1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * mtk-soundcard-driver.c -- MediaTek soundcard driver common
4 *
5 * Copyright (c) 2022 MediaTek Inc.
6 * Author: Trevor Wu <trevor.wu@mediatek.com>
7 */
8
9 #include <linux/module.h>
10 #include <linux/of.h>
11 #include <linux/of_platform.h>
12 #include <sound/soc.h>
13
14 #include "mtk-dsp-sof-common.h"
15 #include "mtk-soc-card.h"
16 #include "mtk-soundcard-driver.h"
17
set_card_codec_info(struct snd_soc_card * card,struct device_node * sub_node,struct snd_soc_dai_link * dai_link)18 static int set_card_codec_info(struct snd_soc_card *card,
19 struct device_node *sub_node,
20 struct snd_soc_dai_link *dai_link)
21 {
22 struct device *dev = card->dev;
23 struct device_node *codec_node;
24 int ret;
25
26 codec_node = of_get_child_by_name(sub_node, "codec");
27 if (!codec_node) {
28 dev_dbg(dev, "%s no specified codec: setting dummy.\n", dai_link->name);
29
30 dai_link->codecs = &snd_soc_dummy_dlc;
31 dai_link->num_codecs = 1;
32 dai_link->dynamic = 1;
33 return 0;
34 }
35
36 /* set card codec info */
37 ret = snd_soc_of_get_dai_link_codecs(dev, codec_node, dai_link);
38
39 of_node_put(codec_node);
40
41 if (ret < 0)
42 return dev_err_probe(dev, ret, "%s: codec dai not found\n",
43 dai_link->name);
44
45 return 0;
46 }
47
set_dailink_daifmt(struct snd_soc_card * card,struct device_node * sub_node,struct snd_soc_dai_link * dai_link)48 static int set_dailink_daifmt(struct snd_soc_card *card,
49 struct device_node *sub_node,
50 struct snd_soc_dai_link *dai_link)
51 {
52 unsigned int daifmt;
53 const char *str;
54 int ret;
55 struct {
56 char *name;
57 unsigned int val;
58 } of_clk_table[] = {
59 { "cpu", SND_SOC_DAIFMT_CBC_CFC },
60 { "codec", SND_SOC_DAIFMT_CBP_CFP },
61 };
62
63 daifmt = snd_soc_daifmt_parse_format(sub_node, NULL);
64 if (daifmt) {
65 dai_link->dai_fmt &= SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK;
66 dai_link->dai_fmt |= daifmt;
67 }
68
69 /*
70 * check "mediatek,clk-provider = xxx"
71 * SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK area
72 */
73 ret = of_property_read_string(sub_node, "mediatek,clk-provider", &str);
74 if (ret == 0) {
75 int i;
76
77 for (i = 0; i < ARRAY_SIZE(of_clk_table); i++) {
78 if (strcmp(str, of_clk_table[i].name) == 0) {
79 dai_link->dai_fmt &= ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK;
80 dai_link->dai_fmt |= of_clk_table[i].val;
81 break;
82 }
83 }
84 }
85
86 return 0;
87 }
88
parse_dai_link_info(struct snd_soc_card * card)89 int parse_dai_link_info(struct snd_soc_card *card)
90 {
91 struct device *dev = card->dev;
92 struct device_node *sub_node;
93 struct snd_soc_dai_link *dai_link;
94 const char *dai_link_name;
95 int ret, i;
96
97 /* Loop over all the dai link sub nodes */
98 for_each_available_child_of_node(dev->of_node, sub_node) {
99 if (of_property_read_string(sub_node, "link-name",
100 &dai_link_name)) {
101 of_node_put(sub_node);
102 return -EINVAL;
103 }
104
105 for_each_card_prelinks(card, i, dai_link) {
106 if (!strcmp(dai_link_name, dai_link->name))
107 break;
108 }
109
110 if (i >= card->num_links) {
111 of_node_put(sub_node);
112 return -EINVAL;
113 }
114
115 ret = set_card_codec_info(card, sub_node, dai_link);
116 if (ret < 0) {
117 of_node_put(sub_node);
118 return ret;
119 }
120
121 ret = set_dailink_daifmt(card, sub_node, dai_link);
122 if (ret < 0) {
123 of_node_put(sub_node);
124 return ret;
125 }
126 }
127
128 return 0;
129 }
130 EXPORT_SYMBOL_GPL(parse_dai_link_info);
