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

/*
 * max8997-muic.c - MAX8997 muic driver for the Maxim 8997
 *
 *  Copyright (C) 2011 Samsung Electrnoics
 *  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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

#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>

/* MAX8997-MUIC STATUS1 register */
#define STATUS1_ADC_SHIFT		0
#define STATUS1_ADCLOW_SHIFT		5
#define STATUS1_ADCERR_SHIFT		6
#define STATUS1_ADC_MASK		(0x1f << STATUS1_ADC_SHIFT)
#define STATUS1_ADCLOW_MASK		(0x1 << STATUS1_ADCLOW_SHIFT)
#define STATUS1_ADCERR_MASK		(0x1 << STATUS1_ADCERR_SHIFT)

/* MAX8997-MUIC STATUS2 register */
#define STATUS2_CHGTYP_SHIFT		0
#define STATUS2_CHGDETRUN_SHIFT		3
#define STATUS2_DCDTMR_SHIFT		4
#define STATUS2_DBCHG_SHIFT		5
#define STATUS2_VBVOLT_SHIFT		6
#define STATUS2_CHGTYP_MASK		(0x7 << STATUS2_CHGTYP_SHIFT)
#define STATUS2_CHGDETRUN_MASK		(0x1 << STATUS2_CHGDETRUN_SHIFT)
#define STATUS2_DCDTMR_MASK		(0x1 << STATUS2_DCDTMR_SHIFT)
#define STATUS2_DBCHG_MASK		(0x1 << STATUS2_DBCHG_SHIFT)
#define STATUS2_VBVOLT_MASK		(0x1 << STATUS2_VBVOLT_SHIFT)

/* MAX8997-MUIC STATUS3 register */
#define STATUS3_OVP_SHIFT		2
#define STATUS3_OVP_MASK		(0x1 << STATUS3_OVP_SHIFT)

/* MAX8997-MUIC CONTROL1 register */
#define COMN1SW_SHIFT			0
#define COMP2SW_SHIFT			3
#define COMN1SW_MASK			(0x7 << COMN1SW_SHIFT)
#define COMP2SW_MASK			(0x7 << COMP2SW_SHIFT)
#define SW_MASK				(COMP2SW_MASK | COMN1SW_MASK)

#define MAX8997_SW_USB		((1 << COMP2SW_SHIFT) | (1 << COMN1SW_SHIFT))
#define MAX8997_SW_AUDIO	((2 << COMP2SW_SHIFT) | (2 << COMN1SW_SHIFT))
#define MAX8997_SW_UART		((3 << COMP2SW_SHIFT) | (3 << COMN1SW_SHIFT))
#define MAX8997_SW_OPEN		((0 << COMP2SW_SHIFT) | (0 << COMN1SW_SHIFT))

#define	MAX8997_ADC_GROUND		0x00
#define	MAX8997_ADC_MHL			0x01
#define	MAX8997_ADC_JIG_USB_1		0x18
#define	MAX8997_ADC_JIG_USB_2		0x19
#define	MAX8997_ADC_DESKDOCK		0x1a
#define	MAX8997_ADC_JIG_UART		0x1c
#define	MAX8997_ADC_CARDOCK		0x1d
#define	MAX8997_ADC_OPEN		0x1f

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

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 max8997_dev *iodev;
	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;
};

static int max8997_muic_handle_usb(struct max8997_muic_info *info,
			enum max8997_muic_usb_type usb_type, bool attached)
{
	struct max8997_muic_platform_data *mdata = info->muic_pdata;
	int ret = 0;

	if (usb_type == MAX8997_USB_HOST) {
		/* switch to USB */
		ret = max8997_update_reg(info->muic, MAX8997_MUIC_REG_CONTROL1,
				attached ? MAX8997_SW_USB : MAX8997_SW_OPEN,
				SW_MASK);
		if (ret) {
			dev_err(info->dev, "failed to update muic register\n");
			goto out;
		}
	}

	if (mdata->usb_callback)
		mdata->usb_callback(usb_type, attached);
out:
	return ret;
}

static void max8997_muic_handle_mhl(struct max8997_muic_info *info,
			bool attached)
{
	struct max8997_muic_platform_data *mdata = info->muic_pdata;

	if (mdata->mhl_callback)
		mdata->mhl_callback(attached);
}

static int max8997_muic_handle_dock(struct max8997_muic_info *info,
			int adc, bool attached)
{
	struct max8997_muic_platform_data *mdata = info->muic_pdata;
	int ret = 0;

