1 // SPDX-License-Identifier: GPL-2.0-only 2 // Copyright (c) 2015-2021, The Linux Foundation. All rights reserved. 3 4 #include <linux/module.h> 5 #include <linux/init.h> 6 #include <linux/slab.h> 7 #include <linux/device.h> 8 #include <linux/printk.h> 9 #include <linux/delay.h> 10 #include <linux/kernel.h> 11 #include <sound/soc.h> 12 #include <sound/jack.h> 13 #include "wcd-mbhc-v2.h" 14 15 #define HS_DETECT_PLUG_TIME_MS (3 * 1000) 16 #define MBHC_BUTTON_PRESS_THRESHOLD_MIN 250 17 #define GND_MIC_SWAP_THRESHOLD 4 18 #define WCD_FAKE_REMOVAL_MIN_PERIOD_MS 100 19 #define HPHL_CROSS_CONN_THRESHOLD 100 20 #define HS_VREF_MIN_VAL 1400 21 #define FAKE_REM_RETRY_ATTEMPTS 3 22 #define WCD_MBHC_ADC_HS_THRESHOLD_MV 1700 23 #define WCD_MBHC_ADC_HPH_THRESHOLD_MV 75 24 #define WCD_MBHC_ADC_MICBIAS_MV 1800 25 #define WCD_MBHC_FAKE_INS_RETRY 4 26 27 #define WCD_MBHC_JACK_MASK (SND_JACK_HEADSET | SND_JACK_LINEOUT | \ 28 SND_JACK_MECHANICAL) 29 30 #define WCD_MBHC_JACK_BUTTON_MASK (SND_JACK_BTN_0 | SND_JACK_BTN_1 | \ 31 SND_JACK_BTN_2 | SND_JACK_BTN_3 | \ 32 SND_JACK_BTN_4 | SND_JACK_BTN_5) 33 34 enum wcd_mbhc_adc_mux_ctl { 35 MUX_CTL_AUTO = 0, 36 MUX_CTL_IN2P, 37 MUX_CTL_IN3P, 38 MUX_CTL_IN4P, 39 MUX_CTL_HPH_L, 40 MUX_CTL_HPH_R, 41 MUX_CTL_NONE, 42 }; 43 44 struct wcd_mbhc { 45 struct device *dev; 46 struct snd_soc_component *component; 47 struct snd_soc_jack *jack; 48 struct wcd_mbhc_config *cfg; 49 const struct wcd_mbhc_cb *mbhc_cb; 50 const struct wcd_mbhc_intr *intr_ids; 51 struct wcd_mbhc_field *fields; 52 /* Delayed work to report long button press */ 53 struct delayed_work mbhc_btn_dwork; 54 /* Work to correct accessory type */ 55 struct work_struct correct_plug_swch; 56 struct mutex lock; 57 int buttons_pressed; 58 u32 hph_status; /* track headhpone status */ 59 u8 current_plug; 60 bool is_btn_press; 61 bool in_swch_irq_handler; 62 bool hs_detect_work_stop; 63 bool is_hs_recording; 64 bool extn_cable_hph_rem; 65 bool force_linein; 66 bool impedance_detect; 67 unsigned long event_state; 68 unsigned long jiffies_atreport; 69 /* impedance of hphl and hphr */ 70 uint32_t zl, zr; 71 /* Holds type of Headset - Mono/Stereo */ 72 enum wcd_mbhc_hph_type hph_type; 73 /* Holds mbhc detection method - ADC/Legacy */ 74 int mbhc_detection_logic; 75 }; 76 77 static inline int wcd_mbhc_write_field(const struct wcd_mbhc *mbhc, 78 int field, int val) 79 { 80 if (!mbhc->fields[field].reg) 81 return 0; 82 83 return snd_soc_component_write_field(mbhc->component, 84 mbhc->fields[field].reg, 85 mbhc->fields[field].mask, val); 86 } 87 88 static inline int wcd_mbhc_read_field(const struct wcd_mbhc *mbhc, int field) 89 { 90 if (!mbhc->fields[field].reg) 91 return 0; 92 93 return snd_soc_component_read_field(mbhc->component, 94 mbhc->fields[field].reg, 95 mbhc->fields[field].mask); 96 } 97 98 static void wcd_program_hs_vref(struct wcd_mbhc *mbhc) 99 { 100 u32 reg_val = ((mbhc->cfg->v_hs_max - HS_VREF_MIN_VAL) / 100); 101 102 wcd_mbhc_write_field(mbhc, WCD_MBHC_HS_VREF, reg_val); 103 } 104 105 static void wcd_program_btn_threshold(const struct wcd_mbhc *mbhc, bool micbias) 106 { 107 struct snd_soc_component *component = mbhc->component; 108 109 mbhc->mbhc_cb->set_btn_thr(component, mbhc->cfg->btn_low, 110 mbhc->cfg->btn_high, 111 mbhc->cfg->num_btn, micbias); 112 } 113 114 static void wcd_mbhc_curr_micbias_control(const struct wcd_mbhc *mbhc, 115 const enum wcd_mbhc_cs_mb_en_flag cs_mb_en) 116 { 117 118 /* 119 * Some codecs handle micbias/pullup enablement in codec 120 * drivers itself and micbias is not needed for regular 121 * plug type detection. So if micbias_control callback function 122 * is defined, just return. 123 */ 124 if (mbhc->mbhc_cb->mbhc_micbias_control) 125 return; 126 127 switch (cs_mb_en) { 128 case WCD_MBHC_EN_CS: 129 wcd_mbhc_write_field(mbhc, WCD_MBHC_MICB_CTRL, 0); 130 wcd_mbhc_write_field(mbhc, WCD_MBHC_BTN_ISRC_CTL, 3); 131 /* Program Button threshold registers as per CS */ 132 wcd_program_btn_threshold(mbhc, false); 133 break; 134 case WCD_MBHC_EN_MB: 135 wcd_mbhc_write_field(mbhc, WCD_MBHC_BTN_ISRC_CTL, 0); 136 wcd_mbhc_write_field(mbhc, WCD_MBHC_FSM_EN, 1); 137 /* Disable PULL_UP_EN & enable MICBIAS */ 138 wcd_mbhc_write_field(mbhc, WCD_MBHC_MICB_CTRL, 2); 139 /* Program Button threshold registers as per MICBIAS */ 140 wcd_program_btn_threshold(mbhc, true); 141 break; 142 case WCD_MBHC_EN_PULLUP: 143 wcd_mbhc_write_field(mbhc, WCD_MBHC_BTN_ISRC_CTL, 3); 144 wcd_mbhc_write_field(mbhc, WCD_MBHC_FSM_EN, 1); 145 wcd_mbhc_write_field(mbhc, WCD_MBHC_MICB_CTRL, 1); 146 /* Program Button threshold registers as per MICBIAS */ 147 wcd_program_btn_threshold(mbhc, true); 148 break; 149 case WCD_MBHC_EN_NONE: 150 wcd_mbhc_write_field(mbhc, WCD_MBHC_BTN_ISRC_CTL, 0); 151 wcd_mbhc_write_field(mbhc, WCD_MBHC_FSM_EN, 1); 152 wcd_mbhc_write_field(mbhc, WCD_MBHC_MICB_CTRL, 0); 153 break; 154 default: 155 dev_err(mbhc->dev, "%s: Invalid parameter", __func__); 156 break; 157 } 158 } 159 160 int wcd_mbhc_event_notify(struct wcd_mbhc *mbhc, unsigned long event) 161 { 162 163 struct snd_soc_component *component; 164 bool micbias2 = false; 165 166 if (!mbhc) 167 return 0; 168 169 component = mbhc->component; 170 171 if (mbhc->mbhc_cb->micbias_enable_status) 172 micbias2 = mbhc->mbhc_cb->micbias_enable_status(component, MIC_BIAS_2); 173 174 switch (event) { 175 /* MICBIAS usage change */ 176 case WCD_EVENT_POST_DAPM_MICBIAS_2_ON: 177 mbhc->is_hs_recording = true; 178 break; 179 case WCD_EVENT_POST_MICBIAS_2_ON: 180 /* Disable current source if micbias2 enabled */ 181 if (mbhc->mbhc_cb->mbhc_micbias_control) { 182 if (wcd_mbhc_read_field(mbhc, WCD_MBHC_FSM_EN)) 183 