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.h> 18 #include <linux/gpio/consumer.h> 19 #include <linux/regulator/consumer.h> 20 #include <linux/firmware.h> 21 #include <linux/regmap.h> 22 #include <linux/of.h> 23 #include <linux/slab.h> 24 #include <sound/soc.h> 25 #include <sound/pcm.h> 26 #include <sound/pcm_params.h> 27 #include <sound/initval.h> 28 #include <sound/tlv.h> 29 30 #include "tas2770.h" 31 32 #define TAS2770_MDELAY 0xFFFFFFFE 33 34 static void tas2770_reset(struct tas2770_priv *tas2770) 35 { 36 if (tas2770->reset_gpio) { 37 gpiod_set_value_cansleep(tas2770->reset_gpio, 0); 38 msleep(20); 39 gpiod_set_value_cansleep(tas2770->reset_gpio, 1); 40 usleep_range(1000, 2000); 41 } 42 43 snd_soc_component_write(tas2770->component, TAS2770_SW_RST, 44 TAS2770_RST); 45 usleep_range(1000, 2000); 46 } 47 48 static int tas2770_update_pwr_ctrl(struct tas2770_priv *tas2770) 49 { 50 struct snd_soc_component *component = tas2770->component; 51 unsigned int val; 52 int ret; 53 54 if (tas2770->dac_powered) 55 val = tas2770->unmuted ? 56 TAS2770_PWR_CTRL_ACTIVE : TAS2770_PWR_CTRL_MUTE; 57 else 58 val = TAS2770_PWR_CTRL_SHUTDOWN; 59 60 ret = snd_soc_component_update_bits(component, TAS2770_PWR_CTRL, 61 TAS2770_PWR_CTRL_MASK, val); 62 if (ret < 0) 63 return ret; 64 65 return 0; 66 } 67 68 #ifdef CONFIG_PM 69 static int tas2770_codec_suspend(struct snd_soc_component *component) 70 { 71 struct tas2770_priv *tas2770 = snd_soc_component_get_drvdata(component); 72 int ret = 0; 73 74 regcache_cache_only(tas2770->regmap, true); 75 regcache_mark_dirty(tas2770->regmap); 76 77 if (tas2770->sdz_gpio) { 78 gpiod_set_value_cansleep(tas2770->sdz_gpio, 0); 79 } else { 80 ret = snd_soc_component_update_bits(component, TAS2770_PWR_CTRL, 81 TAS2770_PWR_CTRL_MASK, 82 TAS2770_PWR_CTRL_SHUTDOWN); 83 if (ret < 0) { 84 regcache_cache_only(tas2770->regmap, false); 85 regcache_sync(tas2770->regmap); 86 return ret; 87 } 88 89 ret = 0; 90 } 91 92 return ret; 93 } 94 95 static int tas2770_codec_resume(struct snd_soc_component *component) 96 { 97 struct tas2770_priv *tas2770 = snd_soc_component_get_drvdata(component); 98 int ret; 99 100 if (tas2770->sdz_gpio) { 101 gpiod_set_value_cansleep(tas2770->sdz_gpio, 1); 102 usleep_range(1000, 2000); 103 } else { 104 ret = tas2770_update_pwr_ctrl(tas2770); 105 if (ret < 0) 106 return ret; 107 } 108 109 regcache_cache_only(tas2770->regmap, false); 110 111 return regcache_sync(tas2770->regmap); 112 } 113 #else 114 #define tas2770_codec_suspend NULL 115 #define tas2770_codec_resume NULL 116 #endif 117 118 static const char * const tas2770_ASI1_src[] = { 119 "I2C offset", "Left", "Right", "LeftRightDiv2", 120 }; 121 122 static SOC_ENUM_SINGLE_DECL( 123 tas2770_ASI1_src_enum, TAS2770_TDM_CFG_REG2, 124 4, tas2770_ASI1_src); 125 126 static const struct snd_kcontrol_new tas2770_asi1_mux = 127 SOC_DAPM_ENUM("ASI1 