	/* switch to AUDIO */
	ret = max8997_update_reg(info->muic, MAX8997_MUIC_REG_CONTROL1,
				attached ? MAX8997_SW_AUDIO : MAX8997_SW_OPEN,
				SW_MASK);
	if (ret) {
		dev_err(info->dev, "failed to update muic register\n");
		goto out;
	}

	switch (adc) {
	case MAX8997_ADC_DESKDOCK:
		if (mdata->deskdock_callback)
			mdata->deskdock_callback(attached);
		break;
	case MAX8997_ADC_CARDOCK:
		if (mdata->cardock_callback)
			mdata->cardock_callback(attached);
		break;
	default:
		break;
	}
out:
	return ret;
}

static int max8997_muic_handle_jig_uart(struct max8997_muic_info *info,
			bool attached)
{
	struct max8997_muic_platform_data *mdata = info->muic_pdata;
	int ret = 0;

	/* switch to UART */
	ret = max8997_update_reg(info->muic, MAX8997_MUIC_REG_CONTROL1,
				attached ? MAX8997_SW_UART : MAX8997_SW_OPEN,
				SW_MASK);
	if (ret) {
		dev_err(info->dev, "failed to update muic register\n");
		goto out;
	}

	if (mdata->uart_callback)
		mdata->uart_callback(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:
		max8997_muic_handle_mhl(info, 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:
		max8997_muic_handle_mhl(info, 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:
		break;
	}

	info->pre_adc = adc;

	return ret;
}

static int max8997_muic_handle_charger_type(struct max8997_muic_info *info,
				enum max8997_muic_charger_type charger_type)
{
	struct max8997_muic_platform_data *mdata = info->muic_pdata;
	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:
		if (mdata->charger_callback)
			mdata->charger_callback(false, charger_type);
		if (info->pre_charger_type == MAX8997_CHARGER_TYPE_USB) {
			max8997_muic_handle_usb(info,
					MAX8997_USB_DEVICE, false);
		}
		break;
	case MAX8997_CHARGER_TYPE_USB:
		if ((adc & STATUS1_ADC_MASK) == MAX8997_ADC_OPEN) {
			max8997_muic_handle_usb(info,
					MAX8997_USB_DEVICE, true);
		}
		if (mdata->charger_callback)
			mdata->charger_callback(true, charger_type);
		break;
	case MAX8997_CHARGER_TYPE_DOWNSTREAM_PORT:
	case MAX8997_CHARGER_TYPE_DEDICATED_CHG:
	case MAX8997_CHARGER_TYPE_500MA:
	case MAX8997_CHARGER_TYPE_1A:
		if (mdata->charger_callback)
			mdata->charger_callback(true, charger_type);
		break;
	default:
		break;
	}

	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);
	struct max8997_platform_data *pdata =
				dev_get_platdata(info->iodev->dev);
	u8 status[3];
	u8 adc, chg_type;

	int irq_type = info->irq - pdata->irq_base;
	int ret;

	mutex_lock(&info->mutex);

	ret = max8997_bulk_read(info->muic, MAX8997_MUIC_REG_STATUS1,
				3, 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]);

	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: %s occurred\n",
			 muic_irqs[irq_type].name);
		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 void max8997_initialize_device(struct max8997_muic_info *info)
{
	struct max8997_muic_platform_data *mdata = info->muic_pdata;
	int i;

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

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

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

	if (!pdata->muic_pdata) {
		dev_err(&pdev->dev, "failed to get platform_data\n");
		ret = -EINVAL;
		goto err_pdata;
	}
	info->muic_pdata = pdata->muic_pdata;

	info->dev = &pdev->dev;
	info->iodev = iodev;
	info->muic = iodev->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];

		ret = request_threaded_irq(pdata->irq_base + muic_irq->irq,
				NULL, max8997_muic_irq_handler,
				0, muic_irq->name,
				info);
		if (ret) {
			dev_err(&pdev->dev,
				"failed: irq request (IRQ: %d,"
				" error :%d)\n",
				muic_irq->irq, ret);

			for (i = i - 1; i >= 0; i--)
				free_irq(muic_irq->irq, info);

			goto err_irq;
		}
	}

	/* Initialize registers according to platform data */
	max8997_initialize_device(info);

