drivers/input/touchscreen/usbtouchscreen.c

   1 /******************************************************************************
   2  * usbtouchscreen.c
   3  * Driver for USB Touchscreens, supporting those devices:
   4  *  - eGalax Touchkit
   5  *    includes eTurboTouch CT-410/510/700
   6  *  - 3M/Microtouch  EX II series
   7  *  - ITM
   8  *  - PanJit TouchSet
   9  *  - eTurboTouch
  10  *  - Gunze AHL61
  11  *  - DMC TSC-10/25
  12  *  - IRTOUCHSYSTEMS/UNITOP
  13  *  - IdealTEK URTC1000
  14  *  - General Touch
  15  *  - GoTop Super_Q2/GogoPen/PenPower tablets
  16  *  - JASTEC USB touch controller/DigiTech DTR-02U
  17  *  - Zytronic capacitive touchscreen
  18  *  - NEXIO/iNexio
  19  *  - Elo TouchSystems 2700 IntelliTouch
  20  *  - EasyTouch USB Dual/Multi touch controller from Data Modul
  21  *
  22  * Copyright (C) 2004-2007 by Daniel Ritz <daniel.ritz@gmx.ch>
  23  * Copyright (C) by Todd E. Johnson (mtouchusb.c)
  24  *
  25  * This program is free software; you can redistribute it and/or
  26  * modify it under the terms of the GNU General Public License as
  27  * published by the Free Software Foundation; either version 2 of the
  28  * License, or (at your option) any later version.
  29  *
  30  * This program is distributed in the hope that it will be useful, but
  31  * WITHOUT ANY WARRANTY; without even the implied warranty of
  32  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  33  * General Public License for more details.
  34  *
  35  * You should have received a copy of the GNU General Public License
  36  * along with this program; if not, write to the Free Software
  37  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  38  *
  39  * Driver is based on touchkitusb.c
  40  * - ITM parts are from itmtouch.c
  41  * - 3M parts are from mtouchusb.c
  42  * - PanJit parts are from an unmerged driver by Lanslott Gish
  43  * - DMC TSC 10/25 are from Holger Schurig, with ideas from an unmerged
  44  *   driver from Marius Vollmer
  45  *
  46  *****************************************************************************/
  47
  48 //#define DEBUG
  49
  50 #include <linux/kernel.h>
  51 #include <linux/slab.h>
  52 #include <linux/input.h>
  53 #include <linux/module.h>
  54 #include <linux/init.h>
  55 #include <linux/usb.h>
  56 #include <linux/usb/input.h>
  57 #include <linux/hid.h>
  58
  59
  60 #define DRIVER_VERSION          "v0.6"
  61 #define DRIVER_AUTHOR           "Daniel Ritz <daniel.ritz@gmx.ch>"
  62 #define DRIVER_DESC             "USB Touchscreen Driver"
  63
  64 static bool swap_xy;
  65 module_param(swap_xy, bool, 0644);
  66 MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");
  67
  68 static bool hwcalib_xy;
  69 module_param(hwcalib_xy, bool, 0644);
  70 MODULE_PARM_DESC(hwcalib_xy, "If set hw-calibrated X/Y are used if available");
  71
  72 /* device specifc data/functions */
  73 struct usbtouch_usb;
  74 struct usbtouch_device_info {
  75         int min_xc, max_xc;
  76         int min_yc, max_yc;
  77         int min_press, max_press;
  78         int rept_size;
  79
  80         /*
  81          * Always service the USB devices irq not just when the input device is
  82          * open. This is useful when devices have a watchdog which prevents us
  83          * from periodically polling the device. Leave this unset unless your
  84          * touchscreen device requires it, as it does consume more of the USB
  85          * bandwidth.
  86          */
  87         bool irq_always;
  88
  89         void (*process_pkt) (struct usbtouch_usb *usbtouch, unsigned char *pkt, int len);
  90
  91         /*
  92          * used to get the packet len. possible return values:
  93          * > 0: packet len
  94          * = 0: skip one byte
  95          * < 0: -return value more bytes needed
  96          */
  97         int  (*get_pkt_len) (unsigned char *pkt, int len);
  98
  99         int  (*read_data)   (struct usbtouch_usb *usbtouch, unsigned char *pkt);
 100         int  (*alloc)       (struct usbtouch_usb *usbtouch);
 101         int  (*init)        (struct usbtouch_usb *usbtouch);
 102         void (*exit)        (struct usbtouch_usb *usbtouch);
 103 };
 104
 105 /* a usbtouch device */
 106 struct usbtouch_usb {
 107         unsigned char *data;
 108         dma_addr_t data_dma;
 109         unsigned char *buffer;
 110         int buf_len;
 111         struct urb *irq;
 112         struct usb_interface *interface;
 113         struct input_dev *input;
 114         struct usbtouch_device_info *type;
 115         char name[128];
 116         char phys[64];
 117         void *priv;
 118
 119         int x, y;
 120         int touch, press;
 121 };
 122
 123
 124 /* device types */
 125 enum {
 126         DEVTYPE_IGNORE = -1,
 127         DEVTYPE_EGALAX,
 128         DEVTYPE_PANJIT,
 129         DEVTYPE_3M,
 130         DEVTYPE_ITM,
 131         DEVTYPE_ETURBO,
 132         DEVTYPE_GUNZE,
 133         DEVTYPE_DMC_TSC10,
 134         DEVTYPE_IRTOUCH,
 135         DEVTYPE_IDEALTEK,
 136         DEVTYPE_GENERAL_TOUCH,
 137         DEVTYPE_GOTOP,
 138         DEVTYPE_JASTEC,
 139         DEVTYPE_E2I,
 140         DEVTYPE_ZYTRONIC,
 141         DEVTYPE_TC45USB,
 142         DEVTYPE_NEXIO,
 143         DEVTYPE_ELO,
 144         DEVTYPE_ETOUCH,
 145 };
 146
 147 #define USB_DEVICE_HID_CLASS(vend, prod) \
 148         .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS \
 149                 | USB_DEVICE_ID_MATCH_INT_PROTOCOL \
 150                 | USB_DEVICE_ID_MATCH_DEVICE, \
 151         .idVendor = (vend), \
 152         .idProduct = (prod), \
 153         .bInterfaceClass = USB_INTERFACE_CLASS_HID, \
 154         .bInterfaceProtocol = USB_INTERFACE_PROTOCOL_MOUSE
 155
 156 static const struct usb_device_id usbtouch_devices[] = {
 157 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
 158         /* ignore the HID capable devices, handled by usbhid */
 159         {USB_DEVICE_HID_CLASS(0x0eef, 0x0001), .driver_info = DEVTYPE_IGNORE},
 160         {USB_DEVICE_HID_CLASS(0x0eef, 0x0002), .driver_info = DEVTYPE_IGNORE},
 161
 162         /* normal device IDs */
 163         {USB_DEVICE(0x3823, 0x0001), .driver_info = DEVTYPE_EGALAX},
 164         {USB_DEVICE(0x3823, 0x0002), .driver_info = DEVTYPE_EGALAX},
 165         {USB_DEVICE(0x0123, 0x0001), .driver_info = DEVTYPE_EGALAX},
 166         {USB_DEVICE(0x0eef, 0x0001), .driver_info = DEVTYPE_EGALAX},
 167         {USB_DEVICE(0x0eef, 0x0002), .driver_info = DEVTYPE_EGALAX},
 168         {USB_DEVICE(0x1234, 0x0001), .driver_info = DEVTYPE_EGALAX},
 169         {USB_DEVICE(0x1234, 0x0002), .driver_info = DEVTYPE_EGALAX},
 170 #endif
 171
 172 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
 173         {USB_DEVICE(0x134c, 0x0001), .driver_info = DEVTYPE_PANJIT},
 174         {USB_DEVICE(0x134c, 0x0002), .driver_info = DEVTYPE_PANJIT},
 175         {USB_DEVICE(0x134c, 0x0003), .driver_info = DEVTYPE_PANJIT},
 176         {USB_DEVICE(0x134c, 0x0004), .driver_info = DEVTYPE_PANJIT},
 177 #endif
 178
 179 #ifdef CONFIG_TOUCHSCREEN_USB_3M
 180         {USB_DEVICE(0x0596, 0x0001), .driver_info = DEVTYPE_3M},
 181 #endif
 182
 183 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
 184         {USB_DEVICE(0x0403, 0xf9e9), .driver_info = DEVTYPE_ITM},
 185         {USB_DEVICE(0x16e3, 0xf9e9), .driver_info = DEVTYPE_ITM},
 186 #endif
 187
 188 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
 189         {USB_DEVICE(0x1234, 0x5678), .driver_info = DEVTYPE_ETURBO},
 190 #endif
 191
 192 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
 193         {USB_DEVICE(0x0637, 0x0001), .driver_info = DEVTYPE_GUNZE},
 194 #endif
 195
 196 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
 197         {USB_DEVICE(0x0afa, 0x03e8), .driver_info = DEVTYPE_DMC_TSC10},
 198 #endif
 199
 200 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
 201         {USB_DEVICE(0x595a, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
