target/linux/brcm2708/patches-4.19/950-0421-Added-IQaudIO-Pi-Codec-board-support-2969.patch

   1 From 930c49de8674acda0f143f7bc182ed2fad8c4f9d Mon Sep 17 00:00:00 2001
   2 From: IQaudIO <gordon@iqaudio.com>
   3 Date: Mon, 13 May 2019 21:53:05 +0100
   4 Subject: [PATCH] Added IQaudIO Pi-Codec board support (#2969)
   5
   6 Add support for the IQaudIO Pi-Codec board.
   7
   8 Signed-off-by: Gordon <gordon@iqaudio.com>
   9 ---
  10  arch/arm/boot/dts/overlays/Makefile           |   1 +
  11  arch/arm/boot/dts/overlays/README             |   6 +
  12  .../dts/overlays/iqaudio-codec-overlay.dts    |  42 +++
  13  sound/soc/bcm/Kconfig                         |   7 +
  14  sound/soc/bcm/Makefile                        |   2 +
  15  sound/soc/bcm/iqaudio-codec.c                 | 250 ++++++++++++++++++
  16  9 files changed, 311 insertions(+)
  17  create mode 100644 arch/arm/boot/dts/overlays/iqaudio-codec-overlay.dts
  18  create mode 100644 sound/soc/bcm/iqaudio-codec.c
  19
  20 --- a/arch/arm/boot/dts/overlays/Makefile
  21 +++ b/arch/arm/boot/dts/overlays/Makefile
  22 @@ -68,6 +68,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
  23         i2c1-bcm2708.dtbo \
  24         i2s-gpio28-31.dtbo \
  25         ilitek251x.dtbo \
  26 +       iqaudio-codec.dtbo \
  27         iqaudio-dac.dtbo \
  28         iqaudio-dacplus.dtbo \
  29         iqaudio-digi-wm8804-audio.dtbo \
  30 --- a/arch/arm/boot/dts/overlays/README
  31 +++ b/arch/arm/boot/dts/overlays/README
  32 @@ -1160,6 +1160,12 @@ Params: interrupt               GPIO use
  33                                  touchscreen (in pixels)
  34
  35
  36 +Name:   iqaudio-codec
  37 +Info:   Configures the IQaudio Codec audio card
  38 +Load:   dtoverlay=iqaudio-codec
  39 +Params: <None>
  40 +
  41 +
  42  Name:   iqaudio-dac
  43  Info:   Configures the IQaudio DAC audio card
  44  Load:   dtoverlay=iqaudio-dac,<param>
  45 --- /dev/null
  46 +++ b/arch/arm/boot/dts/overlays/iqaudio-codec-overlay.dts
  47 @@ -0,0 +1,42 @@
  48 +// Definitions for IQaudIO CODEC
  49 +/dts-v1/;
  50 +/plugin/;
  51 +
  52 +/ {
  53 +       compatible = "brcm,bcm2708";
  54 +
  55 +       fragment@0 {
  56 +               target = <&i2s>;
  57 +               __overlay__ {
  58 +                       status = "okay";
  59 +               };
  60 +       };
  61 +
  62 +       fragment@1 {
  63 +               target = <&i2c1>;
  64 +               __overlay__ {
  65 +                       #address-cells = <1>;
  66 +                       #size-cells = <0>;
  67 +                       status = "okay";
  68 +
  69 +                       da2713@1a {
  70 +                               #sound-dai-cells = <0>;
  71 +                               compatible = "dlg,da7213";
  72 +                               reg = <0x1a>;
  73 +                               status = "okay";
  74 +                       };
  75 +               };
  76 +       };
  77 +
  78 +       fragment@2 {
  79 +               target = <&sound>;
  80 +               iqaudio_dac: __overlay__ {
  81 +                       compatible = "iqaudio,iqaudio-codec";
  82 +                       i2s-controller = <&i2s>;
  83 +                       status = "okay";
  84 +               };
  85 +       };
  86 +
  87 +       __overrides__ {
  88 +       };
  89 +};
  90 --- a/sound/soc/bcm/Kconfig
  91 +++ b/sound/soc/bcm/Kconfig
  92 @@ -108,6 +108,13 @@ config SND_BCM2708_SOC_JUSTBOOM_DIGI
  93         help
  94           Say Y or M if you want to add support for JustBoom Digi.
  95
  96 +config SND_BCM2708_SOC_IQAUDIO_CODEC
  97 +       tristate "Support for IQaudIO-CODEC"
  98 +       depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
  99 +       select SND_SOC_DA7213
 100 +       help
 101 +         Say Y or M if you want to add support for IQaudIO-CODEC.
