OSCL-LXR linux-6.0.1/​drivers/​input/​tablet/​aiptek.c	Source navigation Diff markup Identifier search General search
	Version: linux-6.0.1 spark-3.0.0 hadoop-3.2.0-src hadoop-3.3.0-src spark-2.4.7 linux-4.15.13 hadoop-2.7.4-src Revert   Change

 // SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  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.
  */
 
 #include <linux/jiffies.h>
 #include <linux/kernel.h>
 #include <linux/slab.h>
 #include <linux/module.h>
 #include <linux/usb/input.h>
 #include <linux/uaccess.h>
 #include <asm/unaligned.h>
 
 /*
  * 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     1
  * 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     1
  * 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_VENDOR_ID_KYE               0x0458
 #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 the tool button has changed,
      * the tools get reset.
      */
     /* toolMode codes
      */
 #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        0x04
 #define AIPTEK_MOUSE_RIGHT_BUTTON       0x08
 #define AIPTEK_MOUSE_MIDDLE_BUTTON      0x10
 
     /* 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     */
 };
 
 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_interface *intf;     /* usb interface 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 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     */
 
     int lastMacro;              /* macro key to reset            */
     int previousToolMode;           /* pen, pencil, brush, etc. tool */
     unsigned char *data;            /* incoming packet data          */
 };
 
 static const int eventTypes[] = {
         EV_KEY, EV_ABS, EV_REL, EV_MSC,
 };
 
 static const int absEvents[] = {
         ABS_X, ABS_Y, ABS_PRESSURE, ABS_TILT_X, ABS_TILT_Y,
         ABS_WHEEL, ABS_MISC,
 };
 
 static const int relEvents[] = {
         REL_X, REL_Y, REL_WHEEL,
 };
 
 static const int buttonEvents[] = {
     BTN_LEFT, BTN_RIGHT, BTN_MIDDLE,
     BTN_TOOL_PEN, BTN_TOOL_RUBBER, BTN_TOOL_PENCIL, BTN_TOOL_AIRBRUSH,
     BTN_TOOL_BRUSH, BTN_TOOL_MOUSE, BTN_TOOL_LENS, BTN_TOUCH,
     BTN_STYLUS, BTN_STYLUS2,
 };
 
 /*
  * 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 const 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
 };
 
 /***********************************************************************
  * Map values to strings and back. Every map should have the following
  * as its last element: { NULL, AIPTEK_INVALID_VALUE }.
  */
 #define AIPTEK_INVALID_VALUE    -1
 
 struct aiptek_map {
     const char *string;
     int value;
 };
 
 static int map_str_to_val(const struct aiptek_map *map, const char *str, size_t count)
 {
     const struct aiptek_map *p;
 
     if (str[count - 1] == '\n')
         count--;
 
     for (p = map; p->string; p++)
             if (!strncmp(str, p->string, count))
             return p->value;
 
     return AIPTEK_INVALID_VALUE;
 }
 
 static const char *map_val_to_str(const struct aiptek_map *map, int val)
 {
     const struct aiptek_map *p;
 
     for (p = map; p->value != AIPTEK_INVALID_VALUE; p++)
         if (val == p->value)
             return p->string;
 
     return "unknown";
 }
 
 /***********************************************************************
  * 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 occurred while the tablet was in absolute or relative
  * mode.
  * Update: REL_MISC proved not to be such a good idea. With REL_MISC you
  * get an event transmitted each time. ABS_MISC works better, since it
  * can be set and re-set. Thus, only using ABS_MISC from now on.
  *
  * 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 aiptek *aiptek = urb->context;
     unsigned char *data = aiptek->data;
     struct input_dev *inputdev = aiptek->inputdev;
     struct usb_interface *intf = aiptek->intf;
     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 */
         dev_dbg(&intf->dev, "%s - urb shutting down with status: %d\n",
             __func__, urb->status);
         return;
 
     default:
         dev_dbg(&intf->dev, "%s - nonzero urb status received: %d\n",
             __func__, 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 {
             x = (signed char) data[2];
             y = (signed char) 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[1] & 0x07;
 
             left = (data[1] & aiptek->curSetting.mouseButtonLeft >> 2) != 0 ? 1 : 0;
             right = (data[1] & aiptek->curSetting.mouseButtonRight >> 2) != 0 ? 1 : 0;
             middle = (data[1] & aiptek->curSetting.mouseButtonMiddle >> 2) != 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_abs(inputdev, ABS_MISC,
                      1 | AIPTEK_REPORT_TOOL_UNKNOWN);
             input_report_rel(inputdev, REL_X, x);
             input_report_rel(inputdev, REL_Y, y);
 
