2 * ASoC simple sound card support
4 * Copyright (C) 2012 Renesas Solutions Corp.
5 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
11 #include <linux/clk.h>
12 #include <linux/device.h>
13 #include <linux/gpio.h>
14 #include <linux/module.h>
16 #include <linux/of_gpio.h>
17 #include <linux/platform_device.h>
18 #include <linux/string.h>
19 #include <sound/jack.h>
20 #include <sound/simple_card.h>
21 #include <sound/soc-dai.h>
22 #include <sound/soc.h>
24 struct asoc_simple_jack {
25 struct snd_soc_jack jack;
26 struct snd_soc_jack_pin pin;
27 struct snd_soc_jack_gpio gpio;
30 struct simple_card_data {
31 struct snd_soc_card snd_card;
32 struct simple_dai_props {
33 struct asoc_simple_dai cpu_dai;
34 struct asoc_simple_dai codec_dai;
38 struct asoc_simple_jack hp_jack;
39 struct asoc_simple_jack mic_jack;
40 struct snd_soc_dai_link *dai_link;
43 #define simple_priv_to_card(priv) (&(priv)->snd_card)
44 #define simple_priv_to_props(priv, i) ((priv)->dai_props + (i))
45 #define simple_priv_to_dev(priv) (simple_priv_to_card(priv)->dev)
46 #define simple_priv_to_link(priv, i) (simple_priv_to_card(priv)->dai_link + (i))
48 #define DAI "sound-dai"
49 #define CELL "#sound-dai-cells"
50 #define PREFIX "simple-audio-card,"
52 #define asoc_simple_card_init_hp(card, sjack, prefix)\
53 asoc_simple_card_init_jack(card, sjack, 1, prefix)
54 #define asoc_simple_card_init_mic(card, sjack, prefix)\
55 asoc_simple_card_init_jack(card, sjack, 0, prefix)
56 static int asoc_simple_card_init_jack(struct snd_soc_card *card,
57 struct asoc_simple_jack *sjack,
58 int is_hp, char *prefix)
60 struct device *dev = card->dev;
61 enum of_gpio_flags flags;
68 sjack->gpio.gpio = -ENOENT;
71 snprintf(prop, sizeof(prop), "%shp-det-gpio", prefix);
72 pin_name = "Headphones";
73 gpio_name = "Headphone detection";
74 mask = SND_JACK_HEADPHONE;
76 snprintf(prop, sizeof(prop), "%smic-det-gpio", prefix);
77 pin_name = "Mic Jack";
78 gpio_name = "Mic detection";
79 mask = SND_JACK_MICROPHONE;
82 det = of_get_named_gpio_flags(dev->of_node, prop, 0, &flags);
83 if (det == -EPROBE_DEFER)
86 if (gpio_is_valid(det)) {
87 sjack->pin.pin = pin_name;
88 sjack->pin.mask = mask;
90 sjack->gpio.name = gpio_name;
91 sjack->gpio.report = mask;
92 sjack->gpio.gpio = det;
93 sjack->gpio.invert = !!(flags & OF_GPIO_ACTIVE_LOW);
94 sjack->gpio.debounce_time = 150;
96 snd_soc_card_jack_new(card, pin_name, mask,
100 snd_soc_jack_add_gpios(&sjack->jack, 1,
107 static void asoc_simple_card_remove_jack(struct asoc_simple_jack *sjack)
109 if (gpio_is_valid(sjack->gpio.gpio))
110 snd_soc_jack_free_gpios(&sjack->jack, 1, &sjack->gpio);
113 static int asoc_simple_card_startup(struct snd_pcm_substream *substream)
115 struct snd_soc_pcm_runtime *rtd = substream->private_data;
116 struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
117 struct simple_dai_props *dai_props =
118 simple_priv_to_props(priv, rtd->num);
121 ret = clk_prepare_enable(dai_props->cpu_dai.clk);
125 ret = clk_prepare_enable(dai_props->codec_dai.clk);
127 clk_disable_unprepare(dai_props->cpu_dai.clk);
