Re: [PATCH] alsa: add beagleboard SoC configuration.

[Tony Lindgren <tony@atomide.com>]

* Felipe Contreras <felipe.contreras@gmail.com> [081022 09:31]:
> This is exactly the same as the overo configuration.

This should go to alsa-devel list with l-o list cc'd. AFAIK, all
the omap ASoC stuff is in mainline already. I will not push it
to l-o until we have an ack from alsa-devel.

Cheers,

Tony


> Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>
> ---
> 
> I'm resending this patch since it hasn't been applied yet.
> 
> I have only tested this with alsa->oss emulation.
> 
>  sound/soc/omap/Kconfig       |    8 ++
>  sound/soc/omap/Makefile      |    2 +
>  sound/soc/omap/omap3beagle.c |  149 ++++++++++++++++++++++++++++++++++++++++++
>  3 files changed, 159 insertions(+), 0 deletions(-)
>  create mode 100644 sound/soc/omap/omap3beagle.c
> 
> diff --git a/sound/soc/omap/Kconfig b/sound/soc/omap/Kconfig
> index d7b8939..ebad024 100644
> --- a/sound/soc/omap/Kconfig
> +++ b/sound/soc/omap/Kconfig
> @@ -22,3 +22,11 @@ config SND_OMAP_SOC_OVERO
>  	help
>  	  Say Y if you want to add support for SoC audio on the Gumstix Overo.
>  
> +config SND_OMAP_SOC_OMAP3_BEAGLE
> +	tristate "SoC Audio support for OMAP3 Beagle"
> +	depends on SND_OMAP_SOC && MACH_OMAP3_BEAGLE
> +	select SND_OMAP_SOC_MCBSP
> +	select SND_SOC_TWL4030
> +	help
> +	  Say Y if you want to add support for SoC audio on the Beagleboard.
> +
> diff --git a/sound/soc/omap/Makefile b/sound/soc/omap/Makefile
> index b96b97b..09fd0bb 100644
> --- a/sound/soc/omap/Makefile
> +++ b/sound/soc/omap/Makefile
> @@ -8,7 +8,9 @@ obj-$(CONFIG_SND_OMAP_SOC_MCBSP) += snd-soc-omap-mcbsp.o
>  # OMAP Machine Support
>  snd-soc-n810-objs := n810.o
>  snd-soc-overo-objs := overo.o
> +snd-soc-omap3beagle-objs := omap3beagle.o
>  
>  obj-$(CONFIG_SND_OMAP_SOC_N810) += snd-soc-n810.o
>  obj-$(CONFIG_SND_OMAP_SOC_OVERO) += snd-soc-overo.o
> +obj-$(CONFIG_SND_OMAP_SOC_OMAP3_BEAGLE) += snd-soc-omap3beagle.o
>  
> diff --git a/sound/soc/omap/omap3beagle.c b/sound/soc/omap/omap3beagle.c
> new file mode 100644
> index 0000000..1d0e398
> --- /dev/null
> +++ b/sound/soc/omap/omap3beagle.c
> @@ -0,0 +1,149 @@
> +/*
> + * omap3beagle.c  --  SoC audio for OMAP3 Beagle
> + *
> + * Author: Steve Sakoman <steve@sakoman.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.
> + *
> + * This program is distributed in the hope that it will be useful, but
> + * WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
> + * General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
> + * 02110-1301 USA
> + *
> + */
> +
> +#include <linux/clk.h>
> +#include <linux/platform_device.h>
> +#include <sound/core.h>
> +#include <sound/pcm.h>
> +#include <sound/soc.h>
> +#include <sound/soc-dapm.h>
> +
> +#include <asm/mach-types.h>
> +#include <mach/hardware.h>
> +#include <mach/gpio.h>
> +#include <mach/mcbsp.h>
> +
> +#include "omap-mcbsp.h"
> +#include "omap-pcm.h"
> +#include "../codecs/twl4030.h"
> +
> +static int omap3beagle_hw_params(struct snd_pcm_substream *substream,
> +	struct snd_pcm_hw_params *params)
> +{
> +	struct snd_soc_pcm_runtime *rtd = substream->private_data;