 202         {USB_DEVICE(0x6615, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
 203 #endif
 204
 205 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
 206         {USB_DEVICE(0x1391, 0x1000), .driver_info = DEVTYPE_IDEALTEK},
 207 #endif
 208
 209 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
 210         {USB_DEVICE(0x0dfc, 0x0001), .driver_info = DEVTYPE_GENERAL_TOUCH},
 211 #endif
 212
 213 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
 214         {USB_DEVICE(0x08f2, 0x007f), .driver_info = DEVTYPE_GOTOP},
 215         {USB_DEVICE(0x08f2, 0x00ce), .driver_info = DEVTYPE_GOTOP},
 216         {USB_DEVICE(0x08f2, 0x00f4), .driver_info = DEVTYPE_GOTOP},
 217 #endif
 218
 219 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
 220         {USB_DEVICE(0x0f92, 0x0001), .driver_info = DEVTYPE_JASTEC},
 221 #endif
 222
 223 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
 224         {USB_DEVICE(0x1ac7, 0x0001), .driver_info = DEVTYPE_E2I},
 225 #endif
 226
 227 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
 228         {USB_DEVICE(0x14c8, 0x0003), .driver_info = DEVTYPE_ZYTRONIC},
 229 #endif
 230
 231 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
 232         /* TC5UH */
 233         {USB_DEVICE(0x0664, 0x0309), .driver_info = DEVTYPE_TC45USB},
 234         /* TC4UM */
 235         {USB_DEVICE(0x0664, 0x0306), .driver_info = DEVTYPE_TC45USB},
 236 #endif
 237
 238 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
 239         /* data interface only */
 240         {USB_DEVICE_AND_INTERFACE_INFO(0x10f0, 0x2002, 0x0a, 0x00, 0x00),
 241                 .driver_info = DEVTYPE_NEXIO},
 242         {USB_DEVICE_AND_INTERFACE_INFO(0x1870, 0x0001, 0x0a, 0x00, 0x00),
 243                 .driver_info = DEVTYPE_NEXIO},
 244 #endif
 245
 246 #ifdef CONFIG_TOUCHSCREEN_USB_ELO
 247         {USB_DEVICE(0x04e7, 0x0020), .driver_info = DEVTYPE_ELO},
 248 #endif
 249
 250 #ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
 251         {USB_DEVICE(0x7374, 0x0001), .driver_info = DEVTYPE_ETOUCH},
 252 #endif
 253
 254         {}
 255 };
 256
 257
 258 /*****************************************************************************
 259  * e2i Part
 260  */
 261
 262 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
 263 static int e2i_init(struct usbtouch_usb *usbtouch)
 264 {
 265         int ret;
 266         struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
 267
 268         ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
 269                               0x01, 0x02, 0x0000, 0x0081,
 270                               NULL, 0, USB_CTRL_SET_TIMEOUT);
 271
 272         dbg("%s - usb_control_msg - E2I_RESET - bytes|err: %d",
 273             __func__, ret);
 274         return ret;
 275 }
 276
 277 static int e2i_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 278 {
 279         int tmp = (pkt[0] << 8) | pkt[1];
 280         dev->x  = (pkt[2] << 8) | pkt[3];
 281         dev->y  = (pkt[4] << 8) | pkt[5];
 282
 283         tmp = tmp - 0xA000;
 284         dev->touch = (tmp > 0);
 285         dev->press = (tmp > 0 ? tmp : 0);
 286
 287         return 1;
 288 }
 289 #endif
 290
 291
 292 /*****************************************************************************
 293  * eGalax part
 294  */
 295
 296 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
 297
 298 #ifndef MULTI_PACKET
 299 #define MULTI_PACKET
 300 #endif
 301
 302 #define EGALAX_PKT_TYPE_MASK            0xFE
 303 #define EGALAX_PKT_TYPE_REPT            0x80
 304 #define EGALAX_PKT_TYPE_DIAG            0x0A
 305
 306 static int egalax_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 307 {
 308         if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT)
 309                 return 0;
 310
 311         dev->x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F);
 312         dev->y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F);
 313         dev->touch = pkt[0] & 0x01;
 314
 315         return 1;
 316 }
 317
 318 static int egalax_get_pkt_len(unsigned char *buf, int len)
 319 {
 320         switch (buf[0] & EGALAX_PKT_TYPE_MASK) {
 321         case EGALAX_PKT_TYPE_REPT:
 322                 return 5;
 323
 324         case EGALAX_PKT_TYPE_DIAG:
 325                 if (len < 2)
 326                         return -1;
 327
 328                 return buf[1] + 2;
 329         }
 330
 331         return 0;
 332 }
 333 #endif
 334
 335 /*****************************************************************************
 336  * EasyTouch part
 337  */
 338
 339 #ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
 340
 341 #ifndef MULTI_PACKET
 342 #define MULTI_PACKET
 343 #endif
 344
 345 #define ETOUCH_PKT_TYPE_MASK            0xFE
 346 #define ETOUCH_PKT_TYPE_REPT            0x80
 347 #define ETOUCH_PKT_TYPE_REPT2           0xB0
 348 #define ETOUCH_PKT_TYPE_DIAG            0x0A
 349
 350 static int etouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 351 {
 352         if ((pkt[0] & ETOUCH_PKT_TYPE_MASK) != ETOUCH_PKT_TYPE_REPT &&
 353                 (pkt[0] & ETOUCH_PKT_TYPE_MASK) != ETOUCH_PKT_TYPE_REPT2)
 354                 return 0;
 355
 356         dev->x = ((pkt[1] & 0x1F) << 7) | (pkt[2] & 0x7F);
 357         dev->y = ((pkt[3] & 0x1F) << 7) | (pkt[4] & 0x7F);
 358         dev->touch = pkt[0] & 0x01;
 359
 360         return 1;
 361 }
 362
 363 static int etouch_get_pkt_len(unsigned char *buf, int len)
 364 {
 365         switch (buf[0] & ETOUCH_PKT_TYPE_MASK) {
 366         case ETOUCH_PKT_TYPE_REPT:
 367         case ETOUCH_PKT_TYPE_REPT2:
 368                 return 5;
 369
 370         case ETOUCH_PKT_TYPE_DIAG:
 371                 if (len < 2)
 372                         return -1;
 373
 374                 return buf[1] + 2;
 375         }
 376
 377         return 0;
 378 }
 379 #endif
 380
 381 /*****************************************************************************
 382  * PanJit Part
 383  */
 384 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
 385 static int panjit_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 386 {
 387         dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
 388         dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
 389         dev->touch = pkt[0] & 0x01;
 390
 391         return 1;
 392 }
 393 #endif
 394
 395
 396 /*****************************************************************************
 397  * 3M/Microtouch Part
 398  */
 399 #ifdef CONFIG_TOUCHSCREEN_USB_3M
 400
 401 #define MTOUCHUSB_ASYNC_REPORT          1
 402 #define MTOUCHUSB_RESET                 7
 403 #define MTOUCHUSB_REQ_CTRLLR_ID         10
 404
 405 static int mtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 406 {
 407         if (hwcalib_xy) {
 408                 dev->x = (pkt[4] << 8) | pkt[3];
 409                 dev->y = 0xffff - ((pkt[6] << 8) | pkt[5]);
 410         } else {
 411                 dev->x = (pkt[8] << 8) | pkt[7];
 412                 dev->y = (pkt[10] << 8) | pkt[9];
 413         }
 414         dev->touch = (pkt[2] & 0x40) ? 1 : 0;
 415
 416         return 1;
 417 }
 418
 419 static int mtouch_init(struct usbtouch_usb *usbtouch)
 420 {
 421         int ret, i;
 422         struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
 423
 424         ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
 425                               MTOUCHUSB_RESET,
 426                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 427                               1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
 428         dbg("%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d",
 429             __func__, ret);
 430         if (ret < 0)
 431                 return ret;
 432         msleep(150);
 433
 434         for (i = 0; i < 3; i++) {
 435                 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
 436                                       MTOUCHUSB_ASYNC_REPORT,
