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fs/Makefile: Stupid typo breakage of exofs inclusion
[linux-btrfs-devel.git] / sound / usb / mixer.c
blobcdd19d7fe500b2a6315b3023212f1313032c5999
1 /*
2 * (Tentative) USB Audio Driver for ALSA
3 *
4 * Mixer control part
5 *
6 * Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
7 *
8 * Many codes borrowed from audio.c by
9 * Alan Cox (alan@lxorguk.ukuu.org.uk)
10 * Thomas Sailer (sailer@ife.ee.ethz.ch)
11 *
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 *
27 */
28
29 /*
30 * TODOs, for both the mixer and the streaming interfaces:
31 *
32 * - support for UAC2 effect units
33 * - support for graphical equalizers
34 * - RANGE and MEM set commands (UAC2)
35 * - RANGE and MEM interrupt dispatchers (UAC2)
36 * - audio channel clustering (UAC2)
37 * - audio sample rate converter units (UAC2)
38 * - proper handling of clock multipliers (UAC2)
39 * - dispatch clock change notifications (UAC2)
40 * - stop PCM streams which use a clock that became invalid
41 * - stop PCM streams which use a clock selector that has changed
42 * - parse available sample rates again when clock sources changed
43 */
44
45 #include <linux/bitops.h>
46 #include <linux/init.h>
47 #include <linux/list.h>
48 #include <linux/slab.h>
49 #include <linux/string.h>
50 #include <linux/usb.h>
51 #include <linux/usb/audio.h>
52 #include <linux/usb/audio-v2.h>
53
54 #include <sound/core.h>
55 #include <sound/control.h>
56 #include <sound/hwdep.h>
57 #include <sound/info.h>
58 #include <sound/tlv.h>
59
60 #include "usbaudio.h"
61 #include "mixer.h"
62 #include "helper.h"
63 #include "mixer_quirks.h"
64 #include "power.h"
65
66 #define MAX_ID_ELEMS 256
67
68 struct usb_audio_term {
69 int id;
70 int type;
71 int channels;
72 unsigned int chconfig;
73 int name;
74 };
75
76 struct usbmix_name_map;
77
78 struct mixer_build {
79 struct snd_usb_audio *chip;
80 struct usb_mixer_interface *mixer;
81 unsigned char *buffer;
82 unsigned int buflen;
83 DECLARE_BITMAP(unitbitmap, MAX_ID_ELEMS);
84 struct usb_audio_term oterm;
85 const struct usbmix_name_map *map;
86 const struct usbmix_selector_map *selector_map;
87 };
88
89 /*E-mu 0202/0404/0204 eXtension Unit(XU) control*/
90 enum {
91 USB_XU_CLOCK_RATE = 0xe301,
92 USB_XU_CLOCK_SOURCE = 0xe302,
93 USB_XU_DIGITAL_IO_STATUS = 0xe303,
94 USB_XU_DEVICE_OPTIONS = 0xe304,
95 USB_XU_DIRECT_MONITORING = 0xe305,
96 USB_XU_METERING = 0xe306
97 };
98 enum {
99 USB_XU_CLOCK_SOURCE_SELECTOR = 0x02, /* clock source*/
100 USB_XU_CLOCK_RATE_SELECTOR = 0x03, /* clock rate */
101 USB_XU_DIGITAL_FORMAT_SELECTOR = 0x01, /* the spdif format */
102 USB_XU_SOFT_LIMIT_SELECTOR = 0x03 /* soft limiter */
103 };
104
105 /*
106 * manual mapping of mixer names
107 * if the mixer topology is too complicated and the parsed names are
108 * ambiguous, add the entries in usbmixer_maps.c.
109 */
110 #include "mixer_maps.c"
111
112 static const struct usbmix_name_map *
113 find_map(struct mixer_build *state, int unitid, int control)
114 {
115 const struct usbmix_name_map *p = state->map;
116
117 if (!p)
118 return NULL;
119
120 for (p = state->map; p->id; p++) {
121 if (p->id == unitid &&
122 (!control || !p->control || control == p->control))
123 return p;
124 }
125 return NULL;
126 }
127
128 /* get the mapped name if the unit matches */
129 static int
130 check_mapped_name(const struct usbmix_name_map *p, char *buf, int buflen)
131 {
132 if (!p || !p->name)
133 return 0;
134
135 buflen--;
136 return strlcpy(buf, p->name, buflen);
137 }
138
139 /* check whether the control should be ignored */
140 static inline int
141 check_ignored_ctl(const struct usbmix_name_map *p)
142 {
143 if (!p || p->name || p->dB)
144 return 0;
145 return 1;
146 }
147
148 /* dB mapping */
149 static inline void check_mapped_dB(const struct usbmix_name_map *p,
150 struct usb_mixer_elem_info *cval)
151 {
152 if (p && p->dB) {
153 cval->dBmin = p->dB->min;
154 cval->dBmax = p->dB->max;
155 cval->initialized = 1;
156 }
157 }
158
159 /* get the mapped selector source name */
160 static int check_mapped_selector_name(struct mixer_build *state, int unitid,
161 int index, char *buf, int buflen)
162 {
163 const struct usbmix_selector_map *p;
164
165 if (! state->selector_map)
166 return 0;
167 for (p = state->selector_map; p->id; p++) {
168 if (p->id == unitid && index < p->count)
169 return strlcpy(buf, p->names[index], buflen);
170 }
171 return 0;
172 }
173
174 /*
175 * find an audio control unit with the given unit id
176 */
177 static void *find_audio_control_unit(struct mixer_build *state, unsigned char unit)
178 {
179 /* we just parse the header */
180 struct uac_feature_unit_descriptor *hdr = NULL;
181
182 while ((hdr = snd_usb_find_desc(state->buffer, state->buflen, hdr,
183 USB_DT_CS_INTERFACE)) != NULL) {
184 if (hdr->bLength >= 4 &&
185 hdr->bDescriptorSubtype >= UAC_INPUT_TERMINAL &&
186 hdr->bDescriptorSubtype <= UAC2_SAMPLE_RATE_CONVERTER &&
187 hdr->bUnitID == unit)
188 return hdr;
189 }
190
191 return NULL;
192 }
193
194 /*
195 * copy a string with the given id
196 */
197 static int snd_usb_copy_string_desc(struct mixer_build *state, int index, char *buf, int maxlen)
198 {
199 int len = usb_string(state->chip->dev, index, buf, maxlen - 1);
200 buf[len] = 0;
201 return len;
202 }
203
204 /*
205 * convert from the byte/word on usb descriptor to the zero-based integer
206 */
207 static int convert_signed_value(struct usb_mixer_elem_info *cval, int val)
208 {
209 switch (cval->val_type) {
210 case USB_MIXER_BOOLEAN:
211 return !!val;
212 case USB_MIXER_INV_BOOLEAN:
213 return !val;
214 case USB_MIXER_U8:
215 val &= 0xff;
216 break;
217 case USB_MIXER_S8:
218 val &= 0xff;
219 if (val >= 0x80)
220 val -= 0x100;
221 break;
222 case USB_MIXER_U16:
223 val &= 0xffff;
224 break;
225 case USB_MIXER_S16:
226 val &= 0xffff;
227 if (val >= 0x8000)
228 val -= 0x10000;
229 break;
230 }
231 return val;
232 }
233
234 /*
235 * convert from the zero-based int to the byte/word for usb descriptor
236 */
237 static int convert_bytes_value(struct usb_mixer_elem_info *cval, int val)
238 {
239 switch (cval->val_type) {
240 case USB_MIXER_BOOLEAN:
241 return !!val;
242 case USB_MIXER_INV_BOOLEAN:
243 return !val;
244 case USB_MIXER_S8:
245 case USB_MIXER_U8:
246 return val & 0xff;
247 case USB_MIXER_S16:
248 case USB_MIXER_U16:
249 return val & 0xffff;
250 }
251 return 0; /* not reached */
252 }
253
254 static int get_relative_value(struct usb_mixer_elem_info *cval, int val)
255 {
256 if (! cval->res)
257 cval->res = 1;
258 if (val < cval->min)
259 return 0;
260 else if (val >= cval->max)
261 return (cval->max - cval->min + cval->res - 1) / cval->res;
262 else
263 return (val - cval->min) / cval->res;
264 }
265
266 static int get_abs_value(struct usb_mixer_elem_info *cval, int val)
267 {
268 if (val < 0)
269 return cval->min;
270 if (! cval->res)
271 cval->res = 1;
272 val *= cval->res;
273 val += cval->min;
274 if (val > cval->max)
275 return cval->max;
276 return val;
277 }
278
279
280 /*
281 * retrieve a mixer value
282 */
283
284 static int get_ctl_value_v1(struct usb_mixer_elem_info *cval, int request, int validx, int *value_ret)
285 {
286 struct snd_usb_audio *chip = cval->mixer->chip;
287 unsigned char buf[2];
288 int val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1;
289 int timeout = 10;
290 int err;
291
292 err = snd_usb_autoresume(cval->mixer->chip);
293 if (err < 0)
294 return -EIO;
295 while (timeout-- > 0) {
296 if (snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), request,
297 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
298 validx, snd_usb_ctrl_intf(chip) | (cval->id << 8),
299 buf, val_len, 100) >= val_len) {
300 *value_ret = convert_signed_value(cval, snd_usb_combine_bytes(buf, val_len));
301 snd_usb_autosuspend(cval->mixer->chip);
302 return 0;
303 }
304 }
305 snd_usb_autosuspend(cval->mixer->chip);
306 snd_printdd(KERN_ERR "cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n",
307 request, validx, snd_usb_ctrl_intf(chip) | (cval->id << 8), cval->val_type);
308 return -EINVAL;
309 }
310
311 static int get_ctl_value_v2(struct usb_mixer_elem_info *cval, int request, int validx, int *value_ret)
312 {
313 struct snd_usb_audio *chip = cval->mixer->chip;
314 unsigned char buf[2 + 3*sizeof(__u16)]; /* enough space for one range */
315 unsigned char *val;
316 int ret, size;
317 __u8 bRequest;
318
319 if (request == UAC_GET_CUR) {
320 bRequest = UAC2_CS_CUR;
321 size = sizeof(__u16);
322 } else {
323 bRequest = UAC2_CS_RANGE;
324 size = sizeof(buf);
325 }
326
327 memset(buf, 0, sizeof(buf));
328
329 ret = snd_usb_autoresume(chip) ? -EIO : 0;
330 if (ret)
331 goto error;
332
333 ret = snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), bRequest,
334 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
335 validx, snd_usb_ctrl_intf(chip) | (cval->id << 8),
336 buf, size, 1000);
337 snd_usb_autosuspend(chip);
338
339 if (ret < 0) {
340 error:
341 snd_printk(KERN_ERR "cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n",
342 request, validx, snd_usb_ctrl_intf(chip) | (cval->id << 8), cval->val_type);
343 return ret;
344 }
345
346 /* FIXME: how should we handle multiple triplets here? */
347
348 switch (request) {
349 case UAC_GET_CUR:
350 val = buf;
351 break;
352 case UAC_GET_MIN:
353 val = buf + sizeof(__u16);
354 break;
355 case UAC_GET_MAX:
356 val = buf + sizeof(__u16) * 2;
357 break;
358 case UAC_GET_RES:
359 val = buf + sizeof(__u16) * 3;
360 break;
361 default:
362 return -EINVAL;
363 }
364
365 *value_ret = convert_signed_value(cval, snd_usb_combine_bytes(val, sizeof(__u16)));
366
367 return 0;
368 }
369
370 static int get_ctl_value(struct usb_mixer_elem_info *cval, int request, int validx, int *value_ret)
371 {
372 return (cval->mixer->protocol == UAC_VERSION_1) ?
