simple-card-utils.c

// SPDX-License-Identifier: GPL-2.0
//
// simple-card-utils.c
//
// Copyright (c) 2016 Kuninori Morimoto <[email protected]>

#include <dt-bindings/sound/audio-graph.h>
#include <linux/cleanup.h>
#include <linux/clk.h>
#include <linux/gpio/consumer.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_graph.h>
#include <sound/jack.h>
#include <sound/pcm_params.h>
#include <sound/simple_card_utils.h>

#define simple_ret(priv, ret) _simple_ret(priv, __func__, ret)
static inline int _simple_ret(struct simple_util_priv *priv,
			      const char *func, int ret)
{
	return snd_soc_ret(simple_priv_to_dev(priv), ret, "at %s()\n", func);
}

int simple_util_get_sample_fmt(struct simple_util_data *data)
{
	int i;
	int val = -EINVAL;

	struct {
		char *fmt;
		u32 val;
	} of_sample_fmt_table[] = {
		{ "s8",		SNDRV_PCM_FORMAT_S8},
		{ "s16_le",	SNDRV_PCM_FORMAT_S16_LE},
		{ "s24_le",	SNDRV_PCM_FORMAT_S24_LE},
		{ "s24_3le",	SNDRV_PCM_FORMAT_S24_3LE},
		{ "s32_le",	SNDRV_PCM_FORMAT_S32_LE},
	};

	for (i = 0; i < ARRAY_SIZE(of_sample_fmt_table); i++) {
		if (!strcmp(data->convert_sample_format,
			    of_sample_fmt_table[i].fmt)) {
			val = of_sample_fmt_table[i].val;
			break;
		}
	}
	return val;
}
EXPORT_SYMBOL_GPL(simple_util_get_sample_fmt);

static void simple_fixup_sample_fmt(struct simple_util_data *data,
				    struct snd_pcm_hw_params *params)
{
	int val;
	struct snd_mask *mask = hw_param_mask(params,
					      SNDRV_PCM_HW_PARAM_FORMAT);

	val = simple_util_get_sample_fmt(data);
	if (val >= 0) {
		snd_mask_none(mask);
		snd_mask_set(mask, val);
	}
}

void simple_util_parse_convert(struct device_node *np,
			       char *prefix,
			       struct simple_util_data *data)
{
	char prop[128];

	if (!np)
		return;

	if (!prefix)
		prefix = "";

	/* sampling rate convert */
	snprintf(prop, sizeof(prop), "%s%s", prefix, "convert-rate");
	of_property_read_u32(np, prop, &data->convert_rate);

	/* channels transfer */
	snprintf(prop, sizeof(prop), "%s%s", prefix, "convert-channels");
	of_property_read_u32(np, prop, &data->convert_channels);

	/* convert sample format */
	snprintf(prop, sizeof(prop), "%s%s", prefix, "convert-sample-format");
	of_property_read_string(np, prop, &data->convert_sample_format);
}
EXPORT_SYMBOL_GPL(simple_util_parse_convert);

/**
 * simple_util_is_convert_required() - Query if HW param conversion was requested
 * @data: Link data.
 *
 * Returns true if any HW param conversion was requested for this DAI link with
 * any "convert-xxx" properties.
 */
bool simple_util_is_convert_required(const struct simple_util_data *data)
{
	return data->convert_rate ||
	       data->convert_channels ||
	       data->convert_sample_format;
}
EXPORT_SYMBOL_GPL(simple_util_is_convert_required);

int simple_util_parse_daifmt(struct device *dev,
			     struct device_node *node,
			     struct device_node *codec,
			     char *prefix,
			     unsigned int *retfmt)
{
	struct device_node *bitclkmaster = NULL;
	struct device_node *framemaster = NULL;
	unsigned int daifmt;

	daifmt = snd_soc_daifmt_parse_format(node, prefix);

	snd_soc_daifmt_parse_clock_provider_as_phandle(node, prefix, &bitclkmaster, &framemaster);
	if (!bitclkmaster && !framemaster) {
		/*
		 * No dai-link level and master setting was not found from
		 * sound node level, revert back to legacy DT parsing and
		 * take the settings from codec node.
		 */
		dev_dbg(dev, "Revert to legacy daifmt parsing\n");

		daifmt |= snd_soc_daifmt_parse_clock_provider_as_flag(codec, NULL);
	} else {
		daifmt |= snd_soc_daifmt_clock_provider_from_bitmap(
				((codec == bitclkmaster) << 4) | (codec == framemaster));
	}

	of_node_put(bitclkmaster);
	of_node_put(framemaster);

	*retfmt = daifmt;

	return 0;
}
EXPORT_SYMBOL_GPL(simple_util_parse_daifmt);

int simple_util_parse_tdm_width_map(struct simple_util_priv *priv, struct device_node *np,
				    struct simple_util_dai *dai)
{
	struct device *dev = simple_priv_to_dev(priv);
	int n, i, ret;
	u32 *p;