Source", tas2770_ASI1_src_enum); 128 129 static int tas2770_dac_event(struct snd_soc_dapm_widget *w, 130 struct snd_kcontrol *kcontrol, int event) 131 { 132 struct snd_soc_component *component = 133 snd_soc_dapm_to_component(w->dapm); 134 struct tas2770_priv *tas2770 = 135 snd_soc_component_get_drvdata(component); 136 int ret; 137 138 switch (event) { 139 case SND_SOC_DAPM_POST_PMU: 140 tas2770->dac_powered = 1; 141 ret = tas2770_update_pwr_ctrl(tas2770); 142 break; 143 case SND_SOC_DAPM_PRE_PMD: 144 tas2770->dac_powered = 0; 145 ret = tas2770_update_pwr_ctrl(tas2770); 146 break; 147 default: 148 dev_err(tas2770->dev, "Not supported evevt\n"); 149 return -EINVAL; 150 } 151 152 return ret; 153 } 154 155 static const struct snd_kcontrol_new isense_switch = 156 SOC_DAPM_SINGLE("Switch", TAS2770_PWR_CTRL, 3, 1, 1); 157 static const struct snd_kcontrol_new vsense_switch = 158 SOC_DAPM_SINGLE("Switch", TAS2770_PWR_CTRL, 2, 1, 1); 159 160 static const struct snd_soc_dapm_widget tas2770_dapm_widgets[] = { 161 SND_SOC_DAPM_AIF_IN("ASI1", "ASI1 Playback", 0, SND_SOC_NOPM, 0, 0), 162 SND_SOC_DAPM_MUX("ASI1 Sel", SND_SOC_NOPM, 0, 0, &tas2770_asi1_mux), 163 SND_SOC_DAPM_SWITCH("ISENSE", TAS2770_PWR_CTRL, 3, 1, &isense_switch), 164 SND_SOC_DAPM_SWITCH("VSENSE", TAS2770_PWR_CTRL, 2, 1, &vsense_switch), 165 SND_SOC_DAPM_DAC_E("DAC", NULL, SND_SOC_NOPM, 0, 0, tas2770_dac_event, 166 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD), 167 SND_SOC_DAPM_OUTPUT("OUT"), 168 SND_SOC_DAPM_SIGGEN("VMON"), 169 SND_SOC_DAPM_SIGGEN("IMON") 170 }; 171 172 static const struct snd_soc_dapm_route tas2770_audio_map[] = { 173 {"ASI1 Sel", "I2C offset", "ASI1"}, 174 {"ASI1 Sel", "Left", "ASI1"}, 175 {"ASI1 Sel", "Right", "ASI1"}, 176 {"ASI1 Sel", "LeftRightDiv2", "ASI1"}, 177 {"DAC", NULL, "ASI1 Sel"}, 178 {"OUT", NULL, "DAC"}, 179 {"ISENSE", "Switch", "IMON"}, 180 {"VSENSE", "Switch", "VMON"}, 181 }; 182 183 static int tas2770_mute(struct snd_soc_dai *dai, int mute, int direction) 184 { 185 struct snd_soc_component *component = dai->component; 186 struct tas2770_priv *tas2770 = 187 snd_soc_component_get_drvdata(component); 188 189 tas2770->unmuted = !mute; 190 return tas2770_update_pwr_ctrl(tas2770); 191 } 192 193 static int tas2770_set_bitwidth(struct tas2770_priv *tas2770, int bitwidth) 194 { 195 int ret; 196 struct snd_soc_component *component = tas2770->component; 197 198 switch (bitwidth) { 199 case SNDRV_PCM_FORMAT_S16_LE: 200 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2, 201 TAS2770_TDM_CFG_REG2_RXW_MASK, 202 TAS2770_TDM_CFG_REG2_RXW_16BITS); 203 tas2770->v_sense_slot = tas2770->i_sense_slot + 2; 204 break; 205 case SNDRV_PCM_FORMAT_S24_LE: 206 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2, 207 TAS2770_TDM_CFG_REG2_RXW_MASK, 208 TAS2770_TDM_CFG_REG2_RXW_24BITS); 209 tas2770->v_sense_slot = tas2770->i_sense_slot + 4; 210 break; 211 case SNDRV_PCM_FORMAT_S32_LE: 212 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2, 213 TAS2770_TDM_CFG_REG2_RXW_MASK, 214 TAS2770_TDM_CFG_REG2_RXW_32BITS); 215 tas2770->v_sense_slot = tas2770->i_sense_slot + 4; 216 break; 217 218 default: 219 return -EINVAL; 220 } 221 222 if (ret < 0) 223 return ret; 224 225 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG5, 226 TAS2770_TDM_CFG_REG5_VSNS_MASK | 227 TAS2770_TDM_CFG_REG5_50_MASK, 228 TAS2770_TDM_CFG_REG5_VSNS_ENABLE | 229 tas2770->v_sense_slot); 230 if (ret < 0) 231 return ret; 232 233 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG6, 234 TAS2770_TDM_CFG_REG6_ISNS_MASK | 235 TAS2770_TDM_CFG_REG6_50_MASK, 236 TAS2770_TDM_CFG_REG6_ISNS_ENABLE | 237 tas2770->i_sense_slot); 238 if (ret < 0) 239 return ret; 240 241 return 0; 242 } 243 244 static int tas2770_set_samplerate(struct tas2770_priv *tas2770, int samplerate) 245 { 246 struct snd_soc_component *component = tas2770->component; 247 int ramp_rate_val; 248 int ret; 249 250 switch (samplerate) { 251 case 48000: 252 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_48KHZ | 253 TAS2770_TDM_CFG_REG0_31_44_1_48KHZ; 254 break; 255 case 44100: 256 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_44_1KHZ | 257 TAS2770_TDM_CFG_REG0_31_44_1_48KHZ; 258 break; 259 case 96000: 260 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_48KHZ | 261 TAS2770_TDM_CFG_REG0_31_88_2_96KHZ; 262 break; 263 case 88200: 264 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_44_1KHZ | 265 TAS2770_TDM_CFG_REG0_31_88_2_96KHZ; 266 break; 267 case 192000: 268 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_48KHZ | 269 TAS2770_TDM_CFG_REG0_31_176_4_192KHZ; 270 break; 271 case 176400: 272 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_44_1KHZ | 273 TAS2770_TDM_CFG_REG0_31_176_4_192KHZ; 274 break; 275 default: 276 return -EINVAL; 277 } 278 279 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG0, 280 TAS2770_TDM_CFG_REG0_SMP_MASK | 281 TAS2770_TDM_CFG_REG0_31_MASK, 282 ramp_rate_val); 283 if (ret < 0) 284 return ret; 285 286 return 0; 287 } 288 289 static int tas2770_hw_params(struct snd_pcm_substream *substream, 290 struct snd_pcm_hw_params *params, 291 struct snd_soc_dai *dai) 292 { 293 struct snd_soc_component *component = dai->component; 294 struct tas2770_priv *tas2770 = 295 snd_soc_component_get_drvdata(component); 296 int ret; 297 298 ret = tas2770_set_bitwidth(tas2770, params_format(params)); 299 if (ret) 300 return ret; 301 302 return tas2770_set_samplerate(tas2770, params_rate(params)); 303 } 304 305 static int tas2770_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) 306 { 307 struct snd_soc_component *component = dai->component; 308 struct tas2770_priv *tas2770 = 309 snd_soc_component_get_drvdata(component); 310 u8 tdm_rx_start_slot = 0, invert_fpol = 