[mirror_ubuntu-artful-kernel.git] / drivers / extcon / extcon-max8997.c

/*
 * extcon-max8997.c - MAX8997 extcon driver to support MAX8997 MUIC
 *
 *  Copyright (C) 2012 Samsung Electronics
 *  Donggeun Kim <dg77.kim@samsung.com>
 *
 * 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/platform_device.h>
#include <linux/kobject.h>
#include <linux/mfd/max8997.h>
#include <linux/mfd/max8997-private.h>
#include <linux/extcon.h>
#include <linux/irqdomain.h>

#define	DEV_NAME			"max8997-muic"

struct max8997_muic_irq {
	unsigned int irq;
	const char *name;
	unsigned int virq;
};

static struct max8997_muic_irq muic_irqs[] = {
	{ MAX8997_MUICIRQ_ADCError, "muic-ADC_error" },
	{ MAX8997_MUICIRQ_ADCLow, "muic-ADC_low" },
	{ MAX8997_MUICIRQ_ADC, "muic-ADC" },
	{ MAX8997_MUICIRQ_VBVolt, "muic-VB_voltage" },
	{ MAX8997_MUICIRQ_DBChg, "muic-DB_charger" },
	{ MAX8997_MUICIRQ_DCDTmr, "muic-DCD_timer" },
	{ MAX8997_MUICIRQ_ChgDetRun, "muic-CDR_status" },
	{ MAX8997_MUICIRQ_ChgTyp, "muic-charger_type" },
	{ MAX8997_MUICIRQ_OVP, "muic-over_voltage" },
};

struct max8997_muic_info {
	struct device *dev;
	struct i2c_client *muic;
	struct max8997_muic_platform_data *muic_pdata;

	int irq;
	struct work_struct irq_work;

	enum max8997_muic_charger_type pre_charger_type;
	int pre_adc;

	struct mutex mutex;

	struct extcon_dev	*edev;
};

enum {
	EXTCON_CABLE_USB = 0,
	EXTCON_CABLE_USB_HOST,
	EXTCON_CABLE_TA,
	EXTCON_CABLE_FAST_CHARGER,
	EXTCON_CABLE_SLOW_CHARGER,
	EXTCON_CABLE_CHARGE_DOWNSTREAM,
	EXTCON_CABLE_MHL,
	EXTCON_CABLE_DOCK_DESK,
	EXTCON_CABLE_DOCK_CARD,
	EXTCON_CABLE_JIG,

	_EXTCON_CABLE_NUM,
};

static const char *max8997_extcon_cable[] = {
	[EXTCON_CABLE_USB]			= "USB",
	[EXTCON_CABLE_USB_HOST]			= "USB-Host",
	[EXTCON_CABLE_TA]			= "TA",
	[EXTCON_CABLE_FAST_CHARGER]		= "Fast-charger",
	[EXTCON_CABLE_SLOW_CHARGER]		= "Slow-charger",
	[EXTCON_CABLE_CHARGE_DOWNSTREAM]	= "Charge-downstream",
	[EXTCON_CABLE_MHL]			= "MHL",
	[EXTCON_CABLE_DOCK_DESK]		= "Dock-Desk",
	[EXTCON_CABLE_DOCK_CARD]		= "Dock-Card",
	[EXTCON_CABLE_JIG]			= "JIG",

	NULL,
};

/*
 * max8997_muic_set_path - Set hardware line according to attached cable
 * @info: the instance including private data of max8997 MUIC
 * @value: the path according to attached cable
 * @attached: the state of cable (true:attached, false:detached)
 *
 * The max8997 MUIC device share outside H/W line among a varity of cables,
 * so this function set internal path of H/W line according to the type of
 * attached cable.
 */
static int max8997_muic_set_path(struct max8997_muic_info *info,
		u8 val, bool attached)
{
	int ret = 0;
	u8 ctrl1, ctrl2 = 0;

	if (attached)
		ctrl1 = val;
	else
		ctrl1 = CONTROL1_SW_OPEN;

	ret = max8997_update_reg(info->muic,
			MAX8997_MUIC_REG_CONTROL1, ctrl1, COMP_SW_MASK);
	if (ret < 0) {
		dev_err(info->dev, "failed to update MUIC register\n");
		return -EAGAIN;
	}

	if (attached)
		ctrl2 |= CONTROL2_CPEN_MASK;	/* LowPwr=0, CPEn=1 */
	else
		ctrl2 |= CONTROL2_LOWPWR_MASK;	/* LowPwr=1, CPEn=0 */

	ret = max8997_update_reg(info->muic,
			MAX8997_MUIC_REG_CONTROL2, ctrl2,
			CONTROL2_LOWPWR_MASK | CONTROL2_CPEN_MASK);
	if (ret < 0) {
		dev_err(info->dev, "failed to update MUIC register\n");
		return -EAGAIN;
	}

	dev_info(info->dev,
		"CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
		ctrl1, ctrl2, attached ? "attached" : "detached");

	return 0;
}

static int max8997_muic_handle_usb(struct max8997_muic_info *info,
			enum max8997_muic_usb_type usb_type, bool attached)
{
	int ret = 0;

