1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * wm2000.c -- WM2000 ALSA Soc Audio driver 4 * 5 * Copyright 2008-2011 Wolfson Microelectronics PLC. 6 * 7 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> 8 * 9 * The download image for the WM2000 will be requested as 10 * 'wm2000_anc.bin' by default (overridable via platform data) at 11 * runtime and is expected to be in flat binary format. This is 12 * generated by Wolfson configuration tools and includes 13 * system-specific calibration information. If supplied as a 14 * sequence of ASCII-encoded hexidecimal bytes this can be converted 15 * into a flat binary with a command such as this on the command line: 16 * 17 * perl -e 'while (<>) { s/[\r\n]+// ; printf("%c", hex($_)); }' 18 * < file > wm2000_anc.bin 19 */ 20 21 #include <linux/module.h> 22 #include <linux/moduleparam.h> 23 #include <linux/kernel.h> 24 #include <linux/init.h> 25 #include <linux/firmware.h> 26 #include <linux/clk.h> 27 #include <linux/delay.h> 28 #include <linux/pm.h> 29 #include <linux/i2c.h> 30 #include <linux/regmap.h> 31 #include <linux/debugfs.h> 32 #include <linux/regulator/consumer.h> 33 #include <linux/slab.h> 34 #include <sound/core.h> 35 #include <sound/pcm.h> 36 #include <sound/pcm_params.h> 37 #include <sound/soc.h> 38 #include <sound/initval.h> 39 #include <sound/tlv.h> 40 41 #include <sound/wm2000.h> 42 43 #include "wm2000.h" 44 45 #define WM2000_NUM_SUPPLIES 3 46 47 static const char *wm2000_supplies[WM2000_NUM_SUPPLIES] = { 48 "SPKVDD", 49 "DBVDD", 50 "DCVDD", 51 }; 52 53 enum wm2000_anc_mode { 54 ANC_ACTIVE = 0, 55 ANC_BYPASS = 1, 56 ANC_STANDBY = 2, 57 ANC_OFF = 3, 58 }; 59 60 struct wm2000_priv { 61 struct i2c_client *i2c; 62 struct regmap *regmap; 63 struct clk *mclk; 64 65 struct regulator_bulk_data supplies[WM2000_NUM_SUPPLIES]; 66 67 enum wm2000_anc_mode anc_mode; 68 69 unsigned int anc_active:1; 70 unsigned int anc_eng_ena:1; 71 unsigned int spk_ena:1; 72 73 unsigned int speech_clarity:1; 74 75 int anc_download_size; 76 char *anc_download; 77 78 struct mutex lock; 79 }; 80 81 static int wm2000_write(struct i2c_client *i2c, unsigned int reg, 82 unsigned int value) 83 { 84 struct wm2000_priv *wm2000 = i2c_get_clientdata(i2c); 85 return regmap_write(wm2000->regmap, reg, value); 86 } 87 88 static void wm2000_reset(struct wm2000_priv *wm2000) 89 { 90 struct i2c_client *i2c = wm2000->i2c; 91 92 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_ENG_CLR); 93 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_CLR); 94 wm2000_write(i2c, WM2000_REG_ID1, 0); 95 96 wm2000->anc_mode = ANC_OFF; 97 } 98 99 static int wm2000_poll_bit(struct i2c_client *i2c, 100 unsigned int reg, u8 mask) 101 { 102 struct wm2000_priv *wm2000 = i2c_get_clientdata(i2c); 103 int timeout = 4000; 104 unsigned int val; 105 106 regmap_read(wm2000->regmap, reg, &val); 107 108 while (!