1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 *   Tascam US-16x08 ALSA driver
   4 *
   5 *   Copyright (c) 2016 by Detlef Urban (onkel@paraair.de)
   6 */
   7
   8#include <linux/slab.h>
   9#include <linux/usb.h>
  10#include <linux/usb/audio-v2.h>
  11
  12#include <sound/core.h>
  13#include <sound/control.h>
  14
  15#include "usbaudio.h"
  16#include "mixer.h"
  17#include "helper.h"
  18
  19#include "mixer_us16x08.h"
  20
  21/* USB control message templates */
  22static const char route_msg[] = {
  23	0x61,
  24	0x02,
  25	0x03, /* input from master (0x02) or input from computer bus (0x03) */
  26	0x62,
  27	0x02,
  28	0x01, /* input index (0x01/0x02 eq. left/right) or bus (0x01-0x08) */
  29	0x41,
  30	0x01,
  31	0x61,
  32	0x02,
  33	0x01,
  34	0x62,
  35	0x02,
  36	0x01, /* output index (0x01-0x08) */
  37	0x42,
  38	0x01,
  39	0x43,
  40	0x01,
  41	0x00,
  42	0x00
  43};
  44
  45static const char mix_init_msg1[] = {
  46	0x71, 0x01, 0x00, 0x00
  47};
  48
  49static const char mix_init_msg2[] = {
  50	0x62, 0x02, 0x00, 0x61, 0x02, 0x04, 0xb1, 0x01, 0x00, 0x00
  51};
  52
  53static const char mix_msg_in[] = {
  54	/* default message head, equal to all mixers */
  55	0x61, 0x02, 0x04, 0x62, 0x02, 0x01,
  56	0x81, /* 0x06: Controller ID */
  57	0x02, /* 0x07:  */
  58	0x00, /* 0x08: Value of common mixer */
  59	0x00,
  60	0x00
  61};
  62
  63static const char mix_msg_out[] = {
  64	/* default message head, equal to all mixers */
  65	0x61, 0x02, 0x02, 0x62, 0x02, 0x01,
  66	0x81, /* 0x06: Controller ID */
  67	0x02, /*                    0x07:  */
  68	0x00, /*                    0x08: Value of common mixer */
  69	0x00,
  70	0x00
  71};
  72
  73static const char bypass_msg_out[] = {
  74	0x45,
  75	0x02,
  76	0x01, /* on/off flag */
  77	0x00,
  78	0x00
  79};
  80
  81static const char bus_msg_out[] = {
  82	0x44,
  83	0x02,
  84	0x01, /* on/off flag */
  85	0x00,
  86	0x00
  87};
  88
  89static const char comp_msg[] = {
  90	/* default message head, equal to all mixers */
  91	0x61, 0x02, 0x04, 0x62, 0x02, 0x01,
  92	0x91,
  93	0x02,
  94	0xf0, /* 0x08: Threshold db (8) (e0 ... 00) (+-0dB -- -32dB) x-32 */
  95	0x92,
  96	0x02,
  97	0x0a, /* 0x0b: Ratio (0a,0b,0d,0f,11,14,19,1e,23,28,32,3c,50,a0,ff)  */
  98	0x93,
  99	0x02,
 100	0x02, /* 0x0e: Attack (0x02 ... 0xc0) (2ms ... 200ms) */
 101	0x94,
 102	0x02,
 103	0x01, /* 0x11: Release (0x01 ... 0x64) (10ms ... 1000ms) x*10  */
 104	0x95,
 105	0x02,
 106	0x03, /* 0x14: gain (0 ... 20) (0dB .. 20dB) */
 107	0x96,
 108	0x02,
 109	0x01,
 110	0x97,
 111	0x02,
 112	0x01, /* 0x1a: main Comp switch (0 ... 1) (off ... on)) */
 113	0x00,
 114	0x00
 115};
 116
 117static const char eqs_msq[] = {
 118	/* default message head, equal to all mixers */
 119	0x61, 0x02, 0x04, 0x62, 0x02, 0x01,
 120	0x51, /*                0x06: Controller ID  */
 121	0x02,
 122	0x04, /* 0x08: EQ set num (0x01..0x04) (LOW, LOWMID, HIGHMID, HIGH)) */
 123	0x52,
 124	0x02,
 125	0x0c, /* 0x0b: value dB (0 ... 12) (-12db .. +12db)  x-6 */
 126	0x53,
 127	0x02,
 128	0x0f, /* 0x0e: value freq (32-47) (1.7kHz..18kHz) */
 129	0x54,
 130	0x02,
 131	0x02, /* 0x11: band width (0-6) (Q16-Q0.25)  2^x/4 (EQ xxMID only) */
 132	0x55,
 133	0x02,
 134	0x01, /* 0x14: main EQ switch (0 ... 1) (off ... on)) */
 135	0x00,
 136	0x00
 137};
 138
 139/* compressor ratio map */
 140static const char ratio_map[] = {
 141	0x0a, 0x0b, 0x0d, 0x0f, 0x11, 0x14, 0x19, 0x1e,
 142	0x23, 0x28, 0x32, 0x3c, 0x50, 0xa0, 0xff
 143};
 144
 145/* route enumeration names */
 146static const char *const route_names[] = {
 147	"Master Left", "Master Right", "Output 1", "Output 2", "Output 3",
 148	"Output 4", "Output 5", "Output 6", "Output 7", "Output 8",
 149};
 150
 151static int snd_us16x08_recv_urb(struct snd_usb_audio *chip,
 152	unsigned char *buf, int size)
 153{
 154
 155	mutex_lock(&chip->mutex);
 156	snd_usb_ctl_msg(chip->dev,
 157		usb_rcvctrlpipe(chip->dev, 0),
 158		SND_US16X08_URB_METER_REQUEST,
 159		SND_US16X08_URB_METER_REQUESTTYPE, 0, 0, buf, size);
 160	mutex_unlock(&chip->mutex);
 161	return 0;
 162}
 163
 164/* wrapper function to send prepared URB buffer to usb device. Return an error
 165 * code if something went wrong
 166 */
 167static int snd_us16x08_send_urb(struct snd_usb_audio *chip, char *buf, int size)
 168{
 169	return snd_usb_ctl_msg(chip->dev, usb_sndctrlpipe(chip->dev, 0),
 170			SND_US16X08_URB_REQUEST, SND_US16X08_URB_REQUESTTYPE,
 171			0, 0, buf, size);
 172}
 173
 174static int snd_us16x08_route_info(struct snd_kcontrol *kcontrol,
 175	struct snd_ctl_elem_info *uinfo)
 176{
 177	return snd_ctl_enum_info(uinfo, 1, 10, route_names);
 178}
 179
 180static int snd_us16x08_route_get(struct snd_kcontrol *kcontrol,
 181	struct snd_ctl_elem_value *ucontrol)
 182{
 183	struct usb_mixer_elem_info *elem = kcontrol->private_data;
 184	int index = ucontrol->id.index;
 185
 186	/* route has no bias */
 187	ucontrol->value.enumerated.item[0] = elem->cache_val[index];
 188
 189	return 0;
 190}
 191
 192static int snd_us16x08_route_put(struct snd_kcontrol *kcontrol,
 193	struct snd_ctl_elem_value *ucontrol)
 194{
 195	struct usb_mixer_elem_info *elem = kcontrol->private_data;
 196	struct snd_usb_audio *chip = elem->head.mixer->chip;