	if (usb_type == MAX8997_USB_HOST) {
		ret = max8997_muic_set_path(info, CONTROL1_SW_USB, attached);
		if (ret) {
			dev_err(info->dev, "failed to update muic register\n");
			goto out;
		}
	}

	switch (usb_type) {
	case MAX8997_USB_HOST:
		extcon_set_cable_state(info->edev, "USB-Host", attached);
		break;
	case MAX8997_USB_DEVICE:
		extcon_set_cable_state(info->edev, "USB", attached);
		break;
	default:
		ret = -EINVAL;
		break;
	}

out:
	return ret;
}

static int max8997_muic_handle_dock(struct max8997_muic_info *info,
			int adc, bool attached)
{
	int ret = 0;

	ret = max8997_muic_set_path(info, CONTROL1_SW_AUDIO, attached);
	if (ret) {
		dev_err(info->dev, "failed to update muic register\n");
		goto out;
	}

	switch (adc) {
	case MAX8997_ADC_DESKDOCK:
		extcon_set_cable_state(info->edev, "Dock-desk", attached);
		break;
	case MAX8997_ADC_CARDOCK:
		extcon_set_cable_state(info->edev, "Dock-card", attached);
		break;
	default:
		ret = -EINVAL;
		break;
	}
out:
	return ret;
}

static int max8997_muic_handle_jig_uart(struct max8997_muic_info *info,
			bool attached)
{
	int ret = 0;

	/* switch to UART */
	ret = max8997_muic_set_path(info, CONTROL1_SW_UART, attached);
	if (ret) {
		dev_err(info->dev, "failed to update muic register\n");
		goto out;
	}

	extcon_set_cable_state(info->edev, "JIG", attached);
out:
	return ret;
}

static int max8997_muic_handle_adc_detach(struct max8997_muic_info *info)
{
	int ret = 0;

	switch (info->pre_adc) {
	case MAX8997_ADC_GROUND:
		ret = max8997_muic_handle_usb(info, MAX8997_USB_HOST, false);
		break;
	case MAX8997_ADC_MHL:
		extcon_set_cable_state(info->edev, "MHL", false);
		break;
	case MAX8997_ADC_JIG_USB_1:
	case MAX8997_ADC_JIG_USB_2:
		ret = max8997_muic_handle_usb(info, MAX8997_USB_DEVICE, false);
		break;
	case MAX8997_ADC_DESKDOCK:
	case MAX8997_ADC_CARDOCK:
		ret = max8997_muic_handle_dock(info, info->pre_adc, false);
		break;
	case MAX8997_ADC_JIG_UART:
		ret = max8997_muic_handle_jig_uart(info, false);
		break;
	default:
		break;
	}

	return ret;
}

static int max8997_muic_handle_adc(struct max8997_muic_info *info, int adc)
{
	int ret = 0;

	switch (adc) {
	case MAX8997_ADC_GROUND:
		ret = max8997_muic_handle_usb(info, MAX8997_USB_HOST, true);
		break;
	case MAX8997_ADC_MHL:
		extcon_set_cable_state(info->edev, "MHL", true);
		break;
	case MAX8997_ADC_JIG_USB_1:
	case MAX8997_ADC_JIG_USB_2:
		ret = max8997_muic_handle_usb(info, MAX8997_USB_DEVICE, true);
		break;
	case MAX8997_ADC_DESKDOCK:
	case MAX8997_ADC_CARDOCK:
		ret = max8997_muic_handle_dock(info, adc, true);
		break;
	case MAX8997_ADC_JIG_UART:
		ret = max8997_muic_handle_jig_uart(info, true);
		break;
	case MAX8997_ADC_OPEN:
		ret = max8997_muic_handle_adc_detach(info);
		break;
	default:
		ret = -EINVAL;
		goto out;
	}

	info->pre_adc = adc;
out:
	return ret;
}

static int max8997_muic_handle_charger_type_detach(
				struct max8997_muic_info *info)
{
	switch (info->pre_charger_type) {
	case MAX8997_CHARGER_TYPE_USB:
		extcon_set_cable_state(info->edev, "USB", false);
		break;
	case MAX8997_CHARGER_TYPE_DOWNSTREAM_PORT:
		extcon_set_cable_state(info->edev, "Charge-downstream", false);
		break;
	case MAX8997_CHARGER_TYPE_DEDICATED_CHG:
		extcon_set_cable_state(info->edev, "TA", false);
		break;
	case MAX8997_CHARGER_TYPE_500MA:
		extcon_set_cable_state(info->edev, "Slow-charger", false);
		break;
	case MAX8997_CHARGER_TYPE_1A:
		extcon_set_cable_state(info->edev, "Fast-charger", false);
		break;
	default:
		return -EINVAL;
	}

	return 0;
}

static int max8997_muic_handle_charger_type(struct max8997_muic_info *info,
				enum max8997_muic_charger_type charger_type)
{
	u8 adc;
	int ret;

	ret = max8997_read_reg(info->muic, MAX8997_MUIC_REG_STATUS1, &adc);
	if (ret) {
		dev_err(info->dev, "failed to read muic register\n");
		goto out;
	}

