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Linux-2.6.12-rc2
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / sound / usb / usbmixer.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 #include <sound/driver.h>
30 #include <linux/bitops.h>
31 #include <linux/init.h>
32 #include <linux/list.h>
33 #include <linux/slab.h>
34 #include <linux/string.h>
35 #include <linux/usb.h>
36 #include <sound/core.h>
37 #include <sound/control.h>
38
39 #include "usbaudio.h"
40
41
42 /*
43 */
44
45 /* ignore error from controls - for debugging */
46 /* #define IGNORE_CTL_ERROR */
47
48 typedef struct usb_mixer_build mixer_build_t;
49 typedef struct usb_audio_term usb_audio_term_t;
50 typedef struct usb_mixer_elem_info usb_mixer_elem_info_t;
51
52
53 struct usb_audio_term {
54 int id;
55 int type;
56 int channels;
57 unsigned int chconfig;
58 int name;
59 };
60
61 struct usbmix_name_map;
62
63 struct usb_mixer_build {
64 snd_usb_audio_t *chip;
65 unsigned char *buffer;
66 unsigned int buflen;
67 unsigned int ctrlif;
68 unsigned short vendor;
69 unsigned short product;
70 DECLARE_BITMAP(unitbitmap, 32*32);
71 usb_audio_term_t oterm;
72 const struct usbmix_name_map *map;
73 };
74
75 struct usb_mixer_elem_info {
76 snd_usb_audio_t *chip;
77 unsigned int ctrlif;
78 unsigned int id;
79 unsigned int control; /* CS or ICN (high byte) */
80 unsigned int cmask; /* channel mask bitmap: 0 = master */
81 int channels;
82 int val_type;
83 int min, max, res;
84 unsigned int initialized: 1;
85 };
86
87
88 enum {
89 USB_FEATURE_NONE = 0,
90 USB_FEATURE_MUTE = 1,
91 USB_FEATURE_VOLUME,
92 USB_FEATURE_BASS,
93 USB_FEATURE_MID,
94 USB_FEATURE_TREBLE,
95 USB_FEATURE_GEQ,
96 USB_FEATURE_AGC,
97 USB_FEATURE_DELAY,
98 USB_FEATURE_BASSBOOST,
99 USB_FEATURE_LOUDNESS
100 };
101
102 enum {
103 USB_MIXER_BOOLEAN,
104 USB_MIXER_INV_BOOLEAN,
105 USB_MIXER_S8,
106 USB_MIXER_U8,
107 USB_MIXER_S16,
108 USB_MIXER_U16,
109 };
110
111 enum {
112 USB_PROC_UPDOWN = 1,
113 USB_PROC_UPDOWN_SWITCH = 1,
114 USB_PROC_UPDOWN_MODE_SEL = 2,
115
116 USB_PROC_PROLOGIC = 2,
117 USB_PROC_PROLOGIC_SWITCH = 1,
118 USB_PROC_PROLOGIC_MODE_SEL = 2,
119
120 USB_PROC_3DENH = 3,
121 USB_PROC_3DENH_SWITCH = 1,
122 USB_PROC_3DENH_SPACE = 2,
123
124 USB_PROC_REVERB = 4,
125 USB_PROC_REVERB_SWITCH = 1,
126 USB_PROC_REVERB_LEVEL = 2,
127 USB_PROC_REVERB_TIME = 3,
128 USB_PROC_REVERB_DELAY = 4,
129
130 USB_PROC_CHORUS = 5,
131 USB_PROC_CHORUS_SWITCH = 1,
132 USB_PROC_CHORUS_LEVEL = 2,
133 USB_PROC_CHORUS_RATE = 3,
134 USB_PROC_CHORUS_DEPTH = 4,
135
136 USB_PROC_DCR = 6,
137 USB_PROC_DCR_SWITCH = 1,
138 USB_PROC_DCR_RATIO = 2,
139 USB_PROC_DCR_MAX_AMP = 3,
140 USB_PROC_DCR_THRESHOLD = 4,
141 USB_PROC_DCR_ATTACK = 5,
142 USB_PROC_DCR_RELEASE = 6,
143 };
144
145 #define MAX_CHANNELS 10 /* max logical channels */
146
147
148 /*
149 * manual mapping of mixer names
150 * if the mixer topology is too complicated and the parsed names are
151 * ambiguous, add the entries in usbmixer_maps.c.
152 */
153 #include "usbmixer_maps.c"
154
155 /* get the mapped name if the unit matches */
156 static int check_mapped_name(mixer_build_t *state, int unitid, int control, char *buf, int buflen)
157 {
158 const struct usbmix_name_map *p;
159
160 if (! state->map)
161 return 0;
162
163 for (p = state->map; p->id; p++) {
164 if (p->id == unitid && p->name &&
165 (! control || ! p->control || control == p->control)) {
166 buflen--;
167 return strlcpy(buf, p->name, buflen);
168 }
169 }
170 return 0;
171 }
172
173 /* check whether the control should be ignored */
174 static int check_ignored_ctl(mixer_build_t *state, int unitid, int control)
175 {
176 const struct usbmix_name_map *p;
177
178 if (! state->map)
179 return 0;
180 for (p = state->map; p->id; p++) {
181 if (p->id == unitid && ! p->name &&
182 (! control || ! p->control || control == p->control)) {
183 // printk("ignored control %d:%d\n", unitid, control);
184 return 1;
185 }
186 }
187 return 0;
188 }
189
190 /*
191 * find an audio control unit with the given unit id
192 */
193 static void *find_audio_control_unit(mixer_build_t *state, unsigned char unit)
194 {
195 unsigned char *p;
196
197 p = NULL;
198 while ((p = snd_usb_find_desc(state->buffer, state->buflen, p,
199 USB_DT_CS_INTERFACE)) != NULL) {
200 if (p[0] >= 4 && p[2] >= INPUT_TERMINAL && p[2] <= EXTENSION_UNIT && p[3] == unit)
201 return p;
202 }
203 return NULL;
204 }
205
206
207 /*
208 * copy a string with the given id
209 */
210 static int snd_usb_copy_string_desc(mixer_build_t *state, int index, char *buf, int maxlen)
211 {
212 int len = usb_string(state->chip->dev, index, buf, maxlen - 1);
213 buf[len] = 0;
214 return len;
215 }
216
217 /*
218 * convert from the byte/word on usb descriptor to the zero-based integer
219 */
220 static int convert_signed_value(usb_mixer_elem_info_t *cval, int val)
221 {
222 switch (cval->val_type) {
223 case USB_MIXER_BOOLEAN:
224 return !!val;
225 case USB_MIXER_INV_BOOLEAN:
226 return !val;
227 case USB_MIXER_U8:
228 val &= 0xff;
229 break;
230 case USB_MIXER_S8:
231 val &= 0xff;
232 if (val >= 0x80)
233 val -= 0x100;
234 break;
235 case USB_MIXER_U16:
236 val &= 0xffff;
237 break;
238 case USB_MIXER_S16:
239 val &= 0xffff;
240 if (val >= 0x8000)
241 val -= 0x10000;
242 break;
243 }
244 return val;
245 }
246
247 /*
248 * convert from the zero-based int to the byte/word for usb descriptor
249 */
250 static int convert_bytes_value(usb_mixer_elem_info_t *cval, int val)
251 {
252 switch (cval->val_type) {
253 case USB_MIXER_BOOLEAN:
254 return !!val;
255 case USB_MIXER_INV_BOOLEAN:
256 return !val;
257 case USB_MIXER_S8:
258 case USB_MIXER_U8:
259 return val & 0xff;
260 case USB_MIXER_S16:
261 case USB_MIXER_U16:
262 return val & 0xffff;
263 }
264 return 0; /* not reached */
265 }
266
267 static int get_relative_value(usb_mixer_elem_info_t *cval, int val)
268 {
269 if (! cval->res)
270 cval->res = 1;
271 if (val < cval->min)
272 return 0;
273 else if (val > cval->max)
274 return (cval->max - cval->min) / cval->res;
275 else
276 return (val - cval->min) / cval->res;
277 }
278
279 static int get_abs_value(usb_mixer_elem_info_t *cval, int val)
280 {
281 if (val < 0)
282 return cval->min;
