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 if (ret != -EPROBE_DEFER)
90 dev_err(card->dev, "can't parse dai %d\n", ret);
91 return ret;
92 }
93 *dai_of_node = args.np;
94
95 return snd_soc_get_dai_name(&args, dai_name);
96 }
97 EXPORT_SYMBOL_GPL(meson_card_parse_dai);
98
meson_card_set_link_name(struct snd_soc_card * card,struct snd_soc_dai_link * link,struct device_node * node,const char * prefix)99 static int meson_card_set_link_name(struct snd_soc_card *card,
100 struct snd_soc_dai_link *link,
101 struct device_node *node,
102 const char *prefix)
103 {
104 char *name = devm_kasprintf(card->dev, GFP_KERNEL, "%s.%s",
105 prefix, node->full_name);
106 if (!name)
107 return -ENOMEM;
108
109 link->name = name;
110 link->stream_name = name;
111
112 return 0;
113 }
114
meson_card_parse_daifmt(struct device_node * node,struct device_node * cpu_node)115 unsigned int meson_card_parse_daifmt(struct device_node *node,
116 struct device_node *cpu_node)
117 {
118 struct device_node *bitclkmaster = NULL;
119 struct device_node *framemaster = NULL;
120 unsigned int daifmt;
121
122 daifmt = snd_soc_of_parse_daifmt(node, "",
123 &bitclkmaster, &framemaster);
124 daifmt &= ~SND_SOC_DAIFMT_MASTER_MASK;
125
126 /* If no master is provided, default to cpu master */
127 if (!bitclkmaster || bitclkmaster == cpu_node) {
128 daifmt |= (!framemaster || framemaster == cpu_node) ?
129 SND_SOC_DAIFMT_CBS_CFS : SND_SOC_DAIFMT_CBS_CFM;
130 } else {
131 daifmt |= (!framemaster || framemaster == cpu_node) ?
132 SND_SOC_DAIFMT_CBM_CFS : SND_SOC_DAIFMT_CBM_CFM;
133 }
134
135 of_node_put(bitclkmaster);
136 of_node_put(framemaster);
137
138 return daifmt;
139 }
140 EXPORT_SYMBOL_GPL(meson_card_parse_daifmt);
141
meson_card_set_be_link(struct snd_soc_card * card,struct snd_soc_dai_link * link,struct device_node * node)142 int meson_card_set_be_link(struct snd_soc_card *card,
143 struct snd_soc_dai_link *link,
144 struct device_node *node)
145 {
146 struct snd_soc_dai_link_component *codec;
147 struct device_node *np;
148 int ret, num_codecs;
149
150 num_codecs = of_get_child_count(node);
151 if (!num_codecs) {
152 dev_err(card->dev, "be link %s has no codec\n",
153 node->full_name);
154 return -EINVAL;
155 }
156
157 codec = devm_kcalloc(card->dev, num_codecs, sizeof(*codec), GFP_KERNEL);
158 if (!codec)
159 return -ENOMEM;
160
161 link->codecs = codec;
162 link->num_codecs = num_codecs;
163
164 for_each_child_of_node(node, np) {
165 ret = meson_card_parse_dai(card, np, &codec->of_node,
166 &codec->dai_name);
167 if (ret) {
168 of_node_put(np);
169 return ret;
170 }
171
172 codec++;
173 }
174
175 ret = meson_card_set_link_name(card, link, node, "be");
176 if (ret)
177 dev_err(card->dev, "error setting %pOFn link name\n", np);
178
179 return ret;
180 }
181 EXPORT_SYMBOL_GPL(meson_card_set_be_link);
182
meson_card_set_fe_link(struct snd_soc_card * card,struct snd_soc_dai_link * link,struct device_node * node,bool is_playback)183 int meson_card_set_fe_link(struct snd_soc_card *card,
184 struct snd_soc_dai_link *link,
185 struct device_node *node,
186 bool is_playback)
187 {
188 struct snd_soc_dai_link_component *codec;
189
190 codec = devm_kzalloc(card->dev, sizeof(*codec), GFP_KERNEL);
191 if (!codec)
192 return -ENOMEM;
193
194 link->codecs = codec;
195 link->num_codecs = 1;
196
197 link->dynamic = 1;
198 link->dpcm_merged_format = 1;
199 link->dpcm_merged_chan = 1;
200 link->dpcm_merged_rate = 1;
201 link->codecs->dai_name = "snd-soc-dummy-dai";
202 link->codecs->name = "snd-soc-dummy";
203
204 if (is_playback)
205 link->dpcm_playback = 1;
206 else
207 link->dpcm_capture = 1;
208
209 return meson_card_set_link_name(card, link, node, "fe");
210 }
211 EXPORT_SYMBOL_GPL(meson_card_set_fe_link);
212
meson_card_add_links(struct snd_soc_card * card)213 static int meson_card_add_links(struct snd_soc_card *card)