(val & mask) && --timeout) { 109 msleep(1); 110 regmap_read(wm2000->regmap, reg, &val); 111 } 112 113 if (timeout == 0) 114 return 0; 115 else 116 return 1; 117 } 118 119 static int wm2000_power_up(struct i2c_client *i2c, int analogue) 120 { 121 struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev); 122 unsigned long rate; 123 unsigned int val; 124 int ret; 125 126 if (WARN_ON(wm2000->anc_mode != ANC_OFF)) 127 return -EINVAL; 128 129 dev_dbg(&i2c->dev, "Beginning power up\n"); 130 131 ret = regulator_bulk_enable(WM2000_NUM_SUPPLIES, wm2000->supplies); 132 if (ret != 0) { 133 dev_err(&i2c->dev, "Failed to enable supplies: %d\n", ret); 134 return ret; 135 } 136 137 rate = clk_get_rate(wm2000->mclk); 138 if (rate <= 13500000) { 139 dev_dbg(&i2c->dev, "Disabling MCLK divider\n"); 140 wm2000_write(i2c, WM2000_REG_SYS_CTL2, 141 WM2000_MCLK_DIV2_ENA_CLR); 142 } else { 143 dev_dbg(&i2c->dev, "Enabling MCLK divider\n"); 144 wm2000_write(i2c, WM2000_REG_SYS_CTL2, 145 WM2000_MCLK_DIV2_ENA_SET); 146 } 147 148 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_ENG_CLR); 149 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_ENG_SET); 150 151 /* Wait for ANC engine to become ready */ 152 if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT, 153 WM2000_ANC_ENG_IDLE)) { 154 dev_err(&i2c->dev, "ANC engine failed to reset\n"); 155 regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies); 156 return -ETIMEDOUT; 157 } 158 159 if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS, 160 WM2000_STATUS_BOOT_COMPLETE)) { 161 dev_err(&i2c->dev, "ANC engine failed to initialise\n"); 162 regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies); 163 return -ETIMEDOUT; 164 } 165 166 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_SET); 167 168 /* Open code download of the data since it is the only bulk 169 * write we do. */ 170 dev_dbg(&i2c->dev, "Downloading %d bytes\n", 171 wm2000->anc_download_size - 2); 172 173 ret = i2c_master_send(i2c, wm2000->anc_download, 174 wm2000->anc_download_size); 175 if (ret < 0) { 176 dev_err(&i2c->dev, "i2c_transfer() failed: %d\n", ret); 177 regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies); 178 return ret; 179 } 180 if (ret != wm2000->anc_download_size) { 181 dev_err(&i2c->dev, "i2c_transfer() failed, %d != %d\n", 182 ret, wm2000->anc_download_size); 183 regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies); 184 return -EIO; 185 } 186 187 dev_dbg(&i2c->dev, "Download complete\n"); 188 189 if (analogue) { 190 wm2000_write(i2c, WM2000_REG_ANA_VMID_PU_TIME, 248 / 4); 191 192 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL, 193 WM2000_MODE_ANA_SEQ_INCLUDE | 194 WM2000_MODE_MOUSE_ENABLE | 195 WM2000_MODE_THERMAL_ENABLE); 196 } else { 197 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL, 198 WM2000_MODE_MOUSE_ENABLE | 199 WM2000_MODE_THERMAL_ENABLE); 200 } 201 202 ret = regmap_read(wm2000->regmap, WM2000_REG_SPEECH_CLARITY, &val); 203 if (ret != 0) { 204 dev_err(&i2c->dev, "Unable to read Speech Clarity: %d\n", ret); 205 regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies); 206 return ret; 207 } 208 if (wm2000->speech_clarity) 209 val |= WM2000_SPEECH_CLARITY; 210 else 211 val &= ~WM2000_SPEECH_CLARITY; 212 wm2000_write(i2c, WM2000_REG_SPEECH_CLARITY, val); 213 214 wm2000_write(i2c, WM2000_REG_SYS_START0, 0x33); 215 wm2000_write(i2c, WM2000_REG_SYS_START1, 0x02); 216 217 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_INT_N_CLR); 218 219 if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS, 220 WM2000_STATUS_MOUSE_ACTIVE)) { 