/* * ASoC audio graph SCU sound card support * * Copyright (C) 2017 Renesas Solutions Corp. * Kuninori Morimoto * * based on * ${LINUX}/sound/soc/generic/simple-scu-card.c * ${LINUX}/sound/soc/generic/audio-graph-card.c * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include #include #include #include #include #include #include #include #include #include #include #include struct graph_card_data { struct snd_soc_card snd_card; struct snd_soc_codec_conf codec_conf; struct asoc_simple_dai *dai_props; struct snd_soc_dai_link *dai_link; u32 convert_rate; u32 convert_channels; }; #define graph_priv_to_card(priv) (&(priv)->snd_card) #define graph_priv_to_props(priv, i) ((priv)->dai_props + (i)) #define graph_priv_to_dev(priv) (graph_priv_to_card(priv)->dev) #define graph_priv_to_link(priv, i) (graph_priv_to_card(priv)->dai_link + (i)) static int asoc_graph_card_startup(struct snd_pcm_substream *substream) { struct snd_soc_pcm_runtime *rtd = substream->private_data; struct graph_card_data *priv = snd_soc_card_get_drvdata(rtd->card); struct asoc_simple_dai *dai_props = graph_priv_to_props(priv, rtd->num); return clk_prepare_enable(dai_props->clk); } static void asoc_graph_card_shutdown(struct snd_pcm_substream *substream) { struct snd_soc_pcm_runtime *rtd = substream->private_data; struct graph_card_data *priv = snd_soc_card_get_drvdata(rtd->card); struct asoc_simple_dai *dai_props = graph_priv_to_props(priv, rtd->num); clk_disable_unprepare(dai_props->clk); } static struct snd_soc_ops asoc_graph_card_ops = { .startup = asoc_graph_card_startup, .shutdown = asoc_graph_card_shutdown, }; static int asoc_graph_card_dai_init(struct snd_soc_pcm_runtime *rtd) { struct graph_card_data *priv = snd_soc_card_get_drvdata(rtd->card); struct snd_soc_dai *dai; struct snd_soc_dai_link *dai_link; struct asoc_simple_dai *dai_props; int num = rtd->num; dai_link = graph_priv_to_link(priv, num); dai_props = graph_priv_to_props(priv, num); dai = dai_link->dynamic ? rtd->cpu_dai : rtd->codec_dai; return asoc_simple_card_init_dai(dai, dai_props); } static int asoc_graph_card_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd, struct snd_pcm_hw_params *params) { struct graph_card_data *priv = snd_soc_card_get_drvdata(rtd->card); struct snd_interval *rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); struct snd_interval *channels = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); if (priv->convert_rate) rate->min = rate->max = priv->convert_rate; if (priv->convert_channels) channels->min = channels->max = priv->convert_channels; return 0; } static int asoc_graph_card_dai_link_of(struct device_node *ep, struct graph_card_data *priv, unsigned int daifmt, int idx, int is_fe) { struct device *dev = graph_priv_to_dev(priv); struct snd_soc_dai_link *dai_link = graph_priv_to_link(priv, idx); struct asoc_simple_dai *dai_props = graph_priv_to_props(priv, idx); struct snd_soc_card *card = graph_priv_to_card(priv); int ret; if (is_fe) { /* BE is dummy */ dai_link->codec_of_node = NULL; dai_link->codec_dai_name = "snd-soc-dummy-dai"; dai_link->codec_name = "snd-soc-dummy"; /* FE settings */ dai_link->dynamic = 1; dai_link->dpcm_merged_format = 1; ret = asoc_simple_card_parse_graph_cpu(ep, dai_link); if (ret) return ret; ret = asoc_simple_card_parse_clk_cpu(dev, ep, dai_link, dai_props); if (ret < 0) return ret; ret = asoc_simple_card_set_dailink_name(dev, dai_link, "fe.%s", dai_link->cpu_dai_name); if (ret < 0) return ret; /* card->num_links includes Codec */ asoc_simple_card_canonicalize_cpu(dai_link, (card->num_links - 1) == 1); } else { /* FE is dummy */ dai_link->cpu_of_node = NULL; dai_link->cpu_dai_name = "snd-soc-dummy-dai"; dai_link->cpu_name = "snd-soc-dummy"; /* BE settings */ dai_link->no_pcm = 1; dai_link->be_hw_params_fixup = asoc_graph_card_be_hw_params_fixup; ret = asoc_simple_card_parse_graph_codec(ep, dai_link); if (ret < 0) return ret; ret = asoc_simple_card_parse_clk_codec(dev, ep, dai_link, dai_props); if (ret < 0) return ret; ret = asoc_simple_card_set_dailink_name(dev, dai_link, "be.