[linux-2.6-block.git] / drivers / input / touchscreen / w90p910_ts.c

/*
 * Copyright (c) 2008 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/delay.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/clk.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/slab.h>

/* ADC controller bit defines */
#define ADC_DELAY	0xf00
#define ADC_DOWN	0x01
#define ADC_TSC_Y	(0x01 << 8)
#define ADC_TSC_X	(0x00 << 8)
#define TSC_FOURWIRE	(~(0x03 << 1))
#define ADC_CLK_EN	(0x01 << 28)	/* ADC clock enable */
#define ADC_READ_CON	(0x01 << 12)
#define ADC_CONV	(0x01 << 13)
#define ADC_SEMIAUTO	(0x01 << 14)
#define ADC_WAITTRIG	(0x03 << 14)
#define ADC_RST1	(0x01 << 16)
#define ADC_RST0	(0x00 << 16)
#define ADC_EN		(0x01 << 17)
#define ADC_INT		(0x01 << 18)
#define WT_INT		(0x01 << 20)
#define ADC_INT_EN	(0x01 << 21)
#define LVD_INT_EN	(0x01 << 22)
#define WT_INT_EN	(0x01 << 23)
#define ADC_DIV		(0x04 << 1)	/* div = 6 */

enum ts_state {
	TS_WAIT_NEW_PACKET,	/* We are waiting next touch report */
	TS_WAIT_X_COORD,	/* We are waiting for ADC to report X coord */
	TS_WAIT_Y_COORD,	/* We are waiting for ADC to report Y coord */
	TS_IDLE,		/* Input device is closed, don't do anything */
};

struct w90p910_ts {
	struct input_dev *input;
	struct timer_list timer;
	struct clk *clk;
	int irq_num;
	void __iomem *ts_reg;
	spinlock_t lock;
	enum ts_state state;
};

static void w90p910_report_event(struct w90p910_ts *w90p910_ts, bool down)
{
	struct input_dev *dev = w90p910_ts->input;

	if (down) {
		input_report_abs(dev, ABS_X,
				 __raw_readl(w90p910_ts->ts_reg + 0x0c));
		input_report_abs(dev, ABS_Y,
				 __raw_readl(w90p910_ts->ts_reg + 0x10));
	}

	input_report_key(dev, BTN_TOUCH, down);
	input_sync(dev);
}

static void w90p910_prepare_x_reading(struct w90p910_ts *w90p910_ts)
{
	unsigned long ctlreg;

	__raw_writel(ADC_TSC_X, w90p910_ts->ts_reg + 0x04);
	ctlreg = __raw_readl(w90p910_ts->ts_reg);
	ctlreg &= ~(ADC_WAITTRIG | WT_INT | WT_INT_EN);
	ctlreg |= ADC_SEMIAUTO | ADC_INT_EN | ADC_CONV;
	__raw_writel(ctlreg, w90p910_ts->ts_reg);

	w90p910_ts->state = TS_WAIT_X_COORD;
}

static void w90p910_prepare_y_reading(struct w90p910_ts *w90p910_ts)
{
	unsigned long ctlreg;

	__raw_writel(ADC_TSC_Y, w90p910_ts->ts_reg + 0x04);
	ctlreg = __raw_readl(w90p910_ts->ts_reg);
	ctlreg &= ~(ADC_WAITTRIG | ADC_INT | WT_INT_EN);
	ctlreg |= ADC_SEMIAUTO | ADC_INT_EN | ADC_CONV;
	__raw_writel(ctlreg, w90p910_ts->ts_reg);

	w90p910_ts->state = TS_WAIT_Y_COORD;
}

static void w90p910_prepare_next_packet(struct w90p910_ts *w90p910_ts)
{
	unsigned long ctlreg;

	ctlreg = __raw_readl(w90p910_ts->ts_reg);
	ctlreg &= ~(ADC_INT | ADC_INT_EN | ADC_SEMIAUTO | ADC_CONV);
	ctlreg |= ADC_WAITTRIG | WT_INT_EN;
	__raw_writel(ctlreg, w90p910_ts->ts_reg);

	w90p910_ts->state = TS_WAIT_NEW_PACKET;
}

static irqreturn_t w90p910_ts_interrupt(int irq, void *dev_id)
{
	struct w90p910_ts *w90p910_ts = dev_id;
	unsigned long flags;

	spin_lock_irqsave(&w90p910_ts->lock, flags);