131
clean_card_reference(struct snd_soc_card * card)132 void clean_card_reference(struct snd_soc_card *card)
133 {
134 struct snd_soc_dai_link *dai_link;
135 int i;
136
137 /* release codec reference gotten by set_card_codec_info */
138 for_each_card_prelinks(card, i, dai_link)
139 snd_soc_of_put_dai_link_codecs(dai_link);
140 }
141 EXPORT_SYMBOL_GPL(clean_card_reference);
142
mtk_soundcard_startup(struct snd_pcm_substream * substream,enum mtk_pcm_constraint_type ctype)143 int mtk_soundcard_startup(struct snd_pcm_substream *substream,
144 enum mtk_pcm_constraint_type ctype)
145 {
146 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
147 struct mtk_soc_card_data *soc_card = snd_soc_card_get_drvdata(rtd->card);
148 const struct mtk_pcm_constraints_data *mpc = &soc_card->card_data->pcm_constraints[ctype];
149 int ret;
150
151 if (unlikely(!mpc))
152 return -EINVAL;
153
154 ret = snd_pcm_hw_constraint_list(substream->runtime, 0,
155 SNDRV_PCM_HW_PARAM_RATE,
156 mpc->rates);
157 if (ret < 0) {
158 dev_err(rtd->dev, "hw_constraint_list rate failed\n");
159 return ret;
160 }
161
162 ret = snd_pcm_hw_constraint_list(substream->runtime, 0,
163 SNDRV_PCM_HW_PARAM_CHANNELS,
164 mpc->channels);
165 if (ret < 0) {
166 dev_err(rtd->dev, "hw_constraint_list channel failed\n");
167 return ret;
168 }
169
170 return 0;
171 }
172 EXPORT_SYMBOL_GPL(mtk_soundcard_startup);
173
mtk_soundcard_playback_startup(struct snd_pcm_substream * substream)174 static int mtk_soundcard_playback_startup(struct snd_pcm_substream *substream)
175 {
176 return mtk_soundcard_startup(substream, MTK_CONSTRAINT_PLAYBACK);
177 }
178
179 const struct snd_soc_ops mtk_soundcard_common_playback_ops = {
180 .startup = mtk_soundcard_playback_startup,
181 };
182 EXPORT_SYMBOL_GPL(mtk_soundcard_common_playback_ops);
183
mtk_soundcard_capture_startup(struct snd_pcm_substream * substream)184 static int mtk_soundcard_capture_startup(struct snd_pcm_substream *substream)
185 {
186 return mtk_soundcard_startup(substream, MTK_CONSTRAINT_CAPTURE);
187 }
188
189 const struct snd_soc_ops mtk_soundcard_common_capture_ops = {
190 .startup = mtk_soundcard_capture_startup,
191 };
192 EXPORT_SYMBOL_GPL(mtk_soundcard_common_capture_ops);
193
mtk_soundcard_common_probe(struct platform_device * pdev)194 int mtk_soundcard_common_probe(struct platform_device *pdev)
195 {
196 struct device_node *platform_node, *adsp_node, *accdet_node;
197 struct snd_soc_component *accdet_comp;
198 struct platform_device *accdet_pdev;
199 const struct mtk_soundcard_pdata *pdata;
200 struct mtk_soc_card_data *soc_card_data;
201 struct snd_soc_dai_link *orig_dai_link, *dai_link;
202 struct snd_soc_jack *jacks;
203 struct snd_soc_card *card;
204 int i, orig_num_links, ret;
205 bool needs_legacy_probe;
206
207 pdata = device_get_match_data(&pdev->dev);
208 if (!pdata)
209 return -EINVAL;
210
211 card = pdata->card_data->card;
212 card->dev = &pdev->dev;
213 orig_dai_link = card->dai_link;
214 orig_num_links = card->num_links;
215
216 ret = snd_soc_of_parse_card_name(card, "model");
217 if (ret)
218 return ret;
219
220 if (!card->name) {
221 if (!pdata->card_name)
222 return -EINVAL;
223
224 card->name = pdata->card_name;
225 }
226
227 needs_legacy_probe = !of_property_present(pdev->dev.of_node, "audio-routing");
228 if (needs_legacy_probe) {
229 /*
230 * If we have no .soc_probe() callback there's no way of using
231 * any legacy probe mechanism, as that cannot not be generic.