	switch (charger_type) {
	case MAX8997_CHARGER_TYPE_NONE:
		ret = max8997_muic_handle_charger_type_detach(info);
		break;
	case MAX8997_CHARGER_TYPE_USB:
		if ((adc & STATUS1_ADC_MASK) == MAX8997_ADC_OPEN) {
			max8997_muic_handle_usb(info,
					MAX8997_USB_DEVICE, true);
		}
		break;
	case MAX8997_CHARGER_TYPE_DOWNSTREAM_PORT:
		extcon_set_cable_state(info->edev, "Charge-downstream", true);
		break;
	case MAX8997_CHARGER_TYPE_DEDICATED_CHG:
		extcon_set_cable_state(info->edev, "TA", true);
		break;
	case MAX8997_CHARGER_TYPE_500MA:
		extcon_set_cable_state(info->edev, "Slow-charger", true);
		break;
	case MAX8997_CHARGER_TYPE_1A:
		extcon_set_cable_state(info->edev, "Fast-charger", true);
		break;
	default:
		ret = -EINVAL;
		goto out;
	}

	info->pre_charger_type = charger_type;
out:
	return ret;
}

static void max8997_muic_irq_work(struct work_struct *work)
{
	struct max8997_muic_info *info = container_of(work,
			struct max8997_muic_info, irq_work);
	u8 status[2];
	u8 adc, chg_type;
	int irq_type = 0;
	int i, ret;

	mutex_lock(&info->mutex);

	ret = max8997_bulk_read(info->muic, MAX8997_MUIC_REG_STATUS1,
				2, status);
	if (ret) {
		dev_err(info->dev, "failed to read muic register\n");
		mutex_unlock(&info->mutex);
		return;
	}

	dev_dbg(info->dev, "%s: STATUS1:0x%x, 2:0x%x\n", __func__,
			status[0], status[1]);

	for (i = 0 ; i < ARRAY_SIZE(muic_irqs) ; i++)
		if (info->irq == muic_irqs[i].virq)
			irq_type = muic_irqs[i].irq;

	switch (irq_type) {
	case MAX8997_MUICIRQ_ADC:
		adc = status[0] & STATUS1_ADC_MASK;
		adc >>= STATUS1_ADC_SHIFT;

		max8997_muic_handle_adc(info, adc);
		break;
	case MAX8997_MUICIRQ_ChgTyp:
		chg_type = status[1] & STATUS2_CHGTYP_MASK;
		chg_type >>= STATUS2_CHGTYP_SHIFT;

		max8997_muic_handle_charger_type(info, chg_type);
		break;
	default:
		dev_info(info->dev, "misc interrupt: irq %d occurred\n",
				irq_type);
		break;
	}

	mutex_unlock(&info->mutex);

	return;
}

static irqreturn_t max8997_muic_irq_handler(int irq, void *data)
{
	struct max8997_muic_info *info = data;

	dev_dbg(info->dev, "irq:%d\n", irq);
	info->irq = irq;

	schedule_work(&info->irq_work);

	return IRQ_HANDLED;
}

static void max8997_muic_detect_dev(struct max8997_muic_info *info)
{
	int ret;
	u8 status[2], adc, chg_type;

	ret = max8997_bulk_read(info->muic, MAX8997_MUIC_REG_STATUS1,
				2, status);
	if (ret) {
		dev_err(info->dev, "failed to read muic register\n");
		return;
	}

	dev_info(info->dev, "STATUS1:0x%x, STATUS2:0x%x\n",
			status[0], status[1]);

	adc = status[0] & STATUS1_ADC_MASK;
	adc >>= STATUS1_ADC_SHIFT;

	chg_type = status[1] & STATUS2_CHGTYP_MASK;
	chg_type >>= STATUS2_CHGTYP_SHIFT;

	max8997_muic_handle_adc(info, adc);
	max8997_muic_handle_charger_type(info, chg_type);
}

static int max8997_muic_probe(struct platform_device *pdev)
{
	struct max8997_dev *max8997 = dev_get_drvdata(pdev->dev.parent);
	struct max8997_platform_data *pdata = dev_get_platdata(max8997->dev);
	struct max8997_muic_info *info;
	int ret, i;

	info = devm_kzalloc(&pdev->dev, sizeof(struct max8997_muic_info),
			    GFP_KERNEL);
	if (!info) {
		dev_err(&pdev->dev, "failed to allocate memory\n");
		return -ENOMEM;
	}

	info->dev = &pdev->dev;
	info->muic = max8997->muic;

	platform_set_drvdata(pdev, info);
	mutex_init(&info->mutex);

	INIT_WORK(&info->irq_work, max8997_muic_irq_work);

	for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) {
		struct max8997_muic_irq *muic_irq = &muic_irqs[i];
		unsigned int virq = 0;

		virq = irq_create_mapping(max8997->irq_domain, muic_irq->irq);
		if (!virq) {
			ret = -EINVAL;
			goto err_irq;
		}
		muic_irq->virq = virq;

		ret = request_threaded_irq(virq, NULL,
				max8997_muic_irq_handler,
				IRQF_NO_SUSPEND,
				muic_irq->name, info);
		if (ret) {
			dev_err(&pdev->dev,
				"failed: irq request (IRQ: %d,"
				" error :%d)\n",
				muic_irq->irq, ret);
			goto err_irq;
		}
	}

