Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 2283 insertions, 0 deletions

diff --git a/drivers/usb/input/aiptek.c b/drivers/usb/input/aiptek.c
new file mode 100644
index 00000000000..d7fea9ea301
--- /dev/null
+++ b/drivers/usb/input/aiptek.c
@@ -0,0 +1,2283 @@
+/*
+ *  Native support for the Aiptek HyperPen USB Tablets
+ *  (4000U/5000U/6000U/8000U/12000U)
+ *  
+ *  Copyright (c) 2001      Chris Atenasio   <chris@crud.net>
+ *  Copyright (c) 2002-2004 Bryan W. Headley <bwheadley@earthlink.net>
+ *
+ *  based on wacom.c by
+ *     Vojtech Pavlik      <vojtech@suse.cz>
+ *     Andreas Bach Aaen   <abach@stofanet.dk>
+ *     Clifford Wolf       <clifford@clifford.at>
+ *     Sam Mosel           <sam.mosel@computer.org>
+ *     James E. Blair      <corvus@gnu.org>
+ *     Daniel Egger        <egger@suse.de>
+ *
+ *  Many thanks to Oliver Kuechemann for his support.
+ *
+ *  ChangeLog:
+ *      v0.1 - Initial release
+ *      v0.2 - Hack to get around fake event 28's. (Bryan W. Headley)
+ *      v0.3 - Make URB dynamic (Bryan W. Headley, Jun-8-2002)
+ *             Released to Linux 2.4.19 and 2.5.x
+ *      v0.4 - Rewrote substantial portions of the code to deal with
+ *             corrected control sequences, timing, dynamic configuration,
+ *             support of 6000U - 12000U, procfs, and macro key support
+ *             (Jan-1-2003 - Feb-5-2003, Bryan W. Headley)
+ *      v1.0 - Added support for diagnostic messages, count of messages
+ *             received from URB - Mar-8-2003, Bryan W. Headley
+ *      v1.1 - added support for tablet resolution, changed DV and proximity
+ *             some corrections - Jun-22-2003, martin schneebacher
+ *           - Added support for the sysfs interface, deprecating the
+ *             procfs interface for 2.5.x kernel. Also added support for
+ *             Wheel command. Bryan W. Headley July-15-2003.
+ *      v1.2 - Reworked jitter timer as a kernel thread. 
+ *             Bryan W. Headley November-28-2003/Jan-10-2004.
+ *      v1.3 - Repaired issue of kernel thread going nuts on single-processor
+ *             machines, introduced programmableDelay as a command line
+ *             parameter. Feb 7 2004, Bryan W. Headley.
+ *      v1.4 - Re-wire jitter so it does not require a thread. Courtesy of
+ *             Rene van Paassen. Added reporting of physical pointer device
+ *             (e.g., stylus, mouse in reports 2, 3, 4, 5. We don't know
+ *             for reports 1, 6.)
+ *             what physical device reports for reports 1, 6.) Also enabled
+ *             MOUSE and LENS tool button modes. Renamed "rubber" to "eraser".
+ *             Feb 20, 2004, Bryan W. Headley.
+ *      v1.5 - Added previousJitterable, so we don't do jitter delay when the
+ *             user is holding a button down for periods of time.
+ *
+ * NOTE:
+ *      This kernel driver is augmented by the "Aiptek" XFree86 input
+ *      driver for your X server, as well as the Gaiptek GUI Front-end
+ *      "Tablet Manager". 
+ *      These three products are highly interactive with one another, 
+ *      so therefore it's easier to document them all as one subsystem.
+ *      Please visit the project's "home page", located at, 
+ *      http://aiptektablet.sourceforge.net.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/jiffies.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/input.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/usb.h>
+#include <linux/sched.h>
+#include <asm/uaccess.h>
+#include <asm/unaligned.h>
+
+/*
+ * Version Information
+ */
+#define DRIVER_VERSION "v1.5 (May-15-2004)"
+#define DRIVER_AUTHOR  "Bryan W. Headley/Chris Atenasio"
+#define DRIVER_DESC    "Aiptek HyperPen USB Tablet Driver (Linux 2.6.x)"
+
+/*
+ * Aiptek status packet:
+ *
+ * (returned as Report 1 - relative coordinates from mouse and stylus)
+ *
+ *        bit7  bit6  bit5  bit4  bit3  bit2  bit1  bit0
+ * byte0   0     0     0     0     0     0     0     1
+ * byte1   0     0     0     0     0    BS2   BS    Tip
+ * byte2  X7    X6    X5    X4    X3    X2    X1    X0
+ * byte3  Y7    Y6    Y5    Y4    Y3    Y2    Y1    Y0
+ *
+ * (returned as Report 2 - absolute coordinates from the stylus)
+ *
+ *        bit7  bit6  bit5  bit4  bit3  bit2  bit1  bit0
+ * byte0   0     0     0     0     0     0     1     0
+ * byte1  X7    X6    X5    X4    X3    X2    X1    X0
+ * byte2  X15   X14   X13   X12   X11   X10   X9    X8
+ * byte3  Y7    Y6    Y5    Y4    Y3    Y2    Y1    Y0
+ * byte4  Y15   Y14   Y13   Y12   Y11   Y10   Y9    Y8
+ * byte5   *     *     *    BS2   BS1   Tip   IR    DV
+ * byte6  P7    P6    P5    P4    P3    P2    P1    P0
+ * byte7  P15   P14   P13   P12   P11   P10   P9    P8
+ *
+ * (returned as Report 3 - absolute coordinates from the mouse)
+ *
+ *        bit7  bit6  bit5  bit4  bit3  bit2  bit1  bit0
+ * byte0   0     0     0     0     0     0     1     0
+ * byte1  X7    X6    X5    X4    X3    X2    X1    X0
+ * byte2  X15   X14   X13   X12   X11   X10   X9    X8
+ * byte3  Y7    Y6    Y5    Y4    Y3    Y2    Y1    Y0
+ * byte4  Y15   Y14   Y13   Y12   Y11   Y10   Y9    Y8
+ * byte5   *     *     *    BS2   BS1   Tip   IR    DV
+ * byte6  P7    P6    P5    P4    P3    P2    P1    P0
+ * byte7  P15   P14   P13   P12   P11   P10   P9    P8
+ *
+ * (returned as Report 4 - macrokeys from the stylus)
+ *
+ *        bit7  bit6  bit5  bit4  bit3  bit2  bit1  bit0
+ * byte0   0     0     0     0     0     1     0     0
+ * byte1   0     0     0    BS2   BS    Tip   IR    DV
+ * byte2   0     0     0     0     0     0     1     0
+ * byte3   0     0     0    K4    K3    K2    K1    K0
+ * byte4  P7    P6    P5    P4    P3    P2    P1    P0
+ * byte5  P15   P14   P13   P12   P11   P10   P9    P8
+ *
+ * (returned as Report 5 - macrokeys from the mouse)
+ *
+ *        bit7  bit6  bit5  bit4  bit3  bit2  bit1  bit0
+ * byte0   0     0     0     0     0     1     0     0
+ * byte1   0     0     0    BS2   BS    Tip   IR    DV
+ * byte2   0     0     0     0     0     0     1     0
+ * byte3   0     0     0    K4    K3    K2    K1    K0
+ * byte4  P7    P6    P5    P4    P3    P2    P1    P0
+ * byte5  P15   P14   P13   P12   P11   P10   P9    P8
+ *
+ * IR: In Range = Proximity on
+ * DV = Data Valid
+ * BS = Barrel Switch (as in, macro keys)
+ * BS2 also referred to as Tablet Pick
+ *
+ * Command Summary:
+ *
+ * Use report_type CONTROL (3)
+ * Use report_id   2
+ *
+ * Command/Data    Description     Return Bytes    Return Value
+ * 0x10/0x00       SwitchToMouse       0
+ * 0x10/0x01       SwitchToTablet      0
+ * 0x18/0x04       SetResolution       0 
+ * 0x12/0xFF       AutoGainOn          0
+ * 0x17/0x00       FilterOn            0
+ * 0x01/0x00       GetXExtension       2           MaxX
+ * 0x01/0x01       GetYExtension       2           MaxY
+ * 0x02/0x00       GetModelCode        2           ModelCode = LOBYTE
+ * 0x03/0x00       GetODMCode          2           ODMCode
+ * 0x08/0x00       GetPressureLevels   2           =512
+ * 0x04/0x00       GetFirmwareVersion  2           Firmware Version
+ * 0x11/0x02       EnableMacroKeys     0
+ *
+ * To initialize the tablet:
+ *
+ * (1) Send Resolution500LPI (Command)
+ * (2) Query for Model code (Option Report)
+ * (3) Query for ODM code (Option Report)
+ * (4) Query for firmware (Option Report)
+ * (5) Query for GetXExtension (Option Report)
+ * (6) Query for GetYExtension (Option Report)
+ * (7) Query for GetPressureLevels (Option Report)
+ * (8) SwitchToTablet for Absolute coordinates, or
+ *     SwitchToMouse for Relative coordinates (Command)
+ * (9) EnableMacroKeys (Command)
+ * (10) FilterOn (Command)
+ * (11) AutoGainOn (Command)
+ *
+ * (Step 9 can be omitted, but you'll then have no function keys.)
+ */
+
+#define USB_VENDOR_ID_AIPTEK				0x08ca
+#define USB_REQ_GET_REPORT				0x01
+#define USB_REQ_SET_REPORT				0x09
+
+	/* PointerMode codes
+	 */
+#define AIPTEK_POINTER_ONLY_MOUSE_MODE			0
+#define AIPTEK_POINTER_ONLY_STYLUS_MODE			1
+#define AIPTEK_POINTER_EITHER_MODE			2
+
+#define AIPTEK_POINTER_ALLOW_MOUSE_MODE(a)		\
+	(a == AIPTEK_POINTER_ONLY_MOUSE_MODE ||		\
+	 a == AIPTEK_POINTER_EITHER_MODE)
+#define AIPTEK_POINTER_ALLOW_STYLUS_MODE(a)		\
+	(a == AIPTEK_POINTER_ONLY_STYLUS_MODE ||	\
+	 a == AIPTEK_POINTER_EITHER_MODE)
+
+	/* CoordinateMode code
+	 */
+#define AIPTEK_COORDINATE_RELATIVE_MODE			0
+#define AIPTEK_COORDINATE_ABSOLUTE_MODE			1
+
+       /* XTilt and YTilt values
+        */
+#define AIPTEK_TILT_MIN					(-128)
+#define AIPTEK_TILT_MAX					127
+#define AIPTEK_TILT_DISABLE				(-10101)
+
+	/* Wheel values
+	 */
+#define AIPTEK_WHEEL_MIN				0
+#define AIPTEK_WHEEL_MAX				1024
+#define AIPTEK_WHEEL_DISABLE				(-10101)
+
+	/* ToolCode values, which BTW are 0x140 .. 0x14f
+	 * We have things set up such that if TOOL_BUTTON_FIRED_BIT is
+	 * not set, we'll send one instance of AIPTEK_TOOL_BUTTON_xxx.
+	 *
+	 * Whenever the user resets the value, TOOL_BUTTON_FIRED_BIT will
+	 * get reset.