	switch (w90p910_ts->state) {
	case TS_WAIT_NEW_PACKET:
		/*
		 * The controller only generates interrupts when pen
		 * is down.
		 */
		del_timer(&w90p910_ts->timer);
		w90p910_prepare_x_reading(w90p910_ts);
		break;


	case TS_WAIT_X_COORD:
		w90p910_prepare_y_reading(w90p910_ts);
		break;

	case TS_WAIT_Y_COORD:
		w90p910_report_event(w90p910_ts, true);
		w90p910_prepare_next_packet(w90p910_ts);
		mod_timer(&w90p910_ts->timer, jiffies + msecs_to_jiffies(100));
		break;

	case TS_IDLE:
		break;
	}

	spin_unlock_irqrestore(&w90p910_ts->lock, flags);

	return IRQ_HANDLED;
}

static void w90p910_check_pen_up(struct timer_list *t)
{
	struct w90p910_ts *w90p910_ts = from_timer(w90p910_ts, t, timer);
	unsigned long flags;

	spin_lock_irqsave(&w90p910_ts->lock, flags);

	if (w90p910_ts->state == TS_WAIT_NEW_PACKET &&
	    !(__raw_readl(w90p910_ts->ts_reg + 0x04) & ADC_DOWN)) {

		w90p910_report_event(w90p910_ts, false);
	}

	spin_unlock_irqrestore(&w90p910_ts->lock, flags);
}

static int w90p910_open(struct input_dev *dev)
{
	struct w90p910_ts *w90p910_ts = input_get_drvdata(dev);
	unsigned long val;

	/* enable the ADC clock */
	clk_enable(w90p910_ts->clk);

	__raw_writel(ADC_RST1, w90p910_ts->ts_reg);
	msleep(1);
	__raw_writel(ADC_RST0, w90p910_ts->ts_reg);
	msleep(1);

	/* set delay and screen type */
	val = __raw_readl(w90p910_ts->ts_reg + 0x04);
	__raw_writel(val & TSC_FOURWIRE, w90p910_ts->ts_reg + 0x04);
	__raw_writel(ADC_DELAY, w90p910_ts->ts_reg + 0x08);

	w90p910_ts->state = TS_WAIT_NEW_PACKET;
	wmb();

	/* set trigger mode */
	val = __raw_readl(w90p910_ts->ts_reg);
	val |= ADC_WAITTRIG | ADC_DIV | ADC_EN | WT_INT_EN;
	__raw_writel(val, w90p910_ts->ts_reg);

	return 0;
}

static void w90p910_close(struct input_dev *dev)
{
	struct w90p910_ts *w90p910_ts = input_get_drvdata(dev);
	unsigned long val;

	/* disable trigger mode */

	spin_lock_irq(&w90p910_ts->lock);

	w90p910_ts->state = TS_IDLE;

	val = __raw_readl(w90p910_ts->ts_reg);
	val &= ~(ADC_WAITTRIG | ADC_DIV | ADC_EN | WT_INT_EN | ADC_INT_EN);
	__raw_writel(val, w90p910_ts->ts_reg);

	spin_unlock_irq(&w90p910_ts->lock);

	/* Now that interrupts are shut off we can safely delete timer */
	del_timer_sync(&w90p910_ts->timer);

	/* stop the ADC clock */
	clk_disable(w90p910_ts->clk);
}

static int w90x900ts_probe(struct platform_device *pdev)
{
	struct w90p910_ts *w90p910_ts;
	struct input_dev *input_dev;
	struct resource *res;
	int err;

	w90p910_ts = kzalloc(sizeof(struct w90p910_ts), GFP_KERNEL);
	input_dev = input_allocate_device();
	if (!w90p910_ts || !input_dev) {
		err = -ENOMEM;
		goto fail1;
	}

	w90p910_ts->input = input_dev;
	w90p910_ts->state = TS_IDLE;
	spin_lock_init(&w90p910_ts->lock);
	timer_setup(&w90p910_ts->timer, w90p910_check_pen_up, 0);

