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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[cris-mirror.git] / drivers / input / touchscreen / usbtouchscreen.c
blobaa77d243b78605e09ac0c2adf9e2eff57bdc51fe
1 /******************************************************************************
2 * usbtouchscreen.c
3 * Driver for USB Touchscreens, supporting those devices:
4 * - eGalax Touchkit
5 * includes eTurboTouch CT-410/510/700
6 * - 3M/Microtouch EX II series
7 * - ITM
8 * - PanJit TouchSet
9 * - eTurboTouch
10 * - Gunze AHL61
11 * - DMC TSC-10/25
12 * - IRTOUCHSYSTEMS/UNITOP
13 * - IdealTEK URTC1000
14 * - General Touch
15 * - GoTop Super_Q2/GogoPen/PenPower tablets
16 * - JASTEC USB touch controller/DigiTech DTR-02U
17 * - Zytronic capacitive touchscreen
18 * - NEXIO/iNexio
19 * - Elo TouchSystems 2700 IntelliTouch
20 * - EasyTouch USB Dual/Multi touch controller from Data Modul
21 *
22 * Copyright (C) 2004-2007 by Daniel Ritz <daniel.ritz@gmx.ch>
23 * Copyright (C) by Todd E. Johnson (mtouchusb.c)
24 *
25 * This program is free software; you can redistribute it and/or
26 * modify it under the terms of the GNU General Public License as
27 * published by the Free Software Foundation; either version 2 of the
28 * License, or (at your option) any later version.
29 *
30 * This program is distributed in the hope that it will be useful, but
31 * WITHOUT ANY WARRANTY; without even the implied warranty of
32 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
33 * General Public License for more details.
34 *
35 * You should have received a copy of the GNU General Public License
36 * along with this program; if not, write to the Free Software
37 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
38 *
39 * Driver is based on touchkitusb.c
40 * - ITM parts are from itmtouch.c
41 * - 3M parts are from mtouchusb.c
42 * - PanJit parts are from an unmerged driver by Lanslott Gish
43 * - DMC TSC 10/25 are from Holger Schurig, with ideas from an unmerged
44 * driver from Marius Vollmer
45 *
46 *****************************************************************************/
47
48 //#define DEBUG
49
50 #include <linux/kernel.h>
51 #include <linux/slab.h>
52 #include <linux/input.h>
53 #include <linux/module.h>
54 #include <linux/usb.h>
55 #include <linux/usb/input.h>
56 #include <linux/hid.h>
57
58 static bool swap_xy;
59 module_param(swap_xy, bool, 0644);
60 MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");
61
62 static bool hwcalib_xy;
63 module_param(hwcalib_xy, bool, 0644);
64 MODULE_PARM_DESC(hwcalib_xy, "If set hw-calibrated X/Y are used if available");
65
66 /* device specifc data/functions */
67 struct usbtouch_usb;
68 struct usbtouch_device_info {
69 int min_xc, max_xc;
70 int min_yc, max_yc;
71 int min_press, max_press;
72 int rept_size;
73
74 /*
75 * Always service the USB devices irq not just when the input device is
76 * open. This is useful when devices have a watchdog which prevents us
77 * from periodically polling the device. Leave this unset unless your
78 * touchscreen device requires it, as it does consume more of the USB
79 * bandwidth.
80 */
81 bool irq_always;
82
83 void (*process_pkt) (struct usbtouch_usb *usbtouch, unsigned char *pkt, int len);
84
85 /*
86 * used to get the packet len. possible return values:
87 * > 0: packet len
88 * = 0: skip one byte
89 * < 0: -return value more bytes needed
90 */
91 int (*get_pkt_len) (unsigned char *pkt, int len);
92
93 int (*read_data) (struct usbtouch_usb *usbtouch, unsigned char *pkt);
94 int (*alloc) (struct usbtouch_usb *usbtouch);
95 int (*init) (struct usbtouch_usb *usbtouch);
96 void (*exit) (struct usbtouch_usb *usbtouch);
97 };
98
99 /* a usbtouch device */
100 struct usbtouch_usb {
101 unsigned char *data;
102 dma_addr_t data_dma;
103 int data_size;
104 unsigned char *buffer;
105 int buf_len;
106 struct urb *irq;
107 struct usb_interface *interface;
108 struct input_dev *input;
109 struct usbtouch_device_info *type;
110 char name[128];
111 char phys[64];
112 void *priv;
113
114 int x, y;
115 int touch, press;
116 };
117
118
119 /* device types */
120 enum {
121 DEVTYPE_IGNORE = -1,
122 DEVTYPE_EGALAX,
123 DEVTYPE_PANJIT,
124 DEVTYPE_3M,
125 DEVTYPE_ITM,
126 DEVTYPE_ETURBO,
127 DEVTYPE_GUNZE,
128 DEVTYPE_DMC_TSC10,
129 DEVTYPE_IRTOUCH,
130 DEVTYPE_IRTOUCH_HIRES,
131 DEVTYPE_IDEALTEK,
132 DEVTYPE_GENERAL_TOUCH,
133 DEVTYPE_GOTOP,
134 DEVTYPE_JASTEC,
135 DEVTYPE_E2I,
136 DEVTYPE_ZYTRONIC,
137 DEVTYPE_TC45USB,
138 DEVTYPE_NEXIO,
139 DEVTYPE_ELO,
140 DEVTYPE_ETOUCH,
141 };
142
143 #define USB_DEVICE_HID_CLASS(vend, prod) \
144 .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS \
145 | USB_DEVICE_ID_MATCH_DEVICE, \
146 .idVendor = (vend), \
147 .idProduct = (prod), \
148 .bInterfaceClass = USB_INTERFACE_CLASS_HID
149
150 static const struct usb_device_id usbtouch_devices[] = {
151 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
152 /* ignore the HID capable devices, handled by usbhid */
153 {USB_DEVICE_HID_CLASS(0x0eef, 0x0001), .driver_info = DEVTYPE_IGNORE},
154 {USB_DEVICE_HID_CLASS(0x0eef, 0x0002), .driver_info = DEVTYPE_IGNORE},
155
156 /* normal device IDs */
157 {USB_DEVICE(0x3823, 0x0001), .driver_info = DEVTYPE_EGALAX},
158 {USB_DEVICE(0x3823, 0x0002), .driver_info = DEVTYPE_EGALAX},
159 {USB_DEVICE(0x0123, 0x0001), .driver_info = DEVTYPE_EGALAX},
160 {USB_DEVICE(0x0eef, 0x0001), .driver_info = DEVTYPE_EGALAX},
161 {USB_DEVICE(0x0eef, 0x0002), .driver_info = DEVTYPE_EGALAX},
162 {USB_DEVICE(0x1234, 0x0001), .driver_info = DEVTYPE_EGALAX},
163 {USB_DEVICE(0x1234, 0x0002), .driver_info = DEVTYPE_EGALAX},
164 #endif
165
166 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
167 {USB_DEVICE(0x134c, 0x0001), .driver_info = DEVTYPE_PANJIT},
168 {USB_DEVICE(0x134c, 0x0002), .driver_info = DEVTYPE_PANJIT},
169 {USB_DEVICE(0x134c, 0x0003), .driver_info = DEVTYPE_PANJIT},
170 {USB_DEVICE(0x134c, 0x0004), .driver_info = DEVTYPE_PANJIT},
171 #endif
172
173 #ifdef CONFIG_TOUCHSCREEN_USB_3M
174 {USB_DEVICE(0x0596, 0x0001), .driver_info = DEVTYPE_3M},
175 #endif
176
177 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
178 {USB_DEVICE(0x0403, 0xf9e9), .driver_info = DEVTYPE_ITM},
179 {USB_DEVICE(0x16e3, 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 {USB_DEVICE(0x6615, 0x0012), .driver_info = DEVTYPE_IRTOUCH_HIRES},
