ASoC: mediatek: mt6359: add MT6359 accdet jack driver

MT6359 audio codec supports jack detection feature, adds MT6359
accdet driver to support jack plugged detection and key detection.

Signed-off-by: Argus Lin <argus.lin@mediatek.com>
Link: https://lore.kernel.org/r/1615383186-18500-3-git-send-email-argus.lin@mediatek.com
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/Kconfig

@@ -1812,6 +1812,14 @@ config SND_SOC_MT6359
 	  Enable support for the platform which uses MT6359 as
 	  external codec device.
 
+config SND_SOC_MT6359_ACCDET
+	tristate "MediaTek MT6359 ACCDET driver"
+	depends on MTK_PMIC_WRAP
+	help
+	  ACCDET means Accessory Detection technology, MediaTek develop it
+	  for ASoC codec soc-jack detection mechanism.
+	  Select N if you don't have jack on board.
+
 config SND_SOC_MT6660
 	tristate "Mediatek MT6660 Speaker Amplifier"
 	depends on I2C

sound/soc/codecs/Makefile

@@ -136,6 +136,7 @@ snd-soc-msm8916-digital-objs := msm8916-wcd-digital.o
 snd-soc-mt6351-objs := mt6351.o
 snd-soc-mt6358-objs := mt6358.o
 snd-soc-mt6359-objs := mt6359.o
+snd-soc-mt6359-accdet-objs := mt6359-accdet.o
 snd-soc-mt6660-objs := mt6660.o
 snd-soc-nau8315-objs := nau8315.o
 snd-soc-nau8540-objs := nau8540.o
@@ -454,6 +455,7 @@ obj-$(CONFIG_SND_SOC_MSM8916_WCD_DIGITAL) +=snd-soc-msm8916-digital.o
 obj-$(CONFIG_SND_SOC_MT6351)	+= snd-soc-mt6351.o
 obj-$(CONFIG_SND_SOC_MT6358)	+= snd-soc-mt6358.o
 obj-$(CONFIG_SND_SOC_MT6359)	+= snd-soc-mt6359.o
+obj-$(CONFIG_SND_SOC_MT6359_ACCDET) += mt6359-accdet.o
 obj-$(CONFIG_SND_SOC_MT6660)	+= snd-soc-mt6660.o
 obj-$(CONFIG_SND_SOC_NAU8315)   += snd-soc-nau8315.o
 obj-$(CONFIG_SND_SOC_NAU8540)   += snd-soc-nau8540.o

sound/soc/codecs/mt6359-accdet.h

@@ -0,0 +1,128 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2021 MediaTek Inc.
+ * Author: Argus Lin <argus.lin@mediatek.com>
+ */
+
+#ifndef _ACCDET_H_
+#define _ACCDET_H_
+
+#include <linux/ctype.h>
+#include <linux/string.h>
+
+#define ACCDET_DEVNAME "accdet"
+
+#define HEADSET_MODE_1		(1)
+#define HEADSET_MODE_2		(2)
+#define HEADSET_MODE_6		(6)
+
+#define MT6359_ACCDET_NUM_BUTTONS 4
+#define MT6359_ACCDET_JACK_MASK (SND_JACK_HEADPHONE | \
+				SND_JACK_HEADSET | \
+				SND_JACK_BTN_0 | \
+				SND_JACK_BTN_1 | \
+				SND_JACK_BTN_2 | \
+				SND_JACK_BTN_3)
+#define MT6359_ACCDET_BTN_MASK (SND_JACK_BTN_0 | \
+				SND_JACK_BTN_1 | \
+				SND_JACK_BTN_2 | \
+				SND_JACK_BTN_3)
+
+enum eint_moisture_status {
+	M_PLUG_IN =		0,
+	M_WATER_IN =		1,
+	M_HP_PLUG_IN =		2,
+	M_PLUG_OUT =		3,
+	M_NO_ACT =		4,
+	M_UNKNOWN =		5,
+};
+
+enum {
+	accdet_state000 = 0,
+	accdet_state001,
+	accdet_state010,
+	accdet_state011,
+	accdet_auxadc,
+	eint_state000,
+	eint_state001,
+	eint_state010,
+	eint_state011,
+	eint_inverter_state000,
+};
+
+struct three_key_threshold {
+	unsigned int mid;
+	unsigned int up;
+	unsigned int down;
+};
+
+struct four_key_threshold {
+	unsigned int mid;
+	unsigned int voice;
+	unsigned int up;
+	unsigned int down;
+};
+
+struct pwm_deb_settings {
+	unsigned int pwm_width;
+	unsigned int pwm_thresh;
+	unsigned int fall_delay;
+	unsigned int rise_delay;
+	unsigned int debounce0;
+	unsigned int debounce1;
+	unsigned int debounce3;
+	unsigned int debounce4;
+	unsigned int eint_pwm_width;
+	unsigned int eint_pwm_thresh;
+	unsigned int eint_debounce0;
+	unsigned int eint_debounce1;
+	unsigned int eint_debounce2;
+	unsigned int eint_debounce3;
+	unsigned int eint_inverter_debounce;
+
+};
+
+struct dts_data {
+	unsigned int mic_vol;
+	unsigned int mic_mode;
+	unsigned int plugout_deb;
+	unsigned int eint_pol;
+	struct pwm_deb_settings *pwm_deb;
+	struct three_key_threshold three_key;
+	struct four_key_threshold four_key;
+	unsigned int moisture_detect_enable;
+	unsigned int eint_detect_mode;
+	unsigned int eint_use_ext_res;
+	unsigned int eint_comp_vth;
+	unsigned int moisture_detect_mode;
+	unsigned int moisture_comp_vth;
+	unsigned int moisture_comp_vref2;
+	unsigned int moisture_use_ext_res;
+};
+
+struct mt6359_accdet {
+	struct snd_soc_jack *jack;
+	struct device *dev;
+	struct regmap *regmap;
+	struct dts_data *data;
+	unsigned int caps;
+	int accdet_irq;
+	int accdet_eint0;
+	int accdet_eint1;
+	struct mutex res_lock; /* lock protection */
+	bool jack_plugged;
+	unsigned int jack_type;
+	unsigned int btn_type;
+	unsigned int accdet_status;
+	unsigned int pre_accdet_status;
+	unsigned int cali_voltage;
+	unsigned int jd_sts;
+	struct work_struct accdet_work;
+	struct workqueue_struct *accdet_workqueue;
+	struct work_struct jd_work;
+	struct workqueue_struct *jd_workqueue;
+};
+
+int mt6359_accdet_enable_jack_detect(struct snd_soc_component *component,
+				     struct snd_soc_jack *jack);
+#endif