wcd_mbhc_write_field(mbhc, WCD_MBHC_BTN_ISRC_CTL, 0); 184 } else { 185 mbhc->is_hs_recording = true; 186 wcd_mbhc_curr_micbias_control(mbhc, WCD_MBHC_EN_MB); 187 } 188 break; 189 case WCD_EVENT_PRE_MICBIAS_2_OFF: 190 /* 191 * Before MICBIAS_2 is turned off, if FSM is enabled, 192 * make sure current source is enabled so as to detect 193 * button press/release events 194 */ 195 if (mbhc->mbhc_cb->mbhc_micbias_control/* && !mbhc->micbias_enable*/) { 196 if (wcd_mbhc_read_field(mbhc, WCD_MBHC_FSM_EN)) 197 wcd_mbhc_write_field(mbhc, WCD_MBHC_BTN_ISRC_CTL, 3); 198 } 199 break; 200 /* MICBIAS usage change */ 201 case WCD_EVENT_POST_DAPM_MICBIAS_2_OFF: 202 mbhc->is_hs_recording = false; 203 break; 204 case WCD_EVENT_POST_MICBIAS_2_OFF: 205 if (!mbhc->mbhc_cb->mbhc_micbias_control) 206 mbhc->is_hs_recording = false; 207 208 /* Enable PULL UP if PA's are enabled */ 209 if ((test_bit(WCD_MBHC_EVENT_PA_HPHL, &mbhc->event_state)) || 210 (test_bit(WCD_MBHC_EVENT_PA_HPHR, &mbhc->event_state))) 211 /* enable pullup and cs, disable mb */ 212 wcd_mbhc_curr_micbias_control(mbhc, WCD_MBHC_EN_PULLUP); 213 else 214 /* enable current source and disable mb, pullup*/ 215 wcd_mbhc_curr_micbias_control(mbhc, WCD_MBHC_EN_CS); 216 217 break; 218 case WCD_EVENT_POST_HPHL_PA_OFF: 219 clear_bit(WCD_MBHC_EVENT_PA_HPHL, &mbhc->event_state); 220 221 /* check if micbias is enabled */ 222 if (micbias2) 223 /* Disable cs, pullup & enable micbias */ 224 wcd_mbhc_curr_micbias_control(mbhc, WCD_MBHC_EN_MB); 225 else 226 /* Disable micbias, pullup & enable cs */ 227 wcd_mbhc_curr_micbias_control(mbhc, WCD_MBHC_EN_CS); 228 break; 229 case WCD_EVENT_POST_HPHR_PA_OFF: 230 clear_bit(WCD_MBHC_EVENT_PA_HPHR, &mbhc->event_state); 231 /* check if micbias is enabled */ 232 if (micbias2) 233 /* Disable cs, pullup & enable micbias */ 234 wcd_mbhc_curr_micbias_control(mbhc, WCD_MBHC_EN_MB); 235 else 236 /* Disable micbias, pullup & enable cs */ 237 wcd_mbhc_curr_micbias_control(mbhc, WCD_MBHC_EN_CS); 238 break; 239 case WCD_EVENT_PRE_HPHL_PA_ON: 240 set_bit(WCD_MBHC_EVENT_PA_HPHL, &mbhc->event_state); 241 /* check if micbias is enabled */ 242 if (micbias2) 243 /* Disable cs, pullup & enable micbias */ 244 wcd_mbhc_curr_micbias_control(mbhc, WCD_MBHC_EN_MB); 245 else 246 /* Disable micbias, enable pullup & cs */ 247 wcd_mbhc_curr_micbias_control(mbhc, WCD_MBHC_EN_PULLUP); 248 break; 249 case WCD_EVENT_PRE_HPHR_PA_ON: 250 set_bit(WCD_MBHC_EVENT_PA_HPHR, &mbhc->event_state); 251 /* check if micbias is enabled */ 252 if (micbias2) 253 /* Disable cs, pullup & enable micbias */ 254 wcd_mbhc_curr_micbias_control(mbhc, WCD_MBHC_EN_MB); 255 else 256 /* Disable micbias, enable pullup & cs */ 257 wcd_mbhc_curr_micbias_control(mbhc, WCD_MBHC_EN_PULLUP); 258 break; 259 default: 260 break; 261 } 262 return 0; 263 } 264 EXPORT_SYMBOL_GPL(wcd_mbhc_event_notify); 265 266 static int wcd_cancel_btn_work(struct wcd_mbhc *mbhc) 267 { 268 return cancel_delayed_work_sync(&mbhc->mbhc_btn_dwork); 269 } 270 271 static void wcd_micbias_disable(struct wcd_mbhc *mbhc) 272 { 273 struct snd_soc_component *component = mbhc->component; 274 275 if (mbhc->mbhc_cb->mbhc_micbias_control) 276 mbhc->mbhc_cb->mbhc_micbias_control(component, MIC_BIAS_2, MICB_DISABLE); 277 278 if (mbhc->mbhc_cb->mbhc_micb_ctrl_thr_mic) 279 mbhc->mbhc_cb->mbhc_micb_ctrl_thr_mic(component, MIC_BIAS_2, false); 280 281 if (mbhc->mbhc_cb->set_micbias_value) { 282 mbhc->mbhc_cb->set_micbias_value(component); 283 wcd_mbhc_write_field(mbhc, WCD_MBHC_MICB_CTRL, 0); 284 } 285 } 286 287 static void wcd_mbhc_report_plug_removal(struct wcd_mbhc *mbhc, 288 enum snd_jack_types jack_type) 289 { 290 mbhc->hph_status &= ~jack_type; 291 /* 292 * cancel possibly scheduled btn work and 293 * report release if we reported button press 294 */ 295 if (!wcd_cancel_btn_work(mbhc) && mbhc->buttons_pressed) { 296 snd_soc_jack_report(mbhc->jack, 0, mbhc->buttons_pressed); 297 mbhc->buttons_pressed &= ~WCD_MBHC_JACK_BUTTON_MASK; 298 } 299 300 wcd_micbias_disable(mbhc); 301 mbhc->hph_type = WCD_MBHC_HPH_NONE; 302 mbhc->zl = mbhc->zr = 0; 303 snd_soc_jack_report(mbhc->jack, mbhc->hph_status, WCD_MBHC_JACK_MASK); 304 mbhc->current_plug = MBHC_PLUG_TYPE_NONE; 305 mbhc->force_linein = false; 306 } 307 308 static void wcd_mbhc_compute_impedance(struct wcd_mbhc *mbhc) 309 { 310 311 if (!mbhc->impedance_detect) 312 return; 313 314 if (mbhc->cfg->linein_th != 0) { 315 u8 fsm_en = wcd_mbhc_read_field(mbhc, WCD_MBHC_FSM_EN); 316 /* Set MUX_CTL to AUTO for Z-det */ 317 318 wcd_mbhc_write_field(mbhc, WCD_MBHC_FSM_EN, 0); 319 wcd_mbhc_write_field(mbhc, WCD_MBHC_MUX_CTL, MUX_CTL_AUTO); 320 wcd_mbhc_write_field(mbhc, WCD_MBHC_FSM_EN, 1); 321 mbhc->mbhc_cb->compute_impedance(mbhc->component, &mbhc->zl, &mbhc->zr); 322 wcd_mbhc_write_field(mbhc, WCD_MBHC_FSM_EN, fsm_en); 323 } 324 } 325 326 static void wcd_mbhc_report_plug_insertion(struct wcd_mbhc *mbhc, 327 enum snd_jack_types jack_type) 328 { 329 bool is_pa_on; 330 /* 331 * Report removal of current jack type. 332 * Headphone to headset shouldn't report headphone 333 * removal. 