[mirror_ubuntu-bionic-kernel.git] / 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 <linux/mfd/arizona/core.h>
#include <linux/mfd/arizona/pdata.h>
#include <linux/mfd/arizona/registers.h>

#define ARIZONA_NUM_BUTTONS 6

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 mic;
	bool detecting;
	int jack_flips;

	struct extcon_dev edev;
};

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

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

static const char *arizona_cable[] = {
	"Mechanical",
	"Microphone",
	"Headphone",
	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->micd_modes[mode].src);

	info->micd_mode = mode;

	dev_dbg(arizona->dev, "Set jack polarity to %d\n", mode);
}

static void arizona_start_mic(struct arizona_extcon_info *info)
{
	struct arizona *arizona = info->arizona;
	bool change;
	int ret;

	info->detecting = true;
	info->mic = false;
	info->jack_flips = 0;

	/* Microphone detection can't use idle mode */
	pm_runtime_get(info->dev);

	ret = regulator_enable(info->micvdd);
	if (ret != 0) {
		dev_err(arizona->dev, "Failed to enable MICVDD: %d\n",
			ret);
	}

	if (info->micd_reva) {
		regmap_write(arizona->regmap, 0x80, 0x3);
		regmap_write(arizona->regmap, 0x294, 0);
		regmap_write(arizona->regmap, 0x80, 0x0);
	}

	regmap_update_bits_check(arizona->regmap, ARIZONA_MIC_DETECT_1,
				 ARIZONA_MICD_ENA, ARIZONA_MICD_ENA,
				 &change);
	if (!change) {
		regulator_disable(info->micvdd);
		pm_runtime_put_autosuspend(info->dev);
	}
}

static void arizona_stop_mic(struct arizona_extcon_info *info)
{
	struct arizona *arizona = info->arizona;
	bool change;

	regmap_update_bits_check(arizona->regmap, ARIZONA_MIC_DETECT_1,
				 ARIZONA_MICD_ENA, 0,
				 &change);

	if (info->micd_reva) {
		regmap_write(arizona->regmap, 0x80, 0x3);
		regmap_write(arizona->regmap, 0x294, 2);
		regmap_write(arizona->regmap, 0x80, 0x0);
	}

	if (change) {
		regulator_disable(info->micvdd);
		pm_runtime_mark_last_busy(info->dev);
		pm_runtime_put_autosuspend(info->dev);
	}
}

static irqreturn_t arizona_micdet(int irq, void *data)
{
	struct arizona_extcon_info *info = data;
	struct arizona *arizona = info->arizona;
	unsigned int val, lvl;
	int ret, i;

	mutex_lock(&info->lock);

	ret = regmap_read(arizona->regmap, ARIZONA_MIC_DETECT_3, &val);
	if (ret != 0) {
		dev_err(arizona->dev, "Failed to read MICDET: %d\n", ret);
		mutex_unlock(&info->lock);
		return IRQ_NONE;
	}

	dev_dbg(arizona->dev, "MICDET: %x\n", val);

	if (!(val & ARIZONA_MICD_VALID)) {
		dev_warn(arizona->dev, "Microphone detection state invalid\n");
		mutex_unlock(&info->lock);
		return IRQ_NONE;
	}

	/* Due to jack detect this should never happen */
	if (!(val & ARIZONA_MICD_STS)) {
		dev_warn(arizona->dev, "Detected open circuit\n");
		info->detecting = false;
		goto handled;
	}

	/* If we got a high impedence we should have a headset, report it. */
	if (info->detecting && (val & 0x400)) {
		ret = extcon_update_state(&info->edev,
					  1 << ARIZONA_CABLE_MICROPHONE |
					  1 << ARIZONA_CABLE_HEADPHONE,
					  1 << ARIZONA_CABLE_MICROPHONE |
					  1 << ARIZONA_CABLE_HEADPHONE);

		if (ret != 0)
			dev_err(arizona->dev, "Headset report failed: %d\n",
				ret);

		info->mic = true;
		info->detecting = false;
		goto handled;
	}

	/* If we detected a lower impedence during initial startup
	 * then we probably have the wrong polarity, flip it.  Don't
	 * do this for the lowest impedences to speed up detection of
	 * plain headphones.  If both polarities report a low
	 * impedence then give up and report headphones.
	 */
	if (info->detecting && (val & 0x3f8)) {
		info->jack_flips++;

		if (info->jack_flips >= info->micd_num_modes) {
			dev_dbg(arizona->dev, "Detected headphone\n");
			info->detecting = false;
			arizona_stop_mic(info);

			ret = extcon_set_cable_state_(&info->edev,
						      ARIZONA_CABLE_HEADPHONE,
						      true);
			if (ret != 0)
				dev_err(arizona->dev,
					"Headphone report failed: %d\n",
				ret);
		} else {
			info->micd_mode++;
			if (info->micd_mode == info->micd_num_modes)
				info->micd_mode = 0;
			arizona_extcon_set_mode(info, info->micd_mode);

