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/of_gpio.h> 24 #include <linux/slab.h> 25 #include <sound/soc.h> 26 #include <sound/pcm.h> 27 #include <sound/pcm_params.h> 28 #include <sound/initval.h> 29 #include <sound/tlv.h> 30 31 #include "tas2770.h" 32 33 #define TAS2770_MDELAY 0xFFFFFFFE 34 35 static void tas2770_reset(struct tas2770_priv *tas2770) 36 { 37 if (tas2770->reset_gpio) { 38 gpiod_set_value_cansleep(tas2770->reset_gpio, 0); 39 msleep(20); 40 gpiod_set_value_cansleep(tas2770->reset_gpio, 1); 41 usleep_range(1000, 2000); 42 } 43 44 snd_soc_component_write(tas2770->component, TAS2770_SW_RST, 45 TAS2770_RST); 46 usleep_range(1000, 2000); 47 } 48 49 static int tas2770_update_pwr_ctrl(struct tas2770_priv *tas2770) 50 { 51 struct snd_soc_component *component = tas2770->component; 52 unsigned int val; 53 int ret; 54 55 if (tas2770->dac_powered) 56 val = tas2770->unmuted ? 57 TAS2770_PWR_CTRL_ACTIVE : TAS2770_PWR_CTRL_MUTE; 58 else 59 val = TAS2770_PWR_CTRL_SHUTDOWN; 60 61 ret = snd_soc_component_update_bits(component, TAS2770_PWR_CTRL, 62 TAS2770_PWR_CTRL_MASK, val); 63 if (ret < 0) 64 return ret; 65 66 return 0; 67 } 68 69 #ifdef CONFIG_PM 70 static int tas2770_codec_suspend(struct snd_soc_component *component) 71 { 72 struct tas2770_priv *tas2770 = snd_soc_component_get_drvdata(component); 73 int ret = 0; 74 75 regcache_cache_only(tas2770->regmap, true); 76 regcache_mark_dirty(tas2770->regmap); 77 78 if (tas2770->sdz_gpio) { 79 gpiod_set_value_cansleep(tas2770->sdz_gpio, 0); 80 } else { 81 ret = snd_soc_component_update_bits(component, TAS2770_PWR_CTRL, 82 TAS2770_PWR_CTRL_MASK, 83 TAS2770_PWR_CTRL_SHUTDOWN); 84 if (ret < 0) { 85 regcache_cache_only(tas2770->regmap, false); 86 regcache_sync(tas2770->regmap); 87 return ret; 88 } 89 90 ret = 0; 91 } 92 93 return ret; 94 } 95 96 static int tas2770_codec_resume(struct snd_soc_component *component) 97 { 98 struct tas2770_priv *tas2770 = snd_soc_component_get_drvdata(component); 99 int ret; 100 101 if (tas2770->sdz_gpio) { 102 gpiod_set_value_cansleep(tas2770->sdz_gpio, 1); 103 usleep_range(1000, 2000); 104 } else { 105 ret = tas2770_update_pwr_ctrl(tas2770); 106 if (ret < 0) 107 return ret; 108 } 109 110 regcache_cache_only(tas2770->regmap, false); 111 112 return regcache_sync(tas2770->regmap); 113 } 114 #else 115 #define tas2770_codec_suspend NULL 116 #define tas2770_codec_resume NULL 117 #endif 118 119 static const char * const tas2770_ASI1_src[] = { 120 "I2C offset", "Left", "Right", "LeftRightDiv2", 121 }; 122 123 static SOC_ENUM_SINGLE_DECL( 124 tas2770_ASI1_src_enum, TAS2770_TDM_CFG_REG2, 125 4, tas2770_ASI1_src); 126 127 static const struct snd_kcontrol_new tas2770_asi1_mux = 128 SOC_DAPM_ENUM("ASI1 Source", tas2770_ASI1_src_enum); 129 130 static int tas2770_dac_event(struct snd_soc_dapm_widget *w, 131 struct snd_kcontrol *kcontrol, int