1 files changed, 101 insertions, 40 deletions

diff --git a/drivers/input/input.c b/drivers/input/input.c
index 3038c268917..9cb4b9a54f0 100644
--- a/drivers/input/input.c
+++ b/drivers/input/input.c
@@ -28,20 +28,6 @@ MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
 MODULE_DESCRIPTION("Input core");
 MODULE_LICENSE("GPL");
 
-EXPORT_SYMBOL(input_allocate_device);
-EXPORT_SYMBOL(input_register_device);
-EXPORT_SYMBOL(input_unregister_device);
-EXPORT_SYMBOL(input_register_handler);
-EXPORT_SYMBOL(input_unregister_handler);
-EXPORT_SYMBOL(input_grab_device);
-EXPORT_SYMBOL(input_release_device);
-EXPORT_SYMBOL(input_open_device);
-EXPORT_SYMBOL(input_close_device);
-EXPORT_SYMBOL(input_accept_process);
-EXPORT_SYMBOL(input_flush_device);
-EXPORT_SYMBOL(input_event);
-EXPORT_SYMBOL_GPL(input_class);
-
 #define INPUT_DEVICES   256
 
 static LIST_HEAD(input_dev_list);
@@ -49,6 +35,16 @@ static LIST_HEAD(input_handler_list);
 
 static struct input_handler *input_table[8];
 
+/**
+ * input_event() - report new input event
+ * @handle: device that generated the event
+ * @type: type of the event
+ * @code: event code
+ * @value: value of the event
+ *
+ * This function should be used by drivers implementing various input devices
+ * See also input_inject_event()
+ */
 void input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
 {
         struct input_handle *handle;
@@ -63,11 +59,13 @@ void input_event(struct input_dev *dev, unsigned int type, unsigned int code, in
                 case EV_SYN:
                         switch (code) {
                                 case SYN_CONFIG:
-                                        if (dev->event) dev->event(dev, type, code, value);
+                                        if (dev->event)
+                                                dev->event(dev, type, code, value);
                                         break;
 
                                 case SYN_REPORT:
-                                        if (dev->sync) return;
+                                        if (dev->sync)
+                                                return;
                                         dev->sync = 1;
                                         break;
                         }
@@ -136,7 +134,8 @@ void input_event(struct input_dev *dev, unsigned int type, unsigned int code, in
                         if (code > MSC_MAX || !test_bit(code, dev->mscbit))
                                 return;
 
-                        if (dev->event) dev->event(dev, type, code, value);
+                        if (dev->event)
+                                dev->event(dev, type, code, value);
 
                         break;
 
@@ -146,7 +145,9 @@ void input_event(struct input_dev *dev, unsigned int type, unsigned int code, in
                                 return;
 
                         change_bit(code, dev->led);
-                        if (dev->event) dev->event(dev, type, code, value);
+
+                        if (dev->event)
+                                dev->event(dev, type, code, value);
 
                         break;
 
@@ -158,21 +159,25 @@ void input_event(struct input_dev *dev, unsigned int type, unsigned int code, in
                         if (!!test_bit(code, dev->snd) != !!value)
                                 change_bit(code, dev->snd);
 
-                        if (dev->event) dev->event(dev, type, code, value);
+                        if (dev->event)
+                                dev->event(dev, type, code, value);
 
                         break;
 
                 case EV_REP:
 
-                        if (code > REP_MAX || value < 0 || dev->rep[code] == value) return;
+                        if (code > REP_MAX || value < 0 || dev->rep[code] == value)
+                                return;
 
                         dev->rep[code] = value;
-                        if (dev->event) dev->event(dev, type, code, value);
+                        if (dev->event)
+                                dev->event(dev, type, code, value);
 
                         break;
 
                 case EV_FF:
-                        if (dev->event) dev->event(dev, type, code, value);
+                        if (dev->event)
+                                dev->event(dev, type, code, value);
                         break;
         }
 
