aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/hid/hid-magicmouse.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/hid/hid-magicmouse.c')
-rw-r--r--drivers/hid/hid-magicmouse.c96
1 files changed, 73 insertions, 23 deletions
diff --git a/drivers/hid/hid-magicmouse.c b/drivers/hid/hid-magicmouse.c
index f10d56a15f21..319b0e57ee41 100644
--- a/drivers/hid/hid-magicmouse.c
+++ b/drivers/hid/hid-magicmouse.c
@@ -30,6 +30,21 @@ static bool emulate_scroll_wheel = true;
module_param(emulate_scroll_wheel, bool, 0644);
MODULE_PARM_DESC(emulate_scroll_wheel, "Emulate a scroll wheel");
+static unsigned int scroll_speed = 32;
+static int param_set_scroll_speed(const char *val, struct kernel_param *kp) {
+ unsigned long speed;
+ if (!val || strict_strtoul(val, 0, &speed) || speed > 63)
+ return -EINVAL;
+ scroll_speed = speed;
+ return 0;
+}
+module_param_call(scroll_speed, param_set_scroll_speed, param_get_uint, &scroll_speed, 0644);
+MODULE_PARM_DESC(scroll_speed, "Scroll speed, value from 0 (slow) to 63 (fast)");
+
+static bool scroll_acceleration = false;
+module_param(scroll_acceleration, bool, 0644);
+MODULE_PARM_DESC(scroll_acceleration, "Accelerate sequential scroll events");
+
static bool report_touches = true;
module_param(report_touches, bool, 0644);
MODULE_PARM_DESC(report_touches, "Emit touch records (otherwise, only use them for emulation)");
@@ -50,6 +65,8 @@ MODULE_PARM_DESC(report_undeciphered, "Report undeciphered multi-touch state fie
#define TOUCH_STATE_START 0x30
#define TOUCH_STATE_DRAG 0x40
+#define SCROLL_ACCEL_DEFAULT 7
+
/**
* struct magicmouse_sc - Tracks Magic Mouse-specific data.
* @input: Input device through which we report events.
@@ -78,8 +95,10 @@ struct magicmouse_sc {
struct {
short x;
short y;
+ short scroll_x;
short scroll_y;
u8 size;
+ u8 down;
} touches[16];
int tracking_ids[16];
};
@@ -141,7 +160,7 @@ static void magicmouse_emit_buttons(struct magicmouse_sc *msc, int state)
input_report_key(msc->input, BTN_RIGHT, state & 2);
if (state != last_state)
- msc->scroll_accel = 0;
+ msc->scroll_accel = SCROLL_ACCEL_DEFAULT;
}
static void magicmouse_emit_touch(struct magicmouse_sc *msc, int raw_id, u8 *tdata)
@@ -152,6 +171,7 @@ static void magicmouse_emit_touch(struct magicmouse_sc *msc, int raw_id, u8 *tda
int id = (misc >> 6) & 15;
int x = x_y << 12 >> 20;
int y = -(x_y >> 20);
+ int down = (tdata[7] & TOUCH_STATE_MASK) != TOUCH_STATE_NONE;
/* Store tracking ID and other fields. */
msc->tracking_ids[raw_id] = id;
@@ -160,42 +180,54 @@ static void magicmouse_emit_touch(struct magicmouse_sc *msc, int raw_id, u8 *tda
msc->touches[id].size = misc & 63;
/* If requested, emulate a scroll wheel by detecting small
- * vertical touch motions along the middle of the mouse.
+ * vertical touch motions.
