target/linux/brcm2708/patches-4.19/950-0309-Added-driver-for-the-HiFiBerry-DAC-ADC-2694.patch

   1 From e4b9a8f537b069bd3017f30b21bceb811263c979 Mon Sep 17 00:00:00 2001
   2 From: HiFiBerry <info@hifiberry.com>
   3 Date: Mon, 8 Oct 2018 18:10:12 +0200
   4 Subject: [PATCH 309/703] Added driver for the HiFiBerry DAC+ ADC (#2694)
   5
   6 Signed-off-by: Daniel Matuschek <daniel@hifiberry.com>
   7 ---
   8  arch/arm/boot/dts/overlays/Makefile           |   1 +
   9  arch/arm/boot/dts/overlays/README             |  21 +
  10  .../overlays/hifiberry-dacplusadc-overlay.dts |  71 +++
  11  arch/arm/configs/bcm2709_defconfig            |   1 +
  12  arch/arm/configs/bcmrpi_defconfig             |   1 +
  13  sound/soc/bcm/Kconfig                         |   8 +
  14  sound/soc/bcm/Makefile                        |   2 +
  15  sound/soc/bcm/hifiberry_dacplusadc.c          | 407 ++++++++++++++++++
  16  8 files changed, 512 insertions(+)
  17  create mode 100644 arch/arm/boot/dts/overlays/hifiberry-dacplusadc-overlay.dts
  18  create mode 100644 sound/soc/bcm/hifiberry_dacplusadc.c
  19
  20 --- a/arch/arm/boot/dts/overlays/Makefile
  21 +++ b/arch/arm/boot/dts/overlays/Makefile
  22 @@ -49,6 +49,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
  23         hifiberry-amp.dtbo \
  24         hifiberry-dac.dtbo \
  25         hifiberry-dacplus.dtbo \
  26 +       hifiberry-dacplusadc.dtbo \
  27         hifiberry-digi.dtbo \
  28         hifiberry-digi-pro.dtbo \
  29         hy28a.dtbo \
  30 --- a/arch/arm/boot/dts/overlays/README
  31 +++ b/arch/arm/boot/dts/overlays/README
  32 @@ -779,6 +779,27 @@ Params: 24db_digital_gain       Allow ga
  33                                  master for bit clock and frame clock.
  34
  35
  36 +Name:   hifiberry-dacplusadc
  37 +Info:   Configures the HifiBerry DAC+ADC audio card
  38 +Load:   dtoverlay=hifiberry-dacplusadc,<param>=<val>
  39 +Params: 24db_digital_gain       Allow gain to be applied via the PCM512x codec
  40 +                                Digital volume control. Enable with
  41 +                                "dtoverlay=hifiberry-dacplus,24db_digital_gain"
  42 +                                (The default behaviour is that the Digital
  43 +                                volume control is limited to a maximum of
  44 +                                0dB. ie. it can attenuate but not provide
  45 +                                gain. For most users, this will be desired
  46 +                                as it will prevent clipping. By appending
  47 +                                the 24dB_digital_gain parameter, the Digital
  48 +                                volume control will allow up to 24dB of
  49 +                                gain. If this parameter is enabled, it is the
  50 +                                responsibility of the user to ensure that
  51 +                                the Digital volume control is set to a value
  52 +                                that does not result in clipping/distortion!)
  53 +        slave                   Force DAC+ Pro into slave mode, using Pi as
  54 +                                master for bit clock and frame clock.
