1. 根目录:
2. sound
3. soc
4. intel
5. boards
6. cht_bsw_max98090_ti.c

/*
 *  cht-bsw-max98090.c - ASoc Machine driver for Intel Cherryview-based
 *  platforms Cherrytrail and Braswell, with max98090 & TI codec.
 *
 *  Copyright (C) 2015 Intel Corp
 *  Author: Fang, Yang A <yang.a.fang@intel.com>
 *  This file is modified from cht_bsw_rt5645.c
 *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 *  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/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/acpi.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/jack.h>
#include "../../codecs/max98090.h"
#include "../atom/sst-atom-controls.h"
#include "../../codecs/ts3a227e.h"

#define CHT_PLAT_CLK_3_HZ	19200000
#define CHT_CODEC_DAI	"HiFi"

struct cht_mc_private {
	struct snd_soc_jack jack;
	bool ts3a227e_present;
};

static inline struct snd_soc_dai *cht_get_codec_dai(struct snd_soc_card *card)
{
	int i;

	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_pcm_runtime *rtd;

		rtd = card->rtd + i;
		if (!strncmp(rtd->codec_dai->name, CHT_CODEC_DAI,
			     strlen(CHT_CODEC_DAI)))
			return rtd->codec_dai;
	}
	return NULL;
}

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[] = {
	{"IN34", NULL, "Headset Mic"},
	{"Headset Mic", NULL, "MICBIAS"},
	{"DMICL", NULL, "Int Mic"},
	{"Headphone", NULL, "HPL"},
	{"Headphone", NULL, "HPR"},
	{"Ext Spk", NULL, "SPKL"},
	{"Ext Spk", NULL, "SPKR"},
	{"HiFi 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, "HiFi 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 = substream->private_data;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
	int ret;

	ret = snd_soc_dai_set_sysclk(codec_dai, M98090_REG_SYSTEM_CLOCK,
				     CHT_PLAT_CLK_3_HZ, SND_SOC_CLOCK_IN);
	if (ret < 0) {
		dev_err(rtd->dev, "can't set codec sysclk: %d\n", ret);
		return ret;
	}

	return 0;
}

static int cht_ti_jack_event(struct notifier_block *nb,
		unsigned long event, void *data)
{
	struct snd_soc_jack *jack = (struct snd_soc_jack *)data;
	struct snd_soc_dapm_context *dapm = &jack->card->dapm;

	if (event & SND_JACK_MICROPHONE) {
		snd_soc_dapm_force_enable_pin(dapm, "SHDN");
		snd_soc_dapm_force_enable_pin(dapm, "MICBIAS");
		snd_soc_dapm_sync(dapm);
	} else {
		snd_soc_dapm_disable_pin(dapm, "MICBIAS");
		snd_soc_dapm_disable_pin(dapm, "SHDN");
		snd_soc_dapm_sync(dapm);
	}

	return 0;
}

static struct notifier_block cht_jack_nb = {
	.notifier_call = cht_ti_jack_event,
};

static int cht_codec_init(struct snd_soc_pcm_runtime *runtime)
{
	int ret;
	int jack_type;
	struct cht_mc_private *ctx = snd_soc_card_get_drvdata(runtime->card);
	struct snd_soc_jack *jack = &ctx->jack;

	/**
	* TI supports 4 butons headset detection
	* KEY_MEDIA
	* KEY_VOICECOMMAND
	* KEY_VOLUMEUP
	* KEY_VOLUMEDOWN
	*/
	if (ctx->ts3a227e_present)
		jack_type = SND_JACK_HEADPHONE | SND_JACK_MICROPHONE |
					SND_JACK_BTN_0 | SND_JACK_BTN_1 |
					SND_JACK_BTN_2 | SND_JACK_BTN_3;
	else
		jack_type = SND_JACK_HEADPHONE | SND_JACK_MICROPHONE;

	ret = snd_soc_card_jack_new(runtime->card, "Headset Jack",
					jack_type, jack, NULL, 0);

	if (ret) {
		dev_err(runtime->dev, "Headset Jack creation failed %d\n", ret);
		return ret;
	}

	if (ctx->ts3a227e_present)
		snd_soc_jack_notifier_register(jack, &cht_jack_nb);

