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 <linux/usb/audio.h>
  36
  37 #include <sound/core.h>
  38 #include <sound/control.h>
  39 #include <sound/hwdep.h>
  40 #include <sound/info.h>
  41 #include <sound/tlv.h>
  42
  43 #include "usbaudio.h"
  44
  45 /*
  46  */
  47
  48 /* ignore error from controls - for debugging */
  49 /* #define IGNORE_CTL_ERROR */
  50
  51 /*
  52  * Sound Blaster remote control configuration
  53  *
  54  * format of remote control data:
  55  * Extigy:       xx 00
  56  * Audigy 2 NX:  06 80 xx 00 00 00
  57  * Live! 24-bit: 06 80 xx yy 22 83
  58  */
  59 static const struct rc_config {
  60         u32 usb_id;
  61         u8  offset;
  62         u8  length;
  63         u8  packet_length;
  64         u8  min_packet_length; /* minimum accepted length of the URB result */
  65         u8  mute_mixer_id;
  66         u32 mute_code;
  67 } rc_configs[] = {
  68         { USB_ID(0x041e, 0x3000), 0, 1, 2, 1,  18, 0x0013 }, /* Extigy       */
  69         { USB_ID(0x041e, 0x3020), 2, 1, 6, 6,  18, 0x0013 }, /* Audigy 2 NX  */
  70         { USB_ID(0x041e, 0x3040), 2, 2, 6, 6,  2,  0x6e91 }, /* Live! 24-bit */
  71         { USB_ID(0x041e, 0x3048), 2, 2, 6, 6,  2,  0x6e91 }, /* Toshiba SB0500 */
  72 };
  73
  74 #define MAX_ID_ELEMS    256
  75
  76 struct usb_mixer_interface {
  77         struct snd_usb_audio *chip;
  78         unsigned int ctrlif;
  79         struct list_head list;
  80         unsigned int ignore_ctl_error;
  81         struct urb *urb;
  82         /* array[MAX_ID_ELEMS], indexed by unit id */
  83         struct usb_mixer_elem_info **id_elems;
  84
  85         /* Sound Blaster remote control stuff */
  86         const struct rc_config *rc_cfg;
  87         u32 rc_code;
  88         wait_queue_head_t rc_waitq;
  89         struct urb *rc_urb;
  90         struct usb_ctrlrequest *rc_setup_packet;
  91         u8 rc_buffer[6];
  92
  93         u8 audigy2nx_leds[3];
  94         u8 xonar_u1_status;
  95 };
  96
  97
  98 struct usb_audio_term {
  99         int id;
 100         int type;
 101         int channels;
 102         unsigned int chconfig;
 103         int name;
 104 };
 105
 106 struct usbmix_name_map;
 107
 108 struct mixer_build {
 109         struct snd_usb_audio *chip;
 110         struct usb_mixer_interface *mixer;
 111         unsigned char *buffer;
 112         unsigned int buflen;
 113         DECLARE_BITMAP(unitbitmap, MAX_ID_ELEMS);
 114         struct usb_audio_term oterm;
 115         const struct usbmix_name_map *map;
 116         const struct usbmix_selector_map *selector_map;
 117 };
 118
 119 #define MAX_CHANNELS    10      /* max logical channels */
 120
 121 struct usb_mixer_elem_info {
 122         struct usb_mixer_interface *mixer;
 123         struct usb_mixer_elem_info *next_id_elem; /* list of controls with same id */
 124         struct snd_ctl_elem_id *elem_id;
 125         unsigned int id;
 126         unsigned int control;   /* CS or ICN (high byte) */
 127         unsigned int cmask; /* channel mask bitmap: 0 = master */
 128         int channels;
 129         int val_type;
 130         int min, max, res;
 131         int dBmin, dBmax;
 132         int cached;
 133         int cache_val[MAX_CHANNELS];
 134         u8 initialized;
 135 };
 136
 137
 138 enum {
 139         USB_FEATURE_NONE = 0,
 140         USB_FEATURE_MUTE = 1,
 141         USB_FEATURE_VOLUME,
 142         USB_FEATURE_BASS,
 143         USB_FEATURE_MID,
 144         USB_FEATURE_TREBLE,
 145         USB_FEATURE_GEQ,
 146         USB_FEATURE_AGC,
 147         USB_FEATURE_DELAY,
 148         USB_FEATURE_BASSBOOST,
 149         USB_FEATURE_LOUDNESS
 150 };
 151
 152 enum {
 153         USB_MIXER_BOOLEAN,
 154         USB_MIXER_INV_BOOLEAN,
 155         USB_MIXER_S8,
 156         USB_MIXER_U8,
 157         USB_MIXER_S16,
 158         USB_MIXER_U16,
 159 };
 160
 161 enum {
 162         USB_PROC_UPDOWN = 1,
 163         USB_PROC_UPDOWN_SWITCH = 1,
 164         USB_PROC_UPDOWN_MODE_SEL = 2,
 165
 166         USB_PROC_PROLOGIC = 2,
 167         USB_PROC_PROLOGIC_SWITCH = 1,
 168         USB_PROC_PROLOGIC_MODE_SEL = 2,
 169
 170         USB_PROC_3DENH = 3,
 171         USB_PROC_3DENH_SWITCH = 1,
 172         USB_PROC_3DENH_SPACE = 2,
 173
 174         USB_PROC_REVERB = 4,
 175         USB_PROC_REVERB_SWITCH = 1,
 176         USB_PROC_REVERB_LEVEL = 2,
 177         USB_PROC_REVERB_TIME = 3,
 178         USB_PROC_REVERB_DELAY = 4,
 179
 180         USB_PROC_CHORUS = 5,
 181         USB_PROC_CHORUS_SWITCH = 1,
 182         USB_PROC_CHORUS_LEVEL = 2,
 183         USB_PROC_CHORUS_RATE = 3,
 184         USB_PROC_CHORUS_DEPTH = 4,
 185
 186         USB_PROC_DCR = 6,
 187         USB_PROC_DCR_SWITCH = 1,
 188         USB_PROC_DCR_RATIO = 2,
 189         USB_PROC_DCR_MAX_AMP = 3,
 190         USB_PROC_DCR_THRESHOLD = 4,
 191         USB_PROC_DCR_ATTACK = 5,
 192         USB_PROC_DCR_RELEASE = 6,
 193 };
 194
 195 /*E-mu 0202(0404) eXtension Unit(XU) control*/
 196 enum {
 197         USB_XU_CLOCK_RATE               = 0xe301,
 198         USB_XU_CLOCK_SOURCE             = 0xe302,
 199         USB_XU_DIGITAL_IO_STATUS        = 0xe303,
 200         USB_XU_DEVICE_OPTIONS           = 0xe304,
 201         USB_XU_DIRECT_MONITORING        = 0xe305,
 202         USB_XU_METERING                 = 0xe306
 203 };
 204 enum {
 205         USB_XU_CLOCK_SOURCE_SELECTOR = 0x02,    /* clock source*/
 206         USB_XU_CLOCK_RATE_SELECTOR = 0x03,      /* clock rate */
 207         USB_XU_DIGITAL_FORMAT_SELECTOR = 0x01,  /* the spdif format */
 208         USB_XU_SOFT_LIMIT_SELECTOR = 0x03       /* soft limiter */
 209 };
 210
 211 /*
 212  * manual mapping of mixer names
 213  * if the mixer topology is too complicated and the parsed names are
 214  * ambiguous, add the entries in usbmixer_maps.c.
 215  */
 216 #include "usbmixer_maps.c"
 217
 218 static const struct usbmix_name_map *
 219 find_map(struct mixer_build *state, int unitid, int control)
 220 {
 221         const struct usbmix_name_map *p = state->map;
 222
 223         if (!p)
 224                 return NULL;
 225
 226         for (p = state->map; p->id; p++) {
 227                 if (p->id == unitid &&
 228                     (!control || !p->control || control == p->control))
 229                         return p;
 230         }
 231         return NULL;
 232 }
 233
 234 /* get the mapped name if the unit matches */
 235 static int
 236 check_mapped_name(const struct usbmix_name_map *p, char *buf, int buflen)
 237 {
 238         if (!p || !p->name)
 239                 return 0;
 240
 241         buflen--;
 242         return strlcpy(buf, p->name, buflen);
 243 }
 244
 245 /* check whether the control should be ignored */
 246 static inline int
 247 check_ignored_ctl(const struct usbmix_name_map *p)
 248 {
 249         if (!p || p->name || p->dB)
 250                 return 0;
 251         return 1;
 252 }
 253
 254 /* dB mapping */
 255 static inline void check_mapped_dB(const struct usbmix_name_map *p,
 256                                    struct usb_mixer_elem_info *cval)
 257 {
 258         if (p && p->dB) {
 259                 cval->dBmin = p->dB->min;
 260                 cval->dBmax = p->dB->max;
 261         }
 262 }
 263
 264 /* get the mapped selector source name */
 265 static int check_mapped_selector_name(struct mixer_build *state, int unitid,
 266                                       int index, char *buf, int buflen)
 267 {
 268         const struct usbmix_selector_map *p;
 269
 270         if (! state->selector_map)
 271                 return 0;
 272         for (p = state->selector_map; p->id; p++) {
 273                 if (p->id == unitid && index < p->count)
 274                         return strlcpy(buf, p->names[index], buflen);
 275         }
 276         return 0;
 277 }
 278
 279 /*
 280  * find an audio control unit with the given unit id
 281  */
 282 static void *find_audio_control_unit(struct mixer_build *state, unsigned char unit)
 283 {
 284         unsigned char *p;
 285
 286         p = NULL;
 287         while ((p = snd_usb_find_desc(state->buffer, state->buflen, p,
 288                                       USB_DT_CS_INTERFACE)) != NULL) {
 289                 if (p[0] >= 4 && p[2] >= UAC_INPUT_TERMINAL && p[2] <= UAC_EXTENSION_UNIT_V1 && p[3] == unit)
 290                         return p;
 291         }
 292         return NULL;
 293 }
 294
 295
 296 /*
 297  * copy a string with the given id
 298  */
 299 static int snd_usb_copy_string_desc(struct mixer_build *state, int index, char *buf, int maxlen)
 300 {
 301         int len = usb_string(state->chip->dev, index, buf, maxlen - 1);
 302         buf[len] = 0;
 303         return len;
 304 }
 305
 306 /*
 307  * convert from the byte/word on usb descriptor to the zero-based integer
 308  */
 309 static int convert_signed_value(struct usb_mixer_elem_info *cval, int val)
 310 {
 311         switch (cval->val_type) {
 312         case USB_MIXER_BOOLEAN:
 313                 return !!val;
 314         case USB_MIXER_INV_BOOLEAN:
 315                 return !val;
 316         case USB_MIXER_U8:
 317                 val &= 0xff;
 318                 break;
 319         case USB_MIXER_S8:
 320                 val &= 0xff;
 321                 if (val >= 0x80)
 322                         val -= 0x100;
 323                 break;
 324         case USB_MIXER_U16:
 325                 val &= 0xffff;
 326                 break;
 327         case USB_MIXER_S16:
 328                 val &= 0xffff;
 329                 if (val >= 0x8000)
 330                         val -= 0x10000;
 331                 break;
 332         }
 333         return val;
 334 }
 335
 336 /*
 337  * convert from the zero-based int to the byte/word for usb descriptor
 338  */
 339 static int convert_bytes_value(struct usb_mixer_elem_info *cval, int val)
 340 {
 341         switch (cval->val_type) {
 342         case USB_MIXER_BOOLEAN:
 343                 return !!val;
 344         case USB_MIXER_INV_BOOLEAN:
 345                 return !val;
 346         case USB_MIXER_S8:
 347         case USB_MIXER_U8:
 348                 return val & 0xff;
 349         case USB_MIXER_S16:
 350         case USB_MIXER_U16:
 351                 return val & 0xffff;
 352         }
 353         return 0; /* not reached */
 354 }
 355
 356 static int get_relative_value(struct usb_mixer_elem_info *cval, int val)
 357 {
 358         if (! cval->res)
 359                 cval->res = 1;
 360         if (val < cval->min)
 361                 return 0;
 362         else if (val >= cval->max)
