Version:  2.0.40 2.2.26 2.4.37 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17

Linux/drivers/input/tablet/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/usb/input.h>
 78 #include <asm/uaccess.h>
 79 #include <asm/unaligned.h>
 80 
 81 /*
 82  * Version Information
 83  */
 84 #define DRIVER_VERSION "v2.3 (May 2, 2007)"
 85 #define DRIVER_AUTHOR  "Bryan W. Headley/Chris Atenasio/Cedric Brun/Rene van Paassen"
 86 #define DRIVER_DESC    "Aiptek HyperPen USB Tablet Driver (Linux 2.6.x)"
 87 
 88 /*
 89  * Aiptek status packet:
 90  *
 91  * (returned as Report 1 - relative coordinates from mouse and stylus)
 92  *
 93  *        bit7  bit6  bit5  bit4  bit3  bit2  bit1  bit0
 94  * byte0   0     0     0     0     0     0     0     1
 95  * byte1   0     0     0     0     0    BS2   BS    Tip
 96  * byte2  X7    X6    X5    X4    X3    X2    X1    X0
 97  * byte3  Y7    Y6    Y5    Y4    Y3    Y2    Y1    Y0
 98  *
 99  * (returned as Report 2 - absolute coordinates from the stylus)
100  *
101  *        bit7  bit6  bit5  bit4  bit3  bit2  bit1  bit0
102  * byte0   0     0     0     0     0     0     1     0
103  * byte1  X7    X6    X5    X4    X3    X2    X1    X0
104  * byte2  X15   X14   X13   X12   X11   X10   X9    X8
105  * byte3  Y7    Y6    Y5    Y4    Y3    Y2    Y1    Y0
106  * byte4  Y15   Y14   Y13   Y12   Y11   Y10   Y9    Y8
107  * byte5   *     *     *    BS2   BS1   Tip   IR    DV
108  * byte6  P7    P6    P5    P4    P3    P2    P1    P0
109  * byte7  P15   P14   P13   P12   P11   P10   P9    P8
110  *
111  * (returned as Report 3 - absolute coordinates from the mouse)
112  *
113  *        bit7  bit6  bit5  bit4  bit3  bit2  bit1  bit0
114  * byte0   0     0     0     0     0     0     1     1
115  * byte1  X7    X6    X5    X4    X3    X2    X1    X0
116  * byte2  X15   X14   X13   X12   X11   X10   X9    X8
117  * byte3  Y7    Y6    Y5    Y4    Y3    Y2    Y1    Y0
118  * byte4  Y15   Y14   Y13   Y12   Y11   Y10   Y9    Y8
119  * byte5   *     *     *    BS2   BS1   Tip   IR    DV
120  * byte6  P7    P6    P5    P4    P3    P2    P1    P0
121  * byte7  P15   P14   P13   P12   P11   P10   P9    P8
122  *
123  * (returned as Report 4 - macrokeys from the stylus)
124  *
125  *        bit7  bit6  bit5  bit4  bit3  bit2  bit1  bit0
126  * byte0   0     0     0     0     0     1     0     0
127  * byte1   0     0     0    BS2   BS    Tip   IR    DV
128  * byte2   0     0     0     0     0     0     1     0
129  * byte3   0     0     0    K4    K3    K2    K1    K0
130  * byte4  P7    P6    P5    P4    P3    P2    P1    P0
131  * byte5  P15   P14   P13   P12   P11   P10   P9    P8
132  *
133  * (returned as Report 5 - macrokeys from the mouse)
134  *
135  *        bit7  bit6  bit5  bit4  bit3  bit2  bit1  bit0
136  * byte0   0     0     0     0     0     1     0     1
137  * byte1   0     0     0    BS2   BS    Tip   IR    DV
138  * byte2   0     0     0     0     0     0     1     0
139  * byte3   0     0     0    K4    K3    K2    K1    K0
140  * byte4  P7    P6    P5    P4    P3    P2    P1    P0
141  * byte5  P15   P14   P13   P12   P11   P10   P9    P8
142  *
143  * IR: In Range = Proximity on
144  * DV = Data Valid
145  * BS = Barrel Switch (as in, macro keys)
146  * BS2 also referred to as Tablet Pick
147  *
148  * Command Summary:
149  *
150  * Use report_type CONTROL (3)
151  * Use report_id   2
152  *
153  * Command/Data    Description     Return Bytes    Return Value
154  * 0x10/0x00       SwitchToMouse       0
155  * 0x10/0x01       SwitchToTablet      0
156  * 0x18/0x04       SetResolution       0
157  * 0x12/0xFF       AutoGainOn          0
158  * 0x17/0x00       FilterOn            0
159  * 0x01/0x00       GetXExtension       2           MaxX
160  * 0x01/0x01       GetYExtension       2           MaxY
161  * 0x02/0x00       GetModelCode        2           ModelCode = LOBYTE
162  * 0x03/0x00       GetODMCode          2           ODMCode
163  * 0x08/0x00       GetPressureLevels   2           =512
164  * 0x04/0x00       GetFirmwareVersion  2           Firmware Version
165  * 0x11/0x02       EnableMacroKeys     0
166  *
167  * To initialize the tablet:
168  *
169  * (1) Send Resolution500LPI (Command)
170  * (2) Query for Model code (Option Report)
171  * (3) Query for ODM code (Option Report)
172  * (4) Query for firmware (Option Report)
173  * (5) Query for GetXExtension (Option Report)
174  * (6) Query for GetYExtension (Option Report)
175  * (7) Query for GetPressureLevels (Option Report)
176  * (8) SwitchToTablet for Absolute coordinates, or
177  *     SwitchToMouse for Relative coordinates (Command)
178  * (9) EnableMacroKeys (Command)
179  * (10) FilterOn (Command)
180  * (11) AutoGainOn (Command)
181  *
182  * (Step 9 can be omitted, but you'll then have no function keys.)
183  */
184 
185 #define USB_VENDOR_ID_AIPTEK                            0x08ca
186 #define USB_VENDOR_ID_KYE                               0x0458
187 #define USB_REQ_GET_REPORT                              0x01
188 #define USB_REQ_SET_REPORT                              0x09
189 
190         /* PointerMode codes
191          */
192 #define AIPTEK_POINTER_ONLY_MOUSE_MODE                  0
193 #define AIPTEK_POINTER_ONLY_STYLUS_MODE                 1
194 #define AIPTEK_POINTER_EITHER_MODE                      2
195 
196 #define AIPTEK_POINTER_ALLOW_MOUSE_MODE(a)              \
197         (a == AIPTEK_POINTER_ONLY_MOUSE_MODE ||         \
198          a == AIPTEK_POINTER_EITHER_MODE)
199 #define AIPTEK_POINTER_ALLOW_STYLUS_MODE(a)             \
200         (a == AIPTEK_POINTER_ONLY_STYLUS_MODE ||        \
201          a == AIPTEK_POINTER_EITHER_MODE)
202 
203         /* CoordinateMode code
204          */
205 #define AIPTEK_COORDINATE_RELATIVE_MODE                 0
206 #define AIPTEK_COORDINATE_ABSOLUTE_MODE                 1
207 
208        /* XTilt and YTilt values
209         */
210 #define AIPTEK_TILT_MIN                                 (-128)
211 #define AIPTEK_TILT_MAX                                 127
212 #define AIPTEK_TILT_DISABLE                             (-10101)
213 
214         /* Wheel values
215          */
216 #define AIPTEK_WHEEL_MIN                                0
217 #define AIPTEK_WHEEL_MAX                                1024
218 #define AIPTEK_WHEEL_DISABLE                            (-10101)
219 
220         /* ToolCode values, which BTW are 0x140 .. 0x14f
221          * We have things set up such that if the tool button has changed,
222          * the tools get reset.
223          */
224         /* toolMode codes
225          */
226 #define AIPTEK_TOOL_BUTTON_PEN_MODE                     BTN_TOOL_PEN
227 #define AIPTEK_TOOL_BUTTON_PENCIL_MODE                  BTN_TOOL_PENCIL
228 #define AIPTEK_TOOL_BUTTON_BRUSH_MODE                   BTN_TOOL_BRUSH
229 #define AIPTEK_TOOL_BUTTON_AIRBRUSH_MODE                BTN_TOOL_AIRBRUSH
230 #define AIPTEK_TOOL_BUTTON_ERASER_MODE                  BTN_TOOL_RUBBER
231 #define AIPTEK_TOOL_BUTTON_MOUSE_MODE                   BTN_TOOL_MOUSE
232 #define AIPTEK_TOOL_BUTTON_LENS_MODE                    BTN_TOOL_LENS
233 
234         /* Diagnostic message codes
235          */
236 #define AIPTEK_DIAGNOSTIC_NA                            0
237 #define AIPTEK_DIAGNOSTIC_SENDING_RELATIVE_IN_ABSOLUTE  1
238 #define AIPTEK_DIAGNOSTIC_SENDING_ABSOLUTE_IN_RELATIVE  2
239 #define AIPTEK_DIAGNOSTIC_TOOL_DISALLOWED               3
240 
241         /* Time to wait (in ms) to help mask hand jittering
242          * when pressing the stylus buttons.
243          */
244 #define AIPTEK_JITTER_DELAY_DEFAULT                     50
245 
246         /* Time to wait (in ms) in-between sending the tablet
247          * a command and beginning the process of reading the return
248          * sequence from the tablet.
249          */
250 #define AIPTEK_PROGRAMMABLE_DELAY_25            25
251 #define AIPTEK_PROGRAMMABLE_DELAY_50            50
252 #define AIPTEK_PROGRAMMABLE_DELAY_100           100
253 #define AIPTEK_PROGRAMMABLE_DELAY_200           200
254 #define AIPTEK_PROGRAMMABLE_DELAY_300           300
255 #define AIPTEK_PROGRAMMABLE_DELAY_400           400
256 #define AIPTEK_PROGRAMMABLE_DELAY_DEFAULT       AIPTEK_PROGRAMMABLE_DELAY_400
257 
258         /* Mouse button programming
259          */
260 #define AIPTEK_MOUSE_LEFT_BUTTON                0x04
261 #define AIPTEK_MOUSE_RIGHT_BUTTON               0x08
262 #define AIPTEK_MOUSE_MIDDLE_BUTTON              0x10
263 
264         /* Stylus button programming
265          */
266 #define AIPTEK_STYLUS_LOWER_BUTTON              0x08
267 #define AIPTEK_STYLUS_UPPER_BUTTON              0x10
268 
269         /* Length of incoming packet from the tablet
270          */
271 #define AIPTEK_PACKET_LENGTH                    8
272 
273         /* We report in EV_MISC both the proximity and
274          * whether the report came from the stylus, tablet mouse
275          * or "unknown" -- Unknown when the tablet is in relative
276          * mode, because we only get report 1's.
