl->private_data = NULL;
1737 }
1738 if (kctl->private_value) {
1739 char **itemlist = (char **)kctl->private_value;
1740 for (i = 0; i < num_ins; i++)
1741 kfree(itemlist[i]);
1742 kfree(itemlist);
1743 kctl->private_value = 0;
1744 }
1745 }
1746
1747 /*
1748 * parse a selector unit
1749 */
1750 static int parse_audio_selector_unit(struct mixer_build *state, int unitid, void *raw_desc)
1751 {
1752 struct uac_selector_unit_descriptor *desc = raw_desc;
1753 unsigned int i, nameid, len;
1754 int err;
1755 struct usb_mixer_elem_info *cval;
1756 struct snd_kcontrol *kctl;
1757 const struct usbmix_name_map *map;
1758 char **namelist;
1759
1760 if (!desc->bNrInPins || desc->bLength < 5 + desc->bNrInPins) {
1761 snd_printk(KERN_ERR "invalid SELECTOR UNIT descriptor %d\n", unitid);
1762 return -EINVAL;
1763 }
1764
1765 for (i = 0; i < desc->bNrInPins; i++) {
1766 if ((err = parse_audio_unit(state, desc->baSourceID[i])) < 0)
1767 return err;
1768 }
1769
1770 if (desc->bNrInPins == 1) /* only one ? nonsense! */
1771 return 0;
1772
1773 map = find_map(state, unitid, 0);
1774 if (check_ignored_ctl(map))
1775 return 0;
1776
1777 cval = kzalloc(sizeof(*cval), GFP_KERNEL);
1778 if (! cval) {
1779 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
1780 return -ENOMEM;
1781 }
1782 cval->mixer = state->mixer;
1783 cval->id = unitid;
1784 cval->val_type = USB_MIXER_U8;
1785 cval->channels = 1;
1786 cval->min = 1;
1787 cval->max = desc->bNrInPins;
1788 cval->res = 1;
1789 cval->initialized = 1;
1790
1791 if (desc->bDescriptorSubtype == UAC2_CLOCK_SELECTOR)
1792 cval->control = UAC2_CX_CLOCK_SELECTOR;
1793 else
1794 cval->control = 0;
1795
1796 namelist = kmalloc(sizeof(char *) * desc->bNrInPins, GFP_KERNEL);
1797 if (! namelist) {
1798 snd_printk(KERN_ERR "cannot malloc\n");
1799 kfree(cval);
1800 return -ENOMEM;
1801 }
1802 #define MAX_ITEM_NAME_LEN 64
1803 for (i = 0; i < desc->bNrInPins; i++) {
1804 struct usb_audio_term iterm;
1805 len = 0;
1806 namelist[i] = kmalloc(MAX_ITEM_NAME_LEN, GFP_KERNEL);
1807 if (! namelist[i]) {
1808 snd_printk(KERN_ERR "cannot malloc\n");
1809 while (i--)
1810 kfree(namelist[i]);
1811 kfree(namelist);
1812 kfree(cval);
1813 return -ENOMEM;
1814 }
1815 len = check_mapped_selector_name(state, unitid, i, namelist[i],
1816 MAX_ITEM_NAME_LEN);
1817 if (! len && check_input_term(state, desc->baSourceID[i], &iterm) >= 0)
1818 len = get_term_name(state, &iterm, namelist[i], MAX_ITEM_NAME_LEN, 0);
1819 if (! len)
1820 sprintf(namelist[i], "Input %d", i);
1821 }
1822
1823 kctl = snd_ctl_new1(&mixer_selectunit_ctl, cval);
1824 if (! kctl) {
1825 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
1826 kfree(namelist);
1827 kfree(cval);
1828 return -ENOMEM;
1829 }
1830 kctl->private_value = (unsigned long)namelist;
1831 kctl->private_free = usb_mixer_selector_elem_free;
1832
1833 nameid = uac_selector_unit_iSelector(desc);
1834 len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name));
1835 if (len)
1836 ;
1837 else if (nameid)
1838 snd_usb_copy_string_desc(state, nameid, kctl->id.name, sizeof(kctl->id.name));
1839 else {
1840 len = get_term_name(state, &state->oterm,
1841 kctl->id.name, sizeof(kctl->id.name), 0);
1842 if (! len)