             /* 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;
             }
             if (aiptek->lastMacro != -1) {
                     input_report_key(inputdev,
                          macroKeyEvents[aiptek->lastMacro], 0);
                 aiptek->lastMacro = -1;
             }
             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 {
             x = get_unaligned_le16(data + 1);
             y = get_unaligned_le16(data + 3);
             z = get_unaligned_le16(data + 6);
 
             dv = (data[5] & 0x01) != 0 ? 1 : 0;
             p = (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 the selected tool changed, reset the old
                  * tool key, and set the new one.
                  */
                 if (aiptek->previousToolMode !=
                     aiptek->curSetting.toolMode) {
                         input_report_key(inputdev,
                              aiptek->previousToolMode, 0);
                     input_report_key(inputdev,
                              aiptek->curSetting.toolMode,
                              1);
                     aiptek->previousToolMode =
                               aiptek->curSetting.toolMode;
                 }
 
                 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);
                 if (aiptek->lastMacro != -1) {
                             input_report_key(inputdev,
                              macroKeyEvents[aiptek->lastMacro], 0);
                     aiptek->lastMacro = -1;
                 }
                 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 {
             x = get_unaligned_le16(data + 1);
             y = get_unaligned_le16(data + 3);
 
             jitterable = data[5] & 0x1c;
 
             dv = (data[5] & 0x01) != 0 ? 1 : 0;
             p = (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 the selected tool changed, reset the old
                  * tool key, and set the new one.
                  */
                 if (aiptek->previousToolMode !=
                     aiptek->curSetting.toolMode) {
                         input_report_key(inputdev,
                              aiptek->previousToolMode, 0);
                     input_report_key(inputdev,
                              aiptek->curSetting.toolMode,
                              1);
                     aiptek->previousToolMode =
                               aiptek->curSetting.toolMode;
                 }
 
                 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_abs(inputdev, ABS_MISC, p | AIPTEK_REPORT_TOOL_MOUSE);
                 if (aiptek->lastMacro != -1) {
                             input_report_key(inputdev,
                              macroKeyEvents[aiptek->lastMacro], 0);
                         aiptek->lastMacro = -1;
                 }
                 input_sync(inputdev);
             }
         }
     }
     /* Report 4s come from the macro keys when pressed by stylus
      */
     else if (data[0] == 4) {
         jitterable = data[1] & 0x18;
 
         dv = (data[1] & 0x01) != 0 ? 1 : 0;
         p = (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 = dv && p && tip && !(data[3] & 1) ? (data[3] >> 1) : -1;
         z = get_unaligned_le16(data + 4);
 
         if (dv) {
                 /* If the selected tool changed, reset the old
              * tool key, and set the new one.
              */
                 if (aiptek->previousToolMode !=
                 aiptek->curSetting.toolMode) {
                     input_report_key(inputdev,
                          aiptek->previousToolMode, 0);
                 input_report_key(inputdev,
                          aiptek->curSetting.toolMode,
                          1);
                 aiptek->previousToolMode =
                         aiptek->curSetting.toolMode;
             }
         }
 
         if (aiptek->lastMacro != -1 && aiptek->lastMacro != macro) {
                 input_report_key(inputdev, macroKeyEvents[aiptek->lastMacro], 0);
             aiptek->lastMacro = -1;
         }
 
         if (macro != -1 && macro != aiptek->lastMacro) {
             input_report_key(inputdev, macroKeyEvents[macro], 1);
             aiptek->lastMacro = macro;
         }
         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;
 
         dv = (data[1] & 0x01) != 0 ? 1 : 0;
         p = (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 = dv && p && left && !(data[3] & 1) ? (data[3] >> 1) : 0;
 
         if (dv) {
                 /* If the selected tool changed, reset the old
              * tool key, and set the new one.
              */
                 if (aiptek->previousToolMode !=
                 aiptek->curSetting.toolMode) {
                         input_report_key(inputdev,
                          aiptek->previousToolMode, 0);
                     input_report_key(inputdev,
                          aiptek->curSetting.toolMode, 1);
                     aiptek->previousToolMode = aiptek->curSetting.toolMode;
             }
         }
 
         if (aiptek->lastMacro != -1 && aiptek->lastMacro != macro) {
                 input_report_key(inputdev, macroKeyEvents[aiptek->lastMacro], 0);
             aiptek->lastMacro = -1;
         }
 
         if (macro != -1 && macro != aiptek->lastMacro) {
             input_report_key(inputdev, macroKeyEvents[macro], 1);
             aiptek->lastMacro = macro;
         }
 
         input_report_abs(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 = get_unaligned_le16(data + 1);
         if (macro > 0) {
             input_report_key(inputdev, macroKeyEvents[macro - 1],
                      0);
         }
         if (macro < 25) {
             input_report_key(inputdev, macroKeyEvents[macro + 1],
                      0);
         }
 
