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 * - General Touch 15 * - GoTop Super_Q2/GogoPen/PenPower tablets 16 * 17 * Copyright (C) 2004-2007 by Daniel Ritz <daniel.ritz@gmx.ch> 18 * Copyright (C) by Todd E. Johnson (mtouchusb.c) 19 * 20 * This program is free software; you can redistribute it and/or 21 * modify it under the terms of the GNU General Public License as 22 * published by the Free Software Foundation; either version 2 of the 23 * License, or (at your option) any later version. 24 * 25 * This program is distributed in the hope that it will be useful, but 26 * WITHOUT ANY WARRANTY; without even the implied warranty of 27 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 28 * General Public License for more details. 29 * 30 * You should have received a copy of the GNU General Public License 31 * along with this program; if not, write to the Free Software 32 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 33 * 34 * Driver is based on touchkitusb.c 35 * - ITM parts are from itmtouch.c 36 * - 3M parts are from mtouchusb.c 37 * - PanJit parts are from an unmerged driver by Lanslott Gish 38 * - DMC TSC 10/25 are from Holger Schurig, with ideas from an unmerged 39 * driver from Marius Vollmer 40 * 41 *****************************************************************************/ 42 43 //#define DEBUG 44 45 #include <linux/kernel.h> 46 #include <linux/slab.h> 47 #include <linux/input.h> 48 #include <linux/module.h> 49 #include <linux/init.h> 50 #include <linux/usb.h> 51 #include <linux/usb/input.h> 52 #include <linux/hid.h> 53 54 55 #define DRIVER_VERSION "v0.6" 56 #define DRIVER_AUTHOR "Daniel Ritz <daniel.ritz@gmx.ch>" 57 #define DRIVER_DESC "USB Touchscreen Driver" 58 59 static int swap_xy; 60 module_param(swap_xy, bool, 0644); 61 MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped."); 62 63 static int hwcalib_xy; 64 module_param(hwcalib_xy, bool, 0644); 65 MODULE_PARM_DESC(hwcalib_xy, "If set hw-calibrated X/Y are used if available"); 66 67 /* device specifc data/functions */ 68 struct usbtouch_usb; 69 struct usbtouch_device_info { 70 int min_xc, max_xc; 71 int min_yc, max_yc; 72 int min_press, max_press; 73 int rept_size; 74 75 void (*process_pkt) (struct usbtouch_usb *usbtouch, unsigned char *pkt, int len); 76 77 /* 78 * used to get the packet len. possible return values: 79 * > 0: packet len 80 * = 0: skip one byte 81 * < 0: -return value more bytes needed 82 */ 83 int (*get_pkt_len) (unsigned char *pkt, int len); 84 85 int (*read_data) (struct usbtouch_usb *usbtouch, unsigned char *pkt); 86 int (*init) (struct usbtouch_usb *usbtouch); 87 }; 88 89 /* a usbtouch device */ 90 struct usbtouch_usb { 91 unsigned char *data; 92 dma_addr_t data_dma; 93 unsigned char *buffer; 94 int buf_len; 95 struct urb *irq; 96 struct usb_device *udev; 97 struct input_dev *input; 98 struct usbtouch_device_info *type; 99 char name[128]; 100 char phys[64]; 101 102 int x, y; 103 int touch, press; 104 }; 105 106 107 /* device types */ 108 enum { 109 DEVTYPE_IGNORE = -1, 110 DEVTYPE_EGALAX, 111 DEVTYPE_PANJIT, 112 DEVTYPE_3M, 113 DEVTYPE_ITM, 114 DEVTYPE_ETURBO, 115 DEVTYPE_GUNZE, 116 DEVTYPE_DMC_TSC10, 117 DEVTYPE_IRTOUCH, 118 DEVTYPE_IDEALTEK, 119 DEVTYPE_GENERAL_TOUCH, 120 DEVTYPE_GOTOP, 121 }; 122 123 #define USB_DEVICE_HID_CLASS(vend, prod) \ 124 .