// SPDX-License-Identifier: GPL-2.0 // // ASoC simple SCU sound card support // // Copyright (C) 2015 Renesas Solutions Corp. // Kuninori Morimoto // // based on ${LINUX}/sound/soc/generic/simple-card.c #include #include #include #include #include #include #include #include #include #include #include struct simple_card_data { struct snd_soc_card snd_card; struct simple_dai_props { struct asoc_simple_dai *cpu_dai; struct asoc_simple_dai *codec_dai; struct snd_soc_dai_link_component codecs; struct snd_soc_dai_link_component platform; struct asoc_simple_card_data adata; struct snd_soc_codec_conf *codec_conf; } *dai_props; struct snd_soc_dai_link *dai_link; struct asoc_simple_dai *dais; struct asoc_simple_card_data adata; struct snd_soc_codec_conf *codec_conf; }; #define simple_priv_to_card(priv) (&(priv)->snd_card) #define simple_priv_to_props(priv, i) ((priv)->dai_props + (i)) #define simple_priv_to_dev(priv) (simple_priv_to_card(priv)->dev) #define simple_priv_to_link(priv, i) (simple_priv_to_card(priv)->dai_link + (i)) #define DAI "sound-dai" #define CELL "#sound-dai-cells" #define PREFIX "simple-audio-card," static int asoc_simple_card_startup(struct snd_pcm_substream *substream) { struct snd_soc_pcm_runtime *rtd = substream->private_data; struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card); struct simple_dai_props *dai_props = simple_priv_to_props(priv, rtd->num); int ret; ret = asoc_simple_card_clk_enable(dai_props->cpu_dai); if (ret) return ret; ret = asoc_simple_card_clk_enable(dai_props->codec_dai); if (ret) asoc_simple_card_clk_disable(dai_props->cpu_dai); return ret; } static void asoc_simple_card_shutdown(struct snd_pcm_substream *substream) { struct snd_soc_pcm_runtime *rtd = substream->private_data; struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card); struct simple_dai_props *dai_props = simple_priv_to_props(priv, rtd->num); asoc_simple_card_clk_disable(dai_props->cpu_dai); asoc_simple_card_clk_disable(dai_props->codec_dai); } static const struct snd_soc_ops asoc_simple_card_ops = { .startup = asoc_simple_card_startup, .shutdown = asoc_simple_card_shutdown, }; static int asoc_simple_card_dai_init(struct snd_soc_pcm_runtime *rtd) { struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card); struct simple_dai_props *dai_props = simple_priv_to_props(priv, rtd->num); int ret; ret = asoc_simple_card_init_dai(rtd->codec_dai, dai_props->codec_dai); if (ret < 0) return ret; ret = asoc_simple_card_init_dai(rtd->cpu_dai, dai_props->cpu_dai); if (ret < 0) return ret; return 0; } static int asoc_simple_card_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd, struct snd_pcm_hw_params *params) { struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card); struct simple_dai_props *dai_props = simple_priv_to_props(priv, rtd->num); asoc_simple_card_convert_fixup(&dai_props->adata, params); /* overwrite by top level adata if exist */ asoc_simple_card_convert_fixup(&priv->adata, params); return 0; } static int asoc_simple_card_dai_link_of(struct device_node *link, struct device_node *np, struct device_node *codec, struct simple_card_data *priv, int *dai_idx, int link_idx, int *conf_idx, int is_fe, bool is_top_level_node) { struct device *dev = simple_priv_to_dev(priv); struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, link_idx); struct simple_dai_props *dai_props = simple_priv_to_props(priv, link_idx); struct snd_soc_card *card = simple_priv_to_card(priv); struct asoc_simple_dai *dai; char *prefix = ""; int ret; /* For single DAI link & old style of DT node */ if (is_top_level_node) prefix = PREFIX; if (is_fe) { int is_single_links = 0; struct snd_soc_dai_link_component *codecs; /* BE is dummy */ codecs = dai_link->codecs; codecs->of_node = NULL; codecs->dai_name = "snd-soc-dummy-dai"; codecs->name = "snd-soc-dummy"; /* FE settings */ dai_link->dynamic = 1; dai_link->dpcm_merged_format = 1; dai = dai_props->cpu_dai = &priv->dais[(*dai_idx)++]; ret = asoc_simple_card_parse_cpu(np, dai_link, DAI, CELL, &is_single_links); if (ret) return ret; ret = asoc_simple_card_parse_clk_cpu(dev, np, dai_link, dai); 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; asoc_simple_card_canonicalize_cpu(dai_link, is_single_links); } else { struct snd_soc_codec_conf *cconf; /* 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_simple_card_be_hw_params_fixup; dai = dai_props->codec_dai = &priv->dais[(*dai_idx)++]; cconf = dai_props->codec_conf = &priv->codec_conf[(*conf_idx)++]; ret = asoc_simple_card_parse_codec(np, dai_link, DAI, CELL); if (ret < 0) return ret; ret = asoc_simple_card_parse_clk_codec(dev, np, dai_link, dai); if (ret < 0) return ret; ret = asoc_simple_card_set_dailink_name(dev, dai_link, "be.%s", dai_link->codecs->dai_name); if (ret < 0) return ret; /* check "prefix" from top node */ snd_soc_of_parse_audio_prefix(card, cconf, dai_link->codecs->of_node, PREFIX "prefix"); /* check "prefix" from each node if top doesn't have */ if (!cconf->of_node) snd_soc_of_parse_node_prefix(np, cconf, dai_link->codecs->of_node, "prefix"); } asoc_simple_card_parse_convert(dev, link, prefix, &dai_props->adata); ret = asoc_simple_card_of_parse_tdm(np, dai); if (ret) return ret; ret = asoc_simple_card_canonicalize_dailink(dai_link); if (ret < 0) return ret; ret = asoc_simple_card_parse_daifmt(dev, link, codec, prefix, &dai_link->dai_fmt); if (ret < 0) return ret; dai_link->dpcm_playback = 1; dai_link->dpcm_capture = 1; dai_link->ops = &asoc_simple_card_ops; dai_link->init = asoc_simple_card_dai_init; return 0; } static int asoc_simple_card_parse_of(struct simple_card_data *priv) { struct device *dev = simple_priv_to_dev(priv); struct device_node *top = dev->of_node; struct device_node *node; struct device_node *np; struct device_node *codec; struct snd_soc_card *card = simple_priv_to_card(priv); bool is_fe; int ret, loop; int dai_idx, link_idx, conf_idx; if (!top) return -EINVAL; ret = asoc_simple_card_of_parse_widgets(card, PREFIX); if (ret < 0) return ret; ret = asoc_simple_card_of_parse_routing(card, PREFIX); if (ret < 0) return ret; asoc_simple_card_parse_convert(dev, top, PREFIX, &priv->adata); loop = 1; link_idx = 0; dai_idx = 0; conf_idx = 0; node = of_get_child_by_name(top, PREFIX "dai-link"); if (!node) { node = dev->of_node; loop = 0; } do { codec = of_get_child_by_name(node, loop ? "codec" : PREFIX "codec"); if (!codec) return -ENODEV; for_each_child_of_node(node, np) { is_fe = (np != codec); ret = asoc_simple_card_dai_link_of(node, np, codec, priv, &dai_idx, link_idx++, &conf_idx, is_fe, !loop); if (ret < 0) return ret; } node = of_get_next_child(top, node); } while (loop && node); ret = asoc_simple_card_parse_card_name(card, PREFIX); if (ret < 0) return ret; return 0; } static void asoc_simple_card_get_dais_count(struct device *dev, int *link_num, int *dais_num, int *ccnf_num) { struct device_node *top = dev->of_node; struct device_node *node; int loop; int num; /* * link_num : number of