 197	int index = ucontrol->id.index;
 198	char buf[sizeof(route_msg)];
 199	int val, val_org, err;
 200
 201	/*  get the new value (no bias for routes) */
 202	val = ucontrol->value.enumerated.item[0];
 203
 204	/* sanity check */
 205	if (val < 0 || val > 9)
 206		return -EINVAL;
 207
 208	/* prepare the message buffer from template */
 209	memcpy(buf, route_msg, sizeof(route_msg));
 210
 211	if (val < 2) {
 212		/* input comes from a master channel */
 213		val_org = val;
 214		buf[2] = 0x02;
 215	} else {
 216		/* input comes from a computer channel */
 217		buf[2] = 0x03;
 218		val_org = val - 2;
 219	}
 220
 221	/* place new route selection in URB message */
 222	buf[5] = (unsigned char) (val_org & 0x0f) + 1;
 223	/* place route selector in URB message */
 224	buf[13] = index + 1;
 225
 226	err = snd_us16x08_send_urb(chip, buf, sizeof(route_msg));
 227
 228	if (err > 0) {
 229		elem->cached |= 1 << index;
 230		elem->cache_val[index] = val;
 231	} else {
 232		usb_audio_dbg(chip, "Failed to set routing, err:%d\n", err);
 233	}
 234
 235	return err > 0 ? 1 : 0;
 236}
 237
 238static int snd_us16x08_master_info(struct snd_kcontrol *kcontrol,
 239	struct snd_ctl_elem_info *uinfo)
 240{
 241	uinfo->count = 1;
 242	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 243	uinfo->value.integer.max = SND_US16X08_KCMAX(kcontrol);
 244	uinfo->value.integer.min = SND_US16X08_KCMIN(kcontrol);
 245	uinfo->value.integer.step = SND_US16X08_KCSTEP(kcontrol);
 246	return 0;
 247}
 248
 249static int snd_us16x08_master_get(struct snd_kcontrol *kcontrol,
 250	struct snd_ctl_elem_value *ucontrol)
 251{
 252	struct usb_mixer_elem_info *elem = kcontrol->private_data;
 253	int index = ucontrol->id.index;
 254
 255	ucontrol->value.integer.value[0] = elem->cache_val[index];
 256
 257	return 0;
 258}
 259
 260static int snd_us16x08_master_put(struct snd_kcontrol *kcontrol,
 261	struct snd_ctl_elem_value *ucontrol)
 262{
 263	struct usb_mixer_elem_info *elem = kcontrol->private_data;
 264	struct snd_usb_audio *chip = elem->head.mixer->chip;
 265	char buf[sizeof(mix_msg_out)];
 266	int val, err;
 267	int index = ucontrol->id.index;
 268
 269	/* new control value incl. bias*/
 270	val = ucontrol->value.integer.value[0];
 271
 272	/* sanity check */
 273	if (val < SND_US16X08_KCMIN(kcontrol)
 274		|| val > SND_US16X08_KCMAX(kcontrol))
 275		return -EINVAL;
 276
 277	/* prepare the message buffer from template */
 278	memcpy(buf, mix_msg_out, sizeof(mix_msg_out));
 279
 280	buf[8] = val - SND_US16X08_KCBIAS(kcontrol);
 281	buf[6] = elem->head.id;
 282
 283	/* place channel selector in URB message */
 284	buf[5] = index + 1;
 285	err = snd_us16x08_send_urb(chip, buf, sizeof(mix_msg_out));
 286
 287	if (err > 0) {
 288		elem->cached |= 1 << index;
 289		elem->cache_val[index] = val;
 290	} else {
 291		usb_audio_dbg(chip, "Failed to set master, err:%d\n", err);
 292	}
 293
 294	return err > 0 ? 1 : 0;
 295}
 296
 297static int snd_us16x08_bus_put(struct snd_kcontrol *kcontrol,
 298	struct snd_ctl_elem_value *ucontrol)
 299{
 300	struct usb_mixer_elem_info *elem = kcontrol->private_data;
 301	struct snd_usb_audio *chip = elem->head.mixer->chip;
 302	char buf[sizeof(mix_msg_out)];
 303	int val, err = 0;
 304
 305	val = ucontrol->value.integer.value[0];
 306
 307	/* prepare the message buffer from template */
 308	switch (elem->head.id) {
 309	case SND_US16X08_ID_BYPASS:
 310		memcpy(buf, bypass_msg_out, sizeof(bypass_msg_out));
 311		buf[2] = val;
 312		err = snd_us16x08_send_urb(chip, buf, sizeof(bypass_msg_out));
 313		break;
 314	case SND_US16X08_ID_BUSS_OUT:
 315		memcpy(buf, bus_msg_out, sizeof(bus_msg_out));
 316		buf[2] = val;
 317		err = snd_us16x08_send_urb(chip, buf, sizeof(bus_msg_out));
 318		break;
 319	case SND_US16X08_ID_MUTE:
 320		memcpy(buf, mix_msg_out, sizeof(mix_msg_out));
 321		buf[8] = val;
 322		buf[6] = elem->head.id;
 323		buf[5] = 1;
 324		err = snd_us16x08_send_urb(chip, buf, sizeof(mix_msg_out));
 325		break;
 326	}
 327
 328	if (err > 0) {
 329		elem->cached |= 1;
 330		elem->cache_val[0] = val;
 331	} else {
 332		usb_audio_dbg(chip, "Failed to set bus parameter, err:%d\n", err);
 333	}
 334
 335	return err > 0 ? 1 : 0;
 336}
 337
 338static int snd_us16x08_bus_get(struct snd_kcontrol *kcontrol,
 339	struct snd_ctl_elem_value *ucontrol)
 340{
 341	struct usb_mixer_elem_info *elem = kcontrol->private_data;
 342
 343	switch (elem->head.id) {
 344	case SND_US16X08_ID_BUSS_OUT:
 345		ucontrol->value.integer.value[0] = elem->cache_val[0];
 346		break;
 347	case SND_US16X08_ID_BYPASS:
 348		ucontrol->value.integer.value[0] = elem->cache_val[0];
 349		break;
 350	case SND_US16X08_ID_MUTE:
 351		ucontrol->value.integer.value[0] = elem->cache_val[0];
 352		break;
 353	}
 354
 355	return 0;
 356}
 357
 358/* gets a current mixer value from common store */
 359static int snd_us16x08_channel_get(struct snd_kcontrol *kcontrol,
 360	struct snd_ctl_elem_value *ucontrol)
 361{
 362	struct usb_mixer_elem_info *elem = kcontrol->private_data;
 363	int index = ucontrol->id.index;
 364
 365	ucontrol->value.integer.value[0] = elem->cache_val[index];
 366
 367	return 0;
 368}
 369
 370static int snd_us16x08_channel_put(struct snd_kcontrol *kcontrol,
