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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// SPDX-License-Identifier: GPL-2.0-or-later
2/******************************************************************************
3 * usbtouchscreen.c
4 * Driver for USB Touchscreens, supporting those devices:
5 * - eGalax Touchkit
6 * includes eTurboTouch CT-410/510/700
7 * - 3M/Microtouch EX II series
8 * - ITM
9 * - PanJit TouchSet
10 * - eTurboTouch
11 * - Gunze AHL61
12 * - DMC TSC-10/25
13 * - IRTOUCHSYSTEMS/UNITOP
14 * - IdealTEK URTC1000
15 * - General Touch
16 * - GoTop Super_Q2/GogoPen/PenPower tablets
17 * - JASTEC USB touch controller/DigiTech DTR-02U
18 * - Zytronic capacitive touchscreen
19 * - NEXIO/iNexio
20 * - Elo TouchSystems 2700 IntelliTouch
21 * - EasyTouch USB Dual/Multi touch controller from Data Modul
22 *
23 * Copyright (C) 2004-2007 by Daniel Ritz <daniel.ritz@gmx.ch>
24 * Copyright (C) by Todd E. Johnson (mtouchusb.c)
25 *
26 * Driver is based on touchkitusb.c
27 * - ITM parts are from itmtouch.c
28 * - 3M parts are from mtouchusb.c
29 * - PanJit parts are from an unmerged driver by Lanslott Gish
30 * - DMC TSC 10/25 are from Holger Schurig, with ideas from an unmerged
31 * driver from Marius Vollmer
32 *
33 *****************************************************************************/
34
35//#define DEBUG
36
37#include <linux/kernel.h>
38#include <linux/slab.h>
39#include <linux/input.h>
40#include <linux/module.h>
41#include <linux/usb.h>
42#include <linux/usb/input.h>
43#include <linux/hid.h>
44#include <linux/mutex.h>
45
46static bool swap_xy;
47module_param(swap_xy, bool, 0644);
48MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");
49
50static bool hwcalib_xy;
51module_param(hwcalib_xy, bool, 0644);
52MODULE_PARM_DESC(hwcalib_xy, "If set hw-calibrated X/Y are used if available");
53
54/* device specifc data/functions */
55struct usbtouch_usb;
56struct usbtouch_device_info {
57 int min_xc, max_xc;
58 int min_yc, max_yc;
59 int min_press, max_press;
60 int rept_size;
61
62 /*
63 * Always service the USB devices irq not just when the input device is
64 * open. This is useful when devices have a watchdog which prevents us
65 * from periodically polling the device. Leave this unset unless your
66 * touchscreen device requires it, as it does consume more of the USB
67 * bandwidth.
68 */
69 bool irq_always;
70
71 void (*process_pkt) (struct usbtouch_usb *usbtouch, unsigned char *pkt, int len);
72
73 /*
74 * used to get the packet len. possible return values:
75 * > 0: packet len
76 * = 0: skip one byte
77 * < 0: -return value more bytes needed
78 */
79 int (*get_pkt_len) (unsigned char *pkt, int len);
80
81 int (*read_data) (struct usbtouch_usb *usbtouch, unsigned char *pkt);
82 int (*alloc) (struct usbtouch_usb *usbtouch);
83 int (*init) (struct usbtouch_usb *usbtouch);
84 void (*exit) (struct usbtouch_usb *usbtouch);
85};
86
87/* a usbtouch device */
88struct usbtouch_usb {
89 unsigned char *data;
90 dma_addr_t data_dma;
91 int data_size;
92 unsigned char *buffer;
93 int buf_len;
94 struct urb *irq;
95 struct usb_interface *interface;
96 struct input_dev *input;
97 struct usbtouch_device_info *type;
98 struct mutex pm_mutex; /* serialize access to open/suspend */
99 bool is_open;
100 char name[128];
101 char phys[64];
102 void *priv;
103
104 int x, y;
105 int touch, press;
106};
107
108
109/* device types */
110enum {
111 DEVTYPE_IGNORE = -1,
112 DEVTYPE_EGALAX,
113 DEVTYPE_PANJIT,
114 DEVTYPE_3M,
115 DEVTYPE_ITM,
116 DEVTYPE_ETURBO,
117 DEVTYPE_GUNZE,
118 DEVTYPE_DMC_TSC10,
119 DEVTYPE_IRTOUCH,