			info->jack_flips++;
		}

		goto handled;
	}

	/*
	 * If we're still detecting and we detect a short then we've
	 * got a headphone.  Otherwise it's a button press.
	 */
	if (val & 0x3fc) {
		if (info->mic) {
			dev_dbg(arizona->dev, "Mic button detected\n");

			lvl = val & ARIZONA_MICD_LVL_MASK;
			lvl >>= ARIZONA_MICD_LVL_SHIFT;

			for (i = 0; i < ARIZONA_NUM_BUTTONS; i++)
				if (lvl & arizona_lvl_to_key[i].status)
					input_report_key(info->input,
							 arizona_lvl_to_key[i].report,
							 1);
			input_sync(info->input);

		} else if (info->detecting) {
			dev_dbg(arizona->dev, "Headphone detected\n");
			info->detecting = false;
			arizona_stop_mic(info);

			ret = extcon_set_cable_state_(&info->edev,
						      ARIZONA_CABLE_HEADPHONE,
						      true);
			if (ret != 0)
				dev_err(arizona->dev,
					"Headphone report failed: %d\n",
				ret);
		} else {
			dev_warn(arizona->dev, "Button with no mic: %x\n",
				 val);
		}
	} else {
		dev_dbg(arizona->dev, "Mic button released\n");
		for (i = 0; i < ARIZONA_NUM_BUTTONS; i++)
			input_report_key(info->input,
					 arizona_lvl_to_key[i].report, 0);
		input_sync(info->input);
	}

handled:
	pm_runtime_mark_last_busy(info->dev);
	mutex_unlock(&info->lock);

	return IRQ_HANDLED;
}

static irqreturn_t arizona_jackdet(int irq, void *data)
{
	struct arizona_extcon_info *info = data;
	struct arizona *arizona = info->arizona;
	unsigned int val;
	int ret, i;

	pm_runtime_get_sync(info->dev);

	mutex_lock(&info->lock);

	ret = regmap_read(arizona->regmap, ARIZONA_AOD_IRQ_RAW_STATUS, &val);
	if (ret != 0) {
		dev_err(arizona->dev, "Failed to read jackdet status: %d\n",
			ret);
		mutex_unlock(&info->lock);
		pm_runtime_put_autosuspend(info->dev);
		return IRQ_NONE;
	}

	if (val & ARIZONA_JD1_STS) {
		dev_dbg(arizona->dev, "Detected jack\n");
		ret = extcon_set_cable_state_(&info->edev,
					      ARIZONA_CABLE_MECHANICAL, true);

		if (ret != 0)
			dev_err(arizona->dev, "Mechanical report failed: %d\n",
				ret);

		arizona_start_mic(info);
	} else {
		dev_dbg(arizona->dev, "Detected jack removal\n");

		arizona_stop_mic(info);

		for (i = 0; i < ARIZONA_NUM_BUTTONS; i++)
			input_report_key(info->input,
					 arizona_lvl_to_key[i].report, 0);
		input_sync(info->input);

		ret = extcon_update_state(&info->edev, 0xffffffff, 0);
		if (ret != 0)
			dev_err(arizona->dev, "Removal report failed: %d\n",
				ret);
	}

	mutex_unlock(&info->lock);

	pm_runtime_mark_last_busy(info->dev);
	pm_runtime_put_autosuspend(info->dev);

	return IRQ_HANDLED;
}

static int arizona_extcon_probe(struct platform_device *pdev)
{
	struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
	struct arizona_pdata *pdata;
	struct arizona_extcon_info *info;
	int ret, mode, i;

	pdata = dev_get_platdata(arizona->dev);

	info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
	if (!info) {
		dev_err(&pdev->dev, "Failed to allocate memory\n");
		ret = -ENOMEM;
		goto err;
	}

	info->micvdd = devm_regulator_get(arizona->dev, "MICVDD");
	if (IS_ERR(info->micvdd)) {
		ret = PTR_ERR(info->micvdd);
		dev_err(arizona->dev, "Failed to get MICVDD: %d\n", ret);
		goto err;
	}

	mutex_init(&info->lock);
	info->arizona = arizona;
	info->dev = &pdev->dev;
	info->detecting = true;
	platform_set_drvdata(pdev, info);

	switch (arizona->type) {
	case WM5102:
		switch (arizona->rev) {
		case 0:
			info->micd_reva = true;
			break;
		default:
			break;
		}
		break;
	default:
		break;
	}

	info->edev.name = "Headset Jack";
	info->edev.supported_cable = arizona_cable;

	ret = extcon_dev_register(&info->edev, arizona->dev);
	if (ret < 0) {
		dev_err(arizona->dev, "extcon_dev_register() failed: %d\n",
			ret);
		goto err;
	}

