path: root/drivers/input/keyboard/gpio_keys.c

/*
 * Driver for keys on GPIO lines capable of generating interrupts.
 *
 * 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/module.h>

#include <linux/init.h>
#include <linux/fs.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/sched.h>
#include <linux/pm.h>
#include <linux/slab.h>
#include <linux/sysctl.h>
#include <linux/proc_fs.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/input.h>
#include <linux/gpio_keys.h>
#include <linux/workqueue.h>
#include <linux/gpio.h>
#include <linux/irqdesc.h>

extern struct class *sec_class;

struct gpio_button_data {
	struct gpio_keys_button *button;
	struct input_dev *input;
	struct timer_list timer;
	struct work_struct work;
	int timer_debounce;	/* in msecs */
	bool disabled;
	bool key_state;
	bool wakeup;
};

struct gpio_keys_drvdata {
	struct input_dev *input;
	struct device *sec_key;
	struct mutex disable_lock;
	unsigned int n_buttons;
	int (*enable)(struct device *dev);
	void (*disable)(struct device *dev);
#ifdef CONFIG_SENSORS_HALL
	int gpio_flip_cover;
	bool flip_cover;
	struct delayed_work flip_cover_dwork;
#endif
	struct gpio_button_data data[0];
	/* WARNING: this area can be expanded. Do NOT add any member! */
};

#ifdef CONFIG_SENSORS_HALL
int flip_cover_open;
extern ts_powered_on;
#endif

/*
 * SYSFS interface for enabling/disabling keys and switches:
 *
 * There are 4 attributes under /sys/devices/platform/gpio-keys/
 *	keys [ro]              - bitmap of keys (EV_KEY) which can be
 *	                         disabled
 *	switches [ro]          - bitmap of switches (EV_SW) which can be
 *	                         disabled
 *	disabled_keys [rw]     - bitmap of keys currently disabled
 *	disabled_switches [rw] - bitmap of switches currently disabled
 *
 * Userland can change these values and hence disable event generation
 * for each key (or switch). Disabling a key means its interrupt line
 * is disabled.
 *
 * For example, if we have following switches set up as gpio-keys:
 *	SW_DOCK = 5
 *	SW_CAMERA_LENS_COVER = 9
 *	SW_KEYPAD_SLIDE = 10
 *	SW_FRONT_PROXIMITY = 11
 * This is read from switches:
 *	11-9,5
 * Next we want to disable proximity (11) and dock (5), we write:
 *	11,5
 * to file disabled_switches. Now proximity and dock IRQs are disabled.
 * This can be verified by reading the file disabled_switches:
 *	11,5
 * If we now want to enable proximity (11) switch we write:
 *	5
 * to disabled_switches.
 *
 * We can disable only those keys which don't allow sharing the irq.
 */

/**
 * get_n_events_by_type() - returns maximum number of events per @type
 * @type: type of button (%EV_KEY, %EV_SW)
 *
 * Return value of this function can be used to allocate bitmap
 * large enough to hold all bits for given type.
 */
static inline int get_n_events_by_type(int type)
{
	BUG_ON(type != EV_SW && type != EV_KEY);

	return (type == EV_KEY) ? KEY_CNT : SW_CNT;
}

/**
 * gpio_keys_disable_button() - disables given GPIO button
 * @bdata: button data for button to be disabled
 *
 * Disables button pointed by @bdata. This is done by masking
 * IRQ line. After this function is called, button won't generate
 * input events anymore. Note that one can only disable buttons
 * that don't share IRQs.
 *
 * Make sure that @bdata->disable_lock is locked when entering
 * this function to avoid races when concurrent threads are
 * disabling buttons at the same time.
 */
static void gpio_keys_disable_button(struct gpio_button_data *bdata)
{
	if (!bdata->disabled) {
		/*
		 * Disable IRQ and possible debouncing timer.
		 */
		disable_irq(gpio_to_irq(bdata->button->gpio));
		if (bdata->timer_debounce)
			del_timer_sync(&bdata->timer);

