SAFE public projects git trees. - safe/jmp/linux-2.6/blob - sound/usb/usbmixer.c

   1 /*
   2  *   (Tentative) USB Audio Driver for ALSA
   3  *
   4  *   Mixer control part
   5  *
   6  *   Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
   7  *
   8  *   Many codes borrowed from audio.c by
   9  *          Alan Cox (alan@lxorguk.ukuu.org.uk)
  10  *          Thomas Sailer (sailer@ife.ee.ethz.ch)
  11  *
  12  *
  13  *   This program is free software; you can redistribute it and/or modify
  14  *   it under the terms of the GNU General Public License as published by
  15  *   the Free Software Foundation; either version 2 of the License, or
  16  *   (at your option) any later version.
  17  *
  18  *   This program is distributed in the hope that it will be useful,
  19  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  *   GNU General Public License for more details.
  22  *
  23  *   You should have received a copy of the GNU General Public License
  24  *   along with this program; if not, write to the Free Software
  25  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  26  *
  27  */
  28
  29 #include <linux/bitops.h>
  30 #include <linux/init.h>
  31 #include <linux/list.h>
  32 #include <linux/slab.h>
  33 #include <linux/string.h>
  34 #include <linux/usb.h>
  35 #include <sound/core.h>
  36 #include <sound/control.h>
  37 #include <sound/hwdep.h>
  38 #include <sound/info.h>
  39 #include <sound/tlv.h>
  40
  41 #include "usbaudio.h"
  42
  43 /*
  44  */
  45
  46 /* ignore error from controls - for debugging */
  47 /* #define IGNORE_CTL_ERROR */
  48
  49 /*
  50  * Sound Blaster remote control configuration
  51  *
  52  * format of remote control data:
  53  * Extigy:       xx 00
  54  * Audigy 2 NX:  06 80 xx 00 00 00
  55  * Live! 24-bit: 06 80 xx yy 22 83
  56  */
  57 static const struct rc_config {
  58         u32 usb_id;
  59         u8  offset;
  60         u8  length;
  61         u8  packet_length;
  62         u8  min_packet_length; /* minimum accepted length of the URB result */
  63         u8  mute_mixer_id;
  64         u32 mute_code;
  65 } rc_configs[] = {
  66         { USB_ID(0x041e, 0x3000), 0, 1, 2, 1,  18, 0x0013 }, /* Extigy       */
  67         { USB_ID(0x041e, 0x3020), 2, 1, 6, 6,  18, 0x0013 }, /* Audigy 2 NX  */
  68         { USB_ID(0x041e, 0x3040), 2, 2, 6, 6,  2,  0x6e91 }, /* Live! 24-bit */
  69         { USB_ID(0x041e, 0x3048), 2, 2, 6, 6,  2,  0x6e91 }, /* Toshiba SB0500 */
  70 };
  71
  72 #define MAX_ID_ELEMS    256
  73
  74 struct usb_mixer_interface {
  75         struct snd_usb_audio *chip;
  76         unsigned int ctrlif;
  77         struct list_head list;
  78         unsigned int ignore_ctl_error;
  79         struct urb *urb;
  80         /* array[MAX_ID_ELEMS], indexed by unit id */
  81         struct usb_mixer_elem_info **id_elems;
  82
  83         /* Sound Blaster remote control stuff */
  84         const struct rc_config *rc_cfg;
  85         u32 rc_code;
  86         wait_queue_head_t rc_waitq;
  87         struct urb *rc_urb;
  88         struct usb_ctrlrequest *rc_setup_packet;
  89         u8 rc_buffer[6];
  90
  91         u8 audigy2nx_leds[3];
  92         u8 xonar_u1_status;
  93 };
  94
  95
  96 struct usb_audio_term {
  97         int id;
  98         int type;
  99         int channels;
 100         unsigned int chconfig;
 101         int name;
 102 };
 103
 104 struct usbmix_name_map;
 105
 106 struct mixer_build {
 107         struct snd_usb_audio *chip;
 108         struct usb_mixer_interface *mixer;
 109         unsigned char *buffer;
 110         unsigned int buflen;
 111         DECLARE_BITMAP(unitbitmap, MAX_ID_ELEMS);
 112         struct usb_audio_term oterm;
 113         const struct usbmix_name_map *map;
 114         const struct usbmix_selector_map *selector_map;
 115 };
 116
 117 #define MAX_CHANNELS    10      /* max logical channels */
 118
 119 struct usb_mixer_elem_info {
 120         struct usb_mixer_interface *mixer;
 121         struct usb_mixer_elem_info *next_id_elem; /* list of controls with same id */
 122         struct snd_ctl_elem_id *elem_id;
 123         unsigned int id;
 124         unsigned int control;   /* CS or ICN (high byte) */
 125         unsigned int cmask; /* channel mask bitmap: 0 = master */
 126         int channels;
 127         int val_type;
 128         int min, max, res;
 129         int dBmin, dBmax;
 130         int cached;
 131         int cache_val[MAX_CHANNELS];
 132         u8 initialized;
 133 };
 134
 135
 136 enum {
 137         USB_FEATURE_NONE = 0,
 138         USB_FEATURE_MUTE = 1,
 139         USB_FEATURE_VOLUME,
 140         USB_FEATURE_BASS,
 141         USB_FEATURE_MID,
 142         USB_FEATURE_TREBLE,
 143         USB_FEATURE_GEQ,
 144         USB_FEATURE_AGC,
 145         USB_FEATURE_DELAY,
 146         USB_FEATURE_BASSBOOST,
 147         USB_FEATURE_LOUDNESS
 148 };
 149
 150 enum {
 151         USB_MIXER_BOOLEAN,
 152         USB_MIXER_INV_BOOLEAN,
 153         USB_MIXER_S8,
 154         USB_MIXER_U8,
 155         USB_MIXER_S16,
 156         USB_MIXER_U16,
 157 };
 158
 159 enum {
 160         USB_PROC_UPDOWN = 1,
 161         USB_PROC_UPDOWN_SWITCH = 1,
 162         USB_PROC_UPDOWN_MODE_SEL = 2,
 163
 164         USB_PROC_PROLOGIC = 2,
 165         USB_PROC_PROLOGIC_SWITCH = 1,
 166         USB_PROC_PROLOGIC_MODE_SEL = 2,
 167
 168         USB_PROC_3DENH = 3,
 169         USB_PROC_3DENH_SWITCH = 1,
 170         USB_PROC_3DENH_SPACE = 2,
 171
 172         USB_PROC_REVERB = 4,
 173         USB_PROC_REVERB_SWITCH = 1,
 174         USB_PROC_REVERB_LEVEL = 2,
 175         USB_PROC_REVERB_TIME = 3,
 176         USB_PROC_REVERB_DELAY = 4,
 177
 178         USB_PROC_CHORUS = 5,
 179         USB_PROC_CHORUS_SWITCH = 1,
 180         USB_PROC_CHORUS_LEVEL = 2,
 181         USB_PROC_CHORUS_RATE = 3,
 182         USB_PROC_CHORUS_DEPTH = 4,
 183
 184         USB_PROC_DCR = 6,
 185         USB_PROC_DCR_SWITCH = 1,
 186         USB_PROC_DCR_RATIO = 2,
 187         USB_PROC_DCR_MAX_AMP = 3,
 188         USB_PROC_DCR_THRESHOLD = 4,
 189         USB_PROC_DCR_ATTACK = 5,
 190         USB_PROC_DCR_RELEASE = 6,
 191 };
 192
 193 /*E-mu 0202(0404) eXtension Unit(XU) control*/
 194 enum {
 195         USB_XU_CLOCK_RATE               = 0xe301,
 196         USB_XU_CLOCK_SOURCE             = 0xe302,
 197         USB_XU_DIGITAL_IO_STATUS        = 0xe303,
 198         USB_XU_DEVICE_OPTIONS           = 0xe304,
 199         USB_XU_DIRECT_MONITORING        = 0xe305,
 200         USB_XU_METERING                 = 0xe306
 201 };
 202 enum {
 203         USB_XU_CLOCK_SOURCE_SELECTOR = 0x02,    /* clock source*/
 204         USB_XU_CLOCK_RATE_SELECTOR = 0x03,      /* clock rate */
 205         USB_XU_DIGITAL_FORMAT_SELECTOR = 0x01,  /* the spdif format */
 206         USB_XU_SOFT_LIMIT_SELECTOR = 0x03       /* soft limiter */
 207 };
 208
 209 /*
 210  * manual mapping of mixer names
 211  * if the mixer topology is too complicated and the parsed names are
 212  * ambiguous, add the entries in usbmixer_maps.c.
