[alsa-devel] [PATCH v4 12/12] ASoC: add simple-graph-scu-card support
Kuninori Morimoto
kuninori.morimoto.gx at renesas.com
Wed Nov 16 03:22:44 CET 2016
From: Kuninori Morimoto <kuninori.morimoto.gx at renesas.com>
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.
In the future, V4L2 / ALSA will support HDMI, and then, DT bindings
between V4L2 / ALSA should be merged somehow.
Sometimes, we would like to use DPCM base simple-card on graph base DT.
This patch adds graph base DT binding of simple-scu-card
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx at renesas.com>
---
v3 -> v4
- no change
sound/soc/generic/Kconfig | 8 +
sound/soc/generic/Makefile | 2 +
sound/soc/generic/simple-graph-scu-card.c | 417 ++++++++++++++++++++++++++++++
3 files changed, 427 insertions(+)
create mode 100644 sound/soc/generic/simple-graph-scu-card.c
diff --git a/sound/soc/generic/Kconfig b/sound/soc/generic/Kconfig
index efefabd..fc11828 100644
--- a/sound/soc/generic/Kconfig
+++ b/sound/soc/generic/Kconfig
@@ -21,3 +21,11 @@ config SND_SIMPLE_GRAPH_CARD
select SND_SIMPLE_CARD_UTILS
help
This option enables generic simple Graph sound card support
+
+config SND_SIMPLE_GRAPH_SCU_CARD
+ tristate "ASoC Simple Graph SCU sound card support"
+ depends on OF
+ select SND_SIMPLE_CARD_UTILS
+ help
+ This option enables generic simple Graph SCU sound card support.
+ It supports DPCM of multi CPU single Codec ststem.
diff --git a/sound/soc/generic/Makefile b/sound/soc/generic/Makefile
index 94eb6f1..fd75b55 100644
--- a/sound/soc/generic/Makefile
+++ b/sound/soc/generic/Makefile
@@ -2,8 +2,10 @@ snd-soc-simple-card-utils-objs := simple-card-utils.o
snd-soc-simple-card-objs := simple-card.o
snd-soc-simple-scu-card-objs := simple-scu-card.o
snd-soc-simple-graph-card-objs := simple-graph-card.o
+snd-soc-simple-graph-scu-card-objs := simple-graph-scu-card.o
obj-$(CONFIG_SND_SIMPLE_CARD_UTILS) += snd-soc-simple-card-utils.o
obj-$(CONFIG_SND_SIMPLE_CARD) += snd-soc-simple-card.o
obj-$(CONFIG_SND_SIMPLE_SCU_CARD) += snd-soc-simple-scu-card.o
obj-$(CONFIG_SND_SIMPLE_GRAPH_CARD) += snd-soc-simple-graph-card.o
+obj-$(CONFIG_SND_SIMPLE_GRAPH_SCU_CARD) += snd-soc-simple-graph-scu-card.o
diff --git a/sound/soc/generic/simple-graph-scu-card.c b/sound/soc/generic/simple-graph-scu-card.c
new file mode 100644
index 0000000..39a5019
--- /dev/null
+++ b/sound/soc/generic/simple-graph-scu-card.c
@@ -0,0 +1,417 @@
+/*
+ * ASoC simple graph SCU sound card support
+ *
+ * Copyright (C) 2016 Renesas Solutions Corp.
