Put the touchpad in native (absolute coordinate mode) and export it to
userspace as a touchpad rather then as a mouse.
Note this requires HID_QUIRK_MULTI_INPUT as the T100CHI keyboard dock
has all functionality on a single HID interface and userspace expects
touchpads to be on a separate input_dev. Without MULTI_INPUT userspace
will ignore the keyboard part of the keyboard/touchpad combo.
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
---
drivers/hid/hid-asus.c | 74 +++++++++++++++++++++++++++++++++++++++++++++-----
1 file changed, 67 insertions(+), 7 deletions(-)
diff --git a/drivers/hid/hid-asus.c b/drivers/hid/hid-asus.c
index d5519479142f..b9804c7b9028 100644
--- a/drivers/hid/hid-asus.c
+++ b/drivers/hid/hid-asus.c
@@ -41,6 +41,7 @@ MODULE_DESCRIPTION("Asus HID Keyboard and TouchPad");
#define T100_TPAD_INTF 2
+#define T100CHI_MOUSE_REPORT_ID 0x06
#define FEATURE_REPORT_ID 0x0d
#define INPUT_REPORT_ID 0x5d
#define FEATURE_KBD_REPORT_ID 0x5a
@@ -117,6 +118,15 @@ static const struct asus_touchpad_info asus_t100ta_tp = {
.max_contacts = 5,
};
+static const struct asus_touchpad_info asus_t100chi_tp = {
+ .max_x = 2640,
+ .max_y = 1320,
+ .res_x = 31, /* units/mm */
+ .res_y = 29, /* units/mm */
+ .contact_size = 3,
+ .max_contacts = 4,
+};
+
static void asus_report_contact_down(struct asus_drvdata *drvdat,
int toolType, u8 *data)
{
@@ -126,6 +136,12 @@ static void asus_report_contact_down(struct asus_drvdata *drvdat,
x = (data[0] & CONTACT_X_MSB_MASK) << 4 | data[1];
y = drvdat->tp->max_y - ((data[0] & CONTACT_Y_MSB_MASK) << 8 | data[2]);
+ input_report_abs(input, ABS_MT_POSITION_X, x);
+ input_report_abs(input, ABS_MT_POSITION_Y, y);
+
+ if (drvdat->tp->contact_size < 5)
+ return;
+
if (toolType == MT_TOOL_PALM) {
touch_major = MAX_TOUCH_MAJOR;
pressure = MAX_PRESSURE;
@@ -134,8 +150,6 @@ static void asus_report_contact_down(struct asus_drvdata *drvdat,
pressure = data[4] & CONTACT_PRESSURE_MASK;
}
- input_report_abs(input, ABS_MT_POSITION_X, x);
- input_report_abs(input, ABS_MT_POSITION_Y, y);
input_report_abs(input, ABS_MT_TOUCH_MAJOR, touch_major);
input_report_abs(input, ABS_MT_PRESSURE, pressure);
}
@@ -147,6 +161,9 @@ static void asus_report_tool_width(struct asus_drvdata *drvdat)
struct input_mt_slot *oldest;
int oldid, count, i;
+ if (drvdat->tp->contact_size < 5)
+ return;
+
oldest = NULL;
oldid = mt->trkid;
count = 0;
@@ -172,7 +189,7 @@ static void asus_report_tool_width(struct asus_drvdata *drvdat)
static int asus_report_input(struct asus_drvdata *drvdat, u8 *data, int size)
{
- int i;
+ int i, toolType = MT_TOOL_FINGER;
u8 *contactData = data + 2;
if (size != 3 + drvdat->tp->contact_size * drvdat->tp->max_contacts)
@@ -180,7 +197,9 @@ static int asus_report_input(struct asus_drvdata *drvdat, u8 *data, int size)
for (i = 0; i < drvdat->tp->max_contacts; i++) {
bool down = !!(data[1] & BIT(i+3));
- int toolType = contactData[3] & CONTACT_TOOL_TYPE_MASK ?
