1 // SPDX-License-Identifier: GPL-2.0 2 // 3 // ALSA SoC Texas Instruments TAS2770 20-W Digital Input Mono Class-D 4 // Audio Amplifier with Speaker I/V Sense 5 // 6 // Copyright (C) 2016-2017 Texas Instruments Incorporated - https://www.ti.com/ 7 // Author: Tracy Yi <tracy-yi@ti.com> 8 // Frank Shi <shifu0704@thundersoft.com> 9 10 #include <linux/module.h> 11 #include <linux/moduleparam.h> 12 #include <linux/err.h> 13 #include <linux/init.h> 14 #include <linux/delay.h> 15 #include <linux/pm.h> 16 #include <linux/i2c.h> 17 #include <linux/gpio/consumer.h> 18 #include <linux/regulator/consumer.h> 19 #include <linux/firmware.h> 20 #include <linux/regmap.h> 21 #include <linux/of.h> 22 #include <linux/slab.h> 23 #include <sound/soc.h> 24 #include <sound/pcm.h> 25 #include <sound/pcm_params.h> 26 #include <sound/initval.h> 27 #include <sound/tlv.h> 28 29 #include "tas2770.h" 30 31 #define TAS2770_MDELAY 0xFFFFFFFE 32 33 static void tas2770_reset(struct tas2770_priv *tas2770) 34 { 35 if (tas2770->reset_gpio) { 36 gpiod_set_value_cansleep(tas2770->reset_gpio, 0); 37 msleep(20); 38 gpiod_set_value_cansleep(tas2770->reset_gpio, 1); 39 usleep_range(1000, 2000); 40 } 41 42 snd_soc_component_write(tas2770->component, TAS2770_SW_RST, 43 TAS2770_RST); 44 usleep_range(1000, 2000); 45 } 46 47 static int tas2770_update_pwr_ctrl(struct tas2770_priv *tas2770) 48 { 49 struct snd_soc_component *component = tas2770->component; 50 unsigned int val; 51 int ret; 52 53 if (tas2770->dac_powered) 54 val = tas2770->unmuted ? 55 TAS2770_PWR_CTRL_ACTIVE : TAS2770_PWR_CTRL_MUTE; 56 else 57 val = TAS2770_PWR_CTRL_SHUTDOWN; 58 59 ret = snd_soc_component_update_bits(component, TAS2770_PWR_CTRL, 60 TAS2770_PWR_CTRL_MASK, val); 61 if (ret < 0) 62 return ret; 63 64 return 0; 65 } 66 67 #ifdef CONFIG_PM 68 static int tas2770_codec_suspend(struct snd_soc_component *component) 69 { 70 struct tas2770_priv *tas2770 = snd_soc_component_get_drvdata(component); 71 int ret = 0; 72 73 regcache_cache_only(tas2770->regmap, true); 74 regcache_mark_dirty(tas2770->regmap); 75 76 if (tas2770->sdz_gpio) { 77 gpiod_set_value_cansleep(tas2770->sdz_gpio, 0); 78 } else { 79 ret = snd_soc_component_update_bits(component, TAS2770_PWR_CTRL, 80 TAS2770_PWR_CTRL_MASK, 81 TAS2770_PWR_CTRL_SHUTDOWN); 82 if (ret < 0) { 83 regcache_cache_only(tas2770->regmap, false); 84 regcache_sync(tas2770->regmap); 85 return ret; 86 } 87 88 ret = 0; 89 } 90 91 return ret; 92 } 93 94 static int tas2770_codec_resume(struct snd_soc_component *component) 95 { 96 struct tas2770_priv *tas2770 = snd_soc_component_get_drvdata(component); 97 int ret; 98 99 if (tas2770->sdz_gpio) { 100 gpiod_set_value_cansleep(tas2770->sdz_gpio, 1); 101 usleep_range(1000, 2000); 102 } else { 103 ret = tas2770_update_pwr_ctrl(tas2770); 104 if (ret < 0) 105 return ret; 106 } 107 108 regcache_cache_only(tas2770->regmap, false); 109 110 return regcache_sync(tas2770->regmap); 111 } 112 #else 113 #define tas2770_codec_suspend NULL 114 #define