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 },
46 MODULE_DEVICE_TABLE(of, rsrc_card_of_match);
48 struct rsrc_card_dai {
55 #define RSRC_FB_NUM 2 /* FE/BE */
58 struct rsrc_card_priv {
59 struct snd_soc_card snd_card;
60 struct rsrc_card_dai_props {
61 struct rsrc_card_dai cpu_dai;
62 struct rsrc_card_dai codec_dai;
63 } dai_props[RSRC_FB_NUM];
64 struct snd_soc_codec_conf codec_conf;
65 struct snd_soc_dai_link dai_link[RSRC_FB_NUM];
69 #define rsrc_priv_to_dev(priv) ((priv)->snd_card.dev)
70 #define rsrc_priv_to_link(priv, i) ((priv)->snd_card.dai_link + i)
71 #define rsrc_priv_to_props(priv, i) ((priv)->dai_props + i)
72 #define rsrc_dev_to_of_data(dev) (of_match_device(rsrc_card_of_match, (dev))->data)
74 static int rsrc_card_startup(struct snd_pcm_substream *substream)
76 struct snd_soc_pcm_runtime *rtd = substream->private_data;
77 struct rsrc_card_priv *priv = snd_soc_card_get_drvdata(rtd->card);
78 struct rsrc_card_dai_props *dai_props =
79 &priv->dai_props[rtd - rtd->card->rtd];
82 ret = clk_prepare_enable(dai_props->cpu_dai.clk);
86 ret = clk_prepare_enable(dai_props->codec_dai.clk);
88 clk_disable_unprepare(dai_props->cpu_dai.clk);
93 static void rsrc_card_shutdown(struct snd_pcm_substream *substream)
95 struct snd_soc_pcm_runtime *rtd = substream->private_data;
96 struct rsrc_card_priv *priv = snd_soc_card_get_drvdata(rtd->card);
97 struct rsrc_card_dai_props *dai_props =
98 &priv->dai_props[rtd - rtd->card->rtd];
100 clk_disable_unprepare(dai_props->cpu_dai.clk);
102 clk_disable_unprepare(dai_props->codec_dai.clk);
105 static struct snd_soc_ops rsrc_card_ops = {
106 .startup = rsrc_card_startup,
107 .shutdown = rsrc_card_shutdown,
110 static int __rsrc_card_dai_init(struct snd_soc_dai *dai,
111 struct rsrc_card_dai *set)
116 ret = snd_soc_dai_set_fmt(dai, set->fmt);
117 if (ret && ret != -ENOTSUPP) {
118 dev_err(dai->dev, "set_fmt error\n");
124 ret = snd_soc_dai_set_sysclk(dai, 0, set->sysclk, 0);
125 if (ret && ret != -ENOTSUPP) {
126 dev_err(dai->dev, "set_sysclk error\n");
137 static int rsrc_card_dai_init(struct snd_soc_pcm_runtime *rtd)
139 struct rsrc_card_priv *priv = snd_soc_card_get_drvdata(rtd->card);
140 struct snd_soc_dai *codec = rtd->codec_dai;
141 struct snd_soc_dai *cpu = rtd->cpu_dai;
142 struct rsrc_card_dai_props *dai_props;
145 num = rtd - rtd->card->rtd;
146 dai_props = &priv->dai_props[num];
147 ret = __rsrc_card_dai_init(codec, &dai_props->codec_dai);
151 ret = __rsrc_card_dai_init(cpu, &dai_props->cpu_dai);
158 static int rsrc_card_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
159 struct snd_pcm_hw_params *params)
161 struct rsrc_card_priv *priv = snd_soc_card_get_drvdata(rtd->card);
162 struct snd_interval *rate = hw_param_interval(params,
163 SNDRV_PCM_HW_PARAM_RATE);
165 if (!priv->convert_rate)
168 rate->min = rate->max = priv->convert_rate;
174 rsrc_card_sub_parse_of(struct rsrc_card_priv *priv,
175 struct device_node *np,
176 struct rsrc_card_dai *dai,
177 struct snd_soc_dai_link *dai_link,
180 struct device *dev = rsrc_priv_to_dev(priv);
181 const struct rsrc_card_of_data *of_data = rsrc_dev_to_of_data(dev);
182 struct of_phandle_args args;
183 struct device_node **p_node;
185 const char **dai_name;
191 p_node = &dai_link->cpu_of_node;
192 dai_name = &dai_link->cpu_dai_name;
193 name = &dai_link->cpu_name;
195 p_node = &dai_link->codec_of_node;
196 dai_name = &dai_link->codec_dai_name;
197 name = &dai_link->codec_name;
201 /* use snd-soc-dummy */
203 *dai_name = "snd-soc-dummy-dai";
204 *name = "snd-soc-dummy";
209 * Get node via "sound-dai = <&phandle port>"
210 * it will be used as xxx_of_node on soc_bind_dai_link()
212 ret = of_parse_phandle_with_args(np, "sound-dai",
213 "#sound-dai-cells", 0, &args);
220 ret = snd_soc_of_get_dai_name(np, dai_name);
227 * rsrc assumes DPCM playback/capture
229 dai_link->dpcm_playback = 1;
230 dai_link->dpcm_capture = 1;
233 *args_count = args.args_count;
234 dai_link->dynamic = 1;
236 dai_link->no_pcm = 1;
237 priv->codec_conf.of_node = (*p_node);
238 priv->codec_conf.name_prefix = of_data->prefix;
242 * Parse dai->sysclk come from "clocks = <&xxx>"
243 * (if system has common clock)
244 * or "system-clock-frequency = <xxx>"
245 * or device's module clock.