	/* External connector */
	info->edev = devm_kzalloc(&pdev->dev, sizeof(struct extcon_dev),
				  GFP_KERNEL);
	if (!info->edev) {
		dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
		ret = -ENOMEM;
		goto err_irq;
	}
	info->edev->name = DEV_NAME;
	info->edev->supported_cable = max8997_extcon_cable;
	ret = extcon_dev_register(info->edev, NULL);
	if (ret) {
		dev_err(&pdev->dev, "failed to register extcon device\n");
		goto err_irq;
	}

	/* Initialize registers according to platform data */
	if (pdata->muic_pdata) {
		struct max8997_muic_platform_data *mdata = info->muic_pdata;

		for (i = 0; i < mdata->num_init_data; i++) {
			max8997_write_reg(info->muic, mdata->init_data[i].addr,
					mdata->init_data[i].data);
		}
	}

	/* Initial device detection */
	max8997_muic_detect_dev(info);

	return ret;

err_irq:
	while (--i >= 0)
		free_irq(muic_irqs[i].virq, info);
	return ret;
}

static int max8997_muic_remove(struct platform_device *pdev)
{
	struct max8997_muic_info *info = platform_get_drvdata(pdev);
	int i;

	for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
		free_irq(muic_irqs[i].virq, info);
	cancel_work_sync(&info->irq_work);

	extcon_dev_unregister(info->edev);

	return 0;
}

static struct platform_driver max8997_muic_driver = {
	.driver		= {
		.name	= DEV_NAME,
		.owner	= THIS_MODULE,
	},
	.probe		= max8997_muic_probe,
	.remove		= max8997_muic_remove,
};

module_platform_driver(max8997_muic_driver);

