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[deliverable/linux.git] / drivers / input / touchscreen / usbtouchscreen.c
1 /******************************************************************************
2 * usbtouchscreen.c
3 * Driver for USB Touchscreens, supporting those devices:
4 * - eGalax Touchkit
5 * includes eTurboTouch CT-410/510/700
6 * - 3M/Microtouch EX II series
7 * - ITM
8 * - PanJit TouchSet
9 * - eTurboTouch
10 * - Gunze AHL61
11 * - DMC TSC-10/25
12 * - IRTOUCHSYSTEMS/UNITOP
13 * - IdealTEK URTC1000
14 * - General Touch
15 * - GoTop Super_Q2/GogoPen/PenPower tablets
16 * - JASTEC USB touch controller/DigiTech DTR-02U
17 * - Zytronic capacitive touchscreen
18 * - NEXIO/iNexio
19 *
20 * Copyright (C) 2004-2007 by Daniel Ritz <daniel.ritz@gmx.ch>
21 * Copyright (C) by Todd E. Johnson (mtouchusb.c)
22 *
23 * This program is free software; you can redistribute it and/or
24 * modify it under the terms of the GNU General Public License as
25 * published by the Free Software Foundation; either version 2 of the
26 * License, or (at your option) any later version.
27 *
28 * This program is distributed in the hope that it will be useful, but
29 * WITHOUT ANY WARRANTY; without even the implied warranty of
30 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
31 * General Public License for more details.
32 *
33 * You should have received a copy of the GNU General Public License
34 * along with this program; if not, write to the Free Software
35 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
36 *
37 * Driver is based on touchkitusb.c
38 * - ITM parts are from itmtouch.c
39 * - 3M parts are from mtouchusb.c
40 * - PanJit parts are from an unmerged driver by Lanslott Gish
41 * - DMC TSC 10/25 are from Holger Schurig, with ideas from an unmerged
42 * driver from Marius Vollmer
43 *
44 *****************************************************************************/
45
46 //#define DEBUG
47
48 #include <linux/kernel.h>
49 #include <linux/slab.h>
50 #include <linux/input.h>
51 #include <linux/module.h>
52 #include <linux/init.h>
53 #include <linux/usb.h>
54 #include <linux/usb/input.h>
55 #include <linux/hid.h>
56
57
58 #define DRIVER_VERSION "v0.6"
59 #define DRIVER_AUTHOR "Daniel Ritz <daniel.ritz@gmx.ch>"
60 #define DRIVER_DESC "USB Touchscreen Driver"
61
62 static int swap_xy;
63 module_param(swap_xy, bool, 0644);
64 MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");
65
66 static int hwcalib_xy;
67 module_param(hwcalib_xy, bool, 0644);
68 MODULE_PARM_DESC(hwcalib_xy, "If set hw-calibrated X/Y are used if available");
69
70 /* device specifc data/functions */
71 struct usbtouch_usb;
72 struct usbtouch_device_info {
73 int min_xc, max_xc;
74 int min_yc, max_yc;
75 int min_press, max_press;
76 int rept_size;
77
78 /*
79 * Always service the USB devices irq not just when the input device is
80 * open. This is useful when devices have a watchdog which prevents us
81 * from periodically polling the device. Leave this unset unless your
82 * touchscreen device requires it, as it does consume more of the USB
83 * bandwidth.
84 */
85 bool irq_always;
86
87 void (*process_pkt) (struct usbtouch_usb *usbtouch, unsigned char *pkt, int len);
88
89 /*
90 * used to get the packet len. possible return values:
91 * > 0: packet len
92 * = 0: skip one byte
93 * < 0: -return value more bytes needed
94 */
95 int (*get_pkt_len) (unsigned char *pkt, int len);
96
97 int (*read_data) (struct usbtouch_usb *usbtouch, unsigned char *pkt);
98 int (*init) (struct usbtouch_usb *usbtouch);
99 void (*exit) (struct usbtouch_usb *usbtouch);
100 };
101
102 /* a usbtouch device */
103 struct usbtouch_usb {
104 unsigned char *data;
105 dma_addr_t data_dma;
106 unsigned char *buffer;
107 int buf_len;
108 struct urb *irq;
109 struct usb_interface *interface;
110 struct input_dev *input;
111 struct usbtouch_device_info *type;
112 char name[128];
113 char phys[64];
114 void *priv;
115
116 int x, y;
117 int touch, press;
118 };
119
120
121 /* device types */
122 enum {
123 DEVTYPE_IGNORE = -1,
124 DEVTYPE_EGALAX,
125 DEVTYPE_PANJIT,
126 DEVTYPE_3M,
127 DEVTYPE_ITM,
128 DEVTYPE_ETURBO,
129 DEVTYPE_GUNZE,
130 DEVTYPE_DMC_TSC10,
131 DEVTYPE_IRTOUCH,
132 DEVTYPE_IDEALTEK,
133 DEVTYPE_GENERAL_TOUCH,
134 DEVTYPE_GOTOP,
135 DEVTYPE_JASTEC,
136 DEVTYPE_E2I,
137 DEVTYPE_ZYTRONIC,
138 DEVTYPE_TC45USB,
139 DEVTYPE_NEXIO,
140 };
141
142 #define USB_DEVICE_HID_CLASS(vend, prod) \
143 .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS \
144 | USB_DEVICE_ID_MATCH_INT_PROTOCOL \
145 | USB_DEVICE_ID_MATCH_DEVICE, \
146 .idVendor = (vend), \
147 .idProduct = (prod), \
148 .bInterfaceClass = USB_INTERFACE_CLASS_HID, \
149 .bInterfaceProtocol = USB_INTERFACE_PROTOCOL_MOUSE
150
151 static const struct usb_device_id usbtouch_devices[] = {
152 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
153 /* ignore the HID capable devices, handled by usbhid */
154 {USB_DEVICE_HID_CLASS(0x0eef, 0x0001), .driver_info = DEVTYPE_IGNORE},
155 {USB_DEVICE_HID_CLASS(0x0eef, 0x0002), .driver_info = DEVTYPE_IGNORE},
156
157 /* normal device IDs */
158 {USB_DEVICE(0x3823, 0x0001), .driver_info = DEVTYPE_EGALAX},
159 {USB_DEVICE(0x3823, 0x0002), .driver_info = DEVTYPE_EGALAX},
160 {USB_DEVICE(0x0123, 0x0001), .driver_info = DEVTYPE_EGALAX},
161 {USB_DEVICE(0x0eef, 0x0001), .driver_info = DEVTYPE_EGALAX},
162 {USB_DEVICE(0x0eef, 0x0002), .driver_info = DEVTYPE_EGALAX},
