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 * - JASTEC USB touch controller/DigiTech DTR-02U 17 * - Zytronic capacitive touchscreen 18 * - NEXIO/iNexio 19 * 20 * Copyright (C) 2004-2007 by Daniel Ritz <daniel.ritz@gmx.ch> 21 * Copyright (C) by Todd E. Johnson (mtouchusb.c) 22 * 23 * This program is free software; you can redistribute it and/or 24 * modify it under the terms of the GNU General Public License as 25 * published by the Free Software Foundation; either version 2 of the 26 * License, or (at your option) any later version. 27 * 28 * This program is distributed in the hope that it will be useful, but 29 * WITHOUT ANY WARRANTY; without even the implied warranty of 30 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 31 * General Public License for more details. 32 * 33 * You should have received a copy of the GNU General Public License 34 * along with this program; if not, write to the Free Software 35 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 36 * 37 * Driver is based on touchkitusb.c 38 * - ITM parts are from itmtouch.c 39 * - 3M parts are from mtouchusb.c 40 * - PanJit parts are from an unmerged driver by Lanslott Gish 41 * - DMC TSC 10/25 are from Holger Schurig, with ideas from an unmerged 42 * driver from Marius Vollmer 43 * 44 *****************************************************************************/ 45 46 //#define DEBUG 47 48 #include <linux/kernel.h> 49 #include <linux/slab.h> 50 #include <linux/input.h> 51 #include <linux/module.h> 52 #include <linux/init.h> 53 #include <linux/usb.h> 54 #include <linux/usb/input.h> 55 #include <linux/hid.h> 56 57 58 #define DRIVER_VERSION "v0.6" 59 #define DRIVER_AUTHOR "Daniel Ritz <daniel.ritz@gmx.ch>" 60 #define DRIVER_DESC "USB Touchscreen Driver" 61 62 static int swap_xy; 63 module_param(swap_xy, bool, 0644); 64 MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped."); 65 66 static int hwcalib_xy; 67 module_param(hwcalib_xy, bool, 0644); 68 MODULE_PARM_DESC(hwcalib_xy, "If set hw-calibrated X/Y are used if available"); 69 70 /* device specifc data/functions */ 71 struct usbtouch_usb; 72 struct usbtouch_device_info { 73 int min_xc, max_xc; 74 int min_yc, max_yc; 75 int min_press, max_press; 76 int rept_size; 77 78 /* 79 * Always service the USB devices irq not just when the input device is 80 * open. This is useful when devices have a watchdog which prevents us 81 * from periodically polling the device. Leave this unset unless your 82 * touchscreen device requires it, as it does consume more of the USB 83 * bandwidth. 84 */ 85 bool irq_always; 86 87 void (*process_pkt) (struct usbtouch_usb *usbtouch, unsigned char *pkt, int len); 88 89 /* 90 * used to get the packet len. possible return values: 91 * > 0: packet len 92 * = 0: skip one byte 93 * < 0: -return value more bytes needed 94 */ 95 int (*get_pkt_len) (unsigned char *pkt, int len); 96 97 int (*read_data) (struct usbtouch_usb *usbtouch, unsigned char *pkt); 98 int (*init) (struct usbtouch_usb *usbtouch); 99 void (*exit) (struct usbtouch_usb *usbtouch); 100 }; 101 102 /* a usbtouch device */ 103 struct usbtouch_usb { 104 unsigned char *data; 105 dma_addr_t data_dma; 106 unsigned char *buffer; 107 int buf_len; 108 struct urb *irq; 109 struct usb_interface *interface; 110 struct input_dev *input; 111 struct usbtouch_device_info *type; 112 char name[128]; 113 char phys[64]; 114 void *priv; 115 116 int x, y; 117 int touch, press; 118 }; 119 120 121 /* device types */ 122 enum { 123 DEVTYPE_IGNORE = -1, 124 DEVTYPE_EGALAX, 125 DEVTYPE_PANJIT, 126 DEVTYPE_3M, 127 DEVTYPE_ITM, 128 DEVTYPE_ETURBO, 129 DEVTYPE_GUNZE, 130 DEVTYPE_DMC_TSC10, 131 DEVTYPE_IRTOUCH, 132 DEVTYPE_IDEALTEK, 133 DEVTYPE_GENERAL_TOUCH, 134 DEVTYPE_GOTOP, 135 DEVTYPE_JASTEC, 136 DEVTYPE_E2I, 137 DEVTYPE_ZYTRONIC, 138 DEVTYPE_TC5UH, 139 DEVTYPE_NEXIO, 140 }; 141 142 #define USB_DEVICE_HID_CLASS(vend, prod) \ 143 .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS \ 144 | USB_DEVICE_ID_MATCH_INT_PROTOCOL \ 145 | USB_DEVICE_ID_MATCH_DEVICE, \ 146 .idVendor = (vend), \ 147 .idProduct = (prod), \ 148 .bInterfaceClass = USB_INTERFACE_CLASS_HID, \ 149 .bInterfaceProtocol = USB_INTERFACE_PROTOCOL_MOUSE 150 151 static const struct usb_device_id usbtouch_devices[] = { 152 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX 153 /* ignore the HID capable devices, handled by usbhid */ 154 {USB_DEVICE_HID_CLASS(0x0eef, 0x0001), .driver_info = DEVTYPE_IGNORE}, 155 {USB_DEVICE_HID_CLASS(0x0eef, 0x0002), .driver_info = DEVTYPE_IGNORE}, 156 157 /* normal device IDs */ 158 {USB_DEVICE(0x3823, 0x0001), .driver_info = DEVTYPE_EGALAX}, 159 {USB_DEVICE(0x3823, 0x0002), .driver_info = DEVTYPE_EGALAX}, 160 {USB_DEVICE(0x0123, 0x0001), .driver_info = DEVTYPE_EGALAX}, 161 {USB_DEVICE(0x0eef, 0x0001), .driver_info = DEVTYPE_EGALAX}, 162 {USB_DEVICE(0x0eef, 0x0002), .driver_info = DEVTYPE_EGALAX}, 163 {USB_DEVICE(0x1234, 0x0001), .driver_info = DEVTYPE_EGALAX}, 164 {USB_DEVICE(0x1234, 0x0002), .driver_info = DEVTYPE_EGALAX}, 165 #endif 166 167 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT 168 {USB_DEVICE(0x134c, 0x0001), .driver_info = DEVTYPE_PANJIT}, 169 {USB_DEVICE(0x134c, 0x0002), .driver_info = DEVTYPE_PANJIT}, 170 {USB_DEVICE(0x134c, 0x0003), .driver_info = DEVTYPE_PANJIT}, 171 {USB_DEVICE(0x134c, 