MODULE_DESCRIPTION("Maxim MAX8997 Extcon driver");
MODULE_AUTHOR("Donggeun Kim <dg77.kim@samsung.com>");
MODULE_LICENSE("GPL");
Commit	Line	Data
99f09beb	1	/*
b76668ba	2	* extcon-max8997.c - MAX8997 extcon driver to support MAX8997 MUIC
99f09beb	3	*
2ca36f4a	4	* Copyright (C) 2012 Samsung Electronics
99f09beb DK	5	* Donggeun Kim <dg77.kim@samsung.com>
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation; either version 2 of the License, or
	10	* (at your option) any later version.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
99f09beb DK	16	*/
	17
	18	#include <linux/kernel.h>
	19	#include <linux/module.h>
	20	#include <linux/i2c.h>
	21	#include <linux/slab.h>
	22	#include <linux/interrupt.h>
	23	#include <linux/err.h>
	24	#include <linux/platform_device.h>
	25	#include <linux/kobject.h>
	26	#include <linux/mfd/max8997.h>
	27	#include <linux/mfd/max8997-private.h>
b76668ba	28	#include <linux/extcon.h>
dca1a71e	29	#include <linux/irqdomain.h>
b76668ba CC	30
b76668ba CC	31	#define DEV_NAME "max8997-muic"
99f09beb	32
99f09beb DK	33	struct max8997_muic_irq {
	34	unsigned int irq;
	35	const char *name;
dca1a71e	36	unsigned int virq;
99f09beb DK	37	};
	38
	39	static struct max8997_muic_irq muic_irqs[] = {
	40	{ MAX8997_MUICIRQ_ADCError, "muic-ADC_error" },
	41	{ MAX8997_MUICIRQ_ADCLow, "muic-ADC_low" },
	42	{ MAX8997_MUICIRQ_ADC, "muic-ADC" },
	43	{ MAX8997_MUICIRQ_VBVolt, "muic-VB_voltage" },
	44	{ MAX8997_MUICIRQ_DBChg, "muic-DB_charger" },
	45	{ MAX8997_MUICIRQ_DCDTmr, "muic-DCD_timer" },
	46	{ MAX8997_MUICIRQ_ChgDetRun, "muic-CDR_status" },
	47	{ MAX8997_MUICIRQ_ChgTyp, "muic-charger_type" },
	48	{ MAX8997_MUICIRQ_OVP, "muic-over_voltage" },
	49	};
	50
	51	struct max8997_muic_info {
	52	struct device *dev;
99f09beb DK	53	struct i2c_client *muic;
	54	struct max8997_muic_platform_data *muic_pdata;
	55
	56	int irq;
	57	struct work_struct irq_work;
	58
	59	enum max8997_muic_charger_type pre_charger_type;
	60	int pre_adc;
	61
	62	struct mutex mutex;
b76668ba CC	63
	64	struct extcon_dev *edev;
	65	};
	66
e3e5bc02 CC	67	enum {
	68	EXTCON_CABLE_USB = 0,
	69	EXTCON_CABLE_USB_HOST,
	70	EXTCON_CABLE_TA,
	71	EXTCON_CABLE_FAST_CHARGER,
	72	EXTCON_CABLE_SLOW_CHARGER,
	73	EXTCON_CABLE_CHARGE_DOWNSTREAM,
	74	EXTCON_CABLE_MHL,
	75	EXTCON_CABLE_DOCK_DESK,
	76	EXTCON_CABLE_DOCK_CARD,
	77	EXTCON_CABLE_JIG,
	78
	79	_EXTCON_CABLE_NUM,
	80	};
	81
cae93db3	82	static const char *max8997_extcon_cable[] = {
e3e5bc02 CC	83	[EXTCON_CABLE_USB] = "USB",
	84	[EXTCON_CABLE_USB_HOST] = "USB-Host",
	85	[EXTCON_CABLE_TA] = "TA",
	86	[EXTCON_CABLE_FAST_CHARGER] = "Fast-charger",
	87	[EXTCON_CABLE_SLOW_CHARGER] = "Slow-charger",
	88	[EXTCON_CABLE_CHARGE_DOWNSTREAM] = "Charge-downstream",
	89	[EXTCON_CABLE_MHL] = "MHL",
	90	[EXTCON_CABLE_DOCK_DESK] = "Dock-Desk",
	91	[EXTCON_CABLE_DOCK_CARD] = "Dock-Card",
	92	[EXTCON_CABLE_JIG] = "JIG",
b76668ba CC	93
b76668ba CC	94	NULL,
99f09beb DK	95	};
99f09beb DK	96
07c70503 CC	97	/*
	98	* max8997_muic_set_path - Set hardware line according to attached cable
	99	* @info: the instance including private data of max8997 MUIC
	100	* @value: the path according to attached cable
	101	* @attached: the state of cable (true:attached, false:detached)
	102	*
	103	* The max8997 MUIC device share outside H/W line among a varity of cables,
	104	* so this function set internal path of H/W line according to the type of
	105	* attached cable.
	106	*/
	107	static int max8997_muic_set_path(struct max8997_muic_info *info,
	108	u8 val, bool attached)
	109	{
	110	int ret = 0;
	111	u8 ctrl1, ctrl2 = 0;
	112
	113	if (attached)
	114	ctrl1 = val;
	115	else
	116	ctrl1 = CONTROL1_SW_OPEN;
	117
	118	ret = max8997_update_reg(info->muic,
	119	MAX8997_MUIC_REG_CONTROL1, ctrl1, COMP_SW_MASK);
	120	if (ret < 0) {
	121	dev_err(info->dev, "failed to update MUIC register\n");
	122	return -EAGAIN;
	123	}
	124
	125	if (attached)
	126	ctrl2 \|= CONTROL2_CPEN_MASK; /* LowPwr=0, CPEn=1 */
	127	else
	128	ctrl2 \|= CONTROL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */
	129
	130	ret = max8997_update_reg(info->muic,
	131	MAX8997_MUIC_REG_CONTROL2, ctrl2,
	132	CONTROL2_LOWPWR_MASK \| CONTROL2_CPEN_MASK);
	133	if (ret < 0) {
