[mirror_ubuntu-bionic-kernel.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/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/input/matrix_keypad.h>
#include <linux/slab.h>
#include <linux/pm_runtime.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	BIT(0)
#define OMAP4_DEF_IRQENABLE_LONGKEY	BIT(1)
#define OMAP4_DEF_WUP_EVENT_ENA		BIT(0)
#define OMAP4_DEF_WUP_LONG_KEY_ENA	BIT(1)
#define OMAP4_DEF_CTRL_NOSOFTMODE	BIT(1)
#define OMAP4_DEF_CTRL_PTV_SHIFT	2

/* OMAP4 values */
#define OMAP4_VAL_IRQDISABLE		0x0

/*
 * Errata i689: If a key is released for a time shorter than debounce time,
 * the keyboard will idle and never detect the key release. The workaround
 * is to use at least a 12ms debounce time. See omap5432 TRM chapter
 * "26.4.6.2 Keyboard Controller Timer" for more information.
 */
#define OMAP4_KEYPAD_PTV_DIV_128        0x6
#define OMAP4_KEYPAD_DEBOUNCINGTIME_MS(dbms, ptv)     \
	((((dbms) * 1000) / ((1 << ((ptv) + 1)) * (1000000 / 32768))) - 1)
#define OMAP4_VAL_DEBOUNCINGTIME_16MS					\
	OMAP4_KEYPAD_DEBOUNCINGTIME_MS(16, OMAP4_KEYPAD_PTV_DIV_128)

enum {
	KBD_REVISION_OMAP4 = 0,
	KBD_REVISION_OMAP5,
};

struct omap4_keypad {
	struct input_dev *input;

	void __iomem *base;
	bool irq_wake_enabled;
	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 handlers */
static irqreturn_t omap4_keypad_irq_handler(int irq, void *dev_id)
{
	struct omap4_keypad *keypad_data = dev_id;

	if (kbd_read_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS))
		return IRQ_WAKE_THREAD;

	return IRQ_NONE;
}

static irqreturn_t omap4_keypad_irq_thread_fn(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;

	*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));

	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_DEF_CTRL_NOSOFTMODE |
			(OMAP4_KEYPAD_PTV_DIV_128 << OMAP4_DEF_CTRL_PTV_SHIFT));
	kbd_writel(keypad_data, OMAP4_KBD_DEBOUNCINGTIME,
			OMAP4_VAL_DEBOUNCINGTIME_16MS);
	/* clear pending interrupts */
	kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS,
			 kbd_read_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS));
	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 and wake-up events */
	kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQENABLE,
			 OMAP4_VAL_IRQDISABLE);
	kbd_writel(keypad_data, OMAP4_KBD_WAKEUPENABLE, 0);

	/* 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);
}

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

	err = matrix_keypad_parse_properties(dev, &keypad_data->rows,
					     &keypad_data->cols);
	if (err)
		return err;

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

	return 0;
}

static int omap4_keypad_probe(struct platform_device *pdev)
{
	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;

	error = omap4_keypad_parse_dt(&pdev->dev, keypad_data);
	if (error)
		goto err_free_keypad;

	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(NULL, 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_threaded_irq(keypad_data->irq, omap4_keypad_irq_handler,
				     omap4_keypad_irq_thread_fn, IRQF_ONESHOT,
				     "omap4-keypad", keypad_data);
	if (error) {
		dev_err(&pdev->dev, "failed to register interrupt\n");
		goto err_free_keymap;
	}

	device_init_wakeup(&pdev->dev, true);
	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 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);

	return 0;
}

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

#ifdef CONFIG_PM_SLEEP
static int omap4_keypad_suspend(struct device *dev)
{
	struct platform_device *pdev = to_platform_device(dev);
	struct omap4_keypad *keypad_data = platform_get_drvdata(pdev);
	int error;

	if (device_may_wakeup(&pdev->dev)) {
		error = enable_irq_wake(keypad_data->irq);
		if (!error)
			keypad_data->irq_wake_enabled = true;
	}

	return 0;
}

static int omap4_keypad_resume(struct device *dev)
{
	struct platform_device *pdev = to_platform_device(dev);
	struct omap4_keypad *keypad_data = platform_get_drvdata(pdev);