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

	return ret;

err_irq:
err_pdata:
	kfree(info);
err_kfree:
	return ret;
}

static int __devexit max8997_muic_remove(struct platform_device *pdev)
{
	struct max8997_muic_info *info = platform_get_drvdata(pdev);
	struct max8997_platform_data *pdata =
				dev_get_platdata(info->iodev->dev);
	int i;

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

	kfree(info);

	return 0;
}

static struct platform_driver max8997_muic_driver = {
	.driver		= {
		.name	= "max8997-muic",
		.owner	= THIS_MODULE,
	},
	.probe		= max8997_muic_probe,
	.remove		= __devexit_p(max8997_muic_remove),
};

module_platform_driver(max8997_muic_driver);

MODULE_DESCRIPTION("Maxim MAX8997 MUIC driver");
MODULE_AUTHOR("Donggeun Kim <dg77.kim@samsung.com>");
MODULE_LICENSE("GPL");
Commit	Line	Data
99f09beb DK	1	/*
	2	* max8997-muic.c - MAX8997 muic driver for the Maxim 8997
	3	*
	4	* Copyright (C) 2011 Samsung Electrnoics
	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.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program; if not, write to the Free Software
	19	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	20	*
	21	*/
	22
	23	#include <linux/kernel.h>
	24	#include <linux/module.h>
	25	#include <linux/i2c.h>
	26	#include <linux/slab.h>
	27	#include <linux/interrupt.h>
	28	#include <linux/err.h>
	29	#include <linux/platform_device.h>
	30	#include <linux/kobject.h>
	31	#include <linux/mfd/max8997.h>
	32	#include <linux/mfd/max8997-private.h>
	33
	34	/* MAX8997-MUIC STATUS1 register */
	35	#define STATUS1_ADC_SHIFT 0
	36	#define STATUS1_ADCLOW_SHIFT 5
	37	#define STATUS1_ADCERR_SHIFT 6
	38	#define STATUS1_ADC_MASK (0x1f << STATUS1_ADC_SHIFT)
	39	#define STATUS1_ADCLOW_MASK (0x1 << STATUS1_ADCLOW_SHIFT)
	40	#define STATUS1_ADCERR_MASK (0x1 << STATUS1_ADCERR_SHIFT)
	41
	42	/* MAX8997-MUIC STATUS2 register */
	43	#define STATUS2_CHGTYP_SHIFT 0
	44	#define STATUS2_CHGDETRUN_SHIFT 3
	45	#define STATUS2_DCDTMR_SHIFT 4
	46	#define STATUS2_DBCHG_SHIFT 5
	47	#define STATUS2_VBVOLT_SHIFT 6
	48	#define STATUS2_CHGTYP_MASK (0x7 << STATUS2_CHGTYP_SHIFT)
	49	#define STATUS2_CHGDETRUN_MASK (0x1 << STATUS2_CHGDETRUN_SHIFT)
	50	#define STATUS2_DCDTMR_MASK (0x1 << STATUS2_DCDTMR_SHIFT)
	51	#define STATUS2_DBCHG_MASK (0x1 << STATUS2_DBCHG_SHIFT)
	52	#define STATUS2_VBVOLT_MASK (0x1 << STATUS2_VBVOLT_SHIFT)
	53
	54	/* MAX8997-MUIC STATUS3 register */
	55	#define STATUS3_OVP_SHIFT 2
	56	#define STATUS3_OVP_MASK (0x1 << STATUS3_OVP_SHIFT)
	57
	58	/* MAX8997-MUIC CONTROL1 register */
	59	#define COMN1SW_SHIFT 0
	60	#define COMP2SW_SHIFT 3
	61	#define COMN1SW_MASK (0x7 << COMN1SW_SHIFT)
	62	#define COMP2SW_MASK (0x7 << COMP2SW_SHIFT)
	63	#define SW_MASK (COMP2SW_MASK \| COMN1SW_MASK)
	64
65	#define MAX8997_SW_USB ((1 << COMP2SW_SHIFT) \| (1 << COMN1SW_SHIFT))
66	#define MAX8997_SW_AUDIO ((2 << COMP2SW_SHIFT) \| (2 << COMN1SW_SHIFT))
67	#define MAX8997_SW_UART ((3 << COMP2SW_SHIFT) \| (3 << COMN1SW_SHIFT))