tas2770_codec_resume NULL 115 #endif 116 117 static const char * const tas2770_ASI1_src[] = { 118 "I2C offset", "Left", "Right", "LeftRightDiv2", 119 }; 120 121 static SOC_ENUM_SINGLE_DECL( 122 tas2770_ASI1_src_enum, TAS2770_TDM_CFG_REG2, 123 4, tas2770_ASI1_src); 124 125 static const struct snd_kcontrol_new tas2770_asi1_mux = 126 SOC_DAPM_ENUM("ASI1 Source", tas2770_ASI1_src_enum); 127 128 static int tas2770_dac_event(struct snd_soc_dapm_widget *w, 129 struct snd_kcontrol *kcontrol, int event) 130 { 131 struct snd_soc_component *component = 132 snd_soc_dapm_to_component(w->dapm); 133 struct tas2770_priv *tas2770 = 134 snd_soc_component_get_drvdata(component); 135 int ret; 136 137 switch (event) { 138 case SND_SOC_DAPM_POST_PMU: 139 tas2770->dac_powered = 1; 140 ret = tas2770_update_pwr_ctrl(tas2770); 141 break; 142 case SND_SOC_DAPM_PRE_PMD: 143 tas2770->dac_powered = 0; 144 ret = tas2770_update_pwr_ctrl(tas2770); 145 break; 146 default: 147 dev_err(tas2770->dev, "Not supported evevt\n"); 148 return -EINVAL; 149 } 150 151 return ret; 152 } 153 154 static const struct snd_kcontrol_new isense_switch = 155 SOC_DAPM_SINGLE("Switch", TAS2770_PWR_CTRL, 3, 1, 1); 156 static const struct snd_kcontrol_new vsense_switch = 157 SOC_DAPM_SINGLE("Switch", TAS2770_PWR_CTRL, 2, 1, 1); 158 159 static const struct snd_soc_dapm_widget tas2770_dapm_widgets[] = { 160 SND_SOC_DAPM_AIF_IN("ASI1", "ASI1 Playback", 0, SND_SOC_NOPM, 0, 0), 161 SND_SOC_DAPM_MUX("ASI1 Sel", SND_SOC_NOPM, 0, 0, &tas2770_asi1_mux), 162 SND_SOC_DAPM_SWITCH("ISENSE", TAS2770_PWR_CTRL, 3, 1, &isense_switch), 163 SND_SOC_DAPM_SWITCH("VSENSE", TAS2770_PWR_CTRL, 2, 1, &vsense_switch), 164 SND_SOC_DAPM_DAC_E("DAC", NULL, SND_SOC_NOPM, 0, 0, tas2770_dac_event, 165 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD), 166 SND_SOC_DAPM_OUTPUT("OUT"), 167 SND_SOC_DAPM_SIGGEN("VMON"), 168 SND_SOC_DAPM_SIGGEN("IMON") 169 }; 170 171 static const struct snd_soc_dapm_route tas2770_audio_map[] = { 172 {"ASI1 Sel", "I2C offset", "ASI1"}, 173 {"ASI1 Sel", "Left", "ASI1"}, 174 {"ASI1 Sel", "Right", "ASI1"}, 175 {"ASI1 Sel", "LeftRightDiv2", "ASI1"}, 176 {"DAC", NULL, "ASI1 Sel"}, 177 {"OUT", NULL, "DAC"}, 178 {"ISENSE", "Switch", "IMON"}, 179 {"VSENSE", "Switch", "VMON"}, 180 }; 181 182 static int tas2770_mute(struct snd_soc_dai *dai, int mute, int direction) 183 { 184 struct snd_soc_component *component = dai->component; 185 struct tas2770_priv *tas2770 = 186 snd_soc_component_get_drvdata(component); 187 188 tas2770->unmuted = !mute; 189 return tas2770_update_pwr_ctrl(tas2770); 190 } 191 192 static int tas2770_set_ivsense_transmit(struct tas2770_priv *tas2770, 193 int i_slot, int v_slot) 194 { 195 struct snd_soc_component *component = tas2770->component; 196 int ret; 197 198 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG5, 199 TAS2770_TDM_CFG_REG5_VSNS_MASK | 200 TAS2770_TDM_CFG_REG5_50_MASK, 201 TAS2770_TDM_CFG_REG5_VSNS_ENABLE | 202 v_slot); 203 if (ret < 0) 204 return ret; 205 