drivers/usb/input/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  *
  13  * Copyright (C) 2004-2006 by Daniel Ritz <daniel.ritz@gmx.ch>
  14  * Copyright (C) by Todd E. Johnson (mtouchusb.c)
  15  *
  16  * This program is free software; you can redistribute it and/or
  17  * modify it under the terms of the GNU General Public License as
  18  * published by the Free Software Foundation; either version 2 of the
  19  * License, or (at your option) any later version.
  20  *
  21  * This program is distributed in the hope that it will be useful, but
  22  * WITHOUT ANY WARRANTY; without even the implied warranty of
  23  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  24  * General Public License for more details.
  25  *
  26  * You should have received a copy of the GNU General Public License
  27  * along with this program; if not, write to the Free Software
  28  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  29  *
  30  * Driver is based on touchkitusb.c
  31  * - ITM parts are from itmtouch.c
  32  * - 3M parts are from mtouchusb.c
  33  * - PanJit parts are from an unmerged driver by Lanslott Gish
  34  * - DMC TSC 10/25 are from Holger Schurig, with ideas from an unmerged
  35  *   driver from Marius Vollmer
  36  *
  37  *****************************************************************************/
  38
  39 //#define DEBUG
  40
  41 #include <linux/kernel.h>
  42 #include <linux/slab.h>
  43 #include <linux/input.h>
  44 #include <linux/module.h>
  45 #include <linux/init.h>
  46 #include <linux/usb.h>
  47 #include <linux/usb/input.h>
  48
  49
  50 #define DRIVER_VERSION          "v0.5"
  51 #define DRIVER_AUTHOR           "Daniel Ritz <daniel.ritz@gmx.ch>"
  52 #define DRIVER_DESC             "USB Touchscreen Driver"
  53
  54 static int swap_xy;
  55 module_param(swap_xy, bool, 0644);
  56 MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");
  57
  58 /* device specifc data/functions */
  59 struct usbtouch_usb;
  60 struct usbtouch_device_info {
  61         int min_xc, max_xc;
  62         int min_yc, max_yc;
  63         int min_press, max_press;
  64         int rept_size;
  65         int flags;
  66
  67         void (*process_pkt) (struct usbtouch_usb *usbtouch, unsigned char *pkt, int len);
  68         int  (*get_pkt_len) (unsigned char *pkt, int len);
  69         int  (*read_data)   (unsigned char *pkt, int *x, int *y, int *touch, int *press);
  70         int  (*init)        (struct usbtouch_usb *usbtouch);
  71 };
  72
  73 #define USBTOUCH_FLG_BUFFER     0x01
  74
  75
  76 /* a usbtouch device */
  77 struct usbtouch_usb {
  78         unsigned char *data;
  79         dma_addr_t data_dma;
  80         unsigned char *buffer;
  81         int buf_len;
  82         struct urb *irq;
  83         struct usb_device *udev;
  84         struct input_dev *input;
  85         struct usbtouch_device_info *type;
  86         char name[128];
  87         char phys[64];
  88 };
  89
  90
  91 #if defined(CONFIG_USB_TOUCHSCREEN_EGALAX) || defined(CONFIG_USB_TOUCHSCREEN_ETURBO)
  92 #define MULTI_PACKET
  93 #endif
  94
  95 #ifdef MULTI_PACKET
  96 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
  97                                    unsigned char *pkt, int len);
  98 #endif
  99
 100 /* device types */
 101 enum {
 102         DEVTPYE_DUMMY = -1,
 103         DEVTYPE_EGALAX,
 104         DEVTYPE_PANJIT,
 105         DEVTYPE_3M,
 106         DEVTYPE_ITM,
 107         DEVTYPE_ETURBO,
 108         DEVTYPE_GUNZE,
 109         DEVTYPE_DMC_TSC10,
 110 };
 111
 112 static struct usb_device_id usbtouch_devices[] = {
 113 #ifdef CONFIG_USB_TOUCHSCREEN_EGALAX
 114         {USB_DEVICE(0x3823, 0x0001), .driver_info = DEVTYPE_EGALAX},
 115         {USB_DEVICE(0x3823, 0x0002), .driver_info = DEVTYPE_EGALAX},
 116         {USB_DEVICE(0x0123, 0x0001), .driver_info = DEVTYPE_EGALAX},
 117         {USB_DEVICE(0x0eef, 0x0001), .driver_info = DEVTYPE_EGALAX},
 118         {USB_DEVICE(0x0eef, 0x0002), .driver_info = DEVTYPE_EGALAX},
 119         {USB_DEVICE(0x1234, 0x0001), .driver_info = DEVTYPE_EGALAX},
 120         {USB_DEVICE(0x1234, 0x0002), .driver_info = DEVTYPE_EGALAX},
 121 #endif
 122
 123 #ifdef CONFIG_USB_TOUCHSCREEN_PANJIT