198 #endif
199
200 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
201 {USB_DEVICE(0x1391, 0x1000), .driver_info = DEVTYPE_IDEALTEK},
202 #endif
203
204 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
205 {USB_DEVICE(0x0dfc, 0x0001), .driver_info = DEVTYPE_GENERAL_TOUCH},
206 #endif
207
208 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
209 {USB_DEVICE(0x08f2, 0x007f), .driver_info = DEVTYPE_GOTOP},
210 {USB_DEVICE(0x08f2, 0x00ce), .driver_info = DEVTYPE_GOTOP},
211 {USB_DEVICE(0x08f2, 0x00f4), .driver_info = DEVTYPE_GOTOP},
212 #endif
213
214 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
215 {USB_DEVICE(0x0f92, 0x0001), .driver_info = DEVTYPE_JASTEC},
216 #endif
217
218 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
219 {USB_DEVICE(0x1ac7, 0x0001), .driver_info = DEVTYPE_E2I},
220 #endif
221
222 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
223 {USB_DEVICE(0x14c8, 0x0003), .driver_info = DEVTYPE_ZYTRONIC},
224 #endif
225
226 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
227 /* TC5UH */
228 {USB_DEVICE(0x0664, 0x0309), .driver_info = DEVTYPE_TC45USB},
229 /* TC4UM */
230 {USB_DEVICE(0x0664, 0x0306), .driver_info = DEVTYPE_TC45USB},
231 #endif
232
233 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
234 /* data interface only */
235 {USB_DEVICE_AND_INTERFACE_INFO(0x10f0, 0x2002, 0x0a, 0x00, 0x00),
236 .driver_info = DEVTYPE_NEXIO},
237 {USB_DEVICE_AND_INTERFACE_INFO(0x1870, 0x0001, 0x0a, 0x00, 0x00),
238 .driver_info = DEVTYPE_NEXIO},
239 #endif
240
241 #ifdef CONFIG_TOUCHSCREEN_USB_ELO
242 {USB_DEVICE(0x04e7, 0x0020), .driver_info = DEVTYPE_ELO},
243 #endif
244
245 #ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
246 {USB_DEVICE(0x7374, 0x0001), .driver_info = DEVTYPE_ETOUCH},
247 #endif
248
249 {}
250 };
251
252
253 /*****************************************************************************
254 * e2i Part
255 */
256
257 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
258 static int e2i_init(struct usbtouch_usb *usbtouch)
259 {
260 int ret;
261 struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
262
263 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
264 0x01, 0x02, 0x0000, 0x0081,
265 NULL, 0, USB_CTRL_SET_TIMEOUT);
266
267 dev_dbg(&usbtouch->interface->dev,
268 "%s - usb_control_msg - E2I_RESET - bytes|err: %d\n",
269 __func__, ret);
270 return ret;
271 }
272
273 static int e2i_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
274 {
275 int tmp = (pkt[0] << 8) | pkt[1];
276 dev->x = (pkt[2] << 8) | pkt[3];
277 dev->y = (pkt[4] << 8) | pkt[5];
278
279 tmp = tmp - 0xA000;
280 dev->touch = (tmp > 0);
281 dev->press = (tmp > 0 ? tmp : 0);
282
283 return 1;
284 }
285 #endif
286
287
288 /*****************************************************************************
289 * eGalax part
290 */
291
292 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
293
294 #ifndef MULTI_PACKET
295 #define MULTI_PACKET
296 #endif
297
298 #define EGALAX_PKT_TYPE_MASK 0xFE
299 #define EGALAX_PKT_TYPE_REPT 0x80
300 #define EGALAX_PKT_TYPE_DIAG 0x0A
301
302 static int egalax_init(struct usbtouch_usb *usbtouch)
303 {
304 int ret, i;
305 unsigned char *buf;
306 struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
307
308 /*
309 * An eGalax diagnostic packet kicks the device into using the right
310 * protocol. We send a "check active" packet. The response will be
311 * read later and ignored.
312 */
313
314 buf = kmalloc(3, GFP_KERNEL);
315 if (!buf)
316 return -ENOMEM;
317
318 buf[0] = EGALAX_PKT_TYPE_DIAG;
319 buf[1] = 1; /* length */
320 buf[2] = 'A'; /* command - check active */
321
322 for (i = 0; i < 3; i++) {
323 ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
324 0,
325 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
326 0, 0, buf, 3,
327 USB_CTRL_SET_TIMEOUT);
328 if (ret >= 0) {
329 ret = 0;
330 break;
331 }
332 if (ret != -EPIPE)
333 break;
334 }
335
336 kfree(buf);
337
338 return ret;
339 }
340
341 static int egalax_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
342 {
343 if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT)
344 return 0;
345
346 dev->x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F);
347 dev->y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F);
348 dev->touch = pkt[0] & 0x01;
349
350 return 1;
351 }
352
353 static int egalax_get_pkt_len(unsigned char *buf, int len)
354 {
355 switch (buf[0] & EGALAX_PKT_TYPE_MASK) {
356 case EGALAX_PKT_TYPE_REPT:
357 return 5;
358
359 case EGALAX_PKT_TYPE_DIAG:
360 if (len < 2)
361 return -1;
362
363 return buf[1] + 2;
364 }
365
366 return 0;
367 }
368 #endif
369
370 /*****************************************************************************
371 * EasyTouch part
372 */
373
374 #ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
375
376 #ifndef MULTI_PACKET
377 #define MULTI_PACKET
378 #endif
379
380 #define ETOUCH_PKT_TYPE_MASK 0xFE
381 #define ETOUCH_PKT_TYPE_REPT 0x80
382 #define ETOUCH_PKT_TYPE_REPT2 0xB0
383 #define ETOUCH_PKT_TYPE_DIAG 0x0A
384
385 static int etouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
386 {
387 if ((pkt[0] & ETOUCH_PKT_TYPE_MASK) != ETOUCH_PKT_TYPE_REPT &&
388 (pkt[0] & ETOUCH_PKT_TYPE_MASK) != ETOUCH_PKT_TYPE_REPT2)
389 return 0;
390
391 dev->x = ((pkt[1] & 0x1F) << 7) | (pkt[2] & 0x7F);
392 dev->y = ((pkt[3] & 0x1F) << 7) | (pkt[4] & 0x7F);
393 dev->touch = pkt[0] & 0x01;
394
395 return 1;
396 }
397
398 static int etouch_get_pkt_len(unsigned char *buf, int len)
399 {
400 switch (buf[0] & ETOUCH_PKT_TYPE_MASK) {
401 case ETOUCH_PKT_TYPE_REPT:
402 case ETOUCH_PKT_TYPE_REPT2:
403 return 5;
404
405 case ETOUCH_PKT_TYPE_DIAG:
406 if (len < 2)
407 return -1;
408
409 return buf[1] + 2;
410 }
411
412 return 0;
413 }
414 #endif
415
416 /*****************************************************************************
417 * PanJit Part
418 */
419 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
420 static int panjit_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
421 {
422 dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
423 dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
424 dev->touch = pkt[0] & 0x01;
425
426 return 1;
427 }
428 #endif
429
430
431 /*****************************************************************************
432 * 3M/Microtouch Part
433 */
