sound/soc/amlogic/auge/card_utils.c - manifest_repos/kernel - Git at Google

 /*
  * sound/soc/amlogic/auge/card_utils.c
  *
  * Copyright (C) 2017 Amlogic, Inc. All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; either version 2 of the License, or
  * (at your option) any later version.
  *
  * 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.
  *
  */

 #include <linux/clk.h>
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/kernel.h>

 #include "card_utils.h"

 int aml_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;
 }

 int aml_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;
 }

 int aml_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;
 }

 int aml_card_parse_clk(struct device_node *node,
 			struct device_node *dai_of_node,
 			struct aml_dai *aml_dai)
 {
 	struct clk *clk;
 	u32 val = 0;

 	/*
 	 * Parse dai->sysclk come from "clocks = <&xxx>"
 	 * (if system has common clock)
 	 *  and "system-clock-frequency = <xxx>".
 	 */
 	clk = of_clk_get(node, 0);
 	if (IS_ERR(clk))
 		clk = of_clk_get(dai_of_node, 0);

 	if (!IS_ERR(clk)) {
 		of_property_read_u32(node,
 			"system-clock-frequency", &val);
 		if (val == 0)
 			val = clk_get_rate(clk);

 		aml_dai->clk = clk;
 		aml_dai->sysclk = val;
 	}

 	return 0;
 }

 int aml_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;
 }

 /* new allocated size must greater than older size */
 static void *aml_card_confs_krealloc(struct snd_soc_card *card,
 			size_t new_size)
 {
 	void *ret, *p;
 	size_t old_size = 0;
 	struct device *dev = card->dev;

 	p = card->codec_conf;
 	old_size = card->num_configs * sizeof(*card->codec_conf);
 	if (new_size < old_size)
 		return NULL;

 	ret = devm_kzalloc(dev, new_size, GFP_KERNEL);

 	if (ret && p) {
 		memcpy(ret, p, old_size);
 		if (p != ret)
 			devm_kfree(dev, p);

 		card->codec_conf = ret;
 	}

 	return ret;
 }

 int aml_card_parse_codec_confs(struct device_node *codec_np,
 			struct snd_soc_card *card)
 {
 	struct snd_soc_codec_conf *confs;
 	int num_new_confs, num_saved_confs, new_size;
 	int i = 0, ret = 0;

 	num_new_confs = of_property_count_strings(codec_np, "prefix-names");
 	if (num_new_confs <= 0)
 		return 0;

 	num_saved_confs = card->num_configs;
 	new_size = sizeof(*confs) * (num_new_confs + num_saved_confs);
 	confs = aml_card_confs_krealloc(card, new_size);
 	if (!confs) {
 		ret = -ENOMEM;
 		goto codec_confs_end;
 	}

 	/*
 	 * parse "prefix-names" and "sound-dai" pair
 	 * add codec_conf by these two items
 	 */
 	for (i = 0; i < num_new_confs; i++) {
 		ret = of_property_read_string_index(codec_np, "prefix-names", i,
 				&confs[num_saved_confs + i].name_prefix);
 		if (ret < 0)
 			goto codec_confs_end;

 		confs[num_saved_confs + i].of_node =
 				of_parse_phandle(codec_np, "sound-dai", i);
 		if (!confs[num_saved_confs + i].of_node) {
 			ret = -ENODATA;
 			goto codec_confs_end;
 		}
 	}

 	card->codec_conf = confs;
 	card->num_configs += num_new_confs;

 codec_confs_end:

 	return ret;
 }

 int aml_card_init_dai(struct snd_soc_dai *dai,
 			struct aml_dai *aml_dai, bool cont_clk)
 {
 	int ret;

 	if (aml_dai->sysclk && cont_clk) {
 		ret = snd_soc_dai_set_sysclk(dai, 0, aml_dai->sysclk, 0);
 		if (ret && ret != -ENOTSUPP) {
 			dev_err(dai->dev, "aml-card: set_sysclk error\n");
 			return ret;
 		}
 	}

 	if (aml_dai->slots) {
 		ret = snd_soc_dai_set_tdm_slot(dai,
 					       aml_dai->tx_slot_mask,
 					       aml_dai->rx_slot_mask,
 					       aml_dai->slots,
 					       aml_dai->slot_width);
 		if (ret && ret != -ENOTSUPP) {
 			dev_err(dai->dev, "aml-card: set_tdm_slot error\n");
 			return ret;
 		}
 	}

 	return 0;
 }

 int aml_card_canonicalize_dailink(struct snd_soc_dai_link *dai_link)
 {
 	if (!dai_link->cpu_dai_name ||
 			(!dai_link->codec_dai_name && !dai_link->codecs))
 		return -EINVAL;

 	/* Assumes platform == cpu */
 	if (!dai_link->platform_of_node)
 		dai_link->platform_of_node = dai_link->cpu_of_node;

 	return 0;
 }

 void aml_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;
 }

 int aml_card_clean_reference(struct snd_soc_card *card)
 {
 	struct snd_soc_dai_link *dai_link;
 	struct snd_soc_codec_conf *codec_conf;
 	int num_links, num_confs;