  55 +
  56 +
  57  Name:   hifiberry-digi
  58  Info:   Configures the HifiBerry Digi and Digi+ audio card
  59  Load:   dtoverlay=hifiberry-digi
  60 --- /dev/null
  61 +++ b/arch/arm/boot/dts/overlays/hifiberry-dacplusadc-overlay.dts
  62 @@ -0,0 +1,71 @@
  63 +// Definitions for HiFiBerry DAC+ADC
  64 +/dts-v1/;
  65 +/plugin/;
  66 +
  67 +/ {
  68 +       compatible = "brcm,bcm2708";
  69 +
  70 +       fragment@0 {
  71 +               target-path = "/clocks";
  72 +               __overlay__ {
  73 +                       dacpro_osc: dacpro_osc {
  74 +                               compatible = "hifiberry,dacpro-clk";
  75 +                               #clock-cells = <0>;
  76 +                       };
  77 +               };
  78 +       };
  79 +
  80 +       fragment@1 {
  81 +               target = <&i2s>;
  82 +               __overlay__ {
  83 +                       status = "okay";
  84 +               };
  85 +       };
  86 +
  87 +       fragment@2 {
  88 +               target = <&i2c1>;
  89 +               __overlay__ {
  90 +                       #address-cells = <1>;
  91 +                       #size-cells = <0>;
  92 +                       status = "okay";
  93 +
  94 +                       pcm_codec: pcm5122@4d {
  95 +                               #sound-dai-cells = <0>;
  96 +                               compatible = "ti,pcm5122";
  97 +                               reg = <0x4d>;
  98 +                               clocks = <&dacpro_osc>;
  99 +                               AVDD-supply = <&vdd_3v3_reg>;
 100 +                               DVDD-supply = <&vdd_3v3_reg>;
 101 +                               CPVDD-supply = <&vdd_3v3_reg>;
 102 +                               status = "okay";
 103 +                       };
 104 +               };
 105 +       };
 106 +
 107 +       fragment@3 {
 108 +               target-path = "/";
 109 +               __overlay__ {
 110 +                       dmic {
 111 +                               #sound-dai-cells = <0>;
 112 +                               compatible = "dmic-codec";
 113 +                               num-channels = <2>;
 114 +                               status = "okay";
 115 +                       };
 116 +               };
 117 +       };
 118 +
 119 +       fragment@4 {
 120 +               target = <&sound>;
 121 +               hifiberry_dacplusadc: __overlay__ {
 122 +                       compatible = "hifiberry,hifiberry-dacplusadc";
 123 +                       i2s-controller = <&i2s>;
 124 +                       status = "okay";
 125 +               };
 126 +       };
 127 +
 128 +       __overrides__ {
 129 +               24db_digital_gain =
 130 +                       <&hifiberry_dacplusadc>,"hifiberry,24db_digital_gain?";
 131 +               slave = <&hifiberry_dacplusadc>,"hifiberry-dacplusadc,slave?";
 132 +       };
 133 +};
