[linux-2.6-block.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/clk.h>
#include <linux/io.h>

#define KYCR1_OFFS   0x00
#define KYCR2_OFFS   0x04
#define KYINDR_OFFS  0x08
#define KYOUTDR_OFFS 0x0c

#define KYCR2_IRQ_LEVEL    0x10
#define KYCR2_IRQ_DISABLED 0x00

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 },
};

struct sh_keysc_priv {
	void __iomem *iomem_base;
	struct clk *clk;
	unsigned long last_keys;
	struct input_dev *input;
	struct sh_keysc_info pdata;
};

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;
	unsigned long keys, keys1, keys0, mask;
	unsigned char keyin_set, tmp;
	int i, k;

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

	keys1 = ~0;
	keys0 = 0;

	do {
		keys = 0;
		keyin_set = 0;

		iowrite16(KYCR2_IRQ_DISABLED, priv->iomem_base + KYCR2_OFFS);

		for (i = 0; i < sh_keysc_mode[pdata->mode].keyout; i++) {
			iowrite16(0xfff ^ (3 << (i * 2)),
				  priv->iomem_base + KYOUTDR_OFFS);
			udelay(pdata->delay);
			tmp = ioread16(priv->iomem_base + KYINDR_OFFS);
			keys |= tmp << (sh_keysc_mode[pdata->mode].keyin * i);
			tmp ^= (1 << sh_keysc_mode[pdata->mode].keyin) - 1;
			keyin_set |= tmp;
		}

		iowrite16(0, priv->iomem_base + KYOUTDR_OFFS);
		iowrite16(KYCR2_IRQ_LEVEL | (keyin_set << 8),
			  priv->iomem_base + KYCR2_OFFS);

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

		keys ^= ~0;
		keys &= (1 << (sh_keysc_mode[pdata->mode].keyin *
			       sh_keysc_mode[pdata->mode].keyout)) - 1;
		keys1 &= keys;
		keys0 |= keys;

		dev_dbg(&pdev->dev, "keys 0x%08lx\n", keys);

	} while (ioread16(priv->iomem_base + KYCR2_OFFS) & 0x01);

	dev_dbg(&pdev->dev, "last_keys 0x%08lx keys0 0x%08lx keys1 0x%08lx\n",
		priv->last_keys, keys0, keys1);

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

		mask = 1 << i;

		if (!((priv->last_keys ^ keys0) & mask))
			continue;

		if ((keys1 | keys0) & mask) {
			input_event(priv->input, EV_KEY, k, 1);
			priv->last_keys |= mask;
		}

		if (!(keys1 & mask)) {
			input_event(priv->input, EV_KEY, k, 0);
			priv->last_keys &= ~mask;
		}

	}
	input_sync(priv->input);

	return IRQ_HANDLED;
}

#define res_size(res) ((res)->end - (res)->start + 1)

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, res_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);

	iowrite16((sh_keysc_mode[pdata->mode].kymd << 8) |
		  pdata->scan_timing, priv->iomem_base + KYCR1_OFFS);
	iowrite16(0, priv->iomem_base + KYOUTDR_OFFS);
	iowrite16(KYCR2_IRQ_LEVEL, priv->iomem_base + KYCR2_OFFS);

	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);

	iowrite16(KYCR2_IRQ_DISABLED, priv->iomem_base + KYCR2_OFFS);

	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 = ioread16(priv->iomem_base + KYCR1_OFFS);

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

	iowrite16(value, priv->iomem_base + KYCR1_OFFS);