283 if (! cval->res)
284 cval->res = 1;
285 val *= cval->res;
286 val += cval->min;
287 if (val > cval->max)
288 return cval->max;
289 return val;
290 }
291
292
293 /*
294 * retrieve a mixer value
295 */
296
297 static int get_ctl_value(usb_mixer_elem_info_t *cval, int request, int validx, int *value_ret)
298 {
299 unsigned char buf[2];
300 int val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1;
301 int timeout = 10;
302
303 while (timeout-- > 0) {
304 if (snd_usb_ctl_msg(cval->chip->dev, usb_rcvctrlpipe(cval->chip->dev, 0),
305 request,
306 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
307 validx, cval->ctrlif | (cval->id << 8),
308 buf, val_len, 100) >= 0) {
309 *value_ret = convert_signed_value(cval, snd_usb_combine_bytes(buf, val_len));
310 return 0;
311 }
312 }
313 snd_printdd(KERN_ERR "cannot get ctl value: req = 0x%x, wValue = 0x%x, wIndex = 0x%x, type = %d\n", request, validx, cval->ctrlif | (cval->id << 8), cval->val_type);
314 return -EINVAL;
315 }
316
317 static int get_cur_ctl_value(usb_mixer_elem_info_t *cval, int validx, int *value)
318 {
319 return get_ctl_value(cval, GET_CUR, validx, value);
320 }
321
322 /* channel = 0: master, 1 = first channel */
323 inline static int get_cur_mix_value(usb_mixer_elem_info_t *cval, int channel, int *value)
324 {
325 return get_ctl_value(cval, GET_CUR, (cval->control << 8) | channel, value);
326 }
327
328 /*
329 * set a mixer value
330 */
331
332 static int set_ctl_value(usb_mixer_elem_info_t *cval, int request, int validx, int value_set)
333 {
334 unsigned char buf[2];
335 int val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1;
336 int timeout = 10;
337
338 value_set = convert_bytes_value(cval, value_set);
339 buf[0] = value_set & 0xff;
340 buf[1] = (value_set >> 8) & 0xff;
341 while (timeout -- > 0)
342 if (snd_usb_ctl_msg(cval->chip->dev, usb_sndctrlpipe(cval->chip->dev, 0),
343 request,
344 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
345 validx, cval->ctrlif | (cval->id << 8),
346 buf, val_len, 100) >= 0)
347 return 0;
348 snd_printdd(KERN_ERR "cannot set ctl value: req = 0x%x, wValue = 0x%x, wIndex = 0x%x, type = %d, data = 0x%x/0x%x\n", request, validx, cval->ctrlif | (cval->id << 8), cval->val_type, buf[0], buf[1]);
349 return -EINVAL;
350 }
351
352 static int set_cur_ctl_value(usb_mixer_elem_info_t *cval, int validx, int value)
353 {
354 return set_ctl_value(cval, SET_CUR, validx, value);
355 }
356
357 inline static int set_cur_mix_value(usb_mixer_elem_info_t *cval, int channel, int value)
358 {
359 return set_ctl_value(cval, SET_CUR, (cval->control << 8) | channel, value);
360 }
361
362
363 /*
364 * parser routines begin here...
365 */
366
367 static int parse_audio_unit(mixer_build_t *state, int unitid);
368
369
370 /*
371 * check if the input/output channel routing is enabled on the given bitmap.
372 * used for mixer unit parser
373 */
374 static int check_matrix_bitmap(unsigned char *bmap, int ich, int och, int num_outs)
375 {
376 int idx = ich * num_outs + och;
377 return bmap[idx >> 3] & (0x80 >> (idx & 7));
378 }
379
380
381 /*
382 * add an alsa control element
383 * search and increment the index until an empty slot is found.
384 *
385 * if failed, give up and free the control instance.
386 */
387
388 static int add_control_to_empty(snd_card_t *card, snd_kcontrol_t *kctl)
389 {
390 int err;
391 while (snd_ctl_find_id(card, &kctl->id))
392 kctl->id.index++;
393 if ((err = snd_ctl_add(card, kctl)) < 0) {
394 snd_printd(KERN_ERR "cannot add control (err = %d)\n", err);
395 snd_ctl_free_one(kctl);
396 }
397 return err;
398 }
399
400
401 /*
402 * get a terminal name string
403 */
404
405 static struct iterm_name_combo {
406 int type;
407 char *name;
408 } iterm_names[] = {
409 { 0x0300, "Output" },
410 { 0x0301, "Speaker" },
411 { 0x0302, "Headphone" },
412 { 0x0303, "HMD Audio" },
413 { 0x0304, "Desktop Speaker" },
414 { 0x0305, "Room Speaker" },
415 { 0x0306, "Com Speaker" },
416 { 0x0307, "LFE" },
417 { 0x0600, "External In" },
418 { 0x0601, "Analog In" },
419 { 0x0602, "Digital In" },
420 { 0x0603, "Line" },
421 { 0x0604, "Legacy In" },
422 { 0x0605, "IEC958 In" },
423 { 0x0606, "1394 DA Stream" },
424 { 0x0607, "1394 DV Stream" },
425 { 0x0700, "Embedded" },
426 { 0x0701, "Noise Source" },
427 { 0x0702, "Equalization Noise" },
428 { 0x0703, "CD" },
429 { 0x0704, "DAT" },
430 { 0x0705, "DCC" },
431 { 0x0706, "MiniDisk" },
432 { 0x0707, "Analog Tape" },
433 { 0x0708, "Phonograph" },
434 { 0x0709, "VCR Audio" },
435 { 0x070a, "Video Disk Audio" },
436 { 0x070b, "DVD Audio" },
437 { 0x070c, "TV Tuner Audio" },
438 { 0x070d, "Satellite Rec Audio" },
439 { 0x070e, "Cable Tuner Audio" },
440 { 0x070f, "DSS Audio" },
441 { 0x0710, "Radio Receiver" },
442 { 0x0711, "Radio Transmitter" },
443 { 0x0712, "Multi-Track Recorder" },
444 { 0x0713, "Synthesizer" },
445 { 0 },
446 };
447
448 static int get_term_name(mixer_build_t *state, usb_audio_term_t *iterm,
449 unsigned char *name, int maxlen, int term_only)
450 {
451 struct iterm_name_combo *names;
452
453 if (iterm->name)
454 return snd_usb_copy_string_desc(state, iterm->name, name, maxlen);
455
456 /* virtual type - not a real terminal */
457 if (iterm->type >> 16) {
458 if (term_only)
459 return 0;
460 switch (iterm->type >> 16) {
461 case SELECTOR_UNIT:
462 strcpy(name, "Selector"); return 8;
463 case PROCESSING_UNIT:
464 strcpy(name, "Process Unit"); return 12;
465 case EXTENSION_UNIT:
466 strcpy(name, "Ext Unit"); return 8;
467 case MIXER_UNIT:
468 strcpy(name, "Mixer"); return 5;
469 default:
470 return sprintf(name, "Unit %d", iterm->id);
471 }
472 }
473
474 switch (iterm->type & 0xff00) {
475 case 0x0100:
476 strcpy(name, "PCM"); return 3;
477 case 0x0200:
478 strcpy(name, "Mic"); return 3;
479 case 0x0400:
480 strcpy(name, "Headset"); return 7;
481 case 0x0500:
482 strcpy(name, "Phone"); return 5;
483 }
484
485 for (names = iterm_names; names->type; names++)
486 if (names->type == iterm->type) {
487 strcpy(name, names->name);
488 return strlen(names->name);
489 }
490 return 0;
491 }
492
493
494 /*
495 * parse the source unit recursively until it reaches to a terminal
496 * or a branched unit.
