2 * (Tentative) USB Audio Driver for ALSA
6 * Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
8 * Many codes borrowed from audio.c by
9 * Alan Cox (alan@lxorguk.ukuu.org.uk)
10 * Thomas Sailer (sailer@ife.ee.ethz.ch)
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.
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.
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
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>
45 /* ignore error from controls - for debugging */
46 /* #define IGNORE_CTL_ERROR */
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;
53 struct usb_audio_term {
57 unsigned int chconfig;
61 struct usbmix_name_map;
63 struct usb_mixer_build {
64 snd_usb_audio_t *chip;
65 unsigned char *buffer;
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;
75 struct usb_mixer_elem_info {
76 snd_usb_audio_t *chip;
79 unsigned int control; /* CS or ICN (high byte) */
80 unsigned int cmask; /* channel mask bitmap: 0 = master */
84 unsigned int initialized: 1;
98 USB_FEATURE_BASSBOOST,
104 USB_MIXER_INV_BOOLEAN,
113 USB_PROC_UPDOWN_SWITCH = 1,
114 USB_PROC_UPDOWN_MODE_SEL = 2,
116 USB_PROC_PROLOGIC = 2,
117 USB_PROC_PROLOGIC_SWITCH = 1,
118 USB_PROC_PROLOGIC_MODE_SEL = 2,
121 USB_PROC_3DENH_SWITCH = 1,
122 USB_PROC_3DENH_SPACE = 2,
125 USB_PROC_REVERB_SWITCH = 1,
126 USB_PROC_REVERB_LEVEL = 2,
127 USB_PROC_REVERB_TIME = 3,
128 USB_PROC_REVERB_DELAY = 4,
131 USB_PROC_CHORUS_SWITCH = 1,
132 USB_PROC_CHORUS_LEVEL = 2,
133 USB_PROC_CHORUS_RATE = 3,
134 USB_PROC_CHORUS_DEPTH = 4,
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,
145 #define MAX_CHANNELS 10 /* max logical channels */
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.
153 #include "usbmixer_maps.c"
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)
158 const struct usbmix_name_map *p;
163 for (p = state->map; p->id; p++) {
164 if (p->id == unitid && p->name &&
165 (! control || ! p->control || control == p->control)) {
167 return strlcpy(buf, p->name, buflen);
173 /* check whether the control should be ignored */
174 static int check_ignored_ctl(mixer_build_t *state, int unitid, int control)
176 const struct usbmix_name_map *p;
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);
191 * find an audio control unit with the given unit id
193 static void *find_audio_control_unit(mixer_build_t *state, unsigned char unit)
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)
208 * copy a string with the given id
210 static int snd_usb_copy_string_desc(mixer_build_t *state, int index, char *buf, int maxlen)
212 int len = usb_string(state->chip->dev, index, buf, maxlen - 1);
218 * convert from the byte/word on usb descriptor to the zero-based integer
220 static int convert_signed_value(usb_mixer_elem_info_t *cval, int val)
222 switch (cval->val_type) {
223 case USB_MIXER_BOOLEAN:
225 case USB_MIXER_INV_BOOLEAN:
248 * convert from the zero-based int to the byte/word for usb descriptor
250 static int convert_bytes_value(usb_mixer_elem_info_t *cval, int val)
252 switch (cval->val_type) {
253 case USB_MIXER_BOOLEAN:
255 case USB_MIXER_INV_BOOLEAN:
264 return 0; /* not reached */
267 static int get_relative_value(usb_mixer_elem_info_t *cval, int val)
273 else if (val > cval->max)
274 return (cval->max - cval->min) / cval->res;
276 return (val - cval->min) / cval->res;
279 static int get_abs_value(usb_mixer_elem_info_t *cval, int val)
294 * retrieve a mixer value
297 static int get_ctl_value(usb_mixer_elem_info_t *cval, int request, int validx, int *value_ret)
299 unsigned char buf[2];
300 int val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1;
303 while (timeout-- > 0) {
304 if (snd_usb_ctl_msg(cval->chip->dev, usb_rcvctrlpipe(cval->chip->dev, 0),
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));
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);
317 static int get_cur_ctl_value(usb_mixer_elem_info_t *cval, int validx, int *value)
319 return get_ctl_value(cval, GET_CUR, validx, value);
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)
325 return get_ctl_value(cval, GET_CUR, (cval->control << 8) | channel, value);
332 static int set_ctl_value(usb_mixer_elem_info_t *cval, int request, int validx, int value_set)
334 unsigned char buf[2];
335 int val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1;
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),
344 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
345 validx, cval->ctrlif | (cval->id << 8),
346 buf, val_len, 100) >= 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]);
352 static int set_cur_ctl_value(usb_mixer_elem_info_t *cval, int validx, int value)
354 return set_ctl_value(cval, SET_CUR, validx, value);
357 inline static int set_cur_mix_value(usb_mixer_elem_info_t *cval, int channel, int value)
359 return set_ctl_value(cval, SET_CUR, (cval->control << 8) | channel, value);
364 * parser routines begin here...
