Loading...
1/******************************************************************************
2 * usbtouchscreen.c
3 * Driver for USB Touchscreens, supporting those devices:
4 * - eGalax Touchkit
5 * includes eTurboTouch CT-410/510/700
6 * - 3M/Microtouch EX II series
7 * - ITM
8 * - PanJit TouchSet
9 * - eTurboTouch
10 * - Gunze AHL61
11 * - DMC TSC-10/25
12 * - IRTOUCHSYSTEMS/UNITOP
13 * - IdealTEK URTC1000
14 * - General Touch
15 * - GoTop Super_Q2/GogoPen/PenPower tablets
16 * - JASTEC USB touch controller/DigiTech DTR-02U
17 * - Zytronic capacitive touchscreen
18 * - NEXIO/iNexio
19 *
20 * Copyright (C) 2004-2007 by Daniel Ritz <daniel.ritz@gmx.ch>
21 * Copyright (C) by Todd E. Johnson (mtouchusb.c)
22 *
23 * This program is free software; you can redistribute it and/or
24 * modify it under the terms of the GNU General Public License as
25 * published by the Free Software Foundation; either version 2 of the
26 * License, or (at your option) any later version.
27 *
28 * This program is distributed in the hope that it will be useful, but
29 * WITHOUT ANY WARRANTY; without even the implied warranty of
30 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
31 * General Public License for more details.
32 *
33 * You should have received a copy of the GNU General Public License
34 * along with this program; if not, write to the Free Software
35 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
36 *
37 * Driver is based on touchkitusb.c
38 * - ITM parts are from itmtouch.c
39 * - 3M parts are from mtouchusb.c
40 * - PanJit parts are from an unmerged driver by Lanslott Gish
41 * - DMC TSC 10/25 are from Holger Schurig, with ideas from an unmerged
42 * driver from Marius Vollmer
43 *
44 *****************************************************************************/
45
46//#define DEBUG
47
48#include <linux/kernel.h>
49#include <linux/slab.h>
50#include <linux/input.h>
51#include <linux/module.h>
52#include <linux/init.h>
53#include <linux/usb.h>
54#include <linux/usb/input.h>
55#include <linux/hid.h>
56
57
58#define DRIVER_VERSION "v0.6"
59#define DRIVER_AUTHOR "Daniel Ritz <daniel.ritz@gmx.ch>"
60#define DRIVER_DESC "USB Touchscreen Driver"
61
62static int swap_xy;
63module_param(swap_xy, bool, 0644);
64MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");
65
66static int hwcalib_xy;
67module_param(hwcalib_xy, bool, 0644);
68MODULE_PARM_DESC(hwcalib_xy, "If set hw-calibrated X/Y are used if available");
69
70/* device specifc data/functions */
71struct usbtouch_usb;
72struct usbtouch_device_info {
73 int min_xc, max_xc;
74 int min_yc, max_yc;
75 int min_press, max_press;
76 int rept_size;
77
78 /*
79 * Always service the USB devices irq not just when the input device is
80 * open. This is useful when devices have a watchdog which prevents us
81 * from periodically polling the device. Leave this unset unless your
82 * touchscreen device requires it, as it does consume more of the USB
83 * bandwidth.
84 */
85 bool irq_always;
86
87 void (*process_pkt) (struct usbtouch_usb *usbtouch, unsigned char *pkt, int len);
88
89 /*
90 * used to get the packet len. possible return values:
91 * > 0: packet len
92 * = 0: skip one byte
93 * < 0: -return value more bytes needed
94 */
95 int (*get_pkt_len) (unsigned char *pkt, int len);
96
97 int (*read_data) (struct usbtouch_usb *usbtouch, unsigned char *pkt);
98 int (*alloc) (struct usbtouch_usb *usbtouch);
99 int (*init) (struct usbtouch_usb *usbtouch);
100 void (*exit) (struct usbtouch_usb *usbtouch);
101};
102
103/* a usbtouch device */
104struct usbtouch_usb {
105 unsigned char *data;
106 dma_addr_t data_dma;
107 unsigned char *buffer;
108 int buf_len;
109 struct urb *irq;
110 struct usb_interface *interface;
111 struct input_dev *input;
112 struct usbtouch_device_info *type;
113 char name[128];
114 char phys[64];
115 void *priv;
116
117 int x, y;
118 int touch, press;
119};
120
121
122/* device types */
123enum {
124 DEVTYPE_IGNORE = -1,
125 DEVTYPE_EGALAX,
126 DEVTYPE_PANJIT,
127 DEVTYPE_3M,
128 DEVTYPE_ITM,
129 DEVTYPE_ETURBO,
130 DEVTYPE_GUNZE,
131 DEVTYPE_DMC_TSC10,
132 DEVTYPE_IRTOUCH,
133 DEVTYPE_IDEALTEK,
134 DEVTYPE_GENERAL_TOUCH,
135 DEVTYPE_GOTOP,
136 DEVTYPE_JASTEC,
137 DEVTYPE_E2I,
138 DEVTYPE_ZYTRONIC,
139 DEVTYPE_TC45USB,
140 DEVTYPE_NEXIO,
141};
142
143#define USB_DEVICE_HID_CLASS(vend, prod) \
144 .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS \
145 | USB_DEVICE_ID_MATCH_INT_PROTOCOL \
146 | USB_DEVICE_ID_MATCH_DEVICE, \
147 .idVendor = (vend), \
148 .idProduct = (prod), \
149 .bInterfaceClass = USB_INTERFACE_CLASS_HID, \
150 .bInterfaceProtocol = USB_INTERFACE_PROTOCOL_MOUSE
151
152static const struct usb_device_id usbtouch_devices[] = {
153#ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
154 /* ignore the HID capable devices, handled by usbhid */
155 {USB_DEVICE_HID_CLASS(0x0eef, 0x0001), .driver_info = DEVTYPE_IGNORE},
156 {USB_DEVICE_HID_CLASS(0x0eef, 0x0002), .driver_info = DEVTYPE_IGNORE},
157
158 /* normal device IDs */
159 {USB_DEVICE(0x3823, 0x0001), .driver_info = DEVTYPE_EGALAX},
160 {USB_DEVICE(0x3823, 0x0002), .driver_info = DEVTYPE_EGALAX},
161 {USB_DEVICE(0x0123, 0x0001), .driver_info = DEVTYPE_EGALAX},
162 {USB_DEVICE(0x0eef, 0x0001), .driver_info = DEVTYPE_EGALAX},
163 {USB_DEVICE(0x0eef, 0x0002), .driver_info = DEVTYPE_EGALAX},
164 {USB_DEVICE(0x1234, 0x0001), .driver_info = DEVTYPE_EGALAX},
165 {USB_DEVICE(0x1234, 0x0002), .driver_info = DEVTYPE_EGALAX},
166#endif
167
168#ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
169 {USB_DEVICE(0x134c, 0x0001), .driver_info = DEVTYPE_PANJIT},
170 {USB_DEVICE(0x134c, 0x0002), .driver_info = DEVTYPE_PANJIT},
171 {USB_DEVICE(0x134c, 0x0003), .driver_info = DEVTYPE_PANJIT},
172 {USB_DEVICE(0x134c, 0x0004), .driver_info = DEVTYPE_PANJIT},
173#endif
174
175#ifdef CONFIG_TOUCHSCREEN_USB_3M
176 {USB_DEVICE(0x0596, 0x0001), .driver_info = DEVTYPE_3M},
177#endif
178
179#ifdef CONFIG_TOUCHSCREEN_USB_ITM
180 {USB_DEVICE(0x0403, 0xf9e9), .driver_info = DEVTYPE_ITM},
181 {USB_DEVICE(0x16e3, 0xf9e9), .driver_info = DEVTYPE_ITM},
182#endif
183
184#ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
185 {USB_DEVICE(0x1234, 0x5678), .driver_info = DEVTYPE_ETURBO},
186#endif
187
188#ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
189 {USB_DEVICE(0x0637, 0x0001), .driver_info = DEVTYPE_GUNZE},
190#endif
191
192#ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
193 {USB_DEVICE(0x0afa, 0x03e8), .driver_info = DEVTYPE_DMC_TSC10},
194#endif
195
196#ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
197 {USB_DEVICE(0x595a, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
198 {USB_DEVICE(0x6615, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
199#endif
200
201#ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
202 {USB_DEVICE(0x1391, 0x1000), .driver_info = DEVTYPE_IDEALTEK},
203#endif
204
205#ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
206 {USB_DEVICE(0x0dfc, 0x0001), .driver_info = DEVTYPE_GENERAL_TOUCH},
207#endif
208
209#ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
210 {USB_DEVICE(0x08f2, 0x007f), .driver_info = DEVTYPE_GOTOP},
211 {USB_DEVICE(0x08f2, 0x00ce), .driver_info = DEVTYPE_GOTOP},
212 {USB_DEVICE(0x08f2, 0x00f4), .driver_info = DEVTYPE_GOTOP},
213#endif
214
215#ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
216 {USB_DEVICE(0x0f92, 0x0001), .driver_info = DEVTYPE_JASTEC},
217#endif
218
219#ifdef CONFIG_TOUCHSCREEN_USB_E2I
220 {USB_DEVICE(0x1ac7, 0x0001), .driver_info = DEVTYPE_E2I},
221#endif
222
223#ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
224 {USB_DEVICE(0x14c8, 0x0003), .driver_info = DEVTYPE_ZYTRONIC},
225#endif
226
227#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
228 /* TC5UH */
229 {USB_DEVICE(0x0664, 0x0309), .driver_info = DEVTYPE_TC45USB},
230 /* TC4UM */
231 {USB_DEVICE(0x0664, 0x0306), .driver_info = DEVTYPE_TC45USB},
232#endif
233
234#ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
235 /* data interface only */
236 {USB_DEVICE_AND_INTERFACE_INFO(0x10f0, 0x2002, 0x0a, 0x00, 0x00),
237 .driver_info = DEVTYPE_NEXIO},
238 {USB_DEVICE_AND_INTERFACE_INFO(0x1870, 0x0001, 0x0a, 0x00, 0x00),
239 .driver_info = DEVTYPE_NEXIO},
240#endif
241
242 {}
243};
244
245
246/*****************************************************************************
247 * e2i Part
248 */
249
250#ifdef CONFIG_TOUCHSCREEN_USB_E2I
251static int e2i_init(struct usbtouch_usb *usbtouch)
252{
253 int ret;
254 struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
255
256 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
257 0x01, 0x02, 0x0000, 0x0081,
258 NULL, 0, USB_CTRL_SET_TIMEOUT);
259
260 dbg("%s - usb_control_msg - E2I_RESET - bytes|err: %d",
261 __func__, ret);
262 return ret;
263}
264
265static int e2i_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
266{
267 int tmp = (pkt[0] << 8) | pkt[1];
268 dev->x = (pkt[2] << 8) | pkt[3];
269 dev->y = (pkt[4] << 8) | pkt[5];
270
271 tmp = tmp - 0xA000;
272 dev->touch = (tmp > 0);
273 dev->press = (tmp > 0 ? tmp : 0);
274
275 return 1;
276}
277#endif
278
279
280/*****************************************************************************
281 * eGalax part
282 */
283
284#ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
285
286#ifndef MULTI_PACKET
287#define MULTI_PACKET
288#endif
289
290#define EGALAX_PKT_TYPE_MASK 0xFE
291#define EGALAX_PKT_TYPE_REPT 0x80
292#define EGALAX_PKT_TYPE_DIAG 0x0A
293
294static int egalax_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
295{
296 if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT)
297 return 0;
298
299 dev->x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F);
300 dev->y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F);
301 dev->touch = pkt[0] & 0x01;
302
303 return 1;
304}
305
306static int egalax_get_pkt_len(unsigned char *buf, int len)
307{
308 switch (buf[0] & EGALAX_PKT_TYPE_MASK) {
309 case EGALAX_PKT_TYPE_REPT:
310 return 5;
311
312 case EGALAX_PKT_TYPE_DIAG:
313 if (len < 2)
314 return -1;
315
316 return buf[1] + 2;
317 }
318
319 return 0;
320}
321#endif
322
323
324/*****************************************************************************
325 * PanJit Part
326 */
327#ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
328static int panjit_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
329{
330 dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
331 dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
332 dev->touch = pkt[0] & 0x01;
333
334 return 1;
335}
336#endif
337
338
339/*****************************************************************************
340 * 3M/Microtouch Part
341 */
342#ifdef CONFIG_TOUCHSCREEN_USB_3M
343
344#define MTOUCHUSB_ASYNC_REPORT 1
345#define MTOUCHUSB_RESET 7
346#define MTOUCHUSB_REQ_CTRLLR_ID 10
347
348static int mtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
349{
350 if (hwcalib_xy) {
351 dev->x = (pkt[4] << 8) | pkt[3];
352 dev->y = 0xffff - ((pkt[6] << 8) | pkt[5]);
353 } else {
354 dev->x = (pkt[8] << 8) | pkt[7];
355 dev->y = (pkt[10] << 8) | pkt[9];
356 }
357 dev->touch = (pkt[2] & 0x40) ? 1 : 0;
358
359 return 1;
360}
361
362static int mtouch_init(struct usbtouch_usb *usbtouch)
363{
364 int ret, i;
365 struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
366
367 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
368 MTOUCHUSB_RESET,
369 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
370 1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
371 dbg("%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d",
372 __func__, ret);
373 if (ret < 0)
374 return ret;
375 msleep(150);
376
377 for (i = 0; i < 3; i++) {
378 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
379 MTOUCHUSB_ASYNC_REPORT,
380 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
381 1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT);
382 dbg("%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d",
383 __func__, ret);
384 if (ret >= 0)
385 break;
386 if (ret != -EPIPE)
387 return ret;
388 }
389
390 /* Default min/max xy are the raw values, override if using hw-calib */
391 if (hwcalib_xy) {
392 input_set_abs_params(usbtouch->input, ABS_X, 0, 0xffff, 0, 0);
393 input_set_abs_params(usbtouch->input, ABS_Y, 0, 0xffff, 0, 0);
394 }
395
396 return 0;
397}
398#endif
399
400
401/*****************************************************************************
402 * ITM Part
403 */
404#ifdef CONFIG_TOUCHSCREEN_USB_ITM
405static int itm_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
406{
407 int touch;
408 /*
409 * ITM devices report invalid x/y data if not touched.