334 */ 335 if (mbhc->current_plug == MBHC_PLUG_TYPE_HEADSET && 336 jack_type == SND_JACK_HEADPHONE) 337 mbhc->hph_status &= ~SND_JACK_HEADSET; 338 339 /* Report insertion */ 340 switch (jack_type) { 341 case SND_JACK_HEADPHONE: 342 mbhc->current_plug = MBHC_PLUG_TYPE_HEADPHONE; 343 break; 344 case SND_JACK_HEADSET: 345 mbhc->current_plug = MBHC_PLUG_TYPE_HEADSET; 346 mbhc->jiffies_atreport = jiffies; 347 break; 348 case SND_JACK_LINEOUT: 349 mbhc->current_plug = MBHC_PLUG_TYPE_HIGH_HPH; 350 break; 351 default: 352 break; 353 } 354 355 356 is_pa_on = wcd_mbhc_read_field(mbhc, WCD_MBHC_HPH_PA_EN); 357 358 if (!is_pa_on) { 359 wcd_mbhc_compute_impedance(mbhc); 360 if ((mbhc->zl > mbhc->cfg->linein_th) && 361 (mbhc->zr > mbhc->cfg->linein_th) && 362 (jack_type == SND_JACK_HEADPHONE)) { 363 jack_type = SND_JACK_LINEOUT; 364 mbhc->force_linein = true; 365 mbhc->current_plug = MBHC_PLUG_TYPE_HIGH_HPH; 366 if (mbhc->hph_status) { 367 mbhc->hph_status &= ~(SND_JACK_HEADSET | 368 SND_JACK_LINEOUT); 369 snd_soc_jack_report(mbhc->jack, mbhc->hph_status, 370 WCD_MBHC_JACK_MASK); 371 } 372 } 373 } 374 375 /* Do not calculate impedance again for lineout 376 * as during playback pa is on and impedance values 377 * will not be correct resulting in lineout detected 378 * as headphone. 379 */ 380 if (is_pa_on && mbhc->force_linein) { 381 jack_type = SND_JACK_LINEOUT; 382 mbhc->current_plug = MBHC_PLUG_TYPE_HIGH_HPH; 383 if (mbhc->hph_status) { 384 mbhc->hph_status &= ~(SND_JACK_HEADSET | 385 SND_JACK_LINEOUT); 386 snd_soc_jack_report(mbhc->jack, mbhc->hph_status, 387 WCD_MBHC_JACK_MASK); 388 } 389 } 390 391 mbhc->hph_status |= jack_type; 392 393 if (jack_type == SND_JACK_HEADPHONE && mbhc->mbhc_cb->mbhc_micb_ramp_control) 394 mbhc->mbhc_cb->mbhc_micb_ramp_control(mbhc->component, false); 395 396 snd_soc_jack_report(mbhc->jack, (mbhc->hph_status | SND_JACK_MECHANICAL), 397 WCD_MBHC_JACK_MASK); 398 } 399 400 static void wcd_mbhc_report_plug(struct wcd_mbhc *mbhc, int insertion, 401 enum snd_jack_types jack_type) 402 { 403 404 WARN_ON(!mutex_is_locked(&mbhc->lock)); 405 406 if (!insertion) /* Report removal */ 407 wcd_mbhc_report_plug_removal(mbhc, jack_type); 408 else 409 wcd_mbhc_report_plug_insertion(mbhc, jack_type); 410 411 } 412 413 static void wcd_cancel_hs_detect_plug(struct wcd_mbhc *mbhc, 414 struct work_struct *work) 415 { 416 mbhc->hs_detect_work_stop = true; 417 mutex_unlock(&mbhc->lock); 418 cancel_work_sync(work); 419 mutex_lock(&mbhc->lock); 420 } 421 422 static void wcd_mbhc_cancel_pending_work(struct wcd_mbhc *mbhc) 423 { 424 /* cancel pending button press */ 425 wcd_cancel_btn_work(mbhc); 426 /* cancel correct work function */ 427 wcd_cancel_hs_detect_plug(mbhc, &mbhc->correct_plug_swch); 428 } 429 430 static void wcd_mbhc_elec_hs_report_unplug(struct wcd_mbhc *mbhc) 431 { 432 wcd_mbhc_cancel_pending_work(mbhc); 433 /* Report extension cable */ 434 wcd_mbhc_report_plug(mbhc, 1, SND_JACK_LINEOUT); 435 /* 436 * Disable HPHL trigger and MIC Schmitt triggers. 437 * Setup for insertion detection. 438 */ 439 disable_irq_nosync(mbhc->intr_ids->mbhc_hs_rem_intr); 440 wcd_mbhc_curr_micbias_control(mbhc, WCD_MBHC_EN_NONE); 441 /* Disable HW FSM */ 442 wcd_mbhc_write_field(mbhc, WCD_MBHC_FSM_EN, 0); 443 wcd_mbhc_write_field(mbhc, WCD_MBHC_ELECT_SCHMT_ISRC, 3); 444 445 /* Set the detection type appropriately */ 446 wcd_mbhc_write_field(mbhc, WCD_MBHC_ELECT_DETECTION_TYPE, 1); 447 enable_irq(mbhc->intr_ids->mbhc_hs_ins_intr); 448 } 449 450 static void wcd_mbhc_find_plug_and_report(struct wcd_mbhc *mbhc, 451 enum wcd_mbhc_plug_type plug_type) 452 { 453 if (mbhc->current_plug == plug_type) 454 return; 455 456 mutex_lock(&mbhc->lock); 457 458 switch (plug_type) { 459 case MBHC_PLUG_TYPE_HEADPHONE: 460 wcd_mbhc_report_plug(mbhc, 1, SND_JACK_HEADPHONE); 461 break; 462 case MBHC_PLUG_TYPE_HEADSET: 463 wcd_mbhc_report_plug(mbhc, 1, SND_JACK_HEADSET); 464 break; 465 case MBHC_PLUG_TYPE_HIGH_HPH: 466 wcd_mbhc_report_plug(mbhc, 1, SND_JACK_LINEOUT); 467 break; 468 case MBHC_PLUG_TYPE_GND_MIC_SWAP: 469 if (mbhc->current_plug == MBHC_PLUG_TYPE_HEADPHONE) 470 wcd_mbhc_report_plug(mbhc, 0, SND_JACK_HEADPHONE); 471 if (mbhc->current_plug == MBHC_PLUG_TYPE_HEADSET) 472 wcd_mbhc_report_plug(mbhc, 0, SND_JACK_HEADSET); 473 break; 474 default: 475 WARN(1, "Unexpected current plug_type %d, plug_type %d\n", 476 mbhc->current_plug, plug_type); 477 break; 478 } 479 mutex_unlock(&mbhc->lock); 480 } 481 482 static void wcd_schedule_hs_detect_plug(struct wcd_mbhc *mbhc, 483 struct work_struct *work) 484 { 485 WARN_ON(!mutex_is_locked(&mbhc->lock)); 486 mbhc->hs_detect_work_stop = false; 487 schedule_work(work); 488 } 489 490 static void wcd_mbhc_adc_detect_plug_type(struct wcd_mbhc *mbhc) 491 { 492 struct snd_soc_component *component = mbhc->component; 493 494 WARN_ON(!mutex_is_locked(&mbhc->lock)); 495 496 if (mbhc->mbhc_cb->hph_pull_down_ctrl) 497 mbhc->mbhc_cb->hph_pull_down_ctrl(component, false); 498 499 wcd_mbhc_write_field(mbhc, WCD_MBHC_DETECTION_DONE, 0); 500 501 if (mbhc->mbhc_cb->mbhc_micbias_control) { 502 mbhc->mbhc_cb->mbhc_micbias_control(component, MIC_BIAS_2, 503 MICB_ENABLE); 504 wcd_schedule_hs_detect_plug(mbhc, &mbhc->correct_plug_swch); 505 } 506 } 507 508 static irqreturn_t wcd_mbhc_mech_plug_detect_irq(int irq, void *data) 509 { 510 struct snd_soc_component *component; 511 enum snd_jack_types jack_type; 512 struct wcd_mbhc *mbhc = data; 513 bool detection_type; 514 515 component = mbhc->component; 516 mutex_lock(&mbhc->lock); 517 518 mbhc->in_swch_irq_handler = true; 519 520 wcd_mbhc_cancel_pending_work(mbhc); 521 522 detection_type = wcd_mbhc_read_field(mbhc, WCD_MBHC_MECH_DETECTION_TYPE); 523 524 /* Set the detection type appropriately */ 525 wcd_mbhc_write_field(mbhc, WCD_MBHC_MECH_DETECTION_TYPE, !detection_type); 526 527 /* Enable micbias ramp */ 528 if (mbhc->mbhc_cb->mbhc_micb_ramp_control) 529 mbhc->mbhc_cb->mbhc_micb_ramp_control(component, true); 530 531 if (detection_type) { 532 if (mbhc->current_plug != MBHC_PLUG_TYPE_NONE) 533 goto exit; 534 /* Make sure MASTER_BIAS_CTL is enabled */ 535 mbhc->mbhc_cb->mbhc_bias(component, true); 536 mbhc->is_btn_press = false; 537 wcd_mbhc_adc_detect_plug_type(mbhc); 538 } else { 539 /* Disable HW FSM */ 540 