event) 132 { 133 struct snd_soc_component *component = 134 snd_soc_dapm_to_component(w->dapm); 135 struct tas2770_priv *tas2770 = 136 snd_soc_component_get_drvdata(component); 137 int ret; 138 139 switch (event) { 140 case SND_SOC_DAPM_POST_PMU: 141 tas2770->dac_powered = 1; 142 ret = tas2770_update_pwr_ctrl(tas2770); 143 break; 144 case SND_SOC_DAPM_PRE_PMD: 145 tas2770->dac_powered = 0; 146 ret = tas2770_update_pwr_ctrl(tas2770); 147 break; 148 default: 149 dev_err(tas2770->dev, "Not supported evevt\n"); 150 return -EINVAL; 151 } 152 153 return ret; 154 } 155 156 static const struct snd_kcontrol_new isense_switch = 157 SOC_DAPM_SINGLE("Switch", TAS2770_PWR_CTRL, 3, 1, 1); 158 static const struct snd_kcontrol_new vsense_switch = 159 SOC_DAPM_SINGLE("Switch", TAS2770_PWR_CTRL, 2, 1, 1); 160 161 static const struct snd_soc_dapm_widget tas2770_dapm_widgets[] = { 162 SND_SOC_DAPM_AIF_IN("ASI1", "ASI1 Playback", 0, SND_SOC_NOPM, 0, 0), 163 SND_SOC_DAPM_MUX("ASI1 Sel", SND_SOC_NOPM, 0, 0, &tas2770_asi1_mux), 164 SND_SOC_DAPM_SWITCH("ISENSE", TAS2770_PWR_CTRL, 3, 1, &isense_switch), 165 SND_SOC_DAPM_SWITCH("VSENSE", TAS2770_PWR_CTRL, 2, 1, &vsense_switch), 166 SND_SOC_DAPM_DAC_E("DAC", NULL, SND_SOC_NOPM, 0, 0, tas2770_dac_event, 167 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD), 168 SND_SOC_DAPM_OUTPUT("OUT"), 169 SND_SOC_DAPM_SIGGEN("VMON"), 170 SND_SOC_DAPM_SIGGEN("IMON") 171 }; 172 173 static const struct snd_soc_dapm_route tas2770_audio_map[] = { 174 {"ASI1 Sel", "I2C offset", "ASI1"}, 175 {"ASI1 Sel", "Left", "ASI1"}, 176 {"ASI1 Sel", "Right", "ASI1"}, 177 {"ASI1 Sel", "LeftRightDiv2", "ASI1"}, 178 {"DAC", NULL, "ASI1 Sel"}, 179 {"OUT", NULL, "DAC"}, 180 {"ISENSE", "Switch", "IMON"}, 181 {"VSENSE", "Switch", "VMON"}, 182 }; 183 184 static int tas2770_mute(struct snd_soc_dai *dai, int mute, int direction) 185 { 186 struct snd_soc_component *component = dai->component; 187 struct tas2770_priv *tas2770 = 188 snd_soc_component_get_drvdata(component); 189 190 tas2770->unmuted = !mute; 191 return tas2770_update_pwr_ctrl(tas2770); 192 } 193 194 static int tas2770_set_bitwidth(struct tas2770_priv *tas2770, int bitwidth) 195 { 196 int ret; 197 struct snd_soc_component *component = tas2770->component; 198 199 switch (bitwidth) { 200 case SNDRV_PCM_FORMAT_S16_LE: 201 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2, 202 TAS2770_TDM_CFG_REG2_RXW_MASK, 203 TAS2770_TDM_CFG_REG2_RXW_16BITS); 204 tas2770->v_sense_slot = tas2770->i_sense_slot + 2; 205 break; 206 case SNDRV_PCM_FORMAT_S24_LE: 207 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2, 208 TAS2770_TDM_CFG_REG2_RXW_MASK, 209 TAS2770_TDM_CFG_REG2_RXW_24BITS); 210 tas2770->v_sense_slot = tas2770->i_sense_slot + 4; 211 break; 212 case SNDRV_PCM_FORMAT_S32_LE: 213 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2, 214 TAS2770_TDM_CFG_REG2_RXW_MASK, 