[net-next-2.6.git] / drivers / input / keyboard / sh_keysc.c

/*
 * SuperH KEYSC Keypad Driver
 *
 * Copyright (C) 2008 Magnus Damm
 *
 * Based on gpio_keys.c, Copyright 2005 Phil Blundell
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/input.h>
#include <linux/input/sh_keysc.h>
#include <linux/bitmap.h>
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/slab.h>

static const struct {
	unsigned char kymd, keyout, keyin;
} sh_keysc_mode[] = {
	[SH_KEYSC_MODE_1] = { 0, 6, 5 },
	[SH_KEYSC_MODE_2] = { 1, 5, 6 },
	[SH_KEYSC_MODE_3] = { 2, 4, 7 },
	[SH_KEYSC_MODE_4] = { 3, 6, 6 },
	[SH_KEYSC_MODE_5] = { 4, 6, 7 },
	[SH_KEYSC_MODE_6] = { 5, 7, 7 },
};

struct sh_keysc_priv {
	void __iomem *iomem_base;
	struct clk *clk;
	DECLARE_BITMAP(last_keys, SH_KEYSC_MAXKEYS);
	struct input_dev *input;
	struct sh_keysc_info pdata;
};

#define KYCR1 0
#define KYCR2 1
#define KYINDR 2
#define KYOUTDR 3

#define KYCR2_IRQ_LEVEL    0x10
#define KYCR2_IRQ_DISABLED 0x00

static unsigned long sh_keysc_read(struct sh_keysc_priv *p, int reg_nr)
{
	return ioread16(p->iomem_base + (reg_nr << 2));
}

static void sh_keysc_write(struct sh_keysc_priv *p, int reg_nr,
			   unsigned long value)
{
	iowrite16(value, p->iomem_base + (reg_nr << 2));
}

static void sh_keysc_level_mode(struct sh_keysc_priv *p,
				unsigned long keys_set)
{
	struct sh_keysc_info *pdata = &p->pdata;

	sh_keysc_write(p, KYOUTDR, 0);
	sh_keysc_write(p, KYCR2, KYCR2_IRQ_LEVEL | (keys_set << 8));

	if (pdata->kycr2_delay)
		udelay(pdata->kycr2_delay);
}

static void sh_keysc_map_dbg(struct device *dev, unsigned long *map,
			     const char *str)
{
	int k;

	for (k = 0; k < BITS_TO_LONGS(SH_KEYSC_MAXKEYS); k++)
		dev_dbg(dev, "%s[%d] 0x%lx\n", str, k, map[k]);
}

static irqreturn_t sh_keysc_isr(int irq, void *dev_id)
{
	struct platform_device *pdev = dev_id;
	struct sh_keysc_priv *priv = platform_get_drvdata(pdev);
	struct sh_keysc_info *pdata = &priv->pdata;
	int keyout_nr = sh_keysc_mode[pdata->mode].keyout;
	int keyin_nr = sh_keysc_mode[pdata->mode].keyin;
	DECLARE_BITMAP(keys, SH_KEYSC_MAXKEYS);
	DECLARE_BITMAP(keys0, SH_KEYSC_MAXKEYS);
	DECLARE_BITMAP(keys1, SH_KEYSC_MAXKEYS);
	unsigned char keyin_set, tmp;
	int i, k, n;

	dev_dbg(&pdev->dev, "isr!\n");

	bitmap_fill(keys1, SH_KEYSC_MAXKEYS);
	bitmap_zero(keys0, SH_KEYSC_MAXKEYS);

	do {
		bitmap_zero(keys, SH_KEYSC_MAXKEYS);
		keyin_set = 0;

		sh_keysc_write(priv, KYCR2, KYCR2_IRQ_DISABLED);

		for (i = 0; i < keyout_nr; i++) {
			n = keyin_nr * i;

			/* drive one KEYOUT pin low, read KEYIN pins */
			sh_keysc_write(priv, KYOUTDR, 0xffff ^ (3 << (i * 2)));
			udelay(pdata->delay);
			tmp = sh_keysc_read(priv, KYINDR);

