1 files changed, 34 insertions, 0 deletions

diff --git a/drivers/hid/hid-input-quirks.c b/drivers/hid/hid-input-quirks.c
index 7f2f80b00d74..e378b4a5eeac 100644
--- a/drivers/hid/hid-input-quirks.c
+++ b/drivers/hid/hid-input-quirks.c
@@ -253,6 +253,27 @@ static int quirk_cherry_genius_29e(struct hid_usage *usage, struct input_dev *in
         return 1;
 }
 
+static int quirk_btc_8193(struct hid_usage *usage, struct input_dev *input,
+                              unsigned long *bit, int *max)
+{
+        if ((usage->hid & HID_USAGE_PAGE) != HID_UP_CONSUMER)
+                return 0;
+
+        switch (usage->hid & HID_USAGE) {
+                case 0x230: map_key(BTN_MOUSE);                 break;
+                case 0x231: map_rel(REL_WHEEL);                 break;
+                /* 
+                 * this keyboard has a scrollwheel implemented in
+                 * totally broken way. We map this usage temporarily
+                 * to HWHEEL and handle it in the event quirk handler
+                 */
+                case 0x232: map_rel(REL_HWHEEL);                break;
+
+                default:
+                        return 0;
+        }
+        return 1;
+}
 
 #define VENDOR_ID_BELKIN                        0x1020
 #define DEVICE_ID_BELKIN_WIRELESS_KEYBOARD      0x0006
@@ -263,6 +284,9 @@ static int quirk_cherry_genius_29e(struct hid_usage *usage, struct input_dev *in
 #define VENDOR_ID_CHICONY                       0x04f2
 #define DEVICE_ID_CHICONY_TACTICAL_PAD          0x0418
 
+#define VENDOR_ID_EZKEY                         0x0518
+#define DEVICE_ID_BTC_8193                      0x0002
+
 #define VENDOR_ID_LOGITECH                      0x046d
 #define DEVICE_ID_LOGITECH_RECEIVER             0xc101
 #define DEVICE_ID_S510_RECEIVER                 0xc50c
@@ -291,6 +315,8 @@ static const struct hid_input_blacklist {
 
         { VENDOR_ID_CHICONY, DEVICE_ID_CHICONY_TACTICAL_PAD, quirk_chicony_tactical_pad },
 
+        { VENDOR_ID_EZKEY, DEVICE_ID_BTC_8193, quirk_btc_8193 },
+
         { VENDOR_ID_LOGITECH, DEVICE_ID_LOGITECH_RECEIVER, quirk_logitech_ultrax_remote },
         { VENDOR_ID_LOGITECH, DEVICE_ID_S510_RECEIVER, quirk_logitech_wireless },
         { VENDOR_ID_LOGITECH, DEVICE_ID_S510_RECEIVER_2, quirk_logitech_wireless },
@@ -323,6 +349,7 @@ int hidinput_mapping_quirks(struct hid_usage *usage,
         return 0;
 }
 
+#define IS_BTC8193(x) (x->vendor == 0x0518 && x->product == 0x0002)
 #define IS_MS_KB(x) (x->vendor == 0x045e && (x->product == 0x00db || x->product == 0x00f9))
 
 void hidinput_event_quirks(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value)
@@ -384,6 +411,13 @@ void hidinput_event_quirks(struct hid_device *hid, struct hid_field *field, stru
                         input_event(input, usage->type, last_key, 0);
                 }
         }
+
+        /* handle the temporary quirky mapping to HWHEEL */
+        if (hid->quirks & HID_QUIRK_HWHEEL_WHEEL_INVERT &&
+                        usage->type == EV_REL && usage->code == REL_HWHEEL) {
+                input_event(input, usage->type, REL_WHEEL, -value);
+                return;
+        }
 }