[ALSA] Remove redundant NULL checks before kfree
[linux-2.6.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 #include <sound/hwdep.h>
39 #include <sound/info.h>
40
41 #include "usbaudio.h"
42
43 /*
44  */
45
46 /* ignore error from controls - for debugging */
47 /* #define IGNORE_CTL_ERROR */
48
49 typedef struct usb_mixer_build mixer_build_t;
50 typedef struct usb_audio_term usb_audio_term_t;
51 typedef struct usb_mixer_elem_info usb_mixer_elem_info_t;
52
53
54 struct usb_mixer_interface {
55         snd_usb_audio_t *chip;
56         unsigned int ctrlif;
57         struct list_head list;
58         unsigned int ignore_ctl_error;
59         struct urb *urb;
60         usb_mixer_elem_info_t **id_elems; /* array[256], indexed by unit id */
61
62         /* Sound Blaster remote control stuff */
63         enum {
64                 RC_NONE,
65                 RC_EXTIGY,
66                 RC_AUDIGY2NX,
67         } rc_type;
68         unsigned long rc_hwdep_open;
69         u32 rc_code;
70         wait_queue_head_t rc_waitq;
71         struct urb *rc_urb;
72         struct usb_ctrlrequest *rc_setup_packet;
73         u8 rc_buffer[6];
74
75         u8 audigy2nx_leds[3];
76 };
77
78
79 struct usb_audio_term {
80         int id;
81         int type;
82         int channels;
83         unsigned int chconfig;
84         int name;
85 };
86
87 struct usbmix_name_map;
88
89 struct usb_mixer_build {
90         snd_usb_audio_t *chip;
91         struct usb_mixer_interface *mixer;
92         unsigned char *buffer;
93         unsigned int buflen;
94         DECLARE_BITMAP(unitbitmap, 256);
95         usb_audio_term_t oterm;
96         const struct usbmix_name_map *map;
97         const struct usbmix_selector_map *selector_map;
98 };
99
100 struct usb_mixer_elem_info {
101         struct usb_mixer_interface *mixer;
102         usb_mixer_elem_info_t *next_id_elem; /* list of controls with same id */
103         snd_ctl_elem_id_t *elem_id;
104         unsigned int id;
105         unsigned int control;   /* CS or ICN (high byte) */
106         unsigned int cmask; /* channel mask bitmap: 0 = master */
107         int channels;
108         int val_type;
109         int min, max, res;
110         u8 initialized;
111 };
112
113
114 enum {
115         USB_FEATURE_NONE = 0,
116         USB_FEATURE_MUTE = 1,
117         USB_FEATURE_VOLUME,
118         USB_FEATURE_BASS,
119         USB_FEATURE_MID,
120         USB_FEATURE_TREBLE,
121         USB_FEATURE_GEQ,
122         USB_FEATURE_AGC,
123         USB_FEATURE_DELAY,
124         USB_FEATURE_BASSBOOST,
125         USB_FEATURE_LOUDNESS
126 };
127
128 enum {
129         USB_MIXER_BOOLEAN,
130         USB_MIXER_INV_BOOLEAN,
131         USB_MIXER_S8,
132         USB_MIXER_U8,
133         USB_MIXER_S16,
134         USB_MIXER_U16,
135 };
136
137 enum {
138         USB_PROC_UPDOWN = 1,
139         USB_PROC_UPDOWN_SWITCH = 1,
140         USB_PROC_UPDOWN_MODE_SEL = 2,
141
142         USB_PROC_PROLOGIC = 2,
143         USB_PROC_PROLOGIC_SWITCH = 1,
144         USB_PROC_PROLOGIC_MODE_SEL = 2,
145
146         USB_PROC_3DENH = 3,
147         USB_PROC_3DENH_SWITCH = 1,
148         USB_PROC_3DENH_SPACE = 2,
149
150         USB_PROC_REVERB = 4,
151         USB_PROC_REVERB_SWITCH = 1,
152         USB_PROC_REVERB_LEVEL = 2,
153         USB_PROC_REVERB_TIME = 3,
154         USB_PROC_REVERB_DELAY = 4,
155
156         USB_PROC_CHORUS = 5,
157         USB_PROC_CHORUS_SWITCH = 1,
158         USB_PROC_CHORUS_LEVEL = 2,
159         USB_PROC_CHORUS_RATE = 3,
160         USB_PROC_CHORUS_DEPTH = 4,
161
162         USB_PROC_DCR = 6,
163         USB_PROC_DCR_SWITCH = 1,
164         USB_PROC_DCR_RATIO = 2,
165         USB_PROC_DCR_MAX_AMP = 3,
166         USB_PROC_DCR_THRESHOLD = 4,
167         USB_PROC_DCR_ATTACK = 5,
168         USB_PROC_DCR_RELEASE = 6,
169 };
170
171 #define MAX_CHANNELS    10      /* max logical channels */
172
173
174 /*
175  * manual mapping of mixer names
176  * if the mixer topology is too complicated and the parsed names are
177  * ambiguous, add the entries in usbmixer_maps.c.
178  */
179 #include "usbmixer_maps.c"
180
181 /* get the mapped name if the unit matches */
182 static int check_mapped_name(mixer_build_t *state, int unitid, int control, char *buf, int buflen)
183 {
184         const struct usbmix_name_map *p;
185
186         if (! state->map)
187                 return 0;
188
189         for (p = state->map; p->id; p++) {
190                 if (p->id == unitid && p->name &&
191                     (! control || ! p->control || control == p->control)) {
192                         buflen--;
193                         return strlcpy(buf, p->name, buflen);
194                 }
195         }
196         return 0;
197 }
198
199 /* check whether the control should be ignored */
200 static int check_ignored_ctl(mixer_build_t *state, int unitid, int control)
201 {
202         const struct usbmix_name_map *p;
203
204         if (! state->map)
205                 return 0;
206         for (p = state->map; p->id; p++) {
207                 if (p->id == unitid && ! p->name &&
208                     (! control || ! p->control || control == p->control)) {
209                         // printk("ignored control %d:%d\n", unitid, control);
210                         return 1;
211                 }
212         }
213         return 0;
214 }
215
216 /* get the mapped selector source name */
217 static int check_mapped_selector_name(mixer_build_t *state, int unitid,
218                                       int index, char *buf, int buflen)
219 {
220         const struct usbmix_selector_map *p;
221
222         if (! state->selector_map)
223                 return 0;
224         for (p = state->selector_map; p->id; p++) {
225                 if (p->id == unitid && index < p->count)
226                         return strlcpy(buf, p->names[index], buflen);
227         }
228         return 0;
229 }
230
231 /*
232  * find an audio control unit with the given unit id
233  */
234 static void *find_audio_control_unit(mixer_build_t *state, unsigned char unit)
235 {
236         unsigned char *p;
237
238         p = NULL;
239         while ((p = snd_usb_find_desc(state->buffer, state->buflen, p,
240                                       USB_DT_CS_INTERFACE)) != NULL) {
241                 if (p[0] >= 4 && p[2] >= INPUT_TERMINAL && p[2] <= EXTENSION_UNIT && p[3] == unit)
242                         return p;
243         }
244         return NULL;
245 }
246
247
248 /*
249  * copy a string with the given id
250  */
251 static int snd_usb_copy_string_desc(mixer_build_t *state, int index, char *buf, int maxlen)
252 {
253         int len = usb_string(state->chip->dev, index, buf, maxlen - 1);
254         buf[len] = 0;
255         return len;
256 }
257
258 /*
259  * convert from the byte/word on usb descriptor to the zero-based integer
260  */
261 static int convert_signed_value(usb_mixer_elem_info_t *cval, int val)
262 {
263         switch (cval->val_type) {
264         case USB_MIXER_BOOLEAN:
265                 return !!val;
266         case USB_MIXER_INV_BOOLEAN:
267                 return !val;
268         case USB_MIXER_U8:
269                 val &= 0xff;
270                 break;
271         case USB_MIXER_S8:
272                 val &= 0xff;
273                 if (val >= 0x80)
274                         val -= 0x100;
275                 break;
276         case USB_MIXER_U16:
277                 val &= 0xffff;
278                 break;
279         case USB_MIXER_S16:
280                 val &= 0xffff;
281                 if (val >= 0x8000)
282                         val -= 0x10000;
283                 break;
284         }
285         return val;
286 }
287
288 /*
289  * convert from the zero-based int to the byte/word for usb descriptor
290  */
291 static int convert_bytes_value(usb_mixer_elem_info_t *cval, int val)
292 {
293         switch (cval->val_type) {
294         case USB_MIXER_BOOLEAN:
295                 return !!val;
296         case USB_MIXER_INV_BOOLEAN:
297                 return !val;
298         case USB_MIXER_S8:
299         case USB_MIXER_U8:
300                 return val & 0xff;
301         case USB_MIXER_S16:
302         case USB_MIXER_U16:
303                 return val & 0xffff;
304         }
305         return 0; /* not reached */
306 }
307
308 static int get_relative_value(usb_mixer_elem_info_t *cval, int val)
309 {
310         if (! cval->res)
311                 cval->res = 1;
312         if (val < cval->min)
313                 return 0;
