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

/*
 * linux/drivers/input/keyboard/omap-keypad.c
 *
 * OMAP Keypad Driver
 *
 * Copyright (C) 2003 Nokia Corporation
 * Written by Timo Teräs <ext-timo.teras@nokia.com>
 *
 * Added support for H2 & H3 Keypad
 * Copyright (C) 2004 Texas Instruments
 *
 * 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/interrupt.h>
#include <linux/types.h>
#include <linux/input.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/mutex.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/gpio.h>
#include <linux/platform_data/gpio-omap.h>
#include <linux/platform_data/keypad-omap.h>

#undef NEW_BOARD_LEARNING_MODE

static void omap_kp_tasklet(unsigned long);
static void omap_kp_timer(unsigned long);

static unsigned char keypad_state[8];
static DEFINE_MUTEX(kp_enable_mutex);
static int kp_enable = 1;
static int kp_cur_group = -1;

struct omap_kp {
	struct input_dev *input;
	struct timer_list timer;
	int irq;
	unsigned int rows;
	unsigned int cols;
	unsigned long delay;
	unsigned int debounce;
	unsigned short keymap[];
};

static DECLARE_TASKLET_DISABLED(kp_tasklet, omap_kp_tasklet, 0);

static unsigned int *row_gpios;
static unsigned int *col_gpios;

#ifdef CONFIG_ARCH_OMAP2
static void set_col_gpio_val(struct omap_kp *omap_kp, u8 value)
{
	int col;

	for (col = 0; col < omap_kp->cols; col++)
		gpio_set_value(col_gpios[col], value & (1 << col));
}

static u8 get_row_gpio_val(struct omap_kp *omap_kp)
{
	int row;
	u8 value = 0;

	for (row = 0; row < omap_kp->rows; row++) {
		if (gpio_get_value(row_gpios[row]))
			value |= (1 << row);
	}
	return value;
}
#else
#define		set_col_gpio_val(x, y)	do {} while (0)
#define		get_row_gpio_val(x)	0
#endif

static irqreturn_t omap_kp_interrupt(int irq, void *dev_id)
{
	/* disable keyboard interrupt and schedule for handling */
	omap_writew(1, OMAP1_MPUIO_BASE + OMAP_MPUIO_KBD_MASKIT);

	tasklet_schedule(&kp_tasklet);

	return IRQ_HANDLED;
}

static void omap_kp_timer(unsigned long data)
{
	tasklet_schedule(&kp_tasklet);
}

static void omap_kp_scan_keypad(struct omap_kp *omap_kp, unsigned char *state)
{
	int col = 0;

	/* disable keyboard interrupt and schedule for handling */
	omap_writew(1, OMAP1_MPUIO_BASE + OMAP_MPUIO_KBD_MASKIT);

	/* read the keypad status */
	omap_writew(0xff, OMAP1_MPUIO_BASE + OMAP_MPUIO_KBC);
	for (col = 0; col < omap_kp->cols; col++) {
		omap_writew(~(1 << col) & 0xff,
			    OMAP1_MPUIO_BASE + OMAP_MPUIO_KBC);

		udelay(omap_kp->delay);

		state[col] = ~omap_readw(OMAP1_MPUIO_BASE +
					 OMAP_MPUIO_KBR_LATCH) & 0xff;
	}
	omap_writew(0x00, OMAP1_MPUIO_BASE + OMAP_MPUIO_KBC);
	udelay(2);
}

static void omap_kp_tasklet(unsigned long data)
{
	struct omap_kp *omap_kp_data = (struct omap_kp *) data;
	unsigned short *keycodes = omap_kp_data->input->keycode;
	unsigned int row_shift = get_count_order(omap_kp_data->cols);
	unsigned char new_state[8], changed, key_down = 0;
	int col, row;

	/* check for any changes */
	omap_kp_scan_keypad(omap_kp_data, new_state);