 124         {USB_DEVICE(0x134c, 0x0001), .driver_info = DEVTYPE_PANJIT},
 125         {USB_DEVICE(0x134c, 0x0002), .driver_info = DEVTYPE_PANJIT},
 126         {USB_DEVICE(0x134c, 0x0003), .driver_info = DEVTYPE_PANJIT},
 127         {USB_DEVICE(0x134c, 0x0004), .driver_info = DEVTYPE_PANJIT},
 128 #endif
 129
 130 #ifdef CONFIG_USB_TOUCHSCREEN_3M
 131         {USB_DEVICE(0x0596, 0x0001), .driver_info = DEVTYPE_3M},
 132 #endif
 133
 134 #ifdef CONFIG_USB_TOUCHSCREEN_ITM
 135         {USB_DEVICE(0x0403, 0xf9e9), .driver_info = DEVTYPE_ITM},
 136 #endif
 137
 138 #ifdef CONFIG_USB_TOUCHSCREEN_ETURBO
 139         {USB_DEVICE(0x1234, 0x5678), .driver_info = DEVTYPE_ETURBO},
 140 #endif
 141
 142 #ifdef CONFIG_USB_TOUCHSCREEN_GUNZE
 143         {USB_DEVICE(0x0637, 0x0001), .driver_info = DEVTYPE_GUNZE},
 144 #endif
 145
 146 #ifdef CONFIG_USB_TOUCHSCREEN_DMC_TSC10
 147         {USB_DEVICE(0x0afa, 0x03e8), .driver_info = DEVTYPE_DMC_TSC10},
 148 #endif
 149
 150         {}
 151 };
 152
 153
 154 /*****************************************************************************
 155  * eGalax part
 156  */
 157
 158 #ifdef CONFIG_USB_TOUCHSCREEN_EGALAX
 159
 160 #define EGALAX_PKT_TYPE_MASK            0xFE
 161 #define EGALAX_PKT_TYPE_REPT            0x80
 162 #define EGALAX_PKT_TYPE_DIAG            0x0A
 163
 164 static int egalax_read_data(unsigned char *pkt, int *x, int *y, int *touch, int *press)
 165 {
 166         if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT)
 167                 return 0;
 168
 169         *x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F);
 170         *y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F);
 171         *touch = pkt[0] & 0x01;
 172
 173         return 1;
 174 }
 175
 176 static int egalax_get_pkt_len(unsigned char *buf, int len)
 177 {
 178         switch (buf[0] & EGALAX_PKT_TYPE_MASK) {
 179         case EGALAX_PKT_TYPE_REPT:
 180                 return 5;
 181
 182         case EGALAX_PKT_TYPE_DIAG:
 183                 if (len < 2)
 184                         return -1;
 185
 186                 return buf[1] + 2;
 187         }
 188
 189         return 0;
 190 }
 191 #endif
 192
 193
 194 /*****************************************************************************
 195  * PanJit Part
 196  */
 197 #ifdef CONFIG_USB_TOUCHSCREEN_PANJIT
 198 static int panjit_read_data(unsigned char *pkt, int *x, int *y, int *touch, int *press)
 199 {
 200         *x = ((pkt[2] & 0x0F) << 8) | pkt[1];
 201         *y = ((pkt[4] & 0x0F) << 8) | pkt[3];
 202         *touch = pkt[0] & 0x01;
 203
 204         return 1;
 205 }
 206 #endif
 207
 208
 209 /*****************************************************************************
 210  * 3M/Microtouch Part
 211  */
 212 #ifdef CONFIG_USB_TOUCHSCREEN_3M
 213
 214 #define MTOUCHUSB_ASYNC_REPORT          1
 215 #define MTOUCHUSB_RESET                 7
 216 #define MTOUCHUSB_REQ_CTRLLR_ID         10
 217
 218 static int mtouch_read_data(unsigned char *pkt, int *x, int *y, int *touch, int *press)
 219 {
 220         *x = (pkt[8] << 8) | pkt[7];
 221         *y = (pkt[10] << 8) | pkt[9];
 222         *touch = (pkt[2] & 0x40) ? 1 : 0;
 223
 224         return 1;
 225 }
 226
 227 static int mtouch_init(struct usbtouch_usb *usbtouch)
 228 {
 229         int ret, i;
 230
 231         ret = usb_control_msg(usbtouch->udev, usb_rcvctrlpipe(usbtouch->udev, 0),
 232                               MTOUCHUSB_RESET,
 233                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 234                               1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
 235         dbg("%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d",
 236             __FUNCTION__, ret);
 237         if (ret < 0)
 238                 return ret;
 239         msleep(150);
 240
 241         for (i = 0; i < 3; i++) {
 242                 ret = usb_control_msg(usbtouch->udev, usb_rcvctrlpipe(usbtouch->udev, 0),
 243                                       MTOUCHUSB_ASYNC_REPORT,
 244                                       USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 245                                       1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT);
 246                 dbg("%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d",