 363                 return (cval->max - cval->min + cval->res - 1) / cval->res;
 364         else
 365                 return (val - cval->min) / cval->res;
 366 }
 367
 368 static int get_abs_value(struct usb_mixer_elem_info *cval, int val)
 369 {
 370         if (val < 0)
 371                 return cval->min;
 372         if (! cval->res)
 373                 cval->res = 1;
 374         val *= cval->res;
 375         val += cval->min;
 376         if (val > cval->max)
 377                 return cval->max;
 378         return val;
 379 }
 380
 381
 382 /*
 383  * retrieve a mixer value
 384  */
 385
 386 static int get_ctl_value(struct usb_mixer_elem_info *cval, int request, int validx, int *value_ret)
 387 {
 388         unsigned char buf[2];
 389         int val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1;
 390         int timeout = 10;
 391
 392         while (timeout-- > 0) {
 393                 if (snd_usb_ctl_msg(cval->mixer->chip->dev,
 394                                     usb_rcvctrlpipe(cval->mixer->chip->dev, 0),
 395                                     request,
 396                                     USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
 397                                     validx, cval->mixer->ctrlif | (cval->id << 8),
 398                                     buf, val_len, 100) >= val_len) {
 399                         *value_ret = convert_signed_value(cval, snd_usb_combine_bytes(buf, val_len));
 400                         return 0;
 401                 }
 402         }
 403         snd_printdd(KERN_ERR "cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n",
 404                     request, validx, cval->mixer->ctrlif | (cval->id << 8), cval->val_type);
 405         return -EINVAL;
 406 }
 407
 408 static int get_cur_ctl_value(struct usb_mixer_elem_info *cval, int validx, int *value)
 409 {
 410         return get_ctl_value(cval, UAC_GET_CUR, validx, value);
 411 }
 412
 413 /* channel = 0: master, 1 = first channel */
 414 static inline int get_cur_mix_raw(struct usb_mixer_elem_info *cval,
 415                                   int channel, int *value)
 416 {
 417         return get_ctl_value(cval, UAC_GET_CUR, (cval->control << 8) | channel, value);
 418 }
 419
 420 static int get_cur_mix_value(struct usb_mixer_elem_info *cval,
 421                              int channel, int index, int *value)
 422 {
 423         int err;
 424
 425         if (cval->cached & (1 << channel)) {
 426                 *value = cval->cache_val[index];
 427                 return 0;
 428         }
 429         err = get_cur_mix_raw(cval, channel, value);
 430         if (err < 0) {
 431                 if (!cval->mixer->ignore_ctl_error)
 432                         snd_printd(KERN_ERR "cannot get current value for "
 433                                    "control %d ch %d: err = %d\n",
 434                                    cval->control, channel, err);
 435                 return err;
 436         }
 437         cval->cached |= 1 << channel;
 438         cval->cache_val[index] = *value;
 439         return 0;
 440 }
 441
 442
 443 /*
 444  * set a mixer value
 445  */
 446
 447 static int set_ctl_value(struct usb_mixer_elem_info *cval, int request, int validx, int value_set)
 448 {
 449         unsigned char buf[2];
 450         int val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1;
 451         int timeout = 10;
 452
 453         value_set = convert_bytes_value(cval, value_set);
 454         buf[0] = value_set & 0xff;
 455         buf[1] = (value_set >> 8) & 0xff;
 456         while (timeout-- > 0)
 457                 if (snd_usb_ctl_msg(cval->mixer->chip->dev,
 458                                     usb_sndctrlpipe(cval->mixer->chip->dev, 0),
 459                                     request,
 460                                     USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
 461                                     validx, cval->mixer->ctrlif | (cval->id << 8),
 462                                     buf, val_len, 100) >= 0)
 463                         return 0;
 464         snd_printdd(KERN_ERR "cannot set ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d, data = %#x/%#x\n",
 465                     request, validx, cval->mixer->ctrlif | (cval->id << 8), cval->val_type, buf[0], buf[1]);
 466         return -EINVAL;
 467 }
 468
 469 static int set_cur_ctl_value(struct usb_mixer_elem_info *cval, int validx, int value)
 470 {
 471         return set_ctl_value(cval, UAC_SET_CUR, validx, value);
 472 }
 473
 474 static int set_cur_mix_value(struct usb_mixer_elem_info *cval, int channel,
 475                              int index, int value)
 476 {
 477         int err;
 478         err = set_ctl_value(cval, UAC_SET_CUR, (cval->control << 8) | channel,
 479                             value);
 480         if (err < 0)
 481                 return err;
 482         cval->cached |= 1 << channel;
 483         cval->cache_val[index] = value;
 484         return 0;
 485 }
 486
 487 /*
 488  * TLV callback for mixer volume controls
 489  */
 490 static int mixer_vol_tlv(struct snd_kcontrol *kcontrol, int op_flag,
 491                          unsigned int size, unsigned int __user *_tlv)
 492 {
 493         struct usb_mixer_elem_info *cval = kcontrol->private_data;
 494         DECLARE_TLV_DB_MINMAX(scale, 0, 0);
 495
 496         if (size < sizeof(scale))
 497                 return -ENOMEM;
 498         scale[2] = cval->dBmin;
 499         scale[3] = cval->dBmax;
 500         if (copy_to_user(_tlv, scale, sizeof(scale)))
 501                 return -EFAULT;
 502         return 0;
 503 }
 504
 505 /*
 506  * parser routines begin here...
 507  */
 508
 509 static int parse_audio_unit(struct mixer_build *state, int unitid);
 510
 511
 512 /*
 513  * check if the input/output channel routing is enabled on the given bitmap.
 514  * used for mixer unit parser
 515  */
 516 static int check_matrix_bitmap(unsigned char *bmap, int ich, int och, int num_outs)
 517 {
 518         int idx = ich * num_outs + och;
 519         return bmap[idx >> 3] & (0x80 >> (idx & 7));
 520 }
 521
 522
 523 /*
 524  * add an alsa control element
 525  * search and increment the index until an empty slot is found.
 526  *
 527  * if failed, give up and free the control instance.
 528  */
 529
 530 static int add_control_to_empty(struct mixer_build *state, struct snd_kcontrol *kctl)
 531 {
 532         struct usb_mixer_elem_info *cval = kctl->private_data;
 533         int err;
 534
 535         while (snd_ctl_find_id(state->chip->card, &kctl->id))
 536                 kctl->id.index++;
 537         if ((err = snd_ctl_add(state->chip->card, kctl)) < 0) {
 538                 snd_printd(KERN_ERR "cannot add control (err = %d)\n", err);
 539                 return err;
 540         }
 541         cval->elem_id = &kctl->id;
 542         cval->next_id_elem = state->mixer->id_elems[cval->id];
 543         state->mixer->id_elems[cval->id] = cval;
 544         return 0;
 545 }
 546
 547
 548 /*
 549  * get a terminal name string
 550  */
 551
 552 static struct iterm_name_combo {
 553         int type;
 554         char *name;
 555 } iterm_names[] = {
 556         { 0x0300, "Output" },
 557         { 0x0301, "Speaker" },
 558         { 0x0302, "Headphone" },
 559         { 0x0303, "HMD Audio" },
 560         { 0x0304, "Desktop Speaker" },
 561         { 0x0305, "Room Speaker" },
 562         { 0x0306, "Com Speaker" },
 563         { 0x0307, "LFE" },
 564         { 0x0600, "External In" },
 565         { 0x0601, "Analog In" },
 566         { 0x0602, "Digital In" },
 567         { 0x0603, "Line" },
 568         { 0x0604, "Legacy In" },
 569         { 0x0605, "IEC958 In" },
 570         { 0x0606, "1394 DA Stream" },
 571         { 0x0607, "1394 DV Stream" },
 572         { 0x0700, "Embedded" },
 573         { 0x0701, "Noise Source" },
 574         { 0x0702, "Equalization Noise" },
 575         { 0x0703, "CD" },
 576         { 0x0704, "DAT" },
 577         { 0x0705, "DCC" },
 578         { 0x0706, "MiniDisk" },
 579         { 0x0707, "Analog Tape" },
 580         { 0x0708, "Phonograph" },
 581         { 0x0709, "VCR Audio" },
 582         { 0x070a, "Video Disk Audio" },
 583         { 0x070b, "DVD Audio" },
 584         { 0x070c, "TV Tuner Audio" },
 585         { 0x070d, "Satellite Rec Audio" },
 586         { 0x070e, "Cable Tuner Audio" },
 587         { 0x070f, "DSS Audio" },
 588         { 0x0710, "Radio Receiver" },
 589         { 0x0711, "Radio Transmitter" },
 590         { 0x0712, "Multi-Track Recorder" },
 591         { 0x0713, "Synthesizer" },
 592         { 0 },
 593 };
 594
 595 static int get_term_name(struct mixer_build *state, struct usb_audio_term *iterm,
 596                          unsigned char *name, int maxlen, int term_only)
 597 {
 598         struct iterm_name_combo *names;
 599
 600         if (iterm->name)
 601                 return snd_usb_copy_string_desc(state, iterm->name, name, maxlen);
 602
 603         /* virtual type - not a real terminal */
 604         if (iterm->type >> 16) {
 605                 if (term_only)
 606                         return 0;
 607                 switch (iterm->type >> 16) {
 608                 case UAC_SELECTOR_UNIT:
 609                         strcpy(name, "Selector"); return 8;
 610                 case UAC_PROCESSING_UNIT_V1:
 611                         strcpy(name, "Process Unit"); return 12;
 612                 case UAC_EXTENSION_UNIT_V1:
 613                         strcpy(name, "Ext Unit"); return 8;
 614                 case UAC_MIXER_UNIT:
 615                         strcpy(name, "Mixer"); return 5;
 616                 default:
 617                         return sprintf(name, "Unit %d", iterm->id);
 618                 }
 619         }
 620
 621         switch (iterm->type & 0xff00) {
 622         case 0x0100:
 623                 strcpy(name, "PCM"); return 3;
 624         case 0x0200:
 625                 strcpy(name, "Mic"); return 3;
 626         case 0x0400:
 627                 strcpy(name, "Headset"); return 7;
 628         case 0x0500:
 629                 strcpy(name, "Phone"); return 5;
 630         }
 631
 632         for (names = iterm_names; names->type; names++)
 633                 if (names->type == iterm->type) {
 634                         strcpy(name, names->name);
 635                         return strlen(names->name);
 636                 }
 637         return 0;
 638 }
 639
 640
 641 /*
 642  * parse the source unit recursively until it reaches to a terminal
 643  * or a branched unit.
