target/linux/brcm2708/patches-4.19/950-0076-Add-support-for-Allo-Piano-DAC-2.1-plus-add-on-board.patch

   1 From 13ecb19ca5c74eab30e3299e5ac0bd7691fe2ad4 Mon Sep 17 00:00:00 2001
   2 From: Raashid Muhammed <raashidmuhammed@zilogic.com>
   3 Date: Mon, 27 Mar 2017 12:35:00 +0530
   4 Subject: [PATCH 076/773] Add support for Allo Piano DAC 2.1 plus add-on board
   5  for Raspberry Pi.
   6
   7 The Piano DAC 2.1 has support for 4 channels with subwoofer.
   8
   9 Signed-off-by: Baswaraj K <jaikumar@cem-solutions.net>
  10 Reviewed-by: Vijay Kumar B. <vijaykumar@zilogic.com>
  11 Reviewed-by: Raashid Muhammed <raashidmuhammed@zilogic.com>
  12
  13 Add clock changes and mute gpios (#1938)
  14
  15 Also improve code style and adhere to ALSA coding conventions.
  16
  17 Signed-off-by: Baswaraj K <jaikumar@cem-solutions.net>
  18 Reviewed-by: Vijay Kumar B. <vijaykumar@zilogic.com>
  19 Reviewed-by: Raashid Muhammed <raashidmuhammed@zilogic.com>
  20
  21 PianoPlus: Dual Mono & Dual Stereo features added (#2069)
  22
  23 allo-piano-dac-plus: Master volume added + fixes
  24
  25 Master volume added, which controls both DACs volumes.
  26
  27 See: https://github.com/raspberrypi/linux/pull/2149
  28
  29 Also fix initial max volume, default mode value, and unmute.
  30
  31 Signed-off-by: allocom <sparky-dev@allo.com>
  32
  33 ASoC: allo-piano-dac-plus: fix S24_LE format
  34
  35 Remove set_bclk_ratio call so 24-bit data is transmitted in
  36 24 bclk cycles.
  37
  38 Signed-off-by: Matthias Reichl <hias@horus.com>
  39 ---
  40  sound/soc/bcm/allo-piano-dac-plus.c | 1011 +++++++++++++++++++++++++++
  41  1 file changed, 1011 insertions(+)
  42  create mode 100644 sound/soc/bcm/allo-piano-dac-plus.c
  43
  44 --- /dev/null
  45 +++ b/sound/soc/bcm/allo-piano-dac-plus.c
  46 @@ -0,0 +1,1011 @@
  47 +/*
  48 + * ALSA ASoC Machine Driver for Allo Piano DAC Plus Subwoofer
  49 + *
  50 + * Author:     Baswaraj K <jaikumar@cem-solutions.net>
  51 + *             Copyright 2016
  52 + *             based on code by Daniel Matuschek <info@crazy-audio.com>
  53 + *             based on code by Florian Meier <florian.meier@koalo.de>
  54 + *
  55 + * This program is free software; you can redistribute it and/or
  56 + * modify it under the terms of the GNU General Public License
  57 + * version 2 as published by the Free Software Foundation.
  58 + *
  59 + * This program is distributed in the hope that it will be useful, but
  60 + * WITHOUT ANY WARRANTY; without even the implied warranty of
  61 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  62 + * General Public License for more details.
  63 + */
  64 +
  65 +#include <linux/module.h>
  66 +#include <linux/platform_device.h>
  67 +#include <linux/gpio/consumer.h>
  68 +#include <sound/core.h>
  69 +#include <sound/pcm.h>
  70 +#include <sound/pcm_params.h>
  71 +#include <sound/soc.h>
  72 +#include <linux/firmware.h>
  73 +#include <linux/delay.h>
  74 +#include <sound/tlv.h>
  75 +#include "../codecs/pcm512x.h"
  76 +
  77 +#define P_DAC_LEFT_MUTE                0x10
  78 +#define P_DAC_RIGHT_MUTE       0x01
  79 +#define P_DAC_MUTE             0x11
  80 +#define P_DAC_UNMUTE           0x00
  81 +#define P_MUTE                 1
  82 +#define P_UNMUTE               0
  83 +
  84 +struct dsp_code {
  85 +       char i2c_addr;
  86 +       char offset;
  87 +       char val;
  88 +};
  89 +
  90 +struct glb_pool {
  91 +       struct mutex lock;
  92 +       unsigned int dual_mode;
  93 +       unsigned int set_lowpass;
  94 +       unsigned int set_mode;
  95 +       unsigned int set_rate;
  96 +       unsigned int dsp_page_number;
  97 +};
  98 +
  99 +static bool digital_gain_0db_limit = true;
 100 +bool glb_mclk;
 101 +
 102 +static struct gpio_desc *mute_gpio[2];
 103 +
 104 +static const char * const allo_piano_mode_texts[] = {
 105 +       "None",
 106 +       "2.0",
 107 +       "2.1",
 108 +       "2.2",
 109 +};
 110 +
 111 +static const SOC_ENUM_SINGLE_DECL(allo_piano_mode_enum,
 112 +               0, 0, allo_piano_mode_texts);
 113 +
 114 +static const char * const allo_piano_dual_mode_texts[] = {
 115 +       "None",
 116 +       "Dual-Mono",
 117 +       "Dual-Stereo",
 118 +};
 119 +
 120 +static const SOC_ENUM_SINGLE_DECL(allo_piano_dual_mode_enum,
 121 +               0, 0, allo_piano_dual_mode_texts);
 122 +
 123 +static const char * const allo_piano_dsp_low_pass_texts[] = {
 124 +       "60",
 125 +       "70",
 126 +       "80",
 127 +       "90",
 128 +       "100",
 129 +       "110",
 130 +       "120",
 131 +       "130",
 132 +       "140",
 133 +       "150",
 134 +       "160",
 135 +       "170",
 136 +       "180",
 137 +       "190",
 138 +       "200",
 139 +};
 140 +
 141 +static const SOC_ENUM_SINGLE_DECL(allo_piano_enum,
 142 +               0, 0, allo_piano_dsp_low_pass_texts);
 143 +
 144 +static int __snd_allo_piano_dsp_program(struct snd_soc_pcm_runtime *rtd,
 145 +               unsigned int mode, unsigned int rate, unsigned int lowpass)
 146 +{
 147 +       const struct firmware *fw;
 148 +       struct snd_soc_card *card = rtd->card;
 149 +       struct glb_pool *glb_ptr = card->drvdata;
 150 +       char firmware_name[60];
 151 +       int ret = 0, dac = 0;
 152 +
 153 +       if (rate <= 46000)
 154 +               rate = 44100;
 155 +       else if (rate <= 68000)
 156 +               rate = 48000;
 157 +       else if (rate <= 92000)
 158 +               rate = 88200;
 159 +       else if (rate <= 136000)
 160 +               rate = 96000;
 161 +       else if (rate <= 184000)
