371 lines
9.8 KiB
C
371 lines
9.8 KiB
C
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/*
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* ASoC audio graph sound card support
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*
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* Copyright (C) 2016 Renesas Solutions Corp.
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* Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
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*
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* based on ${LINUX}/sound/soc/generic/simple-card.c
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/clk.h>
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#include <linux/device.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_device.h>
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#include <linux/of_gpio.h>
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#include <linux/of_graph.h>
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#include <linux/platform_device.h>
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#include <linux/string.h>
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#include <sound/jack.h>
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#include <sound/simple_card_utils.h>
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struct graph_card_data {
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struct snd_soc_card snd_card;
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struct graph_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 snd_soc_dai_link *dai_link;
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struct gpio_desc *pa_gpio;
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};
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static int asoc_graph_card_outdrv_event(struct snd_soc_dapm_widget *w,
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struct snd_kcontrol *kcontrol,
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int event)
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{
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struct snd_soc_dapm_context *dapm = w->dapm;
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struct graph_card_data *priv = snd_soc_card_get_drvdata(dapm->card);
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switch (event) {
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case SND_SOC_DAPM_POST_PMU:
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gpiod_set_value_cansleep(priv->pa_gpio, 1);
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break;
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case SND_SOC_DAPM_PRE_PMD:
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gpiod_set_value_cansleep(priv->pa_gpio, 0);
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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static const struct snd_soc_dapm_widget asoc_graph_card_dapm_widgets[] = {
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SND_SOC_DAPM_OUT_DRV_E("Amplifier", SND_SOC_NOPM,
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0, 0, NULL, 0, asoc_graph_card_outdrv_event,
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SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
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};
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#define graph_priv_to_card(priv) (&(priv)->snd_card)
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#define graph_priv_to_props(priv, i) ((priv)->dai_props + (i))
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#define graph_priv_to_dev(priv) (graph_priv_to_card(priv)->dev)
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#define graph_priv_to_link(priv, i) (graph_priv_to_card(priv)->dai_link + (i))
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static int asoc_graph_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 graph_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
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struct graph_dai_props *dai_props = graph_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_graph_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 graph_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
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struct graph_dai_props *dai_props = graph_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_graph_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 graph_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
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struct graph_dai_props *dai_props = graph_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 = 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_graph_card_ops = {
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.startup = asoc_graph_card_startup,
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.shutdown = asoc_graph_card_shutdown,
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.hw_params = asoc_graph_card_hw_params,
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};
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static int asoc_graph_card_dai_init(struct snd_soc_pcm_runtime *rtd)
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{
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struct graph_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 graph_dai_props *dai_props =
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graph_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_graph_card_dai_link_of(struct device_node *cpu_port,
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struct graph_card_data *priv,
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int idx)
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{
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struct device *dev = graph_priv_to_dev(priv);
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struct snd_soc_dai_link *dai_link = graph_priv_to_link(priv, idx);
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struct graph_dai_props *dai_props = graph_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_ep = of_get_next_child(cpu_port, NULL);
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struct device_node *codec_ep = of_graph_get_remote_endpoint(cpu_ep);
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struct device_node *rcpu_ep = of_graph_get_remote_endpoint(codec_ep);
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int ret;
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if (rcpu_ep != cpu_ep) {
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dev_err(dev, "remote-endpoint mismatch (%s/%s/%s)\n",
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cpu_ep->name, codec_ep->name, rcpu_ep->name);
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ret = -EINVAL;
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goto dai_link_of_err;
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}
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ret = asoc_simple_card_parse_daifmt(dev, cpu_ep, codec_ep,
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NULL, &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(rcpu_ep, "mclk-fs", &dai_props->mclk_fs);
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ret = asoc_simple_card_parse_graph_cpu(cpu_ep, 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_parse_graph_codec(codec_ep, 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_of_parse_tdm(cpu_ep, 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_ep, 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_ep, 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_ep, 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_graph_card_ops;
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dai_link->init = asoc_graph_card_dai_init;
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asoc_simple_card_canonicalize_cpu(dai_link,
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of_graph_get_endpoint_count(dai_link->cpu_of_node) == 1);
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dai_link_of_err:
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of_node_put(cpu_ep);
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of_node_put(rcpu_ep);