			/* set bit if key press has been detected */
			for (k = 0; k < keyin_nr; k++) {
				if (tmp & (1 << k))
					__set_bit(n + k, keys);
			}

			/* keep track of which KEYIN bits that have been set */
			keyin_set |= tmp ^ ((1 << keyin_nr) - 1);
		}

		sh_keysc_level_mode(priv, keyin_set);

		bitmap_complement(keys, keys, SH_KEYSC_MAXKEYS);
		bitmap_and(keys1, keys1, keys, SH_KEYSC_MAXKEYS);
		bitmap_or(keys0, keys0, keys, SH_KEYSC_MAXKEYS);

		sh_keysc_map_dbg(&pdev->dev, keys, "keys");

	} while (sh_keysc_read(priv, KYCR2) & 0x01);

	sh_keysc_map_dbg(&pdev->dev, priv->last_keys, "last_keys");
	sh_keysc_map_dbg(&pdev->dev, keys0, "keys0");
	sh_keysc_map_dbg(&pdev->dev, keys1, "keys1");

	for (i = 0; i < SH_KEYSC_MAXKEYS; i++) {
		k = pdata->keycodes[i];
		if (!k)
			continue;

		if (test_bit(i, keys0) == test_bit(i, priv->last_keys))
			continue;

		if (test_bit(i, keys1) || test_bit(i, keys0)) {
			input_event(priv->input, EV_KEY, k, 1);
			__set_bit(i, priv->last_keys);
		}

		if (!test_bit(i, keys1)) {
			input_event(priv->input, EV_KEY, k, 0);
			__clear_bit(i, priv->last_keys);
		}

	}
	input_sync(priv->input);

	return IRQ_HANDLED;
}

static int __devinit sh_keysc_probe(struct platform_device *pdev)
{
	struct sh_keysc_priv *priv;
	struct sh_keysc_info *pdata;
	struct resource *res;
	struct input_dev *input;
	char clk_name[8];
	int i;
	int irq, error;

	if (!pdev->dev.platform_data) {
		dev_err(&pdev->dev, "no platform data defined\n");
		error = -EINVAL;
		goto err0;
	}

	error = -ENXIO;
	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (res == NULL) {
		dev_err(&pdev->dev, "failed to get I/O memory\n");
		goto err0;
	}

	irq = platform_get_irq(pdev, 0);
	if (irq < 0) {
		dev_err(&pdev->dev, "failed to get irq\n");
		goto err0;
	}

	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
	if (priv == NULL) {
		dev_err(&pdev->dev, "failed to allocate driver data\n");
		error = -ENOMEM;
		goto err0;
	}

	platform_set_drvdata(pdev, priv);
	memcpy(&priv->pdata, pdev->dev.platform_data, sizeof(priv->pdata));
	pdata = &priv->pdata;

	priv->iomem_base = ioremap_nocache(res->start, resource_size(res));
	if (priv->iomem_base == NULL) {
		dev_err(&pdev->dev, "failed to remap I/O memory\n");
		error = -ENXIO;
		goto err1;
	}

	snprintf(clk_name, sizeof(clk_name), "keysc%d", pdev->id);
	priv->clk = clk_get(&pdev->dev, clk_name);
	if (IS_ERR(priv->clk)) {
		dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name);
		error = PTR_ERR(priv->clk);
		goto err2;
	}

	priv->input = input_allocate_device();
	if (!priv->input) {
		dev_err(&pdev->dev, "failed to allocate input device\n");
		error = -ENOMEM;
		goto err3;
	}

	input = priv->input;
	input->evbit[0] = BIT_MASK(EV_KEY);

	input->name = pdev->name;
	input->phys = "sh-keysc-keys/input0";
	input->dev.parent = &pdev->dev;

	input->id.bustype = BUS_HOST;
	input->id.vendor = 0x0001;
	input->id.product = 0x0001;
	input->id.version = 0x0100;

