SAFE public projects git trees. - safe/jmp/linux-2.6/blob - 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  *
  20  * Copyright (C) 2004-2007 by Daniel Ritz <daniel.ritz@gmx.ch>
  21  * Copyright (C) by Todd E. Johnson (mtouchusb.c)
  22  *
  23  * This program is free software; you can redistribute it and/or
  24  * modify it under the terms of the GNU General Public License as
  25  * published by the Free Software Foundation; either version 2 of the
  26  * License, or (at your option) any later version.
  27  *
  28  * This program is distributed in the hope that it will be useful, but
  29  * WITHOUT ANY WARRANTY; without even the implied warranty of
  30  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  31  * General Public License for more details.
  32  *
  33  * You should have received a copy of the GNU General Public License
  34  * along with this program; if not, write to the Free Software
  35  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  36  *
  37  * Driver is based on touchkitusb.c
  38  * - ITM parts are from itmtouch.c
  39  * - 3M parts are from mtouchusb.c
  40  * - PanJit parts are from an unmerged driver by Lanslott Gish
  41  * - DMC TSC 10/25 are from Holger Schurig, with ideas from an unmerged
  42  *   driver from Marius Vollmer
  43  *
  44  *****************************************************************************/
  45
  46 //#define DEBUG
  47
  48 #include <linux/kernel.h>
  49 #include <linux/slab.h>
  50 #include <linux/input.h>
  51 #include <linux/module.h>
  52 #include <linux/init.h>
  53 #include <linux/usb.h>
  54 #include <linux/usb/input.h>
  55 #include <linux/hid.h>
  56
  57
  58 #define DRIVER_VERSION          "v0.6"
  59 #define DRIVER_AUTHOR           "Daniel Ritz <daniel.ritz@gmx.ch>"
  60 #define DRIVER_DESC             "USB Touchscreen Driver"
  61
  62 static int swap_xy;
  63 module_param(swap_xy, bool, 0644);
  64 MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");
  65
  66 static int hwcalib_xy;
  67 module_param(hwcalib_xy, bool, 0644);
  68 MODULE_PARM_DESC(hwcalib_xy, "If set hw-calibrated X/Y are used if available");
  69
  70 /* device specifc data/functions */
  71 struct usbtouch_usb;
  72 struct usbtouch_device_info {
  73         int min_xc, max_xc;
  74         int min_yc, max_yc;
  75         int min_press, max_press;
  76         int rept_size;
  77
  78         /*
  79          * Always service the USB devices irq not just when the input device is
  80          * open. This is useful when devices have a watchdog which prevents us
  81          * from periodically polling the device. Leave this unset unless your
  82          * touchscreen device requires it, as it does consume more of the USB
  83          * bandwidth.
  84          */
  85         bool irq_always;
  86
  87         void (*process_pkt) (struct usbtouch_usb *usbtouch, unsigned char *pkt, int len);
  88
  89         /*
  90          * used to get the packet len. possible return values:
  91          * > 0: packet len
  92          * = 0: skip one byte
  93          * < 0: -return value more bytes needed
  94          */
  95         int  (*get_pkt_len) (unsigned char *pkt, int len);
  96
  97         int  (*read_data)   (struct usbtouch_usb *usbtouch, unsigned char *pkt);
  98         int  (*init)        (struct usbtouch_usb *usbtouch);
  99         void (*exit)        (struct usbtouch_usb *usbtouch);
 100 };
 101
 102 /* a usbtouch device */
 103 struct usbtouch_usb {
 104         unsigned char *data;
 105         dma_addr_t data_dma;
 106         unsigned char *buffer;
 107         int buf_len;
 108         struct urb *irq;
 109         struct usb_interface *interface;
 110         struct input_dev *input;
 111         struct usbtouch_device_info *type;
 112         char name[128];
 113         char phys[64];
 114         void *priv;
 115
 116         int x, y;
 117         int touch, press;
 118 };
 119
 120
 121 /* device types */
 122 enum {
 123         DEVTYPE_IGNORE = -1,
 124         DEVTYPE_EGALAX,
 125         DEVTYPE_PANJIT,
 126         DEVTYPE_3M,
 127         DEVTYPE_ITM,
 128         DEVTYPE_ETURBO,
 129         DEVTYPE_GUNZE,
 130         DEVTYPE_DMC_TSC10,
 131         DEVTYPE_IRTOUCH,
 132         DEVTYPE_IDEALTEK,
 133         DEVTYPE_GENERAL_TOUCH,
 134         DEVTYPE_GOTOP,
 135         DEVTYPE_JASTEC,
 136         DEVTYPE_E2I,
 137         DEVTYPE_ZYTRONIC,
 138         DEVTYPE_TC5UH,
 139         DEVTYPE_NEXIO,
 140 };
 141
 142 #define USB_DEVICE_HID_CLASS(vend, prod) \
 143         .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS \
 144                 | USB_DEVICE_ID_MATCH_INT_PROTOCOL \
 145                 | USB_DEVICE_ID_MATCH_DEVICE, \
 146         .idVendor = (vend), \
 147         .idProduct = (prod), \
 148         .bInterfaceClass = USB_INTERFACE_CLASS_HID, \
 149         .bInterfaceProtocol = USB_INTERFACE_PROTOCOL_MOUSE
 150
 151 static const struct usb_device_id usbtouch_devices[] = {
 152 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
 153         /* ignore the HID capable devices, handled by usbhid */
 154         {USB_DEVICE_HID_CLASS(0x0eef, 0x0001), .driver_info = DEVTYPE_IGNORE},
 155         {USB_DEVICE_HID_CLASS(0x0eef, 0x0002), .driver_info = DEVTYPE_IGNORE},
 156
 157         /* normal device IDs */
 158         {USB_DEVICE(0x3823, 0x0001), .driver_info = DEVTYPE_EGALAX},
 159         {USB_DEVICE(0x3823, 0x0002), .driver_info = DEVTYPE_EGALAX},
 160         {USB_DEVICE(0x0123, 0x0001), .driver_info = DEVTYPE_EGALAX},
 161         {USB_DEVICE(0x0eef, 0x0001), .driver_info = DEVTYPE_EGALAX},
 162         {USB_DEVICE(0x0eef, 0x0002), .driver_info = DEVTYPE_EGALAX},
 163         {USB_DEVICE(0x1234, 0x0001), .driver_info = DEVTYPE_EGALAX},
 164         {USB_DEVICE(0x1234, 0x0002), .driver_info = DEVTYPE_EGALAX},
 165 #endif
 166
 167 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
 168         {USB_DEVICE(0x134c, 0x0001), .driver_info = DEVTYPE_PANJIT},
 169         {USB_DEVICE(0x134c, 0x0002), .driver_info = DEVTYPE_PANJIT},
 170         {USB_DEVICE(0x134c, 0x0003), .driver_info = DEVTYPE_PANJIT},
 171         {USB_DEVICE(0x134c, 0x0004), .driver_info = DEVTYPE_PANJIT},
 172 #endif
 173
 174 #ifdef CONFIG_TOUCHSCREEN_USB_3M
 175         {USB_DEVICE(0x0596, 0x0001), .driver_info = DEVTYPE_3M},
 176 #endif
 177
 178 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
 179         {USB_DEVICE(0x0403, 0xf9e9), .driver_info = DEVTYPE_ITM},
 180 #endif
 181
 182 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
 183         {USB_DEVICE(0x1234, 0x5678), .driver_info = DEVTYPE_ETURBO},
 184 #endif
 185
 186 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
 187         {USB_DEVICE(0x0637, 0x0001), .driver_info = DEVTYPE_GUNZE},
 188 #endif
 189
 190 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
 191         {USB_DEVICE(0x0afa, 0x03e8), .driver_info = DEVTYPE_DMC_TSC10},
 192 #endif
 193
 194 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
 195         {USB_DEVICE(0x595a, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
 196         {USB_DEVICE(0x6615, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
 197 #endif
 198