 247                     __FUNCTION__, ret);
 248                 if (ret >= 0)
 249                         break;
 250                 if (ret != -EPIPE)
 251                         return ret;
 252         }
 253
 254         return 0;
 255 }
 256 #endif
 257
 258
 259 /*****************************************************************************
 260  * ITM Part
 261  */
 262 #ifdef CONFIG_USB_TOUCHSCREEN_ITM
 263 static int itm_read_data(unsigned char *pkt, int *x, int *y, int *touch, int *press)
 264 {
 265         *x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F);
 266         *y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F);
 267         *press = ((pkt[2] & 0x01) << 7) | (pkt[5] & 0x7F);
 268         *touch = ~pkt[7] & 0x20;
 269
 270         return *touch;
 271 }
 272 #endif
 273
 274
 275 /*****************************************************************************
 276  * eTurboTouch part
 277  */
 278 #ifdef CONFIG_USB_TOUCHSCREEN_ETURBO
 279 static int eturbo_read_data(unsigned char *pkt, int *x, int *y, int *touch, int *press)
 280 {
 281         unsigned int shift;
 282
 283         /* packets should start with sync */
 284         if (!(pkt[0] & 0x80))
 285                 return 0;
 286
 287         shift = (6 - (pkt[0] & 0x03));
 288         *x = ((pkt[3] << 7) | pkt[4]) >> shift;
 289         *y = ((pkt[1] << 7) | pkt[2]) >> shift;
 290         *touch = (pkt[0] & 0x10) ? 1 : 0;
 291
 292         return 1;
 293 }
 294
 295 static int eturbo_get_pkt_len(unsigned char *buf, int len)
 296 {
 297         if (buf[0] & 0x80)
 298                 return 5;
 299         if (buf[0] == 0x01)
 300                 return 3;
 301         return 0;
 302 }
 303 #endif
 304
 305
 306 /*****************************************************************************
 307  * Gunze part
 308  */
 309 #ifdef CONFIG_USB_TOUCHSCREEN_GUNZE
 310 static int gunze_read_data(unsigned char *pkt, int *x, int *y, int *touch, int *press)
 311 {
 312         if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80))
 313                 return 0;
 314
 315         *x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F);
 316         *y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F);
 317         *touch = pkt[0] & 0x20;
 318
 319         return 1;
 320 }
 321 #endif
 322
 323 /*****************************************************************************
 324  * DMC TSC-10/25 Part
 325  *
 326  * Documentation about the controller and it's protocol can be found at
 327  *   http://www.dmccoltd.com/files/controler/tsc10usb_pi_e.pdf
 328  *   http://www.dmccoltd.com/files/controler/tsc25_usb_e.pdf
 329  */
 330 #ifdef CONFIG_USB_TOUCHSCREEN_DMC_TSC10
 331
 332 /* supported data rates. currently using 130 */
 333 #define TSC10_RATE_POINT        0x50
 334 #define TSC10_RATE_30           0x40
 335 #define TSC10_RATE_50           0x41
 336 #define TSC10_RATE_80           0x42
 337 #define TSC10_RATE_100          0x43
 338 #define TSC10_RATE_130          0x44
 339 #define TSC10_RATE_150          0x45
 340
 341 /* commands */
 342 #define TSC10_CMD_RESET         0x55
 343 #define TSC10_CMD_RATE          0x05
 344 #define TSC10_CMD_DATA1         0x01
 345
 346 static int dmc_tsc10_init(struct usbtouch_usb *usbtouch)
 347 {
 348         struct usb_device *dev = usbtouch->udev;
 349         int ret;
 350         unsigned char buf[2];
 351
 352         /* reset */
 353         buf[0] = buf[1] = 0xFF;
 354         ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
 355                               TSC10_CMD_RESET,
 356                               USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 357                               0, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
 358         if (ret < 0)
 359                 return ret;
 360         if (buf[0] != 0x06 || buf[1] != 0x00)
 361                 return -ENODEV;
 362
 363         /* set coordinate output rate */
 364         buf[0] = buf[1] = 0xFF;
 365         ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
 366                               TSC10_CMD_RATE,
 367                               USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 368                               TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