 371	struct snd_ctl_elem_value *ucontrol)
 372{
 373	struct usb_mixer_elem_info *elem = kcontrol->private_data;
 374	struct snd_usb_audio *chip = elem->head.mixer->chip;
 375	char buf[sizeof(mix_msg_in)];
 376	int val, err;
 377	int index = ucontrol->id.index;
 378
 379	val = ucontrol->value.integer.value[0];
 380
 381	/* sanity check */
 382	if (val < SND_US16X08_KCMIN(kcontrol)
 383		|| val > SND_US16X08_KCMAX(kcontrol))
 384		return -EINVAL;
 385
 386	/* prepare URB message from template */
 387	memcpy(buf, mix_msg_in, sizeof(mix_msg_in));
 388
 389	/* add the bias to the new value */
 390	buf[8] = val - SND_US16X08_KCBIAS(kcontrol);
 391	buf[6] = elem->head.id;
 392	buf[5] = index + 1;
 393
 394	err = snd_us16x08_send_urb(chip, buf, sizeof(mix_msg_in));
 395
 396	if (err > 0) {
 397		elem->cached |= 1 << index;
 398		elem->cache_val[index] = val;
 399	} else {
 400		usb_audio_dbg(chip, "Failed to set channel, err:%d\n", err);
 401	}
 402
 403	return err > 0 ? 1 : 0;
 404}
 405
 406static int snd_us16x08_mix_info(struct snd_kcontrol *kcontrol,
 407	struct snd_ctl_elem_info *uinfo)
 408{
 409	uinfo->count = 1;
 410	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 411	uinfo->value.integer.max = SND_US16X08_KCMAX(kcontrol);
 412	uinfo->value.integer.min = SND_US16X08_KCMIN(kcontrol);
 413	uinfo->value.integer.step = SND_US16X08_KCSTEP(kcontrol);
 414	return 0;
 415}
 416
 417static int snd_us16x08_comp_get(struct snd_kcontrol *kcontrol,
 418	struct snd_ctl_elem_value *ucontrol)
 419{
 420	struct usb_mixer_elem_info *elem = kcontrol->private_data;
 421	struct snd_us16x08_comp_store *store = elem->private_data;
 422	int index = ucontrol->id.index;
 423	int val_idx = COMP_STORE_IDX(elem->head.id);
 424
 425	ucontrol->value.integer.value[0] = store->val[val_idx][index];
 426
 427	return 0;
 428}
 429
 430static int snd_us16x08_comp_put(struct snd_kcontrol *kcontrol,
 431	struct snd_ctl_elem_value *ucontrol)
 432{
 433	struct usb_mixer_elem_info *elem = kcontrol->private_data;
 434	struct snd_usb_audio *chip = elem->head.mixer->chip;
 435	struct snd_us16x08_comp_store *store = elem->private_data;
 436	int index = ucontrol->id.index;
 437	char buf[sizeof(comp_msg)];
 438	int val_idx, val;
 439	int err;
 440
 441	val = ucontrol->value.integer.value[0];
 442
 443	/* sanity check */
 444	if (val < SND_US16X08_KCMIN(kcontrol)
 445		|| val > SND_US16X08_KCMAX(kcontrol))
 446		return -EINVAL;
 447
 448	/* new control value incl. bias*/
 449	val_idx = elem->head.id - SND_US16X08_ID_COMP_BASE;
 450
 451	store->val[val_idx][index] = ucontrol->value.integer.value[0];
 452
 453	/* prepare compressor URB message from template  */
 454	memcpy(buf, comp_msg, sizeof(comp_msg));
 455
 456	/* place comp values in message buffer watch bias! */
 457	buf[8] = store->val[
 458		COMP_STORE_IDX(SND_US16X08_ID_COMP_THRESHOLD)][index]
 459		- SND_US16X08_COMP_THRESHOLD_BIAS;
 460	buf[11] = ratio_map[store->val[
 461		COMP_STORE_IDX(SND_US16X08_ID_COMP_RATIO)][index]];
 462	buf[14] = store->val[COMP_STORE_IDX(SND_US16X08_ID_COMP_ATTACK)][index]
 463		+ SND_US16X08_COMP_ATTACK_BIAS;
 464	buf[17] = store->val[COMP_STORE_IDX(SND_US16X08_ID_COMP_RELEASE)][index]
 465		+ SND_US16X08_COMP_RELEASE_BIAS;
 466	buf[20] = store->val[COMP_STORE_IDX(SND_US16X08_ID_COMP_GAIN)][index];
 467	buf[26] = store->val[COMP_STORE_IDX(SND_US16X08_ID_COMP_SWITCH)][index];
 468
 469	/* place channel selector in message buffer */
 470	buf[5] = index + 1;
 471
 472	err = snd_us16x08_send_urb(chip, buf, sizeof(comp_msg));
 473
 474	if (err > 0) {
 475		elem->cached |= 1 << index;
 476		elem->cache_val[index] = val;
 477	} else {
 478		usb_audio_dbg(chip, "Failed to set compressor, err:%d\n", err);
 479	}
 480
 481	return 1;
 482}
 483
 484static int snd_us16x08_eqswitch_get(struct snd_kcontrol *kcontrol,
 485	struct snd_ctl_elem_value *ucontrol)
 486{
 487	int val;
 488	struct usb_mixer_elem_info *elem = kcontrol->private_data;
 489	struct snd_us16x08_eq_store *store = elem->private_data;
 490	int index = ucontrol->id.index;
 491
 492	/* get low switch from cache is enough, cause all bands are together */
 493	val = store->val[EQ_STORE_BAND_IDX(elem->head.id)]
 494		[EQ_STORE_PARAM_IDX(elem->head.id)][index];
 495	ucontrol->value.integer.value[0] = val;
 496
 497	return 0;
 498}
 499
 500static int snd_us16x08_eqswitch_put(struct snd_kcontrol *kcontrol,
 501	struct snd_ctl_elem_value *ucontrol)
 502{
 503	struct usb_mixer_elem_info *elem = kcontrol->private_data;
 504	struct snd_usb_audio *chip = elem->head.mixer->chip;
 505	struct snd_us16x08_eq_store *store = elem->private_data;
 506	int index = ucontrol->id.index;
 507	char buf[sizeof(eqs_msq)];
 508	int val, err = 0;
 509	int b_idx;
 510
 511	/* new control value incl. bias*/
 512	val = ucontrol->value.integer.value[0] + SND_US16X08_KCBIAS(kcontrol);
 513
 514	/* prepare URB message from EQ template */
 515	memcpy(buf, eqs_msq, sizeof(eqs_msq));
 516
 517	/* place channel index in URB message */
 518	buf[5] = index + 1;
 519	for (b_idx = 0; b_idx < SND_US16X08_ID_EQ_BAND_COUNT; b_idx++) {
 520		/* all four EQ bands have to be enabled/disabled in once */
 521		buf[20] = val;
 522		buf[17] = store->val[b_idx][2][index];