 213  */
 214 #include "usbmixer_maps.c"
 215
 216 static const struct usbmix_name_map *
 217 find_map(struct mixer_build *state, int unitid, int control)
 218 {
 219         const struct usbmix_name_map *p = state->map;
 220
 221         if (!p)
 222                 return NULL;
 223
 224         for (p = state->map; p->id; p++) {
 225                 if (p->id == unitid &&
 226                     (!control || !p->control || control == p->control))
 227                         return p;
 228         }
 229         return NULL;
 230 }
 231
 232 /* get the mapped name if the unit matches */
 233 static int
 234 check_mapped_name(const struct usbmix_name_map *p, char *buf, int buflen)
 235 {
 236         if (!p || !p->name)
 237                 return 0;
 238
 239         buflen--;
 240         return strlcpy(buf, p->name, buflen);
 241 }
 242
 243 /* check whether the control should be ignored */
 244 static inline int
 245 check_ignored_ctl(const struct usbmix_name_map *p)
 246 {
 247         if (!p || p->name || p->dB)
 248                 return 0;
 249         return 1;
 250 }
 251
 252 /* dB mapping */
 253 static inline void check_mapped_dB(const struct usbmix_name_map *p,
 254                                    struct usb_mixer_elem_info *cval)
 255 {
 256         if (p && p->dB) {
 257                 cval->dBmin = p->dB->min;
 258                 cval->dBmax = p->dB->max;
 259         }
 260 }
 261
 262 /* get the mapped selector source name */
 263 static int check_mapped_selector_name(struct mixer_build *state, int unitid,
 264                                       int index, char *buf, int buflen)
 265 {
 266         const struct usbmix_selector_map *p;
 267
 268         if (! state->selector_map)
 269                 return 0;
 270         for (p = state->selector_map; p->id; p++) {
 271                 if (p->id == unitid && index < p->count)
 272                         return strlcpy(buf, p->names[index], buflen);
 273         }
 274         return 0;
 275 }
 276
 277 /*
 278  * find an audio control unit with the given unit id
 279  */
 280 static void *find_audio_control_unit(struct mixer_build *state, unsigned char unit)
 281 {
 282         unsigned char *p;
 283
 284         p = NULL;
 285         while ((p = snd_usb_find_desc(state->buffer, state->buflen, p,
 286                                       USB_DT_CS_INTERFACE)) != NULL) {
 287                 if (p[0] >= 4 && p[2] >= INPUT_TERMINAL && p[2] <= EXTENSION_UNIT && p[3] == unit)
 288                         return p;
 289         }
 290         return NULL;
 291 }
 292
 293
 294 /*
 295  * copy a string with the given id
 296  */
 297 static int snd_usb_copy_string_desc(struct mixer_build *state, int index, char *buf, int maxlen)
 298 {
 299         int len = usb_string(state->chip->dev, index, buf, maxlen - 1);
 300         buf[len] = 0;
 301         return len;
 302 }
 303
 304 /*
 305  * convert from the byte/word on usb descriptor to the zero-based integer
 306  */
 307 static int convert_signed_value(struct usb_mixer_elem_info *cval, int val)
 308 {
 309         switch (cval->val_type) {
 310         case USB_MIXER_BOOLEAN:
 311                 return !!val;
 312         case USB_MIXER_INV_BOOLEAN:
 313                 return !val;
 314         case USB_MIXER_U8:
 315                 val &= 0xff;
 316                 break;
 317         case USB_MIXER_S8:
 318                 val &= 0xff;
 319                 if (val >= 0x80)
 320                         val -= 0x100;
 321                 break;
 322         case USB_MIXER_U16:
 323                 val &= 0xffff;
 324                 break;
 325         case USB_MIXER_S16:
 326                 val &= 0xffff;
 327                 if (val >= 0x8000)
 328                         val -= 0x10000;
 329                 break;
 330         }
 331         return val;
 332 }
 333
 334 /*
 335  * convert from the zero-based int to the byte/word for usb descriptor
 336  */
 337 static int convert_bytes_value(struct usb_mixer_elem_info *cval, int val)
 338 {
 339         switch (cval->val_type) {
 340         case USB_MIXER_BOOLEAN:
 341                 return !!val;
 342         case USB_MIXER_INV_BOOLEAN:
 343                 return !val;
 344         case USB_MIXER_S8:
 345         case USB_MIXER_U8:
 346                 return val & 0xff;
 347         case USB_MIXER_S16:
 348         case USB_MIXER_U16:
 349                 return val & 0xffff;
 350         }
 351         return 0; /* not reached */
 352 }
 353
 354 static int get_relative_value(struct usb_mixer_elem_info *cval, int val)
 355 {
 356         if (! cval->res)
 357                 cval->res = 1;
 358         if (val < cval->min)
 359                 return 0;
 360         else if (val >= cval->max)
 361                 return (cval->max - cval->min + cval->res - 1) / cval->res;
 362         else
 363                 return (val - cval->min) / cval->res;
 364 }
 365
 366 static int get_abs_value(struct usb_mixer_elem_info *cval, int val)
 367 {
 368         if (val < 0)
 369                 return cval->min;
 370         if (! cval->res)
 371                 cval->res = 1;
 372         val *= cval->res;
 373         val += cval->min;
 374         if (val > cval->max)
 375                 return cval->max;
 376         return val;
 377 }
 378
 379
 380 /*
 381  * retrieve a mixer value
 382  */
 383
 384 static int get_ctl_value(struct usb_mixer_elem_info *cval, int request, int validx, int *value_ret)
 385 {
 386         unsigned char buf[2];
 387         int val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1;
 388         int timeout = 10;
 389
 390         while (timeout-- > 0) {
 391                 if (snd_usb_ctl_msg(cval->mixer->chip->dev,
 392                                     usb_rcvctrlpipe(cval->mixer->chip->dev, 0),
 393                                     request,
 394                                     USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
 395                                     validx, cval->mixer->ctrlif | (cval->id << 8),
 396                                     buf, val_len, 100) >= val_len) {
 397                         *value_ret = convert_signed_value(cval, snd_usb_combine_bytes(buf, val_len));
 398                         return 0;
 399                 }
 400         }
 401         snd_printdd(KERN_ERR "cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n",
 402                     request, validx, cval->mixer->ctrlif | (cval->id << 8), cval->val_type);
 403         return -EINVAL;
 404 }
 405
 406 static int get_cur_ctl_value(struct usb_mixer_elem_info *cval, int validx, int *value)
 407 {
 408         return get_ctl_value(cval, GET_CUR, validx, value);
 409 }
 410
 411 /* channel = 0: master, 1 = first channel */
 412 static inline int get_cur_mix_raw(struct usb_mixer_elem_info *cval,
 413                                   int channel, int *value)
 414 {
 415         return get_ctl_value(cval, GET_CUR, (cval->control << 8) | channel, value);
 416 }
 417
 418 static int get_cur_mix_value(struct usb_mixer_elem_info *cval,
 419                              int channel, int index, int *value)
 420 {
 421         int err;
 422
 423         if (cval->cached & (1 << channel)) {
 424                 *value = cval->cache_val[index];
 425                 return 0;
 426         }
 427         err = get_cur_mix_raw(cval, channel, value);
 428         if (err < 0) {
 429                 if (!cval->mixer->ignore_ctl_error)
 430                         snd_printd(KERN_ERR "cannot get current value for "
 431                                    "control %d ch %d: err = %d\n",
 432                                    cval->control, channel, err);
 433                 return err;
 434         }
 435         cval->cached |= 1 << channel;
 436         cval->cache_val[index] = *value;
 437         return 0;
 438 }
 439
 440
 441 /*
 442  * set a mixer value
 443  */
 444
 445 static int set_ctl_value(struct usb_mixer_elem_info *cval, int request, int validx, int value_set)
 446 {
 447         unsigned char buf[2];
 448         int val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1;
 449         int timeout = 10;
 450
 451         value_set = convert_bytes_value(cval, value_set);
 452         buf[0] = value_set & 0xff;
 453         buf[1] = (value_set >> 8) & 0xff;
 454         while (timeout-- > 0)
 455                 if (snd_usb_ctl_msg(cval->mixer->chip->dev,
 456                                     usb_sndctrlpipe(cval->mixer->chip->dev, 0),
 457                                     request,
 458                                     USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
 459                                     validx, cval->mixer->ctrlif | (cval->id << 8),
 460                                     buf, val_len, 100) >= 0)
 461                         return 0;
 462         snd_printdd(KERN_ERR "cannot set ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d, data = %#x/%#x\n",
 463                     request, validx, cval->mixer->ctrlif | (cval->id << 8), cval->val_type, buf[0], buf[1]);
 464         return -EINVAL;
 465 }
 466
 467 static int set_cur_ctl_value(struct usb_mixer_elem_info *cval, int validx, int value)
 468 {
 469         return set_ctl_value(cval, SET_CUR, validx, value);
 470 }
 471
 472 static int set_cur_mix_value(struct usb_mixer_elem_info *cval, int channel,
 473                              int index, int value)
 474 {
 475         int err;
 476         err = set_ctl_value(cval, SET_CUR, (cval->control << 8) | channel,
 477                             value);
 478         if (err < 0)
 479                 return err;
 480         cval->cached |= 1 << channel;
 481         cval->cache_val[index] = value;
 482         return 0;
 483 }
 484
 485 /*
 486  * TLV callback for mixer volume controls
 487  */
 488 static int mixer_vol_tlv(struct snd_kcontrol *kcontrol, int op_flag,
 489                          unsigned int size, unsigned int __user *_tlv)
 490 {
 491         struct usb_mixer_elem_info *cval = kcontrol->private_data;
 492         DECLARE_TLV_DB_MINMAX(scale, 0, 0);
 493
 494         if (size < sizeof(scale))
 495                 return -ENOMEM;
 496         scale[2] = cval->dBmin;
 497         scale[3] = cval->dBmax;
 498         if (copy_to_user(_tlv, scale, sizeof(scale)))
 499                 return -EFAULT;
 500         return 0;
 501 }
 502
 503 /*
 504  * parser routines begin here...
 505  */
 506
 507 static int parse_audio_unit(struct mixer_build *state, int unitid);
 508
 509
 510 /*
 511  * check if the input/output channel routing is enabled on the given bitmap.
 512  * used for mixer unit parser
 513  */
 514 static int check_matrix_bitmap(unsigned char *bmap, int ich, int och, int num_outs)
 515 {
 516         int idx = ich * num_outs + och;
 517         return bmap[idx >> 3] & (0x80 >> (idx & 7));
 518 }
 519
 520
 521 /*
 522  * add an alsa control element
 523  * search and increment the index until an empty slot is found.
 524  *
 525  * if failed, give up and free the control instance.
 526  */
 527
 528 static int add_control_to_empty(struct mixer_build *state, struct snd_kcontrol *kctl)
 529 {
 530         struct usb_mixer_elem_info *cval = kctl->private_data;
 531         int err;
 532
 533         while (snd_ctl_find_id(state->chip->card, &kctl->id))
 534                 kctl->id.index++;
 535         if ((err = snd_ctl_add(state->chip->card, kctl)) < 0) {
 536                 snd_printd(KERN_ERR "cannot add control (err = %d)\n", err);
 537                 return err;
 538         }
 539         cval->elem_id = &kctl->id;
 540         cval->next_id_elem = state->mixer->id_elems[cval->id];
 541         state->mixer->id_elems[cval->id] = cval;
 542         return 0;
 543 }
 544
 545
 546 /*
 547  * get a terminal name string
 548  */
 549
 550 static struct iterm_name_combo {
 551         int type;
 552         char *name;
 553 } iterm_names[] = {
 554         { 0x0300, "Output" },
 555         { 0x0301, "Speaker" },
 556         { 0x0302, "Headphone" },
 557         { 0x0303, "HMD Audio" },
 558         { 0x0304, "Desktop Speaker" },
 559         { 0x0305, "Room Speaker" },
 560         { 0x0306, "Com Speaker" },
 561         { 0x0307, "LFE" },
 562         { 0x0600, "External In" },
 563         { 0x0601, "Analog In" },
 564         { 0x0602, "Digital In" },
 565         { 0x0603, "Line" },
 566         { 0x0604, "Legacy In" },
 567         { 0x0605, "IEC958 In" },
 568         { 0x0606, "1394 DA Stream" },
 569         { 0x0607, "1394 DV Stream" },
 570         { 0x0700, "Embedded" },
 571         { 0x0701, "Noise Source" },
 572         { 0x0702, "Equalization Noise" },
 573         { 0x0703, "CD" },
 574         { 0x0704, "DAT" },
 575         { 0x0705, "DCC" },
 576         { 0x0706, "MiniDisk" },
 577         { 0x0707, "Analog Tape" },
 578         { 0x0708, "Phonograph" },
 579         { 0x0709, "VCR Audio" },
 580         { 0x070a, "Video Disk Audio" },
 581         { 0x070b, "DVD Audio" },
 582         { 0x070c, "TV Tuner Audio" },
 583         { 0x070d, "Satellite Rec Audio" },
 584         { 0x070e, "Cable Tuner Audio" },
 585         { 0x070f, "DSS Audio" },
 586         { 0x0710, "Radio Receiver" },
 587         { 0x0711, "Radio Transmitter" },
 588         { 0x0712, "Multi-Track Recorder" },
 589         { 0x0713, "Synthesizer" },
 590         { 0 },
 591 };
 592
 593 static int get_term_name(struct mixer_build *state, struct usb_audio_term *iterm,
 594                          unsigned char *name, int maxlen, int term_only)
 595 {
 596         struct iterm_name_combo *names;
 597
 598         if (iterm->name)
 599                 return snd_usb_copy_string_desc(state, iterm->name, name, maxlen);
 600
 601         /* virtual type - not a real terminal */
 602         if (iterm->type >> 16) {
 603                 if (term_only)
 604                         return 0;
 605                 switch (iterm->type >> 16) {
 606                 case SELECTOR_UNIT:
 607                         strcpy(name, "Selector"); return 8;
 608                 case PROCESSING_UNIT:
 609                         strcpy(name, "Process Unit"); return 12;
 610                 case EXTENSION_UNIT:
 611                         strcpy(name, "Ext Unit"); return 8;
 612                 case MIXER_UNIT:
 613                         strcpy(name, "Mixer"); return 5;
 614                 default:
 615                         return sprintf(name, "Unit %d", iterm->id);
 616                 }
 617         }
 618
 619         switch (iterm->type & 0xff00) {
 620         case 0x0100:
 621                 strcpy(name, "PCM"); return 3;
 622         case 0x0200:
 623                 strcpy(name, "Mic"); return 3;
 624         case 0x0400:
 625                 strcpy(name, "Headset"); return 7;
 626         case 0x0500:
 627                 strcpy(name, "Phone"); return 5;
 628         }
 629
 630         for (names = iterm_names; names->type; names++)
 631                 if (names->type == iterm->type) {
 632                         strcpy(name, names->name);
 633                         return strlen(names->name);
 634                 }
 635         return 0;
 636 }
 637
 638
 639 /*
 640  * parse the source unit recursively until it reaches to a terminal
 641  * or a branched unit.
