[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;

	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);
		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;
		}
	}

	arizona_extcon_set_mode(info, 0);

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