 369         if (ret < 0)
 370                 return ret;
 371         if (buf[0] != 0x06 || buf[1] != 0x00)
 372                 return -ENODEV;
 373
 374         /* start sending data */
 375         ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
 376                               TSC10_CMD_DATA1,
 377                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 378                               0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
 379         if (ret < 0)
 380                 return ret;
 381
 382         return 0;
 383 }
 384
 385
 386 static int dmc_tsc10_read_data(unsigned char *pkt, int *x, int *y, int *touch, int *press)
 387 {
 388         *x = ((pkt[2] & 0x03) << 8) | pkt[1];
 389         *y = ((pkt[4] & 0x03) << 8) | pkt[3];
 390         *touch = pkt[0] & 0x01;
 391
 392         return 1;
 393 }
 394 #endif
 395
 396
 397 /*****************************************************************************
 398  * the different device descriptors
 399  */
 400 static struct usbtouch_device_info usbtouch_dev_info[] = {
 401 #ifdef CONFIG_USB_TOUCHSCREEN_EGALAX
 402         [DEVTYPE_EGALAX] = {
 403                 .min_xc         = 0x0,
 404                 .max_xc         = 0x07ff,
 405                 .min_yc         = 0x0,
 406                 .max_yc         = 0x07ff,
 407                 .rept_size      = 16,
 408                 .flags          = USBTOUCH_FLG_BUFFER,
 409                 .process_pkt    = usbtouch_process_multi,
 410                 .get_pkt_len    = egalax_get_pkt_len,
 411                 .read_data      = egalax_read_data,
 412         },
 413 #endif
 414
 415 #ifdef CONFIG_USB_TOUCHSCREEN_PANJIT
 416         [DEVTYPE_PANJIT] = {
 417                 .min_xc         = 0x0,
 418                 .max_xc         = 0x0fff,
 419                 .min_yc         = 0x0,
 420                 .max_yc         = 0x0fff,
 421                 .rept_size      = 8,
 422                 .read_data      = panjit_read_data,
 423         },
 424 #endif
 425
 426 #ifdef CONFIG_USB_TOUCHSCREEN_3M
 427         [DEVTYPE_3M] = {
 428                 .min_xc         = 0x0,
 429                 .max_xc         = 0x4000,
 430                 .min_yc         = 0x0,
 431                 .max_yc         = 0x4000,
 432                 .rept_size      = 11,
 433                 .read_data      = mtouch_read_data,
 434                 .init           = mtouch_init,
 435         },
 436 #endif
 437
 438 #ifdef CONFIG_USB_TOUCHSCREEN_ITM
 439         [DEVTYPE_ITM] = {
 440                 .min_xc         = 0x0,
 441                 .max_xc         = 0x0fff,
 442                 .min_yc         = 0x0,
 443                 .max_yc         = 0x0fff,
 444                 .max_press      = 0xff,
 445                 .rept_size      = 8,
 446                 .read_data      = itm_read_data,
 447         },
 448 #endif
 449
 450 #ifdef CONFIG_USB_TOUCHSCREEN_ETURBO
 451         [DEVTYPE_ETURBO] = {
 452                 .min_xc         = 0x0,
 453                 .max_xc         = 0x07ff,
 454                 .min_yc         = 0x0,
 455                 .max_yc         = 0x07ff,
 456                 .rept_size      = 8,
 457                 .flags          = USBTOUCH_FLG_BUFFER,
 458                 .process_pkt    = usbtouch_process_multi,
 459                 .get_pkt_len    = eturbo_get_pkt_len,
 460                 .read_data      = eturbo_read_data,
 461         },
 462 #endif
 463
 464 #ifdef CONFIG_USB_TOUCHSCREEN_GUNZE
 465         [DEVTYPE_GUNZE] = {
 466                 .min_xc         = 0x0,
 467                 .max_xc         = 0x0fff,
 468                 .min_yc         = 0x0,
 469                 .max_yc         = 0x0fff,
 470                 .rept_size      = 4,
 471                 .read_data      = gunze_read_data,
 472         },
 473 #endif
 474
 475 #ifdef CONFIG_USB_TOUCHSCREEN_DMC_TSC10
 476         [DEVTYPE_DMC_TSC10] = {
 477                 .min_xc         = 0x0,
 478                 .max_xc         = 0x03ff,
 479                 .min_yc         = 0x0,
 480                 .max_yc         = 0x03ff,
 481                 .rept_size      = 5,
 482                 .init           = dmc_tsc10_init,
