target/linux/brcm2708/patches-4.9/0078-ARM-adau1977-adc-Add-basic-machine-driver-for-adau19.patch

   1 From 9bbd8a3c8378eac9e605e0f37f4005583e122527 Mon Sep 17 00:00:00 2001
   2 From: Andrey Grodzovsky <andrey2805@gmail.com>
   3 Date: Tue, 3 May 2016 22:10:59 -0400
   4 Subject: [PATCH] ARM: adau1977-adc: Add basic machine driver for adau1977
   5  codec driver.
   6
   7 This commit adds basic support for the codec usage including: Device tree overlay,
   8 binding I2S bus and setting I2S mode, clock source and frequency setting according
   9 to spec.
  10
  11 Signed-off-by: Andrey Grodzovsky <andrey2805@gmail.com>
  12 ---
  13  sound/soc/bcm/Kconfig        |   7 +++
  14  sound/soc/bcm/Makefile       |   2 +
  15  sound/soc/bcm/adau1977-adc.c | 125 +++++++++++++++++++++++++++++++++++++++++++
  16  3 files changed, 134 insertions(+)
  17  create mode 100644 sound/soc/bcm/adau1977-adc.c
  18
  19 --- a/sound/soc/bcm/Kconfig
  20 +++ b/sound/soc/bcm/Kconfig
  21 @@ -87,3 +87,10 @@ config SND_BCM2708_SOC_RASPIDAC3
  22         select SND_SOC_TPA6130A2
  23         help
  24           Say Y or M if you want to add support for RaspiDAC Rev.3x.
  25 +
  26 +config SND_BCM2708_SOC_ADAU1977_ADC
  27 +       tristate "Support for ADAU1977 ADC"
  28 +       depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
  29 +       select SND_SOC_ADAU1977_I2C
  30 +       help
  31 +         Say Y or M if you want to add support for ADAU1977 ADC.
  32 --- a/sound/soc/bcm/Makefile
  33 +++ b/sound/soc/bcm/Makefile
  34 @@ -9,6 +9,7 @@ snd-soc-cygnus-objs := cygnus-pcm.o cygn
  35  obj-$(CONFIG_SND_SOC_CYGNUS) += snd-soc-cygnus.o
  36
  37  # BCM2708 Machine Support
  38 +snd-soc-adau1977-adc-objs := adau1977-adc.o
  39  snd-soc-hifiberry-amp-objs := hifiberry_amp.o
  40  snd-soc-hifiberry-dac-objs := hifiberry_dac.o
  41  snd-soc-hifiberry-dacplus-objs := hifiberry_dacplus.o
  42 @@ -20,6 +21,7 @@ snd-soc-rpi-proto-objs := rpi-proto.o
  43  snd-soc-iqaudio-dac-objs := iqaudio-dac.o
  44  snd-soc-raspidac3-objs := raspidac3.o
  45
  46 +obj-$(CONFIG_SND_BCM2708_SOC_ADAU1977_ADC) += snd-soc-adau1977-adc.o
  47  obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_AMP) += snd-soc-hifiberry-amp.o
  48  obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DAC) += snd-soc-hifiberry-dac.o
  49  obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUS) += snd-soc-hifiberry-dacplus.o
  50 --- /dev/null
  51 +++ b/sound/soc/bcm/adau1977-adc.c
  52 @@ -0,0 +1,125 @@
  53 +/*
  54 + * ASoC Driver for ADAU1977 ADC
  55 + *
  56 + * Author:     Andrey Grodzovsky <andrey2805@gmail.com>
  57 + *             Copyright 2016
  58 + *
  59 + * This file is based on hifibery_dac driver by Florian Meier.
  60 + *
  61 + * This program is free software; you can redistribute it and/or
  62 + * modify it under the terms of the GNU General Public License
  63 + * version 2 as published by the Free Software Foundation.
  64 + *
  65 + * This program is distributed in the hope that it will be useful, but
  66 + * WITHOUT ANY WARRANTY; without even the implied warranty of
  67 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  68 + * General Public License for more details.
