1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * cs4265.c -- CS4265 ALSA SoC audio driver 4 * 5 * Copyright 2014 Cirrus Logic, Inc. 6 * 7 * Author: Paul Handrigan <paul.handrigan@cirrus.com> 8 */ 9 10 #include <linux/module.h> 11 #include <linux/moduleparam.h> 12 #include <linux/kernel.h> 13 #include <linux/gpio/consumer.h> 14 #include <linux/init.h> 15 #include <linux/delay.h> 16 #include <linux/i2c.h> 17 #include <linux/input.h> 18 #include <linux/regmap.h> 19 #include <linux/slab.h> 20 #include <linux/platform_device.h> 21 #include <sound/core.h> 22 #include <sound/pcm.h> 23 #include <sound/pcm_params.h> 24 #include <sound/soc.h> 25 #include <sound/soc-dapm.h> 26 #include <sound/initval.h> 27 #include <sound/tlv.h> 28 #include "cs4265.h" 29 30 struct cs4265_private { 31 struct regmap *regmap; 32 struct gpio_desc *reset_gpio; 33 u8 format; 34 u32 sysclk; 35 }; 36 37 static const struct reg_default cs4265_reg_defaults[] = { 38 { CS4265_PWRCTL, 0x0F }, 39 { CS4265_DAC_CTL, 0x08 }, 40 { CS4265_ADC_CTL, 0x00 }, 41 { CS4265_MCLK_FREQ, 0x00 }, 42 { CS4265_SIG_SEL, 0x40 }, 43 { CS4265_CHB_PGA_CTL, 0x00 }, 44 { CS4265_CHA_PGA_CTL, 0x00 }, 45 { CS4265_ADC_CTL2, 0x19 }, 46 { CS4265_DAC_CHA_VOL, 0x00 }, 47 { CS4265_DAC_CHB_VOL, 0x00 }, 48 { CS4265_DAC_CTL2, 0xC0 }, 49 { CS4265_SPDIF_CTL1, 0x00 }, 50 { CS4265_SPDIF_CTL2, 0x00 }, 51 { CS4265_INT_MASK, 0x00 }, 52 { CS4265_STATUS_MODE_MSB, 0x00 }, 53 { CS4265_STATUS_MODE_LSB, 0x00 }, 54 }; 55 56 static bool cs4265_readable_register(struct device *dev, unsigned int reg) 57 { 58 switch (reg) { 59 case CS4265_CHIP_ID ... CS4265_MAX_REGISTER: 60 return true; 61 default: 62 return false; 63 } 64 } 65 66 static bool cs4265_volatile_register(struct device *dev, unsigned int reg) 67 { 68 switch (reg) { 69 case CS4265_INT_STATUS: 70 return true; 71 default: 72 return false; 73 } 74 } 75 76 static DECLARE_TLV_DB_SCALE(pga_tlv, -1200, 50, 0); 77 78 static DECLARE_TLV_DB_SCALE(dac_tlv, -12750, 50, 0); 79 80 static const char * const digital_input_mux_text[] = { 81 "SDIN1", "SDIN2" 82 }; 83 84 static SOC_ENUM_SINGLE_DECL(digital_input_mux_enum, CS4265_SIG_SEL, 7, 85 digital_input_mux_text); 86 87 static const struct snd_kcontrol_new digital_input_mux = 88 SOC_DAPM_ENUM("Digital Input Mux", digital_input_mux_enum); 89 90 static const char * const mic_linein_text[] = { 91 "MIC", "LINEIN" 92 }; 93 94 static SOC_ENUM_SINGLE_DECL(mic_linein_enum, CS4265_ADC_CTL2, 0, 95 mic_linein_text); 96 97 static const char * const cam_mode_text[] = { 98 "One Byte", "Two Byte" 99 }; 100 101 static SOC_ENUM_SINGLE_DECL(cam_mode_enum, CS4265_SPDIF_CTL1, 5, 102 cam_mode_text); 103 104 static const char * const cam_mono_stereo_text[] = { 105 "Stereo", "Mono" 106 }; 107 108 static SOC_ENUM_SINGLE_DECL(spdif_mono_stereo_enum, CS4265_SPDIF_CTL2, 2, 109 cam_mono_stereo_text); 110 111 static const char * const mono_select_text[] = { 112 "Channel A", "Channel B" 113 }; 114 115 static SOC_ENUM_SINGLE_DECL(spdif_mono_select_enum, CS4265_SPDIF_CTL2, 0, 116 mono_select_text); 117 118 static const struct snd_kcontrol_new mic_linein_mux = 119 SOC_DAPM_ENUM("ADC Input Capture Mux", mic_linein_enum); 120 121 static const struct snd_kcontrol_new loopback_ctl = 122 SOC_DAPM_SINGLE("Switch", CS4265_SIG_SEL, 1, 1, 0); 123 124 static const struct snd_kcontrol_new spdif_switch = 125 SOC_DAPM_SINGLE("Switch", SND_SOC_NOPM, 0, 0, 0); 126 127 static const struct snd_kcontrol_new dac_switch = 128 SOC_DAPM_SINGLE("Switch", CS4265_PWRCTL, 1, 1, 0); 129 130 static const struct snd_kcontrol_new cs4265_snd_controls[] = { 131 132 SOC_DOUBLE_R_SX_TLV("PGA Volume", CS4265_CHA_PGA_CTL, 133 CS4265_CHB_PGA_CTL, 0, 0x28, 0x30, pga_tlv), 134 SOC_DOUBLE_R_TLV("DAC Volume", CS4265_DAC_CHA_VOL, 135 CS4265_DAC_CHB_VOL, 0, 0xFF, 1, dac_tlv), 136 SOC_SINGLE("De-emp 44.1kHz Switch", CS4265_DAC_CTL, 1, 137 1, 0), 138 SOC_SINGLE("DAC INV Switch", CS4265_DAC_CTL2, 5, 139 1, 0), 140 SOC_SINGLE("DAC Zero Cross Switch", CS4265_DAC_CTL2, 6, 141 1, 0), 142 SOC_SINGLE("DAC Soft Ramp Switch", CS4265_DAC_CTL2, 7, 143 1, 0), 144 SOC_SINGLE("ADC HPF Switch", CS4265_ADC_CTL, 1, 145 1, 0), 146 SOC_SINGLE("ADC Zero Cross Switch", CS4265_ADC_CTL2, 3, 147 1, 1), 148 SOC_SINGLE("ADC Soft Ramp Switch", CS4265_ADC_CTL2, 7, 149 1, 0), 150 SOC_SINGLE("E to F Buffer Disable Switch", CS4265_SPDIF_CTL1, 151 6, 1, 0), 152 SOC_ENUM("C Data Access", cam_mode_enum), 153 SOC_SINGLE("Validity Bit Control Switch", CS4265_SPDIF_CTL2, 154 3, 1, 0), 155 SOC_ENUM("SPDIF Mono/Stereo", spdif_mono_stereo_enum), 156 SOC_SINGLE("MMTLR Data Switch", CS4265_SPDIF_CTL2, 0, 1, 0), 157 SOC_ENUM("Mono Channel Select", spdif_mono_select_enum), 158 SND_SOC_BYTES("C Data Buffer", CS4265_C_DATA_BUFF, 24), 159 }; 160 161 static const struct snd_soc_dapm_widget cs4265_dapm_widgets[] = { 162 163 SND_SOC_DAPM_INPUT("LINEINL"), 164 SND_SOC_DAPM_INPUT("LINEINR"), 165 SND_SOC_DAPM_INPUT("MICL"), 166 SND_SOC_DAPM_INPUT("MICR"), 167 168 SND_SOC_DAPM_AIF_OUT("DOUT", NULL, 0, 169 SND_SOC_NOPM, 0, 0), 170 SND_SOC_DAPM_AIF_OUT("SPDIFOUT", NULL, 0, 171 SND_SOC_NOPM, 0, 0), 172 173 SND_SOC_DAPM_MUX("ADC Mux", SND_SOC_NOPM, 0, 0, &mic_linein_mux), 174 175 SND_SOC_DAPM_ADC("ADC", NULL, CS4265_PWRCTL, 2, 1), 176 SND_SOC_DAPM_PGA("Pre-amp MIC", CS4265_PWRCTL, 3, 177 1, NULL, 0), 178 179 SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 180 0, 0, &digital_input_mux), 181 182 SND_SOC_DAPM_MIXER("SDIN1 Input Mixer", SND_SOC_NOPM, 0, 0, NULL, 