target/linux/brcm2708/patches-4.4/0241-Add-Support-for-BoomBerry-Audio-boards.patch

   1 From 3120b4247e34e255f4f43d291df4b779b3e9d4c8 Mon Sep 17 00:00:00 2001
   2 From: Aaron Shaw <shawaj@gmail.com>
   3 Date: Thu, 7 Apr 2016 21:26:21 +0100
   4 Subject: [PATCH] Add Support for BoomBerry Audio boards
   5
   6 ---
   7  arch/arm/boot/dts/overlays/Makefile                |   2 +
   8  arch/arm/boot/dts/overlays/README                  |  26 +++
   9  .../boot/dts/overlays/boomberry-dac-overlay.dts    |  43 +++++
  10  .../boot/dts/overlays/boomberry-digi-overlay.dts   |  39 ++++
  11  arch/arm/configs/bcm2709_defconfig                 |   2 +
  12  arch/arm/configs/bcmrpi_defconfig                  |   2 +
  13  sound/soc/bcm/Kconfig                              |  14 ++
  14  sound/soc/bcm/Makefile                             |   4 +
  15  sound/soc/bcm/boomberry-dac.c                      | 163 ++++++++++++++++
  16  sound/soc/bcm/boomberry-digi.c                     | 215 +++++++++++++++++++++
  17  10 files changed, 510 insertions(+)
  18  create mode 100644 arch/arm/boot/dts/overlays/boomberry-dac-overlay.dts
  19  create mode 100644 arch/arm/boot/dts/overlays/boomberry-digi-overlay.dts
  20  create mode 100644 sound/soc/bcm/boomberry-dac.c
  21  create mode 100644 sound/soc/bcm/boomberry-digi.c
  22
  23 --- a/arch/arm/boot/dts/overlays/Makefile
  24 +++ b/arch/arm/boot/dts/overlays/Makefile
  25 @@ -16,6 +16,8 @@ dtbo-$(RPI_DT_OVERLAYS) += ads7846.dtbo
  26  dtbo-$(RPI_DT_OVERLAYS) += akkordion-iqdacplus.dtbo
  27  dtbo-$(RPI_DT_OVERLAYS) += at86rf233.dtbo
  28  dtbo-$(RPI_DT_OVERLAYS) += bmp085_i2c-sensor.dtbo
  29 +dtbo-$(RPI_DT_OVERLAYS) += boomberry-dac.dtbo
  30 +dtbo-$(RPI_DT_OVERLAYS) += boomberry-digi.dtbo
  31  dtbo-$(RPI_DT_OVERLAYS) += dpi24.dtbo
  32  dtbo-$(RPI_DT_OVERLAYS) += dwc2.dtbo
  33  dtbo-$(RPI_DT_OVERLAYS) += dwc-otg.dtbo
  34 --- a/arch/arm/boot/dts/overlays/README
  35 +++ b/arch/arm/boot/dts/overlays/README
  36 @@ -225,6 +225,32 @@ Load:   dtoverlay=bmp085_i2c-sensor
  37  Params: <None>
  38
  39
  40 +Name:   boomberry-dac
  41 +Info:   Configures the BoomBerry DAC HAT, Amp HAT, DAC Zero and Amp Zero audio
  42 +        cards
  43 +Load:   dtoverlay=boomberry-dac,<param>=<val>
  44 +Params: 24db_digital_gain       Allow gain to be applied via the PCM512x codec
  45 +                                Digital volume control. Enable with
  46 +                                "dtoverlay=boomberry-dac,24db_digital_gain"
  47 +                                (The default behaviour is that the Digital
  48 +                                volume control is limited to a maximum of
  49 +                                0dB. ie. it can attenuate but not provide
  50 +                                gain. For most users, this will be desired
  51 +                                as it will prevent clipping. By appending
  52 +                                the 24dB_digital_gain parameter, the Digital
  53 +                                volume control will allow up to 24dB of
  54 +                                gain. If this parameter is enabled, it is the
  55 +                                responsibility of the user to ensure that
  56 +                                the Digital volume control is set to a value
  57 +                                that does not result in clipping/distortion!)