+	 */
+#define TOOL_BUTTON(x)					((x) & 0x14f)
+#define TOOL_BUTTON_FIRED(x)				((x) & 0x200)
+#define TOOL_BUTTON_FIRED_BIT				0x200
+	/* toolMode codes
+	 */
+#define AIPTEK_TOOL_BUTTON_PEN_MODE			BTN_TOOL_PEN
+#define AIPTEK_TOOL_BUTTON_PEN_MODE			BTN_TOOL_PEN
+#define AIPTEK_TOOL_BUTTON_PENCIL_MODE			BTN_TOOL_PENCIL
+#define AIPTEK_TOOL_BUTTON_BRUSH_MODE			BTN_TOOL_BRUSH
+#define AIPTEK_TOOL_BUTTON_AIRBRUSH_MODE		BTN_TOOL_AIRBRUSH
+#define AIPTEK_TOOL_BUTTON_ERASER_MODE			BTN_TOOL_RUBBER
+#define AIPTEK_TOOL_BUTTON_MOUSE_MODE			BTN_TOOL_MOUSE
+#define AIPTEK_TOOL_BUTTON_LENS_MODE			BTN_TOOL_LENS
+
+	/* Diagnostic message codes
+	 */
+#define AIPTEK_DIAGNOSTIC_NA				0
+#define AIPTEK_DIAGNOSTIC_SENDING_RELATIVE_IN_ABSOLUTE	1
+#define AIPTEK_DIAGNOSTIC_SENDING_ABSOLUTE_IN_RELATIVE	2
+#define AIPTEK_DIAGNOSTIC_TOOL_DISALLOWED		3
+
+	/* Time to wait (in ms) to help mask hand jittering 
+	 * when pressing the stylus buttons.
+	 */
+#define AIPTEK_JITTER_DELAY_DEFAULT			50
+
+	/* Time to wait (in ms) in-between sending the tablet
+	 * a command and beginning the process of reading the return
+	 * sequence from the tablet.
+	 */
+#define AIPTEK_PROGRAMMABLE_DELAY_25		25
+#define AIPTEK_PROGRAMMABLE_DELAY_50		50
+#define AIPTEK_PROGRAMMABLE_DELAY_100		100
+#define AIPTEK_PROGRAMMABLE_DELAY_200		200
+#define AIPTEK_PROGRAMMABLE_DELAY_300		300
+#define AIPTEK_PROGRAMMABLE_DELAY_400		400
+#define AIPTEK_PROGRAMMABLE_DELAY_DEFAULT	AIPTEK_PROGRAMMABLE_DELAY_400
+
+	/* Mouse button programming
+	 */
+#define AIPTEK_MOUSE_LEFT_BUTTON		0x01
+#define AIPTEK_MOUSE_RIGHT_BUTTON		0x02
+#define AIPTEK_MOUSE_MIDDLE_BUTTON		0x04
+
+	/* Stylus button programming
+	 */
+#define AIPTEK_STYLUS_LOWER_BUTTON		0x08
+#define AIPTEK_STYLUS_UPPER_BUTTON		0x10
+
+	/* Length of incoming packet from the tablet
+	 */
+#define AIPTEK_PACKET_LENGTH			8
+
+	/* We report in EV_MISC both the proximity and
+	 * whether the report came from the stylus, tablet mouse
+	 * or "unknown" -- Unknown when the tablet is in relative
+	 * mode, because we only get report 1's.
+	 */
+#define AIPTEK_REPORT_TOOL_UNKNOWN		0x10
+#define AIPTEK_REPORT_TOOL_STYLUS		0x20
+#define AIPTEK_REPORT_TOOL_MOUSE		0x40
+
+static int programmableDelay = AIPTEK_PROGRAMMABLE_DELAY_DEFAULT;
+static int jitterDelay = AIPTEK_JITTER_DELAY_DEFAULT;
+
+struct aiptek_features {
+	int odmCode;		/* Tablet manufacturer code       */
+	int modelCode;		/* Tablet model code (not unique) */
+	int firmwareCode;	/* prom/eeprom version            */
+	char usbPath[64 + 1];	/* device's physical usb path     */
+	char inputPath[64 + 1];	/* input device path              */
+};
+
+struct aiptek_settings {
+	int pointerMode;	/* stylus-, mouse-only or either */
+	int coordinateMode;	/* absolute/relative coords      */
+	int toolMode;		/* pen, pencil, brush, etc. tool */
+	int xTilt;		/* synthetic xTilt amount        */
+	int yTilt;		/* synthetic yTilt amount        */
+	int wheel;		/* synthetic wheel amount        */
+	int stylusButtonUpper;	/* stylus upper btn delivers...  */
+	int stylusButtonLower;	/* stylus lower btn delivers...  */
+	int mouseButtonLeft;	/* mouse left btn delivers...    */
+	int mouseButtonMiddle;	/* mouse middle btn delivers...  */
+	int mouseButtonRight;	/* mouse right btn delivers...   */
+	int programmableDelay;	/* delay for tablet programming  */
+	int jitterDelay;	/* delay for hand jittering      */
+};
+
+struct aiptek {
+	struct input_dev inputdev;		/* input device struct           */
+	struct usb_device *usbdev;		/* usb device struct             */
+	struct urb *urb;			/* urb for incoming reports      */
+	dma_addr_t data_dma;			/* our dma stuffage              */
+	struct aiptek_features features;	/* tablet's array of features    */
+	struct aiptek_settings curSetting;	/* tablet's current programmable */
+	struct aiptek_settings newSetting;	/* ... and new param settings    */
+	unsigned int ifnum;			/* interface number for IO       */
+	int openCount;				/* module use counter            */
+	int diagnostic;				/* tablet diagnostic codes       */
+	unsigned long eventCount;		/* event count                   */
+	int inDelay;				/* jitter: in jitter delay?      */
+	unsigned long endDelay;			/* jitter: time when delay ends  */
+	int previousJitterable;			/* jitterable prev value     */
+	unsigned char *data;			/* incoming packet data          */
+};
+
+/*
+ * Permit easy lookup of keyboard events to send, versus
+ * the bitmap which comes from the tablet. This hides the
+ * issue that the F_keys are not sequentially numbered.
+ */
+static int macroKeyEvents[] = {
+	KEY_ESC, KEY_F1, KEY_F2, KEY_F3, KEY_F4, KEY_F5,
+	KEY_F6, KEY_F7, KEY_F8, KEY_F9, KEY_F10, KEY_F11,
+	KEY_F12, KEY_F13, KEY_F14, KEY_F15, KEY_F16, KEY_F17,
+	KEY_F18, KEY_F19, KEY_F20, KEY_F21, KEY_F22, KEY_F23,
+	KEY_F24, KEY_STOP, KEY_AGAIN, KEY_PROPS, KEY_UNDO,
+	KEY_FRONT, KEY_COPY, KEY_OPEN, KEY_PASTE, 0
+};
+
+/***********************************************************************
+ * Relative reports deliver values in 2's complement format to
+ * deal with negative offsets.
+ */
+static int aiptek_convert_from_2s_complement(unsigned char c)
+{
+	int ret;
+	unsigned char b = c;
+	int negate = 0;
+
+	if ((b & 0x80) != 0) {
+		b = ~b;
+		b--;
+		negate = 1;
+	}
+	ret = b;
+	ret = (negate == 1) ? -ret : ret;
+	return ret;
+}
+
+/***********************************************************************
+ * aiptek_irq can receive one of six potential reports.
+ * The documentation for each is in the body of the function.
+ *
+ * The tablet reports on several attributes per invocation of
+ * aiptek_irq. Because the Linux Input Event system allows the
+ * transmission of ONE attribute per input_report_xxx() call,
+ * collation has to be done on the other end to reconstitute
+ * a complete tablet report. Further, the number of Input Event reports
+ * submitted varies, depending on what USB report type, and circumstance.
+ * To deal with this, EV_MSC is used to indicate an 'end-of-report'
+ * message. This has been an undocumented convention understood by the kernel
+ * tablet driver and clients such as gpm and XFree86's tablet drivers.
+ *
+ * Of the information received from the tablet, the one piece I
+ * cannot transmit is the proximity bit (without resorting to an EV_MSC
+ * convention above.) I therefore have taken over REL_MISC and ABS_MISC
+ * (for relative and absolute reports, respectively) for communicating
+ * Proximity. Why two events? I thought it interesting to know if the
+ * Proximity event occured while the tablet was in absolute or relative
+ * mode.
+ *
+ * Other tablets use the notion of a certain minimum stylus pressure
+ * to infer proximity. While that could have been done, that is yet
+ * another 'by convention' behavior, the documentation for which
+ * would be spread between two (or more) pieces of software.
+ *
+ * EV_MSC usage was terminated for this purpose in Linux 2.5.x, and
+ * replaced with the input_sync() method (which emits EV_SYN.)
+ */
+
+static void aiptek_irq(struct urb *urb, struct pt_regs *regs)
+{
+	struct aiptek *aiptek = urb->context;
+	unsigned char *data = aiptek->data;
+	struct input_dev *inputdev = &aiptek->inputdev;
+	int jitterable = 0;
+	int retval, macro, x, y, z, left, right, middle, p, dv, tip, bs, pck;
+
+	switch (urb->status) {
+	case 0:
+		/* Success */
+		break;
+
+	case -ECONNRESET:
+	case -ENOENT:
+	case -ESHUTDOWN:
+		/* This urb is terminated, clean up */
+		dbg("%s - urb shutting down with status: %d",
+		    __FUNCTION__, urb->status);
+		return;
+
+	default:
+		dbg("%s - nonzero urb status received: %d",
+		    __FUNCTION__, urb->status);
+		goto exit;
+	}
+
+	/* See if we are in a delay loop -- throw out report if true.
+	 */
+	if (aiptek->inDelay == 1 && time_after(aiptek->endDelay, jiffies)) {
+		goto exit;
+	}
+
+	aiptek->inDelay = 0;
+	aiptek->eventCount++;
+
+	/* Report 1 delivers relative coordinates with either a stylus
+	 * or the mouse. You do not know, however, which input
+	 * tool generated the event.
+	 */
+	if (data[0] == 1) {
+		if (aiptek->curSetting.coordinateMode ==
+		    AIPTEK_COORDINATE_ABSOLUTE_MODE) {
+			aiptek->diagnostic =
+			    AIPTEK_DIAGNOSTIC_SENDING_RELATIVE_IN_ABSOLUTE;
+		} else {
+			input_regs(inputdev, regs);
+
+			x = aiptek_convert_from_2s_complement(data[2]);
+			y = aiptek_convert_from_2s_complement(data[3]);
+
+			/* jitterable keeps track of whether any button has been pressed.
+			 * We're also using it to remap the physical mouse button mask
+			 * to pseudo-settings. (We don't specifically care about it's
+			 * value after moving/transposing mouse button bitmasks, except
+			 * that a non-zero value indicates that one or more
+			 * mouse button was pressed.)
+			 */
+			jitterable = data[5] & 0x07;
+
+			left = (data[5] & aiptek->curSetting.mouseButtonLeft) != 0 ? 1 : 0;
+			right = (data[5] & aiptek->curSetting.mouseButtonRight) != 0 ? 1 : 0;
+			middle = (data[5] & aiptek->curSetting.mouseButtonMiddle) != 0 ? 1 : 0;
+
+			input_report_key(inputdev, BTN_LEFT, left);
+			input_report_key(inputdev, BTN_MIDDLE, middle);
+			input_report_key(inputdev, BTN_RIGHT, right);
+			input_report_rel(inputdev, REL_X, x);
+			input_report_rel(inputdev, REL_Y, y);
+			input_report_rel(inputdev, REL_MISC, 1 | AIPTEK_REPORT_TOOL_UNKNOWN);
+
+			/* Wheel support is in the form of a single-event
+			 * firing.
+			 */
+			if (aiptek->curSetting.wheel != AIPTEK_WHEEL_DISABLE) {
+				input_report_rel(inputdev, REL_WHEEL,
+						 aiptek->curSetting.wheel);
+				aiptek->curSetting.wheel = AIPTEK_WHEEL_DISABLE;
+			}
+			input_sync(inputdev);
+		}
+	}
+	/* Report 2 is delivered only by the stylus, and delivers
+	 * absolute coordinates.