 199 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
 200         {USB_DEVICE(0x1391, 0x1000), .driver_info = DEVTYPE_IDEALTEK},
 201 #endif
 202
 203 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
 204         {USB_DEVICE(0x0dfc, 0x0001), .driver_info = DEVTYPE_GENERAL_TOUCH},
 205 #endif
 206
 207 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
 208         {USB_DEVICE(0x08f2, 0x007f), .driver_info = DEVTYPE_GOTOP},
 209         {USB_DEVICE(0x08f2, 0x00ce), .driver_info = DEVTYPE_GOTOP},
 210         {USB_DEVICE(0x08f2, 0x00f4), .driver_info = DEVTYPE_GOTOP},
 211 #endif
 212
 213 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
 214         {USB_DEVICE(0x0f92, 0x0001), .driver_info = DEVTYPE_JASTEC},
 215 #endif
 216
 217 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
 218         {USB_DEVICE(0x1ac7, 0x0001), .driver_info = DEVTYPE_E2I},
 219 #endif
 220
 221 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
 222         {USB_DEVICE(0x14c8, 0x0003), .driver_info = DEVTYPE_ZYTRONIC},
 223 #endif
 224
 225 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC5UH
 226         {USB_DEVICE(0x0664, 0x0309), .driver_info = DEVTYPE_TC5UH},
 227 #endif
 228
 229 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
 230         /* data interface only */
 231         {USB_DEVICE_AND_INTERFACE_INFO(0x10f0, 0x2002, 0x0a, 0x00, 0x00),
 232                 .driver_info = DEVTYPE_NEXIO},
 233         {USB_DEVICE_AND_INTERFACE_INFO(0x1870, 0x0001, 0x0a, 0x00, 0x00),
 234                 .driver_info = DEVTYPE_NEXIO},
 235 #endif
 236
 237         {}
 238 };
 239
 240
 241 /*****************************************************************************
 242  * e2i Part
 243  */
 244
 245 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
 246 static int e2i_init(struct usbtouch_usb *usbtouch)
 247 {
 248         int ret;
 249         struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
 250
 251         ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
 252                               0x01, 0x02, 0x0000, 0x0081,
 253                               NULL, 0, USB_CTRL_SET_TIMEOUT);
 254
 255         dbg("%s - usb_control_msg - E2I_RESET - bytes|err: %d",
 256             __func__, ret);
 257         return ret;
 258 }
 259
 260 static int e2i_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 261 {
 262         int tmp = (pkt[0] << 8) | pkt[1];
 263         dev->x  = (pkt[2] << 8) | pkt[3];
 264         dev->y  = (pkt[4] << 8) | pkt[5];
 265
 266         tmp = tmp - 0xA000;
 267         dev->touch = (tmp > 0);
 268         dev->press = (tmp > 0 ? tmp : 0);
 269
 270         return 1;
 271 }
 272 #endif
 273
 274
 275 /*****************************************************************************
 276  * eGalax part
 277  */
 278
 279 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
 280
 281 #ifndef MULTI_PACKET
 282 #define MULTI_PACKET
 283 #endif
 284
 285 #define EGALAX_PKT_TYPE_MASK            0xFE
 286 #define EGALAX_PKT_TYPE_REPT            0x80
 287 #define EGALAX_PKT_TYPE_DIAG            0x0A
 288
 289 static int egalax_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 290 {
 291         if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT)
 292                 return 0;
 293
 294         dev->x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F);
 295         dev->y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F);
 296         dev->touch = pkt[0] & 0x01;
 297
 298         return 1;
 299 }
 300
 301 static int egalax_get_pkt_len(unsigned char *buf, int len)
 302 {
 303         switch (buf[0] & EGALAX_PKT_TYPE_MASK) {
 304         case EGALAX_PKT_TYPE_REPT:
 305                 return 5;
 306
 307         case EGALAX_PKT_TYPE_DIAG:
 308                 if (len < 2)
 309                         return -1;
 310
 311                 return buf[1] + 2;
 312         }
 313
 314         return 0;
 315 }
 316 #endif
 317
 318
 319 /*****************************************************************************
 320  * PanJit Part
 321  */
 322 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
 323 static int panjit_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 324 {
 325         dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
 326         dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
 327         dev->touch = pkt[0] & 0x01;
 328
 329         return 1;
 330 }
 331 #endif
 332
 333
 334 /*****************************************************************************
 335  * 3M/Microtouch Part
 336  */
 337 #ifdef CONFIG_TOUCHSCREEN_USB_3M
 338
 339 #define MTOUCHUSB_ASYNC_REPORT          1
 340 #define MTOUCHUSB_RESET                 7
 341 #define MTOUCHUSB_REQ_CTRLLR_ID         10
 342
 343 static int mtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 344 {
 345         if (hwcalib_xy) {
 346                 dev->x = (pkt[4] << 8) | pkt[3];
 347                 dev->y = 0xffff - ((pkt[6] << 8) | pkt[5]);
 348         } else {
 349                 dev->x = (pkt[8] << 8) | pkt[7];
 350                 dev->y = (pkt[10] << 8) | pkt[9];
 351         }
 352         dev->touch = (pkt[2] & 0x40) ? 1 : 0;
 353
 354         return 1;
 355 }
 356
 357 static int mtouch_init(struct usbtouch_usb *usbtouch)
 358 {
 359         int ret, i;
 360         struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
 361
 362         ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
 363                               MTOUCHUSB_RESET,
 364                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 365                               1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
 366         dbg("%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d",
 367             __func__, ret);
 368         if (ret < 0)
 369                 return ret;
 370         msleep(150);
 371
 372         for (i = 0; i < 3; i++) {
 373                 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
 374                                       MTOUCHUSB_ASYNC_REPORT,
 375                                       USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 376                                       1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT);
 377                 dbg("%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d",
 378                     __func__, ret);
 379                 if (ret >= 0)
 380                         break;
 381                 if (ret != -EPIPE)
 382                         return ret;
 383         }
 384
 385         /* Default min/max xy are the raw values, override if using hw-calib */
 386         if (hwcalib_xy) {
 387                 input_set_abs_params(usbtouch->input, ABS_X, 0, 0xffff, 0, 0);
 388                 input_set_abs_params(usbtouch->input, ABS_Y, 0, 0xffff, 0, 0);
 389         }
 390
 391         return 0;
 392 }
 393 #endif
 394
 395
 396 /*****************************************************************************
 397  * ITM Part
 398  */
 399 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
 400 static int itm_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 401 {
 402         int touch;
 403         /*
 404          * ITM devices report invalid x/y data if not touched.