+ * Kuninori Morimoto <kuninori.morimoto.gx at renesas.com>
+ *
+ * based on
+ * ${LINUX}/sound/soc/generic/simple-graph-card.c
+ * ${LINUX}/sound/soc/generic/simple-scu-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_device.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_utils.h>
+
+struct simple_card_data {
+ struct snd_soc_card snd_card;
+ struct snd_soc_codec_conf codec_conf;
+ struct asoc_simple_dai *dai_props;
+ struct snd_soc_dai_link *dai_link;
+ u32 convert_rate;
+ u32 convert_channels;
+};
+
+#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 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 asoc_simple_dai *dai_props =
+ simple_priv_to_props(priv, rtd->num);
+
+ return clk_prepare_enable(dai_props->clk);
+}
+
+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 asoc_simple_dai *dai_props =
+ simple_priv_to_props(priv, rtd->num);
+
+ clk_disable_unprepare(dai_props->clk);
+}
+
+static struct snd_soc_ops asoc_simple_card_ops = {
+ .startup = asoc_simple_card_startup,
+ .shutdown = asoc_simple_card_shutdown,
+};
+
+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 snd_soc_dai *dai;
+ struct snd_soc_dai_link *dai_link;
+ struct asoc_simple_dai *dai_props;
+ int num = rtd->num;
+
+ dai_link = simple_priv_to_link(priv, num);
+ dai_props = simple_priv_to_props(priv, num);
+ dai = dai_link->dynamic ?
+ rtd->cpu_dai :
+ rtd->codec_dai;
+
+ return asoc_simple_card_init_dai(dai, dai_props);
+}
+
+static int asoc_simple_card_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
+ struct snd_pcm_hw_params *params)
+{
+ struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
+ struct snd_interval *rate = hw_param_interval(params,
+ SNDRV_PCM_HW_PARAM_RATE);
+ struct snd_interval *channels = hw_param_interval(params,
+ SNDRV_PCM_HW_PARAM_CHANNELS);
+
+ if (priv->convert_rate)
+ rate->min =
+ rate->max = priv->convert_rate;
+
+ if (priv->convert_channels)
+ channels->min =
+ channels->max = priv->convert_channels;
+
+ return 0;
+}
+
+static int asoc_simple_card_dai_link_of(struct device_node *port,
+ struct device_node *ep,
+ struct simple_card_data *priv,
+ unsigned int daifmt,
+ int idx, int is_fe)
+{
+ struct device *dev = simple_priv_to_dev(priv);
+ struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, idx);
+ struct asoc_simple_dai *dai_props = simple_priv_to_props(priv, idx);
+ int ret;
+
+ if (is_fe) {
+ /* BE is dummy */
+ dai_link->codec_of_node = NULL;
+ dai_link->codec_dai_name = "snd-soc-dummy-dai";
+ dai_link->codec_name = "snd-soc-dummy";
+
+ /* FE settings */
+ dai_link->dynamic = 1;
+ dai_link->dpcm_merged_format = 1;
+
+ ret = asoc_simple_card_parse_graph_cpu(ep, dai_link);
+ if (ret)
+ return ret;
+
+ ret = asoc_simple_card_parse_clk_cpu(ep, dai_link, dai_props);
+ if (ret < 0)
+ return ret;
+
+ ret = asoc_simple_card_set_dailink_name(dev, dai_link,
+ "fe.%s",
+ dai_link->cpu_dai_name);
+ if (ret < 0)
+ return ret;
+
+ /* snd_card.num_links includes Codec */
+ asoc_simple_card_canonicalize_cpu(dai_link,
+ (priv->snd_card.num_links -1) == 1);
+ } else {
+ /* FE is dummy */
+ dai_link->cpu_of_node = NULL;
+ dai_link->cpu_dai_name = "snd-soc-dummy-dai";
+ dai_link->cpu_name = "snd-soc-dummy";
+
+ /* BE settings */
+ dai_link->no_pcm = 1;