 437                                       USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 438                                       1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT);
 439                 dbg("%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d",
 440                     __func__, ret);
 441                 if (ret >= 0)
 442                         break;
 443                 if (ret != -EPIPE)
 444                         return ret;
 445         }
 446
 447         /* Default min/max xy are the raw values, override if using hw-calib */
 448         if (hwcalib_xy) {
 449                 input_set_abs_params(usbtouch->input, ABS_X, 0, 0xffff, 0, 0);
 450                 input_set_abs_params(usbtouch->input, ABS_Y, 0, 0xffff, 0, 0);
 451         }
 452
 453         return 0;
 454 }
 455 #endif
 456
 457
 458 /*****************************************************************************
 459  * ITM Part
 460  */
 461 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
 462 static int itm_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 463 {
 464         int touch;
 465         /*
 466          * ITM devices report invalid x/y data if not touched.
 467          * if the screen was touched before but is not touched any more
 468          * report touch as 0 with the last valid x/y data once. then stop
 469          * reporting data until touched again.
 470          */
 471         dev->press = ((pkt[2] & 0x01) << 7) | (pkt[5] & 0x7F);
 472
 473         touch = ~pkt[7] & 0x20;
 474         if (!touch) {
 475                 if (dev->touch) {
 476                         dev->touch = 0;
 477                         return 1;
 478                 }
 479
 480                 return 0;
 481         }
 482
 483         dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F);
 484         dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F);
 485         dev->touch = touch;
 486
 487         return 1;
 488 }
 489 #endif
 490
 491
 492 /*****************************************************************************
 493  * eTurboTouch part
 494  */
 495 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
 496 #ifndef MULTI_PACKET
 497 #define MULTI_PACKET
 498 #endif
 499 static int eturbo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 500 {
 501         unsigned int shift;
 502
 503         /* packets should start with sync */
 504         if (!(pkt[0] & 0x80))
 505                 return 0;
 506
 507         shift = (6 - (pkt[0] & 0x03));
 508         dev->x = ((pkt[3] << 7) | pkt[4]) >> shift;
 509         dev->y = ((pkt[1] << 7) | pkt[2]) >> shift;
 510         dev->touch = (pkt[0] & 0x10) ? 1 : 0;
 511
 512         return 1;
 513 }
 514
 515 static int eturbo_get_pkt_len(unsigned char *buf, int len)
 516 {
 517         if (buf[0] & 0x80)
 518                 return 5;
 519         if (buf[0] == 0x01)
 520                 return 3;
 521         return 0;
 522 }
 523 #endif
 524
 525
 526 /*****************************************************************************
 527  * Gunze part
 528  */
 529 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
 530 static int gunze_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 531 {
 532         if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80))
 533                 return 0;
 534
 535         dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F);
 536         dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F);
 537         dev->touch = pkt[0] & 0x20;
 538
 539         return 1;
 540 }
 541 #endif
 542
 543 /*****************************************************************************
 544  * DMC TSC-10/25 Part
 545  *
 546  * Documentation about the controller and it's protocol can be found at
 547  *   http://www.dmccoltd.com/files/controler/tsc10usb_pi_e.pdf
 548  *   http://www.dmccoltd.com/files/controler/tsc25_usb_e.pdf
 549  */
 550 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
 551
 552 /* supported data rates. currently using 130 */
 553 #define TSC10_RATE_POINT        0x50
 554 #define TSC10_RATE_30           0x40
 555 #define TSC10_RATE_50           0x41
 556 #define TSC10_RATE_80           0x42
 557 #define TSC10_RATE_100          0x43
 558 #define TSC10_RATE_130          0x44
 559 #define TSC10_RATE_150          0x45
 560
 561 /* commands */
 562 #define TSC10_CMD_RESET         0x55
 563 #define TSC10_CMD_RATE          0x05
 564 #define TSC10_CMD_DATA1         0x01
 565
 566 static int dmc_tsc10_init(struct usbtouch_usb *usbtouch)
 567 {
 568         struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
 569         int ret = -ENOMEM;
 570         unsigned char *buf;
 571
 572         buf = kmalloc(2, GFP_NOIO);
 573         if (!buf)
 574                 goto err_nobuf;
 575         /* reset */
 576         buf[0] = buf[1] = 0xFF;
 577         ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
 578                               TSC10_CMD_RESET,
 579                               USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 580                               0, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
 581         if (ret < 0)
 582                 goto err_out;
 583         if (buf[0] != 0x06) {
 584                 ret = -ENODEV;
 585                 goto err_out;
 586         }
 587
 588         /* set coordinate output rate */
 589         buf[0] = buf[1] = 0xFF;
 590         ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
 591                               TSC10_CMD_RATE,
 592                               USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 593                               TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
 594         if (ret < 0)
 595                 goto err_out;
 596         if ((buf[0] != 0x06) && (buf[0] != 0x15 || buf[1] != 0x01)) {
 597                 ret = -ENODEV;
 598                 goto err_out;
 599         }
 600
 601         /* start sending data */
 602         ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
 603                               TSC10_CMD_DATA1,
 604                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 605                               0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
 606 err_out:
 607         kfree(buf);
 608 err_nobuf:
 609         return ret;
 610 }
 611
 612
 613 static int dmc_tsc10_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 614 {
 615         dev->x = ((pkt[2] & 0x03) << 8) | pkt[1];
 616         dev->y = ((pkt[4] & 0x03) << 8) | pkt[3];
 617         dev->touch = pkt[0] & 0x01;
 618
 619         return 1;
 620 }
 621 #endif
 622
 623
 624 /*****************************************************************************
 625  * IRTOUCH Part
 626  */
 627 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
 628 static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 629 {
 630         dev->x = (pkt[3] << 8) | pkt[2];
 631         dev->y = (pkt[5] << 8) | pkt[4];
 632         dev->touch = (pkt[1] & 0x03) ? 1 : 0;
 633
 634         return 1;
 635 }
 636 #endif
 637
 638 /*****************************************************************************
 639  * ET&T TC5UH/TC4UM part
 640  */
 641 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
 642 static int tc45usb_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 643 {
 644         dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
 645         dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
 646         dev->touch = pkt[0] & 0x01;
 647
 648         return 1;
 649 }
 650 #endif
 651
 652 /*****************************************************************************
 653  * IdealTEK URTC1000 Part
 654  */
 655 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
 656 #ifndef MULTI_PACKET
 657 #define MULTI_PACKET
 658 #endif
 659 static int idealtek_get_pkt_len(unsigned char *buf, int len)
 660 {
 661         if (buf[0] & 0x80)
