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
30 * TODOs, for both the mixer and the streaming interfaces:
32 * - support for UAC2 effect units
33 * - support for graphical equalizers
34 * - RANGE and MEM set commands (UAC2)
35 * - RANGE and MEM interrupt dispatchers (UAC2)
36 * - audio channel clustering (UAC2)
37 * - audio sample rate converter units (UAC2)
38 * - proper handling of clock multipliers (UAC2)
39 * - dispatch clock change notifications (UAC2)
40 * - stop PCM streams which use a clock that became invalid
41 * - stop PCM streams which use a clock selector that has changed
42 * - parse available sample rates again when clock sources changed
45 #include <linux/bitops.h>
46 #include <linux/init.h>
47 #include <linux/list.h>
48 #include <linux/slab.h>
49 #include <linux/string.h>
50 #include <linux/usb.h>
51 #include <linux/usb/audio.h>
52 #include <linux/usb/audio-v2.h>
54 #include <sound/core.h>
55 #include <sound/control.h>
56 #include <sound/hwdep.h>
57 #include <sound/info.h>
58 #include <sound/tlv.h>
63 #include "mixer_quirks.h"
66 #define MAX_ID_ELEMS 256
68 struct usb_audio_term {
72 unsigned int chconfig;
76 struct usbmix_name_map;
79 struct snd_usb_audio *chip;
80 struct usb_mixer_interface *mixer;
81 unsigned char *buffer;
83 DECLARE_BITMAP(unitbitmap, MAX_ID_ELEMS);
84 struct usb_audio_term oterm;
85 const struct usbmix_name_map *map;
86 const struct usbmix_selector_map *selector_map;
89 /*E-mu 0202/0404/0204 eXtension Unit(XU) control*/
91 USB_XU_CLOCK_RATE = 0xe301,
92 USB_XU_CLOCK_SOURCE = 0xe302,
93 USB_XU_DIGITAL_IO_STATUS = 0xe303,
94 USB_XU_DEVICE_OPTIONS = 0xe304,
95 USB_XU_DIRECT_MONITORING = 0xe305,
96 USB_XU_METERING = 0xe306
99 USB_XU_CLOCK_SOURCE_SELECTOR = 0x02, /* clock source*/
100 USB_XU_CLOCK_RATE_SELECTOR = 0x03, /* clock rate */
101 USB_XU_DIGITAL_FORMAT_SELECTOR = 0x01, /* the spdif format */
102 USB_XU_SOFT_LIMIT_SELECTOR = 0x03 /* soft limiter */
106 * manual mapping of mixer names
107 * if the mixer topology is too complicated and the parsed names are
108 * ambiguous, add the entries in usbmixer_maps.c.
110 #include "mixer_maps.c"
112 static const struct usbmix_name_map *
113 find_map(struct mixer_build *state, int unitid, int control)
115 const struct usbmix_name_map *p = state->map;
120 for (p = state->map; p->id; p++) {
121 if (p->id == unitid &&
122 (!control || !p->control || control == p->control))
128 /* get the mapped name if the unit matches */
130 check_mapped_name(const struct usbmix_name_map *p, char *buf, int buflen)
136 return strlcpy(buf, p->name, buflen);
139 /* check whether the control should be ignored */
141 check_ignored_ctl(const struct usbmix_name_map *p)
143 if (!p || p->name || p->dB)
149 static inline void check_mapped_dB(const struct usbmix_name_map *p,
150 struct usb_mixer_elem_info *cval)
153 cval->dBmin = p->dB->min;
154 cval->dBmax = p->dB->max;
155 cval->initialized = 1;
159 /* get the mapped selector source name */
160 static int check_mapped_selector_name(struct mixer_build *state, int unitid,
161 int index, char *buf, int buflen)
163 const struct usbmix_selector_map *p;
165 if (! state->selector_map)
167 for (p = state->selector_map; p->id; p++) {
168 if (p->id == unitid && index < p->count)
169 return strlcpy(buf, p->names[index], buflen);
175 * find an audio control unit with the given unit id
177 static void *find_audio_control_unit(struct mixer_build *state, unsigned char unit)
179 /* we just parse the header */
180 struct uac_feature_unit_descriptor *hdr = NULL;
182 while ((hdr = snd_usb_find_desc(state->buffer, state->buflen, hdr,
183 USB_DT_CS_INTERFACE)) != NULL) {
184 if (hdr->bLength >= 4 &&
185 hdr->bDescriptorSubtype >= UAC_INPUT_TERMINAL &&
186 hdr->bDescriptorSubtype <= UAC2_SAMPLE_RATE_CONVERTER &&
187 hdr->bUnitID == unit)
195 * copy a string with the given id
197 static int snd_usb_copy_string_desc(struct mixer_build *state, int index, char *buf, int maxlen)
199 int len = usb_string(state->chip->dev, index, buf, maxlen - 1);
205 * convert from the byte/word on usb descriptor to the zero-based integer
207 static int convert_signed_value(struct usb_mixer_elem_info *cval, int val)
209 switch (cval->val_type) {
210 case USB_MIXER_BOOLEAN:
212 case USB_MIXER_INV_BOOLEAN:
235 * convert from the zero-based int to the byte/word for usb descriptor
237 static int convert_bytes_value(struct usb_mixer_elem_info *cval, int val)
239 switch (cval->val_type) {
240 case USB_MIXER_BOOLEAN:
242 case USB_MIXER_INV_BOOLEAN:
251 return 0; /* not reached */
254 static int get_relative_value(struct usb_mixer_elem_info *cval, int val)
260 else if (val >= cval->max)
261 return (cval->max - cval->min + cval->res - 1) / cval->res;
263 return (val - cval->min) / cval->res;
266 static int get_abs_value(struct usb_mixer_elem_info *cval, int val)
281 * retrieve a mixer value
284 static int get_ctl_value_v1(struct usb_mixer_elem_info *cval, int request, int validx, int *value_ret)
286 struct snd_usb_audio *chip = cval->mixer->chip;
287 unsigned char buf[2];
288 int val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1;
292 err = snd_usb_autoresume(cval->mixer->chip);
295 down_read(&chip->shutdown_rwsem);
296 while (timeout-- > 0) {
299 idx = snd_usb_ctrl_intf(chip) | (cval->id << 8);
300 if (snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), request,
301 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
302 validx, idx, buf, val_len) >= val_len) {
303 *value_ret = convert_signed_value(cval, snd_usb_combine_bytes(buf, val_len));
308 snd_printdd(KERN_ERR "cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n",
309 request, validx, idx, cval->val_type);
313 up_read(&chip->shutdown_rwsem);
314 snd_usb_autosuspend(cval->mixer->chip);
318 static int get_ctl_value_v2(struct usb_mixer_elem_info *cval, int request, int validx, int *value_ret)
320 struct snd_usb_audio *chip = cval->mixer->chip;
321 unsigned char buf[2 + 3*sizeof(__u16)]; /* enough space for one range */
323 int idx = 0, ret, size;
326 if (request == UAC_GET_CUR) {
327 bRequest = UAC2_CS_CUR;
328 size = sizeof(__u16);
330 bRequest = UAC2_CS_RANGE;
334 memset(buf, 0, sizeof(buf));
336 ret = snd_usb_autoresume(chip) ? -EIO : 0;
340 down_read(&chip->shutdown_rwsem);
344 idx = snd_usb_ctrl_intf(chip) | (cval->id << 8);
345 ret = snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), bRequest,
346 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
347 validx, idx, buf, size);
349 up_read(&chip->shutdown_rwsem);
350 snd_usb_autosuspend(chip);
354 snd_printk(KERN_ERR "cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n",
355 request, validx, idx, cval->val_type);
359 /* FIXME: how should we handle multiple triplets here? */
366 val = buf + sizeof(__u16);
369 val = buf + sizeof(__u16) * 2;
372 val = buf + sizeof(__u16) * 3;
378 *value_ret = convert_signed_value(cval, snd_usb_combine_bytes(val, sizeof(__u16)));
383 static int get_ctl_value(struct usb_mixer_elem_info *cval, int request, int validx, int *value_ret)
385 return (cval->mixer->protocol == UAC_VERSION_1) ?