  58 +
  59 +
  60 +Name:   boomberry-digi
  61 +Info:   Configures the BoomBerry Digi HAT and Digi Zero audio cards
  62 +Load:   dtoverlay=boomberry-digi
  63 +Params: <None>
  64 +
  65 +
  66  Name:   dht11
  67  Info:   Overlay for the DHT11/DHT21/DHT22 humidity/temperature sensors
  68          Also sometimes found with the part number(s) AM230x.
  69 --- /dev/null
  70 +++ b/arch/arm/boot/dts/overlays/boomberry-dac-overlay.dts
  71 @@ -0,0 +1,43 @@
  72 +// Definitions for BoomBerry DAC
  73 +/dts-v1/;
  74 +/plugin/;
  75 +
  76 +/ {
  77 +       compatible = "brcm,bcm2708";
  78 +
  79 +       fragment@0 {
  80 +               target = <&sound>;
  81 +               frag0: __overlay__ {
  82 +                       compatible = "boomberry,boomberry-dac";
  83 +                       i2s-controller = <&i2s>;
  84 +                       status = "okay";
  85 +               };
  86 +       };
  87 +
  88 +       fragment@1 {
  89 +               target = <&i2s>;
  90 +               __overlay__ {
  91 +                       status = "okay";
  92 +               };
  93 +       };
  94 +
  95 +       fragment@2 {
  96 +               target = <&i2c1>;
  97 +               __overlay__ {
  98 +                       #address-cells = <1>;
  99 +                       #size-cells = <0>;
 100 +                       status = "okay";
 101 +
 102 +                       pcm5122@4d {
 103 +                               #sound-dai-cells = <0>;
 104 +                               compatible = "ti,pcm5122";
 105 +                               reg = <0x4d>;
 106 +                               status = "okay";
 107 +                       };
 108 +               };
 109 +       };
 110 +
 111 +       __overrides__ {
 112 +               24db_digital_gain = <&frag0>,"boomberry,24db_digital_gain?";
 113 +       };
 114 +};
 115 --- /dev/null
 116 +++ b/arch/arm/boot/dts/overlays/boomberry-digi-overlay.dts
 117 @@ -0,0 +1,39 @@
 118 +// Definitions for BoomBerry Digi
 119 +/dts-v1/;
 120 +/plugin/;
 121 +
 122 +/ {
 123 +       compatible = "brcm,bcm2708";
 124 +
 125 +       fragment@0 {
 126 +               target = <&sound>;
 127 +               __overlay__ {
 128 +                       compatible = "boomberry,boomberry-digi";
 129 +                       i2s-controller = <&i2s>;
 130 +                       status = "okay";
 131 +               };
 132 +       };
 133 +
 134 +       fragment@1 {
 135 +               target = <&i2s>;
 136 +               __overlay__ {
 137 +                       status = "okay";
 138 +               };
 139 +       };
 140 +
 141 +       fragment@2 {
 142 +               target = <&i2c1>;
 143 +               __overlay__ {
 144 +                       #address-cells = <1>;
 145 +                       #size-cells = <0>;
 146 +                       status = "okay";
 147 +
 148 +                       wm8804@3b {
 149 +                               #sound-dai-cells = <0>;
 150 +                               compatible = "wlf,wm8804";
 151 +                               reg = <0x3b>;
 152 +                               status = "okay";
 153 +                       };
 154 +               };
 155 +       };
 156 +};
