diff options
Diffstat (limited to 'sound/soc/generic/audio-graph-card.c')
| -rw-r--r-- | sound/soc/generic/audio-graph-card.c | 661 |
1 files changed, 661 insertions, 0 deletions
diff --git a/sound/soc/generic/audio-graph-card.c b/sound/soc/generic/audio-graph-card.c new file mode 100644 index 000000000000..7720cf1fd6e1 --- /dev/null +++ b/sound/soc/generic/audio-graph-card.c @@ -0,0 +1,661 @@ +// 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/cleanup.h> +#include <linux/clk.h> +#include <linux/device.h> +#include <linux/gpio/consumer.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_graph.h> +#include <linux/platform_device.h> +#include <linux/string.h> +#include <sound/graph_card.h> + +#define DPCM_SELECTABLE 1 + +#define graph_ret(priv, ret) _graph_ret(priv, __func__, ret) +static inline int _graph_ret(struct simple_util_priv *priv, + const char *func, int ret) +{ + return snd_soc_ret(simple_priv_to_dev(priv), ret, "at %s()\n", func); +} + +#define ep_to_port(ep) of_get_parent(ep) +static struct device_node *port_to_ports(struct device_node *port) +{ + struct device_node *ports = of_get_parent(port); + + if (!of_node_name_eq(ports, "ports")) { + of_node_put(ports); + return NULL; + } + return ports; +} + +static int graph_outdrv_event(struct snd_soc_dapm_widget *w, + struct snd_kcontrol *kcontrol, + int event) +{ + struct snd_soc_card *card = snd_soc_dapm_to_card(w->dapm); + struct simple_util_priv *priv = snd_soc_card_get_drvdata(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 = simple_util_startup, + .shutdown = simple_util_shutdown, + .hw_params = simple_util_hw_params, +}; + +static bool soc_component_is_pcm(struct snd_soc_dai_link_component *dlc) +{ + struct snd_soc_dai *dai = snd_soc_find_dai_with_mutex(dlc); + + if (dai && (dai->component->driver->pcm_construct || + (dai->driver->ops && dai->driver->ops->pcm_new))) + return true; + + return false; +} + +static void graph_parse_convert(struct device *dev, + struct device_node *ep, + struct simple_util_data *adata) +{ + struct device_node *top = dev->of_node; + struct device_node *port __free(device_node) = ep_to_port(ep); + struct device_node *ports __free(device_node) = port_to_ports(port); + struct device_node *node __free(device_node) = of_graph_get_port_parent(ep); + + simple_util_parse_convert(top, NULL, adata); + simple_util_parse_convert(ports, NULL, adata); + simple_util_parse_convert(port, NULL, adata); + simple_util_parse_convert(ep, NULL, adata); +} + +static int graph_parse_node(struct simple_util_priv *priv, + struct device_node *ep, + struct link_info *li, + int *cpu) +{ + 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 snd_soc_dai_link_component *dlc; + struct simple_util_dai *dai; + int ret; + + if (cpu) { + dlc = snd_soc_link_to_cpu(dai_link, 0); + dai = simple_props_to_dai_cpu(dai_props, 0); + } else { + dlc = snd_soc_link_to_codec(dai_link, 0); + dai = simple_props_to_dai_codec(dai_props, 0); + } + + ret = graph_util_parse_dai(priv, ep, dlc, cpu); + if (ret < 0) + goto end; + + ret = simple_util_parse_tdm(ep, dai); + if (ret < 0) + goto end; + + ret = simple_util_parse_clk(dev, ep, dai, dlc); +end: + return graph_ret(priv, ret); +} + +static int graph_link_init(struct simple_util_priv *priv, + struct device_node *ep_cpu, + struct device_node *ep_codec, + struct link_info *li, + char *name) +{ + struct device *dev = simple_priv_to_dev(priv); + struct device_node *top = dev->of_node; + 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 *port_cpu __free(device_node) = ep_to_port(ep_cpu); + struct device_node *port_codec __free(device_node) = ep_to_port(ep_codec); + struct device_node *ports_cpu __free(device_node) = port_to_ports(port_cpu); + struct device_node *ports_codec __free(device_node) = port_to_ports(port_codec); + enum