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bd029fc868
cppcheck warning: sound/soc/generic/simple-card-utils.c:258:10: style: Variable 'ret' is assigned a value that is never used. [unreadVariable] int ret = 0; ^ Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Link: https://lore.kernel.org/r/20210218221921.88991-7-pierre-louis.bossart@linux.intel.com Signed-off-by: Mark Brown <broonie@kernel.org>
656 lines
16 KiB
C
656 lines
16 KiB
C
// SPDX-License-Identifier: GPL-2.0
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//
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// simple-card-utils.c
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//
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// Copyright (c) 2016 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
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#include <linux/clk.h>
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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.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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{
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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->min =
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rate->max = data->convert_rate;
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if (data->convert_channels)
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channels->min =
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channels->max = data->convert_channels;
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}
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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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char *prefix,
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struct asoc_simple_data *data)
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{
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char prop[128];
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if (!prefix)
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prefix = "";
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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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}
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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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char *prefix,
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unsigned int *retfmt)
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{
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struct device_node *bitclkmaster = NULL;
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struct device_node *framemaster = NULL;
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unsigned int daifmt;
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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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/*
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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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*/
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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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} else {
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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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else
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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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}
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of_node_put(bitclkmaster);
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of_node_put(framemaster);
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*retfmt = daifmt;
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return 0;
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}
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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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const char *fmt, ...)
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{
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va_list ap;
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char *name = NULL;
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int ret = -ENOMEM;
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va_start(ap, fmt);
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name = devm_kvasprintf(dev, GFP_KERNEL, fmt, ap);
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va_end(ap);
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if (name) {
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ret = 0;
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dai_link->name = name;
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dai_link->stream_name = name;
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}
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return ret;
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}
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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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char *prefix)
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{
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int ret;
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if (!prefix)
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prefix = "";
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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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char prop[128];
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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 (ret < 0)
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return ret;
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}
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if (!card->name && card->dai_link)
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card->name = card->dai_link->name;
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return 0;
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}
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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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{
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if (dai)
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return clk_prepare_enable(dai->clk);
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return 0;
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}
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static void asoc_simple_clk_disable(struct asoc_simple_dai *dai)
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{
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if (dai)
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clk_disable_unprepare(dai->clk);
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}
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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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{
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struct clk *clk;
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u32 val;
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/*
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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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*/
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clk = devm_get_clk_from_child(dev, node, NULL);
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if (IS_ERR(clk))
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clk = devm_get_clk_from_child(dev, dlc->of_node, NULL);
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if (!IS_ERR(clk)) {
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simple_dai->clk = clk;
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simple_dai->sysclk = clk_get_rate(clk);
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} else if (!of_property_read_u32(node, "system-clock-frequency",
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&val)) {
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simple_dai->sysclk = val;
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}
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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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return 0;
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}
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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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{
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struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
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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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int ret;
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ret = asoc_simple_clk_enable(dai_props->cpu_dai);
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if (ret)
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return ret;
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ret = asoc_simple_clk_enable(dai_props->codec_dai);
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if (ret)
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asoc_simple_clk_disable(dai_props->cpu_dai);
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return ret;
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}
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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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{
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struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
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struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
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struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
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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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}
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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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}
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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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unsigned long rate)
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{
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if (!simple_dai)
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return 0;
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if (!simple_dai->clk)
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return 0;
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if (clk_get_rate(simple_dai->clk) == rate)
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return 0;
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return clk_set_rate(simple_dai->clk, rate);
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}
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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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{
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struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
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struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
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struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
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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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int ret;
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if (dai_props->mclk_fs)
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mclk_fs = dai_props->mclk_fs;
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if (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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if (ret < 0)
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return ret;
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ret = asoc_simple_set_clk_rate(dai_props->cpu_dai, mclk);