 157 --- a/arch/arm/configs/bcm2709_defconfig
 158 +++ b/arch/arm/configs/bcm2709_defconfig
 159 @@ -853,6 +853,8 @@ CONFIG_SND_BCM2708_SOC_HIFIBERRY_DAC=m
 160  CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUS=m
 161  CONFIG_SND_BCM2708_SOC_HIFIBERRY_DIGI=m
 162  CONFIG_SND_BCM2708_SOC_HIFIBERRY_AMP=m
 163 +CONFIG_SND_BCM2708_SOC_BOOMBERRY_DAC=m
 164 +CONFIG_SNG_BCM2708_SOC_BOOMBERRY_DIGI=m
 165  CONFIG_SND_BCM2708_SOC_RPI_DAC=m
 166  CONFIG_SND_BCM2708_SOC_RPI_PROTO=m
 167  CONFIG_SND_BCM2708_SOC_IQAUDIO_DAC=m
 168 --- a/arch/arm/configs/bcmrpi_defconfig
 169 +++ b/arch/arm/configs/bcmrpi_defconfig
 170 @@ -845,6 +845,8 @@ CONFIG_SND_BCM2708_SOC_HIFIBERRY_DAC=m
 171  CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUS=m
 172  CONFIG_SND_BCM2708_SOC_HIFIBERRY_DIGI=m
 173  CONFIG_SND_BCM2708_SOC_HIFIBERRY_AMP=m
 174 +CONFIG_SND_BCM2708_SOC_BOOMBERRY_DAC=m
 175 +CONFIG_SND_BCM2708_SOC_BOOMBERRY_DIGI=m
 176  CONFIG_SND_BCM2708_SOC_RPI_DAC=m
 177  CONFIG_SND_BCM2708_SOC_RPI_PROTO=m
 178  CONFIG_SND_BCM2708_SOC_IQAUDIO_DAC=m
 179 --- a/sound/soc/bcm/Kconfig
 180 +++ b/sound/soc/bcm/Kconfig
 181 @@ -50,6 +50,20 @@ config SND_BCM2708_SOC_RPI_PROTO
 182         help
 183           Say Y or M if you want to add support for Audio Codec Board PROTO (WM8731).
 184
 185 +config SND_BCM2708_SOC_BOOMBERRY_DAC
 186 +       tristate "Support for BoomBerry DAC"
 187 +       depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
 188 +       select SND_SOC_PCM512x
 189 +       help
 190 +         Say Y or M if you want to add support for BoomBerry DAC.
 191 +
 192 +config SND_BCM2708_SOC_BOOMBERRY_DIGI
 193 +       tristate "Support for BoomBerry Digi"
 194 +       depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
 195 +       select SND_SOC_WM8804
 196 +       help
 197 +         Say Y or M if you want to add support for BoomBerry Digi.
 198 +
 199  config SND_BCM2708_SOC_IQAUDIO_DAC
 200         tristate "Support for IQaudIO-DAC"
 201         depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
 202 --- a/sound/soc/bcm/Makefile
 203 +++ b/sound/soc/bcm/Makefile
 204 @@ -8,6 +8,8 @@ snd-soc-hifiberry-dac-objs := hifiberry_
 205  snd-soc-hifiberry-dacplus-objs := hifiberry_dacplus.o
 206  snd-soc-hifiberry-digi-objs := hifiberry_digi.o
 207  snd-soc-hifiberry-amp-objs := hifiberry_amp.o
 208 +snd-soc-boomberry-dac-objs := boomberry-dac.o
 209 +snd-soc-boomberry-digi-objs := boomberry-digi.o
 210  snd-soc-rpi-dac-objs := rpi-dac.o
 211  snd-soc-rpi-proto-objs := rpi-proto.o
 212  snd-soc-iqaudio-dac-objs := iqaudio-dac.o
 213 @@ -17,6 +19,8 @@ obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_D
 214  obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUS) += snd-soc-hifiberry-dacplus.o
 215  obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DIGI) += snd-soc-hifiberry-digi.o
 216  obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_AMP) += snd-soc-hifiberry-amp.o
 217 +obj-$(CONFIG_SND_BCM2708_SOC_BOOMBERRY_DAC) += snd-soc-boomberry-dac.o
 218 +obj-$(CONFIG_SND_BCM2708_SOC_BOOMBERRY_DIGI) += snd-soc-boomberry-digi.o
 219  obj-$(CONFIG_SND_BCM2708_SOC_RPI_DAC) += snd-soc-rpi-dac.o
 220  obj-$(CONFIG_SND_BCM2708_SOC_RPI_PROTO) += snd-soc-rpi-proto.o
 221  obj-$(CONFIG_SND_BCM2708_SOC_IQAUDIO_DAC) += snd-soc-iqaudio-dac.o
 222 --- /dev/null
 223 +++ b/sound/soc/bcm/boomberry-dac.c
 224 @@ -0,0 +1,163 @@
 225 +/*
 226 + * ASoC Driver for BoomBerry DAC Raspberry Pi HAT Sound Card
 227 + *
 228 + * Author:     Milan Neskovic
 229 + *             Copyright 2016
 230 + *             based on code by Daniel Matuschek <info@crazy-audio.com>
 231 + *             based on code by Florian Meier <florian.meier@koalo.de>
 232 + *
 233 + * This program is free software; you can redistribute it and/or
 234 + * modify it under the terms of the GNU General Public License
 235 + * version 2 as published by the Free Software Foundation.
 236 + *
 237 + * This program is distributed in the hope that it will be useful, but
 238 + * WITHOUT ANY WARRANTY; without even the implied warranty of
 239 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 240 + * General Public License for more details.