	if (device_may_wakeup(&pdev->dev) && keypad_data->irq_wake_enabled) {
		disable_irq_wake(keypad_data->irq);
		keypad_data->irq_wake_enabled = false;
	}

	return 0;
}
#endif

static SIMPLE_DEV_PM_OPS(omap4_keypad_pm_ops,
			 omap4_keypad_suspend, omap4_keypad_resume);

static struct platform_driver omap4_keypad_driver = {
	.probe		= omap4_keypad_probe,
	.remove		= omap4_keypad_remove,
	.driver		= {
		.name	= "omap4-keypad",
		.pm	= &omap4_keypad_pm_ops,
		.of_match_table = 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>
a17f7955 AA	25	#include <linux/interrupt.h>
	26	#include <linux/platform_device.h>
	27	#include <linux/errno.h>
	28	#include <linux/io.h>
13987435	29	#include <linux/of.h>
a17f7955	30	#include <linux/input.h>
61721c88	31	#include <linux/input/matrix_keypad.h>
a17f7955	32	#include <linux/slab.h>
5ad567ff	33	#include <linux/pm_runtime.h>
a17f7955	34
a17f7955 AA	35	/* OMAP4 registers */
	36	#define OMAP4_KBD_REVISION 0x00
	37	#define OMAP4_KBD_SYSCONFIG 0x10
	38	#define OMAP4_KBD_SYSSTATUS 0x14
	39	#define OMAP4_KBD_IRQSTATUS 0x18
	40	#define OMAP4_KBD_IRQENABLE 0x1C
	41	#define OMAP4_KBD_WAKEUPENABLE 0x20
	42	#define OMAP4_KBD_PENDING 0x24
	43	#define OMAP4_KBD_CTRL 0x28
	44	#define OMAP4_KBD_DEBOUNCINGTIME 0x2C
	45	#define OMAP4_KBD_LONGKEYTIME 0x30
	46	#define OMAP4_KBD_TIMEOUT 0x34
	47	#define OMAP4_KBD_STATEMACHINE 0x38
	48	#define OMAP4_KBD_ROWINPUTS 0x3C
	49	#define OMAP4_KBD_COLUMNOUTPUTS 0x40
	50	#define OMAP4_KBD_FULLCODE31_0 0x44
	51	#define OMAP4_KBD_FULLCODE63_32 0x48
	52
	53	/* OMAP4 bit definitions */
875ad696 IS	54	#define OMAP4_DEF_IRQENABLE_EVENTEN BIT(0)
	55	#define OMAP4_DEF_IRQENABLE_LONGKEY BIT(1)
	56	#define OMAP4_DEF_WUP_EVENT_ENA BIT(0)
	57	#define OMAP4_DEF_WUP_LONG_KEY_ENA BIT(1)
	58	#define OMAP4_DEF_CTRL_NOSOFTMODE BIT(1)
	59	#define OMAP4_DEF_CTRL_PTV_SHIFT 2
a17f7955 AA	60
a17f7955 AA	61	/* OMAP4 values */
875ad696	62	#define OMAP4_VAL_IRQDISABLE 0x0
80163686 TL	63
	64	/*
	65	* Errata i689: If a key is released for a time shorter than debounce time,
	66	* the keyboard will idle and never detect the key release. The workaround
	67	* is to use at least a 12ms debounce time. See omap5432 TRM chapter
	68	* "26.4.6.2 Keyboard Controller Timer" for more information.
	69	*/
	70	#define OMAP4_KEYPAD_PTV_DIV_128 0x6
	71	#define OMAP4_KEYPAD_DEBOUNCINGTIME_MS(dbms, ptv) \
	72	((((dbms) * 1000) / ((1 << ((ptv) + 1)) * (1000000 / 32768))) - 1)
	73	#define OMAP4_VAL_DEBOUNCINGTIME_16MS \
	74	OMAP4_KEYPAD_DEBOUNCINGTIME_MS(16, OMAP4_KEYPAD_PTV_DIV_128)
a17f7955	75
f77621cc PS	76	enum {
	77	KBD_REVISION_OMAP4 = 0,
	78	KBD_REVISION_OMAP5,
	79	};
	80
a17f7955 AA	81	struct omap4_keypad {
	82	struct input_dev *input;
	83
	84	void __iomem *base;
78608a0d	85	bool irq_wake_enabled;
f77621cc	86	unsigned int irq;
a17f7955 AA	87
	88	unsigned int rows;
	89	unsigned int cols;
f77621cc PS	90	u32 reg_offset;
f77621cc PS	91	u32 irqreg_offset;
a17f7955	92	unsigned int row_shift;
13987435	93	bool no_autorepeat;
a17f7955	94	unsigned char key_state[8];
13987435	95	unsigned short *keymap;
a17f7955 AA	96	};
a17f7955 AA	97