163 {USB_DEVICE(0x1234, 0x0001), .driver_info = DEVTYPE_EGALAX},
164 {USB_DEVICE(0x1234, 0x0002), .driver_info = DEVTYPE_EGALAX},
165 #endif
166
167 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
168 {USB_DEVICE(0x134c, 0x0001), .driver_info = DEVTYPE_PANJIT},
169 {USB_DEVICE(0x134c, 0x0002), .driver_info = DEVTYPE_PANJIT},
170 {USB_DEVICE(0x134c, 0x0003), .driver_info = DEVTYPE_PANJIT},
171 {USB_DEVICE(0x134c, 0x0004), .driver_info = DEVTYPE_PANJIT},
172 #endif
173
174 #ifdef CONFIG_TOUCHSCREEN_USB_3M
175 {USB_DEVICE(0x0596, 0x0001), .driver_info = DEVTYPE_3M},
176 #endif
177
178 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
179 {USB_DEVICE(0x0403, 0xf9e9), .driver_info = DEVTYPE_ITM},
180 #endif
181
182 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
183 {USB_DEVICE(0x1234, 0x5678), .driver_info = DEVTYPE_ETURBO},
184 #endif
185
186 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
187 {USB_DEVICE(0x0637, 0x0001), .driver_info = DEVTYPE_GUNZE},
188 #endif
189
190 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
191 {USB_DEVICE(0x0afa, 0x03e8), .driver_info = DEVTYPE_DMC_TSC10},
192 #endif
193
194 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
195 {USB_DEVICE(0x595a, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
196 {USB_DEVICE(0x6615, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
197 #endif
198
199 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
200 {USB_DEVICE(0x1391, 0x1000), .driver_info = DEVTYPE_IDEALTEK},
201 #endif
202
203 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
204 {USB_DEVICE(0x0dfc, 0x0001), .driver_info = DEVTYPE_GENERAL_TOUCH},
205 #endif
206
207 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
208 {USB_DEVICE(0x08f2, 0x007f), .driver_info = DEVTYPE_GOTOP},
209 {USB_DEVICE(0x08f2, 0x00ce), .driver_info = DEVTYPE_GOTOP},
210 {USB_DEVICE(0x08f2, 0x00f4), .driver_info = DEVTYPE_GOTOP},
211 #endif
212
213 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
214 {USB_DEVICE(0x0f92, 0x0001), .driver_info = DEVTYPE_JASTEC},
215 #endif
216
217 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
218 {USB_DEVICE(0x1ac7, 0x0001), .driver_info = DEVTYPE_E2I},
219 #endif
220
221 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
222 {USB_DEVICE(0x14c8, 0x0003), .driver_info = DEVTYPE_ZYTRONIC},
223 #endif
224
225 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
226 /* TC5UH */
227 {USB_DEVICE(0x0664, 0x0309), .driver_info = DEVTYPE_TC45USB},
228 /* TC4UM */
229 {USB_DEVICE(0x0664, 0x0306), .driver_info = DEVTYPE_TC45USB},
230 #endif
231
232 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
233 /* data interface only */
234 {USB_DEVICE_AND_INTERFACE_INFO(0x10f0, 0x2002, 0x0a, 0x00, 0x00),
235 .driver_info = DEVTYPE_NEXIO},
236 {USB_DEVICE_AND_INTERFACE_INFO(0x1870, 0x0001, 0x0a, 0x00, 0x00),
237 .driver_info = DEVTYPE_NEXIO},
238 #endif
239
240 {}
241 };
242
243
244 /*****************************************************************************
245 * e2i Part
246 */
247
248 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
249 static int e2i_init(struct usbtouch_usb *usbtouch)
250 {
251 int ret;
252 struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
253
254 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
255 0x01, 0x02, 0x0000, 0x0081,
256 NULL, 0, USB_CTRL_SET_TIMEOUT);
257
258 dbg("%s - usb_control_msg - E2I_RESET - bytes|err: %d",
259 __func__, ret);
260 return ret;
261 }
262
263 static int e2i_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
264 {
265 int tmp = (pkt[0] << 8) | pkt[1];
266 dev->x = (pkt[2] << 8) | pkt[3];
267 dev->y = (pkt[4] << 8) | pkt[5];
268
269 tmp = tmp - 0xA000;
270 dev->touch = (tmp > 0);
271 dev->press = (tmp > 0 ? tmp : 0);
272
273 return 1;
274 }
275 #endif
276
277
278 /*****************************************************************************
279 * eGalax part
280 */
281
282 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
283
284 #ifndef MULTI_PACKET
285 #define MULTI_PACKET
286 #endif
287
288 #define EGALAX_PKT_TYPE_MASK 0xFE
289 #define EGALAX_PKT_TYPE_REPT 0x80
290 #define EGALAX_PKT_TYPE_DIAG 0x0A
291
292 static int egalax_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
293 {
294 if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT)
295 return 0;
296
297 dev->x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F);
298 dev->y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F);
299 dev->touch = pkt[0] & 0x01;
300
301 return 1;
302 }
303
304 static int egalax_get_pkt_len(unsigned char *buf, int len)
305 {
306 switch (buf[0] & EGALAX_PKT_TYPE_MASK) {
307 case EGALAX_PKT_TYPE_REPT:
308 return 5;
309
310 case EGALAX_PKT_TYPE_DIAG:
311 if (len < 2)
312 return -1;
313
314 return buf[1] + 2;
315 }
316
317 return 0;
318 }
319 #endif
320
321
322 /*****************************************************************************
323 * PanJit Part
324 */
325 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
326 static int panjit_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
327 {
328 dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
329 dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
330 dev->touch = pkt[0] & 0x01;
331
332 return 1;
333 }
334 #endif
335
336
337 /*****************************************************************************
338 * 3M/Microtouch Part
339 */
340 #ifdef CONFIG_TOUCHSCREEN_USB_3M
341
