1 // SPDX-License-Identifier: GPL-2.0
2 //
3 // ROHM BD28623MUV class D speaker amplifier codec driver.
4 //
5 // Copyright (c) 2018 Socionext Inc.
6
7 #include <linux/delay.h>
8 #include <linux/gpio/consumer.h>
9 #include <linux/module.h>
10 #include <linux/of.h>
11 #include <linux/regulator/consumer.h>
12 #include <sound/pcm.h>
13 #include <sound/soc.h>
14
15 #define BD28623_NUM_SUPPLIES 3
16
17 static const char *const bd28623_supply_names[BD28623_NUM_SUPPLIES] = {
18 "VCCA",
19 "VCCP1",
20 "VCCP2",
21 };
22
23 struct bd28623_priv {
24 struct device *dev;
25 struct regulator_bulk_data supplies[BD28623_NUM_SUPPLIES];
26 struct gpio_desc *reset_gpio;
27 struct gpio_desc *mute_gpio;
28
29 int switch_spk;
30 };
31
32 static const struct snd_soc_dapm_widget bd28623_widgets[] = {
33 SND_SOC_DAPM_DAC("DAC", "Playback", SND_SOC_NOPM, 0, 0),
34 SND_SOC_DAPM_OUTPUT("OUT1P"),
35 SND_SOC_DAPM_OUTPUT("OUT1N"),
36 SND_SOC_DAPM_OUTPUT("OUT2P"),
37 SND_SOC_DAPM_OUTPUT("OUT2N"),
38 };
39
40 static const struct snd_soc_dapm_route bd28623_routes[] = {
41 { "OUT1P", NULL, "DAC" },
42 { "OUT1N", NULL, "DAC" },
43 { "OUT2P", NULL, "DAC" },
44 { "OUT2N", NULL, "DAC" },
45 };
46
47 static int bd28623_power_on(struct bd28623_priv *bd)
48 {
49 int ret;
50
51 ret = regulator_bulk_enable(ARRAY_SIZE(bd->supplies), bd->supplies);
52 if (ret) {
53 dev_err(bd->dev, "Failed to enable supplies: %d\n", ret);
54 return ret;
55 }
56
57 gpiod_set_value_cansleep(bd->reset_gpio, 0);
58 usleep_range(300000, 400000);
59
60 return 0;
61 }
62
63 static void bd28623_power_off(struct bd28623_priv *bd)
64 {
65 gpiod_set_value_cansleep(bd->reset_gpio, 1);
66
67 regulator_bulk_disable(ARRAY_SIZE(bd->supplies), bd->supplies);
68 }
69
70 static int bd28623_get_switch_spk(struct snd_kcontrol *kcontrol,
71 struct snd_ctl_elem_value *ucontrol)
72 {
73 struct snd_soc_component *component =
74 snd_soc_kcontrol_component(kcontrol);
75 struct bd28623_priv *bd = snd_soc_component_get_drvdata(component);
76
77 ucontrol->value.integer.value[0] = bd->switch_spk;
78
79 return 0;
80 }
81
82 static int bd28623_set_switch_spk(struct snd_kcontrol *kcontrol,
83 struct snd_ctl_elem_value *ucontrol)
84 {
85 struct snd_soc_component *component =
86 snd_soc_kcontrol_component(kcontrol);
87 struct bd28623_priv *bd = snd_soc_component_get_drvdata(component);
88
89 if (bd->switch_spk == ucontrol->value.integer.value[0])
90 return 0;
91
92 bd->switch_spk = ucontrol->value.integer.value[0];
93
94 gpiod_set_value_cansleep(bd->mute_gpio, bd->switch_spk ? 0 : 1);
95
96 return 0;
97 }
98
99 static const struct snd_kcontrol_new bd28623_controls[] = {
100 SOC_SINGLE_BOOL_EXT("Speaker Switch", 0,
101 bd28623_get_switch_spk, bd28623_set_switch_spk),
102 };
103
104 static int bd28623_codec_probe(struct snd_soc_component *component)
105 {
106 struct bd28623_priv *bd = snd_soc_component_get_drvdata(component);
107 int ret;
108
109 bd->switch_spk = 1;
110
111 ret = bd28623_power_on(bd);
112 if (ret)
113 return ret;
114
115 gpiod_set_value_cansleep(bd->mute_gpio, bd->switch_spk ? 0 : 1);
116
117 return 0;
118 }
119
120 static void bd28623_codec_remove(struct snd_soc_component *component)
121 {
122 struct bd28623_priv *bd = snd_soc_component_get_drvdata(component);
123
124 bd28623_power_off(bd);
125 }
126
