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87f937b4 KM |
1 | /* |
2 | * ASoC audio graph SCU sound card support | |
3 | * | |
4 | * Copyright (C) 2017 Renesas Solutions Corp. | |
5 | * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> | |
6 | * | |
7 | * based on | |
8 | * ${LINUX}/sound/soc/generic/simple-scu-card.c | |
9 | * ${LINUX}/sound/soc/generic/audio-graph-card.c | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License version 2 as | |
13 | * published by the Free Software Foundation. | |
14 | */ | |
15 | #include <linux/clk.h> | |
16 | #include <linux/device.h> | |
17 | #include <linux/gpio.h> | |
18 | #include <linux/module.h> | |
19 | #include <linux/of.h> | |
20 | #include <linux/of_device.h> | |
21 | #include <linux/of_gpio.h> | |
22 | #include <linux/of_graph.h> | |
23 | #include <linux/platform_device.h> | |
24 | #include <linux/string.h> | |
25 | #include <sound/jack.h> | |
26 | #include <sound/simple_card_utils.h> | |
27 | ||
28 | struct graph_card_data { | |
29 | struct snd_soc_card snd_card; | |
30 | struct snd_soc_codec_conf codec_conf; | |
31 | struct asoc_simple_dai *dai_props; | |
32 | struct snd_soc_dai_link *dai_link; | |
c564a5b1 | 33 | struct asoc_simple_card_data adata; |
87f937b4 KM |
34 | }; |
35 | ||
36 | #define graph_priv_to_card(priv) (&(priv)->snd_card) | |
37 | #define graph_priv_to_props(priv, i) ((priv)->dai_props + (i)) | |
38 | #define graph_priv_to_dev(priv) (graph_priv_to_card(priv)->dev) | |
39 | #define graph_priv_to_link(priv, i) (graph_priv_to_card(priv)->dai_link + (i)) | |
40 | ||
41 | static int asoc_graph_card_startup(struct snd_pcm_substream *substream) | |
42 | { | |
43 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
44 | struct graph_card_data *priv = snd_soc_card_get_drvdata(rtd->card); | |
45 | struct asoc_simple_dai *dai_props = graph_priv_to_props(priv, rtd->num); | |
46 | ||
6654fc77 | 47 | return asoc_simple_card_clk_enable(dai_props); |
87f937b4 KM |
48 | } |
49 | ||
50 | static void asoc_graph_card_shutdown(struct snd_pcm_substream *substream) | |
51 | { | |
52 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
53 | struct graph_card_data *priv = snd_soc_card_get_drvdata(rtd->card); | |
54 | struct asoc_simple_dai *dai_props = graph_priv_to_props(priv, rtd->num); | |
55 | ||
6654fc77 | 56 | asoc_simple_card_clk_disable(dai_props); |
87f937b4 KM |
57 | } |
58 | ||
59 | static struct snd_soc_ops asoc_graph_card_ops = { | |
60 | .startup = asoc_graph_card_startup, | |
61 | .shutdown = asoc_graph_card_shutdown, | |
62 | }; | |
63 | ||
64 | static int asoc_graph_card_dai_init(struct snd_soc_pcm_runtime *rtd) | |
65 | { | |
66 | struct graph_card_data *priv = snd_soc_card_get_drvdata(rtd->card); | |
67 | struct snd_soc_dai *dai; | |
68 | struct snd_soc_dai_link *dai_link; | |
69 | struct asoc_simple_dai *dai_props; | |
70 | int num = rtd->num; | |
71 | ||
72 | dai_link = graph_priv_to_link(priv, num); | |
73 | dai_props = graph_priv_to_props(priv, num); | |
74 | dai = dai_link->dynamic ? | |
75 | rtd->cpu_dai : | |
76 | rtd->codec_dai; | |
77 | ||
78 | return asoc_simple_card_init_dai(dai, dai_props); | |
79 | } | |
80 | ||
81 | static int asoc_graph_card_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd, | |
82 | struct snd_pcm_hw_params *params) | |
83 | { | |
84 | struct graph_card_data *priv = snd_soc_card_get_drvdata(rtd->card); | |
87f937b4 | 85 | |
c564a5b1 | 86 | asoc_simple_card_convert_fixup(&priv->adata, params); |
87f937b4 KM |
87 | |
88 | return 0; | |
89 | } | |
90 | ||
91 | static int asoc_graph_card_dai_link_of(struct device_node *ep, | |
