target/linux/brcm2708/patches-4.1/0039-ASoC-BCM2708-Add-support-for-RPi-DAC.patch

   1 From c5a634c60f6706ba7ffaec669d6ddae793a7b889 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 039/121] 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/mach-bcm2708/bcm2708.c | 19 ++++++++
  11  sound/soc/bcm/Kconfig           |  7 +++
  12  sound/soc/bcm/Makefile          |  2 +
  13  sound/soc/bcm/rpi-dac.c         | 97 +++++++++++++++++++++++++++++++++++++++++
  14  sound/soc/codecs/Kconfig        |  4 ++
  15  sound/soc/codecs/Makefile       |  2 +
  16  sound/soc/codecs/pcm1794a.c     | 62 ++++++++++++++++++++++++++
  17  7 files changed, 193 insertions(+)
  18  create mode 100644 sound/soc/bcm/rpi-dac.c
  19  create mode 100644 sound/soc/codecs/pcm1794a.c
  20
  21 --- a/arch/arm/mach-bcm2708/bcm2708.c
  22 +++ b/arch/arm/mach-bcm2708/bcm2708.c
  23 @@ -652,6 +652,20 @@ static struct platform_device snd_pcm510
  24  };
  25  #endif
  26
  27 +#if defined(CONFIG_SND_BCM2708_SOC_RPI_DAC) || defined(CONFIG_SND_BCM2708_SOC_RPI_DAC_MODULE)
  28 +static struct platform_device snd_rpi_dac_device = {
  29 +        .name = "snd-rpi-dac",
  30 +        .id = 0,
  31 +        .num_resources = 0,
  32 +};
  33 +
  34 +static struct platform_device snd_pcm1794a_codec_device = {
  35 +        .name = "pcm1794a-codec",
  36 +        .id = -1,
  37 +        .num_resources = 0,
  38 +};
  39 +#endif
  40 +
  41  int __init bcm_register_device(struct platform_device *pdev)
  42  {
  43         int ret;
  44 @@ -825,6 +839,11 @@ void __init bcm2708_init(void)
  45          bcm_register_device_dt(&snd_pcm5102a_codec_device);
  46  #endif
  47
  48 +#if defined(CONFIG_SND_BCM2708_SOC_RPI_DAC) || defined(CONFIG_SND_BCM2708_SOC_RPI_DAC_MODULE)
  49 +        bcm_register_device_dt(&snd_rpi_dac_device);
  50 +        bcm_register_device_dt(&snd_pcm1794a_codec_device);
  51 +#endif
  52 +
  53         if (!use_dt) {
  54                 for (i = 0; i < ARRAY_SIZE(amba_devs); i++) {
  55                         struct amba_device *d = amba_devs[i];
  56 --- a/sound/soc/bcm/Kconfig
  57 +++ b/sound/soc/bcm/Kconfig
  58 @@ -25,3 +25,10 @@ config SND_BCM2708_SOC_HIFIBERRY_DAC
  59          select SND_SOC_PCM5102A
  60          help
  61           Say Y or M if you want to add support for HifiBerry DAC.
  62 +
  63 +config SND_BCM2708_SOC_RPI_DAC
  64 +        tristate "Support for RPi-DAC"
  65 +        depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
  66 +        select SND_SOC_PCM1794A
  67 +        help
  68 +         Say Y or M if you want to add support for RPi-DAC.
  69 --- a/sound/soc/bcm/Makefile
  70 +++ b/sound/soc/bcm/Makefile
  71 @@ -10,5 +10,7 @@ obj-$(CONFIG_SND_BCM2708_SOC_I2S) += snd
  72
  73  # BCM2708 Machine Support
  74  snd-soc-hifiberry-dac-objs := hifiberry_dac.o
  75 +snd-soc-rpi-dac-objs := rpi-dac.o
  76
  77  obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DAC) += snd-soc-hifiberry-dac.o
  78 +obj-$(CONFIG_SND_BCM2708_SOC_RPI_DAC) += snd-soc-rpi-dac.o
  79 --- /dev/null
  80 +++ b/sound/soc/bcm/rpi-dac.c
  81 @@ -0,0 +1,97 @@
  82 +/*
  83 + * ASoC Driver for RPi-DAC.
  84 + *
  85 + * Author:     Florian Meier <florian.meier@koalo.de>
  86 + *             Copyright 2013
  87 + *
  88 + * This program is free software; you can redistribute it and/or
  89 + * modify it under the terms of the GNU General Public License
  90 + * version 2 as published by the Free Software Foundation.
