[deliverable/linux.git] / drivers / input / keyboard / omap4-keypad.c

/*
 * OMAP4 Keypad Driver
 *
 * Copyright (C) 2010 Texas Instruments
 *
 * Author: Abraham Arce <x0066660@ti.com>
 * Initial Code: Syed Rafiuddin <rafiuddin.syed@ti.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/module.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/errno.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/input.h>
#include <linux/slab.h>
#include <linux/pm_runtime.h>

#include <linux/platform_data/omap4-keypad.h>

/* OMAP4 registers */
#define OMAP4_KBD_REVISION		0x00
#define OMAP4_KBD_SYSCONFIG		0x10
#define OMAP4_KBD_SYSSTATUS		0x14
#define OMAP4_KBD_IRQSTATUS		0x18
#define OMAP4_KBD_IRQENABLE		0x1C
#define OMAP4_KBD_WAKEUPENABLE		0x20
#define OMAP4_KBD_PENDING		0x24
#define OMAP4_KBD_CTRL			0x28
#define OMAP4_KBD_DEBOUNCINGTIME	0x2C
#define OMAP4_KBD_LONGKEYTIME		0x30
#define OMAP4_KBD_TIMEOUT		0x34
#define OMAP4_KBD_STATEMACHINE		0x38
#define OMAP4_KBD_ROWINPUTS		0x3C
#define OMAP4_KBD_COLUMNOUTPUTS		0x40
#define OMAP4_KBD_FULLCODE31_0		0x44
#define OMAP4_KBD_FULLCODE63_32		0x48

/* OMAP4 bit definitions */
#define OMAP4_DEF_IRQENABLE_EVENTEN	(1 << 0)
#define OMAP4_DEF_IRQENABLE_LONGKEY	(1 << 1)
#define OMAP4_DEF_IRQENABLE_TIMEOUTEN	(1 << 2)
#define OMAP4_DEF_WUP_EVENT_ENA		(1 << 0)
#define OMAP4_DEF_WUP_LONG_KEY_ENA	(1 << 1)
#define OMAP4_DEF_CTRL_NOSOFTMODE	(1 << 1)
#define OMAP4_DEF_CTRLPTVVALUE		(1 << 2)
#define OMAP4_DEF_CTRLPTV		(1 << 1)

/* OMAP4 values */
#define OMAP4_VAL_IRQDISABLE		0x00
#define OMAP4_VAL_DEBOUNCINGTIME	0x07
#define OMAP4_VAL_FUNCTIONALCFG		0x1E

#define OMAP4_MASK_IRQSTATUSDISABLE	0xFFFF

enum {
	KBD_REVISION_OMAP4 = 0,
	KBD_REVISION_OMAP5,
};

struct omap4_keypad {
	struct input_dev *input;

	void __iomem *base;
	unsigned int irq;

	unsigned int rows;
	unsigned int cols;
	u32 reg_offset;
	u32 irqreg_offset;
	unsigned int row_shift;
	bool no_autorepeat;
	unsigned char key_state[8];
	unsigned short *keymap;
};

static int kbd_readl(struct omap4_keypad *keypad_data, u32 offset)
{
	return __raw_readl(keypad_data->base +
				keypad_data->reg_offset + offset);
}

static void kbd_writel(struct omap4_keypad *keypad_data, u32 offset, u32 value)
{
	__raw_writel(value,
		     keypad_data->base + keypad_data->reg_offset + offset);
}

static int kbd_read_irqreg(struct omap4_keypad *keypad_data, u32 offset)
{
	return __raw_readl(keypad_data->base +
				keypad_data->irqreg_offset + offset);
}

static void kbd_write_irqreg(struct omap4_keypad *keypad_data,
			     u32 offset, u32 value)
{
	__raw_writel(value,
		     keypad_data->base + keypad_data->irqreg_offset + offset);
}


/* Interrupt handler */
static irqreturn_t omap4_keypad_interrupt(int irq, void *dev_id)
{
	struct omap4_keypad *keypad_data = dev_id;
	struct input_dev *input_dev = keypad_data->input;
	unsigned char key_state[ARRAY_SIZE(keypad_data->key_state)];
	unsigned int col, row, code, changed;
	u32 *new_state = (u32 *) key_state;

	/* Disable interrupts */
	kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQENABLE,
			 OMAP4_VAL_IRQDISABLE);