 241 + */
 242 +
 243 +#include <linux/module.h>
 244 +#include <linux/platform_device.h>
 245 +
 246 +#include <sound/core.h>
 247 +#include <sound/pcm.h>
 248 +#include <sound/pcm_params.h>
 249 +#include <sound/soc.h>
 250 +#include <sound/jack.h>
 251 +
 252 +#include "../codecs/pcm512x.h"
 253 +
 254 +static bool digital_gain_0db_limit = true;
 255 +
 256 +static int snd_rpi_boomberry_dac_init(struct snd_soc_pcm_runtime *rtd)
 257 +{
 258 +       struct snd_soc_codec *codec = rtd->codec;
 259 +       snd_soc_update_bits(codec, PCM512x_GPIO_EN, 0x08, 0x08);
 260 +       snd_soc_update_bits(codec, PCM512x_GPIO_OUTPUT_4, 0xf, 0x02);
 261 +       snd_soc_update_bits(codec, PCM512x_GPIO_CONTROL_1, 0x08,0x08);
 262 +
 263 +       if (digital_gain_0db_limit)
 264 +       {
 265 +               int ret;
 266 +               struct snd_soc_card *card = rtd->card;
 267 +               struct snd_soc_codec *codec = rtd->codec;
 268 +
 269 +               ret = snd_soc_limit_volume(codec, "Digital Playback Volume", 207);
 270 +               if (ret < 0)
 271 +                       dev_warn(card->dev, "Failed to set volume limit: %d\n", ret);
 272 +       }
 273 +
 274 +       return 0;
 275 +}
 276 +
 277 +static int snd_rpi_boomberry_dac_hw_params(struct snd_pcm_substream *substream,
 278 +                                      struct snd_pcm_hw_params *params)
 279 +{
 280 +       struct snd_soc_pcm_runtime *rtd = substream->private_data;
 281 +       struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 282 +       /*return snd_soc_dai_set_bclk_ratio(cpu_dai, 64);*/
 283 +       unsigned int sample_bits =
 284 +               snd_pcm_format_physical_width(params_format(params));
 285 +       return snd_soc_dai_set_bclk_ratio(cpu_dai, sample_bits * 2);
 286 +}
 287 +
 288 +static int snd_rpi_boomberry_dac_startup(struct snd_pcm_substream *substream) {
 289 +       struct snd_soc_pcm_runtime *rtd = substream->private_data;
 290 +       struct snd_soc_codec *codec = rtd->codec;
 291 +       snd_soc_update_bits(codec, PCM512x_GPIO_CONTROL_1, 0x08,0x08);
 292 +       return 0;
 293 +}
 294 +
 295 +static void snd_rpi_boomberry_dac_shutdown(struct snd_pcm_substream *substream) {
 296 +       struct snd_soc_pcm_runtime *rtd = substream->private_data;
 297 +       struct snd_soc_codec *codec = rtd->codec;
 298 +       snd_soc_update_bits(codec, PCM512x_GPIO_CONTROL_1, 0x08,0x00);
 299 +}
 300 +
 301 +/* machine stream operations */
 302 +static struct snd_soc_ops snd_rpi_boomberry_dac_ops = {
 303 +       .hw_params = snd_rpi_boomberry_dac_hw_params,
 304 +       .startup = snd_rpi_boomberry_dac_startup,
 305 +       .shutdown = snd_rpi_boomberry_dac_shutdown,
 306 +};
 307 +
 308 +static struct snd_soc_dai_link snd_rpi_boomberry_dac_dai[] = {
 309 +{
 310 +       .name           = "BoomBerry DAC",
 311 +       .stream_name    = "BoomBerry DAC HiFi",
 312 +       .cpu_dai_name   = "bcm2708-i2s.0",
 313 +       .codec_dai_name = "pcm512x-hifi",
 314 +       .platform_name  = "bcm2708-i2s.0",
 315 +       .codec_name     = "pcm512x.1-004d",
 316 +       .dai_fmt        = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 317 +                               SND_SOC_DAIFMT_CBS_CFS,
 318 +       .ops            = &snd_rpi_boomberry_dac_ops,
 319 +       .init           = snd_rpi_boomberry_dac_init,
 320 +},
 321 +};
 322 +
 323 +/* audio machine driver */