215 TAS2770_TDM_CFG_REG2_RXW_32BITS); 216 tas2770->v_sense_slot = tas2770->i_sense_slot + 4; 217 break; 218 219 default: 220 return -EINVAL; 221 } 222 223 if (ret < 0) 224 return ret; 225 226 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG5, 227 TAS2770_TDM_CFG_REG5_VSNS_MASK | 228 TAS2770_TDM_CFG_REG5_50_MASK, 229 TAS2770_TDM_CFG_REG5_VSNS_ENABLE | 230 tas2770->v_sense_slot); 231 if (ret < 0) 232 return ret; 233 234 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG6, 235 TAS2770_TDM_CFG_REG6_ISNS_MASK | 236 TAS2770_TDM_CFG_REG6_50_MASK, 237 TAS2770_TDM_CFG_REG6_ISNS_ENABLE | 238 tas2770->i_sense_slot); 239 if (ret < 0) 240 return ret; 241 242 return 0; 243 } 244 245 static int tas2770_set_samplerate(struct tas2770_priv *tas2770, int samplerate) 246 { 247 struct snd_soc_component *component = tas2770->component; 248 int ramp_rate_val; 249 int ret; 250 251 switch (samplerate) { 252 case 48000: 253 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_48KHZ | 254 TAS2770_TDM_CFG_REG0_31_44_1_48KHZ; 255 break; 256 case 44100: 257 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_44_1KHZ | 258 TAS2770_TDM_CFG_REG0_31_44_1_48KHZ; 259 break; 260 case 96000: 261 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_48KHZ | 262 TAS2770_TDM_CFG_REG0_31_88_2_96KHZ; 263 break; 264 case 88200: 265 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_44_1KHZ | 266 TAS2770_TDM_CFG_REG0_31_88_2_96KHZ; 267 break; 268 case 192000: 269 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_48KHZ | 270 TAS2770_TDM_CFG_REG0_31_176_4_192KHZ; 271 break; 272 case 176400: 273 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_44_1KHZ | 274 TAS2770_TDM_CFG_REG0_31_176_4_192KHZ; 275 break; 276 default: 277 return -EINVAL; 278 } 279 280 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG0, 281 TAS2770_TDM_CFG_REG0_SMP_MASK | 282 TAS2770_TDM_CFG_REG0_31_MASK, 283 ramp_rate_val); 284 if (ret < 0) 285 return ret; 286 287 return 0; 288 } 289 290 static int tas2770_hw_params(struct snd_pcm_substream *substream, 291 struct snd_pcm_hw_params *params, 292 struct snd_soc_dai *dai) 293 { 294 struct snd_soc_component *component = dai->component; 295 struct tas2770_priv *tas2770 = 296 snd_soc_component_get_drvdata(component); 297 int ret; 298 299 ret = tas2770_set_bitwidth(tas2770, params_format(params)); 300 if (ret) 301 return ret; 302 303 return tas2770_set_samplerate(tas2770, params_rate(params)); 304 } 305 306 static int tas2770_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) 307 { 308 struct snd_soc_component *component = dai->component; 309 struct tas2770_priv *tas2770 = 310 snd_soc_component_get_drvdata(component); 311 u8 tdm_rx_start_slot = 0, invert_fpol = 0, fpol_preinv = 0, asi_cfg_1 = 0; 312 int ret; 313 314 switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) { 315 case SND_SOC_DAIFMT_CBC_CFC: 