386 get_ctl_value_v1(cval, request, validx, value_ret) :
387 get_ctl_value_v2(cval, request, validx, value_ret);
390 static int get_cur_ctl_value(struct usb_mixer_elem_info *cval, int validx, int *value)
392 return get_ctl_value(cval, UAC_GET_CUR, validx, value);
395 /* channel = 0: master, 1 = first channel */
396 static inline int get_cur_mix_raw(struct usb_mixer_elem_info *cval,
397 int channel, int *value)
399 return get_ctl_value(cval, UAC_GET_CUR, (cval->control << 8) | channel, value);
402 static int get_cur_mix_value(struct usb_mixer_elem_info *cval,
403 int channel, int index, int *value)
407 if (cval->cached & (1 << channel)) {
408 *value = cval->cache_val[index];
411 err = get_cur_mix_raw(cval, channel, value);
413 if (!cval->mixer->ignore_ctl_error)
414 snd_printd(KERN_ERR "cannot get current value for control %d ch %d: err = %d\n",
415 cval->control, channel, err);
418 cval->cached |= 1 << channel;
419 cval->cache_val[index] = *value;
428 int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval,
429 int request, int validx, int value_set)
431 struct snd_usb_audio *chip = cval->mixer->chip;
432 unsigned char buf[2];
433 int idx = 0, val_len, err, timeout = 10;
435 if (cval->mixer->protocol == UAC_VERSION_1) {
436 val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1;
437 } else { /* UAC_VERSION_2 */
438 /* audio class v2 controls are always 2 bytes in size */
439 val_len = sizeof(__u16);
442 if (request != UAC_SET_CUR) {
443 snd_printdd(KERN_WARNING "RANGE setting not yet supported\n");
447 request = UAC2_CS_CUR;
450 value_set = convert_bytes_value(cval, value_set);
451 buf[0] = value_set & 0xff;
452 buf[1] = (value_set >> 8) & 0xff;
453 err = snd_usb_autoresume(chip);
456 down_read(&chip->shutdown_rwsem);
457 while (timeout-- > 0) {
460 idx = snd_usb_ctrl_intf(chip) | (cval->id << 8);
461 if (snd_usb_ctl_msg(chip->dev,
462 usb_sndctrlpipe(chip->dev, 0), request,
463 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
464 validx, idx, buf, val_len) >= 0) {
469 snd_printdd(KERN_ERR "cannot set ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d, data = %#x/%#x\n",
470 request, validx, idx, cval->val_type, buf[0], buf[1]);
474 up_read(&chip->shutdown_rwsem);
475 snd_usb_autosuspend(chip);
479 static int set_cur_ctl_value(struct usb_mixer_elem_info *cval, int validx, int value)
481 return snd_usb_mixer_set_ctl_value(cval, UAC_SET_CUR, validx, value);
484 static int set_cur_mix_value(struct usb_mixer_elem_info *cval, int channel,
485 int index, int value)
488 unsigned int read_only = (channel == 0) ?
489 cval->master_readonly :
490 cval->ch_readonly & (1 << (channel - 1));
493 snd_printdd(KERN_INFO "%s(): channel %d of control %d is read_only\n",
494 __func__, channel, cval->control);
498 err = snd_usb_mixer_set_ctl_value(cval, UAC_SET_CUR, (cval->control << 8) | channel,
502 cval->cached |= 1 << channel;
503 cval->cache_val[index] = value;
508 * TLV callback for mixer volume controls
510 static int mixer_vol_tlv(struct snd_kcontrol *kcontrol, int op_flag,
511 unsigned int size, unsigned int __user *_tlv)
513 struct usb_mixer_elem_info *cval = kcontrol->private_data;
514 DECLARE_TLV_DB_MINMAX(scale, 0, 0);
516 if (size < sizeof(scale))
518 scale[2] = cval->dBmin;
519 scale[3] = cval->dBmax;
520 if (copy_to_user(_tlv, scale, sizeof(scale)))
526 * parser routines begin here...
529 static int parse_audio_unit(struct mixer_build *state, int unitid);
533 * check if the input/output channel routing is enabled on the given bitmap.
534 * used for mixer unit parser
536 static int check_matrix_bitmap(unsigned char *bmap, int ich, int och, int num_outs)
538 int idx = ich * num_outs + och;
539 return bmap[idx >> 3] & (0x80 >> (idx & 7));
544 * add an alsa control element
545 * search and increment the index until an empty slot is found.
547 * if failed, give up and free the control instance.
550 int snd_usb_mixer_add_control(struct usb_mixer_interface *mixer,
551 struct snd_kcontrol *kctl)
553 struct usb_mixer_elem_info *cval = kctl->private_data;
556 while (snd_ctl_find_id(mixer->chip->card, &kctl->id))
558 if ((err = snd_ctl_add(mixer->chip->card, kctl)) < 0) {
559 snd_printd(KERN_ERR "cannot add control (err = %d)\n", err);
562 cval->elem_id = &kctl->id;
563 cval->next_id_elem = mixer->id_elems[cval->id];
564 mixer->id_elems[cval->id] = cval;
570 * get a terminal name string
573 static struct iterm_name_combo {
577 { 0x0300, "Output" },
578 { 0x0301, "Speaker" },
579 { 0x0302, "Headphone" },
580 { 0x0303, "HMD Audio" },
581 { 0x0304, "Desktop Speaker" },
582 { 0x0305, "Room Speaker" },
583 { 0x0306, "Com Speaker" },
585 { 0x0600, "External In" },
586 { 0x0601, "Analog In" },
587 { 0x0602, "Digital In" },
589 { 0x0604, "Legacy In" },
590 { 0x0605, "IEC958 In" },
591 { 0x0606, "1394 DA Stream" },
592 { 0x0607, "1394 DV Stream" },
593 { 0x0700, "Embedded" },
594 { 0x0701, "Noise Source" },
595 { 0x0702, "Equalization Noise" },
599 { 0x0706, "MiniDisk" },
600 { 0x0707, "Analog Tape" },
601 { 0x0708, "Phonograph" },
602 { 0x0709, "VCR Audio" },
603 { 0x070a, "Video Disk Audio" },
604 { 0x070b, "DVD Audio" },
605 { 0x070c, "TV Tuner Audio" },
606 { 0x070d, "Satellite Rec Audio" },
607 { 0x070e, "Cable Tuner Audio" },
608 { 0x070f, "DSS Audio" },
609 { 0x0710, "Radio Receiver" },
610 { 0x0711, "Radio Transmitter" },
611 { 0x0712, "Multi-Track Recorder" },
612 { 0x0713, "Synthesizer" },
616 static int get_term_name(struct mixer_build *state, struct usb_audio_term *iterm,
617 unsigned char *name, int maxlen, int term_only)
619 struct iterm_name_combo *names;
622 return snd_usb_copy_string_desc(state, iterm->name, name, maxlen);
624 /* virtual type - not a real terminal */
625 if (iterm->type >> 16) {
628 switch (iterm->type >> 16) {
629 case UAC_SELECTOR_UNIT:
630 strcpy(name, "Selector"); return 8;
631 case UAC1_PROCESSING_UNIT:
632 strcpy(name, "Process Unit"); return 12;
633 case UAC1_EXTENSION_UNIT:
634 strcpy(name, "Ext Unit"); return 8;
636 strcpy(name, "Mixer"); return 5;
638 return sprintf(name, "Unit %d", iterm->id);
642 switch (iterm->type & 0xff00) {
644 strcpy(name, "PCM"); return 3;
646 strcpy(name, "Mic"); return 3;
648 strcpy(name, "Headset"); return 7;
650 strcpy(name, "Phone"); return 5;
653 for (names = iterm_names; names->type; names++)
654 if (names->type == iterm->type) {
655 strcpy(name, names->name);
656 return strlen(names->name);
663 * parse the source unit recursively until it reaches to a terminal
664 * or a branched unit.
