413 lines
10 KiB
C
413 lines
10 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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//
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// ASoC audio graph SCU sound card support
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//
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// Copyright (C) 2017 Renesas Solutions Corp.
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// Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
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//
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// based on
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// ${LINUX}/sound/soc/generic/simple-scu-card.c
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// ${LINUX}/sound/soc/generic/audio-graph-card.c
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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/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 snd_soc_codec_conf codec_conf;
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struct asoc_simple_dai *dai_props;
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struct snd_soc_dai_link *dai_link;
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struct asoc_simple_card_data adata;
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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 asoc_simple_dai *dai_props = graph_priv_to_props(priv, rtd->num);
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return asoc_simple_card_clk_enable(dai_props);
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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 asoc_simple_dai *dai_props = graph_priv_to_props(priv, rtd->num);
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asoc_simple_card_clk_disable(dai_props);
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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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};
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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 *dai;
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struct snd_soc_dai_link *dai_link;
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struct asoc_simple_dai *dai_props;
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int num = rtd->num;
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dai_link = graph_priv_to_link(priv, num);
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dai_props = graph_priv_to_props(priv, num);
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dai = dai_link->dynamic ?
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rtd->cpu_dai :
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rtd->codec_dai;
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return asoc_simple_card_init_dai(dai, dai_props);
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}
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static int asoc_graph_card_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 graph_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
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asoc_simple_card_convert_fixup(&priv->adata, params);
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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 *ep,
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struct graph_card_data *priv,
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unsigned int daifmt,
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int idx, int is_fe)
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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 asoc_simple_dai *dai_props = graph_priv_to_props(priv, idx);
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struct snd_soc_card *card = graph_priv_to_card(priv);
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int ret;
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if (is_fe) {
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/* BE is dummy */
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dai_link->codec_of_node = NULL;
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dai_link->codec_dai_name = "snd-soc-dummy-dai";
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dai_link->codec_name = "snd-soc-dummy";
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/* FE settings */
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dai_link->dynamic = 1;
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dai_link->dpcm_merged_format = 1;
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ret = asoc_simple_card_parse_graph_cpu(ep, dai_link);
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if (ret)
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return ret;
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ret = asoc_simple_card_parse_clk_cpu(dev, ep, dai_link, dai_props);
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if (ret < 0)
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return ret;
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ret = asoc_simple_card_set_dailink_name(dev, dai_link,
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"fe.%s",
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dai_link->cpu_dai_name);
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if (ret < 0)
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return ret;
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/* card->num_links includes Codec */
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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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} else {
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/* FE is dummy */
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dai_link->cpu_of_node = NULL;
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dai_link->cpu_dai_name = "snd-soc-dummy-dai";
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dai_link->cpu_name = "snd-soc-dummy";
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/* BE settings */
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dai_link->no_pcm = 1;
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dai_link->be_hw_params_fixup = asoc_graph_card_be_hw_params_fixup;
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ret = asoc_simple_card_parse_graph_codec(ep, dai_link);
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if (ret < 0)
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return ret;
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ret = asoc_simple_card_parse_clk_codec(dev, ep, dai_link, dai_props);
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if (ret < 0)
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return ret;
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ret = asoc_simple_card_set_dailink_name(dev, dai_link,
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"be.%s",
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dai_link->codec_dai_name);
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if (ret < 0)
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return ret;
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snd_soc_of_parse_audio_prefix(card,
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&priv->codec_conf,
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dai_link->codec_of_node,
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"prefix");
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}
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ret = asoc_simple_card_of_parse_tdm(ep, dai_props);
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if (ret)
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return ret;
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ret = asoc_simple_card_canonicalize_dailink(dai_link);
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if (ret < 0)
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return ret;
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dai_link->dai_fmt = daifmt;
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dai_link->dpcm_playback = 1;
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dai_link->dpcm_capture = 1;
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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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return 0;
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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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struct device_node *cpu_port;
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struct device_node *cpu_ep;
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struct device_node *codec_ep;
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struct device_node *rcpu_ep;
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struct device_node *codec_port;
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struct device_node *codec_port_old;
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unsigned int daifmt = 0;
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int dai_idx, ret;
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int rc, codec;
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if (!node)
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return -EINVAL;
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/*
