357 lines
8.1 KiB
C
357 lines
8.1 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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//
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// Copyright (c) 2020 BayLibre, SAS.
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// Author: Jerome Brunet <jbrunet@baylibre.com>
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#include <linux/module.h>
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#include <linux/of_platform.h>
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#include <sound/soc.h>
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#include "meson-card.h"
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int meson_card_i2s_set_sysclk(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params,
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unsigned int mclk_fs)
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{
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struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
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struct snd_soc_dai *codec_dai;
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unsigned int mclk;
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int ret, i;
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if (!mclk_fs)
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return 0;
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mclk = params_rate(params) * mclk_fs;
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for_each_rtd_codec_dais(rtd, i, codec_dai) {
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ret = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
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SND_SOC_CLOCK_IN);
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if (ret && ret != -ENOTSUPP)
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return ret;
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}
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ret = snd_soc_dai_set_sysclk(asoc_rtd_to_cpu(rtd, 0), 0, mclk,
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SND_SOC_CLOCK_OUT);
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if (ret && ret != -ENOTSUPP)
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return ret;
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return 0;
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}
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EXPORT_SYMBOL_GPL(meson_card_i2s_set_sysclk);
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int meson_card_reallocate_links(struct snd_soc_card *card,
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unsigned int num_links)
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{
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struct meson_card *priv = snd_soc_card_get_drvdata(card);
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struct snd_soc_dai_link *links;
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void **ldata;
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links = krealloc(priv->card.dai_link,
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num_links * sizeof(*priv->card.dai_link),
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GFP_KERNEL | __GFP_ZERO);
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if (!links)
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goto err_links;
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ldata = krealloc(priv->link_data,
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num_links * sizeof(*priv->link_data),
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GFP_KERNEL | __GFP_ZERO);
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if (!ldata)
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goto err_ldata;
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priv->card.dai_link = links;
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priv->link_data = ldata;
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priv->card.num_links = num_links;
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return 0;
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err_ldata:
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kfree(links);
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err_links:
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dev_err(priv->card.dev, "failed to allocate links\n");
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return -ENOMEM;
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}
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EXPORT_SYMBOL_GPL(meson_card_reallocate_links);
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int meson_card_parse_dai(struct snd_soc_card *card,
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struct device_node *node,
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struct device_node **dai_of_node,
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const char **dai_name)
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{
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struct of_phandle_args args;
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int ret;
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if (!dai_name || !dai_of_node || !node)
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return -EINVAL;
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ret = of_parse_phandle_with_args(node, "sound-dai",
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"#sound-dai-cells", 0, &args);
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if (ret)
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return dev_err_probe(card->dev, ret, "can't parse dai\n");
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*dai_of_node = args.np;
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return snd_soc_get_dai_name(&args, dai_name);
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}
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EXPORT_SYMBOL_GPL(meson_card_parse_dai);
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static int meson_card_set_link_name(struct snd_soc_card *card,
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struct snd_soc_dai_link *link,
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struct device_node *node,
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const char *prefix)
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{
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char *name = devm_kasprintf(card->dev, GFP_KERNEL, "%s.%s",
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prefix, node->full_name);
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if (!name)
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return -ENOMEM;
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link->name = name;
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link->stream_name = name;
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return 0;
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}
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unsigned int meson_card_parse_daifmt(struct device_node *node,
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struct device_node *cpu_node)
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{
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struct device_node *bitclkmaster = NULL;
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struct device_node *framemaster = NULL;
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unsigned int daifmt;
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daifmt = snd_soc_daifmt_parse_format(node, NULL);
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snd_soc_daifmt_parse_clock_provider_as_phandle(node, NULL, &bitclkmaster, &framemaster);
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/* If no master is provided, default to cpu master */
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if (!bitclkmaster || bitclkmaster == cpu_node) {
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daifmt |= (!framemaster || framemaster == cpu_node) ?
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SND_SOC_DAIFMT_CBS_CFS : SND_SOC_DAIFMT_CBS_CFM;
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} else {
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daifmt |= (!framemaster || framemaster == cpu_node) ?