0, fpol_preinv = 0, asi_cfg_1 = 0; 311 int ret; 312 313 switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) { 314 case SND_SOC_DAIFMT_CBC_CFC: 315 break; 316 default: 317 dev_err(tas2770->dev, "ASI invalid DAI clocking\n"); 318 return -EINVAL; 319 } 320 321 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 322 case SND_SOC_DAIFMT_NB_IF: 323 invert_fpol = 1; 324 fallthrough; 325 case SND_SOC_DAIFMT_NB_NF: 326 asi_cfg_1 |= TAS2770_TDM_CFG_REG1_RX_RSING; 327 break; 328 case SND_SOC_DAIFMT_IB_IF: 329 invert_fpol = 1; 330 fallthrough; 331 case SND_SOC_DAIFMT_IB_NF: 332 asi_cfg_1 |= TAS2770_TDM_CFG_REG1_RX_FALING; 333 break; 334 default: 335 dev_err(tas2770->dev, "ASI format Inverse is not found\n"); 336 return -EINVAL; 337 } 338 339 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG1, 340 TAS2770_TDM_CFG_REG1_RX_MASK, 341 asi_cfg_1); 342 if (ret < 0) 343 return ret; 344 345 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 346 case SND_SOC_DAIFMT_I2S: 347 tdm_rx_start_slot = 1; 348 fpol_preinv = 0; 349 break; 350 case SND_SOC_DAIFMT_DSP_A: 351 tdm_rx_start_slot = 0; 352 fpol_preinv = 1; 353 break; 354 case SND_SOC_DAIFMT_DSP_B: 355 tdm_rx_start_slot = 1; 356 fpol_preinv = 1; 357 break; 358 case SND_SOC_DAIFMT_LEFT_J: 359 tdm_rx_start_slot = 0; 360 fpol_preinv = 1; 361 break; 362 default: 363 dev_err(tas2770->dev, 364 "DAI Format is not found, fmt=0x%x\n", fmt); 365 return -EINVAL; 366 } 367 368 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG1, 369 TAS2770_TDM_CFG_REG1_MASK, 370 (tdm_rx_start_slot << TAS2770_TDM_CFG_REG1_51_SHIFT)); 371 if (ret < 0) 372 return ret; 373 374 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG0, 375 TAS2770_TDM_CFG_REG0_FPOL_MASK, 376 (fpol_preinv ^ invert_fpol) 377 ? TAS2770_TDM_CFG_REG0_FPOL_RSING 378 : TAS2770_TDM_CFG_REG0_FPOL_FALING); 379 if (ret < 0) 380 return ret; 381 382 return 0; 383 } 384 385 static int tas2770_set_dai_tdm_slot(struct snd_soc_dai *dai, 386 unsigned int tx_mask, 387 unsigned int rx_mask, 388 int slots, int slot_width) 389 { 390 struct snd_soc_component *component = dai->component; 391 int left_slot, right_slot; 392 int ret; 393 394 if (tx_mask == 0 || rx_mask != 0) 395 return -EINVAL; 396 397 left_slot = __ffs(tx_mask); 398 tx_mask &= ~(1 << left_slot); 399 if (tx_mask == 0) { 400 right_slot = left_slot; 401 } else { 402 right_slot = __ffs(tx_mask); 403 tx_mask &= ~(1 << right_slot); 404 } 405 406 if (tx_mask != 0 || left_slot >= slots || right_slot >= slots) 407 return -EINVAL; 408 409 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG3, 410 TAS2770_TDM_CFG_REG3_30_MASK, 411 (left_slot << TAS2770_TDM_CFG_REG3_30_SHIFT)); 412 if (ret < 0) 413 return ret; 414 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG3, 415 TAS2770_TDM_CFG_REG3_RXS_MASK, 416 (right_slot << TAS2770_TDM_CFG_REG3_RXS_SHIFT)); 417 if (ret < 0) 418 return