120 DEVTYPE_IRTOUCH_HIRES,
121 DEVTYPE_IDEALTEK,
122 DEVTYPE_GENERAL_TOUCH,
123 DEVTYPE_GOTOP,
124 DEVTYPE_JASTEC,
125 DEVTYPE_E2I,
126 DEVTYPE_ZYTRONIC,
127 DEVTYPE_TC45USB,
128 DEVTYPE_NEXIO,
129 DEVTYPE_ELO,
130 DEVTYPE_ETOUCH,
131};
132
133#define USB_DEVICE_HID_CLASS(vend, prod) \
134 .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS \
135 | USB_DEVICE_ID_MATCH_DEVICE, \
136 .idVendor = (vend), \
137 .idProduct = (prod), \
138 .bInterfaceClass = USB_INTERFACE_CLASS_HID
139
140static const struct usb_device_id usbtouch_devices[] = {
141#ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
142 /* ignore the HID capable devices, handled by usbhid */
143 {USB_DEVICE_HID_CLASS(0x0eef, 0x0001), .driver_info = DEVTYPE_IGNORE},
144 {USB_DEVICE_HID_CLASS(0x0eef, 0x0002), .driver_info = DEVTYPE_IGNORE},
145
146 /* normal device IDs */
147 {USB_DEVICE(0x3823, 0x0001), .driver_info = DEVTYPE_EGALAX},
148 {USB_DEVICE(0x3823, 0x0002), .driver_info = DEVTYPE_EGALAX},
149 {USB_DEVICE(0x0123, 0x0001), .driver_info = DEVTYPE_EGALAX},
150 {USB_DEVICE(0x0eef, 0x0001), .driver_info = DEVTYPE_EGALAX},
151 {USB_DEVICE(0x0eef, 0x0002), .driver_info = DEVTYPE_EGALAX},
152 {USB_DEVICE(0x1234, 0x0001), .driver_info = DEVTYPE_EGALAX},
153 {USB_DEVICE(0x1234, 0x0002), .driver_info = DEVTYPE_EGALAX},
154#endif
155
156#ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
157 {USB_DEVICE(0x134c, 0x0001), .driver_info = DEVTYPE_PANJIT},
158 {USB_DEVICE(0x134c, 0x0002), .driver_info = DEVTYPE_PANJIT},
159 {USB_DEVICE(0x134c, 0x0003), .driver_info = DEVTYPE_PANJIT},
160 {USB_DEVICE(0x134c, 0x0004), .driver_info = DEVTYPE_PANJIT},
161#endif
162
163#ifdef CONFIG_TOUCHSCREEN_USB_3M
164 {USB_DEVICE(0x0596, 0x0001), .driver_info = DEVTYPE_3M},
165#endif
166
167#ifdef CONFIG_TOUCHSCREEN_USB_ITM
168 {USB_DEVICE(0x0403, 0xf9e9), .driver_info = DEVTYPE_ITM},
169 {USB_DEVICE(0x16e3, 0xf9e9), .driver_info = DEVTYPE_ITM},
170#endif
171
172#ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
173 {USB_DEVICE(0x1234, 0x5678), .driver_info = DEVTYPE_ETURBO},
174#endif
175
176#ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
177 {USB_DEVICE(0x0637, 0x0001), .driver_info = DEVTYPE_GUNZE},
178#endif
179
180#ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
181 {USB_DEVICE(0x0afa, 0x03e8), .driver_info = DEVTYPE_DMC_TSC10},
182#endif
183
184#ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
185 {USB_DEVICE(0x595a, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
186 {USB_DEVICE(0x6615, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
187 {USB_DEVICE(0x6615, 0x0012), .driver_info = DEVTYPE_IRTOUCH_HIRES},
188#endif
189
190#ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
191 {USB_DEVICE(0x1391, 0x1000), .driver_info = DEVTYPE_IDEALTEK},
192#endif
193
194#ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
195 {USB_DEVICE(0x0dfc, 0x0001), .driver_info = DEVTYPE_GENERAL_TOUCH},
196#endif
197
198#ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
199 {USB_DEVICE(0x08f2, 0x007f), .driver_info = DEVTYPE_GOTOP},
200 {USB_DEVICE(0x08f2, 0x00ce), .driver_info = DEVTYPE_GOTOP},
201 {USB_DEVICE(0x08f2, 0x00f4), .driver_info = DEVTYPE_GOTOP},
202#endif
203
204#ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
205 {USB_DEVICE(0x0f92, 0x0001), .driver_info = DEVTYPE_JASTEC},
206#endif
207
208#ifdef CONFIG_TOUCHSCREEN_USB_E2I
209 {USB_DEVICE(0x1ac7, 0x0001), .driver_info = DEVTYPE_E2I},
210#endif
211
212#ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
213 {USB_DEVICE(0x14c8, 0x0003), .driver_info = DEVTYPE_ZYTRONIC},
214#endif
215