373 get_ctl_value_v1(cval, request, validx, value_ret) :
374 get_ctl_value_v2(cval, request, validx, value_ret);
375 }
376
377 static int get_cur_ctl_value(struct usb_mixer_elem_info *cval, int validx, int *value)
378 {
379 return get_ctl_value(cval, UAC_GET_CUR, validx, value);
380 }
381
382 /* channel = 0: master, 1 = first channel */
383 static inline int get_cur_mix_raw(struct usb_mixer_elem_info *cval,
384 int channel, int *value)
385 {
386 return get_ctl_value(cval, UAC_GET_CUR, (cval->control << 8) | channel, value);
387 }
388
389 static int get_cur_mix_value(struct usb_mixer_elem_info *cval,
390 int channel, int index, int *value)
391 {
392 int err;
393
394 if (cval->cached & (1 << channel)) {
395 *value = cval->cache_val[index];
396 return 0;
397 }
398 err = get_cur_mix_raw(cval, channel, value);
399 if (err < 0) {
400 if (!cval->mixer->ignore_ctl_error)
401 snd_printd(KERN_ERR "cannot get current value for control %d ch %d: err = %d\n",
402 cval->control, channel, err);
403 return err;
404 }
405 cval->cached |= 1 << channel;
406 cval->cache_val[index] = *value;
407 return 0;
408 }
409
410
411 /*
412 * set a mixer value
413 */
414
415 int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval,
416 int request, int validx, int value_set)
417 {
418 struct snd_usb_audio *chip = cval->mixer->chip;
419 unsigned char buf[2];
420 int val_len, err, timeout = 10;
421
422 if (cval->mixer->protocol == UAC_VERSION_1) {
423 val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1;
424 } else { /* UAC_VERSION_2 */
425 /* audio class v2 controls are always 2 bytes in size */
426 val_len = sizeof(__u16);
427
428 /* FIXME */
429 if (request != UAC_SET_CUR) {
430 snd_printdd(KERN_WARNING "RANGE setting not yet supported\n");
431 return -EINVAL;
432 }
433
434 request = UAC2_CS_CUR;
435 }
436
437 value_set = convert_bytes_value(cval, value_set);
438 buf[0] = value_set & 0xff;
439 buf[1] = (value_set >> 8) & 0xff;
440 err = snd_usb_autoresume(chip);
441 if (err < 0)
442 return -EIO;
443 while (timeout-- > 0)
444 if (snd_usb_ctl_msg(chip->dev,
445 usb_sndctrlpipe(chip->dev, 0), request,
446 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
447 validx, snd_usb_ctrl_intf(chip) | (cval->id << 8),
448 buf, val_len, 100) >= 0) {
449 snd_usb_autosuspend(chip);
450 return 0;
451 }
452 snd_usb_autosuspend(chip);
453 snd_printdd(KERN_ERR "cannot set ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d, data = %#x/%#x\n",
454 request, validx, snd_usb_ctrl_intf(chip) | (cval->id << 8), cval->val_type, buf[0], buf[1]);
455 return -EINVAL;
456 }
457
458 static int set_cur_ctl_value(struct usb_mixer_elem_info *cval, int validx, int value)
459 {
460 return snd_usb_mixer_set_ctl_value(cval, UAC_SET_CUR, validx, value);
461 }
462
463 static int set_cur_mix_value(struct usb_mixer_elem_info *cval, int channel,
464 int index, int value)
465 {
466 int err;
467 unsigned int read_only = (channel == 0) ?
468 cval->master_readonly :
469 cval->ch_readonly & (1 << (channel - 1));
470
471 if (read_only) {
472 snd_printdd(KERN_INFO "%s(): channel %d of control %d is read_only\n",
473 __func__, channel, cval->control);
474 return 0;
475 }
476
477 err = snd_usb_mixer_set_ctl_value(cval, UAC_SET_CUR, (cval->control << 8) | channel,
478 value);
479 if (err < 0)
480 return err;
481 cval->cached |= 1 << channel;
482 cval->cache_val[index] = value;
483 return 0;
484 }
485
486 /*
487 * TLV callback for mixer volume controls
488 */
489 static int mixer_vol_tlv(struct snd_kcontrol *kcontrol, int op_flag,
490 unsigned int size, unsigned int __user *_tlv)
491 {
492 struct usb_mixer_elem_info *cval = kcontrol->private_data;
493 DECLARE_TLV_DB_MINMAX(scale, 0, 0);
494
495 if (size < sizeof(scale))
496 return -ENOMEM;
497 scale[2] = cval->dBmin;
498 scale[3] = cval->dBmax;
499 if (copy_to_user(_tlv, scale, sizeof(scale)))
500 return -EFAULT;
501 return 0;
502 }
503
504 /*
505 * parser routines begin here...
506 */
507
508 static int parse_audio_unit(struct mixer_build *state, int unitid);
509
510
511 /*
512 * check if the input/output channel routing is enabled on the given bitmap.
513 * used for mixer unit parser
514 */
515 static int check_matrix_bitmap(unsigned char *bmap, int ich, int och, int num_outs)
516 {
517 int idx = ich * num_outs + och;
518 return bmap[idx >> 3] & (0x80 >> (idx & 7));
519 }
520
521
522 /*
523 * add an alsa control element
524 * search and increment the index until an empty slot is found.
525 *
526 * if failed, give up and free the control instance.
527 */
528
529 int snd_usb_mixer_add_control(struct usb_mixer_interface *mixer,
530 struct snd_kcontrol *kctl)
531 {
532 struct usb_mixer_elem_info *cval = kctl->private_data;
533 int err;
534
535 while (snd_ctl_find_id(mixer->chip->card, &kctl->id))
536 kctl->id.index++;
537 if ((err = snd_ctl_add(mixer->chip->card, kctl)) < 0) {
538 snd_printd(KERN_ERR "cannot add control (err = %d)\n", err);
539 return err;
540 }
541 cval->elem_id = &kctl->id;
542 cval->next_id_elem = mixer->id_elems[cval->id];
543 mixer->id_elems[cval->id] = cval;
544 return 0;
545 }
546
547
548 /*
549 * get a terminal name string
550 */
551
552 static struct iterm_name_combo {
553 int type;
554 char *name;
555 } iterm_names[] = {
556 { 0x0300, "Output" },
557 { 0x0301, "Speaker" },
558 { 0x0302, "Headphone" },
559 { 0x0303, "HMD Audio" },
560 { 0x0304, "Desktop Speaker" },
561 { 0x0305, "Room Speaker" },
562 { 0x0306, "Com Speaker" },
563 { 0x0307, "LFE" },
564 { 0x0600, "External In" },
565 { 0x0601, "Analog In" },
566 { 0x0602, "Digital In" },
567 { 0x0603, "Line" },
568 { 0x0604, "Legacy In" },
569 { 0x0605, "IEC958 In" },
570 { 0x0606, "1394 DA Stream" },
571 { 0x0607, "1394 DV Stream" },
572 { 0x0700, "Embedded" },
573 { 0x0701, "Noise Source" },
574 { 0x0702, "Equalization Noise" },
575 { 0x0703, "CD" },
576 { 0x0704, "DAT" },
577 { 0x0705, "DCC" },
578 { 0x0706, "MiniDisk" },
579 { 0x0707, "Analog Tape" },
580 { 0x0708, "Phonograph" },
581 { 0x0709, "VCR Audio" },
582 { 0x070a, "Video Disk Audio" },
583 { 0x070b, "DVD Audio" },
584 { 0x070c, "TV Tuner Audio" },
585 { 0x070d, "Satellite Rec Audio" },
586 { 0x070e, "Cable Tuner Audio" },
587 { 0x070f, "DSS Audio" },
588 { 0x0710, "Radio Receiver" },
589 { 0x0711, "Radio Transmitter" },
590 { 0x0712, "Multi-Track Recorder" },
591 { 0x0713, "Synthesizer" },
592 { 0 },
593 };
594
595 static int get_term_name(struct mixer_build *state, struct usb_audio_term *iterm,
596 unsigned char *name, int maxlen, int term_only)
597 {
598 struct iterm_name_combo *names;
599
600 if (iterm->name)
601 return snd_usb_copy_string_desc(state, iterm->name, name, maxlen);
602
603 /* virtual type - not a real terminal */
604 if (iterm->type >> 16) {
605 if (term_only)
606 return 0;
607 switch (iterm->type >> 16) {
608 case UAC_SELECTOR_UNIT:
609 strcpy(name, "Selector"); return 8;
610 case UAC1_PROCESSING_UNIT:
611 strcpy(name, "Process Unit"); return 12;
612 case UAC1_EXTENSION_UNIT:
613 strcpy(name, "Ext Unit"); return 8;
614 case UAC_MIXER_UNIT:
615 strcpy(name, "Mixer"); return 5;
616 default:
617 return sprintf(name, "Unit %d", iterm->id);
618 }
619 }
620
621 switch (iterm->type & 0xff00) {
622 case 0x0100:
623 strcpy(name, "PCM"); return 3;
624 case 0x0200:
625 strcpy(name, "Mic"); return 3;
626 case 0x0400:
627 strcpy(name, "Headset"); return 7;
628 case 0x0500:
629 strcpy(name, "Phone"); return 5;
630 }
631
632 for (names = iterm_names; names->type; names++)
633 if (names->type == iterm->type) {
634 strcpy(name, names->name);
635 return strlen(names->name);
636 }
637 return 0;
638 }
639
640
641 /*
642 * parse the source unit recursively until it reaches to a terminal
643 * or a branched unit.
