projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge branch 'fix/misc' into topic/misc
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / sound / usb / mixer.c
1 /*
2 * (Tentative) USB Audio Driver for ALSA
3 *
4 * Mixer control part
5 *
6 * Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
7 *
8 * Many codes borrowed from audio.c by
9 * Alan Cox (alan@lxorguk.ukuu.org.uk)
10 * Thomas Sailer (sailer@ife.ee.ethz.ch)
11 *
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 *
27 */
28
29 /*
30 * TODOs, for both the mixer and the streaming interfaces:
31 *
32 * - support for UAC2 effect units
33 * - support for graphical equalizers
34 * - RANGE and MEM set commands (UAC2)
35 * - RANGE and MEM interrupt dispatchers (UAC2)
36 * - audio channel clustering (UAC2)
37 * - audio sample rate converter units (UAC2)
38 * - proper handling of clock multipliers (UAC2)
39 * - dispatch clock change notifications (UAC2)
40 * - stop PCM streams which use a clock that became invalid
41 * - stop PCM streams which use a clock selector that has changed
42 * - parse available sample rates again when clock sources changed
43 */
44
45 #include <linux/bitops.h>
46 #include <linux/init.h>
47 #include <linux/list.h>
48 #include <linux/slab.h>
49 #include <linux/string.h>
50 #include <linux/usb.h>
51 #include <linux/usb/audio.h>
52 #include <linux/usb/audio-v2.h>
53
54 #include <sound/core.h>
55 #include <sound/control.h>
56 #include <sound/hwdep.h>
57 #include <sound/info.h>
58 #include <sound/tlv.h>
59
60 #include "usbaudio.h"
61 #include "mixer.h"
62 #include "helper.h"
63 #include "mixer_quirks.h"
64
65 #define MAX_ID_ELEMS 256
66
67 struct usb_audio_term {
68 int id;
69 int type;
70 int channels;
71 unsigned int chconfig;
72 int name;
73 };
74
75 struct usbmix_name_map;
76
77 struct mixer_build {
78 struct snd_usb_audio *chip;
79 struct usb_mixer_interface *mixer;
80 unsigned char *buffer;
81 unsigned int buflen;
82 DECLARE_BITMAP(unitbitmap, MAX_ID_ELEMS);
83 struct usb_audio_term oterm;
84 const struct usbmix_name_map *map;
85 const struct usbmix_selector_map *selector_map;
86 };
87
88 enum {
89 USB_MIXER_BOOLEAN,
90 USB_MIXER_INV_BOOLEAN,
91 USB_MIXER_S8,
92 USB_MIXER_U8,
93 USB_MIXER_S16,
94 USB_MIXER_U16,
95 };
96
97
98 /*E-mu 0202/0404/0204 eXtension Unit(XU) control*/
99 enum {
100 USB_XU_CLOCK_RATE = 0xe301,
101 USB_XU_CLOCK_SOURCE = 0xe302,
102 USB_XU_DIGITAL_IO_STATUS = 0xe303,
103 USB_XU_DEVICE_OPTIONS = 0xe304,
104 USB_XU_DIRECT_MONITORING = 0xe305,
105 USB_XU_METERING = 0xe306
106 };
107 enum {
108 USB_XU_CLOCK_SOURCE_SELECTOR = 0x02, /* clock source*/
109 USB_XU_CLOCK_RATE_SELECTOR = 0x03, /* clock rate */
110 USB_XU_DIGITAL_FORMAT_SELECTOR = 0x01, /* the spdif format */
111 USB_XU_SOFT_LIMIT_SELECTOR = 0x03 /* soft limiter */
112 };
113
114 /*
115 * manual mapping of mixer names
116 * if the mixer topology is too complicated and the parsed names are
117 * ambiguous, add the entries in usbmixer_maps.c.
118 */
119 #include "mixer_maps.c"
120
121 static const struct usbmix_name_map *
122 find_map(struct mixer_build *state, int unitid, int control)
123 {
124 const struct usbmix_name_map *p = state->map;
125
126 if (!p)
127 return NULL;
128
129 for (p = state->map; p->id; p++) {
130 if (p->id == unitid &&
131 (!control || !p->control || control == p->control))
132 return p;
133 }
134 return NULL;
135 }
136
137 /* get the mapped name if the unit matches */
138 static int
139 check_mapped_name(const struct usbmix_name_map *p, char *buf, int buflen)
140 {
141 if (!p || !p->name)
142 return 0;
143
144 buflen--;
145 return strlcpy(buf, p->name, buflen);
146 }
147
148 /* check whether the control should be ignored */
149 static inline int
150 check_ignored_ctl(const struct usbmix_name_map *p)
151 {
152 if (!p || p->name || p->dB)
153 return 0;
154 return 1;
155 }
156
157 /* dB mapping */
158 static inline void check_mapped_dB(const struct usbmix_name_map *p,
159 struct usb_mixer_elem_info *cval)
160 {
161 if (p && p->dB) {
162 cval->dBmin = p->dB->min;
163 cval->dBmax = p->dB->max;
164 }
165 }
166
167 /* get the mapped selector source name */
168 static int check_mapped_selector_name(struct mixer_build *state, int unitid,
169 int index, char *buf, int buflen)
170 {
171 const struct usbmix_selector_map *p;
172
173 if (! state->selector_map)
174 return 0;
175 for (p = state->selector_map; p->id; p++) {
176 if (p->id == unitid && index < p->count)
177 return strlcpy(buf, p->names[index], buflen);
178 }
179 return 0;
180 }
181
182 /*
183 * find an audio control unit with the given unit id
184 */
185 static void *find_audio_control_unit(struct mixer_build *state, unsigned char unit)
186 {
187 /* we just parse the header */
188 struct uac_feature_unit_descriptor *hdr = NULL;
189
190 while ((hdr = snd_usb_find_desc(state->buffer, state->buflen, hdr,
191 USB_DT_CS_INTERFACE)) != NULL) {
192 if (hdr->bLength >= 4 &&
193 hdr->bDescriptorSubtype >= UAC_INPUT_TERMINAL &&
194 hdr->bDescriptorSubtype <= UAC2_SAMPLE_RATE_CONVERTER &&
195 hdr->bUnitID == unit)
196 return hdr;
197 }
198
199 return NULL;
200 }
201
202 /*
203 * copy a string with the given id
204 */
205 static int snd_usb_copy_string_desc(struct mixer_build *state, int index, char *buf, int maxlen)
206 {
207 int len = usb_string(state->chip->dev, index, buf, maxlen - 1);
208 buf[len] = 0;
209 return len;
210 }
211
212 /*
213 * convert from the byte/word on usb descriptor to the zero-based integer
214 */
215 static int convert_signed_value(struct usb_mixer_elem_info *cval, int val)
216 {
217 switch (cval->val_type) {
218 case USB_MIXER_BOOLEAN:
219 return !!val;
220 case USB_MIXER_INV_BOOLEAN:
221 return !val;
222 case USB_MIXER_U8:
223 val &= 0xff;
224 break;
225 case USB_MIXER_S8:
226 val &= 0xff;
227 if (val >= 0x80)
228 val -= 0x100;
229 break;
230 case USB_MIXER_U16:
231 val &= 0xffff;
232 break;
233 case USB_MIXER_S16:
234 val &= 0xffff;
235 if (val >= 0x8000)
236 val -= 0x10000;
237 break;
238 }
239 return val;
240 }
241
242 /*
243 * convert from the zero-based int to the byte/word for usb descriptor
244 */
245 static int convert_bytes_value(struct usb_mixer_elem_info *cval, int val)
246 {
247 switch (cval->val_type) {
248 case USB_MIXER_BOOLEAN:
249 return !!val;
250 case USB_MIXER_INV_BOOLEAN:
251 return !val;
252 case USB_MIXER_S8:
253 case USB_MIXER_U8:
254 return val & 0xff;
255 case USB_MIXER_S16:
256 case USB_MIXER_U16:
257 return val & 0xffff;
258 }
259 return 0; /* not reached */
260 }
261
262 static int get_relative_value(struct usb_mixer_elem_info *cval, int val)
263 {
264 if (! cval->res)
265 cval->res = 1;
266 if (val < cval->min)
267 return 0;
268 else if (val >= cval->max)
269 return (cval->max - cval->min + cval->res - 1) / cval->res;
270 else
271 return (val - cval->min) / cval->res;
272 }
273
274 static int get_abs_value(struct usb_mixer_elem_info *cval, int val)
275 {
276 if (val < 0)
277 return cval->min;
278 if (! cval->res)
279 cval->res = 1;
280 val *= cval->res;
281 val += cval->min;
282 if (val > cval->max)
283 return cval->max;
284 return val;
285 }
286
287
288 /*
289 * retrieve a mixer value
290 */
291
292 static int get_ctl_value_v1(struct usb_mixer_elem_info *cval, int request, int validx, int *value_ret)
293 {
294 struct snd_usb_audio *chip = cval->mixer->chip;
295 unsigned char buf[2];
296 int val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1;
297 int timeout = 10;
298
299 while (timeout-- > 0) {
300 if (snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), request,
301 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
302 validx, snd_usb_ctrl_intf(chip) | (cval->id << 8),
303 buf, val_len, 100) >= val_len) {
304 *value_ret = convert_signed_value(cval, snd_usb_combine_bytes(buf, val_len));
305 return 0;
306 }
307 }
308 snd_printdd(KERN_ERR "cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n",
309 request, validx, snd_usb_ctrl_intf(chip) | (cval->id << 8), cval->val_type);
310 return -EINVAL;
311 }
312
313 static int get_ctl_value_v2(struct usb_mixer_elem_info *cval, int request, int validx, int *value_ret)
314 {
315 struct snd_usb_audio *chip = cval->mixer->chip;
316 unsigned char buf[2 + 3*sizeof(__u16)]; /* enough space for one range */
317 unsigned char *val;
318 int ret, size;
319 __u8 bRequest;
320
321 if (request == UAC_GET_CUR) {
322 bRequest = UAC2_CS_CUR;
323 size = sizeof(__u16);
324 } else {
325 bRequest = UAC2_CS_RANGE;
326 size = sizeof(buf);
327 }
328
329 memset(buf, 0, sizeof(buf));
330
331 ret = snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), bRequest,
332 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
333 validx, snd_usb_ctrl_intf(chip) | (cval->id << 8),
334 buf, size, 1000);
335
336 if (ret < 0) {
337 snd_printk(KERN_ERR "cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n",
338 request, validx, snd_usb_ctrl_intf(chip) | (cval->id << 8), cval->val_type);
339 return ret;
340 }
341
342 /* FIXME: how should we handle multiple triplets here? */
343
344 switch (request) {
345 case UAC_GET_CUR:
346 val = buf;
347 break;
348 case UAC_GET_MIN:
349 val = buf + sizeof(__u16);
350 break;
351 case UAC_GET_MAX:
352 val = buf + sizeof(__u16) * 2;
353 break;
354 case UAC_GET_RES:
355 val = buf + sizeof(__u16) * 3;
356 break;
357 default:
358 return -EINVAL;
359 }
360
361 *value_ret = convert_signed_value(cval, snd_usb_combine_bytes(val, sizeof(__u16)));
362
363 return 0;
364 }
365
366 static int get_ctl_value(struct usb_mixer_elem_info *cval, int request, int validx, int *value_ret)
367 {
368 return (cval->mixer->protocol == UAC_VERSION_1) ?