221 dev_err(&i2c->dev, "Timed out waiting for device\n"); 222 regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies); 223 return -ETIMEDOUT; 224 } 225 226 dev_dbg(&i2c->dev, "ANC active\n"); 227 if (analogue) 228 dev_dbg(&i2c->dev, "Analogue active\n"); 229 wm2000->anc_mode = ANC_ACTIVE; 230 231 return 0; 232 } 233 234 static int wm2000_power_down(struct i2c_client *i2c, int analogue) 235 { 236 struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev); 237 238 if (analogue) { 239 wm2000_write(i2c, WM2000_REG_ANA_VMID_PD_TIME, 248 / 4); 240 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL, 241 WM2000_MODE_ANA_SEQ_INCLUDE | 242 WM2000_MODE_POWER_DOWN); 243 } else { 244 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL, 245 WM2000_MODE_POWER_DOWN); 246 } 247 248 if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS, 249 WM2000_STATUS_POWER_DOWN_COMPLETE)) { 250 dev_err(&i2c->dev, "Timeout waiting for ANC power down\n"); 251 return -ETIMEDOUT; 252 } 253 254 if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT, 255 WM2000_ANC_ENG_IDLE)) { 256 dev_err(&i2c->dev, "Timeout waiting for ANC engine idle\n"); 257 return -ETIMEDOUT; 258 } 259 260 regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies); 261 262 dev_dbg(&i2c->dev, "powered off\n"); 263 wm2000->anc_mode = ANC_OFF; 264 265 return 0; 266 } 267 268 static int wm2000_enter_bypass(struct i2c_client *i2c, int analogue) 269 { 270 struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev); 271 272 if (WARN_ON(wm2000->anc_mode != ANC_ACTIVE)) 273 return -EINVAL; 274 275 if (analogue) { 276 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL, 277 WM2000_MODE_ANA_SEQ_INCLUDE | 278 WM2000_MODE_THERMAL_ENABLE | 279 WM2000_MODE_BYPASS_ENTRY); 280 } else { 281 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL, 282 WM2000_MODE_THERMAL_ENABLE | 283 WM2000_MODE_BYPASS_ENTRY); 284 } 285 286 if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS, 287 WM2000_STATUS_ANC_DISABLED)) { 288 dev_err(&i2c->dev, "Timeout waiting for ANC disable\n"); 289 return -ETIMEDOUT; 290 } 291 292 if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT, 293 WM2000_ANC_ENG_IDLE)) { 294 dev_err(&i2c->dev, "Timeout waiting for ANC engine idle\n"); 295 return -ETIMEDOUT; 296 } 297 298 wm2000_write(i2c, WM2000_REG_SYS_CTL1, WM2000_SYS_STBY); 299 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_CLR); 300 301 wm2000->anc_mode = ANC_BYPASS; 302 dev_dbg(&i2c->dev, "bypass enabled\n"); 303 304 return 0; 305 } 306 307 static int wm2000_exit_bypass(struct i2c_client *i2c, int analogue) 308 { 309 struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev); 310 311 if (WARN_ON(wm2000->anc_mode != ANC_BYPASS)) 312 return -EINVAL; 313 314 wm2000_write(i2c, WM2000_REG_SYS_CTL1, 0); 315 316 if (analogue) { 317 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL, 318 WM2000_MODE_ANA_SEQ_INCLUDE | 319 WM2000_MODE_MOUSE_ENABLE | 320 WM2000_MODE_THERMAL_ENABLE); 321 } else { 322 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL, 323 WM2000_MODE_MOUSE_ENABLE | 324 WM2000_MODE_THERMAL_ENABLE); 325 } 326 327 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_SET); 328 