// SPDX-License-Identifier: GPL-2.0-only
// Copyright (c) 2015-2021, The Linux Foundation. All rights reserved.
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/device.h>
#include <linux/pm_runtime.h>
#include <linux/printk.h>
#include <linux/delay.h>
#include <linux/kernel.h>
#include <sound/soc.h>
#include <sound/jack.h>
#include "wcd-mbhc-v2.h"
#define HS_DETECT_PLUG_TIME_MS (3 * 1000)
#define MBHC_BUTTON_PRESS_THRESHOLD_MIN 250
#define GND_MIC_SWAP_THRESHOLD 4
#define GND_MIC_USBC_SWAP_THRESHOLD 2
#define WCD_FAKE_REMOVAL_MIN_PERIOD_MS 100
#define HPHL_CROSS_CONN_THRESHOLD 100
#define HS_VREF_MIN_VAL 1400
#define FAKE_REM_RETRY_ATTEMPTS 3
#define WCD_MBHC_ADC_HS_THRESHOLD_MV 1700
#define WCD_MBHC_ADC_HPH_THRESHOLD_MV 75
#define WCD_MBHC_ADC_MICBIAS_MV 1800
#define WCD_MBHC_FAKE_INS_RETRY 4
#define WCD_MBHC_JACK_MASK (SND_JACK_HEADSET | SND_JACK_LINEOUT | \
SND_JACK_MECHANICAL)
#define WCD_MBHC_JACK_BUTTON_MASK (SND_JACK_BTN_0 | SND_JACK_BTN_1 | \
SND_JACK_BTN_2 | SND_JACK_BTN_3 | \
SND_JACK_BTN_4 | SND_JACK_BTN_5)
enum wcd_mbhc_adc_mux_ctl {
MUX_CTL_AUTO = 0,
MUX_CTL_IN2P,
MUX_CTL_IN3P,
MUX_CTL_IN4P,
MUX_CTL_HPH_L,
MUX_CTL_HPH_R,
MUX_CTL_NONE,
};
struct wcd_mbhc {
struct device *dev;
struct snd_soc_component *component;
struct snd_soc_jack *jack;
struct wcd_mbhc_config *cfg;
const struct wcd_mbhc_cb *mbhc_cb;
const struct wcd_mbhc_intr *intr_ids;
const struct wcd_mbhc_field *fields;
/* Delayed work to report long button press */
struct delayed_work mbhc_btn_dwork;
/* Work to handle plug report */
struct work_struct mbhc_plug_detect_work;
/* Work to correct accessory type */
struct work_struct correct_plug_swch;
struct mutex lock;
int buttons_pressed;
u32 hph_status; /* track headhpone status */
u8 current_plug;
unsigned int swap_thr;
bool is_btn_press;
bool in_swch_irq_handler;
bool hs_detect_work_stop;
bool is_hs_recording;
bool extn_cable_hph_rem;
bool force_linein;
bool impedance_detect;
unsigned long event_state;
unsigned long jiffies_atreport;
/* impedance of hphl and hphr */
uint32_t zl, zr;
/* Holds type of Headset - Mono/Stereo */
enum wcd_mbhc_hph_type hph_type;
/* Holds mbhc detection method - ADC/Legacy */
int mbhc_detection_logic;
};
static inline int wcd_mbhc_write_field(const struct wcd_mbhc *mbhc,
int field, int val)
{
if (!mbhc->fields[field].reg)
return 0;
return snd_soc_component_write_field(mbhc->component,
mbhc->fields[field].reg,
mbhc->fields[field].mask, val);
}
static inline int wcd_mbhc_read_field(const struct wcd_mbhc *mbhc, int field)
{
if (!mbhc->fields[field].reg)
return 0;
return snd_soc_component_read_field(mbhc->component,
mbhc->fields[field].reg,
mbhc->fields[field].mask);
}
static void wcd_program_hs_vref(struct wcd_mbhc *mbhc)
{
u32 reg_val = ((mbhc->cfg->v_hs_max - HS_VREF_MIN_VAL) / 100);
wcd_mbhc_write_field(mbhc, WCD_MBHC_HS_VREF, reg_val);
}
static void wcd_program_btn_threshold(const struct wcd_mbhc *mbhc, bool micbias)
{
struct snd_soc_component *component = mbhc->component;
mbhc->mbhc_cb->set_btn_thr(component, mbhc->cfg->btn_low,
mbhc->cfg->btn_high,
mbhc->cfg->num_btn, micbias);
}
static void wcd_mbhc_curr_micbias_control(const struct wcd_mbhc *mbhc,
const enum wcd_mbhc_cs_mb_en_flag cs_mb_en)
{
/*
* Some codecs handle micbias/pullup enablement in codec
* drivers itself and micbias is not needed for regular
* plug type detection. So if micbias_control callback function
* is defined, just return.
*/
if (mbhc->mbhc_cb->mbhc_micbias_control)
return;
switch (cs_mb_en) {
case WCD_MBHC_EN_CS:
wcd_mbhc_write_field(mbhc, WCD_MBHC_MICB_CTRL, 0);
wcd_mbhc_write_field(mbhc, WCD_MBHC_BTN_ISRC_CTL, 3);
/* Program Button threshold registers as per CS */
wcd_program_btn_threshold(mbhc, false);
break;
case WCD_MBHC_EN_MB:
wcd_mbhc_write_field(mbhc, WCD_MBHC_BTN_ISRC_CTL, 0);
wcd_mbhc_write_field(mbhc, WCD_MBHC_FSM_EN, 1);
/* Disable PULL_UP_EN & enable MICBIAS */
wcd_mbhc_write_field(mbhc, WCD_MBHC_MICB_CTRL, 2);
/* Program Button threshold registers as per MICBIAS */
wcd_program_btn_threshold(mbhc, true);
break;
case WCD_MBHC_EN_PULLUP:
wcd_mbhc_write_field(mbhc, WCD_MBHC_BTN_ISRC_CTL, 3);
wcd_mbhc_write_field(mbhc, WCD_MBHC_FSM_EN, 1);
wcd_mbhc_write_field(mbhc, WCD_MBHC_MICB_CTRL, 1);
/* Program Button threshold registers as per MICBIAS */
wcd_program_btn_threshold(mbhc, true);
break;
case WCD_MBHC_EN_NONE:
wcd_mbhc_write_field(mbhc, WCD_MBHC_BTN_ISRC_CTL, 0);
wcd_mbhc_write_field(mbhc, WCD_MBHC_FSM_EN, 1);
wcd_mbhc_write_field(mbhc, WCD_MBHC_MICB_CTRL, 0);
break;
default:
dev_err(mbhc->dev, "%s: Invalid parameter", __func__);
break;
}
}
int wcd_mbhc_event_notify(struct wcd_mbhc *mbhc, unsigned long event)
{
struct snd_soc_component *component;
bool micbias2 = false;
if (!mbhc)
return 0;
component = mbhc->component;
if (mbhc->mbhc_cb->micbias_enable_status)
micbias2 = mbhc->mbhc_cb->micbias_enable_status(component, MIC_BIAS_2);
switch (event) {
/* MICBIAS usage change */
case WCD_EVENT_POST_DAPM_MICBIAS_2_ON:
mbhc->is_hs_recording = true;
break;
case WCD_EVENT_POST_MICBIAS_2_ON:
/* Disable current source if micbias2 enabled */
if (mbhc->mbhc_cb->mbhc_micbias_control) {
if (wcd_mbhc_read_field(mbhc, WCD_MBHC_FSM_EN))
wcd_mbhc_write_field(mbhc, WCD_MBHC_BTN_ISRC_CTL, 0);
} else {
mbhc->is_hs_recording = true;
wcd_mbhc_curr_micbias_control(mbhc, WCD_MBHC_EN_MB);
}
break;
case WCD_EVENT_PRE_MICBIAS_2_OFF:
/*
