target/linux/brcm2708/patches-4.9/0067-ASoC-Add-support-for-Rpi-DAC.patch

   1 From 3a890b43d08fbfe10895f733578f095a6449ba0b Mon Sep 17 00:00:00 2001
   2 From: Florian Meier <florian.meier@koalo.de>
   3 Date: Mon, 25 Jan 2016 15:48:59 +0000
   4 Subject: [PATCH] ASoC: Add support for Rpi-DAC
   5
   6 ---
   7  sound/soc/bcm/Kconfig       |   7 +++
   8  sound/soc/bcm/Makefile      |   2 +
   9  sound/soc/bcm/rpi-dac.c     | 119 ++++++++++++++++++++++++++++++++++++++++++++
  10  sound/soc/codecs/Kconfig    |   5 ++
  11  sound/soc/codecs/Makefile   |   2 +
  12  sound/soc/codecs/pcm1794a.c |  69 +++++++++++++++++++++++++
  13  6 files changed, 204 insertions(+)
  14  create mode 100644 sound/soc/bcm/rpi-dac.c
  15  create mode 100644 sound/soc/codecs/pcm1794a.c
  16
  17 --- a/sound/soc/bcm/Kconfig
  18 +++ b/sound/soc/bcm/Kconfig
  19 @@ -23,3 +23,10 @@ config SND_BCM2708_SOC_HIFIBERRY_DAC
  20          select SND_SOC_PCM5102A
  21          help
  22           Say Y or M if you want to add support for HifiBerry DAC.
  23 +
  24 +config SND_BCM2708_SOC_RPI_DAC
  25 +        tristate "Support for RPi-DAC"
  26 +        depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
  27 +        select SND_SOC_PCM1794A
  28 +        help
  29 +         Say Y or M if you want to add support for RPi-DAC.
  30 --- a/sound/soc/bcm/Makefile
  31 +++ b/sound/soc/bcm/Makefile
  32 @@ -10,5 +10,7 @@ obj-$(CONFIG_SND_SOC_CYGNUS) += snd-soc-
  33
  34  # BCM2708 Machine Support
  35  snd-soc-hifiberry-dac-objs := hifiberry_dac.o
  36 +snd-soc-rpi-dac-objs := rpi-dac.o
  37
  38  obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DAC) += snd-soc-hifiberry-dac.o
  39 +obj-$(CONFIG_SND_BCM2708_SOC_RPI_DAC) += snd-soc-rpi-dac.o
  40 --- /dev/null
  41 +++ b/sound/soc/bcm/rpi-dac.c
  42 @@ -0,0 +1,119 @@
  43 +/*
  44 + * ASoC Driver for RPi-DAC.
  45 + *
  46 + * Author:     Florian Meier <florian.meier@koalo.de>
  47 + *             Copyright 2013
  48 + *
  49 + * This program is free software; you can redistribute it and/or
  50 + * modify it under the terms of the GNU General Public License
  51 + * version 2 as published by the Free Software Foundation.
  52 + *
  53 + * This program is distributed in the hope that it will be useful, but
  54 + * WITHOUT ANY WARRANTY; without even the implied warranty of
  55 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  56 + * General Public License for more details.
  57 + */
  58 +
  59 +#include <linux/module.h>
  60 +#include <linux/platform_device.h>
  61 +
  62 +#include <sound/core.h>
  63 +#include <sound/pcm.h>
  64 +#include <sound/pcm_params.h>
  65 +#include <sound/soc.h>
  66 +#include <sound/jack.h>
  67 +
  68 +static int snd_rpi_rpi_dac_init(struct snd_soc_pcm_runtime *rtd)
  69 +{
  70 +       return 0;
  71 +}
  72 +
  73 +static int snd_rpi_rpi_dac_hw_params(struct snd_pcm_substream *substream,
  74 +                                      struct snd_pcm_hw_params *params)
  75 +{
  76 +       struct snd_soc_pcm_runtime *rtd = substream->private_data;
  77 +       struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  78 +
  79 +       return snd_soc_dai_set_bclk_ratio(cpu_dai, 32*2);
  80 +}
  81 +
  82 +/* machine stream operations */
  83 +static struct snd_soc_ops snd_rpi_rpi_dac_ops = {
  84 +       .hw_params = snd_rpi_rpi_dac_hw_params,
  85 +};
  86 +
  87 +static struct snd_soc_dai_link snd_rpi_rpi_dac_dai[] = {
  88 +{
  89 +       .name           = "RPi-DAC",
