target/linux/brcm2708/patches-3.18/0036-ASoC-BCM2708-Add-support-for-RPi-DAC.patch

   1 From 52fceff596533a847231d1f9b8ea13d4e6ee829b Mon Sep 17 00:00:00 2001
   2 From: Florian Meier <florian.meier@koalo.de>
   3 Date: Fri, 6 Dec 2013 20:50:28 +0100
   4 Subject: [PATCH 036/114] ASoC: BCM2708: Add support for RPi-DAC
   5
   6 This adds a machine driver for the RPi-DAC.
   7
   8 Signed-off-by: Florian Meier <florian.meier@koalo.de>
   9 ---
  10  arch/arm/configs/bcmrpi_defconfig |  1 +
  11  arch/arm/mach-bcm2708/bcm2708.c   | 19 ++++++++
  12  sound/soc/bcm/Kconfig             |  7 +++
  13  sound/soc/bcm/Makefile            |  2 +
  14  sound/soc/bcm/rpi-dac.c           | 97 +++++++++++++++++++++++++++++++++++++++
  15  sound/soc/codecs/Kconfig          |  4 ++
  16  sound/soc/codecs/Makefile         |  2 +
  17  sound/soc/codecs/pcm1794a.c       | 62 +++++++++++++++++++++++++
  18  8 files changed, 194 insertions(+)
  19  create mode 100644 sound/soc/bcm/rpi-dac.c
  20  create mode 100644 sound/soc/codecs/pcm1794a.c
  21
  22 diff --git a/arch/arm/configs/bcmrpi_defconfig b/arch/arm/configs/bcmrpi_defconfig
  23 index dfd98df..f688da5 100644
  24 --- a/arch/arm/configs/bcmrpi_defconfig
  25 +++ b/arch/arm/configs/bcmrpi_defconfig
  26 @@ -756,6 +756,7 @@ CONFIG_SND_USB_6FIRE=m
  27  CONFIG_SND_SOC=m
  28  CONFIG_SND_BCM2708_SOC_I2S=m
  29  CONFIG_SND_BCM2708_SOC_HIFIBERRY_DAC=m
  30 +CONFIG_SND_BCM2708_SOC_RPI_DAC=m
  31  CONFIG_SND_SIMPLE_CARD=m
  32  CONFIG_SOUND_PRIME=m
  33  CONFIG_HIDRAW=y
  34 diff --git a/arch/arm/mach-bcm2708/bcm2708.c b/arch/arm/mach-bcm2708/bcm2708.c
  35 index 50d4991..100c223 100644
  36 --- a/arch/arm/mach-bcm2708/bcm2708.c
  37 +++ b/arch/arm/mach-bcm2708/bcm2708.c
  38 @@ -623,6 +623,20 @@ static struct platform_device snd_pcm5102a_codec_device = {
  39  };
  40  #endif
  41
  42 +#if defined(CONFIG_SND_BCM2708_SOC_RPI_DAC) || defined(CONFIG_SND_BCM2708_SOC_RPI_DAC_MODULE)
  43 +static struct platform_device snd_rpi_dac_device = {
  44 +        .name = "snd-rpi-dac",
  45 +        .id = 0,
  46 +        .num_resources = 0,
  47 +};
  48 +
  49 +static struct platform_device snd_pcm1794a_codec_device = {
  50 +        .name = "pcm1794a-codec",
  51 +        .id = -1,
  52 +        .num_resources = 0,
  53 +};
  54 +#endif
  55 +
  56  int __init bcm_register_device(struct platform_device *pdev)
  57  {
  58         int ret;
  59 @@ -752,6 +766,11 @@ void __init bcm2708_init(void)
  60          bcm_register_device(&snd_pcm5102a_codec_device);
  61  #endif
  62
  63 +#if defined(CONFIG_SND_BCM2708_SOC_RPI_DAC) || defined(CONFIG_SND_BCM2708_SOC_RPI_DAC_MODULE)
  64 +        bcm_register_device(&snd_rpi_dac_device);
  65 +        bcm_register_device(&snd_pcm1794a_codec_device);
  66 +#endif
  67 +
  68         for (i = 0; i < ARRAY_SIZE(amba_devs); i++) {
  69                 struct amba_device *d = amba_devs[i];
  70                 amba_device_register(d, &iomem_resource);
