target/linux/brcm2708/patches-4.4/0064-ASoC-Add-support-for-Rpi-DAC.patch

   1 From 26ee57a5d9cd05e006b277446c9535aeda3c93d6 Mon Sep 17 00:00:00 2001
   2 From: Florian Meier <florian.meier@koalo.de>
   3 Date: Fri, 22 Nov 2013 19:21:34 +0100
   4 Subject: [PATCH 064/304] 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     | 118 ++++++++++++++++++++++++++++++++++++++++++++
  10  sound/soc/codecs/Kconfig    |   9 ++++
  11  sound/soc/codecs/Makefile   |   2 +
  12  sound/soc/codecs/pcm1794a.c |  69 ++++++++++++++++++++++++++
  13  6 files changed, 207 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 @@ -14,3 +14,10 @@ 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 @@ -5,5 +5,7 @@ obj-$(CONFIG_SND_BCM2835_SOC_I2S) += snd
  33
  34  # BCM2708 Machine Support
  35  snd-soc-hifiberry-dac-objs := hifiberry_dac.o
  36 +snd-soc-rpi-dac-objs := rpi-dac.o
  37
  38  obj-$(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 +1,118 @@
  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 +       .dai_link     = snd_rpi_rpi_dac_dai,
 106 +       .num_links    = ARRAY_SIZE(snd_rpi_rpi_dac_dai),
 107 +};
 108 +
 109 +static int snd_rpi_rpi_dac_probe(struct platform_device *pdev)
 110 +{
 111 +       int ret = 0;
 112 +
 113 +       snd_rpi_rpi_dac.dev = &pdev->dev;
 114 +
 115 +       if (pdev->dev.of_node) {
 116 +               struct device_node *i2s_node;
 117 +               struct snd_soc_dai_link *dai = &snd_rpi_rpi_dac_dai[0];
 118 +               i2s_node = of_parse_phandle(pdev->dev.of_node, "i2s-controller", 0);
 119 +
 120 +               if (i2s_node) {
 121 +                       dai->cpu_dai_name = NULL;
 122 +                       dai->cpu_of_node = i2s_node;
 123 +                       dai->platform_name = NULL;
 124 +                       dai->platform_of_node = i2s_node;
 125 +               }
 126 +       }
 127 +
 128 +       ret = snd_soc_register_card(&snd_rpi_rpi_dac);
 129 +       if (ret)
 130 +               dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n", ret);
 131 +
 132 +       return ret;
 133 +}
 134 +
 135 +static int snd_rpi_rpi_dac_remove(struct platform_device *pdev)
 136 +{
 137 +       return snd_soc_unregister_card(&snd_rpi_rpi_dac);
 138 +}
 139 +
 140 +static const struct of_device_id snd_rpi_rpi_dac_of_match[] = {
 141 +       { .compatible = "rpi,rpi-dac", },
 142 +       {},
 143 +};
 144 +MODULE_DEVICE_TABLE(of, snd_rpi_rpi_dac_of_match);
 145 +
 146 +static struct platform_driver snd_rpi_rpi_dac_driver = {
 147 +        .driver = {
 148 +                .name   = "snd-rpi-dac",
 149 +                .owner  = THIS_MODULE,
 150 +                .of_match_table = snd_rpi_rpi_dac_of_match,
 151 +        },
 152 +        .probe          = snd_rpi_rpi_dac_probe,
 153 +        .remove         = snd_rpi_rpi_dac_remove,
 154 +};
 155 +
 156 +module_platform_driver(snd_rpi_rpi_dac_driver);
 157 +
 158 +MODULE_AUTHOR("Florian Meier <florian.meier@koalo.de>");
 159 +MODULE_DESCRIPTION("ASoC Driver for RPi-DAC");
 160 +MODULE_LICENSE("GPL v2");
 161 --- a/sound/soc/codecs/Kconfig
 162 +++ b/sound/soc/codecs/Kconfig
 163 @@ -90,6 +90,7 @@ config SND_SOC_ALL_CODECS
 164         select SND_SOC_RT286 if I2C
 165         select SND_SOC_RT298 if I2C
 166         select SND_SOC_PCM5102A if I2C
 167 +       select SND_SOC_PCM1794A if I2C
 168         select SND_SOC_RT5631 if I2C
 169         select SND_SOC_RT5640 if I2C
 170         select SND_SOC_RT5645 if I2C
 171 @@ -550,6 +551,14 @@ config SND_SOC_RT298
 172         tristate
 173         depends on I2C
 174
 175 +config SND_SOC_RT298