%s", dai_link->codec_dai_name); if (ret < 0) return ret; snd_soc_of_parse_audio_prefix(card, &priv->codec_conf, dai_link->codec_of_node, "prefix"); } ret = snd_soc_of_parse_tdm_slot(ep, &dai_props->tx_slot_mask, &dai_props->rx_slot_mask, &dai_props->slots, &dai_props->slot_width); if (ret) return ret; ret = asoc_simple_card_canonicalize_dailink(dai_link); if (ret < 0) return ret; dai_link->dai_fmt = daifmt; dai_link->dpcm_playback = 1; dai_link->dpcm_capture = 1; dai_link->ops = &asoc_graph_card_ops; dai_link->init = asoc_graph_card_dai_init; dev_dbg(dev, "\t%s / %04x / %d\n", dai_link->name, dai_link->dai_fmt, dai_props->sysclk); return 0; } static int asoc_graph_card_parse_of(struct graph_card_data *priv) { struct of_phandle_iterator it; struct device *dev = graph_priv_to_dev(priv); struct snd_soc_card *card = graph_priv_to_card(priv); struct device_node *node = dev->of_node; struct device_node *cpu_port; struct device_node *cpu_ep; struct device_node *codec_ep; struct device_node *rcpu_ep; unsigned int daifmt = 0; int dai_idx, ret; int rc, codec; if (!node) return -EINVAL; /* * we need to consider "widgets", "mclk-fs" around here * see simple-card */ ret = snd_soc_of_parse_audio_routing(card, "routing"); if (ret) return ret; /* sampling rate convert */ of_property_read_u32(node, "convert-rate", &priv->convert_rate); /* channels transfer */ of_property_read_u32(node, "convert-channels", &priv->convert_channels); /* * it supports multi CPU, single CODEC only here * see asoc_graph_get_dais_count */ /* find 1st codec */ of_for_each_phandle(&it, rc, node, "dais", NULL, 0) { cpu_port = it.node; cpu_ep = of_get_next_child(cpu_port, NULL); codec_ep = of_graph_get_remote_endpoint(cpu_ep); rcpu_ep = of_graph_get_remote_endpoint(codec_ep); of_node_put(cpu_port); of_node_put(cpu_ep); of_node_put(codec_ep); of_node_put(rcpu_ep); if (!codec_ep) continue; if (rcpu_ep != cpu_ep) { dev_err(dev, "remote-endpoint missmatch (%s/%s/%s)\n", cpu_ep->name, codec_ep->name, rcpu_ep->name); ret = -EINVAL; goto parse_of_err; } ret = asoc_simple_card_parse_daifmt(dev, cpu_ep, codec_ep, NULL, &daifmt); if (ret < 0) goto parse_of_err; } dai_idx = 0; for (codec = 0; codec < 2; codec++) { /* * To listup valid sounds continuously, * detect all CPU-dummy first, and * detect all dummy-Codec second */ of_for_each_phandle(&it, rc, node, "dais", NULL, 0) { cpu_port = it.node; cpu_ep = of_get_next_child(cpu_port, NULL); codec_ep = of_graph_get_remote_endpoint(cpu_ep); of_node_put(cpu_port); of_node_put(cpu_ep); of_node_put(codec_ep); if (codec) { if (!codec_ep) continue; /* Back-End (= Codec) */ ret = asoc_graph_card_dai_link_of(codec_ep, priv, daifmt, dai_idx++, 0); if (ret < 0) goto parse_of_err; } else { /* Front-End (= CPU) */ ret = asoc_graph_card_dai_link_of(cpu_ep, priv, daifmt, dai_idx++, 1); if (ret < 0) goto parse_of_err; } } } ret = asoc_simple_card_parse_card_name(card, NULL); if (ret) goto parse_of_err; dev_dbg(dev, "New card: %s\n", card->name ? card->name : ""); dev_dbg(dev, "convert_rate %d\n", priv->convert_rate); dev_dbg(dev, "convert_channels %d\n", priv->convert_channels); ret = 0; parse_of_err: return ret; } static int asoc_graph_get_dais_count(struct device *dev) { struct of_phandle_iterator it; struct device_node *node = dev->of_node; struct device_node *cpu_port; struct device_node *cpu_ep; struct device_node *codec_ep; int count = 0; int rc; of_for_each_phandle(&it, rc, node, "dais", NULL, 0) { cpu_port = it.node; cpu_ep = of_get_next_child(cpu_port, NULL); codec_ep = of_graph_get_remote_endpoint(cpu_ep); of_node_put(cpu_port); of_node_put(cpu_ep); of_node_put(codec_ep); if (cpu_ep) count++; if (codec_ep) count++; } return count; } static int asoc_graph_card_probe(struct platform_device *pdev) { struct graph_card_data *priv; struct snd_soc_dai_link *dai_link; struct asoc_simple_dai *dai_props; struct device *dev = &pdev->dev; struct snd_soc_card *card; int num, ret; /* Allocate the private data and the DAI link array */ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; num = asoc_graph_get_dais_count(dev); if (num == 0) return -EINVAL; dai_props = devm_kzalloc(dev, sizeof(*dai_props) * num, GFP_KERNEL); dai_link = devm_kzalloc(dev, sizeof(*dai_link) * num, GFP_KERNEL); if (!dai_props || !dai_link) return -ENOMEM; priv->dai_props = dai_props; priv->dai_link = dai_link; /* Init snd_soc_card */ card = graph_priv_to_card(priv); card->owner = THIS_MODULE; card->dev = dev; card->dai_link = priv->dai_link; card->num_links = num; 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) return ret; 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", .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 ");