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 * - Elo TouchSystems 2700 IntelliTouch 20 * - EasyTouch USB Dual/Multi touch controller from Data Modul 21 * 22 * Copyright (C) 2004-2007 by Daniel Ritz <daniel.ritz@gmx.ch> 23 * Copyright (C) by Todd E. Johnson (mtouchusb.c) 24 * 25 * This program is free software; you can redistribute it and/or 26 * modify it under the terms of the GNU General Public License as 27 * published by the Free Software Foundation; either version 2 of the 28 * License, or (at your option) any later version. 29 * 30 * This program is distributed in the hope that it will be useful, but 31 * WITHOUT ANY WARRANTY; without even the implied warranty of 32 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 33 * General Public License for more details. 34 * 35 * You should have received a copy of the GNU General Public License 36 * along with this program; if not, write to the Free Software 37 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 38 * 39 * Driver is based on touchkitusb.c 40 * - ITM parts are from itmtouch.c 41 * - 3M parts are from mtouchusb.c 42 * - PanJit parts are from an unmerged driver by Lanslott Gish 43 * - DMC TSC 10/25 are from Holger Schurig, with ideas from an unmerged 44 * driver from Marius Vollmer 45 * 46 *****************************************************************************/ 47 48 //#define DEBUG 49 50 #include <linux/kernel.h> 51 #include <linux/slab.h> 52 #include <linux/input.h> 53 #include <linux/module.h> 54 #include <linux/usb.h> 55 #include <linux/usb/input.h> 56 #include <linux/hid.h> 57 58 59 #define DRIVER_VERSION "v0.6" 60 #define DRIVER_AUTHOR "Daniel Ritz <daniel.ritz@gmx.ch>" 61 #define DRIVER_DESC "USB Touchscreen Driver" 62 63 static bool swap_xy; 64 module_param(swap_xy, bool, 0644); 65 MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped."); 66 67 static bool hwcalib_xy; 68 module_param(hwcalib_xy, bool, 0644); 69 MODULE_PARM_DESC(hwcalib_xy, "If set hw-calibrated X/Y are used if available"); 70 71 /* device specifc data/functions */ 72 struct usbtouch_usb; 73 struct usbtouch_device_info { 74 int min_xc, max_xc; 75 int min_yc, max_yc; 76 int min_press, max_press; 77 int rept_size; 78 79 /* 80 * Always service the USB devices irq not just when the input device is 81 * open. This is useful when devices have a watchdog which prevents us 82 * from periodically polling the device. Leave this unset unless your 83 * touchscreen device requires it, as it does consume more of the USB 84 * bandwidth. 85 */ 86 bool irq_always; 87 88 void (*process_pkt) (struct usbtouch_usb *usbtouch, unsigned char *pkt, int len); 89 90 /* 91 * used to get the packet len. possible return values: 92 * > 0: packet len 93 * = 0: skip one byte 94 * < 0: -return value more bytes needed 95 */ 96 int (*get_pkt_len) (unsigned char *pkt, int len); 97 98 int (*read_data) (struct usbtouch_usb *usbtouch, unsigned char *pkt); 99 int (*alloc) (struct usbtouch_usb *usbtouch); 100 int (*init) (struct usbtouch_usb *usbtouch); 101 void (*exit) (struct usbtouch_usb *usbtouch); 102 }; 103 104 /* a usbtouch device */ 105 struct usbtouch_usb { 106 unsigned char *data; 107 dma_addr_t data_dma; 108 int data_size; 109 unsigned char *buffer; 110 int buf_len; 111 struct urb *irq; 112 struct usb_interface *interface; 113 struct input_dev *input; 114 struct usbtouch_device_info *type; 115 char name[128]; 116 char phys[64]; 117 void *priv; 118 119 int x, y; 120 int touch, press; 121 }; 122 123 124 /* device types */ 125 enum { 126 DEVTYPE_IGNORE = -1, 127 DEVTYPE_EGALAX, 128 DEVTYPE_PANJIT, 129 DEVTYPE_3M, 130 DEVTYPE_ITM, 131 DEVTYPE_ETURBO, 132 DEVTYPE_GUNZE, 133 DEVTYPE_DMC_TSC10, 134 DEVTYPE_IRTOUCH, 135 DEVTYPE_IDEALTEK, 136 DEVTYPE_GENERAL_TOUCH, 137 DEVTYPE_GOTOP, 138 DEVTYPE_JASTEC, 139 DEVTYPE_E2I, 140 DEVTYPE_ZYTRONIC, 141 DEVTYPE_TC45USB, 142 DEVTYPE_NEXIO, 143 DEVTYPE_ELO, 144 DEVTYPE_ETOUCH, 145 }; 146 147 #define USB_DEVICE_HID_CLASS(vend, prod) \ 148 .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS \ 149 | USB_DEVICE_ID_MATCH_DEVICE, \ 150 .idVendor = (vend), \ 151 .idProduct = (prod), \ 152 .bInterfaceClass = USB_INTERFACE_CLASS_HID 153 154 static const struct usb_device_id usbtouch_devices[] = { 155 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX 156 /* ignore the HID capable devices, handled by usbhid */ 157 {USB_DEVICE_HID_CLASS(0x0eef, 0x0001), .driver_info = DEVTYPE_IGNORE}, 158 {USB_DEVICE_HID_CLASS(0x0eef, 0x0002), .driver_info = DEVTYPE_IGNORE}, 159 160 /* normal device IDs */ 161 {USB_DEVICE(0x3823, 0x0001), .driver_info = DEVTYPE_EGALAX}, 162 {USB_DEVICE(0x3823, 0x0002), .driver_info = DEVTYPE_EGALAX}, 163 {USB_DEVICE(0x0123, 0x0001), .driver_info = DEVTYPE_EGALAX}, 164 {USB_DEVICE(0x0eef, 0x0001), .driver_info = DEVTYPE_EGALAX}, 165 {USB_DEVICE(0x0eef, 0x0002), .driver_info = DEVTYPE_EGALAX}, 166 {USB_DEVICE(0x1234, 0x0001), .driver_info = DEVTYPE_EGALAX}, 167 {USB_DEVICE(0x1234, 0x0002), .driver_info = DEVTYPE_EGALAX}, 168 #endif 169 170 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT 171 {USB_DEVICE(0x134c, 0x0001), .driver_info = DEVTYPE_PANJIT}, 172 {USB_DEVICE(0x134c, 0x0002), .driver_info = DEVTYPE_PANJIT}, 173 {USB_DEVICE(0x134c, 0x0003), .driver_info = DEVTYPE_PANJIT}, 174 {USB_DEVICE(0x134c, 0x0004), .driver_info = DEVTYPE_PANJIT}, 175 #endif 176 177 #ifdef CONFIG_TOUCHSCREEN_USB_3M 178 {USB_DEVICE(0x0596, 0x0001), .driver_info = DEVTYPE_3M}, 179 #endif 180 181 #ifdef CONFIG_TOUCHSCREEN_USB_ITM 182 {USB_DEVICE(0x0403, 0xf9e9), .driver_info = DEVTYPE_ITM}, 183 {USB_DEVICE(0x16e3, 0xf9e9), .driver_info = DEVTYPE_ITM}, 184 #endif 185 186 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO 187 {USB_DEVICE(0x1234, 0x5678), .driver_info = DEVTYPE_ETURBO}, 188 #endif 189 190 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE 191 {USB_DEVICE(0x0637, 0x0001), .driver_info = DEVTYPE_GUNZE}, 192 #endif 193 194 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10 195 {USB_DEVICE(0x0afa, 0x03e8), .driver_info = DEVTYPE_DMC_TSC10}, 196 #endif 197 198 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH 199 {USB_DEVICE(0x595a, 0x0001), .driver_info = DEVTYPE_IRTOUCH}, 200 {USB_DEVICE(0x6615, 0x0001), .driver_info = DEVTYPE_IRTOUCH}, 201 #endif 202 203 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK 204 {USB_DEVICE(0x1391, 0x1000), .driver_info = DEVTYPE_IDEALTEK}, 205 #endif 206 207 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH 208 {USB_DEVICE(0x0dfc, 0x0001), .driver_info = DEVTYPE_GENERAL_TOUCH}, 209 #endif 210 211 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP 212 {USB_DEVICE(0x08f2, 0x007f), .driver_info = DEVTYPE_GOTOP}, 213 {USB_DEVICE(0x08f2, 0x00ce), .driver_info = DEVTYPE_GOTOP}, 214 {USB_DEVICE(0x08f2, 0x00f4), .driver_info = DEVTYPE_GOTOP}, 215 #endif 216 217 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC 218 {USB_DEVICE(0x0f92, 0x0001), .driver_info = DEVTYPE_JASTEC}, 219 #endif 220 221 #ifdef CONFIG_TOUCHSCREEN_USB_E2I 222 {USB_DEVICE(0x1ac7, 0x0001), .driver_info = DEVTYPE_E2I}, 223 #endif 224 225 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC 226 {USB_DEVICE(0x14c8, 0x0003), .driver_info = DEVTYPE_ZYTRONIC}, 227 #endif 228 229 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB 230 /* TC5UH */ 231 {USB_DEVICE(0x0664, 0x0309), .driver_info = DEVTYPE_TC45USB}, 232 /* TC4UM */ 233 {USB_DEVICE(0x0664, 0x0306), .driver_info = DEVTYPE_TC45USB}, 234 #endif 235 236 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO 237 /* data interface only */ 238 {USB_DEVICE_AND_INTERFACE_INFO(0x10f0, 0x2002, 0x0a, 0x00, 0x00), 239 .driver_info = DEVTYPE_NEXIO}, 240 {USB_DEVICE_AND_INTERFACE_INFO(0x1870, 0x0001, 0x0a, 0x00, 0x00), 241 .driver_info = DEVTYPE_NEXIO}, 242 #endif 243 244 #ifdef CONFIG_TOUCHSCREEN_USB_ELO 245 {USB_DEVICE(0x04e7, 0x0020), .driver_info = DEVTYPE_ELO}, 246 #endif 247 248 #ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH 249 {USB_DEVICE(0x7374, 0x0001), .driver_info = DEVTYPE_ETOUCH}, 250 #endif 251 252 {} 253 }; 254 255 256 /***************************************************************************** 257 * e2i Part 258 */ 259 260 #ifdef CONFIG_TOUCHSCREEN_USB_E2I 261 static int e2i_init(struct usbtouch_usb *usbtouch) 262 { 263 int ret; 264 struct usb_device *udev = interface_to_usbdev(usbtouch->interface); 265 266 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 267 0x01, 0x02, 0x0000, 0x0081, 268 NULL, 0, USB_CTRL_SET_TIMEOUT); 269 270 dev_dbg(&usbtouch->interface->dev, 271 "%s - usb_control_msg - E2I_RESET - bytes|err: %d\n", 272 __func__, ret); 273 return ret; 274 } 275 276 static int e2i_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 277 { 278 int tmp = (pkt[0] << 8) | pkt[1]; 279 dev->x = (pkt[2] << 8) | pkt[3]; 280 dev->y = (pkt[4] << 8) | pkt[5]; 281 282 tmp = tmp - 0xA000; 283 dev->touch = (tmp > 0); 284 dev->press = (tmp > 0 ? tmp : 0); 285 286 return 1; 287 } 288 #endif 289 290 291 /***************************************************************************** 292 * eGalax part 293 */ 294 295 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX 296 297 #ifndef MULTI_PACKET 298 #define MULTI_PACKET 299 #endif 300 301 #define EGALAX_PKT_TYPE_MASK 0xFE 302 #define EGALAX_PKT_TYPE_REPT 0x80 303 #define EGALAX_PKT_TYPE_DIAG 0x0A 304 305 static int egalax_init(struct usbtouch_usb *usbtouch) 306 { 307 int ret, i; 308 unsigned char *buf; 309 struct usb_device *udev = interface_to_usbdev(usbtouch->interface); 310 311 /* 312 * An eGalax diagnostic packet kicks the device into using the right 313 * protocol. We send a "check active" packet. The response will be 314 * read later and ignored. 315 */ 316 317 buf = kmalloc(3, GFP_KERNEL); 318 if (!buf) 319 return -ENOMEM; 320 321 buf[0] = EGALAX_PKT_TYPE_DIAG; 322 buf[1] = 1; /* length */ 323 buf[2] = 'A'; /* command - check active */ 324 325 for (i = 0; i < 3; i++) { 326 ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 327 0, 328 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 329 0, 0, buf, 3, 330 USB_CTRL_SET_TIMEOUT); 331 if (ret >= 0) { 332 ret = 0; 333 break; 334 } 335 if (ret != -EPIPE) 336 break; 337 } 338 339 kfree(buf); 340 341 return ret; 342 } 343 344 static int egalax_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 345 { 346 if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT) 347 return 0; 348 349 dev->x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F); 350 dev->y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F); 351 dev->touch = pkt[0] & 0x01; 352 353 return 1; 354 } 355 356 static int egalax_get_pkt_len(unsigned char *buf, int len) 357 { 358 switch (buf[0] & EGALAX_PKT_TYPE_MASK) { 359 case EGALAX_PKT_TYPE_REPT: 360 return 5; 361 362 case EGALAX_PKT_TYPE_DIAG: 363 if (len < 2) 364 return -1; 365 366 return buf[1] + 2; 367 } 368 369 return 0; 370 } 371 #endif 372 373 /***************************************************************************** 374 * EasyTouch part 375 */ 376 377 #ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH 378 379 #ifndef MULTI_PACKET 380 #define MULTI_PACKET 381 #endif 382 383 #define ETOUCH_PKT_TYPE_MASK 0xFE 384 #define ETOUCH_PKT_TYPE_REPT 0x80 385 #define ETOUCH_PKT_TYPE_REPT2 0xB0 386 #define ETOUCH_PKT_TYPE_DIAG 0x0A 387 388 static int etouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 389 { 390 if ((pkt[0] & ETOUCH_PKT_TYPE_MASK) != ETOUCH_PKT_TYPE_REPT && 391 (pkt[0] & ETOUCH_PKT_TYPE_MASK) != ETOUCH_PKT_TYPE_REPT2) 392 return 0; 393 394 dev->x = ((pkt[1] & 0x1F) << 7) | (pkt[2] & 0x7F); 395 dev->y = ((pkt[3] & 0x1F) << 7) | (pkt[4] & 0x7F); 396 dev->touch = pkt[0] & 0x01; 397 398 return 1; 399 } 400 401 static int etouch_get_pkt_len(unsigned char *buf, int len) 402 { 403 switch (buf[0] & ETOUCH_PKT_TYPE_MASK) { 404 case ETOUCH_PKT_TYPE_REPT: 405 case ETOUCH_PKT_TYPE_REPT2: 406 return 5; 407 408 case ETOUCH_PKT_TYPE_DIAG: 409 if (len < 2) 410 return -1; 411 412 return buf[1] + 2; 413 } 414 415 return 0; 416 } 417 #endif 418 419 /***************************************************************************** 420 * PanJit Part 421 */ 422 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT 423 static int panjit_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 424 { 425 dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1]; 426 dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3]; 427 dev->touch = pkt[0] & 0x01; 428 429 return 1; 430 } 431 #endif 432 433 434 /***************************************************************************** 435 * 3M/Microtouch Part 436 */ 437 #ifdef CONFIG_TOUCHSCREEN_USB_3M 438 439 #define MTOUCHUSB_ASYNC_REPORT 1 440 #define MTOUCHUSB_RESET 7 441 #define MTOUCHUSB_REQ_CTRLLR_ID 10 442 443 static int mtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 444 { 445 if (hwcalib_xy) { 446 dev->x = (pkt[4] << 8) | pkt[3]; 447 dev->y = 0xffff - ((pkt[6] << 8) | pkt[5]); 448 } else { 449 dev->x = (pkt[8] << 8) | pkt[7]; 450 dev->y = (pkt[10] << 8) | pkt[9]; 451 } 452 dev->touch = (pkt[2] & 0x40) ? 