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!res) {
		err = -ENXIO;
		goto fail1;
	}

	if (!request_mem_region(res->start, resource_size(res),
				pdev->name)) {
		err = -EBUSY;
		goto fail1;
	}

	w90p910_ts->ts_reg = ioremap(res->start, resource_size(res));
	if (!w90p910_ts->ts_reg) {
		err = -ENOMEM;
		goto fail2;
	}

	w90p910_ts->clk = clk_get(&pdev->dev, NULL);
	if (IS_ERR(w90p910_ts->clk)) {
		err = PTR_ERR(w90p910_ts->clk);
		goto fail3;
	}

	input_dev->name = "W90P910 TouchScreen";
	input_dev->phys = "w90p910ts/event0";
	input_dev->id.bustype = BUS_HOST;
	input_dev->id.vendor  = 0x0005;
	input_dev->id.product = 0x0001;
	input_dev->id.version = 0x0100;
	input_dev->dev.parent = &pdev->dev;
	input_dev->open = w90p910_open;
	input_dev->close = w90p910_close;

	input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
	input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);

	input_set_abs_params(input_dev, ABS_X, 0, 0x400, 0, 0);
	input_set_abs_params(input_dev, ABS_Y, 0, 0x400, 0, 0);

	input_set_drvdata(input_dev, w90p910_ts);

	w90p910_ts->irq_num = platform_get_irq(pdev, 0);
	if (request_irq(w90p910_ts->irq_num, w90p910_ts_interrupt,
			0, "w90p910ts", w90p910_ts)) {
		err = -EBUSY;
		goto fail4;
	}

	err = input_register_device(w90p910_ts->input);
	if (err)
		goto fail5;

	platform_set_drvdata(pdev, w90p910_ts);

	return 0;

fail5:	free_irq(w90p910_ts->irq_num, w90p910_ts);
fail4:	clk_put(w90p910_ts->clk);
fail3:	iounmap(w90p910_ts->ts_reg);
fail2:	release_mem_region(res->start, resource_size(res));
fail1:	input_free_device(input_dev);
	kfree(w90p910_ts);
	return err;
}

static int w90x900ts_remove(struct platform_device *pdev)
{
	struct w90p910_ts *w90p910_ts = platform_get_drvdata(pdev);
	struct resource *res;

	free_irq(w90p910_ts->irq_num, w90p910_ts);
	del_timer_sync(&w90p910_ts->timer);
	iounmap(w90p910_ts->ts_reg);

	clk_put(w90p910_ts->clk);

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

	input_unregister_device(w90p910_ts->input);
	kfree(w90p910_ts);

	return 0;
}

static struct platform_driver w90x900ts_driver = {
	.probe		= w90x900ts_probe,
	.remove		= w90x900ts_remove,
	.driver		= {
		.name	= "nuc900-ts",
	},
};
module_platform_driver(w90x900ts_driver);