 523		buf[14] = store->val[b_idx][1][index];
 524		buf[11] = store->val[b_idx][0][index];
 525		buf[8] = b_idx + 1;
 526		err = snd_us16x08_send_urb(chip, buf, sizeof(eqs_msq));
 527		if (err < 0)
 528			break;
 529		store->val[b_idx][3][index] = val;
 530		msleep(15);
 531	}
 532
 533	if (err > 0) {
 534		elem->cached |= 1 << index;
 535		elem->cache_val[index] = val;
 536	} else {
 537		usb_audio_dbg(chip, "Failed to set eq switch, err:%d\n", err);
 538	}
 539
 540	return 1;
 541}
 542
 543static int snd_us16x08_eq_get(struct snd_kcontrol *kcontrol,
 544	struct snd_ctl_elem_value *ucontrol)
 545{
 546	int val;
 547	struct usb_mixer_elem_info *elem = kcontrol->private_data;
 548	struct snd_us16x08_eq_store *store = elem->private_data;
 549	int index = ucontrol->id.index;
 550	int b_idx = EQ_STORE_BAND_IDX(elem->head.id) - 1;
 551	int p_idx = EQ_STORE_PARAM_IDX(elem->head.id);
 552
 553	val = store->val[b_idx][p_idx][index];
 554
 555	ucontrol->value.integer.value[0] = val;
 556
 557	return 0;
 558}
 559
 560static int snd_us16x08_eq_put(struct snd_kcontrol *kcontrol,
 561	struct snd_ctl_elem_value *ucontrol)
 562{
 563	struct usb_mixer_elem_info *elem = kcontrol->private_data;
 564	struct snd_usb_audio *chip = elem->head.mixer->chip;
 565	struct snd_us16x08_eq_store *store = elem->private_data;
 566	int index = ucontrol->id.index;
 567	char buf[sizeof(eqs_msq)];
 568	int val, err;
 569	int b_idx = EQ_STORE_BAND_IDX(elem->head.id) - 1;
 570	int p_idx = EQ_STORE_PARAM_IDX(elem->head.id);
 571
 572	val = ucontrol->value.integer.value[0];
 573
 574	/* sanity check */
 575	if (val < SND_US16X08_KCMIN(kcontrol)
 576		|| val > SND_US16X08_KCMAX(kcontrol))
 577		return -EINVAL;
 578
 579	/* copy URB buffer from EQ template */
 580	memcpy(buf, eqs_msq, sizeof(eqs_msq));
 581
 582	store->val[b_idx][p_idx][index] = val;
 583	buf[20] = store->val[b_idx][3][index];
 584	buf[17] = store->val[b_idx][2][index];
 585	buf[14] = store->val[b_idx][1][index];
 586	buf[11] = store->val[b_idx][0][index];
 587
 588	/* place channel index in URB buffer */
 589	buf[5] = index + 1;
 590
 591	/* place EQ band in URB buffer */
 592	buf[8] = b_idx + 1;
 593
 594	err = snd_us16x08_send_urb(chip, buf, sizeof(eqs_msq));
 595
 596	if (err > 0) {
 597		/* store new value in EQ band cache */
 598		elem->cached |= 1 << index;
 599		elem->cache_val[index] = val;
 600	} else {
 601		usb_audio_dbg(chip, "Failed to set eq param, err:%d\n", err);
 602	}
 603
 604	return 1;
 605}
 606
 607static int snd_us16x08_meter_info(struct snd_kcontrol *kcontrol,
 608	struct snd_ctl_elem_info *uinfo)
 609{
 610	uinfo->count = 34;
 611	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 612	uinfo->value.integer.max = 0x7FFF;
 613	uinfo->value.integer.min = 0;
 614
 615	return 0;
 616}
 617
 618/* calculate compressor index for reduction level request */
 619static int snd_get_meter_comp_index(struct snd_us16x08_meter_store *store)
 620{
 621	int ret;
 622
 623	/* any channel active */
 624	if (store->comp_active_index) {
 625		/* check for stereo link */
 626		if (store->comp_active_index & 0x20) {
 627			/* reset comp_index to left channel*/
 628			if (store->comp_index -
 629				store->comp_active_index > 1)
 630				store->comp_index =
 631				store->comp_active_index;
 632
 633			ret = store->comp_index++ & 0x1F;
 634		} else {
 635			/* no stereo link */
 636			ret = store->comp_active_index;
 637		}
 638	} else {
 639		/* skip channels with no compressor active */
 640		while (store->comp_index <= SND_US16X08_MAX_CHANNELS
 641			&& !store->comp_store->val[
 642			COMP_STORE_IDX(SND_US16X08_ID_COMP_SWITCH)]
 643			[store->comp_index - 1]) {
 644			store->comp_index++;
 645		}
 646		ret = store->comp_index++;
 647		if (store->comp_index > SND_US16X08_MAX_CHANNELS)
 648			store->comp_index = 1;
 649	}
 650	return ret;
 651}
 652
 653/* retrieve the meter level values from URB message */
 654static void get_meter_levels_from_urb(int s,
 655	struct snd_us16x08_meter_store *store,
 656	u8 *meter_urb)
 657{
 658	int val = MUC2(meter_urb, s) + (MUC3(meter_urb, s) << 8);
 659
 660	if (MUA0(meter_urb, s) == 0x61 && MUA1(meter_urb, s) == 0x02 &&
 661		MUA2(meter_urb, s) == 0x04 && MUB0(meter_urb, s) == 0x62) {
 662		if (MUC0(meter_urb, s) == 0x72)
 663			store->meter_level[MUB2(meter_urb, s) - 1] = val;
 664		if (MUC0(meter_urb, s) == 0xb2)
 665			store->comp_level[MUB2(meter_urb, s) - 1] = val;
 666	}
 667	if (MUA0(meter_urb, s) == 0x61 && MUA1(meter_urb, s) == 0x02 &&
 668		MUA2(meter_urb, s) == 0x02 && MUB0(meter_urb, s) == 0x62)
 669		store->master_level[MUB2(meter_urb, s) - 1] = val;
 670}
 671
 672/* Function to retrieve current meter values from the device.
 673 *
 674 * The device needs to be polled for meter values with an initial
 675 * requests. It will return with a sequence of different meter value
 676 * packages. The first request (case 0:) initiate this meter response sequence.
 677 * After the third response, an additional request can be placed,
 678 * to retrieve compressor reduction level value for given channel. This round
 679 * trip channel selector will skip all inactive compressors.
 680 * A mixer can interrupt this round-trip by selecting one ore two (stereo-link)
 681 * specific channels.
