[deliverable/linux.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/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>

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

	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 },
};

#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_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;
	int ret;

	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, the
	 * button reporting is stubbed out for now.
	 */
	if (val & 0x3fc) {
		if (info->mic) {
			dev_dbg(arizona->dev, "Mic button detected\n");

		} 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");
	}

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;

	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);

		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 __devinit 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;

	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_regster() 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);

	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_register;
	}

	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);

	pm_runtime_put(&pdev->dev);

	return 0;

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_register:
	pm_runtime_disable(&pdev->dev);
	extcon_dev_unregister(&info->edev);
err:
	return ret;
}

static int __devexit 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		= __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>
	24	#include <linux/platform_device.h>
	25	#include <linux/pm_runtime.h>
	26	#include <linux/regulator/consumer.h>
	27	#include <linux/extcon.h>
	28
	29	#include <linux/mfd/arizona/core.h>
	30	#include <linux/mfd/arizona/pdata.h>
	31	#include <linux/mfd/arizona/registers.h>
	32
	33	struct arizona_extcon_info {
	34	struct device *dev;
	35	struct arizona *arizona;
	36	struct mutex lock;
	37	struct regulator *micvdd;
	38
	39	int micd_mode;
	40	const struct arizona_micd_config *micd_modes;
	41	int micd_num_modes;
	42
	43	bool micd_reva;
	44
	45	bool mic;
	46	bool detecting;
	47	int jack_flips;
	48
	49	struct extcon_dev edev;
	50	};
	51
	52	static const struct arizona_micd_config micd_default_modes[] = {
	53	{ ARIZONA_ACCDET_SRC, 1 << ARIZONA_MICD_BIAS_SRC_SHIFT, 0 },
	54	{ 0, 2 << ARIZONA_MICD_BIAS_SRC_SHIFT, 1 },
	55	};
	56
325c6423 MB	57	#define ARIZONA_CABLE_MECHANICAL 0
	58	#define ARIZONA_CABLE_MICROPHONE 1
	59	#define ARIZONA_CABLE_HEADPHONE 2
f2c32a88 MB	60
f2c32a88 MB	61	static const char *arizona_cable[] = {
325c6423 MB	62	"Mechanical",
	63	"Microphone",
	64	"Headphone",
f2c32a88 MB	65	NULL,
	66	};
	67
f2c32a88 MB	68	static void arizona_extcon_set_mode(struct arizona_extcon_info *info, int mode)
	69	{
	70	struct arizona *arizona = info->arizona;
	71
	72	gpio_set_value_cansleep(arizona->pdata.micd_pol_gpio,
	73	info->micd_modes[mode].gpio);
	74	regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_1,
	75	ARIZONA_MICD_BIAS_SRC_MASK,
	76	info->micd_modes[mode].bias);
	77	regmap_update_bits(arizona->regmap, ARIZONA_ACCESSORY_DETECT_MODE_1,
	78	ARIZONA_ACCDET_SRC, info->micd_modes[mode].src);
	79
	80	info->micd_mode = mode;
	81
	82	dev_dbg(arizona->dev, "Set jack polarity to %d\n", mode);
	83	}
	84
	85	static void arizona_start_mic(struct arizona_extcon_info *info)
	86	{
	87	struct arizona *arizona = info->arizona;
	88	bool change;
	89	int ret;
	90
	91	info->detecting = true;
	92	info->mic = false;
	93	info->jack_flips = 0;
	94
	95	/* Microphone detection can't use idle mode */
	96	pm_runtime_get(info->dev);
	97
	98	ret = regulator_enable(info->micvdd);
	99	if (ret != 0) {
	100	dev_err(arizona->dev, "Failed to enable MICVDD: %d\n",
	101	ret);
	102	}
	103
	104	if (info->micd_reva) {
