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1// SPDX-License-Identifier: GPL-2.02//3// Copyright (c) 2020 BayLibre, SAS.4// Author: Jerome Brunet <jbrunet@baylibre.com>5 6#include <linux/module.h>7#include <linux/of_platform.h>8#include <sound/soc.h>9 10#include "meson-card.h"11 12int meson_card_i2s_set_sysclk(struct snd_pcm_substream *substream,13 struct snd_pcm_hw_params *params,14 unsigned int mclk_fs)15{16 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);17 struct snd_soc_dai *codec_dai;18 unsigned int mclk;19 int ret, i;20 21 if (!mclk_fs)22 return 0;23 24 mclk = params_rate(params) * mclk_fs;25 26 for_each_rtd_codec_dais(rtd, i, codec_dai) {27 ret = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,28 SND_SOC_CLOCK_IN);29 if (ret && ret != -ENOTSUPP)30 return ret;31 }32 33 ret = snd_soc_dai_set_sysclk(snd_soc_rtd_to_cpu(rtd, 0), 0, mclk,34 SND_SOC_CLOCK_OUT);35 if (ret && ret != -ENOTSUPP)36 return ret;37 38 return 0;39}40EXPORT_SYMBOL_GPL(meson_card_i2s_set_sysclk);41 42int meson_card_reallocate_links(struct snd_soc_card *card,43 unsigned int num_links)44{45 struct meson_card *priv = snd_soc_card_get_drvdata(card);46 struct snd_soc_dai_link *links;47 void **ldata;48 49 links = krealloc(priv->card.dai_link,50 num_links * sizeof(*priv->card.dai_link),51 GFP_KERNEL | __GFP_ZERO);52 if (!links)53 goto err_links;54 55 ldata = krealloc(priv->link_data,56 num_links * sizeof(*priv->link_data),57 GFP_KERNEL | __GFP_ZERO);58 if (!ldata)59 goto err_ldata;60 61 priv->card.dai_link = links;62 priv->link_data = ldata;63 priv->card.num_links = num_links;64 return 0;65 66err_ldata:67 kfree(links);68err_links:69 dev_err(priv->card.dev, "failed to allocate links\n");70 return -ENOMEM;71 72}73EXPORT_SYMBOL_GPL(meson_card_reallocate_links);74 75int meson_card_parse_dai(struct snd_soc_card *card,76 struct device_node *node,77 struct snd_soc_dai_link_component *dlc)78{79 int ret;80 81 if (!dlc || !node)82 return -EINVAL;83 84 ret = snd_soc_of_get_dlc(node, NULL, dlc, 0);85 if (ret)86 return dev_err_probe(card->dev, ret, "can't parse dai\n");87 88 return ret;89}90EXPORT_SYMBOL_GPL(meson_card_parse_dai);91 92static int meson_card_set_link_name(struct snd_soc_card *card,93 struct snd_soc_dai_link *link,94 struct device_node *node,95 const char *prefix)96{97 char *name = devm_kasprintf(card->dev, GFP_KERNEL, "%s.%s",98 prefix, node->full_name);99 if (!name)100 return -ENOMEM;101 102 link->name = name;103 link->stream_name = name;104 105 return 0;106}107 108unsigned int meson_card_parse_daifmt(struct device_node *node,109 struct device_node *cpu_node)110{111 struct device_node *bitclkmaster = NULL;112 struct device_node *framemaster = NULL;113 unsigned int daifmt;114 115 daifmt = snd_soc_daifmt_parse_format(node, NULL);116 117 snd_soc_daifmt_parse_clock_provider_as_phandle(node, NULL, &bitclkmaster, &framemaster);118 119 /* If no master is provided, default to cpu master */120 if (!bitclkmaster || bitclkmaster == cpu_node) {121 daifmt |= (!framemaster || framemaster == cpu_node) ?122 SND_SOC_DAIFMT_CBS_CFS : SND_SOC_DAIFMT_CBS_CFM;123 } else {124 daifmt |= (!framemaster || framemaster == cpu_node) ?125 SND_SOC_DAIFMT_CBM_CFS : SND_SOC_DAIFMT_CBM_CFM;126 }127 128 of_node_put(bitclkmaster);129 of_node_put(framemaster);130 131 return daifmt;132}133EXPORT_SYMBOL_GPL(meson_card_parse_daifmt);134 135int meson_card_set_be_link(struct snd_soc_card *card,136 struct snd_soc_dai_link *link,137 struct device_node *node)138{139 struct snd_soc_dai_link_component *codec;140 struct device_node *np;141 int ret, num_codecs;142 143 num_codecs = of_get_child_count(node);144 if (!num_codecs) {145 dev_err(card->dev, "be link %s has no codec\n",146 node->full_name);147 return -EINVAL;148 }149 150 codec = devm_kcalloc(card->dev, num_codecs, sizeof(*codec), GFP_KERNEL);151 if (!codec)152 return -ENOMEM;153 154 link->codecs = codec;155 link->num_codecs = num_codecs;156 157 for_each_child_of_node(node, np) {158 ret = meson_card_parse_dai(card, np, codec);159 if (ret) {160 of_node_put(np);161 return ret;162 }163 164 codec++;165 }166 167 ret = meson_card_set_link_name(card, link, node, "be");168 if (ret)169 