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* we need to consider "widgets", "mclk-fs" around here
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* see simple-card
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*/
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ret = asoc_simple_card_of_parse_routing(card, NULL, 0);
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if (ret < 0)
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return ret;
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asoc_simple_card_parse_convert(dev, NULL, &priv->adata);
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/*
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* it supports multi CPU, single CODEC only here
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* see asoc_graph_get_dais_count
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*/
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/* find 1st codec */
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of_for_each_phandle(&it, rc, node, "dais", NULL, 0) {
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cpu_port = it.node;
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cpu_ep = of_get_next_child(cpu_port, NULL);
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codec_ep = of_graph_get_remote_endpoint(cpu_ep);
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rcpu_ep = of_graph_get_remote_endpoint(codec_ep);
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of_node_put(cpu_ep);
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of_node_put(codec_ep);
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of_node_put(rcpu_ep);
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if (!codec_ep)
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continue;
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if (rcpu_ep != cpu_ep) {
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dev_err(dev, "remote-endpoint missmatch (%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 parse_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, &daifmt);
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if (ret < 0) {
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of_node_put(cpu_port);
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goto parse_of_err;
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}
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}
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dai_idx = 0;
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codec_port_old = NULL;
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for (codec = 0; codec < 2; codec++) {
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/*
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* To listup valid sounds continuously,
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* detect all CPU-dummy first, and
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* detect all dummy-Codec second
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*/
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of_for_each_phandle(&it, rc, node, "dais", NULL, 0) {
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cpu_port = it.node;
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cpu_ep = of_get_next_child(cpu_port, NULL);
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codec_ep = of_graph_get_remote_endpoint(cpu_ep);
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codec_port = of_graph_get_port_parent(codec_ep);
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of_node_put(cpu_ep);
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of_node_put(codec_ep);
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of_node_put(codec_port);
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if (codec) {
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if (!codec_port)
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continue;
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if (codec_port_old == codec_port)
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continue;
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codec_port_old = codec_port;
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/* Back-End (= Codec) */
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ret = asoc_graph_card_dai_link_of(codec_ep, priv, daifmt, dai_idx++, 0);
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if (ret < 0) {
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of_node_put(cpu_port);
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goto parse_of_err;
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}
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} else {
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/* Front-End (= CPU) */
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ret = asoc_graph_card_dai_link_of(cpu_ep, priv, daifmt, dai_idx++, 1);
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if (ret < 0) {
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of_node_put(cpu_port);
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goto parse_of_err;
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}
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}
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}
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}
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ret = asoc_simple_card_parse_card_name(card, NULL);
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if (ret)
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goto parse_of_err;
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ret = 0;
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parse_of_err:
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return ret;
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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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struct device_node *cpu_port;
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struct device_node *cpu_ep;
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struct device_node *codec_ep;
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struct device_node *codec_port;
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struct device_node *codec_port_old;
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int count = 0;
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int rc;
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codec_port_old = NULL;
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of_for_each_phandle(&it, rc, node, "dais", NULL, 0) {
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cpu_port = it.node;
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cpu_ep = of_get_next_child(cpu_port, NULL);
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codec_ep = of_graph_get_remote_endpoint(cpu_ep);
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codec_port = of_graph_get_port_parent(codec_ep);
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of_node_put(cpu_ep);
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of_node_put(codec_ep);
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of_node_put(codec_port);
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if (cpu_ep)
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count++;
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if (!codec_port)
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continue;
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if (codec_port_old == codec_port)
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continue;
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count++;
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codec_port_old = codec_port;
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}
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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 asoc_simple_dai *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_kcalloc(dev, num, sizeof(*dai_props), GFP_KERNEL);
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dai_link = devm_kcalloc(dev, num, sizeof(*dai_link), GFP_KERNEL);
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if (!dai_props || !dai_link)
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return -ENOMEM;
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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 = priv->dai_link;
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card->num_links = num;
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card->codec_conf = &priv->codec_conf;
|
||
|
|
card->num_configs = 1;
|
||
|
|
|
||
|
|
ret = asoc_graph_card_parse_of(priv);
|
||
|
|
if (ret < 0) {
|
||
|
|
if (ret != -EPROBE_DEFER)
|
||
|
|
dev_err(dev, "parse error %d\n", ret);
|
||
|
|
goto err;
|
||
|
|
}
|
||
|
|
|
||
|
|
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_graph_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_graph_of_match[] = {
|
||
|
|
{ .compatible = "audio-graph-scu-card", },
|
||
|
|
{},
|
||
|
|
};
|
||
|
|
MODULE_DEVICE_TABLE(of, asoc_graph_of_match);
|
||
|
|
|
||
|
|
static struct platform_driver asoc_graph_card = {
|
||
|
|
.driver = {
|
||
|
|
.name = "asoc-audio-graph-scu-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-scu-card");
|
||
|
|
MODULE_LICENSE("GPL v2");
|
||
|
|
MODULE_DESCRIPTION("ASoC Audio Graph SCU Sound Card");
|
||
|
|
MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
|