132 static void asoc_simple_card_shutdown(struct snd_pcm_substream *substream)
134 struct snd_soc_pcm_runtime *rtd = substream->private_data;
135 struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
136 struct simple_dai_props *dai_props =
137 simple_priv_to_props(priv, rtd->num);
139 clk_disable_unprepare(dai_props->cpu_dai.clk);
141 clk_disable_unprepare(dai_props->codec_dai.clk);
144 static int asoc_simple_card_hw_params(struct snd_pcm_substream *substream,
145 struct snd_pcm_hw_params *params)
147 struct snd_soc_pcm_runtime *rtd = substream->private_data;
148 struct snd_soc_dai *codec_dai = rtd->codec_dai;
149 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
150 struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
151 struct simple_dai_props *dai_props =
152 simple_priv_to_props(priv, rtd->num);
153 unsigned int mclk, mclk_fs = 0;
157 mclk_fs = priv->mclk_fs;
158 else if (dai_props->mclk_fs)
159 mclk_fs = dai_props->mclk_fs;
162 mclk = params_rate(params) * mclk_fs;
163 ret = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
165 if (ret && ret != -ENOTSUPP)
168 ret = snd_soc_dai_set_sysclk(cpu_dai, 0, mclk,
170 if (ret && ret != -ENOTSUPP)
178 static const struct snd_soc_ops asoc_simple_card_ops = {
179 .startup = asoc_simple_card_startup,
180 .shutdown = asoc_simple_card_shutdown,
181 .hw_params = asoc_simple_card_hw_params,
184 static int asoc_simple_card_dai_init(struct snd_soc_pcm_runtime *rtd)
186 struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
187 struct snd_soc_dai *codec = rtd->codec_dai;
188 struct snd_soc_dai *cpu = rtd->cpu_dai;
189 struct simple_dai_props *dai_props =
190 simple_priv_to_props(priv, rtd->num);
193 ret = asoc_simple_card_init_dai(codec, &dai_props->codec_dai);
197 ret = asoc_simple_card_init_dai(cpu, &dai_props->cpu_dai);
201 ret = asoc_simple_card_init_hp(rtd->card, &priv->hp_jack, PREFIX);
205 ret = asoc_simple_card_init_mic(rtd->card, &priv->hp_jack, PREFIX);
212 static int asoc_simple_card_dai_link_of(struct device_node *node,
213 struct simple_card_data *priv,
215 bool is_top_level_node)
217 struct device *dev = simple_priv_to_dev(priv);
218 struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, idx);
219 struct simple_dai_props *dai_props = simple_priv_to_props(priv, idx);
220 struct asoc_simple_dai *cpu_dai = &dai_props->cpu_dai;
221 struct asoc_simple_dai *codec_dai = &dai_props->codec_dai;
222 struct device_node *cpu = NULL;
223 struct device_node *plat = NULL;
224 struct device_node *codec = NULL;
229 /* For single DAI link & old style of DT node */
230 if (is_top_level_node)
233 snprintf(prop, sizeof(prop), "%scpu", prefix);
234 cpu = of_get_child_by_name(node, prop);
238 dev_err(dev, "%s: Can't find %s DT node\n", __func__, prop);
239 goto dai_link_of_err;
242 snprintf(prop, sizeof(prop), "%splat", prefix);
243 plat = of_get_child_by_name(node, prop);
245 snprintf(prop, sizeof(prop), "%scodec", prefix);
246 codec = of_get_child_by_name(node, prop);
250 dev_err(dev, "%s: Can't find %s DT node\n", __func__, prop);
251 goto dai_link_of_err;
254 ret = asoc_simple_card_parse_daifmt(dev, node, codec,