*/
- if (emulate_scroll_wheel &&
- middle_button_start < x && x < middle_button_stop) {
- static const int accel_profile[] = {
- 256, 228, 192, 160, 128, 96, 64, 32,
- };
+ if (emulate_scroll_wheel) {
unsigned long now = jiffies;
- int step = msc->touches[id].scroll_y - y;
-
- /* Reset acceleration after half a second. */
- if (time_after(now, msc->scroll_jiffies + HZ / 2))
- msc->scroll_accel = 0;
+ int step_x = msc->touches[id].scroll_x - x;
+ int step_y = msc->touches[id].scroll_y - y;
/* Calculate and apply the scroll motion. */
switch (tdata[7] & TOUCH_STATE_MASK) {
case TOUCH_STATE_START:
+ msc->touches[id].scroll_x = x;
msc->touches[id].scroll_y = y;
- msc->scroll_accel = min_t(int, msc->scroll_accel + 1,
- ARRAY_SIZE(accel_profile) - 1);
+
+ /* Reset acceleration after half a second. */
+ if (scroll_acceleration && time_before(now,
+ msc->scroll_jiffies + HZ / 2))
+ msc->scroll_accel = max_t(int,
+ msc->scroll_accel - 1, 1);
+ else
+ msc->scroll_accel = SCROLL_ACCEL_DEFAULT;
+
break;
case TOUCH_STATE_DRAG:
- step = step / accel_profile[msc->scroll_accel];
- if (step != 0) {
- msc->touches[id].scroll_y = y;
+ step_x /= (64 - (int)scroll_speed) * msc->scroll_accel;
+ if (step_x != 0) {
+ msc->touches[id].scroll_x -= step_x *
+ (64 - scroll_speed) * msc->scroll_accel;
msc->scroll_jiffies = now;
- input_report_rel(input, REL_WHEEL, step);
+ input_report_rel(input, REL_HWHEEL, -step_x);
+ }
+
+ step_y /= (64 - (int)scroll_speed) * msc->scroll_accel;
+ if (step_y != 0) {
+ msc->touches[id].scroll_y -= step_y *
+ (64 - scroll_speed) * msc->scroll_accel;
+ msc->scroll_jiffies = now;
+ input_report_rel(input, REL_WHEEL, step_y);
}
break;
}
}
/* Generate the input events for this touch. */
- if (report_touches) {
+ if (report_touches && down) {
int orientation = (misc >> 10) - 32;
+ msc->touches[id].down = 1;
+
input_report_abs(input, ABS_MT_TRACKING_ID, id);
input_report_abs(input, ABS_MT_TOUCH_MAJOR, tdata[3]);
input_report_abs(input, ABS_MT_TOUCH_MINOR, tdata[4]);
@@ -215,7 +247,7 @@ static int magicmouse_raw_event(struct hid_device *hdev,
{
struct magicmouse_sc *msc = hid_get_drvdata(hdev);
struct input_dev *input = msc->input;
- int x, y, ts, ii, clicks;
+ int x, y, ts, ii, clicks, last_up;
switch (data[0]) {
case 0x10:
@@ -235,12 +267,26 @@ static int magicmouse_raw_event(struct hid_device *hdev,
msc->ntouches = (size - 6) / 8;
for (ii = 0; ii < msc->ntouches; ii++)
magicmouse_emit_touch(msc, ii, data + ii * 8 + 6);
+
+ if (report_touches) {
+ last_up = 1;
+ for (ii = 0; ii < ARRAY_SIZE(msc->touches); ii++) {
+ if (msc->touches[ii].down) {
+ last_up = 0;
+ msc->touches[ii].down = 0;
+ }
+ }
+ if (last_up) {
+ input_mt_sync(input);
+ }
+ }
+
/* When emulating three-button mode, it is important
* to have the current touch information before
* generating a click event.
*/
- x = (signed char)data[1];
- y = (signed char)data[2];
+ x = (int)(((data[3] & 0x0c) << 28) | (data[1] << 22)) >> 22;
+ y = (int)(((data[3] & 0x30) << 26) | (data[2] << 22)) >> 22;
clicks = data[3];
break;
case 0x20: /* Theoretically battery status (0-100), but I have
@@ -301,8 +347,10 @@ static void magicmouse_setup_input(struct input_dev *input, struct hid_device *h
__set_bit(EV_REL, input->evbit);
__set_bit(REL_X, input->relbit);
__set_bit(REL_Y, input->relbit);
- if (emulate_scroll_wheel)
+ if (emulate_scroll_wheel) {
__set_bit(REL_WHEEL, input->relbit);
+ __set_bit(REL_HWHEEL, input->relbit);
+ }
if (report_touches) {
__set_bit(EV_ABS, input->evbit);
@@ -345,6 +393,8 @@ static int magicmouse_probe(struct hid_device *hdev,
return -ENOMEM;
}
+ msc->scroll_accel = SCROLL_ACCEL_DEFAULT;
+
msc->quirks = id->driver_data;
hid_set_drvdata(hdev, msc);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.