1843 strlcpy(kctl->id.name, "USB", sizeof(kctl->id.name));
1844
1845 if (desc->bDescriptorSubtype == UAC2_CLOCK_SELECTOR)
1846 append_ctl_name(kctl, " Clock Source");
1847 else if ((state->oterm.type & 0xff00) == 0x0100)
1848 append_ctl_name(kctl, " Capture Source");
1849 else
1850 append_ctl_name(kctl, " Playback Source");
1851 }
1852
1853 snd_printdd(KERN_INFO "[%d] SU [%s] items = %d\n",
1854 cval->id, kctl->id.name, desc->bNrInPins);
1855 if ((err = snd_usb_mixer_add_control(state->mixer, kctl)) < 0)
1856 return err;
1857
1858 return 0;
1859 }
1860
1861
1862 /*
1863 * parse an audio unit recursively
1864 */
1865
1866 static int parse_audio_unit(struct mixer_build *state, int unitid)
1867 {
1868 unsigned char *p1;
1869
1870 if (test_and_set_bit(unitid, state->unitbitmap))
1871 return 0; /* the unit already visited */
1872
1873 p1 = find_audio_control_unit(state, unitid);
1874 if (!p1) {
1875 snd_printk(KERN_ERR "usbaudio: unit %d not found!\n", unitid);
1876 return -EINVAL;
1877 }
1878
1879 switch (p1[2]) {
1880 case UAC_INPUT_TERMINAL:
1881 case UAC2_CLOCK_SOURCE:
1882 return 0; /* NOP */
1883 case UAC_MIXER_UNIT:
1884 return parse_audio_mixer_unit(state, unitid, p1);
1885 case UAC_SELECTOR_UNIT:
1886 case UAC2_CLOCK_SELECTOR:
1887 return parse_audio_selector_unit(state, unitid, p1);
1888 case UAC_FEATURE_UNIT:
1889 return parse_audio_feature_unit(state, unitid, p1);
1890 case UAC1_PROCESSING_UNIT:
1891 /* UAC2_EFFECT_UNIT has the same value */
1892 if (state->mixer->protocol == UAC_VERSION_1)
1893 return parse_audio_processing_unit(state, unitid, p1);
1894 else
1895 return 0; /* FIXME - effect units not implemented yet */
1896 case UAC1_EXTENSION_UNIT:
1897 /* UAC2_PROCESSING_UNIT_V2 has the same value */
1898 if (state->mixer->protocol == UAC_VERSION_1)
1899 return parse_audio_extension_unit(state, unitid, p1);
1900 else /* UAC_VERSION_2 */
1901 return parse_audio_processing_unit(state, unitid, p1);
1902 default:
1903 snd_printk(KERN_ERR "usbaudio: unit %u: unexpected type 0x%02x\n", unitid, p1[2]);
1904 return -EINVAL;
1905 }
1906 }
1907
1908 static void snd_usb_mixer_free(struct usb_mixer_interface *mixer)
1909 {
1910 kfree(mixer->id_elems);
1911 if (mixer->urb) {
1912 kfree(mixer->urb->transfer_buffer);
1913 usb_free_urb(mixer->urb);
1914 }
1915 usb_free_urb(mixer->rc_urb);
1916 kfree(mixer->rc_setup_packet);
1917 kfree(mixer);
1918 }
1919
1920 static int snd_usb_mixer_dev_free(struct snd_device *device)
1921 {
1922 struct usb_mixer_interface *mixer = device->device_data;
1923 snd_usb_mixer_free(mixer);
1924 return 0;
1925 }
1926
1927 /*
1928 * create mixer controls
1929 *
1930 * walk through all UAC_OUTPUT_TERMINAL descriptors to search for mixers
1931 */
1932 static int snd_usb_mixer_controls(struct usb_mixer_interface *mixer)
1933 {
1934 struct mixer_build state;
1935 int err;
1936 const struct usbmix_ctl_map *map;
1937 struct usb_host_interface *hostif;
1938 void *p;
1939
1940 hostif = mixer->chip->ctrl_intf;
1941 memset(&state, 0, sizeof(state));
1942 state.chip = mixer->chip;
1943 state.mixer = mixer;
1944 state.buffer = hostif->extra;
1945 state.buflen = hostif->extralen;
1946
1947 /* check the mapping table */
1948 for (map = usbmix_ctl_maps; map->id; map++) {