 682 */
 683static int snd_us16x08_meter_get(struct snd_kcontrol *kcontrol,
 684	struct snd_ctl_elem_value *ucontrol)
 685{
 686	int i, set;
 687	struct usb_mixer_elem_info *elem = kcontrol->private_data;
 688	struct snd_usb_audio *chip = elem->head.mixer->chip;
 689	struct snd_us16x08_meter_store *store = elem->private_data;
 690	u8 meter_urb[64] = {0};
 691
 692	switch (kcontrol->private_value) {
 693	case 0: {
 694		char tmp[sizeof(mix_init_msg1)];
 695
 696		memcpy(tmp, mix_init_msg1, sizeof(mix_init_msg1));
 697		snd_us16x08_send_urb(chip, tmp, 4);
 698		snd_us16x08_recv_urb(chip, meter_urb,
 699			sizeof(meter_urb));
 700		kcontrol->private_value++;
 701		break;
 702	}
 703	case 1:
 704		snd_us16x08_recv_urb(chip, meter_urb,
 705			sizeof(meter_urb));
 706		kcontrol->private_value++;
 707		break;
 708	case 2:
 709		snd_us16x08_recv_urb(chip, meter_urb,
 710			sizeof(meter_urb));
 711		kcontrol->private_value++;
 712		break;
 713	case 3: {
 714		char tmp[sizeof(mix_init_msg2)];
 715
 716		memcpy(tmp, mix_init_msg2, sizeof(mix_init_msg2));
 717		tmp[2] = snd_get_meter_comp_index(store);
 718		snd_us16x08_send_urb(chip, tmp, 10);
 719		snd_us16x08_recv_urb(chip, meter_urb,
 720			sizeof(meter_urb));
 721		kcontrol->private_value = 0;
 722		break;
 723	}
 724	}
 725
 726	for (set = 0; set < 6; set++)
 727		get_meter_levels_from_urb(set, store, meter_urb);
 728
 729	for (i = 0; i < SND_US16X08_MAX_CHANNELS; i++) {
 730		ucontrol->value.integer.value[i] =
 731			store ? store->meter_level[i] : 0;
 732	}
 733
 734	ucontrol->value.integer.value[i++] = store ? store->master_level[0] : 0;
 735	ucontrol->value.integer.value[i++] = store ? store->master_level[1] : 0;
 736
 737	for (i = 2; i < SND_US16X08_MAX_CHANNELS + 2; i++)
 738		ucontrol->value.integer.value[i + SND_US16X08_MAX_CHANNELS] =
 739		store ? store->comp_level[i - 2] : 0;
 740
 741	return 1;
 742}
 743
 744static int snd_us16x08_meter_put(struct snd_kcontrol *kcontrol,
 745	struct snd_ctl_elem_value *ucontrol)
 746{
 747	struct usb_mixer_elem_info *elem = kcontrol->private_data;
 748	struct snd_us16x08_meter_store *store = elem->private_data;
 749	int val;
 750
 751	val = ucontrol->value.integer.value[0];
 752
 753	/* sanity check */
 754	if (val < 0 || val >= SND_US16X08_MAX_CHANNELS)
 755		return -EINVAL;
 756
 757	store->comp_active_index = val;
 758	store->comp_index = val;
 759
 760	return 1;
 761}
 762
 763static const struct snd_kcontrol_new snd_us16x08_ch_boolean_ctl = {
 764	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 765	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 766	.count = 16,
 767	.info = snd_us16x08_switch_info,
 768	.get = snd_us16x08_channel_get,
 769	.put = snd_us16x08_channel_put,
 770	.private_value = SND_US16X08_KCSET(SND_US16X08_NO_BIAS, 1, 0, 1)
 771};
 772
 773static const struct snd_kcontrol_new snd_us16x08_ch_int_ctl = {
 774	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 775	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 776	.count = 16,
 777	.info = snd_us16x08_mix_info,
 778	.get = snd_us16x08_channel_get,
 779	.put = snd_us16x08_channel_put,
 780	.private_value = SND_US16X08_KCSET(SND_US16X08_FADER_BIAS, 1, 0, 133)
 781};
 782
 783static const struct snd_kcontrol_new snd_us16x08_pan_int_ctl = {
 784	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 785	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 786	.count = 16,
 787	.info = snd_us16x08_mix_info,
 788	.get = snd_us16x08_channel_get,
 789	.put = snd_us16x08_channel_put,
 790	.private_value = SND_US16X08_KCSET(SND_US16X08_FADER_BIAS, 1, 0, 255)
 791};
 792
 793static const struct snd_kcontrol_new snd_us16x08_master_ctl = {
 794	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 795	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 796	.count = 1,
 797	.info = snd_us16x08_master_info,
 798	.get = snd_us16x08_master_get,
 799	.put = snd_us16x08_master_put,
 800	.private_value = SND_US16X08_KCSET(SND_US16X08_FADER_BIAS, 1, 0, 133)
 801};
 802
 803static const struct snd_kcontrol_new snd_us16x08_route_ctl = {
 804	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 805	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 806	.count = 8,
 807	.info = snd_us16x08_route_info,
 808	.get = snd_us16x08_route_get,
 809	.put = snd_us16x08_route_put,
 810	.private_value = SND_US16X08_KCSET(SND_US16X08_NO_BIAS, 1, 0, 9)
 811};
 812
 813static const struct snd_kcontrol_new snd_us16x08_bus_ctl = {
 814	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 815	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 816	.count = 1,
 817	.info = snd_us16x08_switch_info,
 818	.get = snd_us16x08_bus_get,
 819	.put = snd_us16x08_bus_put,
 820	.private_value = SND_US16X08_KCSET(SND_US16X08_NO_BIAS, 1, 0, 1)
 821};
 822
 823static const struct snd_kcontrol_new snd_us16x08_compswitch_ctl = {
 824	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 825	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 826	.count = 16,
 827	.info = snd_us16x08_switch_info,
 828	.get = snd_us16x08_comp_get,
 829	.put = snd_us16x08_comp_put,
 830	.private_value = SND_US16X08_KCSET(SND_US16X08_NO_BIAS, 1, 0, 1)
 831};
 832
 833static const struct snd_kcontrol_new snd_us16x08_comp_threshold_ctl = {
 834	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 835	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 836	.count = 16,
 837	.info = snd_us16x08_mix_info,
 838	.get = snd_us16x08_comp_get,
 839	.put = snd_us16x08_comp_put,
 840	.private_value = SND_US16X08_KCSET(SND_US16X08_COMP_THRESHOLD_BIAS, 1,
 841	0, 0x20)
 842};
 843
 844static const struct snd_kcontrol_new snd_us16x08_comp_ratio_ctl = {
 845	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 846	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 847	.count = 16,
 848	.info = snd_us16x08_mix_info,