f77621cc PS	98	static int kbd_readl(struct omap4_keypad *keypad_data, u32 offset)
	99	{
	100	return __raw_readl(keypad_data->base +
	101	keypad_data->reg_offset + offset);
	102	}
	103
	104	static void kbd_writel(struct omap4_keypad *keypad_data, u32 offset, u32 value)
	105	{
	106	__raw_writel(value,
	107	keypad_data->base + keypad_data->reg_offset + offset);
	108	}
	109
	110	static int kbd_read_irqreg(struct omap4_keypad *keypad_data, u32 offset)
	111	{
	112	return __raw_readl(keypad_data->base +
	113	keypad_data->irqreg_offset + offset);
	114	}
	115
	116	static void kbd_write_irqreg(struct omap4_keypad *keypad_data,
	117	u32 offset, u32 value)
	118	{
	119	__raw_writel(value,
	120	keypad_data->base + keypad_data->irqreg_offset + offset);
	121	}
	122
	123
c683da3e IS	124	/* Interrupt handlers */
	125	static irqreturn_t omap4_keypad_irq_handler(int irq, void *dev_id)
	126	{
	127	struct omap4_keypad *keypad_data = dev_id;
	128
a3a3c633	129	if (kbd_read_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS))
c683da3e	130	return IRQ_WAKE_THREAD;
c683da3e IS	131
	132	return IRQ_NONE;
	133	}
	134
	135	static irqreturn_t omap4_keypad_irq_thread_fn(int irq, void *dev_id)
a17f7955 AA	136	{
	137	struct omap4_keypad *keypad_data = dev_id;
	138	struct input_dev *input_dev = keypad_data->input;
	139	unsigned char key_state[ARRAY_SIZE(keypad_data->key_state)];
	140	unsigned int col, row, code, changed;
	141	u32 new_state = (u32 ) key_state;
	142
f77621cc PS	143	*new_state = kbd_readl(keypad_data, OMAP4_KBD_FULLCODE31_0);
f77621cc PS	144	*(new_state + 1) = kbd_readl(keypad_data, OMAP4_KBD_FULLCODE63_32);
a17f7955 AA	145
	146	for (row = 0; row < keypad_data->rows; row++) {
	147	changed = key_state[row] ^ keypad_data->key_state[row];
	148	if (!changed)
	149	continue;
	150
	151	for (col = 0; col < keypad_data->cols; col++) {
	152	if (changed & (1 << col)) {
	153	code = MATRIX_SCAN_CODE(row, col,
	154	keypad_data->row_shift);
	155	input_event(input_dev, EV_MSC, MSC_SCAN, code);
	156	input_report_key(input_dev,
	157	keypad_data->keymap[code],
	158	key_state[row] & (1 << col));
	159	}
	160	}
	161	}
	162
	163	input_sync(input_dev);
	164
	165	memcpy(keypad_data->key_state, key_state,
	166	sizeof(keypad_data->key_state));
	167
	168	/* clear pending interrupts */
f77621cc PS	169	kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS,
f77621cc PS	170	kbd_read_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS));
a17f7955	171
a17f7955 AA	172	return IRQ_HANDLED;
	173	}
	174
5ad567ff AA	175	static int omap4_keypad_open(struct input_dev *input)
	176	{
	177	struct omap4_keypad *keypad_data = input_get_drvdata(input);
	178
	179	pm_runtime_get_sync(input->dev.parent);
	180
	181	disable_irq(keypad_data->irq);
	182
f77621cc	183	kbd_writel(keypad_data, OMAP4_KBD_CTRL,
875ad696	184	OMAP4_DEF_CTRL_NOSOFTMODE \|
80163686	185	(OMAP4_KEYPAD_PTV_DIV_128 << OMAP4_DEF_CTRL_PTV_SHIFT));
f77621cc	186	kbd_writel(keypad_data, OMAP4_KBD_DEBOUNCINGTIME,
80163686	187	OMAP4_VAL_DEBOUNCINGTIME_16MS);
afbac60b	188	/* clear pending interrupts */
f77621cc	189	kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS,