+
+ if (drvdat->tp->contact_size >= 5)
+ toolType = contactData[3] & CONTACT_TOOL_TYPE_MASK ?
MT_TOOL_PALM : MT_TOOL_FINGER;
input_mt_slot(drvdat->input, i);
@@ -359,6 +378,11 @@ static int asus_input_configured(struct hid_device *hdev, struct hid_input *hi)
struct input_dev *input = hi->input;
struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
+ /* T100CHI uses MULTI_INPUT, bind the touchpad to the mouse hid_input */
+ if (drvdata->quirks & QUIRK_T100CHI &&
+ hi->report->id != T100CHI_MOUSE_REPORT_ID)
+ return 0;
+
if (drvdata->tp) {
int ret;
@@ -368,9 +392,15 @@ static int asus_input_configured(struct hid_device *hdev, struct hid_input *hi)
drvdata->tp->max_y, 0, 0);
input_abs_set_res(input, ABS_MT_POSITION_X, drvdata->tp->res_x);
input_abs_set_res(input, ABS_MT_POSITION_Y, drvdata->tp->res_y);
- input_set_abs_params(input, ABS_TOOL_WIDTH, 0, MAX_TOUCH_MAJOR, 0, 0);
- input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0, MAX_TOUCH_MAJOR, 0, 0);
- input_set_abs_params(input, ABS_MT_PRESSURE, 0, MAX_PRESSURE, 0, 0);
+
+ if (drvdata->tp->contact_size >= 5) {
+ input_set_abs_params(input, ABS_TOOL_WIDTH, 0,
+ MAX_TOUCH_MAJOR, 0, 0);
+ input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0,
+ MAX_TOUCH_MAJOR, 0, 0);
+ input_set_abs_params(input, ABS_MT_PRESSURE, 0,
+ MAX_PRESSURE, 0, 0);
+ }
__set_bit(BTN_LEFT, input->keybit);
__set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
@@ -408,6 +438,26 @@ static int asus_input_mapping(struct hid_device *hdev,
return -1;
}
+ /*
+ * Ignore a bunch of bogus collections in the T100CHI descriptor.
+ * This avoids a bunch of non-functional hid_input devices getting
+ * created because of the T100CHI using HID_QUIRK_MULTI_INPUT.
+ */
+ if (drvdata->quirks & QUIRK_T100CHI) {
+ if (field->application == (HID_UP_GENDESK | 0x0080) ||
+ usage->hid == (HID_UP_GENDEVCTRLS | 0x0024) ||
+ usage->hid == (HID_UP_GENDEVCTRLS | 0x0025) ||
+ usage->hid == (HID_UP_GENDEVCTRLS | 0x0026))
+ return -1;
+ /*
+ * We use the hid_input for the mouse report for the touchpad,
+ * keep the left button, to avoid the core removing it.
+ */
+ if (field->application == HID_GD_MOUSE &&
+ usage->hid != (HID_UP_BUTTON | 1))
+ return -1;
+ }
+
/* ASUS-specific keyboard hotkeys */
if ((usage->hid & HID_USAGE_PAGE) == 0xff310000) {
set_bit(EV_REP, hi->input->evbit);
@@ -532,6 +582,16 @@ static int asus_probe(struct hid_device *hdev, const struct hid_device_id *id)
}
}
+ if (drvdata->quirks & QUIRK_T100CHI) {
+ /*
+ * All functionality is on a single HID interface and for
+ * userspace the touchpad must be a separate input_dev.
+ */
+ hdev->quirks |= HID_QUIRK_MULTI_INPUT |
+ HID_QUIRK_NO_EMPTY_INPUT;
+ drvdata->tp = &asus_t100chi_tp;
+ }
+
if (drvdata->quirks & QUIRK_NO_INIT_REPORTS)
hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
--
2.13.0
--
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