speyside.c

// SPDX-License-Identifier: GPL-2.0+
//
// Speyside audio support
//
// Copyright 2011 Wolfson Microelectronics

#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <sound/jack.h>
#include <linux/gpio/machine.h>
#include <linux/gpio/consumer.h>
#include <linux/module.h>

#include "../codecs/wm8996.h"
#include "../codecs/wm9081.h"

#define MCLK_AUDIO_RATE (512 * 48000)

static int speyside_set_bias_level(struct snd_soc_card *card,
				   struct snd_soc_dapm_context *dapm,
				   enum snd_soc_bias_level level)
{
	struct snd_soc_pcm_runtime *rtd;
	struct snd_soc_dai *codec_dai;
	int ret;

	rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[1]);
	codec_dai = snd_soc_rtd_to_codec(rtd, 0);

	if (snd_soc_dapm_to_dev(dapm) != codec_dai->dev)
		return 0;

	switch (level) {
	case SND_SOC_BIAS_STANDBY:
		ret = snd_soc_dai_set_sysclk(codec_dai, WM8996_SYSCLK_MCLK2,
					     32768, SND_SOC_CLOCK_IN);
		if (ret < 0)
			return ret;

		ret = snd_soc_dai_set_pll(codec_dai, WM8996_FLL_MCLK2,
					  0, 0, 0);
		if (ret < 0) {
			pr_err("Failed to stop FLL\n");
			return ret;
		}
		break;

	default:
		break;
	}

	return 0;
}

static int speyside_set_bias_level_post(struct snd_soc_card *card,
					struct snd_soc_dapm_context *dapm,
					enum snd_soc_bias_level level)
{
	struct snd_soc_pcm_runtime *rtd;
	struct snd_soc_dai *codec_dai;
	int ret;

	rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[1]);
	codec_dai = snd_soc_rtd_to_codec(rtd, 0);

	if (snd_soc_dapm_to_dev(dapm) != codec_dai->dev)
		return 0;

	switch (level) {
	case SND_SOC_BIAS_PREPARE:
		if (snd_soc_dapm_get_bias_level(dapm) == SND_SOC_BIAS_STANDBY) {
			ret = snd_soc_dai_set_pll(codec_dai, 0,
						  WM8996_FLL_MCLK2,
						  32768, MCLK_AUDIO_RATE);
			if (ret < 0) {
				pr_err("Failed to start FLL\n");
				return ret;
			}

			ret = snd_soc_dai_set_sysclk(codec_dai,
						     WM8996_SYSCLK_FLL,
						     MCLK_AUDIO_RATE,
						     SND_SOC_CLOCK_IN);
			if (ret < 0)
				return ret;
		}
		break;

	default:
		break;
	}

	return 0;
}

static struct snd_soc_jack speyside_headset;

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

static struct gpio_desc *speyside_hpsel_gpio;
/* Default the headphone selection to active high */
static int speyside_jack_polarity;

static int speyside_get_micbias(struct snd_soc_dapm_widget *source,
				struct snd_soc_dapm_widget *sink)
{
	if (speyside_jack_polarity && (snd_soc_dapm_widget_name_cmp(source, "MICB1") == 0))
		return 1;
	if (!speyside_jack_polarity && (snd_soc_dapm_widget_name_cmp(source, "MICB2") == 0))
		return 1;

	return 0;
}

static void speyside_set_polarity(struct snd_soc_component *component,
				  int polarity)
{
	speyside_jack_polarity = !polarity;
	gpiod_direction_output(speyside_hpsel_gpio, speyside_jack_polarity);

	/* Re-run DAPM to make sure we're using the correct mic bias */
	snd_soc_dapm_sync(snd_soc_component_to_dapm(component));
}

static int speyside_wm0010_init(struct snd_soc_pcm_runtime *rtd)
{
	struct snd_soc_dai *dai = snd_soc_rtd_to_codec(rtd, 0);
	int ret;

	ret = snd_soc_dai_set_sysclk(dai, 0, MCLK_AUDIO_RATE, 0);
	if (ret < 0)
		return ret;

	return 0;
}

static int speyside_wm8996_init(struct snd_soc_pcm_runtime *rtd)
{
	struct snd_soc_dai *dai = snd_soc_rtd_to_codec(rtd, 0);
	struct snd_soc_component *component = dai->component;
	enum gpiod_flags flags;
	int ret;

	ret = snd_soc_dai_set_sysclk(dai, WM8996_SYSCLK_MCLK2, 32768, 0);
	if (ret < 0)
		return ret;

