xref: /openbmc/linux/drivers/input/tablet/aiptek.c (revision c4f7ac64)
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  *  Native support for the Aiptek HyperPen USB Tablets
4  *  (4000U/5000U/6000U/8000U/12000U)
5  *
6  *  Copyright (c) 2001      Chris Atenasio   <chris@crud.net>
7  *  Copyright (c) 2002-2004 Bryan W. Headley <bwheadley@earthlink.net>
8  *
9  *  based on wacom.c by
10  *     Vojtech Pavlik      <vojtech@suse.cz>
11  *     Andreas Bach Aaen   <abach@stofanet.dk>
12  *     Clifford Wolf       <clifford@clifford.at>
13  *     Sam Mosel           <sam.mosel@computer.org>
14  *     James E. Blair      <corvus@gnu.org>
15  *     Daniel Egger        <egger@suse.de>
16  *
17  *  Many thanks to Oliver Kuechemann for his support.
18  *
19  *  ChangeLog:
20  *      v0.1 - Initial release
21  *      v0.2 - Hack to get around fake event 28's. (Bryan W. Headley)
22  *      v0.3 - Make URB dynamic (Bryan W. Headley, Jun-8-2002)
23  *             Released to Linux 2.4.19 and 2.5.x
24  *      v0.4 - Rewrote substantial portions of the code to deal with
25  *             corrected control sequences, timing, dynamic configuration,
26  *             support of 6000U - 12000U, procfs, and macro key support
27  *             (Jan-1-2003 - Feb-5-2003, Bryan W. Headley)
28  *      v1.0 - Added support for diagnostic messages, count of messages
29  *             received from URB - Mar-8-2003, Bryan W. Headley
30  *      v1.1 - added support for tablet resolution, changed DV and proximity
31  *             some corrections - Jun-22-2003, martin schneebacher
32  *           - Added support for the sysfs interface, deprecating the
33  *             procfs interface for 2.5.x kernel. Also added support for
34  *             Wheel command. Bryan W. Headley July-15-2003.
35  *      v1.2 - Reworked jitter timer as a kernel thread.
36  *             Bryan W. Headley November-28-2003/Jan-10-2004.
37  *      v1.3 - Repaired issue of kernel thread going nuts on single-processor
38  *             machines, introduced programmableDelay as a command line
39  *             parameter. Feb 7 2004, Bryan W. Headley.
40  *      v1.4 - Re-wire jitter so it does not require a thread. Courtesy of
41  *             Rene van Paassen. Added reporting of physical pointer device
42  *             (e.g., stylus, mouse in reports 2, 3, 4, 5. We don't know
43  *             for reports 1, 6.)
44  *             what physical device reports for reports 1, 6.) Also enabled
45  *             MOUSE and LENS tool button modes. Renamed "rubber" to "eraser".
46  *             Feb 20, 2004, Bryan W. Headley.
47  *      v1.5 - Added previousJitterable, so we don't do jitter delay when the
48  *             user is holding a button down for periods of time.
49  *
50  * NOTE:
51  *      This kernel driver is augmented by the "Aiptek" XFree86 input
52  *      driver for your X server, as well as the Gaiptek GUI Front-end
53  *      "Tablet Manager".
54  *      These three products are highly interactive with one another,
55  *      so therefore it's easier to document them all as one subsystem.
56  *      Please visit the project's "home page", located at,
57  *      http://aiptektablet.sourceforge.net.
58  */
59 
60 #include <linux/jiffies.h>
61 #include <linux/kernel.h>
62 #include <linux/slab.h>
63 #include <linux/module.h>
64 #include <linux/usb/input.h>
65 #include <linux/uaccess.h>
66 #include <asm/unaligned.h>
67 
68 /*
69  * Aiptek status packet:
70  *
71  * (returned as Report 1 - relative coordinates from mouse and stylus)
72  *
73  *        bit7  bit6  bit5  bit4  bit3  bit2  bit1  bit0
74  * byte0   0     0     0     0     0     0     0     1
75  * byte1   0     0     0     0     0    BS2   BS    Tip
76  * byte2  X7    X6    X5    X4    X3    X2    X1    X0
77  * byte3  Y7    Y6    Y5    Y4    Y3    Y2    Y1    Y0
78  *
79  * (returned as Report 2 - absolute coordinates from the stylus)
80  *
81  *        bit7  bit6  bit5  bit4  bit3  bit2  bit1  bit0
82  * byte0   0     0     0     0     0     0     1     0
83  * byte1  X7    X6    X5    X4    X3    X2    X1    X0
84  * byte2  X15   X14   X13   X12   X11   X10   X9    X8
85  * byte3  Y7    Y6    Y5    Y4    Y3    Y2    Y1    Y0
86  * byte4  Y15   Y14   Y13   Y12   Y11   Y10   Y9    Y8
87  * byte5   *     *     *    BS2   BS1   Tip   IR    DV
88  * byte6  P7    P6    P5    P4    P3    P2    P1    P0
89  * byte7  P15   P14   P13   P12   P11   P10   P9    P8
90  *
91  * (returned as Report 3 - absolute coordinates from the mouse)
92  *
93  *        bit7  bit6  bit5  bit4  bit3  bit2  bit1  bit0
94  * byte0   0     0     0     0     0     0     1     1
95  * byte1  X7    X6    X5    X4    X3    X2    X1    X0
96  * byte2  X15   X14   X13   X12   X11   X10   X9    X8
97  * byte3  Y7    Y6    Y5    Y4    Y3    Y2    Y1    Y0
98  * byte4  Y15   Y14   Y13   Y12   Y11   Y10   Y9    Y8
99  * byte5   *     *     *    BS2   BS1   Tip   IR    DV
100  * byte6  P7    P6    P5    P4    P3    P2    P1    P0
101  * byte7  P15   P14   P13   P12   P11   P10   P9    P8
102  *
103  * (returned as Report 4 - macrokeys from the stylus)
104  *
105  *        bit7  bit6  bit5  bit4  bit3  bit2  bit1  bit0
106  * byte0   0     0     0     0     0     1     0     0
107  * byte1   0     0     0    BS2   BS    Tip   IR    DV
108  * byte2   0     0     0     0     0     0     1     0
109  * byte3   0     0     0    K4    K3    K2    K1    K0
110  * byte4  P7    P6    P5    P4    P3    P2    P1    P0
111  * byte5  P15   P14   P13   P12   P11   P10   P9    P8
112  *
113  * (returned as Report 5 - macrokeys from the mouse)
114  *
115  *        bit7  bit6  bit5  bit4  bit3  bit2  bit1  bit0
116  * byte0   0     0     0     0     0     1     0     1
117  * byte1   0     0     0    BS2   BS    Tip   IR    DV
118  * byte2   0     0     0     0     0     0     1     0
119  * byte3   0     0     0    K4    K3    K2    K1    K0
120  * byte4  P7    P6    P5    P4    P3    P2    P1    P0
121  * byte5  P15   P14   P13   P12   P11   P10   P9    P8
122  *
123  * IR: In Range = Proximity on
124  * DV = Data Valid
125  * BS = Barrel Switch (as in, macro keys)
126  * BS2 also referred to as Tablet Pick
127  *
128  * Command Summary:
129  *
130  * Use report_type CONTROL (3)
131  * Use report_id   2
132  *
133  * Command/Data    Description     Return Bytes    Return Value
134  * 0x10/0x00       SwitchToMouse       0
135  * 0x10/0x01       SwitchToTablet      0
136  * 0x18/0x04       SetResolution       0
137  * 0x12/0xFF       AutoGainOn          0
138  * 0x17/0x00       FilterOn            0
139  * 0x01/0x00       GetXExtension       2           MaxX
140  * 0x01/0x01       GetYExtension       2           MaxY
141  * 0x02/0x00       GetModelCode        2           ModelCode = LOBYTE
142  * 0x03/0x00       GetODMCode          2           ODMCode
143  * 0x08/0x00       GetPressureLevels   2           =512
144  * 0x04/0x00       GetFirmwareVersion  2           Firmware Version
145  * 0x11/0x02       EnableMacroKeys     0
146  *
147  * To initialize the tablet:
148  *
149  * (1) Send Resolution500LPI (Command)
150  * (2) Query for Model code (Option Report)
151  * (3) Query for ODM code (Option Report)
152  * (4) Query for firmware (Option Report)
153  * (5) Query for GetXExtension (Option Report)
154  * (6) Query for GetYExtension (Option Report)
155  * (7) Query for GetPressureLevels (Option Report)
156  * (8) SwitchToTablet for Absolute coordinates, or
157  *     SwitchToMouse for Relative coordinates (Command)
158  * (9) EnableMacroKeys (Command)
159  * (10) FilterOn (Command)
160  * (11) AutoGainOn (Command)
161  *
162  * (Step 9 can be omitted, but you'll then have no function keys.)
163  */
164 
165 #define USB_VENDOR_ID_AIPTEK				0x08ca
166 #define USB_VENDOR_ID_KYE				0x0458
167 #define USB_REQ_GET_REPORT				0x01
168 #define USB_REQ_SET_REPORT				0x09
169 
170 	/* PointerMode codes
171 	 */
172 #define AIPTEK_POINTER_ONLY_MOUSE_MODE			0
173 #define AIPTEK_POINTER_ONLY_STYLUS_MODE			1
174 #define AIPTEK_POINTER_EITHER_MODE			2
175 
176 #define AIPTEK_POINTER_ALLOW_MOUSE_MODE(a)		\
177 	(a == AIPTEK_POINTER_ONLY_MOUSE_MODE ||		\
178 	 a == AIPTEK_POINTER_EITHER_MODE)
179 #define AIPTEK_POINTER_ALLOW_STYLUS_MODE(a)		\
180 	(a == AIPTEK_POINTER_ONLY_STYLUS_MODE ||	\
181 	 a == AIPTEK_POINTER_EITHER_MODE)
182 
183 	/* CoordinateMode code
184 	 */
185 #define AIPTEK_COORDINATE_RELATIVE_MODE			0
186 #define AIPTEK_COORDINATE_ABSOLUTE_MODE			1
187 
188        /* XTilt and YTilt values
189         */
190 #define AIPTEK_TILT_MIN					(-128)
191 #define AIPTEK_TILT_MAX					127
192 #define AIPTEK_TILT_DISABLE				(-10101)
193 
194 	/* Wheel values
195 	 */
196 #define AIPTEK_WHEEL_MIN				0
197 #define AIPTEK_WHEEL_MAX				1024
198 #define AIPTEK_WHEEL_DISABLE				(-10101)
199 
200 	/* ToolCode values, which BTW are 0x140 .. 0x14f
201 	 * We have things set up such that if the tool button has changed,
202 	 * the tools get reset.