	/* check for changes and print those */
	for (col = 0; col < omap_kp_data->cols; col++) {
		changed = new_state[col] ^ keypad_state[col];
		key_down |= new_state[col];
		if (changed == 0)
			continue;

		for (row = 0; row < omap_kp_data->rows; row++) {
			int key;
			if (!(changed & (1 << row)))
				continue;
#ifdef NEW_BOARD_LEARNING_MODE
			printk(KERN_INFO "omap-keypad: key %d-%d %s\n", col,
			       row, (new_state[col] & (1 << row)) ?
			       "pressed" : "released");
#else
			key = keycodes[MATRIX_SCAN_CODE(row, col, row_shift)];

			if (!(kp_cur_group == (key & GROUP_MASK) ||
			      kp_cur_group == -1))
				continue;

			kp_cur_group = key & GROUP_MASK;
			input_report_key(omap_kp_data->input, key & ~GROUP_MASK,
					 new_state[col] & (1 << row));
#endif
		}
	}
	input_sync(omap_kp_data->input);
	memcpy(keypad_state, new_state, sizeof(keypad_state));

	if (key_down) {
		/* some key is pressed - keep irq disabled and use timer
		 * to poll the keypad */
		mod_timer(&omap_kp_data->timer, jiffies + HZ / 20);
	} else {
		/* enable interrupts */
		omap_writew(0, OMAP1_MPUIO_BASE + OMAP_MPUIO_KBD_MASKIT);
		kp_cur_group = -1;
	}
}

static ssize_t omap_kp_enable_show(struct device *dev,
				   struct device_attribute *attr, char *buf)
{
	return sprintf(buf, "%u\n", kp_enable);
}

static ssize_t omap_kp_enable_store(struct device *dev, struct device_attribute *attr,
				    const char *buf, size_t count)
{
	struct omap_kp *omap_kp = dev_get_drvdata(dev);
	int state;

	if (sscanf(buf, "%u", &state) != 1)
		return -EINVAL;

	if ((state != 1) && (state != 0))
		return -EINVAL;

	mutex_lock(&kp_enable_mutex);
	if (state != kp_enable) {
		if (state)
			enable_irq(omap_kp->irq);
		else
			disable_irq(omap_kp->irq);
		kp_enable = state;
	}
	mutex_unlock(&kp_enable_mutex);

	return strnlen(buf, count);
}

static DEVICE_ATTR(enable, S_IRUGO | S_IWUSR, omap_kp_enable_show, omap_kp_enable_store);

static int omap_kp_probe(struct platform_device *pdev)
{
	struct omap_kp *omap_kp;
	struct input_dev *input_dev;
	struct omap_kp_platform_data *pdata = dev_get_platdata(&pdev->dev);
	int i, col_idx, row_idx, ret;
	unsigned int row_shift, keycodemax;

	if (!pdata->rows || !pdata->cols || !pdata->keymap_data) {
		printk(KERN_ERR "No rows, cols or keymap_data from pdata\n");
		return -EINVAL;
	}

	row_shift = get_count_order(pdata->cols);
	keycodemax = pdata->rows << row_shift;

	omap_kp = kzalloc(sizeof(struct omap_kp) +
			keycodemax * sizeof(unsigned short), GFP_KERNEL);
	input_dev = input_allocate_device();
	if (!omap_kp || !input_dev) {
		kfree(omap_kp);
		input_free_device(input_dev);
		return -ENOMEM;
	}

	platform_set_drvdata(pdev, omap_kp);

	omap_kp->input = input_dev;

	/* Disable the interrupt for the MPUIO keyboard */
	omap_writew(1, OMAP1_MPUIO_BASE + OMAP_MPUIO_KBD_MASKIT);

	if (pdata->delay)
		omap_kp->delay = pdata->delay;

	if (pdata->row_gpios && pdata->col_gpios) {
		row_gpios = pdata->row_gpios;
		col_gpios = pdata->col_gpios;
	}

	omap_kp->rows = pdata->rows;
	omap_kp->cols = pdata->cols;

	col_idx = 0;
	row_idx = 0;

	setup_timer(&omap_kp->timer, omap_kp_timer, (unsigned long)omap_kp);