 644  */
 645 static int check_input_term(struct mixer_build *state, int id, struct usb_audio_term *term)
 646 {
 647         unsigned char *p1;
 648
 649         memset(term, 0, sizeof(*term));
 650         while ((p1 = find_audio_control_unit(state, id)) != NULL) {
 651                 term->id = id;
 652                 switch (p1[2]) {
 653                 case UAC_INPUT_TERMINAL:
 654                         term->type = combine_word(p1 + 4);
 655                         term->channels = p1[7];
 656                         term->chconfig = combine_word(p1 + 8);
 657                         term->name = p1[11];
 658                         return 0;
 659                 case UAC_FEATURE_UNIT:
 660                         id = p1[4];
 661                         break; /* continue to parse */
 662                 case UAC_MIXER_UNIT:
 663                         term->type = p1[2] << 16; /* virtual type */
 664                         term->channels = p1[5 + p1[4]];
 665                         term->chconfig = combine_word(p1 + 6 + p1[4]);
 666                         term->name = p1[p1[0] - 1];
 667                         return 0;
 668                 case UAC_SELECTOR_UNIT:
 669                         /* call recursively to retrieve the channel info */
 670                         if (check_input_term(state, p1[5], term) < 0)
 671                                 return -ENODEV;
 672                         term->type = p1[2] << 16; /* virtual type */
 673                         term->id = id;
 674                         term->name = p1[9 + p1[0] - 1];
 675                         return 0;
 676                 case UAC_PROCESSING_UNIT_V1:
 677                 case UAC_EXTENSION_UNIT_V1:
 678                         if (p1[6] == 1) {
 679                                 id = p1[7];
 680                                 break; /* continue to parse */
 681                         }
 682                         term->type = p1[2] << 16; /* virtual type */
 683                         term->channels = p1[7 + p1[6]];
 684                         term->chconfig = combine_word(p1 + 8 + p1[6]);
 685                         term->name = p1[12 + p1[6] + p1[11 + p1[6]]];
 686                         return 0;
 687                 default:
 688                         return -ENODEV;
 689                 }
 690         }
 691         return -ENODEV;
 692 }
 693
 694
 695 /*
 696  * Feature Unit
 697  */
 698
 699 /* feature unit control information */
 700 struct usb_feature_control_info {
 701         const char *name;
 702         unsigned int type;      /* control type (mute, volume, etc.) */
 703 };
 704
 705 static struct usb_feature_control_info audio_feature_info[] = {
 706         { "Mute",               USB_MIXER_INV_BOOLEAN },
 707         { "Volume",             USB_MIXER_S16 },
 708         { "Tone Control - Bass",        USB_MIXER_S8 },
 709         { "Tone Control - Mid",         USB_MIXER_S8 },
 710         { "Tone Control - Treble",      USB_MIXER_S8 },
 711         { "Graphic Equalizer",          USB_MIXER_S8 }, /* FIXME: not implemeted yet */
 712         { "Auto Gain Control",  USB_MIXER_BOOLEAN },
 713         { "Delay Control",      USB_MIXER_U16 },
 714         { "Bass Boost",         USB_MIXER_BOOLEAN },
 715         { "Loudness",           USB_MIXER_BOOLEAN },
 716 };
 717
 718
 719 /* private_free callback */
 720 static void usb_mixer_elem_free(struct snd_kcontrol *kctl)
 721 {
 722         kfree(kctl->private_data);
 723         kctl->private_data = NULL;
 724 }
 725
 726
 727 /*
 728  * interface to ALSA control for feature/mixer units
 729  */
 730
 731 /*
 732  * retrieve the minimum and maximum values for the specified control
 733  */
 734 static int get_min_max(struct usb_mixer_elem_info *cval, int default_min)
 735 {
 736         /* for failsafe */
 737         cval->min = default_min;
 738         cval->max = cval->min + 1;
 739         cval->res = 1;
 740         cval->dBmin = cval->dBmax = 0;
 741
 742         if (cval->val_type == USB_MIXER_BOOLEAN ||
 743             cval->val_type == USB_MIXER_INV_BOOLEAN) {
 744                 cval->initialized = 1;
 745         } else {
 746                 int minchn = 0;
 747                 if (cval->cmask) {
 748                         int i;
 749                         for (i = 0; i < MAX_CHANNELS; i++)
 750                                 if (cval->cmask & (1 << i)) {
 751                                         minchn = i + 1;
 752                                         break;
 753                                 }
 754                 }
 755                 if (get_ctl_value(cval, UAC_GET_MAX, (cval->control << 8) | minchn, &cval->max) < 0 ||
 756                     get_ctl_value(cval, UAC_GET_MIN, (cval->control << 8) | minchn, &cval->min) < 0) {
 757                         snd_printd(KERN_ERR "%d:%d: cannot get min/max values for control %d (id %d)\n",
 758                                    cval->id, cval->mixer->ctrlif, cval->control, cval->id);
 759                         return -EINVAL;
 760                 }
 761                 if (get_ctl_value(cval, UAC_GET_RES, (cval->control << 8) | minchn, &cval->res) < 0) {
 762                         cval->res = 1;
 763                 } else {
 764                         int last_valid_res = cval->res;
 765
 766                         while (cval->res > 1) {
 767                                 if (set_ctl_value(cval, UAC_SET_RES, (cval->control << 8) | minchn, cval->res / 2) < 0)
 768                                         break;
 769                                 cval->res /= 2;
 770                         }
 771                         if (get_ctl_value(cval, UAC_GET_RES, (cval->control << 8) | minchn, &cval->res) < 0)
 772                                 cval->res = last_valid_res;
 773                 }
 774                 if (cval->res == 0)
 775                         cval->res = 1;
 776
 777                 /* Additional checks for the proper resolution
 778                  *
 779                  * Some devices report smaller resolutions than actually
 780                  * reacting.  They don't return errors but simply clip
 781                  * to the lower aligned value.
 782                  */
 783                 if (cval->min + cval->res < cval->max) {
 784                         int last_valid_res = cval->res;
 785                         int saved, test, check;
 786                         get_cur_mix_raw(cval, minchn, &saved);
 787                         for (;;) {
 788                                 test = saved;
 789                                 if (test < cval->max)
 790                                         test += cval->res;
 791                                 else
 792                                         test -= cval->res;
 793                                 if (test < cval->min || test > cval->max ||
 794                                     set_cur_mix_value(cval, minchn, 0, test) ||
 795                                     get_cur_mix_raw(cval, minchn, &check)) {
 796                                         cval->res = last_valid_res;
 797                                         break;
 798                                 }
 799                                 if (test == check)
 800                                         break;
 801                                 cval->res *= 2;
 802                         }
 803                         set_cur_mix_value(cval, minchn, 0, saved);
 804                 }
 805
 806                 cval->initialized = 1;
 807         }
 808
 809         /* USB descriptions contain the dB scale in 1/256 dB unit
 810          * while ALSA TLV contains in 1/100 dB unit
 811          */
 812         cval->dBmin = (convert_signed_value(cval, cval->min) * 100) / 256;
 813         cval->dBmax = (convert_signed_value(cval, cval->max) * 100) / 256;
 814         if (cval->dBmin > cval->dBmax) {
 815                 /* something is wrong; assume it's either from/to 0dB */
 816                 if (cval->dBmin < 0)
 817                         cval->dBmax = 0;
 818                 else if (cval->dBmin > 0)
 819                         cval->dBmin = 0;
 820                 if (cval->dBmin > cval->dBmax) {
 821                         /* totally crap, return an error */
 822                         return -EINVAL;
 823                 }
 824         }
 825
 826         return 0;
 827 }
 828
 829
 830 /* get a feature/mixer unit info */
 831 static int mixer_ctl_feature_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 832 {
 833         struct usb_mixer_elem_info *cval = kcontrol->private_data;
 834
 835         if (cval->val_type == USB_MIXER_BOOLEAN ||
 836             cval->val_type == USB_MIXER_INV_BOOLEAN)
 837                 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
 838         else
 839                 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 840         uinfo->count = cval->channels;
 841         if (cval->val_type == USB_MIXER_BOOLEAN ||
 842             cval->val_type == USB_MIXER_INV_BOOLEAN) {
 843                 uinfo->value.integer.min = 0;
 844                 uinfo->value.integer.max = 1;
 845         } else {
 846                 if (! cval->initialized)
 847                         get_min_max(cval,  0);
 848                 uinfo->value.integer.min = 0;
 849                 uinfo->value.integer.max =
 850                         (cval->max - cval->min + cval->res - 1) / cval->res;
 851         }
 852         return 0;
 853 }
 854
 855 /* get the current value from feature/mixer unit */
 856 static int mixer_ctl_feature_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
 857 {
 858         struct usb_mixer_elem_info *cval = kcontrol->private_data;
 859         int c, cnt, val, err;
 860
 861         ucontrol->value.integer.value[0] = cval->min;
 862         if (cval->cmask) {
 863                 cnt = 0;
 864                 for (c = 0; c < MAX_CHANNELS; c++) {
 865                         if (!(cval->cmask & (1 << c)))
 866                                 continue;
 867                         err = get_cur_mix_value(cval, c + 1, cnt, &val);
 868                         if (err < 0)
 869                                 return cval->mixer->ignore_ctl_error ? 0 : err;
 870                         val = get_relative_value(cval, val);
 871                         ucontrol->value.integer.value[cnt] = val;
 872                         cnt++;
 873                 }
 874                 return 0;
 875         } else {
 876                 /* master channel */
 877                 err = get_cur_mix_value(cval, 0, 0, &val);
 878                 if (err < 0)
 879                         return cval->mixer->ignore_ctl_error ? 0 : err;
 880                 val = get_relative_value(cval, val);
 881                 ucontrol->value.integer.value[0] = val;
 882         }
 883         return 0;
 884 }
 885
 886 /* put the current value to feature/mixer unit */
 887 static int mixer_ctl_feature_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
 888 {
 889         struct usb_mixer_elem_info *cval = kcontrol->private_data;
 890         int c, cnt, val, oval, err;
 891         int changed = 0;
 892
 893         if (cval->cmask) {
 894                 cnt = 0;
 895                 for (c = 0; c < MAX_CHANNELS; c++) {
 896                         if (!(cval->cmask & (1 << c)))
 897                                 continue;
 898                         err = get_cur_mix_value(cval, c + 1, cnt, &oval);
 899                         if (err < 0)
 900                                 return cval->mixer->ignore_ctl_error ? 0 : err;
 901                         val = ucontrol->value.integer.value[cnt];
 902                         val = get_abs_value(cval, val);
 903                         if (oval != val) {
 904                                 set_cur_mix_value(cval, c + 1, cnt, val);
 905                                 changed = 1;
 906                         }
 907                         cnt++;
 908                 }
 909         } else {
 910                 /* master channel */
 911                 err = get_cur_mix_value(cval, 0, 0, &oval);
 912                 if (err < 0)
 913                         return cval->mixer->ignore_ctl_error ? 0 : err;
 914                 val = ucontrol->value.integer.value[0];
 915                 val = get_abs_value(cval, val);
 916                 if (val != oval) {
 917                         set_cur_mix_value(cval, 0, 0, val);
 918                         changed = 1;
 919                 }
 920         }
 921         return changed;
 922 }
 923
 924 static struct snd_kcontrol_new usb_feature_unit_ctl = {
 925         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 926         .name = "", /* will be filled later manually */
 927         .info = mixer_ctl_feature_info,
 928         .get = mixer_ctl_feature_get,
 929         .put = mixer_ctl_feature_put,
 930 };
 931
 932
 933 /*
 934  * build a feature control
 935  */
 936
 937 static size_t append_ctl_name(struct snd_kcontrol *kctl, const char *str)
 938 {
 939         return strlcat(kctl->id.name, str, sizeof(kctl->id.name));
 940 }
 941
 942 static void build_feature_ctl(struct mixer_build *state, unsigned char *desc,
 943                               unsigned int ctl_mask, int control,
 944                               struct usb_audio_term *iterm, int unitid)
 945 {
 946         unsigned int len = 0;
 947         int mapped_name = 0;
 948         int nameid = desc[desc[0] - 1];
 949         struct snd_kcontrol *kctl;
 950         struct usb_mixer_elem_info *cval;
 951         const struct usbmix_name_map *map;
 952
 953         control++; /* change from zero-based to 1-based value */
 954
 955         if (control == USB_FEATURE_GEQ) {
 956                 /* FIXME: not supported yet */
 957                 return;
 958         }
 959
 960         map = find_map(state, unitid, control);
 961         if (check_ignored_ctl(map))
 962                 return;
 963
 964         cval = kzalloc(sizeof(*cval), GFP_KERNEL);
 965         if (! cval) {
 966                 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
 967                 return;
 968         }
 969         cval->mixer = state->mixer;
 970         cval->id = unitid;
 971         cval->control = control;
 972         cval->cmask = ctl_mask;
 973         cval->val_type = audio_feature_info[control-1].type;
 974         if (ctl_mask == 0)
 975                 cval->channels = 1;     /* master channel */
 976         else {
 977                 int i, c = 0;
 978                 for (i = 0; i < 16; i++)
 979                         if (ctl_mask & (1 << i))
 980                                 c++;
 981                 cval->channels = c;
 982         }
 983
 984         /* get min/max values */
 985         get_min_max(cval, 0);
 986
 987         kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval);
 988         if (! kctl) {
 989                 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
 990                 kfree(cval);
 991                 return;
 992         }
 993         kctl->private_free = usb_mixer_elem_free;
 994
 995         len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name));
 996         mapped_name = len != 0;
 997         if (! len && nameid)
 998                 len = snd_usb_copy_string_desc(state, nameid,
 999                                 kctl->id.name, sizeof(kctl->id.name));
1000
1001         switch (control) {
1002         case USB_FEATURE_MUTE:
1003         case USB_FEATURE_VOLUME:
1004                 /* determine the control name.  the rule is:
1005                  * - if a name id is given in descriptor, use it.