214 {
215 struct meson_card *priv = snd_soc_card_get_drvdata(card);
216 struct device_node *node = card->dev->of_node;
217 struct device_node *np;
218 int num, i, ret;
219
220 num = of_get_child_count(node);
221 if (!num) {
222 dev_err(card->dev, "card has no links\n");
223 return -EINVAL;
224 }
225
226 ret = meson_card_reallocate_links(card, num);
227 if (ret)
228 return ret;
229
230 i = 0;
231 for_each_child_of_node(node, np) {
232 ret = priv->match_data->add_link(card, np, &i);
233 if (ret) {
234 of_node_put(np);
235 return ret;
236 }
237
238 i++;
239 }
240
241 return 0;
242 }
243
meson_card_parse_of_optional(struct snd_soc_card * card,const char * propname,int (* func)(struct snd_soc_card * c,const char * p))244 static int meson_card_parse_of_optional(struct snd_soc_card *card,
245 const char *propname,
246 int (*func)(struct snd_soc_card *c,
247 const char *p))
248 {
249 /* If property is not provided, don't fail ... */
250 if (!of_property_read_bool(card->dev->of_node, propname))
251 return 0;
252
253 /* ... but do fail if it is provided and the parsing fails */
254 return func(card, propname);
255 }
256
meson_card_clean_references(struct meson_card * priv)257 static void meson_card_clean_references(struct meson_card *priv)
258 {
259 struct snd_soc_card *card = &priv->card;
260 struct snd_soc_dai_link *link;
261 struct snd_soc_dai_link_component *codec;
262 struct snd_soc_aux_dev *aux;
263 int i, j;
264
265 if (card->dai_link) {
266 for_each_card_prelinks(card, i, link) {
267 if (link->cpus)
268 of_node_put(link->cpus->of_node);
269 for_each_link_codecs(link, j, codec)
270 of_node_put(codec->of_node);
271 }
272 }
273
274 if (card->aux_dev) {
275 for_each_card_pre_auxs(card, i, aux)
276 of_node_put(aux->dlc.of_node);
277 }
278
279 kfree(card->dai_link);
280 kfree(priv->link_data);
281 }
282
meson_card_probe(struct platform_device * pdev)283 int meson_card_probe(struct platform_device *pdev)
284 {
285 const struct meson_card_match_data *data;
286 struct device *dev = &pdev->dev;
287 struct meson_card *priv;
288 int ret;
289
290 data = of_device_get_match_data(dev);
291 if (!data) {
292 dev_err(dev, "failed to match device\n");
293 return -ENODEV;
294 }
295
296 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
297 if (!priv)
298 return -ENOMEM;
299
300 platform_set_drvdata(pdev, priv);
301 snd_soc_card_set_drvdata(&priv->card, priv);
302
303 priv->card.owner = THIS_MODULE;
304 priv->card.dev = dev;
305 priv->match_data = data;
306
307 ret = snd_soc_of_parse_card_name(&priv->card, "model");
308 if (ret < 0)
309 return ret;
310
311 ret = meson_card_parse_of_optional(&priv->card, "audio-routing",
312 snd_soc_of_parse_audio_routing);
313 if (ret) {
314 dev_err(dev, "error while parsing routing\n");
315 return ret;
316 }
317
318 ret = meson_card_parse_of_optional(&priv->card, "audio-widgets",
319 snd_soc_of_parse_audio_simple_widgets);
320 if (ret) {
321 dev_err(dev, "error while parsing widgets\n");
322 return ret;
323 }
324
325 ret = meson_card_add_links(&priv->card);
326 if (ret)
327 goto out_err;
328
329 ret = snd_soc_of_parse_aux_devs(&priv->card, "audio-aux-devs");
330 if (ret)
331 goto out_err;
332
333 ret = devm_snd_soc_register_card(dev, &priv->card);
334 if (ret)
335 goto out_err;
336
337 return 0;
338
339 out_err:
340 meson_card_clean_references(priv);
341 return ret;
342 }
343 EXPORT_SYMBOL_GPL(meson_card_probe);
344
meson_card_remove(struct platform_device * pdev)345 int meson_card_remove(struct platform_device *pdev)
346 {
347 struct meson_card *priv = platform_get_drvdata(pdev);
348
349 meson_card_clean_references(priv);
350
351 return 0;
352 }
353 EXPORT_SYMBOL_GPL(meson_card_remove);
354
355 MODULE_DESCRIPTION("Amlogic Sound Card Utils");
356 MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
357 MODULE_LICENSE("GPL v2");
358
