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path: root/drivers/hid/hid-multitouch.c
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Diffstat (limited to 'drivers/hid/hid-multitouch.c')
-rw-r--r--drivers/hid/hid-multitouch.c26
1 files changed, 25 insertions, 1 deletions
diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index f65e78b46999..6a9b05b328a9 100644
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -42,7 +42,6 @@
#include <linux/hid.h>
#include <linux/module.h>
#include <linux/slab.h>
-#include <linux/usb.h>
#include <linux/input/mt.h>
#include <linux/string.h>
@@ -72,6 +71,8 @@ MODULE_LICENSE("GPL");
#define MT_INPUTMODE_TOUCHSCREEN 0x02
#define MT_INPUTMODE_TOUCHPAD 0x03
+#define MT_BUTTONTYPE_CLICKPAD 0
+
struct mt_slot {
__s32 x, y, cx, cy, p, w, h;
__s32 contactid; /* the device ContactID assigned to this slot */
@@ -116,6 +117,8 @@ struct mt_device {
__u8 touches_by_report; /* how many touches are present in one report:
* 1 means we should use a serial protocol
* > 1 means hybrid (multitouch) protocol */
+ __u8 buttons_count; /* number of physical buttons per touchpad */
+ bool is_buttonpad; /* is this device a button pad? */
bool serial_maybe; /* need to check for serial protocol */
bool curvalid; /* is the current contact valid? */
unsigned mt_flags; /* flags to pass to input-mt */
@@ -334,6 +337,16 @@ static void mt_feature_mapping(struct hid_device *hdev,
td->maxcontacts = td->mtclass.maxcontacts;
break;
+ case HID_DG_BUTTONTYPE:
+ if (usage->usage_index >= field->report_count) {
+ dev_err(&hdev->dev, "HID_DG_BUTTONTYPE out of range\n");
+ break;
+ }
+
+ if (field->value[usage->usage_index] == MT_BUTTONTYPE_CLICKPAD)
+ td->is_buttonpad = true;
+
+ break;
}
}
@@ -379,6 +392,10 @@ static int mt_touch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
td->inputmode_value = MT_INPUTMODE_TOUCHPAD;
}
+ /* count the buttons on touchpads */
+ if ((usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON)
+ td->buttons_count++;
+
if (usage->usage_index)
prev_usage = &field->usage[usage->usage_index - 1];
@@ -728,6 +745,13 @@ static void mt_touch_input_configured(struct hid_device *hdev,
if (cls->quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
td->mt_flags |= INPUT_MT_DROP_UNUSED;
+ /* check for clickpads */
+ if ((td->mt_flags & INPUT_MT_POINTER) && (td->buttons_count == 1))
+ td->is_buttonpad = true;
+
+ if (td->is_buttonpad)
+ __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
+
input_mt_init_slots(input, td->maxcontacts, td->mt_flags);
td->mt_flags = 0;