snd_soc_trigger_order trigger_start = SND_SOC_TRIGGER_ORDER_DEFAULT; + enum snd_soc_trigger_order trigger_stop = SND_SOC_TRIGGER_ORDER_DEFAULT; + bool playback_only = 0, capture_only = 0; + int ret; + + ret = simple_util_parse_daifmt(dev, ep_cpu, ep_codec, + NULL, &dai_link->dai_fmt); + if (ret < 0) + goto end; + + graph_util_parse_link_direction(top, &playback_only, &capture_only); + graph_util_parse_link_direction(port_cpu, &playback_only, &capture_only); + graph_util_parse_link_direction(port_codec, &playback_only, &capture_only); + graph_util_parse_link_direction(ep_cpu, &playback_only, &capture_only); + graph_util_parse_link_direction(ep_codec, &playback_only, &capture_only); + + of_property_read_u32(top, "mclk-fs", &dai_props->mclk_fs); + of_property_read_u32(ports_cpu, "mclk-fs", &dai_props->mclk_fs); + of_property_read_u32(ports_codec, "mclk-fs", &dai_props->mclk_fs); + of_property_read_u32(port_cpu, "mclk-fs", &dai_props->mclk_fs); + of_property_read_u32(port_codec, "mclk-fs", &dai_props->mclk_fs); + of_property_read_u32(ep_cpu, "mclk-fs", &dai_props->mclk_fs); + of_property_read_u32(ep_codec, "mclk-fs", &dai_props->mclk_fs); + + graph_util_parse_trigger_order(priv, top, &trigger_start, &trigger_stop); + graph_util_parse_trigger_order(priv, ports_cpu, &trigger_start, &trigger_stop); + graph_util_parse_trigger_order(priv, ports_codec, &trigger_start, &trigger_stop); + graph_util_parse_trigger_order(priv, port_cpu, &trigger_start, &trigger_stop); + graph_util_parse_trigger_order(priv, port_cpu, &trigger_start, &trigger_stop); + graph_util_parse_trigger_order(priv, ep_cpu, &trigger_start, &trigger_stop); + graph_util_parse_trigger_order(priv, ep_codec, &trigger_start, &trigger_stop); + + dai_link->playback_only = playback_only; + dai_link->capture_only = capture_only; + + dai_link->trigger_start = trigger_start; + dai_link->trigger_stop = trigger_stop; + + dai_link->init = simple_util_dai_init; + dai_link->ops = &graph_ops; + if (priv->ops) + dai_link->ops = priv->ops; + + ret = simple_util_set_dailink_name(priv, dai_link, name); +end: + return graph_ret(priv, ret); +} + +static int graph_dai_link_of_dpcm(struct simple_util_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 device_node *ep = li->cpu ? cpu_ep : codec_ep; + char dai_name[64]; + int ret; + + dev_dbg(dev, "link_of DPCM (%pOF)\n", ep); + + if (li->cpu) { + struct snd_soc_card *card = simple_priv_to_card(priv); + struct snd_soc_dai_link_component *cpus = snd_soc_link_to_cpu(dai_link, 0); + struct snd_soc_dai_link_component *platforms = snd_soc_link_to_platform(dai_link, 0); + int is_single_links = 0; + + /* Codec is dummy */ + + /* FE settings */ + dai_link->dynamic = 1; + dai_link->dpcm_merged_format = 1; + + ret = graph_parse_node(priv, cpu_ep, li, &is_single_links); + if (ret) + goto end; + + snprintf(dai_name, sizeof(dai_name), + "fe.%pOFP.%s", cpus->of_node, cpus->dai_name); + /* + * In BE<->BE connections it is not required to create + * PCM devices at CPU end of the dai link and thus 'no_pcm' + * flag needs to be set. It is useful when there are many + * BE components and some of these have to be connected to + * form a valid audio path. + * + * For example: FE <-> BE1 <-> BE2 <-> ... <-> BEn where + * there are 'n' BE components in the path. + */ + if (card->component_chaining && !soc_component_is_pcm(cpus)) { + dai_link->no_pcm = 1; + dai_link->be_hw_params_fixup = simple_util_be_hw_params_fixup; + } + + simple_util_canonicalize_cpu(cpus, is_single_links); + simple_util_canonicalize_platform(platforms, cpus); + } else { + struct snd_soc_codec_conf *cconf = simple_props_to_codec_conf(dai_props, 0); + struct snd_soc_dai_link_component *codecs = snd_soc_link_to_codec(dai_link, 0); + + /* CPU is dummy */ + + /* BE settings */ + dai_link->no_pcm = 1; + dai_link->be_hw_params_fixup = simple_util_be_hw_params_fixup; + + ret = graph_parse_node(priv, codec_ep, li, NULL); + if (ret < 0) + goto end; + + snprintf(dai_name, sizeof(dai_name), + "be.