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  *
  12  * Copyright (C) 2004-2006 by Daniel Ritz <daniel.ritz@gmx.ch>
  13  * Copyright (C) by Todd E. Johnson (mtouchusb.c)
  14  *
  15  * This program is free software; you can redistribute it and/or
  16  * modify it under the terms of the GNU General Public License as
  17  * published by the Free Software Foundation; either version 2 of the
  18  * License, or (at your option) any later version.
  19  *
  20  * This program is distributed in the hope that it will be useful, but
  21  * WITHOUT ANY WARRANTY; without even the implied warranty of
  22  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  23  * General Public License for more details.
  24  *
  25  * You should have received a copy of the GNU General Public License
  26  * along with this program; if not, write to the Free Software
  27  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  28  *
  29  * Driver is based on touchkitusb.c
  30  * - ITM parts are from itmtouch.c
  31  * - 3M parts are from mtouchusb.c
  32  * - PanJit parts are from an unmerged driver by Lanslott Gish
  33  *
  34  *****************************************************************************/
  35
  36 //#define DEBUG
  37
  38 #include <linux/config.h>
  39 #include <linux/kernel.h>
  40 #include <linux/slab.h>
  41 #include <linux/input.h>
  42 #include <linux/module.h>
  43 #include <linux/init.h>
  44 #include <linux/usb.h>
  45 #include <linux/usb/input.h>
  46
  47
  48 #define DRIVER_VERSION          "v0.4"
  49 #define DRIVER_AUTHOR           "Daniel Ritz <daniel.ritz@gmx.ch>"
  50 #define DRIVER_DESC             "USB Touchscreen Driver"
  51
  52 static int swap_xy;
  53 module_param(swap_xy, bool, 0644);
  54 MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");
  55
  56 /* device specifc data/functions */
  57 struct usbtouch_usb;
  58 struct usbtouch_device_info {
  59         int min_xc, max_xc;
  60         int min_yc, max_yc;
  61         int min_press, max_press;
  62         int rept_size;
  63         int flags;
  64
  65         void (*process_pkt) (struct usbtouch_usb *usbtouch, struct pt_regs *regs, unsigned char *pkt, int len);
  66         int  (*get_pkt_len) (unsigned char *pkt, int len);
  67         int  (*read_data)   (unsigned char *pkt, int *x, int *y, int *touch, int *press);
  68         int  (*init)        (struct usbtouch_usb *usbtouch);
  69 };
  70
  71 #define USBTOUCH_FLG_BUFFER     0x01
  72
  73
  74 /* a usbtouch device */
  75 struct usbtouch_usb {
  76         unsigned char *data;
  77         dma_addr_t data_dma;
  78         unsigned char *buffer;
  79         int buf_len;
  80         struct urb *irq;
  81         struct usb_device *udev;
  82         struct input_dev *input;
  83         struct usbtouch_device_info *type;
  84         char name[128];
  85         char phys[64];
  86 };
  87
  88
  89 #if defined(CONFIG_USB_TOUCHSCREEN_EGALAX) || defined(CONFIG_USB_TOUCHSCREEN_ETURBO)
  90 #define MULTI_PACKET
  91 #endif
  92
  93 #ifdef MULTI_PACKET
  94 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
  95                                    struct pt_regs *regs,
  96                                    unsigned char *pkt, int len);
  97 #endif
  98
  99 /* device types */
 100 enum {
 101         DEVTPYE_DUMMY = -1,
 102         DEVTYPE_EGALAX,
 103         DEVTYPE_PANJIT,
 104         DEVTYPE_3M,
 105         DEVTYPE_ITM,
 106         DEVTYPE_ETURBO,
 107         DEVTYPE_GUNZE,
 108 };
 109
 110 static struct usb_device_id usbtouch_devices[] = {
 111 #ifdef CONFIG_USB_TOUCHSCREEN_EGALAX
 112         {USB_DEVICE(0x3823, 0x0001), .driver_info = DEVTYPE_EGALAX},
 113         {USB_DEVICE(0x3823, 0x0002), .driver_info = DEVTYPE_EGALAX},