+ dai_link->be_hw_params_fixup = asoc_simple_card_be_hw_params_fixup;
+
+ ret = asoc_simple_card_parse_graph_codec(ep, dai_link);
+ if (ret < 0)
+ return ret;
+
+ ret = asoc_simple_card_parse_clk_codec(ep, dai_link, dai_props);
+ if (ret < 0)
+ return ret;
+
+ ret = asoc_simple_card_set_dailink_name(dev, dai_link,
+ "be.%s",
+ dai_link->codec_dai_name);
+ if (ret < 0)
+ return ret;
+
+ snd_soc_of_parse_audio_prefix_from_node(&priv->snd_card,
+ port,
+ &priv->codec_conf,
+ dai_link->codec_of_node,
+ PREFIX "prefix");
+ }
+
+ ret = snd_soc_of_parse_tdm_slot(ep,
+ &dai_props->tx_slot_mask,
+ &dai_props->rx_slot_mask,
+ &dai_props->slots,
+ &dai_props->slot_width);
+ if (ret)
+ return ret;
+
+ ret = asoc_simple_card_canonicalize_dailink(dai_link);
+ if (ret < 0)
+ return ret;
+
+ dai_link->dai_fmt = daifmt;
+ dai_link->dpcm_playback = 1;
+ dai_link->dpcm_capture = 1;
+ dai_link->ops = &asoc_simple_card_ops;
+ dai_link->init = asoc_simple_card_dai_init;
+
+ dev_dbg(dev, "\t%s / %04x / %d\n",
+ dai_link->name,
+ dai_link->dai_fmt,
+ dai_props->sysclk);
+
+ return 0;
+}
+
+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 *ports = of_graph_get_top_port(cpu_dev);
+ struct snd_soc_card *card = &priv->snd_card;
+ struct device_node *port, *cpu_ep, *r_cpu_ep, *codec_ep;
+ unsigned int daifmt = 0;
+ int i, ret, done;
+
+ if (!node)
+ return -EINVAL;
+
+ ret = snd_soc_of_parse_audio_routing_from_node(&priv->snd_card,
+ ports, PREFIX "routing");
+ if (ret)
+ return ret;
+
+ /* sampling rate convert */
+ of_property_read_u32(ports, PREFIX "convert-rate",
+ &priv->convert_rate);
+
+ /* channels transfer */
+ of_property_read_u32(ports, PREFIX "convert-channels",
+ &priv->convert_channels);
+
+ /*
+ * it supports multi CPU, single CODEC only here.
+ */
+
+ /* find 1st codec */
+ done = 0;
+ for_each_of_port(node, port) {
+ /* keep for_each for of_node_get/of_node_put */
+ if (done)
+ continue;
+
+ for_each_of_endpoint_in_port(port, cpu_ep) {
+ /* keep for_each for of_node_get/of_node_put */
+ if (done)
+ continue;
+
+ codec_ep = of_graph_get_remote_endpoint(cpu_ep);
+ r_cpu_ep = of_graph_get_remote_endpoint(codec_ep);
+ of_node_put(codec_ep);
+ of_node_put(r_cpu_ep);
+ if (cpu_ep != r_cpu_ep) {
+ ret = -EINVAL;
+ goto parse_of_err;
+ }
+
+ ret = asoc_simple_card_parse_daifmt(dev,
+ ports, codec_ep,
+ PREFIX, &daifmt);
+ if (ret < 0)
+ goto parse_of_err;
+
+ done = 1;
+ }
+ }
+
+ /* Front-End (= CPU) */
+ i = 0;
+ for_each_of_port(node, port) {
+ for_each_of_endpoint_in_port(port, cpu_ep) {
+ ret = asoc_simple_card_dai_link_of(
+ port, cpu_ep, priv, daifmt, i, 1);
+ if (ret < 0)
+ goto parse_of_err;
+ i++;
+ }
+ }
+
+ /* Back-End (= Codec) */
+ done = 0;
+ for_each_of_port(node, port) {
+ /* keep for_each for of_node_get/of_node_put */
+ if (done)
+ continue;
+
+ for_each_of_endpoint_in_port(port, cpu_ep) {
+ /* keep for_each for of_node_get/of_node_put */
+ if (done)
+ continue;
+
+ codec_ep = of_graph_get_remote_endpoint(cpu_ep);
+ r_cpu_ep = of_graph_get_remote_endpoint(codec_ep);
+ of_node_put(codec_ep);
+ of_node_put(r_cpu_ep);
+ if (cpu_ep != r_cpu_ep) {
+ ret = -EINVAL;
+ goto parse_of_err;
+ }
+
+ ret = asoc_simple_card_dai_link_of(
+ port, codec_ep, priv, daifmt, i, 0);
+ if (ret < 0)
+ goto parse_of_err;