 405          * if the screen was touched before but is not touched any more
 406          * report touch as 0 with the last valid x/y data once. then stop
 407          * reporting data until touched again.
 408          */
 409         dev->press = ((pkt[2] & 0x01) << 7) | (pkt[5] & 0x7F);
 410
 411         touch = ~pkt[7] & 0x20;
 412         if (!touch) {
 413                 if (dev->touch) {
 414                         dev->touch = 0;
 415                         return 1;
 416                 }
 417
 418                 return 0;
 419         }
 420
 421         dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F);
 422         dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F);
 423         dev->touch = touch;
 424
 425         return 1;
 426 }
 427 #endif
 428
 429
 430 /*****************************************************************************
 431  * eTurboTouch part
 432  */
 433 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
 434 #ifndef MULTI_PACKET
 435 #define MULTI_PACKET
 436 #endif
 437 static int eturbo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 438 {
 439         unsigned int shift;
 440
 441         /* packets should start with sync */
 442         if (!(pkt[0] & 0x80))
 443                 return 0;
 444
 445         shift = (6 - (pkt[0] & 0x03));
 446         dev->x = ((pkt[3] << 7) | pkt[4]) >> shift;
 447         dev->y = ((pkt[1] << 7) | pkt[2]) >> shift;
 448         dev->touch = (pkt[0] & 0x10) ? 1 : 0;
 449
 450         return 1;
 451 }
 452
 453 static int eturbo_get_pkt_len(unsigned char *buf, int len)
 454 {
 455         if (buf[0] & 0x80)
 456                 return 5;
 457         if (buf[0] == 0x01)
 458                 return 3;
 459         return 0;
 460 }
 461 #endif
 462
 463
 464 /*****************************************************************************
 465  * Gunze part
 466  */
 467 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
 468 static int gunze_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 469 {
 470         if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80))
 471                 return 0;
 472
 473         dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F);
 474         dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F);
 475         dev->touch = pkt[0] & 0x20;
 476
 477         return 1;
 478 }
 479 #endif
 480
 481 /*****************************************************************************
 482  * DMC TSC-10/25 Part
 483  *
 484  * Documentation about the controller and it's protocol can be found at
 485  *   http://www.dmccoltd.com/files/controler/tsc10usb_pi_e.pdf
 486  *   http://www.dmccoltd.com/files/controler/tsc25_usb_e.pdf
 487  */
 488 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
 489
 490 /* supported data rates. currently using 130 */
 491 #define TSC10_RATE_POINT        0x50
 492 #define TSC10_RATE_30           0x40
 493 #define TSC10_RATE_50           0x41
 494 #define TSC10_RATE_80           0x42
 495 #define TSC10_RATE_100          0x43
 496 #define TSC10_RATE_130          0x44
 497 #define TSC10_RATE_150          0x45
 498
 499 /* commands */
 500 #define TSC10_CMD_RESET         0x55
 501 #define TSC10_CMD_RATE          0x05
 502 #define TSC10_CMD_DATA1         0x01
 503
 504 static int dmc_tsc10_init(struct usbtouch_usb *usbtouch)
 505 {
 506         struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
 507         int ret = -ENOMEM;
 508         unsigned char *buf;
 509
 510         buf = kmalloc(2, GFP_KERNEL);
 511         if (!buf)
 512                 goto err_nobuf;
 513         /* reset */
 514         buf[0] = buf[1] = 0xFF;
 515         ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
 516                               TSC10_CMD_RESET,
 517                               USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 518                               0, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
 519         if (ret < 0)
 520                 goto err_out;
 521         if (buf[0] != 0x06) {
 522                 ret = -ENODEV;
 523                 goto err_out;
 524         }
 525
 526         /* set coordinate output rate */
 527         buf[0] = buf[1] = 0xFF;
 528         ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
 529                               TSC10_CMD_RATE,
 530                               USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 531                               TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
 532         if (ret < 0)
 533                 goto err_out;
 534         if ((buf[0] != 0x06) && (buf[0] != 0x15 || buf[1] != 0x01)) {
 535                 ret = -ENODEV;
 536                 goto err_out;
 537         }
 538
 539         /* start sending data */
 540         ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
 541                               TSC10_CMD_DATA1,
 542                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 543                               0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
 544 err_out:
 545         kfree(buf);
 546 err_nobuf:
 547         return ret;
 548 }
 549
 550
 551 static int dmc_tsc10_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 552 {
 553         dev->x = ((pkt[2] & 0x03) << 8) | pkt[1];
 554         dev->y = ((pkt[4] & 0x03) << 8) | pkt[3];
 555         dev->touch = pkt[0] & 0x01;
 556
 557         return 1;
 558 }
 559 #endif
 560
 561
 562 /*****************************************************************************
 563  * IRTOUCH Part
 564  */
 565 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
 566 static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 567 {
 568         dev->x = (pkt[3] << 8) | pkt[2];
 569         dev->y = (pkt[5] << 8) | pkt[4];
 570         dev->touch = (pkt[1] & 0x03) ? 1 : 0;
 571
 572         return 1;
 573 }
 574 #endif
 575
 576 /*****************************************************************************
 577  * ET&T TC5UH part
 578  */
 579 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC5UH
 580 static int tc5uh_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 581 {
 582         dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
 583         dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
 584         dev->touch = pkt[0] & 0x01;
 585
 586         return 1;
 587 }
 588 #endif
 589
 590 /*****************************************************************************
 591  * IdealTEK URTC1000 Part
 592  */
 593 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
 594 #ifndef MULTI_PACKET
 595 #define MULTI_PACKET
 596 #endif
 597 static int idealtek_get_pkt_len(unsigned char *buf, int len)
 598 {
 599         if (buf[0] & 0x80)
 600                 return 5;
 601         if (buf[0] == 0x01)
 602                 return len;
 603         return 0;
 604 }
 605
 606 static int idealtek_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 607 {
 608         switch (pkt[0] & 0x98) {
 609         case 0x88:
 610                 /* touch data in IdealTEK mode */