	/* get the irq and init timer*/
	kp_tasklet.data = (unsigned long) omap_kp;
	tasklet_enable(&kp_tasklet);

	ret = device_create_file(&pdev->dev, &dev_attr_enable);
	if (ret < 0)
		goto err2;

	/* setup input device */
	input_dev->name = "omap-keypad";
	input_dev->phys = "omap-keypad/input0";
	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 = 0x0100;

	if (pdata->rep)
		__set_bit(EV_REP, input_dev->evbit);

	ret = matrix_keypad_build_keymap(pdata->keymap_data, NULL,
					 pdata->rows, pdata->cols,
					 omap_kp->keymap, input_dev);
	if (ret < 0)
		goto err3;

	ret = input_register_device(omap_kp->input);
	if (ret < 0) {
		printk(KERN_ERR "Unable to register omap-keypad input device\n");
		goto err3;
	}

	if (pdata->dbounce)
		omap_writew(0xff, OMAP1_MPUIO_BASE + OMAP_MPUIO_GPIO_DEBOUNCING);

	/* scan current status and enable interrupt */
	omap_kp_scan_keypad(omap_kp, keypad_state);
	omap_kp->irq = platform_get_irq(pdev, 0);
	if (omap_kp->irq >= 0) {
		if (request_irq(omap_kp->irq, omap_kp_interrupt, 0,
				"omap-keypad", omap_kp) < 0)
			goto err4;
	}
	omap_writew(0, OMAP1_MPUIO_BASE + OMAP_MPUIO_KBD_MASKIT);

	return 0;

err4:
	input_unregister_device(omap_kp->input);
	input_dev = NULL;
err3:
	device_remove_file(&pdev->dev, &dev_attr_enable);
err2:
	for (i = row_idx - 1; i >= 0; i--)
		gpio_free(row_gpios[i]);
	for (i = col_idx - 1; i >= 0; i--)
		gpio_free(col_gpios[i]);

	kfree(omap_kp);
	input_free_device(input_dev);

	return -EINVAL;
}

static int omap_kp_remove(struct platform_device *pdev)
{
	struct omap_kp *omap_kp = platform_get_drvdata(pdev);

	/* disable keypad interrupt handling */
	tasklet_disable(&kp_tasklet);
	omap_writew(1, OMAP1_MPUIO_BASE + OMAP_MPUIO_KBD_MASKIT);
	free_irq(omap_kp->irq, omap_kp);

	del_timer_sync(&omap_kp->timer);
	tasklet_kill(&kp_tasklet);

	/* unregister everything */
	input_unregister_device(omap_kp->input);

	kfree(omap_kp);

	return 0;
}

static struct platform_driver omap_kp_driver = {
	.probe		= omap_kp_probe,
	.remove		= omap_kp_remove,
	.driver		= {
		.name	= "omap-keypad",
	},
};
module_platform_driver(omap_kp_driver);

