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 = kmalloc(sizeof(nexio_ack_pkt), GFP_KERNEL);
 815         if (!priv->ack_buf)
 816                 goto err_priv;
 817
 818         memcpy(priv->ack_buf, nexio_ack_pkt, sizeof(nexio_ack_pkt));
 819
 820         priv->ack = usb_alloc_urb(0, GFP_KERNEL);
 821         if (!priv->ack) {
 822                 dbg("%s - usb_alloc_urb failed: usbtouch->ack", __func__);
 823                 goto err_ack_buf;
 824         }
 825
 826         usb_fill_bulk_urb(priv->ack, dev, usb_sndbulkpipe(dev, output_ep),
 827                           priv->ack_buf, sizeof(nexio_ack_pkt),
 828                           nexio_ack_complete, usbtouch);
 829         ret = 0;
 830         goto out_buf;
 831
 832 err_ack_buf:
 833         kfree(priv->ack_buf);
 834 err_priv:
 835         kfree(priv);
 836 out_buf:
 837         kfree(buf);
 838         return ret;
 839 }
 840
 841 static void nexio_exit(struct usbtouch_usb *usbtouch)
 842 {
 843         struct nexio_priv *priv = usbtouch->priv;
 844
 845         usb_kill_urb(priv->ack);
 846         usb_free_urb(priv->ack);
 847         kfree(priv->ack_buf);
 848         kfree(priv);
 849 }
 850
 851 static int nexio_read_data(struct usbtouch_usb *usbtouch, unsigned char *pkt)
 852 {
 853         int x, y, begin_x, begin_y, end_x, end_y, w, h, ret;
 854         struct nexio_touch_packet *packet = (void *) pkt;
 855         struct nexio_priv *priv = usbtouch->priv;
 856
 857         /* got touch data? */
 858         if ((pkt[0] & 0xe0) != 0xe0)
 859                 return 0;
 860
 861         /* send ACK */
 862         ret = usb_submit_urb(priv->ack, GFP_ATOMIC);
 863
 864         if (!usbtouch->type->max_xc) {
 865                 usbtouch->type->max_xc = 2 * be16_to_cpu(packet->x_len);
 866                 input_set_abs_params(usbtouch->input, ABS_X, 0,
 867                                      2 * be16_to_cpu(packet->x_len), 0, 0);
 868                 usbtouch->type->max_yc = 2 * be16_to_cpu(packet->y_len);
 869                 input_set_abs_params(usbtouch->input, ABS_Y, 0,
 870                                      2 * be16_to_cpu(packet->y_len), 0, 0);
 871         }
 872         /*
 873          * The device reports state of IR sensors on X and Y axes.
 874          * Each byte represents "darkness" percentage (0-100) of one element.
 875          * 17" touchscreen reports only 64 x 52 bytes so the resolution is low.
 876          * This also means that there's a limited multi-touch capability but
 877          * it's disabled (and untested) here as there's no X driver for that.
 878          */
 879         begin_x = end_x = begin_y = end_y = -1;
 880         for (x = 0; x < be16_to_cpu(packet->x_len); x++) {
 881                 if (begin_x == -1 && packet->data[x] > NEXIO_THRESHOLD) {
 882                         begin_x = x;
 883                         continue;
 884                 }
 885                 if (end_x == -1 && begin_x != -1 && packet->data[x] < NEXIO_THRESHOLD) {
 886                         end_x = x - 1;
 887                         for (y = be16_to_cpu(packet->x_len);
 888                              y < be16_to_cpu(packet->data_len); y++) {
 889                                 if (begin_y == -1 && packet->data[y] > NEXIO_THRESHOLD) {
 890                                         begin_y = y - be16_to_cpu(packet->x_len);
 891                                         continue;
 892                                 }
 893                                 if (end_y == -1 &&
 894                                     begin_y != -1 && packet->data[y] < NEXIO_THRESHOLD) {
 895                                         end_y = y - 1 - be16_to_cpu(packet->x_len);
 896                                         w = end_x - begin_x;
 897                                         h = end_y - begin_y;
 898 #if 0
 899                                         /* multi-touch */
 900                                         input_report_abs(usbtouch->input,
 901                                                     ABS_MT_TOUCH_MAJOR, max(w,h));
 902                                         input_report_abs(usbtouch->input,
 903                                                     ABS_MT_TOUCH_MINOR, min(x,h));
 904                                         input_report_abs(usbtouch->input,
 905                                                     ABS_MT_POSITION_X, 2*begin_x+w);
 906                                         input_report_abs(usbtouch->input,
 907                                                     ABS_MT_POSITION_Y, 2*begin_y+h);
