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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.c192
1 files changed, 144 insertions, 48 deletions
diff --git a/drivers/input/input.c b/drivers/input/input.c
index acb3c8095c6..832771e7366 100644
--- a/drivers/input/input.c
+++ b/drivers/input/input.c
@@ -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;
@@ -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);
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-26 22:13:03 +0000