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS \ 125 | USB_DEVICE_ID_MATCH_INT_PROTOCOL \ 126 | USB_DEVICE_ID_MATCH_DEVICE, \ 127 .idVendor = (vend), \ 128 .idProduct = (prod), \ 129 .bInterfaceClass = USB_INTERFACE_CLASS_HID, \ 130 .bInterfaceProtocol = USB_INTERFACE_PROTOCOL_MOUSE 131 132 static struct usb_device_id usbtouch_devices[] = { 133 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX 134 /* ignore the HID capable devices, handled by usbhid */ 135 {USB_DEVICE_HID_CLASS(0x0eef, 0x0001), .driver_info = DEVTYPE_IGNORE}, 136 {USB_DEVICE_HID_CLASS(0x0eef, 0x0002), .driver_info = DEVTYPE_IGNORE}, 137 138 /* normal device IDs */ 139 {USB_DEVICE(0x3823, 0x0001), .driver_info = DEVTYPE_EGALAX}, 140 {USB_DEVICE(0x3823, 0x0002), .driver_info = DEVTYPE_EGALAX}, 141 {USB_DEVICE(0x0123, 0x0001), .driver_info = DEVTYPE_EGALAX}, 142 {USB_DEVICE(0x0eef, 0x0001), .driver_info = DEVTYPE_EGALAX}, 143 {USB_DEVICE(0x0eef, 0x0002), .driver_info = DEVTYPE_EGALAX}, 144 {USB_DEVICE(0x1234, 0x0001), .driver_info = DEVTYPE_EGALAX}, 145 {USB_DEVICE(0x1234, 0x0002), .driver_info = DEVTYPE_EGALAX}, 146 #endif 147 148 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT 149 {USB_DEVICE(0x134c, 0x0001), .driver_info = DEVTYPE_PANJIT}, 150 {USB_DEVICE(0x134c, 0x0002), .driver_info = DEVTYPE_PANJIT}, 151 {USB_DEVICE(0x134c, 0x0003), .driver_info = DEVTYPE_PANJIT}, 152 {USB_DEVICE(0x134c, 0x0004), .driver_info = DEVTYPE_PANJIT}, 153 #endif 154 155 #ifdef CONFIG_TOUCHSCREEN_USB_3M 156 {USB_DEVICE(0x0596, 0x0001), .driver_info = DEVTYPE_3M}, 157 #endif 158 159 #ifdef CONFIG_TOUCHSCREEN_USB_ITM 160 {USB_DEVICE(0x0403, 0xf9e9), .driver_info = DEVTYPE_ITM}, 161 #endif 162 163 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO 164 {USB_DEVICE(0x1234, 0x5678), .driver_info = DEVTYPE_ETURBO}, 165 #endif 166 167 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE 168 {USB_DEVICE(0x0637, 0x0001), .driver_info = DEVTYPE_GUNZE}, 169 #endif 170 171 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10 172 {USB_DEVICE(0x0afa, 0x03e8), .driver_info = DEVTYPE_DMC_TSC10}, 173 #endif 174 175 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH 176 {USB_DEVICE(0x595a, 0x0001), .driver_info = DEVTYPE_IRTOUCH}, 177 {USB_DEVICE(0x6615, 0x0001), .driver_info = DEVTYPE_IRTOUCH}, 178 #endif 179 180 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK 181 {USB_DEVICE(0x1391, 0x1000), .driver_info = DEVTYPE_IDEALTEK}, 182 #endif 183 184 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH 185 {USB_DEVICE(0x0dfc, 0x0001), .driver_info = DEVTYPE_GENERAL_TOUCH}, 186 #endif 187 188 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP 189 {USB_DEVICE(0x08f2, 0x007f), .driver_info = DEVTYPE_GOTOP}, 190 {USB_DEVICE(0x08f2, 0x00ce), .driver_info = DEVTYPE_GOTOP}, 191 {USB_DEVICE(0x08f2, 0x00f4), .driver_info = DEVTYPE_GOTOP}, 192 #endif 193 194 {} 195 }; 196 197 198 /***************************************************************************** 199 * eGalax part 200 */ 201 202 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX 203 204 #ifndef MULTI_PACKET 205 #define MULTI_PACKET 206 #endif 207 208 #define EGALAX_PKT_TYPE_MASK 0xFE 209 #define EGALAX_PKT_TYPE_REPT 0x80 210 #define EGALAX_PKT_TYPE_DIAG 0x0A 211 212 static int egalax_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 213 { 214 if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT) 215 return 0; 216 217 dev->x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F); 218 dev->y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F); 219 dev->touch = pkt[0] & 0x01; 220 221 return 1; 222 } 223 224 static int egalax_get_pkt_len(unsigned char *buf, int len) 225 { 226 switch (buf[0] & EGALAX_PKT_TYPE_MASK) { 227 case EGALAX_PKT_TYPE_REPT: 228 return 5; 229 230 case EGALAX_PKT_TYPE_DIAG: 231 if (len < 2) 232 return -1; 233 234 return buf[1] + 2; 235 } 236 237 return 0; 238 } 239 #endif 240 241 242 /***************************************************************************** 243 * PanJit Part 244 */ 245 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT 246 static int panjit_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 247 { 248 dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1]; 249 dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3]; 250 dev->touch = pkt[0] & 0x01; 251 252 return 1; 253 } 254 #endif 255 256 257 /***************************************************************************** 258 * 3M/Microtouch Part 259 */ 260 #ifdef CONFIG_TOUCHSCREEN_USB_3M 261 262 #define MTOUCHUSB_ASYNC_REPORT 1 263 #define MTOUCHUSB_RESET 7 264 #define MTOUCHUSB_REQ_CTRLLR_ID 10 265 266 static int mtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 267 { 268 if (hwcalib_xy) { 269 dev->x = (pkt[4] << 8) | pkt[3]; 270 dev->y = 0xffff - ((pkt[6] << 8) | pkt[5]); 271 } else { 272 dev->x = (pkt[8] << 8) | pkt[7]; 273 dev->y = (pkt[10] << 8) | pkt[9]; 274 } 275 dev->touch = (pkt[2] & 0x40) ? 1 : 0; 276 277 return 1; 278 } 279 280 static int mtouch_init(struct usbtouch_usb *usbtouch) 281 { 282 int ret, i; 283 284 ret = usb_control_msg(usbtouch->udev, usb_rcvctrlpipe(usbtouch->udev, 0), 285 MTOUCHUSB_RESET, 286 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 287 1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT); 288 dbg("%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d", 289 __func__, ret); 290 if (ret < 0) 291 return ret; 292 msleep(150); 293 294 for (i = 0; i < 3; i++) { 295 ret = usb_control_msg(usbtouch->udev, usb_rcvctrlpipe(usbtouch->udev, 0), 296 MTOUCHUSB_ASYNC_REPORT, 297 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 298 1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT); 299 dbg("%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d", 300 __func__, ret); 301 if (ret >= 0) 302 break; 303 if (ret != -EPIPE) 304 return ret; 305 } 306 307 /* Default min/max xy are the raw values, override if using hw-calib */ 308 if (hwcalib_xy) { 309 input_set_abs_params(usbtouch->input, ABS_X, 0, 0xffff, 0, 0); 310 input_set_abs_params(usbtouch->input, ABS_Y, 0, 0xffff, 0, 0); 311 } 312 313 return 0; 314 } 315 #endif 316 317 318 /***************************************************************************** 319 * ITM Part 320 */ 321 #ifdef CONFIG_TOUCHSCREEN_USB_ITM 322 static int itm_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 323 { 324 int touch; 325 /* 326 * ITM devices report invalid x/y data if not touched. 327 * if the screen was touched before but is not touched any more 328 * report touch as 0 with the last valid x/y data once. then stop 329 * reporting data until touched again. 330 */ 331 dev->press = ((pkt[2] & 0x01) << 7) | (pkt[5] & 0x7F); 332 333 touch = ~pkt[7] & 0x20; 334 if (!touch) { 335 if (dev->touch) { 336 dev->touch = 0; 337 return 1; 338 } 339 340 return 0; 341 } 342 343 dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F); 344 dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F); 345 dev->touch = touch; 346 347 return 1; 348 } 349 #endif 350 351 352 /***************************************************************************** 353 * eTurboTouch part 354 */ 355 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO 356 #ifndef MULTI_PACKET 357 #define MULTI_PACKET 358 #endif 359 static int eturbo_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 360 { 361 unsigned int shift; 362 363 /* packets should start with sync */ 364 if (!(pkt[0] & 0x80)) 365 return 0; 366 367 shift = (6 - (pkt[0] & 0x03)); 368 dev->x = ((pkt[3] << 7) | pkt[4]) >> shift; 369 dev->y = ((pkt[1] << 7) | pkt[2]) >> shift; 370 dev->touch = (pkt[0] & 0x10) ? 