342 #define MTOUCHUSB_ASYNC_REPORT 1
343 #define MTOUCHUSB_RESET 7
344 #define MTOUCHUSB_REQ_CTRLLR_ID 10
345
346 static int mtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
347 {
348 if (hwcalib_xy) {
349 dev->x = (pkt[4] << 8) | pkt[3];
350 dev->y = 0xffff - ((pkt[6] << 8) | pkt[5]);
351 } else {
352 dev->x = (pkt[8] << 8) | pkt[7];
353 dev->y = (pkt[10] << 8) | pkt[9];
354 }
355 dev->touch = (pkt[2] & 0x40) ? 1 : 0;
356
357 return 1;
358 }
359
360 static int mtouch_init(struct usbtouch_usb *usbtouch)
361 {
362 int ret, i;
363 struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
364
365 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
366 MTOUCHUSB_RESET,
367 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
368 1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
369 dbg("%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d",
370 __func__, ret);
371 if (ret < 0)
372 return ret;
373 msleep(150);
374
375 for (i = 0; i < 3; i++) {
376 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
377 MTOUCHUSB_ASYNC_REPORT,
378 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
379 1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT);
380 dbg("%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d",
381 __func__, ret);
382 if (ret >= 0)
383 break;
384 if (ret != -EPIPE)
385 return ret;
386 }
387
388 /* Default min/max xy are the raw values, override if using hw-calib */
389 if (hwcalib_xy) {
390 input_set_abs_params(usbtouch->input, ABS_X, 0, 0xffff, 0, 0);
391 input_set_abs_params(usbtouch->input, ABS_Y, 0, 0xffff, 0, 0);
392 }
393
394 return 0;
395 }
396 #endif
397
398
399 /*****************************************************************************
400 * ITM Part
401 */
402 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
403 static int itm_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
404 {
405 int touch;
406 /*
407 * ITM devices report invalid x/y data if not touched.
408 * if the screen was touched before but is not touched any more
409 * report touch as 0 with the last valid x/y data once. then stop
410 * reporting data until touched again.
411 */
412 dev->press = ((pkt[2] & 0x01) << 7) | (pkt[5] & 0x7F);
413
414 touch = ~pkt[7] & 0x20;
415 if (!touch) {
416 if (dev->touch) {
417 dev->touch = 0;
418 return 1;
419 }
420
421 return 0;
422 }
423
424 dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F);
425 dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F);
426 dev->touch = touch;
427
428 return 1;
429 }
430 #endif
431
432
433 /*****************************************************************************
434 * eTurboTouch part
435 */
436 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
437 #ifndef MULTI_PACKET
438 #define MULTI_PACKET
439 #endif
440 static int eturbo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
441 {
442 unsigned int shift;
443
444 /* packets should start with sync */
445 if (!(pkt[0] & 0x80))
446 return 0;
447
448 shift = (6 - (pkt[0] & 0x03));
449 dev->x = ((pkt[3] << 7) | pkt[4]) >> shift;
450 dev->y = ((pkt[1] << 7) | pkt[2]) >> shift;
451 dev->touch = (pkt[0] & 0x10) ? 1 : 0;
452
453 return 1;
454 }
455
456 static int eturbo_get_pkt_len(unsigned char *buf, int len)
457 {
458 if (buf[0] & 0x80)
459 return 5;
460 if (buf[0] == 0x01)
461 return 3;
462 return 0;
463 }
464 #endif
465
466
467 /*****************************************************************************
468 * Gunze part
469 */
470 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
471 static int gunze_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
472 {
473 if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80))
474 return 0;
475
476 dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F);
477 dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F);
478 dev->touch = pkt[0] & 0x20;
479
480 return 1;
481 }
482 #endif
483
484 /*****************************************************************************
485 * DMC TSC-10/25 Part
486 *
487 * Documentation about the controller and it's protocol can be found at
488 * http://www.dmccoltd.com/files/controler/tsc10usb_pi_e.pdf
489 * http://www.dmccoltd.com/files/controler/tsc25_usb_e.pdf
490 */
491 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
492
493 /* supported data rates. currently using 130 */
494 #define TSC10_RATE_POINT 0x50
495 #define TSC10_RATE_30 0x40
496 #define TSC10_RATE_50 0x41
497 #define TSC10_RATE_80 0x42
498 #define TSC10_RATE_100 0x43
499 #define TSC10_RATE_130 0x44
500 #define TSC10_RATE_150 0x45
501
502 /* commands */
503 #define TSC10_CMD_RESET 0x55
504 #define TSC10_CMD_RATE 0x05
505 #define TSC10_CMD_DATA1 0x01
506
507 static int dmc_tsc10_init(struct usbtouch_usb *usbtouch)
508 {
509 struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
510 int ret = -ENOMEM;
511 unsigned char *buf;
512
513 buf = kmalloc(2, GFP_KERNEL);
514 if (!buf)
515 goto err_nobuf;
516 /* reset */
517 buf[0] = buf[1] = 0xFF;
518 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
519 TSC10_CMD_RESET,
520 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
521 0, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
522 if (ret < 0)
523 goto err_out;
524 if (buf[0] != 0x06) {
525 ret = -ENODEV;
526 goto err_out;
527 }
528
529 /* set coordinate output rate */
530 buf[0] = buf[1] = 0xFF;
531 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
532 TSC10_CMD_RATE,
533 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
