[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>

drivers/usb/input/hid-core.c

@@ -1549,7 +1549,7 @@ void hid_init_reports(struct hid_device *hid)
 #define USB_DEVICE_ID_LD_MACHINETEST	0x2040
 
 #define USB_VENDOR_ID_APPLE		0x05ac
-#define USB_DEVICE_ID_APPLE_POWERMOUSE	0x0304
+#define USB_DEVICE_ID_APPLE_MIGHTYMOUSE	0x0304
 
 #define USB_VENDOR_ID_CHERRY		0x046a
 #define USB_DEVICE_ID_CHERRY_CYMOTION	0x0023
@@ -1692,7 +1692,7 @@ static const struct hid_blacklist {
 	{ USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_DUAL_USB_JOYPAD, HID_QUIRK_NOGET | HID_QUIRK_MULTI_INPUT },
 	{ USB_VENDOR_ID_SILVERCREST, USB_DEVICE_ID_SILVERCREST_KB, HID_QUIRK_NOGET },
 
-	{ USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_POWERMOUSE, HID_QUIRK_2WHEEL_POWERMOUSE },
+	{ USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_MIGHTYMOUSE, HID_QUIRK_MIGHTYMOUSE | HID_QUIRK_INVERT_HWHEEL },
 	{ USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_WCP32PU, HID_QUIRK_2WHEEL_MOUSE_HACK_7 },
 	{ USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_MOUSE, HID_QUIRK_2WHEEL_MOUSE_HACK_5 },
 

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;

drivers/usb/input/hid.h

@@ -247,10 +247,11 @@ struct hid_item {
 #define HID_QUIRK_2WHEEL_MOUSE_HACK_7		0x00000080
 #define HID_QUIRK_2WHEEL_MOUSE_HACK_5		0x00000100
 #define HID_QUIRK_2WHEEL_MOUSE_HACK_ON		0x00000200
-#define HID_QUIRK_2WHEEL_POWERMOUSE		0x00000400
+#define HID_QUIRK_MIGHTYMOUSE			0x00000400
 #define HID_QUIRK_CYMOTION			0x00000800
 #define HID_QUIRK_POWERBOOK_HAS_FN		0x00001000
 #define HID_QUIRK_POWERBOOK_FN_ON		0x00002000
+#define HID_QUIRK_INVERT_HWHEEL			0x00004000
 
 /*
  * This is the global environment of the parser. This information is