	*new_state = kbd_readl(keypad_data, OMAP4_KBD_FULLCODE31_0);
	*(new_state + 1) = kbd_readl(keypad_data, OMAP4_KBD_FULLCODE63_32);

	for (row = 0; row < keypad_data->rows; row++) {
		changed = key_state[row] ^ keypad_data->key_state[row];
		if (!changed)
			continue;

		for (col = 0; col < keypad_data->cols; col++) {
			if (changed & (1 << col)) {
				code = MATRIX_SCAN_CODE(row, col,
						keypad_data->row_shift);
				input_event(input_dev, EV_MSC, MSC_SCAN, code);
				input_report_key(input_dev,
						 keypad_data->keymap[code],
						 key_state[row] & (1 << col));
			}
		}
	}

	input_sync(input_dev);

	memcpy(keypad_data->key_state, key_state,
		sizeof(keypad_data->key_state));

	/* clear pending interrupts */
	kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS,
			 kbd_read_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS));

	/* enable interrupts */
	kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQENABLE,
		OMAP4_DEF_IRQENABLE_EVENTEN |
				OMAP4_DEF_IRQENABLE_LONGKEY);

	return IRQ_HANDLED;
}

static int omap4_keypad_open(struct input_dev *input)
{
	struct omap4_keypad *keypad_data = input_get_drvdata(input);

	pm_runtime_get_sync(input->dev.parent);

	disable_irq(keypad_data->irq);

	kbd_writel(keypad_data, OMAP4_KBD_CTRL,
			OMAP4_VAL_FUNCTIONALCFG);
	kbd_writel(keypad_data, OMAP4_KBD_DEBOUNCINGTIME,
			OMAP4_VAL_DEBOUNCINGTIME);
	kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS,
			OMAP4_VAL_IRQDISABLE);
	kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQENABLE,
			OMAP4_DEF_IRQENABLE_EVENTEN |
				OMAP4_DEF_IRQENABLE_LONGKEY);
	kbd_writel(keypad_data, OMAP4_KBD_WAKEUPENABLE,
			OMAP4_DEF_WUP_EVENT_ENA | OMAP4_DEF_WUP_LONG_KEY_ENA);

	enable_irq(keypad_data->irq);

	return 0;
}

static void omap4_keypad_close(struct input_dev *input)
{
	struct omap4_keypad *keypad_data = input_get_drvdata(input);

	disable_irq(keypad_data->irq);

	/* Disable interrupts */
	kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQENABLE,
			 OMAP4_VAL_IRQDISABLE);

	/* clear pending interrupts */
	kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS,
			 kbd_read_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS));

	enable_irq(keypad_data->irq);

	pm_runtime_put_sync(input->dev.parent);
}

#ifdef CONFIG_OF
static int __devinit omap4_keypad_parse_dt(struct device *dev,
					   struct omap4_keypad *keypad_data)
{
	struct device_node *np = dev->of_node;

	if (!np) {
		dev_err(dev, "missing DT data");
		return -EINVAL;
	}

	of_property_read_u32(np, "keypad,num-rows", &keypad_data->rows);
	of_property_read_u32(np, "keypad,num-columns", &keypad_data->cols);
	if (!keypad_data->rows || !keypad_data->cols) {
		dev_err(dev, "number of keypad rows/columns not specified\n");
		return -EINVAL;
	}

	if (of_get_property(np, "linux,input-no-autorepeat", NULL))
		keypad_data->no_autorepeat = true;

	return 0;
}
#else
static inline int omap4_keypad_parse_dt(struct device *dev,
					struct omap4_keypad *keypad_data)
{
	return -ENOSYS;
}
#endif

static int __devinit omap4_keypad_probe(struct platform_device *pdev)
{
	const struct omap4_keypad_platform_data *pdata =
				dev_get_platdata(&pdev->dev);
	const struct matrix_keymap_data *keymap_data =
				pdata ? pdata->keymap_data : NULL;
	struct omap4_keypad *keypad_data;
	struct input_dev *input_dev;
	struct resource *res;
	unsigned int max_keys;
	int rev;
	int irq;
	int error;

