drivers/input/keyboard/w90p910_keypad.c - third_party/linux - Git at Google


            
            /*

            
             * Copyright (c) 2008-2009 Nuvoton technology corporation.

            
             *

            
             * Wan ZongShun <mcuos.com@gmail.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;version 2 of the License.

            
             *

            
             */


            #include <linux/kernel.h>

            
            #include <linux/module.h>

            
            #include <linux/interrupt.h>

            
            #include <linux/input.h>

            
            #include <linux/device.h>

            
            #include <linux/platform_device.h>

            
            #include <linux/clk.h>

            
            #include <linux/err.h>

            
            #include <linux/io.h>

            
            #include <linux/slab.h>


            #include <linux/platform_data/keypad-w90p910.h>


            /* Keypad Interface Control Registers */

            
            #define KPI_CONF		0x00

            
            #define KPI_3KCONF		0x04

            
            #define KPI_LPCONF		0x08

            
            #define KPI_STATUS		0x0C


            #define IS1KEY			(0x01 << 16)

            
            #define INTTR			(0x01 << 21)

            
            #define KEY0R			(0x0f << 3)

            
            #define KEY0C			0x07

            
            #define DEBOUNCE_BIT		0x08

            
            #define KSIZE0			(0x01 << 16)

            
            #define KSIZE1			(0x01 << 17)

            
            #define KPSEL			(0x01 << 19)

            
            #define ENKP			(0x01 << 18)


            #define KGET_RAW(n)		(((n) & KEY0R) >> 3)

            
            #define KGET_COLUMN(n)		((n) & KEY0C)


            #define W90P910_NUM_ROWS	8

            
            #define W90P910_NUM_COLS	8

            
            #define W90P910_ROW_SHIFT	3


            struct w90p910_keypad {

            
            	const struct w90p910_keypad_platform_data *pdata;

            
            	struct clk *clk;

            
            	struct input_dev *input_dev;

            
            	void __iomem *mmio_base;

            
            	int irq;

            
            	unsigned short keymap[W90P910_NUM_ROWS * W90P910_NUM_COLS];

            
            };


            static void w90p910_keypad_scan_matrix(struct w90p910_keypad *keypad,

            
            							unsigned int status)

            
            {

            
            	struct input_dev *input_dev = keypad->input_dev;

            
            	unsigned int row = KGET_RAW(status);

            
            	unsigned int col = KGET_COLUMN(status);

            
            	unsigned int code = MATRIX_SCAN_CODE(row, col, W90P910_ROW_SHIFT);

            
            	unsigned int key = keypad->keymap[code];


            	input_event(input_dev, EV_MSC, MSC_SCAN, code);

            
            	input_report_key(input_dev, key, 1);

            
            	input_sync(input_dev);


            	input_event(input_dev, EV_MSC, MSC_SCAN, code);

            
            	input_report_key(input_dev, key, 0);

            
            	input_sync(input_dev);

            
            }


            static irqreturn_t w90p910_keypad_irq_handler(int irq, void *dev_id)

            
            {

            
            	struct w90p910_keypad *keypad = dev_id;

            
            	unsigned int  kstatus, val;


            	kstatus = __raw_readl(keypad->mmio_base + KPI_STATUS);


            	val = INTTR | IS1KEY;


            	if (kstatus & val)

            
            		w90p910_keypad_scan_matrix(keypad, kstatus);


            	return IRQ_HANDLED;

            
            }


            static int w90p910_keypad_open(struct input_dev *dev)

            
            {

            
            	struct w90p910_keypad *keypad = input_get_drvdata(dev);

            
            	const struct w90p910_keypad_platform_data *pdata = keypad->pdata;

            
            	unsigned int val, config;


            	/* Enable unit clock */

            
            	clk_enable(keypad->clk);


            	val = __raw_readl(keypad->mmio_base + KPI_CONF);

            
            	val |= (KPSEL | ENKP);

            
            	val &= ~(KSIZE0 | KSIZE1);


            	config = pdata->prescale | (pdata->debounce << DEBOUNCE_BIT);


            	val |= config;


            	__raw_writel(val, keypad->mmio_base + KPI_CONF);


            	return 0;

            
            }


            static void w90p910_keypad_close(struct input_dev *dev)

            
            {

            
            	struct w90p910_keypad *keypad = input_get_drvdata(dev);


            	/* Disable clock unit */

            
            	clk_disable(keypad->clk);

            
            }


            static int w90p910_keypad_probe(struct platform_device *pdev)

            
            {

            
            	const struct w90p910_keypad_platform_data *pdata =

            
            						dev_get_platdata(&pdev->dev);