         /* If the selected tool changed, reset the old
            tool key, and set the new one.
         */
         if (aiptek->previousToolMode !=
             aiptek->curSetting.toolMode) {
                 input_report_key(inputdev,
                      aiptek->previousToolMode, 0);
             input_report_key(inputdev,
                      aiptek->curSetting.toolMode,
                      1);
             aiptek->previousToolMode =
                 aiptek->curSetting.toolMode;
         }
 
         input_report_key(inputdev, macroKeyEvents[macro], 1);
         input_report_abs(inputdev, ABS_MISC,
                  1 | AIPTEK_REPORT_TOOL_UNKNOWN);
         input_sync(inputdev);
     } else {
         dev_dbg(&intf->dev, "Unknown report %d\n", 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) {
         dev_err(&intf->dev,
             "%s - usb_submit_urb failed with result %d\n",
             __func__, 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)},
     {USB_DEVICE(USB_VENDOR_ID_KYE, 0x5003)},
     {}
 };
 
 MODULE_DEVICE_TABLE(usb, aiptek_ids);
 
 /***********************************************************************
  * Open an instance of the tablet driver.
  */
 static int aiptek_open(struct input_dev *inputdev)
 {
     struct aiptek *aiptek = input_get_drvdata(inputdev);
 
     aiptek->urb->dev = interface_to_usbdev(aiptek->intf);
     if (usb_submit_urb(aiptek->urb, GFP_KERNEL) != 0)
         return -EIO;
 
     return 0;
 }
 
 /***********************************************************************
  * Close an instance of the tablet driver.
  */
 static void aiptek_close(struct input_dev *inputdev)
 {
     struct aiptek *aiptek = input_get_drvdata(inputdev);
 
     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)
 {
     struct usb_device *udev = interface_to_usbdev(aiptek->intf);
 
     return usb_control_msg(udev,
                    usb_sndctrlpipe(udev, 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)
 {
     struct usb_device *udev = interface_to_usbdev(aiptek->intf);
 
     return usb_control_msg(udev,
                    usb_rcvctrlpipe(udev, 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) {
         dev_dbg(&aiptek->intf->dev,
             "aiptek_program: failed, tried to send: 0x%02x 0x%02x\n",
             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 (aiptek_get_report(aiptek, 3, 2, buf, sizeof_buf) != sizeof_buf) {
         dev_dbg(&aiptek->intf->dev,
             "aiptek_query failed: returned 0x%02x 0x%02x 0x%02x\n",
             buf[0], buf[1], buf[2]);
         ret = -EIO;
     } else {
         ret = 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;
     input_set_abs_params(aiptek->inputdev, ABS_X, 0, ret - 1, 0, 0);
 
     /* Query getYextension */
     if ((ret = aiptek_query(aiptek, 0x01, 0x01)) < 0)
         return ret;
     input_set_abs_params(aiptek->inputdev, ABS_Y, 0, ret - 1, 0, 0);
 
     /* Query getPressureLevels */
     if ((ret = aiptek_query(aiptek, 0x08, 0x00)) < 0)
         return ret;
     input_set_abs_params(aiptek->inputdev, ABS_PRESSURE, 0, ret - 1, 0, 0);
 
     /* 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, struct device_attribute *attr, char *buf)
 {
     struct aiptek *aiptek = dev_get_drvdata(dev);
 
     return sysfs_emit(buf, "%dx%d\n",
               input_abs_get_max(aiptek->inputdev, ABS_X) + 1,
               input_abs_get_max(aiptek->inputdev, 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 'pointer_mode' file. Note that this file
  * both displays current setting and allows reprogramming.
  */
 static struct aiptek_map pointer_mode_map[] = {
     { "stylus", AIPTEK_POINTER_ONLY_STYLUS_MODE },
     { "mouse",  AIPTEK_POINTER_ONLY_MOUSE_MODE },
     { "either", AIPTEK_POINTER_EITHER_MODE },
     { NULL,     AIPTEK_INVALID_VALUE }
 };
 
