/*
 * simple-card-utils.c
 *
 * Copyright (c) 2016 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
 *
 * 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.
 */
#include <linux/clk.h>
#include <linux/module.h>
#include <linux/of.h>
#include <sound/simple_card_utils.h>

int asoc_simple_card_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;
	int prefix_len = prefix ? strlen(prefix) : 0;
	unsigned int daifmt;

	daifmt = snd_soc_of_parse_daifmt(node, prefix,
					 &bitclkmaster, &framemaster);
	daifmt &= ~SND_SOC_DAIFMT_MASTER_MASK;

	if (prefix_len && !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_card_parse_daifmt);

int asoc_simple_card_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_card_set_dailink_name);

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

	snprintf(prop, sizeof(prop), "%sname", prefix);

	/* Parse the card name from DT */
	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_card_parse_card_name);

int asoc_simple_card_parse_clk(struct device_node *node,
			       struct device_node *dai_of_node,
			       struct asoc_simple_dai *simple_dai)
{
	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 = of_clk_get(node, 0);
	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 = of_clk_get(dai_of_node, 0);
		if (!IS_ERR(clk))
			simple_dai->sysclk = clk_get_rate(clk);
	}

	return 0;
}
EXPORT_SYMBOL_GPL(asoc_simple_card_parse_clk);

int asoc_simple_card_parse_dai(struct device_node *node,
				    struct device_node **dai_of_node,
				    const char **dai_name,
				    const char *list_name,
				    const char *cells_name,
				    int *is_single_link)
{
	struct of_phandle_args args;
	int ret;

	if (!node)
		return 0;

	/*
	 * Get node via "sound-dai = <&phandle port>"
	 * it will be used as xxx_of_node on soc_bind_dai_link()
	 */
	ret = of_parse_phandle_with_args(node, list_name, cells_name, 0, &args);
	if (ret)
		return ret;

	/* Get dai->name */
	if (dai_name) {
		ret = snd_soc_of_get_dai_name(node, dai_name);
		if (ret < 0)
			return ret;
	}

	*dai_of_node = args.np;

	if (is_single_link)
		*is_single_link = !args.args_count;

	return 0;
}
EXPORT_SYMBOL_GPL(asoc_simple_card_parse_dai);

int asoc_simple_card_init_dai(struct snd_soc_dai *dai,
			      struct asoc_simple_dai *simple_dai)
{
	int ret;

	if (simple_dai->sysclk) {
		ret = snd_soc_dai_set_sysclk(dai, 0, simple_dai->sysclk, 0);
		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;
}
EXPORT_SYMBOL_GPL(asoc_simple_card_init_dai);

int asoc_simple_card_canonicalize_dailink(struct snd_soc_dai_link *dai_link)
{
	/* Assumes platform == cpu */
	if (!dai_link->platform_of_node)
		dai_link->platform_of_node = dai_link->cpu_of_node;

	return 0;
}
EXPORT_SYMBOL_GPL(asoc_simple_card_canonicalize_dailink);

void asoc_simple_card_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->cpu_dai_name = NULL;
}
EXPORT_SYMBOL_GPL(asoc_simple_card_canonicalize_cpu);

int asoc_simple_card_clean_reference(struct snd_soc_card *card)
{
	struct snd_soc_dai_link *dai_link;
	int num_links;

	for (num_links = 0, dai_link = card->dai_link;
	     num_links < card->num_links;
	     num_links++, dai_link++) {
		of_node_put(dai_link->cpu_of_node);
		of_node_put(dai_link->codec_of_node);
	}
	return 0;
}
EXPORT_SYMBOL_GPL(asoc_simple_card_clean_reference);

/* Module information */
MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
MODULE_DESCRIPTION("ALSA SoC Simple Card Utils");
MODULE_LICENSE("GPL v2");
C8805 which will by
default boot with vid 0x413c and pid 0x81a3. When triggered QDL download
mode, the device switches to pid 0x81a6 and provides the standard TTY
used for firmware upgrade.

Cc: &lt;stable@vger.kernel.org&gt;
Signed-off-by: Aleksander Morgado &lt;aleksander@aleksander.es&gt;
Signed-off-by: Johan Hovold &lt;johan@kernel.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=24d615a694d649aa2e167c3f97f62bdad07e3f84'>Diffstat</a> (limited to 'sound/firewire/digi00x')</div><table summary='diffstat' class='diffstat'>