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/drivers/input/tablet/aiptek.c

http://github.com/mirrors/linux
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   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
 262static int programmableDelay = AIPTEK_PROGRAMMABLE_DELAY_DEFAULT;
 263static int jitterDelay = AIPTEK_JITTER_DELAY_DEFAULT;
 264
 265struct 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
 272struct 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
 288struct 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
 308static const int eventTypes[] = {
 309        EV_KEY, EV_ABS, EV_REL, EV_MSC,
 310};
 311
 312static const int absEvents[] = {
 313        ABS_X, ABS_Y, ABS_PRESSURE, ABS_TILT_X, ABS_TILT_Y,
 314        ABS_WHEEL, ABS_MISC,
 315};
 316
 317static const int relEvents[] = {
 318        REL_X, REL_Y, REL_WHEEL,
 319};
 320
 321static 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 */
 333static 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
 348struct aiptek_map {
 349	const char *string;
 350	int value;
 351};
 352
 353static 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
 367static 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
 412static 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
 791exit:
 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 */
 808static 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
 820MODULE_DEVICE_TABLE(usb, aiptek_ids);
 821
 822/***********************************************************************
 823 * Open an instance of the tablet driver.
 824 */
 825static 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 */
 839static 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 */
 850static int
 851aiptek_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
 865static int
 866aiptek_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 */
 883static int
 884aiptek_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 */
 913static int
 914aiptek_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 */
 951static 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 */
1035static 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 snprintf(buf, PAGE_SIZE, "%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 */
1050static 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 */
1056static 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
1063static 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 snprintf(buf, PAGE_SIZE, "%s\n",
1068			map_val_to_str(pointer_mode_map,
1069					aiptek->curSetting.pointerMode));
1070}
1071
1072static ssize_t
1073store_tabletPointerMode(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1074{
1075	struct aiptek *aiptek = dev_get_drvdata(dev);
1076	int new_mode = map_str_to_val(pointer_mode_map, buf, count);
1077
1078	if (new_mode == AIPTEK_INVALID_VALUE)
1079		return -EINVAL;
1080
1081	aiptek->newSetting.pointerMode = new_mode;
1082	return count;
1083}
1084
1085static DEVICE_ATTR(pointer_mode,
1086		   S_IRUGO | S_IWUSR,
1087		   show_tabletPointerMode, store_tabletPointerMode);
1088
1089/***********************************************************************
1090 * support routines for the 'coordinate_mode' file. Note that this file
1091 * both displays current setting and allows reprogramming.
1092 */
1093
1094static struct aiptek_map coordinate_mode_map[] = {
1095	{ "absolute",	AIPTEK_COORDINATE_ABSOLUTE_MODE },
1096	{ "relative",	AIPTEK_COORDINATE_RELATIVE_MODE },
1097	{ NULL,		AIPTEK_INVALID_VALUE }
1098};
1099
1100static ssize_t show_tabletCoordinateMode(struct device *dev, struct device_attribute *attr, char *buf)
1101{
1102	struct aiptek *aiptek = dev_get_drvdata(dev);
1103
1104	return snprintf(buf, PAGE_SIZE, "%s\n",
1105			map_val_to_str(coordinate_mode_map,
1106					aiptek->curSetting.coordinateMode));
1107}
1108
1109static ssize_t
1110store_tabletCoordinateMode(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1111{
1112	struct aiptek *aiptek = dev_get_drvdata(dev);
1113	int new_mode = map_str_to_val(coordinate_mode_map, buf, count);
1114
1115	if (new_mode == AIPTEK_INVALID_VALUE)
1116		return -EINVAL;
1117
1118	aiptek->newSetting.coordinateMode = new_mode;
1119	return count;
1120}
1121
1122static DEVICE_ATTR(coordinate_mode,
1123		   S_IRUGO | S_IWUSR,
1124		   show_tabletCoordinateMode, store_tabletCoordinateMode);
1125
1126/***********************************************************************
1127 * support routines for the 'tool_mode' file. Note that this file
1128 * both displays current setting and allows reprogramming.
