From: Kuninori Morimoto kuninori.morimoto.gx@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@renesas.com --- 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@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@renesas.com");