ret; 419 420 switch (slot_width) { 421 case 16: 422 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2, 423 TAS2770_TDM_CFG_REG2_RXS_MASK, 424 TAS2770_TDM_CFG_REG2_RXS_16BITS); 425 break; 426 case 24: 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_24BITS); 430 break; 431 case 32: 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_32BITS); 435 break; 436 case 0: 437 /* Do not change slot width */ 438 ret = 0; 439 break; 440 default: 441 ret = -EINVAL; 442 } 443 444 if (ret < 0) 445 return ret; 446 447 return 0; 448 } 449 450 static const struct snd_soc_dai_ops tas2770_dai_ops = { 451 .mute_stream = tas2770_mute, 452 .hw_params = tas2770_hw_params, 453 .set_fmt = tas2770_set_fmt, 454 .set_tdm_slot = tas2770_set_dai_tdm_slot, 455 .no_capture_mute = 1, 456 }; 457 458 #define TAS2770_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ 459 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE) 460 461 #define TAS2770_RATES (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |\ 462 SNDRV_PCM_RATE_96000 |\ 463 SNDRV_PCM_RATE_192000\ 464 ) 465 466 static struct snd_soc_dai_driver tas2770_dai_driver[] = { 467 { 468 .name = "tas2770 ASI1", 469 .id = 0, 470 .playback = { 471 .stream_name = "ASI1 Playback", 472 .channels_min = 1, 473 .channels_max = 2, 474 .rates = TAS2770_RATES, 475 .formats = TAS2770_FORMATS, 476 }, 477 .capture = { 478 .stream_name = "ASI1 Capture", 479 .channels_min = 0, 480 .channels_max = 2, 481 .rates = TAS2770_RATES, 482 .formats = TAS2770_FORMATS, 483 }, 484 .ops = &tas2770_dai_ops, 485 .symmetric_rate = 1, 486 }, 487 }; 488 489 static const struct regmap_config tas2770_i2c_regmap; 490 491 static int tas2770_codec_probe(struct snd_soc_component *component) 492 { 493 struct tas2770_priv *tas2770 = 494 snd_soc_component_get_drvdata(component); 495 496 tas2770->component = component; 497 498 if (tas2770->sdz_gpio) { 499 gpiod_set_value_cansleep(tas2770->sdz_gpio, 1); 500 usleep_range(1000, 2000); 501 } 502 503 tas2770_reset(tas2770); 504 regmap_reinit_cache(tas2770->regmap, &tas2770_i2c_regmap); 505 506 return 0; 507 } 508 509 static DECLARE_TLV_DB_SCALE(tas2770_digital_tlv, 1100, 50, 0); 510 static DECLARE_TLV_DB_SCALE(tas2770_playback_volume, -12750, 50, 0); 511 512 static const struct snd_kcontrol_new tas2770_snd_controls[] = { 513 SOC_SINGLE_TLV("Speaker Playback Volume", TAS2770_PLAY_CFG_REG2, 514 0, TAS2770_PLAY_CFG_REG2_VMAX, 1, tas2770_playback_volume), 515 SOC_SINGLE_TLV("Amp Gain Volume", TAS2770_PLAY_CFG_REG0, 0, 0x14, 0, 516 tas2770_digital_tlv), 517 }; 518 519 static const struct snd_soc_component_driver soc_component_driver_tas2770 = { 520 .probe = tas2770_codec_probe, 521 .suspend = tas2770_codec_suspend, 522 .resume = tas2770_codec_resume, 523 .controls = tas2770_snd_controls, 524 .num_controls = ARRAY_SIZE(tas2770_snd_controls), 525 .dapm_widgets = tas2770_dapm_widgets, 