2 * Renesas Sampling Rate Convert Sound Card for DPCM
4 * Copyright (C) 2015 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/module.h>
17 #include <linux/of_device.h>
18 #include <linux/platform_device.h>
19 #include <linux/string.h>
20 #include <sound/jack.h>
21 #include <sound/soc.h>
22 #include <sound/soc-dai.h>
24 struct rsrc_card_of_data {
26 const struct snd_soc_dapm_route *routes;
30 static const struct snd_soc_dapm_route routes_ssi0_ak4642[] = {
31 {"ak4642 Playback", NULL, "DAI0 Playback"},
32 {"DAI0 Capture", NULL, "ak4642 Capture"},
35 static const struct rsrc_card_of_data routes_of_ssi0_ak4642 = {
37 .routes = routes_ssi0_ak4642,
38 .num_routes = ARRAY_SIZE(routes_ssi0_ak4642),
41 static const struct of_device_id rsrc_card_of_match[] = {
42 { .compatible = "renesas,rsrc-card,lager", .data = &routes_of_ssi0_ak4642 },
43 { .compatible = "renesas,rsrc-card,koelsch", .data = &routes_of_ssi0_ak4642 },
44 { .compatible = "renesas,rsrc-card", },
47 MODULE_DEVICE_TABLE(of, rsrc_card_of_match);
49 #define DAI_NAME_NUM 32
50 struct rsrc_card_dai {
54 char dai_name[DAI_NAME_NUM];
59 struct rsrc_card_priv {
60 struct snd_soc_card snd_card;
61 struct snd_soc_codec_conf codec_conf;
62 struct rsrc_card_dai *dai_props;
63 struct snd_soc_dai_link *dai_link;
68 #define rsrc_priv_to_dev(priv) ((priv)->snd_card.dev)
69 #define rsrc_priv_to_link(priv, i) ((priv)->snd_card.dai_link + (i))
70 #define rsrc_priv_to_props(priv, i) ((priv)->dai_props + (i))
71 #define rsrc_dev_to_of_data(dev) (of_match_device(rsrc_card_of_match, (dev))->data)
73 static int rsrc_card_startup(struct snd_pcm_substream *substream)
75 struct snd_soc_pcm_runtime *rtd = substream->private_data;
76 struct rsrc_card_priv *priv = snd_soc_card_get_drvdata(rtd->card);
77 struct rsrc_card_dai *dai_props =
78 rsrc_priv_to_props(priv, rtd - rtd->card->rtd);
80 return clk_prepare_enable(dai_props->clk);
83 static void rsrc_card_shutdown(struct snd_pcm_substream *substream)
85 struct snd_soc_pcm_runtime *rtd = substream->private_data;
86 struct rsrc_card_priv *priv = snd_soc_card_get_drvdata(rtd->card);
87 struct rsrc_card_dai *dai_props =
88 rsrc_priv_to_props(priv, rtd - rtd->card->rtd);
90 clk_disable_unprepare(dai_props->clk);
93 static struct snd_soc_ops rsrc_card_ops = {
94 .startup = rsrc_card_startup,
95 .shutdown = rsrc_card_shutdown,
98 static int rsrc_card_dai_init(struct snd_soc_pcm_runtime *rtd)
100 struct rsrc_card_priv *priv = snd_soc_card_get_drvdata(rtd->card);
101 struct snd_soc_dai *dai;
102 struct snd_soc_dai_link *dai_link;
103 struct rsrc_card_dai *dai_props;
104 int num = rtd - rtd->card->rtd;
107 dai_link = rsrc_priv_to_link(priv, num);
108 dai_props = rsrc_priv_to_props(priv, num);
109 dai = dai_link->dynamic ?
113 if (dai_props->fmt) {
114 ret = snd_soc_dai_set_fmt(dai, dai_props->fmt);
115 if (ret && ret != -ENOTSUPP) {
116 dev_err(dai->dev, "set_fmt error\n");
121 if (dai_props->sysclk) {
122 ret = snd_soc_dai_set_sysclk(dai, 0, dai_props->sysclk, 0);
123 if (ret && ret != -ENOTSUPP) {
124 dev_err(dai->dev, "set_sysclk error\n");
135 static int rsrc_card_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
136 struct snd_pcm_hw_params *params)
138 struct rsrc_card_priv *priv = snd_soc_card_get_drvdata(rtd->card);
139 struct snd_interval *rate = hw_param_interval(params,
140 SNDRV_PCM_HW_PARAM_RATE);
142 if (!priv->convert_rate)
145 rate->min = rate->max = priv->convert_rate;
150 static int rsrc_card_parse_daifmt(struct device_node *node,
151 struct device_node *np,
152 struct rsrc_card_priv *priv,
155 struct rsrc_card_dai *dai_props = rsrc_priv_to_props(priv, idx);
156 struct device_node *bitclkmaster = NULL;
157 struct device_node *framemaster = NULL;
158 struct device_node *codec = is_fe ? NULL : np;
161 daifmt = snd_soc_of_parse_daifmt(node, NULL,
162 &bitclkmaster, &framemaster);
163 daifmt &= ~SND_SOC_DAIFMT_MASTER_MASK;
165 if (!bitclkmaster && !framemaster)
168 if (codec == bitclkmaster)
169 daifmt |= (codec == framemaster) ?
