target/linux/brcm2708/patches-4.4/0070-Added-support-for-HiFiBerry-DAC.patch

   1 From bdc06975313393c21c0f72d52f1733a2333d1b70 Mon Sep 17 00:00:00 2001
   2 From: Daniel Matuschek <info@crazy-audio.com>
   3 Date: Mon, 4 Aug 2014 10:06:56 +0200
   4 Subject: [PATCH 070/304] Added support for HiFiBerry DAC+
   5
   6 The driver is based on the HiFiBerry DAC driver. However HiFiBerry DAC+ uses
   7 a different codec chip (PCM5122), therefore a new driver is necessary.
   8 ---
   9  sound/soc/bcm/Kconfig             |   7 ++
  10  sound/soc/bcm/Makefile            |   2 +
  11  sound/soc/bcm/hifiberry_dacplus.c | 141 ++++++++++++++++++++++++++++++++++++++
  12  3 files changed, 150 insertions(+)
  13  create mode 100644 sound/soc/bcm/hifiberry_dacplus.c
  14
  15 --- a/sound/soc/bcm/Kconfig
  16 +++ b/sound/soc/bcm/Kconfig
  17 @@ -15,6 +15,13 @@ config SND_BCM2708_SOC_HIFIBERRY_DAC
  18          help
  19           Say Y or M if you want to add support for HifiBerry DAC.
  20
  21 +config SND_BCM2708_SOC_HIFIBERRY_DACPLUS
  22 +        tristate "Support for HifiBerry DAC+"
  23 +        depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
  24 +        select SND_SOC_PCM512x
  25 +        help
  26 +         Say Y or M if you want to add support for HifiBerry DAC+.
  27 +
  28  config SND_BCM2708_SOC_HIFIBERRY_DIGI
  29          tristate "Support for HifiBerry Digi"
  30          depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
  31 --- a/sound/soc/bcm/Makefile
  32 +++ b/sound/soc/bcm/Makefile
  33 @@ -5,11 +5,13 @@ obj-$(CONFIG_SND_BCM2835_SOC_I2S) += snd
  34
  35  # BCM2708 Machine Support
  36  snd-soc-hifiberry-dac-objs := hifiberry_dac.o
  37 +snd-soc-hifiberry-dacplus-objs := hifiberry_dacplus.o
  38  snd-soc-hifiberry-digi-objs := hifiberry_digi.o
  39  snd-soc-rpi-dac-objs := rpi-dac.o
  40  snd-soc-iqaudio-dac-objs := iqaudio-dac.o
  41
  42  obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DAC) += snd-soc-hifiberry-dac.o
  43 +obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUS) += snd-soc-hifiberry-dacplus.o
  44  obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DIGI) += snd-soc-hifiberry-digi.o
  45  obj-$(CONFIG_SND_BCM2708_SOC_RPI_DAC) += snd-soc-rpi-dac.o
  46  obj-$(CONFIG_SND_BCM2708_SOC_IQAUDIO_DAC) += snd-soc-iqaudio-dac.o
  47 --- /dev/null
  48 +++ b/sound/soc/bcm/hifiberry_dacplus.c
  49 @@ -0,0 +1,141 @@
  50 +/*
  51 + * ASoC Driver for HiFiBerry DAC+
  52 + *
  53 + * Author:     Daniel Matuschek
  54 + *             Copyright 2014
  55 + *             based on code by Florian Meier <florian.meier@koalo.de>
  56 + *
  57 + * This program is free software; you can redistribute it and/or
  58 + * modify it under the terms of the GNU General Public License
  59 + * version 2 as published by the Free Software Foundation.
  60 + *
  61 + * This program is distributed in the hope that it will be useful, but
  62 + * WITHOUT ANY WARRANTY; without even the implied warranty of
  63 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  64 + * General Public License for more details.