+	 */
+	else if (data[0] == 2) {
+		if (aiptek->curSetting.coordinateMode == AIPTEK_COORDINATE_RELATIVE_MODE) {
+			aiptek->diagnostic = AIPTEK_DIAGNOSTIC_SENDING_ABSOLUTE_IN_RELATIVE;
+		} else if (!AIPTEK_POINTER_ALLOW_STYLUS_MODE
+			    (aiptek->curSetting.pointerMode)) {
+				aiptek->diagnostic = AIPTEK_DIAGNOSTIC_TOOL_DISALLOWED;
+		} else {
+			input_regs(inputdev, regs);
+
+			x = le16_to_cpu(get_unaligned((__le16 *) (data + 1)));
+			y = le16_to_cpu(get_unaligned((__le16 *) (data + 3)));
+			z = le16_to_cpu(get_unaligned((__le16 *) (data + 6)));
+
+			p = (data[5] & 0x01) != 0 ? 1 : 0;
+			dv = (data[5] & 0x02) != 0 ? 1 : 0;
+			tip = (data[5] & 0x04) != 0 ? 1 : 0;
+
+			/* Use jitterable to re-arrange button masks
+			 */
+			jitterable = data[5] & 0x18;
+
+			bs = (data[5] & aiptek->curSetting.stylusButtonLower) != 0 ? 1 : 0;
+			pck = (data[5] & aiptek->curSetting.stylusButtonUpper) != 0 ? 1 : 0;
+
+			/* dv indicates 'data valid' (e.g., the tablet is in sync
+			 * and has delivered a "correct" report) We will ignore
+			 * all 'bad' reports...
+			 */
+			if (dv != 0) {
+				/* If we've not already sent a tool_button_?? code, do
+				 * so now. Then set FIRED_BIT so it won't be resent unless
+				 * the user forces FIRED_BIT off.
+				 */
+				if (TOOL_BUTTON_FIRED
+				    (aiptek->curSetting.toolMode) == 0) {
+					input_report_key(inputdev,
+							 TOOL_BUTTON(aiptek->curSetting.toolMode),
+							 1);
+					aiptek->curSetting.toolMode |= TOOL_BUTTON_FIRED_BIT;
+				}
+
+				if (p != 0) {
+					input_report_abs(inputdev, ABS_X, x);
+					input_report_abs(inputdev, ABS_Y, y);
+					input_report_abs(inputdev, ABS_PRESSURE, z);
+
+					input_report_key(inputdev, BTN_TOUCH, tip);
+					input_report_key(inputdev, BTN_STYLUS, bs);
+					input_report_key(inputdev, BTN_STYLUS2, pck);
+
+					if (aiptek->curSetting.xTilt !=
+					    AIPTEK_TILT_DISABLE) {
+						input_report_abs(inputdev,
+								 ABS_TILT_X,
+								 aiptek->curSetting.xTilt);
+					}
+					if (aiptek->curSetting.yTilt != AIPTEK_TILT_DISABLE) {
+						input_report_abs(inputdev,
+								 ABS_TILT_Y,
+								 aiptek->curSetting.yTilt);
+					}
+
+					/* Wheel support is in the form of a single-event
+					 * firing.
+					 */
+					if (aiptek->curSetting.wheel !=
+					    AIPTEK_WHEEL_DISABLE) {
+						input_report_abs(inputdev,
+								 ABS_WHEEL,
+								 aiptek->curSetting.wheel);
+						aiptek->curSetting.wheel = AIPTEK_WHEEL_DISABLE;
+					}
+				}
+				input_report_abs(inputdev, ABS_MISC, p | AIPTEK_REPORT_TOOL_STYLUS);
+				input_sync(inputdev);
+			}
+		}
+	}
+	/* Report 3's come from the mouse in absolute mode.
+	 */
+	else if (data[0] == 3) {
+		if (aiptek->curSetting.coordinateMode == AIPTEK_COORDINATE_RELATIVE_MODE) {
+			aiptek->diagnostic = AIPTEK_DIAGNOSTIC_SENDING_ABSOLUTE_IN_RELATIVE;
+		} else if (!AIPTEK_POINTER_ALLOW_MOUSE_MODE
+			(aiptek->curSetting.pointerMode)) {
+			aiptek->diagnostic = AIPTEK_DIAGNOSTIC_TOOL_DISALLOWED;
+		} else {
+			input_regs(inputdev, regs);
+			x = le16_to_cpu(get_unaligned((__le16 *) (data + 1)));
+			y = le16_to_cpu(get_unaligned((__le16 *) (data + 3)));
+
+			jitterable = data[5] & 0x1c;
+
+			p = (data[5] & 0x01) != 0 ? 1 : 0;
+			dv = (data[5] & 0x02) != 0 ? 1 : 0;
+			left = (data[5] & aiptek->curSetting.mouseButtonLeft) != 0 ? 1 : 0;
+			right = (data[5] & aiptek->curSetting.mouseButtonRight) != 0 ? 1 : 0;
+			middle = (data[5] & aiptek->curSetting.mouseButtonMiddle) != 0 ? 1 : 0;
+
+			if (dv != 0) {
+				/* If we've not already sent a tool_button_?? code, do
+				 * so now. Then set FIRED_BIT so it won't be resent unless
+				 * the user forces FIRED_BIT off.
+				 */
+				if (TOOL_BUTTON_FIRED
+				    (aiptek->curSetting.toolMode) == 0) {
+					input_report_key(inputdev,
+							 TOOL_BUTTON(aiptek->curSetting.toolMode),
+							 1);
+					aiptek->curSetting.toolMode |= TOOL_BUTTON_FIRED_BIT;
+				}
+
+				if (p != 0) {
+					input_report_abs(inputdev, ABS_X, x);
+					input_report_abs(inputdev, ABS_Y, y);
+
+					input_report_key(inputdev, BTN_LEFT, left);
+					input_report_key(inputdev, BTN_MIDDLE, middle);
+					input_report_key(inputdev, BTN_RIGHT, right);
+
+					/* Wheel support is in the form of a single-event
+					 * firing.
+					 */
+					if (aiptek->curSetting.wheel != AIPTEK_WHEEL_DISABLE) {
+						input_report_abs(inputdev,
+								 ABS_WHEEL,
+								 aiptek->curSetting.wheel);
+						aiptek->curSetting.wheel = AIPTEK_WHEEL_DISABLE;
+					}
+				}
+				input_report_rel(inputdev, REL_MISC, p | AIPTEK_REPORT_TOOL_MOUSE);
+				input_sync(inputdev);
+			}
+		}
+	}
+	/* Report 4s come from the macro keys when pressed by stylus
+	 */
+	else if (data[0] == 4) {
+		jitterable = data[1] & 0x18;
+
+		p = (data[1] & 0x01) != 0 ? 1 : 0;
+		dv = (data[1] & 0x02) != 0 ? 1 : 0;
+		tip = (data[1] & 0x04) != 0 ? 1 : 0;
+		bs = (data[1] & aiptek->curSetting.stylusButtonLower) != 0 ? 1 : 0;
+		pck = (data[1] & aiptek->curSetting.stylusButtonUpper) != 0 ? 1 : 0;
+
+		macro = data[3];
+		z = le16_to_cpu(get_unaligned((__le16 *) (data + 4)));
+
+		if (dv != 0) {
+			input_regs(inputdev, regs);
+
+			/* If we've not already sent a tool_button_?? code, do
+			 * so now. Then set FIRED_BIT so it won't be resent unless
+			 * the user forces FIRED_BIT off.
+			 */
+			if (TOOL_BUTTON_FIRED(aiptek->curSetting.toolMode) == 0) {
+				input_report_key(inputdev,
+						 TOOL_BUTTON(aiptek->curSetting.toolMode),
+						 1);
+				aiptek->curSetting.toolMode |= TOOL_BUTTON_FIRED_BIT;
+			}
+
+			if (p != 0) {
+				input_report_key(inputdev, BTN_TOUCH, tip);
+				input_report_key(inputdev, BTN_STYLUS, bs);
+				input_report_key(inputdev, BTN_STYLUS2, pck);
+				input_report_abs(inputdev, ABS_PRESSURE, z);
+			}
+
+			/* For safety, we're sending key 'break' codes for the
+			 * neighboring macro keys.
+			 */
+			if (macro > 0) {
+				input_report_key(inputdev,
+						 macroKeyEvents[macro - 1], 0);
+			}
+			if (macro < 25) {
+				input_report_key(inputdev,
+						 macroKeyEvents[macro + 1], 0);
+			}
+			input_report_key(inputdev, macroKeyEvents[macro], p);
+			input_report_abs(inputdev, ABS_MISC,
+					 p | AIPTEK_REPORT_TOOL_STYLUS);
+			input_sync(inputdev);
+		}
+	}
+	/* Report 5s come from the macro keys when pressed by mouse
+	 */
+	else if (data[0] == 5) {
+		jitterable = data[1] & 0x1c;
+
+		p = (data[1] & 0x01) != 0 ? 1 : 0;
+		dv = (data[1] & 0x02) != 0 ? 1 : 0;
+		left = (data[1]& aiptek->curSetting.mouseButtonLeft) != 0 ? 1 : 0;
+		right = (data[1] & aiptek->curSetting.mouseButtonRight) != 0 ? 1 : 0;
+		middle = (data[1] & aiptek->curSetting.mouseButtonMiddle) != 0 ? 1 : 0;
+		macro = data[3];
+
+		if (dv != 0) {
+			input_regs(inputdev, regs);
+
+			/* If we've not already sent a tool_button_?? code, do
+			 * so now. Then set FIRED_BIT so it won't be resent unless
+			 * the user forces FIRED_BIT off.
+			 */
+			if (TOOL_BUTTON_FIRED(aiptek->curSetting.toolMode) == 0) {
+				input_report_key(inputdev,
+						 TOOL_BUTTON(aiptek->curSetting.toolMode),
+						 1);
+				aiptek->curSetting.toolMode |= TOOL_BUTTON_FIRED_BIT;
+			}
+
+			if (p != 0) {
+				input_report_key(inputdev, BTN_LEFT, left);
+				input_report_key(inputdev, BTN_MIDDLE, middle);
+				input_report_key(inputdev, BTN_RIGHT, right);
+			}
+
+			/* For safety, we're sending key 'break' codes for the
+			 * neighboring macro keys.
+			 */
+			if (macro > 0) {
+				input_report_key(inputdev,
+						 macroKeyEvents[macro - 1], 0);
+			}
+			if (macro < 25) {
+				input_report_key(inputdev,
+						 macroKeyEvents[macro + 1], 0);
+			}
+
+			input_report_key(inputdev, macroKeyEvents[macro], 1);
+			input_report_rel(inputdev, ABS_MISC,
+					 p | AIPTEK_REPORT_TOOL_MOUSE);
+			input_sync(inputdev);
+		}
+	}
+	/* We have no idea which tool can generate a report 6. Theoretically,
+	 * neither need to, having been given reports 4 & 5 for such use.
+	 * However, report 6 is the 'official-looking' report for macroKeys;
+	 * reports 4 & 5 supposively are used to support unnamed, unknown
+	 * hat switches (which just so happen to be the macroKeys.)
+	 */
+	else if (data[0] == 6) {
+		macro = le16_to_cpu(get_unaligned((__le16 *) (data + 1)));
+		input_regs(inputdev, regs);
+
+		if (macro > 0) {
+			input_report_key(inputdev, macroKeyEvents[macro - 1],
+					 0);
+		}
+		if (macro < 25) {
+			input_report_key(inputdev, macroKeyEvents[macro + 1],
+					 0);
+		}
+
+		/* If we've not already sent a tool_button_?? code, do
+		 * so now. Then set FIRED_BIT so it won't be resent unless
+		 * the user forces FIRED_BIT off.