	input->keycode = pdata->keycodes;
	input->keycodesize = sizeof(pdata->keycodes[0]);
	input->keycodemax = ARRAY_SIZE(pdata->keycodes);

	error = request_irq(irq, sh_keysc_isr, 0, pdev->name, pdev);
	if (error) {
		dev_err(&pdev->dev, "failed to request IRQ\n");
		goto err4;
	}

	for (i = 0; i < SH_KEYSC_MAXKEYS; i++)
		__set_bit(pdata->keycodes[i], input->keybit);
	__clear_bit(KEY_RESERVED, input->keybit);

	error = input_register_device(input);
	if (error) {
		dev_err(&pdev->dev, "failed to register input device\n");
		goto err5;
	}

	clk_enable(priv->clk);

	sh_keysc_write(priv, KYCR1, (sh_keysc_mode[pdata->mode].kymd << 8) |
		       pdata->scan_timing);
	sh_keysc_level_mode(priv, 0);

	device_init_wakeup(&pdev->dev, 1);

	return 0;

 err5:
	free_irq(irq, pdev);
 err4:
	input_free_device(input);
 err3:
	clk_put(priv->clk);
 err2:
	iounmap(priv->iomem_base);
 err1:
	platform_set_drvdata(pdev, NULL);
	kfree(priv);
 err0:
	return error;
}

static int __devexit sh_keysc_remove(struct platform_device *pdev)
{
	struct sh_keysc_priv *priv = platform_get_drvdata(pdev);

	sh_keysc_write(priv, KYCR2, KYCR2_IRQ_DISABLED);

	input_unregister_device(priv->input);
	free_irq(platform_get_irq(pdev, 0), pdev);
	iounmap(priv->iomem_base);

	clk_disable(priv->clk);
	clk_put(priv->clk);

	platform_set_drvdata(pdev, NULL);
	kfree(priv);

	return 0;
}

static int sh_keysc_suspend(struct device *dev)
{
	struct platform_device *pdev = to_platform_device(dev);
	struct sh_keysc_priv *priv = platform_get_drvdata(pdev);
	int irq = platform_get_irq(pdev, 0);
	unsigned short value;

	value = sh_keysc_read(priv, KYCR1);

	if (device_may_wakeup(dev)) {
		value |= 0x80;
		enable_irq_wake(irq);
	} else {
		value &= ~0x80;
	}

	sh_keysc_write(priv, KYCR1, value);

	return 0;
}

static int sh_keysc_resume(struct device *dev)
{
	struct platform_device *pdev = to_platform_device(dev);
	int irq = platform_get_irq(pdev, 0);

	if (device_may_wakeup(dev))
		disable_irq_wake(irq);

	return 0;
}

static const struct dev_pm_ops sh_keysc_dev_pm_ops = {
	.suspend = sh_keysc_suspend,
	.resume = sh_keysc_resume,
};

struct platform_driver sh_keysc_device_driver = {
	.probe		= sh_keysc_probe,
	.remove		= __devexit_p(sh_keysc_remove),
	.driver		= {
		.name	= "sh_keysc",
		.pm	= &sh_keysc_dev_pm_ops,
	}
};

static int __init sh_keysc_init(void)
{
	return platform_driver_register(&sh_keysc_device_driver);
}

static void __exit sh_keysc_exit(void)
{
	platform_driver_unregister(&sh_keysc_device_driver);
}

module_init(sh_keysc_init);
module_exit(sh_keysc_exit);

