1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * MediaTek ALSA SoC Audio DAI PCM I/F Control
4 *
5 * Copyright (c) 2020 MediaTek Inc.
6 * Author: Bicycle Tsai <bicycle.tsai@mediatek.com>
7 * Trevor Wu <trevor.wu@mediatek.com>
8 */
9
10 #include <linux/regmap.h>
11 #include <sound/pcm_params.h>
12 #include "mt8195-afe-clk.h"
13 #include "mt8195-afe-common.h"
14 #include "mt8195-reg.h"
15
16 enum {
17 MTK_DAI_PCM_FMT_I2S,
18 MTK_DAI_PCM_FMT_EIAJ,
19 MTK_DAI_PCM_FMT_MODEA,
20 MTK_DAI_PCM_FMT_MODEB,
21 };
22
23 enum {
24 MTK_DAI_PCM_CLK_A1SYS,
25 MTK_DAI_PCM_CLK_A2SYS,
26 MTK_DAI_PCM_CLK_26M_48K,
27 MTK_DAI_PCM_CLK_26M_441K,
28 };
29
30 struct mtk_dai_pcm_rate {
31 unsigned int rate;
32 unsigned int reg_value;
33 };
34
35 struct mtk_dai_pcmif_priv {
36 unsigned int slave_mode;
37 unsigned int lrck_inv;
38 unsigned int bck_inv;
39 unsigned int format;
40 };
41
42 static const struct mtk_dai_pcm_rate mtk_dai_pcm_rates[] = {
43 { .rate = 8000, .reg_value = 0, },
44 { .rate = 16000, .reg_value = 1, },
45 { .rate = 32000, .reg_value = 2, },
46 { .rate = 48000, .reg_value = 3, },
47 { .rate = 11025, .reg_value = 1, },
48 { .rate = 22050, .reg_value = 2, },
49 { .rate = 44100, .reg_value = 3, },
50 };
51
mtk_dai_pcm_mode(unsigned int rate)52 static int mtk_dai_pcm_mode(unsigned int rate)
53 {
54 int i;
55
56 for (i = 0; i < ARRAY_SIZE(mtk_dai_pcm_rates); i++)
57 if (mtk_dai_pcm_rates[i].rate == rate)
58 return mtk_dai_pcm_rates[i].reg_value;
59
60 return -EINVAL;
61 }
62
63 static const struct snd_kcontrol_new mtk_dai_pcm_o000_mix[] = {
64 SOC_DAPM_SINGLE_AUTODISABLE("I000 Switch", AFE_CONN0, 0, 1, 0),
65 SOC_DAPM_SINGLE_AUTODISABLE("I070 Switch", AFE_CONN0_2, 6, 1, 0),
66 };
67
68 static const struct snd_kcontrol_new mtk_dai_pcm_o001_mix[] = {
69 SOC_DAPM_SINGLE_AUTODISABLE("I001 Switch", AFE_CONN1, 1, 1, 0),
70 SOC_DAPM_SINGLE_AUTODISABLE("I071 Switch", AFE_CONN1_2, 7, 1, 0),
71 };
72
73 static const struct snd_soc_dapm_widget mtk_dai_pcm_widgets[] = {
74 SND_SOC_DAPM_MIXER("I002", SND_SOC_NOPM, 0, 0, NULL, 0),
75 SND_SOC_DAPM_MIXER("I003", SND_SOC_NOPM, 0, 0, NULL, 0),
76 SND_SOC_DAPM_MIXER("O000", SND_SOC_NOPM, 0, 0,
77 mtk_dai_pcm_o000_mix,
78 ARRAY_SIZE(mtk_dai_pcm_o000_mix)),
79 SND_SOC_DAPM_MIXER("O001", SND_SOC_NOPM, 0, 0,
80 mtk_dai_pcm_o001_mix,
81 ARRAY_SIZE(mtk_dai_pcm_o001_mix)),
82
83 SND_SOC_DAPM_SUPPLY("PCM_EN", PCM_INTF_CON1,
84 PCM_INTF_CON1_PCM_EN_SHIFT, 0, NULL, 0),
85
86 SND_SOC_DAPM_INPUT("PCM1_INPUT"),
87 SND_SOC_DAPM_OUTPUT("PCM1_OUTPUT"),
88
89 SND_SOC_DAPM_CLOCK_SUPPLY("aud_asrc11"),
90 SND_SOC_DAPM_CLOCK_SUPPLY("aud_asrc12"),