		bdata->disabled = true;
	}
}

/**
 * gpio_keys_enable_button() - enables given GPIO button
 * @bdata: button data for button to be disabled
 *
 * Enables given button pointed by @bdata.
 *
 * Make sure that @bdata->disable_lock is locked when entering
 * this function to avoid races with concurrent threads trying
 * to enable the same button at the same time.
 */
static void gpio_keys_enable_button(struct gpio_button_data *bdata)
{
	if (bdata->disabled) {
		enable_irq(gpio_to_irq(bdata->button->gpio));
		bdata->disabled = false;
	}
}

/**
 * gpio_keys_attr_show_helper() - fill in stringified bitmap of buttons
 * @ddata: pointer to drvdata
 * @buf: buffer where stringified bitmap is written
 * @type: button type (%EV_KEY, %EV_SW)
 * @only_disabled: does caller want only those buttons that are
 *                 currently disabled or all buttons that can be
 *                 disabled
 *
 * This function writes buttons that can be disabled to @buf. If
 * @only_disabled is true, then @buf contains only those buttons
 * that are currently disabled. Returns 0 on success or negative
 * errno on failure.
 */
static ssize_t gpio_keys_attr_show_helper(struct gpio_keys_drvdata *ddata,
					  char *buf, unsigned int type,
					  bool only_disabled)
{
	int n_events = get_n_events_by_type(type);
	unsigned long *bits;
	ssize_t ret;
	int i;

	bits = kcalloc(BITS_TO_LONGS(n_events), sizeof(*bits), GFP_KERNEL);
	if (!bits)
		return -ENOMEM;

	for (i = 0; i < ddata->n_buttons; i++) {
		struct gpio_button_data *bdata = &ddata->data[i];

		if (bdata->button->type != type)
			continue;

		if (only_disabled && !bdata->disabled)
			continue;

		__set_bit(bdata->button->code, bits);
	}

	ret = bitmap_scnlistprintf(buf, PAGE_SIZE - 2, bits, n_events);
	buf[ret++] = '\n';
	buf[ret] = '\0';

	kfree(bits);

	return ret;
}

/**
 * gpio_keys_attr_store_helper() - enable/disable buttons based on given bitmap
 * @ddata: pointer to drvdata
 * @buf: buffer from userspace that contains stringified bitmap
 * @type: button type (%EV_KEY, %EV_SW)
 *
 * This function parses stringified bitmap from @buf and disables/enables
 * GPIO buttons accordinly. Returns 0 on success and negative error
 * on failure.
 */
static ssize_t gpio_keys_attr_store_helper(struct gpio_keys_drvdata *ddata,
					   const char *buf, unsigned int type)
{
	int n_events = get_n_events_by_type(type);
	unsigned long *bits;
	ssize_t error;
	int i;

	bits = kcalloc(BITS_TO_LONGS(n_events), sizeof(*bits), GFP_KERNEL);
	if (!bits)
		return -ENOMEM;

	error = bitmap_parselist(buf, bits, n_events);
	if (error)
		goto out;

	/* First validate */
	for (i = 0; i < ddata->n_buttons; i++) {
		struct gpio_button_data *bdata = &ddata->data[i];

		if (bdata->button->type != type)
			continue;

		if (test_bit(bdata->button->code, bits) &&
		    !bdata->button->can_disable) {
			error = -EINVAL;
			goto out;
		}
	}

	mutex_lock(&ddata->disable_lock);

	for (i = 0; i < ddata->n_buttons; i++) {
		struct gpio_button_data *bdata = &ddata->data[i];

		if (bdata->button->type != type)
			continue;

		if (test_bit(bdata->button->code, bits))
			gpio_keys_disable_button(bdata);
		else
			gpio_keys_enable_button(bdata);
	}

	mutex_unlock(&ddata->disable_lock);

out:
	kfree(bits);
	return error;
}

#define ATTR_SHOW_FN(name, type, only_disabled)				\
static ssize_t gpio_keys_show_##name(struct device *dev,		\
				     struct device_attribute *attr,	\
				     char *buf)				\
{									\
	struct platform_device *pdev = to_platform_device(dev);		\
	struct gpio_keys_drvdata *ddata = platform_get_drvdata(pdev);	\
									\
	return gpio_keys_attr_show_helper(ddata, buf,			\
					  type, only_disabled);		\
}