277          */
278 #define AIPTEK_REPORT_TOOL_UNKNOWN              0x10
279 #define AIPTEK_REPORT_TOOL_STYLUS               0x20
280 #define AIPTEK_REPORT_TOOL_MOUSE                0x40
281 
282 static int programmableDelay = AIPTEK_PROGRAMMABLE_DELAY_DEFAULT;
283 static int jitterDelay = AIPTEK_JITTER_DELAY_DEFAULT;
284 
285 struct aiptek_features {
286         int odmCode;            /* Tablet manufacturer code       */
287         int modelCode;          /* Tablet model code (not unique) */
288         int firmwareCode;       /* prom/eeprom version            */
289         char usbPath[64 + 1];   /* device's physical usb path     */
290 };
291 
292 struct aiptek_settings {
293         int pointerMode;        /* stylus-, mouse-only or either */
294         int coordinateMode;     /* absolute/relative coords      */
295         int toolMode;           /* pen, pencil, brush, etc. tool */
296         int xTilt;              /* synthetic xTilt amount        */
297         int yTilt;              /* synthetic yTilt amount        */
298         int wheel;              /* synthetic wheel amount        */
299         int stylusButtonUpper;  /* stylus upper btn delivers...  */
300         int stylusButtonLower;  /* stylus lower btn delivers...  */
301         int mouseButtonLeft;    /* mouse left btn delivers...    */
302         int mouseButtonMiddle;  /* mouse middle btn delivers...  */
303         int mouseButtonRight;   /* mouse right btn delivers...   */
304         int programmableDelay;  /* delay for tablet programming  */
305         int jitterDelay;        /* delay for hand jittering      */
306 };
307 
308 struct aiptek {
309         struct input_dev *inputdev;             /* input device struct           */
310         struct usb_device *usbdev;              /* usb device struct             */
311         struct usb_interface *intf;             /* usb interface struct          */
312         struct urb *urb;                        /* urb for incoming reports      */
313         dma_addr_t data_dma;                    /* our dma stuffage              */
314         struct aiptek_features features;        /* tablet's array of features    */
315         struct aiptek_settings curSetting;      /* tablet's current programmable */
316         struct aiptek_settings newSetting;      /* ... and new param settings    */
317         unsigned int ifnum;                     /* interface number for IO       */
318         int diagnostic;                         /* tablet diagnostic codes       */
319         unsigned long eventCount;               /* event count                   */
320         int inDelay;                            /* jitter: in jitter delay?      */
321         unsigned long endDelay;                 /* jitter: time when delay ends  */
322         int previousJitterable;                 /* jitterable prev value     */
323 
324         int lastMacro;                          /* macro key to reset            */
325         int previousToolMode;                   /* pen, pencil, brush, etc. tool */
326         unsigned char *data;                    /* incoming packet data          */
327 };
328 
329 static const int eventTypes[] = {
330         EV_KEY, EV_ABS, EV_REL, EV_MSC,
331 };
332 
333 static const int absEvents[] = {
334         ABS_X, ABS_Y, ABS_PRESSURE, ABS_TILT_X, ABS_TILT_Y,
335         ABS_WHEEL, ABS_MISC,
336 };
337 
338 static const int relEvents[] = {
339         REL_X, REL_Y, REL_WHEEL,
340 };
341 
342 static const int buttonEvents[] = {
343         BTN_LEFT, BTN_RIGHT, BTN_MIDDLE,
344         BTN_TOOL_PEN, BTN_TOOL_RUBBER, BTN_TOOL_PENCIL, BTN_TOOL_AIRBRUSH,
345         BTN_TOOL_BRUSH, BTN_TOOL_MOUSE, BTN_TOOL_LENS, BTN_TOUCH,
346         BTN_STYLUS, BTN_STYLUS2,
347 };
348 
349 /*
350  * Permit easy lookup of keyboard events to send, versus
351  * the bitmap which comes from the tablet. This hides the
352  * issue that the F_keys are not sequentially numbered.
353  */
354 static const int macroKeyEvents[] = {
355         KEY_ESC, KEY_F1, KEY_F2, KEY_F3, KEY_F4, KEY_F5,
356         KEY_F6, KEY_F7, KEY_F8, KEY_F9, KEY_F10, KEY_F11,
357         KEY_F12, KEY_F13, KEY_F14, KEY_F15, KEY_F16, KEY_F17,
358         KEY_F18, KEY_F19, KEY_F20, KEY_F21, KEY_F22, KEY_F23,
359         KEY_F24, KEY_STOP, KEY_AGAIN, KEY_PROPS, KEY_UNDO,
360         KEY_FRONT, KEY_COPY, KEY_OPEN, KEY_PASTE, 0
361 };
362 
363 /***********************************************************************
364  * Map values to strings and back. Every map should have the following
365  * as its last element: { NULL, AIPTEK_INVALID_VALUE }.
366  */
367 #define AIPTEK_INVALID_VALUE    -1
368 
369 struct aiptek_map {
370         const char *string;
371         int value;
372 };
373 
374 static int map_str_to_val(const struct aiptek_map *map, const char *str, size_t count)
375 {
376         const struct aiptek_map *p;
377 
378         if (str[count - 1] == '\n')
379                 count--;
380 
381         for (p = map; p->string; p++)
382                 if (!strncmp(str, p->string, count))
383                         return p->value;
384 
385         return AIPTEK_INVALID_VALUE;
386 }
387 
388 static const char *map_val_to_str(const struct aiptek_map *map, int val)
389 {
390         const struct aiptek_map *p;
391 
392         for (p = map; p->value != AIPTEK_INVALID_VALUE; p++)
393                 if (val == p->value)
394                         return p->string;
395 
396         return "unknown";
397 }
398 
399 /***********************************************************************
400  * aiptek_irq can receive one of six potential reports.
401  * The documentation for each is in the body of the function.
402  *
403  * The tablet reports on several attributes per invocation of
404  * aiptek_irq. Because the Linux Input Event system allows the
405  * transmission of ONE attribute per input_report_xxx() call,
406  * collation has to be done on the other end to reconstitute
407  * a complete tablet report. Further, the number of Input Event reports
408  * submitted varies, depending on what USB report type, and circumstance.
409  * To deal with this, EV_MSC is used to indicate an 'end-of-report'
410  * message. This has been an undocumented convention understood by the kernel
411  * tablet driver and clients such as gpm and XFree86's tablet drivers.
412  *
413  * Of the information received from the tablet, the one piece I
414  * cannot transmit is the proximity bit (without resorting to an EV_MSC
415  * convention above.) I therefore have taken over REL_MISC and ABS_MISC
416  * (for relative and absolute reports, respectively) for communicating
417  * Proximity. Why two events? I thought it interesting to know if the
418  * Proximity event occurred while the tablet was in absolute or relative
419  * mode.
420  * Update: REL_MISC proved not to be such a good idea. With REL_MISC you
421  * get an event transmitted each time. ABS_MISC works better, since it
422  * can be set and re-set. Thus, only using ABS_MISC from now on.
423  *
424  * Other tablets use the notion of a certain minimum stylus pressure
425  * to infer proximity. While that could have been done, that is yet
426  * another 'by convention' behavior, the documentation for which
427  * would be spread between two (or more) pieces of software.
428  *
429  * EV_MSC usage was terminated for this purpose in Linux 2.5.x, and
430  * replaced with the input_sync() method (which emits EV_SYN.)
431  */
432 
433 static void aiptek_irq(struct urb *urb)
434 {
435         struct aiptek *aiptek = urb->context;
436         unsigned char *data = aiptek->data;
437         struct input_dev *inputdev = aiptek->inputdev;
438         struct usb_interface *intf = aiptek->intf;
439         int jitterable = 0;
440         int retval, macro, x, y, z, left, right, middle, p, dv, tip, bs, pck;
441 
442         switch (urb->status) {
443         case 0:
444                 /* Success */
445                 break;
446 
447         case -ECONNRESET:
448         case -ENOENT:
449         case -ESHUTDOWN:
450                 /* This urb is terminated, clean up */
451                 dev_dbg(&intf->dev, "%s - urb shutting down with status: %d\n",
452                         __func__, urb->status);
453                 return;
454 
455         default:
456                 dev_dbg(&intf->dev, "%s - nonzero urb status received: %d\n",
457                         __func__, urb->status);
458                 goto exit;
459         }
460 
461         /* See if we are in a delay loop -- throw out report if true.
462          */
463         if (aiptek->inDelay == 1 && time_after(aiptek->endDelay, jiffies)) {
464                 goto exit;
465         }
466 
467         aiptek->inDelay = 0;
468         aiptek->eventCount++;
469 
470         /* Report 1 delivers relative coordinates with either a stylus
471          * or the mouse. You do not know, however, which input
472          * tool generated the event.
473          */
474         if (data[0] == 1) {
475                 if (aiptek->curSetting.coordinateMode ==
476                     AIPTEK_COORDINATE_ABSOLUTE_MODE) {
477                         aiptek->diagnostic =
478                             AIPTEK_DIAGNOSTIC_SENDING_RELATIVE_IN_ABSOLUTE;
479                 } else {
480                         x = (signed char) data[2];
481                         y = (signed char) data[3];
482 
483                         /* jitterable keeps track of whether any button has been pressed.
484                          * We're also using it to remap the physical mouse button mask
485                          * to pseudo-settings. (We don't specifically care about it's
486                          * value after moving/transposing mouse button bitmasks, except
487                          * that a non-zero value indicates that one or more
488                          * mouse button was pressed.)
