1// SPDX-License-Identifier: GPL-2.0 2// 3// rt700.c -- rt700 ALSA SoC audio driver 4// 5// Copyright(c) 2019 Realtek Semiconductor Corp. 6// 7// 8 9#include <linux/module.h> 10#include <linux/moduleparam.h> 11#include <linux/kernel.h> 12#include <linux/init.h> 13#include <linux/delay.h> 14#include <linux/pm_runtime.h> 15#include <linux/pm.h> 16#include <linux/soundwire/sdw.h> 17#include <linux/regmap.h> 18#include <linux/slab.h> 19#include <sound/core.h> 20#include <sound/pcm.h> 21#include <sound/pcm_params.h> 22#include <sound/soc.h> 23#include <sound/soc-dapm.h> 24#include <sound/initval.h> 25#include <sound/tlv.h> 26#include <sound/hda_verbs.h> 27#include <sound/jack.h> 28 29#include "rt700.h" 30 31static int rt700_index_write(struct regmap *regmap, 32 unsigned int reg, unsigned int value) 33{ 34 int ret; 35 unsigned int addr = (RT700_PRIV_INDEX_W_H << 8) | reg; 36 37 ret = regmap_write(regmap, addr, value); 38 if (ret < 0) 39 pr_err("Failed to set private value: %06x <= %04x ret=%d\n", 40 addr, value, ret); 41 42 return ret; 43} 44 45static int rt700_index_read(struct regmap *regmap, 46 unsigned int reg, unsigned int *value) 47{ 48 int ret; 49 unsigned int addr = (RT700_PRIV_INDEX_W_H << 8) | reg; 50 51 *value = 0; 52 ret = regmap_read(regmap, addr, value); 53 if (ret < 0) 54 pr_err("Failed to get private value: %06x => %04x ret=%d\n", 55 addr, *value, ret); 56 57 return ret; 58} 59 60static unsigned int rt700_button_detect(struct rt700_priv *rt700) 61{ 62 unsigned int btn_type = 0, val80, val81; 63 int ret; 64 65 ret = rt700_index_read(rt700->regmap, RT700_IRQ_FLAG_TABLE1, &val80); 66 if (ret < 0) 67 goto read_error; 68 ret = rt700_index_read(rt700->regmap, RT700_IRQ_FLAG_TABLE2, &val81); 69 if (ret < 0) 70 goto read_error; 71 72 val80 &= 0x0381; 73 val81 &= 0xff00; 74 75 switch (val80) { 76 case 0x0200: 77 case 0x0100: 78 case 0x0080: 79 btn_type |= SND_JACK_BTN_0; 80 break; 81 case 0x0001: 82 btn_type |= SND_JACK_BTN_3; 83 break; 84 } 85 switch (val81) { 86 case 0x8000: 87 case 0x4000: 88 case 0x2000: 89 btn_type |= SND_JACK_BTN_1; 90 break; 91 case 0x1000: 92 case 0x0800: 93 case 0x0400: 94 btn_type |= SND_JACK_BTN_2; 95 break; 96 case 0x0200: 97 case 0x0100: 98 btn_type |= SND_JACK_BTN_3; 99 break; 100 } 101read_error: 102 return btn_type; 103} 104 105static int rt700_headset_detect(struct rt700_priv *rt700) 106{ 107 unsigned int buf, loop = 0; 108 int ret; 109 unsigned int jack_status = 0, reg; 110 111 ret = rt700_index_read(rt700->regmap, 112 RT700_COMBO_JACK_AUTO_CTL2, &buf); 113 if (ret < 0) 114 goto io_error; 115 116 while (loop < 500 && 117 (buf & RT700_COMBOJACK_AUTO_DET_STATUS) == 0) { 118 loop++; 119 120 usleep_range(9000, 10000); 121 ret = rt700_index_read(rt700->regmap, 122 RT700_COMBO_JACK_AUTO_CTL2, &buf); 123 if (ret < 0) 124 goto io_error; 125 126 reg = RT700_VERB_GET_PIN_SENSE | RT700_HP_OUT; 127 ret = regmap_read(rt700->regmap, reg, &jack_status); 128 if ((jack_status & (1 << 31)) == 0) 129 goto remove_error; 130 } 131 132 if (loop >= 500) 133 goto to_error; 134 135 if (buf & RT700_COMBOJACK_AUTO_DET_TRS) 136 rt700->jack_type = SND_JACK_HEADPHONE; 137 else if ((buf & RT700_COMBOJACK_AUTO_DET_CTIA) || 138 (buf & RT700_COMBOJACK_AUTO_DET_OMTP)) 139 rt700->jack_type = SND_JACK_HEADSET; 140 141 return 0; 142 143to_error: 144 ret = -ETIMEDOUT; 145 pr_err_ratelimited("Time-out error in %s\n", __func__); 146 return ret; 147io_error: 148 pr_err_ratelimited("IO error in %s, ret %d\n", __func__, ret); 149 return ret; 150remove_error: 151 pr_err_ratelimited("Jack removal in %s\n", __func__); 152 return -ENODEV; 153} 154 155static void rt700_jack_detect_handler(struct work_struct *work) 156{ 157 struct rt700_priv *rt700 = 158 container_of(work, struct rt700_priv, jack_detect_work.work); 159 int btn_type = 0, ret; 160 unsigned int jack_status = 0, reg; 161 162 if (!rt700->hs_jack) 163 return; 164 165 if (!rt700->component->card->instantiated) 166 return; 167 168 reg = RT700_VERB_GET_PIN_SENSE | RT700_HP_OUT; 169 ret = regmap_read(rt700->regmap, reg, &jack_status); 170 if (ret < 0) 171 goto io_error; 172 173 /* pin attached */ 174 if (jack_status & (1 << 31)) { 175 /* jack in */ 176 if (rt700->jack_type == 0) { 177 ret = rt700_headset_detect(rt700); 178 if (ret < 0) 179 return; 180 if (rt700->jack_type == SND_JACK_HEADSET) 181 btn_type = rt700_button_detect(rt700); 182 } else if (rt700->jack_type == SND_JACK_HEADSET) { 183 /* jack is already in, report button event */ 184 btn_type = rt700_button_detect(rt700); 185 } 186 } else { 187 /* jack out */ 188 rt700->jack_type = 0; 189 } 190 191 dev_dbg(&rt700->slave->dev, 192 "in %s, jack_type=0x%x\n", __func__, rt700->jack_type); 193 dev_dbg(&rt700->slave->dev, 194 "in %s, btn_type=0x%x\n", __func__, btn_type); 195 196 snd_soc_jack_report(rt700->hs_jack, rt700->jack_type | btn_type, 197 SND_JACK_HEADSET | 198 SND_JACK_BTN_0 | SND_JACK_BTN_1 | 199 SND_JACK_BTN_2 | SND_JACK_BTN_3); 200 201 if (btn_type) { 202 /* button released */ 203 snd_soc_jack_report(rt700->hs_jack, rt700->jack_type, 204 SND_JACK_HEADSET | 205 SND_JACK_BTN_0 | SND_JACK_BTN_1 | 206 SND_JACK_BTN_2 | SND_JACK_BTN_3); 207 208 mod_delayed_work(system_power_efficient_wq, 209 &rt700->jack_btn_check_work, msecs_to_jiffies(200)); 210 } 211 212 return; 213 214io_error: 215 pr_err_ratelimited("IO error in %s, ret %d\n", __func__, ret); 216} 217 218static void rt700_btn_check_handler(struct work_struct *work) 219{ 220 struct rt700_priv *rt700 = container_of(work, struct rt700_priv, 221 jack_btn_check_work.work); 222 int btn_type = 0, ret; 223 unsigned int jack_status = 0, reg; 224 225 reg = RT700_VERB_GET_PIN_SENSE | RT700_HP_OUT; 226 ret = regmap_read(rt700->regmap, reg, &jack_status); 227 if (ret < 0) 228 goto io_error; 229 230 /* pin attached */ 231 if (jack_status & (1 << 31)) { 232 if (rt700->jack_type == SND_JACK_HEADSET) { 233 /* jack is already in, report button event */ 234 btn_type = rt700_button_detect(rt700); 235 } 236 } else { 237 rt700->jack_type = 0; 238 } 239 240 /* cbj comparator */ 241 ret = rt700_index_read(rt700->regmap, RT700_COMBO_JACK_AUTO_CTL2, ®); 242 if (ret < 0) 243 goto io_error; 244 245 if ((reg & 0xf0) == 0xf0) 246 btn_type = 0; 247 248 dev_dbg(&rt700->slave->dev, 249 "%s, btn_type=0x%x\n", __func__, btn_type); 250 snd_soc_jack_report(rt700->hs_jack, rt700->jack_type | btn_type, 251 SND_JACK_HEADSET | 252 SND_JACK_BTN_0 | SND_JACK_BTN_1 | 253 SND_JACK_BTN_2 | SND_JACK_BTN_3); 254 255 if (btn_type) { 256 /* button released */ 257 snd_soc_jack_report(rt700->hs_jack, rt700->jack_type, 258 SND_JACK_HEADSET | 259 SND_JACK_BTN_0 | SND_JACK_BTN_1 | 260 SND_JACK_BTN_2 | SND_JACK_BTN_3); 261 262 mod_delayed_work(system_power_efficient_wq, 263 &rt700->jack_btn_check_work, msecs_to_jiffies(200)); 264 } 265 266 return; 267 268io_error: 269 pr_err_ratelimited("IO error in %s, ret %d\n", __func__, ret); 270} 271 272static void rt700_jack_init(struct rt700_priv *rt700) 273{ 274 struct snd_soc_dapm_context *dapm = 275 snd_soc_component_get_dapm(rt700->component); 276 277 /* power on */ 278 if (dapm->bias_level <= SND_SOC_BIAS_STANDBY) 279 regmap_write(rt700->regmap, 280 RT700_SET_AUDIO_POWER_STATE, AC_PWRST_D0); 281 282 if (rt700->hs_jack) { 283 /* Enable Jack Detection */ 284 regmap_write(rt700->regmap, 285 RT700_SET_MIC2_UNSOLICITED_ENABLE, 0x82); 286 regmap_write(rt700->regmap, 287 RT700_SET_HP_UNSOLICITED_ENABLE, 0x81); 288 regmap_write(rt700->regmap, 289 RT700_SET_INLINE_UNSOLICITED_ENABLE, 0x83); 290 rt700_index_write(rt700->regmap, 0x10, 0x2420); 291 rt700_index_write(rt700->regmap, 0x19, 0x2e11); 292 293 dev_dbg(&rt700->slave->dev, "in %s enable\n", __func__); 294 295 mod_delayed_work(system_power_efficient_wq, 296 &rt700->jack_detect_work, msecs_to_jiffies(250)); 297 } else { 298 regmap_write(rt700->regmap, 299 RT700_SET_MIC2_UNSOLICITED_ENABLE, 0x00); 300 regmap_write(rt700->regmap, 301 RT700_SET_HP_UNSOLICITED_ENABLE, 0x00); 302 regmap_write(rt700->regmap, 303 RT700_SET_INLINE_UNSOLICITED_ENABLE, 0x00); 304 305 dev_dbg(&rt700->slave->dev, "in %s disable\n", __func__); 306 } 307 308 /* power off */ 309 if (dapm->bias_level <= SND_SOC_BIAS_STANDBY) 310 regmap_write(rt700->regmap, 311 RT700_SET_AUDIO_POWER_STATE, AC_PWRST_D3); 312} 313 314static int rt700_set_jack_detect(struct snd_soc_component *component, 315 struct snd_soc_jack *hs_jack, void *data) 316{ 317 struct rt700_priv *rt700 = snd_soc_component_get_drvdata(component); 318 319 rt700->hs_jack = hs_jack; 320 321 if (!rt700->hw_init) { 322 dev_dbg(&rt700->slave->dev, 323 "%s hw_init not ready yet\n", __func__); 324 return 0; 325 } 326 327 rt700_jack_init(rt700); 328 329 return 0; 330} 331 332static void rt700_get_gain(struct rt700_priv *rt700, unsigned int addr_h, 333 unsigned int addr_l, unsigned int val_h, 334 unsigned int *r_val, unsigned int *l_val) 335{ 336 /* R Channel */ 337 *r_val = (val_h << 8); 338 regmap_read(rt700->regmap, addr_l, r_val); 339 340 /* L