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android_kernel_samsung_hero.../drivers/input/keyboard/gpio_keys.c
HackerOO7 2bd1731e0a init: OSRC G9300ZCU2APF7
2016-08-17 16:41:52 +08:00

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/*
* Driver for keys on GPIO lines capable of generating interrupts.
*
* Copyright 2005 Phil Blundell
* Copyright 2010, 2011 David Jander <david@protonic.nl>
* Copyright (c) 2015, The Linux Foundation. All rights reserved.
*
* 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/of.h>
#include <linux/of_platform.h>
#include <linux/of_gpio.h>
#include <linux/spinlock.h>
#include <linux/wakelock.h>
#include <linux/pinctrl/consumer.h>
#include <linux/syscore_ops.h>
#ifdef CONFIG_SEC_DEBUG
#include <linux/qcom/sec_debug.h>
#endif
#ifdef CONFIG_SEC_PM
#include <linux/qpnp/power-on.h>
#endif
#if defined(CONFIG_SENSORS_HALL)
static bool flip_cover;
#endif
static int wakeup_reason;
static bool key_wakeup;
bool wakeup_by_key(void) {
if (key_wakeup)
if (wakeup_reason == KEY_HOMEPAGE) {
key_wakeup = false;
wakeup_reason = 0;
return true;
}
return false;
}
EXPORT_SYMBOL(wakeup_by_key);
struct device *sec_key;
EXPORT_SYMBOL(sec_key);
struct gpio_button_data {
struct gpio_keys_button *button;
struct input_dev *input;
struct timer_list timer;
struct work_struct work;
unsigned int timer_debounce; /* in msecs */
unsigned int irq;
spinlock_t lock;
bool disabled;
bool key_pressed;
};
struct gpio_keys_drvdata {
const struct gpio_keys_platform_data *pdata;
struct pinctrl *key_pinctrl;
struct input_dev *input;
struct mutex disable_lock;
#if defined(CONFIG_SENSORS_HALL)
int gpio_flip_cover;
int irq_flip_cover;
bool flip_cover;
struct delayed_work flip_cover_dwork;
struct wake_lock flip_wake_lock;
#endif
struct gpio_button_data data[0];
};
static struct device *global_dev;
static struct syscore_ops gpio_keys_syscore_pm_ops;
static void gpio_keys_syscore_resume(void);
/*
* 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(bdata->irq);
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(bdata->irq);
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->pdata->nbuttons; 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 accordingly. 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->pdata->nbuttons; 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->pdata->nbuttons; 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 void gpio_keys_gpio_report_event(struct gpio_button_data *bdata)
{
const struct gpio_keys_button *button = bdata->button;
struct input_dev *input = bdata->input;
unsigned int type = button->type ?: EV_KEY;
int state;
state = (__gpio_get_value(button->gpio) ? 1 : 0) ^ button->active_low;
#ifdef CONFIG_SEC_DEBUG
sec_debug_check_crash_key(button->code, state);
#endif
if (type == EV_ABS) {
if (state)
input_event(input, type, button->code, button->value);
} else {
input_event(input, type, button->code, !!state);
}
input_sync(input);
pr_err("%s %s: %d, %d, %d\n", SECLOG, __func__, button->code, button->value, state);
}
static void gpio_keys_gpio_work_func(struct work_struct *work)
{
struct gpio_button_data *bdata =
container_of(work, struct gpio_button_data, work);
gpio_keys_gpio_report_event(bdata);
if (bdata->button->wakeup)
pm_relax(bdata->input->dev.parent);
}
static void gpio_keys_gpio_timer(unsigned long _data)
{