 908                                         input_report_abs(usbtouch->input,
 909                                                     ABS_MT_ORIENTATION, w > h);
 910                                         input_mt_sync(usbtouch->input);
 911 #endif
 912                                         /* single touch */
 913                                         usbtouch->x = 2 * begin_x + w;
 914                                         usbtouch->y = 2 * begin_y + h;
 915                                         usbtouch->touch = packet->flags & 0x01;
 916                                         begin_y = end_y = -1;
 917                                         return 1;
 918                                 }
 919                         }
 920                         begin_x = end_x = -1;
 921                 }
 922
 923         }
 924         return 0;
 925 }
 926 #endif
 927
 928
 929 /*****************************************************************************
 930  * the different device descriptors
 931  */
 932 #ifdef MULTI_PACKET
 933 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
 934                                    unsigned char *pkt, int len);
 935 #endif
 936
 937 static struct usbtouch_device_info usbtouch_dev_info[] = {
 938 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
 939         [DEVTYPE_EGALAX] = {
 940                 .min_xc         = 0x0,
 941                 .max_xc         = 0x07ff,
 942                 .min_yc         = 0x0,
 943                 .max_yc         = 0x07ff,
 944                 .rept_size      = 16,
 945                 .process_pkt    = usbtouch_process_multi,
 946                 .get_pkt_len    = egalax_get_pkt_len,
 947                 .read_data      = egalax_read_data,
 948         },
 949 #endif
 950
 951 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
 952         [DEVTYPE_PANJIT] = {
 953                 .min_xc         = 0x0,
 954                 .max_xc         = 0x0fff,
 955                 .min_yc         = 0x0,
 956                 .max_yc         = 0x0fff,
 957                 .rept_size      = 8,
 958                 .read_data      = panjit_read_data,
 959         },
 960 #endif
 961
 962 #ifdef CONFIG_TOUCHSCREEN_USB_3M
 963         [DEVTYPE_3M] = {
 964                 .min_xc         = 0x0,
 965                 .max_xc         = 0x4000,
 966                 .min_yc         = 0x0,
 967                 .max_yc         = 0x4000,
 968                 .rept_size      = 11,
 969                 .read_data      = mtouch_read_data,
 970                 .init           = mtouch_init,
 971         },
 972 #endif
 973
 974 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
 975         [DEVTYPE_ITM] = {
 976                 .min_xc         = 0x0,
 977                 .max_xc         = 0x0fff,
 978                 .min_yc         = 0x0,
 979                 .max_yc         = 0x0fff,
 980                 .max_press      = 0xff,
 981                 .rept_size      = 8,
 982                 .read_data      = itm_read_data,
 983         },
 984 #endif
 985
 986 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
 987         [DEVTYPE_ETURBO] = {
 988                 .min_xc         = 0x0,
 989                 .max_xc         = 0x07ff,
 990                 .min_yc         = 0x0,
 991                 .max_yc         = 0x07ff,
 992                 .rept_size      = 8,
 993                 .process_pkt    = usbtouch_process_multi,
 994                 .get_pkt_len    = eturbo_get_pkt_len,
 995                 .read_data      = eturbo_read_data,
 996         },
 997 #endif
 998
 999 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
1000         [DEVTYPE_GUNZE] = {
1001                 .min_xc         = 0x0,
1002                 .max_xc         = 0x0fff,
1003                 .min_yc         = 0x0,
1004                 .max_yc         = 0x0fff,
1005                 .rept_size      = 4,
1006                 .read_data      = gunze_read_data,
1007         },
1008 #endif
1009
1010 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
1011         [DEVTYPE_DMC_TSC10] = {
1012                 .min_xc         = 0x0,
1013                 .max_xc         = 0x03ff,
1014                 .min_yc         = 0x0,
1015                 .max_yc         = 0x03ff,
1016                 .rept_size      = 5,
1017                 .init           = dmc_tsc10_init,
1018                 .read_data      = dmc_tsc10_read_data,
1019         },
1020 #endif
1021
1022 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
