drivers/usb/input/aiptek.c

   1 /*
   2  *  Native support for the Aiptek HyperPen USB Tablets
   3  *  (4000U/5000U/6000U/8000U/12000U)
   4  *
   5  *  Copyright (c) 2001      Chris Atenasio   <chris@crud.net>
   6  *  Copyright (c) 2002-2004 Bryan W. Headley <bwheadley@earthlink.net>
   7  *
   8  *  based on wacom.c by
   9  *     Vojtech Pavlik      <vojtech@suse.cz>
  10  *     Andreas Bach Aaen   <abach@stofanet.dk>
  11  *     Clifford Wolf       <clifford@clifford.at>
  12  *     Sam Mosel           <sam.mosel@computer.org>
  13  *     James E. Blair      <corvus@gnu.org>
  14  *     Daniel Egger        <egger@suse.de>
  15  *
  16  *  Many thanks to Oliver Kuechemann for his support.
  17  *
  18  *  ChangeLog:
  19  *      v0.1 - Initial release
  20  *      v0.2 - Hack to get around fake event 28's. (Bryan W. Headley)
  21  *      v0.3 - Make URB dynamic (Bryan W. Headley, Jun-8-2002)
  22  *             Released to Linux 2.4.19 and 2.5.x
  23  *      v0.4 - Rewrote substantial portions of the code to deal with
  24  *             corrected control sequences, timing, dynamic configuration,
  25  *             support of 6000U - 12000U, procfs, and macro key support
  26  *             (Jan-1-2003 - Feb-5-2003, Bryan W. Headley)
  27  *      v1.0 - Added support for diagnostic messages, count of messages
  28  *             received from URB - Mar-8-2003, Bryan W. Headley
  29  *      v1.1 - added support for tablet resolution, changed DV and proximity
  30  *             some corrections - Jun-22-2003, martin schneebacher
  31  *           - Added support for the sysfs interface, deprecating the
  32  *             procfs interface for 2.5.x kernel. Also added support for
  33  *             Wheel command. Bryan W. Headley July-15-2003.
  34  *      v1.2 - Reworked jitter timer as a kernel thread.
  35  *             Bryan W. Headley November-28-2003/Jan-10-2004.
  36  *      v1.3 - Repaired issue of kernel thread going nuts on single-processor
  37  *             machines, introduced programmableDelay as a command line
  38  *             parameter. Feb 7 2004, Bryan W. Headley.
  39  *      v1.4 - Re-wire jitter so it does not require a thread. Courtesy of
  40  *             Rene van Paassen. Added reporting of physical pointer device
  41  *             (e.g., stylus, mouse in reports 2, 3, 4, 5. We don't know
  42  *             for reports 1, 6.)
  43  *             what physical device reports for reports 1, 6.) Also enabled
  44  *             MOUSE and LENS tool button modes. Renamed "rubber" to "eraser".
  45  *             Feb 20, 2004, Bryan W. Headley.
  46  *      v1.5 - Added previousJitterable, so we don't do jitter delay when the
  47  *             user is holding a button down for periods of time.
  48  *
  49  * NOTE:
  50  *      This kernel driver is augmented by the "Aiptek" XFree86 input
  51  *      driver for your X server, as well as the Gaiptek GUI Front-end
  52  *      "Tablet Manager".
  53  *      These three products are highly interactive with one another,
  54  *      so therefore it's easier to document them all as one subsystem.
  55  *      Please visit the project's "home page", located at,
  56  *      http://aiptektablet.sourceforge.net.
  57  *
  58  * This program is free software; you can redistribute it and/or modify
  59  * it under the terms of the GNU General Public License as published by
  60  * the Free Software Foundation; either version 2 of the License, or
  61  * (at your option) any later version.
  62  *
  63  * This program is distributed in the hope that it will be useful,
  64  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  65  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  66  * GNU General Public License for more details.
  67  *
  68  * You should have received a copy of the GNU General Public License
  69  * along with this program; if not, write to the Free Software
  70  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  71  */
  72
  73 #include <linux/jiffies.h>
  74 #include <linux/kernel.h>
  75 #include <linux/slab.h>
  76 #include <linux/module.h>
  77 #include <linux/init.h>
  78 #include <linux/usb/input.h>
  79 #include <linux/sched.h>
  80 #include <asm/uaccess.h>
  81 #include <asm/unaligned.h>
  82
  83 /*
  84  * Version Information
  85  */
  86 #define DRIVER_VERSION "v1.5 (May-15-2004)"
  87 #define DRIVER_AUTHOR  "Bryan W. Headley/Chris Atenasio"
  88 #define DRIVER_DESC    "Aiptek HyperPen USB Tablet Driver (Linux 2.6.x)"
  89
  90 /*
  91  * Aiptek status packet:
  92  *
  93  * (returned as Report 1 - relative coordinates from mouse and stylus)
  94  *
  95  *        bit7  bit6  bit5  bit4  bit3  bit2  bit1  bit0
  96  * byte0   0     0     0     0     0     0     0     1
  97  * byte1   0     0     0     0     0    BS2   BS    Tip
  98  * byte2  X7    X6    X5    X4    X3    X2    X1    X0
  99  * byte3  Y7    Y6    Y5    Y4    Y3    Y2    Y1    Y0
 100  *
 101  * (returned as Report 2 - absolute coordinates from the stylus)
 102  *
 103  *        bit7  bit6  bit5  bit4  bit3  bit2  bit1  bit0
 104  * byte0   0     0     0     0     0     0     1     0
 105  * byte1  X7    X6    X5    X4    X3    X2    X1    X0
 106  * byte2  X15   X14   X13   X12   X11   X10   X9    X8
 107  * byte3  Y7    Y6    Y5    Y4    Y3    Y2    Y1    Y0
 108  * byte4  Y15   Y14   Y13   Y12   Y11   Y10   Y9    Y8
 109  * byte5   *     *     *    BS2   BS1   Tip   IR    DV
 110  * byte6  P7    P6    P5    P4    P3    P2    P1    P0
 111  * byte7  P15   P14   P13   P12   P11   P10   P9    P8
 112  *
 113  * (returned as Report 3 - absolute coordinates from the mouse)
 114  *
 115  *        bit7  bit6  bit5  bit4  bit3  bit2  bit1  bit0
 116  * byte0   0     0     0     0     0     0     1     0
 117  * byte1  X7    X6    X5    X4    X3    X2    X1    X0
 118  * byte2  X15   X14   X13   X12   X11   X10   X9    X8
 119  * byte3  Y7    Y6    Y5    Y4    Y3    Y2    Y1    Y0
 120  * byte4  Y15   Y14   Y13   Y12   Y11   Y10   Y9    Y8
 121  * byte5   *     *     *    BS2   BS1   Tip   IR    DV
 122  * byte6  P7    P6    P5    P4    P3    P2    P1    P0
 123  * byte7  P15   P14   P13   P12   P11   P10   P9    P8
 124  *
 125  * (returned as Report 4 - macrokeys from the stylus)
 126  *
 127  *        bit7  bit6  bit5  bit4  bit3  bit2  bit1  bit0
 128  * byte0   0     0     0     0     0     1     0     0
 129  * byte1   0     0     0    BS2   BS    Tip   IR    DV
 130  * byte2   0     0     0     0     0     0     1     0
 131  * byte3   0     0     0    K4    K3    K2    K1    K0
 132  * byte4  P7    P6    P5    P4    P3    P2    P1    P0
 133  * byte5  P15   P14   P13   P12   P11   P10   P9    P8
 134  *
 135  * (returned as Report 5 - macrokeys from the mouse)
 136  *
 137  *        bit7  bit6  bit5  bit4  bit3  bit2  bit1  bit0
 138  * byte0   0     0     0     0     0     1     0     0
 139  * byte1   0     0     0    BS2   BS    Tip   IR    DV
 140  * byte2   0     0     0     0     0     0     1     0
 141  * byte3   0     0     0    K4    K3    K2    K1    K0
 142  * byte4  P7    P6    P5    P4    P3    P2    P1    P0
 143  * byte5  P15   P14   P13   P12   P11   P10   P9    P8
 144  *
 145  * IR: In Range = Proximity on
 146  * DV = Data Valid
 147  * BS = Barrel Switch (as in, macro keys)
 148  * BS2 also referred to as Tablet Pick
 149  *
 150  * Command Summary:
 151  *
 152  * Use report_type CONTROL (3)
 153  * Use report_id   2
 154  *
 155  * Command/Data    Description     Return Bytes    Return Value
 156  * 0x10/0x00       SwitchToMouse       0
 157  * 0x10/0x01       SwitchToTablet      0
 158  * 0x18/0x04       SetResolution       0
 159  * 0x12/0xFF       AutoGainOn          0
 160  * 0x17/0x00       FilterOn            0
 161  * 0x01/0x00       GetXExtension       2           MaxX
 162  * 0x01/0x01       GetYExtension       2           MaxY
 163  * 0x02/0x00       GetModelCode        2           ModelCode = LOBYTE
 164  * 0x03/0x00       GetODMCode          2           ODMCode
 165  * 0x08/0x00       GetPressureLevels   2           =512
 166  * 0x04/0x00       GetFirmwareVersion  2           Firmware Version
 167  * 0x11/0x02       EnableMacroKeys     0
 168  *
 169  * To initialize the tablet:
 170  *
 171  * (1) Send Resolution500LPI (Command)
 172  * (2) Query for Model code (Option Report)
 173  * (3) Query for ODM code (Option Report)
 174  * (4) Query for firmware (Option Report)
 175  * (5) Query for GetXExtension (Option Report)
 176  * (6) Query for GetYExtension (Option Report)
 177  * (7) Query for GetPressureLevels (Option Report)
 178  * (8) SwitchToTablet for Absolute coordinates, or
 179  *     SwitchToMouse for Relative coordinates (Command)
 180  * (9) EnableMacroKeys (Command)
 181  * (10) FilterOn (Command)
 182  * (11) AutoGainOn (Command)
 183  *
 184  * (Step 9 can be omitted, but you'll then have no function keys.)
 185  */
 186
 187 #define USB_VENDOR_ID_AIPTEK                            0x08ca
 188 #define USB_REQ_GET_REPORT                              0x01
 189 #define USB_REQ_SET_REPORT                              0x09
 190
 191         /* PointerMode codes
 192          */
 193 #define AIPTEK_POINTER_ONLY_MOUSE_MODE                  0
 194 #define AIPTEK_POINTER_ONLY_STYLUS_MODE                 1
 195 #define AIPTEK_POINTER_EITHER_MODE                      2
 196
 197 #define AIPTEK_POINTER_ALLOW_MOUSE_MODE(a)              \
 198         (a == AIPTEK_POINTER_ONLY_MOUSE_MODE ||         \
 199          a == AIPTEK_POINTER_EITHER_MODE)
 200 #define AIPTEK_POINTER_ALLOW_STYLUS_MODE(a)             \
 201         (a == AIPTEK_POINTER_ONLY_STYLUS_MODE ||        \
 202          a == AIPTEK_POINTER_EITHER_MODE)
 203
 204         /* CoordinateMode code
 205          */
 206 #define AIPTEK_COORDINATE_RELATIVE_MODE                 0
 207 #define AIPTEK_COORDINATE_ABSOLUTE_MODE                 1
 208
 209        /* XTilt and YTilt values
 210         */
 211 #define AIPTEK_TILT_MIN                                 (-128)
 212 #define AIPTEK_TILT_MAX                                 127
 213 #define AIPTEK_TILT_DISABLE                             (-10101)
 214
 215         /* Wheel values
 216          */
 217 #define AIPTEK_WHEEL_MIN                                0
 218 #define AIPTEK_WHEEL_MAX                                1024
 219 #define AIPTEK_WHEEL_DISABLE                            (-10101)
 220
 221         /* ToolCode values, which BTW are 0x140 .. 0x14f
 222          * We have things set up such that if TOOL_BUTTON_FIRED_BIT is
 223          * not set, we'll send one instance of AIPTEK_TOOL_BUTTON_xxx.
 224          *
 225          * Whenever the user resets the value, TOOL_BUTTON_FIRED_BIT will
 226          * get reset.
