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authorJiri Kosina <jkosina@suse.cz>2021-09-01 22:02:37 +0200
committerJiri Kosina <jkosina@suse.cz>2021-09-01 22:02:37 +0200
commit163a3124667901c29978bf67c0ffdcc9650515ac (patch)
tree7268d26870859f29aa6ff0e20ecc165536d04ca0
parent1138b3319242695dce82896e710c2290cf53770c (diff)
parent9d60648c607a2bfeef5e563e49de5d2e1b7a639a (diff)
Merge branch 'for-5.15/magicmouse' into for-linus
- High-resolution scroll support for Magicmouse devices
-rw-r--r--drivers/hid/hid-magicmouse.c52
1 files changed, 52 insertions, 0 deletions
diff --git a/drivers/hid/hid-magicmouse.c b/drivers/hid/hid-magicmouse.c
index 8bcaee4ccae0..686788ebf3e1 100644
--- a/drivers/hid/hid-magicmouse.c
+++ b/drivers/hid/hid-magicmouse.c
@@ -68,6 +68,10 @@ MODULE_PARM_DESC(report_undeciphered, "Report undeciphered multi-touch state fie
#define TOUCH_STATE_START 0x30
#define TOUCH_STATE_DRAG 0x40
+/* Number of high-resolution events for each low-resolution detent. */
+#define SCROLL_HR_STEPS 10
+#define SCROLL_HR_MULT (120 / SCROLL_HR_STEPS)
+#define SCROLL_HR_THRESHOLD 90 /* units */
#define SCROLL_ACCEL_DEFAULT 7
/* Touch surface information. Dimension is in hundredths of a mm, min and max
@@ -126,7 +130,11 @@ struct magicmouse_sc {
short y;
short scroll_x;
short scroll_y;
+ short scroll_x_hr;
+ short scroll_y_hr;
u8 size;
+ bool scroll_x_active;
+ bool scroll_y_active;
} touches[16];
int tracking_ids[16];
@@ -248,12 +256,20 @@ static void magicmouse_emit_touch(struct magicmouse_sc *msc, int raw_id, u8 *tda
unsigned long now = jiffies;
int step_x = msc->touches[id].scroll_x - x;
int step_y = msc->touches[id].scroll_y - y;
+ int step_hr = ((64 - (int)scroll_speed) * msc->scroll_accel) /
+ SCROLL_HR_STEPS;
+ int step_x_hr = msc->touches[id].scroll_x_hr - x;
+ int step_y_hr = msc->touches[id].scroll_y_hr - y;
/* Calculate and apply the scroll motion. */
switch (state) {
case TOUCH_STATE_START:
msc->touches[id].scroll_x = x;
msc->touches[id].scroll_y = y;
+ msc->touches[id].scroll_x_hr = x;
+ msc->touches[id].scroll_y_hr = y;
+ msc->touches[id].scroll_x_active = false;
+ msc->touches[id].scroll_y_active = false;
/* Reset acceleration after half a second. */
if (scroll_acceleration && time_before(now,
@@ -280,6 +296,40 @@ static void magicmouse_emit_touch(struct magicmouse_sc *msc, int raw_id, u8 *tda
msc->scroll_jiffies = now;
input_report_rel(input, REL_WHEEL, step_y);
}
+
+ if (!msc->touches[id].scroll_x_active &&
+ abs(step_x_hr) > SCROLL_HR_THRESHOLD) {
+ msc->touches[id].scroll_x_active = true;
+ msc->touches[id].scroll_x_hr = x;
+ step_x_hr = 0;
+ }
+
+ step_x_hr /= step_hr;
+ if (step_x_hr != 0 &&
+ msc->touches[id].scroll_x_active) {
+ msc->touches[id].scroll_x_hr -= step_x_hr *
+ step_hr;
+ input_report_rel(input,
+ REL_HWHEEL_HI_RES,
+ -step_x_hr * SCROLL_HR_MULT);
+ }
+
+ if (!msc->touches[id].scroll_y_active &&
+ abs(step_y_hr) > SCROLL_HR_THRESHOLD) {
+ msc->touches[id].scroll_y_active = true;
+ msc->touches[id].scroll_y_hr = y;
+ step_y_hr = 0;
+ }
+
+ step_y_hr /= step_hr;
+ if (step_y_hr != 0 &&
+ msc->touches[id].scroll_y_active) {
+ msc->touches[id].scroll_y_hr -= step_y_hr *
+ step_hr;
+ input_report_rel(input,
+ REL_WHEEL_HI_RES,
+ step_y_hr * SCROLL_HR_MULT);
+ }
break;
}
}
@@ -481,6 +531,8 @@ static int magicmouse_setup_input(struct input_dev *input, struct hid_device *hd
if (emulate_scroll_wheel) {
__set_bit(REL_WHEEL, input->relbit);
__set_bit(REL_HWHEEL, input->relbit);
+ __set_bit(REL_WHEEL_HI_RES, input->relbit);
+ __set_bit(REL_HWHEEL_HI_RES, input->relbit);
}
} else if (input->id.product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2) {
/* setting the device name to ensure the same driver settings