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!res) {
		dev_err(&pdev->dev, "no base address specified\n");
		return -EINVAL;
	}

	irq = platform_get_irq(pdev, 0);
	if (!irq) {
		dev_err(&pdev->dev, "no keyboard irq assigned\n");
		return -EINVAL;
	}

	keypad_data = kzalloc(sizeof(struct omap4_keypad), GFP_KERNEL);
	if (!keypad_data) {
		dev_err(&pdev->dev, "keypad_data memory allocation failed\n");
		return -ENOMEM;
	}

	keypad_data->irq = irq;

	if (pdata) {
		keypad_data->rows = pdata->rows;
		keypad_data->cols = pdata->cols;
	} else {
		error = omap4_keypad_parse_dt(&pdev->dev, keypad_data);
		if (error)
			return error;
	}

	res = request_mem_region(res->start, resource_size(res), pdev->name);
	if (!res) {
		dev_err(&pdev->dev, "can't request mem region\n");
		error = -EBUSY;
		goto err_free_keypad;
	}

	keypad_data->base = ioremap(res->start, resource_size(res));
	if (!keypad_data->base) {
		dev_err(&pdev->dev, "can't ioremap mem resource\n");
		error = -ENOMEM;
		goto err_release_mem;
	}


	/*
	 * Enable clocks for the keypad module so that we can read
	 * revision register.
	 */
	pm_runtime_enable(&pdev->dev);
	error = pm_runtime_get_sync(&pdev->dev);
	if (error) {
		dev_err(&pdev->dev, "pm_runtime_get_sync() failed\n");
		goto err_unmap;
	}
	rev = __raw_readl(keypad_data->base + OMAP4_KBD_REVISION);
	rev &= 0x03 << 30;
	rev >>= 30;
	switch (rev) {
	case KBD_REVISION_OMAP4:
		keypad_data->reg_offset = 0x00;
		keypad_data->irqreg_offset = 0x00;
		break;
	case KBD_REVISION_OMAP5:
		keypad_data->reg_offset = 0x10;
		keypad_data->irqreg_offset = 0x0c;
		break;
	default:
		dev_err(&pdev->dev,
			"Keypad reports unsupported revision %d", rev);
		error = -EINVAL;
		goto err_pm_put_sync;
	}

	/* input device allocation */
	keypad_data->input = input_dev = input_allocate_device();
	if (!input_dev) {
		error = -ENOMEM;
		goto err_pm_put_sync;
	}

	input_dev->name = pdev->name;
	input_dev->dev.parent = &pdev->dev;
	input_dev->id.bustype = BUS_HOST;
	input_dev->id.vendor = 0x0001;
	input_dev->id.product = 0x0001;
	input_dev->id.version = 0x0001;

	input_dev->open = omap4_keypad_open;
	input_dev->close = omap4_keypad_close;

	input_set_capability(input_dev, EV_MSC, MSC_SCAN);
	if (!keypad_data->no_autorepeat)
		__set_bit(EV_REP, input_dev->evbit);

	input_set_drvdata(input_dev, keypad_data);

	keypad_data->row_shift = get_count_order(keypad_data->cols);
	max_keys = keypad_data->rows << keypad_data->row_shift;
	keypad_data->keymap = kzalloc(max_keys * sizeof(keypad_data->keymap[0]),
				      GFP_KERNEL);
	if (!keypad_data->keymap) {
		dev_err(&pdev->dev, "Not enough memory for keymap\n");
		error = -ENOMEM;
		goto err_free_input;
	}

	error = matrix_keypad_build_keymap(keymap_data, NULL,
					   keypad_data->rows, keypad_data->cols,
					   keypad_data->keymap, input_dev);
	if (error) {
		dev_err(&pdev->dev, "failed to build keymap\n");
		goto err_free_keymap;
	}

	error = request_irq(keypad_data->irq, omap4_keypad_interrupt,
			     IRQF_TRIGGER_RISING,
			     "omap4-keypad", keypad_data);
	if (error) {
		dev_err(&pdev->dev, "failed to register interrupt\n");
		goto err_free_input;
	}

	pm_runtime_put_sync(&pdev->dev);

	error = input_register_device(keypad_data->input);
	if (error < 0) {
		dev_err(&pdev->dev, "failed to register input device\n");
		goto err_pm_disable;
	}

	platform_set_drvdata(pdev, keypad_data);
	return 0;