	134	dev_err(info->dev, "failed to update MUIC register\n");
	135	return -EAGAIN;
	136	}
	137
	138	dev_info(info->dev,
	139	"CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
	140	ctrl1, ctrl2, attached ? "attached" : "detached");
	141
	142	return 0;
	143	}
	144
99f09beb DK	145	static int max8997_muic_handle_usb(struct max8997_muic_info *info,
	146	enum max8997_muic_usb_type usb_type, bool attached)
	147	{
99f09beb DK	148	int ret = 0;
	149
	150	if (usb_type == MAX8997_USB_HOST) {
07c70503	151	ret = max8997_muic_set_path(info, CONTROL1_SW_USB, attached);
99f09beb DK	152	if (ret) {
	153	dev_err(info->dev, "failed to update muic register\n");
	154	goto out;
	155	}
	156	}
	157
b76668ba CC	158	switch (usb_type) {
	159	case MAX8997_USB_HOST:
	160	extcon_set_cable_state(info->edev, "USB-Host", attached);
	161	break;
	162	case MAX8997_USB_DEVICE:
	163	extcon_set_cable_state(info->edev, "USB", attached);
	164	break;
	165	default:
	166	ret = -EINVAL;
	167	break;
	168	}
	169
99f09beb DK	170	out:
	171	return ret;
	172	}
	173
99f09beb DK	174	static int max8997_muic_handle_dock(struct max8997_muic_info *info,
	175	int adc, bool attached)
	176	{
99f09beb DK	177	int ret = 0;
99f09beb DK	178
07c70503	179	ret = max8997_muic_set_path(info, CONTROL1_SW_AUDIO, attached);
99f09beb DK	180	if (ret) {
	181	dev_err(info->dev, "failed to update muic register\n");
	182	goto out;
	183	}
	184
	185	switch (adc) {
	186	case MAX8997_ADC_DESKDOCK:
b76668ba	187	extcon_set_cable_state(info->edev, "Dock-desk", attached);
99f09beb DK	188	break;
99f09beb DK	189	case MAX8997_ADC_CARDOCK:
b76668ba	190	extcon_set_cable_state(info->edev, "Dock-card", attached);
99f09beb DK	191	break;
99f09beb DK	192	default:
b76668ba	193	ret = -EINVAL;
99f09beb DK	194	break;
	195	}
	196	out:
	197	return ret;
	198	}
	199
	200	static int max8997_muic_handle_jig_uart(struct max8997_muic_info *info,
	201	bool attached)
	202	{
99f09beb DK	203	int ret = 0;
	204
	205	/* switch to UART */
07c70503	206	ret = max8997_muic_set_path(info, CONTROL1_SW_UART, attached);
99f09beb DK	207	if (ret) {
	208	dev_err(info->dev, "failed to update muic register\n");
	209	goto out;
	210	}
	211
b76668ba	212	extcon_set_cable_state(info->edev, "JIG", attached);
99f09beb DK	213	out:
	214	return ret;
	215	}
	216
	217	static int max8997_muic_handle_adc_detach(struct max8997_muic_info *info)
	218	{
	219	int ret = 0;
	220
	221	switch (info->pre_adc) {
	222	case MAX8997_ADC_GROUND:
	223	ret = max8997_muic_handle_usb(info, MAX8997_USB_HOST, false);
	224	break;
	225	case MAX8997_ADC_MHL:
b76668ba	226	extcon_set_cable_state(info->edev, "MHL", false);
99f09beb DK	227	break;
	228	case MAX8997_ADC_JIG_USB_1:
	229	case MAX8997_ADC_JIG_USB_2:
	230	ret = max8997_muic_handle_usb(info, MAX8997_USB_DEVICE, false);
	231	break;
	232	case MAX8997_ADC_DESKDOCK:
	233	case MAX8997_ADC_CARDOCK:
	234	ret = max8997_muic_handle_dock(info, info->pre_adc, false);
	235	break;
	236	case MAX8997_ADC_JIG_UART:
	237	ret = max8997_muic_handle_jig_uart(info, false);
	238	break;
	239	default:
	240	break;
	241	}
	242
	243	return ret;
	244	}
	245
	246	static int max8997_muic_handle_adc(struct max8997_muic_info *info, int adc)
	247	{
	248	int ret = 0;
	249
	250	switch (adc) {
	251	case MAX8997_ADC_GROUND:
	252	ret = max8997_muic_handle_usb(info, MAX8997_USB_HOST, true);
	253	break;
	254	case MAX8997_ADC_MHL:
b76668ba	255	extcon_set_cable_state(info->edev, "MHL", true);
99f09beb DK	256	break;
	257	case MAX8997_ADC_JIG_USB_1:
	258	case MAX8997_ADC_JIG_USB_2:
	259	ret = max8997_muic_handle_usb(info, MAX8997_USB_DEVICE, true);
	260	break;
	261	case MAX8997_ADC_DESKDOCK:
	262	case MAX8997_ADC_CARDOCK:
	263	ret = max8997_muic_handle_dock(info, adc, true);
	264	break;
	265	case MAX8997_ADC_JIG_UART:
	266	ret = max8997_muic_handle_jig_uart(info, true);
	267	break;
	268	case MAX8997_ADC_OPEN:
	269	ret = max8997_muic_handle_adc_detach(info);
	270	break;
	271	default:
b76668ba CC	272	ret = -EINVAL;
b76668ba CC	273	goto out;
99f09beb DK	274	}
	275
	276	info->pre_adc = adc;
b76668ba CC	277	out:
	278	return ret;
	279	}
	280
	281	static int max8997_muic_handle_charger_type_detach(
	282	struct max8997_muic_info *info)
	283	{
