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  *
  17  * Copyright (C) 2004-2007 by Daniel Ritz <daniel.ritz@gmx.ch>
  18  * Copyright (C) by Todd E. Johnson (mtouchusb.c)
  19  *
  20  * This program is free software; you can redistribute it and/or
  21  * modify it under the terms of the GNU General Public License as
  22  * published by the Free Software Foundation; either version 2 of the
  23  * License, or (at your option) any later version.
  24  *
  25  * This program is distributed in the hope that it will be useful, but
  26  * WITHOUT ANY WARRANTY; without even the implied warranty of
  27  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  28  * General Public License for more details.
  29  *
  30  * You should have received a copy of the GNU General Public License
  31  * along with this program; if not, write to the Free Software
  32  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  33  *
  34  * Driver is based on touchkitusb.c
  35  * - ITM parts are from itmtouch.c
  36  * - 3M parts are from mtouchusb.c
  37  * - PanJit parts are from an unmerged driver by Lanslott Gish
  38  * - DMC TSC 10/25 are from Holger Schurig, with ideas from an unmerged
  39  *   driver from Marius Vollmer
  40  *
  41  *****************************************************************************/
  42
  43 //#define DEBUG
  44
  45 #include <linux/kernel.h>
  46 #include <linux/slab.h>
  47 #include <linux/input.h>
  48 #include <linux/module.h>
  49 #include <linux/init.h>
  50 #include <linux/usb.h>
  51 #include <linux/usb/input.h>
  52
  53
  54 #define DRIVER_VERSION          "v0.6"
  55 #define DRIVER_AUTHOR           "Daniel Ritz <daniel.ritz@gmx.ch>"
  56 #define DRIVER_DESC             "USB Touchscreen Driver"
  57
  58 static int swap_xy;
  59 module_param(swap_xy, bool, 0644);
  60 MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");
  61
  62 /* device specifc data/functions */
  63 struct usbtouch_usb;
  64 struct usbtouch_device_info {
  65         int min_xc, max_xc;
  66         int min_yc, max_yc;
  67         int min_press, max_press;
  68         int rept_size;
  69
  70         void (*process_pkt) (struct usbtouch_usb *usbtouch, unsigned char *pkt, int len);
  71
  72         /*
  73          * used to get the packet len. possible return values:
  74          * > 0: packet len
  75          * = 0: skip one byte
  76          * < 0: -return value more bytes needed
  77          */
  78         int  (*get_pkt_len) (unsigned char *pkt, int len);
  79
  80         int  (*read_data)   (struct usbtouch_usb *usbtouch, unsigned char *pkt);
  81         int  (*init)        (struct usbtouch_usb *usbtouch);
  82 };
  83
  84 /* a usbtouch device */
  85 struct usbtouch_usb {
  86         unsigned char *data;
  87         dma_addr_t data_dma;
  88         unsigned char *buffer;
  89         int buf_len;
  90         struct urb *irq;
  91         struct usb_device *udev;
  92         struct input_dev *input;
  93         struct usbtouch_device_info *type;
  94         char name[128];
  95         char phys[64];
  96
  97         int x, y;
  98         int touch, press;
  99 };
 100
 101
 102 /* device types */
 103 enum {
 104         DEVTPYE_DUMMY = -1,
 105         DEVTYPE_EGALAX,
 106         DEVTYPE_PANJIT,
 107         DEVTYPE_3M,
 108         DEVTYPE_ITM,
 109         DEVTYPE_ETURBO,
 110         DEVTYPE_GUNZE,
 111         DEVTYPE_DMC_TSC10,
 112         DEVTYPE_IRTOUCH,
 113         DEVTYPE_IDEALTEK,
 114         DEVTYPE_GENERAL_TOUCH,
 115         DEVTYPE_GOTOP,
 116 };
 117
 118 static struct usb_device_id usbtouch_devices[] = {
 119 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
 120         {USB_DEVICE(0x3823, 0x0001), .driver_info = DEVTYPE_EGALAX},
 121         {USB_DEVICE(0x3823, 0x0002), .driver_info = DEVTYPE_EGALAX},
 122         {USB_DEVICE(0x0123, 0x0001), .driver_info = DEVTYPE_EGALAX},
 123         {USB_DEVICE(0x0eef, 0x0001), .driver_info = DEVTYPE_EGALAX},
 124         {USB_DEVICE(0x0eef, 0x0002), .driver_info = DEVTYPE_EGALAX},
 125         {USB_DEVICE(0x1234, 0x0001), .driver_info = DEVTYPE_EGALAX},
 126         {USB_DEVICE(0x1234, 0x0002), .driver_info = DEVTYPE_EGALAX},
 127 #endif
 128
 129 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
 130         {USB_DEVICE(0x134c, 0x0001), .driver_info = DEVTYPE_PANJIT},
 131         {USB_DEVICE(0x134c, 0x0002), .driver_info = DEVTYPE_PANJIT},
 132         {USB_DEVICE(0x134c, 0x0003), .driver_info = DEVTYPE_PANJIT},
 133         {USB_DEVICE(0x134c, 0x0004), .driver_info = DEVTYPE_PANJIT},
