target/linux/brcm2708/patches-3.10/0157-ASoC-BCM-Add-support-for-HiFiBerry-Digi.patch

   1 From 4800df016d86e646023966b727915a06f9c9ccd9 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 157/196] 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          |   9 ++-
  10  sound/soc/bcm/Makefile         |   2 +
  11  sound/soc/bcm/hifiberry_digi.c | 153 +++++++++++++++++++++++++++++++++++++++++
  12  3 files changed, 163 insertions(+), 1 deletion(-)
  13  create mode 100644 sound/soc/bcm/hifiberry_digi.c
  14
  15 diff --git a/sound/soc/bcm/Kconfig b/sound/soc/bcm/Kconfig
  16 index 1c1f5cf..7e2afc2 100644
  17 --- a/sound/soc/bcm/Kconfig
  18 +++ b/sound/soc/bcm/Kconfig
  19 @@ -16,9 +16,16 @@ config SND_BCM2708_SOC_HIFIBERRY_DAC
  20          help
  21           Say Y or M if you want to add support for HifiBerry DAC.
  22
  23 +config SND_BCM2708_SOC_HIFIBERRY_DIGI
  24 +        tristate "Support for HifiBerry Digi"
  25 +        depends on SND_BCM2708_SOC_I2S
  26 +        select SND_SOC_WM8804
  27 +        help
  28 +         Say Y or M if you want to add support for HifiBerry Digi S/PDIF output board.
  29 +
  30  config SND_BCM2708_SOC_RPI_DAC
  31          tristate "Support for RPi-DAC"
  32          depends on SND_BCM2708_SOC_I2S
  33          select SND_SOC_PCM1794A
  34          help
  35 -         Say Y or M if you want to add support for RPi-DAC.
  36 \ No newline at end of file
  37 +         Say Y or M if you want to add support for RPi-DAC.
  38 diff --git a/sound/soc/bcm/Makefile b/sound/soc/bcm/Makefile
  39 index 95a9d44..54e37eb 100644
  40 --- a/sound/soc/bcm/Makefile
  41 +++ b/sound/soc/bcm/Makefile
  42 @@ -5,7 +5,9 @@ obj-$(CONFIG_SND_BCM2708_SOC_I2S) += snd-soc-bcm2708-i2s.o
  43
  44  # BCM2708 Machine Support
  45  snd-soc-hifiberry-dac-objs := hifiberry_dac.o
  46 +snd-soc-hifiberry-digi-objs := hifiberry_digi.o
  47  snd-soc-rpi-dac-objs := rpi-dac.o
  48
  49  obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DAC) += snd-soc-hifiberry-dac.o
  50 +obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DIGI) += snd-soc-hifiberry-digi.o
  51  obj-$(CONFIG_SND_BCM2708_SOC_RPI_DAC) += snd-soc-rpi-dac.o
  52 diff --git a/sound/soc/bcm/hifiberry_digi.c b/sound/soc/bcm/hifiberry_digi.c
  53 new file mode 100644
  54 index 0000000..5b37e66
  55 --- /dev/null
  56 +++ b/sound/soc/bcm/hifiberry_digi.c
  57 @@ -0,0 +1,153 @@
  58 +/*
  59 + * ASoC Driver for HifiBerry Digi
  60 + *
  61 + * Author: Daniel Matuschek <info@crazy-audio.com>
  62 + * based on the HifiBerry DAC driver by Florian Meier <florian.meier@koalo.de>
  63 + *     Copyright 2013
  64 + *
  65 + * This program is free software; you can redistribute it and/or
  66 + * modify it under the terms of the GNU General Public License
  67 + * version 2 as published by the Free Software Foundation.
  68 + *
  69 + * This program is distributed in the hope that it will be useful, but
  70 + * WITHOUT ANY WARRANTY; without even the implied warranty of
  71 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  72 + * General Public License for more details.