	105	regmap_write(arizona->regmap, 0x80, 0x3);
	106	regmap_write(arizona->regmap, 0x294, 0);
	107	regmap_write(arizona->regmap, 0x80, 0x0);
	108	}
	109
	110	regmap_update_bits_check(arizona->regmap, ARIZONA_MIC_DETECT_1,
	111	ARIZONA_MICD_ENA, ARIZONA_MICD_ENA,
	112	&change);
	113	if (!change) {
	114	regulator_disable(info->micvdd);
	115	pm_runtime_put_autosuspend(info->dev);
	116	}
	117	}
	118
	119	static void arizona_stop_mic(struct arizona_extcon_info *info)
	120	{
	121	struct arizona *arizona = info->arizona;
	122	bool change;
	123
	124	regmap_update_bits_check(arizona->regmap, ARIZONA_MIC_DETECT_1,
	125	ARIZONA_MICD_ENA, 0,
	126	&change);
	127
	128	if (info->micd_reva) {
	129	regmap_write(arizona->regmap, 0x80, 0x3);
	130	regmap_write(arizona->regmap, 0x294, 2);
	131	regmap_write(arizona->regmap, 0x80, 0x0);
132	}
133
134	if (change) {
135	regulator_disable(info->micvdd);
136	pm_runtime_put_autosuspend(info->dev);
137	}
138	}
139
140	static irqreturn_t arizona_micdet(int irq, void *data)
141	{
142	struct arizona_extcon_info *info = data;
143	struct arizona *arizona = info->arizona;
144	unsigned int val;
145	int ret;
146
147	mutex_lock(&info->lock);
148
149	ret = regmap_read(arizona->regmap, ARIZONA_MIC_DETECT_3, &val);
150	if (ret != 0) {
151	dev_err(arizona->dev, "Failed to read MICDET: %d\n", ret);
152	return IRQ_NONE;
153	}
154
155	dev_dbg(arizona->dev, "MICDET: %x\n", val);
156
157	if (!(val & ARIZONA_MICD_VALID)) {
158	dev_warn(arizona->dev, "Microphone detection state invalid\n");
159	mutex_unlock(&info->lock);
160	return IRQ_NONE;
161	}
162
163	/* Due to jack detect this should never happen */
164	if (!(val & ARIZONA_MICD_STS)) {
165	dev_warn(arizona->dev, "Detected open circuit\n");
166	info->detecting = false;
167	goto handled;
168	}
169
170	/* If we got a high impedence we should have a headset, report it. */
171	if (info->detecting && (val & 0x400)) {
325c6423 MB	172	ret = extcon_update_state(&info->edev,
	173	1 << ARIZONA_CABLE_MICROPHONE \|
	174	1 << ARIZONA_CABLE_HEADPHONE,
	175	1 << ARIZONA_CABLE_MICROPHONE \|
	176	1 << ARIZONA_CABLE_HEADPHONE);
f2c32a88 MB	177
	178	if (ret != 0)
	179	dev_err(arizona->dev, "Headset report failed: %d\n",
	180	ret);
	181
	182	info->mic = true;
	183	info->detecting = false;
	184	goto handled;
	185	}
	186
	187	/* If we detected a lower impedence during initial startup
	188	* then we probably have the wrong polarity, flip it. Don't
	189	* do this for the lowest impedences to speed up detection of
	190	* plain headphones. If both polarities report a low
	191	* impedence then give up and report headphones.
	192	*/
	193	if (info->detecting && (val & 0x3f8)) {
	194	info->jack_flips++;
	195
	196	if (info->jack_flips >= info->micd_num_modes) {
	197	dev_dbg(arizona->dev, "Detected headphone\n");
	198	info->detecting = false;
9ef2224d MB	199	arizona_stop_mic(info);
9ef2224d MB	200
325c6423 MB	201	ret = extcon_set_cable_state_(&info->edev,
	202	ARIZONA_CABLE_HEADPHONE,
	203	true);
f2c32a88 MB	204	if (ret != 0)
	205	dev_err(arizona->dev,
	206	"Headphone report failed: %d\n",
	207	ret);
	208	} else {
	209	info->micd_mode++;
	210	if (info->micd_mode == info->micd_num_modes)
	211	info->micd_mode = 0;
	212	arizona_extcon_set_mode(info, info->micd_mode);
	213
	214	info->jack_flips++;
	215	}
	216
	217	goto handled;
	218	}
	219
	220	/*
	221	* If we're still detecting and we detect a short then we've
	222	* got a headphone. Otherwise it's a button press, the
	223	* button reporting is stubbed out for now.
	224	*/
	225	if (val & 0x3fc) {
	226	if (info->mic) {
	227	dev_dbg(arizona->dev, "Mic button detected\n");
	228
	229	} else if (info->detecting) {
	230	dev_dbg(arizona->dev, "Headphone detected\n");