	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 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>
090d951b	22	#include <linux/clk.h>
795e6bf3	23	#include <linux/io.h>
795e6bf3 MD	24
	25	#define KYCR1_OFFS 0x00
	26	#define KYCR2_OFFS 0x04
	27	#define KYINDR_OFFS 0x08
	28	#define KYOUTDR_OFFS 0x0c
	29
	30	#define KYCR2_IRQ_LEVEL 0x10
	31	#define KYCR2_IRQ_DISABLED 0x00
	32
	33	static const struct {
	34	unsigned char kymd, keyout, keyin;
	35	} sh_keysc_mode[] = {
	36	[SH_KEYSC_MODE_1] = { 0, 6, 5 },
	37	[SH_KEYSC_MODE_2] = { 1, 5, 6 },
	38	[SH_KEYSC_MODE_3] = { 2, 4, 7 },
	39	};
	40
	41	struct sh_keysc_priv {
	42	void __iomem *iomem_base;
090d951b	43	struct clk *clk;
795e6bf3 MD	44	unsigned long last_keys;
	45	struct input_dev *input;
	46	struct sh_keysc_info pdata;
	47	};
	48
	49	static irqreturn_t sh_keysc_isr(int irq, void *dev_id)
	50	{
	51	struct platform_device *pdev = dev_id;
	52	struct sh_keysc_priv *priv = platform_get_drvdata(pdev);
	53	struct sh_keysc_info *pdata = &priv->pdata;
	54	unsigned long keys, keys1, keys0, mask;
	55	unsigned char keyin_set, tmp;
	56	int i, k;
	57
	58	dev_dbg(&pdev->dev, "isr!\n");
	59
	60	keys1 = ~0;
	61	keys0 = 0;
	62
	63	do {
	64	keys = 0;
	65	keyin_set = 0;
	66
	67	iowrite16(KYCR2_IRQ_DISABLED, priv->iomem_base + KYCR2_OFFS);
	68
	69	for (i = 0; i < sh_keysc_mode[pdata->mode].keyout; i++) {
	70	iowrite16(0xfff ^ (3 << (i * 2)),
	71	priv->iomem_base + KYOUTDR_OFFS);
	72	udelay(pdata->delay);
	73	tmp = ioread16(priv->iomem_base + KYINDR_OFFS);
	74	keys \|= tmp << (sh_keysc_mode[pdata->mode].keyin * i);
	75	tmp ^= (1 << sh_keysc_mode[pdata->mode].keyin) - 1;
	76	keyin_set \|= tmp;
	77	}
	78
	79	iowrite16(0, priv->iomem_base + KYOUTDR_OFFS);
	80	iowrite16(KYCR2_IRQ_LEVEL \| (keyin_set << 8),
	81	priv->iomem_base + KYCR2_OFFS);
	82
1f85d381 KM	83	if (pdata->kycr2_delay)
	84	udelay(pdata->kycr2_delay);
	85
795e6bf3 MD	86	keys ^= ~0;
	87	keys &= (1 << (sh_keysc_mode[pdata->mode].keyin *
	88	sh_keysc_mode[pdata->mode].keyout)) - 1;
	89	keys1 &= keys;
	90	keys0 \|= keys;
	91
	92	dev_dbg(&pdev->dev, "keys 0x%08lx\n", keys);
	93
	94	} while (ioread16(priv->iomem_base + KYCR2_OFFS) & 0x01);
	95
	96	dev_dbg(&pdev->dev, "last_keys 0x%08lx keys0 0x%08lx keys1 0x%08lx\n",
	97	priv->last_keys, keys0, keys1);
	98
	99	for (i = 0; i < SH_KEYSC_MAXKEYS; i++) {
	100	k = pdata->keycodes[i];
	101	if (!k)
	102	continue;
	103
	104	mask = 1 << i;
	105
	106	if (!((priv->last_keys ^ keys0) & mask))
	107	continue;
	108
	109	if ((keys1 \| keys0) & mask) {
	110	input_event(priv->input, EV_KEY, k, 1);
	111	priv->last_keys \|= mask;
	112	}
	113
	114	if (!(keys1 & mask)) {
	115	input_event(priv->input, EV_KEY, k, 0);
	116	priv->last_keys &= ~mask;
	117	}
	118
	119	}
	120	input_sync(priv->input);
	121
	122	return IRQ_HANDLED;
	123	}
	124
	125	#define res_size(res) ((res)->end - (res)->start + 1)
	126
	127	static int __devinit sh_keysc_probe(struct platform_device *pdev)
	128	{
	129	struct sh_keysc_priv *priv;
