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/*
* 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, ¶m);
if (ret) {
dev_err(dev, "SPORT tx is busy!\n");
return ret;
}
} else {
ret = sport_set_rx_params(sport, ¶m);
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, ¶m);
if (ret) {
dev_err(dev, "SPORT tx is busy!\n");
return ret;
}
ret = sport_set_rx_params(sport, ¶m);
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");
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