 662                 return 5;
 663         if (buf[0] == 0x01)
 664                 return len;
 665         return 0;
 666 }
 667
 668 static int idealtek_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 669 {
 670         switch (pkt[0] & 0x98) {
 671         case 0x88:
 672                 /* touch data in IdealTEK mode */
 673                 dev->x = (pkt[1] << 5) | (pkt[2] >> 2);
 674                 dev->y = (pkt[3] << 5) | (pkt[4] >> 2);
 675                 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
 676                 return 1;
 677
 678         case 0x98:
 679                 /* touch data in MT emulation mode */
 680                 dev->x = (pkt[2] << 5) | (pkt[1] >> 2);
 681                 dev->y = (pkt[4] << 5) | (pkt[3] >> 2);
 682                 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
 683                 return 1;
 684
 685         default:
 686                 return 0;
 687         }
 688 }
 689 #endif
 690
 691 /*****************************************************************************
 692  * General Touch Part
 693  */
 694 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
 695 static int general_touch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 696 {
 697         dev->x = (pkt[2] << 8) | pkt[1];
 698         dev->y = (pkt[4] << 8) | pkt[3];
 699         dev->press = pkt[5] & 0xff;
 700         dev->touch = pkt[0] & 0x01;
 701
 702         return 1;
 703 }
 704 #endif
 705
 706 /*****************************************************************************
 707  * GoTop Part
 708  */
 709 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
 710 static int gotop_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 711 {
 712         dev->x = ((pkt[1] & 0x38) << 4) | pkt[2];
 713         dev->y = ((pkt[1] & 0x07) << 7) | pkt[3];
 714         dev->touch = pkt[0] & 0x01;
 715
 716         return 1;
 717 }
 718 #endif
 719
 720 /*****************************************************************************
 721  * JASTEC Part
 722  */
 723 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
 724 static int jastec_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 725 {
 726         dev->x = ((pkt[0] & 0x3f) << 6) | (pkt[2] & 0x3f);
 727         dev->y = ((pkt[1] & 0x3f) << 6) | (pkt[3] & 0x3f);
 728         dev->touch = (pkt[0] & 0x40) >> 6;
 729
 730         return 1;
 731 }
 732 #endif
 733
 734 /*****************************************************************************
 735  * Zytronic Part
 736  */
 737 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
 738 static int zytronic_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 739 {
 740         switch (pkt[0]) {
 741         case 0x3A: /* command response */
 742                 dbg("%s: Command response %d", __func__, pkt[1]);
 743                 break;
 744
 745         case 0xC0: /* down */
 746                 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
 747                 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
 748                 dev->touch = 1;
 749                 dbg("%s: down %d,%d", __func__, dev->x, dev->y);
 750                 return 1;
 751
 752         case 0x80: /* up */
 753                 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
 754                 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
 755                 dev->touch = 0;
 756                 dbg("%s: up %d,%d", __func__, dev->x, dev->y);
 757                 return 1;
 758
 759         default:
 760                 dbg("%s: Unknown return %d", __func__, pkt[0]);
 761                 break;
 762         }
 763
 764         return 0;
 765 }
 766 #endif
 767
 768 /*****************************************************************************
 769  * NEXIO Part
 770  */
 771 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
 772
 773 #define NEXIO_TIMEOUT   5000
 774 #define NEXIO_BUFSIZE   1024
 775 #define NEXIO_THRESHOLD 50
 776
 777 struct nexio_priv {
 778         struct urb *ack;
 779         unsigned char *ack_buf;
 780 };
 781
 782 struct nexio_touch_packet {
 783         u8      flags;          /* 0xe1 = touch, 0xe1 = release */
 784         __be16  data_len;       /* total bytes of touch data */
 785         __be16  x_len;          /* bytes for X axis */
 786         __be16  y_len;          /* bytes for Y axis */
 787         u8      data[];
 788 } __attribute__ ((packed));
 789
 790 static unsigned char nexio_ack_pkt[2] = { 0xaa, 0x02 };
 791 static unsigned char nexio_init_pkt[4] = { 0x82, 0x04, 0x0a, 0x0f };
 792
 793 static void nexio_ack_complete(struct urb *urb)
 794 {
 795 }
 796
 797 static int nexio_alloc(struct usbtouch_usb *usbtouch)
 798 {
 799         struct nexio_priv *priv;
 800         int ret = -ENOMEM;
 801
 802         usbtouch->priv = kmalloc(sizeof(struct nexio_priv), GFP_KERNEL);
 803         if (!usbtouch->priv)
 804                 goto out_buf;
 805
 806         priv = usbtouch->priv;
 807
 808         priv->ack_buf = kmemdup(nexio_ack_pkt, sizeof(nexio_ack_pkt),
 809                                 GFP_KERNEL);
 810         if (!priv->ack_buf)
 811                 goto err_priv;
 812
 813         priv->ack = usb_alloc_urb(0, GFP_KERNEL);
 814         if (!priv->ack) {
 815                 dbg("%s - usb_alloc_urb failed: usbtouch->ack", __func__);
 816                 goto err_ack_buf;
 817         }
 818
 819         return 0;
 820
 821 err_ack_buf:
 822         kfree(priv->ack_buf);
 823 err_priv:
 824         kfree(priv);
 825 out_buf:
 826         return ret;
 827 }
 828
 829 static int nexio_init(struct usbtouch_usb *usbtouch)
 830 {
 831         struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
 832         struct usb_host_interface *interface = usbtouch->interface->cur_altsetting;
 833         struct nexio_priv *priv = usbtouch->priv;
 834         int ret = -ENOMEM;
 835         int actual_len, i;
 836         unsigned char *buf;
 837         char *firmware_ver = NULL, *device_name = NULL;
 838         int input_ep = 0, output_ep = 0;
 839
 840         /* find first input and output endpoint */
 841         for (i = 0; i < interface->desc.bNumEndpoints; i++) {
 842                 if (!input_ep &&
 843                     usb_endpoint_dir_in(&interface->endpoint[i].desc))
 844                         input_ep = interface->endpoint[i].desc.bEndpointAddress;
 845                 if (!output_ep &&
 846                     usb_endpoint_dir_out(&interface->endpoint[i].desc))
 847                         output_ep = interface->endpoint[i].desc.bEndpointAddress;
 848         }
 849         if (!input_ep || !output_ep)
 850                 return -ENXIO;
 851
 852         buf = kmalloc(NEXIO_BUFSIZE, GFP_NOIO);
 853         if (!buf)
 854                 goto out_buf;
 855
 856         /* two empty reads */
 857         for (i = 0; i < 2; i++) {
 858                 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
 859                                    buf, NEXIO_BUFSIZE, &actual_len,
 860                                    NEXIO_TIMEOUT);
 861                 if (ret < 0)
 862                         goto out_buf;
 863         }
 864
 865         /* send init command */
 866         memcpy(buf, nexio_init_pkt, sizeof(nexio_init_pkt));
 867         ret = usb_bulk_msg(dev, usb_sndbulkpipe(dev, output_ep),
 868                            buf, sizeof(nexio_init_pkt), &actual_len,
 869                            NEXIO_TIMEOUT);
 870         if (ret < 0)
 871                 goto out_buf;
 872
 873         /* read replies */
 874         for (i = 0; i < 3; i++) {
 875                 memset(buf, 0, NEXIO_BUFSIZE);
 876                 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
 877                                    buf, NEXIO_BUFSIZE, &actual_len,
 878                                    NEXIO_TIMEOUT);
 879                 if (ret < 0 || actual_len < 1 || buf[1] != actual_len)