 134 --- a/arch/arm/configs/bcm2709_defconfig
 135 +++ b/arch/arm/configs/bcm2709_defconfig
 136 @@ -905,6 +905,7 @@ CONFIG_SND_BCM2835_SOC_I2S=m
 137  CONFIG_SND_BCM2708_SOC_3DLAB_NANO_PLAYER=m
 138  CONFIG_SND_BCM2708_SOC_GOOGLEVOICEHAT_SOUNDCARD=m
 139  CONFIG_SND_BCM2708_SOC_HIFIBERRY_DAC=m
 140 +CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUSADC=m
 141  CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUS=m
 142  CONFIG_SND_BCM2708_SOC_HIFIBERRY_DIGI=m
 143  CONFIG_SND_BCM2708_SOC_HIFIBERRY_AMP=m
 144 --- a/arch/arm/configs/bcmrpi_defconfig
 145 +++ b/arch/arm/configs/bcmrpi_defconfig
 146 @@ -898,6 +898,7 @@ CONFIG_SND_BCM2835_SOC_I2S=m
 147  CONFIG_SND_BCM2708_SOC_3DLAB_NANO_PLAYER=m
 148  CONFIG_SND_BCM2708_SOC_GOOGLEVOICEHAT_SOUNDCARD=m
 149  CONFIG_SND_BCM2708_SOC_HIFIBERRY_DAC=m
 150 +CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUSADC=m
 151  CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUS=m
 152  CONFIG_SND_BCM2708_SOC_HIFIBERRY_DIGI=m
 153  CONFIG_SND_BCM2708_SOC_HIFIBERRY_AMP=m
 154 --- a/sound/soc/bcm/Kconfig
 155 +++ b/sound/soc/bcm/Kconfig
 156 @@ -46,6 +46,14 @@ config SND_BCM2708_SOC_HIFIBERRY_DACPLUS
 157          help
 158           Say Y or M if you want to add support for HifiBerry DAC+.
 159
 160 +config SND_BCM2708_SOC_HIFIBERRY_DACPLUSADC
 161 +        tristate "Support for HifiBerry DAC+ADC"
 162 +        depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
 163 +        select SND_SOC_PCM512x_I2C
 164 +       select SND_SOC_DMIC
 165 +        help
 166 +         Say Y or M if you want to add support for HifiBerry DAC+ADC.
 167 +
 168  config SND_BCM2708_SOC_HIFIBERRY_DIGI
 169          tristate "Support for HifiBerry Digi"
 170          depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
 171 --- a/sound/soc/bcm/Makefile
 172 +++ b/sound/soc/bcm/Makefile
 173 @@ -14,6 +14,7 @@ snd-soc-googlevoicehat-codec-objs := goo
 174  # BCM2708 Machine Support
 175  snd-soc-3dlab-nano-player-objs := 3dlab-nano-player.o
 176  snd-soc-hifiberry-dacplus-objs := hifiberry_dacplus.o
 177 +snd-soc-hifiberry-dacplusadc-objs := hifiberry_dacplusadc.o
 178  snd-soc-justboom-dac-objs := justboom-dac.o
 179  snd-soc-rpi-cirrus-objs := rpi-cirrus.o
 180  snd-soc-rpi-proto-objs := rpi-proto.o
 181 @@ -36,6 +37,7 @@ snd-soc-rpi-wm8804-soundcard-objs := rpi
 182  obj-$(CONFIG_SND_BCM2708_SOC_3DLAB_NANO_PLAYER) += snd-soc-3dlab-nano-player.o
 183  obj-$(CONFIG_SND_BCM2708_SOC_GOOGLEVOICEHAT_SOUNDCARD)  += snd-soc-googlevoicehat-codec.o
 184  obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUS) += snd-soc-hifiberry-dacplus.o
 185 +obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUSADC) += snd-soc-hifiberry-dacplusadc.o
 186  obj-$(CONFIG_SND_BCM2708_SOC_JUSTBOOM_DAC) += snd-soc-justboom-dac.o
 187  obj-$(CONFIG_SND_BCM2708_SOC_RPI_CIRRUS) += snd-soc-rpi-cirrus.o
 188  obj-$(CONFIG_SND_BCM2708_SOC_RPI_PROTO) += snd-soc-rpi-proto.o
 189 --- /dev/null
 190 +++ b/sound/soc/bcm/hifiberry_dacplusadc.c
 191 @@ -0,0 +1,407 @@
 192 +/*
 193 + * ASoC Driver for HiFiBerry DAC+ / DAC Pro with ADC
 194 + *
 195 + * Author:     Daniel Matuschek, Stuart MacLean <stuart@hifiberry.com>
 196 + *             Copyright 2014-2015
 197 + *             based on code by Florian Meier <florian.meier@koalo.de>
 198 + *             ADC added by Joerg Schambacher <joscha@schambacher.com>
 199 + *             Copyright 2018
 200 + *
 201 + * This program is free software; you can redistribute it and/or
 202 + * modify it under the terms of the GNU General Public License
 203 + * version 2 as published by the Free Software Foundation.
 204 + *
 205 + * This program is distributed in the hope that it will be useful, but
 206 + * WITHOUT ANY WARRANTY; without even the implied warranty of
 207 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 208 + * General Public License for more details.