497 */
498 static int check_input_term(mixer_build_t *state, int id, usb_audio_term_t *term)
499 {
500 unsigned char *p1;
501
502 memset(term, 0, sizeof(*term));
503 while ((p1 = find_audio_control_unit(state, id)) != NULL) {
504 term->id = id;
505 switch (p1[2]) {
506 case INPUT_TERMINAL:
507 term->type = combine_word(p1 + 4);
508 term->channels = p1[7];
509 term->chconfig = combine_word(p1 + 8);
510 term->name = p1[11];
511 return 0;
512 case FEATURE_UNIT:
513 id = p1[4];
514 break; /* continue to parse */
515 case MIXER_UNIT:
516 term->type = p1[2] << 16; /* virtual type */
517 term->channels = p1[5 + p1[4]];
518 term->chconfig = combine_word(p1 + 6 + p1[4]);
519 term->name = p1[p1[0] - 1];
520 return 0;
521 case SELECTOR_UNIT:
522 /* call recursively to retrieve the channel info */
523 if (check_input_term(state, p1[5], term) < 0)
524 return -ENODEV;
525 term->type = p1[2] << 16; /* virtual type */
526 term->id = id;
527 term->name = p1[9 + p1[0] - 1];
528 return 0;
529 case PROCESSING_UNIT:
530 case EXTENSION_UNIT:
531 if (p1[6] == 1) {
532 id = p1[7];
533 break; /* continue to parse */
534 }
535 term->type = p1[2] << 16; /* virtual type */
536 term->channels = p1[7 + p1[6]];
537 term->chconfig = combine_word(p1 + 8 + p1[6]);
538 term->name = p1[12 + p1[6] + p1[11 + p1[6]]];
539 return 0;
540 default:
541 return -ENODEV;
542 }
543 }
544 return -ENODEV;
545 }
546
547
548 /*
549 * Feature Unit
550 */
551
552 /* feature unit control information */
553 struct usb_feature_control_info {
554 const char *name;
555 unsigned int type; /* control type (mute, volume, etc.) */
556 };
557
558 static struct usb_feature_control_info audio_feature_info[] = {
559 { "Mute", USB_MIXER_INV_BOOLEAN },
560 { "Volume", USB_MIXER_S16 },
561 { "Tone Control - Bass", USB_MIXER_S8 },
562 { "Tone Control - Mid", USB_MIXER_S8 },
563 { "Tone Control - Treble", USB_MIXER_S8 },
564 { "Graphic Equalizer", USB_MIXER_S8 }, /* FIXME: not implemeted yet */
565 { "Auto Gain Control", USB_MIXER_BOOLEAN },
566 { "Delay Control", USB_MIXER_U16 },
567 { "Bass Boost", USB_MIXER_BOOLEAN },
568 { "Loudness", USB_MIXER_BOOLEAN },
569 };
570
571
572 /* private_free callback */
573 static void usb_mixer_elem_free(snd_kcontrol_t *kctl)
574 {
575 if (kctl->private_data) {
576 kfree(kctl->private_data);
577 kctl->private_data = NULL;
578 }
579 }
580
581
582 /*
583 * interface to ALSA control for feature/mixer units
584 */
585
586 /*
587 * retrieve the minimum and maximum values for the specified control
588 */
589 static int get_min_max(usb_mixer_elem_info_t *cval, int default_min)
590 {
591 /* for failsafe */
592 cval->min = default_min;
593 cval->max = cval->min + 1;
594 cval->res = 1;
595
596 if (cval->val_type == USB_MIXER_BOOLEAN ||
597 cval->val_type == USB_MIXER_INV_BOOLEAN) {
598 cval->initialized = 1;
599 } else {
600 int minchn = 0;
601 if (cval->cmask) {
602 int i;
603 for (i = 0; i < MAX_CHANNELS; i++)
604 if (cval->cmask & (1 << i)) {
605 minchn = i + 1;
606 break;
607 }
608 }
609 if (get_ctl_value(cval, GET_MAX, (cval->control << 8) | minchn, &cval->max) < 0 ||
610 get_ctl_value(cval, GET_MIN, (cval->control << 8) | minchn, &cval->min) < 0) {
611 snd_printd(KERN_ERR "%d:%d: cannot get min/max values for control %d (id %d)\n", cval->id, cval->ctrlif, cval->control, cval->id);
612 return -EINVAL;
613 }
614 if (get_ctl_value(cval, GET_RES, (cval->control << 8) | minchn, &cval->res) < 0) {
615 cval->res = 1;
616 } else {
617 int last_valid_res = cval->res;
618
619 while (cval->res > 1) {
620 if (set_ctl_value(cval, SET_RES, (cval->control << 8) | minchn, cval->res / 2) < 0)
621 break;
622 cval->res /= 2;
623 }
624 if (get_ctl_value(cval, GET_RES, (cval->control << 8) | minchn, &cval->res) < 0)
625 cval->res = last_valid_res;
626 }
627 if (cval->res == 0)
628 cval->res = 1;
629 cval->initialized = 1;
630 }
631 return 0;
632 }
633
634
635 /* get a feature/mixer unit info */
636 static int mixer_ctl_feature_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *uinfo)
637 {
638 usb_mixer_elem_info_t *cval = kcontrol->private_data;
639
640 if (cval->val_type == USB_MIXER_BOOLEAN ||
641 cval->val_type == USB_MIXER_INV_BOOLEAN)
642 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
643 else
644 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
645 uinfo->count = cval->channels;
646 if (cval->val_type == USB_MIXER_BOOLEAN ||
647 cval->val_type == USB_MIXER_INV_BOOLEAN) {
648 uinfo->value.integer.min = 0;
649 uinfo->value.integer.max = 1;
650 } else {
651 if (! cval->initialized)
652 get_min_max(cval, 0);
653 uinfo->value.integer.min = 0;
654 uinfo->value.integer.max = (cval->max - cval->min) / cval->res;
655 }
656 return 0;