ATTR_SHOW_FN(keys, EV_KEY, false);
ATTR_SHOW_FN(switches, EV_SW, false);
ATTR_SHOW_FN(disabled_keys, EV_KEY, true);
ATTR_SHOW_FN(disabled_switches, EV_SW, true);

/*
 * ATTRIBUTES:
 *
 * /sys/devices/platform/gpio-keys/keys [ro]
 * /sys/devices/platform/gpio-keys/switches [ro]
 */
static DEVICE_ATTR(keys, S_IRUGO, gpio_keys_show_keys, NULL);
static DEVICE_ATTR(switches, S_IRUGO, gpio_keys_show_switches, NULL);

#define ATTR_STORE_FN(name, type)					\
static ssize_t gpio_keys_store_##name(struct device *dev,		\
				      struct device_attribute *attr,	\
				      const char *buf,			\
				      size_t count)			\
{									\
	struct platform_device *pdev = to_platform_device(dev);		\
	struct gpio_keys_drvdata *ddata = platform_get_drvdata(pdev);	\
	ssize_t error;							\
									\
	error = gpio_keys_attr_store_helper(ddata, buf, type);		\
	if (error)							\
		return error;						\
									\
	return count;							\
}

ATTR_STORE_FN(disabled_keys, EV_KEY);
ATTR_STORE_FN(disabled_switches, EV_SW);

/*
 * ATTRIBUTES:
 *
 * /sys/devices/platform/gpio-keys/disabled_keys [rw]
 * /sys/devices/platform/gpio-keys/disables_switches [rw]
 */
static DEVICE_ATTR(disabled_keys, S_IWUSR | S_IRUGO,
		   gpio_keys_show_disabled_keys,
		   gpio_keys_store_disabled_keys);
static DEVICE_ATTR(disabled_switches, S_IWUSR | S_IRUGO,
		   gpio_keys_show_disabled_switches,
		   gpio_keys_store_disabled_switches);

static struct attribute *gpio_keys_attrs[] = {
	&dev_attr_keys.attr,
	&dev_attr_switches.attr,
	&dev_attr_disabled_keys.attr,
	&dev_attr_disabled_switches.attr,
	NULL,
};

static struct attribute_group gpio_keys_attr_group = {
	.attrs = gpio_keys_attrs,
};

static ssize_t key_pressed_show(struct device *dev,
				struct device_attribute *attr, char *buf)
{
	struct gpio_keys_drvdata *ddata = dev_get_drvdata(dev);
	int i;
	int keystate = 0;

	for (i = 0; i < ddata->n_buttons; i++) {
		struct gpio_button_data *bdata = &ddata->data[i];
		keystate |= bdata->key_state;
	}

	if (keystate)
		sprintf(buf, "PRESS");
	else
		sprintf(buf, "RELEASE");

	return strlen(buf);
}

/* the volume keys can be the wakeup keys in special case */
static ssize_t wakeup_enable(struct device *dev,
	struct device_attribute *attr, const char *buf, size_t count)
{
	struct gpio_keys_drvdata *ddata = dev_get_drvdata(dev);
	int n_events = get_n_events_by_type(EV_KEY);
	unsigned long *bits;
	ssize_t error;
	int i;

	bits = kcalloc(BITS_TO_LONGS(n_events),
		sizeof(*bits), GFP_KERNEL);
	if (!bits)
		return -ENOMEM;

	error = bitmap_parselist(buf, bits, n_events);
	if (error)
		goto out;