247 if (of_property_read_bool(np, "clocks")) {
248 clk = of_clk_get(np, 0);
254 dai->sysclk = clk_get_rate(clk);
256 } else if (!of_property_read_u32(np, "system-clock-frequency", &val)) {
259 clk = of_clk_get(args.np, 0);
261 dai->sysclk = clk_get_rate(clk);
267 static int rsrc_card_parse_daifmt(struct device_node *node,
268 struct rsrc_card_priv *priv,
269 struct device_node *codec,
272 struct device_node *bitclkmaster = NULL;
273 struct device_node *framemaster = NULL;
274 struct rsrc_card_dai_props *dai_props = rsrc_priv_to_props(priv, idx);
275 struct rsrc_card_dai *cpu_dai = &dai_props->cpu_dai;
276 struct rsrc_card_dai *codec_dai = &dai_props->codec_dai;
279 daifmt = snd_soc_of_parse_daifmt(node, NULL,
280 &bitclkmaster, &framemaster);
281 daifmt &= ~SND_SOC_DAIFMT_MASTER_MASK;
283 if (!bitclkmaster && !framemaster)
286 if (codec == bitclkmaster)
287 daifmt |= (codec == framemaster) ?
288 SND_SOC_DAIFMT_CBM_CFM : SND_SOC_DAIFMT_CBM_CFS;
290 daifmt |= (codec == framemaster) ?
291 SND_SOC_DAIFMT_CBS_CFM : SND_SOC_DAIFMT_CBS_CFS;
293 cpu_dai->fmt = daifmt;
294 codec_dai->fmt = daifmt;
296 of_node_put(bitclkmaster);
297 of_node_put(framemaster);
302 static int rsrc_card_dai_link_of(struct device_node *node,
303 struct rsrc_card_priv *priv,
306 struct device *dev = rsrc_priv_to_dev(priv);
307 struct snd_soc_dai_link *dai_link = rsrc_priv_to_link(priv, idx);
308 struct rsrc_card_dai_props *dai_props = rsrc_priv_to_props(priv, idx);
309 struct device_node *cpu = NULL;
310 struct device_node *codec = NULL;
315 cpu = of_get_child_by_name(node, "cpu");
316 codec = of_get_child_by_name(node, "codec");
318 if (!cpu || !codec) {
320 dev_err(dev, "%s: Can't find %s DT node\n", __func__, prop);
321 goto dai_link_of_err;
324 ret = rsrc_card_parse_daifmt(node, priv, codec, idx);
326 goto dai_link_of_err;
328 ret = rsrc_card_sub_parse_of(priv, (idx == IDX_CPU) ? cpu : NULL,
333 goto dai_link_of_err;
335 ret = rsrc_card_sub_parse_of(priv, (idx == IDX_CODEC) ? codec : NULL,
336 &dai_props->codec_dai,
340 goto dai_link_of_err;
342 if (!dai_link->cpu_dai_name || !dai_link->codec_dai_name) {
344 goto dai_link_of_err;
347 /* Simple Card assumes platform == cpu */
348 dai_link->platform_of_node = dai_link->cpu_of_node;
350 /* DAI link name is created from CPU/CODEC dai name */
351 name = devm_kzalloc(dev,
352 strlen(dai_link->cpu_dai_name) +
353 strlen(dai_link->codec_dai_name) + 2,
357 goto dai_link_of_err;
360 sprintf(name, "%s-%s", dai_link->cpu_dai_name,
361 dai_link->codec_dai_name);
362 dai_link->name = dai_link->stream_name = name;
363 dai_link->ops = &rsrc_card_ops;
364 dai_link->init = rsrc_card_dai_init;
366 if (idx == IDX_CODEC)
367 dai_link->be_hw_params_fixup = rsrc_card_be_hw_params_fixup;
369 dev_dbg(dev, "\tname : %s\n", dai_link->stream_name);
370 dev_dbg(dev, "\tcpu : %s / %04x / %d\n",
371 dai_link->cpu_dai_name,
372 dai_props->cpu_dai.fmt,
373 dai_props->cpu_dai.sysclk);
374 dev_dbg(dev, "\tcodec : %s / %04x / %d\n",
375 dai_link->codec_dai_name,
376 dai_props->codec_dai.fmt,
377 dai_props->codec_dai.sysclk);
380 * In soc_bind_dai_link() will check cpu name after
381 * of_node matching if dai_link has cpu_dai_name.