657 }
658
659 /* get the current value from feature/mixer unit */
660 static int mixer_ctl_feature_get(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
661 {
662 usb_mixer_elem_info_t *cval = kcontrol->private_data;
663 int c, cnt, val, err;
664
665 if (cval->cmask) {
666 cnt = 0;
667 for (c = 0; c < MAX_CHANNELS; c++) {
668 if (cval->cmask & (1 << c)) {
669 err = get_cur_mix_value(cval, c + 1, &val);
670 if (err < 0) {
671 if (cval->chip->ignore_ctl_error) {
672 ucontrol->value.integer.value[0] = cval->min;
673 return 0;
674 }
675 snd_printd(KERN_ERR "cannot get current value for control %d ch %d: err = %d\n", cval->control, c + 1, err);
676 return err;
677 }
678 val = get_relative_value(cval, val);
679 ucontrol->value.integer.value[cnt] = val;
680 cnt++;
681 }
682 }
683 } else {
684 /* master channel */
685 err = get_cur_mix_value(cval, 0, &val);
686 if (err < 0) {
687 if (cval->chip->ignore_ctl_error) {
688 ucontrol->value.integer.value[0] = cval->min;
689 return 0;
690 }
691 snd_printd(KERN_ERR "cannot get current value for control %d master ch: err = %d\n", cval->control, err);
692 return err;
693 }
694 val = get_relative_value(cval, val);
695 ucontrol->value.integer.value[0] = val;
696 }
697 return 0;
698 }
699
700 /* put the current value to feature/mixer unit */
701 static int mixer_ctl_feature_put(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
702 {
703 usb_mixer_elem_info_t *cval = kcontrol->private_data;
704 int c, cnt, val, oval, err;
705 int changed = 0;
706
707 if (cval->cmask) {
708 cnt = 0;
709 for (c = 0; c < MAX_CHANNELS; c++) {
710 if (cval->cmask & (1 << c)) {
711 err = get_cur_mix_value(cval, c + 1, &oval);
712 if (err < 0) {
713 if (cval->chip->ignore_ctl_error)
714 return 0;
715 return err;
716 }
717 val = ucontrol->value.integer.value[cnt];
718 val = get_abs_value(cval, val);
719 if (oval != val) {
720 set_cur_mix_value(cval, c + 1, val);
721 changed = 1;
722 }
723 get_cur_mix_value(cval, c + 1, &val);
724 cnt++;
725 }
726 }
727 } else {
728 /* master channel */
729 err = get_cur_mix_value(cval, 0, &oval);
730 if (err < 0 && cval->chip->ignore_ctl_error)
731 return 0;
732 if (err < 0)
733 return err;
734 val = ucontrol->value.integer.value[0];
735 val = get_abs_value(cval, val);
736 if (val != oval) {
737 set_cur_mix_value(cval, 0, val);
738 changed = 1;
739 }
740 }
741 return changed;
742 }
743
744 static snd_kcontrol_new_t usb_feature_unit_ctl = {
745 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
746 .name = "", /* will be filled later manually */
747 .info = mixer_ctl_feature_info,
748 .get = mixer_ctl_feature_get,
749 .put = mixer_ctl_feature_put,
750 };
751
752
753 /*
754 * build a feature control
755 */
756
757 static void build_feature_ctl(mixer_build_t *state, unsigned char *desc,
758 unsigned int ctl_mask, int control,
759 usb_audio_term_t *iterm, int unitid)
760 {
761 unsigned int len = 0;
762 int mapped_name = 0;
763 int nameid = desc[desc[0] - 1];
764 snd_kcontrol_t *kctl;
765 usb_mixer_elem_info_t *cval;
766
767 control++; /* change from zero-based to 1-based value */
768
769 if (control == USB_FEATURE_GEQ) {
770 /* FIXME: not supported yet */
771 return;
772 }
773
774 if (check_ignored_ctl(state, unitid, control))
775 return;
776
777 cval = kcalloc(1, sizeof(*cval), GFP_KERNEL);
778 if (! cval) {
779 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
780 return;
781 }
782 cval->chip = state->chip;
783 cval->ctrlif = state->ctrlif;
784 cval->id = unitid;
785 cval->control = control;
786 cval->cmask = ctl_mask;
787 cval->val_type = audio_feature_info[control-1].type;
788 if (ctl_mask == 0)
789 cval->channels = 1; /* master channel */
790 else {
791 int i, c = 0;
792 for (i = 0; i < 16; i++)
793 if (ctl_mask & (1 << i))
794 c++;
795 cval->channels = c;
796 }
797
798 /* get min/max values */
799 get_min_max(cval, 0);
800
801 kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval);
802 if (! kctl) {
803 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
804 kfree(cval);
805 return;
806 }
807 kctl->private_free = usb_mixer_elem_free;
808
809 len = check_mapped_name(state, unitid, control, kctl->id.name, sizeof(kctl->id.name));
810 mapped_name = len != 0;
811 if (! len && nameid)
812 len = snd_usb_copy_string_desc(state, nameid, kctl->id.name, sizeof(kctl->id.name));
813
814 switch (control) {
815 case USB_FEATURE_MUTE:
816 case USB_FEATURE_VOLUME:
817 /* determine the control name. the rule is:
818 * - if a name id is given in descriptor, use it.
819 * - if the connected input can be determined, then use the name
820 * of terminal type.
821 * - if the connected output can be determined, use it.
822 * - otherwise, anonymous name.