 static ssize_t show_tabletPointerMode(struct device *dev, struct device_attribute *attr, char *buf)
 {
     struct aiptek *aiptek = dev_get_drvdata(dev);
 
     return sysfs_emit(buf, "%s\n", map_val_to_str(pointer_mode_map,
                               aiptek->curSetting.pointerMode));
 }
 
 static ssize_t
 store_tabletPointerMode(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
 {
     struct aiptek *aiptek = dev_get_drvdata(dev);
     int new_mode = map_str_to_val(pointer_mode_map, buf, count);
 
     if (new_mode == AIPTEK_INVALID_VALUE)
         return -EINVAL;
 
     aiptek->newSetting.pointerMode = new_mode;
     return count;
 }
 
 static DEVICE_ATTR(pointer_mode,
            S_IRUGO | S_IWUSR,
            show_tabletPointerMode, store_tabletPointerMode);
 
 /***********************************************************************
  * support routines for the 'coordinate_mode' file. Note that this file
  * both displays current setting and allows reprogramming.
  */
 
 static struct aiptek_map coordinate_mode_map[] = {
     { "absolute",   AIPTEK_COORDINATE_ABSOLUTE_MODE },
     { "relative",   AIPTEK_COORDINATE_RELATIVE_MODE },
     { NULL,     AIPTEK_INVALID_VALUE }
 };
 
 static ssize_t show_tabletCoordinateMode(struct device *dev, struct device_attribute *attr, char *buf)
 {
     struct aiptek *aiptek = dev_get_drvdata(dev);
 
     return sysfs_emit(buf, "%s\n", map_val_to_str(coordinate_mode_map,
                               aiptek->curSetting.coordinateMode));
 }
 
 static ssize_t
 store_tabletCoordinateMode(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
 {
     struct aiptek *aiptek = dev_get_drvdata(dev);
     int new_mode = map_str_to_val(coordinate_mode_map, buf, count);
 
     if (new_mode == AIPTEK_INVALID_VALUE)
         return -EINVAL;
 
     aiptek->newSetting.coordinateMode = new_mode;
     return count;
 }
 
 static DEVICE_ATTR(coordinate_mode,
            S_IRUGO | S_IWUSR,
            show_tabletCoordinateMode, store_tabletCoordinateMode);
 
 /***********************************************************************
  * support routines for the 'tool_mode' file. Note that this file
  * both displays current setting and allows reprogramming.
  */
 
 static struct aiptek_map tool_mode_map[] = {
     { "mouse",  AIPTEK_TOOL_BUTTON_MOUSE_MODE },
     { "eraser", AIPTEK_TOOL_BUTTON_ERASER_MODE },
     { "pencil", AIPTEK_TOOL_BUTTON_PENCIL_MODE },
     { "pen",    AIPTEK_TOOL_BUTTON_PEN_MODE },
     { "brush",  AIPTEK_TOOL_BUTTON_BRUSH_MODE },
     { "airbrush",   AIPTEK_TOOL_BUTTON_AIRBRUSH_MODE },
     { "lens",   AIPTEK_TOOL_BUTTON_LENS_MODE },
     { NULL,     AIPTEK_INVALID_VALUE }
 };
 
 static ssize_t show_tabletToolMode(struct device *dev, struct device_attribute *attr, char *buf)
 {
     struct aiptek *aiptek = dev_get_drvdata(dev);
 
     return sysfs_emit(buf, "%s\n", map_val_to_str(tool_mode_map,
                               aiptek->curSetting.toolMode));
 }
 
 static ssize_t
 store_tabletToolMode(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
 {
     struct aiptek *aiptek = dev_get_drvdata(dev);
     int new_mode = map_str_to_val(tool_mode_map, buf, count);
 
     if (new_mode == AIPTEK_INVALID_VALUE)
         return -EINVAL;
 
     aiptek->newSetting.toolMode = new_mode;
     return count;
 }
 
 static DEVICE_ATTR(tool_mode,
            S_IRUGO | S_IWUSR,
            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, struct device_attribute *attr, char *buf)
 {
     struct aiptek *aiptek = dev_get_drvdata(dev);
 
     if (aiptek->curSetting.xTilt == AIPTEK_TILT_DISABLE) {
         return sysfs_emit(buf, "disable\n");
     } else {
         return sysfs_emit(buf, "%d\n", aiptek->curSetting.xTilt);
     }
 }
 
 static ssize_t
 store_tabletXtilt(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
 {
     struct aiptek *aiptek = dev_get_drvdata(dev);
     int x;
 