316 break; 317 default: 318 dev_err(tas2770->dev, "ASI invalid DAI clocking\n"); 319 return -EINVAL; 320 } 321 322 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 323 case SND_SOC_DAIFMT_NB_IF: 324 invert_fpol = 1; 325 fallthrough; 326 case SND_SOC_DAIFMT_NB_NF: 327 asi_cfg_1 |= TAS2770_TDM_CFG_REG1_RX_RSING; 328 break; 329 case SND_SOC_DAIFMT_IB_IF: 330 invert_fpol = 1; 331 fallthrough; 332 case SND_SOC_DAIFMT_IB_NF: 333 asi_cfg_1 |= TAS2770_TDM_CFG_REG1_RX_FALING; 334 break; 335 default: 336 dev_err(tas2770->dev, "ASI format Inverse is not found\n"); 337 return -EINVAL; 338 } 339 340 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG1, 341 TAS2770_TDM_CFG_REG1_RX_MASK, 342 asi_cfg_1); 343 if (ret < 0) 344 return ret; 345 346 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 347 case SND_SOC_DAIFMT_I2S: 348 tdm_rx_start_slot = 1; 349 fpol_preinv = 0; 350 break; 351 case SND_SOC_DAIFMT_DSP_A: 352 tdm_rx_start_slot = 0; 353 fpol_preinv = 1; 354 break; 355 case SND_SOC_DAIFMT_DSP_B: 356 tdm_rx_start_slot = 1; 357 fpol_preinv = 1; 358 break; 359 case SND_SOC_DAIFMT_LEFT_J: 360 tdm_rx_start_slot = 0; 361 fpol_preinv = 1; 362 break; 363 default: 364 dev_err(tas2770->dev, 365 "DAI Format is not found, fmt=0x%x\n", fmt); 366 return -EINVAL; 367 } 368 369 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG1, 370 TAS2770_TDM_CFG_REG1_MASK, 371 (tdm_rx_start_slot << TAS2770_TDM_CFG_REG1_51_SHIFT)); 372 if (ret < 0) 373 return ret; 374 375 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG0, 376 TAS2770_TDM_CFG_REG0_FPOL_MASK, 377 (fpol_preinv ^ invert_fpol) 378 ? TAS2770_TDM_CFG_REG0_FPOL_RSING 379 : TAS2770_TDM_CFG_REG0_FPOL_FALING); 380 if (ret < 0) 381 return ret; 382 383 return 0; 384 } 385 386 static int tas2770_set_dai_tdm_slot(struct snd_soc_dai *dai, 387 unsigned int tx_mask, 388 unsigned int rx_mask, 389 int slots, int slot_width) 390 { 391 struct snd_soc_component *component = dai->component; 392 int left_slot, right_slot; 393 int ret; 394 395 if (tx_mask == 0 || rx_mask != 0) 396 return -EINVAL; 397 398 left_slot = __ffs(tx_mask); 399 tx_mask &= ~(1 << left_slot); 400 if (tx_mask == 0) { 401 right_slot = left_slot; 402 } else { 403 right_slot = __ffs(tx_mask); 404 tx_mask &= ~(1 << right_slot); 405 } 406 407 if (tx_mask != 0 || left_slot >= slots || right_slot >= slots) 408 return -EINVAL; 409 410 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG3, 411 TAS2770_TDM_CFG_REG3_30_MASK, 412 (left_slot << TAS2770_TDM_CFG_REG3_30_SHIFT)); 413 if (ret < 0) 414 return ret; 415 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG3, 416 TAS2770_TDM_CFG_REG3_RXS_MASK, 417 (right_slot << TAS2770_TDM_CFG_REG3_RXS_SHIFT)); 418 if (ret < 0) 419 return ret; 420 421 switch (slot_width) { 422 case 16: 423 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2, 424 TAS2770_TDM_CFG_REG2_RXS_MASK, 425 