diff options
Diffstat (limited to 'sound/soc/intel/boards/bytcht_es8316.c')
-rw-r--r-- | sound/soc/intel/boards/bytcht_es8316.c | 300 |
1 files changed, 300 insertions, 0 deletions
diff --git a/sound/soc/intel/boards/bytcht_es8316.c b/sound/soc/intel/boards/bytcht_es8316.c new file mode 100644 index 0000000..5263546 --- /dev/null +++ b/sound/soc/intel/boards/bytcht_es8316.c @@ -0,0 +1,300 @@ +/* + * bytcht_es8316.c - ASoc Machine driver for Intel Baytrail/Cherrytrail + * platforms with Everest ES8316 SoC + * + * Copyright (C) 2017 Endless Mobile, Inc. + * Authors: David Yang <yangxiaohua@everest-semi.com>, + * Daniel Drake <drake@endlessm.com> + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * + * 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 <linux/init.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/device.h> +#include <linux/slab.h> +#include <asm/platform_sst_audio.h> +#include <linux/clk.h> +#include <sound/pcm.h> +#include <sound/pcm_params.h> +#include <sound/soc.h> +#include "../atom/sst-atom-controls.h" +#include "../common/sst-acpi.h" +#include "../common/sst-dsp.h" + +struct byt_cht_es8316_private { + struct clk *mclk; +}; + +#define CODEC_DAI1 "ES8316 HiFi" + +static inline struct snd_soc_dai *get_codec_dai(struct snd_soc_card *card) +{ + struct snd_soc_pcm_runtime *rtd; + + list_for_each_entry(rtd, &card->rtd_list, list) { + if (!strncmp(rtd->codec_dai->name, CODEC_DAI1, + strlen(CODEC_DAI1))) + return rtd->codec_dai; + } + return NULL; +} + +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, + }, + + [MERR_DPCM_COMPR] = { + .name = "Compressed Port", + .stream_name = "Compress", + .cpu_dai_name = "compress-cpu-dai", + .codec_dai_name = "snd-soc-dummy-dai", + .codec_name = "snd-soc-dummy", + .platform_name = "sst-mfld-platform", + }, + + /* back ends */ + { + /* Only SSP2 has been tested here, so BYT-CR platforms that + * require SSP0 will not work. + */ + .name = "SSP2-Codec", + .id = 1, + .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 int snd_byt_cht_es8316_mc_probe(struct platform_device *pdev) +{ + int ret = 0; + struct byt_cht_es8316_private *priv; + + priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_ATOMIC); + if (!priv) + return -ENOMEM; + + /* 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 <yangxiaohua@everest-semi.com>"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:bytcht_es8316"); |