| /* Copyright (c) 2017, The Linux Foundation. All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 and |
| * only version 2 as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| */ |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/slab.h> |
| #include <linux/of_gpio.h> |
| #include <linux/platform_device.h> |
| #include <linux/device.h> |
| #include <linux/printk.h> |
| #include <linux/ratelimit.h> |
| #include <linux/list.h> |
| #include <linux/bitops.h> |
| #include <linux/delay.h> |
| #include <linux/pm_runtime.h> |
| #include <linux/kernel.h> |
| #include <linux/input.h> |
| #include <linux/firmware.h> |
| #include <linux/completion.h> |
| #include <sound/soc.h> |
| #include <sound/jack.h> |
| #include "wcd-mbhc-adc.h" |
| #include "wcd-mbhc-v2.h" |
| |
| #define WCD_MBHC_ADC_HS_THRESHOLD_MV 1700 |
| #define WCD_MBHC_ADC_HPH_THRESHOLD_MV 75 |
| #define WCD_MBHC_ADC_MICBIAS_MV 1800 |
| |
| static int wcd_mbhc_get_micbias(struct wcd_mbhc *mbhc) |
| { |
| int micbias = 0; |
| u8 vout_ctl = 0; |
| |
| /* Read MBHC Micbias (Mic Bias2) voltage */ |
| WCD_MBHC_REG_READ(WCD_MBHC_MICB2_VOUT, vout_ctl); |
| |
| /* Formula for getting micbias from vout |
| * micbias = 1.0V + VOUT_CTL * 50mV |
| */ |
| micbias = 1000 + (vout_ctl * 50); |
| pr_debug("%s: vout_ctl: %d, micbias: %d\n", |
| __func__, vout_ctl, micbias); |
| |
| 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 = 0; |
| int output_mv = 0; |
| int retry = 3; |
| u8 adc_en = 0; |
| |
| pr_debug("%s: enter\n", __func__); |
| |
| /* Pre-requisites for ADC continuous measurement */ |
| /* Read legacy electircal detection and disable */ |
| WCD_MBHC_REG_UPDATE_BITS(WCD_MBHC_ELECT_SCHMT_ISRC, 0x00); |
| /* Set ADC to continuous measurement */ |
| WCD_MBHC_REG_UPDATE_BITS(WCD_MBHC_ADC_MODE, 1); |
| /* Read ADC Enable bit to restore after adc measurement */ |
| WCD_MBHC_REG_READ(WCD_MBHC_ADC_EN, adc_en); |
| /* Disable ADC_ENABLE bit */ |
| WCD_MBHC_REG_UPDATE_BITS(WCD_MBHC_ADC_EN, 0); |
| /* Disable MBHC FSM */ |
| WCD_MBHC_REG_UPDATE_BITS(WCD_MBHC_FSM_EN, 0); |
| /* Set the MUX selection to IN2P */ |
| WCD_MBHC_REG_UPDATE_BITS(WCD_MBHC_MUX_CTL, MUX_CTL_IN2P); |
| /* Enable MBHC FSM */ |
| WCD_MBHC_REG_UPDATE_BITS(WCD_MBHC_FSM_EN, 1); |
| /* Enable ADC_ENABLE bit */ |
| WCD_MBHC_REG_UPDATE_BITS(WCD_MBHC_ADC_EN, 1); |
| |
| while (retry--) { |
| /* wait for 3 msec before reading ADC result */ |
| usleep_range(3000, 3100); |
| |
| /* Read ADC result */ |
| WCD_MBHC_REG_READ(WCD_MBHC_ADC_RESULT, adc_result); |
| } |
| |
| /* Restore ADC Enable */ |
| WCD_MBHC_REG_UPDATE_BITS(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)); |
| pr_debug("%s: adc_result: 0x%x, output_mv: %d\n", |
| __func__, adc_result, output_mv); |
| |
| return output_mv; |
| } |
| |
| static int wcd_measure_adc_once(struct wcd_mbhc *mbhc, int mux_ctl) |
| { |
| u8 adc_timeout = 0; |
| u8 adc_complete = 0; |
| u8 adc_result = 0; |
| int retry = 6; |
| int ret = 0; |
| int output_mv = 0; |
| u8 adc_en = 0; |
| |
| pr_debug("%s: enter\n", __func__); |
| |
| WCD_MBHC_REG_UPDATE_BITS(WCD_MBHC_ADC_MODE, 0); |
| /* Read ADC Enable bit to restore after adc measurement */ |
| WCD_MBHC_REG_READ(WCD_MBHC_ADC_EN, adc_en); |
| /* Trigger ADC one time measurement */ |
| WCD_MBHC_REG_UPDATE_BITS(WCD_MBHC_ADC_EN, 0); |
| WCD_MBHC_REG_UPDATE_BITS(WCD_MBHC_FSM_EN, 0); |
| /* Set the appropriate MUX selection */ |
| WCD_MBHC_REG_UPDATE_BITS(WCD_MBHC_MUX_CTL, mux_ctl); |
| WCD_MBHC_REG_UPDATE_BITS(WCD_MBHC_FSM_EN, 1); |
| WCD_MBHC_REG_UPDATE_BITS(WCD_MBHC_ADC_EN, 1); |
| |
| while (retry--) { |