 176 +       tristate
 177 +       depends on I2C
 178 +
 179 +config SND_SOC_PCM1794A
 180 +       tristate
 181 +       depends on I2C
 182 +
 183  config SND_SOC_PCM5102A
 184         tristate
 185         depends on I2C
 186 --- a/sound/soc/codecs/Makefile
 187 +++ b/sound/soc/codecs/Makefile
 188 @@ -85,6 +85,7 @@ snd-soc-rl6231-objs := rl6231.o
 189  snd-soc-rl6347a-objs := rl6347a.o
 190  snd-soc-rt286-objs := rt286.o
 191  snd-soc-rt298-objs := rt298.o
 192 +snd-soc-pcm1794a-objs := pcm1794a.o
 193  snd-soc-pcm5102a-objs := pcm5102a.o
 194  snd-soc-rt5631-objs := rt5631.o
 195  snd-soc-rt5640-objs := rt5640.o
 196 @@ -281,6 +282,7 @@ obj-$(CONFIG_SND_SOC_RL6231)        += snd-soc-
 197  obj-$(CONFIG_SND_SOC_RL6347A)  += snd-soc-rl6347a.o
 198  obj-$(CONFIG_SND_SOC_RT286)    += snd-soc-rt286.o
 199  obj-$(CONFIG_SND_SOC_RT298)    += snd-soc-rt298.o
 200 +obj-$(CONFIG_SND_SOC_PCM1794A) += snd-soc-pcm1794a.o
 201  obj-$(CONFIG_SND_SOC_PCM5102A) += snd-soc-pcm5102a.o
 202  obj-$(CONFIG_SND_SOC_RT5631)   += snd-soc-rt5631.o
 203  obj-$(CONFIG_SND_SOC_RT5640)   += snd-soc-rt5640.o
 204 --- /dev/null
 205 +++ b/sound/soc/codecs/pcm1794a.c
 206 @@ -0,0 +1,69 @@
 207 +/*
 208 + * Driver for the PCM1794A codec
 209 + *
 210 + * Author:     Florian Meier <florian.meier@koalo.de>
 211 + *             Copyright 2013
 212 + *
 213 + * This program is free software; you can redistribute it and/or
 214 + * modify it under the terms of the GNU General Public License
 215 + * version 2 as published by the Free Software Foundation.
 216 + *
 217 + * This program is distributed in the hope that it will be useful, but
 218 + * WITHOUT ANY WARRANTY; without even the implied warranty of
 219 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 220 + * General Public License for more details.
 221 + */
 222 +
 223 +
 224 +#include <linux/init.h>
 225 +#include <linux/module.h>
 226 +#include <linux/platform_device.h>
 227 +
 228 +#include <sound/soc.h>
 229 +
 230 +static struct snd_soc_dai_driver pcm1794a_dai = {
 231 +       .name = "pcm1794a-hifi",
 232 +       .playback = {
 233 +               .channels_min = 2,
 234 +               .channels_max = 2,
 235 +               .rates = SNDRV_PCM_RATE_8000_192000,
 236 +               .formats = SNDRV_PCM_FMTBIT_S16_LE |
 237 +                          SNDRV_PCM_FMTBIT_S24_LE
 238 +       },
 239 +};
 240 +
 241 +static struct snd_soc_codec_driver soc_codec_dev_pcm1794a;
 242 +
 243 +static int pcm1794a_probe(struct platform_device *pdev)
 244 +{
 245 +       return snd_soc_register_codec(&pdev->dev, &soc_codec_dev_pcm1794a,
 246 +                       &pcm1794a_dai, 1);
 247 +}
 248 +
 249 +static int pcm1794a_remove(struct platform_device *pdev)
 250 +{
 251 +       snd_soc_unregister_codec(&pdev->dev);
 252 +       return 0;
 253 +}
 254 +
 255 +static const struct of_device_id pcm1794a_of_match[] = {
 256 +       { .compatible = "ti,pcm1794a", },
 257 +       { }
 258 +};
 259 +MODULE_DEVICE_TABLE(of, pcm1794a_of_match);
 260 +
 261 +static struct platform_driver pcm1794a_codec_driver = {
 262 +       .probe          = pcm1794a_probe,
 263 +       .remove         = pcm1794a_remove,
 264 +       .driver         = {
 265 +               .name   = "pcm1794a-codec",
 266 +               .owner  = THIS_MODULE,
 267 +               .of_match_table = of_match_ptr(pcm1794a_of_match),
 268 +       },
 269 +};
 270 +
 271 +module_platform_driver(pcm1794a_codec_driver);
 272 +
 273 +MODULE_DESCRIPTION("ASoC PCM1794A codec driver");
 274 +MODULE_AUTHOR("Florian Meier <florian.meier@koalo.de>");
 275 +MODULE_LICENSE("GPL v2");