 642  */
 643 static int check_input_term(struct mixer_build *state, int id, struct usb_audio_term *term)
 644 {
 645         unsigned char *p1;
 646
 647         memset(term, 0, sizeof(*term));
 648         while ((p1 = find_audio_control_unit(state, id)) != NULL) {
 649                 term->id = id;
 650                 switch (p1[2]) {
 651                 case INPUT_TERMINAL:
 652                         term->type = combine_word(p1 + 4);
 653                         term->channels = p1[7];
 654                         term->chconfig = combine_word(p1 + 8);
 655                         term->name = p1[11];
 656                         return 0;
 657                 case FEATURE_UNIT:
 658                         id = p1[4];
 659                         break; /* continue to parse */
 660                 case MIXER_UNIT:
 661                         term->type = p1[2] << 16; /* virtual type */
 662                         term->channels = p1[5 + p1[4]];
 663                         term->chconfig = combine_word(p1 + 6 + p1[4]);
 664                         term->name = p1[p1[0] - 1];
 665                         return 0;
 666                 case SELECTOR_UNIT:
 667                         /* call recursively to retrieve the channel info */
 668                         if (check_input_term(state, p1[5], term) < 0)
 669                                 return -ENODEV;
 670                         term->type = p1[2] << 16; /* virtual type */
 671                         term->id = id;
 672                         term->name = p1[9 + p1[0] - 1];
 673                         return 0;
 674                 case PROCESSING_UNIT:
 675                 case EXTENSION_UNIT:
 676                         if (p1[6] == 1) {
 677                                 id = p1[7];
 678                                 break; /* continue to parse */
 679                         }
 680                         term->type = p1[2] << 16; /* virtual type */
 681                         term->channels = p1[7 + p1[6]];
 682                         term->chconfig = combine_word(p1 + 8 + p1[6]);
 683                         term->name = p1[12 + p1[6] + p1[11 + p1[6]]];
 684                         return 0;
 685                 default:
 686                         return -ENODEV;
 687                 }
 688         }
 689         return -ENODEV;
 690 }
 691
 692
 693 /*
 694  * Feature Unit
 695  */
 696
 697 /* feature unit control information */
 698 struct usb_feature_control_info {
 699         const char *name;
 700         unsigned int type;      /* control type (mute, volume, etc.) */
 701 };
 702
 703 static struct usb_feature_control_info audio_feature_info[] = {
 704         { "Mute",               USB_MIXER_INV_BOOLEAN },
 705         { "Volume",             USB_MIXER_S16 },
 706         { "Tone Control - Bass",        USB_MIXER_S8 },
 707         { "Tone Control - Mid",         USB_MIXER_S8 },
 708         { "Tone Control - Treble",      USB_MIXER_S8 },
 709         { "Graphic Equalizer",          USB_MIXER_S8 }, /* FIXME: not implemeted yet */
 710         { "Auto Gain Control",  USB_MIXER_BOOLEAN },
 711         { "Delay Control",      USB_MIXER_U16 },
 712         { "Bass Boost",         USB_MIXER_BOOLEAN },
 713         { "Loudness",           USB_MIXER_BOOLEAN },
 714 };
 715
 716
 717 /* private_free callback */
 718 static void usb_mixer_elem_free(struct snd_kcontrol *kctl)
 719 {
 720         kfree(kctl->private_data);
 721         kctl->private_data = NULL;
 722 }
 723
 724
 725 /*
 726  * interface to ALSA control for feature/mixer units
 727  */
 728
 729 /*
 730  * retrieve the minimum and maximum values for the specified control
 731  */
 732 static int get_min_max(struct usb_mixer_elem_info *cval, int default_min)
 733 {
 734         /* for failsafe */
 735         cval->min = default_min;
 736         cval->max = cval->min + 1;
 737         cval->res = 1;
 738         cval->dBmin = cval->dBmax = 0;
 739
 740         if (cval->val_type == USB_MIXER_BOOLEAN ||
 741             cval->val_type == USB_MIXER_INV_BOOLEAN) {
 742                 cval->initialized = 1;
 743         } else {
 744                 int minchn = 0;
 745                 if (cval->cmask) {
 746                         int i;
 747                         for (i = 0; i < MAX_CHANNELS; i++)
 748                                 if (cval->cmask & (1 << i)) {
 749                                         minchn = i + 1;
 750                                         break;
 751                                 }
 752                 }
 753                 if (get_ctl_value(cval, GET_MAX, (cval->control << 8) | minchn, &cval->max) < 0 ||
 754                     get_ctl_value(cval, GET_MIN, (cval->control << 8) | minchn, &cval->min) < 0) {
 755                         snd_printd(KERN_ERR "%d:%d: cannot get min/max values for control %d (id %d)\n",
 756                                    cval->id, cval->mixer->ctrlif, cval->control, cval->id);
 757                         return -EINVAL;
 758                 }
 759                 if (get_ctl_value(cval, GET_RES, (cval->control << 8) | minchn, &cval->res) < 0) {
 760                         cval->res = 1;
 761                 } else {
 762                         int last_valid_res = cval->res;
 763
 764                         while (cval->res > 1) {
 765                                 if (set_ctl_value(cval, SET_RES, (cval->control << 8) | minchn, cval->res / 2) < 0)
 766                                         break;
 767                                 cval->res /= 2;
 768                         }
 769                         if (get_ctl_value(cval, GET_RES, (cval->control << 8) | minchn, &cval->res) < 0)
 770                                 cval->res = last_valid_res;
 771                 }
 772                 if (cval->res == 0)
 773                         cval->res = 1;
 774
 775                 /* Additional checks for the proper resolution
 776                  *
 777                  * Some devices report smaller resolutions than actually
 778                  * reacting.  They don't return errors but simply clip
 779                  * to the lower aligned value.
 780                  */
 781                 if (cval->min + cval->res < cval->max) {
 782                         int last_valid_res = cval->res;
 783                         int saved, test, check;
 784                         get_cur_mix_raw(cval, minchn, &saved);
 785                         for (;;) {
 786                                 test = saved;
 787                                 if (test < cval->max)
 788                                         test += cval->res;
 789                                 else
 790                                         test -= cval->res;
 791                                 if (test < cval->min || test > cval->max ||
 792                                     set_cur_mix_value(cval, minchn, 0, test) ||
 793                                     get_cur_mix_raw(cval, minchn, &check)) {
 794                                         cval->res = last_valid_res;
 795                                         break;
 796                                 }
 797                                 if (test == check)
 798                                         break;
 799                                 cval->res *= 2;
 800                         }
 801                         set_cur_mix_value(cval, minchn, 0, saved);
 802                 }
 803
 804                 cval->initialized = 1;
 805         }
 806
 807         /* USB descriptions contain the dB scale in 1/256 dB unit
 808          * while ALSA TLV contains in 1/100 dB unit
 809          */
 810         cval->dBmin = (convert_signed_value(cval, cval->min) * 100) / 256;
 811         cval->dBmax = (convert_signed_value(cval, cval->max) * 100) / 256;
 812         if (cval->dBmin > cval->dBmax) {
 813                 /* something is wrong; assume it's either from/to 0dB */
 814                 if (cval->dBmin < 0)
 815                         cval->dBmax = 0;
 816                 else if (cval->dBmin > 0)
 817                         cval->dBmin = 0;
 818                 if (cval->dBmin > cval->dBmax) {
 819                         /* totally crap, return an error */
 820                         return -EINVAL;
 821                 }
 822         }
 823
 824         return 0;
 825 }
 826
 827
 828 /* get a feature/mixer unit info */
 829 static int mixer_ctl_feature_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 830 {
 831         struct usb_mixer_elem_info *cval = kcontrol->private_data;
 832
 833         if (cval->val_type == USB_MIXER_BOOLEAN ||
 834             cval->val_type == USB_MIXER_INV_BOOLEAN)
 835                 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
 836         else
 837                 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 838         uinfo->count = cval->channels;
 839         if (cval->val_type == USB_MIXER_BOOLEAN ||
 840             cval->val_type == USB_MIXER_INV_BOOLEAN) {
 841                 uinfo->value.integer.min = 0;
 842                 uinfo->value.integer.max = 1;
 843         } else {
 844                 if (! cval->initialized)
 845                         get_min_max(cval,  0);
 846                 uinfo->value.integer.min = 0;
 847                 uinfo->value.integer.max =
 848                         (cval->max - cval->min + cval->res - 1) / cval->res;
 849         }
 850         return 0;
 851 }
 852
 853 /* get the current value from feature/mixer unit */
 854 static int mixer_ctl_feature_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
 855 {
 856         struct usb_mixer_elem_info *cval = kcontrol->private_data;
 857         int c, cnt, val, err;
 858
 859         ucontrol->value.integer.value[0] = cval->min;
 860         if (cval->cmask) {
 861                 cnt = 0;
 862                 for (c = 0; c < MAX_CHANNELS; c++) {
 863                         if (!(cval->cmask & (1 << c)))
 864                                 continue;
 865                         err = get_cur_mix_value(cval, c + 1, cnt, &val);
 866                         if (err < 0)
 867                                 return cval->mixer->ignore_ctl_error ? 0 : err;
 868                         val = get_relative_value(cval, val);
 869                         ucontrol->value.integer.value[cnt] = val;
 870                         cnt++;
 871                 }
 872                 return 0;
 873         } else {
 874                 /* master channel */
 875                 err = get_cur_mix_value(cval, 0, 0, &val);
 876                 if (err < 0)
 877                         return cval->mixer->ignore_ctl_error ? 0 : err;
 878                 val = get_relative_value(cval, val);
 879                 ucontrol->value.integer.value[0] = val;
 880         }
 881         return 0;
 882 }
 883
 884 /* put the current value to feature/mixer unit */
 885 static int mixer_ctl_feature_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
 886 {
 887         struct usb_mixer_elem_info *cval = kcontrol->private_data;
 888         int c, cnt, val, oval, err;
 889         int changed = 0;
 890
 891         if (cval->cmask) {
 892                 cnt = 0;
 893                 for (c = 0; c < MAX_CHANNELS; c++) {
 894                         if (!(cval->cmask & (1 << c)))
 895                                 continue;
 896                         err = get_cur_mix_value(cval, c + 1, cnt, &oval);
 897                         if (err < 0)
 898                                 return cval->mixer->ignore_ctl_error ? 0 : err;
 899                         val = ucontrol->value.integer.value[cnt];
 900                         val = get_abs_value(cval, val);
 901                         if (oval != val) {
 902                                 set_cur_mix_value(cval, c + 1, cnt, val);
 903                                 changed = 1;
 904                         }
 905                         cnt++;
 906                 }
 907         } else {
 908                 /* master channel */
 909                 err = get_cur_mix_value(cval, 0, 0, &oval);
 910                 if (err < 0)
 911                         return cval->mixer->ignore_ctl_error ? 0 : err;
 912                 val = ucontrol->value.integer.value[0];
 913                 val = get_abs_value(cval, val);
 914                 if (val != oval) {
 915                         set_cur_mix_value(cval, 0, 0, val);
 916                         changed = 1;
 917                 }
 918         }
 919         return changed;
 920 }
 921
 922 static struct snd_kcontrol_new usb_feature_unit_ctl = {
 923         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 924         .name = "", /* will be filled later manually */
 925         .info = mixer_ctl_feature_info,
 926         .get = mixer_ctl_feature_get,
 927         .put = mixer_ctl_feature_put,
 928 };
 929
 930
 931 /*
 932  * build a feature control
 933  */
 934
 935 static size_t append_ctl_name(struct snd_kcontrol *kctl, const char *str)
 936 {
 937         return strlcat(kctl->id.name, str, sizeof(kctl->id.name));
 938 }
 939
 940 static void build_feature_ctl(struct mixer_build *state, unsigned char *desc,
 941                               unsigned int ctl_mask, int control,
 942                               struct usb_audio_term *iterm, int unitid)
 943 {
 944         unsigned int len = 0;
 945         int mapped_name = 0;
 946         int nameid = desc[desc[0] - 1];
 947         struct snd_kcontrol *kctl;
 948         struct usb_mixer_elem_info *cval;
 949         const struct usbmix_name_map *map;
 950
 951         control++; /* change from zero-based to 1-based value */
 952
 953         if (control == USB_FEATURE_GEQ) {
 954                 /* FIXME: not supported yet */
 955                 return;
 956         }
 957
 958         map = find_map(state, unitid, control);
 959         if (check_ignored_ctl(map))
 960                 return;
 961
 962         cval = kzalloc(sizeof(*cval), GFP_KERNEL);
 963         if (! cval) {
 964                 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
 965                 return;
 966         }
 967         cval->mixer = state->mixer;
 968         cval->id = unitid;
 969         cval->control = control;
 970         cval->cmask = ctl_mask;
 971         cval->val_type = audio_feature_info[control-1].type;
 972         if (ctl_mask == 0)
 973                 cval->channels = 1;     /* master channel */
 974         else {
 975                 int i, c = 0;
 976                 for (i = 0; i < 16; i++)
 977                         if (ctl_mask & (1 << i))
 978                                 c++;
 979                 cval->channels = c;
 980         }
 981
 982         /* get min/max values */
 983         get_min_max(cval, 0);
 984
 985         kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval);
 986         if (! kctl) {
 987                 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
 988                 kfree(cval);
 989                 return;
 990         }
 991         kctl->private_free = usb_mixer_elem_free;
 992
 993         len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name));
 994         mapped_name = len != 0;
 995         if (! len && nameid)
 996                 len = snd_usb_copy_string_desc(state, nameid,
 997                                 kctl->id.name, sizeof(kctl->id.name));
 998
 999         switch (control) {
1000         case USB_FEATURE_MUTE:
1001         case USB_FEATURE_VOLUME:
1002                 /* determine the control name.  the rule is:
1003                  * - if a name id is given in descriptor, use it.