  90 +       .stream_name    = "RPi-DAC HiFi",
  91 +       .cpu_dai_name   = "bcm2708-i2s.0",
  92 +       .codec_dai_name = "pcm1794a-hifi",
  93 +       .platform_name  = "bcm2708-i2s.0",
  94 +       .codec_name     = "pcm1794a-codec",
  95 +       .dai_fmt        = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
  96 +                               SND_SOC_DAIFMT_CBS_CFS,
  97 +       .ops            = &snd_rpi_rpi_dac_ops,
  98 +       .init           = snd_rpi_rpi_dac_init,
  99 +},
 100 +};
 101 +
 102 +/* audio machine driver */
 103 +static struct snd_soc_card snd_rpi_rpi_dac = {
 104 +       .name         = "snd_rpi_rpi_dac",
 105 +       .owner        = THIS_MODULE,
 106 +       .dai_link     = snd_rpi_rpi_dac_dai,
 107 +       .num_links    = ARRAY_SIZE(snd_rpi_rpi_dac_dai),
 108 +};
 109 +
 110 +static int snd_rpi_rpi_dac_probe(struct platform_device *pdev)
 111 +{
 112 +       int ret = 0;
 113 +
 114 +       snd_rpi_rpi_dac.dev = &pdev->dev;
 115 +
 116 +       if (pdev->dev.of_node) {
 117 +               struct device_node *i2s_node;
 118 +               struct snd_soc_dai_link *dai = &snd_rpi_rpi_dac_dai[0];
 119 +               i2s_node = of_parse_phandle(pdev->dev.of_node, "i2s-controller", 0);
 120 +
 121 +               if (i2s_node) {
 122 +                       dai->cpu_dai_name = NULL;
 123 +                       dai->cpu_of_node = i2s_node;
 124 +                       dai->platform_name = NULL;
 125 +                       dai->platform_of_node = i2s_node;
 126 +               }
 127 +       }
 128 +
 129 +       ret = snd_soc_register_card(&snd_rpi_rpi_dac);
 130 +       if (ret)
 131 +               dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n", ret);
 132 +
 133 +       return ret;
 134 +}
 135 +
 136 +static int snd_rpi_rpi_dac_remove(struct platform_device *pdev)
 137 +{
 138 +       return snd_soc_unregister_card(&snd_rpi_rpi_dac);
 139 +}
 140 +
 141 +static const struct of_device_id snd_rpi_rpi_dac_of_match[] = {
 142 +       { .compatible = "rpi,rpi-dac", },
 143 +       {},
 144 +};
 145 +MODULE_DEVICE_TABLE(of, snd_rpi_rpi_dac_of_match);
 146 +
 147 +static struct platform_driver snd_rpi_rpi_dac_driver = {
 148 +        .driver = {
 149 +                .name   = "snd-rpi-dac",
 150 +                .owner  = THIS_MODULE,
 151 +                .of_match_table = snd_rpi_rpi_dac_of_match,
 152 +        },
 153 +        .probe          = snd_rpi_rpi_dac_probe,
 154 +        .remove         = snd_rpi_rpi_dac_remove,
 155 +};
 156 +
 157 +module_platform_driver(snd_rpi_rpi_dac_driver);
 158 +
 159 +MODULE_AUTHOR("Florian Meier <florian.meier@koalo.de>");
 160 +MODULE_DESCRIPTION("ASoC Driver for RPi-DAC");
 161 +MODULE_LICENSE("GPL v2");
 162 --- a/sound/soc/codecs/Kconfig
 163 +++ b/sound/soc/codecs/Kconfig
 164 @@ -98,6 +98,7 @@ config SND_SOC_ALL_CODECS
 165         select SND_SOC_PCM1681 if I2C
 166         select SND_SOC_PCM179X_I2C if I2C
 167         select SND_SOC_PCM179X_SPI if SPI_MASTER
 168 +       select SND_SOC_PCM1794A if I2C
 169         select SND_SOC_PCM3008
 170         select SND_SOC_PCM3168A_I2C if I2C
 171         select SND_SOC_PCM3168A_SPI if SPI_MASTER
 172 @@ -689,6 +690,10 @@ config SND_SOC_RT5616
 173         tristate "Realtek RT5616 CODEC"
 174         depends on I2C
 175
 176 +config SND_SOC_PCM1794A
 177 +       tristate
 178 +       depends on I2C
 179 +
 180  config SND_SOC_RT5631
 181         tristate "Realtek ALC5631/RT5631 CODEC"
