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_start_beep(struct udevice *dev, int frequency_hz)
  35 {
  36         struct sound_ops *ops = sound_get_ops(dev);
  37
  38         if (!ops->start_beep)
  39                 return -ENOSYS;
  40
  41         return ops->start_beep(dev, frequency_hz);
  42 }
  43
  44 int sound_stop_beep(struct udevice *dev)
  45 {
  46         struct sound_ops *ops = sound_get_ops(dev);
  47
  48         if (!ops->stop_beep)
  49                 return -ENOSYS;
  50
  51         return ops->stop_beep(dev);
  52 }
  53
  54 int sound_beep(struct udevice *dev, int msecs, int frequency_hz)
  55 {
  56         struct sound_uc_priv *uc_priv = dev_get_uclass_priv(dev);
  57         struct i2s_uc_priv *i2s_uc_priv;
  58         unsigned short *data;
  59         uint data_size;
  60         int ret;
  61
  62         ret = sound_setup(dev);
  63         if (ret && ret != -EALREADY)
  64                 return ret;
  65
  66         /* Try using the beep interface if available */
  67         ret = sound_start_beep(dev, frequency_hz);
  68         if (ret != -ENOSYS) {
  69                 if (ret)
  70                         return ret;
  71                 mdelay(msecs);
  72                 ret = sound_stop_beep(dev);
  73
  74                 return ret;
  75         }
  76
  77         /* Buffer length computation */
  78         i2s_uc_priv = dev_get_uclass_priv(uc_priv->i2s);
  79         data_size = i2s_uc_priv->samplingrate * i2s_uc_priv->channels;
  80         data_size *= (i2s_uc_priv->bitspersample / SOUND_BITS_IN_BYTE);
  81         data = malloc(data_size);
  82         if (!data) {
  83                 debug("%s: malloc failed\n", __func__);
  84                 return -ENOMEM;
  85         }
  86
  87         sound_create_square_wave(i2s_uc_priv->samplingrate, data, data_size,
  88                                  frequency_hz, i2s_uc_priv->channels);
  89
  90         while (msecs >= 1000) {
  91                 ret = sound_play(dev, data, data_size);
  92                 msecs -= 1000;
  93         }
  94         if (msecs) {
  95                 unsigned long size =
  96                         (data_size * msecs) / (sizeof(int) * 1000);
  97
  98                 ret = sound_play(dev, data, size);
  99         }
 100
 101         free(data);
 102
 103         return ret;
 104 }
 105
 106 int sound_find_codec_i2s(struct udevice *dev)
 107 {
 108         struct sound_uc_priv *uc_priv = dev_get_uclass_priv(dev);
 109         struct ofnode_phandle_args args;
 110         ofnode node;
 111         int ret;
 112
 113         /* First the codec */
 114         node = ofnode_find_subnode(dev_ofnode(dev), "codec");
 115         if (!ofnode_valid(node)) {
 116                 debug("Failed to find /cpu subnode\n");
 117                 return -EINVAL;
 118         }
 119         ret = ofnode_parse_phandle_with_args(node, "sound-dai",
 120                                              "#sound-dai-cells", 0, 0, &args);
 121         if (ret) {
 122                 debug("Cannot find phandle: %d\n", ret);
 123                 return ret;
 124         }
 125         ret = uclass_get_device_by_ofnode(UCLASS_AUDIO_CODEC, args.node,
 126                                           &uc_priv->codec);
 127         if (ret) {
 128                 debug("Cannot find codec: %d\n", ret);
 129                 return ret;
 130         }
 131
 132         /* Now the i2s */
 133         node = ofnode_find_subnode(dev_ofnode(dev), "cpu");
 134         if (!ofnode_valid(node)) {
 135                 debug("Failed to find /cpu subnode\n");
 136                 return -EINVAL;
 137         }
 138         ret = ofnode_parse_phandle_with_args(node, "sound-dai",
 139                                              "#sound-dai-cells", 0, 0, &args);
 140         if (ret) {
 141                 debug("Cannot find phandle: %d\n", ret);
 142                 return ret;
 143         }
 144         ret = uclass_get_device_by_ofnode(UCLASS_I2S, args.node, &uc_priv->i2s);
 145         if (ret) {
 146                 debug("Cannot find i2s: %d\n", ret);
 147                 return ret;
 148         }
 149         debug("Probed sound '%s' with codec '%s' and i2s '%s'\n", dev->name,
 150               uc_priv->codec->name, uc_priv->i2s->name);
 151
 152         return 0;
 153 }
 154
 155 UCLASS_DRIVER(sound) = {
 156         .id             = UCLASS_SOUND,
 157         .name           = "sound",
 158         .per_device_auto_alloc_size     = sizeof(struct sound_uc_priv),
 159 };