  71 diff --git a/sound/soc/bcm/Kconfig b/sound/soc/bcm/Kconfig
  72 index b36a62f..714841d 100644
  73 --- a/sound/soc/bcm/Kconfig
  74 +++ b/sound/soc/bcm/Kconfig
  75 @@ -25,3 +25,10 @@ config SND_BCM2708_SOC_HIFIBERRY_DAC
  76          select SND_SOC_PCM5102A
  77          help
  78           Say Y or M if you want to add support for HifiBerry DAC.
  79 +
  80 +config SND_BCM2708_SOC_RPI_DAC
  81 +        tristate "Support for RPi-DAC"
  82 +        depends on SND_BCM2708_SOC_I2S
  83 +        select SND_SOC_PCM1794A
  84 +        help
  85 +         Say Y or M if you want to add support for RPi-DAC.
  86 diff --git a/sound/soc/bcm/Makefile b/sound/soc/bcm/Makefile
  87 index be90a49cb..ccc9809 100644
  88 --- a/sound/soc/bcm/Makefile
  89 +++ b/sound/soc/bcm/Makefile
  90 @@ -10,5 +10,7 @@ obj-$(CONFIG_SND_BCM2708_SOC_I2S) += snd-soc-bcm2708-i2s.o
  91
  92  # BCM2708 Machine Support
  93  snd-soc-hifiberry-dac-objs := hifiberry_dac.o
  94 +snd-soc-rpi-dac-objs := rpi-dac.o
  95
  96  obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DAC) += snd-soc-hifiberry-dac.o
  97 +obj-$(CONFIG_SND_BCM2708_SOC_RPI_DAC) += snd-soc-rpi-dac.o
  98 diff --git a/sound/soc/bcm/rpi-dac.c b/sound/soc/bcm/rpi-dac.c
  99 new file mode 100644
 100 index 0000000..6d6e0ba
 101 --- /dev/null
 102 +++ b/sound/soc/bcm/rpi-dac.c
 103 @@ -0,0 +1,97 @@
 104 +/*
 105 + * ASoC Driver for RPi-DAC.
 106 + *
 107 + * Author:     Florian Meier <florian.meier@koalo.de>
 108 + *             Copyright 2013
 109 + *
 110 + * This program is free software; you can redistribute it and/or
 111 + * modify it under the terms of the GNU General Public License
 112 + * version 2 as published by the Free Software Foundation.
 113 + *
 114 + * This program is distributed in the hope that it will be useful, but
 115 + * WITHOUT ANY WARRANTY; without even the implied warranty of
 116 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 117 + * General Public License for more details.