	/*
	 * NOTE
	 *
	 * Clang doesn't allow to use "goto end" before calling __free(),
	 * because it bypasses the initialization. Use simple_ret() directly.
	 */

	n = of_property_count_elems_of_size(np, "dai-tdm-slot-width-map", sizeof(u32));
	if (n <= 0)
		return 0;

	if (n % 3) {
		dev_err(dev, "Invalid number of cells for dai-tdm-slot-width-map\n");
		return simple_ret(priv, -EINVAL); /* see NOTE */
	}

	ret = -ENOMEM;
	dai->tdm_width_map = devm_kcalloc(dev, n, sizeof(*dai->tdm_width_map), GFP_KERNEL);
	if (!dai->tdm_width_map)
		return simple_ret(priv, ret); /* see NOTE */

	u32 *array_values __free(kfree) = kcalloc(n, sizeof(*array_values), GFP_KERNEL);
	if (!array_values)
		goto end;

	ret = of_property_read_u32_array(np, "dai-tdm-slot-width-map", array_values, n);
	if (ret < 0) {
		dev_err(dev, "Could not read dai-tdm-slot-width-map: %d\n", ret);
		goto end;
	}

	p = array_values;
	for (i = 0; i < n / 3; ++i) {
		dai->tdm_width_map[i].sample_bits = *p++;
		dai->tdm_width_map[i].slot_width = *p++;
		dai->tdm_width_map[i].slot_count = *p++;
	}

	dai->n_tdm_widths = i;
	ret = 0;
end:
	return simple_ret(priv, ret);
}
EXPORT_SYMBOL_GPL(simple_util_parse_tdm_width_map);

int simple_util_set_dailink_name(struct simple_util_priv *priv,
				 struct snd_soc_dai_link *dai_link,
				 const char *fmt, ...)
{
	struct device *dev = simple_priv_to_dev(priv);
	va_list ap;
	char *name = NULL;
	int ret = -ENOMEM;

	va_start(ap, fmt);
	name = devm_kvasprintf(dev, GFP_KERNEL, fmt, ap);
	va_end(ap);

	if (name) {
		ret = 0;

		dai_link->name		= name;
		dai_link->stream_name	= name;
	}

	return simple_ret(priv, ret);
}
EXPORT_SYMBOL_GPL(simple_util_set_dailink_name);

int simple_util_parse_card_name(struct simple_util_priv *priv,
				char *prefix)
{
	struct snd_soc_card *card = simple_priv_to_card(priv);
	int ret;

	if (!prefix)
		prefix = "";

	/* Parse the card name from DT */
	ret = snd_soc_of_parse_card_name(card, "label");
	if (ret < 0 || !card->name) {
		char prop[128];

		snprintf(prop, sizeof(prop), "%sname", prefix);
		ret = snd_soc_of_parse_card_name(card, prop);
		if (ret < 0)
			goto end;
	}

	if (!card->name && card->dai_link)
		card->name = card->dai_link->name;
end:
	return simple_ret(priv, ret);
}
EXPORT_SYMBOL_GPL(simple_util_parse_card_name);

static int simple_clk_enable(struct simple_util_dai *dai)
{
	if (dai)
		return clk_prepare_enable(dai->clk);

	return 0;
}

static void simple_clk_disable(struct simple_util_dai *dai)
{
	if (dai)
		clk_disable_unprepare(dai->clk);
}

int simple_util_parse_clk(struct device *dev,
			  struct device_node *node,
			  struct simple_util_dai *simple_dai,
			  struct snd_soc_dai_link_component *dlc)
{
	struct clk *clk;
	u32 val;

	/*
	 * Parse dai->sysclk come from "clocks = <&xxx>"
	 * (if system has common clock)
	 *  or "system-clock-frequency = <xxx>"
	 *  or device's module clock.
	 */
	clk = devm_get_clk_from_child(dev, node, NULL);
	simple_dai->clk_fixed = of_property_read_bool(
		node, "system-clock-fixed");
	if (!IS_ERR(clk)) {
		simple_dai->sysclk = clk_get_rate(clk);

		simple_dai->clk = clk;
	} else if (!of_property_read_u32(node, "system-clock-frequency", &val)) {
		simple_dai->sysclk = val;
		simple_dai->clk_fixed = true;
	} else {
		clk = devm_get_clk_from_child(dev, dlc->of_node, NULL);
		if (!IS_ERR(clk))
			simple_dai->sysclk = clk_get_rate(clk);
	}

	if (of_property_read_bool(node, "system-clock-direction-out"))
		simple_dai->clk_direction = SND_SOC_CLOCK_OUT;

	return 0;
}
EXPORT_SYMBOL_GPL(simple_util_parse_clk);

static int simple_check_fixed_sysclk(struct device *dev,
					  struct simple_util_dai *dai,
					  unsigned int *fixed_sysclk)
{
	if (dai->clk_fixed) {
		if (*fixed_sysclk && *fixed_sysclk != dai->sysclk) {
			dev_err(dev, "inconsistent fixed sysclk rates (%u vs %u)\n",
				*fixed_sysclk, dai->sysclk);
			return -EINVAL;
		}
		*fixed_sysclk = dai->sysclk;
	}

	return 0;
}

int simple_util_startup(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
	struct simple_util_priv *priv = snd_soc_card_get_drvdata(rtd->card);
	struct simple_dai_props *props = runtime_simple_priv_to_props(priv, rtd);
	struct simple_util_dai *dai;
	unsigned int fixed_sysclk = 0;
	int i1, i2, i;
	int ret;