	for (i = 0; i < ddata->n_buttons; i++) {
		struct gpio_button_data *button = &ddata->data[i];
		if (test_bit(button->button->code, bits))
			button->button->wakeup = 1;
		else
			button->button->wakeup = 0;
	}

out:
	kfree(bits);
	return count;
}

#ifdef CONFIG_SENSORS_HALL
static ssize_t hall_detect_show(struct device *dev,
				struct device_attribute *attr, char *buf)
{
	struct gpio_keys_drvdata *ddata = dev_get_drvdata(dev);

	if (ddata->flip_cover){
	        printk("%s: OPEN",__func__);
		sprintf(buf, "OPEN");
	}else{
	        printk("%s: CLOSE",__func__);
		sprintf(buf, "CLOSE");
	}

	return strlen(buf);
}
#endif

static DEVICE_ATTR(sec_key_pressed, 0664, key_pressed_show, NULL);
static DEVICE_ATTR(wakeup_keys, 0664, NULL, wakeup_enable);
#ifdef CONFIG_SENSORS_HALL
static DEVICE_ATTR(hall_detect, 0664, hall_detect_show, NULL);
#endif

static struct attribute *sec_key_attrs[] = {
	&dev_attr_sec_key_pressed.attr,
	&dev_attr_wakeup_keys.attr,
#ifdef CONFIG_SENSORS_HALL
	&dev_attr_hall_detect.attr,
#endif
	NULL,
};

static struct attribute_group sec_key_attr_group = {
	.attrs = sec_key_attrs,
};

#ifdef CONFIG_MACH_GC1
void gpio_keys_check_zoom_exception(unsigned int code,
	bool *zoomkey, unsigned int *hotkey, unsigned int *index)
{
	switch (code) {
	case KEY_CAMERA_ZOOMIN:
		*hotkey = 0x221;
		*index = 5;
		break;
	case KEY_CAMERA_ZOOMOUT:
		*hotkey = 0x222;
		*index = 6;
		break;
	case 0x221:
		*hotkey = KEY_CAMERA_ZOOMIN;
		*index = 3;
		break;
	case 0x222:
		*hotkey = KEY_CAMERA_ZOOMOUT;
		*index = 4;
		break;
	default:
		*zoomkey = false;
		return;
	}
	*zoomkey = true;
}
#endif

#ifdef CONFIG_FAST_BOOT
extern bool fake_shut_down;

struct timer_list fake_timer;
bool fake_pressed;

static void gpio_keys_fake_off_check(unsigned long _data)
{
	struct input_dev *input = (struct input_dev *)_data;
	unsigned int type = EV_KEY;

	if (fake_pressed == false)
		return ;

	printk(KERN_DEBUG"[Keys] make event\n");

	input_event(input, type, KEY_FAKE_PWR, 1);
	input_sync(input);

	input_event(input, type, KEY_FAKE_PWR, 0);
	input_sync(input);
}
#endif

static void gpio_keys_report_event(struct gpio_button_data *bdata)
{
	struct gpio_keys_button *button = bdata->button;
	struct input_dev *input = bdata->input;
	unsigned int type = button->type ?: EV_KEY;
	int state = (gpio_get_value_cansleep(button->gpio) ? 1 : 0)
		^ button->active_low;
#ifdef CONFIG_MACH_GC1
	struct gpio_keys_drvdata *ddata = input_get_drvdata(input);
	struct gpio_button_data *tmp_bdata;
	static bool overlapped;
	static unsigned int hotkey;
	unsigned int index_hotkey = 0;
	bool zoomkey = false;

