ASoC: spdif_receiver: Add support for spdif in Audio Codec

This patch adds the support for spdif in audio codec.

Signed-off-by: vipin Kumar <vipin.kumar@st.com>
Signed-off-by: Rajeev Kumar <rajeev-dlh.kumar@st.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

2 files changed, 68 insertions, 1 deletions

diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile
index d35ba7f06fcf..62c3d4dd1872 100644
--- a/sound/soc/codecs/Makefile
+++ b/sound/soc/codecs/Makefile
@@ -45,7 +45,7 @@ snd-soc-alc5623-objs := alc5623.o
 snd-soc-alc5632-objs := alc5632.o
 snd-soc-sigmadsp-objs := sigmadsp.o
 snd-soc-sn95031-objs := sn95031.o
-snd-soc-spdif-objs := spdif_transciever.o
+snd-soc-spdif-objs := spdif_transciever.o spdif_receiver.o
 snd-soc-ssm2602-objs := ssm2602.o
 snd-soc-sta32x-objs := sta32x.o
 snd-soc-stac9766-objs := stac9766.o
diff --git a/sound/soc/codecs/spdif_receiver.c b/sound/soc/codecs/spdif_receiver.c
new file mode 100644
index 000000000000..dd8d856053fc
--- /dev/null
+++ b/sound/soc/codecs/spdif_receiver.c
@@ -0,0 +1,67 @@
+/*
+ * ALSA SoC SPDIF DIR (Digital Interface Reciever) driver
+ *
+ * Based on ALSA SoC SPDIF DIT driver
+ *
+ *  This driver is used by controllers which can operate in DIR (SPDI/F) where
+ *  no codec is needed.  This file provides stub codec that can be used
+ *  in these configurations. SPEAr SPDIF IN Audio controller uses this driver.
+ *
+ * Author:      Vipin Kumar,  <vipin.kumar@st.com>
+ * Copyright:   (C) 2012  ST Microelectronics
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/slab.h>
+#include <sound/soc.h>
+#include <sound/pcm.h>
+#include <sound/initval.h>
+
+#define STUB_RATES      SNDRV_PCM_RATE_8000_192000
+#define STUB_FORMATS    (SNDRV_PCM_FMTBIT_S16_LE | \
+                        SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE)
+
+static struct snd_soc_codec_driver soc_codec_spdif_dir;
+
+static struct snd_soc_dai_driver dir_stub_dai = {
+        .name           = "dir-hifi",
+        .capture        = {
+                .stream_name    = "Capture",
+                .channels_min   = 1,
+                .channels_max   = 384,
+                .rates          = STUB_RATES,
+                .formats        = STUB_FORMATS,
+        },
+};
+
+static int spdif_dir_probe(struct platform_device *pdev)
+{
+        return snd_soc_register_codec(&pdev->dev, &soc_codec_spdif_dir,
+                        &dir_stub_dai, 1);
+}
+
+static int spdif_dir_remove(struct platform_device *pdev)
+{
+        snd_soc_unregister_codec(&pdev->dev);
+        return 0;
+}
+
+static struct platform_driver spdif_dir_driver = {
+        .probe          = spdif_dir_probe,
+        .remove         = spdif_dir_remove,
+        .driver         = {
+                .name   = "spdif-dir",
+                .owner  = THIS_MODULE,
+        },
+};
+
+module_platform_driver(spdif_dir_driver);
+
+MODULE_DESCRIPTION("ASoC SPDIF DIR driver");
+MODULE_AUTHOR("Vipin Kumar <vipin.kumar@st.com>");
+MODULE_LICENSE("GPL");