// SPDX-License-Identifier: GPL-2.0 // // ASoC audio graph sound card support // // Copyright (C) 2016 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 #include #define DPCM_SELECTABLE 1 #define PREFIX "audio-graph-card," static int graph_outdrv_event(struct snd_soc_dapm_widget *w, struct snd_kcontrol *kcontrol, int event) { struct snd_soc_dapm_context *dapm = w->dapm; struct asoc_simple_priv *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 graph_dapm_widgets[] = { SND_SOC_DAPM_OUT_DRV_E("Amplifier", SND_SOC_NOPM, 0, 0, NULL, 0, graph_outdrv_event, SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD), }; static const struct snd_soc_ops graph_ops = { .startup = asoc_simple_startup, .shutdown = asoc_simple_shutdown, .hw_params = asoc_simple_hw_params, }; static int graph_get_dai_id(struct device_node *ep) { struct device_node *node; struct device_node *endpoint; struct of_endpoint info; int i, id; const u32 *reg; int ret; /* use driver specified DAI ID if exist */ ret = snd_soc_get_dai_id(ep); if (ret != -ENOTSUPP) return ret; /* use endpoint/port reg if exist */ ret = of_graph_parse_endpoint(ep, &info); if (ret == 0) { /* * Because it will count port/endpoint if it doesn't have "reg". * But, we can't judge whether it has "no reg", or "reg = <0>" * only of_graph_parse_endpoint(). * We need to check "reg" property */ if (of_get_property(ep, "reg", NULL)) return info.id; node = of_get_parent(ep); reg = of_get_property(node, "reg", NULL); of_node_put(node); if (reg) return info.port; } node = of_graph_get_port_parent(ep); /* * Non HDMI sound case, counting port/endpoint on its DT * is enough. Let's count it. */ i = 0; id = -1; for_each_endpoint_of_node(node, endpoint) { if (endpoint == ep) id = i; i++; } of_node_put(node); if (id < 0) return -ENODEV; return id; } static int asoc_simple_parse_dai(struct device_node *ep, struct snd_soc_dai_link_component *dlc, int *is_single_link) { struct device_node *node; struct of_phandle_args args; int ret; if (!ep) return 0; node = of_graph_get_port_parent(ep); /* Get dai->name */ args.np = node; args.args[0] = graph_get_dai_id(ep); args.args_count = (of_graph_get_endpoint_count(node) > 1); /* * FIXME * * Here, dlc->dai_name is pointer to CPU/Codec DAI name. * If user unbinded CPU or Codec driver, but not for Sound Card, * dlc->dai_name is keeping unbinded CPU or Codec * driver's pointer. * * If user re-bind CPU or Codec driver again, ALSA SoC will try * to rebind Card via snd_soc_try_rebind_card(), but because of * above reason, it might can't bind Sound Card. * Because Sound Card is pointing to released dai_name pointer. * * To avoid this rebind Card issue, * 1) It needs to alloc memory to keep dai_name eventhough * CPU or Codec driver was unbinded, or * 2) user need to rebind Sound Card everytime * if he unbinded CPU or Codec. */ ret = snd_soc_get_dai_name(&args, &dlc->dai_name); if (ret < 0) { of_node_put(node); return ret; } dlc->of_node = node; if (is_single_link) *is_single_link = of_graph_get_endpoint_count(node) == 1; return 0; } static void graph_parse_convert(struct device *dev, struct device_node *ep, struct asoc_simple_data *adata) { struct device_node *top = dev->of_node; struct device_node *port = of_get_parent(ep); struct device_node *ports = of_get_parent(port); struct device_node *node = of_graph_get_port_parent(ep); asoc_simple_parse_convert(dev, top, NULL, adata); asoc_simple_parse_convert(dev, node, PREFIX, adata); asoc_simple_parse_convert(dev, ports, NULL, adata); asoc_simple_parse_convert(dev, port, NULL, adata); asoc_simple_parse_convert(dev, ep, NULL, adata); of_node_put(port); of_node_put(ports); of_node_put(node); } static