// SPDX-License-Identifier: GPL-2.0-only
/*
* bytcht_nocodec . c - ASoc Machine driver for MinnowBoard Max and Up
* to make I2S signals observable on the Low - Speed connector . Audio codec
* is not managed by ASoC / DAPM
*
* Copyright ( C ) 2015 - 2017 Intel Corp
*
* ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
*
* ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
*/
#include <linux/module.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include "../atom/sst-atom-controls.h"
static const struct snd_soc_dapm_widget widgets[] = {
SND_SOC_DAPM_MIC("Mic" , NULL),
SND_SOC_DAPM_SPK("Speaker" , NULL),
};
static const struct snd_kcontrol_new controls[] = {
SOC_DAPM_PIN_SWITCH("Mic" ),
SOC_DAPM_PIN_SWITCH("Speaker" ),
};
static const struct snd_soc_dapm_route audio_map[] = {
{"ssp2 Tx" , NULL, "codec_out0" },
{"ssp2 Tx" , NULL, "codec_out1" },
{"codec_in0" , NULL, "ssp2 Rx" },
{"codec_in1" , NULL, "ssp2 Rx" },
{"ssp2 Rx" , NULL, "Mic" },
{"Speaker" , NULL, "ssp2 Tx" },
};
static int codec_fixup(struct snd_soc_pcm_runtime *rtd,
struct snd_pcm_hw_params *params)
{
struct snd_interval *rate = hw_param_interval(params,
SNDRV_PCM_HW_PARAM_RATE);
struct snd_interval *channels = hw_param_interval(params,
SNDRV_PCM_HW_PARAM_CHANNELS);
int ret;
/* The DSP will convert the FE rate to 48k, stereo, 24bits */
rate->min = rate->max = 48000 ;
channels->min = channels->max = 2 ;
/* set SSP2 to 24-bit */
params_set_format(params, SNDRV_PCM_FORMAT_S24_LE);
/*
* Default mode for SSP configuration is TDM 4 slot , override config
* with explicit setting to I2S 2 ch 24 - bit . The word length is set with
* dai_set_tdm_slot ( ) since there is no other API exposed
*/
ret = snd_soc_dai_set_fmt(snd_soc_rtd_to_cpu(rtd, 0 ),
SND_SOC_DAIFMT_I2S |
SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_BP_FP);
if (ret < 0 ) {
dev_err(rtd->dev, "can't set format to I2S, err %d\n" , ret);
return ret;
}
ret = snd_soc_dai_set_tdm_slot(snd_soc_rtd_to_cpu(rtd, 0 ), 0 x3, 0 x3, 2 , 24 );
if (ret < 0 ) {
dev_err(rtd->dev, "can't set I2S config, err %d\n" , ret);
return ret;
}
return 0 ;
}
static const unsigned int rates_48000[] = {
48000 ,
};
static const struct snd_pcm_hw_constraint_list constraints_48000 = {
.count = ARRAY_SIZE(rates_48000),
.list = rates_48000,
};
static int aif1_startup(struct snd_pcm_substream *substream)
{
return snd_pcm_hw_constraint_list(substream->runtime, 0 ,
SNDRV_PCM_HW_PARAM_RATE,
&constraints_48000);
}
static const struct snd_soc_ops aif1_ops = {
.startup = aif1_startup,
};
SND_SOC_DAILINK_DEF(dummy,
DAILINK_COMP_ARRAY(COMP_DUMMY()));
SND_SOC_DAILINK_DEF(media,
DAILINK_COMP_ARRAY(COMP_CPU("media-cpu-dai" )));
SND_SOC_DAILINK_DEF(deepbuffer,
DAILINK_COMP_ARRAY(COMP_CPU("deepbuffer-cpu-dai" )));
SND_SOC_DAILINK_DEF(ssp2_port,
DAILINK_COMP_ARRAY(COMP_CPU("ssp2-port" )));
SND_SOC_DAILINK_DEF(platform,
DAILINK_COMP_ARRAY(COMP_PLATFORM("sst-mfld-platform" )));
static struct snd_soc_dai_link dais[] = {
[MERR_DPCM_AUDIO] = {
.name = "Audio Port" ,
.stream_name = "Audio" ,
.ignore_suspend = 1 ,
.nonatomic = true ,
.dynamic = 1 ,
.ops = &aif1_ops,
SND_SOC_DAILINK_REG(media, dummy, platform),
},
[MERR_DPCM_DEEP_BUFFER] = {
.name = "Deep-Buffer Audio Port" ,
.stream_name = "Deep-Buffer Audio" ,
.ignore_suspend = 1 ,
.nonatomic = true ,
.dynamic = 1 ,
.playback_only = 1 ,
.ops = &aif1_ops,
SND_SOC_DAILINK_REG(deepbuffer, dummy, platform),
},
/* CODEC<->CODEC link */
/* back ends */
{
.name = "SSP2-LowSpeed Connector" ,
.id = 0 ,
.no_pcm = 1 ,
.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
| SND_SOC_DAIFMT_CBC_CFC,
.be_hw_params_fixup = codec_fixup,
.ignore_suspend = 1 ,
SND_SOC_DAILINK_REG(ssp2_port, dummy, platform),
},
};
/* SoC card */
static struct snd_soc_card bytcht_nocodec_card = {
.name = "bytcht-nocodec" ,
.owner = THIS_MODULE,
.dai_link = dais,
.num_links = ARRAY_SIZE(dais),
.dapm_widgets = widgets,
.num_dapm_widgets = ARRAY_SIZE(widgets),
.dapm_routes = audio_map,
.num_dapm_routes = ARRAY_SIZE(audio_map),
.controls = controls,
.num_controls = ARRAY_SIZE(controls),
.fully_routed = true ,
};
static int snd_bytcht_nocodec_mc_probe(struct platform_device *pdev)
{
int ret_val = 0 ;
/* register the soc card */
bytcht_nocodec_card.dev = &pdev->dev;
ret_val = devm_snd_soc_register_card(&pdev->dev, &bytcht_nocodec_card);
if (ret_val) {
dev_err(&pdev->dev, "devm_snd_soc_register_card failed %d\n" ,
ret_val);
return ret_val;
}
platform_set_drvdata(pdev, &bytcht_nocodec_card);
return ret_val;
}
static struct platform_driver snd_bytcht_nocodec_mc_driver = {
.driver = {
.name = "bytcht_nocodec" ,
},
.probe = snd_bytcht_nocodec_mc_probe,
};
module_platform_driver(snd_bytcht_nocodec_mc_driver);
MODULE_DESCRIPTION("ASoC Intel(R) Baytrail/Cherrytrail Nocodec Machine driver" );
MODULE_AUTHOR("Pierre-Louis Bossart <pierre-louis.bossart at linux.intel.com>" );
MODULE_LICENSE("GPL v2" );
MODULE_ALIAS("platform:bytcht_nocodec" );
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