1 // SPDX-License-Identifier: GPL-2.0
2 //
3 // simple-card-utils.c
4 //
5 // Copyright (c) 2016 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
6
7 #include <dt-bindings/sound/audio-graph.h>
8 #include <linux/cleanup.h>
9 #include <linux/clk.h>
10 #include <linux/gpio/consumer.h>
11 #include <linux/module.h>
12 #include <linux/of.h>
13 #include <linux/of_graph.h>
14 #include <sound/jack.h>
15 #include <sound/pcm_params.h>
16 #include <sound/simple_card_utils.h>
17
simple_util_get_sample_fmt(struct simple_util_data * data)18 int simple_util_get_sample_fmt(struct simple_util_data *data)
19 {
20 int i;
21 int val = -EINVAL;
22
23 struct {
24 char *fmt;
25 u32 val;
26 } of_sample_fmt_table[] = {
27 { "s8", SNDRV_PCM_FORMAT_S8},
28 { "s16_le", SNDRV_PCM_FORMAT_S16_LE},
29 { "s24_le", SNDRV_PCM_FORMAT_S24_LE},
30 { "s24_3le", SNDRV_PCM_FORMAT_S24_3LE},
31 { "s32_le", SNDRV_PCM_FORMAT_S32_LE},
32 };
33
34 for (i = 0; i < ARRAY_SIZE(of_sample_fmt_table); i++) {
35 if (!strcmp(data->convert_sample_format,
36 of_sample_fmt_table[i].fmt)) {
37 val = of_sample_fmt_table[i].val;
38 break;
39 }
40 }
41 return val;
42 }
43 EXPORT_SYMBOL_GPL(simple_util_get_sample_fmt);
44
simple_fixup_sample_fmt(struct simple_util_data * data,struct snd_pcm_hw_params * params)45 static void simple_fixup_sample_fmt(struct simple_util_data *data,
46 struct snd_pcm_hw_params *params)
47 {
48 int val;
49 struct snd_mask *mask = hw_param_mask(params,
50 SNDRV_PCM_HW_PARAM_FORMAT);
51
52 val = simple_util_get_sample_fmt(data);
53 if (val >= 0) {
54 snd_mask_none(mask);
55 snd_mask_set(mask, val);
56 }
57 }
58
simple_util_parse_convert(struct device_node * np,char * prefix,struct simple_util_data * data)59 void simple_util_parse_convert(struct device_node *np,
60 char *prefix,
61 struct simple_util_data *data)
62 {
63 char prop[128];
64
65 if (!np)
66 return;
67
68 if (!prefix)
69 prefix = "";
70
71 /* sampling rate convert */
72 snprintf(prop, sizeof(prop), "%s%s", prefix, "convert-rate");
73 of_property_read_u32(np, prop, &data->convert_rate);
74
75 /* channels transfer */
76 snprintf(prop, sizeof(prop), "%s%s", prefix, "convert-channels");
77 of_property_read_u32(np, prop, &data->convert_channels);
78
79 /* convert sample format */
80 snprintf(prop, sizeof(prop), "%s%s", prefix, "convert-sample-format");
81 of_property_read_string(np, prop, &data->convert_sample_format);
82 }
83 EXPORT_SYMBOL_GPL(simple_util_parse_convert);
84
85 /**
86 * simple_util_is_convert_required() - Query if HW param conversion was requested
87 * @data: Link data.
88 *
89 * Returns true if any HW param conversion was requested for this DAI link with
90 * any "convert-xxx" properties.
91 */
simple_util_is_convert_required(const struct simple_util_data * data)92 bool simple_util_is_convert_required(const struct simple_util_data *data)
93 {
94 return data->convert_rate ||
95 data->convert_channels ||
96 data->convert_sample_format;
97 }
98 EXPORT_SYMBOL_GPL(simple_util_is_convert_required);
99
simple_util_parse_daifmt(struct device * dev,struct device_node * node,struct device_node * codec,char * prefix,unsigned int * retfmt)100 int simple_util_parse_daifmt(struct device *dev,
101 struct device_node *node,
102 struct device_node *codec,
103 char *prefix,
104 unsigned int *retfmt)
105 {
106 struct device_node *bitclkmaster = NULL;
107 struct device_node *framemaster = NULL;
108 unsigned int daifmt;
109
110 daifmt = snd_soc_daifmt_parse_format(node, prefix);
111
112 snd_soc_daifmt_parse_clock_provider_as_phandle(node, prefix, &bitclkmaster, &framemaster);
113 if (!bitclkmaster && !framemaster) {
114 /*
115 * No dai-link level and master setting was not found from
116 * sound node level, revert back to legacy DT parsing and
117 * take the settings from codec node.