 134 #endif
 135
 136 #ifdef CONFIG_TOUCHSCREEN_USB_3M
 137         {USB_DEVICE(0x0596, 0x0001), .driver_info = DEVTYPE_3M},
 138 #endif
 139
 140 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
 141         {USB_DEVICE(0x0403, 0xf9e9), .driver_info = DEVTYPE_ITM},
 142 #endif
 143
 144 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
 145         {USB_DEVICE(0x1234, 0x5678), .driver_info = DEVTYPE_ETURBO},
 146 #endif
 147
 148 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
 149         {USB_DEVICE(0x0637, 0x0001), .driver_info = DEVTYPE_GUNZE},
 150 #endif
 151
 152 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
 153         {USB_DEVICE(0x0afa, 0x03e8), .driver_info = DEVTYPE_DMC_TSC10},
 154 #endif
 155
 156 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
 157         {USB_DEVICE(0x595a, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
 158         {USB_DEVICE(0x6615, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
 159 #endif
 160
 161 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
 162         {USB_DEVICE(0x1391, 0x1000), .driver_info = DEVTYPE_IDEALTEK},
 163 #endif
 164
 165 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
 166         {USB_DEVICE(0x0dfc, 0x0001), .driver_info = DEVTYPE_GENERAL_TOUCH},
 167 #endif
 168
 169 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
 170         {USB_DEVICE(0x08f2, 0x007f), .driver_info = DEVTYPE_GOTOP},
 171         {USB_DEVICE(0x08f2, 0x00ce), .driver_info = DEVTYPE_GOTOP},
 172         {USB_DEVICE(0x08f2, 0x00f4), .driver_info = DEVTYPE_GOTOP},
 173 #endif
 174
 175         {}
 176 };
 177
 178
 179 /*****************************************************************************
 180  * eGalax part
 181  */
 182
 183 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
 184
 185 #ifndef MULTI_PACKET
 186 #define MULTI_PACKET
 187 #endif
 188
 189 #define EGALAX_PKT_TYPE_MASK            0xFE
 190 #define EGALAX_PKT_TYPE_REPT            0x80
 191 #define EGALAX_PKT_TYPE_DIAG            0x0A
 192
 193 static int egalax_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 194 {
 195         if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT)
 196                 return 0;
 197
 198         dev->x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F);
 199         dev->y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F);
 200         dev->touch = pkt[0] & 0x01;
 201
 202         return 1;
 203 }
 204
 205 static int egalax_get_pkt_len(unsigned char *buf, int len)
 206 {
 207         switch (buf[0] & EGALAX_PKT_TYPE_MASK) {
 208         case EGALAX_PKT_TYPE_REPT:
 209                 return 5;
 210
 211         case EGALAX_PKT_TYPE_DIAG:
 212                 if (len < 2)
 213                         return -1;
 214
 215                 return buf[1] + 2;
 216         }
 217
 218         return 0;
 219 }
 220 #endif
 221
 222
 223 /*****************************************************************************
 224  * PanJit Part
 225  */
 226 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
 227 static int panjit_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 228 {
 229         dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
 230         dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
 231         dev->touch = pkt[0] & 0x01;
 232
 233         return 1;
 234 }
 235 #endif
 236
 237
 238 /*****************************************************************************
 239  * 3M/Microtouch Part
 240  */
 241 #ifdef CONFIG_TOUCHSCREEN_USB_3M
 242
 243 #define MTOUCHUSB_ASYNC_REPORT          1
 244 #define MTOUCHUSB_RESET                 7
 245 #define MTOUCHUSB_REQ_CTRLLR_ID         10
 246
 247 static int mtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 248 {
 249         dev->x = (pkt[8] << 8) | pkt[7];
 250         dev->y = (pkt[10] << 8) | pkt[9];
 251         dev->touch = (pkt[2] & 0x40) ? 1 : 0;
 252
 253         return 1;
 254 }
 255
 256 static int mtouch_init(struct usbtouch_usb *usbtouch)
 257 {
 258         int ret, i;
 259
 260         ret = usb_control_msg(usbtouch->udev, usb_rcvctrlpipe(usbtouch->udev, 0),
 261                               MTOUCHUSB_RESET,
 262                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 263                               1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
 264         dbg("%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d",
 265             __FUNCTION__, ret);
 266         if (ret < 0)
 267                 return ret;
