target/linux/brcm2708/patches-4.19/950-0260-ASoC-Add-support-for-AudioSense-Pi-add-on-soundcard.patch

   1 From 5705594ae56861cb63e7a3de1854e29ad1e830fd Mon Sep 17 00:00:00 2001
   2 From: b-ak <anur.bhargav@gmail.com>
   3 Date: Thu, 3 Jan 2019 00:01:08 +0530
   4 Subject: [PATCH] ASoC: Add support for AudioSense-Pi add-on soundcard
   5
   6 AudioSense-Pi is a RPi HAT based on a TI's TLV320AIC32x4 stereo codec
   7
   8 This hardware provides multiple audio I/O capabilities to the RPi.
   9 The codec connects to the RPi's SoC through the I2S Bus.
  10
  11 The following devices can be connected through a 3.5mm jack
  12         1. Line-In: Plain old audio in from mobile phones, PCs, etc.,
  13         2. Mic-In: Connect a microphone
  14         3. Line-Out: Connect the output to a speaker
  15         4. Headphones: Connect a Headphone w or w/o microphones
  16
  17 Multiple Inputs:
  18         It supports the following combinations
  19         1. Two stereo Line-Inputs and a microphone
  20         2. One stereo Line-Input and two microphones
  21         3. Two stereo Line-Inputs, a microphone and
  22                 one mono line-input (with h/w hack)
  23         4. One stereo Line-Input, two microphones and
  24                 one mono line-input (with h/w hack)
  25
  26 Multiple Outputs:
  27         Audio output can be routed to the headphones or
  28                 speakers (with additional hardware)
  29
  30 Signed-off-by: b-ak <anur.bhargav@gmail.com>
  31 ---
  32  sound/soc/bcm/Kconfig         |   7 +
  33  sound/soc/bcm/Makefile        |   2 +
  34  sound/soc/bcm/audiosense-pi.c | 246 ++++++++++++++++++++++++++++++++++
  35  3 files changed, 255 insertions(+)
  36  create mode 100644 sound/soc/bcm/audiosense-pi.c
  37
  38 --- a/sound/soc/bcm/Kconfig
  39 +++ b/sound/soc/bcm/Kconfig
  40 @@ -137,6 +137,13 @@ config SND_AUDIOINJECTOR_OCTO_SOUNDCARD
  41         help
  42           Say Y or M if you want to add support for audioinjector.net octo add on
  43
  44 +config SND_AUDIOSENSE_PI
  45 +       tristate "Support for AudioSense Add-On Soundcard"
  46 +       depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
  47 +       select SND_SOC_TLV320AIC32X4_I2C
  48 +       help
  49 +         Say Y or M if you want to add support for tlv320aic32x4 add-on
  50 +
  51  config SND_DIGIDAC1_SOUNDCARD
  52          tristate "Support for Red Rocks Audio DigiDAC1"
  53          depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
  54 --- a/sound/soc/bcm/Makefile
  55 +++ b/sound/soc/bcm/Makefile
  56 @@ -20,6 +20,7 @@ snd-soc-rpi-proto-objs := rpi-proto.o
  57  snd-soc-iqaudio-dac-objs := iqaudio-dac.o
  58  snd-soc-audioinjector-pi-soundcard-objs := audioinjector-pi-soundcard.o
  59  snd-soc-audioinjector-octo-soundcard-objs := audioinjector-octo-soundcard.o
  60 +snd-soc-audiosense-pi-objs := audiosense-pi.o
  61  snd-soc-digidac1-soundcard-objs := digidac1-soundcard.o
  62  snd-soc-dionaudio-loco-objs := dionaudio_loco.o
  63  snd-soc-dionaudio-loco-v2-objs := dionaudio_loco-v2.o
  64 @@ -41,6 +42,7 @@ obj-$(CONFIG_SND_BCM2708_SOC_RPI_PROTO)
  65  obj-$(CONFIG_SND_BCM2708_SOC_IQAUDIO_DAC) += snd-soc-iqaudio-dac.o
  66  obj-$(CONFIG_SND_AUDIOINJECTOR_PI_SOUNDCARD) += snd-soc-audioinjector-pi-soundcard.o
