1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * ak4118.c -- Asahi Kasei ALSA Soc Audio driver 4 * 5 * Copyright 2018 DEVIALET 6 */ 7 8 #include <linux/i2c.h> 9 #include <linux/gpio/consumer.h> 10 #include <linux/module.h> 11 #include <linux/of_device.h> 12 #include <linux/of_gpio.h> 13 #include <linux/regmap.h> 14 #include <linux/slab.h> 15 16 #include <sound/asoundef.h> 17 #include <sound/core.h> 18 #include <sound/initval.h> 19 #include <sound/soc.h> 20 21 #define AK4118_REG_CLK_PWR_CTL 0x00 22 #define AK4118_REG_FORMAT_CTL 0x01 23 #define AK4118_REG_IO_CTL0 0x02 24 #define AK4118_REG_IO_CTL1 0x03 25 #define AK4118_REG_INT0_MASK 0x04 26 #define AK4118_REG_INT1_MASK 0x05 27 #define AK4118_REG_RCV_STATUS0 0x06 28 #define AK4118_REG_RCV_STATUS1 0x07 29 #define AK4118_REG_RXCHAN_STATUS0 0x08 30 #define AK4118_REG_RXCHAN_STATUS1 0x09 31 #define AK4118_REG_RXCHAN_STATUS2 0x0a 32 #define AK4118_REG_RXCHAN_STATUS3 0x0b 33 #define AK4118_REG_RXCHAN_STATUS4 0x0c 34 #define AK4118_REG_TXCHAN_STATUS0 0x0d 35 #define AK4118_REG_TXCHAN_STATUS1 0x0e 36 #define AK4118_REG_TXCHAN_STATUS2 0x0f 37 #define AK4118_REG_TXCHAN_STATUS3 0x10 38 #define AK4118_REG_TXCHAN_STATUS4 0x11 39 #define AK4118_REG_BURST_PREAMB_PC0 0x12 40 #define AK4118_REG_BURST_PREAMB_PC1 0x13 41 #define AK4118_REG_BURST_PREAMB_PD0 0x14 42 #define AK4118_REG_BURST_PREAMB_PD1 0x15 43 #define AK4118_REG_QSUB_CTL 0x16 44 #define AK4118_REG_QSUB_TRACK 0x17 45 #define AK4118_REG_QSUB_INDEX 0x18 46 #define AK4118_REG_QSUB_MIN 0x19 47 #define AK4118_REG_QSUB_SEC 0x1a 48 #define AK4118_REG_QSUB_FRAME 0x1b 49 #define AK4118_REG_QSUB_ZERO 0x1c 50 #define AK4118_REG_QSUB_ABS_MIN 0x1d 51 #define AK4118_REG_QSUB_ABS_SEC 0x1e 52 #define AK4118_REG_QSUB_ABS_FRAME 0x1f 53 #define AK4118_REG_GPE 0x20 54 #define AK4118_REG_GPDR 0x21 55 #define AK4118_REG_GPSCR 0x22 56 #define AK4118_REG_GPLR 0x23 57 #define AK4118_REG_DAT_MASK_DTS 0x24 58 #define AK4118_REG_RX_DETECT 0x25 59 #define AK4118_REG_STC_DAT_DETECT 0x26 60 #define AK4118_REG_RXCHAN_STATUS5 0x27 61 #define AK4118_REG_TXCHAN_STATUS5 0x28 62 #define AK4118_REG_MAX 0x29 63 64 #define AK4118_REG_FORMAT_CTL_DIF0 (1 << 4) 65 #define AK4118_REG_FORMAT_CTL_DIF1 (1 << 5) 66 #define AK4118_REG_FORMAT_CTL_DIF2 (1 << 6) 67 68 struct ak4118_priv { 69 struct regmap *regmap; 70 struct gpio_desc *reset; 71 struct gpio_desc *irq; 72 struct snd_soc_component *component; 73 }; 74 75 static const struct reg_default ak4118_reg_defaults[] = { 76 {AK4118_REG_CLK_PWR_CTL, 0x43}, 77 {AK4118_REG_FORMAT_CTL, 0x6a}, 78 {AK4118_REG_IO_CTL0, 0x88}, 79 {AK4118_REG_IO_CTL1, 