1023         [DEVTYPE_IRTOUCH] = {
1024                 .min_xc         = 0x0,
1025                 .max_xc         = 0x0fff,
1026                 .min_yc         = 0x0,
1027                 .max_yc         = 0x0fff,
1028                 .rept_size      = 8,
1029                 .read_data      = irtouch_read_data,
1030         },
1031 #endif
1032
1033 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
1034         [DEVTYPE_IDEALTEK] = {
1035                 .min_xc         = 0x0,
1036                 .max_xc         = 0x0fff,
1037                 .min_yc         = 0x0,
1038                 .max_yc         = 0x0fff,
1039                 .rept_size      = 8,
1040                 .process_pkt    = usbtouch_process_multi,
1041                 .get_pkt_len    = idealtek_get_pkt_len,
1042                 .read_data      = idealtek_read_data,
1043         },
1044 #endif
1045
1046 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
1047         [DEVTYPE_GENERAL_TOUCH] = {
1048                 .min_xc         = 0x0,
1049                 .max_xc         = 0x7fff,
1050                 .min_yc         = 0x0,
1051                 .max_yc         = 0x7fff,
1052                 .rept_size      = 7,
1053                 .read_data      = general_touch_read_data,
1054         },
1055 #endif
1056
1057 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
1058         [DEVTYPE_GOTOP] = {
1059                 .min_xc         = 0x0,
1060                 .max_xc         = 0x03ff,
1061                 .min_yc         = 0x0,
1062                 .max_yc         = 0x03ff,
1063                 .rept_size      = 4,
1064                 .read_data      = gotop_read_data,
1065         },
1066 #endif
1067
1068 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
1069         [DEVTYPE_JASTEC] = {
1070                 .min_xc         = 0x0,
1071                 .max_xc         = 0x0fff,
1072                 .min_yc         = 0x0,
1073                 .max_yc         = 0x0fff,
1074                 .rept_size      = 4,
1075                 .read_data      = jastec_read_data,
1076         },
1077 #endif
1078
1079 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
1080         [DEVTYPE_E2I] = {
1081                 .min_xc         = 0x0,
1082                 .max_xc         = 0x7fff,
1083                 .min_yc         = 0x0,
1084                 .max_yc         = 0x7fff,
1085                 .rept_size      = 6,
1086                 .init           = e2i_init,
1087                 .read_data      = e2i_read_data,
1088         },
1089 #endif
1090
1091 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
1092         [DEVTYPE_ZYTRONIC] = {
1093                 .min_xc         = 0x0,
1094                 .max_xc         = 0x03ff,
1095                 .min_yc         = 0x0,
1096                 .max_yc         = 0x03ff,
1097                 .rept_size      = 5,
1098                 .read_data      = zytronic_read_data,
1099                 .irq_always     = true,
1100         },
1101 #endif
1102
1103 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC5UH
1104         [DEVTYPE_TC5UH] = {
1105                 .min_xc         = 0x0,
1106                 .max_xc         = 0x0fff,
1107                 .min_yc         = 0x0,
1108                 .max_yc         = 0x0fff,
1109                 .rept_size      = 5,
1110                 .read_data      = tc5uh_read_data,
1111         },
1112 #endif
1113
1114 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
1115         [DEVTYPE_NEXIO] = {
1116                 .rept_size      = 128,
1117                 .irq_always     = true,
1118                 .read_data      = nexio_read_data,
1119                 .init           = nexio_init,
1120                 .exit           = nexio_exit,
1121         },
1122 #endif
1123 };
1124
1125
1126 /*****************************************************************************
1127  * Generic Part
1128  */
1129 static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
1130                                  unsigned char *pkt, int len)
1131 {
1132         struct usbtouch_device_info *type = usbtouch->type;
1133
1134         if (!type->read_data(usbtouch, pkt))
1135                         return;
1136
1137         input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch);
1138
1139         if (swap_xy) {
1140                 input_report_abs(usbtouch->input, ABS_X, usbtouch->y);
1141                 input_report_abs(usbtouch->input, ABS_Y, usbtouch->x);
1142         } else {
1143                 input_report_abs(usbtouch->input, ABS_X, usbtouch->x);