MODULE_AUTHOR("Magnus Damm");
MODULE_DESCRIPTION("SuperH KEYSC Keypad Driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
795e6bf3 MD	1	/*
	2	* SuperH KEYSC Keypad Driver
	3	*
	4	* Copyright (C) 2008 Magnus Damm
	5	*
	6	* Based on gpio_keys.c, Copyright 2005 Phil Blundell
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License version 2 as
	10	* published by the Free Software Foundation.
	11	*/
	12
	13	#include <linux/kernel.h>
	14	#include <linux/module.h>
	15	#include <linux/init.h>
	16	#include <linux/interrupt.h>
	17	#include <linux/irq.h>
	18	#include <linux/delay.h>
	19	#include <linux/platform_device.h>
	20	#include <linux/input.h>
fc1d003d	21	#include <linux/input/sh_keysc.h>
324e5ade	22	#include <linux/bitmap.h>
090d951b	23	#include <linux/clk.h>
795e6bf3	24	#include <linux/io.h>
5a0e3ad6	25	#include <linux/slab.h>
795e6bf3	26
795e6bf3 MD	27	static const struct {
	28	unsigned char kymd, keyout, keyin;
	29	} sh_keysc_mode[] = {
	30	[SH_KEYSC_MODE_1] = { 0, 6, 5 },
	31	[SH_KEYSC_MODE_2] = { 1, 5, 6 },
	32	[SH_KEYSC_MODE_3] = { 2, 4, 7 },
3bf12763 MD	33	[SH_KEYSC_MODE_4] = { 3, 6, 6 },
3bf12763 MD	34	[SH_KEYSC_MODE_5] = { 4, 6, 7 },
8f8be243	35	[SH_KEYSC_MODE_6] = { 5, 7, 7 },
795e6bf3 MD	36	};
	37
	38	struct sh_keysc_priv {
	39	void __iomem *iomem_base;
090d951b	40	struct clk *clk;
324e5ade	41	DECLARE_BITMAP(last_keys, SH_KEYSC_MAXKEYS);
795e6bf3 MD	42	struct input_dev *input;
	43	struct sh_keysc_info pdata;
	44	};
	45
2b14a808 MD	46	#define KYCR1 0
	47	#define KYCR2 1
	48	#define KYINDR 2
	49	#define KYOUTDR 3
	50
	51	#define KYCR2_IRQ_LEVEL 0x10
	52	#define KYCR2_IRQ_DISABLED 0x00
	53
	54	static unsigned long sh_keysc_read(struct sh_keysc_priv *p, int reg_nr)
	55	{
	56	return ioread16(p->iomem_base + (reg_nr << 2));
	57	}
	58
	59	static void sh_keysc_write(struct sh_keysc_priv *p, int reg_nr,
	60	unsigned long value)
	61	{
	62	iowrite16(value, p->iomem_base + (reg_nr << 2));
	63	}
	64
	65	static void sh_keysc_level_mode(struct sh_keysc_priv *p,
	66	unsigned long keys_set)
	67	{
	68	struct sh_keysc_info *pdata = &p->pdata;
	69
	70	sh_keysc_write(p, KYOUTDR, 0);
	71	sh_keysc_write(p, KYCR2, KYCR2_IRQ_LEVEL \| (keys_set << 8));
	72
	73	if (pdata->kycr2_delay)
	74	udelay(pdata->kycr2_delay);
	75	}
	76
324e5ade MD	77	static void sh_keysc_map_dbg(struct device dev, unsigned long map,
	78	const char *str)
	79	{
	80	int k;
	81
	82	for (k = 0; k < BITS_TO_LONGS(SH_KEYSC_MAXKEYS); k++)
	83	dev_dbg(dev, "%s[%d] 0x%lx\n", str, k, map[k]);
	84	}
	85
795e6bf3 MD	86	static irqreturn_t sh_keysc_isr(int irq, void *dev_id)
	87	{
	88	struct platform_device *pdev = dev_id;
	89	struct sh_keysc_priv *priv = platform_get_drvdata(pdev);
	90	struct sh_keysc_info *pdata = &priv->pdata;
324e5ade MD	91	int keyout_nr = sh_keysc_mode[pdata->mode].keyout;