434 #ifdef CONFIG_TOUCHSCREEN_USB_3M
435
436 #define MTOUCHUSB_ASYNC_REPORT 1
437 #define MTOUCHUSB_RESET 7
438 #define MTOUCHUSB_REQ_CTRLLR_ID 10
439
440 static int mtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
441 {
442 if (hwcalib_xy) {
443 dev->x = (pkt[4] << 8) | pkt[3];
444 dev->y = 0xffff - ((pkt[6] << 8) | pkt[5]);
445 } else {
446 dev->x = (pkt[8] << 8) | pkt[7];
447 dev->y = (pkt[10] << 8) | pkt[9];
448 }
449 dev->touch = (pkt[2] & 0x40) ? 1 : 0;
450
451 return 1;
452 }
453
454 static int mtouch_init(struct usbtouch_usb *usbtouch)
455 {
456 int ret, i;
457 struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
458
459 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
460 MTOUCHUSB_RESET,
461 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
462 1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
463 dev_dbg(&usbtouch->interface->dev,
464 "%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d\n",
465 __func__, ret);
466 if (ret < 0)
467 return ret;
468 msleep(150);
469
470 for (i = 0; i < 3; i++) {
471 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
472 MTOUCHUSB_ASYNC_REPORT,
473 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
474 1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT);
475 dev_dbg(&usbtouch->interface->dev,
476 "%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d\n",
477 __func__, ret);
478 if (ret >= 0)
479 break;
480 if (ret != -EPIPE)
481 return ret;
482 }
483
484 /* Default min/max xy are the raw values, override if using hw-calib */
485 if (hwcalib_xy) {
486 input_set_abs_params(usbtouch->input, ABS_X, 0, 0xffff, 0, 0);
487 input_set_abs_params(usbtouch->input, ABS_Y, 0, 0xffff, 0, 0);
488 }
489
490 return 0;
491 }
492 #endif
493
494
495 /*****************************************************************************
496 * ITM Part
497 */
498 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
499 static int itm_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
500 {
501 int touch;
502 /*
503 * ITM devices report invalid x/y data if not touched.
504 * if the screen was touched before but is not touched any more
505 * report touch as 0 with the last valid x/y data once. then stop
506 * reporting data until touched again.
507 */
508 dev->press = ((pkt[2] & 0x01) << 7) | (pkt[5] & 0x7F);
509
510 touch = ~pkt[7] & 0x20;
511 if (!touch) {
512 if (dev->touch) {
513 dev->touch = 0;
514 return 1;
515 }
516
517 return 0;
518 }
519
520 dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F);
521 dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F);
522 dev->touch = touch;
523
524 return 1;
525 }
526 #endif
527
528
529 /*****************************************************************************
530 * eTurboTouch part
531 */
532 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
533 #ifndef MULTI_PACKET
534 #define MULTI_PACKET
535 #endif
536 static int eturbo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
537 {
538 unsigned int shift;
539
540 /* packets should start with sync */
541 if (!(pkt[0] & 0x80))
542 return 0;
543
544 shift = (6 - (pkt[0] & 0x03));
545 dev->x = ((pkt[3] << 7) | pkt[4]) >> shift;
546 dev->y = ((pkt[1] << 7) | pkt[2]) >> shift;
547 dev->touch = (pkt[0] & 0x10) ? 1 : 0;
548
549 return 1;
550 }
551
552 static int eturbo_get_pkt_len(unsigned char *buf, int len)
553 {
554 if (buf[0] & 0x80)
555 return 5;
556 if (buf[0] == 0x01)
557 return 3;
558 return 0;
559 }
560 #endif
561
562
563 /*****************************************************************************
564 * Gunze part
565 */
566 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
567 static int gunze_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
568 {
569 if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80))
570 return 0;
571
572 dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F);
573 dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F);
574 dev->touch = pkt[0] & 0x20;
575
576 return 1;
577 }
578 #endif
579
580 /*****************************************************************************
581 * DMC TSC-10/25 Part
582 *
583 * Documentation about the controller and it's protocol can be found at
584 * http://www.dmccoltd.com/files/controler/tsc10usb_pi_e.pdf
585 * http://www.dmccoltd.com/files/controler/tsc25_usb_e.pdf
586 */
587 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
588
589 /* supported data rates. currently using 130 */
590 #define TSC10_RATE_POINT 0x50
591 #define TSC10_RATE_30 0x40
592 #define TSC10_RATE_50 0x41
593 #define TSC10_RATE_80 0x42
594 #define TSC10_RATE_100 0x43
595 #define TSC10_RATE_130 0x44
596 #define TSC10_RATE_150 0x45
597
598 /* commands */
599 #define TSC10_CMD_RESET 0x55
600 #define TSC10_CMD_RATE 0x05
601 #define TSC10_CMD_DATA1 0x01
602
603 static int dmc_tsc10_init(struct usbtouch_usb *usbtouch)
604 {
605 struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
606 int ret = -ENOMEM;
607 unsigned char *buf;
608
609 buf = kmalloc(2, GFP_NOIO);
610 if (!buf)
611 goto err_nobuf;
612 /* reset */
613 buf[0] = buf[1] = 0xFF;
614 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
615 TSC10_CMD_RESET,
616 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
617 0, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
618 if (ret < 0)
619 goto err_out;
620 if (buf[0] != 0x06) {
621 ret = -ENODEV;
622 goto err_out;
623 }
624
625 /* TSC-25 data sheet specifies a delay after the RESET command */
626 msleep(150);
627
628 /* set coordinate output rate */
629 buf[0] = buf[1] = 0xFF;
630 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
631 TSC10_CMD_RATE,
632 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
633 TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
634 if (ret < 0)
635 goto err_out;
636 if ((buf[0] != 0x06) && (buf[0] != 0x15 || buf[1] != 0x01)) {
637 ret = -ENODEV;
638 goto err_out;
639 }
640
641 /* start sending data */
642 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
643 TSC10_CMD_DATA1,
644 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
645 0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
646 err_out:
647 kfree(buf);
648 err_nobuf:
649 return ret;
650 }
651
652
653 static int dmc_tsc10_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
654 {
655 dev->x = ((pkt[2] & 0x03) << 8) | pkt[1];
656 dev->y = ((pkt[4] & 0x03) << 8) | pkt[3];