+ i++;
+
+ done = 1;
+ }
+ }
+
+ ret = asoc_simple_card_parse_card_name(card, ports, PREFIX);
+ if (ret)
+ return ret;
+
+ dev_dbg(dev, "New card: %s\n",
+ priv->snd_card.name ? priv->snd_card.name : "");
+ dev_dbg(dev, "convert_rate %d\n", priv->convert_rate);
+ dev_dbg(dev, "convert_channels %d\n", priv->convert_channels);
+
+ return 0;
+parse_of_err:
+ of_node_put(port);
+ of_node_put(cpu_ep);
+
+ return ret;
+}
+
+static int asoc_simple_card_probe(struct platform_device *pdev)
+{
+ struct simple_card_data *priv;
+ struct snd_soc_dai_link *dai_link;
+ struct asoc_simple_dai *dai_props;
+ struct device *dev = &pdev->dev;
+ struct device *cpu_dev = pdev->dev.parent;
+ struct device_node *cpu_node = cpu_dev->of_node;
+ struct asoc_simple_graph_card_info *info = pdev->dev.platform_data;
+ int num, ret;
+
+ /* Allocate the private data and the DAI link array */
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ /* it supports multi CPU, single CODEC only here */
+ num = info->endpoint_num + 1; /* +1 for Codec */
+
+ dai_props = devm_kzalloc(dev, sizeof(*dai_props) * num, GFP_KERNEL);
+ dai_link = devm_kzalloc(dev, sizeof(*dai_link) * num, GFP_KERNEL);
+ if (!dai_props || !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;
+ priv->snd_card.codec_conf = &priv->codec_conf;
+ priv->snd_card.num_configs = 1;
+
+ ret = asoc_simple_card_parse_of(cpu_node, priv);
+ if (ret < 0) {
+ if (ret != -EPROBE_DEFER)
+ dev_err(dev, "parse error %d\n", ret);
+ goto err;
+ }
+
+ /*
+ * FIXME
+ *
+ * This driver is assuming that it will be called from
+ * asoc_simple_card_try_to_probe_graph_card() which
+ * is using platform_device_register_full().
+ * This means it is not came from DT. But this driver itself
+ * will be used as part of ALSA SoC (= sound card).
+ * Because of these background, it might fail in
+ * snd_pcm_lib_malloc_pages() on .hw_params.
+ * Because, noone cares its dma_ops, and result of get_dma_ops()
+ * is based on its architecture.
+ * So, it should call arch_setup_dma_ops() from somewhere,
+ * otherwise, for example, ARM is no problem, but ARM64 will be fail.
+ * But, of_platform_device_xxx() are not good solution today.
+ * This driver calls it by itself here. Please fixme
+ * see also
+ * linux/sound/soc/generic/simple-card-utils.c ::
+ * asoc_simple_card_try_to_probe_graph_card()
+ */
+ of_dma_configure(dev, dev->of_node);
+
+ snd_soc_card_set_drvdata(&priv->snd_card, priv);
+
+ ret = devm_snd_soc_register_card(dev, &priv->snd_card);
+ if (ret >= 0)
+ return ret;
+err:
+ asoc_simple_card_clean_reference(&priv->snd_card);
+
+ return ret;
+}
+
+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);
+
+ return asoc_simple_card_clean_reference(&priv->snd_card);
+}
+
+static struct platform_driver asoc_simple_card = {
+ .driver = {
+ .name = "asoc-simple-graph-scu-card",
+ },
+ .probe = asoc_simple_card_probe,
+ .remove = asoc_simple_card_remove,
+};
+module_platform_driver(asoc_simple_card);
+
+MODULE_ALIAS("platform:asoc-simple-graph-scu-card");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("ASoC Simple Graph SCU Sound Card");
+MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx at renesas.com>");
--
1.9.1
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