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_INT_N_CLR); 329 330 if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS, 331 WM2000_STATUS_MOUSE_ACTIVE)) { 332 dev_err(&i2c->dev, "Timed out waiting for MOUSE\n"); 333 return -ETIMEDOUT; 334 } 335 336 wm2000->anc_mode = ANC_ACTIVE; 337 dev_dbg(&i2c->dev, "MOUSE active\n"); 338 339 return 0; 340 } 341 342 static int wm2000_enter_standby(struct i2c_client *i2c, int analogue) 343 { 344 struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev); 345 346 if (WARN_ON(wm2000->anc_mode != ANC_ACTIVE)) 347 return -EINVAL; 348 349 if (analogue) { 350 wm2000_write(i2c, WM2000_REG_ANA_VMID_PD_TIME, 248 / 4); 351 352 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL, 353 WM2000_MODE_ANA_SEQ_INCLUDE | 354 WM2000_MODE_THERMAL_ENABLE | 355 WM2000_MODE_STANDBY_ENTRY); 356 } else { 357 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL, 358 WM2000_MODE_THERMAL_ENABLE | 359 WM2000_MODE_STANDBY_ENTRY); 360 } 361 362 if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS, 363 WM2000_STATUS_ANC_DISABLED)) { 364 dev_err(&i2c->dev, 365 "Timed out waiting for ANC disable after 1ms\n"); 366 return -ETIMEDOUT; 367 } 368 369 if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT, WM2000_ANC_ENG_IDLE)) { 370 dev_err(&i2c->dev, 371 "Timed out waiting for standby\n"); 372 return -ETIMEDOUT; 373 } 374 375 wm2000_write(i2c, WM2000_REG_SYS_CTL1, WM2000_SYS_STBY); 376 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_CLR); 377 378 wm2000->anc_mode = ANC_STANDBY; 379 dev_dbg(&i2c->dev, "standby\n"); 380 if (analogue) 381 dev_dbg(&i2c->dev, "Analogue disabled\n"); 382 383 return 0; 384 } 385 386 static int wm2000_exit_standby(struct i2c_client *i2c, int analogue) 387 { 388 struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev); 389 390 if (WARN_ON(wm2000->anc_mode != ANC_STANDBY)) 391 return -EINVAL; 392 393 wm2000_write(i2c, WM2000_REG_SYS_CTL1, 0); 394 395 if (analogue) { 396 wm2000_write(i2c, WM2000_REG_ANA_VMID_PU_TIME, 248 / 4); 397 398 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL, 399 WM2000_MODE_ANA_SEQ_INCLUDE | 400 WM2000_MODE_THERMAL_ENABLE | 401 WM2000_MODE_MOUSE_ENABLE); 402 } else { 403 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL, 404 WM2000_MODE_THERMAL_ENABLE | 405 WM2000_MODE_MOUSE_ENABLE); 406 } 407 408 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_SET); 409 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_INT_N_CLR); 410 411 if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS, 412 WM2000_STATUS_MOUSE_ACTIVE)) { 413 dev_err(&i2c->dev, "Timed out waiting for MOUSE\n"); 414 return -ETIMEDOUT; 415 } 416 417 wm2000->anc_mode = ANC_ACTIVE; 418 dev_dbg(&i2c->dev, "MOUSE active\n"); 419 if (analogue) 420 dev_dbg(&i2c->dev, "Analogue enabled\n"); 421 422 return 0; 423 } 424 425 typedef int (*wm2000_mode_fn)(struct i2c_client *i2c, int analogue); 426 427 static struct { 428 enum wm2000_anc_mode source; 429 enum wm2000_anc_mode dest; 430 int analogue; 431 wm2000_mode_fn step[2]; 432 } anc_transitions[] = { 433 { 434 .source = ANC_OFF, 435 .dest = ANC_ACTIVE, 436 .analogue = 1, 437 .step = { 438 wm2000_power_up, 439 }, 440 }, 441 { 442 .source = ANC_OFF, 443 .dest = ANC_STANDBY, 