644 */
645 static int check_input_term(struct mixer_build *state, int id, struct usb_audio_term *term)
646 {
647 int err;
648 void *p1;
649
650 memset(term, 0, sizeof(*term));
651 while ((p1 = find_audio_control_unit(state, id)) != NULL) {
652 unsigned char *hdr = p1;
653 term->id = id;
654 switch (hdr[2]) {
655 case UAC_INPUT_TERMINAL:
656 if (state->mixer->protocol == UAC_VERSION_1) {
657 struct uac_input_terminal_descriptor *d = p1;
658 term->type = le16_to_cpu(d->wTerminalType);
659 term->channels = d->bNrChannels;
660 term->chconfig = le16_to_cpu(d->wChannelConfig);
661 term->name = d->iTerminal;
662 } else { /* UAC_VERSION_2 */
663 struct uac2_input_terminal_descriptor *d = p1;
664 term->type = le16_to_cpu(d->wTerminalType);
665 term->channels = d->bNrChannels;
666 term->chconfig = le32_to_cpu(d->bmChannelConfig);
667 term->name = d->iTerminal;
668
669 /* call recursively to get the clock selectors */
670 err = check_input_term(state, d->bCSourceID, term);
671 if (err < 0)
672 return err;
673 }
674 return 0;
675 case UAC_FEATURE_UNIT: {
676 /* the header is the same for v1 and v2 */
677 struct uac_feature_unit_descriptor *d = p1;
678 id = d->bSourceID;
679 break; /* continue to parse */
680 }
681 case UAC_MIXER_UNIT: {
682 struct uac_mixer_unit_descriptor *d = p1;
683 term->type = d->bDescriptorSubtype << 16; /* virtual type */
684 term->channels = uac_mixer_unit_bNrChannels(d);
685 term->chconfig = uac_mixer_unit_wChannelConfig(d, state->mixer->protocol);
686 term->name = uac_mixer_unit_iMixer(d);
687 return 0;
688 }
689 case UAC_SELECTOR_UNIT:
690 case UAC2_CLOCK_SELECTOR: {
691 struct uac_selector_unit_descriptor *d = p1;
692 /* call recursively to retrieve the channel info */
693 if (check_input_term(state, d->baSourceID[0], term) < 0)
694 return -ENODEV;
695 term->type = d->bDescriptorSubtype << 16; /* virtual type */
696 term->id = id;
697 term->name = uac_selector_unit_iSelector(d);
698 return 0;
699 }
700 case UAC1_PROCESSING_UNIT:
701 case UAC1_EXTENSION_UNIT: {
702 struct uac_processing_unit_descriptor *d = p1;
703 if (d->bNrInPins) {
704 id = d->baSourceID[0];
705 break; /* continue to parse */
706 }
707 term->type = d->bDescriptorSubtype << 16; /* virtual type */
708 term->channels = uac_processing_unit_bNrChannels(d);
709 term->chconfig = uac_processing_unit_wChannelConfig(d, state->mixer->protocol);
710 term->name = uac_processing_unit_iProcessing(d, state->mixer->protocol);
711 return 0;
712 }
713 case UAC2_CLOCK_SOURCE: {
714 struct uac_clock_source_descriptor *d = p1;
715 term->type = d->bDescriptorSubtype << 16; /* virtual type */
716 term->id = id;
717 term->name = d->iClockSource;
718 return 0;
719 }
720 default:
721 return -ENODEV;
722 }
723 }
724 return -ENODEV;
725 }
726
727
728 /*
729 * Feature Unit
730 */
731
732 /* feature unit control information */
733 struct usb_feature_control_info {
734 const char *name;
735 unsigned int type; /* control type (mute, volume, etc.) */
736 };
737
738 static struct usb_feature_control_info audio_feature_info[] = {
739 { "Mute", USB_MIXER_INV_BOOLEAN },
740 { "Volume", USB_MIXER_S16 },
741 { "Tone Control - Bass", USB_MIXER_S8 },
742 { "Tone Control - Mid", USB_MIXER_S8 },
743 { "Tone Control - Treble", USB_MIXER_S8 },
744 { "Graphic Equalizer", USB_MIXER_S8 }, /* FIXME: not implemeted yet */
745 { "Auto Gain Control", USB_MIXER_BOOLEAN },
746 { "Delay Control", USB_MIXER_U16 },
747 { "Bass Boost", USB_MIXER_BOOLEAN },
748 { "Loudness", USB_MIXER_BOOLEAN },
749 /* UAC2 specific */
750 { "Input Gain Control", USB_MIXER_U16 },
751 { "Input Gain Pad Control", USB_MIXER_BOOLEAN },
752 { "Phase Inverter Control", USB_MIXER_BOOLEAN },
753 };
754
755
756 /* private_free callback */
757 static void usb_mixer_elem_free(struct snd_kcontrol *kctl)
758 {
759 kfree(kctl->private_data);
760 kctl->private_data = NULL;
761 }
762
763
764 /*
765 * interface to ALSA control for feature/mixer units
766 */
767
768 /*
769 * retrieve the minimum and maximum values for the specified control
770 */
771 static int get_min_max(struct usb_mixer_elem_info *cval, int default_min)
772 {
773 /* for failsafe */
774 cval->min = default_min;
775 cval->max = cval->min + 1;
776 cval->res = 1;
777 cval->dBmin = cval->dBmax = 0;
778
779 if (cval->val_type == USB_MIXER_BOOLEAN ||
780 cval->val_type == USB_MIXER_INV_BOOLEAN) {
781 cval->initialized = 1;
782 } else {
783 int minchn = 0;
784 if (cval->cmask) {
785 int i;
786 for (i = 0; i < MAX_CHANNELS; i++)
787 if (cval->cmask & (1 << i)) {
788 minchn = i + 1;
789 break;
790 }
791 }
792 if (get_ctl_value(cval, UAC_GET_MAX, (cval->control << 8) | minchn, &cval->max) < 0 ||
793 get_ctl_value(cval, UAC_GET_MIN, (cval->control << 8) | minchn, &cval->min) < 0) {
794 snd_printd(KERN_ERR "%d:%d: cannot get min/max values for control %d (id %d)\n",
795 cval->id, snd_usb_ctrl_intf(cval->mixer->chip), cval->control, cval->id);
796 return -EINVAL;
797 }
798 if (get_ctl_value(cval, UAC_GET_RES, (cval->control << 8) | minchn, &cval->res) < 0) {
799 cval->res = 1;
800 } else {
801 int last_valid_res = cval->res;
802
803 while (cval->res > 1) {
804 if (snd_usb_mixer_set_ctl_value(cval, UAC_SET_RES,
805 (cval->control << 8) | minchn, cval->res / 2) < 0)
806 break;
807 cval->res /= 2;
808 }
809 if (get_ctl_value(cval, UAC_GET_RES, (cval->control << 8) | minchn, &cval->res) < 0)
810 cval->res = last_valid_res;
811 }
812 if (cval->res == 0)
813 cval->res = 1;
814
815 /* Additional checks for the proper resolution
816 *
817 * Some devices report smaller resolutions than actually
818 * reacting. They don't return errors but simply clip
819 * to the lower aligned value.
820 */
821 if (cval->min + cval->res < cval->max) {
822 int last_valid_res = cval->res;
823 int saved, test, check;
824 get_cur_mix_raw(cval, minchn, &saved);
825 for (;;) {
826 test = saved;
827 if (test < cval->max)
828 test += cval->res;
829 else
830 test -= cval->res;
831 if (test < cval->min || test > cval->max ||
832 set_cur_mix_value(cval, minchn, 0, test) ||
833 get_cur_mix_raw(cval, minchn, &check)) {
834 cval->res = last_valid_res;
835 break;
836 }
837 if (test == check)
838 break;
839 cval->res *= 2;
840 }
841 set_cur_mix_value(cval, minchn, 0, saved);
842 }
843
844 cval->initialized = 1;
845 }
846
847 /* USB descriptions contain the dB scale in 1/256 dB unit
848 * while ALSA TLV contains in 1/100 dB unit
849 */
850 cval->dBmin = (convert_signed_value(cval, cval->min) * 100) / 256;
851 cval->dBmax = (convert_signed_value(cval, cval->max) * 100) / 256;
852 if (cval->dBmin > cval->dBmax) {
853 /* something is wrong; assume it's either from/to 0dB */
854 if (cval->dBmin < 0)
855 cval->dBmax = 0;
856 else if (cval->dBmin > 0)
857 cval->dBmin = 0;
858 if (cval->dBmin > cval->dBmax) {
859 /* totally crap, return an error */
860 return -EINVAL;
861 }
862 }
863
864 return 0;
865 }
866
867
868 /* get a feature/mixer unit info */
869 static int mixer_ctl_feature_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
870 {
871 struct usb_mixer_elem_info *cval = kcontrol->private_data;
872
873 if (cval->val_type == USB_MIXER_BOOLEAN ||
874 cval->val_type == USB_MIXER_INV_BOOLEAN)
875 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
876 else
877 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
878 uinfo->count = cval->channels;
879 if (cval->val_type == USB_MIXER_BOOLEAN ||
880 cval->val_type == USB_MIXER_INV_BOOLEAN) {
881 uinfo->value.integer.min = 0;
882 uinfo->value.integer.max = 1;
883 } else {
884 if (! cval->initialized)
885 get_min_max(cval, 0);
886 uinfo->value.integer.min = 0;
887 uinfo->value.integer.max =
888 (cval->max - cval->min + cval->res - 1) / cval->res;
889 }
890 return 0;
891 }
892
893 /* get the current value from feature/mixer unit */
894 static int mixer_ctl_feature_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
895 {
896 struct usb_mixer_elem_info *cval = kcontrol->private_data;
897 int c, cnt, val, err;
898
899 ucontrol->value.integer.value[0] = cval->min;
900 if (cval->cmask) {
901 cnt = 0;
902 for (c = 0; c < MAX_CHANNELS; c++) {
903 if (!(cval->cmask & (1 << c)))
904 continue;
905 err = get_cur_mix_value(cval, c + 1, cnt, &val);
906 if (err < 0)
907 return cval->mixer->ignore_ctl_error ? 0 : err;
908 val = get_relative_value(cval, val);
909 ucontrol->value.integer.value[cnt] = val;
910 cnt++;
911 }
912 return 0;
913 } else {
914 /* master channel */
915 err = get_cur_mix_value(cval, 0, 0, &val);
