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   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  *
  15  * Copyright (C) 2004-2006 by Daniel Ritz <daniel.ritz@gmx.ch>
  16  * Copyright (C) by Todd E. Johnson (mtouchusb.c)
  17  *
  18  * This program is free software; you can redistribute it and/or
  19  * modify it under the terms of the GNU General Public License as
  20  * published by the Free Software Foundation; either version 2 of the
  21  * License, or (at your option) any later version.
  22  *
  23  * This program is distributed in the hope that it will be useful, but
  24  * WITHOUT ANY WARRANTY; without even the implied warranty of
  25  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  26  * General Public License for more details.
  27  *
  28  * You should have received a copy of the GNU General Public License
  29  * along with this program; if not, write to the Free Software
  30  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  31  *
  32  * Driver is based on touchkitusb.c
  33  * - ITM parts are from itmtouch.c
  34  * - 3M parts are from mtouchusb.c
  35  * - PanJit parts are from an unmerged driver by Lanslott Gish
  36  * - DMC TSC 10/25 are from Holger Schurig, with ideas from an unmerged
  37  *   driver from Marius Vollmer
  38  *
  39  *****************************************************************************/
  40
  41 //#define DEBUG
  42
  43 #include <linux/kernel.h>
  44 #include <linux/slab.h>
  45 #include <linux/input.h>
  46 #include <linux/module.h>
  47 #include <linux/init.h>
  48 #include <linux/usb.h>
  49 #include <linux/usb/input.h>
  50
  51
  52 #define DRIVER_VERSION          "v0.5"
  53 #define DRIVER_AUTHOR           "Daniel Ritz <daniel.ritz@gmx.ch>"
  54 #define DRIVER_DESC             "USB Touchscreen Driver"
  55
  56 static int swap_xy;
  57 module_param(swap_xy, bool, 0644);
  58 MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");
  59
  60 /* device specifc data/functions */
  61 struct usbtouch_usb;
  62 struct usbtouch_device_info {
  63         int min_xc, max_xc;
  64         int min_yc, max_yc;
  65         int min_press, max_press;
  66         int rept_size;
  67         int flags;
  68
  69         void (*process_pkt) (struct usbtouch_usb *usbtouch, unsigned char *pkt, int len);
  70         int  (*get_pkt_len) (unsigned char *pkt, int len);
  71         int  (*read_data)   (struct usbtouch_usb *usbtouch, unsigned char *pkt);
  72         int  (*init)        (struct usbtouch_usb *usbtouch);
  73 };
  74
  75 #define USBTOUCH_FLG_BUFFER     0x01
  76
  77
  78 /* a usbtouch device */
  79 struct usbtouch_usb {
  80         unsigned char *data;
  81         dma_addr_t data_dma;
  82         unsigned char *buffer;
  83         int buf_len;
  84         struct urb *irq;
  85         struct usb_device *udev;
  86         struct input_dev *input;
  87         struct usbtouch_device_info *type;
  88         char name[128];
  89         char phys[64];
  90
  91         int x, y;
  92         int touch, press;
  93 };
  94
  95
  96 #if defined(CONFIG_TOUCHSCREEN_USB_EGALAX) || defined(CONFIG_TOUCHSCREEN_USB_ETURBO) || defined(CONFIG_TOUCHSCREEN_USB_IDEALTEK)
  97 #define MULTI_PACKET
  98 #endif
  99
 100 #ifdef MULTI_PACKET
 101 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
 102                                    unsigned char *pkt, int len);
 103 #endif
 104
 105 /* device types */
 106 enum {
 107         DEVTPYE_DUMMY = -1,
 108         DEVTYPE_EGALAX,
 109         DEVTYPE_PANJIT,
 110         DEVTYPE_3M,
 111         DEVTYPE_ITM,
 112         DEVTYPE_ETURBO,
 113         DEVTYPE_GUNZE,
 114         DEVTYPE_DMC_TSC10,
 115         DEVTYPE_IRTOUCH,
 116         DEVTYPE_IDEALTEK,
 117 };
 118
 119 static struct usb_device_id usbtouch_devices[] = {
 120 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
 121         {USB_DEVICE(0x3823, 0x0001), .driver_info = DEVTYPE_EGALAX},
 122         {USB_DEVICE(0x3823, 0x0002), .driver_info = DEVTYPE_EGALAX},
 123         {USB_DEVICE(0x0123, 0x0001), .driver_info = DEVTYPE_EGALAX},
 124         {USB_DEVICE(0x0eef, 0x0001), .driver_info = DEVTYPE_EGALAX},
 125         {USB_DEVICE(0x0eef, 0x0002), .driver_info = DEVTYPE_EGALAX},
