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13#include <linux/clk.h>
14#include <linux/device.h>
15#include <linux/module.h>
16#include <linux/of.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>
23
24struct rsrc_card_of_data {
25 const char *prefix;
26 const struct snd_soc_dapm_route *routes;
27 int num_routes;
28};
29
30static const struct snd_soc_dapm_route routes_ssi0_ak4642[] = {
31 {"ak4642 Playback", NULL, "DAI0 Playback"},
32 {"DAI0 Capture", NULL, "ak4642 Capture"},
33};
34
35static const struct rsrc_card_of_data routes_of_ssi0_ak4642 = {
36 .prefix = "ak4642",
37 .routes = routes_ssi0_ak4642,
38 .num_routes = ARRAY_SIZE(routes_ssi0_ak4642),
39};
40
41static 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 {},
45};
46MODULE_DEVICE_TABLE(of, rsrc_card_of_match);
47
48#define DAI_NAME_NUM 32
49struct rsrc_card_dai {
50 unsigned int fmt;
51 unsigned int sysclk;
52 struct clk *clk;
53 char dai_name[DAI_NAME_NUM];
54};
55
56#define IDX_CPU 0
57#define IDX_CODEC 1
58struct rsrc_card_priv {
59 struct snd_soc_card snd_card;
60 struct snd_soc_codec_conf codec_conf;
61 struct rsrc_card_dai *dai_props;
62 struct snd_soc_dai_link *dai_link;
63 int dai_num;
64 u32 convert_rate;
65};
66
67#define rsrc_priv_to_dev(priv) ((priv)->snd_card.dev)
68#define rsrc_priv_to_link(priv, i) ((priv)->snd_card.dai_link + (i))
69#define rsrc_priv_to_props(priv, i) ((priv)->dai_props + (i))
70#define rsrc_dev_to_of_data(dev) (of_match_device(rsrc_card_of_match, (dev))->data)
71
72static int rsrc_card_startup(struct snd_pcm_substream *substream)
73{
74 struct snd_soc_pcm_runtime *rtd = substream->private_data;
75 struct rsrc_card_priv *priv = snd_soc_card_get_drvdata(rtd->card);
76 struct rsrc_card_dai *dai_props =
77 rsrc_priv_to_props(priv, rtd - rtd->card->rtd);
78
79 return clk_prepare_enable(dai_props->clk);
80}
81
82static void rsrc_card_shutdown(struct snd_pcm_substream *substream)
83{
84 struct snd_soc_pcm_runtime *rtd = substream->private_data;
85 struct rsrc_card_priv *priv = snd_soc_card_get_drvdata(rtd->card);
86 struct rsrc_card_dai *dai_props =
87 rsrc_priv_to_props(priv, rtd - rtd->card->rtd);
88
89 clk_disable_unprepare(dai_props->clk);
90}
91
92static struct snd_soc_ops rsrc_card_ops = {
93 .startup = rsrc_card_startup,
94 .shutdown = rsrc_card_shutdown,
95};
96
97static int rsrc_card_dai_init(struct snd_soc_pcm_runtime *rtd)
98{
99 struct rsrc_card_priv *priv = snd_soc_card_get_drvdata(rtd->card);
100 struct snd_soc_dai *dai;
101 struct snd_soc_dai_link *dai_link;
102 struct rsrc_card_dai *dai_props;
103 int num = rtd - rtd->card->rtd;
104 int ret;
105
106 dai_link = rsrc_priv_to_link(priv, num);
107 dai_props = rsrc_priv_to_props(priv, num);
108 dai = dai_link->dynamic ?
109 rtd->cpu_dai :
110 rtd->codec_dai;
111
112 if (dai_props->fmt) {
113 ret = snd_soc_dai_set_fmt(dai, dai_props->fmt);
114 if (ret && ret != -ENOTSUPP) {
115 dev_err(dai->dev, "set_fmt error\n");
116 goto err;
117 }
118 }
119
120 if (dai_props->sysclk) {
121 ret = snd_soc_dai_set_sysclk(dai, 0, dai_props->sysclk, 0);
122 if (ret && ret != -ENOTSUPP) {
123 dev_err(dai->dev, "set_sysclk error\n");
124 goto err;
125 }
126 }
127
128 ret = 0;
129
130err:
131 return ret;
132}
133
134static int rsrc_card_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
135 struct snd_pcm_hw_params *params)
136{
137 struct rsrc_card_priv *priv = snd_soc_card_get_drvdata(rtd->card);
138 struct snd_interval *rate = hw_param_interval(params,
139 SNDRV_PCM_HW_PARAM_RATE);
140
141 if (!priv->convert_rate)
142 return 0;
143
144 rate->min = rate->max = priv->convert_rate;
145
146 return 0;
147}
148
149static int rsrc_card_parse_daifmt(struct device_node *node,
150 struct device_node *np,
151 struct rsrc_card_priv *priv,
152 int idx, bool is_fe)
153{
154 struct rsrc_card_dai *dai_props = rsrc_priv_to_props(priv, idx);
155 struct device_node *bitclkmaster = NULL;
156 struct device_node *framemaster = NULL;
157 struct device_node *codec = is_fe ? NULL : np;
158 unsigned int daifmt;
159
160 daifmt = snd_soc_of_parse_daifmt(node, NULL,
161 &bitclkmaster, &framemaster);
162 daifmt &= ~SND_SOC_DAIFMT_MASTER_MASK;
163
164 if (!bitclkmaster && !framemaster)
165 return -EINVAL;
166
167 if (codec == bitclkmaster)
168 daifmt |= (codec == framemaster) ?
