1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * PCM3168A codec driver 4 * 5 * Copyright (C) 2015 Imagination Technologies Ltd. 6 * 7 * Author: Damien Horsley <Damien.Horsley@imgtec.com> 8 */ 9 10 #include <linux/clk.h> 11 #include <linux/delay.h> 12 #include <linux/gpio/consumer.h> 13 #include <linux/module.h> 14 #include <linux/of_gpio.h> 15 #include <linux/pm_runtime.h> 16 #include <linux/regulator/consumer.h> 17 18 #include <sound/pcm_params.h> 19 #include <sound/soc.h> 20 #include <sound/tlv.h> 21 22 #include "pcm3168a.h" 23 24 #define PCM3168A_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \ 25 SNDRV_PCM_FMTBIT_S24_3LE | \ 26 SNDRV_PCM_FMTBIT_S24_LE) 27 28 #define PCM3168A_FMT_I2S 0x0 29 #define PCM3168A_FMT_LEFT_J 0x1 30 #define PCM3168A_FMT_RIGHT_J 0x2 31 #define PCM3168A_FMT_RIGHT_J_16 0x3 32 #define PCM3168A_FMT_DSP_A 0x4 33 #define PCM3168A_FMT_DSP_B 0x5 34 #define PCM3168A_FMT_I2S_TDM 0x6 35 #define PCM3168A_FMT_LEFT_J_TDM 0x7 36 37 static const char *const pcm3168a_supply_names[] = { 38 "VDD1", 39 "VDD2", 40 "VCCAD1", 41 "VCCAD2", 42 "VCCDA1", 43 "VCCDA2" 44 }; 45 46 #define PCM3168A_DAI_DAC 0 47 #define PCM3168A_DAI_ADC 1 48 49 /* ADC/DAC side parameters */ 50 struct pcm3168a_io_params { 51 bool provider_mode; 52 unsigned int format; 53 int tdm_slots; 54 u32 tdm_mask; 55 int slot_width; 56 }; 57 58 struct pcm3168a_priv { 59 struct regulator_bulk_data supplies[ARRAY_SIZE(pcm3168a_supply_names)]; 60 struct regmap *regmap; 61 struct clk *scki; 62 struct gpio_desc *gpio_rst; 63 unsigned long sysclk; 64 65 struct pcm3168a_io_params io_params[2]; 66 struct snd_soc_dai_driver dai_drv[2]; 67 }; 68 69 static const char *const pcm3168a_roll_off[] = { "Sharp", "Slow" }; 70 71 static SOC_ENUM_SINGLE_DECL(pcm3168a_d1_roll_off, PCM3168A_DAC_OP_FLT, 72 PCM3168A_DAC_FLT_SHIFT, pcm3168a_roll_off); 73 static SOC_ENUM_SINGLE_DECL(pcm3168a_d2_roll_off, PCM3168A_DAC_OP_FLT, 74 PCM3168A_DAC_FLT_SHIFT + 1, pcm3168a_roll_off); 75 static SOC_ENUM_SINGLE_DECL(pcm3168a_d3_roll_off, PCM3168A_DAC_OP_FLT, 76 PCM3168A_DAC_FLT_SHIFT + 2, pcm3168a_roll_off); 77 static SOC_ENUM_SINGLE_DECL(pcm3168a_d4_roll_off, PCM3168A_DAC_OP_FLT, 78 PCM3168A_DAC_FLT_SHIFT + 3, pcm3168a_roll_off); 79 80 static const char *const pcm3168a_volume_type[] = { 81 "Individual", "Master + Individual" }; 82 83 static SOC_ENUM_SINGLE_DECL(pcm3168a_dac_volume_type, PCM3168A_DAC_ATT_DEMP_ZF, 84 PCM3168A_DAC_ATMDDA_SHIFT, pcm3168a_volume_type); 85 86 static const char *const pcm3168a_att_speed_mult[] = { "2048", "4096" }; 87 88 static SOC_ENUM_SINGLE_DECL(pcm3168a_dac_att_mult, PCM3168A_DAC_ATT_DEMP_ZF, 89 PCM3168A_DAC_ATSPDA_SHIFT, pcm3168a_att_speed_mult); 90 91 static const char *const pcm3168a_demp[] = { 92 "Disabled", "48khz", "44.1khz", "32khz" }; 93 94 static SOC_ENUM_SINGLE_DECL(pcm3168a_dac_demp, PCM3168A_DAC_ATT_DEMP_ZF, 95 PCM3168A_DAC_DEMP_SHIFT, pcm3168a_demp); 96 97 static const char *const pcm3168a_zf_func[] = { 98 "DAC 1/2/3/4 AND", "DAC 1/2/3/4 OR", "DAC 1/2/3 AND", 99 "DAC 1/2/3 OR", "DAC 4 AND", "DAC 4 OR" }; 100 101 static SOC_ENUM_SINGLE_DECL(pcm3168a_dac_zf_func, PCM3168A_DAC_ATT_DEMP_ZF, 102 PCM3168A_DAC_AZRO_SHIFT, pcm3168a_zf_func); 103 104 static const char *const pcm3168a_pol[] = { "Active High", "Active Low" }; 105 106 static SOC_ENUM_SINGLE_DECL(pcm3168a_dac_zf_pol, PCM3168A_DAC_ATT_DEMP_ZF, 107 PCM3168A_DAC_ATSPDA_SHIFT, pcm3168a_pol); 108 109 static const char *const pcm3168a_con[] = { "Differential", "Single-Ended" }; 110 111 static SOC_ENUM_DOUBLE_DECL(pcm3168a_adc1_con, PCM3168A_ADC_SEAD, 112 0, 1, pcm3168a_con); 