Channel */ 341 val_h |= 0x20; 342 *l_val = (val_h << 8); 343 regmap_read(rt700->regmap, addr_h, l_val); 344} 345 346/* For Verb-Set Amplifier Gain (Verb ID = 3h) */ 347static int rt700_set_amp_gain_put(struct snd_kcontrol *kcontrol, 348 struct snd_ctl_elem_value *ucontrol) 349{ 350 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol); 351 struct snd_soc_dapm_context *dapm = 352 snd_soc_component_get_dapm(component); 353 struct soc_mixer_control *mc = 354 (struct soc_mixer_control *)kcontrol->private_value; 355 struct rt700_priv *rt700 = snd_soc_component_get_drvdata(component); 356 unsigned int addr_h, addr_l, val_h, val_ll, val_lr; 357 unsigned int read_ll, read_rl; 358 int i; 359 360 /* Can't use update bit function, so read the original value first */ 361 addr_h = mc->reg; 362 addr_l = mc->rreg; 363 if (mc->shift == RT700_DIR_OUT_SFT) /* output */ 364 val_h = 0x80; 365 else /* input */ 366 val_h = 0x0; 367 368 rt700_get_gain(rt700, addr_h, addr_l, val_h, &read_rl, &read_ll); 369 370 /* L Channel */ 371 if (mc->invert) { 372 /* for mute */ 373 val_ll = (mc->max - ucontrol->value.integer.value[0]) << 7; 374 /* keep gain */ 375 read_ll = read_ll & 0x7f; 376 val_ll |= read_ll; 377 } else { 378 /* for gain */ 379 val_ll = ((ucontrol->value.integer.value[0]) & 0x7f); 380 if (val_ll > mc->max) 381 val_ll = mc->max; 382 /* keep mute status */ 383 read_ll = read_ll & 0x80; 384 val_ll |= read_ll; 385 } 386 387 if (dapm->bias_level <= SND_SOC_BIAS_STANDBY) 388 regmap_write(rt700->regmap, 389 RT700_SET_AUDIO_POWER_STATE, AC_PWRST_D0); 390 391 /* R Channel */ 392 if (mc->invert) { 393 /* for mute */ 394 val_lr = (mc->max - ucontrol->value.integer.value[1]) << 7; 395 /* keep gain */ 396 read_rl = read_rl & 0x7f; 397 val_lr |= read_rl; 398 } else { 399 /* for gain */ 400 val_lr = ((ucontrol->value.integer.value[1]) & 0x7f); 401 if (val_lr > mc->max) 402 val_lr = mc->max; 403 /* keep mute status */ 404 read_rl = read_rl & 0x80; 405 val_lr |= read_rl; 406 } 407 408 for (i = 0; i < 3; i++) { /* retry 3 times at most */ 409 if (val_ll == val_lr) { 410 /* Set both L/R channels at the same time */ 411 val_h = (1 << mc->shift) | (3 << 4); 412 regmap_write(rt700->regmap, 413 addr_h, (val_h << 8 | val_ll)); 414 regmap_write(rt700->regmap, 415 addr_l, (val_h << 8 | val_ll)); 416 } else { 417 /* Lch*/ 418 val_h = (1 << mc->shift) | (1 << 5); 419 regmap_write(rt700->regmap, 420 addr_h, (val_h << 8 | val_ll)); 421 422 /* Rch */ 423 val_h = (1 << mc->shift) | (1 << 4); 424 regmap_write(rt700->regmap, 425 addr_l, (val_h << 8 | val_lr)); 426 } 427 /* check result */ 428 if (mc->shift == RT700_DIR_OUT_SFT) /* output */ 429 val_h = 0x80; 430 else /* input */ 431 val_h = 0x0; 432 433 rt700_get_gain(rt700, addr_h, addr_l, val_h, 434 &read_rl, &read_ll); 435 if (read_rl == val_lr && read_ll == val_ll) 436 break; 437 } 438 439 if (dapm->bias_level <= SND_SOC_BIAS_STANDBY) 440 regmap_write(rt700->regmap, 441 RT700_SET_AUDIO_POWER_STATE, AC_PWRST_D3); 442 return 0; 443} 444 445static int rt700_set_amp_gain_get(struct snd_kcontrol *kcontrol, 446 struct snd_ctl_elem_value *ucontrol) 447{ 448 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol); 449 struct rt700_priv *rt700 = snd_soc_component_get_drvdata(component); 450 struct soc_mixer_control *mc = 451 (struct soc_mixer_control *)kcontrol->private_value; 452 unsigned int addr_h, addr_l, val_h; 453 unsigned int read_ll, read_rl; 454 455 addr_h = mc->reg; 456 addr_l = mc->rreg; 457 if (mc->shift == RT700_DIR_OUT_SFT) /* output */ 458 val_h = 0x80; 459 else /* input */ 460 val_h = 0x0; 461 462 rt700_get_gain(rt700, addr_h, addr_l, val_h, &read_rl, &read_ll); 463 464 if (mc->invert) { 465 /* for mute status */ 466 read_ll = !((read_ll & 0x80) >> RT700_MUTE_SFT); 467 read_rl = !((read_rl & 0x80) >> RT700_MUTE_SFT); 468 } else { 469 /* for gain */ 470 read_ll = read_ll & 0x7f; 471 read_rl = read_rl & 0x7f; 472 } 473 ucontrol->value.integer.value[0] = read_ll; 474 ucontrol->value.integer.value[1] = read_rl; 475 476 return 0; 477} 478 479static const DECLARE_TLV_DB_SCALE(out_vol_tlv, -6525, 75, 0); 480static const DECLARE_TLV_DB_SCALE(in_vol_tlv, -1725, 75, 0); 481static const DECLARE_TLV_DB_SCALE(mic_vol_tlv, 0, 1000, 0); 482 483static const struct snd_kcontrol_new rt700_snd_controls[] = { 484 SOC_DOUBLE_R_EXT_TLV("DAC Front Playback Volume", 485 RT700_SET_GAIN_DAC1_H, RT700_SET_GAIN_DAC1_L, 486 RT700_DIR_OUT_SFT, 0x57, 0, 487 rt700_set_amp_gain_get, rt700_set_amp_gain_put, out_vol_tlv), 