target/linux/brcm2708/patches-3.18/0038-ASoC-BCM-Add-support-for-HiFiBerry-Digi.-Driver-is-b.patch

   1 From bccfebf3bc4457faddaa65e3492ec9f07cb5750b Mon Sep 17 00:00:00 2001
   2 From: Daniel Matuschek <info@crazy-audio.com>
   3 Date: Wed, 15 Jan 2014 21:42:08 +0100
   4 Subject: [PATCH 038/114] ASoC: BCM:Add support for HiFiBerry Digi. Driver is
   5  based on the patched WM8804 driver.
   6
   7 Signed-off-by: Daniel Matuschek <daniel@matuschek.net>
   8 ---
   9  sound/soc/bcm/Kconfig          |   7 ++
  10  sound/soc/bcm/Makefile         |   2 +
  11  sound/soc/bcm/hifiberry_digi.c | 153 +++++++++++++++++++++++++++++++++++++++++
  12  3 files changed, 162 insertions(+)
  13  create mode 100644 sound/soc/bcm/hifiberry_digi.c
  14
  15 --- a/sound/soc/bcm/Kconfig
  16 +++ b/sound/soc/bcm/Kconfig
  17 @@ -26,6 +26,13 @@ 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_DIGI
  22 +        tristate "Support for HifiBerry Digi"
  23 +        depends on SND_BCM2708_SOC_I2S
  24 +        select SND_SOC_WM8804
  25 +        help
  26 +         Say Y or M if you want to add support for HifiBerry Digi S/PDIF output board.
  27 +
  28  config SND_BCM2708_SOC_RPI_DAC
  29          tristate "Support for RPi-DAC"
  30          depends on SND_BCM2708_SOC_I2S
  31 --- a/sound/soc/bcm/Makefile
  32 +++ b/sound/soc/bcm/Makefile
  33 @@ -10,7 +10,9 @@ obj-$(CONFIG_SND_BCM2708_SOC_I2S) += snd
  34
  35  # BCM2708 Machine Support
  36  snd-soc-hifiberry-dac-objs := hifiberry_dac.o
  37 +snd-soc-hifiberry-digi-objs := hifiberry_digi.o
  38  snd-soc-rpi-dac-objs := rpi-dac.o
  39
  40  obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DAC) += snd-soc-hifiberry-dac.o
  41 +obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DIGI) += snd-soc-hifiberry-digi.o
  42  obj-$(CONFIG_SND_BCM2708_SOC_RPI_DAC) += snd-soc-rpi-dac.o
  43 --- /dev/null
  44 +++ b/sound/soc/bcm/hifiberry_digi.c
  45 @@ -0,0 +1,153 @@
  46 +/*
  47 + * ASoC Driver for HifiBerry Digi
  48 + *
  49 + * Author: Daniel Matuschek <info@crazy-audio.com>
  50 + * based on the HifiBerry DAC driver by Florian Meier <florian.meier@koalo.de>
  51 + *     Copyright 2013
  52 + *
  53 + * This program is free software; you can redistribute it and/or
  54 + * modify it under the terms of the GNU General Public License
  55 + * version 2 as published by the Free Software Foundation.
  56 + *
  57 + * This program is distributed in the hope that it will be useful, but
  58 + * WITHOUT ANY WARRANTY; without even the implied warranty of
  59 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  60 + * General Public License for more details.
  61 + */
  62 +
  63 +#include <linux/module.h>
  64 +#include <linux/platform_device.h>
  65 +
  66 +#include <sound/core.h>
  67 +#include <sound/pcm.h>
  68 +#include <sound/pcm_params.h>
  69 +#include <sound/soc.h>
  70 +#include <sound/jack.h>
  71 +
  72 +#include "../codecs/wm8804.h"
  73 +
  74 +static int samplerate=44100;
  75 +
  76 +static int snd_rpi_hifiberry_digi_init(struct snd_soc_pcm_runtime *rtd)
  77 +{
  78 +       struct snd_soc_codec *codec = rtd->codec;
  79 +
  80 +       /* enable TX output */
  81 +       snd_soc_update_bits(codec, WM8804_PWRDN, 0x4, 0x0);
  82 +
  83 +       return 0;
  84 +}
  85 +
  86 +static int snd_rpi_hifiberry_digi_hw_params(struct snd_pcm_substream *substream,
  87 +                                      struct snd_pcm_hw_params *params)
  88 +{
  89 +       struct snd_soc_pcm_runtime *rtd = substream->private_data;
  90 +       struct snd_soc_dai *codec_dai = rtd->codec_dai;
  91 +       struct snd_soc_codec *codec = rtd->codec;
  92 +       struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  93 +
  94 +       int sysclk = 27000000; /* This is fixed on this board */
  95 +
  96 +       long mclk_freq=0;
  97 +       int mclk_div=1;
  98 +