wcd_mbhc_write_field(mbhc, WCD_MBHC_FSM_EN, 0); 541 wcd_mbhc_write_field(mbhc, WCD_MBHC_BTN_ISRC_CTL, 0); 542 mbhc->extn_cable_hph_rem = false; 543 544 if (mbhc->current_plug == MBHC_PLUG_TYPE_NONE) 545 goto exit; 546 547 mbhc->is_btn_press = false; 548 switch (mbhc->current_plug) { 549 case MBHC_PLUG_TYPE_HEADPHONE: 550 jack_type = SND_JACK_HEADPHONE; 551 break; 552 case MBHC_PLUG_TYPE_HEADSET: 553 jack_type = SND_JACK_HEADSET; 554 break; 555 case MBHC_PLUG_TYPE_HIGH_HPH: 556 if (mbhc->mbhc_detection_logic == WCD_DETECTION_ADC) 557 wcd_mbhc_write_field(mbhc, WCD_MBHC_ELECT_ISRC_EN, 0); 558 jack_type = SND_JACK_LINEOUT; 559 break; 560 case MBHC_PLUG_TYPE_GND_MIC_SWAP: 561 dev_err(mbhc->dev, "Ground and Mic Swapped on plug\n"); 562 goto exit; 563 default: 564 dev_err(mbhc->dev, "Invalid current plug: %d\n", 565 mbhc->current_plug); 566 goto exit; 567 } 568 disable_irq_nosync(mbhc->intr_ids->mbhc_hs_rem_intr); 569 disable_irq_nosync(mbhc->intr_ids->mbhc_hs_ins_intr); 570 wcd_mbhc_write_field(mbhc, WCD_MBHC_ELECT_DETECTION_TYPE, 1); 571 wcd_mbhc_write_field(mbhc, WCD_MBHC_ELECT_SCHMT_ISRC, 0); 572 wcd_mbhc_report_plug(mbhc, 0, jack_type); 573 } 574 575 exit: 576 mbhc->in_swch_irq_handler = false; 577 mutex_unlock(&mbhc->lock); 578 return IRQ_HANDLED; 579 } 580 581 static int wcd_mbhc_get_button_mask(struct wcd_mbhc *mbhc) 582 { 583 int mask = 0; 584 int btn; 585 586 btn = wcd_mbhc_read_field(mbhc, WCD_MBHC_BTN_RESULT); 587 588 switch (btn) { 589 case 0: 590 mask = SND_JACK_BTN_0; 591 break; 592 case 1: 593 mask = SND_JACK_BTN_1; 594 break; 595 case 2: 596 mask = SND_JACK_BTN_2; 597 break; 598 case 3: 599 mask = SND_JACK_BTN_3; 600 break; 601 case 4: 602 mask = SND_JACK_BTN_4; 603 break; 604 case 5: 605 mask = SND_JACK_BTN_5; 606 break; 607 default: 608 break; 609 } 610 611 return mask; 612 } 613 614 static void wcd_btn_long_press_fn(struct work_struct *work) 615 { 616 struct delayed_work *dwork = to_delayed_work(work); 617 struct wcd_mbhc *mbhc = container_of(dwork, struct wcd_mbhc, mbhc_btn_dwork); 618 619 if (mbhc->current_plug == MBHC_PLUG_TYPE_HEADSET) 620 snd_soc_jack_report(mbhc->jack, mbhc->buttons_pressed, 621 mbhc->buttons_pressed); 622 } 623 624 static irqreturn_t wcd_mbhc_btn_press_handler(int irq, void *data) 625 { 626 struct wcd_mbhc *mbhc = data; 627 int mask; 628 unsigned long msec_val; 629 630 mutex_lock(&mbhc->lock); 631 wcd_cancel_btn_work(mbhc); 632 mbhc->is_btn_press = true; 633 msec_val = jiffies_to_msecs(jiffies - mbhc->jiffies_atreport); 634 635 /* Too short, ignore button press */ 636 if (msec_val < MBHC_BUTTON_PRESS_THRESHOLD_MIN) 637 goto done; 638 639 /* If switch interrupt already kicked in, ignore button press */ 640 if (mbhc->in_swch_irq_handler) 641 goto done; 642 643 /* Plug isn't headset, ignore button press */ 644 if (mbhc->current_plug != MBHC_PLUG_TYPE_HEADSET) 645 goto done; 646 647 mask = wcd_mbhc_get_button_mask(mbhc); 648 mbhc->buttons_pressed |= mask; 649 if (schedule_delayed_work(&mbhc->mbhc_btn_dwork, msecs_to_jiffies(400)) == 0) 650 WARN(1, "Button pressed twice without release event\n"); 651 done: 652 mutex_unlock(&mbhc->lock); 653 return IRQ_HANDLED; 654 } 655 656 static irqreturn_t wcd_mbhc_btn_release_handler(int irq, void *data) 657 { 658 struct wcd_mbhc *mbhc = data; 659 int ret; 660 661 mutex_lock(&mbhc->lock); 662 if (mbhc->is_btn_press) 663 mbhc->is_btn_press = false; 664 else /* fake btn press */ 665 goto exit; 666 667 if (!(mbhc->buttons_pressed & WCD_MBHC_JACK_BUTTON_MASK)) 668 goto exit; 669 670 ret = wcd_cancel_btn_work(mbhc); 671 if (ret == 0) { /* Reporting long button release event */ 672 snd_soc_jack_report(mbhc->jack, 0, mbhc->buttons_pressed); 673 } else { 674 if (!mbhc->in_swch_irq_handler) { 675 /* Reporting btn press n Release */ 676 snd_soc_jack_report(mbhc->jack, mbhc->buttons_pressed, 677 mbhc->buttons_pressed); 678 snd_soc_jack_report(mbhc->jack, 0, mbhc->buttons_pressed); 679 } 680 } 681 mbhc->buttons_pressed &= ~WCD_MBHC_JACK_BUTTON_MASK; 682 exit: 683 mutex_unlock(&mbhc->lock); 684 685 return IRQ_HANDLED; 686 } 687 688 static irqreturn_t wcd_mbhc_hph_ocp_irq(struct wcd_mbhc *mbhc, bool hphr) 689 { 690 691 /* TODO Find a better way to report this to Userspace */ 692 dev_err(mbhc->dev, "MBHC Over Current on %s detected\n", 693 hphr ? "HPHR" : "HPHL"); 694 695 wcd_mbhc_write_field(mbhc, WCD_MBHC_OCP_FSM_EN, 0); 696 wcd_mbhc_write_field(mbhc, WCD_MBHC_OCP_FSM_EN, 1); 697 698 return IRQ_HANDLED; 699 } 700 701 static irqreturn_t wcd_mbhc_hphl_ocp_irq(int irq, void *data) 702 { 703 return wcd_mbhc_hph_ocp_irq(data, false); 704 } 705 706 static irqreturn_t wcd_mbhc_hphr_ocp_irq(int irq, void *data) 707 { 708 return wcd_mbhc_hph_ocp_irq(data, true); 709 } 710 711 static int wcd_mbhc_initialise(struct wcd_mbhc *mbhc) 712 { 713 struct snd_soc_component *component = mbhc->component; 714 715 mutex_lock(&mbhc->lock); 716 717 /* enable HS detection */ 718 if (mbhc->mbhc_cb->hph_pull_up_control_v2) 719 mbhc->mbhc_cb->hph_pull_up_control_v2(component, 720 HS_PULLUP_I_DEFAULT); 721 else if (mbhc->mbhc_cb->hph_pull_up_control) 722 mbhc->mbhc_cb->hph_pull_up_control(component, I_DEFAULT); 723 else 724 wcd_mbhc_write_field(mbhc, WCD_MBHC_HS_L_DET_PULL_UP_CTRL, 3); 725 726 wcd_mbhc_write_field(mbhc, WCD_MBHC_HPHL_PLUG_TYPE, mbhc->cfg->hphl_swh); 727 wcd_mbhc_write_field(mbhc, WCD_MBHC_GND_PLUG_TYPE, mbhc->cfg->gnd_swh); 728 wcd_mbhc_write_field(mbhc, WCD_MBHC_SW_HPH_LP_100K_TO_GND, 1); 729 if (mbhc->cfg->gnd_det_en && mbhc->mbhc_cb->mbhc_gnd_det_ctrl) 730 mbhc->mbhc_cb->mbhc_gnd_det_ctrl(component, true); 731 wcd_mbhc_write_field(mbhc, WCD_MBHC_HS_L_DET_PULL_UP_COMP_CTRL, 1); 732 733 wcd_mbhc_write_field(mbhc, WCD_MBHC_L_DET_EN, 