1 : 0; 453 454 return 1; 455 } 456 457 static int mtouch_init(struct usbtouch_usb *usbtouch) 458 { 459 int ret, i; 460 struct usb_device *udev = interface_to_usbdev(usbtouch->interface); 461 462 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 463 MTOUCHUSB_RESET, 464 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 465 1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT); 466 dev_dbg(&usbtouch->interface->dev, 467 "%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d\n", 468 __func__, ret); 469 if (ret < 0) 470 return ret; 471 msleep(150); 472 473 for (i = 0; i < 3; i++) { 474 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 475 MTOUCHUSB_ASYNC_REPORT, 476 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 477 1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT); 478 dev_dbg(&usbtouch->interface->dev, 479 "%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d\n", 480 __func__, ret); 481 if (ret >= 0) 482 break; 483 if (ret != -EPIPE) 484 return ret; 485 } 486 487 /* Default min/max xy are the raw values, override if using hw-calib */ 488 if (hwcalib_xy) { 489 input_set_abs_params(usbtouch->input, ABS_X, 0, 0xffff, 0, 0); 490 input_set_abs_params(usbtouch->input, ABS_Y, 0, 0xffff, 0, 0); 491 } 492 493 return 0; 494 } 495 #endif 496 497 498 /***************************************************************************** 499 * ITM Part 500 */ 501 #ifdef CONFIG_TOUCHSCREEN_USB_ITM 502 static int itm_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 503 { 504 int touch; 505 /* 506 * ITM devices report invalid x/y data if not touched. 507 * if the screen was touched before but is not touched any more 508 * report touch as 0 with the last valid x/y data once. then stop 509 * reporting data until touched again. 510 */ 511 dev->press = ((pkt[2] & 0x01) << 7) | (pkt[5] & 0x7F); 512 513 touch = ~pkt[7] & 0x20; 514 if (!touch) { 515 if (dev->touch) { 516 dev->touch = 0; 517 return 1; 518 } 519 520 return 0; 521 } 522 523 dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F); 524 dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F); 525 dev->touch = touch; 526 527 return 1; 528 } 529 #endif 530 531 532 /***************************************************************************** 533 * eTurboTouch part 534 */ 535 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO 536 #ifndef MULTI_PACKET 537 #define MULTI_PACKET 538 #endif 539 static int eturbo_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 540 { 541 unsigned int shift; 542 543 /* packets should start with sync */ 544 if (!(pkt[0] & 0x80)) 545 return 0; 546 547 shift = (6 - (pkt[0] & 0x03)); 548 dev->x = ((pkt[3] << 7) | pkt[4]) >> shift; 549 dev->y = ((pkt[1] << 7) | pkt[2]) >> shift; 550 dev->touch = (pkt[0] & 0x10) ? 1 : 0; 551 552 return 1; 553 } 554 555 static int eturbo_get_pkt_len(unsigned char *buf, int len) 556 { 557 if (buf[0] & 0x80) 558 return 5; 559 if (buf[0] == 0x01) 560 return 3; 561 return 0; 562 } 563 #endif 564 565 566 /***************************************************************************** 567 * Gunze part 568 */ 569 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE 570 static int gunze_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 571 { 572 if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80)) 573 return 0; 574 575 dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F); 576 dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F); 577 dev->touch = pkt[0] & 0x20; 578 579 return 1; 580 } 581 #endif 582 583 /***************************************************************************** 584 * DMC TSC-10/25 Part 585 * 586 * Documentation about the controller and it's protocol can be found at 587 * http://www.dmccoltd.com/files/controler/tsc10usb_pi_e.pdf 588 * http://www.dmccoltd.com/files/controler/tsc25_usb_e.pdf 589 */ 590 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10 591 592 /* supported data rates. currently using 130 */ 593 #define TSC10_RATE_POINT 0x50 594 #define TSC10_RATE_30 0x40 595 #define TSC10_RATE_50 0x41 596 #define TSC10_RATE_80 0x42 597 #define TSC10_RATE_100 0x43 598 #define TSC10_RATE_130 0x44 599 #define TSC10_RATE_150 0x45 600 601 /* commands */ 602 #define TSC10_CMD_RESET 0x55 603 #define TSC10_CMD_RATE 0x05 604 #define TSC10_CMD_DATA1 0x01 605 606 static int dmc_tsc10_init(struct usbtouch_usb *usbtouch) 607 { 608 struct usb_device *dev = interface_to_usbdev(usbtouch->interface); 609 int ret = -ENOMEM; 610 unsigned char *buf; 611 612 buf = kmalloc(2, GFP_NOIO); 613 if (!buf) 614 goto err_nobuf; 615 /* reset */ 616 buf[0] = buf[1] = 0xFF; 617 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0), 618 TSC10_CMD_RESET, 619 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 620 0, 0, buf, 2, USB_CTRL_SET_TIMEOUT); 621 if (ret < 0) 622 goto err_out; 623 if (buf[0] != 0x06) { 624 ret = -ENODEV; 625 goto err_out; 626 } 627 628 /* set coordinate output rate */ 629 buf[0] = buf[1] = 0xFF; 630 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0), 631 TSC10_CMD_RATE, 632 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 633 TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT); 634 if (ret < 0) 635 goto err_out; 636 if ((buf[0] != 0x06) && (buf[0] != 0x15 || buf[1] != 0x01)) { 637 ret = -ENODEV; 638 goto err_out; 639 } 640 641 /* start sending data */ 642 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0), 643 TSC10_CMD_DATA1, 644 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 645 0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT); 646 err_out: 647 kfree(buf); 648 err_nobuf: 649 return ret; 650 } 651 652 653 static int dmc_tsc10_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 654 { 655 dev->x = ((pkt[2] & 0x03) << 8) | pkt[1]; 656 dev->y = ((pkt[4] & 0x03) << 8) | pkt[3]; 657 dev->touch = pkt[0] & 0x01; 658 659 return 1; 660 } 661 #endif 662 663 664 /***************************************************************************** 665 * IRTOUCH Part 666 */ 667 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH 668 static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 669 { 670 dev->x = (pkt[3] << 8) | pkt[2]; 671 dev->y = (pkt[5] << 8) | pkt[4]; 672 dev->touch = (pkt[1] & 0x03) ? 