 114         {USB_DEVICE(0x0123, 0x0001), .driver_info = DEVTYPE_EGALAX},
 115         {USB_DEVICE(0x0eef, 0x0001), .driver_info = DEVTYPE_EGALAX},
 116         {USB_DEVICE(0x0eef, 0x0002), .driver_info = DEVTYPE_EGALAX},
 117         {USB_DEVICE(0x1234, 0x0001), .driver_info = DEVTYPE_EGALAX},
 118         {USB_DEVICE(0x1234, 0x0002), .driver_info = DEVTYPE_EGALAX},
 119 #endif
 120
 121 #ifdef CONFIG_USB_TOUCHSCREEN_PANJIT
 122         {USB_DEVICE(0x134c, 0x0001), .driver_info = DEVTYPE_PANJIT},
 123         {USB_DEVICE(0x134c, 0x0002), .driver_info = DEVTYPE_PANJIT},
 124         {USB_DEVICE(0x134c, 0x0003), .driver_info = DEVTYPE_PANJIT},
 125         {USB_DEVICE(0x134c, 0x0004), .driver_info = DEVTYPE_PANJIT},
 126 #endif
 127
 128 #ifdef CONFIG_USB_TOUCHSCREEN_3M
 129         {USB_DEVICE(0x0596, 0x0001), .driver_info = DEVTYPE_3M},
 130 #endif
 131
 132 #ifdef CONFIG_USB_TOUCHSCREEN_ITM
 133         {USB_DEVICE(0x0403, 0xf9e9), .driver_info = DEVTYPE_ITM},
 134 #endif
 135
 136 #ifdef CONFIG_USB_TOUCHSCREEN_ETURBO
 137         {USB_DEVICE(0x1234, 0x5678), .driver_info = DEVTYPE_ETURBO},
 138 #endif
 139
 140 #ifdef CONFIG_USB_TOUCHSCREEN_GUNZE
 141         {USB_DEVICE(0x0637, 0x0001), .driver_info = DEVTYPE_GUNZE},
 142 #endif
 143
 144         {}
 145 };
 146
 147
 148 /*****************************************************************************
 149  * eGalax part
 150  */
 151
 152 #ifdef CONFIG_USB_TOUCHSCREEN_EGALAX
 153
 154 #define EGALAX_PKT_TYPE_MASK            0xFE
 155 #define EGALAX_PKT_TYPE_REPT            0x80
 156 #define EGALAX_PKT_TYPE_DIAG            0x0A
 157
 158 static int egalax_read_data(unsigned char *pkt, int *x, int *y, int *touch, int *press)
 159 {
 160         if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT)
 161                 return 0;
 162
 163         *x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F);
 164         *y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F);
 165         *touch = pkt[0] & 0x01;
 166
 167         return 1;
 168 }
 169
 170 static int egalax_get_pkt_len(unsigned char *buf, int len)
 171 {
 172         switch (buf[0] & EGALAX_PKT_TYPE_MASK) {
 173         case EGALAX_PKT_TYPE_REPT:
 174                 return 5;
 175
 176         case EGALAX_PKT_TYPE_DIAG:
 177                 if (len < 2)
 178                         return -1;
 179
 180                 return buf[1] + 2;
 181         }
 182
 183         return 0;
 184 }
 185 #endif
 186
 187
 188 /*****************************************************************************
 189  * PanJit Part
 190  */
 191 #ifdef CONFIG_USB_TOUCHSCREEN_PANJIT
 192 static int panjit_read_data(unsigned char *pkt, int *x, int *y, int *touch, int *press)
 193 {
 194         *x = ((pkt[2] & 0x0F) << 8) | pkt[1];
 195         *y = ((pkt[4] & 0x0F) << 8) | pkt[3];
 196         *touch = pkt[0] & 0x01;
 197
 198         return 1;
 199 }
 200 #endif
 201
 202
 203 /*****************************************************************************
 204  * 3M/Microtouch Part
 205  */
 206 #ifdef CONFIG_USB_TOUCHSCREEN_3M
 207
 208 #define MTOUCHUSB_ASYNC_REPORT          1
 209 #define MTOUCHUSB_RESET                 7
 210 #define MTOUCHUSB_REQ_CTRLLR_ID         10
 211
 212 static int mtouch_read_data(unsigned char *pkt, int *x, int *y, int *touch, int *press)
 213 {
 214         *x = (pkt[8] << 8) | pkt[7];
 215         *y = (pkt[10] << 8) | pkt[9];
 216         *touch = (pkt[2] & 0x40) ? 1 : 0;
 217
 218         return 1;
 219 }
 220
 221 static int mtouch_init(struct usbtouch_usb *usbtouch)
 222 {
 223         int ret, i;
 224
 225         ret = usb_control_msg(usbtouch->udev, usb_rcvctrlpipe(usbtouch->udev, 0),
 226                               MTOUCHUSB_RESET,