1 : 0; 371 372 return 1; 373 } 374 375 static int eturbo_get_pkt_len(unsigned char *buf, int len) 376 { 377 if (buf[0] & 0x80) 378 return 5; 379 if (buf[0] == 0x01) 380 return 3; 381 return 0; 382 } 383 #endif 384 385 386 /***************************************************************************** 387 * Gunze part 388 */ 389 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE 390 static int gunze_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 391 { 392 if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80)) 393 return 0; 394 395 dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F); 396 dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F); 397 dev->touch = pkt[0] & 0x20; 398 399 return 1; 400 } 401 #endif 402 403 /***************************************************************************** 404 * DMC TSC-10/25 Part 405 * 406 * Documentation about the controller and it's protocol can be found at 407 * http://www.dmccoltd.com/files/controler/tsc10usb_pi_e.pdf 408 * http://www.dmccoltd.com/files/controler/tsc25_usb_e.pdf 409 */ 410 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10 411 412 /* supported data rates. currently using 130 */ 413 #define TSC10_RATE_POINT 0x50 414 #define TSC10_RATE_30 0x40 415 #define TSC10_RATE_50 0x41 416 #define TSC10_RATE_80 0x42 417 #define TSC10_RATE_100 0x43 418 #define TSC10_RATE_130 0x44 419 #define TSC10_RATE_150 0x45 420 421 /* commands */ 422 #define TSC10_CMD_RESET 0x55 423 #define TSC10_CMD_RATE 0x05 424 #define TSC10_CMD_DATA1 0x01 425 426 static int dmc_tsc10_init(struct usbtouch_usb *usbtouch) 427 { 428 struct usb_device *dev = usbtouch->udev; 429 int ret = -ENOMEM; 430 unsigned char *buf; 431 432 buf = kmalloc(2, GFP_KERNEL); 433 if (!buf) 434 goto err_nobuf; 435 /* reset */ 436 buf[0] = buf[1] = 0xFF; 437 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0), 438 TSC10_CMD_RESET, 439 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 440 0, 0, buf, 2, USB_CTRL_SET_TIMEOUT); 441 if (ret < 0) 442 goto err_out; 443 if (buf[0] != 0x06) { 444 ret = -ENODEV; 445 goto err_out; 446 } 447 448 /* set coordinate output rate */ 449 buf[0] = buf[1] = 0xFF; 450 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0), 451 TSC10_CMD_RATE, 452 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 453 TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT); 454 if (ret < 0) 455 goto err_out; 456 if ((buf[0] != 0x06) && (buf[0] != 0x15 || buf[1] != 0x01)) { 457 ret = -ENODEV; 458 goto err_out; 459 } 460 461 /* start sending data */ 462 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0), 463 TSC10_CMD_DATA1, 464 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 465 0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT); 466 err_out: 467 kfree(buf); 468 err_nobuf: 469 return ret; 470 } 471 472 473 static int dmc_tsc10_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 474 { 475 dev->x = ((pkt[2] & 0x03) << 8) | pkt[1]; 476 dev->y = ((pkt[4] & 0x03) << 8) | pkt[3]; 477 dev->touch = pkt[0] & 0x01; 478 479 return 1; 480 } 481 #endif 482 483 484 /***************************************************************************** 485 * IRTOUCH Part 486 */ 487 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH 488 static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 489 { 490 dev->x = (pkt[3] << 8) | pkt[2]; 491 dev->y = (pkt[5] << 8) | pkt[4]; 492 dev->touch = (pkt[1] & 0x03) ? 