255 prefix, &dai_link->dai_fmt);
257 goto dai_link_of_err;
259 of_property_read_u32(node, "mclk-fs", &dai_props->mclk_fs);
261 ret = asoc_simple_card_parse_cpu(cpu, dai_link,
262 DAI, CELL, &single_cpu);
264 goto dai_link_of_err;
266 ret = asoc_simple_card_parse_codec(codec, dai_link, DAI, CELL);
268 goto dai_link_of_err;
270 ret = asoc_simple_card_parse_platform(plat, dai_link, DAI, CELL);
272 goto dai_link_of_err;
274 ret = snd_soc_of_parse_tdm_slot(cpu, &cpu_dai->tx_slot_mask,
275 &cpu_dai->rx_slot_mask,
277 &cpu_dai->slot_width);
279 goto dai_link_of_err;
281 ret = snd_soc_of_parse_tdm_slot(codec, &codec_dai->tx_slot_mask,
282 &codec_dai->rx_slot_mask,
284 &codec_dai->slot_width);
286 goto dai_link_of_err;
288 ret = asoc_simple_card_parse_clk_cpu(dev, cpu, dai_link, cpu_dai);
290 goto dai_link_of_err;
292 ret = asoc_simple_card_parse_clk_codec(dev, codec, dai_link, codec_dai);
294 goto dai_link_of_err;
296 ret = asoc_simple_card_canonicalize_dailink(dai_link);
298 goto dai_link_of_err;
300 ret = asoc_simple_card_set_dailink_name(dev, dai_link,
302 dai_link->cpu_dai_name,
303 dai_link->codec_dai_name);
305 goto dai_link_of_err;
307 dai_link->ops = &asoc_simple_card_ops;
308 dai_link->init = asoc_simple_card_dai_init;
310 asoc_simple_card_canonicalize_cpu(dai_link, single_cpu);
319 static int asoc_simple_card_parse_aux_devs(struct device_node *node,
320 struct simple_card_data *priv)
322 struct device *dev = simple_priv_to_dev(priv);
323 struct device_node *aux_node;
324 struct snd_soc_card *card = simple_priv_to_card(priv);
327 if (!of_find_property(node, PREFIX "aux-devs", &len))
328 return 0; /* Ok to have no aux-devs */
330 n = len / sizeof(__be32);
334 card->aux_dev = devm_kzalloc(dev,
335 n * sizeof(*card->aux_dev), GFP_KERNEL);
339 for (i = 0; i < n; i++) {
340 aux_node = of_parse_phandle(node, PREFIX "aux-devs", i);
343 card->aux_dev[i].codec_of_node = aux_node;
346 card->num_aux_devs = n;
350 static int asoc_simple_card_parse_of(struct simple_card_data *priv)
352 struct device *dev = simple_priv_to_dev(priv);
353 struct snd_soc_card *card = simple_priv_to_card(priv);
354 struct device_node *dai_link;
355 struct device_node *node = dev->of_node;
361 dai_link = of_get_child_by_name(node, PREFIX "dai-link");
363 /* The off-codec widgets */
364 if (of_property_read_bool(node, PREFIX "widgets")) {
365 ret = snd_soc_of_parse_audio_simple_widgets(card,
372 if (of_property_read_bool(node, PREFIX "routing")) {
373 ret = snd_soc_of_parse_audio_routing(card,
379 /* Factor to mclk, used in hw_params() */
380 of_property_read_u32(node, PREFIX "mclk-fs", &priv->mclk_fs);
382 /* Single/Muti DAI link(s) & New style of DT node */
384 struct device_node *np = NULL;
387 for_each_child_of_node(node, np) {
388 dev_dbg(dev, "\tlink %d:\n", i);
389 ret = asoc_simple_card_dai_link_of(np, priv,
398 /* For single DAI link & old style of DT node */
399 ret = asoc_simple_card_dai_link_of(node, priv, 0, true);
404 ret = asoc_simple_card_parse_card_name(card, PREFIX);
408 ret = asoc_simple_card_parse_aux_devs(node, priv);