314         else if (val > cval->max)
315                 return (cval->max - cval->min) / cval->res;
316         else
317                 return (val - cval->min) / cval->res;
318 }
319
320 static int get_abs_value(usb_mixer_elem_info_t *cval, int val)
321 {
322         if (val < 0)
323                 return cval->min;
324         if (! cval->res)
325                 cval->res = 1;
326         val *= cval->res;
327         val += cval->min;
328         if (val > cval->max)
329                 return cval->max;
330         return val;
331 }
332
333
334 /*
335  * retrieve a mixer value
336  */
337
338 static int get_ctl_value(usb_mixer_elem_info_t *cval, int request, int validx, int *value_ret)
339 {
340         unsigned char buf[2];
341         int val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1;
342         int timeout = 10;
343
344         while (timeout-- > 0) {
345                 if (snd_usb_ctl_msg(cval->mixer->chip->dev,
346                                     usb_rcvctrlpipe(cval->mixer->chip->dev, 0),
347                                     request,
348                                     USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
349                                     validx, cval->mixer->ctrlif | (cval->id << 8),
350                                     buf, val_len, 100) >= 0) {
351                         *value_ret = convert_signed_value(cval, snd_usb_combine_bytes(buf, val_len));
352                         return 0;
353                 }
354         }
355         snd_printdd(KERN_ERR "cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n",
356                     request, validx, cval->mixer->ctrlif | (cval->id << 8), cval->val_type);
357         return -EINVAL;
358 }
359
360 static int get_cur_ctl_value(usb_mixer_elem_info_t *cval, int validx, int *value)
361 {
362         return get_ctl_value(cval, GET_CUR, validx, value);
363 }
364
365 /* channel = 0: master, 1 = first channel */
366 inline static int get_cur_mix_value(usb_mixer_elem_info_t *cval, int channel, int *value)
367 {
368         return get_ctl_value(cval, GET_CUR, (cval->control << 8) | channel, value);
369 }
370
371 /*
372  * set a mixer value
373  */
374
375 static int set_ctl_value(usb_mixer_elem_info_t *cval, int request, int validx, int value_set)
376 {
377         unsigned char buf[2];
378         int val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1;
379         int timeout = 10;
380
381         value_set = convert_bytes_value(cval, value_set);
382         buf[0] = value_set & 0xff;
383         buf[1] = (value_set >> 8) & 0xff;
384         while (timeout -- > 0)
385                 if (snd_usb_ctl_msg(cval->mixer->chip->dev,
386                                     usb_sndctrlpipe(cval->mixer->chip->dev, 0),
387                                     request,
388                                     USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
389                                     validx, cval->mixer->ctrlif | (cval->id << 8),
390                                     buf, val_len, 100) >= 0)
391                         return 0;
392         snd_printdd(KERN_ERR "cannot set ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d, data = %#x/%#x\n",
393                     request, validx, cval->mixer->ctrlif | (cval->id << 8), cval->val_type, buf[0], buf[1]);
394         return -EINVAL;
395 }
396
397 static int set_cur_ctl_value(usb_mixer_elem_info_t *cval, int validx, int value)
398 {
399         return set_ctl_value(cval, SET_CUR, validx, value);
400 }
401
402 inline static int set_cur_mix_value(usb_mixer_elem_info_t *cval, int channel, int value)
403 {
404         return set_ctl_value(cval, SET_CUR, (cval->control << 8) | channel, value);
405 }
406
407
408 /*
409  * parser routines begin here...
410  */
411
412 static int parse_audio_unit(mixer_build_t *state, int unitid);
413
414
415 /*
416  * check if the input/output channel routing is enabled on the given bitmap.
417  * used for mixer unit parser
418  */
419 static int check_matrix_bitmap(unsigned char *bmap, int ich, int och, int num_outs)
420 {
421         int idx = ich * num_outs + och;
422         return bmap[idx >> 3] & (0x80 >> (idx & 7));
423 }
424
425
426 /*
427  * add an alsa control element
428  * search and increment the index until an empty slot is found.
429  *
430  * if failed, give up and free the control instance.
431  */
432
433 static int add_control_to_empty(mixer_build_t *state, snd_kcontrol_t *kctl)
434 {
435         usb_mixer_elem_info_t *cval = kctl->private_data;
436         int err;
437
438         while (snd_ctl_find_id(state->chip->card, &kctl->id))
439                 kctl->id.index++;
440         if ((err = snd_ctl_add(state->chip->card, kctl)) < 0) {
441                 snd_printd(KERN_ERR "cannot add control (err = %d)\n", err);
442                 snd_ctl_free_one(kctl);
443                 return err;
444         }
445         cval->elem_id = &kctl->id;
446         cval->next_id_elem = state->mixer->id_elems[cval->id];
447         state->mixer->id_elems[cval->id] = cval;
448         return 0;
449 }
450
451
452 /*
453  * get a terminal name string
454  */
455
456 static struct iterm_name_combo {
457         int type;
458         char *name;
459 } iterm_names[] = {
460         { 0x0300, "Output" },
461         { 0x0301, "Speaker" },
462         { 0x0302, "Headphone" },
463         { 0x0303, "HMD Audio" },
464         { 0x0304, "Desktop Speaker" },
465         { 0x0305, "Room Speaker" },
466         { 0x0306, "Com Speaker" },
467         { 0x0307, "LFE" },
468         { 0x0600, "External In" },
469         { 0x0601, "Analog In" },
470         { 0x0602, "Digital In" },
471         { 0x0603, "Line" },
472         { 0x0604, "Legacy In" },
473         { 0x0605, "IEC958 In" },
474         { 0x0606, "1394 DA Stream" },
475         { 0x0607, "1394 DV Stream" },
476         { 0x0700, "Embedded" },
477         { 0x0701, "Noise Source" },
478         { 0x0702, "Equalization Noise" },
479         { 0x0703, "CD" },
480         { 0x0704, "DAT" },
481         { 0x0705, "DCC" },
482         { 0x0706, "MiniDisk" },
483         { 0x0707, "Analog Tape" },
484         { 0x0708, "Phonograph" },
485         { 0x0709, "VCR Audio" },
486         { 0x070a, "Video Disk Audio" },
487         { 0x070b, "DVD Audio" },
488         { 0x070c, "TV Tuner Audio" },
489         { 0x070d, "Satellite Rec Audio" },
490         { 0x070e, "Cable Tuner Audio" },
491         { 0x070f, "DSS Audio" },
492         { 0x0710, "Radio Receiver" },
493         { 0x0711, "Radio Transmitter" },
494         { 0x0712, "Multi-Track Recorder" },
495         { 0x0713, "Synthesizer" },
496         { 0 },
497 };
498
499 static int get_term_name(mixer_build_t *state, usb_audio_term_t *iterm,
500                          unsigned char *name, int maxlen, int term_only)
501 {
502         struct iterm_name_combo *names;
503
504         if (iterm->name)
505                 return snd_usb_copy_string_desc(state, iterm->name, name, maxlen);
506
507         /* virtual type - not a real terminal */
508         if (iterm->type >> 16) {
509                 if (term_only)
510                         return 0;
511                 switch (iterm->type >> 16) {
512                 case SELECTOR_UNIT:
513                         strcpy(name, "Selector"); return 8;
514                 case PROCESSING_UNIT:
515                         strcpy(name, "Process Unit"); return 12;
516                 case EXTENSION_UNIT:
517                         strcpy(name, "Ext Unit"); return 8;
518                 case MIXER_UNIT:
519                         strcpy(name, "Mixer"); return 5;
520                 default:
521                         return sprintf(name, "Unit %d", iterm->id);
522                 }
523         }
524
525         switch (iterm->type & 0xff00) {
526         case 0x0100:
527                 strcpy(name, "PCM"); return 3;
528         case 0x0200:
529                 strcpy(name, "Mic"); return 3;
530         case 0x0400:
531                 strcpy(name, "Headset"); return 7;
532         case 0x0500:
533                 strcpy(name, "Phone"); return 5;
534         }
535
536         for (names = iterm_names; names->type; names++)
537                 if (names->type == iterm->type) {
538                         strcpy(name, names->name);
539                         return strlen(names->name);
540                 }
541         return 0;
542 }
543
544
545 /*
546  * parse the source unit recursively until it reaches to a terminal
547  * or a branched unit.
