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415f1cb2 KM |
1 | /* |
2 | * Renesas Sampling Rate Convert Sound Card for DPCM | |
3 | * | |
4 | * Copyright (C) 2015 Renesas Solutions Corp. | |
5 | * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> | |
6 | * | |
7 | * based on ${LINUX}/sound/soc/generic/simple-card.c | |
8 | * | |
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. | |
12 | */ | |
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 | ||
24 | struct rsrc_card_of_data { | |
25 | const char *prefix; | |
26 | const struct snd_soc_dapm_route *routes; | |
27 | int num_routes; | |
28 | }; | |
29 | ||
30 | static const struct snd_soc_dapm_route routes_ssi0_ak4642[] = { | |
31 | {"ak4642 Playback", NULL, "DAI0 Playback"}, | |
32 | {"DAI0 Capture", NULL, "ak4642 Capture"}, | |
33 | }; | |
34 | ||
35 | static 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 | ||
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 }, | |
b7419dd7 | 44 | { .compatible = "renesas,rsrc-card", }, |
415f1cb2 KM |
45 | {}, |
46 | }; | |
47 | MODULE_DEVICE_TABLE(of, rsrc_card_of_match); | |
48 | ||
04700027 | 49 | #define DAI_NAME_NUM 32 |
415f1cb2 | 50 | struct rsrc_card_dai { |
415f1cb2 KM |
51 | unsigned int fmt; |
52 | unsigned int sysclk; | |
53 | struct clk *clk; | |
04700027 | 54 | char dai_name[DAI_NAME_NUM]; |
415f1cb2 KM |
55 | }; |
56 | ||
415f1cb2 KM |
57 | #define IDX_CPU 0 |
58 | #define IDX_CODEC 1 | |
59 | struct rsrc_card_priv { | |
60 | struct snd_soc_card snd_card; | |
415f1cb2 | 61 | struct snd_soc_codec_conf codec_conf; |
04700027 | 62 | struct rsrc_card_dai *dai_props; |
3433bf07 KM |
63 | struct snd_soc_dai_link *dai_link; |
64 | int dai_num; | |
af7e2be9 | 65 | u32 convert_rate; |
415f1cb2 KM |
66 | }; |
67 | ||
68 | #define rsrc_priv_to_dev(priv) ((priv)->snd_card.dev) | |
8bd616c4 KM |
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)) | |
415f1cb2 KM |
71 | #define rsrc_dev_to_of_data(dev) (of_match_device(rsrc_card_of_match, (dev))->data) |
72 | ||
73 | static int rsrc_card_startup(struct snd_pcm_substream *substream) | |
74 | { | |
75 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
76 | struct rsrc_card_priv *priv = snd_soc_card_get_drvdata(rtd->card); | |
04700027 | 77 | struct rsrc_card_dai *dai_props = |
8bd616c4 | 78 | rsrc_priv_to_props(priv, rtd - rtd->card->rtd); |
415f1cb2 | 79 | |
04700027 | 80 | return clk_prepare_enable(dai_props->clk); |
415f1cb2 KM |
81 | } |
82 | ||
83 | static void rsrc_card_shutdown(struct snd_pcm_substream *substream) | |
84 | { | |
85 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
86 | struct rsrc_card_priv *priv = snd_soc_card_get_drvdata(rtd->card); | |
04700027 | 87 | struct rsrc_card_dai *dai_props = |
8bd616c4 | 88 | rsrc_priv_to_props(priv, rtd - rtd->card->rtd); |
415f1cb2 | 89 | |
04700027 | 90 | clk_disable_unprepare(dai_props->clk); |
415f1cb2 KM |
91 | } |
92 | ||
93 | static struct snd_soc_ops rsrc_card_ops = { | |
94 | .startup = rsrc_card_startup, | |
95 | .shutdown = rsrc_card_shutdown, | |
96 | }; | |
97 | ||
04700027 | 98 | static int rsrc_card_dai_init(struct snd_soc_pcm_runtime *rtd) |
415f1cb2 | 99 | { |
04700027 KM |
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; | |
415f1cb2 KM |
105 | int ret; |
106 | ||
04700027 KM |
107 | dai_link = rsrc_priv_to_link(priv, num); |
108 | dai_props = rsrc_priv_to_props(priv, num); | |
109 | dai = dai_link->dynamic ? | |
110 | rtd->cpu_dai : | |
111 | rtd->codec_dai; | |
112 | ||
113 | if (dai_props->fmt) { | |
114 | ret = snd_soc_dai_set_fmt(dai, dai_props->fmt); | |
415f1cb2 KM |