444 .step = { 445 wm2000_power_up, 446 wm2000_enter_standby, 447 }, 448 }, 449 { 450 .source = ANC_OFF, 451 .dest = ANC_BYPASS, 452 .analogue = 1, 453 .step = { 454 wm2000_power_up, 455 wm2000_enter_bypass, 456 }, 457 }, 458 { 459 .source = ANC_ACTIVE, 460 .dest = ANC_BYPASS, 461 .analogue = 1, 462 .step = { 463 wm2000_enter_bypass, 464 }, 465 }, 466 { 467 .source = ANC_ACTIVE, 468 .dest = ANC_STANDBY, 469 .analogue = 1, 470 .step = { 471 wm2000_enter_standby, 472 }, 473 }, 474 { 475 .source = ANC_ACTIVE, 476 .dest = ANC_OFF, 477 .analogue = 1, 478 .step = { 479 wm2000_power_down, 480 }, 481 }, 482 { 483 .source = ANC_BYPASS, 484 .dest = ANC_ACTIVE, 485 .analogue = 1, 486 .step = { 487 wm2000_exit_bypass, 488 }, 489 }, 490 { 491 .source = ANC_BYPASS, 492 .dest = ANC_STANDBY, 493 .analogue = 1, 494 .step = { 495 wm2000_exit_bypass, 496 wm2000_enter_standby, 497 }, 498 }, 499 { 500 .source = ANC_BYPASS, 501 .dest = ANC_OFF, 502 .step = { 503 wm2000_exit_bypass, 504 wm2000_power_down, 505 }, 506 }, 507 { 508 .source = ANC_STANDBY, 509 .dest = ANC_ACTIVE, 510 .analogue = 1, 511 .step = { 512 wm2000_exit_standby, 513 }, 514 }, 515 { 516 .source = ANC_STANDBY, 517 .dest = ANC_BYPASS, 518 .analogue = 1, 519 .step = { 520 wm2000_exit_standby, 521 wm2000_enter_bypass, 522 }, 523 }, 524 { 525 .source = ANC_STANDBY, 526 .dest = ANC_OFF, 527 .step = { 528 wm2000_exit_standby, 529 wm2000_power_down, 530 }, 531 }, 532 }; 533 534 static int wm2000_anc_transition(struct wm2000_priv *wm2000, 535 enum wm2000_anc_mode mode) 536 { 537 struct i2c_client *i2c = wm2000->i2c; 538 int i, j; 539 int ret = 0; 540 541 if (wm2000->anc_mode == mode) 542 return 0; 543 544 for (i = 0; i < ARRAY_SIZE(anc_transitions); i++) 545 if (anc_transitions[i].source == wm2000->anc_mode && 546 anc_transitions[i].dest == mode) 547 break; 548 if (i == ARRAY_SIZE(anc_transitions)) { 549 dev_err(&i2c->dev, "No transition for %d->%d\n", 550 wm2000->anc_mode, mode); 551 return -EINVAL; 552 } 553 554 /* Maintain clock while active */ 555 if (anc_transitions[i].source == ANC_OFF) { 556 ret = clk_prepare_enable(wm2000->mclk); 557 if (ret != 0) { 558 dev_err(&i2c->dev, "Failed to enable MCLK: %d\n", ret); 559 return ret; 560 } 561 } 562 563 for (j = 0; j < ARRAY_SIZE(anc_transitions[j].step); j++) { 564 if (!anc_transitions[i].step[j]) 565 break; 566 ret = anc_transitions[i].step[j](i2c, 567 anc_transitions[i].analogue); 568 if (ret != 0) 569 break; 570 } 571 572 if (anc_transitions[i].dest == ANC_OFF) 573 clk_disable_unprepare(wm2000->mclk); 574 575 return ret; 576 } 577 578 static int wm2000_anc_set_mode(struct wm2000_priv *wm2000) 579 { 580 struct i2c_client *i2c = wm2000->i2c; 581 enum wm2000_anc_mode mode; 582 583 if (wm2000->anc_eng_ena && wm2000->spk_ena) 584 if (wm2000->anc_active) 585 mode = ANC_ACTIVE; 586 else 587 mode = ANC_BYPASS; 588 else 589 mode = ANC_STANDBY; 590 591 dev_dbg(&i2c->dev, "Set mode %d (enabled %d, mute %d, active %d)\n", 592 mode, wm2000->anc_eng_ena, !wm2000->spk_ena, 593 wm2000->anc_active); 594 595 return wm2000_anc_transition(wm2000, mode); 596 } 597 598 static int wm2000_anc_mode_get(struct snd_kcontrol *kcontrol, 599 struct snd_ctl_elem_value *ucontrol) 600 { 601 struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol); 602 struct wm2000_priv *wm2000 = dev_get_drvdata(component->dev); 603 604 ucontrol->value.integer.value[0] = wm2000->anc_active; 605 606 return 0; 607 } 608 609 static int wm2000_anc_mode_put(struct snd_kcontrol *kcontrol, 610 struct snd_ctl_elem_value *ucontrol) 611 { 612 struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol); 613 struct wm2000_priv *wm2000 = dev_get_drvdata(component->dev); 614 unsigned int anc_active = ucontrol->value.integer.value[0]; 615 int ret; 616 617 if (anc_active > 1) 618 return -EINVAL; 619 620 mutex_lock(&wm2000->lock); 621 622 wm2000->anc_active = anc_active; 623 624 ret = wm2000_anc_set_mode(wm2000); 625 626 mutex_unlock(&wm2000->lock); 627 628 return ret; 629 } 630 631 static int wm2000_speaker_get(struct snd_kcontrol *kcontrol, 632 struct snd_ctl_elem_value *ucontrol) 633 { 634 struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol); 635 struct wm2000_priv *wm2000 = dev_get_drvdata(component->dev); 636 637 ucontrol->value.integer.value[0] = wm2000->spk_ena; 638 639 return 0; 640 } 641 642 static int wm2000_speaker_put(struct snd_kcontrol *kcontrol, 643 struct snd_ctl_elem_value *ucontrol) 644 { 645 struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol); 646 struct wm2000_priv *wm2000 = dev_get_drvdata(component->dev); 647 unsigned int val = ucontrol->value.integer.value[0]; 648 int ret; 649 650 if (val > 1) 651 return -EINVAL; 652 653 mutex_lock(&wm2000->lock); 654 655 wm2000->spk_ena = val; 656 657 ret = wm2000_anc_set_mode(wm2000); 658 659 mutex_unlock(&wm2000->lock); 660 661 return ret; 662 } 663 664 static const struct snd_kcontrol_new wm2000_controls[] = { 665 SOC_SINGLE("ANC Volume", WM2000_REG_ANC_GAIN_CTRL, 0, 255, 0), 666 SOC_SINGLE_BOOL_EXT("WM2000 ANC Switch", 0, 667 wm2000_anc_mode_get, 668 wm2000_anc_mode_put), 669 SOC_SINGLE_BOOL_EXT("WM2000 Switch", 0, 670 wm2000_speaker_get, 671 wm2000_speaker_put), 672 }; 673 674 static int wm2000_anc_power_event(struct snd_soc_dapm_widget *w, 675 struct snd_kcontrol *kcontrol, int event) 676 { 677 struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm); 678 struct wm2000_priv *wm2000 = dev_get_drvdata(component->dev); 679 int ret; 680 681 mutex_lock(&wm2000->lock); 682 683 if (SND_SOC_DAPM_EVENT_ON(event)) 684 wm2000->anc_eng_ena = 1; 685 686 if (SND_SOC_DAPM_EVENT_OFF(event)) 687 wm2000->anc_eng_ena = 0; 688 689 ret = wm2000_anc_set_mode(wm2000); 690 691 mutex_unlock(&wm2000->lock); 692 693 return ret; 694 } 695 696 static const struct snd_soc_dapm_widget wm2000_dapm_widgets[] = { 697 /* Externally visible pins */ 698 SND_SOC_DAPM_OUTPUT("SPKN"), 699 SND_SOC_DAPM_OUTPUT("SPKP"), 700 701 SND_SOC_DAPM_INPUT("LINN"), 702 SND_SOC_DAPM_INPUT("LINP"), 703 704 SND_SOC_DAPM_PGA_E("ANC Engine", SND_SOC_NOPM, 0, 0, NULL, 0, 705 wm2000_anc_power_event, 706 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD), 707 }; 708 709 /* Target, Path, Source */ 710 static const struct snd_soc_dapm_route wm2000_audio_map[] = { 711 { "SPKN", NULL, "ANC Engine" }, 712 { "SPKP", NULL, "ANC Engine" }, 713 { "ANC Engine", NULL, "LINN" }, 714 { "ANC Engine", NULL, "LINP" }, 715 }; 716 717 #ifdef CONFIG_PM 