     if (kstrtoint(buf, 10, &x)) {
         size_t len = buf[count - 1] == '\n' ? count - 1 : count;
 
         if (strncmp(buf, "disable", len))
             return -EINVAL;
 
         aiptek->newSetting.xTilt = AIPTEK_TILT_DISABLE;
     } else {
         if (x < AIPTEK_TILT_MIN || x > AIPTEK_TILT_MAX)
             return -EINVAL;
 
         aiptek->newSetting.xTilt = x;
     }
 
     return count;
 }
 
 static DEVICE_ATTR(xtilt,
            S_IRUGO | S_IWUSR, 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, struct device_attribute *attr, char *buf)
 {
     struct aiptek *aiptek = dev_get_drvdata(dev);
 
     if (aiptek->curSetting.yTilt == AIPTEK_TILT_DISABLE) {
         return sysfs_emit(buf, "disable\n");
     } else {
         return sysfs_emit(buf, "%d\n", aiptek->curSetting.yTilt);
     }
 }
 
 static ssize_t
 store_tabletYtilt(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
 {
     struct aiptek *aiptek = dev_get_drvdata(dev);
     int y;
 
     if (kstrtoint(buf, 10, &y)) {
         size_t len = buf[count - 1] == '\n' ? count - 1 : count;
 
         if (strncmp(buf, "disable", len))
             return -EINVAL;
 
         aiptek->newSetting.yTilt = AIPTEK_TILT_DISABLE;
     } else {
         if (y < AIPTEK_TILT_MIN || y > AIPTEK_TILT_MAX)
             return -EINVAL;
 
         aiptek->newSetting.yTilt = y;
     }
 
     return count;
 }
 
 static DEVICE_ATTR(ytilt,
            S_IRUGO | S_IWUSR, 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, struct device_attribute *attr, char *buf)
 {
     struct aiptek *aiptek = dev_get_drvdata(dev);
 
     return sysfs_emit(buf, "%d\n", aiptek->curSetting.jitterDelay);
 }
 
 static ssize_t
 store_tabletJitterDelay(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
 {
     struct aiptek *aiptek = dev_get_drvdata(dev);
     int err, j;
 
     err = kstrtoint(buf, 10, &j);
     if (err)
         return err;
 
     aiptek->newSetting.jitterDelay = j;
     return count;
 }
 
 static DEVICE_ATTR(jitter,
            S_IRUGO | S_IWUSR,
            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, struct device_attribute *attr, char *buf)
 {
     struct aiptek *aiptek = dev_get_drvdata(dev);
 
     return sysfs_emit(buf, "%d\n", aiptek->curSetting.programmableDelay);
 }
 
 static ssize_t
 store_tabletProgrammableDelay(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
 {
     struct aiptek *aiptek = dev_get_drvdata(dev);
     int err, d;
 
     err = kstrtoint(buf, 10, &d);
     if (err)
         return err;
 
     aiptek->newSetting.programmableDelay = d;
     return count;
 }
 
 static DEVICE_ATTR(delay,
            S_IRUGO | S_IWUSR,
            show_tabletProgrammableDelay, store_tabletProgrammableDelay);
 
 /***********************************************************************
  * support routines for the 'event_count' file. Note that this file
  * only displays current setting.
  */
 static ssize_t show_tabletEventsReceived(struct device *dev, struct device_attribute *attr, char *buf)
 {
     struct aiptek *aiptek = dev_get_drvdata(dev);
 
     return sysfs_emit(buf, "%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, struct device_attribute *attr, char *buf)
 {
     struct aiptek *aiptek = dev_get_drvdata(dev);
     char *retMsg;
 
     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 sysfs_emit(buf, 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 struct aiptek_map stylus_button_map[] = {
     { "upper",  AIPTEK_STYLUS_UPPER_BUTTON },
     { "lower",  AIPTEK_STYLUS_LOWER_BUTTON },
     { NULL,     AIPTEK_INVALID_VALUE }
 };
 
 static ssize_t show_tabletStylusUpper(struct device *dev, struct device_attribute *attr, char *buf)
 {
     struct aiptek *aiptek = dev_get_drvdata(dev);
 
     return sysfs_emit(buf, "%s\n", map_val_to_str(stylus_button_map,
                               aiptek->curSetting.stylusButtonUpper));
 }
 
 static ssize_t
 store_tabletStylusUpper(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
 {
     struct aiptek *aiptek = dev_get_drvdata(dev);
     int new_button = map_str_to_val(stylus_button_map, buf, count);
 
     if (new_button == AIPTEK_INVALID_VALUE)
         return -EINVAL;
 