 611                 dev->x = (pkt[1] << 5) | (pkt[2] >> 2);
 612                 dev->y = (pkt[3] << 5) | (pkt[4] >> 2);
 613                 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
 614                 return 1;
 615
 616         case 0x98:
 617                 /* touch data in MT emulation mode */
 618                 dev->x = (pkt[2] << 5) | (pkt[1] >> 2);
 619                 dev->y = (pkt[4] << 5) | (pkt[3] >> 2);
 620                 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
 621                 return 1;
 622
 623         default:
 624                 return 0;
 625         }
 626 }
 627 #endif
 628
 629 /*****************************************************************************
 630  * General Touch Part
 631  */
 632 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
 633 static int general_touch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 634 {
 635         dev->x = (pkt[2] << 8) | pkt[1];
 636         dev->y = (pkt[4] << 8) | pkt[3];
 637         dev->press = pkt[5] & 0xff;
 638         dev->touch = pkt[0] & 0x01;
 639
 640         return 1;
 641 }
 642 #endif
 643
 644 /*****************************************************************************
 645  * GoTop Part
 646  */
 647 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
 648 static int gotop_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 649 {
 650         dev->x = ((pkt[1] & 0x38) << 4) | pkt[2];
 651         dev->y = ((pkt[1] & 0x07) << 7) | pkt[3];
 652         dev->touch = pkt[0] & 0x01;
 653
 654         return 1;
 655 }
 656 #endif
 657
 658 /*****************************************************************************
 659  * JASTEC Part
 660  */
 661 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
 662 static int jastec_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 663 {
 664         dev->x = ((pkt[0] & 0x3f) << 6) | (pkt[2] & 0x3f);
 665         dev->y = ((pkt[1] & 0x3f) << 6) | (pkt[3] & 0x3f);
 666         dev->touch = (pkt[0] & 0x40) >> 6;
 667
 668         return 1;
 669 }
 670 #endif
 671
 672 /*****************************************************************************
 673  * Zytronic Part
 674  */
 675 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
 676 static int zytronic_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 677 {
 678         switch (pkt[0]) {
 679         case 0x3A: /* command response */
 680                 dbg("%s: Command response %d", __func__, pkt[1]);
 681                 break;
 682
 683         case 0xC0: /* down */
 684                 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
 685                 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
 686                 dev->touch = 1;
 687                 dbg("%s: down %d,%d", __func__, dev->x, dev->y);
 688                 return 1;
 689
 690         case 0x80: /* up */
 691                 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
 692                 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
 693                 dev->touch = 0;
 694                 dbg("%s: up %d,%d", __func__, dev->x, dev->y);
 695                 return 1;
 696
 697         default:
 698                 dbg("%s: Unknown return %d", __func__, pkt[0]);
 699                 break;
 700         }
 701
 702         return 0;
 703 }
 704 #endif
 705
 706 /*****************************************************************************
 707  * NEXIO Part
 708  */
 709 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
 710
 711 #define NEXIO_TIMEOUT   5000
 712 #define NEXIO_BUFSIZE   1024
 713 #define NEXIO_THRESHOLD 50
 714
 715 struct nexio_priv {
 716         struct urb *ack;
 717         unsigned char *ack_buf;
 718 };
 719
 720 struct nexio_touch_packet {
 721         u8      flags;          /* 0xe1 = touch, 0xe1 = release */
 722         __be16  data_len;       /* total bytes of touch data */
 723         __be16  x_len;          /* bytes for X axis */
 724         __be16  y_len;          /* bytes for Y axis */
 725         u8      data[];
 726 } __attribute__ ((packed));
 727
 728 static unsigned char nexio_ack_pkt[2] = { 0xaa, 0x02 };
 729 static unsigned char nexio_init_pkt[4] = { 0x82, 0x04, 0x0a, 0x0f };
 730
 731 static void nexio_ack_complete(struct urb *urb)
 732 {
 733 }
 734
 735 static int nexio_init(struct usbtouch_usb *usbtouch)
 736 {
 737         struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
 738         struct usb_host_interface *interface = usbtouch->interface->cur_altsetting;
 739         struct nexio_priv *priv;
 740         int ret = -ENOMEM;
 741         int actual_len, i;
 742         unsigned char *buf;
 743         char *firmware_ver = NULL, *device_name = NULL;
 744         int input_ep = 0, output_ep = 0;
 745
 746         /* find first input and output endpoint */
 747         for (i = 0; i < interface->desc.bNumEndpoints; i++) {
 748                 if (!input_ep &&
 749                     usb_endpoint_dir_in(&interface->endpoint[i].desc))
 750                         input_ep = interface->endpoint[i].desc.bEndpointAddress;
 751                 if (!output_ep &&
 752                     usb_endpoint_dir_out(&interface->endpoint[i].desc))
 753                         output_ep = interface->endpoint[i].desc.bEndpointAddress;
 754         }
 755         if (!input_ep || !output_ep)
 756                 return -ENXIO;
 757
 758         buf = kmalloc(NEXIO_BUFSIZE, GFP_KERNEL);
 759         if (!buf)
 760                 goto out_buf;
 761
 762         /* two empty reads */
 763         for (i = 0; i < 2; i++) {
 764                 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
 765                                    buf, NEXIO_BUFSIZE, &actual_len,
 766                                    NEXIO_TIMEOUT);
 767                 if (ret < 0)
 768                         goto out_buf;
 769         }
 770
 771         /* send init command */
 772         memcpy(buf, nexio_init_pkt, sizeof(nexio_init_pkt));
 773         ret = usb_bulk_msg(dev, usb_sndbulkpipe(dev, output_ep),
 774                            buf, sizeof(nexio_init_pkt), &actual_len,
 775                            NEXIO_TIMEOUT);
 776         if (ret < 0)
 777                 goto out_buf;
 778
 779         /* read replies */
 780         for (i = 0; i < 3; i++) {
 781                 memset(buf, 0, NEXIO_BUFSIZE);
 782                 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
 783                                    buf, NEXIO_BUFSIZE, &actual_len,
 784                                    NEXIO_TIMEOUT);
 785                 if (ret < 0 || actual_len < 1 || buf[1] != actual_len)
 786                         continue;
 787                 switch (buf[0]) {
 788                 case 0x83:      /* firmware version */
 789                         if (!firmware_ver)
 790                                 firmware_ver = kstrdup(&buf[2], GFP_KERNEL);
 791                         break;
 792                 case 0x84:      /* device name */
 793                         if (!device_name)
