Input: wacom - add support for three new ISDv4 sensors

This patch adds support for the 0x4004, 0x5000, and 0x5002 sensors found
on what should be the Motion R12, Fujitsu Q704, and Fujitsu T904. These
tablets use a new report ID (3) for their touch packets and a slightly
different HID descriptor format, but are otherwise largely identical in
protocol to the "MTTPC" tablets.

Note:
* The R12 uses its 0x4004 sensor for touch input only. A pen interface
is not present in its HID descriptor, though its possible a 0x4004
may be used for pen input by other tablet PCs in the future.

* The 0x5002 sensor appears to use a new report ID (8) for its pen
packets. The other sensors continue to use the traditional report
ID (2).

Signed-off-by: Jason Gerecke <[e-mail]>
Reviewed-by: Ping Cheng <[e-mail]>
Signed-off-by: Dmitry Torokhov <[e-mail]>

drivers/input/tablet/wacom_sys.c

···
 						break;
 
 					case MTTPC:
+					case MTTPC_B:
 						features->pktlen = WACOM_PKGLEN_MTTPC;
 						break;
 
···
 						features->unit = report[i - 1];
 						features->unitExpo = report[i - 3];
 						i += 12;
+						break;
+
+					case MTTPC_B:
+						features->x_max =
+							get_unaligned_le16(&report[i + 3]);
+						features->x_phy =
+							get_unaligned_le16(&report[i + 6]);
+						features->unit = report[i - 5];
+						features->unitExpo = report[i - 3];
+						i += 9;
 						break;
 
 					default:
···
 						features->y_max =
 							get_unaligned_le16(&report[i + 6]);
 						i += 12;
+						break;
+
+					case MTTPC_B:
+						features->y_max =
+							get_unaligned_le16(&report[i + 3]);
+						features->y_phy =
+							get_unaligned_le16(&report[i + 6]);
+						i += 9;
 						break;
 
 					default:

drivers/input/tablet/wacom_wac.c

···
 	int x_offset = 0;
 
 	/* MTTPC does not support Height and Width */
-	if (wacom->features.type == MTTPC)
+	if (wacom->features.type == MTTPC || wacom->features.type == MTTPC_B)
 		x_offset = -4;
 
 	/*
···
 	case WACOM_PKGLEN_TPC2FG:
 		return wacom_tpc_mt_touch(wacom);
 
+	case WACOM_PKGLEN_PENABLED:
+		return wacom_tpc_pen(wacom);
+
 	default:
 		switch (data[0]) {
 		case WACOM_REPORT_TPC1FG:
···
 			return wacom_tpc_single_touch(wacom, len);
 
 		case WACOM_REPORT_TPCMT:
+		case WACOM_REPORT_TPCMT2:
 			return wacom_mt_touch(wacom);
 
 		case WACOM_REPORT_PENABLED:
···
 	case TABLETPC2FG:
 	case MTSCREEN:
 	case MTTPC:
+	case MTTPC_B:
 		sync = wacom_tpc_irq(wacom_wac, len);
 		break;
 
···
 
 	case MTSCREEN:
 	case MTTPC:
+	case MTTPC_B:
 	case TABLETPC2FG:
 		if (features->device_type == BTN_TOOL_FINGER) {
 			unsigned int flags = INPUT_MT_DIRECT;
···
 static const struct wacom_features wacom_features_0x4001 =
 	{ "Wacom ISDv4 4001",      WACOM_PKGLEN_MTTPC,     26202, 16325,  255,
 	  0, MTTPC, WACOM_INTUOS_RES, WACOM_INTUOS_RES };
+static const struct wacom_features wacom_features_0x4004 =
+	{ "Wacom ISDv4 4004",      WACOM_PKGLEN_MTTPC,     11060, 6220,  255,
+	  0, MTTPC_B, WACOM_INTUOS_RES, WACOM_INTUOS_RES };
+static const struct wacom_features wacom_features_0x5000 =
+	{ "Wacom ISDv4 5000",      WACOM_PKGLEN_MTTPC,     27848, 15752,  1023,
+	  0, MTTPC_B, WACOM_INTUOS_RES, WACOM_INTUOS_RES };
+static const struct wacom_features wacom_features_0x5002 =
+	{ "Wacom ISDv4 5002",      WACOM_PKGLEN_MTTPC,     29576, 16724,  1023,
+	  0, MTTPC_B, WACOM_INTUOS_RES, WACOM_INTUOS_RES };
 static const struct wacom_features wacom_features_0x47 =
 	{ "Wacom Intuos2 6x8",    WACOM_PKGLEN_INTUOS,    20320, 16240, 1023,
 	  31, INTUOS, WACOM_INTUOS_RES, WACOM_INTUOS_RES };
···
 	{ USB_DEVICE_DETAILED(0x315, USB_CLASS_HID, 0, 0) },
 	{ USB_DEVICE_DETAILED(0x317, USB_CLASS_HID, 0, 0) },
 	{ USB_DEVICE_WACOM(0x4001) },
+	{ USB_DEVICE_WACOM(0x4004) },
+	{ USB_DEVICE_WACOM(0x5000) },
+	{ USB_DEVICE_WACOM(0x5002) },
 	{ USB_DEVICE_WACOM(0x47) },
 	{ USB_DEVICE_WACOM(0xF4) },
 	{ USB_DEVICE_WACOM(0xF8) },

drivers/input/tablet/wacom_wac.h

···
 #define WACOM_PKGLEN_MTOUCH	62
 #define WACOM_PKGLEN_MTTPC	40
 #define WACOM_PKGLEN_DTUS	68
+#define WACOM_PKGLEN_PENABLED	 8
 
 /* wacom data size per MT contact */
 #define WACOM_BYTES_PER_MT_PACKET	11
···
 #define WACOM_REPORT_TPC1FG		6
 #define WACOM_REPORT_TPC2FG		13
 #define WACOM_REPORT_TPCMT		13
+#define WACOM_REPORT_TPCMT2		3
 #define WACOM_REPORT_TPCHID		15
 #define WACOM_REPORT_TPCST		16
 #define WACOM_REPORT_DTUS		17
···
 	TABLETPC2FG,
 	MTSCREEN,
 	MTTPC,
+	MTTPC_B,
 	MAX_TYPE
 };