	for_each_prop_dai_cpu(props, i1, dai) {
		ret = simple_clk_enable(dai);
		if (ret)
			goto cpu_err;
		ret = simple_check_fixed_sysclk(rtd->dev, dai, &fixed_sysclk);
		if (ret)
			goto cpu_err;
	}

	for_each_prop_dai_codec(props, i2, dai) {
		ret = simple_clk_enable(dai);
		if (ret)
			goto codec_err;
		ret = simple_check_fixed_sysclk(rtd->dev, dai, &fixed_sysclk);
		if (ret)
			goto codec_err;
	}

	if (fixed_sysclk && props->mclk_fs) {
		unsigned int fixed_rate = fixed_sysclk / props->mclk_fs;

		if (fixed_sysclk % props->mclk_fs) {
			dev_err(rtd->dev, "fixed sysclk %u not divisible by mclk_fs %u\n",
				fixed_sysclk, props->mclk_fs);
			ret = -EINVAL;
			goto codec_err;
		}
		ret = snd_pcm_hw_constraint_minmax(substream->runtime, SNDRV_PCM_HW_PARAM_RATE,
			fixed_rate, fixed_rate);
		if (ret < 0)
			goto codec_err;
	}

	return 0;

codec_err:
	for_each_prop_dai_codec(props, i, dai) {
		if (i >= i2)
			break;
		simple_clk_disable(dai);
	}
cpu_err:
	for_each_prop_dai_cpu(props, i, dai) {
		if (i >= i1)
			break;
		simple_clk_disable(dai);
	}

	return simple_ret(priv, ret);
}
EXPORT_SYMBOL_GPL(simple_util_startup);

void simple_util_shutdown(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
	struct simple_util_priv *priv = snd_soc_card_get_drvdata(rtd->card);
	struct simple_dai_props *props = runtime_simple_priv_to_props(priv, rtd);
	struct simple_util_dai *dai;
	int i;

	for_each_prop_dai_cpu(props, i, dai) {
		struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, i);

		if (props->mclk_fs && !dai->clk_fixed && !snd_soc_dai_active(cpu_dai))
			snd_soc_dai_set_sysclk(cpu_dai, 0, 0, dai->clk_direction);

		simple_clk_disable(dai);
	}
	for_each_prop_dai_codec(props, i, dai) {
		struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, i);

		if (props->mclk_fs && !dai->clk_fixed && !snd_soc_dai_active(codec_dai))
			snd_soc_dai_set_sysclk(codec_dai, 0, 0, dai->clk_direction);

		simple_clk_disable(dai);
	}
}
EXPORT_SYMBOL_GPL(simple_util_shutdown);

static int simple_set_clk_rate(struct simple_util_priv *priv,
			       struct simple_util_dai *simple_dai,
			       unsigned long rate)
{
	struct device *dev = simple_priv_to_dev(priv);
	int ret = -EINVAL;

	if (!simple_dai)
		return 0;

	if (simple_dai->clk_fixed && rate != simple_dai->sysclk) {
		dev_err(dev, "dai %s invalid clock rate %lu\n", simple_dai->name, rate);
		goto end;
	}

	if (!simple_dai->clk)
		return 0;

	if (clk_get_rate(simple_dai->clk) == rate)
		return 0;

	ret = clk_set_rate(simple_dai->clk, rate);
end:
	return simple_ret(priv, ret);
}

static int simple_set_tdm(struct simple_util_priv *priv,
			  struct snd_soc_dai *dai,
			  struct simple_util_dai *simple_dai,
			  struct snd_pcm_hw_params *params)
{
	int sample_bits = params_width(params);
	int slot_width, slot_count;
	int i, ret;

	if (!simple_dai || !simple_dai->tdm_width_map)
		return 0;

	slot_width = simple_dai->slot_width;
	slot_count = simple_dai->slots;

	if (slot_width == 0)
		slot_width = sample_bits;

	for (i = 0; i < simple_dai->n_tdm_widths; ++i) {
		if (simple_dai->tdm_width_map[i].sample_bits == sample_bits) {
			slot_width = simple_dai->tdm_width_map[i].slot_width;
			slot_count = simple_dai->tdm_width_map[i].slot_count;
			break;
		}
	}

	ret = snd_soc_dai_set_tdm_slot(dai,
				       simple_dai->tx_slot_mask,
				       simple_dai->rx_slot_mask,
				       slot_count,
				       slot_width);

	return simple_ret(priv, ret);
}

int simple_util_hw_params(struct snd_pcm_substream *substream,
			  struct snd_pcm_hw_params *params)
{
	struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
	struct simple_util_dai *pdai;
	struct snd_soc_dai *sdai;
	struct simple_util_priv *priv = snd_soc_card_get_drvdata(rtd->card);
	struct simple_dai_props *props = runtime_simple_priv_to_props(priv, rtd);
	unsigned int mclk, mclk_fs = 0;
	int i, ret;

	if (props->mclk_fs)
		mclk_fs = props->mclk_fs;

	if (mclk_fs) {
		struct snd_soc_component *component;
		mclk = params_rate(params) * mclk_fs;

		for_each_prop_dai_codec(props, i, pdai) {
			ret = simple_set_clk_rate(priv, pdai, mclk);
			if (ret < 0)
				goto end;
		}

		for_each_prop_dai_cpu(props, i, pdai) {
			ret = simple_set_clk_rate(priv, pdai, mclk);
			if (ret < 0)
				goto end;
		}