0x0004), .driver_info = DEVTYPE_PANJIT}, 172 #endif 173 174 #ifdef CONFIG_TOUCHSCREEN_USB_3M 175 {USB_DEVICE(0x0596, 0x0001), .driver_info = DEVTYPE_3M}, 176 #endif 177 178 #ifdef CONFIG_TOUCHSCREEN_USB_ITM 179 {USB_DEVICE(0x0403, 0xf9e9), .driver_info = DEVTYPE_ITM}, 180 #endif 181 182 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO 183 {USB_DEVICE(0x1234, 0x5678), .driver_info = DEVTYPE_ETURBO}, 184 #endif 185 186 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE 187 {USB_DEVICE(0x0637, 0x0001), .driver_info = DEVTYPE_GUNZE}, 188 #endif 189 190 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10 191 {USB_DEVICE(0x0afa, 0x03e8), .driver_info = DEVTYPE_DMC_TSC10}, 192 #endif 193 194 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH 195 {USB_DEVICE(0x595a, 0x0001), .driver_info = DEVTYPE_IRTOUCH}, 196 {USB_DEVICE(0x6615, 0x0001), .driver_info = DEVTYPE_IRTOUCH}, 197 #endif 198 199 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK 200 {USB_DEVICE(0x1391, 0x1000), .driver_info = DEVTYPE_IDEALTEK}, 201 #endif 202 203 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH 204 {USB_DEVICE(0x0dfc, 0x0001), .driver_info = DEVTYPE_GENERAL_TOUCH}, 205 #endif 206 207 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP 208 {USB_DEVICE(0x08f2, 0x007f), .driver_info = DEVTYPE_GOTOP}, 209 {USB_DEVICE(0x08f2, 0x00ce), .driver_info = DEVTYPE_GOTOP}, 210 {USB_DEVICE(0x08f2, 0x00f4), .driver_info = DEVTYPE_GOTOP}, 211 #endif 212 213 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC 214 {USB_DEVICE(0x0f92, 0x0001), .driver_info = DEVTYPE_JASTEC}, 215 #endif 216 217 #ifdef CONFIG_TOUCHSCREEN_USB_E2I 218 {USB_DEVICE(0x1ac7, 0x0001), .driver_info = DEVTYPE_E2I}, 219 #endif 220 221 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC 222 {USB_DEVICE(0x14c8, 0x0003), .driver_info = DEVTYPE_ZYTRONIC}, 223 #endif 224 225 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC5UH 226 {USB_DEVICE(0x0664, 0x0309), .driver_info = DEVTYPE_TC5UH}, 227 #endif 228 229 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO 230 /* data interface only */ 231 {USB_DEVICE_AND_INTERFACE_INFO(0x10f0, 0x2002, 0x0a, 0x00, 0x00), 232 .driver_info = DEVTYPE_NEXIO}, 233 {USB_DEVICE_AND_INTERFACE_INFO(0x1870, 0x0001, 0x0a, 0x00, 0x00), 234 .driver_info = DEVTYPE_NEXIO}, 235 #endif 236 237 {} 238 }; 239 240 241 /***************************************************************************** 242 * e2i Part 243 */ 244 245 #ifdef CONFIG_TOUCHSCREEN_USB_E2I 246 static int e2i_init(struct usbtouch_usb *usbtouch) 247 { 248 int ret; 249 struct usb_device *udev = interface_to_usbdev(usbtouch->interface); 250 251 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 252 0x01, 0x02, 0x0000, 0x0081, 253 NULL, 0, USB_CTRL_SET_TIMEOUT); 254 255 dbg("%s - usb_control_msg - E2I_RESET - bytes|err: %d", 256 __func__, ret); 257 return ret; 258 } 259 260 static int e2i_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 261 { 262 int tmp = (pkt[0] << 8) | pkt[1]; 263 dev->x = (pkt[2] << 8) | pkt[3]; 264 dev->y = (pkt[4] << 8) | pkt[5]; 265 266 tmp = tmp - 0xA000; 267 dev->touch = (tmp > 0); 268 dev->press = (tmp > 0 ? tmp : 0); 269 270 return 1; 271 } 272 #endif 273 274 275 /***************************************************************************** 276 * eGalax part 277 */ 278 279 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX 280 281 #ifndef MULTI_PACKET 282 #define MULTI_PACKET 283 #endif 284 285 #define EGALAX_PKT_TYPE_MASK 0xFE 286 #define EGALAX_PKT_TYPE_REPT 0x80 287 #define EGALAX_PKT_TYPE_DIAG 0x0A 288 289 static int egalax_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 290 { 291 if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT) 292 return 0; 293 294 dev->x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F); 295 dev->y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F); 296 dev->touch = pkt[0] & 0x01; 297 298 return 1; 299 } 300 301 static int egalax_get_pkt_len(unsigned char *buf, int len) 302 { 303 switch (buf[0] & EGALAX_PKT_TYPE_MASK) { 304 case EGALAX_PKT_TYPE_REPT: 305 return 5; 306 307 case EGALAX_PKT_TYPE_DIAG: 308 if (len < 2) 309 return -1; 310 311 return buf[1] + 2; 312 } 313 314 return 0; 315 } 316 #endif 317 318 319 /***************************************************************************** 320 * PanJit Part 321 */ 322 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT 323 static int panjit_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 324 { 325 dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1]; 326 dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3]; 327 dev->touch = pkt[0] & 0x01; 328 329 return 1; 330 } 331 #endif 332 333 334 /***************************************************************************** 335 * 3M/Microtouch Part 336 */ 337 #ifdef CONFIG_TOUCHSCREEN_USB_3M 338 339 #define MTOUCHUSB_ASYNC_REPORT 1 340 #define MTOUCHUSB_RESET 7 341 #define MTOUCHUSB_REQ_CTRLLR_ID 10 342 343 static int mtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 344 { 345 if (hwcalib_xy) { 346 dev->x = (pkt[4] << 8) | pkt[3]; 347 dev->y = 0xffff - ((pkt[6] << 8) | pkt[5]); 348 } else { 349 dev->x = (pkt[8] << 8) | pkt[7]; 350 dev->y = (pkt[10] << 8) | pkt[9]; 351 } 352 dev->touch = (pkt[2] & 0x40) ? 