115 | if (ret && ret != -ENOTSUPP) { |
116 | dev_err(dai->dev, "set_fmt error\n"); | |
117 | goto err; | |
118 | } | |
119 | } | |
120 | ||
04700027 KM |
121 | if (dai_props->sysclk) { |
122 | ret = snd_soc_dai_set_sysclk(dai, 0, dai_props->sysclk, 0); | |
415f1cb2 KM |
123 | if (ret && ret != -ENOTSUPP) { |
124 | dev_err(dai->dev, "set_sysclk error\n"); | |
125 | goto err; | |
126 | } | |
127 | } | |
128 | ||
129 | ret = 0; | |
130 | ||
131 | err: | |
132 | return ret; | |
133 | } | |
134 | ||
af7e2be9 KM |
135 | static int rsrc_card_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd, |
136 | struct snd_pcm_hw_params *params) | |
137 | { | |
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); | |
141 | ||
142 | if (!priv->convert_rate) | |
143 | return 0; | |
144 | ||
145 | rate->min = rate->max = priv->convert_rate; | |
146 | ||
147 | return 0; | |
148 | } | |
149 | ||
fe3bd184 | 150 | static int rsrc_card_parse_daifmt(struct device_node *node, |
04700027 | 151 | struct device_node *np, |
fe3bd184 | 152 | struct rsrc_card_priv *priv, |
04700027 | 153 | int idx, bool is_fe) |
fe3bd184 | 154 | { |
04700027 | 155 | struct rsrc_card_dai *dai_props = rsrc_priv_to_props(priv, idx); |
fe3bd184 KM |
156 | struct device_node *bitclkmaster = NULL; |
157 | struct device_node *framemaster = NULL; | |
04700027 | 158 | struct device_node *codec = is_fe ? NULL : np; |
fe3bd184 KM |
159 | unsigned int daifmt; |
160 | ||
161 | daifmt = snd_soc_of_parse_daifmt(node, NULL, | |
162 | &bitclkmaster, &framemaster); | |
163 | daifmt &= ~SND_SOC_DAIFMT_MASTER_MASK; | |
164 | ||
165 | if (!bitclkmaster && !framemaster) | |
166 | return -EINVAL; | |
167 | ||
168 | if (codec == bitclkmaster) | |
169 | daifmt |= (codec == framemaster) ? | |
170 | SND_SOC_DAIFMT_CBM_CFM : SND_SOC_DAIFMT_CBM_CFS; | |
171 | else | |
172 | daifmt |= (codec == framemaster) ? | |
173 | SND_SOC_DAIFMT_CBS_CFM : SND_SOC_DAIFMT_CBS_CFS; | |
174 | ||
04700027 | 175 | dai_props->fmt = daifmt; |
fe3bd184 KM |
176 | |
177 | of_node_put(bitclkmaster); | |
178 | of_node_put(framemaster); | |
179 | ||
180 | return 0; | |
181 | } | |
182 | ||
04700027 KM |
183 | static int rsrc_card_parse_links(struct device_node *np, |
184 | struct rsrc_card_priv *priv, | |
185 | int idx, bool is_fe) | |
415f1cb2 | 186 | { |
04700027 KM |
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); | |
415f1cb2 | 189 | struct of_phandle_args args; |
415f1cb2 KM |
190 | int ret; |
191 | ||
415f1cb2 KM |
192 | /* |
193 | * Get node via "sound-dai = <&phandle port>" | |
194 | * it will be used as xxx_of_node on soc_bind_dai_link() | |
195 | */ | |
196 | ret = of_parse_phandle_with_args(np, "sound-dai", | |
197 | "#sound-dai-cells", 0, &args); | |
198 | if (ret) | |
199 | return ret; | |
200 | ||
04700027 KM |
201 | if (is_fe) { |
202 | /* BE is dummy */ | |
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"; | |
206 | ||
207 | /* FE settings */ | |
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); | |
212 | ||
213 | /* set dai_name */ | |
214 | snprintf(dai_props->dai_name, DAI_NAME_NUM, "fe.%s", | |
215 | dai_link->cpu_dai_name); | |
216 | ||
217 | /* | |
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 | |
222 | * was 0. See: | |
223 | * fmt_single_name() | |
224 | * fmt_multiple_name() | |
225 | */ | |
226 | if (!args.args_count) | |
227 | dai_link->cpu_dai_name = NULL; | |
228 | } else { | |
229 | struct device *dev = rsrc_priv_to_dev(priv); | |
230 | const struct rsrc_card_of_data *of_data; | |
415f1cb2 | 231 | |
04700027 | 232 | of_data = rsrc_dev_to_of_data(dev); |
415f1cb2 | 233 | |