 162 +               rate = 176400;
 163 +       else
 164 +               rate = 192000;
 165 +
 166 +       if (lowpass > 14)
 167 +               glb_ptr->set_lowpass = lowpass = 0;
 168 +
 169 +       if (mode > 3)
 170 +               glb_ptr->set_mode = mode = 0;
 171 +
 172 +       if (mode > 0)
 173 +               glb_ptr->dual_mode = 0;
 174 +
 175 +       /* same configuration loaded */
 176 +       if ((rate == glb_ptr->set_rate) && (lowpass == glb_ptr->set_lowpass)
 177 +                       && (mode == glb_ptr->set_mode))
 178 +               return 0;
 179 +
 180 +       switch (mode) {
 181 +       case 0: /* None */
 182 +               return 1;
 183 +
 184 +       case 1: /* 2.0 */
 185 +               snd_soc_component_write(rtd->codec_dais[0]->component,
 186 +                               PCM512x_MUTE, P_DAC_UNMUTE);
 187 +               snd_soc_component_write(rtd->codec_dais[1]->component,
 188 +                               PCM512x_MUTE, P_DAC_MUTE);
 189 +               glb_ptr->set_rate = rate;
 190 +               glb_ptr->set_mode = mode;
 191 +               glb_ptr->set_lowpass = lowpass;
 192 +               return 1;
 193 +
 194 +       default:
 195 +               snd_soc_component_write(rtd->codec_dais[0]->component,
 196 +                               PCM512x_MUTE, P_DAC_UNMUTE);
 197 +               snd_soc_component_write(rtd->codec_dais[1]->component,
 198 +                               PCM512x_MUTE, P_DAC_UNMUTE);
 199 +       }
 200 +
 201 +       for (dac = 0; dac < rtd->num_codecs; dac++) {
 202 +               struct dsp_code *dsp_code_read;
 203 +               int i = 1;
 204 +
 205 +               if (dac == 0) { /* high */
 206 +                       snprintf(firmware_name, sizeof(firmware_name),
 207 +                               "allo/piano/2.2/allo-piano-dsp-%d-%d-%d.bin",
 208 +                               rate, ((lowpass * 10) + 60), dac);
 209 +               } else { /* low */
 210 +                       snprintf(firmware_name, sizeof(firmware_name),
 211 +                               "allo/piano/2.%d/allo-piano-dsp-%d-%d-%d.bin",
 212 +                               (mode - 1), rate, ((lowpass * 10) + 60), dac);
 213 +               }
 214 +
 215 +               dev_info(rtd->card->dev, "Dsp Firmware File Name: %s\n",
 216 +                               firmware_name);
 217 +
 218 +               ret = request_firmware(&fw, firmware_name, rtd->card->dev);
 219 +               if (ret < 0) {
 220 +                       dev_err(rtd->card->dev,
 221 +                               "Error: Allo Piano Firmware %s missing. %d\n",
 222 +                               firmware_name, ret);
 223 +                       goto err;
 224 +               }
 225 +
 226 +               while (i < (fw->size - 1)) {
 227 +                       dsp_code_read = (struct dsp_code *)&fw->data[i];
 228 +
 229 +                       if (dsp_code_read->offset == 0) {
 230 +                               glb_ptr->dsp_page_number = dsp_code_read->val;
 231 +                               ret = snd_soc_component_write(rtd->codec_dais[dac]->component,
 232 +                                               PCM512x_PAGE_BASE(0),
 233 +                                               dsp_code_read->val);
 234 +
 235 +                       } else if (dsp_code_read->offset != 0) {
 236 +                               ret = snd_soc_component_write(rtd->codec_dais[dac]->component,
 237 +                                       (PCM512x_PAGE_BASE(
 238 +                                               glb_ptr->dsp_page_number) +
 239 +                                       dsp_code_read->offset),
 240 +                                       dsp_code_read->val);
 241 +                       }
 242 +                       if (ret < 0) {
 243 +                               dev_err(rtd->card->dev,
 244 +                                       "Failed to write Register: %d\n", ret);
 245 +                               release_firmware(fw);
 246 +                               goto err;
 247 +                       }
 248 +                       i = i + 3;
 249 +               }
 250 +               release_firmware(fw);
 251 +       }
 252 +       glb_ptr->set_rate = rate;
 253 +       glb_ptr->set_mode = mode;
 254 +       glb_ptr->set_lowpass = lowpass;
 255 +       return 1;
 256 +
 257 +err:
 258 +       return ret;
 259 +}
 260 +
 261 +static int snd_allo_piano_dsp_program(struct snd_soc_pcm_runtime *rtd,
 262 +               unsigned int mode, unsigned int rate, unsigned int lowpass)
 263 +{
 264 +       struct snd_soc_card *card = rtd->card;
 265 +       struct glb_pool *glb_ptr = card->drvdata;
 266 +       int ret = 0;
 267 +
 268 +       mutex_lock(&glb_ptr->lock);
 269 +
 270 +       ret = __snd_allo_piano_dsp_program(rtd, mode, rate, lowpass);
 271 +
 272 +       mutex_unlock(&glb_ptr->lock);
 273 +
 274 +       return ret;
 275 +}
 276 +
 277 +static int snd_allo_piano_dual_mode_get(struct snd_kcontrol *kcontrol,
 278 +               struct snd_ctl_elem_value *ucontrol)
 279 +{
 280 +       struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
 281 +       struct glb_pool *glb_ptr = card->drvdata;
 282 +
 283 +       ucontrol->value.integer.value[0] = glb_ptr->dual_mode;
 284 +
 285 +       return 0;
 286 +}
 287 +
 288 +static int snd_allo_piano_dual_mode_put(struct snd_kcontrol *kcontrol,
 289 +               struct snd_ctl_elem_value *ucontrol)
 290 +{
 291 +       struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