916 if (err < 0)
917 return cval->mixer->ignore_ctl_error ? 0 : err;
918 val = get_relative_value(cval, val);
919 ucontrol->value.integer.value[0] = val;
920 }
921 return 0;
922 }
923
924 /* put the current value to feature/mixer unit */
925 static int mixer_ctl_feature_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
926 {
927 struct usb_mixer_elem_info *cval = kcontrol->private_data;
928 int c, cnt, val, oval, err;
929 int changed = 0;
930
931 if (cval->cmask) {
932 cnt = 0;
933 for (c = 0; c < MAX_CHANNELS; c++) {
934 if (!(cval->cmask & (1 << c)))
935 continue;
936 err = get_cur_mix_value(cval, c + 1, cnt, &oval);
937 if (err < 0)
938 return cval->mixer->ignore_ctl_error ? 0 : err;
939 val = ucontrol->value.integer.value[cnt];
940 val = get_abs_value(cval, val);
941 if (oval != val) {
942 set_cur_mix_value(cval, c + 1, cnt, val);
943 changed = 1;
944 }
945 cnt++;
946 }
947 } else {
948 /* master channel */
949 err = get_cur_mix_value(cval, 0, 0, &oval);
950 if (err < 0)
951 return cval->mixer->ignore_ctl_error ? 0 : err;
952 val = ucontrol->value.integer.value[0];
953 val = get_abs_value(cval, val);
954 if (val != oval) {
955 set_cur_mix_value(cval, 0, 0, val);
956 changed = 1;
957 }
958 }
959 return changed;
960 }
961
962 static struct snd_kcontrol_new usb_feature_unit_ctl = {
963 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
964 .name = "", /* will be filled later manually */
965 .info = mixer_ctl_feature_info,
966 .get = mixer_ctl_feature_get,
967 .put = mixer_ctl_feature_put,
968 };
969
970 /* the read-only variant */
971 static struct snd_kcontrol_new usb_feature_unit_ctl_ro = {
972 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
973 .name = "", /* will be filled later manually */
974 .info = mixer_ctl_feature_info,
975 .get = mixer_ctl_feature_get,
976 .put = NULL,
977 };
978
979 /* This symbol is exported in order to allow the mixer quirks to
980 * hook up to the standard feature unit control mechanism */
981 struct snd_kcontrol_new *snd_usb_feature_unit_ctl = &usb_feature_unit_ctl;
982
983 /*
984 * build a feature control
985 */
986
987 static size_t append_ctl_name(struct snd_kcontrol *kctl, const char *str)
988 {
989 return strlcat(kctl->id.name, str, sizeof(kctl->id.name));
990 }
991
992 static void build_feature_ctl(struct mixer_build *state, void *raw_desc,
993 unsigned int ctl_mask, int control,
994 struct usb_audio_term *iterm, int unitid,
995 int readonly_mask)
996 {
997 struct uac_feature_unit_descriptor *desc = raw_desc;
998 unsigned int len = 0;
999 int mapped_name = 0;
1000 int nameid = uac_feature_unit_iFeature(desc);
1001 struct snd_kcontrol *kctl;
1002 struct usb_mixer_elem_info *cval;
1003 const struct usbmix_name_map *map;
1004 unsigned int range;
1005
1006 control++; /* change from zero-based to 1-based value */
1007
1008 if (control == UAC_FU_GRAPHIC_EQUALIZER) {
1009 /* FIXME: not supported yet */
1010 return;
1011 }
1012
1013 map = find_map(state, unitid, control);
1014 if (check_ignored_ctl(map))
1015 return;
1016
1017 cval = kzalloc(sizeof(*cval), GFP_KERNEL);
1018 if (! cval) {
1019 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
1020 return;
1021 }
1022 cval->mixer = state->mixer;
1023 cval->id = unitid;
1024 cval->control = control;
1025 cval->cmask = ctl_mask;
1026 cval->val_type = audio_feature_info[control-1].type;
1027 if (ctl_mask == 0) {
1028 cval->channels = 1; /* master channel */
1029 cval->master_readonly = readonly_mask;
1030 } else {
1031 int i, c = 0;
1032 for (i = 0; i < 16; i++)
1033 if (ctl_mask & (1 << i))
1034 c++;
1035 cval->channels = c;
1036 cval->ch_readonly = readonly_mask;
1037 }
1038
1039 /* get min/max values */
1040 get_min_max(cval, 0);
1041
1042 /* if all channels in the mask are marked read-only, make the control
1043 * read-only. set_cur_mix_value() will check the mask again and won't
1044 * issue write commands to read-only channels. */
1045 if (cval->channels == readonly_mask)
1046 kctl = snd_ctl_new1(&usb_feature_unit_ctl_ro, cval);
1047 else
1048 kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval);
1049
1050 if (! kctl) {
1051 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
1052 kfree(cval);
1053 return;
1054 }
1055 kctl->private_free = usb_mixer_elem_free;
1056
1057 len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name));
1058 mapped_name = len != 0;
1059 if (! len && nameid)
1060 len = snd_usb_copy_string_desc(state, nameid,
1061 kctl->id.name, sizeof(kctl->id.name));
1062
1063 switch (control) {
1064 case UAC_FU_MUTE:
1065 case UAC_FU_VOLUME:
1066 /* determine the control name. the rule is:
1067 * - if a name id is given in descriptor, use it.
1068 * - if the connected input can be determined, then use the name
1069 * of terminal type.
1070 * - if the connected output can be determined, use it.
1071 * - otherwise, anonymous name.
1072 */
1073 if (! len) {
1074 len = get_term_name(state, iterm, kctl->id.name, sizeof(kctl->id.name), 1);
1075 if (! len)
1076 len = get_term_name(state, &state->oterm, kctl->id.name, sizeof(kctl->id.name), 1);
1077 if (! len)
1078 len = snprintf(kctl->id.name, sizeof(kctl->id.name),
1079 "Feature %d", unitid);
1080 }
1081 /* determine the stream direction:
1082 * if the connected output is USB stream, then it's likely a
1083 * capture stream. otherwise it should be playback (hopefully :)
1084 */
1085 if (! mapped_name && ! (state->oterm.type >> 16)) {
1086 if ((state->oterm.type & 0xff00) == 0x0100) {
1087 len = append_ctl_name(kctl, " Capture");
1088 } else {
1089 len = append_ctl_name(kctl, " Playback");
1090 }
1091 }
1092 append_ctl_name(kctl, control == UAC_FU_MUTE ?
1093 " Switch" : " Volume");
1094 if (control == UAC_FU_VOLUME) {
1095 check_mapped_dB(map, cval);
1096 if (cval->dBmin < cval->dBmax || !cval->initialized) {
1097 kctl->tlv.c = mixer_vol_tlv;
1098 kctl->vd[0].access |=
1099 SNDRV_CTL_ELEM_ACCESS_TLV_READ |
1100 SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK;
1101 }
1102 }
1103 break;
1104
1105 default:
1106 if (! len)
1107 strlcpy(kctl->id.name, audio_feature_info[control-1].name,
1108 sizeof(kctl->id.name));
1109 break;
1110 }
1111
1112 /* volume control quirks */
1113 switch (state->chip->usb_id) {
1114 case USB_ID(0x0471, 0x0101):
1115 case USB_ID(0x0471, 0x0104):
1116 case USB_ID(0x0471, 0x0105):
1117 case USB_ID(0x0672, 0x1041):
1118 /* quirk for UDA1321/N101.
1119 * note that detection between firmware 2.1.1.7 (N101)
1120 * and later 2.1.1.21 is not very clear from datasheets.
1121 * I hope that the min value is -15360 for newer firmware --jk
1122 */
1123 if (!strcmp(kctl->id.name, "PCM Playback Volume") &&
1124 cval->min == -15616) {
1125 snd_printk(KERN_INFO
1126 "set volume quirk for UDA1321/N101 chip\n");
1127 cval->max = -256;
1128 }
1129 break;
1130
1131 case USB_ID(0x046d, 0x09a4):
1132 if (!strcmp(kctl->id.name, "Mic Capture Volume")) {
1133 snd_printk(KERN_INFO
1134 "set volume quirk for QuickCam E3500\n");
1135 cval->min = 6080;
1136 cval->max = 8768;
1137 cval->res = 192;
1138 }
1139 break;
1140
1141 case USB_ID(0x046d, 0x0808):
1142 case USB_ID(0x046d, 0x0809):
1143 case USB_ID(0x046d, 0x0991):
1144 /* Most audio usb devices lie about volume resolution.
1145 * Most Logitech webcams have res = 384.
1146 * Proboly there is some logitech magic behind this number --fishor
1147 */
1148 if (!strcmp(kctl->id.name, "Mic Capture Volume")) {
1149 snd_printk(KERN_INFO
1150 "set resolution quirk: cval->res = 384\n");
1151 cval->res = 384;
1152 }
1153 break;
1154
1155 }
1156
1157 range = (cval->max - cval->min) / cval->res;
1158 /* Are there devices with volume range more than 255? I use a bit more
1159 * to be sure. 384 is a resolution magic number found on Logitech
1160 * devices. It will definitively catch all buggy Logitech devices.
1161 */
1162 if (range > 384) {
1163 snd_printk(KERN_WARNING "usb_audio: Warning! Unlikely big "
1164 "volume range (=%u), cval->res is probably wrong.",
1165 range);
1166 snd_printk(KERN_WARNING "usb_audio: [%d] FU [%s] ch = %d, "
1167 "val = %d/%d/%d", cval->id,
1168 kctl->id.name, cval->channels,
1169 cval->min, cval->max, cval->res);
1170 }
1171
1172 snd_printdd(KERN_INFO "[%d] FU [%s] ch = %d, val = %d/%d/%d\n",
1173 cval->id, kctl->id.name, cval->channels, cval->min, cval->max, cval->res);
1174 snd_usb_mixer_add_control(state->mixer, kctl);
1175 }
1176
1177
1178
1179 /*
1180 * parse a feature unit
1181 *
1182 * most of controls are defined here.
