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: Naresh Medisetty naresh@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/davinci_codec_stubs.c | 83 ++++++++++++++++++++++++++++++++ sound/soc/codecs/davinci_codec_stubs.h | 23 +++++++++ 4 files changed, 111 insertions(+), 0 deletions(-) create mode 100644 sound/soc/codecs/davinci_codec_stubs.c create mode 100644 sound/soc/codecs/davinci_codec_stubs.h

diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig index b6c7f7a..59e50d0 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_CODEC_STUBS select SND_SOC_TWL4030 if TWL4030_CORE select SND_SOC_UDA134X select SND_SOC_UDA1380 if I2C @@ -91,6 +92,8 @@ config SND_SOC_SSM2602

config SND_SOC_TLV320AIC23 tristate +config SND_SOC_CODEC_STUBS + 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 030d245..70c26a5 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-davinci_stubs-objs := davinci_codec_stubs.o snd-soc-twl4030-objs := twl4030.o snd-soc-uda134x-objs := uda134x.o snd-soc-uda1380-objs := uda1380.o @@ -41,6 +42,7 @@ 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-$(CONFIG_SND_SOC_CODEC_STUBS) += snd-soc-davinci_stubs.o obj-$(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/davinci_codec_stubs.c b/sound/soc/codecs/davinci_codec_stubs.c new file mode 100644 index 0000000..63d56ad --- /dev/null +++ b/sound/soc/codecs/davinci_codec_stubs.c @@ -0,0 +1,83 @@ +/* + * ALSA SoC DaVinci DIT/DIR driver + * + * TI DaVinci audio controller can operate in DIT/DIR (SPDI/F) where + * no codec is needed. This file provides stub codec that can be used + * in these configurations. + * + * Author: Steve Chen, schen@mvista.com + * Copyright: (C) 2008 MontaVista Software, Inc., source@mvista.com + * Copyright: (C) 2008 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, + }, + } +}; + +struct snd_soc_dai dir_stub_dai[] = { + { + .name = "DIR", + .capture = { + .stream_name = "Capture", + .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 davici_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 = davici_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/davinci_codec_stubs.h b/sound/soc/codecs/davinci_codec_stubs.h new file mode 100644 index 0000000..693797b --- /dev/null +++ b/sound/soc/codecs/davinci_codec_stubs.h @@ -0,0 +1,23 @@ +/* + * ALSA SoC DIT/DIR driver header + * + * Author: Steve Chen, schen@mvista.com + * Copyright: (C) 2008 MontaVista Software, Inc., source@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 + +#ifdef CONFIG_SND_SOC_CODEC_STUBS +extern struct snd_soc_dai dit_stub_dai[]; +extern struct snd_soc_dai dir_stub_dai[]; +#else +#define dit_stub_dai NULL +#define dir_stub_dai NULL +#endif + +#endif /* CODEC_STUBS_H */