MODULE_AUTHOR("Wan ZongShun <mcuos.com@gmail.com>");
MODULE_DESCRIPTION("w90p910 touch screen driver!");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:nuc900-ts");
Commit	Line	Data
7e3f7375 WZ	1	/*
	2	* Copyright (c) 2008 Nuvoton technology corporation.
	3	*
	4	* Wan ZongShun <mcuos.com@gmail.com>
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation;version 2 of the License.
	9	*
	10	*/
	11
	12	#include <linux/delay.h>
	13	#include <linux/module.h>
	14	#include <linux/platform_device.h>
	15	#include <linux/io.h>
b7788c5f	16	#include <linux/clk.h>
7e3f7375 WZ	17	#include <linux/input.h>
7e3f7375 WZ	18	#include <linux/interrupt.h>
5a0e3ad6	19	#include <linux/slab.h>
7e3f7375 WZ	20
	21	/* ADC controller bit defines */
	22	#define ADC_DELAY 0xf00
	23	#define ADC_DOWN 0x01
	24	#define ADC_TSC_Y (0x01 << 8)
	25	#define ADC_TSC_X (0x00 << 8)
	26	#define TSC_FOURWIRE (~(0x03 << 1))
	27	#define ADC_CLK_EN (0x01 << 28) /* ADC clock enable */
	28	#define ADC_READ_CON (0x01 << 12)
	29	#define ADC_CONV (0x01 << 13)
	30	#define ADC_SEMIAUTO (0x01 << 14)
	31	#define ADC_WAITTRIG (0x03 << 14)
	32	#define ADC_RST1 (0x01 << 16)
	33	#define ADC_RST0 (0x00 << 16)
	34	#define ADC_EN (0x01 << 17)
	35	#define ADC_INT (0x01 << 18)
	36	#define WT_INT (0x01 << 20)
	37	#define ADC_INT_EN (0x01 << 21)
	38	#define LVD_INT_EN (0x01 << 22)
	39	#define WT_INT_EN (0x01 << 23)
	40	#define ADC_DIV (0x04 << 1) /* div = 6 */
	41
	42	enum ts_state {
	43	TS_WAIT_NEW_PACKET, /* We are waiting next touch report */
	44	TS_WAIT_X_COORD, /* We are waiting for ADC to report X coord */
	45	TS_WAIT_Y_COORD, /* We are waiting for ADC to report Y coord */
	46	TS_IDLE, /* Input device is closed, don't do anything */
	47	};
	48
	49	struct w90p910_ts {
	50	struct input_dev *input;
	51	struct timer_list timer;
b7788c5f	52	struct clk *clk;
7e3f7375	53	int irq_num;
7e3f7375 WZ	54	void __iomem *ts_reg;
	55	spinlock_t lock;
	56	enum ts_state state;
	57	};
	58
	59	static void w90p910_report_event(struct w90p910_ts *w90p910_ts, bool down)
	60	{
	61	struct input_dev *dev = w90p910_ts->input;
	62
	63	if (down) {
	64	input_report_abs(dev, ABS_X,
	65	__raw_readl(w90p910_ts->ts_reg + 0x0c));
	66	input_report_abs(dev, ABS_Y,
	67	__raw_readl(w90p910_ts->ts_reg + 0x10));
	68	}
	69
	70	input_report_key(dev, BTN_TOUCH, down);
	71	input_sync(dev);
	72	}
	73
	74	static void w90p910_prepare_x_reading(struct w90p910_ts *w90p910_ts)
	75	{
	76	unsigned long ctlreg;
	77
	78	__raw_writel(ADC_TSC_X, w90p910_ts->ts_reg + 0x04);
	79	ctlreg = __raw_readl(w90p910_ts->ts_reg);
	80	ctlreg &= ~(ADC_WAITTRIG \| WT_INT \| WT_INT_EN);
	81	ctlreg \|= ADC_SEMIAUTO \| ADC_INT_EN \| ADC_CONV;
	82	__raw_writel(ctlreg, w90p910_ts->ts_reg);
	83
	84	w90p910_ts->state = TS_WAIT_X_COORD;
	85	}
	86
	87	static void w90p910_prepare_y_reading(struct w90p910_ts *w90p910_ts)
	88	{
	89	unsigned long ctlreg;
	90
	91	__raw_writel(ADC_TSC_Y, w90p910_ts->ts_reg + 0x04);
	92	ctlreg = __raw_readl(w90p910_ts->ts_reg);
	93	ctlreg &= ~(ADC_WAITTRIG \| ADC_INT \| WT_INT_EN);
	94	ctlreg \|= ADC_SEMIAUTO \| ADC_INT_EN \| ADC_CONV;
	95	__raw_writel(ctlreg, w90p910_ts->ts_reg);
	96
	97	w90p910_ts->state = TS_WAIT_Y_COORD;
	98	}
	99
	100	static void w90p910_prepare_next_packet(struct w90p910_ts *w90p910_ts)
	101	{
	102	unsigned long ctlreg;
	103
	104	ctlreg = __raw_readl(w90p910_ts->ts_reg);
	105	ctlreg &= ~(ADC_INT \| ADC_INT_EN \| ADC_SEMIAUTO \| ADC_CONV);