* Before MICBIAS_2 is turned off, if FSM is enabled,
* make sure current source is enabled so as to detect
* button press/release events
*/
if (mbhc->mbhc_cb->mbhc_micbias_control/* && !mbhc->micbias_enable*/) {
if (wcd_mbhc_read_field(mbhc, WCD_MBHC_FSM_EN))
wcd_mbhc_write_field(mbhc, WCD_MBHC_BTN_ISRC_CTL, 3);
}
break;
/* MICBIAS usage change */
case WCD_EVENT_POST_DAPM_MICBIAS_2_OFF:
mbhc->is_hs_recording = false;
break;
case WCD_EVENT_POST_MICBIAS_2_OFF:
if (!mbhc->mbhc_cb->mbhc_micbias_control)
mbhc->is_hs_recording = false;
/* Enable PULL UP if PA's are enabled */
if ((test_bit(WCD_MBHC_EVENT_PA_HPHL, &mbhc->event_state)) ||
(test_bit(WCD_MBHC_EVENT_PA_HPHR, &mbhc->event_state)))
/* enable pullup and cs, disable mb */
wcd_mbhc_curr_micbias_control(mbhc, WCD_MBHC_EN_PULLUP);
else
/* enable current source and disable mb, pullup*/
wcd_mbhc_curr_micbias_control(mbhc, WCD_MBHC_EN_CS);
break;
case WCD_EVENT_POST_HPHL_PA_OFF:
clear_bit(WCD_MBHC_EVENT_PA_HPHL, &mbhc->event_state);
/* check if micbias is enabled */
if (micbias2)
/* Disable cs, pullup & enable micbias */
wcd_mbhc_curr_micbias_control(mbhc, WCD_MBHC_EN_MB);
else
/* Disable micbias, pullup & enable cs */
wcd_mbhc_curr_micbias_control(mbhc, WCD_MBHC_EN_CS);
break;
case WCD_EVENT_POST_HPHR_PA_OFF:
clear_bit(WCD_MBHC_EVENT_PA_HPHR, &mbhc->event_state);
/* check if micbias is enabled */
if (micbias2)
/* Disable cs, pullup & enable micbias */
wcd_mbhc_curr_micbias_control(mbhc, WCD_MBHC_EN_MB);
else
/* Disable micbias, pullup & enable cs */
wcd_mbhc_curr_micbias_control(mbhc, WCD_MBHC_EN_CS);
break;
case WCD_EVENT_PRE_HPHL_PA_ON:
set_bit(WCD_MBHC_EVENT_PA_HPHL, &mbhc->event_state);
/* check if micbias is enabled */
if (micbias2)
/* Disable cs, pullup & enable micbias */
wcd_mbhc_curr_micbias_control(mbhc, WCD_MBHC_EN_MB);
else
/* Disable micbias, enable pullup & cs */
wcd_mbhc_curr_micbias_control(mbhc, WCD_MBHC_EN_PULLUP);
break;
case WCD_EVENT_PRE_HPHR_PA_ON:
set_bit(WCD_MBHC_EVENT_PA_HPHR, &mbhc->event_state);
/* check if micbias is enabled */
if (micbias2)
/* Disable cs, pullup & enable micbias */
wcd_mbhc_curr_micbias_control(mbhc, WCD_MBHC_EN_MB);
else
/* Disable micbias, enable pullup & cs */
wcd_mbhc_curr_micbias_control(mbhc, WCD_MBHC_EN_PULLUP);
break;
default:
break;
}
return 0;
}
EXPORT_SYMBOL_GPL(wcd_mbhc_event_notify);
static int wcd_cancel_btn_work(struct wcd_mbhc *mbhc)
{
return cancel_delayed_work_sync(&mbhc->mbhc_btn_dwork);
}
static void wcd_micbias_disable(struct wcd_mbhc *mbhc)
{
struct snd_soc_component *component = mbhc->component;
if (mbhc->mbhc_cb->mbhc_micbias_control)
mbhc->mbhc_cb->mbhc_micbias_control(component, MIC_BIAS_2, MICB_DISABLE);
if (mbhc->mbhc_cb->mbhc_micb_ctrl_thr_mic)
mbhc->mbhc_cb->mbhc_micb_ctrl_thr_mic(component, MIC_BIAS_2, false);
if (mbhc->mbhc_cb->set_micbias_value) {
mbhc->mbhc_cb->set_micbias_value(component);
wcd_mbhc_write_field(mbhc, WCD_MBHC_MICB_CTRL, 0);
}
}
static void wcd_mbhc_report_plug_removal(struct wcd_mbhc *mbhc,
enum snd_jack_types jack_type)
{
mbhc->hph_status &= ~jack_type;
/*
* cancel possibly scheduled btn work and
* report release if we reported button press
*/
if (!wcd_cancel_btn_work(mbhc) && mbhc->buttons_pressed) {
snd_soc_jack_report(mbhc->jack, 0, mbhc->buttons_pressed);
mbhc->buttons_pressed &= ~WCD_MBHC_JACK_BUTTON_MASK;
}
wcd_micbias_disable(mbhc);
mbhc->hph_type = WCD_MBHC_HPH_NONE;
mbhc->zl = mbhc->zr = 0;
snd_soc_jack_report(mbhc->jack, mbhc->hph_status, WCD_MBHC_JACK_MASK);
mbhc->current_plug = MBHC_PLUG_TYPE_NONE;
mbhc->force_linein = false;
}
static void wcd_mbhc_compute_impedance(struct wcd_mbhc *mbhc)
{
if (!mbhc->impedance_detect)
return;
if (mbhc->cfg->linein_th != 0) {
u8 fsm_en = wcd_mbhc_read_field(mbhc, WCD_MBHC_FSM_EN);
/* Set MUX_CTL to AUTO for Z-det */
wcd_mbhc_write_field(mbhc, WCD_MBHC_FSM_EN, 0);
wcd_mbhc_write_field(mbhc, WCD_MBHC_MUX_CTL, MUX_CTL_AUTO);
wcd_mbhc_write_field(mbhc, WCD_MBHC_FSM_EN, 1);
mbhc->mbhc_cb->compute_impedance(mbhc->component, &mbhc->zl, &mbhc->zr);
wcd_mbhc_write_field(mbhc, WCD_MBHC_FSM_EN, fsm_en);
}
}
static void wcd_mbhc_report_plug_insertion(struct wcd_mbhc *mbhc,
enum snd_jack_types jack_type)
{
bool is_pa_on;
/*
* Report removal of current jack type.
* Headphone to headset shouldn't report headphone
* removal.
*/
if (mbhc->current_plug == MBHC_PLUG_TYPE_HEADSET &&
jack_type == SND_JACK_HEADPHONE)
mbhc->hph_status &= ~SND_JACK_HEADSET;
/* Report insertion */
switch (jack_type) {
case SND_JACK_HEADPHONE:
mbhc->current_plug = MBHC_PLUG_TYPE_HEADPHONE;
break;
case SND_JACK_HEADSET:
mbhc->current_plug = MBHC_PLUG_TYPE_HEADSET;
mbhc->jiffies_atreport = jiffies;
break;
case SND_JACK_LINEOUT:
mbhc->current_plug = MBHC_PLUG_TYPE_HIGH_HPH;
break;
default:
break;
}
is_pa_on = wcd_mbhc_read_field(mbhc, WCD_MBHC_HPH_PA_EN);
if (!is_pa_on) {
wcd_mbhc_compute_impedance(mbhc);
if ((mbhc->zl > mbhc->cfg->linein_th) &&
(mbhc->zr > mbhc->cfg->linein_th) &&
(jack_type == SND_JACK_HEADPHONE)) {
jack_type = SND_JACK_LINEOUT;
mbhc->force_linein = true;
mbhc->current_plug = MBHC_PLUG_TYPE_HIGH_HPH;
if (mbhc->hph_status) {
mbhc->hph_status &= ~(SND_JACK_HEADSET |
SND_JACK_LINEOUT);
snd_soc_jack_report(mbhc->jack, mbhc->hph_status,
WCD_MBHC_JACK_MASK);
}
}
}
/* Do not calculate impedance again for lineout
* as during playback pa is on and impedance values
* will not be correct resulting in lineout detected
* as headphone.