382 * but, it will never match if name was created by
383 * fmt_single_name() remove cpu_dai_name if cpu_args
386 * fmt_multiple_name()
389 dai_link->cpu_dai_name = NULL;
398 static int rsrc_card_parse_of(struct device_node *node,
399 struct rsrc_card_priv *priv)
401 struct device *dev = rsrc_priv_to_dev(priv);
402 const struct rsrc_card_of_data *of_data = rsrc_dev_to_of_data(dev);
409 /* Parse the card name from DT */
410 snd_soc_of_parse_card_name(&priv->snd_card, "card-name");
413 priv->snd_card.of_dapm_routes = of_data->routes;
414 priv->snd_card.num_of_dapm_routes = of_data->num_routes;
416 /* sampling rate convert */
417 of_property_read_u32(node, "convert-rate", &priv->convert_rate);
419 dev_dbg(dev, "New rsrc-audio-card: %s (%d)\n",
420 priv->snd_card.name ? priv->snd_card.name : "",
424 for (i = 0; i < RSRC_FB_NUM; i++) {
425 ret = rsrc_card_dai_link_of(node, priv, i);
430 if (!priv->snd_card.name)
431 priv->snd_card.name = priv->snd_card.dai_link->name;
436 /* Decrease the reference count of the device nodes */
437 static int rsrc_card_unref(struct snd_soc_card *card)
439 struct snd_soc_dai_link *dai_link;
442 for (num_links = 0, dai_link = card->dai_link;
443 num_links < card->num_links;
444 num_links++, dai_link++) {
445 of_node_put(dai_link->cpu_of_node);
446 of_node_put(dai_link->codec_of_node);
451 static int rsrc_card_probe(struct platform_device *pdev)
453 struct rsrc_card_priv *priv;
454 struct snd_soc_dai_link *dai_link;
455 struct device_node *np = pdev->dev.of_node;
456 struct device *dev = &pdev->dev;
459 /* Allocate the private data */
460 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
464 /* Init snd_soc_card */
465 priv->snd_card.owner = THIS_MODULE;
466 priv->snd_card.dev = dev;
467 dai_link = priv->dai_link;
468 priv->snd_card.dai_link = dai_link;
469 priv->snd_card.num_links = RSRC_FB_NUM;
470 priv->snd_card.codec_conf = &priv->codec_conf;
471 priv->snd_card.num_configs = 1;
473 ret = rsrc_card_parse_of(np, priv);
475 if (ret != -EPROBE_DEFER)
476 dev_err(dev, "parse error %d\n", ret);
480 snd_soc_card_set_drvdata(&priv->snd_card, priv);
482 ret = devm_snd_soc_register_card(&pdev->dev, &priv->snd_card);
486 rsrc_card_unref(&priv->snd_card);
491 static int rsrc_card_remove(struct platform_device *pdev)
493 struct snd_soc_card *card = platform_get_drvdata(pdev);
495 return rsrc_card_unref(card);
498 static struct platform_driver rsrc_card = {
500 .name = "renesas-src-audio-card",
501 .of_match_table = rsrc_card_of_match,
503 .probe = rsrc_card_probe,
504 .remove = rsrc_card_remove,
507 module_platform_driver(rsrc_card);
509 MODULE_ALIAS("platform:renesas-src-audio-card");
510 MODULE_LICENSE("GPL");
511 MODULE_DESCRIPTION("Renesas Sampling Rate Convert Sound Card");
512 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");