534 TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
535 if (ret < 0)
536 goto err_out;
537 if ((buf[0] != 0x06) && (buf[0] != 0x15 || buf[1] != 0x01)) {
538 ret = -ENODEV;
539 goto err_out;
540 }
541
542 /* start sending data */
543 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
544 TSC10_CMD_DATA1,
545 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
546 0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
547 err_out:
548 kfree(buf);
549 err_nobuf:
550 return ret;
551 }
552
553
554 static int dmc_tsc10_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
555 {
556 dev->x = ((pkt[2] & 0x03) << 8) | pkt[1];
557 dev->y = ((pkt[4] & 0x03) << 8) | pkt[3];
558 dev->touch = pkt[0] & 0x01;
559
560 return 1;
561 }
562 #endif
563
564
565 /*****************************************************************************
566 * IRTOUCH Part
567 */
568 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
569 static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
570 {
571 dev->x = (pkt[3] << 8) | pkt[2];
572 dev->y = (pkt[5] << 8) | pkt[4];
573 dev->touch = (pkt[1] & 0x03) ? 1 : 0;
574
575 return 1;
576 }
577 #endif
578
579 /*****************************************************************************
580 * ET&T TC5UH/TC4UM part
581 */
582 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
583 static int tc45usb_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
584 {
585 dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
586 dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
587 dev->touch = pkt[0] & 0x01;
588
589 return 1;
590 }
591 #endif
592
593 /*****************************************************************************
594 * IdealTEK URTC1000 Part
595 */
596 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
597 #ifndef MULTI_PACKET
598 #define MULTI_PACKET
599 #endif
600 static int idealtek_get_pkt_len(unsigned char *buf, int len)
601 {
602 if (buf[0] & 0x80)
603 return 5;
604 if (buf[0] == 0x01)
605 return len;
606 return 0;
607 }
608
609 static int idealtek_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
610 {
611 switch (pkt[0] & 0x98) {
612 case 0x88:
613 /* touch data in IdealTEK mode */
614 dev->x = (pkt[1] << 5) | (pkt[2] >> 2);
615 dev->y = (pkt[3] << 5) | (pkt[4] >> 2);
616 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
617 return 1;
618
619 case 0x98:
620 /* touch data in MT emulation mode */
621 dev->x = (pkt[2] << 5) | (pkt[1] >> 2);
622 dev->y = (pkt[4] << 5) | (pkt[3] >> 2);
623 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
624 return 1;
625
626 default:
627 return 0;
628 }
629 }
630 #endif
631
632 /*****************************************************************************
633 * General Touch Part
634 */
635 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
636 static int general_touch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
637 {
638 dev->x = (pkt[2] << 8) | pkt[1];
639 dev->y = (pkt[4] << 8) | pkt[3];
640 dev->press = pkt[5] & 0xff;
641 dev->touch = pkt[0] & 0x01;
642
643 return 1;
644 }
645 #endif
646
647 /*****************************************************************************
648 * GoTop Part
649 */
650 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
651 static int gotop_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
652 {
653 dev->x = ((pkt[1] & 0x38) << 4) | pkt[2];
654 dev->y = ((pkt[1] & 0x07) << 7) | pkt[3];
655 dev->touch = pkt[0] & 0x01;
656
657 return 1;
658 }
659 #endif
660
661 /*****************************************************************************
662 * JASTEC Part
663 */
664 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
665 static int jastec_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
666 {
667 dev->x = ((pkt[0] & 0x3f) << 6) | (pkt[2] & 0x3f);
668 dev->y = ((pkt[1] & 0x3f) << 6) | (pkt[3] & 0x3f);
669 dev->touch = (pkt[0] & 0x40) >> 6;
670
671 return 1;
672 }
673 #endif
674
675 /*****************************************************************************
676 * Zytronic Part
677 */
678 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
679 static int zytronic_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
680 {
681 switch (pkt[0]) {
682 case 0x3A: /* command response */
683 dbg("%s: Command response %d", __func__, pkt[1]);
684 break;
685
686 case 0xC0: /* down */
687 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
688 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
689 dev->touch = 1;
690 dbg("%s: down %d,%d", __func__, dev->x, dev->y);
691 return 1;
692
693 case 0x80: /* up */
694 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
695 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
696 dev->touch = 0;
697 dbg("%s: up %d,%d", __func__, dev->x, dev->y);
698 return 1;
699
700 default:
701 dbg("%s: Unknown return %d", __func__, pkt[0]);
702 break;
703 }
704
705 return 0;
706 }
707 #endif
708
709 /*****************************************************************************
710 * NEXIO Part
711 */
712 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
713
714 #define NEXIO_TIMEOUT 5000
715 #define NEXIO_BUFSIZE 1024
716 #define NEXIO_THRESHOLD 50
717
718 struct nexio_priv {
719 struct urb *ack;
720 unsigned char *ack_buf;
721 };
722
723 struct nexio_touch_packet {
724 u8 flags; /* 0xe1 = touch, 0xe1 = release */
725 __be16 data_len; /* total bytes of touch data */
726 __be16 x_len; /* bytes for X axis */
