[alsa-devel] [PATCH v2 4/6] ARM: DaVinci: ASoC: Add dummy codec support
Naresh Medisetty
naresh at ti.com
Fri Apr 17 00:44:54 CEST 2009
From: Naresh.Medisetty <naresh at ti.com>
McASP on DM646x can operate in DIT (S/PDIF) where no codec is needed.
This patch provides stub codec that can be used in these configurations.
On DM646x EVM the McASP1 is connected to the S/PDIF out.
Signed-off-by: Steve Chen <schen at mvista.com>
Signed-off-by: Pavel Kiryukhin <pkiryukhin at ru.mvista.com>
Signed-off-by: Naresh Medisetty <naresh at ti.com>
---
This patch applies against ALSA mainline - that's the topic/asoc
branch of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6.git
sound/soc/codecs/Kconfig | 3 +
sound/soc/codecs/Makefile | 2 +
sound/soc/codecs/spdif_transciever.c | 69 ++++++++++++++++++++++++++++++++++
sound/soc/codecs/spdif_transciever.h | 17 ++++++++
sound/soc/davinci/Kconfig | 1 +
5 files changed, 92 insertions(+), 0 deletions(-)
create mode 100644 sound/soc/codecs/spdif_transciever.c
create mode 100644 sound/soc/codecs/spdif_transciever.h
diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index 121d63f..154c64c 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -22,6 +22,7 @@ config SND_SOC_ALL_CODECS
select SND_SOC_TLV320AIC23 if I2C
select SND_SOC_TLV320AIC26 if SPI_MASTER
select SND_SOC_TLV320AIC3X if I2C
+ select SND_SOC_SPDIF
select SND_SOC_TWL4030 if TWL4030_CORE
select SND_SOC_UDA134X
select SND_SOC_UDA1380 if I2C
@@ -93,6 +94,8 @@ config SND_SOC_SSM2602
config SND_SOC_TLV320AIC23
tristate
+config SND_SOC_SPDIF
+ tristate
config SND_SOC_TLV320AIC26
tristate "TI TLV320AIC26 Codec support" if SND_SOC_OF_SIMPLE
diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile
index d8e15a4..10d5729 100644
--- a/sound/soc/codecs/Makefile
+++ b/sound/soc/codecs/Makefile
@@ -10,6 +10,7 @@ snd-soc-ssm2602-objs := ssm2602.o
snd-soc-tlv320aic23-objs := tlv320aic23.o
snd-soc-tlv320aic26-objs := tlv320aic26.o
snd-soc-tlv320aic3x-objs := tlv320aic3x.o
+snd-soc-spdif-objs := spdif_transciever.o
snd-soc-twl4030-objs := twl4030.o
snd-soc-uda134x-objs := uda134x.o
snd-soc-uda1380-objs := uda1380.o
@@ -43,6 +44,7 @@ obj-$(CONFIG_SND_SOC_SSM2602) += snd-soc-ssm2602.o
obj-$(CONFIG_SND_SOC_TLV320AIC23) += snd-soc-tlv320aic23.o
obj-$(CONFIG_SND_SOC_TLV320AIC26) += snd-soc-tlv320aic26.o
obj-$(CONFIG_SND_SOC_TLV320AIC3X) += snd-soc-tlv320aic3x.o
+obj-$(CONFIG_SND_SOC_SPDIF) += snd-soc-spdif.o
obj-$(CONFIG_SND_SOC_TWL4030) += snd-soc-twl4030.o
obj-$(CONFIG_SND_SOC_UDA134X) += snd-soc-uda134x.o
obj-$(CONFIG_SND_SOC_UDA1380) += snd-soc-uda1380.o
diff --git a/sound/soc/codecs/spdif_transciever.c b/sound/soc/codecs/spdif_transciever.c
new file mode 100644
index 0000000..45f56ae
--- /dev/null
+++ b/sound/soc/codecs/spdif_transciever.c
@@ -0,0 +1,69 @@
+/*
+ * ALSA SoC DaVinci DIT driver
+ *
+ * TI DaVinci audio controller can operate in DIT (SPDI/F) where
+ * no codec is needed. This file provides stub codec that can be used
+ * in these configurations.
+ *
+ * Author: Steve Chen, <schen at mvista.com>
+ * Copyright: (C) 2009 MontaVista Software, Inc., <source at mvista.com>
+ * Copyright: (C) 2009 Texas Instruments, India
+ *
+ * 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 <sound/soc.h>
+#include <sound/pcm.h>
+
+#define STUB_RATES SNDRV_PCM_RATE_8000_96000
+#define STUB_FORMATS SNDRV_PCM_FMTBIT_S16_LE
+
+
+struct snd_soc_dai dit_stub_dai = {
+ .name = "DIT",
+ .playback = {
+ .stream_name = "Playback",
+ .channels_min = 1,
+ .channels_max = 384,
+ .rates = STUB_RATES,
+ .formats = STUB_FORMATS,
+ },
+};
+
+static int davinci_dit_probe(struct platform_device *pdev)
+{
+ return snd_soc_register_dai(&dit_stub_dai);
+}
+
+static int davinci_dit_remove(struct platform_device *pdev)
+{
+ snd_soc_unregister_dai(&dit_stub_dai);
+ return 0;
+}
+
+static struct platform_driver davinci_dit_driver = {
+ .probe = davinci_dit_probe,
+ .remove = davinci_dit_remove,
+ .driver = {
+ .name = "davinci-dit",
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init dit_modinit(void)
+{
+ return platform_driver_register(&davinci_dit_driver);
+}
+
+static void __exit dit_exit(void)
+{
+ platform_driver_unregister(&davinci_dit_driver);
+}
+
+module_init(dit_modinit);
+module_exit(dit_exit);
+
diff --git a/sound/soc/codecs/spdif_transciever.h b/sound/soc/codecs/spdif_transciever.h
new file mode 100644
index 0000000..296f2eb
--- /dev/null
+++ b/sound/soc/codecs/spdif_transciever.h
@@ -0,0 +1,17 @@
+/*
+ * ALSA SoC DIT/DIR driver header
+ *
+ * Author: Steve Chen, <schen at mvista.com>
+ * Copyright: (C) 2008 MontaVista Software, Inc., <source at mvista.com>
+ *
+ * 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.
+ */
+
+#ifndef CODEC_STUBS_H
+#define CODEC_STUBS_H
+
+extern struct snd_soc_dai dit_stub_dai;
+
+#endif /* CODEC_STUBS_H */
diff --git a/sound/soc/davinci/Kconfig b/sound/soc/davinci/Kconfig
index 0ae84d4..03631a7 100644
--- a/sound/soc/davinci/Kconfig
+++ b/sound/soc/davinci/Kconfig
@@ -26,6 +26,7 @@ config SND_DM6467_SOC_EVM
depends on SND_DAVINCI_SOC && MACH_DAVINCI_DM6467_EVM
select SND_DAVINCI_SOC_I2S_MCASP
select SND_SOC_TLV320AIC3X
+ select SND_SOC_SPDIF
help
Say Y if you want to add support for SoC audio on TI
DaVinci DM6467 EVM platform.
--
1.5.6
More information about the Alsa-devel
mailing list