  91 + *
  92 + * This program is distributed in the hope that it will be useful, but
  93 + * WITHOUT ANY WARRANTY; without even the implied warranty of
  94 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  95 + * General Public License for more details.
  96 + */
  97 +
  98 +#include <linux/module.h>
  99 +#include <linux/platform_device.h>
 100 +
 101 +#include <sound/core.h>
 102 +#include <sound/pcm.h>
 103 +#include <sound/pcm_params.h>
 104 +#include <sound/soc.h>
 105 +#include <sound/jack.h>
 106 +
 107 +static int snd_rpi_rpi_dac_init(struct snd_soc_pcm_runtime *rtd)
 108 +{
 109 +       return 0;
 110 +}
 111 +
 112 +static int snd_rpi_rpi_dac_hw_params(struct snd_pcm_substream *substream,
 113 +                                      struct snd_pcm_hw_params *params)
 114 +{
 115 +       struct snd_soc_pcm_runtime *rtd = substream->private_data;
 116 +       struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 117 +
 118 +       return snd_soc_dai_set_bclk_ratio(cpu_dai, 32*2);
 119 +}
 120 +
 121 +/* machine stream operations */
 122 +static struct snd_soc_ops snd_rpi_rpi_dac_ops = {
 123 +       .hw_params = snd_rpi_rpi_dac_hw_params,
 124 +};
 125 +
 126 +static struct snd_soc_dai_link snd_rpi_rpi_dac_dai[] = {
 127 +{
 128 +       .name           = "RPi-DAC",
 129 +       .stream_name    = "RPi-DAC HiFi",
 130 +       .cpu_dai_name   = "bcm2708-i2s.0",
 131 +       .codec_dai_name = "pcm1794a-hifi",
 132 +       .platform_name  = "bcm2708-i2s.0",
 133 +       .codec_name     = "pcm1794a-codec",
 134 +       .dai_fmt        = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 135 +                               SND_SOC_DAIFMT_CBS_CFS,
 136 +       .ops            = &snd_rpi_rpi_dac_ops,
 137 +       .init           = snd_rpi_rpi_dac_init,
 138 +},
 139 +};
 140 +
 141 +/* audio machine driver */
 142 +static struct snd_soc_card snd_rpi_rpi_dac = {
 143 +       .name         = "snd_rpi_rpi_dac",
 144 +       .dai_link     = snd_rpi_rpi_dac_dai,
 145 +       .num_links    = ARRAY_SIZE(snd_rpi_rpi_dac_dai),
 146 +};
 147 +
 148 +static int snd_rpi_rpi_dac_probe(struct platform_device *pdev)
 149 +{
 150 +       int ret = 0;
 151 +
 152 +       snd_rpi_rpi_dac.dev = &pdev->dev;
 153 +       ret = snd_soc_register_card(&snd_rpi_rpi_dac);
 154 +       if (ret)
 155 +               dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n", ret);
 156 +
 157 +       return ret;
 158 +}
 159 +
 160 +static int snd_rpi_rpi_dac_remove(struct platform_device *pdev)
 161 +{
 162 +       return snd_soc_unregister_card(&snd_rpi_rpi_dac);
 163 +}
 164 +
 165 +static struct platform_driver snd_rpi_rpi_dac_driver = {
 166 +        .driver = {
 167 +                .name   = "snd-rpi-dac",
 168 +                .owner  = THIS_MODULE,
 169 +        },
 170 +        .probe          = snd_rpi_rpi_dac_probe,
 171 +        .remove         = snd_rpi_rpi_dac_remove,
 172 +};
 173 +
 174 +module_platform_driver(snd_rpi_rpi_dac_driver);
 175 +
 176 +MODULE_AUTHOR("Florian Meier <florian.meier@koalo.de>");
 177 +MODULE_DESCRIPTION("ASoC Driver for RPi-DAC");
 178 +MODULE_LICENSE("GPL v2");
 179 --- a/sound/soc/codecs/Kconfig
 180 +++ b/sound/soc/codecs/Kconfig
 181 @@ -84,6 +84,7 @@ config SND_SOC_ALL_CODECS
 182         select SND_SOC_PCM512x_SPI if SPI_MASTER
 183         select SND_SOC_RT286 if I2C
 184         select SND_SOC_PCM5102A if I2C
 185 +       select SND_SOC_PCM1794A if I2C
 186         select SND_SOC_RT5631 if I2C
 187         select SND_SOC_RT5640 if I2C
 188         select SND_SOC_RT5645 if I2C
 189 @@ -512,6 +513,9 @@ config SND_SOC_RT286
 190         tristate
 191         depends on I2C
 192
 193 +config SND_SOC_PCM1794A
 194 +       tristate
 195 +
 196  config SND_SOC_PCM5102A
 197         tristate
 198
 199 --- a/sound/soc/codecs/Makefile
 200 +++ b/sound/soc/codecs/Makefile
 201 @@ -78,6 +78,7 @@ snd-soc-pcm512x-i2c-objs := pcm512x-i2c.