	if (pdata->num_micd_configs) {
		info->micd_modes = pdata->micd_configs;
		info->micd_num_modes = pdata->num_micd_configs;
	} else {
		info->micd_modes = micd_default_modes;
		info->micd_num_modes = ARRAY_SIZE(micd_default_modes);
	}

	if (arizona->pdata.micd_pol_gpio > 0) {
		if (info->micd_modes[0].gpio)
			mode = GPIOF_OUT_INIT_HIGH;
		else
			mode = GPIOF_OUT_INIT_LOW;

		ret = devm_gpio_request_one(&pdev->dev,
					    arizona->pdata.micd_pol_gpio,
					    mode,
					    "MICD polarity");
		if (ret != 0) {
			dev_err(arizona->dev, "Failed to request GPIO%d: %d\n",
				arizona->pdata.micd_pol_gpio, ret);
			goto err_register;
		}
	}

	if (arizona->pdata.micd_bias_start_time)
		regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_1,
				   ARIZONA_MICD_BIAS_STARTTIME_MASK,
				   arizona->pdata.micd_bias_start_time
				   << ARIZONA_MICD_BIAS_STARTTIME_SHIFT);

	arizona_extcon_set_mode(info, 0);

	info->input = devm_input_allocate_device(&pdev->dev);
	if (!info->input) {
		dev_err(arizona->dev, "Can't allocate input dev\n");
		ret = -ENOMEM;
		goto err_register;
	}

	for (i = 0; i < ARIZONA_NUM_BUTTONS; i++)
		input_set_capability(info->input, EV_KEY,
				     arizona_lvl_to_key[i].report);
	info->input->name = "Headset";
	info->input->phys = "arizona/extcon";
	info->input->dev.parent = &pdev->dev;

	pm_runtime_enable(&pdev->dev);
	pm_runtime_idle(&pdev->dev);
	pm_runtime_get_sync(&pdev->dev);

	ret = arizona_request_irq(arizona, ARIZONA_IRQ_JD_RISE,
				  "JACKDET rise", arizona_jackdet, info);
	if (ret != 0) {
		dev_err(&pdev->dev, "Failed to get JACKDET rise IRQ: %d\n",
			ret);
		goto err_input;
	}

	ret = arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_RISE, 1);
	if (ret != 0) {
		dev_err(&pdev->dev, "Failed to set JD rise IRQ wake: %d\n",
			ret);
		goto err_rise;
	}

	ret = arizona_request_irq(arizona, ARIZONA_IRQ_JD_FALL,
				  "JACKDET fall", arizona_jackdet, info);
	if (ret != 0) {
		dev_err(&pdev->dev, "Failed to get JD fall IRQ: %d\n", ret);
		goto err_rise_wake;
	}

	ret = arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_FALL, 1);
	if (ret != 0) {
		dev_err(&pdev->dev, "Failed to set JD fall IRQ wake: %d\n",
			ret);
		goto err_fall;
	}

	ret = arizona_request_irq(arizona, ARIZONA_IRQ_MICDET,
				  "MICDET", arizona_micdet, info);
	if (ret != 0) {
		dev_err(&pdev->dev, "Failed to get MICDET IRQ: %d\n", ret);
		goto err_fall_wake;
	}

	regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_1,
			   ARIZONA_MICD_RATE_MASK,
			   8 << ARIZONA_MICD_RATE_SHIFT);

	arizona_clk32k_enable(arizona);
	regmap_update_bits(arizona->regmap, ARIZONA_JACK_DETECT_DEBOUNCE,
			   ARIZONA_JD1_DB, ARIZONA_JD1_DB);
	regmap_update_bits(arizona->regmap, ARIZONA_JACK_DETECT_ANALOGUE,
			   ARIZONA_JD1_ENA, ARIZONA_JD1_ENA);

	ret = regulator_allow_bypass(info->micvdd, true);
	if (ret != 0)
		dev_warn(arizona->dev, "Failed to set MICVDD to bypass: %d\n",
			 ret);

	pm_runtime_put(&pdev->dev);

	ret = input_register_device(info->input);
	if (ret) {
		dev_err(&pdev->dev, "Can't register input device: %d\n", ret);
		goto err_micdet;
	}

	return 0;

err_micdet:
	arizona_free_irq(arizona, ARIZONA_IRQ_MICDET, info);
err_fall_wake:
	arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_FALL, 0);
err_fall:
	arizona_free_irq(arizona, ARIZONA_IRQ_JD_FALL, info);
err_rise_wake:
	arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_RISE, 0);
err_rise:
	arizona_free_irq(arizona, ARIZONA_IRQ_JD_RISE, info);
err_input:
err_register:
	pm_runtime_disable(&pdev->dev);
	extcon_dev_unregister(&info->edev);
err:
	return ret;
}