  99 +       int ret;
 100 +
 101 +       samplerate = params_rate(params);
 102 +
 103 +       switch (samplerate) {
 104 +               case 44100:
 105 +               case 48000:
 106 +               case 88200:
 107 +               case 96000:
 108 +                       mclk_freq=samplerate*256;
 109 +                       mclk_div=WM8804_MCLKDIV_256FS;
 110 +                       break;
 111 +               case 176400:
 112 +               case 192000:
 113 +                       mclk_freq=samplerate*128;
 114 +                       mclk_div=WM8804_MCLKDIV_128FS;
 115 +                       break;
 116 +               default:
 117 +                       dev_err(substream->pcm->dev,
 118 +                       "Failed to set WM8804 SYSCLK, unsupported samplerate\n");
 119 +       }
 120 +
 121 +       snd_soc_dai_set_clkdiv(codec_dai, WM8804_MCLK_DIV, mclk_div);
 122 +       snd_soc_dai_set_pll(codec_dai, 0, 0, sysclk, mclk_freq);
 123 +
 124 +       ret = snd_soc_dai_set_sysclk(codec_dai, WM8804_TX_CLKSRC_PLL,
 125 +                                       sysclk, SND_SOC_CLOCK_OUT);
 126 +       if (ret < 0) {
 127 +               dev_err(substream->pcm->dev,
 128 +               "Failed to set WM8804 SYSCLK: %d\n", ret);
 129 +               return ret;
 130 +       }
 131 +
 132 +       /* Enable TX output */
 133 +       snd_soc_update_bits(codec, WM8804_PWRDN, 0x4, 0x0);
 134 +
 135 +       /* Power on */
 136 +       snd_soc_update_bits(codec, WM8804_PWRDN, 0x9, 0);
 137 +
 138 +       return snd_soc_dai_set_bclk_ratio(cpu_dai,64);
 139 +}
 140 +
 141 +/* machine stream operations */
 142 +static struct snd_soc_ops snd_rpi_hifiberry_digi_ops = {
 143 +       .hw_params = snd_rpi_hifiberry_digi_hw_params,
 144 +};
 145 +
 146 +static struct snd_soc_dai_link snd_rpi_hifiberry_digi_dai[] = {
 147 +{
 148 +       .name           = "HifiBerry Digi",
 149 +       .stream_name    = "HifiBerry Digi HiFi",
 150 +       .cpu_dai_name   = "bcm2708-i2s.0",
 151 +       .codec_dai_name = "wm8804-spdif",
 152 +       .platform_name  = "bcm2708-i2s.0",
 153 +       .codec_name     = "wm8804.1-003b",
 154 +       .dai_fmt        = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 155 +                               SND_SOC_DAIFMT_CBM_CFM,
 156 +       .ops            = &snd_rpi_hifiberry_digi_ops,
 157 +       .init           = snd_rpi_hifiberry_digi_init,
 158 +},
 159 +};
 160 +
 161 +/* audio machine driver */
 162 +static struct snd_soc_card snd_rpi_hifiberry_digi = {
 163 +       .name         = "snd_rpi_hifiberry_digi",
 164 +       .dai_link     = snd_rpi_hifiberry_digi_dai,
 165 +       .num_links    = ARRAY_SIZE(snd_rpi_hifiberry_digi_dai),
 166 +};
 167 +
 168 +static int snd_rpi_hifiberry_digi_probe(struct platform_device *pdev)
 169 +{
 170 +       int ret = 0;
 171 +
 172 +       snd_rpi_hifiberry_digi.dev = &pdev->dev;
 173 +       ret = snd_soc_register_card(&snd_rpi_hifiberry_digi);
 174 +       if (ret)
 175 +               dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n", ret);
 176 +
 177 +       return ret;
 178 +}
 179 +
 180 +static int snd_rpi_hifiberry_digi_remove(struct platform_device *pdev)
 181 +{
 182 +       return snd_soc_unregister_card(&snd_rpi_hifiberry_digi);
 183 +}
 184 +
 185 +static struct platform_driver snd_rpi_hifiberry_digi_driver = {
 186 +       .driver = {
 187 +               .name   = "snd-hifiberry-digi",
 188 +               .owner  = THIS_MODULE,
 189 +       },
 190 +       .probe          = snd_rpi_hifiberry_digi_probe,
 191 +       .remove         = snd_rpi_hifiberry_digi_remove,
 192 +};
 193 +
 194 +module_platform_driver(snd_rpi_hifiberry_digi_driver);
 195 +
 196 +MODULE_AUTHOR("Daniel Matuschek <info@crazy-audio.com>");
 197 +MODULE_DESCRIPTION("ASoC Driver for HifiBerry Digi");
 198 +MODULE_LICENSE("GPL v2");