1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * PCM1681 ASoC codec driver 4 * 5 * Copyright (c) StreamUnlimited GmbH 2013 6 * Marek Belisko <marek.belisko@streamunlimited.com> 7 */ 8 9 #include <linux/module.h> 10 #include <linux/slab.h> 11 #include <linux/delay.h> 12 #include <linux/gpio.h> 13 #include <linux/i2c.h> 14 #include <linux/regmap.h> 15 #include <linux/of.h> 16 #include <linux/of_device.h> 17 #include <linux/of_gpio.h> 18 #include <sound/pcm.h> 19 #include <sound/pcm_params.h> 20 #include <sound/soc.h> 21 #include <sound/tlv.h> 22 23 #define PCM1681_PCM_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \ 24 SNDRV_PCM_FMTBIT_S24_LE) 25 26 #define PCM1681_PCM_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 | \ 27 SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \ 28 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | \ 29 SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_192000) 30 31 #define PCM1681_SOFT_MUTE_ALL 0xff 32 #define PCM1681_DEEMPH_RATE_MASK 0x18 33 #define PCM1681_DEEMPH_MASK 0x01 34 35 #define PCM1681_ATT_CONTROL(X) (X <= 6 ? X : X + 9) /* Attenuation level */ 36 #define PCM1681_SOFT_MUTE 0x07 /* Soft mute control register */ 37 #define PCM1681_DAC_CONTROL 0x08 /* DAC operation control */ 38 #define PCM1681_FMT_CONTROL 0x09 /* Audio interface data format */ 39 #define PCM1681_DEEMPH_CONTROL 0x0a /* De-emphasis control */ 40 #define PCM1681_ZERO_DETECT_STATUS 0x0e /* Zero detect status reg */ 41 42 static const struct reg_default pcm1681_reg_defaults[] = { 43 { 0x01, 0xff }, 44 { 0x02, 0xff }, 45 { 0x03, 0xff }, 46 { 0x04, 0xff }, 47 { 0x05, 0xff }, 48 { 0x06, 0xff }, 49 { 0x07, 0x00 }, 50 { 0x08, 0x00 }, 51 { 0x09, 0x06 }, 52 { 0x0A, 0x00 }, 53 { 0x0B, 0xff }, 54 { 0x0C, 0x0f }, 55 { 0x0D, 0x00 }, 56 { 0x10, 0xff }, 57 { 0x11, 0xff }, 58 { 0x12, 0x00 }, 59 { 0x13, 0x00 }, 60 }; 61 62 static bool pcm1681_accessible_reg(struct device *dev, unsigned int reg) 63 { 64 return !((reg == 0x00) || (reg == 0x0f)); 65 } 66 67 static bool pcm1681_writeable_reg(struct device *dev, unsigned int reg) 68 { 69 return pcm1681_accessible_reg(dev, reg) && 70 (reg != PCM1681_ZERO_DETECT_STATUS); 71 } 72 73 struct pcm1681_private { 74 struct regmap *regmap; 75 unsigned int format; 76 /* Current deemphasis status */ 77 unsigned int deemph; 78 /* Current rate for deemphasis control */ 79 unsigned int rate; 80 }; 81 82 static const int pcm1681_deemph[] = { 44100, 48000, 32000 }; 83 84 static int pcm1681_set_deemph(struct snd_soc_component *component) 85 { 86 struct pcm1681_private *priv = snd_soc_component_get_drvdata(component); 87 int i = 0, val = -1, enable = 0; 88 89 if (priv->deemph) { 90 for (i = 0; i < ARRAY_SIZE(pcm1681_deemph); i++) { 91 if (pcm1681_deemph[i] == priv->rate) { 92 val = i; 93 break; 94 } 95 } 96 } 97 98 if (val != -1) { 99 regmap_update_bits(priv->regmap, PCM1681_DEEMPH_CONTROL, 100 PCM1681_DEEMPH_RATE_MASK, val << 3); 101 enable = 1; 102 } else { 103 enable = 0; 104 } 105 106 /* enable/disable deemphasis functionality */ 107 return regmap_update_bits(priv->regmap, PCM1681_DEEMPH_CONTROL, 108 PCM1681_DEEMPH_MASK, enable); 109 } 110 111 static int pcm1681_get_deemph(struct snd_kcontrol *kcontrol, 112 struct snd_ctl_elem_value *ucontrol) 113 { 114 struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol); 