 126         {USB_DEVICE(0x1234, 0x0001), .driver_info = DEVTYPE_EGALAX},
 127         {USB_DEVICE(0x1234, 0x0002), .driver_info = DEVTYPE_EGALAX},
 128 #endif
 129
 130 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
 131         {USB_DEVICE(0x134c, 0x0001), .driver_info = DEVTYPE_PANJIT},
 132         {USB_DEVICE(0x134c, 0x0002), .driver_info = DEVTYPE_PANJIT},
 133         {USB_DEVICE(0x134c, 0x0003), .driver_info = DEVTYPE_PANJIT},
 134         {USB_DEVICE(0x134c, 0x0004), .driver_info = DEVTYPE_PANJIT},
 135 #endif
 136
 137 #ifdef CONFIG_TOUCHSCREEN_USB_3M
 138         {USB_DEVICE(0x0596, 0x0001), .driver_info = DEVTYPE_3M},
 139 #endif
 140
 141 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
 142         {USB_DEVICE(0x0403, 0xf9e9), .driver_info = DEVTYPE_ITM},
 143 #endif
 144
 145 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
 146         {USB_DEVICE(0x1234, 0x5678), .driver_info = DEVTYPE_ETURBO},
 147 #endif
 148
 149 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
 150         {USB_DEVICE(0x0637, 0x0001), .driver_info = DEVTYPE_GUNZE},
 151 #endif
 152
 153 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
 154         {USB_DEVICE(0x0afa, 0x03e8), .driver_info = DEVTYPE_DMC_TSC10},
 155 #endif
 156
 157 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
 158         {USB_DEVICE(0x595a, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
 159         {USB_DEVICE(0x6615, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
 160 #endif
 161
 162 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
 163         {USB_DEVICE(0x1391, 0x1000), .driver_info = DEVTYPE_IDEALTEK},
 164 #endif
 165
 166         {}
 167 };
 168
 169
 170 /*****************************************************************************
 171  * eGalax part
 172  */
 173
 174 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
 175
 176 #define EGALAX_PKT_TYPE_MASK            0xFE
 177 #define EGALAX_PKT_TYPE_REPT            0x80
 178 #define EGALAX_PKT_TYPE_DIAG            0x0A
 179
 180 static int egalax_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 181 {
 182         if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT)
 183                 return 0;
 184
 185         dev->x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F);
 186         dev->y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F);
 187         dev->touch = pkt[0] & 0x01;
 188
 189         return 1;
 190 }
 191
 192 static int egalax_get_pkt_len(unsigned char *buf, int len)
 193 {
 194         switch (buf[0] & EGALAX_PKT_TYPE_MASK) {
 195         case EGALAX_PKT_TYPE_REPT:
 196                 return 5;
 197
 198         case EGALAX_PKT_TYPE_DIAG:
 199                 if (len < 2)
 200                         return -1;
 201
 202                 return buf[1] + 2;
 203         }
 204
 205         return 0;
 206 }
 207 #endif
 208
 209
 210 /*****************************************************************************
 211  * PanJit Part
 212  */
 213 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
 214 static int panjit_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 215 {
 216         dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
 217         dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
 218         dev->touch = pkt[0] & 0x01;
 219
 220         return 1;
 221 }
 222 #endif
 223
 224
 225 /*****************************************************************************
 226  * 3M/Microtouch Part
 227  */
 228 #ifdef CONFIG_TOUCHSCREEN_USB_3M
 229
 230 #define MTOUCHUSB_ASYNC_REPORT          1
 231 #define MTOUCHUSB_RESET                 7
 232 #define MTOUCHUSB_REQ_CTRLLR_ID         10
 233
 234 static int mtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 235 {
 236         dev->x = (pkt[8] << 8) | pkt[7];
 237         dev->y = (pkt[10] << 8) | pkt[9];
 238         dev->touch = (pkt[2] & 0x40) ? 1 : 0;
 239
 240         return 1;
 241 }
 242
 243 static int mtouch_init(struct usbtouch_usb *usbtouch)
 244 {
 245         int ret, i;
 246
 247         ret = usb_control_msg(usbtouch->udev, usb_rcvctrlpipe(usbtouch->udev, 0),
 248                               MTOUCHUSB_RESET,
 249                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 250                               1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
