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// 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 2ch 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(rtd->cpu_dai,
SND_SOC_DAIFMT_I2S |
SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBS_CFS);
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(rtd->cpu_dai, 0x3, 0x3, 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 struct snd_soc_ops aif1_ops = {
.startup = aif1_startup,
};
static struct snd_soc_dai_link dais[] = {
[MERR_DPCM_AUDIO] = {
.name = "Audio Port",
.stream_name = "Audio",
.cpu_dai_name = "media-cpu-dai",
.codec_dai_name = "snd-soc-dummy-dai",
.codec_name = "snd-soc-dummy",
.platform_name = "sst-mfld-platform",
.ignore_suspend = 1,
.nonatomic = true,
.dynamic = 1,
.dpcm_playback = 1,
.dpcm_capture = 1,
.ops = &aif1_ops,
},
[MERR_DPCM_DEEP_BUFFER] = {
.name = "Deep-Buffer Audio Port",
.stream_name = "Deep-Buffer Audio",
.cpu_dai_name = "deepbuffer-cpu-dai",
.codec_dai_name = "snd-soc-dummy-dai",
.codec_name = "snd-soc-dummy",
.platform_name = "sst-mfld-platform",
.ignore_suspend = 1,
.nonatomic = true,
.dynamic = 1,
.dpcm_playback = 1,
.ops = &aif1_ops,
},
/* CODEC<->CODEC link */
/* back ends */
{
.name = "SSP2-LowSpeed Connector",
.id = 0,
.cpu_dai_name = "ssp2-port",
.platform_name = "sst-mfld-platform",
.no_pcm = 1,
.codec_dai_name = "snd-soc-dummy-dai",
.codec_name = "snd-soc-dummy",
.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
| SND_SOC_DAIFMT_CBS_CFS,
.be_hw_params_fixup = codec_fixup,
.ignore_suspend = 1,
.nonatomic = true,
.dpcm_playback = 1,
.dpcm_capture = 1,
},
};
/* 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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