206 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG6, 207 TAS2770_TDM_CFG_REG6_ISNS_MASK | 208 TAS2770_TDM_CFG_REG6_50_MASK, 209 TAS2770_TDM_CFG_REG6_ISNS_ENABLE | 210 i_slot); 211 if (ret < 0) 212 return ret; 213 214 return 0; 215 } 216 217 static int tas2770_set_bitwidth(struct tas2770_priv *tas2770, int bitwidth) 218 { 219 int ret; 220 struct snd_soc_component *component = tas2770->component; 221 222 switch (bitwidth) { 223 case SNDRV_PCM_FORMAT_S16_LE: 224 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2, 225 TAS2770_TDM_CFG_REG2_RXW_MASK, 226 TAS2770_TDM_CFG_REG2_RXW_16BITS); 227 break; 228 case SNDRV_PCM_FORMAT_S24_LE: 229 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2, 230 TAS2770_TDM_CFG_REG2_RXW_MASK, 231 TAS2770_TDM_CFG_REG2_RXW_24BITS); 232 break; 233 case SNDRV_PCM_FORMAT_S32_LE: 234 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2, 235 TAS2770_TDM_CFG_REG2_RXW_MASK, 236 TAS2770_TDM_CFG_REG2_RXW_32BITS); 237 break; 238 239 default: 240 return -EINVAL; 241 } 242 243 if (ret < 0) 244 return ret; 245 246 return 0; 247 } 248 249 static int tas2770_set_samplerate(struct tas2770_priv *tas2770, int samplerate) 250 { 251 struct snd_soc_component *component = tas2770->component; 252 int ramp_rate_val; 253 int ret; 254 255 switch (samplerate) { 256 case 48000: 257 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_48KHZ | 258 TAS2770_TDM_CFG_REG0_31_44_1_48KHZ; 259 break; 260 case 44100: 261 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_44_1KHZ | 262 TAS2770_TDM_CFG_REG0_31_44_1_48KHZ; 263 break; 264 case 96000: 265 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_48KHZ | 266 TAS2770_TDM_CFG_REG0_31_88_2_96KHZ; 267 break; 268 case 88200: 269 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_44_1KHZ | 270 TAS2770_TDM_CFG_REG0_31_88_2_96KHZ; 271 break; 272 case 192000: 273 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_48KHZ | 274 TAS2770_TDM_CFG_REG0_31_176_4_192KHZ; 275 break; 276 case 176400: 277 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_44_1KHZ | 278 TAS2770_TDM_CFG_REG0_31_176_4_192KHZ; 279 break; 280 default: 281 return -EINVAL; 282 } 283 284 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG0, 285 TAS2770_TDM_CFG_REG0_SMP_MASK | 286 TAS2770_TDM_CFG_REG0_31_MASK, 287 ramp_rate_val); 288 if (ret < 0) 289 return ret; 290 291 return 0; 292 } 293 294 static int tas2770_hw_params(struct snd_pcm_substream *substream, 295 struct snd_pcm_hw_params *params, 296 struct snd_soc_dai *dai) 297 { 298 struct snd_soc_component *component = dai->component; 299 struct tas2770_priv *tas2770 = 300 snd_soc_component_get_drvdata(component); 301 int ret; 302 303 ret = tas2770_set_bitwidth(tas2770, params_format(params)); 304 if (ret) 305 return ret; 306 307 return tas2770_set_samplerate(tas2770, params_rate(params)); 308 } 309 310 static int tas2770_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) 311 { 312 struct snd_soc_component *component = dai->component; 313 struct