dm: sound: Create a uclass for audio codecs

An audio codec provides a way to convert digital data to sound and vice
versa. Add a simple uclass which just supports setting the parameters for
the codec.

Signed-off-by: Simon Glass <sjg@chromium.org>

3 files changed, 82 insertions, 0 deletions

diff --git a/drivers/sound/Makefile b/drivers/sound/Makefile
index 696c5aecbe..ae5fabed84 100644
--- a/drivers/sound/Makefile
+++ b/drivers/sound/Makefile
@@ -4,6 +4,7 @@
 # R. Chandrasekar <rcsekar@samsung.com>
 
 obj-$(CONFIG_SOUND)	+= sound.o
+obj-$(CONFIG_DM_SOUND)	+= codec-uclass.o
 obj-$(CONFIG_I2S)	+= sound-i2s.o
 obj-$(CONFIG_I2S_SAMSUNG)	+= samsung-i2s.o
 obj-$(CONFIG_SOUND_SANDBOX)	+= sandbox.o
diff --git a/drivers/sound/codec-uclass.c b/drivers/sound/codec-uclass.c
new file mode 100644
index 0000000000..1ec77acfc1
--- /dev/null
+++ b/drivers/sound/codec-uclass.c
@@ -0,0 +1,26 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2018 Google LLC
+ * Written by Simon Glass <sjg@chromium.org>
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <audio_codec.h>
+
+int audio_codec_set_params(struct udevice *dev, int interface, int rate,
+			   int mclk_freq, int bits_per_sample, uint channels)
+{
+	struct audio_codec_ops *ops = audio_codec_get_ops(dev);
+
+	if (!ops->set_params)
+		return -ENOSYS;
+
+	return ops->set_params(dev, interface, rate, mclk_freq, bits_per_sample,
+			       channels);
+}
+
+UCLASS_DRIVER(audio_codec) = {
+	.id		= UCLASS_AUDIO_CODEC,
+	.name		= "audio-codec",
+};
diff --git a/drivers/sound/sandbox.c b/drivers/sound/sandbox.c
index 94eff54282..d24eb9ae9c 100644
--- a/drivers/sound/sandbox.c
+++ b/drivers/sound/sandbox.c
@@ -4,9 +4,19 @@
  */
 
 #include <common.h>
+#include <dm.h>
+#include <audio_codec.h>
 #include <asm/sound.h>
 #include <asm/sdl.h>
 
+struct sandbox_codec_priv {
+	int interface;
+	int rate;
+	int mclk_freq;
+	int bits_per_sample;
+	uint channels;
+};
+
 int sound_play(uint32_t msec, uint32_t frequency)
 {
 	sandbox_sdl_sound_start(frequency);
@@ -20,3 +30,48 @@ int sound_init(const void *blob)
 {
 	return sandbox_sdl_sound_init();
 }
+
+void sandbox_get_codec_params(struct udevice *dev, int *interfacep, int *ratep,
+			      int *mclk_freqp, int *bits_per_samplep,
+			      uint *channelsp)
+{
+	struct sandbox_codec_priv *priv = dev_get_priv(dev);
+
+	*interfacep = priv->interface;
+	*ratep = priv->rate;
+	*mclk_freqp = priv->mclk_freq;
+	*bits_per_samplep = priv->bits_per_sample;
+	*channelsp = priv->channels;
+}
+
+static int sandbox_codec_set_params(struct udevice *dev, int interface,
+				    int rate, int mclk_freq,
+				    int bits_per_sample, uint channels)
+{
+	struct sandbox_codec_priv *priv = dev_get_priv(dev);
+
+	priv->interface = interface;
+	priv->rate = rate;
+	priv->mclk_freq = mclk_freq;
+	priv->bits_per_sample = bits_per_sample;
+	priv->channels = channels;
+
+	return 0;
+}
+
+static const struct audio_codec_ops sandbox_codec_ops = {
+	.set_params	= sandbox_codec_set_params,
+};
+
+static const struct udevice_id sandbox_codec_ids[] = {
+	{ .compatible = "sandbox,audio-codec" },
+	{ }
+};
+
+U_BOOT_DRIVER(sandbox_codec) = {
+	.name		= "sandbox_codec",
+	.id		= UCLASS_AUDIO_CODEC,
+	.of_match	= sandbox_codec_ids,
+	.ops		= &sandbox_codec_ops,
+	.priv_auto_alloc_size	= sizeof(struct sandbox_codec_priv),
+};