dev_err(card->dev, "error setting %pOFn link name\n", np);170 171 return ret;172}173EXPORT_SYMBOL_GPL(meson_card_set_be_link);174 175int meson_card_set_fe_link(struct snd_soc_card *card,176 struct snd_soc_dai_link *link,177 struct device_node *node,178 bool is_playback)179{180 link->codecs = &snd_soc_dummy_dlc;181 link->num_codecs = 1;182 183 link->dynamic = 1;184 link->dpcm_merged_format = 1;185 link->dpcm_merged_chan = 1;186 link->dpcm_merged_rate = 1;187 188 if (is_playback)189 link->playback_only = 1;190 else191 link->capture_only = 1;192 193 return meson_card_set_link_name(card, link, node, "fe");194}195EXPORT_SYMBOL_GPL(meson_card_set_fe_link);196 197static int meson_card_add_links(struct snd_soc_card *card)198{199 struct meson_card *priv = snd_soc_card_get_drvdata(card);200 struct device_node *node = card->dev->of_node;201 struct device_node *np;202 int num, i, ret;203 204 num = of_get_child_count(node);205 if (!num) {206 dev_err(card->dev, "card has no links\n");207 return -EINVAL;208 }209 210 ret = meson_card_reallocate_links(card, num);211 if (ret)212 return ret;213 214 i = 0;215 for_each_child_of_node(node, np) {216 ret = priv->match_data->add_link(card, np, &i);217 if (ret) {218 of_node_put(np);219 return ret;220 }221 222 i++;223 }224 225 return 0;226}227 228static int meson_card_parse_of_optional(struct snd_soc_card *card,229 const char *propname,230 int (*func)(struct snd_soc_card *c,231 const char *p))232{233 /* If property is not provided, don't fail ... */234 if (!of_property_read_bool(card->dev->of_node, propname))235 return 0;236 237 /* ... but do fail if it is provided and the parsing fails */238 return func(card, propname);239}240 241static void meson_card_clean_references(struct meson_card *priv)242{243 struct snd_soc_card *card = &priv->card;244 struct snd_soc_dai_link *link;245 struct snd_soc_dai_link_component *codec;246 struct snd_soc_aux_dev *aux;247 int i, j;248 249 if (card->dai_link) {250 for_each_card_prelinks(card, i, link) {251 if (link->cpus)252 of_node_put(link->cpus->of_node);253 for_each_link_codecs(link, j, codec)254 of_node_put(codec->of_node);255 }256 }257 258 if (card->aux_dev) {259 for_each_card_pre_auxs(card, i, aux)260 of_node_put(aux->dlc.of_node);261 }262 263 kfree(card->dai_link);264 kfree(priv->link_data);265}266 267int meson_card_probe(struct platform_device *pdev)268{269 const struct meson_card_match_data *data;270 struct device *dev = &pdev->dev;271 struct meson_card *priv;272 int ret;273 274 data = of_device_get_match_data(dev);275 if (!data) {276 dev_err(dev, "failed to match device\n");277 return -ENODEV;278 }279 280 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);281 if (!priv)282 return -ENOMEM;283 284 platform_set_drvdata(pdev, priv);285 snd_soc_card_set_drvdata(&priv->card, priv);286 287 priv->card.owner = THIS_MODULE;288 priv->card.dev = dev;289 priv->card.driver_name = dev->driver->name;290 priv->match_data = data;291 292 ret = snd_soc_of_parse_card_name(&priv->card, "model");293 if (ret < 0)294 return ret;295 296 ret = meson_card_parse_of_optional(&priv->card, "audio-routing",297 snd_soc_of_parse_audio_routing);298 if (ret) {299 dev_err(dev, "error while parsing routing\n");300 return ret;301 }302 303 ret = meson_card_parse_of_optional(&priv->card, "audio-widgets",304 snd_soc_of_parse_audio_simple_widgets);305 if (ret) {306 dev_err(dev, "error while parsing widgets\n");307 return ret;308 }309 310 ret = meson_card_add_links(&priv->card);311 if (ret)312 goto out_err;313 314 ret = snd_soc_of_parse_aux_devs(&priv->card, "audio-aux-devs");315 if (ret)316 goto out_err;317 318 ret = devm_snd_soc_register_card(dev, &priv->card);319 if (ret)320 goto out_err;321 322 return 0;323 324out_err:325 meson_card_clean_references(priv);326 return ret;327}328EXPORT_SYMBOL_GPL(meson_card_probe);329 330void meson_card_remove(struct platform_device *pdev)331{332 struct meson_card *priv = platform_get_drvdata(pdev);333 334 meson_card_clean_references(priv);335}336EXPORT_SYMBOL_GPL(meson_card_remove);337 338MODULE_DESCRIPTION("Amlogic Sound Card Utils");339MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");340MODULE_LICENSE("GPL v2");341