 227                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 228                               1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
 229         dbg("%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d",
 230             __FUNCTION__, ret);
 231         if (ret < 0)
 232                 return ret;
 233         msleep(150);
 234
 235         for (i = 0; i < 3; i++) {
 236                 ret = usb_control_msg(usbtouch->udev, usb_rcvctrlpipe(usbtouch->udev, 0),
 237                                       MTOUCHUSB_ASYNC_REPORT,
 238                                       USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 239                                       1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT);
 240                 dbg("%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d",
 241                     __FUNCTION__, ret);
 242                 if (ret >= 0)
 243                         break;
 244                 if (ret != -EPIPE)
 245                         return ret;
 246         }
 247
 248         return 0;
 249 }
 250 #endif
 251
 252
 253 /*****************************************************************************
 254  * ITM Part
 255  */
 256 #ifdef CONFIG_USB_TOUCHSCREEN_ITM
 257 static int itm_read_data(unsigned char *pkt, int *x, int *y, int *touch, int *press)
 258 {
 259         *x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F);
 260         *y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F);
 261         *press = ((pkt[2] & 0x1F) << 7) | (pkt[5] & 0x7F);
 262         *touch = ~pkt[7] & 0x20;
 263
 264         return 1;
 265 }
 266 #endif
 267
 268
 269 /*****************************************************************************
 270  * eTurboTouch part
 271  */
 272 #ifdef CONFIG_USB_TOUCHSCREEN_ETURBO
 273 static int eturbo_read_data(unsigned char *pkt, int *x, int *y, int *touch, int *press)
 274 {
 275         unsigned int shift;
 276
 277         /* packets should start with sync */
 278         if (!(pkt[0] & 0x80))
 279                 return 0;
 280
 281         shift = (6 - (pkt[0] & 0x03));
 282         *x = ((pkt[3] << 7) | pkt[4]) >> shift;
 283         *y = ((pkt[1] << 7) | pkt[2]) >> shift;
 284         *touch = (pkt[0] & 0x10) ? 1 : 0;
 285
 286         return 1;
 287 }
 288
 289 static int eturbo_get_pkt_len(unsigned char *buf, int len)
 290 {
 291         if (buf[0] & 0x80)
 292                 return 5;
 293         if (buf[0] == 0x01)
 294                 return 3;
 295         return 0;
 296 }
 297 #endif
 298
 299
 300 /*****************************************************************************
 301  * Gunze part
 302  */
 303 #ifdef CONFIG_USB_TOUCHSCREEN_GUNZE
 304 static int gunze_read_data(unsigned char *pkt, int *x, int *y, int *touch, int *press)
 305 {
 306         if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80))
 307                 return 0;
 308
 309         *x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F);
 310         *y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F);
 311         *touch = pkt[0] & 0x20;
 312
 313         return 1;
 314 }
 315 #endif
 316
 317 /*****************************************************************************
 318  * the different device descriptors
 319  */
 320 static struct usbtouch_device_info usbtouch_dev_info[] = {
 321 #ifdef CONFIG_USB_TOUCHSCREEN_EGALAX
 322         [DEVTYPE_EGALAX] = {
 323                 .min_xc         = 0x0,
 324                 .max_xc         = 0x07ff,
 325                 .min_yc         = 0x0,
 326                 .max_yc         = 0x07ff,
 327                 .rept_size      = 16,
 328                 .flags          = USBTOUCH_FLG_BUFFER,
 329                 .process_pkt    = usbtouch_process_multi,
 330                 .get_pkt_len    = egalax_get_pkt_len,