1004                  * - if the connected input can be determined, then use the name
1005                  *   of terminal type.
1006                  * - if the connected output can be determined, use it.
1007                  * - otherwise, anonymous name.
1008                  */
1009                 if (! len) {
1010                         len = get_term_name(state, iterm, kctl->id.name, sizeof(kctl->id.name), 1);
1011                         if (! len)
1012                                 len = get_term_name(state, &state->oterm, kctl->id.name, sizeof(kctl->id.name), 1);
1013                         if (! len)
1014                                 len = snprintf(kctl->id.name, sizeof(kctl->id.name),
1015                                                "Feature %d", unitid);
1016                 }
1017                 /* determine the stream direction:
1018                  * if the connected output is USB stream, then it's likely a
1019                  * capture stream.  otherwise it should be playback (hopefully :)
1020                  */
1021                 if (! mapped_name && ! (state->oterm.type >> 16)) {
1022                         if ((state->oterm.type & 0xff00) == 0x0100) {
1023                                 len = append_ctl_name(kctl, " Capture");
1024                         } else {
1025                                 len = append_ctl_name(kctl, " Playback");
1026                         }
1027                 }
1028                 append_ctl_name(kctl, control == USB_FEATURE_MUTE ?
1029                                 " Switch" : " Volume");
1030                 if (control == USB_FEATURE_VOLUME) {
1031                         kctl->tlv.c = mixer_vol_tlv;
1032                         kctl->vd[0].access |=
1033                                 SNDRV_CTL_ELEM_ACCESS_TLV_READ |
1034                                 SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK;
1035                         check_mapped_dB(map, cval);
1036                 }
1037                 break;
1038
1039         default:
1040                 if (! len)
1041                         strlcpy(kctl->id.name, audio_feature_info[control-1].name,
1042                                 sizeof(kctl->id.name));
1043                 break;
1044         }
1045
1046         /* volume control quirks */
1047         switch (state->chip->usb_id) {
1048         case USB_ID(0x0471, 0x0101):
1049         case USB_ID(0x0471, 0x0104):
1050         case USB_ID(0x0471, 0x0105):
1051         case USB_ID(0x0672, 0x1041):
1052         /* quirk for UDA1321/N101.
1053          * note that detection between firmware 2.1.1.7 (N101)
1054          * and later 2.1.1.21 is not very clear from datasheets.
1055          * I hope that the min value is -15360 for newer firmware --jk
1056          */
1057                 if (!strcmp(kctl->id.name, "PCM Playback Volume") &&
1058                     cval->min == -15616) {
1059                         snd_printk(KERN_INFO
1060                                  "set volume quirk for UDA1321/N101 chip\n");
1061                         cval->max = -256;
1062                 }
1063                 break;
1064
1065         case USB_ID(0x046d, 0x09a4):
1066                 if (!strcmp(kctl->id.name, "Mic Capture Volume")) {
1067                         snd_printk(KERN_INFO
1068                                 "set volume quirk for QuickCam E3500\n");
1069                         cval->min = 6080;
1070                         cval->max = 8768;
1071                         cval->res = 192;
1072                 }
1073                 break;
1074
1075         }
1076
1077         snd_printdd(KERN_INFO "[%d] FU [%s] ch = %d, val = %d/%d/%d\n",
1078                     cval->id, kctl->id.name, cval->channels, cval->min, cval->max, cval->res);
1079         add_control_to_empty(state, kctl);
1080 }
1081
1082
1083
1084 /*
1085  * parse a feature unit
1086  *
1087  * most of controlls are defined here.
1088  */
1089 static int parse_audio_feature_unit(struct mixer_build *state, int unitid, unsigned char *ftr)
1090 {
1091         int channels, i, j;
1092         struct usb_audio_term iterm;
1093         unsigned int master_bits, first_ch_bits;
1094         int err, csize;
1095
1096         if (ftr[0] < 7 || ! (csize = ftr[5]) || ftr[0] < 7 + csize) {
1097                 snd_printk(KERN_ERR "usbaudio: unit %u: invalid FEATURE_UNIT descriptor\n", unitid);
1098                 return -EINVAL;
1099         }
1100
1101         /* parse the source unit */
1102         if ((err = parse_audio_unit(state, ftr[4])) < 0)
1103                 return err;
1104
1105         /* determine the input source type and name */
1106         if (check_input_term(state, ftr[4], &iterm) < 0)
1107                 return -EINVAL;
1108
1109         channels = (ftr[0] - 7) / csize - 1;
1110
1111         master_bits = snd_usb_combine_bytes(ftr + 6, csize);
1112         /* master configuration quirks */
1113         switch (state->chip->usb_id) {
1114         case USB_ID(0x08bb, 0x2702):
1115                 snd_printk(KERN_INFO
1116                            "usbmixer: master volume quirk for PCM2702 chip\n");
1117                 /* disable non-functional volume control */
1118                 master_bits &= ~(1 << (USB_FEATURE_VOLUME - 1));
1119                 break;
1120         }
1121         if (channels > 0)
1122                 first_ch_bits = snd_usb_combine_bytes(ftr + 6 + csize, csize);
1123         else
1124                 first_ch_bits = 0;
1125         /* check all control types */
1126         for (i = 0; i < 10; i++) {
1127                 unsigned int ch_bits = 0;
1128                 for (j = 0; j < channels; j++) {
1129                         unsigned int mask = snd_usb_combine_bytes(ftr + 6 + csize * (j+1), csize);
1130                         if (mask & (1 << i))
1131                                 ch_bits |= (1 << j);
1132                 }
1133                 if (ch_bits & 1) /* the first channel must be set (for ease of programming) */
1134                         build_feature_ctl(state, ftr, ch_bits, i, &iterm, unitid);
1135                 if (master_bits & (1 << i))
1136                         build_feature_ctl(state, ftr, 0, i, &iterm, unitid);
1137         }
1138
1139         return 0;
1140 }
1141
1142
1143 /*
1144  * Mixer Unit
1145  */
1146
1147 /*
1148  * build a mixer unit control
1149  *
1150  * the callbacks are identical with feature unit.
1151  * input channel number (zero based) is given in control field instead.