367 static int parse_audio_unit(mixer_build_t *state, int unitid);
371 * check if the input/output channel routing is enabled on the given bitmap.
372 * used for mixer unit parser
374 static int check_matrix_bitmap(unsigned char *bmap, int ich, int och, int num_outs)
376 int idx = ich * num_outs + och;
377 return bmap[idx >> 3] & (0x80 >> (idx & 7));
382 * add an alsa control element
383 * search and increment the index until an empty slot is found.
385 * if failed, give up and free the control instance.
388 static int add_control_to_empty(snd_card_t *card, snd_kcontrol_t *kctl)
391 while (snd_ctl_find_id(card, &kctl->id))
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);
402 * get a terminal name string
405 static struct iterm_name_combo {
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" },
417 { 0x0600, "External In" },
418 { 0x0601, "Analog In" },
419 { 0x0602, "Digital In" },
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" },
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" },
448 static int get_term_name(mixer_build_t *state, usb_audio_term_t *iterm,
449 unsigned char *name, int maxlen, int term_only)
451 struct iterm_name_combo *names;
454 return snd_usb_copy_string_desc(state, iterm->name, name, maxlen);
456 /* virtual type - not a real terminal */
457 if (iterm->type >> 16) {
460 switch (iterm->type >> 16) {
462 strcpy(name, "Selector"); return 8;
463 case PROCESSING_UNIT:
464 strcpy(name, "Process Unit"); return 12;
466 strcpy(name, "Ext Unit"); return 8;
468 strcpy(name, "Mixer"); return 5;
470 return sprintf(name, "Unit %d", iterm->id);
474 switch (iterm->type & 0xff00) {
476 strcpy(name, "PCM"); return 3;
478 strcpy(name, "Mic"); return 3;
480 strcpy(name, "Headset"); return 7;
482 strcpy(name, "Phone"); return 5;
485 for (names = iterm_names; names->type; names++)
486 if (names->type == iterm->type) {
487 strcpy(name, names->name);
488 return strlen(names->name);
495 * parse the source unit recursively until it reaches to a terminal
496 * or a branched unit.
498 static int check_input_term(mixer_build_t *state, int id, usb_audio_term_t *term)
502 memset(term, 0, sizeof(*term));
503 while ((p1 = find_audio_control_unit(state, id)) != NULL) {
507 term->type = combine_word(p1 + 4);
508 term->channels = p1[7];
509 term->chconfig = combine_word(p1 + 8);
514 break; /* continue to parse */
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];
522 /* call recursively to retrieve the channel info */
523 if (check_input_term(state, p1[5], term) < 0)
525 term->type = p1[2] << 16; /* virtual type */
527 term->name = p1[9 + p1[0] - 1];
529 case PROCESSING_UNIT:
533 break; /* continue to parse */
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]]];
552 /* feature unit control information */
553 struct usb_feature_control_info {
555 unsigned int type; /* control type (mute, volume, etc.) */
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 },
572 /* private_free callback */
573 static void usb_mixer_elem_free(snd_kcontrol_t *kctl)
575 if (kctl->private_data) {
576 kfree(kctl->private_data);
577 kctl->private_data = NULL;
583 * interface to ALSA control for feature/mixer units
587 * retrieve the minimum and maximum values for the specified control
589 static int get_min_max(usb_mixer_elem_info_t *cval, int default_min)
592 cval->min = default_min;
593 cval->max = cval->min + 1;
596 if (cval->val_type == USB_MIXER_BOOLEAN ||
597 cval->val_type == USB_MIXER_INV_BOOLEAN) {
598 cval->initialized = 1;
603 for (i = 0; i < MAX_CHANNELS; i++)
604 if (cval->cmask & (1 << i)) {
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);
614 if (get_ctl_value(cval, GET_RES, (cval->control << 8) | minchn, &cval->res) < 0) {