1183 */
1184 static int parse_audio_feature_unit(struct mixer_build *state, int unitid, void *_ftr)
1185 {
1186 int channels, i, j;
1187 struct usb_audio_term iterm;
1188 unsigned int master_bits, first_ch_bits;
1189 int err, csize;
1190 struct uac_feature_unit_descriptor *hdr = _ftr;
1191 __u8 *bmaControls;
1192
1193 if (state->mixer->protocol == UAC_VERSION_1) {
1194 csize = hdr->bControlSize;
1195 if (!csize) {
1196 snd_printdd(KERN_ERR "usbaudio: unit %u: "
1197 "invalid bControlSize == 0\n", unitid);
1198 return -EINVAL;
1199 }
1200 channels = (hdr->bLength - 7) / csize - 1;
1201 bmaControls = hdr->bmaControls;
1202 } else {
1203 struct uac2_feature_unit_descriptor *ftr = _ftr;
1204 csize = 4;
1205 channels = (hdr->bLength - 6) / 4 - 1;
1206 bmaControls = ftr->bmaControls;
1207 }
1208
1209 if (hdr->bLength < 7 || !csize || hdr->bLength < 7 + csize) {
1210 snd_printk(KERN_ERR "usbaudio: unit %u: invalid UAC_FEATURE_UNIT descriptor\n", unitid);
1211 return -EINVAL;
1212 }
1213
1214 /* parse the source unit */
1215 if ((err = parse_audio_unit(state, hdr->bSourceID)) < 0)
1216 return err;
1217
1218 /* determine the input source type and name */
1219 if (check_input_term(state, hdr->bSourceID, &iterm) < 0)
1220 return -EINVAL;
1221
1222 master_bits = snd_usb_combine_bytes(bmaControls, csize);
1223 /* master configuration quirks */
1224 switch (state->chip->usb_id) {
1225 case USB_ID(0x08bb, 0x2702):
1226 snd_printk(KERN_INFO
1227 "usbmixer: master volume quirk for PCM2702 chip\n");
1228 /* disable non-functional volume control */
1229 master_bits &= ~UAC_CONTROL_BIT(UAC_FU_VOLUME);
1230 break;
1231 }
1232 if (channels > 0)
1233 first_ch_bits = snd_usb_combine_bytes(bmaControls + csize, csize);
1234 else
1235 first_ch_bits = 0;
1236
1237 if (state->mixer->protocol == UAC_VERSION_1) {
1238 /* check all control types */
1239 for (i = 0; i < 10; i++) {
1240 unsigned int ch_bits = 0;
1241 for (j = 0; j < channels; j++) {
1242 unsigned int mask = snd_usb_combine_bytes(bmaControls + csize * (j+1), csize);
1243 if (mask & (1 << i))
1244 ch_bits |= (1 << j);
1245 }
1246 /* audio class v1 controls are never read-only */
1247 if (ch_bits & 1) /* the first channel must be set (for ease of programming) */
1248 build_feature_ctl(state, _ftr, ch_bits, i, &iterm, unitid, 0);
1249 if (master_bits & (1 << i))
1250 build_feature_ctl(state, _ftr, 0, i, &iterm, unitid, 0);
1251 }
1252 } else { /* UAC_VERSION_2 */
1253 for (i = 0; i < 30/2; i++) {
1254 unsigned int ch_bits = 0;
1255 unsigned int ch_read_only = 0;
1256
1257 for (j = 0; j < channels; j++) {
1258 unsigned int mask = snd_usb_combine_bytes(bmaControls + csize * (j+1), csize);
1259 if (uac2_control_is_readable(mask, i)) {
1260 ch_bits |= (1 << j);
1261 if (!uac2_control_is_writeable(mask, i))
1262 ch_read_only |= (1 << j);
1263 }
1264 }
1265
1266 /* NOTE: build_feature_ctl() will mark the control read-only if all channels
1267 * are marked read-only in the descriptors. Otherwise, the control will be
1268 * reported as writeable, but the driver will not actually issue a write
1269 * command for read-only channels */
1270 if (ch_bits & 1) /* the first channel must be set (for ease of programming) */
1271 build_feature_ctl(state, _ftr, ch_bits, i, &iterm, unitid, ch_read_only);
1272 if (uac2_control_is_readable(master_bits, i))
1273 build_feature_ctl(state, _ftr, 0, i, &iterm, unitid,
1274 !uac2_control_is_writeable(master_bits, i));
1275 }
1276 }
1277
1278 return 0;
1279 }
1280
1281
1282 /*
1283 * Mixer Unit
1284 */
1285
1286 /*
1287 * build a mixer unit control
1288 *
1289 * the callbacks are identical with feature unit.
1290 * input channel number (zero based) is given in control field instead.
1291 */
1292
1293 static void build_mixer_unit_ctl(struct mixer_build *state,
1294 struct uac_mixer_unit_descriptor *desc,
1295 int in_pin, int in_ch, int unitid,
1296 struct usb_audio_term *iterm)
1297 {
1298 struct usb_mixer_elem_info *cval;
1299 unsigned int num_outs = uac_mixer_unit_bNrChannels(desc);
1300 unsigned int i, len;
1301 struct snd_kcontrol *kctl;
1302 const struct usbmix_name_map *map;
1303
1304 map = find_map(state, unitid, 0);
1305 if (check_ignored_ctl(map))
1306 return;
1307
1308 cval = kzalloc(sizeof(*cval), GFP_KERNEL);
1309 if (! cval)
1310 return;
1311
1312 cval->mixer = state->mixer;
1313 cval->id = unitid;
1314 cval->control = in_ch + 1; /* based on 1 */
1315 cval->val_type = USB_MIXER_S16;
1316 for (i = 0; i < num_outs; i++) {
1317 if (check_matrix_bitmap(uac_mixer_unit_bmControls(desc, state->mixer->protocol), in_ch, i, num_outs)) {
1318 cval->cmask |= (1 << i);
1319 cval->channels++;
1320 }
1321 }
1322
1323 /* get min/max values */
1324 get_min_max(cval, 0);
1325
1326 kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval);
1327 if (! kctl) {
1328 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
1329 kfree(cval);
1330 return;
1331 }
1332 kctl->private_free = usb_mixer_elem_free;
1333
1334 len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name));
1335 if (! len)
1336 len = get_term_name(state, iterm, kctl->id.name, sizeof(kctl->id.name), 0);
1337 if (! len)
1338 len = sprintf(kctl->id.name, "Mixer Source %d", in_ch + 1);
1339 append_ctl_name(kctl, " Volume");
1340
1341 snd_printdd(KERN_INFO "[%d] MU [%s] ch = %d, val = %d/%d\n",
1342 cval->id, kctl->id.name, cval->channels, cval->min, cval->max);
1343 snd_usb_mixer_add_control(state->mixer, kctl);
1344 }
1345
1346
1347 /*
1348 * parse a mixer unit
1349 */
1350 static int parse_audio_mixer_unit(struct mixer_build *state, int unitid, void *raw_desc)
1351 {
1352 struct uac_mixer_unit_descriptor *desc = raw_desc;
1353 struct usb_audio_term iterm;
1354 int input_pins, num_ins, num_outs;
1355 int pin, ich, err;
1356
1357 if (desc->bLength < 11 || ! (input_pins = desc->bNrInPins) || ! (num_outs = uac_mixer_unit_bNrChannels(desc))) {
1358 snd_printk(KERN_ERR "invalid MIXER UNIT descriptor %d\n", unitid);
1359 return -EINVAL;
1360 }
1361 /* no bmControls field (e.g. Maya44) -> ignore */
1362 if (desc->bLength <= 10 + input_pins) {
1363 snd_printdd(KERN_INFO "MU %d has no bmControls field\n", unitid);
1364 return 0;
1365 }
1366
1367 num_ins = 0;
1368 ich = 0;
1369 for (pin = 0; pin < input_pins; pin++) {
1370 err = parse_audio_unit(state, desc->baSourceID[pin]);
1371 if (err < 0)
1372 return err;
1373 err = check_input_term(state, desc->baSourceID[pin], &iterm);
1374 if (err < 0)
1375 return err;
1376 num_ins += iterm.channels;
1377 for (; ich < num_ins; ++ich) {
1378 int och, ich_has_controls = 0;
1379
1380 for (och = 0; och < num_outs; ++och) {
1381 if (check_matrix_bitmap(uac_mixer_unit_bmControls(desc, state->mixer->protocol),
1382 ich, och, num_outs)) {
1383 ich_has_controls = 1;
1384 break;
1385 }
1386 }
1387 if (ich_has_controls)
1388 build_mixer_unit_ctl(state, desc, pin, ich,
1389 unitid, &iterm);
1390 }
1391 }
1392 return 0;
1393 }
1394
1395
1396 /*
1397 * Processing Unit / Extension Unit
1398 */
1399
1400 /* get callback for processing/extension unit */
1401 static int mixer_ctl_procunit_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
1402 {
1403 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1404 int err, val;
1405
1406 err = get_cur_ctl_value(cval, cval->control << 8, &val);
1407 if (err < 0 && cval->mixer->ignore_ctl_error) {
1408 ucontrol->value.integer.value[0] = cval->min;
1409 return 0;
1410 }
1411 if (err < 0)
1412 return err;
1413 val = get_relative_value(cval, val);
1414 ucontrol->value.integer.value[0] = val;
1415 return 0;
1416 }
1417
1418 /* put callback for processing/extension unit */
1419 static int mixer_ctl_procunit_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
1420 {
1421 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1422 int val, oval, err;
1423
1424 err = get_cur_ctl_value(cval, cval->control << 8, &oval);
1425 if (err < 0) {
1426 if (cval->mixer->ignore_ctl_error)
1427 return 0;
1428 return err;
1429 }
1430 val = ucontrol->value.integer.value[0];
1431 val = get_abs_value(cval, val);
1432 if (val != oval) {
1433 set_cur_ctl_value(cval, cval->control << 8, val);
1434 return 1;
1435 }
1436 return 0;
1437 }
1438
1439 /* alsa control interface for processing/extension unit */
1440 static struct snd_kcontrol_new mixer_procunit_ctl = {
1441 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1442 .name = "", /* will be filled later */
1443 .info = mixer_ctl_feature_info,
1444 .get = mixer_ctl_procunit_get,
1445 .put = mixer_ctl_procunit_put,
1446 };
1447
1448
1449 /*
1450 * predefined data for processing units
1451 */
1452 struct procunit_value_info {
1453 int control;
1454 char *suffix;
1455 int val_type;
1456 int min_value;
1457 };
1458
1459 struct procunit_info {
1460 int type;
1461 char *name;
1462 struct procunit_value_info *values;
1463 };
1464
1465 static struct procunit_value_info updown_proc_info[] = {
1466 { UAC_UD_ENABLE, "Switch", USB_MIXER_BOOLEAN },
1467 { UAC_UD_MODE_SELECT, "Mode Select", USB_MIXER_U8, 1 },
1468 { 0 }
1469 };
1470 static struct procunit_value_info prologic_proc_info[] = {