 251         dbg("%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d",
 252             __FUNCTION__, ret);
 253         if (ret < 0)
 254                 return ret;
 255         msleep(150);
 256
 257         for (i = 0; i < 3; i++) {
 258                 ret = usb_control_msg(usbtouch->udev, usb_rcvctrlpipe(usbtouch->udev, 0),
 259                                       MTOUCHUSB_ASYNC_REPORT,
 260                                       USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 261                                       1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT);
 262                 dbg("%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d",
 263                     __FUNCTION__, ret);
 264                 if (ret >= 0)
 265                         break;
 266                 if (ret != -EPIPE)
 267                         return ret;
 268         }
 269
 270         return 0;
 271 }
 272 #endif
 273
 274
 275 /*****************************************************************************
 276  * ITM Part
 277  */
 278 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
 279 static int itm_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 280 {
 281         int touch;
 282         /*
 283          * ITM devices report invalid x/y data if not touched.
 284          * if the screen was touched before but is not touched any more
 285          * report touch as 0 with the last valid x/y data once. then stop
 286          * reporting data until touched again.
 287          */
 288         dev->press = ((pkt[2] & 0x01) << 7) | (pkt[5] & 0x7F);
 289
 290         touch = ~pkt[7] & 0x20;
 291         if (!touch) {
 292                 if (dev->touch) {
 293                         dev->touch = 0;
 294                         return 1;
 295                 }
 296
 297                 return 0;
 298         }
 299
 300         dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F);
 301         dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F);
 302         dev->touch = touch;
 303
 304         return 1;
 305 }
 306 #endif
 307
 308
 309 /*****************************************************************************
 310  * eTurboTouch part
 311  */
 312 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
 313 static int eturbo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 314 {
 315         unsigned int shift;
 316
 317         /* packets should start with sync */
 318         if (!(pkt[0] & 0x80))
 319                 return 0;
 320
 321         shift = (6 - (pkt[0] & 0x03));
 322         dev->x = ((pkt[3] << 7) | pkt[4]) >> shift;
 323         dev->y = ((pkt[1] << 7) | pkt[2]) >> shift;
 324         dev->touch = (pkt[0] & 0x10) ? 1 : 0;
 325
 326         return 1;
 327 }
 328
 329 static int eturbo_get_pkt_len(unsigned char *buf, int len)
 330 {
 331         if (buf[0] & 0x80)
 332                 return 5;
 333         if (buf[0] == 0x01)
 334                 return 3;
 335         return 0;
 336 }
 337 #endif
 338
 339
 340 /*****************************************************************************
 341  * Gunze part
 342  */
 343 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
 344 static int gunze_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 345 {
 346         if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80))
 347                 return 0;
 348
 349         dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F);
 350         dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F);
 351         dev->touch = pkt[0] & 0x20;
 352
 353         return 1;
 354 }
 355 #endif
 356
 357 /*****************************************************************************
 358  * DMC TSC-10/25 Part
 359  *
 360  * Documentation about the controller and it's protocol can be found at
 361  *   http://www.dmccoltd.com/files/controler/tsc10usb_pi_e.pdf
 362  *   http://www.dmccoltd.com/files/controler/tsc25_usb_e.pdf
 363  */
 364 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
 365
 366 /* supported data rates. currently using 130 */
 367 #define TSC10_RATE_POINT        0x50
 368 #define TSC10_RATE_30           0x40