410 * if the screen was touched before but is not touched any more
411 * report touch as 0 with the last valid x/y data once. then stop
412 * reporting data until touched again.
413 */
414 dev->press = ((pkt[2] & 0x01) << 7) | (pkt[5] & 0x7F);
415
416 touch = ~pkt[7] & 0x20;
417 if (!touch) {
418 if (dev->touch) {
419 dev->touch = 0;
420 return 1;
421 }
422
423 return 0;
424 }
425
426 dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F);
427 dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F);
428 dev->touch = touch;
429
430 return 1;
431}
432#endif
433
434
435/*****************************************************************************
436 * eTurboTouch part
437 */
438#ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
439#ifndef MULTI_PACKET
440#define MULTI_PACKET
441#endif
442static int eturbo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
443{
444 unsigned int shift;
445
446 /* packets should start with sync */
447 if (!(pkt[0] & 0x80))
448 return 0;
449
450 shift = (6 - (pkt[0] & 0x03));
451 dev->x = ((pkt[3] << 7) | pkt[4]) >> shift;
452 dev->y = ((pkt[1] << 7) | pkt[2]) >> shift;
453 dev->touch = (pkt[0] & 0x10) ? 1 : 0;
454
455 return 1;
456}
457
458static int eturbo_get_pkt_len(unsigned char *buf, int len)
459{
460 if (buf[0] & 0x80)
461 return 5;
462 if (buf[0] == 0x01)
463 return 3;
464 return 0;
465}
466#endif
467
468
469/*****************************************************************************
470 * Gunze part
471 */
472#ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
473static int gunze_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
474{
475 if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80))
476 return 0;
477
478 dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F);
479 dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F);
480 dev->touch = pkt[0] & 0x20;
481
482 return 1;
483}
484#endif
485
486/*****************************************************************************
487 * DMC TSC-10/25 Part
488 *
489 * Documentation about the controller and it's protocol can be found at
490 * http://www.dmccoltd.com/files/controler/tsc10usb_pi_e.pdf
491 * http://www.dmccoltd.com/files/controler/tsc25_usb_e.pdf
492 */
493#ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
494
495/* supported data rates. currently using 130 */
496#define TSC10_RATE_POINT 0x50
497#define TSC10_RATE_30 0x40
498#define TSC10_RATE_50 0x41
499#define TSC10_RATE_80 0x42
500#define TSC10_RATE_100 0x43
501#define TSC10_RATE_130 0x44
502#define TSC10_RATE_150 0x45
503
504/* commands */
505#define TSC10_CMD_RESET 0x55
506#define TSC10_CMD_RATE 0x05
507#define TSC10_CMD_DATA1 0x01
508
509static int dmc_tsc10_init(struct usbtouch_usb *usbtouch)
510{
511 struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
512 int ret = -ENOMEM;
513 unsigned char *buf;
514
515 buf = kmalloc(2, GFP_NOIO);
516 if (!buf)
517 goto err_nobuf;
518 /* reset */
519 buf[0] = buf[1] = 0xFF;
520 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
521 TSC10_CMD_RESET,
522 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
523 0, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
524 if (ret < 0)
525 goto err_out;
526 if (buf[0] != 0x06) {
527 ret = -ENODEV;
528 goto err_out;
529 }
530
531 /* set coordinate output rate */
532 buf[0] = buf[1] = 0xFF;
533 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
534 TSC10_CMD_RATE,
535 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
536 TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
537 if (ret < 0)
538 goto err_out;
539 if ((buf[0] != 0x06) && (buf[0] != 0x15 || buf[1] != 0x01)) {
540 ret = -ENODEV;
541 goto err_out;
542 }
543
544 /* start sending data */
545 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
546 TSC10_CMD_DATA1,
547 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
548 0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
549err_out:
550 kfree(buf);
551err_nobuf:
552 return ret;
553}
554
555
556static int dmc_tsc10_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
557{
558 dev->x = ((pkt[2] & 0x03) << 8) | pkt[1];
559 dev->y = ((pkt[4] & 0x03) << 8) | pkt[3];
560 dev->touch = pkt[0] & 0x01;
561
562 return 1;
563}
564#endif
565
566
567/*****************************************************************************
568 * IRTOUCH Part
569 */
570#ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
571static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
572{
573 dev->x = (pkt[3] << 8) | pkt[2];
574 dev->y = (pkt[5] << 8) | pkt[4];
575 dev->touch = (pkt[1] & 0x03) ? 1 : 0;
576
577 return 1;
578}
579#endif
580
581/*****************************************************************************
582 * ET&T TC5UH/TC4UM part
583 */
584#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
585static int tc45usb_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
586{
587 dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
588 dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
589 dev->touch = pkt[0] & 0x01;
590
591 return 1;
592}
593#endif
594
595/*****************************************************************************
596 * IdealTEK URTC1000 Part
597 */
598#ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
599#ifndef MULTI_PACKET
600#define MULTI_PACKET
601#endif
602static int idealtek_get_pkt_len(unsigned char *buf, int len)
603{
604 if (buf[0] & 0x80)
605 return 5;
606 if (buf[0] == 0x01)
607 return len;
608 return 0;
609}
610
611static int idealtek_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
612{
613 switch (pkt[0] & 0x98) {
614 case 0x88:
615 /* touch data in IdealTEK mode */
616 dev->x = (pkt[1] << 5) | (pkt[2] >> 2);
617 dev->y = (pkt[3] << 5) | (pkt[4] >> 2);
618 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
619 return 1;
620
621 case 0x98:
622 /* touch data in MT emulation mode */
623 dev->x = (pkt[2] << 5) | (pkt[1] >> 2);
624 dev->y = (pkt[4] << 5) | (pkt[3] >> 2);
625 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
626 return 1;
627
628 default:
629 return 0;
630 }
631}
632#endif
633
634/*****************************************************************************
635 * General Touch Part
636 */
637#ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
638static int general_touch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
639{
640 dev->x = (pkt[2] << 8) | pkt[1];
641 dev->y = (pkt[4] << 8) | pkt[3];
642 dev->press = pkt[5] & 0xff;
643 dev->touch = pkt[0] & 0x01;
644
645 return 1;
646}
647#endif
648
649/*****************************************************************************
650 * GoTop Part
651 */
652#ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
653static int gotop_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
654{
655 dev->x = ((pkt[1] & 0x38) << 4) | pkt[2];
656 dev->y = ((pkt[1] & 0x07) << 7) | pkt[3];
657 dev->touch = pkt[0] & 0x01;
658
659 return 1;
660}
661#endif
662
663/*****************************************************************************
664 * JASTEC Part
665 */
666#ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
667static int jastec_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
668{
669 dev->x = ((pkt[0] & 0x3f) << 6) | (pkt[2] & 0x3f);
670 dev->y = ((pkt[1] & 0x3f) << 6) | (pkt[3] & 0x3f);
671 dev->touch = (pkt[0] & 0x40) >> 6;
672
673 return 1;
674}
675#endif
676
677/*****************************************************************************
678 * Zytronic Part
679 */
680#ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
681static int zytronic_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
682{
683 switch (pkt[0]) {
684 case 0x3A: /* command response */
685 dbg("%s: Command response %d", __func__, pkt[1]);
686 break;
687
688 case 0xC0: /* down */
689 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
690 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
691 dev->touch = 1;
692 dbg("%s: down %d,%d", __func__, dev->x, dev->y);
693 return 1;
694
695 case 0x80: /* up */
696 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
697 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
698 dev->touch = 0;
699 dbg("%s: up %d,%d", __func__, dev->x, dev->y);
700 return 1;
701
702 default:
703 dbg("%s: Unknown return %d", __func__, pkt[0]);
704 break;
705 }
706
707 return 0;
708}
709#endif
710
711/*****************************************************************************
712 * NEXIO Part
713 */
714#ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
715
716#define NEXIO_TIMEOUT 5000
717#define NEXIO_BUFSIZE 1024
718#define NEXIO_THRESHOLD 50
719
720struct nexio_priv {
721 struct urb *ack;
722 unsigned char *ack_buf;
723};
724
725struct nexio_touch_packet {
726 u8 flags; /* 0xe1 = touch, 0xe1 = release */
727 __be16 data_len; /* total bytes of touch data */
728 __be16 x_len; /* bytes for X axis */
729 __be16 y_len; /* bytes for Y axis */
730 u8 data[];
731} __attribute__ ((packed));
732
733static unsigned char nexio_ack_pkt[2] = { 0xaa, 0x02 };
734static unsigned char nexio_init_pkt[4] = { 0x82, 0x04, 0x0a, 0x0f };
735
736static void nexio_ack_complete(struct urb *urb)
737{
738}
739
740static int nexio_alloc(struct usbtouch_usb *usbtouch)
741{
742 struct nexio_priv *priv;
743 int ret = -ENOMEM;
744
745 usbtouch->priv = kmalloc(sizeof(struct nexio_priv), GFP_KERNEL);
746 if (!usbtouch->priv)
747 goto out_buf;
748
749 priv = usbtouch->priv;
750
751 priv->ack_buf = kmemdup(nexio_ack_pkt, sizeof(nexio_ack_pkt),
752 GFP_KERNEL);
753 if (!priv->ack_buf)
754 goto err_priv;
755
756 priv->ack = usb_alloc_urb(0, GFP_KERNEL);
757 if (!priv->ack) {
758 dbg("%s - usb_alloc_urb failed: usbtouch->ack", __func__);
759 goto err_ack_buf;
760 }
761
762 return 0;
763
764err_ack_buf:
765 kfree(priv->ack_buf);
766err_priv:
767 kfree(priv);
768out_buf:
769 return ret;
770}
771
772static int nexio_init(struct usbtouch_usb *usbtouch)
773{
774 struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
775 struct usb_host_interface *interface = usbtouch->interface->cur_altsetting;
776 struct nexio_priv *priv = usbtouch->priv;
777 int ret = -ENOMEM;
778 int actual_len, i;
779 unsigned char *buf;
780 char *firmware_ver = NULL, *device_name = NULL;
781 int input_ep = 0, output_ep = 0;
782
783 /* find first input and output endpoint */
784 for (i = 0; i < interface->desc.bNumEndpoints; i++) {
785 if (!input_ep &&
786 usb_endpoint_dir_in(&interface->endpoint[i].desc))
787 input_ep = interface->endpoint[i].desc.bEndpointAddress;
788 if (!output_ep &&
789 usb_endpoint_dir_out(&interface->endpoint[i].desc))
790 output_ep = interface->endpoint[i].desc.bEndpointAddress;
791 }
792 if (!input_ep || !output_ep)
793 return -ENXIO;
794
795 buf = kmalloc(NEXIO_BUFSIZE, GFP_NOIO);
796 if (!buf)
797 goto out_buf;
798
799 /* two empty reads */
800 for (i = 0; i < 2; i++) {
801 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
802 buf, NEXIO_BUFSIZE, &actual_len,
803 NEXIO_TIMEOUT);
804 if (ret < 0)
805 goto out_buf;
806 }
807
808 /* send init command */
809 memcpy(buf, nexio_init_pkt, sizeof(nexio_init_pkt));
810 ret = usb_bulk_msg(dev, usb_sndbulkpipe(dev, output_ep),
811 buf, sizeof(nexio_init_pkt), &actual_len,
812 NEXIO_TIMEOUT);
813 if (ret < 0)
814 goto out_buf;
815
816 /* read replies */
817 for (i = 0; i < 3; i++) {
818 memset(buf, 0, NEXIO_BUFSIZE);
819 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
820 buf, NEXIO_BUFSIZE, &actual_len,
821 NEXIO_TIMEOUT);
822 if (ret < 0 || actual_len < 1 || buf[1] != actual_len)
823 continue;
824 switch (buf[0]) {
825 case 0x83: /* firmware version */
826 if (!firmware_ver)
827 firmware_ver = kstrdup(&buf[2], GFP_NOIO);
828 break;
829 case 0x84: /* device name */
830 if (!device_name)
831 device_name = kstrdup(&buf[2], GFP_NOIO);
832 break;
833 }
834 }
835
836 printk(KERN_INFO "Nexio device: %s, firmware version: %s\n",
837 device_name, firmware_ver);
838
839 kfree(firmware_ver);
840 kfree(device_name);
841
842 usb_fill_bulk_urb(priv->ack, dev, usb_sndbulkpipe(dev, output_ep),
843 priv->ack_buf, sizeof(nexio_ack_pkt),
844 nexio_ack_complete, usbtouch);
845 ret = 0;
846
847out_buf:
848 kfree(buf);
849 return ret;
850}
851
852static void nexio_exit(struct usbtouch_usb *usbtouch)
853{
854 struct nexio_priv *priv = usbtouch->priv;
855
856 usb_kill_urb(priv->ack);
857 usb_free_urb(priv->ack);
858 kfree(priv->ack_buf);
859 kfree(priv);
860}
861
862static int nexio_read_data(struct usbtouch_usb *usbtouch, unsigned char *pkt)
863{
864 struct nexio_touch_packet *packet = (void *) pkt;
865 struct nexio_priv *priv = usbtouch->priv;
866 unsigned int data_len = be16_to_cpu(packet->data_len);
867 unsigned int x_len = be16_to_cpu(packet->x_len);
868 unsigned int y_len = be16_to_cpu(packet->y_len);
869 int x, y, begin_x, begin_y, end_x, end_y, w, h, ret;
870
871 /* got touch data? */
872 if ((pkt[0] & 0xe0) != 0xe0)
873 return 0;
874
875 if (data_len > 0xff)
876 data_len -= 0x100;
877 if (x_len > 0xff)
878 x_len -= 0x80;
879
880 /* send ACK */
881 ret = usb_submit_urb(priv->ack, GFP_ATOMIC);
882
883 if (!usbtouch->type->max_xc) {
884 usbtouch->type->max_xc = 2 * x_len;
885 input_set_abs_params(usbtouch->input, ABS_X,
886 0, usbtouch->type->max_xc, 0, 0);
887 usbtouch->type->max_yc = 2 * y_len;
888 input_set_abs_params(usbtouch->input, ABS_Y,
889 0, usbtouch->type->max_yc, 0, 0);
890 }
891 /*
892 * The device reports state of IR sensors on X and Y axes.