  67  obj-$(CONFIG_SND_AUDIOINJECTOR_OCTO_SOUNDCARD) += snd-soc-audioinjector-octo-soundcard.o
  68 +obj-$(CONFIG_SND_AUDIOSENSE_PI) += snd-soc-audiosense-pi.o
  69  obj-$(CONFIG_SND_DIGIDAC1_SOUNDCARD) += snd-soc-digidac1-soundcard.o
  70  obj-$(CONFIG_SND_BCM2708_SOC_DIONAUDIO_LOCO) += snd-soc-dionaudio-loco.o
  71  obj-$(CONFIG_SND_BCM2708_SOC_DIONAUDIO_LOCO_V2) += snd-soc-dionaudio-loco-v2.o
  72 --- /dev/null
  73 +++ b/sound/soc/bcm/audiosense-pi.c
  74 @@ -0,0 +1,246 @@
  75 +/*
  76 + * ASoC Driver for AudioSense add on soundcard
  77 + * Author:
  78 + *     Bhargav A K <anur.bhargav@gmail.com>
  79 + *     Copyright 2017
  80 + *
  81 + * This program is free software; you can redistribute it and/or
  82 + * modify it under the terms of the GNU General Public License
  83 + * version 2 as published by the Free Software Foundation.
  84 + *
  85 + * This program is distributed in the hope that it will be useful, but
  86 + * WITHOUT ANY WARRANTY; without even the implied warranty of
  87 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  88 + * General Public License for more details.
  89 + */
  90 +
  91 +#include <linux/module.h>
  92 +#include <linux/platform_device.h>
  93 +#include <linux/clk.h>
  94 +#include <linux/i2c.h>
  95 +#include <sound/core.h>
  96 +#include <sound/pcm.h>
  97 +#include <sound/pcm_params.h>
  98 +#include <sound/soc.h>
  99 +#include <sound/jack.h>
 100 +#include <sound/control.h>
 101 +
 102 +#include <sound/tlv320aic32x4.h>
 103 +#include "../codecs/tlv320aic32x4.h"
 104 +
 105 +#define AIC32X4_SYSCLK_XTAL    0x00
 106 +
 107 +/*
 108 + * Setup Codec Sample Rates and Channels
 109 + * Supported Rates:
 110 + *     8000, 11025, 16000, 22050, 32000, 44100, 48000, 64000, 88200, 96000,
 111 + */
 112 +static const unsigned int audiosense_pi_rate[] = {
 113 +       48000,
 114 +};
 115 +
 116 +static struct snd_pcm_hw_constraint_list audiosense_constraints_rates = {
 117 +       .list = audiosense_pi_rate,
 118 +       .count = ARRAY_SIZE(audiosense_pi_rate),
 119 +};
 120 +
 121 +static const unsigned int audiosense_pi_channels[] = {
 122 +       2,
 123 +};
 124 +
 125 +static struct snd_pcm_hw_constraint_list audiosense_constraints_ch = {
 126 +       .count = ARRAY_SIZE(audiosense_pi_channels),
 127 +       .list = audiosense_pi_channels,
 128 +       .mask = 0,
 129 +};
 130 +
 131 +/* Setup DAPM widgets and paths */
 132 +static const struct snd_soc_dapm_widget audiosense_pi_dapm_widgets[] = {
 133 +       SND_SOC_DAPM_HP("Headphone Jack", NULL),
 134 +       SND_SOC_DAPM_LINE("Line Out", NULL),
 135 +       SND_SOC_DAPM_LINE("Line In", NULL),
 136 +       SND_SOC_DAPM_INPUT("CM_L"),
 137 +       SND_SOC_DAPM_INPUT("CM_R"),
 138 +};
 139 +
 140 +static const struct snd_soc_dapm_route audiosense_pi_audio_map[] = {
 141 +       /* Line Inputs are connected to
 142 +        * (IN1_L | IN1_R)
 143 +        * (IN2_L | IN2_R)
 144 +        * (IN3_L | IN3_R)
 145 +        */
 146 +       {"IN1_L", NULL, "Line In"},
 147 +       {"IN1_R", NULL, "Line In"},
 148 +       {"IN2_L", NULL, "Line In"},
 149 +       {"IN2_R", NULL, "Line In"},
 150 +       {"IN3_L", NULL, "Line In"},
 151 +       {"IN3_R", NULL, "Line In"},
 152 +
 153 +       /* Mic is connected to IN2_L and IN2_R */
 154 +       {"Left ADC", NULL, "Mic Bias"},
 155 +       {"Right ADC", NULL, "Mic Bias"},
