linux/sound/soc/intel/boards/cht_bsw_nau8824.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 *  cht-bsw-nau8824.c - ASoc Machine driver for Intel Cherryview-based
 *          platforms Cherrytrail and Braswell, with nau8824 codec.
 *
 *  Copyright (C) 2018 Intel Corp
 *  Copyright (C) 2018 Nuvoton Technology Corp
 *
 *  Author: Wang, Joseph C <joequant@gmail.com>
 *  Co-author: John Hsu <KCHSU0@nuvoton.com>
 *  This file is based on cht_bsw_rt5672.c and cht-bsw-max98090.c
 */

#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/soc-acpi.h>
#include <sound/jack.h>
#include <linux/input.h>
#include "../atom/sst-atom-controls.h"
#include "../../codecs/nau8824.h"

struct cht_mc_private {
	struct snd_soc_jack jack;
};

static struct snd_soc_jack_pin cht_bsw_jack_pins[] = {
	{
		.pin = "Headphone",
		.mask = SND_JACK_HEADPHONE,
	},
	{
		.pin = "Headset Mic",
		.mask = SND_JACK_MICROPHONE,
	},
};

static const struct snd_soc_dapm_widget cht_dapm_widgets[] = {
	SND_SOC_DAPM_HP("Headphone", NULL),
	SND_SOC_DAPM_MIC("Headset Mic", NULL),
	SND_SOC_DAPM_MIC("Int Mic", NULL),
	SND_SOC_DAPM_SPK("Ext Spk", NULL),
};

static const struct snd_soc_dapm_route cht_audio_map[] = {
	{"Ext Spk", NULL, "SPKOUTL"},
	{"Ext Spk", NULL, "SPKOUTR"},
	{"Headphone", NULL, "HPOL"},
	{"Headphone", NULL, "HPOR"},
	{"MIC1", NULL, "Int Mic"},
	{"MIC2", NULL, "Int Mic"},
	{"HSMIC1", NULL, "Headset Mic"},
	{"HSMIC2", NULL, "Headset Mic"},
	{"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 cht_mc_controls[] = {
	SOC_DAPM_PIN_SWITCH("Headphone"),
	SOC_DAPM_PIN_SWITCH("Headset Mic"),
	SOC_DAPM_PIN_SWITCH("Int Mic"),
	SOC_DAPM_PIN_SWITCH("Ext Spk"),
};

static int cht_aif1_hw_params(struct snd_pcm_substream *substream,
	struct snd_pcm_hw_params *params)
{
	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
	struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
	int ret;

	ret = snd_soc_dai_set_sysclk(codec_dai, NAU8824_CLK_FLL_FS, 0,
		SND_SOC_CLOCK_IN);
	if (ret < 0) {
		dev_err(codec_dai->dev, "can't set FS clock %d\n", ret);
		return ret;
	}
	ret = snd_soc_dai_set_pll(codec_dai, 0, 0, params_rate(params),
		params_rate(params) * 256);
	if (ret < 0) {
		dev_err(codec_dai->dev, "can't set FLL: %d\n", ret);
		return ret;
	}

	return 0;
}

static int cht_codec_init(struct snd_soc_pcm_runtime *runtime)
{
	struct cht_mc_private *ctx = snd_soc_card_get_drvdata(runtime->card);
	struct snd_soc_jack *jack = &ctx->jack;
	struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(runtime, 0);
	struct snd_soc_component *component = codec_dai->component;
	int ret, jack_type;

	/* NAU88L24 supports 4 buttons headset detection
	 * KEY_PLAYPAUSE
	 * KEY_VOICECOMMAND
	 * KEY_VOLUMEUP
	 * KEY_VOLUMEDOWN
	 */
	jack_type = SND_JACK_HEADSET | SND_JACK_BTN_0 | SND_JACK_BTN_1 |
		SND_JACK_BTN_2 | SND_JACK_BTN_3;
	ret = snd_soc_card_jack_new_pins(runtime->card, "Headset", jack_type,
		jack, cht_bsw_jack_pins, ARRAY_SIZE(cht_bsw_jack_pins));
	if (ret) {
		dev_err(runtime->dev,
			"Headset Jack creation failed %d\n", ret);
		return ret;
	}
	snd_jack_set_key(jack->jack, SND_JACK_BTN_0, KEY_PLAYPAUSE);
	snd_jack_set_key(jack->jack, SND_JACK_BTN_1, KEY_VOICECOMMAND);
	snd_jack_set_key(jack->jack, SND_JACK_BTN_2, KEY_VOLUMEUP);
	snd_jack_set_key(jack->jack, SND_JACK_BTN_3, KEY_VOLUMEDOWN);

	nau8824_enable_jack_detect(component, jack);

	return ret;
}

static int cht_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);
	struct snd_mask *fmt =
		hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
	int ret;

	/* The DSP will covert the FE rate to 48k, stereo, 24bits */
	rate->min = rate->max = 48000;
	channels->min = channels->max = 2;

	/* set SSP2 to 24-bit */
	snd_mask_none(fmt);
	params_set_format(params, SNDRV_PCM_FORMAT_S24_LE);

	/* TDM 4 slots 24 bit, set Rx & Tx bitmask to 4 active slots */
	ret = snd_soc_dai_set_tdm_slot(asoc_rtd_to_codec(rtd, 0), 0xf, 0x1, 4, 24);
	if (ret < 0) {
		dev_err(rtd->dev, "can't set codec TDM slot %d\n", ret);
		return ret;
	}

	return 0;
}

static int cht_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 cht_aif1_ops = {
	.startup = cht_aif1_startup,
};

static const struct snd_soc_ops cht_be_ssp2_ops = {
	.hw_params = cht_aif1_hw_params,
};