*/
if (is_pa_on && mbhc->force_linein) {
jack_type = SND_JACK_LINEOUT;
mbhc->current_plug = MBHC_PLUG_TYPE_HIGH_HPH;
if (mbhc->hph_status) {
mbhc->hph_status &= ~(SND_JACK_HEADSET |
SND_JACK_LINEOUT);
snd_soc_jack_report(mbhc->jack, mbhc->hph_status,
WCD_MBHC_JACK_MASK);
}
}
mbhc->hph_status |= jack_type;
if (jack_type == SND_JACK_HEADPHONE && mbhc->mbhc_cb->mbhc_micb_ramp_control)
mbhc->mbhc_cb->mbhc_micb_ramp_control(mbhc->component, false);
snd_soc_jack_report(mbhc->jack, (mbhc->hph_status | SND_JACK_MECHANICAL),
WCD_MBHC_JACK_MASK);
}
static void wcd_mbhc_report_plug(struct wcd_mbhc *mbhc, int insertion,
enum snd_jack_types jack_type)
{
WARN_ON(!mutex_is_locked(&mbhc->lock));
if (!insertion) /* Report removal */
wcd_mbhc_report_plug_removal(mbhc, jack_type);
else
wcd_mbhc_report_plug_insertion(mbhc, jack_type);
}
static void wcd_cancel_hs_detect_plug(struct wcd_mbhc *mbhc,
struct work_struct *work)
{
mbhc->hs_detect_work_stop = true;
mutex_unlock(&mbhc->lock);
cancel_work_sync(work);
mutex_lock(&mbhc->lock);
}
static void wcd_mbhc_cancel_pending_work(struct wcd_mbhc *mbhc)
{
/* cancel pending button press */
wcd_cancel_btn_work(mbhc);
/* cancel correct work function */
wcd_cancel_hs_detect_plug(mbhc, &mbhc->correct_plug_swch);
}
static void wcd_mbhc_elec_hs_report_unplug(struct wcd_mbhc *mbhc)
{
wcd_mbhc_cancel_pending_work(mbhc);
/* Report extension cable */
wcd_mbhc_report_plug(mbhc, 1, SND_JACK_LINEOUT);
/*
* Disable HPHL trigger and MIC Schmitt triggers.
* Setup for insertion detection.
*/
disable_irq_nosync(mbhc->intr_ids->mbhc_hs_rem_intr);
wcd_mbhc_curr_micbias_control(mbhc, WCD_MBHC_EN_NONE);
/* Disable HW FSM */
wcd_mbhc_write_field(mbhc, WCD_MBHC_FSM_EN, 0);
wcd_mbhc_write_field(mbhc, WCD_MBHC_ELECT_SCHMT_ISRC, 3);
/* Set the detection type appropriately */
wcd_mbhc_write_field(mbhc, WCD_MBHC_ELECT_DETECTION_TYPE, 1);
enable_irq(mbhc->intr_ids->mbhc_hs_ins_intr);
}
static void wcd_mbhc_find_plug_and_report(struct wcd_mbhc *mbhc,
enum wcd_mbhc_plug_type plug_type)
{
if (mbhc->current_plug == plug_type)
return;
mutex_lock(&mbhc->lock);
switch (plug_type) {
case MBHC_PLUG_TYPE_HEADPHONE:
wcd_mbhc_report_plug(mbhc, 1, SND_JACK_HEADPHONE);
break;
case MBHC_PLUG_TYPE_HEADSET:
wcd_mbhc_report_plug(mbhc, 1, SND_JACK_HEADSET);
break;
case MBHC_PLUG_TYPE_HIGH_HPH:
wcd_mbhc_report_plug(mbhc, 1, SND_JACK_LINEOUT);
break;
case MBHC_PLUG_TYPE_GND_MIC_SWAP:
if (mbhc->current_plug == MBHC_PLUG_TYPE_HEADPHONE)
wcd_mbhc_report_plug(mbhc, 0, SND_JACK_HEADPHONE);
if (mbhc->current_plug == MBHC_PLUG_TYPE_HEADSET)
wcd_mbhc_report_plug(mbhc, 0, SND_JACK_HEADSET);
break;
default:
WARN(1, "Unexpected current plug_type %d, plug_type %d\n",
mbhc->current_plug, plug_type);
break;
}
mutex_unlock(&mbhc->lock);
}
static void wcd_schedule_hs_detect_plug(struct wcd_mbhc *mbhc,
struct work_struct *work)
{
WARN_ON(!mutex_is_locked(&mbhc->lock));
mbhc->hs_detect_work_stop = false;
schedule_work(work);
}
static void wcd_mbhc_adc_detect_plug_type(struct wcd_mbhc *mbhc)
{
struct snd_soc_component *component = mbhc->component;
WARN_ON(!mutex_is_locked(&mbhc->lock));
if (mbhc->mbhc_cb->hph_pull_down_ctrl)
mbhc->mbhc_cb->hph_pull_down_ctrl(component, false);
wcd_mbhc_write_field(mbhc, WCD_MBHC_DETECTION_DONE, 0);
if (mbhc->mbhc_cb->mbhc_micbias_control) {
mbhc->mbhc_cb->mbhc_micbias_control(component, MIC_BIAS_2,
MICB_ENABLE);
wcd_schedule_hs_detect_plug(mbhc, &mbhc->correct_plug_swch);
}
}
static void mbhc_plug_detect_fn(struct work_struct *work)
{
struct wcd_mbhc *mbhc = container_of(work, struct wcd_mbhc, mbhc_plug_detect_work);
struct snd_soc_component *component = mbhc->component;
enum snd_jack_types jack_type;
bool detection_type;
mutex_lock(&mbhc->lock);
mbhc->in_swch_irq_handler = true;
wcd_mbhc_cancel_pending_work(mbhc);
detection_type = wcd_mbhc_read_field(mbhc, WCD_MBHC_MECH_DETECTION_TYPE);
/* Set the detection type appropriately */
wcd_mbhc_write_field(mbhc, WCD_MBHC_MECH_DETECTION_TYPE, !detection_type);
/* Enable micbias ramp */
if (mbhc->mbhc_cb->mbhc_micb_ramp_control)
mbhc->mbhc_cb->mbhc_micb_ramp_control(component, true);
if (detection_type) {
if (mbhc->current_plug != MBHC_PLUG_TYPE_NONE)
goto exit;
/* Make sure MASTER_BIAS_CTL is enabled */
mbhc->mbhc_cb->mbhc_bias(component, true);
mbhc->is_btn_press = false;
wcd_mbhc_adc_detect_plug_type(mbhc);
} else {
/* Disable HW FSM */
wcd_mbhc_write_field(mbhc, WCD_MBHC_FSM_EN, 0);
wcd_mbhc_write_field(mbhc, WCD_MBHC_BTN_ISRC_CTL, 0);
mbhc->extn_cable_hph_rem = false;
if (mbhc->current_plug == MBHC_PLUG_TYPE_NONE)
goto exit;
mbhc->is_btn_press = false;
switch (mbhc->current_plug) {
case MBHC_PLUG_TYPE_HEADPHONE:
jack_type = SND_JACK_HEADPHONE;
break;
case MBHC_PLUG_TYPE_HEADSET:
jack_type = SND_JACK_HEADSET;
break;
case MBHC_PLUG_TYPE_HIGH_HPH:
if (mbhc->mbhc_detection_logic == WCD_DETECTION_ADC)
wcd_mbhc_write_field(mbhc, WCD_MBHC_ELECT_ISRC_EN, 0);
jack_type = SND_JACK_LINEOUT;
break;
case MBHC_PLUG_TYPE_GND_MIC_SWAP:
dev_err(mbhc->dev, "Ground and Mic Swapped on plug\n");
goto exit;
default:
dev_err(mbhc->dev, "Invalid current plug: %d\n",