489                          */
490                         jitterable = data[1] & 0x07;
491 
492                         left = (data[1] & aiptek->curSetting.mouseButtonLeft >> 2) != 0 ? 1 : 0;
493                         right = (data[1] & aiptek->curSetting.mouseButtonRight >> 2) != 0 ? 1 : 0;
494                         middle = (data[1] & aiptek->curSetting.mouseButtonMiddle >> 2) != 0 ? 1 : 0;
495 
496                         input_report_key(inputdev, BTN_LEFT, left);
497                         input_report_key(inputdev, BTN_MIDDLE, middle);
498                         input_report_key(inputdev, BTN_RIGHT, right);
499 
500                         input_report_abs(inputdev, ABS_MISC,
501                                          1 | AIPTEK_REPORT_TOOL_UNKNOWN);
502                         input_report_rel(inputdev, REL_X, x);
503                         input_report_rel(inputdev, REL_Y, y);
504 
505                         /* Wheel support is in the form of a single-event
506                          * firing.
507                          */
508                         if (aiptek->curSetting.wheel != AIPTEK_WHEEL_DISABLE) {
509                                 input_report_rel(inputdev, REL_WHEEL,
510                                                  aiptek->curSetting.wheel);
511                                 aiptek->curSetting.wheel = AIPTEK_WHEEL_DISABLE;
512                         }
513                         if (aiptek->lastMacro != -1) {
514                                 input_report_key(inputdev,
515                                                  macroKeyEvents[aiptek->lastMacro], 0);
516                                 aiptek->lastMacro = -1;
517                         }
518                         input_sync(inputdev);
519                 }
520         }
521         /* Report 2 is delivered only by the stylus, and delivers
522          * absolute coordinates.
523          */
524         else if (data[0] == 2) {
525                 if (aiptek->curSetting.coordinateMode == AIPTEK_COORDINATE_RELATIVE_MODE) {
526                         aiptek->diagnostic = AIPTEK_DIAGNOSTIC_SENDING_ABSOLUTE_IN_RELATIVE;
527                 } else if (!AIPTEK_POINTER_ALLOW_STYLUS_MODE
528                             (aiptek->curSetting.pointerMode)) {
529                                 aiptek->diagnostic = AIPTEK_DIAGNOSTIC_TOOL_DISALLOWED;
530                 } else {
531                         x = get_unaligned_le16(data + 1);
532                         y = get_unaligned_le16(data + 3);
533                         z = get_unaligned_le16(data + 6);
534 
535                         dv = (data[5] & 0x01) != 0 ? 1 : 0;
536                         p = (data[5] & 0x02) != 0 ? 1 : 0;
537                         tip = (data[5] & 0x04) != 0 ? 1 : 0;
538 
539                         /* Use jitterable to re-arrange button masks
540                          */
541                         jitterable = data[5] & 0x18;
542 
543                         bs = (data[5] & aiptek->curSetting.stylusButtonLower) != 0 ? 1 : 0;
544                         pck = (data[5] & aiptek->curSetting.stylusButtonUpper) != 0 ? 1 : 0;
545 
546                         /* dv indicates 'data valid' (e.g., the tablet is in sync
547                          * and has delivered a "correct" report) We will ignore
548                          * all 'bad' reports...
549                          */
550                         if (dv != 0) {
551                                 /* If the selected tool changed, reset the old
552                                  * tool key, and set the new one.
553                                  */
554                                 if (aiptek->previousToolMode !=
555                                     aiptek->curSetting.toolMode) {
556                                         input_report_key(inputdev,
557                                                          aiptek->previousToolMode, 0);
558                                         input_report_key(inputdev,
559                                                          aiptek->curSetting.toolMode,
560                                                          1);
561                                         aiptek->previousToolMode =
562                                                   aiptek->curSetting.toolMode;
563                                 }
564 
565                                 if (p != 0) {
566                                         input_report_abs(inputdev, ABS_X, x);
567                                         input_report_abs(inputdev, ABS_Y, y);
568                                         input_report_abs(inputdev, ABS_PRESSURE, z);
569 
570                                         input_report_key(inputdev, BTN_TOUCH, tip);
571                                         input_report_key(inputdev, BTN_STYLUS, bs);
572                                         input_report_key(inputdev, BTN_STYLUS2, pck);
573 
574                                         if (aiptek->curSetting.xTilt !=
575                                             AIPTEK_TILT_DISABLE) {
576                                                 input_report_abs(inputdev,
577                                                                  ABS_TILT_X,
578                                                                  aiptek->curSetting.xTilt);
579                                         }
580                                         if (aiptek->curSetting.yTilt != AIPTEK_TILT_DISABLE) {
581                                                 input_report_abs(inputdev,
582                                                                  ABS_TILT_Y,
583                                                                  aiptek->curSetting.yTilt);
584                                         }
585 
586                                         /* Wheel support is in the form of a single-event
587                                          * firing.
588                                          */
589                                         if (aiptek->curSetting.wheel !=
590                                             AIPTEK_WHEEL_DISABLE) {
591                                                 input_report_abs(inputdev,
592                                                                  ABS_WHEEL,
593                                                                  aiptek->curSetting.wheel);
594                                                 aiptek->curSetting.wheel = AIPTEK_WHEEL_DISABLE;
595                                         }
596                                 }
597                                 input_report_abs(inputdev, ABS_MISC, p | AIPTEK_REPORT_TOOL_STYLUS);
598                                 if (aiptek->lastMacro != -1) {
599                                         input_report_key(inputdev,
600                                                          macroKeyEvents[aiptek->lastMacro], 0);
601                                         aiptek->lastMacro = -1;
602                                 }
603                                 input_sync(inputdev);
604                         }
605                 }
606         }
607         /* Report 3's come from the mouse in absolute mode.
608          */
609         else if (data[0] == 3) {
610                 if (aiptek->curSetting.coordinateMode == AIPTEK_COORDINATE_RELATIVE_MODE) {
611                         aiptek->diagnostic = AIPTEK_DIAGNOSTIC_SENDING_ABSOLUTE_IN_RELATIVE;
612                 } else if (!AIPTEK_POINTER_ALLOW_MOUSE_MODE
613                         (aiptek->curSetting.pointerMode)) {
614                         aiptek->diagnostic = AIPTEK_DIAGNOSTIC_TOOL_DISALLOWED;
615                 } else {
616                         x = get_unaligned_le16(data + 1);
617                         y = get_unaligned_le16(data + 3);
618 
619                         jitterable = data[5] & 0x1c;
620 
621                         dv = (data[5] & 0x01) != 0 ? 1 : 0;
622                         p = (data[5] & 0x02) != 0 ? 1 : 0;
623                         left = (data[5] & aiptek->curSetting.mouseButtonLeft) != 0 ? 1 : 0;
624                         right = (data[5] & aiptek->curSetting.mouseButtonRight) != 0 ? 1 : 0;
625                         middle = (data[5] & aiptek->curSetting.mouseButtonMiddle) != 0 ? 1 : 0;
626 
627                         if (dv != 0) {
628                                 /* If the selected tool changed, reset the old
629                                  * tool key, and set the new one.
630                                  */
631                                 if (aiptek->previousToolMode !=
632                                     aiptek->curSetting.toolMode) {
633                                         input_report_key(inputdev,
634                                                          aiptek->previousToolMode, 0);
635                                         input_report_key(inputdev,
636                                                          aiptek->curSetting.toolMode,
637                                                          1);
638                                         aiptek->previousToolMode =
639                                                   aiptek->curSetting.toolMode;
640                                 }
641 
642                                 if (p != 0) {
643                                         input_report_abs(inputdev, ABS_X, x);
644                                         input_report_abs(inputdev, ABS_Y, y);
645 
646                                         input_report_key(inputdev, BTN_LEFT, left);
647                                         input_report_key(inputdev, BTN_MIDDLE, middle);
648                                         input_report_key(inputdev, BTN_RIGHT, right);
649 
650                                         /* Wheel support is in the form of a single-event
651                                          * firing.
652                                          */
653                                         if (aiptek->curSetting.wheel != AIPTEK_WHEEL_DISABLE) {
654                                                 input_report_abs(inputdev,
655                                                                  ABS_WHEEL,
656                                                                  aiptek->curSetting.wheel);
657                                                 aiptek->curSetting.wheel = AIPTEK_WHEEL_DISABLE;
658                                         }
659                                 }
660                                 input_report_abs(inputdev, ABS_MISC, p | AIPTEK_REPORT_TOOL_MOUSE);
661                                 if (aiptek->lastMacro != -1) {
662                                         input_report_key(inputdev,
663                                                          macroKeyEvents[aiptek->lastMacro], 0);
664                                         aiptek->lastMacro = -1;
665                                 }
666                                 input_sync(inputdev);
667                         }
668                 }
669         }
670         /* Report 4s come from the macro keys when pressed by stylus
671          */
672         else if (data[0] == 4) {
673                 jitterable = data[1] & 0x18;
674 
675                 dv = (data[1] & 0x01) != 0 ? 1 : 0;
676                 p = (data[1] & 0x02) != 0 ? 1 : 0;
677                 tip = (data[1] & 0x04) != 0 ? 1 : 0;
678                 bs = (data[1] & aiptek->curSetting.stylusButtonLower) != 0 ? 1 : 0;
679                 pck = (data[1] & aiptek->curSetting.stylusButtonUpper) != 0 ? 1 : 0;
680 
681                 macro = dv && p && tip && !(data[3] & 1) ? (data[3] >> 1) : -1;
682                 z = get_unaligned_le16(data + 4);
683 
684                 if (dv) {
685                         /* If the selected tool changed, reset the old
686                          * tool key, and set the new one.
687                          */
688                         if (aiptek->previousToolMode !=
689                             aiptek->curSetting.toolMode) {
690                                 input_report_key(inputdev,
691                                                  aiptek->previousToolMode, 0);
692                                 input_report_key(inputdev,
693                                                  aiptek->curSetting.toolMode,
694                                                  1);
695                                 aiptek->previousToolMode =
696                                         aiptek->curSetting.toolMode;
697                         }
698                 }
699 
700                 if (aiptek->lastMacro != -1 && aiptek->lastMacro != macro) {
701                         input_report_key(inputdev, macroKeyEvents[aiptek->lastMacro], 0);
702                         aiptek->lastMacro = -1;
703                 }
704 
705                 if (macro != -1 && macro != aiptek->lastMacro) {
706                         input_report_key(inputdev, macroKeyEvents[macro], 1);
707                         aiptek->lastMacro = macro;
708                 }
709                 input_report_abs(inputdev, ABS_MISC,
710                                  p | AIPTEK_REPORT_TOOL_STYLUS);
711                 input_sync(inputdev);
712         }
713         /* Report 5s come from the macro keys when pressed by mouse
714          */
715         else if (data[0] == 5) {
716                 jitterable = data[1] & 0x1c;
717 
718                 dv = (data[1] & 0x01) != 0 ? 1 : 0;
719                 p = (data[1] & 0x02) != 0 ? 1 : 0;
720                 left = (data[1]& aiptek->curSetting.mouseButtonLeft) != 0 ? 1 : 0;
721                 right = (data[1] & aiptek->curSetting.mouseButtonRight) != 0 ? 1 : 0;
722                 middle = (data[1] & aiptek->curSetting.mouseButtonMiddle) != 0 ? 1 : 0;
723                 macro = dv && p && left && !(data[3] & 1) ? (data[3] >> 1) : 0;
724 
725                 if (dv) {
726                         /* If the selected tool changed, reset the old
727                          * tool key, and set the new one.