617 int last_valid_res = cval->res;
619 while (cval->res > 1) {
620 if (set_ctl_value(cval, SET_RES, (cval->control << 8) | minchn, cval->res / 2) < 0)
624 if (get_ctl_value(cval, GET_RES, (cval->control << 8) | minchn, &cval->res) < 0)
625 cval->res = last_valid_res;
629 cval->initialized = 1;
635 /* get a feature/mixer unit info */
636 static int mixer_ctl_feature_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *uinfo)
638 usb_mixer_elem_info_t *cval = kcontrol->private_data;
640 if (cval->val_type == USB_MIXER_BOOLEAN ||
641 cval->val_type == USB_MIXER_INV_BOOLEAN)
642 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
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;
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;
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)
662 usb_mixer_elem_info_t *cval = kcontrol->private_data;
663 int c, cnt, val, err;
667 for (c = 0; c < MAX_CHANNELS; c++) {
668 if (cval->cmask & (1 << c)) {
669 err = get_cur_mix_value(cval, c + 1, &val);
671 if (cval->chip->ignore_ctl_error) {
672 ucontrol->value.integer.value[0] = cval->min;
675 snd_printd(KERN_ERR "cannot get current value for control %d ch %d: err = %d\n", cval->control, c + 1, err);
678 val = get_relative_value(cval, val);
679 ucontrol->value.integer.value[cnt] = val;
685 err = get_cur_mix_value(cval, 0, &val);
687 if (cval->chip->ignore_ctl_error) {
688 ucontrol->value.integer.value[0] = cval->min;
691 snd_printd(KERN_ERR "cannot get current value for control %d master ch: err = %d\n", cval->control, err);
694 val = get_relative_value(cval, val);
695 ucontrol->value.integer.value[0] = val;
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)
703 usb_mixer_elem_info_t *cval = kcontrol->private_data;
704 int c, cnt, val, oval, err;
709 for (c = 0; c < MAX_CHANNELS; c++) {
710 if (cval->cmask & (1 << c)) {
711 err = get_cur_mix_value(cval, c + 1, &oval);
713 if (cval->chip->ignore_ctl_error)
717 val = ucontrol->value.integer.value[cnt];
718 val = get_abs_value(cval, val);
720 set_cur_mix_value(cval, c + 1, val);
723 get_cur_mix_value(cval, c + 1, &val);
729 err = get_cur_mix_value(cval, 0, &oval);
730 if (err < 0 && cval->chip->ignore_ctl_error)
734 val = ucontrol->value.integer.value[0];
735 val = get_abs_value(cval, val);
737 set_cur_mix_value(cval, 0, val);
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,
754 * build a feature control
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)
761 unsigned int len = 0;
763 int nameid = desc[desc[0] - 1];
764 snd_kcontrol_t *kctl;
765 usb_mixer_elem_info_t *cval;
767 control++; /* change from zero-based to 1-based value */
769 if (control == USB_FEATURE_GEQ) {
770 /* FIXME: not supported yet */
774 if (check_ignored_ctl(state, unitid, control))
777 cval = kcalloc(1, sizeof(*cval), GFP_KERNEL);
779 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
782 cval->chip = state->chip;
783 cval->ctrlif = state->ctrlif;
785 cval->control = control;
786 cval->cmask = ctl_mask;
787 cval->val_type = audio_feature_info[control-1].type;
789 cval->channels = 1; /* master channel */
792 for (i = 0; i < 16; i++)
793 if (ctl_mask & (1 << i))
798 /* get min/max values */
799 get_min_max(cval, 0);
801 kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval);
803 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
807 kctl->private_free = usb_mixer_elem_free;
809 len = check_mapped_name(state, unitid, control, kctl->id.name, sizeof(kctl->id.name));
810 mapped_name = len != 0;
812 len = snd_usb_copy_string_desc(state, nameid, kctl->id.name, sizeof(kctl->id.name));
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
821 * - if the connected output can be determined, use it.