216#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
217 /* TC5UH */
218 {USB_DEVICE(0x0664, 0x0309), .driver_info = DEVTYPE_TC45USB},
219 /* TC4UM */
220 {USB_DEVICE(0x0664, 0x0306), .driver_info = DEVTYPE_TC45USB},
221#endif
222
223#ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
224 /* data interface only */
225 {USB_DEVICE_AND_INTERFACE_INFO(0x10f0, 0x2002, 0x0a, 0x00, 0x00),
226 .driver_info = DEVTYPE_NEXIO},
227 {USB_DEVICE_AND_INTERFACE_INFO(0x1870, 0x0001, 0x0a, 0x00, 0x00),
228 .driver_info = DEVTYPE_NEXIO},
229#endif
230
231#ifdef CONFIG_TOUCHSCREEN_USB_ELO
232 {USB_DEVICE(0x04e7, 0x0020), .driver_info = DEVTYPE_ELO},
233#endif
234
235#ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
236 {USB_DEVICE(0x7374, 0x0001), .driver_info = DEVTYPE_ETOUCH},
237#endif
238
239 {}
240};
241
242
243/*****************************************************************************
244 * e2i Part
245 */
246
247#ifdef CONFIG_TOUCHSCREEN_USB_E2I
248static int e2i_init(struct usbtouch_usb *usbtouch)
249{
250 int ret;
251 struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
252
253 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
254 0x01, 0x02, 0x0000, 0x0081,
255 NULL, 0, USB_CTRL_SET_TIMEOUT);
256
257 dev_dbg(&usbtouch->interface->dev,
258 "%s - usb_control_msg - E2I_RESET - bytes|err: %d\n",
259 __func__, ret);
260 return ret;
261}
262
263static int e2i_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
264{
265 int tmp = (pkt[0] << 8) | pkt[1];
266 dev->x = (pkt[2] << 8) | pkt[3];
267 dev->y = (pkt[4] << 8) | pkt[5];
268
269 tmp = tmp - 0xA000;
270 dev->touch = (tmp > 0);
271 dev->press = (tmp > 0 ? tmp : 0);
272
273 return 1;
274}
275#endif
276
277
278/*****************************************************************************
279 * eGalax part
280 */
281
282#ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
283
284#ifndef MULTI_PACKET
285#define MULTI_PACKET
286#endif
287
288#define EGALAX_PKT_TYPE_MASK 0xFE
289#define EGALAX_PKT_TYPE_REPT 0x80
290#define EGALAX_PKT_TYPE_DIAG 0x0A
291
292static int egalax_init(struct usbtouch_usb *usbtouch)
293{
294 int ret, i;
295 unsigned char *buf;
296 struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
297
298 /*
299 * An eGalax diagnostic packet kicks the device into using the right
300 * protocol. We send a "check active" packet. The response will be
301 * read later and ignored.
302 */
303
304 buf = kmalloc(3, GFP_KERNEL);
305 if (!buf)
306 return -ENOMEM;
307
308 buf[0] = EGALAX_PKT_TYPE_DIAG;
309 buf[1] = 1; /* length */
310 buf[2] = 'A'; /* command - check active */
311
312 for (i = 0; i < 3; i++) {
313 ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
314 0,
315 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
316 0, 0, buf, 3,
317 USB_CTRL_SET_TIMEOUT);
318 if (ret >= 0) {
319 ret = 0;
320 break;
321 }
322 if (ret != -EPIPE)
323 break;
324 }
325
326 kfree(buf);
327
328 return ret;
329}
330
331static int egalax_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
332{
333 if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT)
334 return 0;
335
336 dev->x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F);
337 dev->y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F);
338 dev->touch = pkt[0] & 0x01;
339
340 return 1;
341}
342
343static int egalax_get_pkt_len(unsigned char *buf, int len)
344{
345 switch (buf[0] & EGALAX_PKT_TYPE_MASK) {
346 case EGALAX_PKT_TYPE_REPT:
347 return 5;
348
349 case EGALAX_PKT_TYPE_DIAG:
350 if (len < 2)
351 return -1;
352
353 return buf[1] + 2;
354 }
355
356 return 0;
357}
358#endif
359