92 | struct graph_card_data *priv, | |
93 | unsigned int daifmt, | |
94 | int idx, int is_fe) | |
95 | { | |
96 | struct device *dev = graph_priv_to_dev(priv); | |
97 | struct snd_soc_dai_link *dai_link = graph_priv_to_link(priv, idx); | |
98 | struct asoc_simple_dai *dai_props = graph_priv_to_props(priv, idx); | |
99 | struct snd_soc_card *card = graph_priv_to_card(priv); | |
100 | int ret; | |
101 | ||
102 | if (is_fe) { | |
103 | /* BE is dummy */ | |
104 | dai_link->codec_of_node = NULL; | |
105 | dai_link->codec_dai_name = "snd-soc-dummy-dai"; | |
106 | dai_link->codec_name = "snd-soc-dummy"; | |
107 | ||
108 | /* FE settings */ | |
109 | dai_link->dynamic = 1; | |
110 | dai_link->dpcm_merged_format = 1; | |
111 | ||
112 | ret = asoc_simple_card_parse_graph_cpu(ep, dai_link); | |
113 | if (ret) | |
114 | return ret; | |
115 | ||
116 | ret = asoc_simple_card_parse_clk_cpu(dev, ep, dai_link, dai_props); | |
117 | if (ret < 0) | |
118 | return ret; | |
119 | ||
120 | ret = asoc_simple_card_set_dailink_name(dev, dai_link, | |
121 | "fe.%s", | |
122 | dai_link->cpu_dai_name); | |
123 | if (ret < 0) | |
124 | return ret; | |
125 | ||
126 | /* card->num_links includes Codec */ | |
127 | asoc_simple_card_canonicalize_cpu(dai_link, | |
32f2bcce | 128 | of_graph_get_endpoint_count(dai_link->cpu_of_node) == 1); |
87f937b4 KM |
129 | } else { |
130 | /* FE is dummy */ | |
131 | dai_link->cpu_of_node = NULL; | |
132 | dai_link->cpu_dai_name = "snd-soc-dummy-dai"; | |
133 | dai_link->cpu_name = "snd-soc-dummy"; | |
134 | ||
135 | /* BE settings */ | |
136 | dai_link->no_pcm = 1; | |
137 | dai_link->be_hw_params_fixup = asoc_graph_card_be_hw_params_fixup; | |
138 | ||
139 | ret = asoc_simple_card_parse_graph_codec(ep, dai_link); | |
140 | if (ret < 0) | |
141 | return ret; | |
142 | ||
143 | ret = asoc_simple_card_parse_clk_codec(dev, ep, dai_link, dai_props); | |
144 | if (ret < 0) | |
145 | return ret; | |
146 | ||
147 | ret = asoc_simple_card_set_dailink_name(dev, dai_link, | |
148 | "be.%s", | |
149 | dai_link->codec_dai_name); | |
150 | if (ret < 0) | |
151 | return ret; | |
152 | ||
153 | snd_soc_of_parse_audio_prefix(card, | |
154 | &priv->codec_conf, | |
155 | dai_link->codec_of_node, | |
156 | "prefix"); | |
157 | } | |
158 | ||
616c3b15 | 159 | ret = asoc_simple_card_of_parse_tdm(ep, dai_props); |
87f937b4 KM |
160 | if (ret) |
161 | return ret; | |
162 | ||
163 | ret = asoc_simple_card_canonicalize_dailink(dai_link); | |
164 | if (ret < 0) | |
165 | return ret; | |
166 | ||
167 | dai_link->dai_fmt = daifmt; | |
168 | dai_link->dpcm_playback = 1; | |
169 | dai_link->dpcm_capture = 1; | |
170 | dai_link->ops = &asoc_graph_card_ops; | |
171 | dai_link->init = asoc_graph_card_dai_init; | |
172 | ||
87f937b4 KM |
173 | return 0; |
174 | } | |
175 | ||
176 | static int asoc_graph_card_parse_of(struct graph_card_data *priv) | |
177 | { | |
178 | struct of_phandle_iterator it; | |
179 | struct device *dev = graph_priv_to_dev(priv); | |
180 | struct snd_soc_card *card = graph_priv_to_card(priv); | |
181 | struct device_node *node = dev->of_node; | |
182 | struct device_node *cpu_port; | |
183 | struct device_node *cpu_ep; | |
184 | struct device_node *codec_ep; | |
185 | struct device_node *rcpu_ep; | |
f1f94049 KM |
186 | struct device_node *codec_port; |
187 | struct device_node *codec_port_old; | |
87f937b4 KM |
188 | unsigned int daifmt = 0; |
189 | int dai_idx, ret; | |
190 | int rc, codec; | |
191 | ||
192 | if (!node) | |
193 | return -EINVAL; | |
194 | ||
195 | /* | |
196 | * we need to consider "widgets", "mclk-fs" around here | |
197 | * see simple-card | |