 369 #define TSC10_RATE_50           0x41
 370 #define TSC10_RATE_80           0x42
 371 #define TSC10_RATE_100          0x43
 372 #define TSC10_RATE_130          0x44
 373 #define TSC10_RATE_150          0x45
 374
 375 /* commands */
 376 #define TSC10_CMD_RESET         0x55
 377 #define TSC10_CMD_RATE          0x05
 378 #define TSC10_CMD_DATA1         0x01
 379
 380 static int dmc_tsc10_init(struct usbtouch_usb *usbtouch)
 381 {
 382         struct usb_device *dev = usbtouch->udev;
 383         int ret;
 384         unsigned char buf[2];
 385
 386         /* reset */
 387         buf[0] = buf[1] = 0xFF;
 388         ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
 389                               TSC10_CMD_RESET,
 390                               USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 391                               0, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
 392         if (ret < 0)
 393                 return ret;
 394         if (buf[0] != 0x06 || buf[1] != 0x00)
 395                 return -ENODEV;
 396
 397         /* set coordinate output rate */
 398         buf[0] = buf[1] = 0xFF;
 399         ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
 400                               TSC10_CMD_RATE,
 401                               USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 402                               TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
 403         if (ret < 0)
 404                 return ret;
 405         if ((buf[0] != 0x06 || buf[1] != 0x00) &&
 406             (buf[0] != 0x15 || buf[1] != 0x01))
 407                 return -ENODEV;
 408
 409         /* start sending data */
 410         ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
 411                               TSC10_CMD_DATA1,
 412                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 413                               0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
 414         if (ret < 0)
 415                 return ret;
 416
 417         return 0;
 418 }
 419
 420
 421 static int dmc_tsc10_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 422 {
 423         dev->x = ((pkt[2] & 0x03) << 8) | pkt[1];
 424         dev->y = ((pkt[4] & 0x03) << 8) | pkt[3];
 425         dev->touch = pkt[0] & 0x01;
 426
 427         return 1;
 428 }
 429 #endif
 430
 431
 432 /*****************************************************************************
 433  * IRTOUCH Part
 434  */
 435 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
 436 static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 437 {
 438         dev->x = (pkt[3] << 8) | pkt[2];
 439         dev->y = (pkt[5] << 8) | pkt[4];
 440         dev->touch = (pkt[1] & 0x03) ? 1 : 0;
 441
 442         return 1;
 443 }
 444 #endif
 445
 446
 447 /*****************************************************************************
 448  * IdealTEK URTC1000 Part
 449  */
 450 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
 451 static int idealtek_get_pkt_len(unsigned char *buf, int len)
 452 {
 453         if (buf[0] & 0x80)
 454                 return 5;
 455         if (buf[0] == 0x01)
 456                 return len;
 457         return 0;
 458 }
 459
 460 static int idealtek_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 461 {
 462         switch (pkt[0] & 0x98) {
 463         case 0x88:
 464                 /* touch data in IdealTEK mode */
 465                 dev->x = (pkt[1] << 5) | (pkt[2] >> 2);
 466                 dev->y = (pkt[3] << 5) | (pkt[4] >> 2);
 467                 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
 468                 return 1;
 469
 470         case 0x98:
 471                 /* touch data in MT emulation mode */
 472                 dev->x = (pkt[2] << 5) | (pkt[1] >> 2);
 473                 dev->y = (pkt[4] << 5) | (pkt[3] >> 2);
 474                 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
 475                 return 1;
 476
 477         default:
 478                 return 0;
 479         }
 480 }
 481 #endif
 482
 483
 484 /*****************************************************************************
 485  * the different device descriptors
 486  */
 487 static struct usbtouch_device_info usbtouch_dev_info[] = {