1129 */
1130
1131static struct aiptek_map tool_mode_map[] = {
1132	{ "mouse",	AIPTEK_TOOL_BUTTON_MOUSE_MODE },
1133	{ "eraser",	AIPTEK_TOOL_BUTTON_ERASER_MODE },
1134	{ "pencil",	AIPTEK_TOOL_BUTTON_PENCIL_MODE },
1135	{ "pen",	AIPTEK_TOOL_BUTTON_PEN_MODE },
1136	{ "brush",	AIPTEK_TOOL_BUTTON_BRUSH_MODE },
1137	{ "airbrush",	AIPTEK_TOOL_BUTTON_AIRBRUSH_MODE },
1138	{ "lens",	AIPTEK_TOOL_BUTTON_LENS_MODE },
1139	{ NULL,		AIPTEK_INVALID_VALUE }
1140};
1141
1142static ssize_t show_tabletToolMode(struct device *dev, struct device_attribute *attr, char *buf)
1143{
1144	struct aiptek *aiptek = dev_get_drvdata(dev);
1145
1146	return snprintf(buf, PAGE_SIZE, "%s\n",
1147			map_val_to_str(tool_mode_map,
1148					aiptek->curSetting.toolMode));
1149}
1150
1151static ssize_t
1152store_tabletToolMode(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1153{
1154	struct aiptek *aiptek = dev_get_drvdata(dev);
1155	int new_mode = map_str_to_val(tool_mode_map, buf, count);
1156
1157	if (new_mode == AIPTEK_INVALID_VALUE)
1158		return -EINVAL;
1159
1160	aiptek->newSetting.toolMode = new_mode;
1161	return count;
1162}
1163
1164static DEVICE_ATTR(tool_mode,
1165		   S_IRUGO | S_IWUSR,
1166		   show_tabletToolMode, store_tabletToolMode);
1167
1168/***********************************************************************
1169 * support routines for the 'xtilt' file. Note that this file
1170 * both displays current setting and allows reprogramming.
1171 */
1172static ssize_t show_tabletXtilt(struct device *dev, struct device_attribute *attr, char *buf)
1173{
1174	struct aiptek *aiptek = dev_get_drvdata(dev);
1175
1176	if (aiptek->curSetting.xTilt == AIPTEK_TILT_DISABLE) {
1177		return snprintf(buf, PAGE_SIZE, "disable\n");
1178	} else {
1179		return snprintf(buf, PAGE_SIZE, "%d\n",
1180				aiptek->curSetting.xTilt);
1181	}
1182}
1183
1184static ssize_t
1185store_tabletXtilt(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1186{
1187	struct aiptek *aiptek = dev_get_drvdata(dev);
1188	int x;
1189
1190	if (kstrtoint(buf, 10, &x)) {
1191		size_t len = buf[count - 1] == '\n' ? count - 1 : count;
1192
1193		if (strncmp(buf, "disable", len))
1194			return -EINVAL;
1195
1196		aiptek->newSetting.xTilt = AIPTEK_TILT_DISABLE;
1197	} else {
1198		if (x < AIPTEK_TILT_MIN || x > AIPTEK_TILT_MAX)
1199			return -EINVAL;
1200
1201		aiptek->newSetting.xTilt = x;
1202	}
1203
1204	return count;
1205}
1206
1207static DEVICE_ATTR(xtilt,
1208		   S_IRUGO | S_IWUSR, show_tabletXtilt, store_tabletXtilt);
1209
1210/***********************************************************************
1211 * support routines for the 'ytilt' file. Note that this file
1212 * both displays current setting and allows reprogramming.