232 */
233 if (!pdata->soc_probe)
234 return -EINVAL;
235
236 dev_info_once(&pdev->dev, "audio-routing not found: using legacy probe\n");
237 } else {
238 ret = snd_soc_of_parse_audio_routing(card, "audio-routing");
239 if (ret)
240 return ret;
241 }
242
243 soc_card_data = devm_kzalloc(&pdev->dev, sizeof(*soc_card_data), GFP_KERNEL);
244 if (!soc_card_data)
245 return -ENOMEM;
246
247 soc_card_data->card_data = pdata->card_data;
248
249 jacks = devm_kcalloc(card->dev, soc_card_data->card_data->num_jacks,
250 sizeof(*jacks), GFP_KERNEL);
251 if (!jacks)
252 return -ENOMEM;
253
254 soc_card_data->card_data->jacks = jacks;
255
256 accdet_node = of_parse_phandle(pdev->dev.of_node, "mediatek,accdet", 0);
257 if (accdet_node) {
258 accdet_pdev = of_find_device_by_node(accdet_node);
259 if (accdet_pdev) {
260 accdet_comp = snd_soc_lookup_component(&accdet_pdev->dev, NULL);
261 if (accdet_comp)
262 soc_card_data->accdet = accdet_comp;
263 else
264 dev_err(&pdev->dev, "No sound component found from mediatek,accdet property\n");
265
266 put_device(&accdet_pdev->dev);
267 } else {
268 dev_err(&pdev->dev, "No device found from mediatek,accdet property\n");
269 }
270
271 of_node_put(accdet_node);
272 }
273
274 platform_node = of_parse_phandle(pdev->dev.of_node, "mediatek,platform", 0);
275 if (!platform_node)
276 return dev_err_probe(&pdev->dev, -EINVAL,
277 "Property mediatek,platform missing or invalid\n");
278
279 /* Check if this SoC has an Audio DSP */
280 if (pdata->sof_priv)
281 adsp_node = of_parse_phandle(pdev->dev.of_node, "mediatek,adsp", 0);
282 else
283 adsp_node = NULL;
284
285 if (adsp_node) {
286 if (of_property_present(pdev->dev.of_node, "mediatek,dai-link")) {
287 ret = mtk_sof_dailink_parse_of(card, pdev->dev.of_node,
288 "mediatek,dai-link",
289 card->dai_link, card->num_links);
290 if (ret) {
291 of_node_put(adsp_node);
292 of_node_put(platform_node);
293 return dev_err_probe(&pdev->dev, ret,
294 "Cannot parse mediatek,dai-link\n");
295 }
296 }
297
298 soc_card_data->sof_priv = pdata->sof_priv;
299 card->probe = mtk_sof_card_probe;
300 card->late_probe = mtk_sof_card_late_probe;
301 if (!card->topology_shortname_created) {
302 snprintf(card->topology_shortname, 32, "sof-%s", card->name);
303 card->topology_shortname_created = true;
304 }
305 card->name = card->topology_shortname;
306 }
307
308 /*
309 * Regardless of whether the ADSP is wanted and/or present in a machine
310 * specific device tree or not and regardless of whether any AFE_SOF
311 * link is present, we have to make sure that the platforms->of_node
312 * is not NULL, and set to either ADSP (adsp_node) or AFE (platform_node).
313 */
314 for_each_card_prelinks(card, i, dai_link) {
315 if (adsp_node && !strncmp(dai_link->name, "AFE_SOF", strlen("AFE_SOF")))
316 dai_link->platforms->of_node = adsp_node;
317 else if (!dai_link->platforms->name && !dai_link->platforms->of_node)
318 dai_link->platforms->of_node = platform_node;
319 }
320
321 if (!needs_legacy_probe) {
322 ret = parse_dai_link_info(card);
323 if (ret)
324 goto err_restore_dais;
325 } else {
326 if (adsp_node)
327 of_node_put(adsp_node);
328 of_node_put(platform_node);
329 }
330
331 if (pdata->soc_probe) {
332 ret = pdata->soc_probe(soc_card_data, needs_legacy_probe);
333 if (ret) {
334 if (!needs_legacy_probe)
335 clean_card_reference(card);
336 goto err_restore_dais;
337 }
338 }
339 snd_soc_card_set_drvdata(card, soc_card_data);
340
341 ret = devm_snd_soc_register_card(&pdev->dev, card);
342
343 if (!needs_legacy_probe)
344 clean_card_reference(card);
345
346 if (ret) {
347 dev_err_probe(&pdev->dev, ret, "Cannot register card\n");
348 goto err_restore_dais;
349 }
350
351 return 0;
352
353 err_restore_dais:
354 card->dai_link = orig_dai_link;
355 card->num_links = orig_num_links;
356 return ret;
357 }
358 EXPORT_SYMBOL_GPL(mtk_soundcard_common_probe);
359