 156 +
 157 +       /* Headphone connected to HPL, HPR */
 158 +       {"Headphone Jack", NULL, "HPL"},
 159 +       {"Headphone Jack", NULL, "HPR"},
 160 +
 161 +       /* Speakers connected to LOL and LOR */
 162 +       {"Line Out", NULL, "LOL"},
 163 +       {"Line Out", NULL, "LOR"},
 164 +};
 165 +
 166 +static int audiosense_pi_card_init(struct snd_soc_pcm_runtime *rtd)
 167 +{
 168 +       /* TODO: init of the codec specific dapm data, ignore suspend/resume */
 169 +       struct snd_soc_component *component = rtd->codec_dai->component;
 170 +
 171 +       snd_soc_component_update_bits(component, AIC32X4_MICBIAS, 0x78,
 172 +                                     AIC32X4_MICBIAS_LDOIN |
 173 +                                     AIC32X4_MICBIAS_2075V);
 174 +       snd_soc_component_update_bits(component, AIC32X4_PWRCFG, 0x08,
 175 +                                     AIC32X4_AVDDWEAKDISABLE);
 176 +       snd_soc_component_update_bits(component, AIC32X4_LDOCTL, 0x01,
 177 +                                     AIC32X4_LDOCTLEN);
 178 +
 179 +       return 0;
 180 +}
 181 +
 182 +static int audiosense_pi_card_hw_params(
 183 +               struct snd_pcm_substream *substream,
 184 +               struct snd_pcm_hw_params *params)
 185 +{
 186 +       int ret = 0;
 187 +       struct snd_soc_pcm_runtime *rtd = substream->private_data;
 188 +       struct snd_soc_dai *codec_dai = rtd->codec_dai;
 189 +
 190 +       /* Set the codec system clock, there is a 12 MHz XTAL on the board */
 191 +       ret = snd_soc_dai_set_sysclk(codec_dai, AIC32X4_SYSCLK_XTAL,
 192 +                                    12000000, SND_SOC_CLOCK_IN);
 193 +       if (ret) {
 194 +               dev_err(rtd->card->dev,
 195 +                       "could not set codec driver clock params\n");
 196 +               return ret;
 197 +       }
 198 +       return 0;
 199 +}
 200 +
 201 +static int audiosense_pi_card_startup(struct snd_pcm_substream *substream)
 202 +{
 203 +       struct snd_pcm_runtime *runtime = substream->runtime;
 204 +
 205 +       /*
 206 +        * Set codec to 48Khz Sampling, Stereo I/O and 16 bit audio
 207 +        */
 208 +       runtime->hw.channels_max = 2;
 209 +       snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
 210 +                                  &audiosense_constraints_ch);
 211 +
 212 +       runtime->hw.formats = SNDRV_PCM_FMTBIT_S16_LE;
 213 +       snd_pcm_hw_constraint_msbits(runtime, 0, 16, 16);
 214 +
 215 +
 216 +       snd_pcm_hw_constraint_list(substream->runtime, 0,
 217 +                                  SNDRV_PCM_HW_PARAM_RATE,
 218 +                                  &audiosense_constraints_rates);
 219 +       return 0;
 220 +}
 221 +
 222 +static struct snd_soc_ops audiosense_pi_card_ops = {
 223 +       .startup = audiosense_pi_card_startup,
 224 +       .hw_params = audiosense_pi_card_hw_params,
 225 +};
 226 +
 227 +static struct snd_soc_dai_link audiosense_pi_card_dai[] = {
 228 +       {
 229 +               .name           = "TLV320AIC3204 Audio",
 230 +               .stream_name    = "TLV320AIC3204 Hifi Audio",
 231 +               .cpu_dai_name   = "bcm2708-i2s.0",
 232 +               .codec_dai_name = "tlv320aic32x4-hifi",
 233 +               .platform_name  = "bcm2708-i2s.0",