666 static int check_input_term(struct mixer_build *state, int id, struct usb_audio_term *term)
671 memset(term, 0, sizeof(*term));
672 while ((p1 = find_audio_control_unit(state, id)) != NULL) {
673 unsigned char *hdr = p1;
676 case UAC_INPUT_TERMINAL:
677 if (state->mixer->protocol == UAC_VERSION_1) {
678 struct uac_input_terminal_descriptor *d = p1;
679 term->type = le16_to_cpu(d->wTerminalType);
680 term->channels = d->bNrChannels;
681 term->chconfig = le16_to_cpu(d->wChannelConfig);
682 term->name = d->iTerminal;
683 } else { /* UAC_VERSION_2 */
684 struct uac2_input_terminal_descriptor *d = p1;
685 term->type = le16_to_cpu(d->wTerminalType);
686 term->channels = d->bNrChannels;
687 term->chconfig = le32_to_cpu(d->bmChannelConfig);
688 term->name = d->iTerminal;
690 /* call recursively to get the clock selectors */
691 err = check_input_term(state, d->bCSourceID, term);
696 case UAC_FEATURE_UNIT: {
697 /* the header is the same for v1 and v2 */
698 struct uac_feature_unit_descriptor *d = p1;
700 break; /* continue to parse */
702 case UAC_MIXER_UNIT: {
703 struct uac_mixer_unit_descriptor *d = p1;
704 term->type = d->bDescriptorSubtype << 16; /* virtual type */
705 term->channels = uac_mixer_unit_bNrChannels(d);
706 term->chconfig = uac_mixer_unit_wChannelConfig(d, state->mixer->protocol);
707 term->name = uac_mixer_unit_iMixer(d);
710 case UAC_SELECTOR_UNIT:
711 case UAC2_CLOCK_SELECTOR: {
712 struct uac_selector_unit_descriptor *d = p1;
713 /* call recursively to retrieve the channel info */
714 err = check_input_term(state, d->baSourceID[0], term);
717 term->type = d->bDescriptorSubtype << 16; /* virtual type */
719 term->name = uac_selector_unit_iSelector(d);
722 case UAC1_PROCESSING_UNIT:
723 case UAC1_EXTENSION_UNIT: {
724 struct uac_processing_unit_descriptor *d = p1;
726 id = d->baSourceID[0];
727 break; /* continue to parse */
729 term->type = d->bDescriptorSubtype << 16; /* virtual type */
730 term->channels = uac_processing_unit_bNrChannels(d);
731 term->chconfig = uac_processing_unit_wChannelConfig(d, state->mixer->protocol);
732 term->name = uac_processing_unit_iProcessing(d, state->mixer->protocol);
735 case UAC2_CLOCK_SOURCE: {
736 struct uac_clock_source_descriptor *d = p1;
737 term->type = d->bDescriptorSubtype << 16; /* virtual type */
739 term->name = d->iClockSource;
754 /* feature unit control information */
755 struct usb_feature_control_info {
757 unsigned int type; /* control type (mute, volume, etc.) */
760 static struct usb_feature_control_info audio_feature_info[] = {
761 { "Mute", USB_MIXER_INV_BOOLEAN },
762 { "Volume", USB_MIXER_S16 },
763 { "Tone Control - Bass", USB_MIXER_S8 },
764 { "Tone Control - Mid", USB_MIXER_S8 },
765 { "Tone Control - Treble", USB_MIXER_S8 },
766 { "Graphic Equalizer", USB_MIXER_S8 }, /* FIXME: not implemeted yet */
767 { "Auto Gain Control", USB_MIXER_BOOLEAN },
768 { "Delay Control", USB_MIXER_U16 },
769 { "Bass Boost", USB_MIXER_BOOLEAN },
770 { "Loudness", USB_MIXER_BOOLEAN },
772 { "Input Gain Control", USB_MIXER_U16 },
773 { "Input Gain Pad Control", USB_MIXER_BOOLEAN },
774 { "Phase Inverter Control", USB_MIXER_BOOLEAN },
778 /* private_free callback */
779 static void usb_mixer_elem_free(struct snd_kcontrol *kctl)
781 kfree(kctl->private_data);
782 kctl->private_data = NULL;
787 * interface to ALSA control for feature/mixer units
790 /* volume control quirks */
791 static void volume_control_quirks(struct usb_mixer_elem_info *cval,
792 struct snd_kcontrol *kctl)
794 switch (cval->mixer->chip->usb_id) {
795 case USB_ID(0x0471, 0x0101):
796 case USB_ID(0x0471, 0x0104):
797 case USB_ID(0x0471, 0x0105):
798 case USB_ID(0x0672, 0x1041):
799 /* quirk for UDA1321/N101.
800 * note that detection between firmware 2.1.1.7 (N101)
801 * and later 2.1.1.21 is not very clear from datasheets.
802 * I hope that the min value is -15360 for newer firmware --jk
804 if (!strcmp(kctl->id.name, "PCM Playback Volume") &&
805 cval->min == -15616) {
807 "set volume quirk for UDA1321/N101 chip\n");
812 case USB_ID(0x046d, 0x09a4):
813 if (!strcmp(kctl->id.name, "Mic Capture Volume")) {
815 "set volume quirk for QuickCam E3500\n");
822 case USB_ID(0x046d, 0x0808):
823 case USB_ID(0x046d, 0x0809):
824 case USB_ID(0x046d, 0x081d): /* HD Webcam c510 */
825 case USB_ID(0x046d, 0x0991):
826 /* Most audio usb devices lie about volume resolution.
827 * Most Logitech webcams have res = 384.
828 * Proboly there is some logitech magic behind this number --fishor
830 if (!strcmp(kctl->id.name, "Mic Capture Volume")) {
832 "set resolution quirk: cval->res = 384\n");
841 * retrieve the minimum and maximum values for the specified control
843 static int get_min_max_with_quirks(struct usb_mixer_elem_info *cval,
844 int default_min, struct snd_kcontrol *kctl)
847 cval->min = default_min;
848 cval->max = cval->min + 1;
850 cval->dBmin = cval->dBmax = 0;
852 if (cval->val_type == USB_MIXER_BOOLEAN ||
853 cval->val_type == USB_MIXER_INV_BOOLEAN) {
854 cval->initialized = 1;
859 for (i = 0; i < MAX_CHANNELS; i++)
860 if (cval->cmask & (1 << i)) {
865 if (get_ctl_value(cval, UAC_GET_MAX, (cval->control << 8) | minchn, &cval->max) < 0 ||
866 get_ctl_value(cval, UAC_GET_MIN, (cval->control << 8) | minchn, &cval->min) < 0) {
867 snd_printd(KERN_ERR "%d:%d: cannot get min/max values for control %d (id %d)\n",
868 cval->id, snd_usb_ctrl_intf(cval->mixer->chip), cval->control, cval->id);
871 if (get_ctl_value(cval, UAC_GET_RES, (cval->control << 8) | minchn, &cval->res) < 0) {
874 int last_valid_res = cval->res;
876 while (cval->res > 1) {
877 if (snd_usb_mixer_set_ctl_value(cval, UAC_SET_RES,
878 (cval->control << 8) | minchn, cval->res / 2) < 0)
882 if (get_ctl_value(cval, UAC_GET_RES, (cval->control << 8) | minchn, &cval->res) < 0)
883 cval->res = last_valid_res;
888 /* Additional checks for the proper resolution
890 * Some devices report smaller resolutions than actually
891 * reacting. They don't return errors but simply clip
892 * to the lower aligned value.