1); 734 735 /* Insertion debounce set to 96ms */ 736 wcd_mbhc_write_field(mbhc, WCD_MBHC_INSREM_DBNC, 6); 737 738 /* Button Debounce set to 16ms */ 739 wcd_mbhc_write_field(mbhc, WCD_MBHC_BTN_DBNC, 2); 740 741 /* enable bias */ 742 mbhc->mbhc_cb->mbhc_bias(component, true); 743 /* enable MBHC clock */ 744 if (mbhc->mbhc_cb->clk_setup) 745 mbhc->mbhc_cb->clk_setup(component, true); 746 747 /* program HS_VREF value */ 748 wcd_program_hs_vref(mbhc); 749 750 wcd_program_btn_threshold(mbhc, false); 751 752 mutex_unlock(&mbhc->lock); 753 754 return 0; 755 } 756 757 static int wcd_mbhc_get_micbias(struct wcd_mbhc *mbhc) 758 { 759 int micbias = 0; 760 761 if (mbhc->mbhc_cb->get_micbias_val) { 762 mbhc->mbhc_cb->get_micbias_val(mbhc->component, &micbias); 763 } else { 764 u8 vout_ctl = 0; 765 /* Read MBHC Micbias (Mic Bias2) voltage */ 766 vout_ctl = wcd_mbhc_read_field(mbhc, WCD_MBHC_MICB2_VOUT); 767 /* Formula for getting micbias from vout 768 * micbias = 1.0V + VOUT_CTL * 50mV 769 */ 770 micbias = 1000 + (vout_ctl * 50); 771 } 772 return micbias; 773 } 774 775 static int wcd_get_voltage_from_adc(u8 val, int micbias) 776 { 777 /* Formula for calculating voltage from ADC 778 * Voltage = ADC_RESULT*12.5mV*V_MICBIAS/1.8 779 */ 780 return ((val * 125 * micbias)/(WCD_MBHC_ADC_MICBIAS_MV * 10)); 781 } 782 783 static int wcd_measure_adc_continuous(struct wcd_mbhc *mbhc) 784 { 785 u8 adc_result; 786 int output_mv; 787 int retry = 3; 788 u8 adc_en; 789 790 /* Pre-requisites for ADC continuous measurement */ 791 /* Read legacy electircal detection and disable */ 792 wcd_mbhc_write_field(mbhc, WCD_MBHC_ELECT_SCHMT_ISRC, 0x00); 793 /* Set ADC to continuous measurement */ 794 wcd_mbhc_write_field(mbhc, WCD_MBHC_ADC_MODE, 1); 795 /* Read ADC Enable bit to restore after adc measurement */ 796 adc_en = wcd_mbhc_read_field(mbhc, WCD_MBHC_ADC_EN); 797 /* Disable ADC_ENABLE bit */ 798 wcd_mbhc_write_field(mbhc, WCD_MBHC_ADC_EN, 0); 799 /* Disable MBHC FSM */ 800 wcd_mbhc_write_field(mbhc, WCD_MBHC_FSM_EN, 0); 801 /* Set the MUX selection to IN2P */ 802 wcd_mbhc_write_field(mbhc, WCD_MBHC_MUX_CTL, MUX_CTL_IN2P); 803 /* Enable MBHC FSM */ 804 wcd_mbhc_write_field(mbhc, WCD_MBHC_FSM_EN, 1); 805 /* Enable ADC_ENABLE bit */ 806 wcd_mbhc_write_field(mbhc, WCD_MBHC_ADC_EN, 1); 807 808 while (retry--) { 809 /* wait for 3 msec before reading ADC result */ 810 usleep_range(3000, 3100); 811 adc_result = wcd_mbhc_read_field(mbhc, WCD_MBHC_ADC_RESULT); 812 } 813 814 /* Restore ADC Enable */ 815 wcd_mbhc_write_field(mbhc, WCD_MBHC_ADC_EN, adc_en); 816 /* Get voltage from ADC result */ 817 output_mv = wcd_get_voltage_from_adc(adc_result, wcd_mbhc_get_micbias(mbhc)); 818 819 return output_mv; 820 } 821 822 static int wcd_measure_adc_once(struct wcd_mbhc *mbhc, int mux_ctl) 823 { 824 struct device *dev = mbhc->dev; 825 u8 adc_timeout = 0; 826 u8 adc_complete = 0; 827 u8 adc_result; 828 int retry = 6; 829 int ret; 830 int output_mv = 0; 831 u8 adc_en; 832 833 wcd_mbhc_write_field(mbhc, WCD_MBHC_ADC_MODE, 0); 834 /* Read ADC Enable bit to restore after adc measurement */ 835 adc_en = wcd_mbhc_read_field(mbhc, WCD_MBHC_ADC_EN); 836 /* Trigger ADC one time measurement */ 837 wcd_mbhc_write_field(mbhc, WCD_MBHC_ADC_EN, 0); 838 wcd_mbhc_write_field(mbhc, WCD_MBHC_FSM_EN, 0); 839 /* Set the appropriate MUX selection */ 840 wcd_mbhc_write_field(mbhc, WCD_MBHC_MUX_CTL, mux_ctl); 841 wcd_mbhc_write_field(mbhc, WCD_MBHC_FSM_EN, 1); 842 wcd_mbhc_write_field(mbhc, WCD_MBHC_ADC_EN, 1); 843 844 while (retry--) { 845 /* wait for 600usec to get adc results */ 846 usleep_range(600, 610); 847 848 /* check for ADC Timeout */ 849 adc_timeout = wcd_mbhc_read_field(mbhc, WCD_MBHC_ADC_TIMEOUT); 850 if (adc_timeout) 851 continue; 852 853 /* Read ADC complete bit */ 854 adc_complete = wcd_mbhc_read_field(mbhc, WCD_MBHC_ADC_COMPLETE); 855 if (!adc_complete) 856 continue; 857 858 /* Read ADC result */ 859 adc_result = wcd_mbhc_read_field(mbhc, WCD_MBHC_ADC_RESULT); 860 861 /* Get voltage from ADC result */ 862 output_mv = wcd_get_voltage_from_adc(adc_result, 863 wcd_mbhc_get_micbias(mbhc)); 864 break; 865 } 866 867 /* Restore ADC Enable */ 868 wcd_mbhc_write_field(mbhc, WCD_MBHC_ADC_EN, adc_en); 869 870 if (retry <= 0) { 871 dev_err(dev, "%s: adc complete: %d, adc timeout: %d\n", 872 __func__, adc_complete, adc_timeout); 873 ret = -EINVAL; 874 } else { 875 ret = output_mv; 876 } 877 878 return ret; 879 } 880 881 /* To determine if cross connection occurred */ 882 static int wcd_check_cross_conn(struct wcd_mbhc *mbhc) 883 { 884 u8 adc_mode, elect_ctl, adc_en, fsm_en; 885 int hphl_adc_res, hphr_adc_res; 886 bool is_cross_conn = false; 887 888 /* If PA is enabled, dont check for cross-connection */ 889 if (wcd_mbhc_read_field(mbhc, WCD_MBHC_HPH_PA_EN)) 890 return -EINVAL; 891 892 /* Read legacy electircal detection and disable */ 893 elect_ctl = wcd_mbhc_read_field(mbhc, WCD_MBHC_ELECT_SCHMT_ISRC); 894 wcd_mbhc_write_field(mbhc, WCD_MBHC_ELECT_SCHMT_ISRC, 0); 895 896 /* Read and set ADC to single measurement */ 897 adc_mode = wcd_mbhc_read_field(mbhc, WCD_MBHC_ADC_MODE); 898 /* Read ADC Enable bit to restore after adc measurement */ 899 adc_en = wcd_mbhc_read_field(mbhc, WCD_MBHC_ADC_EN); 900 /* Read FSM status */ 901 fsm_en = wcd_mbhc_read_field(mbhc, WCD_MBHC_FSM_EN); 902 903 /* Get adc result for HPH L */ 904 hphl_adc_res = wcd_measure_adc_once(mbhc, MUX_CTL_HPH_L); 905 if (hphl_adc_res < 0) 906 return hphl_adc_res; 907 908 /* Get adc result for HPH R in mV */ 909 hphr_adc_res = wcd_measure_adc_once(mbhc, MUX_CTL_HPH_R); 910 if (hphr_adc_res < 0) 911 return hphr_adc_res; 912 913 if (hphl_adc_res > HPHL_CROSS_CONN_THRESHOLD || 914 hphr_adc_res > HPHL_CROSS_CONN_THRESHOLD) 915 is_cross_conn = true; 916 917 wcd_mbhc_write_field(mbhc, WCD_MBHC_FSM_EN, 0); 918 /* Set the MUX selection to Auto */ 919 wcd_mbhc_write_field(mbhc, WCD_MBHC_MUX_CTL, MUX_CTL_AUTO); 920 wcd_mbhc_write_field(mbhc, WCD_MBHC_FSM_EN, 1); 921 /* Restore ADC Enable */ 922 wcd_mbhc_write_field(mbhc, WCD_MBHC_ADC_EN, adc_en); 923 /* Restore ADC mode */ 924 wcd_mbhc_write_field(mbhc, WCD_MBHC_ADC_MODE, adc_mode); 925 /* Restore FSM state */ 926 wcd_mbhc_write_field(mbhc, WCD_MBHC_FSM_EN, fsm_en); 927 /* Restore electrical detection */ 928 wcd_mbhc_write_field(mbhc, WCD_MBHC_ELECT_SCHMT_ISRC, elect_ctl); 929 930 return is_cross_conn; 931 } 932 933 static int wcd_mbhc_adc_get_hs_thres(struct wcd_mbhc *mbhc) 934 { 935 int hs_threshold, micbias_mv; 936 937 micbias_mv = wcd_mbhc_get_micbias(mbhc); 938 if (mbhc->cfg->hs_thr) { 939 if (mbhc->cfg->micb_mv == micbias_mv) 940 hs_threshold = mbhc->cfg->hs_thr; 941 else 942 hs_threshold = (mbhc->cfg->hs_thr * 943 micbias_mv) / mbhc->cfg->micb_mv; 944 } else { 945 hs_threshold = ((WCD_MBHC_ADC_HS_THRESHOLD_MV * 946 micbias_mv) / WCD_MBHC_ADC_MICBIAS_MV); 947 } 948 return hs_threshold; 949 } 950 951 static int wcd_mbhc_adc_get_hph_thres(struct wcd_mbhc *mbhc) 952 { 953 int hph_threshold, micbias_mv; 954 955 micbias_mv = wcd_mbhc_get_micbias(mbhc); 956 if (mbhc->cfg->hph_thr) { 957 if (mbhc->cfg->micb_mv == micbias_mv) 958 hph_threshold = mbhc->cfg->hph_thr; 959 else 960 hph_threshold = (mbhc->cfg->hph_thr * 961 micbias_mv) / mbhc->cfg->micb_mv; 962 } else { 963 hph_threshold = ((WCD_MBHC_ADC_HPH_THRESHOLD_MV * 964 micbias_mv) / WCD_MBHC_ADC_MICBIAS_MV); 965 } 966 return hph_threshold; 967 } 968 969 static void wcd_mbhc_adc_update_fsm_source(struct wcd_mbhc *mbhc, 970 enum wcd_mbhc_plug_type plug_type) 971 { 972 bool micbias2 = false; 973 974 switch (plug_type) { 975 case MBHC_PLUG_TYPE_HEADPHONE: 976 wcd_mbhc_write_field(mbhc, WCD_MBHC_BTN_ISRC_CTL, 3); 977 break; 978 case MBHC_PLUG_TYPE_HEADSET: 979 if (mbhc->mbhc_cb->micbias_enable_status) 980 micbias2 = mbhc->mbhc_cb->micbias_enable_status(mbhc->component, 981 MIC_BIAS_2); 982 983 if (!mbhc->is_hs_recording && !micbias2) 984 wcd_mbhc_write_field(mbhc, WCD_MBHC_BTN_ISRC_CTL, 3); 985 break; 986 default: 987 wcd_mbhc_write_field(mbhc, WCD_MBHC_BTN_ISRC_CTL, 0); 988 break; 989 990 } 991 } 992 993 static void wcd_mbhc_bcs_enable(struct wcd_mbhc *mbhc, int plug_type, bool enable) 994 { 995 switch (plug_type) { 996 case MBHC_PLUG_TYPE_HEADSET: 997 case MBHC_PLUG_TYPE_HEADPHONE: 998 if (mbhc->mbhc_cb->bcs_enable) 999 mbhc->mbhc_cb->bcs_enable(mbhc->component, enable); 1000 break; 1001 default: 1002 break; 1003 } 1004 } 1005 1006 static int wcd_mbhc_get_plug_from_adc(struct wcd_mbhc *mbhc, int adc_result) 1007 1008 { 1009 enum wcd_mbhc_plug_type plug_type; 1010 u32 hph_thr, hs_thr; 1011 1012 hs_thr = wcd_mbhc_adc_get_hs_thres(mbhc); 1013 hph_thr = wcd_mbhc_adc_get_hph_thres(mbhc); 1014 1015 if (adc_result < hph_thr) 1016 plug_type = MBHC_PLUG_TYPE_HEADPHONE; 1017 else if (adc_result > hs_thr) 1018 plug_type = MBHC_PLUG_TYPE_HIGH_HPH; 1019 else 1020 plug_type = MBHC_PLUG_TYPE_HEADSET; 1021 1022 return plug_type; 1023 } 1024 1025 static void wcd_correct_swch_plug(struct work_struct *work) 1026 { 1027 struct wcd_mbhc *mbhc; 1028 struct snd_soc_component *component; 1029 enum wcd_mbhc_plug_type plug_type = MBHC_PLUG_TYPE_INVALID; 1030 unsigned long timeout; 1031 int pt_gnd_mic_swap_cnt = 0; 1032 int output_mv, cross_conn, hs_threshold, try = 0; 1033 bool is_pa_on; 1034 1035 mbhc = container_of(work, struct wcd_mbhc, correct_plug_swch); 1036 component = mbhc->component; 1037 1038 hs_threshold = wcd_mbhc_adc_get_hs_thres(mbhc); 1039 1040 /* Mask ADC COMPLETE interrupt */ 1041 disable_irq_nosync(mbhc->intr_ids->mbhc_hs_ins_intr); 1042 1043 /* Check for cross connection */ 1044 do { 1045 cross_conn = wcd_check_cross_conn(mbhc); 1046 try++; 1047 } while (try < GND_MIC_SWAP_THRESHOLD); 1048 1049 if (cross_conn > 0) { 1050 plug_type = MBHC_PLUG_TYPE_GND_MIC_SWAP; 1051 dev_err(mbhc->dev, "cross connection found, Plug type %d\n", 1052 plug_type); 1053 goto correct_plug_type; 1054 } 1055 1056 /* Find plug type */ 1057 output_mv = wcd_measure_adc_continuous(mbhc); 1058 plug_type = wcd_mbhc_get_plug_from_adc(mbhc, output_mv); 1059 1060 /* 1061 * Report plug type if it is either headset or headphone 1062 * else start the 3 sec loop 1063 */ 1064 switch (plug_type) { 1065 case MBHC_PLUG_TYPE_HEADPHONE: 1066 wcd_mbhc_find_plug_and_report(mbhc, plug_type); 1067 break; 1068 case MBHC_PLUG_TYPE_HEADSET: 1069 wcd_mbhc_find_plug_and_report(mbhc, plug_type); 1070 wcd_mbhc_write_field(mbhc, WCD_MBHC_ADC_MODE, 0); 1071 wcd_mbhc_write_field(mbhc, WCD_MBHC_ADC_EN, 0); 1072 wcd_mbhc_write_field(mbhc, WCD_MBHC_DETECTION_DONE, 1); 1073 break; 1074 default: 1075 break; 1076 } 1077 1078 correct_plug_type: 1079 1080 /* Disable BCS slow insertion detection */ 1081 wcd_mbhc_bcs_enable(mbhc, plug_type, false); 1082 1083 timeout = jiffies + msecs_to_jiffies(HS_DETECT_PLUG_TIME_MS); 1084 1085 while (!time_after(jiffies, timeout)) { 1086 if (mbhc->hs_detect_work_stop) { 1087 wcd_micbias_disable(mbhc); 1088 goto exit; 1089 } 1090 1091 msleep(180); 1092 /* 1093 * Use ADC single mode to minimize the chance of missing out 1094 * btn press/release for HEADSET type during correct work. 1095 */ 1096 output_mv = wcd_measure_adc_once(mbhc, MUX_CTL_IN2P); 1097 plug_type = wcd_mbhc_get_plug_from_adc(mbhc, output_mv); 1098 is_pa_on = wcd_mbhc_read_field(mbhc, WCD_MBHC_HPH_PA_EN); 1099 1100 if ((output_mv <= hs_threshold) && !is_pa_on) { 1101 /* Check for cross connection*/ 1102 