1 // SPDX-License-Identifier: GPL-2.0
2 //
3 // MediaTek ALSA SoC Audio DAI HW Gain Control
4 //
5 // Copyright (c) 2022 MediaTek Inc.
6 // Author: Jiaxin Yu <jiaxin.yu@mediatek.com>
7 
8 #include <linux/regmap.h>
9 #include "mt8186-afe-common.h"
10 #include "mt8186-interconnection.h"
11 
12 #define HW_GAIN_1_EN_W_NAME "HW GAIN 1 Enable"
13 #define HW_GAIN_2_EN_W_NAME "HW GAIN 2 Enable"
14 
15 /* dai component */
16 static const struct snd_kcontrol_new mtk_hw_gain1_in_ch1_mix[] = {
17 	SOC_DAPM_SINGLE_AUTODISABLE("CONNSYS_I2S_CH1 Switch", AFE_CONN13_1,
18 				    I_CONNSYS_I2S_CH1, 1, 0),
19 };
20 
21 static const struct snd_kcontrol_new mtk_hw_gain1_in_ch2_mix[] = {
22 	SOC_DAPM_SINGLE_AUTODISABLE("CONNSYS_I2S_CH2 Switch", AFE_CONN14_1,
23 				    I_CONNSYS_I2S_CH2, 1, 0),
24 };
25 
26 static const struct snd_kcontrol_new mtk_hw_gain2_in_ch1_mix[] = {
27 	SOC_DAPM_SINGLE_AUTODISABLE("ADDA_UL_CH1 Switch", AFE_CONN15,
28 				    I_ADDA_UL_CH1, 1, 0),
29 };
30 
31 static const struct snd_kcontrol_new mtk_hw_gain2_in_ch2_mix[] = {
32 	SOC_DAPM_SINGLE_AUTODISABLE("ADDA_UL_CH2 Switch", AFE_CONN16,
33 				    I_ADDA_UL_CH2, 1, 0),
34 };
35 
36 static int mtk_hw_gain_event(struct snd_soc_dapm_widget *w,
37 			     struct snd_kcontrol *kcontrol,
38 			     int event)
39 {
40 	struct snd_soc_component *cmpnt = snd_soc_dapm_to_component(w->dapm);
41 	struct mtk_base_afe *afe = snd_soc_component_get_drvdata(cmpnt);
42 	unsigned int gain_cur;
43 	unsigned int gain_con1;
44 
45 	dev_dbg(cmpnt->dev, "%s(), name %s, event 0x%x\n",
46 		__func__, w->name, event);
47 
48 	switch (event) {
49 	case SND_SOC_DAPM_PRE_PMU:
50 		if (strcmp(w->name, HW_GAIN_1_EN_W_NAME) == 0) {
51 			gain_cur = AFE_GAIN1_CUR;
52 			gain_con1 = AFE_GAIN1_CON1;
53 		} else {
54 			gain_cur = AFE_GAIN2_CUR;
55 			gain_con1 = AFE_GAIN2_CON1;
56 		}
57 
58 		/* let hw gain ramp up, set cur gain to 0 */
59 		regmap_update_bits(afe->regmap, gain_cur, AFE_GAIN1_CUR_MASK_SFT, 0);
60 
61 		/* set target gain to 0 */
62 		regmap_update_bits(afe->regmap, gain_con1, GAIN1_TARGET_MASK_SFT, 0);
63 		break;
64 	default:
65 		break;
66 	}
67 
68 	return 0;
69 }
70 
71 static const struct snd_soc_dapm_widget mtk_dai_hw_gain_widgets[] = {
72 	/* inter-connections */
73 	SND_SOC_DAPM_MIXER("HW_GAIN1_IN_CH1", SND_SOC_NOPM, 0, 0,
74 			   mtk_hw_gain1_in_ch1_mix,
75 			   ARRAY_SIZE(mtk_hw_gain1_in_ch1_mix)),
76 	SND_SOC_DAPM_MIXER("HW_GAIN1_IN_CH2", SND_SOC_NOPM, 0, 0,
77 			   mtk_hw_gain1_in_ch2_mix,
78 			   ARRAY_SIZE(mtk_hw_gain1_in_ch2_mix)),
