[alsa-devel] [PATCH 1/2][RFC] ASoC: add simple-graph-card support
Kuninori Morimoto
kuninori.morimoto.gx at renesas.com
Fri May 27 09:01:09 CEST 2016
graph base DT binding are used on V4L2, and ALSA SoC is using different
style of DT. In case of simple case, ALSA SoC supports simple-card
driver.
Int the future, V4L2 / ALSA will support HDMI, and then, DT bindings
between V4L2 / ALSA should be merged somehow.
This patch adds graph base DT binding with simple-card style
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx at renesas.com>
---
sound/soc/generic/Kconfig | 6 +
sound/soc/generic/Makefile | 2 +
sound/soc/generic/simple-graph-card.c | 351 ++++++++++++++++++++++++++++++++++
3 files changed, 359 insertions(+)
create mode 100644 sound/soc/generic/simple-graph-card.c
diff --git a/sound/soc/generic/Kconfig b/sound/soc/generic/Kconfig
index fbba1e6..49554fd 100644
--- a/sound/soc/generic/Kconfig
+++ b/sound/soc/generic/Kconfig
@@ -12,3 +12,9 @@ config SND_SIMPLE_DPCM_CARD
select SND_SIMPLE_CARD_CORE
help
This option enables generic simple DPCM sound card support
+
+config SND_SIMPLE_GRAPH_CARD
+ tristate "ASoC Simple Graph sound card support"
+ select SND_SIMPLE_CARD_CORE
+ help
+ This option enables generic simple Graph sound card support
diff --git a/sound/soc/generic/Makefile b/sound/soc/generic/Makefile
index a5f0e4d..2f7d392 100644
--- a/sound/soc/generic/Makefile
+++ b/sound/soc/generic/Makefile
@@ -2,6 +2,8 @@ obj-$(CONFIG_SND_SIMPLE_CARD_CORE) := simple-card-core.o
snd-soc-simple-card-objs := simple-card.o
snd-soc-simple-dpcm-card-objs := simple-dpcm-card.o
+snd-soc-simple-graph-card-objs := simple-graph-card.o
obj-$(CONFIG_SND_SIMPLE_CARD) += snd-soc-simple-card.o
obj-$(CONFIG_SND_SIMPLE_DPCM_CARD) += snd-soc-simple-dpcm-card.o
+obj-$(CONFIG_SND_SIMPLE_GRAPH_CARD) += snd-soc-simple-graph-card.o
diff --git a/sound/soc/generic/simple-graph-card.c b/sound/soc/generic/simple-graph-card.c
new file mode 100644
index 0000000..ef1e90f
--- /dev/null
+++ b/sound/soc/generic/simple-graph-card.c
@@ -0,0 +1,351 @@
+/*
+ * ASoC simple graph sound card support
+ *
+ * Copyright (C) 2015 Renesas Solutions Corp.
+ * Kuninori Morimoto <kuninori.morimoto.gx at renesas.com>
+ *
+ * based on ${LINUX}/sound/soc/generic/simple-card.c
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/gpio.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_gpio.h>
+#include <linux/of_graph.h>
+#include <linux/platform_device.h>
+#include <linux/string.h>
+#include <sound/jack.h>
+#include <sound/simple_card.h>
+
+struct simple_card_data {
+ struct snd_soc_card snd_card;
+ struct simple_dai_props {
+ struct asoc_simple_dai cpu_dai;
+ struct asoc_simple_dai codec_dai;
+ unsigned int mclk_fs;
+ } *dai_props;
+ struct asoc_simple_jack hp_jack;
+ struct asoc_simple_jack mic_jack;
+ struct snd_soc_dai_link *dai_link;
+ unsigned int mclk_fs;
+};
+
+#define simple_priv_to_dev(priv) ((priv)->snd_card.dev)
+#define simple_priv_to_link(priv, i) ((priv)->snd_card.dai_link + i)
+#define simple_priv_to_props(priv, i) ((priv)->dai_props + i)
+
+#define DAI "remote-endpoint"
+#define PREFIX "simple-audio-card,"
+
+static int asoc_simple_card_startup(struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
+ struct simple_dai_props *dai_props =
+ &priv->dai_props[rtd->num];
+ int ret;
+
+ ret = clk_prepare_enable(dai_props->cpu_dai.clk);
+ if (ret)
+ return ret;
+
+ ret = clk_prepare_enable(dai_props->codec_dai.clk);
+ if (ret)
+ clk_disable_unprepare(dai_props->cpu_dai.clk);
+
+ return ret;
+}
+
+static void asoc_simple_card_shutdown(struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
+ struct simple_dai_props *dai_props =
+ &priv->dai_props[rtd->num];
+
+ clk_disable_unprepare(dai_props->cpu_dai.clk);
