drivers/sound/sound-uclass.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright 2018 Google LLC
   4  * Written by Simon Glass <sjg@chromium.org>
   5  */
   6
   7 #include <common.h>
   8 #include <dm.h>
   9 #include <i2s.h>
  10 #include <sound.h>
  11
  12 #define SOUND_BITS_IN_BYTE 8
  13
  14 int sound_setup(struct udevice *dev)
  15 {
  16         struct sound_ops *ops = sound_get_ops(dev);
  17
  18         if (!ops->setup)
  19                 return 0;
  20
  21         return ops->setup(dev);
  22 }
  23
  24 int sound_play(struct udevice *dev, void *data, uint data_size)
  25 {
  26         struct sound_ops *ops = sound_get_ops(dev);
  27
  28         if (!ops->play)
  29                 return -ENOSYS;
  30
  31         return ops->play(dev, data, data_size);
  32 }
  33
  34 int sound_stop_play(struct udevice *dev)
  35 {
  36         struct sound_ops *ops = sound_get_ops(dev);
  37
  38         if (!ops->play)
  39                 return -ENOSYS;
  40
  41         return ops->stop_play(dev);
  42 }
  43
  44 int sound_start_beep(struct udevice *dev, int frequency_hz)
  45 {
  46         struct sound_ops *ops = sound_get_ops(dev);
  47
  48         if (!ops->start_beep)
  49                 return -ENOSYS;
  50
  51         return ops->start_beep(dev, frequency_hz);
  52 }
  53
  54 int sound_stop_beep(struct udevice *dev)
  55 {
  56         struct sound_ops *ops = sound_get_ops(dev);
  57
  58         if (!ops->stop_beep)
  59                 return -ENOSYS;
  60
  61         return ops->stop_beep(dev);
  62 }
  63
  64 int sound_beep(struct udevice *dev, int msecs, int frequency_hz)
  65 {
  66         struct sound_uc_priv *uc_priv = dev_get_uclass_priv(dev);
  67         struct i2s_uc_priv *i2s_uc_priv;
  68         unsigned short *data;
  69         uint data_size;
  70         int ret;
  71
  72         ret = sound_setup(dev);
  73         if (ret && ret != -EALREADY)
  74                 return ret;
  75
  76         /* Try using the beep interface if available */
  77         ret = sound_start_beep(dev, frequency_hz);
  78         if (ret != -ENOSYS) {
  79                 if (ret)
  80                         return ret;
  81                 mdelay(msecs);
  82                 ret = sound_stop_beep(dev);
  83
  84                 return ret;
  85         }
  86
  87         /* Buffer length computation */
  88         i2s_uc_priv = dev_get_uclass_priv(uc_priv->i2s);
  89         data_size = i2s_uc_priv->samplingrate * i2s_uc_priv->channels;
  90         data_size *= (i2s_uc_priv->bitspersample / SOUND_BITS_IN_BYTE);
  91         data = malloc(data_size);
  92         if (!data) {
  93                 debug("%s: malloc failed\n", __func__);
  94                 return -ENOMEM;
  95         }
  96
  97         sound_create_square_wave(i2s_uc_priv->samplingrate, data, data_size,
  98                                  frequency_hz, i2s_uc_priv->channels);
  99
 100         while (msecs >= 1000) {
 101                 ret = sound_play(dev, data, data_size);
 102                 msecs -= 1000;
 103         }
 104         if (msecs) {
 105                 unsigned long size =
 106                         (data_size * msecs) / (sizeof(int) * 1000);
 107
 108                 ret = sound_play(dev, data, size);
 109         }
 110         sound_stop_play(dev);
 111
 112         free(data);
 113
 114         return ret;
 115 }
 116
 117 int sound_find_codec_i2s(struct udevice *dev)
 118 {
 119         struct sound_uc_priv *uc_priv = dev_get_uclass_priv(dev);
 120         struct ofnode_phandle_args args;
 121         ofnode node;
 122         int ret;
 123
 124         /* First the codec */
 125         node = ofnode_find_subnode(dev_ofnode(dev), "codec");
 126         if (!ofnode_valid(node)) {
 127                 debug("Failed to find /cpu subnode\n");
 128                 return -EINVAL;
 129         }
 130         ret = ofnode_parse_phandle_with_args(node, "sound-dai",
 131                                              "#sound-dai-cells", 0, 0, &args);
 132         if (ret) {
 133                 debug("Cannot find phandle: %d\n", ret);
 134                 return ret;
 135         }
 136         ret = uclass_get_device_by_ofnode(UCLASS_AUDIO_CODEC, args.node,
 137                                           &uc_priv->codec);
 138         if (ret) {
 139                 debug("Cannot find codec: %d\n", ret);
 140                 return ret;
 141         }
 142
 143         /* Now the i2s */
 144         node = ofnode_find_subnode(dev_ofnode(dev), "cpu");
 145         if (!ofnode_valid(node)) {
 146                 debug("Failed to find /cpu subnode\n");
 147                 return -EINVAL;
 148         }
 149         ret = ofnode_parse_phandle_with_args(node, "sound-dai",
 150                                              "#sound-dai-cells", 0, 0, &args);
 151         if (ret) {
 152                 debug("Cannot find phandle: %d\n", ret);
 153                 return ret;
 154         }
 155         ret = uclass_get_device_by_ofnode(UCLASS_I2S, args.node, &uc_priv->i2s);
 156         if (ret) {
 157                 debug("Cannot find i2s: %d\n", ret);
 158                 return ret;
 159         }
 160         debug("Probed sound '%s' with codec '%s' and i2s '%s'\n", dev->name,
 161               uc_priv->codec->name, uc_priv->i2s->name);
 162
 163         return 0;
 164 }
 165
 166 UCLASS_DRIVER(sound) = {
 167         .id             = UCLASS_SOUND,
 168         .name           = "sound",
 169         .per_device_auto_alloc_size     = sizeof(struct sound_uc_priv),
 170 };