1// SPDX-License-Identifier: GPL-2.0
2/*
3 * MediaTek 8365 ALSA SoC Audio DAI DMIC 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
16struct mt8365_dmic_data {
17 bool two_wire_mode;
18 unsigned int clk_phase_sel_ch1;
19 unsigned int clk_phase_sel_ch2;
20 bool iir_on;
21 unsigned int irr_mode;
22 unsigned int dmic_mode;
23 unsigned int dmic_channel;
24};
25
26static int get_chan_reg(unsigned int channel)
27{
28 switch (channel) {
29 case 8:
30 fallthrough;
31 case 7:
32 return AFE_DMIC3_UL_SRC_CON0;
33 case 6:
34 fallthrough;
35 case 5:
36 return AFE_DMIC2_UL_SRC_CON0;
37 case 4:
38 fallthrough;
39 case 3:
40 return AFE_DMIC1_UL_SRC_CON0;
41 case 2:
42 fallthrough;
43 case 1:
44 return AFE_DMIC0_UL_SRC_CON0;
45 default:
46 return -EINVAL;
47 }
48}
49
50/* DAI Drivers */
51
52static void audio_dmic_adda_enable(struct mtk_base_afe *afe)
53{
54 mt8365_dai_enable_adda_on(afe);
55 regmap_update_bits(map: afe->regmap, AFE_ADDA_UL_DL_CON0,
56 AFE_ADDA_UL_DL_DMIC_CLKDIV_ON,
57 AFE_ADDA_UL_DL_DMIC_CLKDIV_ON);
58}
59
60static void audio_dmic_adda_disable(struct mtk_base_afe *afe)
61{
62 regmap_update_bits(map: afe->regmap, AFE_ADDA_UL_DL_CON0,
63 AFE_ADDA_UL_DL_DMIC_CLKDIV_ON,
64 val: ~AFE_ADDA_UL_DL_DMIC_CLKDIV_ON);
65 mt8365_dai_disable_adda_on(afe);
66}
67
68static void mt8365_dai_enable_dmic(struct mtk_base_afe *afe,
69 struct snd_pcm_substream *substream,
70 struct snd_soc_dai *dai)
71{
72 struct mt8365_afe_private *afe_priv = afe->platform_priv;
73 struct mt8365_dmic_data *dmic_data = afe_priv->dai_priv[MT8365_AFE_IO_DMIC];
74 unsigned int val_mask;
75 int reg = get_chan_reg(channel: dmic_data->dmic_channel);
76
77 if (reg < 0)
78 return;
79
80 /* val and mask will be always same to enable */
81 val_mask = DMIC_TOP_CON_CH1_ON |
82 DMIC_TOP_CON_CH2_ON |
83 DMIC_TOP_CON_SRC_ON;
84
85 regmap_update_bits(map: afe->regmap, reg, mask: val_mask, val: val_mask);
86}
87
88static void mt8365_dai_disable_dmic(struct mtk_base_afe *afe,
89 struct snd_pcm_substream *substream,
90 struct snd_soc_dai *dai)
91{
92 struct mt8365_afe_private *afe_priv = afe->platform_priv;
93 struct mt8365_dmic_data *dmic_data = afe_priv->dai_priv[MT8365_AFE_IO_DMIC];
94 unsigned int mask;
95 int reg = get_chan_reg(channel: dmic_data->dmic_channel);
96
97 if (reg < 0)
98 return;
99
100 dev_dbg(afe->dev, "%s dmic_channel %d\n", __func__, dmic_data->dmic_channel);
101
102 mask = DMIC_TOP_CON_CH1_ON |
103 DMIC_TOP_CON_CH2_ON |
104 DMIC_TOP_CON_SRC_ON |
105 DMIC_TOP_CON_SDM3_LEVEL_MODE;
106
107 /* Set all masked values to 0 */
108 regmap_update_bits(map: afe->regmap, reg, mask, val: 0);
109}
110
111static int mt8365_dai_configure_dmic(struct mtk_base_afe *afe,
112 struct snd_pcm_substream *substream,
113 struct snd_soc_dai *dai)
114{
115 struct mt8365_afe_private *afe_priv = afe->platform_priv;
116 struct mt8365_dmic_data *dmic_data = afe_priv->dai_priv[MT8365_AFE_IO_DMIC];
