1 /*
2 * simple-card-utils.c
3 *
4 * Copyright (c) 2016 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10 #include <linux/clk.h>
11 #include <linux/module.h>
12 #include <linux/of.h>
13 #include <linux/of_graph.h>
14 #include <sound/simple_card_utils.h>
15
asoc_simple_card_convert_fixup(struct asoc_simple_card_data * data,struct snd_pcm_hw_params * params)16 void asoc_simple_card_convert_fixup(struct asoc_simple_card_data *data,
17 struct snd_pcm_hw_params *params)
18 {
19 struct snd_interval *rate = hw_param_interval(params,
20 SNDRV_PCM_HW_PARAM_RATE);
21 struct snd_interval *channels = hw_param_interval(params,
22 SNDRV_PCM_HW_PARAM_CHANNELS);
23
24 if (data->convert_rate)
25 rate->min =
26 rate->max = data->convert_rate;
27
28 if (data->convert_channels)
29 channels->min =
30 channels->max = data->convert_channels;
31 }
32 EXPORT_SYMBOL_GPL(asoc_simple_card_convert_fixup);
33
asoc_simple_card_parse_convert(struct device * dev,char * prefix,struct asoc_simple_card_data * data)34 void asoc_simple_card_parse_convert(struct device *dev, char *prefix,
35 struct asoc_simple_card_data *data)
36 {
37 struct device_node *np = dev->of_node;
38 char prop[128];
39
40 if (!prefix)
41 prefix = "";
42
43 /* sampling rate convert */
44 snprintf(prop, sizeof(prop), "%s%s", prefix, "convert-rate");
45 of_property_read_u32(np, prop, &data->convert_rate);
46
47 /* channels transfer */
48 snprintf(prop, sizeof(prop), "%s%s", prefix, "convert-channels");
49 of_property_read_u32(np, prop, &data->convert_channels);
50
51 dev_dbg(dev, "convert_rate %d\n", data->convert_rate);
52 dev_dbg(dev, "convert_channels %d\n", data->convert_channels);
53 }
54 EXPORT_SYMBOL_GPL(asoc_simple_card_parse_convert);
55
asoc_simple_card_parse_daifmt(struct device * dev,struct device_node * node,struct device_node * codec,char * prefix,unsigned int * retfmt)56 int asoc_simple_card_parse_daifmt(struct device *dev,
57 struct device_node *node,
58 struct device_node *codec,
59 char *prefix,
60 unsigned int *retfmt)
61 {
62 struct device_node *bitclkmaster = NULL;
63 struct device_node *framemaster = NULL;
64 unsigned int daifmt;
65
66 daifmt = snd_soc_of_parse_daifmt(node, prefix,
67 &bitclkmaster, &framemaster);
68 daifmt &= ~SND_SOC_DAIFMT_MASTER_MASK;
69
70 if (!bitclkmaster && !framemaster) {
71 /*
72 * No dai-link level and master setting was not found from
73 * sound node level, revert back to legacy DT parsing and
74 * take the settings from codec node.
75 */
76 dev_dbg(dev, "Revert to legacy daifmt parsing\n");
77
78 daifmt = snd_soc_of_parse_daifmt(codec, NULL, NULL, NULL) |
79 (daifmt & ~SND_SOC_DAIFMT_CLOCK_MASK);
80 } else {
81 if (codec == bitclkmaster)
82 daifmt |= (codec == framemaster) ?
83 SND_SOC_DAIFMT_CBM_CFM : SND_SOC_DAIFMT_CBM_CFS;
84 else
85 daifmt |= (codec == framemaster) ?
86 SND_SOC_DAIFMT_CBS_CFM : SND_SOC_DAIFMT_CBS_CFS;
87 }
88
89 of_node_put(bitclkmaster);
90 of_node_put(framemaster);
91
92 *retfmt = daifmt;
93
94 dev_dbg(dev, "format : %04x\n", daifmt);
95
96 return 0;
97 }
98 EXPORT_SYMBOL_GPL(asoc_simple_card_parse_daifmt);
99
asoc_simple_card_set_dailink_name(struct device * dev,struct snd_soc_dai_link * dai_link,const char * fmt,...)100 int asoc_simple_card_set_dailink_name(struct device *dev,
101 struct snd_soc_dai_link *dai_link,
102 const char *fmt, ...)