mbhc->current_plug);
goto exit;
}
disable_irq_nosync(mbhc->intr_ids->mbhc_hs_rem_intr);
disable_irq_nosync(mbhc->intr_ids->mbhc_hs_ins_intr);
wcd_mbhc_write_field(mbhc, WCD_MBHC_ELECT_DETECTION_TYPE, 1);
wcd_mbhc_write_field(mbhc, WCD_MBHC_ELECT_SCHMT_ISRC, 0);
wcd_mbhc_report_plug(mbhc, 0, jack_type);
}
exit:
mbhc->in_swch_irq_handler = false;
mutex_unlock(&mbhc->lock);
}
static irqreturn_t wcd_mbhc_mech_plug_detect_irq(int irq, void *data)
{
struct wcd_mbhc *mbhc = data;
if (!mbhc->cfg->typec_analog_mux)
schedule_work(&mbhc->mbhc_plug_detect_work);
return IRQ_HANDLED;
}
int wcd_mbhc_typec_report_unplug(struct wcd_mbhc *mbhc)
{
if (!mbhc || !mbhc->cfg->typec_analog_mux)
return -EINVAL;
if (mbhc->mbhc_cb->clk_setup)
mbhc->mbhc_cb->clk_setup(mbhc->component, false);
wcd_mbhc_write_field(mbhc, WCD_MBHC_L_DET_EN, 0);
wcd_mbhc_write_field(mbhc, WCD_MBHC_MECH_DETECTION_TYPE, 0);
schedule_work(&mbhc->mbhc_plug_detect_work);
return 0;
}
EXPORT_SYMBOL_GPL(wcd_mbhc_typec_report_unplug);
int wcd_mbhc_typec_report_plug(struct wcd_mbhc *mbhc)
{
if (!mbhc || !mbhc->cfg->typec_analog_mux)
return -EINVAL;
if (mbhc->mbhc_cb->clk_setup)
mbhc->mbhc_cb->clk_setup(mbhc->component, true);
wcd_mbhc_write_field(mbhc, WCD_MBHC_L_DET_EN, 1);
schedule_work(&mbhc->mbhc_plug_detect_work);
return 0;
}
EXPORT_SYMBOL_GPL(wcd_mbhc_typec_report_plug);
static int wcd_mbhc_get_button_mask(struct wcd_mbhc *mbhc)
{
int mask = 0;
int btn;
btn = wcd_mbhc_read_field(mbhc, WCD_MBHC_BTN_RESULT);
switch (btn) {
case 0:
mask = SND_JACK_BTN_0;
break;
case 1:
mask = SND_JACK_BTN_1;
break;
case 2:
mask = SND_JACK_BTN_2;
break;
case 3:
mask = SND_JACK_BTN_3;
break;
case 4:
mask = SND_JACK_BTN_4;
break;
case 5:
mask = SND_JACK_BTN_5;
break;
default:
break;
}
return mask;
}
static void wcd_btn_long_press_fn(struct work_struct *work)
{
struct delayed_work *dwork = to_delayed_work(work);
struct wcd_mbhc *mbhc = container_of(dwork, struct wcd_mbhc, mbhc_btn_dwork);
if (mbhc->current_plug == MBHC_PLUG_TYPE_HEADSET)
snd_soc_jack_report(mbhc->jack, mbhc->buttons_pressed,
mbhc->buttons_pressed);
}
static irqreturn_t wcd_mbhc_btn_press_handler(int irq, void *data)
{
struct wcd_mbhc *mbhc = data;
int mask;
unsigned long msec_val;
mutex_lock(&mbhc->lock);
wcd_cancel_btn_work(mbhc);
mbhc->is_btn_press = true;
msec_val = jiffies_to_msecs(jiffies - mbhc->jiffies_atreport);
/* Too short, ignore button press */
if (msec_val < MBHC_BUTTON_PRESS_THRESHOLD_MIN)
goto done;
/* If switch interrupt already kicked in, ignore button press */
if (mbhc->in_swch_irq_handler)
goto done;
/* Plug isn't headset, ignore button press */
if (mbhc->current_plug != MBHC_PLUG_TYPE_HEADSET)
goto done;
mask = wcd_mbhc_get_button_mask(mbhc);
mbhc->buttons_pressed |= mask;
if (schedule_delayed_work(&mbhc->mbhc_btn_dwork, msecs_to_jiffies(400)) == 0)
WARN(1, "Button pressed twice without release event\n");
done:
mutex_unlock(&mbhc->lock);
return IRQ_HANDLED;
}
static irqreturn_t wcd_mbhc_btn_release_handler(int irq, void *data)
{
struct wcd_mbhc *mbhc = data;
int ret;
mutex_lock(&mbhc->lock);
if (mbhc->is_btn_press)
mbhc->is_btn_press = false;
else /* fake btn press */
goto exit;
if (!(mbhc->buttons_pressed & WCD_MBHC_JACK_BUTTON_MASK))
goto exit;
ret = wcd_cancel_btn_work(mbhc);
if (ret == 0) { /* Reporting long button release event */
snd_soc_jack_report(mbhc->jack, 0, mbhc->buttons_pressed);
} else {
if (!mbhc->in_swch_irq_handler) {
/* Reporting btn press n Release */
snd_soc_jack_report(mbhc->jack, mbhc->buttons_pressed,
mbhc->buttons_pressed);
snd_soc_jack_report(mbhc->jack, 0, mbhc->buttons_pressed);
}
}
mbhc->buttons_pressed &= ~WCD_MBHC_JACK_BUTTON_MASK;
exit:
mutex_unlock(&mbhc->lock);
return IRQ_HANDLED;
}
static irqreturn_t wcd_mbhc_hph_ocp_irq(struct wcd_mbhc *mbhc, bool hphr)
{
/* TODO Find a better way to report this to Userspace */
dev_err(mbhc->dev, "MBHC Over Current on %s detected\n",
hphr ? "HPHR" : "HPHL");
wcd_mbhc_write_field(mbhc, WCD_MBHC_OCP_FSM_EN, 0);
wcd_mbhc_write_field(mbhc, WCD_MBHC_OCP_FSM_EN, 1);
return IRQ_HANDLED;
}
static irqreturn_t wcd_mbhc_hphl_ocp_irq(int irq, void *data)
{
return wcd_mbhc_hph_ocp_irq(data, false);
}
static irqreturn_t wcd_mbhc_hphr_ocp_irq(int irq, void *data)
{
return wcd_mbhc_hph_ocp_irq(data, true);
}
static int wcd_mbhc_initialise(struct wcd_mbhc *mbhc)
{
struct snd_soc_component *component = mbhc->component;
int ret;
ret = pm_runtime_get_sync(component->dev);
if (ret < 0 && ret != -EACCES) {
dev_err_ratelimited(component->dev,
"pm_runtime_get_sync failed in %s, ret %d\n",
__func__, ret);
pm_runtime_put_noidle(component->dev);
return ret;
}
mutex_lock(&mbhc->lock);
if (mbhc->cfg->typec_analog_mux)
mbhc->swap_thr = GND_MIC_USBC_SWAP_THRESHOLD;
else
mbhc->swap_thr = GND_MIC_SWAP_THRESHOLD;
/* setup HS detection */
if (mbhc->mbhc_cb->hph_pull_up_control_v2)
mbhc->mbhc_cb->hph_pull_up_control_v2(component,
mbhc->cfg->typec_analog_mux ?
HS_PULLUP_I_OFF : HS_PULLUP_I_DEFAULT);
else if (mbhc->mbhc_cb->hph_pull_up_control)
mbhc->mbhc_cb->hph_pull_up_control(component,
mbhc->cfg->typec_analog_mux ?