 794                                 device_name = kstrdup(&buf[2], GFP_KERNEL);
 795                         break;
 796                 }
 797         }
 798
 799         printk(KERN_INFO "Nexio device: %s, firmware version: %s\n",
 800                device_name, firmware_ver);
 801
 802         kfree(firmware_ver);
 803         kfree(device_name);
 804
 805         /* prepare ACK URB */
 806         ret = -ENOMEM;
 807
 808         usbtouch->priv = kmalloc(sizeof(struct nexio_priv), GFP_KERNEL);
 809         if (!usbtouch->priv)
 810                 goto out_buf;
 811
 812         priv = usbtouch->priv;
 813
 814         priv->ack_buf = kmemdup(nexio_ack_pkt, sizeof(nexio_ack_pkt),
 815                                 GFP_KERNEL);
 816         if (!priv->ack_buf)
 817                 goto err_priv;
 818
 819         priv->ack = usb_alloc_urb(0, GFP_KERNEL);
 820         if (!priv->ack) {
 821                 dbg("%s - usb_alloc_urb failed: usbtouch->ack", __func__);
 822                 goto err_ack_buf;
 823         }
 824
 825         usb_fill_bulk_urb(priv->ack, dev, usb_sndbulkpipe(dev, output_ep),
 826                           priv->ack_buf, sizeof(nexio_ack_pkt),
 827                           nexio_ack_complete, usbtouch);
 828         ret = 0;
 829         goto out_buf;
 830
 831 err_ack_buf:
 832         kfree(priv->ack_buf);
 833 err_priv:
 834         kfree(priv);
 835 out_buf:
 836         kfree(buf);
 837         return ret;
 838 }
 839
 840 static void nexio_exit(struct usbtouch_usb *usbtouch)
 841 {
 842         struct nexio_priv *priv = usbtouch->priv;
 843
 844         usb_kill_urb(priv->ack);
 845         usb_free_urb(priv->ack);
 846         kfree(priv->ack_buf);
 847         kfree(priv);
 848 }
 849
 850 static int nexio_read_data(struct usbtouch_usb *usbtouch, unsigned char *pkt)
 851 {
 852         int x, y, begin_x, begin_y, end_x, end_y, w, h, ret;
 853         struct nexio_touch_packet *packet = (void *) pkt;
 854         struct nexio_priv *priv = usbtouch->priv;
 855
 856         /* got touch data? */
 857         if ((pkt[0] & 0xe0) != 0xe0)
 858                 return 0;
 859
 860         if (be16_to_cpu(packet->data_len) > 0xff)
 861                 packet->data_len = cpu_to_be16(be16_to_cpu(packet->data_len) - 0x100);
 862         if (be16_to_cpu(packet->x_len) > 0xff)
 863                 packet->x_len = cpu_to_be16(be16_to_cpu(packet->x_len) - 0x80);
 864
 865         /* send ACK */
 866         ret = usb_submit_urb(priv->ack, GFP_ATOMIC);
 867
 868         if (!usbtouch->type->max_xc) {
 869                 usbtouch->type->max_xc = 2 * be16_to_cpu(packet->x_len);
 870                 input_set_abs_params(usbtouch->input, ABS_X, 0,
 871                                      2 * be16_to_cpu(packet->x_len), 0, 0);
 872                 usbtouch->type->max_yc = 2 * be16_to_cpu(packet->y_len);
 873                 input_set_abs_params(usbtouch->input, ABS_Y, 0,
 874                                      2 * be16_to_cpu(packet->y_len), 0, 0);
 875         }
 876         /*
 877          * The device reports state of IR sensors on X and Y axes.
 878          * Each byte represents "darkness" percentage (0-100) of one element.
 879          * 17" touchscreen reports only 64 x 52 bytes so the resolution is low.
 880          * This also means that there's a limited multi-touch capability but
 881          * it's disabled (and untested) here as there's no X driver for that.
 882          */
 883         begin_x = end_x = begin_y = end_y = -1;
 884         for (x = 0; x < be16_to_cpu(packet->x_len); x++) {
 885                 if (begin_x == -1 && packet->data[x] > NEXIO_THRESHOLD) {
 886                         begin_x = x;
 887                         continue;
 888                 }
 889                 if (end_x == -1 && begin_x != -1 && packet->data[x] < NEXIO_THRESHOLD) {
 890                         end_x = x - 1;
 891                         for (y = be16_to_cpu(packet->x_len);
 892                              y < be16_to_cpu(packet->data_len); y++) {
 893                                 if (begin_y == -1 && packet->data[y] > NEXIO_THRESHOLD) {
 894                                         begin_y = y - be16_to_cpu(packet->x_len);
 895                                         continue;
 896                                 }
 897                                 if (end_y == -1 &&
 898                                     begin_y != -1 && packet->data[y] < NEXIO_THRESHOLD) {
 899                                         end_y = y - 1 - be16_to_cpu(packet->x_len);
 900                                         w = end_x - begin_x;
 901                                         h = end_y - begin_y;
 902 #if 0
 903                                         /* multi-touch */
 904                                         input_report_abs(usbtouch->input,
 905                                                     ABS_MT_TOUCH_MAJOR, max(w,h));
 906                                         input_report_abs(usbtouch->input,
 907                                                     ABS_MT_TOUCH_MINOR, min(x,h));
 908                                         input_report_abs(usbtouch->input,
 909                                                     ABS_MT_POSITION_X, 2*begin_x+w);
 910                                         input_report_abs(usbtouch->input,
 911                                                     ABS_MT_POSITION_Y, 2*begin_y+h);
 912                                         input_report_abs(usbtouch->input,
 913                                                     ABS_MT_ORIENTATION, w > h);
 914                                         input_mt_sync(usbtouch->input);
 915 #endif
 916                                         /* single touch */
 917                                         usbtouch->x = 2 * begin_x + w;
 918                                         usbtouch->y = 2 * begin_y + h;
 919                                         usbtouch->touch = packet->flags & 0x01;
 920                                         begin_y = end_y = -1;
 921                                         return 1;
 922                                 }
 923                         }
 924                         begin_x = end_x = -1;
 925                 }
 926
 927         }
 928         return 0;
 929 }
 930 #endif
 931
 932
 933 /*****************************************************************************
 934  * the different device descriptors
 935  */
 936 #ifdef MULTI_PACKET
 937 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
 938                                    unsigned char *pkt, int len);
 939 #endif
 940
 941 static struct usbtouch_device_info usbtouch_dev_info[] = {
 942 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
 943         [DEVTYPE_EGALAX] = {
 944                 .min_xc         = 0x0,
 945                 .max_xc         = 0x07ff,
 946                 .min_yc         = 0x0,
 947                 .max_yc         = 0x07ff,
 948                 .rept_size      = 16,