1006                  * - if the connected input can be determined, then use the name
1007                  *   of terminal type.
1008                  * - if the connected output can be determined, use it.
1009                  * - otherwise, anonymous name.
1010                  */
1011                 if (! len) {
1012                         len = get_term_name(state, iterm, kctl->id.name, sizeof(kctl->id.name), 1);
1013                         if (! len)
1014                                 len = get_term_name(state, &state->oterm, kctl->id.name, sizeof(kctl->id.name), 1);
1015                         if (! len)
1016                                 len = snprintf(kctl->id.name, sizeof(kctl->id.name),
1017                                                "Feature %d", unitid);
1018                 }
1019                 /* determine the stream direction:
1020                  * if the connected output is USB stream, then it's likely a
1021                  * capture stream.  otherwise it should be playback (hopefully :)
1022                  */
1023                 if (! mapped_name && ! (state->oterm.type >> 16)) {
1024                         if ((state->oterm.type & 0xff00) == 0x0100) {
1025                                 len = append_ctl_name(kctl, " Capture");
1026                         } else {
1027                                 len = append_ctl_name(kctl, " Playback");
1028                         }
1029                 }
1030                 append_ctl_name(kctl, control == USB_FEATURE_MUTE ?
1031                                 " Switch" : " Volume");
1032                 if (control == USB_FEATURE_VOLUME) {
1033                         kctl->tlv.c = mixer_vol_tlv;
1034                         kctl->vd[0].access |=
1035                                 SNDRV_CTL_ELEM_ACCESS_TLV_READ |
1036                                 SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK;
1037                         check_mapped_dB(map, cval);
1038                 }
1039                 break;
1040
1041         default:
1042                 if (! len)
1043                         strlcpy(kctl->id.name, audio_feature_info[control-1].name,
1044                                 sizeof(kctl->id.name));
1045                 break;
1046         }
1047
1048         /* volume control quirks */
1049         switch (state->chip->usb_id) {
1050         case USB_ID(0x0471, 0x0101):
1051         case USB_ID(0x0471, 0x0104):
1052         case USB_ID(0x0471, 0x0105):
1053         case USB_ID(0x0672, 0x1041):
1054         /* quirk for UDA1321/N101.
1055          * note that detection between firmware 2.1.1.7 (N101)
1056          * and later 2.1.1.21 is not very clear from datasheets.
1057          * I hope that the min value is -15360 for newer firmware --jk
1058          */
1059                 if (!strcmp(kctl->id.name, "PCM Playback Volume") &&
1060                     cval->min == -15616) {
1061                         snd_printk(KERN_INFO
1062                                  "set volume quirk for UDA1321/N101 chip\n");
1063                         cval->max = -256;
1064                 }
1065                 break;
1066
1067         case USB_ID(0x046d, 0x09a4):
1068                 if (!strcmp(kctl->id.name, "Mic Capture Volume")) {
1069                         snd_printk(KERN_INFO
1070                                 "set volume quirk for QuickCam E3500\n");
1071                         cval->min = 6080;
1072                         cval->max = 8768;
1073                         cval->res = 192;
1074                 }
1075                 break;
1076
1077         }
1078
1079         snd_printdd(KERN_INFO "[%d] FU [%s] ch = %d, val = %d/%d/%d\n",
1080                     cval->id, kctl->id.name, cval->channels, cval->min, cval->max, cval->res);
1081         add_control_to_empty(state, kctl);
1082 }
1083
1084
1085
1086 /*
1087  * parse a feature unit
1088  *
1089  * most of controlls are defined here.
1090  */
1091 static int parse_audio_feature_unit(struct mixer_build *state, int unitid, void *_ftr)
1092 {
1093         int channels, i, j;
1094         struct usb_audio_term iterm;
1095         unsigned int master_bits, first_ch_bits;
1096         int err, csize;
1097         struct uac_feature_unit_descriptor *ftr = _ftr;
1098
1099         if (ftr->bLength < 7 || ! (csize = ftr->bControlSize) || ftr->bLength < 7 + csize) {
1100                 snd_printk(KERN_ERR "usbaudio: unit %u: invalid UAC_FEATURE_UNIT descriptor\n", unitid);
1101                 return -EINVAL;
1102         }
1103
1104         /* parse the source unit */
1105         if ((err = parse_audio_unit(state, ftr->bSourceID)) < 0)
1106                 return err;
1107
1108         /* determine the input source type and name */
1109         if (check_input_term(state, ftr->bSourceID, &iterm) < 0)
1110                 return -EINVAL;
1111
1112         channels = (ftr->bLength - 7) / csize - 1;
1113
1114         master_bits = snd_usb_combine_bytes(ftr->controls, csize);
1115         /* master configuration quirks */
1116         switch (state->chip->usb_id) {
1117         case USB_ID(0x08bb, 0x2702):
1118                 snd_printk(KERN_INFO
1119                            "usbmixer: master volume quirk for PCM2702 chip\n");
1120                 /* disable non-functional volume control */
1121                 master_bits &= ~(1 << (USB_FEATURE_VOLUME - 1));
1122                 break;
1123         }
1124         if (channels > 0)
1125                 first_ch_bits = snd_usb_combine_bytes(ftr->controls + csize, csize);
1126         else
1127                 first_ch_bits = 0;
1128         /* check all control types */
1129         for (i = 0; i < 10; i++) {
1130                 unsigned int ch_bits = 0;
1131                 for (j = 0; j < channels; j++) {
1132                         unsigned int mask = snd_usb_combine_bytes(ftr->controls + csize * (j+1), csize);
1133                         if (mask & (1 << i))
1134                                 ch_bits |= (1 << j);
1135                 }
1136                 if (ch_bits & 1) /* the first channel must be set (for ease of programming) */
1137                         build_feature_ctl(state, _ftr, ch_bits, i, &iterm, unitid);
1138                 if (master_bits & (1 << i))
1139                         build_feature_ctl(state, _ftr, 0, i, &iterm, unitid);
1140         }
1141
1142         return 0;
1143 }
1144
1145
1146 /*
1147  * Mixer Unit
1148  */
1149
1150 /*
1151  * build a mixer unit control
1152  *
1153  * the callbacks are identical with feature unit.
1154  * input channel number (zero based) is given in control field instead.
1155  */
1156
1157 static void build_mixer_unit_ctl(struct mixer_build *state, unsigned char *desc,
1158                                  int in_pin, int in_ch, int unitid,
1159                                  struct usb_audio_term *iterm)
1160 {
1161         struct usb_mixer_elem_info *cval;
1162         unsigned int input_pins = desc[4];
1163         unsigned int num_outs = desc[5 + input_pins];
1164         unsigned int i, len;
1165         struct snd_kcontrol *kctl;
1166         const struct usbmix_name_map *map;
1167
1168         map = find_map(state, unitid, 0);
1169         if (check_ignored_ctl(map))
1170                 return;
1171
1172         cval = kzalloc(sizeof(*cval), GFP_KERNEL);
1173         if (! cval)
1174                 return;
1175
1176         cval->mixer = state->mixer;
1177         cval->id = unitid;
1178         cval->control = in_ch + 1; /* based on 1 */
1179         cval->val_type = USB_MIXER_S16;
1180         for (i = 0; i < num_outs; i++) {
1181                 if (check_matrix_bitmap(desc + 9 + input_pins, in_ch, i, num_outs)) {
1182                         cval->cmask |= (1 << i);
1183                         cval->channels++;
1184                 }
1185         }
1186
1187         /* get min/max values */
1188         get_min_max(cval, 0);
1189
1190         kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval);
1191         if (! kctl) {
1192                 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
1193                 kfree(cval);
1194                 return;
1195         }
1196         kctl->private_free = usb_mixer_elem_free;
1197
1198         len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name));
1199         if (! len)
1200                 len = get_term_name(state, iterm, kctl->id.name, sizeof(kctl->id.name), 0);
1201         if (! len)
1202                 len = sprintf(kctl->id.name, "Mixer Source %d", in_ch + 1);
1203         append_ctl_name(kctl, " Volume");
1204
1205         snd_printdd(KERN_INFO "[%d] MU [%s] ch = %d, val = %d/%d\n",
1206                     cval->id, kctl->id.name, cval->channels, cval->min, cval->max);
1207         add_control_to_empty(state, kctl);
1208 }
1209
1210
1211 /*
1212  * parse a mixer unit
1213  */
1214 static int parse_audio_mixer_unit(struct mixer_build *state, int unitid, unsigned char *desc)
1215 {
1216         struct usb_audio_term iterm;
1217         int input_pins, num_ins, num_outs;
1218         int pin, ich, err;
1219
1220         if (desc[0] < 11 || ! (input_pins = desc[4]) || ! (num_outs = desc[5 + input_pins])) {
1221                 snd_printk(KERN_ERR "invalid MIXER UNIT descriptor %d\n", unitid);
1222                 return -EINVAL;
1223         }
1224         /* no bmControls field (e.g. Maya44) -> ignore */
1225         if (desc[0] <= 10 + input_pins) {
1226                 snd_printdd(KERN_INFO "MU %d has no bmControls field\n", unitid);
1227                 return 0;
1228         }
1229
1230         num_ins = 0;
1231         ich = 0;
1232         for (pin = 0; pin < input_pins; pin++) {
1233                 err = parse_audio_unit(state, desc[5 + pin]);
1234                 if (err < 0)
1235                         return err;
1236                 err = check_input_term(state, desc[5 + pin], &iterm);
1237                 if (err < 0)
1238                         return err;
1239                 num_ins += iterm.channels;
1240                 for (; ich < num_ins; ++ich) {
1241                         int och, ich_has_controls = 0;
1242
1243                         for (och = 0; och < num_outs; ++och) {
1244                                 if (check_matrix_bitmap(desc + 9 + input_pins,
1245                                                         ich, och, num_outs)) {
1246                                         ich_has_controls = 1;
1247                                         break;
1248                                 }
1249                         }
1250                         if (ich_has_controls)
1251                                 build_mixer_unit_ctl(state, desc, pin, ich,
1252                                                      unitid, &iterm);
1253                 }
1254         }
1255         return 0;
1256 }
1257
1258
1259 /*
1260  * Processing Unit / Extension Unit
1261  */
1262
1263 /* get callback for processing/extension unit */
1264 static int mixer_ctl_procunit_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
1265 {
1266         struct usb_mixer_elem_info *cval = kcontrol->private_data;
1267         int err, val;
1268
1269         err = get_cur_ctl_value(cval, cval->control << 8, &val);
1270         if (err < 0 && cval->mixer->ignore_ctl_error) {
1271                 ucontrol->value.integer.value[0] = cval->min;
1272                 return 0;
1273         }
1274         if (err < 0)
1275                 return err;
1276         val = get_relative_value(cval, val);
1277         ucontrol->value.integer.value[0] = val;
1278         return 0;
1279 }
1280
1281 /* put callback for processing/extension unit */
1282 static int mixer_ctl_procunit_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
1283 {
1284         struct usb_mixer_elem_info *cval = kcontrol->private_data;
1285         int val, oval, err;
1286
1287         err = get_cur_ctl_value(cval, cval->control << 8, &oval);
1288         if (err < 0) {
1289                 if (cval->mixer->ignore_ctl_error)
1290                         return 0;
1291                 return err;
1292         }
1293         val = ucontrol->value.integer.value[0];
1294         val = get_abs_value(cval, val);
1295         if (val != oval) {
1296                 set_cur_ctl_value(cval, cval->control << 8, val);
1297                 return 1;
1298         }
1299         return 0;