170 SND_SOC_DAIFMT_CBM_CFM : SND_SOC_DAIFMT_CBM_CFS;
172 daifmt |= (codec == framemaster) ?
173 SND_SOC_DAIFMT_CBS_CFM : SND_SOC_DAIFMT_CBS_CFS;
175 dai_props->fmt = daifmt;
177 of_node_put(bitclkmaster);
178 of_node_put(framemaster);
183 static int rsrc_card_parse_links(struct device_node *np,
184 struct rsrc_card_priv *priv,
187 struct snd_soc_dai_link *dai_link = rsrc_priv_to_link(priv, idx);
188 struct rsrc_card_dai *dai_props = rsrc_priv_to_props(priv, idx);
189 struct of_phandle_args args;
193 * Get node via "sound-dai = <&phandle port>"
194 * it will be used as xxx_of_node on soc_bind_dai_link()
196 ret = of_parse_phandle_with_args(np, "sound-dai",
197 "#sound-dai-cells", 0, &args);
203 dai_link->codec_of_node = NULL;
204 dai_link->codec_dai_name = "snd-soc-dummy-dai";
205 dai_link->codec_name = "snd-soc-dummy";
208 dai_link->dynamic = 1;
209 dai_link->dpcm_merged_format = 1;
210 dai_link->cpu_of_node = args.np;
211 snd_soc_of_get_dai_name(np, &dai_link->cpu_dai_name);
214 snprintf(dai_props->dai_name, DAI_NAME_NUM, "fe.%s",
215 dai_link->cpu_dai_name);
218 * In soc_bind_dai_link() will check cpu name after
219 * of_node matching if dai_link has cpu_dai_name.
220 * but, it will never match if name was created by
221 * fmt_single_name() remove cpu_dai_name if cpu_args
224 * fmt_multiple_name()
226 if (!args.args_count)
227 dai_link->cpu_dai_name = NULL;
229 struct device *dev = rsrc_priv_to_dev(priv);
230 const struct rsrc_card_of_data *of_data;
232 of_data = rsrc_dev_to_of_data(dev);
235 dai_link->cpu_of_node = NULL;
236 dai_link->cpu_dai_name = "snd-soc-dummy-dai";
237 dai_link->cpu_name = "snd-soc-dummy";
240 dai_link->no_pcm = 1;
241 dai_link->be_hw_params_fixup = rsrc_card_be_hw_params_fixup;
242 dai_link->codec_of_node = args.np;
243 snd_soc_of_get_dai_name(np, &dai_link->codec_dai_name);
245 /* additional name prefix */
247 priv->codec_conf.of_node = dai_link->codec_of_node;
248 priv->codec_conf.name_prefix = of_data->prefix;
250 snd_soc_of_parse_audio_prefix(&priv->snd_card,
252 dai_link->codec_of_node,
257 snprintf(dai_props->dai_name, DAI_NAME_NUM, "be.%s",
258 dai_link->codec_dai_name);
261 /* Simple Card assumes platform == cpu */
262 dai_link->platform_of_node = dai_link->cpu_of_node;
263 dai_link->dpcm_playback = 1;
264 dai_link->dpcm_capture = 1;
265 dai_link->name = dai_props->dai_name;
266 dai_link->stream_name = dai_props->dai_name;
267 dai_link->ops = &rsrc_card_ops;
268 dai_link->init = rsrc_card_dai_init;
273 static int rsrc_card_parse_clk(struct device_node *np,
274 struct rsrc_card_priv *priv,
277 struct snd_soc_dai_link *dai_link = rsrc_priv_to_link(priv, idx);
278 struct rsrc_card_dai *dai_props = rsrc_priv_to_props(priv, idx);
280 struct device_node *of_np = is_fe ? dai_link->cpu_of_node :
281 dai_link->codec_of_node;
285 * Parse dai->sysclk come from "clocks = <&xxx>"
286 * (if system has common clock)
287 * or "system-clock-frequency = <xxx>"
288 * or device's module clock.