static int arizona_extcon_remove(struct platform_device *pdev)
{
	struct arizona_extcon_info *info = platform_get_drvdata(pdev);
	struct arizona *arizona = info->arizona;

	pm_runtime_disable(&pdev->dev);

	arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_RISE, 0);
	arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_FALL, 0);
	arizona_free_irq(arizona, ARIZONA_IRQ_MICDET, info);
	arizona_free_irq(arizona, ARIZONA_IRQ_JD_RISE, info);
	arizona_free_irq(arizona, ARIZONA_IRQ_JD_FALL, info);
	regmap_update_bits(arizona->regmap, ARIZONA_JACK_DETECT_ANALOGUE,
			   ARIZONA_JD1_ENA, 0);
	arizona_clk32k_disable(arizona);
	extcon_dev_unregister(&info->edev);

	return 0;
}

static struct platform_driver arizona_extcon_driver = {
	.driver		= {
		.name	= "arizona-extcon",
		.owner	= THIS_MODULE,
	},
	.probe		= arizona_extcon_probe,
	.remove		= arizona_extcon_remove,
};

module_platform_driver(arizona_extcon_driver);

MODULE_DESCRIPTION("Arizona Extcon driver");
MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:extcon-arizona");
Commit	Line	Data
f2c32a88 MB	1	/*
	2	* extcon-arizona.c - Extcon driver Wolfson Arizona devices
	3	*
	4	* Copyright (C) 2012 Wolfson Microelectronics plc
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*/
	16
	17	#include <linux/kernel.h>
	18	#include <linux/module.h>
	19	#include <linux/i2c.h>
	20	#include <linux/slab.h>
	21	#include <linux/interrupt.h>
	22	#include <linux/err.h>
	23	#include <linux/gpio.h>
34efe4dc	24	#include <linux/input.h>
f2c32a88 MB	25	#include <linux/platform_device.h>
	26	#include <linux/pm_runtime.h>
	27	#include <linux/regulator/consumer.h>
	28	#include <linux/extcon.h>
	29
	30	#include <linux/mfd/arizona/core.h>
	31	#include <linux/mfd/arizona/pdata.h>
	32	#include <linux/mfd/arizona/registers.h>
	33
34efe4dc MB	34	#define ARIZONA_NUM_BUTTONS 6
34efe4dc MB	35
f2c32a88 MB	36	struct arizona_extcon_info {
	37	struct device *dev;
	38	struct arizona *arizona;
	39	struct mutex lock;
	40	struct regulator *micvdd;
34efe4dc	41	struct input_dev *input;
f2c32a88 MB	42
	43	int micd_mode;
	44	const struct arizona_micd_config *micd_modes;
	45	int micd_num_modes;
	46
	47	bool micd_reva;
	48
	49	bool mic;
	50	bool detecting;
	51	int jack_flips;
	52
	53	struct extcon_dev edev;
	54	};
	55
	56	static const struct arizona_micd_config micd_default_modes[] = {
	57	{ ARIZONA_ACCDET_SRC, 1 << ARIZONA_MICD_BIAS_SRC_SHIFT, 0 },
	58	{ 0, 2 << ARIZONA_MICD_BIAS_SRC_SHIFT, 1 },
	59	};
	60
34efe4dc MB	61	static struct {
	62	u16 status;
	63	int report;
	64	} arizona_lvl_to_key[ARIZONA_NUM_BUTTONS] = {
	65	{ 0x1, BTN_0 },
	66	{ 0x2, BTN_1 },
	67	{ 0x4, BTN_2 },
	68	{ 0x8, BTN_3 },
	69	{ 0x10, BTN_4 },
	70	{ 0x20, BTN_5 },
	71	};
	72
325c6423 MB	73	#define ARIZONA_CABLE_MECHANICAL 0
	74	#define ARIZONA_CABLE_MICROPHONE 1
	75	#define ARIZONA_CABLE_HEADPHONE 2
f2c32a88 MB	76
f2c32a88 MB	77	static const char *arizona_cable[] = {
325c6423 MB	78	"Mechanical",
	79	"Microphone",
	80	"Headphone",
f2c32a88 MB	81	NULL,
	82	};
	83
f2c32a88 MB	84	static void arizona_extcon_set_mode(struct arizona_extcon_info *info, int mode)
	85	{
	86	struct arizona *arizona = info->arizona;
	87
cd74f7b3 MB	88	if (arizona->pdata.micd_pol_gpio > 0)
	89	gpio_set_value_cansleep(arizona->pdata.micd_pol_gpio,
	90	info->micd_modes[mode].gpio);
f2c32a88 MB	91	regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_1,
	92	ARIZONA_MICD_BIAS_SRC_MASK,
	93	info->micd_modes[mode].bias);
	94	regmap_update_bits(arizona->regmap, ARIZONA_ACCESSORY_DETECT_MODE_1,