TAS2770_TDM_CFG_REG2_RXS_16BITS); 426 break; 427 case 24: 428 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2, 429 TAS2770_TDM_CFG_REG2_RXS_MASK, 430 TAS2770_TDM_CFG_REG2_RXS_24BITS); 431 break; 432 case 32: 433 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2, 434 TAS2770_TDM_CFG_REG2_RXS_MASK, 435 TAS2770_TDM_CFG_REG2_RXS_32BITS); 436 break; 437 case 0: 438 /* Do not change slot width */ 439 ret = 0; 440 break; 441 default: 442 ret = -EINVAL; 443 } 444 445 if (ret < 0) 446 return ret; 447 448 return 0; 449 } 450 451 static const struct snd_soc_dai_ops tas2770_dai_ops = { 452 .mute_stream = tas2770_mute, 453 .hw_params = tas2770_hw_params, 454 .set_fmt = tas2770_set_fmt, 455 .set_tdm_slot = tas2770_set_dai_tdm_slot, 456 .no_capture_mute = 1, 457 }; 458 459 #define TAS2770_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ 460 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE) 461 462 #define TAS2770_RATES (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |\ 463 SNDRV_PCM_RATE_96000 |\ 464 SNDRV_PCM_RATE_192000\ 465 ) 466 467 static struct snd_soc_dai_driver tas2770_dai_driver[] = { 468 { 469 .name = "tas2770 ASI1", 470 .id = 0, 471 .playback = { 472 .stream_name = "ASI1 Playback", 473 .channels_min = 1, 474 .channels_max = 2, 475 .rates = TAS2770_RATES, 476 .formats = TAS2770_FORMATS, 477 }, 478 .capture = { 479 .stream_name = "ASI1 Capture", 480 .channels_min = 0, 481 .channels_max = 2, 482 .rates = TAS2770_RATES, 483 .formats = TAS2770_FORMATS, 484 }, 485 .ops = &tas2770_dai_ops, 486 .symmetric_rate = 1, 487 }, 488 }; 489 490 static const struct regmap_config tas2770_i2c_regmap; 491 492 static int tas2770_codec_probe(struct snd_soc_component *component) 493 { 494 struct tas2770_priv *tas2770 = 495 snd_soc_component_get_drvdata(component); 496 497 tas2770->component = component; 498 499 if (tas2770->sdz_gpio) { 500 gpiod_set_value_cansleep(tas2770->sdz_gpio, 1); 501 usleep_range(1000, 2000); 502 } 503 504 tas2770_reset(tas2770); 505 regmap_reinit_cache(tas2770->regmap, &tas2770_i2c_regmap); 506 507 return 0; 508 } 509 510 static DECLARE_TLV_DB_SCALE(tas2770_digital_tlv, 1100, 50, 0); 511 static DECLARE_TLV_DB_SCALE(tas2770_playback_volume, -12750, 50, 0); 512 513 static const struct snd_kcontrol_new tas2770_snd_controls[] = { 514 SOC_SINGLE_TLV("Speaker Playback Volume", TAS2770_PLAY_CFG_REG2, 515 0, TAS2770_PLAY_CFG_REG2_VMAX, 1, tas2770_playback_volume), 516 SOC_SINGLE_TLV("Amp Gain Volume", TAS2770_PLAY_CFG_REG0, 0, 0x14, 0, 517 tas2770_digital_tlv), 518 }; 519 520 static const struct snd_soc_component_driver soc_component_driver_tas2770 = { 521 .probe = tas2770_codec_probe, 522 .suspend = tas2770_codec_suspend, 523 .resume = tas2770_codec_resume, 524 .controls = tas2770_snd_controls, 525 .num_controls = ARRAY_SIZE(tas2770_snd_controls), 526 .dapm_widgets = tas2770_dapm_widgets, 