	106	ctlreg \|= ADC_WAITTRIG \| WT_INT_EN;
	107	__raw_writel(ctlreg, w90p910_ts->ts_reg);
	108
	109	w90p910_ts->state = TS_WAIT_NEW_PACKET;
	110	}
	111
	112	static irqreturn_t w90p910_ts_interrupt(int irq, void *dev_id)
	113	{
	114	struct w90p910_ts *w90p910_ts = dev_id;
	115	unsigned long flags;
	116
	117	spin_lock_irqsave(&w90p910_ts->lock, flags);
118
119	switch (w90p910_ts->state) {
120	case TS_WAIT_NEW_PACKET:
121	/*
122	* The controller only generates interrupts when pen
123	* is down.
124	*/
125	del_timer(&w90p910_ts->timer);
126	w90p910_prepare_x_reading(w90p910_ts);
127	break;
128
129
130	case TS_WAIT_X_COORD:
131	w90p910_prepare_y_reading(w90p910_ts);
132	break;
133
134	case TS_WAIT_Y_COORD:
135	w90p910_report_event(w90p910_ts, true);
136	w90p910_prepare_next_packet(w90p910_ts);
137	mod_timer(&w90p910_ts->timer, jiffies + msecs_to_jiffies(100));
138	break;
139
140	case TS_IDLE:
141	break;
142	}
143
144	spin_unlock_irqrestore(&w90p910_ts->lock, flags);
145
146	return IRQ_HANDLED;
147	}
148
ee03e3f0	149	static void w90p910_check_pen_up(struct timer_list *t)
7e3f7375	150	{
ee03e3f0	151	struct w90p910_ts *w90p910_ts = from_timer(w90p910_ts, t, timer);
7e3f7375 WZ	152	unsigned long flags;
	153
	154	spin_lock_irqsave(&w90p910_ts->lock, flags);
	155
	156	if (w90p910_ts->state == TS_WAIT_NEW_PACKET &&
	157	!(__raw_readl(w90p910_ts->ts_reg + 0x04) & ADC_DOWN)) {
	158
	159	w90p910_report_event(w90p910_ts, false);
	160	}
	161
	162	spin_unlock_irqrestore(&w90p910_ts->lock, flags);
	163	}
	164
	165	static int w90p910_open(struct input_dev *dev)
	166	{
	167	struct w90p910_ts *w90p910_ts = input_get_drvdata(dev);
	168	unsigned long val;
	169
	170	/* enable the ADC clock */
b7788c5f	171	clk_enable(w90p910_ts->clk);
7e3f7375 WZ	172
	173	__raw_writel(ADC_RST1, w90p910_ts->ts_reg);
	174	msleep(1);
	175	__raw_writel(ADC_RST0, w90p910_ts->ts_reg);
	176	msleep(1);
	177
	178	/* set delay and screen type */
	179	val = __raw_readl(w90p910_ts->ts_reg + 0x04);
	180	__raw_writel(val & TSC_FOURWIRE, w90p910_ts->ts_reg + 0x04);
	181	__raw_writel(ADC_DELAY, w90p910_ts->ts_reg + 0x08);
	182
	183	w90p910_ts->state = TS_WAIT_NEW_PACKET;
	184	wmb();
	185
	186	/* set trigger mode */
	187	val = __raw_readl(w90p910_ts->ts_reg);
	188	val \|= ADC_WAITTRIG \| ADC_DIV \| ADC_EN \| WT_INT_EN;
	189	__raw_writel(val, w90p910_ts->ts_reg);
	190
	191	return 0;
	192	}
	193
	194	static void w90p910_close(struct input_dev *dev)
	195	{
	196	struct w90p910_ts *w90p910_ts = input_get_drvdata(dev);
	197	unsigned long val;
	198
	199	/* disable trigger mode */
	200
	201	spin_lock_irq(&w90p910_ts->lock);
	202
	203	w90p910_ts->state = TS_IDLE;
	204
	205	val = __raw_readl(w90p910_ts->ts_reg);
	206	val &= ~(ADC_WAITTRIG \| ADC_DIV \| ADC_EN \| WT_INT_EN \| ADC_INT_EN);
	207	__raw_writel(val, w90p910_ts->ts_reg);
	208
	209	spin_unlock_irq(&w90p910_ts->lock);
	210
	211	/* Now that interrupts are shut off we can safely delete timer */
	212	del_timer_sync(&w90p910_ts->timer);
	213
	214	/* stop the ADC clock */
b7788c5f	215	clk_disable(w90p910_ts->clk);
7e3f7375 WZ	216	}
7e3f7375 WZ	217
5298cc4c	218	static int w90x900ts_probe(struct platform_device *pdev)
7e3f7375 WZ	219	{
	220	struct w90p910_ts *w90p910_ts;
	221	struct input_dev *input_dev;
	222	struct resource *res;
	223	int err;
	224
	225	w90p910_ts = kzalloc(sizeof(struct w90p910_ts), GFP_KERNEL);
	226	input_dev = input_allocate_device();
	227	if (!w90p910_ts \|\| !input_dev) {