1 : 0; 673 674 return 1; 675 } 676 #endif 677 678 /***************************************************************************** 679 * ET&T TC5UH/TC4UM part 680 */ 681 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB 682 static int tc45usb_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 683 { 684 dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1]; 685 dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3]; 686 dev->touch = pkt[0] & 0x01; 687 688 return 1; 689 } 690 #endif 691 692 /***************************************************************************** 693 * IdealTEK URTC1000 Part 694 */ 695 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK 696 #ifndef MULTI_PACKET 697 #define MULTI_PACKET 698 #endif 699 static int idealtek_get_pkt_len(unsigned char *buf, int len) 700 { 701 if (buf[0] & 0x80) 702 return 5; 703 if (buf[0] == 0x01) 704 return len; 705 return 0; 706 } 707 708 static int idealtek_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 709 { 710 switch (pkt[0] & 0x98) { 711 case 0x88: 712 /* touch data in IdealTEK mode */ 713 dev->x = (pkt[1] << 5) | (pkt[2] >> 2); 714 dev->y = (pkt[3] << 5) | (pkt[4] >> 2); 715 dev->touch = (pkt[0] & 0x40) ? 1 : 0; 716 return 1; 717 718 case 0x98: 719 /* touch data in MT emulation mode */ 720 dev->x = (pkt[2] << 5) | (pkt[1] >> 2); 721 dev->y = (pkt[4] << 5) | (pkt[3] >> 2); 722 dev->touch = (pkt[0] & 0x40) ? 1 : 0; 723 return 1; 724 725 default: 726 return 0; 727 } 728 } 729 #endif 730 731 /***************************************************************************** 732 * General Touch Part 733 */ 734 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH 735 static int general_touch_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 736 { 737 dev->x = (pkt[2] << 8) | pkt[1]; 738 dev->y = (pkt[4] << 8) | pkt[3]; 739 dev->press = pkt[5] & 0xff; 740 dev->touch = pkt[0] & 0x01; 741 742 return 1; 743 } 744 #endif 745 746 /***************************************************************************** 747 * GoTop Part 748 */ 749 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP 750 static int gotop_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 751 { 752 dev->x = ((pkt[1] & 0x38) << 4) | pkt[2]; 753 dev->y = ((pkt[1] & 0x07) << 7) | pkt[3]; 754 dev->touch = pkt[0] & 0x01; 755 756 return 1; 757 } 758 #endif 759 760 /***************************************************************************** 761 * JASTEC Part 762 */ 763 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC 764 static int jastec_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 765 { 766 dev->x = ((pkt[0] & 0x3f) << 6) | (pkt[2] & 0x3f); 767 dev->y = ((pkt[1] & 0x3f) << 6) | (pkt[3] & 0x3f); 768 dev->touch = (pkt[0] & 0x40) >> 6; 769 770 return 1; 771 } 772 #endif 773 774 /***************************************************************************** 775 * Zytronic Part 776 */ 777 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC 778 static int zytronic_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 779 { 780 struct usb_interface *intf = dev->interface; 781 782 switch (pkt[0]) { 783 case 0x3A: /* command response */ 784 dev_dbg(&intf->dev, "%s: Command response %d\n", __func__, pkt[1]); 785 break; 786 787 case 0xC0: /* down */ 788 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7); 789 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7); 790 dev->touch = 1; 791 dev_dbg(&intf->dev, "%s: down %d,%d\n", __func__, dev->x, dev->y); 792 return 1; 793 794 case 0x80: /* up */ 795 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7); 796 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7); 797 dev->touch = 0; 798 dev_dbg(&intf->dev, "%s: up %d,%d\n", __func__, dev->x, dev->y); 799 return 1; 800 801 default: 802 dev_dbg(&intf->dev, "%s: Unknown return %d\n", __func__, pkt[0]); 803 break; 804 } 805 806 return 0; 807 } 808 #endif 809 810 /***************************************************************************** 811 * NEXIO Part 812 */ 813 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO 814 815 #define NEXIO_TIMEOUT 5000 816 #define NEXIO_BUFSIZE 1024 817 #define NEXIO_THRESHOLD 50 818 819 struct nexio_priv { 820 struct urb *ack; 821 unsigned char *ack_buf; 822 }; 823 824 struct nexio_touch_packet { 825 u8 flags; /* 0xe1 = touch, 0xe1 = release */ 826 __be16 data_len; /* total bytes of touch data */ 827 __be16 x_len; /* bytes for X axis */ 828 __be16 y_len; /* bytes for Y axis */ 829 u8 data[]; 830 } __attribute__ ((packed)); 831 832 static unsigned char nexio_ack_pkt[2] = { 0xaa, 0x02 }; 833 static unsigned char nexio_init_pkt[4] = { 0x82, 0x04, 0x0a, 0x0f }; 834 835 static void nexio_ack_complete(struct urb *urb) 836 { 837 } 838 839 static int nexio_alloc(struct usbtouch_usb *usbtouch) 840 { 841 struct nexio_priv *priv; 842 int ret = -ENOMEM; 843 844 usbtouch->priv = kmalloc(sizeof(struct nexio_priv), GFP_KERNEL); 845 if (!usbtouch->priv) 846 goto out_buf; 847 848 priv = usbtouch->priv; 849 850 priv->ack_buf = kmemdup(nexio_ack_pkt, sizeof(nexio_ack_pkt), 851 GFP_KERNEL); 852 if (!priv->ack_buf) 853 goto err_priv; 854 855 priv->ack = usb_alloc_urb(0, GFP_KERNEL); 856 if (!priv->ack) { 857 dev_dbg(&usbtouch->interface->dev, 858 "%s - usb_alloc_urb failed: usbtouch->ack\n", __func__); 859 goto err_ack_buf; 860 } 861 862 return 0; 863 864 err_ack_buf: 865 kfree(priv->ack_buf); 866 err_priv: 867 kfree(priv); 868 out_buf: 869 return ret; 870 } 871 872 