	if (speyside_jack_polarity)
		flags = GPIOD_OUT_HIGH;
	else
		flags = GPIOD_OUT_LOW;
	speyside_hpsel_gpio = devm_gpiod_get(rtd->card->dev,
					     "hp-sel",
					     flags);
	if (IS_ERR(speyside_hpsel_gpio))
		return PTR_ERR(speyside_hpsel_gpio);

	ret = snd_soc_card_jack_new_pins(rtd->card, "Headset",
					 SND_JACK_LINEOUT | SND_JACK_HEADSET |
					 SND_JACK_BTN_0,
					 &speyside_headset,
					 speyside_headset_pins,
					 ARRAY_SIZE(speyside_headset_pins));
	if (ret)
		return ret;

	wm8996_detect(component, &speyside_headset, speyside_set_polarity);

	return 0;
}

static int speyside_late_probe(struct snd_soc_card *card)
{
	struct snd_soc_dapm_context *dapm = snd_soc_card_to_dapm(card);

	snd_soc_dapm_ignore_suspend(dapm, "Headphone");
	snd_soc_dapm_ignore_suspend(dapm, "Headset Mic");
	snd_soc_dapm_ignore_suspend(dapm, "Main AMIC");
	snd_soc_dapm_ignore_suspend(dapm, "Main DMIC");
	snd_soc_dapm_ignore_suspend(dapm, "Main Speaker");
	snd_soc_dapm_ignore_suspend(dapm, "WM1250 Output");
	snd_soc_dapm_ignore_suspend(dapm, "WM1250 Input");

	return 0;
}

static const struct snd_soc_pcm_stream dsp_codec_params = {
	.formats = SNDRV_PCM_FMTBIT_S32_LE,
	.rate_min = 48000,
	.rate_max = 48000,
	.channels_min = 2,
	.channels_max = 2,
};

SND_SOC_DAILINK_DEFS(cpu_dsp,
	DAILINK_COMP_ARRAY(COMP_CPU("samsung-i2s.0")),
	DAILINK_COMP_ARRAY(COMP_CODEC("spi0.0", "wm0010-sdi1")),
	DAILINK_COMP_ARRAY(COMP_PLATFORM("samsung-i2s.0")));

SND_SOC_DAILINK_DEFS(dsp_codec,
	DAILINK_COMP_ARRAY(COMP_CPU("wm0010-sdi2")),
	DAILINK_COMP_ARRAY(COMP_CODEC("wm8996.1-001a", "wm8996-aif1")));

SND_SOC_DAILINK_DEFS(baseband,
	DAILINK_COMP_ARRAY(COMP_CPU("wm8996-aif2")),
	DAILINK_COMP_ARRAY(COMP_CODEC("wm1250-ev1.1-0027", "wm1250-ev1")));

static struct snd_soc_dai_link speyside_dai[] = {
	{
		.name = "CPU-DSP",
		.stream_name = "CPU-DSP",
		.init = speyside_wm0010_init,
		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
				| SND_SOC_DAIFMT_CBP_CFP,
		SND_SOC_DAILINK_REG(cpu_dsp),
	},
	{
		.name = "DSP-CODEC",
		.stream_name = "DSP-CODEC",
		.init = speyside_wm8996_init,
		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
				| SND_SOC_DAIFMT_CBP_CFP,
		.c2c_params = &dsp_codec_params,
		.num_c2c_params = 1,
		.ignore_suspend = 1,
		SND_SOC_DAILINK_REG(dsp_codec),
	},
	{
		.name = "Baseband",
		.stream_name = "Baseband",
		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
				| SND_SOC_DAIFMT_CBP_CFP,
		.ignore_suspend = 1,
		SND_SOC_DAILINK_REG(baseband),
	},
};

static int speyside_wm9081_init(struct snd_soc_component *component)
{
	/* At any time the WM9081 is active it will have this clock */
	return snd_soc_component_set_sysclk(component, WM9081_SYSCLK_MCLK, 0,
					MCLK_AUDIO_RATE, 0);
}

static struct snd_soc_aux_dev speyside_aux_dev[] = {
	{
		.dlc = COMP_AUX("wm9081.1-006c"),
		.init = speyside_wm9081_init,
	},
};

static struct snd_soc_codec_conf speyside_codec_conf[] = {
	{
		.dlc = COMP_CODEC_CONF("wm9081.1-006c"),
		.name_prefix = "Sub",
	},
};

static const struct snd_kcontrol_new controls[] = {
	SOC_DAPM_PIN_SWITCH("Main Speaker"),
	SOC_DAPM_PIN_SWITCH("Main DMIC"),
	SOC_DAPM_PIN_SWITCH("Main AMIC"),
	SOC_DAPM_PIN_SWITCH("WM1250 Input"),
	SOC_DAPM_PIN_SWITCH("WM1250 Output"),
	SOC_DAPM_PIN_SWITCH("Headphone"),
};

static const struct snd_soc_dapm_widget widgets[] = {
	SND_SOC_DAPM_HP("Headphone", NULL),
	SND_SOC_DAPM_MIC("Headset Mic", NULL),