| /* wait for 600usec to get adc results */ |
| usleep_range(600, 610); |
| |
| /* check for ADC Timeout */ |
| WCD_MBHC_REG_READ(WCD_MBHC_ADC_TIMEOUT, adc_timeout); |
| if (adc_timeout) |
| continue; |
| |
| /* Read ADC complete bit */ |
| WCD_MBHC_REG_READ(WCD_MBHC_ADC_COMPLETE, adc_complete); |
| if (!adc_complete) |
| continue; |
| |
| /* Read ADC result */ |
| WCD_MBHC_REG_READ(WCD_MBHC_ADC_RESULT, adc_result); |
| |
| pr_debug("%s: ADC result: 0x%x\n", __func__, 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_REG_UPDATE_BITS(WCD_MBHC_ADC_EN, adc_en); |
| |
| if (retry <= 0) { |
| pr_err("%s: adc complete: %d, adc timeout: %d\n", |
| __func__, adc_complete, adc_timeout); |
| ret = -EINVAL; |
| } else { |
| pr_debug("%s: adc complete: %d, adc timeout: %d output_mV: %d\n", |
| __func__, adc_complete, adc_timeout, output_mv); |
| ret = output_mv; |
| } |
| |
| pr_debug("%s: leave\n", __func__); |
| |
| return ret; |
| } |
| |
| static bool wcd_mbhc_adc_detect_anc_plug_type(struct wcd_mbhc *mbhc) |
| { |
| bool anc_mic_found = false; |
| u16 fsm_en = 0; |
| u8 det = 0; |
| unsigned long retry = 0; |
| int valid_plug_cnt = 0, invalid_plug_cnt = 0; |
| int ret = 0; |
| u8 elect_ctl = 0; |
| u8 adc_mode = 0; |
| u8 vref = 0; |
| int vref_mv[] = {1650, 1500, 1600, 1700}; |
| |
| if (mbhc->mbhc_cfg->anc_micbias < MIC_BIAS_1 || |
| mbhc->mbhc_cfg->anc_micbias > MIC_BIAS_4) |
| return false; |
| |
| if (!mbhc->mbhc_cb->mbhc_micbias_control) |
| return false; |
| |
| /* Disable Detection done for ADC operation */ |
| WCD_MBHC_REG_READ(WCD_MBHC_DETECTION_DONE, det); |
| WCD_MBHC_REG_UPDATE_BITS(WCD_MBHC_DETECTION_DONE, 0); |
| |
| /* Mask ADC COMPLETE interrupt */ |
| wcd_mbhc_hs_elec_irq(mbhc, WCD_MBHC_ELEC_HS_INS, false); |
| |
| WCD_MBHC_REG_READ(WCD_MBHC_FSM_EN, fsm_en); |
| mbhc->mbhc_cb->mbhc_micbias_control(mbhc->codec, |
| mbhc->mbhc_cfg->anc_micbias, |
| MICB_ENABLE); |
| |
| /* Read legacy electircal detection and disable */ |
| WCD_MBHC_REG_READ(WCD_MBHC_ELECT_SCHMT_ISRC, elect_ctl); |
| WCD_MBHC_REG_UPDATE_BITS(WCD_MBHC_ELECT_SCHMT_ISRC, 0x00); |
| |
| WCD_MBHC_REG_UPDATE_BITS(WCD_MBHC_ANC_DET_EN, 1); |
| WCD_MBHC_REG_READ(WCD_MBHC_ADC_MODE, adc_mode); |
| |
| /* |
| * wait for button debounce time 20ms. If 4-pole plug is inserted |
| * into 5-pole jack, then there will be a button press interrupt |
| * during anc plug detection. In that case though Hs_comp_res is 0, |
| * it should not be declared as ANC plug type |
| */ |
| usleep_range(20000, 20100); |
| |
| /* |
| * After enabling FSM, to handle slow insertion scenarios, |
| * check IN3 voltage is below the Vref |
| */ |
| WCD_MBHC_REG_READ(WCD_MBHC_HS_VREF, vref); |
| |
| do { |
| if (wcd_swch_level_remove(mbhc)) { |
| pr_debug("%s: Switch level is low\n", __func__); |
| goto done; |
| } |
| pr_debug("%s: Retry attempt %lu\n", __func__, retry + 1); |
| ret = wcd_measure_adc_once(mbhc, MUX_CTL_IN3P); |
| /* TODO - check the logic */ |
| if (ret && (ret < vref_mv[vref])) |
| valid_plug_cnt++; |
| else |
| invalid_plug_cnt++; |
| retry++; |
| } while (retry < ANC_DETECT_RETRY_CNT); |
| |
| pr_debug("%s: valid: %d, invalid: %d\n", __func__, valid_plug_cnt, |
| invalid_plug_cnt); |
| |
| /* decision logic */ |
| if (valid_plug_cnt > invalid_plug_cnt) |
| anc_mic_found = true; |
| done: |
| /* Restore ADC mode */ |
| WCD_MBHC_REG_UPDATE_BITS(WCD_MBHC_ADC_MODE, adc_mode); |
| WCD_MBHC_REG_UPDATE_BITS(WCD_MBHC_ANC_DET_EN, 0); |
| WCD_MBHC_REG_UPDATE_BITS(WCD_MBHC_FSM_EN, 0); |
| /* Set the MUX selection to AUTO */ |
| WCD_MBHC_REG_UPDATE_BITS(WCD_MBHC_MUX_CTL, MUX_CTL_AUTO); |
