drivers/sound/broadwell_sound.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Sound for broadwell
   4  *
   5  * Copyright 2019 Google LLC
   6  * Written by Simon Glass <sjg@chromium.org>
   7  */
   8
   9 #define LOG_CATEGORY UCLASS_SOUND
  10
  11 #include <common.h>
  12 #include <audio_codec.h>
  13 #include <dm.h>
  14 #include <i2s.h>
  15 #include <sound.h>
  16
  17 static int broadwell_sound_probe(struct udevice *dev)
  18 {
  19         return sound_find_codec_i2s(dev);
  20 }
  21
  22 static int broadwell_sound_setup(struct udevice *dev)
  23 {
  24         struct sound_uc_priv *uc_priv = dev_get_uclass_priv(dev);
  25         struct i2s_uc_priv *i2c_priv = dev_get_uclass_priv(uc_priv->i2s);
  26         int ret;
  27
  28         if (uc_priv->setup_done)
  29                 return -EALREADY;
  30         ret = audio_codec_set_params(uc_priv->codec, i2c_priv->id,
  31                                      i2c_priv->samplingrate,
  32                                      i2c_priv->samplingrate * i2c_priv->rfs,
  33                                      i2c_priv->bitspersample,
  34                                      i2c_priv->channels);
  35         if (ret)
  36                 return ret;
  37         uc_priv->setup_done = true;
  38
  39         return 0;
  40 }
  41
  42 static int broadwell_sound_play(struct udevice *dev, void *data, uint data_size)
  43 {
  44         struct sound_uc_priv *uc_priv = dev_get_uclass_priv(dev);
  45
  46         return i2s_tx_data(uc_priv->i2s, data, data_size);
  47 }
  48
  49 static const struct sound_ops broadwell_sound_ops = {
  50         .setup          = broadwell_sound_setup,
  51         .play           = broadwell_sound_play,
  52 };
  53
  54 static const struct udevice_id broadwell_sound_ids[] = {
  55         { .compatible = "google,samus-sound" },
  56         { }
  57 };
  58
  59 U_BOOT_DRIVER(broadwell_sound_drv) = {
  60         .name           = "broadwell_sound",
  61         .id             = UCLASS_SOUND,
  62         .of_match       = broadwell_sound_ids,
  63         .probe          = broadwell_sound_probe,
  64         .ops            = &broadwell_sound_ops,
  65 };