cross_conn = wcd_check_cross_conn(mbhc); 1103 if (cross_conn > 0) { /* cross-connection */ 1104 pt_gnd_mic_swap_cnt++; 1105 if (pt_gnd_mic_swap_cnt < GND_MIC_SWAP_THRESHOLD) 1106 continue; 1107 else 1108 plug_type = MBHC_PLUG_TYPE_GND_MIC_SWAP; 1109 } else if (!cross_conn) { /* no cross connection */ 1110 pt_gnd_mic_swap_cnt = 0; 1111 plug_type = wcd_mbhc_get_plug_from_adc(mbhc, output_mv); 1112 continue; 1113 } else if (cross_conn < 0) /* Error */ 1114 continue; 1115 1116 if (pt_gnd_mic_swap_cnt == GND_MIC_SWAP_THRESHOLD) { 1117 /* US_EU gpio present, flip switch */ 1118 if (mbhc->cfg->swap_gnd_mic) { 1119 if (mbhc->cfg->swap_gnd_mic(component, true)) 1120 continue; 1121 } 1122 } 1123 } 1124 1125 if (output_mv > hs_threshold) /* cable is extension cable */ 1126 plug_type = MBHC_PLUG_TYPE_HIGH_HPH; 1127 } 1128 1129 wcd_mbhc_bcs_enable(mbhc, plug_type, true); 1130 1131 if (plug_type == MBHC_PLUG_TYPE_HIGH_HPH) 1132 wcd_mbhc_write_field(mbhc, WCD_MBHC_ELECT_ISRC_EN, 1); 1133 1134 wcd_mbhc_write_field(mbhc, WCD_MBHC_ADC_MODE, 0); 1135 wcd_mbhc_write_field(mbhc, WCD_MBHC_ADC_EN, 0); 1136 wcd_mbhc_find_plug_and_report(mbhc, plug_type); 1137 1138 /* 1139 * Set DETECTION_DONE bit for HEADSET 1140 * so that btn press/release interrupt can be generated. 1141 * For other plug type, clear the bit. 1142 */ 1143 if (plug_type == MBHC_PLUG_TYPE_HEADSET) 1144 wcd_mbhc_write_field(mbhc, WCD_MBHC_DETECTION_DONE, 1); 1145 else 1146 wcd_mbhc_write_field(mbhc, WCD_MBHC_DETECTION_DONE, 0); 1147 1148 if (mbhc->mbhc_cb->mbhc_micbias_control) 1149 wcd_mbhc_adc_update_fsm_source(mbhc, plug_type); 1150 1151 exit: 1152 if (mbhc->mbhc_cb->mbhc_micbias_control/* && !mbhc->micbias_enable*/) 1153 mbhc->mbhc_cb->mbhc_micbias_control(component, MIC_BIAS_2, MICB_DISABLE); 1154 1155 /* 1156 * If plug type is corrected from special headset to headphone, 1157 * clear the micbias enable flag, set micbias back to 1.8V and 1158 * disable micbias. 1159 */ 1160 if (plug_type == MBHC_PLUG_TYPE_HEADPHONE) { 1161 wcd_micbias_disable(mbhc); 1162 /* 1163 * Enable ADC COMPLETE interrupt for HEADPHONE. 1164 * Btn release may happen after the correct work, ADC COMPLETE 1165 * interrupt needs to be captured to correct plug type. 1166 */ 1167 enable_irq(mbhc->intr_ids->mbhc_hs_ins_intr); 1168 } 1169 1170 if (mbhc->mbhc_cb->hph_pull_down_ctrl) 1171 mbhc->mbhc_cb->hph_pull_down_ctrl(component, true); 1172 } 1173 1174 static irqreturn_t wcd_mbhc_adc_hs_rem_irq(int irq, void *data) 1175 { 1176 struct wcd_mbhc *mbhc = data; 1177 unsigned long timeout; 1178 int adc_threshold, output_mv, retry = 0; 1179 bool hphpa_on = false; 1180 1181 mutex_lock(&mbhc->lock); 1182 timeout = jiffies + msecs_to_jiffies(WCD_FAKE_REMOVAL_MIN_PERIOD_MS); 1183 adc_threshold = wcd_mbhc_adc_get_hs_thres(mbhc); 1184 1185 do { 1186 retry++; 1187 /* 1188 * read output_mv every 10ms to look for 1189 * any change in IN2_P 1190 */ 1191 usleep_range(10000, 10100); 1192 output_mv = wcd_measure_adc_once(mbhc, MUX_CTL_IN2P); 1193 1194 /* Check for fake removal */ 1195 if ((output_mv <= adc_threshold) && retry > FAKE_REM_RETRY_ATTEMPTS) 1196 goto exit; 1197 } while (!time_after(jiffies, timeout)); 1198 1199 /* 1200 * ADC COMPLETE and ELEC_REM interrupts are both enabled for 1201 * HEADPHONE, need to reject the ADC COMPLETE interrupt which 1202 * follows ELEC_REM one when HEADPHONE is removed. 1203 */ 1204 if (mbhc->current_plug == MBHC_PLUG_TYPE_HEADPHONE) 1205 mbhc->extn_cable_hph_rem = true; 1206 1207 wcd_mbhc_write_field(mbhc, WCD_MBHC_DETECTION_DONE, 0); 1208 wcd_mbhc_write_field(mbhc, WCD_MBHC_ADC_MODE, 0); 1209 wcd_mbhc_write_field(mbhc, WCD_MBHC_ADC_EN, 0); 1210 wcd_mbhc_elec_hs_report_unplug(mbhc); 1211 wcd_mbhc_write_field(mbhc, WCD_MBHC_BTN_ISRC_CTL, 0); 1212 1213 if (hphpa_on) { 1214 hphpa_on = false; 1215 wcd_mbhc_write_field(mbhc, WCD_MBHC_HPH_PA_EN, 3); 1216 } 1217 exit: 1218 mutex_unlock(&mbhc->lock); 1219 return IRQ_HANDLED; 1220 } 1221 1222 static irqreturn_t wcd_mbhc_adc_hs_ins_irq(int irq, void *data) 1223 { 1224 struct wcd_mbhc *mbhc = data; 1225 u8 clamp_state = 0; 1226 u8 clamp_retry = WCD_MBHC_FAKE_INS_RETRY; 1227 1228 /* 1229 * ADC COMPLETE and ELEC_REM interrupts are both enabled for HEADPHONE, 1230 * need to reject the ADC COMPLETE interrupt which follows ELEC_REM one 1231 * when HEADPHONE is removed. 1232 */ 1233 if (mbhc->extn_cable_hph_rem == true) { 1234 mbhc->extn_cable_hph_rem = false; 1235 return IRQ_HANDLED; 1236 } 1237 1238 do { 1239 clamp_state = wcd_mbhc_read_field(mbhc, WCD_MBHC_IN2P_CLAMP_STATE); 1240 if (clamp_state) 1241 return IRQ_HANDLED; 1242 /* 1243 * check clamp for 120ms but at 30ms chunks to leave 1244 * room for other interrupts to be processed 1245 */ 1246 usleep_range(30000, 30100); 1247 } while (--clamp_retry); 1248 1249 /* 1250 * If current plug is headphone then there is no chance to 1251 * get ADC complete interrupt, so connected cable should be 1252 * headset not headphone. 