 483                 .read_data      = dmc_tsc10_read_data,
 484         },
 485 #endif
 486 };
 487
 488
 489 /*****************************************************************************
 490  * Generic Part
 491  */
 492 static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
 493                                  unsigned char *pkt, int len)
 494 {
 495         int x, y, touch, press;
 496         struct usbtouch_device_info *type = usbtouch->type;
 497
 498         if (!type->read_data(pkt, &x, &y, &touch, &press))
 499                         return;
 500
 501         input_report_key(usbtouch->input, BTN_TOUCH, touch);
 502
 503         if (swap_xy) {
 504                 input_report_abs(usbtouch->input, ABS_X, y);
 505                 input_report_abs(usbtouch->input, ABS_Y, x);
 506         } else {
 507                 input_report_abs(usbtouch->input, ABS_X, x);
 508                 input_report_abs(usbtouch->input, ABS_Y, y);
 509         }
 510         if (type->max_press)
 511                 input_report_abs(usbtouch->input, ABS_PRESSURE, press);
 512         input_sync(usbtouch->input);
 513 }
 514
 515
 516 #ifdef MULTI_PACKET
 517 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
 518                                    unsigned char *pkt, int len)
 519 {
 520         unsigned char *buffer;
 521         int pkt_len, pos, buf_len, tmp;
 522
 523         /* process buffer */
 524         if (unlikely(usbtouch->buf_len)) {
 525                 /* try to get size */
 526                 pkt_len = usbtouch->type->get_pkt_len(
 527                                 usbtouch->buffer, usbtouch->buf_len);
 528
 529                 /* drop? */
 530                 if (unlikely(!pkt_len))
 531                         goto out_flush_buf;
 532
 533                 /* need to append -pkt_len bytes before able to get size */
 534                 if (unlikely(pkt_len < 0)) {
 535                         int append = -pkt_len;
 536                         if (unlikely(append > len))
 537                                append = len;
 538                         if (usbtouch->buf_len + append >= usbtouch->type->rept_size)
 539                                 goto out_flush_buf;
 540                         memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append);
 541                         usbtouch->buf_len += append;
 542
 543                         pkt_len = usbtouch->type->get_pkt_len(
 544                                         usbtouch->buffer, usbtouch->buf_len);
 545                         if (pkt_len < 0)
 546                                 return;
 547                 }
 548
 549                 /* append */
 550                 tmp = pkt_len - usbtouch->buf_len;
 551                 if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size)
 552                         goto out_flush_buf;
 553                 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp);
 554                 usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len);
 555
 556                 buffer = pkt + tmp;
 557                 buf_len = len - tmp;
 558         } else {
 559                 buffer = pkt;
 560                 buf_len = len;
 561         }
 562
 563         /* loop over the received packet, process */
 564         pos = 0;
 565         while (pos < buf_len) {
 566                 /* get packet len */
 567                 pkt_len = usbtouch->type->get_pkt_len(buffer + pos, len);
 568
 569                 /* unknown packet: drop everything */
 570                 if (unlikely(!pkt_len))
 571                         goto out_flush_buf;
 572
 573                 /* full packet: process */
 574                 if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) {
 575                         usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len);
 576                 } else {
 577                         /* incomplete packet: save in buffer */
 578                         memcpy(usbtouch->buffer, buffer + pos, buf_len - pos);
 579                         usbtouch->buf_len = buf_len - pos;
 580                         return;
 581                 }
 582                 pos += pkt_len;
 583         }
 584
 585 out_flush_buf:
 586         usbtouch->buf_len = 0;
 587         return;
 588 }
 589 #endif
 590
 591
 592 static void usbtouch_irq(struct urb *urb)
 593 {
 594         struct usbtouch_usb *usbtouch = urb->context;
 595         int retval;
 596
 597         switch (urb->status) {
 598         case 0:
 599                 /* success */
 600                 break;
 601         case -ETIME:
 602                 /* this urb is timing out */
 603                 dbg("%s - urb timed out - was the device unplugged?",
 604                     __FUNCTION__);
 605                 return;
 606         case -ECONNRESET:
 607         case -ENOENT:
 608         case -ESHUTDOWN:
 609                 /* this urb is terminated, clean up */
 610                 dbg("%s - urb shutting down with status: %d",
 611                     __FUNCTION__, urb->status);
 612                 return;
 613         default:
 614                 dbg("%s - nonzero urb status received: %d",
 615                     __FUNCTION__, urb->status);
 616                 goto exit;
 617         }
 618
 619         usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length);
 620
 621 exit:
 622         retval = usb_submit_urb(urb, GFP_ATOMIC);
 623         if (retval)
 624                 err("%s - usb_submit_urb failed with result: %d",
 625                     __FUNCTION__, retval);
 626 }
 627
 628 static int usbtouch_open(struct input_dev *input)
 629 {
 630         struct usbtouch_usb *usbtouch = input->private;
 631
 632         usbtouch->irq->dev = usbtouch->udev;
 633
 634         if (usb_submit_urb(usbtouch->irq, GFP_KERNEL))
 635                 return -EIO;
 636
 637         return 0;
 638 }
 639
 640 static void usbtouch_close(struct input_dev *input)
 641 {
 642         struct usbtouch_usb *usbtouch = input->private;
 643
 644         usb_kill_urb(usbtouch->irq);
 645 }
 646
 647
 648 static void usbtouch_free_buffers(struct usb_device *udev,
 649                                   struct usbtouch_usb *usbtouch)
 650 {
 651         if (usbtouch->data)
 652                 usb_buffer_free(udev, usbtouch->type->rept_size,
 653                                 usbtouch->data, usbtouch->data_dma);
 654         kfree(usbtouch->buffer);
 655 }
 656
 657
 658 static int usbtouch_probe(struct usb_interface *intf,
 659                           const struct usb_device_id *id)
 660 {
 661         struct usbtouch_usb *usbtouch;
 662         struct input_dev *input_dev;
 663         struct usb_host_interface *interface;
 664         struct usb_endpoint_descriptor *endpoint;
 665         struct usb_device *udev = interface_to_usbdev(intf);
 666         struct usbtouch_device_info *type;
 667         int err = -ENOMEM;
 668
 669         interface = intf->cur_altsetting;
 670         endpoint = &interface->endpoint[0].desc;
 671
 672         usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL);
 673         input_dev = input_allocate_device();
 674         if (!usbtouch || !input_dev)
 675                 goto out_free;
 676
 677         type = &usbtouch_dev_info[id->driver_info];
 678         usbtouch->type = type;
 679         if (!type->process_pkt)
 680                 type->process_pkt = usbtouch_process_pkt;
 681
 682         usbtouch->data = usb_buffer_alloc(udev, type->rept_size,
 683                                           GFP_KERNEL, &usbtouch->data_dma);
 684         if (!usbtouch->data)
 685                 goto out_free;
 686
 687         if (type->flags & USBTOUCH_FLG_BUFFER) {
 688                 usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL);
 689                 if (!usbtouch->buffer)
 690                         goto out_free_buffers;
 691         }
 692
 693         usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
 694         if (!usbtouch->irq) {
 695                 dbg("%s - usb_alloc_urb failed: usbtouch->irq", __FUNCTION__);
 696                 goto out_free_buffers;
 697         }
 698
 699         usbtouch->udev = udev;
 700         usbtouch->input = input_dev;
 701
 702         if (udev->manufacturer)
 703                 strlcpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name));
 704
 705         if (udev->product) {
 706                 if (udev->manufacturer)
