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 {
52 unsigned int tx_slot_mask;
53 unsigned int rx_slot_mask;
57 char dai_name[DAI_NAME_NUM];
62 struct rsrc_card_priv {
63 struct snd_soc_card snd_card;
64 struct snd_soc_codec_conf codec_conf;
65 struct rsrc_card_dai *dai_props;
66 struct snd_soc_dai_link *dai_link;
71 #define rsrc_priv_to_dev(priv) ((priv)->snd_card.dev)
72 #define rsrc_priv_to_link(priv, i) ((priv)->snd_card.dai_link + (i))
73 #define rsrc_priv_to_props(priv, i) ((priv)->dai_props + (i))
74 #define rsrc_dev_to_of_data(dev) (of_match_device(rsrc_card_of_match, (dev))->data)
76 static int rsrc_card_startup(struct snd_pcm_substream *substream)
78 struct snd_soc_pcm_runtime *rtd = substream->private_data;
79 struct rsrc_card_priv *priv = snd_soc_card_get_drvdata(rtd->card);
80 struct rsrc_card_dai *dai_props =
81 rsrc_priv_to_props(priv, rtd->num);
83 return clk_prepare_enable(dai_props->clk);
86 static void rsrc_card_shutdown(struct snd_pcm_substream *substream)
88 struct snd_soc_pcm_runtime *rtd = substream->private_data;
89 struct rsrc_card_priv *priv = snd_soc_card_get_drvdata(rtd->card);
90 struct rsrc_card_dai *dai_props =
91 rsrc_priv_to_props(priv, rtd->num);
93 clk_disable_unprepare(dai_props->clk);
96 static struct snd_soc_ops rsrc_card_ops = {
97 .startup = rsrc_card_startup,
98 .shutdown = rsrc_card_shutdown,
101 static int rsrc_card_dai_init(struct snd_soc_pcm_runtime *rtd)
103 struct rsrc_card_priv *priv = snd_soc_card_get_drvdata(rtd->card);
104 struct snd_soc_dai *dai;
105 struct snd_soc_dai_link *dai_link;
106 struct rsrc_card_dai *dai_props;
110 dai_link = rsrc_priv_to_link(priv, num);
111 dai_props = rsrc_priv_to_props(priv, num);
112 dai = dai_link->dynamic ?
116 if (dai_props->sysclk) {
117 ret = snd_soc_dai_set_sysclk(dai, 0, dai_props->sysclk, 0);
118 if (ret && ret != -ENOTSUPP) {
119 dev_err(dai->dev, "set_sysclk error\n");
124 if (dai_props->slots) {
125 ret = snd_soc_dai_set_tdm_slot(dai,
126 dai_props->tx_slot_mask,
127 dai_props->rx_slot_mask,
129 dai_props->slot_width);
130 if (ret && ret != -ENOTSUPP) {
131 dev_err(dai->dev, "set_tdm_slot error\n");
142 static int rsrc_card_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
143 struct snd_pcm_hw_params *params)
145 struct rsrc_card_priv *priv = snd_soc_card_get_drvdata(rtd->card);
146 struct snd_interval *rate = hw_param_interval(params,
147 SNDRV_PCM_HW_PARAM_RATE);
149 if (!priv->convert_rate)
152 rate->min = rate->max = priv->convert_rate;
157 static int rsrc_card_parse_daifmt(struct device_node *node,
158 struct device_node *codec,
159 struct rsrc_card_priv *priv,
160 struct snd_soc_dai_link *dai_link,
161 unsigned int *retfmt)
163 struct device_node *bitclkmaster = NULL;
164 struct device_node *framemaster = NULL;
167 daifmt = snd_soc_of_parse_daifmt(node, NULL,
168 &bitclkmaster, &framemaster);
169 daifmt &= ~SND_SOC_DAIFMT_MASTER_MASK;
171 if (!bitclkmaster && !framemaster)
174 if (codec == bitclkmaster)
175 daifmt |= (codec == framemaster) ?
176 SND_SOC_DAIFMT_CBM_CFM : SND_SOC_DAIFMT_CBM_CFS;
178 daifmt |= (codec == framemaster) ?