+
+ clk_disable_unprepare(dai_props->codec_dai.clk);
+}
+
+static int asoc_simple_card_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_dai *codec_dai = rtd->codec_dai;
+ struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+ struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
+ struct simple_dai_props *dai_props = &priv->dai_props[rtd->num];
+ unsigned int mclk, mclk_fs = 0;
+ int ret = 0;
+
+ if (priv->mclk_fs)
+ mclk_fs = priv->mclk_fs;
+ else if (dai_props->mclk_fs)
+ mclk_fs = dai_props->mclk_fs;
+
+ if (mclk_fs) {
+ mclk = params_rate(params) * mclk_fs;
+ ret = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
+ SND_SOC_CLOCK_IN);
+ if (ret && ret != -ENOTSUPP)
+ goto err;
+
+ ret = snd_soc_dai_set_sysclk(cpu_dai, 0, mclk,
+ SND_SOC_CLOCK_OUT);
+ if (ret && ret != -ENOTSUPP)
+ goto err;
+ }
+ return 0;
+err:
+ return ret;
+}
+
+static struct snd_soc_ops asoc_simple_card_ops = {
+ .startup = asoc_simple_card_startup,
+ .shutdown = asoc_simple_card_shutdown,
+ .hw_params = asoc_simple_card_hw_params,
+};
+
+static int asoc_simple_card_dai_init(struct snd_soc_pcm_runtime *rtd)
+{
+ struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
+ struct device *dev = simple_priv_to_dev(priv);
+ struct device *cpu_dev = dev->parent;
+ struct snd_soc_dai *codec = rtd->codec_dai;
+ struct snd_soc_dai *cpu = rtd->cpu_dai;
+ struct snd_soc_card *card = rtd->card;
+ struct simple_dai_props *dai_props = &priv->dai_props[rtd->num];
+ struct device_node *cpu_port = of_graph_get_top_port(cpu_dev);
+ int ret;
+
+ ret = asoc_simple_card_init_dai(codec, &dai_props->codec_dai);
+ if (ret < 0)
+ return ret;
+
+ ret = asoc_simple_card_init_dai(cpu, &dai_props->cpu_dai);
+ if (ret < 0)
+ return ret;
+
+ ret = asoc_simple_card_init_hp(card, cpu_port, &priv->hp_jack, PREFIX);
+ if (ret < 0)
+ return ret;
+
+ ret = asoc_simple_card_init_mic(card, cpu_port, &priv->hp_jack, PREFIX);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static int asoc_simple_card_dai_link_of(struct device_node *cpu_ep,
+ struct simple_card_data *priv,
+ int idx)
+{
+ struct device *dev = simple_priv_to_dev(priv);
+ struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, idx);
+ struct simple_dai_props *dai_props = simple_priv_to_props(priv, idx);
+ struct asoc_simple_dai *cpu_dai = &dai_props->cpu_dai;
+ struct asoc_simple_dai *codec_dai = &dai_props->codec_dai;
+ struct device_node *cpu_port;
+ struct device_node *codec_ep;
+ int ret, single_cpu;
+ u32 val;
+
+ cpu_ep = of_node_get(cpu_ep);
+ codec_ep = of_graph_get_remote_endpoint(cpu_ep);
+
+ if (cpu_ep != of_graph_get_remote_endpoint(codec_ep)) {
+ dev_err(dev, "endpoint parse error\n");
+ goto dai_link_of_err;
+ }
+
+ cpu_port = cpu_ep->parent;
+
+ ret = asoc_simple_card_parse_daifmt(dev, cpu_port, codec_ep,
+ PREFIX, &dai_link->dai_fmt);
+ if (ret < 0)
+ goto dai_link_of_err;
+
+ if (!of_property_read_u32(cpu_port, "mclk-fs", &val))
+ dai_props->mclk_fs = val;
+
+ ret = asoc_simple_card_parse_graph_cpu(cpu_ep, dai_link,
+ &single_cpu);
+ if (ret < 0)
+ goto dai_link_of_err;
+
+ ret = asoc_simple_card_parse_graph_codec(codec_ep, dai_link);
+ if (ret < 0)
+ goto dai_link_of_err;
+
+ ret = asoc_simple_card_parse_tdm(cpu_ep, cpu_dai);
+ if (ret < 0)
+ goto dai_link_of_err;
+
+ ret = asoc_simple_card_parse_tdm(codec_ep, codec_dai);
+ if (ret < 0)
+ goto dai_link_of_err;
+
+ ret = asoc_simple_card_parse_clk_cpu(cpu_ep, dai_link, cpu_dai);
+ if (ret < 0)
+ goto dai_link_of_err;
+
+ ret = asoc_simple_card_parse_clk_codec(codec_ep, dai_link, codec_dai);
+ if (ret < 0)
+ goto dai_link_of_err;
+
+ ret = asoc_simple_card_canonicalize_dailink(dai_link);
+ if (ret < 0)
+ goto dai_link_of_err;
+