822 * - otherwise, anonymous name.
825 len = get_term_name(state, iterm, kctl->id.name, sizeof(kctl->id.name), 1);
827 len = get_term_name(state, &state->oterm, kctl->id.name, sizeof(kctl->id.name), 1);
829 len = snprintf(kctl->id.name, sizeof(kctl->id.name),
830 "Feature %d", unitid);
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 :)
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));
840 len = strlcat(kctl->id.name + len, " Playback", sizeof(kctl->id.name));
843 strlcat(kctl->id.name + len, control == USB_FEATURE_MUTE ? " Switch" : " Volume",
844 sizeof(kctl->id.name));
849 strlcpy(kctl->id.name, audio_feature_info[control-1].name,
850 sizeof(kctl->id.name));
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");
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);
873 * parse a feature unit
875 * most of controlls are defined here.
877 static int parse_audio_feature_unit(mixer_build_t *state, int unitid, unsigned char *ftr)
880 usb_audio_term_t iterm;
881 unsigned int master_bits, first_ch_bits;
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);
889 /* parse the source unit */
890 if ((err = parse_audio_unit(state, ftr[4])) < 0)
893 /* determine the input source type and name */
894 if (check_input_term(state, ftr[4], &iterm) < 0)
897 channels = (ftr[0] - 7) / csize - 1;
899 master_bits = snd_usb_combine_bytes(ftr + 6, csize);
901 first_ch_bits = snd_usb_combine_bytes(ftr + 6 + csize, csize);
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);
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);
927 * build a mixer unit control
929 * the callbacks are identical with feature unit.
930 * input channel number (zero based) is given in control field instead.
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)
937 usb_mixer_elem_info_t *cval;
938 unsigned int input_pins = desc[4];
939 unsigned int num_outs = desc[5 + input_pins];
941 snd_kcontrol_t *kctl;
943 if (check_ignored_ctl(state, unitid, 0))
946 cval = kcalloc(1, sizeof(*cval), GFP_KERNEL);
950 cval->chip = state->chip;
951 cval->ctrlif = state->ctrlif;
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);
962 /* get min/max values */
963 get_min_max(cval, 0);
965 kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval);
967 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
971 kctl->private_free = usb_mixer_elem_free;
973 len = check_mapped_name(state, unitid, 0, kctl->id.name, sizeof(kctl->id.name));
975 len = get_term_name(state, iterm, kctl->id.name, sizeof(kctl->id.name), 0);
977 len = sprintf(kctl->id.name, "Mixer Source %d", in_ch + 1);
978 strlcat(kctl->id.name + len, " Volume", sizeof(kctl->id.name));
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);
989 static int parse_audio_mixer_unit(mixer_build_t *state, int unitid, unsigned char *desc)
991 usb_audio_term_t iterm;
992 int input_pins, num_ins, num_outs;
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);
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);
1007 for (pin = 0; pin < input_pins; pin++) {
1008 err = parse_audio_unit(state, desc[5 + pin]);
1011 err = check_input_term(state, desc[5 + pin], &iterm);
1014 num_ins += iterm.channels;
1015 for (; ich < num_ins; ++ich) {
1016 int och, ich_has_controls = 0;
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;
1025 if (ich_has_controls)
1026 build_mixer_unit_ctl(state, desc, pin, ich,
1035 * Processing Unit / Extension Unit
1038 /* get callback for processing/extension unit */
1039 static int mixer_ctl_procunit_get(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
1041 usb_mixer_elem_info_t *cval = kcontrol->private_data;
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;
1051 val = get_relative_value(cval, val);
1052 ucontrol->value.integer.value[0] = val;
1056 /* put callback for processing/extension unit */
1057 static int mixer_ctl_procunit_put(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
1059 usb_mixer_elem_info_t *cval = kcontrol->private_data;
1062 err = get_cur_ctl_value(cval, cval->control << 8, &oval);
1064 if (cval->chip->ignore_ctl_error)
1068 val = ucontrol->value.integer.value[0];
1069 val = get_abs_value(cval, val);
1071 set_cur_ctl_value(cval, cval->control << 8, val);
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,
