target/linux/brcm2708/patches-4.9/0081-Add-IQAudIO-Digi-WM8804-board-support.patch

   1 From 1b18f3be9f034c2e9aefab9b97c5100d5f914a89 Mon Sep 17 00:00:00 2001
   2 From: DigitalDreamtime <clive.messer@digitaldreamtime.co.uk>
   3 Date: Thu, 30 Jun 2016 18:38:42 +0100
   4 Subject: [PATCH] Add IQAudIO Digi WM8804 board support
   5
   6 Support IQAudIO Digi board with iqaudio_digi machine driver and
   7  iqaudio-digi-wm8804-audio overlay.
   8
   9 NB. Machine driver is a cut and paste of hifiberry_digi code, with format
  10     and general cleanup to comply with kernel coding standards.
  11
  12 Signed-off-by: DigitalDreamtime <clive.messer@digitaldreamtime.co.uk>
  13 ---
  14  sound/soc/bcm/Kconfig        |   7 ++
  15  sound/soc/bcm/Makefile       |   2 +
  16  sound/soc/bcm/iqaudio_digi.c | 239 +++++++++++++++++++++++++++++++++++++++++++
  17  3 files changed, 248 insertions(+)
  18  create mode 100644 sound/soc/bcm/iqaudio_digi.c
  19
  20 --- a/sound/soc/bcm/Kconfig
  21 +++ b/sound/soc/bcm/Kconfig
  22 @@ -73,6 +73,13 @@ config SND_BCM2708_SOC_IQAUDIO_DAC
  23         help
  24           Say Y or M if you want to add support for IQaudIO-DAC.
  25
  26 +config SND_BCM2708_SOC_IQAUDIO_DIGI
  27 +        tristate "Support for IQAudIO Digi"
  28 +        depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
  29 +        select SND_SOC_WM8804
  30 +        help
  31 +         Say Y or M if you want to add support for IQAudIO Digital IO board.
  32 +
  33  config SND_BCM2708_SOC_RASPIDAC3
  34         tristate "Support for RaspiDAC Rev.3x"
  35         depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
  36 --- a/sound/soc/bcm/Makefile
  37 +++ b/sound/soc/bcm/Makefile
  38 @@ -18,6 +18,7 @@ snd-soc-justboom-digi-objs := justboom-d
  39  snd-soc-rpi-dac-objs := rpi-dac.o
  40  snd-soc-rpi-proto-objs := rpi-proto.o
  41  snd-soc-iqaudio-dac-objs := iqaudio-dac.o
  42 +snd-soc-iqaudio-digi-objs := iqaudio_digi.o
  43  snd-soc-raspidac3-objs := raspidac3.o
  44  snd-soc-audioinjector-pi-soundcard-objs := audioinjector-pi-soundcard.o
  45
  46 @@ -30,6 +31,7 @@ obj-$(CONFIG_SND_BCM2708_SOC_JUSTBOOM_DI
  47  obj-$(CONFIG_SND_BCM2708_SOC_RPI_DAC) += snd-soc-rpi-dac.o
  48  obj-$(CONFIG_SND_BCM2708_SOC_RPI_PROTO) += snd-soc-rpi-proto.o
  49  obj-$(CONFIG_SND_BCM2708_SOC_IQAUDIO_DAC) += snd-soc-iqaudio-dac.o
  50 +obj-$(CONFIG_SND_BCM2708_SOC_IQAUDIO_DIGI) += snd-soc-iqaudio-digi.o
  51  obj-$(CONFIG_SND_BCM2708_SOC_RASPIDAC3) += snd-soc-raspidac3.o
  52  obj-$(CONFIG_SND_AUDIOINJECTOR_PI_SOUNDCARD) += snd-soc-audioinjector-pi-soundcard.o
  53
  54 --- /dev/null
  55 +++ b/sound/soc/bcm/iqaudio_digi.c
  56 @@ -0,0 +1,239 @@
  57 +/*
  58 + * ASoC Driver for IQAudIO WM8804 Digi
  59 + *
  60 + * Author: Daniel Matuschek <info@crazy-audio.com>
  61 + * based on the HifiBerry DAC driver by Florian Meier <florian.meier@koalo.de>
  62 + *     Copyright 2013
  63 + *
  64 + * This program is free software; you can redistribute it and/or
  65 + * modify it under the terms of the GNU General Public License
  66 + * version 2 as published by the Free Software Foundation.
  67 + *
  68 + * This program is distributed in the hope that it will be useful, but
  69 + * WITHOUT ANY WARRANTY; without even the implied warranty of
  70 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  71 + * General Public License for more details.