728                          */
729                         if (aiptek->previousToolMode !=
730                             aiptek->curSetting.toolMode) {
731                                 input_report_key(inputdev,
732                                                  aiptek->previousToolMode, 0);
733                                 input_report_key(inputdev,
734                                                  aiptek->curSetting.toolMode, 1);
735                                 aiptek->previousToolMode = aiptek->curSetting.toolMode;
736                         }
737                 }
738 
739                 if (aiptek->lastMacro != -1 && aiptek->lastMacro != macro) {
740                         input_report_key(inputdev, macroKeyEvents[aiptek->lastMacro], 0);
741                         aiptek->lastMacro = -1;
742                 }
743 
744                 if (macro != -1 && macro != aiptek->lastMacro) {
745                         input_report_key(inputdev, macroKeyEvents[macro], 1);
746                         aiptek->lastMacro = macro;
747                 }
748 
749                 input_report_abs(inputdev, ABS_MISC,
750                                  p | AIPTEK_REPORT_TOOL_MOUSE);
751                 input_sync(inputdev);
752         }
753         /* We have no idea which tool can generate a report 6. Theoretically,
754          * neither need to, having been given reports 4 & 5 for such use.
755          * However, report 6 is the 'official-looking' report for macroKeys;
756          * reports 4 & 5 supposively are used to support unnamed, unknown
757          * hat switches (which just so happen to be the macroKeys.)
758          */
759         else if (data[0] == 6) {
760                 macro = get_unaligned_le16(data + 1);
761                 if (macro > 0) {
762                         input_report_key(inputdev, macroKeyEvents[macro - 1],
763                                          0);
764                 }
765                 if (macro < 25) {
766                         input_report_key(inputdev, macroKeyEvents[macro + 1],
767                                          0);
768                 }
769 
770                 /* If the selected tool changed, reset the old
771                    tool key, and set the new one.
772                 */
773                 if (aiptek->previousToolMode !=
774                     aiptek->curSetting.toolMode) {
775                         input_report_key(inputdev,
776                                          aiptek->previousToolMode, 0);
777                         input_report_key(inputdev,
778                                          aiptek->curSetting.toolMode,
779                                          1);
780                         aiptek->previousToolMode =
781                                 aiptek->curSetting.toolMode;
782                 }
783 
784                 input_report_key(inputdev, macroKeyEvents[macro], 1);
785                 input_report_abs(inputdev, ABS_MISC,
786                                  1 | AIPTEK_REPORT_TOOL_UNKNOWN);
787                 input_sync(inputdev);
788         } else {
789                 dev_dbg(&intf->dev, "Unknown report %d\n", data[0]);
790         }
791 
792         /* Jitter may occur when the user presses a button on the stlyus
793          * or the mouse. What we do to prevent that is wait 'x' milliseconds
794          * following a 'jitterable' event, which should give the hand some time
795          * stabilize itself.
796          *
797          * We just introduced aiptek->previousJitterable to carry forth the
798          * notion that jitter occurs when the button state changes from on to off:
799          * a person drawing, holding a button down is not subject to jittering.
800          * With that in mind, changing from upper button depressed to lower button
801          * WILL transition through a jitter delay.
802          */
803 
804         if (aiptek->previousJitterable != jitterable &&
805             aiptek->curSetting.jitterDelay != 0 && aiptek->inDelay != 1) {
806                 aiptek->endDelay = jiffies +
807                     ((aiptek->curSetting.jitterDelay * HZ) / 1000);
808                 aiptek->inDelay = 1;
809         }
810         aiptek->previousJitterable = jitterable;
811 
812 exit:
813         retval = usb_submit_urb(urb, GFP_ATOMIC);
814         if (retval != 0) {
815                 dev_err(&intf->dev,
816                         "%s - usb_submit_urb failed with result %d\n",
817                         __func__, retval);
818         }
819 }
820 
821 /***********************************************************************
822  * These are the USB id's known so far. We do not identify them to
823  * specific Aiptek model numbers, because there has been overlaps,
824  * use, and reuse of id's in existing models. Certain models have
825  * been known to use more than one ID, indicative perhaps of
826  * manufacturing revisions. In any event, we consider these
827  * IDs to not be model-specific nor unique.
828  */
829 static const struct usb_device_id aiptek_ids[] = {
830         {USB_DEVICE(USB_VENDOR_ID_AIPTEK, 0x01)},
831         {USB_DEVICE(USB_VENDOR_ID_AIPTEK, 0x10)},
832         {USB_DEVICE(USB_VENDOR_ID_AIPTEK, 0x20)},
833         {USB_DEVICE(USB_VENDOR_ID_AIPTEK, 0x21)},
834         {USB_DEVICE(USB_VENDOR_ID_AIPTEK, 0x22)},
835         {USB_DEVICE(USB_VENDOR_ID_AIPTEK, 0x23)},
836         {USB_DEVICE(USB_VENDOR_ID_AIPTEK, 0x24)},
837         {USB_DEVICE(USB_VENDOR_ID_KYE, 0x5003)},
838         {}
839 };
840 
841 MODULE_DEVICE_TABLE(usb, aiptek_ids);
842 
843 /***********************************************************************
844  * Open an instance of the tablet driver.
845  */
846 static int aiptek_open(struct input_dev *inputdev)
847 {
848         struct aiptek *aiptek = input_get_drvdata(inputdev);
849 
850         aiptek->urb->dev = aiptek->usbdev;
851         if (usb_submit_urb(aiptek->urb, GFP_KERNEL) != 0)
852                 return -EIO;
853 
854         return 0;
855 }
856 
857 /***********************************************************************
858  * Close an instance of the tablet driver.
859  */
860 static void aiptek_close(struct input_dev *inputdev)
861 {
862         struct aiptek *aiptek = input_get_drvdata(inputdev);
863 
864         usb_kill_urb(aiptek->urb);
865 }
866 
867 /***********************************************************************
868  * aiptek_set_report and aiptek_get_report() are borrowed from Linux 2.4.x,
869  * where they were known as usb_set_report and usb_get_report.
870  */
871 static int
872 aiptek_set_report(struct aiptek *aiptek,
873                   unsigned char report_type,
874                   unsigned char report_id, void *buffer, int size)
875 {
876         return usb_control_msg(aiptek->usbdev,
877                                usb_sndctrlpipe(aiptek->usbdev, 0),
878                                USB_REQ_SET_REPORT,
879                                USB_TYPE_CLASS | USB_RECIP_INTERFACE |
880                                USB_DIR_OUT, (report_type << 8) + report_id,
881                                aiptek->ifnum, buffer, size, 5000);
882 }
883 
884 static int
885 aiptek_get_report(struct aiptek *aiptek,
886                   unsigned char report_type,
887                   unsigned char report_id, void *buffer, int size)
888 {
889         return usb_control_msg(aiptek->usbdev,
890                                usb_rcvctrlpipe(aiptek->usbdev, 0),
891                                USB_REQ_GET_REPORT,
892                                USB_TYPE_CLASS | USB_RECIP_INTERFACE |
893                                USB_DIR_IN, (report_type << 8) + report_id,
894                                aiptek->ifnum, buffer, size, 5000);
895 }
896 
897 /***********************************************************************
898  * Send a command to the tablet.
899  */
900 static int
901 aiptek_command(struct aiptek *aiptek, unsigned char command, unsigned char data)
902 {
903         const int sizeof_buf = 3 * sizeof(u8);
904         int ret;
905         u8 *buf;
906 
907         buf = kmalloc(sizeof_buf, GFP_KERNEL);
908         if (!buf)
909                 return -ENOMEM;
910 
911         buf[0] = 2;
912         buf[1] = command;
913         buf[2] = data;
914 
915         if ((ret =
916              aiptek_set_report(aiptek, 3, 2, buf, sizeof_buf)) != sizeof_buf) {
917                 dev_dbg(&aiptek->intf->dev,
918                         "aiptek_program: failed, tried to send: 0x%02x 0x%02x\n",
919                         command, data);
920         }
921         kfree(buf);
922         return ret < 0 ? ret : 0;
923 }
924 
925 /***********************************************************************
926  * Retrieve information from the tablet. Querying info is defined as first
927  * sending the {command,data} sequence as a command, followed by a wait
928  * (aka, "programmaticDelay") and then a "read" request.
929  */
930 static int
931 aiptek_query(struct aiptek *aiptek, unsigned char command, unsigned char data)
932 {
933         const int sizeof_buf = 3 * sizeof(u8);
934         int ret;
935         u8 *buf;
936 
937         buf = kmalloc(sizeof_buf, GFP_KERNEL);
938         if (!buf)
939                 return -ENOMEM;
940 
941         buf[0] = 2;
942         buf[1] = command;
943         buf[2] = data;
944 
945         if (aiptek_command(aiptek, command, data) != 0) {
946                 kfree(buf);
947                 return -EIO;
948         }
949         msleep(aiptek->curSetting.programmableDelay);
950 
951         if ((ret =
952              aiptek_get_report(aiptek, 3, 2, buf, sizeof_buf)) != sizeof_buf) {
953                 dev_dbg(&aiptek->intf->dev,
954                         "aiptek_query failed: returned 0x%02x 0x%02x 0x%02x\n",
955                         buf[0], buf[1], buf[2]);
956                 ret = -EIO;
957         } else {
958                 ret = get_unaligned_le16(buf + 1);
959         }
960         kfree(buf);
961         return ret;
962 }
963 
964 /***********************************************************************
965  * Program the tablet into either absolute or relative mode.
966  * We also get information about the tablet's size.