103 {
104 va_list ap;
105 char *name = NULL;
106 int ret = -ENOMEM;
107
108 va_start(ap, fmt);
109 name = devm_kvasprintf(dev, GFP_KERNEL, fmt, ap);
110 va_end(ap);
111
112 if (name) {
113 ret = 0;
114
115 dai_link->name = name;
116 dai_link->stream_name = name;
117
118 dev_dbg(dev, "name : %s\n", name);
119 }
120
121 return ret;
122 }
123 EXPORT_SYMBOL_GPL(asoc_simple_card_set_dailink_name);
124
asoc_simple_card_parse_card_name(struct snd_soc_card * card,char * prefix)125 int asoc_simple_card_parse_card_name(struct snd_soc_card *card,
126 char *prefix)
127 {
128 int ret;
129
130 if (!prefix)
131 prefix = "";
132
133 /* Parse the card name from DT */
134 ret = snd_soc_of_parse_card_name(card, "label");
135 if (ret < 0 || !card->name) {
136 char prop[128];
137
138 snprintf(prop, sizeof(prop), "%sname", prefix);
139 ret = snd_soc_of_parse_card_name(card, prop);
140 if (ret < 0)
141 return ret;
142 }
143
144 if (!card->name && card->dai_link)
145 card->name = card->dai_link->name;
146
147 dev_dbg(card->dev, "Card Name: %s\n", card->name ? card->name : "");
148
149 return 0;
150 }
151 EXPORT_SYMBOL_GPL(asoc_simple_card_parse_card_name);
152
asoc_simple_card_clk_register(struct asoc_simple_dai * dai,struct clk * clk)153 static void asoc_simple_card_clk_register(struct asoc_simple_dai *dai,
154 struct clk *clk)
155 {
156 dai->clk = clk;
157 }
158
asoc_simple_card_clk_enable(struct asoc_simple_dai * dai)159 int asoc_simple_card_clk_enable(struct asoc_simple_dai *dai)
160 {
161 return clk_prepare_enable(dai->clk);
162 }
163 EXPORT_SYMBOL_GPL(asoc_simple_card_clk_enable);
164
asoc_simple_card_clk_disable(struct asoc_simple_dai * dai)165 void asoc_simple_card_clk_disable(struct asoc_simple_dai *dai)
166 {
167 clk_disable_unprepare(dai->clk);
168 }
169 EXPORT_SYMBOL_GPL(asoc_simple_card_clk_disable);
170
asoc_simple_card_parse_clk(struct device * dev,struct device_node * node,struct device_node * dai_of_node,struct asoc_simple_dai * simple_dai,const char * name)171 int asoc_simple_card_parse_clk(struct device *dev,
172 struct device_node *node,
173 struct device_node *dai_of_node,
174 struct asoc_simple_dai *simple_dai,
175 const char *name)
176 {
177 struct clk *clk;
178 u32 val;
179
180 /*
181 * Parse dai->sysclk come from "clocks = <&xxx>"
182 * (if system has common clock)
183 * or "system-clock-frequency = <xxx>"
184 * or device's module clock.
