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2024-09-20 cf4ce59b3b70238352c7f1729f0f7223214828ad 
 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>
....@@ -65,6 +51,18 @@
6551 	{ .reg = 0x07, .def = 0x000a },
6652 	{ .reg = 0x08, .def = 0x0000 },
6753 	{ .reg = 0x09, .def = 0x0000 }
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+};
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+
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+/*
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+ * ssm2602 register patch
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+ * Workaround for playback distortions after power up: activates digital
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+ * core, and then powers on output, DAC, and whole chip at the same time
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+ */
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+
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+static const struct reg_sequence ssm2602_patch[] = {
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+	{ SSM2602_ACTIVE, 0x01 },
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+	{ SSM2602_PWR,    0x07 },
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+	{ SSM2602_RESET,  0x00 },
6866 };
6967 
7068 
....@@ -111,7 +109,6 @@
111109 
112110 SOC_SINGLE("Mic Boost (+20dB)", SSM2602_APANA, 0, 1, 0),
113111 SOC_SINGLE("Mic Boost2 (+20dB)", SSM2602_APANA, 8, 1, 0),
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-SOC_SINGLE("Mic Switch", SSM2602_APANA, 1, 1, 1),
115112 };
116113 
117114 /* Output Mixer */
....@@ -121,9 +118,30 @@
121118 SOC_DAPM_SINGLE("Mic Sidetone Switch", SSM2602_APANA, 5, 1, 0),
122119 };
123120 
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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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+
124124 /* Input mux */
125125 static const struct snd_kcontrol_new ssm2602_input_mux_controls =
126126 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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+}
127145 
128146 static const struct snd_soc_dapm_widget ssm260x_dapm_widgets[] = {
129147 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", SSM2602_PWR, 3, 1),
....@@ -145,6 +163,9 @@
145163 
146164 SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, &ssm2602_input_mux_controls),
147165 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),
148169 
149170 SND_SOC_DAPM_OUTPUT("LHPOUT"),
150171 SND_SOC_DAPM_OUTPUT("RHPOUT"),
....@@ -178,8 +199,10 @@
178199 	{"LHPOUT", NULL, "Output Mixer"},
179200 
180201 	{"Input Mux", "Line", "Line Input"},
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-	{"Input Mux", "Mic", "Mic Bias"},
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+	{"Input Mux", "Mic", "Mic Switch"},
182203 	{"ADC", NULL, "Input Mux"},
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+
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+	{"Mic Switch", NULL, "Mic Bias"},
183206 
184207 	{"Mic Bias", NULL, "MICIN"},
185208 };
....@@ -327,7 +350,7 @@
327350 	return 0;
328351 }
329352 
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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)
331354 {
332355 	struct ssm2602_priv *ssm2602 = snd_soc_component_get_drvdata(dai->component);
333356 
....@@ -494,9 +517,10 @@
494517 static const struct snd_soc_dai_ops ssm2602_dai_ops = {
495518 	.startup	= ssm2602_startup,
496519 	.hw_params	= ssm2602_hw_params,
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-	.digital_mute	= ssm2602_mute,
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+	.mute_stream	= ssm2602_mute,
498521 	.set_sysclk	= ssm2602_set_dai_sysclk,
499522 	.set_fmt	= ssm2602_set_dai_fmt,
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+	.no_capture_mute = 1,
500524 };
501525 
502526 static struct snd_soc_dai_driver ssm2602_dai = {
....@@ -577,6 +601,9 @@
577601 		return ret;
578602 	}
579603 
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+	regmap_register_patch(ssm2602->regmap, ssm2602_patch,
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+			      ARRAY_SIZE(ssm2602_patch));
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+
580607 	/* set the update bits */
581608 	regmap_update_bits(ssm2602->regmap, SSM2602_LINVOL,
582609 			    LINVOL_LRIN_BOTH, LINVOL_LRIN_BOTH);