  73 + */
  74 +
  75 +#include <linux/module.h>
  76 +#include <linux/platform_device.h>
  77 +
  78 +#include <sound/core.h>
  79 +#include <sound/pcm.h>
  80 +#include <sound/pcm_params.h>
  81 +#include <sound/soc.h>
  82 +#include <sound/jack.h>
  83 +
  84 +#include "../codecs/wm8804.h"
  85 +
  86 +static int samplerate=44100;
  87 +
  88 +static int snd_rpi_hifiberry_digi_init(struct snd_soc_pcm_runtime *rtd)
  89 +{
  90 +       struct snd_soc_codec *codec = rtd->codec;
  91 +
  92 +       /* enable TX output */
  93 +       snd_soc_update_bits(codec, WM8804_PWRDN, 0x4, 0x0);
  94 +
  95 +       return 0;
  96 +}
  97 +
  98 +static int snd_rpi_hifiberry_digi_hw_params(struct snd_pcm_substream *substream,
  99 +                                      struct snd_pcm_hw_params *params)
 100 +{
 101 +       struct snd_soc_pcm_runtime *rtd = substream->private_data;
 102 +       struct snd_soc_dai *codec_dai = rtd->codec_dai;
 103 +       struct snd_soc_codec *codec = rtd->codec;
 104 +       struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 105 +
 106 +       int sysclk = 27000000; /* This is fixed on this board */
 107 +
 108 +       long mclk_freq=0;
 109 +       int mclk_div=1;
 110 +
 111 +       int ret;
 112 +
 113 +       samplerate = params_rate(params);
 114 +
 115 +       switch (samplerate) {
 116 +               case 44100:
 117 +               case 48000:
 118 +               case 88200:
 119 +               case 96000:
 120 +                       mclk_freq=samplerate*256;
 121 +                       mclk_div=WM8804_MCLKDIV_256FS;
 122 +                       break;
 123 +               case 176400:
 124 +               case 192000:
 125 +                       mclk_freq=samplerate*128;
 126 +                       mclk_div=WM8804_MCLKDIV_128FS;
 127 +                       break;
 128 +               default:
 129 +                       dev_err(substream->pcm->dev,
 130 +                       "Failed to set WM8804 SYSCLK, unsupported samplerate\n");
 131 +       }
 132 +
 133 +       snd_soc_dai_set_clkdiv(codec_dai, WM8804_MCLK_DIV, mclk_div);
 134 +       snd_soc_dai_set_pll(codec_dai, 0, 0, sysclk, mclk_freq);
 135 +
 136 +       ret = snd_soc_dai_set_sysclk(codec_dai, WM8804_TX_CLKSRC_PLL,
 137 +                                       sysclk, SND_SOC_CLOCK_OUT);
 138 +       if (ret < 0) {
 139 +               dev_err(substream->pcm->dev,
 140 +               "Failed to set WM8804 SYSCLK: %d\n", ret);
 141 +               return ret;
 142 +       }
 143 +
 144 +       /* Enable TX output */
 145 +       snd_soc_update_bits(codec, WM8804_PWRDN, 0x4, 0x0);
 146 +
 147 +       /* Power on */
 148 +       snd_soc_update_bits(codec, WM8804_PWRDN, 0x9, 0);
 149 +
 150 +       return snd_soc_dai_set_bclk_ratio(cpu_dai,64);
 151 +}
 152 +
 153 +/* machine stream operations */
 154 +static struct snd_soc_ops snd_rpi_hifiberry_digi_ops = {
 155 +       .hw_params = snd_rpi_hifiberry_digi_hw_params,
 156 +};
 157 +
 158 +static struct snd_soc_dai_link snd_rpi_hifiberry_digi_dai[] = {
 159 +{
 160 +       .name           = "HifiBerry Digi",
 161 +       .stream_name    = "HifiBerry Digi HiFi",
 162 +       .cpu_dai_name   = "bcm2708-i2s.0",
 163 +       .codec_dai_name = "wm8804-spdif",
 164 +       .platform_name  = "bcm2708-i2s.0",
 165 +       .codec_name     = "wm8804.1-003b",
 166 +       .dai_fmt        = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 167 +                               SND_SOC_DAIFMT_CBM_CFM,
 168 +       .ops            = &snd_rpi_hifiberry_digi_ops,
 169 +       .init           = snd_rpi_hifiberry_digi_init,
 170 +},
 171 +};
 172 +
 173 +/* audio machine driver */
 174 +static struct snd_soc_card snd_rpi_hifiberry_digi = {
 175 +       .name         = "snd_rpi_hifiberry_digi",
 176 +       .dai_link     = snd_rpi_hifiberry_digi_dai,
 177 +       .num_links    = ARRAY_SIZE(snd_rpi_hifiberry_digi_dai),
 178 +};
 179 +
 180 +static int snd_rpi_hifiberry_digi_probe(struct platform_device *pdev)
 181 +{
 182 +       int ret = 0;
 183 +
 184 +       snd_rpi_hifiberry_digi.dev = &pdev->dev;
 185 +       ret = snd_soc_register_card(&snd_rpi_hifiberry_digi);
 186 +       if (ret)
 187 +               dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n", ret);
 188 +
 189 +       return ret;
 190 +}
 191 +
 192 +static int snd_rpi_hifiberry_digi_remove(struct platform_device *pdev)
 193 +{
 194 +       return snd_soc_unregister_card(&snd_rpi_hifiberry_digi);
 195 +}
 196 +
 197 +static struct platform_driver snd_rpi_hifiberry_digi_driver = {
 198 +       .driver = {
 199 +               .name   = "snd-hifiberry-digi",
 200 +               .owner  = THIS_MODULE,
 201 +       },
 202 +       .probe          = snd_rpi_hifiberry_digi_probe,
 203 +       .remove         = snd_rpi_hifiberry_digi_remove,
 204 +};
 205 +
 206 +module_platform_driver(snd_rpi_hifiberry_digi_driver);
 207 +
 208 +MODULE_AUTHOR("Daniel Matuschek <info@crazy-audio.com>");
 209 +MODULE_DESCRIPTION("ASoC Driver for HifiBerry Digi");
 210 +MODULE_LICENSE("GPL v2");
 211 --
 212 1.9.1
 213