1253 */ 1254 if (mbhc->current_plug == MBHC_PLUG_TYPE_HEADPHONE) { 1255 disable_irq_nosync(mbhc->intr_ids->mbhc_hs_ins_intr); 1256 wcd_mbhc_write_field(mbhc, WCD_MBHC_DETECTION_DONE, 1); 1257 wcd_mbhc_find_plug_and_report(mbhc, MBHC_PLUG_TYPE_HEADSET); 1258 return IRQ_HANDLED; 1259 } 1260 1261 return IRQ_HANDLED; 1262 } 1263 1264 int wcd_mbhc_get_impedance(struct wcd_mbhc *mbhc, uint32_t *zl, uint32_t *zr) 1265 { 1266 *zl = mbhc->zl; 1267 *zr = mbhc->zr; 1268 1269 if (*zl && *zr) 1270 return 0; 1271 else 1272 return -EINVAL; 1273 } 1274 EXPORT_SYMBOL(wcd_mbhc_get_impedance); 1275 1276 void wcd_mbhc_set_hph_type(struct wcd_mbhc *mbhc, int hph_type) 1277 { 1278 mbhc->hph_type = hph_type; 1279 } 1280 EXPORT_SYMBOL(wcd_mbhc_set_hph_type); 1281 1282 int wcd_mbhc_get_hph_type(struct wcd_mbhc *mbhc) 1283 { 1284 return mbhc->hph_type; 1285 } 1286 EXPORT_SYMBOL(wcd_mbhc_get_hph_type); 1287 1288 int wcd_mbhc_start(struct wcd_mbhc *mbhc, struct wcd_mbhc_config *cfg, 1289 struct snd_soc_jack *jack) 1290 { 1291 if (!mbhc || !cfg || !jack) 1292 return -EINVAL; 1293 1294 mbhc->cfg = cfg; 1295 mbhc->jack = jack; 1296 1297 return wcd_mbhc_initialise(mbhc); 1298 } 1299 EXPORT_SYMBOL(wcd_mbhc_start); 1300 1301 void wcd_mbhc_stop(struct wcd_mbhc *mbhc) 1302 { 1303 mbhc->current_plug = MBHC_PLUG_TYPE_NONE; 1304 mbhc->hph_status = 0; 1305 disable_irq_nosync(mbhc->intr_ids->hph_left_ocp); 1306 disable_irq_nosync(mbhc->intr_ids->hph_right_ocp); 1307 } 1308 EXPORT_SYMBOL(wcd_mbhc_stop); 1309 1310 int wcd_dt_parse_mbhc_data(struct device *dev, struct wcd_mbhc_config *cfg) 1311 { 1312 struct device_node *np = dev->of_node; 1313 int ret, i, microvolt; 1314 1315 if (of_property_read_bool(np, "qcom,hphl-jack-type-normally-closed")) 1316 cfg->hphl_swh = false; 1317 else 1318 cfg->hphl_swh = true; 1319 1320 if (of_property_read_bool(np, "qcom,ground-jack-type-normally-closed")) 1321 cfg->gnd_swh = false; 1322 else 1323 cfg->gnd_swh = true; 1324 1325 ret = of_property_read_u32(np, "qcom,mbhc-headset-vthreshold-microvolt", 1326 µvolt); 1327 if (ret) 1328 dev_dbg(dev, "missing qcom,mbhc-hs-mic-max-vthreshold--microvolt in dt node\n"); 1329 else 1330 cfg->hs_thr = microvolt/1000; 1331 1332 ret = of_property_read_u32(np, "qcom,mbhc-headphone-vthreshold-microvolt", 1333 µvolt); 1334 if (ret) 1335 dev_dbg(dev, "missing qcom,mbhc-hs-mic-min-vthreshold-microvolt entry\n"); 1336 else 1337 cfg->hph_thr = microvolt/1000; 1338 1339 ret = of_property_read_u32_array(np, 1340 "qcom,mbhc-buttons-vthreshold-microvolt", 1341 &cfg->btn_high[0], 1342 WCD_MBHC_DEF_BUTTONS); 1343 if (ret) 1344 dev_err(dev, "missing qcom,mbhc-buttons-vthreshold-microvolt entry\n"); 1345 1346 for (i = 0; i < WCD_MBHC_DEF_BUTTONS; i++) { 1347 if (ret) /* default voltage */ 1348 cfg->btn_high[i] = 500000; 1349 else 1350 /* Micro to Milli Volts */ 1351 cfg->btn_high[i] = cfg->btn_high[i]/1000; 1352 } 1353 1354 return 0; 1355 } 1356 EXPORT_SYMBOL(wcd_dt_parse_mbhc_data); 1357 1358 struct wcd_mbhc *wcd_mbhc_init(struct snd_soc_component *component, 1359 const struct wcd_mbhc_cb *mbhc_cb, 1360 const struct wcd_mbhc_intr *intr_ids, 1361 struct wcd_mbhc_field *fields, 1362 bool impedance_det_en) 1363 { 1364 struct device *dev = component->dev; 1365 struct wcd_mbhc *mbhc; 1366 int ret; 1367 1368 if (!intr_ids || !fields || !mbhc_cb || !mbhc_cb->mbhc_bias || !mbhc_cb->set_btn_thr) { 1369 dev_err(dev, "%s: Insufficient mbhc configuration\n", __func__); 1370 return ERR_PTR(-EINVAL); 1371 } 1372 1373 mbhc = devm_kzalloc(dev, sizeof(*mbhc), GFP_KERNEL); 1374 if (!mbhc) 1375 return ERR_PTR(-ENOMEM); 1376 1377 mbhc->component = component; 1378 mbhc->dev = dev; 1379 mbhc->intr_ids = intr_ids; 1380 mbhc->mbhc_cb = mbhc_cb; 1381 mbhc->fields = fields; 1382 mbhc->mbhc_detection_logic = WCD_DETECTION_ADC; 1383 1384 if (mbhc_cb->compute_impedance) 1385 mbhc->impedance_detect = impedance_det_en; 1386 1387 INIT_DELAYED_WORK(&mbhc->mbhc_btn_dwork, wcd_btn_long_press_fn); 1388 1389 mutex_init(&mbhc->lock); 1390 1391 INIT_WORK(&mbhc->correct_plug_swch, wcd_correct_swch_plug); 1392 1393 ret = devm_request_threaded_irq(dev, mbhc->intr_ids->mbhc_sw_intr, NULL, 1394 wcd_mbhc_mech_plug_detect_irq, 1395 IRQF_ONESHOT | IRQF_TRIGGER_RISING, 1396 "mbhc sw intr", mbhc); 1397 if (ret) 1398 goto err; 1399 1400 ret = devm_request_threaded_irq(dev, mbhc->intr_ids->mbhc_btn_press_intr, NULL, 1401 wcd_mbhc_btn_press_handler, 1402 IRQF_ONESHOT | IRQF_TRIGGER_RISING, 1403 "Button Press detect", mbhc); 1404 if (ret) 1405 goto err; 1406 1407 ret = devm_request_threaded_irq(dev, mbhc->intr_ids->mbhc_btn_release_intr, NULL, 1408 wcd_mbhc_btn_release_handler, 1409 IRQF_ONESHOT | IRQF_TRIGGER_RISING, 1410 "Button Release detect", mbhc); 1411 if (ret) 1412 goto err; 1413 1414 ret = devm_request_threaded_irq(dev, mbhc->intr_ids->mbhc_hs_ins_intr, NULL, 1415 wcd_mbhc_adc_hs_ins_irq, 1416 IRQF_ONESHOT | IRQF_TRIGGER_RISING, 1417 "Elect Insert", mbhc); 1418 if (ret) 1419 goto err; 1420 1421 disable_irq_nosync(mbhc->intr_ids->mbhc_hs_ins_intr); 1422 1423 ret = devm_request_threaded_irq(dev, mbhc->intr_ids->mbhc_hs_rem_intr, NULL, 1424 wcd_mbhc_adc_hs_rem_irq, 1425 IRQF_ONESHOT | IRQF_TRIGGER_RISING, 1426 "Elect Remove", mbhc); 1427 if (ret) 1428 goto err; 1429 1430 disable_irq_nosync(mbhc->intr_ids->mbhc_hs_rem_intr); 1431 1432 ret = devm_request_threaded_irq(dev, mbhc->intr_ids->hph_left_ocp, NULL, 1433 wcd_mbhc_hphl_ocp_irq, 1434 IRQF_ONESHOT | IRQF_TRIGGER_RISING, 1435 "HPH_L OCP detect", mbhc); 1436 if (ret) 1437 goto err; 1438 1439 ret = devm_request_threaded_irq(dev, mbhc->intr_ids->hph_right_ocp, NULL, 1440 wcd_mbhc_hphr_ocp_irq, 1441 IRQF_ONESHOT | IRQF_TRIGGER_RISING, 1442 "HPH_R OCP detect", mbhc); 1443 if (ret) 1444 goto err; 1445 1446 return mbhc; 1447 err: 1448 dev_err(dev, "Failed to request mbhc interrupts %d\n", ret); 1449 1450 return ERR_PTR(ret); 1451 } 1452 EXPORT_SYMBOL(wcd_mbhc_init); 1453 1454 void wcd_mbhc_deinit(struct wcd_mbhc *mbhc) 1455 { 1456 mutex_lock(&mbhc->lock); 1457 wcd_cancel_hs_detect_plug(mbhc, &mbhc->correct_plug_swch); 1458 mutex_unlock(&mbhc->lock); 1459 } 1460 EXPORT_SYMBOL(wcd_mbhc_deinit); 1461 1462 static int __init mbhc_init(void) 1463 { 1464 return 0; 1465 } 1466 1467 static void __exit mbhc_exit(void) 1468 { 1469 } 1470 1471 module_init(mbhc_init); 1472 module_exit(mbhc_exit); 1473 1474 MODULE_DESCRIPTION("wcd MBHC v2 module"); 1475 MODULE_LICENSE("GPL"); 1476