967  */
968 static int aiptek_program_tablet(struct aiptek *aiptek)
969 {
970         int ret;
971         /* Execute Resolution500LPI */
972         if ((ret = aiptek_command(aiptek, 0x18, 0x04)) < 0)
973                 return ret;
974 
975         /* Query getModelCode */
976         if ((ret = aiptek_query(aiptek, 0x02, 0x00)) < 0)
977                 return ret;
978         aiptek->features.modelCode = ret & 0xff;
979 
980         /* Query getODMCode */
981         if ((ret = aiptek_query(aiptek, 0x03, 0x00)) < 0)
982                 return ret;
983         aiptek->features.odmCode = ret;
984 
985         /* Query getFirmwareCode */
986         if ((ret = aiptek_query(aiptek, 0x04, 0x00)) < 0)
987                 return ret;
988         aiptek->features.firmwareCode = ret;
989 
990         /* Query getXextension */
991         if ((ret = aiptek_query(aiptek, 0x01, 0x00)) < 0)
992                 return ret;
993         input_set_abs_params(aiptek->inputdev, ABS_X, 0, ret - 1, 0, 0);
994 
995         /* Query getYextension */
996         if ((ret = aiptek_query(aiptek, 0x01, 0x01)) < 0)
997                 return ret;
998         input_set_abs_params(aiptek->inputdev, ABS_Y, 0, ret - 1, 0, 0);
999 
1000         /* Query getPressureLevels */
1001         if ((ret = aiptek_query(aiptek, 0x08, 0x00)) < 0)
1002                 return ret;
1003         input_set_abs_params(aiptek->inputdev, ABS_PRESSURE, 0, ret - 1, 0, 0);
1004 
1005         /* Depending on whether we are in absolute or relative mode, we will
1006          * do a switchToTablet(absolute) or switchToMouse(relative) command.
1007          */
1008         if (aiptek->curSetting.coordinateMode ==
1009             AIPTEK_COORDINATE_ABSOLUTE_MODE) {
1010                 /* Execute switchToTablet */
1011                 if ((ret = aiptek_command(aiptek, 0x10, 0x01)) < 0) {
1012                         return ret;
1013                 }
1014         } else {
1015                 /* Execute switchToMouse */
1016                 if ((ret = aiptek_command(aiptek, 0x10, 0x00)) < 0) {
1017                         return ret;
1018                 }
1019         }
1020 
1021         /* Enable the macro keys */
1022         if ((ret = aiptek_command(aiptek, 0x11, 0x02)) < 0)
1023                 return ret;
1024 #if 0
1025         /* Execute FilterOn */
1026         if ((ret = aiptek_command(aiptek, 0x17, 0x00)) < 0)
1027                 return ret;
1028 #endif
1029 
1030         /* Execute AutoGainOn */
1031         if ((ret = aiptek_command(aiptek, 0x12, 0xff)) < 0)
1032                 return ret;
1033 
1034         /* Reset the eventCount, so we track events from last (re)programming
1035          */
1036         aiptek->diagnostic = AIPTEK_DIAGNOSTIC_NA;
1037         aiptek->eventCount = 0;
1038 
1039         return 0;
1040 }
1041 
1042 /***********************************************************************
1043  * Sysfs functions. Sysfs prefers that individually-tunable parameters
1044  * exist in their separate pseudo-files. Summary data that is immutable
1045  * may exist in a singular file so long as you don't define a writeable
1046  * interface.
1047  */
1048 
1049 /***********************************************************************
1050  * support the 'size' file -- display support
1051  */
1052 static ssize_t show_tabletSize(struct device *dev, struct device_attribute *attr, char *buf)
1053 {
1054         struct aiptek *aiptek = dev_get_drvdata(dev);
1055 
1056         return snprintf(buf, PAGE_SIZE, "%dx%d\n",
1057                         input_abs_get_max(aiptek->inputdev, ABS_X) + 1,
1058                         input_abs_get_max(aiptek->inputdev, ABS_Y) + 1);
1059 }
1060 
1061 /* These structs define the sysfs files, param #1 is the name of the
1062  * file, param 2 is the file permissions, param 3 & 4 are to the
1063  * output generator and input parser routines. Absence of a routine is
1064  * permitted -- it only means can't either 'cat' the file, or send data
1065  * to it.
1066  */
1067 static DEVICE_ATTR(size, S_IRUGO, show_tabletSize, NULL);
1068 
1069 /***********************************************************************
1070  * support routines for the 'pointer_mode' file. Note that this file
1071  * both displays current setting and allows reprogramming.
1072  */
1073 static struct aiptek_map pointer_mode_map[] = {
1074         { "stylus",     AIPTEK_POINTER_ONLY_STYLUS_MODE },
1075         { "mouse",      AIPTEK_POINTER_ONLY_MOUSE_MODE },
1076         { "either",     AIPTEK_POINTER_EITHER_MODE },
1077         { NULL,         AIPTEK_INVALID_VALUE }
1078 };
1079 
1080 static ssize_t show_tabletPointerMode(struct device *dev, struct device_attribute *attr, char *buf)
1081 {
1082         struct aiptek *aiptek = dev_get_drvdata(dev);
1083 
1084         return snprintf(buf, PAGE_SIZE, "%s\n",
1085                         map_val_to_str(pointer_mode_map,
1086                                         aiptek->curSetting.pointerMode));
1087 }
1088 
1089 static ssize_t
1090 store_tabletPointerMode(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1091 {
1092         struct aiptek *aiptek = dev_get_drvdata(dev);
1093         int new_mode = map_str_to_val(pointer_mode_map, buf, count);
1094 
1095         if (new_mode == AIPTEK_INVALID_VALUE)
1096                 return -EINVAL;
1097 
1098         aiptek->newSetting.pointerMode = new_mode;
1099         return count;
1100 }
1101 
1102 static DEVICE_ATTR(pointer_mode,
1103                    S_IRUGO | S_IWUSR,
1104                    show_tabletPointerMode, store_tabletPointerMode);
1105 
1106 /***********************************************************************
1107  * support routines for the 'coordinate_mode' file. Note that this file
1108  * both displays current setting and allows reprogramming.
1109  */
1110 
1111 static struct aiptek_map coordinate_mode_map[] = {
1112         { "absolute",   AIPTEK_COORDINATE_ABSOLUTE_MODE },
1113         { "relative",   AIPTEK_COORDINATE_RELATIVE_MODE },
1114         { NULL,         AIPTEK_INVALID_VALUE }
1115 };
1116 
1117 static ssize_t show_tabletCoordinateMode(struct device *dev, struct device_attribute *attr, char *buf)
1118 {
1119         struct aiptek *aiptek = dev_get_drvdata(dev);
1120 
1121         return snprintf(buf, PAGE_SIZE, "%s\n",
1122                         map_val_to_str(coordinate_mode_map,
1123                                         aiptek->curSetting.coordinateMode));
1124 }
1125 
1126 static ssize_t
1127 store_tabletCoordinateMode(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1128 {
1129         struct aiptek *aiptek = dev_get_drvdata(dev);
1130         int new_mode = map_str_to_val(coordinate_mode_map, buf, count);
1131 
1132         if (new_mode == AIPTEK_INVALID_VALUE)
1133                 return -EINVAL;
1134 
1135         aiptek->newSetting.coordinateMode = new_mode;
1136         return count;
1137 }
1138 
1139 static DEVICE_ATTR(coordinate_mode,
1140                    S_IRUGO | S_IWUSR,
1141                    show_tabletCoordinateMode, store_tabletCoordinateMode);
1142 
1143 /***********************************************************************
1144  * support routines for the 'tool_mode' file. Note that this file
1145  * both displays current setting and allows reprogramming.
1146  */
1147 
1148 static struct aiptek_map tool_mode_map[] = {
1149         { "mouse",      AIPTEK_TOOL_BUTTON_MOUSE_MODE },
1150         { "eraser",     AIPTEK_TOOL_BUTTON_ERASER_MODE },
1151         { "pencil",     AIPTEK_TOOL_BUTTON_PENCIL_MODE },
1152         { "pen",        AIPTEK_TOOL_BUTTON_PEN_MODE },
1153         { "brush",      AIPTEK_TOOL_BUTTON_BRUSH_MODE },
1154         { "airbrush",   AIPTEK_TOOL_BUTTON_AIRBRUSH_MODE },
1155         { "lens",       AIPTEK_TOOL_BUTTON_LENS_MODE },
1156         { NULL,         AIPTEK_INVALID_VALUE }
1157 };
1158 
1159 static ssize_t show_tabletToolMode(struct device *dev, struct device_attribute *attr, char *buf)
1160 {
1161         struct aiptek *aiptek = dev_get_drvdata(dev);
1162 
1163         return snprintf(buf, PAGE_SIZE, "%s\n",
1164                         map_val_to_str(tool_mode_map,
1165                                         aiptek->curSetting.toolMode));
1166 }
1167 
1168 static ssize_t
1169 store_tabletToolMode(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1170 {
1171         struct aiptek *aiptek = dev_get_drvdata(dev);
1172         int new_mode = map_str_to_val(tool_mode_map, buf, count);
1173 
1174         if (new_mode == AIPTEK_INVALID_VALUE)
1175                 return -EINVAL;
1176 
1177         aiptek->newSetting.toolMode = new_mode;
1178         return count;
1179 }
1180 
1181 static DEVICE_ATTR(tool_mode,
1182                    S_IRUGO | S_IWUSR,
1183                    show_tabletToolMode, store_tabletToolMode);
1184 
1185 /***********************************************************************
1186  * support routines for the 'xtilt' file. Note that this file
1187  * both displays current setting and allows reprogramming.
1188  */
1189 static ssize_t show_tabletXtilt(struct device *dev, struct device_attribute *attr, char *buf)
1190 {
1191         struct aiptek *aiptek = dev_get_drvdata(dev);
1192 
1193         if (aiptek->curSetting.xTilt == AIPTEK_TILT_DISABLE) {
1194                 return snprintf(buf, PAGE_SIZE, "disable\n");
1195         } else {
1196                 return snprintf(buf, PAGE_SIZE, "%d\n",
1197                                 aiptek->curSetting.xTilt);
1198         }
1199 }
1200 
1201 static ssize_t
1202 store_tabletXtilt(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1203 {
1204         struct aiptek *aiptek = dev_get_drvdata(dev);
1205         int x;
1206 
1207         if (kstrtoint(buf, 10, &x)) {
1208                 size_t len = buf[count - 1] == '\n' ? count - 1 : count;
1209 
1210                 if (strncmp(buf, "disable", len))
1211                         return -EINVAL;
1212 
1213                 aiptek->newSetting.xTilt = AIPTEK_TILT_DISABLE;
1214         } else {
1215                 if (x < AIPTEK_TILT_MIN || x > AIPTEK_TILT_MAX)
1216                         return -EINVAL;
1217 
1218                 aiptek->newSetting.xTilt = x;
1219         }
1220 
1221         return count;
1222 }
1223 
1224 static DEVICE_ATTR(xtilt,
1225                    S_IRUGO | S_IWUSR, show_tabletXtilt, store_tabletXtilt);
1226 
1227 /***********************************************************************
1228  * support routines for the 'ytilt' file. Note that this file
1229  * both displays current setting and allows reprogramming.
