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332 lines
8.6 KiB
C
332 lines
8.6 KiB
C
/*
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* ASoC simple SCU sound card support
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*
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* Copyright (C) 2015 Renesas Solutions Corp.
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* Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
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*
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* based on ${LINUX}/sound/soc/generic/simple-card.c
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/clk.h>
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#include <linux/device.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/platform_device.h>
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#include <linux/string.h>
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#include <sound/jack.h>
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#include <sound/soc.h>
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#include <sound/soc-dai.h>
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#include <sound/simple_card_utils.h>
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struct simple_card_data {
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struct snd_soc_card snd_card;
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struct snd_soc_codec_conf codec_conf;
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struct asoc_simple_dai *dai_props;
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struct snd_soc_dai_link *dai_link;
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u32 convert_rate;
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u32 convert_channels;
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};
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#define simple_priv_to_dev(priv) ((priv)->snd_card.dev)
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#define simple_priv_to_link(priv, i) ((priv)->snd_card.dai_link + (i))
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#define simple_priv_to_props(priv, i) ((priv)->dai_props + (i))
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#define DAI "sound-dai"
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#define CELL "#sound-dai-cells"
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#define PREFIX "simple-audio-card,"
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static int asoc_simple_card_startup(struct snd_pcm_substream *substream)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
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struct asoc_simple_dai *dai_props =
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simple_priv_to_props(priv, rtd->num);
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return clk_prepare_enable(dai_props->clk);
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}
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static void asoc_simple_card_shutdown(struct snd_pcm_substream *substream)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
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struct asoc_simple_dai *dai_props =
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simple_priv_to_props(priv, rtd->num);
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clk_disable_unprepare(dai_props->clk);
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}
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static const struct snd_soc_ops asoc_simple_card_ops = {
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.startup = asoc_simple_card_startup,
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.shutdown = asoc_simple_card_shutdown,
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};
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static int asoc_simple_card_dai_init(struct snd_soc_pcm_runtime *rtd)
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{
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struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
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struct snd_soc_dai *dai;
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struct snd_soc_dai_link *dai_link;
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struct asoc_simple_dai *dai_props;
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int num = rtd->num;
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dai_link = simple_priv_to_link(priv, num);
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dai_props = simple_priv_to_props(priv, num);
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dai = dai_link->dynamic ?
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rtd->cpu_dai :
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rtd->codec_dai;
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return asoc_simple_card_init_dai(dai, dai_props);
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}
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static int asoc_simple_card_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
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struct snd_pcm_hw_params *params)
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{
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struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
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struct snd_interval *rate = hw_param_interval(params,
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SNDRV_PCM_HW_PARAM_RATE);
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struct snd_interval *channels = hw_param_interval(params,
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SNDRV_PCM_HW_PARAM_CHANNELS);
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if (priv->convert_rate)
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rate->min =
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rate->max = priv->convert_rate;
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if (priv->convert_channels)
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channels->min =
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channels->max = priv->convert_channels;
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return 0;
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}
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static int asoc_simple_card_dai_link_of(struct device_node *np,
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struct simple_card_data *priv,
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unsigned int daifmt,
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int idx, bool is_fe)
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{
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struct device *dev = simple_priv_to_dev(priv);
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struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, idx);
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struct asoc_simple_dai *dai_props = simple_priv_to_props(priv, idx);
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int ret;
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if (is_fe) {
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int is_single_links = 0;
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/* BE is dummy */
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dai_link->codec_of_node = NULL;
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dai_link->codec_dai_name = "snd-soc-dummy-dai";
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dai_link->codec_name = "snd-soc-dummy";
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/* FE settings */
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dai_link->dynamic = 1;
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dai_link->dpcm_merged_format = 1;
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ret = asoc_simple_card_parse_cpu(np, dai_link, DAI, CELL,
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&is_single_links);
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if (ret)
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return ret;
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ret = asoc_simple_card_parse_clk_cpu(np, dai_link, dai_props);
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if (ret < 0)
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return ret;
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ret = asoc_simple_card_set_dailink_name(dev, dai_link,
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"fe.%s",
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dai_link->cpu_dai_name);
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if (ret < 0)
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return ret;
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asoc_simple_card_canonicalize_cpu(dai_link, is_single_links);
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} else {
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/* FE is dummy */
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dai_link->cpu_of_node = NULL;
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dai_link->cpu_dai_name = "snd-soc-dummy-dai";
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dai_link->cpu_name = "snd-soc-dummy";
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/* BE settings */
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dai_link->no_pcm = 1;
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dai_link->be_hw_params_fixup = asoc_simple_card_be_hw_params_fixup;
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ret = asoc_simple_card_parse_codec(np, dai_link, DAI, CELL);
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if (ret < 0)
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return ret;
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ret = asoc_simple_card_parse_clk_codec(np, dai_link, dai_props);
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if (ret < 0)
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return ret;
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ret = asoc_simple_card_set_dailink_name(dev, dai_link,
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"be.%s",
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dai_link->codec_dai_name);
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if (ret < 0)
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return ret;
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snd_soc_of_parse_audio_prefix(&priv->snd_card,
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&priv->codec_conf,