 849	.get = snd_us16x08_comp_get,
 850	.put = snd_us16x08_comp_put,
 851	.private_value = SND_US16X08_KCSET(SND_US16X08_NO_BIAS, 1, 0,
 852	sizeof(ratio_map) - 1), /*max*/
 853};
 854
 855static const struct snd_kcontrol_new snd_us16x08_comp_gain_ctl = {
 856	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 857	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 858	.count = 16,
 859	.info = snd_us16x08_mix_info,
 860	.get = snd_us16x08_comp_get,
 861	.put = snd_us16x08_comp_put,
 862	.private_value = SND_US16X08_KCSET(SND_US16X08_NO_BIAS, 1, 0, 0x14)
 863};
 864
 865static const struct snd_kcontrol_new snd_us16x08_comp_attack_ctl = {
 866	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 867	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 868	.count = 16,
 869	.info = snd_us16x08_mix_info,
 870	.get = snd_us16x08_comp_get,
 871	.put = snd_us16x08_comp_put,
 872	.private_value =
 873	SND_US16X08_KCSET(SND_US16X08_COMP_ATTACK_BIAS, 1, 0, 0xc6),
 874};
 875
 876static const struct snd_kcontrol_new snd_us16x08_comp_release_ctl = {
 877	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 878	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 879	.count = 16,
 880	.info = snd_us16x08_mix_info,
 881	.get = snd_us16x08_comp_get,
 882	.put = snd_us16x08_comp_put,
 883	.private_value =
 884	SND_US16X08_KCSET(SND_US16X08_COMP_RELEASE_BIAS, 1, 0, 0x63),
 885};
 886
 887static const struct snd_kcontrol_new snd_us16x08_eq_gain_ctl = {
 888	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 889	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 890	.count = 16,
 891	.info = snd_us16x08_mix_info,
 892	.get = snd_us16x08_eq_get,
 893	.put = snd_us16x08_eq_put,
 894	.private_value = SND_US16X08_KCSET(SND_US16X08_NO_BIAS, 1, 0, 24),
 895};
 896
 897static const struct snd_kcontrol_new snd_us16x08_eq_low_freq_ctl = {
 898	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 899	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 900	.count = 16,
 901	.info = snd_us16x08_mix_info,
 902	.get = snd_us16x08_eq_get,
 903	.put = snd_us16x08_eq_put,
 904	.private_value = SND_US16X08_KCSET(SND_US16X08_NO_BIAS, 1, 0, 0x1F),
 905};
 906
 907static const struct snd_kcontrol_new snd_us16x08_eq_mid_freq_ctl = {
 908	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 909	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 910	.count = 16,
 911	.info = snd_us16x08_mix_info,
 912	.get = snd_us16x08_eq_get,
 913	.put = snd_us16x08_eq_put,
 914	.private_value = SND_US16X08_KCSET(SND_US16X08_NO_BIAS, 1, 0, 0x3F)
 915};
 916
 917static const struct snd_kcontrol_new snd_us16x08_eq_mid_width_ctl = {
 918	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 919	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 920	.count = 16,
 921	.info = snd_us16x08_mix_info,
 922	.get = snd_us16x08_eq_get,
 923	.put = snd_us16x08_eq_put,
 924	.private_value = SND_US16X08_KCSET(SND_US16X08_NO_BIAS, 1, 0, 0x06)
 925};
 926
 927static const struct snd_kcontrol_new snd_us16x08_eq_high_freq_ctl = {
 928	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 929	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 930	.count = 16,
 931	.info = snd_us16x08_mix_info,
 932	.get = snd_us16x08_eq_get,
 933	.put = snd_us16x08_eq_put,
 934	.private_value =
 935	SND_US16X08_KCSET(SND_US16X08_EQ_HIGHFREQ_BIAS, 1, 0, 0x1F)
 936};
 937
 938static const struct snd_kcontrol_new snd_us16x08_eq_switch_ctl = {
 939	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 940	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 941	.count = 16,
 942	.info = snd_us16x08_switch_info,
 943	.get = snd_us16x08_eqswitch_get,
 944	.put = snd_us16x08_eqswitch_put,
 945	.private_value = SND_US16X08_KCSET(SND_US16X08_NO_BIAS, 1, 0, 1)
 946};
 947
 948static const struct snd_kcontrol_new snd_us16x08_meter_ctl = {
 949	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 950	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 951	.count = 1,
 952	.info = snd_us16x08_meter_info,
 953	.get = snd_us16x08_meter_get,
 954	.put = snd_us16x08_meter_put
 955};
 956
 957/* control store preparation */
 958
 959/* setup compressor store and assign default value */
 960static struct snd_us16x08_comp_store *snd_us16x08_create_comp_store(void)
 961{
 962	int i;
 963	struct snd_us16x08_comp_store *tmp;
 964
 965	tmp = kmalloc(sizeof(*tmp), GFP_KERNEL);
 966	if (!tmp)
 967		return NULL;
 968
 969	for (i = 0; i < SND_US16X08_MAX_CHANNELS; i++) {
 970		tmp->val[COMP_STORE_IDX(SND_US16X08_ID_COMP_THRESHOLD)][i]
 971			= 0x20;
 972		tmp->val[COMP_STORE_IDX(SND_US16X08_ID_COMP_RATIO)][i] = 0x00;
 973		tmp->val[COMP_STORE_IDX(SND_US16X08_ID_COMP_GAIN)][i] = 0x00;
 974		tmp->val[COMP_STORE_IDX(SND_US16X08_ID_COMP_SWITCH)][i] = 0x00;
 975		tmp->val[COMP_STORE_IDX(SND_US16X08_ID_COMP_ATTACK)][i] = 0x00;
 976		tmp->val[COMP_STORE_IDX(SND_US16X08_ID_COMP_RELEASE)][i] = 0x00;
 977	}
 978	return tmp;
 979}
 980
 981/* setup EQ store and assign default values */
 982static struct snd_us16x08_eq_store *snd_us16x08_create_eq_store(void)
 983{
 984	int i, b_idx;
 985	struct snd_us16x08_eq_store *tmp;
 986
 987	tmp = kmalloc(sizeof(*tmp), GFP_KERNEL);
 988	if (!tmp)
 989		return NULL;
 990
 991	for (i = 0; i < SND_US16X08_MAX_CHANNELS; i++) {
 992		for (b_idx = 0; b_idx < SND_US16X08_ID_EQ_BAND_COUNT; b_idx++) {
 993			tmp->val[b_idx][0][i] = 0x0c;
 994			tmp->val[b_idx][3][i] = 0x00;
 995			switch (b_idx) {
 996			case 0: /* EQ Low */
 997				tmp->val[b_idx][1][i] = 0x05;
 998				tmp->val[b_idx][2][i] = 0xff;
 999				break;
1000			case 1: /* EQ Mid low */
1001				tmp->val[b_idx][1][i] = 0x0e;
1002				tmp->val[b_idx][2][i] = 0x02;
1003				break;
1004			case 2: /* EQ Mid High */
1005				tmp->val[b_idx][1][i] = 0x1b;
1006				tmp->val[b_idx][2][i] = 0x02;
1007				break;
1008			case 3: /* EQ High */
1009				tmp->val[b_idx][1][i] = 0x2f