118 */
119 dev_dbg(dev, "Revert to legacy daifmt parsing\n");
120
121 daifmt |= snd_soc_daifmt_parse_clock_provider_as_flag(codec, NULL);
122 } else {
123 daifmt |= snd_soc_daifmt_clock_provider_from_bitmap(
124 ((codec == bitclkmaster) << 4) | (codec == framemaster));
125 }
126
127 of_node_put(bitclkmaster);
128 of_node_put(framemaster);
129
130 *retfmt = daifmt;
131
132 return 0;
133 }
134 EXPORT_SYMBOL_GPL(simple_util_parse_daifmt);
135
simple_util_parse_tdm_width_map(struct device * dev,struct device_node * np,struct simple_util_dai * dai)136 int simple_util_parse_tdm_width_map(struct device *dev, struct device_node *np,
137 struct simple_util_dai *dai)
138 {
139 int n, i, ret;
140 u32 *p;
141
142 if (!of_property_read_bool(np, "dai-tdm-slot-width-map"))
143 return 0;
144
145 n = of_property_count_elems_of_size(np, "dai-tdm-slot-width-map", sizeof(u32));
146 if (n % 3) {
147 dev_err(dev, "Invalid number of cells for dai-tdm-slot-width-map\n");
148 return -EINVAL;
149 }
150
151 dai->tdm_width_map = devm_kcalloc(dev, n, sizeof(*dai->tdm_width_map), GFP_KERNEL);
152 if (!dai->tdm_width_map)
153 return -ENOMEM;
154
155 u32 *array_values __free(kfree) = kcalloc(n, sizeof(*array_values),
156 GFP_KERNEL);
157 if (!array_values)
158 return -ENOMEM;
159
160 ret = of_property_read_u32_array(np, "dai-tdm-slot-width-map", array_values, n);
161 if (ret < 0) {
162 dev_err(dev, "Could not read dai-tdm-slot-width-map: %d\n", ret);
163 return ret;
164 }
165
166 p = array_values;
167 for (i = 0; i < n / 3; ++i) {
168 dai->tdm_width_map[i].sample_bits = *p++;
169 dai->tdm_width_map[i].slot_width = *p++;
170 dai->tdm_width_map[i].slot_count = *p++;
171 }
172
173 dai->n_tdm_widths = i;
174
175 return 0;
176 }
177 EXPORT_SYMBOL_GPL(simple_util_parse_tdm_width_map);
178
simple_util_set_dailink_name(struct device * dev,struct snd_soc_dai_link * dai_link,const char * fmt,...)179 int simple_util_set_dailink_name(struct device *dev,
180 struct snd_soc_dai_link *dai_link,
181 const char *fmt, ...)
182 {
183 va_list ap;
184 char *name = NULL;
185 int ret = -ENOMEM;
186
187 va_start(ap, fmt);
188 name = devm_kvasprintf(dev, GFP_KERNEL, fmt, ap);
189 va_end(ap);
190
191 if (name) {
192 ret = 0;
193
194 dai_link->name = name;
195 dai_link->stream_name = name;
196 }
197
198 return ret;
199 }
200 EXPORT_SYMBOL_GPL(simple_util_set_dailink_name);
201
simple_util_parse_card_name(struct snd_soc_card * card,char * prefix)202 int simple_util_parse_card_name(struct snd_soc_card *card,
203 char *prefix)
204 {
205 int ret;
206
207 if (!prefix)
208 prefix = "";
209
210 /* Parse the card name from DT */
211 ret = snd_soc_of_parse_card_name(card, "label");
212 if (ret < 0 || !card->name) {
213 char prop[128];
214
215 snprintf(prop, sizeof(prop), "%sname", prefix);
216 ret = snd_soc_of_parse_card_name(card, prop);
217 if (ret < 0)
218 return ret;
219 }
220
221 if (!card->name && card->dai_link)
222 card->name = card->dai_link->name;
223
224 return 0;
225 }
226 EXPORT_SYMBOL_GPL(simple_util_parse_card_name);
227
simple_clk_enable(struct simple_util_dai * dai)228 static int simple_clk_enable(struct simple_util_dai *dai)
229 {
230 if (dai)
231 return clk_prepare_enable(dai->clk);
232
233 return 0;
234 }
235
simple_clk_disable(struct simple_util_dai * dai)236 static void simple_clk_disable(struct simple_util_dai *dai)
237 {
238 if (dai)
239 clk_disable_unprepare(dai->clk);
240 }
241
simple_util_parse_clk(struct device * dev,struct device_node * node,struct simple_util_dai * simple_dai,struct snd_soc_dai_link_component * dlc)242 int simple_util_parse_clk(struct device *dev,
243 struct device_node *node,
244 struct simple_util_dai *simple_dai,
245 struct snd_soc_dai_link_component *dlc)
246 {
247 struct clk *clk;
248 u32 val;
249
250 /*
251 * Parse dai->sysclk come from "clocks = <&xxx>"
252 * (if system has common clock)
253 * or "system-clock-frequency = <xxx>"
254 * or device's module clock.
255 */
256 clk = devm_get_clk_from_child(dev, node, NULL);
257 simple_dai->clk_fixed = of_property_read_bool(
258 node, "system-clock-fixed");
259 if (!IS_ERR(clk)) {
260 simple_dai->sysclk = clk_get_rate(clk);
261
262 simple_dai->clk = clk;
263 } else if (!of_property_read_u32(node, "system-clock-frequency", &val)) {
264 simple_dai->sysclk = val;
265 simple_dai->clk_fixed = true;
266 } else {
267 clk = devm_get_clk_from_child(dev, dlc->of_node, NULL);
268 if (!IS_ERR(clk))
269 simple_dai->sysclk = clk_get_rate(clk);
270 }
271
272 if (of_property_read_bool(node, "system-clock-direction-out"))
273 simple_dai->clk_direction = SND_SOC_CLOCK_OUT;
274
275 return 0;
276 }
277 EXPORT_SYMBOL_GPL(simple_util_parse_clk);
278
simple_check_fixed_sysclk(struct device * dev,struct simple_util_dai * dai,unsigned int * fixed_sysclk)279 static int simple_check_fixed_sysclk(struct device *dev,
280 struct simple_util_dai *dai,
281 unsigned int *fixed_sysclk)
282 {
283 if (dai->clk_fixed) {
284 if (*fixed_sysclk && *fixed_sysclk != dai->sysclk) {
285 dev_err(dev, "inconsistent fixed sysclk rates (%u vs %u)\n",
286 *fixed_sysclk, dai->sysclk);
287 return -EINVAL;
288 }
289 *fixed_sysclk = dai->sysclk;
290 }
291
292 return 0;
293 }
294
simple_util_startup(struct snd_pcm_substream * substream)295 int simple_util_startup(struct snd_pcm_substream *substream)
296 {
297 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