b76668ba CC	284	switch (info->pre_charger_type) {
	285	case MAX8997_CHARGER_TYPE_USB:
	286	extcon_set_cable_state(info->edev, "USB", false);
	287	break;
	288	case MAX8997_CHARGER_TYPE_DOWNSTREAM_PORT:
	289	extcon_set_cable_state(info->edev, "Charge-downstream", false);
	290	break;
	291	case MAX8997_CHARGER_TYPE_DEDICATED_CHG:
	292	extcon_set_cable_state(info->edev, "TA", false);
	293	break;
	294	case MAX8997_CHARGER_TYPE_500MA:
	295	extcon_set_cable_state(info->edev, "Slow-charger", false);
	296	break;
	297	case MAX8997_CHARGER_TYPE_1A:
	298	extcon_set_cable_state(info->edev, "Fast-charger", false);
	299	break;
	300	default:
3cafbd4e	301	return -EINVAL;
b76668ba	302	}
99f09beb	303
3cafbd4e	304	return 0;
99f09beb DK	305	}
	306
	307	static int max8997_muic_handle_charger_type(struct max8997_muic_info *info,
	308	enum max8997_muic_charger_type charger_type)
	309	{
99f09beb DK	310	u8 adc;
	311	int ret;
	312
	313	ret = max8997_read_reg(info->muic, MAX8997_MUIC_REG_STATUS1, &adc);
	314	if (ret) {
	315	dev_err(info->dev, "failed to read muic register\n");
	316	goto out;
	317	}
	318
	319	switch (charger_type) {
	320	case MAX8997_CHARGER_TYPE_NONE:
b76668ba	321	ret = max8997_muic_handle_charger_type_detach(info);
99f09beb DK	322	break;
	323	case MAX8997_CHARGER_TYPE_USB:
	324	if ((adc & STATUS1_ADC_MASK) == MAX8997_ADC_OPEN) {
	325	max8997_muic_handle_usb(info,
	326	MAX8997_USB_DEVICE, true);
	327	}
99f09beb DK	328	break;
99f09beb DK	329	case MAX8997_CHARGER_TYPE_DOWNSTREAM_PORT:
b76668ba CC	330	extcon_set_cable_state(info->edev, "Charge-downstream", true);
b76668ba CC	331	break;
99f09beb	332	case MAX8997_CHARGER_TYPE_DEDICATED_CHG:
b76668ba CC	333	extcon_set_cable_state(info->edev, "TA", true);
b76668ba CC	334	break;
99f09beb	335	case MAX8997_CHARGER_TYPE_500MA:
b76668ba CC	336	extcon_set_cable_state(info->edev, "Slow-charger", true);
b76668ba CC	337	break;
99f09beb	338	case MAX8997_CHARGER_TYPE_1A:
b76668ba	339	extcon_set_cable_state(info->edev, "Fast-charger", true);
99f09beb DK	340	break;
99f09beb DK	341	default:
b76668ba CC	342	ret = -EINVAL;
b76668ba CC	343	goto out;
99f09beb DK	344	}
	345
	346	info->pre_charger_type = charger_type;
	347	out:
	348	return ret;
	349	}
	350
	351	static void max8997_muic_irq_work(struct work_struct *work)
	352	{
	353	struct max8997_muic_info *info = container_of(work,
	354	struct max8997_muic_info, irq_work);
b76668ba	355	u8 status[2];
71e58782	356	u8 adc, chg_type;
dca1a71e CC	357	int irq_type = 0;
dca1a71e CC	358	int i, ret;
99f09beb DK	359
	360	mutex_lock(&info->mutex);
	361
	362	ret = max8997_bulk_read(info->muic, MAX8997_MUIC_REG_STATUS1,
b76668ba	363	2, status);
99f09beb DK	364	if (ret) {
	365	dev_err(info->dev, "failed to read muic register\n");
	366	mutex_unlock(&info->mutex);
	367	return;
	368	}
	369
	370	dev_dbg(info->dev, "%s: STATUS1:0x%x, 2:0x%x\n", __func__,
	371	status[0], status[1]);
	372
dca1a71e CC	373	for (i = 0 ; i < ARRAY_SIZE(muic_irqs) ; i++)
	374	if (info->irq == muic_irqs[i].virq)
	375	irq_type = muic_irqs[i].irq;
	376
99f09beb	377	switch (irq_type) {
99f09beb DK	378	case MAX8997_MUICIRQ_ADC:
	379	adc = status[0] & STATUS1_ADC_MASK;
	380	adc >>= STATUS1_ADC_SHIFT;
	381
	382	max8997_muic_handle_adc(info, adc);
99f09beb DK	383	break;
	384	case MAX8997_MUICIRQ_ChgTyp:
	385	chg_type = status[1] & STATUS2_CHGTYP_MASK;
	386	chg_type >>= STATUS2_CHGTYP_SHIFT;
	387
	388	max8997_muic_handle_charger_type(info, chg_type);
99f09beb DK	389	break;
99f09beb DK	390	default:
b76668ba CC	391	dev_info(info->dev, "misc interrupt: irq %d occurred\n",
b76668ba CC	392	irq_type);
99f09beb DK	393	break;
	394	}
	395
99f09beb DK	396	mutex_unlock(&info->mutex);
	397
	398	return;
	399	}
	400
	401	static irqreturn_t max8997_muic_irq_handler(int irq, void *data)
	402	{
	403	struct max8997_muic_info *info = data;
	404
	405	dev_dbg(info->dev, "irq:%d\n", irq);
	406	info->irq = irq;
	407
	408	schedule_work(&info->irq_work);
	409
	410	return IRQ_HANDLED;
	411	}
	412
	413	static void max8997_muic_detect_dev(struct max8997_muic_info *info)
	414	{
	415	int ret;
	416	u8 status[2], adc, chg_type;
	417
	418	ret = max8997_bulk_read(info->muic, MAX8997_MUIC_REG_STATUS1,
	419	2, status);
	420	if (ret) {