 209 + */
 210 +
 211 +#include <linux/module.h>
 212 +#include <linux/platform_device.h>
 213 +#include <linux/kernel.h>
 214 +#include <linux/clk.h>
 215 +#include <linux/kernel.h>
 216 +#include <linux/module.h>
 217 +#include <linux/of.h>
 218 +#include <linux/slab.h>
 219 +#include <linux/delay.h>
 220 +
 221 +#include <sound/core.h>
 222 +#include <sound/pcm.h>
 223 +#include <sound/pcm_params.h>
 224 +#include <sound/soc.h>
 225 +#include <sound/jack.h>
 226 +
 227 +#include "../codecs/pcm512x.h"
 228 +
 229 +#define HIFIBERRY_DACPRO_NOCLOCK 0
 230 +#define HIFIBERRY_DACPRO_CLK44EN 1
 231 +#define HIFIBERRY_DACPRO_CLK48EN 2
 232 +
 233 +struct platform_device *dmic_codec_dev;
 234 +
 235 +struct pcm512x_priv {
 236 +       struct regmap *regmap;
 237 +       struct clk *sclk;
 238 +};
 239 +
 240 +/* Clock rate of CLK44EN attached to GPIO6 pin */
 241 +#define CLK_44EN_RATE 22579200UL
 242 +/* Clock rate of CLK48EN attached to GPIO3 pin */
 243 +#define CLK_48EN_RATE 24576000UL
 244 +
 245 +static bool slave;
 246 +static bool snd_rpi_hifiberry_is_dacpro;
 247 +static bool digital_gain_0db_limit = true;
 248 +
 249 +static void snd_rpi_hifiberry_dacplusadc_select_clk(struct snd_soc_component *component,
 250 +       int clk_id)
 251 +{
 252 +       switch (clk_id) {
 253 +       case HIFIBERRY_DACPRO_NOCLOCK:
 254 +               snd_soc_component_update_bits(component, PCM512x_GPIO_CONTROL_1, 0x24, 0x00);
 255 +               break;
 256 +       case HIFIBERRY_DACPRO_CLK44EN:
 257 +               snd_soc_component_update_bits(component, PCM512x_GPIO_CONTROL_1, 0x24, 0x20);
 258 +               break;
 259 +       case HIFIBERRY_DACPRO_CLK48EN:
 260 +               snd_soc_component_update_bits(component, PCM512x_GPIO_CONTROL_1, 0x24, 0x04);
 261 +               break;
 262 +       }
 263 +}
 264 +
 265 +static void snd_rpi_hifiberry_dacplusadc_clk_gpio(struct snd_soc_component *component)
 266 +{
 267 +       snd_soc_component_update_bits(component, PCM512x_GPIO_EN, 0x24, 0x24);
 268 +       snd_soc_component_update_bits(component, PCM512x_GPIO_OUTPUT_3, 0x0f, 0x02);
 269 +       snd_soc_component_update_bits(component, PCM512x_GPIO_OUTPUT_6, 0x0f, 0x02);
 270 +}
 271 +
 272 +static bool snd_rpi_hifiberry_dacplusadc_is_sclk(struct snd_soc_component *component)
 273 +{
 274 +       unsigned int sck;
 275 +
 276 +       snd_soc_component_read(component, PCM512x_RATE_DET_4, &sck);
 277 +       return (!(sck & 0x40));
 278 +}
 279 +
 280 +static bool snd_rpi_hifiberry_dacplusadc_is_sclk_sleep(
 281 +       struct snd_soc_component *component)
 282 +{
 283 +       msleep(2);
 284 +       return snd_rpi_hifiberry_dacplusadc_is_sclk(component);
 285 +}
 286 +
 287 +static bool snd_rpi_hifiberry_dacplusadc_is_pro_card(struct snd_soc_component *component)
 288 +{
 289 +       bool isClk44EN, isClk48En, isNoClk;
 290 +
 291 +       snd_rpi_hifiberry_dacplusadc_clk_gpio(component);
 292 +
 293 +       snd_rpi_hifiberry_dacplusadc_select_clk(component, HIFIBERRY_DACPRO_CLK44EN);
 294 +       isClk44EN = snd_rpi_hifiberry_dacplusadc_is_sclk_sleep(component);
 295 +