657 dev->touch = pkt[0] & 0x01;
658
659 return 1;
660 }
661 #endif
662
663
664 /*****************************************************************************
665 * IRTOUCH Part
666 */
667 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
668 static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
669 {
670 dev->x = (pkt[3] << 8) | pkt[2];
671 dev->y = (pkt[5] << 8) | pkt[4];
672 dev->touch = (pkt[1] & 0x03) ? 1 : 0;
673
674 return 1;
675 }
676 #endif
677
678 /*****************************************************************************
679 * ET&T TC5UH/TC4UM part
680 */
681 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
682 static int tc45usb_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
683 {
684 dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
685 dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
686 dev->touch = pkt[0] & 0x01;
687
688 return 1;
689 }
690 #endif
691
692 /*****************************************************************************
693 * IdealTEK URTC1000 Part
694 */
695 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
696 #ifndef MULTI_PACKET
697 #define MULTI_PACKET
698 #endif
699 static int idealtek_get_pkt_len(unsigned char *buf, int len)
700 {
701 if (buf[0] & 0x80)
702 return 5;
703 if (buf[0] == 0x01)
704 return len;
705 return 0;
706 }
707
708 static int idealtek_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
709 {
710 switch (pkt[0] & 0x98) {
711 case 0x88:
712 /* touch data in IdealTEK mode */
713 dev->x = (pkt[1] << 5) | (pkt[2] >> 2);
714 dev->y = (pkt[3] << 5) | (pkt[4] >> 2);
715 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
716 return 1;
717
718 case 0x98:
719 /* touch data in MT emulation mode */
720 dev->x = (pkt[2] << 5) | (pkt[1] >> 2);
721 dev->y = (pkt[4] << 5) | (pkt[3] >> 2);
722 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
723 return 1;
724
725 default:
726 return 0;
727 }
728 }
729 #endif
730
731 /*****************************************************************************
732 * General Touch Part
733 */
734 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
735 static int general_touch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
736 {
737 dev->x = (pkt[2] << 8) | pkt[1];
738 dev->y = (pkt[4] << 8) | pkt[3];
739 dev->press = pkt[5] & 0xff;
740 dev->touch = pkt[0] & 0x01;
741
742 return 1;
743 }
744 #endif
745
746 /*****************************************************************************
747 * GoTop Part
748 */
749 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
750 static int gotop_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
751 {
752 dev->x = ((pkt[1] & 0x38) << 4) | pkt[2];
753 dev->y = ((pkt[1] & 0x07) << 7) | pkt[3];
754 dev->touch = pkt[0] & 0x01;
755
756 return 1;
757 }
758 #endif
759
760 /*****************************************************************************
761 * JASTEC Part
762 */
763 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
764 static int jastec_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
765 {
766 dev->x = ((pkt[0] & 0x3f) << 6) | (pkt[2] & 0x3f);
767 dev->y = ((pkt[1] & 0x3f) << 6) | (pkt[3] & 0x3f);
768 dev->touch = (pkt[0] & 0x40) >> 6;
769
770 return 1;
771 }
772 #endif
773
774 /*****************************************************************************
775 * Zytronic Part
776 */
777 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
778 static int zytronic_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
779 {
780 struct usb_interface *intf = dev->interface;
781
782 switch (pkt[0]) {
783 case 0x3A: /* command response */
784 dev_dbg(&intf->dev, "%s: Command response %d\n", __func__, pkt[1]);
785 break;
786
787 case 0xC0: /* down */
788 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
789 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
790 dev->touch = 1;
791 dev_dbg(&intf->dev, "%s: down %d,%d\n", __func__, dev->x, dev->y);
792 return 1;
793
794 case 0x80: /* up */
795 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
796 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
797 dev->touch = 0;
798 dev_dbg(&intf->dev, "%s: up %d,%d\n", __func__, dev->x, dev->y);
799 return 1;
800
801 default:
802 dev_dbg(&intf->dev, "%s: Unknown return %d\n", __func__, pkt[0]);
803 break;
804 }
805
806 return 0;
807 }
808 #endif
809
810 /*****************************************************************************
811 * NEXIO Part
812 */
813 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
814
815 #define NEXIO_TIMEOUT 5000
816 #define NEXIO_BUFSIZE 1024
817 #define NEXIO_THRESHOLD 50
818
819 struct nexio_priv {
820 struct urb *ack;
821 unsigned char *ack_buf;
822 };
823
824 struct nexio_touch_packet {
825 u8 flags; /* 0xe1 = touch, 0xe1 = release */
826 __be16 data_len; /* total bytes of touch data */
827 __be16 x_len; /* bytes for X axis */
828 __be16 y_len; /* bytes for Y axis */
829 u8 data[];
830 } __attribute__ ((packed));
831
832 static unsigned char nexio_ack_pkt[2] = { 0xaa, 0x02 };
833 static unsigned char nexio_init_pkt[4] = { 0x82, 0x04, 0x0a, 0x0f };
834
835 static void nexio_ack_complete(struct urb *urb)
836 {
837 }
838
839 static int nexio_alloc(struct usbtouch_usb *usbtouch)
840 {
841 struct nexio_priv *priv;
842 int ret = -ENOMEM;
843
844 usbtouch->priv = kmalloc(sizeof(struct nexio_priv), GFP_KERNEL);
845 if (!usbtouch->priv)
846 goto out_buf;
847
848 priv = usbtouch->priv;
849
850 priv->ack_buf = kmemdup(nexio_ack_pkt, sizeof(nexio_ack_pkt),
851 GFP_KERNEL);
852 if (!priv->ack_buf)
853 goto err_priv;
854
855 priv->ack = usb_alloc_urb(0, GFP_KERNEL);
856 if (!priv->ack) {
857 dev_dbg(&usbtouch->interface->dev,
858 "%s - usb_alloc_urb failed: usbtouch->ack\n", __func__);
859 goto err_ack_buf;
860 }
861
862 return 0;
863
864 err_ack_buf:
865 kfree(priv->ack_buf);
866 err_priv:
867 kfree(priv);
868 out_buf:
869 return ret;
870 }
871
872 static int nexio_init(struct usbtouch_usb *usbtouch)
873 {
874 struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
875 struct usb_host_interface *interface = usbtouch->interface->cur_altsetting;
876 struct nexio_priv *priv = usbtouch->priv;
877 int ret = -ENOMEM;
878 int actual_len, i;
879 unsigned char *buf;
880 char *firmware_ver = NULL, *device_name = NULL;
881 int input_ep = 0, output_ep = 0;
882
883 /* find first input and output endpoint */
