479 lines
12 KiB
C
479 lines
12 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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//
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// ASoC simple sound card support
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//
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// Copyright (C) 2012 Renesas Solutions Corp.
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// Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
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#include <linux/clk.h>
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#include <linux/device.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <linux/string.h>
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#include <sound/simple_card.h>
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#include <sound/soc-dai.h>
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#include <sound/soc.h>
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struct simple_card_data {
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struct snd_soc_card snd_card;
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struct simple_dai_props {
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struct asoc_simple_dai cpu_dai;
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struct asoc_simple_dai codec_dai;
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unsigned int mclk_fs;
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} *dai_props;
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unsigned int mclk_fs;
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struct asoc_simple_jack hp_jack;
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struct asoc_simple_jack mic_jack;
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struct snd_soc_dai_link *dai_link;
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};
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#define simple_priv_to_card(priv) (&(priv)->snd_card)
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#define simple_priv_to_props(priv, i) ((priv)->dai_props + (i))
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#define simple_priv_to_dev(priv) (simple_priv_to_card(priv)->dev)
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#define simple_priv_to_link(priv, i) (simple_priv_to_card(priv)->dai_link + (i))
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#define DAI "sound-dai"
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#define CELL "#sound-dai-cells"
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#define PREFIX "simple-audio-card,"
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static int asoc_simple_card_startup(struct snd_pcm_substream *substream)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct simple_card_data *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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int ret;
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ret = asoc_simple_card_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_card_clk_enable(&dai_props->codec_dai);
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if (ret)
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asoc_simple_card_clk_disable(&dai_props->cpu_dai);
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return ret;
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}
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static void asoc_simple_card_shutdown(struct snd_pcm_substream *substream)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct simple_card_data *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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asoc_simple_card_clk_disable(&dai_props->cpu_dai);
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asoc_simple_card_clk_disable(&dai_props->codec_dai);
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}
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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->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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static int asoc_simple_card_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 = 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 simple_card_data *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 = 0;
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if (priv->mclk_fs)
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mclk_fs = priv->mclk_fs;
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else 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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static const struct snd_soc_ops asoc_simple_card_ops = {
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.startup = asoc_simple_card_startup,
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.shutdown = asoc_simple_card_shutdown,
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.hw_params = asoc_simple_card_hw_params,
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};
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static int asoc_simple_card_dai_init(struct snd_soc_pcm_runtime *rtd)
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{
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struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
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struct snd_soc_dai *codec = rtd->codec_dai;
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struct snd_soc_dai *cpu = rtd->cpu_dai;
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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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int ret;
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ret = asoc_simple_card_init_dai(codec, &dai_props->codec_dai);
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if (ret < 0)
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return ret;
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ret = asoc_simple_card_init_dai(cpu, &dai_props->cpu_dai);
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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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static int asoc_simple_card_dai_link_of(struct device_node *node,
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struct simple_card_data *priv,
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int idx,
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bool is_top_level_node)
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{
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struct device *dev = simple_priv_to_dev(priv);
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struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, idx);
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struct simple_dai_props *dai_props = simple_priv_to_props(priv, idx);
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struct asoc_simple_dai *cpu_dai = &dai_props->cpu_dai;
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struct asoc_simple_dai *codec_dai = &dai_props->codec_dai;
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struct device_node *cpu = NULL;
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struct device_node *plat = NULL;
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struct device_node *codec = NULL;
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char prop[128];
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char *prefix = "";
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int ret, single_cpu;
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/* For single DAI link & old style of DT node */
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if (is_top_level_node)
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prefix = PREFIX;