203 	 */
204 	/* toolMode codes
205 	 */
206 #define AIPTEK_TOOL_BUTTON_PEN_MODE			BTN_TOOL_PEN
207 #define AIPTEK_TOOL_BUTTON_PENCIL_MODE			BTN_TOOL_PENCIL
208 #define AIPTEK_TOOL_BUTTON_BRUSH_MODE			BTN_TOOL_BRUSH
209 #define AIPTEK_TOOL_BUTTON_AIRBRUSH_MODE		BTN_TOOL_AIRBRUSH
210 #define AIPTEK_TOOL_BUTTON_ERASER_MODE			BTN_TOOL_RUBBER
211 #define AIPTEK_TOOL_BUTTON_MOUSE_MODE			BTN_TOOL_MOUSE
212 #define AIPTEK_TOOL_BUTTON_LENS_MODE			BTN_TOOL_LENS
213 
214 	/* Diagnostic message codes
215 	 */
216 #define AIPTEK_DIAGNOSTIC_NA				0
217 #define AIPTEK_DIAGNOSTIC_SENDING_RELATIVE_IN_ABSOLUTE	1
218 #define AIPTEK_DIAGNOSTIC_SENDING_ABSOLUTE_IN_RELATIVE	2
219 #define AIPTEK_DIAGNOSTIC_TOOL_DISALLOWED		3
220 
221 	/* Time to wait (in ms) to help mask hand jittering
222 	 * when pressing the stylus buttons.
223 	 */
224 #define AIPTEK_JITTER_DELAY_DEFAULT			50
225 
226 	/* Time to wait (in ms) in-between sending the tablet
227 	 * a command and beginning the process of reading the return
228 	 * sequence from the tablet.
229 	 */
230 #define AIPTEK_PROGRAMMABLE_DELAY_25		25
231 #define AIPTEK_PROGRAMMABLE_DELAY_50		50
232 #define AIPTEK_PROGRAMMABLE_DELAY_100		100
233 #define AIPTEK_PROGRAMMABLE_DELAY_200		200
234 #define AIPTEK_PROGRAMMABLE_DELAY_300		300
235 #define AIPTEK_PROGRAMMABLE_DELAY_400		400
236 #define AIPTEK_PROGRAMMABLE_DELAY_DEFAULT	AIPTEK_PROGRAMMABLE_DELAY_400
237 
238 	/* Mouse button programming
239 	 */
240 #define AIPTEK_MOUSE_LEFT_BUTTON		0x04
241 #define AIPTEK_MOUSE_RIGHT_BUTTON		0x08
242 #define AIPTEK_MOUSE_MIDDLE_BUTTON		0x10
243 
244 	/* Stylus button programming
245 	 */
246 #define AIPTEK_STYLUS_LOWER_BUTTON		0x08
247 #define AIPTEK_STYLUS_UPPER_BUTTON		0x10
248 
249 	/* Length of incoming packet from the tablet
250 	 */
251 #define AIPTEK_PACKET_LENGTH			8
252 
253 	/* We report in EV_MISC both the proximity and
254 	 * whether the report came from the stylus, tablet mouse
255 	 * or "unknown" -- Unknown when the tablet is in relative
256 	 * mode, because we only get report 1's.
257 	 */
258 #define AIPTEK_REPORT_TOOL_UNKNOWN		0x10
259 #define AIPTEK_REPORT_TOOL_STYLUS		0x20
260 #define AIPTEK_REPORT_TOOL_MOUSE		0x40
261 
262 static int programmableDelay = AIPTEK_PROGRAMMABLE_DELAY_DEFAULT;
263 static int jitterDelay = AIPTEK_JITTER_DELAY_DEFAULT;
264 
265 struct aiptek_features {
266 	int odmCode;		/* Tablet manufacturer code       */
267 	int modelCode;		/* Tablet model code (not unique) */
268 	int firmwareCode;	/* prom/eeprom version            */
269 	char usbPath[64 + 1];	/* device's physical usb path     */
270 };
271 
272 struct aiptek_settings {
273 	int pointerMode;	/* stylus-, mouse-only or either */
274 	int coordinateMode;	/* absolute/relative coords      */
275 	int toolMode;		/* pen, pencil, brush, etc. tool */
276 	int xTilt;		/* synthetic xTilt amount        */
277 	int yTilt;		/* synthetic yTilt amount        */
278 	int wheel;		/* synthetic wheel amount        */
279 	int stylusButtonUpper;	/* stylus upper btn delivers...  */
280 	int stylusButtonLower;	/* stylus lower btn delivers...  */
281 	int mouseButtonLeft;	/* mouse left btn delivers...    */
282 	int mouseButtonMiddle;	/* mouse middle btn delivers...  */
283 	int mouseButtonRight;	/* mouse right btn delivers...   */
284 	int programmableDelay;	/* delay for tablet programming  */
285 	int jitterDelay;	/* delay for hand jittering      */
286 };
287 
288 struct aiptek {
289 	struct input_dev *inputdev;		/* input device struct           */
290 	struct usb_interface *intf;		/* usb interface struct          */
291 	struct urb *urb;			/* urb for incoming reports      */
292 	dma_addr_t data_dma;			/* our dma stuffage              */
293 	struct aiptek_features features;	/* tablet's array of features    */
294 	struct aiptek_settings curSetting;	/* tablet's current programmable */
295 	struct aiptek_settings newSetting;	/* ... and new param settings    */
296 	unsigned int ifnum;			/* interface number for IO       */
297 	int diagnostic;				/* tablet diagnostic codes       */
298 	unsigned long eventCount;		/* event count                   */
299 	int inDelay;				/* jitter: in jitter delay?      */
300 	unsigned long endDelay;			/* jitter: time when delay ends  */
301 	int previousJitterable;			/* jitterable prev value     */
302 
303 	int lastMacro;				/* macro key to reset            */
304 	int previousToolMode;			/* pen, pencil, brush, etc. tool */
305 	unsigned char *data;			/* incoming packet data          */
306 };
307 
308 static const int eventTypes[] = {
309         EV_KEY, EV_ABS, EV_REL, EV_MSC,
310 };
311 
312 static const int absEvents[] = {
313         ABS_X, ABS_Y, ABS_PRESSURE, ABS_TILT_X, ABS_TILT_Y,
314         ABS_WHEEL, ABS_MISC,
315 };
316 
317 static const int relEvents[] = {
318         REL_X, REL_Y, REL_WHEEL,
319 };
320 
321 static const int buttonEvents[] = {
322 	BTN_LEFT, BTN_RIGHT, BTN_MIDDLE,
323 	BTN_TOOL_PEN, BTN_TOOL_RUBBER, BTN_TOOL_PENCIL, BTN_TOOL_AIRBRUSH,
324 	BTN_TOOL_BRUSH, BTN_TOOL_MOUSE, BTN_TOOL_LENS, BTN_TOUCH,
325 	BTN_STYLUS, BTN_STYLUS2,
326 };
327 
328 /*
329  * Permit easy lookup of keyboard events to send, versus
330  * the bitmap which comes from the tablet. This hides the
331  * issue that the F_keys are not sequentially numbered.
332  */
333 static const int macroKeyEvents[] = {
334 	KEY_ESC, KEY_F1, KEY_F2, KEY_F3, KEY_F4, KEY_F5,
335 	KEY_F6, KEY_F7, KEY_F8, KEY_F9, KEY_F10, KEY_F11,
336 	KEY_F12, KEY_F13, KEY_F14, KEY_F15, KEY_F16, KEY_F17,
337 	KEY_F18, KEY_F19, KEY_F20, KEY_F21, KEY_F22, KEY_F23,
338 	KEY_F24, KEY_STOP, KEY_AGAIN, KEY_PROPS, KEY_UNDO,
339 	KEY_FRONT, KEY_COPY, KEY_OPEN, KEY_PASTE, 0
340 };
341 
342 /***********************************************************************
343  * Map values to strings and back. Every map should have the following
344  * as its last element: { NULL, AIPTEK_INVALID_VALUE }.
345  */
346 #define AIPTEK_INVALID_VALUE	-1
347 
348 struct aiptek_map {
349 	const char *string;
350 	int value;
351 };
352 
353 static int map_str_to_val(const struct aiptek_map *map, const char *str, size_t count)
354 {
355 	const struct aiptek_map *p;
356 
357 	if (str[count - 1] == '\n')
358 		count--;
359 
360 	for (p = map; p->string; p++)
361 	        if (!strncmp(str, p->string, count))
362 			return p->value;
363 
364 	return AIPTEK_INVALID_VALUE;
365 }
366 
367 static const char *map_val_to_str(const struct aiptek_map *map, int val)
368 {
369 	const struct aiptek_map *p;
370 
371 	for (p = map; p->value != AIPTEK_INVALID_VALUE; p++)
372 		if (val == p->value)
373 			return p->string;
374 
375 	return "unknown";
376 }
377 
378 /***********************************************************************
379  * aiptek_irq can receive one of six potential reports.
380  * The documentation for each is in the body of the function.
381  *
382  * The tablet reports on several attributes per invocation of
383  * aiptek_irq. Because the Linux Input Event system allows the
384  * transmission of ONE attribute per input_report_xxx() call,
385  * collation has to be done on the other end to reconstitute
386  * a complete tablet report. Further, the number of Input Event reports
387  * submitted varies, depending on what USB report type, and circumstance.
388  * To deal with this, EV_MSC is used to indicate an 'end-of-report'
389  * message. This has been an undocumented convention understood by the kernel
390  * tablet driver and clients such as gpm and XFree86's tablet drivers.
391  *
392  * Of the information received from the tablet, the one piece I
393  * cannot transmit is the proximity bit (without resorting to an EV_MSC
394  * convention above.) I therefore have taken over REL_MISC and ABS_MISC
395  * (for relative and absolute reports, respectively) for communicating
396  * Proximity. Why two events? I thought it interesting to know if the
397  * Proximity event occurred while the tablet was in absolute or relative
398  * mode.
399  * Update: REL_MISC proved not to be such a good idea. With REL_MISC you
400  * get an event transmitted each time. ABS_MISC works better, since it
401  * can be set and re-set. Thus, only using ABS_MISC from now on.
402  *
403  * Other tablets use the notion of a certain minimum stylus pressure
404  * to infer proximity. While that could have been done, that is yet
405  * another 'by convention' behavior, the documentation for which
406  * would be spread between two (or more) pieces of software.
407  *
408  * EV_MSC usage was terminated for this purpose in Linux 2.5.x, and
409  * replaced with the input_sync() method (which emits EV_SYN.)