1010					- SND_US16X08_EQ_HIGHFREQ_BIAS;
1011				tmp->val[b_idx][2][i] = 0xff;
1012				break;
1013			}
1014		}
1015	}
1016	return tmp;
1017}
1018
1019static struct snd_us16x08_meter_store *snd_us16x08_create_meter_store(void)
1020{
1021	struct snd_us16x08_meter_store *tmp;
1022
1023	tmp = kzalloc(sizeof(*tmp), GFP_KERNEL);
1024	if (!tmp)
1025		return NULL;
1026	tmp->comp_index = 1;
1027	tmp->comp_active_index = 0;
1028	return tmp;
1029}
1030
1031/* release elem->private_free as well; called only once for each *_store */
1032static void elem_private_free(struct snd_kcontrol *kctl)
1033{
1034	struct usb_mixer_elem_info *elem = kctl->private_data;
1035
1036	if (elem)
1037		kfree(elem->private_data);
1038	kfree(elem);
1039	kctl->private_data = NULL;
1040}
1041
1042static int add_new_ctl(struct usb_mixer_interface *mixer,
1043	const struct snd_kcontrol_new *ncontrol,
1044	int index, int val_type, int channels,
1045	const char *name, void *opt,
1046	bool do_private_free,
1047	struct usb_mixer_elem_info **elem_ret)
1048{
1049	struct snd_kcontrol *kctl;
1050	struct usb_mixer_elem_info *elem;
1051	int err;
1052
1053	usb_audio_dbg(mixer->chip, "us16x08 add mixer %s\n", name);
1054
1055	elem = kzalloc(sizeof(*elem), GFP_KERNEL);
1056	if (!elem)
1057		return -ENOMEM;
1058
1059	elem->head.mixer = mixer;
1060	elem->head.resume = NULL;
1061	elem->control = 0;
1062	elem->idx_off = 0;
1063	elem->head.id = index;
1064	elem->val_type = val_type;
1065	elem->channels = channels;
1066	elem->private_data = opt;
1067
1068	kctl = snd_ctl_new1(ncontrol, elem);
1069	if (!kctl) {
1070		kfree(elem);
1071		return -ENOMEM;
1072	}
1073
1074	if (do_private_free)
1075		kctl->private_free = elem_private_free;
1076	else
1077		kctl->private_free = snd_usb_mixer_elem_free;
1078
1079	strscpy(kctl->id.name, name, sizeof(kctl->id.name));
1080
1081	err = snd_usb_mixer_add_control(&elem->head, kctl);
1082	if (err < 0)
1083		return err;
1084
1085	if (elem_ret)
1086		*elem_ret = elem;
1087
1088	return 0;
1089}
1090
1091/* table of EQ controls */
1092static const struct snd_us16x08_control_params eq_controls[] = {
1093	{ /* EQ switch */
1094		.kcontrol_new = &snd_us16x08_eq_switch_ctl,
1095		.control_id = SND_US16X08_ID_EQENABLE,
1096		.type = USB_MIXER_BOOLEAN,
1097		.num_channels = 16,
1098		.name = "EQ Switch",
1099	},
1100	{ /* EQ low gain */
1101		.kcontrol_new = &snd_us16x08_eq_gain_ctl,
1102		.control_id = SND_US16X08_ID_EQLOWLEVEL,
1103		.type = USB_MIXER_U8,
1104		.num_channels = 16,
1105		.name = "EQ Low Volume",
1106	},
1107	{ /* EQ low freq */
1108		.kcontrol_new = &snd_us16x08_eq_low_freq_ctl,
1109		.control_id = SND_US16X08_ID_EQLOWFREQ,
1110		.type = USB_MIXER_U8,
1111		.num_channels = 16,
1112		.name = "EQ Low Frequency",
1113	},
1114	{ /* EQ mid low gain */
1115		.kcontrol_new = &snd_us16x08_eq_gain_ctl,
1116		.control_id = SND_US16X08_ID_EQLOWMIDLEVEL,
1117		.type = USB_MIXER_U8,
1118		.num_channels = 16,
1119		.name = "EQ MidLow Volume",
1120	},
1121	{ /* EQ mid low freq */
1122		.kcontrol_new = &snd_us16x08_eq_mid_freq_ctl,
1123		.control_id = SND_US16X08_ID_EQLOWMIDFREQ,
1124		.type = USB_MIXER_U8,
1125		.num_channels = 16,
1126		.name = "EQ MidLow Frequency",
1127	},
1128	{ /* EQ mid low Q */
1129		.kcontrol_new = &snd_us16x08_eq_mid_width_ctl,
1130		.control_id = SND_US16X08_ID_EQLOWMIDWIDTH,
1131		.type = USB_MIXER_U8,
1132		.num_channels = 16,
1133		.name = "EQ MidLow Q",
1134	},
1135	{ /* EQ mid high gain */
1136		.kcontrol_new = &snd_us16x08_eq_gain_ctl,
1137		.control_id = SND_US16X08_ID_EQHIGHMIDLEVEL,
1138		.type = USB_MIXER_U8,
1139		.num_channels = 16,
1140		.name = "EQ MidHigh Volume",
1141	},
1142	{ /* EQ mid high freq */
1143		.kcontrol_new = &snd_us16x08_eq_mid_freq_ctl,
1144		.control_id = SND_US16X08_ID_EQHIGHMIDFREQ,
1145		.type = USB_MIXER_U8,
1146		.num_channels = 16,
1147		.name = "EQ MidHigh Frequency",
1148	},
1149	{ /* EQ mid high Q */
1150		.kcontrol_new = &snd_us16x08_eq_mid_width_ctl,
1151		.control_id = SND_US16X08_ID_EQHIGHMIDWIDTH,
1152		.type = USB_MIXER_U8,
1153		.num_channels = 16,
1154		.name = "EQ MidHigh Q",
1155	},
1156	{ /* EQ high gain */
1157		.kcontrol_new = &snd_us16x08_eq_gain_ctl,
1158		.control_id = SND_US16X08_ID_EQHIGHLEVEL,
1159		.type = USB_MIXER_U8,
1160		.num_channels = 16,
1161		.name = "EQ High Volume",
1162	},
1163	{ /* EQ low freq */
1164		.kcontrol_new = &snd_us16x08_eq_high_freq_ctl,
1165		.control_id = SND_US16X08_ID_EQHIGHFREQ,
1166		.type = USB_MIXER_U8,
1167		.num_channels = 16,
1168		.name = "EQ High Frequency",
1169	},
1170};
1171
1172/* table of compressor controls */
1173static const struct snd_us16x08_control_params comp_controls[] = {
1174	{ /* Comp enable */
1175		.kcontrol_new = &snd_us16x08_compswitch_ctl,
1176		.control_id = SND_US16X08_ID_COMP_SWITCH,
1177		.type = USB_MIXER_BOOLEAN,
1178		.num_channels = 16,
1179		.name = "Compressor Switch",
1180	},
1181	{ /* Comp threshold */
1182		.kcontrol_new = &snd_us16x08_comp_threshold_ctl,
1183		.control_id = SND_US16X08_ID_COMP_THRESHOLD,
1184		.type = USB_MIXER_U8,
1185		.num_channels = 16,
1186		.name = "Compressor Threshold Volume",
1187	},
1188	{ /* Comp ratio */
1189		.kcontrol_new = &snd_us16x08_comp_ratio_ctl,
1190		.control_id = SND_US16X08_ID_COMP_RATIO,
1191		.type = USB_MIXER_U8,
1192		.num_channels = 16,
1193		.name = "Compressor Ratio",
1194	},
1195	{ /* Comp attack */
1196		.kcontrol_new = &snd_us16x08_comp_attack_ctl,
1197		.control_id = SND_US16X08_ID_COMP_ATTACK,
1198		.type = USB_MIXER_U8,
1199		.num_channels = 16,
1200		.name = "Compressor Attack",
1201	},
1202	{ /* Comp release */
1203		.kcontrol_new = &snd_us16x08_comp_release_ctl,
1204		.control_id = SND_US16X08_ID_COMP_RELEASE,
1205		.type = USB_MIXER_U8,
1206		.num_channels = 16,
1207		.name = "Compressor Release",
1208	},
1209	{ /* Comp gain */