 331                 .read_data      = egalax_read_data,
 332         },
 333 #endif
 334
 335 #ifdef CONFIG_USB_TOUCHSCREEN_PANJIT
 336         [DEVTYPE_PANJIT] = {
 337                 .min_xc         = 0x0,
 338                 .max_xc         = 0x0fff,
 339                 .min_yc         = 0x0,
 340                 .max_yc         = 0x0fff,
 341                 .rept_size      = 8,
 342                 .read_data      = panjit_read_data,
 343         },
 344 #endif
 345
 346 #ifdef CONFIG_USB_TOUCHSCREEN_3M
 347         [DEVTYPE_3M] = {
 348                 .min_xc         = 0x0,
 349                 .max_xc         = 0x4000,
 350                 .min_yc         = 0x0,
 351                 .max_yc         = 0x4000,
 352                 .rept_size      = 11,
 353                 .read_data      = mtouch_read_data,
 354                 .init           = mtouch_init,
 355         },
 356 #endif
 357
 358 #ifdef CONFIG_USB_TOUCHSCREEN_ITM
 359         [DEVTYPE_ITM] = {
 360                 .min_xc         = 0x0,
 361                 .max_xc         = 0x0fff,
 362                 .min_yc         = 0x0,
 363                 .max_yc         = 0x0fff,
 364                 .max_press      = 0xff,
 365                 .rept_size      = 8,
 366                 .read_data      = itm_read_data,
 367         },
 368 #endif
 369
 370 #ifdef CONFIG_USB_TOUCHSCREEN_ETURBO
 371         [DEVTYPE_ETURBO] = {
 372                 .min_xc         = 0x0,
 373                 .max_xc         = 0x07ff,
 374                 .min_yc         = 0x0,
 375                 .max_yc         = 0x07ff,
 376                 .rept_size      = 8,
 377                 .flags          = USBTOUCH_FLG_BUFFER,
 378                 .process_pkt    = usbtouch_process_multi,
 379                 .get_pkt_len    = eturbo_get_pkt_len,
 380                 .read_data      = eturbo_read_data,
 381         },
 382 #endif
 383
 384 #ifdef CONFIG_USB_TOUCHSCREEN_GUNZE
 385         [DEVTYPE_GUNZE] = {
 386                 .min_xc         = 0x0,
 387                 .max_xc         = 0x0fff,
 388                 .min_yc         = 0x0,
 389                 .max_yc         = 0x0fff,
 390                 .rept_size      = 4,
 391                 .read_data      = gunze_read_data,
 392         },
 393 #endif
 394 };
 395
 396
 397 /*****************************************************************************
 398  * Generic Part
 399  */
 400 static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
 401                                  struct pt_regs *regs, unsigned char *pkt, int len)
 402 {
 403         int x, y, touch, press;
 404         struct usbtouch_device_info *type = usbtouch->type;
 405
 406         if (!type->read_data(pkt, &x, &y, &touch, &press))
 407                         return;
 408
 409         input_regs(usbtouch->input, regs);
 410         input_report_key(usbtouch->input, BTN_TOUCH, touch);
 411
 412         if (swap_xy) {
 413                 input_report_abs(usbtouch->input, ABS_X, y);
 414                 input_report_abs(usbtouch->input, ABS_Y, x);
 415         } else {
 416                 input_report_abs(usbtouch->input, ABS_X, x);
 417                 input_report_abs(usbtouch->input, ABS_Y, y);
 418         }
 419         if (type->max_press)
 420                 input_report_abs(usbtouch->input, ABS_PRESSURE, press);
 421         input_sync(usbtouch->input);
 422 }
 423
 424
 425 #ifdef MULTI_PACKET
 426 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
 427                                    struct pt_regs *regs,
 428                                    unsigned char *pkt, int len)
 429 {
 430         unsigned char *buffer;
 431         int pkt_len, pos, buf_len, tmp;
 432
 433         /* process buffer */