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dai_link->codec_of_node,
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PREFIX "prefix");
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}
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ret = snd_soc_of_parse_tdm_slot(np,
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&dai_props->tx_slot_mask,
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&dai_props->rx_slot_mask,
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&dai_props->slots,
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&dai_props->slot_width);
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if (ret)
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return ret;
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ret = asoc_simple_card_canonicalize_dailink(dai_link);
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if (ret < 0)
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return ret;
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dai_link->dai_fmt = daifmt;
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dai_link->dpcm_playback = 1;
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dai_link->dpcm_capture = 1;
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dai_link->ops = &asoc_simple_card_ops;
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dai_link->init = asoc_simple_card_dai_init;
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dev_dbg(dev, "\t%s / %04x / %d\n",
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dai_link->name,
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dai_link->dai_fmt,
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dai_props->sysclk);
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return 0;
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}
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static int asoc_simple_card_parse_of(struct device_node *node,
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struct simple_card_data *priv)
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{
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struct device *dev = simple_priv_to_dev(priv);
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struct device_node *np;
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unsigned int daifmt = 0;
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bool is_fe;
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int ret, i;
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if (!node)
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return -EINVAL;
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ret = snd_soc_of_parse_audio_routing(&priv->snd_card, PREFIX "routing");
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if (ret < 0)
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return ret;
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/* sampling rate convert */
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of_property_read_u32(node, PREFIX "convert-rate", &priv->convert_rate);
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/* channels transfer */
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of_property_read_u32(node, PREFIX "convert-channels", &priv->convert_channels);
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/* find 1st codec */
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np = of_get_child_by_name(node, PREFIX "codec");
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if (!np)
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return -ENODEV;
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ret = asoc_simple_card_parse_daifmt(dev, node, np, PREFIX, &daifmt);
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if (ret < 0)
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return ret;
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i = 0;
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for_each_child_of_node(node, np) {
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is_fe = false;
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if (strcmp(np->name, PREFIX "cpu") == 0)
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is_fe = true;
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ret = asoc_simple_card_dai_link_of(np, priv, daifmt, i, is_fe);
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if (ret < 0)
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return ret;
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i++;
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}
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ret = asoc_simple_card_parse_card_name(&priv->snd_card, PREFIX);
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if (ret < 0)
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return ret;
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dev_dbg(dev, "New card: %s\n",
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priv->snd_card.name ? priv->snd_card.name : "");
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dev_dbg(dev, "convert_rate %d\n", priv->convert_rate);
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dev_dbg(dev, "convert_channels %d\n", priv->convert_channels);
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return 0;
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}
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static int asoc_simple_card_probe(struct platform_device *pdev)
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{
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struct simple_card_data *priv;
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struct snd_soc_dai_link *dai_link;
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struct asoc_simple_dai *dai_props;
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struct device *dev = &pdev->dev;
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struct device_node *np = pdev->dev.of_node;
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int num, ret;
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/* Allocate the private data */
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priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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num = of_get_child_count(np);
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dai_props = devm_kzalloc(dev, sizeof(*dai_props) * num, GFP_KERNEL);
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dai_link = devm_kzalloc(dev, sizeof(*dai_link) * num, GFP_KERNEL);
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if (!dai_props || !dai_link)
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return -ENOMEM;
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priv->dai_props = dai_props;
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priv->dai_link = dai_link;
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/* Init snd_soc_card */
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priv->snd_card.owner = THIS_MODULE;
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priv->snd_card.dev = dev;
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priv->snd_card.dai_link = priv->dai_link;
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priv->snd_card.num_links = num;
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priv->snd_card.codec_conf = &priv->codec_conf;
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priv->snd_card.num_configs = 1;
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ret = asoc_simple_card_parse_of(np, priv);
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if (ret < 0) {
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if (ret != -EPROBE_DEFER)
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dev_err(dev, "parse error %d\n", ret);
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goto err;
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}
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snd_soc_card_set_drvdata(&priv->snd_card, priv);
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ret = devm_snd_soc_register_card(&pdev->dev, &priv->snd_card);
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if (ret >= 0)
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return ret;
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err:
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asoc_simple_card_clean_reference(&priv->snd_card);
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return ret;
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}
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static int asoc_simple_card_remove(struct platform_device *pdev)
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{
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struct snd_soc_card *card = platform_get_drvdata(pdev);
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return asoc_simple_card_clean_reference(card);
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}
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static const struct of_device_id asoc_simple_of_match[] = {
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{ .compatible = "renesas,rsrc-card", },
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{ .compatible = "simple-scu-audio-card", },
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{},
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};
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MODULE_DEVICE_TABLE(of, asoc_simple_of_match);
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static struct platform_driver asoc_simple_card = {
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.driver = {
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.name = "simple-scu-audio-card",
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.of_match_table = asoc_simple_of_match,
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},
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.probe = asoc_simple_card_probe,
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.remove = asoc_simple_card_remove,
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};
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module_platform_driver(asoc_simple_card);
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MODULE_ALIAS("platform:asoc-simple-scu-card");
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MODULE_LICENSE("GPL v2");
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MODULE_DESCRIPTION("ASoC Simple SCU Sound Card");
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MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
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