alistair23-linux/sound/soc/ti/omap-abe-twl6040.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * omap-abe-twl6040.c  --  SoC audio for TI OMAP based boards with ABE and
 *			   twl6040 codec
 *
 * Author: Misael Lopez Cruz <misael.lopez@ti.com>
 */

#include <linux/clk.h>
#include <linux/platform_device.h>
#include <linux/mfd/twl6040.h>
#include <linux/module.h>
#include <linux/of.h>

#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <sound/jack.h>

#include "omap-dmic.h"
#include "omap-mcpdm.h"
#include "../codecs/twl6040.h"

SND_SOC_DAILINK_DEFS(link0,
	DAILINK_COMP_ARRAY(COMP_EMPTY()),
	DAILINK_COMP_ARRAY(COMP_CODEC("twl6040-codec",
				      "twl6040-legacy")),
	DAILINK_COMP_ARRAY(COMP_EMPTY()));

SND_SOC_DAILINK_DEFS(link1,
	DAILINK_COMP_ARRAY(COMP_EMPTY()),
	DAILINK_COMP_ARRAY(COMP_CODEC("dmic-codec",
				      "dmic-hifi")),
	DAILINK_COMP_ARRAY(COMP_EMPTY()));

struct abe_twl6040 {
	struct snd_soc_card card;
	struct snd_soc_dai_link dai_links[2];
	int	jack_detection;	/* board can detect jack events */
	int	mclk_freq;	/* MCLK frequency speed for twl6040 */
};

static struct platform_device *dmic_codec_dev;

static int omap_abe_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;
	struct snd_soc_card *card = rtd->card;
	struct abe_twl6040 *priv = snd_soc_card_get_drvdata(card);
	int clk_id, freq;
	int ret;

	clk_id = twl6040_get_clk_id(codec_dai->component);
	if (clk_id == TWL6040_SYSCLK_SEL_HPPLL)
		freq = priv->mclk_freq;
	else if (clk_id == TWL6040_SYSCLK_SEL_LPPLL)
		freq = 32768;
	else
		return -EINVAL;

	/* set the codec mclk */
	ret = snd_soc_dai_set_sysclk(codec_dai, clk_id, freq,
				SND_SOC_CLOCK_IN);
	if (ret) {
		printk(KERN_ERR "can't set codec system clock\n");
		return ret;
	}
	return ret;
}

static const struct snd_soc_ops omap_abe_ops = {
	.hw_params = omap_abe_hw_params,
};

static int omap_abe_dmic_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 *cpu_dai = rtd->cpu_dai;
	int ret = 0;

	ret = snd_soc_dai_set_sysclk(cpu_dai, OMAP_DMIC_SYSCLK_PAD_CLKS,
				     19200000, SND_SOC_CLOCK_IN);
	if (ret < 0) {
		printk(KERN_ERR "can't set DMIC cpu system clock\n");
		return ret;
	}
	ret = snd_soc_dai_set_sysclk(cpu_dai, OMAP_DMIC_ABE_DMIC_CLK, 2400000,
				     SND_SOC_CLOCK_OUT);
	if (ret < 0) {
		printk(KERN_ERR "can't set DMIC output clock\n");
		return ret;
	}
	return 0;
}

static struct snd_soc_ops omap_abe_dmic_ops = {
	.hw_params = omap_abe_dmic_hw_params,
};

/* Headset jack */
static struct snd_soc_jack hs_jack;

/*Headset jack detection DAPM pins */
static struct snd_soc_jack_pin hs_jack_pins[] = {
	{
		.pin = "Headset Mic",
		.mask = SND_JACK_MICROPHONE,
	},
	{
		.pin = "Headset Stereophone",
		.mask = SND_JACK_HEADPHONE,
	},
};

/* SDP4430 machine DAPM */
static const struct snd_soc_dapm_widget twl6040_dapm_widgets[] = {
	/* Outputs */
	SND_SOC_DAPM_HP("Headset Stereophone", NULL),
	SND_SOC_DAPM_SPK("Earphone Spk", NULL),
	SND_SOC_DAPM_SPK("Ext Spk", NULL),
	SND_SOC_DAPM_LINE("Line Out", NULL),
	SND_SOC_DAPM_SPK("Vibrator", NULL),