290 if (of_property_read_bool(np, "clocks")) {
291 clk = of_clk_get(np, 0);
295 dai_props->sysclk = clk_get_rate(clk);
296 dai_props->clk = clk;
297 } else if (!of_property_read_u32(np, "system-clock-frequency", &val)) {
298 dai_props->sysclk = val;
300 clk = of_clk_get(of_np, 0);
302 dai_props->sysclk = clk_get_rate(clk);
308 static int rsrc_card_dai_link_of(struct device_node *node,
309 struct device_node *np,
310 struct rsrc_card_priv *priv,
313 struct device *dev = rsrc_priv_to_dev(priv);
314 struct rsrc_card_dai *dai_props = rsrc_priv_to_props(priv, idx);
318 if (0 == strcmp(np->name, "cpu"))
321 ret = rsrc_card_parse_daifmt(node, np, priv, idx, is_fe);
325 ret = rsrc_card_parse_links(np, priv, idx, is_fe);
329 ret = rsrc_card_parse_clk(np, priv, idx, is_fe);
333 dev_dbg(dev, "\t%s / %04x / %d\n",
341 static int rsrc_card_parse_of(struct device_node *node,
342 struct rsrc_card_priv *priv,
345 const struct rsrc_card_of_data *of_data = rsrc_dev_to_of_data(dev);
346 struct rsrc_card_dai *props;
347 struct snd_soc_dai_link *links;
348 struct device_node *np;
355 num = of_get_child_count(node);
356 props = devm_kzalloc(dev, sizeof(*props) * num, GFP_KERNEL);
357 links = devm_kzalloc(dev, sizeof(*links) * num, GFP_KERNEL);
358 if (!props || !links)
361 priv->dai_props = props;
362 priv->dai_link = links;
365 /* Init snd_soc_card */
366 priv->snd_card.owner = THIS_MODULE;
367 priv->snd_card.dev = dev;
368 priv->snd_card.dai_link = priv->dai_link;
369 priv->snd_card.num_links = num;
370 priv->snd_card.codec_conf = &priv->codec_conf;
371 priv->snd_card.num_configs = 1;
374 priv->snd_card.of_dapm_routes = of_data->routes;
375 priv->snd_card.num_of_dapm_routes = of_data->num_routes;
377 snd_soc_of_parse_audio_routing(&priv->snd_card,
381 /* Parse the card name from DT */
382 snd_soc_of_parse_card_name(&priv->snd_card, "card-name");
384 /* sampling rate convert */
385 of_property_read_u32(node, "convert-rate", &priv->convert_rate);
387 dev_dbg(dev, "New rsrc-audio-card: %s (%d)\n",
388 priv->snd_card.name ? priv->snd_card.name : "",
392 for_each_child_of_node(node, np) {
393 ret = rsrc_card_dai_link_of(node, np, priv, i);
399 if (!priv->snd_card.name)
400 priv->snd_card.name = priv->snd_card.dai_link->name;
405 /* Decrease the reference count of the device nodes */
406 static int rsrc_card_unref(struct snd_soc_card *card)
408 struct snd_soc_dai_link *dai_link;
411 for (num_links = 0, dai_link = card->dai_link;
412 num_links < card->num_links;
413 num_links++, dai_link++) {
414 of_node_put(dai_link->cpu_of_node);
415 of_node_put(dai_link->codec_of_node);
420 static int rsrc_card_probe(struct platform_device *pdev)
422 struct rsrc_card_priv *priv;
423 struct device_node *np = pdev->dev.of_node;
424 struct device *dev = &pdev->dev;
427 /* Allocate the private data */
428 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
432 ret = rsrc_card_parse_of(np, priv, dev);
434 if (ret != -EPROBE_DEFER)
435 dev_err(dev, "parse error %d\n", ret);
439 snd_soc_card_set_drvdata(&priv->snd_card, priv);
441 ret = devm_snd_soc_register_card(&pdev->dev, &priv->snd_card);
445 rsrc_card_unref(&priv->snd_card);
450 static int rsrc_card_remove(struct platform_device *pdev)
452 struct snd_soc_card *card = platform_get_drvdata(pdev);
454 return rsrc_card_unref(card);
457 static struct platform_driver rsrc_card = {
459 .name = "renesas-src-audio-card",
460 .of_match_table = rsrc_card_of_match,
462 .probe = rsrc_card_probe,
463 .remove = rsrc_card_remove,
466 module_platform_driver(rsrc_card);
468 MODULE_ALIAS("platform:renesas-src-audio-card");
469 MODULE_LICENSE("GPL");
470 MODULE_DESCRIPTION("Renesas Sampling Rate Convert Sound Card");
471 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");