 296 +       snd_rpi_hifiberry_dacplusadc_select_clk(component, HIFIBERRY_DACPRO_NOCLOCK);
 297 +       isNoClk = snd_rpi_hifiberry_dacplusadc_is_sclk_sleep(component);
 298 +
 299 +       snd_rpi_hifiberry_dacplusadc_select_clk(component, HIFIBERRY_DACPRO_CLK48EN);
 300 +       isClk48En = snd_rpi_hifiberry_dacplusadc_is_sclk_sleep(component);
 301 +
 302 +       return (isClk44EN && isClk48En && !isNoClk);
 303 +}
 304 +
 305 +static int snd_rpi_hifiberry_dacplusadc_clk_for_rate(int sample_rate)
 306 +{
 307 +       int type;
 308 +
 309 +       switch (sample_rate) {
 310 +       case 11025:
 311 +       case 22050:
 312 +       case 44100:
 313 +       case 88200:
 314 +       case 176400:
 315 +       case 352800:
 316 +               type = HIFIBERRY_DACPRO_CLK44EN;
 317 +               break;
 318 +       default:
 319 +               type = HIFIBERRY_DACPRO_CLK48EN;
 320 +               break;
 321 +       }
 322 +       return type;
 323 +}
 324 +
 325 +static void snd_rpi_hifiberry_dacplusadc_set_sclk(struct snd_soc_component *component,
 326 +       int sample_rate)
 327 +{
 328 +       struct pcm512x_priv *pcm512x = snd_soc_component_get_drvdata(component);
 329 +
 330 +       if (!IS_ERR(pcm512x->sclk)) {
 331 +               int ctype;
 332 +
 333 +               ctype = snd_rpi_hifiberry_dacplusadc_clk_for_rate(sample_rate);
 334 +               clk_set_rate(pcm512x->sclk, (ctype == HIFIBERRY_DACPRO_CLK44EN)
 335 +                       ? CLK_44EN_RATE : CLK_48EN_RATE);
 336 +               snd_rpi_hifiberry_dacplusadc_select_clk(component, ctype);
 337 +       }
 338 +}
 339 +
 340 +static int snd_rpi_hifiberry_dacplusadc_init(struct snd_soc_pcm_runtime *rtd)
 341 +{
 342 +       struct snd_soc_component *component = rtd->codec_dai->component;
 343 +       struct pcm512x_priv *priv;
 344 +
 345 +       if (slave)
 346 +               snd_rpi_hifiberry_is_dacpro = false;
 347 +       else
 348 +               snd_rpi_hifiberry_is_dacpro =
 349 +                               snd_rpi_hifiberry_dacplusadc_is_pro_card(component);
 350 +
 351 +       if (snd_rpi_hifiberry_is_dacpro) {
 352 +               struct snd_soc_dai_link *dai = rtd->dai_link;
 353 +
 354 +               dai->name = "HiFiBerry ADCDAC+ Pro";
 355 +               dai->stream_name = "HiFiBerry ADCDAC+ Pro HiFi";
 356 +               dai->dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
 357 +                       | SND_SOC_DAIFMT_CBM_CFM;
 358 +
 359 +               snd_soc_component_update_bits(component, PCM512x_BCLK_LRCLK_CFG, 0x31, 0x11);
 360 +               snd_soc_component_update_bits(component, PCM512x_MASTER_MODE, 0x03, 0x03);
 361 +               snd_soc_component_update_bits(component, PCM512x_MASTER_CLKDIV_2, 0x7f, 63);
 362 +       } else {
 363 +               priv = snd_soc_component_get_drvdata(component);
 364 +               priv->sclk = ERR_PTR(-ENOENT);
 365 +       }
 366 +
 367 +       snd_soc_component_update_bits(component, PCM512x_GPIO_EN, 0x08, 0x08);
 368 +       snd_soc_component_update_bits(component, PCM512x_GPIO_OUTPUT_4, 0x0f, 0x02);
 369 +       snd_soc_component_update_bits(component, PCM512x_GPIO_CONTROL_1, 0x08, 0x08);
