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