1213 */
1214static ssize_t show_tabletYtilt(struct device *dev, struct device_attribute *attr, char *buf)
1215{
1216	struct aiptek *aiptek = dev_get_drvdata(dev);
1217
1218	if (aiptek->curSetting.yTilt == AIPTEK_TILT_DISABLE) {
1219		return snprintf(buf, PAGE_SIZE, "disable\n");
1220	} else {
1221		return snprintf(buf, PAGE_SIZE, "%d\n",
1222				aiptek->curSetting.yTilt);
1223	}
1224}
1225
1226static ssize_t
1227store_tabletYtilt(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1228{
1229	struct aiptek *aiptek = dev_get_drvdata(dev);
1230	int y;
1231
1232	if (kstrtoint(buf, 10, &y)) {
1233		size_t len = buf[count - 1] == '\n' ? count - 1 : count;
1234
1235		if (strncmp(buf, "disable", len))
1236			return -EINVAL;
1237
1238		aiptek->newSetting.yTilt = AIPTEK_TILT_DISABLE;
1239	} else {
1240		if (y < AIPTEK_TILT_MIN || y > AIPTEK_TILT_MAX)
1241			return -EINVAL;
1242
1243		aiptek->newSetting.yTilt = y;
1244	}
1245
1246	return count;
1247}
1248
1249static DEVICE_ATTR(ytilt,
1250		   S_IRUGO | S_IWUSR, show_tabletYtilt, store_tabletYtilt);
1251
1252/***********************************************************************
1253 * support routines for the 'jitter' file. Note that this file
1254 * both displays current setting and allows reprogramming.
1255 */
1256static ssize_t show_tabletJitterDelay(struct device *dev, struct device_attribute *attr, char *buf)
1257{
1258	struct aiptek *aiptek = dev_get_drvdata(dev);
1259
1260	return snprintf(buf, PAGE_SIZE, "%d\n", aiptek->curSetting.jitterDelay);
1261}
1262
1263static ssize_t
1264store_tabletJitterDelay(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1265{
1266	struct aiptek *aiptek = dev_get_drvdata(dev);
1267	int err, j;
1268
1269	err = kstrtoint(buf, 10, &j);
1270	if (err)
1271		return err;
1272
1273	aiptek->newSetting.jitterDelay = j;
1274	return count;
1275}
1276
1277static DEVICE_ATTR(jitter,
1278		   S_IRUGO | S_IWUSR,
1279		   show_tabletJitterDelay, store_tabletJitterDelay);
1280
1281/***********************************************************************
1282 * support routines for the 'delay' file. Note that this file
1283 * both displays current setting and allows reprogramming.
1284 */
1285static ssize_t show_tabletProgrammableDelay(struct device *dev, struct device_attribute *attr, char *buf)
1286{
1287	struct aiptek *aiptek = dev_get_drvdata(dev);
1288
1289	return snprintf(buf, PAGE_SIZE, "%d\n",
1290			aiptek->curSetting.programmableDelay);
1291}
1292
1293static ssize_t
1294store_tabletProgrammableDelay(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1295{
1296	struct aiptek *aiptek = dev_get_drvdata(dev);
1297	int err, d;
1298
1299	err = kstrtoint(buf, 10, &d);
1300	if (err)
1301		return err;
1302
1303	aiptek->newSetting.programmableDelay = d;
1304	return count;
1305}
1306
1307static DEVICE_ATTR(delay,
1308		   S_IRUGO | S_IWUSR,
1309		   show_tabletProgrammableDelay, store_tabletProgrammableDelay);
1310
1311/***********************************************************************
1312 * support routines for the 'event_count' file. Note that this file
1313 * only displays current setting.
1314 */
1315static ssize_t show_tabletEventsReceived(struct device *dev, struct device_attribute *attr, char *buf)
1316{
1317	struct aiptek *aiptek = dev_get_drvdata(dev);
1318
1319	return snprintf(buf, PAGE_SIZE, "%ld\n", aiptek->eventCount);
1320}
1321
1322static DEVICE_ATTR(event_count, S_IRUGO, show_tabletEventsReceived, NULL);
1323
1324/***********************************************************************
1325 * support routines for the 'diagnostic' file. Note that this file
1326 * only displays current setting.