I_OFF : I_DEFAULT);
else
wcd_mbhc_write_field(mbhc, WCD_MBHC_HS_L_DET_PULL_UP_CTRL,
mbhc->cfg->typec_analog_mux ? 0 : 3);
wcd_mbhc_write_field(mbhc, WCD_MBHC_HPHL_PLUG_TYPE, mbhc->cfg->hphl_swh);
wcd_mbhc_write_field(mbhc, WCD_MBHC_GND_PLUG_TYPE, mbhc->cfg->gnd_swh);
wcd_mbhc_write_field(mbhc, WCD_MBHC_SW_HPH_LP_100K_TO_GND, 1);
if (mbhc->cfg->gnd_det_en && mbhc->mbhc_cb->mbhc_gnd_det_ctrl)
mbhc->mbhc_cb->mbhc_gnd_det_ctrl(component, true);
wcd_mbhc_write_field(mbhc, WCD_MBHC_HS_L_DET_PULL_UP_COMP_CTRL, 1);
/* Plug detect is triggered manually if analog goes through USBCC */
if (mbhc->cfg->typec_analog_mux)
wcd_mbhc_write_field(mbhc, WCD_MBHC_L_DET_EN, 0);
else
wcd_mbhc_write_field(mbhc, WCD_MBHC_L_DET_EN, 1);
if (mbhc->cfg->typec_analog_mux)
/* Insertion debounce set to 48ms */
wcd_mbhc_write_field(mbhc, WCD_MBHC_INSREM_DBNC, 4);
else
/* Insertion debounce set to 96ms */
wcd_mbhc_write_field(mbhc, WCD_MBHC_INSREM_DBNC, 6);
/* Button Debounce set to 16ms */
wcd_mbhc_write_field(mbhc, WCD_MBHC_BTN_DBNC, 2);
/* enable bias */
mbhc->mbhc_cb->mbhc_bias(component, true);
/* enable MBHC clock */
if (mbhc->mbhc_cb->clk_setup)
mbhc->mbhc_cb->clk_setup(component,
mbhc->cfg->typec_analog_mux ? false : true);
/* program HS_VREF value */
wcd_program_hs_vref(mbhc);
wcd_program_btn_threshold(mbhc, false);
mutex_unlock(&mbhc->lock);
pm_runtime_mark_last_busy(component->dev);
pm_runtime_put_autosuspend(component->dev);
return 0;
}
static int wcd_mbhc_get_micbias(struct wcd_mbhc *mbhc)
{
int micbias = 0;
if (mbhc->mbhc_cb->get_micbias_val) {
mbhc->mbhc_cb->get_micbias_val(mbhc->component, &micbias);
} else {
u8 vout_ctl = 0;
/* Read MBHC Micbias (Mic Bias2) voltage */
vout_ctl = wcd_mbhc_read_field(mbhc, WCD_MBHC_MICB2_VOUT);
/* Formula for getting micbias from vout
* micbias = 1.0V + VOUT_CTL * 50mV
*/
micbias = 1000 + (vout_ctl * 50);
}
return micbias;
}
static int wcd_get_voltage_from_adc(u8 val, int micbias)
{
/* Formula for calculating voltage from ADC
* Voltage = ADC_RESULT*12.5mV*V_MICBIAS/1.8
*/
return ((val * 125 * micbias)/(WCD_MBHC_ADC_MICBIAS_MV * 10));
}
static int wcd_measure_adc_continuous(struct wcd_mbhc *mbhc)
{
u8 adc_result;
int output_mv;
int retry = 3;
u8 adc_en;
/* Pre-requisites for ADC continuous measurement */
/* Read legacy electircal detection and disable */
wcd_mbhc_write_field(mbhc, WCD_MBHC_ELECT_SCHMT_ISRC, 0x00);
/* Set ADC to continuous measurement */
wcd_mbhc_write_field(mbhc, WCD_MBHC_ADC_MODE, 1);
/* Read ADC Enable bit to restore after adc measurement */
adc_en = wcd_mbhc_read_field(mbhc, WCD_MBHC_ADC_EN);
/* Disable ADC_ENABLE bit */
wcd_mbhc_write_field(mbhc, WCD_MBHC_ADC_EN, 0);
/* Disable MBHC FSM */
wcd_mbhc_write_field(mbhc, WCD_MBHC_FSM_EN, 0);
/* Set the MUX selection to IN2P */
wcd_mbhc_write_field(mbhc, WCD_MBHC_MUX_CTL, MUX_CTL_IN2P);
/* Enable MBHC FSM */
wcd_mbhc_write_field(mbhc, WCD_MBHC_FSM_EN, 1);
/* Enable ADC_ENABLE bit */
wcd_mbhc_write_field(mbhc, WCD_MBHC_ADC_EN, 1);
while (retry--) {
/* wait for 3 msec before reading ADC result */
usleep_range(3000, 3100);
adc_result = wcd_mbhc_read_field(mbhc, WCD_MBHC_ADC_RESULT);
}
/* Restore ADC Enable */
wcd_mbhc_write_field(mbhc, WCD_MBHC_ADC_EN, adc_en);
/* Get voltage from ADC result */
output_mv = wcd_get_voltage_from_adc(adc_result, wcd_mbhc_get_micbias(mbhc));
return output_mv;
}
static int wcd_measure_adc_once(struct wcd_mbhc *mbhc, int mux_ctl)
{
struct device *dev = mbhc->dev;
u8 adc_timeout = 0;
u8 adc_complete = 0;
u8 adc_result;
int retry = 6;
int ret;
int output_mv = 0;
u8 adc_en;
wcd_mbhc_write_field(mbhc, WCD_MBHC_ADC_MODE, 0);
/* Read ADC Enable bit to restore after adc measurement */
adc_en = wcd_mbhc_read_field(mbhc, WCD_MBHC_ADC_EN);
/* Trigger ADC one time measurement */
wcd_mbhc_write_field(mbhc, WCD_MBHC_ADC_EN, 0);
wcd_mbhc_write_field(mbhc, WCD_MBHC_FSM_EN, 0);
/* Set the appropriate MUX selection */
wcd_mbhc_write_field(mbhc, WCD_MBHC_MUX_CTL, mux_ctl);
wcd_mbhc_write_field(mbhc, WCD_MBHC_FSM_EN, 1);
wcd_mbhc_write_field(mbhc, WCD_MBHC_ADC_EN, 1);
while (retry--) {
/* wait for 600usec to get adc results */
usleep_range(600, 610);
/* check for ADC Timeout */
adc_timeout = wcd_mbhc_read_field(mbhc, WCD_MBHC_ADC_TIMEOUT);
if (adc_timeout)
continue;
/* Read ADC complete bit */
adc_complete = wcd_mbhc_read_field(mbhc, WCD_MBHC_ADC_COMPLETE);
if (!adc_complete)
continue;
/* Read ADC result */
adc_result = wcd_mbhc_read_field(mbhc, WCD_MBHC_ADC_RESULT);
/* Get voltage from ADC result */
output_mv = wcd_get_voltage_from_adc(adc_result,
wcd_mbhc_get_micbias(mbhc));
break;
}
/* Restore ADC Enable */
wcd_mbhc_write_field(mbhc, WCD_MBHC_ADC_EN, adc_en);
if (retry <= 0) {
dev_err(dev, "%s: adc complete: %d, adc timeout: %d\n",
__func__, adc_complete, adc_timeout);
ret = -EINVAL;
} else {
ret = output_mv;
}
return ret;
}
/* To determine if cross connection occurred */
static int wcd_check_cross_conn(struct wcd_mbhc *mbhc)
{
u8 adc_mode, elect_ctl, adc_en, fsm_en;
int hphl_adc_res, hphr_adc_res;
bool is_cross_conn = false;
/* If PA is enabled, dont check for cross-connection */
if (wcd_mbhc_read_field(mbhc, WCD_MBHC_HPH_PA_EN))
return -EINVAL;
/* Read legacy electircal detection and disable */
elect_ctl = wcd_mbhc_read_field(mbhc, WCD_MBHC_ELECT_SCHMT_ISRC);
wcd_mbhc_write_field(mbhc, WCD_MBHC_ELECT_SCHMT_ISRC, 0);
/* Read and set ADC to single measurement */
adc_mode = wcd_mbhc_read_field(mbhc, WCD_MBHC_ADC_MODE);
/* Read ADC Enable bit to restore after adc measurement */
adc_en = wcd_mbhc_read_field(mbhc, WCD_MBHC_ADC_EN);
/* Read FSM status */
fsm_en = wcd_mbhc_read_field(mbhc, WCD_MBHC_FSM_EN);
/* Get adc result for HPH L */
hphl_adc_res = wcd_measure_adc_once(mbhc, MUX_CTL_HPH_L);
if (hphl_adc_res < 0)
return hphl_adc_res;
/* Get adc result for HPH R in mV */
hphr_adc_res = wcd_measure_adc_once(mbhc, MUX_CTL_HPH_R);
if (hphr_adc_res < 0)
return hphr_adc_res;
if (hphl_adc_res > HPHL_CROSS_CONN_THRESHOLD ||
hphr_adc_res > HPHL_CROSS_CONN_THRESHOLD)
is_cross_conn = true;
wcd_mbhc_write_field(mbhc, WCD_MBHC_FSM_EN, 0);