| WCD_MBHC_REG_UPDATE_BITS(WCD_MBHC_FSM_EN, 1); |
| WCD_MBHC_REG_UPDATE_BITS(WCD_MBHC_FSM_EN, fsm_en); |
| /* Restore detection done */ |
| WCD_MBHC_REG_UPDATE_BITS(WCD_MBHC_DETECTION_DONE, det); |
| |
| /* Restore electrical detection */ |
| WCD_MBHC_REG_UPDATE_BITS(WCD_MBHC_ELECT_SCHMT_ISRC, elect_ctl); |
| |
| mbhc->mbhc_cb->mbhc_micbias_control(mbhc->codec, |
| mbhc->mbhc_cfg->anc_micbias, |
| MICB_DISABLE); |
| pr_debug("%s: anc mic %sfound\n", __func__, |
| anc_mic_found ? "" : "not "); |
| |
| return anc_mic_found; |
| } |
| |
| /* To determine if cross connection occurred */ |
| static int wcd_check_cross_conn(struct wcd_mbhc *mbhc) |
| { |
| enum wcd_mbhc_plug_type plug_type = MBHC_PLUG_TYPE_NONE; |
| int hphl_adc_res = 0, hphr_adc_res = 0; |
| u8 fsm_en = 0; |
| int ret = 0; |
| u8 adc_mode = 0; |
| u8 elect_ctl = 0; |
| u8 adc_en = 0; |
| |
| pr_debug("%s: enter\n", __func__); |
| /* Check for button press and plug detection */ |
| if (wcd_swch_level_remove(mbhc)) { |
| pr_debug("%s: Switch level is low\n", __func__); |
| return -EINVAL; |
| } |
| |
| /* If PA is enabled, dont check for cross-connection */ |
| if (mbhc->mbhc_cb->hph_pa_on_status) |
| if (mbhc->mbhc_cb->hph_pa_on_status(mbhc->codec)) |
| return -EINVAL; |
| |
| /* Read legacy electircal detection and disable */ |
| WCD_MBHC_REG_READ(WCD_MBHC_ELECT_SCHMT_ISRC, elect_ctl); |
| WCD_MBHC_REG_UPDATE_BITS(WCD_MBHC_ELECT_SCHMT_ISRC, 0x00); |
| |
| /* Read and set ADC to single measurement */ |
| WCD_MBHC_REG_READ(WCD_MBHC_ADC_MODE, adc_mode); |
| /* Read ADC Enable bit to restore after adc measurement */ |
| WCD_MBHC_REG_READ(WCD_MBHC_ADC_EN, adc_en); |
| /* Read FSM status */ |
| WCD_MBHC_REG_READ(WCD_MBHC_FSM_EN, 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) { |
| pr_err("%s: hphl_adc_res adc measurement failed\n", __func__); |
| ret = hphl_adc_res; |
| goto done; |
| } |
| |
| /* 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) { |
| pr_err("%s: hphr_adc_res adc measurement failed\n", __func__); |
| ret = hphr_adc_res; |
| goto done; |
| } |
| |
| if (hphl_adc_res > 100 && hphr_adc_res > 100) { |
| plug_type = MBHC_PLUG_TYPE_GND_MIC_SWAP; |
| pr_debug("%s: Cross connection identified\n", __func__); |
| } else { |
| pr_debug("%s: No Cross connection found\n", __func__); |
| } |
| |
| done: |
| WCD_MBHC_REG_UPDATE_BITS(WCD_MBHC_FSM_EN, 0); |
| /* Set the MUX selection to Auto */ |
| WCD_MBHC_REG_UPDATE_BITS(WCD_MBHC_MUX_CTL, MUX_CTL_AUTO); |
| WCD_MBHC_REG_UPDATE_BITS(WCD_MBHC_FSM_EN, 1); |
| |
| /* Restore ADC Enable */ |
| WCD_MBHC_REG_UPDATE_BITS(WCD_MBHC_ADC_EN, adc_en); |
| |
| /* Restore ADC mode */ |
| WCD_MBHC_REG_UPDATE_BITS(WCD_MBHC_ADC_MODE, adc_mode); |
| |
| /* Restore FSM state */ |
| WCD_MBHC_REG_UPDATE_BITS(WCD_MBHC_FSM_EN, fsm_en); |
| |
| /* Restore electrical detection */ |
| WCD_MBHC_REG_UPDATE_BITS(WCD_MBHC_ELECT_SCHMT_ISRC, elect_ctl); |
| |
| pr_debug("%s: leave, plug type: %d\n", __func__, plug_type); |
| |
| return (plug_type == MBHC_PLUG_TYPE_GND_MIC_SWAP) ? true : false; |
| } |
| |
| static bool wcd_mbhc_adc_check_for_spl_headset(struct wcd_mbhc *mbhc, |
| int *spl_hs_cnt) |
| { |
| bool spl_hs = false; |
| int output_mv = 0; |
| int adc_threshold = 0, adc_hph_threshold = 0; |
| |
| pr_debug("%s: enter\n", __func__); |
| if (!mbhc->mbhc_cb->mbhc_micb_ctrl_thr_mic) |
| goto exit; |
| |
| /* Bump up MB2 to 2.7V */ |
| mbhc->mbhc_cb->mbhc_micb_ctrl_thr_mic(mbhc->codec, |
| mbhc->mbhc_cfg->mbhc_micbias, true); |
| usleep_range(10000, 10100); |
| |
| /* |
| * Use ADC single mode to minimize the chance of missing out |
