950 lines · c
1// SPDX-License-Identifier: GPL-2.0-only2/*3 * wm2000.c -- WM2000 ALSA Soc Audio driver4 *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 as10 * 'wm2000_anc.bin' by default (overridable via platform data) at11 * runtime and is expected to be in flat binary format. This is12 * generated by Wolfson configuration tools and includes13 * system-specific calibration information. If supplied as a14 * sequence of ASCII-encoded hexidecimal bytes this can be converted15 * 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.bin19 */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 346 47static const char *wm2000_supplies[WM2000_NUM_SUPPLIES] = {48 "SPKVDD",49 "DBVDD",50 "DCVDD",51};52 53enum wm2000_anc_mode {54 ANC_ACTIVE = 0,55 ANC_BYPASS = 1,56 ANC_STANDBY = 2,57 ANC_OFF = 3,58};59 60struct 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 81static 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 88static 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 99static 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 else116 return 1;117}118 119static 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 bulk169 * 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 else211 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 234static 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 268static 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 307static 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 342static 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 386static 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 425typedef int (*wm2000_mode_fn)(struct i2c_client *i2c, int analogue);426 427static 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 534static 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 578static 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 else587 mode = ANC_BYPASS;588 else589 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 598static 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 609static 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 631static 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 642static 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 664static 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 674static 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 696static const struct snd_soc_dapm_widget wm2000_dapm_widgets[] = {697/* Externally visible pins */698SND_SOC_DAPM_OUTPUT("SPKN"),699SND_SOC_DAPM_OUTPUT("SPKP"),700 701SND_SOC_DAPM_INPUT("LINN"),702SND_SOC_DAPM_INPUT("LINP"),703 704SND_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 */710static 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_PM718static 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 725static 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#else732#define wm2000_suspend NULL733#define wm2000_resume NULL734#endif735 736static 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 768static 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 776static 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 786static 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 793static 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 808static 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 923err_supplies:924 regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);925 926out:927 release_firmware(fw);928 return ret;929}930 931static const struct i2c_device_id wm2000_i2c_id[] = {932 { "wm2000" },933 { }934};935MODULE_DEVICE_TABLE(i2c, wm2000_i2c_id);936 937static 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 945module_i2c_driver(wm2000_i2c_driver);946 947MODULE_DESCRIPTION("ASoC WM2000 driver");948MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfonmicro.com>");949MODULE_LICENSE("GPL");950