MODULE_AUTHOR("Timo Teräs");
MODULE_DESCRIPTION("OMAP Keypad Driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:omap-keypad");
Commit	Line	Data
ad4e09b1 KS	1	/*
	2	* linux/drivers/input/keyboard/omap-keypad.c
	3	*
	4	* OMAP Keypad Driver
	5	*
	6	* Copyright (C) 2003 Nokia Corporation
96de0e25	7	* Written by Timo Teräs <ext-timo.teras@nokia.com>
ad4e09b1 KS	8	*
	9	* Added support for H2 & H3 Keypad
	10	* Copyright (C) 2004 Texas Instruments
	11	*
	12	* This program is free software; you can redistribute it and/or modify
	13	* it under the terms of the GNU General Public License as published by
	14	* the Free Software Foundation; either version 2 of the License, or
	15	* (at your option) any later version.
	16	*
	17	* This program is distributed in the hope that it will be useful,
	18	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	19	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	20	* GNU General Public License for more details.
	21	*
	22	* You should have received a copy of the GNU General Public License
	23	* along with this program; if not, write to the Free Software
	24	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	25	*/
	26
	27	#include <linux/module.h>
ad4e09b1 KS	28	#include <linux/interrupt.h>
	29	#include <linux/types.h>
	30	#include <linux/input.h>
	31	#include <linux/kernel.h>
	32	#include <linux/delay.h>
	33	#include <linux/platform_device.h>
	34	#include <linux/mutex.h>
	35	#include <linux/errno.h>
5a0e3ad6	36	#include <linux/slab.h>
f799a3d8 TL	37	#include <linux/gpio.h>
f799a3d8 TL	38	#include <linux/platform_data/gpio-omap.h>
2203747c	39	#include <linux/platform_data/keypad-omap.h>
ad4e09b1 KS	40
	41	#undef NEW_BOARD_LEARNING_MODE
	42
	43	static void omap_kp_tasklet(unsigned long);
	44	static void omap_kp_timer(unsigned long);
	45
	46	static unsigned char keypad_state[8];
	47	static DEFINE_MUTEX(kp_enable_mutex);
	48	static int kp_enable = 1;
	49	static int kp_cur_group = -1;
	50
	51	struct omap_kp {
	52	struct input_dev *input;
	53	struct timer_list timer;
	54	int irq;
	55	unsigned int rows;
	56	unsigned int cols;
	57	unsigned long delay;
	58	unsigned int debounce;
1932811f	59	unsigned short keymap[];
ad4e09b1 KS	60	};
ad4e09b1 KS	61
7c8ad982	62	static DECLARE_TASKLET_DISABLED(kp_tasklet, omap_kp_tasklet, 0);
ad4e09b1	63
ad4e09b1 KS	64	static unsigned int *row_gpios;
	65	static unsigned int *col_gpios;
	66
	67	#ifdef CONFIG_ARCH_OMAP2
	68	static void set_col_gpio_val(struct omap_kp *omap_kp, u8 value)
	69	{
	70	int col;
93a22f8b DB	71
	72	for (col = 0; col < omap_kp->cols; col++)
	73	gpio_set_value(col_gpios[col], value & (1 << col));
ad4e09b1 KS	74	}
	75
	76	static u8 get_row_gpio_val(struct omap_kp *omap_kp)
	77	{
	78	int row;
	79	u8 value = 0;
	80
	81	for (row = 0; row < omap_kp->rows; row++) {
93a22f8b	82	if (gpio_get_value(row_gpios[row]))
ad4e09b1 KS	83	value \|= (1 << row);
	84	}
	85	return value;
	86	}
	87	#else