369 get_ctl_value_v1(cval, request, validx, value_ret) :
370 get_ctl_value_v2(cval, request, validx, value_ret);
371 }
372
373 static int get_cur_ctl_value(struct usb_mixer_elem_info *cval, int validx, int *value)
374 {
375 return get_ctl_value(cval, UAC_GET_CUR, validx, value);
376 }
377
378 /* channel = 0: master, 1 = first channel */
379 static inline int get_cur_mix_raw(struct usb_mixer_elem_info *cval,
380 int channel, int *value)
381 {
382 return get_ctl_value(cval, UAC_GET_CUR, (cval->control << 8) | channel, value);
383 }
384
385 static int get_cur_mix_value(struct usb_mixer_elem_info *cval,
386 int channel, int index, int *value)
387 {
388 int err;
389
390 if (cval->cached & (1 << channel)) {
391 *value = cval->cache_val[index];
392 return 0;
393 }
394 err = get_cur_mix_raw(cval, channel, value);
395 if (err < 0) {
396 if (!cval->mixer->ignore_ctl_error)
397 snd_printd(KERN_ERR "cannot get current value for control %d ch %d: err = %d\n",
398 cval->control, channel, err);
399 return err;
400 }
401 cval->cached |= 1 << channel;
402 cval->cache_val[index] = *value;
403 return 0;
404 }
405
406
407 /*
408 * set a mixer value
409 */
410
411 int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval,
412 int request, int validx, int value_set)
413 {
414 struct snd_usb_audio *chip = cval->mixer->chip;
415 unsigned char buf[2];
416 int val_len, timeout = 10;
417
418 if (cval->mixer->protocol == UAC_VERSION_1) {
419 val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1;
420 } else { /* UAC_VERSION_2 */
421 /* audio class v2 controls are always 2 bytes in size */
422 val_len = sizeof(__u16);
423
424 /* FIXME */
425 if (request != UAC_SET_CUR) {
426 snd_printdd(KERN_WARNING "RANGE setting not yet supported\n");
427 return -EINVAL;
428 }
429
430 request = UAC2_CS_CUR;
431 }
432
433 value_set = convert_bytes_value(cval, value_set);
434 buf[0] = value_set & 0xff;
435 buf[1] = (value_set >> 8) & 0xff;
436 while (timeout-- > 0)
437 if (snd_usb_ctl_msg(chip->dev,
438 usb_sndctrlpipe(chip->dev, 0), request,
439 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
440 validx, snd_usb_ctrl_intf(chip) | (cval->id << 8),
441 buf, val_len, 100) >= 0)
442 return 0;
443 snd_printdd(KERN_ERR "cannot set ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d, data = %#x/%#x\n",
444 request, validx, snd_usb_ctrl_intf(chip) | (cval->id << 8), cval->val_type, buf[0], buf[1]);
445 return -EINVAL;
446 }
447
448 static int set_cur_ctl_value(struct usb_mixer_elem_info *cval, int validx, int value)
449 {
450 return snd_usb_mixer_set_ctl_value(cval, UAC_SET_CUR, validx, value);
451 }
452
453 static int set_cur_mix_value(struct usb_mixer_elem_info *cval, int channel,
454 int index, int value)
455 {
456 int err;
457 unsigned int read_only = (channel == 0) ?
458 cval->master_readonly :
459 cval->ch_readonly & (1 << (channel - 1));
460
461 if (read_only) {
462 snd_printdd(KERN_INFO "%s(): channel %d of control %d is read_only\n",
463 __func__, channel, cval->control);
464 return 0;
465 }
466
467 err = snd_usb_mixer_set_ctl_value(cval, UAC_SET_CUR, (cval->control << 8) | channel,
468 value);
469 if (err < 0)
470 return err;
471 cval->cached |= 1 << channel;
472 cval->cache_val[index] = value;
473 return 0;
474 }
475
476 /*
477 * TLV callback for mixer volume controls
478 */
479 static int mixer_vol_tlv(struct snd_kcontrol *kcontrol, int op_flag,
480 unsigned int size, unsigned int __user *_tlv)
481 {
482 struct usb_mixer_elem_info *cval = kcontrol->private_data;
483 DECLARE_TLV_DB_MINMAX(scale, 0, 0);
484
485 if (size < sizeof(scale))
486 return -ENOMEM;
487 scale[2] = cval->dBmin;
488 scale[3] = cval->dBmax;
489 if (copy_to_user(_tlv, scale, sizeof(scale)))
490 return -EFAULT;
491 return 0;
492 }
493
494 /*
495 * parser routines begin here...
496 */
497
498 static int parse_audio_unit(struct mixer_build *state, int unitid);
499
500
501 /*
502 * check if the input/output channel routing is enabled on the given bitmap.
503 * used for mixer unit parser
504 */
505 static int check_matrix_bitmap(unsigned char *bmap, int ich, int och, int num_outs)
506 {
507 int idx = ich * num_outs + och;
508 return bmap[idx >> 3] & (0x80 >> (idx & 7));
509 }
510
511
512 /*
513 * add an alsa control element
514 * search and increment the index until an empty slot is found.
515 *
516 * if failed, give up and free the control instance.
517 */
518
519 static int add_control_to_empty(struct mixer_build *state, struct snd_kcontrol *kctl)
520 {
521 struct usb_mixer_elem_info *cval = kctl->private_data;
522 int err;
523
524 while (snd_ctl_find_id(state->chip->card, &kctl->id))
525 kctl->id.index++;
526 if ((err = snd_ctl_add(state->chip->card, kctl)) < 0) {
527 snd_printd(KERN_ERR "cannot add control (err = %d)\n", err);
528 return err;
529 }
530 cval->elem_id = &kctl->id;
531 cval->next_id_elem = state->mixer->id_elems[cval->id];
532 state->mixer->id_elems[cval->id] = cval;
533 return 0;
534 }
535
536
537 /*
538 * get a terminal name string
539 */
540
541 static struct iterm_name_combo {
542 int type;
543 char *name;
544 } iterm_names[] = {
545 { 0x0300, "Output" },
546 { 0x0301, "Speaker" },
547 { 0x0302, "Headphone" },
548 { 0x0303, "HMD Audio" },
549 { 0x0304, "Desktop Speaker" },
550 { 0x0305, "Room Speaker" },
551 { 0x0306, "Com Speaker" },
552 { 0x0307, "LFE" },
553 { 0x0600, "External In" },
554 { 0x0601, "Analog In" },
555 { 0x0602, "Digital In" },
556 { 0x0603, "Line" },
557 { 0x0604, "Legacy In" },
558 { 0x0605, "IEC958 In" },
559 { 0x0606, "1394 DA Stream" },
560 { 0x0607, "1394 DV Stream" },
561 { 0x0700, "Embedded" },
562 { 0x0701, "Noise Source" },
563 { 0x0702, "Equalization Noise" },
564 { 0x0703, "CD" },
565 { 0x0704, "DAT" },
566 { 0x0705, "DCC" },
567 { 0x0706, "MiniDisk" },
568 { 0x0707, "Analog Tape" },
569 { 0x0708, "Phonograph" },
570 { 0x0709, "VCR Audio" },
571 { 0x070a, "Video Disk Audio" },
572 { 0x070b, "DVD Audio" },
573 { 0x070c, "TV Tuner Audio" },
574 { 0x070d, "Satellite Rec Audio" },
575 { 0x070e, "Cable Tuner Audio" },
576 { 0x070f, "DSS Audio" },
577 { 0x0710, "Radio Receiver" },
578 { 0x0711, "Radio Transmitter" },
579 { 0x0712, "Multi-Track Recorder" },
580 { 0x0713, "Synthesizer" },
581 { 0 },
582 };
583
584 static int get_term_name(struct mixer_build *state, struct usb_audio_term *iterm,
585 unsigned char *name, int maxlen, int term_only)
586 {
587 struct iterm_name_combo *names;
588
589 if (iterm->name)
590 return snd_usb_copy_string_desc(state, iterm->name, name, maxlen);
591
592 /* virtual type - not a real terminal */
593 if (iterm->type >> 16) {
594 if (term_only)
595 return 0;
596 switch (iterm->type >> 16) {
597 case UAC_SELECTOR_UNIT:
598 strcpy(name, "Selector"); return 8;
599 case UAC1_PROCESSING_UNIT:
600 strcpy(name, "Process Unit"); return 12;
601 case UAC1_EXTENSION_UNIT:
602 strcpy(name, "Ext Unit"); return 8;
603 case UAC_MIXER_UNIT:
604 strcpy(name, "Mixer"); return 5;
605 default:
606 return sprintf(name, "Unit %d", iterm->id);
607 }
608 }
609
610 switch (iterm->type & 0xff00) {
611 case 0x0100:
612 strcpy(name, "PCM"); return 3;
613 case 0x0200:
614 strcpy(name, "Mic"); return 3;
615 case 0x0400:
616 strcpy(name, "Headset"); return 7;
617 case 0x0500:
618 strcpy(name, "Phone"); return 5;
619 }
620
621 for (names = iterm_names; names->type; names++)
622 if (names->type == iterm->type) {
623 strcpy(name, names->name);
624 return strlen(names->name);
625 }
626 return 0;
627 }
628
629
630 /*
631 * parse the source unit recursively until it reaches to a terminal
632 * or a branched unit.