410  */
411 
412 static void aiptek_irq(struct urb *urb)
413 {
414 	struct aiptek *aiptek = urb->context;
415 	unsigned char *data = aiptek->data;
416 	struct input_dev *inputdev = aiptek->inputdev;
417 	struct usb_interface *intf = aiptek->intf;
418 	int jitterable = 0;
419 	int retval, macro, x, y, z, left, right, middle, p, dv, tip, bs, pck;
420 
421 	switch (urb->status) {
422 	case 0:
423 		/* Success */
424 		break;
425 
426 	case -ECONNRESET:
427 	case -ENOENT:
428 	case -ESHUTDOWN:
429 		/* This urb is terminated, clean up */
430 		dev_dbg(&intf->dev, "%s - urb shutting down with status: %d\n",
431 			__func__, urb->status);
432 		return;
433 
434 	default:
435 		dev_dbg(&intf->dev, "%s - nonzero urb status received: %d\n",
436 			__func__, urb->status);
437 		goto exit;
438 	}
439 
440 	/* See if we are in a delay loop -- throw out report if true.
441 	 */
442 	if (aiptek->inDelay == 1 && time_after(aiptek->endDelay, jiffies)) {
443 		goto exit;
444 	}
445 
446 	aiptek->inDelay = 0;
447 	aiptek->eventCount++;
448 
449 	/* Report 1 delivers relative coordinates with either a stylus
450 	 * or the mouse. You do not know, however, which input
451 	 * tool generated the event.
452 	 */
453 	if (data[0] == 1) {
454 		if (aiptek->curSetting.coordinateMode ==
455 		    AIPTEK_COORDINATE_ABSOLUTE_MODE) {
456 			aiptek->diagnostic =
457 			    AIPTEK_DIAGNOSTIC_SENDING_RELATIVE_IN_ABSOLUTE;
458 		} else {
459 			x = (signed char) data[2];
460 			y = (signed char) data[3];
461 
462 			/* jitterable keeps track of whether any button has been pressed.
463 			 * We're also using it to remap the physical mouse button mask
464 			 * to pseudo-settings. (We don't specifically care about it's
465 			 * value after moving/transposing mouse button bitmasks, except
466 			 * that a non-zero value indicates that one or more
467 			 * mouse button was pressed.)
468 			 */
469 			jitterable = data[1] & 0x07;
470 
471 			left = (data[1] & aiptek->curSetting.mouseButtonLeft >> 2) != 0 ? 1 : 0;
472 			right = (data[1] & aiptek->curSetting.mouseButtonRight >> 2) != 0 ? 1 : 0;
473 			middle = (data[1] & aiptek->curSetting.mouseButtonMiddle >> 2) != 0 ? 1 : 0;
474 
475 			input_report_key(inputdev, BTN_LEFT, left);
476 			input_report_key(inputdev, BTN_MIDDLE, middle);
477 			input_report_key(inputdev, BTN_RIGHT, right);
478 
479 			input_report_abs(inputdev, ABS_MISC,
480 					 1 | AIPTEK_REPORT_TOOL_UNKNOWN);
481 			input_report_rel(inputdev, REL_X, x);
482 			input_report_rel(inputdev, REL_Y, y);
483 
484 			/* Wheel support is in the form of a single-event
485 			 * firing.
486 			 */
487 			if (aiptek->curSetting.wheel != AIPTEK_WHEEL_DISABLE) {
488 				input_report_rel(inputdev, REL_WHEEL,
489 						 aiptek->curSetting.wheel);
490 				aiptek->curSetting.wheel = AIPTEK_WHEEL_DISABLE;
491 			}
492 			if (aiptek->lastMacro != -1) {
493 			        input_report_key(inputdev,
494 						 macroKeyEvents[aiptek->lastMacro], 0);
495 				aiptek->lastMacro = -1;
496 			}
497 			input_sync(inputdev);
498 		}
499 	}
500 	/* Report 2 is delivered only by the stylus, and delivers
501 	 * absolute coordinates.
502 	 */
503 	else if (data[0] == 2) {
504 		if (aiptek->curSetting.coordinateMode == AIPTEK_COORDINATE_RELATIVE_MODE) {
505 			aiptek->diagnostic = AIPTEK_DIAGNOSTIC_SENDING_ABSOLUTE_IN_RELATIVE;
506 		} else if (!AIPTEK_POINTER_ALLOW_STYLUS_MODE
507 			    (aiptek->curSetting.pointerMode)) {
508 				aiptek->diagnostic = AIPTEK_DIAGNOSTIC_TOOL_DISALLOWED;
509 		} else {
510 			x = get_unaligned_le16(data + 1);
511 			y = get_unaligned_le16(data + 3);
512 			z = get_unaligned_le16(data + 6);
513 
514 			dv = (data[5] & 0x01) != 0 ? 1 : 0;
515 			p = (data[5] & 0x02) != 0 ? 1 : 0;
516 			tip = (data[5] & 0x04) != 0 ? 1 : 0;
517 
518 			/* Use jitterable to re-arrange button masks
519 			 */
520 			jitterable = data[5] & 0x18;
521 
522 			bs = (data[5] & aiptek->curSetting.stylusButtonLower) != 0 ? 1 : 0;
523 			pck = (data[5] & aiptek->curSetting.stylusButtonUpper) != 0 ? 1 : 0;
524 
525 			/* dv indicates 'data valid' (e.g., the tablet is in sync
526 			 * and has delivered a "correct" report) We will ignore
527 			 * all 'bad' reports...
528 			 */
529 			if (dv != 0) {
530 				/* If the selected tool changed, reset the old
531 				 * tool key, and set the new one.
532 				 */
533 				if (aiptek->previousToolMode !=
534 				    aiptek->curSetting.toolMode) {
535 				        input_report_key(inputdev,
536 							 aiptek->previousToolMode, 0);
537 					input_report_key(inputdev,
538 							 aiptek->curSetting.toolMode,
539 							 1);
540 					aiptek->previousToolMode =
541 					          aiptek->curSetting.toolMode;
542 				}
543 
544 				if (p != 0) {
545 					input_report_abs(inputdev, ABS_X, x);
546 					input_report_abs(inputdev, ABS_Y, y);
547 					input_report_abs(inputdev, ABS_PRESSURE, z);
548 
549 					input_report_key(inputdev, BTN_TOUCH, tip);
550 					input_report_key(inputdev, BTN_STYLUS, bs);
551 					input_report_key(inputdev, BTN_STYLUS2, pck);
552 
553 					if (aiptek->curSetting.xTilt !=
554 					    AIPTEK_TILT_DISABLE) {
555 						input_report_abs(inputdev,
556 								 ABS_TILT_X,
557 								 aiptek->curSetting.xTilt);
558 					}
559 					if (aiptek->curSetting.yTilt != AIPTEK_TILT_DISABLE) {
560 						input_report_abs(inputdev,
561 								 ABS_TILT_Y,
562 								 aiptek->curSetting.yTilt);
563 					}
564 
565 					/* Wheel support is in the form of a single-event
566 					 * firing.
567 					 */
568 					if (aiptek->curSetting.wheel !=
569 					    AIPTEK_WHEEL_DISABLE) {
570 						input_report_abs(inputdev,
571 								 ABS_WHEEL,
572 								 aiptek->curSetting.wheel);
573 						aiptek->curSetting.wheel = AIPTEK_WHEEL_DISABLE;
574 					}
575 				}
576 				input_report_abs(inputdev, ABS_MISC, p | AIPTEK_REPORT_TOOL_STYLUS);
577 				if (aiptek->lastMacro != -1) {
578 			                input_report_key(inputdev,
579 							 macroKeyEvents[aiptek->lastMacro], 0);
580 					aiptek->lastMacro = -1;
581 				}
582 				input_sync(inputdev);
583 			}
584 		}
585 	}
586 	/* Report 3's come from the mouse in absolute mode.
587 	 */
588 	else if (data[0] == 3) {
589 		if (aiptek->curSetting.coordinateMode == AIPTEK_COORDINATE_RELATIVE_MODE) {
590 			aiptek->diagnostic = AIPTEK_DIAGNOSTIC_SENDING_ABSOLUTE_IN_RELATIVE;
591 		} else if (!AIPTEK_POINTER_ALLOW_MOUSE_MODE
592 			(aiptek->curSetting.pointerMode)) {
593 			aiptek->diagnostic = AIPTEK_DIAGNOSTIC_TOOL_DISALLOWED;
594 		} else {
595 			x = get_unaligned_le16(data + 1);
596 			y = get_unaligned_le16(data + 3);
597 
598 			jitterable = data[5] & 0x1c;
599 
600 			dv = (data[5] & 0x01) != 0 ? 1 : 0;
601 			p = (data[5] & 0x02) != 0 ? 1 : 0;
602 			left = (data[5] & aiptek->curSetting.mouseButtonLeft) != 0 ? 1 : 0;
603 			right = (data[5] & aiptek->curSetting.mouseButtonRight) != 0 ? 1 : 0;
604 			middle = (data[5] & aiptek->curSetting.mouseButtonMiddle) != 0 ? 1 : 0;
605 
606 			if (dv != 0) {
607 				/* If the selected tool changed, reset the old
608 				 * tool key, and set the new one.
609 				 */
610 				if (aiptek->previousToolMode !=
611 				    aiptek->curSetting.toolMode) {
612 				        input_report_key(inputdev,
613 							 aiptek->previousToolMode, 0);
614 					input_report_key(inputdev,
615 							 aiptek->curSetting.toolMode,
616 							 1);
617 					aiptek->previousToolMode =
618 					          aiptek->curSetting.toolMode;
619 				}
620 
621 				if (p != 0) {
622 					input_report_abs(inputdev, ABS_X, x);
623 					input_report_abs(inputdev, ABS_Y, y);
624 
625 					input_report_key(inputdev, BTN_LEFT, left);
626 					input_report_key(inputdev, BTN_MIDDLE, middle);
627 					input_report_key(inputdev, BTN_RIGHT, right);
628 
629 					/* Wheel support is in the form of a single-event
630 					 * firing.
631 					 */
632 					if (aiptek->curSetting.wheel != AIPTEK_WHEEL_DISABLE) {
633 						input_report_abs(inputdev,
634 								 ABS_WHEEL,
635 								 aiptek->curSetting.wheel);
636 						aiptek->curSetting.wheel = AIPTEK_WHEEL_DISABLE;
637 					}
638 				}
639 				input_report_abs(inputdev, ABS_MISC, p | AIPTEK_REPORT_TOOL_MOUSE);
640 				if (aiptek->lastMacro != -1) {
641 			                input_report_key(inputdev,
642 							 macroKeyEvents[aiptek->lastMacro], 0);
643 				        aiptek->lastMacro = -1;
644 				}
645 				input_sync(inputdev);
646 			}
647 		}
648 	}
649 	/* Report 4s come from the macro keys when pressed by stylus
650 	 */
651 	else if (data[0] == 4) {
652 		jitterable = data[1] & 0x18;
653 
654 		dv = (data[1] & 0x01) != 0 ? 1 : 0;
655 		p = (data[1] & 0x02) != 0 ? 1 : 0;
656 		tip = (data[1] & 0x04) != 0 ? 1 : 0;
657 		bs = (data[1] & aiptek->curSetting.stylusButtonLower) != 0 ? 1 : 0;
658 		pck = (data[1] & aiptek->curSetting.stylusButtonUpper) != 0 ? 1 : 0;
659 
660 		macro = dv && p && tip && !(data[3] & 1) ? (data[3] >> 1) : -1;
661 		z = get_unaligned_le16(data + 4);
662 
663 		if (dv) {
664 		        /* If the selected tool changed, reset the old
665 			 * tool key, and set the new one.
