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32 results

simple-card-utils.c

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  • simple-card-utils.c 16.69 KiB
    // SPDX-License-Identifier: GPL-2.0
    //
    // simple-card-utils.c
    //
    // Copyright (c) 2016 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
    
    #include <linux/clk.h>
    #include <linux/gpio.h>
    #include <linux/gpio/consumer.h>
    #include <linux/module.h>
    #include <linux/of.h>
    #include <linux/of_gpio.h>
    #include <linux/of_graph.h>
    #include <sound/jack.h>
    #include <sound/simple_card_utils.h>
    
    void asoc_simple_convert_fixup(struct asoc_simple_data *data,
    			       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);
    
    	if (data->convert_rate)
    		rate->min =
    		rate->max = data->convert_rate;
    
    	if (data->convert_channels)
    		channels->min =
    		channels->max = data->convert_channels;
    }
    EXPORT_SYMBOL_GPL(asoc_simple_convert_fixup);
    
    void asoc_simple_parse_convert(struct device *dev,
    			       struct device_node *np,
    			       char *prefix,
    			       struct asoc_simple_data *data)
    {
    	char prop[128];
    
    	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);
    }
    EXPORT_SYMBOL_GPL(asoc_simple_parse_convert);
    
    int asoc_simple_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_of_parse_daifmt(node, prefix,
    					 &bitclkmaster, &framemaster);
    	daifmt &= ~SND_SOC_DAIFMT_MASTER_MASK;
    
    	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_of_parse_daifmt(codec, NULL, NULL, NULL) |
    			(daifmt & ~SND_SOC_DAIFMT_CLOCK_MASK);
    	} else {
    		if (codec == bitclkmaster)
    			daifmt |= (codec == framemaster) ?
    				SND_SOC_DAIFMT_CBM_CFM : SND_SOC_DAIFMT_CBM_CFS;
    		else
    			daifmt |= (codec == framemaster) ?
    				SND_SOC_DAIFMT_CBS_CFM : SND_SOC_DAIFMT_CBS_CFS;
    	}
    
    	of_node_put(bitclkmaster);
    	of_node_put(framemaster);
    
    	*retfmt = daifmt;
    
    	return 0;
    }
    EXPORT_SYMBOL_GPL(asoc_simple_parse_daifmt);
    
    int asoc_simple_set_dailink_name(struct device *dev,
    				 struct snd_soc_dai_link *dai_link,
    				 const char *fmt, ...)
    {
    	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 ret;
    }
    EXPORT_SYMBOL_GPL(asoc_simple_set_dailink_name);
    
    int asoc_simple_parse_card_name(struct snd_soc_card *card,
    				char *prefix)
    {
    	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)
    			return ret;
    	}
    
    	if (!card->name && card->dai_link)
    		card->name = card->dai_link->name;
    
    	return 0;
    }
    EXPORT_SYMBOL_GPL(asoc_simple_parse_card_name);
    
    static int asoc_simple_clk_enable(struct asoc_simple_dai *dai)
    {
    	if (dai)
    		return clk_prepare_enable(dai->clk);
    
    	return 0;
    }
    
    static void asoc_simple_clk_disable(struct asoc_simple_dai *dai)
    {
    	if (dai)
    		clk_disable_unprepare(dai->clk);
    }
    
    int asoc_simple_parse_clk(struct device *dev,
    			  struct device_node *node,
    			  struct asoc_simple_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);
    	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;
    	} 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(asoc_simple_parse_clk);
    
    int asoc_simple_startup(struct snd_pcm_substream *substream)
    {
    	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
    	struct asoc_simple_priv *priv = snd_soc_card_get_drvdata(rtd->card);
    	struct simple_dai_props *dai_props = simple_priv_to_props(priv, rtd->num);
    	int ret;
    
    	ret = asoc_simple_clk_enable(dai_props->cpu_dai);
    	if (ret)
    		return ret;
    
    	ret = asoc_simple_clk_enable(dai_props->codec_dai);
    	if (ret)
    		asoc_simple_clk_disable(dai_props->cpu_dai);
    
    	return ret;
    }
    EXPORT_SYMBOL_GPL(asoc_simple_startup);
    
    void asoc_simple_shutdown(struct snd_pcm_substream *substream)
    {
    	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
    	struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
    	struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
    	struct asoc_simple_priv *priv = snd_soc_card_get_drvdata(rtd->card);
    	struct simple_dai_props *dai_props =
    		simple_priv_to_props(priv, rtd->num);
    