     aiptek->newSetting.stylusButtonUpper = new_button;
     return count;
 }
 
 static DEVICE_ATTR(stylus_upper,
            S_IRUGO | S_IWUSR,
            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, struct device_attribute *attr, char *buf)
 {
     struct aiptek *aiptek = dev_get_drvdata(dev);
 
     return sysfs_emit(buf, "%s\n", map_val_to_str(stylus_button_map,
                               aiptek->curSetting.stylusButtonLower));
 }
 
 static ssize_t
 store_tabletStylusLower(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
 {
     struct aiptek *aiptek = dev_get_drvdata(dev);
     int new_button = map_str_to_val(stylus_button_map, buf, count);
 
     if (new_button == AIPTEK_INVALID_VALUE)
         return -EINVAL;
 
     aiptek->newSetting.stylusButtonLower = new_button;
     return count;
 }
 
 static DEVICE_ATTR(stylus_lower,
            S_IRUGO | S_IWUSR,
            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 struct aiptek_map mouse_button_map[] = {
     { "left",   AIPTEK_MOUSE_LEFT_BUTTON },
     { "middle", AIPTEK_MOUSE_MIDDLE_BUTTON },
     { "right",  AIPTEK_MOUSE_RIGHT_BUTTON },
     { NULL,     AIPTEK_INVALID_VALUE }
 };
 
 static ssize_t show_tabletMouseLeft(struct device *dev, struct device_attribute *attr, char *buf)
 {
     struct aiptek *aiptek = dev_get_drvdata(dev);
 
     return sysfs_emit(buf, "%s\n", map_val_to_str(mouse_button_map,
                               aiptek->curSetting.mouseButtonLeft));
 }
 
 static ssize_t
 store_tabletMouseLeft(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
 {
     struct aiptek *aiptek = dev_get_drvdata(dev);
     int new_button = map_str_to_val(mouse_button_map, buf, count);
 
     if (new_button == AIPTEK_INVALID_VALUE)
         return -EINVAL;
 
     aiptek->newSetting.mouseButtonLeft = new_button;
     return count;
 }
 
 static DEVICE_ATTR(mouse_left,
            S_IRUGO | S_IWUSR,
            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, struct device_attribute *attr, char *buf)
 {
     struct aiptek *aiptek = dev_get_drvdata(dev);
 
     return sysfs_emit(buf, "%s\n", map_val_to_str(mouse_button_map,
                               aiptek->curSetting.mouseButtonMiddle));
 }
 
 static ssize_t
 store_tabletMouseMiddle(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
 {
     struct aiptek *aiptek = dev_get_drvdata(dev);
     int new_button = map_str_to_val(mouse_button_map, buf, count);
 
     if (new_button == AIPTEK_INVALID_VALUE)
         return -EINVAL;
 
     aiptek->newSetting.mouseButtonMiddle = new_button;
     return count;
 }
 
 static DEVICE_ATTR(mouse_middle,
            S_IRUGO | S_IWUSR,
            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, struct device_attribute *attr, char *buf)
 {
     struct aiptek *aiptek = dev_get_drvdata(dev);
 
     return sysfs_emit(buf, "%s\n", map_val_to_str(mouse_button_map,
                               aiptek->curSetting.mouseButtonRight));
 }
 
 static ssize_t
 store_tabletMouseRight(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
 {
     struct aiptek *aiptek = dev_get_drvdata(dev);
     int new_button = map_str_to_val(mouse_button_map, buf, count);
 
     if (new_button == AIPTEK_INVALID_VALUE)
         return -EINVAL;
 
     aiptek->newSetting.mouseButtonRight = new_button;
     return count;
 }
 
 static DEVICE_ATTR(mouse_right,
            S_IRUGO | S_IWUSR,
            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, struct device_attribute *attr, char *buf)
 {
     struct aiptek *aiptek = dev_get_drvdata(dev);
 
     if (aiptek->curSetting.wheel == AIPTEK_WHEEL_DISABLE) {
         return sysfs_emit(buf, "disable\n");
     } else {
         return sysfs_emit(buf, "%d\n", aiptek->curSetting.wheel);
     }
 }
 
 static ssize_t
 store_tabletWheel(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
 {
     struct aiptek *aiptek = dev_get_drvdata(dev);
     int err, w;
 
     err = kstrtoint(buf, 10, &w);
     if (err)
         return err;
 
     aiptek->newSetting.wheel = w;
     return count;
 }
 
 static DEVICE_ATTR(wheel,
            S_IRUGO | S_IWUSR, 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, struct device_attribute *attr, char *buf)
 {
     /* There is nothing useful to display, so a one-line manual
      * is in order...
      */
     return sysfs_emit(buf, "Write anything to this file to program your tablet.\n");
 }
 
 static ssize_t
 store_tabletExecute(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
 {
     struct aiptek *aiptek = dev_get_drvdata(dev);
 