 202  snd-soc-pcm512x-spi-objs := pcm512x-spi.o
 203  snd-soc-rl6231-objs := rl6231.o
 204  snd-soc-rt286-objs := rt286.o
 205 +snd-soc-pcm1794a-objs := pcm1794a.o
 206  snd-soc-pcm5102a-objs := pcm5102a.o
 207  snd-soc-rt5631-objs := rt5631.o
 208  snd-soc-rt5640-objs := rt5640.o
 209 @@ -264,6 +265,7 @@ obj-$(CONFIG_SND_SOC_PCM512x_I2C)   += snd
 210  obj-$(CONFIG_SND_SOC_PCM512x_SPI)      += snd-soc-pcm512x-spi.o
 211  obj-$(CONFIG_SND_SOC_RL6231)   += snd-soc-rl6231.o
 212  obj-$(CONFIG_SND_SOC_RT286)    += snd-soc-rt286.o
 213 +obj-$(CONFIG_SND_SOC_PCM1794A) += snd-soc-pcm1794a.o
 214  obj-$(CONFIG_SND_SOC_PCM5102A) += snd-soc-pcm5102a.o
 215  obj-$(CONFIG_SND_SOC_RT5631)   += snd-soc-rt5631.o
 216  obj-$(CONFIG_SND_SOC_RT5640)   += snd-soc-rt5640.o
 217 --- /dev/null
 218 +++ b/sound/soc/codecs/pcm1794a.c
 219 @@ -0,0 +1,62 @@
 220 +/*
 221 + * Driver for the PCM1794A codec
 222 + *
 223 + * Author:     Florian Meier <florian.meier@koalo.de>
 224 + *             Copyright 2013
 225 + *
 226 + * This program is free software; you can redistribute it and/or
 227 + * modify it under the terms of the GNU General Public License
 228 + * version 2 as published by the Free Software Foundation.
 229 + *
 230 + * This program is distributed in the hope that it will be useful, but
 231 + * WITHOUT ANY WARRANTY; without even the implied warranty of
 232 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 233 + * General Public License for more details.
 234 + */
 235 +
 236 +
 237 +#include <linux/init.h>
 238 +#include <linux/module.h>
 239 +#include <linux/platform_device.h>
 240 +
 241 +#include <sound/soc.h>
 242 +
 243 +static struct snd_soc_dai_driver pcm1794a_dai = {
 244 +       .name = "pcm1794a-hifi",
 245 +       .playback = {
 246 +               .channels_min = 2,
 247 +               .channels_max = 2,
 248 +               .rates = SNDRV_PCM_RATE_8000_192000,
 249 +               .formats = SNDRV_PCM_FMTBIT_S16_LE |
 250 +                          SNDRV_PCM_FMTBIT_S24_LE
 251 +       },
 252 +};
 253 +
 254 +static struct snd_soc_codec_driver soc_codec_dev_pcm1794a;
 255 +
 256 +static int pcm1794a_probe(struct platform_device *pdev)
 257 +{
 258 +       return snd_soc_register_codec(&pdev->dev, &soc_codec_dev_pcm1794a,
 259 +                       &pcm1794a_dai, 1);
 260 +}
 261 +
 262 +static int pcm1794a_remove(struct platform_device *pdev)
 263 +{
 264 +       snd_soc_unregister_codec(&pdev->dev);
 265 +       return 0;
 266 +}
 267 +
 268 +static struct platform_driver pcm1794a_codec_driver = {
 269 +       .probe          = pcm1794a_probe,
 270 +       .remove         = pcm1794a_remove,
 271 +       .driver         = {
 272 +               .name   = "pcm1794a-codec",
 273 +               .owner  = THIS_MODULE,
 274 +       },
 275 +};
 276 +
 277 +module_platform_driver(pcm1794a_codec_driver);
 278 +
 279 +MODULE_DESCRIPTION("ASoC PCM1794A codec driver");
 280 +MODULE_AUTHOR("Florian Meier <florian.meier@koalo.de>");
 281 +MODULE_LICENSE("GPL v2");