1210		.kcontrol_new = &snd_us16x08_comp_gain_ctl,
1211		.control_id = SND_US16X08_ID_COMP_GAIN,
1212		.type = USB_MIXER_U8,
1213		.num_channels = 16,
1214		.name = "Compressor Volume",
1215	},
1216};
1217
1218/* table of channel controls */
1219static const struct snd_us16x08_control_params channel_controls[] = {
1220	{ /* Phase */
1221		.kcontrol_new = &snd_us16x08_ch_boolean_ctl,
1222		.control_id = SND_US16X08_ID_PHASE,
1223		.type = USB_MIXER_BOOLEAN,
1224		.num_channels = 16,
1225		.name = "Phase Switch",
1226		.default_val = 0
1227	},
1228	{ /* Fader */
1229		.kcontrol_new = &snd_us16x08_ch_int_ctl,
1230		.control_id = SND_US16X08_ID_FADER,
1231		.type = USB_MIXER_U8,
1232		.num_channels = 16,
1233		.name = "Line Volume",
1234		.default_val = 127
1235	},
1236	{ /* Mute */
1237		.kcontrol_new = &snd_us16x08_ch_boolean_ctl,
1238		.control_id = SND_US16X08_ID_MUTE,
1239		.type = USB_MIXER_BOOLEAN,
1240		.num_channels = 16,
1241		.name = "Mute Switch",
1242		.default_val = 0
1243	},
1244	{ /* Pan */
1245		.kcontrol_new = &snd_us16x08_pan_int_ctl,
1246		.control_id = SND_US16X08_ID_PAN,
1247		.type = USB_MIXER_U16,
1248		.num_channels = 16,
1249		.name = "Pan Left-Right Volume",
1250		.default_val = 127
1251	},
1252};
1253
1254/* table of master controls */
1255static const struct snd_us16x08_control_params master_controls[] = {
1256	{ /* Master */
1257		.kcontrol_new = &snd_us16x08_master_ctl,
1258		.control_id = SND_US16X08_ID_FADER,
1259		.type = USB_MIXER_U8,
1260		.num_channels = 16,
1261		.name = "Master Volume",
1262		.default_val = 127
1263	},
1264	{ /* Bypass */
1265		.kcontrol_new = &snd_us16x08_bus_ctl,
1266		.control_id = SND_US16X08_ID_BYPASS,
1267		.type = USB_MIXER_BOOLEAN,
1268		.num_channels = 16,
1269		.name = "DSP Bypass Switch",
1270		.default_val = 0
1271	},
1272	{ /* Buss out */
1273		.kcontrol_new = &snd_us16x08_bus_ctl,
1274		.control_id = SND_US16X08_ID_BUSS_OUT,
1275		.type = USB_MIXER_BOOLEAN,
1276		.num_channels = 16,
1277		.name = "Buss Out Switch",
1278		.default_val = 0
1279	},
1280	{ /* Master mute */
1281		.kcontrol_new = &snd_us16x08_bus_ctl,
1282		.control_id = SND_US16X08_ID_MUTE,
1283		.type = USB_MIXER_BOOLEAN,
1284		.num_channels = 16,
1285		.name = "Master Mute Switch",
1286		.default_val = 0
1287	},
1288
1289};
1290
1291int snd_us16x08_controls_create(struct usb_mixer_interface *mixer)
1292{
1293	int i, j;
1294	int err;
1295	struct usb_mixer_elem_info *elem;
1296	struct snd_us16x08_comp_store *comp_store;
1297	struct snd_us16x08_meter_store *meter_store;
1298	struct snd_us16x08_eq_store *eq_store;
1299
1300	/* just check for non-MIDI interface */
1301	if (mixer->hostif->desc.bInterfaceNumber == 3) {
1302
1303		/* add routing control */
1304		err = add_new_ctl(mixer, &snd_us16x08_route_ctl,
1305			SND_US16X08_ID_ROUTE, USB_MIXER_U8, 8, "Line Out Route",
1306			NULL, false, &elem);
1307		if (err < 0) {
1308			usb_audio_dbg(mixer->chip,
1309				"Failed to create route control, err:%d\n",
1310				err);
1311			return err;
1312		}
1313		for (i = 0; i < 8; i++)
1314			elem->cache_val[i] = i < 2 ? i : i + 2;
1315		elem->cached = 0xff;
1316
1317		/* create compressor mixer elements */
1318		comp_store = snd_us16x08_create_comp_store();
1319		if (!comp_store)
1320			return -ENOMEM;
1321
1322		/* add master controls */
1323		for (i = 0; i < ARRAY_SIZE(master_controls); i++) {
1324
1325			err = add_new_ctl(mixer,
1326				master_controls[i].kcontrol_new,
1327				master_controls[i].control_id,
1328				master_controls[i].type,
1329				master_controls[i].num_channels,
1330				master_controls[i].name,
1331				comp_store,
1332				i == 0, /* release comp_store only once */
1333				&elem);
1334			if (err < 0)
1335				return err;
1336			elem->cache_val[0] = master_controls[i].default_val;
1337			elem->cached = 1;
1338		}
1339
1340		/* add channel controls */
1341		for (i = 0; i < ARRAY_SIZE(channel_controls); i++) {
1342
1343			err = add_new_ctl(mixer,
1344				channel_controls[i].kcontrol_new,
1345				channel_controls[i].control_id,
1346				channel_controls[i].type,
1347				channel_controls[i].num_channels,
1348				channel_controls[i].name,
1349				comp_store,
1350				false, &elem);
1351			if (err < 0)
1352				return err;
1353			for (j = 0; j < SND_US16X08_MAX_CHANNELS; j++) {
1354				elem->cache_val[j] =
1355					channel_controls[i].default_val;
1356			}
1357			elem->cached = 0xffff;
1358		}
1359
1360		/* create eq store */
1361		eq_store = snd_us16x08_create_eq_store();
1362		if (!eq_store)
1363			return -ENOMEM;
1364
1365		/* add EQ controls */
1366		for (i = 0; i < ARRAY_SIZE(eq_controls); i++) {
1367
1368			err = add_new_ctl(mixer,
1369				eq_controls[i].kcontrol_new,
1370				eq_controls[i].control_id,
1371				eq_controls[i].type,
1372				eq_controls[i].num_channels,
1373				eq_controls[i].name,
1374				eq_store,
1375				i == 0, /* release eq_store only once */
1376				NULL);
1377			if (err < 0)
1378				return err;
1379		}
1380
1381		/* add compressor controls */
1382		for (i = 0; i < ARRAY_SIZE(comp_controls); i++) {
1383
1384			err = add_new_ctl(mixer,
1385				comp_controls[i].kcontrol_new,
1386				comp_controls[i].control_id,
1387				comp_controls[i].type,
1388				comp_controls[i].num_channels,
1389				comp_controls[i].name,
1390				comp_store,
1391				false, NULL);
1392			if (err < 0)
1393				return err;
1394		}
1395
1396		/* create meters store */
1397		meter_store = snd_us16x08_create_meter_store();
1398		if (!meter_store)
1399			return -ENOMEM;
1400
1401		/* meter function 'get' must access to compressor store
1402		 * so place a reference here
1403		 */
1404		meter_store->comp_store = comp_store;
1405		err = add_new_ctl(mixer, &snd_us16x08_meter_ctl,
1406			SND_US16X08_ID_METER, USB_MIXER_U16, 0, "Level Meter",
1407			meter_store, true, NULL);
1408		if (err < 0)
1409			return err;
1410	}
1411
1412	return 0;
1413}
1414