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diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c
index 9d80635a91eb..7cd438cbb76c 100644
--- a/drivers/hid/hid-input.c
+++ b/drivers/hid/hid-input.c
@@ -14,6 +14,7 @@
*/
#include <linux/module.h>
+#include <linux/moduleparam.h>
#include <linux/slab.h>
#include <linux/kernel.h>
@@ -1505,6 +1506,63 @@ static void hid_report_set_tool(struct hid_report *report, struct input_dev *inp
report->tool = new_tool;
}
+
+struct fastmouse_state {
+ int division;
+ int x, y;
+};
+static struct fastmouse_state fastmouse = {
+ .division = 1,
+ .x = 0,
+ .y = 0,
+};
+
+static int set_division(const char *val, const struct kernel_param *kp) {
+ const int ret = kstrtoint(val, 0, &fastmouse.division);
+ if (ret != 0 || fastmouse.division <= 0) {
+ return -EINVAL;
+ }
+ // Modifying divison should reset accumlated events.
+ fastmouse.x = fastmouse.y = 0;
+
+ return ret;
+}
+
+static const struct kernel_param_ops division_ops = {
+ .set = set_division,
+ .get = param_get_int,
+};
+module_param_cb(division, &division_ops, &fastmouse.division, 0664);
+MODULE_PARM_DESC(division, "Mouse movement division amount (default: 1)");
+
+static int apply_fastmouse(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value) {
+ if (hid->type != HID_TYPE_USBMOUSE) {
+ return value;
+ }
+
+ if (usage->type != EV_REL) {
+ return value;
+ }
+
+ int* target;
+ switch (usage->code) {
+ case REL_X:
+ target = &fastmouse.x;
+ break;
+ case REL_Y:
+ target = &fastmouse.y;
+ break;
+ default:
+ return value;
+ };
+
+ *target += value;
+ const int result = *target / fastmouse.division;
+ *target %= fastmouse.division;
+
+ return result;
+}
+
void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value)
{
struct input_dev *input;
@@ -1713,6 +1771,7 @@ void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct
(!test_bit(usage->code, input->key)) == value)
input_event(input, EV_MSC, MSC_SCAN, usage->hid);
+ value = apply_fastmouse(hid, field, usage, value);
input_event(input, usage->type, usage->code, value);
if ((field->flags & HID_MAIN_ITEM_RELATIVE) &&
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