 234 +               .codec_name     = "tlv320aic32x4.1-0018",
 235 +               .dai_fmt        = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 236 +                       SND_SOC_DAIFMT_CBM_CFM,
 237 +               .ops            = &audiosense_pi_card_ops,
 238 +               .init           = audiosense_pi_card_init,
 239 +       },
 240 +};
 241 +
 242 +static struct snd_soc_card audiosense_pi_card = {
 243 +       .name           = "audiosense-pi",
 244 +       .driver_name    = "audiosense-pi",
 245 +       .dai_link       = audiosense_pi_card_dai,
 246 +       .owner          = THIS_MODULE,
 247 +       .num_links      = ARRAY_SIZE(audiosense_pi_card_dai),
 248 +       .dapm_widgets   = audiosense_pi_dapm_widgets,
 249 +       .num_dapm_widgets = ARRAY_SIZE(audiosense_pi_dapm_widgets),
 250 +       .dapm_routes    = audiosense_pi_audio_map,
 251 +       .num_dapm_routes = ARRAY_SIZE(audiosense_pi_audio_map),
 252 +};
 253 +
 254 +static int audiosense_pi_card_probe(struct platform_device *pdev)
 255 +{
 256 +       int ret = 0;
 257 +       struct snd_soc_card *card = &audiosense_pi_card;
 258 +       struct snd_soc_dai_link *dai = &audiosense_pi_card_dai[0];
 259 +       struct device_node *i2s_node = pdev->dev.of_node;
 260 +
 261 +       card->dev = &pdev->dev;
 262 +
 263 +       if (!dai) {
 264 +               dev_err(&pdev->dev, "DAI not found. Missing or Invalid\n");
 265 +               return -EINVAL;
 266 +       }
 267 +
 268 +       i2s_node = of_parse_phandle(pdev->dev.of_node, "i2s-controller", 0);
 269 +       if (!i2s_node) {
 270 +               dev_err(&pdev->dev,
 271 +                       "Property 'i2s-controller' missing or invalid\n");
 272 +               return -EINVAL;
 273 +       }
 274 +
 275 +       dai->cpu_dai_name = NULL;
 276 +       dai->cpu_of_node = i2s_node;
 277 +       dai->platform_name = NULL;
 278 +       dai->platform_of_node = i2s_node;
 279 +
 280 +       of_node_put(i2s_node);
 281 +
 282 +       ret = snd_soc_register_card(card);
 283 +       if (ret && ret != -EPROBE_DEFER)
 284 +               dev_err(&pdev->dev,
 285 +                       "snd_soc_register_card() failed: %d\n", ret);
 286 +
 287 +       return ret;
 288 +}
 289 +
 290 +static int audiosense_pi_card_remove(struct platform_device *pdev)
 291 +{
 292 +       struct snd_soc_card *card = platform_get_drvdata(pdev);
 293 +
 294 +       return snd_soc_unregister_card(card);
 295 +
 296 +}
 297 +
 298 +static const struct of_device_id audiosense_pi_card_of_match[] = {
 299 +       { .compatible = "as,audiosense-pi", },
 300 +       {},
 301 +};
 302 +MODULE_DEVICE_TABLE(of, audiosense_pi_card_of_match);
 303 +
 304 +static struct platform_driver audiosense_pi_card_driver = {
 305 +       .driver = {
 306 +               .name = "audiosense-snd-card",
 307 +               .owner = THIS_MODULE,
 308 +               .of_match_table = audiosense_pi_card_of_match,
 309 +       },
 310 +       .probe = audiosense_pi_card_probe,
 311 +       .remove = audiosense_pi_card_remove,
 312 +};
 313 +
 314 +module_platform_driver(audiosense_pi_card_driver);
 315 +
 316 +MODULE_AUTHOR("Bhargav AK <anur.bhargav@gmail.com>");
 317 +MODULE_DESCRIPTION("ASoC Driver for TLV320AIC3204 Audio");
 318 +MODULE_LICENSE("GPL v2");
 319 +MODULE_ALIAS("platform:audiosense-pi");
 320 +