/* Set the MUX selection to Auto */
wcd_mbhc_write_field(mbhc, WCD_MBHC_MUX_CTL, MUX_CTL_AUTO);
wcd_mbhc_write_field(mbhc, WCD_MBHC_FSM_EN, 1);
/* Restore ADC Enable */
wcd_mbhc_write_field(mbhc, WCD_MBHC_ADC_EN, adc_en);
/* Restore ADC mode */
wcd_mbhc_write_field(mbhc, WCD_MBHC_ADC_MODE, adc_mode);
/* Restore FSM state */
wcd_mbhc_write_field(mbhc, WCD_MBHC_FSM_EN, fsm_en);
/* Restore electrical detection */
wcd_mbhc_write_field(mbhc, WCD_MBHC_ELECT_SCHMT_ISRC, elect_ctl);
return is_cross_conn;
}
static int wcd_mbhc_adc_get_hs_thres(struct wcd_mbhc *mbhc)
{
int hs_threshold, micbias_mv;
micbias_mv = wcd_mbhc_get_micbias(mbhc);
if (mbhc->cfg->hs_thr) {
if (mbhc->cfg->micb_mv == micbias_mv)
hs_threshold = mbhc->cfg->hs_thr;
else
hs_threshold = (mbhc->cfg->hs_thr *
micbias_mv) / mbhc->cfg->micb_mv;
} else {
hs_threshold = ((WCD_MBHC_ADC_HS_THRESHOLD_MV *
micbias_mv) / WCD_MBHC_ADC_MICBIAS_MV);
}
return hs_threshold;
}
static int wcd_mbhc_adc_get_hph_thres(struct wcd_mbhc *mbhc)
{
int hph_threshold, micbias_mv;
micbias_mv = wcd_mbhc_get_micbias(mbhc);
if (mbhc->cfg->hph_thr) {
if (mbhc->cfg->micb_mv == micbias_mv)
hph_threshold = mbhc->cfg->hph_thr;
else
hph_threshold = (mbhc->cfg->hph_thr *
micbias_mv) / mbhc->cfg->micb_mv;
} else {
hph_threshold = ((WCD_MBHC_ADC_HPH_THRESHOLD_MV *
micbias_mv) / WCD_MBHC_ADC_MICBIAS_MV);
}
return hph_threshold;
}
static void wcd_mbhc_adc_update_fsm_source(struct wcd_mbhc *mbhc,
enum wcd_mbhc_plug_type plug_type)
{
bool micbias2 = false;
switch (plug_type) {
case MBHC_PLUG_TYPE_HEADPHONE:
wcd_mbhc_write_field(mbhc, WCD_MBHC_BTN_ISRC_CTL, 3);
break;
case MBHC_PLUG_TYPE_HEADSET:
if (mbhc->mbhc_cb->micbias_enable_status)
micbias2 = mbhc->mbhc_cb->micbias_enable_status(mbhc->component,
MIC_BIAS_2);
if (!mbhc->is_hs_recording && !micbias2)
wcd_mbhc_write_field(mbhc, WCD_MBHC_BTN_ISRC_CTL, 3);
break;
default:
wcd_mbhc_write_field(mbhc, WCD_MBHC_BTN_ISRC_CTL, 0);
break;
}
}
static void wcd_mbhc_bcs_enable(struct wcd_mbhc *mbhc, int plug_type, bool enable)
{
switch (plug_type) {
case MBHC_PLUG_TYPE_HEADSET:
case MBHC_PLUG_TYPE_HEADPHONE:
if (mbhc->mbhc_cb->bcs_enable)
mbhc->mbhc_cb->bcs_enable(mbhc->component, enable);
break;
default:
break;
}
}
static int wcd_mbhc_get_plug_from_adc(struct wcd_mbhc *mbhc, int adc_result)
{
enum wcd_mbhc_plug_type plug_type;
u32 hph_thr, hs_thr;
hs_thr = wcd_mbhc_adc_get_hs_thres(mbhc);
hph_thr = wcd_mbhc_adc_get_hph_thres(mbhc);
if (adc_result < hph_thr)
plug_type = MBHC_PLUG_TYPE_HEADPHONE;
else if (adc_result > hs_thr)
plug_type = MBHC_PLUG_TYPE_HIGH_HPH;
else
plug_type = MBHC_PLUG_TYPE_HEADSET;
return plug_type;
}
static int wcd_mbhc_get_spl_hs_thres(struct wcd_mbhc *mbhc)
{
int hs_threshold, micbias_mv;
micbias_mv = wcd_mbhc_get_micbias(mbhc);
if (mbhc->cfg->hs_thr && mbhc->cfg->micb_mv != WCD_MBHC_ADC_MICBIAS_MV) {
if (mbhc->cfg->micb_mv == micbias_mv)
hs_threshold = mbhc->cfg->hs_thr;
else
hs_threshold = (mbhc->cfg->hs_thr * micbias_mv) / mbhc->cfg->micb_mv;
} else {
hs_threshold = ((WCD_MBHC_ADC_HS_THRESHOLD_MV * micbias_mv) /
WCD_MBHC_ADC_MICBIAS_MV);
}
return hs_threshold;
}
static bool wcd_mbhc_check_for_spl_headset(struct wcd_mbhc *mbhc)
{
bool is_spl_hs = false;
int output_mv, hs_threshold, hph_threshold;
if (!mbhc->mbhc_cb->mbhc_micb_ctrl_thr_mic)
return false;
/* Bump up MIC_BIAS2 to 2.7V */
mbhc->mbhc_cb->mbhc_micb_ctrl_thr_mic(mbhc->component, MIC_BIAS_2, true);
usleep_range(10000, 10100);
output_mv = wcd_measure_adc_once(mbhc, MUX_CTL_IN2P);
hs_threshold = wcd_mbhc_get_spl_hs_thres(mbhc);
hph_threshold = wcd_mbhc_adc_get_hph_thres(mbhc);
if (!(output_mv > hs_threshold || output_mv < hph_threshold))
is_spl_hs = true;
/* Back MIC_BIAS2 to 1.8v if the type is not special headset */
if (!is_spl_hs) {
mbhc->mbhc_cb->mbhc_micb_ctrl_thr_mic(mbhc->component, MIC_BIAS_2, false);
/* Add 10ms delay for micbias to settle */
usleep_range(10000, 10100);
}
return is_spl_hs;
}
static void wcd_correct_swch_plug(struct work_struct *work)
{
struct wcd_mbhc *mbhc;
struct snd_soc_component *component;
enum wcd_mbhc_plug_type plug_type = MBHC_PLUG_TYPE_INVALID;
unsigned long timeout;
int pt_gnd_mic_swap_cnt = 0;
int output_mv, cross_conn, hs_threshold, try = 0, micbias_mv;
bool is_spl_hs = false;
bool is_pa_on;
int ret;
mbhc = container_of(work, struct wcd_mbhc, correct_plug_swch);
component = mbhc->component;
ret = pm_runtime_get_sync(component->dev);
if (ret < 0 && ret != -EACCES) {
dev_err_ratelimited(component->dev,
"pm_runtime_get_sync failed in %s, ret %d\n",
__func__, ret);
pm_runtime_put_noidle(component->dev);
return;
}
micbias_mv = wcd_mbhc_get_micbias(mbhc);
hs_threshold = wcd_mbhc_adc_get_hs_thres(mbhc);
/* Mask ADC COMPLETE interrupt */
disable_irq_nosync(mbhc->intr_ids->mbhc_hs_ins_intr);
/* Check for cross connection */
do {
cross_conn = wcd_check_cross_conn(mbhc);
try++;
} while (try < mbhc->swap_thr);
if (cross_conn > 0) {
plug_type = MBHC_PLUG_TYPE_GND_MIC_SWAP;
dev_err(mbhc->dev, "cross connection found, Plug type %d\n",
plug_type);
goto correct_plug_type;
}
/* Find plug type */
output_mv = wcd_measure_adc_continuous(mbhc);
plug_type = wcd_mbhc_get_plug_from_adc(mbhc, output_mv);
/*
* Report plug type if it is either headset or headphone
* else start the 3 sec loop
*/
switch (plug_type) {
case MBHC_PLUG_TYPE_HEADPHONE:
wcd_mbhc_find_plug_and_report(mbhc, plug_type);
break;
case MBHC_PLUG_TYPE_HEADSET:
wcd_mbhc_find_plug_and_report(mbhc, plug_type);
wcd_mbhc_write_field(mbhc, WCD_MBHC_ADC_MODE, 0);
wcd_mbhc_write_field(mbhc, WCD_MBHC_ADC_EN, 0);
wcd_mbhc_write_field(mbhc, WCD_MBHC_DETECTION_DONE, 1);
break;
default:
break;
}
correct_plug_type:
/* Disable BCS slow insertion detection */
wcd_mbhc_bcs_enable(mbhc, plug_type, false);
timeout = jiffies + msecs_to_jiffies(HS_DETECT_PLUG_TIME_MS);
while (!time_after(jiffies, timeout)) {
if (mbhc->hs_detect_work_stop) {
wcd_micbias_disable(mbhc);
goto exit;
}
msleep(180);
/*
* Use ADC single mode to minimize the chance of missing out
* btn press/release for HEADSET type during correct work.