113 static SOC_ENUM_DOUBLE_DECL(pcm3168a_adc2_con, PCM3168A_ADC_SEAD, 114 2, 3, pcm3168a_con); 115 static SOC_ENUM_DOUBLE_DECL(pcm3168a_adc3_con, PCM3168A_ADC_SEAD, 116 4, 5, pcm3168a_con); 117 118 static SOC_ENUM_SINGLE_DECL(pcm3168a_adc_volume_type, PCM3168A_ADC_ATT_OVF, 119 PCM3168A_ADC_ATMDAD_SHIFT, pcm3168a_volume_type); 120 121 static SOC_ENUM_SINGLE_DECL(pcm3168a_adc_att_mult, PCM3168A_ADC_ATT_OVF, 122 PCM3168A_ADC_ATSPAD_SHIFT, pcm3168a_att_speed_mult); 123 124 static SOC_ENUM_SINGLE_DECL(pcm3168a_adc_ov_pol, PCM3168A_ADC_ATT_OVF, 125 PCM3168A_ADC_OVFP_SHIFT, pcm3168a_pol); 126 127 /* -100db to 0db, register values 0-54 cause mute */ 128 static const DECLARE_TLV_DB_SCALE(pcm3168a_dac_tlv, -10050, 50, 1); 129 130 /* -100db to 20db, register values 0-14 cause mute */ 131 static const DECLARE_TLV_DB_SCALE(pcm3168a_adc_tlv, -10050, 50, 1); 132 133 static const struct snd_kcontrol_new pcm3168a_snd_controls[] = { 134 SOC_SINGLE("DAC Power-Save Switch", PCM3168A_DAC_PWR_MST_FMT, 135 PCM3168A_DAC_PSMDA_SHIFT, 1, 1), 136 SOC_ENUM("DAC1 Digital Filter roll-off", pcm3168a_d1_roll_off), 137 SOC_ENUM("DAC2 Digital Filter roll-off", pcm3168a_d2_roll_off), 138 SOC_ENUM("DAC3 Digital Filter roll-off", pcm3168a_d3_roll_off), 139 SOC_ENUM("DAC4 Digital Filter roll-off", pcm3168a_d4_roll_off), 140 SOC_DOUBLE("DAC1 Invert Switch", PCM3168A_DAC_INV, 0, 1, 1, 0), 141 SOC_DOUBLE("DAC2 Invert Switch", PCM3168A_DAC_INV, 2, 3, 1, 0), 142 SOC_DOUBLE("DAC3 Invert Switch", PCM3168A_DAC_INV, 4, 5, 1, 0), 143 SOC_DOUBLE("DAC4 Invert Switch", PCM3168A_DAC_INV, 6, 7, 1, 0), 144 SOC_ENUM("DAC Volume Control Type", pcm3168a_dac_volume_type), 145 SOC_ENUM("DAC Volume Rate Multiplier", pcm3168a_dac_att_mult), 146 SOC_ENUM("DAC De-Emphasis", pcm3168a_dac_demp), 147 SOC_ENUM("DAC Zero Flag Function", pcm3168a_dac_zf_func), 148 SOC_ENUM("DAC Zero Flag Polarity", pcm3168a_dac_zf_pol), 149 SOC_SINGLE_RANGE_TLV("Master Playback Volume", 150 PCM3168A_DAC_VOL_MASTER, 0, 54, 255, 0, 151 pcm3168a_dac_tlv), 152 SOC_DOUBLE_R_RANGE_TLV("DAC1 Playback Volume", 153 PCM3168A_DAC_VOL_CHAN_START, 154 PCM3168A_DAC_VOL_CHAN_START + 1, 155 0, 54, 255, 0, pcm3168a_dac_tlv), 156 SOC_DOUBLE_R_RANGE_TLV("DAC2 Playback Volume", 157 PCM3168A_DAC_VOL_CHAN_START + 2, 158 PCM3168A_DAC_VOL_CHAN_START + 3, 159 0, 54, 255, 0, pcm3168a_dac_tlv), 160 SOC_DOUBLE_R_RANGE_TLV("DAC3 Playback Volume", 161 PCM3168A_DAC_VOL_CHAN_START + 4, 162 PCM3168A_DAC_VOL_CHAN_START + 5, 163 0, 54, 255, 0, pcm3168a_dac_tlv), 164 SOC_DOUBLE_R_RANGE_TLV("DAC4 Playback Volume", 165 PCM3168A_DAC_VOL_CHAN_START + 6, 166 PCM3168A_DAC_VOL_CHAN_START + 7, 167 0, 54, 255, 0, pcm3168a_dac_tlv), 168 SOC_SINGLE("ADC1 High-Pass Filter Switch", PCM3168A_ADC_PWR_HPFB, 169 PCM3168A_ADC_BYP_SHIFT, 1, 1), 170 SOC_SINGLE("ADC2 High-Pass Filter Switch", PCM3168A_ADC_PWR_HPFB, 171 PCM3168A_ADC_BYP_SHIFT + 1, 1, 1), 172 SOC_SINGLE("ADC3 High-Pass Filter Switch", PCM3168A_ADC_PWR_HPFB, 173 PCM3168A_ADC_BYP_SHIFT + 2, 1, 1), 174 SOC_ENUM("ADC1 Connection Type", pcm3168a_adc1_con), 175 SOC_ENUM("ADC2 Connection Type", pcm3168a_adc2_con), 176 SOC_ENUM("ADC3 Connection Type", pcm3168a_adc3_con), 177 SOC_DOUBLE("ADC1 Invert Switch", PCM3168A_ADC_INV, 0, 1, 1, 0), 178 SOC_DOUBLE("ADC2 Invert Switch", PCM3168A_ADC_INV, 2, 3, 1, 0), 179 SOC_DOUBLE("ADC3 Invert Switch", PCM3168A_ADC_INV, 4, 5, 1, 0), 180 SOC_DOUBLE("ADC1 Mute Switch", PCM3168A_ADC_MUTE, 0, 1, 1, 0), 181 SOC_DOUBLE("ADC2 Mute Switch", PCM3168A_ADC_MUTE, 2, 3, 1, 0), 182 SOC_DOUBLE("ADC3 Mute Switch", PCM3168A_ADC_MUTE, 4, 5, 1, 0), 183 SOC_ENUM("ADC