 268         msleep(150);
 269
 270         for (i = 0; i < 3; i++) {
 271                 ret = usb_control_msg(usbtouch->udev, usb_rcvctrlpipe(usbtouch->udev, 0),
 272                                       MTOUCHUSB_ASYNC_REPORT,
 273                                       USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 274                                       1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT);
 275                 dbg("%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d",
 276                     __FUNCTION__, ret);
 277                 if (ret >= 0)
 278                         break;
 279                 if (ret != -EPIPE)
 280                         return ret;
 281         }
 282
 283         return 0;
 284 }
 285 #endif
 286
 287
 288 /*****************************************************************************
 289  * ITM Part
 290  */
 291 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
 292 static int itm_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 293 {
 294         int touch;
 295         /*
 296          * ITM devices report invalid x/y data if not touched.
 297          * if the screen was touched before but is not touched any more
 298          * report touch as 0 with the last valid x/y data once. then stop
 299          * reporting data until touched again.
 300          */
 301         dev->press = ((pkt[2] & 0x01) << 7) | (pkt[5] & 0x7F);
 302
 303         touch = ~pkt[7] & 0x20;
 304         if (!touch) {
 305                 if (dev->touch) {
 306                         dev->touch = 0;
 307                         return 1;
 308                 }
 309
 310                 return 0;
 311         }
 312
 313         dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F);
 314         dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F);
 315         dev->touch = touch;
 316
 317         return 1;
 318 }
 319 #endif
 320
 321
 322 /*****************************************************************************
 323  * eTurboTouch part
 324  */
 325 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
 326 #ifndef MULTI_PACKET
 327 #define MULTI_PACKET
 328 #endif
 329 static int eturbo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 330 {
 331         unsigned int shift;
 332
 333         /* packets should start with sync */
 334         if (!(pkt[0] & 0x80))
 335                 return 0;
 336
 337         shift = (6 - (pkt[0] & 0x03));
 338         dev->x = ((pkt[3] << 7) | pkt[4]) >> shift;
 339         dev->y = ((pkt[1] << 7) | pkt[2]) >> shift;
 340         dev->touch = (pkt[0] & 0x10) ? 1 : 0;
 341
 342         return 1;
 343 }
 344
 345 static int eturbo_get_pkt_len(unsigned char *buf, int len)
 346 {
 347         if (buf[0] & 0x80)
 348                 return 5;
 349         if (buf[0] == 0x01)
 350                 return 3;
 351         return 0;
 352 }
 353 #endif
 354
 355
 356 /*****************************************************************************
 357  * Gunze part
 358  */
 359 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
 360 static int gunze_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 361 {
 362         if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80))
 363                 return 0;
 364
 365         dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F);
 366         dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F);
 367         dev->touch = pkt[0] & 0x20;
 368
 369         return 1;
 370 }
 371 #endif
 372
 373 /*****************************************************************************
 374  * DMC TSC-10/25 Part
 375  *
 376  * Documentation about the controller and it's protocol can be found at
 377  *   http://www.dmccoltd.com/files/controler/tsc10usb_pi_e.pdf
 378  *   http://www.dmccoltd.com/files/controler/tsc25_usb_e.pdf
 379  */
 380 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
 381
 382 /* supported data rates. currently using 130 */
 383 #define TSC10_RATE_POINT        0x50
 384 #define TSC10_RATE_30           0x40
 385 #define TSC10_RATE_50           0x41
 386 #define TSC10_RATE_80           0x42
 387 #define TSC10_RATE_100          0x43
 388 #define TSC10_RATE_130          0x44
 389 #define TSC10_RATE_150          0x45
 390
 391 /* commands */
 392 #define TSC10_CMD_RESET         0x55
 393 #define TSC10_CMD_RATE          0x05
 394 #define TSC10_CMD_DATA1         0x01
 395
 396 static int dmc_tsc10_init(struct usbtouch_usb *usbtouch)
 397 {
 398         struct usb_device *dev = usbtouch->udev;