struct gpio_button_data *bdata = (struct gpio_button_data *)_data;
schedule_work(&bdata->work);
}
static irqreturn_t gpio_keys_gpio_isr(int irq, void *dev_id)
{
struct gpio_button_data *bdata = dev_id;
BUG_ON(irq != bdata->irq);
if (bdata->button->wakeup)
pm_stay_awake(bdata->input->dev.parent);
if (bdata->timer_debounce)
mod_timer(&bdata->timer,
jiffies + msecs_to_jiffies(bdata->timer_debounce));
else
schedule_work(&bdata->work);
return IRQ_HANDLED;
}
static void gpio_keys_irq_timer(unsigned long _data)
{
struct gpio_button_data *bdata = (struct gpio_button_data *)_data;
struct input_dev *input = bdata->input;
unsigned long flags;
spin_lock_irqsave(&bdata->lock, flags);
if (bdata->key_pressed) {
input_event(input, EV_KEY, bdata->button->code, 0);
input_sync(input);
bdata->key_pressed = false;
}
spin_unlock_irqrestore(&bdata->lock, flags);
}
static irqreturn_t gpio_keys_irq_isr(int irq, void *dev_id)
{
struct gpio_button_data *bdata = dev_id;
const struct gpio_keys_button *button = bdata->button;
struct input_dev *input = bdata->input;
unsigned long flags;
BUG_ON(irq != bdata->irq);
spin_lock_irqsave(&bdata->lock, flags);
if (!bdata->key_pressed) {
if (bdata->button->wakeup)
pm_wakeup_event(bdata->input->dev.parent, 0);
input_event(input, EV_KEY, button->code, 1);
input_sync(input);
if (!bdata->timer_debounce) {
input_event(input, EV_KEY, button->code, 0);
input_sync(input);
goto out;
}
bdata->key_pressed = true;
}
if (bdata->timer_debounce)
mod_timer(&bdata->timer,
jiffies + msecs_to_jiffies(bdata->timer_debounce));
out:
spin_unlock_irqrestore(&bdata->lock, flags);
return IRQ_HANDLED;
}
static void gpio_keys_quiesce_key(void *data)
{
struct gpio_button_data *bdata = data;
if (bdata->timer_debounce)
del_timer_sync(&bdata->timer);
cancel_work_sync(&bdata->work);
}
static int gpio_keys_setup_key(struct platform_device *pdev,
struct input_dev *input,
struct gpio_button_data *bdata,
struct gpio_keys_button *button)
{
const char *desc = button->desc ? button->desc : "gpio_keys";
struct device *dev = &pdev->dev;
irq_handler_t isr;
unsigned long irqflags;
int irq;
int error;
bdata->input = input;
bdata->button = button;
spin_lock_init(&bdata->lock);
if (gpio_is_valid(button->gpio)) {
error = devm_gpio_request_one(&pdev->dev, button->gpio,
GPIOF_IN, desc);
if (error < 0) {
dev_err(dev, "Failed to request GPIO %d, error %d\n",
button->gpio, error);
return error;
}
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);
return error;
}
bdata->irq = irq;
INIT_WORK(&bdata->work, gpio_keys_gpio_work_func);
setup_timer(&bdata->timer,
gpio_keys_gpio_timer, (unsigned long)bdata);
isr = gpio_keys_gpio_isr;
irqflags = IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING;
} else {
if (!button->irq) {
dev_err(dev, "No IRQ specified\n");
return -EINVAL;
}
bdata->irq = button->irq;
if (button->type && button->type != EV_KEY) {
dev_err(dev, "Only EV_KEY allowed for IRQ buttons.\n");
return -EINVAL;
}
bdata->timer_debounce = button->debounce_interval;
setup_timer(&bdata->timer,
gpio_keys_irq_timer, (unsigned long)bdata);
isr = gpio_keys_irq_isr;
irqflags = 0;
}
/*don't send dummy release event when system resumes*/
__set_bit(INPUT_PROP_NO_DUMMY_RELEASE, input->propbit);
input_set_capability(input, button->type ?: EV_KEY, button->code);
/*
* Install custom action to cancel debounce timer and
* workqueue item.