+		 */
+		if (TOOL_BUTTON_FIRED(aiptek->curSetting.toolMode) == 0) {
+			input_report_key(inputdev,
+					 TOOL_BUTTON(aiptek->curSetting.
+						     toolMode), 1);
+			aiptek->curSetting.toolMode |= TOOL_BUTTON_FIRED_BIT;
+		}
+
+		input_report_key(inputdev, macroKeyEvents[macro], 1);
+		input_report_abs(inputdev, ABS_MISC,
+				 1 | AIPTEK_REPORT_TOOL_UNKNOWN);
+		input_sync(inputdev);
+	} else {
+		dbg("Unknown report %d", data[0]);
+	}
+
+	/* Jitter may occur when the user presses a button on the stlyus
+	 * or the mouse. What we do to prevent that is wait 'x' milliseconds
+	 * following a 'jitterable' event, which should give the hand some time
+	 * stabilize itself.
+	 *
+	 * We just introduced aiptek->previousJitterable to carry forth the
+	 * notion that jitter occurs when the button state changes from on to off:
+	 * a person drawing, holding a button down is not subject to jittering.
+	 * With that in mind, changing from upper button depressed to lower button
+	 * WILL transition through a jitter delay.
+	 */
+
+	if (aiptek->previousJitterable != jitterable &&
+	    aiptek->curSetting.jitterDelay != 0 && aiptek->inDelay != 1) {
+		aiptek->endDelay = jiffies +
+		    ((aiptek->curSetting.jitterDelay * HZ) / 1000);
+		aiptek->inDelay = 1;
+	}
+	aiptek->previousJitterable = jitterable;
+
+exit:
+	retval = usb_submit_urb(urb, GFP_ATOMIC);
+	if (retval != 0) {
+		err("%s - usb_submit_urb failed with result %d",
+		    __FUNCTION__, retval);
+	}
+}
+
+/***********************************************************************
+ * These are the USB id's known so far. We do not identify them to
+ * specific Aiptek model numbers, because there has been overlaps,
+ * use, and reuse of id's in existing models. Certain models have
+ * been known to use more than one ID, indicative perhaps of
+ * manufacturing revisions. In any event, we consider these 
+ * IDs to not be model-specific nor unique.
+ */
+static const struct usb_device_id aiptek_ids[] = {
+	{USB_DEVICE(USB_VENDOR_ID_AIPTEK, 0x01)},
+	{USB_DEVICE(USB_VENDOR_ID_AIPTEK, 0x10)},
+	{USB_DEVICE(USB_VENDOR_ID_AIPTEK, 0x20)},
+	{USB_DEVICE(USB_VENDOR_ID_AIPTEK, 0x21)},
+	{USB_DEVICE(USB_VENDOR_ID_AIPTEK, 0x22)},
+	{USB_DEVICE(USB_VENDOR_ID_AIPTEK, 0x23)},
+	{USB_DEVICE(USB_VENDOR_ID_AIPTEK, 0x24)},
+	{}
+};
+
+MODULE_DEVICE_TABLE(usb, aiptek_ids);
+
+/***********************************************************************
+ * Open an instance of the tablet driver.
+ */
+static int aiptek_open(struct input_dev *inputdev)
+{
+	struct aiptek *aiptek = inputdev->private;
+
+	if (aiptek->openCount++ > 0) {
+		return 0;
+	}
+
+	aiptek->urb->dev = aiptek->usbdev;
+	if (usb_submit_urb(aiptek->urb, GFP_KERNEL) != 0) {
+		aiptek->openCount--;
+		return -EIO;
+	}
+
+	return 0;
+}
+
+/***********************************************************************
+ * Close an instance of the tablet driver.
+ */
+static void aiptek_close(struct input_dev *inputdev)
+{
+	struct aiptek *aiptek = inputdev->private;
+
+	if (--aiptek->openCount == 0) {
+		usb_kill_urb(aiptek->urb);
+	}
+}
+
+/***********************************************************************
+ * aiptek_set_report and aiptek_get_report() are borrowed from Linux 2.4.x, 
+ * where they were known as usb_set_report and usb_get_report.
+ */
+static int
+aiptek_set_report(struct aiptek *aiptek,
+		  unsigned char report_type,
+		  unsigned char report_id, void *buffer, int size)
+{
+	return usb_control_msg(aiptek->usbdev,
+			       usb_sndctrlpipe(aiptek->usbdev, 0),
+			       USB_REQ_SET_REPORT,
+			       USB_TYPE_CLASS | USB_RECIP_INTERFACE |
+			       USB_DIR_OUT, (report_type << 8) + report_id,
+			       aiptek->ifnum, buffer, size, 5000);
+}
+
+static int
+aiptek_get_report(struct aiptek *aiptek,
+		  unsigned char report_type,
+		  unsigned char report_id, void *buffer, int size)
+{
+	return usb_control_msg(aiptek->usbdev,
+			       usb_rcvctrlpipe(aiptek->usbdev, 0),
+			       USB_REQ_GET_REPORT,
+			       USB_TYPE_CLASS | USB_RECIP_INTERFACE |
+			       USB_DIR_IN, (report_type << 8) + report_id,
+			       aiptek->ifnum, buffer, size, 5000);
+}
+
+/***********************************************************************
+ * Send a command to the tablet.
+ */
+static int
+aiptek_command(struct aiptek *aiptek, unsigned char command, unsigned char data)
+{
+	const int sizeof_buf = 3 * sizeof(u8);
+	int ret;
+	u8 *buf;
+
+	buf = kmalloc(sizeof_buf, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	buf[0] = 2;
+	buf[1] = command;
+	buf[2] = data;
+
+	if ((ret =
+	     aiptek_set_report(aiptek, 3, 2, buf, sizeof_buf)) != sizeof_buf) {
+		dbg("aiptek_program: failed, tried to send: 0x%02x 0x%02x",
+		    command, data);
+	}
+	kfree(buf);
+	return ret < 0 ? ret : 0;
+}
+
+/***********************************************************************
+ * Retrieve information from the tablet. Querying info is defined as first
+ * sending the {command,data} sequence as a command, followed by a wait
+ * (aka, "programmaticDelay") and then a "read" request.
+ */
+static int
+aiptek_query(struct aiptek *aiptek, unsigned char command, unsigned char data)
+{
+	const int sizeof_buf = 3 * sizeof(u8);
+	int ret;
+	u8 *buf;
+
+	buf = kmalloc(sizeof_buf, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	buf[0] = 2;
+	buf[1] = command;
+	buf[2] = data;
+
+	if (aiptek_command(aiptek, command, data) != 0) {
+		kfree(buf);
+		return -EIO;
+	}
+	msleep(aiptek->curSetting.programmableDelay);
+
+	if ((ret =
+	     aiptek_get_report(aiptek, 3, 2, buf, sizeof_buf)) != sizeof_buf) {
+		dbg("aiptek_query failed: returned 0x%02x 0x%02x 0x%02x",
+		    buf[0], buf[1], buf[2]);
+		ret = -EIO;
+	} else {
+		ret = le16_to_cpu(get_unaligned((__le16 *) (buf + 1)));
+	}
+	kfree(buf);
+	return ret;
+}
+
+/***********************************************************************
+ * Program the tablet into either absolute or relative mode.
+ * We also get information about the tablet's size.
+ */
+static int aiptek_program_tablet(struct aiptek *aiptek)
+{
+	int ret;
+	/* Execute Resolution500LPI */
+	if ((ret = aiptek_command(aiptek, 0x18, 0x04)) < 0)
+		return ret;
+
+	/* Query getModelCode */
+	if ((ret = aiptek_query(aiptek, 0x02, 0x00)) < 0)
+		return ret;
+	aiptek->features.modelCode = ret & 0xff;
+
+	/* Query getODMCode */
+	if ((ret = aiptek_query(aiptek, 0x03, 0x00)) < 0)
+		return ret;
+	aiptek->features.odmCode = ret;
+
+	/* Query getFirmwareCode */
+	if ((ret = aiptek_query(aiptek, 0x04, 0x00)) < 0)
+		return ret;
+	aiptek->features.firmwareCode = ret;
+
+	/* Query getXextension */
+	if ((ret = aiptek_query(aiptek, 0x01, 0x00)) < 0)
+		return ret;
+	aiptek->inputdev.absmin[ABS_X] = 0;
+	aiptek->inputdev.absmax[ABS_X] = ret - 1;
+
+	/* Query getYextension */
+	if ((ret = aiptek_query(aiptek, 0x01, 0x01)) < 0)
+		return ret;
+	aiptek->inputdev.absmin[ABS_Y] = 0;
+	aiptek->inputdev.absmax[ABS_Y] = ret - 1;
+
+	/* Query getPressureLevels */
+	if ((ret = aiptek_query(aiptek, 0x08, 0x00)) < 0)
+		return ret;
+	aiptek->inputdev.absmin[ABS_PRESSURE] = 0;
+	aiptek->inputdev.absmax[ABS_PRESSURE] = ret - 1;
+
+	/* Depending on whether we are in absolute or relative mode, we will
+	 * do a switchToTablet(absolute) or switchToMouse(relative) command.
+	 */
+	if (aiptek->curSetting.coordinateMode ==
+	    AIPTEK_COORDINATE_ABSOLUTE_MODE) {
+		/* Execute switchToTablet */
+		if ((ret = aiptek_command(aiptek, 0x10, 0x01)) < 0) {
+			return ret;
+		}
+	} else {
+		/* Execute switchToMouse */
+		if ((ret = aiptek_command(aiptek, 0x10, 0x00)) < 0) {
+			return ret;
+		}
+	}
+
+	/* Enable the macro keys */
+	if ((ret = aiptek_command(aiptek, 0x11, 0x02)) < 0)
+		return ret;
+#if 0
+	/* Execute FilterOn */
+	if ((ret = aiptek_command(aiptek, 0x17, 0x00)) < 0)
+		return ret;
+#endif
+
+	/* Execute AutoGainOn */
+	if ((ret = aiptek_command(aiptek, 0x12, 0xff)) < 0)
+		return ret;
+
+	/* Reset the eventCount, so we track events from last (re)programming
+	 */
+	aiptek->diagnostic = AIPTEK_DIAGNOSTIC_NA;
+	aiptek->eventCount = 0;
+
+	return 0;
+}
+
+/***********************************************************************
+ * Sysfs functions. Sysfs prefers that individually-tunable parameters
+ * exist in their separate pseudo-files. Summary data that is immutable
+ * may exist in a singular file so long as you don't define a writeable
+ * interface.
+ */
+
+/***********************************************************************
+ * support the 'size' file -- display support
+ */
+static ssize_t show_tabletSize(struct device *dev, char *buf)
+{
+	struct aiptek *aiptek = dev_get_drvdata(dev);
+
+	if (aiptek == NULL)
+		return 0;
+
+	return snprintf(buf, PAGE_SIZE, "%dx%d\n",
+			aiptek->inputdev.absmax[ABS_X] + 1,
+			aiptek->inputdev.absmax[ABS_Y] + 1);
+}
+
+/* These structs define the sysfs files, param #1 is the name of the
+ * file, param 2 is the file permissions, param 3 & 4 are to the
+ * output generator and input parser routines. Absence of a routine is
+ * permitted -- it only means can't either 'cat' the file, or send data
+ * to it.