err_pm_disable:
	pm_runtime_disable(&pdev->dev);
	free_irq(keypad_data->irq, keypad_data);
err_free_keymap:
	kfree(keypad_data->keymap);
err_free_input:
	input_free_device(input_dev);
err_pm_put_sync:
	pm_runtime_put_sync(&pdev->dev);
err_unmap:
	iounmap(keypad_data->base);
err_release_mem:
	release_mem_region(res->start, resource_size(res));
err_free_keypad:
	kfree(keypad_data);
	return error;
}

static int __devexit omap4_keypad_remove(struct platform_device *pdev)
{
	struct omap4_keypad *keypad_data = platform_get_drvdata(pdev);
	struct resource *res;

	free_irq(keypad_data->irq, keypad_data);

	pm_runtime_disable(&pdev->dev);

	input_unregister_device(keypad_data->input);

	iounmap(keypad_data->base);

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	release_mem_region(res->start, resource_size(res));

	kfree(keypad_data->keymap);
	kfree(keypad_data);

	platform_set_drvdata(pdev, NULL);

	return 0;
}

#ifdef CONFIG_OF
static const struct of_device_id omap_keypad_dt_match[] = {
	{ .compatible = "ti,omap4-keypad" },
	{},
};
MODULE_DEVICE_TABLE(of, omap_keypad_dt_match);
#endif

static struct platform_driver omap4_keypad_driver = {
	.probe		= omap4_keypad_probe,
	.remove		= __devexit_p(omap4_keypad_remove),
	.driver		= {
		.name	= "omap4-keypad",
		.owner	= THIS_MODULE,
		.of_match_table = of_match_ptr(omap_keypad_dt_match),
	},
};
module_platform_driver(omap4_keypad_driver);