*/
error = devm_add_action(&pdev->dev, gpio_keys_quiesce_key, bdata);
if (error) {
dev_err(&pdev->dev,
"failed to register quiesce action, error: %d\n",
error);
return error;
}
/*
* 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;
error = devm_request_any_context_irq(&pdev->dev, bdata->irq,
isr, irqflags, desc, bdata);
if (error < 0) {
dev_err(dev, "Unable to claim irq %d; error %d\n",
bdata->irq, error);
return error;
}
return 0;
}
static void gpio_keys_report_state(struct gpio_keys_drvdata *ddata, bool resume)
{
struct input_dev *input = ddata->input;
int i;
for (i = 0; i < ddata->pdata->nbuttons; i++) {
struct gpio_button_data *bdata = &ddata->data[i];
if (gpio_is_valid(bdata->button->gpio)) {
gpio_keys_gpio_report_event(bdata);
if (resume && ((__gpio_get_value(bdata->button->gpio) ? 1 : 0) ^ bdata->button->active_low)) {
wakeup_reason = bdata->button->code;
key_wakeup = true;
pr_info("%s: wakeup by %d\n", __func__, wakeup_reason);
}
}
}
input_sync(input);
}
#if defined(CONFIG_SENSORS_HALL)
#ifdef CONFIG_SEC_FACTORY
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);
int comp_val[2]={0};
comp_val[0] = gpio_get_value(ddata->gpio_flip_cover);
mdelay(30);
comp_val[1] = gpio_get_value(ddata->gpio_flip_cover);
if (comp_val[0] == comp_val[1]) {
ddata->flip_cover = gpio_get_value(ddata->gpio_flip_cover);
flip_cover=ddata->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);
} else {
printk(KERN_DEBUG "%s : Value is not same!\n", __func__);
}
}
#else // CONFIG_SEC_FACTORY
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);
flip_cover=ddata->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);
}
#endif // CONFIG_SEC_FACTORY
static irqreturn_t flip_cover_detect(int irq, void *dev_id)
{
bool flip_status;
struct gpio_keys_drvdata *ddata = dev_id;
flip_status = gpio_get_value(ddata->gpio_flip_cover);
printk(KERN_DEBUG "[keys] %s flip_satatus : %d\n",
__func__, flip_status);
cancel_delayed_work_sync(&ddata->flip_cover_dwork);
if(flip_status) {
wake_lock_timeout(&ddata->flip_wake_lock, HZ * 5 / 100); /* 50ms */
schedule_delayed_work(&ddata->flip_cover_dwork, HZ * 1 / 100); /* 10ms */
} else {
wake_unlock(&ddata->flip_wake_lock);
schedule_delayed_work(&ddata->flip_cover_dwork, 0);
}
return IRQ_HANDLED;
}
#endif /* CONFIG_SENSORS_HALL */
static int gpio_keys_pinctrl_configure(struct gpio_keys_drvdata *ddata,
bool active)
{
struct pinctrl_state *set_state;
int retval;
if (active) {
set_state =
pinctrl_lookup_state(ddata->key_pinctrl,
"tlmm_gpio_key_active");
if (IS_ERR(set_state)) {
dev_err(&ddata->input->dev,
"cannot get ts pinctrl active state\n");
return PTR_ERR(set_state);
}
} else {
set_state =
pinctrl_lookup_state(ddata->key_pinctrl,
"tlmm_gpio_key_suspend");
if (IS_ERR(set_state)) {
dev_err(&ddata->input->dev,
"cannot get gpiokey pinctrl sleep state\n");
return PTR_ERR(set_state);
}
}
retval = pinctrl_select_state(ddata->key_pinctrl, set_state);
if (retval) {
dev_err(&ddata->input->dev,
"cannot set ts pinctrl active state\n");
return retval;
}
return 0;
}
static int gpio_keys_open(struct input_dev *input)
{