 370 +
 371 +       if (digital_gain_0db_limit) {
 372 +               int ret;
 373 +               struct snd_soc_card *card = rtd->card;
 374 +
 375 +               ret = snd_soc_limit_volume(card, "Digital Playback Volume", 207);
 376 +               if (ret < 0)
 377 +                       dev_warn(card->dev, "Failed to set volume limit: %d\n", ret);
 378 +       }
 379 +
 380 +       return 0;
 381 +}
 382 +
 383 +static int snd_rpi_hifiberry_dacplusadc_update_rate_den(
 384 +       struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params)
 385 +{
 386 +       struct snd_soc_pcm_runtime *rtd = substream->private_data;
 387 +       struct snd_soc_component *component = rtd->codec_dai->component;
 388 +       struct pcm512x_priv *pcm512x = snd_soc_component_get_drvdata(component);
 389 +       struct snd_ratnum *rats_no_pll;
 390 +       unsigned int num = 0, den = 0;
 391 +       int err;
 392 +
 393 +       rats_no_pll = devm_kzalloc(rtd->dev, sizeof(*rats_no_pll), GFP_KERNEL);
 394 +       if (!rats_no_pll)
 395 +               return -ENOMEM;
 396 +
 397 +       rats_no_pll->num = clk_get_rate(pcm512x->sclk) / 64;
 398 +       rats_no_pll->den_min = 1;
 399 +       rats_no_pll->den_max = 128;
 400 +       rats_no_pll->den_step = 1;
 401 +
 402 +       err = snd_interval_ratnum(hw_param_interval(params,
 403 +               SNDRV_PCM_HW_PARAM_RATE), 1, rats_no_pll, &num, &den);
 404 +       if (err >= 0 && den) {
 405 +               params->rate_num = num;
 406 +               params->rate_den = den;
 407 +       }
 408 +
 409 +       devm_kfree(rtd->dev, rats_no_pll);
 410 +       return 0;
 411 +}
 412 +
 413 +static int snd_rpi_hifiberry_dacplusadc_hw_params(
 414 +       struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params)
 415 +{
 416 +       int ret = 0;
 417 +       struct snd_soc_pcm_runtime *rtd = substream->private_data;
 418 +       int channels = params_channels(params);
 419 +       int width = 32;
 420 +
 421 +       if (snd_rpi_hifiberry_is_dacpro) {
 422 +               struct snd_soc_component *component = rtd->codec_dai->component;
 423 +
 424 +               width = snd_pcm_format_physical_width(params_format(params));
 425 +
 426 +               snd_rpi_hifiberry_dacplusadc_set_sclk(component,
 427 +                       params_rate(params));
 428 +
 429 +               ret = snd_rpi_hifiberry_dacplusadc_update_rate_den(
 430 +                       substream, params);
 431 +       }
 432 +
 433 +       ret = snd_soc_dai_set_tdm_slot(rtd->cpu_dai, 0x03, 0x03,
 434 +               channels, width);
 435 +       if (ret)
 436 +               return ret;
 437 +       ret = snd_soc_dai_set_tdm_slot(rtd->codec_dai, 0x03, 0x03,
 438 +               channels, width);
 439 +       return ret;
 440 +}
 441 +
 442 +static int hifiberry_dacplusadc_LED_cnt;
 443 +
 444 +static int snd_rpi_hifiberry_dacplusadc_startup(
 445 +       struct snd_pcm_substream *substream)
 446 +{
 447 +       struct snd_soc_pcm_runtime *rtd = substream->private_data;
 448 +       struct snd_soc_component *component = rtd->codec_dai->component;
