From: Kuninori Morimoto kuninori.morimoto.gx@renesas.com
OF-graph base DT binding are used on V4L2, and ALSA SoC is using different style of DT today. Now ALSA SoC supports simple-card driver for generic/simple sound card. In the future, V4L2 / ALSA will support HDMI, and then, DT bindings between V4L2 / ALSA should be merged. This patch adds new Audio Graph Card which is OF-graph base of simple-card
Signed-off-by: Kuninori Morimoto kuninori.morimoto.gx@renesas.com --- v4 -> v5
- added graph_priv_to_card() - use of_for_each_phandle()
sound/soc/generic/Kconfig | 8 + sound/soc/generic/Makefile | 2 + sound/soc/generic/audio-graph-card.c | 308 +++++++++++++++++++++++++++++++++++ 3 files changed, 318 insertions(+) create mode 100644 sound/soc/generic/audio-graph-card.c
diff --git a/sound/soc/generic/Kconfig b/sound/soc/generic/Kconfig index d023959..121a48e 100644 --- a/sound/soc/generic/Kconfig +++ b/sound/soc/generic/Kconfig @@ -14,3 +14,11 @@ config SND_SIMPLE_SCU_CARD help This option enables generic simple SCU sound card support. It supports DPCM of multi CPU single Codec system. + +config SND_AUDIO_GRAPH_CARD + tristate "ASoC Audio Graph sound card support" + depends on OF + select SND_SIMPLE_CARD_UTILS + help + This option enables generic simple simple sound card support + with OF-graph DT bindings. diff --git a/sound/soc/generic/Makefile b/sound/soc/generic/Makefile index ee750f3..670068f 100644 --- a/sound/soc/generic/Makefile +++ b/sound/soc/generic/Makefile @@ -1,7 +1,9 @@ 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-audio-graph-card-objs := audio-graph-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_AUDIO_GRAPH_CARD) += snd-soc-audio-graph-card.o diff --git a/sound/soc/generic/audio-graph-card.c b/sound/soc/generic/audio-graph-card.c new file mode 100644 index 0000000..07e010d --- /dev/null +++ b/sound/soc/generic/audio-graph-card.c @@ -0,0 +1,308 @@ +/* + * 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 + * + * 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 graph_card_data { + struct snd_soc_card snd_card; + struct graph_dai_props { + struct asoc_simple_dai cpu_dai; + struct asoc_simple_dai codec_dai; + } *dai_props; + struct snd_soc_dai_link *dai_link; +}; + +#define graph_priv_to_card(priv) (&(priv)->snd_card) +#define graph_priv_to_props(priv, i) ((priv)->dai_props + (i)) +#define graph_priv_to_dev(priv) (graph_priv_to_card(priv)->dev) +#define graph_priv_to_link(priv, i) (graph_priv_to_card(priv)->dai_link + (i)) + +static int asoc_graph_card_startup(struct snd_pcm_substream *substream) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct graph_card_data *priv = snd_soc_card_get_drvdata(rtd->card); + struct graph_dai_props *dai_props = graph_priv_to_props(priv, 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_graph_card_shutdown(struct snd_pcm_substream *substream) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct graph_card_data *priv = snd_soc_card_get_drvdata(rtd->card); + struct graph_dai_props *dai_props = graph_priv_to_props(priv, rtd->num); + + clk_disable_unprepare(dai_props->cpu_dai.clk); + + clk_disable_unprepare(dai_props->codec_dai.clk); +} + +static struct snd_soc_ops asoc_graph_card_ops = { + .startup = asoc_graph_card_startup, + .shutdown = asoc_graph_card_shutdown, +}; + +static int asoc_graph_card_dai_init(struct snd_soc_pcm_runtime *rtd) +{ + struct graph_card_data *priv = snd_soc_card_get_drvdata(rtd->card); + struct snd_soc_dai *codec = rtd->codec_dai; + struct snd_soc_dai *cpu = rtd->cpu_dai; + struct graph_dai_props *dai_props = + graph_priv_to_props(priv, rtd->num); + 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; + + return 0; +} + +static int asoc_graph_card_dai_link_of(struct device_node *cpu_port, + struct graph_card_data *priv, + int idx) +{ + struct device *dev = graph_priv_to_dev(priv); + struct snd_soc_dai_link *dai_link = graph_priv_to_link(priv, idx); + struct graph_dai_props *dai_props = graph_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 snd_soc_card *card = graph_priv_to_card(priv); + struct device_node *cpu_ep = of_get_next_child(cpu_port, NULL); + struct device_node *codec_ep = of_graph_get_remote_endpoint(cpu_ep); + struct device_node *rcpu_ep = of_graph_get_remote_endpoint(codec_ep); + int ret; + + if (rcpu_ep != cpu_ep) { + dev_err(dev, "remote-endpoint missmatch (%s/%s/%s)\n", + cpu_ep->name, codec_ep->name, rcpu_ep->name); + ret = -EINVAL; + goto dai_link_of_err; + } + + ret = asoc_simple_card_parse_daifmt(dev, cpu_ep, codec_ep, + NULL, &dai_link->dai_fmt); + if (ret < 0) + goto dai_link_of_err; + + /* + * we need to consider "mclk-fs" around here + * see simple-card + */ + + ret = asoc_simple_card_parse_graph_cpu(cpu_ep, dai_link); + 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 = snd_soc_of_parse_tdm_slot(cpu_ep, + &cpu_dai->tx_slot_mask, + &cpu_dai->rx_slot_mask, + &cpu_dai->slots, + &cpu_dai->slot_width); + if (ret < 0) + goto dai_link_of_err; + + ret = snd_soc_of_parse_tdm_slot(codec_ep, + &codec_dai->tx_slot_mask, + &codec_dai->rx_slot_mask, + &codec_dai->slots, + &codec_dai->slot_width); + if (ret < 0) + goto dai_link_of_err; + + ret = asoc_simple_card_parse_clk_cpu(dev, cpu_ep, dai_link, cpu_dai); + if (ret < 0) + goto dai_link_of_err; + + ret = asoc_simple_card_parse_clk_codec(dev, 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_set_dailink_name(dev, dai_link, + "%s-%s", + dai_link->cpu_dai_name, + dai_link->codec_dai_name); + if (ret < 0) + goto dai_link_of_err; + + dai_link->ops = &asoc_graph_card_ops; + dai_link->init = asoc_graph_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, + cpu_dai->sysclk); + dev_dbg(dev, "\tcodec : %s / %d\n", + dai_link->codec_dai_name, + codec_dai->sysclk); + + asoc_simple_card_canonicalize_cpu(dai_link, + card->num_links == 1); + +dai_link_of_err: + of_node_put(cpu_ep); + of_node_put(rcpu_ep); + of_node_put(codec_ep); + + return ret; +} + +static int asoc_graph_card_parse_of(struct graph_card_data *priv) +{ + struct of_phandle_iterator it; + struct device *dev = graph_priv_to_dev(priv); + struct snd_soc_card *card = graph_priv_to_card(priv); + struct device_node *node = dev->of_node; + int rc, idx = 0; + int ret; + + /* + * we need to consider "widgets", "routing", "mclk-fs" around here + * see simple-card + */ + + of_for_each_phandle(&it, rc, node, "dais", NULL, 0) { + ret = asoc_graph_card_dai_link_of(it.node, priv, idx++); + of_node_put(it.node); + if (ret < 0) + return ret; + } + + return asoc_simple_card_parse_card_name(card, NULL); +} + +static int asoc_graph_get_dais_count(struct device *dev) +{ + struct of_phandle_iterator it; + struct device_node *node = dev->of_node; + int count = 0; + int rc; + + of_for_each_phandle(&it, rc, node, "dais", NULL, 0) { + count++; + of_node_put(it.node); + } + + return count; +} + +static int asoc_graph_card_probe(struct platform_device *pdev) +{ + struct graph_card_data *priv; + struct snd_soc_dai_link *dai_link; + struct graph_dai_props *dai_props; + struct device *dev = &pdev->dev; + struct snd_soc_card *card; + int num, ret; + + /* Allocate the private data and the DAI link array */ + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + num = asoc_graph_get_dais_count(dev); + if (num == 0) + return -EINVAL; + + 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 */ + card = graph_priv_to_card(priv); + card->owner = THIS_MODULE; + card->dev = dev; + card->dai_link = dai_link; + card->num_links = num; + + ret = asoc_graph_card_parse_of(priv); + if (ret < 0) { + if (ret != -EPROBE_DEFER) + dev_err(dev, "parse error %d\n", ret); + goto err; + } + + snd_soc_card_set_drvdata(card, priv); + + ret = devm_snd_soc_register_card(dev, card); + if (ret >= 0) + return ret; +err: + asoc_simple_card_clean_reference(card); + + return ret; +} + +static int asoc_graph_card_remove(struct platform_device *pdev) +{ + struct snd_soc_card *card = platform_get_drvdata(pdev); + + return asoc_simple_card_clean_reference(card); +} + +static const struct of_device_id asoc_graph_of_match[] = { + { .compatible = "audio-graph-card", }, + {}, +}; +MODULE_DEVICE_TABLE(of, asoc_graph_of_match); + +static struct platform_driver asoc_graph_card = { + .driver = { + .name = "asoc-audio-graph-card", + .of_match_table = asoc_graph_of_match, + }, + .probe = asoc_graph_card_probe, + .remove = asoc_graph_card_remove, +}; +module_platform_driver(asoc_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");