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of_node_put(codec_ep);
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return ret;
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}
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static int asoc_graph_card_parse_of(struct graph_card_data *priv)
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{
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struct of_phandle_iterator it;
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struct device *dev = graph_priv_to_dev(priv);
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struct snd_soc_card *card = graph_priv_to_card(priv);
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struct device_node *node = dev->of_node;
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int rc, idx = 0;
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int ret;
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ret = asoc_simple_card_of_parse_widgets(card, NULL);
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if (ret < 0)
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return ret;
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ret = asoc_simple_card_of_parse_routing(card, NULL, 1);
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if (ret < 0)
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return ret;
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/* Factor to mclk, used in hw_params() */
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of_property_read_u32(node, "mclk-fs", &priv->mclk_fs);
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of_for_each_phandle(&it, rc, node, "dais", NULL, 0) {
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ret = asoc_graph_card_dai_link_of(it.node, priv, idx++);
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if (ret < 0) {
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of_node_put(it.node);
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return ret;
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}
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}
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return asoc_simple_card_parse_card_name(card, NULL);
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}
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static int asoc_graph_get_dais_count(struct device *dev)
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{
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struct of_phandle_iterator it;
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struct device_node *node = dev->of_node;
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int count = 0;
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int rc;
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of_for_each_phandle(&it, rc, node, "dais", NULL, 0)
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count++;
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return count;
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}
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static int asoc_graph_card_probe(struct platform_device *pdev)
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{
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struct graph_card_data *priv;
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struct snd_soc_dai_link *dai_link;
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struct graph_dai_props *dai_props;
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struct device *dev = &pdev->dev;
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struct snd_soc_card *card;
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int num, ret;
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/* Allocate the private data and the DAI link array */
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priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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num = asoc_graph_get_dais_count(dev);
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if (num == 0)
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return -EINVAL;
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dai_props = devm_kzalloc(dev, sizeof(*dai_props) * num, GFP_KERNEL);
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dai_link = devm_kzalloc(dev, sizeof(*dai_link) * num, GFP_KERNEL);
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if (!dai_props || !dai_link)
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return -ENOMEM;
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priv->pa_gpio = devm_gpiod_get_optional(dev, "pa", GPIOD_OUT_LOW);
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if (IS_ERR(priv->pa_gpio)) {
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ret = PTR_ERR(priv->pa_gpio);
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dev_err(dev, "failed to get amplifier gpio: %d\n", ret);
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return ret;
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}
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priv->dai_props = dai_props;
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priv->dai_link = dai_link;
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/* Init snd_soc_card */
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card = graph_priv_to_card(priv);
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card->owner = THIS_MODULE;
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card->dev = dev;
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card->dai_link = dai_link;
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card->num_links = num;
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card->dapm_widgets = asoc_graph_card_dapm_widgets;
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card->num_dapm_widgets = ARRAY_SIZE(asoc_graph_card_dapm_widgets);
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ret = asoc_graph_card_parse_of(priv);
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if (ret < 0) {
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if (ret != -EPROBE_DEFER)
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dev_err(dev, "parse error %d\n", ret);
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goto err;
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}
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snd_soc_card_set_drvdata(card, priv);
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ret = devm_snd_soc_register_card(dev, card);
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if (ret < 0)
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goto err;
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return 0;
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err:
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asoc_simple_card_clean_reference(card);
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return ret;
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}
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static int asoc_graph_card_remove(struct platform_device *pdev)
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{
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struct snd_soc_card *card = platform_get_drvdata(pdev);
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|
return asoc_simple_card_clean_reference(card);
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct of_device_id asoc_graph_of_match[] = {
|
||
|
|
{ .compatible = "audio-graph-card", },
|
||
|
|
{},
|
||
|
|
};
|
||
|
|
MODULE_DEVICE_TABLE(of, asoc_graph_of_match);
|
||
|
|
|
||
|
|
static struct platform_driver asoc_graph_card = {
|
||
|
|
.driver = {
|
||
|
|
.name = "asoc-audio-graph-card",
|
||
|
|
.pm = &snd_soc_pm_ops,
|
||
|
|
.of_match_table = asoc_graph_of_match,
|
||
|
|
},
|
||
|
|
.probe = asoc_graph_card_probe,
|
||
|
|
.remove = asoc_graph_card_remove,
|
||
|
|
};
|
||
|
|
module_platform_driver(asoc_graph_card);
|
||
|
|
|
||
|
|
MODULE_ALIAS("platform:asoc-audio-graph-card");
|
||
|
|
MODULE_LICENSE("GPL v2");
|
||
|
|
MODULE_DESCRIPTION("ASoC Audio Graph Sound Card");
|
||
|
|
MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
|