links. * CPU-Codec / CPU-dummy / dummy-Codec * dais_num : number of DAIs * ccnf_num : number of codec_conf * same number for "dummy-Codec" * * ex1) * CPU0 --- Codec0 link : 5 * CPU1 --- Codec1 dais : 7 * CPU2 -/ ccnf : 1 * CPU3 --- Codec2 * * => 5 links = 2xCPU-Codec + 2xCPU-dummy + 1xdummy-Codec * => 7 DAIs = 4xCPU + 3xCodec * => 1 ccnf = 1xdummy-Codec * * ex2) * CPU0 --- Codec0 link : 5 * CPU1 --- Codec1 dais : 6 * CPU2 -/ ccnf : 1 * CPU3 -/ * * => 5 links = 1xCPU-Codec + 3xCPU-dummy + 1xdummy-Codec * => 6 DAIs = 4xCPU + 2xCodec * => 1 ccnf = 1xdummy-Codec * * ex3) * CPU0 --- Codec0 link : 6 * CPU1 -/ dais : 6 * CPU2 --- Codec1 ccnf : 2 * CPU3 -/ * * => 6 links = 0xCPU-Codec + 4xCPU-dummy + 2xdummy-Codec * => 6 DAIs = 4xCPU + 2xCodec * => 2 ccnf = 2xdummy-Codec */ if (!top) { (*link_num) = 1; (*dais_num) = 2; (*ccnf_num) = 0; return; } loop = 1; node = of_get_child_by_name(top, PREFIX "dai-link"); if (!node) { node = top; loop = 0; } do { num = of_get_child_count(node); (*dais_num) += num; if (num > 2) { (*link_num) += num; (*ccnf_num)++; } else { (*link_num)++; } node = of_get_next_child(top, node); } while (loop && node); } static int asoc_simple_card_probe(struct platform_device *pdev) { struct simple_card_data *priv; struct snd_soc_dai_link *dai_link; struct simple_dai_props *dai_props; struct asoc_simple_dai *dais; struct snd_soc_card *card; struct snd_soc_codec_conf *cconf; struct device *dev = &pdev->dev; int ret, i; int lnum = 0, dnum = 0, cnum = 0; /* Allocate the private data */ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; asoc_simple_card_get_dais_count(dev, &lnum, &dnum, &cnum); if (!lnum || !dnum) return -EINVAL; dai_props = devm_kcalloc(dev, lnum, sizeof(*dai_props), GFP_KERNEL); dai_link = devm_kcalloc(dev, lnum, sizeof(*dai_link), GFP_KERNEL); dais = devm_kcalloc(dev, dnum, sizeof(*dais), GFP_KERNEL); cconf = devm_kcalloc(dev, cnum, sizeof(*cconf), GFP_KERNEL); if (!dai_props || !dai_link || !dais) return -ENOMEM; /* * Use snd_soc_dai_link_component instead of legacy style * It is codec only. but cpu/platform will be supported in the future. * see * soc-core.c :: snd_soc_init_multicodec() */ for (i = 0; i < lnum; i++) { dai_link[i].codecs = &dai_props[i].codecs; dai_link[i].num_codecs = 1; dai_link[i].platform = &dai_props[i].platform; } priv->dai_props = dai_props; priv->dai_link = dai_link; priv->dais = dais; priv->codec_conf = cconf; /* Init snd_soc_card */ card = simple_priv_to_card(priv); card->owner = THIS_MODULE; card->dev = dev; card->dai_link = priv->dai_link; card->num_links = lnum; card->codec_conf = cconf; card->num_configs = cnum; ret = asoc_simple_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_simple_card_remove(struct platform_device *pdev) { struct snd_soc_card *card = platform_get_drvdata(pdev); return asoc_simple_card_clean_reference(card); } static const struct of_device_id asoc_simple_of_match[] = { { .compatible = "renesas,rsrc-card", }, { .compatible = "simple-scu-audio-card", }, {}, }; MODULE_DEVICE_TABLE(of, asoc_simple_of_match); static struct platform_driver asoc_simple_card = { .driver = { .name = "simple-scu-audio-card", .pm = &snd_soc_pm_ops, .of_match_table = asoc_simple_of_match, }, .probe = asoc_simple_card_probe, .remove = asoc_simple_card_remove, }; module_platform_driver(asoc_simple_card); MODULE_ALIAS("platform:asoc-simple-scu-card"); MODULE_LICENSE("GPL v2"); MODULE_DESCRIPTION("ASoC Simple SCU Sound Card"); MODULE_AUTHOR("Kuninori Morimoto ");