[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,
};

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) {
		/* switch to USB */
		ret = max8997_update_reg(info->muic, MAX8997_MUIC_REG_CONTROL1,
				attached ? CONTROL1_SW_USB : CONTROL1_SW_OPEN,
				CONTROL1_SW_MASK);
		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;

	/* switch to AUDIO */
	ret = max8997_update_reg(info->muic, MAX8997_MUIC_REG_CONTROL1,
				attached ? CONTROL1_SW_AUDIO : CONTROL1_SW_OPEN,
				CONTROL1_SW_MASK);
	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_update_reg(info->muic, MAX8997_MUIC_REG_CONTROL1,
				attached ? CONTROL1_SW_UART : CONTROL1_SW_OPEN,
				CONTROL1_SW_MASK);
	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	};
	96
	97	static int max8997_muic_handle_usb(struct max8997_muic_info *info,
	98	enum max8997_muic_usb_type usb_type, bool attached)
	99	{
99f09beb DK	100	int ret = 0;
	101
	102	if (usb_type == MAX8997_USB_HOST) {
	103	/* switch to USB */
	104	ret = max8997_update_reg(info->muic, MAX8997_MUIC_REG_CONTROL1,
e3e5bc02 CC	105	attached ? CONTROL1_SW_USB : CONTROL1_SW_OPEN,
e3e5bc02 CC	106	CONTROL1_SW_MASK);
99f09beb DK	107	if (ret) {
	108	dev_err(info->dev, "failed to update muic register\n");
	109	goto out;
	110	}
	111	}
	112
b76668ba CC	113	switch (usb_type) {
	114	case MAX8997_USB_HOST:
	115	extcon_set_cable_state(info->edev, "USB-Host", attached);
	116	break;
	117	case MAX8997_USB_DEVICE:
	118	extcon_set_cable_state(info->edev, "USB", attached);
	119	break;
	120	default:
	121	ret = -EINVAL;
	122	break;
	123	}
	124
99f09beb DK	125	out:
	126	return ret;
	127	}
	128
99f09beb DK	129	static int max8997_muic_handle_dock(struct max8997_muic_info *info,
	130	int adc, bool attached)
	131	{
99f09beb DK	132	int ret = 0;
	133
	134	/* switch to AUDIO */
	135	ret = max8997_update_reg(info->muic, MAX8997_MUIC_REG_CONTROL1,
e3e5bc02 CC	136	attached ? CONTROL1_SW_AUDIO : CONTROL1_SW_OPEN,
e3e5bc02 CC	137	CONTROL1_SW_MASK);
99f09beb DK	138	if (ret) {
	139	dev_err(info->dev, "failed to update muic register\n");
	140	goto out;
	141	}
	142
	143	switch (adc) {
	144	case MAX8997_ADC_DESKDOCK:
b76668ba	145	extcon_set_cable_state(info->edev, "Dock-desk", attached);
99f09beb DK	146	break;
99f09beb DK	147	case MAX8997_ADC_CARDOCK:
b76668ba	148	extcon_set_cable_state(info->edev, "Dock-card", attached);
99f09beb DK	149	break;
99f09beb DK	150	default:
b76668ba	151	ret = -EINVAL;
99f09beb DK	152	break;
	153	}
	154	out:
	155	return ret;
	156	}
	157
	158	static int max8997_muic_handle_jig_uart(struct max8997_muic_info *info,
	159	bool attached)
	160	{
99f09beb DK	161	int ret = 0;
	162
	163	/* switch to UART */
	164	ret = max8997_update_reg(info->muic, MAX8997_MUIC_REG_CONTROL1,
e3e5bc02 CC	165	attached ? CONTROL1_SW_UART : CONTROL1_SW_OPEN,
e3e5bc02 CC	166	CONTROL1_SW_MASK);
99f09beb DK	167	if (ret) {
	168	dev_err(info->dev, "failed to update muic register\n");
	169	goto out;
	170	}
	171
b76668ba	172	extcon_set_cable_state(info->edev, "JIG", attached);
99f09beb DK	173	out:
	174	return ret;
	175	}
	176
	177	static int max8997_muic_handle_adc_detach(struct max8997_muic_info *info)
	178	{
	179	int ret = 0;
	180
	181	switch (info->pre_adc) {
	182	case MAX8997_ADC_GROUND:
	183	ret = max8997_muic_handle_usb(info, MAX8997_USB_HOST, false);
	184	break;
	185	case MAX8997_ADC_MHL:
b76668ba	186	extcon_set_cable_state(info->edev, "MHL", false);
99f09beb DK	187	break;
	188	case MAX8997_ADC_JIG_USB_1:
	189	case MAX8997_ADC_JIG_USB_2:
	190	ret = max8997_muic_handle_usb(info, MAX8997_USB_DEVICE, false);
	191	break;
	192	case MAX8997_ADC_DESKDOCK:
	193	case MAX8997_ADC_CARDOCK:
	194	ret = max8997_muic_handle_dock(info, info->pre_adc, false);
	195	break;
	196	case MAX8997_ADC_JIG_UART:
	197	ret = max8997_muic_handle_jig_uart(info, false);
	198	break;
	199	default:
	200	break;
	201	}
	202
	203	return ret;
	204	}
	205
	206	static int max8997_muic_handle_adc(struct max8997_muic_info *info, int adc)
	207	{
	208	int ret = 0;
	209
	210	switch (adc) {
	211	case MAX8997_ADC_GROUND:
	212	ret = max8997_muic_handle_usb(info, MAX8997_USB_HOST, true);
	213	break;
	214	case MAX8997_ADC_MHL:
b76668ba	215	extcon_set_cable_state(info->edev, "MHL", true);
99f09beb DK	216	break;
	217	case MAX8997_ADC_JIG_USB_1:
	218	case MAX8997_ADC_JIG_USB_2:
	219	ret = max8997_muic_handle_usb(info, MAX8997_USB_DEVICE, true);
	220	break;
	221	case MAX8997_ADC_DESKDOCK:
	222	case MAX8997_ADC_CARDOCK:
	223	ret = max8997_muic_handle_dock(info, adc, true);
	224	break;
	225	case MAX8997_ADC_JIG_UART:
	226	ret = max8997_muic_handle_jig_uart(info, true);
	227	break;
	228	case MAX8997_ADC_OPEN:
	229	ret = max8997_muic_handle_adc_detach(info);
	230	break;
	231	default:
b76668ba CC	232	ret = -EINVAL;
b76668ba CC	233	goto out;
99f09beb DK	234	}
	235
	236	info->pre_adc = adc;
b76668ba CC	237	out:
	238	return ret;
	239	}
	240
	241	static int max8997_muic_handle_charger_type_detach(
	242	struct max8997_muic_info *info)
	243	{
b76668ba CC	244	switch (info->pre_charger_type) {
	245	case MAX8997_CHARGER_TYPE_USB:
	246	extcon_set_cable_state(info->edev, "USB", false);
	247	break;
	248	case MAX8997_CHARGER_TYPE_DOWNSTREAM_PORT:
	249	extcon_set_cable_state(info->edev, "Charge-downstream", false);
	250	break;
	251	case MAX8997_CHARGER_TYPE_DEDICATED_CHG:
	252	extcon_set_cable_state(info->edev, "TA", false);
	253	break;
	254	case MAX8997_CHARGER_TYPE_500MA:
	255	extcon_set_cable_state(info->edev, "Slow-charger", false);
	256	break;
	257	case MAX8997_CHARGER_TYPE_1A:
	258	extcon_set_cable_state(info->edev, "Fast-charger", false);
	259	break;
	260	default:
3cafbd4e	261	return -EINVAL;
b76668ba	262	}
99f09beb	263
3cafbd4e	264	return 0;
99f09beb DK	265	}
	266
	267	static int max8997_muic_handle_charger_type(struct max8997_muic_info *info,
	268	enum max8997_muic_charger_type charger_type)
	269	{
99f09beb DK	270	u8 adc;
	271	int ret;
	272
	273	ret = max8997_read_reg(info->muic, MAX8997_MUIC_REG_STATUS1, &adc);
	274	if (ret) {
	275	dev_err(info->dev, "failed to read muic register\n");
	276	goto out;
	277	}
	278
	279	switch (charger_type) {
	280	case MAX8997_CHARGER_TYPE_NONE:
b76668ba	281	ret = max8997_muic_handle_charger_type_detach(info);
99f09beb DK	282	break;
	283	case MAX8997_CHARGER_TYPE_USB:
	284	if ((adc & STATUS1_ADC_MASK) == MAX8997_ADC_OPEN) {
	285	max8997_muic_handle_usb(info,
	286	MAX8997_USB_DEVICE, true);
	287	}
99f09beb DK	288	break;
99f09beb DK	289	case MAX8997_CHARGER_TYPE_DOWNSTREAM_PORT:
b76668ba CC	290	extcon_set_cable_state(info->edev, "Charge-downstream", true);
b76668ba CC	291	break;
99f09beb	292	case MAX8997_CHARGER_TYPE_DEDICATED_CHG:
b76668ba CC	293	extcon_set_cable_state(info->edev, "TA", true);