1152  */
1153
1154 static void build_mixer_unit_ctl(struct mixer_build *state, unsigned char *desc,
1155                                  int in_pin, int in_ch, int unitid,
1156                                  struct usb_audio_term *iterm)
1157 {
1158         struct usb_mixer_elem_info *cval;
1159         unsigned int input_pins = desc[4];
1160         unsigned int num_outs = desc[5 + input_pins];
1161         unsigned int i, len;
1162         struct snd_kcontrol *kctl;
1163         const struct usbmix_name_map *map;
1164
1165         map = find_map(state, unitid, 0);
1166         if (check_ignored_ctl(map))
1167                 return;
1168
1169         cval = kzalloc(sizeof(*cval), GFP_KERNEL);
1170         if (! cval)
1171                 return;
1172
1173         cval->mixer = state->mixer;
1174         cval->id = unitid;
1175         cval->control = in_ch + 1; /* based on 1 */
1176         cval->val_type = USB_MIXER_S16;
1177         for (i = 0; i < num_outs; i++) {
1178                 if (check_matrix_bitmap(desc + 9 + input_pins, in_ch, i, num_outs)) {
1179                         cval->cmask |= (1 << i);
1180                         cval->channels++;
1181                 }
1182         }
1183
1184         /* get min/max values */
1185         get_min_max(cval, 0);
1186
1187         kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval);
1188         if (! kctl) {
1189                 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
1190                 kfree(cval);
1191                 return;
1192         }
1193         kctl->private_free = usb_mixer_elem_free;
1194
1195         len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name));
1196         if (! len)
1197                 len = get_term_name(state, iterm, kctl->id.name, sizeof(kctl->id.name), 0);
1198         if (! len)
1199                 len = sprintf(kctl->id.name, "Mixer Source %d", in_ch + 1);
1200         append_ctl_name(kctl, " Volume");
1201
1202         snd_printdd(KERN_INFO "[%d] MU [%s] ch = %d, val = %d/%d\n",
1203                     cval->id, kctl->id.name, cval->channels, cval->min, cval->max);
1204         add_control_to_empty(state, kctl);
1205 }
1206
1207
1208 /*
1209  * parse a mixer unit
1210  */
1211 static int parse_audio_mixer_unit(struct mixer_build *state, int unitid, unsigned char *desc)
1212 {
1213         struct usb_audio_term iterm;
1214         int input_pins, num_ins, num_outs;
1215         int pin, ich, err;
1216
1217         if (desc[0] < 11 || ! (input_pins = desc[4]) || ! (num_outs = desc[5 + input_pins])) {
1218                 snd_printk(KERN_ERR "invalid MIXER UNIT descriptor %d\n", unitid);
1219                 return -EINVAL;
1220         }
1221         /* no bmControls field (e.g. Maya44) -> ignore */
1222         if (desc[0] <= 10 + input_pins) {
1223                 snd_printdd(KERN_INFO "MU %d has no bmControls field\n", unitid);
1224                 return 0;
1225         }
1226
1227         num_ins = 0;
1228         ich = 0;
1229         for (pin = 0; pin < input_pins; pin++) {
1230                 err = parse_audio_unit(state, desc[5 + pin]);
1231                 if (err < 0)
1232                         return err;
1233                 err = check_input_term(state, desc[5 + pin], &iterm);
1234                 if (err < 0)
1235                         return err;
1236                 num_ins += iterm.channels;
1237                 for (; ich < num_ins; ++ich) {
1238                         int och, ich_has_controls = 0;
1239
1240                         for (och = 0; och < num_outs; ++och) {
1241                                 if (check_matrix_bitmap(desc + 9 + input_pins,
1242                                                         ich, och, num_outs)) {
1243                                         ich_has_controls = 1;
1244                                         break;
1245                                 }
1246                         }
1247                         if (ich_has_controls)
1248                                 build_mixer_unit_ctl(state, desc, pin, ich,
1249                                                      unitid, &iterm);
1250                 }
1251         }
1252         return 0;
1253 }
1254
1255
1256 /*
1257  * Processing Unit / Extension Unit
1258  */
1259
1260 /* get callback for processing/extension unit */
1261 static int mixer_ctl_procunit_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
1262 {
1263         struct usb_mixer_elem_info *cval = kcontrol->private_data;
1264         int err, val;
1265
1266         err = get_cur_ctl_value(cval, cval->control << 8, &val);
1267         if (err < 0 && cval->mixer->ignore_ctl_error) {
1268                 ucontrol->value.integer.value[0] = cval->min;
1269                 return 0;
1270         }
1271         if (err < 0)
1272                 return err;
1273         val = get_relative_value(cval, val);
1274         ucontrol->value.integer.value[0] = val;
1275         return 0;
1276 }
1277
1278 /* put callback for processing/extension unit */
1279 static int mixer_ctl_procunit_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
1280 {
1281         struct usb_mixer_elem_info *cval = kcontrol->private_data;
1282         int val, oval, err;
1283
1284         err = get_cur_ctl_value(cval, cval->control << 8, &oval);
1285         if (err < 0) {
1286                 if (cval->mixer->ignore_ctl_error)
1287                         return 0;
1288                 return err;
1289         }
1290         val = ucontrol->value.integer.value[0];
1291         val = get_abs_value(cval, val);
1292         if (val != oval) {
1293                 set_cur_ctl_value(cval, cval->control << 8, val);
1294                 return 1;
1295         }
1296         return 0;
1297 }
1298
1299 /* alsa control interface for processing/extension unit */
1300 static struct snd_kcontrol_new mixer_procunit_ctl = {
1301         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1302         .name = "", /* will be filled later */
1303         .info = mixer_ctl_feature_info,
1304         .get = mixer_ctl_procunit_get,
1305         .put = mixer_ctl_procunit_put,
1306 };
1307
1308
1309 /*
1310  * predefined data for processing units
1311  */
1312 struct procunit_value_info {
1313         int control;
1314         char *suffix;
1315         int val_type;
1316         int min_value;
1317 };
1318
1319 struct procunit_info {
1320         int type;
1321         char *name;
1322         struct procunit_value_info *values;
1323 };
1324
1325 static struct procunit_value_info updown_proc_info[] = {
1326         { USB_PROC_UPDOWN_SWITCH, "Switch", USB_MIXER_BOOLEAN },
1327         { USB_PROC_UPDOWN_MODE_SEL, "Mode Select", USB_MIXER_U8, 1 },
1328         { 0 }
1329 };
1330 static struct procunit_value_info prologic_proc_info[] = {
1331         { USB_PROC_PROLOGIC_SWITCH, "Switch", USB_MIXER_BOOLEAN },
1332         { USB_PROC_PROLOGIC_MODE_SEL, "Mode Select", USB_MIXER_U8, 1 },
1333         { 0 }
1334 };
1335 static struct procunit_value_info threed_enh_proc_info[] = {
1336         { USB_PROC_3DENH_SWITCH, "Switch", USB_MIXER_BOOLEAN },
1337         { USB_PROC_3DENH_SPACE, "Spaciousness", USB_MIXER_U8 },
1338         { 0 }
1339 };
1340 static struct procunit_value_info reverb_proc_info[] = {
1341         { USB_PROC_REVERB_SWITCH, "Switch", USB_MIXER_BOOLEAN },
1342         { USB_PROC_REVERB_LEVEL, "Level", USB_MIXER_U8 },
1343         { USB_PROC_REVERB_TIME, "Time", USB_MIXER_U16 },
1344         { USB_PROC_REVERB_DELAY, "Delay", USB_MIXER_U8 },
1345         { 0 }
1346 };
1347 static struct procunit_value_info chorus_proc_info[] = {
1348         { USB_PROC_CHORUS_SWITCH, "Switch", USB_MIXER_BOOLEAN },
1349         { USB_PROC_CHORUS_LEVEL, "Level", USB_MIXER_U8 },
1350         { USB_PROC_CHORUS_RATE, "Rate", USB_MIXER_U16 },
1351         { USB_PROC_CHORUS_DEPTH, "Depth", USB_MIXER_U16 },
1352         { 0 }
1353 };
1354 static struct procunit_value_info dcr_proc_info[] = {
1355         { USB_PROC_DCR_SWITCH, "Switch", USB_MIXER_BOOLEAN },
1356         { USB_PROC_DCR_RATIO, "Ratio", USB_MIXER_U16 },
1357         { USB_PROC_DCR_MAX_AMP, "Max Amp", USB_MIXER_S16 },
1358         { USB_PROC_DCR_THRESHOLD, "Threshold", USB_MIXER_S16 },
1359         { USB_PROC_DCR_ATTACK, "Attack Time", USB_MIXER_U16 },
1360         { USB_PROC_DCR_RELEASE, "Release Time", USB_MIXER_U16 },
1361         { 0 }
1362 };
1363
1364 static struct procunit_info procunits[] = {
1365         { USB_PROC_UPDOWN, "Up Down", updown_proc_info },
1366         { USB_PROC_PROLOGIC, "Dolby Prologic", prologic_proc_info },
1367         { USB_PROC_3DENH, "3D Stereo Extender", threed_enh_proc_info },
1368         { USB_PROC_REVERB, "Reverb", reverb_proc_info },
1369         { USB_PROC_CHORUS, "Chorus", chorus_proc_info },
1370         { USB_PROC_DCR, "DCR", dcr_proc_info },
1371         { 0 },
1372 };
1373 /*
1374  * predefined data for extension units
1375  */
1376 static struct procunit_value_info clock_rate_xu_info[] = {
1377        { USB_XU_CLOCK_RATE_SELECTOR, "Selector", USB_MIXER_U8, 0 },
1378        { 0 }
1379 };
1380 static struct procunit_value_info clock_source_xu_info[] = {
1381         { USB_XU_CLOCK_SOURCE_SELECTOR, "External", USB_MIXER_BOOLEAN },
1382         { 0 }
1383 };
1384 static struct procunit_value_info spdif_format_xu_info[] = {
1385         { USB_XU_DIGITAL_FORMAT_SELECTOR, "SPDIF/AC3", USB_MIXER_BOOLEAN },
1386         { 0 }
1387 };
1388 static struct procunit_value_info soft_limit_xu_info[] = {
1389         { USB_XU_SOFT_LIMIT_SELECTOR, " ", USB_MIXER_BOOLEAN },
1390         { 0 }
1391 };
1392 static struct procunit_info extunits[] = {
1393         { USB_XU_CLOCK_RATE, "Clock rate", clock_rate_xu_info },
1394         { USB_XU_CLOCK_SOURCE, "DigitalIn CLK source", clock_source_xu_info },
1395         { USB_XU_DIGITAL_IO_STATUS, "DigitalOut format:", spdif_format_xu_info },
1396         { USB_XU_DEVICE_OPTIONS, "AnalogueIn Soft Limit", soft_limit_xu_info },
1397         { 0 }
1398 };
1399 /*
1400  * build a processing/extension unit
1401  */
1402 static int build_audio_procunit(struct mixer_build *state, int unitid, unsigned char *dsc, struct procunit_info *list, char *name)
1403 {
1404         int num_ins = dsc[6];
1405         struct usb_mixer_elem_info *cval;
1406         struct snd_kcontrol *kctl;
1407         int i, err, nameid, type, len;
1408         struct procunit_info *info;
1409         struct procunit_value_info *valinfo;
1410         const struct usbmix_name_map *map;
1411         static struct procunit_value_info default_value_info[] = {
1412                 { 0x01, "Switch", USB_MIXER_BOOLEAN },
1413                 { 0 }
1414         };
1415         static struct procunit_info default_info = {
1416                 0, NULL, default_value_info
1417         };
1418
1419         if (dsc[0] < 13 || dsc[0] < 13 + num_ins || dsc[0] < num_ins + dsc[11 + num_ins]) {
1420                 snd_printk(KERN_ERR "invalid %s descriptor (id %d)\n", name, unitid);
1421                 return -EINVAL;
1422         }
1423
1424         for (i = 0; i < num_ins; i++) {
1425                 if ((err = parse_audio_unit(state, dsc[7 + i])) < 0)
1426                         return err;
1427         }
1428
1429         type = combine_word(&dsc[4]);
1430         for (info = list; info && info->type; info++)
1431                 if (info->type == type)
1432                         break;
1433         if (! info || ! info->type)
1434                 info = &default_info;
1435
1436         for (valinfo = info->values; valinfo->control; valinfo++) {
1437                 /* FIXME: bitmap might be longer than 8bit */
1438                 if (! (dsc[12 + num_ins] & (1 << (valinfo->control - 1))))
1439                         continue;
1440                 map = find_map(state, unitid, valinfo->control);
1441                 if (check_ignored_ctl(map))
1442                         continue;
1443                 cval = kzalloc(sizeof(*cval), GFP_KERNEL);
1444                 if (! cval) {
1445                         snd_printk(KERN_ERR "cannot malloc kcontrol\n");
1446                         return -ENOMEM;
1447                 }