1 : 0; 353 354 return 1; 355 } 356 357 static int mtouch_init(struct usbtouch_usb *usbtouch) 358 { 359 int ret, i; 360 struct usb_device *udev = interface_to_usbdev(usbtouch->interface); 361 362 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 363 MTOUCHUSB_RESET, 364 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 365 1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT); 366 dbg("%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d", 367 __func__, ret); 368 if (ret < 0) 369 return ret; 370 msleep(150); 371 372 for (i = 0; i < 3; i++) { 373 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 374 MTOUCHUSB_ASYNC_REPORT, 375 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 376 1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT); 377 dbg("%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d", 378 __func__, ret); 379 if (ret >= 0) 380 break; 381 if (ret != -EPIPE) 382 return ret; 383 } 384 385 /* Default min/max xy are the raw values, override if using hw-calib */ 386 if (hwcalib_xy) { 387 input_set_abs_params(usbtouch->input, ABS_X, 0, 0xffff, 0, 0); 388 input_set_abs_params(usbtouch->input, ABS_Y, 0, 0xffff, 0, 0); 389 } 390 391 return 0; 392 } 393 #endif 394 395 396 /***************************************************************************** 397 * ITM Part 398 */ 399 #ifdef CONFIG_TOUCHSCREEN_USB_ITM 400 static int itm_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 401 { 402 int touch; 403 /* 404 * ITM devices report invalid x/y data if not touched. 405 * if the screen was touched before but is not touched any more 406 * report touch as 0 with the last valid x/y data once. then stop 407 * reporting data until touched again. 408 */ 409 dev->press = ((pkt[2] & 0x01) << 7) | (pkt[5] & 0x7F); 410 411 touch = ~pkt[7] & 0x20; 412 if (!touch) { 413 if (dev->touch) { 414 dev->touch = 0; 415 return 1; 416 } 417 418 return 0; 419 } 420 421 dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F); 422 dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F); 423 dev->touch = touch; 424 425 return 1; 426 } 427 #endif 428 429 430 /***************************************************************************** 431 * eTurboTouch part 432 */ 433 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO 434 #ifndef MULTI_PACKET 435 #define MULTI_PACKET 436 #endif 437 static int eturbo_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 438 { 439 unsigned int shift; 440 441 /* packets should start with sync */ 442 if (!(pkt[0] & 0x80)) 443 return 0; 444 445 shift = (6 - (pkt[0] & 0x03)); 446 dev->x = ((pkt[3] << 7) | pkt[4]) >> shift; 447 dev->y = ((pkt[1] << 7) | pkt[2]) >> shift; 448 dev->touch = (pkt[0] & 0x10) ? 1 : 0; 449 450 return 1; 451 } 452 453 static int eturbo_get_pkt_len(unsigned char *buf, int len) 454 { 455 if (buf[0] & 0x80) 456 return 5; 457 if (buf[0] == 0x01) 458 return 3; 459 return 0; 460 } 461 #endif 462 463 464 /***************************************************************************** 465 * Gunze part 466 */ 467 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE 468 static int gunze_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 469 { 470 if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80)) 471 return 0; 472 473 dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F); 474 dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F); 475 dev->touch = pkt[0] & 0x20; 476 477 return 1; 478 } 479 #endif 480 481 /***************************************************************************** 482 * DMC TSC-10/25 Part 483 * 484 * Documentation about the controller and it's protocol can be found at 485 * http://www.dmccoltd.com/files/controler/tsc10usb_pi_e.pdf 486 * http://www.dmccoltd.com/files/controler/tsc25_usb_e.pdf 487 */ 488 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10 489 490 /* supported data rates. currently using 130 */ 491 #define TSC10_RATE_POINT 0x50 492 #define TSC10_RATE_30 0x40 493 #define TSC10_RATE_50 0x41 494 #define TSC10_RATE_80 0x42 495 #define TSC10_RATE_100 0x43 496 #define TSC10_RATE_130 0x44 497 #define TSC10_RATE_150 0x45 498 499 /* commands */ 500 #define TSC10_CMD_RESET 0x55 501 #define TSC10_CMD_RATE 0x05 502 #define TSC10_CMD_DATA1 0x01 503 504 static int dmc_tsc10_init(struct usbtouch_usb *usbtouch) 505 { 506 struct usb_device *dev = interface_to_usbdev(usbtouch->interface); 507 int ret = -ENOMEM; 508 unsigned char *buf; 509 510 buf = kmalloc(2, GFP_KERNEL); 511 if (!buf) 512 goto err_nobuf; 513 /* reset */ 514 buf[0] = buf[1] = 0xFF; 515 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0), 516 TSC10_CMD_RESET, 517 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 518 0, 0, buf, 2, USB_CTRL_SET_TIMEOUT); 519 if (ret < 0) 520 goto err_out; 521 if (buf[0] != 0x06) { 522 ret = -ENODEV; 523 goto err_out; 524 } 525 526 /* set coordinate output rate */ 527 buf[0] = buf[1] = 0xFF; 528 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0), 529 TSC10_CMD_RATE, 530 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 531 TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT); 532 if (ret < 0) 533 goto err_out; 534 if ((buf[0] != 0x06) && (buf[0] != 0x15 || buf[1] != 0x01)) { 535 ret = -ENODEV; 536 goto err_out; 537 } 538 539 /* start sending data */ 540 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0), 541 TSC10_CMD_DATA1, 542 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 543 0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT); 544 err_out: 545 kfree(buf); 546 err_nobuf: 547 return ret; 548 } 549 550 551 static int dmc_tsc10_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 552 { 553 dev->x = ((pkt[2] & 0x03) << 8) | pkt[1]; 554 dev->y = ((pkt[4] & 0x03) << 8) | pkt[3]; 555 dev->touch = pkt[0] & 0x01; 556 557 return 1; 558 } 559 #endif 560 561 562 /***************************************************************************** 563 * IRTOUCH Part 564 */ 565 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH 566 static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 567 { 568 dev->x = (pkt[3] << 8) | pkt[2]; 569 dev->y = (pkt[5] << 8) | pkt[4]; 570 dev->touch = (pkt[1] & 0x03) ? 