            
            	const struct matrix_keymap_data *keymap_data;

            
            	struct w90p910_keypad *keypad;

            
            	struct input_dev *input_dev;

            
            	struct resource *res;

            
            	int irq;

            
            	int error;


            	if (!pdata) {

            
            		dev_err(&pdev->dev, "no platform data defined\n");

            
            		return -EINVAL;

            
            	}


            	keymap_data = pdata->keymap_data;


            	irq = platform_get_irq(pdev, 0);

            
            	if (irq < 0) {

            
            		dev_err(&pdev->dev, "failed to get keypad irq\n");

            
            		return -ENXIO;

            
            	}


            	keypad = kzalloc(sizeof(struct w90p910_keypad), GFP_KERNEL);

            
            	input_dev = input_allocate_device();

            
            	if (!keypad || !input_dev) {

            
            		dev_err(&pdev->dev, "failed to allocate driver data\n");

            
            		error = -ENOMEM;

            
            		goto failed_free;

            
            	}


            	keypad->pdata = pdata;

            
            	keypad->input_dev = input_dev;

            
            	keypad->irq = irq;


            	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);

            
            	if (res == NULL) {

            
            		dev_err(&pdev->dev, "failed to get I/O memory\n");

            
            		error = -ENXIO;

            
            		goto failed_free;

            
            	}


            	res = request_mem_region(res->start, resource_size(res), pdev->name);

            
            	if (res == NULL) {

            
            		dev_err(&pdev->dev, "failed to request I/O memory\n");

            
            		error = -EBUSY;

            
            		goto failed_free;

            
            	}


            	keypad->mmio_base = ioremap(res->start, resource_size(res));

            
            	if (keypad->mmio_base == NULL) {

            
            		dev_err(&pdev->dev, "failed to remap I/O memory\n");

            
            		error = -ENXIO;

            
            		goto failed_free_res;

            
            	}


            	keypad->clk = clk_get(&pdev->dev, NULL);

            
            	if (IS_ERR(keypad->clk)) {

            
            		dev_err(&pdev->dev, "failed to get keypad clock\n");

            
            		error = PTR_ERR(keypad->clk);

            
            		goto failed_free_io;

            
            	}


            	/* set multi-function pin for w90p910 kpi. */

            
            	mfp_set_groupi(&pdev->dev);


            	input_dev->name = pdev->name;

            
            	input_dev->id.bustype = BUS_HOST;

            
            	input_dev->open = w90p910_keypad_open;

            
            	input_dev->close = w90p910_keypad_close;

            
            	input_dev->dev.parent = &pdev->dev;


            	error = matrix_keypad_build_keymap(keymap_data, NULL,

            
            					   W90P910_NUM_ROWS, W90P910_NUM_COLS,

            
            					   keypad->keymap, input_dev);

            
            	if (error) {

            
            		dev_err(&pdev->dev, "failed to build keymap\n");

            
            		goto failed_put_clk;

            
            	}


            	error = request_irq(keypad->irq, w90p910_keypad_irq_handler,

            
            			    0, pdev->name, keypad);

            
            	if (error) {

            
            		dev_err(&pdev->dev, "failed to request IRQ\n");

            
            		goto failed_put_clk;

            
            	}


            	__set_bit(EV_REP, input_dev->evbit);

            
            	input_set_capability(input_dev, EV_MSC, MSC_SCAN);

            
            	input_set_drvdata(input_dev, keypad);


            	/* Register the input device */

            
            	error = input_register_device(input_dev);

            
            	if (error) {

            
            		dev_err(&pdev->dev, "failed to register input device\n");

            
            		goto failed_free_irq;

            
            	}


            	platform_set_drvdata(pdev, keypad);

            
            	return 0;


            failed_free_irq:

            
            	free_irq(irq, keypad);

            
            failed_put_clk:

            
            	clk_put(keypad->clk);

            
            failed_free_io:

            
            	iounmap(keypad->mmio_base);

            
            failed_free_res:

            
            	release_mem_region(res->start, resource_size(res));

            
            failed_free:

            
            	input_free_device(input_dev);

            
            	kfree(keypad);

            
            	return error;

            
            }


            static int w90p910_keypad_remove(struct platform_device *pdev)

            
            {

            
            	struct w90p910_keypad *keypad = platform_get_drvdata(pdev);

            
            	struct resource *res;


            	free_irq(keypad->irq, keypad);


            	clk_put(keypad->clk);


            	input_unregister_device(keypad->input_dev);


            	iounmap(keypad->mmio_base);