 880                         continue;
 881                 switch (buf[0]) {
 882                 case 0x83:      /* firmware version */
 883                         if (!firmware_ver)
 884                                 firmware_ver = kstrdup(&buf[2], GFP_NOIO);
 885                         break;
 886                 case 0x84:      /* device name */
 887                         if (!device_name)
 888                                 device_name = kstrdup(&buf[2], GFP_NOIO);
 889                         break;
 890                 }
 891         }
 892
 893         printk(KERN_INFO "Nexio device: %s, firmware version: %s\n",
 894                device_name, firmware_ver);
 895
 896         kfree(firmware_ver);
 897         kfree(device_name);
 898
 899         usb_fill_bulk_urb(priv->ack, dev, usb_sndbulkpipe(dev, output_ep),
 900                           priv->ack_buf, sizeof(nexio_ack_pkt),
 901                           nexio_ack_complete, usbtouch);
 902         ret = 0;
 903
 904 out_buf:
 905         kfree(buf);
 906         return ret;
 907 }
 908
 909 static void nexio_exit(struct usbtouch_usb *usbtouch)
 910 {
 911         struct nexio_priv *priv = usbtouch->priv;
 912
 913         usb_kill_urb(priv->ack);
 914         usb_free_urb(priv->ack);
 915         kfree(priv->ack_buf);
 916         kfree(priv);
 917 }
 918
 919 static int nexio_read_data(struct usbtouch_usb *usbtouch, unsigned char *pkt)
 920 {
 921         struct nexio_touch_packet *packet = (void *) pkt;
 922         struct nexio_priv *priv = usbtouch->priv;
 923         unsigned int data_len = be16_to_cpu(packet->data_len);
 924         unsigned int x_len = be16_to_cpu(packet->x_len);
 925         unsigned int y_len = be16_to_cpu(packet->y_len);
 926         int x, y, begin_x, begin_y, end_x, end_y, w, h, ret;
 927
 928         /* got touch data? */
 929         if ((pkt[0] & 0xe0) != 0xe0)
 930                 return 0;
 931
 932         if (data_len > 0xff)
 933                 data_len -= 0x100;
 934         if (x_len > 0xff)
 935                 x_len -= 0x80;
 936
 937         /* send ACK */
 938         ret = usb_submit_urb(priv->ack, GFP_ATOMIC);
 939
 940         if (!usbtouch->type->max_xc) {
 941                 usbtouch->type->max_xc = 2 * x_len;
 942                 input_set_abs_params(usbtouch->input, ABS_X,
 943                                      0, usbtouch->type->max_xc, 0, 0);
 944                 usbtouch->type->max_yc = 2 * y_len;
 945                 input_set_abs_params(usbtouch->input, ABS_Y,
 946                                      0, usbtouch->type->max_yc, 0, 0);
 947         }
 948         /*
 949          * The device reports state of IR sensors on X and Y axes.
 950          * Each byte represents "darkness" percentage (0-100) of one element.
 951          * 17" touchscreen reports only 64 x 52 bytes so the resolution is low.
 952          * This also means that there's a limited multi-touch capability but
 953          * it's disabled (and untested) here as there's no X driver for that.
 954          */
 955         begin_x = end_x = begin_y = end_y = -1;
 956         for (x = 0; x < x_len; x++) {
 957                 if (begin_x == -1 && packet->data[x] > NEXIO_THRESHOLD) {
 958                         begin_x = x;
 959                         continue;
 960                 }
 961                 if (end_x == -1 && begin_x != -1 && packet->data[x] < NEXIO_THRESHOLD) {
 962                         end_x = x - 1;
 963                         for (y = x_len; y < data_len; y++) {
 964                                 if (begin_y == -1 && packet->data[y] > NEXIO_THRESHOLD) {
 965                                         begin_y = y - x_len;
 966                                         continue;
 967                                 }
 968                                 if (end_y == -1 &&
 969                                     begin_y != -1 && packet->data[y] < NEXIO_THRESHOLD) {
 970                                         end_y = y - 1 - x_len;
 971                                         w = end_x - begin_x;
 972                                         h = end_y - begin_y;
 973 #if 0
 974                                         /* multi-touch */
 975                                         input_report_abs(usbtouch->input,
 976                                                     ABS_MT_TOUCH_MAJOR, max(w,h));
 977                                         input_report_abs(usbtouch->input,
 978                                                     ABS_MT_TOUCH_MINOR, min(x,h));
 979                                         input_report_abs(usbtouch->input,
 980                                                     ABS_MT_POSITION_X, 2*begin_x+w);
 981                                         input_report_abs(usbtouch->input,
 982                                                     ABS_MT_POSITION_Y, 2*begin_y+h);
 983                                         input_report_abs(usbtouch->input,
 984                                                     ABS_MT_ORIENTATION, w > h);
 985                                         input_mt_sync(usbtouch->input);
 986 #endif
 987                                         /* single touch */
 988                                         usbtouch->x = 2 * begin_x + w;
 989                                         usbtouch->y = 2 * begin_y + h;
 990                                         usbtouch->touch = packet->flags & 0x01;
 991                                         begin_y = end_y = -1;
 992                                         return 1;
 993                                 }
 994                         }
 995                         begin_x = end_x = -1;
 996                 }
 997
 998         }
 999         return 0;
1000 }
1001 #endif
1002
1003
1004 /*****************************************************************************
1005  * ELO part
1006  */
1007
1008 #ifdef CONFIG_TOUCHSCREEN_USB_ELO
1009
1010 static int elo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
1011 {
1012         dev->x = (pkt[3] << 8) | pkt[2];
1013         dev->y = (pkt[5] << 8) | pkt[4];
1014         dev->touch = pkt[6] > 0;
1015         dev->press = pkt[6];
1016
1017         return 1;
1018 }
1019 #endif
1020
1021
1022 /*****************************************************************************
1023  * the different device descriptors
1024  */
1025 #ifdef MULTI_PACKET
1026 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1027                                    unsigned char *pkt, int len);
1028 #endif
1029
1030 static struct usbtouch_device_info usbtouch_dev_info[] = {
1031 #ifdef CONFIG_TOUCHSCREEN_USB_ELO
1032         [DEVTYPE_ELO] = {
1033                 .min_xc         = 0x0,
1034                 .max_xc         = 0x0fff,
1035                 .min_yc         = 0x0,
1036                 .max_yc         = 0x0fff,
1037                 .max_press      = 0xff,
1038                 .rept_size      = 8,
1039                 .read_data      = elo_read_data,
1040         },
1041 #endif
1042
1043 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
1044         [DEVTYPE_EGALAX] = {
1045                 .min_xc         = 0x0,
1046                 .max_xc         = 0x07ff,
1047                 .min_yc         = 0x0,
1048                 .max_yc         = 0x07ff,
1049                 .rept_size      = 16,
1050                 .process_pkt    = usbtouch_process_multi,
1051                 .get_pkt_len    = egalax_get_pkt_len,
1052                 .read_data      = egalax_read_data,
1053         },
1054 #endif
1055
1056 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
1057         [DEVTYPE_PANJIT] = {
1058                 .min_xc         = 0x0,
1059                 .max_xc         = 0x0fff,
1060                 .min_yc         = 0x0,
1061                 .max_yc         = 0x0fff,
1062                 .rept_size      = 8,
1063                 .read_data      = panjit_read_data,
1064         },
1065 #endif