	92	int keyin_nr = sh_keysc_mode[pdata->mode].keyin;
	93	DECLARE_BITMAP(keys, SH_KEYSC_MAXKEYS);
	94	DECLARE_BITMAP(keys0, SH_KEYSC_MAXKEYS);
	95	DECLARE_BITMAP(keys1, SH_KEYSC_MAXKEYS);
795e6bf3	96	unsigned char keyin_set, tmp;
324e5ade	97	int i, k, n;
795e6bf3 MD	98
	99	dev_dbg(&pdev->dev, "isr!\n");
	100
324e5ade MD	101	bitmap_fill(keys1, SH_KEYSC_MAXKEYS);
324e5ade MD	102	bitmap_zero(keys0, SH_KEYSC_MAXKEYS);
795e6bf3 MD	103
795e6bf3 MD	104	do {
324e5ade	105	bitmap_zero(keys, SH_KEYSC_MAXKEYS);
795e6bf3 MD	106	keyin_set = 0;
795e6bf3 MD	107
2b14a808	108	sh_keysc_write(priv, KYCR2, KYCR2_IRQ_DISABLED);
795e6bf3	109
324e5ade MD	110	for (i = 0; i < keyout_nr; i++) {
	111	n = keyin_nr * i;
	112
	113	/* drive one KEYOUT pin low, read KEYIN pins */
8f8be243	114	sh_keysc_write(priv, KYOUTDR, 0xffff ^ (3 << (i * 2)));
795e6bf3	115	udelay(pdata->delay);
2b14a808 MD	116	tmp = sh_keysc_read(priv, KYINDR);
2b14a808 MD	117
324e5ade MD	118	/* set bit if key press has been detected */
	119	for (k = 0; k < keyin_nr; k++) {
	120	if (tmp & (1 << k))
	121	__set_bit(n + k, keys);
	122	}
	123
	124	/* keep track of which KEYIN bits that have been set */
	125	keyin_set \|= tmp ^ ((1 << keyin_nr) - 1);
795e6bf3 MD	126	}
795e6bf3 MD	127
2b14a808	128	sh_keysc_level_mode(priv, keyin_set);
1f85d381	129
324e5ade MD	130	bitmap_complement(keys, keys, SH_KEYSC_MAXKEYS);
	131	bitmap_and(keys1, keys1, keys, SH_KEYSC_MAXKEYS);
	132	bitmap_or(keys0, keys0, keys, SH_KEYSC_MAXKEYS);
795e6bf3	133
324e5ade	134	sh_keysc_map_dbg(&pdev->dev, keys, "keys");
795e6bf3	135
2b14a808	136	} while (sh_keysc_read(priv, KYCR2) & 0x01);
795e6bf3	137
324e5ade MD	138	sh_keysc_map_dbg(&pdev->dev, priv->last_keys, "last_keys");
	139	sh_keysc_map_dbg(&pdev->dev, keys0, "keys0");
	140	sh_keysc_map_dbg(&pdev->dev, keys1, "keys1");
795e6bf3 MD	141
	142	for (i = 0; i < SH_KEYSC_MAXKEYS; i++) {
	143	k = pdata->keycodes[i];
	144	if (!k)
	145	continue;
	146
324e5ade	147	if (test_bit(i, keys0) == test_bit(i, priv->last_keys))
795e6bf3 MD	148	continue;
795e6bf3 MD	149
324e5ade	150	if (test_bit(i, keys1) \|\| test_bit(i, keys0)) {
795e6bf3	151	input_event(priv->input, EV_KEY, k, 1);
324e5ade	152	__set_bit(i, priv->last_keys);
795e6bf3 MD	153	}
795e6bf3 MD	154
324e5ade	155	if (!test_bit(i, keys1)) {
795e6bf3	156	input_event(priv->input, EV_KEY, k, 0);
324e5ade	157	__clear_bit(i, priv->last_keys);
795e6bf3 MD	158	}
	159
	160	}
	161	input_sync(priv->input);
	162
	163	return IRQ_HANDLED;
	164	}
	165
795e6bf3 MD	166	static int __devinit sh_keysc_probe(struct platform_device *pdev)
	167	{
	168	struct sh_keysc_priv *priv;
	169	struct sh_keysc_info *pdata;
	170	struct resource *res;
	171	struct input_dev *input;
090d951b	172	char clk_name[8];
24d01c06	173	int i;
795e6bf3 MD	174	int irq, error;
	175
	176	if (!pdev->dev.platform_data) {