0x48}, 80 {AK4118_REG_INT0_MASK, 0xee}, 81 {AK4118_REG_INT1_MASK, 0xb5}, 82 {AK4118_REG_RCV_STATUS0, 0x00}, 83 {AK4118_REG_RCV_STATUS1, 0x10}, 84 {AK4118_REG_TXCHAN_STATUS0, 0x00}, 85 {AK4118_REG_TXCHAN_STATUS1, 0x00}, 86 {AK4118_REG_TXCHAN_STATUS2, 0x00}, 87 {AK4118_REG_TXCHAN_STATUS3, 0x00}, 88 {AK4118_REG_TXCHAN_STATUS4, 0x00}, 89 {AK4118_REG_GPE, 0x77}, 90 {AK4118_REG_GPDR, 0x00}, 91 {AK4118_REG_GPSCR, 0x00}, 92 {AK4118_REG_GPLR, 0x00}, 93 {AK4118_REG_DAT_MASK_DTS, 0x3f}, 94 {AK4118_REG_RX_DETECT, 0x00}, 95 {AK4118_REG_STC_DAT_DETECT, 0x00}, 96 {AK4118_REG_TXCHAN_STATUS5, 0x00}, 97 }; 98 99 static const char * const ak4118_input_select_txt[] = { 100 "RX0", "RX1", "RX2", "RX3", "RX4", "RX5", "RX6", "RX7", 101 }; 102 static SOC_ENUM_SINGLE_DECL(ak4118_insel_enum, AK4118_REG_IO_CTL1, 0x0, 103 ak4118_input_select_txt); 104 105 static const struct snd_kcontrol_new ak4118_input_mux_controls = 106 SOC_DAPM_ENUM("Input Select", ak4118_insel_enum); 107 108 static const char * const ak4118_iec958_fs_txt[] = { 109 "44100", "48000", "32000", "22050", "11025", "24000", "16000", "88200", 110 "8000", "96000", "64000", "176400", "192000", 111 }; 112 113 static const int ak4118_iec958_fs_val[] = { 114 0x0, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8, 0x9, 0xA, 0xB, 0xC, 0xE, 115 }; 116 117 static SOC_VALUE_ENUM_SINGLE_DECL(ak4118_iec958_fs_enum, AK4118_REG_RCV_STATUS1, 118 0x4, 0x4, ak4118_iec958_fs_txt, 119 ak4118_iec958_fs_val); 120 121 static struct snd_kcontrol_new ak4118_iec958_controls[] = { 122 SOC_SINGLE("IEC958 Parity Errors", AK4118_REG_RCV_STATUS0, 0, 1, 0), 123 SOC_SINGLE("IEC958 No Audio", AK4118_REG_RCV_STATUS0, 1, 1, 0), 124 SOC_SINGLE("IEC958 PLL Lock", AK4118_REG_RCV_STATUS0, 4, 1, 1), 125 SOC_SINGLE("IEC958 Non PCM", AK4118_REG_RCV_STATUS0, 6, 1, 0), 126 SOC_ENUM("IEC958 Sampling Freq", ak4118_iec958_fs_enum), 127 }; 128 129 static const struct snd_soc_dapm_widget ak4118_dapm_widgets[] = { 130 SND_SOC_DAPM_INPUT("INRX0"), 131 SND_SOC_DAPM_INPUT("INRX1"), 132 SND_SOC_DAPM_INPUT("INRX2"), 133 SND_SOC_DAPM_INPUT("INRX3"), 134 SND_SOC_DAPM_INPUT("INRX4"), 135 SND_SOC_DAPM_INPUT("INRX5"), 136 SND_SOC_DAPM_INPUT("INRX6"), 137 SND_SOC_DAPM_INPUT("INRX7"), 138 SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, 139 &ak4118_input_mux_controls), 140 }; 141 142 static const struct snd_soc_dapm_route ak4118_dapm_routes[] = { 143 {"Input Mux", "RX0", "INRX0"}, 144 {"Input Mux", "RX1", "INRX1"}, 145 {"Input Mux", "RX2", "INRX2"}, 146 {"Input Mux", "RX3", "INRX3"}, 147 {"Input Mux", "RX4", "INRX4"}, 148 {"Input Mux", "RX5", "INRX5"}, 