From: Kuninori Morimoto kuninori.morimoto.gx@renesas.com
OF-graph base DT binding is 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, and we have simple-scu-card driver for simple-card + ALSA DPCM case. In the future, V4L2 / ALSA will support HDMI, and then, DT bindings between V4L2 / ALSA should be merged. This patch adds new Audio Graph SCU Card which is OF-graph base of simple-scu-card
Signed-off-by: Kuninori Morimoto kuninori.morimoto.gx@renesas.com --- sound/soc/generic/Kconfig | 9 + sound/soc/generic/Makefile | 2 + sound/soc/generic/audio-graph-scu-card.c | 416 +++++++++++++++++++++++++++++++ 3 files changed, 427 insertions(+) create mode 100644 sound/soc/generic/audio-graph-scu-card.c
diff --git a/sound/soc/generic/Kconfig b/sound/soc/generic/Kconfig index 121a48e..c954be0 100644 --- a/sound/soc/generic/Kconfig +++ b/sound/soc/generic/Kconfig @@ -22,3 +22,12 @@ config SND_AUDIO_GRAPH_CARD help This option enables generic simple simple sound card support with OF-graph DT bindings. + +config SND_AUDIO_GRAPH_SCU_CARD + tristate "ASoC Audio Graph SCU sound card support" + depends on OF + select SND_SIMPLE_CARD_UTILS + help + This option enables generic simple SCU sound card support + with OF-graph DT bindings. + It supports DPCM of multi CPU single Codec ststem. diff --git a/sound/soc/generic/Makefile b/sound/soc/generic/Makefile index 670068f..9e00052 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-audio-graph-card-objs := audio-graph-card.o +snd-soc-audio-graph-scu-card-objs := audio-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_AUDIO_GRAPH_CARD) += snd-soc-audio-graph-card.o +obj-$(CONFIG_SND_AUDIO_GRAPH_SCU_CARD) += snd-soc-audio-graph-scu-card.o diff --git a/sound/soc/generic/audio-graph-scu-card.c b/sound/soc/generic/audio-graph-scu-card.c new file mode 100644 index 0000000..64e8b97 --- /dev/null +++ b/sound/soc/generic/audio-graph-scu-card.c @@ -0,0 +1,416 @@ +/* + * ASoC audio graph SCU sound card support + * + * Copyright (C) 2017 Renesas Solutions Corp. + * Kuninori Morimoto kuninori.morimoto.gx@renesas.com + * + * based on + * ${LINUX}/sound/soc/generic/simple-scu-card.c + * ${LINUX}/sound/soc/generic/audio-graph-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 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 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 asoc_simple_dai *dai_props = graph_priv_to_props(priv, rtd->num); + + return clk_prepare_enable(dai_props->clk); +} + +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 asoc_simple_dai *dai_props = graph_priv_to_props(priv, rtd->num); + + clk_disable_unprepare(dai_props->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 *dai; + struct snd_soc_dai_link *dai_link; + struct asoc_simple_dai *dai_props; + int num = rtd->num; + + dai_link = graph_priv_to_link(priv, num); + dai_props = graph_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_graph_card_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd, + struct snd_pcm_hw_params *params) +{ + struct graph_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_graph_card_dai_link_of(struct device_node *ep, + struct graph_card_data *priv, + unsigned int daifmt, + int idx, int is_fe) +{ + struct device *dev = graph_priv_to_dev(priv); + struct snd_soc_dai_link *dai_link = graph_priv_to_link(priv, idx); + struct asoc_simple_dai *dai_props = graph_priv_to_props(priv, idx); + struct snd_soc_card *card = graph_priv_to_card(priv); + 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(dev, 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; + + /* card->num_links includes Codec */ + asoc_simple_card_canonicalize_cpu(dai_link, + (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_graph_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(dev, 