omap-abe-twl6040.c 9.23 KB
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/*
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 * omap-abe-twl6040.c  --  SoC audio for TI OMAP based boards with ABE and
 *			   twl6040 codec
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 *
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 * Author: Misael Lopez Cruz <misael.lopez@ti.com>
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 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA
 *
 */

#include <linux/clk.h>
#include <linux/platform_device.h>
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#include <linux/mfd/twl6040.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
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#include <sound/jack.h>
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#include "omap-dmic.h"
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#include "omap-mcpdm.h"
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#include "../codecs/twl6040.h"

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

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struct platform_device *dmic_codec_dev;

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static int omap_abe_hw_params(struct snd_pcm_substream *substream,
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	struct snd_pcm_hw_params *params)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
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	struct snd_soc_dai *codec_dai = rtd->codec_dai;
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	struct snd_soc_card *card = rtd->card;
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	struct abe_twl6040 *priv = snd_soc_card_get_drvdata(card);
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	int clk_id, freq;
	int ret;

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	clk_id = twl6040_get_clk_id(rtd->codec);
	if (clk_id == TWL6040_SYSCLK_SEL_HPPLL)
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		freq = priv->mclk_freq;
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	else if (clk_id == TWL6040_SYSCLK_SEL_LPPLL)
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		freq = 32768;
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	else
		return -EINVAL;
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	/* 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;
	}
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	return ret;
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}

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

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static int omap_abe_dmic_hw_params(struct snd_pcm_substream *substream,
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	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;
}

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

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/* 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,
	},
};

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/* SDP4430 machine DAPM */
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static const struct snd_soc_dapm_widget twl6040_dapm_widgets[] = {
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	/* Outputs */
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	SND_SOC_DAPM_HP("Headset Stereophone", NULL),
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	SND_SOC_DAPM_SPK("Earphone Spk", NULL),
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	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),
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	/* Digital microphones */
	SND_SOC_DAPM_MIC("Digital Mic", NULL),
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};

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

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

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

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

	/* Routings for inputs */
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	{"HSMIC", NULL, "Headset Mic"},
	{"Headset Mic", NULL, "Headset Mic Bias"},
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	{"MAINMIC", NULL, "Main Handset Mic"},
	{"Main Handset Mic", NULL, "Main Mic Bias"},
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	{"SUBMIC", NULL, "Sub Handset Mic"},
	{"Sub Handset Mic", NULL, "Main Mic Bias"},
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	{"AFML", NULL, "Line In"},
	{"AFMR", NULL, "Line In"},
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};

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

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

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	/* Headset jack detection only if it is supported */
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	if (priv->jack_detection) {
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		ret = snd_soc_card_jack_new(rtd->card, "Headset Jack",
					    SND_JACK_HEADSET, &hs_jack,
					    hs_jack_pins,
					    ARRAY_SIZE(hs_jack_pins));
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		if (ret)
			return ret;
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		twl6040_hs_jack_detect(codec, &hs_jack, SND_JACK_HEADSET);
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	}
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	return 0;
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}

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

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static int omap_abe_dmic_init(struct snd_soc_pcm_runtime *rtd)
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{
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	struct snd_soc_dapm_context *dapm = &rtd->card->dapm;
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	return snd_soc_dapm_add_routes(dapm, dmic_audio_map,
				ARRAY_SIZE(dmic_audio_map));
}

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static int omap_abe_probe(struct platform_device *pdev)
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{
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	struct device_node *node = pdev->dev.of_node;
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	struct snd_soc_card *card;
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	struct device_node *dai_node;
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	struct abe_twl6040 *priv;
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	int num_links = 0;
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	int ret = 0;
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	if (!node) {
		dev_err(&pdev->dev, "of node is missing.\n");
		return -ENODEV;
	}

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

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	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);

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	if (snd_soc_of_parse_card_name(card, "ti,model")) {
		dev_err(&pdev->dev, "Card name is not provided\n");
		return -ENODEV;
	}
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	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;
	}
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	dai_node = of_parse_phandle(node, "ti,mcpdm", 0);
	if (!dai_node) {
		dev_err(&pdev->dev, "McPDM node is not provided\n");
		return -EINVAL;
	}
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	priv->dai_links[0].name = "DMIC";
	priv->dai_links[0].stream_name = "TWL6040";
	priv->dai_links[0].cpu_of_node = dai_node;
	priv->dai_links[0].platform_of_node = dai_node;
	priv->dai_links[0].codec_dai_name = "twl6040-legacy";
	priv->dai_links[0].codec_name = "twl6040-codec";
	priv->dai_links[0].init = omap_abe_twl6040_init;
	priv->dai_links[0].ops = &omap_abe_ops;
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	dai_node = of_parse_phandle(node, "ti,dmic", 0);
	if (dai_node) {
		num_links = 2;
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		priv->dai_links[1].name = "TWL6040";
		priv->dai_links[1].stream_name = "DMIC Capture";
		priv->dai_links[1].cpu_of_node = dai_node;
		priv->dai_links[1].platform_of_node = dai_node;
		priv->dai_links[1].codec_dai_name = "dmic-hifi";
		priv->dai_links[1].codec_name = "dmic-codec";
		priv->dai_links[1].init = omap_abe_dmic_init;
		priv->dai_links[1].ops = &omap_abe_dmic_ops;
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	} else {
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		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");
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		return -EINVAL;
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	}
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	card->fully_routed = 1;
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	if (!priv->mclk_freq) {
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		dev_err(&pdev->dev, "MCLK frequency missing\n");
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		return -ENODEV;
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	}

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	card->dai_link = priv->dai_links;
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	card->num_links = num_links;
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	snd_soc_card_set_drvdata(card, priv);

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

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

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

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