  72 + */
  73 +
  74 +#include <linux/module.h>
  75 +#include <linux/platform_device.h>
  76 +
  77 +#include <sound/core.h>
  78 +#include <sound/pcm.h>
  79 +#include <sound/pcm_params.h>
  80 +#include <sound/soc.h>
  81 +#include <sound/jack.h>
  82 +
  83 +#include "../codecs/wm8804.h"
  84 +
  85 +static short int auto_shutdown_output;
  86 +module_param(auto_shutdown_output, short,
  87 +             S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP);
  88 +MODULE_PARM_DESC(auto_shutdown_output, "Shutdown SP/DIF output if playback is stopped");
  89 +
  90 +static int snd_rpi_iqaudio_digi_init(struct snd_soc_pcm_runtime *rtd)
  91 +{
  92 +       struct snd_soc_codec *codec = rtd->codec;
  93 +
  94 +       /* enable TX output */
  95 +       snd_soc_update_bits(codec, WM8804_PWRDN, 0x4, 0x0);
  96 +
  97 +       return 0;
  98 +}
  99 +
 100 +static int snd_rpi_iqaudio_digi_startup(struct snd_pcm_substream *substream)
 101 +{
 102 +       struct snd_soc_pcm_runtime *rtd = substream->private_data;
 103 +       struct snd_soc_codec *codec = rtd->codec;
 104 +
 105 +       /* turn on digital output */
 106 +       snd_soc_update_bits(codec, WM8804_PWRDN, 0x3c, 0x00);
 107 +
 108 +       return 0;
 109 +}
 110 +
 111 +static void snd_rpi_iqaudio_digi_shutdown(struct snd_pcm_substream *substream)
 112 +{
 113 +       if (auto_shutdown_output) {
 114 +               struct snd_soc_pcm_runtime *rtd = substream->private_data;
 115 +               struct snd_soc_codec *codec = rtd->codec;
 116 +
 117 +               /* turn off digital output */
 118 +               snd_soc_update_bits(codec, WM8804_PWRDN, 0x3c, 0x3c);
 119 +       }
 120 +}
 121 +
 122 +
 123 +static int snd_rpi_iqaudio_digi_hw_params(struct snd_pcm_substream *substream,
 124 +       struct snd_pcm_hw_params *params)
 125 +{
 126 +       struct snd_soc_pcm_runtime *rtd = substream->private_data;
 127 +       struct snd_soc_dai *codec_dai = rtd->codec_dai;
 128 +       struct snd_soc_codec *codec = rtd->codec;
 129 +       struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 130 +
 131 +       int sysclk = 27000000; /* This is fixed on this board */
 132 +
 133 +       long mclk_freq = 0;
 134 +       int mclk_div = 1;
 135 +       int sampling_freq = 1;
 136 +
 137 +       int ret;
 138 +
 139 +       int samplerate = params_rate(params);
 140 +
 141 +       if (samplerate <= 96000) {
 142 +               mclk_freq = samplerate * 256;
 143 +               mclk_div = WM8804_MCLKDIV_256FS;
 144 +       } else {
 145 +               mclk_freq = samplerate * 128;
 146 +               mclk_div = WM8804_MCLKDIV_128FS;
 147 +       }
 148 +
 149 +       switch (samplerate) {
 150 +       case 32000:
 151 +               sampling_freq = 0x03;
 152 +               break;
 153 +       case 44100:
 154 +               sampling_freq = 0x00;
 155 +               break;
 156 +       case 48000:
 157 +               sampling_freq = 0x02;
 158 +               break;
 159 +       case 88200:
 160 +               sampling_freq = 0x08;
 161 +               break;
 162 +       case 96000:
 163 +               sampling_freq = 0x0a;
 164 +               break;
 165 +       case 176400:
 166 +               sampling_freq = 0x0c;
 167 +               break;
 168 +       case 192000:
 169 +               sampling_freq = 0x0e;
 170 +               break;
 171 +       default:
 172 +               dev_err(codec->dev, "Failed to set WM8804 SYSCLK, unsupported samplerate %d\n",
 173 +                       samplerate);
 174 +       }
 175 +
 176 +       snd_soc_dai_set_clkdiv(codec_dai, WM8804_MCLK_DIV, mclk_div);
 177 +       snd_soc_dai_set_pll(codec_dai, 0, 0, sysclk, mclk_freq);
 178 +
 179 +       ret = snd_soc_dai_set_sysclk(codec_dai, WM8804_TX_CLKSRC_PLL,
 180 +                                       sysclk, SND_SOC_CLOCK_OUT);
 181 +       if (ret < 0) {
 182 +               dev_err(codec->dev, "Failed to set WM8804 SYSCLK: %d\n", ret);
 183 +               return ret;
 184 +       }
 185 +
 186 +       /* Enable TX output */
 187 +       snd_soc_update_bits(codec, WM8804_PWRDN, 0x4, 0x0);
 188 +
 189 +       /* Power on */
