sound: tegra: Add a sound driver

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>

diff --git a/drivers/sound/Makefile b/drivers/sound/Makefile
index 358d5f920b2423bee6a8245f97e8ae10ba9112dd..73ed7fe53c3115c28d84fe0bf5069f8b2670441f 100644 (file)
--- a/drivers/sound/Makefile
+++ b/drivers/sound/Makefile
@@ -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

diff --git a/drivers/sound/tegra_sound.c b/drivers/sound/tegra_sound.c
new file mode 100644 (file)
index 0000000..7c2ed53
--- /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,
+};