*/
output_mv = wcd_measure_adc_once(mbhc, MUX_CTL_IN2P);
plug_type = wcd_mbhc_get_plug_from_adc(mbhc, output_mv);
is_pa_on = wcd_mbhc_read_field(mbhc, WCD_MBHC_HPH_PA_EN);
if (output_mv > hs_threshold && !is_spl_hs) {
is_spl_hs = wcd_mbhc_check_for_spl_headset(mbhc);
output_mv = wcd_measure_adc_once(mbhc, MUX_CTL_IN2P);
if (is_spl_hs) {
hs_threshold *= wcd_mbhc_get_micbias(mbhc);
hs_threshold /= micbias_mv;
}
}
if ((output_mv <= hs_threshold) && !is_pa_on) {
/* Check for cross connection*/
cross_conn = wcd_check_cross_conn(mbhc);
if (cross_conn > 0) { /* cross-connection */
pt_gnd_mic_swap_cnt++;
if (pt_gnd_mic_swap_cnt < mbhc->swap_thr)
continue;
else
plug_type = MBHC_PLUG_TYPE_GND_MIC_SWAP;
} else if (!cross_conn) { /* no cross connection */
pt_gnd_mic_swap_cnt = 0;
plug_type = wcd_mbhc_get_plug_from_adc(mbhc, output_mv);
continue;
} else /* Error if (cross_conn < 0) */
continue;
if (pt_gnd_mic_swap_cnt == mbhc->swap_thr) {
/* US_EU gpio present, flip switch */
if (mbhc->cfg->swap_gnd_mic) {
if (mbhc->cfg->swap_gnd_mic(component, true))
continue;
}
}
}
/* cable is extension cable */
if (output_mv > hs_threshold || mbhc->force_linein)
plug_type = MBHC_PLUG_TYPE_HIGH_HPH;
}
wcd_mbhc_bcs_enable(mbhc, plug_type, true);
if (plug_type == MBHC_PLUG_TYPE_HIGH_HPH) {
if (is_spl_hs)
plug_type = MBHC_PLUG_TYPE_HEADSET;
else
wcd_mbhc_write_field(mbhc, WCD_MBHC_ELECT_ISRC_EN, 1);
}
wcd_mbhc_write_field(mbhc, WCD_MBHC_ADC_MODE, 0);
wcd_mbhc_write_field(mbhc, WCD_MBHC_ADC_EN, 0);
wcd_mbhc_find_plug_and_report(mbhc, plug_type);
/*
* Set DETECTION_DONE bit for HEADSET
* so that btn press/release interrupt can be generated.
* For other plug type, clear the bit.
*/
if (plug_type == MBHC_PLUG_TYPE_HEADSET)
wcd_mbhc_write_field(mbhc, WCD_MBHC_DETECTION_DONE, 1);
else
wcd_mbhc_write_field(mbhc, WCD_MBHC_DETECTION_DONE, 0);
if (mbhc->mbhc_cb->mbhc_micbias_control)
wcd_mbhc_adc_update_fsm_source(mbhc, plug_type);
exit:
if (mbhc->mbhc_cb->mbhc_micbias_control/* && !mbhc->micbias_enable*/)
mbhc->mbhc_cb->mbhc_micbias_control(component, MIC_BIAS_2, MICB_DISABLE);
/*
* If plug type is corrected from special headset to headphone,
* clear the micbias enable flag, set micbias back to 1.8V and
* disable micbias.
*/
if (plug_type == MBHC_PLUG_TYPE_HEADPHONE) {
wcd_micbias_disable(mbhc);
/*
* Enable ADC COMPLETE interrupt for HEADPHONE.
* Btn release may happen after the correct work, ADC COMPLETE
* interrupt needs to be captured to correct plug type.
*/
enable_irq(mbhc->intr_ids->mbhc_hs_ins_intr);
}
if (mbhc->mbhc_cb->hph_pull_down_ctrl)
mbhc->mbhc_cb->hph_pull_down_ctrl(component, true);
pm_runtime_mark_last_busy(component->dev);
pm_runtime_put_autosuspend(component->dev);
}
static irqreturn_t wcd_mbhc_adc_hs_rem_irq(int irq, void *data)
{
struct wcd_mbhc *mbhc = data;
unsigned long timeout;
int adc_threshold, output_mv, retry = 0;
mutex_lock(&mbhc->lock);
timeout = jiffies + msecs_to_jiffies(WCD_FAKE_REMOVAL_MIN_PERIOD_MS);
adc_threshold = wcd_mbhc_adc_get_hs_thres(mbhc);
do {
retry++;
/*
* read output_mv every 10ms to look for
* any change in IN2_P
*/
usleep_range(10000, 10100);
output_mv = wcd_measure_adc_once(mbhc, MUX_CTL_IN2P);
/* Check for fake removal */
if ((output_mv <= adc_threshold) && retry > FAKE_REM_RETRY_ATTEMPTS)
goto exit;
} while (!time_after(jiffies, timeout));
/*
* ADC COMPLETE and ELEC_REM interrupts are both enabled for
* HEADPHONE, need to reject the ADC COMPLETE interrupt which
* follows ELEC_REM one when HEADPHONE is removed.
*/
if (mbhc->current_plug == MBHC_PLUG_TYPE_HEADPHONE)
mbhc->extn_cable_hph_rem = true;
wcd_mbhc_write_field(mbhc, WCD_MBHC_DETECTION_DONE, 0);
wcd_mbhc_write_field(mbhc, WCD_MBHC_ADC_MODE, 0);
wcd_mbhc_write_field(mbhc, WCD_MBHC_ADC_EN, 0);
wcd_mbhc_elec_hs_report_unplug(mbhc);
wcd_mbhc_write_field(mbhc, WCD_MBHC_BTN_ISRC_CTL, 0);
exit:
mutex_unlock(&mbhc->lock);
return IRQ_HANDLED;
}
static irqreturn_t wcd_mbhc_adc_hs_ins_irq(int irq, void *data)
{
struct wcd_mbhc *mbhc = data;
u8 clamp_state;
u8 clamp_retry = WCD_MBHC_FAKE_INS_RETRY;
/*
* ADC COMPLETE and ELEC_REM interrupts are both enabled for HEADPHONE,
* need to reject the ADC COMPLETE interrupt which follows ELEC_REM one
* when HEADPHONE is removed.
*/
if (mbhc->extn_cable_hph_rem == true) {
mbhc->extn_cable_hph_rem = false;
return IRQ_HANDLED;
}
do {
clamp_state = wcd_mbhc_read_field(mbhc, WCD_MBHC_IN2P_CLAMP_STATE);
if (clamp_state)
return IRQ_HANDLED;
/*
* check clamp for 120ms but at 30ms chunks to leave
* room for other interrupts to be processed
*/
usleep_range(30000, 30100);
} while (--clamp_retry);
/*
* If current plug is headphone then there is no chance to
* get ADC complete interrupt, so connected cable should be
* headset not headphone.