0), 183 SND_SOC_DAPM_MIXER("SDIN2 Input Mixer", SND_SOC_NOPM, 0, 0, NULL, 0), 184 SND_SOC_DAPM_MIXER("SPDIF Transmitter", SND_SOC_NOPM, 0, 0, NULL, 0), 185 186 SND_SOC_DAPM_SWITCH("Loopback", SND_SOC_NOPM, 0, 0, 187 &loopback_ctl), 188 SND_SOC_DAPM_SWITCH("SPDIF", CS4265_SPDIF_CTL2, 5, 1, 189 &spdif_switch), 190 SND_SOC_DAPM_SWITCH("DAC", CS4265_PWRCTL, 1, 1, 191 &dac_switch), 192 193 SND_SOC_DAPM_AIF_IN("DIN1", NULL, 0, 194 SND_SOC_NOPM, 0, 0), 195 SND_SOC_DAPM_AIF_IN("DIN2", NULL, 0, 196 SND_SOC_NOPM, 0, 0), 197 SND_SOC_DAPM_AIF_IN("TXIN", NULL, 0, 198 CS4265_SPDIF_CTL2, 5, 1), 199 200 SND_SOC_DAPM_OUTPUT("LINEOUTL"), 201 SND_SOC_DAPM_OUTPUT("LINEOUTR"), 202 203 }; 204 205 static const struct snd_soc_dapm_route cs4265_audio_map[] = { 206 207 {"DIN1", NULL, "DAI1 Playback"}, 208 {"DIN2", NULL, "DAI2 Playback"}, 209 {"SDIN1 Input Mixer", NULL, "DIN1"}, 210 {"SDIN2 Input Mixer", NULL, "DIN2"}, 211 {"Input Mux", "SDIN1", "SDIN1 Input Mixer"}, 212 {"Input Mux", "SDIN2", "SDIN2 Input Mixer"}, 213 {"DAC", "Switch", "Input Mux"}, 214 {"SPDIF", "Switch", "Input Mux"}, 215 {"LINEOUTL", NULL, "DAC"}, 216 {"LINEOUTR", NULL, "DAC"}, 217 {"SPDIFOUT", NULL, "SPDIF"}, 218 219 {"Pre-amp MIC", NULL, "MICL"}, 220 {"Pre-amp MIC", NULL, "MICR"}, 221 {"ADC Mux", "MIC", "Pre-amp MIC"}, 222 {"ADC Mux", "LINEIN", "LINEINL"}, 223 {"ADC Mux", "LINEIN", "LINEINR"}, 224 {"ADC", NULL, "ADC Mux"}, 225 {"DOUT", NULL, "ADC"}, 226 {"DAI1 Capture", NULL, "DOUT"}, 227 {"DAI2 Capture", NULL, "DOUT"}, 228 229 /* Loopback */ 230 {"Loopback", "Switch", "ADC"}, 231 {"DAC", NULL, "Loopback"}, 232 }; 233 234 struct cs4265_clk_para { 235 u32 mclk; 236 u32 rate; 237 u8 fm_mode; /* values 1, 2, or 4 */ 238 u8 mclkdiv; 239 }; 240 241 static const struct cs4265_clk_para clk_map_table[] = { 242 /*32k*/ 243 {8192000, 32000, 0, 0}, 244 {12288000, 32000, 0, 1}, 245 {16384000, 32000, 0, 2}, 246 {24576000, 32000, 0, 3}, 247 {32768000, 32000, 0, 4}, 248 249 /*44.1k*/ 250 {11289600, 44100, 0, 0}, 251 {16934400, 44100, 0, 1}, 252 {22579200, 44100, 0, 2}, 253 {33868000, 44100, 0, 3}, 254 {45158400, 44100, 0, 4}, 255 256 /*48k*/ 257 {12288000, 48000, 0, 0}, 258 {18432000, 48000, 0, 1}, 259 {24576000, 48000, 0, 2}, 260 {36864000, 48000, 0, 3}, 261 {49152000, 48000, 0, 4}, 262 263 /*64k*/ 264 {8192000, 64000, 1, 0}, 265 {12288000, 64000, 1, 1}, 266 {16934400, 64000, 1, 2}, 267 {24576000, 64000, 1, 3}, 268 {32768000, 64000, 1, 4}, 269 270 /* 88.2k */ 271 {11289600, 88200, 1, 0}, 272 {16934400, 88200, 1, 1}, 273 {22579200, 88200, 1, 2}, 274 {33868000, 88200, 1, 3}, 275 {45158400, 88200, 1, 4}, 276 277 /* 96k */ 278 {12288000, 96000, 1, 0}, 279 {18432000, 96000, 1, 1}, 280 {24576000, 96000, 1, 2}, 281 {36864000, 96000, 1, 3}, 282 {49152000, 96000, 1, 4}, 283 284 /* 128k */ 285 {8192000, 128000, 2, 0}, 286 {12288000, 128000, 2, 1}, 287 {16934400, 128000, 2, 2}, 288 {24576000, 128000, 2, 3}, 289 {32768000, 128000, 2, 4}, 290 291 /* 176.4k */ 292 {11289600, 176400, 2, 0}, 293 {16934400, 176400, 2, 1}, 294 {22579200, 176400, 2, 2}, 295 {33868000, 176400, 2, 3}, 296 {49152000, 176400, 2, 4}, 297 298 /* 192k */ 299 {12288000, 192000, 2, 0}, 300 {18432000, 192000, 2, 1}, 301 {24576000, 192000, 2, 2}, 302 {36864000, 192000, 2, 3}, 303 {49152000, 192000, 2, 4}, 304 }; 305 306 static int cs4265_get_clk_index(int mclk, int rate) 307 { 308 int i; 309 310 for (i = 0; i < ARRAY_SIZE(clk_map_table); i++) { 311 if (clk_map_table[i].rate == rate && 312 clk_map_table[i].mclk == mclk) 313 return i; 314 } 315 return -EINVAL; 316 } 317 318 static int cs4265_set_sysclk(struct snd_soc_dai *codec_dai, int clk_id, 319 unsigned int freq, int dir) 320 { 321 struct snd_soc_component *component = codec_dai->component; 322 struct cs4265_private *cs4265 = snd_soc_component_get_drvdata(component); 323 int i; 324 325 if (clk_id != 0) { 326 dev_err(component->dev, "Invalid clk_id %d\n", clk_id); 327 return -EINVAL; 328 } 329 for (i = 0; i < ARRAY_SIZE(clk_map_table); i++) { 330 if (clk_map_table[i].mclk == freq) { 331 cs4265->sysclk = freq; 332 return 0; 333 } 334 } 335 cs4265->sysclk = 0; 336 dev_err(component->dev, "Invalid freq parameter %d\n", freq); 337 return -EINVAL; 338 } 339 340 static int cs4265_set_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt) 341 { 342 struct snd_soc_component *component = codec_dai->component; 343 struct cs4265_private *cs4265 = snd_soc_component_get_drvdata(component); 344 u8 iface = 0; 345 346 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 347 case SND_SOC_DAIFMT_CBM_CFM: 348 snd_soc_component_update_bits(component, CS4265_ADC_CTL, 349 CS4265_ADC_MASTER, 350 CS4265_ADC_MASTER); 351 break; 352 case SND_SOC_DAIFMT_CBS_CFS: 353 snd_soc_component_update_bits(component, CS4265_ADC_CTL, 354 CS4265_ADC_MASTER, 355 0); 356 break; 357 default: 358 return -EINVAL; 359 } 360 361 /* interface format */ 362 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 363 case SND_SOC_DAIFMT_I2S: 364 iface |= SND_SOC_DAIFMT_I2S; 365 break; 366 case SND_SOC_DAIFMT_RIGHT_J: 367 iface |= SND_SOC_DAIFMT_RIGHT_J; 368 break; 369 case SND_SOC_DAIFMT_LEFT_J: 370 iface |= SND_SOC_DAIFMT_LEFT_J; 371 break; 372 default: 373 return -EINVAL; 374 } 375 376 cs4265->format = iface; 377 return 0; 378 } 379 380 static int cs4265_mute(struct snd_soc_dai *dai, int mute, int direction) 381 { 382 struct snd_soc_component *component = dai->component; 383 384 if (mute) { 385 snd_soc_component_update_bits(component, CS4265_DAC_CTL, 