488 SOC_DOUBLE_R_EXT("ADC 08 Capture Switch", 489 RT700_SET_GAIN_ADC2_H, RT700_SET_GAIN_ADC2_L, 490 RT700_DIR_IN_SFT, 1, 1, 491 rt700_set_amp_gain_get, rt700_set_amp_gain_put), 492 SOC_DOUBLE_R_EXT("ADC 09 Capture Switch", 493 RT700_SET_GAIN_ADC1_H, RT700_SET_GAIN_ADC1_L, 494 RT700_DIR_IN_SFT, 1, 1, 495 rt700_set_amp_gain_get, rt700_set_amp_gain_put), 496 SOC_DOUBLE_R_EXT_TLV("ADC 08 Capture Volume", 497 RT700_SET_GAIN_ADC2_H, RT700_SET_GAIN_ADC2_L, 498 RT700_DIR_IN_SFT, 0x3f, 0, 499 rt700_set_amp_gain_get, rt700_set_amp_gain_put, in_vol_tlv), 500 SOC_DOUBLE_R_EXT_TLV("ADC 09 Capture Volume", 501 RT700_SET_GAIN_ADC1_H, RT700_SET_GAIN_ADC1_L, 502 RT700_DIR_IN_SFT, 0x3f, 0, 503 rt700_set_amp_gain_get, rt700_set_amp_gain_put, in_vol_tlv), 504 SOC_DOUBLE_R_EXT_TLV("AMIC Volume", 505 RT700_SET_GAIN_AMIC_H, RT700_SET_GAIN_AMIC_L, 506 RT700_DIR_IN_SFT, 3, 0, 507 rt700_set_amp_gain_get, rt700_set_amp_gain_put, mic_vol_tlv), 508}; 509 510static int rt700_mux_get(struct snd_kcontrol *kcontrol, 511 struct snd_ctl_elem_value *ucontrol) 512{ 513 struct snd_soc_component *component = 514 snd_soc_dapm_kcontrol_component(kcontrol); 515 struct rt700_priv *rt700 = snd_soc_component_get_drvdata(component); 516 unsigned int reg, val = 0, nid; 517 int ret; 518 519 if (strstr(ucontrol->id.name, "HPO Mux")) 520 nid = RT700_HP_OUT; 521 else if (strstr(ucontrol->id.name, "ADC 22 Mux")) 522 nid = RT700_MIXER_IN1; 523 else if (strstr(ucontrol->id.name, "ADC 23 Mux")) 524 nid = RT700_MIXER_IN2; 525 else 526 return -EINVAL; 527 528 /* vid = 0xf01 */ 529 reg = RT700_VERB_SET_CONNECT_SEL | nid; 530 ret = regmap_read(rt700->regmap, reg, &val); 531 if (ret < 0) 532 return ret; 533 534 ucontrol->value.enumerated.item[0] = val; 535 536 return 0; 537} 538 539static int rt700_mux_put(struct snd_kcontrol *kcontrol, 540 struct snd_ctl_elem_value *ucontrol) 541{ 542 struct snd_soc_component *component = 543 snd_soc_dapm_kcontrol_component(kcontrol); 544 struct snd_soc_dapm_context *dapm = 545 snd_soc_dapm_kcontrol_dapm(kcontrol); 546 struct rt700_priv *rt700 = snd_soc_component_get_drvdata(component); 547 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value; 548 unsigned int *item = ucontrol->value.enumerated.item; 549 unsigned int val, val2 = 0, change, reg, nid; 550 int ret; 551 552 if (item[0] >= e->items) 553 return -EINVAL; 554 555 if (strstr(ucontrol->id.name, "HPO Mux")) 556 nid = RT700_HP_OUT; 557 else if (strstr(ucontrol->id.name, "ADC 22 Mux")) 558 nid = RT700_MIXER_IN1; 559 else if (strstr(ucontrol->id.name, "ADC 23 Mux")) 560 nid = RT700_MIXER_IN2; 561 else 562 return -EINVAL; 563 564 /* Verb ID = 0x701h */ 565 val = snd_soc_enum_item_to_val(e, item[0]) << e->shift_l; 566 567 reg = RT700_VERB_SET_CONNECT_SEL | nid; 568 ret = regmap_read(rt700->regmap, reg, &val2); 569 if (ret < 0) 570 return ret; 571 572 if (val == val2) 573 change = 0; 574 else 575 change = 1; 576 577 if (change) { 578 reg = RT700_VERB_SET_CONNECT_SEL | nid; 579 regmap_write(rt700->regmap, reg, val); 580 } 581 582 snd_soc_dapm_mux_update_power(dapm, kcontrol, 583 item[0], e, NULL); 584 585 return change; 586} 587 588static const char * const adc_mux_text[] = { 589 "MIC2", 590 "LINE1", 591 "LINE2", 592 "DMIC", 593}; 594 595static SOC_ENUM_SINGLE_DECL( 596 rt700_adc22_enum, SND_SOC_NOPM, 0, adc_mux_text); 597 598static SOC_ENUM_SINGLE_DECL( 599 rt700_adc23_enum, SND_SOC_NOPM, 0, adc_mux_text); 600 601static const struct snd_kcontrol_new rt700_adc22_mux = 602 SOC_DAPM_ENUM_EXT("ADC 22 Mux", rt700_adc22_enum, 603 rt700_mux_get, rt700_mux_put); 604 605static const struct snd_kcontrol_new rt700_adc23_mux = 606 SOC_DAPM_ENUM_EXT("ADC 23 Mux", rt700_adc23_enum, 607 rt700_mux_get, rt700_mux_put); 608 609static const char * const out_mux_text[] = { 610 "Front", 611 "Surround", 612}; 613 614static SOC_ENUM_SINGLE_DECL( 615 rt700_hp_enum, SND_SOC_NOPM, 0, out_mux_text); 616 617static const struct snd_kcontrol_new rt700_hp_mux = 618 SOC_DAPM_ENUM_EXT("HP Mux", rt700_hp_enum, 619 rt700_mux_get, rt700_mux_put); 620 621static int rt700_dac_front_event(struct snd_soc_dapm_widget *w, 622 struct snd_kcontrol *kcontrol, int event) 623{ 624 struct snd_soc_component *component = 625 snd_soc_dapm_to_component(w->dapm); 626 struct rt700_priv *rt700 = snd_soc_component_get_drvdata(component); 627 628 switch (event) { 629 case SND_SOC_DAPM_POST_PMU: 630 regmap_write(rt700->regmap, 631 RT700_SET_STREAMID_DAC1, 0x10); 632 break; 633 