 949                 .process_pkt    = usbtouch_process_multi,
 950                 .get_pkt_len    = egalax_get_pkt_len,
 951                 .read_data      = egalax_read_data,
 952         },
 953 #endif
 954
 955 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
 956         [DEVTYPE_PANJIT] = {
 957                 .min_xc         = 0x0,
 958                 .max_xc         = 0x0fff,
 959                 .min_yc         = 0x0,
 960                 .max_yc         = 0x0fff,
 961                 .rept_size      = 8,
 962                 .read_data      = panjit_read_data,
 963         },
 964 #endif
 965
 966 #ifdef CONFIG_TOUCHSCREEN_USB_3M
 967         [DEVTYPE_3M] = {
 968                 .min_xc         = 0x0,
 969                 .max_xc         = 0x4000,
 970                 .min_yc         = 0x0,
 971                 .max_yc         = 0x4000,
 972                 .rept_size      = 11,
 973                 .read_data      = mtouch_read_data,
 974                 .init           = mtouch_init,
 975         },
 976 #endif
 977
 978 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
 979         [DEVTYPE_ITM] = {
 980                 .min_xc         = 0x0,
 981                 .max_xc         = 0x0fff,
 982                 .min_yc         = 0x0,
 983                 .max_yc         = 0x0fff,
 984                 .max_press      = 0xff,
 985                 .rept_size      = 8,
 986                 .read_data      = itm_read_data,
 987         },
 988 #endif
 989
 990 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
 991         [DEVTYPE_ETURBO] = {
 992                 .min_xc         = 0x0,
 993                 .max_xc         = 0x07ff,
 994                 .min_yc         = 0x0,
 995                 .max_yc         = 0x07ff,
 996                 .rept_size      = 8,
 997                 .process_pkt    = usbtouch_process_multi,
 998                 .get_pkt_len    = eturbo_get_pkt_len,
 999                 .read_data      = eturbo_read_data,
1000         },
1001 #endif
1002
1003 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
1004         [DEVTYPE_GUNZE] = {
1005                 .min_xc         = 0x0,
1006                 .max_xc         = 0x0fff,
1007                 .min_yc         = 0x0,
1008                 .max_yc         = 0x0fff,
1009                 .rept_size      = 4,
1010                 .read_data      = gunze_read_data,
1011         },
1012 #endif
1013
1014 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
1015         [DEVTYPE_DMC_TSC10] = {
1016                 .min_xc         = 0x0,
1017                 .max_xc         = 0x03ff,
1018                 .min_yc         = 0x0,
1019                 .max_yc         = 0x03ff,
1020                 .rept_size      = 5,
1021                 .init           = dmc_tsc10_init,
1022                 .read_data      = dmc_tsc10_read_data,
1023         },
1024 #endif
1025
1026 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
1027         [DEVTYPE_IRTOUCH] = {
1028                 .min_xc         = 0x0,
1029                 .max_xc         = 0x0fff,
1030                 .min_yc         = 0x0,
1031                 .max_yc         = 0x0fff,
1032                 .rept_size      = 8,
1033                 .read_data      = irtouch_read_data,
1034         },
1035 #endif
1036
1037 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
1038         [DEVTYPE_IDEALTEK] = {
1039                 .min_xc         = 0x0,
1040                 .max_xc         = 0x0fff,
1041                 .min_yc         = 0x0,
1042                 .max_yc         = 0x0fff,
1043                 .rept_size      = 8,
1044                 .process_pkt    = usbtouch_process_multi,
1045                 .get_pkt_len    = idealtek_get_pkt_len,
1046                 .read_data      = idealtek_read_data,
1047         },
1048 #endif
1049
1050 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
1051         [DEVTYPE_GENERAL_TOUCH] = {
1052                 .min_xc         = 0x0,
1053                 .max_xc         = 0x7fff,
1054                 .min_yc         = 0x0,
1055                 .max_yc         = 0x7fff,
1056                 .rept_size      = 7,
1057                 .read_data      = general_touch_read_data,
1058         },
1059 #endif
1060
1061 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
1062         [DEVTYPE_GOTOP] = {
1063                 .min_xc         = 0x0,
1064                 .max_xc         = 0x03ff,
1065                 .min_yc         = 0x0,
1066                 .max_yc         = 0x03ff,
1067                 .rept_size      = 4,
1068                 .read_data      = gotop_read_data,
1069         },
1070 #endif
1071
1072 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
1073         [DEVTYPE_JASTEC] = {
1074                 .min_xc         = 0x0,
1075                 .max_xc         = 0x0fff,
1076                 .min_yc         = 0x0,
1077                 .max_yc         = 0x0fff,
1078                 .rept_size      = 4,
1079                 .read_data      = jastec_read_data,
1080         },
1081 #endif
1082
1083 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
1084         [DEVTYPE_E2I] = {
1085                 .min_xc         = 0x0,
1086                 .max_xc         = 0x7fff,
1087                 .min_yc         = 0x0,
1088                 .max_yc         = 0x7fff,
1089                 .rept_size      = 6,
1090                 .init           = e2i_init,
1091                 .read_data      = e2i_read_data,
1092         },
1093 #endif
1094
1095 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
1096         [DEVTYPE_ZYTRONIC] = {
1097                 .min_xc         = 0x0,
1098                 .max_xc         = 0x03ff,
1099                 .min_yc         = 0x0,
1100                 .max_yc         = 0x03ff,
1101                 .rept_size      = 5,
1102                 .read_data      = zytronic_read_data,
1103                 .irq_always     = true,
1104         },
1105 #endif
1106
1107 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC5UH
1108         [DEVTYPE_TC5UH] = {
1109                 .min_xc         = 0x0,
1110                 .max_xc         = 0x0fff,
1111                 .min_yc         = 0x0,
1112                 .max_yc         = 0x0fff,
1113                 .rept_size      = 5,
1114                 .read_data      = tc5uh_read_data,
1115         },
1116 #endif
1117
1118 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
1119         [DEVTYPE_NEXIO] = {
1120                 .rept_size      = 1024,
1121                 .irq_always     = true,
1122                 .read_data      = nexio_read_data,
1123                 .init           = nexio_init,
1124                 .exit           = nexio_exit,
1125         },
1126 #endif
1127 };
1128
1129
1130 /*****************************************************************************
1131  * Generic Part
1132  */
1133 static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
1134                                  unsigned char *pkt, int len)
1135 {
1136         struct usbtouch_device_info *type = usbtouch->type;