Volume Control Type", pcm3168a_adc_volume_type), 184 SOC_ENUM("ADC Volume Rate Multiplier", pcm3168a_adc_att_mult), 185 SOC_ENUM("ADC Overflow Flag Polarity", pcm3168a_adc_ov_pol), 186 SOC_SINGLE_RANGE_TLV("Master Capture Volume", 187 PCM3168A_ADC_VOL_MASTER, 0, 14, 255, 0, 188 pcm3168a_adc_tlv), 189 SOC_DOUBLE_R_RANGE_TLV("ADC1 Capture Volume", 190 PCM3168A_ADC_VOL_CHAN_START, 191 PCM3168A_ADC_VOL_CHAN_START + 1, 192 0, 14, 255, 0, pcm3168a_adc_tlv), 193 SOC_DOUBLE_R_RANGE_TLV("ADC2 Capture Volume", 194 PCM3168A_ADC_VOL_CHAN_START + 2, 195 PCM3168A_ADC_VOL_CHAN_START + 3, 196 0, 14, 255, 0, pcm3168a_adc_tlv), 197 SOC_DOUBLE_R_RANGE_TLV("ADC3 Capture Volume", 198 PCM3168A_ADC_VOL_CHAN_START + 4, 199 PCM3168A_ADC_VOL_CHAN_START + 5, 200 0, 14, 255, 0, pcm3168a_adc_tlv) 201 }; 202 203 static const struct snd_soc_dapm_widget pcm3168a_dapm_widgets[] = { 204 SND_SOC_DAPM_DAC("DAC1", "Playback", PCM3168A_DAC_OP_FLT, 205 PCM3168A_DAC_OPEDA_SHIFT, 1), 206 SND_SOC_DAPM_DAC("DAC2", "Playback", PCM3168A_DAC_OP_FLT, 207 PCM3168A_DAC_OPEDA_SHIFT + 1, 1), 208 SND_SOC_DAPM_DAC("DAC3", "Playback", PCM3168A_DAC_OP_FLT, 209 PCM3168A_DAC_OPEDA_SHIFT + 2, 1), 210 SND_SOC_DAPM_DAC("DAC4", "Playback", PCM3168A_DAC_OP_FLT, 211 PCM3168A_DAC_OPEDA_SHIFT + 3, 1), 212 213 SND_SOC_DAPM_OUTPUT("AOUT1L"), 214 SND_SOC_DAPM_OUTPUT("AOUT1R"), 215 SND_SOC_DAPM_OUTPUT("AOUT2L"), 216 SND_SOC_DAPM_OUTPUT("AOUT2R"), 217 SND_SOC_DAPM_OUTPUT("AOUT3L"), 218 SND_SOC_DAPM_OUTPUT("AOUT3R"), 219 SND_SOC_DAPM_OUTPUT("AOUT4L"), 220 SND_SOC_DAPM_OUTPUT("AOUT4R"), 221 222 SND_SOC_DAPM_ADC("ADC1", "Capture", PCM3168A_ADC_PWR_HPFB, 223 PCM3168A_ADC_PSVAD_SHIFT, 1), 224 SND_SOC_DAPM_ADC("ADC2", "Capture", PCM3168A_ADC_PWR_HPFB, 225 PCM3168A_ADC_PSVAD_SHIFT + 1, 1), 226 SND_SOC_DAPM_ADC("ADC3", "Capture", PCM3168A_ADC_PWR_HPFB, 227 PCM3168A_ADC_PSVAD_SHIFT + 2, 1), 228 229 SND_SOC_DAPM_INPUT("AIN1L"), 230 SND_SOC_DAPM_INPUT("AIN1R"), 231 SND_SOC_DAPM_INPUT("AIN2L"), 232 SND_SOC_DAPM_INPUT("AIN2R"), 233 SND_SOC_DAPM_INPUT("AIN3L"), 234 SND_SOC_DAPM_INPUT("AIN3R") 235 }; 236 237 static const struct snd_soc_dapm_route pcm3168a_dapm_routes[] = { 238 /* Playback */ 239 { "AOUT1L", NULL, "DAC1" }, 240 { "AOUT1R", NULL, "DAC1" }, 241 242 { "AOUT2L", NULL, "DAC2" }, 243 { "AOUT2R", NULL, "DAC2" }, 244 245 { "AOUT3L", NULL, "DAC3" }, 246 { "AOUT3R", NULL, "DAC3" }, 247 248 { "AOUT4L", NULL, "DAC4" }, 249 { "AOUT4R", NULL, "DAC4" }, 250 251 /* Capture */ 252 { "ADC1", NULL, "AIN1L" }, 253 { "ADC1", NULL, "AIN1R" }, 254 255 { "ADC2", NULL, "AIN2L" }, 256 { "ADC2", NULL, "AIN2R" }, 257 258 { "ADC3", NULL, "AIN3L" }, 259 { "ADC3", NULL, "AIN3R" } 260 }; 261 262 static unsigned int pcm3168a_scki_ratios[] = { 263 768, 264 512, 265 384, 266 256, 267 192, 268 128 269 }; 270 271 #define PCM3168A_NUM_SCKI_RATIOS_DAC ARRAY_SIZE(pcm3168a_scki_ratios) 272 #define PCM3168A_NUM_SCKI_RATIOS_ADC (ARRAY_SIZE(pcm3168a_scki_ratios) - 2) 273 274 #define PCM3168A_MAX_SYSCLK 36864000 275 276 static int pcm3168a_reset(struct pcm3168a_priv *pcm3168a) 277 { 278 int ret; 279 280 ret = regmap_write(pcm3168a->regmap, PCM3168A_RST_SMODE, 0); 281 if (ret) 282 return ret; 283 284 /* Internal reset is de-asserted after 3846 SCKI cycles */ 285 msleep(DIV_ROUND_UP(3846 * 1000, pcm3168a->sysclk)); 286 287 return regmap_write(pcm3168a->regmap, PCM3168A_RST_SMODE, 288 PCM3168A_MRST_MASK | PCM3168A_SRST_MASK); 289 } 290 291 static int pcm3168a_mute(struct snd_soc_dai *dai, int mute, int direction) 292 { 293 struct snd_soc_component *component = dai->component; 294 struct pcm3168a_priv *pcm3168a = snd_soc_component_get_drvdata(component); 295 296 regmap_write(pcm3168a->regmap, PCM3168A_DAC_MUTE, mute ? 