	95	ARIZONA_ACCDET_SRC, info->micd_modes[mode].src);
	96
	97	info->micd_mode = mode;
	98
	99	dev_dbg(arizona->dev, "Set jack polarity to %d\n", mode);
	100	}
	101
	102	static void arizona_start_mic(struct arizona_extcon_info *info)
	103	{
	104	struct arizona *arizona = info->arizona;
	105	bool change;
	106	int ret;
	107
	108	info->detecting = true;
	109	info->mic = false;
	110	info->jack_flips = 0;
	111
	112	/* Microphone detection can't use idle mode */
	113	pm_runtime_get(info->dev);
	114
	115	ret = regulator_enable(info->micvdd);
	116	if (ret != 0) {
	117	dev_err(arizona->dev, "Failed to enable MICVDD: %d\n",
	118	ret);
	119	}
	120
	121	if (info->micd_reva) {
	122	regmap_write(arizona->regmap, 0x80, 0x3);
	123	regmap_write(arizona->regmap, 0x294, 0);
	124	regmap_write(arizona->regmap, 0x80, 0x0);
	125	}
	126
	127	regmap_update_bits_check(arizona->regmap, ARIZONA_MIC_DETECT_1,
	128	ARIZONA_MICD_ENA, ARIZONA_MICD_ENA,
	129	&change);
	130	if (!change) {
	131	regulator_disable(info->micvdd);
	132	pm_runtime_put_autosuspend(info->dev);
	133	}
	134	}
	135
	136	static void arizona_stop_mic(struct arizona_extcon_info *info)
	137	{
	138	struct arizona *arizona = info->arizona;
	139	bool change;
	140
	141	regmap_update_bits_check(arizona->regmap, ARIZONA_MIC_DETECT_1,
	142	ARIZONA_MICD_ENA, 0,
	143	&change);
	144
	145	if (info->micd_reva) {
	146	regmap_write(arizona->regmap, 0x80, 0x3);
	147	regmap_write(arizona->regmap, 0x294, 2);
	148	regmap_write(arizona->regmap, 0x80, 0x0);
	149	}
	150
	151	if (change) {
	152	regulator_disable(info->micvdd);
34efe4dc	153	pm_runtime_mark_last_busy(info->dev);
f2c32a88 MB	154	pm_runtime_put_autosuspend(info->dev);
	155	}
	156	}
	157
	158	static irqreturn_t arizona_micdet(int irq, void *data)
	159	{
	160	struct arizona_extcon_info *info = data;
	161	struct arizona *arizona = info->arizona;
34efe4dc MB	162	unsigned int val, lvl;
34efe4dc MB	163	int ret, i;
f2c32a88 MB	164
	165	mutex_lock(&info->lock);
	166
	167	ret = regmap_read(arizona->regmap, ARIZONA_MIC_DETECT_3, &val);
	168	if (ret != 0) {
	169	dev_err(arizona->dev, "Failed to read MICDET: %d\n", ret);
be31cc0b	170	mutex_unlock(&info->lock);
f2c32a88 MB	171	return IRQ_NONE;
	172	}
	173
	174	dev_dbg(arizona->dev, "MICDET: %x\n", val);
	175
	176	if (!(val & ARIZONA_MICD_VALID)) {
	177	dev_warn(arizona->dev, "Microphone detection state invalid\n");
	178	mutex_unlock(&info->lock);
	179	return IRQ_NONE;
	180	}
	181
	182	/* Due to jack detect this should never happen */
	183	if (!(val & ARIZONA_MICD_STS)) {
	184	dev_warn(arizona->dev, "Detected open circuit\n");
	185	info->detecting = false;
	186	goto handled;
	187	}
	188
	189	/* If we got a high impedence we should have a headset, report it. */
	190	if (info->detecting && (val & 0x400)) {
325c6423 MB	191	ret = extcon_update_state(&info->edev,
	192	1 << ARIZONA_CABLE_MICROPHONE \|
	193	1 << ARIZONA_CABLE_HEADPHONE,
	194	1 << ARIZONA_CABLE_MICROPHONE \|
	195	1 << ARIZONA_CABLE_HEADPHONE);
f2c32a88 MB	196
	197	if (ret != 0)
	198	dev_err(arizona->dev, "Headset report failed: %d\n",
	199	ret);
	200
	201	info->mic = true;
	202	info->detecting = false;
	203	goto handled;
	204	}
	205
	206	/* If we detected a lower impedence during initial startup
	207	* then we probably have the wrong polarity, flip it. Don't
	208	* do this for the lowest impedences to speed up detection of
	209	* plain headphones. If both polarities report a low
	210	* impedence then give up and report headphones.
	211	*/
	212	if (info->detecting && (val & 0x3f8)) {