> +	struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
> +	struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
> +	int ret;
> +
> +	/* Set codec DAI configuration */
> +	ret = snd_soc_dai_set_fmt(codec_dai,
> +				  SND_SOC_DAIFMT_I2S |
> +				  SND_SOC_DAIFMT_NB_NF |
> +				  SND_SOC_DAIFMT_CBM_CFM);
> +	if (ret < 0) {
> +		printk(KERN_ERR "can't set codec DAI configuration\n");
> +		return ret;
> +	}
> +
> +	/* Set cpu DAI configuration */
> +	ret = snd_soc_dai_set_fmt(cpu_dai,
> +				  SND_SOC_DAIFMT_I2S |
> +				  SND_SOC_DAIFMT_NB_NF |
> +				  SND_SOC_DAIFMT_CBM_CFM);
> +	if (ret < 0) {
> +		printk(KERN_ERR "can't set cpu DAI configuration\n");
> +		return ret;
> +	}
> +
> +	/* Set the codec system clock for DAC and ADC */
> +	ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000,
> +				     SND_SOC_CLOCK_IN);
> +	if (ret < 0) {
> +		printk(KERN_ERR "can't set codec system clock\n");
> +		return ret;
> +	}
> +
> +	return 0;
> +}
> +
> +static struct snd_soc_ops omap3beagle_ops = {
> +	.hw_params = omap3beagle_hw_params,
> +};
> +
> +/* Digital audio interface glue - connects codec <--> CPU */
> +static struct snd_soc_dai_link omap3beagle_dai = {
> +	.name = "TWL4030",
> +	.stream_name = "TWL4030",
> +	.cpu_dai = &omap_mcbsp_dai[0],
> +	.codec_dai = &twl4030_dai,
> +	.ops = &omap3beagle_ops,
> +};
> +
> +/* Audio machine driver */
> +static struct snd_soc_machine snd_soc_machine_omap3beagle = {
> +	.name = "omap3beagle",
> +	.dai_link = &omap3beagle_dai,
> +	.num_links = 1,
> +};
> +
> +/* Audio subsystem */
> +static struct snd_soc_device omap3beagle_snd_devdata = {
> +	.machine = &snd_soc_machine_omap3beagle,
> +	.platform = &omap_soc_platform,
> +	.codec_dev = &soc_codec_dev_twl4030,
> +};
> +
> +static struct platform_device *omap3beagle_snd_device;
> +
> +static int __init omap3beagle_soc_init(void)
> +{
> +	int ret;
> +
> +	printk(KERN_INFO "OMAP3 Beagle SoC init\n");
> +	if (!machine_is_omap3_beagle()) {
> +		printk(KERN_ERR "Not OMAP3 Beagle!\n");
> +		return -ENODEV;
> +	}
> +
> +	omap3beagle_snd_device = platform_device_alloc("soc-audio", -1);
> +	if (!omap3beagle_snd_device) {
> +		printk(KERN_ERR "Platform device allocation failed\n");
> +		return -ENOMEM;
> +	}
> +
> +	platform_set_drvdata(omap3beagle_snd_device, &omap3beagle_snd_devdata);
> +	omap3beagle_snd_devdata.dev = &omap3beagle_snd_device->dev;
> +	*(unsigned int *)omap3beagle_dai.cpu_dai->private_data = 1; /* McBSP2 */
> +
> +	ret = platform_device_add(omap3beagle_snd_device);
> +	if (ret)
> +		goto err1;
> +
> +	return 0;
> +
> +err1:
> +	printk(KERN_ERR "Unable to add platform device\n");
> +	platform_device_put(omap3beagle_snd_device);
> +
> +	return ret;
> +}
> +
> +static void __exit omap3beagle_soc_exit(void)
> +{
> +	platform_device_unregister(omap3beagle_snd_device);
> +}
> +
> +module_init(omap3beagle_soc_init);
> +module_exit(omap3beagle_soc_exit);
> +
> +MODULE_AUTHOR("Steve Sakoman <steve@sakoman.com>");
> +MODULE_DESCRIPTION("ALSA SoC OMAP3 Beagle");
> +MODULE_LICENSE("GPL");
> -- 
> 1.6.0.2
> 
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