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@@ -0,0 +1,416 @@
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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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+ *
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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/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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+
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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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+ u32 convert_rate;
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+ u32 convert_channels;
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+};
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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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+
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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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+
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+ return clk_prepare_enable(dai_props->clk);
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+}
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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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+
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+ clk_disable_unprepare(dai_props->clk);
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+}
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+
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+static 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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+
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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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+
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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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+
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+ return asoc_simple_card_init_dai(dai, dai_props);
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+}
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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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+ 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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+
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+ if (priv->convert_rate)
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+ rate->min =
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+ rate->max = priv->convert_rate;
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+
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+ if (priv->convert_channels)
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+ channels->min =
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+ channels->max = priv->convert_channels;
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+
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+ return 0;
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+}
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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+ /* card->num_links includes Codec */
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+ asoc_simple_card_canonicalize_cpu(dai_link,
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+ (card->num_links - 1) == 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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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+ ret = snd_soc_of_parse_tdm_slot(ep,
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+ &dai_props->tx_slot_mask,
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+ &dai_props->rx_slot_mask,
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+ &dai_props->slots,
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+ &dai_props->slot_width);
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+ if (ret)
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+ return ret;
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+
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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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+
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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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+
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+ dev_dbg(dev, "\t%s / %04x / %d\n",
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+ dai_link->name,
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+ dai_link->dai_fmt,
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+ dai_props->sysclk);
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+
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+ return 0;
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+}
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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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+ unsigned int daifmt = 0;
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+ int dai_idx, ret;
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+ int rc, codec;
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+
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+ if (!node)
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+ return -EINVAL;
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+
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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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+
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+ ret = snd_soc_of_parse_audio_routing(card, "routing");
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+ if (ret)
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+ return ret;
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+
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+ /* sampling rate convert */
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+ of_property_read_u32(node, "convert-rate", &priv->convert_rate);
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+
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+ /* channels transfer */
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+ of_property_read_u32(node, "convert-channels", &priv->convert_channels);
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+
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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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+
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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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+
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+ of_node_put(cpu_port);
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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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+
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+ if (!codec_ep)
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+ continue;
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+
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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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+
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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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+ goto parse_of_err;
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+ }
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+
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+ dai_idx = 0;
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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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+
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+ of_node_put(cpu_port);
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+ of_node_put(cpu_ep);
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+ of_node_put(codec_ep);
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+
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+ if (codec) {
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+ if (!codec_ep)
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+ continue;
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+
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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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+ goto parse_of_err;
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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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+ 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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+
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+ dev_dbg(dev, "New card: %s\n",
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+ card->name ? card->name : "");
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+ dev_dbg(dev, "convert_rate %d\n", priv->convert_rate);
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+ dev_dbg(dev, "convert_channels %d\n", priv->convert_channels);
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+
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+ ret = 0;
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+
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+parse_of_err:
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+ return ret;
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+}
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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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+ int count = 0;
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+ int rc;
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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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+
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+ of_node_put(cpu_port);
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+ of_node_put(cpu_ep);
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+ of_node_put(codec_ep);
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+
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+ if (cpu_ep)
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+ count++;
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+ if (codec_ep)
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+ count++;
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+ }
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+
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+ return count;
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+}
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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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+
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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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+
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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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+
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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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+
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+ priv->dai_props = dai_props;
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+ priv->dai_link = dai_link;
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+
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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;
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+ card->num_configs = 1;
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+
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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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+
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+ snd_soc_card_set_drvdata(card, priv);
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+
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+ ret = devm_snd_soc_register_card(dev, card);
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+ if (ret >= 0)
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+ return ret;
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+err:
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+ asoc_simple_card_clean_reference(card);
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+
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+ return ret;
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+}
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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-scu-card", },
|
|
|
+ {},
|
|
|
+};
|
|
|
+MODULE_DEVICE_TABLE(of, asoc_graph_of_match);
|
|
|
+
|
|
|
+static struct platform_driver asoc_graph_card = {
|
|
|
+ .driver = {
|
|
|
+ .name = "asoc-audio-graph-scu-card",
|
|
|
+ .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>");
|