1 files changed, 84 insertions, 0 deletions
diff --git a/fastmouse.patch b/fastmouse.patch
new file mode 100644
index 0000000..55dd0b5
--- /dev/null
+++ b/fastmouse.patch
@@ -0,0 +1,84 @@
+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) &&