1327 */
1328static ssize_t show_tabletDiagnosticMessage(struct device *dev, struct device_attribute *attr, char *buf)
1329{
1330	struct aiptek *aiptek = dev_get_drvdata(dev);
1331	char *retMsg;
1332
1333	switch (aiptek->diagnostic) {
1334	case AIPTEK_DIAGNOSTIC_NA:
1335		retMsg = "no errors\n";
1336		break;
1337
1338	case AIPTEK_DIAGNOSTIC_SENDING_RELATIVE_IN_ABSOLUTE:
1339		retMsg = "Error: receiving relative reports\n";
1340		break;
1341
1342	case AIPTEK_DIAGNOSTIC_SENDING_ABSOLUTE_IN_RELATIVE:
1343		retMsg = "Error: receiving absolute reports\n";
1344		break;
1345
1346	case AIPTEK_DIAGNOSTIC_TOOL_DISALLOWED:
1347		if (aiptek->curSetting.pointerMode ==
1348		    AIPTEK_POINTER_ONLY_MOUSE_MODE) {
1349			retMsg = "Error: receiving stylus reports\n";
1350		} else {
1351			retMsg = "Error: receiving mouse reports\n";
1352		}
1353		break;
1354
1355	default:
1356		return 0;
1357	}
1358	return snprintf(buf, PAGE_SIZE, retMsg);
1359}
1360
1361static DEVICE_ATTR(diagnostic, S_IRUGO, show_tabletDiagnosticMessage, NULL);
1362
1363/***********************************************************************
1364 * support routines for the 'stylus_upper' file. Note that this file
1365 * both displays current setting and allows for setting changing.
1366 */
1367
1368static struct aiptek_map stylus_button_map[] = {
1369	{ "upper",	AIPTEK_STYLUS_UPPER_BUTTON },
1370	{ "lower",	AIPTEK_STYLUS_LOWER_BUTTON },
1371	{ NULL,		AIPTEK_INVALID_VALUE }
1372};
1373
1374static ssize_t show_tabletStylusUpper(struct device *dev, struct device_attribute *attr, char *buf)
1375{
1376	struct aiptek *aiptek = dev_get_drvdata(dev);
1377
1378	return snprintf(buf, PAGE_SIZE, "%s\n",
1379			map_val_to_str(stylus_button_map,
1380					aiptek->curSetting.stylusButtonUpper));
1381}
1382
1383static ssize_t
1384store_tabletStylusUpper(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1385{
1386	struct aiptek *aiptek = dev_get_drvdata(dev);
1387	int new_button = map_str_to_val(stylus_button_map, buf, count);
1388
1389	if (new_button == AIPTEK_INVALID_VALUE)
1390		return -EINVAL;
1391
1392	aiptek->newSetting.stylusButtonUpper = new_button;
1393	return count;
1394}
1395
1396static DEVICE_ATTR(stylus_upper,
1397		   S_IRUGO | S_IWUSR,
1398		   show_tabletStylusUpper, store_tabletStylusUpper);
1399
1400/***********************************************************************
1401 * support routines for the 'stylus_lower' file. Note that this file
1402 * both displays current setting and allows for setting changing.
1403 */
1404
1405static ssize_t show_tabletStylusLower(struct device *dev, struct device_attribute *attr, char *buf)
1406{
1407	struct aiptek *aiptek = dev_get_drvdata(dev);
1408
1409	return snprintf(buf, PAGE_SIZE, "%s\n",
1410			map_val_to_str(stylus_button_map,
1411					aiptek->curSetting.stylusButtonLower));
1412}
1413
1414static ssize_t
1415store_tabletStylusLower(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1416{
1417	struct aiptek *aiptek = dev_get_drvdata(dev);
1418	int new_button = map_str_to_val(stylus_button_map, buf, count);
1419
1420	if (new_button == AIPTEK_INVALID_VALUE)
1421		return -EINVAL;
1422
1423	aiptek->newSetting.stylusButtonLower = new_button;
1424	return count;
1425}
1426
1427static DEVICE_ATTR(stylus_lower,
1428		   S_IRUGO | S_IWUSR,
1429		   show_tabletStylusLower, store_tabletStylusLower);
1430
1431/***********************************************************************
1432 * support routines for the 'mouse_left' file. Note that this file
1433 * both displays current setting and allows for setting changing.