+ */
+static DEVICE_ATTR(size, S_IRUGO, show_tabletSize, NULL);
+
+/***********************************************************************
+ * support routines for the 'product_id' file
+ */
+static ssize_t show_tabletProductId(struct device *dev, char *buf)
+{
+	struct aiptek *aiptek = dev_get_drvdata(dev);
+
+	if (aiptek == NULL)
+		return 0;
+
+	return snprintf(buf, PAGE_SIZE, "0x%04x\n",
+			aiptek->inputdev.id.product);
+}
+
+static DEVICE_ATTR(product_id, S_IRUGO, show_tabletProductId, NULL);
+
+/***********************************************************************
+ * support routines for the 'vendor_id' file
+ */
+static ssize_t show_tabletVendorId(struct device *dev, char *buf)
+{
+	struct aiptek *aiptek = dev_get_drvdata(dev);
+
+	if (aiptek == NULL)
+		return 0;
+
+	return snprintf(buf, PAGE_SIZE, "0x%04x\n", aiptek->inputdev.id.vendor);
+}
+
+static DEVICE_ATTR(vendor_id, S_IRUGO, show_tabletVendorId, NULL);
+
+/***********************************************************************
+ * support routines for the 'vendor' file
+ */
+static ssize_t show_tabletManufacturer(struct device *dev, char *buf)
+{
+	struct aiptek *aiptek = dev_get_drvdata(dev);
+	int retval;
+
+	if (aiptek == NULL)
+		return 0;
+
+	retval = snprintf(buf, PAGE_SIZE, "%s\n", aiptek->usbdev->manufacturer);
+	return retval;
+}
+
+static DEVICE_ATTR(vendor, S_IRUGO, show_tabletManufacturer, NULL);
+
+/***********************************************************************
+ * support routines for the 'product' file
+ */
+static ssize_t show_tabletProduct(struct device *dev, char *buf)
+{
+	struct aiptek *aiptek = dev_get_drvdata(dev);
+	int retval;
+
+	if (aiptek == NULL)
+		return 0;
+
+	retval = snprintf(buf, PAGE_SIZE, "%s\n", aiptek->usbdev->product);
+	return retval;
+}
+
+static DEVICE_ATTR(product, S_IRUGO, show_tabletProduct, NULL);
+
+/***********************************************************************
+ * support routines for the 'pointer_mode' file. Note that this file
+ * both displays current setting and allows reprogramming.
+ */
+static ssize_t show_tabletPointerMode(struct device *dev, char *buf)
+{
+	struct aiptek *aiptek = dev_get_drvdata(dev);
+	char *s;
+
+	if (aiptek == NULL)
+		return 0;
+
+	switch (aiptek->curSetting.pointerMode) {
+	case AIPTEK_POINTER_ONLY_STYLUS_MODE:
+		s = "stylus";
+		break;
+
+	case AIPTEK_POINTER_ONLY_MOUSE_MODE:
+		s = "mouse";
+		break;
+
+	case AIPTEK_POINTER_EITHER_MODE:
+		s = "either";
+		break;
+
+	default:
+		s = "unknown";
+		break;
+	}
+	return snprintf(buf, PAGE_SIZE, "%s\n", s);
+}
+
+static ssize_t
+store_tabletPointerMode(struct device *dev, const char *buf, size_t count)
+{
+	struct aiptek *aiptek = dev_get_drvdata(dev);
+	if (aiptek == NULL)
+		return 0;
+
+	if (strcmp(buf, "stylus") == 0) {
+		aiptek->newSetting.pointerMode =
+		    AIPTEK_POINTER_ONLY_STYLUS_MODE;
+	} else if (strcmp(buf, "mouse") == 0) {
+		aiptek->newSetting.pointerMode = AIPTEK_POINTER_ONLY_MOUSE_MODE;
+	} else if (strcmp(buf, "either") == 0) {
+		aiptek->newSetting.pointerMode = AIPTEK_POINTER_EITHER_MODE;
+	}
+	return count;
+}
+
+static DEVICE_ATTR(pointer_mode,
+		   S_IRUGO | S_IWUGO,
+		   show_tabletPointerMode, store_tabletPointerMode);
+
+/***********************************************************************
+ * support routines for the 'coordinate_mode' file. Note that this file
+ * both displays current setting and allows reprogramming.
+ */
+static ssize_t show_tabletCoordinateMode(struct device *dev, char *buf)
+{
+	struct aiptek *aiptek = dev_get_drvdata(dev);
+	char *s;
+
+	if (aiptek == NULL)
+		return 0;
+
+	switch (aiptek->curSetting.coordinateMode) {
+	case AIPTEK_COORDINATE_ABSOLUTE_MODE:
+		s = "absolute";
+		break;
+
+	case AIPTEK_COORDINATE_RELATIVE_MODE:
+		s = "relative";
+		break;
+
+	default:
+		s = "unknown";
+		break;
+	}
+	return snprintf(buf, PAGE_SIZE, "%s\n", s);
+}
+
+static ssize_t
+store_tabletCoordinateMode(struct device *dev, const char *buf, size_t count)
+{
+	struct aiptek *aiptek = dev_get_drvdata(dev);
+	if (aiptek == NULL)
+		return 0;
+
+	if (strcmp(buf, "absolute") == 0) {
+		aiptek->newSetting.pointerMode =
+		    AIPTEK_COORDINATE_ABSOLUTE_MODE;
+	} else if (strcmp(buf, "relative") == 0) {
+		aiptek->newSetting.pointerMode =
+		    AIPTEK_COORDINATE_RELATIVE_MODE;
+	}
+	return count;
+}
+
+static DEVICE_ATTR(coordinate_mode,
+		   S_IRUGO | S_IWUGO,
+		   show_tabletCoordinateMode, store_tabletCoordinateMode);
+
+/***********************************************************************
+ * support routines for the 'tool_mode' file. Note that this file
+ * both displays current setting and allows reprogramming.
+ */
+static ssize_t show_tabletToolMode(struct device *dev, char *buf)
+{
+	struct aiptek *aiptek = dev_get_drvdata(dev);
+	char *s;
+
+	if (aiptek == NULL)
+		return 0;
+
+	switch (TOOL_BUTTON(aiptek->curSetting.toolMode)) {
+	case AIPTEK_TOOL_BUTTON_MOUSE_MODE:
+		s = "mouse";
+		break;
+
+	case AIPTEK_TOOL_BUTTON_ERASER_MODE:
+		s = "eraser";
+		break;
+
+	case AIPTEK_TOOL_BUTTON_PENCIL_MODE:
+		s = "pencil";
+		break;
+
+	case AIPTEK_TOOL_BUTTON_PEN_MODE:
+		s = "pen";
+		break;
+
+	case AIPTEK_TOOL_BUTTON_BRUSH_MODE:
+		s = "brush";
+		break;
+
+	case AIPTEK_TOOL_BUTTON_AIRBRUSH_MODE:
+		s = "airbrush";
+		break;
+
+	case AIPTEK_TOOL_BUTTON_LENS_MODE:
+		s = "lens";
+		break;
+
+	default:
+		s = "unknown";
+		break;
+	}
+	return snprintf(buf, PAGE_SIZE, "%s\n", s);
+}
+
+static ssize_t
+store_tabletToolMode(struct device *dev, const char *buf, size_t count)
+{
+	struct aiptek *aiptek = dev_get_drvdata(dev);
+	if (aiptek == NULL)
+		return 0;
+
+	if (strcmp(buf, "mouse") == 0) {
+		aiptek->newSetting.toolMode = AIPTEK_TOOL_BUTTON_MOUSE_MODE;
+	} else if (strcmp(buf, "eraser") == 0) {
+		aiptek->newSetting.toolMode = AIPTEK_TOOL_BUTTON_ERASER_MODE;
+	} else if (strcmp(buf, "pencil") == 0) {
+		aiptek->newSetting.toolMode = AIPTEK_TOOL_BUTTON_PENCIL_MODE;
+	} else if (strcmp(buf, "pen") == 0) {
+		aiptek->newSetting.toolMode = AIPTEK_TOOL_BUTTON_PEN_MODE;
+	} else if (strcmp(buf, "brush") == 0) {
+		aiptek->newSetting.toolMode = AIPTEK_TOOL_BUTTON_BRUSH_MODE;
+	} else if (strcmp(buf, "airbrush") == 0) {
+		aiptek->newSetting.toolMode = AIPTEK_TOOL_BUTTON_AIRBRUSH_MODE;
+	} else if (strcmp(buf, "lens") == 0) {
+		aiptek->newSetting.toolMode = AIPTEK_TOOL_BUTTON_LENS_MODE;
+	}
+
+	return count;
+}
+
+static DEVICE_ATTR(tool_mode,
+		   S_IRUGO | S_IWUGO,
+		   show_tabletToolMode, store_tabletToolMode);
+
+/***********************************************************************
+ * support routines for the 'xtilt' file. Note that this file
+ * both displays current setting and allows reprogramming.
+ */
+static ssize_t show_tabletXtilt(struct device *dev, char *buf)
+{
+	struct aiptek *aiptek = dev_get_drvdata(dev);
+
+	if (aiptek == NULL)
+		return 0;
+
+	if (aiptek->curSetting.xTilt == AIPTEK_TILT_DISABLE) {
+		return snprintf(buf, PAGE_SIZE, "disable\n");
+	} else {
+		return snprintf(buf, PAGE_SIZE, "%d\n",
+				aiptek->curSetting.xTilt);
+	}
+}
+
+static ssize_t
+store_tabletXtilt(struct device *dev, const char *buf, size_t count)
+{
+	struct aiptek *aiptek = dev_get_drvdata(dev);
+	int x;
+
+	if (aiptek == NULL)
+		return 0;
+
+	if (strcmp(buf, "disable") == 0) {
+		aiptek->newSetting.xTilt = AIPTEK_TILT_DISABLE;
+	} else {
+		x = (int)simple_strtol(buf, NULL, 10);
+		if (x >= AIPTEK_TILT_MIN && x <= AIPTEK_TILT_MAX) {
+			aiptek->newSetting.xTilt = x;
+		}
+	}
+	return count;
+}
+
+static DEVICE_ATTR(xtilt,
+		   S_IRUGO | S_IWUGO, show_tabletXtilt, store_tabletXtilt);
+
+/***********************************************************************
+ * support routines for the 'ytilt' file. Note that this file
+ * both displays current setting and allows reprogramming.
+ */
+static ssize_t show_tabletYtilt(struct device *dev, char *buf)
+{
+	struct aiptek *aiptek = dev_get_drvdata(dev);
+
+	if (aiptek == NULL)
+		return 0;
+
+	if (aiptek->curSetting.yTilt == AIPTEK_TILT_DISABLE) {
+		return snprintf(buf, PAGE_SIZE, "disable\n");
+	} else {
+		return snprintf(buf, PAGE_SIZE, "%d\n",
+				aiptek->curSetting.yTilt);
+	}
+}
+
+static ssize_t
+store_tabletYtilt(struct device *dev, const char *buf, size_t count)
+{
+	struct aiptek *aiptek = dev_get_drvdata(dev);
+	int y;
+
+	if (aiptek == NULL)
+		return 0;
+
+	if (strcmp(buf, "disable") == 0) {
+		aiptek->newSetting.yTilt = AIPTEK_TILT_DISABLE;
+	} else {
+		y = (int)simple_strtol(buf, NULL, 10);
+		if (y >= AIPTEK_TILT_MIN && y <= AIPTEK_TILT_MAX) {
+			aiptek->newSetting.yTilt = y;
+		}
+	}
+	return count;
+}
+
+static DEVICE_ATTR(ytilt,
+		   S_IRUGO | S_IWUGO, show_tabletYtilt, store_tabletYtilt);
+
+/***********************************************************************
+ * support routines for the 'jitter' file. Note that this file
+ * both displays current setting and allows reprogramming.
+ */
+static ssize_t show_tabletJitterDelay(struct device *dev, char *buf)
+{
+	struct aiptek *aiptek = dev_get_drvdata(dev);
+
+	if (aiptek == NULL)
+		return 0;
+
+	return snprintf(buf, PAGE_SIZE, "%d\n", aiptek->curSetting.jitterDelay);
+}
+
+static ssize_t
+store_tabletJitterDelay(struct device *dev, const char *buf, size_t count)
+{
+	struct aiptek *aiptek = dev_get_drvdata(dev);
+
+	if (aiptek == NULL)
+		return 0;
+
+	aiptek->newSetting.jitterDelay = (int)simple_strtol(buf, NULL, 10);
+	return count;
+}
+
+static DEVICE_ATTR(jitter,
+		   S_IRUGO | S_IWUGO,
+		   show_tabletJitterDelay, store_tabletJitterDelay);
+
+/***********************************************************************
+ * support routines for the 'delay' file. Note that this file
+ * both displays current setting and allows reprogramming.