#ifdef CONFIG_FAST_BOOT
	/*Fake pwr off control*/
	if (fake_shut_down) {
		if (button->code == KEY_POWER) {
			if (!!state) {
				printk(KERN_DEBUG"[Keys] start fake check\n");
				fake_pressed = true;
				mod_timer(&fake_timer,
					jiffies + msecs_to_jiffies(1000));
			} else {
				printk(KERN_DEBUG"[Keys] end fake checkPwr 0\n");
				fake_pressed = false;
			}
		}
		return ;
	}
#endif
	if (system_rev < 6 && system_rev >= 2) {
		if (overlapped) {
			if (hotkey == button->code && !state) {
				bdata->key_state = !!state;
				bdata->wakeup = false;
				overlapped = false;
#ifdef CONFIG_SAMSUNG_PRODUCT_SHIP
				printk(KERN_DEBUG"[KEYS] Ignored\n");
#else
				printk(KERN_DEBUG"[KEYS] Ignore %d %d\n",
						hotkey, state);
#endif
				return;
			}
		}

		gpio_keys_check_zoom_exception(button->code, &zoomkey,
				&hotkey, &index_hotkey);
	}
#endif

	if (type == EV_ABS) {
		if (state) {
			input_event(input, type, button->code, button->value);
			input_sync(input);
			}
	} else {
		if (bdata->wakeup && !state) {
			input_event(input, type, button->code, !state);
			input_sync(input);
			if (button->code == KEY_POWER)
				printk(KERN_DEBUG"[keys] f PWR %d\n", !state);
		}

		bdata->key_state = !!state;
		bdata->wakeup = false;


#ifdef CONFIG_MACH_GC1
		if (system_rev < 6 && system_rev >= 2
				&& zoomkey && state) {
			tmp_bdata = &ddata->data[index_hotkey];

			if (tmp_bdata->key_state) {
#ifdef CONFIG_SAMSUNG_PRODUCT_SHIP
				printk(KERN_DEBUG"[KEYS] overlapped\n");
#else
				printk(KERN_DEBUG"[KEYS] overlapped. Forced release c %d h %d\n",
					tmp_bdata->button->code, hotkey);
#endif
				input_event(input, type, hotkey, 0);
				input_sync(input);

				overlapped = true;
			}
		}
#endif
#ifdef CONFIG_SENSORS_HALL
	      if(!flip_cover_open && button->code == KEY_POWER){
	        printk(KERN_DEBUG" cover closed...ignoring PWR button");
	      }else{ 
#endif
		input_event(input, type, button->code, !!state);
		input_sync(input);
#ifdef CONFIG_SENSORS_HALL
	      }
#endif
		if (button->code == KEY_POWER)
			printk(KERN_DEBUG"[keys]PWR %d\n", !!state);
	}
}

static void gpio_keys_work_func(struct work_struct *work)
{
	struct gpio_button_data *bdata =
		container_of(work, struct gpio_button_data, work);

	gpio_keys_report_event(bdata);
}

static void gpio_keys_timer(unsigned long _data)
{
	struct gpio_button_data *data = (struct gpio_button_data *)_data;

	schedule_work(&data->work);
}

static irqreturn_t gpio_keys_isr(int irq, void *dev_id)
{
	struct gpio_button_data *bdata = dev_id;
	struct gpio_keys_button *button = bdata->button;
	struct irq_desc *desc = irq_to_desc(irq);
	int state = (gpio_get_value_cansleep(button->gpio) ? 1 : 0)
		^ button->active_low;

	BUG_ON(irq != gpio_to_irq(button->gpio));

	if (desc) {
		if (0 < desc->wake_depth) {
			bdata->wakeup = true;
			printk(KERN_DEBUG"[keys] in the sleep\n");
		}
	}

	if (bdata->timer_debounce)
		mod_timer(&bdata->timer,
			jiffies + msecs_to_jiffies(bdata->timer_debounce));
	else
		schedule_work(&bdata->work);

	if (button->isr_hook)
		button->isr_hook(button->code, state);

	return IRQ_HANDLED;
}

static int __devinit gpio_keys_setup_key(struct platform_device *pdev,
					 struct gpio_button_data *bdata,
					 struct gpio_keys_button *button)
{
	const char *desc = button->desc ? button->desc : "gpio_keys";
	struct device *dev = &pdev->dev;
	unsigned long irqflags;
	int irq, error;

	setup_timer(&bdata->timer, gpio_keys_timer, (unsigned long)bdata);
	INIT_WORK(&bdata->work, gpio_keys_work_func);