 102 +
 103  config SND_BCM2708_SOC_IQAUDIO_DAC
 104         tristate "Support for IQaudIO-DAC"
 105         depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
 106 --- a/sound/soc/bcm/Makefile
 107 +++ b/sound/soc/bcm/Makefile
 108 @@ -18,6 +18,7 @@ snd-soc-hifiberry-dacplusadc-objs := hif
 109  snd-soc-justboom-dac-objs := justboom-dac.o
 110  snd-soc-rpi-cirrus-objs := rpi-cirrus.o
 111  snd-soc-rpi-proto-objs := rpi-proto.o
 112 +snd-soc-iqaudio-codec-objs := iqaudio-codec.o
 113  snd-soc-iqaudio-dac-objs := iqaudio-dac.o
 114   snd-soc-i-sabre-q2m-objs := i-sabre-q2m.o
 115  snd-soc-audioinjector-pi-soundcard-objs := audioinjector-pi-soundcard.o
 116 @@ -42,6 +43,7 @@ obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_D
 117  obj-$(CONFIG_SND_BCM2708_SOC_JUSTBOOM_DAC) += snd-soc-justboom-dac.o
 118  obj-$(CONFIG_SND_BCM2708_SOC_RPI_CIRRUS) += snd-soc-rpi-cirrus.o
 119  obj-$(CONFIG_SND_BCM2708_SOC_RPI_PROTO) += snd-soc-rpi-proto.o
 120 +obj-$(CONFIG_SND_BCM2708_SOC_IQAUDIO_CODEC) += snd-soc-iqaudio-codec.o
 121  obj-$(CONFIG_SND_BCM2708_SOC_IQAUDIO_DAC) += snd-soc-iqaudio-dac.o
 122   obj-$(CONFIG_SND_BCM2708_SOC_I_SABRE_Q2M) += snd-soc-i-sabre-q2m.o
 123  obj-$(CONFIG_SND_AUDIOINJECTOR_PI_SOUNDCARD) += snd-soc-audioinjector-pi-soundcard.o
 124 --- /dev/null
 125 +++ b/sound/soc/bcm/iqaudio-codec.c
 126 @@ -0,0 +1,250 @@
 127 +/*
 128 + * ASoC Driver for IQaudIO Raspberry Pi Codec board
 129 + *
 130 + * Author:     Gordon Garrity <gordon@iqaudio.com>
 131 + *             (C) Copyright IQaudio Limited, 2017-2019
 132 + *
 133 + * This program is free software; you can redistribute it and/or
 134 + * modify it under the terms of the GNU General Public License
 135 + * version 2 as published by the Free Software Foundation.
 136 + *
 137 + * This program is distributed in the hope that it will be useful, but
 138 + * WITHOUT ANY WARRANTY; without even the implied warranty of
 139 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 140 + * General Public License for more details.
 141 + */
 142 +
 143 +#include <linux/module.h>
 144 +#include <linux/gpio/consumer.h>
 145 +#include <linux/platform_device.h>
 146 +
 147 +#include <sound/core.h>
 148 +#include <sound/pcm.h>
 149 +#include <sound/pcm_params.h>
 150 +#include <sound/soc.h>
 151 +#include <sound/jack.h>
 152 +
 153 +#include <linux/acpi.h>
 154 +#include <linux/slab.h>
 155 +#include "../codecs/da7213.h"
 156 +
 157 +static int pll_out = DA7213_PLL_FREQ_OUT_90316800;
 158 +
 159 +static int snd_rpi_iqaudio_pll_control(struct snd_soc_dapm_widget *w,
 160 +                                      struct snd_kcontrol *k, int  event)
 161 +{
 162 +       int ret = 0;
 163 +       struct snd_soc_dapm_context *dapm = w->dapm;
 164 +       struct snd_soc_card *card = dapm->card;
 165 +       struct snd_soc_pcm_runtime *rtd =
 166 +               snd_soc_get_pcm_runtime(card, card->dai_link[0].name);
 167 +       struct snd_soc_dai *codec_dai = rtd->codec_dai;
 168 +
 169 +       if (SND_SOC_DAPM_EVENT_OFF(event)) {
 170 +               ret = snd_soc_dai_set_pll(codec_dai, 0, DA7213_SYSCLK_MCLK, 0,
 171 +                                         0);
 172 +               if (ret)
 173 +                       dev_err(card->dev, "Failed to bypass PLL: %d\n", ret);
 174 +       } else if (SND_SOC_DAPM_EVENT_ON(event)) {
 175 +               ret = snd_soc_dai_set_pll(codec_dai, 0, DA7213_SYSCLK_PLL, 0,
 176 +                                         pll_out);
 177 +               if (ret)
 178 +                       dev_err(card->dev, "Failed to enable PLL: %d\n", ret);
 179 +       }
 180 +
 181 +       return ret;
 182 +}
 183 +
 184 +static int snd_rpi_iqaudio_post_dapm_event(struct snd_soc_dapm_widget *w,
 185 +                              struct snd_kcontrol *kcontrol,