tas2770_priv *tas2770 = 314 snd_soc_component_get_drvdata(component); 315 u8 tdm_rx_start_slot = 0, invert_fpol = 0, fpol_preinv = 0, asi_cfg_1 = 0; 316 int ret; 317 318 switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) { 319 case SND_SOC_DAIFMT_CBC_CFC: 320 break; 321 default: 322 dev_err(tas2770->dev, "ASI invalid DAI clocking\n"); 323 return -EINVAL; 324 } 325 326 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 327 case SND_SOC_DAIFMT_NB_IF: 328 invert_fpol = 1; 329 fallthrough; 330 case SND_SOC_DAIFMT_NB_NF: 331 asi_cfg_1 |= TAS2770_TDM_CFG_REG1_RX_RSING; 332 break; 333 case SND_SOC_DAIFMT_IB_IF: 334 invert_fpol = 1; 335 fallthrough; 336 case SND_SOC_DAIFMT_IB_NF: 337 asi_cfg_1 |= TAS2770_TDM_CFG_REG1_RX_FALING; 338 break; 339 default: 340 dev_err(tas2770->dev, "ASI format Inverse is not found\n"); 341 return -EINVAL; 342 } 343 344 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG1, 345 TAS2770_TDM_CFG_REG1_RX_MASK, 346 asi_cfg_1); 347 if (ret < 0) 348 return ret; 349 350 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 351 case SND_SOC_DAIFMT_I2S: 352 tdm_rx_start_slot = 1; 353 fpol_preinv = 0; 354 break; 355 case SND_SOC_DAIFMT_DSP_A: 356 tdm_rx_start_slot = 0; 357 fpol_preinv = 1; 358 break; 359 case SND_SOC_DAIFMT_DSP_B: 360 tdm_rx_start_slot = 1; 361 fpol_preinv = 1; 362 break; 363 case SND_SOC_DAIFMT_LEFT_J: 364 tdm_rx_start_slot = 0; 365 fpol_preinv = 1; 366 break; 367 default: 368 dev_err(tas2770->dev, 369 "DAI Format is not found, fmt=0x%x\n", fmt); 370 return -EINVAL; 371 } 372 373 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG1, 374 TAS2770_TDM_CFG_REG1_MASK, 375 (tdm_rx_start_slot << TAS2770_TDM_CFG_REG1_51_SHIFT)); 376 if (ret < 0) 377 return ret; 378 379 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG0, 380 TAS2770_TDM_CFG_REG0_FPOL_MASK, 381 (fpol_preinv ^ invert_fpol) 382 ? TAS2770_TDM_CFG_REG0_FPOL_RSING 383 : TAS2770_TDM_CFG_REG0_FPOL_FALING); 384 if (ret < 0) 385 return ret; 386 387 return 0; 388 } 389 390 static int tas2770_set_dai_tdm_slot(struct snd_soc_dai *dai, 391 unsigned int tx_mask, 392 unsigned int rx_mask, 393 int slots, int slot_width) 394 { 395 struct snd_soc_component *component = dai->component; 396 int left_slot, right_slot; 397 int ret; 398 399 if (tx_mask == 0 || rx_mask != 0) 400 return -EINVAL; 401 402 left_slot = __ffs(tx_mask); 403 tx_mask &= ~(1 << left_slot); 404 if (tx_mask == 0) { 405 right_slot = left_slot; 406 } else { 407 right_slot = __ffs(tx_mask); 408 tx_mask &= ~(1 << right_slot); 409 } 410 411 if (tx_mask != 0 || left_slot >= slots || right_slot >= slots) 412 return -EINVAL; 413 414 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG3, 415 TAS2770_TDM_CFG_REG3_30_MASK, 416 (left_slot << TAS2770_TDM_CFG_REG3_30_SHIFT)); 417 if (ret < 0) 418 return ret; 419 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG3, 420 TAS2770_TDM_CFG_REG3_RXS_MASK, 421 (right_slot << TAS2770_TDM_CFG_REG3_RXS_SHIFT)); 422 if (ret < 0) 423 return