	88	#define set_col_gpio_val(x, y) do {} while (0)
	89	#define get_row_gpio_val(x) 0
	90	#endif
	91
7d12e780	92	static irqreturn_t omap_kp_interrupt(int irq, void *dev_id)
ad4e09b1	93	{
ad4e09b1	94	/* disable keyboard interrupt and schedule for handling */
f799a3d8	95	omap_writew(1, OMAP1_MPUIO_BASE + OMAP_MPUIO_KBD_MASKIT);
ad4e09b1 KS	96
	97	tasklet_schedule(&kp_tasklet);
	98
	99	return IRQ_HANDLED;
	100	}
	101
	102	static void omap_kp_timer(unsigned long data)
	103	{
	104	tasklet_schedule(&kp_tasklet);
	105	}
	106
	107	static void omap_kp_scan_keypad(struct omap_kp omap_kp, unsigned char state)
	108	{
	109	int col = 0;
	110
f799a3d8 TL	111	/* disable keyboard interrupt and schedule for handling */
f799a3d8 TL	112	omap_writew(1, OMAP1_MPUIO_BASE + OMAP_MPUIO_KBD_MASKIT);
ad4e09b1	113
f799a3d8 TL	114	/* read the keypad status */
	115	omap_writew(0xff, OMAP1_MPUIO_BASE + OMAP_MPUIO_KBC);
	116	for (col = 0; col < omap_kp->cols; col++) {
	117	omap_writew(~(1 << col) & 0xff,
	118	OMAP1_MPUIO_BASE + OMAP_MPUIO_KBC);
ad4e09b1	119
f799a3d8	120	udelay(omap_kp->delay);
ad4e09b1	121
f799a3d8 TL	122	state[col] = ~omap_readw(OMAP1_MPUIO_BASE +
f799a3d8 TL	123	OMAP_MPUIO_KBR_LATCH) & 0xff;
ad4e09b1	124	}
f799a3d8 TL	125	omap_writew(0x00, OMAP1_MPUIO_BASE + OMAP_MPUIO_KBC);
f799a3d8 TL	126	udelay(2);
ad4e09b1 KS	127	}
ad4e09b1 KS	128
ad4e09b1 KS	129	static void omap_kp_tasklet(unsigned long data)
	130	{
	131	struct omap_kp omap_kp_data = (struct omap_kp ) data;
da1f026b JK	132	unsigned short *keycodes = omap_kp_data->input->keycode;
da1f026b JK	133	unsigned int row_shift = get_count_order(omap_kp_data->cols);
ad4e09b1 KS	134	unsigned char new_state[8], changed, key_down = 0;
ad4e09b1 KS	135	int col, row;
ad4e09b1 KS	136
	137	/* check for any changes */
	138	omap_kp_scan_keypad(omap_kp_data, new_state);
	139
	140	/* check for changes and print those */
	141	for (col = 0; col < omap_kp_data->cols; col++) {
	142	changed = new_state[col] ^ keypad_state[col];
	143	key_down \|= new_state[col];
	144	if (changed == 0)
	145	continue;
	146
	147	for (row = 0; row < omap_kp_data->rows; row++) {
	148	int key;
	149	if (!(changed & (1 << row)))
	150	continue;
	151	#ifdef NEW_BOARD_LEARNING_MODE
	152	printk(KERN_INFO "omap-keypad: key %d-%d %s\n", col,
	153	row, (new_state[col] & (1 << row)) ?
	154	"pressed" : "released");
	155	#else
da1f026b	156	key = keycodes[MATRIX_SCAN_CODE(row, col, row_shift)];
ad4e09b1 KS	157
	158	if (!(kp_cur_group == (key & GROUP_MASK) \|\|
	159	kp_cur_group == -1))
	160	continue;
	161
	162	kp_cur_group = key & GROUP_MASK;
	163	input_report_key(omap_kp_data->input, key & ~GROUP_MASK,
	164	new_state[col] & (1 << row));
	165	#endif
	166	}
	167	}
b27af563	168	input_sync(omap_kp_data->input);
ad4e09b1 KS	169	memcpy(keypad_state, new_state, sizeof(keypad_state));
	170
	171	if (key_down) {
ad4e09b1 KS	172	/* some key is pressed - keep irq disabled and use timer
ad4e09b1 KS	173	* to poll the keypad */
