2 * ASoC audio graph sound card support
4 * Copyright (C) 2016 Renesas Solutions Corp.
5 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
7 * based on ${LINUX}/sound/soc/generic/simple-card.c
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
13 #include <linux/clk.h>
14 #include <linux/device.h>
15 #include <linux/gpio.h>
16 #include <linux/module.h>
18 #include <linux/of_device.h>
19 #include <linux/of_gpio.h>
20 #include <linux/of_graph.h>
21 #include <linux/platform_device.h>
22 #include <linux/string.h>
23 #include <sound/jack.h>
24 #include <sound/simple_card_utils.h>
26 struct graph_card_data {
27 struct snd_soc_card snd_card;
28 struct graph_dai_props {
29 struct asoc_simple_dai cpu_dai;
30 struct asoc_simple_dai codec_dai;
32 struct snd_soc_dai_link *dai_link;
35 #define graph_priv_to_card(priv) (&(priv)->snd_card)
36 #define graph_priv_to_props(priv, i) ((priv)->dai_props + (i))
37 #define graph_priv_to_dev(priv) (graph_priv_to_card(priv)->dev)
38 #define graph_priv_to_link(priv, i) (graph_priv_to_card(priv)->dai_link + (i))
40 static int asoc_graph_card_startup(struct snd_pcm_substream *substream)
42 struct snd_soc_pcm_runtime *rtd = substream->private_data;
43 struct graph_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
44 struct graph_dai_props *dai_props = graph_priv_to_props(priv, rtd->num);
47 ret = asoc_simple_card_clk_enable(&dai_props->cpu_dai);
51 ret = asoc_simple_card_clk_enable(&dai_props->codec_dai);
53 asoc_simple_card_clk_disable(&dai_props->cpu_dai);
58 static void asoc_graph_card_shutdown(struct snd_pcm_substream *substream)
60 struct snd_soc_pcm_runtime *rtd = substream->private_data;
61 struct graph_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
62 struct graph_dai_props *dai_props = graph_priv_to_props(priv, rtd->num);
64 asoc_simple_card_clk_disable(&dai_props->cpu_dai);
66 asoc_simple_card_clk_disable(&dai_props->codec_dai);
69 static struct snd_soc_ops asoc_graph_card_ops = {
70 .startup = asoc_graph_card_startup,
71 .shutdown = asoc_graph_card_shutdown,
74 static int asoc_graph_card_dai_init(struct snd_soc_pcm_runtime *rtd)
76 struct graph_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
77 struct snd_soc_dai *codec = rtd->codec_dai;
78 struct snd_soc_dai *cpu = rtd->cpu_dai;
79 struct graph_dai_props *dai_props =
80 graph_priv_to_props(priv, rtd->num);
83 ret = asoc_simple_card_init_dai(codec, &dai_props->codec_dai);
87 ret = asoc_simple_card_init_dai(cpu, &dai_props->cpu_dai);
94 static int asoc_graph_card_dai_link_of(struct device_node *cpu_port,
95 struct graph_card_data *priv,
98 struct device *dev = graph_priv_to_dev(priv);
99 struct snd_soc_dai_link *dai_link = graph_priv_to_link(priv, idx);
100 struct graph_dai_props *dai_props = graph_priv_to_props(priv, idx);
101 struct asoc_simple_dai *cpu_dai = &dai_props->cpu_dai;
102 struct asoc_simple_dai *codec_dai = &dai_props->codec_dai;
103 struct device_node *cpu_ep = of_get_next_child(cpu_port, NULL);
104 struct device_node *codec_ep = of_graph_get_remote_endpoint(cpu_ep);
105 struct device_node *rcpu_ep = of_graph_get_remote_endpoint(codec_ep);
108 if (rcpu_ep != cpu_ep) {
109 dev_err(dev, "remote-endpoint mismatch (%s/%s/%s)\n",
110 cpu_ep->name, codec_ep->name, rcpu_ep->name);
112 goto dai_link_of_err;
115 ret = asoc_simple_card_parse_daifmt(dev, cpu_ep, codec_ep,
116 NULL, &dai_link->dai_fmt);
118 goto dai_link_of_err;
121 * we need to consider "mclk-fs" around here
125 ret = asoc_simple_card_parse_graph_cpu(cpu_ep, dai_link);
127 goto dai_link_of_err;
