diff options
Diffstat (limited to '')
| -rw-r--r-- | sound/soc/generic/simple-card.c | 723 |
1 files changed, 723 insertions, 0 deletions
diff --git a/sound/soc/generic/simple-card.c b/sound/soc/generic/simple-card.c new file mode 100644 index 000000000..8723d540a --- /dev/null +++ b/sound/soc/generic/simple-card.c @@ -0,0 +1,723 @@ +// 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/of_device.h> +#include <linux/platform_device.h> +#include <linux/string.h> +#include <sound/simple_card.h> +#include <sound/soc-dai.h> +#include <sound/soc.h> + +#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(dev, top, PREFIX, adata); + asoc_simple_parse_convert(dev, node, PREFIX, adata); + asoc_simple_parse_convert(dev, node, NULL, adata); + asoc_simple_parse_convert(dev, 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 = dai_link->cpus; + struct snd_soc_dai_link_component *codecs = dai_link->codecs; + struct device_node *top = dev->of_node; + struct device_node *node = of_get_parent(np); + char *prefix = ""; + int ret; + + /* + * |CPU |Codec : turn + * CPU |Pass |return + * Codec |return|Pass + * np + */ + if (li->cpu == (np == codec)) + return 0; + + 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 */ + 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(np, dai_link, &is_single_links); + if (ret) + goto out_put_node; + + ret = asoc_simple_parse_clk_cpu(dev, np, 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; + + asoc_simple_canonicalize_cpu(dai_link, is_single_links); + } else { + struct snd_soc_codec_conf *cconf; + + /* CPU 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(np, dai_link); + if (ret < 0) + goto out_put_node; + + ret = asoc_simple_parse_clk_codec(dev, np, 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 "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); + + asoc_simple_canonicalize_platform(dai_link); + + 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; + struct asoc_simple_dai *codec_dai; + 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 |Codec : turn + * CPU |Pass |return + * Codec |return|return + * np + */ + if (!li->cpu || np == codec) + return 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); + + cpu_dai = + dai_props->cpu_dai = &priv->dais[li->dais++]; + codec_dai = + dai_props->codec_dai = &priv->dais[li->dais++]; + + 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_cpu(cpu, dai_link, &single_cpu); + if (ret < 0) + goto dai_link_of_err; + + ret = asoc_simple_parse_codec(codec, dai_link); + if (ret < 0) + goto dai_link_of_err; + + ret = asoc_simple_parse_platform(plat, dai_link); + 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_cpu(dev, cpu, dai_link, cpu_dai); + if (ret < 0) + goto dai_link_of_err; + + ret = asoc_simple_parse_clk_codec(dev, codec, dai_link, codec_dai); + if (ret < 0) + goto dai_link_of_err; + + ret = asoc_simple_set_dailink_name(dev, dai_link, + "%s-%s", + dai_link->cpus->dai_name, + dai_link->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(dai_link, single_cpu); + asoc_simple_canonicalize_platform(dai_link); + +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)) + ret = func_dpcm(priv, np, codec, li, is_top); + /* else normal sound */ + else + ret = func_noml(priv, np, codec, li, is_top); + + if (ret < 0) { + of_node_put(codec); + of_node_put(plat); + 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_parse_of(struct asoc_simple_priv *priv) +{ + struct device *dev = simple_priv_to_dev(priv); + struct device_node *top = dev->of_node; + struct snd_soc_card *card = simple_priv_to_card(priv); + struct link_info li; + int ret; + + if (!top) + return -EINVAL; + + 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)); + 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 = 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) +{ + li->dais++; /* CPU or Codec */ + if (np != codec) + li->link++; /* CPU-Codec */ + + 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) +{ + li->dais++; /* CPU or Codec */ + li->link++; /* CPU-dummy or dummy-Codec */ + if (np == codec) + li->conf++; + + 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->link = 1; + li->dais = 2; + li->conf = 0; + return; + } + + simple_for_each_link(priv, li, + simple_count_noml, + simple_count_dpcm); + + dev_dbg(dev, "link %d, dais %d, ccnf %d\n", + li->link, li->dais, li->conf); +} + +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 || !li.dais) + 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; + + int dai_idx = 0; + + ret = -EINVAL; + + cinfo = dev->platform_data; + if (!cinfo) { + dev_err(dev, "no info for asoc-simple-card\n"); + goto err; + } + + 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"); + goto err; + } + + dai_props->cpu_dai = &priv->dais[dai_idx++]; + dai_props->codec_dai = &priv->dais[dai_idx++]; + + 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 <kuninori.morimoto.gx@renesas.com>"); |