1949 if (map->id == state.chip->usb_id) {
1950 state.map = map->map;
1951 state.selector_map = map->selector_map;
1952 mixer->ignore_ctl_error = map->ignore_ctl_error;
1953 break;
1954 }
1955 }
1956
1957 p = NULL;
1958 while ((p = snd_usb_find_csint_desc(hostif->extra, hostif->extralen, p, UAC_OUTPUT_TERMINAL)) != NULL) {
1959 if (mixer->protocol == UAC_VERSION_1) {
1960 struct uac1_output_terminal_descriptor *desc = p;
1961
1962 if (desc->bLength < sizeof(*desc))
1963 continue; /* invalid descriptor? */
1964 set_bit(desc->bTerminalID, state.unitbitmap); /* mark terminal ID as visited */
1965 state.oterm.id = desc->bTerminalID;
1966 state.oterm.type = le16_to_cpu(desc->wTerminalType);
1967 state.oterm.name = desc->iTerminal;
1968 err = parse_audio_unit(&state, desc->bSourceID);
1969 if (err < 0)
1970 return err;
1971 } else { /* UAC_VERSION_2 */
1972 struct uac2_output_terminal_descriptor *desc = p;
1973
1974 if (desc->bLength < sizeof(*desc))
1975 continue; /* invalid descriptor? */
1976 set_bit(desc->bTerminalID, state.unitbitmap); /* mark terminal ID as visited */
1977 state.oterm.id = desc->bTerminalID;
1978 state.oterm.type = le16_to_cpu(desc->wTerminalType);
1979 state.oterm.name = desc->iTerminal;
1980 err = parse_audio_unit(&state, desc->bSourceID);
1981 if (err < 0)
1982 return err;
1983
1984 /* for UAC2, use the same approach to also add the clock selectors */
1985 err = parse_audio_unit(&state, desc->bCSourceID);
1986 if (err < 0)
1987 return err;
1988 }
1989 }
1990
1991 return 0;
1992 }
1993
1994 void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer, int unitid)
1995 {
1996 struct usb_mixer_elem_info *info;
1997
1998 for (info = mixer->id_elems[unitid]; info; info = info->next_id_elem)
1999 snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
2000 info->elem_id);
2001 }
2002
2003 static void snd_usb_mixer_dump_cval(struct snd_info_buffer *buffer,
2004 int unitid,
2005 struct usb_mixer_elem_info *cval)
2006 {
2007 static char *val_types[] = {"BOOLEAN", "INV_BOOLEAN",
2008 "S8", "U8", "S16", "U16"};
2009 snd_iprintf(buffer, " Unit: %i\n", unitid);
2010 if (cval->elem_id)
2011 snd_iprintf(buffer, " Control: name=\"%s\", index=%i\n",
2012 cval->elem_id->name, cval->elem_id->index);
2013 snd_iprintf(buffer, " Info: id=%i, control=%i, cmask=0x%x, "
2014 "channels=%i, type=\"%s\"\n", cval->id,
2015 cval->control, cval->cmask, cval->channels,
2016 val_types[cval->val_type]);
2017 snd_iprintf(buffer, " Volume: min=%i, max=%i, dBmin=%i, dBmax=%i\n",
2018 cval->min, cval->max, cval->dBmin, cval->dBmax);
2019 }
2020
2021 static void snd_usb_mixer_proc_read(struct snd_info_entry *entry,
2022 struct snd_info_buffer *buffer)
2023 {
2024 struct snd_usb_audio *chip = entry->private_data;
2025 struct usb_mixer_interface *mixer;
2026 struct usb_mixer_elem_info *cval;
2027 int unitid;
2028
2029 list_for_each_entry(mixer, &chip->mixer_list, list) {
2030 snd_iprintf(buffer,
2031 "USB Mixer: usb_id=0x%08x, ctrlif=%i, ctlerr=%i\n",
2032 chip->usb_id, snd_usb_ctrl_intf(chip),
2033 mixer->ignore_ctl_error);
2034 snd_iprintf(buffer, "Card: %s\n", chip->card->longname);
2035 for (unitid = 0; unitid < MAX_ID_ELEMS; unitid++) {
2036 for (cval = mixer->id_elems[unitid]; cval;