94016680	174	mod_timer(&omap_kp_data->timer, jiffies + HZ / 20);
ad4e09b1 KS	175	} else {
ad4e09b1 KS	176	/* enable interrupts */
f799a3d8 TL	177	omap_writew(0, OMAP1_MPUIO_BASE + OMAP_MPUIO_KBD_MASKIT);
f799a3d8 TL	178	kp_cur_group = -1;
9360353f	179	}
ad4e09b1 KS	180	}
	181
	182	static ssize_t omap_kp_enable_show(struct device *dev,
	183	struct device_attribute attr, char buf)
	184	{
	185	return sprintf(buf, "%u\n", kp_enable);
	186	}
	187
	188	static ssize_t omap_kp_enable_store(struct device dev, struct device_attribute attr,
	189	const char *buf, size_t count)
	190	{
f799a3d8	191	struct omap_kp *omap_kp = dev_get_drvdata(dev);
ad4e09b1 KS	192	int state;
	193
	194	if (sscanf(buf, "%u", &state) != 1)
	195	return -EINVAL;
	196
	197	if ((state != 1) && (state != 0))
	198	return -EINVAL;
	199
	200	mutex_lock(&kp_enable_mutex);
	201	if (state != kp_enable) {
	202	if (state)
f799a3d8	203	enable_irq(omap_kp->irq);
ad4e09b1	204	else
f799a3d8	205	disable_irq(omap_kp->irq);
ad4e09b1 KS	206	kp_enable = state;
	207	}
	208	mutex_unlock(&kp_enable_mutex);
	209
	210	return strnlen(buf, count);
	211	}
	212
	213	static DEVICE_ATTR(enable, S_IRUGO \| S_IWUSR, omap_kp_enable_show, omap_kp_enable_store);
	214
5298cc4c	215	static int omap_kp_probe(struct platform_device *pdev)
ad4e09b1 KS	216	{
	217	struct omap_kp *omap_kp;
	218	struct input_dev *input_dev;
c838cb3d	219	struct omap_kp_platform_data *pdata = dev_get_platdata(&pdev->dev);
f799a3d8	220	int i, col_idx, row_idx, ret;
da1f026b	221	unsigned int row_shift, keycodemax;
ad4e09b1	222
da1f026b JK	223	if (!pdata->rows \|\| !pdata->cols \|\| !pdata->keymap_data) {
da1f026b JK	224	printk(KERN_ERR "No rows, cols or keymap_data from pdata\n");
ad4e09b1 KS	225	return -EINVAL;
	226	}
	227
da1f026b JK	228	row_shift = get_count_order(pdata->cols);
	229	keycodemax = pdata->rows << row_shift;
	230
	231	omap_kp = kzalloc(sizeof(struct omap_kp) +
	232	keycodemax * sizeof(unsigned short), GFP_KERNEL);
ad4e09b1 KS	233	input_dev = input_allocate_device();
	234	if (!omap_kp \|\| !input_dev) {
	235	kfree(omap_kp);
	236	input_free_device(input_dev);
	237	return -ENOMEM;
	238	}
	239
	240	platform_set_drvdata(pdev, omap_kp);
	241
	242	omap_kp->input = input_dev;
	243
	244	/* Disable the interrupt for the MPUIO keyboard */
f799a3d8	245	omap_writew(1, OMAP1_MPUIO_BASE + OMAP_MPUIO_KBD_MASKIT);
ad4e09b1	246
ad4e09b1 KS	247	if (pdata->delay)
	248	omap_kp->delay = pdata->delay;
	249
	250	if (pdata->row_gpios && pdata->col_gpios) {
	251	row_gpios = pdata->row_gpios;
	252	col_gpios = pdata->col_gpios;
	253	}
	254
	255	omap_kp->rows = pdata->rows;
	256	omap_kp->cols = pdata->cols;
	257
f799a3d8 TL	258	col_idx = 0;
f799a3d8 TL	259	row_idx = 0;
ad4e09b1 KS	260
	261	setup_timer(&omap_kp->timer, omap_kp_timer, (unsigned long)omap_kp);
	262
	263	/* get the irq and init timer*/
ad4e09b1	264	kp_tasklet.data = (unsigned long) omap_kp;
7ae6cfe8	265	tasklet_enable(&kp_tasklet);