 707                         strlcat(usbtouch->name, " ", sizeof(usbtouch->name));
 708                 strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name));
 709         }
 710
 711         if (!strlen(usbtouch->name))
 712                 snprintf(usbtouch->name, sizeof(usbtouch->name),
 713                         "USB Touchscreen %04x:%04x",
 714                          le16_to_cpu(udev->descriptor.idVendor),
 715                          le16_to_cpu(udev->descriptor.idProduct));
 716
 717         usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys));
 718         strlcpy(usbtouch->phys, "/input0", sizeof(usbtouch->phys));
 719
 720         input_dev->name = usbtouch->name;
 721         input_dev->phys = usbtouch->phys;
 722         usb_to_input_id(udev, &input_dev->id);
 723         input_dev->cdev.dev = &intf->dev;
 724         input_dev->private = usbtouch;
 725         input_dev->open = usbtouch_open;
 726         input_dev->close = usbtouch_close;
 727
 728         input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
 729         input_dev->keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH);
 730         input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0);
 731         input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0);
 732         if (type->max_press)
 733                 input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press,
 734                                      type->max_press, 0, 0);
 735
 736         usb_fill_int_urb(usbtouch->irq, usbtouch->udev,
 737                          usb_rcvintpipe(usbtouch->udev, endpoint->bEndpointAddress),
 738                          usbtouch->data, type->rept_size,
 739                          usbtouch_irq, usbtouch, endpoint->bInterval);
 740
 741         usbtouch->irq->dev = usbtouch->udev;
 742         usbtouch->irq->transfer_dma = usbtouch->data_dma;
 743         usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 744
 745         /* device specific init */
 746         if (type->init) {
 747                 err = type->init(usbtouch);
 748                 if (err) {
 749                         dbg("%s - type->init() failed, err: %d", __FUNCTION__, err);
 750                         goto out_free_buffers;
 751                 }
 752         }
 753
 754         err = input_register_device(usbtouch->input);
 755         if (err) {
 756                 dbg("%s - input_register_device failed, err: %d", __FUNCTION__, err);
 757                 goto out_free_buffers;
 758         }
 759
 760         usb_set_intfdata(intf, usbtouch);
 761
 762         return 0;
 763
 764 out_free_buffers:
 765         usbtouch_free_buffers(udev, usbtouch);
 766 out_free:
 767         input_free_device(input_dev);
 768         kfree(usbtouch);
 769         return err;
 770 }
 771
 772 static void usbtouch_disconnect(struct usb_interface *intf)
 773 {
 774         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
 775
 776         dbg("%s - called", __FUNCTION__);
 777
 778         if (!usbtouch)
 779                 return;
 780
 781         dbg("%s - usbtouch is initialized, cleaning up", __FUNCTION__);
 782         usb_set_intfdata(intf, NULL);
 783         usb_kill_urb(usbtouch->irq);
 784         input_unregister_device(usbtouch->input);
 785         usb_free_urb(usbtouch->irq);
 786         usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch);
 787         kfree(usbtouch);
 788 }
 789
 790 MODULE_DEVICE_TABLE(usb, usbtouch_devices);
 791
 792 static struct usb_driver usbtouch_driver = {
 793         .name           = "usbtouchscreen",
 794         .probe          = usbtouch_probe,
 795         .disconnect     = usbtouch_disconnect,
 796         .id_table       = usbtouch_devices,
 797 };
 798
 799 static int __init usbtouch_init(void)
 800 {
 801         return usb_register(&usbtouch_driver);
 802 }
 803
 804 static void __exit usbtouch_cleanup(void)
 805 {
 806         usb_deregister(&usbtouch_driver);
 807 }
 808
 809 module_init(usbtouch_init);
 810 module_exit(usbtouch_cleanup);
 811
 812 MODULE_AUTHOR(DRIVER_AUTHOR);
 813 MODULE_DESCRIPTION(DRIVER_DESC);
 814 MODULE_LICENSE("GPL");
 815
 816 MODULE_ALIAS("touchkitusb");
 817 MODULE_ALIAS("itmtouch");
 818 MODULE_ALIAS("mtouchusb");