1230  */
1231 static ssize_t show_tabletYtilt(struct device *dev, struct device_attribute *attr, char *buf)
1232 {
1233         struct aiptek *aiptek = dev_get_drvdata(dev);
1234 
1235         if (aiptek->curSetting.yTilt == AIPTEK_TILT_DISABLE) {
1236                 return snprintf(buf, PAGE_SIZE, "disable\n");
1237         } else {
1238                 return snprintf(buf, PAGE_SIZE, "%d\n",
1239                                 aiptek->curSetting.yTilt);
1240         }
1241 }
1242 
1243 static ssize_t
1244 store_tabletYtilt(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1245 {
1246         struct aiptek *aiptek = dev_get_drvdata(dev);
1247         int y;
1248 
1249         if (kstrtoint(buf, 10, &y)) {
1250                 size_t len = buf[count - 1] == '\n' ? count - 1 : count;
1251 
1252                 if (strncmp(buf, "disable", len))
1253                         return -EINVAL;
1254 
1255                 aiptek->newSetting.yTilt = AIPTEK_TILT_DISABLE;
1256         } else {
1257                 if (y < AIPTEK_TILT_MIN || y > AIPTEK_TILT_MAX)
1258                         return -EINVAL;
1259 
1260                 aiptek->newSetting.yTilt = y;
1261         }
1262 
1263         return count;
1264 }
1265 
1266 static DEVICE_ATTR(ytilt,
1267                    S_IRUGO | S_IWUSR, show_tabletYtilt, store_tabletYtilt);
1268 
1269 /***********************************************************************
1270  * support routines for the 'jitter' file. Note that this file
1271  * both displays current setting and allows reprogramming.
1272  */
1273 static ssize_t show_tabletJitterDelay(struct device *dev, struct device_attribute *attr, char *buf)
1274 {
1275         struct aiptek *aiptek = dev_get_drvdata(dev);
1276 
1277         return snprintf(buf, PAGE_SIZE, "%d\n", aiptek->curSetting.jitterDelay);
1278 }
1279 
1280 static ssize_t
1281 store_tabletJitterDelay(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1282 {
1283         struct aiptek *aiptek = dev_get_drvdata(dev);
1284         int err, j;
1285 
1286         err = kstrtoint(buf, 10, &j);
1287         if (err)
1288                 return err;
1289 
1290         aiptek->newSetting.jitterDelay = j;
1291         return count;
1292 }
1293 
1294 static DEVICE_ATTR(jitter,
1295                    S_IRUGO | S_IWUSR,
1296                    show_tabletJitterDelay, store_tabletJitterDelay);
1297 
1298 /***********************************************************************
1299  * support routines for the 'delay' file. Note that this file
1300  * both displays current setting and allows reprogramming.
1301  */
1302 static ssize_t show_tabletProgrammableDelay(struct device *dev, struct device_attribute *attr, char *buf)
1303 {
1304         struct aiptek *aiptek = dev_get_drvdata(dev);
1305 
1306         return snprintf(buf, PAGE_SIZE, "%d\n",
1307                         aiptek->curSetting.programmableDelay);
1308 }
1309 
1310 static ssize_t
1311 store_tabletProgrammableDelay(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1312 {
1313         struct aiptek *aiptek = dev_get_drvdata(dev);
1314         int err, d;
1315 
1316         err = kstrtoint(buf, 10, &d);
1317         if (err)
1318                 return err;
1319 
1320         aiptek->newSetting.programmableDelay = d;
1321         return count;
1322 }
1323 
1324 static DEVICE_ATTR(delay,
1325                    S_IRUGO | S_IWUSR,
1326                    show_tabletProgrammableDelay, store_tabletProgrammableDelay);
1327 
1328 /***********************************************************************
1329  * support routines for the 'event_count' file. Note that this file
1330  * only displays current setting.
1331  */
1332 static ssize_t show_tabletEventsReceived(struct device *dev, struct device_attribute *attr, char *buf)
1333 {
1334         struct aiptek *aiptek = dev_get_drvdata(dev);
1335 
1336         return snprintf(buf, PAGE_SIZE, "%ld\n", aiptek->eventCount);
1337 }
1338 
1339 static DEVICE_ATTR(event_count, S_IRUGO, show_tabletEventsReceived, NULL);
1340 
1341 /***********************************************************************
1342  * support routines for the 'diagnostic' file. Note that this file
1343  * only displays current setting.
1344  */
1345 static ssize_t show_tabletDiagnosticMessage(struct device *dev, struct device_attribute *attr, char *buf)
1346 {
1347         struct aiptek *aiptek = dev_get_drvdata(dev);
1348         char *retMsg;
1349 
1350         switch (aiptek->diagnostic) {
1351         case AIPTEK_DIAGNOSTIC_NA:
1352                 retMsg = "no errors\n";
1353                 break;
1354 
1355         case AIPTEK_DIAGNOSTIC_SENDING_RELATIVE_IN_ABSOLUTE:
1356                 retMsg = "Error: receiving relative reports\n";
1357                 break;
1358 
1359         case AIPTEK_DIAGNOSTIC_SENDING_ABSOLUTE_IN_RELATIVE:
1360                 retMsg = "Error: receiving absolute reports\n";
1361                 break;
1362 
1363         case AIPTEK_DIAGNOSTIC_TOOL_DISALLOWED:
1364                 if (aiptek->curSetting.pointerMode ==
1365                     AIPTEK_POINTER_ONLY_MOUSE_MODE) {
1366                         retMsg = "Error: receiving stylus reports\n";
1367                 } else {
1368                         retMsg = "Error: receiving mouse reports\n";
1369                 }
1370                 break;
1371 
1372         default:
1373                 return 0;
1374         }
1375         return snprintf(buf, PAGE_SIZE, retMsg);
1376 }
1377 
1378 static DEVICE_ATTR(diagnostic, S_IRUGO, show_tabletDiagnosticMessage, NULL);
1379 
1380 /***********************************************************************
1381  * support routines for the 'stylus_upper' file. Note that this file
1382  * both displays current setting and allows for setting changing.
1383  */
1384 
1385 static struct aiptek_map stylus_button_map[] = {
1386         { "upper",      AIPTEK_STYLUS_UPPER_BUTTON },
1387         { "lower",      AIPTEK_STYLUS_LOWER_BUTTON },
1388         { NULL,         AIPTEK_INVALID_VALUE }
1389 };
1390 
1391 static ssize_t show_tabletStylusUpper(struct device *dev, struct device_attribute *attr, char *buf)
1392 {
1393         struct aiptek *aiptek = dev_get_drvdata(dev);
1394 
1395         return snprintf(buf, PAGE_SIZE, "%s\n",
1396                         map_val_to_str(stylus_button_map,
1397                                         aiptek->curSetting.stylusButtonUpper));
1398 }
1399 
1400 static ssize_t
1401 store_tabletStylusUpper(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1402 {
1403         struct aiptek *aiptek = dev_get_drvdata(dev);
1404         int new_button = map_str_to_val(stylus_button_map, buf, count);
1405 
1406         if (new_button == AIPTEK_INVALID_VALUE)
1407                 return -EINVAL;
1408 
1409         aiptek->newSetting.stylusButtonUpper = new_button;
1410         return count;
1411 }
1412 
1413 static DEVICE_ATTR(stylus_upper,
1414                    S_IRUGO | S_IWUSR,
1415                    show_tabletStylusUpper, store_tabletStylusUpper);
1416 
1417 /***********************************************************************
1418  * support routines for the 'stylus_lower' file. Note that this file
1419  * both displays current setting and allows for setting changing.
1420  */
1421 
1422 static ssize_t show_tabletStylusLower(struct device *dev, struct device_attribute *attr, char *buf)
1423 {
1424         struct aiptek *aiptek = dev_get_drvdata(dev);
1425 
1426         return snprintf(buf, PAGE_SIZE, "%s\n",
1427                         map_val_to_str(stylus_button_map,
1428                                         aiptek->curSetting.stylusButtonLower));
1429 }
1430 
1431 static ssize_t
1432 store_tabletStylusLower(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1433 {
1434         struct aiptek *aiptek = dev_get_drvdata(dev);
1435         int new_button = map_str_to_val(stylus_button_map, buf, count);
1436 
1437         if (new_button == AIPTEK_INVALID_VALUE)
1438                 return -EINVAL;
1439 
1440         aiptek->newSetting.stylusButtonLower = new_button;
1441         return count;
1442 }
1443 
1444 static DEVICE_ATTR(stylus_lower,
1445                    S_IRUGO | S_IWUSR,
1446                    show_tabletStylusLower, store_tabletStylusLower);
1447 
1448 /***********************************************************************
1449  * support routines for the 'mouse_left' file. Note that this file
1450  * both displays current setting and allows for setting changing.
1451  */
1452 
1453 static struct aiptek_map mouse_button_map[] = {
1454         { "left",       AIPTEK_MOUSE_LEFT_BUTTON },
1455         { "middle",     AIPTEK_MOUSE_MIDDLE_BUTTON },
1456         { "right",      AIPTEK_MOUSE_RIGHT_BUTTON },
1457         { NULL,         AIPTEK_INVALID_VALUE }
1458 };
1459 
1460 static ssize_t show_tabletMouseLeft(struct device *dev, struct device_attribute *attr, char *buf)
1461 {
1462         struct aiptek *aiptek = dev_get_drvdata(dev);
1463 
1464         return snprintf(buf, PAGE_SIZE, "%s\n",
1465                         map_val_to_str(mouse_button_map,
1466                                         aiptek->curSetting.mouseButtonLeft));
1467 }
1468 
1469 static ssize_t
1470 store_tabletMouseLeft(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1471 {
1472         struct aiptek *aiptek = dev_get_drvdata(dev);
1473         int new_button = map_str_to_val(mouse_button_map, buf, count);
1474 
1475         if (new_button == AIPTEK_INVALID_VALUE)
1476                 return -EINVAL;
1477 
1478         aiptek->newSetting.mouseButtonLeft = new_button;
1479         return count;
1480 }
1481 
1482 static DEVICE_ATTR(mouse_left,
1483                    S_IRUGO | S_IWUSR,
1484                    show_tabletMouseLeft, store_tabletMouseLeft);
1485 
1486 /***********************************************************************
1487  * support routines for the 'mouse_middle' file. Note that this file
1488  * both displays current setting and allows for setting changing.