04700027 KM |
234 | /* FE is dummy */ |
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"; | |
415f1cb2 | 238 | |
04700027 KM |
239 | /* BE settings */ |
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); | |
244 | ||
245 | /* additional name prefix */ | |
b7419dd7 KM |
246 | if (of_data) { |
247 | priv->codec_conf.of_node = dai_link->codec_of_node; | |
248 | priv->codec_conf.name_prefix = of_data->prefix; | |
249 | } else { | |
250 | snd_soc_of_parse_audio_prefix(&priv->snd_card, | |
251 | &priv->codec_conf, | |
252 | dai_link->codec_of_node, | |
253 | "audio-prefix"); | |
254 | } | |
04700027 KM |
255 | |
256 | /* set dai_name */ | |
257 | snprintf(dai_props->dai_name, DAI_NAME_NUM, "be.%s", | |
258 | dai_link->codec_dai_name); | |
415f1cb2 KM |
259 | } |
260 | ||
04700027 KM |
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; | |
269 | ||
270 | return 0; | |
271 | } | |
272 | ||
273 | static int rsrc_card_parse_clk(struct device_node *np, | |
274 | struct rsrc_card_priv *priv, | |
275 | int idx, bool is_fe) | |
276 | { | |
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); | |
279 | struct clk *clk; | |
280 | struct device_node *of_np = is_fe ? dai_link->cpu_of_node : | |
281 | dai_link->codec_of_node; | |
282 | u32 val; | |
283 | ||
415f1cb2 KM |
284 | /* |
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. | |
289 | */ | |
290 | if (of_property_read_bool(np, "clocks")) { | |
291 | clk = of_clk_get(np, 0); | |
061015f7 KM |
292 | if (IS_ERR(clk)) |
293 | return PTR_ERR(clk); | |
415f1cb2 | 294 | |
04700027 KM |
295 | dai_props->sysclk = clk_get_rate(clk); |
296 | dai_props->clk = clk; | |
415f1cb2 | 297 | } else if (!of_property_read_u32(np, "system-clock-frequency", &val)) { |
04700027 | 298 | dai_props->sysclk = val; |
415f1cb2 | 299 | } else { |
04700027 | 300 | clk = of_clk_get(of_np, 0); |
415f1cb2 | 301 | if (!IS_ERR(clk)) |
04700027 | 302 | dai_props->sysclk = clk_get_rate(clk); |
415f1cb2 KM |
303 | } |
304 | ||
305 | return 0; | |
306 | } | |
307 | ||
415f1cb2 | 308 | static int rsrc_card_dai_link_of(struct device_node *node, |
04700027 | 309 | struct device_node *np, |
415f1cb2 KM |
310 | struct rsrc_card_priv *priv, |
311 | int idx) | |
312 | { | |
313 | struct device *dev = rsrc_priv_to_dev(priv); | |
04700027 KM |
314 | struct rsrc_card_dai *dai_props = rsrc_priv_to_props(priv, idx); |
315 | bool is_fe = false; | |
316 | int ret; | |
415f1cb2 | 317 | |
04700027 KM |
318 | if (0 == strcmp(np->name, "cpu")) |
319 | is_fe = true; | |
415f1cb2 | 320 | |
04700027 | 321 | ret = rsrc_card_parse_daifmt(node, np, priv, idx, is_fe); |
415f1cb2 | 322 | if (ret < 0) |
04700027 | 323 | return ret; |
415f1cb2 | 324 | |
04700027 | 325 | ret = rsrc_card_parse_links(np, priv, idx, is_fe); |
415f1cb2 | 326 | if (ret < 0) |
04700027 | 327 | return ret; |
415f1cb2 | 328 | |
04700027 KM |
329 | ret = rsrc_card_parse_clk(np, priv, idx, is_fe); |
330 | if (ret < 0) | |
331 | return ret; | |
415f1cb2 | 332 | |
04700027 KM |
333 | dev_dbg(dev, "\t%s / %04x / %d\n", |
334 | dai_props->dai_name, | |
335 | dai_props->fmt, | |
336 | dai_props->sysclk); | |
415f1cb2 KM |
337 | |
338 | return ret; | |
339 | } | |
340 | ||
341 | static int rsrc_card_parse_of(struct device_node *node, | |
3c7e64dd KM |
342 | struct rsrc_card_priv *priv, |
343 | struct device *dev) | |
415f1cb2 | 344 | { |
415f1cb2 | 345 | const struct rsrc_card_of_data *of_data = rsrc_dev_to_of_data(dev); |
04700027 | 346 | struct rsrc_card_dai *props; |
3433bf07 | 347 | struct snd_soc_dai_link *links; |
04700027 | 348 | struct device_node *np; |