386 CS4265_DAC_CTL_MUTE, 387 CS4265_DAC_CTL_MUTE); 388 snd_soc_component_update_bits(component, CS4265_SPDIF_CTL2, 389 CS4265_SPDIF_CTL2_MUTE, 390 CS4265_SPDIF_CTL2_MUTE); 391 } else { 392 snd_soc_component_update_bits(component, CS4265_DAC_CTL, 393 CS4265_DAC_CTL_MUTE, 394 0); 395 snd_soc_component_update_bits(component, CS4265_SPDIF_CTL2, 396 CS4265_SPDIF_CTL2_MUTE, 397 0); 398 } 399 return 0; 400 } 401 402 static int cs4265_pcm_hw_params(struct snd_pcm_substream *substream, 403 struct snd_pcm_hw_params *params, 404 struct snd_soc_dai *dai) 405 { 406 struct snd_soc_component *component = dai->component; 407 struct cs4265_private *cs4265 = snd_soc_component_get_drvdata(component); 408 int index; 409 410 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE && 411 ((cs4265->format & SND_SOC_DAIFMT_FORMAT_MASK) 412 == SND_SOC_DAIFMT_RIGHT_J)) 413 return -EINVAL; 414 415 index = cs4265_get_clk_index(cs4265->sysclk, params_rate(params)); 416 if (index >= 0) { 417 snd_soc_component_update_bits(component, CS4265_ADC_CTL, 418 CS4265_ADC_FM, clk_map_table[index].fm_mode << 6); 419 snd_soc_component_update_bits(component, CS4265_MCLK_FREQ, 420 CS4265_MCLK_FREQ_MASK, 421 clk_map_table[index].mclkdiv << 4); 422 423 } else { 424 dev_err(component->dev, "can't get correct mclk\n"); 425 return -EINVAL; 426 } 427 428 switch (cs4265->format & SND_SOC_DAIFMT_FORMAT_MASK) { 429 case SND_SOC_DAIFMT_I2S: 430 snd_soc_component_update_bits(component, CS4265_DAC_CTL, 431 CS4265_DAC_CTL_DIF, (1 << 4)); 432 snd_soc_component_update_bits(component, CS4265_ADC_CTL, 433 CS4265_ADC_DIF, (1 << 4)); 434 snd_soc_component_update_bits(component, CS4265_SPDIF_CTL2, 435 CS4265_SPDIF_CTL2_DIF, (1 << 6)); 436 break; 437 case SND_SOC_DAIFMT_RIGHT_J: 438 if (params_width(params) == 16) { 439 snd_soc_component_update_bits(component, CS4265_DAC_CTL, 440 CS4265_DAC_CTL_DIF, (2 << 4)); 441 snd_soc_component_update_bits(component, CS4265_SPDIF_CTL2, 442 CS4265_SPDIF_CTL2_DIF, (2 << 6)); 443 } else { 444 snd_soc_component_update_bits(component, CS4265_DAC_CTL, 445 CS4265_DAC_CTL_DIF, (3 << 4)); 446 snd_soc_component_update_bits(component, CS4265_SPDIF_CTL2, 447 CS4265_SPDIF_CTL2_DIF, (3 << 6)); 448 } 449 break; 450 case SND_SOC_DAIFMT_LEFT_J: 451 snd_soc_component_update_bits(component, CS4265_DAC_CTL, 452 CS4265_DAC_CTL_DIF, 0); 453 snd_soc_component_update_bits(component, CS4265_ADC_CTL, 454 CS4265_ADC_DIF, 0); 455 snd_soc_component_update_bits(component, CS4265_SPDIF_CTL2, 456 CS4265_SPDIF_CTL2_DIF, 0); 457 458 break; 459 default: 460 return -EINVAL; 461 } 462 return 0; 463 } 464 465 static int cs4265_set_bias_level(struct snd_soc_component *component, 466 enum snd_soc_bias_level level) 467 { 468 switch (level) { 