 488 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
 489         [DEVTYPE_EGALAX] = {
 490                 .min_xc         = 0x0,
 491                 .max_xc         = 0x07ff,
 492                 .min_yc         = 0x0,
 493                 .max_yc         = 0x07ff,
 494                 .rept_size      = 16,
 495                 .flags          = USBTOUCH_FLG_BUFFER,
 496                 .process_pkt    = usbtouch_process_multi,
 497                 .get_pkt_len    = egalax_get_pkt_len,
 498                 .read_data      = egalax_read_data,
 499         },
 500 #endif
 501
 502 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
 503         [DEVTYPE_PANJIT] = {
 504                 .min_xc         = 0x0,
 505                 .max_xc         = 0x0fff,
 506                 .min_yc         = 0x0,
 507                 .max_yc         = 0x0fff,
 508                 .rept_size      = 8,
 509                 .read_data      = panjit_read_data,
 510         },
 511 #endif
 512
 513 #ifdef CONFIG_TOUCHSCREEN_USB_3M
 514         [DEVTYPE_3M] = {
 515                 .min_xc         = 0x0,
 516                 .max_xc         = 0x4000,
 517                 .min_yc         = 0x0,
 518                 .max_yc         = 0x4000,
 519                 .rept_size      = 11,
 520                 .read_data      = mtouch_read_data,
 521                 .init           = mtouch_init,
 522         },
 523 #endif
 524
 525 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
 526         [DEVTYPE_ITM] = {
 527                 .min_xc         = 0x0,
 528                 .max_xc         = 0x0fff,
 529                 .min_yc         = 0x0,
 530                 .max_yc         = 0x0fff,
 531                 .max_press      = 0xff,
 532                 .rept_size      = 8,
 533                 .read_data      = itm_read_data,
 534         },
 535 #endif
 536
 537 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
 538         [DEVTYPE_ETURBO] = {
 539                 .min_xc         = 0x0,
 540                 .max_xc         = 0x07ff,
 541                 .min_yc         = 0x0,
 542                 .max_yc         = 0x07ff,
 543                 .rept_size      = 8,
 544                 .flags          = USBTOUCH_FLG_BUFFER,
 545                 .process_pkt    = usbtouch_process_multi,
 546                 .get_pkt_len    = eturbo_get_pkt_len,
 547                 .read_data      = eturbo_read_data,
 548         },
 549 #endif
 550
 551 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
 552         [DEVTYPE_GUNZE] = {
 553                 .min_xc         = 0x0,
 554                 .max_xc         = 0x0fff,
 555                 .min_yc         = 0x0,
 556                 .max_yc         = 0x0fff,
 557                 .rept_size      = 4,
 558                 .read_data      = gunze_read_data,
 559         },
 560 #endif
 561
 562 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
 563         [DEVTYPE_DMC_TSC10] = {
 564                 .min_xc         = 0x0,
 565                 .max_xc         = 0x03ff,
 566                 .min_yc         = 0x0,
 567                 .max_yc         = 0x03ff,
 568                 .rept_size      = 5,
 569                 .init           = dmc_tsc10_init,
 570                 .read_data      = dmc_tsc10_read_data,
 571         },
 572 #endif
 573
 574 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
 575         [DEVTYPE_IRTOUCH] = {
 576                 .min_xc         = 0x0,
 577                 .max_xc         = 0x0fff,
 578                 .min_yc         = 0x0,
 579                 .max_yc         = 0x0fff,
 580                 .rept_size      = 8,
 581                 .read_data      = irtouch_read_data,
 582         },
 583 #endif
 584
 585 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
 586         [DEVTYPE_IDEALTEK] = {
 587                 .min_xc         = 0x0,
 588                 .max_xc         = 0x0fff,
 589                 .min_yc         = 0x0,
 590                 .max_yc         = 0x0fff,
 591                 .rept_size      = 8,
 592                 .flags          = USBTOUCH_FLG_BUFFER,
 593                 .process_pkt    = usbtouch_process_multi,
 594                 .get_pkt_len    = idealtek_get_pkt_len,
