Input: psmouse - add support for Intellimouse 4.0

Add support for the H-Wheel present on Microsoft Intellimouse 4.0
(AKA "tilt mouse")

Signed-off-by: Pozsar Balazs <pozsy@uhulinux.hu>
Signed-off-by: Vojtech Pavlik <vojtech@suse.cz>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

diff --git a/drivers/input/mouse/psmouse-base.c b/drivers/input/mouse/psmouse-base.c
index 5f21532c24ffc2530fc3a7a241bc61e44f191da4..8bc9f51ae6c26668c14353e6bab43145e86aa5a1 100644 (file)
--- a/drivers/input/mouse/psmouse-base.c
+++ b/drivers/input/mouse/psmouse-base.c
@@ -150,9 +150,20 @@ static psmouse_ret_t psmouse_process_byte(struct psmouse *psmouse, struct pt_reg
  */
 
        if (psmouse->type == PSMOUSE_IMEX) {
-               input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 8) - (int) (packet[3] & 7));
-               input_report_key(dev, BTN_SIDE, (packet[3] >> 4) & 1);
-               input_report_key(dev, BTN_EXTRA, (packet[3] >> 5) & 1);
+               switch (packet[3] & 0xC0) {
+                       case 0x80: /* vertical scroll on IntelliMouse Explorer 4.0 */
+                               input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 32) - (int) (packet[3] & 31));
+                               break;
+                       case 0x40: /* horizontal scroll on IntelliMouse Explorer 4.0 */
+                               input_report_rel(dev, REL_HWHEEL, (int) (packet[3] & 32) - (int) (packet[3] & 31));
+                               break;
+                       case 0x00:
+                       case 0xC0:
+                               input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 8) - (int) (packet[3] & 7));
+                               input_report_key(dev, BTN_SIDE, (packet[3] >> 4) & 1);
+                               input_report_key(dev, BTN_EXTRA, (packet[3] >> 5) & 1);
+                               break;
+               }
        }
 
 /*
@@ -466,9 +477,25 @@ static int im_explorer_detect(struct psmouse *psmouse, int set_properties)
        if (param[0] != 4)
                return -1;
 
+/* Magic to enable horizontal scrolling on IntelliMouse 4.0 */
+       param[0] = 200;
+       ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
+       param[0] =  80;
+       ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
+       param[0] =  40;
+       ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
+
+       param[0] = 200;
+       ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
+       param[0] = 200;
+       ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
+       param[0] =  60;
+       ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
+
        if (set_properties) {
                set_bit(BTN_MIDDLE, psmouse->dev->keybit);
                set_bit(REL_WHEEL, psmouse->dev->relbit);
+               set_bit(REL_HWHEEL, psmouse->dev->relbit);
                set_bit(BTN_SIDE, psmouse->dev->keybit);
                set_bit(BTN_EXTRA, psmouse->dev->keybit);