	213	info->jack_flips++;
	214
	215	if (info->jack_flips >= info->micd_num_modes) {
	216	dev_dbg(arizona->dev, "Detected headphone\n");
	217	info->detecting = false;
9ef2224d MB	218	arizona_stop_mic(info);
9ef2224d MB	219
325c6423 MB	220	ret = extcon_set_cable_state_(&info->edev,
	221	ARIZONA_CABLE_HEADPHONE,
	222	true);
f2c32a88 MB	223	if (ret != 0)
	224	dev_err(arizona->dev,
	225	"Headphone report failed: %d\n",
	226	ret);
	227	} else {
	228	info->micd_mode++;
	229	if (info->micd_mode == info->micd_num_modes)
	230	info->micd_mode = 0;
	231	arizona_extcon_set_mode(info, info->micd_mode);
	232
	233	info->jack_flips++;
	234	}
	235
	236	goto handled;
	237	}
	238
	239	/*
	240	* If we're still detecting and we detect a short then we've
34efe4dc	241	* got a headphone. Otherwise it's a button press.
f2c32a88 MB	242	*/
	243	if (val & 0x3fc) {
	244	if (info->mic) {
	245	dev_dbg(arizona->dev, "Mic button detected\n");
	246
34efe4dc MB	247	lvl = val & ARIZONA_MICD_LVL_MASK;
	248	lvl >>= ARIZONA_MICD_LVL_SHIFT;
	249
	250	for (i = 0; i < ARIZONA_NUM_BUTTONS; i++)
	251	if (lvl & arizona_lvl_to_key[i].status)
	252	input_report_key(info->input,
	253	arizona_lvl_to_key[i].report,
	254	1);
	255	input_sync(info->input);
	256
f2c32a88 MB	257	} else if (info->detecting) {
	258	dev_dbg(arizona->dev, "Headphone detected\n");
	259	info->detecting = false;
	260	arizona_stop_mic(info);
	261
325c6423 MB	262	ret = extcon_set_cable_state_(&info->edev,
	263	ARIZONA_CABLE_HEADPHONE,
	264	true);
f2c32a88 MB	265	if (ret != 0)
	266	dev_err(arizona->dev,
	267	"Headphone report failed: %d\n",
	268	ret);
	269	} else {
	270	dev_warn(arizona->dev, "Button with no mic: %x\n",
	271	val);
	272	}
	273	} else {
	274	dev_dbg(arizona->dev, "Mic button released\n");
34efe4dc MB	275	for (i = 0; i < ARIZONA_NUM_BUTTONS; i++)
	276	input_report_key(info->input,
	277	arizona_lvl_to_key[i].report, 0);
	278	input_sync(info->input);
f2c32a88 MB	279	}
	280
	281	handled:
	282	pm_runtime_mark_last_busy(info->dev);
	283	mutex_unlock(&info->lock);
	284
	285	return IRQ_HANDLED;
	286	}
	287
	288	static irqreturn_t arizona_jackdet(int irq, void *data)
	289	{
	290	struct arizona_extcon_info *info = data;
	291	struct arizona *arizona = info->arizona;
	292	unsigned int val;
34efe4dc	293	int ret, i;
f2c32a88 MB	294
	295	pm_runtime_get_sync(info->dev);
	296
	297	mutex_lock(&info->lock);
	298
	299	ret = regmap_read(arizona->regmap, ARIZONA_AOD_IRQ_RAW_STATUS, &val);
	300	if (ret != 0) {
	301	dev_err(arizona->dev, "Failed to read jackdet status: %d\n",
	302	ret);
	303	mutex_unlock(&info->lock);
	304	pm_runtime_put_autosuspend(info->dev);
	305	return IRQ_NONE;
	306	}
	307
	308	if (val & ARIZONA_JD1_STS) {
	309	dev_dbg(arizona->dev, "Detected jack\n");
325c6423 MB	310	ret = extcon_set_cable_state_(&info->edev,
325c6423 MB	311	ARIZONA_CABLE_MECHANICAL, true);
f2c32a88 MB	312
	313	if (ret != 0)
	314	dev_err(arizona->dev, "Mechanical report failed: %d\n",
	315	ret);
	316
	317	arizona_start_mic(info);
	318	} else {
	319	dev_dbg(arizona->dev, "Detected jack removal\n");
	320
	321	arizona_stop_mic(info);
	322
34efe4dc MB	323	for (i = 0; i < ARIZONA_NUM_BUTTONS; i++)
	324	input_report_key(info->input,
	325	arizona_lvl_to_key[i].report, 0);
	326	input_sync(info->input);
	327
f2c32a88 MB	328	ret = extcon_update_state(&info->edev, 0xffffffff, 0);
	329	if (ret != 0)
	330	dev_err(arizona->dev, "Removal report failed: %d\n",
	331	ret);
	332	}
	333
	334	mutex_unlock(&info->lock);
	335
	336	pm_runtime_mark_last_busy(info->dev);