struct gpio_keys_drvdata *ddata = input_get_drvdata(input);
const struct gpio_keys_platform_data *pdata = ddata->pdata;
int error;
#if defined(CONFIG_SENSORS_HALL)
int ret = 0;
int irq = gpio_to_irq(ddata->gpio_flip_cover);
if(ddata->gpio_flip_cover == 0) {
printk(KERN_DEBUG"[HALL_IC] : %s skip flip\n", __func__);
goto skip_flip;
}
printk(KERN_DEBUG"[HALL_IC] : %s\n", __func__);
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 < 0) {
printk(KERN_ERR "keys: failed to request flip cover irq %d gpio %d\n",
irq, ddata->gpio_flip_cover);
} else {
/* update the current status */
schedule_delayed_work(&ddata->flip_cover_dwork, HZ / 2);
}
skip_flip:
#endif
if (pdata->enable) {
error = pdata->enable(input->dev.parent);
if (error)
return error;
}
/* Report current state of buttons that are connected to GPIOs */
gpio_keys_report_state(ddata, false);
return 0;
}
static void gpio_keys_close(struct input_dev *input)
{
struct gpio_keys_drvdata *ddata = input_get_drvdata(input);
const struct gpio_keys_platform_data *pdata = ddata->pdata;
if (pdata->disable)
pdata->disable(input->dev.parent);
}
#if defined(CONFIG_SENSORS_HALL)
static ssize_t sysfs_hall_detect_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
if (flip_cover)
snprintf(buf, 6, "%s\n", "OPEN");
else
snprintf(buf, 7, "%s\n", "CLOSE");
return strlen(buf);
}
static DEVICE_ATTR(hall_detect, S_IRUGO, sysfs_hall_detect_show, NULL);
#endif
static ssize_t sysfs_key_onoff_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct gpio_keys_drvdata *ddata = dev_get_drvdata(dev);
int index ;
int state = 0;
for (index = 0; index < ddata->pdata->nbuttons; index++) {
struct gpio_button_data *button;
button = &ddata->data[index];
state = (__gpio_get_value(button->button->gpio) ? 1 : 0)\
^ button->button->active_low;
if (state == 1)
break;
}
#if defined(CONFIG_SEC_PM)
/* Volume down button tied in with PMIC RESIN. */
if (state == 0 && (get_vdkey_press() > 0))
state = 1;
#endif
pr_info("%s key state:%d\n", SECLOG, state);
return snprintf(buf, 5, "%d\n", state);
}
static DEVICE_ATTR(sec_key_pressed, 0444 , sysfs_key_onoff_show, NULL);
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->pdata->nbuttons; i++) {
struct gpio_button_data *button = &ddata->data[i];
if (button->button->type == EV_KEY) {
if (test_bit(button->button->code, bits))
button->button->wakeup = 1;
else
button->button->wakeup = 0;
pr_err("%s %s wakeup status %d\n", SECLOG, button->button->desc,
button->button->wakeup);
}
}
out:
kfree(bits);
return count;
}
static DEVICE_ATTR(wakeup_keys, 0220, NULL, wakeup_enable);
/*
* Handlers for alternative sources of platform_data
*/
#ifdef CONFIG_OF
/*
* Translate OpenFirmware node properties into platform_data
*/
static struct gpio_keys_platform_data *
gpio_keys_get_devtree_pdata(struct device *dev)
{
struct device_node *node, *pp;
struct gpio_keys_platform_data *pdata;
struct gpio_keys_button *button;
int error;
int nbuttons;
int i;
node = dev->of_node;
if (!node)
return ERR_PTR(-ENODEV);
nbuttons = of_get_child_count(node);
if (nbuttons == 0)
return ERR_PTR(-ENODEV);
pdata = devm_kzalloc(dev,