149 {"Input Mux", "RX6", "INRX6"}, 150 {"Input Mux", "RX7", "INRX7"}, 151 }; 152 153 154 static int ak4118_set_dai_fmt_master(struct ak4118_priv *ak4118, 155 unsigned int format) 156 { 157 int dif; 158 159 switch (format & SND_SOC_DAIFMT_FORMAT_MASK) { 160 case SND_SOC_DAIFMT_I2S: 161 dif = AK4118_REG_FORMAT_CTL_DIF0 | AK4118_REG_FORMAT_CTL_DIF2; 162 break; 163 case SND_SOC_DAIFMT_RIGHT_J: 164 dif = AK4118_REG_FORMAT_CTL_DIF0 | AK4118_REG_FORMAT_CTL_DIF1; 165 break; 166 case SND_SOC_DAIFMT_LEFT_J: 167 dif = AK4118_REG_FORMAT_CTL_DIF2; 168 break; 169 default: 170 return -ENOTSUPP; 171 } 172 173 return dif; 174 } 175 176 static int ak4118_set_dai_fmt_slave(struct ak4118_priv *ak4118, 177 unsigned int format) 178 { 179 int dif; 180 181 switch (format & SND_SOC_DAIFMT_FORMAT_MASK) { 182 case SND_SOC_DAIFMT_I2S: 183 dif = AK4118_REG_FORMAT_CTL_DIF0 | AK4118_REG_FORMAT_CTL_DIF1 | 184 AK4118_REG_FORMAT_CTL_DIF2; 185 break; 186 case SND_SOC_DAIFMT_LEFT_J: 187 dif = AK4118_REG_FORMAT_CTL_DIF1 | AK4118_REG_FORMAT_CTL_DIF2; 188 break; 189 default: 190 return -ENOTSUPP; 191 } 192 193 return dif; 194 } 195 196 static int ak4118_set_dai_fmt(struct snd_soc_dai *dai, 197 unsigned int format) 198 { 199 struct snd_soc_component *component = dai->component; 200 struct ak4118_priv *ak4118 = snd_soc_component_get_drvdata(component); 201 int dif; 202 int ret = 0; 203 204 switch (format & SND_SOC_DAIFMT_MASTER_MASK) { 205 case SND_SOC_DAIFMT_CBM_CFM: 206 /* component is master */ 207 dif = ak4118_set_dai_fmt_master(ak4118, format); 208 break; 209 case SND_SOC_DAIFMT_CBS_CFS: 210 /*component is slave */ 211 dif = ak4118_set_dai_fmt_slave(ak4118, format); 212 break; 213 default: 214 ret = -ENOTSUPP; 215 goto exit; 216 } 217 218 /* format not supported */ 219 if (dif < 0) { 220 ret = dif; 221 goto exit; 222 } 223 224 ret = regmap_update_bits(ak4118->regmap, AK4118_REG_FORMAT_CTL, 225 AK4118_REG_FORMAT_CTL_DIF0 | 226 AK4118_REG_FORMAT_CTL_DIF1 | 227 AK4118_REG_FORMAT_CTL_DIF2, dif); 228 if (ret < 0) 229 goto exit; 230 231 exit: 232 return ret; 233 } 234 235 static int ak4118_hw_params(struct snd_pcm_substream *substream, 236 struct snd_pcm_hw_params *params, 237 struct snd_soc_dai *dai) 238 { 239 return 0; 240 } 241 242 static const struct snd_soc_dai_ops ak4118_dai_ops = { 243 .hw_params = ak4118_hw_params, 244 .set_fmt = ak4118_set_dai_fmt, 245 }; 246 247 static struct snd_soc_dai_driver ak4118_dai = { 248 .name = "ak4118-hifi", 249 .capture = { 250 .stream_name = "Capture", 251 .channels_min = 2, 252 .channels_max = 2, 253 .rates = SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 | 254 SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 | 255 SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 | 256 SNDRV_PCM_RATE_176400 | SNDRV_PCM_RATE_192000, 257 .formats = SNDRV_PCM_FMTBIT_S16_LE | 258 SNDRV_PCM_FMTBIT_S24_3LE | 259 SNDRV_PCM_FMTBIT_S24_LE 260 }, 261 .ops = &ak4118_dai_ops, 262 }; 263 264 static irqreturn_t ak4118_irq_handler(int irq, void *data) 265 { 266 struct ak4118_priv *ak4118 = data; 267 struct snd_soc_component *component = ak4118->component; 268 struct snd_kcontrol_new *kctl_new; 269 struct snd_kcontrol *kctl; 270 struct snd_ctl_elem_id *id; 271 unsigned int i; 272 273 if (!component) 274 return IRQ_NONE; 275 276 for (i = 0; i < ARRAY_SIZE(ak4118_iec958_controls); i++) { 277 kctl_new = &ak4118_iec958_controls[i]; 278 kctl = snd_soc_card_get_kcontrol(component->card, 279 kctl_new->name); 280 if (!kctl) 281 continue; 282 id = &kctl->id; 283 snd_ctl_notify(component->card->snd_card, 284 SNDRV_CTL_EVENT_MASK_VALUE, id); 285 } 286 287 return IRQ_HANDLED; 288 } 289 290 static int ak4118_probe(struct snd_soc_component *component) 291 { 292 struct ak4118_priv *ak4118 = snd_soc_component_get_drvdata(component); 293 int ret = 0; 294 295 ak4118->component = component; 296 297 /* release reset */ 298 gpiod_set_value(ak4118->reset, 0); 299 300 /* unmask all int1 sources */ 301 ret = regmap_write(ak4118->regmap, AK4118_REG_INT1_MASK, 0x00); 302 if (ret < 0) { 303 dev_err(component->dev, 304 "failed to write regmap 0x%x 0x%x: %d\n", 305 AK4118_REG_INT1_MASK, 0x00, ret); 306 return ret; 307 } 308 309 /* rx detect enable on all channels */ 310 ret = regmap_write(ak4118->regmap, AK4118_REG_RX_DETECT, 0xff); 311 if (ret < 0) { 312 dev_err(component->dev, 313 "failed to write regmap 0x%x 0x%x: %d\n", 314 AK4118_REG_RX_DETECT, 0xff, ret); 315 return ret; 316 } 317 318 ret = snd_soc_add_component_controls(component, ak4118_iec958_controls, 319 ARRAY_SIZE(ak4118_iec958_controls)); 320 if (ret) { 321 dev_err(component->dev, 322 "failed to add component kcontrols: %d\n", ret); 323 return ret; 324 } 325 326 return 0; 327 } 328 329 static void ak4118_remove(struct snd_soc_component *component) 330 { 331 struct ak4118_priv *ak4118 = snd_soc_component_get_drvdata(component); 332 333 /* hold reset */ 334 gpiod_set_value(ak4118->reset, 1); 335 } 336 337 static const struct snd_soc_component_driver soc_component_drv_ak4118 = { 338 .probe = ak4118_probe, 339 .remove = ak4118_remove, 340 .dapm_widgets = ak4118_dapm_widgets, 341 .num_dapm_widgets = ARRAY_SIZE(ak4118_dapm_widgets), 342 .dapm_routes = ak4118_dapm_routes, 343 .num_dapm_routes = ARRAY_SIZE(ak4118_dapm_routes), 344 .idle_bias_on = 1, 345 .use_pmdown_time = 1, 346 .endianness = 1, 347 .non_legacy_dai_naming = 1, 348 }; 349 350 static const struct regmap_config ak4118_regmap = { 351 .reg_bits = 8, 352 .val_bits = 8, 353 354 .reg_defaults = ak4118_reg_defaults, 355 .num_reg_defaults = ARRAY_SIZE(ak4118_reg_defaults), 356 357 .cache_type = REGCACHE_NONE, 358 .max_register = AK4118_REG_MAX - 1, 359 }; 360 361 static int ak4118_i2c_probe(struct i2c_client *i2c, 362 const struct i2c_device_id *id) 363 { 364 struct ak4118_priv *ak4118; 365 int ret; 366 367 ak4118 = devm_kzalloc(&i2c->dev, sizeof(struct ak4118_priv), 368 GFP_KERNEL); 369 if (ak4118 == NULL) 370 return -ENOMEM; 371 372 ak4118->regmap = devm_regmap_init_i2c(i2c, &ak4118_regmap); 373 if (IS_ERR(ak4118->regmap)) 374 return PTR_ERR(ak4118->regmap); 375 376 i2c_set_clientdata(i2c, ak4118); 377 378 ak4118->reset = devm_gpiod_get(&i2c->dev, "reset", GPIOD_OUT_HIGH); 379 if (IS_ERR(ak4118->reset)) { 380 ret = PTR_ERR(ak4118->reset); 381 if (ret != -EPROBE_DEFER) 382 dev_err(&i2c->dev, "Failed to get reset: %d\n", ret); 383 return ret; 384 } 385 386 ak4118->irq = devm_gpiod_get(&i2c->dev, "irq", GPIOD_IN); 387 if (IS_ERR(ak4118->irq)) { 388 ret = PTR_ERR(ak4118->irq); 389 if (ret != -EPROBE_DEFER) 390 dev_err(&i2c->dev, "Failed to get IRQ: %d\n", ret); 391 return ret; 392 } 393 394 ret = devm_request_threaded_irq(&i2c->dev, gpiod_to_irq(ak4118->irq), 395 NULL, ak4118_irq_handler, 396 IRQF_TRIGGER_RISING | IRQF_ONESHOT, 397 "ak4118-irq", ak4118); 398 if (ret < 0) { 399 dev_err(&i2c->dev, "Fail to request_irq: %d\n", ret); 400 return ret; 401 } 402 403 return devm_snd_soc_register_component(&i2c->dev, 404 &soc_component_drv_ak4118, &ak4118_dai, 1); 405 } 406 407 #ifdef CONFIG_OF 408 static const struct of_device_id ak4118_of_match[] = { 409 { .compatible = "asahi-kasei,ak4118", }, 410 {} 411 }; 412 MODULE_DEVICE_TABLE(of, ak4118_of_match); 413 #endif 414 415 static const struct i2c_device_id ak4118_id_table[] = { 416 { "ak4118", 0 }, 417 {} 418 }; 419 MODULE_DEVICE_TABLE(i2c, ak4118_id_table); 420 421 static struct i2c_driver ak4118_i2c_driver = { 422 .driver = { 423 .name = "ak4118", 424 .of_match_table = of_match_ptr(ak4118_of_match), 425 }, 426 .id_table = ak4118_id_table, 427 .probe = ak4118_i2c_probe, 428 }; 429 430 module_i2c_driver(ak4118_i2c_driver); 431 432 MODULE_DESCRIPTION("Asahi Kasei AK4118 ALSA SoC driver"); 433 MODULE_AUTHOR("Adrien Charruel <adrien.charruel@devialet.com>"); 434 MODULE_LICENSE("GPL"); 435