Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / sound / soc / codecs / spdif_receiver.c

diff --git a/kernel/sound/soc/codecs/spdif_receiver.c b/kernel/sound/soc/codecs/spdif_receiver.c
new file mode 100644 (file)
index 0000000..3ec41cc
--- /dev/null
+++ b/kernel/sound/soc/codecs/spdif_receiver.c
@@ -0,0 +1,91 @@
+/*
+ * 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>
+#include <linux/of.h>
+
+static const struct snd_soc_dapm_widget dir_widgets[] = {
+       SND_SOC_DAPM_INPUT("spdif-in"),
+};
+
+static const struct snd_soc_dapm_route dir_routes[] = {
+       { "Capture", NULL, "spdif-in" },
+};
+
+#define STUB_RATES     SNDRV_PCM_RATE_8000_192000
+#define STUB_FORMATS   (SNDRV_PCM_FMTBIT_S16_LE | \
+                       SNDRV_PCM_FMTBIT_S20_3LE | \
+                       SNDRV_PCM_FMTBIT_S24_LE | \
+                       SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE)
+
+static struct snd_soc_codec_driver soc_codec_spdif_dir = {
+       .dapm_widgets = dir_widgets,
+       .num_dapm_widgets = ARRAY_SIZE(dir_widgets),
+       .dapm_routes = dir_routes,
+       .num_dapm_routes = ARRAY_SIZE(dir_routes),
+};
+
+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;
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id spdif_dir_dt_ids[] = {
+       { .compatible = "linux,spdif-dir", },
+       { }
+};
+MODULE_DEVICE_TABLE(of, spdif_dir_dt_ids);
+#endif
+
+static struct platform_driver spdif_dir_driver = {
+       .probe          = spdif_dir_probe,
+       .remove         = spdif_dir_remove,
+       .driver         = {
+               .name   = "spdif-dir",
+               .of_match_table = of_match_ptr(spdif_dir_dt_ids),
+       },
+};
+
+module_platform_driver(spdif_dir_driver);
+
+MODULE_DESCRIPTION("ASoC SPDIF DIR driver");
+MODULE_AUTHOR("Vipin Kumar <vipin.kumar@st.com>");
+MODULE_LICENSE("GPL");