@@ -186,6 +191,24 @@ void input_event(struct input_dev *dev, unsigned int type, unsigned int code, in
                         if (handle->open)
                                 handle->handler->event(handle, type, code, value);
 }
+EXPORT_SYMBOL(input_event);
+
+/**
+ * input_inject_event() - send input event from input handler
+ * @handle: input handle to send event through
+ * @type: type of the event
+ * @code: event code
+ * @value: value of the event
+ *
+ * Similar to input_event() but will ignore event if device is "grabbed" and handle
+ * injecting event is not the one that owns the device.
+ */
+void input_inject_event(struct input_handle *handle, unsigned int type, unsigned int code, int value)
+{
+        if (!handle->dev->grab || handle->dev->grab == handle)
+                input_event(handle->dev, type, code, value);
+}
+EXPORT_SYMBOL(input_inject_event);
 
 static void input_repeat_key(unsigned long data)
 {
@@ -201,14 +224,6 @@ static void input_repeat_key(unsigned long data)
                 mod_timer(&dev->timer, jiffies + msecs_to_jiffies(dev->rep[REP_PERIOD]));
 }
 
-int input_accept_process(struct input_handle *handle, struct file *file)
-{
-        if (handle->dev->accept)
-                return handle->dev->accept(handle->dev, file);
-
-        return 0;
-}
-
 int input_grab_device(struct input_handle *handle)
 {
         if (handle->dev->grab)
@@ -217,12 +232,21 @@ int input_grab_device(struct input_handle *handle)
         handle->dev->grab = handle;
         return 0;
 }
+EXPORT_SYMBOL(input_grab_device);
 
 void input_release_device(struct input_handle *handle)
 {
-        if (handle->dev->grab == handle)
-                handle->dev->grab = NULL;
+        struct input_dev *dev = handle->dev;
+
+        if (dev->grab == handle) {
+                dev->grab = NULL;
+
+                list_for_each_entry(handle, &dev->h_list, d_node)
+                        if (handle->handler->start)
+                                handle->handler->start(handle);
+        }
 }
+EXPORT_SYMBOL(input_release_device);
 
 int input_open_device(struct input_handle *handle)
 {
@@ -245,6 +269,7 @@ int input_open_device(struct input_handle *handle)
 
         return err;
 }
+EXPORT_SYMBOL(input_open_device);
 
 int input_flush_device(struct input_handle* handle, struct file* file)
 {
@@ -253,6 +278,7 @@ int input_flush_device(struct input_handle* handle, struct file* file)
 
         return 0;
 }
+EXPORT_SYMBOL(input_flush_device);
 
 void input_close_device(struct input_handle *handle)
 {
@@ -268,6 +294,7 @@ void input_close_device(struct input_handle *handle)
 
         mutex_unlock(&dev->mutex);
 }
+EXPORT_SYMBOL(input_close_device);
 
 static void input_link_handle(struct input_handle *handle)
 {
@@ -335,9 +362,11 @@ static inline void input_wakeup_procfs_readers(void)
 static unsigned int input_proc_devices_poll(struct file *file, poll_table *wait)
 {
         int state = input_devices_state;
+
         poll_wait(file, &input_devices_poll_wait, wait);
         if (state != input_devices_state)
                 return POLLIN | POLLRDNORM;
+
         return 0;
 }
 
@@ -629,7 +658,7 @@ static ssize_t input_dev_show_modalias(struct class_device *dev, char *buf)
 
         len = input_print_modalias(buf, PAGE_SIZE, id, 1);
 
-        return max_t(int, len, PAGE_SIZE);
+        return min_t(int, len, PAGE_SIZE);
 }
 static CLASS_DEVICE_ATTR(modalias, S_IRUGO, input_dev_show_modalias, NULL);
 
