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
wcd_mbhc_write_field(const struct wcd_mbhc * mbhc,int field,int val)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
wcd_mbhc_read_field(const struct wcd_mbhc * mbhc,int field)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
wcd_program_hs_vref(struct wcd_mbhc * mbhc)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
wcd_program_btn_threshold(const struct wcd_mbhc * mbhc,bool micbias)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
wcd_mbhc_curr_micbias_control(const struct wcd_mbhc * mbhc,const enum wcd_mbhc_cs_mb_en_flag cs_mb_en)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
wcd_mbhc_event_notify(struct wcd_mbhc * mbhc,unsigned long event)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
wcd_cancel_btn_work(struct wcd_mbhc * mbhc)266 static int wcd_cancel_btn_work(struct wcd_mbhc *mbhc)
267 {
268 return cancel_delayed_work_sync(&mbhc->mbhc_btn_dwork);
269 }
270
wcd_micbias_disable(struct wcd_mbhc * mbhc)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
wcd_mbhc_report_plug_removal(struct wcd_mbhc * mbhc,enum snd_jack_types jack_type)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
wcd_mbhc_compute_impedance(struct wcd_mbhc * mbhc)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
wcd_mbhc_report_plug_insertion(struct wcd_mbhc * mbhc,enum snd_jack_types jack_type)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
wcd_mbhc_report_plug(struct wcd_mbhc * mbhc,int insertion,enum snd_jack_types jack_type)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
wcd_cancel_hs_detect_plug(struct wcd_mbhc * mbhc,struct work_struct * work)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
wcd_mbhc_cancel_pending_work(struct wcd_mbhc * mbhc)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
wcd_mbhc_elec_hs_report_unplug(struct wcd_mbhc * mbhc)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
wcd_mbhc_find_plug_and_report(struct wcd_mbhc * mbhc,enum wcd_mbhc_plug_type plug_type)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
wcd_schedule_hs_detect_plug(struct wcd_mbhc * mbhc,struct work_struct * work)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
wcd_mbhc_adc_detect_plug_type(struct wcd_mbhc * mbhc)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
wcd_mbhc_mech_plug_detect_irq(int irq,void * data)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
wcd_mbhc_get_button_mask(struct wcd_mbhc * mbhc)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
wcd_btn_long_press_fn(struct work_struct * work)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
wcd_mbhc_btn_press_handler(int irq,void * data)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
wcd_mbhc_btn_release_handler(int irq,void * data)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
wcd_mbhc_hph_ocp_irq(struct wcd_mbhc * mbhc,bool hphr)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
wcd_mbhc_hphl_ocp_irq(int irq,void * data)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
wcd_mbhc_hphr_ocp_irq(int irq,void * data)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
wcd_mbhc_initialise(struct wcd_mbhc * mbhc)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
wcd_mbhc_get_micbias(struct wcd_mbhc * mbhc)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
wcd_get_voltage_from_adc(u8 val,int micbias)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
wcd_measure_adc_continuous(struct wcd_mbhc * mbhc)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
wcd_measure_adc_once(struct wcd_mbhc * mbhc,int mux_ctl)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 */
wcd_check_cross_conn(struct wcd_mbhc * mbhc)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
wcd_mbhc_adc_get_hs_thres(struct wcd_mbhc * mbhc)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
wcd_mbhc_adc_get_hph_thres(struct wcd_mbhc * mbhc)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
wcd_mbhc_adc_update_fsm_source(struct wcd_mbhc * mbhc,enum wcd_mbhc_plug_type plug_type)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
wcd_mbhc_bcs_enable(struct wcd_mbhc * mbhc,int plug_type,bool enable)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
wcd_mbhc_get_plug_from_adc(struct wcd_mbhc * mbhc,int adc_result)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
wcd_correct_swch_plug(struct work_struct * work)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
wcd_mbhc_adc_hs_rem_irq(int irq,void * data)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
wcd_mbhc_adc_hs_ins_irq(int irq,void * data)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
wcd_mbhc_get_impedance(struct wcd_mbhc * mbhc,uint32_t * zl,uint32_t * zr)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
wcd_mbhc_set_hph_type(struct wcd_mbhc * mbhc,int hph_type)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
wcd_mbhc_get_hph_type(struct wcd_mbhc * mbhc)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
wcd_mbhc_start(struct wcd_mbhc * mbhc,struct wcd_mbhc_config * cfg,struct snd_soc_jack * jack)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
wcd_mbhc_stop(struct wcd_mbhc * mbhc)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
wcd_dt_parse_mbhc_data(struct device * dev,struct wcd_mbhc_config * cfg)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
wcd_mbhc_init(struct snd_soc_component * component,const struct wcd_mbhc_cb * mbhc_cb,const struct wcd_mbhc_intr * intr_ids,struct wcd_mbhc_field * fields,bool impedance_det_en)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
wcd_mbhc_deinit(struct wcd_mbhc * mbhc)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
mbhc_init(void)1462 static int __init mbhc_init(void)
1463 {
1464 return 0;
1465 }
1466
mbhc_exit(void)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