1 : 0; 493 494 return 1; 495 } 496 #endif 497 498 499 /***************************************************************************** 500 * IdealTEK URTC1000 Part 501 */ 502 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK 503 #ifndef MULTI_PACKET 504 #define MULTI_PACKET 505 #endif 506 static int idealtek_get_pkt_len(unsigned char *buf, int len) 507 { 508 if (buf[0] & 0x80) 509 return 5; 510 if (buf[0] == 0x01) 511 return len; 512 return 0; 513 } 514 515 static int idealtek_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 516 { 517 switch (pkt[0] & 0x98) { 518 case 0x88: 519 /* touch data in IdealTEK mode */ 520 dev->x = (pkt[1] << 5) | (pkt[2] >> 2); 521 dev->y = (pkt[3] << 5) | (pkt[4] >> 2); 522 dev->touch = (pkt[0] & 0x40) ? 1 : 0; 523 return 1; 524 525 case 0x98: 526 /* touch data in MT emulation mode */ 527 dev->x = (pkt[2] << 5) | (pkt[1] >> 2); 528 dev->y = (pkt[4] << 5) | (pkt[3] >> 2); 529 dev->touch = (pkt[0] & 0x40) ? 1 : 0; 530 return 1; 531 532 default: 533 return 0; 534 } 535 } 536 #endif 537 538 /***************************************************************************** 539 * General Touch Part 540 */ 541 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH 542 static int general_touch_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 543 { 544 dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1] ; 545 dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3] ; 546 dev->press = pkt[5] & 0xff; 547 dev->touch = pkt[0] & 0x01; 548 549 return 1; 550 } 551 #endif 552 553 /***************************************************************************** 554 * GoTop Part 555 */ 556 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP 557 static int gotop_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 558 { 559 dev->x = ((pkt[1] & 0x38) << 4) | pkt[2]; 560 dev->y = ((pkt[1] & 0x07) << 7) | pkt[3]; 561 dev->touch = pkt[0] & 0x01; 562 return 1; 563 } 564 #endif 565 566 567 /***************************************************************************** 568 * the different device descriptors 569 */ 570 #ifdef MULTI_PACKET 571 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch, 572 unsigned char *pkt, int len); 573 #endif 574 575 static struct usbtouch_device_info usbtouch_dev_info[] = { 576 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX 577 [DEVTYPE_EGALAX] = { 578 .min_xc = 0x0, 579 .max_xc = 0x07ff, 580 .min_yc = 0x0, 581 .max_yc = 0x07ff, 582 .rept_size = 16, 583 .process_pkt = usbtouch_process_multi, 584 .get_pkt_len = egalax_get_pkt_len, 585 .read_data = egalax_read_data, 586 }, 587 #endif 588 589 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT 590 [DEVTYPE_PANJIT] = { 591 .min_xc = 0x0, 592 .max_xc = 0x0fff, 593 .min_yc = 0x0, 594 .max_yc = 0x0fff, 595 .rept_size = 8, 596 .read_data = panjit_read_data, 597 }, 598 #endif 599 600 #ifdef CONFIG_TOUCHSCREEN_USB_3M 601 [DEVTYPE_3M] = { 602 .min_xc = 0x0, 603 .max_xc = 0x4000, 604 .min_yc = 0x0, 605 .max_yc = 0x4000, 606 .rept_size = 11, 607 .read_data = mtouch_read_data, 608 .init = mtouch_init, 609 }, 610 #endif 611 612 #ifdef CONFIG_TOUCHSCREEN_USB_ITM 613 [DEVTYPE_ITM] = { 614 .min_xc = 0x0, 615 .max_xc = 0x0fff, 616 .min_yc = 0x0, 617 .max_yc = 0x0fff, 618 .max_press = 0xff, 619 .rept_size = 8, 620 .read_data = itm_read_data, 621 }, 622 #endif 623 624 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO 625 [DEVTYPE_ETURBO] = { 626 .min_xc = 0x0, 627 .max_xc = 0x07ff, 628 .min_yc = 0x0, 629 .max_yc = 0x07ff, 630 .rept_size = 8, 631 .process_pkt = usbtouch_process_multi, 632 .get_pkt_len = eturbo_get_pkt_len, 633 .read_data = eturbo_read_data, 634 }, 635 #endif 636 637 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE 638 [DEVTYPE_GUNZE] = { 639 .min_xc = 0x0, 640 .max_xc = 0x0fff, 641 .min_yc = 0x0, 642 .max_yc = 