MODULE_AUTHOR("Texas Instruments");
MODULE_DESCRIPTION("OMAP4 Keypad Driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:omap4-keypad");
Commit	Line	Data
a17f7955 AA	1	/*
	2	* OMAP4 Keypad Driver
	3	*
	4	* Copyright (C) 2010 Texas Instruments
	5	*
	6	* Author: Abraham Arce <x0066660@ti.com>
	7	* Initial Code: Syed Rafiuddin <rafiuddin.syed@ti.com>
	8	*
	9	* This program is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License as published by
	11	* the Free Software Foundation; either version 2 of the License, or
	12	* (at your option) any later version.
	13	*
	14	* This program is distributed in the hope that it will be useful,
	15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	* GNU General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU General Public License
	20	* along with this program; if not, write to the Free Software
	21	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	22	*/
	23
	24	#include <linux/module.h>
	25	#include <linux/init.h>
	26	#include <linux/interrupt.h>
	27	#include <linux/platform_device.h>
	28	#include <linux/errno.h>
	29	#include <linux/io.h>
13987435	30	#include <linux/of.h>
a17f7955 AA	31	#include <linux/input.h>
a17f7955 AA	32	#include <linux/slab.h>
5ad567ff	33	#include <linux/pm_runtime.h>
a17f7955	34
0f1142a5	35	#include <linux/platform_data/omap4-keypad.h>
a17f7955 AA	36
	37	/* OMAP4 registers */
	38	#define OMAP4_KBD_REVISION 0x00
	39	#define OMAP4_KBD_SYSCONFIG 0x10
	40	#define OMAP4_KBD_SYSSTATUS 0x14
	41	#define OMAP4_KBD_IRQSTATUS 0x18
	42	#define OMAP4_KBD_IRQENABLE 0x1C
	43	#define OMAP4_KBD_WAKEUPENABLE 0x20
	44	#define OMAP4_KBD_PENDING 0x24
	45	#define OMAP4_KBD_CTRL 0x28
	46	#define OMAP4_KBD_DEBOUNCINGTIME 0x2C
	47	#define OMAP4_KBD_LONGKEYTIME 0x30
	48	#define OMAP4_KBD_TIMEOUT 0x34
	49	#define OMAP4_KBD_STATEMACHINE 0x38
	50	#define OMAP4_KBD_ROWINPUTS 0x3C
	51	#define OMAP4_KBD_COLUMNOUTPUTS 0x40
	52	#define OMAP4_KBD_FULLCODE31_0 0x44
	53	#define OMAP4_KBD_FULLCODE63_32 0x48
	54
	55	/* OMAP4 bit definitions */
a17f7955 AA	56	#define OMAP4_DEF_IRQENABLE_EVENTEN (1 << 0)
	57	#define OMAP4_DEF_IRQENABLE_LONGKEY (1 << 1)
	58	#define OMAP4_DEF_IRQENABLE_TIMEOUTEN (1 << 2)
9a34bc61 MT	59	#define OMAP4_DEF_WUP_EVENT_ENA (1 << 0)
9a34bc61 MT	60	#define OMAP4_DEF_WUP_LONG_KEY_ENA (1 << 1)
a17f7955 AA	61	#define OMAP4_DEF_CTRL_NOSOFTMODE (1 << 1)
	62	#define OMAP4_DEF_CTRLPTVVALUE (1 << 2)
	63	#define OMAP4_DEF_CTRLPTV (1 << 1)
a17f7955 AA	64
a17f7955 AA	65	/* OMAP4 values */
05362f48	66	#define OMAP4_VAL_IRQDISABLE 0x00
a17f7955 AA	67	#define OMAP4_VAL_DEBOUNCINGTIME 0x07
	68	#define OMAP4_VAL_FUNCTIONALCFG 0x1E
	69
	70	#define OMAP4_MASK_IRQSTATUSDISABLE 0xFFFF
	71
f77621cc PS	72	enum {
	73	KBD_REVISION_OMAP4 = 0,
	74	KBD_REVISION_OMAP5,
	75	};
	76
a17f7955 AA	77	struct omap4_keypad {
	78	struct input_dev *input;
	79
	80	void __iomem *base;
f77621cc	81	unsigned int irq;
a17f7955 AA	82
	83	unsigned int rows;
	84	unsigned int cols;
f77621cc PS	85	u32 reg_offset;
f77621cc PS	86	u32 irqreg_offset;
a17f7955	87	unsigned int row_shift;
13987435	88	bool no_autorepeat;
a17f7955	89	unsigned char key_state[8];
13987435	90	unsigned short *keymap;
a17f7955 AA	91	};
a17f7955 AA	92
f77621cc PS	93	static int kbd_readl(struct omap4_keypad *keypad_data, u32 offset)
	94	{
	95	return __raw_readl(keypad_data->base +
	96	keypad_data->reg_offset + offset);
	97	}
	98
	99	static void kbd_writel(struct omap4_keypad *keypad_data, u32 offset, u32 value)
	100	{
	101	__raw_writel(value,
	102	keypad_data->base + keypad_data->reg_offset + offset);
	103	}
	104
	105	static int kbd_read_irqreg(struct omap4_keypad *keypad_data, u32 offset)
	106	{
	107	return __raw_readl(keypad_data->base +
	108	keypad_data->irqreg_offset + offset);
	109	}
	110