    	if (dai_props->mclk_fs) {
    		snd_soc_dai_set_sysclk(codec_dai, 0, 0, SND_SOC_CLOCK_IN);
    		snd_soc_dai_set_sysclk(cpu_dai, 0, 0, SND_SOC_CLOCK_OUT);
    	}
    
    	asoc_simple_clk_disable(dai_props->cpu_dai);
    
    	asoc_simple_clk_disable(dai_props->codec_dai);
    }
    EXPORT_SYMBOL_GPL(asoc_simple_shutdown);
    
    static int asoc_simple_set_clk_rate(struct asoc_simple_dai *simple_dai,
    				    unsigned long rate)
    {
    	if (!simple_dai)
    		return 0;
    
    	if (!simple_dai->clk)
    		return 0;
    
    	if (clk_get_rate(simple_dai->clk) == rate)
    		return 0;
    
    	return clk_set_rate(simple_dai->clk, rate);
    }
    
    int asoc_simple_hw_params(struct snd_pcm_substream *substream,
    			  struct snd_pcm_hw_params *params)
    {
    	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
    	struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
    	struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
    	struct asoc_simple_priv *priv = snd_soc_card_get_drvdata(rtd->card);
    	struct simple_dai_props *dai_props =
    		simple_priv_to_props(priv, rtd->num);
    	unsigned int mclk, mclk_fs = 0;
    	int ret;
    
    	if (dai_props->mclk_fs)
    		mclk_fs = dai_props->mclk_fs;
    
    	if (mclk_fs) {
    		mclk = params_rate(params) * mclk_fs;
    
    		ret = asoc_simple_set_clk_rate(dai_props->codec_dai, mclk);
    		if (ret < 0)
    			return ret;
    
    		ret = asoc_simple_set_clk_rate(dai_props->cpu_dai, mclk);
    		if (ret < 0)
    			return ret;
    
    		ret = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
    					     SND_SOC_CLOCK_IN);
    		if (ret && ret != -ENOTSUPP)
    			goto err;
    
    		ret = snd_soc_dai_set_sysclk(cpu_dai, 0, mclk,
    					     SND_SOC_CLOCK_OUT);
    		if (ret && ret != -ENOTSUPP)
    			goto err;
    	}
    	return 0;
    err:
    	return ret;
    }
    EXPORT_SYMBOL_GPL(asoc_simple_hw_params);
    
    int asoc_simple_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
    				   struct snd_pcm_hw_params *params)
    {
    	struct asoc_simple_priv *priv = snd_soc_card_get_drvdata(rtd->card);
    	struct simple_dai_props *dai_props = simple_priv_to_props(priv, rtd->num);
    
    	asoc_simple_convert_fixup(&dai_props->adata, params);
    
    	return 0;
    }
    EXPORT_SYMBOL_GPL(asoc_simple_be_hw_params_fixup);
    
    static int asoc_simple_init_dai(struct snd_soc_dai *dai,
    				     struct asoc_simple_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");
    			return ret;
    		}
    	}
    
    	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");
    			return ret;
    		}
    	}
    
    	return 0;
    }
    
    static int asoc_simple_init_dai_link_params(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 *params;
    	struct snd_pcm_hardware hw;
    	int i, ret, stream;
    
    	/* Only codecs should have non_legacy_dai_naming set. */
    	for_each_rtd_components(rtd, i, component) {
    		if (!component->driver->non_legacy_dai_naming)
    			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");
    		return ret;
    	}
    
    	params = devm_kzalloc(rtd->dev, sizeof(*params), GFP_KERNEL);
    	if (!params)
    		return -ENOMEM;
    
    	params->formats = hw.formats;
    	params->rates = hw.rates;
    	params->rate_min = hw.rate_min;
    	params->rate_max = hw.rate_max;
    	params->channels_min = hw.channels_min;
    	params->channels_max = hw.channels_max;
    
    	dai_link->params = params;
    	dai_link->num_params = 1;
    
    	return 0;
    }
    
    int asoc_simple_dai_init(struct snd_soc_pcm_runtime *rtd)
    {
    	struct asoc_simple_priv *priv = snd_soc_card_get_drvdata(rtd->card);
    	struct simple_dai_props *dai_props = simple_priv_to_props(priv, rtd->num);
    	int ret;
    
