1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * MediaTek 8365 ALSA SoC Audio DAI PCM Control
4 *
5 * Copyright (c) 2024 MediaTek Inc.
6 * Authors: Jia Zeng <jia.zeng@mediatek.com>
7 * Alexandre Mergnat <amergnat@baylibre.com>
8 */
9
10 #include <linux/bitops.h>
11 #include <linux/regmap.h>
12 #include <sound/pcm_params.h>
13 #include "mt8365-afe-clk.h"
14 #include "mt8365-afe-common.h"
15
16 struct mt8365_pcm_intf_data {
17 bool slave_mode;
18 bool lrck_inv;
19 bool bck_inv;
20 unsigned int format;
21 };
22
23 /* DAI Drivers */
24
25 static void mt8365_dai_enable_pcm1(struct mtk_base_afe *afe)
26 {
27 regmap_update_bits(afe->regmap, PCM_INTF_CON1,
28 PCM_INTF_CON1_EN, PCM_INTF_CON1_EN);
29 }
30
31 static void mt8365_dai_disable_pcm1(struct mtk_base_afe *afe)
32 {
33 regmap_update_bits(afe->regmap, PCM_INTF_CON1,
34 PCM_INTF_CON1_EN, 0x0);
35 }
36
37 static int mt8365_dai_configure_pcm1(struct snd_pcm_substream *substream,
38 struct snd_soc_dai *dai)
39 {
40 struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai);
41 struct mt8365_afe_private *afe_priv = afe->platform_priv;
42 struct mt8365_pcm_intf_data *pcm_priv = afe_priv->dai_priv[MT8365_AFE_IO_PCM1];
43 bool slave_mode = pcm_priv->slave_mode;
44 bool lrck_inv = pcm_priv->lrck_inv;
45 bool bck_inv = pcm_priv->bck_inv;
46 unsigned int fmt = pcm_priv->format;
47 unsigned int bit_width = dai->sample_bits;
48 unsigned int val = 0;
49
50 if (!slave_mode) {
51 val |= PCM_INTF_CON1_MASTER_MODE |
52 PCM_INTF_CON1_BYPASS_ASRC;
53
54 if (lrck_inv)
55 val |= PCM_INTF_CON1_SYNC_OUT_INV;
56 if (bck_inv)
57 val |= PCM_INTF_CON1_BCLK_OUT_INV;
58 } else {
59 val |= PCM_INTF_CON1_SLAVE_MODE;
60
61 if (lrck_inv)
62 val |= PCM_INTF_CON1_SYNC_IN_INV;
63 if (bck_inv)
64 val |= PCM_INTF_CON1_BCLK_IN_INV;
65
66 /* TODO: add asrc setting */
67 }
68
69 val |= FIELD_PREP(PCM_INTF_CON1_FORMAT_MASK, fmt);
70
71 if (fmt == MT8365_PCM_FORMAT_PCMA ||
72 fmt == MT8365_PCM_FORMAT_PCMB)
73 val |= PCM_INTF_CON1_SYNC_LEN(1);
74 else
75 val |= PCM_INTF_CON1_SYNC_LEN(bit_width);
76
77 switch (substream->runtime->rate) {
78 case 48000:
79 val |= PCM_INTF_CON1_FS_48K;
80 break;
81 case 32000:
82 val |= PCM_INTF_CON1_FS_32K;
83 break;
84 case 16000:
85 val |= PCM_INTF_CON1_FS_16K;
86 break;
87 case 8000:
88 val |= PCM_INTF_CON1_FS_8K;
89 break;
90 default:
91 return -EINVAL;
92 }
93
94 if (bit_width > 16)
95 val |= PCM_INTF_CON1_24BIT | PCM_INTF_CON1_64BCK;
96 else
97 val |= PCM_INTF_CON1_16BIT | PCM_INTF_CON1_32BCK;
98
99 val |= PCM_INTF_CON1_EXT_MODEM;
100
101 regmap_update_bits(afe->regmap, PCM_INTF_CON1,
102 PCM_INTF_CON1_CONFIG_MASK, val);
103
104 return 0;
105 }
106
107 static int mt8365_dai_pcm1_startup(struct snd_pcm_substream *substream,
108 struct snd_soc_dai *dai)
109 {
110 struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai);
111
112 if (snd_soc_dai_active(dai))
113 return 0;
114
115 mt8365_afe_enable_main_clk(afe);
116
117 return 0;
118 }
119
120 static void mt8365_dai_pcm1_shutdown(struct snd_pcm_substream *substream,
121 struct snd_soc_dai *dai)
122 {
123 struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai);
124
125 if (snd_soc_dai_active(dai))
126 return;
127
128 mt8365_dai_disable_pcm1(afe);
129 mt8365_afe_disable_main_clk(afe);
130 }
131
132 static int mt8365_dai_pcm1_prepare(struct snd_pcm_substream *substream,
133 struct snd_soc_dai *dai)
134 {
135 struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai);
136 int ret;
137
138 if ((snd_soc_dai_stream_active(dai, SNDRV_PCM_STREAM_PLAYBACK) +
139 snd_soc_dai_stream_active(dai, SNDRV_PCM_STREAM_CAPTURE)) > 1) {
140 dev_info(afe->dev, "%s '%s' active(%u-%u) already\n",
141 __func__, snd_pcm_stream_str(substream),
142 snd_soc_dai_stream_active(dai, SNDRV_PCM_STREAM_PLAYBACK),
143 snd_soc_dai_stream_active(dai, SNDRV_PCM_STREAM_CAPTURE));
144 return 0;
145 }
146
147 ret = mt8365_dai_configure_pcm1(substream, dai);
148 if (ret)
149 return ret;
150