1137
1138         if (!type->read_data(usbtouch, pkt))
1139                         return;
1140
1141         input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch);
1142
1143         if (swap_xy) {
1144                 input_report_abs(usbtouch->input, ABS_X, usbtouch->y);
1145                 input_report_abs(usbtouch->input, ABS_Y, usbtouch->x);
1146         } else {
1147                 input_report_abs(usbtouch->input, ABS_X, usbtouch->x);
1148                 input_report_abs(usbtouch->input, ABS_Y, usbtouch->y);
1149         }
1150         if (type->max_press)
1151                 input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press);
1152         input_sync(usbtouch->input);
1153 }
1154
1155
1156 #ifdef MULTI_PACKET
1157 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1158                                    unsigned char *pkt, int len)
1159 {
1160         unsigned char *buffer;
1161         int pkt_len, pos, buf_len, tmp;
1162
1163         /* process buffer */
1164         if (unlikely(usbtouch->buf_len)) {
1165                 /* try to get size */
1166                 pkt_len = usbtouch->type->get_pkt_len(
1167                                 usbtouch->buffer, usbtouch->buf_len);
1168
1169                 /* drop? */
1170                 if (unlikely(!pkt_len))
1171                         goto out_flush_buf;
1172
1173                 /* need to append -pkt_len bytes before able to get size */
1174                 if (unlikely(pkt_len < 0)) {
1175                         int append = -pkt_len;
1176                         if (unlikely(append > len))
1177                                append = len;
1178                         if (usbtouch->buf_len + append >= usbtouch->type->rept_size)
1179                                 goto out_flush_buf;
1180                         memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append);
1181                         usbtouch->buf_len += append;
1182
1183                         pkt_len = usbtouch->type->get_pkt_len(
1184                                         usbtouch->buffer, usbtouch->buf_len);
1185                         if (pkt_len < 0)
1186                                 return;
1187                 }
1188
1189                 /* append */
1190                 tmp = pkt_len - usbtouch->buf_len;
1191                 if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size)
1192                         goto out_flush_buf;
1193                 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp);
1194                 usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len);
1195
1196                 buffer = pkt + tmp;
1197                 buf_len = len - tmp;
1198         } else {
1199                 buffer = pkt;
1200                 buf_len = len;
1201         }
1202
1203         /* loop over the received packet, process */
1204         pos = 0;
1205         while (pos < buf_len) {
1206                 /* get packet len */
1207                 pkt_len = usbtouch->type->get_pkt_len(buffer + pos,
1208                                                         buf_len - pos);
1209
1210                 /* unknown packet: skip one byte */
1211                 if (unlikely(!pkt_len)) {
1212                         pos++;
1213                         continue;
1214                 }
1215
1216                 /* full packet: process */
1217                 if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) {
1218                         usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len);
1219                 } else {
1220                         /* incomplete packet: save in buffer */
1221                         memcpy(usbtouch->buffer, buffer + pos, buf_len - pos);
1222                         usbtouch->buf_len = buf_len - pos;
1223                         return;
1224                 }
1225                 pos += pkt_len;
1226         }
1227
1228 out_flush_buf:
1229         usbtouch->buf_len = 0;
1230         return;
1231 }
1232 #endif
1233
1234
1235 static void usbtouch_irq(struct urb *urb)
1236 {
1237         struct usbtouch_usb *usbtouch = urb->context;
1238         int retval;
1239
1240         switch (urb->status) {
1241         case 0:
1242                 /* success */
1243                 break;
1244         case -ETIME:
1245                 /* this urb is timing out */
1246                 dbg("%s - urb timed out - was the device unplugged?",
1247                     __func__);
1248                 return;
1249         case -ECONNRESET:
1250         case -ENOENT:
1251         case -ESHUTDOWN:
1252         case -EPIPE:
1253                 /* this urb is terminated, clean up */
1254                 dbg("%s - urb shutting down with status: %d",
1255                     __func__, urb->status);
1256                 return;
1257         default:
1258                 dbg("%s - nonzero urb status received: %d",
1259                     __func__, urb->status);
1260                 goto exit;
1261         }
1262
1263         usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length);
1264
1265 exit:
1266         retval = usb_submit_urb(urb, GFP_ATOMIC);
1267         if (retval)
1268                 err("%s - usb_submit_urb failed with result: %d",
1269                     __func__, retval);
1270 }
1271
1272 static int usbtouch_open(struct input_dev *input)
1273 {
1274         struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1275
1276         usbtouch->irq->dev = interface_to_usbdev(usbtouch->interface);
1277
1278         if (!usbtouch->type->irq_always) {
1279                 if (usb_submit_urb(usbtouch->irq, GFP_KERNEL))
1280                   return -EIO;
1281         }
1282
1283         return 0;
1284 }
1285
1286 static void usbtouch_close(struct input_dev *input)
1287 {
1288         struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1289
1290         if (!usbtouch->type->irq_always)
1291                 usb_kill_urb(usbtouch->irq);
1292 }
1293
1294
1295 static void usbtouch_free_buffers(struct usb_device *udev,
1296                                   struct usbtouch_usb *usbtouch)
1297 {
1298         usb_free_coherent(udev, usbtouch->type->rept_size,
1299                           usbtouch->data, usbtouch->data_dma);
1300         kfree(usbtouch->buffer);
1301 }
1302
1303 static struct usb_endpoint_descriptor *
1304 usbtouch_get_input_endpoint(struct usb_host_interface *interface)
1305 {
1306         int i;
1307
1308         for (i = 0; i < interface->desc.bNumEndpoints; i++)
1309                 if (usb_endpoint_dir_in(&interface->endpoint[i].desc))
1310                         return &interface->endpoint[i].desc;
1311
1312         return NULL;
1313 }
1314
1315 static int usbtouch_probe(struct usb_interface *intf,
1316                           const struct usb_device_id *id)
1317 {
1318         struct usbtouch_usb *usbtouch;
1319         struct input_dev *input_dev;
1320         struct usb_endpoint_descriptor *endpoint;
1321         struct usb_device *udev = interface_to_usbdev(intf);
1322         struct usbtouch_device_info *type;