 399         int ret;
 400         unsigned char buf[2];
 401
 402         /* reset */
 403         buf[0] = buf[1] = 0xFF;
 404         ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
 405                               TSC10_CMD_RESET,
 406                               USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 407                               0, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
 408         if (ret < 0)
 409                 return ret;
 410         if (buf[0] != 0x06 || buf[1] != 0x00)
 411                 return -ENODEV;
 412
 413         /* set coordinate output rate */
 414         buf[0] = buf[1] = 0xFF;
 415         ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
 416                               TSC10_CMD_RATE,
 417                               USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 418                               TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
 419         if (ret < 0)
 420                 return ret;
 421         if ((buf[0] != 0x06 || buf[1] != 0x00) &&
 422             (buf[0] != 0x15 || buf[1] != 0x01))
 423                 return -ENODEV;
 424
 425         /* start sending data */
 426         ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
 427                               TSC10_CMD_DATA1,
 428                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 429                               0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
 430         if (ret < 0)
 431                 return ret;
 432
 433         return 0;
 434 }
 435
 436
 437 static int dmc_tsc10_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 438 {
 439         dev->x = ((pkt[2] & 0x03) << 8) | pkt[1];
 440         dev->y = ((pkt[4] & 0x03) << 8) | pkt[3];
 441         dev->touch = pkt[0] & 0x01;
 442
 443         return 1;
 444 }
 445 #endif
 446
 447
 448 /*****************************************************************************
 449  * IRTOUCH Part
 450  */
 451 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
 452 static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 453 {
 454         dev->x = (pkt[3] << 8) | pkt[2];
 455         dev->y = (pkt[5] << 8) | pkt[4];
 456         dev->touch = (pkt[1] & 0x03) ? 1 : 0;
 457
 458         return 1;
 459 }
 460 #endif
 461
 462
 463 /*****************************************************************************
 464  * IdealTEK URTC1000 Part
 465  */
 466 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
 467 #ifndef MULTI_PACKET
 468 #define MULTI_PACKET
 469 #endif
 470 static int idealtek_get_pkt_len(unsigned char *buf, int len)
 471 {
 472         if (buf[0] & 0x80)
 473                 return 5;
 474         if (buf[0] == 0x01)
 475                 return len;
 476         return 0;
 477 }
 478
 479 static int idealtek_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 480 {
 481         switch (pkt[0] & 0x98) {
 482         case 0x88:
 483                 /* touch data in IdealTEK mode */
 484                 dev->x = (pkt[1] << 5) | (pkt[2] >> 2);
 485                 dev->y = (pkt[3] << 5) | (pkt[4] >> 2);
 486                 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
 487                 return 1;
 488
 489         case 0x98:
 490                 /* touch data in MT emulation mode */
 491                 dev->x = (pkt[2] << 5) | (pkt[1] >> 2);
 492                 dev->y = (pkt[4] << 5) | (pkt[3] >> 2);
 493                 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
 494                 return 1;
 495
 496         default:
 497                 return 0;
 498         }
 499 }
 500 #endif
 501
 502 /*****************************************************************************
 503  * General Touch Part
 504  */
 505 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
 506 static int general_touch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 507 {
 508         dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1] ;
 509         dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3] ;
 510         dev->press = pkt[5] & 0xff;
 511         dev->touch = pkt[0] & 0x01;
 512
 513         return 1;
 514 }
 515 #endif
 516
 517 /*****************************************************************************
 518  * GoTop Part
 519  */
 520 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
 521 static int gotop_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 522 {
 523         dev->x = ((pkt[1] & 0x38) << 4) | pkt[2];
 524         dev->y = ((pkt[1] & 0x07) << 7) | pkt[3];