894 if (cval->min + cval->res < cval->max) {
895 int last_valid_res = cval->res;
896 int saved, test, check;
897 get_cur_mix_raw(cval, minchn, &saved);
900 if (test < cval->max)
904 if (test < cval->min || test > cval->max ||
905 set_cur_mix_value(cval, minchn, 0, test) ||
906 get_cur_mix_raw(cval, minchn, &check)) {
907 cval->res = last_valid_res;
914 set_cur_mix_value(cval, minchn, 0, saved);
917 cval->initialized = 1;
921 volume_control_quirks(cval, kctl);
923 /* USB descriptions contain the dB scale in 1/256 dB unit
924 * while ALSA TLV contains in 1/100 dB unit
926 cval->dBmin = (convert_signed_value(cval, cval->min) * 100) / 256;
927 cval->dBmax = (convert_signed_value(cval, cval->max) * 100) / 256;
928 if (cval->dBmin > cval->dBmax) {
929 /* something is wrong; assume it's either from/to 0dB */
932 else if (cval->dBmin > 0)
934 if (cval->dBmin > cval->dBmax) {
935 /* totally crap, return an error */
943 #define get_min_max(cval, def) get_min_max_with_quirks(cval, def, NULL)
945 /* get a feature/mixer unit info */
946 static int mixer_ctl_feature_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
948 struct usb_mixer_elem_info *cval = kcontrol->private_data;
950 if (cval->val_type == USB_MIXER_BOOLEAN ||
951 cval->val_type == USB_MIXER_INV_BOOLEAN)
952 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
954 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
955 uinfo->count = cval->channels;
956 if (cval->val_type == USB_MIXER_BOOLEAN ||
957 cval->val_type == USB_MIXER_INV_BOOLEAN) {
958 uinfo->value.integer.min = 0;
959 uinfo->value.integer.max = 1;
961 if (!cval->initialized) {
962 get_min_max_with_quirks(cval, 0, kcontrol);
963 if (cval->initialized && cval->dBmin >= cval->dBmax) {
964 kcontrol->vd[0].access &=
965 ~(SNDRV_CTL_ELEM_ACCESS_TLV_READ |
966 SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK);
967 snd_ctl_notify(cval->mixer->chip->card,
968 SNDRV_CTL_EVENT_MASK_INFO,
972 uinfo->value.integer.min = 0;
973 uinfo->value.integer.max =
974 (cval->max - cval->min + cval->res - 1) / cval->res;
979 /* get the current value from feature/mixer unit */
980 static int mixer_ctl_feature_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
982 struct usb_mixer_elem_info *cval = kcontrol->private_data;
983 int c, cnt, val, err;
985 ucontrol->value.integer.value[0] = cval->min;
988 for (c = 0; c < MAX_CHANNELS; c++) {
989 if (!(cval->cmask & (1 << c)))
991 err = get_cur_mix_value(cval, c + 1, cnt, &val);
993 return cval->mixer->ignore_ctl_error ? 0 : err;
994 val = get_relative_value(cval, val);
995 ucontrol->value.integer.value[cnt] = val;
1000 /* master channel */
1001 err = get_cur_mix_value(cval, 0, 0, &val);
1003 return cval->mixer->ignore_ctl_error ? 0 : err;
1004 val = get_relative_value(cval, val);
1005 ucontrol->value.integer.value[0] = val;
1010 /* put the current value to feature/mixer unit */
1011 static int mixer_ctl_feature_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
1013 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1014 int c, cnt, val, oval, err;
1019 for (c = 0; c < MAX_CHANNELS; c++) {
1020 if (!(cval->cmask & (1 << c)))
1022 err = get_cur_mix_value(cval, c + 1, cnt, &oval);
1024 return cval->mixer->ignore_ctl_error ? 0 : err;
1025 val = ucontrol->value.integer.value[cnt];
1026 val = get_abs_value(cval, val);
1028 set_cur_mix_value(cval, c + 1, cnt, val);
1034 /* master channel */
1035 err = get_cur_mix_value(cval, 0, 0, &oval);
1037 return cval->mixer->ignore_ctl_error ? 0 : err;
1038 val = ucontrol->value.integer.value[0];
1039 val = get_abs_value(cval, val);
1041 set_cur_mix_value(cval, 0, 0, val);
1048 static struct snd_kcontrol_new usb_feature_unit_ctl = {
1049 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1050 .name = "", /* will be filled later manually */
1051 .info = mixer_ctl_feature_info,
1052 .get = mixer_ctl_feature_get,
1053 .put = mixer_ctl_feature_put,
1056 /* the read-only variant */
1057 static struct snd_kcontrol_new usb_feature_unit_ctl_ro = {
1058 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1059 .name = "", /* will be filled later manually */
1060 .info = mixer_ctl_feature_info,
1061 .get = mixer_ctl_feature_get,
1065 /* This symbol is exported in order to allow the mixer quirks to
1066 * hook up to the standard feature unit control mechanism */
1067 struct snd_kcontrol_new *snd_usb_feature_unit_ctl = &usb_feature_unit_ctl;
1070 * build a feature control
1073 static size_t append_ctl_name(struct snd_kcontrol *kctl, const char *str)
1075 return strlcat(kctl->id.name, str, sizeof(kctl->id.name));
1078 static void build_feature_ctl(struct mixer_build *state, void *raw_desc,
1079 unsigned int ctl_mask, int control,
1080 struct usb_audio_term *iterm, int unitid,
1083 struct uac_feature_unit_descriptor *desc = raw_desc;
1084 unsigned int len = 0;
1085 int mapped_name = 0;
1086 int nameid = uac_feature_unit_iFeature(desc);
1087 struct snd_kcontrol *kctl;
1088 struct usb_mixer_elem_info *cval;
1089 const struct usbmix_name_map *map;
1092 control++; /* change from zero-based to 1-based value */
1094 if (control == UAC_FU_GRAPHIC_EQUALIZER) {
1095 /* FIXME: not supported yet */
1099 map = find_map(state, unitid, control);
1100 if (check_ignored_ctl(map))
1103 cval = kzalloc(sizeof(*cval), GFP_KERNEL);
1105 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
1108 cval->mixer = state->mixer;
1110 cval->control = control;
1111 cval->cmask = ctl_mask;
1112 cval->val_type = audio_feature_info[control-1].type;
1113 if (ctl_mask == 0) {
1114 cval->channels = 1; /* master channel */
1115 cval->master_readonly = readonly_mask;
1118 for (i = 0; i < 16; i++)
1119 if (ctl_mask & (1 << i))
1122 cval->ch_readonly = readonly_mask;
1125 /* if all channels in the mask are marked read-only, make the control
1126 * read-only. set_cur_mix_value() will check the mask again and won't
1127 * issue write commands to read-only channels. */
1128 if (cval->channels == readonly_mask)
1129 kctl = snd_ctl_new1(&usb_feature_unit_ctl_ro, cval);
1131 kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval);
1134 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
1138 kctl->private_free = usb_mixer_elem_free;
1140 len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name));
1141 mapped_name = len != 0;
1142 if (! len && nameid)
1143 len = snd_usb_copy_string_desc(state, nameid,
1144 kctl->id.name, sizeof(kctl->id.name));
1146 /* get min/max values */
1147 get_min_max_with_quirks(cval, 0, kctl);
1152 /* determine the control name. the rule is:
1153 * - if a name id is given in descriptor, use it.
1154 * - if the connected input can be determined, then use the name
1156 * - if the connected output can be determined, use it.
1157 * - otherwise, anonymous name.
1160 len = get_term_name(state, iterm, kctl->id.name, sizeof(kctl->id.name), 1);
1162 len = get_term_name(state, &state->oterm, kctl->id.name, sizeof(kctl->id.name), 1);
1164 len = snprintf(kctl->id.name, sizeof(kctl->id.name),
1165 "Feature %d", unitid);
1167 /* determine the stream direction:
1168 * if the connected output is USB stream, then it's likely a
1169 * capture stream. otherwise it should be playback (hopefully :)
1171 if (! mapped_name && ! (state->oterm.type >> 16)) {
1172 if ((state->oterm.type & 0xff00) == 0x0100) {
1173 len = append_ctl_name(kctl, " Capture");
1175 len = append_ctl_name(kctl, " Playback");
1178 append_ctl_name(kctl, control == UAC_FU_MUTE ?
1179 " Switch" : " Volume");
1180 if (control == UAC_FU_VOLUME) {
1181 check_mapped_dB(map, cval);
1182 if (cval->dBmin < cval->dBmax || !cval->initialized) {
1183 kctl->tlv.c = mixer_vol_tlv;
1184 kctl->vd[0].access |=
1185 SNDRV_CTL_ELEM_ACCESS_TLV_READ |
1186 SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK;
1193 strlcpy(kctl->id.name, audio_feature_info[control-1].name,
1194 sizeof(kctl->id.name));
1198 range = (cval->max - cval->min) / cval->res;
1199 /* Are there devices with volume range more than 255? I use a bit more
1200 * to be sure. 384 is a resolution magic number found on Logitech
1201 * devices. It will definitively catch all buggy Logitech devices.
1204 snd_printk(KERN_WARNING "usb_audio: Warning! Unlikely big "
1205 "volume range (=%u), cval->res is probably wrong.",
1207 snd_printk(KERN_WARNING "usb_audio: [%d] FU [%s] ch = %d, "
1208 "val = %d/%d/%d", cval->id,
1209 kctl->id.name, cval->channels,
1210 cval->min, cval->max, cval->res);
1213 snd_printdd(KERN_INFO "[%d] FU [%s] ch = %d, val = %d/%d/%d\n",
1214 cval->id, kctl->id.name, cval->channels, cval->min, cval->max, cval->res);
1215 snd_usb_mixer_add_control(state->mixer, kctl);
1221 * parse a feature unit
1223 * most of controls are defined here.