633 */
634 static int check_input_term(struct mixer_build *state, int id, struct usb_audio_term *term)
635 {
636 int err;
637 void *p1;
638
639 memset(term, 0, sizeof(*term));
640 while ((p1 = find_audio_control_unit(state, id)) != NULL) {
641 unsigned char *hdr = p1;
642 term->id = id;
643 switch (hdr[2]) {
644 case UAC_INPUT_TERMINAL:
645 if (state->mixer->protocol == UAC_VERSION_1) {
646 struct uac_input_terminal_descriptor *d = p1;
647 term->type = le16_to_cpu(d->wTerminalType);
648 term->channels = d->bNrChannels;
649 term->chconfig = le16_to_cpu(d->wChannelConfig);
650 term->name = d->iTerminal;
651 } else { /* UAC_VERSION_2 */
652 struct uac2_input_terminal_descriptor *d = p1;
653 term->type = le16_to_cpu(d->wTerminalType);
654 term->channels = d->bNrChannels;
655 term->chconfig = le32_to_cpu(d->bmChannelConfig);
656 term->name = d->iTerminal;
657
658 /* call recursively to get the clock selectors */
659 err = check_input_term(state, d->bCSourceID, term);
660 if (err < 0)
661 return err;
662 }
663 return 0;
664 case UAC_FEATURE_UNIT: {
665 /* the header is the same for v1 and v2 */
666 struct uac_feature_unit_descriptor *d = p1;
667 id = d->bSourceID;
668 break; /* continue to parse */
669 }
670 case UAC_MIXER_UNIT: {
671 struct uac_mixer_unit_descriptor *d = p1;
672 term->type = d->bDescriptorSubtype << 16; /* virtual type */
673 term->channels = uac_mixer_unit_bNrChannels(d);
674 term->chconfig = uac_mixer_unit_wChannelConfig(d, state->mixer->protocol);
675 term->name = uac_mixer_unit_iMixer(d);
676 return 0;
677 }
678 case UAC_SELECTOR_UNIT:
679 case UAC2_CLOCK_SELECTOR: {
680 struct uac_selector_unit_descriptor *d = p1;
681 /* call recursively to retrieve the channel info */
682 if (check_input_term(state, d->baSourceID[0], term) < 0)
683 return -ENODEV;
684 term->type = d->bDescriptorSubtype << 16; /* virtual type */
685 term->id = id;
686 term->name = uac_selector_unit_iSelector(d);
687 return 0;
688 }
689 case UAC1_PROCESSING_UNIT:
690 case UAC1_EXTENSION_UNIT: {
691 struct uac_processing_unit_descriptor *d = p1;
692 if (d->bNrInPins) {
693 id = d->baSourceID[0];
694 break; /* continue to parse */
695 }
696 term->type = d->bDescriptorSubtype << 16; /* virtual type */
697 term->channels = uac_processing_unit_bNrChannels(d);
698 term->chconfig = uac_processing_unit_wChannelConfig(d, state->mixer->protocol);
699 term->name = uac_processing_unit_iProcessing(d, state->mixer->protocol);
700 return 0;
701 }
702 case UAC2_CLOCK_SOURCE: {
703 struct uac_clock_source_descriptor *d = p1;
704 term->type = d->bDescriptorSubtype << 16; /* virtual type */
705 term->id = id;
706 term->name = d->iClockSource;
707 return 0;
708 }
709 default:
710 return -ENODEV;
711 }
712 }
713 return -ENODEV;
714 }
715
716
717 /*
718 * Feature Unit
719 */
720
721 /* feature unit control information */
722 struct usb_feature_control_info {
723 const char *name;
724 unsigned int type; /* control type (mute, volume, etc.) */
725 };
726
727 static struct usb_feature_control_info audio_feature_info[] = {
728 { "Mute", USB_MIXER_INV_BOOLEAN },
729 { "Volume", USB_MIXER_S16 },
730 { "Tone Control - Bass", USB_MIXER_S8 },
731 { "Tone Control - Mid", USB_MIXER_S8 },
732 { "Tone Control - Treble", USB_MIXER_S8 },
733 { "Graphic Equalizer", USB_MIXER_S8 }, /* FIXME: not implemeted yet */
734 { "Auto Gain Control", USB_MIXER_BOOLEAN },
735 { "Delay Control", USB_MIXER_U16 },
736 { "Bass Boost", USB_MIXER_BOOLEAN },
737 { "Loudness", USB_MIXER_BOOLEAN },
738 /* UAC2 specific */
739 { "Input Gain Control", USB_MIXER_U16 },
740 { "Input Gain Pad Control", USB_MIXER_BOOLEAN },
741 { "Phase Inverter Control", USB_MIXER_BOOLEAN },
742 };
743
744
745 /* private_free callback */
746 static void usb_mixer_elem_free(struct snd_kcontrol *kctl)
747 {
748 kfree(kctl->private_data);
749 kctl->private_data = NULL;
750 }
751
752
753 /*
754 * interface to ALSA control for feature/mixer units
755 */
756
757 /*
758 * retrieve the minimum and maximum values for the specified control
759 */
760 static int get_min_max(struct usb_mixer_elem_info *cval, int default_min)
761 {
762 /* for failsafe */
763 cval->min = default_min;
764 cval->max = cval->min + 1;
765 cval->res = 1;
766 cval->dBmin = cval->dBmax = 0;
767
768 if (cval->val_type == USB_MIXER_BOOLEAN ||
769 cval->val_type == USB_MIXER_INV_BOOLEAN) {
770 cval->initialized = 1;
771 } else {
772 int minchn = 0;
773 if (cval->cmask) {
774 int i;
775 for (i = 0; i < MAX_CHANNELS; i++)
776 if (cval->cmask & (1 << i)) {
777 minchn = i + 1;
778 break;
779 }
780 }
781 if (get_ctl_value(cval, UAC_GET_MAX, (cval->control << 8) | minchn, &cval->max) < 0 ||
782 get_ctl_value(cval, UAC_GET_MIN, (cval->control << 8) | minchn, &cval->min) < 0) {
783 snd_printd(KERN_ERR "%d:%d: cannot get min/max values for control %d (id %d)\n",
784 cval->id, snd_usb_ctrl_intf(cval->mixer->chip), cval->control, cval->id);
785 return -EINVAL;
786 }
787 if (get_ctl_value(cval, UAC_GET_RES, (cval->control << 8) | minchn, &cval->res) < 0) {
788 cval->res = 1;
789 } else {
790 int last_valid_res = cval->res;
791
792 while (cval->res > 1) {
793 if (snd_usb_mixer_set_ctl_value(cval, UAC_SET_RES,
794 (cval->control << 8) | minchn, cval->res / 2) < 0)
795 break;
796 cval->res /= 2;
797 }
798 if (get_ctl_value(cval, UAC_GET_RES, (cval->control << 8) | minchn, &cval->res) < 0)
799 cval->res = last_valid_res;
800 }
801 if (cval->res == 0)
802 cval->res = 1;
803
804 /* Additional checks for the proper resolution
805 *
806 * Some devices report smaller resolutions than actually
807 * reacting. They don't return errors but simply clip
808 * to the lower aligned value.
809 */
810 if (cval->min + cval->res < cval->max) {
811 int last_valid_res = cval->res;
812 int saved, test, check;
813 get_cur_mix_raw(cval, minchn, &saved);
814 for (;;) {
815 test = saved;
816 if (test < cval->max)
817 test += cval->res;
818 else
819 test -= cval->res;
820 if (test < cval->min || test > cval->max ||
821 set_cur_mix_value(cval, minchn, 0, test) ||
822 get_cur_mix_raw(cval, minchn, &check)) {
823 cval->res = last_valid_res;
824 break;
825 }
826 if (test == check)
827 break;
828 cval->res *= 2;
829 }
830 set_cur_mix_value(cval, minchn, 0, saved);
831 }
832
833 cval->initialized = 1;
834 }
835
836 /* USB descriptions contain the dB scale in 1/256 dB unit
837 * while ALSA TLV contains in 1/100 dB unit
838 */
839 cval->dBmin = (convert_signed_value(cval, cval->min) * 100) / 256;
840 cval->dBmax = (convert_signed_value(cval, cval->max) * 100) / 256;
841 if (cval->dBmin > cval->dBmax) {
842 /* something is wrong; assume it's either from/to 0dB */
843 if (cval->dBmin < 0)
844 cval->dBmax = 0;
845 else if (cval->dBmin > 0)
846 cval->dBmin = 0;
847 if (cval->dBmin > cval->dBmax) {
848 /* totally crap, return an error */
849 return -EINVAL;
850 }
851 }
852
853 return 0;
854 }
855
856
857 /* get a feature/mixer unit info */
858 static int mixer_ctl_feature_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
859 {
860 struct usb_mixer_elem_info *cval = kcontrol->private_data;
861
862 if (cval->val_type == USB_MIXER_BOOLEAN ||
863 cval->val_type == USB_MIXER_INV_BOOLEAN)
864 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
865 else
866 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
867 uinfo->count = cval->channels;
868 if (cval->val_type == USB_MIXER_BOOLEAN ||
869 cval->val_type == USB_MIXER_INV_BOOLEAN) {
870 uinfo->value.integer.min = 0;
871 uinfo->value.integer.max = 1;
872 } else {
873 if (! cval->initialized)
874 get_min_max(cval, 0);
875 uinfo->value.integer.min = 0;
876 uinfo->value.integer.max =
877 (cval->max - cval->min + cval->res - 1) / cval->res;
878 }
879 return 0;
880 }
881
882 /* get the current value from feature/mixer unit */
883 static int mixer_ctl_feature_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
884 {
885 struct usb_mixer_elem_info *cval = kcontrol->private_data;
886 int c, cnt, val, err;
887
888 ucontrol->value.integer.value[0] = cval->min;
889 if (cval->cmask) {
890 cnt = 0;
891 for (c = 0; c < MAX_CHANNELS; c++) {
892 if (!(cval->cmask & (1 << c)))
893 continue;
894 err = get_cur_mix_value(cval, c + 1, cnt, &val);
895 if (err < 0)
896 return cval->mixer->ignore_ctl_error ? 0 : err;