548  */
549 static int check_input_term(mixer_build_t *state, int id, usb_audio_term_t *term)
550 {
551         unsigned char *p1;
552
553         memset(term, 0, sizeof(*term));
554         while ((p1 = find_audio_control_unit(state, id)) != NULL) {
555                 term->id = id;
556                 switch (p1[2]) {
557                 case INPUT_TERMINAL:
558                         term->type = combine_word(p1 + 4);
559                         term->channels = p1[7];
560                         term->chconfig = combine_word(p1 + 8);
561                         term->name = p1[11];
562                         return 0;
563                 case FEATURE_UNIT:
564                         id = p1[4];
565                         break; /* continue to parse */
566                 case MIXER_UNIT:
567                         term->type = p1[2] << 16; /* virtual type */
568                         term->channels = p1[5 + p1[4]];
569                         term->chconfig = combine_word(p1 + 6 + p1[4]);
570                         term->name = p1[p1[0] - 1];
571                         return 0;
572                 case SELECTOR_UNIT:
573                         /* call recursively to retrieve the channel info */
574                         if (check_input_term(state, p1[5], term) < 0)
575                                 return -ENODEV;
576                         term->type = p1[2] << 16; /* virtual type */
577                         term->id = id;
578                         term->name = p1[9 + p1[0] - 1];
579                         return 0;
580                 case PROCESSING_UNIT:
581                 case EXTENSION_UNIT:
582                         if (p1[6] == 1) {
583                                 id = p1[7];
584                                 break; /* continue to parse */
585                         }
586                         term->type = p1[2] << 16; /* virtual type */
587                         term->channels = p1[7 + p1[6]];
588                         term->chconfig = combine_word(p1 + 8 + p1[6]);
589                         term->name = p1[12 + p1[6] + p1[11 + p1[6]]];
590                         return 0;
591                 default:
592                         return -ENODEV;
593                 }
594         }
595         return -ENODEV;
596 }
597
598
599 /*
600  * Feature Unit
601  */
602
603 /* feature unit control information */
604 struct usb_feature_control_info {
605         const char *name;
606         unsigned int type;      /* control type (mute, volume, etc.) */
607 };
608
609 static struct usb_feature_control_info audio_feature_info[] = {
610         { "Mute",               USB_MIXER_INV_BOOLEAN },
611         { "Volume",             USB_MIXER_S16 },
612         { "Tone Control - Bass",        USB_MIXER_S8 },
613         { "Tone Control - Mid",         USB_MIXER_S8 },
614         { "Tone Control - Treble",      USB_MIXER_S8 },
615         { "Graphic Equalizer",          USB_MIXER_S8 }, /* FIXME: not implemeted yet */
616         { "Auto Gain Control",  USB_MIXER_BOOLEAN },
617         { "Delay Control",      USB_MIXER_U16 },
618         { "Bass Boost",         USB_MIXER_BOOLEAN },
619         { "Loudness",           USB_MIXER_BOOLEAN },
620 };
621
622
623 /* private_free callback */
624 static void usb_mixer_elem_free(snd_kcontrol_t *kctl)
625 {
626         kfree(kctl->private_data);
627         kctl->private_data = NULL;
628 }
629
630
631 /*
632  * interface to ALSA control for feature/mixer units
633  */
634
635 /*
636  * retrieve the minimum and maximum values for the specified control
637  */
638 static int get_min_max(usb_mixer_elem_info_t *cval, int default_min)
639 {
640         /* for failsafe */
641         cval->min = default_min;
642         cval->max = cval->min + 1;
643         cval->res = 1;
644
645         if (cval->val_type == USB_MIXER_BOOLEAN ||
646             cval->val_type == USB_MIXER_INV_BOOLEAN) {
647                 cval->initialized = 1;
648         } else {
649                 int minchn = 0;
650                 if (cval->cmask) {
651                         int i;
652                         for (i = 0; i < MAX_CHANNELS; i++)
653                                 if (cval->cmask & (1 << i)) {
654                                         minchn = i + 1;
655                                         break;
656                                 }
657                 }
658                 if (get_ctl_value(cval, GET_MAX, (cval->control << 8) | minchn, &cval->max) < 0 ||
659                     get_ctl_value(cval, GET_MIN, (cval->control << 8) | minchn, &cval->min) < 0) {
660                         snd_printd(KERN_ERR "%d:%d: cannot get min/max values for control %d (id %d)\n",
661                                    cval->id, cval->mixer->ctrlif, cval->control, cval->id);
662                         return -EINVAL;
663                 }
664                 if (get_ctl_value(cval, GET_RES, (cval->control << 8) | minchn, &cval->res) < 0) {
665                         cval->res = 1;
666                 } else {
667                         int last_valid_res = cval->res;
668
669                         while (cval->res > 1) {
670                                 if (set_ctl_value(cval, SET_RES, (cval->control << 8) | minchn, cval->res / 2) < 0)
671                                         break;
672                                 cval->res /= 2;
673                         }
674                         if (get_ctl_value(cval, GET_RES, (cval->control << 8) | minchn, &cval->res) < 0)
675                                 cval->res = last_valid_res;
676                 }
677                 if (cval->res == 0)
678                         cval->res = 1;
679                 cval->initialized = 1;
680         }
681         return 0;
682 }
683
684
685 /* get a feature/mixer unit info */
686 static int mixer_ctl_feature_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *uinfo)
687 {
688         usb_mixer_elem_info_t *cval = kcontrol->private_data;
689
690         if (cval->val_type == USB_MIXER_BOOLEAN ||
691             cval->val_type == USB_MIXER_INV_BOOLEAN)
692                 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
693         else
694                 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
695         uinfo->count = cval->channels;
696         if (cval->val_type == USB_MIXER_BOOLEAN ||
697             cval->val_type == USB_MIXER_INV_BOOLEAN) {
698                 uinfo->value.integer.min = 0;
699                 uinfo->value.integer.max = 1;
700         } else {
701                 if (! cval->initialized)
702                         get_min_max(cval,  0);
703                 uinfo->value.integer.min = 0;
704                 uinfo->value.integer.max = (cval->max - cval->min) / cval->res;
705         }
706         return 0;
707 }
708
709 /* get the current value from feature/mixer unit */
710 static int mixer_ctl_feature_get(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
711 {
712         usb_mixer_elem_info_t *cval = kcontrol->private_data;
713         int c, cnt, val, err;
714
715         if (cval->cmask) {
716                 cnt = 0;
717                 for (c = 0; c < MAX_CHANNELS; c++) {
718                         if (cval->cmask & (1 << c)) {
719                                 err = get_cur_mix_value(cval, c + 1, &val);
720                                 if (err < 0) {
721                                         if (cval->mixer->ignore_ctl_error) {
722                                                 ucontrol->value.integer.value[0] = cval->min;
723                                                 return 0;
724                                         }
725                                         snd_printd(KERN_ERR "cannot get current value for control %d ch %d: err = %d\n", cval->control, c + 1, err);
726                                         return err;
727                                 }
728                                 val = get_relative_value(cval, val);
729                                 ucontrol->value.integer.value[cnt] = val;
730                                 cnt++;
731                         }
732                 }
733         } else {
734                 /* master channel */
735                 err = get_cur_mix_value(cval, 0, &val);
736                 if (err < 0) {
737                         if (cval->mixer->ignore_ctl_error) {
738                                 ucontrol->value.integer.value[0] = cval->min;
739                                 return 0;
740                         }
741                         snd_printd(KERN_ERR "cannot get current value for control %d master ch: err = %d\n", cval->control, err);
742                         return err;
743                 }
744                 val = get_relative_value(cval, val);
745                 ucontrol->value.integer.value[0] = val;
746         }
747         return 0;
748 }
749
750 /* put the current value to feature/mixer unit */
751 static int mixer_ctl_feature_put(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
752 {
753         usb_mixer_elem_info_t *cval = kcontrol->private_data;
754         int c, cnt, val, oval, err;
755         int changed = 0;
756
757         if (cval->cmask) {
758                 cnt = 0;
759                 for (c = 0; c < MAX_CHANNELS; c++) {
760                         if (cval->cmask & (1 << c)) {
761                                 err = get_cur_mix_value(cval, c + 1, &oval);
762                                 if (err < 0) {
763                                         if (cval->mixer->ignore_ctl_error)
764                                                 return 0;
765                                         return err;
766                                 }
767                                 val = ucontrol->value.integer.value[cnt];
768                                 val = get_abs_value(cval, val);
769                                 if (oval != val) {
770                                         set_cur_mix_value(cval, c + 1, val);
771                                         changed = 1;
772                                 }
773                                 get_cur_mix_value(cval, c + 1, &val);
774                                 cnt++;
775                         }
776                 }
777         } else {
778                 /* master channel */
779                 err = get_cur_mix_value(cval, 0, &oval);
780                 if (err < 0 && cval->mixer->ignore_ctl_error)
781                         return 0;
782                 if (err < 0)
783                         return err;
784                 val = ucontrol->value.integer.value[0];
785                 val = get_abs_value(cval, val);
786                 if (val != oval) {
787                         set_cur_mix_value(cval, 0, val);
788                         changed = 1;
789                 }
790         }
791         return changed;
792 }
793
794 static snd_kcontrol_new_t usb_feature_unit_ctl = {
795         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
796         .name = "", /* will be filled later manually */
797         .info = mixer_ctl_feature_info,
798         .get = mixer_ctl_feature_get,
799         .put = mixer_ctl_feature_put,
800 };
801
802
803 /*
804  * build a feature control
805  */
806
807 static void build_feature_ctl(mixer_build_t *state, unsigned char *desc,
808                               unsigned int ctl_mask, int control,
809                               usb_audio_term_t *iterm, int unitid)
810 {
811         unsigned int len = 0;
812         int mapped_name = 0;
813         int nameid = desc[desc[0] - 1];
814         snd_kcontrol_t *kctl;
815         usb_mixer_elem_info_t *cval;
816
817         control++; /* change from zero-based to 1-based value */
818
819         if (control == USB_FEATURE_GEQ) {
820                 /* FIXME: not supported yet */
821                 return;
822         }
823
824         if (check_ignored_ctl(state, unitid, control))
825                 return;
826
827         cval = kcalloc(1, sizeof(*cval), GFP_KERNEL);
828         if (! cval) {
829                 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
830                 return;
831         }
832         cval->mixer = state->mixer;
833         cval->id = unitid;
834         cval->control = control;
835         cval->cmask = ctl_mask;
836         cval->val_type = audio_feature_info[control-1].type;
837         if (ctl_mask == 0)
838                 cval->channels = 1;     /* master channel */
839         else {
840                 int i, c = 0;
841                 for (i = 0; i < 16; i++)
842                         if (ctl_mask & (1 << i))
843                                 c++;
844                 cval->channels = c;
845         }
846
847         /* get min/max values */
848         get_min_max(cval, 0);
849
850         kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval);
851         if (! kctl) {
852                 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
853                 kfree(cval);
854                 return;
855         }
856         kctl->private_free = usb_mixer_elem_free;
857
858         len = check_mapped_name(state, unitid, control, kctl->id.name, sizeof(kctl->id.name));
859         mapped_name = len != 0;
860         if (! len && nameid)
861                 len = snd_usb_copy_string_desc(state, nameid, kctl->id.name, sizeof(kctl->id.name));
862
863         switch (control) {
864         case USB_FEATURE_MUTE:
865         case USB_FEATURE_VOLUME:
866                 /* determine the control name.  the rule is:
867                  * - if a name id is given in descriptor, use it.