1088 * predefined data for processing units
1090 struct procunit_value_info {
1097 struct procunit_info {
1100 struct procunit_value_info *values;
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 },
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 },
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 },
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 },
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 },
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 },
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 },
1153 * build a processing/extension unit
1155 static int build_audio_procunit(mixer_build_t *state, int unitid, unsigned char *dsc, struct procunit_info *list, char *name)
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 },
1167 static struct procunit_info default_info = {
1168 0, NULL, default_value_info
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);
1176 for (i = 0; i < num_ins; i++) {
1177 if ((err = parse_audio_unit(state, dsc[7 + i])) < 0)
1181 type = combine_word(&dsc[4]);
1183 return 0; /* undefined? */
1185 for (info = list; info && info->type; info++)
1186 if (info->type == type)
1188 if (! info || ! info->type)
1189 info = &default_info;
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))))
1195 if (check_ignored_ctl(state, unitid, valinfo->control))
1197 cval = kcalloc(1, sizeof(*cval), GFP_KERNEL);
1199 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
1202 cval->chip = state->chip;
1203 cval->ctrlif = state->ctrlif;
1205 cval->control = valinfo->control;
1206 cval->val_type = valinfo->val_type;
1209 /* get min/max values */
1210 if (type == USB_PROC_UPDOWN && cval->control == USB_PROC_UPDOWN_MODE_SEL) {
1211 /* FIXME: hard-coded */
1213 cval->max = dsc[15];
1215 cval->initialized = 1;
1217 get_min_max(cval, valinfo->min_value);
1219 kctl = snd_ctl_new1(&mixer_procunit_ctl, cval);
1221 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
1225 kctl->private_free = usb_mixer_elem_free;
1227 if (check_mapped_name(state, unitid, cval->control, kctl->id.name, sizeof(kctl->id.name)))
1229 else if (info->name)
1230 strlcpy(kctl->id.name, info->name, sizeof(kctl->id.name));
1232 nameid = dsc[12 + num_ins + dsc[11 + num_ins]];
1235 len = snd_usb_copy_string_desc(state, nameid, kctl->id.name, sizeof(kctl->id.name));
1237 strlcpy(kctl->id.name, name, sizeof(kctl->id.name));
1239 strlcat(kctl->id.name, " ", sizeof(kctl->id.name));
1240 strlcat(kctl->id.name, valinfo->suffix, sizeof(kctl->id.name));
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)
1251 static int parse_audio_processing_unit(mixer_build_t *state, int unitid, unsigned char *desc)
1253 return build_audio_procunit(state, unitid, desc, procunits, "Processing Unit");
1256 static int parse_audio_extension_unit(mixer_build_t *state, int unitid, unsigned char *desc)
1258 return build_audio_procunit(state, unitid, desc, NULL, "Extension Unit");
1266 /* info callback for selector unit
1267 * use an enumerator type for routing
1269 static int mixer_ctl_selector_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *uinfo)
1271 usb_mixer_elem_info_t *cval = kcontrol->private_data;
1272 char **itemlist = (char **)kcontrol->private_value;
1274 snd_assert(itemlist, return -EINVAL);
1275 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
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]);
1284 /* get callback for selector unit */
1285 static int mixer_ctl_selector_get(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
1287 usb_mixer_elem_info_t *cval = kcontrol->private_data;
1290 err = get_cur_ctl_value(cval, 0, &val);
1292 if (cval->chip->ignore_ctl_error) {
1293 ucontrol->value.enumerated.item[0] = 0;
1298 val = get_relative_value(cval, val);
1299 ucontrol->value.enumerated.item[0] = val;
1303 /* put callback for selector unit */
1304 static int mixer_ctl_selector_put(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
1306 usb_mixer_elem_info_t *cval = kcontrol->private_data;
1309 err = get_cur_ctl_value(cval, 0, &oval);
1311 if (cval->chip->ignore_ctl_error)
1315 val = ucontrol->value.enumerated.item[0];
1316 val = get_abs_value(cval, val);
1318 set_cur_ctl_value(cval, 0, val);
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,
1334 /* private free callback.