 186 +                              int event)
 187 +{
 188 +     switch (event) {
 189 +     case SND_SOC_DAPM_POST_PMU:
 190 +           /* Delay for mic bias ramp */
 191 +           msleep(1000);
 192 +           break;
 193 +     default:
 194 +           break;
 195 +     }
 196 +
 197 +     return 0;
 198 +}
 199 +
 200 +static const struct snd_soc_dapm_widget dapm_widgets[] = {
 201 +       SND_SOC_DAPM_HP("HP Jack", NULL),
 202 +       SND_SOC_DAPM_MIC("MIC Jack", NULL),
 203 +       SND_SOC_DAPM_MIC("Onboard MIC", NULL),
 204 +       SND_SOC_DAPM_LINE("AUX Jack", NULL),
 205 +       SND_SOC_DAPM_SUPPLY("PLL Control", SND_SOC_NOPM, 0, 0,
 206 +                           snd_rpi_iqaudio_pll_control,
 207 +                           SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
 208 +       SND_SOC_DAPM_POST("Post Power Up Event", snd_rpi_iqaudio_post_dapm_event),
 209 +};
 210 +
 211 +static const struct snd_soc_dapm_route audio_map[] = {
 212 +       {"HP Jack", NULL, "HPL"},
 213 +       {"HP Jack", NULL, "HPR"},
 214 +       {"HP Jack", NULL, "PLL Control"},
 215 +
 216 +       {"AUX Jack", NULL, "AUXR"},
 217 +       {"AUX Jack", NULL, "AUXL"},
 218 +       {"AUX Jack", NULL, "PLL Control"},
 219 +
 220 +       /* Assume Mic1 is linked to Headset and Mic2 to on-board mic */
 221 +       {"MIC Jack", NULL, "MIC1"},
 222 +       {"MIC Jack", NULL, "PLL Control"},
 223 +       {"Onboard MIC", NULL, "MIC2"},
 224 +       {"Onboard MIC", NULL, "PLL Control"},
 225 +};
 226 +
 227 +/* machine stream operations */
 228 +
 229 +static int snd_rpi_iqaudio_codec_init(struct snd_soc_pcm_runtime *rtd)
 230 +{
 231 +       struct snd_soc_dai *codec_dai = rtd->codec_dai;
 232 +       struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 233 +       int ret;
 234 +
 235 +       /* Set bclk ratio to align with codec's BCLK rate */
 236 +       ret = snd_soc_dai_set_bclk_ratio(cpu_dai, 64);
 237 +       if (ret) {
 238 +               dev_err(rtd->dev, "Failed to set CPU BLCK ratio\n");
 239 +               return ret;
 240 +       }
 241 +
 242 +       /* Set MCLK frequency to codec, onboard 11.2896MHz clock */
 243 +       return snd_soc_dai_set_sysclk(codec_dai, DA7213_CLKSRC_MCLK, 11289600,
 244 +                                     SND_SOC_CLOCK_OUT);
 245 +}
 246 +
 247 +static int snd_rpi_iqaudio_codec_hw_params(struct snd_pcm_substream *substream,
 248 +                                          struct snd_pcm_hw_params *params)
 249 +{
 250 +       struct snd_soc_pcm_runtime *rtd = substream->private_data;
 251 +       unsigned int samplerate = params_rate(params);
 252 +
 253 +       switch (samplerate) {
 254 +       case  8000:
 255 +       case 16000:
 256 +       case 32000:
 257 +       case 48000:
 258 +       case 96000:
 259 +               pll_out = DA7213_PLL_FREQ_OUT_98304000;
 260 +               return 0;
 261 +       case 44100:
 262 +       case 88200:
 263 +               pll_out = DA7213_PLL_FREQ_OUT_90316800;
 264 +               return 0;
 265 +       default:
 266 +               dev_err(rtd->dev,"Unsupported samplerate %d\n", samplerate);
 267 +               return -EINVAL;
 268 +       }
 269 +}
 270 +
 271 +static const struct snd_soc_ops snd_rpi_iqaudio_codec_ops = {
 272 +       .hw_params = snd_rpi_iqaudio_codec_hw_params,
 273 +};
 274 +
 275 +
 276 +static struct snd_soc_dai_link snd_rpi_iqaudio_codec_dai[] = {
 277 +{
 278 +       .cpu_dai_name           = "bcm2708-i2s.0",
 279 +       .codec_dai_name         = "da7213-hifi",
 280 +       .platform_name          = "bmc2708-i2s.0",
 281 +       .codec_name             = "da7213.1-001a",
 282 +       .dai_fmt                = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 283 +                                 SND_SOC_DAIFMT_CBM_CFM,