1144                 input_report_abs(usbtouch->input, ABS_Y, usbtouch->y);
1145         }
1146         if (type->max_press)
1147                 input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press);
1148         input_sync(usbtouch->input);
1149 }
1150
1151
1152 #ifdef MULTI_PACKET
1153 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1154                                    unsigned char *pkt, int len)
1155 {
1156         unsigned char *buffer;
1157         int pkt_len, pos, buf_len, tmp;
1158
1159         /* process buffer */
1160         if (unlikely(usbtouch->buf_len)) {
1161                 /* try to get size */
1162                 pkt_len = usbtouch->type->get_pkt_len(
1163                                 usbtouch->buffer, usbtouch->buf_len);
1164
1165                 /* drop? */
1166                 if (unlikely(!pkt_len))
1167                         goto out_flush_buf;
1168
1169                 /* need to append -pkt_len bytes before able to get size */
1170                 if (unlikely(pkt_len < 0)) {
1171                         int append = -pkt_len;
1172                         if (unlikely(append > len))
1173                                append = len;
1174                         if (usbtouch->buf_len + append >= usbtouch->type->rept_size)
1175                                 goto out_flush_buf;
1176                         memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append);
1177                         usbtouch->buf_len += append;
1178
1179                         pkt_len = usbtouch->type->get_pkt_len(
1180                                         usbtouch->buffer, usbtouch->buf_len);
1181                         if (pkt_len < 0)
1182                                 return;
1183                 }
1184
1185                 /* append */
1186                 tmp = pkt_len - usbtouch->buf_len;
1187                 if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size)
1188                         goto out_flush_buf;
1189                 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp);
1190                 usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len);
1191
1192                 buffer = pkt + tmp;
1193                 buf_len = len - tmp;
1194         } else {
1195                 buffer = pkt;
1196                 buf_len = len;
1197         }
1198
1199         /* loop over the received packet, process */
1200         pos = 0;
1201         while (pos < buf_len) {
1202                 /* get packet len */
1203                 pkt_len = usbtouch->type->get_pkt_len(buffer + pos,
1204                                                         buf_len - pos);
1205
1206                 /* unknown packet: skip one byte */
1207                 if (unlikely(!pkt_len)) {
1208                         pos++;
1209                         continue;
1210                 }
1211
1212                 /* full packet: process */
1213                 if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) {
1214                         usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len);
1215                 } else {
1216                         /* incomplete packet: save in buffer */
1217                         memcpy(usbtouch->buffer, buffer + pos, buf_len - pos);
1218                         usbtouch->buf_len = buf_len - pos;
1219                         return;
1220                 }
1221                 pos += pkt_len;
1222         }
1223
1224 out_flush_buf:
1225         usbtouch->buf_len = 0;
1226         return;
1227 }
1228 #endif
1229
1230
1231 static void usbtouch_irq(struct urb *urb)
1232 {
1233         struct usbtouch_usb *usbtouch = urb->context;
1234         int retval;
1235
1236         switch (urb->status) {
1237         case 0:
1238                 /* success */
1239                 break;
1240         case -ETIME:
1241                 /* this urb is timing out */
1242                 dbg("%s - urb timed out - was the device unplugged?",
1243                     __func__);
1244                 return;
1245         case -ECONNRESET:
1246         case -ENOENT:
1247         case -ESHUTDOWN:
1248         case -EPIPE:
1249                 /* this urb is terminated, clean up */
1250                 dbg("%s - urb shutting down with status: %d",
1251                     __func__, urb->status);
1252                 return;
1253         default:
1254                 dbg("%s - nonzero urb status received: %d",
1255                     __func__, urb->status);
1256                 goto exit;
1257         }