%pOFP.%s", codecs->of_node, codecs->dai_name); + + /* check "prefix" from top node */ + struct device_node *port __free(device_node) = ep_to_port(ep); + struct device_node *ports __free(device_node) = port_to_ports(port); + + snd_soc_of_parse_node_prefix(top, cconf, codecs->of_node, "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); + + ret = graph_link_init(priv, cpu_ep, codec_ep, li, dai_name); + + li->link++; +end: + return graph_ret(priv, ret); +} + +static int graph_dai_link_of(struct simple_util_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 snd_soc_dai_link_component *cpus = snd_soc_link_to_cpu(dai_link, 0); + struct snd_soc_dai_link_component *codecs = snd_soc_link_to_codec(dai_link, 0); + struct snd_soc_dai_link_component *platforms = snd_soc_link_to_platform(dai_link, 0); + char dai_name[64]; + int ret, is_single_links = 0; + + dev_dbg(dev, "link_of (%pOF)\n", cpu_ep); + + ret = graph_parse_node(priv, cpu_ep, li, &is_single_links); + if (ret < 0) + goto end; + + ret = graph_parse_node(priv, codec_ep, li, NULL); + if (ret < 0) + goto end; + + snprintf(dai_name, sizeof(dai_name), + "%s-%s", cpus->dai_name, codecs->dai_name); + + simple_util_canonicalize_cpu(cpus, is_single_links); + simple_util_canonicalize_platform(platforms, cpus); + + ret = graph_link_init(priv, cpu_ep, codec_ep, li, dai_name); + if (ret < 0) + goto end; + + li->link++; +end: + return graph_ret(priv, ret); +} + +static inline bool parse_as_dpcm_link(struct simple_util_priv *priv, + struct device_node *codec_port, + struct simple_util_data *adata) +{ + if (priv->force_dpcm) + return true; + + if (!priv->dpcm_selectable) + return false; + + /* + * It is DPCM + * if Codec port has many endpoints, + * or has convert-xxx property + */ + if ((of_get_child_count(codec_port) > 1) || + simple_util_is_convert_required(adata)) + return true; + + return false; +} + +static int __graph_for_each_link(struct simple_util_priv *priv, + struct link_info *li, + int (*func_noml)(struct simple_util_priv *priv, + struct device_node *cpu_ep, + struct device_node *codec_ep, + struct link_info *li), + int (*func_dpcm)(struct simple_util_priv *priv, + struct device_node *cpu_ep, + struct device_node *codec_ep, + struct link_info *li)) +{ + 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 *codec_port_old = NULL; + struct simple_util_data adata; + int rc, ret = 0; + + /* loop for all listed CPU port */ + of_for_each_phandle(&it, rc, node, "dais", NULL, 0) { + cpu_port = it.node; + + /* loop for all CPU endpoint */ + for_each_of_graph_port_endpoint(cpu_port, cpu_ep) { + /* get codec */ + struct device_node *codec_ep __free(device_node) = of_graph_get_remote_endpoint(cpu_ep); + struct device_node *codec_port __free(device_node) = ep_to_port(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); + + /* check if link requires DPCM parsing */ + if (parse_as_dpcm_link(priv, codec_port, &adata)) { + /* + * Codec endpoint can be NULL for pluggable audio HW. + * Platform DT can populate the Codec endpoint depending on the + * plugged HW. + */ + /* Do it all CPU endpoint, and 1st Codec endpoint */ + if (li->cpu || + ((codec_port_old != codec_port) && codec_ep)) + ret = func_dpcm(priv, cpu_ep, codec_ep, li); + /* else normal sound */ + } else { + if (li->cpu) + ret = func_noml(priv, cpu_ep, codec_ep, li); + } + + if (ret < 0) + goto end; + + codec_port_old = codec_port; + } + } +end: + return graph_ret(priv, ret); +} + +static int graph_for_each_link(struct simple_util_priv *priv, + struct link_info *li, + int (*func_noml)(struct