	177	dev_err(&pdev->dev, "no platform data defined\n");
	178	error = -EINVAL;
	179	goto err0;
	180	}
	181
	182	error = -ENXIO;
	183	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	184	if (res == NULL) {
	185	dev_err(&pdev->dev, "failed to get I/O memory\n");
	186	goto err0;
	187	}
	188
	189	irq = platform_get_irq(pdev, 0);
	190	if (irq < 0) {
	191	dev_err(&pdev->dev, "failed to get irq\n");
	192	goto err0;
	193	}
	194
	195	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
	196	if (priv == NULL) {
	197	dev_err(&pdev->dev, "failed to allocate driver data\n");
	198	error = -ENOMEM;
	199	goto err0;
	200	}
	201
	202	platform_set_drvdata(pdev, priv);
	203	memcpy(&priv->pdata, pdev->dev.platform_data, sizeof(priv->pdata));
	204	pdata = &priv->pdata;
	205
3bf12763	206	priv->iomem_base = ioremap_nocache(res->start, resource_size(res));
795e6bf3 MD	207	if (priv->iomem_base == NULL) {
	208	dev_err(&pdev->dev, "failed to remap I/O memory\n");
	209	error = -ENXIO;
d3aa43a9	210	goto err1;
795e6bf3 MD	211	}
795e6bf3 MD	212
090d951b MD	213	snprintf(clk_name, sizeof(clk_name), "keysc%d", pdev->id);
	214	priv->clk = clk_get(&pdev->dev, clk_name);
	215	if (IS_ERR(priv->clk)) {
	216	dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name);
	217	error = PTR_ERR(priv->clk);
	218	goto err2;
	219	}
	220
795e6bf3 MD	221	priv->input = input_allocate_device();
	222	if (!priv->input) {
	223	dev_err(&pdev->dev, "failed to allocate input device\n");
	224	error = -ENOMEM;
090d951b	225	goto err3;
795e6bf3 MD	226	}
	227
	228	input = priv->input;
	229	input->evbit[0] = BIT_MASK(EV_KEY);
	230
	231	input->name = pdev->name;
	232	input->phys = "sh-keysc-keys/input0";
	233	input->dev.parent = &pdev->dev;
	234
	235	input->id.bustype = BUS_HOST;
	236	input->id.vendor = 0x0001;
	237	input->id.product = 0x0001;
	238	input->id.version = 0x0100;
	239
24d01c06 DT	240	input->keycode = pdata->keycodes;
	241	input->keycodesize = sizeof(pdata->keycodes[0]);
	242	input->keycodemax = ARRAY_SIZE(pdata->keycodes);
	243
795e6bf3 MD	244	error = request_irq(irq, sh_keysc_isr, 0, pdev->name, pdev);
	245	if (error) {
	246	dev_err(&pdev->dev, "failed to request IRQ\n");
090d951b	247	goto err4;
795e6bf3 MD	248	}
795e6bf3 MD	249
24d01c06 DT	250	for (i = 0; i < SH_KEYSC_MAXKEYS; i++)
	251	__set_bit(pdata->keycodes[i], input->keybit);
	252	__clear_bit(KEY_RESERVED, input->keybit);
795e6bf3 MD	253
	254	error = input_register_device(input);
	255	if (error) {
	256	dev_err(&pdev->dev, "failed to register input device\n");
090d951b	257	goto err5;
795e6bf3 MD	258	}
795e6bf3 MD	259
090d951b MD	260	clk_enable(priv->clk);
090d951b MD	261
2b14a808 MD	262	sh_keysc_write(priv, KYCR1, (sh_keysc_mode[pdata->mode].kymd << 8) \|
	263	pdata->scan_timing);
	264	sh_keysc_level_mode(priv, 0);
a29b99ec MD	265
a29b99ec MD	266	device_init_wakeup(&pdev->dev, 1);