	/* Inputs */
	SND_SOC_DAPM_MIC("Headset Mic", NULL),
	SND_SOC_DAPM_MIC("Main Handset Mic", NULL),
	SND_SOC_DAPM_MIC("Sub Handset Mic", NULL),
	SND_SOC_DAPM_LINE("Line In", NULL),

	/* Digital microphones */
	SND_SOC_DAPM_MIC("Digital Mic", NULL),
};

static const struct snd_soc_dapm_route audio_map[] = {
	/* Routings for outputs */
	{"Headset Stereophone", NULL, "HSOL"},
	{"Headset Stereophone", NULL, "HSOR"},

	{"Earphone Spk", NULL, "EP"},

	{"Ext Spk", NULL, "HFL"},
	{"Ext Spk", NULL, "HFR"},

	{"Line Out", NULL, "AUXL"},
	{"Line Out", NULL, "AUXR"},

	{"Vibrator", NULL, "VIBRAL"},
	{"Vibrator", NULL, "VIBRAR"},

	/* Routings for inputs */
	{"HSMIC", NULL, "Headset Mic"},
	{"Headset Mic", NULL, "Headset Mic Bias"},

	{"MAINMIC", NULL, "Main Handset Mic"},
	{"Main Handset Mic", NULL, "Main Mic Bias"},

	{"SUBMIC", NULL, "Sub Handset Mic"},
	{"Sub Handset Mic", NULL, "Main Mic Bias"},

	{"AFML", NULL, "Line In"},
	{"AFMR", NULL, "Line In"},
};

static int omap_abe_twl6040_init(struct snd_soc_pcm_runtime *rtd)
{
	struct snd_soc_component *component = rtd->codec_dai->component;
	struct snd_soc_card *card = rtd->card;
	struct abe_twl6040 *priv = snd_soc_card_get_drvdata(card);
	int hs_trim;
	int ret = 0;

	/*
	 * Configure McPDM offset cancellation based on the HSOTRIM value from
	 * twl6040.
	 */
	hs_trim = twl6040_get_trim_value(component, TWL6040_TRIM_HSOTRIM);
	omap_mcpdm_configure_dn_offsets(rtd, TWL6040_HSF_TRIM_LEFT(hs_trim),
					TWL6040_HSF_TRIM_RIGHT(hs_trim));

	/* Headset jack detection only if it is supported */
	if (priv->jack_detection) {
		ret = snd_soc_card_jack_new(rtd->card, "Headset Jack",
					    SND_JACK_HEADSET, &hs_jack,
					    hs_jack_pins,
					    ARRAY_SIZE(hs_jack_pins));
		if (ret)
			return ret;

		twl6040_hs_jack_detect(component, &hs_jack, SND_JACK_HEADSET);
	}

	return 0;
}

static const struct snd_soc_dapm_route dmic_audio_map[] = {
	{"DMic", NULL, "Digital Mic"},
	{"Digital Mic", NULL, "Digital Mic1 Bias"},
};

static int omap_abe_dmic_init(struct snd_soc_pcm_runtime *rtd)
{
	struct snd_soc_dapm_context *dapm = &rtd->card->dapm;

	return snd_soc_dapm_add_routes(dapm, dmic_audio_map,
				ARRAY_SIZE(dmic_audio_map));
}

static int omap_abe_probe(struct platform_device *pdev)
{
	struct device_node *node = pdev->dev.of_node;
	struct snd_soc_card *card;
	struct device_node *dai_node;
	struct abe_twl6040 *priv;
	int num_links = 0;
	int ret = 0;

	if (!node) {
		dev_err(&pdev->dev, "of node is missing.\n");
		return -ENODEV;
	}

	priv = devm_kzalloc(&pdev->dev, sizeof(struct abe_twl6040), GFP_KERNEL);
	if (priv == NULL)
		return -ENOMEM;

	card = &priv->card;
	card->dev = &pdev->dev;
	card->owner = THIS_MODULE;
	card->dapm_widgets = twl6040_dapm_widgets;
	card->num_dapm_widgets = ARRAY_SIZE(twl6040_dapm_widgets);
	card->dapm_routes = audio_map;
	card->num_dapm_routes = ARRAY_SIZE(audio_map);

	if (snd_soc_of_parse_card_name(card, "ti,model")) {
		dev_err(&pdev->dev, "Card name is not provided\n");
		return -ENODEV;
	}