	228	err = -ENOMEM;
	229	goto fail1;
	230	}
	231
	232	w90p910_ts->input = input_dev;
	233	w90p910_ts->state = TS_IDLE;
	234	spin_lock_init(&w90p910_ts->lock);
ee03e3f0	235	timer_setup(&w90p910_ts->timer, w90p910_check_pen_up, 0);
7e3f7375 WZ	236
	237	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	238	if (!res) {
	239	err = -ENXIO;
	240	goto fail1;
	241	}
	242
72398e4b	243	if (!request_mem_region(res->start, resource_size(res),
7e3f7375 WZ	244	pdev->name)) {
	245	err = -EBUSY;
	246	goto fail1;
	247	}
	248
72398e4b	249	w90p910_ts->ts_reg = ioremap(res->start, resource_size(res));
7e3f7375 WZ	250	if (!w90p910_ts->ts_reg) {
	251	err = -ENOMEM;
	252	goto fail2;
	253	}
	254
b7788c5f WZ	255	w90p910_ts->clk = clk_get(&pdev->dev, NULL);
	256	if (IS_ERR(w90p910_ts->clk)) {
	257	err = PTR_ERR(w90p910_ts->clk);
7e3f7375 WZ	258	goto fail3;
	259	}
	260
7e3f7375 WZ	261	input_dev->name = "W90P910 TouchScreen";
	262	input_dev->phys = "w90p910ts/event0";
	263	input_dev->id.bustype = BUS_HOST;
	264	input_dev->id.vendor = 0x0005;
	265	input_dev->id.product = 0x0001;
	266	input_dev->id.version = 0x0100;
	267	input_dev->dev.parent = &pdev->dev;
	268	input_dev->open = w90p910_open;
	269	input_dev->close = w90p910_close;
	270
	271	input_dev->evbit[0] = BIT_MASK(EV_KEY) \| BIT_MASK(EV_ABS);
	272	input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
	273
	274	input_set_abs_params(input_dev, ABS_X, 0, 0x400, 0, 0);
	275	input_set_abs_params(input_dev, ABS_Y, 0, 0x400, 0, 0);
	276
	277	input_set_drvdata(input_dev, w90p910_ts);
	278
	279	w90p910_ts->irq_num = platform_get_irq(pdev, 0);
	280	if (request_irq(w90p910_ts->irq_num, w90p910_ts_interrupt,
ec4665c4	281	0, "w90p910ts", w90p910_ts)) {
7e3f7375	282	err = -EBUSY;
b7788c5f	283	goto fail4;
7e3f7375 WZ	284	}
	285
	286	err = input_register_device(w90p910_ts->input);
	287	if (err)
b7788c5f	288	goto fail5;
7e3f7375 WZ	289
	290	platform_set_drvdata(pdev, w90p910_ts);
	291
	292	return 0;
	293
b7788c5f WZ	294	fail5: free_irq(w90p910_ts->irq_num, w90p910_ts);
b7788c5f WZ	295	fail4: clk_put(w90p910_ts->clk);
7e3f7375	296	fail3: iounmap(w90p910_ts->ts_reg);
72398e4b	297	fail2: release_mem_region(res->start, resource_size(res));
7e3f7375 WZ	298	fail1: input_free_device(input_dev);
	299	kfree(w90p910_ts);
	300	return err;
	301	}
	302
e2619cf7	303	static int w90x900ts_remove(struct platform_device *pdev)
7e3f7375 WZ	304	{
	305	struct w90p910_ts *w90p910_ts = platform_get_drvdata(pdev);
	306	struct resource *res;
	307
	308	free_irq(w90p910_ts->irq_num, w90p910_ts);
	309	del_timer_sync(&w90p910_ts->timer);
	310	iounmap(w90p910_ts->ts_reg);
	311
b7788c5f WZ	312	clk_put(w90p910_ts->clk);
b7788c5f WZ	313
7e3f7375	314	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
72398e4b	315	release_mem_region(res->start, resource_size(res));
7e3f7375 WZ	316
	317	input_unregister_device(w90p910_ts->input);
	318	kfree(w90p910_ts);
	319
7e3f7375 WZ	320	return 0;
	321	}
	322
	323	static struct platform_driver w90x900ts_driver = {
	324	.probe = w90x900ts_probe,
1cb0aa88	325	.remove = w90x900ts_remove,
7e3f7375	326	.driver = {
35c9221a	327	.name = "nuc900-ts",
7e3f7375 WZ	328	},
7e3f7375 WZ	329	};
cdcc96e2	330	module_platform_driver(w90x900ts_driver);
7e3f7375 WZ	331
	332	MODULE_AUTHOR("Wan ZongShun <mcuos.com@gmail.com>");
	333	MODULE_DESCRIPTION("w90p910 touch screen driver!");
	334	MODULE_LICENSE("GPL");
35c9221a	335	MODULE_ALIAS("platform:nuc900-ts");