1471 { UAC_DP_ENABLE, "Switch", USB_MIXER_BOOLEAN },
1472 { UAC_DP_MODE_SELECT, "Mode Select", USB_MIXER_U8, 1 },
1473 { 0 }
1474 };
1475 static struct procunit_value_info threed_enh_proc_info[] = {
1476 { UAC_3D_ENABLE, "Switch", USB_MIXER_BOOLEAN },
1477 { UAC_3D_SPACE, "Spaciousness", USB_MIXER_U8 },
1478 { 0 }
1479 };
1480 static struct procunit_value_info reverb_proc_info[] = {
1481 { UAC_REVERB_ENABLE, "Switch", USB_MIXER_BOOLEAN },
1482 { UAC_REVERB_LEVEL, "Level", USB_MIXER_U8 },
1483 { UAC_REVERB_TIME, "Time", USB_MIXER_U16 },
1484 { UAC_REVERB_FEEDBACK, "Feedback", USB_MIXER_U8 },
1485 { 0 }
1486 };
1487 static struct procunit_value_info chorus_proc_info[] = {
1488 { UAC_CHORUS_ENABLE, "Switch", USB_MIXER_BOOLEAN },
1489 { UAC_CHORUS_LEVEL, "Level", USB_MIXER_U8 },
1490 { UAC_CHORUS_RATE, "Rate", USB_MIXER_U16 },
1491 { UAC_CHORUS_DEPTH, "Depth", USB_MIXER_U16 },
1492 { 0 }
1493 };
1494 static struct procunit_value_info dcr_proc_info[] = {
1495 { UAC_DCR_ENABLE, "Switch", USB_MIXER_BOOLEAN },
1496 { UAC_DCR_RATE, "Ratio", USB_MIXER_U16 },
1497 { UAC_DCR_MAXAMPL, "Max Amp", USB_MIXER_S16 },
1498 { UAC_DCR_THRESHOLD, "Threshold", USB_MIXER_S16 },
1499 { UAC_DCR_ATTACK_TIME, "Attack Time", USB_MIXER_U16 },
1500 { UAC_DCR_RELEASE_TIME, "Release Time", USB_MIXER_U16 },
1501 { 0 }
1502 };
1503
1504 static struct procunit_info procunits[] = {
1505 { UAC_PROCESS_UP_DOWNMIX, "Up Down", updown_proc_info },
1506 { UAC_PROCESS_DOLBY_PROLOGIC, "Dolby Prologic", prologic_proc_info },
1507 { UAC_PROCESS_STEREO_EXTENDER, "3D Stereo Extender", threed_enh_proc_info },
1508 { UAC_PROCESS_REVERB, "Reverb", reverb_proc_info },
1509 { UAC_PROCESS_CHORUS, "Chorus", chorus_proc_info },
1510 { UAC_PROCESS_DYN_RANGE_COMP, "DCR", dcr_proc_info },
1511 { 0 },
1512 };
1513 /*
1514 * predefined data for extension units
1515 */
1516 static struct procunit_value_info clock_rate_xu_info[] = {
1517 { USB_XU_CLOCK_RATE_SELECTOR, "Selector", USB_MIXER_U8, 0 },
1518 { 0 }
1519 };
1520 static struct procunit_value_info clock_source_xu_info[] = {
1521 { USB_XU_CLOCK_SOURCE_SELECTOR, "External", USB_MIXER_BOOLEAN },
1522 { 0 }
1523 };
1524 static struct procunit_value_info spdif_format_xu_info[] = {
1525 { USB_XU_DIGITAL_FORMAT_SELECTOR, "SPDIF/AC3", USB_MIXER_BOOLEAN },
1526 { 0 }
1527 };
1528 static struct procunit_value_info soft_limit_xu_info[] = {
1529 { USB_XU_SOFT_LIMIT_SELECTOR, " ", USB_MIXER_BOOLEAN },
1530 { 0 }
1531 };
1532 static struct procunit_info extunits[] = {
1533 { USB_XU_CLOCK_RATE, "Clock rate", clock_rate_xu_info },
1534 { USB_XU_CLOCK_SOURCE, "DigitalIn CLK source", clock_source_xu_info },
1535 { USB_XU_DIGITAL_IO_STATUS, "DigitalOut format:", spdif_format_xu_info },
1536 { USB_XU_DEVICE_OPTIONS, "AnalogueIn Soft Limit", soft_limit_xu_info },
1537 { 0 }
1538 };
1539 /*
1540 * build a processing/extension unit
1541 */
1542 static int build_audio_procunit(struct mixer_build *state, int unitid, void *raw_desc, struct procunit_info *list, char *name)
1543 {
1544 struct uac_processing_unit_descriptor *desc = raw_desc;
1545 int num_ins = desc->bNrInPins;
1546 struct usb_mixer_elem_info *cval;
1547 struct snd_kcontrol *kctl;
1548 int i, err, nameid, type, len;
1549 struct procunit_info *info;
1550 struct procunit_value_info *valinfo;
1551 const struct usbmix_name_map *map;
1552 static struct procunit_value_info default_value_info[] = {
1553 { 0x01, "Switch", USB_MIXER_BOOLEAN },
1554 { 0 }
1555 };
1556 static struct procunit_info default_info = {
1557 0, NULL, default_value_info
1558 };
1559
1560 if (desc->bLength < 13 || desc->bLength < 13 + num_ins ||
1561 desc->bLength < num_ins + uac_processing_unit_bControlSize(desc, state->mixer->protocol)) {
1562 snd_printk(KERN_ERR "invalid %s descriptor (id %d)\n", name, unitid);
1563 return -EINVAL;
1564 }
1565
1566 for (i = 0; i < num_ins; i++) {
1567 if ((err = parse_audio_unit(state, desc->baSourceID[i])) < 0)
1568 return err;
1569 }
1570
1571 type = le16_to_cpu(desc->wProcessType);
1572 for (info = list; info && info->type; info++)
1573 if (info->type == type)
1574 break;
1575 if (! info || ! info->type)
1576 info = &default_info;
1577
1578 for (valinfo = info->values; valinfo->control; valinfo++) {
1579 __u8 *controls = uac_processing_unit_bmControls(desc, state->mixer->protocol);
1580
1581 if (! (controls[valinfo->control / 8] & (1 << ((valinfo->control % 8) - 1))))
1582 continue;
1583 map = find_map(state, unitid, valinfo->control);
1584 if (check_ignored_ctl(map))
1585 continue;
1586 cval = kzalloc(sizeof(*cval), GFP_KERNEL);
1587 if (! cval) {
1588 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
1589 return -ENOMEM;
1590 }
1591 cval->mixer = state->mixer;
1592 cval->id = unitid;
1593 cval->control = valinfo->control;
1594 cval->val_type = valinfo->val_type;
1595 cval->channels = 1;
1596
1597 /* get min/max values */
1598 if (type == UAC_PROCESS_UP_DOWNMIX && cval->control == UAC_UD_MODE_SELECT) {
1599 __u8 *control_spec = uac_processing_unit_specific(desc, state->mixer->protocol);
1600 /* FIXME: hard-coded */
1601 cval->min = 1;
1602 cval->max = control_spec[0];
1603 cval->res = 1;
1604 cval->initialized = 1;
1605 } else {
1606 if (type == USB_XU_CLOCK_RATE) {
1607 /* E-Mu USB 0404/0202/TrackerPre/0204
1608 * samplerate control quirk
1609 */
1610 cval->min = 0;
1611 cval->max = 5;
1612 cval->res = 1;
1613 cval->initialized = 1;
1614 } else
1615 get_min_max(cval, valinfo->min_value);
1616 }
1617
1618 kctl = snd_ctl_new1(&mixer_procunit_ctl, cval);
1619 if (! kctl) {
1620 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
1621 kfree(cval);
1622 return -ENOMEM;
1623 }
1624 kctl->private_free = usb_mixer_elem_free;
1625
1626 if (check_mapped_name(map, kctl->id.name,
1627 sizeof(kctl->id.name)))
1628 /* nothing */ ;
1629 else if (info->name)
1630 strlcpy(kctl->id.name, info->name, sizeof(kctl->id.name));
1631 else {
1632 nameid = uac_processing_unit_iProcessing(desc, state->mixer->protocol);
1633 len = 0;
1634 if (nameid)
1635 len = snd_usb_copy_string_desc(state, nameid, kctl->id.name, sizeof(kctl->id.name));
1636 if (! len)
1637 strlcpy(kctl->id.name, name, sizeof(kctl->id.name));
1638 }
1639 append_ctl_name(kctl, " ");
1640 append_ctl_name(kctl, valinfo->suffix);
1641
1642 snd_printdd(KERN_INFO "[%d] PU [%s] ch = %d, val = %d/%d\n",
1643 cval->id, kctl->id.name, cval->channels, cval->min, cval->max);
1644 if ((err = snd_usb_mixer_add_control(state->mixer, kctl)) < 0)
1645 return err;
1646 }
1647 return 0;
1648 }
1649
1650
1651 static int parse_audio_processing_unit(struct mixer_build *state, int unitid, void *raw_desc)
1652 {
1653 return build_audio_procunit(state, unitid, raw_desc, procunits, "Processing Unit");
1654 }
1655
1656 static int parse_audio_extension_unit(struct mixer_build *state, int unitid, void *raw_desc)
1657 {
1658 /* Note that we parse extension units with processing unit descriptors.
1659 * That's ok as the layout is the same */
1660 return build_audio_procunit(state, unitid, raw_desc, extunits, "Extension Unit");
1661 }
1662
1663
1664 /*
1665 * Selector Unit
1666 */
1667
1668 /* info callback for selector unit
1669 * use an enumerator type for routing
1670 */
1671 static int mixer_ctl_selector_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
1672 {
1673 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1674 const char **itemlist = (const char **)kcontrol->private_value;
1675
1676 if (snd_BUG_ON(!itemlist))
1677 return -EINVAL;
1678 return snd_ctl_enum_info(uinfo, 1, cval->max, itemlist);
1679 }
1680
1681 /* get callback for selector unit */
1682 static int mixer_ctl_selector_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
1683 {
1684 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1685 int val, err;
1686
1687 err = get_cur_ctl_value(cval, cval->control << 8, &val);
1688 if (err < 0) {
1689 if (cval->mixer->ignore_ctl_error) {
1690 ucontrol->value.enumerated.item[0] = 0;
1691 return 0;
1692 }
1693 return err;
1694 }
1695 val = get_relative_value(cval, val);
1696 ucontrol->value.enumerated.item[0] = val;
1697 return 0;
1698 }
1699
1700 /* put callback for selector unit */
1701 static int mixer_ctl_selector_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
1702 {
1703 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1704 int val, oval, err;
1705
1706 err = get_cur_ctl_value(cval, cval->control << 8, &oval);
1707 if (err < 0) {
1708 if (cval->mixer->ignore_ctl_error)
1709 return 0;
1710 return err;
1711 }
1712 val = ucontrol->value.enumerated.item[0];
1713 val = get_abs_value(cval, val);
1714 if (val != oval) {
1715 set_cur_ctl_value(cval, cval->control << 8, val);
1716 return 1;
1717 }
1718 return 0;
1719 }
1720
1721 /* alsa control interface for selector unit */
1722 static struct snd_kcontrol_new mixer_selectunit_ctl = {
1723 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1724 .name = "", /* will be filled later */
1725 .info = mixer_ctl_selector_info,
1726 .get = mixer_ctl_selector_get,
1727 .put = mixer_ctl_selector_put,
1728 };
1729
1730
1731 /* private free callback.
