drivers/input/keyboard/omap4-keypad.c - kernel/msm-4.19 - Gitiles

 /*
  * 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/input.h>
 #include <linux/slab.h>

 #include <plat/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

 struct omap4_keypad {
 	struct input_dev *input;

 	void __iomem *base;
 	int irq;

 	unsigned int rows;
 	unsigned int cols;
 	unsigned int row_shift;
 	unsigned char key_state[8];
 	unsigned short keymap[];
 };

 static void __devinit omap4_keypad_config(struct omap4_keypad *keypad_data)
 {
 	__raw_writel(OMAP4_VAL_FUNCTIONALCFG,
 			keypad_data->base + OMAP4_KBD_CTRL);
 	__raw_writel(OMAP4_VAL_DEBOUNCINGTIME,
 			keypad_data->base + OMAP4_KBD_DEBOUNCINGTIME);
 	__raw_writel(OMAP4_VAL_IRQDISABLE,
 			keypad_data->base + OMAP4_KBD_IRQSTATUS);
 	__raw_writel(OMAP4_DEF_IRQENABLE_EVENTEN | OMAP4_DEF_IRQENABLE_LONGKEY,
 			keypad_data->base + OMAP4_KBD_IRQENABLE);
 	__raw_writel(OMAP4_DEF_WUP_EVENT_ENA | OMAP4_DEF_WUP_LONG_KEY_ENA,
 			keypad_data->base + OMAP4_KBD_WAKEUPENABLE);
 }

 /* 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 */
 	__raw_writel(OMAP4_VAL_IRQDISABLE,
 		     keypad_data->base + OMAP4_KBD_IRQENABLE);

 	*new_state = __raw_readl(keypad_data->base + OMAP4_KBD_FULLCODE31_0);
 	*(new_state + 1) = __raw_readl(keypad_data->base
 						+ 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 */
 	__raw_writel(__raw_readl(keypad_data->base + OMAP4_KBD_IRQSTATUS),
 			keypad_data->base + OMAP4_KBD_IRQSTATUS);

 	/* enable interrupts */
 	__raw_writel(OMAP4_DEF_IRQENABLE_EVENTEN | OMAP4_DEF_IRQENABLE_LONGKEY,
 			keypad_data->base + OMAP4_KBD_IRQENABLE);

 	return IRQ_HANDLED;
 }

 static int __devinit omap4_keypad_probe(struct platform_device *pdev)
 {
 	const struct omap4_keypad_platform_data *pdata;
 	struct omap4_keypad *keypad_data;
 	struct input_dev *input_dev;
 	struct resource *res;
 	resource_size_t size;
 	unsigned int row_shift, max_keys;
 	int irq;
 	int error;

 	/* platform data */
 	pdata = pdev->dev.platform_data;
 	if (!pdata) {
 		dev_err(&pdev->dev, "no platform data defined\n");
 		return -EINVAL;
 	}

 	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;
 	}

 	if (!pdata->keymap_data) {
 		dev_err(&pdev->dev, "no keymap data defined\n");
 		return -EINVAL;
 	}

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

 	keypad_data = kzalloc(sizeof(struct omap4_keypad) +
 				max_keys * sizeof(keypad_data->keymap[0]),
 			      GFP_KERNEL);
 	if (!keypad_data) {
 		dev_err(&pdev->dev, "keypad_data memory allocation failed\n");
 		return -ENOMEM;
 	}

 	size = resource_size(res);

 	res = request_mem_region(res->start, size, 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;
 	}

 	keypad_data->irq = irq;
 	keypad_data->row_shift = row_shift;
 	keypad_data->rows = pdata->rows;
 	keypad_data->cols = pdata->cols;

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

 	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->keycode	= keypad_data->keymap;
 	input_dev->keycodesize	= sizeof(keypad_data->keymap[0]);
 	input_dev->keycodemax	= max_keys;

 	__set_bit(EV_KEY, input_dev->evbit);
 	__set_bit(EV_REP, input_dev->evbit);

 	input_set_capability(input_dev, EV_MSC, MSC_SCAN);

 	input_set_drvdata(input_dev, keypad_data);

 	matrix_keypad_build_keymap(pdata->keymap_data, row_shift,
 			input_dev->keycode, input_dev->keybit);

 	omap4_keypad_config(keypad_data);

 	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;
 	}

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


 	platform_set_drvdata(pdev, keypad_data);
 	return 0;

 err_free_irq:
 	free_irq(keypad_data->irq, keypad_data);
 err_free_input:
 	input_free_device(input_dev);
 err_unmap:
 	iounmap(keypad_data->base);
 err_release_mem:
 	release_mem_region(res->start, size);
 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);
 	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);
 	platform_set_drvdata(pdev, NULL);

 	return 0;
 }

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

 static int __init omap4_keypad_init(void)
 {
 	return platform_driver_register(&omap4_keypad_driver);
 }
 module_init(omap4_keypad_init);

 static void __exit omap4_keypad_exit(void)
 {
 	platform_driver_unregister(&omap4_keypad_driver);
 }
 module_exit(omap4_keypad_exit);