		/* Ensure sysclk is set on all components in case any
		 * (such as platform components) are missed by calls to
		 * snd_soc_dai_set_sysclk.
		 */
		for_each_rtd_components(rtd, i, component) {
			ret = snd_soc_component_set_sysclk(component, 0, 0,
							   mclk, SND_SOC_CLOCK_IN);
			if (ret && ret != -ENOTSUPP)
				goto end;
		}

		for_each_rtd_codec_dais(rtd, i, sdai) {
			pdai = simple_props_to_dai_codec(props, i);
			ret = snd_soc_dai_set_sysclk(sdai, 0, mclk, pdai->clk_direction);
			if (ret && ret != -ENOTSUPP)
				goto end;
		}

		for_each_rtd_cpu_dais(rtd, i, sdai) {
			pdai = simple_props_to_dai_cpu(props, i);
			ret = snd_soc_dai_set_sysclk(sdai, 0, mclk, pdai->clk_direction);
			if (ret && ret != -ENOTSUPP)
				goto end;
		}
	}

	for_each_prop_dai_codec(props, i, pdai) {
		sdai = snd_soc_rtd_to_codec(rtd, i);
		ret = simple_set_tdm(priv, sdai, pdai, params);
		if (ret < 0)
			goto end;
	}

	for_each_prop_dai_cpu(props, i, pdai) {
		sdai = snd_soc_rtd_to_cpu(rtd, i);
		ret = simple_set_tdm(priv, sdai, pdai, params);
		if (ret < 0)
			goto end;
	}
	ret = 0;
end:
	return simple_ret(priv, ret);
}
EXPORT_SYMBOL_GPL(simple_util_hw_params);

int simple_util_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
				   struct snd_pcm_hw_params *params)
{
	struct simple_util_priv *priv = snd_soc_card_get_drvdata(rtd->card);
	struct simple_dai_props *dai_props = runtime_simple_priv_to_props(priv, rtd);
	struct simple_util_data *data = &dai_props->adata;
	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);

	if (data->convert_rate)
		rate->min =
		rate->max = data->convert_rate;

	if (data->convert_channels)
		channels->min =
		channels->max = data->convert_channels;

	if (data->convert_sample_format)
		simple_fixup_sample_fmt(data, params);

	return 0;
}
EXPORT_SYMBOL_GPL(simple_util_be_hw_params_fixup);

static int simple_init_dai(struct simple_util_priv *priv,
			   struct snd_soc_dai *dai, struct simple_util_dai *simple_dai)
{
	int ret;

	if (!simple_dai)
		return 0;

	if (simple_dai->sysclk) {
		ret = snd_soc_dai_set_sysclk(dai, 0, simple_dai->sysclk,
					     simple_dai->clk_direction);
		if (ret && ret != -ENOTSUPP) {
			dev_err(dai->dev, "simple-card: set_sysclk error\n");
			goto end;
		}
	}

	if (simple_dai->slots) {
		ret = snd_soc_dai_set_tdm_slot(dai,
					       simple_dai->tx_slot_mask,
					       simple_dai->rx_slot_mask,
					       simple_dai->slots,
					       simple_dai->slot_width);
		if (ret && ret != -ENOTSUPP) {
			dev_err(dai->dev, "simple-card: set_tdm_slot error\n");
			goto end;
		}
	}
	ret = 0;
end:
	return simple_ret(priv, ret);
}

static inline int simple_component_is_codec(struct snd_soc_component *component)
{
	return component->driver->endianness;
}

static int simple_init_for_codec2codec(struct simple_util_priv *priv,
				       struct snd_soc_pcm_runtime *rtd,
				       struct simple_dai_props *dai_props)
{
	struct snd_soc_dai_link *dai_link = rtd->dai_link;
	struct snd_soc_component *component;
	struct snd_soc_pcm_stream *c2c_params;
	struct snd_pcm_hardware hw;
	int i, ret, stream;

	/* Do nothing if it already has Codec2Codec settings */
	if (dai_link->c2c_params)
		return 0;

	/* Do nothing if it was DPCM :: BE */
	if (dai_link->no_pcm)
		return 0;

	/* Only Codecs */
	for_each_rtd_components(rtd, i, component) {
		if (!simple_component_is_codec(component))
			return 0;
	}