1434 */
1435
1436static struct aiptek_map mouse_button_map[] = {
1437	{ "left",	AIPTEK_MOUSE_LEFT_BUTTON },
1438	{ "middle",	AIPTEK_MOUSE_MIDDLE_BUTTON },
1439	{ "right",	AIPTEK_MOUSE_RIGHT_BUTTON },
1440	{ NULL,		AIPTEK_INVALID_VALUE }
1441};
1442
1443static ssize_t show_tabletMouseLeft(struct device *dev, struct device_attribute *attr, char *buf)
1444{
1445	struct aiptek *aiptek = dev_get_drvdata(dev);
1446
1447	return snprintf(buf, PAGE_SIZE, "%s\n",
1448			map_val_to_str(mouse_button_map,
1449					aiptek->curSetting.mouseButtonLeft));
1450}
1451
1452static ssize_t
1453store_tabletMouseLeft(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1454{
1455	struct aiptek *aiptek = dev_get_drvdata(dev);
1456	int new_button = map_str_to_val(mouse_button_map, buf, count);
1457
1458	if (new_button == AIPTEK_INVALID_VALUE)
1459		return -EINVAL;
1460
1461	aiptek->newSetting.mouseButtonLeft = new_button;
1462	return count;
1463}
1464
1465static DEVICE_ATTR(mouse_left,
1466		   S_IRUGO | S_IWUSR,
1467		   show_tabletMouseLeft, store_tabletMouseLeft);
1468
1469/***********************************************************************
1470 * support routines for the 'mouse_middle' file. Note that this file
1471 * both displays current setting and allows for setting changing.
1472 */
1473static ssize_t show_tabletMouseMiddle(struct device *dev, struct device_attribute *attr, char *buf)
1474{
1475	struct aiptek *aiptek = dev_get_drvdata(dev);
1476
1477	return snprintf(buf, PAGE_SIZE, "%s\n",
1478			map_val_to_str(mouse_button_map,
1479					aiptek->curSetting.mouseButtonMiddle));
1480}
1481
1482static ssize_t
1483store_tabletMouseMiddle(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1484{
1485	struct aiptek *aiptek = dev_get_drvdata(dev);
1486	int new_button = map_str_to_val(mouse_button_map, buf, count);
1487
1488	if (new_button == AIPTEK_INVALID_VALUE)
1489		return -EINVAL;
1490
1491	aiptek->newSetting.mouseButtonMiddle = new_button;
1492	return count;
1493}
1494
1495static DEVICE_ATTR(mouse_middle,
1496		   S_IRUGO | S_IWUSR,
1497		   show_tabletMouseMiddle, store_tabletMouseMiddle);
1498
1499/***********************************************************************
1500 * support routines for the 'mouse_right' file. Note that this file
1501 * both displays current setting and allows for setting changing.
1502 */
1503static ssize_t show_tabletMouseRight(struct device *dev, struct device_attribute *attr, char *buf)
1504{
1505	struct aiptek *aiptek = dev_get_drvdata(dev);
1506
1507	return snprintf(buf, PAGE_SIZE, "%s\n",
1508			map_val_to_str(mouse_button_map,
1509					aiptek->curSetting.mouseButtonRight));
1510}
1511
1512static ssize_t
1513store_tabletMouseRight(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1514{
1515	struct aiptek *aiptek = dev_get_drvdata(dev);
1516	int new_button = map_str_to_val(mouse_button_map, buf, count);
1517
1518	if (new_button == AIPTEK_INVALID_VALUE)
1519		return -EINVAL;
1520
1521	aiptek->newSetting.mouseButtonRight = new_button;
1522	return count;
1523}
1524
1525static DEVICE_ATTR(mouse_right,
1526		   S_IRUGO | S_IWUSR,
1527		   show_tabletMouseRight, store_tabletMous

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