 	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);
 	}

 	for (num_confs = 0, codec_conf = card->codec_conf;
 		num_confs < card->num_configs;
 		num_confs++, codec_conf++) {
 		of_node_put(codec_conf->of_node);
 	}

 	return 0;
 }

 int aml_card_add_controls(struct snd_soc_card *card)
 {
 	int ret;

 	ret = snd_card_add_kcontrols(card);
 	if (ret < 0) {
 		pr_info("failed register kcontrols\n");
 		return ret;
 	}

 	return 0;
 }
	/*
	* sound/soc/amlogic/auge/card_utils.c
	*
	* Copyright (C) 2017 Amlogic, Inc. All rights reserved.
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation; either version 2 of the License, or
	* (at your option) any later version.
	*
	* 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.
	*
	*/

	#include <linux/clk.h>
	#include <linux/module.h>
	#include <linux/of.h>
	#include <linux/kernel.h>

	#include "card_utils.h"

	int aml_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;
	}

	int aml_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;
	}

	int aml_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;
	}

	int aml_card_parse_clk(struct device_node *node,
	struct device_node *dai_of_node,
	struct aml_dai *aml_dai)
	{
	struct clk *clk;
	u32 val = 0;

	/*
	* Parse dai->sysclk come from "clocks = <&xxx>"
	* (if system has common clock)
	* and "system-clock-frequency = <xxx>".
	*/
	clk = of_clk_get(node, 0);
	if (IS_ERR(clk))
	clk = of_clk_get(dai_of_node, 0);

	if (!IS_ERR(clk)) {
	of_property_read_u32(node,
	"system-clock-frequency", &val);
	if (val == 0)
	val = clk_get_rate(clk);

	aml_dai->clk = clk;
	aml_dai->sysclk = val;
	}

	return 0;
	}

	int aml_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;
	}

	/* new allocated size must greater than older size */
	static void aml_card_confs_krealloc(struct snd_soc_card card,
	size_t new_size)
	{
	void ret, p;
	size_t old_size = 0;
	struct device *dev = card->dev;

	p = card->codec_conf;
	old_size = card->num_configs * sizeof(*card->codec_conf);
	if (new_size < old_size)
	return NULL;

	ret = devm_kzalloc(dev, new_size, GFP_KERNEL);

	if (ret && p) {
	memcpy(ret, p, old_size);
	if (p != ret)
	devm_kfree(dev, p);

	card->codec_conf = ret;
	}

	return ret;
	}

	int aml_card_parse_codec_confs(struct device_node *codec_np,
	struct snd_soc_card *card)
	{
	struct snd_soc_codec_conf *confs;
	int num_new_confs, num_saved_confs, new_size;
	int i = 0, ret = 0;

	num_new_confs = of_property_count_strings(codec_np, "prefix-names");
	if (num_new_confs <= 0)
	return 0;

	num_saved_confs = card->num_configs;
	new_size = sizeof(confs) (num_new_confs + num_saved_confs);
	confs = aml_card_confs_krealloc(card, new_size);
	if (!confs) {
	ret = -ENOMEM;
	goto codec_confs_end;
	}

	/*
	* parse "prefix-names" and "sound-dai" pair
	* add codec_conf by these two items
	*/
	for (i = 0; i < num_new_confs; i++) {
	ret = of_property_read_string_index(codec_np, "prefix-names", i,
	&confs[num_saved_confs + i].name_prefix);
	if (ret < 0)
	goto codec_confs_end;

	confs[num_saved_confs + i].of_node =
	of_parse_phandle(codec_np, "sound-dai", i);
	if (!confs[num_saved_confs + i].of_node) {
	ret = -ENODATA;
	goto codec_confs_end;
	}
	}

	card->codec_conf = confs;
	card->num_configs += num_new_confs;

	codec_confs_end:

	return ret;
	}

	int aml_card_init_dai(struct snd_soc_dai *dai,
	struct aml_dai *aml_dai, bool cont_clk)
	{
	int ret;

	if (aml_dai->sysclk && cont_clk) {
	ret = snd_soc_dai_set_sysclk(dai, 0, aml_dai->sysclk, 0);
	if (ret && ret != -ENOTSUPP) {
	dev_err(dai->dev, "aml-card: set_sysclk error\n");
	return ret;
	}
	}

	if (aml_dai->slots) {
	ret = snd_soc_dai_set_tdm_slot(dai,
	aml_dai->tx_slot_mask,
	aml_dai->rx_slot_mask,
	aml_dai->slots,
	aml_dai->slot_width);
	if (ret && ret != -ENOTSUPP) {
	dev_err(dai->dev, "aml-card: set_tdm_slot error\n");
	return ret;
	}
	}

	return 0;
	}

	int aml_card_canonicalize_dailink(struct snd_soc_dai_link *dai_link)
	{
	if (!dai_link->cpu_dai_name \|\|
	(!dai_link->codec_dai_name && !dai_link->codecs))
	return -EINVAL;

	/* Assumes platform == cpu */
	if (!dai_link->platform_of_node)
	dai_link->platform_of_node = dai_link->cpu_of_node;

	return 0;
	}

	void aml_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;
	}

	int aml_card_clean_reference(struct snd_soc_card *card)
	{
	struct snd_soc_dai_link *dai_link;
	struct snd_soc_codec_conf *codec_conf;
	int num_links, num_confs;

	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);
	}

	for (num_confs = 0, codec_conf = card->codec_conf;
	num_confs < card->num_configs;
	num_confs++, codec_conf++) {
	of_node_put(codec_conf->of_node);
	}

	return 0;
	}

	int aml_card_add_controls(struct snd_soc_card *card)
	{
	int ret;

	ret = snd_card_add_kcontrols(card);
	if (ret < 0) {
	pr_info("failed register kcontrols\n");
	return ret;
	}

	return 0;
	}