GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)
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// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) 2013 Google, Inc
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*/
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#define LOG_CATEGORY UCLASS_SOUND
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#include <common.h>
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#include <audio_codec.h>
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#include <dm.h>
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#include <i2s.h>
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#include <sound.h>
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#include <asm/sdl.h>
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struct sandbox_codec_priv {
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int interface;
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int rate;
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int mclk_freq;
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int bits_per_sample;
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uint channels;
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};
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struct sandbox_i2s_priv {
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int sum; /* Use to sum the provided audio data */
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bool silent; /* Sound is silent, don't use SDL */
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};
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struct sandbox_sound_priv {
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int setup_called;
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int sum; /* Use to sum the provided audio data */
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bool allow_beep; /* true to allow the start_beep() interface */
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int frequency_hz; /* Beep frequency if active, else 0 */
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};
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void sandbox_get_codec_params(struct udevice *dev, int *interfacep, int *ratep,
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int *mclk_freqp, int *bits_per_samplep,
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uint *channelsp)
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{
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struct sandbox_codec_priv *priv = dev_get_priv(dev);
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*interfacep = priv->interface;
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*ratep = priv->rate;
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*mclk_freqp = priv->mclk_freq;
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*bits_per_samplep = priv->bits_per_sample;
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*channelsp = priv->channels;
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}
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int sandbox_get_i2s_sum(struct udevice *dev)
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{
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struct sandbox_i2s_priv *priv = dev_get_priv(dev);
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return priv->sum;
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}
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int sandbox_get_setup_called(struct udevice *dev)
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{
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struct sandbox_sound_priv *priv = dev_get_priv(dev);
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return priv->setup_called;
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}
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int sandbox_get_sound_sum(struct udevice *dev)
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{
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struct sandbox_sound_priv *priv = dev_get_priv(dev);
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return priv->sum;
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}
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void sandbox_set_allow_beep(struct udevice *dev, bool allow)
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{
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struct sandbox_sound_priv *priv = dev_get_priv(dev);
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priv->allow_beep = allow;
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}
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int sandbox_get_beep_frequency(struct udevice *dev)
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{
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struct sandbox_sound_priv *priv = dev_get_priv(dev);
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return priv->frequency_hz;
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}
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static int sandbox_codec_set_params(struct udevice *dev, int interface,
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int rate, int mclk_freq,
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int bits_per_sample, uint channels)
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{
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struct sandbox_codec_priv *priv = dev_get_priv(dev);
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priv->interface = interface;
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priv->rate = rate;
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priv->mclk_freq = mclk_freq;
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priv->bits_per_sample = bits_per_sample;
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priv->channels = channels;
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return 0;
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}
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static int sandbox_i2s_tx_data(struct udevice *dev, void *data,
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uint data_size)
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{
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struct sandbox_i2s_priv *priv = dev_get_priv(dev);
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int i;
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for (i = 0; i < data_size; i++)
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priv->sum += ((uint8_t *)data)[i];
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if (!priv->silent) {
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int ret;
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ret = sandbox_sdl_sound_play(data, data_size);
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if (ret)
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return ret;
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}
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return 0;
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}
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static int sandbox_i2s_probe(struct udevice *dev)
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{
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struct i2s_uc_priv *uc_priv = dev_get_uclass_priv(dev);
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struct sandbox_i2s_priv *priv = dev_get_priv(dev);
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/* Use hard-coded values here */
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uc_priv->rfs = 256;
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uc_priv->bfs = 32;
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uc_priv->audio_pll_clk = 192000000;
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uc_priv->samplingrate = 48000;
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uc_priv->bitspersample = 16;
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uc_priv->channels = 2;
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uc_priv->id = 1;
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priv->silent = dev_read_bool(dev, "sandbox,silent");
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if (priv->silent) {
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log_warning("Sound is silenced\n");
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} else if (sandbox_sdl_sound_init(uc_priv->samplingrate,
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uc_priv->channels)) {
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/* Ignore any error here - we'll just have no sound */
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priv->silent = true;
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}
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return 0;
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}
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static int sandbox_sound_setup(struct udevice *dev)
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{
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struct sandbox_sound_priv *priv = dev_get_priv(dev);
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priv->setup_called++;
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return 0;
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}
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static int sandbox_sound_play(struct udevice *dev, void *data, uint data_size)
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{
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struct sound_uc_priv *uc_priv = dev_get_uclass_priv(dev);
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struct sandbox_sound_priv *priv = dev_get_priv(dev);
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int i;
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for (i = 0; i < data_size; i++)
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priv->sum += ((uint8_t *)data)[i];
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return i2s_tx_data(uc_priv->i2s, data, data_size);
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}
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int sandbox_sound_start_beep(struct udevice *dev, int frequency_hz)
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{
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struct sandbox_sound_priv *priv = dev_get_priv(dev);
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if (!priv->allow_beep)
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return -ENOSYS;
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priv->frequency_hz = frequency_hz;
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return 0;
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}
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int sandbox_sound_stop_beep(struct udevice *dev)
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{
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struct sandbox_sound_priv *priv = dev_get_priv(dev);
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if (!priv->allow_beep)
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return -ENOSYS;
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priv->frequency_hz = 0;
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return 0;
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}
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static int sandbox_sound_probe(struct udevice *dev)
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{
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return sound_find_codec_i2s(dev);
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}
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static const struct audio_codec_ops sandbox_codec_ops = {
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.set_params = sandbox_codec_set_params,
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};
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static const struct udevice_id sandbox_codec_ids[] = {
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{ .compatible = "sandbox,audio-codec" },
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{ }
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};
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U_BOOT_DRIVER(sandbox_codec) = {
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.name = "sandbox_codec",
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.id = UCLASS_AUDIO_CODEC,
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.of_match = sandbox_codec_ids,
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.ops = &sandbox_codec_ops,
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.priv_auto_alloc_size = sizeof(struct sandbox_codec_priv),
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};
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static const struct i2s_ops sandbox_i2s_ops = {
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.tx_data = sandbox_i2s_tx_data,
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};
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static const struct udevice_id sandbox_i2s_ids[] = {
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{ .compatible = "sandbox,i2s" },
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{ }
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};
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U_BOOT_DRIVER(sandbox_i2s) = {
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.name = "sandbox_i2s",
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.id = UCLASS_I2S,
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.of_match = sandbox_i2s_ids,
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.ops = &sandbox_i2s_ops,
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.probe = sandbox_i2s_probe,
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.priv_auto_alloc_size = sizeof(struct sandbox_i2s_priv),
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};
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static const struct sound_ops sandbox_sound_ops = {
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.setup = sandbox_sound_setup,
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.play = sandbox_sound_play,
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.start_beep = sandbox_sound_start_beep,
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.stop_beep = sandbox_sound_stop_beep,
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};
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static const struct udevice_id sandbox_sound_ids[] = {
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{ .compatible = "sandbox,sound" },
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{ }
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};
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U_BOOT_DRIVER(sandbox_sound) = {
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.name = "sandbox_sound",
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.id = UCLASS_SOUND,
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.of_match = sandbox_sound_ids,
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.ops = &sandbox_sound_ops,
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.priv_auto_alloc_size = sizeof(struct sandbox_sound_priv),
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.probe = sandbox_sound_probe,
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};
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