1225 static int parse_audio_feature_unit(struct mixer_build *state, int unitid, void *_ftr)
1228 struct usb_audio_term iterm;
1229 unsigned int master_bits, first_ch_bits;
1231 struct uac_feature_unit_descriptor *hdr = _ftr;
1234 if (state->mixer->protocol == UAC_VERSION_1) {
1235 csize = hdr->bControlSize;
1237 snd_printdd(KERN_ERR "usbaudio: unit %u: "
1238 "invalid bControlSize == 0\n", unitid);
1241 channels = (hdr->bLength - 7) / csize - 1;
1242 bmaControls = hdr->bmaControls;
1243 if (hdr->bLength < 7 + csize) {
1244 snd_printk(KERN_ERR "usbaudio: unit %u: "
1245 "invalid UAC_FEATURE_UNIT descriptor\n",
1250 struct uac2_feature_unit_descriptor *ftr = _ftr;
1252 channels = (hdr->bLength - 6) / 4 - 1;
1253 bmaControls = ftr->bmaControls;
1254 if (hdr->bLength < 6 + csize) {
1255 snd_printk(KERN_ERR "usbaudio: unit %u: "
1256 "invalid UAC_FEATURE_UNIT descriptor\n",
1262 /* parse the source unit */
1263 if ((err = parse_audio_unit(state, hdr->bSourceID)) < 0)
1266 /* determine the input source type and name */
1267 err = check_input_term(state, hdr->bSourceID, &iterm);
1271 master_bits = snd_usb_combine_bytes(bmaControls, csize);
1272 /* master configuration quirks */
1273 switch (state->chip->usb_id) {
1274 case USB_ID(0x08bb, 0x2702):
1275 snd_printk(KERN_INFO
1276 "usbmixer: master volume quirk for PCM2702 chip\n");
1277 /* disable non-functional volume control */
1278 master_bits &= ~UAC_CONTROL_BIT(UAC_FU_VOLUME);
1282 first_ch_bits = snd_usb_combine_bytes(bmaControls + csize, csize);
1286 if (state->mixer->protocol == UAC_VERSION_1) {
1287 /* check all control types */
1288 for (i = 0; i < 10; i++) {
1289 unsigned int ch_bits = 0;
1290 for (j = 0; j < channels; j++) {
1291 unsigned int mask = snd_usb_combine_bytes(bmaControls + csize * (j+1), csize);
1292 if (mask & (1 << i))
1293 ch_bits |= (1 << j);
1295 /* audio class v1 controls are never read-only */
1296 if (ch_bits & 1) /* the first channel must be set (for ease of programming) */
1297 build_feature_ctl(state, _ftr, ch_bits, i, &iterm, unitid, 0);
1298 if (master_bits & (1 << i))
1299 build_feature_ctl(state, _ftr, 0, i, &iterm, unitid, 0);
1301 } else { /* UAC_VERSION_2 */
1302 for (i = 0; i < ARRAY_SIZE(audio_feature_info); i++) {
1303 unsigned int ch_bits = 0;
1304 unsigned int ch_read_only = 0;
1306 for (j = 0; j < channels; j++) {
1307 unsigned int mask = snd_usb_combine_bytes(bmaControls + csize * (j+1), csize);
1308 if (uac2_control_is_readable(mask, i)) {
1309 ch_bits |= (1 << j);
1310 if (!uac2_control_is_writeable(mask, i))
1311 ch_read_only |= (1 << j);
1315 /* NOTE: build_feature_ctl() will mark the control read-only if all channels
1316 * are marked read-only in the descriptors. Otherwise, the control will be
1317 * reported as writeable, but the driver will not actually issue a write
1318 * command for read-only channels */
1319 if (ch_bits & 1) /* the first channel must be set (for ease of programming) */
1320 build_feature_ctl(state, _ftr, ch_bits, i, &iterm, unitid, ch_read_only);
1321 if (uac2_control_is_readable(master_bits, i))
1322 build_feature_ctl(state, _ftr, 0, i, &iterm, unitid,
1323 !uac2_control_is_writeable(master_bits, i));
1336 * build a mixer unit control
1338 * the callbacks are identical with feature unit.
1339 * input channel number (zero based) is given in control field instead.
1342 static void build_mixer_unit_ctl(struct mixer_build *state,
1343 struct uac_mixer_unit_descriptor *desc,
1344 int in_pin, int in_ch, int unitid,
1345 struct usb_audio_term *iterm)
1347 struct usb_mixer_elem_info *cval;
1348 unsigned int num_outs = uac_mixer_unit_bNrChannels(desc);
1349 unsigned int i, len;
1350 struct snd_kcontrol *kctl;
1351 const struct usbmix_name_map *map;
1353 map = find_map(state, unitid, 0);
1354 if (check_ignored_ctl(map))
1357 cval = kzalloc(sizeof(*cval), GFP_KERNEL);
1361 cval->mixer = state->mixer;
1363 cval->control = in_ch + 1; /* based on 1 */
1364 cval->val_type = USB_MIXER_S16;
1365 for (i = 0; i < num_outs; i++) {
1366 if (check_matrix_bitmap(uac_mixer_unit_bmControls(desc, state->mixer->protocol), in_ch, i, num_outs)) {
1367 cval->cmask |= (1 << i);
1372 /* get min/max values */
1373 get_min_max(cval, 0);
1375 kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval);
1377 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
1381 kctl->private_free = usb_mixer_elem_free;
1383 len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name));
1385 len = get_term_name(state, iterm, kctl->id.name, sizeof(kctl->id.name), 0);
1387 len = sprintf(kctl->id.name, "Mixer Source %d", in_ch + 1);
1388 append_ctl_name(kctl, " Volume");
1390 snd_printdd(KERN_INFO "[%d] MU [%s] ch = %d, val = %d/%d\n",
1391 cval->id, kctl->id.name, cval->channels, cval->min, cval->max);
1392 snd_usb_mixer_add_control(state->mixer, kctl);
1397 * parse a mixer unit
1399 static int parse_audio_mixer_unit(struct mixer_build *state, int unitid, void *raw_desc)
1401 struct uac_mixer_unit_descriptor *desc = raw_desc;
1402 struct usb_audio_term iterm;
1403 int input_pins, num_ins, num_outs;
1406 if (desc->bLength < 11 || ! (input_pins = desc->bNrInPins) || ! (num_outs = uac_mixer_unit_bNrChannels(desc))) {
1407 snd_printk(KERN_ERR "invalid MIXER UNIT descriptor %d\n", unitid);
1410 /* no bmControls field (e.g. Maya44) -> ignore */
1411 if (desc->bLength <= 10 + input_pins) {
1412 snd_printdd(KERN_INFO "MU %d has no bmControls field\n", unitid);
1418 for (pin = 0; pin < input_pins; pin++) {
1419 err = parse_audio_unit(state, desc->baSourceID[pin]);
1422 err = check_input_term(state, desc->baSourceID[pin], &iterm);
1425 num_ins += iterm.channels;
1426 for (; ich < num_ins; ++ich) {
1427 int och, ich_has_controls = 0;
1429 for (och = 0; och < num_outs; ++och) {
1430 if (check_matrix_bitmap(uac_mixer_unit_bmControls(desc, state->mixer->protocol),
1431 ich, och, num_outs)) {
1432 ich_has_controls = 1;
1436 if (ich_has_controls)
1437 build_mixer_unit_ctl(state, desc, pin, ich,
1446 * Processing Unit / Extension Unit
1449 /* get callback for processing/extension unit */
1450 static int mixer_ctl_procunit_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
1452 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1455 err = get_cur_ctl_value(cval, cval->control << 8, &val);
1456 if (err < 0 && cval->mixer->ignore_ctl_error) {
1457 ucontrol->value.integer.value[0] = cval->min;
1462 val = get_relative_value(cval, val);
1463 ucontrol->value.integer.value[0] = val;
1467 /* put callback for processing/extension unit */
1468 static int mixer_ctl_procunit_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
1470 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1473 err = get_cur_ctl_value(cval, cval->control << 8, &oval);
1475 if (cval->mixer->ignore_ctl_error)
1479 val = ucontrol->value.integer.value[0];
1480 val = get_abs_value(cval, val);
1482 set_cur_ctl_value(cval, cval->control << 8, val);
1488 /* alsa control interface for processing/extension unit */
1489 static struct snd_kcontrol_new mixer_procunit_ctl = {
1490 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1491 .name = "", /* will be filled later */
1492 .info = mixer_ctl_feature_info,
1493 .get = mixer_ctl_procunit_get,
1494 .put = mixer_ctl_procunit_put,
1499 * predefined data for processing units
1501 struct procunit_value_info {
1508 struct procunit_info {
1511 struct procunit_value_info *values;
1514 static struct procunit_value_info updown_proc_info[] = {
1515 { UAC_UD_ENABLE, "Switch", USB_MIXER_BOOLEAN },
1516 { UAC_UD_MODE_SELECT, "Mode Select", USB_MIXER_U8, 1 },
1519 static struct procunit_value_info prologic_proc_info[] = {
1520 { UAC_DP_ENABLE, "Switch", USB_MIXER_BOOLEAN },