115 struct pcm1681_private *priv = snd_soc_component_get_drvdata(component); 116 117 ucontrol->value.integer.value[0] = priv->deemph; 118 119 return 0; 120 } 121 122 static int pcm1681_put_deemph(struct snd_kcontrol *kcontrol, 123 struct snd_ctl_elem_value *ucontrol) 124 { 125 struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol); 126 struct pcm1681_private *priv = snd_soc_component_get_drvdata(component); 127 128 priv->deemph = ucontrol->value.integer.value[0]; 129 130 return pcm1681_set_deemph(component); 131 } 132 133 static int pcm1681_set_dai_fmt(struct snd_soc_dai *codec_dai, 134 unsigned int format) 135 { 136 struct snd_soc_component *component = codec_dai->component; 137 struct pcm1681_private *priv = snd_soc_component_get_drvdata(component); 138 139 /* The PCM1681 can only be slave to all clocks */ 140 if ((format & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS) { 141 dev_err(component->dev, "Invalid clocking mode\n"); 142 return -EINVAL; 143 } 144 145 priv->format = format; 146 147 return 0; 148 } 149 150 static int pcm1681_mute(struct snd_soc_dai *dai, int mute, int direction) 151 { 152 struct snd_soc_component *component = dai->component; 153 struct pcm1681_private *priv = snd_soc_component_get_drvdata(component); 154 int val; 155 156 if (mute) 157 val = PCM1681_SOFT_MUTE_ALL; 158 else 159 val = 0; 160 161 return regmap_write(priv->regmap, PCM1681_SOFT_MUTE, val); 162 } 163 164 static int pcm1681_hw_params(struct snd_pcm_substream *substream, 165 struct snd_pcm_hw_params *params, 166 struct snd_soc_dai *dai) 167 { 168 struct snd_soc_component *component = dai->component; 169 struct pcm1681_private *priv = snd_soc_component_get_drvdata(component); 170 int val = 0, ret; 171 172 priv->rate = params_rate(params); 173 174 switch (priv->format & SND_SOC_DAIFMT_FORMAT_MASK) { 175 case SND_SOC_DAIFMT_RIGHT_J: 176 switch (params_width(params)) { 177 case 24: 178 val = 0; 179 break; 180 case 16: 181 val = 3; 182 break; 183 default: 184 return -EINVAL; 185 } 186 break; 187 case SND_SOC_DAIFMT_I2S: 188 val = 0x04; 189 break; 190 case SND_SOC_DAIFMT_LEFT_J: 191 val = 0x05; 192 break; 193 default: 194 dev_err(component->dev, "Invalid DAI format\n"); 195 return -EINVAL; 196 } 197 198 ret = regmap_update_bits(priv->regmap, PCM1681_FMT_CONTROL, 0x0f, val); 199 if (ret < 0) 200 return ret; 201 202 return pcm1681_set_deemph(component); 203 } 204 205 static const struct snd_soc_dai_ops pcm1681_dai_ops = { 206 .set_fmt = pcm1681_set_dai_fmt, 207 .hw_params = pcm1681_hw_params, 208 .mute_stream = pcm1681_mute, 209 .no_capture_mute = 1, 210 }; 211 212 static const struct snd_soc_dapm_widget pcm1681_dapm_widgets[] = { 213 SND_SOC_DAPM_OUTPUT("VOUT1"), 214 SND_SOC_DAPM_OUTPUT("VOUT2"), 215 SND_SOC_DAPM_OUTPUT("VOUT3"), 216 SND_SOC_DAPM_OUTPUT("VOUT4"), 217 SND_SOC_DAPM_OUTPUT("VOUT5"), 218 SND_SOC_DAPM_OUTPUT("VOUT6"), 219 SND_SOC_DAPM_OUTPUT("VOUT7"), 220 SND_SOC_DAPM_OUTPUT("VOUT8"), 221 }; 222 223 static const struct snd_soc_dapm_route pcm1681_dapm_routes[] = { 224 { "VOUT1", NULL, "Playback" }, 225 { "VOUT2", NULL, "Playback" }, 226 { "VOUT3", NULL, "Playback" }, 227 { "VOUT4", NULL, "Playback" }, 228 { "VOUT5", NULL, "Playback" }, 229 { "VOUT6", NULL, "Playback" }, 230 { "VOUT7", NULL, "Playback" }, 231 { "VOUT8", NULL, "Playback" }, 