151 mt8365_dai_enable_pcm1(afe);
152
153 return 0;
154 }
155
156 static int mt8365_dai_pcm1_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
157 {
158 struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai);
159 struct mt8365_afe_private *afe_priv = afe->platform_priv;
160 struct mt8365_pcm_intf_data *pcm_priv = afe_priv->dai_priv[MT8365_AFE_IO_PCM1];
161
162 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
163 case SND_SOC_DAIFMT_I2S:
164 pcm_priv->format = MT8365_PCM_FORMAT_I2S;
165 break;
166 default:
167 return -EINVAL;
168 }
169
170 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
171 case SND_SOC_DAIFMT_NB_NF:
172 pcm_priv->bck_inv = false;
173 pcm_priv->lrck_inv = false;
174 break;
175 case SND_SOC_DAIFMT_NB_IF:
176 pcm_priv->bck_inv = false;
177 pcm_priv->lrck_inv = true;
178 break;
179 case SND_SOC_DAIFMT_IB_NF:
180 pcm_priv->bck_inv = true;
181 pcm_priv->lrck_inv = false;
182 break;
183 case SND_SOC_DAIFMT_IB_IF:
184 pcm_priv->bck_inv = true;
185 pcm_priv->lrck_inv = true;
186 break;
187 default:
188 return -EINVAL;
189 }
190
191 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
192 case SND_SOC_DAIFMT_CBM_CFM:
193 pcm_priv->slave_mode = true;
194 break;
195 case SND_SOC_DAIFMT_CBS_CFS:
196 pcm_priv->slave_mode = false;
197 break;
198 default:
199 return -EINVAL;
200 }
201
202 return 0;
203 }
204
205 static const struct snd_soc_dai_ops mt8365_dai_pcm1_ops = {
206 .startup = mt8365_dai_pcm1_startup,
207 .shutdown = mt8365_dai_pcm1_shutdown,
208 .prepare = mt8365_dai_pcm1_prepare,
209 .set_fmt = mt8365_dai_pcm1_set_fmt,
210 };
211
212 static struct snd_soc_dai_driver mtk_dai_pcm_driver[] = {
213 {
214 .name = "PCM1",
215 .id = MT8365_AFE_IO_PCM1,
216 .playback = {
217 .stream_name = "PCM1 Playback",
218 .channels_min = 1,
219 .channels_max = 2,
220 .rates = SNDRV_PCM_RATE_8000 |
221 SNDRV_PCM_RATE_16000 |
222 SNDRV_PCM_RATE_32000 |
223 SNDRV_PCM_RATE_48000,
224 .formats = SNDRV_PCM_FMTBIT_S16_LE |
225 SNDRV_PCM_FMTBIT_S32_LE,
226 },
227 .capture = {
228 .stream_name = "PCM1 Capture",
229 .channels_min = 1,
230 .channels_max = 2,
231 .rates = SNDRV_PCM_RATE_8000 |
232 SNDRV_PCM_RATE_16000 |
233 SNDRV_PCM_RATE_32000 |
234 SNDRV_PCM_RATE_48000,
235 .formats = SNDRV_PCM_FMTBIT_S16_LE |
236 SNDRV_PCM_FMTBIT_S32_LE,
237 },
238 .ops = &mt8365_dai_pcm1_ops,
239 .symmetric_rate = 1,
240 .symmetric_sample_bits = 1,
241 }
242 };
243
244 /* DAI widget */
245
246 static const struct snd_soc_dapm_widget mtk_dai_pcm_widgets[] = {
247 SND_SOC_DAPM_OUTPUT("PCM1 Out"),
248 SND_SOC_DAPM_INPUT("PCM1 In"),
249 };
250
251 /* DAI route */
252
253 static const struct snd_soc_dapm_route mtk_dai_pcm_routes[] = {
254 {"PCM1 Playback", NULL, "O07"},
255 {"PCM1 Playback", NULL, "O08"},
256 {"PCM1 Out", NULL, "PCM1 Playback"},
257
258 {"I09", NULL, "PCM1 Capture"},
259 {"I22", NULL, "PCM1 Capture"},
260 {"PCM1 Capture", NULL, "PCM1 In"},
261 };
262
263 static int init_pcmif_priv_data(struct mtk_base_afe *afe)
264 {
265 struct mt8365_afe_private *afe_priv = afe->platform_priv;
266 struct mt8365_pcm_intf_data *pcmif_priv;
267
268 pcmif_priv = devm_kzalloc(afe->dev, sizeof(struct mt8365_pcm_intf_data),
269 GFP_KERNEL);
270 if (!pcmif_priv)
271 return -ENOMEM;
272
273 afe_priv->dai_priv[MT8365_AFE_IO_PCM1] = pcmif_priv;
274 return 0;
275 }
276
277 int mt8365_dai_pcm_register(struct mtk_base_afe *afe)
278 {
279 struct mtk_base_afe_dai *dai;
280
281 dai = devm_kzalloc(afe->dev, sizeof(*dai), GFP_KERNEL);
282 if (!dai)
283 return -ENOMEM;
284
285 list_add(&dai->list, &afe->sub_dais);
286 dai->dai_drivers = mtk_dai_pcm_driver;
287 dai->num_dai_drivers = ARRAY_SIZE(mtk_dai_pcm_driver);
288 dai->dapm_widgets = mtk_dai_pcm_widgets;
289 dai->num_dapm_widgets = ARRAY_SIZE(mtk_dai_pcm_widgets);
290 dai->dapm_routes = mtk_dai_pcm_routes;
291 dai->num_dapm_routes = ARRAY_SIZE(mtk_dai_pcm_routes);
292 return init_pcmif_priv_data(afe);
293 }
294
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