+ */
+static ssize_t show_tabletProgrammableDelay(struct device *dev, char *buf)
+{
+	struct aiptek *aiptek = dev_get_drvdata(dev);
+
+	if (aiptek == NULL)
+		return 0;
+
+	return snprintf(buf, PAGE_SIZE, "%d\n",
+			aiptek->curSetting.programmableDelay);
+}
+
+static ssize_t
+store_tabletProgrammableDelay(struct device *dev, const char *buf, size_t count)
+{
+	struct aiptek *aiptek = dev_get_drvdata(dev);
+
+	if (aiptek == NULL)
+		return 0;
+
+	aiptek->newSetting.programmableDelay = (int)simple_strtol(buf, NULL, 10);
+	return count;
+}
+
+static DEVICE_ATTR(delay,
+		   S_IRUGO | S_IWUGO,
+		   show_tabletProgrammableDelay, store_tabletProgrammableDelay);
+
+/***********************************************************************
+ * support routines for the 'input_path' file. Note that this file
+ * only displays current setting.
+ */
+static ssize_t show_tabletInputDevice(struct device *dev, char *buf)
+{
+	struct aiptek *aiptek = dev_get_drvdata(dev);
+
+	if (aiptek == NULL)
+		return 0;
+
+	return snprintf(buf, PAGE_SIZE, "/dev/input/%s\n",
+			aiptek->features.inputPath);
+}
+
+static DEVICE_ATTR(input_path, S_IRUGO, show_tabletInputDevice, NULL);
+
+/***********************************************************************
+ * support routines for the 'event_count' file. Note that this file
+ * only displays current setting.
+ */
+static ssize_t show_tabletEventsReceived(struct device *dev, char *buf)
+{
+	struct aiptek *aiptek = dev_get_drvdata(dev);
+
+	if (aiptek == NULL)
+		return 0;
+
+	return snprintf(buf, PAGE_SIZE, "%ld\n", aiptek->eventCount);
+}
+
+static DEVICE_ATTR(event_count, S_IRUGO, show_tabletEventsReceived, NULL);
+
+/***********************************************************************
+ * support routines for the 'diagnostic' file. Note that this file
+ * only displays current setting.
+ */
+static ssize_t show_tabletDiagnosticMessage(struct device *dev, char *buf)
+{
+	struct aiptek *aiptek = dev_get_drvdata(dev);
+	char *retMsg;
+
+	if (aiptek == NULL)
+		return 0;
+
+	switch (aiptek->diagnostic) {
+	case AIPTEK_DIAGNOSTIC_NA:
+		retMsg = "no errors\n";
+		break;
+
+	case AIPTEK_DIAGNOSTIC_SENDING_RELATIVE_IN_ABSOLUTE:
+		retMsg = "Error: receiving relative reports\n";
+		break;
+
+	case AIPTEK_DIAGNOSTIC_SENDING_ABSOLUTE_IN_RELATIVE:
+		retMsg = "Error: receiving absolute reports\n";
+		break;
+
+	case AIPTEK_DIAGNOSTIC_TOOL_DISALLOWED:
+		if (aiptek->curSetting.pointerMode ==
+		    AIPTEK_POINTER_ONLY_MOUSE_MODE) {
+			retMsg = "Error: receiving stylus reports\n";
+		} else {
+			retMsg = "Error: receiving mouse reports\n";
+		}
+		break;
+
+	default:
+		return 0;
+	}
+	return snprintf(buf, PAGE_SIZE, retMsg);
+}
+
+static DEVICE_ATTR(diagnostic, S_IRUGO, show_tabletDiagnosticMessage, NULL);
+
+/***********************************************************************
+ * support routines for the 'stylus_upper' file. Note that this file
+ * both displays current setting and allows for setting changing.
+ */
+static ssize_t show_tabletStylusUpper(struct device *dev, char *buf)
+{
+	struct aiptek *aiptek = dev_get_drvdata(dev);
+	char *s;
+
+	if (aiptek == NULL)
+		return 0;
+
+	switch (aiptek->curSetting.stylusButtonUpper) {
+	case AIPTEK_STYLUS_UPPER_BUTTON:
+		s = "upper";
+		break;
+
+	case AIPTEK_STYLUS_LOWER_BUTTON:
+		s = "lower";
+		break;
+
+	default:
+		s = "unknown";
+		break;
+	}
+	return snprintf(buf, PAGE_SIZE, "%s\n", s);
+}
+
+static ssize_t
+store_tabletStylusUpper(struct device *dev, const char *buf, size_t count)
+{
+	struct aiptek *aiptek = dev_get_drvdata(dev);
+
+	if (aiptek == NULL)
+		return 0;
+
+	if (strcmp(buf, "upper") == 0) {
+		aiptek->newSetting.stylusButtonUpper =
+		    AIPTEK_STYLUS_UPPER_BUTTON;
+	} else if (strcmp(buf, "lower") == 0) {
+		aiptek->newSetting.stylusButtonUpper =
+		    AIPTEK_STYLUS_LOWER_BUTTON;
+	}
+	return count;
+}
+
+static DEVICE_ATTR(stylus_upper,
+		   S_IRUGO | S_IWUGO,
+		   show_tabletStylusUpper, store_tabletStylusUpper);
+
+/***********************************************************************
+ * support routines for the 'stylus_lower' file. Note that this file
+ * both displays current setting and allows for setting changing.
+ */
+static ssize_t show_tabletStylusLower(struct device *dev, char *buf)
+{
+	struct aiptek *aiptek = dev_get_drvdata(dev);
+	char *s;
+
+	if (aiptek == NULL)
+		return 0;
+
+	switch (aiptek->curSetting.stylusButtonLower) {
+	case AIPTEK_STYLUS_UPPER_BUTTON:
+		s = "upper";
+		break;
+
+	case AIPTEK_STYLUS_LOWER_BUTTON:
+		s = "lower";
+		break;
+
+	default:
+		s = "unknown";
+		break;
+	}
+	return snprintf(buf, PAGE_SIZE, "%s\n", s);
+}
+
+static ssize_t
+store_tabletStylusLower(struct device *dev, const char *buf, size_t count)
+{
+	struct aiptek *aiptek = dev_get_drvdata(dev);
+
+	if (aiptek == NULL)
+		return 0;
+
+	if (strcmp(buf, "upper") == 0) {
+		aiptek->newSetting.stylusButtonLower =
+		    AIPTEK_STYLUS_UPPER_BUTTON;
+	} else if (strcmp(buf, "lower") == 0) {
+		aiptek->newSetting.stylusButtonLower =
+		    AIPTEK_STYLUS_LOWER_BUTTON;
+	}
+	return count;
+}
+
+static DEVICE_ATTR(stylus_lower,
+		   S_IRUGO | S_IWUGO,
+		   show_tabletStylusLower, store_tabletStylusLower);
+
+/***********************************************************************
+ * support routines for the 'mouse_left' file. Note that this file
+ * both displays current setting and allows for setting changing.
+ */
+static ssize_t show_tabletMouseLeft(struct device *dev, char *buf)
+{
+	struct aiptek *aiptek = dev_get_drvdata(dev);
+	char *s;
+
+	if (aiptek == NULL)
+		return 0;
+
+	switch (aiptek->curSetting.mouseButtonLeft) {
+	case AIPTEK_MOUSE_LEFT_BUTTON:
+		s = "left";
+		break;
+
+	case AIPTEK_MOUSE_MIDDLE_BUTTON:
+		s = "middle";
+		break;
+
+	case AIPTEK_MOUSE_RIGHT_BUTTON:
+		s = "right";
+		break;
+
+	default:
+		s = "unknown";
+		break;
+	}
+	return snprintf(buf, PAGE_SIZE, "%s\n", s);
+}
+
+static ssize_t
+store_tabletMouseLeft(struct device *dev, const char *buf, size_t count)
+{
+	struct aiptek *aiptek = dev_get_drvdata(dev);
+
+	if (aiptek == NULL)
+		return 0;
+
+	if (strcmp(buf, "left") == 0) {
+		aiptek->newSetting.mouseButtonLeft = AIPTEK_MOUSE_LEFT_BUTTON;
+	} else if (strcmp(buf, "middle") == 0) {
+		aiptek->newSetting.mouseButtonLeft = AIPTEK_MOUSE_MIDDLE_BUTTON;
+	} else if (strcmp(buf, "right") == 0) {
+		aiptek->newSetting.mouseButtonLeft = AIPTEK_MOUSE_RIGHT_BUTTON;
+	}
+	return count;
+}
+
+static DEVICE_ATTR(mouse_left,
+		   S_IRUGO | S_IWUGO,
+		   show_tabletMouseLeft, store_tabletMouseLeft);
+
+/***********************************************************************
+ * support routines for the 'mouse_middle' file. Note that this file
+ * both displays current setting and allows for setting changing.
+ */
+static ssize_t show_tabletMouseMiddle(struct device *dev, char *buf)
+{
+	struct aiptek *aiptek = dev_get_drvdata(dev);
+	char *s;
+
+	if (aiptek == NULL)
+		return 0;
+
+	switch (aiptek->curSetting.mouseButtonMiddle) {
+	case AIPTEK_MOUSE_LEFT_BUTTON:
+		s = "left";
+		break;
+
+	case AIPTEK_MOUSE_MIDDLE_BUTTON:
+		s = "middle";
+		break;
+
+	case AIPTEK_MOUSE_RIGHT_BUTTON:
+		s = "right";
+		break;
+
+	default:
+		s = "unknown";
+		break;
+	}
+	return snprintf(buf, PAGE_SIZE, "%s\n", s);
+}
+
+static ssize_t
+store_tabletMouseMiddle(struct device *dev, const char *buf, size_t count)
+{
+	struct aiptek *aiptek = dev_get_drvdata(dev);
+
+	if (aiptek == NULL)
+		return 0;
+
+	if (strcmp(buf, "left") == 0) {
+		aiptek->newSetting.mouseButtonMiddle = AIPTEK_MOUSE_LEFT_BUTTON;
+	} else if (strcmp(buf, "middle") == 0) {
+		aiptek->newSetting.mouseButtonMiddle =
+		    AIPTEK_MOUSE_MIDDLE_BUTTON;
+	} else if (strcmp(buf, "right") == 0) {
+		aiptek->newSetting.mouseButtonMiddle =
+		    AIPTEK_MOUSE_RIGHT_BUTTON;
+	}
+	return count;
+}
+
+static DEVICE_ATTR(mouse_middle,
+		   S_IRUGO | S_IWUGO,
+		   show_tabletMouseMiddle, store_tabletMouseMiddle);
+
+/***********************************************************************
+ * support routines for the 'mouse_right' file. Note that this file
+ * both displays current setting and allows for setting changing.
