[PATCH] USB HID/HIDBP, INPUT DRIVERS: fix various usb/input/hid-input.c bugs that make Apple Mighty Mouse work poorly

Transposed lines of code in drivers/usb/input/hid-input.c causes the
capability bits for a new HID device to be set before quirks are applied
at configuration time.  When an HID event is then sent up to the input
layer, it may then be discarded as irrelevant because the wrong
capability bit is set.

Further, the quirks for the Apple Mighty Mouse are not quite right: the
horizontal scrolling needs its axis reversed, and the left and center
buttons are transposed.  Also, the mouse is labeled in the kernel with
its earlier name (I think) of Apple PowerMouse.

Steps to reproduce problem: Plug in an Apple Mighty Mouse.  Note that
horizontal scrolling doesn't work at all, and in fact doesn't generate
any input events on /dev/input/eventN.  Note also that pushing the
middle button performs the right button action, and vice versa.  Once
you have the horizontal scrolling working, note that it is backward WRT
both to vertical scrolling and to common sense.

This patch maybe should be broken up, as it does address two problems.
The transposed code in hidinput_configure_usage() probably creates bugs
beyond just the Mighty Mouse.  The rest of the patch renames POWERMOUSE
to MIGHTYMOUSE everywhere (which I *believe* is correct), fixes the
MIGHTYMOUSE quirk to swap the center and right mouse buttons, and adds a
new quirk HID_QUIRK_INVERT_HWHEEL also assigned to the MIGHTYMOUSE with
code in hidinput_hid_event() to implement it.

Signed-off-by: Bart Massey <bart@cs.pdx.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 22 insertions, 10 deletions

diff --git a/drivers/usb/input/hid-input.c b/drivers/usb/input/hid-input.c
index 25bc85f8ce39..2f665195f4ac 100644
--- a/drivers/usb/input/hid-input.c
+++ b/drivers/usb/input/hid-input.c
@@ -567,16 +567,14 @@ static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_fiel
                         break;
         }
 
-        set_bit(usage->type, input->evbit);
-
-        while (usage->code <= max && test_and_set_bit(usage->code, bit))
-                usage->code = find_next_zero_bit(bit, max + 1, usage->code);
-
-        if (usage->code > max)
-                goto ignore;
-
-        if (((device->quirks & (HID_QUIRK_2WHEEL_POWERMOUSE)) && (usage->hid == 0x00010032)))
-                map_rel(REL_HWHEEL);
+        if (device->quirks & HID_QUIRK_MIGHTYMOUSE) {
+                if (usage->hid == HID_GD_Z)
+                        map_rel(REL_HWHEEL);
+                else if (usage->code == BTN_1)
+                        map_key(BTN_2);
+                else if (usage->code == BTN_2)
+                        map_key(BTN_1);
+        }
 
         if ((device->quirks & (HID_QUIRK_2WHEEL_MOUSE_HACK_7 | HID_QUIRK_2WHEEL_MOUSE_HACK_5)) &&
                  (usage->type == EV_REL) && (usage->code == REL_WHEEL))
@@ -586,6 +584,15 @@ static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_fiel
                 || ((device->quirks & HID_QUIRK_2WHEEL_MOUSE_HACK_7) && (usage->hid == 0x00090007)))
                 goto ignore;
 
+        set_bit(usage->type, input->evbit);
+
+        while (usage->code <= max && test_and_set_bit(usage->code, bit))
+                usage->code = find_next_zero_bit(bit, max + 1, usage->code);
+
+        if (usage->code > max)
+                goto ignore;
+
+
         if (usage->type == EV_ABS) {
 
                 int a = field->logical_minimum;
@@ -647,6 +654,11 @@ void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct
                 return;
         }
 
+        if ((hid->quirks & HID_QUIRK_INVERT_HWHEEL) && (usage->code == REL_HWHEEL)) {
+                input_event(input, usage->type, usage->code, -value);
+                return;
+        }
+
         if ((hid->quirks & HID_QUIRK_2WHEEL_MOUSE_HACK_ON) && (usage->code == REL_WHEEL)) {
                 input_event(input, usage->type, REL_HWHEEL, value);
                 return;