  65 + */
  66 +
  67 +#include <linux/module.h>
  68 +#include <linux/platform_device.h>
  69 +
  70 +#include <sound/core.h>
  71 +#include <sound/pcm.h>
  72 +#include <sound/pcm_params.h>
  73 +#include <sound/soc.h>
  74 +#include <sound/jack.h>
  75 +
  76 +#include "../codecs/pcm512x.h"
  77 +
  78 +static int snd_rpi_hifiberry_dacplus_init(struct snd_soc_pcm_runtime *rtd)
  79 +{
  80 +       struct snd_soc_codec *codec = rtd->codec;
  81 +       snd_soc_update_bits(codec, PCM512x_GPIO_EN, 0x08, 0x08);
  82 +       snd_soc_update_bits(codec, PCM512x_GPIO_OUTPUT_4, 0xf, 0x02);
  83 +       snd_soc_update_bits(codec, PCM512x_GPIO_CONTROL_1, 0x08,0x08);
  84 +       return 0;
  85 +}
  86 +
  87 +static int snd_rpi_hifiberry_dacplus_hw_params(struct snd_pcm_substream *substream,
  88 +                                      struct snd_pcm_hw_params *params)
  89 +{
  90 +       struct snd_soc_pcm_runtime *rtd = substream->private_data;
  91 +       struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  92 +       return snd_soc_dai_set_bclk_ratio(cpu_dai, 64);
  93 +}
  94 +
  95 +static int snd_rpi_hifiberry_dacplus_startup(struct snd_pcm_substream *substream) {
  96 +       struct snd_soc_pcm_runtime *rtd = substream->private_data;
  97 +       struct snd_soc_codec *codec = rtd->codec;
  98 +       snd_soc_update_bits(codec, PCM512x_GPIO_CONTROL_1, 0x08,0x08);
  99 +       return 0;
 100 +}
 101 +
 102 +static void snd_rpi_hifiberry_dacplus_shutdown(struct snd_pcm_substream *substream) {
 103 +       struct snd_soc_pcm_runtime *rtd = substream->private_data;
 104 +       struct snd_soc_codec *codec = rtd->codec;
 105 +       snd_soc_update_bits(codec, PCM512x_GPIO_CONTROL_1, 0x08,0x00);
 106 +}
 107 +
 108 +/* machine stream operations */
 109 +static struct snd_soc_ops snd_rpi_hifiberry_dacplus_ops = {
 110 +       .hw_params = snd_rpi_hifiberry_dacplus_hw_params,
 111 +       .startup = snd_rpi_hifiberry_dacplus_startup,
 112 +       .shutdown = snd_rpi_hifiberry_dacplus_shutdown,
 113 +};
 114 +
 115 +static struct snd_soc_dai_link snd_rpi_hifiberry_dacplus_dai[] = {
 116 +{
 117 +       .name           = "HiFiBerry DAC+",
 118 +       .stream_name    = "HiFiBerry DAC+ HiFi",
 119 +       .cpu_dai_name   = "bcm2708-i2s.0",
 120 +       .codec_dai_name = "pcm512x-hifi",
 121 +       .platform_name  = "bcm2708-i2s.0",
 122 +       .codec_name     = "pcm512x.1-004d",
 123 +       .dai_fmt        = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 124 +                               SND_SOC_DAIFMT_CBS_CFS,
 125 +       .ops            = &snd_rpi_hifiberry_dacplus_ops,
 126 +       .init           = snd_rpi_hifiberry_dacplus_init,
 127 +},
 128 +};
 129 +
 130 +/* audio machine driver */
 131 +static struct snd_soc_card snd_rpi_hifiberry_dacplus = {
 132 +       .name         = "snd_rpi_hifiberry_dacplus",
 133 +       .dai_link     = snd_rpi_hifiberry_dacplus_dai,
 134 +       .num_links    = ARRAY_SIZE(snd_rpi_hifiberry_dacplus_dai),
 135 +};
 136 +
 137 +static int snd_rpi_hifiberry_dacplus_probe(struct platform_device *pdev)
 138 +{
 139 +       int ret = 0;
 140 +
 141 +       snd_rpi_hifiberry_dacplus.dev = &pdev->dev;
 142 +
 143 +       if (pdev->dev.of_node) {
 144 +           struct device_node *i2s_node;
 145 +           struct snd_soc_dai_link *dai = &snd_rpi_hifiberry_dacplus_dai[0];
 146 +           i2s_node = of_parse_phandle(pdev->dev.of_node,
 147 +                                       "i2s-controller", 0);
 148 +
 149 +           if (i2s_node) {
 150 +               dai->cpu_dai_name = NULL;
 151 +               dai->cpu_of_node = i2s_node;
 152 +               dai->platform_name = NULL;
 153 +               dai->platform_of_node = i2s_node;
 154 +           }
 155 +       }
 156 +
 157 +       ret = snd_soc_register_card(&snd_rpi_hifiberry_dacplus);
 158 +       if (ret)
 159 +               dev_err(&pdev->dev,
 160 +                       "snd_soc_register_card() failed: %d\n", ret);
 161 +
 162 +       return ret;
 163 +}
 164 +
 165 +static int snd_rpi_hifiberry_dacplus_remove(struct platform_device *pdev)
 166 +{
 167 +       return snd_soc_unregister_card(&snd_rpi_hifiberry_dacplus);
 168 +}
 169 +
 170 +static const struct of_device_id snd_rpi_hifiberry_dacplus_of_match[] = {
 171 +       { .compatible = "hifiberry,hifiberry-dacplus", },
 172 +       {},
 173 +};
 174 +MODULE_DEVICE_TABLE(of, snd_rpi_hifiberry_dacplus_of_match);
 175 +
 176 +static struct platform_driver snd_rpi_hifiberry_dacplus_driver = {
 177 +       .driver = {
 178 +               .name   = "snd-rpi-hifiberry-dacplus",
 179 +               .owner  = THIS_MODULE,
 180 +               .of_match_table = snd_rpi_hifiberry_dacplus_of_match,
 181 +       },
 182 +       .probe          = snd_rpi_hifiberry_dacplus_probe,
 183 +       .remove         = snd_rpi_hifiberry_dacplus_remove,
 184 +};
 185 +
 186 +module_platform_driver(snd_rpi_hifiberry_dacplus_driver);
 187 +
 188 +MODULE_AUTHOR("Daniel Matuschek <daniel@hifiberry.com>");
 189 +MODULE_DESCRIPTION("ASoC Driver for HiFiBerry DAC+");
 190 +MODULE_LICENSE("GPL v2");