| * btn press/relesae for HEADSET type during correct work. |
| */ |
| output_mv = wcd_measure_adc_once(mbhc, MUX_CTL_IN2P); |
| adc_threshold = ((WCD_MBHC_ADC_HS_THRESHOLD_MV * |
| wcd_mbhc_get_micbias(mbhc))/WCD_MBHC_ADC_MICBIAS_MV); |
| adc_hph_threshold = ((WCD_MBHC_ADC_HPH_THRESHOLD_MV * |
| wcd_mbhc_get_micbias(mbhc))/ |
| WCD_MBHC_ADC_MICBIAS_MV); |
| |
| if (output_mv > adc_threshold || output_mv < adc_hph_threshold) { |
| spl_hs = false; |
| } else { |
| spl_hs = true; |
| if (spl_hs_cnt) |
| *spl_hs_cnt += 1; |
| } |
| |
| /* MB2 back to 1.8v if the type is not special headset */ |
| if (spl_hs_cnt && (*spl_hs_cnt != WCD_MBHC_SPL_HS_CNT)) { |
| mbhc->mbhc_cb->mbhc_micb_ctrl_thr_mic(mbhc->codec, |
| mbhc->mbhc_cfg->mbhc_micbias, false); |
| /* Add 10ms delay for micbias to settle */ |
| usleep_range(10000, 10100); |
| } |
| |
| if (spl_hs) |
| pr_debug("%s: Detected special HS (%d)\n", __func__, spl_hs); |
| |
| exit: |
| pr_debug("%s: leave\n", __func__); |
| return spl_hs; |
| } |
| |
| static bool wcd_is_special_headset(struct wcd_mbhc *mbhc) |
| { |
| int delay = 0; |
| bool ret = false; |
| bool is_spl_hs = false; |
| int output_mv = 0; |
| int adc_threshold = 0; |
| |
| /* |
| * Increase micbias to 2.7V to detect headsets with |
| * threshold on microphone |
| */ |
| if (mbhc->mbhc_cb->mbhc_micbias_control && |
| !mbhc->mbhc_cb->mbhc_micb_ctrl_thr_mic) { |
| pr_debug("%s: callback fn micb_ctrl_thr_mic not defined\n", |
| __func__); |
| return false; |
| } else if (mbhc->mbhc_cb->mbhc_micb_ctrl_thr_mic) { |
| ret = mbhc->mbhc_cb->mbhc_micb_ctrl_thr_mic(mbhc->codec, |
| MIC_BIAS_2, true); |
| if (ret) { |
| pr_err("%s: mbhc_micb_ctrl_thr_mic failed, ret: %d\n", |
| __func__, ret); |
| return false; |
| } |
| } |
| |
| adc_threshold = ((WCD_MBHC_ADC_HS_THRESHOLD_MV * |
| wcd_mbhc_get_micbias(mbhc)) / |
| WCD_MBHC_ADC_MICBIAS_MV); |
| |
| while (!is_spl_hs) { |
| if (mbhc->hs_detect_work_stop) { |
| pr_debug("%s: stop requested: %d\n", __func__, |
| mbhc->hs_detect_work_stop); |
| break; |
| } |
| delay += 50; |
| /* Wait for 50ms for FSM to update result */ |
| msleep(50); |
| output_mv = wcd_measure_adc_once(mbhc, MUX_CTL_IN2P); |
| if (output_mv <= adc_threshold) { |
| pr_debug("%s: Special headset detected in %d msecs\n", |
| __func__, delay); |
| is_spl_hs = true; |
| } |
| |
| if (delay == SPECIAL_HS_DETECT_TIME_MS) { |
| pr_debug("%s: Spl headset not found in 2 sec\n", |
| __func__); |
| break; |
| } |
| } |
| if (is_spl_hs) { |
| pr_debug("%s: Headset with threshold found\n", __func__); |
| mbhc->micbias_enable = true; |
| ret = true; |
| } |
| if (mbhc->mbhc_cb->mbhc_micb_ctrl_thr_mic && |
| !mbhc->micbias_enable) |
| mbhc->mbhc_cb->mbhc_micb_ctrl_thr_mic(mbhc->codec, MIC_BIAS_2, |
| false); |
| pr_debug("%s: leave, micb_enable: %d\n", __func__, |
| mbhc->micbias_enable); |
| |
| return ret; |
| } |
| |
| static void wcd_mbhc_adc_update_fsm_source(struct wcd_mbhc *mbhc, |
| enum wcd_mbhc_plug_type plug_type) |
| { |
| bool micbias2; |
| |
| micbias2 = mbhc->mbhc_cb->micbias_enable_status(mbhc, |
| MIC_BIAS_2); |
| switch (plug_type) { |
| case MBHC_PLUG_TYPE_HEADPHONE: |
| WCD_MBHC_REG_UPDATE_BITS(WCD_MBHC_BTN_ISRC_CTL, 3); |
| break; |
| case MBHC_PLUG_TYPE_HEADSET: |
| case MBHC_PLUG_TYPE_ANC_HEADPHONE: |
| if (!mbhc->is_hs_recording && !micbias2) |
| WCD_MBHC_REG_UPDATE_BITS(WCD_MBHC_BTN_ISRC_CTL, 3); |
| break; |
| default: |
| WCD_MBHC_REG_UPDATE_BITS(WCD_MBHC_BTN_ISRC_CTL, 0); |
| break; |
| |
| }; |
| } |
| |
| /* should be called under interrupt context that hold suspend */ |
| static void wcd_schedule_hs_detect_plug(struct wcd_mbhc *mbhc, |