526 .num_dapm_widgets = ARRAY_SIZE(tas2770_dapm_widgets), 527 .dapm_routes = tas2770_audio_map, 528 .num_dapm_routes = ARRAY_SIZE(tas2770_audio_map), 529 .idle_bias_on = 1, 530 .endianness = 1, 531 }; 532 533 static int tas2770_register_codec(struct tas2770_priv *tas2770) 534 { 535 return devm_snd_soc_register_component(tas2770->dev, 536 &soc_component_driver_tas2770, 537 tas2770_dai_driver, ARRAY_SIZE(tas2770_dai_driver)); 538 } 539 540 static const struct reg_default tas2770_reg_defaults[] = { 541 { TAS2770_PAGE, 0x00 }, 542 { TAS2770_SW_RST, 0x00 }, 543 { TAS2770_PWR_CTRL, 0x0e }, 544 { TAS2770_PLAY_CFG_REG0, 0x10 }, 545 { TAS2770_PLAY_CFG_REG1, 0x01 }, 546 { TAS2770_PLAY_CFG_REG2, 0x00 }, 547 { TAS2770_MSC_CFG_REG0, 0x07 }, 548 { TAS2770_TDM_CFG_REG1, 0x02 }, 549 { TAS2770_TDM_CFG_REG2, 0x0a }, 550 { TAS2770_TDM_CFG_REG3, 0x10 }, 551 { TAS2770_INT_MASK_REG0, 0xfc }, 552 { TAS2770_INT_MASK_REG1, 0xb1 }, 553 { TAS2770_INT_CFG, 0x05 }, 554 { TAS2770_MISC_IRQ, 0x81 }, 555 { TAS2770_CLK_CGF, 0x0c }, 556 557 }; 558 559 static bool tas2770_volatile(struct device *dev, unsigned int reg) 560 { 561 switch (reg) { 562 case TAS2770_PAGE: /* regmap implementation requires this */ 563 case TAS2770_SW_RST: /* always clears after write */ 564 case TAS2770_BO_PRV_REG0:/* has a self clearing bit */ 565 case TAS2770_LVE_INT_REG0: 566 case TAS2770_LVE_INT_REG1: 567 case TAS2770_LAT_INT_REG0:/* Sticky interrupt flags */ 568 case TAS2770_LAT_INT_REG1:/* Sticky interrupt flags */ 569 case TAS2770_VBAT_MSB: 570 case TAS2770_VBAT_LSB: 571 case TAS2770_TEMP_MSB: 572 case TAS2770_TEMP_LSB: 573 return true; 574 } 575 576 return false; 577 } 578 579 static bool tas2770_writeable(struct device *dev, unsigned int reg) 580 { 581 switch (reg) { 582 case TAS2770_LVE_INT_REG0: 583 case TAS2770_LVE_INT_REG1: 584 case TAS2770_LAT_INT_REG0: 585 case TAS2770_LAT_INT_REG1: 586 case TAS2770_VBAT_MSB: 587 case TAS2770_VBAT_LSB: 588 case TAS2770_TEMP_MSB: 589 case TAS2770_TEMP_LSB: 590 case TAS2770_TDM_CLK_DETC: 591 case TAS2770_REV_AND_GPID: 592 return false; 593 } 594 595 return true; 596 } 597 598 static const struct regmap_range_cfg tas2770_regmap_ranges[] = { 599 { 600 .range_min = 0, 601 .range_max = 1 * 128, 602 .selector_reg = TAS2770_PAGE, 603 .selector_mask = 0xff, 604 .selector_shift = 0, 605 .window_start = 0, 606 .window_len = 128, 607 }, 608 }; 609 610 static const struct regmap_config tas2770_i2c_regmap = { 611 .reg_bits = 8, 612 .val_bits = 8, 613 .writeable_reg = tas2770_writeable, 614 .volatile_reg = tas2770_volatile, 615 .reg_defaults = tas2770_reg_defaults, 616 .num_reg_defaults = ARRAY_SIZE(tas2770_reg_defaults), 617 .cache_type = REGCACHE_RBTREE, 618 .ranges = tas2770_regmap_ranges, 619 .num_ranges = ARRAY_SIZE(tas2770_regmap_ranges), 620 .max_register = 1 * 128, 621 }; 622 623 static int tas2770_parse_dt(struct