	231	info->detecting = false;
	232	arizona_stop_mic(info);
	233
325c6423 MB	234	ret = extcon_set_cable_state_(&info->edev,
	235	ARIZONA_CABLE_HEADPHONE,
	236	true);
f2c32a88 MB	237	if (ret != 0)
	238	dev_err(arizona->dev,
	239	"Headphone report failed: %d\n",
	240	ret);
	241	} else {
	242	dev_warn(arizona->dev, "Button with no mic: %x\n",
	243	val);
	244	}
	245	} else {
	246	dev_dbg(arizona->dev, "Mic button released\n");
	247	}
	248
	249	handled:
	250	pm_runtime_mark_last_busy(info->dev);
	251	mutex_unlock(&info->lock);
	252
	253	return IRQ_HANDLED;
	254	}
	255
	256	static irqreturn_t arizona_jackdet(int irq, void *data)
	257	{
	258	struct arizona_extcon_info *info = data;
	259	struct arizona *arizona = info->arizona;
	260	unsigned int val;
	261	int ret;
	262
	263	pm_runtime_get_sync(info->dev);
	264
	265	mutex_lock(&info->lock);
	266
	267	ret = regmap_read(arizona->regmap, ARIZONA_AOD_IRQ_RAW_STATUS, &val);
	268	if (ret != 0) {
	269	dev_err(arizona->dev, "Failed to read jackdet status: %d\n",
	270	ret);
	271	mutex_unlock(&info->lock);
	272	pm_runtime_put_autosuspend(info->dev);
	273	return IRQ_NONE;
	274	}
	275
	276	if (val & ARIZONA_JD1_STS) {
	277	dev_dbg(arizona->dev, "Detected jack\n");
325c6423 MB	278	ret = extcon_set_cable_state_(&info->edev,
325c6423 MB	279	ARIZONA_CABLE_MECHANICAL, true);
f2c32a88 MB	280
	281	if (ret != 0)
	282	dev_err(arizona->dev, "Mechanical report failed: %d\n",
	283	ret);
	284
	285	arizona_start_mic(info);
	286	} else {
	287	dev_dbg(arizona->dev, "Detected jack removal\n");
	288
	289	arizona_stop_mic(info);
	290
	291	ret = extcon_update_state(&info->edev, 0xffffffff, 0);
	292	if (ret != 0)
	293	dev_err(arizona->dev, "Removal report failed: %d\n",
	294	ret);
	295	}
	296
	297	mutex_unlock(&info->lock);
	298
	299	pm_runtime_mark_last_busy(info->dev);
	300	pm_runtime_put_autosuspend(info->dev);
	301
	302	return IRQ_HANDLED;
	303	}
	304
	305	static int __devinit arizona_extcon_probe(struct platform_device *pdev)
	306	{
	307	struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
	308	struct arizona_pdata *pdata;
	309	struct arizona_extcon_info *info;
	310	int ret, mode;
	311
	312	pdata = dev_get_platdata(arizona->dev);
	313
	314	info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
	315	if (!info) {
	316	dev_err(&pdev->dev, "failed to allocate memory\n");
	317	ret = -ENOMEM;
	318	goto err;
	319	}
	320
	321	info->micvdd = devm_regulator_get(arizona->dev, "MICVDD");
	322	if (IS_ERR(info->micvdd)) {
	323	ret = PTR_ERR(info->micvdd);
	324	dev_err(arizona->dev, "Failed to get MICVDD: %d\n", ret);
	325	goto err;
	326	}
	327
	328	mutex_init(&info->lock);
	329	info->arizona = arizona;
	330	info->dev = &pdev->dev;
	331	info->detecting = true;
	332	platform_set_drvdata(pdev, info);
	333
	334	switch (arizona->type) {
	335	case WM5102:
	336	switch (arizona->rev) {
	337	case 0:
	338	info->micd_reva = true;
	339	break;
	340	default:
	341	break;
	342	}
	343	break;
344	default:
345	break;
346	}
347
348	info->edev.name = "Headset Jack";
349	info->edev.supported_cable = arizona_cable;
f2c32a88 MB	350
	351	ret = extcon_dev_register(&info->edev, arizona->dev);
	352	if (ret < 0) {
	353	dev_err(arizona->dev, "extcon_dev_regster() failed: %d\n",
	354	ret);
	355	goto err;
	356	}
	357
	358	if (pdata->num_micd_configs) {
	359	info->micd_modes = pdata->micd_configs;
	360	info->micd_num_modes = pdata->num_micd_configs;
	361	} else {
	362	info->micd_modes = micd_default_modes;
	363	info->micd_num_modes = ARRAY_SIZE(micd_default_modes);
	364	}
	365
	366	if (arizona->pdata.micd_pol_gpio > 0) {
	367	if (info->micd_modes[0].gpio)
	368	mode = GPIOF_OUT_INIT_HIGH;
	369	else
	370	mode = GPIOF_OUT_INIT_LOW;
	371
	372	ret = devm_gpio_request_one(&pdev->dev,