	337	pm_runtime_put_autosuspend(info->dev);
	338
	339	return IRQ_HANDLED;
	340	}
	341
44f34fd4	342	static int arizona_extcon_probe(struct platform_device *pdev)
f2c32a88 MB	343	{
	344	struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
	345	struct arizona_pdata *pdata;
	346	struct arizona_extcon_info *info;
34efe4dc	347	int ret, mode, i;
f2c32a88 MB	348
	349	pdata = dev_get_platdata(arizona->dev);
	350
	351	info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
	352	if (!info) {
8e5f5018	353	dev_err(&pdev->dev, "Failed to allocate memory\n");
f2c32a88 MB	354	ret = -ENOMEM;
	355	goto err;
	356	}
	357
	358	info->micvdd = devm_regulator_get(arizona->dev, "MICVDD");
	359	if (IS_ERR(info->micvdd)) {
	360	ret = PTR_ERR(info->micvdd);
	361	dev_err(arizona->dev, "Failed to get MICVDD: %d\n", ret);
	362	goto err;
	363	}
	364
	365	mutex_init(&info->lock);
	366	info->arizona = arizona;
	367	info->dev = &pdev->dev;
	368	info->detecting = true;
	369	platform_set_drvdata(pdev, info);
	370
	371	switch (arizona->type) {
	372	case WM5102:
	373	switch (arizona->rev) {
	374	case 0:
	375	info->micd_reva = true;
	376	break;
	377	default:
	378	break;
	379	}
	380	break;
	381	default:
	382	break;
	383	}
	384
	385	info->edev.name = "Headset Jack";
	386	info->edev.supported_cable = arizona_cable;
f2c32a88 MB	387
	388	ret = extcon_dev_register(&info->edev, arizona->dev);
	389	if (ret < 0) {
8e5f5018	390	dev_err(arizona->dev, "extcon_dev_register() failed: %d\n",
f2c32a88 MB	391	ret);
	392	goto err;
	393	}
	394
	395	if (pdata->num_micd_configs) {
	396	info->micd_modes = pdata->micd_configs;
	397	info->micd_num_modes = pdata->num_micd_configs;
	398	} else {
	399	info->micd_modes = micd_default_modes;
	400	info->micd_num_modes = ARRAY_SIZE(micd_default_modes);
	401	}
	402
	403	if (arizona->pdata.micd_pol_gpio > 0) {
	404	if (info->micd_modes[0].gpio)
	405	mode = GPIOF_OUT_INIT_HIGH;
	406	else
	407	mode = GPIOF_OUT_INIT_LOW;
	408
	409	ret = devm_gpio_request_one(&pdev->dev,
	410	arizona->pdata.micd_pol_gpio,
	411	mode,
	412	"MICD polarity");
	413	if (ret != 0) {
	414	dev_err(arizona->dev, "Failed to request GPIO%d: %d\n",
	415	arizona->pdata.micd_pol_gpio, ret);
	416	goto err_register;
	417	}
	418	}
	419
b17e5462 MB	420	if (arizona->pdata.micd_bias_start_time)
	421	regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_1,
	422	ARIZONA_MICD_BIAS_STARTTIME_MASK,
	423	arizona->pdata.micd_bias_start_time
	424	<< ARIZONA_MICD_BIAS_STARTTIME_SHIFT);
	425
f2c32a88 MB	426	arizona_extcon_set_mode(info, 0);
f2c32a88 MB	427
3d44ea1c	428	info->input = devm_input_allocate_device(&pdev->dev);
34efe4dc MB	429	if (!info->input) {
	430	dev_err(arizona->dev, "Can't allocate input dev\n");
	431	ret = -ENOMEM;
	432	goto err_register;
	433	}
	434
	435	for (i = 0; i < ARIZONA_NUM_BUTTONS; i++)
	436	input_set_capability(info->input, EV_KEY,
	437	arizona_lvl_to_key[i].report);
	438	info->input->name = "Headset";
	439	info->input->phys = "arizona/extcon";
	440	info->input->dev.parent = &pdev->dev;
	441
f2c32a88 MB	442	pm_runtime_enable(&pdev->dev);
	443	pm_runtime_idle(&pdev->dev);
	444	pm_runtime_get_sync(&pdev->dev);
	445
	446	ret = arizona_request_irq(arizona, ARIZONA_IRQ_JD_RISE,
	447	"JACKDET rise", arizona_jackdet, info);
	448	if (ret != 0) {
	449	dev_err(&pdev->dev, "Failed to get JACKDET rise IRQ: %d\n",
	450	ret);
34efe4dc	451	goto err_input;
f2c32a88 MB	452	}
	453
	454	ret = arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_RISE, 1);
	455	if (ret != 0) {