	/* Assumes the capabilities are the same for all supported streams */
	for_each_pcm_streams(stream) {
		ret = snd_soc_runtime_calc_hw(rtd, &hw, stream);
		if (ret == 0)
			break;
	}

	if (ret < 0) {
		dev_err(rtd->dev, "simple-card: no valid dai_link params\n");
		goto end;
	}

	ret = -ENOMEM;
	c2c_params = devm_kzalloc(rtd->dev, sizeof(*c2c_params), GFP_KERNEL);
	if (!c2c_params)
		goto end;

	c2c_params->formats		= hw.formats;
	c2c_params->rates		= hw.rates;
	c2c_params->rate_min		= hw.rate_min;
	c2c_params->rate_max		= hw.rate_max;
	c2c_params->channels_min	= hw.channels_min;
	c2c_params->channels_max	= hw.channels_max;

	dai_link->c2c_params		= c2c_params;
	dai_link->num_c2c_params	= 1;

	ret = 0;
end:
	return simple_ret(priv, ret);
}

int simple_util_dai_init(struct snd_soc_pcm_runtime *rtd)
{
	struct simple_util_priv *priv = snd_soc_card_get_drvdata(rtd->card);
	struct simple_dai_props *props = runtime_simple_priv_to_props(priv, rtd);
	struct simple_util_dai *dai;
	int i, ret;

	for_each_prop_dai_codec(props, i, dai) {
		ret = simple_init_dai(priv, snd_soc_rtd_to_codec(rtd, i), dai);
		if (ret < 0)
			goto end;
	}
	for_each_prop_dai_cpu(props, i, dai) {
		ret = simple_init_dai(priv, snd_soc_rtd_to_cpu(rtd, i), dai);
		if (ret < 0)
			goto end;
	}

	ret = simple_init_for_codec2codec(priv, rtd, props);
end:
	return simple_ret(priv, ret);
}
EXPORT_SYMBOL_GPL(simple_util_dai_init);

void simple_util_canonicalize_platform(struct snd_soc_dai_link_component *platforms,
				       struct snd_soc_dai_link_component *cpus)
{
	/*
	 * Assumes Platform == CPU
	 *
	 * Some CPU might be using soc-generic-dmaengine-pcm. This means CPU and Platform
	 * are different Component, but are sharing same component->dev.
	 *
	 * Let's assume Platform is same as CPU if it doesn't identify Platform on DT.
	 * see
	 *	simple-card.c :: simple_count_noml()
	 */
	if (!platforms->of_node)
		snd_soc_dlc_use_cpu_as_platform(platforms, cpus);
}
EXPORT_SYMBOL_GPL(simple_util_canonicalize_platform);

void simple_util_canonicalize_cpu(struct snd_soc_dai_link_component *cpus,
				  int is_single_links)
{
	/*
	 * In soc_bind_dai_link() will check cpu name after
	 * of_node matching if dai_link has cpu_dai_name.
	 * but, it will never match if name was created by
	 * fmt_single_name() remove cpu_dai_name if cpu_args
	 * was 0. See:
	 *	fmt_single_name()
	 *	fmt_multiple_name()
	 */
	if (is_single_links)
		cpus->dai_name = NULL;
}
EXPORT_SYMBOL_GPL(simple_util_canonicalize_cpu);

void simple_util_clean_reference(struct snd_soc_card *card)
{
	struct snd_soc_dai_link *dai_link;
	struct snd_soc_dai_link_component *cpu;
	struct snd_soc_dai_link_component *codec;
	int i, j;

	for_each_card_prelinks(card, i, dai_link) {
		for_each_link_cpus(dai_link, j, cpu)
			of_node_put(cpu->of_node);
		for_each_link_codecs(dai_link, j, codec)
			of_node_put(codec->of_node);
	}
}
EXPORT_SYMBOL_GPL(simple_util_clean_reference);

int simple_util_parse_routing(struct snd_soc_card *card,
			      char *prefix)
{
	struct device_node *node = card->dev->of_node;
	char prop[128];

	if (!prefix)
		prefix = "";

	snprintf(prop, sizeof(prop), "%s%s", prefix, "routing");

	if (!of_property_present(node, prop))
		return 0;

	return snd_soc_of_parse_audio_routing(card, prop);
}
EXPORT_SYMBOL_GPL(simple_util_parse_routing);

int simple_util_parse_widgets(struct snd_soc_card *card,
			      char *prefix)
{
	struct device_node *node = card->dev->of_node;
	char prop[128];

	if (!prefix)
		prefix = "";

	snprintf(prop, sizeof(prop), "%s%s", prefix, "widgets");

	if (of_property_present(node, prop))
		return snd_soc_of_parse_audio_simple_widgets(card, prop);

	/* no widgets is not error */
	return 0;
}
EXPORT_SYMBOL_GPL(simple_util_parse_widgets);

int simple_util_parse_pin_switches(struct snd_soc_card *card,
				   char *prefix)
{
	char prop[128];

	if (!prefix)
		prefix = "";

	snprintf(prop, sizeof(prop), "%s%s", prefix, "pin-switches");

	return snd_soc_of_parse_pin_switches(card, prop);
}
EXPORT_SYMBOL_GPL(simple_util_parse_pin_switches);

int simple_util_init_jack(struct snd_soc_card *card,
			  struct simple_util_jack *sjack,
			  int is_hp, char *prefix,
			  char *pin)
{
	struct device *dev = card->dev;
	struct gpio_desc *desc;
	char prop[128];
	char *pin_name;
	char *gpio_name;
	int mask;
	int error;

	if (!prefix)
		prefix = "";