718 static int wm2000_suspend(struct snd_soc_component *component) 719 { 720 struct wm2000_priv *wm2000 = dev_get_drvdata(component->dev); 721 722 return wm2000_anc_transition(wm2000, ANC_OFF); 723 } 724 725 static int wm2000_resume(struct snd_soc_component *component) 726 { 727 struct wm2000_priv *wm2000 = dev_get_drvdata(component->dev); 728 729 return wm2000_anc_set_mode(wm2000); 730 } 731 #else 732 #define wm2000_suspend NULL 733 #define wm2000_resume NULL 734 #endif 735 736 static bool wm2000_readable_reg(struct device *dev, unsigned int reg) 737 { 738 switch (reg) { 739 case WM2000_REG_SYS_START: 740 case WM2000_REG_ANC_GAIN_CTRL: 741 case WM2000_REG_MSE_TH1: 742 case WM2000_REG_MSE_TH2: 743 case WM2000_REG_SPEECH_CLARITY: 744 case WM2000_REG_SYS_WATCHDOG: 745 case WM2000_REG_ANA_VMID_PD_TIME: 746 case WM2000_REG_ANA_VMID_PU_TIME: 747 case WM2000_REG_CAT_FLTR_INDX: 748 case WM2000_REG_CAT_GAIN_0: 749 case WM2000_REG_SYS_STATUS: 750 case WM2000_REG_SYS_MODE_CNTRL: 751 case WM2000_REG_SYS_START0: 752 case WM2000_REG_SYS_START1: 753 case WM2000_REG_ID1: 754 case WM2000_REG_ID2: 755 case WM2000_REG_REVISON: 756 case WM2000_REG_SYS_CTL1: 757 case WM2000_REG_SYS_CTL2: 758 case WM2000_REG_ANC_STAT: 759 case WM2000_REG_IF_CTL: 760 case WM2000_REG_ANA_MIC_CTL: 761 case WM2000_REG_SPK_CTL: 762 return true; 763 default: 764 return false; 765 } 766 } 767 768 static const struct regmap_config wm2000_regmap = { 769 .reg_bits = 16, 770 .val_bits = 8, 771 772 .max_register = WM2000_REG_SPK_CTL, 773 .readable_reg = wm2000_readable_reg, 774 }; 775 776 static int wm2000_probe(struct snd_soc_component *component) 777 { 778 struct wm2000_priv *wm2000 = dev_get_drvdata(component->dev); 779 780 /* This will trigger a transition to standby mode by default */ 781 wm2000_anc_set_mode(wm2000); 782 783 return 0; 784 } 785 786 static void wm2000_remove(struct snd_soc_component *component) 787 { 788 struct wm2000_priv *wm2000 = dev_get_drvdata(component->dev); 789 790 wm2000_anc_transition(wm2000, ANC_OFF); 791 } 792 793 static const struct snd_soc_component_driver soc_component_dev_wm2000 = { 794 .probe = wm2000_probe, 795 .remove = wm2000_remove, 796 .suspend = wm2000_suspend, 797 .resume = wm2000_resume, 798 .controls = wm2000_controls, 799 .num_controls = ARRAY_SIZE(wm2000_controls), 800 .dapm_widgets = wm2000_dapm_widgets, 801 .num_dapm_widgets = ARRAY_SIZE(wm2000_dapm_widgets), 802 .dapm_routes = wm2000_audio_map, 803 .num_dapm_routes = ARRAY_SIZE(wm2000_audio_map), 804 .idle_bias_on = 1, 805 .use_pmdown_time = 1, 806 }; 807 808 static int wm2000_i2c_probe(struct i2c_client *i2c) 809 { 810 struct wm2000_priv *wm2000; 811 struct wm2000_platform_data *pdata; 812 const char *filename; 813 const struct firmware *fw = NULL; 814 int ret, i; 815 unsigned int reg; 816 u16 id; 817 818 wm2000 = devm_kzalloc(&i2c->dev, sizeof(*wm2000), GFP_KERNEL); 819 if (!wm2000) 820 return -ENOMEM; 821 822 mutex_init(&wm2000->lock); 823 824 dev_set_drvdata(&i2c->dev, wm2000); 825 826 wm2000->regmap = devm_regmap_init_i2c(i2c, &wm2000_regmap); 827 if (IS_ERR(wm2000->regmap)) { 828 ret = PTR_ERR(wm2000->regmap); 829 dev_err(&i2c->dev, "Failed to allocate register map: %d\n", 830 ret); 831 goto