169 SND_SOC_DAIFMT_CBM_CFM : SND_SOC_DAIFMT_CBM_CFS;
170 else
171 daifmt |= (codec == framemaster) ?
172 SND_SOC_DAIFMT_CBS_CFM : SND_SOC_DAIFMT_CBS_CFS;
173
174 dai_props->fmt = daifmt;
175
176 of_node_put(bitclkmaster);
177 of_node_put(framemaster);
178
179 return 0;
180}
181
182static int rsrc_card_parse_links(struct device_node *np,
183 struct rsrc_card_priv *priv,
184 int idx, bool is_fe)
185{
186 struct snd_soc_dai_link *dai_link = rsrc_priv_to_link(priv, idx);
187 struct rsrc_card_dai *dai_props = rsrc_priv_to_props(priv, idx);
188 struct of_phandle_args args;
189 int ret;
190
191
192
193
194
195 ret = of_parse_phandle_with_args(np, "sound-dai",
196 "#sound-dai-cells", 0, &args);
197 if (ret)
198 return ret;
199
200 if (is_fe) {
201
202 dai_link->codec_of_node = NULL;
203 dai_link->codec_dai_name = "snd-soc-dummy-dai";
204 dai_link->codec_name = "snd-soc-dummy";
205
206
207 dai_link->dynamic = 1;
208 dai_link->dpcm_merged_format = 1;
209 dai_link->cpu_of_node = args.np;
210 snd_soc_of_get_dai_name(np, &dai_link->cpu_dai_name);
211
212
213 snprintf(dai_props->dai_name, DAI_NAME_NUM, "fe.%s",
214 dai_link->cpu_dai_name);
215
216
217
218
219
220
221
222
223
224
225 if (!args.args_count)
226 dai_link->cpu_dai_name = NULL;
227 } else {
228 struct device *dev = rsrc_priv_to_dev(priv);
229 const struct rsrc_card_of_data *of_data;
230
231 of_data = rsrc_dev_to_of_data(dev);
232
233
234 dai_link->cpu_of_node = NULL;
235 dai_link->cpu_dai_name = "snd-soc-dummy-dai";
236 dai_link->cpu_name = "snd-soc-dummy";
237
238
239 dai_link->no_pcm = 1;
240 dai_link->be_hw_params_fixup = rsrc_card_be_hw_params_fixup;
241 dai_link->codec_of_node = args.np;
242 snd_soc_of_get_dai_name(np, &dai_link->codec_dai_name);
243
244
245 priv->codec_conf.of_node = dai_link->codec_of_node;
246 priv->codec_conf.name_prefix = of_data->prefix;
247
248
249 snprintf(dai_props->dai_name, DAI_NAME_NUM, "be.%s",
250 dai_link->codec_dai_name);
251 }
252
253
254 dai_link->platform_of_node = dai_link->cpu_of_node;
255 dai_link->dpcm_playback = 1;
256 dai_link->dpcm_capture = 1;
257 dai_link->name = dai_props->dai_name;
258 dai_link->stream_name = dai_props->dai_name;
259 dai_link->ops = &rsrc_card_ops;
260 dai_link->init = rsrc_card_dai_init;
261
262 return 0;
263}
264
265static int rsrc_card_parse_clk(struct device_node *np,
266 struct rsrc_card_priv *priv,
267 int idx, bool is_fe)
268{
269 struct snd_soc_dai_link *dai_link = rsrc_priv_to_link(priv, idx);
270 struct rsrc_card_dai *dai_props = rsrc_priv_to_props(priv, idx);
271 struct clk *clk;
272 struct device_node *of_np = is_fe ? dai_link->cpu_of_node :
273 dai_link->codec_of_node;
274 u32 val;
275
276
277
278
279
280
281
282 if (of_property_read_bool(np, "clocks")) {
283 clk = of_clk_get(np, 0);
284 if (IS_ERR(clk))
285 return PTR_ERR(clk);
286
287 dai_props->sysclk = clk_get_rate(clk);
288 dai_props->clk = clk;
289 } else if (!of_property_read_u32(np, "system-clock-frequency", &val)) {
290 dai_props->sysclk = val;
291 } else {
292 clk = of_clk_get(of_np, 0);
293 if (!IS_ERR(clk))
294 dai_props->sysclk = clk_get_rate(clk);
295 }
296
297 return 0;
298}
299
300static int rsrc_card_dai_link_of(struct device_node *node,
301 struct device_node *np,
302 struct rsrc_card_priv *priv,
303 int idx)
304{
305 struct device *dev = rsrc_priv_to_dev(priv);
306 struct rsrc_card_dai *dai_props = rsrc_priv_to_props(priv, idx);
307 bool is_fe = false;
308 int ret;
309
310 if (0 == strcmp(np->name, "cpu"))
311 is_fe = true;
312
313 ret = rsrc_card_parse_daifmt(node, np, priv, idx, is_fe);
314 if (ret < 0)
315 return ret;
316