0x0fff, 643 .rept_size = 4, 644 .read_data = gunze_read_data, 645 }, 646 #endif 647 648 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10 649 [DEVTYPE_DMC_TSC10] = { 650 .min_xc = 0x0, 651 .max_xc = 0x03ff, 652 .min_yc = 0x0, 653 .max_yc = 0x03ff, 654 .rept_size = 5, 655 .init = dmc_tsc10_init, 656 .read_data = dmc_tsc10_read_data, 657 }, 658 #endif 659 660 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH 661 [DEVTYPE_IRTOUCH] = { 662 .min_xc = 0x0, 663 .max_xc = 0x0fff, 664 .min_yc = 0x0, 665 .max_yc = 0x0fff, 666 .rept_size = 8, 667 .read_data = irtouch_read_data, 668 }, 669 #endif 670 671 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK 672 [DEVTYPE_IDEALTEK] = { 673 .min_xc = 0x0, 674 .max_xc = 0x0fff, 675 .min_yc = 0x0, 676 .max_yc = 0x0fff, 677 .rept_size = 8, 678 .process_pkt = usbtouch_process_multi, 679 .get_pkt_len = idealtek_get_pkt_len, 680 .read_data = idealtek_read_data, 681 }, 682 #endif 683 684 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH 685 [DEVTYPE_GENERAL_TOUCH] = { 686 .min_xc = 0x0, 687 .max_xc = 0x0500, 688 .min_yc = 0x0, 689 .max_yc = 0x0500, 690 .rept_size = 7, 691 .read_data = general_touch_read_data, 692 }, 693 #endif 694 695 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP 696 [DEVTYPE_GOTOP] = { 697 .min_xc = 0x0, 698 .max_xc = 0x03ff, 699 .min_yc = 0x0, 700 .max_yc = 0x03ff, 701 .rept_size = 4, 702 .read_data = gotop_read_data, 703 }, 704 #endif 705 }; 706 707 708 /***************************************************************************** 709 * Generic Part 710 */ 711 static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch, 712 unsigned char *pkt, int len) 713 { 714 struct usbtouch_device_info *type = usbtouch->type; 715 716 if (!type->read_data(usbtouch, pkt)) 717 return; 718 719 input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch); 720 721 if (swap_xy) { 722 input_report_abs(usbtouch->input, ABS_X, usbtouch->y); 723 input_report_abs(usbtouch->input, ABS_Y, usbtouch->x); 724 } else { 725 input_report_abs(usbtouch->input, ABS_X, usbtouch->x); 726 input_report_abs(usbtouch->input, ABS_Y, usbtouch->y); 727 } 728 if (type->max_press) 729 input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press); 730 input_sync(usbtouch->input); 731 } 732 733 734 #ifdef MULTI_PACKET 735 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch, 736 unsigned char *pkt, int len) 737 { 738 unsigned char *buffer; 739 int pkt_len, pos, buf_len, tmp; 740 741 /* process buffer */ 742 if (unlikely(usbtouch->buf_len)) { 743 /* try to get size */ 744 pkt_len = usbtouch->type->get_pkt_len( 745 usbtouch->buffer, usbtouch->buf_len); 746 747 /* drop? */ 748 if (unlikely(!pkt_len)) 749 goto out_flush_buf; 750 751 /* need to append -pkt_len bytes before able to get size */ 752 if (unlikely(pkt_len < 0)) { 753 int append = -pkt_len; 754 if (unlikely(append > len)) 755 append = len; 756 if (usbtouch->buf_len + append >= usbtouch->type->rept_size) 757 goto out_flush_buf; 758 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append); 759 usbtouch->buf_len += append; 760 761 pkt_len = usbtouch->type->get_pkt_len( 762 usbtouch->buffer, usbtouch->buf_len); 763 if (pkt_len < 0) 764 return; 765 } 766 767 /* append */ 768 tmp = pkt_len - usbtouch->buf_len; 769 if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size) 770 goto out_flush_buf; 771 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp); 772 usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len); 773 774 buffer = pkt + tmp; 775 buf_len = len - tmp; 776 } else { 777 buffer = pkt; 778 buf_len = len; 779 } 780 781 /* loop over the received