185 */
186 clk = devm_get_clk_from_child(dev, node, NULL);
187 if (!IS_ERR(clk)) {
188 simple_dai->sysclk = clk_get_rate(clk);
189
190 asoc_simple_card_clk_register(simple_dai, clk);
191 } else if (!of_property_read_u32(node, "system-clock-frequency", &val)) {
192 simple_dai->sysclk = val;
193 } else {
194 clk = devm_get_clk_from_child(dev, dai_of_node, NULL);
195 if (!IS_ERR(clk))
196 simple_dai->sysclk = clk_get_rate(clk);
197 }
198
199 if (of_property_read_bool(node, "system-clock-direction-out"))
200 simple_dai->clk_direction = SND_SOC_CLOCK_OUT;
201
202 dev_dbg(dev, "%s : sysclk = %d, direction %d\n", name,
203 simple_dai->sysclk, simple_dai->clk_direction);
204
205 return 0;
206 }
207 EXPORT_SYMBOL_GPL(asoc_simple_card_parse_clk);
208
asoc_simple_card_parse_dai(struct device_node * node,struct device_node ** dai_of_node,const char ** dai_name,const char * list_name,const char * cells_name,int * is_single_link)209 int asoc_simple_card_parse_dai(struct device_node *node,
210 struct device_node **dai_of_node,
211 const char **dai_name,
212 const char *list_name,
213 const char *cells_name,
214 int *is_single_link)
215 {
216 struct of_phandle_args args;
217 int ret;
218
219 if (!node)
220 return 0;
221
222 /*
223 * Get node via "sound-dai = <&phandle port>"
224 * it will be used as xxx_of_node on soc_bind_dai_link()
225 */
226 ret = of_parse_phandle_with_args(node, list_name, cells_name, 0, &args);
227 if (ret)
228 return ret;
229
230 /* Get dai->name */
231 if (dai_name) {
232 ret = snd_soc_of_get_dai_name(node, dai_name);
233 if (ret < 0)
234 return ret;
235 }
236
237 *dai_of_node = args.np;
238
239 if (is_single_link)
240 *is_single_link = !args.args_count;
241
242 return 0;
243 }
244 EXPORT_SYMBOL_GPL(asoc_simple_card_parse_dai);
245
asoc_simple_card_get_dai_id(struct device_node * ep)246 static int asoc_simple_card_get_dai_id(struct device_node *ep)
247 {
248 struct device_node *node;
249 struct device_node *endpoint;
250 int i, id;
251 int ret;
252
253 ret = snd_soc_get_dai_id(ep);
254 if (ret != -ENOTSUPP)
255 return ret;
256
257 node = of_graph_get_port_parent(ep);
258
259 /*
260 * Non HDMI sound case, counting port/endpoint on its DT
261 * is enough. Let's count it.
262 */
263 i = 0;
264 id = -1;
265 for_each_endpoint_of_node(node, endpoint) {
266 if (endpoint == ep)
267 id = i;
268 i++;
269 }
270
271 of_node_put(node);
272
273 if (id < 0)
274 return -ENODEV;
275
276 return id;
277 }
278
asoc_simple_card_parse_graph_dai(struct device_node * ep,struct device_node ** dai_of_node,const char ** dai_name)279 int asoc_simple_card_parse_graph_dai(struct device_node *ep,
280 struct device_node **dai_of_node,
281 const char **dai_name)
282 {
283 struct device_node *node;
284 struct of_phandle_args args;
285 int ret;
286
287 if (!ep)
288 return 0;
289 if (!dai_name)
290 return 0;
291
292 node = of_graph_get_port_parent(ep);
293
294 /* Get dai->name */
295 args.np = node;
296 args.args[0] = asoc_simple_card_get_dai_id(ep);
297 args.args_count = (of_graph_get_endpoint_count(node) > 1);
298
299 ret = snd_soc_get_dai_name(&args, dai_name);
300 if (ret < 0)
301 return ret;
302
303 *dai_of_node = node;
304
305 return 0;
306 }
307 EXPORT_SYMBOL_GPL(asoc_simple_card_parse_graph_dai);
308
asoc_simple_card_init_dai(struct snd_soc_dai * dai,struct asoc_simple_dai * simple_dai)309 int asoc_simple_card_init_dai(struct snd_soc_dai *dai,
310 struct asoc_simple_dai *simple_dai)
311 {
312 int ret;
313