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snprintf(prop, sizeof(prop), "%scpu", prefix);
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cpu = of_get_child_by_name(node, prop);
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if (!cpu) {
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ret = -EINVAL;
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dev_err(dev, "%s: Can't find %s DT node\n", __func__, prop);
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goto dai_link_of_err;
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}
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snprintf(prop, sizeof(prop), "%splat", prefix);
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plat = of_get_child_by_name(node, prop);
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snprintf(prop, sizeof(prop), "%scodec", prefix);
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codec = of_get_child_by_name(node, prop);
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if (!codec) {
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ret = -EINVAL;
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dev_err(dev, "%s: Can't find %s DT node\n", __func__, prop);
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goto dai_link_of_err;
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}
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ret = asoc_simple_card_parse_daifmt(dev, node, codec,
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prefix, &dai_link->dai_fmt);
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if (ret < 0)
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goto dai_link_of_err;
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of_property_read_u32(node, "mclk-fs", &dai_props->mclk_fs);
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ret = asoc_simple_card_parse_cpu(cpu, dai_link,
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DAI, CELL, &single_cpu);
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if (ret < 0)
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goto dai_link_of_err;
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ret = asoc_simple_card_parse_codec(codec, dai_link, DAI, CELL);
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if (ret < 0)
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goto dai_link_of_err;
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ret = asoc_simple_card_parse_platform(plat, dai_link, DAI, CELL);
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if (ret < 0)
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goto dai_link_of_err;
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ret = asoc_simple_card_of_parse_tdm(cpu, cpu_dai);
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if (ret < 0)
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goto dai_link_of_err;
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ret = asoc_simple_card_of_parse_tdm(codec, codec_dai);
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if (ret < 0)
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goto dai_link_of_err;
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ret = asoc_simple_card_parse_clk_cpu(dev, cpu, dai_link, cpu_dai);
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if (ret < 0)
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goto dai_link_of_err;
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ret = asoc_simple_card_parse_clk_codec(dev, codec, dai_link, codec_dai);
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if (ret < 0)
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goto dai_link_of_err;
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ret = asoc_simple_card_canonicalize_dailink(dai_link);
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if (ret < 0)
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goto dai_link_of_err;
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ret = asoc_simple_card_set_dailink_name(dev, dai_link,
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"%s-%s",
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dai_link->cpu_dai_name,
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dai_link->codec_dai_name);
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if (ret < 0)
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goto dai_link_of_err;
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dai_link->ops = &asoc_simple_card_ops;
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dai_link->init = asoc_simple_card_dai_init;
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asoc_simple_card_canonicalize_cpu(dai_link, single_cpu);
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dai_link_of_err:
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of_node_put(cpu);
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of_node_put(codec);
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return ret;
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}
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static int asoc_simple_card_parse_aux_devs(struct device_node *node,
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struct simple_card_data *priv)
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{
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struct device *dev = simple_priv_to_dev(priv);
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struct device_node *aux_node;
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struct snd_soc_card *card = simple_priv_to_card(priv);
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int i, n, len;
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if (!of_find_property(node, PREFIX "aux-devs", &len))
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return 0; /* Ok to have no aux-devs */
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n = len / sizeof(__be32);
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if (n <= 0)
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return -EINVAL;
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card->aux_dev = devm_kcalloc(dev,
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n, sizeof(*card->aux_dev), GFP_KERNEL);
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if (!card->aux_dev)
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return -ENOMEM;
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for (i = 0; i < n; i++) {
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aux_node = of_parse_phandle(node, PREFIX "aux-devs", i);
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if (!aux_node)
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return -EINVAL;
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card->aux_dev[i].codec_of_node = aux_node;
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}
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card->num_aux_devs = n;
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return 0;
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}
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static int asoc_simple_card_parse_of(struct simple_card_data *priv)
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{
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struct device *dev = simple_priv_to_dev(priv);
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struct snd_soc_card *card = simple_priv_to_card(priv);
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struct device_node *dai_link;
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struct device_node *node = dev->of_node;
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int ret;
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if (!node)
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return -EINVAL;
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dai_link = of_get_child_by_name(node, PREFIX "dai-link");