298 struct simple_util_priv *priv = snd_soc_card_get_drvdata(rtd->card);
299 struct simple_dai_props *props = simple_priv_to_props(priv, rtd->num);
300 struct simple_util_dai *dai;
301 unsigned int fixed_sysclk = 0;
302 int i1, i2, i;
303 int ret;
304
305 for_each_prop_dai_cpu(props, i1, dai) {
306 ret = simple_clk_enable(dai);
307 if (ret)
308 goto cpu_err;
309 ret = simple_check_fixed_sysclk(rtd->dev, dai, &fixed_sysclk);
310 if (ret)
311 goto cpu_err;
312 }
313
314 for_each_prop_dai_codec(props, i2, dai) {
315 ret = simple_clk_enable(dai);
316 if (ret)
317 goto codec_err;
318 ret = simple_check_fixed_sysclk(rtd->dev, dai, &fixed_sysclk);
319 if (ret)
320 goto codec_err;
321 }
322
323 if (fixed_sysclk && props->mclk_fs) {
324 unsigned int fixed_rate = fixed_sysclk / props->mclk_fs;
325
326 if (fixed_sysclk % props->mclk_fs) {
327 dev_err(rtd->dev, "fixed sysclk %u not divisible by mclk_fs %u\n",
328 fixed_sysclk, props->mclk_fs);
329 ret = -EINVAL;
330 goto codec_err;
331 }
332 ret = snd_pcm_hw_constraint_minmax(substream->runtime, SNDRV_PCM_HW_PARAM_RATE,
333 fixed_rate, fixed_rate);
334 if (ret < 0)
335 goto codec_err;
336 }
337
338 return 0;
339
340 codec_err:
341 for_each_prop_dai_codec(props, i, dai) {
342 if (i >= i2)
343 break;
344 simple_clk_disable(dai);
345 }
346 cpu_err:
347 for_each_prop_dai_cpu(props, i, dai) {
348 if (i >= i1)
349 break;
350 simple_clk_disable(dai);
351 }
352 return ret;
353 }
354 EXPORT_SYMBOL_GPL(simple_util_startup);
355
simple_util_shutdown(struct snd_pcm_substream * substream)356 void simple_util_shutdown(struct snd_pcm_substream *substream)
357 {
358 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
359 struct simple_util_priv *priv = snd_soc_card_get_drvdata(rtd->card);
360 struct simple_dai_props *props = simple_priv_to_props(priv, rtd->num);
361 struct simple_util_dai *dai;
362 int i;
363
364 for_each_prop_dai_cpu(props, i, dai) {
365 struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, i);
366
367 if (props->mclk_fs && !dai->clk_fixed && !snd_soc_dai_active(cpu_dai))
368 snd_soc_dai_set_sysclk(cpu_dai,
369 0, 0, SND_SOC_CLOCK_OUT);
370
371 simple_clk_disable(dai);
372 }
373 for_each_prop_dai_codec(props, i, dai) {
374 struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, i);
375
376 if (props->mclk_fs && !dai->clk_fixed && !snd_soc_dai_active(codec_dai))
377 snd_soc_dai_set_sysclk(codec_dai,
378 0, 0, SND_SOC_CLOCK_IN);
379
380 simple_clk_disable(dai);
381 }
382 }
383 EXPORT_SYMBOL_GPL(simple_util_shutdown);
384
simple_set_clk_rate(struct device * dev,struct simple_util_dai * simple_dai,unsigned long rate)385 static int simple_set_clk_rate(struct device *dev,
386 struct simple_util_dai *simple_dai,
387 unsigned long rate)
388 {
389 if (!simple_dai)
390 return 0;
391
392 if (simple_dai->clk_fixed && rate != simple_dai->sysclk) {
393 dev_err(dev, "dai %s invalid clock rate %lu\n", simple_dai->name, rate);
394 return -EINVAL;
395 }
396
397 if (!simple_dai->clk)
398 return 0;
399
400 if (clk_get_rate(simple_dai->clk) == rate)
401 return 0;
402
403 return clk_set_rate(simple_dai->clk, rate);
404 }
405
simple_set_tdm(struct snd_soc_dai * dai,struct simple_util_dai * simple_dai,struct snd_pcm_hw_params * params)406 static int simple_set_tdm(struct snd_soc_dai *dai,
407 struct simple_util_dai *simple_dai,
408 struct snd_pcm_hw_params *params)
409 {
410 int sample_bits = params_width(params);
411 int slot_width, slot_count;
412 int i, ret;
413
414 if (!simple_dai || !simple_dai->tdm_width_map)
415 return 0;
416
417 slot_width = simple_dai->slot_width;
418 slot_count = simple_dai->slots;
419
420 if (slot_width == 0)
421 slot_width = sample_bits;
422
423 for (i = 0; i < simple_dai->n_tdm_widths; ++i) {
424 if (simple_dai->tdm_width_map[i].sample_bits == sample_bits) {
425 slot_width = simple_dai->tdm_width_map[i].slot_width;
426 slot_count = simple_dai->tdm_width_map[i].slot_count;
427 break;
428 }
429 }
430
431 ret = snd_soc_dai_set_tdm_slot(dai,
432 simple_dai->tx_slot_mask,
433 simple_dai->rx_slot_mask,
434 slot_count,
435 slot_width);
436 if (ret && ret != -ENOTSUPP) {
437 dev_err(dai->dev, "simple-card: set_tdm_slot error: %d\n", ret);
438 return ret;
439 }
440
441 return 0;
442 }
443
simple_util_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)444 int simple_util_hw_params(struct snd_pcm_substream *substream,
445 struct snd_pcm_hw_params *params)
446 {
447 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
448 struct simple_util_dai *pdai;
449 struct snd_soc_dai *sdai;
450 struct simple_util_priv *priv = snd_soc_card_get_drvdata(rtd->card);
451 struct simple_dai_props *props = simple_priv_to_props(priv, rtd->num);
452 unsigned int mclk, mclk_fs = 0;
453 int i, ret;
454
455 if (props->mclk_fs)
456 mclk_fs = props->mclk_fs;
457
458 if (mclk_fs) {
459 struct snd_soc_component *component;
460 mclk = params_rate(params) * mclk_fs;
461
462 for_each_prop_dai_codec(props, i, pdai) {
463 ret = simple_set_clk_rate(rtd->dev, pdai, mclk);
464 if (ret < 0)
465 return ret;
466 }
467
468 for_each_prop_dai_cpu(props, i, pdai) {
469 ret = simple_set_clk_rate(rtd->dev, pdai, mclk);
470 if (ret < 0)
471 return ret;
472 }
473
474 /* Ensure sysclk is set on all components in case any
475 * (such as platform components) are missed by calls to
476 * snd_soc_dai_set_sysclk.