     /* 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_IWUSR, 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, struct device_attribute *attr, char *buf)
 {
     struct aiptek *aiptek = dev_get_drvdata(dev);
 
     return sysfs_emit(buf, "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, struct device_attribute *attr, char *buf)
 {
     struct aiptek *aiptek = dev_get_drvdata(dev);
 
     return sysfs_emit(buf, "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, struct device_attribute *attr, char *buf)
 {
     struct aiptek *aiptek = dev_get_drvdata(dev);
 
     return sysfs_emit(buf, "%04x\n", aiptek->features.firmwareCode);
 }
 
 static DEVICE_ATTR(firmware_code, S_IRUGO, show_firmwareCode, NULL);
 
 static struct attribute *aiptek_attributes[] = {
     &dev_attr_size.attr,
     &dev_attr_pointer_mode.attr,
     &dev_attr_coordinate_mode.attr,
     &dev_attr_tool_mode.attr,
     &dev_attr_xtilt.attr,
     &dev_attr_ytilt.attr,
     &dev_attr_jitter.attr,
     &dev_attr_delay.attr,
     &dev_attr_event_count.attr,
     &dev_attr_diagnostic.attr,
     &dev_attr_odm_code.attr,
     &dev_attr_model_code.attr,
     &dev_attr_firmware_code.attr,
     &dev_attr_stylus_lower.attr,
     &dev_attr_stylus_upper.attr,
     &dev_attr_mouse_left.attr,
     &dev_attr_mouse_middle.attr,
     &dev_attr_mouse_right.attr,
     &dev_attr_wheel.attr,
     &dev_attr_execute.attr,
     NULL
 };
 
 static const struct attribute_group aiptek_attribute_group = {
     .attrs  = aiptek_attributes,
 };
 
 /***********************************************************************
  * 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;
     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
     };
     int err = -ENOMEM;
 
     /* 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;
 
     aiptek = kzalloc(sizeof(struct aiptek), GFP_KERNEL);
     inputdev = input_allocate_device();
     if (!aiptek || !inputdev) {
         dev_warn(&intf->dev,
              "cannot allocate memory or input device\n");
         goto fail1;
         }
 
     aiptek->data = usb_alloc_coherent(usbdev, AIPTEK_PACKET_LENGTH,
                       GFP_KERNEL, &aiptek->data_dma);
         if (!aiptek->data) {
         dev_warn(&intf->dev, "cannot allocate usb buffer\n");
         goto fail1;
     }
 
     aiptek->urb = usb_alloc_urb(0, GFP_KERNEL);
     if (!aiptek->urb) {
             dev_warn(&intf->dev, "cannot allocate urb\n");
         goto fail2;
     }
 
     aiptek->inputdev = inputdev;
     aiptek->intf = intf;
     aiptek->ifnum = intf->cur_altsetting->desc.bInterfaceNumber;
     aiptek->inDelay = 0;
     aiptek->endDelay = 0;
     aiptek->previousJitterable = 0;
     aiptek->lastMacro = -1;
 
     /* 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
      */
     aiptek->newSetting = aiptek->curSetting;
 
     /* 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...
      */
     usb_make_path(usbdev, aiptek->features.usbPath,
             sizeof(aiptek->features.usbPath));
     strlcat(aiptek->features.usbPath, "/input0",
         sizeof(aiptek->features.usbPath));
 
     /* Set up client data, pointers to open and close routines
      * for the input device.
      */
     inputdev->name = "Aiptek";
     inputdev->phys = aiptek->features.usbPath;
     usb_to_input_id(usbdev, &inputdev->id);
     inputdev->dev.parent = &intf->dev;
 
     input_set_drvdata(inputdev, aiptek);
 
     inputdev->open = aiptek_open;
     inputdev->close = aiptek_close;
 
     /* Now program the capacities of the tablet, in terms of being
      * an input device.
      */
     for (i = 0; i < ARRAY_SIZE(eventTypes); ++i)
             __set_bit(eventTypes[i], inputdev->evbit);
 
     for (i = 0; i < ARRAY_SIZE(absEvents); ++i)
             __set_bit(absEvents[i], inputdev->absbit);
 
     for (i = 0; i < ARRAY_SIZE(relEvents); ++i)
             __set_bit(relEvents[i], inputdev->relbit);
 