1300 }
1301
1302 /* alsa control interface for processing/extension unit */
1303 static struct snd_kcontrol_new mixer_procunit_ctl = {
1304         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1305         .name = "", /* will be filled later */
1306         .info = mixer_ctl_feature_info,
1307         .get = mixer_ctl_procunit_get,
1308         .put = mixer_ctl_procunit_put,
1309 };
1310
1311
1312 /*
1313  * predefined data for processing units
1314  */
1315 struct procunit_value_info {
1316         int control;
1317         char *suffix;
1318         int val_type;
1319         int min_value;
1320 };
1321
1322 struct procunit_info {
1323         int type;
1324         char *name;
1325         struct procunit_value_info *values;
1326 };
1327
1328 static struct procunit_value_info updown_proc_info[] = {
1329         { USB_PROC_UPDOWN_SWITCH, "Switch", USB_MIXER_BOOLEAN },
1330         { USB_PROC_UPDOWN_MODE_SEL, "Mode Select", USB_MIXER_U8, 1 },
1331         { 0 }
1332 };
1333 static struct procunit_value_info prologic_proc_info[] = {
1334         { USB_PROC_PROLOGIC_SWITCH, "Switch", USB_MIXER_BOOLEAN },
1335         { USB_PROC_PROLOGIC_MODE_SEL, "Mode Select", USB_MIXER_U8, 1 },
1336         { 0 }
1337 };
1338 static struct procunit_value_info threed_enh_proc_info[] = {
1339         { USB_PROC_3DENH_SWITCH, "Switch", USB_MIXER_BOOLEAN },
1340         { USB_PROC_3DENH_SPACE, "Spaciousness", USB_MIXER_U8 },
1341         { 0 }
1342 };
1343 static struct procunit_value_info reverb_proc_info[] = {
1344         { USB_PROC_REVERB_SWITCH, "Switch", USB_MIXER_BOOLEAN },
1345         { USB_PROC_REVERB_LEVEL, "Level", USB_MIXER_U8 },
1346         { USB_PROC_REVERB_TIME, "Time", USB_MIXER_U16 },
1347         { USB_PROC_REVERB_DELAY, "Delay", USB_MIXER_U8 },
1348         { 0 }
1349 };
1350 static struct procunit_value_info chorus_proc_info[] = {
1351         { USB_PROC_CHORUS_SWITCH, "Switch", USB_MIXER_BOOLEAN },
1352         { USB_PROC_CHORUS_LEVEL, "Level", USB_MIXER_U8 },
1353         { USB_PROC_CHORUS_RATE, "Rate", USB_MIXER_U16 },
1354         { USB_PROC_CHORUS_DEPTH, "Depth", USB_MIXER_U16 },
1355         { 0 }
1356 };
1357 static struct procunit_value_info dcr_proc_info[] = {
1358         { USB_PROC_DCR_SWITCH, "Switch", USB_MIXER_BOOLEAN },
1359         { USB_PROC_DCR_RATIO, "Ratio", USB_MIXER_U16 },
1360         { USB_PROC_DCR_MAX_AMP, "Max Amp", USB_MIXER_S16 },
1361         { USB_PROC_DCR_THRESHOLD, "Threshold", USB_MIXER_S16 },
1362         { USB_PROC_DCR_ATTACK, "Attack Time", USB_MIXER_U16 },
1363         { USB_PROC_DCR_RELEASE, "Release Time", USB_MIXER_U16 },
1364         { 0 }
1365 };
1366
1367 static struct procunit_info procunits[] = {
1368         { USB_PROC_UPDOWN, "Up Down", updown_proc_info },
1369         { USB_PROC_PROLOGIC, "Dolby Prologic", prologic_proc_info },
1370         { USB_PROC_3DENH, "3D Stereo Extender", threed_enh_proc_info },
1371         { USB_PROC_REVERB, "Reverb", reverb_proc_info },
1372         { USB_PROC_CHORUS, "Chorus", chorus_proc_info },
1373         { USB_PROC_DCR, "DCR", dcr_proc_info },
1374         { 0 },
1375 };
1376 /*
1377  * predefined data for extension units
1378  */
1379 static struct procunit_value_info clock_rate_xu_info[] = {
1380        { USB_XU_CLOCK_RATE_SELECTOR, "Selector", USB_MIXER_U8, 0 },
1381        { 0 }
1382 };
1383 static struct procunit_value_info clock_source_xu_info[] = {
1384         { USB_XU_CLOCK_SOURCE_SELECTOR, "External", USB_MIXER_BOOLEAN },
1385         { 0 }
1386 };
1387 static struct procunit_value_info spdif_format_xu_info[] = {
1388         { USB_XU_DIGITAL_FORMAT_SELECTOR, "SPDIF/AC3", USB_MIXER_BOOLEAN },
1389         { 0 }
1390 };
1391 static struct procunit_value_info soft_limit_xu_info[] = {
1392         { USB_XU_SOFT_LIMIT_SELECTOR, " ", USB_MIXER_BOOLEAN },
1393         { 0 }
1394 };
1395 static struct procunit_info extunits[] = {
1396         { USB_XU_CLOCK_RATE, "Clock rate", clock_rate_xu_info },
1397         { USB_XU_CLOCK_SOURCE, "DigitalIn CLK source", clock_source_xu_info },
1398         { USB_XU_DIGITAL_IO_STATUS, "DigitalOut format:", spdif_format_xu_info },
1399         { USB_XU_DEVICE_OPTIONS, "AnalogueIn Soft Limit", soft_limit_xu_info },
1400         { 0 }
1401 };
1402 /*
1403  * build a processing/extension unit
1404  */
1405 static int build_audio_procunit(struct mixer_build *state, int unitid, unsigned char *dsc, struct procunit_info *list, char *name)
1406 {
1407         int num_ins = dsc[6];
1408         struct usb_mixer_elem_info *cval;
1409         struct snd_kcontrol *kctl;
1410         int i, err, nameid, type, len;
1411         struct procunit_info *info;
1412         struct procunit_value_info *valinfo;
1413         const struct usbmix_name_map *map;
1414         static struct procunit_value_info default_value_info[] = {
1415                 { 0x01, "Switch", USB_MIXER_BOOLEAN },
1416                 { 0 }
1417         };
1418         static struct procunit_info default_info = {
1419                 0, NULL, default_value_info
1420         };
1421
1422         if (dsc[0] < 13 || dsc[0] < 13 + num_ins || dsc[0] < num_ins + dsc[11 + num_ins]) {
1423                 snd_printk(KERN_ERR "invalid %s descriptor (id %d)\n", name, unitid);
1424                 return -EINVAL;
1425         }
1426
1427         for (i = 0; i < num_ins; i++) {
1428                 if ((err = parse_audio_unit(state, dsc[7 + i])) < 0)
1429                         return err;
1430         }
1431
1432         type = combine_word(&dsc[4]);
1433         for (info = list; info && info->type; info++)
1434                 if (info->type == type)
1435                         break;
1436         if (! info || ! info->type)
1437                 info = &default_info;
1438
1439         for (valinfo = info->values; valinfo->control; valinfo++) {
1440                 /* FIXME: bitmap might be longer than 8bit */
1441                 if (! (dsc[12 + num_ins] & (1 << (valinfo->control - 1))))
1442                         continue;
1443                 map = find_map(state, unitid, valinfo->control);
1444                 if (check_ignored_ctl(map))
1445                         continue;
1446                 cval = kzalloc(sizeof(*cval), GFP_KERNEL);
1447                 if (! cval) {
1448                         snd_printk(KERN_ERR "cannot malloc kcontrol\n");
1449                         return -ENOMEM;
1450                 }
1451                 cval->mixer = state->mixer;
1452                 cval->id = unitid;
1453                 cval->control = valinfo->control;
1454                 cval->val_type = valinfo->val_type;
1455                 cval->channels = 1;
1456
1457                 /* get min/max values */
1458                 if (type == USB_PROC_UPDOWN && cval->control == USB_PROC_UPDOWN_MODE_SEL) {
1459                         /* FIXME: hard-coded */
1460                         cval->min = 1;
1461                         cval->max = dsc[15];
1462                         cval->res = 1;
1463                         cval->initialized = 1;
1464                 } else {
1465                         if (type == USB_XU_CLOCK_RATE) {
1466                                 /* E-Mu USB 0404/0202/TrackerPre
1467                                  * samplerate control quirk
1468                                  */
1469                                 cval->min = 0;
1470                                 cval->max = 5;
1471                                 cval->res = 1;
1472                                 cval->initialized = 1;
1473                         } else
1474                                 get_min_max(cval, valinfo->min_value);
1475                 }
1476
1477                 kctl = snd_ctl_new1(&mixer_procunit_ctl, cval);
1478                 if (! kctl) {
1479                         snd_printk(KERN_ERR "cannot malloc kcontrol\n");
1480                         kfree(cval);
1481                         return -ENOMEM;
1482                 }
1483                 kctl->private_free = usb_mixer_elem_free;
1484
1485                 if (check_mapped_name(map, kctl->id.name,
1486                                                 sizeof(kctl->id.name)))
1487                         /* nothing */ ;
1488                 else if (info->name)
1489                         strlcpy(kctl->id.name, info->name, sizeof(kctl->id.name));
1490                 else {
1491                         nameid = dsc[12 + num_ins + dsc[11 + num_ins]];
1492                         len = 0;
1493                         if (nameid)
1494                                 len = snd_usb_copy_string_desc(state, nameid, kctl->id.name, sizeof(kctl->id.name));
1495                         if (! len)
1496                                 strlcpy(kctl->id.name, name, sizeof(kctl->id.name));
1497                 }
1498                 append_ctl_name(kctl, " ");
1499                 append_ctl_name(kctl, valinfo->suffix);
1500
1501                 snd_printdd(KERN_INFO "[%d] PU [%s] ch = %d, val = %d/%d\n",
1502                             cval->id, kctl->id.name, cval->channels, cval->min, cval->max);
1503                 if ((err = add_control_to_empty(state, kctl)) < 0)
1504                         return err;
1505         }
1506         return 0;
1507 }
1508
1509
1510 static int parse_audio_processing_unit(struct mixer_build *state, int unitid, unsigned char *desc)
1511 {
1512         return build_audio_procunit(state, unitid, desc, procunits, "Processing Unit");
1513 }
1514
1515 static int parse_audio_extension_unit(struct mixer_build *state, int unitid, unsigned char *desc)
1516 {
1517         return build_audio_procunit(state, unitid, desc, extunits, "Extension Unit");
1518 }
1519
1520
1521 /*
1522  * Selector Unit
1523  */
1524
1525 /* info callback for selector unit
1526  * use an enumerator type for routing
1527  */
1528 static int mixer_ctl_selector_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
1529 {
1530         struct usb_mixer_elem_info *cval = kcontrol->private_data;
1531         char **itemlist = (char **)kcontrol->private_value;
1532
1533         if (snd_BUG_ON(!itemlist))
1534                 return -EINVAL;
1535         uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
1536         uinfo->count = 1;
1537         uinfo->value.enumerated.items = cval->max;
1538         if ((int)uinfo->value.enumerated.item >= cval->max)
1539                 uinfo->value.enumerated.item = cval->max - 1;
1540         strcpy(uinfo->value.enumerated.name, itemlist[uinfo->value.enumerated.item]);
1541         return 0;
1542 }
1543
1544 /* get callback for selector unit */
1545 static int mixer_ctl_selector_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
1546 {
1547         struct usb_mixer_elem_info *cval = kcontrol->private_data;
1548         int val, err;
1549
1550         err = get_cur_ctl_value(cval, 0, &val);
1551         if (err < 0) {
1552                 if (cval->mixer->ignore_ctl_error) {
1553                         ucontrol->value.enumerated.item[0] = 0;
1554                         return 0;
1555                 }
1556                 return err;
1557         }
1558         val = get_relative_value(cval, val);
1559         ucontrol->value.enumerated.item[0] = val;
1560         return 0;
1561 }
1562
1563 /* put callback for selector unit */
1564 static int mixer_ctl_selector_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
1565 {
1566         struct usb_mixer_elem_info *cval = kcontrol->private_data;
1567         int val, oval, err;
1568
1569         err = get_cur_ctl_value(cval, 0, &oval);
1570         if (err < 0) {
1571                 if (cval->mixer->ignore_ctl_error)
1572                         return 0;
1573                 return err;
1574         }
1575         val = ucontrol->value.enumerated.item[0];
1576         val = get_abs_value(cval, val);
1577         if (val != oval) {
1578                 set_cur_ctl_value(cval, 0, val);
1579                 return 1;
1580         }
1581         return 0;
1582 }
1583
1584 /* alsa control interface for selector unit */
1585 static struct snd_kcontrol_new mixer_selectunit_ctl = {
1586         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1587         .name = "", /* will be filled later */
1588         .info = mixer_ctl_selector_info,
1589         .get = mixer_ctl_selector_get,
1590         .put = mixer_ctl_selector_put,
1591 };
1592
1593
1594 /* private free callback.