 227          */
 228 #define TOOL_BUTTON(x)                                  ((x) & 0x14f)
 229 #define TOOL_BUTTON_FIRED(x)                            ((x) & 0x200)
 230 #define TOOL_BUTTON_FIRED_BIT                           0x200
 231         /* toolMode codes
 232          */
 233 #define AIPTEK_TOOL_BUTTON_PEN_MODE                     BTN_TOOL_PEN
 234 #define AIPTEK_TOOL_BUTTON_PEN_MODE                     BTN_TOOL_PEN
 235 #define AIPTEK_TOOL_BUTTON_PENCIL_MODE                  BTN_TOOL_PENCIL
 236 #define AIPTEK_TOOL_BUTTON_BRUSH_MODE                   BTN_TOOL_BRUSH
 237 #define AIPTEK_TOOL_BUTTON_AIRBRUSH_MODE                BTN_TOOL_AIRBRUSH
 238 #define AIPTEK_TOOL_BUTTON_ERASER_MODE                  BTN_TOOL_RUBBER
 239 #define AIPTEK_TOOL_BUTTON_MOUSE_MODE                   BTN_TOOL_MOUSE
 240 #define AIPTEK_TOOL_BUTTON_LENS_MODE                    BTN_TOOL_LENS
 241
 242         /* Diagnostic message codes
 243          */
 244 #define AIPTEK_DIAGNOSTIC_NA                            0
 245 #define AIPTEK_DIAGNOSTIC_SENDING_RELATIVE_IN_ABSOLUTE  1
 246 #define AIPTEK_DIAGNOSTIC_SENDING_ABSOLUTE_IN_RELATIVE  2
 247 #define AIPTEK_DIAGNOSTIC_TOOL_DISALLOWED               3
 248
 249         /* Time to wait (in ms) to help mask hand jittering
 250          * when pressing the stylus buttons.
 251          */
 252 #define AIPTEK_JITTER_DELAY_DEFAULT                     50
 253
 254         /* Time to wait (in ms) in-between sending the tablet
 255          * a command and beginning the process of reading the return
 256          * sequence from the tablet.
 257          */
 258 #define AIPTEK_PROGRAMMABLE_DELAY_25            25
 259 #define AIPTEK_PROGRAMMABLE_DELAY_50            50
 260 #define AIPTEK_PROGRAMMABLE_DELAY_100           100
 261 #define AIPTEK_PROGRAMMABLE_DELAY_200           200
 262 #define AIPTEK_PROGRAMMABLE_DELAY_300           300
 263 #define AIPTEK_PROGRAMMABLE_DELAY_400           400
 264 #define AIPTEK_PROGRAMMABLE_DELAY_DEFAULT       AIPTEK_PROGRAMMABLE_DELAY_400
 265
 266         /* Mouse button programming
 267          */
 268 #define AIPTEK_MOUSE_LEFT_BUTTON                0x01
 269 #define AIPTEK_MOUSE_RIGHT_BUTTON               0x02
 270 #define AIPTEK_MOUSE_MIDDLE_BUTTON              0x04
 271
 272         /* Stylus button programming
 273          */
 274 #define AIPTEK_STYLUS_LOWER_BUTTON              0x08
 275 #define AIPTEK_STYLUS_UPPER_BUTTON              0x10
 276
 277         /* Length of incoming packet from the tablet
 278          */
 279 #define AIPTEK_PACKET_LENGTH                    8
 280
 281         /* We report in EV_MISC both the proximity and
 282          * whether the report came from the stylus, tablet mouse
 283          * or "unknown" -- Unknown when the tablet is in relative
 284          * mode, because we only get report 1's.
 285          */
 286 #define AIPTEK_REPORT_TOOL_UNKNOWN              0x10
 287 #define AIPTEK_REPORT_TOOL_STYLUS               0x20
 288 #define AIPTEK_REPORT_TOOL_MOUSE                0x40
 289
 290 static int programmableDelay = AIPTEK_PROGRAMMABLE_DELAY_DEFAULT;
 291 static int jitterDelay = AIPTEK_JITTER_DELAY_DEFAULT;
 292
 293 struct aiptek_features {
 294         int odmCode;            /* Tablet manufacturer code       */
 295         int modelCode;          /* Tablet model code (not unique) */
 296         int firmwareCode;       /* prom/eeprom version            */
 297         char usbPath[64 + 1];   /* device's physical usb path     */
 298         char inputPath[64 + 1]; /* input device path              */
 299 };
 300
 301 struct aiptek_settings {
 302         int pointerMode;        /* stylus-, mouse-only or either */
 303         int coordinateMode;     /* absolute/relative coords      */
 304         int toolMode;           /* pen, pencil, brush, etc. tool */
 305         int xTilt;              /* synthetic xTilt amount        */
 306         int yTilt;              /* synthetic yTilt amount        */
 307         int wheel;              /* synthetic wheel amount        */
 308         int stylusButtonUpper;  /* stylus upper btn delivers...  */
 309         int stylusButtonLower;  /* stylus lower btn delivers...  */
 310         int mouseButtonLeft;    /* mouse left btn delivers...    */
 311         int mouseButtonMiddle;  /* mouse middle btn delivers...  */
 312         int mouseButtonRight;   /* mouse right btn delivers...   */
 313         int programmableDelay;  /* delay for tablet programming  */
 314         int jitterDelay;        /* delay for hand jittering      */
 315 };
 316
 317 struct aiptek {
 318         struct input_dev *inputdev;             /* input device struct           */
 319         struct usb_device *usbdev;              /* usb device struct             */
 320         struct urb *urb;                        /* urb for incoming reports      */
 321         dma_addr_t data_dma;                    /* our dma stuffage              */
 322         struct aiptek_features features;        /* tablet's array of features    */
 323         struct aiptek_settings curSetting;      /* tablet's current programmable */
 324         struct aiptek_settings newSetting;      /* ... and new param settings    */
 325         unsigned int ifnum;                     /* interface number for IO       */
 326         int diagnostic;                         /* tablet diagnostic codes       */
 327         unsigned long eventCount;               /* event count                   */
 328         int inDelay;                            /* jitter: in jitter delay?      */
 329         unsigned long endDelay;                 /* jitter: time when delay ends  */
 330         int previousJitterable;                 /* jitterable prev value     */
 331         unsigned char *data;                    /* incoming packet data          */
 332 };
 333
 334 /*
 335  * Permit easy lookup of keyboard events to send, versus
 336  * the bitmap which comes from the tablet. This hides the
 337  * issue that the F_keys are not sequentially numbered.
 338  */
 339 static const int macroKeyEvents[] = {
 340         KEY_ESC, KEY_F1, KEY_F2, KEY_F3, KEY_F4, KEY_F5,
 341         KEY_F6, KEY_F7, KEY_F8, KEY_F9, KEY_F10, KEY_F11,
 342         KEY_F12, KEY_F13, KEY_F14, KEY_F15, KEY_F16, KEY_F17,
 343         KEY_F18, KEY_F19, KEY_F20, KEY_F21, KEY_F22, KEY_F23,
 344         KEY_F24, KEY_STOP, KEY_AGAIN, KEY_PROPS, KEY_UNDO,
 345         KEY_FRONT, KEY_COPY, KEY_OPEN, KEY_PASTE, 0
 346 };
 347
 348 /***********************************************************************
 349  * Relative reports deliver values in 2's complement format to
 350  * deal with negative offsets.
 351  */
 352 static int aiptek_convert_from_2s_complement(unsigned char c)
 353 {
 354         int ret;
 355         unsigned char b = c;
 356         int negate = 0;
 357
 358         if ((b & 0x80) != 0) {
 359                 b = ~b;
 360                 b--;
 361                 negate = 1;
 362         }
 363         ret = b;
 364         ret = (negate == 1) ? -ret : ret;
 365         return ret;
 366 }
 367
 368 /***********************************************************************
 369  * aiptek_irq can receive one of six potential reports.
 370  * The documentation for each is in the body of the function.
 371  *
 372  * The tablet reports on several attributes per invocation of
 373  * aiptek_irq. Because the Linux Input Event system allows the
 374  * transmission of ONE attribute per input_report_xxx() call,
 375  * collation has to be done on the other end to reconstitute
 376  * a complete tablet report. Further, the number of Input Event reports
 377  * submitted varies, depending on what USB report type, and circumstance.
 378  * To deal with this, EV_MSC is used to indicate an 'end-of-report'
 379  * message. This has been an undocumented convention understood by the kernel
 380  * tablet driver and clients such as gpm and XFree86's tablet drivers.
 381  *
 382  * Of the information received from the tablet, the one piece I
 383  * cannot transmit is the proximity bit (without resorting to an EV_MSC
 384  * convention above.) I therefore have taken over REL_MISC and ABS_MISC
 385  * (for relative and absolute reports, respectively) for communicating
 386  * Proximity. Why two events? I thought it interesting to know if the
 387  * Proximity event occurred while the tablet was in absolute or relative
 388  * mode.
 389  *
 390  * Other tablets use the notion of a certain minimum stylus pressure
 391  * to infer proximity. While that could have been done, that is yet
 392  * another 'by convention' behavior, the documentation for which
 393  * would be spread between two (or more) pieces of software.
 394  *
 395  * EV_MSC usage was terminated for this purpose in Linux 2.5.x, and
 396  * replaced with the input_sync() method (which emits EV_SYN.)
 397  */
 398
 399 static void aiptek_irq(struct urb *urb)
 400 {
 401         struct aiptek *aiptek = urb->context;
 402         unsigned char *data = aiptek->data;
 403         struct input_dev *inputdev = aiptek->inputdev;
 404         int jitterable = 0;
 405         int retval, macro, x, y, z, left, right, middle, p, dv, tip, bs, pck;
 406
 407         switch (urb->status) {
 408         case 0:
 409                 /* Success */
 410                 break;
 411
 412         case -ECONNRESET:
 413         case -ENOENT:
 414         case -ESHUTDOWN:
 415                 /* This urb is terminated, clean up */
 416                 dbg("%s - urb shutting down with status: %d",
 417                     __FUNCTION__, urb->status);
 418                 return;
 419
 420         default:
 421                 dbg("%s - nonzero urb status received: %d",
 422                     __FUNCTION__, urb->status);
 423                 goto exit;
 424         }
 425
 426         /* See if we are in a delay loop -- throw out report if true.
 427          */
 428         if (aiptek->inDelay == 1 && time_after(aiptek->endDelay, jiffies)) {
 429                 goto exit;
 430         }
 431
 432         aiptek->inDelay = 0;
 433         aiptek->eventCount++;
 434
 435         /* Report 1 delivers relative coordinates with either a stylus
 436          * or the mouse. You do not know, however, which input
 437          * tool generated the event.
 438          */
 439         if (data[0] == 1) {
 440                 if (aiptek->curSetting.coordinateMode ==
 441                     AIPTEK_COORDINATE_ABSOLUTE_MODE) {
 442                         aiptek->diagnostic =
 443                             AIPTEK_DIAGNOSTIC_SENDING_RELATIVE_IN_ABSOLUTE;
 444                 } else {
 445                         x = aiptek_convert_from_2s_complement(data[2]);
 446                         y = aiptek_convert_from_2s_complement(data[3]);
 447
 448                         /* jitterable keeps track of whether any button has been pressed.
 449                          * We're also using it to remap the physical mouse button mask
 450                          * to pseudo-settings. (We don't specifically care about it's
 451                          * value after moving/transposing mouse button bitmasks, except
 452                          * that a non-zero value indicates that one or more
 453                          * mouse button was pressed.)
 454                          */
 455                         jitterable = data[5] & 0x07;
 456
 457                         left = (data[5] & aiptek->curSetting.mouseButtonLeft) != 0 ? 1 : 0;
 458                         right = (data[5] & aiptek->curSetting.mouseButtonRight) != 0 ? 1 : 0;
 459                         middle = (data[5] & aiptek->curSetting.mouseButtonMiddle) != 0 ? 1 : 0;
 460
 461                         input_report_key(inputdev, BTN_LEFT, left);
 462                         input_report_key(inputdev, BTN_MIDDLE, middle);
 463                         input_report_key(inputdev, BTN_RIGHT, right);
 464                         input_report_rel(inputdev, REL_X, x);
 465                         input_report_rel(inputdev, REL_Y, y);
 466                         input_report_rel(inputdev, REL_MISC, 1 | AIPTEK_REPORT_TOOL_UNKNOWN);
 467
 468                         /* Wheel support is in the form of a single-event
 469                          * firing.
 470                          */
 471                         if (aiptek->curSetting.wheel != AIPTEK_WHEEL_DISABLE) {
 472                                 input_report_rel(inputdev, REL_WHEEL,
 473                                                  aiptek->curSetting.wheel);
 474                                 aiptek->curSetting.wheel = AIPTEK_WHEEL_DISABLE;
 475                         }
 476                         input_sync(inputdev);
 477                 }
 478         }
 479         /* Report 2 is delivered only by the stylus, and delivers
 480          * absolute coordinates.