 292 +       struct glb_pool *glb_ptr = card->drvdata;
 293 +       struct snd_soc_pcm_runtime *rtd;
 294 +       struct snd_card *snd_card_ptr = card->snd_card;
 295 +       struct snd_kcontrol *kctl;
 296 +       struct soc_mixer_control *mc;
 297 +       unsigned int left_val = 0, right_val = 0;
 298 +
 299 +       rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name);
 300 +
 301 +       if (ucontrol->value.integer.value[0] > 0) {
 302 +               glb_ptr->dual_mode = ucontrol->value.integer.value[0];
 303 +               glb_ptr->set_mode = 0;
 304 +       } else {
 305 +               if (glb_ptr->set_mode <= 0) {
 306 +                       glb_ptr->dual_mode = 1;
 307 +                       glb_ptr->set_mode = 0;
 308 +               } else {
 309 +                       glb_ptr->dual_mode = 0;
 310 +                       return 0;
 311 +               }
 312 +       }
 313 +
 314 +       if (glb_ptr->dual_mode == 1) { // Dual Mono
 315 +               snd_soc_component_write(rtd->codec_dais[0]->component,
 316 +                               PCM512x_MUTE, P_DAC_RIGHT_MUTE);
 317 +               snd_soc_component_write(rtd->codec_dais[1]->component,
 318 +                               PCM512x_MUTE, P_DAC_LEFT_MUTE);
 319 +               snd_soc_component_write(rtd->codec_dais[0]->component,
 320 +                               PCM512x_DIGITAL_VOLUME_3, 0xff);
 321 +               snd_soc_component_write(rtd->codec_dais[1]->component,
 322 +                               PCM512x_DIGITAL_VOLUME_2, 0xff);
 323 +
 324 +               list_for_each_entry(kctl, &snd_card_ptr->controls, list) {
 325 +                       if (!strncmp(kctl->id.name, "Digital Playback Volume",
 326 +                                       sizeof(kctl->id.name))) {
 327 +                               mc = (struct soc_mixer_control *)
 328 +                                       kctl->private_value;
 329 +                               mc->rreg = mc->reg;
 330 +                               break;
 331 +                       }
 332 +               }
 333 +       } else {
 334 +               snd_soc_component_read(rtd->codec_dais[0]->component,
 335 +                                               PCM512x_DIGITAL_VOLUME_2, &left_val);
 336 +               snd_soc_component_read(rtd->codec_dais[1]->component,
 337 +                                               PCM512x_DIGITAL_VOLUME_3, &right_val);
 338 +
 339 +               list_for_each_entry(kctl, &snd_card_ptr->controls, list) {
 340 +                       if (!strncmp(kctl->id.name, "Digital Playback Volume",
 341 +                                       sizeof(kctl->id.name))) {
 342 +                               mc = (struct soc_mixer_control *)
 343 +                                       kctl->private_value;
 344 +                               mc->rreg = PCM512x_DIGITAL_VOLUME_3;
 345 +                               break;
 346 +                       }
 347 +               }
 348 +
 349 +               snd_soc_component_write(rtd->codec_dais[0]->component,
 350 +                               PCM512x_DIGITAL_VOLUME_3, left_val);
 351 +               snd_soc_component_write(rtd->codec_dais[1]->component,
 352 +                               PCM512x_DIGITAL_VOLUME_2, right_val);
 353 +               snd_soc_component_write(rtd->codec_dais[0]->component,
 354 +                               PCM512x_MUTE, P_DAC_UNMUTE);
 355 +               snd_soc_component_write(rtd->codec_dais[1]->component,
 356 +                               PCM512x_MUTE, P_DAC_UNMUTE);
 357 +       }
 358 +
 359 +       return 0;
 360 +}
 361 +
 362 +static int snd_allo_piano_mode_get(struct snd_kcontrol *kcontrol,
 363 +               struct snd_ctl_elem_value *ucontrol)
 364 +{
 365 +       struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
 366 +       struct glb_pool *glb_ptr = card->drvdata;
 367 +
 368 +       ucontrol->value.integer.value[0] = glb_ptr->set_mode;
 369 +       return 0;
 370 +}
 371 +
 372 +static int snd_allo_piano_mode_put(struct snd_kcontrol *kcontrol,
 373 +               struct snd_ctl_elem_value *ucontrol)
 374 +{
 375 +       struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
 376 +       struct snd_soc_pcm_runtime *rtd;
 377 +       struct glb_pool *glb_ptr = card->drvdata;
 378 +       struct snd_card *snd_card_ptr = card->snd_card;
 379 +       struct snd_kcontrol *kctl;
 380 +       struct soc_mixer_control *mc;
 381 +       unsigned int left_val = 0, right_val = 0;
 382 +
 383 +       rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name);
 384 +
 385 +       if ((glb_ptr->dual_mode == 1) &&
 386 +                       (ucontrol->value.integer.value[0] > 0)) {
 387 +               snd_soc_component_read(rtd->codec_dais[0]->component,
 388 +                                               PCM512x_DIGITAL_VOLUME_2, &left_val);
 389 +               snd_soc_component_read(rtd->codec_dais[1]->component,
 390 +                                               PCM512x_DIGITAL_VOLUME_2, &right_val);
 391 +
 392 +               list_for_each_entry(kctl, &snd_card_ptr->controls, list) {
 393 +                       if (!strncmp(kctl->id.name, "Digital Playback Volume",
 394 +                                       sizeof(kctl->id.name))) {
 395 +                               mc = (struct soc_mixer_control *)
 396 +                                       kctl->private_value;
 397 +                               mc->rreg = PCM512x_DIGITAL_VOLUME_3;
 398 +                               break;
 399 +                       }