823 */
824 if (! len) {
825 len = get_term_name(state, iterm, kctl->id.name, sizeof(kctl->id.name), 1);
826 if (! len)
827 len = get_term_name(state, &state->oterm, kctl->id.name, sizeof(kctl->id.name), 1);
828 if (! len)
829 len = snprintf(kctl->id.name, sizeof(kctl->id.name),
830 "Feature %d", unitid);
831 }
832 /* determine the stream direction:
833 * if the connected output is USB stream, then it's likely a
834 * capture stream. otherwise it should be playback (hopefully :)
835 */
836 if (! mapped_name && ! (state->oterm.type >> 16)) {
837 if ((state->oterm.type & 0xff00) == 0x0100) {
838 len = strlcat(kctl->id.name, " Capture", sizeof(kctl->id.name));
839 } else {
840 len = strlcat(kctl->id.name + len, " Playback", sizeof(kctl->id.name));
841 }
842 }
843 strlcat(kctl->id.name + len, control == USB_FEATURE_MUTE ? " Switch" : " Volume",
844 sizeof(kctl->id.name));
845 break;
846
847 default:
848 if (! len)
849 strlcpy(kctl->id.name, audio_feature_info[control-1].name,
850 sizeof(kctl->id.name));
851 break;
852 }
853
854 /* quirk for UDA1321/N101 */
855 /* note that detection between firmware 2.1.1.7 (N101) and later 2.1.1.21 */
856 /* is not very clear from datasheets */
857 /* I hope that the min value is -15360 for newer firmware --jk */
858 if (((state->vendor == 0x471 && (state->product == 0x104 || state->product == 0x105 || state->product == 0x101)) ||
859 (state->vendor == 0x672 && state->product == 0x1041)) && !strcmp(kctl->id.name, "PCM Playback Volume") &&
860 cval->min == -15616) {
861 snd_printk("USB Audio: using volume control quirk for the UDA1321/N101 chip\n");
862 cval->max = -256;
863 }
864
865 snd_printdd(KERN_INFO "[%d] FU [%s] ch = %d, val = %d/%d/%d\n",
866 cval->id, kctl->id.name, cval->channels, cval->min, cval->max, cval->res);
867 add_control_to_empty(state->chip->card, kctl);
868 }
869
870
871
872 /*
873 * parse a feature unit
874 *
875 * most of controlls are defined here.
876 */
877 static int parse_audio_feature_unit(mixer_build_t *state, int unitid, unsigned char *ftr)
878 {
879 int channels, i, j;
880 usb_audio_term_t iterm;
881 unsigned int master_bits, first_ch_bits;
882 int err, csize;
883
884 if (ftr[0] < 7 || ! (csize = ftr[5]) || ftr[0] < 7 + csize) {
885 snd_printk(KERN_ERR "usbaudio: unit %u: invalid FEATURE_UNIT descriptor\n", unitid);
886 return -EINVAL;
887 }
888
889 /* parse the source unit */
890 if ((err = parse_audio_unit(state, ftr[4])) < 0)
891 return err;
892
893 /* determine the input source type and name */
894 if (check_input_term(state, ftr[4], &iterm) < 0)
895 return -EINVAL;
896
897 channels = (ftr[0] - 7) / csize - 1;
898
899 master_bits = snd_usb_combine_bytes(ftr + 6, csize);
900 if (channels > 0)
901 first_ch_bits = snd_usb_combine_bytes(ftr + 6 + csize, csize);
902 else
903 first_ch_bits = 0;
904 /* check all control types */
905 for (i = 0; i < 10; i++) {
906 unsigned int ch_bits = 0;
907 for (j = 0; j < channels; j++) {
908 unsigned int mask = snd_usb_combine_bytes(ftr + 6 + csize * (j+1), csize);
909 if (mask & (1 << i))
910 ch_bits |= (1 << j);
911 }
912 if (ch_bits & 1) /* the first channel must be set (for ease of programming) */
913 build_feature_ctl(state, ftr, ch_bits, i, &iterm, unitid);
914 if (master_bits & (1 << i))
915 build_feature_ctl(state, ftr, 0, i, &iterm, unitid);
916 }
917
918 return 0;
919 }
920
921
922 /*
923 * Mixer Unit
924 */
925
926 /*
927 * build a mixer unit control
928 *
929 * the callbacks are identical with feature unit.
930 * input channel number (zero based) is given in control field instead.
931 */
932
933 static void build_mixer_unit_ctl(mixer_build_t *state, unsigned char *desc,
934 int in_pin, int in_ch, int unitid,
935 usb_audio_term_t *iterm)
936 {
937 usb_mixer_elem_info_t *cval;
938 unsigned int input_pins = desc[4];
939 unsigned int num_outs = desc[5 + input_pins];
940 unsigned int i, len;
941 snd_kcontrol_t *kctl;
942
943 if (check_ignored_ctl(state, unitid, 0))
944 return;
945
946 cval = kcalloc(1, sizeof(*cval), GFP_KERNEL);
947 if (! cval)
948 return;
949
950 cval->chip = state->chip;
951 cval->ctrlif = state->ctrlif;
952 cval->id = unitid;
953 cval->control = in_ch + 1; /* based on 1 */
954 cval->val_type = USB_MIXER_S16;
955 for (i = 0; i < num_outs; i++) {
956 if (check_matrix_bitmap(desc + 9 + input_pins, in_ch, i, num_outs)) {
957 cval->cmask |= (1 << i);
958 cval->channels++;
959 }
960 }
961
962 /* get min/max values */
963 get_min_max(cval, 0);
964
965 kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval);
966 if (! kctl) {
967 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
968 kfree(cval);
969 return;
970 }
971 kctl->private_free = usb_mixer_elem_free;
972
973 len = check_mapped_name(state, unitid, 0, kctl->id.name, sizeof(kctl->id.name));
974 if (! len)
975 len = get_term_name(state, iterm, kctl->id.name, sizeof(kctl->id.name), 0);
976 if (! len)
977 len = sprintf(kctl->id.name, "Mixer Source %d", in_ch + 1);
978 strlcat(kctl->id.name + len, " Volume", sizeof(kctl->id.name));
979
980 snd_printdd(KERN_INFO "[%d] MU [%s] ch = %d, val = %d/%d\n",
981 cval->id, kctl->id.name, cval->channels, cval->min, cval->max);
982 add_control_to_empty(state->chip->card, kctl);
983 }
984
985
986 /*
987 * parse a mixer unit
988 */
989 static int parse_audio_mixer_unit(mixer_build_t *state, int unitid, unsigned char *desc)
990 {
991 usb_audio_term_t iterm;
992 int input_pins, num_ins, num_outs;
993 int pin, ich, err;
994
