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 ---
drivers/sound/Makefile | 2 +- drivers/sound/tegra_sound.c | 100 ++++++++++++++++++++++++++++++++++++ 2 files changed, 101 insertions(+), 1 deletion(-) create mode 100644 drivers/sound/tegra_sound.c
diff --git a/drivers/sound/Makefile b/drivers/sound/Makefile index d444c28578a..6925f0b6ec2 100644 --- a/drivers/sound/Makefile +++ b/drivers/sound/Makefile @@ -10,7 +10,7 @@ obj-$(CONFIG_SOUND) += sound-uclass.o obj-$(CONFIG_I2S_SAMSUNG) += samsung-i2s.o obj-$(CONFIG_SOUND_SANDBOX) += sandbox.o obj-$(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 diff --git a/drivers/sound/tegra_sound.c b/drivers/sound/tegra_sound.c new file mode 100644 index 00000000000..7c2ed53f5a7 --- /dev/null +++ b/drivers/sound/tegra_sound.c @@ -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, +};