// SPDX-License-Identifier: GPL-2.0 // // ASoC audio graph sound card support // // Copyright (C) 2016 Renesas Solutions Corp. // Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> // // based on ${LINUX}/sound/soc/generic/simple-card.c #include <linux/clk.h> #include <linux/device.h> #include <linux/gpio.h> #include <linux/gpio/consumer.h> #include <linux/module.h> #include <linux/of.h> #include <linux/of_device.h> #include <linux/of_gpio.h> #include <linux/of_graph.h> #include <linux/platform_device.h> #include <linux/string.h> #include <sound/simple_card_utils.h> struct graph_card_data { struct snd_soc_card snd_card; struct graph_dai_props { struct asoc_simple_dai cpu_dai; struct asoc_simple_dai codec_dai; 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; struct gpio_desc *pa_gpio; }; static int asoc_graph_card_outdrv_event(struct snd_soc_dapm_widget *w, struct snd_kcontrol *kcontrol, int event) { struct snd_soc_dapm_context *dapm = w->dapm; struct graph_card_data *priv = snd_soc_card_get_drvdata(dapm->card); switch (event) { case SND_SOC_DAPM_POST_PMU: gpiod_set_value_cansleep(priv->pa_gpio, 1); break; case SND_SOC_DAPM_PRE_PMD: gpiod_set_value_cansleep(priv->pa_gpio, 0); break; default: return -EINVAL; } return 0; } static const struct snd_soc_dapm_widget asoc_graph_card_dapm_widgets[] = { SND_SOC_DAPM_OUT_DRV_E("Amplifier", SND_SOC_NOPM, 0, 0, NULL, 0, asoc_graph_card_outdrv_event, SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD), }; #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 graph_dai_props *dai_props = graph_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_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 graph_dai_props *dai_props = graph_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_graph_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 graph_card_data *priv = snd_soc_card_get_drvdata(rtd->card); struct graph_dai_props *dai_props = graph_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 = 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_graph_card_ops = { .startup = asoc_graph_card_startup, .shutdown = asoc_graph_card_shutdown, .hw_params = asoc_graph_card_hw_params, }; 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 *codec = rtd->codec_dai; struct snd_soc_dai *cpu = rtd->cpu_dai; struct graph_dai_props *dai_props = graph_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_graph_card_dai_link_of(struct device_node *cpu_port, struct graph_card_data *priv, int idx) { struct device *dev = graph_priv_to_dev(priv); struct snd_soc_dai_link *dai_link = graph_priv_to_link(priv, idx); struct graph_dai_props *dai_props = graph_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_ep = of_get_next_child(cpu_port, NULL); struct device_node *codec_ep = of_graph_get_remote_endpoint(cpu_ep); struct device_node *rcpu_ep = of_graph_get_remote_endpoint(codec_ep); int ret; if (rcpu_ep != cpu_ep) { dev_err(dev, "remote-endpoint mismatch (%s/%s/%s)\n", cpu_ep->name, codec_ep->name, rcpu_ep->name); ret = -EINVAL; goto dai_link_of_err; } ret = asoc_simple_card_parse_daifmt(dev, cpu_ep, codec_ep, NULL, &dai_link->dai_fmt); if (ret < 0) goto dai_link_of_err; of_property_read_u32(rcpu_ep, "mclk-fs", &dai_props->mclk_fs); ret = asoc_simple_card_parse_graph_cpu(cpu_ep, dai_link); if (ret < 0) goto dai_link_of_err; ret = asoc_simple_card_parse_graph_codec(codec_ep, dai_link); if (ret < 0) goto dai_link_of_err; ret = asoc_simple_card_of_parse_tdm(cpu_ep, cpu_dai); if (ret < 0) goto dai_link_of_err; ret = asoc_simple_card_of_parse_tdm(codec_ep, codec_dai); if (ret < 0) goto dai_link_of_err; ret = asoc_simple_card_parse_clk_cpu(dev, cpu_ep, dai_link, cpu_dai); if (ret < 0) goto dai_link_of_err; ret = asoc_simple_card_parse_clk_codec(dev, codec_ep, 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->codec_dai_name); if (ret < 0) goto dai_link_of_err; dai_link->ops = &asoc_graph_card_ops; dai_link->init = asoc_graph_card_dai_init; asoc_simple_card_canonicalize_cpu(dai_link, of_graph_get_endpoint_count(dai_link->cpu_of_node) == 1); dai_link_of_err: of_node_put(cpu_ep); of_node_put(rcpu_ep); of_node_put(codec_ep); return ret; } 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; int rc, idx = 0; int ret; ret = asoc_simple_card_of_parse_widgets(card, NULL); if (ret < 0) return ret; ret = asoc_simple_card_of_parse_routing(card, NULL, 1); if (ret < 0) return ret; /* Factor to mclk, used in hw_params() */ of_property_read_u32(node, "mclk-fs", &priv->mclk_fs); of_for_each_phandle(&it, rc, node, "dais", NULL, 0) { ret = asoc_graph_card_dai_link_of(it.node, priv, idx++); if (ret < 0) { of_node_put(it.node); return ret; } } return asoc_simple_card_parse_card_name(card, NULL); } static int asoc_graph_get_dais_count(struct device *dev) { struct of_phandle_iterator it; struct device_node *node = dev->of_node; int count = 0; int rc; of_for_each_phandle(&it, rc, node, "dais", NULL, 0) count++; return count; } static int asoc_graph_soc_card_probe(struct snd_soc_card *card) { struct graph_card_data *priv = snd_soc_card_get_drvdata(card); int ret; ret = asoc_simple_card_init_hp(card, &priv->hp_jack, NULL); if (ret < 0) return ret; ret = asoc_simple_card_init_mic(card, &priv->mic_jack, NULL); if (ret < 0) return ret; return 0; } static int asoc_graph_card_probe(struct platform_device *pdev) { struct graph_card_data *priv; struct snd_soc_dai_link *dai_link; struct graph_dai_props *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_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; priv->pa_gpio = devm_gpiod_get_optional(dev, "pa", GPIOD_OUT_LOW); if (IS_ERR(priv->pa_gpio)) { ret = PTR_ERR(priv->pa_gpio); dev_err(dev, "failed to get amplifier gpio: %d\n", ret); return ret; } 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 = dai_link; card->num_links = num; card->dapm_widgets = asoc_graph_card_dapm_widgets; card->num_dapm_widgets = ARRAY_SIZE(asoc_graph_card_dapm_widgets); card->probe = asoc_graph_soc_card_probe; 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-card", }, {}, }; MODULE_DEVICE_TABLE(of, asoc_graph_of_match); static struct platform_driver asoc_graph_card = { .driver = { .name = "asoc-audio-graph-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-card"); MODULE_LICENSE("GPL v2"); MODULE_DESCRIPTION("ASoC Audio Graph Sound Card"); MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");