68	#define MAX8997_SW_OPEN ((0 << COMP2SW_SHIFT) \| (0 << COMN1SW_SHIFT))
69
70	#define MAX8997_ADC_GROUND 0x00
71	#define MAX8997_ADC_MHL 0x01
72	#define MAX8997_ADC_JIG_USB_1 0x18
73	#define MAX8997_ADC_JIG_USB_2 0x19
74	#define MAX8997_ADC_DESKDOCK 0x1a
75	#define MAX8997_ADC_JIG_UART 0x1c
76	#define MAX8997_ADC_CARDOCK 0x1d
77	#define MAX8997_ADC_OPEN 0x1f
78
79	struct max8997_muic_irq {
80	unsigned int irq;
81	const char *name;
82	};
83
84	static struct max8997_muic_irq muic_irqs[] = {
85	{ MAX8997_MUICIRQ_ADCError, "muic-ADC_error" },
86	{ MAX8997_MUICIRQ_ADCLow, "muic-ADC_low" },
87	{ MAX8997_MUICIRQ_ADC, "muic-ADC" },
88	{ MAX8997_MUICIRQ_VBVolt, "muic-VB_voltage" },
89	{ MAX8997_MUICIRQ_DBChg, "muic-DB_charger" },
90	{ MAX8997_MUICIRQ_DCDTmr, "muic-DCD_timer" },
91	{ MAX8997_MUICIRQ_ChgDetRun, "muic-CDR_status" },
92	{ MAX8997_MUICIRQ_ChgTyp, "muic-charger_type" },
93	{ MAX8997_MUICIRQ_OVP, "muic-over_voltage" },
94	};
95
96	struct max8997_muic_info {
97	struct device *dev;
98	struct max8997_dev *iodev;
99	struct i2c_client *muic;
100	struct max8997_muic_platform_data *muic_pdata;
101
102	int irq;
103	struct work_struct irq_work;
104
105	enum max8997_muic_charger_type pre_charger_type;
106	int pre_adc;
107
108	struct mutex mutex;
109	};
110
111	static int max8997_muic_handle_usb(struct max8997_muic_info *info,
112	enum max8997_muic_usb_type usb_type, bool attached)
113	{
114	struct max8997_muic_platform_data *mdata = info->muic_pdata;
115	int ret = 0;
116
117	if (usb_type == MAX8997_USB_HOST) {
118	/* switch to USB */
119	ret = max8997_update_reg(info->muic, MAX8997_MUIC_REG_CONTROL1,
120	attached ? MAX8997_SW_USB : MAX8997_SW_OPEN,
121	SW_MASK);
122	if (ret) {
123	dev_err(info->dev, "failed to update muic register\n");
124	goto out;
125	}
126	}
127
128	if (mdata->usb_callback)
129	mdata->usb_callback(usb_type, attached);
130	out:
131	return ret;
132	}
133
134	static void max8997_muic_handle_mhl(struct max8997_muic_info *info,
135	bool attached)
136	{
137	struct max8997_muic_platform_data *mdata = info->muic_pdata;
138
139	if (mdata->mhl_callback)
140	mdata->mhl_callback(attached);
141	}
142
143	static int max8997_muic_handle_dock(struct max8997_muic_info *info,
144	int adc, bool attached)
145	{
146	struct max8997_muic_platform_data *mdata = info->muic_pdata;
147	int ret = 0;
148
149	/* switch to AUDIO */
150	ret = max8997_update_reg(info->muic, MAX8997_MUIC_REG_CONTROL1,
151	attached ? MAX8997_SW_AUDIO : MAX8997_SW_OPEN,
152	SW_MASK);
153	if (ret) {
154	dev_err(info->dev, "failed to update muic register\n");
155	goto out;
156	}
157
158	switch (adc) {
159	case MAX8997_ADC_DESKDOCK:
160	if (mdata->deskdock_callback)
161	mdata->deskdock_callback(attached);
162	break;
163	case MAX8997_ADC_CARDOCK:
164	if (mdata->cardock_callback)
165	mdata->cardock_callback(attached);
166	break;
167	default:
168	break;
169	}
170	out:
171	return ret;
172	}
173