1448                 cval->mixer = state->mixer;
1449                 cval->id = unitid;
1450                 cval->control = valinfo->control;
1451                 cval->val_type = valinfo->val_type;
1452                 cval->channels = 1;
1453
1454                 /* get min/max values */
1455                 if (type == USB_PROC_UPDOWN && cval->control == USB_PROC_UPDOWN_MODE_SEL) {
1456                         /* FIXME: hard-coded */
1457                         cval->min = 1;
1458                         cval->max = dsc[15];
1459                         cval->res = 1;
1460                         cval->initialized = 1;
1461                 } else {
1462                         if (type == USB_XU_CLOCK_RATE) {
1463                                 /* E-Mu USB 0404/0202/TrackerPre
1464                                  * samplerate control quirk
1465                                  */
1466                                 cval->min = 0;
1467                                 cval->max = 5;
1468                                 cval->res = 1;
1469                                 cval->initialized = 1;
1470                         } else
1471                                 get_min_max(cval, valinfo->min_value);
1472                 }
1473
1474                 kctl = snd_ctl_new1(&mixer_procunit_ctl, cval);
1475                 if (! kctl) {
1476                         snd_printk(KERN_ERR "cannot malloc kcontrol\n");
1477                         kfree(cval);
1478                         return -ENOMEM;
1479                 }
1480                 kctl->private_free = usb_mixer_elem_free;
1481
1482                 if (check_mapped_name(map, kctl->id.name,
1483                                                 sizeof(kctl->id.name)))
1484                         /* nothing */ ;
1485                 else if (info->name)
1486                         strlcpy(kctl->id.name, info->name, sizeof(kctl->id.name));
1487                 else {
1488                         nameid = dsc[12 + num_ins + dsc[11 + num_ins]];
1489                         len = 0;
1490                         if (nameid)
1491                                 len = snd_usb_copy_string_desc(state, nameid, kctl->id.name, sizeof(kctl->id.name));
1492                         if (! len)
1493                                 strlcpy(kctl->id.name, name, sizeof(kctl->id.name));
1494                 }
1495                 append_ctl_name(kctl, " ");
1496                 append_ctl_name(kctl, valinfo->suffix);
1497
1498                 snd_printdd(KERN_INFO "[%d] PU [%s] ch = %d, val = %d/%d\n",
1499                             cval->id, kctl->id.name, cval->channels, cval->min, cval->max);
1500                 if ((err = add_control_to_empty(state, kctl)) < 0)
1501                         return err;
1502         }
1503         return 0;
1504 }
1505
1506
1507 static int parse_audio_processing_unit(struct mixer_build *state, int unitid, unsigned char *desc)
1508 {
1509         return build_audio_procunit(state, unitid, desc, procunits, "Processing Unit");
1510 }
1511
1512 static int parse_audio_extension_unit(struct mixer_build *state, int unitid, unsigned char *desc)
1513 {
1514         return build_audio_procunit(state, unitid, desc, extunits, "Extension Unit");
1515 }
1516
1517
1518 /*
1519  * Selector Unit
1520  */
1521
1522 /* info callback for selector unit
1523  * use an enumerator type for routing
1524  */
1525 static int mixer_ctl_selector_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
1526 {
1527         struct usb_mixer_elem_info *cval = kcontrol->private_data;
1528         char **itemlist = (char **)kcontrol->private_value;
1529
1530         if (snd_BUG_ON(!itemlist))
1531                 return -EINVAL;
1532         uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
1533         uinfo->count = 1;
1534         uinfo->value.enumerated.items = cval->max;
1535         if ((int)uinfo->value.enumerated.item >= cval->max)
1536                 uinfo->value.enumerated.item = cval->max - 1;
1537         strcpy(uinfo->value.enumerated.name, itemlist[uinfo->value.enumerated.item]);
1538         return 0;
1539 }
1540
1541 /* get callback for selector unit */
1542 static int mixer_ctl_selector_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
1543 {
1544         struct usb_mixer_elem_info *cval = kcontrol->private_data;
1545         int val, err;
1546
1547         err = get_cur_ctl_value(cval, 0, &val);
1548         if (err < 0) {
1549                 if (cval->mixer->ignore_ctl_error) {
1550                         ucontrol->value.enumerated.item[0] = 0;
1551                         return 0;
1552                 }
1553                 return err;
1554         }
1555         val = get_relative_value(cval, val);
1556         ucontrol->value.enumerated.item[0] = val;
1557         return 0;
1558 }
1559
1560 /* put callback for selector unit */
1561 static int mixer_ctl_selector_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
1562 {
1563         struct usb_mixer_elem_info *cval = kcontrol->private_data;
1564         int val, oval, err;
1565
1566         err = get_cur_ctl_value(cval, 0, &oval);
1567         if (err < 0) {
1568                 if (cval->mixer->ignore_ctl_error)
1569                         return 0;
1570                 return err;
1571         }
1572         val = ucontrol->value.enumerated.item[0];
1573         val = get_abs_value(cval, val);
1574         if (val != oval) {
1575                 set_cur_ctl_value(cval, 0, val);
1576                 return 1;
1577         }
1578         return 0;
1579 }
1580
1581 /* alsa control interface for selector unit */
1582 static struct snd_kcontrol_new mixer_selectunit_ctl = {
1583         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1584         .name = "", /* will be filled later */
1585         .info = mixer_ctl_selector_info,
1586         .get = mixer_ctl_selector_get,
1587         .put = mixer_ctl_selector_put,
1588 };
1589
1590
1591 /* private free callback.
1592  * free both private_data and private_value
1593  */
1594 static void usb_mixer_selector_elem_free(struct snd_kcontrol *kctl)
1595 {
1596         int i, num_ins = 0;
1597
1598         if (kctl->private_data) {
1599                 struct usb_mixer_elem_info *cval = kctl->private_data;
1600                 num_ins = cval->max;
1601                 kfree(cval);
1602                 kctl->private_data = NULL;
1603         }
1604         if (kctl->private_value) {
1605                 char **itemlist = (char **)kctl->private_value;
1606                 for (i = 0; i < num_ins; i++)
1607                         kfree(itemlist[i]);
1608                 kfree(itemlist);
1609                 kctl->private_value = 0;
1610         }
1611 }
1612
1613 /*
1614  * parse a selector unit
1615  */
1616 static int parse_audio_selector_unit(struct mixer_build *state, int unitid, unsigned char *desc)
1617 {
1618         unsigned int num_ins = desc[4];
1619         unsigned int i, nameid, len;
1620         int err;
1621         struct usb_mixer_elem_info *cval;
1622         struct snd_kcontrol *kctl;
1623         const struct usbmix_name_map *map;
1624         char **namelist;
1625
1626         if (! num_ins || desc[0] < 5 + num_ins) {
1627                 snd_printk(KERN_ERR "invalid SELECTOR UNIT descriptor %d\n", unitid);
1628                 return -EINVAL;
1629         }
1630
1631         for (i = 0; i < num_ins; i++) {
1632                 if ((err = parse_audio_unit(state, desc[5 + i])) < 0)
1633                         return err;
1634         }
1635
1636         if (num_ins == 1) /* only one ? nonsense! */
1637                 return 0;
1638
1639         map = find_map(state, unitid, 0);
1640         if (check_ignored_ctl(map))
1641                 return 0;
1642
1643         cval = kzalloc(sizeof(*cval), GFP_KERNEL);
1644         if (! cval) {
1645                 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
1646                 return -ENOMEM;
1647         }
1648         cval->mixer = state->mixer;
1649         cval->id = unitid;
1650         cval->val_type = USB_MIXER_U8;
1651         cval->channels = 1;
1652         cval->min = 1;
1653         cval->max = num_ins;
1654         cval->res = 1;
1655         cval->initialized = 1;
1656
1657         namelist = kmalloc(sizeof(char *) * num_ins, GFP_KERNEL);
1658         if (! namelist) {
1659                 snd_printk(KERN_ERR "cannot malloc\n");
1660                 kfree(cval);
1661                 return -ENOMEM;
1662         }
1663 #define MAX_ITEM_NAME_LEN       64
1664         for (i = 0; i < num_ins; i++) {
1665                 struct usb_audio_term iterm;
1666                 len = 0;
1667                 namelist[i] = kmalloc(MAX_ITEM_NAME_LEN, GFP_KERNEL);
1668                 if (! namelist[i]) {
1669                         snd_printk(KERN_ERR "cannot malloc\n");
1670                         while (i--)
1671                                 kfree(namelist[i]);
1672                         kfree(namelist);
1673                         kfree(cval);
1674                         return -ENOMEM;
1675                 }
1676                 len = check_mapped_selector_name(state, unitid, i, namelist[i],
1677                                                  MAX_ITEM_NAME_LEN);
1678                 if (! len && check_input_term(state, desc[5 + i], &iterm) >= 0)
1679                         len = get_term_name(state, &iterm, namelist[i], MAX_ITEM_NAME_LEN, 0);
1680                 if (! len)
1681                         sprintf(namelist[i], "Input %d", i);
1682         }
1683
1684         kctl = snd_ctl_new1(&mixer_selectunit_ctl, cval);
1685         if (! kctl) {
1686                 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
1687                 kfree(namelist);
1688                 kfree(cval);
1689                 return -ENOMEM;
1690         }
1691         kctl->private_value = (unsigned long)namelist;
1692         kctl->private_free = usb_mixer_selector_elem_free;
1693
1694         nameid = desc[desc[0] - 1];
1695         len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name));
1696         if (len)
1697                 ;
1698         else if (nameid)
1699                 snd_usb_copy_string_desc(state, nameid, kctl->id.name, sizeof(kctl->id.name));
1700         else {
1701                 len = get_term_name(state, &state->oterm,
1702                                     kctl->id.name, sizeof(kctl->id.name), 0);
1703                 if (! len)
1704                         strlcpy(kctl->id.name, "USB", sizeof(kctl->id.name));
1705
1706                 if ((state->oterm.type & 0xff00) == 0x0100)
1707                         append_ctl_name(kctl, " Capture Source");
1708                 else
1709                         append_ctl_name(kctl, " Playback Source");
1710         }
1711
1712         snd_printdd(KERN_INFO "[%d] SU [%s] items = %d\n",
1713                     cval->id, kctl->id.name, num_ins);
1714         if ((err = add_control_to_empty(state, kctl)) < 0)
1715                 return err;
1716
1717         return 0;
1718 }
1719
1720
1721 /*
1722  * parse an audio unit recursively
1723  */
1724
1725 static int parse_audio_unit(struct mixer_build *state, int unitid)
1726 {
1727         unsigned char *p1;
1728
1729         if (test_and_set_bit(unitid, state->unitbitmap))
1730                 return 0; /* the unit already visited */
1731
1732         p1 = find_audio_control_unit(state, unitid);
1733         if (!p1) {
1734                 snd_printk(KERN_ERR "usbaudio: unit %d not found!\n", unitid);
1735                 return -EINVAL;
1736         }
1737
1738         switch (p1[2]) {
1739         case INPUT_TERMINAL:
1740                 return 0; /* NOP */
1741         case MIXER_UNIT:
1742                 return parse_audio_mixer_unit(state, unitid, p1);
1743         case SELECTOR_UNIT:
1744                 return parse_audio_selector_unit(state, unitid, p1);
1745         case FEATURE_UNIT:
1746                 return parse_audio_feature_unit(state, unitid, p1);
1747         case PROCESSING_UNIT:
1748                 return parse_audio_processing_unit(state, unitid, p1);
1749         case EXTENSION_UNIT:
