1 // SPDX-License-Identifier: GPL-2.0
2 //
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
meson_card_i2s_set_sysclk(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,unsigned int mclk_fs)12 int 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 = asoc_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(asoc_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 }
40 EXPORT_SYMBOL_GPL(meson_card_i2s_set_sysclk);
41
meson_card_reallocate_links(struct snd_soc_card * card,unsigned int num_links)42 int 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
66 err_ldata:
67 kfree(links);
68 err_links:
69 dev_err(priv->card.dev, "failed to allocate links\n");
70 return -ENOMEM;
71
72 }
73 EXPORT_SYMBOL_GPL(meson_card_reallocate_links);
74
meson_card_parse_dai(struct snd_soc_card * card,struct device_node * node,struct device_node ** dai_of_node,const char ** dai_name)75 int meson_card_parse_dai(struct snd_soc_card *card,
76 struct device_node *node,
77 struct device_node **dai_of_node,
78 const char **dai_name)
79 {
80 struct of_phandle_args args;
81 int ret;
82
83 if (!dai_name || !dai_of_node || !node)
84 return -EINVAL;
85
86 ret = of_parse_phandle_with_args(node, "sound-dai",
87 "#sound-dai-cells", 0, &args);
88 if (ret)
89 return dev_err_probe(card->dev, ret, "can't parse dai\n");
90
91 *dai_of_node = args.np;
92
93 return snd_soc_get_dai_name(&args, dai_name);
94 }
95 EXPORT_SYMBOL_GPL(meson_card_parse_dai);
96
meson_card_set_link_name(struct snd_soc_card * card,struct snd_soc_dai_link * link,struct device_node * node,const char * prefix)97 static int meson_card_set_link_name(struct snd_soc_card *card,
98 struct snd_soc_dai_link *link,
99 struct device_node *node,
100 const char *prefix)
101 {
102 char *name = devm_kasprintf(card->dev, GFP_KERNEL, "%s.%s",
103 prefix, node->full_name);
104 if (!name)
105 return -ENOMEM;
106
107 link->name = name;
108 link->stream_name = name;
109
110 return 0;
111 }
112
meson_card_parse_daifmt(struct device_node * node,struct device_node * cpu_node)113 unsigned int meson_card_parse_daifmt(struct device_node *node,
114 struct device_node *cpu_node)
115 {
116 struct device_node *bitclkmaster = NULL;
117 struct device_node *framemaster = NULL;
118 unsigned int daifmt;
119
120 daifmt = snd_soc_daifmt_parse_format(node, NULL);
121
122 snd_soc_daifmt_parse_clock_provider_as_phandle(node, NULL, &bitclkmaster, &framemaster);
123
124 /* If no master is provided, default to cpu master */
125 if (!bitclkmaster || bitclkmaster == cpu_node) {
126 daifmt |= (!framemaster || framemaster == cpu_node) ?
127 SND_SOC_DAIFMT_CBS_CFS : SND_SOC_DAIFMT_CBS_CFM;
128 } else {
129 daifmt |= (!framemaster || framemaster == cpu_node) ?
130 SND_SOC_DAIFMT_CBM_CFS : SND_SOC_DAIFMT_CBM_CFM;
131 }
132
133 of_node_put(bitclkmaster);
134 of_node_put(framemaster);
135
136 return daifmt;
137 }
138 EXPORT_SYMBOL_GPL(meson_card_parse_daifmt);
139
meson_card_set_be_link(struct snd_soc_card * card,struct snd_soc_dai_link * link,struct device_node * node)140 int meson_card_set_be_link(struct snd_soc_card *card,
141 struct snd_soc_dai_link *link,
142 struct device_node *node)
143 {
144 struct snd_soc_dai_link_component *codec;
145 struct device_node *np;
146 int ret, num_codecs;
147
148 num_codecs = of_get_child_count(node);
149 if (!num_codecs) {
150 dev_err(card->dev, "be link %s has no codec\n",
151 node->full_name);
152 return -EINVAL;
153 }
154
155 codec = devm_kcalloc(card->dev, num_codecs, sizeof(*codec), GFP_KERNEL);
156 if (!codec)
157 return -ENOMEM;
158
159 link->codecs = codec;
160 link->num_codecs = num_codecs;
161
162 for_each_child_of_node(node, np) {
163 ret = meson_card_parse_dai(card, np, &codec->of_node,
164 &codec->dai_name);
165 if (ret) {
166 of_node_put(np);
167 return ret;
168 }
169
170 codec++;
171 }
172
173 ret = meson_card_set_link_name(card, link, node, "be");
174 if (ret)
175 dev_err(card->dev, "error setting %pOFn link name\n", np);
176
177 return ret;
178 }
179 EXPORT_SYMBOL_GPL(meson_card_set_be_link);
180
meson_card_set_fe_link(struct snd_soc_card * card,struct snd_soc_dai_link * link,struct device_node * node,bool is_playback)181 int meson_card_set_fe_link(struct snd_soc_card *card,
182 struct snd_soc_dai_link *link,
183 struct device_node *node,
184 bool is_playback)
185 {
186 struct snd_soc_dai_link_component *codec;
187
188 codec = devm_kzalloc(card->dev, sizeof(*codec), GFP_KERNEL);
189 if (!codec)
190 return -ENOMEM;
191