897 val = get_relative_value(cval, val);
898 ucontrol->value.integer.value[cnt] = val;
899 cnt++;
900 }
901 return 0;
902 } else {
903 /* master channel */
904 err = get_cur_mix_value(cval, 0, 0, &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[0] = val;
909 }
910 return 0;
911 }
912
913 /* put the current value to feature/mixer unit */
914 static int mixer_ctl_feature_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
915 {
916 struct usb_mixer_elem_info *cval = kcontrol->private_data;
917 int c, cnt, val, oval, err;
918 int changed = 0;
919
920 if (cval->cmask) {
921 cnt = 0;
922 for (c = 0; c < MAX_CHANNELS; c++) {
923 if (!(cval->cmask & (1 << c)))
924 continue;
925 err = get_cur_mix_value(cval, c + 1, cnt, &oval);
926 if (err < 0)
927 return cval->mixer->ignore_ctl_error ? 0 : err;
928 val = ucontrol->value.integer.value[cnt];
929 val = get_abs_value(cval, val);
930 if (oval != val) {
931 set_cur_mix_value(cval, c + 1, cnt, val);
932 changed = 1;
933 }
934 cnt++;
935 }
936 } else {
937 /* master channel */
938 err = get_cur_mix_value(cval, 0, 0, &oval);
939 if (err < 0)
940 return cval->mixer->ignore_ctl_error ? 0 : err;
941 val = ucontrol->value.integer.value[0];
942 val = get_abs_value(cval, val);
943 if (val != oval) {
944 set_cur_mix_value(cval, 0, 0, val);
945 changed = 1;
946 }
947 }
948 return changed;
949 }
950
951 static struct snd_kcontrol_new usb_feature_unit_ctl = {
952 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
953 .name = "", /* will be filled later manually */
954 .info = mixer_ctl_feature_info,
955 .get = mixer_ctl_feature_get,
956 .put = mixer_ctl_feature_put,
957 };
958
959 /* the read-only variant */
960 static struct snd_kcontrol_new usb_feature_unit_ctl_ro = {
961 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
962 .name = "", /* will be filled later manually */
963 .info = mixer_ctl_feature_info,
964 .get = mixer_ctl_feature_get,
965 .put = NULL,
966 };
967
968
969 /*
970 * build a feature control
971 */
972
973 static size_t append_ctl_name(struct snd_kcontrol *kctl, const char *str)
974 {
975 return strlcat(kctl->id.name, str, sizeof(kctl->id.name));
976 }
977
978 static void build_feature_ctl(struct mixer_build *state, void *raw_desc,
979 unsigned int ctl_mask, int control,
980 struct usb_audio_term *iterm, int unitid,
981 int readonly_mask)
982 {
983 struct uac_feature_unit_descriptor *desc = raw_desc;
984 unsigned int len = 0;
985 int mapped_name = 0;
986 int nameid = uac_feature_unit_iFeature(desc);
987 struct snd_kcontrol *kctl;
988 struct usb_mixer_elem_info *cval;
989 const struct usbmix_name_map *map;
990 unsigned int range;
991
992 control++; /* change from zero-based to 1-based value */
993
994 if (control == UAC_FU_GRAPHIC_EQUALIZER) {
995 /* FIXME: not supported yet */
996 return;
997 }
998
999 map = find_map(state, unitid, control);
1000 if (check_ignored_ctl(map))
1001 return;
1002
1003 cval = kzalloc(sizeof(*cval), GFP_KERNEL);
1004 if (! cval) {
1005 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
1006 return;
1007 }
1008 cval->mixer = state->mixer;
1009 cval->id = unitid;
1010 cval->control = control;
1011 cval->cmask = ctl_mask;
1012 cval->val_type = audio_feature_info[control-1].type;
1013 if (ctl_mask == 0) {
1014 cval->channels = 1; /* master channel */
1015 cval->master_readonly = readonly_mask;
1016 } else {
1017 int i, c = 0;
1018 for (i = 0; i < 16; i++)
1019 if (ctl_mask & (1 << i))
1020 c++;
1021 cval->channels = c;
1022 cval->ch_readonly = readonly_mask;
1023 }
1024
1025 /* get min/max values */
1026 get_min_max(cval, 0);
1027
1028 /* if all channels in the mask are marked read-only, make the control
1029 * read-only. set_cur_mix_value() will check the mask again and won't
1030 * issue write commands to read-only channels. */
1031 if (cval->channels == readonly_mask)
1032 kctl = snd_ctl_new1(&usb_feature_unit_ctl_ro, cval);
1033 else
1034 kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval);
1035
1036 if (! kctl) {
1037 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
1038 kfree(cval);
1039 return;
1040 }
1041 kctl->private_free = usb_mixer_elem_free;
1042
1043 len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name));
1044 mapped_name = len != 0;
1045 if (! len && nameid)
1046 len = snd_usb_copy_string_desc(state, nameid,
1047 kctl->id.name, sizeof(kctl->id.name));
1048
1049 switch (control) {
1050 case UAC_FU_MUTE:
1051 case UAC_FU_VOLUME:
1052 /* determine the control name. the rule is:
1053 * - if a name id is given in descriptor, use it.
1054 * - if the connected input can be determined, then use the name
1055 * of terminal type.
1056 * - if the connected output can be determined, use it.
1057 * - otherwise, anonymous name.
1058 */
1059 if (! len) {
1060 len = get_term_name(state, iterm, kctl->id.name, sizeof(kctl->id.name), 1);
1061 if (! len)
1062 len = get_term_name(state, &state->oterm, kctl->id.name, sizeof(kctl->id.name), 1);
1063 if (! len)
1064 len = snprintf(kctl->id.name, sizeof(kctl->id.name),
1065 "Feature %d", unitid);
1066 }
1067 /* determine the stream direction:
1068 * if the connected output is USB stream, then it's likely a
1069 * capture stream. otherwise it should be playback (hopefully :)
1070 */
1071 if (! mapped_name && ! (state->oterm.type >> 16)) {
1072 if ((state->oterm.type & 0xff00) == 0x0100) {
1073 len = append_ctl_name(kctl, " Capture");
1074 } else {
1075 len = append_ctl_name(kctl, " Playback");
1076 }
1077 }
1078 append_ctl_name(kctl, control == UAC_FU_MUTE ?
1079 " Switch" : " Volume");
1080 if (control == UAC_FU_VOLUME) {
1081 kctl->tlv.c = mixer_vol_tlv;
1082 kctl->vd[0].access |=
1083 SNDRV_CTL_ELEM_ACCESS_TLV_READ |
1084 SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK;
1085 check_mapped_dB(map, cval);
1086 }
1087 break;
1088
1089 default:
1090 if (! len)
1091 strlcpy(kctl->id.name, audio_feature_info[control-1].name,
1092 sizeof(kctl->id.name));
1093 break;
1094 }
1095
1096 /* volume control quirks */
1097 switch (state->chip->usb_id) {
1098 case USB_ID(0x0471, 0x0101):
1099 case USB_ID(0x0471, 0x0104):
1100 case USB_ID(0x0471, 0x0105):
1101 case USB_ID(0x0672, 0x1041):
1102 /* quirk for UDA1321/N101.
1103 * note that detection between firmware 2.1.1.7 (N101)
1104 * and later 2.1.1.21 is not very clear from datasheets.
1105 * I hope that the min value is -15360 for newer firmware --jk
1106 */
1107 if (!strcmp(kctl->id.name, "PCM Playback Volume") &&
1108 cval->min == -15616) {
1109 snd_printk(KERN_INFO
1110 "set volume quirk for UDA1321/N101 chip\n");
1111 cval->max = -256;
1112 }
1113 break;
1114
1115 case USB_ID(0x046d, 0x09a4):
1116 if (!strcmp(kctl->id.name, "Mic Capture Volume")) {
1117 snd_printk(KERN_INFO
1118 "set volume quirk for QuickCam E3500\n");
1119 cval->min = 6080;
1120 cval->max = 8768;
1121 cval->res = 192;
1122 }
1123 break;
1124
1125 case USB_ID(0x046d, 0x0808):
1126 case USB_ID(0x046d, 0x0809):
1127 case USB_ID(0x046d, 0x0991):
1128 /* Most audio usb devices lie about volume resolution.
1129 * Most Logitech webcams have res = 384.
1130 * Proboly there is some logitech magic behind this number --fishor
1131 */
1132 if (!strcmp(kctl->id.name, "Mic Capture Volume")) {
1133 snd_printk(KERN_INFO
1134 "set resolution quirk: cval->res = 384\n");
1135 cval->res = 384;
1136 }
1137 break;
1138
1139 }
1140
1141 range = (cval->max - cval->min) / cval->res;
1142 /* Are there devices with volume range more than 255? I use a bit more
1143 * to be sure. 384 is a resolution magic number found on Logitech
1144 * devices. It will definitively catch all buggy Logitech devices.
1145 */
1146 if (range > 384) {
1147 snd_printk(KERN_WARNING "usb_audio: Warning! Unlikely big "
1148 "volume range (=%u), cval->res is probably wrong.",
1149 range);
1150 snd_printk(KERN_WARNING "usb_audio: [%d] FU [%s] ch = %d, "
1151 "val = %d/%d/%d", cval->id,
1152 kctl->id.name, cval->channels,
1153 cval->min, cval->max, cval->res);
1154 }
1155
1156 snd_printdd(KERN_INFO "[%d] FU [%s] ch = %d, val = %d/%d/%d\n",
1157 cval->id, kctl->id.name, cval->channels, cval->min, cval->max, cval->res);
1158 add_control_to_empty(state, kctl);
1159 }
1160
1161
1162
1163 /*
1164 * parse a feature unit
1165 *
1166 * most of controlls are defined here.