1489  */
1490 static ssize_t show_tabletMouseMiddle(struct device *dev, struct device_attribute *attr, char *buf)
1491 {
1492         struct aiptek *aiptek = dev_get_drvdata(dev);
1493 
1494         return snprintf(buf, PAGE_SIZE, "%s\n",
1495                         map_val_to_str(mouse_button_map,
1496                                         aiptek->curSetting.mouseButtonMiddle));
1497 }
1498 
1499 static ssize_t
1500 store_tabletMouseMiddle(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1501 {
1502         struct aiptek *aiptek = dev_get_drvdata(dev);
1503         int new_button = map_str_to_val(mouse_button_map, buf, count);
1504 
1505         if (new_button == AIPTEK_INVALID_VALUE)
1506                 return -EINVAL;
1507 
1508         aiptek->newSetting.mouseButtonMiddle = new_button;
1509         return count;
1510 }
1511 
1512 static DEVICE_ATTR(mouse_middle,
1513                    S_IRUGO | S_IWUSR,
1514                    show_tabletMouseMiddle, store_tabletMouseMiddle);
1515 
1516 /***********************************************************************
1517  * support routines for the 'mouse_right' file. Note that this file
1518  * both displays current setting and allows for setting changing.
1519  */
1520 static ssize_t show_tabletMouseRight(struct device *dev, struct device_attribute *attr, char *buf)
1521 {
1522         struct aiptek *aiptek = dev_get_drvdata(dev);
1523 
1524         return snprintf(buf, PAGE_SIZE, "%s\n",
1525                         map_val_to_str(mouse_button_map,
1526                                         aiptek->curSetting.mouseButtonRight));
1527 }
1528 
1529 static ssize_t
1530 store_tabletMouseRight(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1531 {
1532         struct aiptek *aiptek = dev_get_drvdata(dev);
1533         int new_button = map_str_to_val(mouse_button_map, buf, count);
1534 
1535         if (new_button == AIPTEK_INVALID_VALUE)
1536                 return -EINVAL;
1537 
1538         aiptek->newSetting.mouseButtonRight = new_button;
1539         return count;
1540 }
1541 
1542 static DEVICE_ATTR(mouse_right,
1543                    S_IRUGO | S_IWUSR,
1544                    show_tabletMouseRight, store_tabletMouseRight);
1545 
1546 /***********************************************************************
1547  * support routines for the 'wheel' file. Note that this file
1548  * both displays current setting and allows for setting changing.
1549  */
1550 static ssize_t show_tabletWheel(struct device *dev, struct device_attribute *attr, char *buf)
1551 {
1552         struct aiptek *aiptek = dev_get_drvdata(dev);
1553 
1554         if (aiptek->curSetting.wheel == AIPTEK_WHEEL_DISABLE) {
1555                 return snprintf(buf, PAGE_SIZE, "disable\n");
1556         } else {
1557                 return snprintf(buf, PAGE_SIZE, "%d\n",
1558                                 aiptek->curSetting.wheel);
1559         }
1560 }
1561 
1562 static ssize_t
1563 store_tabletWheel(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1564 {
1565         struct aiptek *aiptek = dev_get_drvdata(dev);
1566         int err, w;
1567 
1568         err = kstrtoint(buf, 10, &w);
1569         if (err)
1570                 return err;
1571 
1572         aiptek->newSetting.wheel = w;
1573         return count;
1574 }
1575 
1576 static DEVICE_ATTR(wheel,
1577                    S_IRUGO | S_IWUSR, show_tabletWheel, store_tabletWheel);
1578 
1579 /***********************************************************************
1580  * support routines for the 'execute' file. Note that this file
1581  * both displays current setting and allows for setting changing.
1582  */
1583 static ssize_t show_tabletExecute(struct device *dev, struct device_attribute *attr, char *buf)
1584 {
1585         /* There is nothing useful to display, so a one-line manual
1586          * is in order...
1587          */
1588         return snprintf(buf, PAGE_SIZE,
1589                         "Write anything to this file to program your tablet.\n");
1590 }
1591 
1592 static ssize_t
1593 store_tabletExecute(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1594 {
1595         struct aiptek *aiptek = dev_get_drvdata(dev);
1596 
1597         /* We do not care what you write to this file. Merely the action
1598          * of writing to this file triggers a tablet reprogramming.
1599          */
1600         memcpy(&aiptek->curSetting, &aiptek->newSetting,
1601                sizeof(struct aiptek_settings));
1602 
1603         if (aiptek_program_tablet(aiptek) < 0)
1604                 return -EIO;
1605 
1606         return count;
1607 }
1608 
1609 static DEVICE_ATTR(execute,
1610                    S_IRUGO | S_IWUSR, show_tabletExecute, store_tabletExecute);
1611 
1612 /***********************************************************************
1613  * support routines for the 'odm_code' file. Note that this file
1614  * only displays current setting.
1615  */
1616 static ssize_t show_tabletODMCode(struct device *dev, struct device_attribute *attr, char *buf)
1617 {
1618         struct aiptek *aiptek = dev_get_drvdata(dev);
1619 
1620         return snprintf(buf, PAGE_SIZE, "0x%04x\n", aiptek->features.odmCode);
1621 }
1622 
1623 static DEVICE_ATTR(odm_code, S_IRUGO, show_tabletODMCode, NULL);
1624 
1625 /***********************************************************************
1626  * support routines for the 'model_code' file. Note that this file
1627  * only displays current setting.
1628  */
1629 static ssize_t show_tabletModelCode(struct device *dev, struct device_attribute *attr, char *buf)
1630 {
1631         struct aiptek *aiptek = dev_get_drvdata(dev);
1632 
1633         return snprintf(buf, PAGE_SIZE, "0x%04x\n", aiptek->features.modelCode);
1634 }
1635 
1636 static DEVICE_ATTR(model_code, S_IRUGO, show_tabletModelCode, NULL);
1637 
1638 /***********************************************************************
1639  * support routines for the 'firmware_code' file. Note that this file
1640  * only displays current setting.
1641  */
1642 static ssize_t show_firmwareCode(struct device *dev, struct device_attribute *attr, char *buf)
1643 {
1644         struct aiptek *aiptek = dev_get_drvdata(dev);
1645 
1646         return snprintf(buf, PAGE_SIZE, "%04x\n",
1647                         aiptek->features.firmwareCode);
1648 }
1649 
1650 static DEVICE_ATTR(firmware_code, S_IRUGO, show_firmwareCode, NULL);
1651 
1652 static struct attribute *aiptek_attributes[] = {
1653         &dev_attr_size.attr,
1654         &dev_attr_pointer_mode.attr,
1655         &dev_attr_coordinate_mode.attr,
1656         &dev_attr_tool_mode.attr,
1657         &dev_attr_xtilt.attr,
1658         &dev_attr_ytilt.attr,
1659         &dev_attr_jitter.attr,
1660         &dev_attr_delay.attr,
1661         &dev_attr_event_count.attr,
1662         &dev_attr_diagnostic.attr,
1663         &dev_attr_odm_code.attr,
1664         &dev_attr_model_code.attr,
1665         &dev_attr_firmware_code.attr,
1666         &dev_attr_stylus_lower.attr,
1667         &dev_attr_stylus_upper.attr,
1668         &dev_attr_mouse_left.attr,
1669         &dev_attr_mouse_middle.attr,
1670         &dev_attr_mouse_right.attr,
1671         &dev_attr_wheel.attr,
1672         &dev_attr_execute.attr,
1673         NULL
1674 };
1675 
1676 static struct attribute_group aiptek_attribute_group = {
1677         .attrs  = aiptek_attributes,
1678 };
1679 
1680 /***********************************************************************
1681  * This routine is called when a tablet has been identified. It basically
1682  * sets up the tablet and the driver's internal structures.
1683  */
1684 static int
1685 aiptek_probe(struct usb_interface *intf, const struct usb_device_id *id)
1686 {
1687         struct usb_device *usbdev = interface_to_usbdev(intf);
1688         struct usb_endpoint_descriptor *endpoint;
1689         struct aiptek *aiptek;
1690         struct input_dev *inputdev;
1691         int i;
1692         int speeds[] = { 0,
1693                 AIPTEK_PROGRAMMABLE_DELAY_50,
1694                 AIPTEK_PROGRAMMABLE_DELAY_400,
1695                 AIPTEK_PROGRAMMABLE_DELAY_25,
1696                 AIPTEK_PROGRAMMABLE_DELAY_100,
1697                 AIPTEK_PROGRAMMABLE_DELAY_200,
1698                 AIPTEK_PROGRAMMABLE_DELAY_300
1699         };
1700         int err = -ENOMEM;
1701 
1702         /* programmableDelay is where the command-line specified
1703          * delay is kept. We make it the first element of speeds[],
1704          * so therefore, your override speed is tried first, then the
1705          * remainder. Note that the default value of 400ms will be tried
1706          * if you do not specify any command line parameter.
