target/linux/brcm2708/patches-4.9/0077-RaspiDAC3-support.patch

   1 From 26084a968083e88298416426576dbd4c006e5dea Mon Sep 17 00:00:00 2001
   2 From: Jan Grulich <jan@grulich.eu>
   3 Date: Mon, 24 Aug 2015 16:03:47 +0100
   4 Subject: [PATCH] RaspiDAC3 support
   5
   6 Signed-off-by: Jan Grulich <jan@grulich.eu>
   7
   8 config: fix RaspiDAC Rev.3x dependencies
   9
  10 Change depends to SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
  11 like the other I2S soundcard drivers.
  12
  13 Signed-off-by: Matthias Reichl <hias@horus.com>
  14 ---
  15  sound/soc/bcm/Kconfig     |   8 ++
  16  sound/soc/bcm/Makefile    |   2 +
  17  sound/soc/bcm/raspidac3.c | 186 ++++++++++++++++++++++++++++++++++++++++++++++
  18  3 files changed, 196 insertions(+)
  19  create mode 100644 sound/soc/bcm/raspidac3.c
  20
  21 --- a/sound/soc/bcm/Kconfig
  22 +++ b/sound/soc/bcm/Kconfig
  23 @@ -58,3 +58,11 @@ config SND_BCM2708_SOC_IQAUDIO_DAC
  24         select SND_SOC_PCM512x_I2C
  25         help
  26           Say Y or M if you want to add support for IQaudIO-DAC.
  27 +
  28 +config SND_BCM2708_SOC_RASPIDAC3
  29 +       tristate "Support for RaspiDAC Rev.3x"
  30 +       depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
  31 +       select SND_SOC_PCM512x_I2C
  32 +       select SND_SOC_TPA6130A2
  33 +       help
  34 +         Say Y or M if you want to add support for RaspiDAC Rev.3x.
  35 --- a/sound/soc/bcm/Makefile
  36 +++ b/sound/soc/bcm/Makefile
  37 @@ -15,6 +15,7 @@ snd-soc-hifiberry-digi-objs := hifiberry
  38  snd-soc-rpi-dac-objs := rpi-dac.o
  39  snd-soc-rpi-proto-objs := rpi-proto.o
  40  snd-soc-iqaudio-dac-objs := iqaudio-dac.o
  41 +snd-soc-raspidac3-objs := raspidac3.o
  42
  43  obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DAC) += snd-soc-hifiberry-dac.o
  44  obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUS) += snd-soc-hifiberry-dacplus.o
  45 @@ -22,3 +23,4 @@ obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_D
  46  obj-$(CONFIG_SND_BCM2708_SOC_RPI_DAC) += snd-soc-rpi-dac.o
  47  obj-$(CONFIG_SND_BCM2708_SOC_RPI_PROTO) += snd-soc-rpi-proto.o
  48  obj-$(CONFIG_SND_BCM2708_SOC_IQAUDIO_DAC) += snd-soc-iqaudio-dac.o
  49 +obj-$(CONFIG_SND_BCM2708_SOC_RASPIDAC3) += snd-soc-raspidac3.o
  50 --- /dev/null
  51 +++ b/sound/soc/bcm/raspidac3.c
  52 @@ -0,0 +1,186 @@
  53 +/*
  54 + * ASoC Driver for RaspiDAC v3
  55 + *
  56 + * Author:     Jan Grulich <jan@grulich.eu>
  57 + *             Copyright 2015
  58 + *              based on code by Daniel Matuschek <daniel@hifiberry.com>
  59 + *             based on code by Florian Meier <florian.meier@koalo.de>
  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 +#include <sound/soc-dapm.h>
  80 +
  81 +#include "../codecs/pcm512x.h"
  82 +#include "../codecs/tpa6130a2.h"
  83 +
  84 +/* sound card init */
  85 +static int snd_rpi_raspidac3_init(struct snd_soc_pcm_runtime *rtd)
  86 +{
  87 +       int ret;
  88 +       struct snd_soc_card *card = rtd->card;
  89 +       struct snd_soc_codec *codec = rtd->codec;
  90 +       snd_soc_update_bits(codec, PCM512x_GPIO_EN, 0x08, 0x08);
  91 +       snd_soc_update_bits(codec, PCM512x_GPIO_OUTPUT_4, 0xf, 0x02);
  92 +       snd_soc_update_bits(codec, PCM512x_GPIO_CONTROL_1, 0x08,0x00);
  93 +
  94 +       ret = snd_soc_limit_volume(card, "Digital Playback Volume", 207);
  95 +       if (ret < 0)
  96 +               dev_warn(card->dev, "Failed to set volume limit: %d\n", ret);
  97 +       else {
  98 +               struct snd_kcontrol *kctl;
  99 +
 100 +               ret = snd_soc_limit_volume(card,
 101 +                                          "TPA6130A2 Headphone Playback Volume",
 102 +                                          54);
 103 +               if (ret < 0)
 104 +                       dev_warn(card->dev, "Failed to set TPA6130A2 volume limit: %d\n",
 105 +                                ret);
 106 +               kctl = snd_soc_card_get_kcontrol(card,
 107 +                                                "TPA6130A2 Headphone Playback Volume");
 108 +               if (kctl) {
 109 +                       strcpy(kctl->id.name, "Headphones Playback Volume");
 110 +                       /* disable the volume dB scale so alsamixer works */
 111 +                       kctl->vd[0].access = SNDRV_CTL_ELEM_ACCESS_READWRITE;
 112 +               }
 113 +
 114 +               kctl = snd_soc_card_get_kcontrol(card,
 115 +                                                "TPA6130A2 Headphone Playback Switch");
 116 +               if (kctl)
 117 +                       strcpy(kctl->id.name, "Headphones Playback Switch");