314 if (simple_dai->sysclk) {
315 ret = snd_soc_dai_set_sysclk(dai, 0, simple_dai->sysclk,
316 simple_dai->clk_direction);
317 if (ret && ret != -ENOTSUPP) {
318 dev_err(dai->dev, "simple-card: set_sysclk error\n");
319 return ret;
320 }
321 }
322
323 if (simple_dai->slots) {
324 ret = snd_soc_dai_set_tdm_slot(dai,
325 simple_dai->tx_slot_mask,
326 simple_dai->rx_slot_mask,
327 simple_dai->slots,
328 simple_dai->slot_width);
329 if (ret && ret != -ENOTSUPP) {
330 dev_err(dai->dev, "simple-card: set_tdm_slot error\n");
331 return ret;
332 }
333 }
334
335 return 0;
336 }
337 EXPORT_SYMBOL_GPL(asoc_simple_card_init_dai);
338
asoc_simple_card_canonicalize_dailink(struct snd_soc_dai_link * dai_link)339 int asoc_simple_card_canonicalize_dailink(struct snd_soc_dai_link *dai_link)
340 {
341 /* Assumes platform == cpu */
342 if (!dai_link->platform_of_node)
343 dai_link->platform_of_node = dai_link->cpu_of_node;
344
345 return 0;
346 }
347 EXPORT_SYMBOL_GPL(asoc_simple_card_canonicalize_dailink);
348
asoc_simple_card_canonicalize_cpu(struct snd_soc_dai_link * dai_link,int is_single_links)349 void asoc_simple_card_canonicalize_cpu(struct snd_soc_dai_link *dai_link,
350 int is_single_links)
351 {
352 /*
353 * In soc_bind_dai_link() will check cpu name after
354 * of_node matching if dai_link has cpu_dai_name.
355 * but, it will never match if name was created by
356 * fmt_single_name() remove cpu_dai_name if cpu_args
357 * was 0. See:
358 * fmt_single_name()
359 * fmt_multiple_name()
360 */
361 if (is_single_links)
362 dai_link->cpu_dai_name = NULL;
363 }
364 EXPORT_SYMBOL_GPL(asoc_simple_card_canonicalize_cpu);
365
asoc_simple_card_clean_reference(struct snd_soc_card * card)366 int asoc_simple_card_clean_reference(struct snd_soc_card *card)
367 {
368 struct snd_soc_dai_link *dai_link;
369 int num_links;
370
371 for (num_links = 0, dai_link = card->dai_link;
372 num_links < card->num_links;
373 num_links++, dai_link++) {
374 of_node_put(dai_link->cpu_of_node);
375 of_node_put(dai_link->codec_of_node);
376 }
377 return 0;
378 }
379 EXPORT_SYMBOL_GPL(asoc_simple_card_clean_reference);
380
asoc_simple_card_of_parse_routing(struct snd_soc_card * card,char * prefix,int optional)381 int asoc_simple_card_of_parse_routing(struct snd_soc_card *card,
382 char *prefix,
383 int optional)
384 {
385 struct device_node *node = card->dev->of_node;
386 char prop[128];
387
388 if (!prefix)
389 prefix = "";
390
391 snprintf(prop, sizeof(prop), "%s%s", prefix, "routing");
392
393 if (!of_property_read_bool(node, prop)) {
394 if (optional)
395 return 0;
396 return -EINVAL;
397 }
398
399 return snd_soc_of_parse_audio_routing(card, prop);
400 }
401 EXPORT_SYMBOL_GPL(asoc_simple_card_of_parse_routing);
402
asoc_simple_card_of_parse_widgets(struct snd_soc_card * card,char * prefix)403 int asoc_simple_card_of_parse_widgets(struct snd_soc_card *card,
404 char *prefix)
405 {
406 struct device_node *node = card->dev->of_node;
407 char prop[128];
408
409 if (!prefix)
410 prefix = "";
411
412 snprintf(prop, sizeof(prop), "%s%s", prefix, "widgets");
413
414 if (of_property_read_bool(node, prop))
415 return snd_soc_of_parse_audio_simple_widgets(card, prop);
416
417 /* no widgets is not error */
418 return 0;
419 }
420 EXPORT_SYMBOL_GPL(asoc_simple_card_of_parse_widgets);
421
422 /* Module information */
423 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
424 MODULE_DESCRIPTION("ALSA SoC Simple Card Utils");
425 MODULE_LICENSE("GPL v2");
426