 525         dev->touch = pkt[0] & 0x01;
 526         return 1;
 527 }
 528 #endif
 529
 530
 531 /*****************************************************************************
 532  * the different device descriptors
 533  */
 534 #ifdef MULTI_PACKET
 535 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
 536                                    unsigned char *pkt, int len);
 537 #endif
 538
 539 static struct usbtouch_device_info usbtouch_dev_info[] = {
 540 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
 541         [DEVTYPE_EGALAX] = {
 542                 .min_xc         = 0x0,
 543                 .max_xc         = 0x07ff,
 544                 .min_yc         = 0x0,
 545                 .max_yc         = 0x07ff,
 546                 .rept_size      = 16,
 547                 .process_pkt    = usbtouch_process_multi,
 548                 .get_pkt_len    = egalax_get_pkt_len,
 549                 .read_data      = egalax_read_data,
 550         },
 551 #endif
 552
 553 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
 554         [DEVTYPE_PANJIT] = {
 555                 .min_xc         = 0x0,
 556                 .max_xc         = 0x0fff,
 557                 .min_yc         = 0x0,
 558                 .max_yc         = 0x0fff,
 559                 .rept_size      = 8,
 560                 .read_data      = panjit_read_data,
 561         },
 562 #endif
 563
 564 #ifdef CONFIG_TOUCHSCREEN_USB_3M
 565         [DEVTYPE_3M] = {
 566                 .min_xc         = 0x0,
 567                 .max_xc         = 0x4000,
 568                 .min_yc         = 0x0,
 569                 .max_yc         = 0x4000,
 570                 .rept_size      = 11,
 571                 .read_data      = mtouch_read_data,
 572                 .init           = mtouch_init,
 573         },
 574 #endif
 575
 576 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
 577         [DEVTYPE_ITM] = {
 578                 .min_xc         = 0x0,
 579                 .max_xc         = 0x0fff,
 580                 .min_yc         = 0x0,
 581                 .max_yc         = 0x0fff,
 582                 .max_press      = 0xff,
 583                 .rept_size      = 8,
 584                 .read_data      = itm_read_data,
 585         },
 586 #endif
 587
 588 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
 589         [DEVTYPE_ETURBO] = {
 590                 .min_xc         = 0x0,
 591                 .max_xc         = 0x07ff,
 592                 .min_yc         = 0x0,
 593                 .max_yc         = 0x07ff,
 594                 .rept_size      = 8,
 595                 .process_pkt    = usbtouch_process_multi,
 596                 .get_pkt_len    = eturbo_get_pkt_len,
 597                 .read_data      = eturbo_read_data,
 598         },
 599 #endif
 600
 601 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
 602         [DEVTYPE_GUNZE] = {
 603                 .min_xc         = 0x0,
 604                 .max_xc         = 0x0fff,
 605                 .min_yc         = 0x0,
 606                 .max_yc         = 0x0fff,
 607                 .rept_size      = 4,
 608                 .read_data      = gunze_read_data,
 609         },
 610 #endif
 611
 612 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
 613         [DEVTYPE_DMC_TSC10] = {
 614                 .min_xc         = 0x0,
 615                 .max_xc         = 0x03ff,
 616                 .min_yc         = 0x0,
 617                 .max_yc         = 0x03ff,
 618                 .rept_size      = 5,
 619                 .init           = dmc_tsc10_init,
 620                 .read_data      = dmc_tsc10_read_data,
 621         },
 622 #endif
 623
 624 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
 625         [DEVTYPE_IRTOUCH] = {
 626                 .min_xc         = 0x0,
 627                 .max_xc         = 0x0fff,
 628                 .min_yc         = 0x0,
 629                 .max_yc         = 0x0fff,
 630                 .rept_size      = 8,
 631                 .read_data      = irtouch_read_data,
 632         },
 633 #endif
 634
 635 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
 636         [DEVTYPE_IDEALTEK] = {
 637                 .min_xc         = 0x0,
 638                 .max_xc         = 0x0fff,
 639                 .min_yc         = 0x0,
 640                 .max_yc         = 0x0fff,
 641                 .rept_size      = 8,
 642                 .process_pkt    = usbtouch_process_multi,
 643                 .get_pkt_len    = idealtek_get_pkt_len,