  69 + */
  70 +
  71 +#include <linux/module.h>
  72 +#include <linux/platform_device.h>
  73 +
  74 +#include <sound/core.h>
  75 +#include <sound/pcm.h>
  76 +#include <sound/pcm_params.h>
  77 +#include <sound/soc.h>
  78 +#include <sound/jack.h>
  79 +
  80 +enum adau1977_clk_id {
  81 +    ADAU1977_SYSCLK,
  82 +};
  83 +
  84 +enum adau1977_sysclk_src {
  85 +    ADAU1977_SYSCLK_SRC_MCLK,
  86 +    ADAU1977_SYSCLK_SRC_LRCLK,
  87 +};
  88 +
  89 +static int eval_adau1977_init(struct snd_soc_pcm_runtime *rtd)
  90 +{
  91 +       int ret;
  92 +       struct snd_soc_dai *codec_dai = rtd->codec_dai;
  93 +
  94 +       ret = snd_soc_dai_set_tdm_slot(codec_dai, 0, 0, 0, 0);
  95 +       if (ret < 0)
  96 +               return ret;
  97 +
  98 +       return snd_soc_codec_set_sysclk(rtd->codec, ADAU1977_SYSCLK,
  99 +                       ADAU1977_SYSCLK_SRC_MCLK, 11289600, SND_SOC_CLOCK_IN);
 100 +}
 101 +
 102 +static struct snd_soc_dai_link snd_rpi_adau1977_dai[] = {
 103 +       {
 104 +       .name = "adau1977",
 105 +       .stream_name = "ADAU1977",
 106 +       .cpu_dai_name = "bcm2708-i2s.0",
 107 +       .codec_dai_name = "adau1977-hifi",
 108 +       .platform_name = "bcm2708-i2s.0",
 109 +       .codec_name = "adau1977.1-0011",
 110 +       .init = eval_adau1977_init,
 111 +       .dai_fmt = SND_SOC_DAIFMT_I2S |
 112 +               SND_SOC_DAIFMT_NB_NF |
 113 +               SND_SOC_DAIFMT_CBM_CFM,
 114 +       },
 115 +};
 116 +
 117 +/* audio machine driver */
 118 +static struct snd_soc_card snd_adau1977_adc = {
 119 +       .name         = "snd_rpi_adau1977_adc",
 120 +       .owner        = THIS_MODULE,
 121 +       .dai_link     = snd_rpi_adau1977_dai,
 122 +       .num_links    = ARRAY_SIZE(snd_rpi_adau1977_dai),
 123 +};
 124 +
 125 +static int snd_adau1977_adc_probe(struct platform_device *pdev)
 126 +{
 127 +       int ret = 0;
 128 +
 129 +       snd_adau1977_adc.dev = &pdev->dev;
 130 +       if (pdev->dev.of_node) {
 131 +           struct device_node *i2s_node;
 132 +           struct snd_soc_dai_link *dai = &snd_rpi_adau1977_dai[0];
 133 +           i2s_node = of_parse_phandle(pdev->dev.of_node,
 134 +                                       "i2s-controller", 0);
 135 +
 136 +           if (i2s_node) {
 137 +               dai->cpu_dai_name = NULL;
 138 +               dai->cpu_of_node = i2s_node;
 139 +               dai->platform_name = NULL;
 140 +               dai->platform_of_node = i2s_node;
 141 +           }
 142 +       }
 143 +
 144 +       ret = snd_soc_register_card(&snd_adau1977_adc);
 145 +       if (ret)
 146 +               dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n", ret);
 147 +
 148 +       return ret;
 149 +}
 150 +
 151 +static int snd_adau1977_adc_remove(struct platform_device *pdev)
 152 +{
 153 +       return snd_soc_unregister_card(&snd_adau1977_adc);
 154 +}
 155 +
 156 +static const struct of_device_id snd_adau1977_adc_of_match[] = {
 157 +       { .compatible = "adi,adau1977-adc", },
 158 +       {},
 159 +};
 160 +
 161 +MODULE_DEVICE_TABLE(of, snd_adau1977_adc_of_match);
 162 +
 163 +static struct platform_driver snd_adau1977_adc_driver = {
 164 +        .driver = {
 165 +                .name   = "snd-adau1977-adc",
 166 +                .owner  = THIS_MODULE,
 167 +               .of_match_table = snd_adau1977_adc_of_match,
 168 +        },
 169 +        .probe          = snd_adau1977_adc_probe,
 170 +        .remove         = snd_adau1977_adc_remove,
 171 +};
 172 +
 173 +module_platform_driver(snd_adau1977_adc_driver);
 174 +
 175 +MODULE_AUTHOR("Andrey Grodzovsky <andrey2805@gmail.com>");
 176 +MODULE_DESCRIPTION("ASoC Driver for ADAU1977 ADC");
 177 +MODULE_LICENSE("GPL v2");