0xff : 0); 297 298 return 0; 299 } 300 301 static int pcm3168a_set_dai_sysclk(struct snd_soc_dai *dai, 302 int clk_id, unsigned int freq, int dir) 303 { 304 struct pcm3168a_priv *pcm3168a = snd_soc_component_get_drvdata(dai->component); 305 int ret; 306 307 /* 308 * Some sound card sets 0 Hz as reset, 309 * but it is impossible to set. Ignore it here 310 */ 311 if (freq == 0) 312 return 0; 313 314 if (freq > PCM3168A_MAX_SYSCLK) 315 return -EINVAL; 316 317 ret = clk_set_rate(pcm3168a->scki, freq); 318 if (ret) 319 return ret; 320 321 pcm3168a->sysclk = freq; 322 323 return 0; 324 } 325 326 static void pcm3168a_update_fixup_pcm_stream(struct snd_soc_dai *dai) 327 { 328 struct snd_soc_component *component = dai->component; 329 struct pcm3168a_priv *pcm3168a = snd_soc_component_get_drvdata(component); 330 struct pcm3168a_io_params *io_params = &pcm3168a->io_params[dai->id]; 331 u64 formats = SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_LE; 332 unsigned int channel_max = dai->id == PCM3168A_DAI_DAC ? 8 : 6; 333 334 if (io_params->format == SND_SOC_DAIFMT_RIGHT_J) { 335 /* S16_LE is only supported in RIGHT_J mode */ 336 formats |= SNDRV_PCM_FMTBIT_S16_LE; 337 338 /* 339 * If multi DIN/DOUT is not selected, RIGHT_J can only support 340 * two channels (no TDM support) 341 */ 342 if (io_params->tdm_slots != 2) 343 channel_max = 2; 344 } 345 346 if (dai->id == PCM3168A_DAI_DAC) { 347 dai->driver->playback.channels_max = channel_max; 348 dai->driver->playback.formats = formats; 349 } else { 350 dai->driver->capture.channels_max = channel_max; 351 dai->driver->capture.formats = formats; 352 } 353 } 354 355 static int pcm3168a_set_dai_fmt(struct snd_soc_dai *dai, unsigned int format) 356 { 357 struct snd_soc_component *component = dai->component; 358 struct pcm3168a_priv *pcm3168a = snd_soc_component_get_drvdata(component); 359 struct pcm3168a_io_params *io_params = &pcm3168a->io_params[dai->id]; 360 bool provider_mode; 361 362 switch (format & SND_SOC_DAIFMT_FORMAT_MASK) { 363 case SND_SOC_DAIFMT_LEFT_J: 364 case SND_SOC_DAIFMT_I2S: 365 case SND_SOC_DAIFMT_RIGHT_J: 366 case SND_SOC_DAIFMT_DSP_A: 367 case SND_SOC_DAIFMT_DSP_B: 368 break; 369 default: 370 dev_err(component->dev, "unsupported dai format\n"); 371 return -EINVAL; 372 } 373 374 switch (format & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) { 375 case SND_SOC_DAIFMT_CBC_CFC: 376 provider_mode = false; 377 break; 378 case SND_SOC_DAIFMT_CBP_CFP: 379 provider_mode = true; 380 break; 381 default: 382 dev_err(component->dev, "unsupported provider mode\n"); 383 return -EINVAL; 384 } 385 386 switch (format & SND_SOC_DAIFMT_INV_MASK) { 387 case SND_SOC_DAIFMT_NB_NF: 388 break; 389 default: 390 return -EINVAL; 391 } 392 393 io_params->provider_mode = provider_mode; 394 io_params->format = format & SND_SOC_DAIFMT_FORMAT_MASK; 395 396 pcm3168a_update_fixup_pcm_stream(dai); 397 398 return 0; 399 } 400 401 static int pcm3168a_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask, 402 unsigned int rx_mask, int slots, 403 int slot_width) 404 { 405 struct snd_soc_component *component = dai->component; 406 struct pcm3168a_priv *pcm3168a = snd_soc_component_get_drvdata(component); 407 struct pcm3168a_io_params *io_params = &pcm3168a->io_params[dai->id]; 408 409 if (tx_mask >= (1<<slots) || rx_mask >= (1<<slots)) { 410 dev_err(component->dev, 411 "Bad tdm mask tx: 0x%08x rx: 0x%08x slots %d\n", 412 tx_mask, rx_mask, slots); 413 return -EINVAL; 414 } 415 416 if (slot_width && 417 (slot_width != 16 && slot_width != 24 && slot_width != 32 )) { 418 dev_err(component->dev, "Unsupported slot_width %d\n", 419 slot_width); 420 return -EINVAL; 421 } 422 423 io_params->tdm_slots = slots; 424 io_params->slot_width = slot_width; 425 /* Ignore the not relevant mask for the DAI/direction */ 426 if (dai->id == PCM3168A_DAI_DAC) 427 io_params->tdm_mask = tx_mask; 428 else 429 io_params->tdm_mask = rx_mask; 430 431 pcm3168a_update_fixup_pcm_stream(dai); 432 433 return 0; 434 } 435 436 static int pcm3168a_hw_params(struct snd_pcm_substream *substream, 437 struct snd_pcm_hw_params *params, 438 struct snd_soc_dai *dai) 439 { 440 struct snd_soc_component *component = dai->component; 441 struct pcm3168a_priv *pcm3168a = snd_soc_component_get_drvdata(component); 442 struct pcm3168a_io_params *io_params = &pcm3168a->io_params[dai->id]; 443 bool provider_mode, tdm_mode; 444 unsigned int format; 445 unsigned int reg, mask, ms, ms_shift, fmt, fmt_shift, ratio, tdm_slots; 446 int i, num_scki_ratios, slot_width; 447 448 if (dai->id == PCM3168A_DAI_DAC) { 449 num_scki_ratios = PCM3168A_NUM_SCKI_RATIOS_DAC; 450 reg = PCM3168A_DAC_PWR_MST_FMT; 451 mask = PCM3168A_DAC_MSDA_MASK | PCM3168A_DAC_FMT_MASK; 452 ms_shift = PCM3168A_DAC_MSDA_SHIFT; 453 fmt_shift = PCM3168A_DAC_FMT_SHIFT; 454 } else { 455 num_scki_ratios = PCM3168A_NUM_SCKI_RATIOS_ADC; 456 reg = PCM3168A_ADC_MST_FMT; 457 mask = PCM3168A_ADC_MSAD_MASK | PCM3168A_ADC_FMTAD_MASK; 458 ms_shift = PCM3168A_ADC_MSAD_SHIFT; 459 fmt_shift = PCM3168A_ADC_FMTAD_SHIFT; 460 } 461 462 provider_mode = io_params->provider_mode; 463 464 if (provider_mode) { 465 ratio = pcm3168a->sysclk / params_rate(params); 466 467 for (i = 0; i < num_scki_ratios; i++) { 468 if (pcm3168a_scki_ratios[i] == ratio) 469 break; 470 } 471 472 if (i == num_scki_ratios) { 473 dev_err(component->dev, "unsupported sysclk ratio\n"); 474 return -EINVAL; 475 } 476 477 ms = (i + 1); 478 } else { 479 ms = 0; 480 } 481 482 format = io_params->format; 483 484 if (io_params->slot_width) 485 slot_width = io_params->slot_width; 486 else 487 slot_width = params_width(params); 488 489 switch (slot_width) { 490 case 16: 491 if (provider_mode || (format != SND_SOC_DAIFMT_RIGHT_J)) { 492 dev_err(component->dev, "16-bit slots are supported only for consumer mode using right justified\n"); 493 return -EINVAL; 494 } 495 break; 496 case 24: 497 if (provider_mode || (format == SND_SOC_DAIFMT_DSP_A) || 498 (format == SND_SOC_DAIFMT_DSP_B)) { 499 dev_err(component->dev, "24-bit slots not supported in provider mode, or consumer mode using DSP\n"); 500 return -EINVAL; 501 } 502 break; 503 case 32: 504 break; 505 default: 506 dev_err(component->dev, "unsupported frame size: %d\n", slot_width); 507 return -EINVAL; 508 } 509 510 if (io_params->tdm_slots) 511 tdm_slots = io_params->tdm_slots; 512 else 513 tdm_slots = params_channels(params); 514 515 /* 516 * Switch the codec to TDM mode when more than 2 TDM slots are needed 517 * for the stream. 518 * If pcm3168a->tdm_slots is not set or set to more than 2 (8/6 usually) 519 * then DIN1/DOUT1 is used in TDM mode. 520 * If pcm3168a->tdm_slots is set to 2 then DIN1/2/3/4 and DOUT1/2/3 is 521 * used in normal mode, no need to switch to TDM modes. 