893 * Each byte represents "darkness" percentage (0-100) of one element.
894 * 17" touchscreen reports only 64 x 52 bytes so the resolution is low.
895 * This also means that there's a limited multi-touch capability but
896 * it's disabled (and untested) here as there's no X driver for that.
897 */
898 begin_x = end_x = begin_y = end_y = -1;
899 for (x = 0; x < x_len; x++) {
900 if (begin_x == -1 && packet->data[x] > NEXIO_THRESHOLD) {
901 begin_x = x;
902 continue;
903 }
904 if (end_x == -1 && begin_x != -1 && packet->data[x] < NEXIO_THRESHOLD) {
905 end_x = x - 1;
906 for (y = x_len; y < data_len; y++) {
907 if (begin_y == -1 && packet->data[y] > NEXIO_THRESHOLD) {
908 begin_y = y - x_len;
909 continue;
910 }
911 if (end_y == -1 &&
912 begin_y != -1 && packet->data[y] < NEXIO_THRESHOLD) {
913 end_y = y - 1 - x_len;
914 w = end_x - begin_x;
915 h = end_y - begin_y;
916#if 0
917 /* multi-touch */
918 input_report_abs(usbtouch->input,
919 ABS_MT_TOUCH_MAJOR, max(w,h));
920 input_report_abs(usbtouch->input,
921 ABS_MT_TOUCH_MINOR, min(x,h));
922 input_report_abs(usbtouch->input,
923 ABS_MT_POSITION_X, 2*begin_x+w);
924 input_report_abs(usbtouch->input,
925 ABS_MT_POSITION_Y, 2*begin_y+h);
926 input_report_abs(usbtouch->input,
927 ABS_MT_ORIENTATION, w > h);
928 input_mt_sync(usbtouch->input);
929#endif
930 /* single touch */
931 usbtouch->x = 2 * begin_x + w;
932 usbtouch->y = 2 * begin_y + h;
933 usbtouch->touch = packet->flags & 0x01;
934 begin_y = end_y = -1;
935 return 1;
936 }
937 }
938 begin_x = end_x = -1;
939 }
940
941 }
942 return 0;
943}
944#endif
945
946
947/*****************************************************************************
948 * the different device descriptors
949 */
950#ifdef MULTI_PACKET
951static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
952 unsigned char *pkt, int len);
953#endif
954
955static struct usbtouch_device_info usbtouch_dev_info[] = {
956#ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
957 [DEVTYPE_EGALAX] = {
958 .min_xc = 0x0,
959 .max_xc = 0x07ff,
960 .min_yc = 0x0,
961 .max_yc = 0x07ff,
962 .rept_size = 16,
963 .process_pkt = usbtouch_process_multi,
964 .get_pkt_len = egalax_get_pkt_len,
965 .read_data = egalax_read_data,
966 },
967#endif
968
969#ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
970 [DEVTYPE_PANJIT] = {
971 .min_xc = 0x0,
972 .max_xc = 0x0fff,
973 .min_yc = 0x0,
974 .max_yc = 0x0fff,
975 .rept_size = 8,
976 .read_data = panjit_read_data,
977 },
978#endif
979
980#ifdef CONFIG_TOUCHSCREEN_USB_3M
981 [DEVTYPE_3M] = {
982 .min_xc = 0x0,
983 .max_xc = 0x4000,
984 .min_yc = 0x0,
985 .max_yc = 0x4000,
986 .rept_size = 11,
987 .read_data = mtouch_read_data,
988 .init = mtouch_init,
989 },
990#endif
991
992#ifdef CONFIG_TOUCHSCREEN_USB_ITM
993 [DEVTYPE_ITM] = {
994 .min_xc = 0x0,
995 .max_xc = 0x0fff,
996 .min_yc = 0x0,
997 .max_yc = 0x0fff,
998 .max_press = 0xff,
999 .rept_size = 8,
1000 .read_data = itm_read_data,
1001 },
1002#endif
1003
1004#ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
1005 [DEVTYPE_ETURBO] = {
1006 .min_xc = 0x0,
1007 .max_xc = 0x07ff,
1008 .min_yc = 0x0,
1009 .max_yc = 0x07ff,
1010 .rept_size = 8,
1011 .process_pkt = usbtouch_process_multi,
1012 .get_pkt_len = eturbo_get_pkt_len,
1013 .read_data = eturbo_read_data,
1014 },
1015#endif
1016
1017#ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
1018 [DEVTYPE_GUNZE] = {
1019 .min_xc = 0x0,
1020 .max_xc = 0x0fff,
1021 .min_yc = 0x0,
1022 .max_yc = 0x0fff,
1023 .rept_size = 4,
1024 .read_data = gunze_read_data,
1025 },
1026#endif
1027
1028#ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
1029 [DEVTYPE_DMC_TSC10] = {
1030 .min_xc = 0x0,
1031 .max_xc = 0x03ff,
1032 .min_yc = 0x0,
1033 .max_yc = 0x03ff,
1034 .rept_size = 5,
1035 .init = dmc_tsc10_init,
1036 .read_data = dmc_tsc10_read_data,
1037 },
1038#endif
1039
1040#ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
1041 [DEVTYPE_IRTOUCH] = {
1042 .min_xc = 0x0,
1043 .max_xc = 0x0fff,
1044 .min_yc = 0x0,
1045 .max_yc = 0x0fff,
1046 .rept_size = 8,
1047 .read_data = irtouch_read_data,
1048 },
1049#endif
1050
1051#ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
1052 [DEVTYPE_IDEALTEK] = {
1053 .min_xc = 0x0,
1054 .max_xc = 0x0fff,
1055 .min_yc = 0x0,
1056 .max_yc = 0x0fff,
1057 .rept_size = 8,
1058 .process_pkt = usbtouch_process_multi,
1059 .get_pkt_len = idealtek_get_pkt_len,
1060 .read_data = idealtek_read_data,
1061 },
1062#endif
1063
1064#ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
1065 [DEVTYPE_GENERAL_TOUCH] = {
1066 .min_xc = 0x0,
1067 .max_xc = 0x7fff,
1068 .min_yc = 0x0,
1069 .max_yc = 0x7fff,
1070 .rept_size = 7,
1071 .read_data = general_touch_read_data,
1072 },
1073#endif
1074
1075#ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
1076 [DEVTYPE_GOTOP] = {
1077 .min_xc = 0x0,
1078 .max_xc = 0x03ff,
1079 .min_yc = 0x0,
1080 .max_yc = 0x03ff,
1081 .rept_size = 4,
1082 .read_data = gotop_read_data,
1083 },
1084#endif
1085
1086#ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
1087 [DEVTYPE_JASTEC] = {
1088 .min_xc = 0x0,
1089 .max_xc = 0x0fff,
1090 .min_yc = 0x0,
1091 .max_yc = 0x0fff,
1092 .rept_size = 4,
1093 .read_data = jastec_read_data,
1094 },
1095#endif
1096
1097#ifdef CONFIG_TOUCHSCREEN_USB_E2I
1098 [DEVTYPE_E2I] = {
1099 .min_xc = 0x0,
1100 .max_xc = 0x7fff,
1101 .min_yc = 0x0,
1102 .max_yc = 0x7fff,
1103 .rept_size = 6,
1104 .init = e2i_init,
1105 .read_data = e2i_read_data,
1106 },
1107#endif
1108
1109#ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
1110 [DEVTYPE_ZYTRONIC] = {
1111 .min_xc = 0x0,
1112 .max_xc = 0x03ff,
1113 .min_yc = 0x0,
1114 .max_yc = 0x03ff,
1115 .rept_size = 5,
1116 .read_data = zytronic_read_data,
1117 .irq_always = true,
1118 },
1119#endif
1120
1121#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
1122 [DEVTYPE_TC45USB] = {
1123 .min_xc = 0x0,
1124 .max_xc = 0x0fff,
1125 .min_yc = 0x0,
1126 .max_yc = 0x0fff,
1127 .rept_size = 5,
1128 .read_data = tc45usb_read_data,
1129 },
1130#endif
1131
1132#ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
1133 [DEVTYPE_NEXIO] = {
1134 .rept_size = 1024,
1135 .irq_always = true,
1136 .read_data = nexio_read_data,
1137 .alloc = nexio_alloc,
1138 .init = nexio_init,
1139 .exit = nexio_exit,
1140 },
1141#endif
1142};
1143
1144
1145/*****************************************************************************
1146 * Generic Part
1147 */
1148static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
1149 unsigned char *pkt, int len)
1150{
1151 struct usbtouch_device_info *type = usbtouch->type;
1152
1153 if (!type->read_data(usbtouch, pkt))
1154 return;
1155
1156 input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch);
1157
1158 if (swap_xy) {
1159 input_report_abs(usbtouch->input, ABS_X, usbtouch->y);
1160 input_report_abs(usbtouch->input, ABS_Y, usbtouch->x);
1161 } else {
1162 input_report_abs(usbtouch->input, ABS_X, usbtouch->x);
1163 input_report_abs(usbtouch->input, ABS_Y, usbtouch->y);
1164 }
1165 if (type->max_press)
1166 input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press);
1167 input_sync(usbtouch->input);
1168}
1169
1170
1171#ifdef MULTI_PACKET
1172static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1173 unsigned char *pkt, int len)
1174{
1175 unsigned char *buffer;
1176 int pkt_len, pos, buf_len, tmp;
1177
1178 /* process buffer */
1179 if (unlikely(usbtouch->buf_len)) {
1180 /* try to get size */
1181 pkt_len = usbtouch->type->get_pkt_len(
1182 usbtouch->buffer, usbtouch->buf_len);
1183
1184 /* drop? */
1185 if (unlikely(!pkt_len))
1186 goto out_flush_buf;
1187
1188 /* need to append -pkt_len bytes before able to get size */
1189 if (unlikely(pkt_len < 0)) {
1190 int append = -pkt_len;
1191 if (unlikely(append > len))
1192 append = len;
1193 if (usbtouch->buf_len + append >= usbtouch->type->rept_size)
1194 goto out_flush_buf;
1195 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append);
1196 usbtouch->buf_len += append;
1197
1198 pkt_len = usbtouch->type->get_pkt_len(
1199 usbtouch->buffer, usbtouch->buf_len);
1200 if (pkt_len < 0)
1201 return;
1202 }
1203
1204 /* append */
1205 tmp = pkt_len - usbtouch->buf_len;
1206 if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size)
1207 goto out_flush_buf;
1208 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp);
1209 usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len);
1210
1211 buffer = pkt + tmp;
1212 buf_len = len - tmp;
1213 } else {
1214 buffer = pkt;
1215 buf_len = len;
1216 }
1217
1218 /* loop over the received packet, process */
1219 pos = 0;
1220 while (pos < buf_len) {
1221 /* get packet len */
1222 pkt_len = usbtouch->type->get_pkt_len(buffer + pos,
1223 buf_len - pos);
1224
1225 /* unknown packet: skip one byte */
1226 if (unlikely(!pkt_len)) {
1227 pos++;
1228 continue;
1229 }
1230
1231 /* full packet: process */
1232 if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) {
1233 usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len);
1234 } else {
1235 /* incomplete packet: save in buffer */
1236 memcpy(usbtouch->buffer, buffer + pos, buf_len - pos);
1237 usbtouch->buf_len = buf_len - pos;
1238 return;
1239 }
1240 pos += pkt_len;
1241 }
1242
1243out_flush_buf:
1244 usbtouch->buf_len = 0;
1245 return;
1246}
1247#endif
1248
1249
1250static void usbtouch_irq(struct urb *urb)
1251{
1252 struct usbtouch_usb *usbtouch = urb->context;
1253 int retval;
1254
1255 switch (urb->status) {
1256 case 0:
1257 /* success */
1258 break;
1259 case -ETIME:
1260 /* this urb is timing out */
1261 dbg("%s - urb timed out - was the device unplugged?",
1262 __func__);
1263 return;
1264 case -ECONNRESET:
1265 case -ENOENT:
1266 case -ESHUTDOWN:
1267 case -EPIPE:
1268 /* this urb is terminated, clean up */
1269 dbg("%s - urb shutting down with status: %d",
1270 __func__, urb->status);
1271 return;
1272 default:
1273 dbg("%s - nonzero urb status received: %d",
1274 __func__, urb->status);
1275 goto exit;
1276 }
1277
1278 usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length);
1279
1280exit:
1281 usb_mark_last_busy(interface_to_usbdev(usbtouch->interface));