device *dev, struct tas2770_priv *tas2770) 624 { 625 int rc = 0; 626 627 rc = fwnode_property_read_u32(dev->fwnode, "ti,imon-slot-no", 628 &tas2770->i_sense_slot); 629 if (rc) { 630 dev_info(tas2770->dev, "Property %s is missing setting default slot\n", 631 "ti,imon-slot-no"); 632 633 tas2770->i_sense_slot = 0; 634 } 635 636 rc = fwnode_property_read_u32(dev->fwnode, "ti,vmon-slot-no", 637 &tas2770->v_sense_slot); 638 if (rc) { 639 dev_info(tas2770->dev, "Property %s is missing setting default slot\n", 640 "ti,vmon-slot-no"); 641 642 tas2770->v_sense_slot = 2; 643 } 644 645 tas2770->sdz_gpio = devm_gpiod_get_optional(dev, "shutdown", GPIOD_OUT_HIGH); 646 if (IS_ERR(tas2770->sdz_gpio)) { 647 if (PTR_ERR(tas2770->sdz_gpio) == -EPROBE_DEFER) 648 return -EPROBE_DEFER; 649 650 tas2770->sdz_gpio = NULL; 651 } 652 653 return 0; 654 } 655 656 static int tas2770_i2c_probe(struct i2c_client *client) 657 { 658 struct tas2770_priv *tas2770; 659 int result; 660 661 tas2770 = devm_kzalloc(&client->dev, sizeof(struct tas2770_priv), 662 GFP_KERNEL); 663 if (!tas2770) 664 return -ENOMEM; 665 666 tas2770->dev = &client->dev; 667 i2c_set_clientdata(client, tas2770); 668 dev_set_drvdata(&client->dev, tas2770); 669 670 tas2770->regmap = devm_regmap_init_i2c(client, &tas2770_i2c_regmap); 671 if (IS_ERR(tas2770->regmap)) { 672 result = PTR_ERR(tas2770->regmap); 673 dev_err(&client->dev, "Failed to allocate register map: %d\n", 674 result); 675 return result; 676 } 677 678 if (client->dev.of_node) { 679 result = tas2770_parse_dt(&client->dev, tas2770); 680 if (result) { 681 dev_err(tas2770->dev, "%s: Failed to parse devicetree\n", 682 __func__); 683 return result; 684 } 685 } 686 687 tas2770->reset_gpio = devm_gpiod_get_optional(tas2770->dev, "reset", 688 GPIOD_OUT_HIGH); 689 if (IS_ERR(tas2770->reset_gpio)) { 690 if (PTR_ERR(tas2770->reset_gpio) == -EPROBE_DEFER) { 691 tas2770->reset_gpio = NULL; 692 return -EPROBE_DEFER; 693 } 694 } 695 696 result = tas2770_register_codec(tas2770); 697 if (result) 698 dev_err(tas2770->dev, "Register codec failed.\n"); 699 700 return result; 701 } 702 703 static const struct i2c_device_id tas2770_i2c_id[] = { 704 { "tas2770"}, 705 { } 706 }; 707 MODULE_DEVICE_TABLE(i2c, tas2770_i2c_id); 708 709 #if defined(CONFIG_OF) 710 static const struct of_device_id tas2770_of_match[] = { 711 { .compatible = "ti,tas2770" }, 712 {}, 713 }; 714 MODULE_DEVICE_TABLE(of, tas2770_of_match); 715 #endif 716 717 static struct i2c_driver tas2770_i2c_driver = { 718 .driver = { 719 .name = "tas2770", 720 .of_match_table = of_match_ptr(tas2770_of_match), 721 }, 722 .probe = tas2770_i2c_probe, 723 .id_table = tas2770_i2c_id, 724 }; 725 module_i2c_driver(tas2770_i2c_driver); 726 727 MODULE_AUTHOR("Shi Fu <shifu0704@thundersoft.com>"); 728 MODULE_DESCRIPTION("TAS2770 I2C Smart Amplifier driver"); 729 MODULE_LICENSE("GPL v2"); 730