117 bool two_wire_mode = dmic_data->two_wire_mode;
118 unsigned int clk_phase_sel_ch1 = dmic_data->clk_phase_sel_ch1;
119 unsigned int clk_phase_sel_ch2 = dmic_data->clk_phase_sel_ch2;
120 unsigned int val = 0;
121 unsigned int rate = dai->symmetric_rate;
122 int reg = get_chan_reg(channel: dai->symmetric_channels);
123
124 if (reg < 0)
125 return -EINVAL;
126
127 dmic_data->dmic_channel = dai->symmetric_channels;
128
129 val |= DMIC_TOP_CON_SDM3_LEVEL_MODE;
130
131 if (two_wire_mode) {
132 val |= DMIC_TOP_CON_TWO_WIRE_MODE;
133 } else {
134 val |= FIELD_PREP(DMIC_TOP_CON_CK_PHASE_SEL_CH1,
135 clk_phase_sel_ch1);
136 val |= FIELD_PREP(DMIC_TOP_CON_CK_PHASE_SEL_CH2,
137 clk_phase_sel_ch2);
138 }
139
140 switch (rate) {
141 case 48000:
142 val |= DMIC_TOP_CON_VOICE_MODE_48K;
143 break;
144 case 32000:
145 val |= DMIC_TOP_CON_VOICE_MODE_32K;
146 break;
147 case 16000:
148 val |= DMIC_TOP_CON_VOICE_MODE_16K;
149 break;
150 case 8000:
151 val |= DMIC_TOP_CON_VOICE_MODE_8K;
152 break;
153 default:
154 return -EINVAL;
155 }
156
157 regmap_update_bits(map: afe->regmap, reg, DMIC_TOP_CON_CONFIG_MASK, val);
158
159 return 0;
160}
161
162static int mt8365_dai_dmic_startup(struct snd_pcm_substream *substream,
163 struct snd_soc_dai *dai)
164{
165 struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai);
166
167 mt8365_afe_enable_main_clk(afe);
168
169 mt8365_afe_enable_top_cg(afe, cg_type: MT8365_TOP_CG_DMIC0_ADC);
170 mt8365_afe_enable_top_cg(afe, cg_type: MT8365_TOP_CG_DMIC1_ADC);
171 mt8365_afe_enable_top_cg(afe, cg_type: MT8365_TOP_CG_DMIC2_ADC);
172 mt8365_afe_enable_top_cg(afe, cg_type: MT8365_TOP_CG_DMIC3_ADC);
173
174 audio_dmic_adda_enable(afe);
175
176 return 0;
177}
178
179static void mt8365_dai_dmic_shutdown(struct snd_pcm_substream *substream,
180 struct snd_soc_dai *dai)
181{
182 struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai);
183
184 mt8365_dai_disable_dmic(afe, substream, dai);
185 audio_dmic_adda_disable(afe);
186 /* HW Request delay 125us before CG off */
187 usleep_range(min: 125, max: 300);
188 mt8365_afe_disable_top_cg(afe, cg_type: MT8365_TOP_CG_DMIC3_ADC);
189 mt8365_afe_disable_top_cg(afe, cg_type: MT8365_TOP_CG_DMIC2_ADC);
190 mt8365_afe_disable_top_cg(afe, cg_type: MT8365_TOP_CG_DMIC1_ADC);
191 mt8365_afe_disable_top_cg(afe, cg_type: MT8365_TOP_CG_DMIC0_ADC);
192
193 mt8365_afe_disable_main_clk(afe);
194}
195
196static int mt8365_dai_dmic_prepare(struct snd_pcm_substream *substream,
197 struct snd_soc_dai *dai)
198{
199 struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai);
200
201 mt8365_dai_configure_dmic(afe, substream, dai);
202 mt8365_dai_enable_dmic(afe, substream, dai);
203
204 return 0;
205}
206
207static const struct snd_soc_dai_ops mt8365_afe_dmic_ops = {
208 .startup = mt8365_dai_dmic_startup,
209 .shutdown = mt8365_dai_dmic_shutdown,
210 .prepare = mt8365_dai_dmic_prepare,
211};
212