 644                 .read_data      = idealtek_read_data,
 645         },
 646 #endif
 647
 648 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
 649         [DEVTYPE_GENERAL_TOUCH] = {
 650                 .min_xc         = 0x0,
 651                 .max_xc         = 0x0500,
 652                 .min_yc         = 0x0,
 653                 .max_yc         = 0x0500,
 654                 .rept_size      = 7,
 655                 .read_data      = general_touch_read_data,
 656         },
 657 #endif
 658
 659 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
 660         [DEVTYPE_GOTOP] = {
 661                 .min_xc         = 0x0,
 662                 .max_xc         = 0x03ff,
 663                 .min_yc         = 0x0,
 664                 .max_yc         = 0x03ff,
 665                 .rept_size      = 4,
 666                 .read_data      = gotop_read_data,
 667         },
 668 #endif
 669 };
 670
 671
 672 /*****************************************************************************
 673  * Generic Part
 674  */
 675 static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
 676                                  unsigned char *pkt, int len)
 677 {
 678         struct usbtouch_device_info *type = usbtouch->type;
 679
 680         if (!type->read_data(usbtouch, pkt))
 681                         return;
 682
 683         input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch);
 684
 685         if (swap_xy) {
 686                 input_report_abs(usbtouch->input, ABS_X, usbtouch->y);
 687                 input_report_abs(usbtouch->input, ABS_Y, usbtouch->x);
 688         } else {
 689                 input_report_abs(usbtouch->input, ABS_X, usbtouch->x);
 690                 input_report_abs(usbtouch->input, ABS_Y, usbtouch->y);
 691         }
 692         if (type->max_press)
 693                 input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press);
 694         input_sync(usbtouch->input);
 695 }
 696
 697
 698 #ifdef MULTI_PACKET
 699 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
 700                                    unsigned char *pkt, int len)
 701 {
 702         unsigned char *buffer;
 703         int pkt_len, pos, buf_len, tmp;
 704
 705         /* process buffer */
 706         if (unlikely(usbtouch->buf_len)) {
 707                 /* try to get size */
 708                 pkt_len = usbtouch->type->get_pkt_len(
 709                                 usbtouch->buffer, usbtouch->buf_len);
 710
 711                 /* drop? */
 712                 if (unlikely(!pkt_len))
 713                         goto out_flush_buf;
 714
 715                 /* need to append -pkt_len bytes before able to get size */
 716                 if (unlikely(pkt_len < 0)) {
 717                         int append = -pkt_len;
 718                         if (unlikely(append > len))
 719                                append = len;
 720                         if (usbtouch->buf_len + append >= usbtouch->type->rept_size)
 721                                 goto out_flush_buf;
 722                         memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append);
 723                         usbtouch->buf_len += append;
 724
 725                         pkt_len = usbtouch->type->get_pkt_len(
 726                                         usbtouch->buffer, usbtouch->buf_len);
 727                         if (pkt_len < 0)
 728                                 return;
 729                 }
 730
 731                 /* append */
 732                 tmp = pkt_len - usbtouch->buf_len;
 733                 if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size)
 734                         goto out_flush_buf;
 735                 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp);
 736                 usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len);
 737
 738                 buffer = pkt + tmp;
 739                 buf_len = len - tmp;
 740         } else {
 741                 buffer = pkt;
 742                 buf_len = len;
 743         }
 744
 745         /* loop over the received packet, process */
 746         pos = 0;
 747         while (pos < buf_len) {
 748                 /* get packet len */
 749                 pkt_len = usbtouch->type->get_pkt_len(buffer + pos,
 750                                                         buf_len - pos);
 751
 752                 /* unknown packet: skip one byte */
 753                 if (unlikely(!pkt_len)) {
 754                         pos++;
 755                         continue;