884 for (i = 0; i < interface->desc.bNumEndpoints; i++) {
885 if (!input_ep &&
886 usb_endpoint_dir_in(&interface->endpoint[i].desc))
887 input_ep = interface->endpoint[i].desc.bEndpointAddress;
888 if (!output_ep &&
889 usb_endpoint_dir_out(&interface->endpoint[i].desc))
890 output_ep = interface->endpoint[i].desc.bEndpointAddress;
891 }
892 if (!input_ep || !output_ep)
893 return -ENXIO;
894
895 buf = kmalloc(NEXIO_BUFSIZE, GFP_NOIO);
896 if (!buf)
897 goto out_buf;
898
899 /* two empty reads */
900 for (i = 0; i < 2; i++) {
901 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
902 buf, NEXIO_BUFSIZE, &actual_len,
903 NEXIO_TIMEOUT);
904 if (ret < 0)
905 goto out_buf;
906 }
907
908 /* send init command */
909 memcpy(buf, nexio_init_pkt, sizeof(nexio_init_pkt));
910 ret = usb_bulk_msg(dev, usb_sndbulkpipe(dev, output_ep),
911 buf, sizeof(nexio_init_pkt), &actual_len,
912 NEXIO_TIMEOUT);
913 if (ret < 0)
914 goto out_buf;
915
916 /* read replies */
917 for (i = 0; i < 3; i++) {
918 memset(buf, 0, NEXIO_BUFSIZE);
919 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
920 buf, NEXIO_BUFSIZE, &actual_len,
921 NEXIO_TIMEOUT);
922 if (ret < 0 || actual_len < 1 || buf[1] != actual_len)
923 continue;
924 switch (buf[0]) {
925 case 0x83: /* firmware version */
926 if (!firmware_ver)
927 firmware_ver = kstrdup(&buf[2], GFP_NOIO);
928 break;
929 case 0x84: /* device name */
930 if (!device_name)
931 device_name = kstrdup(&buf[2], GFP_NOIO);
932 break;
933 }
934 }
935
936 printk(KERN_INFO "Nexio device: %s, firmware version: %s\n",
937 device_name, firmware_ver);
938
939 kfree(firmware_ver);
940 kfree(device_name);
941
942 usb_fill_bulk_urb(priv->ack, dev, usb_sndbulkpipe(dev, output_ep),
943 priv->ack_buf, sizeof(nexio_ack_pkt),
944 nexio_ack_complete, usbtouch);
945 ret = 0;
946
947 out_buf:
948 kfree(buf);
949 return ret;
950 }
951
952 static void nexio_exit(struct usbtouch_usb *usbtouch)
953 {
954 struct nexio_priv *priv = usbtouch->priv;
955
956 usb_kill_urb(priv->ack);
957 usb_free_urb(priv->ack);
958 kfree(priv->ack_buf);
959 kfree(priv);
960 }
961
962 static int nexio_read_data(struct usbtouch_usb *usbtouch, unsigned char *pkt)
963 {
964 struct nexio_touch_packet *packet = (void *) pkt;
965 struct nexio_priv *priv = usbtouch->priv;
966 unsigned int data_len = be16_to_cpu(packet->data_len);
967 unsigned int x_len = be16_to_cpu(packet->x_len);
968 unsigned int y_len = be16_to_cpu(packet->y_len);
969 int x, y, begin_x, begin_y, end_x, end_y, w, h, ret;
970
971 /* got touch data? */
972 if ((pkt[0] & 0xe0) != 0xe0)
973 return 0;
974
975 if (data_len > 0xff)
976 data_len -= 0x100;
977 if (x_len > 0xff)
978 x_len -= 0x80;
979
980 /* send ACK */
981 ret = usb_submit_urb(priv->ack, GFP_ATOMIC);
982
983 if (!usbtouch->type->max_xc) {
984 usbtouch->type->max_xc = 2 * x_len;
985 input_set_abs_params(usbtouch->input, ABS_X,
986 0, usbtouch->type->max_xc, 0, 0);
987 usbtouch->type->max_yc = 2 * y_len;
988 input_set_abs_params(usbtouch->input, ABS_Y,
989 0, usbtouch->type->max_yc, 0, 0);
990 }
991 /*
992 * The device reports state of IR sensors on X and Y axes.
993 * Each byte represents "darkness" percentage (0-100) of one element.
994 * 17" touchscreen reports only 64 x 52 bytes so the resolution is low.
995 * This also means that there's a limited multi-touch capability but
996 * it's disabled (and untested) here as there's no X driver for that.
997 */
998 begin_x = end_x = begin_y = end_y = -1;
999 for (x = 0; x < x_len; x++) {
1000 if (begin_x == -1 && packet->data[x] > NEXIO_THRESHOLD) {
1001 begin_x = x;
1002 continue;
1003 }
1004 if (end_x == -1 && begin_x != -1 && packet->data[x] < NEXIO_THRESHOLD) {
1005 end_x = x - 1;
1006 for (y = x_len; y < data_len; y++) {
1007 if (begin_y == -1 && packet->data[y] > NEXIO_THRESHOLD) {
1008 begin_y = y - x_len;
1009 continue;
1010 }
1011 if (end_y == -1 &&
1012 begin_y != -1 && packet->data[y] < NEXIO_THRESHOLD) {
1013 end_y = y - 1 - x_len;
1014 w = end_x - begin_x;
1015 h = end_y - begin_y;
1016 #if 0
1017 /* multi-touch */
1018 input_report_abs(usbtouch->input,
1019 ABS_MT_TOUCH_MAJOR, max(w,h));
1020 input_report_abs(usbtouch->input,
1021 ABS_MT_TOUCH_MINOR, min(x,h));
1022 input_report_abs(usbtouch->input,
1023 ABS_MT_POSITION_X, 2*begin_x+w);
1024 input_report_abs(usbtouch->input,
1025 ABS_MT_POSITION_Y, 2*begin_y+h);
1026 input_report_abs(usbtouch->input,
1027 ABS_MT_ORIENTATION, w > h);
1028 input_mt_sync(usbtouch->input);
1029 #endif
1030 /* single touch */
1031 usbtouch->x = 2 * begin_x + w;
1032 usbtouch->y = 2 * begin_y + h;
1033 usbtouch->touch = packet->flags & 0x01;
1034 begin_y = end_y = -1;
1035 return 1;
1036 }
1037 }
1038 begin_x = end_x = -1;
1039 }
1040
1041 }
1042 return 0;
1043 }
1044 #endif
1045
1046
1047 /*****************************************************************************
1048 * ELO part
1049 */
1050
1051 #ifdef CONFIG_TOUCHSCREEN_USB_ELO
1052
1053 static int elo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
1054 {
1055 dev->x = (pkt[3] << 8) | pkt[2];
1056 dev->y = (pkt[5] << 8) | pkt[4];
1057 dev->touch = pkt[6] > 0;
1058 dev->press = pkt[6];
1059
1060 return 1;
1061 }
1062 #endif
1063
1064
1065 /*****************************************************************************
1066 * the different device descriptors
1067 */
1068 #ifdef MULTI_PACKET
1069 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1070 unsigned char *pkt, int len);
1071 #endif
1072
1073 static struct usbtouch_device_info usbtouch_dev_info[] = {
1074 #ifdef CONFIG_TOUCHSCREEN_USB_ELO
1075 [DEVTYPE_ELO] = {
1076 .min_xc = 0x0,
1077 .max_xc = 0x0fff,
1078 .min_yc = 0x0,
1079 .max_yc = 0x0fff,
1080 .max_press = 0xff,
1081 .rept_size = 8,
1082 .read_data = elo_read_data,
1083 },
1084 #endif
1085
1086 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
1087 [DEVTYPE_EGALAX] = {
1088 .min_xc = 0x0,
1089 .max_xc = 0x07ff,
1090 .min_yc = 0x0,
1091 .max_yc = 0x07ff,
1092 .rept_size = 16,
1093 .process_pkt = usbtouch_process_multi,
1094 .get_pkt_len = egalax_get_pkt_len,
1095 .read_data = egalax_read_data,
1096 .init = egalax_init,
1097 },
1098 #endif
1099
1100 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
1101 [DEVTYPE_PANJIT] = {
1102 .min_xc = 0x0,
1103 .max_xc = 0x0fff,
1104 .min_yc = 0x0,
1105 .max_yc = 0x0fff,
1106 .rept_size = 8,