SND_SOC_DAILINK_DEF(dummy,
	DAILINK_COMP_ARRAY(COMP_DUMMY()));

SND_SOC_DAILINK_DEF(media,
	DAILINK_COMP_ARRAY(COMP_CPU("media-cpu-dai")));

SND_SOC_DAILINK_DEF(deepbuffer,
	DAILINK_COMP_ARRAY(COMP_CPU("deepbuffer-cpu-dai")));

SND_SOC_DAILINK_DEF(ssp2_port,
	DAILINK_COMP_ARRAY(COMP_CPU("ssp2-port")));
SND_SOC_DAILINK_DEF(ssp2_codec,
	DAILINK_COMP_ARRAY(COMP_CODEC("i2c-10508824:00",
				      NAU8824_CODEC_DAI)));

SND_SOC_DAILINK_DEF(platform,
	DAILINK_COMP_ARRAY(COMP_PLATFORM("sst-mfld-platform")));

static struct snd_soc_dai_link cht_dailink[] = {
	/* Front End DAI links */
	[MERR_DPCM_AUDIO] = {
		.name = "Audio Port",
		.stream_name = "Audio",
		.nonatomic = true,
		.dynamic = 1,
		.dpcm_playback = 1,
		.dpcm_capture = 1,
		.ops = &cht_aif1_ops,
		SND_SOC_DAILINK_REG(media, dummy, platform),
	},
	[MERR_DPCM_DEEP_BUFFER] = {
		.name = "Deep-Buffer Audio Port",
		.stream_name = "Deep-Buffer Audio",
		.nonatomic = true,
		.dynamic = 1,
		.dpcm_playback = 1,
		.ops = &cht_aif1_ops,
		SND_SOC_DAILINK_REG(deepbuffer, dummy, platform),
	},
	/* Back End DAI links */
	{
		/* SSP2 - Codec */
		.name = "SSP2-Codec",
		.id = 0,
		.no_pcm = 1,
		.dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_IB_NF
			| SND_SOC_DAIFMT_CBC_CFC,
		.init = cht_codec_init,
		.be_hw_params_fixup = cht_codec_fixup,
		.dpcm_playback = 1,
		.dpcm_capture = 1,
		.ops = &cht_be_ssp2_ops,
		SND_SOC_DAILINK_REG(ssp2_port, ssp2_codec, platform),
	},
};

/* use space before codec name to simplify card ID, and simplify driver name */
#define SOF_CARD_NAME "bytcht nau8824" /* card name will be 'sof-bytcht nau8824 */
#define SOF_DRIVER_NAME "SOF"

#define CARD_NAME "chtnau8824"
#define DRIVER_NAME NULL /* card name will be used for driver name */

/* SoC card */
static struct snd_soc_card snd_soc_card_cht = {
	.owner = THIS_MODULE,
	.dai_link = cht_dailink,
	.num_links = ARRAY_SIZE(cht_dailink),
	.dapm_widgets = cht_dapm_widgets,
	.num_dapm_widgets = ARRAY_SIZE(cht_dapm_widgets),
	.dapm_routes = cht_audio_map,
	.num_dapm_routes = ARRAY_SIZE(cht_audio_map),
	.controls = cht_mc_controls,
	.num_controls = ARRAY_SIZE(cht_mc_controls),
};

static int snd_cht_mc_probe(struct platform_device *pdev)
{
	struct cht_mc_private *drv;
	struct snd_soc_acpi_mach *mach;
	const char *platform_name;
	bool sof_parent;
	int ret_val;

	drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_KERNEL);
	if (!drv)
		return -ENOMEM;
	snd_soc_card_set_drvdata(&snd_soc_card_cht, drv);

	/* override platform name, if required */
	snd_soc_card_cht.dev = &pdev->dev;
	mach = pdev->dev.platform_data;
	platform_name = mach->mach_params.platform;

	ret_val = snd_soc_fixup_dai_links_platform_name(&snd_soc_card_cht,
							platform_name);
	if (ret_val)
		return ret_val;

	sof_parent = snd_soc_acpi_sof_parent(&pdev->dev);

	/* set card and driver name */
	if (sof_parent) {
		snd_soc_card_cht.name = SOF_CARD_NAME;
		snd_soc_card_cht.driver_name = SOF_DRIVER_NAME;
	} else {
		snd_soc_card_cht.name = CARD_NAME;
		snd_soc_card_cht.driver_name = DRIVER_NAME;
	}

	snd_soc_card_cht.components = nau8824_components();

	/* set pm ops */
	if (sof_parent)
		pdev->dev.driver->pm = &snd_soc_pm_ops;

	/* register the soc card */
	ret_val = devm_snd_soc_register_card(&pdev->dev, &snd_soc_card_cht);
	if (ret_val) {
		dev_err(&pdev->dev,
			"snd_soc_register_card failed %d\n", ret_val);
		return ret_val;
	}
	platform_set_drvdata(pdev, &snd_soc_card_cht);

	return ret_val;
}

static struct platform_driver snd_cht_mc_driver = {
	.driver = {
		.name = "cht-bsw-nau8824",
	},
	.probe = snd_cht_mc_probe,
};

module_platform_driver(snd_cht_mc_driver);

MODULE_DESCRIPTION("ASoC Intel(R) Baytrail CR Machine driver");
MODULE_AUTHOR("Wang, Joseph C <joequant@gmail.com>");
MODULE_AUTHOR("John Hsu <KCHSU0@nuvoton.com>");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:cht-bsw-nau8824");