 756                 }
 757
 758                 /* full packet: process */
 759                 if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) {
 760                         usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len);
 761                 } else {
 762                         /* incomplete packet: save in buffer */
 763                         memcpy(usbtouch->buffer, buffer + pos, buf_len - pos);
 764                         usbtouch->buf_len = buf_len - pos;
 765                         return;
 766                 }
 767                 pos += pkt_len;
 768         }
 769
 770 out_flush_buf:
 771         usbtouch->buf_len = 0;
 772         return;
 773 }
 774 #endif
 775
 776
 777 static void usbtouch_irq(struct urb *urb)
 778 {
 779         struct usbtouch_usb *usbtouch = urb->context;
 780         int retval;
 781
 782         switch (urb->status) {
 783         case 0:
 784                 /* success */
 785                 break;
 786         case -ETIME:
 787                 /* this urb is timing out */
 788                 dbg("%s - urb timed out - was the device unplugged?",
 789                     __FUNCTION__);
 790                 return;
 791         case -ECONNRESET:
 792         case -ENOENT:
 793         case -ESHUTDOWN:
 794                 /* this urb is terminated, clean up */
 795                 dbg("%s - urb shutting down with status: %d",
 796                     __FUNCTION__, urb->status);
 797                 return;
 798         default:
 799                 dbg("%s - nonzero urb status received: %d",
 800                     __FUNCTION__, urb->status);
 801                 goto exit;
 802         }
 803
 804         usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length);
 805
 806 exit:
 807         retval = usb_submit_urb(urb, GFP_ATOMIC);
 808         if (retval)
 809                 err("%s - usb_submit_urb failed with result: %d",
 810                     __FUNCTION__, retval);
 811 }
 812
 813 static int usbtouch_open(struct input_dev *input)
 814 {
 815         struct usbtouch_usb *usbtouch = input_get_drvdata(input);
 816
 817         usbtouch->irq->dev = usbtouch->udev;
 818
 819         if (usb_submit_urb(usbtouch->irq, GFP_KERNEL))
 820                 return -EIO;
 821
 822         return 0;
 823 }
 824
 825 static void usbtouch_close(struct input_dev *input)
 826 {
 827         struct usbtouch_usb *usbtouch = input_get_drvdata(input);
 828
 829         usb_kill_urb(usbtouch->irq);
 830 }
 831
 832
 833 static void usbtouch_free_buffers(struct usb_device *udev,
 834                                   struct usbtouch_usb *usbtouch)
 835 {
 836         usb_buffer_free(udev, usbtouch->type->rept_size,
 837                         usbtouch->data, usbtouch->data_dma);
 838         kfree(usbtouch->buffer);
 839 }
 840
 841
 842 static int usbtouch_probe(struct usb_interface *intf,
 843                           const struct usb_device_id *id)
 844 {
 845         struct usbtouch_usb *usbtouch;
 846         struct input_dev *input_dev;
 847         struct usb_host_interface *interface;
 848         struct usb_endpoint_descriptor *endpoint;
 849         struct usb_device *udev = interface_to_usbdev(intf);
 850         struct usbtouch_device_info *type;
 851         int err = -ENOMEM;
 852
 853         interface = intf->cur_altsetting;
 854         endpoint = &interface->endpoint[0].desc;
 855
 856         usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL);
 857         input_dev = input_allocate_device();
 858         if (!usbtouch || !input_dev)
 859                 goto out_free;
 860
 861         type = &usbtouch_dev_info[id->driver_info];
 862         usbtouch->type = type;
 863         if (!type->process_pkt)
 864                 type->process_pkt = usbtouch_process_pkt;
 865
 866         usbtouch->data = usb_buffer_alloc(udev, type->rept_size,
 867                                           GFP_KERNEL, &usbtouch->data_dma);
 868         if (!usbtouch->data)
 869                 goto out_free;
 870
 871         if (type->get_pkt_len) {
 872                 usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL);
 873                 if (!usbtouch->buffer)
 874                         goto out_free_buffers;
 875         }
 876
 877         usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
 878         if (!usbtouch->irq) {
 879                 dbg("%s - usb_alloc_urb failed: usbtouch->irq", __FUNCTION__);
 880                 goto out_free_buffers;
 881         }
 882
 883         usbtouch->udev = udev;