1323         int err = -ENOMEM;
1324
1325         /* some devices are ignored */
1326         if (id->driver_info == DEVTYPE_IGNORE)
1327                 return -ENODEV;
1328
1329         endpoint = usbtouch_get_input_endpoint(intf->cur_altsetting);
1330         if (!endpoint)
1331                 return -ENXIO;
1332
1333         usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL);
1334         input_dev = input_allocate_device();
1335         if (!usbtouch || !input_dev)
1336                 goto out_free;
1337
1338         type = &usbtouch_dev_info[id->driver_info];
1339         usbtouch->type = type;
1340         if (!type->process_pkt)
1341                 type->process_pkt = usbtouch_process_pkt;
1342
1343         usbtouch->data = usb_alloc_coherent(udev, type->rept_size,
1344                                             GFP_KERNEL, &usbtouch->data_dma);
1345         if (!usbtouch->data)
1346                 goto out_free;
1347
1348         if (type->get_pkt_len) {
1349                 usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL);
1350                 if (!usbtouch->buffer)
1351                         goto out_free_buffers;
1352         }
1353
1354         usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
1355         if (!usbtouch->irq) {
1356                 dbg("%s - usb_alloc_urb failed: usbtouch->irq", __func__);
1357                 goto out_free_buffers;
1358         }
1359
1360         usbtouch->interface = intf;
1361         usbtouch->input = input_dev;
1362
1363         if (udev->manufacturer)
1364                 strlcpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name));
1365
1366         if (udev->product) {
1367                 if (udev->manufacturer)
1368                         strlcat(usbtouch->name, " ", sizeof(usbtouch->name));
1369                 strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name));
1370         }
1371
1372         if (!strlen(usbtouch->name))
1373                 snprintf(usbtouch->name, sizeof(usbtouch->name),
1374                         "USB Touchscreen %04x:%04x",
1375                          le16_to_cpu(udev->descriptor.idVendor),
1376                          le16_to_cpu(udev->descriptor.idProduct));
1377
1378         usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys));
1379         strlcat(usbtouch->phys, "/input0", sizeof(usbtouch->phys));
1380
1381         input_dev->name = usbtouch->name;
1382         input_dev->phys = usbtouch->phys;
1383         usb_to_input_id(udev, &input_dev->id);
1384         input_dev->dev.parent = &intf->dev;
1385
1386         input_set_drvdata(input_dev, usbtouch);
1387
1388         input_dev->open = usbtouch_open;
1389         input_dev->close = usbtouch_close;
1390
1391         input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
1392         input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
1393         input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0);
1394         input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0);
1395         if (type->max_press)
1396                 input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press,
1397                                      type->max_press, 0, 0);
1398
1399         if (usb_endpoint_type(endpoint) == USB_ENDPOINT_XFER_INT)
1400                 usb_fill_int_urb(usbtouch->irq, udev,
1401                          usb_rcvintpipe(udev, endpoint->bEndpointAddress),
1402                          usbtouch->data, type->rept_size,
1403                          usbtouch_irq, usbtouch, endpoint->bInterval);
1404         else
1405                 usb_fill_bulk_urb(usbtouch->irq, udev,
1406                          usb_rcvbulkpipe(udev, endpoint->bEndpointAddress),
1407                          usbtouch->data, type->rept_size,
1408                          usbtouch_irq, usbtouch);
1409
1410         usbtouch->irq->dev = udev;
1411         usbtouch->irq->transfer_dma = usbtouch->data_dma;
1412         usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1413
1414         /* device specific init */
1415         if (type->init) {
1416                 err = type->init(usbtouch);
1417                 if (err) {
1418                         dbg("%s - type->init() failed, err: %d", __func__, err);
1419                         goto out_free_urb;
1420                 }
1421         }
1422
1423         err = input_register_device(usbtouch->input);
1424         if (err) {
1425                 dbg("%s - input_register_device failed, err: %d", __func__, err);
1426                 goto out_do_exit;
1427         }
1428
1429         usb_set_intfdata(intf, usbtouch);
1430
1431         if (usbtouch->type->irq_always) {
1432                 err = usb_submit_urb(usbtouch->irq, GFP_KERNEL);
1433                 if (err) {
1434                         err("%s - usb_submit_urb failed with result: %d",
1435                             __func__, err);
1436                         goto out_unregister_input;
1437                 }
1438         }
1439
1440         return 0;
1441
1442 out_unregister_input:
1443         input_unregister_device(input_dev);
1444         input_dev = NULL;
1445 out_do_exit:
1446         if (type->exit)
1447                 type->exit(usbtouch);
1448 out_free_urb:
1449         usb_free_urb(usbtouch->irq);
1450 out_free_buffers:
1451         usbtouch_free_buffers(udev, usbtouch);
1452 out_free:
1453         input_free_device(input_dev);
1454         kfree(usbtouch);
1455         return err;
1456 }
1457
1458 static void usbtouch_disconnect(struct usb_interface *intf)
1459 {
1460         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1461
1462         dbg("%s - called", __func__);
1463
1464         if (!usbtouch)
1465                 return;
1466
1467         dbg("%s - usbtouch is initialized, cleaning up", __func__);
1468         usb_set_intfdata(intf, NULL);
1469         /* this will stop IO via close */
1470         input_unregister_device(usbtouch->input);
1471         usb_free_urb(usbtouch->irq);
1472         if (usbtouch->type->exit)
1473                 usbtouch->type->exit(usbtouch);
1474         usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch);
1475         kfree(usbtouch);
1476 }
1477
1478 MODULE_DEVICE_TABLE(usb, usbtouch_devices);
1479
1480 static struct usb_driver usbtouch_driver = {
1481         .name           = "usbtouchscreen",
1482         .probe          = usbtouch_probe,
1483         .disconnect     = usbtouch_disconnect,
1484         .id_table       = usbtouch_devices,
1485 };
1486
1487 static int __init usbtouch_init(void)
1488 {
1489         return usb_register(&usbtouch_driver);
1490 }
1491
1492 static void __exit usbtouch_cleanup(void)
1493 {
1494         usb_deregister(&usbtouch_driver);
1495 }
1496
1497 module_init(usbtouch_init);
1498 module_exit(usbtouch_cleanup);
1499
1500 MODULE_AUTHOR(DRIVER_AUTHOR);
1501 MODULE_DESCRIPTION(DRIVER_DESC);
1502 MODULE_LICENSE("GPL");
1503
1504 MODULE_ALIAS("touchkitusb");
1505 MODULE_ALIAS("itmtouch");
1506 MODULE_ALIAS("mtouchusb");