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_bitwidth(struct tas2770_priv *tas2770, int bitwidth) 193 { 194 int ret; 195 struct snd_soc_component *component = tas2770->component; 196 197 switch (bitwidth) { 198 case SNDRV_PCM_FORMAT_S16_LE: 199 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2, 200 TAS2770_TDM_CFG_REG2_RXW_MASK, 201 TAS2770_TDM_CFG_REG2_RXW_16BITS); 202 tas2770->v_sense_slot = tas2770->i_sense_slot + 2; 203 break; 204 case SNDRV_PCM_FORMAT_S24_LE: 205 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2, 206 TAS2770_TDM_CFG_REG2_RXW_MASK, 207 TAS2770_TDM_CFG_REG2_RXW_24BITS); 208 tas2770->v_sense_slot = tas2770->i_sense_slot + 4; 209 break; 210 case SNDRV_PCM_FORMAT_S32_LE: 211 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2, 212 TAS2770_TDM_CFG_REG2_RXW_MASK, 213 TAS2770_TDM_CFG_REG2_RXW_32BITS); 214 tas2770->v_sense_slot = tas2770->i_sense_slot + 4; 215 break; 216 217 default: 218 return -EINVAL; 219 } 220 221 if (ret < 0) 222 return ret; 223 224 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG5, 225 TAS2770_TDM_CFG_REG5_VSNS_MASK | 226 TAS2770_TDM_CFG_REG5_50_MASK, 227 TAS2770_TDM_CFG_REG5_VSNS_ENABLE | 228 tas2770->v_sense_slot); 229 if (ret < 0) 230 return ret; 231 232 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG6, 233 TAS2770_TDM_CFG_REG6_ISNS_MASK | 234 TAS2770_TDM_CFG_REG6_50_MASK, 235 TAS2770_TDM_CFG_REG6_ISNS_ENABLE | 236 tas2770->i_sense_slot); 237 if (ret < 0) 238 return ret; 239 240 return 0; 241 } 242 243 static int tas2770_set_samplerate(struct tas2770_priv *tas2770, int samplerate) 244 { 245 struct snd_soc_component *component = tas2770->component; 246 int ramp_rate_val; 247 int ret; 248 249 switch (samplerate) { 250 case 48000: 251 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_48KHZ | 252 TAS2770_TDM_CFG_REG0_31_44_1_48KHZ; 253 break; 254 case 44100: 255 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_44_1KHZ | 256 TAS2770_TDM_CFG_REG0_31_44_1_48KHZ; 257 break; 258 case 96000: 259 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_48KHZ | 260 TAS2770_TDM_CFG_REG0_31_88_2_96KHZ; 261 break; 262 case 88200: 263 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_44_1KHZ | 264 TAS2770_TDM_CFG_REG0_31_88_2_96KHZ; 265 break; 266 case 192000: 267 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_48KHZ | 268 TAS2770_TDM_CFG_REG0_31_176_4_192KHZ; 269 break; 270 case 176400: 271 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_44_1KHZ | 272 TAS2770_TDM_CFG_REG0_31_176_4_192KHZ; 273 break; 274 default: 275 return -EINVAL; 276 } 277 278 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG0, 279 TAS2770_TDM_CFG_REG0_SMP_MASK | 280 TAS2770_TDM_CFG_REG0_31_MASK, 281 ramp_rate_val); 282 if (ret < 0) 283 return ret; 284 285 return 0; 286 } 287 288 static int tas2770_hw_params(struct snd_pcm_substream *substream, 289 struct snd_pcm_hw_params *params, 290 struct snd_soc_dai *dai) 291 { 292 struct snd_soc_component *component = dai->component; 293 struct tas2770_priv *tas2770 = 294 