1521 { UAC_DP_MODE_SELECT, "Mode Select", USB_MIXER_U8, 1 },
1524 static struct procunit_value_info threed_enh_proc_info[] = {
1525 { UAC_3D_ENABLE, "Switch", USB_MIXER_BOOLEAN },
1526 { UAC_3D_SPACE, "Spaciousness", USB_MIXER_U8 },
1529 static struct procunit_value_info reverb_proc_info[] = {
1530 { UAC_REVERB_ENABLE, "Switch", USB_MIXER_BOOLEAN },
1531 { UAC_REVERB_LEVEL, "Level", USB_MIXER_U8 },
1532 { UAC_REVERB_TIME, "Time", USB_MIXER_U16 },
1533 { UAC_REVERB_FEEDBACK, "Feedback", USB_MIXER_U8 },
1536 static struct procunit_value_info chorus_proc_info[] = {
1537 { UAC_CHORUS_ENABLE, "Switch", USB_MIXER_BOOLEAN },
1538 { UAC_CHORUS_LEVEL, "Level", USB_MIXER_U8 },
1539 { UAC_CHORUS_RATE, "Rate", USB_MIXER_U16 },
1540 { UAC_CHORUS_DEPTH, "Depth", USB_MIXER_U16 },
1543 static struct procunit_value_info dcr_proc_info[] = {
1544 { UAC_DCR_ENABLE, "Switch", USB_MIXER_BOOLEAN },
1545 { UAC_DCR_RATE, "Ratio", USB_MIXER_U16 },
1546 { UAC_DCR_MAXAMPL, "Max Amp", USB_MIXER_S16 },
1547 { UAC_DCR_THRESHOLD, "Threshold", USB_MIXER_S16 },
1548 { UAC_DCR_ATTACK_TIME, "Attack Time", USB_MIXER_U16 },
1549 { UAC_DCR_RELEASE_TIME, "Release Time", USB_MIXER_U16 },
1553 static struct procunit_info procunits[] = {
1554 { UAC_PROCESS_UP_DOWNMIX, "Up Down", updown_proc_info },
1555 { UAC_PROCESS_DOLBY_PROLOGIC, "Dolby Prologic", prologic_proc_info },
1556 { UAC_PROCESS_STEREO_EXTENDER, "3D Stereo Extender", threed_enh_proc_info },
1557 { UAC_PROCESS_REVERB, "Reverb", reverb_proc_info },
1558 { UAC_PROCESS_CHORUS, "Chorus", chorus_proc_info },
1559 { UAC_PROCESS_DYN_RANGE_COMP, "DCR", dcr_proc_info },
1563 * predefined data for extension units
1565 static struct procunit_value_info clock_rate_xu_info[] = {
1566 { USB_XU_CLOCK_RATE_SELECTOR, "Selector", USB_MIXER_U8, 0 },
1569 static struct procunit_value_info clock_source_xu_info[] = {
1570 { USB_XU_CLOCK_SOURCE_SELECTOR, "External", USB_MIXER_BOOLEAN },
1573 static struct procunit_value_info spdif_format_xu_info[] = {
1574 { USB_XU_DIGITAL_FORMAT_SELECTOR, "SPDIF/AC3", USB_MIXER_BOOLEAN },
1577 static struct procunit_value_info soft_limit_xu_info[] = {
1578 { USB_XU_SOFT_LIMIT_SELECTOR, " ", USB_MIXER_BOOLEAN },
1581 static struct procunit_info extunits[] = {
1582 { USB_XU_CLOCK_RATE, "Clock rate", clock_rate_xu_info },
1583 { USB_XU_CLOCK_SOURCE, "DigitalIn CLK source", clock_source_xu_info },
1584 { USB_XU_DIGITAL_IO_STATUS, "DigitalOut format:", spdif_format_xu_info },
1585 { USB_XU_DEVICE_OPTIONS, "AnalogueIn Soft Limit", soft_limit_xu_info },
1589 * build a processing/extension unit
1591 static int build_audio_procunit(struct mixer_build *state, int unitid, void *raw_desc, struct procunit_info *list, char *name)
1593 struct uac_processing_unit_descriptor *desc = raw_desc;
1594 int num_ins = desc->bNrInPins;
1595 struct usb_mixer_elem_info *cval;
1596 struct snd_kcontrol *kctl;
1597 int i, err, nameid, type, len;
1598 struct procunit_info *info;
1599 struct procunit_value_info *valinfo;
1600 const struct usbmix_name_map *map;
1601 static struct procunit_value_info default_value_info[] = {
1602 { 0x01, "Switch", USB_MIXER_BOOLEAN },
1605 static struct procunit_info default_info = {
1606 0, NULL, default_value_info
1609 if (desc->bLength < 13 || desc->bLength < 13 + num_ins ||
1610 desc->bLength < num_ins + uac_processing_unit_bControlSize(desc, state->mixer->protocol)) {
1611 snd_printk(KERN_ERR "invalid %s descriptor (id %d)\n", name, unitid);
1615 for (i = 0; i < num_ins; i++) {
1616 if ((err = parse_audio_unit(state, desc->baSourceID[i])) < 0)
1620 type = le16_to_cpu(desc->wProcessType);
1621 for (info = list; info && info->type; info++)
1622 if (info->type == type)
1624 if (! info || ! info->type)
1625 info = &default_info;
1627 for (valinfo = info->values; valinfo->control; valinfo++) {
1628 __u8 *controls = uac_processing_unit_bmControls(desc, state->mixer->protocol);
1630 if (! (controls[valinfo->control / 8] & (1 << ((valinfo->control % 8) - 1))))
1632 map = find_map(state, unitid, valinfo->control);
1633 if (check_ignored_ctl(map))
1635 cval = kzalloc(sizeof(*cval), GFP_KERNEL);
1637 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
1640 cval->mixer = state->mixer;
1642 cval->control = valinfo->control;
1643 cval->val_type = valinfo->val_type;
1646 /* get min/max values */
1647 if (type == UAC_PROCESS_UP_DOWNMIX && cval->control == UAC_UD_MODE_SELECT) {
1648 __u8 *control_spec = uac_processing_unit_specific(desc, state->mixer->protocol);
1649 /* FIXME: hard-coded */
1651 cval->max = control_spec[0];
1653 cval->initialized = 1;
1655 if (type == USB_XU_CLOCK_RATE) {
1656 /* E-Mu USB 0404/0202/TrackerPre/0204
1657 * samplerate control quirk
1662 cval->initialized = 1;
1664 get_min_max(cval, valinfo->min_value);
1667 kctl = snd_ctl_new1(&mixer_procunit_ctl, cval);
1669 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
1673 kctl->private_free = usb_mixer_elem_free;
1675 if (check_mapped_name(map, kctl->id.name,
1676 sizeof(kctl->id.name)))
1678 else if (info->name)
1679 strlcpy(kctl->id.name, info->name, sizeof(kctl->id.name));
1681 nameid = uac_processing_unit_iProcessing(desc, state->mixer->protocol);
1684 len = snd_usb_copy_string_desc(state, nameid, kctl->id.name, sizeof(kctl->id.name));
1686 strlcpy(kctl->id.name, name, sizeof(kctl->id.name));
1688 append_ctl_name(kctl, " ");
1689 append_ctl_name(kctl, valinfo->suffix);
1691 snd_printdd(KERN_INFO "[%d] PU [%s] ch = %d, val = %d/%d\n",
1692 cval->id, kctl->id.name, cval->channels, cval->min, cval->max);
1693 if ((err = snd_usb_mixer_add_control(state->mixer, kctl)) < 0)
1700 static int parse_audio_processing_unit(struct mixer_build *state, int unitid, void *raw_desc)
1702 return build_audio_procunit(state, unitid, raw_desc, procunits, "Processing Unit");
1705 static int parse_audio_extension_unit(struct mixer_build *state, int unitid, void *raw_desc)
1707 /* Note that we parse extension units with processing unit descriptors.
1708 * That's ok as the layout is the same */
1709 return build_audio_procunit(state, unitid, raw_desc, extunits, "Extension Unit");
1717 /* info callback for selector unit
1718 * use an enumerator type for routing
1720 static int mixer_ctl_selector_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
1722 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1723 const char **itemlist = (const char **)kcontrol->private_value;
1725 if (snd_BUG_ON(!itemlist))
1727 return snd_ctl_enum_info(uinfo, 1, cval->max, itemlist);
1730 /* get callback for selector unit */
1731 static int mixer_ctl_selector_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
1733 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1736 err = get_cur_ctl_value(cval, cval->control << 8, &val);
1738 if (cval->mixer->ignore_ctl_error) {
1739 ucontrol->value.enumerated.item[0] = 0;
1744 val = get_relative_value(cval, val);
1745 ucontrol->value.enumerated.item[0] = val;
1749 /* put callback for selector unit */
1750 static int mixer_ctl_selector_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
1752 struct usb_mixer_elem_info *cval = kcontrol->private_data;
1755 err = get_cur_ctl_value(cval, cval->control << 8, &oval);
1757 if (cval->mixer->ignore_ctl_error)
1761 val = ucontrol->value.enumerated.item[0];
1762 val = get_abs_value(cval, val);
1764 set_cur_ctl_value(cval, cval->control << 8, val);
1770 /* alsa control interface for selector unit */
1771 static struct snd_kcontrol_new mixer_selectunit_ctl = {
1772 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1773 .name = "", /* will be filled later */
1774 .info = mixer_ctl_selector_info,
1775 .get = mixer_ctl_selector_get,
1776 .put = mixer_ctl_selector_put,
1780 /* private free callback.