 400 +               }
 401 +               snd_soc_component_write(rtd->codec_dais[0]->component,
 402 +                               PCM512x_DIGITAL_VOLUME_3, left_val);
 403 +               snd_soc_component_write(rtd->codec_dais[1]->component,
 404 +                               PCM512x_DIGITAL_VOLUME_3, right_val);
 405 +       }
 406 +
 407 +       return(snd_allo_piano_dsp_program(rtd,
 408 +                               ucontrol->value.integer.value[0],
 409 +                               glb_ptr->set_rate, glb_ptr->set_lowpass));
 410 +}
 411 +
 412 +static int snd_allo_piano_lowpass_get(struct snd_kcontrol *kcontrol,
 413 +               struct snd_ctl_elem_value *ucontrol)
 414 +{
 415 +       struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
 416 +       struct glb_pool *glb_ptr = card->drvdata;
 417 +
 418 +       ucontrol->value.integer.value[0] = glb_ptr->set_lowpass;
 419 +       return 0;
 420 +}
 421 +
 422 +static int snd_allo_piano_lowpass_put(struct snd_kcontrol *kcontrol,
 423 +               struct snd_ctl_elem_value *ucontrol)
 424 +{
 425 +       struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
 426 +       struct snd_soc_pcm_runtime *rtd;
 427 +       struct glb_pool *glb_ptr = card->drvdata;
 428 +
 429 +       rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name);
 430 +       return(snd_allo_piano_dsp_program(rtd,
 431 +                               glb_ptr->set_mode, glb_ptr->set_rate,
 432 +                               ucontrol->value.integer.value[0]));
 433 +}
 434 +
 435 +static int pcm512x_get_reg_sub(struct snd_kcontrol *kcontrol,
 436 +               struct snd_ctl_elem_value *ucontrol)
 437 +{
 438 +       struct soc_mixer_control *mc =
 439 +               (struct soc_mixer_control *)kcontrol->private_value;
 440 +       struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
 441 +       struct glb_pool *glb_ptr = card->drvdata;
 442 +       struct snd_soc_pcm_runtime *rtd;
 443 +       unsigned int left_val = 0;
 444 +       unsigned int right_val = 0;
 445 +       int ret;
 446 +       rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name);
 447 +       ret = snd_soc_component_read(rtd->codec_dais[1]->component,
 448 +                       PCM512x_DIGITAL_VOLUME_3, &right_val);
 449 +       if (ret < 0)
 450 +               return ret;
 451 +
 452 +       if (glb_ptr->dual_mode != 1) {
 453 +               ret = snd_soc_component_read(rtd->codec_dais[1]->component,
 454 +                               PCM512x_DIGITAL_VOLUME_2, &left_val);
 455 +               if ( ret < 0)
 456 +                       return ret;
 457 +
 458 +       } else {
 459 +               left_val = right_val;
 460 +       }
 461 +
 462 +       ucontrol->value.integer.value[0] =
 463 +                               (~(left_val >> mc->shift)) & mc->max;
 464 +       ucontrol->value.integer.value[1] =
 465 +                               (~(right_val >> mc->shift)) & mc->max;
 466 +
 467 +       return 0;
 468 +}
 469 +
 470 +static int pcm512x_set_reg_sub(struct snd_kcontrol *kcontrol,
 471 +               struct snd_ctl_elem_value *ucontrol)
 472 +{
 473 +       struct soc_mixer_control *mc =
 474 +               (struct soc_mixer_control *)kcontrol->private_value;
 475 +       struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
 476 +       struct glb_pool *glb_ptr = card->drvdata;
 477 +       struct snd_soc_pcm_runtime *rtd;
 478 +       unsigned int left_val = (ucontrol->value.integer.value[0] & mc->max);
 479 +       unsigned int right_val = (ucontrol->value.integer.value[1] & mc->max);
 480 +       int ret = 0;
 481 +
 482 +       rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name);
 483 +       if (glb_ptr->dual_mode != 1) {
 484 +               ret = snd_soc_component_write(rtd->codec_dais[1]->component,
 485 +                               PCM512x_DIGITAL_VOLUME_2, (~left_val));
 486 +               if (ret < 0)
 487 +                       return ret;
 488 +       }
 489 +
 490 +       if (digital_gain_0db_limit) {
 491 +               ret = snd_soc_limit_volume(card, "Subwoofer Playback Volume",
 492 +                                       207);
 493 +               if (ret < 0)
 494 +                       dev_warn(card->dev, "Failed to set volume limit: %d\n",
 495 +                               ret);
 496 +       }
 497 +
 498 +       ret = snd_soc_component_write(rtd->codec_dais[1]->component,
 499 +                       PCM512x_DIGITAL_VOLUME_3, (~right_val));
 500 +       if (ret < 0)
 501 +               return ret;
 502 +
 503 +       return 1;
 504 +}
 505 +
 506 +static int pcm512x_get_reg_sub_switch(struct snd_kcontrol *kcontrol,
 507 +               struct snd_ctl_elem_value *ucontrol)
 508 +{
 509 +       struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
 510 +       struct snd_soc_pcm_runtime *rtd;
 511 +       int val = 0;
 512 +       int ret;
 513 +
 514 +       rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name);
 515 +       ret = snd_soc_component_read(rtd->codec_dais[1]->component, PCM512x_MUTE, &val);
 516 +       if (ret < 0)
 517 +               return ret;
 518 +
 519 +       ucontrol->value.integer.value[0] =
 520 +                       (val & P_DAC_LEFT_MUTE) ? P_UNMUTE : P_MUTE;
 521 +       ucontrol->value.integer.value[1] =
 522 +                       (val & P_DAC_RIGHT_MUTE) ? P_UNMUTE : P_MUTE;
 523 +
 524 +       return val;
 525 +}
 526 +
 527 +static int pcm512x_set_reg_sub_switch(struct snd_kcontrol *kcontrol,