1750                 return parse_audio_extension_unit(state, unitid, p1);
1751         default:
1752                 snd_printk(KERN_ERR "usbaudio: unit %u: unexpected type 0x%02x\n", unitid, p1[2]);
1753                 return -EINVAL;
1754         }
1755 }
1756
1757 static void snd_usb_mixer_free(struct usb_mixer_interface *mixer)
1758 {
1759         kfree(mixer->id_elems);
1760         if (mixer->urb) {
1761                 kfree(mixer->urb->transfer_buffer);
1762                 usb_free_urb(mixer->urb);
1763         }
1764         usb_free_urb(mixer->rc_urb);
1765         kfree(mixer->rc_setup_packet);
1766         kfree(mixer);
1767 }
1768
1769 static int snd_usb_mixer_dev_free(struct snd_device *device)
1770 {
1771         struct usb_mixer_interface *mixer = device->device_data;
1772         snd_usb_mixer_free(mixer);
1773         return 0;
1774 }
1775
1776 /*
1777  * create mixer controls
1778  *
1779  * walk through all OUTPUT_TERMINAL descriptors to search for mixers
1780  */
1781 static int snd_usb_mixer_controls(struct usb_mixer_interface *mixer)
1782 {
1783         unsigned char *desc;
1784         struct mixer_build state;
1785         int err;
1786         const struct usbmix_ctl_map *map;
1787         struct usb_host_interface *hostif;
1788
1789         hostif = &usb_ifnum_to_if(mixer->chip->dev, mixer->ctrlif)->altsetting[0];
1790         memset(&state, 0, sizeof(state));
1791         state.chip = mixer->chip;
1792         state.mixer = mixer;
1793         state.buffer = hostif->extra;
1794         state.buflen = hostif->extralen;
1795
1796         /* check the mapping table */
1797         for (map = usbmix_ctl_maps; map->id; map++) {
1798                 if (map->id == state.chip->usb_id) {
1799                         state.map = map->map;
1800                         state.selector_map = map->selector_map;
1801                         mixer->ignore_ctl_error = map->ignore_ctl_error;
1802                         break;
1803                 }
1804         }
1805
1806         desc = NULL;
1807         while ((desc = snd_usb_find_csint_desc(hostif->extra, hostif->extralen, desc, OUTPUT_TERMINAL)) != NULL) {
1808                 if (desc[0] < 9)
1809                         continue; /* invalid descriptor? */
1810                 set_bit(desc[3], state.unitbitmap);  /* mark terminal ID as visited */
1811                 state.oterm.id = desc[3];
1812                 state.oterm.type = combine_word(&desc[4]);
1813                 state.oterm.name = desc[8];
1814                 err = parse_audio_unit(&state, desc[7]);
1815                 if (err < 0)
1816                         return err;
1817         }
1818         return 0;
1819 }
1820
1821 static void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer,
1822                                     int unitid)
1823 {
1824         struct usb_mixer_elem_info *info;
1825
1826         for (info = mixer->id_elems[unitid]; info; info = info->next_id_elem)
1827                 snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
1828                                info->elem_id);
1829 }
1830
1831 static void snd_usb_mixer_dump_cval(struct snd_info_buffer *buffer,
1832                                     int unitid,
1833                                     struct usb_mixer_elem_info *cval)
1834 {
1835         static char *val_types[] = {"BOOLEAN", "INV_BOOLEAN",
1836                                     "S8", "U8", "S16", "U16"};
1837         snd_iprintf(buffer, "  Unit: %i\n", unitid);
1838         if (cval->elem_id)
1839                 snd_iprintf(buffer, "    Control: name=\"%s\", index=%i\n",
1840                                 cval->elem_id->name, cval->elem_id->index);
1841         snd_iprintf(buffer, "    Info: id=%i, control=%i, cmask=0x%x, "
1842                             "channels=%i, type=\"%s\"\n", cval->id,
1843                             cval->control, cval->cmask, cval->channels,
1844                             val_types[cval->val_type]);
1845         snd_iprintf(buffer, "    Volume: min=%i, max=%i, dBmin=%i, dBmax=%i\n",
1846                             cval->min, cval->max, cval->dBmin, cval->dBmax);
1847 }
1848
1849 static void snd_usb_mixer_proc_read(struct snd_info_entry *entry,
1850                                     struct snd_info_buffer *buffer)
1851 {
1852         struct snd_usb_audio *chip = entry->private_data;
1853         struct usb_mixer_interface *mixer;
1854         struct usb_mixer_elem_info *cval;
1855         int unitid;
1856
1857         list_for_each_entry(mixer, &chip->mixer_list, list) {
1858                 snd_iprintf(buffer,
1859                         "USB Mixer: usb_id=0x%08x, ctrlif=%i, ctlerr=%i\n",
1860                                 chip->usb_id, mixer->ctrlif,
1861                                 mixer->ignore_ctl_error);
1862                 snd_iprintf(buffer, "Card: %s\n", chip->card->longname);
1863                 for (unitid = 0; unitid < MAX_ID_ELEMS; unitid++) {
1864                         for (cval = mixer->id_elems[unitid]; cval;
1865                                                 cval = cval->next_id_elem)
1866                                 snd_usb_mixer_dump_cval(buffer, unitid, cval);
1867                 }
1868         }
1869 }
1870
1871 static void snd_usb_mixer_memory_change(struct usb_mixer_interface *mixer,
1872                                         int unitid)
1873 {
1874         if (!mixer->rc_cfg)
1875                 return;
1876         /* unit ids specific to Extigy/Audigy 2 NX: */
1877         switch (unitid) {
1878         case 0: /* remote control */
1879                 mixer->rc_urb->dev = mixer->chip->dev;
1880                 usb_submit_urb(mixer->rc_urb, GFP_ATOMIC);
1881                 break;
1882         case 4: /* digital in jack */
1883         case 7: /* line in jacks */
1884         case 19: /* speaker out jacks */
1885         case 20: /* headphones out jack */
1886                 break;
1887         /* live24ext: 4 = line-in jack */
1888         case 3: /* hp-out jack (may actuate Mute) */
1889                 if (mixer->chip->usb_id == USB_ID(0x041e, 0x3040) ||
1890                     mixer->chip->usb_id == USB_ID(0x041e, 0x3048))
1891                         snd_usb_mixer_notify_id(mixer, mixer->rc_cfg->mute_mixer_id);
1892                 break;
1893         default:
1894                 snd_printd(KERN_DEBUG "memory change in unknown unit %d\n", unitid);
1895                 break;
1896         }
1897 }
1898
1899 static void snd_usb_mixer_status_complete(struct urb *urb)
1900 {
1901         struct usb_mixer_interface *mixer = urb->context;
1902
1903         if (urb->status == 0) {
1904                 u8 *buf = urb->transfer_buffer;
1905                 int i;
1906
1907                 for (i = urb->actual_length; i >= 2; buf += 2, i -= 2) {
1908                         snd_printd(KERN_DEBUG "status interrupt: %02x %02x\n",
1909                                    buf[0], buf[1]);
1910                         /* ignore any notifications not from the control interface */
1911                         if ((buf[0] & 0x0f) != 0)
1912                                 continue;
1913                         if (!(buf[0] & 0x40))
1914                                 snd_usb_mixer_notify_id(mixer, buf[1]);
1915                         else
1916                                 snd_usb_mixer_memory_change(mixer, buf[1]);
1917                 }
1918         }
1919         if (urb->status != -ENOENT && urb->status != -ECONNRESET) {
1920                 urb->dev = mixer->chip->dev;
1921                 usb_submit_urb(urb, GFP_ATOMIC);
1922         }
1923 }
1924
1925 /* create the handler for the optional status interrupt endpoint */
1926 static int snd_usb_mixer_status_create(struct usb_mixer_interface *mixer)
1927 {
1928         struct usb_host_interface *hostif;
1929         struct usb_endpoint_descriptor *ep;
1930         void *transfer_buffer;
1931         int buffer_length;
1932         unsigned int epnum;
1933
1934         hostif = &usb_ifnum_to_if(mixer->chip->dev, mixer->ctrlif)->altsetting[0];
1935         /* we need one interrupt input endpoint */
1936         if (get_iface_desc(hostif)->bNumEndpoints < 1)
1937                 return 0;
1938         ep = get_endpoint(hostif, 0);
1939         if (!usb_endpoint_dir_in(ep) || !usb_endpoint_xfer_int(ep))
1940                 return 0;
1941
1942         epnum = usb_endpoint_num(ep);
1943         buffer_length = le16_to_cpu(ep->wMaxPacketSize);
1944         transfer_buffer = kmalloc(buffer_length, GFP_KERNEL);
1945         if (!transfer_buffer)
1946                 return -ENOMEM;
1947         mixer->urb = usb_alloc_urb(0, GFP_KERNEL);
1948         if (!mixer->urb) {
1949                 kfree(transfer_buffer);
1950                 return -ENOMEM;
1951         }
1952         usb_fill_int_urb(mixer->urb, mixer->chip->dev,
1953                          usb_rcvintpipe(mixer->chip->dev, epnum),
1954                          transfer_buffer, buffer_length,
1955                          snd_usb_mixer_status_complete, mixer, ep->bInterval);
1956         usb_submit_urb(mixer->urb, GFP_KERNEL);
1957         return 0;
1958 }
1959
1960 static void snd_usb_soundblaster_remote_complete(struct urb *urb)
1961 {
1962         struct usb_mixer_interface *mixer = urb->context;
1963         const struct rc_config *rc = mixer->rc_cfg;
1964         u32 code;
1965
1966         if (urb->status < 0 || urb->actual_length < rc->min_packet_length)
1967                 return;
1968
1969         code = mixer->rc_buffer[rc->offset];
1970         if (rc->length == 2)
1971                 code |= mixer->rc_buffer[rc->offset + 1] << 8;
1972
1973         /* the Mute button actually changes the mixer control */
1974         if (code == rc->mute_code)
1975                 snd_usb_mixer_notify_id(mixer, rc->mute_mixer_id);
1976         mixer->rc_code = code;
1977         wmb();
1978         wake_up(&mixer->rc_waitq);
1979 }
1980
1981 static long snd_usb_sbrc_hwdep_read(struct snd_hwdep *hw, char __user *buf,
1982                                      long count, loff_t *offset)
1983 {
1984         struct usb_mixer_interface *mixer = hw->private_data;
1985         int err;
1986         u32 rc_code;
1987
1988         if (count != 1 && count != 4)
1989                 return -EINVAL;
1990         err = wait_event_interruptible(mixer->rc_waitq,
1991                                        (rc_code = xchg(&mixer->rc_code, 0)) != 0);
1992         if (err == 0) {
1993                 if (count == 1)
1994                         err = put_user(rc_code, buf);
1995                 else
1996                         err = put_user(rc_code, (u32 __user *)buf);
1997         }
1998         return err < 0 ? err : count;
1999 }
2000
2001 static unsigned int snd_usb_sbrc_hwdep_poll(struct snd_hwdep *hw, struct file *file,
2002                                             poll_table *wait)
2003 {
2004         struct usb_mixer_interface *mixer = hw->private_data;
2005
2006         poll_wait(file, &mixer->rc_waitq, wait);
2007         return mixer->rc_code ? POLLIN | POLLRDNORM : 0;
2008 }
2009
2010 static int snd_usb_soundblaster_remote_init(struct usb_mixer_interface *mixer)
2011 {
2012         struct snd_hwdep *hwdep;
2013         int err, len, i;
2014
2015         for (i = 0; i < ARRAY_SIZE(rc_configs); ++i)
2016                 if (rc_configs[i].usb_id == mixer->chip->usb_id)
2017                         break;
2018         if (i >= ARRAY_SIZE(rc_configs))
2019                 return 0;
2020         mixer->rc_cfg = &rc_configs[i];
2021
2022         len = mixer->rc_cfg->packet_length;
2023
2024         init_waitqueue_head(&mixer->rc_waitq);
2025         err = snd_hwdep_new(mixer->chip->card, "SB remote control", 0, &hwdep);
2026         if (err < 0)
2027                 return err;
2028         snprintf(hwdep->name, sizeof(hwdep->name),
2029                  "%s remote control", mixer->chip->card->shortname);
2030         hwdep->iface = SNDRV_HWDEP_IFACE_SB_RC;
2031         hwdep->private_data = mixer;
2032         hwdep->ops.read = snd_usb_sbrc_hwdep_read;
2033         hwdep->ops.poll = snd_usb_sbrc_hwdep_poll;
