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OpenCloudOS-Kernel/sound/soc/blackfin/bf5xx-i2s.c

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/*
* File: sound/soc/blackfin/bf5xx-i2s.c
* Author: Cliff Cai <Cliff.Cai@analog.com>
*
* Created: Tue June 06 2008
* Description: Blackfin I2S CPU DAI driver
*
* Modified:
* Copyright 2008 Analog Devices Inc.
*
* Bugs: Enter bugs at http://blackfin.uclinux.org/
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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, see the file COPYING, or write
* to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/delay.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/initval.h>
#include <sound/soc.h>
#include <asm/irq.h>
#include <asm/portmux.h>
#include <linux/mutex.h>
#include <linux/gpio.h>
#include "bf5xx-sport.h"
struct bf5xx_i2s_port {
u16 tcr1;
u16 rcr1;
u16 tcr2;
u16 rcr2;
int configured;
};
static int bf5xx_i2s_set_dai_fmt(struct snd_soc_dai *cpu_dai,
unsigned int fmt)
{
struct sport_device *sport_handle = snd_soc_dai_get_drvdata(cpu_dai);
struct bf5xx_i2s_port *bf5xx_i2s = sport_handle->private_data;
int ret = 0;
/* interface format:support I2S,slave mode */
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
bf5xx_i2s->tcr1 |= TFSR | TCKFE;
bf5xx_i2s->rcr1 |= RFSR | RCKFE;
bf5xx_i2s->tcr2 |= TSFSE;
bf5xx_i2s->rcr2 |= RSFSE;
break;
case SND_SOC_DAIFMT_DSP_A:
bf5xx_i2s->tcr1 |= TFSR;
bf5xx_i2s->rcr1 |= RFSR;
break;
case SND_SOC_DAIFMT_LEFT_J:
ret = -EINVAL;
break;
default:
printk(KERN_ERR "%s: Unknown DAI format type\n", __func__);
ret = -EINVAL;
break;
}
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:
printk(KERN_ERR "%s: Unknown DAI master type\n", __func__);
ret = -EINVAL;
break;
}
return ret;
}
static int bf5xx_i2s_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct sport_device *sport_handle = snd_soc_dai_get_drvdata(dai);
struct bf5xx_i2s_port *bf5xx_i2s = sport_handle->private_data;
int ret = 0;
bf5xx_i2s->tcr2 &= ~0x1f;
bf5xx_i2s->rcr2 &= ~0x1f;
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S8:
bf5xx_i2s->tcr2 |= 7;
bf5xx_i2s->rcr2 |= 7;
sport_handle->wdsize = 1;
case SNDRV_PCM_FORMAT_S16_LE:
bf5xx_i2s->tcr2 |= 15;
bf5xx_i2s->rcr2 |= 15;
sport_handle->wdsize = 2;
break;
case SNDRV_PCM_FORMAT_S24_LE:
bf5xx_i2s->tcr2 |= 23;
bf5xx_i2s->rcr2 |= 23;
sport_handle->wdsize = 3;
break;
case SNDRV_PCM_FORMAT_S32_LE:
bf5xx_i2s->tcr2 |= 31;
bf5xx_i2s->rcr2 |= 31;
sport_handle->wdsize = 4;
break;
}
if (!bf5xx_i2s->configured) {
/*
* TX and RX are not independent,they are enabled at the
* same time, even if only one side is running. So, we
* need to configure both of them at the time when the first
* stream is opened.
*
* CPU DAI:slave mode.