995 if (desc[0] < 11 || ! (input_pins = desc[4]) || ! (num_outs = desc[5 + input_pins])) {
996 snd_printk(KERN_ERR "invalid MIXER UNIT descriptor %d\n", unitid);
997 return -EINVAL;
998 }
999 /* no bmControls field (e.g. Maya44) -> ignore */
1000 if (desc[0] <= 10 + input_pins) {
1001 snd_printdd(KERN_INFO "MU %d has no bmControls field\n", unitid);
1002 return 0;
1003 }
1004
1005 num_ins = 0;
1006 ich = 0;
1007 for (pin = 0; pin < input_pins; pin++) {
1008 err = parse_audio_unit(state, desc[5 + pin]);
1009 if (err < 0)
1010 return err;
1011 err = check_input_term(state, desc[5 + pin], &iterm);
1012 if (err < 0)
1013 return err;
1014 num_ins += iterm.channels;
1015 for (; ich < num_ins; ++ich) {
1016 int och, ich_has_controls = 0;
1017
1018 for (och = 0; och < num_outs; ++och) {
1019 if (check_matrix_bitmap(desc + 9 + input_pins,
1020 ich, och, num_outs)) {
1021 ich_has_controls = 1;
1022 break;
1023 }
1024 }
1025 if (ich_has_controls)
1026 build_mixer_unit_ctl(state, desc, pin, ich,
1027 unitid, &iterm);
1028 }
1029 }
1030 return 0;
1031 }
1032
1033
1034 /*
1035 * Processing Unit / Extension Unit
1036 */
1037
1038 /* get callback for processing/extension unit */
1039 static int mixer_ctl_procunit_get(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
1040 {
1041 usb_mixer_elem_info_t *cval = kcontrol->private_data;
1042 int err, val;
1043
1044 err = get_cur_ctl_value(cval, cval->control << 8, &val);
1045 if (err < 0 && cval->chip->ignore_ctl_error) {
1046 ucontrol->value.integer.value[0] = cval->min;
1047 return 0;
1048 }
1049 if (err < 0)
1050 return err;
1051 val = get_relative_value(cval, val);
1052 ucontrol->value.integer.value[0] = val;
1053 return 0;
1054 }
1055
1056 /* put callback for processing/extension unit */
1057 static int mixer_ctl_procunit_put(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
1058 {
1059 usb_mixer_elem_info_t *cval = kcontrol->private_data;
1060 int val, oval, err;
1061
1062 err = get_cur_ctl_value(cval, cval->control << 8, &oval);
1063 if (err < 0) {
1064 if (cval->chip->ignore_ctl_error)
1065 return 0;
1066 return err;
1067 }
1068 val = ucontrol->value.integer.value[0];
1069 val = get_abs_value(cval, val);
1070 if (val != oval) {
1071 set_cur_ctl_value(cval, cval->control << 8, val);
1072 return 1;
1073 }
1074 return 0;
1075 }
1076
1077 /* alsa control interface for processing/extension unit */
1078 static snd_kcontrol_new_t mixer_procunit_ctl = {
1079 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1080 .name = "", /* will be filled later */
1081 .info = mixer_ctl_feature_info,
1082 .get = mixer_ctl_procunit_get,
1083 .put = mixer_ctl_procunit_put,
1084 };
1085
1086
1087 /*
1088 * predefined data for processing units
1089 */
1090 struct procunit_value_info {
1091 int control;
1092 char *suffix;
1093 int val_type;
1094 int min_value;
1095 };
1096
1097 struct procunit_info {
1098 int type;
1099 char *name;
1100 struct procunit_value_info *values;
1101 };
1102
1103 static struct procunit_value_info updown_proc_info[] = {
1104 { USB_PROC_UPDOWN_SWITCH, "Switch", USB_MIXER_BOOLEAN },
1105 { USB_PROC_UPDOWN_MODE_SEL, "Mode Select", USB_MIXER_U8, 1 },
1106 { 0 }
1107 };
1108 static struct procunit_value_info prologic_proc_info[] = {
1109 { USB_PROC_PROLOGIC_SWITCH, "Switch", USB_MIXER_BOOLEAN },
1110 { USB_PROC_PROLOGIC_MODE_SEL, "Mode Select", USB_MIXER_U8, 1 },
1111 { 0 }
1112 };
1113 static struct procunit_value_info threed_enh_proc_info[] = {
1114 { USB_PROC_3DENH_SWITCH, "Switch", USB_MIXER_BOOLEAN },
1115 { USB_PROC_3DENH_SPACE, "Spaciousness", USB_MIXER_U8 },
1116 { 0 }
1117 };
1118 static struct procunit_value_info reverb_proc_info[] = {
1119 { USB_PROC_REVERB_SWITCH, "Switch", USB_MIXER_BOOLEAN },
1120 { USB_PROC_REVERB_LEVEL, "Level", USB_MIXER_U8 },
1121 { USB_PROC_REVERB_TIME, "Time", USB_MIXER_U16 },
1122 { USB_PROC_REVERB_DELAY, "Delay", USB_MIXER_U8 },
1123 { 0 }
1124 };
1125 static struct procunit_value_info chorus_proc_info[] = {
1126 { USB_PROC_CHORUS_SWITCH, "Switch", USB_MIXER_BOOLEAN },
1127 { USB_PROC_CHORUS_LEVEL, "Level", USB_MIXER_U8 },
1128 { USB_PROC_CHORUS_RATE, "Rate", USB_MIXER_U16 },
1129 { USB_PROC_CHORUS_DEPTH, "Depth", USB_MIXER_U16 },
1130 { 0 }
1131 };
1132 static struct procunit_value_info dcr_proc_info[] = {
1133 { USB_PROC_DCR_SWITCH, "Switch", USB_MIXER_BOOLEAN },
1134 { USB_PROC_DCR_RATIO, "Ratio", USB_MIXER_U16 },
1135 { USB_PROC_DCR_MAX_AMP, "Max Amp", USB_MIXER_S16 },
1136 { USB_PROC_DCR_THRESHOLD, "Threshold", USB_MIXER_S16 },
1137 { USB_PROC_DCR_ATTACK, "Attack Time", USB_MIXER_U16 },
1138 { USB_PROC_DCR_RELEASE, "Release Time", USB_MIXER_U16 },
1139 { 0 }
1140 };
1141
1142 static struct procunit_info procunits[] = {
1143 { USB_PROC_UPDOWN, "Up Down", updown_proc_info },
1144 { USB_PROC_PROLOGIC, "Dolby Prologic", prologic_proc_info },
1145 { USB_PROC_3DENH, "3D Stereo Extender", threed_enh_proc_info },
1146 { USB_PROC_REVERB, "Reverb", reverb_proc_info },
1147 { USB_PROC_CHORUS, "Chorus", chorus_proc_info },
1148 { USB_PROC_DCR, "DCR", dcr_proc_info },
1149 { 0 },
1150 };
1151
1152 /*
1153 * build a processing/extension unit
1154 */
1155 static int build_audio_procunit(mixer_build_t *state, int unitid, unsigned char *dsc, struct procunit_info *list, char *name)
1156 {
1157 int num_ins = dsc[6];
1158 usb_mixer_elem_info_t *cval;
1159 snd_kcontrol_t *kctl;
1160 int i, err, nameid, type, len;
1161 struct procunit_info *info;
1162 struct procunit_value_info *valinfo;