case SND_SOC_DAPM_PRE_PMD: 634 regmap_write(rt700->regmap, 635 RT700_SET_STREAMID_DAC1, 0x00); 636 break; 637 } 638 return 0; 639} 640 641static int rt700_dac_surround_event(struct snd_soc_dapm_widget *w, 642 struct snd_kcontrol *kcontrol, int event) 643{ 644 struct snd_soc_component *component = 645 snd_soc_dapm_to_component(w->dapm); 646 struct rt700_priv *rt700 = snd_soc_component_get_drvdata(component); 647 648 switch (event) { 649 case SND_SOC_DAPM_POST_PMU: 650 regmap_write(rt700->regmap, 651 RT700_SET_STREAMID_DAC2, 0x10); 652 break; 653 case SND_SOC_DAPM_PRE_PMD: 654 regmap_write(rt700->regmap, 655 RT700_SET_STREAMID_DAC2, 0x00); 656 break; 657 } 658 return 0; 659} 660 661static int rt700_adc_09_event(struct snd_soc_dapm_widget *w, 662 struct snd_kcontrol *kcontrol, int event) 663{ 664 struct snd_soc_component *component = 665 snd_soc_dapm_to_component(w->dapm); 666 struct rt700_priv *rt700 = snd_soc_component_get_drvdata(component); 667 668 switch (event) { 669 case SND_SOC_DAPM_POST_PMU: 670 regmap_write(rt700->regmap, 671 RT700_SET_STREAMID_ADC1, 0x10); 672 break; 673 case SND_SOC_DAPM_PRE_PMD: 674 regmap_write(rt700->regmap, 675 RT700_SET_STREAMID_ADC1, 0x00); 676 break; 677 } 678 return 0; 679} 680 681static int rt700_adc_08_event(struct snd_soc_dapm_widget *w, 682 struct snd_kcontrol *kcontrol, int event) 683{ 684 struct snd_soc_component *component = 685 snd_soc_dapm_to_component(w->dapm); 686 struct rt700_priv *rt700 = snd_soc_component_get_drvdata(component); 687 688 switch (event) { 689 case SND_SOC_DAPM_POST_PMU: 690 regmap_write(rt700->regmap, 691 RT700_SET_STREAMID_ADC2, 0x10); 692 break; 693 case SND_SOC_DAPM_PRE_PMD: 694 regmap_write(rt700->regmap, 695 RT700_SET_STREAMID_ADC2, 0x00); 696 break; 697 } 698 return 0; 699} 700 701static int rt700_hpo_mux_event(struct snd_soc_dapm_widget *w, 702 struct snd_kcontrol *kcontrol, int event) 703{ 704 struct snd_soc_component *component = 705 snd_soc_dapm_to_component(w->dapm); 706 struct rt700_priv *rt700 = snd_soc_component_get_drvdata(component); 707 unsigned int val_h = (1 << RT700_DIR_OUT_SFT) | (0x3 << 4); 708 unsigned int val_l; 709 710 switch (event) { 711 case SND_SOC_DAPM_POST_PMU: 712 val_l = 0x00; 713 regmap_write(rt700->regmap, 714 RT700_SET_GAIN_HP_H, (val_h << 8 | val_l)); 715 break; 716 case SND_SOC_DAPM_PRE_PMD: 717 val_l = (1 << RT700_MUTE_SFT); 718 regmap_write(rt700->regmap, 719 RT700_SET_GAIN_HP_H, (val_h << 8 | val_l)); 720 usleep_range(50000, 55000); 721 break; 722 } 723 return 0; 724} 725 726static int rt700_spk_pga_event(struct snd_soc_dapm_widget *w, 727 struct snd_kcontrol *kcontrol, int event) 728{ 729 struct snd_soc_component *component = 730 snd_soc_dapm_to_component(w->dapm); 731 struct rt700_priv *rt700 = snd_soc_component_get_drvdata(component); 732 unsigned int val_h = (1 << RT700_DIR_OUT_SFT) | (0x3 << 4); 733 unsigned int val_l; 734 735 switch (event) { 736 case SND_SOC_DAPM_POST_PMU: 737 val_l = 0x00; 738 regmap_write(rt700->regmap, 739 RT700_SET_GAIN_SPK_H, (val_h << 8 | val_l)); 740 break; 741 case SND_SOC_DAPM_PRE_PMD: 742 val_l = (1 << RT700_MUTE_SFT); 743 regmap_write(rt700->regmap, 744 RT700_SET_GAIN_SPK_H, (val_h << 8 | val_l)); 745 break; 746 } 747 return 0; 748} 749 750static const struct snd_soc_dapm_widget rt700_dapm_widgets[] = { 751 SND_SOC_DAPM_OUTPUT("HP"), 752 SND_SOC_DAPM_OUTPUT("SPK"), 753 SND_SOC_DAPM_INPUT("DMIC1"), 754 SND_SOC_DAPM_INPUT("DMIC2"), 755 SND_SOC_DAPM_INPUT("MIC2"), 756 SND_SOC_DAPM_INPUT("LINE1"), 757 SND_SOC_DAPM_INPUT("LINE2"), 758 SND_SOC_DAPM_DAC_E("DAC Front", NULL, SND_SOC_NOPM, 0, 0, 759 rt700_dac_front_event, 760 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD), 761 SND_SOC_DAPM_DAC_E("DAC Surround", NULL, SND_SOC_NOPM, 0, 0, 762 rt700_dac_surround_event, 763 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD), 764 SND_SOC_DAPM_MUX_E("HPO Mux", SND_SOC_NOPM, 0, 0, &rt700_hp_mux, 765 rt700_hpo_mux_event, 766 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD), 767 SND_SOC_DAPM_PGA_E("SPK PGA", SND_SOC_NOPM, 0, 0, NULL, 0, 768 rt700_spk_pga_event, 769 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD), 770 SND_SOC_DAPM_ADC_E("ADC 09", NULL, SND_SOC_NOPM, 0, 0, 771 rt700_adc_09_event, 772 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD), 773 SND_SOC_DAPM_ADC_E("ADC 08", NULL, SND_SOC_NOPM, 0, 0, 774 rt700_adc_08_event, 775 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD), 776 SND_SOC_DAPM_MUX("ADC 22 