*/
bf5xx_i2s->configured = 1;
ret = sport_config_rx(sport_handle, bf5xx_i2s->rcr1,
bf5xx_i2s->rcr2, 0, 0);
if (ret) {
pr_err("SPORT is busy!\n");
return -EBUSY;
}
ret = sport_config_tx(sport_handle, bf5xx_i2s->tcr1,
bf5xx_i2s->tcr2, 0, 0);
if (ret) {
pr_err("SPORT is busy!\n");
return -EBUSY;
}
}
return 0;
}
static void bf5xx_i2s_shutdown(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct sport_device *sport_handle = snd_soc_dai_get_drvdata(dai);
struct bf5xx_i2s_port *bf5xx_i2s = sport_handle->private_data;
pr_debug("%s enter\n", __func__);
/* No active stream, SPORT is allowed to be configured again. */
if (!dai->active)
bf5xx_i2s->configured = 0;
}
#ifdef CONFIG_PM
static int bf5xx_i2s_suspend(struct snd_soc_dai *dai)
{
struct sport_device *sport_handle = snd_soc_dai_get_drvdata(dai);
pr_debug("%s : sport %d\n", __func__, dai->id);
if (dai->capture_active)
sport_rx_stop(sport_handle);
if (dai->playback_active)
sport_tx_stop(sport_handle);
return 0;
}
static int bf5xx_i2s_resume(struct snd_soc_dai *dai)
{
struct sport_device *sport_handle = snd_soc_dai_get_drvdata(dai);
struct bf5xx_i2s_port *bf5xx_i2s = sport_handle->private_data;
int ret;
pr_debug("%s : sport %d\n", __func__, dai->id);
ret = sport_config_rx(sport_handle, bf5xx_i2s->rcr1,
bf5xx_i2s->rcr2, 0, 0);
if (ret) {
pr_err("SPORT is busy!\n");
return -EBUSY;
}
ret = sport_config_tx(sport_handle, bf5xx_i2s->tcr1,
bf5xx_i2s->tcr2, 0, 0);
if (ret) {
pr_err("SPORT is busy!\n");
return -EBUSY;
}
return 0;
}
#else
#define bf5xx_i2s_suspend NULL
#define bf5xx_i2s_resume NULL
#endif
#define BF5XX_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 BF5XX_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 bf5xx_i2s_dai_ops = {
.shutdown = bf5xx_i2s_shutdown,
.hw_params = bf5xx_i2s_hw_params,
.set_fmt = bf5xx_i2s_set_dai_fmt,
};
static struct snd_soc_dai_driver bf5xx_i2s_dai = {
.suspend = bf5xx_i2s_suspend,
.resume = bf5xx_i2s_resume,
.playback = {
.channels_min = 1,
.channels_max = 2,
.rates = BF5XX_I2S_RATES,
.formats = BF5XX_I2S_FORMATS,},
.capture = {
.channels_min = 1,
.channels_max = 2,
.rates = BF5XX_I2S_RATES,
.formats = BF5XX_I2S_FORMATS,},
.ops = &bf5xx_i2s_dai_ops,
};
static int __devinit bf5xx_i2s_probe(struct platform_device *pdev)
{
struct sport_device *sport_handle;
int ret;
/* configure SPORT for I2S */
sport_handle = sport_init(pdev, 4, 2 * sizeof(u32),
sizeof(struct bf5xx_i2s_port));
if (!sport_handle)
return -ENODEV;
/* register with the ASoC layers */
ret = snd_soc_register_dai(&pdev->dev, &bf5xx_i2s_dai);
if (ret) {
pr_err("Failed to register DAI: %d\n", ret);
sport_done(sport_handle);
return ret;
}
return 0;
}
static int __devexit bf5xx_i2s_remove(struct platform_device *pdev)
{
struct sport_device *sport_handle = platform_get_drvdata(pdev);
pr_debug("%s enter\n", __func__);
snd_soc_unregister_dai(&pdev->dev);
sport_done(sport_handle);
return 0;
}
static struct platform_driver bfin_i2s_driver = {
.probe = bf5xx_i2s_probe,
.remove = __devexit_p(bf5xx_i2s_remove),
.driver = {
.name = "bfin-i2s",
.owner = THIS_MODULE,
},
};
static int __init bfin_i2s_init(void)
{
return platform_driver_register(&bfin_i2s_driver);
}
static void __exit bfin_i2s_exit(void)
{
platform_driver_unregister(&bfin_i2s_driver);
}
module_init(bfin_i2s_init);
module_exit(bfin_i2s_exit);
/* Module information */
MODULE_AUTHOR("Cliff Cai");
MODULE_DESCRIPTION("I2S driver for ADI Blackfin");
MODULE_LICENSE("GPL");
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