666 			 */
667 		        if (aiptek->previousToolMode !=
668 			    aiptek->curSetting.toolMode) {
669 			        input_report_key(inputdev,
670 						 aiptek->previousToolMode, 0);
671 				input_report_key(inputdev,
672 						 aiptek->curSetting.toolMode,
673 						 1);
674 				aiptek->previousToolMode =
675 				        aiptek->curSetting.toolMode;
676 			}
677 		}
678 
679 		if (aiptek->lastMacro != -1 && aiptek->lastMacro != macro) {
680 		        input_report_key(inputdev, macroKeyEvents[aiptek->lastMacro], 0);
681 			aiptek->lastMacro = -1;
682 		}
683 
684 		if (macro != -1 && macro != aiptek->lastMacro) {
685 			input_report_key(inputdev, macroKeyEvents[macro], 1);
686 			aiptek->lastMacro = macro;
687 		}
688 		input_report_abs(inputdev, ABS_MISC,
689 				 p | AIPTEK_REPORT_TOOL_STYLUS);
690 		input_sync(inputdev);
691 	}
692 	/* Report 5s come from the macro keys when pressed by mouse
693 	 */
694 	else if (data[0] == 5) {
695 		jitterable = data[1] & 0x1c;
696 
697 		dv = (data[1] & 0x01) != 0 ? 1 : 0;
698 		p = (data[1] & 0x02) != 0 ? 1 : 0;
699 		left = (data[1]& aiptek->curSetting.mouseButtonLeft) != 0 ? 1 : 0;
700 		right = (data[1] & aiptek->curSetting.mouseButtonRight) != 0 ? 1 : 0;
701 		middle = (data[1] & aiptek->curSetting.mouseButtonMiddle) != 0 ? 1 : 0;
702 		macro = dv && p && left && !(data[3] & 1) ? (data[3] >> 1) : 0;
703 
704 		if (dv) {
705 		        /* If the selected tool changed, reset the old
706 			 * tool key, and set the new one.
707 			 */
708 		        if (aiptek->previousToolMode !=
709 			    aiptek->curSetting.toolMode) {
710 		                input_report_key(inputdev,
711 						 aiptek->previousToolMode, 0);
712 			        input_report_key(inputdev,
713 						 aiptek->curSetting.toolMode, 1);
714 			        aiptek->previousToolMode = aiptek->curSetting.toolMode;
715 			}
716 		}
717 
718 		if (aiptek->lastMacro != -1 && aiptek->lastMacro != macro) {
719 		        input_report_key(inputdev, macroKeyEvents[aiptek->lastMacro], 0);
720 			aiptek->lastMacro = -1;
721 		}
722 
723 		if (macro != -1 && macro != aiptek->lastMacro) {
724 			input_report_key(inputdev, macroKeyEvents[macro], 1);
725 			aiptek->lastMacro = macro;
726 		}
727 
728 		input_report_abs(inputdev, ABS_MISC,
729 				 p | AIPTEK_REPORT_TOOL_MOUSE);
730 		input_sync(inputdev);
731 	}
732 	/* We have no idea which tool can generate a report 6. Theoretically,
733 	 * neither need to, having been given reports 4 & 5 for such use.
734 	 * However, report 6 is the 'official-looking' report for macroKeys;
735 	 * reports 4 & 5 supposively are used to support unnamed, unknown
736 	 * hat switches (which just so happen to be the macroKeys.)
737 	 */
738 	else if (data[0] == 6) {
739 		macro = get_unaligned_le16(data + 1);
740 		if (macro > 0) {
741 			input_report_key(inputdev, macroKeyEvents[macro - 1],
742 					 0);
743 		}
744 		if (macro < 25) {
745 			input_report_key(inputdev, macroKeyEvents[macro + 1],
746 					 0);
747 		}
748 
749 		/* If the selected tool changed, reset the old
750 		   tool key, and set the new one.
751 		*/
752 		if (aiptek->previousToolMode !=
753 		    aiptek->curSetting.toolMode) {
754 		        input_report_key(inputdev,
755 					 aiptek->previousToolMode, 0);
756 			input_report_key(inputdev,
757 					 aiptek->curSetting.toolMode,
758 					 1);
759 			aiptek->previousToolMode =
760 				aiptek->curSetting.toolMode;
761 		}
762 
763 		input_report_key(inputdev, macroKeyEvents[macro], 1);
764 		input_report_abs(inputdev, ABS_MISC,
765 				 1 | AIPTEK_REPORT_TOOL_UNKNOWN);
766 		input_sync(inputdev);
767 	} else {
768 		dev_dbg(&intf->dev, "Unknown report %d\n", data[0]);
769 	}
770 
771 	/* Jitter may occur when the user presses a button on the stlyus
772 	 * or the mouse. What we do to prevent that is wait 'x' milliseconds
773 	 * following a 'jitterable' event, which should give the hand some time
774 	 * stabilize itself.
775 	 *
776 	 * We just introduced aiptek->previousJitterable to carry forth the
777 	 * notion that jitter occurs when the button state changes from on to off:
778 	 * a person drawing, holding a button down is not subject to jittering.
779 	 * With that in mind, changing from upper button depressed to lower button
780 	 * WILL transition through a jitter delay.
781 	 */
782 
783 	if (aiptek->previousJitterable != jitterable &&
784 	    aiptek->curSetting.jitterDelay != 0 && aiptek->inDelay != 1) {
785 		aiptek->endDelay = jiffies +
786 		    ((aiptek->curSetting.jitterDelay * HZ) / 1000);
787 		aiptek->inDelay = 1;
788 	}
789 	aiptek->previousJitterable = jitterable;
790 
791 exit:
792 	retval = usb_submit_urb(urb, GFP_ATOMIC);
793 	if (retval != 0) {
794 		dev_err(&intf->dev,
795 			"%s - usb_submit_urb failed with result %d\n",
796 			__func__, retval);
797 	}
798 }
799 
800 /***********************************************************************
801  * These are the USB id's known so far. We do not identify them to
802  * specific Aiptek model numbers, because there has been overlaps,
803  * use, and reuse of id's in existing models. Certain models have
804  * been known to use more than one ID, indicative perhaps of
805  * manufacturing revisions. In any event, we consider these
806  * IDs to not be model-specific nor unique.
807  */
808 static const struct usb_device_id aiptek_ids[] = {
809 	{USB_DEVICE(USB_VENDOR_ID_AIPTEK, 0x01)},
810 	{USB_DEVICE(USB_VENDOR_ID_AIPTEK, 0x10)},
811 	{USB_DEVICE(USB_VENDOR_ID_AIPTEK, 0x20)},
812 	{USB_DEVICE(USB_VENDOR_ID_AIPTEK, 0x21)},
813 	{USB_DEVICE(USB_VENDOR_ID_AIPTEK, 0x22)},
814 	{USB_DEVICE(USB_VENDOR_ID_AIPTEK, 0x23)},
815 	{USB_DEVICE(USB_VENDOR_ID_AIPTEK, 0x24)},
816 	{USB_DEVICE(USB_VENDOR_ID_KYE, 0x5003)},
817 	{}
818 };
819 
820 MODULE_DEVICE_TABLE(usb, aiptek_ids);
821 
822 /***********************************************************************
823  * Open an instance of the tablet driver.
824  */
825 static int aiptek_open(struct input_dev *inputdev)
826 {
827 	struct aiptek *aiptek = input_get_drvdata(inputdev);
828 
829 	aiptek->urb->dev = interface_to_usbdev(aiptek->intf);
830 	if (usb_submit_urb(aiptek->urb, GFP_KERNEL) != 0)
831 		return -EIO;
832 
833 	return 0;
834 }
835 
836 /***********************************************************************
837  * Close an instance of the tablet driver.
838  */
839 static void aiptek_close(struct input_dev *inputdev)
840 {
841 	struct aiptek *aiptek = input_get_drvdata(inputdev);
842 
843 	usb_kill_urb(aiptek->urb);
844 }
845 
846 /***********************************************************************
847  * aiptek_set_report and aiptek_get_report() are borrowed from Linux 2.4.x,
848  * where they were known as usb_set_report and usb_get_report.
849  */
850 static int
851 aiptek_set_report(struct aiptek *aiptek,
852 		  unsigned char report_type,
853 		  unsigned char report_id, void *buffer, int size)
854 {
855 	struct usb_device *udev = interface_to_usbdev(aiptek->intf);
856 
857 	return usb_control_msg(udev,
858 			       usb_sndctrlpipe(udev, 0),
859 			       USB_REQ_SET_REPORT,
860 			       USB_TYPE_CLASS | USB_RECIP_INTERFACE |
861 			       USB_DIR_OUT, (report_type << 8) + report_id,
862 			       aiptek->ifnum, buffer, size, 5000);
863 }
864 
865 static int
866 aiptek_get_report(struct aiptek *aiptek,
867 		  unsigned char report_type,
868 		  unsigned char report_id, void *buffer, int size)
869 {
870 	struct usb_device *udev = interface_to_usbdev(aiptek->intf);
871 
872 	return usb_control_msg(udev,
873 			       usb_rcvctrlpipe(udev, 0),
874 			       USB_REQ_GET_REPORT,
875 			       USB_TYPE_CLASS | USB_RECIP_INTERFACE |
876 			       USB_DIR_IN, (report_type << 8) + report_id,
877 			       aiptek->ifnum, buffer, size, 5000);
878 }
879 
880 /***********************************************************************
881  * Send a command to the tablet.
882  */
883 static int
884 aiptek_command(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 ((ret =
899 	     aiptek_set_report(aiptek, 3, 2, buf, sizeof_buf)) != sizeof_buf) {
900 		dev_dbg(&aiptek->intf->dev,
901 			"aiptek_program: failed, tried to send: 0x%02x 0x%02x\n",
902 			command, data);
903 	}
904 	kfree(buf);
905 	return ret < 0 ? ret : 0;
906 }
907 
908 /***********************************************************************
909  * Retrieve information from the tablet. Querying info is defined as first
910  * sending the {command,data} sequence as a command, followed by a wait
911  * (aka, "programmaticDelay") and then a "read" request.