void graph_parse_mclk_fs(struct device_node *top, struct device_node *ep, struct simple_dai_props *props) { struct device_node *port = of_get_parent(ep); struct device_node *ports = of_get_parent(port); struct device_node *node = of_graph_get_port_parent(ep); of_property_read_u32(top, "mclk-fs", &props->mclk_fs); of_property_read_u32(ports, "mclk-fs", &props->mclk_fs); of_property_read_u32(port, "mclk-fs", &props->mclk_fs); of_property_read_u32(ep, "mclk-fs", &props->mclk_fs); of_node_put(port); of_node_put(ports); of_node_put(node); } static int graph_dai_link_of_dpcm(struct asoc_simple_priv *priv, struct device_node *cpu_ep, struct device_node *codec_ep, struct link_info *li, int dup_codec) { struct device *dev = simple_priv_to_dev(priv); struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link); struct simple_dai_props *dai_props = simple_priv_to_props(priv, li->link); struct device_node *top = dev->of_node; struct device_node *ep = li->cpu ? cpu_ep : codec_ep; struct device_node *port; struct device_node *ports; struct device_node *node; struct asoc_simple_dai *dai; struct snd_soc_dai_link_component *cpus = dai_link->cpus; struct snd_soc_dai_link_component *codecs = dai_link->codecs; int ret; /* Do it all CPU endpoint, and 1st Codec endpoint */ if (!li->cpu && dup_codec) return 0; port = of_get_parent(ep); ports = of_get_parent(port); node = of_graph_get_port_parent(ep); li->link++; dev_dbg(dev, "link_of DPCM (%pOF)\n", ep); if (li->cpu) { int is_single_links = 0; /* BE is dummy */ 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[li->dais++]; ret = asoc_simple_parse_cpu(ep, dai_link, &is_single_links); if (ret) goto out_put_node; ret = asoc_simple_parse_clk_cpu(dev, ep, dai_link, dai); if (ret < 0) goto out_put_node; ret = asoc_simple_set_dailink_name(dev, dai_link, "fe.%s", cpus->dai_name); if (ret < 0) goto out_put_node; /* card->num_links includes Codec */ asoc_simple_canonicalize_cpu(dai_link, is_single_links); } else { struct snd_soc_codec_conf *cconf; /* FE is dummy */ cpus->of_node = NULL; cpus->dai_name = "snd-soc-dummy-dai"; cpus->name = "snd-soc-dummy"; /* BE settings */ dai_link->no_pcm = 1; dai_link->be_hw_params_fixup = asoc_simple_be_hw_params_fixup; dai = dai_props->codec_dai = &priv->dais[li->dais++]; cconf = dai_props->codec_conf = &priv->codec_conf[li->conf++]; ret = asoc_simple_parse_codec(ep, dai_link); if (ret < 0) goto out_put_node; ret = asoc_simple_parse_clk_codec(dev, ep, dai_link, dai); if (ret < 0) goto out_put_node; ret = asoc_simple_set_dailink_name(dev, dai_link, "be.%s", codecs->dai_name); if (ret < 0) goto out_put_node; /* check "prefix" from top node */ snd_soc_of_parse_node_prefix(top, cconf, codecs->of_node, "prefix"); snd_soc_of_parse_node_prefix(node, cconf, codecs->of_node, PREFIX "prefix"); snd_soc_of_parse_node_prefix(ports, cconf, codecs->of_node, "prefix"); snd_soc_of_parse_node_prefix(port, cconf, codecs->of_node, "prefix"); } graph_parse_convert(dev, ep, &dai_props->adata); graph_parse_mclk_fs(top, ep, dai_props); asoc_simple_canonicalize_platform(dai_link); ret = asoc_simple_parse_tdm(ep, dai); if (ret) goto out_put_node; ret = asoc_simple_parse_daifmt(dev, cpu_ep, codec_ep, NULL, &dai_link->dai_fmt); if (ret < 0) goto out_put_node; dai_link->dpcm_playback = 1; dai_link->dpcm_capture = 1; dai_link->ops = &graph_ops; dai_link->init = asoc_simple_dai_init; out_put_node: of_node_put(ports); of_node_put(port); of_node_put(node); return ret; } static int graph_dai_link_of(struct asoc_simple_priv *priv, struct device_node *cpu_ep, struct device_node *codec_ep, struct link_info *li) { struct device *dev = simple_priv_to_dev(priv); struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link); struct simple_dai_props *dai_props = simple_priv_to_props(priv, li->link); struct device_node *top = dev->of_node; struct asoc_simple_dai *cpu_dai; struct asoc_simple_dai *codec_dai; int ret, single_cpu = 0; /* Do it only CPU turn */ if (!li->cpu) return 0; dev_dbg(dev, "link_of (%pOF)\n", cpu_ep); li->link++; cpu_dai = dai_props->cpu_dai = &priv->dais[li->dais++]; codec_dai = dai_props->codec_dai = &priv->dais[li->dais++]; /* Factor to mclk, used in hw_params() */ graph_parse_mclk_fs(top, cpu_ep, dai_props); graph_parse_mclk_fs(top, codec_ep, dai_props); ret = asoc_simple_parse_daifmt(dev, cpu_ep, codec_ep, NULL, &dai_link->dai_fmt); if (ret < 0) return ret; ret = asoc_simple_parse_cpu(cpu_ep, dai_link, &single_cpu); if (ret < 0) return ret; ret = asoc_simple_parse_codec(codec_ep, dai_link); if (ret < 0) return ret; ret = asoc_simple_parse_tdm(cpu_ep, cpu_dai); if (ret < 0) return ret; ret = asoc_simple_parse_tdm(codec_ep, codec_dai); if (ret < 0) return ret; ret = asoc_simple_parse_clk_cpu(dev, cpu_ep, dai_link, cpu_dai); if (ret < 0) return ret; ret = asoc_simple_parse_clk_codec(dev, codec_ep, dai_link, codec_dai); if (ret < 0) return ret; ret = asoc_simple_set_dailink_name(dev, dai_link, "%s-%s", dai_link->cpus->dai_name, dai_link->codecs->dai_name); if (ret < 0) return ret; dai_link->ops = &graph_ops; dai_link->init = asoc_simple_dai_init; asoc_simple_canonicalize_cpu(dai_link, single_cpu); asoc_simple_canonicalize_platform(dai_link); return 0; } static int graph_for_each_link(struct asoc_simple_priv *priv, struct link_info *li, int (*func_noml)(struct asoc_simple_priv *priv, struct device_node *cpu_ep, struct device_node *codec_ep, struct link_info *li), int (*func_dpcm)(struct asoc_simple_priv *priv, struct device_node *cpu_ep, struct device_node *codec_ep, struct link_info *li, int dup_codec)) { struct of_phandle_iterator it; struct device *dev = simple_priv_to_dev(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 *codec_port; struct device_node *codec_port_old = NULL; struct asoc_simple_data adata; uintptr_t dpcm_selectable = (uintptr_t)of_device_get_match_data(dev); int rc, ret; /* loop for all listed CPU port */ of_for_each_phandle(&it, rc, node, "dais", NULL, 0) { cpu_port = it.node; cpu_ep = NULL; /* loop for all CPU endpoint */ while (1) { cpu_ep = of_get_next_child(cpu_port, cpu_ep); if (!cpu_ep) break; /* get codec */ codec_ep = of_graph_get_remote_endpoint(cpu_ep); codec_port = of_get_parent(codec_ep); /* get convert-xxx property */ memset(&adata, 0, sizeof(adata)); graph_parse_convert(dev, codec_ep, &adata); graph_parse_convert(dev, cpu_ep, &adata); /* * It is DPCM * if Codec port has many endpoints, * or has convert-xxx property */ if (dpcm_selectable && ((of_get_child_count(codec_port) > 1) || adata.convert_rate || adata.convert_channels)) ret = func_dpcm(priv, cpu_ep, codec_ep, li, (codec_port_old == codec_port)); /* else normal sound */ else ret = func_noml(priv, cpu_ep, codec_ep, li); of_node_put(codec_ep); of_node_put(codec_port); if (ret < 0) return ret; codec_port_old = codec_port; } } return 0; } static int graph_parse_of(struct asoc_simple_priv *priv) { struct snd_soc_card *card = simple_priv_to_card(priv); struct link_info li; int ret; ret = asoc_simple_parse_widgets(card, NULL); if (ret < 0) return ret; ret = asoc_simple_parse_routing(card, NULL); if (ret < 0) return ret; memset(&li, 0, sizeof(li)); for (li.cpu = 1; li.cpu >= 0; li.cpu--) { /* * Detect all CPU first, and Detect all Codec 2nd. * * In Normal sound case, all DAIs are detected * as "CPU-Codec". * * In DPCM sound case, * all CPUs are detected as "CPU-dummy", and * all Codecs are detected as "dummy-Codec". * To avoid random sub-device numbering, * detect "dummy-Codec" in last; */ ret = graph_for_each_link(priv, &li, graph_dai_link_of, graph_dai_link_of_dpcm); if (ret < 0) return ret; } return asoc_simple_parse_card_name(card, NULL); } static int graph_count_noml(struct asoc_simple_priv *priv, struct device_node *cpu_ep, struct device_node *codec_ep, struct link_info *li) { struct device *dev = simple_priv_to_dev(priv); li->link += 1; /* 1xCPU-Codec */ li->dais += 2; /* 1xCPU + 1xCodec */ dev_dbg(dev, "Count As Normal\n"); return 0; } static int graph_count_dpcm(struct asoc_simple_priv *priv, struct device_node *cpu_ep, struct device_node *codec_ep, struct link_info *li, int dup_codec) { struct device *dev = simple_priv_to_dev(priv); li->link++; /* 1xCPU-dummy */ li->dais++; /* 1xCPU */ if (!dup_codec) { li->link++; /* 1xdummy-Codec */ li->conf++; /* 1xdummy-Codec */ li->dais++; /* 1xCodec */ } dev_dbg(dev, "Count As DPCM\n"); return 0; } static void graph_get_dais_count(struct asoc_simple_priv *priv, struct link_info *li) { struct device *dev = simple_priv_to_dev(priv); /* * 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 * * ex4) * CPU0 --- Codec0 (convert-rate) link : 3 * CPU1 --- Codec1 dais : 4 * ccnf : 1 * * => 3 links = 1xCPU-Codec + 1xCPU-dummy + 1xdummy-Codec * => 4 DAIs = 2xCPU + 2xCodec * => 1 ccnf = 1xdummy-Codec */ graph_for_each_link(priv, li, graph_count_noml, graph_count_dpcm); dev_dbg(dev, "link %d, dais %d, ccnf %d\n", li->link, li->dais, li->conf); } static int graph_card_probe(struct snd_soc_card *card) { struct asoc_simple_priv *priv = snd_soc_card_get_drvdata(card); int ret; ret = asoc_simple_init_hp(card, &priv->hp_jack, NULL); if (ret < 0) return ret; ret = asoc_simple_init_mic(card, &priv->mic_jack, NULL); if (ret < 0) return ret; return 0; } static int graph_probe(struct platform_device *pdev) { struct asoc_simple_priv *priv; struct device *dev = &pdev->dev; struct snd_soc_card *card; struct link_info li; int ret; /* Allocate the private data and the DAI link array */ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; card = simple_priv_to_card(priv); card->owner = THIS_MODULE; card->dev = dev; card->dapm_widgets = graph_dapm_widgets; card->num_dapm_widgets = ARRAY_SIZE(graph_dapm_widgets); card->probe = graph_card_probe; memset(&li, 0, sizeof(li)); graph_get_dais_count(priv, &li); if (!li.link || !li.dais) return -EINVAL; ret = asoc_simple_init_priv(priv, &li); if (ret < 0) return ret; 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; } ret = graph_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); asoc_simple_debug_info(priv); ret = devm_snd_soc_register_card(dev, card); if (ret < 0) goto err; return 0; err: asoc_simple_clean_reference(card); return ret; } static int graph_remove(struct platform_device *pdev) { struct snd_soc_card *card = platform_get_drvdata(pdev); return asoc_simple_clean_reference(card); } static const struct of_device_id graph_of_match[] = { { .compatible = "audio-graph-card", }, { .compatible = "audio-graph-scu-card", .data = (void *)DPCM_SELECTABLE }, {}, }; MODULE_DEVICE_TABLE(of, graph_of_match); static struct platform_driver graph_card = { .driver = { .name = "asoc-audio-graph-card", .pm = &snd_soc_pm_ops, .of_match_table = graph_of_match, }, .probe = graph_probe, .remove = graph_remove, }; module_platform_driver(graph_card); MODULE_ALIAS("platform:asoc-audio-graph-card"); MODULE_LICENSE("GPL v2"); MODULE_DESCRIPTION("ASoC Audio Graph Sound Card"); MODULE_AUTHOR("Kuninori Morimoto ");