	if (is_hp) {
		snprintf(prop, sizeof(prop), "%shp-det", prefix);
		pin_name	= pin ? pin : "Headphones";
		gpio_name	= "Headphone detection";
		mask		= SND_JACK_HEADPHONE;
	} else {
		snprintf(prop, sizeof(prop), "%smic-det", prefix);
		pin_name	= pin ? pin : "Mic Jack";
		gpio_name	= "Mic detection";
		mask		= SND_JACK_MICROPHONE;
	}

	desc = gpiod_get_optional(dev, prop, GPIOD_IN);
	error = PTR_ERR_OR_ZERO(desc);
	if (error)
		return error;

	if (desc) {
		error = gpiod_set_consumer_name(desc, gpio_name);
		if (error)
			return error;

		sjack->pin.pin		= pin_name;
		sjack->pin.mask		= mask;

		sjack->gpio.name	= gpio_name;
		sjack->gpio.report	= mask;
		sjack->gpio.desc	= desc;
		sjack->gpio.debounce_time = 150;

		snd_soc_card_jack_new_pins(card, pin_name, mask, &sjack->jack,
					   &sjack->pin, 1);

		snd_soc_jack_add_gpios(&sjack->jack, 1, &sjack->gpio);
	}

	return 0;
}
EXPORT_SYMBOL_GPL(simple_util_init_jack);

int simple_util_init_aux_jacks(struct simple_util_priv *priv, char *prefix)
{
	struct snd_soc_card *card = simple_priv_to_card(priv);
	struct snd_soc_component *component;
	int found_jack_index = 0;
	int type = 0;
	int num = 0;
	int ret;

	if (priv->aux_jacks)
		return 0;

	for_each_card_auxs(card, component) {
		type = snd_soc_component_get_jack_type(component);
		if (type > 0)
			num++;
	}
	if (num < 1)
		return 0;

	priv->aux_jacks = devm_kcalloc(card->dev, num,
				       sizeof(struct snd_soc_jack), GFP_KERNEL);
	if (!priv->aux_jacks)
		return simple_ret(priv, -ENOMEM);

	for_each_card_auxs(card, component) {
		char id[128];
		struct snd_soc_jack *jack;

		if (found_jack_index >= num)
			break;

		type = snd_soc_component_get_jack_type(component);
		if (type <= 0)
			continue;

		/* create jack */
		jack = &(priv->aux_jacks[found_jack_index++]);
		snprintf(id, sizeof(id), "%s-jack", component->name);
		ret = snd_soc_card_jack_new(card, id, type, jack);
		if (ret)
			continue;

		(void)snd_soc_component_set_jack(component, jack, NULL);
	}
	return 0;
}
EXPORT_SYMBOL_GPL(simple_util_init_aux_jacks);

static struct simple_util_dai dummy_util_dais = {
	.name = "dummy_util_dais",
};

int simple_util_init_priv(struct simple_util_priv *priv,
			  struct link_info *li)
{
	struct snd_soc_card *card = simple_priv_to_card(priv);
	struct device *dev = simple_priv_to_dev(priv);
	struct snd_soc_dai_link *dai_link;
	struct simple_dai_props *dai_props;
	struct simple_util_dai *dais;
	struct snd_soc_dai_link_component *dlcs;
	struct snd_soc_codec_conf *cconf = NULL;
	int i, dai_num = 0, dlc_num = 0, cnf_num = 0;

	dai_props = devm_kcalloc(dev, li->link, sizeof(*dai_props), GFP_KERNEL);
	dai_link  = devm_kcalloc(dev, li->link, sizeof(*dai_link),  GFP_KERNEL);
	if (!dai_props || !dai_link)
		return -ENOMEM;

	/*
	 * dais (= CPU+Codec)
	 * dlcs (= CPU+Codec+Platform)
	 */
	for (i = 0; i < li->link; i++) {
		int cc = li->num[i].cpus + li->num[i].codecs;

		dai_num += cc;
		dlc_num += cc + li->num[i].platforms;

		if (!li->num[i].cpus)
			cnf_num += li->num[i].codecs;
	}

	dais = devm_kcalloc(dev, dai_num, sizeof(*dais), GFP_KERNEL);
	dlcs = devm_kcalloc(dev, dlc_num, sizeof(*dlcs), GFP_KERNEL);
	if (!dais || !dlcs)
		return -ENOMEM;

	if (cnf_num) {
		cconf = devm_kcalloc(dev, cnf_num, sizeof(*cconf), GFP_KERNEL);
		if (!cconf)
			return -ENOMEM;
	}

	dev_dbg(dev, "link %d, dais %d, ccnf %d\n",
		li->link, dai_num, cnf_num);

	priv->dai_props		= dai_props;
	priv->dai_link		= dai_link;
	priv->dais		= dais;
	priv->dlcs		= dlcs;
	priv->codec_conf	= cconf;

	card->dai_link		= priv->dai_link;
	card->num_links		= li->link;
	card->codec_conf	= cconf;
	card->num_configs	= cnf_num;