1258
1259         usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length);
1260
1261 exit:
1262         retval = usb_submit_urb(urb, GFP_ATOMIC);
1263         if (retval)
1264                 err("%s - usb_submit_urb failed with result: %d",
1265                     __func__, retval);
1266 }
1267
1268 static int usbtouch_open(struct input_dev *input)
1269 {
1270         struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1271
1272         usbtouch->irq->dev = interface_to_usbdev(usbtouch->interface);
1273
1274         if (!usbtouch->type->irq_always) {
1275                 if (usb_submit_urb(usbtouch->irq, GFP_KERNEL))
1276                   return -EIO;
1277         }
1278
1279         return 0;
1280 }
1281
1282 static void usbtouch_close(struct input_dev *input)
1283 {
1284         struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1285
1286         if (!usbtouch->type->irq_always)
1287                 usb_kill_urb(usbtouch->irq);
1288 }
1289
1290
1291 static void usbtouch_free_buffers(struct usb_device *udev,
1292                                   struct usbtouch_usb *usbtouch)
1293 {
1294         usb_free_coherent(udev, usbtouch->type->rept_size,
1295                           usbtouch->data, usbtouch->data_dma);
1296         kfree(usbtouch->buffer);
1297 }
1298
1299 static struct usb_endpoint_descriptor *
1300 usbtouch_get_input_endpoint(struct usb_host_interface *interface)
1301 {
1302         int i;
1303
1304         for (i = 0; i < interface->desc.bNumEndpoints; i++)
1305                 if (usb_endpoint_dir_in(&interface->endpoint[i].desc))
1306                         return &interface->endpoint[i].desc;
1307
1308         return NULL;
1309 }
1310
1311 static int usbtouch_probe(struct usb_interface *intf,
1312                           const struct usb_device_id *id)
1313 {
1314         struct usbtouch_usb *usbtouch;
1315         struct input_dev *input_dev;
1316         struct usb_endpoint_descriptor *endpoint;
1317         struct usb_device *udev = interface_to_usbdev(intf);
1318         struct usbtouch_device_info *type;
1319         int err = -ENOMEM;
1320
1321         /* some devices are ignored */
1322         if (id->driver_info == DEVTYPE_IGNORE)
1323                 return -ENODEV;
1324
1325         endpoint = usbtouch_get_input_endpoint(intf->cur_altsetting);
1326         if (!endpoint)
1327                 return -ENXIO;
1328
1329         usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL);
1330         input_dev = input_allocate_device();
1331         if (!usbtouch || !input_dev)
1332                 goto out_free;
1333
1334         type = &usbtouch_dev_info[id->driver_info];
1335         usbtouch->type = type;
1336         if (!type->process_pkt)
1337                 type->process_pkt = usbtouch_process_pkt;
1338
1339         usbtouch->data = usb_alloc_coherent(udev, type->rept_size,
1340                                             GFP_KERNEL, &usbtouch->data_dma);
1341         if (!usbtouch->data)
1342                 goto out_free;
1343
1344         if (type->get_pkt_len) {
1345                 usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL);
1346                 if (!usbtouch->buffer)
1347                         goto out_free_buffers;
1348         }
1349
1350         usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
1351         if (!usbtouch->irq) {
1352                 dbg("%s - usb_alloc_urb failed: usbtouch->irq", __func__);
1353                 goto out_free_buffers;
1354         }
1355
1356         usbtouch->interface = intf;
1357         usbtouch->input = input_dev;
1358
1359         if (udev->manufacturer)
1360                 strlcpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name));
1361
1362         if (udev->product) {
1363                 if (udev->manufacturer)
1364                         strlcat(usbtouch->name, " ", sizeof(usbtouch->name));
1365                 strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name));
1366         }
1367
1368         if (!strlen(usbtouch->name))
1369                 snprintf(usbtouch->name, sizeof(usbtouch->name),
1370                         "USB Touchscreen %04x:%04x",
1371                          le16_to_cpu(udev->descriptor.idVendor),
1372                          le16_to_cpu(udev->descriptor.idProduct));
1373
1374         usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys));
1375         strlcat(usbtouch->phys, "/input0", sizeof(usbtouch->phys));
1376
1377         input_dev->name = usbtouch->name;
1378         input_dev->phys = usbtouch->phys;