174	static int max8997_muic_handle_jig_uart(struct max8997_muic_info *info,
175	bool attached)
176	{
177	struct max8997_muic_platform_data *mdata = info->muic_pdata;
178	int ret = 0;
179
180	/* switch to UART */
181	ret = max8997_update_reg(info->muic, MAX8997_MUIC_REG_CONTROL1,
182	attached ? MAX8997_SW_UART : MAX8997_SW_OPEN,
183	SW_MASK);
184	if (ret) {
185	dev_err(info->dev, "failed to update muic register\n");
186	goto out;
187	}
188
189	if (mdata->uart_callback)
190	mdata->uart_callback(attached);
191	out:
192	return ret;
193	}
194
195	static int max8997_muic_handle_adc_detach(struct max8997_muic_info *info)
196	{
197	int ret = 0;
198
199	switch (info->pre_adc) {
200	case MAX8997_ADC_GROUND:
201	ret = max8997_muic_handle_usb(info, MAX8997_USB_HOST, false);
202	break;
203	case MAX8997_ADC_MHL:
204	max8997_muic_handle_mhl(info, false);
205	break;
206	case MAX8997_ADC_JIG_USB_1:
207	case MAX8997_ADC_JIG_USB_2:
208	ret = max8997_muic_handle_usb(info, MAX8997_USB_DEVICE, false);
209	break;
210	case MAX8997_ADC_DESKDOCK:
211	case MAX8997_ADC_CARDOCK:
212	ret = max8997_muic_handle_dock(info, info->pre_adc, false);
213	break;
214	case MAX8997_ADC_JIG_UART:
215	ret = max8997_muic_handle_jig_uart(info, false);
216	break;
217	default:
218	break;
219	}
220
221	return ret;
222	}
223
224	static int max8997_muic_handle_adc(struct max8997_muic_info *info, int adc)
225	{
226	int ret = 0;
227
228	switch (adc) {
229	case MAX8997_ADC_GROUND:
230	ret = max8997_muic_handle_usb(info, MAX8997_USB_HOST, true);
231	break;
232	case MAX8997_ADC_MHL:
233	max8997_muic_handle_mhl(info, true);
234	break;
235	case MAX8997_ADC_JIG_USB_1:
236	case MAX8997_ADC_JIG_USB_2:
237	ret = max8997_muic_handle_usb(info, MAX8997_USB_DEVICE, true);
238	break;
239	case MAX8997_ADC_DESKDOCK:
240	case MAX8997_ADC_CARDOCK:
241	ret = max8997_muic_handle_dock(info, adc, true);
242	break;
243	case MAX8997_ADC_JIG_UART:
244	ret = max8997_muic_handle_jig_uart(info, true);
245	break;
246	case MAX8997_ADC_OPEN:
247	ret = max8997_muic_handle_adc_detach(info);
248	break;
249	default:
250	break;
251	}
252
253	info->pre_adc = adc;
254
255	return ret;
256	}
257
258	static int max8997_muic_handle_charger_type(struct max8997_muic_info *info,
259	enum max8997_muic_charger_type charger_type)
260	{
261	struct max8997_muic_platform_data *mdata = info->muic_pdata;
262	u8 adc;
263	int ret;
264
265	ret = max8997_read_reg(info->muic, MAX8997_MUIC_REG_STATUS1, &adc);
266	if (ret) {
267	dev_err(info->dev, "failed to read muic register\n");
268	goto out;
269	}
270
271	switch (charger_type) {
272	case MAX8997_CHARGER_TYPE_NONE:
273	if (mdata->charger_callback)
274	mdata->charger_callback(false, charger_type);
275	if (info->pre_charger_type == MAX8997_CHARGER_TYPE_USB) {
276	max8997_muic_handle_usb(info,
277	MAX8997_USB_DEVICE, false);
278	}
279	break;
280	case MAX8997_CHARGER_TYPE_USB:
281	if ((adc & STATUS1_ADC_MASK) == MAX8997_ADC_OPEN) {
282	max8997_muic_handle_usb(info,