868                  * - if the connected input can be determined, then use the name
869                  *   of terminal type.
870                  * - if the connected output can be determined, use it.
871                  * - otherwise, anonymous name.
872                  */
873                 if (! len) {
874                         len = get_term_name(state, iterm, kctl->id.name, sizeof(kctl->id.name), 1);
875                         if (! len)
876                                 len = get_term_name(state, &state->oterm, kctl->id.name, sizeof(kctl->id.name), 1);
877                         if (! len)
878                                 len = snprintf(kctl->id.name, sizeof(kctl->id.name),
879                                                "Feature %d", unitid);
880                 }
881                 /* determine the stream direction:
882                  * if the connected output is USB stream, then it's likely a
883                  * capture stream.  otherwise it should be playback (hopefully :)
884                  */
885                 if (! mapped_name && ! (state->oterm.type >> 16)) {
886                         if ((state->oterm.type & 0xff00) == 0x0100) {
887                                 len = strlcat(kctl->id.name, " Capture", sizeof(kctl->id.name));
888                         } else {
889                                 len = strlcat(kctl->id.name + len, " Playback", sizeof(kctl->id.name));
890                         }
891                 }
892                 strlcat(kctl->id.name + len, control == USB_FEATURE_MUTE ? " Switch" : " Volume",
893                         sizeof(kctl->id.name));
894                 break;
895
896         default:
897                 if (! len)
898                         strlcpy(kctl->id.name, audio_feature_info[control-1].name,
899                                 sizeof(kctl->id.name));
900                 break;
901         }
902
903         /* quirk for UDA1321/N101 */
904         /* note that detection between firmware 2.1.1.7 (N101) and later 2.1.1.21 */
905         /* is not very clear from datasheets */
906         /* I hope that the min value is -15360 for newer firmware --jk */
907         switch (state->chip->usb_id) {
908         case USB_ID(0x0471, 0x0101):
909         case USB_ID(0x0471, 0x0104):
910         case USB_ID(0x0471, 0x0105):
911         case USB_ID(0x0672, 0x1041):
912                 if (!strcmp(kctl->id.name, "PCM Playback Volume") &&
913                     cval->min == -15616) {
914                         snd_printk("using volume control quirk for the UDA1321/N101 chip\n");
915                         cval->max = -256;
916                 }
917         }
918
919         snd_printdd(KERN_INFO "[%d] FU [%s] ch = %d, val = %d/%d/%d\n",
920                     cval->id, kctl->id.name, cval->channels, cval->min, cval->max, cval->res);
921         add_control_to_empty(state, kctl);
922 }
923
924
925
926 /*
927  * parse a feature unit
928  *
929  * most of controlls are defined here.
930  */
931 static int parse_audio_feature_unit(mixer_build_t *state, int unitid, unsigned char *ftr)
932 {
933         int channels, i, j;
934         usb_audio_term_t iterm;
935         unsigned int master_bits, first_ch_bits;
936         int err, csize;
937
938         if (ftr[0] < 7 || ! (csize = ftr[5]) || ftr[0] < 7 + csize) {
939                 snd_printk(KERN_ERR "usbaudio: unit %u: invalid FEATURE_UNIT descriptor\n", unitid);
940                 return -EINVAL;
941         }
942
943         /* parse the source unit */
944         if ((err = parse_audio_unit(state, ftr[4])) < 0)
945                 return err;
946
947         /* determine the input source type and name */
948         if (check_input_term(state, ftr[4], &iterm) < 0)
949                 return -EINVAL;
950
951         channels = (ftr[0] - 7) / csize - 1;
952
953         master_bits = snd_usb_combine_bytes(ftr + 6, csize);
954         if (channels > 0)
955                 first_ch_bits = snd_usb_combine_bytes(ftr + 6 + csize, csize);
956         else
957                 first_ch_bits = 0;
958         /* check all control types */
959         for (i = 0; i < 10; i++) {
960                 unsigned int ch_bits = 0;
961                 for (j = 0; j < channels; j++) {
962                         unsigned int mask = snd_usb_combine_bytes(ftr + 6 + csize * (j+1), csize);
963                         if (mask & (1 << i))
964                                 ch_bits |= (1 << j);
965                 }
966                 if (ch_bits & 1) /* the first channel must be set (for ease of programming) */
967                         build_feature_ctl(state, ftr, ch_bits, i, &iterm, unitid);
968                 if (master_bits & (1 << i))
969                         build_feature_ctl(state, ftr, 0, i, &iterm, unitid);
970         }
971
972         return 0;
973 }
974
975
976 /*
977  * Mixer Unit
978  */
979
980 /*
981  * build a mixer unit control
982  *
983  * the callbacks are identical with feature unit.
984  * input channel number (zero based) is given in control field instead.
985  */
986
987 static void build_mixer_unit_ctl(mixer_build_t *state, unsigned char *desc,
988                                  int in_pin, int in_ch, int unitid,
989                                  usb_audio_term_t *iterm)
990 {
991         usb_mixer_elem_info_t *cval;
992         unsigned int input_pins = desc[4];
993         unsigned int num_outs = desc[5 + input_pins];
994         unsigned int i, len;
995         snd_kcontrol_t *kctl;
996
997         if (check_ignored_ctl(state, unitid, 0))
998                 return;
999
1000         cval = kcalloc(1, sizeof(*cval), GFP_KERNEL);
1001         if (! cval)
1002                 return;
1003
1004         cval->mixer = state->mixer;
1005         cval->id = unitid;
1006         cval->control = in_ch + 1; /* based on 1 */
1007         cval->val_type = USB_MIXER_S16;
1008         for (i = 0; i < num_outs; i++) {
1009                 if (check_matrix_bitmap(desc + 9 + input_pins, in_ch, i, num_outs)) {
1010                         cval->cmask |= (1 << i);
1011                         cval->channels++;
1012                 }
1013         }
1014
1015         /* get min/max values */
1016         get_min_max(cval, 0);
1017
1018         kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval);
1019         if (! kctl) {
1020                 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
1021                 kfree(cval);
1022                 return;
1023         }
1024         kctl->private_free = usb_mixer_elem_free;
1025
1026         len = check_mapped_name(state, unitid, 0, kctl->id.name, sizeof(kctl->id.name));
1027         if (! len)
1028                 len = get_term_name(state, iterm, kctl->id.name, sizeof(kctl->id.name), 0);
1029         if (! len)
1030                 len = sprintf(kctl->id.name, "Mixer Source %d", in_ch + 1);
1031         strlcat(kctl->id.name + len, " Volume", sizeof(kctl->id.name));
1032
1033         snd_printdd(KERN_INFO "[%d] MU [%s] ch = %d, val = %d/%d\n",
1034                     cval->id, kctl->id.name, cval->channels, cval->min, cval->max);
1035         add_control_to_empty(state, kctl);
1036 }
1037
1038
1039 /*
1040  * parse a mixer unit
1041  */
1042 static int parse_audio_mixer_unit(mixer_build_t *state, int unitid, unsigned char *desc)
1043 {
1044         usb_audio_term_t iterm;
1045         int input_pins, num_ins, num_outs;
1046         int pin, ich, err;
1047
1048         if (desc[0] < 11 || ! (input_pins = desc[4]) || ! (num_outs = desc[5 + input_pins])) {
1049                 snd_printk(KERN_ERR "invalid MIXER UNIT descriptor %d\n", unitid);
1050                 return -EINVAL;
1051         }
1052         /* no bmControls field (e.g. Maya44) -> ignore */
1053         if (desc[0] <= 10 + input_pins) {
1054                 snd_printdd(KERN_INFO "MU %d has no bmControls field\n", unitid);
1055                 return 0;
1056         }
1057
1058         num_ins = 0;
1059         ich = 0;
1060         for (pin = 0; pin < input_pins; pin++) {
1061                 err = parse_audio_unit(state, desc[5 + pin]);
1062                 if (err < 0)
1063                         return err;
1064                 err = check_input_term(state, desc[5 + pin], &iterm);
1065                 if (err < 0)
1066                         return err;
1067                 num_ins += iterm.channels;
1068                 for (; ich < num_ins; ++ich) {
1069                         int och, ich_has_controls = 0;
1070
1071                         for (och = 0; och < num_outs; ++och) {
1072                                 if (check_matrix_bitmap(desc + 9 + input_pins,
1073                                                         ich, och, num_outs)) {
1074                                         ich_has_controls = 1;
1075                                         break;
1076                                 }
1077                         }
1078                         if (ich_has_controls)
1079                                 build_mixer_unit_ctl(state, desc, pin, ich,
1080                                                      unitid, &iterm);
1081                 }
1082         }
1083         return 0;
1084 }
1085