1732 * free both private_data and private_value
1733 */
1734 static void usb_mixer_selector_elem_free(struct snd_kcontrol *kctl)
1735 {
1736 int i, num_ins = 0;
1737
1738 if (kctl->private_data) {
1739 struct usb_mixer_elem_info *cval = kctl->private_data;
1740 num_ins = cval->max;
1741 kfree(cval);
1742 kctl->private_data = NULL;
1743 }
1744 if (kctl->private_value) {
1745 char **itemlist = (char **)kctl->private_value;
1746 for (i = 0; i < num_ins; i++)
1747 kfree(itemlist[i]);
1748 kfree(itemlist);
1749 kctl->private_value = 0;
1750 }
1751 }
1752
1753 /*
1754 * parse a selector unit
1755 */
1756 static int parse_audio_selector_unit(struct mixer_build *state, int unitid, void *raw_desc)
1757 {
1758 struct uac_selector_unit_descriptor *desc = raw_desc;
1759 unsigned int i, nameid, len;
1760 int err;
1761 struct usb_mixer_elem_info *cval;
1762 struct snd_kcontrol *kctl;
1763 const struct usbmix_name_map *map;
1764 char **namelist;
1765
1766 if (!desc->bNrInPins || desc->bLength < 5 + desc->bNrInPins) {
1767 snd_printk(KERN_ERR "invalid SELECTOR UNIT descriptor %d\n", unitid);
1768 return -EINVAL;
1769 }
1770
1771 for (i = 0; i < desc->bNrInPins; i++) {
1772 if ((err = parse_audio_unit(state, desc->baSourceID[i])) < 0)
1773 return err;
1774 }
1775
1776 if (desc->bNrInPins == 1) /* only one ? nonsense! */
1777 return 0;
1778
1779 map = find_map(state, unitid, 0);
1780 if (check_ignored_ctl(map))
1781 return 0;
1782
1783 cval = kzalloc(sizeof(*cval), GFP_KERNEL);
1784 if (! cval) {
1785 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
1786 return -ENOMEM;
1787 }
1788 cval->mixer = state->mixer;
1789 cval->id = unitid;
1790 cval->val_type = USB_MIXER_U8;
1791 cval->channels = 1;
1792 cval->min = 1;
1793 cval->max = desc->bNrInPins;
1794 cval->res = 1;
1795 cval->initialized = 1;
1796
1797 if (desc->bDescriptorSubtype == UAC2_CLOCK_SELECTOR)
1798 cval->control = UAC2_CX_CLOCK_SELECTOR;
1799 else
1800 cval->control = 0;
1801
1802 namelist = kmalloc(sizeof(char *) * desc->bNrInPins, GFP_KERNEL);
1803 if (! namelist) {
1804 snd_printk(KERN_ERR "cannot malloc\n");
1805 kfree(cval);
1806 return -ENOMEM;
1807 }
1808 #define MAX_ITEM_NAME_LEN 64
1809 for (i = 0; i < desc->bNrInPins; i++) {
1810 struct usb_audio_term iterm;
1811 len = 0;
1812 namelist[i] = kmalloc(MAX_ITEM_NAME_LEN, GFP_KERNEL);
1813 if (! namelist[i]) {
1814 snd_printk(KERN_ERR "cannot malloc\n");
1815 while (i--)
1816 kfree(namelist[i]);
1817 kfree(namelist);
1818 kfree(cval);
1819 return -ENOMEM;
1820 }
1821 len = check_mapped_selector_name(state, unitid, i, namelist[i],
1822 MAX_ITEM_NAME_LEN);
1823 if (! len && check_input_term(state, desc->baSourceID[i], &iterm) >= 0)
1824 len = get_term_name(state, &iterm, namelist[i], MAX_ITEM_NAME_LEN, 0);
1825 if (! len)
1826 sprintf(namelist[i], "Input %d", i);
1827 }
1828
1829 kctl = snd_ctl_new1(&mixer_selectunit_ctl, cval);
1830 if (! kctl) {
1831 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
1832 kfree(namelist);
1833 kfree(cval);
1834 return -ENOMEM;
1835 }
1836 kctl->private_value = (unsigned long)namelist;
1837 kctl->private_free = usb_mixer_selector_elem_free;
1838
1839 nameid = uac_selector_unit_iSelector(desc);
1840 len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name));
1841 if (len)
1842 ;
1843 else if (nameid)
1844 snd_usb_copy_string_desc(state, nameid, kctl->id.name, sizeof(kctl->id.name));
1845 else {
1846 len = get_term_name(state, &state->oterm,
1847 kctl->id.name, sizeof(kctl->id.name), 0);
1848 if (! len)
1849 strlcpy(kctl->id.name, "USB", sizeof(kctl->id.name));
1850
1851 if (desc->bDescriptorSubtype == UAC2_CLOCK_SELECTOR)
1852 append_ctl_name(kctl, " Clock Source");
1853 else if ((state->oterm.type & 0xff00) == 0x0100)
1854 append_ctl_name(kctl, " Capture Source");
1855 else
1856 append_ctl_name(kctl, " Playback Source");
1857 }
1858
1859 snd_printdd(KERN_INFO "[%d] SU [%s] items = %d\n",
1860 cval->id, kctl->id.name, desc->bNrInPins);
1861 if ((err = snd_usb_mixer_add_control(state->mixer, kctl)) < 0)
1862 return err;
1863
1864 return 0;
1865 }
1866
1867
1868 /*
1869 * parse an audio unit recursively
1870 */
1871
1872 static int parse_audio_unit(struct mixer_build *state, int unitid)
1873 {
1874 unsigned char *p1;
1875
1876 if (test_and_set_bit(unitid, state->unitbitmap))
1877 return 0; /* the unit already visited */
1878
1879 p1 = find_audio_control_unit(state, unitid);
1880 if (!p1) {
1881 snd_printk(KERN_ERR "usbaudio: unit %d not found!\n", unitid);
1882 return -EINVAL;
1883 }
1884
1885 switch (p1[2]) {
1886 case UAC_INPUT_TERMINAL:
1887 case UAC2_CLOCK_SOURCE:
1888 return 0; /* NOP */
1889 case UAC_MIXER_UNIT:
1890 return parse_audio_mixer_unit(state, unitid, p1);
1891 case UAC_SELECTOR_UNIT:
1892 case UAC2_CLOCK_SELECTOR:
1893 return parse_audio_selector_unit(state, unitid, p1);
1894 case UAC_FEATURE_UNIT:
1895 return parse_audio_feature_unit(state, unitid, p1);
1896 case UAC1_PROCESSING_UNIT:
1897 /* UAC2_EFFECT_UNIT has the same value */
1898 if (state->mixer->protocol == UAC_VERSION_1)
1899 return parse_audio_processing_unit(state, unitid, p1);
1900 else
1901 return 0; /* FIXME - effect units not implemented yet */
1902 case UAC1_EXTENSION_UNIT:
1903 /* UAC2_PROCESSING_UNIT_V2 has the same value */
1904 if (state->mixer->protocol == UAC_VERSION_1)
1905 return parse_audio_extension_unit(state, unitid, p1);
1906 else /* UAC_VERSION_2 */
1907 return parse_audio_processing_unit(state, unitid, p1);
1908 default:
1909 snd_printk(KERN_ERR "usbaudio: unit %u: unexpected type 0x%02x\n", unitid, p1[2]);
1910 return -EINVAL;
1911 }
1912 }
1913
1914 static void snd_usb_mixer_free(struct usb_mixer_interface *mixer)
1915 {
1916 kfree(mixer->id_elems);
1917 if (mixer->urb) {
1918 kfree(mixer->urb->transfer_buffer);
1919 usb_free_urb(mixer->urb);
1920 }
1921 usb_free_urb(mixer->rc_urb);
1922 kfree(mixer->rc_setup_packet);
1923 kfree(mixer);
1924 }
1925
1926 static int snd_usb_mixer_dev_free(struct snd_device *device)
1927 {
1928 struct usb_mixer_interface *mixer = device->device_data;
1929 snd_usb_mixer_free(mixer);
1930 return 0;
1931 }
1932
1933 /*
1934 * create mixer controls
1935 *
1936 * walk through all UAC_OUTPUT_TERMINAL descriptors to search for mixers
1937 */
1938 static int snd_usb_mixer_controls(struct usb_mixer_interface *mixer)
1939 {
1940 struct mixer_build state;
1941 int err;
1942 const struct usbmix_ctl_map *map;
1943 void *p;
1944
1945 memset(&state, 0, sizeof(state));
1946 state.chip = mixer->chip;
1947 state.mixer = mixer;
1948 state.buffer = mixer->hostif->extra;
1949 state.buflen = mixer->hostif->extralen;
1950
1951 /* check the mapping table */
1952 for (map = usbmix_ctl_maps; map->id; map++) {
1953 if (map->id == state.chip->usb_id) {
1954 state.map = map->map;
1955 state.selector_map = map->selector_map;
1956 mixer->ignore_ctl_error = map->ignore_ctl_error;
1957 break;
1958 }
1959 }
1960
1961 p = NULL;
1962 while ((p = snd_usb_find_csint_desc(mixer->hostif->extra, mixer->hostif->extralen,
1963 p, UAC_OUTPUT_TERMINAL)) != NULL) {
1964 if (mixer->protocol == UAC_VERSION_1) {
1965 struct uac1_output_terminal_descriptor *desc = p;
1966
1967 if (desc->bLength < sizeof(*desc))
1968 continue; /* invalid descriptor? */
1969 set_bit(desc->bTerminalID, state.unitbitmap); /* mark terminal ID as visited */
1970 state.oterm.id = desc->bTerminalID;
1971 state.oterm.type = le16_to_cpu(desc->wTerminalType);
1972 state.oterm.name = desc->iTerminal;
1973 err = parse_audio_unit(&state, desc->bSourceID);
1974 if (err < 0)
1975 return err;
1976 } else { /* UAC_VERSION_2 */
1977 struct uac2_output_terminal_descriptor *desc = p;
1978
1979 if (desc->bLength < sizeof(*desc))
1980 continue; /* invalid descriptor? */
1981 set_bit(desc->bTerminalID, state.unitbitmap); /* mark terminal ID as visited */
1982 state.oterm.id = desc->bTerminalID;
1983 state.oterm.type = le16_to_cpu(desc->wTerminalType);
1984 state.oterm.name = desc->iTerminal;
1985 err = parse_audio_unit(&state, desc->bSourceID);
1986 if (err < 0)
1987 return err;
1988
1989 /* for UAC2, use the same approach to also add the clock selectors */
1990 err = parse_audio_unit(&state, desc->bCSourceID);