| struct work_struct *work) |
| { |
| pr_debug("%s: scheduling correct_swch_plug\n", __func__); |
| WCD_MBHC_RSC_ASSERT_LOCKED(mbhc); |
| mbhc->hs_detect_work_stop = false; |
| mbhc->mbhc_cb->lock_sleep(mbhc, true); |
| schedule_work(work); |
| } |
| |
| /* called under codec_resource_lock acquisition */ |
| static void wcd_cancel_hs_detect_plug(struct wcd_mbhc *mbhc, |
| struct work_struct *work) |
| { |
| pr_debug("%s: Canceling correct_plug_swch\n", __func__); |
| mbhc->hs_detect_work_stop = true; |
| WCD_MBHC_RSC_UNLOCK(mbhc); |
| if (cancel_work_sync(work)) { |
| pr_debug("%s: correct_plug_swch is canceled\n", |
| __func__); |
| mbhc->mbhc_cb->lock_sleep(mbhc, false); |
| } |
| WCD_MBHC_RSC_LOCK(mbhc); |
| } |
| |
| /* called under codec_resource_lock acquisition */ |
| static void wcd_mbhc_adc_detect_plug_type(struct wcd_mbhc *mbhc) |
| { |
| struct snd_soc_codec *codec = mbhc->codec; |
| |
| pr_debug("%s: enter\n", __func__); |
| WCD_MBHC_RSC_ASSERT_LOCKED(mbhc); |
| |
| if (mbhc->mbhc_cb->hph_pull_down_ctrl) |
| mbhc->mbhc_cb->hph_pull_down_ctrl(codec, false); |
| |
| WCD_MBHC_REG_UPDATE_BITS(WCD_MBHC_DETECTION_DONE, 0); |
| |
| if (mbhc->mbhc_cb->mbhc_micbias_control) { |
| mbhc->mbhc_cb->mbhc_micbias_control(codec, MIC_BIAS_2, |
| MICB_ENABLE); |
| } else { |
| pr_err("%s: Mic Bias is not enabled\n", __func__); |
| return; |
| } |
| |
| /* Re-initialize button press completion object */ |
| reinit_completion(&mbhc->btn_press_compl); |
| wcd_schedule_hs_detect_plug(mbhc, &mbhc->correct_plug_swch); |
| pr_debug("%s: leave\n", __func__); |
| } |
| |
| static void wcd_micbias_disable(struct wcd_mbhc *mbhc) |
| { |
| if (mbhc->micbias_enable) { |
| mbhc->mbhc_cb->mbhc_micb_ctrl_thr_mic( |
| mbhc->codec, MIC_BIAS_2, false); |
| if (mbhc->mbhc_cb->set_micbias_value) |
| mbhc->mbhc_cb->set_micbias_value( |
| mbhc->codec); |
| mbhc->micbias_enable = false; |
| } |
| } |
| |
| static int wcd_mbhc_get_plug_from_adc(int adc_result) |
| |
| { |
| enum wcd_mbhc_plug_type plug_type = MBHC_PLUG_TYPE_INVALID; |
| |
| if (adc_result < WCD_MBHC_ADC_HPH_THRESHOLD_MV) |
| plug_type = MBHC_PLUG_TYPE_HEADPHONE; |
| else if (adc_result > WCD_MBHC_ADC_HS_THRESHOLD_MV) |
| plug_type = MBHC_PLUG_TYPE_HIGH_HPH; |
| else |
| plug_type = MBHC_PLUG_TYPE_HEADSET; |
| pr_debug("%s: plug type is %d found\n", __func__, plug_type); |
| |
| return plug_type; |
| } |
| |
| static void wcd_correct_swch_plug(struct work_struct *work) |
| { |
| struct wcd_mbhc *mbhc; |
| struct snd_soc_codec *codec; |
| enum wcd_mbhc_plug_type plug_type = MBHC_PLUG_TYPE_INVALID; |
| unsigned long timeout; |
| bool wrk_complete = false; |
| int pt_gnd_mic_swap_cnt = 0; |
| int no_gnd_mic_swap_cnt = 0; |
| bool is_pa_on = false, spl_hs = false, spl_hs_reported = false; |
| int ret = 0; |
| int spl_hs_count = 0; |
| int output_mv = 0; |
| int cross_conn; |
| int try = 0; |
| |
| pr_debug("%s: enter\n", __func__); |
| |
| mbhc = container_of(work, struct wcd_mbhc, correct_plug_swch); |
| codec = mbhc->codec; |
| |
| WCD_MBHC_RSC_LOCK(mbhc); |
| /* Mask ADC COMPLETE interrupt */ |
| wcd_mbhc_hs_elec_irq(mbhc, WCD_MBHC_ELEC_HS_INS, false); |
| WCD_MBHC_RSC_UNLOCK(mbhc); |
| |
| /* Check for cross connection */ |
| do { |
| cross_conn = wcd_check_cross_conn(mbhc); |
| try++; |
| } while (try < GND_MIC_SWAP_THRESHOLD); |
| |
| if (cross_conn > 0) { |
| plug_type = MBHC_PLUG_TYPE_GND_MIC_SWAP; |
| pr_debug("%s: cross connection found, Plug type %d\n", |
| __func__, plug_type); |
| goto correct_plug_type; |
| } |
| /* Find plug type */ |
| output_mv = wcd_measure_adc_continuous(mbhc); |