79 	SND_SOC_DAPM_MIXER("HW_GAIN2_IN_CH1", SND_SOC_NOPM, 0, 0,
80 			   mtk_hw_gain2_in_ch1_mix,
81 			   ARRAY_SIZE(mtk_hw_gain2_in_ch1_mix)),
82 	SND_SOC_DAPM_MIXER("HW_GAIN2_IN_CH2", SND_SOC_NOPM, 0, 0,
83 			   mtk_hw_gain2_in_ch2_mix,
84 			   ARRAY_SIZE(mtk_hw_gain2_in_ch2_mix)),
85 
86 	SND_SOC_DAPM_SUPPLY(HW_GAIN_1_EN_W_NAME,
87 			    AFE_GAIN1_CON0, GAIN1_ON_SFT, 0,
88 			    mtk_hw_gain_event,
89 			    SND_SOC_DAPM_PRE_PMU),
90 
91 	SND_SOC_DAPM_SUPPLY(HW_GAIN_2_EN_W_NAME,
92 			    AFE_GAIN2_CON0, GAIN2_ON_SFT, 0,
93 			    mtk_hw_gain_event,
94 			    SND_SOC_DAPM_PRE_PMU),
95 
96 	SND_SOC_DAPM_INPUT("HW Gain 1 Out Endpoint"),
97 	SND_SOC_DAPM_INPUT("HW Gain 2 Out Endpoint"),
98 	SND_SOC_DAPM_OUTPUT("HW Gain 1 In Endpoint"),
99 };
100 
101 static const struct snd_soc_dapm_route mtk_dai_hw_gain_routes[] = {
102 	{"HW Gain 1 In", NULL, "HW_GAIN1_IN_CH1"},
103 	{"HW Gain 1 In", NULL, "HW_GAIN1_IN_CH2"},
104 	{"HW Gain 2 In", NULL, "HW_GAIN2_IN_CH1"},
105 	{"HW Gain 2 In", NULL, "HW_GAIN2_IN_CH2"},
106 
107 	{"HW Gain 1 In", NULL, HW_GAIN_1_EN_W_NAME},
108 	{"HW Gain 1 Out", NULL, HW_GAIN_1_EN_W_NAME},
109 	{"HW Gain 2 In", NULL, HW_GAIN_2_EN_W_NAME},
110 	{"HW Gain 2 Out", NULL, HW_GAIN_2_EN_W_NAME},
111 
112 	{"HW Gain 1 In Endpoint", NULL, "HW Gain 1 In"},
113 	{"HW Gain 1 Out", NULL, "HW Gain 1 Out Endpoint"},
114 	{"HW Gain 2 Out", NULL, "HW Gain 2 Out Endpoint"},
115 };
116 
117 static const struct snd_kcontrol_new mtk_hw_gain_controls[] = {
118 	SOC_SINGLE("HW Gain 1 Volume", AFE_GAIN1_CON1,
119 		   GAIN1_TARGET_SFT, GAIN1_TARGET_MASK, 0),
120 	SOC_SINGLE("HW Gain 2 Volume", AFE_GAIN2_CON1,
121 		   GAIN2_TARGET_SFT, GAIN2_TARGET_MASK, 0),
122 };
123 
124 /* dai ops */
125 static int mtk_dai_gain_hw_params(struct snd_pcm_substream *substream,
126 				  struct snd_pcm_hw_params *params,
127 				  struct snd_soc_dai *dai)
128 {
129 	struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai);
130 	unsigned int rate = params_rate(params);
131 	unsigned int rate_reg = mt8186_rate_transform(afe->dev, rate, dai->id);
132 
133 	dev_dbg(afe->dev, "%s(), id %d, stream %d, rate %d\n",
134 		__func__, dai->id, substream->stream, rate);
135 
136 	/* rate */
137 	regmap_update_bits(afe->regmap,
138 			   dai->id == MT8186_DAI_HW_GAIN_1 ?
139 			   AFE_GAIN1_CON0 : AFE_GAIN2_CON0,
140 			   GAIN1_MODE_MASK_SFT,
141 			   rate_reg << GAIN1_MODE_SFT);
142 
143 	/* sample per step */
144 	regmap_update_bits(afe->regmap,
145 			   dai->id == MT8186_DAI_HW_GAIN_1 ?
