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path: root/drivers/input/input.c
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Diffstat (limited to 'drivers/input/input.c')
-rw-r--r--drivers/input/input.c85
1 files changed, 74 insertions, 11 deletions
diff --git a/drivers/input/input.c b/drivers/input/input.c
index a0be978501ff..f02c242c3114 100644
--- a/drivers/input/input.c
+++ b/drivers/input/input.c
@@ -493,7 +493,7 @@ static void input_disconnect_device(struct input_dev *dev)
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_bit(code, dev->key)) {
+ __test_and_clear_bit(code, dev->key)) {
input_pass_event(dev, EV_KEY, code, 0);
}
}
@@ -526,7 +526,7 @@ static int input_default_getkeycode(struct input_dev *dev,
if (!dev->keycodesize)
return -EINVAL;
- if (scancode < 0 || scancode >= dev->keycodemax)
+ if (scancode >= dev->keycodemax)
return -EINVAL;
*keycode = input_fetch_keycode(dev, scancode);
@@ -540,10 +540,7 @@ static int input_default_setkeycode(struct input_dev *dev,
int old_keycode;
int i;
- if (scancode < 0 || scancode >= dev->keycodemax)
- return -EINVAL;
-
- if (keycode < 0 || keycode > KEY_MAX)
+ if (scancode >= dev->keycodemax)
return -EINVAL;
if (!dev->keycodesize)
@@ -586,6 +583,75 @@ static int input_default_setkeycode(struct input_dev *dev,
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)
+{
+ unsigned long flags;
+ int old_keycode;
+ int retval;
+
+ if (scancode < 0)
+ return -EINVAL;
+
+ if (keycode < 0 || keycode > KEY_MAX)
+ return -EINVAL;
+
+ spin_lock_irqsave(&dev->event_lock, flags);
+
+ retval = dev->getkeycode(dev, scancode, &old_keycode);
+ if (retval)
+ goto out;
+
+ retval = dev->setkeycode(dev, scancode, keycode);
+ if (retval)
+ goto out;
+
+ /*
+ * Simulate keyup event if keycode is not present
+ * in the keymap anymore
+ */
+ if (test_bit(EV_KEY, dev->evbit) &&
+ !is_event_supported(old_keycode, dev->keybit, KEY_MAX) &&
+ __test_and_clear_bit(old_keycode, dev->key)) {
+
+ input_pass_event(dev, EV_KEY, old_keycode, 0);
+ if (dev->sync)
+ input_pass_event(dev, EV_SYN, SYN_REPORT, 1);
+ }
+
+ out:
+ spin_unlock_irqrestore(&dev->event_lock, flags);
+
+ return retval;
+}
+EXPORT_SYMBOL(input_set_keycode);
#define MATCH_BIT(bit, max) \
for (i = 0; i < BITS_TO_LONGS(max); i++) \
@@ -755,7 +821,7 @@ static int input_devices_seq_show(struct seq_file *seq, void *v)
return 0;
}
-static struct seq_operations input_devices_seq_ops = {
+static const struct seq_operations input_devices_seq_ops = {
.start = input_devices_seq_start,
.next = input_devices_seq_next,
.stop = input_devices_seq_stop,
@@ -808,7 +874,7 @@ static int input_handlers_seq_show(struct seq_file *seq, void *v)
return 0;
}
-static struct seq_operations input_handlers_seq_ops = {
+static const struct seq_operations input_handlers_seq_ops = {
.start = input_handlers_seq_start,
.next = input_handlers_seq_next,
.stop = input_handlers_seq_stop,
@@ -1329,9 +1395,6 @@ int input_register_device(struct input_dev *dev)
snprintf(dev->dev.bus_id, sizeof(dev->dev.bus_id),
"input%ld", (unsigned long) atomic_inc_return(&input_no) - 1);
- if (dev->cdev.dev)
- dev->dev.parent = dev->cdev.dev;
-
error = device_add(&dev->dev);
if (error)
return error;