91 SND_SOC_DAPM_CLOCK_SUPPLY("aud_pcmif"),
92 };
93
94 static const struct snd_soc_dapm_route mtk_dai_pcm_routes[] = {
95 {"I002", NULL, "PCM1 Capture"},
96 {"I003", NULL, "PCM1 Capture"},
97
98 {"O000", "I000 Switch", "I000"},
99 {"O001", "I001 Switch", "I001"},
100
101 {"O000", "I070 Switch", "I070"},
102 {"O001", "I071 Switch", "I071"},
103
104 {"PCM1 Playback", NULL, "O000"},
105 {"PCM1 Playback", NULL, "O001"},
106
107 {"PCM1 Playback", NULL, "PCM_EN"},
108 {"PCM1 Playback", NULL, "aud_asrc12"},
109 {"PCM1 Playback", NULL, "aud_pcmif"},
110
111 {"PCM1 Capture", NULL, "PCM_EN"},
112 {"PCM1 Capture", NULL, "aud_asrc11"},
113 {"PCM1 Capture", NULL, "aud_pcmif"},
114
115 {"PCM1_OUTPUT", NULL, "PCM1 Playback"},
116 {"PCM1 Capture", NULL, "PCM1_INPUT"},
117 };
118
mtk_dai_pcm_configure(struct snd_pcm_substream * substream,struct snd_soc_dai * dai)119 static int mtk_dai_pcm_configure(struct snd_pcm_substream *substream,
120 struct snd_soc_dai *dai)
121 {
122 struct snd_pcm_runtime * const runtime = substream->runtime;
123 struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai);
124 struct mt8195_afe_private *afe_priv = afe->platform_priv;
125 struct mtk_dai_pcmif_priv *pcmif_priv = afe_priv->dai_priv[dai->id];
126 unsigned int slave_mode = pcmif_priv->slave_mode;
127 unsigned int lrck_inv = pcmif_priv->lrck_inv;
128 unsigned int bck_inv = pcmif_priv->bck_inv;
129 unsigned int fmt = pcmif_priv->format;
130 unsigned int bit_width = dai->sample_bits;
131 unsigned int val = 0;
132 unsigned int mask = 0;
133 int fs = 0;
134 int mode = 0;
135
136 /* sync freq mode */
137 fs = mt8195_afe_fs_timing(runtime->rate);
138 if (fs < 0)
139 return -EINVAL;
140 val |= PCM_INTF_CON2_SYNC_FREQ_MODE(fs);
141 mask |= PCM_INTF_CON2_SYNC_FREQ_MODE_MASK;
142
143 /* clk domain sel */
144 if (runtime->rate % 8000)
145 val |= PCM_INTF_CON2_CLK_DOMAIN_SEL(MTK_DAI_PCM_CLK_26M_441K);
146 else
147 val |= PCM_INTF_CON2_CLK_DOMAIN_SEL(MTK_DAI_PCM_CLK_26M_48K);
148 mask |= PCM_INTF_CON2_CLK_DOMAIN_SEL_MASK;
149
150 regmap_update_bits(afe->regmap, PCM_INTF_CON2, mask, val);
151
152 val = 0;
153 mask = 0;
154
155 /* pcm mode */
156 mode = mtk_dai_pcm_mode(runtime->rate);
157 if (mode < 0)
158 return -EINVAL;
159 val |= PCM_INTF_CON1_PCM_MODE(mode);
160 mask |= PCM_INTF_CON1_PCM_MODE_MASK;
161
162 /* pcm format */
163 val |= PCM_INTF_CON1_PCM_FMT(fmt);
164 mask |= PCM_INTF_CON1_PCM_FMT_MASK;
165
166 /* pcm sync length */
167 if (fmt == MTK_DAI_PCM_FMT_MODEA ||
168 fmt == MTK_DAI_PCM_FMT_MODEB)
169 val |= PCM_INTF_CON1_SYNC_LENGTH(1);
170 else
171 val |= PCM_INTF_CON1_SYNC_LENGTH(bit_width);
