HID: multitouch: support PixArt optical touch screen

commit b7ea95ff upstream.

This patch modifies hid-multitouch driver for supporting PixArt optical touch
screen.  Because of the device does not have to set initial report, we apply
"HID_QUIRK_NO_INIT_REPORTS" quirk and add the device into hid_blacklist[]
Signed-off-by: Aaron Tian <aaron_tian@pixart.com.tw>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

drivers/hid/Kconfig

@@ -350,6 +350,7 @@ config HID_MULTITOUCH
 	  - Lumio CrystalTouch panels
 	  - MosArt dual-touch panels
 	  - PenMount dual touch panels
+	  - PixArt optical touch screen
 	  - Pixcir dual touch panels
 	  - eGalax dual-touch panels, including the Joojoo and Wetab tablets
 	  - Stantum multitouch panels

drivers/hid/hid-core.c

@@ -1507,6 +1507,9 @@ static const struct hid_device_id hid_have_special_driver[] = {
 	{ HID_USB_DEVICE(USB_VENDOR_ID_ORTEK, USB_DEVICE_ID_ORTEK_WKB2000) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_PENMOUNT, USB_DEVICE_ID_PENMOUNT_PCI) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_PETALYNX, USB_DEVICE_ID_PETALYNX_MAXTER_REMOTE) },
+	{ HID_USB_DEVICE(USB_VENDOR_ID_PIXART, USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN) },
+	{ HID_USB_DEVICE(USB_VENDOR_ID_PIXART, USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN1) },
+	{ HID_USB_DEVICE(USB_VENDOR_ID_PIXART, USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN2) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_PRIMAX, USB_DEVICE_ID_PRIMAX_KEYBOARD) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_QUANTA, USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_QUANTA, USB_DEVICE_ID_PIXART_IMAGING_INC_OPTICAL_TOUCH_SCREEN) },

drivers/hid/hid-ids.h

@@ -593,6 +593,11 @@
 #define USB_VENDOR_ID_PI_ENGINEERING	0x05f3
 #define USB_DEVICE_ID_PI_ENGINEERING_VEC_USB_FOOTPEDAL	0xff
 
+#define USB_VENDOR_ID_PIXART				0x093a
+#define USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN	0x8001
+#define USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN1	0x8002
+#define USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN2	0x8003
+
 #define USB_VENDOR_ID_PLAYDOTCOM	0x0b43
 #define USB_DEVICE_ID_PLAYDOTCOM_EMS_USBII	0x0003
 

drivers/hid/hid-multitouch.c

@@ -93,6 +93,7 @@ struct mt_class {
 #define MT_CLS_DUAL_INRANGE_CONTACTID		0x0005
 #define MT_CLS_DUAL_INRANGE_CONTACTNUMBER	0x0006
 #define MT_CLS_DUAL_NSMU_CONTACTID		0x0007
+#define MT_CLS_INRANGE_CONTACTNUMBER		0x0009
 
 /* vendor specific classes */
 #define MT_CLS_3M				0x0101
@@ -155,6 +156,9 @@ struct mt_class mt_classes[] = {
 		.quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
 			MT_QUIRK_SLOT_IS_CONTACTID,
 		.maxcontacts = 2 },
+	{ .name = MT_CLS_INRANGE_CONTACTNUMBER,
+		.quirks = MT_QUIRK_VALID_IS_INRANGE |
+			MT_QUIRK_SLOT_IS_CONTACTNUMBER },
 
 	/*
 	 * vendor specific classes
@@ -744,6 +748,17 @@ static const struct hid_device_id mt_devices[] = {
 		HID_USB_DEVICE(USB_VENDOR_ID_PENMOUNT,
 			USB_DEVICE_ID_PENMOUNT_PCI) },
 
+	/* PixArt optical touch screen */
+	{ .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
+		HID_USB_DEVICE(USB_VENDOR_ID_PIXART,
+			USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN) },
+	{ .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
+		HID_USB_DEVICE(USB_VENDOR_ID_PIXART,
+			USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN1) },
+	{ .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
+		HID_USB_DEVICE(USB_VENDOR_ID_PIXART,
+			USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN2) },
+
 	/* PixCir-based panels */
 	{ .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
 		HID_USB_DEVICE(USB_VENDOR_ID_HANVON,

drivers/hid/usbhid/hid-quirks.c

@@ -68,6 +68,9 @@ static const struct hid_blacklist {
 	{ USB_VENDOR_ID_CH, USB_DEVICE_ID_CH_AXIS_295, HID_QUIRK_NOGET },
 	{ USB_VENDOR_ID_DMI, USB_DEVICE_ID_DMI_ENC, HID_QUIRK_NOGET },
 	{ USB_VENDOR_ID_ELO, USB_DEVICE_ID_ELO_TS2700, HID_QUIRK_NOGET },
+	{ USB_VENDOR_ID_PIXART, USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN, HID_QUIRK_NO_INIT_REPORTS },
+	{ USB_VENDOR_ID_PIXART, USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN1, HID_QUIRK_NO_INIT_REPORTS },
+	{ USB_VENDOR_ID_PIXART, USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN2, HID_QUIRK_NO_INIT_REPORTS },
 	{ USB_VENDOR_ID_PRODIGE, USB_DEVICE_ID_PRODIGE_CORDLESS, HID_QUIRK_NOGET },
 	{ USB_VENDOR_ID_QUANTA, USB_DEVICE_ID_PIXART_IMAGING_INC_OPTICAL_TOUCH_SCREEN, HID_QUIRK_NOGET },
 	{ USB_VENDOR_ID_SUN, USB_DEVICE_ID_RARITAN_KVM_DONGLE, HID_QUIRK_NOGET },