912  */
913 static int
914 aiptek_query(struct aiptek *aiptek, unsigned char command, unsigned char data)
915 {
916 	const int sizeof_buf = 3 * sizeof(u8);
917 	int ret;
918 	u8 *buf;
919 
920 	buf = kmalloc(sizeof_buf, GFP_KERNEL);
921 	if (!buf)
922 		return -ENOMEM;
923 
924 	buf[0] = 2;
925 	buf[1] = command;
926 	buf[2] = data;
927 
928 	if (aiptek_command(aiptek, command, data) != 0) {
929 		kfree(buf);
930 		return -EIO;
931 	}
932 	msleep(aiptek->curSetting.programmableDelay);
933 
934 	if ((ret =
935 	     aiptek_get_report(aiptek, 3, 2, buf, sizeof_buf)) != sizeof_buf) {
936 		dev_dbg(&aiptek->intf->dev,
937 			"aiptek_query failed: returned 0x%02x 0x%02x 0x%02x\n",
938 			buf[0], buf[1], buf[2]);
939 		ret = -EIO;
940 	} else {
941 		ret = get_unaligned_le16(buf + 1);
942 	}
943 	kfree(buf);
944 	return ret;
945 }
946 
947 /***********************************************************************
948  * Program the tablet into either absolute or relative mode.
949  * We also get information about the tablet's size.
950  */
951 static int aiptek_program_tablet(struct aiptek *aiptek)
952 {
953 	int ret;
954 	/* Execute Resolution500LPI */
955 	if ((ret = aiptek_command(aiptek, 0x18, 0x04)) < 0)
956 		return ret;
957 
958 	/* Query getModelCode */
959 	if ((ret = aiptek_query(aiptek, 0x02, 0x00)) < 0)
960 		return ret;
961 	aiptek->features.modelCode = ret & 0xff;
962 
963 	/* Query getODMCode */
964 	if ((ret = aiptek_query(aiptek, 0x03, 0x00)) < 0)
965 		return ret;
966 	aiptek->features.odmCode = ret;
967 
968 	/* Query getFirmwareCode */
969 	if ((ret = aiptek_query(aiptek, 0x04, 0x00)) < 0)
970 		return ret;
971 	aiptek->features.firmwareCode = ret;
972 
973 	/* Query getXextension */
974 	if ((ret = aiptek_query(aiptek, 0x01, 0x00)) < 0)
975 		return ret;
976 	input_set_abs_params(aiptek->inputdev, ABS_X, 0, ret - 1, 0, 0);
977 
978 	/* Query getYextension */
979 	if ((ret = aiptek_query(aiptek, 0x01, 0x01)) < 0)
980 		return ret;
981 	input_set_abs_params(aiptek->inputdev, ABS_Y, 0, ret - 1, 0, 0);
982 
983 	/* Query getPressureLevels */
984 	if ((ret = aiptek_query(aiptek, 0x08, 0x00)) < 0)
985 		return ret;
986 	input_set_abs_params(aiptek->inputdev, ABS_PRESSURE, 0, ret - 1, 0, 0);
987 
988 	/* Depending on whether we are in absolute or relative mode, we will
989 	 * do a switchToTablet(absolute) or switchToMouse(relative) command.
990 	 */
991 	if (aiptek->curSetting.coordinateMode ==
992 	    AIPTEK_COORDINATE_ABSOLUTE_MODE) {
993 		/* Execute switchToTablet */
994 		if ((ret = aiptek_command(aiptek, 0x10, 0x01)) < 0) {
995 			return ret;
996 		}
997 	} else {
998 		/* Execute switchToMouse */
999 		if ((ret = aiptek_command(aiptek, 0x10, 0x00)) < 0) {
1000 			return ret;
1001 		}
1002 	}
1003 
1004 	/* Enable the macro keys */
1005 	if ((ret = aiptek_command(aiptek, 0x11, 0x02)) < 0)
1006 		return ret;
1007 #if 0
1008 	/* Execute FilterOn */
1009 	if ((ret = aiptek_command(aiptek, 0x17, 0x00)) < 0)
1010 		return ret;
1011 #endif
1012 
1013 	/* Execute AutoGainOn */
1014 	if ((ret = aiptek_command(aiptek, 0x12, 0xff)) < 0)
1015 		return ret;
1016 
1017 	/* Reset the eventCount, so we track events from last (re)programming
1018 	 */
1019 	aiptek->diagnostic = AIPTEK_DIAGNOSTIC_NA;
1020 	aiptek->eventCount = 0;
1021 
1022 	return 0;
1023 }
1024 
1025 /***********************************************************************
1026  * Sysfs functions. Sysfs prefers that individually-tunable parameters
1027  * exist in their separate pseudo-files. Summary data that is immutable
1028  * may exist in a singular file so long as you don't define a writeable
1029  * interface.
1030  */
1031 
1032 /***********************************************************************
1033  * support the 'size' file -- display support
1034  */
1035 static ssize_t show_tabletSize(struct device *dev, struct device_attribute *attr, char *buf)
1036 {
1037 	struct aiptek *aiptek = dev_get_drvdata(dev);
1038 
1039 	return sysfs_emit(buf, "%dx%d\n",
1040 			  input_abs_get_max(aiptek->inputdev, ABS_X) + 1,
1041 			  input_abs_get_max(aiptek->inputdev, ABS_Y) + 1);
1042 }
1043 
1044 /* These structs define the sysfs files, param #1 is the name of the
1045  * file, param 2 is the file permissions, param 3 & 4 are to the
1046  * output generator and input parser routines. Absence of a routine is
1047  * permitted -- it only means can't either 'cat' the file, or send data
1048  * to it.
1049  */
1050 static DEVICE_ATTR(size, S_IRUGO, show_tabletSize, NULL);
1051 
1052 /***********************************************************************
1053  * support routines for the 'pointer_mode' file. Note that this file
1054  * both displays current setting and allows reprogramming.
1055  */
1056 static struct aiptek_map pointer_mode_map[] = {
1057 	{ "stylus",	AIPTEK_POINTER_ONLY_STYLUS_MODE },
1058 	{ "mouse",	AIPTEK_POINTER_ONLY_MOUSE_MODE },
1059 	{ "either",	AIPTEK_POINTER_EITHER_MODE },
1060 	{ NULL,		AIPTEK_INVALID_VALUE }
1061 };
1062 
1063 static ssize_t show_tabletPointerMode(struct device *dev, struct device_attribute *attr, char *buf)
1064 {
1065 	struct aiptek *aiptek = dev_get_drvdata(dev);
1066 
1067 	return sysfs_emit(buf, "%s\n", map_val_to_str(pointer_mode_map,
1068 						      aiptek->curSetting.pointerMode));
1069 }
1070 
1071 static ssize_t
1072 store_tabletPointerMode(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1073 {
1074 	struct aiptek *aiptek = dev_get_drvdata(dev);
1075 	int new_mode = map_str_to_val(pointer_mode_map, buf, count);
1076 
1077 	if (new_mode == AIPTEK_INVALID_VALUE)
1078 		return -EINVAL;
1079 
1080 	aiptek->newSetting.pointerMode = new_mode;
1081 	return count;
1082 }
1083 
1084 static DEVICE_ATTR(pointer_mode,
1085 		   S_IRUGO | S_IWUSR,
1086 		   show_tabletPointerMode, store_tabletPointerMode);
1087 
1088 /***********************************************************************
1089  * support routines for the 'coordinate_mode' file. Note that this file
1090  * both displays current setting and allows reprogramming.
1091  */
1092 
1093 static struct aiptek_map coordinate_mode_map[] = {
1094 	{ "absolute",	AIPTEK_COORDINATE_ABSOLUTE_MODE },
1095 	{ "relative",	AIPTEK_COORDINATE_RELATIVE_MODE },
1096 	{ NULL,		AIPTEK_INVALID_VALUE }
1097 };
1098 
1099 static ssize_t show_tabletCoordinateMode(struct device *dev, struct device_attribute *attr, char *buf)
1100 {
1101 	struct aiptek *aiptek = dev_get_drvdata(dev);
1102 
1103 	return sysfs_emit(buf, "%s\n", map_val_to_str(coordinate_mode_map,
1104 						      aiptek->curSetting.coordinateMode));
1105 }
1106 
1107 static ssize_t
1108 store_tabletCoordinateMode(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1109 {
1110 	struct aiptek *aiptek = dev_get_drvdata(dev);
1111 	int new_mode = map_str_to_val(coordinate_mode_map, buf, count);
1112 
1113 	if (new_mode == AIPTEK_INVALID_VALUE)
1114 		return -EINVAL;
1115 
1116 	aiptek->newSetting.coordinateMode = new_mode;
1117 	return count;
1118 }
1119 
1120 static DEVICE_ATTR(coordinate_mode,
1121 		   S_IRUGO | S_IWUSR,
1122 		   show_tabletCoordinateMode, store_tabletCoordinateMode);
1123 
1124 /***********************************************************************
1125  * support routines for the 'tool_mode' file. Note that this file
1126  * both displays current setting and allows reprogramming.
1127  */
1128 
1129 static struct aiptek_map tool_mode_map[] = {
1130 	{ "mouse",	AIPTEK_TOOL_BUTTON_MOUSE_MODE },
1131 	{ "eraser",	AIPTEK_TOOL_BUTTON_ERASER_MODE },
1132 	{ "pencil",	AIPTEK_TOOL_BUTTON_PENCIL_MODE },
1133 	{ "pen",	AIPTEK_TOOL_BUTTON_PEN_MODE },
1134 	{ "brush",	AIPTEK_TOOL_BUTTON_BRUSH_MODE },
1135 	{ "airbrush",	AIPTEK_TOOL_BUTTON_AIRBRUSH_MODE },
1136 	{ "lens",	AIPTEK_TOOL_BUTTON_LENS_MODE },
1137 	{ NULL,		AIPTEK_INVALID_VALUE }
1138 };
1139 
1140 static ssize_t show_tabletToolMode(struct device *dev, struct device_attribute *attr, char *buf)
1141 {
1142 	struct aiptek *aiptek = dev_get_drvdata(dev);
1143 
1144 	return sysfs_emit(buf, "%s\n", map_val_to_str(tool_mode_map,
1145 						      aiptek->curSetting.toolMode));
1146 }
1147 
1148 static ssize_t
1149 store_tabletToolMode(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1150 {
1151 	struct aiptek *aiptek = dev_get_drvdata(dev);
1152 	int new_mode = map_str_to_val(tool_mode_map, buf, count);
1153 
1154 	if (new_mode == AIPTEK_INVALID_VALUE)
1155 		return -EINVAL;
1156 
1157 	aiptek->newSetting.toolMode = new_mode;
1158 	return count;
1159 }
1160 
1161 static DEVICE_ATTR(tool_mode,
1162 		   S_IRUGO | S_IWUSR,
1163 		   show_tabletToolMode, store_tabletToolMode);
1164 
1165 /***********************************************************************
1166  * support routines for the 'xtilt' file. Note that this file
1167  * both displays current setting and allows reprogramming.