	373	arizona->pdata.micd_pol_gpio,
	374	mode,
	375	"MICD polarity");
	376	if (ret != 0) {
	377	dev_err(arizona->dev, "Failed to request GPIO%d: %d\n",
	378	arizona->pdata.micd_pol_gpio, ret);
	379	goto err_register;
	380	}
	381	}
	382
	383	arizona_extcon_set_mode(info, 0);
	384
	385	pm_runtime_enable(&pdev->dev);
	386	pm_runtime_idle(&pdev->dev);
	387	pm_runtime_get_sync(&pdev->dev);
	388
	389	ret = arizona_request_irq(arizona, ARIZONA_IRQ_JD_RISE,
	390	"JACKDET rise", arizona_jackdet, info);
	391	if (ret != 0) {
	392	dev_err(&pdev->dev, "Failed to get JACKDET rise IRQ: %d\n",
	393	ret);
	394	goto err_register;
	395	}
	396
	397	ret = arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_RISE, 1);
	398	if (ret != 0) {
	399	dev_err(&pdev->dev, "Failed to set JD rise IRQ wake: %d\n",
	400	ret);
	401	goto err_rise;
	402	}
	403
	404	ret = arizona_request_irq(arizona, ARIZONA_IRQ_JD_FALL,
	405	"JACKDET fall", arizona_jackdet, info);
	406	if (ret != 0) {
	407	dev_err(&pdev->dev, "Failed to get JD fall IRQ: %d\n", ret);
	408	goto err_rise_wake;
	409	}
	410
	411	ret = arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_FALL, 1);
	412	if (ret != 0) {
	413	dev_err(&pdev->dev, "Failed to set JD fall IRQ wake: %d\n",
414	ret);
415	goto err_fall;
416	}
417
418	ret = arizona_request_irq(arizona, ARIZONA_IRQ_MICDET,
419	"MICDET", arizona_micdet, info);
420	if (ret != 0) {
421	dev_err(&pdev->dev, "Failed to get MICDET IRQ: %d\n", ret);
422	goto err_fall_wake;
423	}
424
425	regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_1,
426	ARIZONA_MICD_BIAS_STARTTIME_MASK \|
427	ARIZONA_MICD_RATE_MASK,
428	7 << ARIZONA_MICD_BIAS_STARTTIME_SHIFT \|
429	8 << ARIZONA_MICD_RATE_SHIFT);
430
431	arizona_clk32k_enable(arizona);
432	regmap_update_bits(arizona->regmap, ARIZONA_JACK_DETECT_DEBOUNCE,
433	ARIZONA_JD1_DB, ARIZONA_JD1_DB);
434	regmap_update_bits(arizona->regmap, ARIZONA_JACK_DETECT_ANALOGUE,
435	ARIZONA_JD1_ENA, ARIZONA_JD1_ENA);
436
437	pm_runtime_put(&pdev->dev);
438
439	return 0;
440
441	err_fall_wake:
442	arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_FALL, 0);
443	err_fall:
444	arizona_free_irq(arizona, ARIZONA_IRQ_JD_FALL, info);
445	err_rise_wake:
446	arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_RISE, 0);
447	err_rise:
448	arizona_free_irq(arizona, ARIZONA_IRQ_JD_RISE, info);
449	err_register:
450	pm_runtime_disable(&pdev->dev);
451	extcon_dev_unregister(&info->edev);
452	err:
453	return ret;
454	}
455
456	static int __devexit arizona_extcon_remove(struct platform_device *pdev)
457	{
458	struct arizona_extcon_info *info = platform_get_drvdata(pdev);
459	struct arizona *arizona = info->arizona;
460
461	pm_runtime_disable(&pdev->dev);
462
463	arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_RISE, 0);
464	arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_FALL, 0);
465	arizona_free_irq(arizona, ARIZONA_IRQ_MICDET, info);
466	arizona_free_irq(arizona, ARIZONA_IRQ_JD_RISE, info);
467	arizona_free_irq(arizona, ARIZONA_IRQ_JD_FALL, info);
468	regmap_update_bits(arizona->regmap, ARIZONA_JACK_DETECT_ANALOGUE,
469	ARIZONA_JD1_ENA, 0);
470	arizona_clk32k_disable(arizona);
471	extcon_dev_unregister(&info->edev);
472
473	return 0;
474	}
475
476	static struct platform_driver arizona_extcon_driver = {
477	.driver = {
478	.name = "arizona-extcon",
479	.owner = THIS_MODULE,
480	},
481	.probe = arizona_extcon_probe,
482	.remove = __devexit_p(arizona_extcon_remove),
483	};
484
485	module_platform_driver(arizona_extcon_driver);
486
487	MODULE_DESCRIPTION("Arizona Extcon driver");
488	MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
489	MODULE_LICENSE("GPL");
490	MODULE_ALIAS("platform:extcon-arizona");