1 : 0; 571 572 return 1; 573 } 574 #endif 575 576 /***************************************************************************** 577 * ET&T TC5UH part 578 */ 579 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC5UH 580 static int tc5uh_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 581 { 582 dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1]; 583 dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3]; 584 dev->touch = pkt[0] & 0x01; 585 586 return 1; 587 } 588 #endif 589 590 /***************************************************************************** 591 * IdealTEK URTC1000 Part 592 */ 593 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK 594 #ifndef MULTI_PACKET 595 #define MULTI_PACKET 596 #endif 597 static int idealtek_get_pkt_len(unsigned char *buf, int len) 598 { 599 if (buf[0] & 0x80) 600 return 5; 601 if (buf[0] == 0x01) 602 return len; 603 return 0; 604 } 605 606 static int idealtek_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 607 { 608 switch (pkt[0] & 0x98) { 609 case 0x88: 610 /* touch data in IdealTEK mode */ 611 dev->x = (pkt[1] << 5) | (pkt[2] >> 2); 612 dev->y = (pkt[3] << 5) | (pkt[4] >> 2); 613 dev->touch = (pkt[0] & 0x40) ? 1 : 0; 614 return 1; 615 616 case 0x98: 617 /* touch data in MT emulation mode */ 618 dev->x = (pkt[2] << 5) | (pkt[1] >> 2); 619 dev->y = (pkt[4] << 5) | (pkt[3] >> 2); 620 dev->touch = (pkt[0] & 0x40) ? 1 : 0; 621 return 1; 622 623 default: 624 return 0; 625 } 626 } 627 #endif 628 629 /***************************************************************************** 630 * General Touch Part 631 */ 632 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH 633 static int general_touch_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 634 { 635 dev->x = (pkt[2] << 8) | pkt[1]; 636 dev->y = (pkt[4] << 8) | pkt[3]; 637 dev->press = pkt[5] & 0xff; 638 dev->touch = pkt[0] & 0x01; 639 640 return 1; 641 } 642 #endif 643 644 /***************************************************************************** 645 * GoTop Part 646 */ 647 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP 648 static int gotop_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 649 { 650 dev->x = ((pkt[1] & 0x38) << 4) | pkt[2]; 651 dev->y = ((pkt[1] & 0x07) << 7) | pkt[3]; 652 dev->touch = pkt[0] & 0x01; 653 654 return 1; 655 } 656 #endif 657 658 /***************************************************************************** 659 * JASTEC Part 660 */ 661 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC 662 static int jastec_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 663 { 664 dev->x = ((pkt[0] & 0x3f) << 6) | (pkt[2] & 0x3f); 665 dev->y = ((pkt[1] & 0x3f) << 6) | (pkt[3] & 0x3f); 666 dev->touch = (pkt[0] & 0x40) >> 6; 667 668 return 1; 669 } 670 #endif 671 672 /***************************************************************************** 673 * Zytronic Part 674 */ 675 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC 676 static int zytronic_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 677 { 678 switch (pkt[0]) { 679 case 0x3A: /* command response */ 680 dbg("%s: Command response %d", __func__, pkt[1]); 681 break; 682 683 case 0xC0: /* down */ 684 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7); 685 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7); 686 dev->touch = 1; 687 dbg("%s: down %d,%d", __func__, dev->x, dev->y); 688 return 1; 689 690 case 0x80: /* up */ 691 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7); 692 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7); 693 dev->touch = 0; 694 dbg("%s: up %d,%d", __func__, dev->x, dev->y); 695 return 1; 696 697 default: 698 dbg("%s: Unknown return %d", __func__, pkt[0]); 699 break; 700 } 701 702 return 0; 703 } 704 #endif 705 706 /***************************************************************************** 707 * NEXIO Part 708 */ 709 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO 710 711 #define NEXIO_TIMEOUT 5000 712 #define NEXIO_BUFSIZE 1024 713 #define NEXIO_THRESHOLD 50 714 715 struct nexio_priv { 716 struct urb *ack; 717 unsigned char *ack_buf; 718 }; 719 720 struct nexio_touch_packet { 721 u8 flags; /* 0xe1 = touch, 0xe1 = release */ 722 __be16 data_len; /* total bytes of touch data */ 723 __be16 x_len; /* bytes for X axis */ 724 __be16 y_len; /* bytes for Y axis */ 725 u8 data[]; 726 } __attribute__ ((packed)); 727 728 static unsigned char nexio_ack_pkt[2] = { 0xaa, 0x02 }; 729 static unsigned char nexio_init_pkt[4] = { 0x82, 0x04, 0x0a, 0x0f }; 730 731 static void nexio_ack_complete(struct urb *urb) 