1168  */
1169 static ssize_t show_tabletXtilt(struct device *dev, struct device_attribute *attr, char *buf)
1170 {
1171 	struct aiptek *aiptek = dev_get_drvdata(dev);
1172 
1173 	if (aiptek->curSetting.xTilt == AIPTEK_TILT_DISABLE) {
1174 		return sysfs_emit(buf, "disable\n");
1175 	} else {
1176 		return sysfs_emit(buf, "%d\n", aiptek->curSetting.xTilt);
1177 	}
1178 }
1179 
1180 static ssize_t
1181 store_tabletXtilt(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1182 {
1183 	struct aiptek *aiptek = dev_get_drvdata(dev);
1184 	int x;
1185 
1186 	if (kstrtoint(buf, 10, &x)) {
1187 		size_t len = buf[count - 1] == '\n' ? count - 1 : count;
1188 
1189 		if (strncmp(buf, "disable", len))
1190 			return -EINVAL;
1191 
1192 		aiptek->newSetting.xTilt = AIPTEK_TILT_DISABLE;
1193 	} else {
1194 		if (x < AIPTEK_TILT_MIN || x > AIPTEK_TILT_MAX)
1195 			return -EINVAL;
1196 
1197 		aiptek->newSetting.xTilt = x;
1198 	}
1199 
1200 	return count;
1201 }
1202 
1203 static DEVICE_ATTR(xtilt,
1204 		   S_IRUGO | S_IWUSR, show_tabletXtilt, store_tabletXtilt);
1205 
1206 /***********************************************************************
1207  * support routines for the 'ytilt' file. Note that this file
1208  * both displays current setting and allows reprogramming.
1209  */
1210 static ssize_t show_tabletYtilt(struct device *dev, struct device_attribute *attr, char *buf)
1211 {
1212 	struct aiptek *aiptek = dev_get_drvdata(dev);
1213 
1214 	if (aiptek->curSetting.yTilt == AIPTEK_TILT_DISABLE) {
1215 		return sysfs_emit(buf, "disable\n");
1216 	} else {
1217 		return sysfs_emit(buf, "%d\n", aiptek->curSetting.yTilt);
1218 	}
1219 }
1220 
1221 static ssize_t
1222 store_tabletYtilt(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1223 {
1224 	struct aiptek *aiptek = dev_get_drvdata(dev);
1225 	int y;
1226 
1227 	if (kstrtoint(buf, 10, &y)) {
1228 		size_t len = buf[count - 1] == '\n' ? count - 1 : count;
1229 
1230 		if (strncmp(buf, "disable", len))
1231 			return -EINVAL;
1232 
1233 		aiptek->newSetting.yTilt = AIPTEK_TILT_DISABLE;
1234 	} else {
1235 		if (y < AIPTEK_TILT_MIN || y > AIPTEK_TILT_MAX)
1236 			return -EINVAL;
1237 
1238 		aiptek->newSetting.yTilt = y;
1239 	}
1240 
1241 	return count;
1242 }
1243 
1244 static DEVICE_ATTR(ytilt,
1245 		   S_IRUGO | S_IWUSR, show_tabletYtilt, store_tabletYtilt);
1246 
1247 /***********************************************************************
1248  * support routines for the 'jitter' file. Note that this file
1249  * both displays current setting and allows reprogramming.
1250  */
1251 static ssize_t show_tabletJitterDelay(struct device *dev, struct device_attribute *attr, char *buf)
1252 {
1253 	struct aiptek *aiptek = dev_get_drvdata(dev);
1254 
1255 	return sysfs_emit(buf, "%d\n", aiptek->curSetting.jitterDelay);
1256 }
1257 
1258 static ssize_t
1259 store_tabletJitterDelay(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1260 {
1261 	struct aiptek *aiptek = dev_get_drvdata(dev);
1262 	int err, j;
1263 
1264 	err = kstrtoint(buf, 10, &j);
1265 	if (err)
1266 		return err;
1267 
1268 	aiptek->newSetting.jitterDelay = j;
1269 	return count;
1270 }
1271 
1272 static DEVICE_ATTR(jitter,
1273 		   S_IRUGO | S_IWUSR,
1274 		   show_tabletJitterDelay, store_tabletJitterDelay);
1275 
1276 /***********************************************************************
1277  * support routines for the 'delay' file. Note that this file
1278  * both displays current setting and allows reprogramming.
1279  */
1280 static ssize_t show_tabletProgrammableDelay(struct device *dev, struct device_attribute *attr, char *buf)
1281 {
1282 	struct aiptek *aiptek = dev_get_drvdata(dev);
1283 
1284 	return sysfs_emit(buf, "%d\n", aiptek->curSetting.programmableDelay);
1285 }
1286 
1287 static ssize_t
1288 store_tabletProgrammableDelay(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1289 {
1290 	struct aiptek *aiptek = dev_get_drvdata(dev);
1291 	int err, d;
1292 
1293 	err = kstrtoint(buf, 10, &d);
1294 	if (err)
1295 		return err;
1296 
1297 	aiptek->newSetting.programmableDelay = d;
1298 	return count;
1299 }
1300 
1301 static DEVICE_ATTR(delay,
1302 		   S_IRUGO | S_IWUSR,
1303 		   show_tabletProgrammableDelay, store_tabletProgrammableDelay);
1304 
1305 /***********************************************************************
1306  * support routines for the 'event_count' file. Note that this file
1307  * only displays current setting.
1308  */
1309 static ssize_t show_tabletEventsReceived(struct device *dev, struct device_attribute *attr, char *buf)
1310 {
1311 	struct aiptek *aiptek = dev_get_drvdata(dev);
1312 
1313 	return sysfs_emit(buf, "%ld\n", aiptek->eventCount);
1314 }
1315 
1316 static DEVICE_ATTR(event_count, S_IRUGO, show_tabletEventsReceived, NULL);
1317 
1318 /***********************************************************************
1319  * support routines for the 'diagnostic' file. Note that this file
1320  * only displays current setting.
1321  */
1322 static ssize_t show_tabletDiagnosticMessage(struct device *dev, struct device_attribute *attr, char *buf)
1323 {
1324 	struct aiptek *aiptek = dev_get_drvdata(dev);
1325 	char *retMsg;
1326 
1327 	switch (aiptek->diagnostic) {
1328 	case AIPTEK_DIAGNOSTIC_NA:
1329 		retMsg = "no errors\n";
1330 		break;
1331 
1332 	case AIPTEK_DIAGNOSTIC_SENDING_RELATIVE_IN_ABSOLUTE:
1333 		retMsg = "Error: receiving relative reports\n";
1334 		break;
1335 
1336 	case AIPTEK_DIAGNOSTIC_SENDING_ABSOLUTE_IN_RELATIVE:
1337 		retMsg = "Error: receiving absolute reports\n";
1338 		break;
1339 
1340 	case AIPTEK_DIAGNOSTIC_TOOL_DISALLOWED:
1341 		if (aiptek->curSetting.pointerMode ==
1342 		    AIPTEK_POINTER_ONLY_MOUSE_MODE) {
1343 			retMsg = "Error: receiving stylus reports\n";
1344 		} else {
1345 			retMsg = "Error: receiving mouse reports\n";
1346 		}
1347 		break;
1348 
1349 	default:
1350 		return 0;
1351 	}
1352 	return sysfs_emit(buf, retMsg);
1353 }
1354 
1355 static DEVICE_ATTR(diagnostic, S_IRUGO, show_tabletDiagnosticMessage, NULL);
1356 
1357 /***********************************************************************
1358  * support routines for the 'stylus_upper' file. Note that this file
1359  * both displays current setting and allows for setting changing.
1360  */
1361 
1362 static struct aiptek_map stylus_button_map[] = {
1363 	{ "upper",	AIPTEK_STYLUS_UPPER_BUTTON },
1364 	{ "lower",	AIPTEK_STYLUS_LOWER_BUTTON },
1365 	{ NULL,		AIPTEK_INVALID_VALUE }
1366 };
1367 
1368 static ssize_t show_tabletStylusUpper(struct device *dev, struct device_attribute *attr, char *buf)
1369 {
1370 	struct aiptek *aiptek = dev_get_drvdata(dev);
1371 
1372 	return sysfs_emit(buf, "%s\n", map_val_to_str(stylus_button_map,
1373 						      aiptek->curSetting.stylusButtonUpper));
1374 }
1375 
1376 static ssize_t
1377 store_tabletStylusUpper(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1378 {
1379 	struct aiptek *aiptek = dev_get_drvdata(dev);
1380 	int new_button = map_str_to_val(stylus_button_map, buf, count);
1381 
1382 	if (new_button == AIPTEK_INVALID_VALUE)
1383 		return -EINVAL;
1384 
1385 	aiptek->newSetting.stylusButtonUpper = new_button;
1386 	return count;
1387 }
1388 
1389 static DEVICE_ATTR(stylus_upper,
1390 		   S_IRUGO | S_IWUSR,
1391 		   show_tabletStylusUpper, store_tabletStylusUpper);
1392 
1393 /***********************************************************************
1394  * support routines for the 'stylus_lower' file. Note that this file
1395  * both displays current setting and allows for setting changing.
1396  */
1397 
1398 static ssize_t show_tabletStylusLower(struct device *dev, struct device_attribute *attr, char *buf)
1399 {
1400 	struct aiptek *aiptek = dev_get_drvdata(dev);
1401 
1402 	return sysfs_emit(buf, "%s\n", map_val_to_str(stylus_button_map,
1403 						      aiptek->curSetting.stylusButtonLower));
1404 }
1405 
1406 static ssize_t
1407 store_tabletStylusLower(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1408 {
1409 	struct aiptek *aiptek = dev_get_drvdata(dev);
1410 	int new_button = map_str_to_val(stylus_button_map, buf, count);
1411 
1412 	if (new_button == AIPTEK_INVALID_VALUE)
1413 		return -EINVAL;
1414 
1415 	aiptek->newSetting.stylusButtonLower = new_button;
1416 	return count;
1417 }
1418 
1419 static DEVICE_ATTR(stylus_lower,
1420 		   S_IRUGO | S_IWUSR,
1421 		   show_tabletStylusLower, store_tabletStylusLower);
1422 
1423 /***********************************************************************
1424  * support routines for the 'mouse_left' file. Note that this file
1425  * both displays current setting and allows for setting changing.