simple_util_priv *priv, + struct device_node *cpu_ep, + struct device_node *codec_ep, + struct link_info *li), + int (*func_dpcm)(struct simple_util_priv *priv, + struct device_node *cpu_ep, + struct device_node *codec_ep, + struct link_info *li)) +{ + 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 = __graph_for_each_link(priv, li, func_noml, func_dpcm); + if (ret < 0) + break; + } + + return graph_ret(priv, ret); +} + +static int graph_count_noml(struct simple_util_priv *priv, + struct device_node *cpu_ep, + struct device_node *codec_ep, + struct link_info *li) +{ + struct device *dev = simple_priv_to_dev(priv); + int ret = -EINVAL; + + if (li->link >= SNDRV_MAX_LINKS) + goto end; + + /* + * DON'T REMOVE platforms + * see + * simple-card.c :: simple_count_noml() + */ + li->num[li->link].cpus = 1; + li->num[li->link].platforms = 1; + + li->num[li->link].codecs = 1; + + li->link += 1; /* 1xCPU-Codec */ + + dev_dbg(dev, "Count As Normal\n"); + ret = 0; +end: + return graph_ret(priv, ret); +} + +static int graph_count_dpcm(struct simple_util_priv *priv, + struct device_node *cpu_ep, + struct device_node *codec_ep, + struct link_info *li) +{ + struct device *dev = simple_priv_to_dev(priv); + int ret = -EINVAL; + + if (li->link >= SNDRV_MAX_LINKS) + goto end; + + if (li->cpu) { + /* + * DON'T REMOVE platforms + * see + * simple-card.c :: simple_count_noml() + */ + li->num[li->link].cpus = 1; + li->num[li->link].platforms = 1; + + li->link++; /* 1xCPU-dummy */ + } else { + li->num[li->link].codecs = 1; + + li->link++; /* 1xdummy-Codec */ + } + + dev_dbg(dev, "Count As DPCM\n"); + ret = 0; +end: + return graph_ret(priv, ret); +} + +static int graph_get_dais_count(struct simple_util_priv *priv, + struct link_info *li) +{ + /* + * 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 + */ + return graph_for_each_link(priv, li, + graph_count_noml, + graph_count_dpcm); +} + +int audio_graph_parse_of(struct simple_util_priv *priv, struct device *dev) +{ + struct snd_soc_card *card = simple_priv_to_card(priv); + int ret = -ENOMEM; + + struct link_info *li __free(kfree) = kzalloc(sizeof(*li), GFP_KERNEL); + if (!li) + goto end; + + card->owner = THIS_MODULE; + card->dev = dev; + + ret = graph_get_dais_count(priv, li); + if (ret < 0) + goto end; + + ret = -EINVAL; + if (!li->link) + goto end; + + ret = simple_util_init_priv(priv, li); + if (ret < 0) + goto end; + + 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); + goto end; + } + + ret = simple_util_parse_widgets(card, NULL); + if (ret < 0) + goto end; + + ret = simple_util_parse_routing(card, NULL); + if (ret < 0) + goto end; + + memset(li, 0, sizeof(*li)); + ret = graph_for_each_link(priv, li, + graph_dai_link_of, + graph_dai_link_of_dpcm); + if (ret < 0) + goto err; + + ret = simple_util_parse_card_name(priv, NULL); + if (ret < 0) + goto err; + + snd_soc_card_set_drvdata(card, priv); + + simple_util_debug_info(priv); + + ret = devm_snd_soc_register_card(dev, card); + if (ret < 0) + goto err; + + return 0; +err: + simple_util_clean_reference(card); +end: + return dev_err_probe(dev, ret, "parse error\n"); +} +EXPORT_SYMBOL_GPL(audio_graph_parse_of); + +static int graph_probe(struct platform_device *pdev) +{ + struct simple_util_priv *priv; + struct device *dev = &pdev->dev; + struct snd_soc_card *card; + + /* 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->dapm_widgets = graph_dapm_widgets; + card->num_dapm_widgets = ARRAY_SIZE(graph_dapm_widgets); + card->probe = graph_util_card_probe; + + if (of_device_get_match_data(dev)) + priv->dpcm_selectable = 1; + + return audio_graph_parse_of(priv, dev); +} + +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 = simple_util_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 <kuninori.morimoto.gx@renesas.com>"); |