477 */
478 for_each_rtd_components(rtd, i, component) {
479 ret = snd_soc_component_set_sysclk(component, 0, 0,
480 mclk, SND_SOC_CLOCK_IN);
481 if (ret && ret != -ENOTSUPP)
482 return ret;
483 }
484
485 for_each_rtd_codec_dais(rtd, i, sdai) {
486 ret = snd_soc_dai_set_sysclk(sdai, 0, mclk, SND_SOC_CLOCK_IN);
487 if (ret && ret != -ENOTSUPP)
488 return ret;
489 }
490
491 for_each_rtd_cpu_dais(rtd, i, sdai) {
492 ret = snd_soc_dai_set_sysclk(sdai, 0, mclk, SND_SOC_CLOCK_OUT);
493 if (ret && ret != -ENOTSUPP)
494 return ret;
495 }
496 }
497
498 for_each_prop_dai_codec(props, i, pdai) {
499 sdai = snd_soc_rtd_to_codec(rtd, i);
500 ret = simple_set_tdm(sdai, pdai, params);
501 if (ret < 0)
502 return ret;
503 }
504
505 for_each_prop_dai_cpu(props, i, pdai) {
506 sdai = snd_soc_rtd_to_cpu(rtd, i);
507 ret = simple_set_tdm(sdai, pdai, params);
508 if (ret < 0)
509 return ret;
510 }
511
512 return 0;
513 }
514 EXPORT_SYMBOL_GPL(simple_util_hw_params);
515
simple_util_be_hw_params_fixup(struct snd_soc_pcm_runtime * rtd,struct snd_pcm_hw_params * params)516 int simple_util_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
517 struct snd_pcm_hw_params *params)
518 {
519 struct simple_util_priv *priv = snd_soc_card_get_drvdata(rtd->card);
520 struct simple_dai_props *dai_props = simple_priv_to_props(priv, rtd->num);
521 struct simple_util_data *data = &dai_props->adata;
522 struct snd_interval *rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
523 struct snd_interval *channels = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
524
525 if (data->convert_rate)
526 rate->min =
527 rate->max = data->convert_rate;
528
529 if (data->convert_channels)
530 channels->min =
531 channels->max = data->convert_channels;
532
533 if (data->convert_sample_format)
534 simple_fixup_sample_fmt(data, params);
535
536 return 0;
537 }
538 EXPORT_SYMBOL_GPL(simple_util_be_hw_params_fixup);
539
simple_init_dai(struct snd_soc_dai * dai,struct simple_util_dai * simple_dai)540 static int simple_init_dai(struct snd_soc_dai *dai, struct simple_util_dai *simple_dai)
541 {
542 int ret;
543
544 if (!simple_dai)
545 return 0;
546
547 if (simple_dai->sysclk) {
548 ret = snd_soc_dai_set_sysclk(dai, 0, simple_dai->sysclk,
549 simple_dai->clk_direction);
550 if (ret && ret != -ENOTSUPP) {
551 dev_err(dai->dev, "simple-card: set_sysclk error\n");
552 return ret;
553 }
554 }
555
556 if (simple_dai->slots) {
557 ret = snd_soc_dai_set_tdm_slot(dai,
558 simple_dai->tx_slot_mask,
559 simple_dai->rx_slot_mask,
560 simple_dai->slots,
561 simple_dai->slot_width);
562 if (ret && ret != -ENOTSUPP) {
563 dev_err(dai->dev, "simple-card: set_tdm_slot error\n");
564 return ret;
565 }
566 }
567
568 return 0;
569 }
570
simple_component_is_codec(struct snd_soc_component * component)571 static inline int simple_component_is_codec(struct snd_soc_component *component)
572 {
573 return component->driver->endianness;
574 }
575
simple_init_for_codec2codec(struct snd_soc_pcm_runtime * rtd,struct simple_dai_props * dai_props)576 static int simple_init_for_codec2codec(struct snd_soc_pcm_runtime *rtd,
577 struct simple_dai_props *dai_props)
578 {
579 struct snd_soc_dai_link *dai_link = rtd->dai_link;
580 struct snd_soc_component *component;
581 struct snd_soc_pcm_stream *c2c_params;
582 struct snd_pcm_hardware hw;
583 int i, ret, stream;
584
585 /* Do nothing if it already has Codec2Codec settings */
586 if (dai_link->c2c_params)
587 return 0;
588
589 /* Do nothing if it was DPCM :: BE */
590 if (dai_link->no_pcm)
591 return 0;
592
593 /* Only Codecs */
594 for_each_rtd_components(rtd, i, component) {
595 if (!simple_component_is_codec(component))
596 return 0;
597 }
598
599 /* Assumes the capabilities are the same for all supported streams */
600 for_each_pcm_streams(stream) {
601 ret = snd_soc_runtime_calc_hw(rtd, &hw, stream);
602 if (ret == 0)
603 break;
604 }
605
606 if (ret < 0) {
607 dev_err(rtd->dev, "simple-card: no valid dai_link params\n");
608 return ret;
609 }
610
611 c2c_params = devm_kzalloc(rtd->dev, sizeof(*c2c_params), GFP_KERNEL);
612 if (!c2c_params)
613 return -ENOMEM;
614
615 c2c_params->formats = hw.formats;
616 c2c_params->rates = hw.rates;
617 c2c_params->rate_min = hw.rate_min;
618 c2c_params->rate_max = hw.rate_max;
619 c2c_params->channels_min = hw.channels_min;
620 c2c_params->channels_max = hw.channels_max;
621
622 dai_link->c2c_params = c2c_params;
623 dai_link->num_c2c_params = 1;
624
625 return 0;
626 }
627
simple_util_dai_init(struct snd_soc_pcm_runtime * rtd)628 int simple_util_dai_init(struct snd_soc_pcm_runtime *rtd)