2034         hwdep->exclusive = 1;
2035
2036         mixer->rc_urb = usb_alloc_urb(0, GFP_KERNEL);
2037         if (!mixer->rc_urb)
2038                 return -ENOMEM;
2039         mixer->rc_setup_packet = kmalloc(sizeof(*mixer->rc_setup_packet), GFP_KERNEL);
2040         if (!mixer->rc_setup_packet) {
2041                 usb_free_urb(mixer->rc_urb);
2042                 mixer->rc_urb = NULL;
2043                 return -ENOMEM;
2044         }
2045         mixer->rc_setup_packet->bRequestType =
2046                 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE;
2047         mixer->rc_setup_packet->bRequest = GET_MEM;
2048         mixer->rc_setup_packet->wValue = cpu_to_le16(0);
2049         mixer->rc_setup_packet->wIndex = cpu_to_le16(0);
2050         mixer->rc_setup_packet->wLength = cpu_to_le16(len);
2051         usb_fill_control_urb(mixer->rc_urb, mixer->chip->dev,
2052                              usb_rcvctrlpipe(mixer->chip->dev, 0),
2053                              (u8*)mixer->rc_setup_packet, mixer->rc_buffer, len,
2054                              snd_usb_soundblaster_remote_complete, mixer);
2055         return 0;
2056 }
2057
2058 #define snd_audigy2nx_led_info          snd_ctl_boolean_mono_info
2059
2060 static int snd_audigy2nx_led_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
2061 {
2062         struct usb_mixer_interface *mixer = snd_kcontrol_chip(kcontrol);
2063         int index = kcontrol->private_value;
2064
2065         ucontrol->value.integer.value[0] = mixer->audigy2nx_leds[index];
2066         return 0;
2067 }
2068
2069 static int snd_audigy2nx_led_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
2070 {
2071         struct usb_mixer_interface *mixer = snd_kcontrol_chip(kcontrol);
2072         int index = kcontrol->private_value;
2073         int value = ucontrol->value.integer.value[0];
2074         int err, changed;
2075
2076         if (value > 1)
2077                 return -EINVAL;
2078         changed = value != mixer->audigy2nx_leds[index];
2079         err = snd_usb_ctl_msg(mixer->chip->dev,
2080                               usb_sndctrlpipe(mixer->chip->dev, 0), 0x24,
2081                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
2082                               value, index + 2, NULL, 0, 100);
2083         if (err < 0)
2084                 return err;
2085         mixer->audigy2nx_leds[index] = value;
2086         return changed;
2087 }
2088
2089 static struct snd_kcontrol_new snd_audigy2nx_controls[] = {
2090         {
2091                 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
2092                 .name = "CMSS LED Switch",
2093                 .info = snd_audigy2nx_led_info,
2094                 .get = snd_audigy2nx_led_get,
2095                 .put = snd_audigy2nx_led_put,
2096                 .private_value = 0,
2097         },
2098         {
2099                 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
2100                 .name = "Power LED Switch",
2101                 .info = snd_audigy2nx_led_info,
2102                 .get = snd_audigy2nx_led_get,
2103                 .put = snd_audigy2nx_led_put,
2104                 .private_value = 1,
2105         },
2106         {
2107                 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
2108                 .name = "Dolby Digital LED Switch",
2109                 .info = snd_audigy2nx_led_info,
2110                 .get = snd_audigy2nx_led_get,
2111                 .put = snd_audigy2nx_led_put,
2112                 .private_value = 2,
2113         },
2114 };
2115
2116 static int snd_audigy2nx_controls_create(struct usb_mixer_interface *mixer)
2117 {
2118         int i, err;
2119
2120         for (i = 0; i < ARRAY_SIZE(snd_audigy2nx_controls); ++i) {
2121                 if (i > 1 && /* Live24ext has 2 LEDs only */
2122                         (mixer->chip->usb_id == USB_ID(0x041e, 0x3040) ||
2123                          mixer->chip->usb_id == USB_ID(0x041e, 0x3048)))
2124                         break;
2125                 err = snd_ctl_add(mixer->chip->card,
2126                                   snd_ctl_new1(&snd_audigy2nx_controls[i], mixer));
2127                 if (err < 0)
2128                         return err;
2129         }
2130         mixer->audigy2nx_leds[1] = 1; /* Power LED is on by default */
2131         return 0;
2132 }
2133
2134 static void snd_audigy2nx_proc_read(struct snd_info_entry *entry,
2135                                     struct snd_info_buffer *buffer)
2136 {
2137         static const struct sb_jack {
2138                 int unitid;
2139                 const char *name;
2140         }  jacks_audigy2nx[] = {
2141                 {4,  "dig in "},
2142                 {7,  "line in"},
2143                 {19, "spk out"},
2144                 {20, "hph out"},
2145                 {-1, NULL}
2146         }, jacks_live24ext[] = {
2147                 {4,  "line in"}, /* &1=Line, &2=Mic*/
2148                 {3,  "hph out"}, /* headphones */
2149                 {0,  "RC     "}, /* last command, 6 bytes see rc_config above */
2150                 {-1, NULL}
2151         };
2152         const struct sb_jack *jacks;
2153         struct usb_mixer_interface *mixer = entry->private_data;
2154         int i, err;
2155         u8 buf[3];
2156
2157         snd_iprintf(buffer, "%s jacks\n\n", mixer->chip->card->shortname);
2158         if (mixer->chip->usb_id == USB_ID(0x041e, 0x3020))
2159                 jacks = jacks_audigy2nx;
2160         else if (mixer->chip->usb_id == USB_ID(0x041e, 0x3040) ||
2161                  mixer->chip->usb_id == USB_ID(0x041e, 0x3048))
2162                 jacks = jacks_live24ext;
2163         else
2164                 return;
2165
2166         for (i = 0; jacks[i].name; ++i) {
2167                 snd_iprintf(buffer, "%s: ", jacks[i].name);
2168                 err = snd_usb_ctl_msg(mixer->chip->dev,
2169                                       usb_rcvctrlpipe(mixer->chip->dev, 0),
2170                                       GET_MEM, USB_DIR_IN | USB_TYPE_CLASS |
2171                                       USB_RECIP_INTERFACE, 0,
2172                                       jacks[i].unitid << 8, buf, 3, 100);
2173                 if (err == 3 && (buf[0] == 3 || buf[0] == 6))
2174                         snd_iprintf(buffer, "%02x %02x\n", buf[1], buf[2]);
2175                 else
2176                         snd_iprintf(buffer, "?\n");
2177         }
2178 }
2179
2180 static int snd_xonar_u1_switch_get(struct snd_kcontrol *kcontrol,
2181                                    struct snd_ctl_elem_value *ucontrol)
2182 {
2183         struct usb_mixer_interface *mixer = snd_kcontrol_chip(kcontrol);
2184
2185         ucontrol->value.integer.value[0] = !!(mixer->xonar_u1_status & 0x02);
2186         return 0;
2187 }
2188
2189 static int snd_xonar_u1_switch_put(struct snd_kcontrol *kcontrol,
2190                                    struct snd_ctl_elem_value *ucontrol)
2191 {
2192         struct usb_mixer_interface *mixer = snd_kcontrol_chip(kcontrol);
2193         u8 old_status, new_status;
2194         int err, changed;
2195
2196         old_status = mixer->xonar_u1_status;
2197         if (ucontrol->value.integer.value[0])
2198                 new_status = old_status | 0x02;
2199         else
2200                 new_status = old_status & ~0x02;
2201         changed = new_status != old_status;
2202         err = snd_usb_ctl_msg(mixer->chip->dev,
2203                               usb_sndctrlpipe(mixer->chip->dev, 0), 0x08,
2204                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
2205                               50, 0, &new_status, 1, 100);
2206         if (err < 0)
2207                 return err;
2208         mixer->xonar_u1_status = new_status;
2209         return changed;
2210 }
2211
2212 static struct snd_kcontrol_new snd_xonar_u1_output_switch = {
2213         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
2214         .name = "Digital Playback Switch",
2215         .info = snd_ctl_boolean_mono_info,
2216         .get = snd_xonar_u1_switch_get,
2217         .put = snd_xonar_u1_switch_put,
2218 };
2219
2220 static int snd_xonar_u1_controls_create(struct usb_mixer_interface *mixer)
2221 {
2222         int err;
2223
2224         err = snd_ctl_add(mixer->chip->card,
2225                           snd_ctl_new1(&snd_xonar_u1_output_switch, mixer));
2226         if (err < 0)
2227                 return err;
2228         mixer->xonar_u1_status = 0x05;
2229         return 0;
2230 }
2231
2232 void snd_emuusb_set_samplerate(struct snd_usb_audio *chip,
2233                                unsigned char samplerate_id)
2234 {
2235         struct usb_mixer_interface *mixer;
2236         struct usb_mixer_elem_info *cval;
2237         int unitid = 12; /* SamleRate ExtensionUnit ID */
2238
2239         list_for_each_entry(mixer, &chip->mixer_list, list) {
2240                 cval = mixer->id_elems[unitid];
2241                 if (cval) {
2242                         set_cur_ctl_value(cval, cval->control << 8,
2243                                           samplerate_id);
2244                         snd_usb_mixer_notify_id(mixer, unitid);
2245                 }
2246                 break;
2247         }
2248 }
2249
2250 int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif,
2251                          int ignore_error)
2252 {
2253         static struct snd_device_ops dev_ops = {
2254                 .dev_free = snd_usb_mixer_dev_free
2255         };
2256         struct usb_mixer_interface *mixer;
2257         struct snd_info_entry *entry;
2258         int err;
2259
2260         strcpy(chip->card->mixername, "USB Mixer");
2261
2262         mixer = kzalloc(sizeof(*mixer), GFP_KERNEL);
2263         if (!mixer)
2264                 return -ENOMEM;
2265         mixer->chip = chip;
2266         mixer->ctrlif = ctrlif;
2267         mixer->ignore_ctl_error = ignore_error;
2268         mixer->id_elems = kcalloc(MAX_ID_ELEMS, sizeof(*mixer->id_elems),
2269                                   GFP_KERNEL);
2270         if (!mixer->id_elems) {
2271                 kfree(mixer);
2272                 return -ENOMEM;
2273         }
2274
2275         if ((err = snd_usb_mixer_controls(mixer)) < 0 ||
2276             (err = snd_usb_mixer_status_create(mixer)) < 0)
2277                 goto _error;
2278
2279         if ((err = snd_usb_soundblaster_remote_init(mixer)) < 0)
2280                 goto _error;
2281
2282         if (mixer->chip->usb_id == USB_ID(0x041e, 0x3020) ||
2283             mixer->chip->usb_id == USB_ID(0x041e, 0x3040) ||
2284             mixer->chip->usb_id == USB_ID(0x041e, 0x3048)) {
2285                 if ((err = snd_audigy2nx_controls_create(mixer)) < 0)
2286                         goto _error;
2287                 if (!snd_card_proc_new(chip->card, "audigy2nx", &entry))
2288                         snd_info_set_text_ops(entry, mixer,
2289                                               snd_audigy2nx_proc_read);
2290         }
2291
2292         if (mixer->chip->usb_id == USB_ID(0x0b05, 0x1739) ||
2293             mixer->chip->usb_id == USB_ID(0x0b05, 0x1743)) {
2294                 err = snd_xonar_u1_controls_create(mixer);
2295                 if (err < 0)
2296                         goto _error;
2297         }
2298
2299         err = snd_device_new(chip->card, SNDRV_DEV_LOWLEVEL, mixer, &dev_ops);
2300         if (err < 0)
2301                 goto _error;
2302
2303         if (list_empty(&chip->mixer_list) &&
2304             !snd_card_proc_new(chip->card, "usbmixer", &entry))
2305                 snd_info_set_text_ops(entry, chip, snd_usb_mixer_proc_read);
2306
2307         list_add(&mixer->list, &chip->mixer_list);
2308         return 0;
2309
2310 _error:
2311         snd_usb_mixer_free(mixer);
2312         return err;
2313 }
2314
2315 void snd_usb_mixer_disconnect(struct list_head *p)
2316 {
2317         struct usb_mixer_interface *mixer;
2318
2319         mixer = list_entry(p, struct usb_mixer_interface, list);
2320         usb_kill_urb(mixer->urb);
2321         usb_kill_urb(mixer->rc_urb);
2322 }