sizeof(*pdata) + nbuttons * sizeof(*button),
GFP_KERNEL);
if (!pdata)
return ERR_PTR(-ENOMEM);
pdata->buttons = (struct gpio_keys_button *)(pdata + 1);
pdata->nbuttons = nbuttons;
pdata->rep = !!of_get_property(node, "autorepeat", NULL);
pdata->name = of_get_property(node, "input-name", NULL);
pdata->use_syscore = of_property_read_bool(node, "use-syscore");
i = 0;
for_each_child_of_node(node, pp) {
int gpio;
enum of_gpio_flags flags;
if (!of_find_property(pp, "gpios", NULL)) {
pdata->nbuttons--;
dev_warn(dev, "Found button without gpios\n");
continue;
}
gpio = of_get_gpio_flags(pp, 0, &flags);
if (gpio < 0) {
error = gpio;
if (error != -EPROBE_DEFER)
dev_err(dev,
"Failed to get gpio flags, error: %d\n",
error);
return ERR_PTR(error);
}
button = &pdata->buttons[i++];
button->gpio = gpio;
button->active_low = flags & OF_GPIO_ACTIVE_LOW;
if (of_property_read_u32(pp, "linux,code", &button->code)) {
dev_err(dev, "Button without keycode: 0x%x\n",
button->gpio);
return ERR_PTR(-EINVAL);
}
button->desc = of_get_property(pp, "label", NULL);
#if defined(CONFIG_SENSORS_HALL)
if (button->code == SW_FLIP) {
pdata->gpio_flip_cover = button->gpio;
pdata->nbuttons--;
dev_info(dev, "[Hall_IC] device tree was founded\n");
continue;
}
#endif
if (of_property_read_u32(pp, "linux,input-type", &button->type))
button->type = EV_KEY;
button->wakeup = !!of_get_property(pp, "gpio-key,wakeup", NULL);
if (of_property_read_u32(pp, "debounce-interval",
&button->debounce_interval))
button->debounce_interval = 5;
}
if (pdata->nbuttons == 0)
return ERR_PTR(-EINVAL);
return pdata;
}
static const struct of_device_id gpio_keys_of_match[] = {
{ .compatible = "gpio-keys", },
{ },
};
MODULE_DEVICE_TABLE(of, gpio_keys_of_match);
#else
static inline struct gpio_keys_platform_data *
gpio_keys_get_devtree_pdata(struct device *dev)
{
return ERR_PTR(-ENODEV);
}
#endif
static int gpio_keys_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
const struct gpio_keys_platform_data *pdata = dev_get_platdata(dev);
struct gpio_keys_drvdata *ddata;
struct input_dev *input;
size_t size;
int i, error;
int wakeup = 0;
int ret;
struct pinctrl_state *set_state;
if (!pdata) {
pdata = gpio_keys_get_devtree_pdata(dev);
if (IS_ERR(pdata))
return PTR_ERR(pdata);
}
size = sizeof(struct gpio_keys_drvdata) +
pdata->nbuttons * sizeof(struct gpio_button_data);
ddata = devm_kzalloc(dev, size, GFP_KERNEL);
if (!ddata) {
dev_err(dev, "failed to allocate state\n");
return -ENOMEM;
}
input = devm_input_allocate_device(dev);
if (!input) {
dev_err(dev, "failed to allocate input device\n");
return -ENOMEM;
}
#if defined(CONFIG_SENSORS_HALL)
ddata->gpio_flip_cover = pdata->gpio_flip_cover;
ddata->irq_flip_cover = gpio_to_irq(ddata->gpio_flip_cover);
wake_lock_init(&ddata->flip_wake_lock, WAKE_LOCK_SUSPEND, "flip_wake_lock");
if(ddata->gpio_flip_cover != 0) {
input->evbit[0] |= BIT_MASK(EV_SW);
input_set_capability(input, EV_SW, SW_FLIP);
}
#endif
global_dev = dev;
ddata->pdata = pdata;
ddata->input = input;
mutex_init(&ddata->disable_lock);
platform_set_drvdata(pdev, ddata);
input_set_drvdata(input, ddata);
input->name = GPIO_KEYS_DEV_NAME;