	130	struct sh_keysc_info *pdata;
	131	struct resource *res;
	132	struct input_dev *input;
090d951b	133	char clk_name[8];
24d01c06	134	int i;
795e6bf3 MD	135	int irq, error;
	136
	137	if (!pdev->dev.platform_data) {
	138	dev_err(&pdev->dev, "no platform data defined\n");
	139	error = -EINVAL;
	140	goto err0;
	141	}
	142
	143	error = -ENXIO;
	144	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	145	if (res == NULL) {
	146	dev_err(&pdev->dev, "failed to get I/O memory\n");
	147	goto err0;
	148	}
	149
	150	irq = platform_get_irq(pdev, 0);
	151	if (irq < 0) {
	152	dev_err(&pdev->dev, "failed to get irq\n");
	153	goto err0;
	154	}
	155
	156	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
	157	if (priv == NULL) {
	158	dev_err(&pdev->dev, "failed to allocate driver data\n");
	159	error = -ENOMEM;
	160	goto err0;
	161	}
	162
	163	platform_set_drvdata(pdev, priv);
	164	memcpy(&priv->pdata, pdev->dev.platform_data, sizeof(priv->pdata));
	165	pdata = &priv->pdata;
	166
795e6bf3 MD	167	priv->iomem_base = ioremap_nocache(res->start, res_size(res));
	168	if (priv->iomem_base == NULL) {
	169	dev_err(&pdev->dev, "failed to remap I/O memory\n");
	170	error = -ENXIO;
d3aa43a9	171	goto err1;
795e6bf3 MD	172	}
795e6bf3 MD	173
090d951b MD	174	snprintf(clk_name, sizeof(clk_name), "keysc%d", pdev->id);
	175	priv->clk = clk_get(&pdev->dev, clk_name);
	176	if (IS_ERR(priv->clk)) {
	177	dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name);
	178	error = PTR_ERR(priv->clk);
	179	goto err2;
	180	}
	181
795e6bf3 MD	182	priv->input = input_allocate_device();
	183	if (!priv->input) {
	184	dev_err(&pdev->dev, "failed to allocate input device\n");
	185	error = -ENOMEM;
090d951b	186	goto err3;
795e6bf3 MD	187	}
	188
	189	input = priv->input;
	190	input->evbit[0] = BIT_MASK(EV_KEY);
	191
	192	input->name = pdev->name;
	193	input->phys = "sh-keysc-keys/input0";
	194	input->dev.parent = &pdev->dev;
	195
	196	input->id.bustype = BUS_HOST;
	197	input->id.vendor = 0x0001;
	198	input->id.product = 0x0001;
	199	input->id.version = 0x0100;
	200
24d01c06 DT	201	input->keycode = pdata->keycodes;
	202	input->keycodesize = sizeof(pdata->keycodes[0]);
	203	input->keycodemax = ARRAY_SIZE(pdata->keycodes);
	204
795e6bf3 MD	205	error = request_irq(irq, sh_keysc_isr, 0, pdev->name, pdev);
	206	if (error) {
	207	dev_err(&pdev->dev, "failed to request IRQ\n");
090d951b	208	goto err4;
795e6bf3 MD	209	}
795e6bf3 MD	210
24d01c06 DT	211	for (i = 0; i < SH_KEYSC_MAXKEYS; i++)
	212	__set_bit(pdata->keycodes[i], input->keybit);
	213	__clear_bit(KEY_RESERVED, input->keybit);
795e6bf3 MD	214
	215	error = input_register_device(input);
	216	if (error) {
	217	dev_err(&pdev->dev, "failed to register input device\n");
090d951b	218	goto err5;
795e6bf3 MD	219	}
795e6bf3 MD	220
090d951b MD	221	clk_enable(priv->clk);
090d951b MD	222
795e6bf3 MD	223	iowrite16((sh_keysc_mode[pdata->mode].kymd << 8) \|
	224	pdata->scan_timing, priv->iomem_base + KYCR1_OFFS);
	225	iowrite16(0, priv->iomem_base + KYOUTDR_OFFS);