afbac60b	190	kbd_read_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS));
f77621cc PS	191	kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQENABLE,
	192	OMAP4_DEF_IRQENABLE_EVENTEN \|
	193	OMAP4_DEF_IRQENABLE_LONGKEY);
	194	kbd_writel(keypad_data, OMAP4_KBD_WAKEUPENABLE,
	195	OMAP4_DEF_WUP_EVENT_ENA \| OMAP4_DEF_WUP_LONG_KEY_ENA);
5ad567ff AA	196
	197	enable_irq(keypad_data->irq);
	198
	199	return 0;
	200	}
	201
	202	static void omap4_keypad_close(struct input_dev *input)
	203	{
	204	struct omap4_keypad *keypad_data = input_get_drvdata(input);
	205
	206	disable_irq(keypad_data->irq);
	207
a3a3c633	208	/* Disable interrupts and wake-up events */
f77621cc PS	209	kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQENABLE,
f77621cc PS	210	OMAP4_VAL_IRQDISABLE);
a3a3c633	211	kbd_writel(keypad_data, OMAP4_KBD_WAKEUPENABLE, 0);
5ad567ff AA	212
5ad567ff AA	213	/* clear pending interrupts */
f77621cc PS	214	kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS,
f77621cc PS	215	kbd_read_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS));
5ad567ff AA	216
	217	enable_irq(keypad_data->irq);
	218
	219	pm_runtime_put_sync(input->dev.parent);
	220	}
	221
5298cc4c BP	222	static int omap4_keypad_parse_dt(struct device *dev,
5298cc4c BP	223	struct omap4_keypad *keypad_data)
13987435 SP	224	{
13987435 SP	225	struct device_node *np = dev->of_node;
43840415	226	int err;
13987435	227
aef01aad DT	228	err = matrix_keypad_parse_properties(dev, &keypad_data->rows,
aef01aad DT	229	&keypad_data->cols);
43840415 SG	230	if (err)
43840415 SG	231	return err;
13987435 SP	232
	233	if (of_get_property(np, "linux,input-no-autorepeat", NULL))
	234	keypad_data->no_autorepeat = true;
	235
	236	return 0;
	237	}
13987435	238
5298cc4c	239	static int omap4_keypad_probe(struct platform_device *pdev)
a17f7955	240	{
a17f7955 AA	241	struct omap4_keypad *keypad_data;
a17f7955 AA	242	struct input_dev *input_dev;
f3a1ba60	243	struct resource *res;
13987435	244	unsigned int max_keys;
f77621cc	245	int rev;
f3a1ba60	246	int irq;
a17f7955 AA	247	int error;
a17f7955 AA	248
f3a1ba60 AA	249	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
f3a1ba60 AA	250	if (!res) {
a17f7955 AA	251	dev_err(&pdev->dev, "no base address specified\n");
	252	return -EINVAL;
	253	}
	254
f3a1ba60 AA	255	irq = platform_get_irq(pdev, 0);
f3a1ba60 AA	256	if (!irq) {
a17f7955 AA	257	dev_err(&pdev->dev, "no keyboard irq assigned\n");
	258	return -EINVAL;
	259	}
	260
13987435	261	keypad_data = kzalloc(sizeof(struct omap4_keypad), GFP_KERNEL);
a17f7955 AA	262	if (!keypad_data) {
	263	dev_err(&pdev->dev, "keypad_data memory allocation failed\n");
	264	return -ENOMEM;
	265	}
	266
13987435 SP	267	keypad_data->irq = irq;
13987435 SP	268
61721c88 JE	269	error = omap4_keypad_parse_dt(&pdev->dev, keypad_data);
61721c88 JE	270	if (error)
b83b1459	271	goto err_free_keypad;
f3a1ba60	272
13987435	273	res = request_mem_region(res->start, resource_size(res), pdev->name);
f3a1ba60 AA	274	if (!res) {
	275	dev_err(&pdev->dev, "can't request mem region\n");
	276	error = -EBUSY;
	277	goto err_free_keypad;
	278	}
a17f7955	279
f3a1ba60 AA	280	keypad_data->base = ioremap(res->start, resource_size(res));