    	ret = asoc_simple_init_dai(asoc_rtd_to_codec(rtd, 0),
    				   dai_props->codec_dai);
    	if (ret < 0)
    		return ret;
    
    	ret = asoc_simple_init_dai(asoc_rtd_to_cpu(rtd, 0),
    				   dai_props->cpu_dai);
    	if (ret < 0)
    		return ret;
    
    	ret = asoc_simple_init_dai_link_params(rtd, dai_props);
    	if (ret < 0)
    		return ret;
    
    	return 0;
    }
    EXPORT_SYMBOL_GPL(asoc_simple_dai_init);
    
    void asoc_simple_canonicalize_platform(struct snd_soc_dai_link *dai_link)
    {
    	/* Assumes platform == cpu */
    	if (!dai_link->platforms->of_node)
    		dai_link->platforms->of_node = dai_link->cpus->of_node;
    
    	/*
    	 * DPCM BE can be no platform.
    	 * Alloced memory will be waste, but not leak.
    	 */
    	if (!dai_link->platforms->of_node)
    		dai_link->num_platforms = 0;
    }
    EXPORT_SYMBOL_GPL(asoc_simple_canonicalize_platform);
    
    void asoc_simple_canonicalize_cpu(struct snd_soc_dai_link *dai_link,
    				  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)
    		dai_link->cpus->dai_name = NULL;
    }
    EXPORT_SYMBOL_GPL(asoc_simple_canonicalize_cpu);
    
    int asoc_simple_clean_reference(struct snd_soc_card *card)
    {
    	struct snd_soc_dai_link *dai_link;
    	int i;
    
    	for_each_card_prelinks(card, i, dai_link) {
    		of_node_put(dai_link->cpus->of_node);
    		of_node_put(dai_link->codecs->of_node);
    	}
    	return 0;
    }
    EXPORT_SYMBOL_GPL(asoc_simple_clean_reference);
    
    int asoc_simple_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_read_bool(node, prop))
    		return 0;
    
    	return snd_soc_of_parse_audio_routing(card, prop);
    }
    EXPORT_SYMBOL_GPL(asoc_simple_parse_routing);
    
    int asoc_simple_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_read_bool(node, prop))
    		return snd_soc_of_parse_audio_simple_widgets(card, prop);
    
    	/* no widgets is not error */
    	return 0;
    }
    EXPORT_SYMBOL_GPL(asoc_simple_parse_widgets);
    
    int asoc_simple_parse_pin_switches(struct snd_soc_card *card,
    				   char *prefix)
    {
    	const unsigned int nb_controls_max = 16;
    	const char **strings, *control_name;
    	struct snd_kcontrol_new *controls;
    	struct device *dev = card->dev;
    	unsigned int i, nb_controls;
    	char prop[128];
    	int ret;
    
    	if (!prefix)
    		prefix = "";
    
    	snprintf(prop, sizeof(prop), "%s%s", prefix, "pin-switches");
    
    	if (!of_property_read_bool(dev->of_node, prop))
    		return 0;
    
    	strings = devm_kcalloc(dev, nb_controls_max,
    			       sizeof(*strings), GFP_KERNEL);
    	if (!strings)
    		return -ENOMEM;
    
    	ret = of_property_read_string_array(dev->of_node, prop,
    					    strings, nb_controls_max);
    	if (ret < 0)
    		return ret;
    
    	nb_controls = (unsigned int)ret;
    
    	controls = devm_kcalloc(dev, nb_controls,
    				sizeof(*controls), GFP_KERNEL);
    	if (!controls)
    		return -ENOMEM;
    
    	for (i = 0; i < nb_controls; i++) {
    		control_name = devm_kasprintf(dev, GFP_KERNEL,
    					      "%s Switch", strings[i]);
    		if (!control_name)
    			return -ENOMEM;
    
    		controls[i].iface = SNDRV_CTL_ELEM_IFACE_MIXER;
    		controls[i].name = control_name;
    		controls[i].info = snd_soc_dapm_info_pin_switch;
    		controls[i].get = snd_soc_dapm_get_pin_switch;
    		controls[i].put = snd_soc_dapm_put_pin_switch;
    		controls[i].private_value = (unsigned long)strings[i];
    	}
    