146 			   AFE_GAIN1_CON0 : AFE_GAIN2_CON0,
147 			   GAIN1_SAMPLE_PER_STEP_MASK_SFT,
148 			   (dai->id == MT8186_DAI_HW_GAIN_1 ? 0x40 : 0x0) <<
149 			   GAIN1_SAMPLE_PER_STEP_SFT);
150 
151 	return 0;
152 }
153 
154 static const struct snd_soc_dai_ops mtk_dai_gain_ops = {
155 	.hw_params = mtk_dai_gain_hw_params,
156 };
157 
158 /* dai driver */
159 #define MTK_HW_GAIN_RATES (SNDRV_PCM_RATE_8000_48000 |\
160 			   SNDRV_PCM_RATE_88200 |\
161 			   SNDRV_PCM_RATE_96000 |\
162 			   SNDRV_PCM_RATE_176400 |\
163 			   SNDRV_PCM_RATE_192000)
164 
165 #define MTK_HW_GAIN_FORMATS (SNDRV_PCM_FMTBIT_S16_LE |\
166 			     SNDRV_PCM_FMTBIT_S24_LE |\
167 			     SNDRV_PCM_FMTBIT_S32_LE)
168 
169 static struct snd_soc_dai_driver mtk_dai_gain_driver[] = {
170 	{
171 		.name = "HW Gain 1",
172 		.id = MT8186_DAI_HW_GAIN_1,
173 		.playback = {
174 			.stream_name = "HW Gain 1 In",
175 			.channels_min = 1,
176 			.channels_max = 2,
177 			.rates = MTK_HW_GAIN_RATES,
178 			.formats = MTK_HW_GAIN_FORMATS,
179 		},
180 		.capture = {
181 			.stream_name = "HW Gain 1 Out",
182 			.channels_min = 1,
183 			.channels_max = 2,
184 			.rates = MTK_HW_GAIN_RATES,
185 			.formats = MTK_HW_GAIN_FORMATS,
186 		},
187 		.ops = &mtk_dai_gain_ops,
188 		.symmetric_rate = 1,
189 		.symmetric_channels = 1,
190 		.symmetric_sample_bits = 1,
191 	},
192 	{
193 		.name = "HW Gain 2",
194 		.id = MT8186_DAI_HW_GAIN_2,
195 		.playback = {
196 			.stream_name = "HW Gain 2 In",
197 			.channels_min = 1,
198 			.channels_max = 2,
199 			.rates = MTK_HW_GAIN_RATES,
200 			.formats = MTK_HW_GAIN_FORMATS,
201 		},
202 		.capture = {
203 			.stream_name = "HW Gain 2 Out",
204 			.channels_min = 1,
205 			.channels_max = 2,
206 			.rates = MTK_HW_GAIN_RATES,
207 			.formats = MTK_HW_GAIN_FORMATS,
208 		},
209 		.ops = &mtk_dai_gain_ops,
210 		.symmetric_rate = 1,
211 		.symmetric_channels = 1,
212 		.symmetric_sample_bits = 1,
213 	},
214 };
215 
216 int mt8186_dai_hw_gain_register(struct mtk_base_afe *afe)
217 {
218 	struct mtk_base_afe_dai *dai;
219 
220 	dai = devm_kzalloc(afe->dev, sizeof(*dai), GFP_KERNEL);
221 	if (!dai)
222 		return -ENOMEM;
223 
224 	list_add(&dai->list, &afe->sub_dais);
225 
226 	dai->dai_drivers = mtk_dai_gain_driver;
227 	dai->num_dai_drivers = ARRAY_SIZE(mtk_dai_gain_driver);
228 
229 	dai->controls = mtk_hw_gain_controls;
230 	dai->num_controls = ARRAY_SIZE(mtk_hw_gain_controls);
231 	dai->dapm_widgets = mtk_dai_hw_gain_widgets;
232 	dai->num_dapm_widgets = ARRAY_SIZE(mtk_dai_hw_gain_widgets);
233 	dai->dapm_routes = mtk_dai_hw_gain_routes;
234 	dai->num_dapm_routes = ARRAY_SIZE(mtk_dai_hw_gain_routes);
235 	return 0;
236 }
237