179 SND_SOC_DAIFMT_CBS_CFM : SND_SOC_DAIFMT_CBS_CFS;
181 of_node_put(bitclkmaster);
182 of_node_put(framemaster);
189 static int rsrc_card_parse_links(struct device_node *np,
190 struct rsrc_card_priv *priv,
193 struct snd_soc_dai_link *dai_link = rsrc_priv_to_link(priv, idx);
194 struct rsrc_card_dai *dai_props = rsrc_priv_to_props(priv, idx);
195 struct of_phandle_args args;
199 * Get node via "sound-dai = <&phandle port>"
200 * it will be used as xxx_of_node on soc_bind_dai_link()
202 ret = of_parse_phandle_with_args(np, "sound-dai",
203 "#sound-dai-cells", 0, &args);
208 ret = snd_soc_of_parse_tdm_slot(np,
209 &dai_props->tx_slot_mask,
210 &dai_props->rx_slot_mask,
212 &dai_props->slot_width);
218 dai_link->codec_of_node = NULL;
219 dai_link->codec_dai_name = "snd-soc-dummy-dai";
220 dai_link->codec_name = "snd-soc-dummy";
223 dai_link->dynamic = 1;
224 dai_link->dpcm_merged_format = 1;
225 dai_link->cpu_of_node = args.np;
226 ret = snd_soc_of_get_dai_name(np, &dai_link->cpu_dai_name);
231 snprintf(dai_props->dai_name, DAI_NAME_NUM, "fe.%s",
232 dai_link->cpu_dai_name);
235 * In soc_bind_dai_link() will check cpu name after
236 * of_node matching if dai_link has cpu_dai_name.
237 * but, it will never match if name was created by
238 * fmt_single_name() remove cpu_dai_name if cpu_args
241 * fmt_multiple_name()
243 if (!args.args_count)
244 dai_link->cpu_dai_name = NULL;
246 struct device *dev = rsrc_priv_to_dev(priv);
247 const struct rsrc_card_of_data *of_data;
249 of_data = rsrc_dev_to_of_data(dev);
252 dai_link->cpu_of_node = NULL;
253 dai_link->cpu_dai_name = "snd-soc-dummy-dai";
254 dai_link->cpu_name = "snd-soc-dummy";
257 dai_link->no_pcm = 1;
258 dai_link->be_hw_params_fixup = rsrc_card_be_hw_params_fixup;
259 dai_link->codec_of_node = args.np;
260 ret = snd_soc_of_get_dai_name(np, &dai_link->codec_dai_name);
264 /* additional name prefix */
266 priv->codec_conf.of_node = dai_link->codec_of_node;
267 priv->codec_conf.name_prefix = of_data->prefix;
269 snd_soc_of_parse_audio_prefix(&priv->snd_card,
271 dai_link->codec_of_node,
276 snprintf(dai_props->dai_name, DAI_NAME_NUM, "be.%s",
277 dai_link->codec_dai_name);
280 /* Simple Card assumes platform == cpu */
281 dai_link->platform_of_node = dai_link->cpu_of_node;
282 dai_link->dpcm_playback = 1;
283 dai_link->dpcm_capture = 1;
284 dai_link->name = dai_props->dai_name;
285 dai_link->stream_name = dai_props->dai_name;
286 dai_link->ops = &rsrc_card_ops;
287 dai_link->init = rsrc_card_dai_init;
292 static int rsrc_card_parse_clk(struct device_node *np,
293 struct rsrc_card_priv *priv,
296 struct snd_soc_dai_link *dai_link = rsrc_priv_to_link(priv, idx);
297 struct rsrc_card_dai *dai_props = rsrc_priv_to_props(priv, idx);
299 struct device_node *of_np = is_fe ? dai_link->cpu_of_node :
300 dai_link->codec_of_node;
304 * Parse dai->sysclk come from "clocks = <&xxx>"
305 * (if system has common clock)
306 * or "system-clock-frequency = <xxx>"
307 * or device's module clock.