1335 * free both private_data and private_value
1337 static void usb_mixer_selector_elem_free(snd_kcontrol_t *kctl)
1341 if (kctl->private_data) {
1342 usb_mixer_elem_info_t *cval = kctl->private_data;
1343 num_ins = cval->max;
1345 kctl->private_data = NULL;
1347 if (kctl->private_value) {
1348 char **itemlist = (char **)kctl->private_value;
1349 for (i = 0; i < num_ins; i++)
1352 kctl->private_value = 0;
1357 * parse a selector unit
1359 static int parse_audio_selector_unit(mixer_build_t *state, int unitid, unsigned char *desc)
1361 unsigned int num_ins = desc[4];
1362 unsigned int i, nameid, len;
1364 usb_mixer_elem_info_t *cval;
1365 snd_kcontrol_t *kctl;
1368 if (! num_ins || desc[0] < 6 + num_ins) {
1369 snd_printk(KERN_ERR "invalid SELECTOR UNIT descriptor %d\n", unitid);
1373 for (i = 0; i < num_ins; i++) {
1374 if ((err = parse_audio_unit(state, desc[5 + i])) < 0)
1378 if (num_ins == 1) /* only one ? nonsense! */
1381 if (check_ignored_ctl(state, unitid, 0))
1384 cval = kcalloc(1, sizeof(*cval), GFP_KERNEL);
1386 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
1389 cval->chip = state->chip;
1390 cval->ctrlif = state->ctrlif;
1392 cval->val_type = USB_MIXER_U8;
1395 cval->max = num_ins;
1397 cval->initialized = 1;
1399 namelist = kmalloc(sizeof(char *) * num_ins, GFP_KERNEL);
1401 snd_printk(KERN_ERR "cannot malloc\n");
1405 #define MAX_ITEM_NAME_LEN 64
1406 for (i = 0; i < num_ins; i++) {
1407 usb_audio_term_t iterm;
1409 namelist[i] = kmalloc(MAX_ITEM_NAME_LEN, GFP_KERNEL);
1410 if (! namelist[i]) {
1411 snd_printk(KERN_ERR "cannot malloc\n");
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);
1421 sprintf(namelist[i], "Input %d", i);
1424 kctl = snd_ctl_new1(&mixer_selectunit_ctl, cval);
1426 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
1430 kctl->private_value = (unsigned long)namelist;
1431 kctl->private_free = usb_mixer_selector_elem_free;
1433 nameid = desc[desc[0] - 1];
1434 len = check_mapped_name(state, unitid, 0, kctl->id.name, sizeof(kctl->id.name));
1438 snd_usb_copy_string_desc(state, nameid, kctl->id.name, sizeof(kctl->id.name));
1440 len = get_term_name(state, &state->oterm,
1441 kctl->id.name, sizeof(kctl->id.name), 0);
1443 strlcpy(kctl->id.name, "USB", sizeof(kctl->id.name));
1445 if ((state->oterm.type & 0xff00) == 0x0100)
1446 strlcat(kctl->id.name, " Capture Source", sizeof(kctl->id.name));
1448 strlcat(kctl->id.name, " Playback Source", sizeof(kctl->id.name));
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)
1461 * parse an audio unit recursively
1464 static int parse_audio_unit(mixer_build_t *state, int unitid)
1468 if (test_and_set_bit(unitid, state->unitbitmap))
1469 return 0; /* the unit already visited */
1471 p1 = find_audio_control_unit(state, unitid);
1473 snd_printk(KERN_ERR "usbaudio: unit %d not found!\n", unitid);
1478 case INPUT_TERMINAL:
1481 return parse_audio_mixer_unit(state, unitid, p1);
1483 return parse_audio_selector_unit(state, unitid, p1);
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);
1491 snd_printk(KERN_ERR "usbaudio: unit %u: unexpected type 0x%02x\n", unitid, p1[2]);
1497 * create mixer controls
1499 * walk through all OUTPUT_TERMINAL descriptors to search for mixers
1501 int snd_usb_create_mixer(snd_usb_audio_t *chip, int ctrlif)
1503 unsigned char *desc;
1504 mixer_build_t state;
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];
1510 strcpy(chip->card->mixername, "USB Mixer");
1512 memset(&state, 0, sizeof(state));
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);
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;
1528 #ifdef IGNORE_CTL_ERROR
1529 chip->ignore_ctl_error = 1;
1533 while ((desc = snd_usb_find_csint_desc(hostif->extra, hostif->extralen, desc, OUTPUT_TERMINAL)) != NULL) {
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]);