target/linux/brcm2708/patches-3.14/0044-ASoC-BCM-Add-support-for-HiFiBerry-Digi.-Driver-is-b.patch

   1 From dad63ece33a339a45c992915eae9d7d8885e98c7 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 44/54] 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 diff --git a/sound/soc/bcm/Kconfig b/sound/soc/bcm/Kconfig
  16 index 714841d..e563dbc 100644
  17 --- a/sound/soc/bcm/Kconfig
  18 +++ b/sound/soc/bcm/Kconfig
  19 @@ -26,6 +26,13 @@ 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 diff --git a/sound/soc/bcm/Makefile b/sound/soc/bcm/Makefile
  34 index ccc9809..826df7d 100644
  35 --- a/sound/soc/bcm/Makefile
  36 +++ b/sound/soc/bcm/Makefile
  37 @@ -10,7 +10,9 @@ obj-$(CONFIG_SND_BCM2708_SOC_I2S) += snd-soc-bcm2708-i2s.o
  38
  39  # BCM2708 Machine Support
  40  snd-soc-hifiberry-dac-objs := hifiberry_dac.o
  41 +snd-soc-hifiberry-digi-objs := hifiberry_digi.o
  42  snd-soc-rpi-dac-objs := rpi-dac.o
  43
  44  obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DAC) += snd-soc-hifiberry-dac.o
  45 +obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DIGI) += snd-soc-hifiberry-digi.o
  46  obj-$(CONFIG_SND_BCM2708_SOC_RPI_DAC) += snd-soc-rpi-dac.o
  47 diff --git a/sound/soc/bcm/hifiberry_digi.c b/sound/soc/bcm/hifiberry_digi.c
  48 new file mode 100644
  49 index 0000000..e4f769d
  50 --- /dev/null
  51 +++ b/sound/soc/bcm/hifiberry_digi.c
  52 @@ -0,0 +1,153 @@
  53 +/*
  54 + * ASoC Driver for HifiBerry Digi
  55 + *
  56 + * Author: Daniel Matuschek <info@crazy-audio.com>
  57 + * based on the HifiBerry DAC driver by Florian Meier <florian.meier@koalo.de>
  58 + *     Copyright 2013
  59 + *
  60 + * This program is free software; you can redistribute it and/or
  61 + * modify it under the terms of the GNU General Public License
  62 + * version 2 as published by the Free Software Foundation.
  63 + *
  64 + * This program is distributed in the hope that it will be useful, but
  65 + * WITHOUT ANY WARRANTY; without even the implied warranty of
  66 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  67 + * General Public License for more details.
  68 + */
  69 +
  70 +#include <linux/module.h>
  71 +#include <linux/platform_device.h>
  72 +
  73 +#include <sound/core.h>
  74 +#include <sound/pcm.h>
  75 +#include <sound/pcm_params.h>
  76 +#include <sound/soc.h>
  77 +#include <sound/jack.h>
  78 +
  79 +#include "../codecs/wm8804.h"
  80 +
  81 +static int samplerate=44100;
  82 +
  83 +static int snd_rpi_hifiberry_digi_init(struct snd_soc_pcm_runtime *rtd)
  84 +{
  85 +       struct snd_soc_codec *codec = rtd->codec;
  86 +
  87 +       /* enable TX output */
  88 +       snd_soc_update_bits(codec, WM8804_PWRDN, 0x4, 0x0);
  89 +
  90 +       return 0;
  91 +}
  92 +
  93 +static int snd_rpi_hifiberry_digi_hw_params(struct snd_pcm_substream *substream,
  94 +                                      struct snd_pcm_hw_params *params)
  95 +{
  96 +       struct snd_soc_pcm_runtime *rtd = substream->private_data;
  97 +       struct snd_soc_dai *codec_dai = rtd->codec_dai;
  98 +       struct snd_soc_codec *codec = rtd->codec;
  99 +       struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 100 +
 101 +       int sysclk = 27000000; /* This is fixed on this board */
 102 +
 103 +       long mclk_freq=0;
 104 +       int mclk_div=1;
 105 +
 106 +       int ret;
 107 +
 108 +       samplerate = params_rate(params);
 109 +
 110 +       switch (samplerate) {
 111 +               case 44100:
 112 +               case 48000:
 113 +               case 88200:
 114 +               case 96000:
 115 +                       mclk_freq=samplerate*256;
 116 +                       mclk_div=WM8804_MCLKDIV_256FS;
 117 +                       break;
 118 +               case 176400:
 119 +               case 192000:
 120 +                       mclk_freq=samplerate*128;
 121 +                       mclk_div=WM8804_MCLKDIV_128FS;
 122 +                       break;
 123 +               default:
 124 +                       dev_err(substream->pcm->dev,
 125 +                       "Failed to set WM8804 SYSCLK, unsupported samplerate\n");
 126 +       }
 127 +
 128 +       snd_soc_dai_set_clkdiv(codec_dai, WM8804_MCLK_DIV, mclk_div);
 129 +       snd_soc_dai_set_pll(codec_dai, 0, 0, sysclk, mclk_freq);
 130 +
 131 +       ret = snd_soc_dai_set_sysclk(codec_dai, WM8804_TX_CLKSRC_PLL,
 132 +                                       sysclk, SND_SOC_CLOCK_OUT);
 133 +       if (ret < 0) {
 134 +               dev_err(substream->pcm->dev,
 135 +               "Failed to set WM8804 SYSCLK: %d\n", ret);
 136 +               return ret;
 137 +       }
 138 +
 139 +       /* Enable TX output */
 140 +       snd_soc_update_bits(codec, WM8804_PWRDN, 0x4, 0x0);
 141 +
 142 +       /* Power on */
 143 +       snd_soc_update_bits(codec, WM8804_PWRDN, 0x9, 0);
 144 +
 145 +       return snd_soc_dai_set_bclk_ratio(cpu_dai,64);
 146 +}
 147 +
 148 +/* machine stream operations */
 149 +static struct snd_soc_ops snd_rpi_hifiberry_digi_ops = {
 150 +       .hw_params = snd_rpi_hifiberry_digi_hw_params,
 151 +};
 152 +
 153 +static struct snd_soc_dai_link snd_rpi_hifiberry_digi_dai[] = {
 154 +{
 155 +       .name           = "HifiBerry Digi",
 156 +       .stream_name    = "HifiBerry Digi HiFi",
 157 +       .cpu_dai_name   = "bcm2708-i2s.0",
 158 +       .codec_dai_name = "wm8804-spdif",
 159 +       .platform_name  = "bcm2708-i2s.0",
 160 +       .codec_name     = "wm8804.1-003b",
 161 +       .dai_fmt        = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 162 +                               SND_SOC_DAIFMT_CBM_CFM,
 163 +       .ops            = &snd_rpi_hifiberry_digi_ops,
 164 +       .init           = snd_rpi_hifiberry_digi_init,
 165 +},
 166 +};
 167 +
 168 +/* audio machine driver */
 169 +static struct snd_soc_card snd_rpi_hifiberry_digi = {
 170 +       .name         = "snd_rpi_hifiberry_digi",
 171 +       .dai_link     = snd_rpi_hifiberry_digi_dai,
 172 +       .num_links    = ARRAY_SIZE(snd_rpi_hifiberry_digi_dai),
 173 +};
 174 +
 175 +static int snd_rpi_hifiberry_digi_probe(struct platform_device *pdev)
 176 +{
 177 +       int ret = 0;
 178 +
 179 +       snd_rpi_hifiberry_digi.dev = &pdev->dev;
 180 +       ret = snd_soc_register_card(&snd_rpi_hifiberry_digi);
 181 +       if (ret)
 182 +               dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n", ret);
 183 +
 184 +       return ret;
 185 +}
 186 +
 187 +static int snd_rpi_hifiberry_digi_remove(struct platform_device *pdev)
 188 +{
 189 +       return snd_soc_unregister_card(&snd_rpi_hifiberry_digi);
 190 +}
 191 +
 192 +static struct platform_driver snd_rpi_hifiberry_digi_driver = {
 193 +       .driver = {
 194 +               .name   = "snd-hifiberry-digi",
 195 +               .owner  = THIS_MODULE,
 196 +       },
 197 +       .probe          = snd_rpi_hifiberry_digi_probe,
 198 +       .remove         = snd_rpi_hifiberry_digi_remove,
 199 +};
 200 +
 201 +module_platform_driver(snd_rpi_hifiberry_digi_driver);
 202 +
 203 +MODULE_AUTHOR("Daniel Matuschek <info@crazy-audio.com>");
 204 +MODULE_DESCRIPTION("ASoC Driver for HifiBerry Digi");
 205 +MODULE_LICENSE("GPL v2");
 206 --
 207 1.9.1
 208