213static struct snd_soc_dai_driver mtk_dai_dmic_driver[] = {
214 {
215 .name = "DMIC",
216 .id = MT8365_AFE_IO_DMIC,
217 .capture = {
218 .stream_name = "DMIC Capture",
219 .channels_min = 1,
220 .channels_max = 8,
221 .rates = 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 .ops = &mt8365_afe_dmic_ops,
228 }
229};
230
231/* DAI Controls */
232
233/* Values for 48kHz mode */
234static const char * const iir_mode_src[] = {
235 "SW custom", "5Hz", "10Hz", "25Hz", "50Hz", "65Hz"
236};
237
238static SOC_ENUM_SINGLE_DECL(iir_mode, AFE_DMIC0_UL_SRC_CON0, 7, iir_mode_src);
239
240static const struct snd_kcontrol_new mtk_dai_dmic_controls[] = {
241 SOC_SINGLE("DMIC IIR Switch", AFE_DMIC0_UL_SRC_CON0, DMIC_TOP_CON_IIR_ON, 1, 0),
242 SOC_ENUM("DMIC IIR Mode", iir_mode),
243};
244
245/* DAI widget */
246
247static const struct snd_soc_dapm_widget mtk_dai_dmic_widgets[] = {
248 SND_SOC_DAPM_INPUT("DMIC In"),
249};
250
251/* DAI route */
252
253static const struct snd_soc_dapm_route mtk_dai_dmic_routes[] = {
254 {"I14", NULL, "DMIC Capture"},
255 {"I15", NULL, "DMIC Capture"},
256 {"I16", NULL, "DMIC Capture"},
257 {"I17", NULL, "DMIC Capture"},
258 {"I18", NULL, "DMIC Capture"},
259 {"I19", NULL, "DMIC Capture"},
260 {"I20", NULL, "DMIC Capture"},
261 {"I21", NULL, "DMIC Capture"},
262 {"DMIC Capture", NULL, "DMIC In"},
263};
264
265static int init_dmic_priv_data(struct mtk_base_afe *afe)
266{
267 struct mt8365_afe_private *afe_priv = afe->platform_priv;
268 struct mt8365_dmic_data *dmic_priv;
269 struct device_node *np = afe->dev->of_node;
270 unsigned int temps[4];
271 int ret;
272
273 dmic_priv = devm_kzalloc(dev: afe->dev, size: sizeof(*dmic_priv), GFP_KERNEL);
274 if (!dmic_priv)
275 return -ENOMEM;
276
277 ret = of_property_read_u32_array(np, propname: "mediatek,dmic-mode",
278 out_values: &temps[0],
279 sz: 1);
280 if (ret == 0)
281 dmic_priv->two_wire_mode = !!temps[0];
282
283 if (!dmic_priv->two_wire_mode) {
284 dmic_priv->clk_phase_sel_ch1 = 0;
285 dmic_priv->clk_phase_sel_ch2 = 4;
286 }
287
288 afe_priv->dai_priv[MT8365_AFE_IO_DMIC] = dmic_priv;
289 return 0;
290}
291
292int mt8365_dai_dmic_register(struct mtk_base_afe *afe)
293{
294 struct mtk_base_afe_dai *dai;
295
296 dai = devm_kzalloc(dev: afe->dev, size: sizeof(*dai), GFP_KERNEL);
297 if (!dai)
298 return -ENOMEM;
299
300 list_add(new: &dai->list, head: &afe->sub_dais);
301 dai->dai_drivers = mtk_dai_dmic_driver;
302 dai->num_dai_drivers = ARRAY_SIZE(mtk_dai_dmic_driver);
303 dai->controls = mtk_dai_dmic_controls;
304 dai->num_controls = ARRAY_SIZE(mtk_dai_dmic_controls);
305 dai->dapm_widgets = mtk_dai_dmic_widgets;
306 dai->num_dapm_widgets = ARRAY_SIZE(mtk_dai_dmic_widgets);
307 dai->dapm_routes = mtk_dai_dmic_routes;
308 dai->num_dapm_routes = ARRAY_SIZE(mtk_dai_dmic_routes);
309 return init_dmic_priv_data(afe);
310}
311

source code of linux/sound/soc/mediatek/mt8365/mt8365-dai-dmic.c