1595  * free both private_data and private_value
1596  */
1597 static void usb_mixer_selector_elem_free(struct snd_kcontrol *kctl)
1598 {
1599         int i, num_ins = 0;
1600
1601         if (kctl->private_data) {
1602                 struct usb_mixer_elem_info *cval = kctl->private_data;
1603                 num_ins = cval->max;
1604                 kfree(cval);
1605                 kctl->private_data = NULL;
1606         }
1607         if (kctl->private_value) {
1608                 char **itemlist = (char **)kctl->private_value;
1609                 for (i = 0; i < num_ins; i++)
1610                         kfree(itemlist[i]);
1611                 kfree(itemlist);
1612                 kctl->private_value = 0;
1613         }
1614 }
1615
1616 /*
1617  * parse a selector unit
1618  */
1619 static int parse_audio_selector_unit(struct mixer_build *state, int unitid, unsigned char *desc)
1620 {
1621         unsigned int num_ins = desc[4];
1622         unsigned int i, nameid, len;
1623         int err;
1624         struct usb_mixer_elem_info *cval;
1625         struct snd_kcontrol *kctl;
1626         const struct usbmix_name_map *map;
1627         char **namelist;
1628
1629         if (! num_ins || desc[0] < 5 + num_ins) {
1630                 snd_printk(KERN_ERR "invalid SELECTOR UNIT descriptor %d\n", unitid);
1631                 return -EINVAL;
1632         }
1633
1634         for (i = 0; i < num_ins; i++) {
1635                 if ((err = parse_audio_unit(state, desc[5 + i])) < 0)
1636                         return err;
1637         }
1638
1639         if (num_ins == 1) /* only one ? nonsense! */
1640                 return 0;
1641
1642         map = find_map(state, unitid, 0);
1643         if (check_ignored_ctl(map))
1644                 return 0;
1645
1646         cval = kzalloc(sizeof(*cval), GFP_KERNEL);
1647         if (! cval) {
1648                 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
1649                 return -ENOMEM;
1650         }
1651         cval->mixer = state->mixer;
1652         cval->id = unitid;
1653         cval->val_type = USB_MIXER_U8;
1654         cval->channels = 1;
1655         cval->min = 1;
1656         cval->max = num_ins;
1657         cval->res = 1;
1658         cval->initialized = 1;
1659
1660         namelist = kmalloc(sizeof(char *) * num_ins, GFP_KERNEL);
1661         if (! namelist) {
1662                 snd_printk(KERN_ERR "cannot malloc\n");
1663                 kfree(cval);
1664                 return -ENOMEM;
1665         }
1666 #define MAX_ITEM_NAME_LEN       64
1667         for (i = 0; i < num_ins; i++) {
1668                 struct usb_audio_term iterm;
1669                 len = 0;
1670                 namelist[i] = kmalloc(MAX_ITEM_NAME_LEN, GFP_KERNEL);
1671                 if (! namelist[i]) {
1672                         snd_printk(KERN_ERR "cannot malloc\n");
1673                         while (i--)
1674                                 kfree(namelist[i]);
1675                         kfree(namelist);
1676                         kfree(cval);
1677                         return -ENOMEM;
1678                 }
1679                 len = check_mapped_selector_name(state, unitid, i, namelist[i],
1680                                                  MAX_ITEM_NAME_LEN);
1681                 if (! len && check_input_term(state, desc[5 + i], &iterm) >= 0)
1682                         len = get_term_name(state, &iterm, namelist[i], MAX_ITEM_NAME_LEN, 0);
1683                 if (! len)
1684                         sprintf(namelist[i], "Input %d", i);
1685         }
1686
1687         kctl = snd_ctl_new1(&mixer_selectunit_ctl, cval);
1688         if (! kctl) {
1689                 snd_printk(KERN_ERR "cannot malloc kcontrol\n");
1690                 kfree(namelist);
1691                 kfree(cval);
1692                 return -ENOMEM;
1693         }
1694         kctl->private_value = (unsigned long)namelist;
1695         kctl->private_free = usb_mixer_selector_elem_free;
1696
1697         nameid = desc[desc[0] - 1];
1698         len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name));
1699         if (len)
1700                 ;
1701         else if (nameid)
1702                 snd_usb_copy_string_desc(state, nameid, kctl->id.name, sizeof(kctl->id.name));
1703         else {
1704                 len = get_term_name(state, &state->oterm,
1705                                     kctl->id.name, sizeof(kctl->id.name), 0);
1706                 if (! len)
1707                         strlcpy(kctl->id.name, "USB", sizeof(kctl->id.name));
1708
1709                 if ((state->oterm.type & 0xff00) == 0x0100)
1710                         append_ctl_name(kctl, " Capture Source");
1711                 else
1712                         append_ctl_name(kctl, " Playback Source");
1713         }
1714
1715         snd_printdd(KERN_INFO "[%d] SU [%s] items = %d\n",
1716                     cval->id, kctl->id.name, num_ins);
1717         if ((err = add_control_to_empty(state, kctl)) < 0)
1718                 return err;
1719
1720         return 0;
1721 }
1722
1723
1724 /*
1725  * parse an audio unit recursively
1726  */
1727
1728 static int parse_audio_unit(struct mixer_build *state, int unitid)
1729 {
1730         unsigned char *p1;
1731
1732         if (test_and_set_bit(unitid, state->unitbitmap))
1733                 return 0; /* the unit already visited */
1734
1735         p1 = find_audio_control_unit(state, unitid);
1736         if (!p1) {
1737                 snd_printk(KERN_ERR "usbaudio: unit %d not found!\n", unitid);
1738                 return -EINVAL;
1739         }
1740
1741         switch (p1[2]) {
1742         case UAC_INPUT_TERMINAL:
1743                 return 0; /* NOP */
1744         case UAC_MIXER_UNIT:
1745                 return parse_audio_mixer_unit(state, unitid, p1);
1746         case UAC_SELECTOR_UNIT:
1747                 return parse_audio_selector_unit(state, unitid, p1);
1748         case UAC_FEATURE_UNIT:
1749                 return parse_audio_feature_unit(state, unitid, p1);
1750         case UAC_PROCESSING_UNIT_V1:
1751                 return parse_audio_processing_unit(state, unitid, p1);
1752         case UAC_EXTENSION_UNIT_V1:
1753                 return parse_audio_extension_unit(state, unitid, p1);
1754         default:
1755                 snd_printk(KERN_ERR "usbaudio: unit %u: unexpected type 0x%02x\n", unitid, p1[2]);
1756                 return -EINVAL;
1757         }
1758 }
1759
1760 static void snd_usb_mixer_free(struct usb_mixer_interface *mixer)
1761 {
1762         kfree(mixer->id_elems);
1763         if (mixer->urb) {
1764                 kfree(mixer->urb->transfer_buffer);
1765                 usb_free_urb(mixer->urb);
1766         }
1767         usb_free_urb(mixer->rc_urb);
1768         kfree(mixer->rc_setup_packet);
1769         kfree(mixer);
1770 }
1771
1772 static int snd_usb_mixer_dev_free(struct snd_device *device)
1773 {
1774         struct usb_mixer_interface *mixer = device->device_data;
1775         snd_usb_mixer_free(mixer);
1776         return 0;
1777 }
1778
1779 /*
1780  * create mixer controls
1781  *
1782  * walk through all UAC_OUTPUT_TERMINAL descriptors to search for mixers
1783  */
1784 static int snd_usb_mixer_controls(struct usb_mixer_interface *mixer)
1785 {
1786         struct uac_output_terminal_descriptor_v1 *desc;
1787         struct mixer_build state;
1788         int err;
1789         const struct usbmix_ctl_map *map;
1790         struct usb_host_interface *hostif;
1791
1792         hostif = &usb_ifnum_to_if(mixer->chip->dev, mixer->ctrlif)->altsetting[0];
1793         memset(&state, 0, sizeof(state));
1794         state.chip = mixer->chip;
1795         state.mixer = mixer;
1796         state.buffer = hostif->extra;
1797         state.buflen = hostif->extralen;
1798
1799         /* check the mapping table */
1800         for (map = usbmix_ctl_maps; map->id; map++) {
1801                 if (map->id == state.chip->usb_id) {
1802                         state.map = map->map;
1803                         state.selector_map = map->selector_map;
1804                         mixer->ignore_ctl_error = map->ignore_ctl_error;
1805                         break;
1806                 }
1807         }
1808
1809         desc = NULL;
1810         while ((desc = snd_usb_find_csint_desc(hostif->extra, hostif->extralen, desc, UAC_OUTPUT_TERMINAL)) != NULL) {
1811                 if (desc->bLength < 9)
1812                         continue; /* invalid descriptor? */
1813                 set_bit(desc->bTerminalID, state.unitbitmap);  /* mark terminal ID as visited */
1814                 state.oterm.id = desc->bTerminalID;
1815                 state.oterm.type = le16_to_cpu(desc->wTerminalType);
1816                 state.oterm.name = desc->iTerminal;
1817                 err = parse_audio_unit(&state, desc->bSourceID);
1818                 if (err < 0)
1819                         return err;
1820         }
1821         return 0;
1822 }
1823
1824 static void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer,
1825                                     int unitid)
1826 {
1827         struct usb_mixer_elem_info *info;
1828
1829         for (info = mixer->id_elems[unitid]; info; info = info->next_id_elem)
1830                 snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
1831                                info->elem_id);
1832 }
1833
1834 static void snd_usb_mixer_dump_cval(struct snd_info_buffer *buffer,
1835                                     int unitid,
1836                                     struct usb_mixer_elem_info *cval)
1837 {
1838         static char *val_types[] = {"BOOLEAN", "INV_BOOLEAN",
1839                                     "S8", "U8", "S16", "U16"};
1840         snd_iprintf(buffer, "  Unit: %i\n", unitid);
1841         if (cval->elem_id)
1842                 snd_iprintf(buffer, "    Control: name=\"%s\", index=%i\n",
1843                                 cval->elem_id->name, cval->elem_id->index);
1844         snd_iprintf(buffer, "    Info: id=%i, control=%i, cmask=0x%x, "
1845                             "channels=%i, type=\"%s\"\n", cval->id,
1846                             cval->control, cval->cmask, cval->channels,
1847                             val_types[cval->val_type]);
1848         snd_iprintf(buffer, "    Volume: min=%i, max=%i, dBmin=%i, dBmax=%i\n",