629 {
630 struct simple_util_priv *priv = snd_soc_card_get_drvdata(rtd->card);
631 struct simple_dai_props *props = simple_priv_to_props(priv, rtd->num);
632 struct simple_util_dai *dai;
633 int i, ret;
634
635 for_each_prop_dai_codec(props, i, dai) {
636 ret = simple_init_dai(snd_soc_rtd_to_codec(rtd, i), dai);
637 if (ret < 0)
638 return ret;
639 }
640 for_each_prop_dai_cpu(props, i, dai) {
641 ret = simple_init_dai(snd_soc_rtd_to_cpu(rtd, i), dai);
642 if (ret < 0)
643 return ret;
644 }
645
646 ret = simple_init_for_codec2codec(rtd, props);
647 if (ret < 0)
648 return ret;
649
650 return 0;
651 }
652 EXPORT_SYMBOL_GPL(simple_util_dai_init);
653
simple_util_canonicalize_platform(struct snd_soc_dai_link_component * platforms,struct snd_soc_dai_link_component * cpus)654 void simple_util_canonicalize_platform(struct snd_soc_dai_link_component *platforms,
655 struct snd_soc_dai_link_component *cpus)
656 {
657 /*
658 * Assumes Platform == CPU
659 *
660 * Some CPU might be using soc-generic-dmaengine-pcm. This means CPU and Platform
661 * are different Component, but are sharing same component->dev.
662 *
663 * Let's assume Platform is same as CPU if it doesn't identify Platform on DT.
664 * see
665 * simple-card.c :: simple_count_noml()
666 */
667 if (!platforms->of_node)
668 snd_soc_dlc_use_cpu_as_platform(platforms, cpus);
669 }
670 EXPORT_SYMBOL_GPL(simple_util_canonicalize_platform);
671
simple_util_canonicalize_cpu(struct snd_soc_dai_link_component * cpus,int is_single_links)672 void simple_util_canonicalize_cpu(struct snd_soc_dai_link_component *cpus,
673 int is_single_links)
674 {
675 /*
676 * In soc_bind_dai_link() will check cpu name after
677 * of_node matching if dai_link has cpu_dai_name.
678 * but, it will never match if name was created by
679 * fmt_single_name() remove cpu_dai_name if cpu_args
680 * was 0. See:
681 * fmt_single_name()
682 * fmt_multiple_name()
683 */
684 if (is_single_links)
685 cpus->dai_name = NULL;
686 }
687 EXPORT_SYMBOL_GPL(simple_util_canonicalize_cpu);
688
simple_util_clean_reference(struct snd_soc_card * card)689 void simple_util_clean_reference(struct snd_soc_card *card)
690 {
691 struct snd_soc_dai_link *dai_link;
692 struct snd_soc_dai_link_component *cpu;
693 struct snd_soc_dai_link_component *codec;
694 int i, j;
695
696 for_each_card_prelinks(card, i, dai_link) {
697 for_each_link_cpus(dai_link, j, cpu)
698 of_node_put(cpu->of_node);
699 for_each_link_codecs(dai_link, j, codec)
700 of_node_put(codec->of_node);
701 }
702 }
703 EXPORT_SYMBOL_GPL(simple_util_clean_reference);
704
simple_util_parse_routing(struct snd_soc_card * card,char * prefix)705 int simple_util_parse_routing(struct snd_soc_card *card,
706 char *prefix)
707 {
708 struct device_node *node = card->dev->of_node;
709 char prop[128];
710
711 if (!prefix)
712 prefix = "";
713
714 snprintf(prop, sizeof(prop), "%s%s", prefix, "routing");
715
716 if (!of_property_read_bool(node, prop))
717 return 0;
718
719 return snd_soc_of_parse_audio_routing(card, prop);
720 }
721 EXPORT_SYMBOL_GPL(simple_util_parse_routing);
722
simple_util_parse_widgets(struct snd_soc_card * card,char * prefix)723 int simple_util_parse_widgets(struct snd_soc_card *card,
724 char *prefix)
725 {
726 struct device_node *node = card->dev->of_node;
727 char prop[128];
728
729 if (!prefix)
730 prefix = "";
731
732 snprintf(prop, sizeof(prop), "%s%s", prefix, "widgets");
733
734 if (of_property_read_bool(node, prop))
735 return snd_soc_of_parse_audio_simple_widgets(card, prop);
736
737 /* no widgets is not error */
738 return 0;
739 }
740 EXPORT_SYMBOL_GPL(simple_util_parse_widgets);
741
simple_util_parse_pin_switches(struct snd_soc_card * card,char * prefix)742 int simple_util_parse_pin_switches(struct snd_soc_card *card,
743 char *prefix)
744 {
745 char prop[128];
746
747 if (!prefix)
748 prefix = "";
749
750 snprintf(prop, sizeof(prop), "%s%s", prefix, "pin-switches");
751
752 return snd_soc_of_parse_pin_switches(card, prop);
753 }
754 EXPORT_SYMBOL_GPL(simple_util_parse_pin_switches);
755
simple_util_init_jack(struct snd_soc_card * card,struct simple_util_jack * sjack,int is_hp,char * prefix,char * pin)756 int simple_util_init_jack(struct snd_soc_card *card,
757 struct simple_util_jack *sjack,
758 int is_hp, char *prefix,
759 char *pin)
760 {
761 struct device *dev = card->dev;
762 struct gpio_desc *desc;
763 char prop[128];
764 char *pin_name;
765 char *gpio_name;
766 int mask;
767 int error;
768
769 if (!prefix)
770 prefix = "";
771
772 if (is_hp) {
773 snprintf(prop, sizeof(prop), "%shp-det", prefix);
774 pin_name = pin ? pin : "Headphones";