 118 + */
 119 +
 120 +#include <linux/module.h>
 121 +#include <linux/platform_device.h>
 122 +
 123 +#include <sound/core.h>
 124 +#include <sound/pcm.h>
 125 +#include <sound/pcm_params.h>
 126 +#include <sound/soc.h>
 127 +#include <sound/jack.h>
 128 +
 129 +static int snd_rpi_rpi_dac_init(struct snd_soc_pcm_runtime *rtd)
 130 +{
 131 +       return 0;
 132 +}
 133 +
 134 +static int snd_rpi_rpi_dac_hw_params(struct snd_pcm_substream *substream,
 135 +                                      struct snd_pcm_hw_params *params)
 136 +{
 137 +       struct snd_soc_pcm_runtime *rtd = substream->private_data;
 138 +       struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 139 +
 140 +       return snd_soc_dai_set_bclk_ratio(cpu_dai, 32*2);
 141 +}
 142 +
 143 +/* machine stream operations */
 144 +static struct snd_soc_ops snd_rpi_rpi_dac_ops = {
 145 +       .hw_params = snd_rpi_rpi_dac_hw_params,
 146 +};
 147 +
 148 +static struct snd_soc_dai_link snd_rpi_rpi_dac_dai[] = {
 149 +{
 150 +       .name           = "RPi-DAC",
 151 +       .stream_name    = "RPi-DAC HiFi",
 152 +       .cpu_dai_name   = "bcm2708-i2s.0",
 153 +       .codec_dai_name = "pcm1794a-hifi",
 154 +       .platform_name  = "bcm2708-i2s.0",
 155 +       .codec_name     = "pcm1794a-codec",
 156 +       .dai_fmt        = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 157 +                               SND_SOC_DAIFMT_CBS_CFS,
 158 +       .ops            = &snd_rpi_rpi_dac_ops,
 159 +       .init           = snd_rpi_rpi_dac_init,
 160 +},
 161 +};
 162 +
 163 +/* audio machine driver */
 164 +static struct snd_soc_card snd_rpi_rpi_dac = {
 165 +       .name         = "snd_rpi_rpi_dac",
 166 +       .dai_link     = snd_rpi_rpi_dac_dai,
 167 +       .num_links    = ARRAY_SIZE(snd_rpi_rpi_dac_dai),
 168 +};
 169 +
 170 +static int snd_rpi_rpi_dac_probe(struct platform_device *pdev)
 171 +{
 172 +       int ret = 0;
 173 +
 174 +       snd_rpi_rpi_dac.dev = &pdev->dev;
 175 +       ret = snd_soc_register_card(&snd_rpi_rpi_dac);
 176 +       if (ret)
 177 +               dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n", ret);
 178 +
 179 +       return ret;
 180 +}
 181 +
 182 +static int snd_rpi_rpi_dac_remove(struct platform_device *pdev)
 183 +{
 184 +       return snd_soc_unregister_card(&snd_rpi_rpi_dac);
 185 +}
 186 +
 187 +static struct platform_driver snd_rpi_rpi_dac_driver = {
 188 +        .driver = {
 189 +                .name   = "snd-rpi-dac",
 190 +                .owner  = THIS_MODULE,
 191 +        },
 192 +        .probe          = snd_rpi_rpi_dac_probe,
 193 +        .remove         = snd_rpi_rpi_dac_remove,
 194 +};
 195 +
 196 +module_platform_driver(snd_rpi_rpi_dac_driver);
 197 +
 198 +MODULE_AUTHOR("Florian Meier <florian.meier@koalo.de>");
 199 +MODULE_DESCRIPTION("ASoC Driver for RPi-DAC");
 200 +MODULE_LICENSE("GPL v2");
 201 diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
 202 index 0ef8bb7..3c236a6 100644
 203 --- a/sound/soc/codecs/Kconfig
 204 +++ b/sound/soc/codecs/Kconfig
 205 @@ -81,6 +81,7 @@ config SND_SOC_ALL_CODECS
 206         select SND_SOC_PCM512x_SPI if SPI_MASTER
 207         select SND_SOC_RT286 if I2C
 208         select SND_SOC_PCM5102A if I2C
 209 +       select SND_SOC_PCM1794A if I2C
 210         select SND_SOC_RT5631 if I2C
 211         select SND_SOC_RT5640 if I2C
 212         select SND_SOC_RT5645 if I2C
 213 @@ -487,6 +488,9 @@ config SND_SOC_RT286
 214         tristate
 215         depends on I2C
 216
 217 +config SND_SOC_PCM1794A