	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);
	int ret = 0;
	unsigned int fmt = 0;

	ret = snd_soc_dai_set_tdm_slot(rtd->cpu_dai, 0x3, 0x3, 2, 16);
	if (ret < 0) {
		dev_err(rtd->dev, "can't set cpu_dai slot fmt: %d\n", ret);
		return ret;
	}

	fmt = SND_SOC_DAIFMT_LEFT_J | SND_SOC_DAIFMT_NB_NF
				| SND_SOC_DAIFMT_CBS_CFS;

	ret = snd_soc_dai_set_fmt(rtd->cpu_dai, fmt);
	if (ret < 0) {
		dev_err(rtd->dev, "can't set cpu_dai set fmt: %d\n", ret);
		return 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 */
	params_set_format(params, SNDRV_PCM_FORMAT_S24_LE);
	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 int cht_max98090_headset_init(struct snd_soc_component *component)
{
	struct snd_soc_card *card = component->card;
	struct cht_mc_private *ctx = snd_soc_card_get_drvdata(card);

	return ts3a227e_enable_jack_detect(component, &ctx->jack);
}

static struct snd_soc_ops cht_aif1_ops = {
	.startup = cht_aif1_startup,
};

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

static struct snd_soc_aux_dev cht_max98090_headset_dev = {
	.name = "Headset Chip",
	.init = cht_max98090_headset_init,
	.codec_name = "i2c-104C227E:00",
};

static struct snd_soc_dai_link cht_dailink[] = {
	[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 = &cht_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 */
	{
		.name = "SSP2-Codec",
		.be_id = 1,
		.cpu_dai_name = "ssp2-port",
		.platform_name = "sst-mfld-platform",
		.no_pcm = 1,
		.codec_dai_name = "HiFi",
		.codec_name = "i2c-193C9890:00",
		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
					| SND_SOC_DAIFMT_CBS_CFS,
		.init = cht_codec_init,
		.be_hw_params_fixup = cht_codec_fixup,
		.dpcm_playback = 1,
		.dpcm_capture = 1,
		.ops = &cht_be_ssp2_ops,
	},
};

/* SoC card */
static struct snd_soc_card snd_soc_card_cht = {
	.name = "chtmax98090",
	.owner = THIS_MODULE,
	.dai_link = cht_dailink,
	.num_links = ARRAY_SIZE(cht_dailink),
	.aux_dev = &cht_max98090_headset_dev,
	.num_aux_devs = 1,
	.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 acpi_status snd_acpi_codec_match(acpi_handle handle, u32 level,
						void *context, void **ret)
{
	*(bool *)context = true;
	return AE_OK;
}

static int snd_cht_mc_probe(struct platform_device *pdev)
{
	int ret_val = 0;
	bool found = false;
	struct cht_mc_private *drv;

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

	if (ACPI_SUCCESS(acpi_get_devices(
					"104C227E",
					snd_acpi_codec_match,
					&found, NULL)) && found) {
		drv->ts3a227e_present = true;
	} else {
		/* no need probe TI jack detection chip */
		snd_soc_card_cht.aux_dev = NULL;
		snd_soc_card_cht.num_aux_devs = 0;
		drv->ts3a227e_present = false;
	}

	/* register the soc card */
	snd_soc_card_cht.dev = &pdev->dev;
	snd_soc_card_set_drvdata(&snd_soc_card_cht, drv);
	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-max98090",
	},
	.probe = snd_cht_mc_probe,
};

module_platform_driver(snd_cht_mc_driver)

MODULE_DESCRIPTION("ASoC Intel(R) Braswell Machine driver");
MODULE_AUTHOR("Fang, Yang A <yang.a.fang@intel.com>");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:cht-bsw-max98090");