775 gpio_name = "Headphone detection";
776 mask = SND_JACK_HEADPHONE;
777 } else {
778 snprintf(prop, sizeof(prop), "%smic-det", prefix);
779 pin_name = pin ? pin : "Mic Jack";
780 gpio_name = "Mic detection";
781 mask = SND_JACK_MICROPHONE;
782 }
783
784 desc = gpiod_get_optional(dev, prop, GPIOD_IN);
785 error = PTR_ERR_OR_ZERO(desc);
786 if (error)
787 return error;
788
789 if (desc) {
790 error = gpiod_set_consumer_name(desc, gpio_name);
791 if (error)
792 return error;
793
794 sjack->pin.pin = pin_name;
795 sjack->pin.mask = mask;
796
797 sjack->gpio.name = gpio_name;
798 sjack->gpio.report = mask;
799 sjack->gpio.desc = desc;
800 sjack->gpio.debounce_time = 150;
801
802 snd_soc_card_jack_new_pins(card, pin_name, mask, &sjack->jack,
803 &sjack->pin, 1);
804
805 snd_soc_jack_add_gpios(&sjack->jack, 1, &sjack->gpio);
806 }
807
808 return 0;
809 }
810 EXPORT_SYMBOL_GPL(simple_util_init_jack);
811
simple_util_init_aux_jacks(struct simple_util_priv * priv,char * prefix)812 int simple_util_init_aux_jacks(struct simple_util_priv *priv, char *prefix)
813 {
814 struct snd_soc_card *card = simple_priv_to_card(priv);
815 struct snd_soc_component *component;
816 int found_jack_index = 0;
817 int type = 0;
818 int num = 0;
819 int ret;
820
821 if (priv->aux_jacks)
822 return 0;
823
824 for_each_card_auxs(card, component) {
825 type = snd_soc_component_get_jack_type(component);
826 if (type > 0)
827 num++;
828 }
829 if (num < 1)
830 return 0;
831
832 priv->aux_jacks = devm_kcalloc(card->dev, num,
833 sizeof(struct snd_soc_jack), GFP_KERNEL);
834 if (!priv->aux_jacks)
835 return -ENOMEM;
836
837 for_each_card_auxs(card, component) {
838 char id[128];
839 struct snd_soc_jack *jack;
840
841 if (found_jack_index >= num)
842 break;
843
844 type = snd_soc_component_get_jack_type(component);
845 if (type <= 0)
846 continue;
847
848 /* create jack */
849 jack = &(priv->aux_jacks[found_jack_index++]);
850 snprintf(id, sizeof(id), "%s-jack", component->name);
851 ret = snd_soc_card_jack_new(card, id, type, jack);
852 if (ret)
853 continue;
854
855 (void)snd_soc_component_set_jack(component, jack, NULL);
856 }
857 return 0;
858 }
859 EXPORT_SYMBOL_GPL(simple_util_init_aux_jacks);
860
simple_util_init_priv(struct simple_util_priv * priv,struct link_info * li)861 int simple_util_init_priv(struct simple_util_priv *priv,
862 struct link_info *li)
863 {
864 struct snd_soc_card *card = simple_priv_to_card(priv);
865 struct device *dev = simple_priv_to_dev(priv);
866 struct snd_soc_dai_link *dai_link;
867 struct simple_dai_props *dai_props;
868 struct simple_util_dai *dais;
869 struct snd_soc_dai_link_component *dlcs;
870 struct snd_soc_codec_conf *cconf = NULL;
871 int i, dai_num = 0, dlc_num = 0, cnf_num = 0;
872
873 dai_props = devm_kcalloc(dev, li->link, sizeof(*dai_props), GFP_KERNEL);
874 dai_link = devm_kcalloc(dev, li->link, sizeof(*dai_link), GFP_KERNEL);
875 if (!dai_props || !dai_link)
876 return -ENOMEM;
877
878 /*
879 * dais (= CPU+Codec)
880 * dlcs (= CPU+Codec+Platform)
881 */
882 for (i = 0; i < li->link; i++) {
883 int cc = li->num[i].cpus + li->num[i].codecs;
884
885 dai_num += cc;
886 dlc_num += cc + li->num[i].platforms;
887
888 if (!li->num[i].cpus)
889 cnf_num += li->num[i].codecs;
890 }
891
892 dais = devm_kcalloc(dev, dai_num, sizeof(*dais), GFP_KERNEL);
893 dlcs = devm_kcalloc(dev, dlc_num, sizeof(*dlcs), GFP_KERNEL);
894 if (!dais || !dlcs)
895 return -ENOMEM;
896
897 if (cnf_num) {
898 cconf = devm_kcalloc(dev, cnf_num, sizeof(*cconf), GFP_KERNEL);
899 if (!cconf)
900 return -ENOMEM;
901 }
902
903 dev_dbg(dev, "link %d, dais %d, ccnf %d\n",
904 li->link, dai_num, cnf_num);
905
906 priv->dai_props = dai_props;
907 priv->dai_link = dai_link;
908 priv->dais = dais;
909 priv->dlcs = dlcs;
910 priv->codec_conf = cconf;
911
912 card->dai_link = priv->dai_link;
913 card->num_links = li->link;
914 card->codec_conf = cconf;
915 card->num_configs = cnf_num;
916
917 for (i = 0; i < li->link; i++) {
918 if (li->num[i].cpus) {
919 /* Normal CPU */
920 dai_link[i].cpus = dlcs;
921 dai_props[i].num.cpus =
922 dai_link[i].num_cpus = li->num[i].cpus;
923 dai_props[i].cpu_dai = dais;
924
925 dlcs += li->num[i].cpus;
926 dais += li->num[i].cpus;
927 } else {
928 /* DPCM Be's CPU = dummy */
929 dai_link[i].cpus = &snd_soc_dummy_dlc;
930 dai_props[i].num.cpus =
931 dai_link[i].num_cpus = 1;
932 }
933
934 if (li->num[i].codecs) {
935 /* Normal Codec */
936 dai_link[i].codecs = dlcs;
937 dai_props[i].num.codecs =
938 dai_link[i].num_codecs = li->num[i].codecs;
939 dai_props[i].codec_dai = dais;
940