	456	dev_err(&pdev->dev, "Failed to set JD rise IRQ wake: %d\n",
	457	ret);
	458	goto err_rise;
	459	}
	460
	461	ret = arizona_request_irq(arizona, ARIZONA_IRQ_JD_FALL,
	462	"JACKDET fall", arizona_jackdet, info);
	463	if (ret != 0) {
	464	dev_err(&pdev->dev, "Failed to get JD fall IRQ: %d\n", ret);
	465	goto err_rise_wake;
	466	}
	467
	468	ret = arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_FALL, 1);
	469	if (ret != 0) {
	470	dev_err(&pdev->dev, "Failed to set JD fall IRQ wake: %d\n",
	471	ret);
	472	goto err_fall;
	473	}
	474
	475	ret = arizona_request_irq(arizona, ARIZONA_IRQ_MICDET,
	476	"MICDET", arizona_micdet, info);
	477	if (ret != 0) {
	478	dev_err(&pdev->dev, "Failed to get MICDET IRQ: %d\n", ret);
	479	goto err_fall_wake;
	480	}
	481
	482	regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_1,
f2c32a88	483	ARIZONA_MICD_RATE_MASK,
f2c32a88 MB	484	8 << ARIZONA_MICD_RATE_SHIFT);
	485
	486	arizona_clk32k_enable(arizona);
	487	regmap_update_bits(arizona->regmap, ARIZONA_JACK_DETECT_DEBOUNCE,
	488	ARIZONA_JD1_DB, ARIZONA_JD1_DB);
	489	regmap_update_bits(arizona->regmap, ARIZONA_JACK_DETECT_ANALOGUE,
	490	ARIZONA_JD1_ENA, ARIZONA_JD1_ENA);
	491
b8575a11 MB	492	ret = regulator_allow_bypass(info->micvdd, true);
	493	if (ret != 0)
	494	dev_warn(arizona->dev, "Failed to set MICVDD to bypass: %d\n",
	495	ret);
	496
f2c32a88 MB	497	pm_runtime_put(&pdev->dev);
f2c32a88 MB	498
34efe4dc MB	499	ret = input_register_device(info->input);
	500	if (ret) {
	501	dev_err(&pdev->dev, "Can't register input device: %d\n", ret);
80732cc1	502	goto err_micdet;
34efe4dc MB	503	}
34efe4dc MB	504
f2c32a88 MB	505	return 0;
f2c32a88 MB	506
80732cc1 MB	507	err_micdet:
80732cc1 MB	508	arizona_free_irq(arizona, ARIZONA_IRQ_MICDET, info);
f2c32a88 MB	509	err_fall_wake:
	510	arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_FALL, 0);
	511	err_fall:
	512	arizona_free_irq(arizona, ARIZONA_IRQ_JD_FALL, info);
	513	err_rise_wake:
	514	arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_RISE, 0);
	515	err_rise:
	516	arizona_free_irq(arizona, ARIZONA_IRQ_JD_RISE, info);
34efe4dc	517	err_input:
f2c32a88 MB	518	err_register:
	519	pm_runtime_disable(&pdev->dev);
	520	extcon_dev_unregister(&info->edev);
	521	err:
	522	return ret;
	523	}
	524
93ed0327	525	static int arizona_extcon_remove(struct platform_device *pdev)
f2c32a88 MB	526	{
	527	struct arizona_extcon_info *info = platform_get_drvdata(pdev);
	528	struct arizona *arizona = info->arizona;
	529
	530	pm_runtime_disable(&pdev->dev);
	531
	532	arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_RISE, 0);
	533	arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_FALL, 0);
	534	arizona_free_irq(arizona, ARIZONA_IRQ_MICDET, info);
	535	arizona_free_irq(arizona, ARIZONA_IRQ_JD_RISE, info);
	536	arizona_free_irq(arizona, ARIZONA_IRQ_JD_FALL, info);
	537	regmap_update_bits(arizona->regmap, ARIZONA_JACK_DETECT_ANALOGUE,
	538	ARIZONA_JD1_ENA, 0);
	539	arizona_clk32k_disable(arizona);
	540	extcon_dev_unregister(&info->edev);
	541
	542	return 0;
	543	}
	544
	545	static struct platform_driver arizona_extcon_driver = {
	546	.driver = {
	547	.name = "arizona-extcon",
	548	.owner = THIS_MODULE,
	549	},
	550	.probe = arizona_extcon_probe,
5f7e2228	551	.remove = arizona_extcon_remove,
f2c32a88 MB	552	};
	553
	554	module_platform_driver(arizona_extcon_driver);
	555
	556	MODULE_DESCRIPTION("Arizona Extcon driver");
	557	MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
	558	MODULE_LICENSE("GPL");
	559	MODULE_ALIAS("platform:extcon-arizona");