diff options
| author | Simon Glass | 2019-02-16 20:24:54 -0700 |
|---|---|---|
| committer | Bin Meng | 2019-02-20 15:27:08 +0800 |
| commit | 2850266965ade165f913a66f679a0449faf21180 (patch) | |
| tree | f173b23f448ab8db19adaf8ee75228baf281a42b /drivers/sound/sandbox.c | |
| parent | e65f9ef9f21058a7e4f54e11da1af49a8c1b0579 (diff) | |
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>
Diffstat (limited to 'drivers/sound/sandbox.c')
| -rw-r--r-- | drivers/sound/sandbox.c | 46 |
1 files changed, 43 insertions, 3 deletions
diff --git a/drivers/sound/sandbox.c b/drivers/sound/sandbox.c index b0b07f3239b..600523160f0 100644 --- a/drivers/sound/sandbox.c +++ b/drivers/sound/sandbox.c @@ -24,7 +24,9 @@ struct sandbox_i2s_priv { 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 @@ int sandbox_get_sound_sum(struct udevice *dev) 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 @@ static int sandbox_sound_play(struct udevice *dev, void *data, uint data_size) 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 @@ U_BOOT_DRIVER(sandbox_i2s) = { }; 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[] = { |