1163 static struct procunit_value_info default_value_info[] = {
1164 { 0x01, "Switch", USB_MIXER_BOOLEAN },
1165 { 0 }
1166 };
1167 static struct procunit_info default_info = {
1168 0, NULL, default_value_info
1169 };
1170
1171 if (dsc[0] < 13 || dsc[0] < 13 + num_ins || dsc[0] < num_ins + dsc[11 + num_ins]) {
1172 snd_printk(KERN_ERR "invalid %s descriptor (id %d)\n", name, unitid);
1173 return -EINVAL;
1174 }
1175
1176 for (i = 0; i < num_ins; i++) {
1177 if ((err = parse_audio_unit(state, dsc[7 + i])) < 0)
1178 return err;
1179 }
1180
1181 type = combine_word(&dsc[4]);
1182 if (! type)
1183 return 0; /* undefined? */
1184
1185 for (info = list; info && info->type; info++)
1186 if (info->type == type)
1187 break;
1188 if (! info || ! info->type)
1189 info = &default_info;
1190
1191 for (valinfo = info->values; valinfo->control; valinfo++) {
1192 /* FIXME: bitmap might be longer than 8bit */
1193 if (! (dsc[12 + num_ins] & (1 << (valinfo->control - 1))))
1194 continue;
1195 if (check_ignored_ctl(state, unitid, valinfo->control))
1196 continue;
1197 cval = kcalloc(1, sizeof(*cval), GFP_KERNEL);
1198 if (! cval) {
1199 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
1200 return -ENOMEM;
1201 }
1202 cval->chip = state->chip;
1203 cval->ctrlif = state->ctrlif;
1204 cval->id = unitid;
1205 cval->control = valinfo->control;
1206 cval->val_type = valinfo->val_type;
1207 cval->channels = 1;
1208
1209 /* get min/max values */
1210 if (type == USB_PROC_UPDOWN && cval->control == USB_PROC_UPDOWN_MODE_SEL) {
1211 /* FIXME: hard-coded */
1212 cval->min = 1;
1213 cval->max = dsc[15];
1214 cval->res = 1;
1215 cval->initialized = 1;
1216 } else
1217 get_min_max(cval, valinfo->min_value);
1218
1219 kctl = snd_ctl_new1(&mixer_procunit_ctl, cval);
1220 if (! kctl) {
1221 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
1222 kfree(cval);
1223 return -ENOMEM;
1224 }
1225 kctl->private_free = usb_mixer_elem_free;
1226
1227 if (check_mapped_name(state, unitid, cval->control, kctl->id.name, sizeof(kctl->id.name)))
1228 ;
1229 else if (info->name)
1230 strlcpy(kctl->id.name, info->name, sizeof(kctl->id.name));
1231 else {
1232 nameid = dsc[12 + num_ins + dsc[11 + num_ins]];
1233 len = 0;
1234 if (nameid)
1235 len = snd_usb_copy_string_desc(state, nameid, kctl->id.name, sizeof(kctl->id.name));
1236 if (! len)
1237 strlcpy(kctl->id.name, name, sizeof(kctl->id.name));
1238 }
1239 strlcat(kctl->id.name, " ", sizeof(kctl->id.name));
1240 strlcat(kctl->id.name, valinfo->suffix, sizeof(kctl->id.name));
1241
1242 snd_printdd(KERN_INFO "[%d] PU [%s] ch = %d, val = %d/%d\n",
1243 cval->id, kctl->id.name, cval->channels, cval->min, cval->max);
1244 if ((err = add_control_to_empty(state->chip->card, kctl)) < 0)
1245 return err;
1246 }
1247 return 0;
1248 }
1249
1250
1251 static int parse_audio_processing_unit(mixer_build_t *state, int unitid, unsigned char *desc)
1252 {
1253 return build_audio_procunit(state, unitid, desc, procunits, "Processing Unit");
1254 }
1255
1256 static int parse_audio_extension_unit(mixer_build_t *state, int unitid, unsigned char *desc)
1257 {
1258 return build_audio_procunit(state, unitid, desc, NULL, "Extension Unit");
1259 }
1260
1261
1262 /*
1263 * Selector Unit
1264 */
1265
1266 /* info callback for selector unit
1267 * use an enumerator type for routing
1268 */
1269 static int mixer_ctl_selector_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *uinfo)
1270 {
1271 usb_mixer_elem_info_t *cval = kcontrol->private_data;
1272 char **itemlist = (char **)kcontrol->private_value;
1273
1274 snd_assert(itemlist, return -EINVAL);
1275 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
1276 uinfo->count = 1;
1277 uinfo->value.enumerated.items = cval->max;
1278 if ((int)uinfo->value.enumerated.item >= cval->max)
1279 uinfo->value.enumerated.item = cval->max - 1;
1280 strcpy(uinfo->value.enumerated.name, itemlist[uinfo->value.enumerated.item]);
1281 return 0;
1282 }
1283
1284 /* get callback for selector unit */
1285 static int mixer_ctl_selector_get(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
1286 {
1287 usb_mixer_elem_info_t *cval = kcontrol->private_data;
1288 int val, err;
1289
1290 err = get_cur_ctl_value(cval, 0, &val);
1291 if (err < 0) {
1292 if (cval->chip->ignore_ctl_error) {
1293 ucontrol->value.enumerated.item[0] = 0;
1294 return 0;
1295 }
1296 return err;
1297 }
1298 val = get_relative_value(cval, val);
1299 ucontrol->value.enumerated.item[0] = val;
1300 return 0;
1301 }
1302
1303 /* put callback for selector unit */
1304 static int mixer_ctl_selector_put(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
1305 {
1306 usb_mixer_elem_info_t *cval = kcontrol->private_data;
1307 int val, oval, err;
1308
1309 err = get_cur_ctl_value(cval, 0, &oval);
1310 if (err < 0) {
1311 if (cval->chip->ignore_ctl_error)
1312 return 0;
1313 return err;
1314 }
1315 val = ucontrol->value.enumerated.item[0];
1316 val = get_abs_value(cval, val);
1317 if (val != oval) {
1318 set_cur_ctl_value(cval, 0, val);
1319 return 1;
1320 }
1321 return 0;
1322 }
1323
1324 /* alsa control interface for selector unit */
1325 static snd_kcontrol_new_t mixer_selectunit_ctl = {
1326 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1327 .name = "", /* will be filled later */
1328 .info = mixer_ctl_selector_info,
1329 .get = mixer_ctl_selector_get,
1330 .put = mixer_ctl_selector_put,
1331 };
1332
1333
1334 /* private free callback.