 481          */
 482         else if (data[0] == 2) {
 483                 if (aiptek->curSetting.coordinateMode == AIPTEK_COORDINATE_RELATIVE_MODE) {
 484                         aiptek->diagnostic = AIPTEK_DIAGNOSTIC_SENDING_ABSOLUTE_IN_RELATIVE;
 485                 } else if (!AIPTEK_POINTER_ALLOW_STYLUS_MODE
 486                             (aiptek->curSetting.pointerMode)) {
 487                                 aiptek->diagnostic = AIPTEK_DIAGNOSTIC_TOOL_DISALLOWED;
 488                 } else {
 489                         x = le16_to_cpu(get_unaligned((__le16 *) (data + 1)));
 490                         y = le16_to_cpu(get_unaligned((__le16 *) (data + 3)));
 491                         z = le16_to_cpu(get_unaligned((__le16 *) (data + 6)));
 492
 493                         p = (data[5] & 0x01) != 0 ? 1 : 0;
 494                         dv = (data[5] & 0x02) != 0 ? 1 : 0;
 495                         tip = (data[5] & 0x04) != 0 ? 1 : 0;
 496
 497                         /* Use jitterable to re-arrange button masks
 498                          */
 499                         jitterable = data[5] & 0x18;
 500
 501                         bs = (data[5] & aiptek->curSetting.stylusButtonLower) != 0 ? 1 : 0;
 502                         pck = (data[5] & aiptek->curSetting.stylusButtonUpper) != 0 ? 1 : 0;
 503
 504                         /* dv indicates 'data valid' (e.g., the tablet is in sync
 505                          * and has delivered a "correct" report) We will ignore
 506                          * all 'bad' reports...
 507                          */
 508                         if (dv != 0) {
 509                                 /* If we've not already sent a tool_button_?? code, do
 510                                  * so now. Then set FIRED_BIT so it won't be resent unless
 511                                  * the user forces FIRED_BIT off.
 512                                  */
 513                                 if (TOOL_BUTTON_FIRED
 514                                     (aiptek->curSetting.toolMode) == 0) {
 515                                         input_report_key(inputdev,
 516                                                          TOOL_BUTTON(aiptek->curSetting.toolMode),
 517                                                          1);
 518                                         aiptek->curSetting.toolMode |= TOOL_BUTTON_FIRED_BIT;
 519                                 }
 520
 521                                 if (p != 0) {
 522                                         input_report_abs(inputdev, ABS_X, x);
 523                                         input_report_abs(inputdev, ABS_Y, y);
 524                                         input_report_abs(inputdev, ABS_PRESSURE, z);
 525
 526                                         input_report_key(inputdev, BTN_TOUCH, tip);
 527                                         input_report_key(inputdev, BTN_STYLUS, bs);
 528                                         input_report_key(inputdev, BTN_STYLUS2, pck);
 529
 530                                         if (aiptek->curSetting.xTilt !=
 531                                             AIPTEK_TILT_DISABLE) {
 532                                                 input_report_abs(inputdev,
 533                                                                  ABS_TILT_X,
 534                                                                  aiptek->curSetting.xTilt);
 535                                         }
 536                                         if (aiptek->curSetting.yTilt != AIPTEK_TILT_DISABLE) {
 537                                                 input_report_abs(inputdev,
 538                                                                  ABS_TILT_Y,
 539                                                                  aiptek->curSetting.yTilt);
 540                                         }
 541
 542                                         /* Wheel support is in the form of a single-event
 543                                          * firing.
 544                                          */
 545                                         if (aiptek->curSetting.wheel !=
 546                                             AIPTEK_WHEEL_DISABLE) {
 547                                                 input_report_abs(inputdev,
 548                                                                  ABS_WHEEL,
 549                                                                  aiptek->curSetting.wheel);
 550                                                 aiptek->curSetting.wheel = AIPTEK_WHEEL_DISABLE;
 551                                         }
 552                                 }
 553                                 input_report_abs(inputdev, ABS_MISC, p | AIPTEK_REPORT_TOOL_STYLUS);
 554                                 input_sync(inputdev);
 555                         }
 556                 }
 557         }
 558         /* Report 3's come from the mouse in absolute mode.
 559          */
 560         else if (data[0] == 3) {
 561                 if (aiptek->curSetting.coordinateMode == AIPTEK_COORDINATE_RELATIVE_MODE) {
 562                         aiptek->diagnostic = AIPTEK_DIAGNOSTIC_SENDING_ABSOLUTE_IN_RELATIVE;
 563                 } else if (!AIPTEK_POINTER_ALLOW_MOUSE_MODE
 564                         (aiptek->curSetting.pointerMode)) {
 565                         aiptek->diagnostic = AIPTEK_DIAGNOSTIC_TOOL_DISALLOWED;
 566                 } else {
 567                         x = le16_to_cpu(get_unaligned((__le16 *) (data + 1)));
 568                         y = le16_to_cpu(get_unaligned((__le16 *) (data + 3)));
 569
 570                         jitterable = data[5] & 0x1c;
 571
 572                         p = (data[5] & 0x01) != 0 ? 1 : 0;
 573                         dv = (data[5] & 0x02) != 0 ? 1 : 0;
 574                         left = (data[5] & aiptek->curSetting.mouseButtonLeft) != 0 ? 1 : 0;
 575                         right = (data[5] & aiptek->curSetting.mouseButtonRight) != 0 ? 1 : 0;
 576                         middle = (data[5] & aiptek->curSetting.mouseButtonMiddle) != 0 ? 1 : 0;
 577
 578                         if (dv != 0) {
 579                                 /* If we've not already sent a tool_button_?? code, do
 580                                  * so now. Then set FIRED_BIT so it won't be resent unless
 581                                  * the user forces FIRED_BIT off.
 582                                  */
 583                                 if (TOOL_BUTTON_FIRED
 584                                     (aiptek->curSetting.toolMode) == 0) {
 585                                         input_report_key(inputdev,
 586                                                          TOOL_BUTTON(aiptek->curSetting.toolMode),
 587                                                          1);
 588                                         aiptek->curSetting.toolMode |= TOOL_BUTTON_FIRED_BIT;
 589                                 }
 590
 591                                 if (p != 0) {
 592                                         input_report_abs(inputdev, ABS_X, x);
 593                                         input_report_abs(inputdev, ABS_Y, y);
 594
 595                                         input_report_key(inputdev, BTN_LEFT, left);
 596                                         input_report_key(inputdev, BTN_MIDDLE, middle);
 597                                         input_report_key(inputdev, BTN_RIGHT, right);
 598
 599                                         /* Wheel support is in the form of a single-event
 600                                          * firing.
 601                                          */
 602                                         if (aiptek->curSetting.wheel != AIPTEK_WHEEL_DISABLE) {
 603                                                 input_report_abs(inputdev,
 604                                                                  ABS_WHEEL,
 605                                                                  aiptek->curSetting.wheel);
 606                                                 aiptek->curSetting.wheel = AIPTEK_WHEEL_DISABLE;
 607                                         }
 608                                 }
 609                                 input_report_rel(inputdev, REL_MISC, p | AIPTEK_REPORT_TOOL_MOUSE);
 610                                 input_sync(inputdev);
 611                         }
 612                 }
 613         }
 614         /* Report 4s come from the macro keys when pressed by stylus
 615          */
 616         else if (data[0] == 4) {
 617                 jitterable = data[1] & 0x18;
 618
 619                 p = (data[1] & 0x01) != 0 ? 1 : 0;
 620                 dv = (data[1] & 0x02) != 0 ? 1 : 0;
 621                 tip = (data[1] & 0x04) != 0 ? 1 : 0;
 622                 bs = (data[1] & aiptek->curSetting.stylusButtonLower) != 0 ? 1 : 0;
 623                 pck = (data[1] & aiptek->curSetting.stylusButtonUpper) != 0 ? 1 : 0;
 624
 625                 macro = data[3];
 626                 z = le16_to_cpu(get_unaligned((__le16 *) (data + 4)));
 627
 628                 if (dv != 0) {
 629                         /* If we've not already sent a tool_button_?? code, do
 630                          * so now. Then set FIRED_BIT so it won't be resent unless
 631                          * the user forces FIRED_BIT off.
 632                          */
 633                         if (TOOL_BUTTON_FIRED(aiptek->curSetting.toolMode) == 0) {
 634                                 input_report_key(inputdev,
 635                                                  TOOL_BUTTON(aiptek->curSetting.toolMode),
 636                                                  1);
 637                                 aiptek->curSetting.toolMode |= TOOL_BUTTON_FIRED_BIT;
 638                         }
 639
 640                         if (p != 0) {
 641                                 input_report_key(inputdev, BTN_TOUCH, tip);
 642                                 input_report_key(inputdev, BTN_STYLUS, bs);
 643                                 input_report_key(inputdev, BTN_STYLUS2, pck);
 644                                 input_report_abs(inputdev, ABS_PRESSURE, z);
 645                         }
 646
 647                         /* For safety, we're sending key 'break' codes for the
 648                          * neighboring macro keys.
 649                          */
 650                         if (macro > 0) {
 651                                 input_report_key(inputdev,
 652                                                  macroKeyEvents[macro - 1], 0);
 653                         }
 654                         if (macro < 25) {
 655                                 input_report_key(inputdev,
 656                                                  macroKeyEvents[macro + 1], 0);
 657                         }
 658                         input_report_key(inputdev, macroKeyEvents[macro], p);
 659                         input_report_abs(inputdev, ABS_MISC,
 660                                          p | AIPTEK_REPORT_TOOL_STYLUS);
 661                         input_sync(inputdev);
 662                 }
 663         }
 664         /* Report 5s come from the macro keys when pressed by mouse
 665          */
 666         else if (data[0] == 5) {
 667                 jitterable = data[1] & 0x1c;
 668
 669                 p = (data[1] & 0x01) != 0 ? 1 : 0;
 670                 dv = (data[1] & 0x02) != 0 ? 1 : 0;
 671                 left = (data[1]& aiptek->curSetting.mouseButtonLeft) != 0 ? 1 : 0;
 672                 right = (data[1] & aiptek->curSetting.mouseButtonRight) != 0 ? 1 : 0;
 673                 middle = (data[1] & aiptek->curSetting.mouseButtonMiddle) != 0 ? 1 : 0;
 674                 macro = data[3];
 675
 676                 if (dv != 0) {
 677                         /* If we've not already sent a tool_button_?? code, do
 678                          * so now. Then set FIRED_BIT so it won't be resent unless
 679                          * the user forces FIRED_BIT off.
 680                          */
 681                         if (TOOL_BUTTON_FIRED(aiptek->curSetting.toolMode) == 0) {
 682                                 input_report_key(inputdev,
 683                                                  TOOL_BUTTON(aiptek->curSetting.toolMode),
 684                                                  1);
 685                                 aiptek->curSetting.toolMode |= TOOL_BUTTON_FIRED_BIT;
 686                         }
 687
 688                         if (p != 0) {
 689                                 input_report_key(inputdev, BTN_LEFT, left);
 690                                 input_report_key(inputdev, BTN_MIDDLE, middle);
 691                                 input_report_key(inputdev, BTN_RIGHT, right);
 692                         }
 693
 694                         /* For safety, we're sending key 'break' codes for the
 695                          * neighboring macro keys.
 696                          */
 697                         if (macro > 0) {
 698                                 input_report_key(inputdev,
 699                                                  macroKeyEvents[macro - 1], 0);
 700                         }
 701                         if (macro < 25) {
 702                                 input_report_key(inputdev,
 703                                                  macroKeyEvents[macro + 1], 0);
 704                         }
 705
 706                         input_report_key(inputdev, macroKeyEvents[macro], 1);
 707                         input_report_rel(inputdev, ABS_MISC,
 708                                          p | AIPTEK_REPORT_TOOL_MOUSE);
 709                         input_sync(inputdev);
 710                 }
 711         }
 712         /* We have no idea which tool can generate a report 6. Theoretically,
 713          * neither need to, having been given reports 4 & 5 for such use.
 714          * However, report 6 is the 'official-looking' report for macroKeys;
 715          * reports 4 & 5 supposively are used to support unnamed, unknown
 716          * hat switches (which just so happen to be the macroKeys.)