b76668ba CC	294	break;
99f09beb	295	case MAX8997_CHARGER_TYPE_500MA:
b76668ba CC	296	extcon_set_cable_state(info->edev, "Slow-charger", true);
b76668ba CC	297	break;
99f09beb	298	case MAX8997_CHARGER_TYPE_1A:
b76668ba	299	extcon_set_cable_state(info->edev, "Fast-charger", true);
99f09beb DK	300	break;
99f09beb DK	301	default:
b76668ba CC	302	ret = -EINVAL;
b76668ba CC	303	goto out;
99f09beb DK	304	}
	305
	306	info->pre_charger_type = charger_type;
	307	out:
	308	return ret;
	309	}
	310
	311	static void max8997_muic_irq_work(struct work_struct *work)
	312	{
	313	struct max8997_muic_info *info = container_of(work,
	314	struct max8997_muic_info, irq_work);
b76668ba	315	u8 status[2];
71e58782	316	u8 adc, chg_type;
dca1a71e CC	317	int irq_type = 0;
dca1a71e CC	318	int i, ret;
99f09beb DK	319
	320	mutex_lock(&info->mutex);
	321
	322	ret = max8997_bulk_read(info->muic, MAX8997_MUIC_REG_STATUS1,
b76668ba	323	2, status);
99f09beb DK	324	if (ret) {
	325	dev_err(info->dev, "failed to read muic register\n");
	326	mutex_unlock(&info->mutex);
	327	return;
	328	}
	329
	330	dev_dbg(info->dev, "%s: STATUS1:0x%x, 2:0x%x\n", __func__,
	331	status[0], status[1]);
	332
dca1a71e CC	333	for (i = 0 ; i < ARRAY_SIZE(muic_irqs) ; i++)
	334	if (info->irq == muic_irqs[i].virq)
	335	irq_type = muic_irqs[i].irq;
	336
99f09beb	337	switch (irq_type) {
99f09beb DK	338	case MAX8997_MUICIRQ_ADC:
	339	adc = status[0] & STATUS1_ADC_MASK;
	340	adc >>= STATUS1_ADC_SHIFT;
	341
	342	max8997_muic_handle_adc(info, adc);
99f09beb DK	343	break;
	344	case MAX8997_MUICIRQ_ChgTyp:
	345	chg_type = status[1] & STATUS2_CHGTYP_MASK;
	346	chg_type >>= STATUS2_CHGTYP_SHIFT;
	347
	348	max8997_muic_handle_charger_type(info, chg_type);
99f09beb DK	349	break;
99f09beb DK	350	default:
b76668ba CC	351	dev_info(info->dev, "misc interrupt: irq %d occurred\n",
b76668ba CC	352	irq_type);
99f09beb DK	353	break;
	354	}
	355
99f09beb DK	356	mutex_unlock(&info->mutex);
	357
	358	return;
	359	}
	360
	361	static irqreturn_t max8997_muic_irq_handler(int irq, void *data)
	362	{
	363	struct max8997_muic_info *info = data;
	364
	365	dev_dbg(info->dev, "irq:%d\n", irq);
	366	info->irq = irq;
	367
	368	schedule_work(&info->irq_work);
	369
	370	return IRQ_HANDLED;
	371	}
	372
	373	static void max8997_muic_detect_dev(struct max8997_muic_info *info)
	374	{
	375	int ret;
	376	u8 status[2], adc, chg_type;
	377
	378	ret = max8997_bulk_read(info->muic, MAX8997_MUIC_REG_STATUS1,
	379	2, status);
	380	if (ret) {
	381	dev_err(info->dev, "failed to read muic register\n");
	382	return;
	383	}
	384
	385	dev_info(info->dev, "STATUS1:0x%x, STATUS2:0x%x\n",
	386	status[0], status[1]);
	387
	388	adc = status[0] & STATUS1_ADC_MASK;
	389	adc >>= STATUS1_ADC_SHIFT;
	390
	391	chg_type = status[1] & STATUS2_CHGTYP_MASK;
	392	chg_type >>= STATUS2_CHGTYP_SHIFT;
	393
	394	max8997_muic_handle_adc(info, adc);
	395	max8997_muic_handle_charger_type(info, chg_type);
	396	}
	397
44f34fd4	398	static int max8997_muic_probe(struct platform_device *pdev)
99f09beb	399	{
b76668ba CC	400	struct max8997_dev *max8997 = dev_get_drvdata(pdev->dev.parent);
b76668ba CC	401	struct max8997_platform_data *pdata = dev_get_platdata(max8997->dev);
99f09beb DK	402	struct max8997_muic_info *info;
	403	int ret, i;
	404
0b672e9b SK	405	info = devm_kzalloc(&pdev->dev, sizeof(struct max8997_muic_info),