	error = gpio_request(button->gpio, desc);
	if (error < 0) {
		dev_err(dev, "failed to request GPIO %d, error %d\n",
			button->gpio, error);
		goto fail2;
	}

	error = gpio_direction_input(button->gpio);
	if (error < 0) {
		dev_err(dev, "failed to configure"
			" direction for GPIO %d, error %d\n",
			button->gpio, error);
		goto fail3;
	}

	if (button->debounce_interval) {
		error = gpio_set_debounce(button->gpio,
					  button->debounce_interval * 1000);
		/* use timer if gpiolib doesn't provide debounce */
		if (error < 0)
			bdata->timer_debounce = button->debounce_interval;
	}

	irq = gpio_to_irq(button->gpio);
	if (irq < 0) {
		error = irq;
		dev_err(dev, "Unable to get irq number for GPIO %d, error %d\n",
			button->gpio, error);
		goto fail3;
	}

	irqflags = IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING;
	/*
	 * If platform has specified that the button can be disabled,
	 * we don't want it to share the interrupt line.
	 */
	if (!button->can_disable)
		irqflags |= IRQF_SHARED;

	if (button->wakeup)
		irqflags |= IRQF_NO_SUSPEND;

	error = request_any_context_irq(irq, gpio_keys_isr, irqflags, desc, bdata);
	if (error < 0) {
		dev_err(dev, "Unable to claim irq %d; error %d\n",
			irq, error);
		goto fail3;
	}

	return 0;

fail3:
	gpio_free(button->gpio);
fail2:
	return error;
}

#ifdef CONFIG_SENSORS_HALL
static void flip_cover_work(struct work_struct *work)
{  
	struct gpio_keys_drvdata *ddata =
		container_of(work, struct gpio_keys_drvdata,
				flip_cover_dwork.work);

	ddata->flip_cover = gpio_get_value(ddata->gpio_flip_cover);

	printk(KERN_DEBUG "[keys] %s : %d\n",
		__func__, ddata->flip_cover);

 /*       input_report_switch(ddata->input, SW_FLIP, ddata->flip_cover);
	input_sync(ddata->input);*/
	
	flip_cover_open = ddata->flip_cover;
	
	if(!ts_powered_on && !ddata->flip_cover){
	  printk("[keys] screen already off\n");
        }else if(ts_powered_on && ddata->flip_cover){
          printk("[keys] screen already on\n");
	}else{
          input_report_key(ddata->input, KEY_POWER, 1);
 	  input_sync(ddata->input);
          input_report_key(ddata->input, KEY_POWER, 0);
	  input_sync(ddata->input);
	}
}

static irqreturn_t flip_cover_detect(int irq, void *dev_id)
{
	struct gpio_keys_drvdata *ddata = dev_id;

	cancel_delayed_work_sync(&ddata->flip_cover_dwork);
	schedule_delayed_work(&ddata->flip_cover_dwork, HZ / 20);
	return IRQ_HANDLED;
}
#endif

static int gpio_keys_open(struct input_dev *input)
{
	struct gpio_keys_drvdata *ddata = input_get_drvdata(input);
	
#ifdef CONFIG_SENSORS_HALL
	int ret = 0;
	int irq = gpio_to_irq(ddata->gpio_flip_cover);

	INIT_DELAYED_WORK(&ddata->flip_cover_dwork, flip_cover_work);

	ret = request_threaded_irq(
		irq, NULL,
		flip_cover_detect,
		IRQF_DISABLED | IRQF_TRIGGER_RISING |
		IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
		"flip_cover", ddata);

	if (ret) {
		printk(KERN_ERR
		"keys: failed to request flip cover irq %d gpio %d\n",
		irq, ddata->gpio_flip_cover);
		goto hall_sensor_error;
	}

	ret = enable_irq_wake(irq);
	if (ret < 0) {
		printk(KERN_ERR
           "keys: Failed to Enable Wakeup Source(%d) \n",
		ret);
		goto hall_sensor_error;
	}