 528 +               struct snd_ctl_elem_value *ucontrol)
 529 +{
 530 +       struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
 531 +       struct snd_soc_pcm_runtime *rtd;
 532 +       struct glb_pool *glb_ptr = card->drvdata;
 533 +       unsigned int left_val = (ucontrol->value.integer.value[0]);
 534 +       unsigned int right_val = (ucontrol->value.integer.value[1]);
 535 +       int ret = 0;
 536 +
 537 +       rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name);
 538 +       if (glb_ptr->set_mode != 1) {
 539 +               ret = snd_soc_component_write(rtd->codec_dais[1]->component, PCM512x_MUTE,
 540 +                               ~((left_val & 0x01)<<4 | (right_val & 0x01)));
 541 +               if (ret < 0)
 542 +                       return ret;
 543 +       }
 544 +       return 1;
 545 +
 546 +}
 547 +
 548 +static int pcm512x_get_reg_master(struct snd_kcontrol *kcontrol,
 549 +               struct snd_ctl_elem_value *ucontrol)
 550 +{
 551 +       struct soc_mixer_control *mc =
 552 +               (struct soc_mixer_control *)kcontrol->private_value;
 553 +       struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
 554 +       struct glb_pool *glb_ptr = card->drvdata;
 555 +       struct snd_soc_pcm_runtime *rtd;
 556 +       unsigned int left_val = 0, right_val = 0;
 557 +       int ret;
 558 +
 559 +       rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name);
 560 +
 561 +       ret = snd_soc_component_read(rtd->codec_dais[0]->component,
 562 +                       PCM512x_DIGITAL_VOLUME_2, &left_val);
 563 +       if ( ret < 0)
 564 +               return ret;
 565 +
 566 +       if (glb_ptr->dual_mode == 1) {
 567 +               ret = snd_soc_component_read(rtd->codec_dais[1]->component,
 568 +                               PCM512x_DIGITAL_VOLUME_3, &right_val);
 569 +               if (ret < 0)
 570 +                       return ret;
 571 +       } else {
 572 +               ret = snd_soc_component_read(rtd->codec_dais[0]->component,
 573 +                               PCM512x_DIGITAL_VOLUME_3, &right_val);
 574 +               if (ret < 0)
 575 +                       return ret;
 576 +       }
 577 +
 578 +       ucontrol->value.integer.value[0] =
 579 +               (~(left_val  >> mc->shift)) & mc->max;
 580 +       ucontrol->value.integer.value[1] =
 581 +               (~(right_val >> mc->shift)) & mc->max;
 582 +
 583 +       return 0;
 584 +}
 585 +
 586 +static int pcm512x_set_reg_master(struct snd_kcontrol *kcontrol,
 587 +               struct snd_ctl_elem_value *ucontrol)
 588 +{
 589 +       struct soc_mixer_control *mc =
 590 +               (struct soc_mixer_control *)kcontrol->private_value;
 591 +       struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
 592 +       struct glb_pool *glb_ptr = card->drvdata;
 593 +       struct snd_soc_pcm_runtime *rtd;
 594 +       unsigned int left_val = (ucontrol->value.integer.value[0] & mc->max);
 595 +       unsigned int right_val = (ucontrol->value.integer.value[1] & mc->max);
 596 +       int ret = 0;
 597 +
 598 +       rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name);
 599 +
 600 +       if (digital_gain_0db_limit) {
 601 +               ret = snd_soc_limit_volume(card, "Master Playback Volume",
 602 +                                       207);
 603 +               if (ret < 0)
 604 +                       dev_warn(card->dev, "Failed to set volume limit: %d\n",
 605 +                               ret);
 606 +       }
 607 +
 608 +       if (glb_ptr->dual_mode != 1) {
 609 +               ret = snd_soc_component_write(rtd->codec_dais[1]->component,
 610 +                               PCM512x_DIGITAL_VOLUME_2, (~left_val));
 611 +               if (ret < 0)
 612 +                       return ret;
 613 +
 614 +               ret = snd_soc_component_write(rtd->codec_dais[0]->component,
 615 +                               PCM512x_DIGITAL_VOLUME_3, (~right_val));
 616 +               if (ret < 0)
 617 +                       return ret;
 618 +
 619 +       }
 620 +
 621 +       ret = snd_soc_component_write(rtd->codec_dais[1]->component,
 622 +                       PCM512x_DIGITAL_VOLUME_3, (~right_val));
 623 +       if (ret < 0)
 624 +               return ret;
 625 +
 626 +       ret = snd_soc_component_write(rtd->codec_dais[0]->component,
 627 +                       PCM512x_DIGITAL_VOLUME_2, (~left_val));
 628 +       if (ret < 0)
 629 +               return ret;
 630 +       return 1;
 631 +}
 632 +
 633 +static int pcm512x_get_reg_master_switch(struct snd_kcontrol *kcontrol,
 634 +               struct snd_ctl_elem_value *ucontrol)
 635 +{
 636 +       struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
 637 +       struct glb_pool *glb_ptr = card->drvdata;
 638 +       struct snd_soc_pcm_runtime *rtd;
 639 +       int val = 0;
 640 +       int ret;
 641 +
 642 +       rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name);
 643 +
 644 +       ret = snd_soc_component_read(rtd->codec_dais[0]->component, PCM512x_MUTE, &val);
 645 +       if (ret < 0)
 646 +               return ret;
 647 +
 648 +       ucontrol->value.integer.value[0] =
 649 +                       (val & P_DAC_LEFT_MUTE) ? P_UNMUTE : P_MUTE;
 650 +
 651 +       if (glb_ptr->dual_mode == 1) {
 652 +               ret = snd_soc_component_read(rtd->codec_dais[1]->component, PCM512x_MUTE, &val);
 653 +               if (ret < 0)
 654 +                       return ret;
 655 +       }
 656 +       ucontrol->value.integer.value[1] =
 657 +                       (val & P_DAC_RIGHT_MUTE) ? P_UNMUTE : P_MUTE;