 434         if (unlikely(usbtouch->buf_len)) {
 435                 /* try to get size */
 436                 pkt_len = usbtouch->type->get_pkt_len(
 437                                 usbtouch->buffer, usbtouch->buf_len);
 438
 439                 /* drop? */
 440                 if (unlikely(!pkt_len))
 441                         goto out_flush_buf;
 442
 443                 /* need to append -pkt_len bytes before able to get size */
 444                 if (unlikely(pkt_len < 0)) {
 445                         int append = -pkt_len;
 446                         if (unlikely(append > len))
 447                                append = len;
 448                         if (usbtouch->buf_len + append >= usbtouch->type->rept_size)
 449                                 goto out_flush_buf;
 450                         memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append);
 451                         usbtouch->buf_len += append;
 452
 453                         pkt_len = usbtouch->type->get_pkt_len(
 454                                         usbtouch->buffer, usbtouch->buf_len);
 455                         if (pkt_len < 0)
 456                                 return;
 457                 }
 458
 459                 /* append */
 460                 tmp = pkt_len - usbtouch->buf_len;
 461                 if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size)
 462                         goto out_flush_buf;
 463                 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp);
 464                 usbtouch_process_pkt(usbtouch, regs, usbtouch->buffer, pkt_len);
 465
 466                 buffer = pkt + tmp;
 467                 buf_len = len - tmp;
 468         } else {
 469                 buffer = pkt;
 470                 buf_len = len;
 471         }
 472
 473         /* loop over the received packet, process */
 474         pos = 0;
 475         while (pos < buf_len) {
 476                 /* get packet len */
 477                 pkt_len = usbtouch->type->get_pkt_len(buffer + pos, len);
 478
 479                 /* unknown packet: drop everything */
 480                 if (unlikely(!pkt_len))
 481                         goto out_flush_buf;
 482
 483                 /* full packet: process */
 484                 if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) {
 485                         usbtouch_process_pkt(usbtouch, regs, buffer + pos, pkt_len);
 486                 } else {
 487                         /* incomplete packet: save in buffer */
 488                         memcpy(usbtouch->buffer, buffer + pos, buf_len - pos);
 489                         usbtouch->buf_len = buf_len - pos;
 490                         return;
 491                 }
 492                 pos += pkt_len;
 493         }
 494
 495 out_flush_buf:
 496         usbtouch->buf_len = 0;
 497         return;
 498 }
 499 #endif
 500
 501
 502 static void usbtouch_irq(struct urb *urb, struct pt_regs *regs)
 503 {
 504         struct usbtouch_usb *usbtouch = urb->context;
 505         int retval;
 506
 507         switch (urb->status) {
 508         case 0:
 509                 /* success */
 510                 break;
 511         case -ETIME:
 512                 /* this urb is timing out */
 513                 dbg("%s - urb timed out - was the device unplugged?",
 514                     __FUNCTION__);
 515                 return;
 516         case -ECONNRESET:
 517         case -ENOENT:
 518         case -ESHUTDOWN:
 519                 /* this urb is terminated, clean up */
 520                 dbg("%s - urb shutting down with status: %d",
 521                     __FUNCTION__, urb->status);
 522                 return;
 523         default:
 524                 dbg("%s - nonzero urb status received: %d",