 449 +
 450 +       snd_soc_component_update_bits(component, PCM512x_GPIO_CONTROL_1,
 451 +                                        0x08, 0x08);
 452 +       hifiberry_dacplusadc_LED_cnt++;
 453 +       return 0;
 454 +}
 455 +
 456 +static void snd_rpi_hifiberry_dacplusadc_shutdown(
 457 +       struct snd_pcm_substream *substream)
 458 +{
 459 +       struct snd_soc_pcm_runtime *rtd = substream->private_data;
 460 +       struct snd_soc_component *component = rtd->codec_dai->component;
 461 +
 462 +       hifiberry_dacplusadc_LED_cnt--;
 463 +       if (!hifiberry_dacplusadc_LED_cnt)
 464 +               snd_soc_component_update_bits(component, PCM512x_GPIO_CONTROL_1,
 465 +                                                0x08, 0x00);
 466 +}
 467 +
 468 +/* machine stream operations */
 469 +static struct snd_soc_ops snd_rpi_hifiberry_dacplusadc_ops = {
 470 +       .hw_params = snd_rpi_hifiberry_dacplusadc_hw_params,
 471 +       .startup = snd_rpi_hifiberry_dacplusadc_startup,
 472 +       .shutdown = snd_rpi_hifiberry_dacplusadc_shutdown,
 473 +};
 474 +
 475 +static struct snd_soc_dai_link_component snd_rpi_hifiberry_dacplusadc_codecs[] = {
 476 +       {
 477 +               .name = "pcm512x.1-004d",
 478 +               .dai_name = "pcm512x-hifi",
 479 +       },
 480 +       {
 481 +               .name = "dmic-codec",
 482 +               .dai_name = "dmic-hifi",
 483 +       },
 484 +};
 485 +
 486 +static struct snd_soc_dai_link snd_rpi_hifiberry_dacplusadc_dai[] = {
 487 +{
 488 +       .name           = "HiFiBerry DAC+ADC",
 489 +       .stream_name    = "HiFiBerry DAC+ADC HiFi",
 490 +       .cpu_dai_name   = "bcm2708-i2s.0",
 491 +       .platform_name  = "bcm2708-i2s.0",
 492 +       .codecs         = snd_rpi_hifiberry_dacplusadc_codecs,
 493 +       .num_codecs     = 2,
 494 +       .dai_fmt        = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 495 +                               SND_SOC_DAIFMT_CBS_CFS,
 496 +       .ops            = &snd_rpi_hifiberry_dacplusadc_ops,
 497 +       .init           = snd_rpi_hifiberry_dacplusadc_init,
 498 +},
 499 +};
 500 +
 501 +/* audio machine driver */
 502 +static struct snd_soc_card snd_rpi_hifiberry_dacplusadc = {
 503 +       .name         = "snd_rpi_hifiberry_dacplusadc",
 504 +       .driver_name  = "HifiberryDacpAdc",
 505 +       .owner        = THIS_MODULE,
 506 +       .dai_link     = snd_rpi_hifiberry_dacplusadc_dai,
 507 +       .num_links    = ARRAY_SIZE(snd_rpi_hifiberry_dacplusadc_dai),
 508 +};
 509 +
 510 +
 511 +static int snd_rpi_hifiberry_dacplusadc_probe(struct platform_device *pdev)
 512 +{
 513 +       int ret = 0;
 514 +
 515 +       snd_rpi_hifiberry_dacplusadc.dev = &pdev->dev;
 516 +       if (pdev->dev.of_node) {
 517 +               struct device_node *i2s_node;
 518 +               struct snd_soc_dai_link *dai;
 519 +
 520 +               dai = &snd_rpi_hifiberry_dacplusadc_dai[0];
 521 +               i2s_node = of_parse_phandle(pdev->dev.of_node,
 522 +                       "i2s-controller", 0);
 523 +               if (i2s_node) {
 524 +                       dai->cpu_of_node = i2s_node;