941 dlcs += li->num[i].codecs;
942 dais += li->num[i].codecs;
943
944 if (!li->num[i].cpus) {
945 /* DPCM Be's Codec */
946 dai_props[i].codec_conf = cconf;
947 cconf += li->num[i].codecs;
948 }
949 } else {
950 /* DPCM Fe's Codec = dummy */
951 dai_link[i].codecs = &snd_soc_dummy_dlc;
952 dai_props[i].num.codecs =
953 dai_link[i].num_codecs = 1;
954 }
955
956 if (li->num[i].platforms) {
957 /* Have Platform */
958 dai_link[i].platforms = dlcs;
959 dai_props[i].num.platforms =
960 dai_link[i].num_platforms = li->num[i].platforms;
961
962 dlcs += li->num[i].platforms;
963 } else {
964 /* Doesn't have Platform */
965 dai_link[i].platforms = NULL;
966 dai_props[i].num.platforms =
967 dai_link[i].num_platforms = 0;
968 }
969 }
970
971 return 0;
972 }
973 EXPORT_SYMBOL_GPL(simple_util_init_priv);
974
simple_util_remove(struct platform_device * pdev)975 void simple_util_remove(struct platform_device *pdev)
976 {
977 struct snd_soc_card *card = platform_get_drvdata(pdev);
978
979 simple_util_clean_reference(card);
980 }
981 EXPORT_SYMBOL_GPL(simple_util_remove);
982
graph_util_card_probe(struct snd_soc_card * card)983 int graph_util_card_probe(struct snd_soc_card *card)
984 {
985 struct simple_util_priv *priv = snd_soc_card_get_drvdata(card);
986 int ret;
987
988 ret = simple_util_init_hp(card, &priv->hp_jack, NULL);
989 if (ret < 0)
990 return ret;
991
992 ret = simple_util_init_mic(card, &priv->mic_jack, NULL);
993 if (ret < 0)
994 return ret;
995
996 return 0;
997 }
998 EXPORT_SYMBOL_GPL(graph_util_card_probe);
999
graph_util_is_ports0(struct device_node * np)1000 int graph_util_is_ports0(struct device_node *np)
1001 {
1002 struct device_node *port, *ports, *ports0, *top;
1003 int ret;
1004
1005 /* np is "endpoint" or "port" */
1006 if (of_node_name_eq(np, "endpoint")) {
1007 port = of_get_parent(np);
1008 } else {
1009 port = np;
1010 of_node_get(port);
1011 }
1012
1013 ports = of_get_parent(port);
1014 top = of_get_parent(ports);
1015 ports0 = of_get_child_by_name(top, "ports");
1016
1017 ret = ports0 == ports;
1018
1019 of_node_put(port);
1020 of_node_put(ports);
1021 of_node_put(ports0);
1022 of_node_put(top);
1023
1024 return ret;
1025 }
1026 EXPORT_SYMBOL_GPL(graph_util_is_ports0);
1027
graph_get_dai_id(struct device_node * ep)1028 static int graph_get_dai_id(struct device_node *ep)
1029 {
1030 struct device_node *node;
1031 struct device_node *endpoint;
1032 struct of_endpoint info;
1033 int i, id;
1034 int ret;
1035
1036 /* use driver specified DAI ID if exist */
1037 ret = snd_soc_get_dai_id(ep);
1038 if (ret != -ENOTSUPP)
1039 return ret;
1040
1041 /* use endpoint/port reg if exist */
1042 ret = of_graph_parse_endpoint(ep, &info);
1043 if (ret == 0) {
1044 /*
1045 * Because it will count port/endpoint if it doesn't have "reg".
1046 * But, we can't judge whether it has "no reg", or "reg = <0>"
1047 * only of_graph_parse_endpoint().
1048 * We need to check "reg" property
1049 */
1050 if (of_property_present(ep, "reg"))
1051 return info.id;
1052
1053 node = of_get_parent(ep);
1054 ret = of_property_present(node, "reg");
1055 of_node_put(node);
1056 if (ret)
1057 return info.port;
1058 }
1059 node = of_graph_get_port_parent(ep);
1060
1061 /*
1062 * Non HDMI sound case, counting port/endpoint on its DT
1063 * is enough. Let's count it.
1064 */
1065 i = 0;
1066 id = -1;
1067 for_each_endpoint_of_node(node, endpoint) {
1068 if (endpoint == ep)
1069 id = i;
1070 i++;
1071 }
1072
1073 of_node_put(node);
1074
1075 if (id < 0)
1076 return -ENODEV;
1077
1078 return id;
1079 }
1080
graph_util_parse_dai(struct device * dev,struct device_node * ep,struct snd_soc_dai_link_component * dlc,int * is_single_link)1081 int graph_util_parse_dai(struct device *dev, struct device_node *ep,
1082 struct snd_soc_dai_link_component *dlc, int *is_single_link)
1083 {
1084 struct device_node *node;
1085 struct of_phandle_args args = {};
1086 struct snd_soc_dai *dai;
1087 int ret;
1088
1089 if (!ep)
1090 return 0;
1091
1092 node = of_graph_get_port_parent(ep);
1093
1094 /*
1095 * Try to find from DAI node
1096 */
1097 args.np = ep;
1098 dai = snd_soc_get_dai_via_args(&args);
1099 if (dai) {
1100 dlc->dai_name = snd_soc_dai_name_get(dai);
1101 dlc->dai_args = snd_soc_copy_dai_args(dev, &args);
1102 if (!dlc->dai_args)
1103 return -ENOMEM;
1104
1105 goto parse_dai_end;
1106 }
1107
1108 /* Get dai->name */
1109 args.np = node;
1110 args.args[0] = graph_get_dai_id(ep);
1111 args.args_count = (of_graph_get_endpoint_count(node) > 1);
1112
1113 /*
1114 * FIXME
1115 *
1116 * Here, dlc->dai_name is pointer to CPU/Codec DAI name.