 595                 .read_data      = idealtek_read_data,
 596         },
 597 #endif
 598 };
 599
 600
 601 /*****************************************************************************
 602  * Generic Part
 603  */
 604 static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
 605                                  unsigned char *pkt, int len)
 606 {
 607         struct usbtouch_device_info *type = usbtouch->type;
 608
 609         if (!type->read_data(usbtouch, pkt))
 610                         return;
 611
 612         input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch);
 613
 614         if (swap_xy) {
 615                 input_report_abs(usbtouch->input, ABS_X, usbtouch->y);
 616                 input_report_abs(usbtouch->input, ABS_Y, usbtouch->x);
 617         } else {
 618                 input_report_abs(usbtouch->input, ABS_X, usbtouch->x);
 619                 input_report_abs(usbtouch->input, ABS_Y, usbtouch->y);
 620         }
 621         if (type->max_press)
 622                 input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press);
 623         input_sync(usbtouch->input);
 624 }
 625
 626
 627 #ifdef MULTI_PACKET
 628 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
 629                                    unsigned char *pkt, int len)
 630 {
 631         unsigned char *buffer;
 632         int pkt_len, pos, buf_len, tmp;
 633
 634         /* process buffer */
 635         if (unlikely(usbtouch->buf_len)) {
 636                 /* try to get size */
 637                 pkt_len = usbtouch->type->get_pkt_len(
 638                                 usbtouch->buffer, usbtouch->buf_len);
 639
 640                 /* drop? */
 641                 if (unlikely(!pkt_len))
 642                         goto out_flush_buf;
 643
 644                 /* need to append -pkt_len bytes before able to get size */
 645                 if (unlikely(pkt_len < 0)) {
 646                         int append = -pkt_len;
 647                         if (unlikely(append > len))
 648                                append = len;
 649                         if (usbtouch->buf_len + append >= usbtouch->type->rept_size)
 650                                 goto out_flush_buf;
 651                         memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append);
 652                         usbtouch->buf_len += append;
 653
 654                         pkt_len = usbtouch->type->get_pkt_len(
 655                                         usbtouch->buffer, usbtouch->buf_len);
 656                         if (pkt_len < 0)
 657                                 return;
 658                 }
 659
 660                 /* append */
 661                 tmp = pkt_len - usbtouch->buf_len;
 662                 if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size)
 663                         goto out_flush_buf;
 664                 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp);
 665                 usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len);
 666
 667                 buffer = pkt + tmp;
 668                 buf_len = len - tmp;
 669         } else {
 670                 buffer = pkt;
 671                 buf_len = len;
 672         }
 673
 674         /* loop over the received packet, process */
 675         pos = 0;
 676         while (pos < buf_len) {
 677                 /* get packet len */
 678                 pkt_len = usbtouch->type->get_pkt_len(buffer + pos, len);
 679
 680                 /* unknown packet: drop everything */
 681                 if (unlikely(!pkt_len))
 682                         goto out_flush_buf;
 683
 684                 /* full packet: process */
 685                 if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) {
 686                         usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len);
 687                 } else {
 688                         /* incomplete packet: save in buffer */
 689                         memcpy(usbtouch->buffer, buffer + pos, buf_len - pos);
 690                         usbtouch->buf_len = buf_len - pos;
 691                         return;
 692                 }
 693                 pos += pkt_len;
 694         }
 695
 696 out_flush_buf:
 697         usbtouch->buf_len = 0;
 698         return;
 699 }
 700 #endif
 701
 702
 703 static void usbtouch_irq(struct urb *urb)
 704 {
 705         struct usbtouch_usb *usbtouch = urb->context;
 706         int retval;
 707
 708         switch (urb->status) {
 709         case 0:
 710                 /* success */
 711                 break;
 712         case -ETIME:
 713                 /* this urb is timing out */
 714                 dbg("%s - urb timed out - was the device unplugged?",
 715                     __FUNCTION__);
 716                 return;
 717         case -ECONNRESET:
 718         case -ENOENT:
 719         case -ESHUTDOWN:
 720                 /* this urb is terminated, clean up */
 721                 dbg("%s - urb shutting down with status: %d",
 722                     __FUNCTION__, urb->status);
 723                 return;
 724         default:
 725                 dbg("%s - nonzero urb status received: %d",
 726                     __FUNCTION__, urb->status);
 727                 goto exit;
 728         }
 729
 730         usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length);
 731
 732 exit:
 733         retval = usb_submit_urb(urb, GFP_ATOMIC);
 734         if (retval)
 735                 err("%s - usb_submit_urb failed with result: %d",
 736                     __FUNCTION__, retval);
 737 }
 738
 739 static int usbtouch_open(struct input_dev *input)
 740 {
 741         struct usbtouch_usb *usbtouch = input_get_drvdata(input);
 742
 743         usbtouch->irq->dev = usbtouch->udev;
 744
 745         if (usb_submit_urb(usbtouch->irq, GFP_KERNEL))
 746                 return -EIO;
 747
 748         return 0;
 749 }
 750
 751 static void usbtouch_close(struct input_dev *input)
 752 {
 753         struct usbtouch_usb *usbtouch = input_get_drvdata(input);
 754
 755         usb_kill_urb(usbtouch->irq);
 756 }
 757
 758
 759 static void usbtouch_free_buffers(struct usb_device *udev,
 760                                   struct usbtouch_usb *usbtouch)
 761 {
 762         usb_buffer_free(udev, usbtouch->type->rept_size,
 763                         usbtouch->data, usbtouch->data_dma);
 764         kfree(usbtouch->buffer);
 765 }
 766
 767
 768 static int usbtouch_probe(struct usb_interface *intf,
 769                           const struct usb_device_id *id)
 770 {
 771         struct usbtouch_usb *usbtouch;
 772         struct input_dev *input_dev;
 773         struct usb_host_interface *interface;
 774         struct usb_endpoint_descriptor *endpoint;
 775         struct usb_device *udev = interface_to_usbdev(intf);
 776         struct usbtouch_device_info *type;
 777         int err = -ENOMEM;
 778
 779         interface = intf->cur_altsetting;
 780         endpoint = &interface->endpoint[0].desc;
 781
 782         usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL);
 783         input_dev = input_allocate_device();
 784         if (!usbtouch || !input_dev)
 785                 goto out_free;
 786
 787         type = &usbtouch_dev_info[id->driver_info];
 788         usbtouch->type = type;
 789         if (!type->process_pkt)
 790                 type->process_pkt = usbtouch_process_pkt;
 791
 792         usbtouch->data = usb_buffer_alloc(udev, type->rept_size,
 793                                           GFP_KERNEL, &usbtouch->data_dma);
 794         if (!usbtouch->data)
 795                 goto out_free;
 796
 797         if (type->flags & USBTOUCH_FLG_BUFFER) {
 798                 usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL);
 799                 if (!usbtouch->buffer)
 800                         goto out_free_buffers;
 801         }
 802
 803         usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
 804         if (!usbtouch->irq) {
 805                 dbg("%s - usb_alloc_urb failed: usbtouch->irq", __FUNCTION__);
 806                 goto out_free_buffers;
 807         }
 808
 809         usbtouch->udev = udev;
 810         usbtouch->input = input_dev;
 811
 812         if (udev->manufacturer)
 813                 strlcpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name));
 814
 815         if (udev->product) {
 816                 if (udev->manufacturer)