    	card->controls = controls;
    	card->num_controls = nb_controls;
    
    	return 0;
    }
    EXPORT_SYMBOL_GPL(asoc_simple_parse_pin_switches);
    
    int asoc_simple_init_jack(struct snd_soc_card *card,
    			  struct asoc_simple_jack *sjack,
    			  int is_hp, char *prefix,
    			  char *pin)
    {
    	struct device *dev = card->dev;
    	enum of_gpio_flags flags;
    	char prop[128];
    	char *pin_name;
    	char *gpio_name;
    	int mask;
    	int det;
    
    	if (!prefix)
    		prefix = "";
    
    	sjack->gpio.gpio = -ENOENT;
    
    	if (is_hp) {
    		snprintf(prop, sizeof(prop), "%shp-det-gpio", prefix);
    		pin_name	= pin ? pin : "Headphones";
    		gpio_name	= "Headphone detection";
    		mask		= SND_JACK_HEADPHONE;
    	} else {
    		snprintf(prop, sizeof(prop), "%smic-det-gpio", prefix);
    		pin_name	= pin ? pin : "Mic Jack";
    		gpio_name	= "Mic detection";
    		mask		= SND_JACK_MICROPHONE;
    	}
    
    	det = of_get_named_gpio_flags(dev->of_node, prop, 0, &flags);
    	if (det == -EPROBE_DEFER)
    		return -EPROBE_DEFER;
    
    	if (gpio_is_valid(det)) {
    		sjack->pin.pin		= pin_name;
    		sjack->pin.mask		= mask;
    
    		sjack->gpio.name	= gpio_name;
    		sjack->gpio.report	= mask;
    		sjack->gpio.gpio	= det;
    		sjack->gpio.invert	= !!(flags & OF_GPIO_ACTIVE_LOW);
    		sjack->gpio.debounce_time = 150;
    
    		snd_soc_card_jack_new(card, pin_name, mask,
    				      &sjack->jack,
    				      &sjack->pin, 1);
    
    		snd_soc_jack_add_gpios(&sjack->jack, 1,
    				       &sjack->gpio);
    	}
    
    	return 0;
    }
    EXPORT_SYMBOL_GPL(asoc_simple_init_jack);
    
    int asoc_simple_init_priv(struct asoc_simple_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 asoc_simple_dai *dais;
    	struct snd_soc_dai_link_component *dlcs;
    	struct snd_soc_codec_conf *cconf = NULL;
    	int i, dai_num = 0, dlc_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;
    	}
    
    	dais = devm_kcalloc(dev, dai_num, sizeof(*dais),      GFP_KERNEL);
    	dlcs = devm_kcalloc(dev, dlc_num, sizeof(*dai_props), GFP_KERNEL);
    	if (!dais || !dlcs)
    		return -ENOMEM;
    
    	if (li->conf) {
    		cconf = devm_kcalloc(dev, li->conf, sizeof(*cconf), GFP_KERNEL);
    		if (!cconf)
    			return -ENOMEM;
    	}
    
    	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	= li->conf;
    
    	for (i = 0; i < li->link; i++) {
    		if (li->num[i].cpus) {
    			/* Normal CPU */
    			dai_props[i].cpus	=
    			dai_link[i].cpus	= dlcs;
    			dai_props[i].num.cpus	=
    			dai_link[i].num_cpus	= li->num[i].cpus;
    
    			dlcs += li->num[i].cpus;
    		}
    
    		if (li->num[i].codecs) {
    			/* Normal Codec */
    			dai_props[i].codecs	=
    			dai_link[i].codecs	= dlcs;
    			dai_props[i].num.codecs	=
    			dai_link[i].num_codecs	= li->num[i].codecs;
    
    			dlcs += li->num[i].codecs;
    		}
    
    		if (li->num[i].platforms) {
    			/* Have Platform */
    			dai_props[i].platforms		=
    			dai_link[i].platforms		= dlcs;
    			dai_props[i].num.platforms	=
    			dai_link[i].num_platforms	= li->num[i].platforms;
    
    			dlcs += li->num[i].platforms;
    		}
    	}
    
    	return 0;
    }
    EXPORT_SYMBOL_GPL(asoc_simple_init_priv);
    
    /* Module information */
    MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
    MODULE_DESCRIPTION("ALSA SoC Simple Card Utils");
    MODULE_LICENSE("GPL v2");