1066
1067 #ifdef CONFIG_TOUCHSCREEN_USB_3M
1068         [DEVTYPE_3M] = {
1069                 .min_xc         = 0x0,
1070                 .max_xc         = 0x4000,
1071                 .min_yc         = 0x0,
1072                 .max_yc         = 0x4000,
1073                 .rept_size      = 11,
1074                 .read_data      = mtouch_read_data,
1075                 .init           = mtouch_init,
1076         },
1077 #endif
1078
1079 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
1080         [DEVTYPE_ITM] = {
1081                 .min_xc         = 0x0,
1082                 .max_xc         = 0x0fff,
1083                 .min_yc         = 0x0,
1084                 .max_yc         = 0x0fff,
1085                 .max_press      = 0xff,
1086                 .rept_size      = 8,
1087                 .read_data      = itm_read_data,
1088         },
1089 #endif
1090
1091 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
1092         [DEVTYPE_ETURBO] = {
1093                 .min_xc         = 0x0,
1094                 .max_xc         = 0x07ff,
1095                 .min_yc         = 0x0,
1096                 .max_yc         = 0x07ff,
1097                 .rept_size      = 8,
1098                 .process_pkt    = usbtouch_process_multi,
1099                 .get_pkt_len    = eturbo_get_pkt_len,
1100                 .read_data      = eturbo_read_data,
1101         },
1102 #endif
1103
1104 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
1105         [DEVTYPE_GUNZE] = {
1106                 .min_xc         = 0x0,
1107                 .max_xc         = 0x0fff,
1108                 .min_yc         = 0x0,
1109                 .max_yc         = 0x0fff,
1110                 .rept_size      = 4,
1111                 .read_data      = gunze_read_data,
1112         },
1113 #endif
1114
1115 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
1116         [DEVTYPE_DMC_TSC10] = {
1117                 .min_xc         = 0x0,
1118                 .max_xc         = 0x03ff,
1119                 .min_yc         = 0x0,
1120                 .max_yc         = 0x03ff,
1121                 .rept_size      = 5,
1122                 .init           = dmc_tsc10_init,
1123                 .read_data      = dmc_tsc10_read_data,
1124         },
1125 #endif
1126
1127 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
1128         [DEVTYPE_IRTOUCH] = {
1129                 .min_xc         = 0x0,
1130                 .max_xc         = 0x0fff,
1131                 .min_yc         = 0x0,
1132                 .max_yc         = 0x0fff,
1133                 .rept_size      = 8,
1134                 .read_data      = irtouch_read_data,
1135         },
1136 #endif
1137
1138 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
1139         [DEVTYPE_IDEALTEK] = {
1140                 .min_xc         = 0x0,
1141                 .max_xc         = 0x0fff,
1142                 .min_yc         = 0x0,
1143                 .max_yc         = 0x0fff,
1144                 .rept_size      = 8,
1145                 .process_pkt    = usbtouch_process_multi,
1146                 .get_pkt_len    = idealtek_get_pkt_len,
1147                 .read_data      = idealtek_read_data,
1148         },
1149 #endif
1150
1151 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
1152         [DEVTYPE_GENERAL_TOUCH] = {
1153                 .min_xc         = 0x0,
1154                 .max_xc         = 0x7fff,
1155                 .min_yc         = 0x0,
1156                 .max_yc         = 0x7fff,
1157                 .rept_size      = 7,
1158                 .read_data      = general_touch_read_data,
1159         },
1160 #endif
1161
1162 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
1163         [DEVTYPE_GOTOP] = {
1164                 .min_xc         = 0x0,
1165                 .max_xc         = 0x03ff,
1166                 .min_yc         = 0x0,
1167                 .max_yc         = 0x03ff,
1168                 .rept_size      = 4,
1169                 .read_data      = gotop_read_data,
1170         },
1171 #endif
1172
1173 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
1174         [DEVTYPE_JASTEC] = {
1175                 .min_xc         = 0x0,
1176                 .max_xc         = 0x0fff,
1177                 .min_yc         = 0x0,
1178                 .max_yc         = 0x0fff,
1179                 .rept_size      = 4,
1180                 .read_data      = jastec_read_data,
1181         },
1182 #endif
1183
1184 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
1185         [DEVTYPE_E2I] = {
1186                 .min_xc         = 0x0,
1187                 .max_xc         = 0x7fff,
1188                 .min_yc         = 0x0,
1189                 .max_yc         = 0x7fff,
1190                 .rept_size      = 6,
1191                 .init           = e2i_init,
1192                 .read_data      = e2i_read_data,
1193         },
1194 #endif
1195
1196 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
1197         [DEVTYPE_ZYTRONIC] = {
1198                 .min_xc         = 0x0,
1199                 .max_xc         = 0x03ff,
1200                 .min_yc         = 0x0,
1201                 .max_yc         = 0x03ff,
1202                 .rept_size      = 5,
1203                 .read_data      = zytronic_read_data,
1204                 .irq_always     = true,
1205         },
1206 #endif
1207
1208 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
1209         [DEVTYPE_TC45USB] = {
1210                 .min_xc         = 0x0,
1211                 .max_xc         = 0x0fff,
1212                 .min_yc         = 0x0,
1213                 .max_yc         = 0x0fff,
1214                 .rept_size      = 5,
1215                 .read_data      = tc45usb_read_data,
1216         },
1217 #endif
1218
1219 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
1220         [DEVTYPE_NEXIO] = {
1221                 .rept_size      = 1024,
1222                 .irq_always     = true,
1223                 .read_data      = nexio_read_data,
1224                 .alloc          = nexio_alloc,
1225                 .init           = nexio_init,
1226                 .exit           = nexio_exit,
1227         },
1228 #endif
1229 #ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
1230         [DEVTYPE_ETOUCH] = {
1231                 .min_xc         = 0x0,
1232                 .max_xc         = 0x07ff,
1233                 .min_yc         = 0x0,
1234                 .max_yc         = 0x07ff,
1235                 .rept_size      = 16,
1236                 .process_pkt    = usbtouch_process_multi,
1237                 .get_pkt_len    = etouch_get_pkt_len,
1238                 .read_data      = etouch_read_data,
1239         },
1240 #endif
1241 };
1242
1243
1244 /*****************************************************************************
1245  * Generic Part
1246  */
1247 static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
1248                                  unsigned char *pkt, int len)
1249 {
1250         struct usbtouch_device_info *type = usbtouch->type;
1251
1252         if (!type->read_data(usbtouch, pkt))
1253                         return;
1254
1255         input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch);
1256
1257         if (swap_xy) {
1258                 input_report_abs(usbtouch->input, ABS_X, usbtouch->y);
1259                 input_report_abs(usbtouch->input, ABS_Y, usbtouch->x);
1260         } else {
1261                 input_report_abs(usbtouch->input, ABS_X, usbtouch->x);
1262                 input_report_abs(usbtouch->input, ABS_Y, usbtouch->y);
1263         }
1264         if (type->max_press)
1265                 input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press);
1266         input_sync(usbtouch->input);
1267 }
1268
1269
1270 #ifdef MULTI_PACKET
1271 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1272                                    unsigned char *pkt, int len)
1273 {
1274         unsigned char *buffer;