	for (i = 0; i < li->link; i++) {
		if (li->num[i].cpus) {
			/* Normal CPU */
			dai_link[i].cpus	= dlcs;
			dai_props[i].num.cpus	=
			dai_link[i].num_cpus	= li->num[i].cpus;
			dai_props[i].cpu_dai	= dais;

			dlcs += li->num[i].cpus;
			dais += li->num[i].cpus;
		} else {
			/* DPCM Be's CPU = dummy */
			dai_link[i].cpus	= &snd_soc_dummy_dlc;
			dai_props[i].num.cpus	=
			dai_link[i].num_cpus	= 1;
			dai_props[i].cpu_dai	= &dummy_util_dais;
		}

		if (li->num[i].codecs) {
			/* Normal Codec */
			dai_link[i].codecs	= dlcs;
			dai_props[i].num.codecs	=
			dai_link[i].num_codecs	= li->num[i].codecs;
			dai_props[i].codec_dai	= dais;

			dlcs += li->num[i].codecs;
			dais += li->num[i].codecs;

			if (!li->num[i].cpus) {
				/* DPCM Be's Codec */
				dai_props[i].codec_conf = cconf;
				cconf += li->num[i].codecs;
			}
		} else {
			/* DPCM Fe's Codec = dummy */
			dai_link[i].codecs	= &snd_soc_dummy_dlc;
			dai_props[i].num.codecs	=
			dai_link[i].num_codecs	= 1;
			dai_props[i].codec_dai	= &dummy_util_dais;
		}

		if (li->num[i].platforms) {
			/* Have Platform */
			dai_link[i].platforms		= dlcs;
			dai_props[i].num.platforms	=
			dai_link[i].num_platforms	= li->num[i].platforms;

			dlcs += li->num[i].platforms;
		} else {
			/* Doesn't have Platform */
			dai_link[i].platforms		= NULL;
			dai_props[i].num.platforms	=
			dai_link[i].num_platforms	= 0;
		}
	}

	return 0;
}
EXPORT_SYMBOL_GPL(simple_util_init_priv);

void simple_util_remove(struct platform_device *pdev)
{
	struct snd_soc_card *card = platform_get_drvdata(pdev);

	simple_util_clean_reference(card);
}
EXPORT_SYMBOL_GPL(simple_util_remove);

int graph_util_card_probe(struct snd_soc_card *card)
{
	struct simple_util_priv *priv = snd_soc_card_get_drvdata(card);
	int ret;

	ret = simple_util_init_hp(card, &priv->hp_jack, NULL);
	if (ret < 0)
		goto end;

	ret = simple_util_init_mic(card, &priv->mic_jack, NULL);
end:
	return simple_ret(priv, ret);
}
EXPORT_SYMBOL_GPL(graph_util_card_probe);

int graph_util_is_ports0(struct device_node *np)
{
	struct device_node *parent __free(device_node) = of_get_parent(np);
	struct device_node *port;

	/* np is "endpoint" or "port" */
	if (of_node_name_eq(np, "endpoint"))
		port = parent;
	else
		port = np;

	struct device_node *ports  __free(device_node) = of_get_parent(port);
	struct device_node *top    __free(device_node) = of_get_parent(ports);
	struct device_node *ports0 __free(device_node) = of_get_child_by_name(top, "ports");

	return ports0 == ports;
}
EXPORT_SYMBOL_GPL(graph_util_is_ports0);

static int graph_get_dai_id(struct device_node *ep)
{
	struct device_node *node __free(device_node) = of_graph_get_port_parent(ep);
	struct device_node *port __free(device_node) = of_get_parent(ep);
	struct of_endpoint info;
	int i, id;
	int ret;

	/* use driver specified DAI ID if exist */
	ret = snd_soc_get_dai_id(ep);
	if (ret != -ENOTSUPP)
		return ret;

	/* use endpoint/port reg if exist */
	ret = of_graph_parse_endpoint(ep, &info);
	if (ret == 0) {
		/*
		 * Because it will count port/endpoint if it doesn't have "reg".
		 * But, we can't judge whether it has "no reg", or "reg = <0>"
		 * only of_graph_parse_endpoint().
		 * We need to check "reg" property
		 */

		/* check port first */
		ret = of_property_present(port, "reg");
		if (ret)
			return info.port;

		/* check endpoint 2nd as backup */
		if (of_property_present(ep,   "reg"))
			return info.id;
	}

	/*
	 * Non HDMI sound case, counting port/endpoint on its DT
	 * is enough. Let's count it.
	 */
	i = 0;
	id = -1;
	for_each_of_graph_port(node, p) {
		if (port == p) {
			id = i;
			break;
		}
		i++;
	}

	if (id < 0)
		return -ENODEV;

	return id;
}

int graph_util_parse_dai(struct simple_util_priv *priv, struct device_node *ep,
			 struct snd_soc_dai_link_component *dlc, int *is_single_link)
{
	struct device *dev = simple_priv_to_dev(priv);
	struct device_node *node;
	struct of_phandle_args args = {};
	struct snd_soc_dai *dai;
	int ret;

	if (!ep)
		return 0;

	node = of_graph_get_port_parent(ep);