	226	iowrite16(KYCR2_IRQ_LEVEL, priv->iomem_base + KYCR2_OFFS);
a29b99ec MD	227
a29b99ec MD	228	device_init_wakeup(&pdev->dev, 1);
24d01c06	229
795e6bf3	230	return 0;
24d01c06	231
090d951b	232	err5:
d3aa43a9	233	free_irq(irq, pdev);
090d951b	234	err4:
d3aa43a9	235	input_free_device(input);
090d951b MD	236	err3:
090d951b MD	237	clk_put(priv->clk);
795e6bf3	238	err2:
d3aa43a9	239	iounmap(priv->iomem_base);
795e6bf3 MD	240	err1:
	241	platform_set_drvdata(pdev, NULL);
	242	kfree(priv);
	243	err0:
	244	return error;
	245	}
	246
	247	static int __devexit sh_keysc_remove(struct platform_device *pdev)
	248	{
	249	struct sh_keysc_priv *priv = platform_get_drvdata(pdev);
795e6bf3 MD	250
	251	iowrite16(KYCR2_IRQ_DISABLED, priv->iomem_base + KYCR2_OFFS);
	252
	253	input_unregister_device(priv->input);
	254	free_irq(platform_get_irq(pdev, 0), pdev);
795e6bf3 MD	255	iounmap(priv->iomem_base);
795e6bf3 MD	256
090d951b MD	257	clk_disable(priv->clk);
	258	clk_put(priv->clk);
	259
795e6bf3 MD	260	platform_set_drvdata(pdev, NULL);
795e6bf3 MD	261	kfree(priv);
24d01c06	262
795e6bf3 MD	263	return 0;
	264	}
	265
a29b99ec MD	266	static int sh_keysc_suspend(struct device *dev)
a29b99ec MD	267	{
49976927 MD	268	struct platform_device *pdev = to_platform_device(dev);
49976927 MD	269	struct sh_keysc_priv *priv = platform_get_drvdata(pdev);
4ba50df6	270	int irq = platform_get_irq(pdev, 0);
a29b99ec MD	271	unsigned short value;
a29b99ec MD	272
a29b99ec	273	value = ioread16(priv->iomem_base + KYCR1_OFFS);
795e6bf3	274
4ba50df6	275	if (device_may_wakeup(dev)) {
a29b99ec	276	value \|= 0x80;
4ba50df6	277	enable_irq_wake(irq);
24d01c06	278	} else {
a29b99ec	279	value &= ~0x80;
24d01c06	280	}
a29b99ec MD	281
a29b99ec MD	282	iowrite16(value, priv->iomem_base + KYCR1_OFFS);
24d01c06	283
a29b99ec MD	284	return 0;
	285	}
	286
4ba50df6 MD	287	static int sh_keysc_resume(struct device *dev)
	288	{
	289	struct platform_device *pdev = to_platform_device(dev);
	290	int irq = platform_get_irq(pdev, 0);
	291
	292	if (device_may_wakeup(dev))
	293	disable_irq_wake(irq);
	294
	295	return 0;
	296	}
	297
a29b99ec MD	298	static struct dev_pm_ops sh_keysc_dev_pm_ops = {
a29b99ec MD	299	.suspend = sh_keysc_suspend,
4ba50df6	300	.resume = sh_keysc_resume,
a29b99ec	301	};
795e6bf3 MD	302
	303	struct platform_driver sh_keysc_device_driver = {
	304	.probe = sh_keysc_probe,
	305	.remove = __devexit_p(sh_keysc_remove),
795e6bf3 MD	306	.driver = {
795e6bf3 MD	307	.name = "sh_keysc",
a29b99ec	308	.pm = &sh_keysc_dev_pm_ops,
795e6bf3 MD	309	}
	310	};
	311
	312	static int __init sh_keysc_init(void)
	313	{
	314	return platform_driver_register(&sh_keysc_device_driver);
	315	}
	316
	317	static void __exit sh_keysc_exit(void)
	318	{
	319	platform_driver_unregister(&sh_keysc_device_driver);
	320	}
	321
	322	module_init(sh_keysc_init);
	323	module_exit(sh_keysc_exit);
	324
	325	MODULE_AUTHOR("Magnus Damm");
	326	MODULE_DESCRIPTION("SuperH KEYSC Keypad Driver");
	327	MODULE_LICENSE("GPL");