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6#include <linux/module.h>
7#include <linux/of_platform.h>
8#include <sound/soc.h>
9#include <sound/soc-dai.h>
10
11#include "axg-tdm.h"
12#include "meson-card.h"
13
14struct axg_dai_link_tdm_mask {
15 u32 tx;
16 u32 rx;
17};
18
19struct axg_dai_link_tdm_data {
20 unsigned int mclk_fs;
21 unsigned int slots;
22 unsigned int slot_width;
23 u32 *tx_mask;
24 u32 *rx_mask;
25 struct axg_dai_link_tdm_mask *codec_masks;
26};
27
28
29
30
31
32static const struct snd_soc_pcm_stream codec_params = {
33 .formats = SNDRV_PCM_FMTBIT_S24_LE,
34 .rate_min = 5525,
35 .rate_max = 192000,
36 .channels_min = 1,
37 .channels_max = 8,
38};
39
40static int axg_card_tdm_be_hw_params(struct snd_pcm_substream *substream,
41 struct snd_pcm_hw_params *params)
42{
43 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
44 struct meson_card *priv = snd_soc_card_get_drvdata(rtd->card);
45 struct axg_dai_link_tdm_data *be =
46 (struct axg_dai_link_tdm_data *)priv->link_data[rtd->num];
47
48 return meson_card_i2s_set_sysclk(substream, params, be->mclk_fs);
49}
50
51static const struct snd_soc_ops axg_card_tdm_be_ops = {
52 .hw_params = axg_card_tdm_be_hw_params,
53};
54
55static int axg_card_tdm_dai_init(struct snd_soc_pcm_runtime *rtd)
56{
57 struct meson_card *priv = snd_soc_card_get_drvdata(rtd->card);
58 struct axg_dai_link_tdm_data *be =
59 (struct axg_dai_link_tdm_data *)priv->link_data[rtd->num];
60 struct snd_soc_dai *codec_dai;
61 int ret, i;
62
63 for_each_rtd_codec_dais(rtd, i, codec_dai) {
64 ret = snd_soc_dai_set_tdm_slot(codec_dai,
65 be->codec_masks[i].tx,
66 be->codec_masks[i].rx,
67 be->slots, be->slot_width);
68 if (ret && ret != -ENOTSUPP) {
69 dev_err(codec_dai->dev,
70 "setting tdm link slots failed\n");
71 return ret;
72 }
73 }
74
75 ret = axg_tdm_set_tdm_slots(asoc_rtd_to_cpu(rtd, 0), be->tx_mask, be->rx_mask,
76 be->slots, be->slot_width);
77 if (ret) {
78 dev_err(asoc_rtd_to_cpu(rtd, 0)->dev, "setting tdm link slots failed\n");
79 return ret;
80 }
81
82 return 0;
83}
84
85static int axg_card_tdm_dai_lb_init(struct snd_soc_pcm_runtime *rtd)
86{
87 struct meson_card *priv = snd_soc_card_get_drvdata(rtd->card);
88 struct axg_dai_link_tdm_data *be =
89 (struct axg_dai_link_tdm_data *)priv->link_data[rtd->num];
90 int ret;
91
92
93 ret = axg_tdm_set_tdm_slots(asoc_rtd_to_cpu(rtd, 0), NULL, be->tx_mask,
94 be->slots, be->slot_width);
95 if (ret) {
96 dev_err(asoc_rtd_to_cpu(rtd, 0)->dev, "setting tdm link slots failed\n");
97 return ret;
98 }
99
100 return 0;
101}
102
103static int axg_card_add_tdm_loopback(struct snd_soc_card *card,
104 int *index)
105{
106 struct meson_card *priv = snd_soc_card_get_drvdata(card);
107 struct snd_soc_dai_link *pad = &card->dai_link[*index];
108 struct snd_soc_dai_link *lb;
109 struct snd_soc_dai_link_component *dlc;
110 int ret;
111
112
113 ret = meson_card_reallocate_links(card, card->num_links + 1);
114 if (ret)
115 return ret;
116
117 lb = &card->dai_link[*index + 1];
118
119 lb->name = devm_kasprintf(card->dev, GFP_KERNEL, "%s-lb", pad->name);
120 if (!lb->name)
121 return -ENOMEM;
122
123 dlc = devm_kzalloc(card->dev, 2 * sizeof(*dlc), GFP_KERNEL);
124 if (!dlc)
125 return -ENOMEM;
126