            
            	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);

            
            	release_mem_region(res->start, resource_size(res));


            	kfree(keypad);


            	return 0;

            
            }


            static struct platform_driver w90p910_keypad_driver = {

            
            	.probe		= w90p910_keypad_probe,

            
            	.remove		= w90p910_keypad_remove,

            
            	.driver		= {

            
            		.name	= "nuc900-kpi",

            
            	},

            
            };

            
            module_platform_driver(w90p910_keypad_driver);


            MODULE_AUTHOR("Wan ZongShun <mcuos.com@gmail.com>");

            
            MODULE_DESCRIPTION("w90p910 keypad driver");

            
            MODULE_LICENSE("GPL");

            
            MODULE_ALIAS("platform:nuc900-keypad");
	/*
	* Copyright (c) 2008-2009 Nuvoton technology corporation.
	*
	* Wan ZongShun <mcuos.com@gmail.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;version 2 of the License.
	*
	*/

	#include <linux/kernel.h>
	#include <linux/module.h>
	#include <linux/interrupt.h>
	#include <linux/input.h>
	#include <linux/device.h>
	#include <linux/platform_device.h>
	#include <linux/clk.h>
	#include <linux/err.h>
	#include <linux/io.h>
	#include <linux/slab.h>

	#include <linux/platform_data/keypad-w90p910.h>

	/* Keypad Interface Control Registers */
	#define KPI_CONF 0x00
	#define KPI_3KCONF 0x04
	#define KPI_LPCONF 0x08
	#define KPI_STATUS 0x0C

	#define IS1KEY (0x01 << 16)
	#define INTTR (0x01 << 21)
	#define KEY0R (0x0f << 3)
	#define KEY0C 0x07
	#define DEBOUNCE_BIT 0x08
	#define KSIZE0 (0x01 << 16)
	#define KSIZE1 (0x01 << 17)
	#define KPSEL (0x01 << 19)
	#define ENKP (0x01 << 18)

	#define KGET_RAW(n) (((n) & KEY0R) >> 3)
	#define KGET_COLUMN(n) ((n) & KEY0C)

	#define W90P910_NUM_ROWS 8
	#define W90P910_NUM_COLS 8
	#define W90P910_ROW_SHIFT 3

	struct w90p910_keypad {
	const struct w90p910_keypad_platform_data *pdata;
	struct clk *clk;
	struct input_dev *input_dev;
	void __iomem *mmio_base;
	int irq;
	unsigned short keymap[W90P910_NUM_ROWS * W90P910_NUM_COLS];
	};

	static void w90p910_keypad_scan_matrix(struct w90p910_keypad *keypad,
	unsigned int status)
	{
	struct input_dev *input_dev = keypad->input_dev;
	unsigned int row = KGET_RAW(status);
	unsigned int col = KGET_COLUMN(status);
	unsigned int code = MATRIX_SCAN_CODE(row, col, W90P910_ROW_SHIFT);
	unsigned int key = keypad->keymap[code];

	input_event(input_dev, EV_MSC, MSC_SCAN, code);
	input_report_key(input_dev, key, 1);
	input_sync(input_dev);

	input_event(input_dev, EV_MSC, MSC_SCAN, code);
	input_report_key(input_dev, key, 0);
	input_sync(input_dev);
	}

	static irqreturn_t w90p910_keypad_irq_handler(int irq, void *dev_id)
	{
	struct w90p910_keypad *keypad = dev_id;
	unsigned int kstatus, val;

	kstatus = __raw_readl(keypad->mmio_base + KPI_STATUS);

	val = INTTR \| IS1KEY;

	if (kstatus & val)
	w90p910_keypad_scan_matrix(keypad, kstatus);

	return IRQ_HANDLED;
	}

	static int w90p910_keypad_open(struct input_dev *dev)
	{
	struct w90p910_keypad *keypad = input_get_drvdata(dev);
	const struct w90p910_keypad_platform_data *pdata = keypad->pdata;
	unsigned int val, config;

	/* Enable unit clock */
	clk_enable(keypad->clk);

	val = __raw_readl(keypad->mmio_base + KPI_CONF);
	val \|= (KPSEL \| ENKP);
	val &= ~(KSIZE0 \| KSIZE1);

	config = pdata->prescale \| (pdata->debounce << DEBOUNCE_BIT);

	val \|= config;

	__raw_writel(val, keypad->mmio_base + KPI_CONF);

	return 0;
	}

	static void w90p910_keypad_close(struct input_dev *dev)
	{
	struct w90p910_keypad *keypad = input_get_drvdata(dev);