packet, process */ 782 pos = 0; 783 while (pos < buf_len) { 784 /* get packet len */ 785 pkt_len = usbtouch->type->get_pkt_len(buffer + pos, 786 buf_len - pos); 787 788 /* unknown packet: skip one byte */ 789 if (unlikely(!pkt_len)) { 790 pos++; 791 continue; 792 } 793 794 /* full packet: process */ 795 if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) { 796 usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len); 797 } else { 798 /* incomplete packet: save in buffer */ 799 memcpy(usbtouch->buffer, buffer + pos, buf_len - pos); 800 usbtouch->buf_len = buf_len - pos; 801 return; 802 } 803 pos += pkt_len; 804 } 805 806 out_flush_buf: 807 usbtouch->buf_len = 0; 808 return; 809 } 810 #endif 811 812 813 static void usbtouch_irq(struct urb *urb) 814 { 815 struct usbtouch_usb *usbtouch = urb->context; 816 int retval; 817 818 switch (urb->status) { 819 case 0: 820 /* success */ 821 break; 822 case -ETIME: 823 /* this urb is timing out */ 824 dbg("%s - urb timed out - was the device unplugged?", 825 __func__); 826 return; 827 case -ECONNRESET: 828 case -ENOENT: 829 case -ESHUTDOWN: 830 /* this urb is terminated, clean up */ 831 dbg("%s - urb shutting down with status: %d", 832 __func__, urb->status); 833 return; 834 default: 835 dbg("%s - nonzero urb status received: %d", 836 __func__, urb->status); 837 goto exit; 838 } 839 840 usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length); 841 842 exit: 843 retval = usb_submit_urb(urb, GFP_ATOMIC); 844 if (retval) 845 err("%s - usb_submit_urb failed with result: %d", 846 __func__, retval); 847 } 848 849 static int usbtouch_open(struct input_dev *input) 850 { 851 struct usbtouch_usb *usbtouch = input_get_drvdata(input); 852 853 usbtouch->irq->dev = usbtouch->udev; 854 855 if (usb_submit_urb(usbtouch->irq, GFP_KERNEL)) 856 return -EIO; 857 858 return 0; 859 } 860 861 static void usbtouch_close(struct input_dev *input) 862 { 863 struct usbtouch_usb *usbtouch = input_get_drvdata(input); 864 865 usb_kill_urb(usbtouch->irq); 866 } 867 868 869 static void usbtouch_free_buffers(struct usb_device *udev, 870 struct usbtouch_usb *usbtouch) 871 { 872 usb_buffer_free(udev, usbtouch->type->rept_size, 873 usbtouch->data, usbtouch->data_dma); 874 kfree(usbtouch->buffer); 875 } 876 877 878 static int usbtouch_probe(struct usb_interface *intf, 879 const struct usb_device_id *id) 880 { 881 struct usbtouch_usb *usbtouch; 882 struct input_dev *input_dev; 883 struct usb_host_interface *interface; 884 struct usb_endpoint_descriptor *endpoint; 885 struct usb_device *udev = interface_to_usbdev(intf); 886 struct usbtouch_device_info *type; 887 int err = -ENOMEM; 888 889 /* some devices are ignored */ 890 if (id->driver_info == DEVTYPE_IGNORE) 891 return -ENODEV; 892 893 interface = intf->cur_altsetting; 894 endpoint = &interface->endpoint[0].desc; 895 896 usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL); 897 input_dev = input_allocate_device(); 898 if (!usbtouch || !input_dev) 899 goto out_free; 900 901 type = &usbtouch_dev_info[id->driver_info]; 902 usbtouch->type = type; 903 if (!type->process_pkt) 904 type->process_pkt = usbtouch_process_pkt; 905 906 usbtouch->data = usb_buffer_alloc(udev, type->rept_size, 907 GFP_KERNEL, &usbtouch->data_dma); 908 if (!usbtouch->data) 909 goto out_free; 910 911 if (type->get_pkt_len) { 912 usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL); 913 if (!usbtouch->buffer) 914 goto out_free_buffers; 915 } 916 917 usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL); 918 if (!usbtouch->irq) { 919 dbg("%s - usb_alloc_urb failed: usbtouch->irq", __func__); 920 goto out_free_buffers; 