out; 832 } 833 834 for (i = 0; i < WM2000_NUM_SUPPLIES; i++) 835 wm2000->supplies[i].supply = wm2000_supplies[i]; 836 837 ret = devm_regulator_bulk_get(&i2c->dev, WM2000_NUM_SUPPLIES, 838 wm2000->supplies); 839 if (ret != 0) { 840 dev_err(&i2c->dev, "Failed to get supplies: %d\n", ret); 841 return ret; 842 } 843 844 ret = regulator_bulk_enable(WM2000_NUM_SUPPLIES, wm2000->supplies); 845 if (ret != 0) { 846 dev_err(&i2c->dev, "Failed to enable supplies: %d\n", ret); 847 return ret; 848 } 849 850 /* Verify that this is a WM2000 */ 851 ret = regmap_read(wm2000->regmap, WM2000_REG_ID1, ®); 852 if (ret != 0) { 853 dev_err(&i2c->dev, "Unable to read ID1: %d\n", ret); 854 return ret; 855 } 856 id = reg << 8; 857 ret = regmap_read(wm2000->regmap, WM2000_REG_ID2, ®); 858 if (ret != 0) { 859 dev_err(&i2c->dev, "Unable to read ID2: %d\n", ret); 860 return ret; 861 } 862 id |= reg & 0xff; 863 864 if (id != 0x2000) { 865 dev_err(&i2c->dev, "Device is not a WM2000 - ID %x\n", id); 866 ret = -ENODEV; 867 goto err_supplies; 868 } 869 870 ret = regmap_read(wm2000->regmap, WM2000_REG_REVISON, ®); 871 if (ret != 0) { 872 dev_err(&i2c->dev, "Unable to read Revision: %d\n", ret); 873 return ret; 874 } 875 dev_info(&i2c->dev, "revision %c\n", reg + 'A'); 876 877 wm2000->mclk = devm_clk_get(&i2c->dev, "MCLK"); 878 if (IS_ERR(wm2000->mclk)) { 879 ret = PTR_ERR(wm2000->mclk); 880 dev_err(&i2c->dev, "Failed to get MCLK: %d\n", ret); 881 goto err_supplies; 882 } 883 884 filename = "wm2000_anc.bin"; 885 pdata = dev_get_platdata(&i2c->dev); 886 if (pdata) { 887 wm2000->speech_clarity = !pdata->speech_enh_disable; 888 889 if (pdata->download_file) 890 filename = pdata->download_file; 891 } 892 893 ret = request_firmware(&fw, filename, &i2c->dev); 894 if (ret != 0) { 895 dev_err(&i2c->dev, "Failed to acquire ANC data: %d\n", ret); 896 goto err_supplies; 897 } 898 899 /* Pre-cook the concatenation of the register address onto the image */ 900 wm2000->anc_download_size = fw->size + 2; 901 wm2000->anc_download = devm_kzalloc(&i2c->dev, 902 wm2000->anc_download_size, 903 GFP_KERNEL); 904 if (wm2000->anc_download == NULL) { 905 ret = -ENOMEM; 906 goto err_supplies; 907 } 908 909 wm2000->anc_download[0] = 0x80; 910 wm2000->anc_download[1] = 0x00; 911 memcpy(wm2000->anc_download + 2, fw->data, fw->size); 912 913 wm2000->anc_eng_ena = 1; 914 wm2000->anc_active = 1; 915 wm2000->spk_ena = 1; 916 wm2000->i2c = i2c; 917 918 wm2000_reset(wm2000); 919 920 ret = devm_snd_soc_register_component(&i2c->dev, 921 &soc_component_dev_wm2000, NULL, 0); 922 923 err_supplies: 924 regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies); 925 926 out: 927 release_firmware(fw); 928 return ret; 929 } 930 931 static const struct i2c_device_id wm2000_i2c_id[] = { 932 { "wm2000", 0 }, 933 { } 934 }; 935 MODULE_DEVICE_TABLE(i2c, wm2000_i2c_id); 936 937 static struct i2c_driver wm2000_i2c_driver = { 938 .driver = { 939 .name = "wm2000", 940 }, 941 .probe = wm2000_i2c_probe, 942 .id_table = wm2000_i2c_id, 943 }; 944 945 module_i2c_driver(wm2000_i2c_driver); 946 947 MODULE_DESCRIPTION("ASoC WM2000 driver"); 948 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfonmicro.com>"); 949 MODULE_LICENSE("GPL"); 950