	281	if (!keypad_data->base) {
	282	dev_err(&pdev->dev, "can't ioremap mem resource\n");
	283	error = -ENOMEM;
	284	goto err_release_mem;
	285	}
	286
a17f7955	287
f77621cc	288	/*
13987435 SP	289	* Enable clocks for the keypad module so that we can read
	290	* revision register.
	291	*/
f77621cc PS	292	pm_runtime_enable(&pdev->dev);
	293	error = pm_runtime_get_sync(&pdev->dev);
	294	if (error) {
	295	dev_err(&pdev->dev, "pm_runtime_get_sync() failed\n");
	296	goto err_unmap;
	297	}
	298	rev = __raw_readl(keypad_data->base + OMAP4_KBD_REVISION);
	299	rev &= 0x03 << 30;
	300	rev >>= 30;
	301	switch (rev) {
	302	case KBD_REVISION_OMAP4:
	303	keypad_data->reg_offset = 0x00;
	304	keypad_data->irqreg_offset = 0x00;
	305	break;
	306	case KBD_REVISION_OMAP5:
	307	keypad_data->reg_offset = 0x10;
	308	keypad_data->irqreg_offset = 0x0c;
	309	break;
	310	default:
	311	dev_err(&pdev->dev,
	312	"Keypad reports unsupported revision %d", rev);
	313	error = -EINVAL;
	314	goto err_pm_put_sync;
	315	}
	316
a17f7955 AA	317	/* input device allocation */
	318	keypad_data->input = input_dev = input_allocate_device();
	319	if (!input_dev) {
	320	error = -ENOMEM;
f77621cc	321	goto err_pm_put_sync;
a17f7955 AA	322	}
	323
	324	input_dev->name = pdev->name;
	325	input_dev->dev.parent = &pdev->dev;
	326	input_dev->id.bustype = BUS_HOST;
	327	input_dev->id.vendor = 0x0001;
	328	input_dev->id.product = 0x0001;
	329	input_dev->id.version = 0x0001;
	330
5ad567ff AA	331	input_dev->open = omap4_keypad_open;
	332	input_dev->close = omap4_keypad_close;
	333
13987435 SP	334	input_set_capability(input_dev, EV_MSC, MSC_SCAN);
	335	if (!keypad_data->no_autorepeat)
	336	__set_bit(EV_REP, input_dev->evbit);
	337
	338	input_set_drvdata(input_dev, keypad_data);
	339
	340	keypad_data->row_shift = get_count_order(keypad_data->cols);
	341	max_keys = keypad_data->rows << keypad_data->row_shift;
	342	keypad_data->keymap = kzalloc(max_keys * sizeof(keypad_data->keymap[0]),
	343	GFP_KERNEL);
	344	if (!keypad_data->keymap) {
	345	dev_err(&pdev->dev, "Not enough memory for keymap\n");
	346	error = -ENOMEM;
	347	goto err_free_input;
	348	}
	349
61721c88	350	error = matrix_keypad_build_keymap(NULL, NULL,
13987435	351	keypad_data->rows, keypad_data->cols,
1932811f DT	352	keypad_data->keymap, input_dev);
	353	if (error) {
	354	dev_err(&pdev->dev, "failed to build keymap\n");
13987435	355	goto err_free_keymap;
1932811f	356	}
a17f7955	357
c683da3e	358	error = request_threaded_irq(keypad_data->irq, omap4_keypad_irq_handler,
a3a3c633	359	omap4_keypad_irq_thread_fn, IRQF_ONESHOT,
c683da3e	360	"omap4-keypad", keypad_data);
a17f7955 AA	361	if (error) {
a17f7955 AA	362	dev_err(&pdev->dev, "failed to register interrupt\n");
9bb9dc13	363	goto err_free_keymap;
a17f7955 AA	364	}
a17f7955 AA	365
78608a0d	366	device_init_wakeup(&pdev->dev, true);
f77621cc	367	pm_runtime_put_sync(&pdev->dev);
5ad567ff	368
a17f7955 AA	369	error = input_register_device(keypad_data->input);
	370	if (error < 0) {
	371	dev_err(&pdev->dev, "failed to register input device\n");
5ad567ff	372	goto err_pm_disable;
a17f7955 AA	373	}
a17f7955 AA	374