 MODULE_AUTHOR("Texas Instruments");
 MODULE_DESCRIPTION("OMAP4 Keypad Driver");
 MODULE_LICENSE("GPL");
 MODULE_ALIAS("platform:omap4-keypad");
	/*
	* 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/input.h>
	#include <linux/slab.h>

	#include <plat/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

	struct omap4_keypad {
	struct input_dev *input;

	void __iomem *base;
	int irq;

	unsigned int rows;
	unsigned int cols;
	unsigned int row_shift;
	unsigned char key_state[8];
	unsigned short keymap[];
	};

	static void __devinit omap4_keypad_config(struct omap4_keypad *keypad_data)
	{
	__raw_writel(OMAP4_VAL_FUNCTIONALCFG,
	keypad_data->base + OMAP4_KBD_CTRL);
	__raw_writel(OMAP4_VAL_DEBOUNCINGTIME,
	keypad_data->base + OMAP4_KBD_DEBOUNCINGTIME);
	__raw_writel(OMAP4_VAL_IRQDISABLE,
	keypad_data->base + OMAP4_KBD_IRQSTATUS);
	__raw_writel(OMAP4_DEF_IRQENABLE_EVENTEN \| OMAP4_DEF_IRQENABLE_LONGKEY,
	keypad_data->base + OMAP4_KBD_IRQENABLE);
	__raw_writel(OMAP4_DEF_WUP_EVENT_ENA \| OMAP4_DEF_WUP_LONG_KEY_ENA,
	keypad_data->base + OMAP4_KBD_WAKEUPENABLE);
	}

	/* 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 */
	__raw_writel(OMAP4_VAL_IRQDISABLE,
	keypad_data->base + OMAP4_KBD_IRQENABLE);

	*new_state = __raw_readl(keypad_data->base + OMAP4_KBD_FULLCODE31_0);
	*(new_state + 1) = __raw_readl(keypad_data->base
	+ 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 */
	__raw_writel(__raw_readl(keypad_data->base + OMAP4_KBD_IRQSTATUS),
	keypad_data->base + OMAP4_KBD_IRQSTATUS);

	/* enable interrupts */
	__raw_writel(OMAP4_DEF_IRQENABLE_EVENTEN \| OMAP4_DEF_IRQENABLE_LONGKEY,
	keypad_data->base + OMAP4_KBD_IRQENABLE);

	return IRQ_HANDLED;
	}

	static int __devinit omap4_keypad_probe(struct platform_device *pdev)
	{
	const struct omap4_keypad_platform_data *pdata;
	struct omap4_keypad *keypad_data;
	struct input_dev *input_dev;
	struct resource *res;
	resource_size_t size;
	unsigned int row_shift, max_keys;
	int irq;
	int error;

	/* platform data */
	pdata = pdev->dev.platform_data;
	if (!pdata) {
	dev_err(&pdev->dev, "no platform data defined\n");
	return -EINVAL;
	}

	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;
	}

	if (!pdata->keymap_data) {
	dev_err(&pdev->dev, "no keymap data defined\n");
	return -EINVAL;
	}

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

	keypad_data = kzalloc(sizeof(struct omap4_keypad) +
	max_keys * sizeof(keypad_data->keymap[0]),
	GFP_KERNEL);
	if (!keypad_data) {
	dev_err(&pdev->dev, "keypad_data memory allocation failed\n");
	return -ENOMEM;
	}

	size = resource_size(res);

	res = request_mem_region(res->start, size, 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;
	}

	keypad_data->irq = irq;
	keypad_data->row_shift = row_shift;
	keypad_data->rows = pdata->rows;
	keypad_data->cols = pdata->cols;

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

	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->keycode = keypad_data->keymap;
	input_dev->keycodesize = sizeof(keypad_data->keymap[0]);
	input_dev->keycodemax = max_keys;

	__set_bit(EV_KEY, input_dev->evbit);
	__set_bit(EV_REP, input_dev->evbit);

	input_set_capability(input_dev, EV_MSC, MSC_SCAN);

	input_set_drvdata(input_dev, keypad_data);

	matrix_keypad_build_keymap(pdata->keymap_data, row_shift,
	input_dev->keycode, input_dev->keybit);

	omap4_keypad_config(keypad_data);

	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;
	}

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


	platform_set_drvdata(pdev, keypad_data);
	return 0;

	err_free_irq:
	free_irq(keypad_data->irq, keypad_data);
	err_free_input:
	input_free_device(input_dev);
	err_unmap:
	iounmap(keypad_data->base);
	err_release_mem:
	release_mem_region(res->start, size);
	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);
	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);
	platform_set_drvdata(pdev, NULL);

	return 0;
	}

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

	static int __init omap4_keypad_init(void)
	{
	return platform_driver_register(&omap4_keypad_driver);
	}
	module_init(omap4_keypad_init);

	static void __exit omap4_keypad_exit(void)
	{
	platform_driver_unregister(&omap4_keypad_driver);
	}
	module_exit(omap4_keypad_exit);

	MODULE_AUTHOR("Texas Instruments");
	MODULE_DESCRIPTION("OMAP4 Keypad Driver");
	MODULE_LICENSE("GPL");
	MODULE_ALIAS("platform:omap4-keypad");