1086
1087 /*
1088  * Processing Unit / Extension Unit
1089  */
1090
1091 /* get callback for processing/extension unit */
1092 static int mixer_ctl_procunit_get(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
1093 {
1094         usb_mixer_elem_info_t *cval = kcontrol->private_data;
1095         int err, val;
1096
1097         err = get_cur_ctl_value(cval, cval->control << 8, &val);
1098         if (err < 0 && cval->mixer->ignore_ctl_error) {
1099                 ucontrol->value.integer.value[0] = cval->min;
1100                 return 0;
1101         }
1102         if (err < 0)
1103                 return err;
1104         val = get_relative_value(cval, val);
1105         ucontrol->value.integer.value[0] = val;
1106         return 0;
1107 }
1108
1109 /* put callback for processing/extension unit */
1110 static int mixer_ctl_procunit_put(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
1111 {
1112         usb_mixer_elem_info_t *cval = kcontrol->private_data;
1113         int val, oval, err;
1114
1115         err = get_cur_ctl_value(cval, cval->control << 8, &oval);
1116         if (err < 0) {
1117                 if (cval->mixer->ignore_ctl_error)
1118                         return 0;
1119                 return err;
1120         }
1121         val = ucontrol->value.integer.value[0];
1122         val = get_abs_value(cval, val);
1123         if (val != oval) {
1124                 set_cur_ctl_value(cval, cval->control << 8, val);
1125                 return 1;
1126         }
1127         return 0;
1128 }
1129
1130 /* alsa control interface for processing/extension unit */
1131 static snd_kcontrol_new_t mixer_procunit_ctl = {
1132         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1133         .name = "", /* will be filled later */
1134         .info = mixer_ctl_feature_info,
1135         .get = mixer_ctl_procunit_get,
1136         .put = mixer_ctl_procunit_put,
1137 };
1138
1139
1140 /*
1141  * predefined data for processing units
1142  */
1143 struct procunit_value_info {
1144         int control;
1145         char *suffix;
1146         int val_type;
1147         int min_value;
1148 };
1149
1150 struct procunit_info {
1151         int type;
1152         char *name;
1153         struct procunit_value_info *values;
1154 };
1155
1156 static struct procunit_value_info updown_proc_info[] = {
1157         { USB_PROC_UPDOWN_SWITCH, "Switch", USB_MIXER_BOOLEAN },
1158         { USB_PROC_UPDOWN_MODE_SEL, "Mode Select", USB_MIXER_U8, 1 },
1159         { 0 }
1160 };
1161 static struct procunit_value_info prologic_proc_info[] = {
1162         { USB_PROC_PROLOGIC_SWITCH, "Switch", USB_MIXER_BOOLEAN },
1163         { USB_PROC_PROLOGIC_MODE_SEL, "Mode Select", USB_MIXER_U8, 1 },
1164         { 0 }
1165 };
1166 static struct procunit_value_info threed_enh_proc_info[] = {
1167         { USB_PROC_3DENH_SWITCH, "Switch", USB_MIXER_BOOLEAN },
1168         { USB_PROC_3DENH_SPACE, "Spaciousness", USB_MIXER_U8 },
1169         { 0 }
1170 };
1171 static struct procunit_value_info reverb_proc_info[] = {
1172         { USB_PROC_REVERB_SWITCH, "Switch", USB_MIXER_BOOLEAN },
1173         { USB_PROC_REVERB_LEVEL, "Level", USB_MIXER_U8 },
1174         { USB_PROC_REVERB_TIME, "Time", USB_MIXER_U16 },
1175         { USB_PROC_REVERB_DELAY, "Delay", USB_MIXER_U8 },
1176         { 0 }
1177 };
1178 static struct procunit_value_info chorus_proc_info[] = {
1179         { USB_PROC_CHORUS_SWITCH, "Switch", USB_MIXER_BOOLEAN },
1180         { USB_PROC_CHORUS_LEVEL, "Level", USB_MIXER_U8 },
1181         { USB_PROC_CHORUS_RATE, "Rate", USB_MIXER_U16 },
1182         { USB_PROC_CHORUS_DEPTH, "Depth", USB_MIXER_U16 },
1183         { 0 }
1184 };
1185 static struct procunit_value_info dcr_proc_info[] = {
1186         { USB_PROC_DCR_SWITCH, "Switch", USB_MIXER_BOOLEAN },
1187         { USB_PROC_DCR_RATIO, "Ratio", USB_MIXER_U16 },
1188         { USB_PROC_DCR_MAX_AMP, "Max Amp", USB_MIXER_S16 },
1189         { USB_PROC_DCR_THRESHOLD, "Threshold", USB_MIXER_S16 },
1190         { USB_PROC_DCR_ATTACK, "Attack Time", USB_MIXER_U16 },
1191         { USB_PROC_DCR_RELEASE, "Release Time", USB_MIXER_U16 },
1192         { 0 }
1193 };
1194
1195 static struct procunit_info procunits[] = {
1196         { USB_PROC_UPDOWN, "Up Down", updown_proc_info },
1197         { USB_PROC_PROLOGIC, "Dolby Prologic", prologic_proc_info },
1198         { USB_PROC_3DENH, "3D Stereo Extender", threed_enh_proc_info },
1199         { USB_PROC_REVERB, "Reverb", reverb_proc_info },
1200         { USB_PROC_CHORUS, "Chorus", chorus_proc_info },
1201         { USB_PROC_DCR, "DCR", dcr_proc_info },
1202         { 0 },
1203 };
1204
1205 /*
1206  * build a processing/extension unit
1207  */
1208 static int build_audio_procunit(mixer_build_t *state, int unitid, unsigned char *dsc, struct procunit_info *list, char *name)
1209 {
1210         int num_ins = dsc[6];
1211         usb_mixer_elem_info_t *cval;
1212         snd_kcontrol_t *kctl;
1213         int i, err, nameid, type, len;
1214         struct procunit_info *info;
1215         struct procunit_value_info *valinfo;
1216         static struct procunit_value_info default_value_info[] = {
1217                 { 0x01, "Switch", USB_MIXER_BOOLEAN },
1218                 { 0 }
1219         };
1220         static struct procunit_info default_info = {
1221                 0, NULL, default_value_info
1222         };
1223
1224         if (dsc[0] < 13 || dsc[0] < 13 + num_ins || dsc[0] < num_ins + dsc[11 + num_ins]) {
1225                 snd_printk(KERN_ERR "invalid %s descriptor (id %d)\n", name, unitid);
1226                 return -EINVAL;
1227         }
1228
1229         for (i = 0; i < num_ins; i++) {
1230                 if ((err = parse_audio_unit(state, dsc[7 + i])) < 0)
1231                         return err;
1232         }
1233
1234         type = combine_word(&dsc[4]);
1235         for (info = list; info && info->type; info++)
1236                 if (info->type == type)
1237                         break;
1238         if (! info || ! info->type)
1239                 info = &default_info;
1240
1241         for (valinfo = info->values; valinfo->control; valinfo++) {
1242                 /* FIXME: bitmap might be longer than 8bit */
1243                 if (! (dsc[12 + num_ins] & (1 << (valinfo->control - 1))))
1244                         continue;
1245                 if (check_ignored_ctl(state, unitid, valinfo->control))
1246                         continue;
1247                 cval = kcalloc(1, sizeof(*cval), GFP_KERNEL);
1248                 if (! cval) {
1249                         snd_printk(KERN_ERR "cannot malloc kcontrol\n");
1250                         return -ENOMEM;
1251                 }
1252                 cval->mixer = state->mixer;
1253                 cval->id = unitid;
1254                 cval->control = valinfo->control;
1255                 cval->val_type = valinfo->val_type;
1256                 cval->channels = 1;
1257
1258                 /* get min/max values */
1259                 if (type == USB_PROC_UPDOWN && cval->control == USB_PROC_UPDOWN_MODE_SEL) {
1260                         /* FIXME: hard-coded */
1261                         cval->min = 1;
1262                         cval->max = dsc[15];
1263                         cval->res = 1;
1264                         cval->initialized = 1;
1265                 } else
1266                         get_min_max(cval, valinfo->min_value);
1267
1268                 kctl = snd_ctl_new1(&mixer_procunit_ctl, cval);
1269                 if (! kctl) {
1270                         snd_printk(KERN_ERR "cannot malloc kcontrol\n");
1271                         kfree(cval);
1272                         return -ENOMEM;
1273                 }
1274                 kctl->private_free = usb_mixer_elem_free;
1275
1276                 if (check_mapped_name(state, unitid, cval->control, kctl->id.name, sizeof(kctl->id.name)))
1277                         ;
1278                 else if (info->name)
1279                         strlcpy(kctl->id.name, info->name, sizeof(kctl->id.name));
1280                 else {
1281                         nameid = dsc[12 + num_ins + dsc[11 + num_ins]];
1282                         len = 0;
1283                         if (nameid)
1284                                 len = snd_usb_copy_string_desc(state, nameid, kctl->id.name, sizeof(kctl->id.name));
1285                         if (! len)
1286                                 strlcpy(kctl->id.name, name, sizeof(kctl->id.name));
1287                 }
1288                 strlcat(kctl->id.name, " ", sizeof(kctl->id.name));
1289                 strlcat(kctl->id.name, valinfo->suffix, sizeof(kctl->id.name));
1290
1291                 snd_printdd(KERN_INFO "[%d] PU [%s] ch = %d, val = %d/%d\n",
1292                             cval->id, kctl->id.name, cval->channels, cval->min, cval->max);
1293                 if ((err = add_control_to_empty(state, kctl)) < 0)
1294                         return err;
1295         }
1296         return 0;
1297 }
1298
1299
1300 static int parse_audio_processing_unit(mixer_build_t *state, int unitid, unsigned char *desc)
1301 {
1302         return build_audio_procunit(state, unitid, desc, procunits, "Processing Unit");