 717          */
 718         else if (data[0] == 6) {
 719                 macro = le16_to_cpu(get_unaligned((__le16 *) (data + 1)));
 720                 if (macro > 0) {
 721                         input_report_key(inputdev, macroKeyEvents[macro - 1],
 722                                          0);
 723                 }
 724                 if (macro < 25) {
 725                         input_report_key(inputdev, macroKeyEvents[macro + 1],
 726                                          0);
 727                 }
 728
 729                 /* If we've not already sent a tool_button_?? code, do
 730                  * so now. Then set FIRED_BIT so it won't be resent unless
 731                  * the user forces FIRED_BIT off.
 732                  */
 733                 if (TOOL_BUTTON_FIRED(aiptek->curSetting.toolMode) == 0) {
 734                         input_report_key(inputdev,
 735                                          TOOL_BUTTON(aiptek->curSetting.
 736                                                      toolMode), 1);
 737                         aiptek->curSetting.toolMode |= TOOL_BUTTON_FIRED_BIT;
 738                 }
 739
 740                 input_report_key(inputdev, macroKeyEvents[macro], 1);
 741                 input_report_abs(inputdev, ABS_MISC,
 742                                  1 | AIPTEK_REPORT_TOOL_UNKNOWN);
 743                 input_sync(inputdev);
 744         } else {
 745                 dbg("Unknown report %d", data[0]);
 746         }
 747
 748         /* Jitter may occur when the user presses a button on the stlyus
 749          * or the mouse. What we do to prevent that is wait 'x' milliseconds
 750          * following a 'jitterable' event, which should give the hand some time
 751          * stabilize itself.
 752          *
 753          * We just introduced aiptek->previousJitterable to carry forth the
 754          * notion that jitter occurs when the button state changes from on to off:
 755          * a person drawing, holding a button down is not subject to jittering.
 756          * With that in mind, changing from upper button depressed to lower button
 757          * WILL transition through a jitter delay.
 758          */
 759
 760         if (aiptek->previousJitterable != jitterable &&
 761             aiptek->curSetting.jitterDelay != 0 && aiptek->inDelay != 1) {
 762                 aiptek->endDelay = jiffies +
 763                     ((aiptek->curSetting.jitterDelay * HZ) / 1000);
 764                 aiptek->inDelay = 1;
 765         }
 766         aiptek->previousJitterable = jitterable;
 767
 768 exit:
 769         retval = usb_submit_urb(urb, GFP_ATOMIC);
 770         if (retval != 0) {
 771                 err("%s - usb_submit_urb failed with result %d",
 772                     __FUNCTION__, retval);
 773         }
 774 }
 775
 776 /***********************************************************************
 777  * These are the USB id's known so far. We do not identify them to
 778  * specific Aiptek model numbers, because there has been overlaps,
 779  * use, and reuse of id's in existing models. Certain models have
 780  * been known to use more than one ID, indicative perhaps of
 781  * manufacturing revisions. In any event, we consider these
 782  * IDs to not be model-specific nor unique.
 783  */
 784 static const struct usb_device_id aiptek_ids[] = {
 785         {USB_DEVICE(USB_VENDOR_ID_AIPTEK, 0x01)},
 786         {USB_DEVICE(USB_VENDOR_ID_AIPTEK, 0x10)},
 787         {USB_DEVICE(USB_VENDOR_ID_AIPTEK, 0x20)},
 788         {USB_DEVICE(USB_VENDOR_ID_AIPTEK, 0x21)},
 789         {USB_DEVICE(USB_VENDOR_ID_AIPTEK, 0x22)},
 790         {USB_DEVICE(USB_VENDOR_ID_AIPTEK, 0x23)},
 791         {USB_DEVICE(USB_VENDOR_ID_AIPTEK, 0x24)},
 792         {}
 793 };
 794
 795 MODULE_DEVICE_TABLE(usb, aiptek_ids);
 796
 797 /***********************************************************************
 798  * Open an instance of the tablet driver.
 799  */
 800 static int aiptek_open(struct input_dev *inputdev)
 801 {
 802         struct aiptek *aiptek = inputdev->private;
 803
 804         aiptek->urb->dev = aiptek->usbdev;
 805         if (usb_submit_urb(aiptek->urb, GFP_KERNEL) != 0)
 806                 return -EIO;
 807
 808         return 0;
 809 }
 810
 811 /***********************************************************************
 812  * Close an instance of the tablet driver.
 813  */
 814 static void aiptek_close(struct input_dev *inputdev)
 815 {
 816         struct aiptek *aiptek = inputdev->private;
 817
 818         usb_kill_urb(aiptek->urb);
 819 }
 820
 821 /***********************************************************************
 822  * aiptek_set_report and aiptek_get_report() are borrowed from Linux 2.4.x,
 823  * where they were known as usb_set_report and usb_get_report.
 824  */
 825 static int
 826 aiptek_set_report(struct aiptek *aiptek,
 827                   unsigned char report_type,
 828                   unsigned char report_id, void *buffer, int size)
 829 {
 830         return usb_control_msg(aiptek->usbdev,
 831                                usb_sndctrlpipe(aiptek->usbdev, 0),
 832                                USB_REQ_SET_REPORT,
 833                                USB_TYPE_CLASS | USB_RECIP_INTERFACE |
 834                                USB_DIR_OUT, (report_type << 8) + report_id,
 835                                aiptek->ifnum, buffer, size, 5000);
 836 }
 837
 838 static int
 839 aiptek_get_report(struct aiptek *aiptek,
 840                   unsigned char report_type,
 841                   unsigned char report_id, void *buffer, int size)
 842 {
 843         return usb_control_msg(aiptek->usbdev,
 844                                usb_rcvctrlpipe(aiptek->usbdev, 0),
 845                                USB_REQ_GET_REPORT,
 846                                USB_TYPE_CLASS | USB_RECIP_INTERFACE |
 847                                USB_DIR_IN, (report_type << 8) + report_id,
 848                                aiptek->ifnum, buffer, size, 5000);
 849 }
 850
 851 /***********************************************************************
 852  * Send a command to the tablet.
 853  */
 854 static int
 855 aiptek_command(struct aiptek *aiptek, unsigned char command, unsigned char data)
 856 {
 857         const int sizeof_buf = 3 * sizeof(u8);
 858         int ret;
 859         u8 *buf;
 860
 861         buf = kmalloc(sizeof_buf, GFP_KERNEL);
 862         if (!buf)
 863                 return -ENOMEM;
 864
 865         buf[0] = 2;
 866         buf[1] = command;
 867         buf[2] = data;
 868
 869         if ((ret =
 870              aiptek_set_report(aiptek, 3, 2, buf, sizeof_buf)) != sizeof_buf) {
 871                 dbg("aiptek_program: failed, tried to send: 0x%02x 0x%02x",
 872                     command, data);
 873         }
 874         kfree(buf);
 875         return ret < 0 ? ret : 0;
 876 }
 877
 878 /***********************************************************************
 879  * Retrieve information from the tablet. Querying info is defined as first
 880  * sending the {command,data} sequence as a command, followed by a wait
 881  * (aka, "programmaticDelay") and then a "read" request.
 882  */
 883 static int
 884 aiptek_query(struct aiptek *aiptek, unsigned char command, unsigned char data)
 885 {
 886         const int sizeof_buf = 3 * sizeof(u8);
 887         int ret;
 888         u8 *buf;
 889
 890         buf = kmalloc(sizeof_buf, GFP_KERNEL);
 891         if (!buf)
 892                 return -ENOMEM;
 893
 894         buf[0] = 2;
 895         buf[1] = command;
 896         buf[2] = data;
 897
 898         if (aiptek_command(aiptek, command, data) != 0) {
 899                 kfree(buf);
 900                 return -EIO;
 901         }
 902         msleep(aiptek->curSetting.programmableDelay);
 903
 904         if ((ret =
 905              aiptek_get_report(aiptek, 3, 2, buf, sizeof_buf)) != sizeof_buf) {
 906                 dbg("aiptek_query failed: returned 0x%02x 0x%02x 0x%02x",
 907                     buf[0], buf[1], buf[2]);
 908                 ret = -EIO;
 909         } else {
 910                 ret = le16_to_cpu(get_unaligned((__le16 *) (buf + 1)));
 911         }
 912         kfree(buf);
 913         return ret;
 914 }
 915
 916 /***********************************************************************
 917  * Program the tablet into either absolute or relative mode.
 918  * We also get information about the tablet's size.
 919  */
 920 static int aiptek_program_tablet(struct aiptek *aiptek)
 921 {
 922         int ret;
 923         /* Execute Resolution500LPI */
 924         if ((ret = aiptek_command(aiptek, 0x18, 0x04)) < 0)
 925                 return ret;
 926
 927         /* Query getModelCode */
 928         if ((ret = aiptek_query(aiptek, 0x02, 0x00)) < 0)
 929                 return ret;
 930         aiptek->features.modelCode = ret & 0xff;
 931
 932         /* Query getODMCode */
 933         if ((ret = aiptek_query(aiptek, 0x03, 0x00)) < 0)
 934                 return ret;
 935         aiptek->features.odmCode = ret;
 936
 937         /* Query getFirmwareCode */
 938         if ((ret = aiptek_query(aiptek, 0x04, 0x00)) < 0)
 939                 return ret;
 940         aiptek->features.firmwareCode = ret;
 941
 942         /* Query getXextension */
 943         if ((ret = aiptek_query(aiptek, 0x01, 0x00)) < 0)
 944                 return ret;
 945         aiptek->inputdev->absmin[ABS_X] = 0;
 946         aiptek->inputdev->absmax[ABS_X] = ret - 1;
 947
 948         /* Query getYextension */
 949         if ((ret = aiptek_query(aiptek, 0x01, 0x01)) < 0)
 950                 return ret;
 951         aiptek->inputdev->absmin[ABS_Y] = 0;
 952         aiptek->inputdev->absmax[ABS_Y] = ret - 1;
 953
 954         /* Query getPressureLevels */
 955         if ((ret = aiptek_query(aiptek, 0x08, 0x00)) < 0)
 956                 return ret;
 957         aiptek->inputdev->absmin[ABS_PRESSURE] = 0;
 958         aiptek->inputdev->absmax[ABS_PRESSURE] = ret - 1;
 959
 960         /* Depending on whether we are in absolute or relative mode, we will
 961          * do a switchToTablet(absolute) or switchToMouse(relative) command.
 962          */
 963         if (aiptek->curSetting.coordinateMode ==
 964             AIPTEK_COORDINATE_ABSOLUTE_MODE) {
 965                 /* Execute switchToTablet */
 966                 if ((ret = aiptek_command(aiptek, 0x10, 0x01)) < 0) {
 967                         return ret;
 968                 }
 969         } else {
 970                 /* Execute switchToMouse */
 971                 if ((ret = aiptek_command(aiptek, 0x10, 0x00)) < 0) {
 972                         return ret;
 973                 }
 974         }
 975
 976         /* Enable the macro keys */
 977         if ((ret = aiptek_command(aiptek, 0x11, 0x02)) < 0)
 978                 return ret;
 979 #if 0
 980         /* Execute FilterOn */
 981         if ((ret = aiptek_command(aiptek, 0x17, 0x00)) < 0)
 982                 return ret;
 983 #endif
 984
 985         /* Execute AutoGainOn */
 986         if ((ret = aiptek_command(aiptek, 0x12, 0xff)) < 0)
 987                 return ret;
 988
 989         /* Reset the eventCount, so we track events from last (re)programming
 990          */
 991         aiptek->diagnostic = AIPTEK_DIAGNOSTIC_NA;
 992         aiptek->eventCount = 0;
 993
 994         return 0;
 995 }
 996
 997 /***********************************************************************
 998  * Sysfs functions. Sysfs prefers that individually-tunable parameters
 999  * exist in their separate pseudo-files. Summary data that is immutable
1000  * may exist in a singular file so long as you don't define a writeable
1001  * interface.
1002  */
1003
1004 /***********************************************************************
1005  * support the 'size' file -- display support
1006  */
1007 static ssize_t show_tabletSize(struct device *dev, struct device_attribute *attr, char *buf)
1008 {
1009         struct aiptek *aiptek = dev_get_drvdata(dev);
1010
1011         if (aiptek == NULL)
1012                 return 0;
1013
1014         return snprintf(buf, PAGE_SIZE, "%dx%d\n",
1015                         aiptek->inputdev->absmax[ABS_X] + 1,
1016                         aiptek->inputdev->absmax[ABS_Y] + 1);
1017 }
1018
1019 /* These structs define the sysfs files, param #1 is the name of the
1020  * file, param 2 is the file permissions, param 3 & 4 are to the
1021  * output generator and input parser routines. Absence of a routine is
1022  * permitted -- it only means can't either 'cat' the file, or send data
1023  * to it.