127 lb->cpus = &dlc[0];
128 lb->codecs = &dlc[1];
129 lb->num_cpus = 1;
130 lb->num_codecs = 1;
131
132 lb->stream_name = lb->name;
133 lb->cpus->of_node = pad->cpus->of_node;
134 lb->cpus->dai_name = "TDM Loopback";
135 lb->codecs->name = "snd-soc-dummy";
136 lb->codecs->dai_name = "snd-soc-dummy-dai";
137 lb->dpcm_capture = 1;
138 lb->no_pcm = 1;
139 lb->ops = &axg_card_tdm_be_ops;
140 lb->init = axg_card_tdm_dai_lb_init;
141
142
143 priv->link_data[*index + 1] = priv->link_data[*index];
144
145
146
147
148
149 of_node_get(lb->cpus->of_node);
150
151
152 *index += 1;
153
154 return 0;
155}
156
157static int axg_card_parse_cpu_tdm_slots(struct snd_soc_card *card,
158 struct snd_soc_dai_link *link,
159 struct device_node *node,
160 struct axg_dai_link_tdm_data *be)
161{
162 char propname[32];
163 u32 tx, rx;
164 int i;
165
166 be->tx_mask = devm_kcalloc(card->dev, AXG_TDM_NUM_LANES,
167 sizeof(*be->tx_mask), GFP_KERNEL);
168 be->rx_mask = devm_kcalloc(card->dev, AXG_TDM_NUM_LANES,
169 sizeof(*be->rx_mask), GFP_KERNEL);
170 if (!be->tx_mask || !be->rx_mask)
171 return -ENOMEM;
172
173 for (i = 0, tx = 0; i < AXG_TDM_NUM_LANES; i++) {
174 snprintf(propname, 32, "dai-tdm-slot-tx-mask-%d", i);
175 snd_soc_of_get_slot_mask(node, propname, &be->tx_mask[i]);
176 tx = max(tx, be->tx_mask[i]);
177 }
178
179
180 if (!tx)
181 link->dpcm_playback = 0;
182
183 for (i = 0, rx = 0; i < AXG_TDM_NUM_LANES; i++) {
184 snprintf(propname, 32, "dai-tdm-slot-rx-mask-%d", i);
185 snd_soc_of_get_slot_mask(node, propname, &be->rx_mask[i]);
186 rx = max(rx, be->rx_mask[i]);
187 }
188
189
190 if (!rx)
191 link->dpcm_capture = 0;
192
193
194 if (!tx && !rx) {
195 dev_err(card->dev, "tdm link has no cpu slots\n");
196 return -EINVAL;
197 }
198
199 of_property_read_u32(node, "dai-tdm-slot-num", &be->slots);
200 if (!be->slots) {
201
202
203
204
205 be->slots = fls(max(tx, rx));
206 } else if (be->slots < fls(max(tx, rx)) || be->slots > 32) {
207
208
209
210
211 dev_err(card->dev, "bad slot number\n");
212 return -EINVAL;
213 }
214
215 of_property_read_u32(node, "dai-tdm-slot-width", &be->slot_width);
216
217 return 0;
218}
219
220static int axg_card_parse_codecs_masks(struct snd_soc_card *card,
221 struct snd_soc_dai_link *link,
222 struct device_node *node,
223 struct axg_dai_link_tdm_data *be)
224{
225 struct axg_dai_link_tdm_mask *codec_mask;
226 struct device_node *np;
227
228 codec_mask = devm_kcalloc(card->dev, link->num_codecs,
229 sizeof(*codec_mask), GFP_KERNEL);
230 if (!codec_mask)
231 return -ENOMEM;
232
233 be->codec_masks = codec_mask;
234
235 for_each_child_of_node(node, np) {
236 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-rx-mask",
237 &codec_mask->rx);
238 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-tx-mask",
239 &codec_mask->tx);
240
241 codec_mask++;
242 }
243
244 return 0;
245}
246
247static int axg_card_parse_tdm(struct snd_soc_card *card,
248 struct device_node *node,
249 int *index)
250{
251 struct meson_card *priv = snd_soc_card_get_drvdata(card);
252 struct snd_soc_dai_link *link = &card->dai_link[*index];
253 struct axg_dai_link_tdm_data *be;
254 int ret;
255
256
257 be = devm_kzalloc(card->dev, sizeof(*be), GFP_KERNEL);
258 if (!be)
259 return -ENOMEM;
