path: root/drivers/extcon/extcon-arizona.c

/*
 * extcon-arizona.c - Extcon driver Wolfson Arizona devices
 *
 *  Copyright (C) 2012-2014 Wolfson Microelectronics plc
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * 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/kernel.h>
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/err.h>
#include <linux/gpio/consumer.h>
#include <linux/gpio.h>
#include <linux/input.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/property.h>
#include <linux/regulator/consumer.h>
#include <linux/extcon.h>

#include <sound/soc.h>

#include <linux/mfd/arizona/core.h>
#include <linux/mfd/arizona/pdata.h>
#include <linux/mfd/arizona/registers.h>
#include <dt-bindings/mfd/arizona.h>

#define ARIZONA_MAX_MICD_RANGE 8

#define ARIZONA_MICD_CLAMP_MODE_JDL      0x4
#define ARIZONA_MICD_CLAMP_MODE_JDH      0x5
#define ARIZONA_MICD_CLAMP_MODE_JDL_GP5H 0x9
#define ARIZONA_MICD_CLAMP_MODE_JDH_GP5H 0xb

#define ARIZONA_TST_CAP_DEFAULT 0x3
#define ARIZONA_TST_CAP_CLAMP   0x1

#define ARIZONA_HPDET_MAX 10000

#define HPDET_DEBOUNCE 500
#define DEFAULT_MICD_TIMEOUT 2000

#define QUICK_HEADPHONE_MAX_OHM 3
#define MICROPHONE_MIN_OHM      1257
#define MICROPHONE_MAX_OHM      30000

#define MICD_DBTIME_TWO_READINGS 2
#define MICD_DBTIME_FOUR_READINGS 4

#define MICD_LVL_1_TO_7 (ARIZONA_MICD_LVL_1 | ARIZONA_MICD_LVL_2 | \
			 ARIZONA_MICD_LVL_3 | ARIZONA_MICD_LVL_4 | \
			 ARIZONA_MICD_LVL_5 | ARIZONA_MICD_LVL_6 | \
			 ARIZONA_MICD_LVL_7)

#define MICD_LVL_0_TO_7 (ARIZONA_MICD_LVL_0 | MICD_LVL_1_TO_7)

#define MICD_LVL_0_TO_8 (MICD_LVL_0_TO_7 | ARIZONA_MICD_LVL_8)

struct arizona_extcon_info {
	struct device *dev;
	struct arizona *arizona;
	struct mutex lock;
	struct regulator *micvdd;
	struct input_dev *input;

	u16 last_jackdet;

	int micd_mode;
	const struct arizona_micd_config *micd_modes;
	int micd_num_modes;

	const struct arizona_micd_range *micd_ranges;
	int num_micd_ranges;

	int micd_timeout;

	bool micd_reva;
	bool micd_clamp;

	struct delayed_work hpdet_work;
	struc