732 { 733 } 734 735 static int nexio_init(struct usbtouch_usb *usbtouch) 736 { 737 struct usb_device *dev = interface_to_usbdev(usbtouch->interface); 738 struct usb_host_interface *interface = usbtouch->interface->cur_altsetting; 739 struct nexio_priv *priv; 740 int ret = -ENOMEM; 741 int actual_len, i; 742 unsigned char *buf; 743 char *firmware_ver = NULL, *device_name = NULL; 744 int input_ep = 0, output_ep = 0; 745 746 /* find first input and output endpoint */ 747 for (i = 0; i < interface->desc.bNumEndpoints; i++) { 748 if (!input_ep && 749 usb_endpoint_dir_in(&interface->endpoint[i].desc)) 750 input_ep = interface->endpoint[i].desc.bEndpointAddress; 751 if (!output_ep && 752 usb_endpoint_dir_out(&interface->endpoint[i].desc)) 753 output_ep = interface->endpoint[i].desc.bEndpointAddress; 754 } 755 if (!input_ep || !output_ep) 756 return -ENXIO; 757 758 buf = kmalloc(NEXIO_BUFSIZE, GFP_KERNEL); 759 if (!buf) 760 goto out_buf; 761 762 /* two empty reads */ 763 for (i = 0; i < 2; i++) { 764 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep), 765 buf, NEXIO_BUFSIZE, &actual_len, 766 NEXIO_TIMEOUT); 767 if (ret < 0) 768 goto out_buf; 769 } 770 771 /* send init command */ 772 memcpy(buf, nexio_init_pkt, sizeof(nexio_init_pkt)); 773 ret = usb_bulk_msg(dev, usb_sndbulkpipe(dev, output_ep), 774 buf, sizeof(nexio_init_pkt), &actual_len, 775 NEXIO_TIMEOUT); 776 if (ret < 0) 777 goto out_buf; 778 779 /* read replies */ 780 for (i = 0; i < 3; i++) { 781 memset(buf, 0, NEXIO_BUFSIZE); 782 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep), 783 buf, NEXIO_BUFSIZE, &actual_len, 784 NEXIO_TIMEOUT); 785 if (ret < 0 || actual_len < 1 || buf[1] != actual_len) 786 continue; 787 switch (buf[0]) { 788 case 0x83: /* firmware version */ 789 if (!firmware_ver) 790 firmware_ver = kstrdup(&buf[2], GFP_KERNEL); 791 break; 792 case 0x84: /* device name */ 793 if (!device_name) 794 device_name = kstrdup(&buf[2], GFP_KERNEL); 795 break; 796 } 797 } 798 799 printk(KERN_INFO "Nexio device: %s, firmware version: %s\n", 800 device_name, firmware_ver); 801 802 kfree(firmware_ver); 803 kfree(device_name); 804 805 /* prepare ACK URB */ 806 ret = -ENOMEM; 807 808 usbtouch->priv = kmalloc(sizeof(struct nexio_priv), GFP_KERNEL); 809 if (!usbtouch->priv) 810 goto out_buf; 811 812 priv = usbtouch->priv; 813 814 priv->ack_buf = kmemdup(nexio_ack_pkt, sizeof(nexio_ack_pkt), 815 GFP_KERNEL); 816 if (!priv->ack_buf) 817 goto err_priv; 818 819 priv->ack = usb_alloc_urb(0, GFP_KERNEL); 820 if (!priv->ack) { 821 dbg("%s - usb_alloc_urb failed: usbtouch->ack", __func__); 822 goto err_ack_buf; 823 } 824 825 usb_fill_bulk_urb(priv->ack, dev, usb_sndbulkpipe(dev, output_ep), 826 priv->ack_buf, sizeof(nexio_ack_pkt), 827 nexio_ack_complete, usbtouch); 828 ret = 0; 829 goto out_buf; 830 831 err_ack_buf: 832 kfree(priv->ack_buf); 833 err_priv: 834 kfree(priv); 835 out_buf: 836 kfree(buf); 837 return ret; 838 } 839 840 static void nexio_exit(struct usbtouch_usb *usbtouch) 841 { 842 struct nexio_priv *priv = usbtouch->priv; 843 844 usb_kill_urb(priv->ack); 845 usb_free_urb(priv->ack); 846 kfree(priv->ack_buf); 847 kfree(priv); 848 } 849 850 static int nexio_read_data(struct usbtouch_usb *usbtouch, unsigned char *pkt) 851 { 852 int x, y, begin_x, begin_y, end_x, end_y, w, h, ret; 853 struct nexio_touch_packet *packet = (void *) pkt; 854 struct nexio_priv *priv = usbtouch->priv; 855 856 /* got touch data? */ 857 if ((pkt[0] & 0xe0) != 0xe0) 858 return 0; 859 860 /* send ACK */ 861 ret = usb_submit_urb(priv->ack, GFP_ATOMIC); 862 863 if (!usbtouch->type->max_xc) { 864 usbtouch->type->max_xc = 2 * be16_to_cpu(packet->x_len); 865 input_set_abs_params(usbtouch->input, ABS_X, 0, 866 2 * be16_to_cpu(packet->x_len), 0, 0); 867 usbtouch->type->max_yc = 2 * be16_to_cpu(packet->y_len); 868 input_set_abs_params(usbtouch->input, ABS_Y, 0, 869 2 * be16_to_cpu(packet->y_len), 0, 0); 870 } 871 /* 872 * The device reports state of IR sensors on X and Y axes. 873 * Each byte represents "darkness" percentage (0-100) of one element. 874 * 17" touchscreen reports only 64 x 52 bytes so the resolution is low. 875 * This also means that there's a limited multi-touch capability but 876 * it's disabled (and untested) here as there's no X driver for that. 877 */ 878 begin_x = end_x = begin_y = end_y = -1; 879 for (x = 0; x < be16_to_cpu(packet->x_len); x++) { 880 if (begin_x == -1 && packet->data[x] > NEXIO_THRESHOLD) { 881 begin_x = x; 882 continue; 883 } 884 if (end_x == -1 && begin_x != -1 && packet->data[x] < NEXIO_THRESHOLD) { 885 end_x = x - 1; 886 for (y = be16_to_cpu(packet->x_len); 887 y < be16_to_cpu(packet->data_len); y++) { 888 if (begin_y == -1 && packet->data[y] > NEXIO_THRESHOLD) { 889 begin_y = y - be16_to_cpu(packet->x_len); 890 continue; 891 } 892 if (end_y == -1 && 893 begin_y != -1 && packet->data[y] < NEXIO_THRESHOLD) { 894 end_y = y - 1 - be16_to_cpu(packet->x_len); 895 w = end_x - begin_x; 896 h = end_y - begin_y; 897 #if 0 898 /* multi-touch */ 899 input_report_abs(usbtouch->input, 900 ABS_MT_TOUCH_MAJOR, max(w,h)); 901 input_report_abs(usbtouch->input, 902 ABS_MT_TOUCH_MINOR, min(x,h)); 903 input_report_abs(usbtouch->input, 904 ABS_MT_POSITION_X, 2*begin_x+w); 905 input_report_abs(usbtouch->input, 906 ABS_MT_POSITION_Y, 2*begin_y+h); 907 