527 .num_dapm_widgets = ARRAY_SIZE(tas2770_dapm_widgets), 528 .dapm_routes = tas2770_audio_map, 529 .num_dapm_routes = ARRAY_SIZE(tas2770_audio_map), 530 .idle_bias_on = 1, 531 .endianness = 1, 532 }; 533 534 static int tas2770_register_codec(struct tas2770_priv *tas2770) 535 { 536 return devm_snd_soc_register_component(tas2770->dev, 537 &soc_component_driver_tas2770, 538 tas2770_dai_driver, ARRAY_SIZE(tas2770_dai_driver)); 539 } 540 541 static const struct reg_default tas2770_reg_defaults[] = { 542 { TAS2770_PAGE, 0x00 }, 543 { TAS2770_SW_RST, 0x00 }, 544 { TAS2770_PWR_CTRL, 0x0e }, 545 { TAS2770_PLAY_CFG_REG0, 0x10 }, 546 { TAS2770_PLAY_CFG_REG1, 0x01 }, 547 { TAS2770_PLAY_CFG_REG2, 0x00 }, 548 { TAS2770_MSC_CFG_REG0, 0x07 }, 549 { TAS2770_TDM_CFG_REG1, 0x02 }, 550 { TAS2770_TDM_CFG_REG2, 0x0a }, 551 { TAS2770_TDM_CFG_REG3, 0x10 }, 552 { TAS2770_INT_MASK_REG0, 0xfc }, 553 { TAS2770_INT_MASK_REG1, 0xb1 }, 554 { TAS2770_INT_CFG, 0x05 }, 555 { TAS2770_MISC_IRQ, 0x81 }, 556 { TAS2770_CLK_CGF, 0x0c }, 557 558 }; 559 560 static bool tas2770_volatile(struct device *dev, unsigned int reg) 561 { 562 switch (reg) { 563 case TAS2770_PAGE: /* regmap implementation requires this */ 564 case TAS2770_SW_RST: /* always clears after write */ 565 case TAS2770_BO_PRV_REG0:/* has a self clearing bit */ 566 case TAS2770_LVE_INT_REG0: 567 case TAS2770_LVE_INT_REG1: 568 case TAS2770_LAT_INT_REG0:/* Sticky interrupt flags */ 569 case TAS2770_LAT_INT_REG1:/* Sticky interrupt flags */ 570 case TAS2770_VBAT_MSB: 571 case TAS2770_VBAT_LSB: 572 case TAS2770_TEMP_MSB: 573 case TAS2770_TEMP_LSB: 574 return true; 575 } 576 577 return false; 578 } 579 580 static bool tas2770_writeable(struct device *dev, unsigned int reg) 581 { 582 switch (reg) { 583 case TAS2770_LVE_INT_REG0: 584 case TAS2770_LVE_INT_REG1: 585 case TAS2770_LAT_INT_REG0: 586 case TAS2770_LAT_INT_REG1: 587 case TAS2770_VBAT_MSB: 588 case TAS2770_VBAT_LSB: 589 case TAS2770_TEMP_MSB: 590 case TAS2770_TEMP_LSB: 591 case TAS2770_TDM_CLK_DETC: 592 case TAS2770_REV_AND_GPID: 593 return false; 594 } 595 596 return true; 597 } 598 599 static const struct regmap_range_cfg tas2770_regmap_ranges[] = { 600 { 601 .range_min = 0, 602 .range_max = 1 * 128, 603 .selector_reg = TAS2770_PAGE, 604 .selector_mask = 0xff, 605 .selector_shift = 0, 606 .window_start = 0, 607 .window_len = 128, 608 }, 609 }; 610 611 static const struct regmap_config tas2770_i2c_regmap = { 612 .reg_bits = 8, 613 .val_bits = 8, 614 .writeable_reg = tas2770_writeable, 615 .volatile_reg = tas2770_volatile, 616 .reg_defaults = tas2770_reg_defaults, 617 .num_reg_defaults = ARRAY_SIZE(tas2770_reg_defaults), 618 .cache_type = REGCACHE_RBTREE, 619 .ranges = tas2770_regmap_ranges, 620 .num_ranges = ARRAY_SIZE(tas2770_regmap_ranges), 621 .max_register = 1 * 128, 622 }; 623 624 static int tas2770_parse_dt(struct device *dev, struct tas2770_priv *tas2770) 625 { 626 int rc = 0; 627 628 rc = fwnode_property_read_u32(dev->fwnode, "ti,imon-slot-no", 629 &tas2770->i_sense_slot); 630 if (rc) { 631 dev_info(tas2770->dev, "Property %s is missing setting default slot\n", 632 "ti,imon-slot-no"); 633 634 tas2770->i_sense_slot = 0; 635 } 636 637 rc = fwnode_property_read_u32(dev->fwnode, "ti,vmon-slot-no", 638 &tas2770->v_sense_slot); 639 if (rc) { 640 dev_info(tas2770->dev, "Property %s is missing setting default slot\n", 641 "ti,vmon-slot-no"); 642 643 tas2770->v_sense_slot = 2; 644 } 645 646 tas2770->sdz_gpio = devm_gpiod_get_optional(dev, "shutdown", GPIOD_OUT_HIGH); 647 if (IS_ERR(tas2770->sdz_gpio)) { 648 if (PTR_ERR(tas2770->sdz_gpio) == -EPROBE_DEFER) 649 return -EPROBE_DEFER; 650 651 tas2770->sdz_gpio = NULL; 652 } 653 654 return 0; 655 } 656 657 static int tas2770_i2c_probe(struct i2c_client *client) 658 { 659 struct tas2770_priv *tas2770; 660 int result; 661 662 tas2770 = devm_kzalloc(&client->dev, sizeof(struct tas2770_priv), 663 GFP_KERNEL); 664 if (!tas2770) 665 return -ENOMEM; 666 667 tas2770->dev = &client->dev; 668 i2c_set_clientdata(client, tas2770); 669 dev_set_drvdata(&client->dev, tas2770); 670 671 tas2770->regmap = devm_regmap_init_i2c(client, &tas2770_i2c_regmap); 672 if (IS_ERR(tas2770->regmap)) { 673 result = PTR_ERR(tas2770->regmap); 674 dev_err(&client->dev, "Failed to allocate register map: %d\n", 675 result); 676 return result; 677 } 678 679 if (client->dev.of_node) { 680 result = tas2770_parse_dt(&client->dev, tas2770); 681 if (result) { 682 dev_err(tas2770->dev, "%s: Failed to parse devicetree\n", 683 __func__); 684 return result; 685 } 686 } 687 688 tas2770->reset_gpio = devm_gpiod_get_optional(tas2770->dev, "reset", 689 GPIOD_OUT_HIGH); 690 if (IS_ERR(tas2770->reset_gpio)) { 691 if (PTR_ERR(tas2770->reset_gpio) == -EPROBE_DEFER) { 692 tas2770->reset_gpio = NULL; 693 return -EPROBE_DEFER; 694 } 695 } 696 697 result = tas2770_register_codec(tas2770); 698 if (result) 699 dev_err(tas2770->dev, "Register codec failed.\n"); 700 701 return result; 702 } 703 704 static const struct i2c_device_id tas2770_i2c_id[] = { 705 { "tas2770", 0}, 706 { } 707 }; 708 MODULE_DEVICE_TABLE(i2c, tas2770_i2c_id); 709 710 #if defined(CONFIG_OF) 711 static const struct of_device_id tas2770_of_match[] = { 712 { .compatible = "ti,tas2770" }, 713 {}, 714 }; 715 MODULE_DEVICE_TABLE(of, tas2770_of_match); 716 #endif 717 718 static struct i2c_driver tas2770_i2c_driver = { 719 .driver = { 720 .name = "tas2770", 721 .of_match_table = of_match_ptr(tas2770_of_match), 722 }, 723 .probe = tas2770_i2c_probe, 724 .id_table = tas2770_i2c_id, 725 }; 726 module_i2c_driver(tas2770_i2c_driver); 727 728 MODULE_AUTHOR("Shi Fu <shifu0704@thundersoft.com>"); 729 MODULE_DESCRIPTION("TAS2770 I2C Smart Amplifier driver"); 730 MODULE_LICENSE("GPL v2"); 731