1303 }
1304
1305 static int parse_audio_extension_unit(mixer_build_t *state, int unitid, unsigned char *desc)
1306 {
1307         return build_audio_procunit(state, unitid, desc, NULL, "Extension Unit");
1308 }
1309
1310
1311 /*
1312  * Selector Unit
1313  */
1314
1315 /* info callback for selector unit
1316  * use an enumerator type for routing
1317  */
1318 static int mixer_ctl_selector_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *uinfo)
1319 {
1320         usb_mixer_elem_info_t *cval = kcontrol->private_data;
1321         char **itemlist = (char **)kcontrol->private_value;
1322
1323         snd_assert(itemlist, return -EINVAL);
1324         uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
1325         uinfo->count = 1;
1326         uinfo->value.enumerated.items = cval->max;
1327         if ((int)uinfo->value.enumerated.item >= cval->max)
1328                 uinfo->value.enumerated.item = cval->max - 1;
1329         strcpy(uinfo->value.enumerated.name, itemlist[uinfo->value.enumerated.item]);
1330         return 0;
1331 }
1332
1333 /* get callback for selector unit */
1334 static int mixer_ctl_selector_get(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
1335 {
1336         usb_mixer_elem_info_t *cval = kcontrol->private_data;
1337         int val, err;
1338
1339         err = get_cur_ctl_value(cval, 0, &val);
1340         if (err < 0) {
1341                 if (cval->mixer->ignore_ctl_error) {
1342                         ucontrol->value.enumerated.item[0] = 0;
1343                         return 0;
1344                 }
1345                 return err;
1346         }
1347         val = get_relative_value(cval, val);
1348         ucontrol->value.enumerated.item[0] = val;
1349         return 0;
1350 }
1351
1352 /* put callback for selector unit */
1353 static int mixer_ctl_selector_put(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
1354 {
1355         usb_mixer_elem_info_t *cval = kcontrol->private_data;
1356         int val, oval, err;
1357
1358         err = get_cur_ctl_value(cval, 0, &oval);
1359         if (err < 0) {
1360                 if (cval->mixer->ignore_ctl_error)
1361                         return 0;
1362                 return err;
1363         }
1364         val = ucontrol->value.enumerated.item[0];
1365         val = get_abs_value(cval, val);
1366         if (val != oval) {
1367                 set_cur_ctl_value(cval, 0, val);
1368                 return 1;
1369         }
1370         return 0;
1371 }
1372
1373 /* alsa control interface for selector unit */
1374 static snd_kcontrol_new_t mixer_selectunit_ctl = {
1375         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1376         .name = "", /* will be filled later */
1377         .info = mixer_ctl_selector_info,
1378         .get = mixer_ctl_selector_get,
1379         .put = mixer_ctl_selector_put,
1380 };
1381
1382
1383 /* private free callback.
1384  * free both private_data and private_value
1385  */
1386 static void usb_mixer_selector_elem_free(snd_kcontrol_t *kctl)
1387 {
1388         int i, num_ins = 0;
1389
1390         if (kctl->private_data) {
1391                 usb_mixer_elem_info_t *cval = kctl->private_data;
1392                 num_ins = cval->max;
1393                 kfree(cval);
1394                 kctl->private_data = NULL;
1395         }
1396         if (kctl->private_value) {
1397                 char **itemlist = (char **)kctl->private_value;
1398                 for (i = 0; i < num_ins; i++)
1399                         kfree(itemlist[i]);
1400                 kfree(itemlist);
1401                 kctl->private_value = 0;
1402         }
1403 }
1404
1405 /*
1406  * parse a selector unit
1407  */
1408 static int parse_audio_selector_unit(mixer_build_t *state, int unitid, unsigned char *desc)
1409 {
1410         unsigned int num_ins = desc[4];
1411         unsigned int i, nameid, len;
1412         int err;
1413         usb_mixer_elem_info_t *cval;
1414         snd_kcontrol_t *kctl;
1415         char **namelist;
1416
1417         if (! num_ins || desc[0] < 6 + num_ins) {
1418                 snd_printk(KERN_ERR "invalid SELECTOR UNIT descriptor %d\n", unitid);
1419                 return -EINVAL;
1420         }
1421
1422         for (i = 0; i < num_ins; i++) {
1423                 if ((err = parse_audio_unit(state, desc[5 + i])) < 0)
1424                         return err;
1425         }
1426
1427         if (num_ins == 1) /* only one ? nonsense! */
1428                 return 0;
1429
1430         if (check_ignored_ctl(state, unitid, 0))
1431                 return 0;
1432
1433         cval = kcalloc(1, sizeof(*cval), GFP_KERNEL);
1434         if (! cval) {
1435                 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
1436                 return -ENOMEM;
1437         }
1438         cval->mixer = state->mixer;
1439         cval->id = unitid;
1440         cval->val_type = USB_MIXER_U8;
1441         cval->channels = 1;
1442         cval->min = 1;
1443         cval->max = num_ins;
1444         cval->res = 1;
1445         cval->initialized = 1;
1446
1447         namelist = kmalloc(sizeof(char *) * num_ins, GFP_KERNEL);
1448         if (! namelist) {
1449                 snd_printk(KERN_ERR "cannot malloc\n");
1450                 kfree(cval);
1451                 return -ENOMEM;
1452         }
1453 #define MAX_ITEM_NAME_LEN       64
1454         for (i = 0; i < num_ins; i++) {
1455                 usb_audio_term_t iterm;
1456                 len = 0;
1457                 namelist[i] = kmalloc(MAX_ITEM_NAME_LEN, GFP_KERNEL);
1458                 if (! namelist[i]) {
1459                         snd_printk(KERN_ERR "cannot malloc\n");
1460                         while (--i > 0)
1461                                 kfree(namelist[i]);
1462                         kfree(namelist);
1463                         kfree(cval);
1464                         return -ENOMEM;
1465                 }
1466                 len = check_mapped_selector_name(state, unitid, i, namelist[i],
1467                                                  MAX_ITEM_NAME_LEN);
1468                 if (! len && check_input_term(state, desc[5 + i], &iterm) >= 0)
1469                         len = get_term_name(state, &iterm, namelist[i], MAX_ITEM_NAME_LEN, 0);
1470                 if (! len)
1471                         sprintf(namelist[i], "Input %d", i);
1472         }
1473
1474         kctl = snd_ctl_new1(&mixer_selectunit_ctl, cval);
1475         if (! kctl) {
1476                 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
1477                 kfree(cval);
1478                 return -ENOMEM;
1479         }
1480         kctl->private_value = (unsigned long)namelist;
1481         kctl->private_free = usb_mixer_selector_elem_free;
1482
1483         nameid = desc[desc[0] - 1];
1484         len = check_mapped_name(state, unitid, 0, kctl->id.name, sizeof(kctl->id.name));
1485         if (len)
1486                 ;
1487         else if (nameid)
1488                 snd_usb_copy_string_desc(state, nameid, kctl->id.name, sizeof(kctl->id.name));
1489         else {
1490                 len = get_term_name(state, &state->oterm,
1491                                     kctl->id.name, sizeof(kctl->id.name), 0);
1492                 if (! len)
1493                         strlcpy(kctl->id.name, "USB", sizeof(kctl->id.name));
1494
1495                 if ((state->oterm.type & 0xff00) == 0x0100)
1496                         strlcat(kctl->id.name, " Capture Source", sizeof(kctl->id.name));
1497                 else
1498                         strlcat(kctl->id.name, " Playback Source", sizeof(kctl->id.name));
1499         }
1500
1501         snd_printdd(KERN_INFO "[%d] SU [%s] items = %d\n",
1502                     cval->id, kctl->id.name, num_ins);
1503         if ((err = add_control_to_empty(state, kctl)) < 0)
1504                 return err;
1505
1506         return 0;
1507 }
1508
1509
1510 /*
1511  * parse an audio unit recursively
1512  */
1513
1514 static int parse_audio_unit(mixer_build_t *state, int unitid)
1515 {
1516         unsigned char *p1;
1517
1518         if (test_and_set_bit(unitid, state->unitbitmap))
1519                 return 0; /* the unit already visited */
1520
1521         p1 = find_audio_control_unit(state, unitid);
1522         if (!p1) {
1523                 snd_printk(KERN_ERR "usbaudio: unit %d not found!\n", unitid);
1524                 return -EINVAL;
1525         }
1526
1527         switch (p1[2]) {
1528         case INPUT_TERMINAL:
1529                 return 0; /* NOP */
1530         case MIXER_UNIT:
1531                 return parse_audio_mixer_unit(state, unitid, p1);
1532         case SELECTOR_UNIT:
1533                 return parse_audio_selector_unit(state, unitid, p1);
1534         case FEATURE_UNIT:
1535                 return parse_audio_feature_unit(state, unitid, p1);
1536         case PROCESSING_UNIT:
1537                 return parse_audio_processing_unit(state, unitid, p1);
1538         case EXTENSION_UNIT:
1539                 return parse_audio_extension_unit(state, unitid, p1);
1540         default:
1541                 snd_printk(KERN_ERR "usbaudio: unit %u: unexpected type 0x%02x\n", unitid, p1[2]);