static int nexio_init(struct usbtouch_usb *usbtouch) 873 { 874 struct usb_device *dev = interface_to_usbdev(usbtouch->interface); 875 struct usb_host_interface *interface = usbtouch->interface->cur_altsetting; 876 struct nexio_priv *priv = usbtouch->priv; 877 int ret = -ENOMEM; 878 int actual_len, i; 879 unsigned char *buf; 880 char *firmware_ver = NULL, *device_name = NULL; 881 int input_ep = 0, output_ep = 0; 882 883 /* find first input and output endpoint */ 884 for (i = 0; i < interface->desc.bNumEndpoints; i++) { 885 if (!input_ep && 886 usb_endpoint_dir_in(&interface->endpoint[i].desc)) 887 input_ep = interface->endpoint[i].desc.bEndpointAddress; 888 if (!output_ep && 889 usb_endpoint_dir_out(&interface->endpoint[i].desc)) 890 output_ep = interface->endpoint[i].desc.bEndpointAddress; 891 } 892 if (!input_ep || !output_ep) 893 return -ENXIO; 894 895 buf = kmalloc(NEXIO_BUFSIZE, GFP_NOIO); 896 if (!buf) 897 goto out_buf; 898 899 /* two empty reads */ 900 for (i = 0; i < 2; i++) { 901 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep), 902 buf, NEXIO_BUFSIZE, &actual_len, 903 NEXIO_TIMEOUT); 904 if (ret < 0) 905 goto out_buf; 906 } 907 908 /* send init command */ 909 memcpy(buf, nexio_init_pkt, sizeof(nexio_init_pkt)); 910 ret = usb_bulk_msg(dev, usb_sndbulkpipe(dev, output_ep), 911 buf, sizeof(nexio_init_pkt), &actual_len, 912 NEXIO_TIMEOUT); 913 if (ret < 0) 914 goto out_buf; 915 916 /* read replies */ 917 for (i = 0; i < 3; i++) { 918 memset(buf, 0, NEXIO_BUFSIZE); 919 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep), 920 buf, NEXIO_BUFSIZE, &actual_len, 921 NEXIO_TIMEOUT); 922 if (ret < 0 || actual_len < 1 || buf[1] != actual_len) 923 continue; 924 switch (buf[0]) { 925 case 0x83: /* firmware version */ 926 if (!firmware_ver) 927 firmware_ver = kstrdup(&buf[2], GFP_NOIO); 928 break; 929 case 0x84: /* device name */ 930 if (!device_name) 931 device_name = kstrdup(&buf[2], GFP_NOIO); 932 break; 933 } 934 } 935 936 printk(KERN_INFO "Nexio device: %s, firmware version: %s\n", 937 device_name, firmware_ver); 938 939 kfree(firmware_ver); 940 kfree(device_name); 941 942 usb_fill_bulk_urb(priv->ack, dev, usb_sndbulkpipe(dev, output_ep), 943 priv->ack_buf, sizeof(nexio_ack_pkt), 944 nexio_ack_complete, usbtouch); 945 ret = 0; 946 947 out_buf: 948 kfree(buf); 949 return ret; 950 } 951 952 static void nexio_exit(struct usbtouch_usb *usbtouch) 953 { 954 struct nexio_priv *priv = usbtouch->priv; 955 956 usb_kill_urb(priv->ack); 957 usb_free_urb(priv->ack); 958 kfree(priv->ack_buf); 959 kfree(priv); 960 } 961 962 static int nexio_read_data(struct usbtouch_usb *usbtouch, unsigned char *pkt) 963 { 964 struct nexio_touch_packet *packet = (void *) pkt; 965 struct nexio_priv *priv = usbtouch->priv; 966 unsigned int data_len = be16_to_cpu(packet->data_len); 967 unsigned int x_len = be16_to_cpu(packet->x_len); 968 unsigned int y_len = be16_to_cpu(packet->y_len); 969 int x, y, begin_x, begin_y, end_x, end_y, w, h, ret; 970 971 /* got touch data? */ 972 if ((pkt[0] & 0xe0) != 0xe0) 973 return 0; 974 975 if (data_len > 0xff) 976 data_len -= 0x100; 977 if (x_len > 0xff) 978 x_len -= 0x80; 979 980 /* send ACK */ 981 ret = usb_submit_urb(priv->ack, GFP_ATOMIC); 982 983 if (!usbtouch->type->max_xc) { 984 usbtouch->type->max_xc = 2 * x_len; 985 input_set_abs_params(usbtouch->input, ABS_X, 986 0, usbtouch->type->max_xc, 0, 0); 987 usbtouch->type->max_yc = 2 * y_len; 988 input_set_abs_params(usbtouch->input, ABS_Y, 989 0, usbtouch->type->max_yc, 0, 0); 990 } 991 /* 992 * The device reports state of IR sensors on X and Y axes. 993 * Each byte represents "darkness" percentage (0-100) of one element. 994 * 17" touchscreen reports only 64 x 52 bytes so the resolution is low. 995 * This also means that there's a limited multi-touch capability but 996 * it's disabled (and untested) here as there's no X driver for that. 997 */ 998 begin_x = end_x = begin_y = end_y = -1; 999 for (x = 0; x < x_len; x++) { 1000 if (begin_x == -1 && packet->data[x] > NEXIO_THRESHOLD) { 1001 begin_x = x; 1002 continue; 1003 } 1004 if (end_x == -1 && begin_x != -1 && packet->data[x] < NEXIO_THRESHOLD) { 1005 end_x = x - 1; 1006 for (y = x_len; y < data_len; y++) { 1007 if (begin_y == -1 && packet->data[y] > NEXIO_THRESHOLD) { 1008 begin_y = y - x_len; 1009 continue; 1010 } 1011 if (end_y == -1 && 1012 begin_y != -1 && packet->data[y] < NEXIO_THRESHOLD) { 1013 end_y = y - 1 - x_len; 1014 w = end_x - begin_x; 1015 h = end_y - begin_y; 1016 #if 0 1017 /* multi-touch */ 1018 input_report_abs(usbtouch->input, 1019 ABS_MT_TOUCH_MAJOR, max(w,h)); 1020 input_report_abs(usbtouch->input, 1021 ABS_MT_TOUCH_MINOR, min(x,h)); 1022 input_report_abs(usbtouch->input, 1023 ABS_MT_POSITION_X, 2*begin_x+w); 1024 input_report_abs(usbtouch->input, 1025 ABS_MT_POSITION_Y, 2*begin_y+h); 1026 input_report_abs(usbtouch->input, 1027 ABS_MT_ORIENTATION, w > h); 1028 input_mt_sync(usbtouch->input); 1029 #endif 1030 /* single touch */ 1031 usbtouch->x = 2 * begin_x + w; 1032 usbtouch->y = 2 * begin_y + h; 1033 usbtouch->touch = packet->flags & 0x01; 1034 begin_y = end_y = -1; 1035 return 1; 1036 } 1037 } 1038 begin_x = end_x = -1; 1039 } 1040 1041 } 1042 return 0; 1043 } 1044 #endif 1045 1046 1047 /***************************************************************************** 1048 * ELO part 1049 */ 1050 1051 #ifdef CONFIG_TOUCHSCREEN_USB_ELO 1052 1053 static int elo_read_data(struct usbtouch_usb *dev, unsigned char *pkt) 1054 { 1055 dev->x = (pkt[3] << 8) | pkt[2]; 1056 dev->y = (pkt[5] << 8) | pkt[4]; 1057 dev->touch = pkt[6] > 0; 1058 dev->press = pkt[6]; 1059 1060 return 1; 1061 } 1062 #endif 1063 1064 1065 /***************************************************************************** 1066 * the different device descriptors 1067 */ 1068 #ifdef MULTI_PACKET 1069 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch, 1070 unsigned char *pkt, int len); 1071 #endif 1072 1073 static struct usbtouch_device_info usbtouch_dev_info[] = { 1074 #ifdef CONFIG_TOUCHSCREEN_USB_ELO 1075 [DEVTYPE_ELO] = { 1076 .min_xc = 0x0, 1077 .max_xc = 0x0fff, 1078 .min_yc = 0x0, 1079 .max_yc = 0x0fff, 1080 .max_press = 0xff, 