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sound: tegra: Add a sound driver

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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>
This commit is contained in:
Simon Glass 2019-04-01 13:38:41 -07:00 committed by Tom Warren
parent c5a120b3f0
commit 7a6c6dba28
2 changed files with 101 additions and 1 deletions
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2
drivers/sound/Makefile
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@ -11,7 +11,7 @@ obj-$(CONFIG_I2S_SAMSUNG) += samsung-i2s.o
obj-$(CONFIG_SOUND_SANDBOX) += sandbox.o
obj-$(CONFIG_I2S_ROCKCHIP) += rockchip_i2s.o rockchip_sound.o
obj-$(CONFIG_I2S_SAMSUNG) += samsung_sound.o
obj-$(CONFIG_I2S_TEGRA) += tegra_ahub.o tegra_i2s.o
obj-$(CONFIG_I2S_TEGRA) += tegra_ahub.o tegra_i2s.o tegra_sound.o
obj-$(CONFIG_SOUND_WM8994) += wm8994.o
obj-$(CONFIG_SOUND_MAX98088) += max98088.o maxim_codec.o
obj-$(CONFIG_SOUND_MAX98090) += max98090.o maxim_codec.o

100
drivers/sound/tegra_sound.c Normal file
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@ -0,0 +1,100 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2018 Google, LLC
* Written by Simon Glass <sjg@chromium.org>
*/
#define LOG_CATEGORY UCLASS_I2S
#include <common.h>
#include <audio_codec.h>
#include <dm.h>
#include <i2s.h>
#include <misc.h>
#include <sound.h>
#include <asm/gpio.h>
#include "tegra_i2s_priv.h"
static int tegra_sound_setup(struct udevice *dev)
{
struct sound_uc_priv *uc_priv = dev_get_uclass_priv(dev);
struct i2s_uc_priv *i2c_priv = dev_get_uclass_priv(uc_priv->i2s);
int ret;
if (uc_priv->setup_done)
return -EALREADY;
ret = audio_codec_set_params(uc_priv->codec, i2c_priv->id,
i2c_priv->samplingrate,
i2c_priv->samplingrate * i2c_priv->rfs,
i2c_priv->bitspersample,
i2c_priv->channels);
if (ret)
return ret;
uc_priv->setup_done = true;
return 0;
}
static int tegra_sound_play(struct udevice *dev, void *data, uint data_size)
{
struct sound_uc_priv *uc_priv = dev_get_uclass_priv(dev);
return i2s_tx_data(uc_priv->i2s, data, data_size);
}
static int tegra_sound_probe(struct udevice *dev)
{
struct sound_uc_priv *uc_priv = dev_get_uclass_priv(dev);
struct gpio_desc en_gpio;
struct udevice *ahub;
int ret;
ret = gpio_request_by_name(dev, "codec-enable-gpio", 0, &en_gpio,
GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE);
ret = uclass_get_device_by_phandle(UCLASS_AUDIO_CODEC, dev,
"nvidia,audio-codec",
&uc_priv->codec);
if (ret) {
log_debug("Failed to probe audio codec\n");
return ret;
}
ret = uclass_get_device_by_phandle(UCLASS_I2S, dev,
"nvidia,i2s-controller",
&uc_priv->i2s);
if (ret) {
log_debug("Cannot find i2s: %d\n", ret);
return ret;
}
/* Set up the audio hub, telling it the currect i2s to use */
ahub = dev_get_parent(uc_priv->i2s);
ret = misc_ioctl(ahub, AHUB_MISCOP_SET_I2S, &uc_priv->i2s);
if (ret) {
log_debug("Cannot set i2c: %d\n", ret);
return ret;
}
log_debug("Probed sound '%s' with codec '%s' and i2s '%s'\n", dev->name,
uc_priv->codec->name, uc_priv->i2s->name);
return 0;
}
static const struct sound_ops tegra_sound_ops = {
.setup = tegra_sound_setup,
.play = tegra_sound_play,
};
static const struct udevice_id tegra_sound_ids[] = {
{ .compatible = "nvidia,tegra-audio-max98090-nyan-big" },
{ }
};
U_BOOT_DRIVER(tegra_sound) = {
.name = "tegra_sound",
.id = UCLASS_SOUND,
.of_match = tegra_sound_ids,
.probe = tegra_sound_probe,
.ops = &tegra_sound_ops,
};