Mux", SND_SOC_NOPM, 0, 0, 777 &rt700_adc22_mux), 778 SND_SOC_DAPM_MUX("ADC 23 Mux", SND_SOC_NOPM, 0, 0, 779 &rt700_adc23_mux), 780 SND_SOC_DAPM_AIF_IN("DP1RX", "DP1 Playback", 0, SND_SOC_NOPM, 0, 0), 781 SND_SOC_DAPM_AIF_IN("DP3RX", "DP3 Playback", 0, SND_SOC_NOPM, 0, 0), 782 SND_SOC_DAPM_AIF_OUT("DP2TX", "DP2 Capture", 0, SND_SOC_NOPM, 0, 0), 783 SND_SOC_DAPM_AIF_OUT("DP4TX", "DP4 Capture", 0, SND_SOC_NOPM, 0, 0), 784}; 785 786static const struct snd_soc_dapm_route rt700_audio_map[] = { 787 {"DAC Front", NULL, "DP1RX"}, 788 {"DAC Surround", NULL, "DP3RX"}, 789 {"DP2TX", NULL, "ADC 09"}, 790 {"DP4TX", NULL, "ADC 08"}, 791 {"ADC 09", NULL, "ADC 22 Mux"}, 792 {"ADC 08", NULL, "ADC 23 Mux"}, 793 {"ADC 22 Mux", "DMIC", "DMIC1"}, 794 {"ADC 22 Mux", "LINE1", "LINE1"}, 795 {"ADC 22 Mux", "LINE2", "LINE2"}, 796 {"ADC 22 Mux", "MIC2", "MIC2"}, 797 {"ADC 23 Mux", "DMIC", "DMIC2"}, 798 {"ADC 23 Mux", "LINE1", "LINE1"}, 799 {"ADC 23 Mux", "LINE2", "LINE2"}, 800 {"ADC 23 Mux", "MIC2", "MIC2"}, 801 {"HPO Mux", "Front", "DAC Front"}, 802 {"HPO Mux", "Surround", "DAC Surround"}, 803 {"HP", NULL, "HPO Mux"}, 804 {"SPK PGA", NULL, "DAC Front"}, 805 {"SPK", NULL, "SPK PGA"}, 806}; 807 808static int rt700_probe(struct snd_soc_component *component) 809{ 810 struct rt700_priv *rt700 = snd_soc_component_get_drvdata(component); 811 812 rt700->component = component; 813 814 return 0; 815} 816 817static int rt700_set_bias_level(struct snd_soc_component *component, 818 enum snd_soc_bias_level level) 819{ 820 struct snd_soc_dapm_context *dapm = 821 snd_soc_component_get_dapm(component); 822 struct rt700_priv *rt700 = snd_soc_component_get_drvdata(component); 823 824 switch (level) { 825 case SND_SOC_BIAS_PREPARE: 826 if (dapm->bias_level == SND_SOC_BIAS_STANDBY) { 827 regmap_write(rt700->regmap, 828 RT700_SET_AUDIO_POWER_STATE, 829 AC_PWRST_D0); 830 } 831 break; 832 833 case SND_SOC_BIAS_STANDBY: 834 regmap_write(rt700->regmap, 835 RT700_SET_AUDIO_POWER_STATE, 836 AC_PWRST_D3); 837 break; 838 839 default: 840 break; 841 } 842 dapm->bias_level = level; 843 return 0; 844} 845 846static const struct snd_soc_component_driver soc_codec_dev_rt700 = { 847 .probe = rt700_probe, 848 .set_bias_level = rt700_set_bias_level, 849 .controls = rt700_snd_controls, 850 .num_controls = ARRAY_SIZE(rt700_snd_controls), 851 .dapm_widgets = rt700_dapm_widgets, 852 .num_dapm_widgets = ARRAY_SIZE(rt700_dapm_widgets), 853 .dapm_routes = rt700_audio_map, 854 .num_dapm_routes = ARRAY_SIZE(rt700_audio_map), 855 .set_jack = rt700_set_jack_detect, 856}; 857 858static int rt700_set_sdw_stream(struct snd_soc_dai *dai, void *sdw_stream, 859 int direction) 860{ 861 struct sdw_stream_data *stream; 862 863 if (!sdw_stream) 864 return 0; 865 866 stream = kzalloc(sizeof(*stream), GFP_KERNEL); 867 if (!stream) 868 return -ENOMEM; 869 870 stream->sdw_stream = (struct sdw_stream_runtime *)sdw_stream; 871 872 /* Use tx_mask or rx_mask to configure stream tag and set dma_data */ 873 if (direction == SNDRV_PCM_STREAM_PLAYBACK) 874 dai->playback_dma_data = stream; 875 else 876 dai->capture_dma_data = stream; 877 878 return 0; 879} 880 881static void rt700_shutdown(struct snd_pcm_substream *substream, 882 struct snd_soc_dai *dai) 883{ 884 struct sdw_stream_data *stream; 885 886 stream = snd_soc_dai_get_dma_data(dai, substream); 887 snd_soc_dai_set_dma_data(dai, substream, NULL); 888 kfree(stream); 889} 890 891static int rt700_pcm_hw_params(struct snd_pcm_substream *substream, 892 struct snd_pcm_hw_params *params, 893 struct snd_soc_dai *dai) 894{ 895 struct snd_soc_component *component = dai->component; 896 struct rt700_priv *rt700 = snd_soc_component_get_drvdata(component); 897 struct sdw_stream_config stream_config; 898 struct sdw_port_config port_config; 899 enum sdw_data_direction direction; 900 struct sdw_stream_data *stream; 901 int retval, port, num_channels; 902 unsigned int val = 0; 903 904 dev_dbg(dai->dev, "%s %s", __func__, dai->name); 905 stream = snd_soc_dai_get_dma_data(dai, substream); 906 907 if (!stream) 908 return -EINVAL; 909 910 if (!rt700->slave) 911 return -EINVAL; 912 913 /* SoundWire specific configuration */ 914 /* This code assumes port 1 for playback and port 2 for capture */ 915 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 916 direction = SDW_DATA_DIR_RX; 917 port = 1; 918 } else { 919 direction = SDW_DATA_DIR_TX; 920 port = 2; 921 } 922 923 switch (dai->id) { 924 case RT700_AIF1: 925 break; 926 case RT700_AIF2: 927 port += 2; 928 break; 929 default: 930 dev_err(component->dev, "Invalid DAI id %d\n", dai->id); 931 return -EINVAL; 932 } 933 934 stream_config.frame_rate = params_rate(params); 935 stream_config.ch_count = params_channels(params); 936 stream_config.bps = snd_pcm_format_width(params_format(params)); 937 stream_config.direction = direction; 938 939 num_channels = params_channels(params); 940 port_config.ch_mask = (1 << (num_channels)) - 1; 941 port_config.num = port; 942 943 retval = sdw_stream_add_slave(rt700->slave, &stream_config, 944 &port_config, 1, stream->sdw_stream); 945 if (retval) { 946 dev_err(dai->dev, "Unable to configure port\n"); 947 return retval; 948 } 949 950 if (params_channels(params) <= 16) { 951 /* bit 3:0 Number of Channel */ 952 val |= (params_channels(params) - 1); 953 } else { 954 dev_err(component->dev, "Unsupported channels %d\n", 955 params_channels(params)); 956 return -EINVAL; 957 } 958 959 switch (params_width(params)) { 960 /* bit 6:4 Bits per Sample */ 961 case 8: 962 break; 963 case 16: 964 val |= (0x1 << 4); 965 break; 966 case 20: 967 val |= (0x2 << 4); 968 break; 969 case 24: 970 val |= (0x3 << 4); 971 break; 972 case 32: 973 val |= (0x4 << 4); 974 break; 975 default: 976 return -EINVAL; 977 } 978 979 /* 48Khz */ 980 regmap_write(rt700->regmap, RT700_DAC_FORMAT_H, val); 981 regmap_write(rt700->regmap, RT700_ADC_FORMAT_H, val); 982 983 return retval; 984} 985 986static int rt700_pcm_hw_free(struct snd_pcm_substream *substream, 987 struct snd_soc_dai *dai) 988{ 989 struct snd_soc_component *component = dai->component; 990 struct rt700_priv *rt700 = snd_soc_component_get_drvdata(component); 991 struct sdw_stream_data *stream = 992 snd_soc_dai_get_dma_data(dai, substream); 993 994 if (!rt700->slave) 995 return -EINVAL; 996 997 sdw_stream_remove_slave(rt700->slave, stream->sdw_stream); 998 return 0; 999} 1000 1001#define RT700_STEREO_RATES (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000) 1002#define RT700_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \ 1003 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S8) 1004 1005static struct snd_soc_dai_ops rt700_ops = { 1006 .hw_params = rt700_pcm_hw_params, 1007 .hw_free = rt700_pcm_hw_free, 1008 .set_stream = rt700_set_sdw_stream, 1009 .shutdown = rt700_shutdown, 1010}; 1011 1012static struct snd_soc_dai_driver rt700_dai[] = { 1013 { 1014 .name = "rt700-aif1", 1015 .id = RT700_AIF1, 1016 .playback = { 1017 .stream_name = "DP1 Playback", 1018 .channels_min = 1, 1019 .channels_max = 2, 1020 .rates = RT700_STEREO_RATES, 1021 .formats = RT700_FORMATS, 1022 }, 1023 .capture = { 1024 .stream_name = "DP2 Capture", 1025 .channels_min = 1, 1026 .channels_max = 2, 1027 .rates = RT700_STEREO_RATES, 1028 .formats = RT700_FORMATS, 1029 }, 1030 .ops = &rt700_ops, 1031 }, 1032 { 1033 .name = "rt700-aif2", 1034 .id = RT700_AIF2, 1035 .playback = { 1036 .stream_name = "DP3 Playback", 1037 .channels_min = 1, 1038 .channels_max = 2, 1039 .rates = RT700_STEREO_RATES, 1040 .formats = RT700_FORMATS, 1041 }, 1042 .capture = { 1043 .stream_name = "DP4 Capture", 1044 .channels_min = 1, 1045 .channels_max = 2, 1046 .rates = RT700_STEREO_RATES, 1047 .formats = RT700_FORMATS, 1048 }, 1049 .ops = &rt700_ops, 1050 }, 1051}; 1052 1053/* Bus clock frequency */ 1054#define RT700_CLK_FREQ_9600000HZ 9600000 1055#define RT700_CLK_FREQ_12000000HZ 12000000 1056#define RT700_CLK_FREQ_6000000HZ 6000000 1057#define RT700_CLK_FREQ_4800000HZ 4800000 1058#define RT700_CLK_FREQ_2400000HZ 2400000 1059#define RT700_CLK_FREQ_12288000HZ 12288000 1060 1061int rt700_clock_config(struct device *dev) 1062{ 1063 struct rt700_priv *rt700 = dev_get_drvdata(dev); 1064 unsigned int clk_freq, value; 1065 1066 clk_freq = (rt700->params.curr_dr_freq >> 1); 1067 1068 switch (clk_freq) { 1069 case RT700_CLK_FREQ_12000000HZ: 1070 value = 0x0; 1071 break; 1072 case RT700_CLK_FREQ_6000000HZ: 1073 value = 0x1; 1074 break; 1075 case RT700_CLK_FREQ_9600000HZ: 1076 value = 0x2; 1077 break; 1078 case RT700_CLK_FREQ_4800000HZ: 1079 value = 0x3; 1080 break; 1081 case RT700_CLK_FREQ_2400000HZ: 1082 value = 0x4; 1083 break; 1084 case RT700_CLK_FREQ_12288000HZ: 1085 value = 0x5; 1086 break; 1087 default: 1088 return -EINVAL; 1089 } 1090 1091 regmap_write(rt700->regmap, 0xe0, value); 1092 regmap_write(rt700->regmap, 0xf0, value); 1093 1094 dev_dbg(dev, "%s complete, clk_freq=%d\n", __func__, clk_freq); 1095 1096 return 0; 1097} 1098 1099int rt700_init(struct device *dev, struct regmap *sdw_regmap, 1100 struct regmap *regmap, struct sdw_slave *slave) 1101 1102{ 1103 struct rt700_priv *rt700; 1104 int ret; 1105 1106 rt700 = devm_kzalloc(dev, sizeof(*rt700), GFP_KERNEL); 1107 if (!rt700) 1108 return -ENOMEM; 1109 1110 dev_set_drvdata(dev, rt700); 1111 rt700->slave = slave; 1112 rt700->sdw_regmap = sdw_regmap; 1113 rt700->regmap = regmap; 1114 1115 /* 1116 * Mark hw_init to false 1117 * HW init will be performed when device reports present 1118 */ 1119 rt700->hw_init = false; 1120 rt700->first_hw_init = false; 1121 1122 ret = devm_snd_soc_register_component(dev, 1123 &soc_codec_dev_rt700, 1124 rt700_dai, 1125 ARRAY_SIZE(rt700_dai)); 1126 1127 dev_dbg(&slave->dev, "%s\n", __func__); 1128 1129 return ret; 1130} 1131 1132int rt700_io_init(struct device *dev, struct sdw_slave *slave) 1133{ 1134 struct rt700_priv *rt700 = dev_get_drvdata(dev); 1135 1136 if (rt700->hw_init) 1137 return 0; 1138 1139 if (rt700->first_hw_init) { 1140 regcache_cache_only(rt700->regmap, false); 1141 regcache_cache_bypass(rt700->regmap, true); 1142 } 1143 1144 /* 1145 * PM runtime is only enabled when a Slave reports as Attached 1146 */ 1147 if (!rt700->first_hw_init) { 1148 /* set autosuspend parameters */ 1149 pm_runtime_set_autosuspend_delay(&slave->dev, 3000); 1150 pm_runtime_use_autosuspend(&slave->dev); 1151 1152 /* update count of parent 'active' children */ 1153 pm_runtime_set_active(&slave->dev); 1154 1155 /* make sure the device does not suspend immediately */ 1156 pm_runtime_mark_last_busy(&slave->dev); 1157 1158 pm_runtime_enable(&slave->dev); 1159 } 1160 1161 pm_runtime_get_noresume(&slave->dev); 1162 1163 /* reset */ 1164 regmap_write(rt700->regmap, 0xff01, 0x0000); 1165 regmap_write(rt700->regmap, 0x7520, 0x001a); 1166 regmap_write(rt700->regmap, 0x7420, 0xc003); 1167 1168 /* power on */ 1169 regmap_write(rt700->regmap, RT700_SET_AUDIO_POWER_STATE, AC_PWRST_D0); 1170 /* Set Pin Widget */ 1171 regmap_write(rt700->regmap, RT700_SET_PIN_HP, 0x40); 1172 regmap_write(rt700->regmap, RT700_SET_PIN_SPK, 0x40); 1173 regmap_write(rt700->regmap, RT700_SET_EAPD_SPK, RT700_EAPD_HIGH); 1174 regmap_write(rt700->regmap, RT700_SET_PIN_DMIC1, 0x20); 1175 regmap_write(rt700->regmap, RT700_SET_PIN_DMIC2, 0x20); 1176 regmap_write(rt700->regmap, RT700_SET_PIN_MIC2, 0x20); 1177 1178 /* Set Configuration Default */ 1179 regmap_write(rt700->regmap, 0x4f12, 0x91); 1180 regmap_write(rt700->regmap, 0x4e12, 0xd6); 1181 regmap_write(rt700->regmap, 0x4d12, 0x11); 1182 regmap_write(rt700->regmap, 0x4c12, 0x20); 1183 regmap_write(rt700->regmap, 0x4f13, 0x91); 1184 regmap_write(rt700->regmap, 0x4e13, 0xd6); 1185 regmap_write(rt700->regmap, 0x4d13, 0x11); 1186 regmap_write(rt700->regmap, 0x4c13, 0x21); 1187 1188 regmap_write(rt700->regmap, 0x4f19, 0x02); 1189 regmap_write(rt700->regmap, 0x4e19, 0xa1); 1190 regmap_write(rt700->regmap, 0x4d19, 0x90); 1191 regmap_write(rt700->regmap, 0x4c19, 0x80); 1192 1193 /* Enable Line2 */ 1194 regmap_write(rt700->regmap, 0x371b, 0x40); 1195 regmap_write(rt700->regmap, 0x731b, 0xb0); 1196 regmap_write(rt700->regmap, 0x839b, 0x00); 1197 1198 /* Set index */ 1199 rt700_index_write(rt700->regmap, 0x4a, 0x201b); 1200 rt700_index_write(rt700->regmap, 0x45, 0x5089); 1201 rt700_index_write(rt700->regmap, 0x6b, 0x5064); 1202 rt700_index_write(rt700->regmap, 0x48, 0xd249); 1203 1204 /* Finish Initial Settings, set power to D3 */ 1205 regmap_write(rt700->regmap, RT700_SET_AUDIO_POWER_STATE, AC_PWRST_D3); 1206 1207 if (!rt700->first_hw_init) { 1208 INIT_DELAYED_WORK(&rt700->jack_detect_work, 1209 rt700_jack_detect_handler); 1210 INIT_DELAYED_WORK(&rt700->jack_btn_check_work, 1211 rt700_btn_check_handler); 1212 } 1213 1214 /* 1215 * if set_jack callback occurred early than io_init, 1216 * we set up the jack detection function now 1217 */ 1218 if (rt700->hs_jack) 1219 rt700_jack_init(rt700); 1220 1221 if (rt700->first_hw_init) { 1222 regcache_cache_bypass(rt700->regmap, false); 1223 regcache_mark_dirty(rt700->regmap); 1224 } else 1225 rt700->first_hw_init = true; 1226 1227 /* Mark Slave initialization complete */ 1228 rt700->hw_init = true; 1229 1230 pm_runtime_mark_last_busy(&slave->dev); 1231 pm_runtime_put_autosuspend(&slave->dev); 1232 1233 dev_dbg(&slave->dev, "%s hw_init complete\n", __func__); 1234 1235 return 0; 1236} 1237 1238MODULE_DESCRIPTION("ASoC RT700 driver SDW"); 1239MODULE_AUTHOR("Shuming Fan <shumingf@realtek.com>"); 1240MODULE_LICENSE("GPL v2"); 1241