HID: Sunplus Wireless Desktop needs report descriptor fixup

This device has reports lower logical maximum compared to the real
usages for Zoom+ and Zoom- it emits.

This patch bumps the values in the report descriptor up, and also
adjusts HID_MAX_USAGE accordingly.

Reported-by: Khelben Blackstaff <[e-mail]>
Signed-off-by: Jiri Kosina <[e-mail]>

drivers/hid/hid-input-quirks.c

···
 	return 1;
 }
 
+static int quirk_sunplus_wdesktop(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 0x2003: map_key_clear(KEY_ZOOMIN);		break;
+		case 0x2103: map_key_clear(KEY_ZOOMOUT);	break;
+		default:
+			return 0;
+	}
+	return 1;
+}
+
 #define VENDOR_ID_BELKIN			0x1020
 #define DEVICE_ID_BELKIN_WIRELESS_KEYBOARD	0x0006
 
···
 #define VENDOR_ID_PETALYNX			0x18b1
 #define DEVICE_ID_PETALYNX_MAXTER_REMOTE	0x0037
 
+#define VENDOR_ID_SUNPLUS			0x04fc
+#define DEVICE_ID_SUNPLUS_WDESKTOP		0x05d8
+
 static const struct hid_input_blacklist {
 	__u16 idVendor;
 	__u16 idProduct;
···
 	{ VENDOR_ID_MONTEREY, DEVICE_ID_GENIUS_KB29E, quirk_cherry_genius_29e },
 
 	{ VENDOR_ID_PETALYNX, DEVICE_ID_PETALYNX_MAXTER_REMOTE, quirk_petalynx_remote },
-	
+
+	{ VENDOR_ID_SUNPLUS, DEVICE_ID_SUNPLUS_WDESKTOP, quirk_sunplus_wdesktop },
+
 	{ 0, 0, 0 }
 };
 

drivers/hid/usbhid/hid-quirks.c

···
 #define USB_VENDOR_ID_SUN		0x0430
 #define USB_DEVICE_ID_RARITAN_KVM_DONGLE	0xcdab
 
+#define USB_VENDOR_ID_SUNPLUS		0x04fc
+#define USB_DEVICE_ID_SUNPLUS_WDESKTOP	0x05d8
+
 #define USB_VENDOR_ID_TOPMAX		0x0663
 #define USB_DEVICE_ID_TOPMAX_COBRAPAD	0x0103
 
···
 
 	{ USB_VENDOR_ID_SAMSUNG, USB_DEVICE_ID_SAMSUNG_IR_REMOTE, HID_QUIRK_RDESC_SAMSUNG_REMOTE },
 
+	{ USB_VENDOR_ID_SUNPLUS, USB_DEVICE_ID_SUNPLUS_WDESKTOP, HID_QUIRK_RDESC_SUNPLUS_WDESKTOP },
+
 	{ USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_1, HID_QUIRK_RDESC_SWAPPED_MIN_MAX },
 	{ USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_2, HID_QUIRK_RDESC_SWAPPED_MIN_MAX },
 
···
 	}
 }
 
+static void usbhid_fixup_sunplus_wdesktop(unsigned char *rdesc, int rsize)
+{
+	if (rsize >= 107 && rdesc[104] == 0x26
+			 && rdesc[105] == 0x80
+			 && rdesc[106] == 0x03) {
+		printk(KERN_INFO "Fixing up Sunplus Wireless Desktop report descriptor\n");
+		rdesc[105] = rdesc[110] = 0x03;
+		rdesc[106] = rdesc[111] = 0x21;
+	}
+}
+
 /*
  * Samsung IrDA remote controller (reports as Cypress USB Mouse).
  *
···
 		else if (paramVendor == idVendor && paramProduct == idProduct)
 			__usbhid_fixup_report_descriptor(quirks, rdesc, rsize);
 	}
+
+	if (quirks & HID_QUIRK_RDESC_SUNPLUS_WDESKTOP)
+		usbhid_fixup_sunplus_wdesktop(rdesc, rsize);
 
 }

include/linux/hid.h

···
 #define HID_QUIRK_RDESC_BUTTON_CONSUMER		0x00000020
 #define HID_QUIRK_RDESC_SAMSUNG_REMOTE		0x00000040
 #define HID_QUIRK_RDESC_MICROSOFT_RECV_1028	0x00000080
+#define HID_QUIRK_RDESC_SUNPLUS_WDESKTOP	0x00000100
 
 /*
  * This is the global environment of the parser. This information is
···
  * This is the local environment. It is persistent up the next main-item.
  */
 
-#define HID_MAX_USAGES			8192
+#define HID_MAX_USAGES			12288
 #define HID_DEFAULT_NUM_COLLECTIONS	16
 
 struct hid_local {