	ret = snd_soc_of_parse_audio_routing(card, "ti,audio-routing");
	if (ret) {
		dev_err(&pdev->dev, "Error while parsing DAPM routing\n");
		return ret;
	}

	dai_node = of_parse_phandle(node, "ti,mcpdm", 0);
	if (!dai_node) {
		dev_err(&pdev->dev, "McPDM node is not provided\n");
		return -EINVAL;
	}

	priv->dai_links[0].name = "DMIC";
	priv->dai_links[0].stream_name = "TWL6040";
	priv->dai_links[0].cpus = link0_cpus;
	priv->dai_links[0].num_cpus = 1;
	priv->dai_links[0].cpus->of_node = dai_node;
	priv->dai_links[0].platforms = link0_platforms;
	priv->dai_links[0].num_platforms = 1;
	priv->dai_links[0].platforms->of_node = dai_node;
	priv->dai_links[0].codecs = link0_codecs;
	priv->dai_links[0].num_codecs = 1;
	priv->dai_links[0].init = omap_abe_twl6040_init;
	priv->dai_links[0].ops = &omap_abe_ops;

	dai_node = of_parse_phandle(node, "ti,dmic", 0);
	if (dai_node) {
		num_links = 2;
		priv->dai_links[1].name = "TWL6040";
		priv->dai_links[1].stream_name = "DMIC Capture";
		priv->dai_links[1].cpus = link1_cpus;
		priv->dai_links[1].num_cpus = 1;
		priv->dai_links[1].cpus->of_node = dai_node;
		priv->dai_links[1].platforms = link1_platforms;
		priv->dai_links[1].num_platforms = 1;
		priv->dai_links[1].platforms->of_node = dai_node;
		priv->dai_links[1].codecs = link1_codecs;
		priv->dai_links[1].num_codecs = 1;
		priv->dai_links[1].init = omap_abe_dmic_init;
		priv->dai_links[1].ops = &omap_abe_dmic_ops;
	} else {
		num_links = 1;
	}

	priv->jack_detection = of_property_read_bool(node, "ti,jack-detection");
	of_property_read_u32(node, "ti,mclk-freq", &priv->mclk_freq);
	if (!priv->mclk_freq) {
		dev_err(&pdev->dev, "MCLK frequency not provided\n");
		return -EINVAL;
	}

	card->fully_routed = 1;

	if (!priv->mclk_freq) {
		dev_err(&pdev->dev, "MCLK frequency missing\n");
		return -ENODEV;
	}

	card->dai_link = priv->dai_links;
	card->num_links = num_links;

	snd_soc_card_set_drvdata(card, priv);

	ret = devm_snd_soc_register_card(&pdev->dev, card);
	if (ret)
		dev_err(&pdev->dev, "devm_snd_soc_register_card() failed: %d\n",
			ret);

	return ret;
}

static const struct of_device_id omap_abe_of_match[] = {
	{.compatible = "ti,abe-twl6040", },
	{ },
};
MODULE_DEVICE_TABLE(of, omap_abe_of_match);

static struct platform_driver omap_abe_driver = {
	.driver = {
		.name = "omap-abe-twl6040",
		.pm = &snd_soc_pm_ops,
		.of_match_table = omap_abe_of_match,
	},
	.probe = omap_abe_probe,
};

static int __init omap_abe_init(void)
{
	int ret;

	dmic_codec_dev = platform_device_register_simple("dmic-codec", -1, NULL,
							 0);
	if (IS_ERR(dmic_codec_dev)) {
		pr_err("%s: dmic-codec device registration failed\n", __func__);
		return PTR_ERR(dmic_codec_dev);
	}

	ret = platform_driver_register(&omap_abe_driver);
	if (ret) {
		pr_err("%s: platform driver registration failed\n", __func__);
		platform_device_unregister(dmic_codec_dev);
	}

	return ret;
}
module_init(omap_abe_init);

static void __exit omap_abe_exit(void)
{
	platform_driver_unregister(&omap_abe_driver);
	platform_device_unregister(dmic_codec_dev);
}
module_exit(omap_abe_exit);

MODULE_AUTHOR("Misael Lopez Cruz <misael.lopez@ti.com>");
MODULE_DESCRIPTION("ALSA SoC for OMAP boards with ABE and twl6040 codec");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:omap-abe-twl6040");