283	MAX8997_USB_DEVICE, true);
284	}
285	if (mdata->charger_callback)
286	mdata->charger_callback(true, charger_type);
287	break;
288	case MAX8997_CHARGER_TYPE_DOWNSTREAM_PORT:
289	case MAX8997_CHARGER_TYPE_DEDICATED_CHG:
290	case MAX8997_CHARGER_TYPE_500MA:
291	case MAX8997_CHARGER_TYPE_1A:
292	if (mdata->charger_callback)
293	mdata->charger_callback(true, charger_type);
294	break;
295	default:
296	break;
297	}
298
299	info->pre_charger_type = charger_type;
300	out:
301	return ret;
302	}
303
304	static void max8997_muic_irq_work(struct work_struct *work)
305	{
306	struct max8997_muic_info *info = container_of(work,
307	struct max8997_muic_info, irq_work);
308	struct max8997_platform_data *pdata =
309	dev_get_platdata(info->iodev->dev);
99f09beb	310	u8 status[3];
71e58782	311	u8 adc, chg_type;
99f09beb DK	312
	313	int irq_type = info->irq - pdata->irq_base;
	314	int ret;
	315
	316	mutex_lock(&info->mutex);
	317
	318	ret = max8997_bulk_read(info->muic, MAX8997_MUIC_REG_STATUS1,
	319	3, status);
	320	if (ret) {
	321	dev_err(info->dev, "failed to read muic register\n");
	322	mutex_unlock(&info->mutex);
	323	return;
	324	}
	325
	326	dev_dbg(info->dev, "%s: STATUS1:0x%x, 2:0x%x\n", __func__,
	327	status[0], status[1]);
	328
	329	switch (irq_type) {
99f09beb DK	330	case MAX8997_MUICIRQ_ADC:
	331	adc = status[0] & STATUS1_ADC_MASK;
	332	adc >>= STATUS1_ADC_SHIFT;
	333
	334	max8997_muic_handle_adc(info, adc);
99f09beb DK	335	break;
	336	case MAX8997_MUICIRQ_ChgTyp:
	337	chg_type = status[1] & STATUS2_CHGTYP_MASK;
	338	chg_type >>= STATUS2_CHGTYP_SHIFT;
	339
	340	max8997_muic_handle_charger_type(info, chg_type);
99f09beb DK	341	break;
99f09beb DK	342	default:
71e58782 DK	343	dev_info(info->dev, "misc interrupt: %s occurred\n",
71e58782 DK	344	muic_irqs[irq_type].name);
99f09beb DK	345	break;
	346	}
	347
99f09beb DK	348	mutex_unlock(&info->mutex);
	349
	350	return;
	351	}
	352
	353	static irqreturn_t max8997_muic_irq_handler(int irq, void *data)
	354	{
	355	struct max8997_muic_info *info = data;
	356
	357	dev_dbg(info->dev, "irq:%d\n", irq);
	358	info->irq = irq;
	359
	360	schedule_work(&info->irq_work);
	361
	362	return IRQ_HANDLED;
	363	}
	364
	365	static void max8997_muic_detect_dev(struct max8997_muic_info *info)
	366	{
	367	int ret;
	368	u8 status[2], adc, chg_type;
	369
	370	ret = max8997_bulk_read(info->muic, MAX8997_MUIC_REG_STATUS1,
	371	2, status);
	372	if (ret) {
	373	dev_err(info->dev, "failed to read muic register\n");
	374	return;
	375	}
	376
	377	dev_info(info->dev, "STATUS1:0x%x, STATUS2:0x%x\n",
	378	status[0], status[1]);
	379
	380	adc = status[0] & STATUS1_ADC_MASK;
	381	adc >>= STATUS1_ADC_SHIFT;
	382
	383	chg_type = status[1] & STATUS2_CHGTYP_MASK;
	384	chg_type >>= STATUS2_CHGTYP_SHIFT;
	385
	386	max8997_muic_handle_adc(info, adc);
	387	max8997_muic_handle_charger_type(info, chg_type);
	388	}
	389
99f09beb DK	390	static void max8997_initialize_device(struct max8997_muic_info *info)
