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