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// SPDX-License-Identifier: GPL-2.0
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// Copyright (c) 2016 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
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#include <linux/gpio.h>
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#include <linux/gpio/consumer.h>
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#include <linux/module.h>
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#include <linux/of_gpio.h>
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#include <linux/of_graph.h>
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#include <sound/jack.h>
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#include <sound/simple_card_utils.h>
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void asoc_simple_convert_fixup(struct asoc_simple_data *data,
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struct snd_pcm_hw_params *params)
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struct snd_interval *rate = hw_param_interval(params,
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SNDRV_PCM_HW_PARAM_RATE);
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struct snd_interval *channels = hw_param_interval(params,
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SNDRV_PCM_HW_PARAM_CHANNELS);
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if (data->convert_rate)
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rate->max = data->convert_rate;
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if (data->convert_channels)
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channels->max = data->convert_channels;
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EXPORT_SYMBOL_GPL(asoc_simple_convert_fixup);
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void asoc_simple_parse_convert(struct device *dev,
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struct device_node *np,
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struct asoc_simple_data *data)
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/* sampling rate convert */
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snprintf(prop, sizeof(prop), "%s%s", prefix, "convert-rate");
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of_property_read_u32(np, prop, &data->convert_rate);
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/* channels transfer */
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snprintf(prop, sizeof(prop), "%s%s", prefix, "convert-channels");
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of_property_read_u32(np, prop, &data->convert_channels);
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EXPORT_SYMBOL_GPL(asoc_simple_parse_convert);
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int asoc_simple_parse_daifmt(struct device *dev,
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struct device_node *node,
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struct device_node *codec,
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struct device_node *bitclkmaster = NULL;
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struct device_node *framemaster = NULL;
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daifmt = snd_soc_of_parse_daifmt(node, prefix,
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&bitclkmaster, &framemaster);
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daifmt &= ~SND_SOC_DAIFMT_MASTER_MASK;
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if (!bitclkmaster && !framemaster) {
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* No dai-link level and master setting was not found from
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* sound node level, revert back to legacy DT parsing and
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* take the settings from codec node.
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dev_dbg(dev, "Revert to legacy daifmt parsing\n");
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daifmt = snd_soc_of_parse_daifmt(codec, NULL, NULL, NULL) |
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(daifmt & ~SND_SOC_DAIFMT_CLOCK_MASK);
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if (codec == bitclkmaster)
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daifmt |= (codec == framemaster) ?
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SND_SOC_DAIFMT_CBM_CFM : SND_SOC_DAIFMT_CBM_CFS;
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daifmt |= (codec == framemaster) ?
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SND_SOC_DAIFMT_CBS_CFM : SND_SOC_DAIFMT_CBS_CFS;
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of_node_put(bitclkmaster);
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of_node_put(framemaster);
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EXPORT_SYMBOL_GPL(asoc_simple_parse_daifmt);
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int asoc_simple_set_dailink_name(struct device *dev,
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struct snd_soc_dai_link *dai_link,
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name = devm_kvasprintf(dev, GFP_KERNEL, fmt, ap);
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dai_link->name = name;
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dai_link->stream_name = name;
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EXPORT_SYMBOL_GPL(asoc_simple_set_dailink_name);
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int asoc_simple_parse_card_name(struct snd_soc_card *card,
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/* Parse the card name from DT */
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ret = snd_soc_of_parse_card_name(card, "label");
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if (ret < 0 || !card->name) {
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snprintf(prop, sizeof(prop), "%sname", prefix);
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ret = snd_soc_of_parse_card_name(card, prop);
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if (!card->name && card->dai_link)
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card->name = card->dai_link->name;
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EXPORT_SYMBOL_GPL(asoc_simple_parse_card_name);
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static int asoc_simple_clk_enable(struct asoc_simple_dai *dai)
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return clk_prepare_enable(dai->clk);
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static void asoc_simple_clk_disable(struct asoc_simple_dai *dai)
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clk_disable_unprepare(dai->clk);
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int asoc_simple_parse_clk(struct device *dev,
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struct device_node *node,
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struct asoc_simple_dai *simple_dai,
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struct snd_soc_dai_link_component *dlc)
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* Parse dai->sysclk come from "clocks = <&xxx>"
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* (if system has common clock)
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* or "system-clock-frequency = <xxx>"
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* or device's module clock.