1282 retval = usb_submit_urb(urb, GFP_ATOMIC);
1283 if (retval)
1284 err("%s - usb_submit_urb failed with result: %d",
1285 __func__, retval);
1286}
1287
1288static int usbtouch_open(struct input_dev *input)
1289{
1290 struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1291 int r;
1292
1293 usbtouch->irq->dev = interface_to_usbdev(usbtouch->interface);
1294
1295 r = usb_autopm_get_interface(usbtouch->interface) ? -EIO : 0;
1296 if (r < 0)
1297 goto out;
1298
1299 if (!usbtouch->type->irq_always) {
1300 if (usb_submit_urb(usbtouch->irq, GFP_KERNEL)) {
1301 r = -EIO;
1302 goto out_put;
1303 }
1304 }
1305
1306 usbtouch->interface->needs_remote_wakeup = 1;
1307out_put:
1308 usb_autopm_put_interface(usbtouch->interface);
1309out:
1310 return r;
1311}
1312
1313static void usbtouch_close(struct input_dev *input)
1314{
1315 struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1316 int r;
1317
1318 if (!usbtouch->type->irq_always)
1319 usb_kill_urb(usbtouch->irq);
1320 r = usb_autopm_get_interface(usbtouch->interface);
1321 usbtouch->interface->needs_remote_wakeup = 0;
1322 if (!r)
1323 usb_autopm_put_interface(usbtouch->interface);
1324}
1325
1326static int usbtouch_suspend
1327(struct usb_interface *intf, pm_message_t message)
1328{
1329 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1330
1331 usb_kill_urb(usbtouch->irq);
1332
1333 return 0;
1334}
1335
1336static int usbtouch_resume(struct usb_interface *intf)
1337{
1338 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1339 struct input_dev *input = usbtouch->input;
1340 int result = 0;
1341
1342 mutex_lock(&input->mutex);
1343 if (input->users || usbtouch->type->irq_always)
1344 result = usb_submit_urb(usbtouch->irq, GFP_NOIO);
1345 mutex_unlock(&input->mutex);
1346
1347 return result;
1348}
1349
1350static int usbtouch_reset_resume(struct usb_interface *intf)
1351{
1352 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1353 struct input_dev *input = usbtouch->input;
1354 int err = 0;
1355
1356 /* reinit the device */
1357 if (usbtouch->type->init) {
1358 err = usbtouch->type->init(usbtouch);
1359 if (err) {
1360 dbg("%s - type->init() failed, err: %d",
1361 __func__, err);
1362 return err;
1363 }
1364 }
1365
1366 /* restart IO if needed */
1367 mutex_lock(&input->mutex);
1368 if (input->users)
1369 err = usb_submit_urb(usbtouch->irq, GFP_NOIO);
1370 mutex_unlock(&input->mutex);
1371
1372 return err;
1373}
1374
1375static void usbtouch_free_buffers(struct usb_device *udev,
1376 struct usbtouch_usb *usbtouch)
1377{
1378 usb_free_coherent(udev, usbtouch->type->rept_size,
1379 usbtouch->data, usbtouch->data_dma);
1380 kfree(usbtouch->buffer);
1381}
1382
1383static struct usb_endpoint_descriptor *
1384usbtouch_get_input_endpoint(struct usb_host_interface *interface)
1385{
1386 int i;
1387
1388 for (i = 0; i < interface->desc.bNumEndpoints; i++)
1389 if (usb_endpoint_dir_in(&interface->endpoint[i].desc))
1390 return &interface->endpoint[i].desc;
1391
1392 return NULL;
1393}
1394
1395static int usbtouch_probe(struct usb_interface *intf,
1396 const struct usb_device_id *id)
1397{
1398 struct usbtouch_usb *usbtouch;
1399 struct input_dev *input_dev;
1400 struct usb_endpoint_descriptor *endpoint;
1401 struct usb_device *udev = interface_to_usbdev(intf);
1402 struct usbtouch_device_info *type;
1403 int err = -ENOMEM;
1404
1405 /* some devices are ignored */
1406 if (id->driver_info == DEVTYPE_IGNORE)
1407 return -ENODEV;
1408
1409 endpoint = usbtouch_get_input_endpoint(intf->cur_altsetting);
1410 if (!endpoint)
1411 return -ENXIO;
1412
1413 usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL);
1414 input_dev = input_allocate_device();
1415 if (!usbtouch || !input_dev)
1416 goto out_free;
1417
1418 type = &usbtouch_dev_info[id->driver_info];
1419 usbtouch->type = type;
1420 if (!type->process_pkt)
1421 type->process_pkt = usbtouch_process_pkt;
1422
1423 usbtouch->data = usb_alloc_coherent(udev, type->rept_size,
1424 GFP_KERNEL, &usbtouch->data_dma);
1425 if (!usbtouch->data)
1426 goto out_free;
1427
1428 if (type->get_pkt_len) {
1429 usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL);
1430 if (!usbtouch->buffer)
1431 goto out_free_buffers;
1432 }
1433
1434 usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
1435 if (!usbtouch->irq) {
1436 dbg("%s - usb_alloc_urb failed: usbtouch->irq", __func__);
1437 goto out_free_buffers;
1438 }
1439
1440 usbtouch->interface = intf;
1441 usbtouch->input = input_dev;
1442
1443 if (udev->manufacturer)
1444 strlcpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name));
1445
1446 if (udev->product) {
1447 if (udev->manufacturer)
1448 strlcat(usbtouch->name, " ", sizeof(usbtouch->name));
1449 strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name));
1450 }
1451
1452 if (!strlen(usbtouch->name))
1453 snprintf(usbtouch->name, sizeof(usbtouch->name),
1454 "USB Touchscreen %04x:%04x",
1455 le16_to_cpu(udev->descriptor.idVendor),
1456 le16_to_cpu(udev->descriptor.idProduct));
1457
1458 usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys));
1459 strlcat(usbtouch->phys, "/input0", sizeof(usbtouch->phys));
1460
1461 input_dev->name = usbtouch->name;
1462 input_dev->phys = usbtouch->phys;
1463 usb_to_input_id(udev, &input_dev->id);
1464 input_dev->dev.parent = &intf->dev;
1465
1466 input_set_drvdata(input_dev, usbtouch);
1467
1468 input_dev->open = usbtouch_open;
1469 input_dev->close = usbtouch_close;
1470
1471 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
1472 input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
1473 input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0);
1474 input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0);
1475 if (type->max_press)
1476 input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press,
1477 type->max_press, 0, 0);
1478
1479 if (usb_endpoint_type(endpoint) == USB_ENDPOINT_XFER_INT)
1480 usb_fill_int_urb(usbtouch->irq, udev,
1481 usb_rcvintpipe(udev, endpoint->bEndpointAddress),
1482 usbtouch->data, type->rept_size,
1483 usbtouch_irq, usbtouch, endpoint->bInterval);
1484 else
1485 usb_fill_bulk_urb(usbtouch->irq, udev,
1486 usb_rcvbulkpipe(udev, endpoint->bEndpointAddress),
1487 usbtouch->data, type->rept_size,
1488 usbtouch_irq, usbtouch);
1489
1490 usbtouch->irq->dev = udev;
1491 usbtouch->irq->transfer_dma = usbtouch->data_dma;
1492 usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1493
1494 /* device specific allocations */
1495 if (type->alloc) {
1496 err = type->alloc(usbtouch);
1497 if (err) {
1498 dbg("%s - type->alloc() failed, err: %d", __func__, err);
1499 goto out_free_urb;
1500 }
1501 }
1502
1503 /* device specific initialisation*/
1504 if (type->init) {
1505 err = type->init(usbtouch);
1506 if (err) {
1507 dbg("%s - type->init() failed, err: %d", __func__, err);
1508 goto out_do_exit;
1509 }
1510 }
1511
1512 err = input_register_device(usbtouch->input);
1513 if (err) {
1514 dbg("%s - input_register_device failed, err: %d", __func__, err);
1515 goto out_do_exit;
1516 }
1517
1518 usb_set_intfdata(intf, usbtouch);
1519
1520 if (usbtouch->type->irq_always) {
1521 /* this can't fail */
1522 usb_autopm_get_interface(intf);
1523 err = usb_submit_urb(usbtouch->irq, GFP_KERNEL);
1524 if (err) {
1525 usb_autopm_put_interface(intf);
1526 err("%s - usb_submit_urb failed with result: %d",
1527 __func__, err);
1528 goto out_unregister_input;
1529 }
1530 }
1531
1532 return 0;
1533
1534out_unregister_input:
1535 input_unregister_device(input_dev);
1536 input_dev = NULL;
1537out_do_exit:
1538 if (type->exit)
1539 type->exit(usbtouch);
1540out_free_urb:
1541 usb_free_urb(usbtouch->irq);
1542out_free_buffers:
1543 usbtouch_free_buffers(udev, usbtouch);
1544out_free:
1545 input_free_device(input_dev);
1546 kfree(usbtouch);
1547 return err;
1548}
1549
1550static void usbtouch_disconnect(struct usb_interface *intf)
1551{
1552 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1553
1554 dbg("%s - called", __func__);
1555
1556 if (!usbtouch)
1557 return;
1558
1559 dbg("%s - usbtouch is initialized, cleaning up", __func__);
1560 usb_set_intfdata(intf, NULL);
1561 /* this will stop IO via close */
1562 input_unregister_device(usbtouch->input);
1563 usb_free_urb(usbtouch->irq);
1564 if (usbtouch->type->exit)
1565 usbtouch->type->exit(usbtouch);
1566 usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch);
1567 kfree(usbtouch);
1568}
1569
1570MODULE_DEVICE_TABLE(usb, usbtouch_devices);
1571
1572static struct usb_driver usbtouch_driver = {
1573 .name = "usbtouchscreen",
1574 .probe = usbtouch_probe,
1575 .disconnect = usbtouch_disconnect,
1576 .suspend = usbtouch_suspend,
1577 .resume = usbtouch_resume,
1578 .reset_resume = usbtouch_reset_resume,
1579 .id_table = usbtouch_devices,
1580 .supports_autosuspend = 1,
1581};
1582
1583static int __init usbtouch_init(void)
1584{
1585 return usb_register(&usbtouch_driver);
1586}
1587
1588static void __exit usbtouch_cleanup(void)
1589{
1590 usb_deregister(&usbtouch_driver);
1591}
1592
1593module_init(usbtouch_init);
1594module_exit(usbtouch_cleanup);
1595
1596MODULE_AUTHOR(DRIVER_AUTHOR);
1597MODULE_DESCRIPTION(DRIVER_DESC);
1598MODULE_LICENSE("GPL");
1599
1600MODULE_ALIAS("touchkitusb");
1601MODULE_ALIAS("itmtouch");
1602MODULE_ALIAS("mtouchusb");
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#include <linux/mutex.h>
58
59static bool swap_xy;
60module_param(swap_xy, bool, 0644);
61MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");
62
63static bool hwcalib_xy;
64module_param(hwcalib_xy, bool, 0644);
65MODULE_PARM_DESC(hwcalib_xy, "If set hw-calibrated X/Y are used if available");
66
67/* device specifc data/functions */
68struct usbtouch_usb;
69struct usbtouch_device_info {
70 int min_xc, max_xc;
71 int min_yc, max_yc;
72 int min_press, max_press;
73 int rept_size;
74
75 /*
76 * Always service the USB devices irq not just when the input device is
77 * open. This is useful when devices have a watchdog which prevents us
78 * from periodically polling the device. Leave this unset unless your
79 * touchscreen device requires it, as it does consume more of the USB
80 * bandwidth.
