mirror of
https://github.com/AsahiLinux/u-boot
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7a6c6dba28
Add a sound driver for tegra devices. This connects the audio hub, I2S controller and audio codec to allow sound output. Signed-off-by: Simon Glass <sjg@chromium.org> Signed-off-by: Tom Warren <twarren@nvidia.com>
100 lines
2.4 KiB
C
100 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2018 Google, LLC
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* Written by Simon Glass <sjg@chromium.org>
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*/
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#define LOG_CATEGORY UCLASS_I2S
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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 <misc.h>
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#include <sound.h>
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#include <asm/gpio.h>
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#include "tegra_i2s_priv.h"
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static int tegra_sound_setup(struct udevice *dev)
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{
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struct sound_uc_priv *uc_priv = dev_get_uclass_priv(dev);
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struct i2s_uc_priv *i2c_priv = dev_get_uclass_priv(uc_priv->i2s);
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int ret;
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if (uc_priv->setup_done)
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return -EALREADY;
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ret = audio_codec_set_params(uc_priv->codec, i2c_priv->id,
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i2c_priv->samplingrate,
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i2c_priv->samplingrate * i2c_priv->rfs,
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i2c_priv->bitspersample,
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i2c_priv->channels);
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if (ret)
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return ret;
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uc_priv->setup_done = true;
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return 0;
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}
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static int tegra_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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return i2s_tx_data(uc_priv->i2s, data, data_size);
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}
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static int tegra_sound_probe(struct udevice *dev)
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{
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struct sound_uc_priv *uc_priv = dev_get_uclass_priv(dev);
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struct gpio_desc en_gpio;
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struct udevice *ahub;
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int ret;
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ret = gpio_request_by_name(dev, "codec-enable-gpio", 0, &en_gpio,
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GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE);
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ret = uclass_get_device_by_phandle(UCLASS_AUDIO_CODEC, dev,
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"nvidia,audio-codec",
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&uc_priv->codec);
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if (ret) {
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log_debug("Failed to probe audio codec\n");
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return ret;
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}
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ret = uclass_get_device_by_phandle(UCLASS_I2S, dev,
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"nvidia,i2s-controller",
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&uc_priv->i2s);
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if (ret) {
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log_debug("Cannot find i2s: %d\n", ret);
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return ret;
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}
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/* Set up the audio hub, telling it the currect i2s to use */
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ahub = dev_get_parent(uc_priv->i2s);
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ret = misc_ioctl(ahub, AHUB_MISCOP_SET_I2S, &uc_priv->i2s);
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if (ret) {
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log_debug("Cannot set i2c: %d\n", ret);
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return ret;
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}
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log_debug("Probed sound '%s' with codec '%s' and i2s '%s'\n", dev->name,
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uc_priv->codec->name, uc_priv->i2s->name);
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return 0;
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}
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static const struct sound_ops tegra_sound_ops = {
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.setup = tegra_sound_setup,
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.play = tegra_sound_play,
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};
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static const struct udevice_id tegra_sound_ids[] = {
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{ .compatible = "nvidia,tegra-audio-max98090-nyan-big" },
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{ }
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};
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U_BOOT_DRIVER(tegra_sound) = {
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.name = "tegra_sound",
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.id = UCLASS_SOUND,
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.of_match = tegra_sound_ids,
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.probe = tegra_sound_probe,
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.ops = &tegra_sound_ops,
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};
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