	421	dev_err(info->dev, "failed to read muic register\n");
	422	return;
	423	}
	424
	425	dev_info(info->dev, "STATUS1:0x%x, STATUS2:0x%x\n",
	426	status[0], status[1]);
	427
	428	adc = status[0] & STATUS1_ADC_MASK;
	429	adc >>= STATUS1_ADC_SHIFT;
	430
	431	chg_type = status[1] & STATUS2_CHGTYP_MASK;
	432	chg_type >>= STATUS2_CHGTYP_SHIFT;
	433
	434	max8997_muic_handle_adc(info, adc);
	435	max8997_muic_handle_charger_type(info, chg_type);
	436	}
	437
44f34fd4	438	static int max8997_muic_probe(struct platform_device *pdev)
99f09beb	439	{
b76668ba CC	440	struct max8997_dev *max8997 = dev_get_drvdata(pdev->dev.parent);
b76668ba CC	441	struct max8997_platform_data *pdata = dev_get_platdata(max8997->dev);
99f09beb DK	442	struct max8997_muic_info *info;
	443	int ret, i;
	444
0b672e9b SK	445	info = devm_kzalloc(&pdev->dev, sizeof(struct max8997_muic_info),
0b672e9b SK	446	GFP_KERNEL);
99f09beb DK	447	if (!info) {
99f09beb DK	448	dev_err(&pdev->dev, "failed to allocate memory\n");
0b672e9b	449	return -ENOMEM;
99f09beb DK	450	}
99f09beb DK	451
99f09beb	452	info->dev = &pdev->dev;
b76668ba	453	info->muic = max8997->muic;
99f09beb DK	454
	455	platform_set_drvdata(pdev, info);
	456	mutex_init(&info->mutex);
	457
99f09beb DK	458	INIT_WORK(&info->irq_work, max8997_muic_irq_work);
	459
	460	for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) {
	461	struct max8997_muic_irq *muic_irq = &muic_irqs[i];
68c9274d	462	unsigned int virq = 0;
dca1a71e CC	463
dca1a71e CC	464	virq = irq_create_mapping(max8997->irq_domain, muic_irq->irq);
68c9274d SK	465	if (!virq) {
68c9274d SK	466	ret = -EINVAL;
dca1a71e	467	goto err_irq;
68c9274d	468	}
dca1a71e	469	muic_irq->virq = virq;
99f09beb	470
ae3b3215 CC	471	ret = request_threaded_irq(virq, NULL,
	472	max8997_muic_irq_handler,
	473	IRQF_NO_SUSPEND,
	474	muic_irq->name, info);
99f09beb DK	475	if (ret) {
	476	dev_err(&pdev->dev,
	477	"failed: irq request (IRQ: %d,"
	478	" error :%d)\n",
	479	muic_irq->irq, ret);
99f09beb DK	480	goto err_irq;
	481	}
	482	}
	483
b76668ba	484	/* External connector */
0b672e9b SK	485	info->edev = devm_kzalloc(&pdev->dev, sizeof(struct extcon_dev),
0b672e9b SK	486	GFP_KERNEL);
b76668ba CC	487	if (!info->edev) {
	488	dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
	489	ret = -ENOMEM;
	490	goto err_irq;
	491	}
	492	info->edev->name = DEV_NAME;
	493	info->edev->supported_cable = max8997_extcon_cable;
	494	ret = extcon_dev_register(info->edev, NULL);
	495	if (ret) {
	496	dev_err(&pdev->dev, "failed to register extcon device\n");
0b672e9b	497	goto err_irq;
b76668ba CC	498	}
b76668ba CC	499
99f09beb	500	/* Initialize registers according to platform data */
b76668ba CC	501	if (pdata->muic_pdata) {
	502	struct max8997_muic_platform_data *mdata = info->muic_pdata;
	503
	504	for (i = 0; i < mdata->num_init_data; i++) {
	505	max8997_write_reg(info->muic, mdata->init_data[i].addr,
	506	mdata->init_data[i].data);
	507	}
	508	}
99f09beb DK	509
	510	/* Initial device detection */
	511	max8997_muic_detect_dev(info);
	512
	513	return ret;
	514
	515	err_irq:
3241d56e	516	while (--i >= 0)
dca1a71e	517	free_irq(muic_irqs[i].virq, info);
99f09beb DK	518	return ret;
	519	}
	520
93ed0327	521	static int max8997_muic_remove(struct platform_device *pdev)
99f09beb DK	522	{
99f09beb DK	523	struct max8997_muic_info *info = platform_get_drvdata(pdev);
99f09beb DK	524	int i;
99f09beb DK	525
99f09beb	526	for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
dca1a71e	527	free_irq(muic_irqs[i].virq, info);
71e58782	528	cancel_work_sync(&info->irq_work);
99f09beb	529
b76668ba CC	530	extcon_dev_unregister(info->edev);
b76668ba CC	531
99f09beb DK	532	return 0;
	533	}
	534
	535	static struct platform_driver max8997_muic_driver = {
	536	.driver = {
b76668ba	537	.name = DEV_NAME,
99f09beb DK	538	.owner = THIS_MODULE,
	539	},
	540	.probe = max8997_muic_probe,
5f7e2228	541	.remove = max8997_muic_remove,
99f09beb DK	542	};
99f09beb DK	543
b00e126f	544	module_platform_driver(max8997_muic_driver);
99f09beb	545
b76668ba	546	MODULE_DESCRIPTION("Maxim MAX8997 Extcon driver");
99f09beb DK	547	MODULE_AUTHOR("Donggeun Kim <dg77.kim@samsung.com>");
99f09beb DK	548	MODULE_LICENSE("GPL");