     __set_bit(MSC_SERIAL, inputdev->mscbit);
 
     /* Set up key and button codes */
     for (i = 0; i < ARRAY_SIZE(buttonEvents); ++i)
         __set_bit(buttonEvents[i], inputdev->keybit);
 
     for (i = 0; i < ARRAY_SIZE(macroKeyEvents); ++i)
         __set_bit(macroKeyEvents[i], inputdev->keybit);
 
     /*
      * 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.
      */
     input_set_abs_params(inputdev, ABS_X, 0, 2999, 0, 0);
     input_set_abs_params(inputdev, ABS_Y, 0, 2249, 0, 0);
     input_set_abs_params(inputdev, ABS_PRESSURE, 0, 511, 0, 0);
     input_set_abs_params(inputdev, ABS_TILT_X, AIPTEK_TILT_MIN, AIPTEK_TILT_MAX, 0, 0);
     input_set_abs_params(inputdev, ABS_TILT_Y, AIPTEK_TILT_MIN, AIPTEK_TILT_MAX, 0, 0);
     input_set_abs_params(inputdev, ABS_WHEEL, AIPTEK_WHEEL_MIN, AIPTEK_WHEEL_MAX - 1, 0, 0);
 
     err = usb_find_common_endpoints(intf->cur_altsetting,
                     NULL, NULL, &endpoint, NULL);
     if (err) {
         dev_err(&intf->dev,
             "interface has no int in endpoints, but must have minimum 1\n");
         goto fail3;
     }
 
     /* Go set up our URB, which is called when the tablet receives
      * input.
      */
     usb_fill_int_urb(aiptek->urb,
              usbdev,
              usb_rcvintpipe(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;
 
     /* 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 < ARRAY_SIZE(speeds); ++i) {
         aiptek->curSetting.programmableDelay = speeds[i];
         (void)aiptek_program_tablet(aiptek);
         if (input_abs_get_max(aiptek->inputdev, ABS_X) > 0) {
             dev_info(&intf->dev,
                  "Aiptek using %d ms programming speed\n",
                  aiptek->curSetting.programmableDelay);
             break;
         }
     }
 
     /* Murphy says that some day someone will have a tablet that fails the
        above test. That's you, Frederic Rodrigo */
     if (i == ARRAY_SIZE(speeds)) {
         dev_info(&intf->dev,
              "Aiptek tried all speeds, no sane response\n");
         err = -EINVAL;
         goto fail3;
     }
 
     /* Associate this driver's struct with the usb interface.
      */
     usb_set_intfdata(intf, aiptek);
 
     /* Set up the sysfs files
      */
     err = sysfs_create_group(&intf->dev.kobj, &aiptek_attribute_group);
     if (err) {
         dev_warn(&intf->dev, "cannot create sysfs group err: %d\n",
              err);
         goto fail3;
         }
 
     /* Register the tablet as an Input Device
      */
     err = input_register_device(aiptek->inputdev);
     if (err) {
         dev_warn(&intf->dev,
              "input_register_device returned err: %d\n", err);
         goto fail4;
         }
     return 0;
 
  fail4: sysfs_remove_group(&intf->dev.kobj, &aiptek_attribute_group);
  fail3: usb_free_urb(aiptek->urb);
  fail2: usb_free_coherent(usbdev, AIPTEK_PACKET_LENGTH, aiptek->data,
               aiptek->data_dma);
  fail1: usb_set_intfdata(intf, NULL);
     input_free_device(inputdev);
     kfree(aiptek);
     return err;
 }
 
 /***********************************************************************
  * 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);
         sysfs_remove_group(&intf->dev.kobj, &aiptek_attribute_group);
         usb_free_urb(aiptek->urb);
         usb_free_coherent(interface_to_usbdev(intf),
                   AIPTEK_PACKET_LENGTH,
                   aiptek->data, aiptek->data_dma);
         kfree(aiptek);
     }
 }
 
 static struct usb_driver aiptek_driver = {
     .name = "aiptek",
     .probe = aiptek_probe,
     .disconnect = aiptek_disconnect,
     .id_table = aiptek_ids,
 };
 
 module_usb_driver(aiptek_driver);
 
 MODULE_AUTHOR("Bryan W. Headley/Chris Atenasio/Cedric Brun/Rene van Paassen");
 MODULE_DESCRIPTION("Aiptek HyperPen USB Tablet Driver");
 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");

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