81 */
82 bool irq_always;
83
84 void (*process_pkt) (struct usbtouch_usb *usbtouch, unsigned char *pkt, int len);
85
86 /*
87 * used to get the packet len. possible return values:
88 * > 0: packet len
89 * = 0: skip one byte
90 * < 0: -return value more bytes needed
91 */
92 int (*get_pkt_len) (unsigned char *pkt, int len);
93
94 int (*read_data) (struct usbtouch_usb *usbtouch, unsigned char *pkt);
95 int (*alloc) (struct usbtouch_usb *usbtouch);
96 int (*init) (struct usbtouch_usb *usbtouch);
97 void (*exit) (struct usbtouch_usb *usbtouch);
98};
99
100/* a usbtouch device */
101struct usbtouch_usb {
102 unsigned char *data;
103 dma_addr_t data_dma;
104 int data_size;
105 unsigned char *buffer;
106 int buf_len;
107 struct urb *irq;
108 struct usb_interface *interface;
109 struct input_dev *input;
110 struct usbtouch_device_info *type;
111 struct mutex pm_mutex; /* serialize access to open/suspend */
112 bool is_open;
113 char name[128];
114 char phys[64];
115 void *priv;
116
117 int x, y;
118 int touch, press;
119};
120
121
122/* device types */
123enum {
124 DEVTYPE_IGNORE = -1,
125 DEVTYPE_EGALAX,
126 DEVTYPE_PANJIT,
127 DEVTYPE_3M,
128 DEVTYPE_ITM,
129 DEVTYPE_ETURBO,
130 DEVTYPE_GUNZE,
131 DEVTYPE_DMC_TSC10,
132 DEVTYPE_IRTOUCH,
133 DEVTYPE_IRTOUCH_HIRES,
134 DEVTYPE_IDEALTEK,
135 DEVTYPE_GENERAL_TOUCH,
136 DEVTYPE_GOTOP,
137 DEVTYPE_JASTEC,
138 DEVTYPE_E2I,
139 DEVTYPE_ZYTRONIC,
140 DEVTYPE_TC45USB,
141 DEVTYPE_NEXIO,
142 DEVTYPE_ELO,
143 DEVTYPE_ETOUCH,
144};
145
146#define USB_DEVICE_HID_CLASS(vend, prod) \
147 .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS \
148 | USB_DEVICE_ID_MATCH_DEVICE, \
149 .idVendor = (vend), \
150 .idProduct = (prod), \
151 .bInterfaceClass = USB_INTERFACE_CLASS_HID
152
153static const struct usb_device_id usbtouch_devices[] = {
154#ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
155 /* ignore the HID capable devices, handled by usbhid */
156 {USB_DEVICE_HID_CLASS(0x0eef, 0x0001), .driver_info = DEVTYPE_IGNORE},
157 {USB_DEVICE_HID_CLASS(0x0eef, 0x0002), .driver_info = DEVTYPE_IGNORE},
158
159 /* normal device IDs */
160 {USB_DEVICE(0x3823, 0x0001), .driver_info = DEVTYPE_EGALAX},
161 {USB_DEVICE(0x3823, 0x0002), .driver_info = DEVTYPE_EGALAX},
162 {USB_DEVICE(0x0123, 0x0001), .driver_info = DEVTYPE_EGALAX},
163 {USB_DEVICE(0x0eef, 0x0001), .driver_info = DEVTYPE_EGALAX},
164 {USB_DEVICE(0x0eef, 0x0002), .driver_info = DEVTYPE_EGALAX},
165 {USB_DEVICE(0x1234, 0x0001), .driver_info = DEVTYPE_EGALAX},
166 {USB_DEVICE(0x1234, 0x0002), .driver_info = DEVTYPE_EGALAX},
167#endif
168
169#ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
170 {USB_DEVICE(0x134c, 0x0001), .driver_info = DEVTYPE_PANJIT},
171 {USB_DEVICE(0x134c, 0x0002), .driver_info = DEVTYPE_PANJIT},
172 {USB_DEVICE(0x134c, 0x0003), .driver_info = DEVTYPE_PANJIT},
173 {USB_DEVICE(0x134c, 0x0004), .driver_info = DEVTYPE_PANJIT},
174#endif
175
176#ifdef CONFIG_TOUCHSCREEN_USB_3M
177 {USB_DEVICE(0x0596, 0x0001), .driver_info = DEVTYPE_3M},
178#endif
179
180#ifdef CONFIG_TOUCHSCREEN_USB_ITM
181 {USB_DEVICE(0x0403, 0xf9e9), .driver_info = DEVTYPE_ITM},
182 {USB_DEVICE(0x16e3, 0xf9e9), .driver_info = DEVTYPE_ITM},
183#endif
184
185#ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
186 {USB_DEVICE(0x1234, 0x5678), .driver_info = DEVTYPE_ETURBO},
187#endif
188
189#ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
190 {USB_DEVICE(0x0637, 0x0001), .driver_info = DEVTYPE_GUNZE},
191#endif
192
193#ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
194 {USB_DEVICE(0x0afa, 0x03e8), .driver_info = DEVTYPE_DMC_TSC10},
195#endif
196
197#ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
198 {USB_DEVICE(0x595a, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
199 {USB_DEVICE(0x6615, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
200 {USB_DEVICE(0x6615, 0x0012), .driver_info = DEVTYPE_IRTOUCH_HIRES},
201#endif
202
203#ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
204 {USB_DEVICE(0x1391, 0x1000), .driver_info = DEVTYPE_IDEALTEK},
205#endif
206
207#ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
208 {USB_DEVICE(0x0dfc, 0x0001), .driver_info = DEVTYPE_GENERAL_TOUCH},
209#endif
210
211#ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
212 {USB_DEVICE(0x08f2, 0x007f), .driver_info = DEVTYPE_GOTOP},
213 {USB_DEVICE(0x08f2, 0x00ce), .driver_info = DEVTYPE_GOTOP},
214 {USB_DEVICE(0x08f2, 0x00f4), .driver_info = DEVTYPE_GOTOP},
215#endif
216
217#ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
218 {USB_DEVICE(0x0f92, 0x0001), .driver_info = DEVTYPE_JASTEC},
219#endif
220
221#ifdef CONFIG_TOUCHSCREEN_USB_E2I
222 {USB_DEVICE(0x1ac7, 0x0001), .driver_info = DEVTYPE_E2I},
223#endif
224
225#ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
226 {USB_DEVICE(0x14c8, 0x0003), .driver_info = DEVTYPE_ZYTRONIC},
227#endif
228
229#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
230 /* TC5UH */
231 {USB_DEVICE(0x0664, 0x0309), .driver_info = DEVTYPE_TC45USB},
232 /* TC4UM */
233 {USB_DEVICE(0x0664, 0x0306), .driver_info = DEVTYPE_TC45USB},
234#endif
235
236#ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
237 /* data interface only */
238 {USB_DEVICE_AND_INTERFACE_INFO(0x10f0, 0x2002, 0x0a, 0x00, 0x00),
239 .driver_info = DEVTYPE_NEXIO},
240 {USB_DEVICE_AND_INTERFACE_INFO(0x1870, 0x0001, 0x0a, 0x00, 0x00),
241 .driver_info = DEVTYPE_NEXIO},
242#endif
243
244#ifdef CONFIG_TOUCHSCREEN_USB_ELO
245 {USB_DEVICE(0x04e7, 0x0020), .driver_info = DEVTYPE_ELO},
246#endif
247
248#ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
249 {USB_DEVICE(0x7374, 0x0001), .driver_info = DEVTYPE_ETOUCH},
250#endif
251
252 {}
253};
254
255
256/*****************************************************************************
257 * e2i Part
258 */
259
260#ifdef CONFIG_TOUCHSCREEN_USB_E2I
261static int e2i_init(struct usbtouch_usb *usbtouch)
262{
263 int ret;
264 struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
265
266 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
267 0x01, 0x02, 0x0000, 0x0081,
268 NULL, 0, USB_CTRL_SET_TIMEOUT);
269
270 dev_dbg(&usbtouch->interface->dev,
271 "%s - usb_control_msg - E2I_RESET - bytes|err: %d\n",
272 __func__, ret);
273 return ret;
274}
275
276static int e2i_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
277{
278 int tmp = (pkt[0] << 8) | pkt[1];
279 dev->x = (pkt[2] << 8) | pkt[3];
280 dev->y = (pkt[4] << 8) | pkt[5];
281
282 tmp = tmp - 0xA000;
283 dev->touch = (tmp > 0);
284 dev->press = (tmp > 0 ? tmp : 0);
285
286 return 1;
287}
288#endif
289
290
291/*****************************************************************************
292 * eGalax part
293 */
294
295#ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
296
297#ifndef MULTI_PACKET
298#define MULTI_PACKET
299#endif
300
301#define EGALAX_PKT_TYPE_MASK 0xFE
302#define EGALAX_PKT_TYPE_REPT 0x80
303#define EGALAX_PKT_TYPE_DIAG 0x0A
304
305static int egalax_init(struct usbtouch_usb *usbtouch)
306{
307 int ret, i;
308 unsigned char *buf;
309 struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
310
311 /*
312 * An eGalax diagnostic packet kicks the device into using the right
313 * protocol. We send a "check active" packet. The response will be
314 * read later and ignored.
315 */
316
317 buf = kmalloc(3, GFP_KERNEL);
318 if (!buf)
319 return -ENOMEM;
320
321 buf[0] = EGALAX_PKT_TYPE_DIAG;
322 buf[1] = 1; /* length */
323 buf[2] = 'A'; /* command - check active */
324
325 for (i = 0; i < 3; i++) {
326 ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
327 0,
328 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
329 0, 0, buf, 3,
330 USB_CTRL_SET_TIMEOUT);
331 if (ret >= 0) {
332 ret = 0;
333 break;
334 }
335 if (ret != -EPIPE)
336 break;
337 }
338
339 kfree(buf);
340
341 return ret;
342}
343
344static int egalax_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
345{
346 if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT)
347 return 0;
348
349 dev->x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F);
350 dev->y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F);
351 dev->touch = pkt[0] & 0x01;
352
353 return 1;
354}
355
356static int egalax_get_pkt_len(unsigned char *buf, int len)
357{
358 switch (buf[0] & EGALAX_PKT_TYPE_MASK) {
359 case EGALAX_PKT_TYPE_REPT:
360 return 5;
361
362 case EGALAX_PKT_TYPE_DIAG:
363 if (len < 2)
364 return -1;
365
366 return buf[1] + 2;
367 }
368
369 return 0;
370}
371#endif
372
373/*****************************************************************************
374 * EasyTouch part
375 */
376
377#ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
378
379#ifndef MULTI_PACKET
380#define MULTI_PACKET
381#endif
382
383#define ETOUCH_PKT_TYPE_MASK 0xFE
384#define ETOUCH_PKT_TYPE_REPT 0x80
385#define ETOUCH_PKT_TYPE_REPT2 0xB0
386#define ETOUCH_PKT_TYPE_DIAG 0x0A
387
388static int etouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
389{
390 if ((pkt[0] & ETOUCH_PKT_TYPE_MASK) != ETOUCH_PKT_TYPE_REPT &&
391 (pkt[0] & ETOUCH_PKT_TYPE_MASK) != ETOUCH_PKT_TYPE_REPT2)
392 return 0;
393
394 dev->x = ((pkt[1] & 0x1F) << 7) | (pkt[2] & 0x7F);
395 dev->y = ((pkt[3] & 0x1F) << 7) | (pkt[4] & 0x7F);
396 dev->touch = pkt[0] & 0x01;
397
398 return 1;
399}
400
401static int etouch_get_pkt_len(unsigned char *buf, int len)
402{
403 switch (buf[0] & ETOUCH_PKT_TYPE_MASK) {
404 case ETOUCH_PKT_TYPE_REPT:
405 case ETOUCH_PKT_TYPE_REPT2:
406 return 5;
407
408 case ETOUCH_PKT_TYPE_DIAG:
409 if (len < 2)
410 return -1;
411
412 return buf[1] + 2;
413 }
414
415 return 0;
416}
417#endif
418
419/*****************************************************************************
420 * PanJit Part
421 */
422#ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
423static int panjit_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
424{
425 dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
426 dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
427 dev->touch = pkt[0] & 0x01;
428
429 return 1;
430}
431#endif
432
433
434/*****************************************************************************
435 * 3M/Microtouch Part
436 */
437#ifdef CONFIG_TOUCHSCREEN_USB_3M
438
439#define MTOUCHUSB_ASYNC_REPORT 1
440#define MTOUCHUSB_RESET 7
441#define MTOUCHUSB_REQ_CTRLLR_ID 10
442
443static int mtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
444{
445 if (hwcalib_xy) {
446 dev->x = (pkt[4] << 8) | pkt[3];
447 dev->y = 0xffff - ((pkt[6] << 8) | pkt[5]);
448 } else {
449 dev->x = (pkt[8] << 8) | pkt[7];
450 dev->y = (pkt[10] << 8) | pkt[9];
451 }
452 dev->touch = (pkt[2] & 0x40) ? 1 : 0;
453
454 return 1;
455}
456
457static int mtouch_init(struct usbtouch_usb *usbtouch)
458{
459 int ret, i;
460 struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
461
462 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
463 MTOUCHUSB_RESET,
464 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
465 1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
466 dev_dbg(&usbtouch->interface->dev,
467 "%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d\n",
468 __func__, ret);
469 if (ret < 0)
470 return ret;
471 msleep(150);
472
473 for (i = 0; i < 3; i++) {
474 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
475 MTOUCHUSB_ASYNC_REPORT,
476 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
477 1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT);
478 dev_dbg(&usbtouch->interface->dev,
479 "%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d\n",
480 __func__, ret);
481 if (ret >= 0)
482 break;
483 if (ret != -EPIPE)
484 return ret;
485 }
486
487 /* Default min/max xy are the raw values, override if using hw-calib */
488 if (hwcalib_xy) {
489 input_set_abs_params(usbtouch->input, ABS_X, 0, 0xffff, 0, 0);
490 input_set_abs_params(usbtouch->input, ABS_Y, 0, 0xffff, 0, 0);
491 }
492
493 return 0;
494}
495#endif
496
497
498/*****************************************************************************
499 * ITM Part
500 */
501#ifdef CONFIG_TOUCHSCREEN_USB_ITM
502static int itm_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
503{
504 int touch;
505 /*
506 * ITM devices report invalid x/y data if not touched.
507 * if the screen was touched before but is not touched any more
508 * report touch as 0 with the last valid x/y data once. then stop
509 * reporting data until touched again.