1081 .rept_size = 8, 1082 .read_data = elo_read_data, 1083 }, 1084 #endif 1085 1086 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX 1087 [DEVTYPE_EGALAX] = { 1088 .min_xc = 0x0, 1089 .max_xc = 0x07ff, 1090 .min_yc = 0x0, 1091 .max_yc = 0x07ff, 1092 .rept_size = 16, 1093 .process_pkt = usbtouch_process_multi, 1094 .get_pkt_len = egalax_get_pkt_len, 1095 .read_data = egalax_read_data, 1096 .init = egalax_init, 1097 }, 1098 #endif 1099 1100 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT 1101 [DEVTYPE_PANJIT] = { 1102 .min_xc = 0x0, 1103 .max_xc = 0x0fff, 1104 .min_yc = 0x0, 1105 .max_yc = 0x0fff, 1106 .rept_size = 8, 1107 .read_data = panjit_read_data, 1108 }, 1109 #endif 1110 1111 #ifdef CONFIG_TOUCHSCREEN_USB_3M 1112 [DEVTYPE_3M] = { 1113 .min_xc = 0x0, 1114 .max_xc = 0x4000, 1115 .min_yc = 0x0, 1116 .max_yc = 0x4000, 1117 .rept_size = 11, 1118 .read_data = mtouch_read_data, 1119 .init = mtouch_init, 1120 }, 1121 #endif 1122 1123 #ifdef CONFIG_TOUCHSCREEN_USB_ITM 1124 [DEVTYPE_ITM] = { 1125 .min_xc = 0x0, 1126 .max_xc = 0x0fff, 1127 .min_yc = 0x0, 1128 .max_yc = 0x0fff, 1129 .max_press = 0xff, 1130 .rept_size = 8, 1131 .read_data = itm_read_data, 1132 }, 1133 #endif 1134 1135 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO 1136 [DEVTYPE_ETURBO] = { 1137 .min_xc = 0x0, 1138 .max_xc = 0x07ff, 1139 .min_yc = 0x0, 1140 .max_yc = 0x07ff, 1141 .rept_size = 8, 1142 .process_pkt = usbtouch_process_multi, 1143 .get_pkt_len = eturbo_get_pkt_len, 1144 .read_data = eturbo_read_data, 1145 }, 1146 #endif 1147 1148 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE 1149 [DEVTYPE_GUNZE] = { 1150 .min_xc = 0x0, 1151 .max_xc = 0x0fff, 1152 .min_yc = 0x0, 1153 .max_yc = 0x0fff, 1154 .rept_size = 4, 1155 .read_data = gunze_read_data, 1156 }, 1157 #endif 1158 1159 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10 1160 [DEVTYPE_DMC_TSC10] = { 1161 .min_xc = 0x0, 1162 .max_xc = 0x03ff, 1163 .min_yc = 0x0, 1164 .max_yc = 0x03ff, 1165 .rept_size = 5, 1166 .init = dmc_tsc10_init, 1167 .read_data = dmc_tsc10_read_data, 1168 }, 1169 #endif 1170 1171 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH 1172 [DEVTYPE_IRTOUCH] = { 1173 .min_xc = 0x0, 1174 .max_xc = 0x0fff, 1175 .min_yc = 0x0, 1176 .max_yc = 0x0fff, 1177 .rept_size = 8, 1178 .read_data = irtouch_read_data, 1179 }, 1180 #endif 1181 1182 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK 1183 [DEVTYPE_IDEALTEK] = { 1184 .min_xc = 0x0, 1185 .max_xc = 0x0fff, 1186 .min_yc = 0x0, 1187 .max_yc = 0x0fff, 1188 .rept_size = 8, 1189 .process_pkt = usbtouch_process_multi, 1190 .get_pkt_len = idealtek_get_pkt_len, 1191 .read_data = idealtek_read_data, 1192 }, 1193 #endif 1194 1195 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH 1196 [DEVTYPE_GENERAL_TOUCH] = { 1197 .min_xc = 0x0, 1198 .max_xc = 0x7fff, 1199 .min_yc = 0x0, 1200 .max_yc = 0x7fff, 1201 .rept_size = 7, 1202 .read_data = general_touch_read_data, 1203 }, 1204 #endif 1205 1206 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP 1207 [DEVTYPE_GOTOP] = { 1208 .min_xc = 0x0, 1209 .max_xc = 0x03ff, 1210 .min_yc = 0x0, 1211 .max_yc = 0x03ff, 1212 .rept_size = 4, 1213 .read_data = gotop_read_data, 1214 }, 1215 #endif 1216 1217 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC 1218 [DEVTYPE_JASTEC] = { 1219 .min_xc = 0x0, 1220 .max_xc = 0x0fff, 1221 .min_yc = 0x0, 1222 .max_yc = 0x0fff, 1223 .rept_size = 4, 1224 .read_data = jastec_read_data, 1225 }, 1226 #endif 1227 1228 #ifdef CONFIG_TOUCHSCREEN_USB_E2I 1229 [DEVTYPE_E2I] = { 1230 .min_xc = 0x0, 1231 .max_xc = 0x7fff, 1232 .min_yc = 0x0, 1233 .max_yc = 0x7fff, 1234 .rept_size = 6, 1235 .init = e2i_init, 1236 .read_data = e2i_read_data, 1237 }, 1238 #endif 1239 1240 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC 1241 [DEVTYPE_ZYTRONIC] = { 1242 .min_xc = 0x0, 1243 .max_xc = 0x03ff, 1244 .min_yc = 0x0, 1245 .max_yc = 0x03ff, 1246 .rept_size = 5, 1247 .read_data = zytronic_read_data, 1248 .irq_always = true, 1249 }, 1250 #endif 1251 1252 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB 1253 [DEVTYPE_TC45USB] = { 1254 .min_xc = 0x0, 1255 .max_xc = 0x0fff, 1256 .min_yc = 0x0, 1257 .max_yc = 0x0fff, 1258 .rept_size = 5, 1259 .read_data = tc45usb_read_data, 1260 }, 1261 #endif 1262 1263 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO 1264 [DEVTYPE_NEXIO] = { 1265 .rept_size = 1024, 1266 .irq_always = true, 1267 .read_data = nexio_read_data, 1268 .alloc = nexio_alloc, 1269 .init = nexio_init, 1270 .exit = nexio_exit, 1271 }, 1272 #endif 1273 #ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH 1274 [DEVTYPE_ETOUCH] = { 1275 .min_xc = 0x0, 1276 .max_xc = 0x07ff, 1277 .min_yc = 0x0, 1278 .max_yc = 0x07ff, 1279 .rept_size = 16, 1280 .process_pkt = usbtouch_process_multi, 1281 .get_pkt_len = etouch_get_pkt_len, 1282 .read_data = etouch_read_data, 1283 }, 1284 #endif 1285 }; 1286 1287 1288 /***************************************************************************** 1289 * Generic Part 1290 */ 1291 static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch, 1292 unsigned char *pkt, int len) 1293 { 1294 struct usbtouch_device_info *type = usbtouch->type; 1295 1296 if (!type->read_data(usbtouch, pkt)) 1297 return; 1298 1299 input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch); 1300 1301 if (swap_xy) { 1302 input_report_abs(usbtouch->input, ABS_X, usbtouch->y); 1303 input_report_abs(usbtouch->input, ABS_Y, usbtouch->x); 1304 } else { 1305 input_report_abs(usbtouch->input, ABS_X, usbtouch->x); 1306 input_report_abs(usbtouch->input, ABS_Y, usbtouch->y); 1307 } 1308 if (type->max_press) 1309 input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press); 1310 input_sync(usbtouch->input); 1311 } 1312 1313 1314 #ifdef MULTI_PACKET 1315 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch, 1316 unsigned char *pkt, int len) 1317 { 1318 unsigned char *buffer; 1319 int pkt_len, pos, buf_len, tmp; 1320 1321 /* process buffer */ 1322 if (unlikely(usbtouch->buf_len)) { 1323 /* try to get size */ 1324 pkt_len = usbtouch->type->get_pkt_len( 1325 usbtouch->buffer, usbtouch->buf_len); 1326 1327 /* drop? */ 1328 if (unlikely(!pkt_len)) 1329 goto