| plug_type = wcd_mbhc_get_plug_from_adc(output_mv); |
| |
| /* |
| * Report plug type if it is either headset or headphone |
| * else start the 3 sec loop |
| */ |
| if ((plug_type == MBHC_PLUG_TYPE_HEADSET || |
| plug_type == MBHC_PLUG_TYPE_HEADPHONE) && |
| (!wcd_swch_level_remove(mbhc))) { |
| WCD_MBHC_RSC_LOCK(mbhc); |
| wcd_mbhc_find_plug_and_report(mbhc, plug_type); |
| WCD_MBHC_RSC_UNLOCK(mbhc); |
| } |
| |
| /* |
| * Set DETECTION_DONE bit for HEADSET and ANC_HEADPHONE, |
| * so that btn press/release interrupt can be generated. |
| */ |
| if (mbhc->current_plug == MBHC_PLUG_TYPE_HEADSET || |
| mbhc->current_plug == MBHC_PLUG_TYPE_ANC_HEADPHONE) { |
| WCD_MBHC_REG_UPDATE_BITS(WCD_MBHC_ADC_MODE, 0); |
| WCD_MBHC_REG_UPDATE_BITS(WCD_MBHC_ADC_EN, 0); |
| WCD_MBHC_REG_UPDATE_BITS(WCD_MBHC_DETECTION_DONE, 1); |
| } |
| |
| correct_plug_type: |
| timeout = jiffies + msecs_to_jiffies(HS_DETECT_PLUG_TIME_MS); |
| while (!time_after(jiffies, timeout)) { |
| if (mbhc->hs_detect_work_stop) { |
| pr_debug("%s: stop requested: %d\n", __func__, |
| mbhc->hs_detect_work_stop); |
| wcd_micbias_disable(mbhc); |
| goto exit; |
| } |
| |
| /* allow sometime and re-check stop requested again */ |
| msleep(20); |
| if (mbhc->hs_detect_work_stop) { |
| pr_debug("%s: stop requested: %d\n", __func__, |
| 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); |
| |
| /* |
| * instead of hogging system by contineous polling, wait for |
| * sometime and re-check stop request again. |
| */ |
| plug_type = wcd_mbhc_get_plug_from_adc(output_mv); |
| |
| if ((output_mv > WCD_MBHC_ADC_HS_THRESHOLD_MV) && |
| (spl_hs_count < WCD_MBHC_SPL_HS_CNT)) { |
| spl_hs = wcd_mbhc_adc_check_for_spl_headset(mbhc, |
| &spl_hs_count); |
| |
| if (spl_hs_count == WCD_MBHC_SPL_HS_CNT) { |
| output_mv = WCD_MBHC_ADC_HS_THRESHOLD_MV; |
| spl_hs = true; |
| mbhc->micbias_enable = true; |
| } |
| } |
| |
| if (mbhc->mbhc_cb->hph_pa_on_status) |
| is_pa_on = mbhc->mbhc_cb->hph_pa_on_status(mbhc->codec); |
| |
| if ((output_mv <= WCD_MBHC_ADC_HS_THRESHOLD_MV) && |
| (!is_pa_on)) { |
| /* Check for cross connection*/ |
| ret = wcd_check_cross_conn(mbhc); |
| if (ret < 0) |
| continue; |
| else if (ret > 0) { |
| pt_gnd_mic_swap_cnt++; |
| no_gnd_mic_swap_cnt = 0; |
| if (pt_gnd_mic_swap_cnt < |
| GND_MIC_SWAP_THRESHOLD) { |
| continue; |
| } else if (pt_gnd_mic_swap_cnt > |
| GND_MIC_SWAP_THRESHOLD) { |
| /* |
| * This is due to GND/MIC switch didn't |
| * work, Report unsupported plug. |
| */ |
| pr_debug("%s: switch did not work\n", |
| __func__); |
| plug_type = MBHC_PLUG_TYPE_GND_MIC_SWAP; |
| goto report; |
| } else { |
| plug_type = MBHC_PLUG_TYPE_GND_MIC_SWAP; |
| } |
| } else { |
| no_gnd_mic_swap_cnt++; |
| pt_gnd_mic_swap_cnt = 0; |
| plug_type = wcd_mbhc_get_plug_from_adc( |
| output_mv); |
| if ((no_gnd_mic_swap_cnt < |
| GND_MIC_SWAP_THRESHOLD) && |
| (spl_hs_count != WCD_MBHC_SPL_HS_CNT)) { |
| continue; |
| } else { |
| no_gnd_mic_swap_cnt = 0; |
| } |
| } |
| if ((pt_gnd_mic_swap_cnt == GND_MIC_SWAP_THRESHOLD) && |
| (plug_type == MBHC_PLUG_TYPE_GND_MIC_SWAP)) { |
| /* |
| * if switch is toggled, check again, |
| * otherwise report unsupported plug |
| */ |
| if (mbhc->mbhc_cfg->swap_gnd_mic && |
| mbhc->mbhc_cfg->swap_gnd_mic(codec)) { |
| pr_debug("%s: US_EU gpio present,flip switch\n" |
| , __func__); |
| continue; |
| } |
| } |
| } |
| |
| if (output_mv > WCD_MBHC_ADC_HS_THRESHOLD_MV) { |
| pr_debug("%s: cable is extension cable\n", __func__); |
| plug_type = MBHC_PLUG_TYPE_HIGH_HPH; |
| wrk_complete = true; |
| } else { |
