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 = snd_kcontrol_chip(kcontrol); 74 struct bd28623_priv *bd = snd_soc_component_get_drvdata(component); 75 76 ucontrol->value.integer.value[0] = bd->switch_spk; 77 78 return 0; 79 } 80 81 static int bd28623_set_switch_spk(struct snd_kcontrol *kcontrol, 82 struct snd_ctl_elem_value *ucontrol) 83 { 84 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol); 85 struct bd28623_priv *bd = snd_soc_component_get_drvdata(component); 86 87 if (bd->switch_spk == ucontrol->value.integer.value[0]) 88 return 0; 89 90 bd->switch_spk = ucontrol->value.integer.value[0]; 91 92 gpiod_set_value_cansleep(bd->mute_gpio, bd->switch_spk ? 0 : 1); 93 94 return 0; 95 } 96 97 static const struct snd_kcontrol_new bd28623_controls[] = { 98 SOC_SINGLE_BOOL_EXT("Speaker Switch", 0, 99 bd28623_get_switch_spk, bd28623_set_switch_spk), 100 }; 101 102 static int bd28623_codec_probe(struct snd_soc_component *component) 103 { 104 struct bd28623_priv *bd = snd_soc_component_get_drvdata(component); 105 int ret; 106 107 bd->switch_spk = 1; 108 109 ret = bd28623_power_on(bd); 110 if (ret) 111 return ret; 112 113 gpiod_set_value_cansleep(bd->mute_gpio, bd->switch_spk ? 0 : 1); 114 115 return 0; 116 } 117 118 static void bd28623_codec_remove(struct snd_soc_component *component) 119 { 120 struct bd28623_priv *bd = snd_soc_component_get_drvdata(component); 121 122 bd28623_power_off(bd); 123 } 124 125 static int bd28623_codec_suspend(struct snd_soc_component *component) 126 { 127 struct bd28623_priv *bd = snd_soc_component_get_drvdata(component); 128 129 bd28623_power_off(bd); 130 131 return 0; 132 } 133 134 static int bd28623_codec_resume(struct snd_soc_component *component) 135 { 136 struct bd28623_priv *bd = snd_soc_component_get_drvdata(component); 137 int ret; 138 139 ret = bd28623_power_on(bd); 140 if (ret) 141 return ret; 142 143 gpiod_set_value_cansleep(bd->mute_gpio, bd->switch_spk ? 0 : 1); 144 145 return 0; 146 } 147 148 static const struct snd_soc_component_driver soc_codec_bd = { 149 .probe = bd28623_codec_probe, 150 .remove = bd28623_codec_remove, 151 .suspend = bd28623_codec_suspend, 152 .resume = bd28623_codec_resume, 153 .dapm_widgets = bd28623_widgets, 154 .num_dapm_widgets = ARRAY_SIZE(bd28623_widgets), 155 .dapm_routes = bd28623_routes, 156 .num_dapm_routes = ARRAY_SIZE(bd28623_routes), 157 .controls = bd28623_controls, 158 .num_controls = ARRAY_SIZE(bd28623_controls), 159 .idle_bias_on = 1, 160 .use_pmdown_time = 1, 161 .endianness = 1, 162 }; 163 164 static struct snd_soc_dai_driver soc_dai_bd = { 165 .name = "bd28623-speaker", 166 .playback = { 167 .stream_name = "Playback", 168 .formats = SNDRV_PCM_FMTBIT_S32_LE | 169 SNDRV_PCM_FMTBIT_S24_LE | 170 SNDRV_PCM_FMTBIT_S16_LE, 171 .rates = SNDRV_PCM_RATE_48000 | 172 SNDRV_PCM_RATE_44100 | 173 SNDRV_PCM_RATE_32000, 174 .channels_min = 2, 175 .channels_max = 2, 176 }, 177 }; 178 179 static int bd28623_probe(struct platform_device *pdev) 180 { 181 struct bd28623_priv *bd; 182 struct device *dev = &pdev->dev; 183 int i, ret; 184 185 bd = devm_kzalloc(&pdev->dev, sizeof(struct bd28623_priv), GFP_KERNEL); 186 if (!bd) 187 return -ENOMEM; 188 189 for (i = 0; i < ARRAY_SIZE(bd->supplies); i++) 190 bd->supplies[i].supply = bd28623_supply_names[i]; 191 192 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(bd->supplies), 193 bd->supplies); 194 if (ret) { 195 dev_err(dev, "Failed to get supplies: %d\n", ret); 196 return ret; 197 } 198 199 bd->reset_gpio = devm_gpiod_get_optional(dev, "reset", 200 GPIOD_OUT_HIGH); 201 if (IS_ERR(bd->reset_gpio)) { 202 dev_err(dev, "Failed to request reset_gpio: %ld\n", 203 PTR_ERR(bd->reset_gpio)); 204 return PTR_ERR(bd->reset_gpio); 205 } 206 207 bd->mute_gpio = devm_gpiod_get_optional(dev, "mute", 208 GPIOD_OUT_HIGH); 209 if (IS_ERR(bd->mute_gpio)) { 210 dev_err(dev, "Failed to request mute_gpio: %ld\n", 211 PTR_ERR(bd->mute_gpio)); 212 return PTR_ERR(bd->mute_gpio); 213 } 214 215 platform_set_drvdata(pdev, bd); 216 bd->dev = dev; 217 218 return devm_snd_soc_register_component(dev, &soc_codec_bd, 219 &soc_dai_bd, 1); 220 } 221 222 static const struct of_device_id bd28623_of_match[] __maybe_unused = { 223 { .compatible = "rohm,bd28623", }, 224 {} 225 }; 226 MODULE_DEVICE_TABLE(of, bd28623_of_match); 227 228 static struct platform_driver bd28623_codec_driver = { 229 .driver = { 230 .name = "bd28623", 231 .of_match_table = of_match_ptr(bd28623_of_match), 232 }, 233 .probe = bd28623_probe, 234 }; 235 module_platform_driver(bd28623_codec_driver); 236 237 MODULE_AUTHOR("Katsuhiro Suzuki <suzuki.katsuhiro@socionext.com>"); 238 MODULE_DESCRIPTION("ROHM BD28623 speaker amplifier driver"); 239 MODULE_LICENSE("GPL v2"); 240