2037 cval = cval->next_id_elem)
2038 snd_usb_mixer_dump_cval(buffer, unitid, cval);
2039 }
2040 }
2041 }
2042
2043 static void snd_usb_mixer_interrupt_v2(struct usb_mixer_interface *mixer,
2044 int attribute, int value, int index)
2045 {
2046 struct usb_mixer_elem_info *info;
2047 __u8 unitid = (index >> 8) & 0xff;
2048 __u8 control = (value >> 8) & 0xff;
2049 __u8 channel = value & 0xff;
2050
2051 if (channel >= MAX_CHANNELS) {
2052 snd_printk(KERN_DEBUG "%s(): bogus channel number %d\n",
2053 __func__, channel);
2054 return;
2055 }
2056
2057 for (info = mixer->id_elems[unitid]; info; info = info->next_id_elem) {
2058 if (info->control != control)
2059 continue;
2060
2061 switch (attribute) {
2062 case UAC2_CS_CUR:
2063 /* invalidate cache, so the value is read from the device */
2064 if (channel)
2065 info->cached &= ~(1 << channel);
2066 else /* master channel */
2067 info->cached = 0;
2068
2069 snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
2070 info->elem_id);
2071 break;
2072
2073 case UAC2_CS_RANGE:
2074 /* TODO */
2075 break;
2076
2077 case UAC2_CS_MEM:
2078 /* TODO */
2079 break;
2080
2081 default:
2082 snd_printk(KERN_DEBUG "unknown attribute %d in interrupt\n",
2083 attribute);
2084 break;
2085 } /* switch */
2086 }
2087 }
2088
2089 static void snd_usb_mixer_interrupt(struct urb *urb)
2090 {
2091 struct usb_mixer_interface *mixer = urb->context;
2092 int len = urb->actual_length;
2093 int ustatus = urb->status;
2094
2095 if (ustatus != 0)
2096 goto requeue;
2097
2098 if (mixer->protocol == UAC_VERSION_1) {
2099 struct uac1_status_word *status;
2100
2101 for (status = urb->transfer_buffer;
2102 len >= sizeof(*status);
2103 len -= sizeof(*status), status++) {
2104 snd_printd(KERN_DEBUG "status interrupt: %02x %02x\n",
2105 status->bStatusType,
2106 status->bOriginator);
2107
2108 /* ignore any notifications not from the control interface */
2109 if ((status->bStatusType & UAC1_STATUS_TYPE_ORIG_MASK) !=
2110 UAC1_STATUS_TYPE_ORIG_AUDIO_CONTROL_IF)
2111 continue;
2112
2113 if (status->bStatusType & UAC1_STATUS_TYPE_MEM_CHANGED)
2114 snd_usb_mixer_rc_memory_change(mixer, status->bOriginator);
2115 else
2116 snd_usb_mixer_notify_id(mixer, status->bOriginator);
2117 }
2118 } else { /* UAC_VERSION_2 */
2119 struct uac2_interrupt_data_msg *msg;
2120
2121 for (msg = urb->transfer_buffer;
2122 len >= sizeof(*msg);
2123 len -= sizeof(*msg), msg++) {
2124 /* drop vendor specific and endpoint requests */
2125 if ((msg->bInfo & UAC2_INTERRUPT_DATA_MSG_VENDOR) ||
2126 (msg->bInfo & UAC2_INTERRUPT_DATA_MSG_EP))
2127 continue;
2128
2129 snd_usb_mixer_interrupt_v2(mixer, msg->bAttribute,
2130 le16_to_cpu(msg->wValue),
2131 le16_to_cpu(msg->wIndex));
2132 }
2133 }
2134
2135 requeue:
2136 if (ustatus != -ENOENT && ustatus != -ECONNRESET && ustatus != -ESHUTDOWN) {
2137 urb->dev = mixer->chip->dev;
2138 usb_submit_urb(urb, GFP_ATOMIC);
2139 }
2140 }
2141
2142 /* stop any bus activity of a mixer */
2143 void snd_usb_mixer_inactivate(struct usb_mixer_interface *mixer)
2144 {
2145 usb_kill_urb(mixer->urb);
2146 usb_kill_urb(mixer->rc_urb);
2147 }
2148
2149 int snd_usb_mixer_activate(struct usb_mixer_interface *mixer)
2150 {
2151 int err;
2152
2153 if (mixer->urb) {