 817                         strlcat(usbtouch->name, " ", sizeof(usbtouch->name));
 818                 strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name));
 819         }
 820
 821         if (!strlen(usbtouch->name))
 822                 snprintf(usbtouch->name, sizeof(usbtouch->name),
 823                         "USB Touchscreen %04x:%04x",
 824                          le16_to_cpu(udev->descriptor.idVendor),
 825                          le16_to_cpu(udev->descriptor.idProduct));
 826
 827         usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys));
 828         strlcpy(usbtouch->phys, "/input0", sizeof(usbtouch->phys));
 829
 830         input_dev->name = usbtouch->name;
 831         input_dev->phys = usbtouch->phys;
 832         usb_to_input_id(udev, &input_dev->id);
 833         input_dev->dev.parent = &intf->dev;
 834
 835         input_set_drvdata(input_dev, usbtouch);
 836
 837         input_dev->open = usbtouch_open;
 838         input_dev->close = usbtouch_close;
 839
 840         input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
 841         input_dev->keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH);
 842         input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0);
 843         input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0);
 844         if (type->max_press)
 845                 input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press,
 846                                      type->max_press, 0, 0);
 847
 848         usb_fill_int_urb(usbtouch->irq, usbtouch->udev,
 849                          usb_rcvintpipe(usbtouch->udev, endpoint->bEndpointAddress),
 850                          usbtouch->data, type->rept_size,
 851                          usbtouch_irq, usbtouch, endpoint->bInterval);
 852
 853         usbtouch->irq->dev = usbtouch->udev;
 854         usbtouch->irq->transfer_dma = usbtouch->data_dma;
 855         usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 856
 857         /* device specific init */
 858         if (type->init) {
 859                 err = type->init(usbtouch);
 860                 if (err) {
 861                         dbg("%s - type->init() failed, err: %d", __FUNCTION__, err);
 862                         goto out_free_buffers;
 863                 }
 864         }
 865
 866         err = input_register_device(usbtouch->input);
 867         if (err) {
 868                 dbg("%s - input_register_device failed, err: %d", __FUNCTION__, err);
 869                 goto out_free_buffers;
 870         }
 871
 872         usb_set_intfdata(intf, usbtouch);
 873
 874         return 0;
 875
 876 out_free_buffers:
 877         usbtouch_free_buffers(udev, usbtouch);
 878 out_free:
 879         input_free_device(input_dev);
 880         kfree(usbtouch);
 881         return err;
 882 }
 883
 884 static void usbtouch_disconnect(struct usb_interface *intf)
 885 {
 886         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
 887
 888         dbg("%s - called", __FUNCTION__);
 889
 890         if (!usbtouch)
 891                 return;
 892
 893         dbg("%s - usbtouch is initialized, cleaning up", __FUNCTION__);
 894         usb_set_intfdata(intf, NULL);
 895         usb_kill_urb(usbtouch->irq);
 896         input_unregister_device(usbtouch->input);
 897         usb_free_urb(usbtouch->irq);
 898         usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch);
 899         kfree(usbtouch);
 900 }
 901
 902 MODULE_DEVICE_TABLE(usb, usbtouch_devices);
 903
 904 static struct usb_driver usbtouch_driver = {
 905         .name           = "usbtouchscreen",
 906         .probe          = usbtouch_probe,
 907         .disconnect     = usbtouch_disconnect,
 908         .id_table       = usbtouch_devices,
 909 };
 910
 911 static int __init usbtouch_init(void)
 912 {
 913         return usb_register(&usbtouch_driver);
 914 }
 915
 916 static void __exit usbtouch_cleanup(void)
 917 {
 918         usb_deregister(&usbtouch_driver);
 919 }
 920
 921 module_init(usbtouch_init);
 922 module_exit(usbtouch_cleanup);
 923
 924 MODULE_AUTHOR(DRIVER_AUTHOR);
 925 MODULE_DESCRIPTION(DRIVER_DESC);
 926 MODULE_LICENSE("GPL");
 927
 928 MODULE_ALIAS("touchkitusb");
 929 MODULE_ALIAS("itmtouch");
 930 MODULE_ALIAS("mtouchusb");