 525                     __FUNCTION__, urb->status);
 526                 goto exit;
 527         }
 528
 529         usbtouch->type->process_pkt(usbtouch, regs, usbtouch->data, urb->actual_length);
 530
 531 exit:
 532         retval = usb_submit_urb(urb, GFP_ATOMIC);
 533         if (retval)
 534                 err("%s - usb_submit_urb failed with result: %d",
 535                     __FUNCTION__, retval);
 536 }
 537
 538 static int usbtouch_open(struct input_dev *input)
 539 {
 540         struct usbtouch_usb *usbtouch = input->private;
 541
 542         usbtouch->irq->dev = usbtouch->udev;
 543
 544         if (usb_submit_urb(usbtouch->irq, GFP_KERNEL))
 545                 return -EIO;
 546
 547         return 0;
 548 }
 549
 550 static void usbtouch_close(struct input_dev *input)
 551 {
 552         struct usbtouch_usb *usbtouch = input->private;
 553
 554         usb_kill_urb(usbtouch->irq);
 555 }
 556
 557
 558 static void usbtouch_free_buffers(struct usb_device *udev,
 559                                   struct usbtouch_usb *usbtouch)
 560 {
 561         if (usbtouch->data)
 562                 usb_buffer_free(udev, usbtouch->type->rept_size,
 563                                 usbtouch->data, usbtouch->data_dma);
 564         kfree(usbtouch->buffer);
 565 }
 566
 567
 568 static int usbtouch_probe(struct usb_interface *intf,
 569                           const struct usb_device_id *id)
 570 {
 571         struct usbtouch_usb *usbtouch;
 572         struct input_dev *input_dev;
 573         struct usb_host_interface *interface;
 574         struct usb_endpoint_descriptor *endpoint;
 575         struct usb_device *udev = interface_to_usbdev(intf);
 576         struct usbtouch_device_info *type;
 577         int err = -ENOMEM;
 578
 579         interface = intf->cur_altsetting;
 580         endpoint = &interface->endpoint[0].desc;
 581
 582         usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL);
 583         input_dev = input_allocate_device();
 584         if (!usbtouch || !input_dev)
 585                 goto out_free;
 586
 587         type = &usbtouch_dev_info[id->driver_info];
 588         usbtouch->type = type;
 589         if (!type->process_pkt)
 590                 type->process_pkt = usbtouch_process_pkt;
 591
 592         usbtouch->data = usb_buffer_alloc(udev, type->rept_size,
 593                                           SLAB_KERNEL, &usbtouch->data_dma);
 594         if (!usbtouch->data)
 595                 goto out_free;
 596
 597         if (type->flags & USBTOUCH_FLG_BUFFER) {
 598                 usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL);
 599                 if (!usbtouch->buffer)
 600                         goto out_free_buffers;
 601         }
 602
 603         usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
 604         if (!usbtouch->irq) {
 605                 dbg("%s - usb_alloc_urb failed: usbtouch->irq", __FUNCTION__);
 606                 goto out_free_buffers;
 607         }
 608
 609         usbtouch->udev = udev;
 610         usbtouch->input = input_dev;
 611
 612         if (udev->manufacturer)
 613                 strlcpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name));
 614
 615         if (udev->product) {
 616                 if (udev->manufacturer)
 617                         strlcat(usbtouch->name, " ", sizeof(usbtouch->name));
 618                 strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name));
 619         }
 620
 621         if (!strlen(usbtouch->name))
 622                 snprintf(usbtouch->name, sizeof(usbtouch->name),
 623                         "USB Touchscreen %04x:%04x",
 624                          le16_to_cpu(udev->descriptor.idVendor),
 625                          le16_to_cpu(udev->descriptor.idProduct));
