--- /dev/null
+/*
+ * 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");
projects / karo-tx-linux.git / commitdiff