411 of_node_put(dai_link);
416 static int asoc_simple_card_probe(struct platform_device *pdev)
418 struct simple_card_data *priv;
419 struct snd_soc_dai_link *dai_link;
420 struct simple_dai_props *dai_props;
421 struct device *dev = &pdev->dev;
422 struct device_node *np = dev->of_node;
423 struct snd_soc_card *card;
426 /* Get the number of DAI links */
427 if (np && of_get_child_by_name(np, PREFIX "dai-link"))
428 num = of_get_child_count(np);
432 /* Allocate the private data and the DAI link array */
433 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
437 dai_props = devm_kzalloc(dev, sizeof(*dai_props) * num, GFP_KERNEL);
438 dai_link = devm_kzalloc(dev, sizeof(*dai_link) * num, GFP_KERNEL);
439 if (!dai_props || !dai_link)
442 priv->dai_props = dai_props;
443 priv->dai_link = dai_link;
445 /* Init snd_soc_card */
446 card = simple_priv_to_card(priv);
447 card->owner = THIS_MODULE;
449 card->dai_link = priv->dai_link;
450 card->num_links = num;
452 if (np && of_device_is_available(np)) {
454 ret = asoc_simple_card_parse_of(priv);
456 if (ret != -EPROBE_DEFER)
457 dev_err(dev, "parse error %d\n", ret);
462 struct asoc_simple_card_info *cinfo;
464 cinfo = dev->platform_data;
466 dev_err(dev, "no info for asoc-simple-card\n");
471 !cinfo->codec_dai.name ||
474 !cinfo->cpu_dai.name) {
475 dev_err(dev, "insufficient asoc_simple_card_info settings\n");
479 card->name = (cinfo->card) ? cinfo->card : cinfo->name;
480 dai_link->name = cinfo->name;
481 dai_link->stream_name = cinfo->name;
482 dai_link->platform_name = cinfo->platform;
483 dai_link->codec_name = cinfo->codec;
484 dai_link->cpu_dai_name = cinfo->cpu_dai.name;
485 dai_link->codec_dai_name = cinfo->codec_dai.name;
486 dai_link->dai_fmt = cinfo->daifmt;
487 dai_link->init = asoc_simple_card_dai_init;
488 memcpy(&priv->dai_props->cpu_dai, &cinfo->cpu_dai,
489 sizeof(priv->dai_props->cpu_dai));
490 memcpy(&priv->dai_props->codec_dai, &cinfo->codec_dai,
491 sizeof(priv->dai_props->codec_dai));
494 snd_soc_card_set_drvdata(card, priv);
496 ret = devm_snd_soc_register_card(dev, card);
502 asoc_simple_card_clean_reference(card);
507 static int asoc_simple_card_remove(struct platform_device *pdev)
509 struct snd_soc_card *card = platform_get_drvdata(pdev);
510 struct simple_card_data *priv = snd_soc_card_get_drvdata(card);
512 asoc_simple_card_remove_jack(&priv->hp_jack);
513 asoc_simple_card_remove_jack(&priv->mic_jack);
515 return asoc_simple_card_clean_reference(card);
518 static const struct of_device_id asoc_simple_of_match[] = {
519 { .compatible = "simple-audio-card", },
522 MODULE_DEVICE_TABLE(of, asoc_simple_of_match);
524 static struct platform_driver asoc_simple_card = {
526 .name = "asoc-simple-card",
527 .pm = &snd_soc_pm_ops,
528 .of_match_table = asoc_simple_of_match,
530 .probe = asoc_simple_card_probe,
531 .remove = asoc_simple_card_remove,
534 module_platform_driver(asoc_simple_card);
536 MODULE_ALIAS("platform:asoc-simple-card");
537 MODULE_LICENSE("GPL v2");
538 MODULE_DESCRIPTION("ASoC Simple Sound Card");
539 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");