2154 err = usb_submit_urb(mixer->urb, GFP_NOIO);
2155 if (err < 0)
2156 return err;
2157 }
2158
2159 return 0;
2160 }
2161
2162 /* create the handler for the optional status interrupt endpoint */
2163 static int snd_usb_mixer_status_create(struct usb_mixer_interface *mixer)
2164 {
2165 struct usb_host_interface *hostif;
2166 struct usb_endpoint_descriptor *ep;
2167 void *transfer_buffer;
2168 int buffer_length;
2169 unsigned int epnum;
2170
2171 hostif = mixer->chip->ctrl_intf;
2172 /* we need one interrupt input endpoint */
2173 if (get_iface_desc(hostif)->bNumEndpoints < 1)
2174 return 0;
2175 ep = get_endpoint(hostif, 0);
2176 if (!usb_endpoint_dir_in(ep) || !usb_endpoint_xfer_int(ep))
2177 return 0;
2178
2179 epnum = usb_endpoint_num(ep);
2180 buffer_length = le16_to_cpu(ep->wMaxPacketSize);
2181 transfer_buffer = kmalloc(buffer_length, GFP_KERNEL);
2182 if (!transfer_buffer)
2183 return -ENOMEM;
2184 mixer->urb = usb_alloc_urb(0, GFP_KERNEL);
2185 if (!mixer->urb) {
2186 kfree(transfer_buffer);
2187 return -ENOMEM;
2188 }
2189 usb_fill_int_urb(mixer->urb, mixer->chip->dev,
2190 usb_rcvintpipe(mixer->chip->dev, epnum),
2191 transfer_buffer, buffer_length,
2192 snd_usb_mixer_interrupt, mixer, ep->bInterval);
2193 usb_submit_urb(mixer->urb, GFP_KERNEL);
2194 return 0;
2195 }
2196
2197 int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif,
2198 int ignore_error)
2199 {
2200 static struct snd_device_ops dev_ops = {
2201 .dev_free = snd_usb_mixer_dev_free
2202 };
2203 struct usb_mixer_interface *mixer;
2204 struct snd_info_entry *entry;
2205 struct usb_host_interface *host_iface;
2206 int err;
2207
2208 strcpy(chip->card->mixername, "USB Mixer");
2209
2210 mixer = kzalloc(sizeof(*mixer), GFP_KERNEL);
2211 if (!mixer)
2212 return -ENOMEM;
2213 mixer->chip = chip;
2214 mixer->ignore_ctl_error = ignore_error;
2215 mixer->id_elems = kcalloc(MAX_ID_ELEMS, sizeof(*mixer->id_elems),
2216 GFP_KERNEL);
2217 if (!mixer->id_elems) {
2218 kfree(mixer);
2219 return -ENOMEM;
2220 }
2221
2222 host_iface = &usb_ifnum_to_if(chip->dev, ctrlif)->altsetting[0];
2223 switch (get_iface_desc(host_iface)->bInterfaceProtocol) {
2224 case UAC_VERSION_1:
2225 default:
2226 mixer->protocol = UAC_VERSION_1;
2227 break;
2228 case UAC_VERSION_2:
2229 mixer->protocol = UAC_VERSION_2;
2230 break;
2231 }
2232
2233 if ((err = snd_usb_mixer_controls(mixer)) < 0 ||
2234 (err = snd_usb_mixer_status_create(mixer)) < 0)
2235 goto _error;
2236
2237 snd_usb_mixer_apply_create_quirk(mixer);
2238
2239 err = snd_device_new(chip->card, SNDRV_DEV_LOWLEVEL, mixer, &dev_ops);
2240 if (err < 0)
2241 goto _error;
2242
2243 if (list_empty(&chip->mixer_list) &&
2244 !snd_card_proc_new(chip->card, "usbmixer", &entry))
2245 snd_info_set_text_ops(entry, chip, snd_usb_mixer_proc_read);
2246
2247 list_add(&mixer->list, &chip->mixer_list);
2248 return 0;
2249
2250 _error:
2251 snd_usb_mixer_free(mixer);
2252 return err;
2253 }
2254
2255 void snd_usb_mixer_disconnect(struct list_head *p)
2256 {
2257 struct usb_mixer_interface *mixer;
2258
2259 mixer = list_entry(p, struct usb_mixer_interface, list);
2260 usb_kill_urb(mixer->urb);
2261 usb_kill_urb(mixer->rc_urb);
2262 }
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