// SPDX-License-Identifier: GPL-2.0 // // ASoC simple sound card support // // Copyright (C) 2012 Renesas Solutions Corp. // Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> #include <linux/clk.h> #include <linux/device.h> #include <linux/module.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/string.h> #include <sound/simple_card.h> #include <sound/soc-dai.h> #include <sound/soc.h> 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; /* single codec */ struct snd_soc_dai_link_component platform; unsigned int mclk_fs; } *dai_props; unsigned int mclk_fs; struct asoc_simple_jack hp_jack; struct asoc_simple_jack mic_jack; struct snd_soc_dai_link *dai_link; }; #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 int asoc_simple_set_clk_rate(struct asoc_simple_dai *simple_dai, unsigned long rate) { if (!simple_dai->clk) return 0; if (clk_get_rate(simple_dai->clk) == rate) return 0; return clk_set_rate(simple_dai->clk, rate); } static int asoc_simple_card_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params) { struct snd_soc_pcm_runtime *rtd = substream->private_data; struct snd_soc_dai *codec_dai = rtd->codec_dai; struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 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); unsigned int mclk, mclk_fs = 0; int ret = 0; if (priv->mclk_fs) mclk_fs = priv->mclk_fs; else if (dai_props->mclk_fs) mclk_fs = dai_props->mclk_fs; if (mclk_fs) { mclk = params_rate(params) * mclk_fs; ret = asoc_simple_set_clk_rate(&dai_props->codec_dai, mclk); if (ret < 0) return ret; ret = asoc_simple_set_clk_rate(&dai_props->cpu_dai, mclk); if (ret < 0) return ret; ret = snd_soc_dai_set_sysclk(codec_dai, 0, mclk, SND_SOC_CLOCK_IN); if (ret && ret != -ENOTSUPP) goto err; ret = snd_soc_dai_set_sysclk(cpu_dai, 0, mclk, SND_SOC_CLOCK_OUT); if (ret && ret != -ENOTSUPP) goto err; } return 0; err: return ret; } static const struct snd_soc_ops asoc_simple_card_ops = { .startup = asoc_simple_card_startup, .shutdown = asoc_simple_card_shutdown, .hw_params = asoc_simple_card_hw_params, }; 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 snd_soc_dai *codec = rtd->codec_dai; struct snd_soc_dai *cpu = rtd->cpu_dai; struct simple_dai_props *dai_props = simple_priv_to_props(priv, rtd->num); int ret; ret = asoc_simple_card_init_dai(codec, &dai_props->codec_dai); if (ret < 0) return ret; ret = asoc_simple_card_init_dai(cpu, &dai_props->cpu_dai); if (ret < 0) return ret; return 0; } static int asoc_simple_card_dai_link_of(struct device_node *node, struct simple_card_data *priv, int idx, 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, idx); struct simple_dai_props *dai_props = simple_priv_to_props(priv, idx); struct asoc_simple_dai *cpu_dai = &dai_props->cpu_dai; struct asoc_simple_dai *codec_dai = &dai_props->codec_dai; struct device_node *cpu = NULL; struct device_node *plat = NULL; struct device_node *codec = NULL; char prop[128]; char *prefix = ""; int ret, single_cpu; /* For single DAI link & old style of DT node */ if (is_top_level_node) prefix = PREFIX; snprintf(prop, sizeof(prop), "%scpu", prefix); cpu = of_get_child_by_name(node, prop); if (!cpu) { ret = -EINVAL; dev_err(dev, "%s: Can't find %s DT node\n", __func__, prop); goto dai_link_of_err; } snprintf(prop, sizeof(prop), "%splat", prefix); plat = of_get_child_by_name(node, prop); snprintf(prop, sizeof(prop), "%scodec", prefix); codec = of_get_child_by_name(node, prop); if (!codec) { ret = -EINVAL; dev_err(dev, "%s: Can't find %s DT node\n", __func__, prop); goto dai_link_of_err; } ret = asoc_simple_card_parse_daifmt(dev, node, codec, prefix, &dai_link->dai_fmt); if (ret < 0) goto dai_link_of_err; of_property_read_u32(node, "mclk-fs", &dai_props->mclk_fs); ret = asoc_simple_card_parse_cpu(cpu, dai_link, DAI, CELL, &single_cpu); if (ret < 0) goto dai_link_of_err; ret = asoc_simple_card_parse_codec(codec, dai_link, DAI, CELL); if (ret < 0) goto dai_link_of_err; ret = asoc_simple_card_parse_platform(plat, dai_link, DAI, CELL); if (ret < 0) goto dai_link_of_err; ret = asoc_simple_card_of_parse_tdm(cpu, cpu_dai); if (ret < 0) goto dai_link_of_err; ret = asoc_simple_card_of_parse_tdm(codec, codec_dai); if (ret < 0) goto dai_link_of_err; ret = asoc_simple_card_parse_clk_cpu(dev, cpu, dai_link, cpu_dai); if (ret < 0) goto dai_link_of_err; ret = asoc_simple_card_parse_clk_codec(dev, codec, dai_link, codec_dai); if (ret < 0) goto dai_link_of_err; ret = asoc_simple_card_canonicalize_dailink(dai_link); if (ret < 0) goto dai_link_of_err; ret = asoc_simple_card_set_dailink_name(dev, dai_link, "%s-%s", dai_link->cpu_dai_name, dai_link->codecs->dai_name); if (ret < 0) goto dai_link_of_err; dai_link->ops = &asoc_simple_card_ops; dai_link->init = asoc_simple_card_dai_init; asoc_simple_card_canonicalize_cpu(dai_link, single_cpu); dai_link_of_err: of_node_put(cpu); of_node_put(codec); return ret; } static int asoc_simple_card_parse_aux_devs(struct device_node *node, struct simple_card_data *priv) { struct device *dev = simple_priv_to_dev(priv); struct device_node *aux_node; struct snd_soc_card *card = simple_priv_to_card(priv); int i, n, len; if (!of_find_property(node, PREFIX "aux-devs", &len)) return 0; /* Ok to have no aux-devs */ n = len / sizeof(__be32); if (n <= 0) return -EINVAL; card->aux_dev = devm_kcalloc(dev, n, sizeof(*card->aux_dev), GFP_KERNEL); if (!card->aux_dev) return -ENOMEM; for (i = 0; i < n; i++) { aux_node = of_parse_phandle(node, PREFIX "aux-devs", i); if (!aux_node) return -EINVAL; card->aux_dev[i].codec_of_node = aux_node; } card->num_aux_devs = n; return 0; } static int asoc_simple_card_parse_of(struct simple_card_data *priv) { struct device *dev = simple_priv_to_dev(priv); struct snd_soc_card *card = simple_priv_to_card(priv); struct device_node *dai_link; struct device_node *node = dev->of_node; int ret; if (!node) return -EINVAL; dai_link = of_get_child_by_name(node, PREFIX "dai-link"); ret = asoc_simple_card_of_parse_widgets(card, PREFIX); if (ret < 0) goto card_parse_end; ret = asoc_simple_card_of_parse_routing(card, PREFIX, 1); if (ret < 0) goto card_parse_end; /* Factor to mclk, used in hw_params() */ of_property_read_u32(node, PREFIX "mclk-fs", &priv->mclk_fs); /* Single/Muti DAI link(s) & New style of DT node */ if (dai_link) { struct device_node *np = NULL; int i = 0; for_each_child_of_node(node, np) { dev_dbg(dev, "\tlink %d:\n", i); ret = asoc_simple_card_dai_link_of(np, priv, i, false); if (ret < 0) { of_node_put(np); goto card_parse_end; } i++; } } else { /* For single DAI link & old style of DT node */ ret = asoc_simple_card_dai_link_of(node, priv, 0, true); if (ret < 0) goto card_parse_end; } ret = asoc_simple_card_parse_card_name(card, PREFIX); if (ret < 0) goto card_parse_end; ret = asoc_simple_card_parse_aux_devs(node, priv); card_parse_end: of_node_put(dai_link); return ret; } static int asoc_simple_soc_card_probe(struct snd_soc_card *card) { struct simple_card_data *priv = snd_soc_card_get_drvdata(card); int ret; ret = asoc_simple_card_init_hp(card, &priv->hp_jack, PREFIX); if (ret < 0) return ret; ret = asoc_simple_card_init_mic(card, &priv->mic_jack, PREFIX); if (ret < 0) return ret; return 0; } 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 device *dev = &pdev->dev; struct device_node *np = dev->of_node; struct snd_soc_card *card; int num, ret, i; /* Get the number of DAI links */ if (np && of_get_child_by_name(np, PREFIX "dai-link")) num = of_get_child_count(np); else num = 1; /* Allocate the private data and the DAI link array */ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; dai_props = devm_kcalloc(dev, num, sizeof(*dai_props), GFP_KERNEL); dai_link = devm_kcalloc(dev, num, sizeof(*dai_link), GFP_KERNEL); if (!dai_props || !dai_link) 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 < num; 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; /* 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 = num; card->probe = asoc_simple_soc_card_probe; if (np && of_device_is_available(np)) { ret = asoc_simple_card_parse_of(priv); if (ret < 0) { if (ret != -EPROBE_DEFER) dev_err(dev, "parse error %d\n", ret); goto err; } } else { struct asoc_simple_card_info *cinfo; struct snd_soc_dai_link_component *codecs; struct snd_soc_dai_link_component *platform; cinfo = dev->platform_data; if (!cinfo) { dev_err(dev, "no info for asoc-simple-card\n"); return -EINVAL; } if (!cinfo->name || !cinfo->codec_dai.name || !cinfo->codec || !cinfo->platform || !cinfo->cpu_dai.name) { dev_err(dev, "insufficient asoc_simple_card_info settings\n"); return -EINVAL; } codecs = dai_link->codecs; codecs->name = cinfo->codec; codecs->dai_name = cinfo->codec_dai.name; platform = dai_link->platform; platform->name = cinfo->platform; card->name = (cinfo->card) ? cinfo->card : cinfo->name; dai_link->name = cinfo->name; dai_link->stream_name = cinfo->name; dai_link->cpu_dai_name = cinfo->cpu_dai.name; dai_link->dai_fmt = cinfo->daifmt; dai_link->init = asoc_simple_card_dai_init; memcpy(&priv->dai_props->cpu_dai, &cinfo->cpu_dai, sizeof(priv->dai_props->cpu_dai)); memcpy(&priv->dai_props->codec_dai, &cinfo->codec_dai, sizeof(priv->dai_props->codec_dai)); } 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 = "simple-audio-card", }, {}, }; MODULE_DEVICE_TABLE(of, asoc_simple_of_match); static struct platform_driver asoc_simple_card = { .driver = { .name = "asoc-simple-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-card"); MODULE_LICENSE("GPL v2"); MODULE_DESCRIPTION("ASoC Simple Sound Card"); MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");