input_report_abs(usbtouch->input, 908 ABS_MT_ORIENTATION, w > h); 909 input_mt_sync(usbtouch->input); 910 #endif 911 /* single touch */ 912 usbtouch->x = 2 * begin_x + w; 913 usbtouch->y = 2 * begin_y + h; 914 usbtouch->touch = packet->flags & 0x01; 915 begin_y = end_y = -1; 916 return 1; 917 } 918 } 919 begin_x = end_x = -1; 920 } 921 922 } 923 return 0; 924 } 925 #endif 926 927 928 /***************************************************************************** 929 * the different device descriptors 930 */ 931 #ifdef MULTI_PACKET 932 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch, 933 unsigned char *pkt, int len); 934 #endif 935 936 static struct usbtouch_device_info usbtouch_dev_info[] = { 937 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX 938 [DEVTYPE_EGALAX] = { 939 .min_xc = 0x0, 940 .max_xc = 0x07ff, 941 .min_yc = 0x0, 942 .max_yc = 0x07ff, 943 .rept_size = 16, 944 .process_pkt = usbtouch_process_multi, 945 .get_pkt_len = egalax_get_pkt_len, 946 .read_data = egalax_read_data, 947 }, 948 #endif 949 950 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT 951 [DEVTYPE_PANJIT] = { 952 .min_xc = 0x0, 953 .max_xc = 0x0fff, 954 .min_yc = 0x0, 955 .max_yc = 0x0fff, 956 .rept_size = 8, 957 .read_data = panjit_read_data, 958 }, 959 #endif 960 961 #ifdef CONFIG_TOUCHSCREEN_USB_3M 962 [DEVTYPE_3M] = { 963 .min_xc = 0x0, 964 .max_xc = 0x4000, 965 .min_yc = 0x0, 966 .max_yc = 0x4000, 967 .rept_size = 11, 968 .read_data = mtouch_read_data, 969 .init = mtouch_init, 970 }, 971 #endif 972 973 #ifdef CONFIG_TOUCHSCREEN_USB_ITM 974 [DEVTYPE_ITM] = { 975 .min_xc = 0x0, 976 .max_xc = 0x0fff, 977 .min_yc = 0x0, 978 .max_yc = 0x0fff, 979 .max_press = 0xff, 980 .rept_size = 8, 981 .read_data = itm_read_data, 982 }, 983 #endif 984 985 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO 986 [DEVTYPE_ETURBO] = { 987 .min_xc = 0x0, 988 .max_xc = 0x07ff, 989 .min_yc = 0x0, 990 .max_yc = 0x07ff, 991 .rept_size = 8, 992 .process_pkt = usbtouch_process_multi, 993 .get_pkt_len = eturbo_get_pkt_len, 994 .read_data = eturbo_read_data, 995 }, 996 #endif 997 998 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE 999 [DEVTYPE_GUNZE] = { 1000 .min_xc = 0x0, 1001 .max_xc = 0x0fff, 1002 .min_yc = 0x0, 1003 .max_yc = 0x0fff, 1004 .rept_size = 4, 1005 .read_data = gunze_read_data, 1006 }, 1007 #endif 1008 1009 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10 1010 [DEVTYPE_DMC_TSC10] = { 1011 .min_xc = 0x0, 1012 .max_xc = 0x03ff, 1013 .min_yc = 0x0, 1014 .max_yc = 0x03ff, 1015 .rept_size = 5, 1016 .init = dmc_tsc10_init, 1017 .read_data = dmc_tsc10_read_data, 1018 }, 1019 #endif 1020 1021 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH 1022 [DEVTYPE_IRTOUCH] = { 1023 .min_xc = 0x0, 1024 .max_xc = 0x0fff, 1025 .min_yc = 0x0, 1026 .max_yc = 0x0fff, 1027 .rept_size = 8, 1028 .read_data = irtouch_read_data, 1029 }, 1030 #endif 1031 1032 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK 1033 [DEVTYPE_IDEALTEK] = { 1034 .min_xc = 0x0, 1035 .max_xc = 0x0fff, 1036 .min_yc = 0x0, 1037 .max_yc = 0x0fff, 1038 .rept_size = 8, 1039 .process_pkt = usbtouch_process_multi, 1040 .get_pkt_len = idealtek_get_pkt_len, 1041 .read_data = idealtek_read_data, 1042 }, 1043 #endif 1044 1045 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH 1046 [DEVTYPE_GENERAL_TOUCH] = { 1047 .min_xc = 0x0, 1048 .max_xc = 0x7fff, 1049 .min_yc = 0x0, 1050 .max_yc = 0x7fff, 1051 .rept_size = 7, 1052 .read_data = general_touch_read_data, 1053 }, 1054 #endif 1055 1056 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP 1057 [DEVTYPE_GOTOP] = { 1058 .min_xc = 0x0, 1059 .max_xc = 0x03ff, 1060 .min_yc = 0x0, 1061 .max_yc = 0x03ff, 1062 .rept_size = 4, 1063 .read_data = gotop_read_data, 1064 }, 1065 #endif 1066 1067 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC 1068 [DEVTYPE_JASTEC] = { 1069 .min_xc = 0x0, 1070 .max_xc = 0x0fff, 1071 .min_yc = 0x0, 1072 .max_yc = 0x0fff, 1073 .rept_size = 4, 1074 .read_data = jastec_read_data, 1075 }, 1076 #endif 1077 1078 #ifdef CONFIG_TOUCHSCREEN_USB_E2I 1079 [DEVTYPE_E2I] = { 1080 .min_xc = 0x0, 1081 .max_xc = 0x7fff, 1082 .min_yc = 0x0, 1083 .max_yc = 0x7fff, 1084 .rept_size = 6, 1085 .init = e2i_init, 1086 .read_data = e2i_read_data, 1087 }, 1088 #endif 1089 1090 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC 1091 [DEVTYPE_ZYTRONIC] = { 1092 .min_xc = 0x0, 1093 .max_xc = 0x03ff, 1094 .min_yc = 0x0, 1095 .max_yc = 0x03ff, 1096 .rept_size = 5, 1097 .read_data = zytronic_read_data, 1098 .irq_always = true, 1099 }, 1100 #endif 1101 1102 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC5UH 1103 [DEVTYPE_TC5UH] = { 1104 .min_xc = 0x0, 1105 .max_xc = 0x0fff, 1106 .min_yc = 0x0, 1107 .max_yc = 0x0fff, 1108 .rept_size = 5, 1109 .read_data = tc5uh_read_data, 1110 }, 1111 #endif 1112 1113 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO 1114 [DEVTYPE_NEXIO] = { 1115 .rept_size = 128, 1116 .irq_always = true, 1117 .read_data = nexio_read_data, 1118 .init = nexio_init, 1119 .exit = nexio_exit, 1120 }, 1121 #endif 1122 }; 1123 1124 1125 /***************************************************************************** 1126 * Generic Part 1127 */ 1128 static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch, 1129 unsigned char *pkt, int len) 1130 { 1131 struct usbtouch_device_info *type = usbtouch->type; 