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

/*
 * extcon-arizona.c - Extcon driver Wolfson Arizona devices
 *
 *  Copyright (C) 2012 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.h>
#include <linux/input.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.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>

#define ARIZONA_NUM_BUTTONS 6

#define ARIZONA_ACCDET_MODE_MIC 0
#define ARIZONA_ACCDET_MODE_HPL 1
#define ARIZONA_ACCDET_MODE_HPR 2

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

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

	bool micd_reva;
	bool micd_clamp;

	struct delayed_work hpdet_work;

	bool hpdet_active;
	bool hpdet_done;

	int num_hpdet_res;
	unsigned int hpdet_res[3];

	bool mic;
	bool detecting;
	int jack_flips;

	int hpdet_ip;

	struct extcon_dev edev;
};

static const struct arizona_micd_config micd_default_modes[] = {
	{ 0,                  2 << ARIZONA_MICD_BIAS_SRC_SHIFT, 1 },
	{ ARIZONA_ACCDET_SRC, 1 << ARIZONA_MICD_BIAS_SRC_SHIFT, 0 },
};

static struct {
	u16 status;
	int report;
} arizona_lvl_to_key[ARIZONA_NUM_BUTTONS] = {
	{  0x1, BTN_0 },
	{  0x2, BTN_1 },
	{  0x4, BTN_2 },
	{  0x8, BTN_3 },
	{ 0x10, BTN_4 },
	{ 0x20, BTN_5 },
};

#define ARIZONA_CABLE_MECHANICAL 0
#define ARIZONA_CABLE_MICROPHONE 1
#define ARIZONA_CABLE_HEADPHONE  2
#define ARIZONA_CABLE_LINEOUT    3

static const char *arizona_cable[] = {
	"Mechanical",
	"Microphone",
	"Headphone",
	"Line-out",
	NULL,
};

static void arizona_extcon_set_mode(struct arizona_extcon_info *info, int mode)
{
	struct arizona *arizona = info->arizona;

	if (arizona->pdata.micd_pol_gpio > 0)
		gpio_set_value_cansleep(arizona->pdata.micd_pol_gpio,
					info->micd_modes[mode].gpio);
	regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_1,
			   ARIZONA_MICD_BIAS_SRC_MASK,
			   info->micd_modes[mode].bias);
	regmap_update_bits(arizona->regmap, ARIZONA_ACCESSORY_DETECT_MODE_1,
			   ARIZONA_ACCDET_SRC, info->