	/* update the current status */
	schedule_delayed_work(&ddata->flip_cover_dwork, HZ / 2);

hall_sensor_error:

#endif

       return ddata->enable ? ddata->enable(input->dev.parent) : 0;
}

static void gpio_keys_close(struct input_dev *input)
{
	struct gpio_keys_drvdata *ddata = input_get_drvdata(input);

	if (ddata->disable)
		ddata->disable(input->dev.parent);
}

static int __devinit gpio_keys_probe(struct platform_device *pdev)
{
	struct gpio_keys_platform_data *pdata = pdev->dev.platform_data;
	struct gpio_keys_drvdata *ddata;
	struct device *dev = &pdev->dev;
	struct input_dev *input;
	int i, error;
	int wakeup = 0;

	ddata = kzalloc(sizeof(struct gpio_keys_drvdata) +
			pdata->nbuttons * sizeof(struct gpio_button_data),
			GFP_KERNEL);
	input = input_allocate_device();
	if (!ddata || !input) {
		dev_err(dev, "failed to allocate state\n");
		error = -ENOMEM;
		goto fail1;
	}

	ddata->input = input;
	ddata->n_buttons = pdata->nbuttons;
	ddata->enable = pdata->enable;
	ddata->disable = pdata->disable;
#ifdef CONFIG_SENSORS_HALL
	ddata->gpio_flip_cover = pdata->gpio_flip_cover;
#endif
	mutex_init(&ddata->disable_lock);

	platform_set_drvdata(pdev, ddata);
	input_set_drvdata(input, ddata);

	input->name = pdata->name ? : pdev->name;
	input->phys = "gpio-keys/input0";
	input->dev.parent = &pdev->dev;
/*#ifdef CONFIG_SENSORS_HALL
	input->evbit[0] |= BIT_MASK(EV_SW);
	input_set_capability(input, EV_SW, SW_FLIP);
#endif*/
	input->open = gpio_keys_open;
	input->close = gpio_keys_close;

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

	/* Enable auto repeat feature of Linux input subsystem */
	if (pdata->rep)
		__set_bit(EV_REP, input->evbit);

	for (i = 0; i < pdata->nbuttons; i++) {
		struct gpio_keys_button *button = &pdata->buttons[i];
		struct gpio_button_data *bdata = &ddata->data[i];
		unsigned int type = button->type ?: EV_KEY;

		bdata->input = input;
		bdata->button = button;

		error = gpio_keys_setup_key(pdev, bdata, button);
		if (error)
			goto fail2;

		if (button->wakeup)
			wakeup = 1;

		input_set_capability(input, type, button->code);
	}

	error = sysfs_create_group(&pdev->dev.kobj, &gpio_keys_attr_group);
	if (error) {
		dev_err(dev, "Unable to export keys/switches, error: %d\n",
			error);
		goto fail2;
	}

	ddata->sec_key =
	    device_create(sec_class, NULL, 0, ddata, "sec_key");
	if (IS_ERR(ddata->sec_key))
		dev_err(dev, "Failed to create sec_key device\n");

	error = sysfs_create_group(&ddata->sec_key->kobj, &sec_key_attr_group);
	if (error) {
		dev_err(dev, "Failed to create the test sysfs: %d\n",
			error);
		goto fail2;
	}

	error = input_register_device(input);
	if (error) {
		dev_err(dev, "Unable to register input device, error: %d\n",
			error);
		goto fail3;
	}

	/* get current state of buttons */
	for (i = 0; i < pdata->nbuttons; i++)
		gpio_keys_report_event(&ddata->data[i]);
	input_sync(input);