1132 1133 if (!type->read_data(usbtouch, pkt)) 1134 return; 1135 1136 input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch); 1137 1138 if (swap_xy) { 1139 input_report_abs(usbtouch->input, ABS_X, usbtouch->y); 1140 input_report_abs(usbtouch->input, ABS_Y, usbtouch->x); 1141 } else { 1142 input_report_abs(usbtouch->input, ABS_X, usbtouch->x); 1143 input_report_abs(usbtouch->input, ABS_Y, usbtouch->y); 1144 } 1145 if (type->max_press) 1146 input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press); 1147 input_sync(usbtouch->input); 1148 } 1149 1150 1151 #ifdef MULTI_PACKET 1152 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch, 1153 unsigned char *pkt, int len) 1154 { 1155 unsigned char *buffer; 1156 int pkt_len, pos, buf_len, tmp; 1157 1158 /* process buffer */ 1159 if (unlikely(usbtouch->buf_len)) { 1160 /* try to get size */ 1161 pkt_len = usbtouch->type->get_pkt_len( 1162 usbtouch->buffer, usbtouch->buf_len); 1163 1164 /* drop? */ 1165 if (unlikely(!pkt_len)) 1166 goto out_flush_buf; 1167 1168 /* need to append -pkt_len bytes before able to get size */ 1169 if (unlikely(pkt_len < 0)) { 1170 int append = -pkt_len; 1171 if (unlikely(append > len)) 1172 append = len; 1173 if (usbtouch->buf_len + append >= usbtouch->type->rept_size) 1174 goto out_flush_buf; 1175 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append); 1176 usbtouch->buf_len += append; 1177 1178 pkt_len = usbtouch->type->get_pkt_len( 1179 usbtouch->buffer, usbtouch->buf_len); 1180 if (pkt_len < 0) 1181 return; 1182 } 1183 1184 /* append */ 1185 tmp = pkt_len - usbtouch->buf_len; 1186 if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size) 1187 goto out_flush_buf; 1188 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp); 1189 usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len); 1190 1191 buffer = pkt + tmp; 1192 buf_len = len - tmp; 1193 } else { 1194 buffer = pkt; 1195 buf_len = len; 1196 } 1197 1198 /* loop over the received packet, process */ 1199 pos = 0; 1200 while (pos < buf_len) { 1201 /* get packet len */ 1202 pkt_len = usbtouch->type->get_pkt_len(buffer + pos, 1203 buf_len - pos); 1204 1205 /* unknown packet: skip one byte */ 1206 if (unlikely(!pkt_len)) { 1207 pos++; 1208 continue; 1209 } 1210 1211 /* full packet: process */ 1212 if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) { 1213 usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len); 1214 } else { 1215 /* incomplete packet: save in buffer */ 1216 memcpy(usbtouch->buffer, buffer + pos, buf_len - pos); 1217 usbtouch->buf_len = buf_len - pos; 1218 return; 1219 } 1220 pos += pkt_len; 1221 } 1222 1223 out_flush_buf: 1224 usbtouch->buf_len = 0; 1225 return; 1226 } 1227 #endif 1228 1229 1230 static void usbtouch_irq(struct urb *urb) 1231 { 1232 struct usbtouch_usb *usbtouch = urb->context; 1233 int retval; 1234 1235 switch (urb->status) { 1236 case 0: 1237 /* success */ 1238 break; 1239 case -ETIME: 1240 /* this urb is timing out */ 1241 dbg("%s - urb timed out - was the device unplugged?", 1242 __func__); 1243 return; 1244 case -ECONNRESET: 1245 case -ENOENT: 1246 case -ESHUTDOWN: 1247 case -EPIPE: 1248 /* this urb is terminated, clean up */ 1249 dbg("%s - urb shutting down with status: %d", 1250 __func__, urb->status); 1251 return; 1252 default: 1253 dbg("%s - nonzero urb status received: %d", 1254 __func__, urb->status); 1255 goto exit; 1256 } 1257 1258 usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length); 1259 1260 exit: 1261 retval = usb_submit_urb(urb, GFP_ATOMIC); 1262 if (retval) 1263 err("%s - usb_submit_urb failed with result: %d", 1264 __func__, retval); 1265 } 1266 1267 static int usbtouch_open(struct input_dev *input) 1268 { 1269 struct usbtouch_usb *usbtouch = input_get_drvdata(input); 1270 1271 usbtouch->irq->dev = interface_to_usbdev(usbtouch->interface); 1272 1273 if (!usbtouch->type->irq_always) { 1274 if (usb_submit_urb(usbtouch->irq, GFP_KERNEL)) 1275 return -EIO; 1276 } 1277 1278 return 0; 1279 } 1280 1281 static void usbtouch_close(struct input_dev *input) 1282 { 1283 struct usbtouch_usb *usbtouch = input_get_drvdata(input); 1284 1285 if (!usbtouch->type->irq_always) 1286 usb_kill_urb(usbtouch->irq); 1287 } 1288 1289 1290 static void usbtouch_free_buffers(struct usb_device *udev, 1291 struct usbtouch_usb *usbtouch) 1292 { 1293 usb_free_coherent(udev, usbtouch->type->rept_size, 1294 usbtouch->data, usbtouch->data_dma); 1295 kfree(usbtouch->buffer); 1296 } 1297 1298 static struct usb_endpoint_descriptor * 1299 usbtouch_get_input_endpoint(struct usb_host_interface *interface) 1300 { 1301 int i; 1302 1303 for (i = 0; i < interface->desc.bNumEndpoints; i++) 1304 if (usb_endpoint_dir_in(&interface->endpoint[i].desc)) 1305 return &interface->endpoint[i].desc; 1306 1307 return NULL; 1308 } 1309 1310 static int usbtouch_probe(struct usb_interface *intf, 1311 const struct usb_device_id *id) 1312 { 1313 struct usbtouch_usb *usbtouch; 1314 struct input_dev *input_dev; 1315 struct usb_endpoint_descriptor *endpoint; 1316 struct usb_device *udev = interface_to_usbdev(intf); 1317 struct usbtouch_device_info *type; 1318 int err = -ENOMEM; 1319 1320 /* some devices are ignored */ 1321 if (id->driver_info == DEVTYPE_IGNORE) 1322 return -ENODEV; 1323 1324 endpoint = usbtouch_get_input_endpoint(intf->cur_altsetting); 