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clk = devm_get_clk_from_child(dev, node, NULL);
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simple_dai->sysclk = clk_get_rate(clk);
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simple_dai->clk = clk;
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} else if (!of_property_read_u32(node, "system-clock-frequency", &val)) {
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simple_dai->sysclk = val;
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clk = devm_get_clk_from_child(dev, dlc->of_node, NULL);
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simple_dai->sysclk = clk_get_rate(clk);
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if (of_property_read_bool(node, "system-clock-direction-out"))
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simple_dai->clk_direction = SND_SOC_CLOCK_OUT;
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EXPORT_SYMBOL_GPL(asoc_simple_parse_clk);
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int asoc_simple_startup(struct snd_pcm_substream *substream)
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct asoc_simple_priv *priv = snd_soc_card_get_drvdata(rtd->card);
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struct simple_dai_props *dai_props = simple_priv_to_props(priv, rtd->num);
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ret = asoc_simple_clk_enable(dai_props->cpu_dai);
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ret = asoc_simple_clk_enable(dai_props->codec_dai);
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asoc_simple_clk_disable(dai_props->cpu_dai);
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EXPORT_SYMBOL_GPL(asoc_simple_startup);
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void asoc_simple_shutdown(struct snd_pcm_substream *substream)
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_soc_dai *codec_dai = rtd->codec_dai;
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struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
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struct asoc_simple_priv *priv = snd_soc_card_get_drvdata(rtd->card);
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struct simple_dai_props *dai_props =
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simple_priv_to_props(priv, rtd->num);
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if (dai_props->mclk_fs) {
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snd_soc_dai_set_sysclk(codec_dai, 0, 0, SND_SOC_CLOCK_IN);
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snd_soc_dai_set_sysclk(cpu_dai, 0, 0, SND_SOC_CLOCK_OUT);
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asoc_simple_clk_disable(dai_props->cpu_dai);
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asoc_simple_clk_disable(dai_props->codec_dai);
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EXPORT_SYMBOL_GPL(asoc_simple_shutdown);
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static int asoc_simple_set_clk_rate(struct asoc_simple_dai *simple_dai,
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if (!simple_dai->clk)
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if (clk_get_rate(simple_dai->clk) == rate)
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return clk_set_rate(simple_dai->clk, rate);
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int asoc_simple_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params)
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_soc_dai *codec_dai = rtd->codec_dai;
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struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
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struct asoc_simple_priv *priv = snd_soc_card_get_drvdata(rtd->card);
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struct simple_dai_props *dai_props =
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simple_priv_to_props(priv, rtd->num);
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unsigned int mclk, mclk_fs = 0;
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if (dai_props->mclk_fs)
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mclk_fs = dai_props->mclk_fs;
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mclk = params_rate(params) * mclk_fs;
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ret = asoc_simple_set_clk_rate(dai_props->codec_dai, mclk);
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ret = asoc_simple_set_clk_rate(dai_props->cpu_dai, mclk);
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ret = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
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if (ret && ret != -ENOTSUPP)
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ret = snd_soc_dai_set_sysclk(cpu_dai, 0, mclk,
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if (ret && ret != -ENOTSUPP)
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EXPORT_SYMBOL_GPL(asoc_simple_hw_params);
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int asoc_simple_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
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struct snd_pcm_hw_params *params)
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struct asoc_simple_priv *priv = snd_soc_card_get_drvdata(rtd->card);
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struct simple_dai_props *dai_props = simple_priv_to_props(priv, rtd->num);
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asoc_simple_convert_fixup(&dai_props->adata, params);
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EXPORT_SYMBOL_GPL(asoc_simple_be_hw_params_fixup);
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static int asoc_simple_init_dai(struct snd_soc_dai *dai,
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struct asoc_simple_dai *simple_dai)
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if (simple_dai->sysclk) {
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ret = snd_soc_dai_set_sysclk(dai, 0, simple_dai->sysclk,
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simple_dai->clk_direction);
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if (ret && ret != -ENOTSUPP) {
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dev_err(dai->dev, "simple-card: set_sysclk error\n");
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if (simple_dai->slots) {
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ret = snd_soc_dai_set_tdm_slot(dai,
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simple_dai->tx_slot_mask,