1275         int pkt_len, pos, buf_len, tmp;
1276
1277         /* process buffer */
1278         if (unlikely(usbtouch->buf_len)) {
1279                 /* try to get size */
1280                 pkt_len = usbtouch->type->get_pkt_len(
1281                                 usbtouch->buffer, usbtouch->buf_len);
1282
1283                 /* drop? */
1284                 if (unlikely(!pkt_len))
1285                         goto out_flush_buf;
1286
1287                 /* need to append -pkt_len bytes before able to get size */
1288                 if (unlikely(pkt_len < 0)) {
1289                         int append = -pkt_len;
1290                         if (unlikely(append > len))
1291                                append = len;
1292                         if (usbtouch->buf_len + append >= usbtouch->type->rept_size)
1293                                 goto out_flush_buf;
1294                         memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append);
1295                         usbtouch->buf_len += append;
1296
1297                         pkt_len = usbtouch->type->get_pkt_len(
1298                                         usbtouch->buffer, usbtouch->buf_len);
1299                         if (pkt_len < 0)
1300                                 return;
1301                 }
1302
1303                 /* append */
1304                 tmp = pkt_len - usbtouch->buf_len;
1305                 if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size)
1306                         goto out_flush_buf;
1307                 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp);
1308                 usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len);
1309
1310                 buffer = pkt + tmp;
1311                 buf_len = len - tmp;
1312         } else {
1313                 buffer = pkt;
1314                 buf_len = len;
1315         }
1316
1317         /* loop over the received packet, process */
1318         pos = 0;
1319         while (pos < buf_len) {
1320                 /* get packet len */
1321                 pkt_len = usbtouch->type->get_pkt_len(buffer + pos,
1322                                                         buf_len - pos);
1323
1324                 /* unknown packet: skip one byte */
1325                 if (unlikely(!pkt_len)) {
1326                         pos++;
1327                         continue;
1328                 }
1329
1330                 /* full packet: process */
1331                 if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) {
1332                         usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len);
1333                 } else {
1334                         /* incomplete packet: save in buffer */
1335                         memcpy(usbtouch->buffer, buffer + pos, buf_len - pos);
1336                         usbtouch->buf_len = buf_len - pos;
1337                         return;
1338                 }
1339                 pos += pkt_len;
1340         }
1341
1342 out_flush_buf:
1343         usbtouch->buf_len = 0;
1344         return;
1345 }
1346 #endif
1347
1348
1349 static void usbtouch_irq(struct urb *urb)
1350 {
1351         struct usbtouch_usb *usbtouch = urb->context;
1352         int retval;
1353
1354         switch (urb->status) {
1355         case 0:
1356                 /* success */
1357                 break;
1358         case -ETIME:
1359                 /* this urb is timing out */
1360                 dbg("%s - urb timed out - was the device unplugged?",
1361                     __func__);
1362                 return;
1363         case -ECONNRESET:
1364         case -ENOENT:
1365         case -ESHUTDOWN:
1366         case -EPIPE:
1367                 /* this urb is terminated, clean up */
1368                 dbg("%s - urb shutting down with status: %d",
1369                     __func__, urb->status);
1370                 return;
1371         default:
1372                 dbg("%s - nonzero urb status received: %d",
1373                     __func__, urb->status);
1374                 goto exit;
1375         }
1376
1377         usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length);
1378
1379 exit:
1380         usb_mark_last_busy(interface_to_usbdev(usbtouch->interface));
1381         retval = usb_submit_urb(urb, GFP_ATOMIC);
1382         if (retval)
1383                 err("%s - usb_submit_urb failed with result: %d",
1384                     __func__, retval);
1385 }
1386
1387 static int usbtouch_open(struct input_dev *input)
1388 {
1389         struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1390         int r;
1391
1392         usbtouch->irq->dev = interface_to_usbdev(usbtouch->interface);
1393
1394         r = usb_autopm_get_interface(usbtouch->interface) ? -EIO : 0;
1395         if (r < 0)
1396                 goto out;
1397
1398         if (!usbtouch->type->irq_always) {
1399                 if (usb_submit_urb(usbtouch->irq, GFP_KERNEL)) {
1400                         r = -EIO;
1401                         goto out_put;
1402                 }
1403         }
1404
1405         usbtouch->interface->needs_remote_wakeup = 1;
1406 out_put:
1407         usb_autopm_put_interface(usbtouch->interface);
1408 out:
1409         return r;
1410 }
1411
1412 static void usbtouch_close(struct input_dev *input)
1413 {
1414         struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1415         int r;
1416
1417         if (!usbtouch->type->irq_always)
1418                 usb_kill_urb(usbtouch->irq);
1419         r = usb_autopm_get_interface(usbtouch->interface);
1420         usbtouch->interface->needs_remote_wakeup = 0;
1421         if (!r)
1422                 usb_autopm_put_interface(usbtouch->interface);
1423 }
1424
1425 static int usbtouch_suspend
1426 (struct usb_interface *intf, pm_message_t message)
1427 {
1428         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1429
1430         usb_kill_urb(usbtouch->irq);
1431
1432         return 0;
1433 }
1434
1435 static int usbtouch_resume(struct usb_interface *intf)
1436 {
1437         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1438         struct input_dev *input = usbtouch->input;
1439         int result = 0;
1440
1441         mutex_lock(&input->mutex);
1442         if (input->users || usbtouch->type->irq_always)
1443                 result = usb_submit_urb(usbtouch->irq, GFP_NOIO);
1444         mutex_unlock(&input->mutex);
1445
1446         return result;
1447 }
1448
1449 static int usbtouch_reset_resume(struct usb_interface *intf)
1450 {
1451         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1452         struct input_dev *input = usbtouch->input;
1453         int err = 0;
1454
1455         /* reinit the device */
1456         if (usbtouch->type->init) {
1457                 err = usbtouch->type->init(usbtouch);
1458                 if (err) {
1459                         dbg("%s - type->init() failed, err: %d",
1460                             __func__, err);
1461                         return err;
1462                 }
1463         }
1464
1465         /* restart IO if needed */
1466         mutex_lock(&input->mutex);
1467         if (input->users)
1468                 err = usb_submit_urb(usbtouch->irq, GFP_NOIO);
1469         mutex_unlock(&input->mutex);
1470
1471         return err;
1472 }
1473
1474 static void usbtouch_free_buffers(struct usb_device *udev,
1475                                   struct usbtouch_usb *usbtouch)
1476 {
1477         usb_free_coherent(udev, usbtouch->type->rept_size,
1478                           usbtouch->data, usbtouch->data_dma);
1479         kfree(usbtouch->buffer);
1480 }
1481
1482 static struct usb_endpoint_descriptor *
1483 usbtouch_get_input_endpoint(struct usb_host_interface *interface)
1484 {
1485         int i;
1486
1487         for (i = 0; i < interface->desc.bNumEndpoints; i++)
1488                 if (usb_endpoint_dir_in(&interface->endpoint[i].desc))