| pr_debug("%s: cable might be headset: %d\n", __func__, |
| plug_type); |
| if (plug_type != MBHC_PLUG_TYPE_GND_MIC_SWAP) { |
| plug_type = wcd_mbhc_get_plug_from_adc( |
| output_mv); |
| if (!spl_hs_reported && |
| spl_hs_count == WCD_MBHC_SPL_HS_CNT) { |
| spl_hs_reported = true; |
| WCD_MBHC_RSC_LOCK(mbhc); |
| wcd_mbhc_find_plug_and_report(mbhc, |
| plug_type); |
| WCD_MBHC_RSC_UNLOCK(mbhc); |
| continue; |
| } else if (spl_hs_reported) |
| continue; |
| /* |
| * Report headset only if not already reported |
| * and if there is not button press without |
| * release |
| */ |
| if ((mbhc->current_plug != |
| MBHC_PLUG_TYPE_HEADSET) && |
| (mbhc->current_plug != |
| MBHC_PLUG_TYPE_ANC_HEADPHONE) && |
| !wcd_swch_level_remove(mbhc)) { |
| pr_debug("%s: cable is %s headset\n", |
| __func__, |
| ((spl_hs_count == |
| WCD_MBHC_SPL_HS_CNT) ? |
| "special ":"")); |
| goto report; |
| } |
| } |
| wrk_complete = false; |
| } |
| } |
| if (!wrk_complete) { |
| /* |
| * If plug_tye is headset, we might have already reported either |
| * in detect_plug-type or in above while loop, no need to report |
| * again |
| */ |
| if ((plug_type == MBHC_PLUG_TYPE_HEADSET) || |
| (plug_type == MBHC_PLUG_TYPE_ANC_HEADPHONE)) { |
| pr_debug("%s: plug_type:0x%x already reported\n", |
| __func__, mbhc->current_plug); |
| WCD_MBHC_REG_UPDATE_BITS(WCD_MBHC_ADC_MODE, 0); |
| WCD_MBHC_REG_UPDATE_BITS(WCD_MBHC_ADC_EN, 0); |
| goto enable_supply; |
| } |
| } |
| if (plug_type == MBHC_PLUG_TYPE_HIGH_HPH) { |
| if (wcd_is_special_headset(mbhc)) { |
| pr_debug("%s: Special headset found %d\n", |
| __func__, plug_type); |
| plug_type = MBHC_PLUG_TYPE_HEADSET; |
| } else { |
| WCD_MBHC_REG_UPDATE_BITS(WCD_MBHC_ELECT_ISRC_EN, 1); |
| } |
| } |
| |
| report: |
| if (wcd_swch_level_remove(mbhc)) { |
| pr_debug("%s: Switch level is low\n", __func__); |
| goto exit; |
| } |
| |
| pr_debug("%s: Valid plug found, plug type %d wrk_cmpt %d btn_intr %d\n", |
| __func__, plug_type, wrk_complete, |
| mbhc->btn_press_intr); |
| |
| WCD_MBHC_REG_UPDATE_BITS(WCD_MBHC_ADC_MODE, 0); |
| WCD_MBHC_REG_UPDATE_BITS(WCD_MBHC_ADC_EN, 0); |
| |
| WCD_MBHC_RSC_LOCK(mbhc); |
| wcd_mbhc_find_plug_and_report(mbhc, plug_type); |
| WCD_MBHC_RSC_UNLOCK(mbhc); |
| enable_supply: |
| /* |
| * Set DETECTION_DONE bit for HEADSET and ANC_HEADPHONE, |
| * so that btn press/release interrupt can be generated. |
| * For other plug type, clear the bit. |
| */ |
| if (plug_type == MBHC_PLUG_TYPE_HEADSET || |
| plug_type == MBHC_PLUG_TYPE_ANC_HEADPHONE) |
| WCD_MBHC_REG_UPDATE_BITS(WCD_MBHC_DETECTION_DONE, 1); |
| else |
| WCD_MBHC_REG_UPDATE_BITS(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(codec, 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 && |
| mbhc->micbias_enable) { |
| if (mbhc->mbhc_cb->mbhc_micbias_control) |
| mbhc->mbhc_cb->mbhc_micbias_control( |
| codec, MIC_BIAS_2, |
| MICB_DISABLE); |
| if (mbhc->mbhc_cb->mbhc_micb_ctrl_thr_mic) |
| mbhc->mbhc_cb->mbhc_micb_ctrl_thr_mic( |
| codec, |
| MIC_BIAS_2, false); |
| if (mbhc->mbhc_cb->set_micbias_value) { |
| mbhc->mbhc_cb->set_micbias_value(codec); |
| WCD_MBHC_REG_UPDATE_BITS(WCD_MBHC_MICB_CTRL, 0); |
| } |
| mbhc->micbias_enable = false; |
| } |
| |
| if (mbhc->mbhc_cfg->detect_extn_cable && |
| ((plug_type == MBHC_PLUG_TYPE_HEADPHONE) || |
| (plug_type == MBHC_PLUG_TYPE_HEADSET)) && |
| !mbhc->hs_detect_work_stop) { |
| WCD_MBHC_RSC_LOCK(mbhc); |
| wcd_mbhc_hs_elec_irq(mbhc, WCD_MBHC_ELEC_HS_REM, true); |
| WCD_MBHC_RSC_UNLOCK(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. |
| */ |
| if (plug_type == MBHC_PLUG_TYPE_HEADPHONE) { |