 182         depends on I2C
 183 --- a/sound/soc/codecs/Makefile
 184 +++ b/sound/soc/codecs/Makefile
 185 @@ -93,6 +93,7 @@ snd-soc-pcm1681-objs := pcm1681.o
 186  snd-soc-pcm179x-codec-objs := pcm179x.o
 187  snd-soc-pcm179x-i2c-objs := pcm179x-i2c.o
 188  snd-soc-pcm179x-spi-objs := pcm179x-spi.o
 189 +snd-soc-pcm1794a-objs := pcm1794a.o
 190  snd-soc-pcm3008-objs := pcm3008.o
 191  snd-soc-pcm3168a-objs := pcm3168a.o
 192  snd-soc-pcm3168a-i2c-objs := pcm3168a-i2c.o
 193 @@ -325,6 +326,7 @@ obj-$(CONFIG_SND_SOC_PCM5102A)      += snd-so
 194  obj-$(CONFIG_SND_SOC_PCM512x)  += snd-soc-pcm512x.o
 195  obj-$(CONFIG_SND_SOC_PCM512x_I2C)      += snd-soc-pcm512x-i2c.o
 196  obj-$(CONFIG_SND_SOC_PCM512x_SPI)      += snd-soc-pcm512x-spi.o
 197 +obj-$(CONFIG_SND_SOC_PCM1794A) += snd-soc-pcm1794a.o
 198  obj-$(CONFIG_SND_SOC_RL6231)   += snd-soc-rl6231.o
 199  obj-$(CONFIG_SND_SOC_RL6347A)  += snd-soc-rl6347a.o
 200  obj-$(CONFIG_SND_SOC_RT286)    += snd-soc-rt286.o
 201 --- /dev/null
 202 +++ b/sound/soc/codecs/pcm1794a.c
 203 @@ -0,0 +1,69 @@
 204 +/*
 205 + * Driver for the PCM1794A codec
 206 + *
 207 + * Author:     Florian Meier <florian.meier@koalo.de>
 208 + *             Copyright 2013
 209 + *
 210 + * This program is free software; you can redistribute it and/or
 211 + * modify it under the terms of the GNU General Public License
 212 + * version 2 as published by the Free Software Foundation.
 213 + *
 214 + * This program is distributed in the hope that it will be useful, but
 215 + * WITHOUT ANY WARRANTY; without even the implied warranty of
 216 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 217 + * General Public License for more details.
 218 + */
 219 +
 220 +
 221 +#include <linux/init.h>
 222 +#include <linux/module.h>
 223 +#include <linux/platform_device.h>
 224 +
 225 +#include <sound/soc.h>
 226 +
 227 +static struct snd_soc_dai_driver pcm1794a_dai = {
 228 +       .name = "pcm1794a-hifi",
 229 +       .playback = {
 230 +               .channels_min = 2,
 231 +               .channels_max = 2,
 232 +               .rates = SNDRV_PCM_RATE_8000_192000,
 233 +               .formats = SNDRV_PCM_FMTBIT_S16_LE |
 234 +                          SNDRV_PCM_FMTBIT_S24_LE
 235 +       },
 236 +};
 237 +
 238 +static struct snd_soc_codec_driver soc_codec_dev_pcm1794a;
 239 +
 240 +static int pcm1794a_probe(struct platform_device *pdev)
 241 +{
 242 +       return snd_soc_register_codec(&pdev->dev, &soc_codec_dev_pcm1794a,
 243 +                       &pcm1794a_dai, 1);
 244 +}
 245 +
 246 +static int pcm1794a_remove(struct platform_device *pdev)
 247 +{
 248 +       snd_soc_unregister_codec(&pdev->dev);
 249 +       return 0;
 250 +}
 251 +
 252 +static const struct of_device_id pcm1794a_of_match[] = {
 253 +       { .compatible = "ti,pcm1794a", },
 254 +       { }
 255 +};
 256 +MODULE_DEVICE_TABLE(of, pcm1794a_of_match);
 257 +
 258 +static struct platform_driver pcm1794a_codec_driver = {
 259 +       .probe          = pcm1794a_probe,
 260 +       .remove         = pcm1794a_remove,
 261 +       .driver         = {
 262 +               .name   = "pcm1794a-codec",
 263 +               .owner  = THIS_MODULE,
 264 +               .of_match_table = of_match_ptr(pcm1794a_of_match),
 265 +       },
 266 +};
 267 +
 268 +module_platform_driver(pcm1794a_codec_driver);
 269 +
 270 +MODULE_DESCRIPTION("ASoC PCM1794A codec driver");
 271 +MODULE_AUTHOR("Florian Meier <florian.meier@koalo.de>");
 272 +MODULE_LICENSE("GPL v2");