1489                         return &interface->endpoint[i].desc;
1490
1491         return NULL;
1492 }
1493
1494 static int usbtouch_probe(struct usb_interface *intf,
1495                           const struct usb_device_id *id)
1496 {
1497         struct usbtouch_usb *usbtouch;
1498         struct input_dev *input_dev;
1499         struct usb_endpoint_descriptor *endpoint;
1500         struct usb_device *udev = interface_to_usbdev(intf);
1501         struct usbtouch_device_info *type;
1502         int err = -ENOMEM;
1503
1504         /* some devices are ignored */
1505         if (id->driver_info == DEVTYPE_IGNORE)
1506                 return -ENODEV;
1507
1508         endpoint = usbtouch_get_input_endpoint(intf->cur_altsetting);
1509         if (!endpoint)
1510                 return -ENXIO;
1511
1512         usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL);
1513         input_dev = input_allocate_device();
1514         if (!usbtouch || !input_dev)
1515                 goto out_free;
1516
1517         type = &usbtouch_dev_info[id->driver_info];
1518         usbtouch->type = type;
1519         if (!type->process_pkt)
1520                 type->process_pkt = usbtouch_process_pkt;
1521
1522         usbtouch->data = usb_alloc_coherent(udev, type->rept_size,
1523                                             GFP_KERNEL, &usbtouch->data_dma);
1524         if (!usbtouch->data)
1525                 goto out_free;
1526
1527         if (type->get_pkt_len) {
1528                 usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL);
1529                 if (!usbtouch->buffer)
1530                         goto out_free_buffers;
1531         }
1532
1533         usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
1534         if (!usbtouch->irq) {
1535                 dbg("%s - usb_alloc_urb failed: usbtouch->irq", __func__);
1536                 goto out_free_buffers;
1537         }
1538
1539         usbtouch->interface = intf;
1540         usbtouch->input = input_dev;
1541
1542         if (udev->manufacturer)
1543                 strlcpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name));
1544
1545         if (udev->product) {
1546                 if (udev->manufacturer)
1547                         strlcat(usbtouch->name, " ", sizeof(usbtouch->name));
1548                 strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name));
1549         }
1550
1551         if (!strlen(usbtouch->name))
1552                 snprintf(usbtouch->name, sizeof(usbtouch->name),
1553                         "USB Touchscreen %04x:%04x",
1554                          le16_to_cpu(udev->descriptor.idVendor),
1555                          le16_to_cpu(udev->descriptor.idProduct));
1556
1557         usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys));
1558         strlcat(usbtouch->phys, "/input0", sizeof(usbtouch->phys));
1559
1560         input_dev->name = usbtouch->name;
1561         input_dev->phys = usbtouch->phys;
1562         usb_to_input_id(udev, &input_dev->id);
1563         input_dev->dev.parent = &intf->dev;
1564
1565         input_set_drvdata(input_dev, usbtouch);
1566
1567         input_dev->open = usbtouch_open;
1568         input_dev->close = usbtouch_close;
1569
1570         input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
1571         input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
1572         input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0);
1573         input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0);
1574         if (type->max_press)
1575                 input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press,
1576                                      type->max_press, 0, 0);
1577
1578         if (usb_endpoint_type(endpoint) == USB_ENDPOINT_XFER_INT)
1579                 usb_fill_int_urb(usbtouch->irq, udev,
1580                          usb_rcvintpipe(udev, endpoint->bEndpointAddress),
1581                          usbtouch->data, type->rept_size,
1582                          usbtouch_irq, usbtouch, endpoint->bInterval);
1583         else
1584                 usb_fill_bulk_urb(usbtouch->irq, udev,
1585                          usb_rcvbulkpipe(udev, endpoint->bEndpointAddress),
1586                          usbtouch->data, type->rept_size,
1587                          usbtouch_irq, usbtouch);
1588
1589         usbtouch->irq->dev = udev;
1590         usbtouch->irq->transfer_dma = usbtouch->data_dma;
1591         usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1592
1593         /* device specific allocations */
1594         if (type->alloc) {
1595                 err = type->alloc(usbtouch);
1596                 if (err) {
1597                         dbg("%s - type->alloc() failed, err: %d", __func__, err);
1598                         goto out_free_urb;
1599                 }
1600         }
1601
1602         /* device specific initialisation*/
1603         if (type->init) {
1604                 err = type->init(usbtouch);
1605                 if (err) {
1606                         dbg("%s - type->init() failed, err: %d", __func__, err);
1607                         goto out_do_exit;
1608                 }
1609         }
1610
1611         err = input_register_device(usbtouch->input);
1612         if (err) {
1613                 dbg("%s - input_register_device failed, err: %d", __func__, err);
1614                 goto out_do_exit;
1615         }
1616
1617         usb_set_intfdata(intf, usbtouch);
1618
1619         if (usbtouch->type->irq_always) {
1620                 /* this can't fail */
1621                 usb_autopm_get_interface(intf);
1622                 err = usb_submit_urb(usbtouch->irq, GFP_KERNEL);
1623                 if (err) {
1624                         usb_autopm_put_interface(intf);
1625                         err("%s - usb_submit_urb failed with result: %d",
1626                             __func__, err);
1627                         goto out_unregister_input;
1628                 }
1629         }
1630
1631         return 0;
1632
1633 out_unregister_input:
1634         input_unregister_device(input_dev);
1635         input_dev = NULL;
1636 out_do_exit:
1637         if (type->exit)
1638                 type->exit(usbtouch);
1639 out_free_urb:
1640         usb_free_urb(usbtouch->irq);
1641 out_free_buffers:
1642         usbtouch_free_buffers(udev, usbtouch);
1643 out_free:
1644         input_free_device(input_dev);
1645         kfree(usbtouch);
1646         return err;
1647 }
1648
1649 static void usbtouch_disconnect(struct usb_interface *intf)
1650 {
1651         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1652
1653         dbg("%s - called", __func__);
1654
1655         if (!usbtouch)
1656                 return;
1657
1658         dbg("%s - usbtouch is initialized, cleaning up", __func__);
1659         usb_set_intfdata(intf, NULL);
1660         /* this will stop IO via close */
1661         input_unregister_device(usbtouch->input);
1662         usb_free_urb(usbtouch->irq);
1663         if (usbtouch->type->exit)
1664                 usbtouch->type->exit(usbtouch);
1665         usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch);
1666         kfree(usbtouch);
1667 }
1668
1669 MODULE_DEVICE_TABLE(usb, usbtouch_devices);
1670
1671 static struct usb_driver usbtouch_driver = {
1672         .name           = "usbtouchscreen",
1673         .probe          = usbtouch_probe,
1674         .disconnect     = usbtouch_disconnect,
1675         .suspend        = usbtouch_suspend,
1676         .resume         = usbtouch_resume,
1677         .reset_resume   = usbtouch_reset_resume,
1678         .id_table       = usbtouch_devices,
1679         .supports_autosuspend = 1,
1680 };
1681
1682 module_usb_driver(usbtouch_driver);
1683
1684 MODULE_AUTHOR(DRIVER_AUTHOR);
1685 MODULE_DESCRIPTION(DRIVER_DESC);
1686 MODULE_LICENSE("GPL");
1687
1688 MODULE_ALIAS("touchkitusb");
1689 MODULE_ALIAS("itmtouch");
1690 MODULE_ALIAS("mtouchusb");