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