1991 if (err < 0)
1992 return err;
1993 }
1994 }
1995
1996 return 0;
1997 }
1998
1999 void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer, int unitid)
2000 {
2001 struct usb_mixer_elem_info *info;
2002
2003 for (info = mixer->id_elems[unitid]; info; info = info->next_id_elem)
2004 snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
2005 info->elem_id);
2006 }
2007
2008 static void snd_usb_mixer_dump_cval(struct snd_info_buffer *buffer,
2009 int unitid,
2010 struct usb_mixer_elem_info *cval)
2011 {
2012 static char *val_types[] = {"BOOLEAN", "INV_BOOLEAN",
2013 "S8", "U8", "S16", "U16"};
2014 snd_iprintf(buffer, " Unit: %i\n", unitid);
2015 if (cval->elem_id)
2016 snd_iprintf(buffer, " Control: name=\"%s\", index=%i\n",
2017 cval->elem_id->name, cval->elem_id->index);
2018 snd_iprintf(buffer, " Info: id=%i, control=%i, cmask=0x%x, "
2019 "channels=%i, type=\"%s\"\n", cval->id,
2020 cval->control, cval->cmask, cval->channels,
2021 val_types[cval->val_type]);
2022 snd_iprintf(buffer, " Volume: min=%i, max=%i, dBmin=%i, dBmax=%i\n",
2023 cval->min, cval->max, cval->dBmin, cval->dBmax);
2024 }
2025
2026 static void snd_usb_mixer_proc_read(struct snd_info_entry *entry,
2027 struct snd_info_buffer *buffer)
2028 {
2029 struct snd_usb_audio *chip = entry->private_data;
2030 struct usb_mixer_interface *mixer;
2031 struct usb_mixer_elem_info *cval;
2032 int unitid;
2033
2034 list_for_each_entry(mixer, &chip->mixer_list, list) {
2035 snd_iprintf(buffer,
2036 "USB Mixer: usb_id=0x%08x, ctrlif=%i, ctlerr=%i\n",
2037 chip->usb_id, snd_usb_ctrl_intf(chip),
2038 mixer->ignore_ctl_error);
2039 snd_iprintf(buffer, "Card: %s\n", chip->card->longname);
2040 for (unitid = 0; unitid < MAX_ID_ELEMS; unitid++) {
2041 for (cval = mixer->id_elems[unitid]; cval;
2042 cval = cval->next_id_elem)
2043 snd_usb_mixer_dump_cval(buffer, unitid, cval);
2044 }
2045 }
2046 }
2047
2048 static void snd_usb_mixer_interrupt_v2(struct usb_mixer_interface *mixer,
2049 int attribute, int value, int index)
2050 {
2051 struct usb_mixer_elem_info *info;
2052 __u8 unitid = (index >> 8) & 0xff;
2053 __u8 control = (value >> 8) & 0xff;
2054 __u8 channel = value & 0xff;
2055
2056 if (channel >= MAX_CHANNELS) {
2057 snd_printk(KERN_DEBUG "%s(): bogus channel number %d\n",
2058 __func__, channel);
2059 return;
2060 }
2061
2062 for (info = mixer->id_elems[unitid]; info; info = info->next_id_elem) {
2063 if (info->control != control)
2064 continue;
2065
2066 switch (attribute) {
2067 case UAC2_CS_CUR:
2068 /* invalidate cache, so the value is read from the device */
2069 if (channel)
2070 info->cached &= ~(1 << channel);
2071 else /* master channel */
2072 info->cached = 0;
2073
2074 snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
2075 info->elem_id);
2076 break;
2077
2078 case UAC2_CS_RANGE:
2079 /* TODO */
2080 break;
2081
2082 case UAC2_CS_MEM:
2083 /* TODO */
2084 break;
2085
2086 default:
2087 snd_printk(KERN_DEBUG "unknown attribute %d in interrupt\n",
2088 attribute);
2089 break;
2090 } /* switch */
2091 }
2092 }
2093
2094 static void snd_usb_mixer_interrupt(struct urb *urb)
2095 {
2096 struct usb_mixer_interface *mixer = urb->context;
2097 int len = urb->actual_length;
2098 int ustatus = urb->status;
2099
2100 if (ustatus != 0)
2101 goto requeue;
2102
2103 if (mixer->protocol == UAC_VERSION_1) {
2104 struct uac1_status_word *status;
2105
2106 for (status = urb->transfer_buffer;
2107 len >= sizeof(*status);
2108 len -= sizeof(*status), status++) {
2109 snd_printd(KERN_DEBUG "status interrupt: %02x %02x\n",
2110 status->bStatusType,
2111 status->bOriginator);
2112
2113 /* ignore any notifications not from the control interface */
2114 if ((status->bStatusType & UAC1_STATUS_TYPE_ORIG_MASK) !=
2115 UAC1_STATUS_TYPE_ORIG_AUDIO_CONTROL_IF)
2116 continue;
2117
2118 if (status->bStatusType & UAC1_STATUS_TYPE_MEM_CHANGED)
2119 snd_usb_mixer_rc_memory_change(mixer, status->bOriginator);
2120 else
2121 snd_usb_mixer_notify_id(mixer, status->bOriginator);
2122 }
2123 } else { /* UAC_VERSION_2 */
2124 struct uac2_interrupt_data_msg *msg;
2125
2126 for (msg = urb->transfer_buffer;
2127 len >= sizeof(*msg);
2128 len -= sizeof(*msg), msg++) {
2129 /* drop vendor specific and endpoint requests */
2130 if ((msg->bInfo & UAC2_INTERRUPT_DATA_MSG_VENDOR) ||
2131 (msg->bInfo & UAC2_INTERRUPT_DATA_MSG_EP))
2132 continue;
2133
2134 snd_usb_mixer_interrupt_v2(mixer, msg->bAttribute,
2135 le16_to_cpu(msg->wValue),
2136 le16_to_cpu(msg->wIndex));
2137 }
2138 }
2139
2140 requeue:
2141 if (ustatus != -ENOENT && ustatus != -ECONNRESET && ustatus != -ESHUTDOWN) {
2142 urb->dev = mixer->chip->dev;
2143 usb_submit_urb(urb, GFP_ATOMIC);
2144 }
2145 }
2146
2147 /* stop any bus activity of a mixer */
2148 void snd_usb_mixer_inactivate(struct usb_mixer_interface *mixer)
2149 {
2150 usb_kill_urb(mixer->urb);
2151 usb_kill_urb(mixer->rc_urb);
2152 }
2153
2154 int snd_usb_mixer_activate(struct usb_mixer_interface *mixer)
2155 {
2156 int err;
2157
2158 if (mixer->urb) {
2159 err = usb_submit_urb(mixer->urb, GFP_NOIO);
2160 if (err < 0)
2161 return err;
2162 }
2163
2164 return 0;
2165 }
2166
2167 /* create the handler for the optional status interrupt endpoint */
2168 static int snd_usb_mixer_status_create(struct usb_mixer_interface *mixer)
2169 {
2170 struct usb_endpoint_descriptor *ep;
2171 void *transfer_buffer;
2172 int buffer_length;
2173 unsigned int epnum;
2174
2175 /* we need one interrupt input endpoint */
2176 if (get_iface_desc(mixer->hostif)->bNumEndpoints < 1)
2177 return 0;
2178 ep = get_endpoint(mixer->hostif, 0);
2179 if (!usb_endpoint_dir_in(ep) || !usb_endpoint_xfer_int(ep))
2180 return 0;
2181
2182 epnum = usb_endpoint_num(ep);
2183 buffer_length = le16_to_cpu(ep->wMaxPacketSize);
2184 transfer_buffer = kmalloc(buffer_length, GFP_KERNEL);
2185 if (!transfer_buffer)
2186 return -ENOMEM;
2187 mixer->urb = usb_alloc_urb(0, GFP_KERNEL);
2188 if (!mixer->urb) {
2189 kfree(transfer_buffer);
2190 return -ENOMEM;
2191 }
2192 usb_fill_int_urb(mixer->urb, mixer->chip->dev,
2193 usb_rcvintpipe(mixer->chip->dev, epnum),
2194 transfer_buffer, buffer_length,
2195 snd_usb_mixer_interrupt, mixer, ep->bInterval);
2196 usb_submit_urb(mixer->urb, GFP_KERNEL);
2197 return 0;
2198 }
2199
2200 int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif,
2201 int ignore_error)
2202 {
2203 static struct snd_device_ops dev_ops = {
2204 .dev_free = snd_usb_mixer_dev_free
2205 };
2206 struct usb_mixer_interface *mixer;
2207 struct snd_info_entry *entry;
2208 int err;
2209
2210 strcpy(chip->card->mixername, "USB Mixer");
2211
2212 mixer = kzalloc(sizeof(*mixer), GFP_KERNEL);
2213 if (!mixer)
2214 return -ENOMEM;
2215 mixer->chip = chip;
2216 mixer->ignore_ctl_error = ignore_error;
2217 mixer->id_elems = kcalloc(MAX_ID_ELEMS, sizeof(*mixer->id_elems),
2218 GFP_KERNEL);
2219 if (!mixer->id_elems) {
2220 kfree(mixer);
2221 return -ENOMEM;
2222 }
2223
2224 mixer->hostif = &usb_ifnum_to_if(chip->dev, ctrlif)->altsetting[0];
2225 switch (get_iface_desc(mixer->hostif)->bInterfaceProtocol) {
2226 case UAC_VERSION_1:
2227 default:
2228 mixer->protocol = UAC_VERSION_1;
2229 break;
2230 case UAC_VERSION_2:
2231 mixer->protocol = UAC_VERSION_2;
2232 break;
2233 }
2234
2235 if ((err = snd_usb_mixer_controls(mixer)) < 0 ||
2236 (err = snd_usb_mixer_status_create(mixer)) < 0)
2237 goto _error;
2238
2239 snd_usb_mixer_apply_create_quirk(mixer);
2240
2241 err = snd_device_new(chip->card, SNDRV_DEV_LOWLEVEL, mixer, &dev_ops);
2242 if (err < 0)
2243 goto _error;
2244
2245 if (list_empty(&chip->mixer_list) &&
2246 !snd_card_proc_new(chip->card, "usbmixer", &entry))
2247 snd_info_set_text_ops(entry, chip, snd_usb_mixer_proc_read);
2248
2249 list_add(&mixer->list, &chip->mixer_list);
2250 return 0;
2251
2252 _error:
2253 snd_usb_mixer_free(mixer);
2254 return err;
2255 }
2256
2257 void snd_usb_mixer_disconnect(struct list_head *p)
2258 {
2259 struct usb_mixer_interface *mixer;
2260
2261 mixer = list_entry(p, struct usb_mixer_interface, list);
2262 usb_kill_urb(mixer->urb);
2263 usb_kill_urb(mixer->rc_urb);
2264 }
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