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if (ret < 0)
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return ret;
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ret = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
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SND_SOC_CLOCK_IN);
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if (ret && ret != -ENOTSUPP)
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goto err;
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ret = snd_soc_dai_set_sysclk(cpu_dai, 0, mclk,
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SND_SOC_CLOCK_OUT);
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if (ret && ret != -ENOTSUPP)
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goto err;
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}
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return 0;
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err:
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return ret;
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}
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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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{
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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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return 0;
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}
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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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{
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int ret;
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if (!simple_dai)
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return 0;
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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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return ret;
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}
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}
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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->slots,
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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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return ret;
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}
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}
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return 0;
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}
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static int asoc_simple_init_dai_link_params(struct snd_soc_pcm_runtime *rtd,
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struct simple_dai_props *dai_props)
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{
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struct snd_soc_dai_link *dai_link = rtd->dai_link;
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struct snd_soc_component *component;
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struct snd_soc_pcm_stream *params;
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struct snd_pcm_hardware hw;
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int i, ret, stream;
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/* Only codecs should have non_legacy_dai_naming set. */
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for_each_rtd_components(rtd, i, component) {
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if (!component->driver->non_legacy_dai_naming)
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return 0;
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}
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/* Assumes the capabilities are the same for all supported streams */
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for_each_pcm_streams(stream) {
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ret = snd_soc_runtime_calc_hw(rtd, &hw, stream);
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if (ret == 0)
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break;
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}
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if (ret < 0) {
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dev_err(rtd->dev, "simple-card: no valid dai_link params\n");
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return ret;
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}
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params = devm_kzalloc(rtd->dev, sizeof(*params), GFP_KERNEL);
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if (!params)
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return -ENOMEM;
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params->formats = hw.formats;
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params->rates = hw.rates;
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params->rate_min = hw.rate_min;
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params->rate_max = hw.rate_max;
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params->channels_min = hw.channels_min;
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params->channels_max = hw.channels_max;
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dai_link->params = params;
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dai_link->num_params = 1;
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return 0;
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}
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int asoc_simple_dai_init(struct snd_soc_pcm_runtime *rtd)
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{
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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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int ret;
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ret = asoc_simple_init_dai(asoc_rtd_to_codec(rtd, 0),
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dai_props->codec_dai);
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if (ret < 0)
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return ret;
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ret = asoc_simple_init_dai(asoc_rtd_to_cpu(rtd, 0),
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dai_props->cpu_dai);
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if (ret < 0)
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return ret;
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ret = asoc_simple_init_dai_link_params(rtd, dai_props);
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if (ret < 0)
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return ret;
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return 0;
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}
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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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{
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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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/*
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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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*/
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if (!dai_link->platforms->of_node)
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dai_link->num_platforms = 0;
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}
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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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int is_single_links)
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{
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/*
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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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* was 0. See:
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* fmt_single_name()
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* fmt_multiple_name()
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*/
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if (is_single_links)
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dai_link->cpus->dai_name = NULL;
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}
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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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{
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struct snd_soc_dai_link *dai_link;
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int i;
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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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}
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return 0;
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}
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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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char *prefix)
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{
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struct device_node *node = card->dev->of_node;
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char prop[128];
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if (!prefix)
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prefix = "";
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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 0;
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return snd_soc_of_parse_audio_routing(card, prop);
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}
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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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char *prefix)
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{
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struct device_node *node = card->dev->of_node;
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char prop[128];
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if (!prefix)
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prefix = "";
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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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return 0;
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}
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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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char *prefix)
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{
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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;
|
|
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_codec_conf *cconf = NULL;
|
|
int i;
|
|
|
|
dai_props = devm_kcalloc(dev, li->link, sizeof(*dai_props), GFP_KERNEL);
|
|
dai_link = devm_kcalloc(dev, li->link, sizeof(*dai_link), GFP_KERNEL);
|
|
dais = devm_kcalloc(dev, li->dais, sizeof(*dais), GFP_KERNEL);
|
|
if (!dai_props || !dai_link || !dais)
|
|
return -ENOMEM;
|
|
|
|
if (li->conf) {
|
|
cconf = devm_kcalloc(dev, li->conf, sizeof(*cconf), GFP_KERNEL);
|
|
if (!cconf)
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/*
|
|
* Use snd_soc_dai_link_component instead of legacy style
|
|
* It is codec only. but cpu/platform will be supported in the future.
|
|
* see
|
|
* soc-core.c :: snd_soc_init_multicodec()
|
|
*
|
|
* "platform" might be removed
|
|
* see
|
|
* simple-card-utils.c :: asoc_simple_canonicalize_platform()
|
|
*/
|
|
for (i = 0; i < li->link; i++) {
|
|
dai_link[i].cpus = &dai_props[i].cpus;
|
|
dai_link[i].num_cpus = 1;
|
|
dai_link[i].codecs = &dai_props[i].codecs;
|
|
dai_link[i].num_codecs = 1;
|
|
dai_link[i].platforms = &dai_props[i].platforms;
|
|
dai_link[i].num_platforms = 1;
|
|
}
|
|
|
|
priv->dai_props = dai_props;
|
|
priv->dai_link = dai_link;
|
|
priv->dais = dais;
|
|
priv->codec_conf = cconf;
|
|
|
|
card->dai_link = priv->dai_link;
|
|
card->num_links = li->link;
|
|
card->codec_conf = cconf;
|
|
card->num_configs = li->conf;
|
|
|
|
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");
|