129 ret = asoc_simple_card_parse_graph_codec(codec_ep, dai_link);
131 goto dai_link_of_err;
133 ret = asoc_simple_card_of_parse_tdm(cpu_ep, cpu_dai);
135 goto dai_link_of_err;
137 ret = asoc_simple_card_of_parse_tdm(codec_ep, codec_dai);
139 goto dai_link_of_err;
141 ret = asoc_simple_card_parse_clk_cpu(dev, cpu_ep, dai_link, cpu_dai);
143 goto dai_link_of_err;
145 ret = asoc_simple_card_parse_clk_codec(dev, codec_ep, dai_link, codec_dai);
147 goto dai_link_of_err;
149 ret = asoc_simple_card_canonicalize_dailink(dai_link);
151 goto dai_link_of_err;
153 ret = asoc_simple_card_set_dailink_name(dev, dai_link,
155 dai_link->cpu_dai_name,
156 dai_link->codec_dai_name);
158 goto dai_link_of_err;
160 dai_link->ops = &asoc_graph_card_ops;
161 dai_link->init = asoc_graph_card_dai_init;
163 asoc_simple_card_canonicalize_cpu(dai_link,
164 of_graph_get_endpoint_count(dai_link->cpu_of_node) == 1);
168 of_node_put(rcpu_ep);
169 of_node_put(codec_ep);
174 static int asoc_graph_card_parse_of(struct graph_card_data *priv)
176 struct of_phandle_iterator it;
177 struct device *dev = graph_priv_to_dev(priv);
178 struct snd_soc_card *card = graph_priv_to_card(priv);
179 struct device_node *node = dev->of_node;
184 * we need to consider "widgets", "routing", "mclk-fs" around here
188 of_for_each_phandle(&it, rc, node, "dais", NULL, 0) {
189 ret = asoc_graph_card_dai_link_of(it.node, priv, idx++);
190 of_node_put(it.node);
195 return asoc_simple_card_parse_card_name(card, NULL);
198 static int asoc_graph_get_dais_count(struct device *dev)
200 struct of_phandle_iterator it;
201 struct device_node *node = dev->of_node;
205 of_for_each_phandle(&it, rc, node, "dais", NULL, 0) {
207 of_node_put(it.node);
213 static int asoc_graph_card_probe(struct platform_device *pdev)
215 struct graph_card_data *priv;
216 struct snd_soc_dai_link *dai_link;
217 struct graph_dai_props *dai_props;
218 struct device *dev = &pdev->dev;
219 struct snd_soc_card *card;
222 /* Allocate the private data and the DAI link array */
223 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
227 num = asoc_graph_get_dais_count(dev);
231 dai_props = devm_kzalloc(dev, sizeof(*dai_props) * num, GFP_KERNEL);
232 dai_link = devm_kzalloc(dev, sizeof(*dai_link) * num, GFP_KERNEL);
233 if (!dai_props || !dai_link)
236 priv->dai_props = dai_props;
237 priv->dai_link = dai_link;
239 /* Init snd_soc_card */
240 card = graph_priv_to_card(priv);
241 card->owner = THIS_MODULE;
243 card->dai_link = dai_link;
244 card->num_links = num;
246 ret = asoc_graph_card_parse_of(priv);
248 if (ret != -EPROBE_DEFER)
249 dev_err(dev, "parse error %d\n", ret);
253 snd_soc_card_set_drvdata(card, priv);
255 ret = devm_snd_soc_register_card(dev, card);
261 asoc_simple_card_clean_reference(card);
266 static int asoc_graph_card_remove(struct platform_device *pdev)
268 struct snd_soc_card *card = platform_get_drvdata(pdev);
270 return asoc_simple_card_clean_reference(card);
273 static const struct of_device_id asoc_graph_of_match[] = {
274 { .compatible = "audio-graph-card", },
277 MODULE_DEVICE_TABLE(of, asoc_graph_of_match);
279 static struct platform_driver asoc_graph_card = {
281 .name = "asoc-audio-graph-card",
282 .of_match_table = asoc_graph_of_match,
284 .probe = asoc_graph_card_probe,
285 .remove = asoc_graph_card_remove,
287 module_platform_driver(asoc_graph_card);
289 MODULE_ALIAS("platform:asoc-audio-graph-card");
290 MODULE_LICENSE("GPL v2");
291 MODULE_DESCRIPTION("ASoC Audio Graph Sound Card");
292 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");