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