522 */ 523 tdm_mode = (tdm_slots > 2); 524 525 if (tdm_mode) { 526 switch (format) { 527 case SND_SOC_DAIFMT_I2S: 528 case SND_SOC_DAIFMT_DSP_A: 529 case SND_SOC_DAIFMT_LEFT_J: 530 case SND_SOC_DAIFMT_DSP_B: 531 break; 532 default: 533 dev_err(component->dev, 534 "TDM is supported under DSP/I2S/Left_J only\n"); 535 return -EINVAL; 536 } 537 } 538 539 switch (format) { 540 case SND_SOC_DAIFMT_I2S: 541 fmt = tdm_mode ? PCM3168A_FMT_I2S_TDM : PCM3168A_FMT_I2S; 542 break; 543 case SND_SOC_DAIFMT_LEFT_J: 544 fmt = tdm_mode ? PCM3168A_FMT_LEFT_J_TDM : PCM3168A_FMT_LEFT_J; 545 break; 546 case SND_SOC_DAIFMT_RIGHT_J: 547 fmt = (slot_width == 16) ? PCM3168A_FMT_RIGHT_J_16 : 548 PCM3168A_FMT_RIGHT_J; 549 break; 550 case SND_SOC_DAIFMT_DSP_A: 551 fmt = tdm_mode ? PCM3168A_FMT_I2S_TDM : PCM3168A_FMT_DSP_A; 552 break; 553 case SND_SOC_DAIFMT_DSP_B: 554 fmt = tdm_mode ? PCM3168A_FMT_LEFT_J_TDM : PCM3168A_FMT_DSP_B; 555 break; 556 default: 557 return -EINVAL; 558 } 559 560 regmap_update_bits(pcm3168a->regmap, reg, mask, 561 (ms << ms_shift) | (fmt << fmt_shift)); 562 563 return 0; 564 } 565 566 static u64 pcm3168a_dai_formats[] = { 567 /* 568 * Select below from Sound Card, not here 569 * SND_SOC_DAIFMT_CBC_CFC 570 * SND_SOC_DAIFMT_CBP_CFP 571 */ 572 573 /* 574 * First Priority 575 */ 576 SND_SOC_POSSIBLE_DAIFMT_I2S | 577 SND_SOC_POSSIBLE_DAIFMT_LEFT_J, 578 /* 579 * Second Priority 580 * 581 * These have picky limitation. 582 * see 583 * pcm3168a_hw_params() 584 */ 585 SND_SOC_POSSIBLE_DAIFMT_RIGHT_J | 586 SND_SOC_POSSIBLE_DAIFMT_DSP_A | 587 SND_SOC_POSSIBLE_DAIFMT_DSP_B, 588 }; 589 590 static const struct snd_soc_dai_ops pcm3168a_dai_ops = { 591 .set_fmt = pcm3168a_set_dai_fmt, 592 .set_sysclk = pcm3168a_set_dai_sysclk, 593 .hw_params = pcm3168a_hw_params, 594 .mute_stream = pcm3168a_mute, 595 .set_tdm_slot = pcm3168a_set_tdm_slot, 596 .no_capture_mute = 1, 597 .auto_selectable_formats = pcm3168a_dai_formats, 598 .num_auto_selectable_formats = ARRAY_SIZE(pcm3168a_dai_formats), 599 }; 600 601 static struct snd_soc_dai_driver pcm3168a_dais[] = { 602 { 603 .name = "pcm3168a-dac", 604 .id = PCM3168A_DAI_DAC, 605 .playback = { 606 .stream_name = "Playback", 607 .channels_min = 1, 608 .channels_max = 8, 609 .rates = SNDRV_PCM_RATE_8000_192000, 610 .formats = PCM3168A_FORMATS 611 }, 612 .ops = &pcm3168a_dai_ops 613 }, 614 { 615 .name = "pcm3168a-adc", 616 .id = PCM3168A_DAI_ADC, 617 .capture = { 618 .stream_name = "Capture", 619 .channels_min = 1, 620 .channels_max = 6, 621 .rates = SNDRV_PCM_RATE_8000_96000, 622 .formats = PCM3168A_FORMATS 623 }, 624 .ops = &pcm3168a_dai_ops 625 }, 626 }; 627 628 static const struct reg_default pcm3168a_reg_default[] = { 629 { PCM3168A_RST_SMODE, PCM3168A_MRST_MASK | PCM3168A_SRST_MASK }, 630 { PCM3168A_DAC_PWR_MST_FMT, 0x00 }, 631 { PCM3168A_DAC_OP_FLT, 0x00 }, 632 { PCM3168A_DAC_INV, 0x00 }, 633 { PCM3168A_DAC_MUTE, 0x00 }, 634 { PCM3168A_DAC_ZERO, 0x00 }, 635 { PCM3168A_DAC_ATT_DEMP_ZF, 0x00 }, 636 { PCM3168A_DAC_VOL_MASTER, 0xff }, 637 { PCM3168A_DAC_VOL_CHAN_START, 0xff }, 638 { PCM3168A_DAC_VOL_CHAN_START + 1, 0xff }, 639 { PCM3168A_DAC_VOL_CHAN_START + 2, 0xff }, 640 { PCM3168A_DAC_VOL_CHAN_START + 3, 0xff }, 641 { PCM3168A_DAC_VOL_CHAN_START + 4, 0xff }, 642 { PCM3168A_DAC_VOL_CHAN_START + 5, 0xff }, 643 { PCM3168A_DAC_VOL_CHAN_START + 6, 0xff }, 644 { PCM3168A_DAC_VOL_CHAN_START + 7, 0xff }, 645 { PCM3168A_ADC_SMODE, 0x00 }, 646 { PCM3168A_ADC_MST_FMT, 0x00 }, 647 { PCM3168A_ADC_PWR_HPFB, 0x00 }, 648 { PCM3168A_ADC_SEAD, 0x00 }, 649 { PCM3168A_ADC_INV, 0x00 }, 650 { PCM3168A_ADC_MUTE, 0x00 }, 651 { PCM3168A_ADC_OV, 0x00 }, 652 { PCM3168A_ADC_ATT_OVF, 0x00 }, 653 { PCM3168A_ADC_VOL_MASTER, 0xd3 }, 654 { PCM3168A_ADC_VOL_CHAN_START, 0xd3 }, 655 { PCM3168A_ADC_VOL_CHAN_START + 1, 0xd3 }, 656 { PCM3168A_ADC_VOL_CHAN_START + 2, 0xd3 }, 657 { PCM3168A_ADC_VOL_CHAN_START + 3, 0xd3 }, 658 { PCM3168A_ADC_VOL_CHAN_START + 4, 0xd3 }, 659 { PCM3168A_ADC_VOL_CHAN_START + 5, 0xd3 } 660 }; 661 662 static bool pcm3168a_readable_register(struct device *dev, unsigned int reg) 663 { 664 if (reg >= PCM3168A_RST_SMODE) 665 return true; 666 else 667 return false; 668 } 669 670 static bool pcm3168a_volatile_register(struct device *dev, unsigned int reg) 671 { 672 switch (reg) { 673 case PCM3168A_RST_SMODE: 674 case PCM3168A_DAC_ZERO: 675 case PCM3168A_ADC_OV: 676 return true; 677 default: 678 return false; 679 } 680 } 681 682 static bool pcm3168a_writeable_register(struct device *dev, unsigned int reg) 683 { 684 if (reg < PCM3168A_RST_SMODE) 685 return false; 686 687 switch (reg) { 688 case PCM3168A_DAC_ZERO: 689 case PCM3168A_ADC_OV: 690 return false; 691 default: 692 return true; 693 } 694 } 695 696 const struct regmap_config pcm3168a_regmap = { 697 .reg_bits = 8, 698 .val_bits = 8, 699 700 .max_register = PCM3168A_ADC_VOL_CHAN_START + 5, 701 .reg_defaults = pcm3168a_reg_default, 702 .num_reg_defaults = ARRAY_SIZE(pcm3168a_reg_default), 703 .readable_reg = pcm3168a_readable_register, 704 .volatile_reg = pcm3168a_volatile_register, 705 .writeable_reg = pcm3168a_writeable_register, 706 .cache_type = REGCACHE_FLAT 707 }; 708 EXPORT_SYMBOL_GPL(pcm3168a_regmap); 709 710 static const struct snd_soc_component_driver pcm3168a_driver = { 711 .controls = pcm3168a_snd_controls, 712 .num_controls = ARRAY_SIZE(pcm3168a_snd_controls), 713 .dapm_widgets = pcm3168a_dapm_widgets, 714 .num_dapm_widgets = ARRAY_SIZE(pcm3168a_dapm_widgets), 715 .dapm_routes = pcm3168a_dapm_routes, 716 .num_dapm_routes = ARRAY_SIZE(pcm3168a_dapm_routes), 717 .use_pmdown_time = 1, 718 .endianness = 1, 719 }; 720 721 int pcm3168a_probe(struct device *dev, struct regmap *regmap) 722 { 723 struct pcm3168a_priv *pcm3168a; 724 int ret, i; 725 726 pcm3168a = devm_kzalloc(dev, sizeof(*pcm3168a), GFP_KERNEL); 727 if (pcm3168a == NULL) 728 return -ENOMEM; 729 730 dev_set_drvdata(dev, pcm3168a); 731 732 /* 733 * Request the reset (connected to RST pin) gpio line as non exclusive 734 * as the same reset line might be connected to multiple pcm3168a codec 735 * 736 * The RST is low active, we want the GPIO line to be high initially, so 737 * request the initial level to LOW which in practice means DEASSERTED: 738 * The deasserted level of GPIO_ACTIVE_LOW is HIGH. 739 */ 740 pcm3168a->gpio_rst = devm_gpiod_get_optional(dev, "reset", 741 GPIOD_OUT_LOW | 742 GPIOD_FLAGS_BIT_NONEXCLUSIVE); 743 if (IS_ERR(pcm3168a->gpio_rst)) 744 return dev_err_probe(dev, PTR_ERR(pcm3168a->gpio_rst), 745 "failed to acquire RST gpio\n"); 746 747 pcm3168a->scki = devm_clk_get(dev, "scki"); 748 if (IS_ERR(pcm3168a->scki)) 749 return dev_err_probe(dev, PTR_ERR(pcm3168a->scki), 750 "failed to acquire clock 'scki'\n"); 751 752 ret = clk_prepare_enable(pcm3168a->scki); 753 if (ret) { 754 dev_err(dev, "Failed to enable mclk: %d\n", ret); 755 return ret; 756 } 757 758 pcm3168a->sysclk = clk_get_rate(pcm3168a->scki); 759 760 for (i = 0; i < ARRAY_SIZE(pcm3168a->supplies); i++) 761 pcm3168a->supplies[i].supply = pcm3168a_supply_names[i]; 762 763 ret = devm_regulator_bulk_get(dev, 764 ARRAY_SIZE(pcm3168a->supplies), pcm3168a->supplies); 765 if (ret) { 766 dev_err_probe(dev, ret, "failed to request supplies\n"); 767 goto err_clk; 768 } 769 770 ret = regulator_bulk_enable(ARRAY_SIZE(pcm3168a->supplies), 771 pcm3168a->supplies); 772 if (ret) { 773 dev_err(dev, "failed to enable supplies: %d\n", ret); 774 goto err_clk; 775 } 776 777 pcm3168a->regmap = regmap; 778 if (IS_ERR(pcm3168a->regmap)) { 779 ret = PTR_ERR(pcm3168a->regmap); 780 dev_err(dev, "failed to allocate regmap: %d\n", ret); 781 goto err_regulator; 782 } 783 784 if (pcm3168a->gpio_rst) { 785 /* 786 * The device is taken out from reset via GPIO line, wait for 787 * 3846 SCKI clock cycles for the internal reset de-assertion 788 */ 789 msleep(DIV_ROUND_UP(3846 * 1000, pcm3168a->sysclk)); 790 } else { 791 ret = pcm3168a_reset(pcm3168a); 792 if (ret) { 793 dev_err(dev, "Failed to reset device: %d\n", ret); 794 goto err_regulator; 795 } 796 } 797 798 pm_runtime_set_active(dev); 799 pm_runtime_enable(dev); 800 pm_runtime_idle(dev); 801 802 memcpy(pcm3168a->dai_drv, pcm3168a_dais, sizeof(pcm3168a->dai_drv)); 803 ret = devm_snd_soc_register_component(dev, &pcm3168a_driver, 804 pcm3168a->dai_drv, 805 ARRAY_SIZE(pcm3168a->dai_drv)); 806 if (ret) { 807 dev_err(dev, "failed to register component: %d\n", ret); 808 goto err_regulator; 809 } 810 811 return 0; 812 813 err_regulator: 814 regulator_bulk_disable(ARRAY_SIZE(pcm3168a->supplies), 815 pcm3168a->supplies); 816 err_clk: 817 clk_disable_unprepare(pcm3168a->scki); 818 819 return ret; 820 } 821 EXPORT_SYMBOL_GPL(pcm3168a_probe); 822 823 static void pcm3168a_disable(struct device *dev) 824 { 825 struct pcm3168a_priv *pcm3168a = dev_get_drvdata(dev); 826 827 regulator_bulk_disable(ARRAY_SIZE(pcm3168a->supplies), 828 pcm3168a->supplies); 829 clk_disable_unprepare(pcm3168a->scki); 830 } 831 832 void pcm3168a_remove(struct device *dev) 833 { 834 struct pcm3168a_priv *pcm3168a = dev_get_drvdata(dev); 835 836 /* 837 * The RST is low active, we want the GPIO line to be low when the 838 * driver is removed, so set level to 1 which in practice means 839 * ASSERTED: 840 * The asserted level of GPIO_ACTIVE_LOW is LOW. 841 */ 842 gpiod_set_value_cansleep(pcm3168a->gpio_rst, 1); 843 pm_runtime_disable(dev); 844 #ifndef CONFIG_PM 845 pcm3168a_disable(dev); 846 #endif 847 } 848 EXPORT_SYMBOL_GPL(pcm3168a_remove); 849 850 #ifdef CONFIG_PM 851 static int pcm3168a_rt_resume(struct device *dev) 852 { 853 struct pcm3168a_priv *pcm3168a = dev_get_drvdata(dev); 854 int ret; 855 856 ret = clk_prepare_enable(pcm3168a->scki); 857 if (ret) { 858 dev_err(dev, "Failed to enable mclk: %d\n", ret); 859 return ret; 860 } 861 862 ret = regulator_bulk_enable(ARRAY_SIZE(pcm3168a->supplies), 863 pcm3168a->supplies); 864 if (ret) { 865 dev_err(dev, "Failed to enable supplies: %d\n", ret); 866 goto err_clk; 867 } 868 869 ret = pcm3168a_reset(pcm3168a); 870 if (ret) { 871 dev_err(dev, "Failed to reset device: %d\n", ret); 872 goto err_regulator; 873 } 874 875 regcache_cache_only(pcm3168a->regmap, false); 876 877 regcache_mark_dirty(pcm3168a->regmap); 878 879 ret = regcache_sync(pcm3168a->regmap); 880 if (ret) { 881 dev_err(dev, "Failed to sync regmap: %d\n", ret); 882 goto err_regulator; 883 } 884 885 return 0; 886 887 err_regulator: 888 regulator_bulk_disable(ARRAY_SIZE(pcm3168a->supplies), 889 pcm3168a->supplies); 890 err_clk: 891 clk_disable_unprepare(pcm3168a->scki); 892 893 return ret; 894 } 895 896 static int pcm3168a_rt_suspend(struct device *dev) 897 { 898 struct pcm3168a_priv *pcm3168a = dev_get_drvdata(dev); 899 900 regcache_cache_only(pcm3168a->regmap, true); 901 902 pcm3168a_disable(dev); 903 904 return 0; 905 } 906 #endif 907 908 const struct dev_pm_ops pcm3168a_pm_ops = { 909 SET_RUNTIME_PM_OPS(pcm3168a_rt_suspend, pcm3168a_rt_resume, NULL) 910 }; 911 EXPORT_SYMBOL_GPL(pcm3168a_pm_ops); 912 913 MODULE_DESCRIPTION("PCM3168A codec driver"); 914 MODULE_AUTHOR("Damien Horsley <Damien.Horsley@imgtec.com>"); 915 MODULE_LICENSE("GPL v2"); 916