1167 */
1168 static int parse_audio_feature_unit(struct mixer_build *state, int unitid, void *_ftr)
1169 {
1170 int channels, i, j;
1171 struct usb_audio_term iterm;
1172 unsigned int master_bits, first_ch_bits;
1173 int err, csize;
1174 struct uac_feature_unit_descriptor *hdr = _ftr;
1175 __u8 *bmaControls;
1176
1177 if (state->mixer->protocol == UAC_VERSION_1) {
1178 csize = hdr->bControlSize;
1179 channels = (hdr->bLength - 7) / csize - 1;
1180 bmaControls = hdr->bmaControls;
1181 } else {
1182 struct uac2_feature_unit_descriptor *ftr = _ftr;
1183 csize = 4;
1184 channels = (hdr->bLength - 6) / 4 - 1;
1185 bmaControls = ftr->bmaControls;
1186 }
1187
1188 if (hdr->bLength < 7 || !csize || hdr->bLength < 7 + csize) {
1189 snd_printk(KERN_ERR "usbaudio: unit %u: invalid UAC_FEATURE_UNIT descriptor\n", unitid);
1190 return -EINVAL;
1191 }
1192
1193 /* parse the source unit */
1194 if ((err = parse_audio_unit(state, hdr->bSourceID)) < 0)
1195 return err;
1196
1197 /* determine the input source type and name */
1198 if (check_input_term(state, hdr->bSourceID, &iterm) < 0)
1199 return -EINVAL;
1200
1201 master_bits = snd_usb_combine_bytes(bmaControls, csize);
1202 /* master configuration quirks */
1203 switch (state->chip->usb_id) {
1204 case USB_ID(0x08bb, 0x2702):
1205 snd_printk(KERN_INFO
1206 "usbmixer: master volume quirk for PCM2702 chip\n");
1207 /* disable non-functional volume control */
1208 master_bits &= ~UAC_CONTROL_BIT(UAC_FU_VOLUME);
1209 break;
1210 }
1211 if (channels > 0)
1212 first_ch_bits = snd_usb_combine_bytes(bmaControls + csize, csize);
1213 else
1214 first_ch_bits = 0;
1215
1216 if (state->mixer->protocol == UAC_VERSION_1) {
1217 /* check all control types */
1218 for (i = 0; i < 10; i++) {
1219 unsigned int ch_bits = 0;
1220 for (j = 0; j < channels; j++) {
1221 unsigned int mask = snd_usb_combine_bytes(bmaControls + csize * (j+1), csize);
1222 if (mask & (1 << i))
1223 ch_bits |= (1 << j);
1224 }
1225 /* audio class v1 controls are never read-only */
1226 if (ch_bits & 1) /* the first channel must be set (for ease of programming) */
1227 build_feature_ctl(state, _ftr, ch_bits, i, &iterm, unitid, 0);
1228 if (master_bits & (1 << i))
1229 build_feature_ctl(state, _ftr, 0, i, &iterm, unitid, 0);
1230 }
1231 } else { /* UAC_VERSION_2 */
1232 for (i = 0; i < 30/2; i++) {
1233 unsigned int ch_bits = 0;
1234 unsigned int ch_read_only = 0;
1235
1236 for (j = 0; j < channels; j++) {
1237 unsigned int mask = snd_usb_combine_bytes(bmaControls + csize * (j+1), csize);
1238 if (uac2_control_is_readable(mask, i)) {
1239 ch_bits |= (1 << j);
1240 if (!uac2_control_is_writeable(mask, i))
1241 ch_read_only |= (1 << j);
1242 }
1243 }
1244
1245 /* NOTE: build_feature_ctl() will mark the control read-only if all channels
1246 * are marked read-only in the descriptors. Otherwise, the control will be
1247 * reported as writeable, but the driver will not actually issue a write
1248 * command for read-only channels */
1249 if (ch_bits & 1) /* the first channel must be set (for ease of programming) */
1250 build_feature_ctl(state, _ftr, ch_bits, i, &iterm, unitid, ch_read_only);
1251 if (uac2_control_is_readable(master_bits, i))
1252 build_feature_ctl(state, _ftr, 0, i, &iterm, unitid,
1253 !uac2_control_is_writeable(master_bits, i));
1254 }
1255 }
1256
1257 return 0;
1258 }
1259
1260
1261 /*
1262 * Mixer Unit
1263 */
1264
1265 /*
1266 * build a mixer unit control
1267 *
1268 * the callbacks are identical with feature unit.
1269 * input channel number (zero based) is given in control field instead.
1270 */
1271
1272 static void build_mixer_unit_ctl(struct mixer_build *state,
1273 struct uac_mixer_unit_descriptor *desc,
1274 int in_pin, int in_ch, int unitid,
1275 struct usb_audio_term *iterm)
1276 {
1277 struct usb_mixer_elem_info *cval;
1278 unsigned int num_outs = uac_mixer_unit_bNrChannels(desc);
1279 unsigned int i, len;
1280 struct snd_kcontrol *kctl;
1281 const struct usbmix_name_map *map;
1282
1283 map = find_map(state, unitid, 0);
1284 if (check_ignored_ctl(map))
1285 return;
1286
1287 cval = kzalloc(sizeof(*cval), GFP_KERNEL);
1288 if (! cval)
1289 return;
1290
1291 cval->mixer = state->mixer;
1292 cval->id = unitid;
1293 cval->control = in_ch + 1; /* based on 1 */
1294 cval->val_type = USB_MIXER_S16;
1295 for (i = 0; i < num_outs; i++) {
1296 if (check_matrix_bitmap(uac_mixer_unit_bmControls(desc, state->mixer->protocol), in_ch, i, num_outs)) {
1297 cval->cmask |= (1 << i);
1298 cval->channels++;
1299 }
1300 }
1301
1302 /* get min/max values */
1303 get_min_max(cval, 0);
1304
1305 kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval);
1306 if (! kctl) {
1307 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
1308 kfree(cval);
1309 return;
1310 }
1311 kctl->private_free = usb_mixer_elem_free;
1312
1313 len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name));
1314 if (! len)
1315 len = get_term_name(state, iterm, kctl->id.name, sizeof(kctl->id.name), 0);
1316 if (! len)
1317 len = sprintf(kctl->id.name, "Mixer Source %d", in_ch + 1);
1318 append_ctl_name(kctl, " Volume");
1319
1320 snd_printdd(KERN_INFO "[%d] MU [%s] ch = %d, val = %d/%d\n",
1321 cval->id, kctl->id.name, cval->channels, cval->min, cval->max);
1322 add_control_to_empty(state, kctl);
1323 }
1324
1325
1326 /*
1327 * parse a mixer unit
1328 */
1329 static int parse_audio_mixer_unit(struct mixer_build *state, int unitid, void *raw_desc)
1330 {
1331 struct uac_mixer_unit_descriptor *desc = raw_desc;
1332 struct usb_audio_term iterm;
1333 int input_pins, num_ins, num_outs;
1334 int pin, ich, err;
1335
1336 if (desc->bLength < 11 || ! (input_pins = desc->bNrInPins) || ! (num_outs = uac_mixer_unit_bNrChannels(desc))) {
1337 snd_printk(KERN_ERR "invalid MIXER UNIT descriptor %d\n", unitid);
1338 return -EINVAL;
1339 }
1340 /* no bmControls field (e.g. Maya44) -> ignore */
1341 if (desc->bLength <= 10 + input_pins) {
1342 snd_printdd(KERN_INFO "MU %d has no bmControls field\n", unitid);
1343 return 0;
1344 }
1345
1346 num_ins = 0;
1347 ich = 0;
1348 for (pin = 0; pin < input_pins; pin++) {
1349 err = parse_audio_unit(state, desc->baSourceID[pin]);
1350 if (err < 0)
1351 return err;
1352 err = check_input_term(state, desc->baSourceID[pin], &iterm);
1353 if (err < 0)
1354 return err;
1355 num_ins += iterm.channels;
1356 for (; ich < num_ins; ++ich) {
1357 int och, ich_has_controls = 0;
1358
1359 for (och = 0; och < num_outs; ++och) {
1360 if (check_matrix_bitmap(uac_mixer_unit_bmControls(desc, state->mixer->protocol),
1361 ich, och, num_outs)) {
1362 ich_has_controls = 1;
1363 break;
1364 }
1365 }
1366 if (ich_has_controls)
1367 build_mixer_unit_ctl(state, desc, pin, ich,
1368 unitid, &iterm);
1369 }
1370 }
1371 return 0;
1372 }
1373
1374
1375 /*
1376 * Processing Unit / Extension Unit
1377 */
1378
1379 /* get callback for processing/extension unit */
1380 static int mixer_ctl_procunit_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
1381 {
1382 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1383 int err, val;
1384
1385 err = get_cur_ctl_value(cval, cval->control << 8, &val);
1386 if (err < 0 && cval->mixer->ignore_ctl_error) {
1387 ucontrol->value.integer.value[0] = cval->min;
1388 return 0;
1389 }
1390 if (err < 0)
1391 return err;
1392 val = get_relative_value(cval, val);
1393 ucontrol->value.integer.value[0] = val;
1394 return 0;
1395 }
1396
1397 /* put callback for processing/extension unit */
1398 static int mixer_ctl_procunit_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
1399 {
1400 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1401 int val, oval, err;
1402
1403 err = get_cur_ctl_value(cval, cval->control << 8, &oval);
1404 if (err < 0) {
1405 if (cval->mixer->ignore_ctl_error)
1406 return 0;
1407 return err;
1408 }
1409 val = ucontrol->value.integer.value[0];
1410 val = get_abs_value(cval, val);
1411 if (val != oval) {
1412 set_cur_ctl_value(cval, cval->control << 8, val);
1413 return 1;
1414 }
1415 return 0;
1416 }
1417
1418 /* alsa control interface for processing/extension unit */
1419 static struct snd_kcontrol_new mixer_procunit_ctl = {
1420 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1421 .name = "", /* will be filled later */
1422 .info = mixer_ctl_feature_info,
1423 .get = mixer_ctl_procunit_get,
1424 .put = mixer_ctl_procunit_put,
1425 };
1426
1427
1428 /*
1429 * predefined data for processing units
1430 */
1431 struct procunit_value_info {
1432 int control;
1433 char *suffix;
1434 int val_type;
1435 int min_value;
1436 };
1437
1438 struct procunit_info {
1439 int type;
1440 char *name;
1441 struct procunit_value_info *values;
1442 };
1443
1444 static struct procunit_value_info updown_proc_info[] = {
1445 { UAC_UD_ENABLE, "Switch", USB_MIXER_BOOLEAN },
1446 { UAC_UD_MODE_SELECT, "Mode Select", USB_MIXER_U8, 1 },
1447 { 0 }
1448 };
1449 static struct procunit_value_info prologic_proc_info[] = {
1450 { UAC_DP_ENABLE, "Switch", USB_MIXER_BOOLEAN },
