Merge "ASoC: AQT1000: Add API for adjusting the micbias voltage on AQT1000" (b7da83b2) · Commits · e / devices / android_kernel_xiaomi_nabu

asoc/codecs/aqt1000/aqt1000-api.h

0 → 100644

+28 −0

Original line number	Diff line number	Diff line
		/* Copyright (c) 2018, 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.
		*/

		#ifndef AQT1000_API_H
		#define AQT1000_API_H

		#include <linux/kernel.h>
		#include <linux/module.h>
		#include <linux/of_device.h>
		#include <sound/soc.h>

		extern int aqt_mbhc_micb_adjust_voltage(struct snd_soc_codec *codec,
		int volt, int micb_num);
		extern int aqt_cdc_mclk_enable(struct snd_soc_codec *codec, bool enable);
		extern int aqt_get_micb_vout_ctl_val(u32 micb_mv);
		extern int aqt_micbias_control(struct snd_soc_codec *codec, int micb_num,
		int req, bool is_dapm);

		#endif /* AQT1000_API_H */

asoc/codecs/aqt1000/aqt1000.c

+77 −0

Original line number	Diff line number	Diff line
		@@ -35,6 +35,7 @@
		#include <sound/info.h>
		#include "aqt1000-registers.h"
		#include "aqt1000.h"
		#include "aqt1000-api.h"
		#include "aqt1000-routing.h"
		#include "../wcdcal-hwdep.h"
		#include "aqt1000-internal.h"
		@@ -46,6 +47,7 @@
		#define CF_MIN_3DB_150HZ 0x2

		#define AQT_VERSION_ENTRY_SIZE 17
		#define AQT_VOUT_CTL_TO_MICB(x) (1000 + x *50)

		static struct interp_sample_rate sr_val_tbl[] = {
		{8000, 0x0}, {16000, 0x1}, {32000, 0x3}, {48000, 0x4}, {96000, 0x5},
		@@ -682,6 +684,81 @@ static int aqt_codec_enable_rx_bias(struct snd_soc_dapm_widget *w,
		return 0;
		}

		/*
		* aqt_mbhc_micb_adjust_voltage: adjust specific micbias voltage
		* @codec: handle to snd_soc_codec *
		* @req_volt: micbias voltage to be set
		* @micb_num: micbias to be set, e.g. micbias1 or micbias2
		*
		* return 0 if adjustment is success or error code in case of failure
		*/
		int aqt_mbhc_micb_adjust_voltage(struct snd_soc_codec *codec,
		int req_volt, int micb_num)
		{
		struct aqt1000 *aqt;
		int cur_vout_ctl, req_vout_ctl;
		int micb_reg, micb_val, micb_en;
		int ret = 0;

		if (!codec) {
		pr_err("%s: Invalid codec pointer\n", __func__);
		return -EINVAL;
		}

		if (micb_num != MIC_BIAS_1)
		return -EINVAL;
		else
		micb_reg = AQT1000_ANA_MICB1;

		aqt = snd_soc_codec_get_drvdata(codec);
		mutex_lock(&aqt->micb_lock);

		/*
		* If requested micbias voltage is same as current micbias
		* voltage, then just return. Otherwise, adjust voltage as
		* per requested value. If micbias is already enabled, then
		* to avoid slow micbias ramp-up or down enable pull-up
		* momentarily, change the micbias value and then re-enable
		* micbias.
		*/
		micb_val = snd_soc_read(codec, micb_reg);
		micb_en = (micb_val & 0xC0) >> 6;
		cur_vout_ctl = micb_val & 0x3F;

		req_vout_ctl = aqt_get_micb_vout_ctl_val(req_volt);
		if (req_vout_ctl < 0) {
		ret = -EINVAL;
		goto exit;
		}
		if (cur_vout_ctl == req_vout_ctl) {
		ret = 0;
		goto exit;
		}

		dev_dbg(codec->dev, "%s: micb_num: %d, cur_mv: %d, req_mv: %d, micb_en: %d\n",
		__func__, micb_num, AQT_VOUT_CTL_TO_MICB(cur_vout_ctl),
		req_volt, micb_en);

		if (micb_en == 0x1)
		snd_soc_update_bits(codec, micb_reg, 0xC0, 0x80);

		snd_soc_update_bits(codec, micb_reg, 0x3F, req_vout_ctl);

		if (micb_en == 0x1) {
		snd_soc_update_bits(codec, micb_reg, 0xC0, 0x40);
		/*
		* Add 2ms delay as per HW requirement after enabling
		* micbias
		*/
		usleep_range(2000, 2100);
		}
		exit:
		mutex_unlock(&aqt->micb_lock);

		return ret;
		}
		EXPORT_SYMBOL(aqt_mbhc_micb_adjust_voltage);

		/*
		* aqt_micbias_control: enable/disable micbias
		* @codec: handle to snd_soc_codec *