@@ -862,6 +891,7 @@ struct class input_class = {
         .release                = input_dev_release,
         .uevent                 = input_dev_uevent,
 };
+EXPORT_SYMBOL_GPL(input_class);
 
 struct input_dev *input_allocate_device(void)
 {
@@ -872,12 +902,27 @@ struct input_dev *input_allocate_device(void)
                 dev->dynalloc = 1;
                 dev->cdev.class = &input_class;
                 class_device_initialize(&dev->cdev);
+                mutex_init(&dev->mutex);
                 INIT_LIST_HEAD(&dev->h_list);
                 INIT_LIST_HEAD(&dev->node);
         }
 
         return dev;
 }
+EXPORT_SYMBOL(input_allocate_device);
+
+void input_free_device(struct input_dev *dev)
+{
+        if (dev) {
+
+                mutex_lock(&dev->mutex);
+                dev->name = dev->phys = dev->uniq = NULL;
+                mutex_unlock(&dev->mutex);
+
+                input_put_device(dev);
+        }
+}
+EXPORT_SYMBOL(input_free_device);
 
 int input_register_device(struct input_dev *dev)
 {
@@ -895,7 +940,6 @@ int input_register_device(struct input_dev *dev)
                 return -EINVAL;
         }
 
-        mutex_init(&dev->mutex);
         set_bit(EV_SYN, dev->evbit);
 
         /*
@@ -944,8 +988,11 @@ int input_register_device(struct input_dev *dev)
         list_for_each_entry(handler, &input_handler_list, node)
                 if (!handler->blacklist || !input_match_device(handler->blacklist, dev))
                         if ((id = input_match_device(handler->id_table, dev)))
-                                if ((handle = handler->connect(handler, dev, id)))
+                                if ((handle = handler->connect(handler, dev, id))) {
                                         input_link_handle(handle);
+                                        if (handler->start)
+                                                handler->start(handle);
+                                }
 
         input_wakeup_procfs_readers();
 
@@ -956,12 +1003,14 @@ int input_register_device(struct input_dev *dev)
  fail1: class_device_del(&dev->cdev);
         return error;
 }
+EXPORT_SYMBOL(input_register_device);
 
 void input_unregister_device(struct input_dev *dev)
 {
-        struct list_head * node, * next;
+        struct list_head *node, *next;
 
-        if (!dev) return;
+        if (!dev)
+                return;
 
         del_timer_sync(&dev->timer);
 
@@ -977,10 +1026,16 @@ void input_unregister_device(struct input_dev *dev)
         sysfs_remove_group(&dev->cdev.kobj, &input_dev_caps_attr_group);
         sysfs_remove_group(&dev->cdev.kobj, &input_dev_id_attr_group);
         sysfs_remove_group(&dev->cdev.kobj, &input_dev_attr_group);
+
+        mutex_lock(&dev->mutex);
+        dev->name = dev->phys = dev->uniq = NULL;
+        mutex_unlock(&dev->mutex);
+
         class_device_unregister(&dev->cdev);
 
         input_wakeup_procfs_readers();
 }
+EXPORT_SYMBOL(input_unregister_device);
 
 void input_register_handler(struct input_handler *handler)
 {
@@ -988,7 +1043,8 @@ void input_register_handler(struct input_handler *handler)
         struct input_handle *handle;
         struct input_device_id *id;
 
-        if (!handler) return;
+        if (!handler)
+                return;
 
         INIT_LIST_HEAD(&handler->h_list);
 
@@ -1000,15 +1056,19 @@ void input_register_handler(struct input_handler *handler)
         list_for_each_entry(dev, &input_dev_list, node)
                 if (!handler->blacklist || !input_match_device(handler->blacklist, dev))
                         if ((id = input_match_device(handler->id_table, dev)))
-                                if ((handle = handler->connect(handler, dev, id)))
+                                if ((handle = handler->connect(handler, dev, id))) {
                                         input_link_handle(handle);
+                                        if (handler->start)
+                                                handler->start(handle);
+                                }
 
         input_wakeup_procfs_readers();
 }
+EXPORT_SYMBOL(input_register_handler);
 
 void input_unregister_handler(struct input_handler *handler)
 {
-        struct list_head * node, * next;
+        struct list_head *node, *next;
 
         list_for_each_safe(node, next, &handler->h_list) {
                 struct input_handle * handle = to_handle_h(node);
@@ -1024,6 +1084,7 @@ void input_unregister_handler(struct input_handler *handler)
 
         input_wakeup_procfs_readers();
 }
+EXPORT_SYMBOL(input_unregister_handler);
 
 static int input_open_file(struct inode *inode, struct file *file)
 {