ret; 424 425 switch (slot_width) { 426 case 16: 427 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2, 428 TAS2770_TDM_CFG_REG2_RXS_MASK, 429 TAS2770_TDM_CFG_REG2_RXS_16BITS); 430 break; 431 case 24: 432 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2, 433 TAS2770_TDM_CFG_REG2_RXS_MASK, 434 TAS2770_TDM_CFG_REG2_RXS_24BITS); 435 break; 436 case 32: 437 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2, 438 TAS2770_TDM_CFG_REG2_RXS_MASK, 439 TAS2770_TDM_CFG_REG2_RXS_32BITS); 440 break; 441 case 0: 442 /* Do not change slot width */ 443 ret = 0; 444 break; 445 default: 446 ret = -EINVAL; 447 } 448 449 if (ret < 0) 450 return ret; 451 452 return 0; 453 } 454 455 static const struct snd_soc_dai_ops tas2770_dai_ops = { 456 .mute_stream = tas2770_mute, 457 .hw_params = tas2770_hw_params, 458 .set_fmt = tas2770_set_fmt, 459 .set_tdm_slot = tas2770_set_dai_tdm_slot, 460 .no_capture_mute = 1, 461 }; 462 463 #define TAS2770_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ 464 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE) 465 466 #define TAS2770_RATES (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |\ 467 SNDRV_PCM_RATE_96000 |\ 468 SNDRV_PCM_RATE_192000\ 469 ) 470 471 static struct snd_soc_dai_driver tas2770_dai_driver[] = { 472 { 473 .name = "tas2770 ASI1", 474 .id = 0, 475 .playback = { 476 .stream_name = "ASI1 Playback", 477 .channels_min = 1, 478 .channels_max = 2, 479 .rates = TAS2770_RATES, 480 .formats = TAS2770_FORMATS, 481 }, 482 .capture = { 483 .stream_name = "ASI1 Capture", 484 .channels_min = 0, 485 .channels_max = 2, 486 .rates = TAS2770_RATES, 487 .formats = TAS2770_FORMATS, 488 }, 489 .ops = &tas2770_dai_ops, 490 .symmetric_rate = 1, 491 }, 492 }; 493 494 static const struct regmap_config tas2770_i2c_regmap; 495 496 static int tas2770_codec_probe(struct snd_soc_component *component) 497 { 498 struct tas2770_priv *tas2770 = 499 snd_soc_component_get_drvdata(component); 500 int ret; 501 502 tas2770->component = component; 503 504 if (tas2770->sdz_gpio) { 505 gpiod_set_value_cansleep(tas2770->sdz_gpio, 1); 506 usleep_range(1000, 2000); 507 } 508 509 tas2770_reset(tas2770); 510 regmap_reinit_cache(tas2770->regmap, &tas2770_i2c_regmap); 511 512 if (tas2770->i_sense_slot != -1 && tas2770->v_sense_slot != -1) { 513 ret = tas2770_set_ivsense_transmit(tas2770, tas2770->i_sense_slot, 514 tas2770->v_sense_slot); 515 516 if (ret < 0) 517 return ret; 518 } 519 520 return 0; 521 } 522 523 static DECLARE_TLV_DB_SCALE(tas2770_digital_tlv, 1100, 50, 0); 524 static DECLARE_TLV_DB_SCALE(tas2770_playback_volume, -10050, 50, 0); 525 526 static const struct snd_kcontrol_new tas2770_snd_controls[] = { 527 SOC_SINGLE_TLV("Speaker Playback Volume", TAS2770_PLAY_CFG_REG2, 528 0, TAS2770_PLAY_CFG_REG2_VMAX, 1, tas2770_playback_volume), 529 SOC_SINGLE_TLV("Amp Gain Volume", TAS2770_PLAY_CFG_REG0, 0, 0x14, 0, 530 tas2770_digital_tlv), 531 }; 532 533 static const struct snd_soc_component_driver soc_component_driver_tas2770 = { 534 .probe = tas2770_codec_probe, 535 .suspend = tas2770_codec_suspend, 536 .resume = tas2770_codec_resume, 537 .controls = tas2770_snd_controls, 538 .num_controls = ARRAY_SIZE(tas2770_snd_controls), 539 .dapm_widgets = tas2770_dapm_widgets, 540 .num_dapm_widgets = ARRAY_SIZE(tas2770_dapm_widgets), 541 .dapm_routes = tas2770_audio_map, 542 .num_dapm_routes = ARRAY_SIZE(tas2770_audio_map), 543 .idle_bias_on = 1, 544 .endianness = 1, 545 }; 546 547 static int tas2770_register_codec(struct tas2770_priv *tas2770) 548 { 549 return devm_snd_soc_register_component(tas2770->dev, 550 &soc_component_driver_tas2770, 551 tas2770_dai_driver, ARRAY_SIZE(tas2770_dai_driver)); 552 } 553 554 static const struct reg_default tas2770_reg_defaults[] = { 555 { TAS2770_PAGE, 0x00 }, 556 { TAS2770_SW_RST, 0x00 }, 557 { TAS2770_PWR_CTRL, 0x0e }, 558 { TAS2770_PLAY_CFG_REG0, 0x10 }, 559 { TAS2770_PLAY_CFG_REG1, 0x01 }, 560 { TAS2770_PLAY_CFG_REG2, 0x00 }, 561 { TAS2770_MSC_CFG_REG0, 0x07 }, 562 { TAS2770_TDM_CFG_REG1, 0x02 }, 563 { TAS2770_TDM_CFG_REG2, 0x0a }, 564 { TAS2770_TDM_CFG_REG3, 0x10 }, 565 { TAS2770_INT_MASK_REG0, 0xfc }, 566 { TAS2770_INT_MASK_REG1, 0xb1 }, 567 { TAS2770_INT_CFG, 0x05 }, 568 { TAS2770_MISC_IRQ, 0x81 }, 569 { TAS2770_CLK_CGF, 0x0c }, 570 571 }; 572 573 static bool tas2770_volatile(struct device *dev, unsigned int reg) 574 { 575 switch (reg) { 576 case TAS2770_PAGE: /* regmap implementation requires this */ 577 case TAS2770_SW_RST: /* always clears after write */ 578 case TAS2770_BO_PRV_REG0:/* has a self clearing bit */ 579 case TAS2770_LVE_INT_REG0: 580 case TAS2770_LVE_INT_REG1: 581 case TAS2770_LAT_INT_REG0:/* Sticky interrupt flags */ 582 case TAS2770_LAT_INT_REG1:/* Sticky interrupt flags */ 583 case TAS2770_VBAT_MSB: 584 case TAS2770_VBAT_LSB: 585 case TAS2770_TEMP_MSB: 586 case TAS2770_TEMP_LSB: 587 return true; 588 } 589 590 return false; 591 } 592 593 static bool tas2770_writeable(struct device *dev, unsigned int reg) 594 { 595 switch (reg) { 596 case TAS2770_LVE_INT_REG0: 597 case TAS2770_LVE_INT_REG1: 598 case TAS2770_LAT_INT_REG0: 599 case TAS2770_LAT_INT_REG1: 600 case TAS2770_VBAT_MSB: 601 case TAS2770_VBAT_LSB: 602 case TAS2770_TEMP_MSB: 603 case TAS2770_TEMP_LSB: 604 case TAS2770_TDM_CLK_DETC: 605 case TAS2770_REV_AND_GPID: 606 return false; 607 } 608 609 return true; 610 } 611 612 static const struct regmap_range_cfg tas2770_regmap_ranges[] = { 613 { 614 .range_min = 0, 615 .range_max = 1 * 128, 616 .selector_reg = TAS2770_PAGE, 617 .selector_mask = 0xff, 618 .selector_shift = 0, 619 .window_start = 0, 620 .window_len = 128, 621 }, 622 }; 623 624 static const struct regmap_config tas2770_i2c_regmap = { 625 .reg_bits = 8, 626 .val_bits = 8, 627 .writeable_reg = tas2770_writeable, 628 .volatile_reg = tas2770_volatile, 629 .reg_defaults = tas2770_reg_defaults, 630 .num_reg_defaults = ARRAY_SIZE(tas2770_reg_defaults), 631 .cache_type = REGCACHE_RBTREE, 632 .ranges = tas2770_regmap_ranges, 633 .num_ranges = ARRAY_SIZE(tas2770_regmap_ranges), 634 .max_register = 1 * 128, 635 }; 636 637 static int tas2770_parse_dt(struct device *dev, struct tas2770_priv *tas2770) 638 { 639 int rc = 0; 640 641 rc = fwnode_property_read_u32(dev->fwnode, "ti,imon-slot-no", 642 &tas2770->i_sense_slot); 643 if (rc) { 644 dev_info(tas2770->dev, "Property %s is missing setting default slot\n", 645 "ti,imon-slot-no"); 646 647 tas2770->i_sense_slot = -1; 648 } 649 650 rc = fwnode_property_read_u32(dev->fwnode, "ti,vmon-slot-no", 651 &tas2770->v_sense_slot); 652 if (rc) { 653 dev_info(tas2770->dev, "Property %s is missing setting default slot\n", 654 "ti,vmon-slot-no"); 655 656 tas2770->v_sense_slot = -1; 657 } 658 659 tas2770->sdz_gpio = devm_gpiod_get_optional(dev, "shutdown", GPIOD_OUT_HIGH); 660 if (IS_ERR(tas2770->sdz_gpio)) { 661 if (PTR_ERR(tas2770->sdz_gpio) == -EPROBE_DEFER) 662 return -EPROBE_DEFER; 663 664 tas2770->sdz_gpio = NULL; 665 } 666 667 return 0; 668 } 669 670 static int tas2770_i2c_probe(struct i2c_client *client) 671 { 672 struct tas2770_priv *tas2770; 673 int result; 674 675 tas2770 = devm_kzalloc(&client->dev, sizeof(struct tas2770_priv), 676 GFP_KERNEL); 677 if (!tas2770) 678 return -ENOMEM; 679 680 tas2770->dev = &client->dev; 681 i2c_set_clientdata(client, tas2770); 682 dev_set_drvdata(&client->dev, tas2770); 683 684 tas2770->regmap = devm_regmap_init_i2c(client, &tas2770_i2c_regmap); 685 if (IS_ERR(tas2770->regmap)) { 686 result = PTR_ERR(tas2770->regmap); 687 dev_err(&client->dev, "Failed to allocate register map: %d\n", 688 result); 689 return result; 690 } 691 692 if (client->dev.of_node) { 693 result = tas2770_parse_dt(&client->dev, tas2770); 694 if (result) { 695 dev_err(tas2770->dev, "%s: Failed to parse devicetree\n", 696 __func__); 697 return result; 698 } 699 } 700 701 tas2770->reset_gpio = devm_gpiod_get_optional(tas2770->dev, "reset", 702 GPIOD_OUT_HIGH); 703 if (IS_ERR(tas2770->reset_gpio)) { 704 if (PTR_ERR(tas2770->reset_gpio) == -EPROBE_DEFER) { 705 tas2770->reset_gpio = NULL; 706 return -EPROBE_DEFER; 707 } 708 } 709 710 result = tas2770_register_codec(tas2770); 711 if (result) 712 dev_err(tas2770->dev, "Register codec failed.\n"); 713 714 return result; 715 } 716 717 static const struct i2c_device_id tas2770_i2c_id[] = { 718 { "tas2770"}, 719 { } 720 }; 721 MODULE_DEVICE_TABLE(i2c, tas2770_i2c_id); 722 723 #if defined(CONFIG_OF) 724 static const struct of_device_id tas2770_of_match[] = { 725 { .compatible = "ti,tas2770" }, 726 {}, 727 }; 728 MODULE_DEVICE_TABLE(of, tas2770_of_match); 729 #endif 730 731 static struct i2c_driver tas2770_i2c_driver = { 732 .driver = { 733 .name = "tas2770", 734 .of_match_table = of_match_ptr(tas2770_of_match), 735 }, 736 .probe = tas2770_i2c_probe, 737 .id_table = tas2770_i2c_id, 738 }; 739 module_i2c_driver(tas2770_i2c_driver); 740 741 MODULE_AUTHOR("Shi Fu <shifu0704@thundersoft.com>"); 742 MODULE_DESCRIPTION("TAS2770 I2C Smart Amplifier driver"); 743 MODULE_LICENSE("GPL v2"); 744