469 case SND_SOC_BIAS_ON: 470 break; 471 case SND_SOC_BIAS_PREPARE: 472 snd_soc_component_update_bits(component, CS4265_PWRCTL, 473 CS4265_PWRCTL_PDN, 0); 474 break; 475 case SND_SOC_BIAS_STANDBY: 476 snd_soc_component_update_bits(component, CS4265_PWRCTL, 477 CS4265_PWRCTL_PDN, 478 CS4265_PWRCTL_PDN); 479 break; 480 case SND_SOC_BIAS_OFF: 481 snd_soc_component_update_bits(component, CS4265_PWRCTL, 482 CS4265_PWRCTL_PDN, 483 CS4265_PWRCTL_PDN); 484 break; 485 } 486 return 0; 487 } 488 489 #define CS4265_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \ 490 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_64000 | \ 491 SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 | \ 492 SNDRV_PCM_RATE_176400 | SNDRV_PCM_RATE_192000) 493 494 #define CS4265_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE | \ 495 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_U24_LE | \ 496 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_U32_LE) 497 498 static const struct snd_soc_dai_ops cs4265_ops = { 499 .hw_params = cs4265_pcm_hw_params, 500 .mute_stream = cs4265_mute, 501 .set_fmt = cs4265_set_fmt, 502 .set_sysclk = cs4265_set_sysclk, 503 .no_capture_mute = 1, 504 }; 505 506 static struct snd_soc_dai_driver cs4265_dai[] = { 507 { 508 .name = "cs4265-dai1", 509 .playback = { 510 .stream_name = "DAI1 Playback", 511 .channels_min = 1, 512 .channels_max = 2, 513 .rates = CS4265_RATES, 514 .formats = CS4265_FORMATS, 515 }, 516 .capture = { 517 .stream_name = "DAI1 Capture", 518 .channels_min = 1, 519 .channels_max = 2, 520 .rates = CS4265_RATES, 521 .formats = CS4265_FORMATS, 522 }, 523 .ops = &cs4265_ops, 524 }, 525 { 526 .name = "cs4265-dai2", 527 .playback = { 528 .stream_name = "DAI2 Playback", 529 .channels_min = 1, 530 .channels_max = 2, 531 .rates = CS4265_RATES, 532 .formats = CS4265_FORMATS, 533 }, 534 .capture = { 535 .stream_name = "DAI2 Capture", 536 .channels_min = 1, 537 .channels_max = 2, 538 .rates = CS4265_RATES, 539 .formats = CS4265_FORMATS, 540 }, 541 .ops = &cs4265_ops, 542 }, 543 }; 544 545 static const struct snd_soc_component_driver soc_component_cs4265 = { 546 .set_bias_level = cs4265_set_bias_level, 547 .controls = cs4265_snd_controls, 548 .num_controls = ARRAY_SIZE(cs4265_snd_controls), 549 .dapm_widgets = cs4265_dapm_widgets, 550 .num_dapm_widgets = ARRAY_SIZE(cs4265_dapm_widgets), 551 .dapm_routes = cs4265_audio_map, 552 .num_dapm_routes = ARRAY_SIZE(cs4265_audio_map), 553 .idle_bias_on = 1, 554 .use_pmdown_time = 1, 555 .endianness = 1, 556 }; 557 558 static const struct regmap_config cs4265_regmap = { 559 .reg_bits = 8, 560 .val_bits = 8, 561 562 .max_register = CS4265_MAX_REGISTER, 563 .reg_defaults = cs4265_reg_defaults, 564 .num_reg_defaults = ARRAY_SIZE(cs4265_reg_defaults), 565 .readable_reg = cs4265_readable_register, 566 .volatile_reg = cs4265_volatile_register, 567 .cache_type = REGCACHE_RBTREE, 568 }; 569 570 static int cs4265_i2c_probe(struct i2c_client *i2c_client) 571 { 572 struct cs4265_private *cs4265; 573 int ret; 574 unsigned int devid = 0; 575 unsigned int reg; 576 577 cs4265 = devm_kzalloc(&i2c_client->dev, sizeof(struct cs4265_private), 578 GFP_KERNEL); 579 if (cs4265 == NULL) 580 return -ENOMEM; 581 582 cs4265->regmap = devm_regmap_init_i2c(i2c_client, &cs4265_regmap); 583 if (IS_ERR(cs4265->regmap)) { 584 ret = PTR_ERR(cs4265->regmap); 585 dev_err(&i2c_client->dev, "regmap_init() failed: %d\n", ret); 586 return ret; 587 } 588 589 cs4265->reset_gpio = devm_gpiod_get_optional(&i2c_client->dev, 590 "reset", GPIOD_OUT_LOW); 591 if (IS_ERR(cs4265->reset_gpio)) 592 return PTR_ERR(cs4265->reset_gpio); 593 594 if (cs4265->reset_gpio) { 595 mdelay(1); 596 gpiod_set_value_cansleep(cs4265->reset_gpio, 1); 597 } 598 599 i2c_set_clientdata(i2c_client, cs4265); 600 601 ret = regmap_read(cs4265->regmap, CS4265_CHIP_ID, ®); 602 if (ret) { 603 dev_err(&i2c_client->dev, "Failed to read chip ID: %d\n", ret); 604 return ret; 605 } 606 607 devid = reg & CS4265_CHIP_ID_MASK; 608 if (devid != CS4265_CHIP_ID_VAL) { 609 ret = -ENODEV; 610 dev_err(&i2c_client->dev, 611 "CS4265 Part Number ID: 0x%x Expected: 0x%x\n", 612 devid >> 4, CS4265_CHIP_ID_VAL >> 4); 613 return ret; 614 } 615 dev_info(&i2c_client->dev, 616 "CS4265 Version %x\n", 617 reg & CS4265_REV_ID_MASK); 618 619 regmap_write(cs4265->regmap, CS4265_PWRCTL, 0x0F); 620 621 return devm_snd_soc_register_component(&i2c_client->dev, 622 &soc_component_cs4265, cs4265_dai, 623 ARRAY_SIZE(cs4265_dai)); 624 } 625 626 static void cs4265_i2c_remove(struct i2c_client *i2c) 627 { 628 struct cs4265_private *cs4265 = i2c_get_clientdata(i2c); 629 630 if (cs4265->reset_gpio) 631 gpiod_set_value_cansleep(cs4265->reset_gpio, 0); 632 } 633 634 static const struct of_device_id cs4265_of_match[] = { 635 { .compatible = "cirrus,cs4265", }, 636 { } 637 }; 638 MODULE_DEVICE_TABLE(of, cs4265_of_match); 639 640 static const struct i2c_device_id cs4265_id[] = { 641 { "cs4265", 0 }, 642 { } 643 }; 644 MODULE_DEVICE_TABLE(i2c, cs4265_id); 645 646 static struct i2c_driver cs4265_i2c_driver = { 647 .driver = { 648 .name = "cs4265", 649 .of_match_table = cs4265_of_match, 650 }, 651 .id_table = cs4265_id, 652 .probe = cs4265_i2c_probe, 653 .remove = cs4265_i2c_remove, 654 }; 655 656 module_i2c_driver(cs4265_i2c_driver); 657 658 MODULE_DESCRIPTION("ASoC CS4265 driver"); 659 MODULE_AUTHOR("Paul Handrigan, Cirrus Logic Inc, <paul.handrigan@cirrus.com>"); 660 MODULE_LICENSE("GPL"); 661