1107 .read_data = panjit_read_data,
1108 },
1109 #endif
1110
1111 #ifdef CONFIG_TOUCHSCREEN_USB_3M
1112 [DEVTYPE_3M] = {
1113 .min_xc = 0x0,
1114 .max_xc = 0x4000,
1115 .min_yc = 0x0,
1116 .max_yc = 0x4000,
1117 .rept_size = 11,
1118 .read_data = mtouch_read_data,
1119 .init = mtouch_init,
1120 },
1121 #endif
1122
1123 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
1124 [DEVTYPE_ITM] = {
1125 .min_xc = 0x0,
1126 .max_xc = 0x0fff,
1127 .min_yc = 0x0,
1128 .max_yc = 0x0fff,
1129 .max_press = 0xff,
1130 .rept_size = 8,
1131 .read_data = itm_read_data,
1132 },
1133 #endif
1134
1135 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
1136 [DEVTYPE_ETURBO] = {
1137 .min_xc = 0x0,
1138 .max_xc = 0x07ff,
1139 .min_yc = 0x0,
1140 .max_yc = 0x07ff,
1141 .rept_size = 8,
1142 .process_pkt = usbtouch_process_multi,
1143 .get_pkt_len = eturbo_get_pkt_len,
1144 .read_data = eturbo_read_data,
1145 },
1146 #endif
1147
1148 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
1149 [DEVTYPE_GUNZE] = {
1150 .min_xc = 0x0,
1151 .max_xc = 0x0fff,
1152 .min_yc = 0x0,
1153 .max_yc = 0x0fff,
1154 .rept_size = 4,
1155 .read_data = gunze_read_data,
1156 },
1157 #endif
1158
1159 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
1160 [DEVTYPE_DMC_TSC10] = {
1161 .min_xc = 0x0,
1162 .max_xc = 0x03ff,
1163 .min_yc = 0x0,
1164 .max_yc = 0x03ff,
1165 .rept_size = 5,
1166 .init = dmc_tsc10_init,
1167 .read_data = dmc_tsc10_read_data,
1168 },
1169 #endif
1170
1171 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
1172 [DEVTYPE_IRTOUCH] = {
1173 .min_xc = 0x0,
1174 .max_xc = 0x0fff,
1175 .min_yc = 0x0,
1176 .max_yc = 0x0fff,
1177 .rept_size = 8,
1178 .read_data = irtouch_read_data,
1179 },
1180
1181 [DEVTYPE_IRTOUCH_HIRES] = {
1182 .min_xc = 0x0,
1183 .max_xc = 0x7fff,
1184 .min_yc = 0x0,
1185 .max_yc = 0x7fff,
1186 .rept_size = 8,
1187 .read_data = irtouch_read_data,
1188 },
1189 #endif
1190
1191 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
1192 [DEVTYPE_IDEALTEK] = {
1193 .min_xc = 0x0,
1194 .max_xc = 0x0fff,
1195 .min_yc = 0x0,
1196 .max_yc = 0x0fff,
1197 .rept_size = 8,
1198 .process_pkt = usbtouch_process_multi,
1199 .get_pkt_len = idealtek_get_pkt_len,
1200 .read_data = idealtek_read_data,
1201 },
1202 #endif
1203
1204 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
1205 [DEVTYPE_GENERAL_TOUCH] = {
1206 .min_xc = 0x0,
1207 .max_xc = 0x7fff,
1208 .min_yc = 0x0,
1209 .max_yc = 0x7fff,
1210 .rept_size = 7,
1211 .read_data = general_touch_read_data,
1212 },
1213 #endif
1214
1215 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
1216 [DEVTYPE_GOTOP] = {
1217 .min_xc = 0x0,
1218 .max_xc = 0x03ff,
1219 .min_yc = 0x0,
1220 .max_yc = 0x03ff,
1221 .rept_size = 4,
1222 .read_data = gotop_read_data,
1223 },
1224 #endif
1225
1226 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
1227 [DEVTYPE_JASTEC] = {
1228 .min_xc = 0x0,
1229 .max_xc = 0x0fff,
1230 .min_yc = 0x0,
1231 .max_yc = 0x0fff,
1232 .rept_size = 4,
1233 .read_data = jastec_read_data,
1234 },
1235 #endif
1236
1237 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
1238 [DEVTYPE_E2I] = {
1239 .min_xc = 0x0,
1240 .max_xc = 0x7fff,
1241 .min_yc = 0x0,
1242 .max_yc = 0x7fff,
1243 .rept_size = 6,
1244 .init = e2i_init,
1245 .read_data = e2i_read_data,
1246 },
1247 #endif
1248
1249 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
1250 [DEVTYPE_ZYTRONIC] = {
1251 .min_xc = 0x0,
1252 .max_xc = 0x03ff,
1253 .min_yc = 0x0,
1254 .max_yc = 0x03ff,
1255 .rept_size = 5,
1256 .read_data = zytronic_read_data,
1257 .irq_always = true,
1258 },
1259 #endif
1260
1261 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
1262 [DEVTYPE_TC45USB] = {
1263 .min_xc = 0x0,
1264 .max_xc = 0x0fff,
1265 .min_yc = 0x0,
1266 .max_yc = 0x0fff,
1267 .rept_size = 5,
1268 .read_data = tc45usb_read_data,
1269 },
1270 #endif
1271
1272 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
1273 [DEVTYPE_NEXIO] = {
1274 .rept_size = 1024,
1275 .irq_always = true,
1276 .read_data = nexio_read_data,
1277 .alloc = nexio_alloc,
1278 .init = nexio_init,
1279 .exit = nexio_exit,
1280 },
1281 #endif
1282 #ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
1283 [DEVTYPE_ETOUCH] = {
1284 .min_xc = 0x0,
1285 .max_xc = 0x07ff,
1286 .min_yc = 0x0,
1287 .max_yc = 0x07ff,
1288 .rept_size = 16,
1289 .process_pkt = usbtouch_process_multi,
1290 .get_pkt_len = etouch_get_pkt_len,
1291 .read_data = etouch_read_data,
1292 },
1293 #endif
1294 };
1295
1296
1297 /*****************************************************************************
1298 * Generic Part
1299 */
1300 static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
1301 unsigned char *pkt, int len)
1302 {
1303 struct usbtouch_device_info *type = usbtouch->type;
1304
1305 if (!type->read_data(usbtouch, pkt))
1306 return;
1307
1308 input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch);
1309
1310 if (swap_xy) {
1311 input_report_abs(usbtouch->input, ABS_X, usbtouch->y);
1312 input_report_abs(usbtouch->input, ABS_Y, usbtouch->x);
1313 } else {
1314 input_report_abs(usbtouch->input, ABS_X, usbtouch->x);
1315 input_report_abs(usbtouch->input, ABS_Y, usbtouch->y);
1316 }
1317 if (type->max_press)
1318 input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press);
1319 input_sync(usbtouch->input);
1320 }
1321
1322
1323 #ifdef MULTI_PACKET
1324 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1325 unsigned char *pkt, int len)
1326 {
1327 unsigned char *buffer;
1328 int pkt_len, pos, buf_len, tmp;
1329
1330 /* process buffer */
1331 if (unlikely(usbtouch->buf_len)) {
1332 /* try to get size */
1333 pkt_len = usbtouch->type->get_pkt_len(
1334 usbtouch->buffer, usbtouch->buf_len);
1335
1336 /* drop? */
1337 if (unlikely(!pkt_len))
1338 goto out_flush_buf;
1339
1340 /* need to append -pkt_len bytes before able to get size */
1341 if (unlikely(pkt_len < 0)) {
1342 int append = -pkt_len;
1343 if (unlikely(append > len))
1344 append = len;
1345 if (usbtouch->buf_len + append >= usbtouch->type->rept_size)
1346 goto out_flush_buf;
1347 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append);
1348 usbtouch->buf_len += append;
1349
1350 pkt_len = usbtouch->type->get_pkt_len(
1351 usbtouch->buffer, usbtouch->buf_len);
1352 if (pkt_len < 0)
1353 return;
1354 }
1355
1356 /* append */
1357 tmp = pkt_len - usbtouch->buf_len;
