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