1117 * If user unbinded CPU or Codec driver, but not for Sound Card,
1118 * dlc->dai_name is keeping unbinded CPU or Codec
1119 * driver's pointer.
1120 *
1121 * If user re-bind CPU or Codec driver again, ALSA SoC will try
1122 * to rebind Card via snd_soc_try_rebind_card(), but because of
1123 * above reason, it might can't bind Sound Card.
1124 * Because Sound Card is pointing to released dai_name pointer.
1125 *
1126 * To avoid this rebind Card issue,
1127 * 1) It needs to alloc memory to keep dai_name eventhough
1128 * CPU or Codec driver was unbinded, or
1129 * 2) user need to rebind Sound Card everytime
1130 * if he unbinded CPU or Codec.
1131 */
1132 ret = snd_soc_get_dlc(&args, dlc);
1133 if (ret < 0) {
1134 of_node_put(node);
1135 return ret;
1136 }
1137
1138 parse_dai_end:
1139 if (is_single_link)
1140 *is_single_link = of_graph_get_endpoint_count(node) == 1;
1141
1142 return 0;
1143 }
1144 EXPORT_SYMBOL_GPL(graph_util_parse_dai);
1145
graph_util_parse_link_direction(struct device_node * np,bool * playback_only,bool * capture_only)1146 void graph_util_parse_link_direction(struct device_node *np,
1147 bool *playback_only, bool *capture_only)
1148 {
1149 bool is_playback_only = of_property_read_bool(np, "playback-only");
1150 bool is_capture_only = of_property_read_bool(np, "capture-only");
1151
1152 if (is_playback_only)
1153 *playback_only = is_playback_only;
1154 if (is_capture_only)
1155 *capture_only = is_capture_only;
1156 }
1157 EXPORT_SYMBOL_GPL(graph_util_parse_link_direction);
1158
1159 static enum snd_soc_trigger_order
__graph_util_parse_trigger_order(struct simple_util_priv * priv,struct device_node * np,const char * prop)1160 __graph_util_parse_trigger_order(struct simple_util_priv *priv,
1161 struct device_node *np,
1162 const char *prop)
1163 {
1164 u32 val[SND_SOC_TRIGGER_SIZE];
1165 int ret;
1166
1167 ret = of_property_read_u32_array(np, prop, val, SND_SOC_TRIGGER_SIZE);
1168 if (ret == 0) {
1169 struct device *dev = simple_priv_to_dev(priv);
1170 u32 order = (val[0] << 8) +
1171 (val[1] << 4) +
1172 (val[2]);
1173
1174 switch (order) {
1175 case (SND_SOC_TRIGGER_LINK << 8) +
1176 (SND_SOC_TRIGGER_COMPONENT << 4) +
1177 (SND_SOC_TRIGGER_DAI):
1178 return SND_SOC_TRIGGER_ORDER_DEFAULT;
1179
1180 case (SND_SOC_TRIGGER_LINK << 8) +
1181 (SND_SOC_TRIGGER_DAI << 4) +
1182 (SND_SOC_TRIGGER_COMPONENT):
1183 return SND_SOC_TRIGGER_ORDER_LDC;
1184
1185 default:
1186 dev_err(dev, "unsupported trigger order [0x%x]\n", order);
1187 }
1188 }
1189
1190 /* SND_SOC_TRIGGER_ORDER_MAX means error */
1191 return SND_SOC_TRIGGER_ORDER_MAX;
1192 }
1193
graph_util_parse_trigger_order(struct simple_util_priv * priv,struct device_node * np,enum snd_soc_trigger_order * trigger_start,enum snd_soc_trigger_order * trigger_stop)1194 void graph_util_parse_trigger_order(struct simple_util_priv *priv,
1195 struct device_node *np,
1196 enum snd_soc_trigger_order *trigger_start,
1197 enum snd_soc_trigger_order *trigger_stop)
1198 {
1199 static enum snd_soc_trigger_order order;
1200
1201 /*
1202 * We can use it like below
1203 *
1204 * #include <dt-bindings/sound/audio-graph.h>
1205 *
1206 * link-trigger-order = <SND_SOC_TRIGGER_LINK
1207 * SND_SOC_TRIGGER_COMPONENT
1208 * SND_SOC_TRIGGER_DAI>;
1209 */
1210
1211 order = __graph_util_parse_trigger_order(priv, np, "link-trigger-order");
1212 if (order < SND_SOC_TRIGGER_ORDER_MAX) {
1213 *trigger_start = order;
1214 *trigger_stop = order;
1215 }
1216
1217 order = __graph_util_parse_trigger_order(priv, np, "link-trigger-order-start");
1218 if (order < SND_SOC_TRIGGER_ORDER_MAX)
1219 *trigger_start = order;
1220
1221 order = __graph_util_parse_trigger_order(priv, np, "link-trigger-order-stop");
1222 if (order < SND_SOC_TRIGGER_ORDER_MAX)
1223 *trigger_stop = order;
1224
1225 return;
1226 }
1227 EXPORT_SYMBOL_GPL(graph_util_parse_trigger_order);
1228
1229 /* Module information */
1230 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
1231 MODULE_DESCRIPTION("ALSA SoC Simple Card Utils");
1232 MODULE_LICENSE("GPL v2");
1233