1358 if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size)
1359 goto out_flush_buf;
1360 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp);
1361 usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len);
1362
1363 buffer = pkt + tmp;
1364 buf_len = len - tmp;
1365 } else {
1366 buffer = pkt;
1367 buf_len = len;
1368 }
1369
1370 /* loop over the received packet, process */
1371 pos = 0;
1372 while (pos < buf_len) {
1373 /* get packet len */
1374 pkt_len = usbtouch->type->get_pkt_len(buffer + pos,
1375 buf_len - pos);
1376
1377 /* unknown packet: skip one byte */
1378 if (unlikely(!pkt_len)) {
1379 pos++;
1380 continue;
1381 }
1382
1383 /* full packet: process */
1384 if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) {
1385 usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len);
1386 } else {
1387 /* incomplete packet: save in buffer */
1388 memcpy(usbtouch->buffer, buffer + pos, buf_len - pos);
1389 usbtouch->buf_len = buf_len - pos;
1390 return;
1391 }
1392 pos += pkt_len;
1393 }
1394
1395 out_flush_buf:
1396 usbtouch->buf_len = 0;
1397 return;
1398 }
1399 #endif
1400
1401
1402 static void usbtouch_irq(struct urb *urb)
1403 {
1404 struct usbtouch_usb *usbtouch = urb->context;
1405 struct device *dev = &usbtouch->interface->dev;
1406 int retval;
1407
1408 switch (urb->status) {
1409 case 0:
1410 /* success */
1411 break;
1412 case -ETIME:
1413 /* this urb is timing out */
1414 dev_dbg(dev,
1415 "%s - urb timed out - was the device unplugged?\n",
1416 __func__);
1417 return;
1418 case -ECONNRESET:
1419 case -ENOENT:
1420 case -ESHUTDOWN:
1421 case -EPIPE:
1422 /* this urb is terminated, clean up */
1423 dev_dbg(dev, "%s - urb shutting down with status: %d\n",
1424 __func__, urb->status);
1425 return;
1426 default:
1427 dev_dbg(dev, "%s - nonzero urb status received: %d\n",
1428 __func__, urb->status);
1429 goto exit;
1430 }
1431
1432 usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length);
1433
1434 exit:
1435 usb_mark_last_busy(interface_to_usbdev(usbtouch->interface));
1436 retval = usb_submit_urb(urb, GFP_ATOMIC);
1437 if (retval)
1438 dev_err(dev, "%s - usb_submit_urb failed with result: %d\n",
1439 __func__, retval);
1440 }
1441
1442 static int usbtouch_open(struct input_dev *input)
1443 {
1444 struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1445 int r;
1446
1447 usbtouch->irq->dev = interface_to_usbdev(usbtouch->interface);
1448
1449 r = usb_autopm_get_interface(usbtouch->interface) ? -EIO : 0;
1450 if (r < 0)
1451 goto out;
1452
1453 if (!usbtouch->type->irq_always) {
1454 if (usb_submit_urb(usbtouch->irq, GFP_KERNEL)) {
1455 r = -EIO;
1456 goto out_put;
1457 }
1458 }
1459
1460 usbtouch->interface->needs_remote_wakeup = 1;
1461 out_put:
1462 usb_autopm_put_interface(usbtouch->interface);
1463 out:
1464 return r;
1465 }
1466
1467 static void usbtouch_close(struct input_dev *input)
1468 {
1469 struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1470 int r;
1471
1472 if (!usbtouch->type->irq_always)
1473 usb_kill_urb(usbtouch->irq);
1474 r = usb_autopm_get_interface(usbtouch->interface);
1475 usbtouch->interface->needs_remote_wakeup = 0;
1476 if (!r)
1477 usb_autopm_put_interface(usbtouch->interface);
1478 }
1479
1480 static int usbtouch_suspend
1481 (struct usb_interface *intf, pm_message_t message)
1482 {
1483 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1484
1485 usb_kill_urb(usbtouch->irq);
1486
1487 return 0;
1488 }
1489
1490 static int usbtouch_resume(struct usb_interface *intf)
1491 {
1492 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1493 struct input_dev *input = usbtouch->input;
1494 int result = 0;
1495
1496 mutex_lock(&input->mutex);
1497 if (input->users || usbtouch->type->irq_always)
1498 result = usb_submit_urb(usbtouch->irq, GFP_NOIO);
1499 mutex_unlock(&input->mutex);
1500
1501 return result;
1502 }
1503
1504 static int usbtouch_reset_resume(struct usb_interface *intf)
1505 {
1506 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1507 struct input_dev *input = usbtouch->input;
1508 int err = 0;
1509
1510 /* reinit the device */
1511 if (usbtouch->type->init) {
1512 err = usbtouch->type->init(usbtouch);
1513 if (err) {
1514 dev_dbg(&intf->dev,
1515 "%s - type->init() failed, err: %d\n",
1516 __func__, err);
1517 return err;
1518 }
1519 }
1520
1521 /* restart IO if needed */
1522 mutex_lock(&input->mutex);
1523 if (input->users)
1524 err = usb_submit_urb(usbtouch->irq, GFP_NOIO);
1525 mutex_unlock(&input->mutex);
1526
1527 return err;
1528 }
1529
1530 static void usbtouch_free_buffers(struct usb_device *udev,
1531 struct usbtouch_usb *usbtouch)
1532 {
1533 usb_free_coherent(udev, usbtouch->data_size,
1534 usbtouch->data, usbtouch->data_dma);
1535 kfree(usbtouch->buffer);
1536 }
1537
1538 static struct usb_endpoint_descriptor *
1539 usbtouch_get_input_endpoint(struct usb_host_interface *interface)
1540 {
1541 int i;
1542
1543 for (i = 0; i < interface->desc.bNumEndpoints; i++)
1544 if (usb_endpoint_dir_in(&interface->endpoint[i].desc))
1545 return &interface->endpoint[i].desc;
1546
1547 return NULL;
1548 }
1549
1550 static int usbtouch_probe(struct usb_interface *intf,
1551 const struct usb_device_id *id)
1552 {
1553 struct usbtouch_usb *usbtouch;
1554 struct input_dev *input_dev;
1555 struct usb_endpoint_descriptor *endpoint;
1556 struct usb_device *udev = interface_to_usbdev(intf);
1557 struct usbtouch_device_info *type;
1558 int err = -ENOMEM;
1559
1560 /* some devices are ignored */
1561 if (id->driver_info == DEVTYPE_IGNORE)
1562 return -ENODEV;
1563
1564 endpoint = usbtouch_get_input_endpoint(intf->cur_altsetting);
1565 if (!endpoint)
1566 return -ENXIO;
1567
1568 usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL);
1569 input_dev = input_allocate_device();
1570 if (!usbtouch || !input_dev)
1571 goto out_free;
1572
1573 type = &usbtouch_dev_info[id->driver_info];
1574 usbtouch->type = type;
1575 if (!type->process_pkt)
1576 type->process_pkt = usbtouch_process_pkt;
1577
1578 usbtouch->data_size = type->rept_size;
1579 if (type->get_pkt_len) {
1580 /*
1581 * When dealing with variable-length packets we should
1582 * not request more than wMaxPacketSize bytes at once
1583 * as we do not know if there is more data coming or
1584 * we filled exactly wMaxPacketSize bytes and there is
1585 * nothing else.