727 __be16 y_len; /* bytes for Y axis */
728 u8 data[];
729 } __attribute__ ((packed));
730
731 static unsigned char nexio_ack_pkt[2] = { 0xaa, 0x02 };
732 static unsigned char nexio_init_pkt[4] = { 0x82, 0x04, 0x0a, 0x0f };
733
734 static void nexio_ack_complete(struct urb *urb)
735 {
736 }
737
738 static int nexio_init(struct usbtouch_usb *usbtouch)
739 {
740 struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
741 struct usb_host_interface *interface = usbtouch->interface->cur_altsetting;
742 struct nexio_priv *priv;
743 int ret = -ENOMEM;
744 int actual_len, i;
745 unsigned char *buf;
746 char *firmware_ver = NULL, *device_name = NULL;
747 int input_ep = 0, output_ep = 0;
748
749 /* find first input and output endpoint */
750 for (i = 0; i < interface->desc.bNumEndpoints; i++) {
751 if (!input_ep &&
752 usb_endpoint_dir_in(&interface->endpoint[i].desc))
753 input_ep = interface->endpoint[i].desc.bEndpointAddress;
754 if (!output_ep &&
755 usb_endpoint_dir_out(&interface->endpoint[i].desc))
756 output_ep = interface->endpoint[i].desc.bEndpointAddress;
757 }
758 if (!input_ep || !output_ep)
759 return -ENXIO;
760
761 buf = kmalloc(NEXIO_BUFSIZE, GFP_KERNEL);
762 if (!buf)
763 goto out_buf;
764
765 /* two empty reads */
766 for (i = 0; i < 2; i++) {
767 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
768 buf, NEXIO_BUFSIZE, &actual_len,
769 NEXIO_TIMEOUT);
770 if (ret < 0)
771 goto out_buf;
772 }
773
774 /* send init command */
775 memcpy(buf, nexio_init_pkt, sizeof(nexio_init_pkt));
776 ret = usb_bulk_msg(dev, usb_sndbulkpipe(dev, output_ep),
777 buf, sizeof(nexio_init_pkt), &actual_len,
778 NEXIO_TIMEOUT);
779 if (ret < 0)
780 goto out_buf;
781
782 /* read replies */
783 for (i = 0; i < 3; i++) {
784 memset(buf, 0, NEXIO_BUFSIZE);
785 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
786 buf, NEXIO_BUFSIZE, &actual_len,
787 NEXIO_TIMEOUT);
788 if (ret < 0 || actual_len < 1 || buf[1] != actual_len)
789 continue;
790 switch (buf[0]) {
791 case 0x83: /* firmware version */
792 if (!firmware_ver)
793 firmware_ver = kstrdup(&buf[2], GFP_KERNEL);
794 break;
795 case 0x84: /* device name */
796 if (!device_name)
797 device_name = kstrdup(&buf[2], GFP_KERNEL);
798 break;
799 }
800 }
801
802 printk(KERN_INFO "Nexio device: %s, firmware version: %s\n",
803 device_name, firmware_ver);
804
805 kfree(firmware_ver);
806 kfree(device_name);
807
808 /* prepare ACK URB */
809 ret = -ENOMEM;
810
811 usbtouch->priv = kmalloc(sizeof(struct nexio_priv), GFP_KERNEL);
812 if (!usbtouch->priv)
813 goto out_buf;
814
815 priv = usbtouch->priv;
816
817 priv->ack_buf = kmemdup(nexio_ack_pkt, sizeof(nexio_ack_pkt),
818 GFP_KERNEL);
819 if (!priv->ack_buf)
820 goto err_priv;
821
822 priv->ack = usb_alloc_urb(0, GFP_KERNEL);
823 if (!priv->ack) {
824 dbg("%s - usb_alloc_urb failed: usbtouch->ack", __func__);
825 goto err_ack_buf;
826 }
827
828 usb_fill_bulk_urb(priv->ack, dev, usb_sndbulkpipe(dev, output_ep),
829 priv->ack_buf, sizeof(nexio_ack_pkt),
830 nexio_ack_complete, usbtouch);
831 ret = 0;
832 goto out_buf;
833
834 err_ack_buf:
835 kfree(priv->ack_buf);
836 err_priv:
837 kfree(priv);
838 out_buf:
839 kfree(buf);
840 return ret;
841 }
842
843 static void nexio_exit(struct usbtouch_usb *usbtouch)
844 {
845 struct nexio_priv *priv = usbtouch->priv;
846
847 usb_kill_urb(priv->ack);
848 usb_free_urb(priv->ack);
849 kfree(priv->ack_buf);
850 kfree(priv);
851 }
852
853 static int nexio_read_data(struct usbtouch_usb *usbtouch, unsigned char *pkt)
854 {
855 struct nexio_touch_packet *packet = (void *) pkt;
856 struct nexio_priv *priv = usbtouch->priv;
857 unsigned int data_len = be16_to_cpu(packet->data_len);
858 unsigned int x_len = be16_to_cpu(packet->x_len);
859 unsigned int y_len = be16_to_cpu(packet->y_len);
860 int x, y, begin_x, begin_y, end_x, end_y, w, h, ret;
861
862 /* got touch data? */
863 if ((pkt[0] & 0xe0) != 0xe0)
864 return 0;
865
866 if (data_len > 0xff)
867 data_len -= 0x100;
868 if (x_len > 0xff)
869 x_len -= 0x80;
870
871 /* send ACK */
872 ret = usb_submit_urb(priv->ack, GFP_ATOMIC);
873
874 if (!usbtouch->type->max_xc) {
875 usbtouch->type->max_xc = 2 * x_len;
876 input_set_abs_params(usbtouch->input, ABS_X,
877 0, usbtouch->type->max_xc, 0, 0);
878 usbtouch->type->max_yc = 2 * y_len;
879 input_set_abs_params(usbtouch->input, ABS_Y,
880 0, usbtouch->type->max_yc, 0, 0);
881 }
882 /*
883 * The device reports state of IR sensors on X and Y axes.
884 * Each byte represents "darkness" percentage (0-100) of one element.
885 * 17" touchscreen reports only 64 x 52 bytes so the resolution is low.
886 * This also means that there's a limited multi-touch capability but
887 * it's disabled (and untested) here as there's no X driver for that.
888 */
889 begin_x = end_x = begin_y = end_y = -1;
890 for (x = 0; x < x_len; x++) {
891 if (begin_x == -1 && packet->data[x] > NEXIO_THRESHOLD) {
892 begin_x = x;
893 continue;
894 }
895 if (end_x == -1 && begin_x != -1 && packet->data[x] < NEXIO_THRESHOLD) {
896 end_x = x - 1;
897 for (y = x_len; y < data_len; y++) {
898 if (begin_y == -1 && packet->data[y] > NEXIO_THRESHOLD) {
899 begin_y = y - x_len;
900 continue;
901 }
902 if (end_y == -1 &&
903 begin_y != -1 && packet->data[y] < NEXIO_THRESHOLD) {
904 end_y = y - 1 - x_len;
905 w = end_x - begin_x;
906 h = end_y - begin_y;
907 #if 0
908 /* multi-touch */
909 input_report_abs(usbtouch->input,
910 ABS_MT_TOUCH_MAJOR, max(w,h));