a17f7955 AA	375	platform_set_drvdata(pdev, keypad_data);
	376	return 0;
	377
5ad567ff AA	378	err_pm_disable:
5ad567ff AA	379	pm_runtime_disable(&pdev->dev);
a17f7955	380	free_irq(keypad_data->irq, keypad_data);
13987435 SP	381	err_free_keymap:
13987435 SP	382	kfree(keypad_data->keymap);
a17f7955 AA	383	err_free_input:
a17f7955 AA	384	input_free_device(input_dev);
f77621cc PS	385	err_pm_put_sync:
f77621cc PS	386	pm_runtime_put_sync(&pdev->dev);
f3a1ba60 AA	387	err_unmap:
	388	iounmap(keypad_data->base);
	389	err_release_mem:
13987435	390	release_mem_region(res->start, resource_size(res));
a17f7955 AA	391	err_free_keypad:
	392	kfree(keypad_data);
	393	return error;
	394	}
	395
e2619cf7	396	static int omap4_keypad_remove(struct platform_device *pdev)
a17f7955 AA	397	{
a17f7955 AA	398	struct omap4_keypad *keypad_data = platform_get_drvdata(pdev);
f3a1ba60	399	struct resource *res;
a17f7955 AA	400
a17f7955 AA	401	free_irq(keypad_data->irq, keypad_data);
5ad567ff AA	402
	403	pm_runtime_disable(&pdev->dev);
	404
a17f7955	405	input_unregister_device(keypad_data->input);
f3a1ba60 AA	406
	407	iounmap(keypad_data->base);
	408
	409	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	410	release_mem_region(res->start, resource_size(res));
	411
13987435	412	kfree(keypad_data->keymap);
a17f7955	413	kfree(keypad_data);
13987435	414
a17f7955 AA	415	return 0;
	416	}
	417
13987435 SP	418	static const struct of_device_id omap_keypad_dt_match[] = {
	419	{ .compatible = "ti,omap4-keypad" },
	420	{},
	421	};
	422	MODULE_DEVICE_TABLE(of, omap_keypad_dt_match);
13987435	423
78608a0d IS	424	#ifdef CONFIG_PM_SLEEP
	425	static int omap4_keypad_suspend(struct device *dev)
	426	{
	427	struct platform_device *pdev = to_platform_device(dev);
	428	struct omap4_keypad *keypad_data = platform_get_drvdata(pdev);
	429	int error;
	430
	431	if (device_may_wakeup(&pdev->dev)) {
	432	error = enable_irq_wake(keypad_data->irq);
	433	if (!error)
	434	keypad_data->irq_wake_enabled = true;
	435	}
	436
	437	return 0;
	438	}
	439
	440	static int omap4_keypad_resume(struct device *dev)
	441	{
	442	struct platform_device *pdev = to_platform_device(dev);
	443	struct omap4_keypad *keypad_data = platform_get_drvdata(pdev);
	444
	445	if (device_may_wakeup(&pdev->dev) && keypad_data->irq_wake_enabled) {
	446	disable_irq_wake(keypad_data->irq);
	447	keypad_data->irq_wake_enabled = false;
	448	}
	449
	450	return 0;
	451	}
	452	#endif
	453
	454	static SIMPLE_DEV_PM_OPS(omap4_keypad_pm_ops,
	455	omap4_keypad_suspend, omap4_keypad_resume);
	456
a17f7955 AA	457	static struct platform_driver omap4_keypad_driver = {
a17f7955 AA	458	.probe = omap4_keypad_probe,
1cb0aa88	459	.remove = omap4_keypad_remove,
a17f7955 AA	460	.driver = {
a17f7955 AA	461	.name = "omap4-keypad",
78608a0d	462	.pm = &omap4_keypad_pm_ops,
61721c88	463	.of_match_table = omap_keypad_dt_match,
a17f7955 AA	464	},
a17f7955 AA	465	};
5146c84f	466	module_platform_driver(omap4_keypad_driver);
a17f7955 AA	467
	468	MODULE_AUTHOR("Texas Instruments");
	469	MODULE_DESCRIPTION("OMAP4 Keypad Driver");
	470	MODULE_LICENSE("GPL");
	471	MODULE_ALIAS("platform:omap4-keypad");