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simple_dai->rx_slot_mask,
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simple_dai->slot_width);
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if (ret && ret != -ENOTSUPP) {
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dev_err(dai->dev, "simple-card: set_tdm_slot error\n");
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int asoc_simple_dai_init(struct snd_soc_pcm_runtime *rtd)
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struct asoc_simple_priv *priv = snd_soc_card_get_drvdata(rtd->card);
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struct simple_dai_props *dai_props = simple_priv_to_props(priv, rtd->num);
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ret = asoc_simple_init_dai(rtd->codec_dai,
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dai_props->codec_dai);
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ret = asoc_simple_init_dai(rtd->cpu_dai,
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EXPORT_SYMBOL_GPL(asoc_simple_dai_init);
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void asoc_simple_canonicalize_platform(struct snd_soc_dai_link *dai_link)
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/* Assumes platform == cpu */
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if (!dai_link->platforms->of_node)
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dai_link->platforms->of_node = dai_link->cpus->of_node;
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* DPCM BE can be no platform.
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* Alloced memory will be waste, but not leak.
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if (!dai_link->platforms->of_node)
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dai_link->num_platforms = 0;
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EXPORT_SYMBOL_GPL(asoc_simple_canonicalize_platform);
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void asoc_simple_canonicalize_cpu(struct snd_soc_dai_link *dai_link,
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* In soc_bind_dai_link() will check cpu name after
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* of_node matching if dai_link has cpu_dai_name.
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* but, it will never match if name was created by
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* fmt_single_name() remove cpu_dai_name if cpu_args
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* fmt_multiple_name()
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dai_link->cpus->dai_name = NULL;
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EXPORT_SYMBOL_GPL(asoc_simple_canonicalize_cpu);
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int asoc_simple_clean_reference(struct snd_soc_card *card)
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struct snd_soc_dai_link *dai_link;
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for_each_card_prelinks(card, i, dai_link) {
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of_node_put(dai_link->cpus->of_node);
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of_node_put(dai_link->codecs->of_node);
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EXPORT_SYMBOL_GPL(asoc_simple_clean_reference);
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int asoc_simple_parse_routing(struct snd_soc_card *card,
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struct device_node *node = card->dev->of_node;
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snprintf(prop, sizeof(prop), "%s%s", prefix, "routing");
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if (!of_property_read_bool(node, prop))
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return snd_soc_of_parse_audio_routing(card, prop);
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EXPORT_SYMBOL_GPL(asoc_simple_parse_routing);
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int asoc_simple_parse_widgets(struct snd_soc_card *card,
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struct device_node *node = card->dev->of_node;
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snprintf(prop, sizeof(prop), "%s%s", prefix, "widgets");
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if (of_property_read_bool(node, prop))
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return snd_soc_of_parse_audio_simple_widgets(card, prop);
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/* no widgets is not error */
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EXPORT_SYMBOL_GPL(asoc_simple_parse_widgets);
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int asoc_simple_parse_pin_switches(struct snd_soc_card *card,
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const unsigned int nb_controls_max = 16;
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const char **strings, *control_name;
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struct snd_kcontrol_new *controls;
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struct device *dev = card->dev;
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unsigned int i, nb_controls;
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snprintf(prop, sizeof(prop), "%s%s", prefix, "pin-switches");
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if (!of_property_read_bool(dev->of_node, prop))
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strings = devm_kcalloc(dev, nb_controls_max,
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sizeof(*strings), GFP_KERNEL);
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ret = of_property_read_string_array(dev->of_node, prop,
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strings, nb_controls_max);
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nb_controls = (unsigned int)ret;
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controls = devm_kcalloc(dev, nb_controls,
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sizeof(*controls), GFP_KERNEL);
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for (i = 0; i < nb_controls; i++) {
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control_name = devm_kasprintf(dev, GFP_KERNEL,
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"%s Switch", strings[i]);
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controls[i].iface = SNDRV_CTL_ELEM_IFACE_MIXER;
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controls[i].name = control_name;