 884         usbtouch->input = input_dev;
 885
 886         if (udev->manufacturer)
 887                 strlcpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name));
 888
 889         if (udev->product) {
 890                 if (udev->manufacturer)
 891                         strlcat(usbtouch->name, " ", sizeof(usbtouch->name));
 892                 strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name));
 893         }
 894
 895         if (!strlen(usbtouch->name))
 896                 snprintf(usbtouch->name, sizeof(usbtouch->name),
 897                         "USB Touchscreen %04x:%04x",
 898                          le16_to_cpu(udev->descriptor.idVendor),
 899                          le16_to_cpu(udev->descriptor.idProduct));
 900
 901         usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys));
 902         strlcat(usbtouch->phys, "/input0", sizeof(usbtouch->phys));
 903
 904         input_dev->name = usbtouch->name;
 905         input_dev->phys = usbtouch->phys;
 906         usb_to_input_id(udev, &input_dev->id);
 907         input_dev->dev.parent = &intf->dev;
 908
 909         input_set_drvdata(input_dev, usbtouch);
 910
 911         input_dev->open = usbtouch_open;
 912         input_dev->close = usbtouch_close;
 913
 914         input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
 915         input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
 916         input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0);
 917         input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0);
 918         if (type->max_press)
 919                 input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press,
 920                                      type->max_press, 0, 0);
 921
 922         usb_fill_int_urb(usbtouch->irq, usbtouch->udev,
 923                          usb_rcvintpipe(usbtouch->udev, endpoint->bEndpointAddress),
 924                          usbtouch->data, type->rept_size,
 925                          usbtouch_irq, usbtouch, endpoint->bInterval);
 926
 927         usbtouch->irq->dev = usbtouch->udev;
 928         usbtouch->irq->transfer_dma = usbtouch->data_dma;
 929         usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 930
 931         /* device specific init */
 932         if (type->init) {
 933                 err = type->init(usbtouch);
 934                 if (err) {
 935                         dbg("%s - type->init() failed, err: %d", __FUNCTION__, err);
 936                         goto out_free_buffers;
 937                 }
 938         }
 939
 940         err = input_register_device(usbtouch->input);
 941         if (err) {
 942                 dbg("%s - input_register_device failed, err: %d", __FUNCTION__, err);
 943                 goto out_free_buffers;
 944         }
 945
 946         usb_set_intfdata(intf, usbtouch);
 947
 948         return 0;
 949
 950 out_free_buffers:
 951         usbtouch_free_buffers(udev, usbtouch);
 952 out_free:
 953         input_free_device(input_dev);
 954         kfree(usbtouch);
 955         return err;
 956 }
 957
 958 static void usbtouch_disconnect(struct usb_interface *intf)
 959 {
 960         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
 961
 962         dbg("%s - called", __FUNCTION__);
 963
 964         if (!usbtouch)
 965                 return;
 966
 967         dbg("%s - usbtouch is initialized, cleaning up", __FUNCTION__);
 968         usb_set_intfdata(intf, NULL);
 969         usb_kill_urb(usbtouch->irq);
 970         input_unregister_device(usbtouch->input);
 971         usb_free_urb(usbtouch->irq);
 972         usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch);
 973         kfree(usbtouch);
 974 }
 975
 976 MODULE_DEVICE_TABLE(usb, usbtouch_devices);
 977
 978 static struct usb_driver usbtouch_driver = {
 979         .name           = "usbtouchscreen",
 980         .probe          = usbtouch_probe,
 981         .disconnect     = usbtouch_disconnect,
 982         .id_table       = usbtouch_devices,
 983 };
 984
 985 static int __init usbtouch_init(void)
 986 {
 987         return usb_register(&usbtouch_driver);
 988 }
 989
 990 static void __exit usbtouch_cleanup(void)
 991 {
 992         usb_deregister(&usbtouch_driver);
 993 }
 994
 995 module_init(usbtouch_init);
 996 module_exit(usbtouch_cleanup);
 997
 998 MODULE_AUTHOR(DRIVER_AUTHOR);
 999 MODULE_DESCRIPTION(DRIVER_DESC);
1000 MODULE_LICENSE("GPL");
1001
1002 MODULE_ALIAS("touchkitusb");
1003 MODULE_ALIAS("itmtouch");
1004 MODULE_ALIAS("mtouchusb");