	111	static void kbd_write_irqreg(struct omap4_keypad *keypad_data,
	112	u32 offset, u32 value)
	113	{
	114	__raw_writel(value,
	115	keypad_data->base + keypad_data->irqreg_offset + offset);
	116	}
	117
	118
a17f7955 AA	119	/* Interrupt handler */
	120	static irqreturn_t omap4_keypad_interrupt(int irq, void *dev_id)
	121	{
	122	struct omap4_keypad *keypad_data = dev_id;
	123	struct input_dev *input_dev = keypad_data->input;
	124	unsigned char key_state[ARRAY_SIZE(keypad_data->key_state)];
	125	unsigned int col, row, code, changed;
	126	u32 new_state = (u32 ) key_state;
	127
	128	/* Disable interrupts */
f77621cc PS	129	kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQENABLE,
f77621cc PS	130	OMAP4_VAL_IRQDISABLE);
a17f7955	131
f77621cc PS	132	*new_state = kbd_readl(keypad_data, OMAP4_KBD_FULLCODE31_0);
f77621cc PS	133	*(new_state + 1) = kbd_readl(keypad_data, OMAP4_KBD_FULLCODE63_32);
a17f7955 AA	134
	135	for (row = 0; row < keypad_data->rows; row++) {
	136	changed = key_state[row] ^ keypad_data->key_state[row];
	137	if (!changed)
	138	continue;
	139
	140	for (col = 0; col < keypad_data->cols; col++) {
	141	if (changed & (1 << col)) {
	142	code = MATRIX_SCAN_CODE(row, col,
	143	keypad_data->row_shift);
	144	input_event(input_dev, EV_MSC, MSC_SCAN, code);
	145	input_report_key(input_dev,
	146	keypad_data->keymap[code],
	147	key_state[row] & (1 << col));
	148	}
	149	}
	150	}
	151
	152	input_sync(input_dev);
	153
	154	memcpy(keypad_data->key_state, key_state,
	155	sizeof(keypad_data->key_state));
	156
	157	/* clear pending interrupts */
f77621cc PS	158	kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS,
f77621cc PS	159	kbd_read_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS));
a17f7955 AA	160
a17f7955 AA	161	/* enable interrupts */
f77621cc PS	162	kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQENABLE,
	163	OMAP4_DEF_IRQENABLE_EVENTEN \|
	164	OMAP4_DEF_IRQENABLE_LONGKEY);
a17f7955 AA	165
	166	return IRQ_HANDLED;
	167	}
	168
5ad567ff AA	169	static int omap4_keypad_open(struct input_dev *input)
	170	{
	171	struct omap4_keypad *keypad_data = input_get_drvdata(input);
	172
	173	pm_runtime_get_sync(input->dev.parent);
	174
	175	disable_irq(keypad_data->irq);
	176
f77621cc PS	177	kbd_writel(keypad_data, OMAP4_KBD_CTRL,
	178	OMAP4_VAL_FUNCTIONALCFG);
	179	kbd_writel(keypad_data, OMAP4_KBD_DEBOUNCINGTIME,
	180	OMAP4_VAL_DEBOUNCINGTIME);
	181	kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS,
	182	OMAP4_VAL_IRQDISABLE);
	183	kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQENABLE,
	184	OMAP4_DEF_IRQENABLE_EVENTEN \|
	185	OMAP4_DEF_IRQENABLE_LONGKEY);
	186	kbd_writel(keypad_data, OMAP4_KBD_WAKEUPENABLE,
	187	OMAP4_DEF_WUP_EVENT_ENA \| OMAP4_DEF_WUP_LONG_KEY_ENA);
5ad567ff AA	188
	189	enable_irq(keypad_data->irq);
	190
	191	return 0;
	192	}
	193
	194	static void omap4_keypad_close(struct input_dev *input)
	195	{
	196	struct omap4_keypad *keypad_data = input_get_drvdata(input);
	197
	198	disable_irq(keypad_data->irq);
	199
	200	/* Disable interrupts */
f77621cc PS	201	kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQENABLE,
f77621cc PS	202	OMAP4_VAL_IRQDISABLE);
5ad567ff AA	203
5ad567ff AA	204	/* clear pending interrupts */
f77621cc PS	205	kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS,
f77621cc PS	206	kbd_read_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS));
5ad567ff AA	207
	208	enable_irq(keypad_data->irq);
	209
	210	pm_runtime_put_sync(input->dev.parent);
	211	}
	212
13987435 SP	213	#ifdef CONFIG_OF
	214	static int __devinit omap4_keypad_parse_dt(struct device *dev,
	215	struct omap4_keypad *keypad_data)
	216	{
	217	struct device_node *np = dev->of_node;
	218
	219	if (!np) {
	220	dev_err(dev, "missing DT data");
	221	return -EINVAL;