out_flush_buf; 1330 1331 /* need to append -pkt_len bytes before able to get size */ 1332 if (unlikely(pkt_len < 0)) { 1333 int append = -pkt_len; 1334 if (unlikely(append > len)) 1335 append = len; 1336 if (usbtouch->buf_len + append >= usbtouch->type->rept_size) 1337 goto out_flush_buf; 1338 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append); 1339 usbtouch->buf_len += append; 1340 1341 pkt_len = usbtouch->type->get_pkt_len( 1342 usbtouch->buffer, usbtouch->buf_len); 1343 if (pkt_len < 0) 1344 return; 1345 } 1346 1347 /* append */ 1348 tmp = pkt_len - usbtouch->buf_len; 1349 if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size) 1350 goto out_flush_buf; 1351 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp); 1352 usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len); 1353 1354 buffer = pkt + tmp; 1355 buf_len = len - tmp; 1356 } else { 1357 buffer = pkt; 1358 buf_len = len; 1359 } 1360 1361 /* loop over the received packet, process */ 1362 pos = 0; 1363 while (pos < buf_len) { 1364 /* get packet len */ 1365 pkt_len = usbtouch->type->get_pkt_len(buffer + pos, 1366 buf_len - pos); 1367 1368 /* unknown packet: skip one byte */ 1369 if (unlikely(!pkt_len)) { 1370 pos++; 1371 continue; 1372 } 1373 1374 /* full packet: process */ 1375 if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) { 1376 usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len); 1377 } else { 1378 /* incomplete packet: save in buffer */ 1379 memcpy(usbtouch->buffer, buffer + pos, buf_len - pos); 1380 usbtouch->buf_len = buf_len - pos; 1381 return; 1382 } 1383 pos += pkt_len; 1384 } 1385 1386 out_flush_buf: 1387 usbtouch->buf_len = 0; 1388 return; 1389 } 1390 #endif 1391 1392 1393 static void usbtouch_irq(struct urb *urb) 1394 { 1395 struct usbtouch_usb *usbtouch = urb->context; 1396 struct device *dev = &usbtouch->interface->dev; 1397 int retval; 1398 1399 switch (urb->status) { 1400 case 0: 1401 /* success */ 1402 break; 1403 case -ETIME: 1404 /* this urb is timing out */ 1405 dev_dbg(dev, 1406 "%s - urb timed out - was the device unplugged?\n", 1407 __func__); 1408 return; 1409 case -ECONNRESET: 1410 case -ENOENT: 1411 case -ESHUTDOWN: 1412 case -EPIPE: 1413 /* this urb is terminated, clean up */ 1414 dev_dbg(dev, "%s - urb shutting down with status: %d\n", 1415 __func__, urb->status); 1416 return; 1417 default: 1418 dev_dbg(dev, "%s - nonzero urb status received: %d\n", 1419 __func__, urb->status); 1420 goto exit; 1421 } 1422 1423 usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length); 1424 1425 exit: 1426 usb_mark_last_busy(interface_to_usbdev(usbtouch->interface)); 1427 retval = usb_submit_urb(urb, GFP_ATOMIC); 1428 if (retval) 1429 dev_err(dev, "%s - usb_submit_urb failed with result: %d\n", 1430 __func__, retval); 1431 } 1432 1433 static int usbtouch_open(struct input_dev *input) 1434 { 1435 struct usbtouch_usb *usbtouch = input_get_drvdata(input); 1436 int r; 1437 1438 usbtouch->irq->dev = interface_to_usbdev(usbtouch->interface); 1439 1440 r = usb_autopm_get_interface(usbtouch->interface) ? -EIO : 0; 1441 if (r < 0) 1442 goto out; 1443 1444 if (!usbtouch->type->irq_always) { 1445 if (usb_submit_urb(usbtouch->irq, GFP_KERNEL)) { 1446 r = -EIO; 1447 goto out_put; 1448 } 1449 } 1450 1451 usbtouch->interface->needs_remote_wakeup = 1; 1452 out_put: 1453 usb_autopm_put_interface(usbtouch->interface); 1454 out: 1455 return r; 1456 } 1457 1458 static void usbtouch_close(struct input_dev *input) 1459 { 1460 struct usbtouch_usb *usbtouch = input_get_drvdata(input); 1461 int r; 1462 1463 if (!usbtouch->type->irq_always) 1464 usb_kill_urb(usbtouch->irq); 1465 r = usb_autopm_get_interface(usbtouch->interface); 1466 usbtouch->interface->needs_remote_wakeup = 0; 1467 if (!r) 1468 usb_autopm_put_interface(usbtouch->interface); 1469 } 1470 1471 static int usbtouch_suspend 1472 (struct usb_interface *intf, pm_message_t message) 1473 { 1474 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf); 1475 1476 usb_kill_urb(usbtouch->irq); 1477 1478 return 0; 1479 } 1480 1481 static int usbtouch_resume(struct usb_interface *intf) 1482 { 1483 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf); 1484 struct input_dev *input = usbtouch->input; 1485 int result = 0; 1486 1487 mutex_lock(&input->mutex); 1488 if (input->users || usbtouch->type->irq_always) 1489 result = usb_submit_urb(usbtouch->irq, GFP_NOIO); 1490 mutex_unlock(&input->mutex); 1491 1492 return result; 1493 } 1494 1495 static int usbtouch_reset_resume(struct usb_interface *intf) 1496 { 1497 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf); 1498 struct input_dev *input = usbtouch->input; 1499 int err = 0; 1500 1501 /* reinit the device */ 1502 if (usbtouch->type->init) { 1503 err = usbtouch->type->init(usbtouch); 1504 if (err) { 1505 dev_dbg(&intf->dev, 1506 "%s - type->init() failed, err: %d\n", 1507 __func__, err); 1508 return err; 1509 } 1510 } 1511 1512 /* restart IO if needed */ 1513 mutex_lock(&input->mutex); 1514 if (input->users) 1515 err = usb_submit_urb(usbtouch->irq, GFP_NOIO); 1516 mutex_unlock(&input->mutex); 1517 1518 return err; 1519 } 1520 1521 static void usbtouch_free_buffers(struct usb_device *udev, 1522 struct usbtouch_usb *usbtouch) 1523 { 1524 usb_free_coherent(udev, usbtouch->data_size, 1525 usbtouch->data, usbtouch->data_dma); 1526 kfree(usbtouch->buffer); 1527 } 1528 1529 static struct usb_endpoint_descriptor * 1530 usbtouch_get_input_endpoint(struct usb_host_interface *interface) 1531 { 1532 int i; 1533 1534 for (i = 0; i < interface->desc.bNumEndpoints; i++) 1535 if (usb_endpoint_dir_in(&interface->endpoint[i].desc)) 1536 return &interface->endpoint[i].desc; 1537 1538 return NULL; 1539 } 1540 1541 static int usbtouch_probe(struct usb_interface *intf, 1542 const struct usb_device_id *id) 1543 { 1544 struct usbtouch_usb *usbtouch; 1545 struct input_dev *input_dev; 1546 struct usb_endpoint_descriptor *endpoint; 1547 struct usb_device *udev = interface_to_usbdev(intf); 1548 struct usbtouch_device_info *type; 1549 int err = -ENOMEM; 1550 1551 /* some devices are ignored */ 1552 if (id->driver_info == DEVTYPE_IGNORE) 1553 return -ENODEV; 1554 1555 endpoint = usbtouch_get_input_endpoint(intf->cur_altsetting); 1556 if (!endpoint) 1557 return -ENXIO; 1558 1559 usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL); 1560 input_dev = input_allocate_device(); 1561 if (!usbtouch || !input_dev) 1562 goto out_free; 1563 1564 type = &usbtouch_dev_info[id->driver_info]; 1565 usbtouch->type = type; 1566 if (!type->process_pkt) 1567 type->process_pkt = usbtouch_process_pkt; 1568 1569 usbtouch->data_size = type->rept_size; 1570 if (type->get_pkt_len) { 1571 /* 1572 * When dealing with variable-length packets we should 1573 * not request more than wMaxPacketSize bytes at once 1574 * as we do not know if there is more data coming or 1575 * we filled exactly wMaxPacketSize bytes and there is 1576 * nothing else. 1577 */ 1578 usbtouch->data_size = min(usbtouch->data_size, 1579 usb_endpoint_maxp(endpoint)); 1580 } 1581 1582 usbtouch->data = usb_alloc_coherent(udev, usbtouch->data_size, 1583 GFP_KERNEL, &usbtouch->data_dma); 1584 if (!usbtouch->data) 1585 goto out_free; 1586 1587 if (type->get_pkt_len) { 1588 usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL); 1589 if (!usbtouch->buffer) 1590 goto out_free_buffers; 1591 } 1592 1593 usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL); 1594 if (!usbtouch->irq) { 1595 dev_dbg(&intf->dev, 1596 "%s - usb_alloc_urb failed: usbtouch->irq\n", __func__); 1597 goto out_free_buffers; 1598 } 1599 1600 usbtouch->interface = intf; 1601 usbtouch->input = input_dev; 1602 1603 if (udev->manufacturer) 1604 strlcpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name)); 1605 1606 if (udev->product) { 1607 if (udev->manufacturer) 1608 strlcat(usbtouch->name, " ", sizeof(usbtouch->name)); 1609 strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name)); 1610 } 1611 1612 if (!strlen(usbtouch->name)) 1613 snprintf(usbtouch->name, sizeof(usbtouch->name), 1614 "USB Touchscreen %04x:%04x", 1615 le16_to_cpu(udev->descriptor.idVendor), 1616 le16_to_cpu(udev->descriptor.idProduct)); 1617 1618 usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys)); 1619 strlcat(usbtouch->phys, "/input0", sizeof(usbtouch->phys)); 1620 1621 input_dev->name = usbtouch->name; 1622 input_dev->phys = usbtouch->phys; 1623 usb_to_input_id(udev, &input_dev->id); 1624 input_dev->dev.parent = &intf->dev; 1625 1626 input_set_drvdata(input_dev, usbtouch); 1627 1628 input_dev->open = usbtouch_open; 1629 input_dev->close = usbtouch_close; 1630 1631 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); 1632 input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH); 1633 input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0); 1634 input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0); 1635 if (type->max_press) 1636 input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press, 1637 type->max_press, 0, 0); 1638 1639 if (usb_endpoint_type(endpoint) == USB_ENDPOINT_XFER_INT) 1640 usb_fill_int_urb(usbtouch->irq, udev, 1641 usb_rcvintpipe(udev, endpoint->bEndpointAddress), 1642 usbtouch->data, usbtouch->data_size, 1643 usbtouch_irq, usbtouch, endpoint->bInterval); 1644 else 1645 usb_fill_bulk_urb(usbtouch->irq, udev, 1646 usb_rcvbulkpipe(udev, endpoint->bEndpointAddress), 1647 usbtouch->data, usbtouch->data_size, 1648 usbtouch_irq, usbtouch); 1649 1650 usbtouch->irq->dev = udev; 1651 usbtouch->irq->transfer_dma = usbtouch->data_dma; 1652 usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1653 1654 /* device specific allocations */ 1655 if (type->alloc) { 1656 err = type->alloc(usbtouch); 1657 if (err) { 1658 dev_dbg(&intf->dev, 1659 "%s - type->alloc() failed, err: %d\n", 1660 __func__, err); 1661 goto out_free_urb; 1662 } 1663 } 1664 1665 /* device specific initialisation*/ 1666 if (type->init) { 1667 err = type->init(usbtouch); 1668 if (err) { 1669 dev_dbg(&intf->dev, 1670 "%s - type->init() failed, err: %d\n", 1671 __func__, err); 1672 goto out_do_exit; 1673 } 1674 } 1675 1676 err = input_register_device(usbtouch->input); 1677 if (err) { 1678 dev_dbg(&intf->dev, 1679 "%s - input_register_device failed, err: %d\n", 1680 __func__, err); 1681 goto out_do_exit; 1682 } 1683 1684 usb_set_intfdata(intf, usbtouch); 1685 1686 if (usbtouch->type->irq_always) { 1687 /* this can't fail */ 1688 usb_autopm_get_interface(intf); 1689 err = usb_submit_urb(usbtouch->irq, GFP_KERNEL); 1690 if (err) { 1691 usb_autopm_put_interface(intf); 1692 dev_err(&intf->dev, 1693 "%s - usb_submit_urb failed with result: %d\n", 1694 __func__, err); 1695 goto out_unregister_input; 1696 } 1697 } 1698 1699 return 0; 1700 1701 out_unregister_input: 1702 input_unregister_device(input_dev); 1703 input_dev = NULL; 1704 out_do_exit: 1705 if (type->exit) 1706 type->exit(usbtouch); 1707 out_free_urb: 1708 usb_free_urb(usbtouch->irq); 1709 out_free_buffers: 1710 usbtouch_free_buffers(udev, usbtouch); 1711 out_free: 1712 input_free_device(input_dev); 1713 kfree(usbtouch); 1714 return err; 1715 } 1716 1717 static void usbtouch_disconnect(struct usb_interface *intf) 1718 { 1719 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf); 1720 1721 if (!usbtouch) 1722 return; 1723 1724 dev_dbg(&intf->dev, 1725 "%s - usbtouch is initialized, cleaning up\n", __func__); 1726 1727 usb_set_intfdata(intf, NULL); 1728 /* this will stop IO via close */ 1729 input_unregister_device(usbtouch->input); 1730 usb_free_urb(usbtouch->irq); 1731 if (usbtouch->type->exit) 1732 usbtouch->type->exit(usbtouch); 1733 usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch); 1734 kfree(usbtouch); 1735 } 1736 1737 MODULE_DEVICE_TABLE(usb, usbtouch_devices); 1738 1739 static struct usb_driver usbtouch_driver = { 1740 .name = "usbtouchscreen", 1741 .probe = usbtouch_probe, 1742 .disconnect = usbtouch_disconnect, 1743 .suspend = usbtouch_suspend, 1744 .resume = usbtouch_resume, 1745 .reset_resume = usbtouch_reset_resume, 1746 .id_table = usbtouch_devices, 1747 .supports_autosuspend = 1, 1748 }; 1749 1750 module_usb_driver(usbtouch_driver); 1751 1752 MODULE_AUTHOR(DRIVER_AUTHOR); 1753 MODULE_DESCRIPTION(DRIVER_DESC); 1754 MODULE_LICENSE("GPL"); 1755 1756 MODULE_ALIAS("touchkitusb"); 1757 MODULE_ALIAS("itmtouch"); 1758 MODULE_ALIAS("mtouchusb"); 1759