+ ret = asoc_simple_card_parse_dailink_name(dev, dai_link);
+ if (ret < 0)
+ goto dai_link_of_err;
+
+ dai_link->ops = &asoc_simple_card_ops;
+ dai_link->init = asoc_simple_card_dai_init;
+
+ dev_dbg(dev, "\tname : %s\n", dai_link->stream_name);
+ dev_dbg(dev, "\tformat : %04x\n", dai_link->dai_fmt);
+ dev_dbg(dev, "\tcpu : %s / %d\n",
+ dai_link->cpu_dai_name,
+ dai_props->cpu_dai.sysclk);
+ dev_dbg(dev, "\tcodec : %s / %d\n",
+ dai_link->codec_dai_name,
+ dai_props->codec_dai.sysclk);
+
+ ret = asoc_simple_card_canonicalize_cpu(dai_link, single_cpu);
+ if (ret < 0)
+ goto dai_link_of_err;
+
+dai_link_of_err:
+ of_node_put(codec_ep);
+
+ return ret;
+}
+
+static int asoc_simple_card_parse_of(struct device_node *node,
+ struct simple_card_data *priv)
+{
+ struct device *dev = simple_priv_to_dev(priv);
+ struct device *cpu_dev = dev->parent;
+ struct device_node *cpu_port = of_graph_get_top_port(cpu_dev);
+ struct snd_soc_card *card = &priv->snd_card;
+ struct device_node *ep;
+ int i = 0;
+
+ u32 val;
+ int ret;
+
+ if (!node)
+ return -EINVAL;
+
+ /* Factor to mclk, used in hw_params() */
+ ret = of_property_read_u32(node, PREFIX "mclk-fs", &val);
+ if (ret == 0)
+ priv->mclk_fs = val;
+
+ for_each_endpoint_of_node(node, ep) {
+ ret = asoc_simple_card_dai_link_of(ep, priv, i);
+ if (ret < 0) {
+ of_node_put(ep);
+ return ret;
+ }
+ i++;
+ }
+
+ ret = asoc_simple_card_parse_card_widgets(card, cpu_port, PREFIX);
+ if (ret)
+ return ret;
+
+ ret = asoc_simple_card_parse_card_route(card, cpu_port, PREFIX);
+ if (ret)
+ return ret;
+
+ ret = asoc_simple_card_parse_card_name(card, cpu_port, PREFIX);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int asoc_simple_card_probe(struct platform_device *pdev)
+{
+ struct simple_card_data *priv;
+ struct snd_soc_dai_link *dai_link;
+ struct simple_dai_props *dai_props;
+ struct device *dev = &pdev->dev;
+ struct device *cpu_dev = pdev->dev.parent;
+ struct device_node *cpu_node = cpu_dev->of_node;
+ int num, ret;
+
+ num = of_graph_get_endpoint_count(cpu_node);
+
+ /* Allocate the private data and the DAI link array */
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ dai_props = devm_kzalloc(dev, sizeof(*dai_props) * num, GFP_KERNEL);
+ if (!dai_props)
+ return -ENOMEM;
+
+ dai_link = devm_kzalloc(dev, sizeof(*dai_link) * num, GFP_KERNEL);
+ if (!dai_link)
+ return -ENOMEM;
+
+ priv->dai_props = dai_props;
+ priv->dai_link = dai_link;
+
+ /* Init snd_soc_card */
+ priv->snd_card.owner = THIS_MODULE;
+ priv->snd_card.dev = dev;
+ priv->snd_card.dai_link = priv->dai_link;
+ priv->snd_card.num_links = num;
+
+ ret = asoc_simple_card_parse_of(cpu_node, priv);
+ if (ret < 0) {
+ if (ret != -EPROBE_DEFER)
+ dev_err(dev, "parse error %d\n", ret);
+ return ret;
+ }
+
+ snd_soc_card_set_drvdata(&priv->snd_card, priv);
+
+ ret = devm_snd_soc_register_card(dev, &priv->snd_card);
+ if (ret >= 0)
+ return ret;
+
+ return 0;
+}
+
+static int asoc_simple_card_remove(struct platform_device *pdev)
+{
+ struct snd_soc_card *card = platform_get_drvdata(pdev);
+ struct simple_card_data *priv = snd_soc_card_get_drvdata(card);
+
+ asoc_simple_card_remove_jack(&priv->hp_jack);
+ asoc_simple_card_remove_jack(&priv->mic_jack);
+
+ return 0;
+}
+
+static struct platform_driver asoc_simple_card = {
+ .driver = {
+ .name = "asoc-simple-graph-card",
+ },
+ .probe = asoc_simple_card_probe,
+ .remove = asoc_simple_card_remove,
+};
+module_platform_driver(asoc_simple_card);
+
+MODULE_ALIAS("platform:asoc-simple-graph-card");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("ASoC Simple Graph Sound Card");
+MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx at renesas.com>");
--
1.9.1
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