1335 * free both private_data and private_value
1336 */
1337 static void usb_mixer_selector_elem_free(snd_kcontrol_t *kctl)
1338 {
1339 int i, num_ins = 0;
1340
1341 if (kctl->private_data) {
1342 usb_mixer_elem_info_t *cval = kctl->private_data;
1343 num_ins = cval->max;
1344 kfree(cval);
1345 kctl->private_data = NULL;
1346 }
1347 if (kctl->private_value) {
1348 char **itemlist = (char **)kctl->private_value;
1349 for (i = 0; i < num_ins; i++)
1350 kfree(itemlist[i]);
1351 kfree(itemlist);
1352 kctl->private_value = 0;
1353 }
1354 }
1355
1356 /*
1357 * parse a selector unit
1358 */
1359 static int parse_audio_selector_unit(mixer_build_t *state, int unitid, unsigned char *desc)
1360 {
1361 unsigned int num_ins = desc[4];
1362 unsigned int i, nameid, len;
1363 int err;
1364 usb_mixer_elem_info_t *cval;
1365 snd_kcontrol_t *kctl;
1366 char **namelist;
1367
1368 if (! num_ins || desc[0] < 6 + num_ins) {
1369 snd_printk(KERN_ERR "invalid SELECTOR UNIT descriptor %d\n", unitid);
1370 return -EINVAL;
1371 }
1372
1373 for (i = 0; i < num_ins; i++) {
1374 if ((err = parse_audio_unit(state, desc[5 + i])) < 0)
1375 return err;
1376 }
1377
1378 if (num_ins == 1) /* only one ? nonsense! */
1379 return 0;
1380
1381 if (check_ignored_ctl(state, unitid, 0))
1382 return 0;
1383
1384 cval = kcalloc(1, sizeof(*cval), GFP_KERNEL);
1385 if (! cval) {
1386 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
1387 return -ENOMEM;
1388 }
1389 cval->chip = state->chip;
1390 cval->ctrlif = state->ctrlif;
1391 cval->id = unitid;
1392 cval->val_type = USB_MIXER_U8;
1393 cval->channels = 1;
1394 cval->min = 1;
1395 cval->max = num_ins;
1396 cval->res = 1;
1397 cval->initialized = 1;
1398
1399 namelist = kmalloc(sizeof(char *) * num_ins, GFP_KERNEL);
1400 if (! namelist) {
1401 snd_printk(KERN_ERR "cannot malloc\n");
1402 kfree(cval);
1403 return -ENOMEM;
1404 }
1405 #define MAX_ITEM_NAME_LEN 64
1406 for (i = 0; i < num_ins; i++) {
1407 usb_audio_term_t iterm;
1408 len = 0;
1409 namelist[i] = kmalloc(MAX_ITEM_NAME_LEN, GFP_KERNEL);
1410 if (! namelist[i]) {
1411 snd_printk(KERN_ERR "cannot malloc\n");
1412 while (--i > 0)
1413 kfree(namelist[i]);
1414 kfree(namelist);
1415 kfree(cval);
1416 return -ENOMEM;
1417 }
1418 if (check_input_term(state, desc[5 + i], &iterm) >= 0)
1419 len = get_term_name(state, &iterm, namelist[i], MAX_ITEM_NAME_LEN, 0);
1420 if (! len)
1421 sprintf(namelist[i], "Input %d", i);
1422 }
1423
1424 kctl = snd_ctl_new1(&mixer_selectunit_ctl, cval);
1425 if (! kctl) {
1426 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
1427 kfree(cval);
1428 return -ENOMEM;
1429 }
1430 kctl->private_value = (unsigned long)namelist;
1431 kctl->private_free = usb_mixer_selector_elem_free;
1432
1433 nameid = desc[desc[0] - 1];
1434 len = check_mapped_name(state, unitid, 0, kctl->id.name, sizeof(kctl->id.name));
1435 if (len)
1436 ;
1437 else if (nameid)
1438 snd_usb_copy_string_desc(state, nameid, kctl->id.name, sizeof(kctl->id.name));
1439 else {
1440 len = get_term_name(state, &state->oterm,
1441 kctl->id.name, sizeof(kctl->id.name), 0);
1442 if (! len)
1443 strlcpy(kctl->id.name, "USB", sizeof(kctl->id.name));
1444
1445 if ((state->oterm.type & 0xff00) == 0x0100)
1446 strlcat(kctl->id.name, " Capture Source", sizeof(kctl->id.name));
1447 else
1448 strlcat(kctl->id.name, " Playback Source", sizeof(kctl->id.name));
1449 }
1450
1451 snd_printdd(KERN_INFO "[%d] SU [%s] items = %d\n",
1452 cval->id, kctl->id.name, num_ins);
1453 if ((err = add_control_to_empty(state->chip->card, kctl)) < 0)
1454 return err;
1455
1456 return 0;
1457 }
1458
1459
1460 /*
1461 * parse an audio unit recursively
1462 */
1463
1464 static int parse_audio_unit(mixer_build_t *state, int unitid)
1465 {
1466 unsigned char *p1;
1467
1468 if (test_and_set_bit(unitid, state->unitbitmap))
1469 return 0; /* the unit already visited */
1470
1471 p1 = find_audio_control_unit(state, unitid);
1472 if (!p1) {
1473 snd_printk(KERN_ERR "usbaudio: unit %d not found!\n", unitid);
1474 return -EINVAL;
1475 }
1476
1477 switch (p1[2]) {
1478 case INPUT_TERMINAL:
1479 return 0; /* NOP */
1480 case MIXER_UNIT:
1481 return parse_audio_mixer_unit(state, unitid, p1);
1482 case SELECTOR_UNIT:
1483 return parse_audio_selector_unit(state, unitid, p1);
1484 case FEATURE_UNIT:
1485 return parse_audio_feature_unit(state, unitid, p1);
1486 case PROCESSING_UNIT:
1487 return parse_audio_processing_unit(state, unitid, p1);
1488 case EXTENSION_UNIT:
1489 return parse_audio_extension_unit(state, unitid, p1);
1490 default:
1491 snd_printk(KERN_ERR "usbaudio: unit %u: unexpected type 0x%02x\n", unitid, p1[2]);
1492 return -EINVAL;
1493 }
1494 }
1495
1496 /*
1497 * create mixer controls
1498 *
1499 * walk through all OUTPUT_TERMINAL descriptors to search for mixers
1500 */
1501 int snd_usb_create_mixer(snd_usb_audio_t *chip, int ctrlif)
1502 {
1503 unsigned char *desc;
1504 mixer_build_t state;
1505 int err;
1506 const struct usbmix_ctl_map *map;
1507 struct usb_device_descriptor *dev = &chip->dev->descriptor;
1508 struct usb_host_interface *hostif = &usb_ifnum_to_if(chip->dev, ctrlif)->altsetting[0];
1509
1510 strcpy(chip->card->mixername, "USB Mixer");
1511
1512 memset(&state, 0, sizeof(state));
1513 state.chip = chip;
1514 state.buffer = hostif->extra;
1515 state.buflen = hostif->extralen;
1516 state.ctrlif = ctrlif;
1517 state.vendor = le16_to_cpu(dev->idVendor);
1518 state.product = le16_to_cpu(dev->idProduct);
1519
1520 /* check the mapping table */
1521 for (map = usbmix_ctl_maps; map->vendor; map++) {
1522 if (map->vendor == state.vendor && map->product == state.product) {
1523 state.map = map->map;
1524 chip->ignore_ctl_error = map->ignore_ctl_error;
1525 break;
1526 }
1527 }
1528 #ifdef IGNORE_CTL_ERROR
1529 chip->ignore_ctl_error = 1;
1530 #endif
1531
1532 desc = NULL;
1533 while ((desc = snd_usb_find_csint_desc(hostif->extra, hostif->extralen, desc, OUTPUT_TERMINAL)) != NULL) {
1534 if (desc[0] < 9)
1535 continue; /* invalid descriptor? */
1536 set_bit(desc[3], state.unitbitmap); /* mark terminal ID as visited */
1537 state.oterm.id = desc[3];
1538 state.oterm.type = combine_word(&desc[4]);
1539 state.oterm.name = desc[8];
1540 err = parse_audio_unit(&state, desc[7]);
1541 if (err < 0)
1542 return err;
1543 }
1544 return 0;
1545 }
kernel source for telekom puls (alcatel/mediatek)