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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c 
 kernel/sound/soc/codecs/ssm2602.c
....@@ -1,31 +1,17 @@
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-/*
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- * File:         sound/soc/codecs/ssm2602.c
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- * Author:       Cliff Cai <Cliff.Cai@analog.com>
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- *
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- * Created:      Tue June 06 2008
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- * Description:  Driver for ssm2602 sound chip
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- *
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- * Modified:
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- *               Copyright 2008 Analog Devices Inc.
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- *
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- * Bugs:         Enter bugs at http://blackfin.uclinux.org/
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License as published by
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- * the Free Software Foundation; either version 2 of the License, or
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- * (at your option) any later version.
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- *
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- * This program is distributed in the hope that it will be useful,
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- * but WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- * GNU General Public License for more details.
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- *
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- * You should have received a copy of the GNU General Public License
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- * along with this program; if not, see the file COPYING, or write
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- * to the Free Software Foundation, Inc.,
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- * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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- */
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+// SPDX-License-Identifier: GPL-2.0-or-later
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+//
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+// File:         sound/soc/codecs/ssm2602.c
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+// Author:       Cliff Cai <Cliff.Cai@analog.com>
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+//
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+// Created:      Tue June 06 2008
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+// Description:  Driver for ssm2602 sound chip
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+//
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+// Modified:
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+//               Copyright 2008 Analog Devices Inc.
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+//
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+// Bugs:         Enter bugs at http://blackfin.uclinux.org/
2813 
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+#include <linux/delay.h>
2915 #include <linux/module.h>
3016 #include <linux/regmap.h>
3117 #include <linux/slab.h>
....@@ -111,7 +97,6 @@
11197 
11298 SOC_SINGLE("Mic Boost (+20dB)", SSM2602_APANA, 0, 1, 0),
11399 SOC_SINGLE("Mic Boost2 (+20dB)", SSM2602_APANA, 8, 1, 0),
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-SOC_SINGLE("Mic Switch", SSM2602_APANA, 1, 1, 1),
115100 };
116101 
117102 /* Output Mixer */
....@@ -121,9 +106,30 @@
121106 SOC_DAPM_SINGLE("Mic Sidetone Switch", SSM2602_APANA, 5, 1, 0),
122107 };
123108 
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+static const struct snd_kcontrol_new mic_ctl =
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+	SOC_DAPM_SINGLE("Switch", SSM2602_APANA, 1, 1, 1);
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+
124112 /* Input mux */
125113 static const struct snd_kcontrol_new ssm2602_input_mux_controls =
126114 SOC_DAPM_ENUM("Input Select", ssm2602_enum[0]);
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+
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+static int ssm2602_mic_switch_event(struct snd_soc_dapm_widget *w,
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+				struct snd_kcontrol *kcontrol, int event)
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+{
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+	/*
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+	 * According to the ssm2603 data sheet (control register sequencing),
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+	 * the digital core should be activated only after all necessary bits
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+	 * in the power register are enabled, and a delay determined by the
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+	 * decoupling capacitor on the VMID pin has passed. If the digital core
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+	 * is activated too early, or even before the ADC is powered up, audible
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+	 * artifacts appear at the beginning and end of the recorded signal.
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+	 *
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+	 * In practice, audible artifacts disappear well over 500 ms.
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+	 */
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+	msleep(500);
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+
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+	return 0;
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+}
127133 
128134 static const struct snd_soc_dapm_widget ssm260x_dapm_widgets[] = {
129135 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", SSM2602_PWR, 3, 1),
....@@ -145,6 +151,9 @@
145151 
146152 SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, &ssm2602_input_mux_controls),
147153 SND_SOC_DAPM_MICBIAS("Mic Bias", SSM2602_PWR, 1, 1),
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+
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+SND_SOC_DAPM_SWITCH_E("Mic Switch", SSM2602_APANA, 1, 1, &mic_ctl,
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+		ssm2602_mic_switch_event, SND_SOC_DAPM_PRE_PMU),
148157 
149158 SND_SOC_DAPM_OUTPUT("LHPOUT"),
150159 SND_SOC_DAPM_OUTPUT("RHPOUT"),
....@@ -178,8 +187,10 @@
178187 	{"LHPOUT", NULL, "Output Mixer"},
179188 
180189 	{"Input Mux", "Line", "Line Input"},
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-	{"Input Mux", "Mic", "Mic Bias"},
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+	{"Input Mux", "Mic", "Mic Switch"},
182191 	{"ADC", NULL, "Input Mux"},
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+
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+	{"Mic Switch", NULL, "Mic Bias"},
183194 
184195 	{"Mic Bias", NULL, "MICIN"},
185196 };
....@@ -327,7 +338,7 @@
327338 	return 0;
328339 }
329340 
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-static int ssm2602_mute(struct snd_soc_dai *dai, int mute)
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+static int ssm2602_mute(struct snd_soc_dai *dai, int mute, int direction)
331342 {
332343 	struct ssm2602_priv *ssm2602 = snd_soc_component_get_drvdata(dai->component);
333344 
....@@ -494,9 +505,10 @@
494505 static const struct snd_soc_dai_ops ssm2602_dai_ops = {
495506 	.startup	= ssm2602_startup,
496507 	.hw_params	= ssm2602_hw_params,
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-	.digital_mute	= ssm2602_mute,
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+	.mute_stream	= ssm2602_mute,
498509 	.set_sysclk	= ssm2602_set_dai_sysclk,
499510 	.set_fmt	= ssm2602_set_dai_fmt,
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+	.no_capture_mute = 1,
500512 };
501513 
502514 static struct snd_soc_dai_driver ssm2602_dai = {