 658 +
 659 +       return val;
 660 +}
 661 +
 662 +static int pcm512x_set_reg_master_switch(struct snd_kcontrol *kcontrol,
 663 +               struct snd_ctl_elem_value *ucontrol)
 664 +{
 665 +       struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
 666 +       struct snd_soc_pcm_runtime *rtd;
 667 +       struct glb_pool *glb_ptr = card->drvdata;
 668 +       unsigned int left_val = (ucontrol->value.integer.value[0]);
 669 +       unsigned int right_val = (ucontrol->value.integer.value[1]);
 670 +       int ret = 0;
 671 +
 672 +       rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name);
 673 +       if (glb_ptr->dual_mode == 1) {
 674 +               ret = snd_soc_component_write(rtd->codec_dais[0]->component, PCM512x_MUTE,
 675 +                               ~((left_val & 0x01)<<4));
 676 +               if (ret < 0)
 677 +                       return ret;
 678 +               ret = snd_soc_component_write(rtd->codec_dais[1]->component, PCM512x_MUTE,
 679 +                               ~((right_val & 0x01)));
 680 +               if (ret < 0)
 681 +                       return ret;
 682 +
 683 +       } else if (glb_ptr->set_mode == 1) {
 684 +               ret = snd_soc_component_write(rtd->codec_dais[0]->component, PCM512x_MUTE,
 685 +                               ~((left_val & 0x01)<<4 | (right_val & 0x01)));
 686 +               if (ret < 0)
 687 +                       return ret;
 688 +
 689 +       } else {
 690 +               ret = snd_soc_component_write(rtd->codec_dais[0]->component, PCM512x_MUTE,
 691 +                               ~((left_val & 0x01)<<4 | (right_val & 0x01)));
 692 +               if (ret < 0)
 693 +                       return ret;
 694 +
 695 +               ret = snd_soc_component_write(rtd->codec_dais[1]->component, PCM512x_MUTE,
 696 +                               ~((left_val & 0x01)<<4 | (right_val & 0x01)));
 697 +               if (ret < 0)
 698 +                       return ret;
 699 +       }
 700 +       return 1;
 701 +}
 702 +
 703 +static const DECLARE_TLV_DB_SCALE(digital_tlv_sub, -10350, 50, 1);
 704 +static const DECLARE_TLV_DB_SCALE(digital_tlv_master, -10350, 50, 1);
 705 +
 706 +static const struct snd_kcontrol_new allo_piano_controls[] = {
 707 +       SOC_ENUM_EXT("Subwoofer mode Route",
 708 +                       allo_piano_mode_enum,
 709 +                       snd_allo_piano_mode_get,
 710 +                       snd_allo_piano_mode_put),
 711 +
 712 +       SOC_ENUM_EXT("Dual Mode Route",
 713 +                       allo_piano_dual_mode_enum,
 714 +                       snd_allo_piano_dual_mode_get,
 715 +                       snd_allo_piano_dual_mode_put),
 716 +
 717 +       SOC_ENUM_EXT("Lowpass Route", allo_piano_enum,
 718 +                       snd_allo_piano_lowpass_get,
 719 +                       snd_allo_piano_lowpass_put),
 720 +
 721 +       SOC_DOUBLE_R_EXT_TLV("Subwoofer Playback Volume",
 722 +                       PCM512x_DIGITAL_VOLUME_2,
 723 +                       PCM512x_DIGITAL_VOLUME_3, 0, 255, 1,
 724 +                       pcm512x_get_reg_sub,
 725 +                       pcm512x_set_reg_sub,
 726 +                       digital_tlv_sub),
 727 +
 728 +       SOC_DOUBLE_EXT("Subwoofer Playback Switch",
 729 +                       PCM512x_MUTE,
 730 +                       PCM512x_RQML_SHIFT,
 731 +                       PCM512x_RQMR_SHIFT, 1, 1,
 732 +                       pcm512x_get_reg_sub_switch,
 733 +                       pcm512x_set_reg_sub_switch),
 734 +
 735 +       SOC_DOUBLE_R_EXT_TLV("Master Playback Volume",
 736 +                       PCM512x_DIGITAL_VOLUME_2,
 737 +                       PCM512x_DIGITAL_VOLUME_3, 0, 255, 1,
 738 +                       pcm512x_get_reg_master,
 739 +                       pcm512x_set_reg_master,
 740 +                       digital_tlv_master),
 741 +
 742 +       SOC_DOUBLE_EXT("Master Playback Switch",
 743 +                       PCM512x_MUTE,
 744 +                       PCM512x_RQML_SHIFT,
 745 +                       PCM512x_RQMR_SHIFT, 1, 1,
 746 +                       pcm512x_get_reg_master_switch,
 747 +                       pcm512x_set_reg_master_switch),
 748 +};
 749 +
 750 +static int snd_allo_piano_dac_init(struct snd_soc_pcm_runtime *rtd)
 751 +{
 752 +       struct snd_soc_card *card = rtd->card;
 753 +       struct glb_pool *glb_ptr;
 754 +
 755 +       glb_ptr = kmalloc(sizeof(struct glb_pool), GFP_KERNEL);
 756 +       if (!glb_ptr)
 757 +               return -ENOMEM;
 758 +
 759 +       memset(glb_ptr, 0x00, sizeof(glb_ptr));
 760 +       card->drvdata = glb_ptr;
 761 +       glb_ptr->dual_mode = 2;
 762 +       glb_ptr->set_mode = 0;
 763 +
 764 +       mutex_init(&glb_ptr->lock);
 765 +
 766 +       if (digital_gain_0db_limit) {
 767 +               int ret;
 768 +
 769 +               ret = snd_soc_limit_volume(card, "Digital Playback Volume",
 770 +                                       207);
 771 +               if (ret < 0)
 772 +                       dev_warn(card->dev, "Failed to set volume limit: %d\n",
 773 +                               ret);
 774 +       }
 775 +       return 0;
 776 +}
 777 +
 778 +static void snd_allo_piano_gpio_mute(struct snd_soc_card *card)
 779 +{
 780 +       if (mute_gpio[0])
 781 +               gpiod_set_value_cansleep(mute_gpio[0], P_MUTE);
 782 +
 783 +       if (mute_gpio[1])
 784 +               gpiod_set_value_cansleep(mute_gpio[1], P_MUTE);
 785 +}
 786 +
 787 +static void snd_allo_piano_gpio_unmute(struct snd_soc_card *card)