 118 +       }
 119 +
 120 +       return 0;
 121 +}
 122 +
 123 +/* set hw parameters */
 124 +static int snd_rpi_raspidac3_hw_params(struct snd_pcm_substream *substream,
 125 +                                      struct snd_pcm_hw_params *params)
 126 +{
 127 +       struct snd_soc_pcm_runtime *rtd = substream->private_data;
 128 +       struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 129 +
 130 +       unsigned int sample_bits =
 131 +               snd_pcm_format_physical_width(params_format(params));
 132 +
 133 +       return snd_soc_dai_set_bclk_ratio(cpu_dai, sample_bits * 2);
 134 +}
 135 +
 136 +/* startup */
 137 +static int snd_rpi_raspidac3_startup(struct snd_pcm_substream *substream) {
 138 +       struct snd_soc_pcm_runtime *rtd = substream->private_data;
 139 +       struct snd_soc_codec *codec = rtd->codec;
 140 +       snd_soc_update_bits(codec, PCM512x_GPIO_CONTROL_1, 0x08,0x08);
 141 +       return 0;
 142 +}
 143 +
 144 +/* shutdown */
 145 +static void snd_rpi_raspidac3_shutdown(struct snd_pcm_substream *substream) {
 146 +       struct snd_soc_pcm_runtime *rtd = substream->private_data;
 147 +       struct snd_soc_codec *codec = rtd->codec;
 148 +       snd_soc_update_bits(codec, PCM512x_GPIO_CONTROL_1, 0x08,0x00);
 149 +}
 150 +
 151 +/* machine stream operations */
 152 +static struct snd_soc_ops snd_rpi_raspidac3_ops = {
 153 +       .hw_params = snd_rpi_raspidac3_hw_params,
 154 +       .startup = snd_rpi_raspidac3_startup,
 155 +       .shutdown = snd_rpi_raspidac3_shutdown,
 156 +};
 157 +
 158 +/* interface setup */
 159 +static struct snd_soc_dai_link snd_rpi_raspidac3_dai[] = {
 160 +{
 161 +       .name           = "RaspiDAC Rev.3x",
 162 +       .stream_name    = "RaspiDAC HiFi",
 163 +       .cpu_dai_name   = "bcm2708-i2s.0",
 164 +       .codec_dai_name = "pcm512x-hifi",
 165 +       .platform_name  = "bcm2708-i2s.0",
 166 +       .codec_name     = "pcm512x.1-004c",
 167 +       .dai_fmt        = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 168 +                               SND_SOC_DAIFMT_CBS_CFS,
 169 +       .ops            = &snd_rpi_raspidac3_ops,
 170 +       .init           = snd_rpi_raspidac3_init,
 171 +},
 172 +};
 173 +
 174 +/* audio machine driver */
 175 +static struct snd_soc_card snd_rpi_raspidac3 = {
 176 +       .name         = "RaspiDAC Rev.3x HiFi Audio Card",
 177 +       .owner        = THIS_MODULE,
 178 +       .dai_link     = snd_rpi_raspidac3_dai,
 179 +       .num_links    = ARRAY_SIZE(snd_rpi_raspidac3_dai),
 180 +};
 181 +
 182 +/* sound card test */
 183 +static int snd_rpi_raspidac3_probe(struct platform_device *pdev)
 184 +{
 185 +       int ret = 0;
 186 +
 187 +       snd_rpi_raspidac3.dev = &pdev->dev;
 188 +
 189 +       if (pdev->dev.of_node) {
 190 +           struct device_node *i2s_node;
 191 +           struct snd_soc_dai_link *dai = &snd_rpi_raspidac3_dai[0];
 192 +           i2s_node = of_parse_phandle(pdev->dev.of_node,
 193 +                                       "i2s-controller", 0);
 194 +
 195 +           if (i2s_node) {
 196 +               dai->cpu_dai_name = NULL;
 197 +               dai->cpu_of_node = i2s_node;
 198 +               dai->platform_name = NULL;
 199 +               dai->platform_of_node = i2s_node;
 200 +           }
 201 +       }
 202 +
 203 +       ret = snd_soc_register_card(&snd_rpi_raspidac3);
 204 +       if (ret)
 205 +               dev_err(&pdev->dev,
 206 +                       "snd_soc_register_card() failed: %d\n", ret);
 207 +
 208 +       return ret;
 209 +}
 210 +
 211 +/* sound card disconnect */
 212 +static int snd_rpi_raspidac3_remove(struct platform_device *pdev)
 213 +{
 214 +       return snd_soc_unregister_card(&snd_rpi_raspidac3);
 215 +}
 216 +
 217 +static const struct of_device_id raspidac3_of_match[] = {
 218 +       { .compatible = "jg,raspidacv3", },
 219 +       {},
 220 +};
 221 +MODULE_DEVICE_TABLE(of, raspidac3_of_match);
 222 +
 223 +/* sound card platform driver */
 224 +static struct platform_driver snd_rpi_raspidac3_driver = {
 225 +       .driver = {
 226 +               .name   = "snd-rpi-raspidac3",
 227 +               .owner  = THIS_MODULE,
 228 +               .of_match_table = raspidac3_of_match,
 229 +       },
 230 +       .probe          = snd_rpi_raspidac3_probe,
 231 +       .remove         = snd_rpi_raspidac3_remove,
 232 +};
 233 +
 234 +module_platform_driver(snd_rpi_raspidac3_driver);
 235 +
 236 +MODULE_AUTHOR("Jan Grulich <jan@grulich.eu>");
 237 +MODULE_DESCRIPTION("ASoC Driver for RaspiDAC Rev.3x");
 238 +MODULE_LICENSE("GPL v2");