921 } 922 923 usbtouch->udev = udev; 924 usbtouch->input = input_dev; 925 926 if (udev->manufacturer) 927 strlcpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name)); 928 929 if (udev->product) { 930 if (udev->manufacturer) 931 strlcat(usbtouch->name, " ", sizeof(usbtouch->name)); 932 strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name)); 933 } 934 935 if (!strlen(usbtouch->name)) 936 snprintf(usbtouch->name, sizeof(usbtouch->name), 937 "USB Touchscreen %04x:%04x", 938 le16_to_cpu(udev->descriptor.idVendor), 939 le16_to_cpu(udev->descriptor.idProduct)); 940 941 usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys)); 942 strlcat(usbtouch->phys, "/input0", sizeof(usbtouch->phys)); 943 944 input_dev->name = usbtouch->name; 945 input_dev->phys = usbtouch->phys; 946 usb_to_input_id(udev, &input_dev->id); 947 input_dev->dev.parent = &intf->dev; 948 949 input_set_drvdata(input_dev, usbtouch); 950 951 input_dev->open = usbtouch_open; 952 input_dev->close = usbtouch_close; 953 954 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); 955 input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH); 956 input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0); 957 input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0); 958 if (type->max_press) 959 input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press, 960 type->max_press, 0, 0); 961 962 usb_fill_int_urb(usbtouch->irq, usbtouch->udev, 963 usb_rcvintpipe(usbtouch->udev, endpoint->bEndpointAddress), 964 usbtouch->data, type->rept_size, 965 usbtouch_irq, usbtouch, endpoint->bInterval); 966 967 usbtouch->irq->dev = usbtouch->udev; 968 usbtouch->irq->transfer_dma = usbtouch->data_dma; 969 usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 970 971 /* device specific init */ 972 if (type->init) { 973 err = type->init(usbtouch); 974 if (err) { 975 dbg("%s - type->init() failed, err: %d", __func__, err); 976 goto out_free_buffers; 977 } 978 } 979 980 err = input_register_device(usbtouch->input); 981 if (err) { 982 dbg("%s - input_register_device failed, err: %d", __func__, err); 983 goto out_free_buffers; 984 } 985 986 usb_set_intfdata(intf, usbtouch); 987 988 return 0; 989 990 out_free_buffers: 991 usbtouch_free_buffers(udev, usbtouch); 992 out_free: 993 input_free_device(input_dev); 994 kfree(usbtouch); 995 return err; 996 } 997 998 static void usbtouch_disconnect(struct usb_interface *intf) 999 { 1000 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf); 1001 1002 dbg("%s - called", __func__); 1003 1004 if (!usbtouch) 1005 return; 1006 1007 dbg("%s - usbtouch is initialized, cleaning up", __func__); 1008 usb_set_intfdata(intf, NULL); 1009 usb_kill_urb(usbtouch->irq); 1010 input_unregister_device(usbtouch->input); 1011 usb_free_urb(usbtouch->irq); 1012 usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch); 1013 kfree(usbtouch); 1014 } 1015 1016 MODULE_DEVICE_TABLE(usb, usbtouch_devices); 1017 1018 static struct usb_driver usbtouch_driver = { 1019 .name = "usbtouchscreen", 1020 .probe = usbtouch_probe, 1021 .disconnect = usbtouch_disconnect, 1022 .id_table = usbtouch_devices, 1023 }; 1024 1025 static int __init usbtouch_init(void) 1026 { 1027 return usb_register(&usbtouch_driver); 1028 } 1029 1030 static void __exit usbtouch_cleanup(void) 1031 { 1032 usb_deregister(&usbtouch_driver); 1033 } 1034 1035 module_init(usbtouch_init); 1036 module_exit(usbtouch_cleanup); 1037 1038 MODULE_AUTHOR(DRIVER_AUTHOR); 1039 MODULE_DESCRIPTION(DRIVER_DESC); 1040 MODULE_LICENSE("GPL"); 1041 1042 MODULE_ALIAS("touchkitusb"); 1043 MODULE_ALIAS("itmtouch"); 1044 MODULE_ALIAS("mtouchusb"); 1045