| WCD_MBHC_RSC_LOCK(mbhc); |
| wcd_mbhc_hs_elec_irq(mbhc, WCD_MBHC_ELEC_HS_INS, |
| true); |
| WCD_MBHC_RSC_UNLOCK(mbhc); |
| } |
| |
| if (mbhc->mbhc_cb->hph_pull_down_ctrl) |
| mbhc->mbhc_cb->hph_pull_down_ctrl(codec, true); |
| |
| mbhc->mbhc_cb->lock_sleep(mbhc, false); |
| pr_debug("%s: leave\n", __func__); |
| } |
| |
| 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; |
| |
| pr_debug("%s: enter\n", __func__); |
| WCD_MBHC_RSC_LOCK(mbhc); |
| |
| timeout = jiffies + |
| msecs_to_jiffies(WCD_FAKE_REMOVAL_MIN_PERIOD_MS); |
| adc_threshold = ((WCD_MBHC_ADC_HS_THRESHOLD_MV * |
| wcd_mbhc_get_micbias(mbhc)) / |
| WCD_MBHC_ADC_MICBIAS_MV); |
| 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); |
| |
| pr_debug("%s: Check for fake removal: output_mv %d\n", |
| __func__, output_mv); |
| if ((output_mv <= adc_threshold) && |
| retry > FAKE_REM_RETRY_ATTEMPTS) { |
| pr_debug("%s: headset is NOT actually removed\n", |
| __func__); |
| goto exit; |
| } |
| } while (!time_after(jiffies, timeout)); |
| |
| if (wcd_swch_level_remove(mbhc)) { |
| pr_debug("%s: Switch level is low ", __func__); |
| goto exit; |
| } |
| |
| /* |
| * 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_REG_UPDATE_BITS(WCD_MBHC_DETECTION_DONE, 0); |
| WCD_MBHC_REG_UPDATE_BITS(WCD_MBHC_ADC_MODE, 0); |
| WCD_MBHC_REG_UPDATE_BITS(WCD_MBHC_ADC_EN, 0); |
| wcd_mbhc_elec_hs_report_unplug(mbhc); |
| exit: |
| WCD_MBHC_RSC_UNLOCK(mbhc); |
| pr_debug("%s: leave\n", __func__); |
| return IRQ_HANDLED; |
| } |
| |
| static irqreturn_t wcd_mbhc_adc_hs_ins_irq(int irq, void *data) |
| { |
| struct wcd_mbhc *mbhc = data; |
| |
| pr_debug("%s: enter\n", __func__); |
| |
| /* |
| * 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; |
| pr_debug("%s: leave\n", __func__); |
| return IRQ_HANDLED; |
| } |
| |
| WCD_MBHC_RSC_LOCK(mbhc); |
| /* |
| * 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) { |
| wcd_mbhc_hs_elec_irq(mbhc, WCD_MBHC_ELEC_HS_INS, false); |
| WCD_MBHC_REG_UPDATE_BITS(WCD_MBHC_DETECTION_DONE, 1); |
| wcd_mbhc_find_plug_and_report(mbhc, MBHC_PLUG_TYPE_HEADSET); |
| WCD_MBHC_RSC_UNLOCK(mbhc); |
| return IRQ_HANDLED; |
| } |
| |
| if (!mbhc->mbhc_cfg->detect_extn_cable) { |
| pr_debug("%s: Returning as Extension cable feature not enabled\n", |
| __func__); |
| WCD_MBHC_RSC_UNLOCK(mbhc); |
| return IRQ_HANDLED; |
| } |
| |
| pr_debug("%s: Disable electrical headset insertion interrupt\n", |
| __func__); |
| wcd_mbhc_hs_elec_irq(mbhc, WCD_MBHC_ELEC_HS_INS, false); |
| WCD_MBHC_REG_UPDATE_BITS(WCD_MBHC_ELECT_SCHMT_ISRC, 0); |
| WCD_MBHC_REG_UPDATE_BITS(WCD_MBHC_ELECT_ISRC_EN, 0); |
| mbhc->is_extn_cable = true; |
| mbhc->btn_press_intr = false; |
| wcd_mbhc_adc_detect_plug_type(mbhc); |
| WCD_MBHC_RSC_UNLOCK(mbhc); |
| pr_debug("%s: leave\n", __func__); |
| return IRQ_HANDLED; |
| } |
| |
| static struct wcd_mbhc_fn mbhc_fn = { |
| .wcd_mbhc_hs_ins_irq = wcd_mbhc_adc_hs_ins_irq, |
| .wcd_mbhc_hs_rem_irq = wcd_mbhc_adc_hs_rem_irq, |
| .wcd_mbhc_detect_plug_type = wcd_mbhc_adc_detect_plug_type, |
| .wcd_mbhc_detect_anc_plug_type = wcd_mbhc_adc_detect_anc_plug_type, |
| .wcd_cancel_hs_detect_plug = wcd_cancel_hs_detect_plug, |
| }; |
| |
| /* Function: wcd_mbhc_adc_init |
| * @mbhc: MBHC function pointer |
| * Description: Initialize MBHC ADC related function pointers to MBHC structure |
| */ |
| void wcd_mbhc_adc_init(struct wcd_mbhc *mbhc) |
| { |
| if (!mbhc) { |
| pr_err("%s: mbhc is NULL\n", __func__); |
| return; |
| } |
| mbhc->mbhc_fn = &mbhc_fn; |
| INIT_WORK(&mbhc->correct_plug_swch, wcd_correct_swch_plug); |
| } |
| EXPORT_SYMBOL(wcd_mbhc_adc_init); |