1379         usb_to_input_id(udev, &input_dev->id);
1380         input_dev->dev.parent = &intf->dev;
1381
1382         input_set_drvdata(input_dev, usbtouch);
1383
1384         input_dev->open = usbtouch_open;
1385         input_dev->close = usbtouch_close;
1386
1387         input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
1388         input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
1389         input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0);
1390         input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0);
1391         if (type->max_press)
1392                 input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press,
1393                                      type->max_press, 0, 0);
1394
1395         if (usb_endpoint_type(endpoint) == USB_ENDPOINT_XFER_INT)
1396                 usb_fill_int_urb(usbtouch->irq, udev,
1397                          usb_rcvintpipe(udev, endpoint->bEndpointAddress),
1398                          usbtouch->data, type->rept_size,
1399                          usbtouch_irq, usbtouch, endpoint->bInterval);
1400         else
1401                 usb_fill_bulk_urb(usbtouch->irq, udev,
1402                          usb_rcvbulkpipe(udev, endpoint->bEndpointAddress),
1403                          usbtouch->data, type->rept_size,
1404                          usbtouch_irq, usbtouch);
1405
1406         usbtouch->irq->dev = udev;
1407         usbtouch->irq->transfer_dma = usbtouch->data_dma;
1408         usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1409
1410         /* device specific init */
1411         if (type->init) {
1412                 err = type->init(usbtouch);
1413                 if (err) {
1414                         dbg("%s - type->init() failed, err: %d", __func__, err);
1415                         goto out_free_urb;
1416                 }
1417         }
1418
1419         err = input_register_device(usbtouch->input);
1420         if (err) {
1421                 dbg("%s - input_register_device failed, err: %d", __func__, err);
1422                 goto out_do_exit;
1423         }
1424
1425         usb_set_intfdata(intf, usbtouch);
1426
1427         if (usbtouch->type->irq_always) {
1428                 err = usb_submit_urb(usbtouch->irq, GFP_KERNEL);
1429                 if (err) {
1430                         err("%s - usb_submit_urb failed with result: %d",
1431                             __func__, err);
1432                         goto out_unregister_input;
1433                 }
1434         }
1435
1436         return 0;
1437
1438 out_unregister_input:
1439         input_unregister_device(input_dev);
1440         input_dev = NULL;
1441 out_do_exit:
1442         if (type->exit)
1443                 type->exit(usbtouch);
1444 out_free_urb:
1445         usb_free_urb(usbtouch->irq);
1446 out_free_buffers:
1447         usbtouch_free_buffers(udev, usbtouch);
1448 out_free:
1449         input_free_device(input_dev);
1450         kfree(usbtouch);
1451         return err;
1452 }
1453
1454 static void usbtouch_disconnect(struct usb_interface *intf)
1455 {
1456         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1457
1458         dbg("%s - called", __func__);
1459
1460         if (!usbtouch)
1461                 return;
1462
1463         dbg("%s - usbtouch is initialized, cleaning up", __func__);
1464         usb_set_intfdata(intf, NULL);
1465         /* this will stop IO via close */
1466         input_unregister_device(usbtouch->input);
1467         usb_free_urb(usbtouch->irq);
1468         if (usbtouch->type->exit)
1469                 usbtouch->type->exit(usbtouch);
1470         usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch);
1471         kfree(usbtouch);
1472 }
1473
1474 MODULE_DEVICE_TABLE(usb, usbtouch_devices);
1475
1476 static struct usb_driver usbtouch_driver = {
1477         .name           = "usbtouchscreen",
1478         .probe          = usbtouch_probe,
1479         .disconnect     = usbtouch_disconnect,
1480         .id_table       = usbtouch_devices,
1481 };
1482
1483 static int __init usbtouch_init(void)
1484 {
1485         return usb_register(&usbtouch_driver);
1486 }
1487
1488 static void __exit usbtouch_cleanup(void)
1489 {
1490         usb_deregister(&usbtouch_driver);
1491 }
1492
1493 module_init(usbtouch_init);
1494 module_exit(usbtouch_cleanup);
1495
1496 MODULE_AUTHOR(DRIVER_AUTHOR);
1497 MODULE_DESCRIPTION(DRIVER_DESC);
1498 MODULE_LICENSE("GPL");
1499
1500 MODULE_ALIAS("touchkitusb");
1501 MODULE_ALIAS("itmtouch");
1502 MODULE_ALIAS("mtouchusb");