	/* Disable clock unit */
	clk_disable(keypad->clk);
	}

	static int w90p910_keypad_probe(struct platform_device *pdev)
	{
	const struct w90p910_keypad_platform_data *pdata =
	dev_get_platdata(&pdev->dev);
	const struct matrix_keymap_data *keymap_data;
	struct w90p910_keypad *keypad;
	struct input_dev *input_dev;
	struct resource *res;
	int irq;
	int error;

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

	keymap_data = pdata->keymap_data;

	irq = platform_get_irq(pdev, 0);
	if (irq < 0) {
	dev_err(&pdev->dev, "failed to get keypad irq\n");
	return -ENXIO;
	}

	keypad = kzalloc(sizeof(struct w90p910_keypad), GFP_KERNEL);
	input_dev = input_allocate_device();
	if (!keypad \|\| !input_dev) {
	dev_err(&pdev->dev, "failed to allocate driver data\n");
	error = -ENOMEM;
	goto failed_free;
	}

	keypad->pdata = pdata;
	keypad->input_dev = input_dev;
	keypad->irq = irq;

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (res == NULL) {
	dev_err(&pdev->dev, "failed to get I/O memory\n");
	error = -ENXIO;
	goto failed_free;
	}

	res = request_mem_region(res->start, resource_size(res), pdev->name);
	if (res == NULL) {
	dev_err(&pdev->dev, "failed to request I/O memory\n");
	error = -EBUSY;
	goto failed_free;
	}

	keypad->mmio_base = ioremap(res->start, resource_size(res));
	if (keypad->mmio_base == NULL) {
	dev_err(&pdev->dev, "failed to remap I/O memory\n");
	error = -ENXIO;
	goto failed_free_res;
	}

	keypad->clk = clk_get(&pdev->dev, NULL);
	if (IS_ERR(keypad->clk)) {
	dev_err(&pdev->dev, "failed to get keypad clock\n");
	error = PTR_ERR(keypad->clk);
	goto failed_free_io;
	}

	/* set multi-function pin for w90p910 kpi. */
	mfp_set_groupi(&pdev->dev);

	input_dev->name = pdev->name;
	input_dev->id.bustype = BUS_HOST;
	input_dev->open = w90p910_keypad_open;
	input_dev->close = w90p910_keypad_close;
	input_dev->dev.parent = &pdev->dev;

	error = matrix_keypad_build_keymap(keymap_data, NULL,
	W90P910_NUM_ROWS, W90P910_NUM_COLS,
	keypad->keymap, input_dev);
	if (error) {
	dev_err(&pdev->dev, "failed to build keymap\n");
	goto failed_put_clk;
	}

	error = request_irq(keypad->irq, w90p910_keypad_irq_handler,
	0, pdev->name, keypad);
	if (error) {
	dev_err(&pdev->dev, "failed to request IRQ\n");
	goto failed_put_clk;
	}

	__set_bit(EV_REP, input_dev->evbit);
	input_set_capability(input_dev, EV_MSC, MSC_SCAN);
	input_set_drvdata(input_dev, keypad);

	/* Register the input device */
	error = input_register_device(input_dev);
	if (error) {
	dev_err(&pdev->dev, "failed to register input device\n");
	goto failed_free_irq;
	}

	platform_set_drvdata(pdev, keypad);
	return 0;

	failed_free_irq:
	free_irq(irq, keypad);
	failed_put_clk:
	clk_put(keypad->clk);
	failed_free_io:
	iounmap(keypad->mmio_base);
	failed_free_res:
	release_mem_region(res->start, resource_size(res));
	failed_free:
	input_free_device(input_dev);
	kfree(keypad);
	return error;
	}

	static int w90p910_keypad_remove(struct platform_device *pdev)
	{
	struct w90p910_keypad *keypad = platform_get_drvdata(pdev);
	struct resource *res;

	free_irq(keypad->irq, keypad);

	clk_put(keypad->clk);

	input_unregister_device(keypad->input_dev);

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

	kfree(keypad);

	return 0;
	}

	static struct platform_driver w90p910_keypad_driver = {
	.probe = w90p910_keypad_probe,
	.remove = w90p910_keypad_remove,
	.driver = {
	.name = "nuc900-kpi",
	},
	};
	module_platform_driver(w90p910_keypad_driver);

	MODULE_AUTHOR("Wan ZongShun <mcuos.com@gmail.com>");
	MODULE_DESCRIPTION("w90p910 keypad driver");
	MODULE_LICENSE("GPL");
	MODULE_ALIAS("platform:nuc900-keypad");