510 */
511 dev->press = ((pkt[2] & 0x01) << 7) | (pkt[5] & 0x7F);
512
513 touch = ~pkt[7] & 0x20;
514 if (!touch) {
515 if (dev->touch) {
516 dev->touch = 0;
517 return 1;
518 }
519
520 return 0;
521 }
522
523 dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F);
524 dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F);
525 dev->touch = touch;
526
527 return 1;
528}
529#endif
530
531
532/*****************************************************************************
533 * eTurboTouch part
534 */
535#ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
536#ifndef MULTI_PACKET
537#define MULTI_PACKET
538#endif
539static int eturbo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
540{
541 unsigned int shift;
542
543 /* packets should start with sync */
544 if (!(pkt[0] & 0x80))
545 return 0;
546
547 shift = (6 - (pkt[0] & 0x03));
548 dev->x = ((pkt[3] << 7) | pkt[4]) >> shift;
549 dev->y = ((pkt[1] << 7) | pkt[2]) >> shift;
550 dev->touch = (pkt[0] & 0x10) ? 1 : 0;
551
552 return 1;
553}
554
555static int eturbo_get_pkt_len(unsigned char *buf, int len)
556{
557 if (buf[0] & 0x80)
558 return 5;
559 if (buf[0] == 0x01)
560 return 3;
561 return 0;
562}
563#endif
564
565
566/*****************************************************************************
567 * Gunze part
568 */
569#ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
570static int gunze_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
571{
572 if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80))
573 return 0;
574
575 dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F);
576 dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F);
577 dev->touch = pkt[0] & 0x20;
578
579 return 1;
580}
581#endif
582
583/*****************************************************************************
584 * DMC TSC-10/25 Part
585 *
586 * Documentation about the controller and it's protocol can be found at
587 * http://www.dmccoltd.com/files/controler/tsc10usb_pi_e.pdf
588 * http://www.dmccoltd.com/files/controler/tsc25_usb_e.pdf
589 */
590#ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
591
592/* supported data rates. currently using 130 */
593#define TSC10_RATE_POINT 0x50
594#define TSC10_RATE_30 0x40
595#define TSC10_RATE_50 0x41
596#define TSC10_RATE_80 0x42
597#define TSC10_RATE_100 0x43
598#define TSC10_RATE_130 0x44
599#define TSC10_RATE_150 0x45
600
601/* commands */
602#define TSC10_CMD_RESET 0x55
603#define TSC10_CMD_RATE 0x05
604#define TSC10_CMD_DATA1 0x01
605
606static int dmc_tsc10_init(struct usbtouch_usb *usbtouch)
607{
608 struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
609 int ret = -ENOMEM;
610 unsigned char *buf;
611
612 buf = kmalloc(2, GFP_NOIO);
613 if (!buf)
614 goto err_nobuf;
615 /* reset */
616 buf[0] = buf[1] = 0xFF;
617 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
618 TSC10_CMD_RESET,
619 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
620 0, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
621 if (ret < 0)
622 goto err_out;
623 if (buf[0] != 0x06) {
624 ret = -ENODEV;
625 goto err_out;
626 }
627
628 /* TSC-25 data sheet specifies a delay after the RESET command */
629 msleep(150);
630
631 /* set coordinate output rate */
632 buf[0] = buf[1] = 0xFF;
633 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
634 TSC10_CMD_RATE,
635 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
636 TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
637 if (ret < 0)
638 goto err_out;
639 if ((buf[0] != 0x06) && (buf[0] != 0x15 || buf[1] != 0x01)) {
640 ret = -ENODEV;
641 goto err_out;
642 }
643
644 /* start sending data */
645 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
646 TSC10_CMD_DATA1,
647 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
648 0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
649err_out:
650 kfree(buf);
651err_nobuf:
652 return ret;
653}
654
655
656static int dmc_tsc10_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
657{
658 dev->x = ((pkt[2] & 0x03) << 8) | pkt[1];
659 dev->y = ((pkt[4] & 0x03) << 8) | pkt[3];
660 dev->touch = pkt[0] & 0x01;
661
662 return 1;
663}
664#endif
665
666
667/*****************************************************************************
668 * IRTOUCH Part
669 */
670#ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
671static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
672{
673 dev->x = (pkt[3] << 8) | pkt[2];
674 dev->y = (pkt[5] << 8) | pkt[4];
675 dev->touch = (pkt[1] & 0x03) ? 1 : 0;
676
677 return 1;
678}
679#endif
680
681/*****************************************************************************
682 * ET&T TC5UH/TC4UM part
683 */
684#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
685static int tc45usb_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
686{
687 dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
688 dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
689 dev->touch = pkt[0] & 0x01;
690
691 return 1;
692}
693#endif
694
695/*****************************************************************************
696 * IdealTEK URTC1000 Part
697 */
698#ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
699#ifndef MULTI_PACKET
700#define MULTI_PACKET
701#endif
702static int idealtek_get_pkt_len(unsigned char *buf, int len)
703{
704 if (buf[0] & 0x80)
705 return 5;
706 if (buf[0] == 0x01)
707 return len;
708 return 0;
709}
710
711static int idealtek_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
712{
713 switch (pkt[0] & 0x98) {
714 case 0x88:
715 /* touch data in IdealTEK mode */
716 dev->x = (pkt[1] << 5) | (pkt[2] >> 2);
717 dev->y = (pkt[3] << 5) | (pkt[4] >> 2);
718 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
719 return 1;
720
721 case 0x98:
722 /* touch data in MT emulation mode */
723 dev->x = (pkt[2] << 5) | (pkt[1] >> 2);
724 dev->y = (pkt[4] << 5) | (pkt[3] >> 2);
725 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
726 return 1;
727
728 default:
729 return 0;
730 }
731}
732#endif
733
734/*****************************************************************************
735 * General Touch Part
736 */
737#ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
738static int general_touch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
739{
740 dev->x = (pkt[2] << 8) | pkt[1];
741 dev->y = (pkt[4] << 8) | pkt[3];
742 dev->press = pkt[5] & 0xff;
743 dev->touch = pkt[0] & 0x01;
744
745 return 1;
746}
747#endif
748
749/*****************************************************************************
750 * GoTop Part
751 */
752#ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
753static int gotop_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
754{
755 dev->x = ((pkt[1] & 0x38) << 4) | pkt[2];
756 dev->y = ((pkt[1] & 0x07) << 7) | pkt[3];
757 dev->touch = pkt[0] & 0x01;
758
759 return 1;
760}
761#endif
762
763/*****************************************************************************
764 * JASTEC Part
765 */
766#ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
767static int jastec_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
768{
769 dev->x = ((pkt[0] & 0x3f) << 6) | (pkt[2] & 0x3f);
770 dev->y = ((pkt[1] & 0x3f) << 6) | (pkt[3] & 0x3f);
771 dev->touch = (pkt[0] & 0x40) >> 6;
772
773 return 1;
774}
775#endif
776
777/*****************************************************************************
778 * Zytronic Part
779 */
780#ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
781static int zytronic_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
782{
783 struct usb_interface *intf = dev->interface;
784
785 switch (pkt[0]) {
786 case 0x3A: /* command response */
787 dev_dbg(&intf->dev, "%s: Command response %d\n", __func__, pkt[1]);
788 break;
789
790 case 0xC0: /* down */
791 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
792 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
793 dev->touch = 1;
794 dev_dbg(&intf->dev, "%s: down %d,%d\n", __func__, dev->x, dev->y);
795 return 1;
796
797 case 0x80: /* up */
798 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
799 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
800 dev->touch = 0;
801 dev_dbg(&intf->dev, "%s: up %d,%d\n", __func__, dev->x, dev->y);
802 return 1;
803
804 default:
805 dev_dbg(&intf->dev, "%s: Unknown return %d\n", __func__, pkt[0]);
806 break;
807 }
808
809 return 0;
810}
811#endif
812
813/*****************************************************************************
814 * NEXIO Part
815 */
816#ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
817
818#define NEXIO_TIMEOUT 5000
819#define NEXIO_BUFSIZE 1024
820#define NEXIO_THRESHOLD 50
821
822struct nexio_priv {
823 struct urb *ack;
824 unsigned char *ack_buf;
825};
826
827struct nexio_touch_packet {
828 u8 flags; /* 0xe1 = touch, 0xe1 = release */
829 __be16 data_len; /* total bytes of touch data */
830 __be16 x_len; /* bytes for X axis */
831 __be16 y_len; /* bytes for Y axis */
832 u8 data[];
833} __attribute__ ((packed));
834
835static unsigned char nexio_ack_pkt[2] = { 0xaa, 0x02 };
836static unsigned char nexio_init_pkt[4] = { 0x82, 0x04, 0x0a, 0x0f };
837
838static void nexio_ack_complete(struct urb *urb)
839{
840}
841
842static int nexio_alloc(struct usbtouch_usb *usbtouch)
843{
844 struct nexio_priv *priv;
845 int ret = -ENOMEM;
846
847 usbtouch->priv = kmalloc(sizeof(struct nexio_priv), GFP_KERNEL);
848 if (!usbtouch->priv)
849 goto out_buf;
850
851 priv = usbtouch->priv;
852
853 priv->ack_buf = kmemdup(nexio_ack_pkt, sizeof(nexio_ack_pkt),
854 GFP_KERNEL);
855 if (!priv->ack_buf)
856 goto err_priv;
857
858 priv->ack = usb_alloc_urb(0, GFP_KERNEL);
859 if (!priv->ack) {
860 dev_dbg(&usbtouch->interface->dev,
861 "%s - usb_alloc_urb failed: usbtouch->ack\n", __func__);
862 goto err_ack_buf;
863 }
864
865 return 0;
866
867err_ack_buf:
868 kfree(priv->ack_buf);
869err_priv:
870 kfree(priv);
871out_buf:
872 return ret;
873}
874
875static int nexio_init(struct usbtouch_usb *usbtouch)
876{
877 struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
878 struct usb_host_interface *interface = usbtouch->interface->cur_altsetting;
879 struct nexio_priv *priv = usbtouch->priv;
880 int ret = -ENOMEM;
881 int actual_len, i;
882 unsigned char *buf;
883 char *firmware_ver = NULL, *device_name = NULL;
884 int input_ep = 0, output_ep = 0;
885
886 /* find first input and output endpoint */
887 for (i = 0; i < interface->desc.bNumEndpoints; i++) {
888 if (!input_ep &&
889 usb_endpoint_dir_in(&interface->endpoint[i].desc))
890 input_ep = interface->endpoint[i].desc.bEndpointAddress;
891 if (!output_ep &&
892 usb_endpoint_dir_out(&interface->endpoint[i].desc))
893 output_ep = interface->endpoint[i].desc.bEndpointAddress;
894 }
895 if (!input_ep || !output_ep)
896 return -ENXIO;
897
898 buf = kmalloc(NEXIO_BUFSIZE, GFP_NOIO);
899 if (!buf)
900 goto out_buf;
901
902 /* two empty reads */
903 for (i = 0; i < 2; i++) {
904 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
905 buf, NEXIO_BUFSIZE, &actual_len,
906 NEXIO_TIMEOUT);
907 if (ret < 0)
908 goto out_buf;
909 }
910
911 /* send init command */
912 memcpy(buf, nexio_init_pkt, sizeof(nexio_init_pkt));
913 ret = usb_bulk_msg(dev, usb_sndbulkpipe(dev, output_ep),
914 buf, sizeof(nexio_init_pkt), &actual_len,
915 NEXIO_TIMEOUT);
916 if (ret < 0)
917 goto out_buf;
918
919 /* read replies */
920 for (i = 0; i < 3; i++) {
921 memset(buf, 0, NEXIO_BUFSIZE);
922 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
923 buf, NEXIO_BUFSIZE, &actual_len,
924 NEXIO_TIMEOUT);
925 if (ret < 0 || actual_len < 1 || buf[1] != actual_len)
926 continue;
927 switch (buf[0]) {
928 case 0x83: /* firmware version */
929 if (!firmware_ver)
930 firmware_ver = kstrdup(&buf[2], GFP_NOIO);
931 break;
932 case 0x84: /* device name */
933 if (!device_name)
934 device_name = kstrdup(&buf[2], GFP_NOIO);
935 break;
936 }
937 }
938
939 printk(KERN_INFO "Nexio device: %s, firmware version: %s\n",
940 device_name, firmware_ver);
941
942 kfree(firmware_ver);
943 kfree(device_name);
944
945 usb_fill_bulk_urb(priv->ack, dev, usb_sndbulkpipe(dev, output_ep),
946 priv->ack_buf, sizeof(nexio_ack_pkt),
947 nexio_ack_complete, usbtouch);
948 ret = 0;
949
950out_buf:
951 kfree(buf);
952 return ret;
953}
954
955static void nexio_exit(struct usbtouch_usb *usbtouch)
956{
957 struct nexio_priv *priv = usbtouch->priv;
958
959 usb_kill_urb(priv->ack);
960 usb_free_urb(priv->ack);
961 kfree(priv->ack_buf);
962 kfree(priv);
963}
964
965static int nexio_read_data(struct usbtouch_usb *usbtouch, unsigned char *pkt)
966{
967 struct nexio_touch_packet *packet = (void *) pkt;
968 struct nexio_priv *priv = usbtouch->priv;
969 unsigned int data_len = be16_to_cpu(packet->data_len);
970 unsigned int x_len = be16_to_cpu(packet->x_len);
971 unsigned int y_len = be16_to_cpu(packet->y_len);
972 int x, y, begin_x, begin_y, end_x, end_y, w, h, ret;
973
974 /* got touch data? */
975 if ((pkt[0] & 0xe0) != 0xe0)
976 return 0;
977
978 if (data_len > 0xff)
979 data_len -= 0x100;
980 if (x_len > 0xff)
981 x_len -= 0x80;
982
983 /* send ACK */
984 ret = usb_submit_urb(priv->ack, GFP_ATOMIC);
985
986 if (!usbtouch->type->max_xc) {
987 usbtouch->type->max_xc = 2 * x_len;
988 input_set_abs_params(usbtouch->input, ABS_X,
989 0, usbtouch->type->max_xc, 0, 0);
990 usbtouch->type->max_yc = 2 * y_len;
991 input_set_abs_params(usbtouch->input, ABS_Y,
992 0, usbtouch->type->max_yc, 0, 0);
993 }
994 /*
995 * The device reports state of IR sensors on X and Y axes.
