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-rw-r--r--sound/soc/generic/audio-graph-card.c656
1 files changed, 656 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 000000000..844a2ef15
--- /dev/null
+++ b/sound/soc/generic/audio-graph-card.c
@@ -0,0 +1,656 @@
+// 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/graph_card.h>
+
+#define DPCM_SELECTABLE 1
+
+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 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 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(top, NULL, adata);
+ if (of_node_name_eq(ports, "ports"))
+ asoc_simple_parse_convert(ports, NULL, adata);
+ asoc_simple_parse_convert(port, NULL, adata);
+ asoc_simple_parse_convert(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);
+
+ of_property_read_u32(top, "mclk-fs", &props->mclk_fs);
+ if (of_node_name_eq(ports, "ports"))
+ 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);
+}
+
+static int graph_parse_node(struct asoc_simple_priv *priv,
+ struct device_node *ep,
+ struct link_info *li,
+ int *cpu)
+{
+ 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 snd_soc_dai_link_component *dlc;
+ struct asoc_simple_dai *dai;
+ int ret;
+
+ if (cpu) {
+ dlc = asoc_link_to_cpu(dai_link, 0);
+ dai = simple_props_to_dai_cpu(dai_props, 0);
+ } else {
+ dlc = asoc_link_to_codec(dai_link, 0);
+ dai = simple_props_to_dai_codec(dai_props, 0);
+ }
+
+ graph_parse_mclk_fs(top, ep, dai_props);
+
+ ret = asoc_graph_parse_dai(dev, ep, dlc, cpu);
+ if (ret < 0)
+ return ret;
+
+ ret = asoc_simple_parse_tdm(ep, dai);
+ if (ret < 0)
+ return ret;
+
+ ret = asoc_simple_parse_clk(dev, ep, dai, dlc);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static int graph_link_init(struct asoc_simple_priv *priv,
+ struct device_node *cpu_ep,
+ struct device_node *codec_ep,
+ struct link_info *li,
+ char *name)
+{
+ struct device *dev = simple_priv_to_dev(priv);
+ struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link);
+ int ret;
+
+ ret = asoc_simple_parse_daifmt(dev, cpu_ep, codec_ep,
+ NULL, &dai_link->dai_fmt);
+ if (ret < 0)
+ return ret;
+
+ dai_link->init = asoc_simple_dai_init;
+ dai_link->ops = &graph_ops;
+ if (priv->ops)
+ dai_link->ops = priv->ops;
+
+ return asoc_simple_set_dailink_name(dev, dai_link, name);
+}
+
+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)
+{
+ 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 = asoc_link_to_cpu(dai_link, 0);
+ struct snd_soc_dai_link_component *platforms = asoc_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)
+ return ret;
+
+ 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 = asoc_simple_be_hw_params_fixup;
+ }
+
+ asoc_simple_canonicalize_cpu(cpus, is_single_links);
+ asoc_simple_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 = asoc_link_to_codec(dai_link, 0);
+ struct device_node *port;
+ struct device_node *ports;
+
+ /* CPU is dummy */
+
+ /* BE settings */
+ dai_link->no_pcm = 1;
+ dai_link->be_hw_params_fixup = asoc_simple_be_hw_params_fixup;
+
+ ret = graph_parse_node(priv, codec_ep, li, NULL);
+ if (ret < 0)
+ return ret;
+
+ snprintf(dai_name, sizeof(dai_name),
+ "be.%pOFP.%s", codecs->of_node, codecs->dai_name);
+
+ /* check "prefix" from top node */
+ port = of_get_parent(ep);
+ ports = of_get_parent(port);
+ snd_soc_of_parse_node_prefix(top, cconf, codecs->of_node,
+ "prefix");
+ if (of_node_name_eq(ports, "ports"))
+ snd_soc_of_parse_node_prefix(ports, cconf, codecs->of_node, "prefix");
+ snd_soc_of_parse_node_prefix(port, cconf, codecs->of_node,
+ "prefix");
+
+ of_node_put(ports);
+ of_node_put(port);
+ }
+
+ graph_parse_convert(dev, ep, &dai_props->adata);
+
+ snd_soc_dai_link_set_capabilities(dai_link);
+
+ ret = graph_link_init(priv, cpu_ep, codec_ep, li, dai_name);
+
+ li->link++;
+
+ 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 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);
+ 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)
+ return ret;
+
+ ret = graph_parse_node(priv, codec_ep, li, NULL);
+ if (ret < 0)
+ return ret;
+
+ snprintf(dai_name, sizeof(dai_name),
+ "%s-%s", cpus->dai_name, codecs->dai_name);
+
+ asoc_simple_canonicalize_cpu(cpus, is_single_links);
+ asoc_simple_canonicalize_platform(platforms, cpus);
+
+ ret = graph_link_init(priv, cpu_ep, codec_ep, li, dai_name);
+ if (ret < 0)
+ return ret;
+
+ li->link++;
+
+ return 0;
+}
+
+static inline bool parse_as_dpcm_link(struct asoc_simple_priv *priv,
+ struct device_node *codec_port,
+ struct asoc_simple_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) ||
+ asoc_simple_is_convert_required(adata))
+ return true;
+
+ return false;
+}
+
+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))
+{
+ 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;
+ int rc, ret = 0;
+
+ /* 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);
+
+ /* 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);
+ }
+
+ of_node_put(codec_ep);
+ of_node_put(codec_port);
+
+ if (ret < 0) {
+ of_node_put(cpu_ep);
+ return ret;
+ }
+
+ codec_port_old = codec_port;
+ }
+ }
+
+ 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 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 ret;
+}
+
+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);
+
+ if (li->link >= SNDRV_MAX_LINKS) {
+ dev_err(dev, "too many links\n");
+ return -EINVAL;
+ }
+
+ /*
+ * 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");
+
+ 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)
+{
+ struct device *dev = simple_priv_to_dev(priv);
+
+ if (li->link >= SNDRV_MAX_LINKS) {
+ dev_err(dev, "too many links\n");
+ return -EINVAL;
+ }
+
+ 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");
+
+ return 0;
+}
+
+static int graph_get_dais_count(struct asoc_simple_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 asoc_simple_priv *priv, struct device *dev)
+{
+ struct snd_soc_card *card = simple_priv_to_card(priv);
+ struct link_info *li;
+ int ret;
+
+ li = devm_kzalloc(dev, sizeof(*li), GFP_KERNEL);
+ if (!li)
+ return -ENOMEM;
+
+ card->owner = THIS_MODULE;
+ card->dev = dev;
+
+ ret = graph_get_dais_count(priv, li);
+ if (ret < 0)
+ return ret;
+
+ if (!li->link)
+ 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 = 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));
+ ret = graph_for_each_link(priv, li,
+ graph_dai_link_of,
+ graph_dai_link_of_dpcm);
+ if (ret < 0)
+ goto err;
+
+ ret = asoc_simple_parse_card_name(card, NULL);
+ if (ret < 0)
+ 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;
+
+ devm_kfree(dev, li);
+ return 0;
+
+err:
+ asoc_simple_clean_reference(card);
+
+ 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 asoc_simple_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 = asoc_graph_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 = asoc_simple_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>");
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-12 20:14:27 +0000