1542                 return -EINVAL;
1543         }
1544 }
1545
1546 static void snd_usb_mixer_free(struct usb_mixer_interface *mixer)
1547 {
1548         kfree(mixer->id_elems);
1549         if (mixer->urb) {
1550                 kfree(mixer->urb->transfer_buffer);
1551                 usb_free_urb(mixer->urb);
1552         }
1553         if (mixer->rc_urb)
1554                 usb_free_urb(mixer->rc_urb);
1555         kfree(mixer->rc_setup_packet);
1556         kfree(mixer);
1557 }
1558
1559 static int snd_usb_mixer_dev_free(snd_device_t *device)
1560 {
1561         struct usb_mixer_interface *mixer = device->device_data;
1562         snd_usb_mixer_free(mixer);
1563         return 0;
1564 }
1565
1566 /*
1567  * create mixer controls
1568  *
1569  * walk through all OUTPUT_TERMINAL descriptors to search for mixers
1570  */
1571 static int snd_usb_mixer_controls(struct usb_mixer_interface *mixer)
1572 {
1573         unsigned char *desc;
1574         mixer_build_t state;
1575         int err;
1576         const struct usbmix_ctl_map *map;
1577         struct usb_host_interface *hostif;
1578
1579         hostif = &usb_ifnum_to_if(mixer->chip->dev, mixer->ctrlif)->altsetting[0];
1580         memset(&state, 0, sizeof(state));
1581         state.chip = mixer->chip;
1582         state.mixer = mixer;
1583         state.buffer = hostif->extra;
1584         state.buflen = hostif->extralen;
1585
1586         /* check the mapping table */
1587         for (map = usbmix_ctl_maps; map->id; map++) {
1588                 if (map->id == state.chip->usb_id) {
1589                         state.map = map->map;
1590                         state.selector_map = map->selector_map;
1591                         mixer->ignore_ctl_error = map->ignore_ctl_error;
1592                         break;
1593                 }
1594         }
1595
1596         desc = NULL;
1597         while ((desc = snd_usb_find_csint_desc(hostif->extra, hostif->extralen, desc, OUTPUT_TERMINAL)) != NULL) {
1598                 if (desc[0] < 9)
1599                         continue; /* invalid descriptor? */
1600                 set_bit(desc[3], state.unitbitmap);  /* mark terminal ID as visited */
1601                 state.oterm.id = desc[3];
1602                 state.oterm.type = combine_word(&desc[4]);
1603                 state.oterm.name = desc[8];
1604                 err = parse_audio_unit(&state, desc[7]);
1605                 if (err < 0)
1606                         return err;
1607         }
1608         return 0;
1609 }
1610
1611 static void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer,
1612                                     int unitid)
1613 {
1614         usb_mixer_elem_info_t *info;
1615
1616         for (info = mixer->id_elems[unitid]; info; info = info->next_id_elem)
1617                 snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
1618                                info->elem_id);
1619 }
1620
1621 static void snd_usb_mixer_memory_change(struct usb_mixer_interface *mixer,
1622                                         int unitid)
1623 {
1624         if (mixer->rc_type == RC_NONE)
1625                 return;
1626         /* unit ids specific to Extigy/Audigy 2 NX: */
1627         switch (unitid) {
1628         case 0: /* remote control */
1629                 mixer->rc_urb->dev = mixer->chip->dev;
1630                 usb_submit_urb(mixer->rc_urb, GFP_ATOMIC);
1631                 break;
1632         case 4: /* digital in jack */
1633         case 7: /* line in jacks */
1634         case 19: /* speaker out jacks */
1635         case 20: /* headphones out jack */
1636                 break;
1637         default:
1638                 snd_printd(KERN_DEBUG "memory change in unknown unit %d\n", unitid);
1639                 break;
1640         }
1641 }
1642
1643 static void snd_usb_mixer_status_complete(struct urb *urb, struct pt_regs *regs)
1644 {
1645         struct usb_mixer_interface *mixer = urb->context;
1646
1647         if (urb->status == 0) {
1648                 u8 *buf = urb->transfer_buffer;
1649                 int i;
1650
1651                 for (i = urb->actual_length; i >= 2; buf += 2, i -= 2) {
1652                         snd_printd(KERN_DEBUG "status interrupt: %02x %02x\n",
1653                                    buf[0], buf[1]);
1654                         /* ignore any notifications not from the control interface */
1655                         if ((buf[0] & 0x0f) != 0)
1656                                 continue;
1657                         if (!(buf[0] & 0x40))
1658                                 snd_usb_mixer_notify_id(mixer, buf[1]);
1659                         else
1660                                 snd_usb_mixer_memory_change(mixer, buf[1]);
1661                 }
1662         }
1663         if (urb->status != -ENOENT && urb->status != -ECONNRESET) {
1664                 urb->dev = mixer->chip->dev;
1665                 usb_submit_urb(urb, GFP_ATOMIC);
1666         }
1667 }
1668
1669 /* create the handler for the optional status interrupt endpoint */
1670 static int snd_usb_mixer_status_create(struct usb_mixer_interface *mixer)
1671 {
1672         struct usb_host_interface *hostif;
1673         struct usb_endpoint_descriptor *ep;
1674         void *transfer_buffer;
1675         int buffer_length;
1676         unsigned int epnum;
1677
1678         hostif = &usb_ifnum_to_if(mixer->chip->dev, mixer->ctrlif)->altsetting[0];
1679         /* we need one interrupt input endpoint */
1680         if (get_iface_desc(hostif)->bNumEndpoints < 1)
1681                 return 0;
1682         ep = get_endpoint(hostif, 0);
1683         if ((ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK) != USB_DIR_IN ||
1684             (ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_INT)
1685                 return 0;
1686
1687         epnum = ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
1688         buffer_length = le16_to_cpu(ep->wMaxPacketSize);
1689         transfer_buffer = kmalloc(buffer_length, GFP_KERNEL);
1690         if (!transfer_buffer)
1691                 return -ENOMEM;
1692         mixer->urb = usb_alloc_urb(0, GFP_KERNEL);
1693         if (!mixer->urb) {
1694                 kfree(transfer_buffer);
1695                 return -ENOMEM;
1696         }
1697         usb_fill_int_urb(mixer->urb, mixer->chip->dev,
1698                          usb_rcvintpipe(mixer->chip->dev, epnum),
1699                          transfer_buffer, buffer_length,
1700                          snd_usb_mixer_status_complete, mixer, ep->bInterval);
1701         usb_submit_urb(mixer->urb, GFP_KERNEL);
1702         return 0;
1703 }
1704
1705 static void snd_usb_soundblaster_remote_complete(struct urb *urb,
1706                                                  struct pt_regs *regs)
1707 {
1708         struct usb_mixer_interface *mixer = urb->context;
1709         /*
1710          * format of remote control data:
1711          * Extigy:      xx 00
1712          * Audigy 2 NX: 06 80 xx 00 00 00
1713          */
1714         int offset = mixer->rc_type == RC_EXTIGY ? 0 : 2;
1715         u32 code;
1716
1717         if (urb->status < 0 || urb->actual_length <= offset)
1718                 return;
1719         code = mixer->rc_buffer[offset];
1720         /* the Mute button actually changes the mixer control */
1721         if (code == 13)
1722                 snd_usb_mixer_notify_id(mixer, 18);
1723         mixer->rc_code = code;
1724         wmb();
1725         wake_up(&mixer->rc_waitq);
1726 }
1727
1728 static int snd_usb_sbrc_hwdep_open(snd_hwdep_t *hw, struct file *file)
1729 {
1730         struct usb_mixer_interface *mixer = hw->private_data;
1731
1732         if (test_and_set_bit(0, &mixer->rc_hwdep_open))
1733                 return -EBUSY;
1734         return 0;
1735 }
1736
1737 static int snd_usb_sbrc_hwdep_release(snd_hwdep_t *hw, struct file *file)
1738 {
1739         struct usb_mixer_interface *mixer = hw->private_data;
1740
1741         clear_bit(0, &mixer->rc_hwdep_open);
1742         smp_mb__after_clear_bit();
1743         return 0;
1744 }
1745
1746 static long snd_usb_sbrc_hwdep_read(snd_hwdep_t *hw, char __user *buf,
1747                                      long count, loff_t *offset)
1748 {
1749         struct usb_mixer_interface *mixer = hw->private_data;
1750         int err;
1751         u32 rc_code;
1752
1753         if (count != 1 && count != 4)
1754                 return -EINVAL;
1755         err = wait_event_interruptible(mixer->rc_waitq,
1756                                        (rc_code = xchg(&mixer->rc_code, 0)) != 0);
1757         if (err == 0) {
1758                 if (count == 1)
1759                         err = put_user(rc_code, buf);
1760                 else
1761                         err = put_user(rc_code, (u32 __user *)buf);
1762         }
1763         return err < 0 ? err : count;
1764 }
1765
1766 static unsigned int snd_usb_sbrc_hwdep_poll(snd_hwdep_t *hw, struct file *file,
1767                                             poll_table *wait)
1768 {
1769         struct usb_mixer_interface *mixer = hw->private_data;
1770
1771         poll_wait(file, &mixer->rc_waitq, wait);