260 priv->link_data[*index] = be;
261
262
263 link->ops = &axg_card_tdm_be_ops;
264 link->init = axg_card_tdm_dai_init;
265 link->dai_fmt = meson_card_parse_daifmt(node, link->cpus->of_node);
266
267 of_property_read_u32(node, "mclk-fs", &be->mclk_fs);
268
269 ret = axg_card_parse_cpu_tdm_slots(card, link, node, be);
270 if (ret) {
271 dev_err(card->dev, "error parsing tdm link slots\n");
272 return ret;
273 }
274
275 ret = axg_card_parse_codecs_masks(card, link, node, be);
276 if (ret)
277 return ret;
278
279
280 if (link->dpcm_playback) {
281 ret = axg_card_add_tdm_loopback(card, index);
282 if (ret)
283 return ret;
284 }
285
286 return 0;
287}
288
289static int axg_card_cpu_is_capture_fe(struct device_node *np)
290{
291 return of_device_is_compatible(np, DT_PREFIX "axg-toddr");
292}
293
294static int axg_card_cpu_is_playback_fe(struct device_node *np)
295{
296 return of_device_is_compatible(np, DT_PREFIX "axg-frddr");
297}
298
299static int axg_card_cpu_is_tdm_iface(struct device_node *np)
300{
301 return of_device_is_compatible(np, DT_PREFIX "axg-tdm-iface");
302}
303
304static int axg_card_cpu_is_codec(struct device_node *np)
305{
306 return of_device_is_compatible(np, DT_PREFIX "g12a-tohdmitx") ||
307 of_device_is_compatible(np, DT_PREFIX "g12a-toacodec");
308}
309
310static int axg_card_add_link(struct snd_soc_card *card, struct device_node *np,
311 int *index)
312{
313 struct snd_soc_dai_link *dai_link = &card->dai_link[*index];
314 struct snd_soc_dai_link_component *cpu;
315 int ret;
316
317 cpu = devm_kzalloc(card->dev, sizeof(*cpu), GFP_KERNEL);
318 if (!cpu)
319 return -ENOMEM;
320
321 dai_link->cpus = cpu;
322 dai_link->num_cpus = 1;
323
324 ret = meson_card_parse_dai(card, np, &dai_link->cpus->of_node,
325 &dai_link->cpus->dai_name);
326 if (ret)
327 return ret;
328
329 if (axg_card_cpu_is_playback_fe(dai_link->cpus->of_node))
330 return meson_card_set_fe_link(card, dai_link, np, true);
331 else if (axg_card_cpu_is_capture_fe(dai_link->cpus->of_node))
332 return meson_card_set_fe_link(card, dai_link, np, false);
333
334
335 ret = meson_card_set_be_link(card, dai_link, np);
336 if (ret)
337 return ret;
338
339 if (axg_card_cpu_is_codec(dai_link->cpus->of_node)) {
340 dai_link->params = &codec_params;
341 } else {
342 dai_link->no_pcm = 1;
343 snd_soc_dai_link_set_capabilities(dai_link);
344 if (axg_card_cpu_is_tdm_iface(dai_link->cpus->of_node))
345 ret = axg_card_parse_tdm(card, np, index);
346 }
347
348 return ret;
349}
350
351static const struct meson_card_match_data axg_card_match_data = {
352 .add_link = axg_card_add_link,
353};
354
355static const struct of_device_id axg_card_of_match[] = {
356 {
357 .compatible = "amlogic,axg-sound-card",
358 .data = &axg_card_match_data,
359 }, {}
360};
361MODULE_DEVICE_TABLE(of, axg_card_of_match);
362
363static struct platform_driver axg_card_pdrv = {
364 .probe = meson_card_probe,
365 .remove = meson_card_remove,
366 .driver = {
367 .name = "axg-sound-card",
368 .of_match_table = axg_card_of_match,
369 },
370};
371module_platform_driver(axg_card_pdrv);
372
373MODULE_DESCRIPTION("Amlogic AXG ALSA machine driver");
374MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
375MODULE_LICENSE("GPL v2");
376