24d01c06	267
795e6bf3	268	return 0;
24d01c06	269
090d951b	270	err5:
d3aa43a9	271	free_irq(irq, pdev);
090d951b	272	err4:
d3aa43a9	273	input_free_device(input);
090d951b MD	274	err3:
090d951b MD	275	clk_put(priv->clk);
795e6bf3	276	err2:
d3aa43a9	277	iounmap(priv->iomem_base);
795e6bf3 MD	278	err1:
	279	platform_set_drvdata(pdev, NULL);
	280	kfree(priv);
	281	err0:
	282	return error;
	283	}
	284
	285	static int __devexit sh_keysc_remove(struct platform_device *pdev)
	286	{
	287	struct sh_keysc_priv *priv = platform_get_drvdata(pdev);
795e6bf3	288
2b14a808	289	sh_keysc_write(priv, KYCR2, KYCR2_IRQ_DISABLED);
795e6bf3 MD	290
	291	input_unregister_device(priv->input);
	292	free_irq(platform_get_irq(pdev, 0), pdev);
795e6bf3 MD	293	iounmap(priv->iomem_base);
795e6bf3 MD	294
090d951b MD	295	clk_disable(priv->clk);
	296	clk_put(priv->clk);
	297
795e6bf3 MD	298	platform_set_drvdata(pdev, NULL);
795e6bf3 MD	299	kfree(priv);
24d01c06	300
795e6bf3 MD	301	return 0;
	302	}
	303
a29b99ec MD	304	static int sh_keysc_suspend(struct device *dev)
a29b99ec MD	305	{
49976927 MD	306	struct platform_device *pdev = to_platform_device(dev);
49976927 MD	307	struct sh_keysc_priv *priv = platform_get_drvdata(pdev);
4ba50df6	308	int irq = platform_get_irq(pdev, 0);
a29b99ec MD	309	unsigned short value;
a29b99ec MD	310
2b14a808	311	value = sh_keysc_read(priv, KYCR1);
795e6bf3	312
4ba50df6	313	if (device_may_wakeup(dev)) {
a29b99ec	314	value \|= 0x80;
4ba50df6	315	enable_irq_wake(irq);
24d01c06	316	} else {
a29b99ec	317	value &= ~0x80;
24d01c06	318	}
a29b99ec	319
2b14a808	320	sh_keysc_write(priv, KYCR1, value);
24d01c06	321
a29b99ec MD	322	return 0;
	323	}
	324
4ba50df6 MD	325	static int sh_keysc_resume(struct device *dev)
	326	{
	327	struct platform_device *pdev = to_platform_device(dev);
	328	int irq = platform_get_irq(pdev, 0);
	329
	330	if (device_may_wakeup(dev))
	331	disable_irq_wake(irq);
	332
	333	return 0;
	334	}
	335
47145210	336	static const struct dev_pm_ops sh_keysc_dev_pm_ops = {
a29b99ec	337	.suspend = sh_keysc_suspend,
4ba50df6	338	.resume = sh_keysc_resume,
a29b99ec	339	};
795e6bf3 MD	340
	341	struct platform_driver sh_keysc_device_driver = {
	342	.probe = sh_keysc_probe,
	343	.remove = __devexit_p(sh_keysc_remove),
795e6bf3 MD	344	.driver = {
795e6bf3 MD	345	.name = "sh_keysc",
a29b99ec	346	.pm = &sh_keysc_dev_pm_ops,
795e6bf3 MD	347	}
	348	};
	349
	350	static int __init sh_keysc_init(void)
	351	{
	352	return platform_driver_register(&sh_keysc_device_driver);
	353	}
	354
	355	static void __exit sh_keysc_exit(void)
	356	{
	357	platform_driver_unregister(&sh_keysc_device_driver);
	358	}
	359
	360	module_init(sh_keysc_init);
	361	module_exit(sh_keysc_exit);
	362
	363	MODULE_AUTHOR("Magnus Damm");
	364	MODULE_DESCRIPTION("SuperH KEYSC Keypad Driver");
	365	MODULE_LICENSE("GPL");