1707          */
1708         speeds[0] = programmableDelay;
1709 
1710         aiptek = kzalloc(sizeof(struct aiptek), GFP_KERNEL);
1711         inputdev = input_allocate_device();
1712         if (!aiptek || !inputdev) {
1713                 dev_warn(&intf->dev,
1714                          "cannot allocate memory or input device\n");
1715                 goto fail1;
1716         }
1717 
1718         aiptek->data = usb_alloc_coherent(usbdev, AIPTEK_PACKET_LENGTH,
1719                                           GFP_ATOMIC, &aiptek->data_dma);
1720         if (!aiptek->data) {
1721                 dev_warn(&intf->dev, "cannot allocate usb buffer\n");
1722                 goto fail1;
1723         }
1724 
1725         aiptek->urb = usb_alloc_urb(0, GFP_KERNEL);
1726         if (!aiptek->urb) {
1727                 dev_warn(&intf->dev, "cannot allocate urb\n");
1728                 goto fail2;
1729         }
1730 
1731         aiptek->inputdev = inputdev;
1732         aiptek->usbdev = usbdev;
1733         aiptek->intf = intf;
1734         aiptek->ifnum = intf->altsetting[0].desc.bInterfaceNumber;
1735         aiptek->inDelay = 0;
1736         aiptek->endDelay = 0;
1737         aiptek->previousJitterable = 0;
1738         aiptek->lastMacro = -1;
1739 
1740         /* Set up the curSettings struct. Said struct contains the current
1741          * programmable parameters. The newSetting struct contains changes
1742          * the user makes to the settings via the sysfs interface. Those
1743          * changes are not "committed" to curSettings until the user
1744          * writes to the sysfs/.../execute file.
1745          */
1746         aiptek->curSetting.pointerMode = AIPTEK_POINTER_EITHER_MODE;
1747         aiptek->curSetting.coordinateMode = AIPTEK_COORDINATE_ABSOLUTE_MODE;
1748         aiptek->curSetting.toolMode = AIPTEK_TOOL_BUTTON_PEN_MODE;
1749         aiptek->curSetting.xTilt = AIPTEK_TILT_DISABLE;
1750         aiptek->curSetting.yTilt = AIPTEK_TILT_DISABLE;
1751         aiptek->curSetting.mouseButtonLeft = AIPTEK_MOUSE_LEFT_BUTTON;
1752         aiptek->curSetting.mouseButtonMiddle = AIPTEK_MOUSE_MIDDLE_BUTTON;
1753         aiptek->curSetting.mouseButtonRight = AIPTEK_MOUSE_RIGHT_BUTTON;
1754         aiptek->curSetting.stylusButtonUpper = AIPTEK_STYLUS_UPPER_BUTTON;
1755         aiptek->curSetting.stylusButtonLower = AIPTEK_STYLUS_LOWER_BUTTON;
1756         aiptek->curSetting.jitterDelay = jitterDelay;
1757         aiptek->curSetting.programmableDelay = programmableDelay;
1758 
1759         /* Both structs should have equivalent settings
1760          */
1761         aiptek->newSetting = aiptek->curSetting;
1762 
1763         /* Determine the usb devices' physical path.
1764          * Asketh not why we always pretend we're using "../input0",
1765          * but I suspect this will have to be refactored one
1766          * day if a single USB device can be a keyboard & a mouse
1767          * & a tablet, and the inputX number actually will tell
1768          * us something...
1769          */
1770         usb_make_path(usbdev, aiptek->features.usbPath,
1771                         sizeof(aiptek->features.usbPath));
1772         strlcat(aiptek->features.usbPath, "/input0",
1773                 sizeof(aiptek->features.usbPath));
1774 
1775         /* Set up client data, pointers to open and close routines
1776          * for the input device.
1777          */
1778         inputdev->name = "Aiptek";
1779         inputdev->phys = aiptek->features.usbPath;
1780         usb_to_input_id(usbdev, &inputdev->id);
1781         inputdev->dev.parent = &intf->dev;
1782 
1783         input_set_drvdata(inputdev, aiptek);
1784 
1785         inputdev->open = aiptek_open;
1786         inputdev->close = aiptek_close;
1787 
1788         /* Now program the capacities of the tablet, in terms of being
1789          * an input device.
1790          */
1791         for (i = 0; i < ARRAY_SIZE(eventTypes); ++i)
1792                 __set_bit(eventTypes[i], inputdev->evbit);
1793 
1794         for (i = 0; i < ARRAY_SIZE(absEvents); ++i)
1795                 __set_bit(absEvents[i], inputdev->absbit);
1796 
1797         for (i = 0; i < ARRAY_SIZE(relEvents); ++i)
1798                 __set_bit(relEvents[i], inputdev->relbit);
1799 
1800         __set_bit(MSC_SERIAL, inputdev->mscbit);
1801 
1802         /* Set up key and button codes */
1803         for (i = 0; i < ARRAY_SIZE(buttonEvents); ++i)
1804                 __set_bit(buttonEvents[i], inputdev->keybit);
1805 
1806         for (i = 0; i < ARRAY_SIZE(macroKeyEvents); ++i)
1807                 __set_bit(macroKeyEvents[i], inputdev->keybit);
1808 
1809         /*
1810          * Program the input device coordinate capacities. We do not yet
1811          * know what maximum X, Y, and Z values are, so we're putting fake
1812          * values in. Later, we'll ask the tablet to put in the correct
1813          * values.
1814          */
1815         input_set_abs_params(inputdev, ABS_X, 0, 2999, 0, 0);
1816         input_set_abs_params(inputdev, ABS_Y, 0, 2249, 0, 0);
1817         input_set_abs_params(inputdev, ABS_PRESSURE, 0, 511, 0, 0);
1818         input_set_abs_params(inputdev, ABS_TILT_X, AIPTEK_TILT_MIN, AIPTEK_TILT_MAX, 0, 0);
1819         input_set_abs_params(inputdev, ABS_TILT_Y, AIPTEK_TILT_MIN, AIPTEK_TILT_MAX, 0, 0);
1820         input_set_abs_params(inputdev, ABS_WHEEL, AIPTEK_WHEEL_MIN, AIPTEK_WHEEL_MAX - 1, 0, 0);
1821 
1822         endpoint = &intf->altsetting[0].endpoint[0].desc;
1823 
1824         /* Go set up our URB, which is called when the tablet receives
1825          * input.
1826          */
1827         usb_fill_int_urb(aiptek->urb,
1828                          aiptek->usbdev,
1829                          usb_rcvintpipe(aiptek->usbdev,
1830                                         endpoint->bEndpointAddress),
1831                          aiptek->data, 8, aiptek_irq, aiptek,
1832                          endpoint->bInterval);
1833 
1834         aiptek->urb->transfer_dma = aiptek->data_dma;
1835         aiptek->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1836 
1837         /* Program the tablet. This sets the tablet up in the mode
1838          * specified in newSetting, and also queries the tablet's
1839          * physical capacities.
1840          *
1841          * Sanity check: if a tablet doesn't like the slow programmatic
1842          * delay, we often get sizes of 0x0. Let's use that as an indicator
1843          * to try faster delays, up to 25 ms. If that logic fails, well, you'll
1844          * have to explain to us how your tablet thinks it's 0x0, and yet that's
1845          * not an error :-)
1846          */
1847 
1848         for (i = 0; i < ARRAY_SIZE(speeds); ++i) {
1849                 aiptek->curSetting.programmableDelay = speeds[i];
1850                 (void)aiptek_program_tablet(aiptek);
1851                 if (input_abs_get_max(aiptek->inputdev, ABS_X) > 0) {
1852                         dev_info(&intf->dev,
1853                                  "Aiptek using %d ms programming speed\n",
1854                                  aiptek->curSetting.programmableDelay);
1855                         break;
1856                 }
1857         }
1858 
1859         /* Murphy says that some day someone will have a tablet that fails the
1860            above test. That's you, Frederic Rodrigo */
1861         if (i == ARRAY_SIZE(speeds)) {
1862                 dev_info(&intf->dev,
1863                          "Aiptek tried all speeds, no sane response\n");
1864                 goto fail3;
1865         }
1866 
1867         /* Associate this driver's struct with the usb interface.
1868          */
1869         usb_set_intfdata(intf, aiptek);
1870 
1871         /* Set up the sysfs files
1872          */
1873         err = sysfs_create_group(&intf->dev.kobj, &aiptek_attribute_group);
1874         if (err) {
1875                 dev_warn(&intf->dev, "cannot create sysfs group err: %d\n",
1876                          err);
1877                 goto fail3;
1878         }
1879 
1880         /* Register the tablet as an Input Device
1881          */
1882         err = input_register_device(aiptek->inputdev);
1883         if (err) {
1884                 dev_warn(&intf->dev,
1885                          "input_register_device returned err: %d\n", err);
1886                 goto fail4;
1887         }
1888         return 0;
1889 
1890  fail4: sysfs_remove_group(&intf->dev.kobj, &aiptek_attribute_group);
1891  fail3: usb_free_urb(aiptek->urb);
1892  fail2: usb_free_coherent(usbdev, AIPTEK_PACKET_LENGTH, aiptek->data,
1893                           aiptek->data_dma);
1894  fail1: usb_set_intfdata(intf, NULL);
1895         input_free_device(inputdev);
1896         kfree(aiptek);
1897         return err;
1898 }
1899 
1900 /***********************************************************************
1901  * Deal with tablet disconnecting from the system.
1902  */
1903 static void aiptek_disconnect(struct usb_interface *intf)
1904 {
1905         struct aiptek *aiptek = usb_get_intfdata(intf);
1906 
1907         /* Disassociate driver's struct with usb interface
1908          */
1909         usb_set_intfdata(intf, NULL);
1910         if (aiptek != NULL) {
1911                 /* Free & unhook everything from the system.
1912                  */
1913                 usb_kill_urb(aiptek->urb);
1914                 input_unregister_device(aiptek->inputdev);
1915                 sysfs_remove_group(&intf->dev.kobj, &aiptek_attribute_group);
1916                 usb_free_urb(aiptek->urb);
1917                 usb_free_coherent(interface_to_usbdev(intf),
1918                                   AIPTEK_PACKET_LENGTH,
1919                                   aiptek->data, aiptek->data_dma);
1920                 kfree(aiptek);
1921         }
1922 }
1923 
1924 static struct usb_driver aiptek_driver = {
1925         .name = "aiptek",
1926         .probe = aiptek_probe,
1927         .disconnect = aiptek_disconnect,
1928         .id_table = aiptek_ids,
1929 };
1930 
1931 module_usb_driver(aiptek_driver);
1932 
1933 MODULE_AUTHOR(DRIVER_AUTHOR);
1934 MODULE_DESCRIPTION(DRIVER_DESC);
1935 MODULE_LICENSE("GPL");
1936 
1937 module_param(programmableDelay, int, 0);
1938 MODULE_PARM_DESC(programmableDelay, "delay used during tablet programming");
1939 module_param(jitterDelay, int, 0);
1940 MODULE_PARM_DESC(jitterDelay, "stylus/mouse settlement delay");
1941 

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