1325 if (!endpoint) 1326 return -ENXIO; 1327 1328 usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL); 1329 input_dev = input_allocate_device(); 1330 if (!usbtouch || !input_dev) 1331 goto out_free; 1332 1333 type = &usbtouch_dev_info[id->driver_info]; 1334 usbtouch->type = type; 1335 if (!type->process_pkt) 1336 type->process_pkt = usbtouch_process_pkt; 1337 1338 usbtouch->data = usb_alloc_coherent(udev, type->rept_size, 1339 GFP_KERNEL, &usbtouch->data_dma); 1340 if (!usbtouch->data) 1341 goto out_free; 1342 1343 if (type->get_pkt_len) { 1344 usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL); 1345 if (!usbtouch->buffer) 1346 goto out_free_buffers; 1347 } 1348 1349 usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL); 1350 if (!usbtouch->irq) { 1351 dbg("%s - usb_alloc_urb failed: usbtouch->irq", __func__); 1352 goto out_free_buffers; 1353 } 1354 1355 usbtouch->interface = intf; 1356 usbtouch->input = input_dev; 1357 1358 if (udev->manufacturer) 1359 strlcpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name)); 1360 1361 if (udev->product) { 1362 if (udev->manufacturer) 1363 strlcat(usbtouch->name, " ", sizeof(usbtouch->name)); 1364 strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name)); 1365 } 1366 1367 if (!strlen(usbtouch->name)) 1368 snprintf(usbtouch->name, sizeof(usbtouch->name), 1369 "USB Touchscreen %04x:%04x", 1370 le16_to_cpu(udev->descriptor.idVendor), 1371 le16_to_cpu(udev->descriptor.idProduct)); 1372 1373 usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys)); 1374 strlcat(usbtouch->phys, "/input0", sizeof(usbtouch->phys)); 1375 1376 input_dev->name = usbtouch->name; 1377 input_dev->phys = usbtouch->phys; 1378 usb_to_input_id(udev, &input_dev->id); 1379 input_dev->dev.parent = &intf->dev; 1380 1381 input_set_drvdata(input_dev, usbtouch); 1382 1383 input_dev->open = usbtouch_open; 1384 input_dev->close = usbtouch_close; 1385 1386 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); 1387 input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH); 1388 input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0); 1389 input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0); 1390 if (type->max_press) 1391 input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press, 1392 type->max_press, 0, 0); 1393 1394 if (usb_endpoint_type(endpoint) == USB_ENDPOINT_XFER_INT) 1395 usb_fill_int_urb(usbtouch->irq, udev, 1396 usb_rcvintpipe(udev, endpoint->bEndpointAddress), 1397 usbtouch->data, type->rept_size, 1398 usbtouch_irq, usbtouch, endpoint->bInterval); 1399 else 1400 usb_fill_bulk_urb(usbtouch->irq, udev, 1401 usb_rcvbulkpipe(udev, endpoint->bEndpointAddress), 1402 usbtouch->data, type->rept_size, 1403 usbtouch_irq, usbtouch); 1404 1405 usbtouch->irq->dev = udev; 1406 usbtouch->irq->transfer_dma = usbtouch->data_dma; 1407 usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1408 1409 /* device specific init */ 1410 if (type->init) { 1411 err = type->init(usbtouch); 1412 if (err) { 1413 dbg("%s - type->init() failed, err: %d", __func__, err); 1414 goto out_free_urb; 1415 } 1416 } 1417 1418 err = input_register_device(usbtouch->input); 1419 if (err) { 1420 dbg("%s - input_register_device failed, err: %d", __func__, err); 1421 goto out_do_exit; 1422 } 1423 1424 usb_set_intfdata(intf, usbtouch); 1425 1426 if (usbtouch->type->irq_always) { 1427 err = usb_submit_urb(usbtouch->irq, GFP_KERNEL); 1428 if (err) { 1429 err("%s - usb_submit_urb failed with result: %d", 1430 __func__, err); 1431 goto out_unregister_input; 1432 } 1433 } 1434 1435 return 0; 1436 1437 out_unregister_input: 1438 input_unregister_device(input_dev); 1439 input_dev = NULL; 1440 out_do_exit: 1441 if (type->exit) 1442 type->exit(usbtouch); 1443 out_free_urb: 1444 usb_free_urb(usbtouch->irq); 1445 out_free_buffers: 1446 usbtouch_free_buffers(udev, usbtouch); 1447 out_free: 1448 input_free_device(input_dev); 1449 kfree(usbtouch); 1450 return err; 1451 } 1452 1453 static void usbtouch_disconnect(struct usb_interface *intf) 1454 { 1455 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf); 1456 1457 dbg("%s - called", __func__); 1458 1459 if (!usbtouch) 1460 return; 1461 1462 dbg("%s - usbtouch is initialized, cleaning up", __func__); 1463 usb_set_intfdata(intf, NULL); 1464 /* this will stop IO via close */ 1465 input_unregister_device(usbtouch->input); 1466 usb_free_urb(usbtouch->irq); 1467 if (usbtouch->type->exit) 1468 usbtouch->type->exit(usbtouch); 1469 usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch); 1470 kfree(usbtouch); 1471 } 1472 1473 MODULE_DEVICE_TABLE(usb, usbtouch_devices); 1474 1475 static struct usb_driver usbtouch_driver = { 1476 .name = "usbtouchscreen", 1477 .probe = usbtouch_probe, 1478 .disconnect = usbtouch_disconnect, 1479 .id_table = usbtouch_devices, 1480 }; 1481 1482 static int __init usbtouch_init(void) 1483 { 1484 return usb_register(&usbtouch_driver); 1485 } 1486 1487 static void __exit usbtouch_cleanup(void) 1488 { 1489 usb_deregister(&usbtouch_driver); 1490 } 1491 1492 module_init(usbtouch_init); 1493 module_exit(usbtouch_cleanup); 1494 1495 MODULE_AUTHOR(DRIVER_AUTHOR); 1496 MODULE_DESCRIPTION(DRIVER_DESC); 1497 MODULE_LICENSE("GPL"); 1498 1499 MODULE_ALIAS("touchkitusb"); 1500 MODULE_ALIAS("itmtouch"); 1501 MODULE_ALIAS("mtouchusb"); 1502