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path: root/drivers/input/sparse-keymap.c
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Diffstat (limited to 'drivers/input/sparse-keymap.c')
-rw-r--r--drivers/input/sparse-keymap.c99
1 files changed, 82 insertions, 17 deletions
diff --git a/drivers/input/sparse-keymap.c b/drivers/input/sparse-keymap.c
index 01424834476..e7409c45bdd 100644
--- a/drivers/input/sparse-keymap.c
+++ b/drivers/input/sparse-keymap.c
@@ -15,6 +15,7 @@
#include <linux/input.h>
#include <linux/input/sparse-keymap.h>
+#include <linux/module.h>
#include <linux/slab.h>
MODULE_AUTHOR("Dmitry Torokhov <dtor@mail.ru>");
@@ -22,6 +23,37 @@ MODULE_DESCRIPTION("Generic support for sparse keymaps");
MODULE_LICENSE("GPL v2");
MODULE_VERSION("0.1");
+static unsigned int sparse_keymap_get_key_index(struct input_dev *dev,
+ const struct key_entry *k)
+{
+ struct key_entry *key;
+ unsigned int idx = 0;
+
+ for (key = dev->keycode; key->type != KE_END; key++) {
+ if (key->type == KE_KEY) {
+ if (key == k)
+ break;
+ idx++;
+ }
+ }
+
+ return idx;
+}
+
+static struct key_entry *sparse_keymap_entry_by_index(struct input_dev *dev,
+ unsigned int index)
+{
+ struct key_entry *key;
+ unsigned int key_cnt = 0;
+
+ for (key = dev->keycode; key->type != KE_END; key++)
+ if (key->type == KE_KEY)
+ if (key_cnt++ == index)
+ return key;
+
+ return NULL;
+}
+
/**
* sparse_keymap_entry_from_scancode - perform sparse keymap lookup
* @dev: Input device using sparse keymap
@@ -64,16 +96,36 @@ struct key_entry *sparse_keymap_entry_from_keycode(struct input_dev *dev,
}
EXPORT_SYMBOL(sparse_keymap_entry_from_keycode);
+static struct key_entry *sparse_keymap_locate(struct input_dev *dev,
+ const struct input_keymap_entry *ke)
+{
+ struct key_entry *key;
+ unsigned int scancode;
+
+ if (ke->flags & INPUT_KEYMAP_BY_INDEX)
+ key = sparse_keymap_entry_by_index(dev, ke->index);
+ else if (input_scancode_to_scalar(ke, &scancode) == 0)
+ key = sparse_keymap_entry_from_scancode(dev, scancode);
+ else
+ key = NULL;
+
+ return key;
+}
+
static int sparse_keymap_getkeycode(struct input_dev *dev,
- unsigned int scancode,
- unsigned int *keycode)
+ struct input_keymap_entry *ke)
{
const struct key_entry *key;
if (dev->keycode) {
- key = sparse_keymap_entry_from_scancode(dev, scancode);
+ key = sparse_keymap_locate(dev, ke);
if (key && key->type == KE_KEY) {
- *keycode = key->keycode;
+ ke->keycode = key->keycode;
+ if (!(ke->flags & INPUT_KEYMAP_BY_INDEX))
+ ke->index =
+ sparse_keymap_get_key_index(dev, key);
+ ke->len = sizeof(key->code);
+ memcpy(ke->scancode, &key->code, sizeof(key->code));
return 0;
}
}
@@ -82,20 +134,19 @@ static int sparse_keymap_getkeycode(struct input_dev *dev,
}
static int sparse_keymap_setkeycode(struct input_dev *dev,
- unsigned int scancode,
- unsigned int keycode)
+ const struct input_keymap_entry *ke,
+ unsigned int *old_keycode)
{
struct key_entry *key;
- int old_keycode;
if (dev->keycode) {
- key = sparse_keymap_entry_from_scancode(dev, scancode);
+ key = sparse_keymap_locate(dev, ke);
if (key && key->type == KE_KEY) {
- old_keycode = key->keycode;
- key->keycode = keycode;
- set_bit(keycode, dev->keybit);
- if (!sparse_keymap_entry_from_keycode(dev, old_keycode))
- clear_bit(old_keycode, dev->keybit);
+ *old_keycode = key->keycode;
+ key->keycode = ke->keycode;
+ set_bit(ke->keycode, dev->keybit);
+ if (!sparse_keymap_entry_from_keycode(dev, *old_keycode))
+ clear_bit(*old_keycode, dev->keybit);
return 0;
}
}
@@ -129,11 +180,11 @@ int sparse_keymap_setup(struct input_dev *dev,
for (e = keymap; e->type != KE_END; e++)
map_size++;
- map = kcalloc(map_size, sizeof (struct key_entry), GFP_KERNEL);
+ map = kcalloc(map_size, sizeof(struct key_entry), GFP_KERNEL);
if (!map)
return -ENOMEM;
- memcpy(map, keymap, map_size * sizeof (struct key_entry));
+ memcpy(map, keymap, map_size * sizeof(struct key_entry));
for (i = 0; i < map_size; i++) {
entry = &map[i];
@@ -151,12 +202,19 @@ int sparse_keymap_setup(struct input_dev *dev,
break;
case KE_SW:
+ case KE_VSW:
__set_bit(EV_SW, dev->evbit);
__set_bit(entry->sw.code, dev->swbit);
break;
}
}
+ if (test_bit(EV_KEY, dev->evbit)) {
+ __set_bit(KEY_UNKNOWN, dev->keybit);
+ __set_bit(EV_MSC, dev->evbit);
+ __set_bit(MSC_SCAN, dev->mscbit);
+ }
+
dev->keycode = map;
dev->keycodemax = map_size;
dev->getkeycode = sparse_keymap_getkeycode;
@@ -167,7 +225,6 @@ int sparse_keymap_setup(struct input_dev *dev,
err_out:
kfree(map);
return error;
-
}
EXPORT_SYMBOL(sparse_keymap_setup);
@@ -179,7 +236,7 @@ EXPORT_SYMBOL(sparse_keymap_setup);
* in an input device that was set up by sparse_keymap_setup().
* NOTE: It is safe to cal this function while input device is
* still registered (however the drivers should care not to try to
- * use freed keymap and thus have to shut off interrups/polling
+ * use freed keymap and thus have to shut off interrupts/polling
* before freeing the keymap).
*/
void sparse_keymap_free(struct input_dev *dev)
@@ -218,6 +275,7 @@ void sparse_keymap_report_entry(struct input_dev *dev, const struct key_entry *k
{
switch (ke->type) {
case KE_KEY:
+ input_event(dev, EV_MSC, MSC_SCAN, ke->code);
input_report_key(dev, ke->keycode, value);
input_sync(dev);
if (value && autorelease) {
@@ -255,12 +313,19 @@ bool sparse_keymap_report_event(struct input_dev *dev, unsigned int code,
{
const struct key_entry *ke =
sparse_keymap_entry_from_scancode(dev, code);
+ struct key_entry unknown_ke;
if (ke) {
sparse_keymap_report_entry(dev, ke, value, autorelease);
return true;
}
+ /* Report an unknown key event as a debugging aid */
+ unknown_ke.type = KE_KEY;
+ unknown_ke.code = code;
+ unknown_ke.keycode = KEY_UNKNOWN;
+ sparse_keymap_report_entry(dev, &unknown_ke, value, true);
+
return false;
}
EXPORT_SYMBOL(sparse_keymap_report_event);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-06 21:07:21 +0000