target/linux/bcm27xx/patches-5.10/950-0467-Added-PiFi-Mini-to-rpi-simple-soundcard.c.patch

   1 From 4951e0d22b58566678a16d53bf06851e1b63eeff Mon Sep 17 00:00:00 2001
   2 From: David Knell <david.knell@gmail.com>
   3 Date: Mon, 8 Feb 2021 03:35:15 +0000
   4 Subject: [PATCH] Added PiFi-Mini to rpi-simple-soundcard.c
   5
   6 Signed-off-by: David Knell <david.knell@gmail.com>
   7 ---
   8  sound/soc/bcm/rpi-simple-soundcard.c | 94 +++++++++++++++++++++++++---
   9  1 file changed, 87 insertions(+), 7 deletions(-)
  10
  11 --- a/sound/soc/bcm/rpi-simple-soundcard.c
  12 +++ b/sound/soc/bcm/rpi-simple-soundcard.c
  13 @@ -32,6 +32,7 @@
  14
  15  #include <linux/module.h>
  16  #include <linux/platform_device.h>
  17 +#include <linux/gpio/consumer.h>
  18
  19  #include <sound/core.h>
  20  #include <sound/pcm.h>
  21 @@ -45,6 +46,13 @@ struct snd_rpi_simple_drvdata {
  22         unsigned int fixed_bclk_ratio;
  23  };
  24
  25 +static struct snd_soc_card snd_rpi_simple = {
  26 +       .driver_name  = "RPi-simple",
  27 +       .owner        = THIS_MODULE,
  28 +       .dai_link     = NULL,
  29 +       .num_links    = 1, /* Only a single DAI supported at the moment */
  30 +};
  31 +
  32  static int snd_rpi_simple_init(struct snd_soc_pcm_runtime *rtd)
  33  {
  34         struct snd_rpi_simple_drvdata *drvdata =
  35 @@ -58,6 +66,60 @@ static int snd_rpi_simple_init(struct sn
  36         return 0;
  37  }
  38
  39 +static int pifi_mini_210_init(struct snd_soc_pcm_runtime *rtd)
  40 +{
  41 +       struct snd_soc_component *dac;
  42 +       struct gpio_desc *pdn_gpio, *rst_gpio;
  43 +       struct snd_soc_dai *codec_dai;
  44 +       int ret;
  45 +
  46 +       snd_rpi_simple_init(rtd);
  47 +       codec_dai = asoc_rtd_to_codec(rtd, 0);
  48 +
  49 +       dac = codec_dai[0].component;
  50 +
  51 +       pdn_gpio = devm_gpiod_get_optional(snd_rpi_simple.dev, "pdn",
  52 +                                               GPIOD_OUT_LOW);
  53 +       if (IS_ERR(pdn_gpio)) {
  54 +               ret = PTR_ERR(pdn_gpio);
  55 +               dev_err(snd_rpi_simple.dev, "failed to get pdn gpio: %d\n", ret);
  56 +               return ret;
  57 +       }
  58 +
  59 +       rst_gpio = devm_gpiod_get_optional(snd_rpi_simple.dev, "rst",
  60 +                                               GPIOD_OUT_LOW);
  61 +       if (IS_ERR(rst_gpio)) {
  62 +               ret = PTR_ERR(rst_gpio);
  63 +               dev_err(snd_rpi_simple.dev, "failed to get rst gpio: %d\n", ret);
  64 +               return ret;
  65 +       }
  66 +
  67 +       // Set up cards - pulse power down and reset first, then
  68 +       // set up according to datasheet
  69 +       gpiod_set_value_cansleep(pdn_gpio, 1);
  70 +       gpiod_set_value_cansleep(rst_gpio, 1);
  71 +       usleep_range(1000, 10000);
  72 +       gpiod_set_value_cansleep(pdn_gpio, 0);
  73 +       usleep_range(20000, 30000);
  74 +       gpiod_set_value_cansleep(rst_gpio, 0);
  75 +       usleep_range(20000, 30000);
  76 +
  77 +       // Oscillator trim
  78 +       snd_soc_component_write(dac, 0x1b, 0);
  79 +       usleep_range(60000, 80000);
  80 +
  81 +       // MCLK at 64fs, sample rate 44.1 or 48kHz
  82 +       snd_soc_component_write(dac, 0x00, 0x60);
  83 +
  84 +       // Set up for BTL - AD/BD mode - AD is 0x00107772, BD is 0x00987772
  85 +       snd_soc_component_write(dac, 0x20, 0x00107772);
  86 +
  87 +       // End mute
  88 +       snd_soc_component_write(dac, 0x05, 0x00);
  89 +
  90 +       return 0;
  91 +}
  92 +
  93  static int snd_rpi_simple_hw_params(struct snd_pcm_substream *substream,
  94                 struct snd_pcm_hw_params *params)
  95  {
  96 @@ -255,6 +317,29 @@ static struct snd_rpi_simple_drvdata drv
  97         .fixed_bclk_ratio = 64,
  98  };
  99
 100 +SND_SOC_DAILINK_DEFS(pifi_mini_210,
 101 +       DAILINK_COMP_ARRAY(COMP_EMPTY()),
 102 +       DAILINK_COMP_ARRAY(COMP_CODEC("tas571x.1-001a", "tas571x-hifi")),
 103 +       DAILINK_COMP_ARRAY(COMP_EMPTY()));
 104 +
 105 +static struct snd_soc_dai_link snd_pifi_mini_210_dai[] = {
 106 +       {
 107 +               .name           = "PiFi Mini 210",
 108 +               .stream_name    = "PiFi Mini 210 HiFi",
 109 +               .init                   = pifi_mini_210_init,
 110 +               .dai_fmt        = SND_SOC_DAIFMT_I2S |
 111 +                                       SND_SOC_DAIFMT_NB_NF |
 112 +                                       SND_SOC_DAIFMT_CBS_CFS,
 113 +               SND_SOC_DAILINK_REG(pifi_mini_210),
 114 +       },
 115 +};
 116 +
 117 +static struct snd_rpi_simple_drvdata drvdata_pifi_mini_210 = {
 118 +       .card_name        = "snd_pifi_mini_210",
 119 +       .dai              = snd_pifi_mini_210_dai,
 120 +       .fixed_bclk_ratio = 64,
 121 +};
 122 +
 123  static const struct of_device_id snd_rpi_simple_of_match[] = {
 124         { .compatible = "adi,adau1977-adc",
 125                 .data = (void *) &drvdata_adau1977 },
 126 @@ -269,16 +354,11 @@ static const struct of_device_id snd_rpi
 127         { .compatible = "rpi,rpi-dac", &drvdata_rpi_dac},
 128         { .compatible = "merus,merus-amp",
 129                 .data = (void *) &drvdata_merus_amp },
 130 +       { .compatible = "pifi,pifi-mini-210",
 131 +               .data = (void *) &drvdata_pifi_mini_210 },
 132         {},
 133  };
 134
 135 -static struct snd_soc_card snd_rpi_simple = {
 136 -       .driver_name  = "RPi-simple",
 137 -       .owner        = THIS_MODULE,
 138 -       .dai_link     = NULL,
 139 -       .num_links    = 1, /* Only a single DAI supported at the moment */
 140 -};
 141 -
 142  static int snd_rpi_simple_probe(struct platform_device *pdev)
 143  {
 144         int ret = 0;