232 }; 233 234 static const DECLARE_TLV_DB_SCALE(pcm1681_dac_tlv, -6350, 50, 1); 235 236 static const struct snd_kcontrol_new pcm1681_controls[] = { 237 SOC_DOUBLE_R_TLV("Channel 1/2 Playback Volume", 238 PCM1681_ATT_CONTROL(1), PCM1681_ATT_CONTROL(2), 0, 239 0x7f, 0, pcm1681_dac_tlv), 240 SOC_DOUBLE_R_TLV("Channel 3/4 Playback Volume", 241 PCM1681_ATT_CONTROL(3), PCM1681_ATT_CONTROL(4), 0, 242 0x7f, 0, pcm1681_dac_tlv), 243 SOC_DOUBLE_R_TLV("Channel 5/6 Playback Volume", 244 PCM1681_ATT_CONTROL(5), PCM1681_ATT_CONTROL(6), 0, 245 0x7f, 0, pcm1681_dac_tlv), 246 SOC_DOUBLE_R_TLV("Channel 7/8 Playback Volume", 247 PCM1681_ATT_CONTROL(7), PCM1681_ATT_CONTROL(8), 0, 248 0x7f, 0, pcm1681_dac_tlv), 249 SOC_SINGLE_BOOL_EXT("De-emphasis Switch", 0, 250 pcm1681_get_deemph, pcm1681_put_deemph), 251 }; 252 253 static struct snd_soc_dai_driver pcm1681_dai = { 254 .name = "pcm1681-hifi", 255 .playback = { 256 .stream_name = "Playback", 257 .channels_min = 2, 258 .channels_max = 8, 259 .rates = PCM1681_PCM_RATES, 260 .formats = PCM1681_PCM_FORMATS, 261 }, 262 .ops = &pcm1681_dai_ops, 263 }; 264 265 #ifdef CONFIG_OF 266 static const struct of_device_id pcm1681_dt_ids[] = { 267 { .compatible = "ti,pcm1681", }, 268 { } 269 }; 270 MODULE_DEVICE_TABLE(of, pcm1681_dt_ids); 271 #endif 272 273 static const struct regmap_config pcm1681_regmap = { 274 .reg_bits = 8, 275 .val_bits = 8, 276 .max_register = 0x13, 277 .reg_defaults = pcm1681_reg_defaults, 278 .num_reg_defaults = ARRAY_SIZE(pcm1681_reg_defaults), 279 .writeable_reg = pcm1681_writeable_reg, 280 .readable_reg = pcm1681_accessible_reg, 281 }; 282 283 static const struct snd_soc_component_driver soc_component_dev_pcm1681 = { 284 .controls = pcm1681_controls, 285 .num_controls = ARRAY_SIZE(pcm1681_controls), 286 .dapm_widgets = pcm1681_dapm_widgets, 287 .num_dapm_widgets = ARRAY_SIZE(pcm1681_dapm_widgets), 288 .dapm_routes = pcm1681_dapm_routes, 289 .num_dapm_routes = ARRAY_SIZE(pcm1681_dapm_routes), 290 .idle_bias_on = 1, 291 .use_pmdown_time = 1, 292 .endianness = 1, 293 .non_legacy_dai_naming = 1, 294 }; 295 296 static const struct i2c_device_id pcm1681_i2c_id[] = { 297 {"pcm1681", 0}, 298 {} 299 }; 300 MODULE_DEVICE_TABLE(i2c, pcm1681_i2c_id); 301 302 static int pcm1681_i2c_probe(struct i2c_client *client, 303 const struct i2c_device_id *id) 304 { 305 int ret; 306 struct pcm1681_private *priv; 307 308 priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL); 309 if (!priv) 310 return -ENOMEM; 311 312 priv->regmap = devm_regmap_init_i2c(client, &pcm1681_regmap); 313 if (IS_ERR(priv->regmap)) { 314 ret = PTR_ERR(priv->regmap); 315 dev_err(&client->dev, "Failed to create regmap: %d\n", ret); 316 return ret; 317 } 318 319 i2c_set_clientdata(client, priv); 320 321 return devm_snd_soc_register_component(&client->dev, 322 &soc_component_dev_pcm1681, 323 &pcm1681_dai, 1); 324 } 325 326 static struct i2c_driver pcm1681_i2c_driver = { 327 .driver = { 328 .name = "pcm1681", 329 .of_match_table = of_match_ptr(pcm1681_dt_ids), 330 }, 331 .id_table = pcm1681_i2c_id, 332 .probe = pcm1681_i2c_probe, 333 }; 334 335 module_i2c_driver(pcm1681_i2c_driver); 336 337 MODULE_DESCRIPTION("Texas Instruments PCM1681 ALSA SoC Codec Driver"); 338 MODULE_AUTHOR("Marek Belisko <marek.belisko@streamunlimited.com>"); 339 MODULE_LICENSE("GPL"); 340