snd_soc_component_get_drvdata(component); 295 int ret; 296 297 ret = tas2770_set_bitwidth(tas2770, params_format(params)); 298 if (ret) 299 return ret; 300 301 return tas2770_set_samplerate(tas2770, params_rate(params)); 302 } 303 304 static int tas2770_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) 305 { 306 struct snd_soc_component *component = dai->component; 307 struct tas2770_priv *tas2770 = 308 snd_soc_component_get_drvdata(component); 309 u8 tdm_rx_start_slot = 0, invert_fpol = 0, fpol_preinv = 0, asi_cfg_1 = 0; 310 int ret; 311 312 switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) { 313 case SND_SOC_DAIFMT_CBC_CFC: 314 break; 315 default: 316 dev_err(tas2770->dev, "ASI invalid DAI clocking\n"); 317 return -EINVAL; 318 } 319 320 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 321 case SND_SOC_DAIFMT_NB_IF: 322 invert_fpol = 1; 323 fallthrough; 324 case SND_SOC_DAIFMT_NB_NF: 325 asi_cfg_1 |= TAS2770_TDM_CFG_REG1_RX_RSING; 326 break; 327 case SND_SOC_DAIFMT_IB_IF: 328 invert_fpol = 1; 329 fallthrough; 330 case SND_SOC_DAIFMT_IB_NF: 331 asi_cfg_1 |= TAS2770_TDM_CFG_REG1_RX_FALING; 332 break; 333 default: 334 dev_err(tas2770->dev, "ASI format Inverse is not found\n"); 335 return -EINVAL; 336 } 337 338 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG1, 339 TAS2770_TDM_CFG_REG1_RX_MASK, 340 asi_cfg_1); 341 if (ret < 0) 342 return ret; 343 344 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 345 case SND_SOC_DAIFMT_I2S: 346 tdm_rx_start_slot = 1; 347 fpol_preinv = 0; 348 break; 349 case SND_SOC_DAIFMT_DSP_A: 350 tdm_rx_start_slot = 0; 351 fpol_preinv = 1; 352 break; 353 case SND_SOC_DAIFMT_DSP_B: 354 tdm_rx_start_slot = 1; 355 fpol_preinv = 1; 356 break; 357 case SND_SOC_DAIFMT_LEFT_J: 358 tdm_rx_start_slot = 0; 359 fpol_preinv = 1; 360 break; 361 default: 362 dev_err(tas2770->dev, 363 "DAI Format is not found, fmt=0x%x\n", fmt); 364 return -EINVAL; 365 } 366 367 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG1, 368 TAS2770_TDM_CFG_REG1_MASK, 369 (tdm_rx_start_slot << TAS2770_TDM_CFG_REG1_51_SHIFT)); 370 if (ret < 0) 371 return ret; 372 373 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG0, 374 TAS2770_TDM_CFG_REG0_FPOL_MASK, 375 (fpol_preinv ^ invert_fpol) 376 ? TAS2770_TDM_CFG_REG0_FPOL_RSING 377 : TAS2770_TDM_CFG_REG0_FPOL_FALING); 378 if (ret < 0) 379 return ret; 380 381 return 0; 382 } 383 384 static int tas2770_set_dai_tdm_slot(struct snd_soc_dai *dai, 385 unsigned int tx_mask, 386 unsigned int rx_mask, 387 int slots, int slot_width) 388 { 389 struct snd_soc_component *component = dai->component; 390 int left_slot, right_slot; 391 int ret; 392 393 if (tx_mask == 0 || rx_mask != 0) 394 return -EINVAL; 395 396 left_slot = __ffs(tx_mask); 397 tx_mask &= ~(1 << left_slot); 398 if (tx_mask == 0) { 399 right_slot = left_slot; 400 } else { 401 right_slot = __ffs(tx_mask); 402 tx_mask &= ~(1 << right_slot); 403 } 404 405 if (tx_mask != 0 || left_slot >= slots || right_slot >= slots) 406 return -EINVAL; 407 408 