996 * Each byte represents "darkness" percentage (0-100) of one element.
997 * 17" touchscreen reports only 64 x 52 bytes so the resolution is low.
998 * This also means that there's a limited multi-touch capability but
999 * it's disabled (and untested) here as there's no X driver for that.
1000 */
1001 begin_x = end_x = begin_y = end_y = -1;
1002 for (x = 0; x < x_len; x++) {
1003 if (begin_x == -1 && packet->data[x] > NEXIO_THRESHOLD) {
1004 begin_x = x;
1005 continue;
1006 }
1007 if (end_x == -1 && begin_x != -1 && packet->data[x] < NEXIO_THRESHOLD) {
1008 end_x = x - 1;
1009 for (y = x_len; y < data_len; y++) {
1010 if (begin_y == -1 && packet->data[y] > NEXIO_THRESHOLD) {
1011 begin_y = y - x_len;
1012 continue;
1013 }
1014 if (end_y == -1 &&
1015 begin_y != -1 && packet->data[y] < NEXIO_THRESHOLD) {
1016 end_y = y - 1 - x_len;
1017 w = end_x - begin_x;
1018 h = end_y - begin_y;
1019#if 0
1020 /* multi-touch */
1021 input_report_abs(usbtouch->input,
1022 ABS_MT_TOUCH_MAJOR, max(w,h));
1023 input_report_abs(usbtouch->input,
1024 ABS_MT_TOUCH_MINOR, min(x,h));
1025 input_report_abs(usbtouch->input,
1026 ABS_MT_POSITION_X, 2*begin_x+w);
1027 input_report_abs(usbtouch->input,
1028 ABS_MT_POSITION_Y, 2*begin_y+h);
1029 input_report_abs(usbtouch->input,
1030 ABS_MT_ORIENTATION, w > h);
1031 input_mt_sync(usbtouch->input);
1032#endif
1033 /* single touch */
1034 usbtouch->x = 2 * begin_x + w;
1035 usbtouch->y = 2 * begin_y + h;
1036 usbtouch->touch = packet->flags & 0x01;
1037 begin_y = end_y = -1;
1038 return 1;
1039 }
1040 }
1041 begin_x = end_x = -1;
1042 }
1043
1044 }
1045 return 0;
1046}
1047#endif
1048
1049
1050/*****************************************************************************
1051 * ELO part
1052 */
1053
1054#ifdef CONFIG_TOUCHSCREEN_USB_ELO
1055
1056static int elo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
1057{
1058 dev->x = (pkt[3] << 8) | pkt[2];
1059 dev->y = (pkt[5] << 8) | pkt[4];
1060 dev->touch = pkt[6] > 0;
1061 dev->press = pkt[6];
1062
1063 return 1;
1064}
1065#endif
1066
1067
1068/*****************************************************************************
1069 * the different device descriptors
1070 */
1071#ifdef MULTI_PACKET
1072static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1073 unsigned char *pkt, int len);
1074#endif
1075
1076static struct usbtouch_device_info usbtouch_dev_info[] = {
1077#ifdef CONFIG_TOUCHSCREEN_USB_ELO
1078 [DEVTYPE_ELO] = {
1079 .min_xc = 0x0,
1080 .max_xc = 0x0fff,
1081 .min_yc = 0x0,
1082 .max_yc = 0x0fff,
1083 .max_press = 0xff,
1084 .rept_size = 8,
1085 .read_data = elo_read_data,
1086 },
1087#endif
1088
1089#ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
1090 [DEVTYPE_EGALAX] = {
1091 .min_xc = 0x0,
1092 .max_xc = 0x07ff,
1093 .min_yc = 0x0,
1094 .max_yc = 0x07ff,
1095 .rept_size = 16,
1096 .process_pkt = usbtouch_process_multi,
1097 .get_pkt_len = egalax_get_pkt_len,
1098 .read_data = egalax_read_data,
1099 .init = egalax_init,
1100 },
1101#endif
1102
1103#ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
1104 [DEVTYPE_PANJIT] = {
1105 .min_xc = 0x0,
1106 .max_xc = 0x0fff,
1107 .min_yc = 0x0,
1108 .max_yc = 0x0fff,
1109 .rept_size = 8,
1110 .read_data = panjit_read_data,
1111 },
1112#endif
1113
1114#ifdef CONFIG_TOUCHSCREEN_USB_3M
1115 [DEVTYPE_3M] = {
1116 .min_xc = 0x0,
1117 .max_xc = 0x4000,
1118 .min_yc = 0x0,
1119 .max_yc = 0x4000,
1120 .rept_size = 11,
1121 .read_data = mtouch_read_data,
1122 .init = mtouch_init,
1123 },
1124#endif
1125
1126#ifdef CONFIG_TOUCHSCREEN_USB_ITM
1127 [DEVTYPE_ITM] = {
1128 .min_xc = 0x0,
1129 .max_xc = 0x0fff,
1130 .min_yc = 0x0,
1131 .max_yc = 0x0fff,
1132 .max_press = 0xff,
1133 .rept_size = 8,
1134 .read_data = itm_read_data,
1135 },
1136#endif
1137
1138#ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
1139 [DEVTYPE_ETURBO] = {
1140 .min_xc = 0x0,
1141 .max_xc = 0x07ff,
1142 .min_yc = 0x0,
1143 .max_yc = 0x07ff,
1144 .rept_size = 8,
1145 .process_pkt = usbtouch_process_multi,
1146 .get_pkt_len = eturbo_get_pkt_len,
1147 .read_data = eturbo_read_data,
1148 },
1149#endif
1150
1151#ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
1152 [DEVTYPE_GUNZE] = {
1153 .min_xc = 0x0,
1154 .max_xc = 0x0fff,
1155 .min_yc = 0x0,
1156 .max_yc = 0x0fff,
1157 .rept_size = 4,
1158 .read_data = gunze_read_data,
1159 },
1160#endif
1161
1162#ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
1163 [DEVTYPE_DMC_TSC10] = {
1164 .min_xc = 0x0,
1165 .max_xc = 0x03ff,
1166 .min_yc = 0x0,
1167 .max_yc = 0x03ff,
1168 .rept_size = 5,
1169 .init = dmc_tsc10_init,
1170 .read_data = dmc_tsc10_read_data,
1171 },
1172#endif
1173
1174#ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
1175 [DEVTYPE_IRTOUCH] = {
1176 .min_xc = 0x0,
1177 .max_xc = 0x0fff,
1178 .min_yc = 0x0,
1179 .max_yc = 0x0fff,
1180 .rept_size = 8,
1181 .read_data = irtouch_read_data,
1182 },
1183
1184 [DEVTYPE_IRTOUCH_HIRES] = {
1185 .min_xc = 0x0,
1186 .max_xc = 0x7fff,
1187 .min_yc = 0x0,
1188 .max_yc = 0x7fff,
1189 .rept_size = 8,
1190 .read_data = irtouch_read_data,
1191 },
1192#endif
1193
1194#ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
1195 [DEVTYPE_IDEALTEK] = {
1196 .min_xc = 0x0,
1197 .max_xc = 0x0fff,
1198 .min_yc = 0x0,
1199 .max_yc = 0x0fff,
1200 .rept_size = 8,
1201 .process_pkt = usbtouch_process_multi,
1202 .get_pkt_len = idealtek_get_pkt_len,
1203 .read_data = idealtek_read_data,
1204 },
1205#endif
1206
1207#ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
1208 [DEVTYPE_GENERAL_TOUCH] = {
1209 .min_xc = 0x0,
1210 .max_xc = 0x7fff,
1211 .min_yc = 0x0,
1212 .max_yc = 0x7fff,
1213 .rept_size = 7,
1214 .read_data = general_touch_read_data,
1215 },
1216#endif
1217
1218#ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
1219 [DEVTYPE_GOTOP] = {
1220 .min_xc = 0x0,
1221 .max_xc = 0x03ff,
1222 .min_yc = 0x0,
1223 .max_yc = 0x03ff,
1224 .rept_size = 4,
1225 .read_data = gotop_read_data,
1226 },
1227#endif
1228
1229#ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
1230 [DEVTYPE_JASTEC] = {
1231 .min_xc = 0x0,
1232 .max_xc = 0x0fff,
1233 .min_yc = 0x0,
1234 .max_yc = 0x0fff,
1235 .rept_size = 4,
1236 .read_data = jastec_read_data,
1237 },
1238#endif
1239
1240#ifdef CONFIG_TOUCHSCREEN_USB_E2I
1241 [DEVTYPE_E2I] = {
1242 .min_xc = 0x0,
1243 .max_xc = 0x7fff,
1244 .min_yc = 0x0,
1245 .max_yc = 0x7fff,
1246 .rept_size = 6,
1247 .init = e2i_init,
1248 .read_data = e2i_read_data,
1249 },
1250#endif
1251
1252#ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
1253 [DEVTYPE_ZYTRONIC] = {
1254 .min_xc = 0x0,
1255 .max_xc = 0x03ff,
1256 .min_yc = 0x0,
1257 .max_yc = 0x03ff,
1258 .rept_size = 5,
1259 .read_data = zytronic_read_data,
1260 .irq_always = true,
1261 },
1262#endif
1263
1264#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
1265 [DEVTYPE_TC45USB] = {
1266 .min_xc = 0x0,
1267 .max_xc = 0x0fff,
1268 .min_yc = 0x0,
1269 .max_yc = 0x0fff,
1270 .rept_size = 5,
1271 .read_data = tc45usb_read_data,
1272 },
1273#endif
1274
1275#ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
1276 [DEVTYPE_NEXIO] = {
1277 .rept_size = 1024,
1278 .irq_always = true,
1279 .read_data = nexio_read_data,
1280 .alloc = nexio_alloc,
1281 .init = nexio_init,
1282 .exit = nexio_exit,
1283 },
1284#endif
1285#ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
1286 [DEVTYPE_ETOUCH] = {
1287 .min_xc = 0x0,
1288 .max_xc = 0x07ff,
1289 .min_yc = 0x0,
1290 .max_yc = 0x07ff,
1291 .rept_size = 16,
1292 .process_pkt = usbtouch_process_multi,
1293 .get_pkt_len = etouch_get_pkt_len,
1294 .read_data = etouch_read_data,
1295 },
1296#endif
1297};
1298
1299
1300/*****************************************************************************
1301 * Generic Part
1302 */
1303static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
1304 unsigned char *pkt, int len)
1305{
1306 struct usbtouch_device_info *type = usbtouch->type;
1307
1308 if (!type->read_data(usbtouch, pkt))
1309 return;
1310
1311 input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch);
1312
1313 if (swap_xy) {
1314 input_report_abs(usbtouch->input, ABS_X, usbtouch->y);
1315 input_report_abs(usbtouch->input, ABS_Y, usbtouch->x);
1316 } else {
1317 input_report_abs(usbtouch->input, ABS_X, usbtouch->x);
1318 input_report_abs(usbtouch->input, ABS_Y, usbtouch->y);
1319 }
1320 if (type->max_press)
1321 input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press);
1322 input_sync(usbtouch->input);
1323}
1324
1325
1326#ifdef MULTI_PACKET
1327static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1328 unsigned char *pkt, int len)
1329{
1330 unsigned char *buffer;
1331 int pkt_len, pos, buf_len, tmp;
1332
1333 /* process buffer */
1334 if (unlikely(usbtouch->buf_len)) {
1335 /* try to get size */
1336 pkt_len = usbtouch->type->get_pkt_len(
1337 usbtouch->buffer, usbtouch->buf_len);
1338
1339 /* drop? */
1340 if (unlikely(!pkt_len))
1341 goto out_flush_buf;
1342
1343 /* need to append -pkt_len bytes before able to get size */
1344 if (unlikely(pkt_len < 0)) {
1345 int append = -pkt_len;
1346 if (unlikely(append > len))
1347 append = len;
1348 if (usbtouch->buf_len + append >= usbtouch->type->rept_size)
1349 goto out_flush_buf;
1350 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append);
1351 usbtouch->buf_len += append;
1352
1353 pkt_len = usbtouch->type->get_pkt_len(
1354 usbtouch->buffer, usbtouch->buf_len);
1355 if (pkt_len < 0)
1356 return;
1357 }
1358
1359 /* append */
1360 tmp = pkt_len - usbtouch->buf_len;
1361 if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size)
1362 goto out_flush_buf;
1363 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp);
1364 usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len);
1365
1366 buffer = pkt + tmp;
1367 buf_len = len - tmp;
1368 } else {
1369 buffer = pkt;
1370 buf_len = len;
1371 }
1372
1373 /* loop over the received packet, process */
1374 pos = 0;
1375 while (pos < buf_len) {
1376 /* get packet len */
1377 pkt_len = usbtouch->type->get_pkt_len(buffer + pos,
1378 buf_len - pos);
1379
1380 /* unknown packet: skip one byte */
1381 if (unlikely(!pkt_len)) {
1382 pos++;
1383 continue;
1384 }
1385
1386 /* full packet: process */
1387 if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) {
1388 usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len);
1389 } else {
1390 /* incomplete packet: save in buffer */
1391 memcpy(usbtouch->buffer, buffer + pos, buf_len - pos);
1392 usbtouch->buf_len = buf_len - pos;
1393 return;
1394 }
1395 pos += pkt_len;
1396 }
1397
1398out_flush_buf:
1399 usbtouch->buf_len = 0;
1400 return;
1401}
1402#endif
1403
1404
1405static void usbtouch_irq(struct urb *urb)
1406{
1407 struct usbtouch_usb *usbtouch = urb->context;