1451 { UAC_DP_MODE_SELECT, "Mode Select", USB_MIXER_U8, 1 },
1452 { 0 }
1453 };
1454 static struct procunit_value_info threed_enh_proc_info[] = {
1455 { UAC_3D_ENABLE, "Switch", USB_MIXER_BOOLEAN },
1456 { UAC_3D_SPACE, "Spaciousness", USB_MIXER_U8 },
1457 { 0 }
1458 };
1459 static struct procunit_value_info reverb_proc_info[] = {
1460 { UAC_REVERB_ENABLE, "Switch", USB_MIXER_BOOLEAN },
1461 { UAC_REVERB_LEVEL, "Level", USB_MIXER_U8 },
1462 { UAC_REVERB_TIME, "Time", USB_MIXER_U16 },
1463 { UAC_REVERB_FEEDBACK, "Feedback", USB_MIXER_U8 },
1464 { 0 }
1465 };
1466 static struct procunit_value_info chorus_proc_info[] = {
1467 { UAC_CHORUS_ENABLE, "Switch", USB_MIXER_BOOLEAN },
1468 { UAC_CHORUS_LEVEL, "Level", USB_MIXER_U8 },
1469 { UAC_CHORUS_RATE, "Rate", USB_MIXER_U16 },
1470 { UAC_CHORUS_DEPTH, "Depth", USB_MIXER_U16 },
1471 { 0 }
1472 };
1473 static struct procunit_value_info dcr_proc_info[] = {
1474 { UAC_DCR_ENABLE, "Switch", USB_MIXER_BOOLEAN },
1475 { UAC_DCR_RATE, "Ratio", USB_MIXER_U16 },
1476 { UAC_DCR_MAXAMPL, "Max Amp", USB_MIXER_S16 },
1477 { UAC_DCR_THRESHOLD, "Threshold", USB_MIXER_S16 },
1478 { UAC_DCR_ATTACK_TIME, "Attack Time", USB_MIXER_U16 },
1479 { UAC_DCR_RELEASE_TIME, "Release Time", USB_MIXER_U16 },
1480 { 0 }
1481 };
1482
1483 static struct procunit_info procunits[] = {
1484 { UAC_PROCESS_UP_DOWNMIX, "Up Down", updown_proc_info },
1485 { UAC_PROCESS_DOLBY_PROLOGIC, "Dolby Prologic", prologic_proc_info },
1486 { UAC_PROCESS_STEREO_EXTENDER, "3D Stereo Extender", threed_enh_proc_info },
1487 { UAC_PROCESS_REVERB, "Reverb", reverb_proc_info },
1488 { UAC_PROCESS_CHORUS, "Chorus", chorus_proc_info },
1489 { UAC_PROCESS_DYN_RANGE_COMP, "DCR", dcr_proc_info },
1490 { 0 },
1491 };
1492 /*
1493 * predefined data for extension units
1494 */
1495 static struct procunit_value_info clock_rate_xu_info[] = {
1496 { USB_XU_CLOCK_RATE_SELECTOR, "Selector", USB_MIXER_U8, 0 },
1497 { 0 }
1498 };
1499 static struct procunit_value_info clock_source_xu_info[] = {
1500 { USB_XU_CLOCK_SOURCE_SELECTOR, "External", USB_MIXER_BOOLEAN },
1501 { 0 }
1502 };
1503 static struct procunit_value_info spdif_format_xu_info[] = {
1504 { USB_XU_DIGITAL_FORMAT_SELECTOR, "SPDIF/AC3", USB_MIXER_BOOLEAN },
1505 { 0 }
1506 };
1507 static struct procunit_value_info soft_limit_xu_info[] = {
1508 { USB_XU_SOFT_LIMIT_SELECTOR, " ", USB_MIXER_BOOLEAN },
1509 { 0 }
1510 };
1511 static struct procunit_info extunits[] = {
1512 { USB_XU_CLOCK_RATE, "Clock rate", clock_rate_xu_info },
1513 { USB_XU_CLOCK_SOURCE, "DigitalIn CLK source", clock_source_xu_info },
1514 { USB_XU_DIGITAL_IO_STATUS, "DigitalOut format:", spdif_format_xu_info },
1515 { USB_XU_DEVICE_OPTIONS, "AnalogueIn Soft Limit", soft_limit_xu_info },
1516 { 0 }
1517 };
1518 /*
1519 * build a processing/extension unit
1520 */
1521 static int build_audio_procunit(struct mixer_build *state, int unitid, void *raw_desc, struct procunit_info *list, char *name)
1522 {
1523 struct uac_processing_unit_descriptor *desc = raw_desc;
1524 int num_ins = desc->bNrInPins;
1525 struct usb_mixer_elem_info *cval;
1526 struct snd_kcontrol *kctl;
1527 int i, err, nameid, type, len;
1528 struct procunit_info *info;
1529 struct procunit_value_info *valinfo;
1530 const struct usbmix_name_map *map;
1531 static struct procunit_value_info default_value_info[] = {
1532 { 0x01, "Switch", USB_MIXER_BOOLEAN },
1533 { 0 }
1534 };
1535 static struct procunit_info default_info = {
1536 0, NULL, default_value_info
1537 };
1538
1539 if (desc->bLength < 13 || desc->bLength < 13 + num_ins ||
1540 desc->bLength < num_ins + uac_processing_unit_bControlSize(desc, state->mixer->protocol)) {
1541 snd_printk(KERN_ERR "invalid %s descriptor (id %d)\n", name, unitid);
1542 return -EINVAL;
1543 }
1544
1545 for (i = 0; i < num_ins; i++) {
1546 if ((err = parse_audio_unit(state, desc->baSourceID[i])) < 0)
1547 return err;
1548 }
1549
1550 type = le16_to_cpu(desc->wProcessType);
1551 for (info = list; info && info->type; info++)
1552 if (info->type == type)
1553 break;
1554 if (! info || ! info->type)
1555 info = &default_info;
1556
1557 for (valinfo = info->values; valinfo->control; valinfo++) {
1558 __u8 *controls = uac_processing_unit_bmControls(desc, state->mixer->protocol);
1559
1560 if (! (controls[valinfo->control / 8] & (1 << ((valinfo->control % 8) - 1))))
1561 continue;
1562 map = find_map(state, unitid, valinfo->control);
1563 if (check_ignored_ctl(map))
1564 continue;
1565 cval = kzalloc(sizeof(*cval), GFP_KERNEL);
1566 if (! cval) {
1567 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
1568 return -ENOMEM;
1569 }
1570 cval->mixer = state->mixer;
1571 cval->id = unitid;
1572 cval->control = valinfo->control;
1573 cval->val_type = valinfo->val_type;
1574 cval->channels = 1;
1575
1576 /* get min/max values */
1577 if (type == UAC_PROCESS_UP_DOWNMIX && cval->control == UAC_UD_MODE_SELECT) {
1578 __u8 *control_spec = uac_processing_unit_specific(desc, state->mixer->protocol);
1579 /* FIXME: hard-coded */
1580 cval->min = 1;
1581 cval->max = control_spec[0];
1582 cval->res = 1;
1583 cval->initialized = 1;
1584 } else {
1585 if (type == USB_XU_CLOCK_RATE) {
1586 /* E-Mu USB 0404/0202/TrackerPre/0204
1587 * samplerate control quirk
1588 */
1589 cval->min = 0;
1590 cval->max = 5;
1591 cval->res = 1;
1592 cval->initialized = 1;
1593 } else
1594 get_min_max(cval, valinfo->min_value);
1595 }
1596
1597 kctl = snd_ctl_new1(&mixer_procunit_ctl, cval);
1598 if (! kctl) {
1599 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
1600 kfree(cval);
1601 return -ENOMEM;
1602 }
1603 kctl->private_free = usb_mixer_elem_free;
1604
1605 if (check_mapped_name(map, kctl->id.name,
1606 sizeof(kctl->id.name)))
1607 /* nothing */ ;
1608 else if (info->name)
1609 strlcpy(kctl->id.name, info->name, sizeof(kctl->id.name));
1610 else {
1611 nameid = uac_processing_unit_iProcessing(desc, state->mixer->protocol);
1612 len = 0;
1613 if (nameid)
1614 len = snd_usb_copy_string_desc(state, nameid, kctl->id.name, sizeof(kctl->id.name));
1615 if (! len)
1616 strlcpy(kctl->id.name, name, sizeof(kctl->id.name));
1617 }
1618 append_ctl_name(kctl, " ");
1619 append_ctl_name(kctl, valinfo->suffix);
1620
1621 snd_printdd(KERN_INFO "[%d] PU [%s] ch = %d, val = %d/%d\n",
1622 cval->id, kctl->id.name, cval->channels, cval->min, cval->max);
1623 if ((err = add_control_to_empty(state, kctl)) < 0)
1624 return err;
1625 }
1626 return 0;
1627 }
1628
1629
1630 static int parse_audio_processing_unit(struct mixer_build *state, int unitid, void *raw_desc)
1631 {
1632 return build_audio_procunit(state, unitid, raw_desc, procunits, "Processing Unit");
1633 }
1634
1635 static int parse_audio_extension_unit(struct mixer_build *state, int unitid, void *raw_desc)
1636 {
1637 /* Note that we parse extension units with processing unit descriptors.
1638 * That's ok as the layout is the same */
1639 return build_audio_procunit(state, unitid, raw_desc, extunits, "Extension Unit");
1640 }
1641
1642
1643 /*
1644 * Selector Unit
1645 */
1646
1647 /* info callback for selector unit
1648 * use an enumerator type for routing
1649 */
1650 static int mixer_ctl_selector_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
1651 {
1652 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1653 const char **itemlist = (const char **)kcontrol->private_value;
1654
1655 if (snd_BUG_ON(!itemlist))
1656 return -EINVAL;
1657 return snd_ctl_enum_info(uinfo, 1, cval->max, itemlist);
1658 }
1659
1660 /* get callback for selector unit */
1661 static int mixer_ctl_selector_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
1662 {
1663 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1664 int val, err;
1665
1666 err = get_cur_ctl_value(cval, cval->control << 8, &val);
1667 if (err < 0) {
1668 if (cval->mixer->ignore_ctl_error) {
1669 ucontrol->value.enumerated.item[0] = 0;
1670 return 0;
1671 }
1672 return err;
1673 }
1674 val = get_relative_value(cval, val);
1675 ucontrol->value.enumerated.item[0] = val;
1676 return 0;
1677 }
1678
1679 /* put callback for selector unit */
1680 static int mixer_ctl_selector_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
1681 {
1682 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1683 int val, oval, err;
1684
1685 err = get_cur_ctl_value(cval, cval->control << 8, &oval);
1686 if (err < 0) {
1687 if (cval->mixer->ignore_ctl_error)
1688 return 0;
1689 return err;
1690 }
1691 val = ucontrol->value.enumerated.item[0];
1692 val = get_abs_value(cval, val);
1693 if (val != oval) {
1694 set_cur_ctl_value(cval, cval->control << 8, val);
1695 return 1;
1696 }
1697 return 0;
1698 }
1699
1700 /* alsa control interface for selector unit */
1701 static struct snd_kcontrol_new mixer_selectunit_ctl = {
1702 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1703 .name = "", /* will be filled later */
1704 .info = mixer_ctl_selector_info,
1705 .get = mixer_ctl_selector_get,
1706 .put = mixer_ctl_selector_put,
1707 };
1708
1709
1710 /* private free callback.