198 | */ | |
199 | ||
9fb9b2f2 KM |
200 | ret = asoc_simple_card_of_parse_routing(card, NULL, 0); |
201 | if (ret < 0) | |
87f937b4 KM |
202 | return ret; |
203 | ||
c564a5b1 | 204 | asoc_simple_card_parse_convert(dev, NULL, &priv->adata); |
87f937b4 KM |
205 | |
206 | /* | |
207 | * it supports multi CPU, single CODEC only here | |
208 | * see asoc_graph_get_dais_count | |
209 | */ | |
210 | ||
211 | /* find 1st codec */ | |
212 | of_for_each_phandle(&it, rc, node, "dais", NULL, 0) { | |
213 | cpu_port = it.node; | |
214 | cpu_ep = of_get_next_child(cpu_port, NULL); | |
215 | codec_ep = of_graph_get_remote_endpoint(cpu_ep); | |
216 | rcpu_ep = of_graph_get_remote_endpoint(codec_ep); | |
217 | ||
87f937b4 KM |
218 | of_node_put(cpu_ep); |
219 | of_node_put(codec_ep); | |
220 | of_node_put(rcpu_ep); | |
221 | ||
222 | if (!codec_ep) | |
223 | continue; | |
224 | ||
225 | if (rcpu_ep != cpu_ep) { | |
226 | dev_err(dev, "remote-endpoint missmatch (%s/%s/%s)\n", | |
227 | cpu_ep->name, codec_ep->name, rcpu_ep->name); | |
228 | ret = -EINVAL; | |
229 | goto parse_of_err; | |
230 | } | |
231 | ||
232 | ret = asoc_simple_card_parse_daifmt(dev, cpu_ep, codec_ep, | |
233 | NULL, &daifmt); | |
c0a480d1 TL |
234 | if (ret < 0) { |
235 | of_node_put(cpu_port); | |
87f937b4 | 236 | goto parse_of_err; |
c0a480d1 | 237 | } |
87f937b4 KM |
238 | } |
239 | ||
240 | dai_idx = 0; | |
f1f94049 | 241 | codec_port_old = NULL; |
87f937b4 KM |
242 | for (codec = 0; codec < 2; codec++) { |
243 | /* | |
244 | * To listup valid sounds continuously, | |
245 | * detect all CPU-dummy first, and | |
246 | * detect all dummy-Codec second | |
247 | */ | |
248 | of_for_each_phandle(&it, rc, node, "dais", NULL, 0) { | |
249 | cpu_port = it.node; | |
250 | cpu_ep = of_get_next_child(cpu_port, NULL); | |
251 | codec_ep = of_graph_get_remote_endpoint(cpu_ep); | |
f1f94049 | 252 | codec_port = of_graph_get_port_parent(codec_ep); |
87f937b4 | 253 | |
87f937b4 KM |
254 | of_node_put(cpu_ep); |
255 | of_node_put(codec_ep); | |
f1f94049 | 256 | of_node_put(codec_port); |
87f937b4 KM |
257 | |
258 | if (codec) { | |
f1f94049 | 259 | if (!codec_port) |
87f937b4 KM |
260 | continue; |
261 | ||
f1f94049 KM |
262 | if (codec_port_old == codec_port) |
263 | continue; | |
264 | ||
265 | codec_port_old = codec_port; | |
266 | ||
87f937b4 KM |
267 | /* Back-End (= Codec) */ |
268 | ret = asoc_graph_card_dai_link_of(codec_ep, priv, daifmt, dai_idx++, 0); | |
c0a480d1 TL |
269 | if (ret < 0) { |
270 | of_node_put(cpu_port); | |
87f937b4 | 271 | goto parse_of_err; |
c0a480d1 | 272 | } |
87f937b4 KM |
273 | } else { |
274 | /* Front-End (= CPU) */ | |
275 | ret = asoc_graph_card_dai_link_of(cpu_ep, priv, daifmt, dai_idx++, 1); | |
c0a480d1 TL |
276 | if (ret < 0) { |
277 | of_node_put(cpu_port); | |
87f937b4 | 278 | goto parse_of_err; |
c0a480d1 | 279 | } |
87f937b4 KM |
280 | } |
281 | } | |
282 | } | |
283 | ||
284 | ret = asoc_simple_card_parse_card_name(card, NULL); | |
285 | if (ret) | |
286 | goto parse_of_err; | |
287 | ||
87f937b4 KM |
288 | ret = 0; |
289 | ||
290 | parse_of_err: | |
291 | return ret; | |
292 | } | |
293 | ||
294 | static int asoc_graph_get_dais_count(struct device *dev) | |
295 | { | |
296 | struct of_phandle_iterator it; | |
297 | struct device_node *node = dev->of_node; | |
298 | struct device_node *cpu_port; | |
299 | struct device_node *cpu_ep; | |
300 | struct device_node *codec_ep; | |
f1f94049 KM |
301 | struct device_node *codec_port; |
302 | struct device_node *codec_port_old; | |
87f937b4 KM |
303 | int count = 0; |
304 | int rc; | |
305 | ||
