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Commit f62ae7bd authored by Scott Jiang's avatar Scott Jiang Committed by Mark Brown
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ASoC: add i2s dai driver for bf6xx soc 



This driver enables i2s mode support on blackfin bf6xx platform.
We reuse bf5xx-i2s-pcm.c as its i2s pcm driver because it's the same
for both bf5xx and bf6xx soc.

Signed-off-by: default avatarScott Jiang <scott.jiang.linux@gmail.com>
Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent d2aae47f

sound/soc/blackfin/Kconfig

+8 −3
Original line number Diff line number Diff line
@@ -10,12 +10,14 @@ config SND_BF5XX_I2S 
	  You will also need to select the audio interfaces to support below.



config SND_BF5XX_SOC_SSM2602

	tristate "SoC SSM2602 Audio support for BF52x ezkit"

	tristate "SoC SSM2602 Audio Codec Add-On Card support"

	depends on SND_BF5XX_I2S && (SPI_MASTER || I2C)

	select SND_BF5XX_SOC_I2S

	select SND_BF5XX_SOC_I2S if !BF60x

	select SND_BF6XX_SOC_I2S if BF60x

	select SND_SOC_SSM2602

	help

	  Say Y if you want to add support for SoC audio on BF527-EZKIT.

	  Say Y if you want to add support for the Analog Devices

	  SSM2602 Audio Codec Add-On Card.



config SND_SOC_BFIN_EVAL_ADAU1701

	tristate "Support for the EVAL-ADAU1701MINIZ board on Blackfin eval boards"
@@ -169,6 +171,9 @@ config SND_BF6XX_SOC_SPORT 
config SND_BF5XX_SOC_I2S

	tristate



config SND_BF6XX_SOC_I2S

	tristate



config SND_BF5XX_SOC_TDM

	tristate

sound/soc/blackfin/Makefile

+2 −0
Original line number Diff line number Diff line
@@ -6,6 +6,7 @@ snd-soc-bf5xx-sport-objs := bf5xx-sport.o 
snd-soc-bf6xx-sport-objs := bf6xx-sport.o

snd-soc-bf5xx-ac97-objs := bf5xx-ac97.o

snd-soc-bf5xx-i2s-objs := bf5xx-i2s.o

snd-soc-bf6xx-i2s-objs := bf6xx-i2s.o

snd-soc-bf5xx-tdm-objs := bf5xx-tdm.o



obj-$(CONFIG_SND_BF5XX_AC97) += snd-bf5xx-ac97.o
@@ -15,6 +16,7 @@ obj-$(CONFIG_SND_BF5XX_SOC_SPORT) += snd-soc-bf5xx-sport.o 
obj-$(CONFIG_SND_BF6XX_SOC_SPORT) += snd-soc-bf6xx-sport.o

obj-$(CONFIG_SND_BF5XX_SOC_AC97) += snd-soc-bf5xx-ac97.o

obj-$(CONFIG_SND_BF5XX_SOC_I2S) += snd-soc-bf5xx-i2s.o

obj-$(CONFIG_SND_BF6XX_SOC_I2S) += snd-soc-bf6xx-i2s.o

obj-$(CONFIG_SND_BF5XX_SOC_TDM) += snd-soc-bf5xx-tdm.o



# Blackfin Machine Support

sound/soc/blackfin/bf6xx-i2s.c

0 → 100644
+234 −0
Original line number Diff line number Diff line 
/*

 * bf6xx-i2s.c - Analog Devices BF6XX i2s interface driver

 *

 * Copyright (c) 2012 Analog Devices Inc.

 *

 * 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., 675 Mass Ave, Cambridge, MA 02139, USA.

 */



#include <linux/device.h>

#include <linux/init.h>

#include <linux/module.h>

#include <linux/platform_device.h>

#include <sound/pcm.h>

#include <sound/pcm_params.h>

#include <sound/soc.h>

#include <sound/soc-dai.h>



#include "bf6xx-sport.h"



struct sport_params param;



static int bfin_i2s_set_dai_fmt(struct snd_soc_dai *cpu_dai,

		unsigned int fmt)

{

	struct sport_device *sport = snd_soc_dai_get_drvdata(cpu_dai);

	struct device *dev = &sport->pdev->dev;

	int ret = 0;



	param.spctl &= ~(SPORT_CTL_OPMODE | SPORT_CTL_CKRE | SPORT_CTL_FSR

			| SPORT_CTL_LFS | SPORT_CTL_LAFS);

	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {

	case SND_SOC_DAIFMT_I2S:

		param.spctl |= SPORT_CTL_OPMODE | SPORT_CTL_CKRE

			| SPORT_CTL_LFS;

		break;

	case SND_SOC_DAIFMT_DSP_A:

		param.spctl |= SPORT_CTL_FSR;

		break;

	case SND_SOC_DAIFMT_LEFT_J:

		param.spctl |= SPORT_CTL_OPMODE | SPORT_CTL_LFS

			| SPORT_CTL_LAFS;

		break;

	default:

		dev_err(dev, "%s: Unknown DAI format type\n", __func__);

		ret = -EINVAL;

		break;