1711 * free both private_data and private_value
1712 */
1713 static void usb_mixer_selector_elem_free(struct snd_kcontrol *kctl)
1714 {
1715 int i, num_ins = 0;
1716
1717 if (kctl->private_data) {
1718 struct usb_mixer_elem_info *cval = kctl->private_data;
1719 num_ins = cval->max;
1720 kfree(cval);
1721 kctl->private_data = NULL;
1722 }
1723 if (kctl->private_value) {
1724 char **itemlist = (char **)kctl->private_value;
1725 for (i = 0; i < num_ins; i++)
1726 kfree(itemlist[i]);
1727 kfree(itemlist);
1728 kctl->private_value = 0;
1729 }
1730 }
1731
1732 /*
1733 * parse a selector unit
1734 */
1735 static int parse_audio_selector_unit(struct mixer_build *state, int unitid, void *raw_desc)
1736 {
1737 struct uac_selector_unit_descriptor *desc = raw_desc;
1738 unsigned int i, nameid, len;
1739 int err;
1740 struct usb_mixer_elem_info *cval;
1741 struct snd_kcontrol *kctl;
1742 const struct usbmix_name_map *map;
1743 char **namelist;
1744
1745 if (!desc->bNrInPins || desc->bLength < 5 + desc->bNrInPins) {
1746 snd_printk(KERN_ERR "invalid SELECTOR UNIT descriptor %d\n", unitid);
1747 return -EINVAL;
1748 }
1749
1750 for (i = 0; i < desc->bNrInPins; i++) {
1751 if ((err = parse_audio_unit(state, desc->baSourceID[i])) < 0)
1752 return err;
1753 }
1754
1755 if (desc->bNrInPins == 1) /* only one ? nonsense! */
1756 return 0;
1757
1758 map = find_map(state, unitid, 0);
1759 if (check_ignored_ctl(map))
1760 return 0;
1761
1762 cval = kzalloc(sizeof(*cval), GFP_KERNEL);
1763 if (! cval) {
1764 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
1765 return -ENOMEM;
1766 }
1767 cval->mixer = state->mixer;
1768 cval->id = unitid;
1769 cval->val_type = USB_MIXER_U8;
1770 cval->channels = 1;
1771 cval->min = 1;
1772 cval->max = desc->bNrInPins;
1773 cval->res = 1;
1774 cval->initialized = 1;
1775
1776 if (desc->bDescriptorSubtype == UAC2_CLOCK_SELECTOR)
1777 cval->control = UAC2_CX_CLOCK_SELECTOR;
1778 else
1779 cval->control = 0;
1780
1781 namelist = kmalloc(sizeof(char *) * desc->bNrInPins, GFP_KERNEL);
1782 if (! namelist) {
1783 snd_printk(KERN_ERR "cannot malloc\n");
1784 kfree(cval);
1785 return -ENOMEM;
1786 }
1787 #define MAX_ITEM_NAME_LEN 64
1788 for (i = 0; i < desc->bNrInPins; i++) {
1789 struct usb_audio_term iterm;
1790 len = 0;
1791 namelist[i] = kmalloc(MAX_ITEM_NAME_LEN, GFP_KERNEL);
1792 if (! namelist[i]) {
1793 snd_printk(KERN_ERR "cannot malloc\n");
1794 while (i--)
1795 kfree(namelist[i]);
1796 kfree(namelist);
1797 kfree(cval);
1798 return -ENOMEM;
1799 }
1800 len = check_mapped_selector_name(state, unitid, i, namelist[i],
1801 MAX_ITEM_NAME_LEN);
1802 if (! len && check_input_term(state, desc->baSourceID[i], &iterm) >= 0)
1803 len = get_term_name(state, &iterm, namelist[i], MAX_ITEM_NAME_LEN, 0);
1804 if (! len)
1805 sprintf(namelist[i], "Input %d", i);
1806 }
1807
1808 kctl = snd_ctl_new1(&mixer_selectunit_ctl, cval);
1809 if (! kctl) {
1810 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
1811 kfree(namelist);
1812 kfree(cval);
1813 return -ENOMEM;
1814 }
1815 kctl->private_value = (unsigned long)namelist;
1816 kctl->private_free = usb_mixer_selector_elem_free;
1817
1818 nameid = uac_selector_unit_iSelector(desc);
1819 len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name));
1820 if (len)
1821 ;
1822 else if (nameid)
1823 snd_usb_copy_string_desc(state, nameid, kctl->id.name, sizeof(kctl->id.name));
1824 else {
1825 len = get_term_name(state, &state->oterm,
1826 kctl->id.name, sizeof(kctl->id.name), 0);
1827 if (! len)
1828 strlcpy(kctl->id.name, "USB", sizeof(kctl->id.name));
1829
1830 if (desc->bDescriptorSubtype == UAC2_CLOCK_SELECTOR)
1831 append_ctl_name(kctl, " Clock Source");
1832 else if ((state->oterm.type & 0xff00) == 0x0100)
1833 append_ctl_name(kctl, " Capture Source");
1834 else
1835 append_ctl_name(kctl, " Playback Source");
1836 }
1837
1838 snd_printdd(KERN_INFO "[%d] SU [%s] items = %d\n",
1839 cval->id, kctl->id.name, desc->bNrInPins);
1840 if ((err = add_control_to_empty(state, kctl)) < 0)
1841 return err;
1842
1843 return 0;
1844 }
1845
1846
1847 /*
1848 * parse an audio unit recursively
1849 */
1850
1851 static int parse_audio_unit(struct mixer_build *state, int unitid)
1852 {
1853 unsigned char *p1;
1854
1855 if (test_and_set_bit(unitid, state->unitbitmap))
1856 return 0; /* the unit already visited */
1857
1858 p1 = find_audio_control_unit(state, unitid);
1859 if (!p1) {
1860 snd_printk(KERN_ERR "usbaudio: unit %d not found!\n", unitid);
1861 return -EINVAL;
1862 }
1863
1864 switch (p1[2]) {
1865 case UAC_INPUT_TERMINAL:
1866 case UAC2_CLOCK_SOURCE:
1867 return 0; /* NOP */
1868 case UAC_MIXER_UNIT:
1869 return parse_audio_mixer_unit(state, unitid, p1);
1870 case UAC_SELECTOR_UNIT:
1871 case UAC2_CLOCK_SELECTOR:
1872 return parse_audio_selector_unit(state, unitid, p1);
1873 case UAC_FEATURE_UNIT:
1874 return parse_audio_feature_unit(state, unitid, p1);
1875 case UAC1_PROCESSING_UNIT:
1876 /* UAC2_EFFECT_UNIT has the same value */
1877 if (state->mixer->protocol == UAC_VERSION_1)
1878 return parse_audio_processing_unit(state, unitid, p1);
1879 else
1880 return 0; /* FIXME - effect units not implemented yet */
1881 case UAC1_EXTENSION_UNIT:
1882 /* UAC2_PROCESSING_UNIT_V2 has the same value */
1883 if (state->mixer->protocol == UAC_VERSION_1)
1884 return parse_audio_extension_unit(state, unitid, p1);
1885 else /* UAC_VERSION_2 */
1886 return parse_audio_processing_unit(state, unitid, p1);
1887 default:
1888 snd_printk(KERN_ERR "usbaudio: unit %u: unexpected type 0x%02x\n", unitid, p1[2]);
1889 return -EINVAL;
1890 }
1891 }
1892
1893 static void snd_usb_mixer_free(struct usb_mixer_interface *mixer)
1894 {
1895 kfree(mixer->id_elems);
1896 if (mixer->urb) {
1897 kfree(mixer->urb->transfer_buffer);
1898 usb_free_urb(mixer->urb);
1899 }
1900 usb_free_urb(mixer->rc_urb);
1901 kfree(mixer->rc_setup_packet);
1902 kfree(mixer);
1903 }
1904
1905 static int snd_usb_mixer_dev_free(struct snd_device *device)
1906 {
1907 struct usb_mixer_interface *mixer = device->device_data;
1908 snd_usb_mixer_free(mixer);
1909 return 0;
1910 }
1911
1912 /*
1913 * create mixer controls
1914 *
1915 * walk through all UAC_OUTPUT_TERMINAL descriptors to search for mixers
1916 */
1917 static int snd_usb_mixer_controls(struct usb_mixer_interface *mixer)
1918 {
1919 struct mixer_build state;
1920 int err;
1921 const struct usbmix_ctl_map *map;
1922 struct usb_host_interface *hostif;
1923 void *p;
1924
1925 hostif = mixer->chip->ctrl_intf;
1926 memset(&state, 0, sizeof(state));
1927 state.chip = mixer->chip;
1928 state.mixer = mixer;
1929 state.buffer = hostif->extra;
1930 state.buflen = hostif->extralen;
1931
1932 /* check the mapping table */
1933 for (map = usbmix_ctl_maps; map->id; map++) {
1934 if (map->id == state.chip->usb_id) {
1935 state.map = map->map;
1936 state.selector_map = map->selector_map;
1937 mixer->ignore_ctl_error = map->ignore_ctl_error;
1938 break;
1939 }
1940 }
1941
1942 p = NULL;
1943 while ((p = snd_usb_find_csint_desc(hostif->extra, hostif->extralen, p, UAC_OUTPUT_TERMINAL)) != NULL) {
1944 if (mixer->protocol == UAC_VERSION_1) {
1945 struct uac1_output_terminal_descriptor *desc = p;
1946
1947 if (desc->bLength < sizeof(*desc))
1948 continue; /* invalid descriptor? */
1949 set_bit(desc->bTerminalID, state.unitbitmap); /* mark terminal ID as visited */
1950 state.oterm.id = desc->bTerminalID;
1951 state.oterm.type = le16_to_cpu(desc->wTerminalType);
1952 state.oterm.name = desc->iTerminal;
1953 err = parse_audio_unit(&state, desc->bSourceID);
1954 if (err < 0)
1955 return err;
1956 } else { /* UAC_VERSION_2 */
1957 struct uac2_output_terminal_descriptor *desc = p;
1958
1959 if (desc->bLength < sizeof(*desc))
1960 continue; /* invalid descriptor? */
1961 set_bit(desc->bTerminalID, state.unitbitmap); /* mark terminal ID as visited */
1962 state.oterm.id = desc->bTerminalID;
1963 state.oterm.type = le16_to_cpu(desc->wTerminalType);
1964 state.oterm.name = desc->iTerminal;