*/
if (mbhc->current_plug == MBHC_PLUG_TYPE_HEADPHONE) {
disable_irq_nosync(mbhc->intr_ids->mbhc_hs_ins_intr);
wcd_mbhc_write_field(mbhc, WCD_MBHC_DETECTION_DONE, 1);
wcd_mbhc_find_plug_and_report(mbhc, MBHC_PLUG_TYPE_HEADSET);
return IRQ_HANDLED;
}
return IRQ_HANDLED;
}
int wcd_mbhc_get_impedance(struct wcd_mbhc *mbhc, uint32_t *zl, uint32_t *zr)
{
*zl = mbhc->zl;
*zr = mbhc->zr;
if (*zl && *zr)
return 0;
else
return -EINVAL;
}
EXPORT_SYMBOL(wcd_mbhc_get_impedance);
void wcd_mbhc_set_hph_type(struct wcd_mbhc *mbhc, int hph_type)
{
mbhc->hph_type = hph_type;
}
EXPORT_SYMBOL(wcd_mbhc_set_hph_type);
int wcd_mbhc_get_hph_type(struct wcd_mbhc *mbhc)
{
return mbhc->hph_type;
}
EXPORT_SYMBOL(wcd_mbhc_get_hph_type);
int wcd_mbhc_start(struct wcd_mbhc *mbhc, struct wcd_mbhc_config *cfg,
struct snd_soc_jack *jack)
{
if (!mbhc || !cfg || !jack)
return -EINVAL;
mbhc->cfg = cfg;
mbhc->jack = jack;
return wcd_mbhc_initialise(mbhc);
}
EXPORT_SYMBOL(wcd_mbhc_start);
void wcd_mbhc_stop(struct wcd_mbhc *mbhc)
{
mbhc->current_plug = MBHC_PLUG_TYPE_NONE;
mbhc->hph_status = 0;
disable_irq_nosync(mbhc->intr_ids->hph_left_ocp);
disable_irq_nosync(mbhc->intr_ids->hph_right_ocp);
}
EXPORT_SYMBOL(wcd_mbhc_stop);
int wcd_dt_parse_mbhc_data(struct device *dev, struct wcd_mbhc_config *cfg)
{
struct device_node *np = dev->of_node;
int ret, i, microvolt;
if (of_property_read_bool(np, "qcom,hphl-jack-type-normally-closed"))
cfg->hphl_swh = false;
else
cfg->hphl_swh = true;
if (of_property_read_bool(np, "qcom,ground-jack-type-normally-closed"))
cfg->gnd_swh = false;
else
cfg->gnd_swh = true;
ret = of_property_read_u32(np, "qcom,mbhc-headset-vthreshold-microvolt",
µvolt);
if (ret)
dev_dbg(dev, "missing qcom,mbhc-hs-mic-max-vthreshold--microvolt in dt node\n");
else
cfg->hs_thr = microvolt/1000;
ret = of_property_read_u32(np, "qcom,mbhc-headphone-vthreshold-microvolt",
µvolt);
if (ret)
dev_dbg(dev, "missing qcom,mbhc-hs-mic-min-vthreshold-microvolt entry\n");
else
cfg->hph_thr = microvolt/1000;
ret = of_property_read_u32_array(np,
"qcom,mbhc-buttons-vthreshold-microvolt",
&cfg->btn_high[0],
WCD_MBHC_DEF_BUTTONS);
if (ret)
dev_err(dev, "missing qcom,mbhc-buttons-vthreshold-microvolt entry\n");
for (i = 0; i < WCD_MBHC_DEF_BUTTONS; i++) {
if (ret) /* default voltage */
cfg->btn_high[i] = 500000;
else
/* Micro to Milli Volts */
cfg->btn_high[i] = cfg->btn_high[i]/1000;
}
return 0;
}
EXPORT_SYMBOL(wcd_dt_parse_mbhc_data);
struct wcd_mbhc *wcd_mbhc_init(struct snd_soc_component *component,
const struct wcd_mbhc_cb *mbhc_cb,
const struct wcd_mbhc_intr *intr_ids,
const struct wcd_mbhc_field *fields,
bool impedance_det_en)
{
struct device *dev = component->dev;
struct wcd_mbhc *mbhc;
int ret;
if (!intr_ids || !fields || !mbhc_cb || !mbhc_cb->mbhc_bias || !mbhc_cb->set_btn_thr) {
dev_err(dev, "%s: Insufficient mbhc configuration\n", __func__);
return ERR_PTR(-EINVAL);
}
mbhc = kzalloc(sizeof(*mbhc), GFP_KERNEL);
if (!mbhc)
return ERR_PTR(-ENOMEM);
mbhc->component = component;
mbhc->dev = dev;
mbhc->intr_ids = intr_ids;
mbhc->mbhc_cb = mbhc_cb;
mbhc->fields = fields;
mbhc->mbhc_detection_logic = WCD_DETECTION_ADC;
if (mbhc_cb->compute_impedance)
mbhc->impedance_detect = impedance_det_en;
INIT_DELAYED_WORK(&mbhc->mbhc_btn_dwork, wcd_btn_long_press_fn);
mutex_init(&mbhc->lock);
INIT_WORK(&mbhc->correct_plug_swch, wcd_correct_swch_plug);
INIT_WORK(&mbhc->mbhc_plug_detect_work, mbhc_plug_detect_fn);
ret = request_threaded_irq(mbhc->intr_ids->mbhc_sw_intr, NULL,
wcd_mbhc_mech_plug_detect_irq,
IRQF_ONESHOT | IRQF_TRIGGER_RISING,
"mbhc sw intr", mbhc);
if (ret)
goto err_free_mbhc;
ret = request_threaded_irq(mbhc->intr_ids->mbhc_btn_press_intr, NULL,
wcd_mbhc_btn_press_handler,
IRQF_ONESHOT | IRQF_TRIGGER_RISING,
"Button Press detect", mbhc);
if (ret)
goto err_free_sw_intr;
ret = request_threaded_irq(mbhc->intr_ids->mbhc_btn_release_intr, NULL,
wcd_mbhc_btn_release_handler,
IRQF_ONESHOT | IRQF_TRIGGER_RISING,
"Button Release detect", mbhc);
if (ret)
goto err_free_btn_press_intr;
ret = request_threaded_irq(mbhc->intr_ids->mbhc_hs_ins_intr, NULL,
wcd_mbhc_adc_hs_ins_irq,
IRQF_ONESHOT | IRQF_TRIGGER_RISING,
"Elect Insert", mbhc);
if (ret)
goto err_free_btn_release_intr;
disable_irq_nosync(mbhc->intr_ids->mbhc_hs_ins_intr);
ret = request_threaded_irq(mbhc->intr_ids->mbhc_hs_rem_intr, NULL,
wcd_mbhc_adc_hs_rem_irq,
IRQF_ONESHOT | IRQF_TRIGGER_RISING,
"Elect Remove", mbhc);
if (ret)
goto err_free_hs_ins_intr;
disable_irq_nosync(mbhc->intr_ids->mbhc_hs_rem_intr);
ret = request_threaded_irq(mbhc->intr_ids->hph_left_ocp, NULL,
wcd_mbhc_hphl_ocp_irq,
IRQF_ONESHOT | IRQF_TRIGGER_RISING,
"HPH_L OCP detect", mbhc);
if (ret)
goto err_free_hs_rem_intr;
ret = request_threaded_irq(mbhc->intr_ids->hph_right_ocp, NULL,
wcd_mbhc_hphr_ocp_irq,
IRQF_ONESHOT | IRQF_TRIGGER_RISING,
"HPH_R OCP detect", mbhc);
if (ret)
goto err_free_hph_left_ocp;
return mbhc;
err_free_hph_left_ocp:
free_irq(mbhc->intr_ids->hph_left_ocp, mbhc);
err_free_hs_rem_intr:
free_irq(mbhc->intr_ids->mbhc_hs_rem_intr, mbhc);
err_free_hs_ins_intr:
free_irq(mbhc->intr_ids->mbhc_hs_ins_intr, mbhc);
err_free_btn_release_intr:
free_irq(mbhc->intr_ids->mbhc_btn_release_intr, mbhc);
err_free_btn_press_intr:
free_irq(mbhc->intr_ids->mbhc_btn_press_intr, mbhc);
err_free_sw_intr:
free_irq(mbhc->intr_ids->mbhc_sw_intr, mbhc);
err_free_mbhc:
kfree(mbhc);
dev_err(dev, "Failed to request mbhc interrupts %d\n", ret);
return ERR_PTR(ret);
}
EXPORT_SYMBOL(wcd_mbhc_init);
void wcd_mbhc_deinit(struct wcd_mbhc *mbhc)
{
free_irq(mbhc->intr_ids->hph_right_ocp, mbhc);
free_irq(mbhc->intr_ids->hph_left_ocp, mbhc);
free_irq(mbhc->intr_ids->mbhc_hs_rem_intr, mbhc);
free_irq(mbhc->intr_ids->mbhc_hs_ins_intr, mbhc);
free_irq(mbhc->intr_ids->mbhc_btn_release_intr, mbhc);
free_irq(mbhc->intr_ids->mbhc_btn_press_intr, mbhc);
free_irq(mbhc->intr_ids->mbhc_sw_intr, mbhc);
mutex_lock(&mbhc->lock);
wcd_cancel_hs_detect_plug(mbhc, &mbhc->correct_plug_swch);
cancel_work_sync(&mbhc->mbhc_plug_detect_work);
mutex_unlock(&mbhc->lock);
kfree(mbhc);
}
EXPORT_SYMBOL(wcd_mbhc_deinit);
static int __init mbhc_init(void)
{
return 0;
}
static void __exit mbhc_exit(void)
{
}
module_init(mbhc_init);
module_exit(mbhc_exit);
MODULE_DESCRIPTION("wcd MBHC v2 module");
MODULE_LICENSE("GPL");
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