input->phys = "gpio-keys/input0";
input->dev.parent = &pdev->dev;
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);
/* Get pinctrl if target uses pinctrl */
ddata->key_pinctrl = devm_pinctrl_get(dev);
if (IS_ERR(ddata->key_pinctrl)) {
if (PTR_ERR(ddata->key_pinctrl) == -EPROBE_DEFER)
return -EPROBE_DEFER;
pr_debug("Target does not use pinctrl\n");
ddata->key_pinctrl = NULL;
}
if (ddata->key_pinctrl) {
error = gpio_keys_pinctrl_configure(ddata, true);
if (error) {
dev_err(dev, "cannot set ts pinctrl active state\n");
return error;
}
}
for (i = 0; i < pdata->nbuttons; i++) {
struct gpio_keys_button *button = &pdata->buttons[i];
struct gpio_button_data *bdata = &ddata->data[i];
error = gpio_keys_setup_key(pdev, input, bdata, button);
if (error)
goto err_setup_key;
if (button->wakeup)
wakeup = 1;
}
sec_key = device_create(sec_class, NULL, 0, NULL, "sec_key");
if (IS_ERR(sec_key))
pr_err("Failed to create device(sec_key)!\n");
#if defined(CONFIG_SENSORS_HALL)
if (ddata->gpio_flip_cover != 0) {
ret = device_create_file(sec_key, &dev_attr_hall_detect);
if (ret < 0) {
pr_err("Failed to create device file(%s)!, error: %d\n",
dev_attr_hall_detect.attr.name, ret);
}
}
#endif
error = device_create_file(sec_key, &dev_attr_sec_key_pressed);
if (error) {
pr_err("Failed to create device file(%s), error: %d\n",
dev_attr_sec_key_pressed.attr.name, error);
}
error = device_create_file(sec_key, &dev_attr_wakeup_keys);
if (error < 0) {
pr_err("Failed to create device file(%s), error: %d\n",
dev_attr_wakeup_keys.attr.name, error);
}
dev_set_drvdata(sec_key, ddata);
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 err_create_sysfs;
}
error = input_register_device(input);
if (error) {
dev_err(dev, "Unable to register input device, error: %d\n",
error);
goto err_remove_group;
}
device_init_wakeup(&pdev->dev, wakeup);
if (pdata->use_syscore)
gpio_keys_syscore_pm_ops.resume = gpio_keys_syscore_resume;
register_syscore_ops(&gpio_keys_syscore_pm_ops);
return 0;
err_remove_group:
sysfs_remove_group(&pdev->dev.kobj, &gpio_keys_attr_group);
err_create_sysfs:
#if defined(CONFIG_SENSORS_HALL)
wake_lock_destroy(&ddata->flip_wake_lock);
#endif
err_setup_key:
if (ddata->key_pinctrl) {
set_state =
pinctrl_lookup_state(ddata->key_pinctrl,
"tlmm_gpio_key_suspend");
if (IS_ERR(set_state))
dev_err(dev, "cannot get gpiokey pinctrl sleep state\n");
else
pinctrl_select_state(ddata->key_pinctrl, set_state);
}
return error;
}
static int gpio_keys_remove(struct platform_device *pdev)
{
#if defined(CONFIG_SENSORS_HALL)
struct gpio_keys_drvdata *ddata = platform_get_drvdata(pdev);
wake_lock_destroy(&ddata->flip_wake_lock);
#endif
sysfs_remove_group(&pdev->dev.kobj, &gpio_keys_attr_group);
unregister_syscore_ops(&gpio_keys_syscore_pm_ops);
device_init_wakeup(&pdev->dev, 0);
return 0;
}
#ifdef CONFIG_PM_SLEEP
static void gpio_keys_syscore_resume(void)
{
struct gpio_keys_drvdata *ddata = dev_get_drvdata(global_dev);
struct input_dev *input = ddata->input;
struct gpio_button_data *bdata = NULL;
int error = 0;
int i;
if (ddata->key_pinctrl) {
