// SPDX-License-Identifier: GPL-2.0 // // ASoC simple sound card support // // Copyright (C) 2012 Renesas Solutions Corp. // Kuninori Morimoto #include #include #include #include #include #include #include #include #include #include #define DPCM_SELECTABLE 1 #define DAI "sound-dai" #define CELL "#sound-dai-cells" #define PREFIX "simple-audio-card," static const struct snd_soc_ops simple_ops = { .startup = asoc_simple_startup, .shutdown = asoc_simple_shutdown, .hw_params = asoc_simple_hw_params, }; static int asoc_simple_parse_dai(struct device_node *node, struct snd_soc_dai_link_component *dlc, int *is_single_link) { struct of_phandle_args args; int ret; if (!node) return 0; /* * Get node via "sound-dai = <&phandle port>" * it will be used as xxx_of_node on soc_bind_dai_link() */ ret = of_parse_phandle_with_args(node, DAI, CELL, 0, &args); if (ret) return ret; /* * 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_of_get_dai_name(node, &dlc->dai_name); if (ret < 0) return ret; dlc->of_node = args.np; if (is_single_link) *is_single_link = !args.args_count; return 0; } static void simple_parse_convert(struct device *dev, struct device_node *np, struct asoc_simple_data *adata) { struct device_node *top = dev->of_node; struct device_node *node = of_get_parent(np); asoc_simple_parse_convert(top, PREFIX, adata); asoc_simple_parse_convert(node, PREFIX, adata); asoc_simple_parse_convert(node, NULL, adata); asoc_simple_parse_convert(np, NULL, adata); of_node_put(node); } static void simple_parse_mclk_fs(struct device_node *top, struct device_node *cpu, struct device_node *codec, struct simple_dai_props *props, char *prefix) { struct device_node *node = of_get_parent(cpu); char prop[128]; snprintf(prop, sizeof(prop), "%smclk-fs", PREFIX); of_property_read_u32(top, prop, &props->mclk_fs); snprintf(prop, sizeof(prop), "%smclk-fs", prefix); of_property_read_u32(node, prop, &props->mclk_fs); of_property_read_u32(cpu, prop, &props->mclk_fs); of_property_read_u32(codec, prop, &props->mclk_fs); of_node_put(node); } static int simple_dai_link_of_dpcm(struct asoc_simple_priv *priv, struct device_node *np, struct device_node *codec, struct link_info *li, bool is_top) { 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 asoc_simple_dai *dai; struct snd_soc_dai_link_component *cpus = asoc_link_to_cpu(dai_link, 0); struct snd_soc_dai_link_component *codecs = asoc_link_to_codec(dai_link, 0); struct snd_soc_dai_link_component *platforms = asoc_link_to_platform(dai_link, 0); struct device_node *top = dev->of_node; struct device_node *node = of_get_parent(np); char *prefix = ""; int ret; dev_dbg(dev, "link_of DPCM (%pOF)\n", np); li->link++; /* For single DAI link & old style of DT node */ if (is_top) prefix = PREFIX; if (li->cpu) { int is_single_links = 0; /* Codec is dummy */ /* FE settings */ dai_link->dynamic = 1; dai_link->dpcm_merged_format = 1; dai = simple_props_to_dai_cpu(dai_props, 0); ret = asoc_simple_parse_dai(np, cpus, &is_single_links); if (ret) goto out_put_node; ret = asoc_simple_parse_clk(dev, np, dai, cpus); 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; asoc_simple_canonicalize_cpu(cpus, is_single_links); asoc_simple_canonicalize_platform(platforms, cpus); } else { struct snd_soc_codec_conf *cconf; /* CPU is dummy */ /* BE settings */ dai_link->no_pcm = 1; dai_link->be_hw_params_fixup = asoc_simple_be_hw_params_fixup; dai = simple_props_to_dai_codec(dai_props, 0); cconf = simple_props_to_codec_conf(dai_props, 0); ret = asoc_simple_parse_dai(np, codecs, NULL); if (ret < 0) goto out_put_node; ret = asoc_simple_parse_clk(dev, np, dai, codecs); 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 "prefix"); snd_soc_of_parse_node_prefix(node, cconf, codecs->of_node, "prefix"); snd_soc_of_parse_node_prefix(np, cconf, codecs->of_node, "prefix"); } simple_parse_convert(dev, np, &dai_props->adata); simple_parse_mclk_fs(top, np, codec, dai_props, prefix); ret = asoc_simple_parse_tdm(np, dai); if (ret) goto out_put_node; ret = asoc_simple_parse_daifmt(dev, node, codec, prefix, &dai_link->dai_fmt); if (ret < 0) goto out_put_node; snd_soc_dai_link_set_capabilities(dai_link); dai_link->ops = &simple_ops; dai_link->init = asoc_simple_dai_init; out_put_node: of_node_put(node); return ret; } static int simple_dai_link_of(struct asoc_simple_priv *priv, struct device_node *np, struct device_node *codec, struct link_info *li, bool is_top) { 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 asoc_simple_dai *cpu_dai = simple_props_to_dai_cpu(dai_props, 0); struct asoc_simple_dai *codec_dai = simple_props_to_dai_codec(dai_props, 0); struct snd_soc_dai_link_component *cpus = asoc_link_to_cpu(dai_link, 0); struct snd_soc_dai_link_component *codecs = asoc_link_to_codec(dai_link, 0); struct snd_soc_dai_link_component *platforms = asoc_link_to_platform(dai_link, 0); struct device_node *top = dev->of_node; struct device_node *cpu = NULL; struct device_node *node = NULL; struct device_node *plat = NULL; char prop[128]; char *prefix = ""; int ret, single_cpu = 0; cpu = np; node = of_get_parent(np); li->link++; dev_dbg(dev, "link_of (%pOF)\n", node); /* For single DAI link & old style of DT node */ if (is_top) prefix = PREFIX; snprintf(prop, sizeof(prop), "%splat", prefix); plat = of_get_child_by_name(node, prop); ret = asoc_simple_parse_daifmt(dev, node, codec, prefix, &dai_link->dai_fmt); if (ret < 0) goto dai_link_of_err; simple_parse_mclk_fs(top, cpu, codec, dai_props, prefix); ret = asoc_simple_parse_dai(cpu, cpus, &single_cpu); if (ret < 0) goto dai_link_of_err; ret = asoc_simple_parse_dai(codec, codecs, NULL); if (ret < 0) goto dai_link_of_err; ret = asoc_simple_parse_dai(plat, platforms, NULL); if (ret < 0) goto dai_link_of_err; ret = asoc_simple_parse_tdm(cpu, cpu_dai); if (ret < 0) goto dai_link_of_err; ret = asoc_simple_parse_tdm(codec, codec_dai); if (ret < 0) goto dai_link_of_err; ret = asoc_simple_parse_clk(dev, cpu, cpu_dai, cpus); if (ret < 0) goto dai_link_of_err; ret = asoc_simple_parse_clk(dev, codec, codec_dai, codecs); if (ret < 0) goto dai_link_of_err; ret = asoc_simple_set_dailink_name(dev, dai_link, "%s-%s", cpus->dai_name, codecs->dai_name); if (ret < 0) goto dai_link_of_err; dai_link->ops = &simple_ops; dai_link->init = asoc_simple_dai_init; asoc_simple_canonicalize_cpu(cpus, single_cpu); asoc_simple_canonicalize_platform(platforms, cpus); dai_link_of_err: of_node_put(plat); of_node_put(node); return ret; } static int __simple_for_each_link(struct asoc_simple_priv *priv, struct link_info *li, int (*func_noml)(struct asoc_simple_priv *priv, struct device_node *np, struct device_node *codec, struct link_info *li, bool is_top), int (*func_dpcm)(struct asoc_simple_priv *priv, struct device_node *np, struct device_node *codec, struct link_info *li, bool is_top)) { struct device *dev = simple_priv_to_dev(priv); struct device_node *top = dev->of_node; struct device_node *node; uintptr_t dpcm_selectable = (uintptr_t)of_device_get_match_data(dev); bool is_top = 0; int ret = 0; /* Check if it has dai-link */ node = of_get_child_by_name(top, PREFIX "dai-link"); if (!node) { node = of_node_get(top); is_top = 1; } /* loop for all dai-link */ do { struct asoc_simple_data adata; struct device_node *codec; struct device_node *plat; struct device_node *np; int num = of_get_child_count(node); /* get codec */ codec = of_get_child_by_name(node, is_top ? PREFIX "codec" : "codec"); if (!codec) { ret = -ENODEV; goto error; } /* get platform */ plat = of_get_child_by_name(node, is_top ? PREFIX "plat" : "plat"); /* get convert-xxx property */ memset(&adata, 0, sizeof(adata)); for_each_child_of_node(node, np) simple_parse_convert(dev, np, &adata); /* loop for all CPU/Codec node */ for_each_child_of_node(node, np) { if (plat == np) continue; /* * It is DPCM * if it has many CPUs, * or has convert-xxx property */ if (dpcm_selectable && (num > 2 || adata.convert_rate || adata.convert_channels)) { /* * np * |1(CPU)|0(Codec) li->cpu * CPU |Pass |return * Codec |return|Pass */ if (li->cpu != (np == codec)) ret = func_dpcm(priv, np, codec, li, is_top); /* else normal sound */ } else { /* * np * |1(CPU)|0(Codec) li->cpu * CPU |Pass |return * Codec |return|return */ if (li->cpu && (np != codec)) ret = func_noml(priv, np, codec, li, is_top); } if (ret < 0) { of_node_put(codec); of_node_put(np); goto error; } } of_node_put(codec); node = of_get_next_child(top, node); } while (!is_top && node); error: of_node_put(node); return ret; } static int simple_for_each_link(struct asoc_simple_priv *priv, struct link_info *li, int (*func_noml)(struct asoc_simple_priv *priv, struct device_node *np, struct device_node *codec, struct link_info *li, bool is_top), int (*func_dpcm)(struct asoc_simple_priv *priv, struct device_node *np, struct device_node *codec, struct link_info *li, bool is_top)) { int ret; /* * 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; */ for (li->cpu = 1; li->cpu >= 0; li->cpu--) { ret = __simple_for_each_link(priv, li, func_noml, func_dpcm); if (ret < 0) break; } return ret; } static int simple_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, PREFIX); if (ret < 0) return ret; ret = asoc_simple_parse_routing(card, PREFIX); if (ret < 0) return ret; ret = asoc_simple_parse_pin_switches(card, PREFIX); if (ret < 0) return ret; /* Single/Muti DAI link(s) & New style of DT node */ memset(&li, 0, sizeof(li)); ret = simple_for_each_link(priv, &li, simple_dai_link_of, simple_dai_link_of_dpcm); if (ret < 0) return ret; ret = asoc_simple_parse_card_name(card, PREFIX); if (ret < 0) return ret; ret = snd_soc_of_parse_aux_devs(card, PREFIX "aux-devs"); return ret; } static int simple_count_noml(struct asoc_simple_priv *priv, struct device_node *np, struct device_node *codec, struct link_info *li, bool is_top) { if (li->link >= SNDRV_MINOR_DEVICES) { struct device *dev = simple_priv_to_dev(priv); dev_err(dev, "too many links\n"); return -EINVAL; } li->num[li->link].cpus = 1; li->num[li->link].codecs = 1; li->num[li->link].platforms = 1; li->link += 1; return 0; } static int simple_count_dpcm(struct asoc_simple_priv *priv, struct device_node *np, struct device_node *codec, struct link_info *li, bool is_top) { if (li->link >= SNDRV_MINOR_DEVICES) { struct device *dev = simple_priv_to_dev(priv); dev_err(dev, "too many links\n"); return -EINVAL; } if (li->cpu) { li->num[li->link].cpus = 1; li->num[li->link].platforms = 1; li->link++; /* CPU-dummy */ } else { li->num[li->link].codecs = 1; li->link++; /* dummy-Codec */ } return 0; } static void simple_get_dais_count(struct asoc_simple_priv *priv, struct link_info *li) { struct device *dev = simple_priv_to_dev(priv); struct device_node *top = dev->of_node; /* * 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 */ if (!top) { li->num[0].cpus = 1; li->num[0].codecs = 1; li->num[0].platforms = 1; li->link = 1; return; } simple_for_each_link(priv, li, simple_count_noml, simple_count_dpcm); } static int simple_soc_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, PREFIX); if (ret < 0) return ret; ret = asoc_simple_init_mic(card, &priv->mic_jack, PREFIX); if (ret < 0) return ret; return 0; } static int asoc_simple_probe(struct platform_device *pdev) { struct asoc_simple_priv *priv; struct device *dev = &pdev->dev; struct device_node *np = dev->of_node; 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->probe = simple_soc_probe; memset(&li, 0, sizeof(li)); simple_get_dais_count(priv, &li); if (!li.link) return -EINVAL; ret = asoc_simple_init_priv(priv, &li); if (ret < 0) return ret; if (np && of_device_is_available(np)) { ret = simple_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 *cpus; struct snd_soc_dai_link_component *codecs; struct snd_soc_dai_link_component *platform; struct snd_soc_dai_link *dai_link = priv->dai_link; struct simple_dai_props *dai_props = priv->dai_props; 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; } cpus = dai_link->cpus; cpus->dai_name = cinfo->cpu_dai.name; codecs = dai_link->codecs; codecs->name = cinfo->codec; codecs->dai_name = cinfo->codec_dai.name; platform = dai_link->platforms; 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->dai_fmt = cinfo->daifmt; dai_link->init = asoc_simple_dai_init; memcpy(dai_props->cpu_dai, &cinfo->cpu_dai, sizeof(*dai_props->cpu_dai)); memcpy(dai_props->codec_dai, &cinfo->codec_dai, sizeof(*dai_props->codec_dai)); } 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 asoc_simple_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 simple_of_match[] = { { .compatible = "simple-audio-card", }, { .compatible = "simple-scu-audio-card", .data = (void *)DPCM_SELECTABLE }, {}, }; MODULE_DEVICE_TABLE(of, simple_of_match); static struct platform_driver asoc_simple_card = { .driver = { .name = "asoc-simple-card", .pm = &snd_soc_pm_ops, .of_match_table = simple_of_match, }, .probe = asoc_simple_probe, .remove = asoc_simple_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 ");