	391	{
	392	struct max8997_muic_platform_data *mdata = info->muic_pdata;
	393	int i;
	394
	395	for (i = 0; i < mdata->num_init_data; i++) {
	396	max8997_write_reg(info->muic, mdata->init_data[i].addr,
	397	mdata->init_data[i].data);
	398	}
	399	}
	400
	401	static int __devinit max8997_muic_probe(struct platform_device *pdev)
	402	{
	403	struct max8997_dev *iodev = dev_get_drvdata(pdev->dev.parent);
	404	struct max8997_platform_data *pdata = dev_get_platdata(iodev->dev);
	405	struct max8997_muic_info *info;
	406	int ret, i;
	407
	408	info = kzalloc(sizeof(struct max8997_muic_info), GFP_KERNEL);
	409	if (!info) {
	410	dev_err(&pdev->dev, "failed to allocate memory\n");
	411	ret = -ENOMEM;
	412	goto err_kfree;
	413	}
	414
	415	if (!pdata->muic_pdata) {
	416	dev_err(&pdev->dev, "failed to get platform_data\n");
	417	ret = -EINVAL;
	418	goto err_pdata;
	419	}
	420	info->muic_pdata = pdata->muic_pdata;
	421
	422	info->dev = &pdev->dev;
	423	info->iodev = iodev;
	424	info->muic = iodev->muic;
	425
	426	platform_set_drvdata(pdev, info);
	427	mutex_init(&info->mutex);
	428
99f09beb DK	429	INIT_WORK(&info->irq_work, max8997_muic_irq_work);
	430
	431	for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) {
	432	struct max8997_muic_irq *muic_irq = &muic_irqs[i];
	433
	434	ret = request_threaded_irq(pdata->irq_base + muic_irq->irq,
	435	NULL, max8997_muic_irq_handler,
	436	0, muic_irq->name,
	437	info);
	438	if (ret) {
	439	dev_err(&pdev->dev,
	440	"failed: irq request (IRQ: %d,"
	441	" error :%d)\n",
	442	muic_irq->irq, ret);
	443
	444	for (i = i - 1; i >= 0; i--)
	445	free_irq(muic_irq->irq, info);
	446
	447	goto err_irq;
	448	}
	449	}
	450
	451	/* Initialize registers according to platform data */
	452	max8997_initialize_device(info);
	453
	454	/* Initial device detection */
	455	max8997_muic_detect_dev(info);
	456
	457	return ret;
	458
	459	err_irq:
99f09beb DK	460	err_pdata:
	461	kfree(info);
	462	err_kfree:
	463	return ret;
	464	}
	465
	466	static int __devexit max8997_muic_remove(struct platform_device *pdev)
	467	{
	468	struct max8997_muic_info *info = platform_get_drvdata(pdev);
	469	struct max8997_platform_data *pdata =
	470	dev_get_platdata(info->iodev->dev);
	471	int i;
	472
99f09beb DK	473	for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
99f09beb DK	474	free_irq(pdata->irq_base + muic_irqs[i].irq, info);
71e58782	475	cancel_work_sync(&info->irq_work);
99f09beb DK	476
	477	kfree(info);
	478
	479	return 0;
	480	}
	481
	482	static struct platform_driver max8997_muic_driver = {
	483	.driver = {
	484	.name = "max8997-muic",
	485	.owner = THIS_MODULE,
	486	},
	487	.probe = max8997_muic_probe,
	488	.remove = __devexit_p(max8997_muic_remove),
	489	};
	490
b00e126f	491	module_platform_driver(max8997_muic_driver);
99f09beb DK	492
	493	MODULE_DESCRIPTION("Maxim MAX8997 MUIC driver");
	494	MODULE_AUTHOR("Donggeun Kim <dg77.kim@samsung.com>");
	495	MODULE_LICENSE("GPL");