317 ret = rsrc_card_parse_links(np, priv, idx, is_fe);
318 if (ret < 0)
319 return ret;
320
321 ret = rsrc_card_parse_clk(np, priv, idx, is_fe);
322 if (ret < 0)
323 return ret;
324
325 dev_dbg(dev, "\t%s / %04x / %d\n",
326 dai_props->dai_name,
327 dai_props->fmt,
328 dai_props->sysclk);
329
330 return ret;
331}
332
333static int rsrc_card_parse_of(struct device_node *node,
334 struct rsrc_card_priv *priv,
335 struct device *dev)
336{
337 const struct rsrc_card_of_data *of_data = rsrc_dev_to_of_data(dev);
338 struct rsrc_card_dai *props;
339 struct snd_soc_dai_link *links;
340 struct device_node *np;
341 int ret;
342 int i, num;
343
344 if (!node)
345 return -EINVAL;
346
347 num = of_get_child_count(node);
348 props = devm_kzalloc(dev, sizeof(*props) * num, GFP_KERNEL);
349 links = devm_kzalloc(dev, sizeof(*links) * num, GFP_KERNEL);
350 if (!props || !links)
351 return -ENOMEM;
352
353 priv->dai_props = props;
354 priv->dai_link = links;
355 priv->dai_num = num;
356
357
358 priv->snd_card.owner = THIS_MODULE;
359 priv->snd_card.dev = dev;
360 priv->snd_card.dai_link = priv->dai_link;
361 priv->snd_card.num_links = num;
362 priv->snd_card.codec_conf = &priv->codec_conf;
363 priv->snd_card.num_configs = 1;
364 priv->snd_card.of_dapm_routes = of_data->routes;
365 priv->snd_card.num_of_dapm_routes = of_data->num_routes;
366
367
368 snd_soc_of_parse_card_name(&priv->snd_card, "card-name");
369
370
371 of_property_read_u32(node, "convert-rate", &priv->convert_rate);
372
373 dev_dbg(dev, "New rsrc-audio-card: %s (%d)\n",
374 priv->snd_card.name ? priv->snd_card.name : "",
375 priv->convert_rate);
376
377 i = 0;
378 for_each_child_of_node(node, np) {
379 ret = rsrc_card_dai_link_of(node, np, priv, i);
380 if (ret < 0)
381 return ret;
382 i++;
383 }
384
385 if (!priv->snd_card.name)
386 priv->snd_card.name = priv->snd_card.dai_link->name;
387
388 return 0;
389}
390
391
392static int rsrc_card_unref(struct snd_soc_card *card)
393{
394 struct snd_soc_dai_link *dai_link;
395 int num_links;
396
397 for (num_links = 0, dai_link = card->dai_link;
398 num_links < card->num_links;
399 num_links++, dai_link++) {
400 of_node_put(dai_link->cpu_of_node);
401 of_node_put(dai_link->codec_of_node);
402 }
403 return 0;
404}
405
406static int rsrc_card_probe(struct platform_device *pdev)
407{
408 struct rsrc_card_priv *priv;
409 struct device_node *np = pdev->dev.of_node;
410 struct device *dev = &pdev->dev;
411 int ret;
412
413
414 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
415 if (!priv)
416 return -ENOMEM;
417
418 ret = rsrc_card_parse_of(np, priv, dev);
419 if (ret < 0) {
420 if (ret != -EPROBE_DEFER)
421 dev_err(dev, "parse error %d\n", ret);
422 goto err;
423 }
424
425 snd_soc_card_set_drvdata(&priv->snd_card, priv);
426
427 ret = devm_snd_soc_register_card(&pdev->dev, &priv->snd_card);
428 if (ret >= 0)
429 return ret;
430err:
431 rsrc_card_unref(&priv->snd_card);
432
433 return ret;
434}
435
436static int rsrc_card_remove(struct platform_device *pdev)
437{
438 struct snd_soc_card *card = platform_get_drvdata(pdev);
439
440 return rsrc_card_unref(card);
441}
442
443static struct platform_driver rsrc_card = {
444 .driver = {
445 .name = "renesas-src-audio-card",
446 .of_match_table = rsrc_card_of_match,
447 },
448 .probe = rsrc_card_probe,
449 .remove = rsrc_card_remove,
450};
451
452module_platform_driver(rsrc_card);
453
454MODULE_ALIAS("platform:renesas-src-audio-card");
455MODULE_LICENSE("GPL");
456MODULE_DESCRIPTION("Renesas Sampling Rate Convert Sound Card");
457MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
458