 218 +       tristate
 219 +
 220  config SND_SOC_PCM5102A
 221         tristate
 222
 223 diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile
 224 index 7b606e6..2a7f823 100644
 225 --- a/sound/soc/codecs/Makefile
 226 +++ b/sound/soc/codecs/Makefile
 227 @@ -74,6 +74,7 @@ snd-soc-pcm512x-i2c-objs := pcm512x-i2c.o
 228  snd-soc-pcm512x-spi-objs := pcm512x-spi.o
 229  snd-soc-rl6231-objs := rl6231.o
 230  snd-soc-rt286-objs := rt286.o
 231 +snd-soc-pcm1794a-objs := pcm1794a.o
 232  snd-soc-pcm5102a-objs := pcm5102a.o
 233  snd-soc-rt5631-objs := rt5631.o
 234  snd-soc-rt5640-objs := rt5640.o
 235 @@ -251,6 +252,7 @@ obj-$(CONFIG_SND_SOC_PCM512x_I2C)   += snd-soc-pcm512x-i2c.o
 236  obj-$(CONFIG_SND_SOC_PCM512x_SPI)      += snd-soc-pcm512x-spi.o
 237  obj-$(CONFIG_SND_SOC_RL6231)   += snd-soc-rl6231.o
 238  obj-$(CONFIG_SND_SOC_RT286)    += snd-soc-rt286.o
 239 +obj-$(CONFIG_SND_SOC_PCM1794A) += snd-soc-pcm1794a.o
 240  obj-$(CONFIG_SND_SOC_PCM5102A) += snd-soc-pcm5102a.o
 241  obj-$(CONFIG_SND_SOC_RT5631)   += snd-soc-rt5631.o
 242  obj-$(CONFIG_SND_SOC_RT5640)   += snd-soc-rt5640.o
 243 diff --git a/sound/soc/codecs/pcm1794a.c b/sound/soc/codecs/pcm1794a.c
 244 new file mode 100644
 245 index 0000000..b4eaa44
 246 --- /dev/null
 247 +++ b/sound/soc/codecs/pcm1794a.c
 248 @@ -0,0 +1,62 @@
 249 +/*
 250 + * Driver for the PCM1794A codec
 251 + *
 252 + * Author:     Florian Meier <florian.meier@koalo.de>
 253 + *             Copyright 2013
 254 + *
 255 + * This program is free software; you can redistribute it and/or
 256 + * modify it under the terms of the GNU General Public License
 257 + * version 2 as published by the Free Software Foundation.
 258 + *
 259 + * This program is distributed in the hope that it will be useful, but
 260 + * WITHOUT ANY WARRANTY; without even the implied warranty of
 261 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 262 + * General Public License for more details.
 263 + */
 264 +
 265 +
 266 +#include <linux/init.h>
 267 +#include <linux/module.h>
 268 +#include <linux/platform_device.h>
 269 +
 270 +#include <sound/soc.h>
 271 +
 272 +static struct snd_soc_dai_driver pcm1794a_dai = {
 273 +       .name = "pcm1794a-hifi",
 274 +       .playback = {
 275 +               .channels_min = 2,
 276 +               .channels_max = 2,
 277 +               .rates = SNDRV_PCM_RATE_8000_192000,
 278 +               .formats = SNDRV_PCM_FMTBIT_S16_LE |
 279 +                          SNDRV_PCM_FMTBIT_S24_LE
 280 +       },
 281 +};
 282 +
 283 +static struct snd_soc_codec_driver soc_codec_dev_pcm1794a;
 284 +
 285 +static int pcm1794a_probe(struct platform_device *pdev)
 286 +{
 287 +       return snd_soc_register_codec(&pdev->dev, &soc_codec_dev_pcm1794a,
 288 +                       &pcm1794a_dai, 1);
 289 +}
 290 +
 291 +static int pcm1794a_remove(struct platform_device *pdev)
 292 +{
 293 +       snd_soc_unregister_codec(&pdev->dev);
 294 +       return 0;
 295 +}
 296 +
 297 +static struct platform_driver pcm1794a_codec_driver = {
 298 +       .probe          = pcm1794a_probe,
 299 +       .remove         = pcm1794a_remove,
 300 +       .driver         = {
 301 +               .name   = "pcm1794a-codec",
 302 +               .owner  = THIS_MODULE,
 303 +       },
 304 +};
 305 +
 306 +module_platform_driver(pcm1794a_codec_driver);
 307 +
 308 +MODULE_DESCRIPTION("ASoC PCM1794A codec driver");
 309 +MODULE_AUTHOR("Florian Meier <florian.meier@koalo.de>");
 310 +MODULE_LICENSE("GPL v2");
 311 --
 312 1.8.3.2
 313