 324 +static struct snd_soc_card snd_rpi_boomberry_dac = {
 325 +       .name         = "snd_rpi_boomberry_dac",
 326 +       .owner        = THIS_MODULE,
 327 +       .dai_link     = snd_rpi_boomberry_dac_dai,
 328 +       .num_links    = ARRAY_SIZE(snd_rpi_boomberry_dac_dai),
 329 +};
 330 +
 331 +static int snd_rpi_boomberry_dac_probe(struct platform_device *pdev)
 332 +{
 333 +       int ret = 0;
 334 +
 335 +       snd_rpi_boomberry_dac.dev = &pdev->dev;
 336 +
 337 +       if (pdev->dev.of_node) {
 338 +           struct device_node *i2s_node;
 339 +           struct snd_soc_dai_link *dai = &snd_rpi_boomberry_dac_dai[0];
 340 +           i2s_node = of_parse_phandle(pdev->dev.of_node,
 341 +                                       "i2s-controller", 0);
 342 +
 343 +           if (i2s_node) {
 344 +                       dai->cpu_dai_name = NULL;
 345 +                       dai->cpu_of_node = i2s_node;
 346 +                       dai->platform_name = NULL;
 347 +                       dai->platform_of_node = i2s_node;
 348 +           }
 349 +
 350 +           digital_gain_0db_limit = !of_property_read_bool(
 351 +                       pdev->dev.of_node, "boomberry,24db_digital_gain");
 352 +       }
 353 +
 354 +       ret = snd_soc_register_card(&snd_rpi_boomberry_dac);
 355 +       if (ret)
 356 +               dev_err(&pdev->dev,
 357 +                       "snd_soc_register_card() failed: %d\n", ret);
 358 +
 359 +       return ret;
 360 +}
 361 +
 362 +static int snd_rpi_boomberry_dac_remove(struct platform_device *pdev)
 363 +{
 364 +       return snd_soc_unregister_card(&snd_rpi_boomberry_dac);
 365 +}
 366 +
 367 +static const struct of_device_id snd_rpi_boomberry_dac_of_match[] = {
 368 +       { .compatible = "boomberry,boomberry-dac", },
 369 +       {},
 370 +};
 371 +MODULE_DEVICE_TABLE(of, snd_rpi_boomberry_dac_of_match);
 372 +
 373 +static struct platform_driver snd_rpi_boomberry_dac_driver = {
 374 +       .driver = {
 375 +               .name   = "snd-rpi-boomberry-dac",
 376 +               .owner  = THIS_MODULE,
 377 +               .of_match_table = snd_rpi_boomberry_dac_of_match,
 378 +       },
 379 +       .probe          = snd_rpi_boomberry_dac_probe,
 380 +       .remove         = snd_rpi_boomberry_dac_remove,
 381 +};
 382 +
 383 +module_platform_driver(snd_rpi_boomberry_dac_driver);
 384 +
 385 +MODULE_AUTHOR("Milan Neskovic <info@boomberry.co>");
 386 +MODULE_DESCRIPTION("ASoC Driver for BoomBerry PI DAC HAT Sound Card");
 387 +MODULE_LICENSE("GPL v2");
 388 --- /dev/null
 389 +++ b/sound/soc/bcm/boomberry-digi.c
 390 @@ -0,0 +1,215 @@
 391 +/*
 392 + * ASoC Driver for BoomBerry Raspberry Pi Digi HAT Sound Card
 393 + *
 394 + * Author:     Milan Neskovic
 395 + *             Copyright 2016
 396 + *             based on code by Daniel Matuschek <info@crazy-audio.com>
 397 + *             based on code by Florian Meier <florian.meier@koalo.de>
 398 + *
 399 + * This program is free software; you can redistribute it and/or
 400 + * modify it under the terms of the GNU General Public License
 401 + * version 2 as published by the Free Software Foundation.
 402 + *
 403 + * This program is distributed in the hope that it will be useful, but
 404 + * WITHOUT ANY WARRANTY; without even the implied warranty of
 405 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 406 + * General Public License for more details.