1426  */
1427 
1428 static struct aiptek_map mouse_button_map[] = {
1429 	{ "left",	AIPTEK_MOUSE_LEFT_BUTTON },
1430 	{ "middle",	AIPTEK_MOUSE_MIDDLE_BUTTON },
1431 	{ "right",	AIPTEK_MOUSE_RIGHT_BUTTON },
1432 	{ NULL,		AIPTEK_INVALID_VALUE }
1433 };
1434 
1435 static ssize_t show_tabletMouseLeft(struct device *dev, struct device_attribute *attr, char *buf)
1436 {
1437 	struct aiptek *aiptek = dev_get_drvdata(dev);
1438 
1439 	return sysfs_emit(buf, "%s\n", map_val_to_str(mouse_button_map,
1440 						      aiptek->curSetting.mouseButtonLeft));
1441 }
1442 
1443 static ssize_t
1444 store_tabletMouseLeft(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1445 {
1446 	struct aiptek *aiptek = dev_get_drvdata(dev);
1447 	int new_button = map_str_to_val(mouse_button_map, buf, count);
1448 
1449 	if (new_button == AIPTEK_INVALID_VALUE)
1450 		return -EINVAL;
1451 
1452 	aiptek->newSetting.mouseButtonLeft = new_button;
1453 	return count;
1454 }
1455 
1456 static DEVICE_ATTR(mouse_left,
1457 		   S_IRUGO | S_IWUSR,
1458 		   show_tabletMouseLeft, store_tabletMouseLeft);
1459 
1460 /***********************************************************************
1461  * support routines for the 'mouse_middle' file. Note that this file
1462  * both displays current setting and allows for setting changing.
1463  */
1464 static ssize_t show_tabletMouseMiddle(struct device *dev, struct device_attribute *attr, char *buf)
1465 {
1466 	struct aiptek *aiptek = dev_get_drvdata(dev);
1467 
1468 	return sysfs_emit(buf, "%s\n", map_val_to_str(mouse_button_map,
1469 						      aiptek->curSetting.mouseButtonMiddle));
1470 }
1471 
1472 static ssize_t
1473 store_tabletMouseMiddle(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1474 {
1475 	struct aiptek *aiptek = dev_get_drvdata(dev);
1476 	int new_button = map_str_to_val(mouse_button_map, buf, count);
1477 
1478 	if (new_button == AIPTEK_INVALID_VALUE)
1479 		return -EINVAL;
1480 
1481 	aiptek->newSetting.mouseButtonMiddle = new_button;
1482 	return count;
1483 }
1484 
1485 static DEVICE_ATTR(mouse_middle,
1486 		   S_IRUGO | S_IWUSR,
1487 		   show_tabletMouseMiddle, store_tabletMouseMiddle);
1488 
1489 /***********************************************************************
1490  * support routines for the 'mouse_right' file. Note that this file
1491  * both displays current setting and allows for setting changing.
1492  */
1493 static ssize_t show_tabletMouseRight(struct device *dev, struct device_attribute *attr, char *buf)
1494 {
1495 	struct aiptek *aiptek = dev_get_drvdata(dev);
1496 
1497 	return sysfs_emit(buf, "%s\n", map_val_to_str(mouse_button_map,
1498 						      aiptek->curSetting.mouseButtonRight));
1499 }
1500 
1501 static ssize_t
1502 store_tabletMouseRight(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1503 {
1504 	struct aiptek *aiptek = dev_get_drvdata(dev);
1505 	int new_button = map_str_to_val(mouse_button_map, buf, count);
1506 
1507 	if (new_button == AIPTEK_INVALID_VALUE)
1508 		return -EINVAL;
1509 
1510 	aiptek->newSetting.mouseButtonRight = new_button;
1511 	return count;
1512 }
1513 
1514 static DEVICE_ATTR(mouse_right,
1515 		   S_IRUGO | S_IWUSR,
1516 		   show_tabletMouseRight, store_tabletMouseRight);
1517 
1518 /***********************************************************************
1519  * support routines for the 'wheel' file. Note that this file
1520  * both displays current setting and allows for setting changing.
1521  */
1522 static ssize_t show_tabletWheel(struct device *dev, struct device_attribute *attr, char *buf)
1523 {
1524 	struct aiptek *aiptek = dev_get_drvdata(dev);
1525 
1526 	if (aiptek->curSetting.wheel == AIPTEK_WHEEL_DISABLE) {
1527 		return sysfs_emit(buf, "disable\n");
1528 	} else {
1529 		return sysfs_emit(buf, "%d\n", aiptek->curSetting.wheel);
1530 	}
1531 }
1532 
1533 static ssize_t
1534 store_tabletWheel(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1535 {
1536 	struct aiptek *aiptek = dev_get_drvdata(dev);
1537 	int err, w;
1538 
1539 	err = kstrtoint(buf, 10, &w);
1540 	if (err)
1541 		return err;
1542 
1543 	aiptek->newSetting.wheel = w;
1544 	return count;
1545 }
1546 
1547 static DEVICE_ATTR(wheel,
1548 		   S_IRUGO | S_IWUSR, show_tabletWheel, store_tabletWheel);
1549 
1550 /***********************************************************************
1551  * support routines for the 'execute' file. Note that this file
1552  * both displays current setting and allows for setting changing.
1553  */
1554 static ssize_t show_tabletExecute(struct device *dev, struct device_attribute *attr, char *buf)
1555 {
1556 	/* There is nothing useful to display, so a one-line manual
1557 	 * is in order...
1558 	 */
1559 	return sysfs_emit(buf, "Write anything to this file to program your tablet.\n");
1560 }
1561 
1562 static ssize_t
1563 store_tabletExecute(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1564 {
1565 	struct aiptek *aiptek = dev_get_drvdata(dev);
1566 
1567 	/* We do not care what you write to this file. Merely the action
1568 	 * of writing to this file triggers a tablet reprogramming.
1569 	 */
1570 	memcpy(&aiptek->curSetting, &aiptek->newSetting,
1571 	       sizeof(struct aiptek_settings));
1572 
1573 	if (aiptek_program_tablet(aiptek) < 0)
1574 		return -EIO;
1575 
1576 	return count;
1577 }
1578 
1579 static DEVICE_ATTR(execute,
1580 		   S_IRUGO | S_IWUSR, show_tabletExecute, store_tabletExecute);
1581 
1582 /***********************************************************************
1583  * support routines for the 'odm_code' file. Note that this file
1584  * only displays current setting.
1585  */
1586 static ssize_t show_tabletODMCode(struct device *dev, struct device_attribute *attr, char *buf)
1587 {
1588 	struct aiptek *aiptek = dev_get_drvdata(dev);
1589 
1590 	return sysfs_emit(buf, "0x%04x\n", aiptek->features.odmCode);
1591 }
1592 
1593 static DEVICE_ATTR(odm_code, S_IRUGO, show_tabletODMCode, NULL);
1594 
1595 /***********************************************************************
1596  * support routines for the 'model_code' file. Note that this file
1597  * only displays current setting.
1598  */
1599 static ssize_t show_tabletModelCode(struct device *dev, struct device_attribute *attr, char *buf)
1600 {
1601 	struct aiptek *aiptek = dev_get_drvdata(dev);
1602 
1603 	return sysfs_emit(buf, "0x%04x\n", aiptek->features.modelCode);
1604 }
1605 
1606 static DEVICE_ATTR(model_code, S_IRUGO, show_tabletModelCode, NULL);
1607 
1608 /***********************************************************************
1609  * support routines for the 'firmware_code' file. Note that this file
1610  * only displays current setting.
1611  */
1612 static ssize_t show_firmwareCode(struct device *dev, struct device_attribute *attr, char *buf)
1613 {
1614 	struct aiptek *aiptek = dev_get_drvdata(dev);
1615 
1616 	return sysfs_emit(buf, "%04x\n", aiptek->features.firmwareCode);
1617 }
1618 
1619 static DEVICE_ATTR(firmware_code, S_IRUGO, show_firmwareCode, NULL);
1620 
1621 static struct attribute *aiptek_attributes[] = {
1622 	&dev_attr_size.attr,
1623 	&dev_attr_pointer_mode.attr,
1624 	&dev_attr_coordinate_mode.attr,
1625 	&dev_attr_tool_mode.attr,
1626 	&dev_attr_xtilt.attr,
1627 	&dev_attr_ytilt.attr,
1628 	&dev_attr_jitter.attr,
1629 	&dev_attr_delay.attr,
1630 	&dev_attr_event_count.attr,
1631 	&dev_attr_diagnostic.attr,
1632 	&dev_attr_odm_code.attr,
1633 	&dev_attr_model_code.attr,
1634 	&dev_attr_firmware_code.attr,
1635 	&dev_attr_stylus_lower.attr,
1636 	&dev_attr_stylus_upper.attr,
1637 	&dev_attr_mouse_left.attr,
1638 	&dev_attr_mouse_middle.attr,
1639 	&dev_attr_mouse_right.attr,
1640 	&dev_attr_wheel.attr,
1641 	&dev_attr_execute.attr,
1642 	NULL
1643 };
1644 
1645 static const struct attribute_group aiptek_attribute_group = {
1646 	.attrs	= aiptek_attributes,
1647 };
1648 
1649 /***********************************************************************
1650  * This routine is called when a tablet has been identified. It basically
1651  * sets up the tablet and the driver's internal structures.
1652  */
1653 static int
1654 aiptek_probe(struct usb_interface *intf, const struct usb_device_id *id)
1655 {
1656 	struct usb_device *usbdev = interface_to_usbdev(intf);
1657 	struct usb_endpoint_descriptor *endpoint;
1658 	struct aiptek *aiptek;
1659 	struct input_dev *inputdev;
1660 	int i;
1661 	int speeds[] = { 0,
1662 		AIPTEK_PROGRAMMABLE_DELAY_50,
1663 		AIPTEK_PROGRAMMABLE_DELAY_400,
1664 		AIPTEK_PROGRAMMABLE_DELAY_25,
1665 		AIPTEK_PROGRAMMABLE_DELAY_100,
1666 		AIPTEK_PROGRAMMABLE_DELAY_200,
1667 		AIPTEK_PROGRAMMABLE_DELAY_300
1668 	};
1669 	int err = -ENOMEM;
1670 
1671 	/* programmableDelay is where the command-line specified
1672 	 * delay is kept. We make it the first element of speeds[],
1673 	 * so therefore, your override speed is tried first, then the
1674 	 * remainder. Note that the default value of 400ms will be tried
1675 	 * if you do not specify any command line parameter.
1676 	 */
1677 	speeds[0] = programmableDelay;
1678 
1679 	aiptek = kzalloc(sizeof(struct aiptek), GFP_KERNEL);
1680 	inputdev = input_allocate_device();
1681 	if (!aiptek || !inputdev) {
1682 		dev_warn(&intf->dev,
1683 			 "cannot allocate memory or input device\n");
1684 		goto fail1;
1685         }
1686 
1687 	aiptek->data = usb_alloc_coherent(usbdev, AIPTEK_PACKET_LENGTH,
1688 					  GFP_KERNEL, &aiptek->data_dma);
1689         if (!aiptek->data) {
1690 		dev_warn(&intf->dev, "cannot allocate usb buffer\n");
1691 		goto fail1;
1692 	}
1693 
1694 	aiptek->urb = usb_alloc_urb(0, GFP_KERNEL);
1695 	if (!aiptek->urb) {
1696 	        dev_warn(&intf->dev, "cannot allocate urb\n");
1697 		goto fail2;
1698 	}
1699 
1700 	aiptek->inputdev = inputdev;
1701 	aiptek->intf = intf;
1702 	aiptek->ifnum = intf->cur_altsetting->desc.bInterfaceNumber;
1703 	aiptek->inDelay = 0;
1704 	aiptek->endDelay = 0;
1705 	aiptek->previousJitterable = 0;
1706 	aiptek->lastMacro = -1;
1707 
1708 	/* Set up the curSettings struct. Said struct contains the current
1709 	 * programmable parameters. The newSetting struct contains changes
1710 	 * the user makes to the settings via the sysfs interface. Those
1711 	 * changes are not "committed" to curSettings until the user
1712 	 * writes to the sysfs/.../execute file.