1965 err = parse_audio_unit(&state, desc->bSourceID);
1966 if (err < 0)
1967 return err;
1968
1969 /* for UAC2, use the same approach to also add the clock selectors */
1970 err = parse_audio_unit(&state, desc->bCSourceID);
1971 if (err < 0)
1972 return err;
1973 }
1974 }
1975
1976 return 0;
1977 }
1978
1979 void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer, int unitid)
1980 {
1981 struct usb_mixer_elem_info *info;
1982
1983 for (info = mixer->id_elems[unitid]; info; info = info->next_id_elem)
1984 snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
1985 info->elem_id);
1986 }
1987
1988 static void snd_usb_mixer_dump_cval(struct snd_info_buffer *buffer,
1989 int unitid,
1990 struct usb_mixer_elem_info *cval)
1991 {
1992 static char *val_types[] = {"BOOLEAN", "INV_BOOLEAN",
1993 "S8", "U8", "S16", "U16"};
1994 snd_iprintf(buffer, " Unit: %i\n", unitid);
1995 if (cval->elem_id)
1996 snd_iprintf(buffer, " Control: name=\"%s\", index=%i\n",
1997 cval->elem_id->name, cval->elem_id->index);
1998 snd_iprintf(buffer, " Info: id=%i, control=%i, cmask=0x%x, "
1999 "channels=%i, type=\"%s\"\n", cval->id,
2000 cval->control, cval->cmask, cval->channels,
2001 val_types[cval->val_type]);
2002 snd_iprintf(buffer, " Volume: min=%i, max=%i, dBmin=%i, dBmax=%i\n",
2003 cval->min, cval->max, cval->dBmin, cval->dBmax);
2004 }
2005
2006 static void snd_usb_mixer_proc_read(struct snd_info_entry *entry,
2007 struct snd_info_buffer *buffer)
2008 {
2009 struct snd_usb_audio *chip = entry->private_data;
2010 struct usb_mixer_interface *mixer;
2011 struct usb_mixer_elem_info *cval;
2012 int unitid;
2013
2014 list_for_each_entry(mixer, &chip->mixer_list, list) {
2015 snd_iprintf(buffer,
2016 "USB Mixer: usb_id=0x%08x, ctrlif=%i, ctlerr=%i\n",
2017 chip->usb_id, snd_usb_ctrl_intf(chip),
2018 mixer->ignore_ctl_error);
2019 snd_iprintf(buffer, "Card: %s\n", chip->card->longname);
2020 for (unitid = 0; unitid < MAX_ID_ELEMS; unitid++) {
2021 for (cval = mixer->id_elems[unitid]; cval;
2022 cval = cval->next_id_elem)
2023 snd_usb_mixer_dump_cval(buffer, unitid, cval);
2024 }
2025 }
2026 }
2027
2028 static void snd_usb_mixer_interrupt_v2(struct usb_mixer_interface *mixer,
2029 int attribute, int value, int index)
2030 {
2031 struct usb_mixer_elem_info *info;
2032 __u8 unitid = (index >> 8) & 0xff;
2033 __u8 control = (value >> 8) & 0xff;
2034 __u8 channel = value & 0xff;
2035
2036 if (channel >= MAX_CHANNELS) {
2037 snd_printk(KERN_DEBUG "%s(): bogus channel number %d\n",
2038 __func__, channel);
2039 return;
2040 }
2041
2042 for (info = mixer->id_elems[unitid]; info; info = info->next_id_elem) {
2043 if (info->control != control)
2044 continue;
2045
2046 switch (attribute) {
2047 case UAC2_CS_CUR:
2048 /* invalidate cache, so the value is read from the device */
2049 if (channel)
2050 info->cached &= ~(1 << channel);
2051 else /* master channel */
2052 info->cached = 0;
2053
2054 snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
2055 info->elem_id);
2056 break;
2057
2058 case UAC2_CS_RANGE:
2059 /* TODO */
2060 break;
2061
2062 case UAC2_CS_MEM:
2063 /* TODO */
2064 break;
2065
2066 default:
2067 snd_printk(KERN_DEBUG "unknown attribute %d in interrupt\n",
2068 attribute);
2069 break;
2070 } /* switch */
2071 }
2072 }
2073
2074 static void snd_usb_mixer_interrupt(struct urb *urb)
2075 {
2076 struct usb_mixer_interface *mixer = urb->context;
2077 int len = urb->actual_length;
2078
2079 if (urb->status != 0)
2080 goto requeue;
2081
2082 if (mixer->protocol == UAC_VERSION_1) {
2083 struct uac1_status_word *status;
2084
2085 for (status = urb->transfer_buffer;
2086 len >= sizeof(*status);
2087 len -= sizeof(*status), status++) {
2088 snd_printd(KERN_DEBUG "status interrupt: %02x %02x\n",
2089 status->bStatusType,
2090 status->bOriginator);
2091
2092 /* ignore any notifications not from the control interface */
2093 if ((status->bStatusType & UAC1_STATUS_TYPE_ORIG_MASK) !=
2094 UAC1_STATUS_TYPE_ORIG_AUDIO_CONTROL_IF)
2095 continue;
2096
2097 if (status->bStatusType & UAC1_STATUS_TYPE_MEM_CHANGED)
2098 snd_usb_mixer_rc_memory_change(mixer, status->bOriginator);
2099 else
2100 snd_usb_mixer_notify_id(mixer, status->bOriginator);
2101 }
2102 } else { /* UAC_VERSION_2 */
2103 struct uac2_interrupt_data_msg *msg;
2104
2105 for (msg = urb->transfer_buffer;
2106 len >= sizeof(*msg);
2107 len -= sizeof(*msg), msg++) {
2108 /* drop vendor specific and endpoint requests */
2109 if ((msg->bInfo & UAC2_INTERRUPT_DATA_MSG_VENDOR) ||
2110 (msg->bInfo & UAC2_INTERRUPT_DATA_MSG_EP))
2111 continue;
2112
2113 snd_usb_mixer_interrupt_v2(mixer, msg->bAttribute,
2114 le16_to_cpu(msg->wValue),
2115 le16_to_cpu(msg->wIndex));
2116 }
2117 }
2118
2119 requeue:
2120 if (urb->status != -ENOENT && urb->status != -ECONNRESET) {
2121 urb->dev = mixer->chip->dev;
2122 usb_submit_urb(urb, GFP_ATOMIC);
2123 }
2124 }
2125
2126 /* create the handler for the optional status interrupt endpoint */
2127 static int snd_usb_mixer_status_create(struct usb_mixer_interface *mixer)
2128 {
2129 struct usb_host_interface *hostif;
2130 struct usb_endpoint_descriptor *ep;
2131 void *transfer_buffer;
2132 int buffer_length;
2133 unsigned int epnum;
2134
2135 hostif = mixer->chip->ctrl_intf;
2136 /* we need one interrupt input endpoint */
2137 if (get_iface_desc(hostif)->bNumEndpoints < 1)
2138 return 0;
2139 ep = get_endpoint(hostif, 0);
2140 if (!usb_endpoint_dir_in(ep) || !usb_endpoint_xfer_int(ep))
2141 return 0;
2142
2143 epnum = usb_endpoint_num(ep);
2144 buffer_length = le16_to_cpu(ep->wMaxPacketSize);
2145 transfer_buffer = kmalloc(buffer_length, GFP_KERNEL);
2146 if (!transfer_buffer)
2147 return -ENOMEM;
2148 mixer->urb = usb_alloc_urb(0, GFP_KERNEL);
2149 if (!mixer->urb) {
2150 kfree(transfer_buffer);
2151 return -ENOMEM;
2152 }
2153 usb_fill_int_urb(mixer->urb, mixer->chip->dev,
2154 usb_rcvintpipe(mixer->chip->dev, epnum),
2155 transfer_buffer, buffer_length,
2156 snd_usb_mixer_interrupt, mixer, ep->bInterval);
2157 usb_submit_urb(mixer->urb, GFP_KERNEL);
2158 return 0;
2159 }
2160
2161 int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif,
2162 int ignore_error)
2163 {
2164 static struct snd_device_ops dev_ops = {
2165 .dev_free = snd_usb_mixer_dev_free
2166 };
2167 struct usb_mixer_interface *mixer;
2168 struct snd_info_entry *entry;
2169 struct usb_host_interface *host_iface;
2170 int err;
2171
2172 strcpy(chip->card->mixername, "USB Mixer");
2173
2174 mixer = kzalloc(sizeof(*mixer), GFP_KERNEL);
2175 if (!mixer)
2176 return -ENOMEM;
2177 mixer->chip = chip;
2178 mixer->ignore_ctl_error = ignore_error;
2179 mixer->id_elems = kcalloc(MAX_ID_ELEMS, sizeof(*mixer->id_elems),
2180 GFP_KERNEL);
2181 if (!mixer->id_elems) {
2182 kfree(mixer);
2183 return -ENOMEM;
2184 }
2185
2186 host_iface = &usb_ifnum_to_if(chip->dev, ctrlif)->altsetting[0];
2187 switch (get_iface_desc(host_iface)->bInterfaceProtocol) {
2188 case UAC_VERSION_1:
2189 default:
2190 mixer->protocol = UAC_VERSION_1;
2191 break;
2192 case UAC_VERSION_2:
2193 mixer->protocol = UAC_VERSION_2;
2194 break;
2195 }
2196
2197 if ((err = snd_usb_mixer_controls(mixer)) < 0 ||
2198 (err = snd_usb_mixer_status_create(mixer)) < 0)
2199 goto _error;
2200
2201 snd_usb_mixer_apply_create_quirk(mixer);
2202
2203 err = snd_device_new(chip->card, SNDRV_DEV_LOWLEVEL, mixer, &dev_ops);
2204 if (err < 0)
2205 goto _error;
2206
2207 if (list_empty(&chip->mixer_list) &&
2208 !snd_card_proc_new(chip->card, "usbmixer", &entry))
2209 snd_info_set_text_ops(entry, chip, snd_usb_mixer_proc_read);
2210
2211 list_add(&mixer->list, &chip->mixer_list);
2212 return 0;
2213
2214 _error:
2215 snd_usb_mixer_free(mixer);
2216 return err;
2217 }
2218
2219 void snd_usb_mixer_disconnect(struct list_head *p)
2220 {
2221 struct usb_mixer_interface *mixer;
2222
2223 mixer = list_entry(p, struct usb_mixer_interface, list);
2224 usb_kill_urb(mixer->urb);
2225 usb_kill_urb(mixer->rc_urb);
2226 }
kernel source for telekom puls (alcatel/mediatek)