1 files changed, 147 insertions, 51 deletions

diff --git a/drivers/input/input.c b/drivers/input/input.c
index 7919c2537225..d092ef9291da 100644
--- a/drivers/input/input.c
+++ b/drivers/input/input.c
@@ -171,7 +171,7 @@ static int input_handle_abs_event(struct input_dev *dev,
 	if (code == ABS_MT_SLOT) {
 		/*
 		 * "Stage" the event; we'll flush it later, when we
-		 * get actiual touch data.
+		 * get actual touch data.
 		 */
 		if (*pval >= 0 && *pval < dev->mtsize)
 			dev->slot = *pval;
@@ -188,7 +188,7 @@ static int input_handle_abs_event(struct input_dev *dev,
 		pold = &mtslot->abs[code - ABS_MT_FIRST];
 	} else {
 		/*
-		 * Bypass filtering for multitouch events when
+		 * Bypass filtering for multi-touch events when
 		 * not employing slots.
 		 */
 		pold = NULL;
@@ -634,78 +634,141 @@ static void input_disconnect_device(struct input_dev *dev)
 	spin_unlock_irq(&dev->event_lock);
 }
 
-static int input_fetch_keycode(struct input_dev *dev, int scancode)
+/**
+ * input_scancode_to_scalar() - converts scancode in &struct input_keymap_entry
+ * @ke: keymap entry containing scancode to be converted.
+ * @scancode: pointer to the location where converted scancode should
+ *	be stored.
+ *
+ * This function is used to convert scancode stored in &struct keymap_entry
+ * into scalar form understood by legacy keymap handling methods. These
+ * methods expect scancodes to be represented as 'unsigned int'.
+ */
+int input_scancode_to_scalar(const struct input_keymap_entry *ke,
+			     unsigned int *scancode)
+{
+	switch (ke->len) {
+	case 1:
+		*scancode = *((u8 *)ke->scancode);
+		break;
+
+	case 2:
+		*scancode = *((u16 *)ke->scancode);
+		break;
+
+	case 4:
+		*scancode = *((u32 *)ke->scancode);
+		break;
+
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL(input_scancode_to_scalar);
+
+/*
+ * Those routines handle the default case where no [gs]etkeycode() is
+ * defined. In this case, an array indexed by the scancode is used.
+ */
+
+static unsigned int input_fetch_keycode(struct input_dev *dev,
+					unsigned int index)
 {
 	switch (dev->keycodesize) {
-		case 1:
-			return ((u8 *)dev->keycode)[scancode];
+	case 1:
+		return ((u8 *)dev->keycode)[index];
 
-		case 2:
-			return ((u16 *)dev->keycode)[scancode];
+	case 2:
+		return ((u16 *)dev->keycode)[index];
 
-		default:
-			return ((u32 *)dev->keycode)[scancode];
+	default:
+		return ((u32 *)dev->keycode)[index];
 	}
 }
 
 static int input_default_getkeycode(struct input_dev *dev,
-				    unsigned int scancode,
-				    unsigned int *keycode)
+				    struct input_keymap_entry *ke)
 {
+	unsigned int index;
+	int error;
+
 	if (!dev->keycodesize)
 		return -EINVAL;
 
-	if (scancode >= dev->keycodemax)
+	if (ke->flags & INPUT_KEYMAP_BY_INDEX)
+		index = ke->index;
+	else {
+		error = input_scancode_to_scalar(ke, &index);
+		if (error)
+			return error;
+	}
+
+	if (index >= dev->keycodemax)
 		return -EINVAL;
 
-	*keycode = input_fetch_keycode(dev, scancode);
+	ke->keycode = input_fetch_keycode(dev, index);
+	ke->index = index;
+	ke->len = sizeof(index);
+	memcpy(ke->scancode, &index, sizeof(index));
 
 	return 0;
 }
 
 static int input_default_setkeycode(struct input_dev *dev,
-				    unsigned int scancode,
-				    unsigned int keycode)
+				    const struct input_keymap_entry *ke,
+				    unsigned int *old_keycode)
 {
-	int old_keycode;
+	unsigned int index;
+	int error;
 	int i;
 
-	if (scancode >= dev->keycodemax)
+	if (!dev->keycodesize)
 		return -EINVAL;
 
-	if (!dev->keycodesize)
+	if (ke->flags & INPUT_KEYMAP_BY_INDEX) {
+		index = ke->index;
+	} else {
+		error = input_scancode_to_scalar(ke, &index);
+		if (error)
+			return error;
+	}
+
+	if (index >= dev->keycodemax)
 		return -EINVAL;
 
-	if (dev->keycodesize < sizeof(keycode) && (keycode >> (dev->keycodesize * 8)))
+	if (dev->keycodesize < sizeof(dev->keycode) &&
+			(ke->keycode >> (dev->keycodesize * 8)))
 		return -EINVAL;
 
 	switch (dev->keycodesize) {
 		case 1: {
 			u8 *k = (u8 *)dev->keycode;
-			old_keycode = k[scancode];
-			k[scancode] = keycode;
+			*old_keycode = k[index];
+			k[index] = ke->keycode;
 			break;
 		}
 		case 2: {
 			u16 *k = (u16 *)dev->keycode;
-			old_keycode = k[scancode];
-			k[scancode] = keycode;
+			*old_keycode = k[index];
+			k[index] = ke->keycode;
 			break;
 		}
 		default: {
 			u32 *k = (u32 *)dev->keycode;
-			old_keycode = k[scancode];
-			k[scancode] = keycode;
+			*old_keycode = k[index];
+			k[index] = ke->keycode;
 			break;
 		}
 	}
 