 407 + */
 408 +
 409 +#include <linux/module.h>
 410 +#include <linux/platform_device.h>
 411 +
 412 +#include <sound/core.h>
 413 +#include <sound/pcm.h>
 414 +#include <sound/pcm_params.h>
 415 +#include <sound/soc.h>
 416 +#include <sound/jack.h>
 417 +
 418 +#include "../codecs/wm8804.h"
 419 +
 420 +static int snd_rpi_boomberry_digi_init(struct snd_soc_pcm_runtime *rtd)
 421 +{
 422 +       struct snd_soc_codec *codec = rtd->codec;
 423 +
 424 +       /* enable TX output */
 425 +       snd_soc_update_bits(codec, WM8804_PWRDN, 0x4, 0x0);
 426 +
 427 +       return 0;
 428 +}
 429 +
 430 +static int snd_rpi_boomberry_digi_startup(struct snd_pcm_substream *substream) {
 431 +       /* turn on digital output */
 432 +       struct snd_soc_pcm_runtime *rtd = substream->private_data;
 433 +       struct snd_soc_codec *codec = rtd->codec;
 434 +       snd_soc_update_bits(codec, WM8804_PWRDN, 0x3c, 0x00);
 435 +       return 0;
 436 +}
 437 +
 438 +static void snd_rpi_boomberry_digi_shutdown(struct snd_pcm_substream *substream) {
 439 +       /* turn off output */
 440 +       struct snd_soc_pcm_runtime *rtd = substream->private_data;
 441 +       struct snd_soc_codec *codec = rtd->codec;
 442 +       snd_soc_update_bits(codec, WM8804_PWRDN, 0x3c, 0x3c);
 443 +}
 444 +
 445 +static int snd_rpi_boomberry_digi_hw_params(struct snd_pcm_substream *substream,
 446 +                                      struct snd_pcm_hw_params *params)
 447 +{
 448 +       struct snd_soc_pcm_runtime *rtd = substream->private_data;
 449 +       struct snd_soc_dai *codec_dai = rtd->codec_dai;
 450 +       struct snd_soc_codec *codec = rtd->codec;
 451 +       struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 452 +
 453 +       int sysclk = 27000000; /* This is fixed on this board */
 454 +
 455 +       long mclk_freq=0;
 456 +       int mclk_div=1;
 457 +       int sampling_freq=1;
 458 +
 459 +       int ret;
 460 +
 461 +       int samplerate = params_rate(params);
 462 +
 463 +       if (samplerate<=96000) {
 464 +               mclk_freq=samplerate*256;
 465 +               mclk_div=WM8804_MCLKDIV_256FS;
 466 +       } else {
 467 +               mclk_freq=samplerate*128;
 468 +               mclk_div=WM8804_MCLKDIV_128FS;
 469 +       }
 470 +
 471 +       switch (samplerate) {
 472 +               case 32000:
 473 +                       sampling_freq=0x03;
 474 +                       break;
 475 +               case 44100:
 476 +                       sampling_freq=0x00;
 477 +                       break;
 478 +               case 48000:
 479 +                       sampling_freq=0x02;
 480 +                       break;
 481 +               case 88200:
 482 +                       sampling_freq=0x08;
 483 +                       break;
 484 +               case 96000:
 485 +                       sampling_freq=0x0a;
 486 +                       break;
 487 +               case 176400:
 488 +                       sampling_freq=0x0c;
 489 +                       break;
 490 +               case 192000:
 491 +                       sampling_freq=0x0e;
 492 +                       break;
 493 +               default:
 494 +                       dev_err(codec->dev,
 495 +                       "Failed to set WM8804 SYSCLK, unsupported samplerate %d\n",
 496 +                       samplerate);
 497 +       }
 498 +
 499 +       snd_soc_dai_set_clkdiv(codec_dai, WM8804_MCLK_DIV, mclk_div);
 500 +       snd_soc_dai_set_pll(codec_dai, 0, 0, sysclk, mclk_freq);
 501 +
 502 +       ret = snd_soc_dai_set_sysclk(codec_dai, WM8804_TX_CLKSRC_PLL,
 503 +                                       sysclk, SND_SOC_CLOCK_OUT);
 504 +       if (ret < 0) {
 505 +               dev_err(codec->dev,
 506 +               "Failed to set WM8804 SYSCLK: %d\n", ret);
 507 +               return ret;
