/* * bytcht_es8316.c - ASoc Machine driver for Intel Baytrail/Cherrytrail * platforms with Everest ES8316 SoC * * Copyright (C) 2017 Endless Mobile, Inc. * Authors: David Yang , * Daniel Drake * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ * * 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; version 2 of the License. * * 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. * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */ #include #include #include #include #include #include #include #include #include #include #include #include "../atom/sst-atom-controls.h" #include "../common/sst-dsp.h" struct byt_cht_es8316_private { struct clk *mclk; }; static const struct snd_soc_dapm_widget byt_cht_es8316_widgets[] = { SND_SOC_DAPM_HP("Headphone", NULL), /* * The codec supports two analog microphone inputs. I have only * tested MIC1. A DMIC route could also potentially be added * if such functionality is found on another platform. */ SND_SOC_DAPM_MIC("Microphone 1", NULL), SND_SOC_DAPM_MIC("Microphone 2", NULL), }; static const struct snd_soc_dapm_route byt_cht_es8316_audio_map[] = { {"MIC1", NULL, "Microphone 1"}, {"MIC2", NULL, "Microphone 2"}, {"Headphone", NULL, "HPOL"}, {"Headphone", NULL, "HPOR"}, {"Playback", NULL, "ssp2 Tx"}, {"ssp2 Tx", NULL, "codec_out0"}, {"ssp2 Tx", NULL, "codec_out1"}, {"codec_in0", NULL, "ssp2 Rx" }, {"codec_in1", NULL, "ssp2 Rx" }, {"ssp2 Rx", NULL, "Capture"}, }; static const struct snd_kcontrol_new byt_cht_es8316_controls[] = { SOC_DAPM_PIN_SWITCH("Headphone"), SOC_DAPM_PIN_SWITCH("Microphone 1"), SOC_DAPM_PIN_SWITCH("Microphone 2"), }; static int byt_cht_es8316_init(struct snd_soc_pcm_runtime *runtime) { struct snd_soc_card *card = runtime->card; struct byt_cht_es8316_private *priv = snd_soc_card_get_drvdata(card); int ret; card->dapm.idle_bias_off = true; /* * The firmware might enable the clock at boot (this information * may or may not be reflected in the enable clock register). * To change the rate we must disable the clock first to cover these * cases. Due to common clock framework restrictions that do not allow * to disable a clock that has not been enabled, we need to enable * the clock first. */ ret = clk_prepare_enable(priv->mclk); if (!ret) clk_disable_unprepare(priv->mclk); ret = clk_set_rate(priv->mclk, 19200000); if (ret) dev_err(card->dev, "unable to set MCLK rate\n"); ret = clk_prepare_enable(priv->mclk); if (ret) dev_err(card->dev, "unable to enable MCLK\n"); ret = snd_soc_dai_set_sysclk(runtime->codec_dai, 0, 19200000, SND_SOC_CLOCK_IN); if (ret < 0) { dev_err(card->dev, "can't set codec clock %d\n", ret); return ret; } return 0; } static const struct snd_soc_pcm_stream byt_cht_es8316_dai_params = { .formats = SNDRV_PCM_FMTBIT_S24_LE, .rate_min = 48000, .rate_max = 48000, .channels_min = 2, .channels_max = 2, }; static int byt_cht_es8316_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 covert the FE rate to 48k, stereo */ 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 int byt_cht_es8316_aif1_startup(struct snd_pcm_substream *substream) { return snd_pcm_hw_constraint_single(substream->runtime, SNDRV_PCM_HW_PARAM_RATE, 48000); } static const struct snd_soc_ops byt_cht_es8316_aif1_ops = { .startup = byt_cht_es8316_aif1_startup, }; static struct snd_soc_dai_link byt_cht_es8316_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", .nonatomic = true, .dynamic = 1, .dpcm_playback = 1, .dpcm_capture = 1, .ops = &byt_cht_es8316_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", .nonatomic = true, .dynamic = 1, .dpcm_playback = 1, .ops = &byt_cht_es8316_aif1_ops, }, /* back ends */ { /* Only SSP2 has been tested here, so BYT-CR platforms that * require SSP0 will not work. */ .name = "SSP2-Codec", .id = 0, .cpu_dai_name = "ssp2-port", .platform_name = "sst-mfld-platform", .no_pcm = 1, .codec_dai_name = "ES8316 HiFi", .codec_name = "i2c-ESSX8316:00", .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS, .be_hw_params_fixup = byt_cht_es8316_codec_fixup, .nonatomic = true, .dpcm_playback = 1, .dpcm_capture = 1, .init = byt_cht_es8316_init, }, }; /* SoC card */ static struct snd_soc_card byt_cht_es8316_card = { .name = "bytcht-es8316", .owner = THIS_MODULE, .dai_link = byt_cht_es8316_dais, .num_links = ARRAY_SIZE(byt_cht_es8316_dais), .dapm_widgets = byt_cht_es8316_widgets, .num_dapm_widgets = ARRAY_SIZE(byt_cht_es8316_widgets), .dapm_routes = byt_cht_es8316_audio_map, .num_dapm_routes = ARRAY_SIZE(byt_cht_es8316_audio_map), .controls = byt_cht_es8316_controls, .num_controls = ARRAY_SIZE(byt_cht_es8316_controls), .fully_routed = true, }; static char codec_name[SND_ACPI_I2C_ID_LEN]; static int snd_byt_cht_es8316_mc_probe(struct platform_device *pdev) { struct byt_cht_es8316_private *priv; struct snd_soc_acpi_mach *mach; const char *i2c_name = NULL; int dai_index = 0; int i; int ret = 0; priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_ATOMIC); if (!priv) return -ENOMEM; mach = (&pdev->dev)->platform_data; /* fix index of codec dai */ for (i = 0; i < ARRAY_SIZE(byt_cht_es8316_dais); i++) { if (!strcmp(byt_cht_es8316_dais[i].codec_name, "i2c-ESSX8316:00")) { dai_index = i; break; } } /* fixup codec name based on HID */ i2c_name = snd_soc_acpi_find_name_from_hid(mach->id); if (i2c_name) { snprintf(codec_name, sizeof(codec_name), "%s%s", "i2c-", i2c_name); byt_cht_es8316_dais[dai_index].codec_name = codec_name; } /* register the soc card */ byt_cht_es8316_card.dev = &pdev->dev; snd_soc_card_set_drvdata(&byt_cht_es8316_card, priv); priv->mclk = devm_clk_get(&pdev->dev, "pmc_plt_clk_3"); if (IS_ERR(priv->mclk)) { ret = PTR_ERR(priv->mclk); dev_err(&pdev->dev, "Failed to get MCLK from pmc_plt_clk_3: %d\n", ret); return ret; } ret = devm_snd_soc_register_card(&pdev->dev, &byt_cht_es8316_card); if (ret) { dev_err(&pdev->dev, "snd_soc_register_card failed %d\n", ret); return ret; } platform_set_drvdata(pdev, &byt_cht_es8316_card); return ret; } static struct platform_driver snd_byt_cht_es8316_mc_driver = { .driver = { .name = "bytcht_es8316", }, .probe = snd_byt_cht_es8316_mc_probe, }; module_platform_driver(snd_byt_cht_es8316_mc_driver); MODULE_DESCRIPTION("ASoC Intel(R) Baytrail/Cherrytrail Machine driver"); MODULE_AUTHOR("David Yang "); MODULE_LICENSE("GPL v2"); MODULE_ALIAS("platform:bytcht_es8316");