	222	}
	223
	224	of_property_read_u32(np, "keypad,num-rows", &keypad_data->rows);
	225	of_property_read_u32(np, "keypad,num-columns", &keypad_data->cols);
	226	if (!keypad_data->rows \|\| !keypad_data->cols) {
	227	dev_err(dev, "number of keypad rows/columns not specified\n");
	228	return -EINVAL;
	229	}
	230
	231	if (of_get_property(np, "linux,input-no-autorepeat", NULL))
	232	keypad_data->no_autorepeat = true;
	233
	234	return 0;
	235	}
	236	#else
	237	static inline int omap4_keypad_parse_dt(struct device *dev,
	238	struct omap4_keypad *keypad_data)
	239	{
	240	return -ENOSYS;
	241	}
	242	#endif
	243
a17f7955 AA	244	static int __devinit omap4_keypad_probe(struct platform_device *pdev)
a17f7955 AA	245	{
13987435 SP	246	const struct omap4_keypad_platform_data *pdata =
	247	dev_get_platdata(&pdev->dev);
	248	const struct matrix_keymap_data *keymap_data =
	249	pdata ? pdata->keymap_data : NULL;
a17f7955 AA	250	struct omap4_keypad *keypad_data;
a17f7955 AA	251	struct input_dev *input_dev;
f3a1ba60	252	struct resource *res;
13987435	253	unsigned int max_keys;
f77621cc	254	int rev;
f3a1ba60	255	int irq;
a17f7955 AA	256	int error;
a17f7955 AA	257
f3a1ba60 AA	258	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
f3a1ba60 AA	259	if (!res) {
a17f7955 AA	260	dev_err(&pdev->dev, "no base address specified\n");
	261	return -EINVAL;
	262	}
	263
f3a1ba60 AA	264	irq = platform_get_irq(pdev, 0);
f3a1ba60 AA	265	if (!irq) {
a17f7955 AA	266	dev_err(&pdev->dev, "no keyboard irq assigned\n");
	267	return -EINVAL;
	268	}
	269
13987435	270	keypad_data = kzalloc(sizeof(struct omap4_keypad), GFP_KERNEL);
a17f7955 AA	271	if (!keypad_data) {
	272	dev_err(&pdev->dev, "keypad_data memory allocation failed\n");
	273	return -ENOMEM;
	274	}
	275
13987435 SP	276	keypad_data->irq = irq;
	277
	278	if (pdata) {
	279	keypad_data->rows = pdata->rows;
	280	keypad_data->cols = pdata->cols;
	281	} else {
	282	error = omap4_keypad_parse_dt(&pdev->dev, keypad_data);
	283	if (error)
	284	return error;
	285	}
f3a1ba60	286
13987435	287	res = request_mem_region(res->start, resource_size(res), pdev->name);
f3a1ba60 AA	288	if (!res) {
	289	dev_err(&pdev->dev, "can't request mem region\n");
	290	error = -EBUSY;
	291	goto err_free_keypad;
	292	}
a17f7955	293
f3a1ba60 AA	294	keypad_data->base = ioremap(res->start, resource_size(res));
	295	if (!keypad_data->base) {
	296	dev_err(&pdev->dev, "can't ioremap mem resource\n");
	297	error = -ENOMEM;
	298	goto err_release_mem;
	299	}
	300
a17f7955	301
f77621cc	302	/*
13987435 SP	303	* Enable clocks for the keypad module so that we can read
	304	* revision register.
	305	*/
f77621cc PS	306	pm_runtime_enable(&pdev->dev);
	307	error = pm_runtime_get_sync(&pdev->dev);
	308	if (error) {
	309	dev_err(&pdev->dev, "pm_runtime_get_sync() failed\n");
	310	goto err_unmap;
	311	}
	312	rev = __raw_readl(keypad_data->base + OMAP4_KBD_REVISION);
	313	rev &= 0x03 << 30;
	314	rev >>= 30;
	315	switch (rev) {
	316	case KBD_REVISION_OMAP4:
	317	keypad_data->reg_offset = 0x00;
	318	keypad_data->irqreg_offset = 0x00;
	319	break;
	320	case KBD_REVISION_OMAP5:
	321	keypad_data->reg_offset = 0x10;
	322	keypad_data->irqreg_offset = 0x0c;
	323	break;
	324	default:
	325	dev_err(&pdev->dev,
	326	"Keypad reports unsupported revision %d", rev);
	327	error = -EINVAL;
	328	goto err_pm_put_sync;
	329	}
	330
a17f7955 AA	331	/* input device allocation */
	332	keypad_data->input = input_dev = input_allocate_device();
	333	if (!input_dev) {
	334	error = -ENOMEM;
f77621cc	335	goto err_pm_put_sync;
a17f7955 AA	336	}
	337
	338	input_dev->name = pdev->name;
	339	input_dev->dev.parent = &pdev->dev;
	340	input_dev->id.bustype = BUS_HOST;
	341	input_dev->id.vendor = 0x0001;
	342	input_dev->id.product = 0x0001;