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG3, 409 TAS2770_TDM_CFG_REG3_30_MASK, 410 (left_slot << TAS2770_TDM_CFG_REG3_30_SHIFT)); 411 if (ret < 0) 412 return ret; 413 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG3, 414 TAS2770_TDM_CFG_REG3_RXS_MASK, 415 (right_slot << TAS2770_TDM_CFG_REG3_RXS_SHIFT)); 416 if (ret < 0) 417 return ret; 418 419 switch (slot_width) { 420 case 16: 421 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2, 422 TAS2770_TDM_CFG_REG2_RXS_MASK, 423 TAS2770_TDM_CFG_REG2_RXS_16BITS); 424 break; 425 case 24: 426 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2, 427 TAS2770_TDM_CFG_REG2_RXS_MASK, 428 TAS2770_TDM_CFG_REG2_RXS_24BITS); 429 break; 430 case 32: 431 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2, 432 TAS2770_TDM_CFG_REG2_RXS_MASK, 433 TAS2770_TDM_CFG_REG2_RXS_32BITS); 434 break; 435 case 0: 436 /* Do not change slot width */ 437 ret = 0; 438 break; 439 default: 440 ret = -EINVAL; 441 } 442 443 if (ret < 0) 444 return ret; 445 446 return 0; 447 } 448 449 static const struct snd_soc_dai_ops tas2770_dai_ops = { 450 .mute_stream = tas2770_mute, 451 .hw_params = tas2770_hw_params, 452 .set_fmt = tas2770_set_fmt, 453 .set_tdm_slot = tas2770_set_dai_tdm_slot, 454 .no_capture_mute = 1, 455 }; 456 457 #define TAS2770_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ 458 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE) 459 460 #define TAS2770_RATES (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |\ 461 SNDRV_PCM_RATE_96000 |\ 462 SNDRV_PCM_RATE_192000\ 463 ) 464 465 static struct snd_soc_dai_driver tas2770_dai_driver[] = { 466 { 467 .name = "tas2770 ASI1", 468 .id = 0, 469 .playback = { 470 .stream_name = "ASI1 Playback", 471 .channels_min = 1, 472 .channels_max = 2, 473 .rates = TAS2770_RATES, 474 .formats = TAS2770_FORMATS, 475 }, 476 .capture = { 477 .stream_name = "ASI1 Capture", 478 .channels_min = 0, 479 .channels_max = 2, 480 .rates = TAS2770_RATES, 481 .formats = TAS2770_FORMATS, 482 }, 483 .ops = &tas2770_dai_ops, 484 .symmetric_rate = 1, 485 }, 486 }; 487 488 static const struct regmap_config tas2770_i2c_regmap; 489 490 static int tas2770_codec_probe(struct snd_soc_component *component) 491 { 492 struct tas2770_priv *tas2770 = 493 snd_soc_component_get_drvdata(component); 494 495 tas2770->component = component; 496 497 if (tas2770->sdz_gpio) { 498 gpiod_set_value_cansleep(tas2770->sdz_gpio, 1); 499 usleep_range(1000, 2000); 500 } 501 502 tas2770_reset(tas2770); 503 regmap_reinit_cache(tas2770->regmap, &tas2770_i2c_regmap); 504 505 return 0; 506 } 507 508 static DECLARE_TLV_DB_SCALE(tas2770_digital_tlv, 1100, 50, 0); 509 static DECLARE_TLV_DB_SCALE(tas2770_playback_volume, -12750, 50, 0); 510 511 static const struct snd_kcontrol_new tas2770_snd_controls[] = { 512 SOC_SINGLE_TLV("Speaker Playback Volume", TAS2770_PLAY_CFG_REG2, 513 0, TAS2770_PLAY_CFG_REG2_VMAX, 1, tas2770_playback_volume), 514 SOC_SINGLE_TLV("Amp Gain Volume", TAS2770_PLAY_CFG_REG0, 0, 0x14, 0, 515 tas2770_digital_tlv), 516 }; 