+/*
+ * Prepare device for unregistering
+ */
+static void input_disconnect_device(struct input_dev *dev)
+{
+ struct input_handle *handle;
+ int code;
+
+ /*
+ * Mark device as going away. Note that we take dev->mutex here
+ * not to protect access to dev->going_away but rather to ensure
+ * that there are no threads in the middle of input_open_device()
+ */
+ mutex_lock(&dev->mutex);
+ dev->going_away = true;
+ mutex_unlock(&dev->mutex);
+
+ spin_lock_irq(&dev->event_lock);
+
+ /*
+ * Simulate keyup events for all pressed keys so that handlers
+ * are not left with "stuck" keys. The driver may continue
+ * generate events even after we done here but they will not
+ * reach any handlers.
+ */
+ if (is_event_supported(EV_KEY, dev->evbit, EV_MAX)) {
+ for (code = 0; code <= KEY_MAX; code++) {
+ if (is_event_supported(code, dev->keybit, KEY_MAX) &&
+ __test_and_clear_bit(code, dev->key)) {
+ input_pass_event(dev, EV_KEY, code, 0);
+ }
+ }
+ input_pass_event(dev, EV_SYN, SYN_REPORT, 1);
+ }
+
+ list_for_each_entry(handle, &dev->h_list, d_node)
+ handle->open = 0;
+
+ spin_unlock_irq(&dev->event_lock);
+}
+
+static int input_fetch_keycode(struct input_dev *dev, int scancode)
+{
+ switch (dev->keycodesize) {
+ case 1:
+ return ((u8 *)dev->keycode)[scancode];
+
+ case 2:
+ return ((u16 *)dev->keycode)[scancode];
+
+ default:
+ return ((u32 *)dev->keycode)[scancode];
+ }
+}
+
+static int input_default_getkeycode(struct input_dev *dev,
+ int scancode, int *keycode)
+{
+ if (!dev->keycodesize)
+ return -EINVAL;
+
+ if (scancode >= dev->keycodemax)
+ return -EINVAL;
+
+ *keycode = input_fetch_keycode(dev, scancode);
+
+ return 0;
+}
+
+static int input_default_setkeycode(struct input_dev *dev,
+ int scancode, int keycode)
+{
+ int old_keycode;
+ int i;
+
+ if (scancode >= dev->keycodemax)
+ return -EINVAL;
+
+ if (!dev->keycodesize)
+ return -EINVAL;
+
+ if (dev->keycodesize < sizeof(keycode) && (keycode >> (dev->keycodesize * 8)))
+ return -EINVAL;
+
+ switch (dev->keycodesize) {
+ case 1: {
+ u8 *k = (u8 *)dev->keycode;
+ old_keycode = k[scancode];
+ k[scancode] = keycode;
+ break;
+ }
+ case 2: {
+ u16 *k = (u16 *)dev->keycode;
+ old_keycode = k[scancode];
+ k[scancode] = keycode;
+ break;
+ }
+ default: {
+ u32 *k = (u32 *)dev->keycode;
+ old_keycode = k[scancode];
+ k[scancode] = keycode;
+ break;
+ }
+ }
+
+ clear_bit(old_keycode, dev->keybit);
+ set_bit(keycode, dev->keybit);
+
+ for (i = 0; i < dev->keycodemax; i++) {
+ if (input_fetch_keycode(dev, i) == old_keycode) {
+ set_bit(old_keycode, dev->keybit);
+ break; /* Setting the bit twice is useless, so break */
+ }
+ }
+
+ return 0;
+}
+
+/**
+ * input_get_keycode - retrieve keycode currently mapped to a given scancode
+ * @dev: input device which keymap is being queried
+ * @scancode: scancode (or its equivalent for device in question) for which
+ * keycode is needed
+ * @keycode: result
+ *
+ * This function should be called by anyone interested in retrieving current
+ * keymap. Presently keyboard and evdev handlers use it.
+ */
+int input_get_keycode(struct input_dev *dev, int scancode, int *keycode)
+{
+ if (scancode < 0)
+ return -EINVAL;
+
+ return dev->getkeycode(dev, scancode, keycode);
+}
+EXPORT_SYMBOL(input_get_keycode);
+
+/**
+ * input_get_keycode - assign new keycode to a given scancode
+ * @dev: input device which keymap is being updated
+ * @scancode: scancode (or its equivalent for device in question)
+ * @keycode: new keycode to be assigned to the scancode
+ *
+ * This function should be called by anyone needing to update current
+ * keymap. Presently keyboard and evdev handlers use it.
+ */
+int input_set_keycode(struct input_dev *dev, int scancode, int keycode)