1024  */
1025 static DEVICE_ATTR(size, S_IRUGO, show_tabletSize, NULL);
1026
1027 /***********************************************************************
1028  * support routines for the 'product_id' file
1029  */
1030 static ssize_t show_tabletProductId(struct device *dev, struct device_attribute *attr, char *buf)
1031 {
1032         struct aiptek *aiptek = dev_get_drvdata(dev);
1033
1034         if (aiptek == NULL)
1035                 return 0;
1036
1037         return snprintf(buf, PAGE_SIZE, "0x%04x\n",
1038                         aiptek->inputdev->id.product);
1039 }
1040
1041 static DEVICE_ATTR(product_id, S_IRUGO, show_tabletProductId, NULL);
1042
1043 /***********************************************************************
1044  * support routines for the 'vendor_id' file
1045  */
1046 static ssize_t show_tabletVendorId(struct device *dev, struct device_attribute *attr, char *buf)
1047 {
1048         struct aiptek *aiptek = dev_get_drvdata(dev);
1049
1050         if (aiptek == NULL)
1051                 return 0;
1052
1053         return snprintf(buf, PAGE_SIZE, "0x%04x\n", aiptek->inputdev->id.vendor);
1054 }
1055
1056 static DEVICE_ATTR(vendor_id, S_IRUGO, show_tabletVendorId, NULL);
1057
1058 /***********************************************************************
1059  * support routines for the 'vendor' file
1060  */
1061 static ssize_t show_tabletManufacturer(struct device *dev, struct device_attribute *attr, char *buf)
1062 {
1063         struct aiptek *aiptek = dev_get_drvdata(dev);
1064         int retval;
1065
1066         if (aiptek == NULL)
1067                 return 0;
1068
1069         retval = snprintf(buf, PAGE_SIZE, "%s\n", aiptek->usbdev->manufacturer);
1070         return retval;
1071 }
1072
1073 static DEVICE_ATTR(vendor, S_IRUGO, show_tabletManufacturer, NULL);
1074
1075 /***********************************************************************
1076  * support routines for the 'product' file
1077  */
1078 static ssize_t show_tabletProduct(struct device *dev, struct device_attribute *attr, char *buf)
1079 {
1080         struct aiptek *aiptek = dev_get_drvdata(dev);
1081         int retval;
1082
1083         if (aiptek == NULL)
1084                 return 0;
1085
1086         retval = snprintf(buf, PAGE_SIZE, "%s\n", aiptek->usbdev->product);
1087         return retval;
1088 }
1089
1090 static DEVICE_ATTR(product, S_IRUGO, show_tabletProduct, NULL);
1091
1092 /***********************************************************************
1093  * support routines for the 'pointer_mode' file. Note that this file
1094  * both displays current setting and allows reprogramming.
1095  */
1096 static ssize_t show_tabletPointerMode(struct device *dev, struct device_attribute *attr, char *buf)
1097 {
1098         struct aiptek *aiptek = dev_get_drvdata(dev);
1099         char *s;
1100
1101         if (aiptek == NULL)
1102                 return 0;
1103
1104         switch (aiptek->curSetting.pointerMode) {
1105         case AIPTEK_POINTER_ONLY_STYLUS_MODE:
1106                 s = "stylus";
1107                 break;
1108
1109         case AIPTEK_POINTER_ONLY_MOUSE_MODE:
1110                 s = "mouse";
1111                 break;
1112
1113         case AIPTEK_POINTER_EITHER_MODE:
1114                 s = "either";
1115                 break;
1116
1117         default:
1118                 s = "unknown";
1119                 break;
1120         }
1121         return snprintf(buf, PAGE_SIZE, "%s\n", s);
1122 }
1123
1124 static ssize_t
1125 store_tabletPointerMode(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1126 {
1127         struct aiptek *aiptek = dev_get_drvdata(dev);
1128         if (aiptek == NULL)
1129                 return 0;
1130
1131         if (strcmp(buf, "stylus") == 0) {
1132                 aiptek->newSetting.pointerMode =
1133                     AIPTEK_POINTER_ONLY_STYLUS_MODE;
1134         } else if (strcmp(buf, "mouse") == 0) {
1135                 aiptek->newSetting.pointerMode = AIPTEK_POINTER_ONLY_MOUSE_MODE;
1136         } else if (strcmp(buf, "either") == 0) {
1137                 aiptek->newSetting.pointerMode = AIPTEK_POINTER_EITHER_MODE;
1138         }
1139         return count;
1140 }
1141
1142 static DEVICE_ATTR(pointer_mode,
1143                    S_IRUGO | S_IWUGO,
1144                    show_tabletPointerMode, store_tabletPointerMode);
1145
1146 /***********************************************************************
1147  * support routines for the 'coordinate_mode' file. Note that this file
1148  * both displays current setting and allows reprogramming.
1149  */
1150 static ssize_t show_tabletCoordinateMode(struct device *dev, struct device_attribute *attr, char *buf)
1151 {
1152         struct aiptek *aiptek = dev_get_drvdata(dev);
1153         char *s;
1154
1155         if (aiptek == NULL)
1156                 return 0;
1157
1158         switch (aiptek->curSetting.coordinateMode) {
1159         case AIPTEK_COORDINATE_ABSOLUTE_MODE:
1160                 s = "absolute";
1161                 break;
1162
1163         case AIPTEK_COORDINATE_RELATIVE_MODE:
1164                 s = "relative";
1165                 break;
1166
1167         default:
1168                 s = "unknown";
1169                 break;
1170         }
1171         return snprintf(buf, PAGE_SIZE, "%s\n", s);
1172 }
1173
1174 static ssize_t
1175 store_tabletCoordinateMode(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1176 {
1177         struct aiptek *aiptek = dev_get_drvdata(dev);
1178         if (aiptek == NULL)
1179                 return 0;
1180
1181         if (strcmp(buf, "absolute") == 0) {
1182                 aiptek->newSetting.pointerMode =
1183                     AIPTEK_COORDINATE_ABSOLUTE_MODE;
1184         } else if (strcmp(buf, "relative") == 0) {
1185                 aiptek->newSetting.pointerMode =
1186                     AIPTEK_COORDINATE_RELATIVE_MODE;
1187         }
1188         return count;
1189 }
1190
1191 static DEVICE_ATTR(coordinate_mode,
1192                    S_IRUGO | S_IWUGO,
1193                    show_tabletCoordinateMode, store_tabletCoordinateMode);
1194
1195 /***********************************************************************
1196  * support routines for the 'tool_mode' file. Note that this file
1197  * both displays current setting and allows reprogramming.
1198  */
1199 static ssize_t show_tabletToolMode(struct device *dev, struct device_attribute *attr, char *buf)
1200 {
1201         struct aiptek *aiptek = dev_get_drvdata(dev);
1202         char *s;
1203
1204         if (aiptek == NULL)
1205                 return 0;
1206
1207         switch (TOOL_BUTTON(aiptek->curSetting.toolMode)) {
1208         case AIPTEK_TOOL_BUTTON_MOUSE_MODE:
1209                 s = "mouse";
1210                 break;
1211
1212         case AIPTEK_TOOL_BUTTON_ERASER_MODE:
1213                 s = "eraser";
1214                 break;
1215
1216         case AIPTEK_TOOL_BUTTON_PENCIL_MODE:
1217                 s = "pencil";
1218                 break;
1219
1220         case AIPTEK_TOOL_BUTTON_PEN_MODE:
1221                 s = "pen";
1222                 break;
1223
1224         case AIPTEK_TOOL_BUTTON_BRUSH_MODE:
1225                 s = "brush";
1226                 break;
1227
1228         case AIPTEK_TOOL_BUTTON_AIRBRUSH_MODE:
1229                 s = "airbrush";
1230                 break;
1231
1232         case AIPTEK_TOOL_BUTTON_LENS_MODE:
1233                 s = "lens";
1234                 break;
1235
1236         default:
1237                 s = "unknown";
1238                 break;
1239         }
1240         return snprintf(buf, PAGE_SIZE, "%s\n", s);
1241 }
1242
1243 static ssize_t
1244 store_tabletToolMode(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1245 {
1246         struct aiptek *aiptek = dev_get_drvdata(dev);
1247         if (aiptek == NULL)
1248                 return 0;
1249
1250         if (strcmp(buf, "mouse") == 0) {
1251                 aiptek->newSetting.toolMode = AIPTEK_TOOL_BUTTON_MOUSE_MODE;
1252         } else if (strcmp(buf, "eraser") == 0) {
1253                 aiptek->newSetting.toolMode = AIPTEK_TOOL_BUTTON_ERASER_MODE;
1254         } else if (strcmp(buf, "pencil") == 0) {
1255                 aiptek->newSetting.toolMode = AIPTEK_TOOL_BUTTON_PENCIL_MODE;
1256         } else if (strcmp(buf, "pen") == 0) {
1257                 aiptek->newSetting.toolMode = AIPTEK_TOOL_BUTTON_PEN_MODE;
1258         } else if (strcmp(buf, "brush") == 0) {
1259                 aiptek->newSetting.toolMode = AIPTEK_TOOL_BUTTON_BRUSH_MODE;
1260         } else if (strcmp(buf, "airbrush") == 0) {
1261                 aiptek->newSetting.toolMode = AIPTEK_TOOL_BUTTON_AIRBRUSH_MODE;
1262         } else if (strcmp(buf, "lens") == 0) {
1263                 aiptek->newSetting.toolMode = AIPTEK_TOOL_BUTTON_LENS_MODE;
1264         }
1265
1266         return count;
1267 }
1268
1269 static DEVICE_ATTR(tool_mode,
1270                    S_IRUGO | S_IWUGO,
1271                    show_tabletToolMode, store_tabletToolMode);
1272
1273 /***********************************************************************
1274  * support routines for the 'xtilt' file. Note that this file
1275  * both displays current setting and allows reprogramming.
1276  */
1277 static ssize_t show_tabletXtilt(struct device *dev, struct device_attribute *attr, char *buf)
1278 {
1279         struct aiptek *aiptek = dev_get_drvdata(dev);
1280
1281         if (aiptek == NULL)
1282                 return 0;
1283
1284         if (aiptek->curSetting.xTilt == AIPTEK_TILT_DISABLE) {
1285                 return snprintf(buf, PAGE_SIZE, "disable\n");
1286         } else {
1287                 return snprintf(buf, PAGE_SIZE, "%d\n",
1288                                 aiptek->curSetting.xTilt);
1289         }
1290 }
1291
1292 static ssize_t
1293 store_tabletXtilt(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1294 {
1295         struct aiptek *aiptek = dev_get_drvdata(dev);
1296         int x;
1297
1298         if (aiptek == NULL)
1299                 return 0;
1300
1301         if (strcmp(buf, "disable") == 0) {
1302                 aiptek->newSetting.xTilt = AIPTEK_TILT_DISABLE;
1303         } else {
1304                 x = (int)simple_strtol(buf, NULL, 10);
1305                 if (x >= AIPTEK_TILT_MIN && x <= AIPTEK_TILT_MAX) {
1306                         aiptek->newSetting.xTilt = x;
1307                 }
1308         }
1309         return count;
1310 }
1311
1312 static DEVICE_ATTR(xtilt,
1313                    S_IRUGO | S_IWUGO, show_tabletXtilt, store_tabletXtilt);
1314
1315 /***********************************************************************
1316  * support routines for the 'ytilt' file. Note that this file
1317  * both displays current setting and allows reprogramming.