517 518 static const struct snd_soc_component_driver soc_component_driver_tas2770 = { 519 .probe = tas2770_codec_probe, 520 .suspend = tas2770_codec_suspend, 521 .resume = tas2770_codec_resume, 522 .controls = tas2770_snd_controls, 523 .num_controls = ARRAY_SIZE(tas2770_snd_controls), 524 .dapm_widgets = tas2770_dapm_widgets, 525 .num_dapm_widgets = ARRAY_SIZE(tas2770_dapm_widgets), 526 .dapm_routes = tas2770_audio_map, 527 .num_dapm_routes = ARRAY_SIZE(tas2770_audio_map), 528 .idle_bias_on = 1, 529 .endianness = 1, 530 }; 531 532 static int tas2770_register_codec(struct tas2770_priv *tas2770) 533 { 534 return devm_snd_soc_register_component(tas2770->dev, 535 &soc_component_driver_tas2770, 536 tas2770_dai_driver, ARRAY_SIZE(tas2770_dai_driver)); 537 } 538 539 static const struct reg_default tas2770_reg_defaults[] = { 540 { TAS2770_PAGE, 0x00 }, 541 { TAS2770_SW_RST, 0x00 }, 542 { TAS2770_PWR_CTRL, 0x0e }, 543 { TAS2770_PLAY_CFG_REG0, 0x10 }, 544 { TAS2770_PLAY_CFG_REG1, 0x01 }, 545 { TAS2770_PLAY_CFG_REG2, 0x00 }, 546 { TAS2770_MSC_CFG_REG0, 0x07 }, 547 { TAS2770_TDM_CFG_REG1, 0x02 }, 548 { TAS2770_TDM_CFG_REG2, 0x0a }, 549 { TAS2770_TDM_CFG_REG3, 0x10 }, 550 { TAS2770_INT_MASK_REG0, 0xfc }, 551 { TAS2770_INT_MASK_REG1, 0xb1 }, 552 { TAS2770_INT_CFG, 0x05 }, 553 { TAS2770_MISC_IRQ, 0x81 }, 554 { TAS2770_CLK_CGF, 0x0c }, 555 556 }; 557 558 static bool tas2770_volatile(struct device *dev, unsigned int reg) 559 { 560 switch (reg) { 561 case TAS2770_PAGE: /* regmap implementation requires this */ 562 case TAS2770_SW_RST: /* always clears after write */ 563 case TAS2770_BO_PRV_REG0:/* has a self clearing bit */ 564 case TAS2770_LVE_INT_REG0: 565 case TAS2770_LVE_INT_REG1: 566 case TAS2770_LAT_INT_REG0:/* Sticky interrupt flags */ 567 case TAS2770_LAT_INT_REG1:/* Sticky interrupt flags */ 568 case TAS2770_VBAT_MSB: 569 case TAS2770_VBAT_LSB: 570 case TAS2770_TEMP_MSB: 571 case TAS2770_TEMP_LSB: 572 return true; 573 } 574 575 return false; 576 } 577 578 static bool tas2770_writeable(struct device *dev, unsigned int reg) 579 { 580 switch (reg) { 581 case TAS2770_LVE_INT_REG0: 582 case TAS2770_LVE_INT_REG1: 583 case TAS2770_LAT_INT_REG0: 584 case TAS2770_LAT_INT_REG1: 585 case TAS2770_VBAT_MSB: 586 case TAS2770_VBAT_LSB: 587 case TAS2770_TEMP_MSB: 588 case TAS2770_TEMP_LSB: 589 case TAS2770_TDM_CLK_DETC: 590 case TAS2770_REV_AND_GPID: 591 return false; 592 } 593 594 return true; 595 } 596 597 static const struct regmap_range_cfg tas2770_regmap_ranges[] = { 598 { 599 .range_min = 0, 600 .range_max = 1 * 128, 601 .selector_reg = TAS2770_PAGE, 602 .selector_mask = 0xff, 603 .selector_shift = 0, 604 .window_start = 0, 605 .window_len = 128, 606 }, 607 }; 608 609 static const struct regmap_config tas2770_i2c_regmap = { 610 .reg_bits = 8, 611 .val_bits = 8, 612 .writeable_reg = tas2770_writeable, 613 .volatile_reg = tas2770_volatile, 614 .reg_defaults = tas2770_reg_defaults, 615 .num_reg_defaults = ARRAY_SIZE(tas2770_reg_defaults), 616 .cache_type = REGCACHE_RBTREE, 617 .ranges = tas2770_regmap_ranges, 618 .num_ranges = ARRAY_SIZE(tas2770_regmap_ranges), 619 .max_register = 1 * 128, 620 }; 621 622 static int tas2770_parse_dt(struct device *dev, struct tas2770_priv *tas2770) 623 { 624 int rc = 0; 625 626 rc = fwnode_property_read_u32(dev->fwnode, "ti,imon-slot-no", 627 &tas2770->i_sense_slot); 628 if (rc) { 629 dev_info(tas2770->dev, "Property %s is missing setting default slot\n", 630 "ti,imon-slot-no"); 631 632 tas2770->i_sense_slot = 0; 633 } 634 635 rc = fwnode_property_read_u32(dev->fwnode, "ti,vmon-slot-no", 636 &tas2770->v_sense_slot); 637 if (rc) { 638 dev_info(tas2770->dev, "Property %s is missing setting default slot\n", 639 "ti,vmon-slot-no"); 640 641 tas2770->v_sense_slot = 2; 642 } 643 644 tas2770->sdz_gpio = devm_gpiod_get_optional(dev, "shutdown", GPIOD_OUT_HIGH); 645 if (IS_ERR(tas2770->sdz_gpio)) { 646 if (PTR_ERR(tas2770->sdz_gpio) == -EPROBE_DEFER) 647 return -EPROBE_DEFER; 648 649 tas2770->sdz_gpio = NULL; 650 } 651 652 return 0; 653 } 654 655 static int tas2770_i2c_probe(struct i2c_client *client) 656 { 657 struct tas2770_priv *tas2770; 658 int result; 659 660 tas2770 = devm_kzalloc(&client->dev, sizeof(struct tas2770_priv), 661 GFP_KERNEL); 662 if (!tas2770) 663 return -ENOMEM; 664 665 tas2770->dev = &client->dev; 666 i2c_set_clientdata(client, tas2770); 667 dev_set_drvdata(&client->dev, tas2770); 668 669 tas2770->regmap = devm_regmap_init_i2c(client, &tas2770_i2c_regmap); 670 if (IS_ERR(tas2770->regmap)) { 671 result = PTR_ERR(tas2770->regmap); 672 dev_err(&client->dev, "Failed to allocate register map: %d\n", 673 result); 674 return result; 675 } 676 677 if (client->dev.of_node) { 678 result = tas2770_parse_dt(&client->dev, tas2770); 679 if (result) { 680 dev_err(tas2770->dev, "%s: Failed to parse devicetree\n", 681 __func__); 682 return result; 683 } 684 } 685 686 tas2770->reset_gpio = devm_gpiod_get_optional(tas2770->dev, "reset", 687 GPIOD_OUT_HIGH); 688 if (IS_ERR(tas2770->reset_gpio)) { 689 if (PTR_ERR(tas2770->reset_gpio) == -EPROBE_DEFER) { 690 tas2770->reset_gpio = NULL; 691 return -EPROBE_DEFER; 692 } 693 } 694 695 result = tas2770_register_codec(tas2770); 696 if (result) 697 dev_err(tas2770->dev, "Register codec failed.\n"); 698 699 return result; 700 } 701 702 static const struct i2c_device_id tas2770_i2c_id[] = { 703 { "tas2770"}, 704 { } 705 }; 706 MODULE_DEVICE_TABLE(i2c, tas2770_i2c_id); 707 708 #if defined(CONFIG_OF) 709 static const struct of_device_id tas2770_of_match[] = { 710 { .compatible = "ti,tas2770" }, 711 {}, 712 }; 713 MODULE_DEVICE_TABLE(of, tas2770_of_match); 714 #endif 715 716 static struct i2c_driver tas2770_i2c_driver = { 717 .driver = { 718 .name = "tas2770", 719 .of_match_table = of_match_ptr(tas2770_of_match), 720 }, 721 .probe = tas2770_i2c_probe, 722 .id_table = tas2770_i2c_id, 723 }; 724 module_i2c_driver(tas2770_i2c_driver); 725 726 MODULE_AUTHOR("Shi Fu <shifu0704@thundersoft.com>"); 727 MODULE_DESCRIPTION("TAS2770 I2C Smart Amplifier driver"); 728 MODULE_LICENSE("GPL v2"); 729