	/*
	 * Try to find from DAI node
	 */
	args.np = ep;
	dai = snd_soc_get_dai_via_args(&args);
	if (dai) {
		const char *dai_name = snd_soc_dai_name_get(dai);
		const struct of_phandle_args *dai_args = snd_soc_copy_dai_args(dev, &args);

		ret = -ENOMEM;
		if (!dai_args)
			goto err;

		dlc->of_node  = node;
		dlc->dai_name = dai_name;
		dlc->dai_args = dai_args;

		goto parse_dai_end;
	}

	/* Get dai->name */
	args.np		= node;
	args.args[0]	= graph_get_dai_id(ep);
	args.args_count	= (of_graph_get_endpoint_count(node) > 1);

	/*
	 * FIXME
	 *
	 * Here, dlc->dai_name is pointer to CPU/Codec DAI name.
	 * If user unbinded CPU or Codec driver, but not for Sound Card,
	 * dlc->dai_name is keeping unbinded CPU or Codec
	 * driver's pointer.
	 *
	 * If user re-bind CPU or Codec driver again, ALSA SoC will try
	 * to rebind Card via snd_soc_try_rebind_card(), but because of
	 * above reason, it might can't bind Sound Card.
	 * Because Sound Card is pointing to released dai_name pointer.
	 *
	 * To avoid this rebind Card issue,
	 * 1) It needs to alloc memory to keep dai_name eventhough
	 *    CPU or Codec driver was unbinded, or
	 * 2) user need to rebind Sound Card everytime
	 *    if he unbinded CPU or Codec.
	 */
	ret = snd_soc_get_dlc(&args, dlc);
	if (ret < 0)
		goto err;

parse_dai_end:
	if (is_single_link)
		*is_single_link = of_graph_get_endpoint_count(node) == 1;
	ret = 0;
err:
	if (ret < 0)
		of_node_put(node);

	return simple_ret(priv, ret);
}
EXPORT_SYMBOL_GPL(graph_util_parse_dai);

void graph_util_parse_link_direction(struct device_node *np,
				    bool *playback_only, bool *capture_only)
{
	bool is_playback_only = of_property_read_bool(np, "playback-only");
	bool is_capture_only  = of_property_read_bool(np, "capture-only");

	if (playback_only)
		*playback_only = is_playback_only;
	if (capture_only)
		*capture_only = is_capture_only;
}
EXPORT_SYMBOL_GPL(graph_util_parse_link_direction);

static enum snd_soc_trigger_order
__graph_util_parse_trigger_order(struct simple_util_priv *priv,
				 struct device_node *np,
				 const char *prop)
{
	u32 val[SND_SOC_TRIGGER_SIZE];
	int ret;

	ret = of_property_read_u32_array(np, prop, val, SND_SOC_TRIGGER_SIZE);
	if (ret == 0) {
		struct device *dev = simple_priv_to_dev(priv);
		u32 order =	(val[0] << 8) +
			(val[1] << 4) +
			(val[2]);

		switch (order) {
		case	(SND_SOC_TRIGGER_LINK		<< 8) +
			(SND_SOC_TRIGGER_COMPONENT	<< 4) +
			(SND_SOC_TRIGGER_DAI):
			return SND_SOC_TRIGGER_ORDER_DEFAULT;

		case	(SND_SOC_TRIGGER_LINK		<< 8) +
			(SND_SOC_TRIGGER_DAI		<< 4) +
			(SND_SOC_TRIGGER_COMPONENT):
			return SND_SOC_TRIGGER_ORDER_LDC;

		default:
			dev_err(dev, "unsupported trigger order [0x%x]\n", order);
		}
	}

	/* SND_SOC_TRIGGER_ORDER_MAX means error */
	return SND_SOC_TRIGGER_ORDER_MAX;
}

void graph_util_parse_trigger_order(struct simple_util_priv *priv,
				    struct device_node *np,
				    enum snd_soc_trigger_order *trigger_start,
				    enum snd_soc_trigger_order *trigger_stop)
{
	static enum snd_soc_trigger_order order;

	/*
	 * We can use it like below
	 *
	 * #include <dt-bindings/sound/audio-graph.h>
	 *
	 * link-trigger-order = <SND_SOC_TRIGGER_LINK
	 *			 SND_SOC_TRIGGER_COMPONENT
	 *			 SND_SOC_TRIGGER_DAI>;
	 */

	order = __graph_util_parse_trigger_order(priv, np, "link-trigger-order");
	if (order < SND_SOC_TRIGGER_ORDER_MAX) {
		*trigger_start = order;
		*trigger_stop  = order;
	}

	order = __graph_util_parse_trigger_order(priv, np, "link-trigger-order-start");
	if (order < SND_SOC_TRIGGER_ORDER_MAX)
		*trigger_start = order;

	order = __graph_util_parse_trigger_order(priv, np, "link-trigger-order-stop");
	if (order < SND_SOC_TRIGGER_ORDER_MAX)
		*trigger_stop  = order;

	return;
}
EXPORT_SYMBOL_GPL(graph_util_parse_trigger_order);

/* Module information */
MODULE_AUTHOR("Kuninori Morimoto <[email protected]>");
MODULE_DESCRIPTION("ALSA SoC Simple Card Utils");
MODULE_LICENSE("GPL v2");