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ret = asoc_simple_card_of_parse_widgets(card, PREFIX);
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if (ret < 0)
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goto card_parse_end;
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ret = asoc_simple_card_of_parse_routing(card, PREFIX, 1);
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if (ret < 0)
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goto card_parse_end;
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/* Factor to mclk, used in hw_params() */
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of_property_read_u32(node, PREFIX "mclk-fs", &priv->mclk_fs);
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/* Single/Muti DAI link(s) & New style of DT node */
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if (dai_link) {
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struct device_node *np = NULL;
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int i = 0;
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for_each_child_of_node(node, np) {
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dev_dbg(dev, "\tlink %d:\n", i);
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ret = asoc_simple_card_dai_link_of(np, priv,
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i, false);
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if (ret < 0) {
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of_node_put(np);
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goto card_parse_end;
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}
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i++;
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}
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} else {
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/* For single DAI link & old style of DT node */
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ret = asoc_simple_card_dai_link_of(node, priv, 0, true);
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if (ret < 0)
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goto card_parse_end;
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}
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ret = asoc_simple_card_parse_card_name(card, PREFIX);
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if (ret < 0)
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goto card_parse_end;
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ret = asoc_simple_card_parse_aux_devs(node, priv);
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card_parse_end:
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of_node_put(dai_link);
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return ret;
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}
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static int asoc_simple_soc_card_probe(struct snd_soc_card *card)
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{
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struct simple_card_data *priv = snd_soc_card_get_drvdata(card);
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int ret;
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ret = asoc_simple_card_init_hp(card, &priv->hp_jack, PREFIX);
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if (ret < 0)
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return ret;
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ret = asoc_simple_card_init_mic(card, &priv->mic_jack, PREFIX);
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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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|
|
static int asoc_simple_card_probe(struct platform_device *pdev)
|
||
|
|
{
|
||
|
|
struct simple_card_data *priv;
|
||
|
|
struct snd_soc_dai_link *dai_link;
|
||
|
|
struct simple_dai_props *dai_props;
|
||
|
|
struct device *dev = &pdev->dev;
|
||
|
|
struct device_node *np = dev->of_node;
|
||
|
|
struct snd_soc_card *card;
|
||
|
|
int num, ret;
|
||
|
|
|
||
|
|
/* Get the number of DAI links */
|
||
|
|
if (np && of_get_child_by_name(np, PREFIX "dai-link"))
|
||
|
|
num = of_get_child_count(np);
|
||
|
|
else
|
||
|
|
num = 1;
|
||
|
|
|
||
|
|
/* Allocate the private data and the DAI link array */
|
||
|
|
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
|
||
|
|
if (!priv)
|
||
|
|
return -ENOMEM;
|
||
|
|
|
||
|
|
dai_props = devm_kcalloc(dev, num, sizeof(*dai_props), GFP_KERNEL);
|
||
|
|
dai_link = devm_kcalloc(dev, num, sizeof(*dai_link), GFP_KERNEL);
|
||
|
|
if (!dai_props || !dai_link)
|
||
|
|
return -ENOMEM;
|
||
|
|
|
||
|
|
priv->dai_props = dai_props;
|
||
|
|
priv->dai_link = dai_link;
|
||
|
|
|
||
|
|
/* Init snd_soc_card */
|
||
|
|
card = simple_priv_to_card(priv);
|
||
|
|
card->owner = THIS_MODULE;
|
||
|
|
card->dev = dev;
|
||
|
|
card->dai_link = priv->dai_link;
|
||
|
|
card->num_links = num;
|
||
|
|
card->probe = asoc_simple_soc_card_probe;
|
||
|
|
|
||
|
|
if (np && of_device_is_available(np)) {
|
||
|
|
|
||
|
|
ret = asoc_simple_card_parse_of(priv);
|
||
|
|
if (ret < 0) {
|
||
|
|
if (ret != -EPROBE_DEFER)
|
||
|
|
dev_err(dev, "parse error %d\n", ret);
|
||
|
|
goto err;
|
||
|
|
}
|
||
|
|
|
||
|
|
} else {
|
||
|
|
struct asoc_simple_card_info *cinfo;
|
||
|
|
|
||
|
|
cinfo = dev->platform_data;
|
||
|
|
if (!cinfo) {
|
||
|
|
dev_err(dev, "no info for asoc-simple-card\n");
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!cinfo->name ||
|
||
|
|
!cinfo->codec_dai.name ||
|
||
|
|
!cinfo->codec ||
|
||
|
|
!cinfo->platform ||
|
||
|
|
!cinfo->cpu_dai.name) {
|
||
|
|
dev_err(dev, "insufficient asoc_simple_card_info settings\n");
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
card->name = (cinfo->card) ? cinfo->card : cinfo->name;
|
||
|
|
dai_link->name = cinfo->name;
|
||
|
|
dai_link->stream_name = cinfo->name;
|
||
|
|
dai_link->platform_name = cinfo->platform;
|
||
|
|
dai_link->codec_name = cinfo->codec;
|
||
|
|
dai_link->cpu_dai_name = cinfo->cpu_dai.name;
|
||
|
|
dai_link->codec_dai_name = cinfo->codec_dai.name;
|
||
|
|
dai_link->dai_fmt = cinfo->daifmt;
|
||
|
|
dai_link->init = asoc_simple_card_dai_init;
|
||
|
|
memcpy(&priv->dai_props->cpu_dai, &cinfo->cpu_dai,
|
||
|
|
sizeof(priv->dai_props->cpu_dai));
|
||
|
|
memcpy(&priv->dai_props->codec_dai, &cinfo->codec_dai,
|
||
|
|
sizeof(priv->dai_props->codec_dai));
|
||
|
|
}
|
||
|
|
|
||
|
|
snd_soc_card_set_drvdata(card, priv);
|
||
|
|
|
||
|
|
ret = devm_snd_soc_register_card(dev, card);
|
||
|
|
if (ret < 0)
|
||
|
|
goto err;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
err:
|
||
|
|
asoc_simple_card_clean_reference(card);
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int asoc_simple_card_remove(struct platform_device *pdev)
|
||
|
|
{
|
||
|
|
struct snd_soc_card *card = platform_get_drvdata(pdev);
|
||
|
|
|
||
|
|
return asoc_simple_card_clean_reference(card);
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct of_device_id asoc_simple_of_match[] = {
|
||
|
|
{ .compatible = "simple-audio-card", },
|
||
|
|
{},
|
||
|
|
};
|
||
|
|
MODULE_DEVICE_TABLE(of, asoc_simple_of_match);
|
||
|
|
|
||
|
|
static struct platform_driver asoc_simple_card = {
|
||
|
|
.driver = {
|
||
|
|
.name = "asoc-simple-card",
|
||
|
|
.pm = &snd_soc_pm_ops,
|
||
|
|
.of_match_table = asoc_simple_of_match,
|
||
|
|
},
|
||
|
|
.probe = asoc_simple_card_probe,
|
||
|
|
.remove = asoc_simple_card_remove,
|
||
|
|
};
|
||
|
|
|
||
|
|
module_platform_driver(asoc_simple_card);
|
||
|
|
|
||
|
|
MODULE_ALIAS("platform:asoc-simple-card");
|
||
|
|
MODULE_LICENSE("GPL v2");
|
||
|
|
MODULE_DESCRIPTION("ASoC Simple Sound Card");
|
||
|
|
MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
|