+ */
+static ssize_t show_tabletMouseRight(struct device *dev, char *buf)
+{
+	struct aiptek *aiptek = dev_get_drvdata(dev);
+	char *s;
+
+	if (aiptek == NULL)
+		return 0;
+
+	switch (aiptek->curSetting.mouseButtonRight) {
+	case AIPTEK_MOUSE_LEFT_BUTTON:
+		s = "left";
+		break;
+
+	case AIPTEK_MOUSE_MIDDLE_BUTTON:
+		s = "middle";
+		break;
+
+	case AIPTEK_MOUSE_RIGHT_BUTTON:
+		s = "right";
+		break;
+
+	default:
+		s = "unknown";
+		break;
+	}
+	return snprintf(buf, PAGE_SIZE, "%s\n", s);
+}
+
+static ssize_t
+store_tabletMouseRight(struct device *dev, const char *buf, size_t count)
+{
+	struct aiptek *aiptek = dev_get_drvdata(dev);
+
+	if (aiptek == NULL)
+		return 0;
+
+	if (strcmp(buf, "left") == 0) {
+		aiptek->newSetting.mouseButtonRight = AIPTEK_MOUSE_LEFT_BUTTON;
+	} else if (strcmp(buf, "middle") == 0) {
+		aiptek->newSetting.mouseButtonRight =
+		    AIPTEK_MOUSE_MIDDLE_BUTTON;
+	} else if (strcmp(buf, "right") == 0) {
+		aiptek->newSetting.mouseButtonRight = AIPTEK_MOUSE_RIGHT_BUTTON;
+	}
+	return count;
+}
+
+static DEVICE_ATTR(mouse_right,
+		   S_IRUGO | S_IWUGO,
+		   show_tabletMouseRight, store_tabletMouseRight);
+
+/***********************************************************************
+ * support routines for the 'wheel' file. Note that this file
+ * both displays current setting and allows for setting changing.
+ */
+static ssize_t show_tabletWheel(struct device *dev, char *buf)
+{
+	struct aiptek *aiptek = dev_get_drvdata(dev);
+
+	if (aiptek == NULL)
+		return 0;
+
+	if (aiptek->curSetting.wheel == AIPTEK_WHEEL_DISABLE) {
+		return snprintf(buf, PAGE_SIZE, "disable\n");
+	} else {
+		return snprintf(buf, PAGE_SIZE, "%d\n",
+				aiptek->curSetting.wheel);
+	}
+}
+
+static ssize_t
+store_tabletWheel(struct device *dev, const char *buf, size_t count)
+{
+	struct aiptek *aiptek = dev_get_drvdata(dev);
+
+	if (aiptek == NULL)
+		return 0;
+
+	aiptek->newSetting.wheel = (int)simple_strtol(buf, NULL, 10);
+	return count;
+}
+
+static DEVICE_ATTR(wheel,
+		   S_IRUGO | S_IWUGO, show_tabletWheel, store_tabletWheel);
+
+/***********************************************************************
+ * support routines for the 'execute' file. Note that this file
+ * both displays current setting and allows for setting changing.
+ */
+static ssize_t show_tabletExecute(struct device *dev, char *buf)
+{
+	struct aiptek *aiptek = dev_get_drvdata(dev);
+
+	if (aiptek == NULL)
+		return 0;
+
+	/* There is nothing useful to display, so a one-line manual
+	 * is in order...
+	 */
+	return snprintf(buf, PAGE_SIZE,
+			"Write anything to this file to program your tablet.\n");
+}
+
+static ssize_t
+store_tabletExecute(struct device *dev, const char *buf, size_t count)
+{
+	struct aiptek *aiptek = dev_get_drvdata(dev);
+
+	if (aiptek == NULL)
+		return 0;
+
+	/* We do not care what you write to this file. Merely the action
+	 * of writing to this file triggers a tablet reprogramming.
+	 */
+	memcpy(&aiptek->curSetting, &aiptek->newSetting,
+	       sizeof(struct aiptek_settings));
+
+	if (aiptek_program_tablet(aiptek) < 0)
+		return -EIO;
+
+	return count;
+}
+
+static DEVICE_ATTR(execute,
+		   S_IRUGO | S_IWUGO, show_tabletExecute, store_tabletExecute);
+
+/***********************************************************************
+ * support routines for the 'odm_code' file. Note that this file
+ * only displays current setting.
+ */
+static ssize_t show_tabletODMCode(struct device *dev, char *buf)
+{
+	struct aiptek *aiptek = dev_get_drvdata(dev);
+
+	if (aiptek == NULL)
+		return 0;
+
+	return snprintf(buf, PAGE_SIZE, "0x%04x\n", aiptek->features.odmCode);
+}
+
+static DEVICE_ATTR(odm_code, S_IRUGO, show_tabletODMCode, NULL);
+
+/***********************************************************************
+ * support routines for the 'model_code' file. Note that this file
+ * only displays current setting.
+ */
+static ssize_t show_tabletModelCode(struct device *dev, char *buf)
+{
+	struct aiptek *aiptek = dev_get_drvdata(dev);
+
+	if (aiptek == NULL)
+		return 0;
+
+	return snprintf(buf, PAGE_SIZE, "0x%04x\n", aiptek->features.modelCode);
+}
+
+static DEVICE_ATTR(model_code, S_IRUGO, show_tabletModelCode, NULL);
+
+/***********************************************************************
+ * support routines for the 'firmware_code' file. Note that this file
+ * only displays current setting.
+ */
+static ssize_t show_firmwareCode(struct device *dev, char *buf)
+{
+	struct aiptek *aiptek = dev_get_drvdata(dev);
+
+	if (aiptek == NULL)
+		return 0;
+
+	return snprintf(buf, PAGE_SIZE, "%04x\n",
+			aiptek->features.firmwareCode);
+}
+
+static DEVICE_ATTR(firmware_code, S_IRUGO, show_firmwareCode, NULL);
+
+/***********************************************************************
+ * This routine removes all existing sysfs files managed by this device
+ * driver.
+ */
+static void aiptek_delete_files(struct device *dev)
+{
+	device_remove_file(dev, &dev_attr_size);
+	device_remove_file(dev, &dev_attr_product_id);
+	device_remove_file(dev, &dev_attr_vendor_id);
+	device_remove_file(dev, &dev_attr_vendor);
+	device_remove_file(dev, &dev_attr_product);
+	device_remove_file(dev, &dev_attr_pointer_mode);
+	device_remove_file(dev, &dev_attr_coordinate_mode);
+	device_remove_file(dev, &dev_attr_tool_mode);
+	device_remove_file(dev, &dev_attr_xtilt);
+	device_remove_file(dev, &dev_attr_ytilt);
+	device_remove_file(dev, &dev_attr_jitter);
+	device_remove_file(dev, &dev_attr_delay);
+	device_remove_file(dev, &dev_attr_input_path);
+	device_remove_file(dev, &dev_attr_event_count);
+	device_remove_file(dev, &dev_attr_diagnostic);
+	device_remove_file(dev, &dev_attr_odm_code);
+	device_remove_file(dev, &dev_attr_model_code);
+	device_remove_file(dev, &dev_attr_firmware_code);
+	device_remove_file(dev, &dev_attr_stylus_lower);
+	device_remove_file(dev, &dev_attr_stylus_upper);
+	device_remove_file(dev, &dev_attr_mouse_left);
+	device_remove_file(dev, &dev_attr_mouse_middle);
+	device_remove_file(dev, &dev_attr_mouse_right);
+	device_remove_file(dev, &dev_attr_wheel);
+	device_remove_file(dev, &dev_attr_execute);
+}
+
+/***********************************************************************
+ * This routine creates the sysfs files managed by this device
+ * driver.
+ */
+static int aiptek_add_files(struct device *dev)
+{
+	int ret;
+
+	if ((ret = device_create_file(dev, &dev_attr_size)) ||
+	    (ret = device_create_file(dev, &dev_attr_product_id)) ||
+	    (ret = device_create_file(dev, &dev_attr_vendor_id)) ||
+	    (ret = device_create_file(dev, &dev_attr_vendor)) ||
+	    (ret = device_create_file(dev, &dev_attr_product)) ||
+	    (ret = device_create_file(dev, &dev_attr_pointer_mode)) ||
+	    (ret = device_create_file(dev, &dev_attr_coordinate_mode)) ||
+	    (ret = device_create_file(dev, &dev_attr_tool_mode)) ||
+	    (ret = device_create_file(dev, &dev_attr_xtilt)) ||
+	    (ret = device_create_file(dev, &dev_attr_ytilt)) ||
+	    (ret = device_create_file(dev, &dev_attr_jitter)) ||
+	    (ret = device_create_file(dev, &dev_attr_delay)) ||
+	    (ret = device_create_file(dev, &dev_attr_input_path)) ||
+	    (ret = device_create_file(dev, &dev_attr_event_count)) ||
+	    (ret = device_create_file(dev, &dev_attr_diagnostic)) ||
+	    (ret = device_create_file(dev, &dev_attr_odm_code)) ||
+	    (ret = device_create_file(dev, &dev_attr_model_code)) ||
+	    (ret = device_create_file(dev, &dev_attr_firmware_code)) ||
+	    (ret = device_create_file(dev, &dev_attr_stylus_lower)) ||
+	    (ret = device_create_file(dev, &dev_attr_stylus_upper)) ||
+	    (ret = device_create_file(dev, &dev_attr_mouse_left)) ||
+	    (ret = device_create_file(dev, &dev_attr_mouse_middle)) ||
+	    (ret = device_create_file(dev, &dev_attr_mouse_right)) ||
+	    (ret = device_create_file(dev, &dev_attr_wheel)) ||
+	    (ret = device_create_file(dev, &dev_attr_execute))) {
+		err("aiptek: killing own sysfs device files\n");
+		aiptek_delete_files(dev);
+	}
+	return ret;
+}
+
+/***********************************************************************
+ * This routine is called when a tablet has been identified. It basically
+ * sets up the tablet and the driver's internal structures.
+ */
+static int
+aiptek_probe(struct usb_interface *intf, const struct usb_device_id *id)
+{
+	struct usb_device *usbdev = interface_to_usbdev(intf);
+	struct usb_endpoint_descriptor *endpoint;
+	struct aiptek *aiptek;
+	struct input_dev *inputdev;
+	struct input_handle *inputhandle;
+	struct list_head *node, *next;
+	char path[64 + 1];
+	int i;
+	int speeds[] = { 0,
+		AIPTEK_PROGRAMMABLE_DELAY_50,
+		AIPTEK_PROGRAMMABLE_DELAY_400,
+		AIPTEK_PROGRAMMABLE_DELAY_25,
+		AIPTEK_PROGRAMMABLE_DELAY_100,
+		AIPTEK_PROGRAMMABLE_DELAY_200,
+		AIPTEK_PROGRAMMABLE_DELAY_300
+	};
+
+	/* programmableDelay is where the command-line specified
+	 * delay is kept. We make it the first element of speeds[],
+	 * so therefore, your override speed is tried first, then the
+	 * remainder. Note that the default value of 400ms will be tried
+	 * if you do not specify any command line parameter.
+	 */
+	speeds[0] = programmableDelay;
+
+	if ((aiptek = kmalloc(sizeof(struct aiptek), GFP_KERNEL)) == NULL)
+		return -ENOMEM;
+	memset(aiptek, 0, sizeof(struct aiptek));
+
+	aiptek->data = usb_buffer_alloc(usbdev, AIPTEK_PACKET_LENGTH,
+					SLAB_ATOMIC, &aiptek->data_dma);
+	if (aiptek->data == NULL) {
+		kfree(aiptek);
+		return -ENOMEM;
+	}
+
+	aiptek->urb = usb_alloc_urb(0, GFP_KERNEL);
+	if (aiptek->urb == NULL) {
+		usb_buffer_free(usbdev, AIPTEK_PACKET_LENGTH, aiptek->data,
+				aiptek->data_dma);
+		kfree(aiptek);
+		return -ENOMEM;
+	}
+
+	/* Set up the curSettings struct. Said struct contains the current
+	 * programmable parameters. The newSetting struct contains changes
+	 * the user makes to the settings via the sysfs interface. Those
+	 * changes are not "committed" to curSettings until the user
+	 * writes to the sysfs/.../execute file.