1408 struct device *dev = &usbtouch->interface->dev;
1409 int retval;
1410
1411 switch (urb->status) {
1412 case 0:
1413 /* success */
1414 break;
1415 case -ETIME:
1416 /* this urb is timing out */
1417 dev_dbg(dev,
1418 "%s - urb timed out - was the device unplugged?\n",
1419 __func__);
1420 return;
1421 case -ECONNRESET:
1422 case -ENOENT:
1423 case -ESHUTDOWN:
1424 case -EPIPE:
1425 /* this urb is terminated, clean up */
1426 dev_dbg(dev, "%s - urb shutting down with status: %d\n",
1427 __func__, urb->status);
1428 return;
1429 default:
1430 dev_dbg(dev, "%s - nonzero urb status received: %d\n",
1431 __func__, urb->status);
1432 goto exit;
1433 }
1434
1435 usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length);
1436
1437exit:
1438 usb_mark_last_busy(interface_to_usbdev(usbtouch->interface));
1439 retval = usb_submit_urb(urb, GFP_ATOMIC);
1440 if (retval)
1441 dev_err(dev, "%s - usb_submit_urb failed with result: %d\n",
1442 __func__, retval);
1443}
1444
1445static int usbtouch_open(struct input_dev *input)
1446{
1447 struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1448 int r;
1449
1450 usbtouch->irq->dev = interface_to_usbdev(usbtouch->interface);
1451
1452 r = usb_autopm_get_interface(usbtouch->interface) ? -EIO : 0;
1453 if (r < 0)
1454 goto out;
1455
1456 mutex_lock(&usbtouch->pm_mutex);
1457 if (!usbtouch->type->irq_always) {
1458 if (usb_submit_urb(usbtouch->irq, GFP_KERNEL)) {
1459 r = -EIO;
1460 goto out_put;
1461 }
1462 }
1463
1464 usbtouch->interface->needs_remote_wakeup = 1;
1465 usbtouch->is_open = true;
1466out_put:
1467 mutex_unlock(&usbtouch->pm_mutex);
1468 usb_autopm_put_interface(usbtouch->interface);
1469out:
1470 return r;
1471}
1472
1473static void usbtouch_close(struct input_dev *input)
1474{
1475 struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1476 int r;
1477
1478 mutex_lock(&usbtouch->pm_mutex);
1479 if (!usbtouch->type->irq_always)
1480 usb_kill_urb(usbtouch->irq);
1481 usbtouch->is_open = false;
1482 mutex_unlock(&usbtouch->pm_mutex);
1483
1484 r = usb_autopm_get_interface(usbtouch->interface);
1485 usbtouch->interface->needs_remote_wakeup = 0;
1486 if (!r)
1487 usb_autopm_put_interface(usbtouch->interface);
1488}
1489
1490static int usbtouch_suspend
1491(struct usb_interface *intf, pm_message_t message)
1492{
1493 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1494
1495 usb_kill_urb(usbtouch->irq);
1496
1497 return 0;
1498}
1499
1500static int usbtouch_resume(struct usb_interface *intf)
1501{
1502 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1503 int result = 0;
1504
1505 mutex_lock(&usbtouch->pm_mutex);
1506 if (usbtouch->is_open || usbtouch->type->irq_always)
1507 result = usb_submit_urb(usbtouch->irq, GFP_NOIO);
1508 mutex_unlock(&usbtouch->pm_mutex);
1509
1510 return result;
1511}
1512
1513static int usbtouch_reset_resume(struct usb_interface *intf)
1514{
1515 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1516 int err = 0;
1517
1518 /* reinit the device */
1519 if (usbtouch->type->init) {
1520 err = usbtouch->type->init(usbtouch);
1521 if (err) {
1522 dev_dbg(&intf->dev,
1523 "%s - type->init() failed, err: %d\n",
1524 __func__, err);
1525 return err;
1526 }
1527 }
1528
1529 /* restart IO if needed */
1530 mutex_lock(&usbtouch->pm_mutex);
1531 if (usbtouch->is_open)
1532 err = usb_submit_urb(usbtouch->irq, GFP_NOIO);
1533 mutex_unlock(&usbtouch->pm_mutex);
1534
1535 return err;
1536}
1537
1538static void usbtouch_free_buffers(struct usb_device *udev,
1539 struct usbtouch_usb *usbtouch)
1540{
1541 usb_free_coherent(udev, usbtouch->data_size,
1542 usbtouch->data, usbtouch->data_dma);
1543 kfree(usbtouch->buffer);
1544}
1545
1546static struct usb_endpoint_descriptor *
1547usbtouch_get_input_endpoint(struct usb_host_interface *interface)
1548{
1549 int i;
1550
1551 for (i = 0; i < interface->desc.bNumEndpoints; i++)
1552 if (usb_endpoint_dir_in(&interface->endpoint[i].desc))
1553 return &interface->endpoint[i].desc;
1554
1555 return NULL;
1556}
1557
1558static int usbtouch_probe(struct usb_interface *intf,
1559 const struct usb_device_id *id)
1560{
1561 struct usbtouch_usb *usbtouch;
1562 struct input_dev *input_dev;
1563 struct usb_endpoint_descriptor *endpoint;
1564 struct usb_device *udev = interface_to_usbdev(intf);
1565 struct usbtouch_device_info *type;
1566 int err = -ENOMEM;
1567
1568 /* some devices are ignored */
1569 if (id->driver_info == DEVTYPE_IGNORE)
1570 return -ENODEV;
1571
1572 endpoint = usbtouch_get_input_endpoint(intf->cur_altsetting);
1573 if (!endpoint)
1574 return -ENXIO;
1575
1576 usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL);
1577 input_dev = input_allocate_device();
1578 if (!usbtouch || !input_dev)
1579 goto out_free;
1580
1581 type = &usbtouch_dev_info[id->driver_info];
1582 usbtouch->type = type;
1583 if (!type->process_pkt)
1584 type->process_pkt = usbtouch_process_pkt;
1585
1586 usbtouch->data_size = type->rept_size;
1587 if (type->get_pkt_len) {
1588 /*
1589 * When dealing with variable-length packets we should
1590 * not request more than wMaxPacketSize bytes at once
1591 * as we do not know if there is more data coming or
1592 * we filled exactly wMaxPacketSize bytes and there is
1593 * nothing else.
1594 */
1595 usbtouch->data_size = min(usbtouch->data_size,
1596 usb_endpoint_maxp(endpoint));
1597 }
1598
1599 usbtouch->data = usb_alloc_coherent(udev, usbtouch->data_size,
1600 GFP_KERNEL, &usbtouch->data_dma);
1601 if (!usbtouch->data)
1602 goto out_free;
1603
1604 if (type->get_pkt_len) {
1605 usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL);
1606 if (!usbtouch->buffer)
1607 goto out_free_buffers;
1608 }
1609
1610 usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
1611 if (!usbtouch->irq) {
1612 dev_dbg(&intf->dev,
1613 "%s - usb_alloc_urb failed: usbtouch->irq\n", __func__);
1614 goto out_free_buffers;
1615 }
1616
1617 usbtouch->interface = intf;
1618 usbtouch->input = input_dev;
1619
1620 if (udev->manufacturer)
1621 strlcpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name));
1622
1623 if (udev->product) {
1624 if (udev->manufacturer)
1625 strlcat(usbtouch->name, " ", sizeof(usbtouch->name));
1626 strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name));
1627 }
1628
1629 if (!strlen(usbtouch->name))
1630 snprintf(usbtouch->name, sizeof(usbtouch->name),
1631 "USB Touchscreen %04x:%04x",
1632 le16_to_cpu(udev->descriptor.idVendor),
1633 le16_to_cpu(udev->descriptor.idProduct));
1634
1635 usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys));
1636 strlcat(usbtouch->phys, "/input0", sizeof(usbtouch->phys));
1637
1638 input_dev->name = usbtouch->name;
1639 input_dev->phys = usbtouch->phys;
1640 usb_to_input_id(udev, &input_dev->id);
1641 input_dev->dev.parent = &intf->dev;
1642
1643 input_set_drvdata(input_dev, usbtouch);
1644
1645 input_dev->open = usbtouch_open;
1646 input_dev->close = usbtouch_close;
1647
1648 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
1649 input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
1650 input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0);
1651 input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0);
1652 if (type->max_press)
1653 input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press,
1654 type->max_press, 0, 0);
1655
1656 if (usb_endpoint_type(endpoint) == USB_ENDPOINT_XFER_INT)
1657 usb_fill_int_urb(usbtouch->irq, udev,
1658 usb_rcvintpipe(udev, endpoint->bEndpointAddress),
1659 usbtouch->data, usbtouch->data_size,
1660 usbtouch_irq, usbtouch, endpoint->bInterval);
1661 else
1662 usb_fill_bulk_urb(usbtouch->irq, udev,
1663 usb_rcvbulkpipe(udev, endpoint->bEndpointAddress),
1664 usbtouch->data, usbtouch->data_size,
1665 usbtouch_irq, usbtouch);
1666
1667 usbtouch->irq->dev = udev;
1668 usbtouch->irq->transfer_dma = usbtouch->data_dma;
1669 usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1670
1671 /* device specific allocations */
1672 if (type->alloc) {
1673 err = type->alloc(usbtouch);
1674 if (err) {
1675 dev_dbg(&intf->dev,
1676 "%s - type->alloc() failed, err: %d\n",
1677 __func__, err);
1678 goto out_free_urb;
1679 }
1680 }
1681
1682 /* device specific initialisation*/
1683 if (type->init) {
1684 err = type->init(usbtouch);
1685 if (err) {
1686 dev_dbg(&intf->dev,
1687 "%s - type->init() failed, err: %d\n",
1688 __func__, err);
1689 goto out_do_exit;
1690 }
1691 }
1692
1693 err = input_register_device(usbtouch->input);
1694 if (err) {
1695 dev_dbg(&intf->dev,
1696 "%s - input_register_device failed, err: %d\n",
1697 __func__, err);
1698 goto out_do_exit;
1699 }
1700
1701 usb_set_intfdata(intf, usbtouch);
1702
1703 if (usbtouch->type->irq_always) {
1704 /* this can't fail */
1705 usb_autopm_get_interface(intf);
1706 err = usb_submit_urb(usbtouch->irq, GFP_KERNEL);
1707 if (err) {
1708 usb_autopm_put_interface(intf);
1709 dev_err(&intf->dev,
1710 "%s - usb_submit_urb failed with result: %d\n",
1711 __func__, err);
1712 goto out_unregister_input;
1713 }
1714 }
1715
1716 return 0;
1717
1718out_unregister_input:
1719 input_unregister_device(input_dev);
1720 input_dev = NULL;
1721out_do_exit:
1722 if (type->exit)
1723 type->exit(usbtouch);
1724out_free_urb:
1725 usb_free_urb(usbtouch->irq);
1726out_free_buffers:
1727 usbtouch_free_buffers(udev, usbtouch);
1728out_free:
1729 input_free_device(input_dev);
1730 kfree(usbtouch);
1731 return err;
1732}
1733
1734static void usbtouch_disconnect(struct usb_interface *intf)
1735{
1736 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1737
1738 if (!usbtouch)
1739 return;
1740
1741 dev_dbg(&intf->dev,
1742 "%s - usbtouch is initialized, cleaning up\n", __func__);
1743
1744 usb_set_intfdata(intf, NULL);
1745 /* this will stop IO via close */
1746 input_unregister_device(usbtouch->input);
1747 usb_free_urb(usbtouch->irq);
1748 if (usbtouch->type->exit)
1749 usbtouch->type->exit(usbtouch);
1750 usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch);
1751 kfree(usbtouch);
1752}
1753
1754MODULE_DEVICE_TABLE(usb, usbtouch_devices);
1755
1756static struct usb_driver usbtouch_driver = {
1757 .name = "usbtouchscreen",
1758 .probe = usbtouch_probe,
1759 .disconnect = usbtouch_disconnect,
1760 .suspend = usbtouch_suspend,
1761 .resume = usbtouch_resume,
1762 .reset_resume = usbtouch_reset_resume,
1763 .id_table = usbtouch_devices,
1764 .supports_autosuspend = 1,
1765};
1766
1767module_usb_driver(usbtouch_driver);
1768
1769MODULE_AUTHOR("Daniel Ritz <daniel.ritz@gmx.ch>");
1770MODULE_DESCRIPTION("USB Touchscreen Driver");
1771MODULE_LICENSE("GPL");
1772
1773MODULE_ALIAS("touchkitusb");
1774MODULE_ALIAS("itmtouch");
1775MODULE_ALIAS("mtouchusb");