1849                             cval->min, cval->max, cval->dBmin, cval->dBmax);
1850 }
1851
1852 static void snd_usb_mixer_proc_read(struct snd_info_entry *entry,
1853                                     struct snd_info_buffer *buffer)
1854 {
1855         struct snd_usb_audio *chip = entry->private_data;
1856         struct usb_mixer_interface *mixer;
1857         struct usb_mixer_elem_info *cval;
1858         int unitid;
1859
1860         list_for_each_entry(mixer, &chip->mixer_list, list) {
1861                 snd_iprintf(buffer,
1862                         "USB Mixer: usb_id=0x%08x, ctrlif=%i, ctlerr=%i\n",
1863                                 chip->usb_id, mixer->ctrlif,
1864                                 mixer->ignore_ctl_error);
1865                 snd_iprintf(buffer, "Card: %s\n", chip->card->longname);
1866                 for (unitid = 0; unitid < MAX_ID_ELEMS; unitid++) {
1867                         for (cval = mixer->id_elems[unitid]; cval;
1868                                                 cval = cval->next_id_elem)
1869                                 snd_usb_mixer_dump_cval(buffer, unitid, cval);
1870                 }
1871         }
1872 }
1873
1874 static void snd_usb_mixer_memory_change(struct usb_mixer_interface *mixer,
1875                                         int unitid)
1876 {
1877         if (!mixer->rc_cfg)
1878                 return;
1879         /* unit ids specific to Extigy/Audigy 2 NX: */
1880         switch (unitid) {
1881         case 0: /* remote control */
1882                 mixer->rc_urb->dev = mixer->chip->dev;
1883                 usb_submit_urb(mixer->rc_urb, GFP_ATOMIC);
1884                 break;
1885         case 4: /* digital in jack */
1886         case 7: /* line in jacks */
1887         case 19: /* speaker out jacks */
1888         case 20: /* headphones out jack */
1889                 break;
1890         /* live24ext: 4 = line-in jack */
1891         case 3: /* hp-out jack (may actuate Mute) */
1892                 if (mixer->chip->usb_id == USB_ID(0x041e, 0x3040) ||
1893                     mixer->chip->usb_id == USB_ID(0x041e, 0x3048))
1894                         snd_usb_mixer_notify_id(mixer, mixer->rc_cfg->mute_mixer_id);
1895                 break;
1896         default:
1897                 snd_printd(KERN_DEBUG "memory change in unknown unit %d\n", unitid);
1898                 break;
1899         }
1900 }
1901
1902 static void snd_usb_mixer_status_complete(struct urb *urb)
1903 {
1904         struct usb_mixer_interface *mixer = urb->context;
1905
1906         if (urb->status == 0) {
1907                 u8 *buf = urb->transfer_buffer;
1908                 int i;
1909
1910                 for (i = urb->actual_length; i >= 2; buf += 2, i -= 2) {
1911                         snd_printd(KERN_DEBUG "status interrupt: %02x %02x\n",
1912                                    buf[0], buf[1]);
1913                         /* ignore any notifications not from the control interface */
1914                         if ((buf[0] & 0x0f) != 0)
1915                                 continue;
1916                         if (!(buf[0] & 0x40))
1917                                 snd_usb_mixer_notify_id(mixer, buf[1]);
1918                         else
1919                                 snd_usb_mixer_memory_change(mixer, buf[1]);
1920                 }
1921         }
1922         if (urb->status != -ENOENT && urb->status != -ECONNRESET) {
1923                 urb->dev = mixer->chip->dev;
1924                 usb_submit_urb(urb, GFP_ATOMIC);
1925         }
1926 }
1927
1928 /* create the handler for the optional status interrupt endpoint */
1929 static int snd_usb_mixer_status_create(struct usb_mixer_interface *mixer)
1930 {
1931         struct usb_host_interface *hostif;
1932         struct usb_endpoint_descriptor *ep;
1933         void *transfer_buffer;
1934         int buffer_length;
1935         unsigned int epnum;
1936
1937         hostif = &usb_ifnum_to_if(mixer->chip->dev, mixer->ctrlif)->altsetting[0];
1938         /* we need one interrupt input endpoint */
1939         if (get_iface_desc(hostif)->bNumEndpoints < 1)
1940                 return 0;
1941         ep = get_endpoint(hostif, 0);
1942         if (!usb_endpoint_dir_in(ep) || !usb_endpoint_xfer_int(ep))
1943                 return 0;
1944
1945         epnum = usb_endpoint_num(ep);
1946         buffer_length = le16_to_cpu(ep->wMaxPacketSize);
1947         transfer_buffer = kmalloc(buffer_length, GFP_KERNEL);
1948         if (!transfer_buffer)
1949                 return -ENOMEM;
1950         mixer->urb = usb_alloc_urb(0, GFP_KERNEL);
1951         if (!mixer->urb) {
1952                 kfree(transfer_buffer);
1953                 return -ENOMEM;
1954         }
1955         usb_fill_int_urb(mixer->urb, mixer->chip->dev,
1956                          usb_rcvintpipe(mixer->chip->dev, epnum),
1957                          transfer_buffer, buffer_length,
1958                          snd_usb_mixer_status_complete, mixer, ep->bInterval);
1959         usb_submit_urb(mixer->urb, GFP_KERNEL);
1960         return 0;
1961 }
1962
1963 static void snd_usb_soundblaster_remote_complete(struct urb *urb)
1964 {
1965         struct usb_mixer_interface *mixer = urb->context;
1966         const struct rc_config *rc = mixer->rc_cfg;
1967         u32 code;
1968
1969         if (urb->status < 0 || urb->actual_length < rc->min_packet_length)
1970                 return;
1971
1972         code = mixer->rc_buffer[rc->offset];
1973         if (rc->length == 2)
1974                 code |= mixer->rc_buffer[rc->offset + 1] << 8;
1975
1976         /* the Mute button actually changes the mixer control */
1977         if (code == rc->mute_code)
1978                 snd_usb_mixer_notify_id(mixer, rc->mute_mixer_id);
1979         mixer->rc_code = code;
1980         wmb();
1981         wake_up(&mixer->rc_waitq);
1982 }
1983
1984 static long snd_usb_sbrc_hwdep_read(struct snd_hwdep *hw, char __user *buf,
1985                                      long count, loff_t *offset)
1986 {
1987         struct usb_mixer_interface *mixer = hw->private_data;
1988         int err;
1989         u32 rc_code;
1990
1991         if (count != 1 && count != 4)
1992                 return -EINVAL;
1993         err = wait_event_interruptible(mixer->rc_waitq,
1994                                        (rc_code = xchg(&mixer->rc_code, 0)) != 0);
1995         if (err == 0) {
1996                 if (count == 1)
1997                         err = put_user(rc_code, buf);
1998                 else
1999                         err = put_user(rc_code, (u32 __user *)buf);
2000         }
2001         return err < 0 ? err : count;
2002 }
2003
2004 static unsigned int snd_usb_sbrc_hwdep_poll(struct snd_hwdep *hw, struct file *file,
2005                                             poll_table *wait)
2006 {
2007         struct usb_mixer_interface *mixer = hw->private_data;
2008
2009         poll_wait(file, &mixer->rc_waitq, wait);
2010         return mixer->rc_code ? POLLIN | POLLRDNORM : 0;
2011 }
2012
2013 static int snd_usb_soundblaster_remote_init(struct usb_mixer_interface *mixer)
2014 {
2015         struct snd_hwdep *hwdep;
2016         int err, len, i;
2017
2018         for (i = 0; i < ARRAY_SIZE(rc_configs); ++i)
2019                 if (rc_configs[i].usb_id == mixer->chip->usb_id)
2020                         break;
2021         if (i >= ARRAY_SIZE(rc_configs))
2022                 return 0;
2023         mixer->rc_cfg = &rc_configs[i];
2024
2025         len = mixer->rc_cfg->packet_length;
2026
2027         init_waitqueue_head(&mixer->rc_waitq);
2028         err = snd_hwdep_new(mixer->chip->card, "SB remote control", 0, &hwdep);
2029         if (err < 0)
2030                 return err;
2031         snprintf(hwdep->name, sizeof(hwdep->name),
2032                  "%s remote control", mixer->chip->card->shortname);
2033         hwdep->iface = SNDRV_HWDEP_IFACE_SB_RC;
2034         hwdep->private_data = mixer;
2035         hwdep->ops.read = snd_usb_sbrc_hwdep_read;
2036         hwdep->ops.poll = snd_usb_sbrc_hwdep_poll;
2037         hwdep->exclusive = 1;
2038
2039         mixer->rc_urb = usb_alloc_urb(0, GFP_KERNEL);
2040         if (!mixer->rc_urb)
2041                 return -ENOMEM;
2042         mixer->rc_setup_packet = kmalloc(sizeof(*mixer->rc_setup_packet), GFP_KERNEL);
2043         if (!mixer->rc_setup_packet) {
2044                 usb_free_urb(mixer->rc_urb);
2045                 mixer->rc_urb = NULL;
2046                 return -ENOMEM;
2047         }
2048         mixer->rc_setup_packet->bRequestType =
2049                 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE;
2050         mixer->rc_setup_packet->bRequest = UAC_GET_MEM;
2051         mixer->rc_setup_packet->wValue = cpu_to_le16(0);
2052         mixer->rc_setup_packet->wIndex = cpu_to_le16(0);
2053         mixer->rc_setup_packet->wLength = cpu_to_le16(len);
2054         usb_fill_control_urb(mixer->rc_urb, mixer->chip->dev,
2055                              usb_rcvctrlpipe(mixer->chip->dev, 0),
2056                              (u8*)mixer->rc_setup_packet, mixer->rc_buffer, len,
2057                              snd_usb_soundblaster_remote_complete, mixer);
2058         return 0;
2059 }
2060
2061 #define snd_audigy2nx_led_info          snd_ctl_boolean_mono_info
2062
2063 static int snd_audigy2nx_led_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
2064 {
2065         struct usb_mixer_interface *mixer = snd_kcontrol_chip(kcontrol);
2066         int index = kcontrol->private_value;
2067
2068         ucontrol->value.integer.value[0] = mixer->audigy2nx_leds[index];
2069         return 0;
2070 }
2071
2072 static int snd_audigy2nx_led_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
2073 {
2074         struct usb_mixer_interface *mixer = snd_kcontrol_chip(kcontrol);
2075         int index = kcontrol->private_value;
2076         int value = ucontrol->value.integer.value[0];
2077         int err, changed;
2078
2079         if (value > 1)
2080                 return -EINVAL;
2081         changed = value != mixer->audigy2nx_leds[index];
2082         err = snd_usb_ctl_msg(mixer->chip->dev,
2083                               usb_sndctrlpipe(mixer->chip->dev, 0), 0x24,
2084                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
