mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 19:00:25 +00:00
![Scott Jiang](/assets/img/avatar_default.png)
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: Scott Jiang <scott.jiang.linux@gmail.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
234 lines
5.5 KiB
C
234 lines
5.5 KiB
C
/*
|
|
* 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");
|