#ifdef CONFIG_FAST_BOOT
	/*Fake power off*/
	input_set_capability(input, EV_KEY, KEY_FAKE_PWR);
	setup_timer(&fake_timer, gpio_keys_fake_off_check,
			(unsigned long)input);
#endif
	device_init_wakeup(&pdev->dev, wakeup);

	return 0;

 fail3:
	sysfs_remove_group(&pdev->dev.kobj, &gpio_keys_attr_group);
	sysfs_remove_group(&ddata->sec_key->kobj, &sec_key_attr_group);
 fail2:
	while (--i >= 0) {
		free_irq(gpio_to_irq(pdata->buttons[i].gpio), &ddata->data[i]);
		if (ddata->data[i].timer_debounce)
			del_timer_sync(&ddata->data[i].timer);
		cancel_work_sync(&ddata->data[i].work);
		gpio_free(pdata->buttons[i].gpio);
	}

	platform_set_drvdata(pdev, NULL);
 fail1:
	input_free_device(input);
	kfree(ddata);

	return error;
}

static int __devexit gpio_keys_remove(struct platform_device *pdev)
{
	struct gpio_keys_platform_data *pdata = pdev->dev.platform_data;
	struct gpio_keys_drvdata *ddata = platform_get_drvdata(pdev);
	struct input_dev *input = ddata->input;
	int i;

	sysfs_remove_group(&pdev->dev.kobj, &gpio_keys_attr_group);

	device_init_wakeup(&pdev->dev, 0);

	for (i = 0; i < pdata->nbuttons; i++) {
		int irq = gpio_to_irq(pdata->buttons[i].gpio);
		free_irq(irq, &ddata->data[i]);
		if (ddata->data[i].timer_debounce)
			del_timer_sync(&ddata->data[i].timer);
		cancel_work_sync(&ddata->data[i].work);
		gpio_free(pdata->buttons[i].gpio);
	}

	input_unregister_device(input);

	return 0;
}


#ifdef CONFIG_PM
static int gpio_keys_suspend(struct device *dev)
{
	struct platform_device *pdev = to_platform_device(dev);
	struct gpio_keys_platform_data *pdata = pdev->dev.platform_data;
	int i;

	if (device_may_wakeup(&pdev->dev)) {
		for (i = 0; i < pdata->nbuttons; i++) {
			struct gpio_keys_button *button = &pdata->buttons[i];
			if (button->wakeup) {
				int irq = gpio_to_irq(button->gpio);
				enable_irq_wake(irq);
			}
		}
	}

	return 0;
}

static int gpio_keys_resume(struct device *dev)
{
	struct platform_device *pdev = to_platform_device(dev);
	struct gpio_keys_drvdata *ddata = platform_get_drvdata(pdev);
	struct gpio_keys_platform_data *pdata = pdev->dev.platform_data;
	int i;

	for (i = 0; i < pdata->nbuttons; i++) {

		struct gpio_keys_button *button = &pdata->buttons[i];
		if (button->wakeup && device_may_wakeup(&pdev->dev)) {
			int irq = gpio_to_irq(button->gpio);
			disable_irq_wake(irq);
		}

		gpio_keys_report_event(&ddata->data[i]);
	}
	input_sync(ddata->input);

	return 0;
}

static const struct dev_pm_ops gpio_keys_pm_ops = {
	.suspend	= gpio_keys_suspend,
	.resume		= gpio_keys_resume,
};
#endif

static struct platform_driver gpio_keys_device_driver = {
	.probe		= gpio_keys_probe,
	.remove		= __devexit_p(gpio_keys_remove),
	.driver		= {
		.name	= "gpio-keys",
		.owner	= THIS_MODULE,
#ifdef CONFIG_PM
		.pm	= &gpio_keys_pm_ops,
#endif
	}
};

static int __init gpio_keys_init(void)
{
	return platform_driver_register(&gpio_keys_device_driver);
}

static void __exit gpio_keys_exit(void)
{
	platform_driver_unregister(&gpio_keys_device_driver);
}

module_init(gpio_keys_init);
module_exit(gpio_keys_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Phil Blundell <pb@handhelds.org>");
MODULE_DESCRIPTION("Keyboard driver for CPU GPIOs");
MODULE_ALIAS("platform:gpio-keys");