172 mask |= PCM_INTF_CON1_SYNC_LENGTH_MASK;
173
174 /* pcm bits, word length */
175 if (bit_width > 16) {
176 val |= PCM_INTF_CON1_PCM_24BIT;
177 val |= PCM_INTF_CON1_PCM_WLEN_64BCK;
178 } else {
179 val |= PCM_INTF_CON1_PCM_16BIT;
180 val |= PCM_INTF_CON1_PCM_WLEN_32BCK;
181 }
182 mask |= PCM_INTF_CON1_PCM_BIT_MASK;
183 mask |= PCM_INTF_CON1_PCM_WLEN_MASK;
184
185 /* master/slave */
186 if (!slave_mode) {
187 val |= PCM_INTF_CON1_PCM_MASTER;
188
189 if (lrck_inv)
190 val |= PCM_INTF_CON1_SYNC_OUT_INV;
191 if (bck_inv)
192 val |= PCM_INTF_CON1_BCLK_OUT_INV;
193 mask |= PCM_INTF_CON1_CLK_OUT_INV_MASK;
194 } else {
195 val |= PCM_INTF_CON1_PCM_SLAVE;
196
197 if (lrck_inv)
198 val |= PCM_INTF_CON1_SYNC_IN_INV;
199 if (bck_inv)
200 val |= PCM_INTF_CON1_BCLK_IN_INV;
201 mask |= PCM_INTF_CON1_CLK_IN_INV_MASK;
202
203 /* TODO: add asrc setting for slave mode */
204 }
205 mask |= PCM_INTF_CON1_PCM_M_S_MASK;
206
207 regmap_update_bits(afe->regmap, PCM_INTF_CON1, mask, val);
208
209 return 0;
210 }
211
212 /* dai ops */
mtk_dai_pcm_prepare(struct snd_pcm_substream * substream,struct snd_soc_dai * dai)213 static int mtk_dai_pcm_prepare(struct snd_pcm_substream *substream,
214 struct snd_soc_dai *dai)
215 {
216 struct snd_soc_dapm_widget *p = snd_soc_dai_get_widget_playback(dai);
217 struct snd_soc_dapm_widget *c = snd_soc_dai_get_widget_capture(dai);
218
219 dev_dbg(dai->dev, "%s(), id %d, stream %d, widget active p %d, c %d\n",
220 __func__, dai->id, substream->stream,
221 p->active, c->active);
222
223 if (p->active || c->active)
224 return 0;
225
226 return mtk_dai_pcm_configure(substream, dai);
227 }
228
mtk_dai_pcm_set_fmt(struct snd_soc_dai * dai,unsigned int fmt)229 static int mtk_dai_pcm_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
230 {
231 struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai);
232 struct mt8195_afe_private *afe_priv = afe->platform_priv;
233 struct mtk_dai_pcmif_priv *pcmif_priv = afe_priv->dai_priv[dai->id];
234
235 dev_dbg(dai->dev, "%s fmt 0x%x\n", __func__, fmt);
236
237 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
238 case SND_SOC_DAIFMT_I2S:
239 pcmif_priv->format = MTK_DAI_PCM_FMT_I2S;
240 break;
241 case SND_SOC_DAIFMT_DSP_A:
242 pcmif_priv->format = MTK_DAI_PCM_FMT_MODEA;
243 break;
244 case SND_SOC_DAIFMT_DSP_B:
245 pcmif_priv->format = MTK_DAI_PCM_FMT_MODEB;
246 break;
247 default:
248 return -EINVAL;
249 }
250
251 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
252 case SND_SOC_DAIFMT_NB_NF:
253 pcmif_priv->bck_inv = 0;
254 pcmif_priv->lrck_inv = 0;
255 break;
256 case SND_SOC_DAIFMT_NB_IF:
257 pcmif_priv->bck_inv = 0;
258 pcmif_priv->lrck_inv = 1;
259 break;
260 case SND_SOC_DAIFMT_IB_NF:
261 pcmif_priv->bck_inv = 1;
262 pcmif_priv->lrck_inv = 0;
263 break;
264 case SND_SOC_DAIFMT_IB_IF:
265 pcmif_priv->bck_inv = 1;
266 pcmif_priv->lrck_inv = 1;
267 break;
268 default:
269 return -EINVAL;
270 }
271
272 switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
273 case SND_SOC_DAIFMT_BC_FC:
274 pcmif_priv->slave_mode = 1;
275 break;
276 case SND_SOC_DAIFMT_BP_FP:
277 pcmif_priv->slave_mode = 0;
278 break;
279 default:
280 return -EINVAL;
281 }
282
283 return 0;
284 }
285
286 static const struct snd_soc_dai_ops mtk_dai_pcm_ops = {
287 .prepare = mtk_dai_pcm_prepare,
288 .set_fmt = mtk_dai_pcm_set_fmt,
289 };
290
291 /* dai driver */
292 #define MTK_PCM_RATES (SNDRV_PCM_RATE_8000_48000)
293
294 #define MTK_PCM_FORMATS (SNDRV_PCM_FMTBIT_S16_LE |\
295 SNDRV_PCM_FMTBIT_S24_LE |\
296 SNDRV_PCM_FMTBIT_S32_LE)
297
298 static struct snd_soc_dai_driver mtk_dai_pcm_driver[] = {
299 {
300 .name = "PCM1",
301 .id = MT8195_AFE_IO_PCM,
302 .playback = {
303 .stream_name = "PCM1 Playback",
304 .channels_min = 1,
305 .channels_max = 2,
306 .rates = MTK_PCM_RATES,
307 .formats = MTK_PCM_FORMATS,
308 },
309 .capture = {
310 .stream_name = "PCM1 Capture",
311 .channels_min = 1,
312 .channels_max = 2,
313 .rates = MTK_PCM_RATES,
314 .formats = MTK_PCM_FORMATS,
315 },
316 .ops = &mtk_dai_pcm_ops,
317 .symmetric_rate = 1,
318 .symmetric_sample_bits = 1,
319 },
320 };
321
init_pcmif_priv_data(struct mtk_base_afe * afe)322 static int init_pcmif_priv_data(struct mtk_base_afe *afe)
323 {
324 struct mt8195_afe_private *afe_priv = afe->platform_priv;
325 struct mtk_dai_pcmif_priv *pcmif_priv;
326
327 pcmif_priv = devm_kzalloc(afe->dev, sizeof(struct mtk_dai_pcmif_priv),
328 GFP_KERNEL);
329 if (!pcmif_priv)
330 return -ENOMEM;
331
332 afe_priv->dai_priv[MT8195_AFE_IO_PCM] = pcmif_priv;
333 return 0;
334 }
335
mt8195_dai_pcm_register(struct mtk_base_afe * afe)336 int mt8195_dai_pcm_register(struct mtk_base_afe *afe)
337 {
338 struct mtk_base_afe_dai *dai;
339
340 dai = devm_kzalloc(afe->dev, sizeof(*dai), GFP_KERNEL);
341 if (!dai)
342 return -ENOMEM;
343
344 list_add(&dai->list, &afe->sub_dais);
345
346 dai->dai_drivers = mtk_dai_pcm_driver;
347 dai->num_dai_drivers = ARRAY_SIZE(mtk_dai_pcm_driver);
348
349 dai->dapm_widgets = mtk_dai_pcm_widgets;
350 dai->num_dapm_widgets = ARRAY_SIZE(mtk_dai_pcm_widgets);
351 dai->dapm_routes = mtk_dai_pcm_routes;
352 dai->num_dapm_routes = ARRAY_SIZE(mtk_dai_pcm_routes);
353
354 return init_pcmif_priv_data(afe);
355 }
356