 525 +                       dai->platform_of_node = i2s_node;
 526 +                       dai->cpu_dai_name = NULL;
 527 +                       dai->platform_name = NULL;
 528 +               }
 529 +               dai = &snd_rpi_hifiberry_dacplusadc_dai[1];
 530 +               i2s_node = of_parse_phandle(pdev->dev.of_node, "dmic", 0);
 531 +               if (i2s_node) {
 532 +                       dai->cpu_of_node = i2s_node;
 533 +                       dai->platform_of_node = i2s_node;
 534 +               }
 535 +
 536 +       }
 537 +       digital_gain_0db_limit = !of_property_read_bool(
 538 +               pdev->dev.of_node, "hifiberry,24db_digital_gain");
 539 +       slave = of_property_read_bool(pdev->dev.of_node,
 540 +                                       "hifiberry-dacplusadc,slave");
 541 +
 542 +       ret = devm_snd_soc_register_card(&pdev->dev,
 543 +                                                &snd_rpi_hifiberry_dacplusadc);
 544 +       if (ret && ret != -EPROBE_DEFER)
 545 +               dev_err(&pdev->dev,
 546 +                       "snd_soc_register_card() failed: %d\n", ret);
 547 +
 548 +       return ret;
 549 +}
 550 +
 551 +static const struct of_device_id snd_rpi_hifiberry_dacplusadc_of_match[] = {
 552 +       { .compatible = "hifiberry,hifiberry-dacplusadc", },
 553 +       {},
 554 +};
 555 +
 556 +MODULE_DEVICE_TABLE(of, snd_rpi_hifiberry_dacplusadc_of_match);
 557 +
 558 +static struct platform_driver snd_rpi_hifiberry_dacplusadc_driver = {
 559 +       .driver = {
 560 +               .name   = "snd-rpi-hifiberry-dacplusadc",
 561 +               .owner  = THIS_MODULE,
 562 +               .of_match_table = snd_rpi_hifiberry_dacplusadc_of_match,
 563 +       },
 564 +       .probe          = snd_rpi_hifiberry_dacplusadc_probe,
 565 +};
 566 +
 567 +static int __init hifiberry_dacplusadc_init(void)
 568 +{
 569 +       int ret;
 570 +
 571 +       dmic_codec_dev = platform_device_register_simple("dmic-codec", -1, NULL,
 572 +                                                        0);
 573 +       if (IS_ERR(dmic_codec_dev)) {
 574 +               pr_err("%s: dmic-codec device registration failed\n", __func__);
 575 +               return PTR_ERR(dmic_codec_dev);
 576 +       }
 577 +
 578 +       ret = platform_driver_register(&snd_rpi_hifiberry_dacplusadc_driver);
 579 +       if (ret) {
 580 +               pr_err("%s: platform driver registration failed\n", __func__);
 581 +               platform_device_unregister(dmic_codec_dev);
 582 +       }
 583 +
 584 +       return ret;
 585 +}
 586 +module_init(hifiberry_dacplusadc_init);
 587 +
 588 +static void __exit hifiberry_dacplusadc_exit(void)
 589 +{
 590 +       platform_driver_unregister(&snd_rpi_hifiberry_dacplusadc_driver);
 591 +       platform_device_unregister(dmic_codec_dev);
 592 +}
 593 +module_exit(hifiberry_dacplusadc_exit);
 594 +
 595 +MODULE_AUTHOR("Joerg Schambacher <joscha@schambacher.com>");
 596 +MODULE_AUTHOR("Daniel Matuschek <daniel@hifiberry.com>");
 597 +MODULE_DESCRIPTION("ASoC Driver for HiFiBerry DAC+ADC");
 598 +MODULE_LICENSE("GPL v2");