1772         return mixer->rc_code ? POLLIN | POLLRDNORM : 0;
1773 }
1774
1775 static int snd_usb_soundblaster_remote_init(struct usb_mixer_interface *mixer)
1776 {
1777         snd_hwdep_t *hwdep;
1778         int err, len;
1779
1780         switch (mixer->chip->usb_id) {
1781         case USB_ID(0x041e, 0x3000):
1782                 mixer->rc_type = RC_EXTIGY;
1783                 len = 2;
1784                 break;
1785         case USB_ID(0x041e, 0x3020):
1786                 mixer->rc_type = RC_AUDIGY2NX;
1787                 len = 6;
1788                 break;
1789         default:
1790                 return 0;
1791         }
1792
1793         init_waitqueue_head(&mixer->rc_waitq);
1794         err = snd_hwdep_new(mixer->chip->card, "SB remote control", 0, &hwdep);
1795         if (err < 0)
1796                 return err;
1797         snprintf(hwdep->name, sizeof(hwdep->name),
1798                  "%s remote control", mixer->chip->card->shortname);
1799         hwdep->iface = SNDRV_HWDEP_IFACE_SB_RC;
1800         hwdep->private_data = mixer;
1801         hwdep->ops.read = snd_usb_sbrc_hwdep_read;
1802         hwdep->ops.open = snd_usb_sbrc_hwdep_open;
1803         hwdep->ops.release = snd_usb_sbrc_hwdep_release;
1804         hwdep->ops.poll = snd_usb_sbrc_hwdep_poll;
1805
1806         mixer->rc_urb = usb_alloc_urb(0, GFP_KERNEL);
1807         if (!mixer->rc_urb)
1808                 return -ENOMEM;
1809         mixer->rc_setup_packet = kmalloc(sizeof(*mixer->rc_setup_packet), GFP_KERNEL);
1810         if (!mixer->rc_setup_packet) {
1811                 usb_free_urb(mixer->rc_urb);
1812                 mixer->rc_urb = NULL;
1813                 return -ENOMEM;
1814         }
1815         mixer->rc_setup_packet->bRequestType =
1816                 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE;
1817         mixer->rc_setup_packet->bRequest = GET_MEM;
1818         mixer->rc_setup_packet->wValue = cpu_to_le16(0);
1819         mixer->rc_setup_packet->wIndex = cpu_to_le16(0);
1820         mixer->rc_setup_packet->wLength = cpu_to_le16(len);
1821         usb_fill_control_urb(mixer->rc_urb, mixer->chip->dev,
1822                              usb_rcvctrlpipe(mixer->chip->dev, 0),
1823                              (u8*)mixer->rc_setup_packet, mixer->rc_buffer, len,
1824                              snd_usb_soundblaster_remote_complete, mixer);
1825         return 0;
1826 }
1827
1828 static int snd_audigy2nx_led_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *uinfo)
1829 {
1830         uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1831         uinfo->count = 1;
1832         uinfo->value.integer.min = 0;
1833         uinfo->value.integer.max = 1;
1834         return 0;
1835 }
1836
1837 static int snd_audigy2nx_led_get(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
1838 {
1839         struct usb_mixer_interface *mixer = snd_kcontrol_chip(kcontrol);
1840         int index = kcontrol->private_value;
1841
1842         ucontrol->value.integer.value[0] = mixer->audigy2nx_leds[index];
1843         return 0;
1844 }
1845
1846 static int snd_audigy2nx_led_put(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
1847 {
1848         struct usb_mixer_interface *mixer = snd_kcontrol_chip(kcontrol);
1849         int index = kcontrol->private_value;
1850         int value = ucontrol->value.integer.value[0];
1851         int err, changed;
1852
1853         if (value > 1)
1854                 return -EINVAL;
1855         changed = value != mixer->audigy2nx_leds[index];
1856         err = snd_usb_ctl_msg(mixer->chip->dev,
1857                               usb_sndctrlpipe(mixer->chip->dev, 0), 0x24,
1858                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
1859                               value, index + 2, NULL, 0, 100);
1860         if (err < 0)
1861                 return err;
1862         mixer->audigy2nx_leds[index] = value;
1863         return changed;
1864 }
1865
1866 static snd_kcontrol_new_t snd_audigy2nx_controls[] = {
1867         {
1868                 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1869                 .name = "CMSS LED Switch",
1870                 .info = snd_audigy2nx_led_info,
1871                 .get = snd_audigy2nx_led_get,
1872                 .put = snd_audigy2nx_led_put,
1873                 .private_value = 0,
1874         },
1875         {
1876                 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1877                 .name = "Power LED Switch",
1878                 .info = snd_audigy2nx_led_info,
1879                 .get = snd_audigy2nx_led_get,
1880                 .put = snd_audigy2nx_led_put,
1881                 .private_value = 1,
1882         },
1883         {
1884                 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1885                 .name = "Dolby Digital LED Switch",
1886                 .info = snd_audigy2nx_led_info,
1887                 .get = snd_audigy2nx_led_get,
1888                 .put = snd_audigy2nx_led_put,
1889                 .private_value = 2,
1890         },
1891 };
1892
1893 static int snd_audigy2nx_controls_create(struct usb_mixer_interface *mixer)
1894 {
1895         int i, err;
1896
1897         for (i = 0; i < ARRAY_SIZE(snd_audigy2nx_controls); ++i) {
1898                 err = snd_ctl_add(mixer->chip->card,
1899                                   snd_ctl_new1(&snd_audigy2nx_controls[i], mixer));
1900                 if (err < 0)
1901                         return err;
1902         }
1903         mixer->audigy2nx_leds[1] = 1; /* Power LED is on by default */
1904         return 0;
1905 }
1906
1907 static void snd_audigy2nx_proc_read(snd_info_entry_t *entry,
1908                                     snd_info_buffer_t *buffer)
1909 {
1910         static const struct {
1911                 int unitid;
1912                 const char *name;
1913         } jacks[] = {
1914                 {4,  "dig in "},
1915                 {7,  "line in"},
1916                 {19, "spk out"},
1917                 {20, "hph out"},
1918         };
1919         struct usb_mixer_interface *mixer = entry->private_data;
1920         int i, err;
1921         u8 buf[3];
1922
1923         snd_iprintf(buffer, "%s jacks\n\n", mixer->chip->card->shortname);
1924         for (i = 0; i < ARRAY_SIZE(jacks); ++i) {
1925                 snd_iprintf(buffer, "%s: ", jacks[i].name);
1926                 err = snd_usb_ctl_msg(mixer->chip->dev,
1927                                       usb_rcvctrlpipe(mixer->chip->dev, 0),
1928                                       GET_MEM, USB_DIR_IN | USB_TYPE_CLASS |
1929                                       USB_RECIP_INTERFACE, 0,
1930                                       jacks[i].unitid << 8, buf, 3, 100);
1931                 if (err == 3 && buf[0] == 3)
1932                         snd_iprintf(buffer, "%02x %02x\n", buf[1], buf[2]);
1933                 else
1934                         snd_iprintf(buffer, "?\n");
1935         }
1936 }
1937
1938 int snd_usb_create_mixer(snd_usb_audio_t *chip, int ctrlif)
1939 {
1940         static snd_device_ops_t dev_ops = {
1941                 .dev_free = snd_usb_mixer_dev_free
1942         };
1943         struct usb_mixer_interface *mixer;
1944         int err;
1945
1946         strcpy(chip->card->mixername, "USB Mixer");
1947
1948         mixer = kcalloc(1, sizeof(*mixer), GFP_KERNEL);
1949         if (!mixer)
1950                 return -ENOMEM;
1951         mixer->chip = chip;
1952         mixer->ctrlif = ctrlif;
1953 #ifdef IGNORE_CTL_ERROR
1954         mixer->ignore_ctl_error = 1;
1955 #endif
1956         mixer->id_elems = kcalloc(256, sizeof(*mixer->id_elems), GFP_KERNEL);
1957         if (!mixer->id_elems) {
1958                 kfree(mixer);
1959                 return -ENOMEM;
1960         }
1961
1962         if ((err = snd_usb_mixer_controls(mixer)) < 0 ||
1963             (err = snd_usb_mixer_status_create(mixer)) < 0)
1964                 goto _error;
1965
1966         if ((err = snd_usb_soundblaster_remote_init(mixer)) < 0)
1967                 goto _error;
1968
1969         if (mixer->chip->usb_id == USB_ID(0x041e, 0x3020)) {
1970                 snd_info_entry_t *entry;
1971
1972                 if ((err = snd_audigy2nx_controls_create(mixer)) < 0)
1973                         goto _error;
1974                 if (!snd_card_proc_new(chip->card, "audigy2nx", &entry))
1975                         snd_info_set_text_ops(entry, mixer, 1024,
1976                                               snd_audigy2nx_proc_read);
1977         }
1978
1979         err = snd_device_new(chip->card, SNDRV_DEV_LOWLEVEL, mixer, &dev_ops);
1980         if (err < 0)
1981                 goto _error;
1982         list_add(&mixer->list, &chip->mixer_list);
1983         return 0;
1984
1985 _error:
1986         snd_usb_mixer_free(mixer);
1987         return err;
1988 }
1989
1990 void snd_usb_mixer_disconnect(struct list_head *p)
1991 {
1992         struct usb_mixer_interface *mixer;
1993         
1994         mixer = list_entry(p, struct usb_mixer_interface, list);
1995         if (mixer->urb)
1996                 usb_kill_urb(mixer->urb);
1997         if (mixer->rc_urb)
1998                 usb_kill_urb(mixer->rc_urb);
1999 }