+	 */
+	aiptek->curSetting.pointerMode = AIPTEK_POINTER_EITHER_MODE;
+	aiptek->curSetting.coordinateMode = AIPTEK_COORDINATE_ABSOLUTE_MODE;
+	aiptek->curSetting.toolMode = AIPTEK_TOOL_BUTTON_PEN_MODE;
+	aiptek->curSetting.xTilt = AIPTEK_TILT_DISABLE;
+	aiptek->curSetting.yTilt = AIPTEK_TILT_DISABLE;
+	aiptek->curSetting.mouseButtonLeft = AIPTEK_MOUSE_LEFT_BUTTON;
+	aiptek->curSetting.mouseButtonMiddle = AIPTEK_MOUSE_MIDDLE_BUTTON;
+	aiptek->curSetting.mouseButtonRight = AIPTEK_MOUSE_RIGHT_BUTTON;
+	aiptek->curSetting.stylusButtonUpper = AIPTEK_STYLUS_UPPER_BUTTON;
+	aiptek->curSetting.stylusButtonLower = AIPTEK_STYLUS_LOWER_BUTTON;
+	aiptek->curSetting.jitterDelay = jitterDelay;
+	aiptek->curSetting.programmableDelay = programmableDelay;
+
+	/* Both structs should have equivalent settings
+	 */
+	memcpy(&aiptek->newSetting, &aiptek->curSetting,
+	       sizeof(struct aiptek_settings));
+
+	/* Now program the capacities of the tablet, in terms of being
+	 * an input device.
+	 */
+	aiptek->inputdev.evbit[0] |= BIT(EV_KEY)
+	    | BIT(EV_ABS)
+	    | BIT(EV_REL)
+	    | BIT(EV_MSC);
+
+	aiptek->inputdev.absbit[0] |=
+	    (BIT(ABS_X) |
+	     BIT(ABS_Y) |
+	     BIT(ABS_PRESSURE) |
+	     BIT(ABS_TILT_X) |
+	     BIT(ABS_TILT_Y) | BIT(ABS_WHEEL) | BIT(ABS_MISC));
+
+	aiptek->inputdev.relbit[0] |=
+	    (BIT(REL_X) | BIT(REL_Y) | BIT(REL_WHEEL) | BIT(REL_MISC));
+
+	aiptek->inputdev.keybit[LONG(BTN_LEFT)] |=
+	    (BIT(BTN_LEFT) | BIT(BTN_RIGHT) | BIT(BTN_MIDDLE));
+
+	aiptek->inputdev.keybit[LONG(BTN_DIGI)] |=
+	    (BIT(BTN_TOOL_PEN) |
+	     BIT(BTN_TOOL_RUBBER) |
+	     BIT(BTN_TOOL_PENCIL) |
+	     BIT(BTN_TOOL_AIRBRUSH) |
+	     BIT(BTN_TOOL_BRUSH) |
+	     BIT(BTN_TOOL_MOUSE) |
+	     BIT(BTN_TOOL_LENS) |
+	     BIT(BTN_TOUCH) | BIT(BTN_STYLUS) | BIT(BTN_STYLUS2));
+
+	aiptek->inputdev.mscbit[0] = BIT(MSC_SERIAL);
+
+	/* Programming the tablet macro keys needs to be done with a for loop
+	 * as the keycodes are discontiguous.
+	 */
+	for (i = 0; i < sizeof(macroKeyEvents) / sizeof(macroKeyEvents[0]); ++i)
+		set_bit(macroKeyEvents[i], aiptek->inputdev.keybit);
+
+	/* Set up client data, pointers to open and close routines
+	 * for the input device.
+	 */
+	aiptek->inputdev.private = aiptek;
+	aiptek->inputdev.open = aiptek_open;
+	aiptek->inputdev.close = aiptek_close;
+
+	/* Determine the usb devices' physical path.
+	 * Asketh not why we always pretend we're using "../input0",
+	 * but I suspect this will have to be refactored one
+	 * day if a single USB device can be a keyboard & a mouse
+	 * & a tablet, and the inputX number actually will tell
+	 * us something...
+	 */
+	if (usb_make_path(usbdev, path, 64) > 0)
+		sprintf(aiptek->features.usbPath, "%s/input0", path);
+
+	/* Program the input device coordinate capacities. We do not yet
+	 * know what maximum X, Y, and Z values are, so we're putting fake
+	 * values in. Later, we'll ask the tablet to put in the correct
+	 * values.
+	 */
+	aiptek->inputdev.absmin[ABS_X] = 0;
+	aiptek->inputdev.absmax[ABS_X] = 2999;
+	aiptek->inputdev.absmin[ABS_Y] = 0;
+	aiptek->inputdev.absmax[ABS_Y] = 2249;
+	aiptek->inputdev.absmin[ABS_PRESSURE] = 0;
+	aiptek->inputdev.absmax[ABS_PRESSURE] = 511;
+	aiptek->inputdev.absmin[ABS_TILT_X] = AIPTEK_TILT_MIN;
+	aiptek->inputdev.absmax[ABS_TILT_X] = AIPTEK_TILT_MAX;
+	aiptek->inputdev.absmin[ABS_TILT_Y] = AIPTEK_TILT_MIN;
+	aiptek->inputdev.absmax[ABS_TILT_Y] = AIPTEK_TILT_MAX;
+	aiptek->inputdev.absmin[ABS_WHEEL] = AIPTEK_WHEEL_MIN;
+	aiptek->inputdev.absmax[ABS_WHEEL] = AIPTEK_WHEEL_MAX - 1;
+	aiptek->inputdev.absfuzz[ABS_X] = 0;
+	aiptek->inputdev.absfuzz[ABS_Y] = 0;
+	aiptek->inputdev.absfuzz[ABS_PRESSURE] = 0;
+	aiptek->inputdev.absfuzz[ABS_TILT_X] = 0;
+	aiptek->inputdev.absfuzz[ABS_TILT_Y] = 0;
+	aiptek->inputdev.absfuzz[ABS_WHEEL] = 0;
+	aiptek->inputdev.absflat[ABS_X] = 0;
+	aiptek->inputdev.absflat[ABS_Y] = 0;
+	aiptek->inputdev.absflat[ABS_PRESSURE] = 0;
+	aiptek->inputdev.absflat[ABS_TILT_X] = 0;
+	aiptek->inputdev.absflat[ABS_TILT_Y] = 0;
+	aiptek->inputdev.absflat[ABS_WHEEL] = 0;
+	aiptek->inputdev.name = "Aiptek";
+	aiptek->inputdev.phys = aiptek->features.usbPath;
+	aiptek->inputdev.id.bustype = BUS_USB;
+	aiptek->inputdev.id.vendor = le16_to_cpu(usbdev->descriptor.idVendor);
+	aiptek->inputdev.id.product = le16_to_cpu(usbdev->descriptor.idProduct);
+	aiptek->inputdev.id.version = le16_to_cpu(usbdev->descriptor.bcdDevice);
+
+	aiptek->usbdev = usbdev;
+	aiptek->ifnum = intf->altsetting[0].desc.bInterfaceNumber;
+	aiptek->inDelay = 0;
+	aiptek->endDelay = 0;
+	aiptek->previousJitterable = 0;
+
+	endpoint = &intf->altsetting[0].endpoint[0].desc;
+
+	/* Go set up our URB, which is called when the tablet receives
+	 * input.
+	 */
+	usb_fill_int_urb(aiptek->urb,
+			 aiptek->usbdev,
+			 usb_rcvintpipe(aiptek->usbdev,
+					endpoint->bEndpointAddress),
+			 aiptek->data, 8, aiptek_irq, aiptek,
+			 endpoint->bInterval);
+
+	aiptek->urb->transfer_dma = aiptek->data_dma;
+	aiptek->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
+
+	/* Register the tablet as an Input Device
+	 */
+	input_register_device(&aiptek->inputdev);
+
+	/* We now will look for the evdev device which is mapped to
+	 * the tablet. The partial name is kept in the link list of
+	 * input_handles associated with this input device.
+	 * What identifies an evdev input_handler is that it begins
+	 * with 'event', continues with a digit, and that in turn
+	 * is mapped to /{devfs}/input/eventN.
+	 */
+	inputdev = &aiptek->inputdev;
+	list_for_each_safe(node, next, &inputdev->h_list) {
+		inputhandle = to_handle(node);
+		if (strncmp(inputhandle->name, "event", 5) == 0) {
+			strcpy(aiptek->features.inputPath, inputhandle->name);
+			break;
+		}
+	}
+
+	info("input: Aiptek on %s (%s)\n", path, aiptek->features.inputPath);
+
+	/* Program the tablet. This sets the tablet up in the mode
+	 * specified in newSetting, and also queries the tablet's
+	 * physical capacities.
+	 *
+	 * Sanity check: if a tablet doesn't like the slow programmatic
+	 * delay, we often get sizes of 0x0. Let's use that as an indicator
+	 * to try faster delays, up to 25 ms. If that logic fails, well, you'll
+	 * have to explain to us how your tablet thinks it's 0x0, and yet that's
+	 * not an error :-)
+	 */
+
+	for (i = 0; i < sizeof(speeds) / sizeof(speeds[0]); ++i) {
+		aiptek->curSetting.programmableDelay = speeds[i];
+		(void)aiptek_program_tablet(aiptek);
+		if (aiptek->inputdev.absmax[ABS_X] > 0) {
+			info("input: Aiptek using %d ms programming speed\n",
+			     aiptek->curSetting.programmableDelay);
+			break;
+		}
+	}
+
+	/* Associate this driver's struct with the usb interface.
+	 */
+	usb_set_intfdata(intf, aiptek);
+
+	/* Set up the sysfs files
+	 */
+	aiptek_add_files(&intf->dev);
+
+	/* Make sure the evdev module is loaded. Assuming evdev IS a module :-)
+	 */
+	if (request_module("evdev") != 0)
+		info("aiptek: error loading 'evdev' module");
+
+	return 0;
+}
+
+/* Forward declaration */
+static void aiptek_disconnect(struct usb_interface *intf);
+
+static struct usb_driver aiptek_driver = {
+	.owner = THIS_MODULE,
+	.name = "aiptek",
+	.probe = aiptek_probe,
+	.disconnect = aiptek_disconnect,
+	.id_table = aiptek_ids,
+};
+
+/***********************************************************************
+ * Deal with tablet disconnecting from the system.
+ */
+static void aiptek_disconnect(struct usb_interface *intf)
+{
+	struct aiptek *aiptek = usb_get_intfdata(intf);
+
+	/* Disassociate driver's struct with usb interface
+	 */
+	usb_set_intfdata(intf, NULL);
+	if (aiptek != NULL) {
+		/* Free & unhook everything from the system.
+		 */
+		usb_kill_urb(aiptek->urb);
+		input_unregister_device(&aiptek->inputdev);
+		aiptek_delete_files(&intf->dev);
+		usb_free_urb(aiptek->urb);
+		usb_buffer_free(interface_to_usbdev(intf),
+				AIPTEK_PACKET_LENGTH,
+				aiptek->data, aiptek->data_dma);
+		kfree(aiptek);
+		aiptek = NULL;
+	}
+}
+
+static int __init aiptek_init(void)
+{
+	int result = usb_register(&aiptek_driver);
+	if (result == 0) {
+		info(DRIVER_VERSION ": " DRIVER_AUTHOR);
+		info(DRIVER_DESC);
+	}
+	return result;
+}
+
+static void __exit aiptek_exit(void)
+{
+	usb_deregister(&aiptek_driver);
+}
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+
+module_param(programmableDelay, int, 0);
+MODULE_PARM_DESC(programmableDelay, "delay used during tablet programming");
+module_param(jitterDelay, int, 0);
+MODULE_PARM_DESC(jitterDelay, "stylus/mouse settlement delay");
+
+module_init(aiptek_init);
+module_exit(aiptek_exit);