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