1781 * free both private_data and private_value
1783 static void usb_mixer_selector_elem_free(struct snd_kcontrol *kctl)
1787 if (kctl->private_data) {
1788 struct usb_mixer_elem_info *cval = kctl->private_data;
1789 num_ins = cval->max;
1791 kctl->private_data = NULL;
1793 if (kctl->private_value) {
1794 char **itemlist = (char **)kctl->private_value;
1795 for (i = 0; i < num_ins; i++)
1798 kctl->private_value = 0;
1803 * parse a selector unit
1805 static int parse_audio_selector_unit(struct mixer_build *state, int unitid, void *raw_desc)
1807 struct uac_selector_unit_descriptor *desc = raw_desc;
1808 unsigned int i, nameid, len;
1810 struct usb_mixer_elem_info *cval;
1811 struct snd_kcontrol *kctl;
1812 const struct usbmix_name_map *map;
1815 if (!desc->bNrInPins || desc->bLength < 5 + desc->bNrInPins) {
1816 snd_printk(KERN_ERR "invalid SELECTOR UNIT descriptor %d\n", unitid);
1820 for (i = 0; i < desc->bNrInPins; i++) {
1821 if ((err = parse_audio_unit(state, desc->baSourceID[i])) < 0)
1825 if (desc->bNrInPins == 1) /* only one ? nonsense! */
1828 map = find_map(state, unitid, 0);
1829 if (check_ignored_ctl(map))
1832 cval = kzalloc(sizeof(*cval), GFP_KERNEL);
1834 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
1837 cval->mixer = state->mixer;
1839 cval->val_type = USB_MIXER_U8;
1842 cval->max = desc->bNrInPins;
1844 cval->initialized = 1;
1846 if (desc->bDescriptorSubtype == UAC2_CLOCK_SELECTOR)
1847 cval->control = UAC2_CX_CLOCK_SELECTOR;
1851 namelist = kmalloc(sizeof(char *) * desc->bNrInPins, GFP_KERNEL);
1853 snd_printk(KERN_ERR "cannot malloc\n");
1857 #define MAX_ITEM_NAME_LEN 64
1858 for (i = 0; i < desc->bNrInPins; i++) {
1859 struct usb_audio_term iterm;
1861 namelist[i] = kmalloc(MAX_ITEM_NAME_LEN, GFP_KERNEL);
1862 if (! namelist[i]) {
1863 snd_printk(KERN_ERR "cannot malloc\n");
1870 len = check_mapped_selector_name(state, unitid, i, namelist[i],
1872 if (! len && check_input_term(state, desc->baSourceID[i], &iterm) >= 0)
1873 len = get_term_name(state, &iterm, namelist[i], MAX_ITEM_NAME_LEN, 0);
1875 sprintf(namelist[i], "Input %d", i);
1878 kctl = snd_ctl_new1(&mixer_selectunit_ctl, cval);
1880 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
1885 kctl->private_value = (unsigned long)namelist;
1886 kctl->private_free = usb_mixer_selector_elem_free;
1888 nameid = uac_selector_unit_iSelector(desc);
1889 len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name));
1893 snd_usb_copy_string_desc(state, nameid, kctl->id.name, sizeof(kctl->id.name));
1895 len = get_term_name(state, &state->oterm,
1896 kctl->id.name, sizeof(kctl->id.name), 0);
1898 strlcpy(kctl->id.name, "USB", sizeof(kctl->id.name));
1900 if (desc->bDescriptorSubtype == UAC2_CLOCK_SELECTOR)
1901 append_ctl_name(kctl, " Clock Source");
1902 else if ((state->oterm.type & 0xff00) == 0x0100)
1903 append_ctl_name(kctl, " Capture Source");
1905 append_ctl_name(kctl, " Playback Source");
1908 snd_printdd(KERN_INFO "[%d] SU [%s] items = %d\n",
1909 cval->id, kctl->id.name, desc->bNrInPins);
1910 if ((err = snd_usb_mixer_add_control(state->mixer, kctl)) < 0)
1918 * parse an audio unit recursively
1921 static int parse_audio_unit(struct mixer_build *state, int unitid)
1925 if (test_and_set_bit(unitid, state->unitbitmap))
1926 return 0; /* the unit already visited */
1928 p1 = find_audio_control_unit(state, unitid);
1930 snd_printk(KERN_ERR "usbaudio: unit %d not found!\n", unitid);
1935 case UAC_INPUT_TERMINAL:
1936 case UAC2_CLOCK_SOURCE:
1938 case UAC_MIXER_UNIT:
1939 return parse_audio_mixer_unit(state, unitid, p1);
1940 case UAC_SELECTOR_UNIT:
1941 case UAC2_CLOCK_SELECTOR:
1942 return parse_audio_selector_unit(state, unitid, p1);
1943 case UAC_FEATURE_UNIT:
1944 return parse_audio_feature_unit(state, unitid, p1);
1945 case UAC1_PROCESSING_UNIT:
1946 /* UAC2_EFFECT_UNIT has the same value */
1947 if (state->mixer->protocol == UAC_VERSION_1)
1948 return parse_audio_processing_unit(state, unitid, p1);
1950 return 0; /* FIXME - effect units not implemented yet */
1951 case UAC1_EXTENSION_UNIT:
1952 /* UAC2_PROCESSING_UNIT_V2 has the same value */
1953 if (state->mixer->protocol == UAC_VERSION_1)
1954 return parse_audio_extension_unit(state, unitid, p1);
1955 else /* UAC_VERSION_2 */
1956 return parse_audio_processing_unit(state, unitid, p1);
1958 snd_printk(KERN_ERR "usbaudio: unit %u: unexpected type 0x%02x\n", unitid, p1[2]);
1963 static void snd_usb_mixer_free(struct usb_mixer_interface *mixer)
1965 kfree(mixer->id_elems);
1967 kfree(mixer->urb->transfer_buffer);
1968 usb_free_urb(mixer->urb);
1970 usb_free_urb(mixer->rc_urb);
1971 kfree(mixer->rc_setup_packet);
1975 static int snd_usb_mixer_dev_free(struct snd_device *device)
1977 struct usb_mixer_interface *mixer = device->device_data;
1978 snd_usb_mixer_free(mixer);
1983 * create mixer controls
1985 * walk through all UAC_OUTPUT_TERMINAL descriptors to search for mixers
1987 static int snd_usb_mixer_controls(struct usb_mixer_interface *mixer)
1989 struct mixer_build state;
1991 const struct usbmix_ctl_map *map;
1994 memset(&state, 0, sizeof(state));
1995 state.chip = mixer->chip;
1996 state.mixer = mixer;
1997 state.buffer = mixer->hostif->extra;
1998 state.buflen = mixer->hostif->extralen;
2000 /* check the mapping table */
2001 for (map = usbmix_ctl_maps; map->id; map++) {
2002 if (map->id == state.chip->usb_id) {
2003 state.map = map->map;
2004 state.selector_map = map->selector_map;
2005 mixer->ignore_ctl_error = map->ignore_ctl_error;
2011 while ((p = snd_usb_find_csint_desc(mixer->hostif->extra, mixer->hostif->extralen,
2012 p, UAC_OUTPUT_TERMINAL)) != NULL) {
2013 if (mixer->protocol == UAC_VERSION_1) {
2014 struct uac1_output_terminal_descriptor *desc = p;
2016 if (desc->bLength < sizeof(*desc))
2017 continue; /* invalid descriptor? */
2018 set_bit(desc->bTerminalID, state.unitbitmap); /* mark terminal ID as visited */
2019 state.oterm.id = desc->bTerminalID;
2020 state.oterm.type = le16_to_cpu(desc->wTerminalType);
2021 state.oterm.name = desc->iTerminal;
2022 err = parse_audio_unit(&state, desc->bSourceID);
2023 if (err < 0 && err != -EINVAL)
2025 } else { /* UAC_VERSION_2 */
2026 struct uac2_output_terminal_descriptor *desc = p;
2028 if (desc->bLength < sizeof(*desc))
2029 continue; /* invalid descriptor? */
2030 set_bit(desc->bTerminalID, state.unitbitmap); /* mark terminal ID as visited */
2031 state.oterm.id = desc->bTerminalID;
2032 state.oterm.type = le16_to_cpu(desc->wTerminalType);
2033 state.oterm.name = desc->iTerminal;
2034 err = parse_audio_unit(&state, desc->bSourceID);
2035 if (err < 0 && err != -EINVAL)