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controls[i].info = snd_soc_dapm_info_pin_switch;
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controls[i].get = snd_soc_dapm_get_pin_switch;
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controls[i].put = snd_soc_dapm_put_pin_switch;
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controls[i].private_value = (unsigned long)strings[i];
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card->controls = controls;
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card->num_controls = nb_controls;
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EXPORT_SYMBOL_GPL(asoc_simple_parse_pin_switches);
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int asoc_simple_init_jack(struct snd_soc_card *card,
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struct asoc_simple_jack *sjack,
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int is_hp, char *prefix)
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struct device *dev = card->dev;
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enum of_gpio_flags flags;
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sjack->gpio.gpio = -ENOENT;
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snprintf(prop, sizeof(prop), "%shp-det-gpio", prefix);
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pin_name = "Headphones";
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gpio_name = "Headphone detection";
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mask = SND_JACK_HEADPHONE;
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snprintf(prop, sizeof(prop), "%smic-det-gpio", prefix);
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pin_name = "Mic Jack";
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gpio_name = "Mic detection";
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mask = SND_JACK_MICROPHONE;
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det = of_get_named_gpio_flags(dev->of_node, prop, 0, &flags);
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if (det == -EPROBE_DEFER)
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return -EPROBE_DEFER;
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if (gpio_is_valid(det)) {
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sjack->pin.pin = pin_name;
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sjack->pin.mask = mask;
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sjack->gpio.name = gpio_name;
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sjack->gpio.report = mask;
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sjack->gpio.gpio = det;
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sjack->gpio.invert = !!(flags & OF_GPIO_ACTIVE_LOW);
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sjack->gpio.debounce_time = 150;
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snd_soc_card_jack_new(card, pin_name, mask,
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snd_soc_jack_add_gpios(&sjack->jack, 1,
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EXPORT_SYMBOL_GPL(asoc_simple_init_jack);
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int asoc_simple_init_priv(struct asoc_simple_priv *priv,
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struct link_info *li)
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struct snd_soc_card *card = simple_priv_to_card(priv);
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struct device *dev = simple_priv_to_dev(priv);
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struct snd_soc_dai_link *dai_link;
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struct simple_dai_props *dai_props;
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struct asoc_simple_dai *dais;
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struct snd_soc_codec_conf *cconf = NULL;
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dai_props = devm_kcalloc(dev, li->link, sizeof(*dai_props), GFP_KERNEL);
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dai_link = devm_kcalloc(dev, li->link, sizeof(*dai_link), GFP_KERNEL);
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dais = devm_kcalloc(dev, li->dais, sizeof(*dais), GFP_KERNEL);
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if (!dai_props || !dai_link || !dais)
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cconf = devm_kcalloc(dev, li->conf, sizeof(*cconf), GFP_KERNEL);
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* Use snd_soc_dai_link_component instead of legacy style
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* It is codec only. but cpu/platform will be supported in the future.
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* soc-core.c :: snd_soc_init_multicodec()
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* "platform" might be removed
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* simple-card-utils.c :: asoc_simple_canonicalize_platform()
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for (i = 0; i < li->link; i++) {
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dai_link[i].cpus = &dai_props[i].cpus;
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dai_link[i].num_cpus = 1;
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dai_link[i].codecs = &dai_props[i].codecs;
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dai_link[i].num_codecs = 1;
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dai_link[i].platforms = &dai_props[i].platforms;
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dai_link[i].num_platforms = 1;
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priv->dai_props = dai_props;
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priv->dai_link = dai_link;
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priv->codec_conf = cconf;
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card->dai_link = priv->dai_link;
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card->num_links = li->link;
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card->codec_conf = cconf;
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card->num_configs = li->conf;
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EXPORT_SYMBOL_GPL(asoc_simple_init_priv);
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/* Module information */
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MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
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MODULE_DESCRIPTION("ALSA SoC Simple Card Utils");
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MODULE_LICENSE("GPL v2");