ad4e09b1 KS	266
	267	ret = device_create_file(&pdev->dev, &dev_attr_enable);
	268	if (ret < 0)
	269	goto err2;
	270
	271	/* setup input device */
ad4e09b1 KS	272	input_dev->name = "omap-keypad";
ad4e09b1 KS	273	input_dev->phys = "omap-keypad/input0";
469ba4df	274	input_dev->dev.parent = &pdev->dev;
ad4e09b1 KS	275
	276	input_dev->id.bustype = BUS_HOST;
	277	input_dev->id.vendor = 0x0001;
	278	input_dev->id.product = 0x0001;
	279	input_dev->id.version = 0x0100;
	280
1932811f DT	281	if (pdata->rep)
	282	__set_bit(EV_REP, input_dev->evbit);
	283
	284	ret = matrix_keypad_build_keymap(pdata->keymap_data, NULL,
	285	pdata->rows, pdata->cols,
	286	omap_kp->keymap, input_dev);
	287	if (ret < 0)
	288	goto err3;
	289
ad4e09b1 KS	290	ret = input_register_device(omap_kp->input);
	291	if (ret < 0) {
	292	printk(KERN_ERR "Unable to register omap-keypad input device\n");
	293	goto err3;
	294	}
	295
	296	if (pdata->dbounce)
6175556f	297	omap_writew(0xff, OMAP1_MPUIO_BASE + OMAP_MPUIO_GPIO_DEBOUNCING);
ad4e09b1 KS	298
	299	/* scan current status and enable interrupt */
	300	omap_kp_scan_keypad(omap_kp, keypad_state);
f799a3d8 TL	301	omap_kp->irq = platform_get_irq(pdev, 0);
	302	if (omap_kp->irq >= 0) {
	303	if (request_irq(omap_kp->irq, omap_kp_interrupt, 0,
	304	"omap-keypad", omap_kp) < 0)
	305	goto err4;
ad4e09b1	306	}
f799a3d8 TL	307	omap_writew(0, OMAP1_MPUIO_BASE + OMAP_MPUIO_KBD_MASKIT);
f799a3d8 TL	308
ad4e09b1	309	return 0;
f799a3d8	310
ad4e09b1 KS	311	err4:
	312	input_unregister_device(omap_kp->input);
	313	input_dev = NULL;
	314	err3:
	315	device_remove_file(&pdev->dev, &dev_attr_enable);
	316	err2:
9e14f36b	317	for (i = row_idx - 1; i >= 0; i--)
93a22f8b	318	gpio_free(row_gpios[i]);
9e14f36b	319	for (i = col_idx - 1; i >= 0; i--)
93a22f8b	320	gpio_free(col_gpios[i]);
ad4e09b1 KS	321
	322	kfree(omap_kp);
	323	input_free_device(input_dev);
	324
	325	return -EINVAL;
	326	}
	327
e2619cf7	328	static int omap_kp_remove(struct platform_device *pdev)
ad4e09b1 KS	329	{
	330	struct omap_kp *omap_kp = platform_get_drvdata(pdev);
	331
	332	/* disable keypad interrupt handling */
	333	tasklet_disable(&kp_tasklet);
f799a3d8 TL	334	omap_writew(1, OMAP1_MPUIO_BASE + OMAP_MPUIO_KBD_MASKIT);
f799a3d8 TL	335	free_irq(omap_kp->irq, omap_kp);
ad4e09b1 KS	336
	337	del_timer_sync(&omap_kp->timer);
	338	tasklet_kill(&kp_tasklet);
	339
	340	/* unregister everything */
	341	input_unregister_device(omap_kp->input);
	342
	343	kfree(omap_kp);
	344
	345	return 0;
	346	}
	347
	348	static struct platform_driver omap_kp_driver = {
	349	.probe = omap_kp_probe,
1cb0aa88	350	.remove = omap_kp_remove,
ad4e09b1 KS	351	.driver = {
	352	.name = "omap-keypad",
	353	},
	354	};
5146c84f	355	module_platform_driver(omap_kp_driver);
ad4e09b1	356
96de0e25	357	MODULE_AUTHOR("Timo Teräs");
ad4e09b1 KS	358	MODULE_DESCRIPTION("OMAP Keypad Driver");
ad4e09b1 KS	359	MODULE_LICENSE("GPL");
d7b5247b	360	MODULE_ALIAS("platform:omap-keypad");