 508 +       }
 509 +
 510 +       /* Enable TX output */
 511 +       snd_soc_update_bits(codec, WM8804_PWRDN, 0x4, 0x0);
 512 +
 513 +       /* Power on */
 514 +       snd_soc_update_bits(codec, WM8804_PWRDN, 0x9, 0);
 515 +
 516 +       /* set sampling frequency status bits */
 517 +       snd_soc_update_bits(codec, WM8804_SPDTX4, 0x0f, sampling_freq);
 518 +
 519 +       return snd_soc_dai_set_bclk_ratio(cpu_dai,64);
 520 +}
 521 +
 522 +/* machine stream operations */
 523 +static struct snd_soc_ops snd_rpi_boomberry_digi_ops = {
 524 +       .hw_params = snd_rpi_boomberry_digi_hw_params,
 525 +        .startup = snd_rpi_boomberry_digi_startup,
 526 +        .shutdown = snd_rpi_boomberry_digi_shutdown,
 527 +};
 528 +
 529 +static struct snd_soc_dai_link snd_rpi_boomberry_digi_dai[] = {
 530 +{
 531 +       .name           = "BoomBerry Digi",
 532 +       .stream_name    = "BoomBerry Digi HiFi",
 533 +       .cpu_dai_name   = "bcm2708-i2s.0",
 534 +       .codec_dai_name = "wm8804-spdif",
 535 +       .platform_name  = "bcm2708-i2s.0",
 536 +       .codec_name     = "wm8804.1-003b",
 537 +       .dai_fmt        = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 538 +                               SND_SOC_DAIFMT_CBM_CFM,
 539 +       .ops            = &snd_rpi_boomberry_digi_ops,
 540 +       .init           = snd_rpi_boomberry_digi_init,
 541 +},
 542 +};
 543 +
 544 +/* audio machine driver */
 545 +static struct snd_soc_card snd_rpi_boomberry_digi = {
 546 +       .name         = "snd_rpi_boomberry_digi",
 547 +       .owner        = THIS_MODULE,
 548 +       .dai_link     = snd_rpi_boomberry_digi_dai,
 549 +       .num_links    = ARRAY_SIZE(snd_rpi_boomberry_digi_dai),
 550 +};
 551 +
 552 +static int snd_rpi_boomberry_digi_probe(struct platform_device *pdev)
 553 +{
 554 +       int ret = 0;
 555 +
 556 +       snd_rpi_boomberry_digi.dev = &pdev->dev;
 557 +
 558 +       if (pdev->dev.of_node) {
 559 +           struct device_node *i2s_node;
 560 +           struct snd_soc_dai_link *dai = &snd_rpi_boomberry_digi_dai[0];
 561 +           i2s_node = of_parse_phandle(pdev->dev.of_node,
 562 +                                       "i2s-controller", 0);
 563 +
 564 +           if (i2s_node) {
 565 +                       dai->cpu_dai_name = NULL;
 566 +                       dai->cpu_of_node = i2s_node;
 567 +                       dai->platform_name = NULL;
 568 +                       dai->platform_of_node = i2s_node;
 569 +           }
 570 +       }
 571 +
 572 +       ret = snd_soc_register_card(&snd_rpi_boomberry_digi);
 573 +       if (ret)
 574 +               dev_err(&pdev->dev,
 575 +                       "snd_soc_register_card() failed: %d\n", ret);
 576 +
 577 +       return ret;
 578 +}
 579 +
 580 +static int snd_rpi_boomberry_digi_remove(struct platform_device *pdev)
 581 +{
 582 +       return snd_soc_unregister_card(&snd_rpi_boomberry_digi);
 583 +}
 584 +
 585 +static const struct of_device_id snd_rpi_boomberry_digi_of_match[] = {
 586 +       { .compatible = "boomberry,boomberry-digi", },
 587 +       {},
 588 +};
 589 +MODULE_DEVICE_TABLE(of, snd_rpi_boomberry_digi_of_match);
 590 +
 591 +static struct platform_driver snd_rpi_boomberry_digi_driver = {
 592 +       .driver = {
 593 +               .name   = "snd-rpi-boomberry-digi",
 594 +               .owner  = THIS_MODULE,
 595 +               .of_match_table = snd_rpi_boomberry_digi_of_match,
 596 +       },
 597 +       .probe          = snd_rpi_boomberry_digi_probe,
 598 +       .remove         = snd_rpi_boomberry_digi_remove,
 599 +};
 600 +
 601 +module_platform_driver(snd_rpi_boomberry_digi_driver);
 602 +
 603 +MODULE_AUTHOR("Milan Neskovic <info@boomberry.co>");
 604 +MODULE_DESCRIPTION("ASoC Driver for BoomBerry PI Digi HAT Sound Card");
 605 +MODULE_LICENSE("GPL v2");