-	__clear_bit(old_keycode, dev->keybit);
-	__set_bit(keycode, dev->keybit);
+	__clear_bit(*old_keycode, dev->keybit);
+	__set_bit(ke->keycode, dev->keybit);
 
 	for (i = 0; i < dev->keycodemax; i++) {
-		if (input_fetch_keycode(dev, i) == old_keycode) {
-			__set_bit(old_keycode, dev->keybit);
+		if (input_fetch_keycode(dev, i) == *old_keycode) {
+			__set_bit(*old_keycode, dev->keybit);
 			break; /* Setting the bit twice is useless, so break */
 		}
 	}
@@ -716,53 +779,86 @@ static int input_default_setkeycode(struct input_dev *dev,
 /**
  * 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
+ * @ke: keymap entry
  *
  * This function should be called by anyone interested in retrieving current
- * keymap. Presently keyboard and evdev handlers use it.
+ * keymap. Presently evdev handlers use it.
  */
-int input_get_keycode(struct input_dev *dev,
-		      unsigned int scancode, unsigned int *keycode)
+int input_get_keycode(struct input_dev *dev, struct input_keymap_entry *ke)
 {
 	unsigned long flags;
 	int retval;
 
 	spin_lock_irqsave(&dev->event_lock, flags);
-	retval = dev->getkeycode(dev, scancode, keycode);
-	spin_unlock_irqrestore(&dev->event_lock, flags);
 
+	if (dev->getkeycode) {
+		/*
+		 * Support for legacy drivers, that don't implement the new
+		 * ioctls
+		 */
+		u32 scancode = ke->index;
+
+		memcpy(ke->scancode, &scancode, sizeof(scancode));
+		ke->len = sizeof(scancode);
+		retval = dev->getkeycode(dev, scancode, &ke->keycode);
+	} else {
+		retval = dev->getkeycode_new(dev, ke);
+	}
+
+	spin_unlock_irqrestore(&dev->event_lock, flags);
 	return retval;
 }
 EXPORT_SYMBOL(input_get_keycode);
 
 /**
- * input_get_keycode - assign new keycode to a given scancode
+ * input_set_keycode - attribute a 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
+ * @ke: new keymap entry
  *
  * 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,
-		      unsigned int scancode, unsigned int keycode)
+		      const struct input_keymap_entry *ke)
 {
 	unsigned long flags;
 	unsigned int old_keycode;
 	int retval;
 
-	if (keycode > KEY_MAX)
+	if (ke->keycode > KEY_MAX)
 		return -EINVAL;
 
 	spin_lock_irqsave(&dev->event_lock, flags);
 
-	retval = dev->getkeycode(dev, scancode, &old_keycode);
-	if (retval)
-		goto out;
+	if (dev->setkeycode) {
+		/*
+		 * Support for legacy drivers, that don't implement the new
+		 * ioctls
+		 */
+		unsigned int scancode;
+
+		retval = input_scancode_to_scalar(ke, &scancode);
+		if (retval)
+			goto out;
+
+		/*
+		 * We need to know the old scancode, in order to generate a
+		 * keyup effect, if the set operation happens successfully
+		 */
+		if (!dev->getkeycode) {
+			retval = -EINVAL;
+			goto out;
+		}
+
+		retval = dev->getkeycode(dev, scancode, &old_keycode);
+		if (retval)
+			goto out;
+
+		retval = dev->setkeycode(dev, scancode, ke->keycode);
+	} else {
+		retval = dev->setkeycode_new(dev, ke, &old_keycode);
+	}
 
-	retval = dev->setkeycode(dev, scancode, keycode);
 	if (retval)
 		goto out;
 
@@ -1601,7 +1697,7 @@ EXPORT_SYMBOL(input_free_device);
  *
  * This function allocates all necessary memory for MT slot handling in the
  * input device, and adds ABS_MT_SLOT to the device capabilities. All slots
- * are initially marked as unused iby setting ABS_MT_TRACKING_ID to -1.
+ * are initially marked as unused by setting ABS_MT_TRACKING_ID to -1.
  */
 int input_mt_create_slots(struct input_dev *dev, unsigned int num_slots)
 {
@@ -1759,11 +1855,11 @@ int input_register_device(struct input_dev *dev)
 		dev->rep[REP_PERIOD] = 33;
 	}
 
-	if (!dev->getkeycode)
-		dev->getkeycode = input_default_getkeycode;
+	if (!dev->getkeycode && !dev->getkeycode_new)
+		dev->getkeycode_new = input_default_getkeycode;
 
-	if (!dev->setkeycode)
-		dev->setkeycode = input_default_setkeycode;
+	if (!dev->setkeycode && !dev->setkeycode_new)
+		dev->setkeycode_new = input_default_setkeycode;
 
 	dev_set_name(&dev->dev, "input%ld",
 		     (unsigned long) atomic_inc_return(&input_no) - 1);