 788 +{
 789 +       if (mute_gpio[0])
 790 +               gpiod_set_value_cansleep(mute_gpio[0], P_UNMUTE);
 791 +
 792 +       if (mute_gpio[1])
 793 +               gpiod_set_value_cansleep(mute_gpio[1], P_UNMUTE);
 794 +}
 795 +
 796 +static int snd_allo_piano_set_bias_level(struct snd_soc_card *card,
 797 +       struct snd_soc_dapm_context *dapm, enum snd_soc_bias_level level)
 798 +{
 799 +       struct snd_soc_pcm_runtime *rtd;
 800 +       struct snd_soc_dai *codec_dai;
 801 +
 802 +       rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name);
 803 +       codec_dai = rtd->codec_dai;
 804 +
 805 +       if (dapm->dev != codec_dai->dev)
 806 +               return 0;
 807 +
 808 +       switch (level) {
 809 +       case SND_SOC_BIAS_PREPARE:
 810 +               if (dapm->bias_level != SND_SOC_BIAS_STANDBY)
 811 +                       break;
 812 +               /* UNMUTE DAC */
 813 +               snd_allo_piano_gpio_unmute(card);
 814 +               break;
 815 +
 816 +       case SND_SOC_BIAS_STANDBY:
 817 +               if (dapm->bias_level != SND_SOC_BIAS_PREPARE)
 818 +                       break;
 819 +               /* MUTE DAC */
 820 +               snd_allo_piano_gpio_mute(card);
 821 +               break;
 822 +
 823 +       default:
 824 +               break;
 825 +       }
 826 +
 827 +       return 0;
 828 +}
 829 +
 830 +static int snd_allo_piano_dac_startup(
 831 +       struct snd_pcm_substream *substream)
 832 +{
 833 +       struct snd_soc_pcm_runtime *rtd = substream->private_data;
 834 +       struct snd_soc_card *card = rtd->card;
 835 +
 836 +       snd_allo_piano_gpio_mute(card);
 837 +
 838 +       return 0;
 839 +}
 840 +
 841 +static int snd_allo_piano_dac_hw_params(
 842 +               struct snd_pcm_substream *substream,
 843 +               struct snd_pcm_hw_params *params)
 844 +{
 845 +       struct snd_soc_pcm_runtime *rtd = substream->private_data;
 846 +       unsigned int rate = params_rate(params);
 847 +       struct snd_soc_card *card = rtd->card;
 848 +       struct glb_pool *glb_ptr = card->drvdata;
 849 +       int ret = 0, val = 0, dac;
 850 +
 851 +       for (dac = 0; (glb_mclk && dac < 2); dac++) {
 852 +               /* Configure the PLL clock reference for both the Codecs */
 853 +               ret = snd_soc_component_read(rtd->codec_dais[dac]->component,
 854 +                                       PCM512x_RATE_DET_4, &val);
 855 +               if (ret < 0) {
 856 +                       dev_err(rtd->codec_dais[dac]->component->dev,
 857 +                               "Failed to read register PCM512x_RATE_DET_4\n");
 858 +                       return ret;
 859 +               }
 860 +
 861 +               if (val & 0x40) {
 862 +                       snd_soc_component_write(rtd->codec_dais[dac]->component,
 863 +                                       PCM512x_PLL_REF,
 864 +                                       PCM512x_SREF_BCK);
 865 +
 866 +                       dev_info(rtd->codec_dais[dac]->component->dev,
 867 +                               "Setting BCLK as input clock & Enable PLL\n");
 868 +               } else {
 869 +                       snd_soc_component_write(rtd->codec_dais[dac]->component,
 870 +                                       PCM512x_PLL_EN,
 871 +                                       0x00);
 872 +
 873 +                       snd_soc_component_write(rtd->codec_dais[dac]->component,
 874 +                                       PCM512x_PLL_REF,
 875 +                                       PCM512x_SREF_SCK);
 876 +
 877 +                       dev_info(rtd->codec_dais[dac]->component->dev,
 878 +                               "Setting SCLK as input clock & disabled PLL\n");
 879 +               }
 880 +       }
 881 +
 882 +       ret = snd_allo_piano_dsp_program(rtd, glb_ptr->set_mode, rate,
 883 +                                               glb_ptr->set_lowpass);
 884 +       if (ret < 0)
 885 +               return ret;
 886 +
 887 +       return ret;
 888 +}
 889 +
 890 +static int snd_allo_piano_dac_prepare(
 891 +       struct snd_pcm_substream *substream)
 892 +{
 893 +       struct snd_soc_pcm_runtime *rtd = substream->private_data;
 894 +       struct snd_soc_card *card = rtd->card;
 895 +
 896 +       snd_allo_piano_gpio_unmute(card);
 897 +
 898 +       return 0;
 899 +}
 900 +
 901 +/* machine stream operations */
 902 +static struct snd_soc_ops snd_allo_piano_dac_ops = {
 903 +       .startup = snd_allo_piano_dac_startup,
 904 +       .hw_params = snd_allo_piano_dac_hw_params,
 905 +       .prepare = snd_allo_piano_dac_prepare,
 906 +};
 907 +
 908 +static struct snd_soc_dai_link_component allo_piano_2_1_codecs[] = {
 909 +       {
 910 +               .dai_name = "pcm512x-hifi",
 911 +       },
 912 +       {
 913 +               .dai_name = "pcm512x-hifi",
 914 +       },
 915 +};
 916 +
 917 +static struct snd_soc_dai_link snd_allo_piano_dac_dai[] = {
 918 +       {
 919 +               .name           = "PianoDACPlus",
 920 +               .stream_name    = "PianoDACPlus",
 921 +               .cpu_dai_name   = "bcm2708-i2s.0",
 922 +               .platform_name  = "bcm2708-i2s.0",
 923 +               .codecs         = allo_piano_2_1_codecs,
 924 +               .num_codecs     = 2,
 925 +               .dai_fmt        = SND_SOC_DAIFMT_I2S |
 926 +                               SND_SOC_DAIFMT_NB_NF |
 927 +                               SND_SOC_DAIFMT_CBS_CFS,
 928 +               .ops            = &snd_allo_piano_dac_ops,
