248 lines
6.5 KiB
C
248 lines
6.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* ALSA SoC Voice Codec Interface for TI DAVINCI processor
|
|
*
|
|
* Copyright (C) 2010 Texas Instruments.
|
|
*
|
|
* Author: Miguel Aguilar <miguel.aguilar@ridgerun.com>
|
|
*/
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/module.h>
|
|
#include <linux/device.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/io.h>
|
|
#include <linux/mfd/davinci_voicecodec.h>
|
|
|
|
#include <sound/core.h>
|
|
#include <sound/pcm.h>
|
|
#include <sound/pcm_params.h>
|
|
#include <sound/initval.h>
|
|
#include <sound/soc.h>
|
|
#include <sound/dmaengine_pcm.h>
|
|
|
|
#include "edma-pcm.h"
|
|
#include "davinci-i2s.h"
|
|
|
|
#define MOD_REG_BIT(val, mask, set) do { \
|
|
if (set) { \
|
|
val |= mask; \
|
|
} else { \
|
|
val &= ~mask; \
|
|
} \
|
|
} while (0)
|
|
|
|
struct davinci_vcif_dev {
|
|
struct davinci_vc *davinci_vc;
|
|
struct snd_dmaengine_dai_dma_data dma_data[2];
|
|
int dma_request[2];
|
|
};
|
|
|
|
static void davinci_vcif_start(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
|
|
struct davinci_vcif_dev *davinci_vcif_dev =
|
|
snd_soc_dai_get_drvdata(asoc_rtd_to_cpu(rtd, 0));
|
|
struct davinci_vc *davinci_vc = davinci_vcif_dev->davinci_vc;
|
|
u32 w;
|
|
|
|
/* Start the sample generator and enable transmitter/receiver */
|
|
w = readl(davinci_vc->base + DAVINCI_VC_CTRL);
|
|
|
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
|
|
MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTDAC, 0);
|
|
else
|
|
MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTADC, 0);
|
|
|
|
writel(w, davinci_vc->base + DAVINCI_VC_CTRL);
|
|
}
|
|
|
|
static void davinci_vcif_stop(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
|
|
struct davinci_vcif_dev *davinci_vcif_dev =
|
|
snd_soc_dai_get_drvdata(asoc_rtd_to_cpu(rtd, 0));
|
|
struct davinci_vc *davinci_vc = davinci_vcif_dev->davinci_vc;
|
|
u32 w;
|
|
|
|
/* Reset transmitter/receiver and sample rate/frame sync generators */
|
|
w = readl(davinci_vc->base + DAVINCI_VC_CTRL);
|
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
|
|
MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTDAC, 1);
|
|
else
|
|
MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTADC, 1);
|
|
|
|
writel(w, davinci_vc->base + DAVINCI_VC_CTRL);
|
|
}
|
|
|
|
static int davinci_vcif_hw_params(struct snd_pcm_substream *substream,
|
|
struct snd_pcm_hw_params *params,
|
|
struct snd_soc_dai *dai)
|
|
{
|
|
struct davinci_vcif_dev *davinci_vcif_dev = snd_soc_dai_get_drvdata(dai);
|
|
struct davinci_vc *davinci_vc = davinci_vcif_dev->davinci_vc;
|
|
u32 w;
|
|
|
|
/* Restart the codec before setup */
|
|
davinci_vcif_stop(substream);
|
|
davinci_vcif_start(substream);
|
|
|
|
/* General line settings */
|
|
writel(DAVINCI_VC_CTRL_MASK, davinci_vc->base + DAVINCI_VC_CTRL);
|
|
|
|
writel(DAVINCI_VC_INT_MASK, davinci_vc->base + DAVINCI_VC_INTCLR);
|
|
|
|
writel(DAVINCI_VC_INT_MASK, davinci_vc->base + DAVINCI_VC_INTEN);
|
|
|
|
w = readl(davinci_vc->base + DAVINCI_VC_CTRL);
|
|
|
|
/* Determine xfer data type */
|
|
switch (params_format(params)) {
|
|
case SNDRV_PCM_FORMAT_U8:
|
|
MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_BITS_8 |
|
|
DAVINCI_VC_CTRL_RD_UNSIGNED |
|
|
DAVINCI_VC_CTRL_WD_BITS_8 |
|
|
DAVINCI_VC_CTRL_WD_UNSIGNED, 1);
|
|
break;
|
|
case SNDRV_PCM_FORMAT_S8:
|
|
MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_BITS_8 |
|
|
DAVINCI_VC_CTRL_WD_BITS_8, 1);
|
|
|
|
MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_UNSIGNED |
|
|
DAVINCI_VC_CTRL_WD_UNSIGNED, 0);
|
|
break;
|
|
case SNDRV_PCM_FORMAT_S16_LE:
|
|
MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_BITS_8 |
|
|
DAVINCI_VC_CTRL_RD_UNSIGNED |
|
|
DAVINCI_VC_CTRL_WD_BITS_8 |
|
|
DAVINCI_VC_CTRL_WD_UNSIGNED, 0);
|
|
break;
|
|
default:
|
|
printk(KERN_WARNING "davinci-vcif: unsupported PCM format");
|
|
return -EINVAL;
|
|
}
|
|
|
|
writel(w, davinci_vc->base + DAVINCI_VC_CTRL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int davinci_vcif_trigger(struct snd_pcm_substream *substream, int cmd,
|
|
struct snd_soc_dai *dai)
|
|
{
|
|
int ret = 0;
|
|
|
|
switch (cmd) {
|
|
case SNDRV_PCM_TRIGGER_START:
|
|
case SNDRV_PCM_TRIGGER_RESUME:
|
|
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
|
|
davinci_vcif_start(substream);
|
|
break;
|
|
case SNDRV_PCM_TRIGGER_STOP:
|
|
case SNDRV_PCM_TRIGGER_SUSPEND:
|
|
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
|
|
davinci_vcif_stop(substream);
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
#define DAVINCI_VCIF_RATES SNDRV_PCM_RATE_8000_48000
|
|
|
|
static const struct snd_soc_dai_ops davinci_vcif_dai_ops = {
|
|
.trigger = davinci_vcif_trigger,
|
|
.hw_params = davinci_vcif_hw_params,
|
|
};
|
|
|
|
static int davinci_vcif_dai_probe(struct snd_soc_dai *dai)
|
|
{
|
|
struct davinci_vcif_dev *dev = snd_soc_dai_get_drvdata(dai);
|
|
|
|
dai->playback_dma_data = &dev->dma_data[SNDRV_PCM_STREAM_PLAYBACK];
|
|
dai->capture_dma_data = &dev->dma_data[SNDRV_PCM_STREAM_CAPTURE];
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct snd_soc_dai_driver davinci_vcif_dai = {
|
|
.probe = davinci_vcif_dai_probe,
|
|
.playback = {
|
|
.channels_min = 1,
|
|
.channels_max = 2,
|
|
.rates = DAVINCI_VCIF_RATES,
|
|
.formats = SNDRV_PCM_FMTBIT_S16_LE,},
|
|
.capture = {
|
|
.channels_min = 1,
|
|
.channels_max = 2,
|
|
.rates = DAVINCI_VCIF_RATES,
|
|
.formats = SNDRV_PCM_FMTBIT_S16_LE,},
|
|
.ops = &davinci_vcif_dai_ops,
|
|
|
|
};
|
|
|
|
static const struct snd_soc_component_driver davinci_vcif_component = {
|
|
.name = "davinci-vcif",
|
|
.legacy_dai_naming = 1,
|
|
};
|
|
|
|
static int davinci_vcif_probe(struct platform_device *pdev)
|
|
{
|
|
struct davinci_vc *davinci_vc = pdev->dev.platform_data;
|
|
struct davinci_vcif_dev *davinci_vcif_dev;
|
|
int ret;
|
|
|
|
davinci_vcif_dev = devm_kzalloc(&pdev->dev,
|
|
sizeof(struct davinci_vcif_dev),
|
|
GFP_KERNEL);
|
|
if (!davinci_vcif_dev)
|
|
return -ENOMEM;
|
|
|
|
/* DMA tx params */
|
|
davinci_vcif_dev->davinci_vc = davinci_vc;
|
|
davinci_vcif_dev->dma_data[SNDRV_PCM_STREAM_PLAYBACK].filter_data =
|
|
&davinci_vc->davinci_vcif.dma_tx_channel;
|
|
davinci_vcif_dev->dma_data[SNDRV_PCM_STREAM_PLAYBACK].addr =
|
|
davinci_vc->davinci_vcif.dma_tx_addr;
|
|
|
|
/* DMA rx params */
|
|
davinci_vcif_dev->dma_data[SNDRV_PCM_STREAM_CAPTURE].filter_data =
|
|
&davinci_vc->davinci_vcif.dma_rx_channel;
|
|
davinci_vcif_dev->dma_data[SNDRV_PCM_STREAM_CAPTURE].addr =
|
|
davinci_vc->davinci_vcif.dma_rx_addr;
|
|
|
|
dev_set_drvdata(&pdev->dev, davinci_vcif_dev);
|
|
|
|
ret = devm_snd_soc_register_component(&pdev->dev,
|
|
&davinci_vcif_component,
|
|
&davinci_vcif_dai, 1);
|
|
if (ret != 0) {
|
|
dev_err(&pdev->dev, "could not register dai\n");
|
|
return ret;
|
|
}
|
|
|
|
ret = edma_pcm_platform_register(&pdev->dev);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "register PCM failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver davinci_vcif_driver = {
|
|
.probe = davinci_vcif_probe,
|
|
.driver = {
|
|
.name = "davinci-vcif",
|
|
},
|
|
};
|
|
|
|
module_platform_driver(davinci_vcif_driver);
|
|
|
|
MODULE_AUTHOR("Miguel Aguilar");
|
|
MODULE_DESCRIPTION("Texas Instruments DaVinci ASoC Voice Codec Interface");
|
|
MODULE_LICENSE("GPL");
|