 284 +       .init                   = snd_rpi_iqaudio_codec_init,
 285 +       .ops                    = &snd_rpi_iqaudio_codec_ops,
 286 +       .symmetric_rates        = 1,
 287 +       .symmetric_channels     = 1,
 288 +       .symmetric_samplebits   = 1,
 289 +},
 290 +};
 291 +
 292 +/* audio machine driver */
 293 +static struct snd_soc_card snd_rpi_iqaudio_codec = {
 294 +       .owner                  = THIS_MODULE,
 295 +       .dai_link               = snd_rpi_iqaudio_codec_dai,
 296 +       .num_links              = ARRAY_SIZE(snd_rpi_iqaudio_codec_dai),
 297 +       .dapm_widgets           = dapm_widgets,
 298 +       .num_dapm_widgets       = ARRAY_SIZE(dapm_widgets),
 299 +       .dapm_routes            = audio_map,
 300 +       .num_dapm_routes        = ARRAY_SIZE(audio_map),
 301 +};
 302 +
 303 +static int snd_rpi_iqaudio_codec_probe(struct platform_device *pdev)
 304 +{
 305 +       int ret = 0;
 306 +
 307 +       snd_rpi_iqaudio_codec.dev = &pdev->dev;
 308 +
 309 +       if (pdev->dev.of_node) {
 310 +               struct device_node *i2s_node;
 311 +               struct snd_soc_card *card = &snd_rpi_iqaudio_codec;
 312 +               struct snd_soc_dai_link *dai = &snd_rpi_iqaudio_codec_dai[0];
 313 +
 314 +               i2s_node = of_parse_phandle(pdev->dev.of_node,
 315 +                                           "i2s-controller", 0);
 316 +               if (i2s_node) {
 317 +                       dai->cpu_dai_name = NULL;
 318 +                       dai->cpu_of_node = i2s_node;
 319 +                       dai->platform_name = NULL;
 320 +                       dai->platform_of_node = i2s_node;
 321 +               }
 322 +
 323 +               if (of_property_read_string(pdev->dev.of_node, "card_name",
 324 +                                           &card->name))
 325 +                       card->name = "IQaudIOCODEC";
 326 +
 327 +               if (of_property_read_string(pdev->dev.of_node, "dai_name",
 328 +                                           &dai->name))
 329 +                       dai->name = "IQaudIO CODEC";
 330 +
 331 +               if (of_property_read_string(pdev->dev.of_node,
 332 +                                       "dai_stream_name", &dai->stream_name))
 333 +                       dai->stream_name = "IQaudIO CODEC HiFi v1.1";
 334 +
 335 +       }
 336 +
 337 +       ret = snd_soc_register_card(&snd_rpi_iqaudio_codec);
 338 +       if (ret) {
 339 +               if (ret != -EPROBE_DEFER)
 340 +                       dev_err(&pdev->dev,
 341 +                               "snd_soc_register_card() failed: %d\n", ret);
 342 +               return ret;
 343 +       }
 344 +
 345 +       return 0;
 346 +}
 347 +
 348 +static int snd_rpi_iqaudio_codec_remove(struct platform_device *pdev)
 349 +{
 350 +       return snd_soc_unregister_card(&snd_rpi_iqaudio_codec);
 351 +}
 352 +
 353 +static const struct of_device_id iqaudio_of_match[] = {
 354 +       { .compatible = "iqaudio,iqaudio-codec", },
 355 +       {},
 356 +};
 357 +
 358 +MODULE_DEVICE_TABLE(of, iqaudio_of_match);
 359 +
 360 +static struct platform_driver snd_rpi_iqaudio_codec_driver = {
 361 +       .driver = {
 362 +               .name   = "snd-rpi-iqaudio-codec",
 363 +               .owner  = THIS_MODULE,
 364 +               .of_match_table = iqaudio_of_match,
 365 +       },
 366 +       .probe          = snd_rpi_iqaudio_codec_probe,
 367 +       .remove         = snd_rpi_iqaudio_codec_remove,
 368 +};
 369 +
 370 +
 371 +
 372 +module_platform_driver(snd_rpi_iqaudio_codec_driver);
 373 +
 374 +MODULE_AUTHOR("Gordon Garrity <gordon@iqaudio.com>");
 375 +MODULE_DESCRIPTION("ASoC Driver for IQaudIO CODEC");
 376 +MODULE_LICENSE("GPL v2");