2038 /* for UAC2, use the same approach to also add the clock selectors */
2039 err = parse_audio_unit(&state, desc->bCSourceID);
2040 if (err < 0 && err != -EINVAL)
2048 void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer, int unitid)
2050 struct usb_mixer_elem_info *info;
2052 for (info = mixer->id_elems[unitid]; info; info = info->next_id_elem)
2053 snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
2057 static void snd_usb_mixer_dump_cval(struct snd_info_buffer *buffer,
2059 struct usb_mixer_elem_info *cval)
2061 static char *val_types[] = {"BOOLEAN", "INV_BOOLEAN",
2062 "S8", "U8", "S16", "U16"};
2063 snd_iprintf(buffer, " Unit: %i\n", unitid);
2065 snd_iprintf(buffer, " Control: name=\"%s\", index=%i\n",
2066 cval->elem_id->name, cval->elem_id->index);
2067 snd_iprintf(buffer, " Info: id=%i, control=%i, cmask=0x%x, "
2068 "channels=%i, type=\"%s\"\n", cval->id,
2069 cval->control, cval->cmask, cval->channels,
2070 val_types[cval->val_type]);
2071 snd_iprintf(buffer, " Volume: min=%i, max=%i, dBmin=%i, dBmax=%i\n",
2072 cval->min, cval->max, cval->dBmin, cval->dBmax);
2075 static void snd_usb_mixer_proc_read(struct snd_info_entry *entry,
2076 struct snd_info_buffer *buffer)
2078 struct snd_usb_audio *chip = entry->private_data;
2079 struct usb_mixer_interface *mixer;
2080 struct usb_mixer_elem_info *cval;
2083 list_for_each_entry(mixer, &chip->mixer_list, list) {
2085 "USB Mixer: usb_id=0x%08x, ctrlif=%i, ctlerr=%i\n",
2086 chip->usb_id, snd_usb_ctrl_intf(chip),
2087 mixer->ignore_ctl_error);
2088 snd_iprintf(buffer, "Card: %s\n", chip->card->longname);
2089 for (unitid = 0; unitid < MAX_ID_ELEMS; unitid++) {
2090 for (cval = mixer->id_elems[unitid]; cval;
2091 cval = cval->next_id_elem)
2092 snd_usb_mixer_dump_cval(buffer, unitid, cval);
2097 static void snd_usb_mixer_interrupt_v2(struct usb_mixer_interface *mixer,
2098 int attribute, int value, int index)
2100 struct usb_mixer_elem_info *info;
2101 __u8 unitid = (index >> 8) & 0xff;
2102 __u8 control = (value >> 8) & 0xff;
2103 __u8 channel = value & 0xff;
2105 if (channel >= MAX_CHANNELS) {
2106 snd_printk(KERN_DEBUG "%s(): bogus channel number %d\n",
2111 for (info = mixer->id_elems[unitid]; info; info = info->next_id_elem) {
2112 if (info->control != control)
2115 switch (attribute) {
2117 /* invalidate cache, so the value is read from the device */
2119 info->cached &= ~(1 << channel);
2120 else /* master channel */
2123 snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
2136 snd_printk(KERN_DEBUG "unknown attribute %d in interrupt\n",
2143 static void snd_usb_mixer_interrupt(struct urb *urb)
2145 struct usb_mixer_interface *mixer = urb->context;
2146 int len = urb->actual_length;
2147 int ustatus = urb->status;
2152 if (mixer->protocol == UAC_VERSION_1) {
2153 struct uac1_status_word *status;
2155 for (status = urb->transfer_buffer;
2156 len >= sizeof(*status);
2157 len -= sizeof(*status), status++) {
2158 snd_printd(KERN_DEBUG "status interrupt: %02x %02x\n",
2159 status->bStatusType,
2160 status->bOriginator);
2162 /* ignore any notifications not from the control interface */
2163 if ((status->bStatusType & UAC1_STATUS_TYPE_ORIG_MASK) !=
2164 UAC1_STATUS_TYPE_ORIG_AUDIO_CONTROL_IF)
2167 if (status->bStatusType & UAC1_STATUS_TYPE_MEM_CHANGED)
2168 snd_usb_mixer_rc_memory_change(mixer, status->bOriginator);
2170 snd_usb_mixer_notify_id(mixer, status->bOriginator);
2172 } else { /* UAC_VERSION_2 */
2173 struct uac2_interrupt_data_msg *msg;
2175 for (msg = urb->transfer_buffer;
2176 len >= sizeof(*msg);
2177 len -= sizeof(*msg), msg++) {
2178 /* drop vendor specific and endpoint requests */
2179 if ((msg->bInfo & UAC2_INTERRUPT_DATA_MSG_VENDOR) ||
2180 (msg->bInfo & UAC2_INTERRUPT_DATA_MSG_EP))
2183 snd_usb_mixer_interrupt_v2(mixer, msg->bAttribute,
2184 le16_to_cpu(msg->wValue),
2185 le16_to_cpu(msg->wIndex));
2190 if (ustatus != -ENOENT && ustatus != -ECONNRESET && ustatus != -ESHUTDOWN) {
2191 urb->dev = mixer->chip->dev;
2192 usb_submit_urb(urb, GFP_ATOMIC);
2196 /* stop any bus activity of a mixer */
2197 void snd_usb_mixer_inactivate(struct usb_mixer_interface *mixer)
2199 usb_kill_urb(mixer->urb);
2200 usb_kill_urb(mixer->rc_urb);
2203 int snd_usb_mixer_activate(struct usb_mixer_interface *mixer)
2208 err = usb_submit_urb(mixer->urb, GFP_NOIO);
2216 /* create the handler for the optional status interrupt endpoint */
2217 static int snd_usb_mixer_status_create(struct usb_mixer_interface *mixer)
2219 struct usb_endpoint_descriptor *ep;
2220 void *transfer_buffer;
2224 /* we need one interrupt input endpoint */
2225 if (get_iface_desc(mixer->hostif)->bNumEndpoints < 1)
2227 ep = get_endpoint(mixer->hostif, 0);
2228 if (!usb_endpoint_dir_in(ep) || !usb_endpoint_xfer_int(ep))
2231 epnum = usb_endpoint_num(ep);
2232 buffer_length = le16_to_cpu(ep->wMaxPacketSize);
2233 transfer_buffer = kmalloc(buffer_length, GFP_KERNEL);
2234 if (!transfer_buffer)
2236 mixer->urb = usb_alloc_urb(0, GFP_KERNEL);
2238 kfree(transfer_buffer);
2241 usb_fill_int_urb(mixer->urb, mixer->chip->dev,
2242 usb_rcvintpipe(mixer->chip->dev, epnum),
2243 transfer_buffer, buffer_length,
2244 snd_usb_mixer_interrupt, mixer, ep->bInterval);
2245 usb_submit_urb(mixer->urb, GFP_KERNEL);
2249 int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif,
2252 static struct snd_device_ops dev_ops = {
2253 .dev_free = snd_usb_mixer_dev_free
2255 struct usb_mixer_interface *mixer;
2256 struct snd_info_entry *entry;
2259 strcpy(chip->card->mixername, "USB Mixer");
2261 mixer = kzalloc(sizeof(*mixer), GFP_KERNEL);
2265 mixer->ignore_ctl_error = ignore_error;
2266 mixer->id_elems = kcalloc(MAX_ID_ELEMS, sizeof(*mixer->id_elems),
2268 if (!mixer->id_elems) {
2273 mixer->hostif = &usb_ifnum_to_if(chip->dev, ctrlif)->altsetting[0];
2274 switch (get_iface_desc(mixer->hostif)->bInterfaceProtocol) {
2277 mixer->protocol = UAC_VERSION_1;
2280 mixer->protocol = UAC_VERSION_2;
2284 if ((err = snd_usb_mixer_controls(mixer)) < 0 ||
2285 (err = snd_usb_mixer_status_create(mixer)) < 0)
2288 snd_usb_mixer_apply_create_quirk(mixer);
2290 err = snd_device_new(chip->card, SNDRV_DEV_LOWLEVEL, mixer, &dev_ops);
2294 if (list_empty(&chip->mixer_list) &&
2295 !snd_card_proc_new(chip->card, "usbmixer", &entry))
2296 snd_info_set_text_ops(entry, chip, snd_usb_mixer_proc_read);
2298 list_add(&mixer->list, &chip->mixer_list);
2302 snd_usb_mixer_free(mixer);
2306 void snd_usb_mixer_disconnect(struct list_head *p)
2308 struct usb_mixer_interface *mixer;
2310 mixer = list_entry(p, struct usb_mixer_interface, list);
2311 usb_kill_urb(mixer->urb);
2312 usb_kill_urb(mixer->rc_urb);