911 input_report_abs(usbtouch->input,
912 ABS_MT_TOUCH_MINOR, min(x,h));
913 input_report_abs(usbtouch->input,
914 ABS_MT_POSITION_X, 2*begin_x+w);
915 input_report_abs(usbtouch->input,
916 ABS_MT_POSITION_Y, 2*begin_y+h);
917 input_report_abs(usbtouch->input,
918 ABS_MT_ORIENTATION, w > h);
919 input_mt_sync(usbtouch->input);
920 #endif
921 /* single touch */
922 usbtouch->x = 2 * begin_x + w;
923 usbtouch->y = 2 * begin_y + h;
924 usbtouch->touch = packet->flags & 0x01;
925 begin_y = end_y = -1;
926 return 1;
927 }
928 }
929 begin_x = end_x = -1;
930 }
931
932 }
933 return 0;
934 }
935 #endif
936
937
938 /*****************************************************************************
939 * the different device descriptors
940 */
941 #ifdef MULTI_PACKET
942 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
943 unsigned char *pkt, int len);
944 #endif
945
946 static struct usbtouch_device_info usbtouch_dev_info[] = {
947 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
948 [DEVTYPE_EGALAX] = {
949 .min_xc = 0x0,
950 .max_xc = 0x07ff,
951 .min_yc = 0x0,
952 .max_yc = 0x07ff,
953 .rept_size = 16,
954 .process_pkt = usbtouch_process_multi,
955 .get_pkt_len = egalax_get_pkt_len,
956 .read_data = egalax_read_data,
957 },
958 #endif
959
960 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
961 [DEVTYPE_PANJIT] = {
962 .min_xc = 0x0,
963 .max_xc = 0x0fff,
964 .min_yc = 0x0,
965 .max_yc = 0x0fff,
966 .rept_size = 8,
967 .read_data = panjit_read_data,
968 },
969 #endif
970
971 #ifdef CONFIG_TOUCHSCREEN_USB_3M
972 [DEVTYPE_3M] = {
973 .min_xc = 0x0,
974 .max_xc = 0x4000,
975 .min_yc = 0x0,
976 .max_yc = 0x4000,
977 .rept_size = 11,
978 .read_data = mtouch_read_data,
979 .init = mtouch_init,
980 },
981 #endif
982
983 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
984 [DEVTYPE_ITM] = {
985 .min_xc = 0x0,
986 .max_xc = 0x0fff,
987 .min_yc = 0x0,
988 .max_yc = 0x0fff,
989 .max_press = 0xff,
990 .rept_size = 8,
991 .read_data = itm_read_data,
992 },
993 #endif
994
995 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
996 [DEVTYPE_ETURBO] = {
997 .min_xc = 0x0,
998 .max_xc = 0x07ff,
999 .min_yc = 0x0,
1000 .max_yc = 0x07ff,
1001 .rept_size = 8,
1002 .process_pkt = usbtouch_process_multi,
1003 .get_pkt_len = eturbo_get_pkt_len,
1004 .read_data = eturbo_read_data,
1005 },
1006 #endif
1007
1008 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
1009 [DEVTYPE_GUNZE] = {
1010 .min_xc = 0x0,
1011 .max_xc = 0x0fff,
1012 .min_yc = 0x0,
1013 .max_yc = 0x0fff,
1014 .rept_size = 4,
1015 .read_data = gunze_read_data,
1016 },
1017 #endif
1018
1019 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
1020 [DEVTYPE_DMC_TSC10] = {
1021 .min_xc = 0x0,
1022 .max_xc = 0x03ff,
1023 .min_yc = 0x0,
1024 .max_yc = 0x03ff,
1025 .rept_size = 5,
1026 .init = dmc_tsc10_init,
1027 .read_data = dmc_tsc10_read_data,
1028 },
1029 #endif
1030
1031 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
1032 [DEVTYPE_IRTOUCH] = {
1033 .min_xc = 0x0,
1034 .max_xc = 0x0fff,
1035 .min_yc = 0x0,
1036 .max_yc = 0x0fff,
1037 .rept_size = 8,
1038 .read_data = irtouch_read_data,
1039 },
1040 #endif
1041
1042 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
1043 [DEVTYPE_IDEALTEK] = {
1044 .min_xc = 0x0,
1045 .max_xc = 0x0fff,
1046 .min_yc = 0x0,
1047 .max_yc = 0x0fff,
1048 .rept_size = 8,
1049 .process_pkt = usbtouch_process_multi,
1050 .get_pkt_len = idealtek_get_pkt_len,
1051 .read_data = idealtek_read_data,
1052 },
1053 #endif
1054
1055 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
1056 [DEVTYPE_GENERAL_TOUCH] = {
1057 .min_xc = 0x0,
1058 .max_xc = 0x7fff,
1059 .min_yc = 0x0,
1060 .max_yc = 0x7fff,
1061 .rept_size = 7,
1062 .read_data = general_touch_read_data,
1063 },
1064 #endif
1065
1066 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
1067 [DEVTYPE_GOTOP] = {
1068 .min_xc = 0x0,
1069 .max_xc = 0x03ff,
1070 .min_yc = 0x0,
1071 .max_yc = 0x03ff,
1072 .rept_size = 4,
1073 .read_data = gotop_read_data,
1074 },
1075 #endif
1076
1077 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
1078 [DEVTYPE_JASTEC] = {
1079 .min_xc = 0x0,
1080 .max_xc = 0x0fff,
1081 .min_yc = 0x0,
1082 .max_yc = 0x0fff,
1083 .rept_size = 4,
1084 .read_data = jastec_read_data,
1085 },
1086 #endif
1087
1088 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
1089 [DEVTYPE_E2I] = {
1090 .min_xc = 0x0,
1091 .max_xc = 0x7fff,
1092 .min_yc = 0x0,
1093 .max_yc = 0x7fff,
1094 .rept_size = 6,
1095 .init = e2i_init,
1096 .read_data = e2i_read_data,
1097 },
1098 #endif
1099
1100 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
1101 [DEVTYPE_ZYTRONIC] = {
1102 .min_xc = 0x0,
1103 .max_xc = 0x03ff,
1104 .min_yc = 0x0,
1105 .max_yc = 0x03ff,
1106 .rept_size = 5,
1107 .read_data = zytronic_read_data,
1108 .irq_always = true,
1109 },
1110 #endif
1111
1112 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
1113 [DEVTYPE_TC45USB] = {
1114 .min_xc = 0x0,
1115 .max_xc = 0x0fff,
1116 .min_yc = 0x0,
1117 .max_yc = 0x0fff,
1118 .rept_size = 5,
1119 .read_data = tc45usb_read_data,
1120 },
1121 #endif
1122
1123 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
1124 [DEVTYPE_NEXIO] = {
1125 .rept_size = 1024,
1126 .irq_always = true,
1127 .read_data = nexio_read_data,
1128 .init = nexio_init,
1129 .exit = nexio_exit,
1130 },
1131 #endif
1132 };
1133
1134
1135 /*****************************************************************************
1136 * Generic Part
1137 */