192 link->codecs = codec;
193 link->num_codecs = 1;
194
195 link->dynamic = 1;
196 link->dpcm_merged_format = 1;
197 link->dpcm_merged_chan = 1;
198 link->dpcm_merged_rate = 1;
199 link->codecs->dai_name = "snd-soc-dummy-dai";
200 link->codecs->name = "snd-soc-dummy";
201
202 if (is_playback)
203 link->dpcm_playback = 1;
204 else
205 link->dpcm_capture = 1;
206
207 return meson_card_set_link_name(card, link, node, "fe");
208 }
209 EXPORT_SYMBOL_GPL(meson_card_set_fe_link);
210
meson_card_add_links(struct snd_soc_card * card)211 static int meson_card_add_links(struct snd_soc_card *card)
212 {
213 struct meson_card *priv = snd_soc_card_get_drvdata(card);
214 struct device_node *node = card->dev->of_node;
215 struct device_node *np;
216 int num, i, ret;
217
218 num = of_get_child_count(node);
219 if (!num) {
220 dev_err(card->dev, "card has no links\n");
221 return -EINVAL;
222 }
223
224 ret = meson_card_reallocate_links(card, num);
225 if (ret)
226 return ret;
227
228 i = 0;
229 for_each_child_of_node(node, np) {
230 ret = priv->match_data->add_link(card, np, &i);
231 if (ret) {
232 of_node_put(np);
233 return ret;
234 }
235
236 i++;
237 }
238
239 return 0;
240 }
241
meson_card_parse_of_optional(struct snd_soc_card * card,const char * propname,int (* func)(struct snd_soc_card * c,const char * p))242 static int meson_card_parse_of_optional(struct snd_soc_card *card,
243 const char *propname,
244 int (*func)(struct snd_soc_card *c,
245 const char *p))
246 {
247 /* If property is not provided, don't fail ... */
248 if (!of_property_read_bool(card->dev->of_node, propname))
249 return 0;
250
251 /* ... but do fail if it is provided and the parsing fails */
252 return func(card, propname);
253 }
254
meson_card_clean_references(struct meson_card * priv)255 static void meson_card_clean_references(struct meson_card *priv)
256 {
257 struct snd_soc_card *card = &priv->card;
258 struct snd_soc_dai_link *link;
259 struct snd_soc_dai_link_component *codec;
260 struct snd_soc_aux_dev *aux;
261 int i, j;
262
263 if (card->dai_link) {
264 for_each_card_prelinks(card, i, link) {
265 if (link->cpus)
266 of_node_put(link->cpus->of_node);
267 for_each_link_codecs(link, j, codec)
268 of_node_put(codec->of_node);
269 }
270 }
271
272 if (card->aux_dev) {
273 for_each_card_pre_auxs(card, i, aux)
274 of_node_put(aux->dlc.of_node);
275 }
276
277 kfree(card->dai_link);
278 kfree(priv->link_data);
279 }
280
meson_card_probe(struct platform_device * pdev)281 int meson_card_probe(struct platform_device *pdev)
282 {
283 const struct meson_card_match_data *data;
284 struct device *dev = &pdev->dev;
285 struct meson_card *priv;
286 int ret;
287
288 data = of_device_get_match_data(dev);
289 if (!data) {
290 dev_err(dev, "failed to match device\n");
291 return -ENODEV;
292 }
293
294 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
295 if (!priv)
296 return -ENOMEM;
297
298 platform_set_drvdata(pdev, priv);
299 snd_soc_card_set_drvdata(&priv->card, priv);
300
301 priv->card.owner = THIS_MODULE;
302 priv->card.dev = dev;
303 priv->card.driver_name = dev->driver->name;
304 priv->match_data = data;
305
306 ret = snd_soc_of_parse_card_name(&priv->card, "model");
307 if (ret < 0)
308 return ret;
309
310 ret = meson_card_parse_of_optional(&priv->card, "audio-routing",
311 snd_soc_of_parse_audio_routing);
312 if (ret) {
313 dev_err(dev, "error while parsing routing\n");
314 return ret;
315 }
316
317 ret = meson_card_parse_of_optional(&priv->card, "audio-widgets",
318 snd_soc_of_parse_audio_simple_widgets);
319 if (ret) {
320 dev_err(dev, "error while parsing widgets\n");
321 return ret;
322 }
323
324 ret = meson_card_add_links(&priv->card);
325 if (ret)
326 goto out_err;
327
328 ret = snd_soc_of_parse_aux_devs(&priv->card, "audio-aux-devs");
329 if (ret)
330 goto out_err;
331
332 ret = devm_snd_soc_register_card(dev, &priv->card);
333 if (ret)
334 goto out_err;
335
336 return 0;
337
338 out_err:
339 meson_card_clean_references(priv);
340 return ret;
341 }
342 EXPORT_SYMBOL_GPL(meson_card_probe);
343
meson_card_remove(struct platform_device * pdev)344 int meson_card_remove(struct platform_device *pdev)
345 {
346 struct meson_card *priv = platform_get_drvdata(pdev);
347
348 meson_card_clean_references(priv);
349
350 return 0;
351 }
352 EXPORT_SYMBOL_GPL(meson_card_remove);
353
354 MODULE_DESCRIPTION("Amlogic Sound Card Utils");
355 MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
356 MODULE_LICENSE("GPL v2");
357