309 if (of_property_read_bool(np, "clocks")) {
310 clk = of_clk_get(np, 0);
314 dai_props->sysclk = clk_get_rate(clk);
315 dai_props->clk = clk;
316 } else if (!of_property_read_u32(np, "system-clock-frequency", &val)) {
317 dai_props->sysclk = val;
319 clk = of_clk_get(of_np, 0);
321 dai_props->sysclk = clk_get_rate(clk);
327 static int rsrc_card_dai_sub_link_of(struct device_node *node,
328 struct device_node *np,
329 struct rsrc_card_priv *priv,
332 struct device *dev = rsrc_priv_to_dev(priv);
333 struct snd_soc_dai_link *dai_link = rsrc_priv_to_link(priv, idx);
334 struct rsrc_card_dai *dai_props = rsrc_priv_to_props(priv, idx);
337 ret = rsrc_card_parse_links(np, priv, idx, is_fe);
341 ret = rsrc_card_parse_clk(np, priv, idx, is_fe);
345 dev_dbg(dev, "\t%s / %04x / %d\n",
353 static int rsrc_card_dai_link_of(struct device_node *node,
354 struct rsrc_card_priv *priv)
356 struct snd_soc_dai_link *dai_link;
357 struct device_node *np;
358 unsigned int daifmt = 0;
364 for_each_child_of_node(node, np) {
365 dai_link = rsrc_priv_to_link(priv, i);
367 if (strcmp(np->name, "codec") == 0) {
368 ret = rsrc_card_parse_daifmt(node, np, priv,
378 for_each_child_of_node(node, np) {
379 dai_link = rsrc_priv_to_link(priv, i);
380 dai_link->dai_fmt = daifmt;
383 if (strcmp(np->name, "cpu") == 0)
386 ret = rsrc_card_dai_sub_link_of(node, np, priv, i, is_fe);
395 static int rsrc_card_parse_of(struct device_node *node,
396 struct rsrc_card_priv *priv,
399 const struct rsrc_card_of_data *of_data = rsrc_dev_to_of_data(dev);
400 struct rsrc_card_dai *props;
401 struct snd_soc_dai_link *links;
408 num = of_get_child_count(node);
409 props = devm_kzalloc(dev, sizeof(*props) * num, GFP_KERNEL);
410 links = devm_kzalloc(dev, sizeof(*links) * num, GFP_KERNEL);
411 if (!props || !links)
414 priv->dai_props = props;
415 priv->dai_link = links;
418 /* Init snd_soc_card */
419 priv->snd_card.owner = THIS_MODULE;
420 priv->snd_card.dev = dev;
421 priv->snd_card.dai_link = priv->dai_link;
422 priv->snd_card.num_links = num;
423 priv->snd_card.codec_conf = &priv->codec_conf;
424 priv->snd_card.num_configs = 1;
427 priv->snd_card.of_dapm_routes = of_data->routes;
428 priv->snd_card.num_of_dapm_routes = of_data->num_routes;
430 snd_soc_of_parse_audio_routing(&priv->snd_card,
434 /* Parse the card name from DT */
435 snd_soc_of_parse_card_name(&priv->snd_card, "card-name");
437 /* sampling rate convert */
438 of_property_read_u32(node, "convert-rate", &priv->convert_rate);
440 dev_dbg(dev, "New rsrc-audio-card: %s (%d)\n",
441 priv->snd_card.name ? priv->snd_card.name : "",
444 ret = rsrc_card_dai_link_of(node, priv);
448 if (!priv->snd_card.name)
449 priv->snd_card.name = priv->snd_card.dai_link->name;
454 /* Decrease the reference count of the device nodes */
455 static int rsrc_card_unref(struct snd_soc_card *card)
457 struct snd_soc_dai_link *dai_link;
460 for (num_links = 0, dai_link = card->dai_link;
461 num_links < card->num_links;
462 num_links++, dai_link++) {
463 of_node_put(dai_link->cpu_of_node);
464 of_node_put(dai_link->codec_of_node);
469 static int rsrc_card_probe(struct platform_device *pdev)
471 struct rsrc_card_priv *priv;
472 struct device_node *np = pdev->dev.of_node;
473 struct device *dev = &pdev->dev;
476 /* Allocate the private data */
477 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
481 ret = rsrc_card_parse_of(np, priv, dev);
483 if (ret != -EPROBE_DEFER)
484 dev_err(dev, "parse error %d\n", ret);
488 snd_soc_card_set_drvdata(&priv->snd_card, priv);
490 ret = devm_snd_soc_register_card(&pdev->dev, &priv->snd_card);
494 rsrc_card_unref(&priv->snd_card);
499 static int rsrc_card_remove(struct platform_device *pdev)
501 struct snd_soc_card *card = platform_get_drvdata(pdev);
503 return rsrc_card_unref(card);
506 static struct platform_driver rsrc_card = {
508 .name = "renesas-src-audio-card",
509 .of_match_table = rsrc_card_of_match,
511 .probe = rsrc_card_probe,
512 .remove = rsrc_card_remove,
515 module_platform_driver(rsrc_card);
517 MODULE_ALIAS("platform:renesas-src-audio-card");
518 MODULE_LICENSE("GPL");
519 MODULE_DESCRIPTION("Renesas Sampling Rate Convert Sound Card");
520 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");