1318  */
1319 static ssize_t show_tabletYtilt(struct device *dev, struct device_attribute *attr, char *buf)
1320 {
1321         struct aiptek *aiptek = dev_get_drvdata(dev);
1322
1323         if (aiptek == NULL)
1324                 return 0;
1325
1326         if (aiptek->curSetting.yTilt == AIPTEK_TILT_DISABLE) {
1327                 return snprintf(buf, PAGE_SIZE, "disable\n");
1328         } else {
1329                 return snprintf(buf, PAGE_SIZE, "%d\n",
1330                                 aiptek->curSetting.yTilt);
1331         }
1332 }
1333
1334 static ssize_t
1335 store_tabletYtilt(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1336 {
1337         struct aiptek *aiptek = dev_get_drvdata(dev);
1338         int y;
1339
1340         if (aiptek == NULL)
1341                 return 0;
1342
1343         if (strcmp(buf, "disable") == 0) {
1344                 aiptek->newSetting.yTilt = AIPTEK_TILT_DISABLE;
1345         } else {
1346                 y = (int)simple_strtol(buf, NULL, 10);
1347                 if (y >= AIPTEK_TILT_MIN && y <= AIPTEK_TILT_MAX) {
1348                         aiptek->newSetting.yTilt = y;
1349                 }
1350         }
1351         return count;
1352 }
1353
1354 static DEVICE_ATTR(ytilt,
1355                    S_IRUGO | S_IWUGO, show_tabletYtilt, store_tabletYtilt);
1356
1357 /***********************************************************************
1358  * support routines for the 'jitter' file. Note that this file
1359  * both displays current setting and allows reprogramming.
1360  */
1361 static ssize_t show_tabletJitterDelay(struct device *dev, struct device_attribute *attr, char *buf)
1362 {
1363         struct aiptek *aiptek = dev_get_drvdata(dev);
1364
1365         if (aiptek == NULL)
1366                 return 0;
1367
1368         return snprintf(buf, PAGE_SIZE, "%d\n", aiptek->curSetting.jitterDelay);
1369 }
1370
1371 static ssize_t
1372 store_tabletJitterDelay(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1373 {
1374         struct aiptek *aiptek = dev_get_drvdata(dev);
1375
1376         if (aiptek == NULL)
1377                 return 0;
1378
1379         aiptek->newSetting.jitterDelay = (int)simple_strtol(buf, NULL, 10);
1380         return count;
1381 }
1382
1383 static DEVICE_ATTR(jitter,
1384                    S_IRUGO | S_IWUGO,
1385                    show_tabletJitterDelay, store_tabletJitterDelay);
1386
1387 /***********************************************************************
1388  * support routines for the 'delay' file. Note that this file
1389  * both displays current setting and allows reprogramming.
1390  */
1391 static ssize_t show_tabletProgrammableDelay(struct device *dev, struct device_attribute *attr, char *buf)
1392 {
1393         struct aiptek *aiptek = dev_get_drvdata(dev);
1394
1395         if (aiptek == NULL)
1396                 return 0;
1397
1398         return snprintf(buf, PAGE_SIZE, "%d\n",
1399                         aiptek->curSetting.programmableDelay);
1400 }
1401
1402 static ssize_t
1403 store_tabletProgrammableDelay(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1404 {
1405         struct aiptek *aiptek = dev_get_drvdata(dev);
1406
1407         if (aiptek == NULL)
1408                 return 0;
1409
1410         aiptek->newSetting.programmableDelay = (int)simple_strtol(buf, NULL, 10);
1411         return count;
1412 }
1413
1414 static DEVICE_ATTR(delay,
1415                    S_IRUGO | S_IWUGO,
1416                    show_tabletProgrammableDelay, store_tabletProgrammableDelay);
1417
1418 /***********************************************************************
1419  * support routines for the 'input_path' file. Note that this file
1420  * only displays current setting.
1421  */
1422 static ssize_t show_tabletInputDevice(struct device *dev, struct device_attribute *attr, char *buf)
1423 {
1424         struct aiptek *aiptek = dev_get_drvdata(dev);
1425
1426         if (aiptek == NULL)
1427                 return 0;
1428
1429         return snprintf(buf, PAGE_SIZE, "/dev/input/%s\n",
1430                         aiptek->features.inputPath);
1431 }
1432
1433 static DEVICE_ATTR(input_path, S_IRUGO, show_tabletInputDevice, NULL);
1434
1435 /***********************************************************************
1436  * support routines for the 'event_count' file. Note that this file
1437  * only displays current setting.
1438  */
1439 static ssize_t show_tabletEventsReceived(struct device *dev, struct device_attribute *attr, char *buf)
1440 {
1441         struct aiptek *aiptek = dev_get_drvdata(dev);
1442
1443         if (aiptek == NULL)
1444                 return 0;
1445
1446         return snprintf(buf, PAGE_SIZE, "%ld\n", aiptek->eventCount);
1447 }
1448
1449 static DEVICE_ATTR(event_count, S_IRUGO, show_tabletEventsReceived, NULL);
1450
1451 /***********************************************************************
1452  * support routines for the 'diagnostic' file. Note that this file
1453  * only displays current setting.
1454  */
1455 static ssize_t show_tabletDiagnosticMessage(struct device *dev, struct device_attribute *attr, char *buf)
1456 {
1457         struct aiptek *aiptek = dev_get_drvdata(dev);
1458         char *retMsg;
1459
1460         if (aiptek == NULL)
1461                 return 0;
1462
1463         switch (aiptek->diagnostic) {
1464         case AIPTEK_DIAGNOSTIC_NA:
1465                 retMsg = "no errors\n";
1466                 break;
1467
1468         case AIPTEK_DIAGNOSTIC_SENDING_RELATIVE_IN_ABSOLUTE:
1469                 retMsg = "Error: receiving relative reports\n";
1470                 break;
1471
1472         case AIPTEK_DIAGNOSTIC_SENDING_ABSOLUTE_IN_RELATIVE:
1473                 retMsg = "Error: receiving absolute reports\n";
1474                 break;
1475
1476         case AIPTEK_DIAGNOSTIC_TOOL_DISALLOWED:
1477                 if (aiptek->curSetting.pointerMode ==
1478                     AIPTEK_POINTER_ONLY_MOUSE_MODE) {
1479                         retMsg = "Error: receiving stylus reports\n";
1480                 } else {
1481                         retMsg = "Error: receiving mouse reports\n";
1482                 }
1483                 break;
1484
1485         default:
1486                 return 0;
1487         }
1488         return snprintf(buf, PAGE_SIZE, retMsg);
1489 }
1490
1491 static DEVICE_ATTR(diagnostic, S_IRUGO, show_tabletDiagnosticMessage, NULL);
1492
1493 /***********************************************************************
1494  * support routines for the 'stylus_upper' file. Note that this file
1495  * both displays current setting and allows for setting changing.
1496  */
1497 static ssize_t show_tabletStylusUpper(struct device *dev, struct device_attribute *attr, char *buf)
1498 {
1499         struct aiptek *aiptek = dev_get_drvdata(dev);
1500         char *s;
1501
1502         if (aiptek == NULL)
1503                 return 0;
1504
1505         switch (aiptek->curSetting.stylusButtonUpper) {
1506         case AIPTEK_STYLUS_UPPER_BUTTON:
1507                 s = "upper";
1508                 break;
1509
1510         case AIPTEK_STYLUS_LOWER_BUTTON:
1511                 s = "lower";
1512                 break;
1513
1514         default:
1515                 s = "unknown";
1516                 break;
1517         }
1518         return snprintf(buf, PAGE_SIZE, "%s\n", s);
1519 }
1520
1521 static ssize_t
1522 store_tabletStylusUpper(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1523 {
1524         struct aiptek *aiptek = dev_get_drvdata(dev);
1525
1526         if (aiptek == NULL)
1527                 return 0;
1528
1529         if (strcmp(buf, "upper") == 0) {
1530                 aiptek->newSetting.stylusButtonUpper =
1531                     AIPTEK_STYLUS_UPPER_BUTTON;
1532         } else if (strcmp(buf, "lower") == 0) {
1533                 aiptek->newSetting.stylusButtonUpper =
1534                     AIPTEK_STYLUS_LOWER_BUTTON;
1535         }
1536         return count;
1537 }
1538
1539 static DEVICE_ATTR(stylus_upper,
1540                    S_IRUGO | S_IWUGO,
1541                    show_tabletStylusUpper, store_tabletStylusUpper);
1542
1543 /***********************************************************************
1544  * support routines for the 'stylus_lower' file. Note that this file
1545  * both displays current setting and allows for setting changing.
1546  */
1547 static ssize_t show_tabletStylusLower(struct device *dev, struct device_attribute *attr, char *buf)
1548 {
1549         struct aiptek *aiptek = dev_get_drvdata(dev);
1550         char *s;
1551
1552         if (aiptek == NULL)
1553                 return 0;
1554
1555         switch (aiptek->curSetting.stylusButtonLower) {
1556         case AIPTEK_STYLUS_UPPER_BUTTON:
1557                 s = "upper";
1558                 break;
1559
1560         case AIPTEK_STYLUS_LOWER_BUTTON:
1561                 s = "lower";
1562                 break;
1563
1564         default:
1565                 s = "unknown";
1566                 break;
1567         }
1568         return snprintf(buf, PAGE_SIZE, "%s\n", s);
1569 }
1570
1571 static ssize_t
1572 store_tabletStylusLower(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1573 {
1574         struct aiptek *aiptek = dev_get_drvdata(dev);
1575
1576         if (aiptek == NULL)
1577                 return 0;
1578
1579         if (strcmp(buf, "upper") == 0) {
1580                 aiptek->newSetting.stylusButtonLower =
1581                     AIPTEK_STYLUS_UPPER_BUTTON;
1582         } else if (strcmp(buf, "lower") == 0) {
1583                 aiptek->newSetting.stylusButtonLower =
1584                     AIPTEK_STYLUS_LOWER_BUTTON;
1585         }
1586         return count;
1587 }
1588
1589 static DEVICE_ATTR(stylus_lower,
1590                    S_IRUGO | S_IWUGO,
1591                    show_tabletStylusLower, store_tabletStylusLower);
1592
1593 /***********************************************************************
1594  * support routines for the 'mouse_left' file. Note that this file
1595  * both displays current setting and allows for setting changing.
1596  */
1597 static ssize_t show_tabletMouseLeft(struct device *dev, struct device_attribute *attr, char *buf)
1598 {
1599         struct aiptek *aiptek = dev_get_drvdata(dev);
1600         char *s;
1601
1602         if (aiptek == NULL)
1603                 return 0;
1604
1605         switch (aiptek->curSetting.mouseButtonLeft) {
1606         case AIPTEK_MOUSE_LEFT_BUTTON:
1607                 s = "left";
1608                 break;
1609
1610         case AIPTEK_MOUSE_MIDDLE_BUTTON:
1611                 s = "middle";
1612                 break;
1613
1614         case AIPTEK_MOUSE_RIGHT_BUTTON:
1615                 s = "right";
1616                 break;
1617
1618         default:
1619                 s = "unknown";
1620                 break;
1621         }
1622         return snprintf(buf, PAGE_SIZE, "%s\n", s);
1623 }
1624
1625 static ssize_t
1626 store_tabletMouseLeft(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1627 {
1628         struct aiptek *aiptek = dev_get_drvdata(dev);
1629
1630         if (aiptek == NULL)
1631                 return 0;
1632
1633         if (strcmp(buf, "left") == 0) {
1634                 aiptek->newSetting.mouseButtonLeft = AIPTEK_MOUSE_LEFT_BUTTON;
1635         } else if (strcmp(buf, "middle") == 0) {
1636                 aiptek->newSetting.mouseButtonLeft = AIPTEK_MOUSE_MIDDLE_BUTTON;
1637         } else if (strcmp(buf, "right") == 0) {
1638                 aiptek->newSetting.mouseButtonLeft = AIPTEK_MOUSE_RIGHT_BUTTON;
1639         }
1640         return count;
1641 }
1642
1643 static DEVICE_ATTR(mouse_left,
1644                    S_IRUGO | S_IWUGO,
1645                    show_tabletMouseLeft, store_tabletMouseLeft);
1646
1647 /***********************************************************************
1648  * support routines for the 'mouse_middle' file. Note that this file
1649  * both displays current setting and allows for setting changing.