error = gpio_keys_pinctrl_configure(ddata, true);
if (error) {
dev_err(global_dev, "failed to put the pin in resume state\n");
return;
}
}
if (device_may_wakeup(global_dev)) {
for (i = 0; i < ddata->pdata->nbuttons; i++) {
bdata = &ddata->data[i];
if (bdata->button->wakeup)
disable_irq_wake(bdata->irq);
}
} else {
mutex_lock(&input->mutex);
if (input->users)
error = gpio_keys_open(input);
mutex_unlock(&input->mutex);
}
if (error)
return;
gpio_keys_report_state(ddata, true);
}
static int gpio_keys_suspend(struct device *dev)
{
struct gpio_keys_drvdata *ddata = dev_get_drvdata(dev);
struct input_dev *input = ddata->input;
int i, ret;
if (ddata->key_pinctrl) {
ret = gpio_keys_pinctrl_configure(ddata, false);
if (ret) {
dev_err(dev, "failed to put the pin in suspend state\n");
return ret;
}
}
key_wakeup = false;
wakeup_reason = 0;
if (device_may_wakeup(dev)) {
for (i = 0; i < ddata->pdata->nbuttons; i++) {
struct gpio_button_data *bdata = &ddata->data[i];
if (bdata->button->wakeup)
enable_irq_wake(bdata->irq);
}
#if defined(CONFIG_SENSORS_HALL)
if(ddata->gpio_flip_cover != 0)
enable_irq_wake(ddata->irq_flip_cover);
#endif
} else {
mutex_lock(&input->mutex);
if (input->users)
gpio_keys_close(input);
mutex_unlock(&input->mutex);
}
return 0;
}
static int gpio_keys_resume(struct device *dev)
{
struct gpio_keys_drvdata *ddata = dev_get_drvdata(dev);
struct input_dev *input = ddata->input;
int error = 0;
int i;
if (ddata->pdata->use_syscore == true) {
dev_dbg(global_dev, "Using syscore resume, no need of this resume.\n");
return 0;
}
if (ddata->key_pinctrl) {
error = gpio_keys_pinctrl_configure(ddata, true);
if (error) {
dev_err(dev, "failed to put the pin in resume state\n");
return error;
}
}
if (device_may_wakeup(dev)) {
for (i = 0; i < ddata->pdata->nbuttons; i++) {
struct gpio_button_data *bdata = &ddata->data[i];
if (bdata->button->wakeup)
disable_irq_wake(bdata->irq);
}
} else {
mutex_lock(&input->mutex);
if (input->users)
error = gpio_keys_open(input);
mutex_unlock(&input->mutex);
}
#if defined(CONFIG_SENSORS_HALL)
#ifdef disable_irq_wake
if (device_may_wakeup(dev) && ddata->gpio_flip_cover != 0)
disable_irq_wake(ddata->irq_flip_cover);
#endif
#endif
if (error)
return error;
gpio_keys_report_state(ddata, true);
return 0;
}
#else
static void gpio_keys_syscore_resume(void){}
static int gpio_keys_suspend(struct device *dev)
{
return 0;
}
static int gpio_keys_resume(struct device *dev)
{
return 0;
}
#endif
static SIMPLE_DEV_PM_OPS(gpio_keys_pm_ops, gpio_keys_suspend, gpio_keys_resume);
static struct platform_driver gpio_keys_device_driver = {
.probe = gpio_keys_probe,
.remove = gpio_keys_remove,
.driver = {
.name = "gpio-keys",
.owner = THIS_MODULE,
.pm = &gpio_keys_pm_ops,
.of_match_table = of_match_ptr(gpio_keys_of_match),
}
};
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);
}
late_initcall(gpio_keys_init);
module_exit(gpio_keys_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Phil Blundell <pb@handhelds.org>");
MODULE_DESCRIPTION("Keyboard driver for GPIOs");
MODULE_ALIAS("platform:gpio-keys");
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