 626
 627         usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys));
 628         strlcpy(usbtouch->phys, "/input0", sizeof(usbtouch->phys));
 629
 630         input_dev->name = usbtouch->name;
 631         input_dev->phys = usbtouch->phys;
 632         usb_to_input_id(udev, &input_dev->id);
 633         input_dev->cdev.dev = &intf->dev;
 634         input_dev->private = usbtouch;
 635         input_dev->open = usbtouch_open;
 636         input_dev->close = usbtouch_close;
 637
 638         input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
 639         input_dev->keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH);
 640         input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0);
 641         input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0);
 642         if (type->max_press)
 643                 input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press,
 644                                      type->max_press, 0, 0);
 645
 646         usb_fill_int_urb(usbtouch->irq, usbtouch->udev,
 647                          usb_rcvintpipe(usbtouch->udev, 0x81),
 648                          usbtouch->data, type->rept_size,
 649                          usbtouch_irq, usbtouch, endpoint->bInterval);
 650
 651         usbtouch->irq->dev = usbtouch->udev;
 652         usbtouch->irq->transfer_dma = usbtouch->data_dma;
 653         usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 654
 655         /* device specific init */
 656         if (type->init) {
 657                 err = type->init(usbtouch);
 658                 if (err) {
 659                         dbg("%s - type->init() failed, err: %d", __FUNCTION__, err);
 660                         goto out_free_buffers;
 661                 }
 662         }
 663
 664         err = input_register_device(usbtouch->input);
 665         if (err) {
 666                 dbg("%s - input_register_device failed, err: %d", __FUNCTION__, err);
 667                 goto out_free_buffers;
 668         }
 669
 670         usb_set_intfdata(intf, usbtouch);
 671
 672         return 0;
 673
 674 out_free_buffers:
 675         usbtouch_free_buffers(udev, usbtouch);
 676 out_free:
 677         input_free_device(input_dev);
 678         kfree(usbtouch);
 679         return err;
 680 }
 681
 682 static void usbtouch_disconnect(struct usb_interface *intf)
 683 {
 684         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
 685
 686         dbg("%s - called", __FUNCTION__);
 687
 688         if (!usbtouch)
 689                 return;
 690
 691         dbg("%s - usbtouch is initialized, cleaning up", __FUNCTION__);
 692         usb_set_intfdata(intf, NULL);
 693         usb_kill_urb(usbtouch->irq);
 694         input_unregister_device(usbtouch->input);
 695         usb_free_urb(usbtouch->irq);
 696         usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch);
 697         kfree(usbtouch);
 698 }
 699
 700 MODULE_DEVICE_TABLE(usb, usbtouch_devices);
 701
 702 static struct usb_driver usbtouch_driver = {
 703         .name           = "usbtouchscreen",
 704         .probe          = usbtouch_probe,
 705         .disconnect     = usbtouch_disconnect,
 706         .id_table       = usbtouch_devices,
 707 };
 708
 709 static int __init usbtouch_init(void)
 710 {
 711         return usb_register(&usbtouch_driver);
 712 }
 713
 714 static void __exit usbtouch_cleanup(void)
 715 {
 716         usb_deregister(&usbtouch_driver);
 717 }
 718
 719 module_init(usbtouch_init);
 720 module_exit(usbtouch_cleanup);
 721
 722 MODULE_AUTHOR(DRIVER_AUTHOR);
 723 MODULE_DESCRIPTION(DRIVER_DESC);
 724 MODULE_LICENSE("GPL");
 725
 726 MODULE_ALIAS("touchkitusb");
 727 MODULE_ALIAS("itmtouch");
 728 MODULE_ALIAS("mtouchusb");