2085                               value, index + 2, NULL, 0, 100);
2086         if (err < 0)
2087                 return err;
2088         mixer->audigy2nx_leds[index] = value;
2089         return changed;
2090 }
2091
2092 static struct snd_kcontrol_new snd_audigy2nx_controls[] = {
2093         {
2094                 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
2095                 .name = "CMSS LED Switch",
2096                 .info = snd_audigy2nx_led_info,
2097                 .get = snd_audigy2nx_led_get,
2098                 .put = snd_audigy2nx_led_put,
2099                 .private_value = 0,
2100         },
2101         {
2102                 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
2103                 .name = "Power LED Switch",
2104                 .info = snd_audigy2nx_led_info,
2105                 .get = snd_audigy2nx_led_get,
2106                 .put = snd_audigy2nx_led_put,
2107                 .private_value = 1,
2108         },
2109         {
2110                 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
2111                 .name = "Dolby Digital LED Switch",
2112                 .info = snd_audigy2nx_led_info,
2113                 .get = snd_audigy2nx_led_get,
2114                 .put = snd_audigy2nx_led_put,
2115                 .private_value = 2,
2116         },
2117 };
2118
2119 static int snd_audigy2nx_controls_create(struct usb_mixer_interface *mixer)
2120 {
2121         int i, err;
2122
2123         for (i = 0; i < ARRAY_SIZE(snd_audigy2nx_controls); ++i) {
2124                 if (i > 1 && /* Live24ext has 2 LEDs only */
2125                         (mixer->chip->usb_id == USB_ID(0x041e, 0x3040) ||
2126                          mixer->chip->usb_id == USB_ID(0x041e, 0x3048)))
2127                         break;
2128                 err = snd_ctl_add(mixer->chip->card,
2129                                   snd_ctl_new1(&snd_audigy2nx_controls[i], mixer));
2130                 if (err < 0)
2131                         return err;
2132         }
2133         mixer->audigy2nx_leds[1] = 1; /* Power LED is on by default */
2134         return 0;
2135 }
2136
2137 static void snd_audigy2nx_proc_read(struct snd_info_entry *entry,
2138                                     struct snd_info_buffer *buffer)
2139 {
2140         static const struct sb_jack {
2141                 int unitid;
2142                 const char *name;
2143         }  jacks_audigy2nx[] = {
2144                 {4,  "dig in "},
2145                 {7,  "line in"},
2146                 {19, "spk out"},
2147                 {20, "hph out"},
2148                 {-1, NULL}
2149         }, jacks_live24ext[] = {
2150                 {4,  "line in"}, /* &1=Line, &2=Mic*/
2151                 {3,  "hph out"}, /* headphones */
2152                 {0,  "RC     "}, /* last command, 6 bytes see rc_config above */
2153                 {-1, NULL}
2154         };
2155         const struct sb_jack *jacks;
2156         struct usb_mixer_interface *mixer = entry->private_data;
2157         int i, err;
2158         u8 buf[3];
2159
2160         snd_iprintf(buffer, "%s jacks\n\n", mixer->chip->card->shortname);
2161         if (mixer->chip->usb_id == USB_ID(0x041e, 0x3020))
2162                 jacks = jacks_audigy2nx;
2163         else if (mixer->chip->usb_id == USB_ID(0x041e, 0x3040) ||
2164                  mixer->chip->usb_id == USB_ID(0x041e, 0x3048))
2165                 jacks = jacks_live24ext;
2166         else
2167                 return;
2168
2169         for (i = 0; jacks[i].name; ++i) {
2170                 snd_iprintf(buffer, "%s: ", jacks[i].name);
2171                 err = snd_usb_ctl_msg(mixer->chip->dev,
2172                                       usb_rcvctrlpipe(mixer->chip->dev, 0),
2173                                       UAC_GET_MEM, USB_DIR_IN | USB_TYPE_CLASS |
2174                                       USB_RECIP_INTERFACE, 0,
2175                                       jacks[i].unitid << 8, buf, 3, 100);
2176                 if (err == 3 && (buf[0] == 3 || buf[0] == 6))
2177                         snd_iprintf(buffer, "%02x %02x\n", buf[1], buf[2]);
2178                 else
2179                         snd_iprintf(buffer, "?\n");
2180         }
2181 }
2182
2183 static int snd_xonar_u1_switch_get(struct snd_kcontrol *kcontrol,
2184                                    struct snd_ctl_elem_value *ucontrol)
2185 {
2186         struct usb_mixer_interface *mixer = snd_kcontrol_chip(kcontrol);
2187
2188         ucontrol->value.integer.value[0] = !!(mixer->xonar_u1_status & 0x02);
2189         return 0;
2190 }
2191
2192 static int snd_xonar_u1_switch_put(struct snd_kcontrol *kcontrol,
2193                                    struct snd_ctl_elem_value *ucontrol)
2194 {
2195         struct usb_mixer_interface *mixer = snd_kcontrol_chip(kcontrol);
2196         u8 old_status, new_status;
2197         int err, changed;
2198
2199         old_status = mixer->xonar_u1_status;
2200         if (ucontrol->value.integer.value[0])
2201                 new_status = old_status | 0x02;
2202         else
2203                 new_status = old_status & ~0x02;
2204         changed = new_status != old_status;
2205         err = snd_usb_ctl_msg(mixer->chip->dev,
2206                               usb_sndctrlpipe(mixer->chip->dev, 0), 0x08,
2207                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
2208                               50, 0, &new_status, 1, 100);
2209         if (err < 0)
2210                 return err;
2211         mixer->xonar_u1_status = new_status;
2212         return changed;
2213 }
2214
2215 static struct snd_kcontrol_new snd_xonar_u1_output_switch = {
2216         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
2217         .name = "Digital Playback Switch",
2218         .info = snd_ctl_boolean_mono_info,
2219         .get = snd_xonar_u1_switch_get,
2220         .put = snd_xonar_u1_switch_put,
2221 };
2222
2223 static int snd_xonar_u1_controls_create(struct usb_mixer_interface *mixer)
2224 {
2225         int err;
2226
2227         err = snd_ctl_add(mixer->chip->card,
2228                           snd_ctl_new1(&snd_xonar_u1_output_switch, mixer));
2229         if (err < 0)
2230                 return err;
2231         mixer->xonar_u1_status = 0x05;
2232         return 0;
2233 }
2234
2235 void snd_emuusb_set_samplerate(struct snd_usb_audio *chip,
2236                                unsigned char samplerate_id)
2237 {
2238         struct usb_mixer_interface *mixer;
2239         struct usb_mixer_elem_info *cval;
2240         int unitid = 12; /* SamleRate ExtensionUnit ID */
2241
2242         list_for_each_entry(mixer, &chip->mixer_list, list) {
2243                 cval = mixer->id_elems[unitid];
2244                 if (cval) {
2245                         set_cur_ctl_value(cval, cval->control << 8,
2246                                           samplerate_id);
2247                         snd_usb_mixer_notify_id(mixer, unitid);
2248                 }
2249                 break;
2250         }
2251 }
2252
2253 int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif,
2254                          int ignore_error)
2255 {
2256         static struct snd_device_ops dev_ops = {
2257                 .dev_free = snd_usb_mixer_dev_free
2258         };
2259         struct usb_mixer_interface *mixer;
2260         struct snd_info_entry *entry;
2261         struct usb_host_interface *host_iface;
2262         int err, protocol;
2263
2264         strcpy(chip->card->mixername, "USB Mixer");
2265
2266         mixer = kzalloc(sizeof(*mixer), GFP_KERNEL);
2267         if (!mixer)
2268                 return -ENOMEM;
2269         mixer->chip = chip;
2270         mixer->ctrlif = ctrlif;
2271         mixer->ignore_ctl_error = ignore_error;
2272         mixer->id_elems = kcalloc(MAX_ID_ELEMS, sizeof(*mixer->id_elems),
2273                                   GFP_KERNEL);
2274         if (!mixer->id_elems) {
2275                 kfree(mixer);
2276                 return -ENOMEM;
2277         }
2278
2279         host_iface = &usb_ifnum_to_if(chip->dev, ctrlif)->altsetting[0];
2280         protocol = host_iface->desc.bInterfaceProtocol;
2281
2282         /* FIXME! */
2283         if (protocol != UAC_VERSION_1) {
2284                 snd_printk(KERN_WARNING "mixer interface protocol 0x%02x not yet supported\n",
2285                                         protocol);
2286                 return 0;
2287         }
2288
2289         if ((err = snd_usb_mixer_controls(mixer)) < 0 ||
2290             (err = snd_usb_mixer_status_create(mixer)) < 0)
2291                 goto _error;
2292
2293         if ((err = snd_usb_soundblaster_remote_init(mixer)) < 0)
2294                 goto _error;
2295
2296         if (mixer->chip->usb_id == USB_ID(0x041e, 0x3020) ||
2297             mixer->chip->usb_id == USB_ID(0x041e, 0x3040) ||
2298             mixer->chip->usb_id == USB_ID(0x041e, 0x3048)) {
2299                 if ((err = snd_audigy2nx_controls_create(mixer)) < 0)
2300                         goto _error;
2301                 if (!snd_card_proc_new(chip->card, "audigy2nx", &entry))
2302                         snd_info_set_text_ops(entry, mixer,
2303                                               snd_audigy2nx_proc_read);
2304         }
2305
2306         if (mixer->chip->usb_id == USB_ID(0x0b05, 0x1739) ||
2307             mixer->chip->usb_id == USB_ID(0x0b05, 0x1743)) {
2308                 err = snd_xonar_u1_controls_create(mixer);
2309                 if (err < 0)
2310                         goto _error;
2311         }
2312
2313         err = snd_device_new(chip->card, SNDRV_DEV_LOWLEVEL, mixer, &dev_ops);
2314         if (err < 0)
2315                 goto _error;
2316
2317         if (list_empty(&chip->mixer_list) &&
2318             !snd_card_proc_new(chip->card, "usbmixer", &entry))
2319                 snd_info_set_text_ops(entry, chip, snd_usb_mixer_proc_read);
2320
2321         list_add(&mixer->list, &chip->mixer_list);
2322         return 0;
2323
2324 _error:
2325         snd_usb_mixer_free(mixer);
2326         return err;
2327 }
2328
2329 void snd_usb_mixer_disconnect(struct list_head *p)
2330 {
2331         struct usb_mixer_interface *mixer;
2332
2333         mixer = list_entry(p, struct usb_mixer_interface, list);
2334         usb_kill_urb(mixer->urb);
2335         usb_kill_urb(mixer->rc_urb);
2336 }