	}



	param.spctl &= ~(SPORT_CTL_ICLK | SPORT_CTL_IFS);

	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {

	case SND_SOC_DAIFMT_CBM_CFM:

		break;

	case SND_SOC_DAIFMT_CBS_CFS:

	case SND_SOC_DAIFMT_CBM_CFS:

	case SND_SOC_DAIFMT_CBS_CFM:

		ret = -EINVAL;

		break;

	default:

		dev_err(dev, "%s: Unknown DAI master type\n", __func__);

		ret = -EINVAL;

		break;

	}



	return ret;

}



static int bfin_i2s_hw_params(struct snd_pcm_substream *substream,

				struct snd_pcm_hw_params *params,

				struct snd_soc_dai *dai)

{

	struct sport_device *sport = snd_soc_dai_get_drvdata(dai);

	struct device *dev = &sport->pdev->dev;

	int ret = 0;



	param.spctl &= ~SPORT_CTL_SLEN;

	switch (params_format(params)) {

	case SNDRV_PCM_FORMAT_S8:

		param.spctl |= 0x70;

		sport->wdsize = 1;

	case SNDRV_PCM_FORMAT_S16_LE:

		param.spctl |= 0xf0;

		sport->wdsize = 2;

		break;

	case SNDRV_PCM_FORMAT_S24_LE:

		param.spctl |= 0x170;

		sport->wdsize = 3;

		break;

	case SNDRV_PCM_FORMAT_S32_LE:

		param.spctl |= 0x1f0;

		sport->wdsize = 4;

		break;

	}



	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {

		ret = sport_set_tx_params(sport, &param);

		if (ret) {

			dev_err(dev, "SPORT tx is busy!\n");

			return ret;

		}

	} else {

		ret = sport_set_rx_params(sport, &param);

		if (ret) {

			dev_err(dev, "SPORT rx is busy!\n");

			return ret;

		}

	}

	return 0;

}



#ifdef CONFIG_PM

static int bfin_i2s_suspend(struct snd_soc_dai *dai)

{

	struct sport_device *sport = snd_soc_dai_get_drvdata(dai);



	if (dai->capture_active)

		sport_rx_stop(sport);

	if (dai->playback_active)

		sport_tx_stop(sport);

	return 0;

}



static int bfin_i2s_resume(struct snd_soc_dai *dai)

{

	struct sport_device *sport = snd_soc_dai_get_drvdata(dai);

	struct device *dev = &sport->pdev->dev;

	int ret;



	ret = sport_set_tx_params(sport, &param);

	if (ret) {

		dev_err(dev, "SPORT tx is busy!\n");

		return ret;

	}

	ret = sport_set_rx_params(sport, &param);

	if (ret) {

		dev_err(dev, "SPORT rx is busy!\n");

		return ret;

	}



	return 0;

}



#else

#define bfin_i2s_suspend NULL

#define bfin_i2s_resume NULL

#endif



#define BFIN_I2S_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\

		SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | \

		SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 | \

		SNDRV_PCM_RATE_96000)



#define BFIN_I2S_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE | \

		SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)



static struct snd_soc_dai_ops bfin_i2s_dai_ops = {

	.hw_params	= bfin_i2s_hw_params,

	.set_fmt	= bfin_i2s_set_dai_fmt,

};



static struct snd_soc_dai_driver bfin_i2s_dai = {

	.suspend = bfin_i2s_suspend,

	.resume = bfin_i2s_resume,

	.playback = {

		.channels_min = 1,

		.channels_max = 2,

		.rates = BFIN_I2S_RATES,

		.formats = BFIN_I2S_FORMATS,

	},

	.capture = {

		.channels_min = 1,

		.channels_max = 2,

		.rates = BFIN_I2S_RATES,

		.formats = BFIN_I2S_FORMATS,

	},

	.ops = &bfin_i2s_dai_ops,

};



static int __devinit bfin_i2s_probe(struct platform_device *pdev)

{

	struct sport_device *sport;

	struct device *dev = &pdev->dev;

	int ret;



	sport = sport_create(pdev);

	if (!sport)

		return -ENODEV;



	/* register with the ASoC layers */

	ret = snd_soc_register_dai(dev, &bfin_i2s_dai);

	if (ret) {

		dev_err(dev, "Failed to register DAI: %d\n", ret);

		sport_delete(sport);

		return ret;

	}

	platform_set_drvdata(pdev, sport);



	return 0;

}



static int __devexit bfin_i2s_remove(struct platform_device *pdev)

{

	struct sport_device *sport = platform_get_drvdata(pdev);



	snd_soc_unregister_dai(&pdev->dev);

	sport_delete(sport);



	return 0;

}



static struct platform_driver bfin_i2s_driver = {

	.probe  = bfin_i2s_probe,

	.remove = __devexit_p(bfin_i2s_remove),

	.driver = {

		.name = "bfin-i2s",

		.owner = THIS_MODULE,

	},

};



module_platform_driver(bfin_i2s_driver);



MODULE_DESCRIPTION("Analog Devices BF6XX i2s interface driver");

MODULE_AUTHOR("Scott Jiang <Scott.Jiang.Linux@gmail.com>");

MODULE_LICENSE("GPL v2");