1650  */
1651 static ssize_t show_tabletMouseMiddle(struct device *dev, struct device_attribute *attr, char *buf)
1652 {
1653         struct aiptek *aiptek = dev_get_drvdata(dev);
1654         char *s;
1655
1656         if (aiptek == NULL)
1657                 return 0;
1658
1659         switch (aiptek->curSetting.mouseButtonMiddle) {
1660         case AIPTEK_MOUSE_LEFT_BUTTON:
1661                 s = "left";
1662                 break;
1663
1664         case AIPTEK_MOUSE_MIDDLE_BUTTON:
1665                 s = "middle";
1666                 break;
1667
1668         case AIPTEK_MOUSE_RIGHT_BUTTON:
1669                 s = "right";
1670                 break;
1671
1672         default:
1673                 s = "unknown";
1674                 break;
1675         }
1676         return snprintf(buf, PAGE_SIZE, "%s\n", s);
1677 }
1678
1679 static ssize_t
1680 store_tabletMouseMiddle(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1681 {
1682         struct aiptek *aiptek = dev_get_drvdata(dev);
1683
1684         if (aiptek == NULL)
1685                 return 0;
1686
1687         if (strcmp(buf, "left") == 0) {
1688                 aiptek->newSetting.mouseButtonMiddle = AIPTEK_MOUSE_LEFT_BUTTON;
1689         } else if (strcmp(buf, "middle") == 0) {
1690                 aiptek->newSetting.mouseButtonMiddle =
1691                     AIPTEK_MOUSE_MIDDLE_BUTTON;
1692         } else if (strcmp(buf, "right") == 0) {
1693                 aiptek->newSetting.mouseButtonMiddle =
1694                     AIPTEK_MOUSE_RIGHT_BUTTON;
1695         }
1696         return count;
1697 }
1698
1699 static DEVICE_ATTR(mouse_middle,
1700                    S_IRUGO | S_IWUGO,
1701                    show_tabletMouseMiddle, store_tabletMouseMiddle);
1702
1703 /***********************************************************************
1704  * support routines for the 'mouse_right' file. Note that this file
1705  * both displays current setting and allows for setting changing.
1706  */
1707 static ssize_t show_tabletMouseRight(struct device *dev, struct device_attribute *attr, char *buf)
1708 {
1709         struct aiptek *aiptek = dev_get_drvdata(dev);
1710         char *s;
1711
1712         if (aiptek == NULL)
1713                 return 0;
1714
1715         switch (aiptek->curSetting.mouseButtonRight) {
1716         case AIPTEK_MOUSE_LEFT_BUTTON:
1717                 s = "left";
1718                 break;
1719
1720         case AIPTEK_MOUSE_MIDDLE_BUTTON:
1721                 s = "middle";
1722                 break;
1723
1724         case AIPTEK_MOUSE_RIGHT_BUTTON:
1725                 s = "right";
1726                 break;
1727
1728         default:
1729                 s = "unknown";
1730                 break;
1731         }
1732         return snprintf(buf, PAGE_SIZE, "%s\n", s);
1733 }
1734
1735 static ssize_t
1736 store_tabletMouseRight(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1737 {
1738         struct aiptek *aiptek = dev_get_drvdata(dev);
1739
1740         if (aiptek == NULL)
1741                 return 0;
1742
1743         if (strcmp(buf, "left") == 0) {
1744                 aiptek->newSetting.mouseButtonRight = AIPTEK_MOUSE_LEFT_BUTTON;
1745         } else if (strcmp(buf, "middle") == 0) {
1746                 aiptek->newSetting.mouseButtonRight =
1747                     AIPTEK_MOUSE_MIDDLE_BUTTON;
1748         } else if (strcmp(buf, "right") == 0) {
1749                 aiptek->newSetting.mouseButtonRight = AIPTEK_MOUSE_RIGHT_BUTTON;
1750         }
1751         return count;
1752 }
1753
1754 static DEVICE_ATTR(mouse_right,
1755                    S_IRUGO | S_IWUGO,
1756                    show_tabletMouseRight, store_tabletMouseRight);
1757
1758 /***********************************************************************
1759  * support routines for the 'wheel' file. Note that this file
1760  * both displays current setting and allows for setting changing.
1761  */
1762 static ssize_t show_tabletWheel(struct device *dev, struct device_attribute *attr, char *buf)
1763 {
1764         struct aiptek *aiptek = dev_get_drvdata(dev);
1765
1766         if (aiptek == NULL)
1767                 return 0;
1768
1769         if (aiptek->curSetting.wheel == AIPTEK_WHEEL_DISABLE) {
1770                 return snprintf(buf, PAGE_SIZE, "disable\n");
1771         } else {
1772                 return snprintf(buf, PAGE_SIZE, "%d\n",
1773                                 aiptek->curSetting.wheel);
1774         }
1775 }
1776
1777 static ssize_t
1778 store_tabletWheel(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1779 {
1780         struct aiptek *aiptek = dev_get_drvdata(dev);
1781
1782         if (aiptek == NULL)
1783                 return 0;
1784
1785         aiptek->newSetting.wheel = (int)simple_strtol(buf, NULL, 10);
1786         return count;
1787 }
1788
1789 static DEVICE_ATTR(wheel,
1790                    S_IRUGO | S_IWUGO, show_tabletWheel, store_tabletWheel);
1791
1792 /***********************************************************************
1793  * support routines for the 'execute' file. Note that this file
1794  * both displays current setting and allows for setting changing.
1795  */
1796 static ssize_t show_tabletExecute(struct device *dev, struct device_attribute *attr, char *buf)
1797 {
1798         struct aiptek *aiptek = dev_get_drvdata(dev);
1799
1800         if (aiptek == NULL)
1801                 return 0;
1802
1803         /* There is nothing useful to display, so a one-line manual
1804          * is in order...
1805          */
1806         return snprintf(buf, PAGE_SIZE,
1807                         "Write anything to this file to program your tablet.\n");
1808 }
1809
1810 static ssize_t
1811 store_tabletExecute(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1812 {
1813         struct aiptek *aiptek = dev_get_drvdata(dev);
1814
1815         if (aiptek == NULL)
1816                 return 0;
1817
1818         /* We do not care what you write to this file. Merely the action
1819          * of writing to this file triggers a tablet reprogramming.
1820          */
1821         memcpy(&aiptek->curSetting, &aiptek->newSetting,
1822                sizeof(struct aiptek_settings));
1823
1824         if (aiptek_program_tablet(aiptek) < 0)
1825                 return -EIO;
1826
1827         return count;
1828 }
1829
1830 static DEVICE_ATTR(execute,
1831                    S_IRUGO | S_IWUGO, show_tabletExecute, store_tabletExecute);
1832
1833 /***********************************************************************
1834  * support routines for the 'odm_code' file. Note that this file
1835  * only displays current setting.
1836  */
1837 static ssize_t show_tabletODMCode(struct device *dev, struct device_attribute *attr, char *buf)
1838 {
1839         struct aiptek *aiptek = dev_get_drvdata(dev);
1840
1841         if (aiptek == NULL)
1842                 return 0;
1843
1844         return snprintf(buf, PAGE_SIZE, "0x%04x\n", aiptek->features.odmCode);
1845 }
1846
1847 static DEVICE_ATTR(odm_code, S_IRUGO, show_tabletODMCode, NULL);
1848
1849 /***********************************************************************
1850  * support routines for the 'model_code' file. Note that this file
1851  * only displays current setting.
1852  */
1853 static ssize_t show_tabletModelCode(struct device *dev, struct device_attribute *attr, char *buf)
1854 {
1855         struct aiptek *aiptek = dev_get_drvdata(dev);
1856
1857         if (aiptek == NULL)
1858                 return 0;
1859
1860         return snprintf(buf, PAGE_SIZE, "0x%04x\n", aiptek->features.modelCode);
1861 }
1862
1863 static DEVICE_ATTR(model_code, S_IRUGO, show_tabletModelCode, NULL);
1864
1865 /***********************************************************************
1866  * support routines for the 'firmware_code' file. Note that this file
1867  * only displays current setting.
1868  */
1869 static ssize_t show_firmwareCode(struct device *dev, struct device_attribute *attr, char *buf)
1870 {
1871         struct aiptek *aiptek = dev_get_drvdata(dev);
1872
1873         if (aiptek == NULL)
1874                 return 0;
1875
1876         return snprintf(buf, PAGE_SIZE, "%04x\n",
1877                         aiptek->features.firmwareCode);
1878 }
1879
1880 static DEVICE_ATTR(firmware_code, S_IRUGO, show_firmwareCode, NULL);
1881
1882 /***********************************************************************
1883  * This routine removes all existing sysfs files managed by this device
1884  * driver.
1885  */
1886 static void aiptek_delete_files(struct device *dev)
1887 {
1888         device_remove_file(dev, &dev_attr_size);
1889         device_remove_file(dev, &dev_attr_product_id);
1890         device_remove_file(dev, &dev_attr_vendor_id);
1891         device_remove_file(dev, &dev_attr_vendor);
1892         device_remove_file(dev, &dev_attr_product);
1893         device_remove_file(dev, &dev_attr_pointer_mode);
1894         device_remove_file(dev, &dev_attr_coordinate_mode);
1895         device_remove_file(dev, &dev_attr_tool_mode);
1896         device_remove_file(dev, &dev_attr_xtilt);
1897         device_remove_file(dev, &dev_attr_ytilt);
1898         device_remove_file(dev, &dev_attr_jitter);
1899         device_remove_file(dev, &dev_attr_delay);
1900         device_remove_file(dev, &dev_attr_input_path);
1901         device_remove_file(dev, &dev_attr_event_count);
1902         device_remove_file(dev, &dev_attr_diagnostic);
1903         device_remove_file(dev, &dev_attr_odm_code);
1904         device_remove_file(dev, &dev_attr_model_code);
1905         device_remove_file(dev, &dev_attr_firmware_code);
1906         device_remove_file(dev, &dev_attr_stylus_lower);
1907         device_remove_file(dev, &dev_attr_stylus_upper);
1908         device_remove_file(dev, &dev_attr_mouse_left);
1909         device_remove_file(dev, &dev_attr_mouse_middle);
1910         device_remove_file(dev, &dev_attr_mouse_right);
1911         device_remove_file(dev, &dev_attr_wheel);
1912         device_remove_file(dev, &dev_attr_execute);
1913 }
1914
1915 /***********************************************************************
1916  * This routine creates the sysfs files managed by this device
1917  * driver.
1918  */
1919 static int aiptek_add_files(struct device *dev)
1920 {
1921         int ret;
1922
1923         if ((ret = device_create_file(dev, &dev_attr_size)) ||
1924             (ret = device_create_file(dev, &dev_attr_product_id)) ||
1925             (ret = device_create_file(dev, &dev_attr_vendor_id)) ||
1926             (ret = device_create_file(dev, &dev_attr_vendor)) ||
1927             (ret = device_create_file(dev, &dev_attr_product)) ||
1928             (ret = device_create_file(dev, &dev_attr_pointer_mode)) ||
1929             (ret = device_create_file(dev, &dev_attr_coordinate_mode)) ||
1930             (ret = device_create_file(dev, &dev_attr_tool_mode)) ||
1931             (ret = device_create_file(dev, &dev_attr_xtilt)) ||
1932             (ret = device_create_file(dev, &dev_attr_ytilt)) ||
1933             (ret = device_create_file(dev, &dev_attr_jitter)) ||
1934             (ret = device_create_file(dev, &dev_attr_delay)) ||
1935             (ret = device_create_file(dev, &dev_attr_input_path)) ||
1936             (ret = device_create_file(dev, &dev_attr_event_count)) ||
1937             (ret = device_create_file(dev, &dev_attr_diagnostic)) ||
1938             (ret = device_create_file(dev, &dev_attr_odm_code)) ||
1939             (ret = device_create_file(dev, &dev_attr_model_code)) ||
1940             (ret = device_create_file(dev, &dev_attr_firmware_code)) ||
1941             (ret = device_create_file(dev, &dev_attr_stylus_lower)) ||
1942             (ret = device_create_file(dev, &dev_attr_stylus_upper)) ||
1943             (ret = device_create_file(dev, &dev_attr_mouse_left)) ||
1944             (ret = device_create_file(dev, &dev_attr_mouse_middle)) ||
1945             (ret = device_create_file(dev, &dev_attr_mouse_right)) ||
1946             (ret = device_create_file(dev, &dev_attr_wheel)) ||
1947             (ret = device_create_file(dev, &dev_attr_execute))) {
1948                 err("aiptek: killing own sysfs device files\n");
1949                 aiptek_delete_files(dev);
1950         }
1951         return ret;
1952 }
1953
1954 /***********************************************************************
1955  * This routine is called when a tablet has been identified. It basically
1956  * sets up the tablet and the driver's internal structures.