1713 	 */
1714 	aiptek->curSetting.pointerMode = AIPTEK_POINTER_EITHER_MODE;
1715 	aiptek->curSetting.coordinateMode = AIPTEK_COORDINATE_ABSOLUTE_MODE;
1716 	aiptek->curSetting.toolMode = AIPTEK_TOOL_BUTTON_PEN_MODE;
1717 	aiptek->curSetting.xTilt = AIPTEK_TILT_DISABLE;
1718 	aiptek->curSetting.yTilt = AIPTEK_TILT_DISABLE;
1719 	aiptek->curSetting.mouseButtonLeft = AIPTEK_MOUSE_LEFT_BUTTON;
1720 	aiptek->curSetting.mouseButtonMiddle = AIPTEK_MOUSE_MIDDLE_BUTTON;
1721 	aiptek->curSetting.mouseButtonRight = AIPTEK_MOUSE_RIGHT_BUTTON;
1722 	aiptek->curSetting.stylusButtonUpper = AIPTEK_STYLUS_UPPER_BUTTON;
1723 	aiptek->curSetting.stylusButtonLower = AIPTEK_STYLUS_LOWER_BUTTON;
1724 	aiptek->curSetting.jitterDelay = jitterDelay;
1725 	aiptek->curSetting.programmableDelay = programmableDelay;
1726 
1727 	/* Both structs should have equivalent settings
1728 	 */
1729 	aiptek->newSetting = aiptek->curSetting;
1730 
1731 	/* Determine the usb devices' physical path.
1732 	 * Asketh not why we always pretend we're using "../input0",
1733 	 * but I suspect this will have to be refactored one
1734 	 * day if a single USB device can be a keyboard & a mouse
1735 	 * & a tablet, and the inputX number actually will tell
1736 	 * us something...
1737 	 */
1738 	usb_make_path(usbdev, aiptek->features.usbPath,
1739 			sizeof(aiptek->features.usbPath));
1740 	strlcat(aiptek->features.usbPath, "/input0",
1741 		sizeof(aiptek->features.usbPath));
1742 
1743 	/* Set up client data, pointers to open and close routines
1744 	 * for the input device.
1745 	 */
1746 	inputdev->name = "Aiptek";
1747 	inputdev->phys = aiptek->features.usbPath;
1748 	usb_to_input_id(usbdev, &inputdev->id);
1749 	inputdev->dev.parent = &intf->dev;
1750 
1751 	input_set_drvdata(inputdev, aiptek);
1752 
1753 	inputdev->open = aiptek_open;
1754 	inputdev->close = aiptek_close;
1755 
1756 	/* Now program the capacities of the tablet, in terms of being
1757 	 * an input device.
1758 	 */
1759 	for (i = 0; i < ARRAY_SIZE(eventTypes); ++i)
1760 	        __set_bit(eventTypes[i], inputdev->evbit);
1761 
1762 	for (i = 0; i < ARRAY_SIZE(absEvents); ++i)
1763 	        __set_bit(absEvents[i], inputdev->absbit);
1764 
1765 	for (i = 0; i < ARRAY_SIZE(relEvents); ++i)
1766 	        __set_bit(relEvents[i], inputdev->relbit);
1767 
1768 	__set_bit(MSC_SERIAL, inputdev->mscbit);
1769 
1770 	/* Set up key and button codes */
1771 	for (i = 0; i < ARRAY_SIZE(buttonEvents); ++i)
1772 		__set_bit(buttonEvents[i], inputdev->keybit);
1773 
1774 	for (i = 0; i < ARRAY_SIZE(macroKeyEvents); ++i)
1775 		__set_bit(macroKeyEvents[i], inputdev->keybit);
1776 
1777 	/*
1778 	 * Program the input device coordinate capacities. We do not yet
1779 	 * know what maximum X, Y, and Z values are, so we're putting fake
1780 	 * values in. Later, we'll ask the tablet to put in the correct
1781 	 * values.
1782 	 */
1783 	input_set_abs_params(inputdev, ABS_X, 0, 2999, 0, 0);
1784 	input_set_abs_params(inputdev, ABS_Y, 0, 2249, 0, 0);
1785 	input_set_abs_params(inputdev, ABS_PRESSURE, 0, 511, 0, 0);
1786 	input_set_abs_params(inputdev, ABS_TILT_X, AIPTEK_TILT_MIN, AIPTEK_TILT_MAX, 0, 0);
1787 	input_set_abs_params(inputdev, ABS_TILT_Y, AIPTEK_TILT_MIN, AIPTEK_TILT_MAX, 0, 0);
1788 	input_set_abs_params(inputdev, ABS_WHEEL, AIPTEK_WHEEL_MIN, AIPTEK_WHEEL_MAX - 1, 0, 0);
1789 
1790 	/* Verify that a device really has an endpoint */
1791 	if (intf->cur_altsetting->desc.bNumEndpoints < 1) {
1792 		dev_err(&intf->dev,
1793 			"interface has %d endpoints, but must have minimum 1\n",
1794 			intf->cur_altsetting->desc.bNumEndpoints);
1795 		err = -EINVAL;
1796 		goto fail3;
1797 	}
1798 	endpoint = &intf->cur_altsetting->endpoint[0].desc;
1799 
1800 	/* Go set up our URB, which is called when the tablet receives
1801 	 * input.
1802 	 */
1803 	usb_fill_int_urb(aiptek->urb,
1804 			 usbdev,
1805 			 usb_rcvintpipe(usbdev,
1806 					endpoint->bEndpointAddress),
1807 			 aiptek->data, 8, aiptek_irq, aiptek,
1808 			 endpoint->bInterval);
1809 
1810 	aiptek->urb->transfer_dma = aiptek->data_dma;
1811 	aiptek->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1812 
1813 	/* Program the tablet. This sets the tablet up in the mode
1814 	 * specified in newSetting, and also queries the tablet's
1815 	 * physical capacities.
1816 	 *
1817 	 * Sanity check: if a tablet doesn't like the slow programmatic
1818 	 * delay, we often get sizes of 0x0. Let's use that as an indicator
1819 	 * to try faster delays, up to 25 ms. If that logic fails, well, you'll
1820 	 * have to explain to us how your tablet thinks it's 0x0, and yet that's
1821 	 * not an error :-)
1822 	 */
1823 
1824 	for (i = 0; i < ARRAY_SIZE(speeds); ++i) {
1825 		aiptek->curSetting.programmableDelay = speeds[i];
1826 		(void)aiptek_program_tablet(aiptek);
1827 		if (input_abs_get_max(aiptek->inputdev, ABS_X) > 0) {
1828 			dev_info(&intf->dev,
1829 				 "Aiptek using %d ms programming speed\n",
1830 				 aiptek->curSetting.programmableDelay);
1831 			break;
1832 		}
1833 	}
1834 
1835 	/* Murphy says that some day someone will have a tablet that fails the
1836 	   above test. That's you, Frederic Rodrigo */
1837 	if (i == ARRAY_SIZE(speeds)) {
1838 		dev_info(&intf->dev,
1839 			 "Aiptek tried all speeds, no sane response\n");
1840 		err = -EINVAL;
1841 		goto fail3;
1842 	}
1843 
1844 	/* Associate this driver's struct with the usb interface.
1845 	 */
1846 	usb_set_intfdata(intf, aiptek);
1847 
1848 	/* Set up the sysfs files
1849 	 */
1850 	err = sysfs_create_group(&intf->dev.kobj, &aiptek_attribute_group);
1851 	if (err) {
1852 		dev_warn(&intf->dev, "cannot create sysfs group err: %d\n",
1853 			 err);
1854 		goto fail3;
1855         }
1856 
1857 	/* Register the tablet as an Input Device
1858 	 */
1859 	err = input_register_device(aiptek->inputdev);
1860 	if (err) {
1861 		dev_warn(&intf->dev,
1862 			 "input_register_device returned err: %d\n", err);
1863 		goto fail4;
1864         }
1865 	return 0;
1866 
1867  fail4:	sysfs_remove_group(&intf->dev.kobj, &aiptek_attribute_group);
1868  fail3: usb_free_urb(aiptek->urb);
1869  fail2:	usb_free_coherent(usbdev, AIPTEK_PACKET_LENGTH, aiptek->data,
1870 			  aiptek->data_dma);
1871  fail1: usb_set_intfdata(intf, NULL);
1872 	input_free_device(inputdev);
1873 	kfree(aiptek);
1874 	return err;
1875 }
1876 
1877 /***********************************************************************
1878  * Deal with tablet disconnecting from the system.
1879  */
1880 static void aiptek_disconnect(struct usb_interface *intf)
1881 {
1882 	struct aiptek *aiptek = usb_get_intfdata(intf);
1883 
1884 	/* Disassociate driver's struct with usb interface
1885 	 */
1886 	usb_set_intfdata(intf, NULL);
1887 	if (aiptek != NULL) {
1888 		/* Free & unhook everything from the system.
1889 		 */
1890 		usb_kill_urb(aiptek->urb);
1891 		input_unregister_device(aiptek->inputdev);
1892 		sysfs_remove_group(&intf->dev.kobj, &aiptek_attribute_group);
1893 		usb_free_urb(aiptek->urb);
1894 		usb_free_coherent(interface_to_usbdev(intf),
1895 				  AIPTEK_PACKET_LENGTH,
1896 				  aiptek->data, aiptek->data_dma);
1897 		kfree(aiptek);
1898 	}
1899 }
1900 
1901 static struct usb_driver aiptek_driver = {
1902 	.name = "aiptek",
1903 	.probe = aiptek_probe,
1904 	.disconnect = aiptek_disconnect,
1905 	.id_table = aiptek_ids,
1906 };
1907 
1908 module_usb_driver(aiptek_driver);
1909 
1910 MODULE_AUTHOR("Bryan W. Headley/Chris Atenasio/Cedric Brun/Rene van Paassen");
1911 MODULE_DESCRIPTION("Aiptek HyperPen USB Tablet Driver");
1912 MODULE_LICENSE("GPL");
1913 
1914 module_param(programmableDelay, int, 0);
1915 MODULE_PARM_DESC(programmableDelay, "delay used during tablet programming");
1916 module_param(jitterDelay, int, 0);
1917 MODULE_PARM_DESC(jitterDelay, "stylus/mouse settlement delay");
1918