sound: Add uclass operations for beeping
Some audio codecs such as Intel HDA do not need to use digital data to
play sounds, but instead have a way to emit beeps. Add this interface as
an option. If the beep interface is not supported, then the sound uclass
falls back to the I2S interface.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/drivers/sound/sandbox.c b/drivers/sound/sandbox.c
index b0b07f3..6005231 100644
--- a/drivers/sound/sandbox.c
+++ b/drivers/sound/sandbox.c
@@ -24,7 +24,9 @@
struct sandbox_sound_priv {
int setup_called;
- int sum; /* Use to sum the provided audio data */
+ int sum; /* Use to sum the provided audio data */
+ bool allow_beep; /* true to allow the start_beep() interface */
+ int frequency_hz; /* Beep frequency if active, else 0 */
};
void sandbox_get_codec_params(struct udevice *dev, int *interfacep, int *ratep,
@@ -61,6 +63,20 @@
return priv->sum;
}
+void sandbox_set_allow_beep(struct udevice *dev, bool allow)
+{
+ struct sandbox_sound_priv *priv = dev_get_priv(dev);
+
+ priv->allow_beep = allow;
+}
+
+int sandbox_get_beep_frequency(struct udevice *dev)
+{
+ struct sandbox_sound_priv *priv = dev_get_priv(dev);
+
+ return priv->frequency_hz;
+}
+
static int sandbox_codec_set_params(struct udevice *dev, int interface,
int rate, int mclk_freq,
int bits_per_sample, uint channels)
@@ -128,6 +144,28 @@
return i2s_tx_data(uc_priv->i2s, data, data_size);
}
+int sandbox_sound_start_beep(struct udevice *dev, int frequency_hz)
+{
+ struct sandbox_sound_priv *priv = dev_get_priv(dev);
+
+ if (!priv->allow_beep)
+ return -ENOSYS;
+ priv->frequency_hz = frequency_hz;
+
+ return 0;
+}
+
+int sandbox_sound_stop_beep(struct udevice *dev)
+{
+ struct sandbox_sound_priv *priv = dev_get_priv(dev);
+
+ if (!priv->allow_beep)
+ return -ENOSYS;
+ priv->frequency_hz = 0;
+
+ return 0;
+}
+
static int sandbox_sound_probe(struct udevice *dev)
{
return sound_find_codec_i2s(dev);
@@ -169,8 +207,10 @@
};
static const struct sound_ops sandbox_sound_ops = {
- .setup = sandbox_sound_setup,
- .play = sandbox_sound_play,
+ .setup = sandbox_sound_setup,
+ .play = sandbox_sound_play,
+ .start_beep = sandbox_sound_start_beep,
+ .stop_beep = sandbox_sound_stop_beep,
};
static const struct udevice_id sandbox_sound_ids[] = {