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SND_SOC_DAIFMT_CBM_CFS : SND_SOC_DAIFMT_CBM_CFM;
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}
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of_node_put(bitclkmaster);
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of_node_put(framemaster);
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return daifmt;
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}
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EXPORT_SYMBOL_GPL(meson_card_parse_daifmt);
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int meson_card_set_be_link(struct snd_soc_card *card,
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struct snd_soc_dai_link *link,
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struct device_node *node)
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{
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struct snd_soc_dai_link_component *codec;
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struct device_node *np;
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int ret, num_codecs;
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num_codecs = of_get_child_count(node);
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if (!num_codecs) {
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dev_err(card->dev, "be link %s has no codec\n",
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node->full_name);
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return -EINVAL;
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}
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codec = devm_kcalloc(card->dev, num_codecs, sizeof(*codec), GFP_KERNEL);
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if (!codec)
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return -ENOMEM;
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link->codecs = codec;
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link->num_codecs = num_codecs;
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for_each_child_of_node(node, np) {
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ret = meson_card_parse_dai(card, np, &codec->of_node,
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&codec->dai_name);
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if (ret) {
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of_node_put(np);
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return ret;
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}
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codec++;
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}
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ret = meson_card_set_link_name(card, link, node, "be");
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if (ret)
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dev_err(card->dev, "error setting %pOFn link name\n", np);
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return ret;
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}
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EXPORT_SYMBOL_GPL(meson_card_set_be_link);
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int meson_card_set_fe_link(struct snd_soc_card *card,
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struct snd_soc_dai_link *link,
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struct device_node *node,
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bool is_playback)
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{
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struct snd_soc_dai_link_component *codec;
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codec = devm_kzalloc(card->dev, sizeof(*codec), GFP_KERNEL);
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if (!codec)
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return -ENOMEM;
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link->codecs = codec;
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link->num_codecs = 1;
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link->dynamic = 1;
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link->dpcm_merged_format = 1;
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link->dpcm_merged_chan = 1;
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link->dpcm_merged_rate = 1;
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link->codecs->dai_name = "snd-soc-dummy-dai";
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link->codecs->name = "snd-soc-dummy";
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if (is_playback)
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link->dpcm_playback = 1;
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else
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link->dpcm_capture = 1;
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return meson_card_set_link_name(card, link, node, "fe");
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}
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EXPORT_SYMBOL_GPL(meson_card_set_fe_link);
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static int meson_card_add_links(struct snd_soc_card *card)
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{
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struct meson_card *priv = snd_soc_card_get_drvdata(card);
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struct device_node *node = card->dev->of_node;
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struct device_node *np;
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int num, i, ret;
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num = of_get_child_count(node);
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if (!num) {
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dev_err(card->dev, "card has no links\n");
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return -EINVAL;
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}
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ret = meson_card_reallocate_links(card, num);
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if (ret)
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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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ret = priv->match_data->add_link(card, np, &i);
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if (ret) {
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of_node_put(np);
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return ret;
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}
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i++;
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}
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return 0;
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}
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static int meson_card_parse_of_optional(struct snd_soc_card *card,
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const char *propname,
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int (*func)(struct snd_soc_card *c,
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const char *p))
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{
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/* If property is not provided, don't fail ... */
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if (!of_property_read_bool(card->dev->of_node, propname))
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return 0;
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/* ... but do fail if it is provided and the parsing fails */
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return func(card, propname);
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}
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static void meson_card_clean_references(struct meson_card *priv)
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{
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struct snd_soc_card *card = &priv->card;
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struct snd_soc_dai_link *link;
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struct snd_soc_dai_link_component *codec;
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struct snd_soc_aux_dev *aux;
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int i, j;
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if (card->dai_link) {
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for_each_card_prelinks(card, i, link) {
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if (link->cpus)
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of_node_put(link->cpus->of_node);
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for_each_link_codecs(link, j, codec)
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of_node_put(codec->of_node);
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}
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}
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if (card->aux_dev) {
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for_each_card_pre_auxs(card, i, aux)
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of_node_put(aux->dlc.of_node);
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}
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kfree(card->dai_link);
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kfree(priv->link_data);
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}
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int meson_card_probe(struct platform_device *pdev)
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{
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const struct meson_card_match_data *data;
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struct device *dev = &pdev->dev;
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struct meson_card *priv;
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int ret;
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data = of_device_get_match_data(dev);
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if (!data) {
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dev_err(dev, "failed to match device\n");
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return -ENODEV;
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}
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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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platform_set_drvdata(pdev, priv);
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snd_soc_card_set_drvdata(&priv->card, priv);
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priv->card.owner = THIS_MODULE;
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priv->card.dev = dev;
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priv->card.driver_name = dev->driver->name;
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priv->match_data = data;
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ret = snd_soc_of_parse_card_name(&priv->card, "model");
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if (ret < 0)
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return ret;
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ret = meson_card_parse_of_optional(&priv->card, "audio-routing",
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snd_soc_of_parse_audio_routing);
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if (ret) {
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dev_err(dev, "error while parsing routing\n");
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return ret;
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}
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ret = meson_card_parse_of_optional(&priv->card, "audio-widgets",
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snd_soc_of_parse_audio_simple_widgets);
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if (ret) {
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dev_err(dev, "error while parsing widgets\n");
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return ret;
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}
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ret = meson_card_add_links(&priv->card);
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if (ret)
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goto out_err;
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ret = snd_soc_of_parse_aux_devs(&priv->card, "audio-aux-devs");
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if (ret)
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goto out_err;
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ret = devm_snd_soc_register_card(dev, &priv->card);
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if (ret)
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goto out_err;
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return 0;
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out_err:
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meson_card_clean_references(priv);
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return ret;
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}
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EXPORT_SYMBOL_GPL(meson_card_probe);
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int meson_card_remove(struct platform_device *pdev)
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{
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struct meson_card *priv = platform_get_drvdata(pdev);
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meson_card_clean_references(priv);
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return 0;
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}
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EXPORT_SYMBOL_GPL(meson_card_remove);
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MODULE_DESCRIPTION("Amlogic Sound Card Utils");
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MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
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MODULE_LICENSE("GPL v2");
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