127 static int bd28623_codec_suspend(struct snd_soc_component *component)
128 {
129 struct bd28623_priv *bd = snd_soc_component_get_drvdata(component);
130
131 bd28623_power_off(bd);
132
133 return 0;
134 }
135
136 static int bd28623_codec_resume(struct snd_soc_component *component)
137 {
138 struct bd28623_priv *bd = snd_soc_component_get_drvdata(component);
139 int ret;
140
141 ret = bd28623_power_on(bd);
142 if (ret)
143 return ret;
144
145 gpiod_set_value_cansleep(bd->mute_gpio, bd->switch_spk ? 0 : 1);
146
147 return 0;
148 }
149
150 static const struct snd_soc_component_driver soc_codec_bd = {
151 .probe = bd28623_codec_probe,
152 .remove = bd28623_codec_remove,
153 .suspend = bd28623_codec_suspend,
154 .resume = bd28623_codec_resume,
155 .dapm_widgets = bd28623_widgets,
156 .num_dapm_widgets = ARRAY_SIZE(bd28623_widgets),
157 .dapm_routes = bd28623_routes,
158 .num_dapm_routes = ARRAY_SIZE(bd28623_routes),
159 .controls = bd28623_controls,
160 .num_controls = ARRAY_SIZE(bd28623_controls),
161 .idle_bias_on = 1,
162 .use_pmdown_time = 1,
163 .endianness = 1,
164 };
165
166 static struct snd_soc_dai_driver soc_dai_bd = {
167 .name = "bd28623-speaker",
168 .playback = {
169 .stream_name = "Playback",
170 .formats = SNDRV_PCM_FMTBIT_S32_LE |
171 SNDRV_PCM_FMTBIT_S24_LE |
172 SNDRV_PCM_FMTBIT_S16_LE,
173 .rates = SNDRV_PCM_RATE_48000 |
174 SNDRV_PCM_RATE_44100 |
175 SNDRV_PCM_RATE_32000,
176 .channels_min = 2,
177 .channels_max = 2,
178 },
179 };
180
181 static int bd28623_probe(struct platform_device *pdev)
182 {
183 struct bd28623_priv *bd;
184 struct device *dev = &pdev->dev;
185 int i, ret;
186
187 bd = devm_kzalloc(&pdev->dev, sizeof(struct bd28623_priv), GFP_KERNEL);
188 if (!bd)
189 return -ENOMEM;
190
191 for (i = 0; i < ARRAY_SIZE(bd->supplies); i++)
192 bd->supplies[i].supply = bd28623_supply_names[i];
193
194 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(bd->supplies),
195 bd->supplies);
196 if (ret) {
197 dev_err(dev, "Failed to get supplies: %d\n", ret);
198 return ret;
199 }
200
201 bd->reset_gpio = devm_gpiod_get_optional(dev, "reset",
202 GPIOD_OUT_HIGH);
203 if (IS_ERR(bd->reset_gpio)) {
204 dev_err(dev, "Failed to request reset_gpio: %ld\n",
205 PTR_ERR(bd->reset_gpio));
206 return PTR_ERR(bd->reset_gpio);
207 }
208
209 bd->mute_gpio = devm_gpiod_get_optional(dev, "mute",
210 GPIOD_OUT_HIGH);
211 if (IS_ERR(bd->mute_gpio)) {
212 dev_err(dev, "Failed to request mute_gpio: %ld\n",
213 PTR_ERR(bd->mute_gpio));
214 return PTR_ERR(bd->mute_gpio);
215 }
216
217 platform_set_drvdata(pdev, bd);
218 bd->dev = dev;
219
220 return devm_snd_soc_register_component(dev, &soc_codec_bd,
221 &soc_dai_bd, 1);
222 }
223
224 static const struct of_device_id bd28623_of_match[] __maybe_unused = {
225 { .compatible = "rohm,bd28623", },
226 {}
227 };
228 MODULE_DEVICE_TABLE(of, bd28623_of_match);
229
230 static struct platform_driver bd28623_codec_driver = {
231 .driver = {
232 .name = "bd28623",
233 .of_match_table = of_match_ptr(bd28623_of_match),
234 },
235 .probe = bd28623_probe,
236 };
237 module_platform_driver(bd28623_codec_driver);
238
239 MODULE_AUTHOR("Katsuhiro Suzuki <suzuki.katsuhiro@socionext.com>");
240 MODULE_DESCRIPTION("ROHM BD28623 speaker amplifier driver");
241 MODULE_LICENSE("GPL v2");
242
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