1 // SPDX-License-Identifier: GPL-2.0
3 // Copyright (c) 2020 BayLibre, SAS.
4 // Author: Jerome Brunet <jbrunet@baylibre.com>
6 #include <linux/module.h>
7 #include <linux/of_platform.h>
10 #include "meson-card.h"
12 int meson_card_i2s_set_sysclk(struct snd_pcm_substream *substream,
13 struct snd_pcm_hw_params *params,
16 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
17 struct snd_soc_dai *codec_dai;
24 mclk = params_rate(params) * mclk_fs;
26 for_each_rtd_codec_dais(rtd, i, codec_dai) {
27 ret = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
29 if (ret && ret != -ENOTSUPP)
33 ret = snd_soc_dai_set_sysclk(asoc_rtd_to_cpu(rtd, 0), 0, mclk,
35 if (ret && ret != -ENOTSUPP)
40 EXPORT_SYMBOL_GPL(meson_card_i2s_set_sysclk);
42 int meson_card_reallocate_links(struct snd_soc_card *card,
43 unsigned int num_links)
45 struct meson_card *priv = snd_soc_card_get_drvdata(card);
46 struct snd_soc_dai_link *links;
49 links = krealloc(priv->card.dai_link,
50 num_links * sizeof(*priv->card.dai_link),
51 GFP_KERNEL | __GFP_ZERO);
55 ldata = krealloc(priv->link_data,
56 num_links * sizeof(*priv->link_data),
57 GFP_KERNEL | __GFP_ZERO);
61 priv->card.dai_link = links;
62 priv->link_data = ldata;
63 priv->card.num_links = num_links;
69 dev_err(priv->card.dev, "failed to allocate links\n");
73 EXPORT_SYMBOL_GPL(meson_card_reallocate_links);
75 int meson_card_parse_dai(struct snd_soc_card *card,
76 struct device_node *node,
77 struct snd_soc_dai_link_component *dlc)
84 ret = snd_soc_of_get_dlc(node, NULL, dlc, 0);
86 return dev_err_probe(card->dev, ret, "can't parse dai\n");
90 EXPORT_SYMBOL_GPL(meson_card_parse_dai);
92 static int meson_card_set_link_name(struct snd_soc_card *card,
93 struct snd_soc_dai_link *link,
94 struct device_node *node,
97 char *name = devm_kasprintf(card->dev, GFP_KERNEL, "%s.%s",
98 prefix, node->full_name);
103 link->stream_name = name;
108 unsigned int meson_card_parse_daifmt(struct device_node *node,
109 struct device_node *cpu_node)
111 struct device_node *bitclkmaster = NULL;
112 struct device_node *framemaster = NULL;
115 daifmt = snd_soc_daifmt_parse_format(node, NULL);
117 snd_soc_daifmt_parse_clock_provider_as_phandle(node, NULL, &bitclkmaster, &framemaster);
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;
124 daifmt |= (!framemaster || framemaster == cpu_node) ?
125 SND_SOC_DAIFMT_CBM_CFS : SND_SOC_DAIFMT_CBM_CFM;
128 of_node_put(bitclkmaster);
129 of_node_put(framemaster);
133 EXPORT_SYMBOL_GPL(meson_card_parse_daifmt);
135 int meson_card_set_be_link(struct snd_soc_card *card,
136 struct snd_soc_dai_link *link,
137 struct device_node *node)
139 struct snd_soc_dai_link_component *codec;
140 struct device_node *np;
143 num_codecs = of_get_child_count(node);
145 dev_err(card->dev, "be link %s has no codec\n",
150 codec = devm_kcalloc(card->dev, num_codecs, sizeof(*codec), GFP_KERNEL);
154 link->codecs = codec;
155 link->num_codecs = num_codecs;
157 for_each_child_of_node(node, np) {
158 ret = meson_card_parse_dai(card, np, codec);
167 ret = meson_card_set_link_name(card, link, node, "be");
169 dev_err(card->dev, "error setting %pOFn link name\n", np);
173 EXPORT_SYMBOL_GPL(meson_card_set_be_link);
175 int meson_card_set_fe_link(struct snd_soc_card *card,
176 struct snd_soc_dai_link *link,
177 struct device_node *node,
180 link->codecs = &asoc_dummy_dlc;
181 link->num_codecs = 1;
184 link->dpcm_merged_format = 1;
185 link->dpcm_merged_chan = 1;
186 link->dpcm_merged_rate = 1;
189 link->dpcm_playback = 1;
191 link->dpcm_capture = 1;
193 return meson_card_set_link_name(card, link, node, "fe");
195 EXPORT_SYMBOL_GPL(meson_card_set_fe_link);
197 static int meson_card_add_links(struct snd_soc_card *card)
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;
204 num = of_get_child_count(node);
206 dev_err(card->dev, "card has no links\n");
210 ret = meson_card_reallocate_links(card, num);
215 for_each_child_of_node(node, np) {
216 ret = priv->match_data->add_link(card, np, &i);
228 static int meson_card_parse_of_optional(struct snd_soc_card *card,
229 const char *propname,
230 int (*func)(struct snd_soc_card *c,
233 /* If property is not provided, don't fail ... */
234 if (!of_property_read_bool(card->dev->of_node, propname))
237 /* ... but do fail if it is provided and the parsing fails */
238 return func(card, propname);
241 static void meson_card_clean_references(struct meson_card *priv)
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;
249 if (card->dai_link) {
250 for_each_card_prelinks(card, i, link) {
252 of_node_put(link->cpus->of_node);
253 for_each_link_codecs(link, j, codec)
254 of_node_put(codec->of_node);
259 for_each_card_pre_auxs(card, i, aux)
260 of_node_put(aux->dlc.of_node);
263 kfree(card->dai_link);
264 kfree(priv->link_data);
267 int meson_card_probe(struct platform_device *pdev)
269 const struct meson_card_match_data *data;
270 struct device *dev = &pdev->dev;
271 struct meson_card *priv;
274 data = of_device_get_match_data(dev);
276 dev_err(dev, "failed to match device\n");
280 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
284 platform_set_drvdata(pdev, priv);
285 snd_soc_card_set_drvdata(&priv->card, priv);
287 priv->card.owner = THIS_MODULE;
288 priv->card.dev = dev;
289 priv->card.driver_name = dev->driver->name;
290 priv->match_data = data;
292 ret = snd_soc_of_parse_card_name(&priv->card, "model");
296 ret = meson_card_parse_of_optional(&priv->card, "audio-routing",
297 snd_soc_of_parse_audio_routing);
299 dev_err(dev, "error while parsing routing\n");
303 ret = meson_card_parse_of_optional(&priv->card, "audio-widgets",
304 snd_soc_of_parse_audio_simple_widgets);
306 dev_err(dev, "error while parsing widgets\n");
310 ret = meson_card_add_links(&priv->card);
314 ret = snd_soc_of_parse_aux_devs(&priv->card, "audio-aux-devs");
318 ret = devm_snd_soc_register_card(dev, &priv->card);
325 meson_card_clean_references(priv);
328 EXPORT_SYMBOL_GPL(meson_card_probe);
330 int meson_card_remove(struct platform_device *pdev)
332 struct meson_card *priv = platform_get_drvdata(pdev);
334 meson_card_clean_references(priv);
338 EXPORT_SYMBOL_GPL(meson_card_remove);
340 MODULE_DESCRIPTION("Amlogic Sound Card Utils");
341 MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
342 MODULE_LICENSE("GPL v2");