1957  */
1958 static int
1959 aiptek_probe(struct usb_interface *intf, const struct usb_device_id *id)
1960 {
1961         struct usb_device *usbdev = interface_to_usbdev(intf);
1962         struct usb_endpoint_descriptor *endpoint;
1963         struct aiptek *aiptek;
1964         struct input_dev *inputdev;
1965         struct input_handle *inputhandle;
1966         struct list_head *node, *next;
1967         int i;
1968         int speeds[] = { 0,
1969                 AIPTEK_PROGRAMMABLE_DELAY_50,
1970                 AIPTEK_PROGRAMMABLE_DELAY_400,
1971                 AIPTEK_PROGRAMMABLE_DELAY_25,
1972                 AIPTEK_PROGRAMMABLE_DELAY_100,
1973                 AIPTEK_PROGRAMMABLE_DELAY_200,
1974                 AIPTEK_PROGRAMMABLE_DELAY_300
1975         };
1976
1977         /* programmableDelay is where the command-line specified
1978          * delay is kept. We make it the first element of speeds[],
1979          * so therefore, your override speed is tried first, then the
1980          * remainder. Note that the default value of 400ms will be tried
1981          * if you do not specify any command line parameter.
1982          */
1983         speeds[0] = programmableDelay;
1984
1985         aiptek = kzalloc(sizeof(struct aiptek), GFP_KERNEL);
1986         inputdev = input_allocate_device();
1987         if (!aiptek || !inputdev)
1988                 goto fail1;
1989
1990         aiptek->data = usb_buffer_alloc(usbdev, AIPTEK_PACKET_LENGTH,
1991                                         GFP_ATOMIC, &aiptek->data_dma);
1992         if (!aiptek->data)
1993                 goto fail1;
1994
1995         aiptek->urb = usb_alloc_urb(0, GFP_KERNEL);
1996         if (!aiptek->urb)
1997                 goto fail2;
1998
1999         aiptek->inputdev = inputdev;
2000         aiptek->usbdev = usbdev;
2001         aiptek->ifnum = intf->altsetting[0].desc.bInterfaceNumber;
2002         aiptek->inDelay = 0;
2003         aiptek->endDelay = 0;
2004         aiptek->previousJitterable = 0;
2005
2006         /* Set up the curSettings struct. Said struct contains the current
2007          * programmable parameters. The newSetting struct contains changes
2008          * the user makes to the settings via the sysfs interface. Those
2009          * changes are not "committed" to curSettings until the user
2010          * writes to the sysfs/.../execute file.
2011          */
2012         aiptek->curSetting.pointerMode = AIPTEK_POINTER_EITHER_MODE;
2013         aiptek->curSetting.coordinateMode = AIPTEK_COORDINATE_ABSOLUTE_MODE;
2014         aiptek->curSetting.toolMode = AIPTEK_TOOL_BUTTON_PEN_MODE;
2015         aiptek->curSetting.xTilt = AIPTEK_TILT_DISABLE;
2016         aiptek->curSetting.yTilt = AIPTEK_TILT_DISABLE;
2017         aiptek->curSetting.mouseButtonLeft = AIPTEK_MOUSE_LEFT_BUTTON;
2018         aiptek->curSetting.mouseButtonMiddle = AIPTEK_MOUSE_MIDDLE_BUTTON;
2019         aiptek->curSetting.mouseButtonRight = AIPTEK_MOUSE_RIGHT_BUTTON;
2020         aiptek->curSetting.stylusButtonUpper = AIPTEK_STYLUS_UPPER_BUTTON;
2021         aiptek->curSetting.stylusButtonLower = AIPTEK_STYLUS_LOWER_BUTTON;
2022         aiptek->curSetting.jitterDelay = jitterDelay;
2023         aiptek->curSetting.programmableDelay = programmableDelay;
2024
2025         /* Both structs should have equivalent settings
2026          */
2027         aiptek->newSetting = aiptek->curSetting;
2028
2029         /* Determine the usb devices' physical path.
2030          * Asketh not why we always pretend we're using "../input0",
2031          * but I suspect this will have to be refactored one
2032          * day if a single USB device can be a keyboard & a mouse
2033          * & a tablet, and the inputX number actually will tell
2034          * us something...
2035          */
2036         usb_make_path(usbdev, aiptek->features.usbPath,
2037                         sizeof(aiptek->features.usbPath));
2038         strlcat(aiptek->features.usbPath, "/input0",
2039                 sizeof(aiptek->features.usbPath));
2040
2041         /* Set up client data, pointers to open and close routines
2042          * for the input device.
2043          */
2044         inputdev->name = "Aiptek";
2045         inputdev->phys = aiptek->features.usbPath;
2046         usb_to_input_id(usbdev, &inputdev->id);
2047         inputdev->cdev.dev = &intf->dev;
2048         inputdev->private = aiptek;
2049         inputdev->open = aiptek_open;
2050         inputdev->close = aiptek_close;
2051
2052         /* Now program the capacities of the tablet, in terms of being
2053          * an input device.
2054          */
2055         inputdev->evbit[0] |= BIT(EV_KEY)
2056             | BIT(EV_ABS)
2057             | BIT(EV_REL)
2058             | BIT(EV_MSC);
2059
2060         inputdev->absbit[0] |= BIT(ABS_MISC);
2061
2062         inputdev->relbit[0] |=
2063             (BIT(REL_X) | BIT(REL_Y) | BIT(REL_WHEEL) | BIT(REL_MISC));
2064
2065         inputdev->keybit[LONG(BTN_LEFT)] |=
2066             (BIT(BTN_LEFT) | BIT(BTN_RIGHT) | BIT(BTN_MIDDLE));
2067
2068         inputdev->keybit[LONG(BTN_DIGI)] |=
2069             (BIT(BTN_TOOL_PEN) |
2070              BIT(BTN_TOOL_RUBBER) |
2071              BIT(BTN_TOOL_PENCIL) |
2072              BIT(BTN_TOOL_AIRBRUSH) |
2073              BIT(BTN_TOOL_BRUSH) |
2074              BIT(BTN_TOOL_MOUSE) |
2075              BIT(BTN_TOOL_LENS) |
2076              BIT(BTN_TOUCH) | BIT(BTN_STYLUS) | BIT(BTN_STYLUS2));
2077
2078         inputdev->mscbit[0] = BIT(MSC_SERIAL);
2079
2080         /* Programming the tablet macro keys needs to be done with a for loop
2081          * as the keycodes are discontiguous.
2082          */
2083         for (i = 0; i < ARRAY_SIZE(macroKeyEvents); ++i)
2084                 set_bit(macroKeyEvents[i], inputdev->keybit);
2085
2086         /*
2087          * Program the input device coordinate capacities. We do not yet
2088          * know what maximum X, Y, and Z values are, so we're putting fake
2089          * values in. Later, we'll ask the tablet to put in the correct
2090          * values.
2091          */
2092         input_set_abs_params(inputdev, ABS_X, 0, 2999, 0, 0);
2093         input_set_abs_params(inputdev, ABS_Y, 0, 2249, 0, 0);
2094         input_set_abs_params(inputdev, ABS_PRESSURE, 0, 511, 0, 0);
2095         input_set_abs_params(inputdev, ABS_TILT_X, AIPTEK_TILT_MIN, AIPTEK_TILT_MAX, 0, 0);
2096         input_set_abs_params(inputdev, ABS_TILT_Y, AIPTEK_TILT_MIN, AIPTEK_TILT_MAX, 0, 0);
2097         input_set_abs_params(inputdev, ABS_WHEEL, AIPTEK_WHEEL_MIN, AIPTEK_WHEEL_MAX - 1, 0, 0);
2098
2099         endpoint = &intf->altsetting[0].endpoint[0].desc;
2100
2101         /* Go set up our URB, which is called when the tablet receives
2102          * input.
2103          */
2104         usb_fill_int_urb(aiptek->urb,
2105                          aiptek->usbdev,
2106                          usb_rcvintpipe(aiptek->usbdev,
2107                                         endpoint->bEndpointAddress),
2108                          aiptek->data, 8, aiptek_irq, aiptek,
2109                          endpoint->bInterval);
2110
2111         aiptek->urb->transfer_dma = aiptek->data_dma;
2112         aiptek->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
2113
2114         /* Program the tablet. This sets the tablet up in the mode
2115          * specified in newSetting, and also queries the tablet's
2116          * physical capacities.
2117          *
2118          * Sanity check: if a tablet doesn't like the slow programmatic
2119          * delay, we often get sizes of 0x0. Let's use that as an indicator
2120          * to try faster delays, up to 25 ms. If that logic fails, well, you'll
2121          * have to explain to us how your tablet thinks it's 0x0, and yet that's
2122          * not an error :-)
2123          */
2124
2125         for (i = 0; i < ARRAY_SIZE(speeds); ++i) {
2126                 aiptek->curSetting.programmableDelay = speeds[i];
2127                 (void)aiptek_program_tablet(aiptek);
2128                 if (aiptek->inputdev->absmax[ABS_X] > 0) {
2129                         info("input: Aiptek using %d ms programming speed\n",
2130                              aiptek->curSetting.programmableDelay);
2131                         break;
2132                 }
2133         }
2134
2135         /* Register the tablet as an Input Device
2136          */
2137         input_register_device(aiptek->inputdev);
2138
2139         /* We now will look for the evdev device which is mapped to
2140          * the tablet. The partial name is kept in the link list of
2141          * input_handles associated with this input device.
2142          * What identifies an evdev input_handler is that it begins
2143          * with 'event', continues with a digit, and that in turn
2144          * is mapped to input/eventN.
2145          */
2146         list_for_each_safe(node, next, &inputdev->h_list) {
2147                 inputhandle = to_handle(node);
2148                 if (strncmp(inputhandle->name, "event", 5) == 0) {
2149                         strcpy(aiptek->features.inputPath, inputhandle->name);
2150                         break;
2151                 }
2152         }
2153
2154         /* Associate this driver's struct with the usb interface.
2155          */
2156         usb_set_intfdata(intf, aiptek);
2157
2158         /* Set up the sysfs files
2159          */
2160         aiptek_add_files(&intf->dev);
2161
2162         /* Make sure the evdev module is loaded. Assuming evdev IS a module :-)
2163          */
2164         if (request_module("evdev") != 0)
2165                 info("aiptek: error loading 'evdev' module");
2166
2167         return 0;
2168
2169 fail2:  usb_buffer_free(usbdev, AIPTEK_PACKET_LENGTH, aiptek->data,
2170                         aiptek->data_dma);
2171 fail1:  input_free_device(inputdev);
2172         kfree(aiptek);
2173         return -ENOMEM;
2174 }
2175
2176 /* Forward declaration */
2177 static void aiptek_disconnect(struct usb_interface *intf);
2178
2179 static struct usb_driver aiptek_driver = {
2180         .name = "aiptek",
2181         .probe = aiptek_probe,
2182         .disconnect = aiptek_disconnect,
2183         .id_table = aiptek_ids,
2184 };
2185
2186 /***********************************************************************
2187  * Deal with tablet disconnecting from the system.
2188  */
2189 static void aiptek_disconnect(struct usb_interface *intf)
2190 {
2191         struct aiptek *aiptek = usb_get_intfdata(intf);
2192
2193         /* Disassociate driver's struct with usb interface
2194          */
2195         usb_set_intfdata(intf, NULL);
2196         if (aiptek != NULL) {
2197                 /* Free & unhook everything from the system.
2198                  */
2199                 usb_kill_urb(aiptek->urb);
2200                 input_unregister_device(aiptek->inputdev);
2201                 aiptek_delete_files(&intf->dev);
2202                 usb_free_urb(aiptek->urb);
2203                 usb_buffer_free(interface_to_usbdev(intf),
2204                                 AIPTEK_PACKET_LENGTH,
2205                                 aiptek->data, aiptek->data_dma);
2206                 kfree(aiptek);
2207         }
2208 }
2209
2210 static int __init aiptek_init(void)
2211 {
2212         int result = usb_register(&aiptek_driver);
2213         if (result == 0) {
2214                 info(DRIVER_VERSION ": " DRIVER_AUTHOR);
2215                 info(DRIVER_DESC);
2216         }
2217         return result;
2218 }
2219
2220 static void __exit aiptek_exit(void)
2221 {
2222         usb_deregister(&aiptek_driver);
2223 }
2224
2225 MODULE_AUTHOR(DRIVER_AUTHOR);
2226 MODULE_DESCRIPTION(DRIVER_DESC);
2227 MODULE_LICENSE("GPL");
2228
2229 module_param(programmableDelay, int, 0);
2230 MODULE_PARM_DESC(programmableDelay, "delay used during tablet programming");
2231 module_param(jitterDelay, int, 0);
2232 MODULE_PARM_DESC(jitterDelay, "stylus/mouse settlement delay");
2233
2234 module_init(aiptek_init);
2235 module_exit(aiptek_exit);