1138 static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
1139 unsigned char *pkt, int len)
1140 {
1141 struct usbtouch_device_info *type = usbtouch->type;
1142
1143 if (!type->read_data(usbtouch, pkt))
1144 return;
1145
1146 input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch);
1147
1148 if (swap_xy) {
1149 input_report_abs(usbtouch->input, ABS_X, usbtouch->y);
1150 input_report_abs(usbtouch->input, ABS_Y, usbtouch->x);
1151 } else {
1152 input_report_abs(usbtouch->input, ABS_X, usbtouch->x);
1153 input_report_abs(usbtouch->input, ABS_Y, usbtouch->y);
1154 }
1155 if (type->max_press)
1156 input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press);
1157 input_sync(usbtouch->input);
1158 }
1159
1160
1161 #ifdef MULTI_PACKET
1162 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1163 unsigned char *pkt, int len)
1164 {
1165 unsigned char *buffer;
1166 int pkt_len, pos, buf_len, tmp;
1167
1168 /* process buffer */
1169 if (unlikely(usbtouch->buf_len)) {
1170 /* try to get size */
1171 pkt_len = usbtouch->type->get_pkt_len(
1172 usbtouch->buffer, usbtouch->buf_len);
1173
1174 /* drop? */
1175 if (unlikely(!pkt_len))
1176 goto out_flush_buf;
1177
1178 /* need to append -pkt_len bytes before able to get size */
1179 if (unlikely(pkt_len < 0)) {
1180 int append = -pkt_len;
1181 if (unlikely(append > len))
1182 append = len;
1183 if (usbtouch->buf_len + append >= usbtouch->type->rept_size)
1184 goto out_flush_buf;
1185 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append);
1186 usbtouch->buf_len += append;
1187
1188 pkt_len = usbtouch->type->get_pkt_len(
1189 usbtouch->buffer, usbtouch->buf_len);
1190 if (pkt_len < 0)
1191 return;
1192 }
1193
1194 /* append */
1195 tmp = pkt_len - usbtouch->buf_len;
1196 if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size)
1197 goto out_flush_buf;
1198 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp);
1199 usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len);
1200
1201 buffer = pkt + tmp;
1202 buf_len = len - tmp;
1203 } else {
1204 buffer = pkt;
1205 buf_len = len;
1206 }
1207
1208 /* loop over the received packet, process */
1209 pos = 0;
1210 while (pos < buf_len) {
1211 /* get packet len */
1212 pkt_len = usbtouch->type->get_pkt_len(buffer + pos,
1213 buf_len - pos);
1214
1215 /* unknown packet: skip one byte */
1216 if (unlikely(!pkt_len)) {
1217 pos++;
1218 continue;
1219 }
1220
1221 /* full packet: process */
1222 if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) {
1223 usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len);
1224 } else {
1225 /* incomplete packet: save in buffer */
1226 memcpy(usbtouch->buffer, buffer + pos, buf_len - pos);
1227 usbtouch->buf_len = buf_len - pos;
1228 return;
1229 }
1230 pos += pkt_len;
1231 }
1232
1233 out_flush_buf:
1234 usbtouch->buf_len = 0;
1235 return;
1236 }
1237 #endif
1238
1239
1240 static void usbtouch_irq(struct urb *urb)
1241 {
1242 struct usbtouch_usb *usbtouch = urb->context;
1243 int retval;
1244
1245 switch (urb->status) {
1246 case 0:
1247 /* success */
1248 break;
1249 case -ETIME:
1250 /* this urb is timing out */
1251 dbg("%s - urb timed out - was the device unplugged?",
1252 __func__);
1253 return;
1254 case -ECONNRESET:
1255 case -ENOENT:
1256 case -ESHUTDOWN:
1257 case -EPIPE:
1258 /* this urb is terminated, clean up */
1259 dbg("%s - urb shutting down with status: %d",
1260 __func__, urb->status);
1261 return;
1262 default:
1263 dbg("%s - nonzero urb status received: %d",
1264 __func__, urb->status);
1265 goto exit;
1266 }
1267
1268 usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length);
1269
1270 exit:
1271 retval = usb_submit_urb(urb, GFP_ATOMIC);
1272 if (retval)
1273 err("%s - usb_submit_urb failed with result: %d",
1274 __func__, retval);
1275 }
1276
1277 static int usbtouch_open(struct input_dev *input)
1278 {
1279 struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1280
1281 usbtouch->irq->dev = interface_to_usbdev(usbtouch->interface);
1282
1283 if (!usbtouch->type->irq_always) {
1284 if (usb_submit_urb(usbtouch->irq, GFP_KERNEL))
1285 return -EIO;
1286 }
1287
1288 return 0;
1289 }
1290
1291 static void usbtouch_close(struct input_dev *input)
1292 {
1293 struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1294
1295 if (!usbtouch->type->irq_always)
1296 usb_kill_urb(usbtouch->irq);
1297 }
1298
1299
1300 static void usbtouch_free_buffers(struct usb_device *udev,
1301 struct usbtouch_usb *usbtouch)
1302 {
1303 usb_free_coherent(udev, usbtouch->type->rept_size,
1304 usbtouch->data, usbtouch->data_dma);
1305 kfree(usbtouch->buffer);
1306 }
1307
1308 static struct usb_endpoint_descriptor *
1309 usbtouch_get_input_endpoint(struct usb_host_interface *interface)
1310 {
1311 int i;
1312
1313 for (i = 0; i < interface->desc.bNumEndpoints; i++)
1314 if (usb_endpoint_dir_in(&interface->endpoint[i].desc))
1315 return &interface->endpoint[i].desc;
1316
1317 return NULL;
1318 }
1319
1320 static int usbtouch_probe(struct usb_interface *intf,
1321 const struct usb_device_id *id)
1322 {
1323 struct usbtouch_usb *usbtouch;
1324 struct input_dev *input_dev;
1325 struct usb_endpoint_descriptor *endpoint;
1326 struct usb_device *udev = interface_to_usbdev(intf);
1327 struct usbtouch_device_info *type;
1328 int err = -ENOMEM;
1329
1330 /* some devices are ignored */
1331 if (id->driver_info == DEVTYPE_IGNORE)
1332 return -ENODEV;
1333