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(card, + &priv->codec_conf, + dai_link->codec_of_node, + "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_graph_card_ops; + dai_link->init = asoc_graph_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_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; + struct device_node *cpu_port; + struct device_node *cpu_ep; + struct device_node *codec_ep; + struct device_node *rcpu_ep; + unsigned int daifmt = 0; + int dai_idx, ret; + int rc, codec; + + if (!node) + return -EINVAL; + + /* + * we need to consider "widgets", "mclk-fs" around here + * see simple-card + */ + + ret = snd_soc_of_parse_audio_routing(card, "routing"); + if (ret) + return ret; + + /* sampling rate convert */ + of_property_read_u32(node, "convert-rate", &priv->convert_rate); + + /* channels transfer */ + of_property_read_u32(node, "convert-channels", &priv->convert_channels); + + /* + * it supports multi CPU, single CODEC only here + * see asoc_graph_get_dais_count + */ + + /* find 1st codec */ + of_for_each_phandle(&it, rc, node, "dais", NULL, 0) { + cpu_port = it.node; + cpu_ep = of_get_next_child(cpu_port, NULL); + codec_ep = of_graph_get_remote_endpoint(cpu_ep); + rcpu_ep = of_graph_get_remote_endpoint(codec_ep); + + of_node_put(cpu_port); + of_node_put(cpu_ep); + of_node_put(codec_ep); + of_node_put(rcpu_ep); + + if (!codec_ep) + continue; + + 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 parse_of_err; + } + + ret = asoc_simple_card_parse_daifmt(dev, cpu_ep, codec_ep, + NULL, &daifmt); + if (ret < 0) + goto parse_of_err; + } + + dai_idx = 0; + for (codec = 0; codec < 2; codec++) { + /* + * To listup valid sounds continuously, + * detect all CPU-dummy first, and + * detect all dummy-Codec second + */ + of_for_each_phandle(&it, rc, node, "dais", NULL, 0) { + cpu_port = it.node; + cpu_ep = of_get_next_child(cpu_port, NULL); + codec_ep = of_graph_get_remote_endpoint(cpu_ep); + + of_node_put(cpu_port); + of_node_put(cpu_ep); + of_node_put(codec_ep); + + if (codec) { + if (!codec_ep) + continue; + + /* Back-End (= Codec) */ + ret = asoc_graph_card_dai_link_of(codec_ep, priv, daifmt, dai_idx++, 0); + if (ret < 0) + goto parse_of_err; + } else { + /* Front-End (= CPU) */ + ret = asoc_graph_card_dai_link_of(cpu_ep, priv, daifmt, dai_idx++, 1); + if (ret < 0) + goto parse_of_err; + } + } + } + + ret = asoc_simple_card_parse_card_name(card, NULL); + if (ret) + goto parse_of_err; + + dev_dbg(dev, "New card: %s\n", + card->name ? card->name : ""); + dev_dbg(dev, "convert_rate %d\n", priv->convert_rate); + dev_dbg(dev, "convert_channels %d\n", priv->convert_channels); + + ret = 0; + +parse_of_err: + return ret; +} + +static int asoc_graph_get_dais_count(struct device *dev) +{ + struct of_phandle_iterator it; + struct device_node *node = dev->of_node; + struct device_node *cpu_port; + struct device_node *cpu_ep; + struct device_node *codec_ep; + int count = 0; + int rc; + + of_for_each_phandle(&it, rc, node, "dais", NULL, 0) { + cpu_port = it.node; + cpu_ep = of_get_next_child(cpu_port, NULL); + codec_ep = of_graph_get_remote_endpoint(cpu_ep); + + of_node_put(cpu_port); + of_node_put(cpu_ep); + of_node_put(codec_ep); + + if (cpu_ep) + count++; + if (codec_ep) + count++; + } + + 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 asoc_simple_dai *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 = priv->dai_link; + card->num_links = num; + card->codec_conf = &priv->codec_conf; + card->num_configs = 1; + + 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-scu-card", }, + {}, +}; +MODULE_DEVICE_TABLE(of, asoc_graph_of_match); + +static struct platform_driver asoc_graph_card = { + .driver = { + .name = "asoc-audio-graph-scu-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-scu-card"); +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("ASoC Audio Graph SCU Sound Card"); +MODULE_AUTHOR("Kuninori Morimoto kuninori.morimoto.gx@renesas.com");