0b672e9b SK	406	GFP_KERNEL);
99f09beb DK	407	if (!info) {
99f09beb DK	408	dev_err(&pdev->dev, "failed to allocate memory\n");
0b672e9b	409	return -ENOMEM;
99f09beb DK	410	}
99f09beb DK	411
99f09beb	412	info->dev = &pdev->dev;
b76668ba	413	info->muic = max8997->muic;
99f09beb DK	414
	415	platform_set_drvdata(pdev, info);
	416	mutex_init(&info->mutex);
	417
99f09beb DK	418	INIT_WORK(&info->irq_work, max8997_muic_irq_work);
	419
	420	for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) {
	421	struct max8997_muic_irq *muic_irq = &muic_irqs[i];
68c9274d	422	unsigned int virq = 0;
dca1a71e CC	423
dca1a71e CC	424	virq = irq_create_mapping(max8997->irq_domain, muic_irq->irq);
68c9274d SK	425	if (!virq) {
68c9274d SK	426	ret = -EINVAL;
dca1a71e	427	goto err_irq;
68c9274d	428	}
dca1a71e	429	muic_irq->virq = virq;
99f09beb	430
ae3b3215 CC	431	ret = request_threaded_irq(virq, NULL,
	432	max8997_muic_irq_handler,
	433	IRQF_NO_SUSPEND,
	434	muic_irq->name, info);
99f09beb DK	435	if (ret) {
	436	dev_err(&pdev->dev,
	437	"failed: irq request (IRQ: %d,"
	438	" error :%d)\n",
	439	muic_irq->irq, ret);
99f09beb DK	440	goto err_irq;
	441	}
	442	}
	443
b76668ba	444	/* External connector */
0b672e9b SK	445	info->edev = devm_kzalloc(&pdev->dev, sizeof(struct extcon_dev),
0b672e9b SK	446	GFP_KERNEL);
b76668ba CC	447	if (!info->edev) {
	448	dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
	449	ret = -ENOMEM;
	450	goto err_irq;
	451	}
	452	info->edev->name = DEV_NAME;
	453	info->edev->supported_cable = max8997_extcon_cable;
	454	ret = extcon_dev_register(info->edev, NULL);
	455	if (ret) {
	456	dev_err(&pdev->dev, "failed to register extcon device\n");
0b672e9b	457	goto err_irq;
b76668ba CC	458	}
b76668ba CC	459
99f09beb	460	/* Initialize registers according to platform data */
b76668ba CC	461	if (pdata->muic_pdata) {
	462	struct max8997_muic_platform_data *mdata = info->muic_pdata;
	463
	464	for (i = 0; i < mdata->num_init_data; i++) {
	465	max8997_write_reg(info->muic, mdata->init_data[i].addr,
	466	mdata->init_data[i].data);
	467	}
	468	}
99f09beb DK	469
	470	/* Initial device detection */
	471	max8997_muic_detect_dev(info);
	472
	473	return ret;
	474
	475	err_irq:
3241d56e	476	while (--i >= 0)
dca1a71e	477	free_irq(muic_irqs[i].virq, info);
99f09beb DK	478	return ret;
	479	}
	480
93ed0327	481	static int max8997_muic_remove(struct platform_device *pdev)
99f09beb DK	482	{
99f09beb DK	483	struct max8997_muic_info *info = platform_get_drvdata(pdev);
99f09beb DK	484	int i;
99f09beb DK	485
99f09beb	486	for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
dca1a71e	487	free_irq(muic_irqs[i].virq, info);
71e58782	488	cancel_work_sync(&info->irq_work);
99f09beb	489
b76668ba CC	490	extcon_dev_unregister(info->edev);
b76668ba CC	491
99f09beb DK	492	return 0;
	493	}
	494
	495	static struct platform_driver max8997_muic_driver = {
	496	.driver = {
b76668ba	497	.name = DEV_NAME,
99f09beb DK	498	.owner = THIS_MODULE,
	499	},
	500	.probe = max8997_muic_probe,
5f7e2228	501	.remove = max8997_muic_remove,
99f09beb DK	502	};
99f09beb DK	503
b00e126f	504	module_platform_driver(max8997_muic_driver);
99f09beb	505
b76668ba	506	MODULE_DESCRIPTION("Maxim MAX8997 Extcon driver");
99f09beb DK	507	MODULE_AUTHOR("Donggeun Kim <dg77.kim@samsung.com>");
99f09beb DK	508	MODULE_LICENSE("GPL");