1586 */
1587 usbtouch->data_size = min(usbtouch->data_size,
1588 usb_endpoint_maxp(endpoint));
1589 }
1590
1591 usbtouch->data = usb_alloc_coherent(udev, usbtouch->data_size,
1592 GFP_KERNEL, &usbtouch->data_dma);
1593 if (!usbtouch->data)
1594 goto out_free;
1595
1596 if (type->get_pkt_len) {
1597 usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL);
1598 if (!usbtouch->buffer)
1599 goto out_free_buffers;
1600 }
1601
1602 usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
1603 if (!usbtouch->irq) {
1604 dev_dbg(&intf->dev,
1605 "%s - usb_alloc_urb failed: usbtouch->irq\n", __func__);
1606 goto out_free_buffers;
1607 }
1608
1609 usbtouch->interface = intf;
1610 usbtouch->input = input_dev;
1611
1612 if (udev->manufacturer)
1613 strlcpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name));
1614
1615 if (udev->product) {
1616 if (udev->manufacturer)
1617 strlcat(usbtouch->name, " ", sizeof(usbtouch->name));
1618 strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name));
1619 }
1620
1621 if (!strlen(usbtouch->name))
1622 snprintf(usbtouch->name, sizeof(usbtouch->name),
1623 "USB Touchscreen %04x:%04x",
1624 le16_to_cpu(udev->descriptor.idVendor),
1625 le16_to_cpu(udev->descriptor.idProduct));
1626
1627 usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys));
1628 strlcat(usbtouch->phys, "/input0", sizeof(usbtouch->phys));
1629
1630 input_dev->name = usbtouch->name;
1631 input_dev->phys = usbtouch->phys;
1632 usb_to_input_id(udev, &input_dev->id);
1633 input_dev->dev.parent = &intf->dev;
1634
1635 input_set_drvdata(input_dev, usbtouch);
1636
1637 input_dev->open = usbtouch_open;
1638 input_dev->close = usbtouch_close;
1639
1640 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
1641 input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
1642 input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0);
1643 input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0);
1644 if (type->max_press)
1645 input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press,
1646 type->max_press, 0, 0);
1647
1648 if (usb_endpoint_type(endpoint) == USB_ENDPOINT_XFER_INT)
1649 usb_fill_int_urb(usbtouch->irq, udev,
1650 usb_rcvintpipe(udev, endpoint->bEndpointAddress),
1651 usbtouch->data, usbtouch->data_size,
1652 usbtouch_irq, usbtouch, endpoint->bInterval);
1653 else
1654 usb_fill_bulk_urb(usbtouch->irq, udev,
1655 usb_rcvbulkpipe(udev, endpoint->bEndpointAddress),
1656 usbtouch->data, usbtouch->data_size,
1657 usbtouch_irq, usbtouch);
1658
1659 usbtouch->irq->dev = udev;
1660 usbtouch->irq->transfer_dma = usbtouch->data_dma;
1661 usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1662
1663 /* device specific allocations */
1664 if (type->alloc) {
1665 err = type->alloc(usbtouch);
1666 if (err) {
1667 dev_dbg(&intf->dev,
1668 "%s - type->alloc() failed, err: %d\n",
1669 __func__, err);
1670 goto out_free_urb;
1671 }
1672 }
1673
1674 /* device specific initialisation*/
1675 if (type->init) {
1676 err = type->init(usbtouch);
1677 if (err) {
1678 dev_dbg(&intf->dev,
1679 "%s - type->init() failed, err: %d\n",
1680 __func__, err);
1681 goto out_do_exit;
1682 }
1683 }
1684
1685 err = input_register_device(usbtouch->input);
1686 if (err) {
1687 dev_dbg(&intf->dev,
1688 "%s - input_register_device failed, err: %d\n",
1689 __func__, err);
1690 goto out_do_exit;
1691 }
1692
1693 usb_set_intfdata(intf, usbtouch);
1694
1695 if (usbtouch->type->irq_always) {
1696 /* this can't fail */
1697 usb_autopm_get_interface(intf);
1698 err = usb_submit_urb(usbtouch->irq, GFP_KERNEL);
1699 if (err) {
1700 usb_autopm_put_interface(intf);
1701 dev_err(&intf->dev,
1702 "%s - usb_submit_urb failed with result: %d\n",
1703 __func__, err);
1704 goto out_unregister_input;
1705 }
1706 }
1707
1708 return 0;
1709
1710 out_unregister_input:
1711 input_unregister_device(input_dev);
1712 input_dev = NULL;
1713 out_do_exit:
1714 if (type->exit)
1715 type->exit(usbtouch);
1716 out_free_urb:
1717 usb_free_urb(usbtouch->irq);
1718 out_free_buffers:
1719 usbtouch_free_buffers(udev, usbtouch);
1720 out_free:
1721 input_free_device(input_dev);
1722 kfree(usbtouch);
1723 return err;
1724 }
1725
1726 static void usbtouch_disconnect(struct usb_interface *intf)
1727 {
1728 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1729
1730 if (!usbtouch)
1731 return;
1732
1733 dev_dbg(&intf->dev,
1734 "%s - usbtouch is initialized, cleaning up\n", __func__);
1735
1736 usb_set_intfdata(intf, NULL);
1737 /* this will stop IO via close */
1738 input_unregister_device(usbtouch->input);
1739 usb_free_urb(usbtouch->irq);
1740 if (usbtouch->type->exit)
1741 usbtouch->type->exit(usbtouch);
1742 usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch);
1743 kfree(usbtouch);
1744 }
1745
1746 MODULE_DEVICE_TABLE(usb, usbtouch_devices);
1747
1748 static struct usb_driver usbtouch_driver = {
1749 .name = "usbtouchscreen",
1750 .probe = usbtouch_probe,
1751 .disconnect = usbtouch_disconnect,
1752 .suspend = usbtouch_suspend,
1753 .resume = usbtouch_resume,
1754 .reset_resume = usbtouch_reset_resume,
1755 .id_table = usbtouch_devices,
1756 .supports_autosuspend = 1,
1757 };
1758
1759 module_usb_driver(usbtouch_driver);
1760
1761 MODULE_AUTHOR("Daniel Ritz <daniel.ritz@gmx.ch>");
1762 MODULE_DESCRIPTION("USB Touchscreen Driver");
1763 MODULE_LICENSE("GPL");
1764
1765 MODULE_ALIAS("touchkitusb");
1766 MODULE_ALIAS("itmtouch");
1767 MODULE_ALIAS("mtouchusb");
CRIS linux kernel tree