 190 +       snd_soc_update_bits(codec, WM8804_PWRDN, 0x9, 0);
 191 +
 192 +       /* set sampling frequency status bits */
 193 +       snd_soc_update_bits(codec, WM8804_SPDTX4, 0x0f, sampling_freq);
 194 +
 195 +       return snd_soc_dai_set_bclk_ratio(cpu_dai, 64);
 196 +}
 197 +
 198 +/* machine stream operations */
 199 +static struct snd_soc_ops snd_rpi_iqaudio_digi_ops = {
 200 +       .hw_params      = snd_rpi_iqaudio_digi_hw_params,
 201 +       .startup        = snd_rpi_iqaudio_digi_startup,
 202 +       .shutdown       = snd_rpi_iqaudio_digi_shutdown,
 203 +};
 204 +
 205 +static struct snd_soc_dai_link snd_rpi_iqaudio_digi_dai[] = {
 206 +{
 207 +       .name           = "IQAudIO Digi",
 208 +       .stream_name    = "IQAudIO Digi HiFi",
 209 +       .cpu_dai_name   = "bcm2708-i2s.0",
 210 +       .codec_dai_name = "wm8804-spdif",
 211 +       .platform_name  = "bcm2708-i2s.0",
 212 +       .codec_name     = "wm8804.1-003b",
 213 +       .dai_fmt        = SND_SOC_DAIFMT_I2S |
 214 +                         SND_SOC_DAIFMT_NB_NF |
 215 +                         SND_SOC_DAIFMT_CBM_CFM,
 216 +       .ops            = &snd_rpi_iqaudio_digi_ops,
 217 +       .init           = snd_rpi_iqaudio_digi_init,
 218 +},
 219 +};
 220 +
 221 +/* audio machine driver */
 222 +static struct snd_soc_card snd_rpi_iqaudio_digi = {
 223 +       .name           = "IQAudIODigi",
 224 +       .owner          = THIS_MODULE,
 225 +       .dai_link       = snd_rpi_iqaudio_digi_dai,
 226 +       .num_links      = ARRAY_SIZE(snd_rpi_iqaudio_digi_dai),
 227 +};
 228 +
 229 +static int snd_rpi_iqaudio_digi_probe(struct platform_device *pdev)
 230 +{
 231 +       struct snd_soc_card *card = &snd_rpi_iqaudio_digi;
 232 +       char *prefix = "wm8804-digi,";
 233 +       char prop[128];
 234 +       struct device_node *np;
 235 +       int ret = 0;
 236 +
 237 +       snd_rpi_iqaudio_digi.dev = &pdev->dev;
 238 +
 239 +       np = pdev->dev.of_node;
 240 +       if (np) {
 241 +               struct snd_soc_dai_link *dai = &snd_rpi_iqaudio_digi_dai[0];
 242 +               struct device_node *i2s_node;
 243 +
 244 +               i2s_node = of_parse_phandle(np, "i2s-controller", 0);
 245 +               if (i2s_node) {
 246 +                       dai->cpu_dai_name = NULL;
 247 +                       dai->cpu_of_node = i2s_node;
 248 +                       dai->platform_name = NULL;
 249 +                       dai->platform_of_node = i2s_node;
 250 +               }
 251 +
 252 +               snprintf(prop, sizeof(prop), "%scard-name", prefix);
 253 +               of_property_read_string(np, prop, &card->name);
 254 +
 255 +               snprintf(prop, sizeof(prop), "%sdai-name", prefix);
 256 +               of_property_read_string(np, prop, &dai->name);
 257 +
 258 +               snprintf(prop, sizeof(prop), "%sdai-stream-name", prefix);
 259 +               of_property_read_string(np, prop, &dai->stream_name);
 260 +       }
 261 +
 262 +       ret = snd_soc_register_card(card);
 263 +       if (ret)
 264 +               dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
 265 +                       ret);
 266 +
 267 +       return ret;
 268 +}
 269 +
 270 +static int snd_rpi_iqaudio_digi_remove(struct platform_device *pdev)
 271 +{
 272 +       return snd_soc_unregister_card(&snd_rpi_iqaudio_digi);
 273 +}
 274 +
 275 +static const struct of_device_id snd_rpi_iqaudio_digi_of_match[] = {
 276 +       { .compatible = "iqaudio,wm8804-digi", },
 277 +       {},
 278 +};
 279 +MODULE_DEVICE_TABLE(of, snd_rpi_iqaudio_digi_of_match);
 280 +
 281 +static struct platform_driver snd_rpi_iqaudio_digi_driver = {
 282 +       .driver = {
 283 +               .name           = "IQAudIODigi",
 284 +               .owner          = THIS_MODULE,
 285 +               .of_match_table = snd_rpi_iqaudio_digi_of_match,
 286 +       },
 287 +       .probe  = snd_rpi_iqaudio_digi_probe,
 288 +       .remove = snd_rpi_iqaudio_digi_remove,
 289 +};
 290 +
 291 +module_platform_driver(snd_rpi_iqaudio_digi_driver);
 292 +
 293 +MODULE_AUTHOR("Daniel Matuschek <info@crazy-audio.com>");
 294 +MODULE_DESCRIPTION("ASoC Driver for IQAudIO WM8804 Digi");
 295 +MODULE_LICENSE("GPL v2");