 929 +               .init           = snd_allo_piano_dac_init,
 930 +       },
 931 +};
 932 +
 933 +/* audio machine driver */
 934 +static struct snd_soc_card snd_allo_piano_dac = {
 935 +       .name = "PianoDACPlus",
 936 +       .owner = THIS_MODULE,
 937 +       .dai_link = snd_allo_piano_dac_dai,
 938 +       .num_links = ARRAY_SIZE(snd_allo_piano_dac_dai),
 939 +       .controls = allo_piano_controls,
 940 +       .num_controls = ARRAY_SIZE(allo_piano_controls),
 941 +};
 942 +
 943 +static int snd_allo_piano_dac_probe(struct platform_device *pdev)
 944 +{
 945 +       struct snd_soc_card *card = &snd_allo_piano_dac;
 946 +       int ret = 0, i = 0;
 947 +
 948 +       card->dev = &pdev->dev;
 949 +       platform_set_drvdata(pdev, &snd_allo_piano_dac);
 950 +
 951 +       if (pdev->dev.of_node) {
 952 +               struct device_node *i2s_node;
 953 +               struct snd_soc_dai_link *dai;
 954 +
 955 +               dai = &snd_allo_piano_dac_dai[0];
 956 +               i2s_node = of_parse_phandle(pdev->dev.of_node,
 957 +                                               "i2s-controller", 0);
 958 +               if (i2s_node) {
 959 +                       for (i = 0; i < card->num_links; i++) {
 960 +                               dai->cpu_dai_name = NULL;
 961 +                               dai->cpu_of_node = i2s_node;
 962 +                               dai->platform_name = NULL;
 963 +                               dai->platform_of_node = i2s_node;
 964 +                       }
 965 +               }
 966 +               digital_gain_0db_limit =
 967 +                       !of_property_read_bool(pdev->dev.of_node,
 968 +                                               "allo,24db_digital_gain");
 969 +
 970 +               glb_mclk = of_property_read_bool(pdev->dev.of_node,
 971 +                                               "allo,glb_mclk");
 972 +
 973 +               allo_piano_2_1_codecs[0].of_node =
 974 +                       of_parse_phandle(pdev->dev.of_node, "audio-codec", 0);
 975 +               if (!allo_piano_2_1_codecs[0].of_node) {
 976 +                       dev_err(&pdev->dev,
 977 +                               "Property 'audio-codec' missing or invalid\n");
 978 +                       return -EINVAL;
 979 +               }
 980 +
 981 +               allo_piano_2_1_codecs[1].of_node =
 982 +                       of_parse_phandle(pdev->dev.of_node, "audio-codec", 1);
 983 +               if (!allo_piano_2_1_codecs[1].of_node) {
 984 +                       dev_err(&pdev->dev,
 985 +                               "Property 'audio-codec' missing or invalid\n");
 986 +                       return -EINVAL;
 987 +               }
 988 +
 989 +               mute_gpio[0] = devm_gpiod_get_optional(&pdev->dev, "mute1",
 990 +                                                       GPIOD_OUT_LOW);
 991 +               if (IS_ERR(mute_gpio[0])) {
 992 +                       ret = PTR_ERR(mute_gpio[0]);
 993 +                       dev_err(&pdev->dev,
 994 +                               "failed to get mute1 gpio6: %d\n", ret);
 995 +                       return ret;
 996 +               }
 997 +
 998 +               mute_gpio[1] = devm_gpiod_get_optional(&pdev->dev, "mute2",
 999 +                                                       GPIOD_OUT_LOW);
1000 +               if (IS_ERR(mute_gpio[1])) {
1001 +                       ret = PTR_ERR(mute_gpio[1]);
1002 +                       dev_err(&pdev->dev,
1003 +                               "failed to get mute2 gpio25: %d\n", ret);
1004 +                       return ret;
1005 +               }
1006 +
1007 +               if (mute_gpio[0] && mute_gpio[1])
1008 +                       snd_allo_piano_dac.set_bias_level =
1009 +                               snd_allo_piano_set_bias_level;
1010 +
1011 +               ret = snd_soc_register_card(&snd_allo_piano_dac);
1012 +               if (ret < 0) {
1013 +                       dev_err(&pdev->dev,
1014 +                               "snd_soc_register_card() failed: %d\n", ret);
1015 +                       return ret;
1016 +               }
1017 +
1018 +               if ((mute_gpio[0]) && (mute_gpio[1]))
1019 +                       snd_allo_piano_gpio_mute(&snd_allo_piano_dac);
1020 +
1021 +               return 0;
1022 +       }
1023 +
1024 +       return -EINVAL;
1025 +}
1026 +
1027 +static int snd_allo_piano_dac_remove(struct platform_device *pdev)
1028 +{
1029 +       struct snd_soc_card *card = platform_get_drvdata(pdev);
1030 +
1031 +       kfree(&card->drvdata);
1032 +       snd_allo_piano_gpio_mute(&snd_allo_piano_dac);
1033 +       return snd_soc_unregister_card(&snd_allo_piano_dac);
1034 +}
1035 +
1036 +static const struct of_device_id snd_allo_piano_dac_of_match[] = {
1037 +       { .compatible = "allo,piano-dac-plus", },
1038 +       { /* sentinel */ },
1039 +};
1040 +
1041 +MODULE_DEVICE_TABLE(of, snd_allo_piano_dac_of_match);
1042 +
1043 +static struct platform_driver snd_allo_piano_dac_driver = {
1044 +       .driver = {
1045 +               .name = "snd-allo-piano-dac-plus",
1046 +               .owner = THIS_MODULE,
1047 +               .of_match_table = snd_allo_piano_dac_of_match,
1048 +       },
1049 +       .probe = snd_allo_piano_dac_probe,
1050 +       .remove = snd_allo_piano_dac_remove,
1051 +};
1052 +
1053 +module_platform_driver(snd_allo_piano_dac_driver);
1054 +
1055 +MODULE_AUTHOR("Baswaraj K <jaikumar@cem-solutions.net>");
1056 +MODULE_DESCRIPTION("ALSA ASoC Machine Driver for Allo Piano DAC Plus");
1057 +MODULE_LICENSE("GPL v2");