	SND_SOC_DAPM_SPK("Main Speaker", NULL),

	SND_SOC_DAPM_MIC("Main AMIC", NULL),
	SND_SOC_DAPM_MIC("Main DMIC", NULL),
};

static const struct snd_soc_dapm_route audio_paths[] = {
	{ "IN1RN", NULL, "MICB1" },
	{ "IN1RP", NULL, "MICB1" },
	{ "IN1RN", NULL, "MICB2" },
	{ "IN1RP", NULL, "MICB2" },
	{ "MICB1", NULL, "Headset Mic", speyside_get_micbias },
	{ "MICB2", NULL, "Headset Mic", speyside_get_micbias },

	{ "IN1LP", NULL, "MICB2" },
	{ "IN1RN", NULL, "MICB1" },
	{ "MICB2", NULL, "Main AMIC" },

	{ "DMIC1DAT", NULL, "MICB1" },
	{ "DMIC2DAT", NULL, "MICB1" },
	{ "MICB1", NULL, "Main DMIC" },

	{ "Headphone", NULL, "HPOUT1L" },
	{ "Headphone", NULL, "HPOUT1R" },

	{ "Sub IN1", NULL, "HPOUT2L" },
	{ "Sub IN2", NULL, "HPOUT2R" },

	{ "Main Speaker", NULL, "Sub SPKN" },
	{ "Main Speaker", NULL, "Sub SPKP" },
	{ "Main Speaker", NULL, "SPKDAT" },
};

static struct snd_soc_card speyside = {
	.name = "Speyside",
	.owner = THIS_MODULE,
	.dai_link = speyside_dai,
	.num_links = ARRAY_SIZE(speyside_dai),
	.aux_dev = speyside_aux_dev,
	.num_aux_devs = ARRAY_SIZE(speyside_aux_dev),
	.codec_conf = speyside_codec_conf,
	.num_configs = ARRAY_SIZE(speyside_codec_conf),

	.set_bias_level = speyside_set_bias_level,
	.set_bias_level_post = speyside_set_bias_level_post,

	.controls = controls,
	.num_controls = ARRAY_SIZE(controls),
	.dapm_widgets = widgets,
	.num_dapm_widgets = ARRAY_SIZE(widgets),
	.dapm_routes = audio_paths,
	.num_dapm_routes = ARRAY_SIZE(audio_paths),
	.fully_routed = true,

	.late_probe = speyside_late_probe,
};

static struct gpiod_lookup_table wm8996_gpiod_table = {
	/* Hardcoded device name in board file mach-crag6410.c */
	.dev_id = "speyside",
	.table = {
		/*
		 * This line was hardcoded to 214 in the global GPIO
		 * number space, S3C GPIO macros seems top set the
		 * wm8996 codec GPIO start offset to 212, so this will
		 * be GPIO 214 - 212 = 2 on the wm8996.
		 */
		GPIO_LOOKUP("wm8996", 2, "hp-sel", GPIO_ACTIVE_HIGH),
		{ },
	},
};

static void speyside_gpiod_table_action(void *data)
{
	gpiod_remove_lookup_table(&wm8996_gpiod_table);
}

static int speyside_probe(struct platform_device *pdev)
{
	struct snd_soc_card *card = &speyside;
	int ret;

	card->dev = &pdev->dev;

	gpiod_add_lookup_table(&wm8996_gpiod_table);
	ret = devm_add_action_or_reset(&pdev->dev, speyside_gpiod_table_action,
				       NULL);
	if (ret)
		return ret;

	ret = devm_snd_soc_register_card(&pdev->dev, card);
	if (ret)
		dev_err_probe(&pdev->dev, ret, "snd_soc_register_card() failed\n");

	return ret;
}

static struct platform_driver speyside_driver = {
	.driver = {
		.name = "speyside",
		.pm = &snd_soc_pm_ops,
	},
	.probe = speyside_probe,
};

module_platform_driver(speyside_driver);

MODULE_DESCRIPTION("Speyside audio support");
MODULE_AUTHOR("Mark Brown <[email protected]>");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:speyside");