f1f94049 | 306 | codec_port_old = NULL; |
87f937b4 KM |
307 | of_for_each_phandle(&it, rc, node, "dais", NULL, 0) { |
308 | cpu_port = it.node; | |
309 | cpu_ep = of_get_next_child(cpu_port, NULL); | |
310 | codec_ep = of_graph_get_remote_endpoint(cpu_ep); | |
f1f94049 | 311 | codec_port = of_graph_get_port_parent(codec_ep); |
87f937b4 | 312 | |
87f937b4 KM |
313 | of_node_put(cpu_ep); |
314 | of_node_put(codec_ep); | |
f1f94049 | 315 | of_node_put(codec_port); |
87f937b4 KM |
316 | |
317 | if (cpu_ep) | |
318 | count++; | |
f1f94049 KM |
319 | |
320 | if (!codec_port) | |
321 | continue; | |
322 | ||
323 | if (codec_port_old == codec_port) | |
324 | continue; | |
325 | ||
326 | count++; | |
327 | codec_port_old = codec_port; | |
87f937b4 KM |
328 | } |
329 | ||
330 | return count; | |
331 | } | |
332 | ||
333 | static int asoc_graph_card_probe(struct platform_device *pdev) | |
334 | { | |
335 | struct graph_card_data *priv; | |
336 | struct snd_soc_dai_link *dai_link; | |
337 | struct asoc_simple_dai *dai_props; | |
338 | struct device *dev = &pdev->dev; | |
339 | struct snd_soc_card *card; | |
340 | int num, ret; | |
341 | ||
342 | /* Allocate the private data and the DAI link array */ | |
343 | priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); | |
344 | if (!priv) | |
345 | return -ENOMEM; | |
346 | ||
347 | num = asoc_graph_get_dais_count(dev); | |
348 | if (num == 0) | |
349 | return -EINVAL; | |
350 | ||
351 | dai_props = devm_kzalloc(dev, sizeof(*dai_props) * num, GFP_KERNEL); | |
352 | dai_link = devm_kzalloc(dev, sizeof(*dai_link) * num, GFP_KERNEL); | |
353 | if (!dai_props || !dai_link) | |
354 | return -ENOMEM; | |
355 | ||
356 | priv->dai_props = dai_props; | |
357 | priv->dai_link = dai_link; | |
358 | ||
359 | /* Init snd_soc_card */ | |
360 | card = graph_priv_to_card(priv); | |
361 | card->owner = THIS_MODULE; | |
362 | card->dev = dev; | |
363 | card->dai_link = priv->dai_link; | |
364 | card->num_links = num; | |
365 | card->codec_conf = &priv->codec_conf; | |
366 | card->num_configs = 1; | |
367 | ||
368 | ret = asoc_graph_card_parse_of(priv); | |
369 | if (ret < 0) { | |
370 | if (ret != -EPROBE_DEFER) | |
371 | dev_err(dev, "parse error %d\n", ret); | |
372 | goto err; | |
373 | } | |
374 | ||
375 | snd_soc_card_set_drvdata(card, priv); | |
376 | ||
377 | ret = devm_snd_soc_register_card(dev, card); | |
1a2af564 KM |
378 | if (ret < 0) |
379 | goto err; | |
380 | ||
381 | return 0; | |
87f937b4 KM |
382 | err: |
383 | asoc_simple_card_clean_reference(card); | |
384 | ||
385 | return ret; | |
386 | } | |
387 | ||
388 | static int asoc_graph_card_remove(struct platform_device *pdev) | |
389 | { | |
390 | struct snd_soc_card *card = platform_get_drvdata(pdev); | |
391 | ||
392 | return asoc_simple_card_clean_reference(card); | |
393 | } | |
394 | ||
395 | static const struct of_device_id asoc_graph_of_match[] = { | |
396 | { .compatible = "audio-graph-scu-card", }, | |
397 | {}, | |
398 | }; | |
399 | MODULE_DEVICE_TABLE(of, asoc_graph_of_match); | |
400 | ||
401 | static struct platform_driver asoc_graph_card = { | |
402 | .driver = { | |
403 | .name = "asoc-audio-graph-scu-card", | |
404 | .of_match_table = asoc_graph_of_match, | |
405 | }, | |
406 | .probe = asoc_graph_card_probe, | |
407 | .remove = asoc_graph_card_remove, | |
408 | }; | |
409 | module_platform_driver(asoc_graph_card); | |
410 | ||
411 | MODULE_ALIAS("platform:asoc-audio-graph-scu-card"); | |
412 | MODULE_LICENSE("GPL v2"); | |
413 | MODULE_DESCRIPTION("ASoC Audio Graph SCU Sound Card"); | |
414 | MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>"); |