	343	input_dev->id.version = 0x0001;
	344
5ad567ff AA	345	input_dev->open = omap4_keypad_open;
	346	input_dev->close = omap4_keypad_close;
	347
13987435 SP	348	input_set_capability(input_dev, EV_MSC, MSC_SCAN);
	349	if (!keypad_data->no_autorepeat)
	350	__set_bit(EV_REP, input_dev->evbit);
	351
	352	input_set_drvdata(input_dev, keypad_data);
	353
	354	keypad_data->row_shift = get_count_order(keypad_data->cols);
	355	max_keys = keypad_data->rows << keypad_data->row_shift;
	356	keypad_data->keymap = kzalloc(max_keys * sizeof(keypad_data->keymap[0]),
	357	GFP_KERNEL);
	358	if (!keypad_data->keymap) {
	359	dev_err(&pdev->dev, "Not enough memory for keymap\n");
	360	error = -ENOMEM;
	361	goto err_free_input;
	362	}
	363
	364	error = matrix_keypad_build_keymap(keymap_data, NULL,
	365	keypad_data->rows, keypad_data->cols,
1932811f DT	366	keypad_data->keymap, input_dev);
	367	if (error) {
	368	dev_err(&pdev->dev, "failed to build keymap\n");
13987435	369	goto err_free_keymap;
1932811f	370	}
a17f7955	371
a17f7955	372	error = request_irq(keypad_data->irq, omap4_keypad_interrupt,
f8038c42	373	IRQF_TRIGGER_RISING,
a17f7955 AA	374	"omap4-keypad", keypad_data);
	375	if (error) {
	376	dev_err(&pdev->dev, "failed to register interrupt\n");
	377	goto err_free_input;
	378	}
	379
f77621cc	380	pm_runtime_put_sync(&pdev->dev);
5ad567ff	381
a17f7955 AA	382	error = input_register_device(keypad_data->input);
	383	if (error < 0) {
	384	dev_err(&pdev->dev, "failed to register input device\n");
5ad567ff	385	goto err_pm_disable;
a17f7955 AA	386	}
a17f7955 AA	387
a17f7955 AA	388	platform_set_drvdata(pdev, keypad_data);
	389	return 0;
	390
5ad567ff AA	391	err_pm_disable:
5ad567ff AA	392	pm_runtime_disable(&pdev->dev);
a17f7955	393	free_irq(keypad_data->irq, keypad_data);
13987435 SP	394	err_free_keymap:
13987435 SP	395	kfree(keypad_data->keymap);
a17f7955 AA	396	err_free_input:
a17f7955 AA	397	input_free_device(input_dev);
f77621cc PS	398	err_pm_put_sync:
f77621cc PS	399	pm_runtime_put_sync(&pdev->dev);
f3a1ba60 AA	400	err_unmap:
	401	iounmap(keypad_data->base);
	402	err_release_mem:
13987435	403	release_mem_region(res->start, resource_size(res));
a17f7955 AA	404	err_free_keypad:
	405	kfree(keypad_data);
	406	return error;
	407	}
	408
	409	static int __devexit omap4_keypad_remove(struct platform_device *pdev)
	410	{
	411	struct omap4_keypad *keypad_data = platform_get_drvdata(pdev);
f3a1ba60	412	struct resource *res;
a17f7955 AA	413
a17f7955 AA	414	free_irq(keypad_data->irq, keypad_data);
5ad567ff AA	415
	416	pm_runtime_disable(&pdev->dev);
	417
a17f7955	418	input_unregister_device(keypad_data->input);
f3a1ba60 AA	419
	420	iounmap(keypad_data->base);
	421
	422	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	423	release_mem_region(res->start, resource_size(res));
	424
13987435	425	kfree(keypad_data->keymap);
a17f7955	426	kfree(keypad_data);
13987435	427
a17f7955 AA	428	platform_set_drvdata(pdev, NULL);
	429
	430	return 0;
	431	}
	432
13987435 SP	433	#ifdef CONFIG_OF
	434	static const struct of_device_id omap_keypad_dt_match[] = {
	435	{ .compatible = "ti,omap4-keypad" },
	436	{},
	437	};
	438	MODULE_DEVICE_TABLE(of, omap_keypad_dt_match);
	439	#endif
	440
a17f7955 AA	441	static struct platform_driver omap4_keypad_driver = {
	442	.probe = omap4_keypad_probe,
	443	.remove = __devexit_p(omap4_keypad_remove),
	444	.driver = {
	445	.name = "omap4-keypad",
	446	.owner = THIS_MODULE,
13987435	447	.of_match_table = of_match_ptr(omap_keypad_dt_match),
a17f7955 AA	448	},
a17f7955 AA	449	};
5146c84f	450	module_platform_driver(omap4_keypad_driver);
a17f7955 AA	451
	452	MODULE_AUTHOR("Texas Instruments");
	453	MODULE_DESCRIPTION("OMAP4 Keypad Driver");
	454	MODULE_LICENSE("GPL");
	455	MODULE_ALIAS("platform:omap4-keypad");