415f1cb2 | 349 | int ret; |
3433bf07 | 350 | int i, num; |
415f1cb2 KM |
351 | |
352 | if (!node) | |
353 | return -EINVAL; | |
354 | ||
3433bf07 KM |
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) | |
359 | return -ENOMEM; | |
360 | ||
361 | priv->dai_props = props; | |
362 | priv->dai_link = links; | |
363 | priv->dai_num = num; | |
364 | ||
3c7e64dd KM |
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; | |
3433bf07 | 369 | priv->snd_card.num_links = num; |
3c7e64dd KM |
370 | priv->snd_card.codec_conf = &priv->codec_conf; |
371 | priv->snd_card.num_configs = 1; | |
b7419dd7 KM |
372 | |
373 | if (of_data) { | |
374 | priv->snd_card.of_dapm_routes = of_data->routes; | |
375 | priv->snd_card.num_of_dapm_routes = of_data->num_routes; | |
376 | } else { | |
377 | snd_soc_of_parse_audio_routing(&priv->snd_card, | |
378 | "audio-routing"); | |
379 | } | |
415f1cb2 | 380 | |
04700027 KM |
381 | /* Parse the card name from DT */ |
382 | snd_soc_of_parse_card_name(&priv->snd_card, "card-name"); | |
383 | ||
af7e2be9 KM |
384 | /* sampling rate convert */ |
385 | of_property_read_u32(node, "convert-rate", &priv->convert_rate); | |
386 | ||
387 | dev_dbg(dev, "New rsrc-audio-card: %s (%d)\n", | |
388 | priv->snd_card.name ? priv->snd_card.name : "", | |
389 | priv->convert_rate); | |
415f1cb2 | 390 | |
04700027 KM |
391 | i = 0; |
392 | for_each_child_of_node(node, np) { | |
393 | ret = rsrc_card_dai_link_of(node, np, priv, i); | |
415f1cb2 KM |
394 | if (ret < 0) |
395 | return ret; | |
04700027 | 396 | i++; |
415f1cb2 KM |
397 | } |
398 | ||
399 | if (!priv->snd_card.name) | |
400 | priv->snd_card.name = priv->snd_card.dai_link->name; | |
401 | ||
402 | return 0; | |
403 | } | |
404 | ||
405 | /* Decrease the reference count of the device nodes */ | |
406 | static int rsrc_card_unref(struct snd_soc_card *card) | |
407 | { | |
408 | struct snd_soc_dai_link *dai_link; | |
409 | int num_links; | |
410 | ||
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); | |
416 | } | |
417 | return 0; | |
418 | } | |
419 | ||
420 | static int rsrc_card_probe(struct platform_device *pdev) | |
421 | { | |
422 | struct rsrc_card_priv *priv; | |
415f1cb2 KM |
423 | struct device_node *np = pdev->dev.of_node; |
424 | struct device *dev = &pdev->dev; | |
425 | int ret; | |
426 | ||
427 | /* Allocate the private data */ | |
428 | priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); | |
429 | if (!priv) | |
430 | return -ENOMEM; | |
431 | ||
3c7e64dd | 432 | ret = rsrc_card_parse_of(np, priv, dev); |
415f1cb2 KM |
433 | if (ret < 0) { |
434 | if (ret != -EPROBE_DEFER) | |
435 | dev_err(dev, "parse error %d\n", ret); | |
436 | goto err; | |
437 | } | |
438 | ||
439 | snd_soc_card_set_drvdata(&priv->snd_card, priv); | |
440 | ||
441 | ret = devm_snd_soc_register_card(&pdev->dev, &priv->snd_card); | |
442 | if (ret >= 0) | |
443 | return ret; | |
444 | err: | |
445 | rsrc_card_unref(&priv->snd_card); | |
446 | ||
447 | return ret; | |
448 | } | |
449 | ||
450 | static int rsrc_card_remove(struct platform_device *pdev) | |
451 | { | |
452 | struct snd_soc_card *card = platform_get_drvdata(pdev); | |
453 | ||
454 | return rsrc_card_unref(card); | |
455 | } | |
456 | ||
457 | static struct platform_driver rsrc_card = { | |
458 | .driver = { | |
459 | .name = "renesas-src-audio-card", | |
460 | .of_match_table = rsrc_card_of_match, | |
461 | }, | |
462 | .probe = rsrc_card_probe, | |
463 | .remove = rsrc_card_remove, | |
464 | }; | |
465 | ||
466 | module_platform_driver(rsrc_card); | |
467 | ||
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>"); |