1334 endpoint = usbtouch_get_input_endpoint(intf->cur_altsetting);
1335 if (!endpoint)
1336 return -ENXIO;
1337
1338 usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL);
1339 input_dev = input_allocate_device();
1340 if (!usbtouch || !input_dev)
1341 goto out_free;
1342
1343 type = &usbtouch_dev_info[id->driver_info];
1344 usbtouch->type = type;
1345 if (!type->process_pkt)
1346 type->process_pkt = usbtouch_process_pkt;
1347
1348 usbtouch->data = usb_alloc_coherent(udev, type->rept_size,
1349 GFP_KERNEL, &usbtouch->data_dma);
1350 if (!usbtouch->data)
1351 goto out_free;
1352
1353 if (type->get_pkt_len) {
1354 usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL);
1355 if (!usbtouch->buffer)
1356 goto out_free_buffers;
1357 }
1358
1359 usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
1360 if (!usbtouch->irq) {
1361 dbg("%s - usb_alloc_urb failed: usbtouch->irq", __func__);
1362 goto out_free_buffers;
1363 }
1364
1365 usbtouch->interface = intf;
1366 usbtouch->input = input_dev;
1367
1368 if (udev->manufacturer)
1369 strlcpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name));
1370
1371 if (udev->product) {
1372 if (udev->manufacturer)
1373 strlcat(usbtouch->name, " ", sizeof(usbtouch->name));
1374 strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name));
1375 }
1376
1377 if (!strlen(usbtouch->name))
1378 snprintf(usbtouch->name, sizeof(usbtouch->name),
1379 "USB Touchscreen %04x:%04x",
1380 le16_to_cpu(udev->descriptor.idVendor),
1381 le16_to_cpu(udev->descriptor.idProduct));
1382
1383 usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys));
1384 strlcat(usbtouch->phys, "/input0", sizeof(usbtouch->phys));
1385
1386 input_dev->name = usbtouch->name;
1387 input_dev->phys = usbtouch->phys;
1388 usb_to_input_id(udev, &input_dev->id);
1389 input_dev->dev.parent = &intf->dev;
1390
1391 input_set_drvdata(input_dev, usbtouch);
1392
1393 input_dev->open = usbtouch_open;
1394 input_dev->close = usbtouch_close;
1395
1396 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
1397 input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
1398 input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0);
1399 input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0);
1400 if (type->max_press)
1401 input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press,
1402 type->max_press, 0, 0);
1403
1404 if (usb_endpoint_type(endpoint) == USB_ENDPOINT_XFER_INT)
1405 usb_fill_int_urb(usbtouch->irq, udev,
1406 usb_rcvintpipe(udev, endpoint->bEndpointAddress),
1407 usbtouch->data, type->rept_size,
1408 usbtouch_irq, usbtouch, endpoint->bInterval);
1409 else
1410 usb_fill_bulk_urb(usbtouch->irq, udev,
1411 usb_rcvbulkpipe(udev, endpoint->bEndpointAddress),
1412 usbtouch->data, type->rept_size,
1413 usbtouch_irq, usbtouch);
1414
1415 usbtouch->irq->dev = udev;
1416 usbtouch->irq->transfer_dma = usbtouch->data_dma;
1417 usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1418
1419 /* device specific init */
1420 if (type->init) {
1421 err = type->init(usbtouch);
1422 if (err) {
1423 dbg("%s - type->init() failed, err: %d", __func__, err);
1424 goto out_free_urb;
1425 }
1426 }
1427
1428 err = input_register_device(usbtouch->input);
1429 if (err) {
1430 dbg("%s - input_register_device failed, err: %d", __func__, err);
1431 goto out_do_exit;
1432 }
1433
1434 usb_set_intfdata(intf, usbtouch);
1435
1436 if (usbtouch->type->irq_always) {
1437 err = usb_submit_urb(usbtouch->irq, GFP_KERNEL);
1438 if (err) {
1439 err("%s - usb_submit_urb failed with result: %d",
1440 __func__, err);
1441 goto out_unregister_input;
1442 }
1443 }
1444
1445 return 0;
1446
1447 out_unregister_input:
1448 input_unregister_device(input_dev);
1449 input_dev = NULL;
1450 out_do_exit:
1451 if (type->exit)
1452 type->exit(usbtouch);
1453 out_free_urb:
1454 usb_free_urb(usbtouch->irq);
1455 out_free_buffers:
1456 usbtouch_free_buffers(udev, usbtouch);
1457 out_free:
1458 input_free_device(input_dev);
1459 kfree(usbtouch);
1460 return err;
1461 }
1462
1463 static void usbtouch_disconnect(struct usb_interface *intf)
1464 {
1465 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1466
1467 dbg("%s - called", __func__);
1468
1469 if (!usbtouch)
1470 return;
1471
1472 dbg("%s - usbtouch is initialized, cleaning up", __func__);
1473 usb_set_intfdata(intf, NULL);
1474 /* this will stop IO via close */
1475 input_unregister_device(usbtouch->input);
1476 usb_free_urb(usbtouch->irq);
1477 if (usbtouch->type->exit)
1478 usbtouch->type->exit(usbtouch);
1479 usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch);
1480 kfree(usbtouch);
1481 }
1482
1483 MODULE_DEVICE_TABLE(usb, usbtouch_devices);
1484
1485 static struct usb_driver usbtouch_driver = {
1486 .name = "usbtouchscreen",
1487 .probe = usbtouch_probe,
1488 .disconnect = usbtouch_disconnect,
1489 .id_table = usbtouch_devices,
1490 };
1491
1492 static int __init usbtouch_init(void)
1493 {
1494 return usb_register(&usbtouch_driver);
1495 }
1496
1497 static void __exit usbtouch_cleanup(void)
1498 {
1499 usb_deregister(&usbtouch_driver);
1500 }
1501
1502 module_init(usbtouch_init);
1503 module_exit(usbtouch_cleanup);
1504
1505 MODULE_AUTHOR(DRIVER_AUTHOR);
1506 MODULE_DESCRIPTION(DRIVER_DESC);
1507 MODULE_LICENSE("GPL");
1508
1509 MODULE_ALIAS("touchkitusb");
1510 MODULE_ALIAS("itmtouch");
1511 MODULE_ALIAS("mtouchusb");
Linux kernel - Deliverables
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