360/*****************************************************************************
361 * EasyTouch part
362 */
363
364#ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
365
366#ifndef MULTI_PACKET
367#define MULTI_PACKET
368#endif
369
370#define ETOUCH_PKT_TYPE_MASK 0xFE
371#define ETOUCH_PKT_TYPE_REPT 0x80
372#define ETOUCH_PKT_TYPE_REPT2 0xB0
373#define ETOUCH_PKT_TYPE_DIAG 0x0A
374
375static int etouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
376{
377 if ((pkt[0] & ETOUCH_PKT_TYPE_MASK) != ETOUCH_PKT_TYPE_REPT &&
378 (pkt[0] & ETOUCH_PKT_TYPE_MASK) != ETOUCH_PKT_TYPE_REPT2)
379 return 0;
380
381 dev->x = ((pkt[1] & 0x1F) << 7) | (pkt[2] & 0x7F);
382 dev->y = ((pkt[3] & 0x1F) << 7) | (pkt[4] & 0x7F);
383 dev->touch = pkt[0] & 0x01;
384
385 return 1;
386}
387
388static int etouch_get_pkt_len(unsigned char *buf, int len)
389{
390 switch (buf[0] & ETOUCH_PKT_TYPE_MASK) {
391 case ETOUCH_PKT_TYPE_REPT:
392 case ETOUCH_PKT_TYPE_REPT2:
393 return 5;
394
395 case ETOUCH_PKT_TYPE_DIAG:
396 if (len < 2)
397 return -1;
398
399 return buf[1] + 2;
400 }
401
402 return 0;
403}
404#endif
405
406/*****************************************************************************
407 * PanJit Part
408 */
409#ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
410static int panjit_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
411{
412 dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
413 dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
414 dev->touch = pkt[0] & 0x01;
415
416 return 1;
417}
418#endif
419
420
421/*****************************************************************************
422 * 3M/Microtouch Part
423 */
424#ifdef CONFIG_TOUCHSCREEN_USB_3M
425
426#define MTOUCHUSB_ASYNC_REPORT 1
427#define MTOUCHUSB_RESET 7
428#define MTOUCHUSB_REQ_CTRLLR_ID 10
429
430#define MTOUCHUSB_REQ_CTRLLR_ID_LEN 16
431
432static int mtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
433{
434 if (hwcalib_xy) {
435 dev->x = (pkt[4] << 8) | pkt[3];
436 dev->y = 0xffff - ((pkt[6] << 8) | pkt[5]);
437 } else {
438 dev->x = (pkt[8] << 8) | pkt[7];
439 dev->y = (pkt[10] << 8) | pkt[9];
440 }
441 dev->touch = (pkt[2] & 0x40) ? 1 : 0;
442
443 return 1;
444}
445
446struct mtouch_priv {
447 u8 fw_rev_major;
448 u8 fw_rev_minor;
449};
450
451static ssize_t mtouch_firmware_rev_show(struct device *dev,
452 struct device_attribute *attr, char *output)
453{
454 struct usb_interface *intf = to_usb_interface(dev);
455 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
456 struct mtouch_priv *priv = usbtouch->priv;
457
458 return scnprintf(output, PAGE_SIZE, "%1x.%1x\n",
459 priv->fw_rev_major, priv->fw_rev_minor);
460}
461static DEVICE_ATTR(firmware_rev, 0444, mtouch_firmware_rev_show, NULL);
462
463static struct attribute *mtouch_attrs[] = {
464 &dev_attr_firmware_rev.attr,
465 NULL
466};
467
468static const struct attribute_group mtouch_attr_group = {
469 .attrs = mtouch_attrs,
470};
471
472static int mtouch_get_fw_revision(struct usbtouch_usb *usbtouch)
473{
474 struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
475 struct mtouch_priv *priv = usbtouch->priv;
476 u8 *buf;
477 int ret;
478
479 buf = kzalloc(MTOUCHUSB_REQ_CTRLLR_ID_LEN, GFP_NOIO);
480 if (!buf)
481 return -ENOMEM;
482
483 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
484 MTOUCHUSB_REQ_CTRLLR_ID,
485 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
486 0, 0, buf, MTOUCHUSB_REQ_CTRLLR_ID_LEN,
487 USB_CTRL_SET_TIMEOUT);
488 if (ret != MTOUCHUSB_REQ_CTRLLR_ID_LEN) {
489 dev_warn(&usbtouch->interface->dev,
490 "Failed to read FW rev: %d\n", ret);
491 ret = ret < 0 ? ret : -EIO;
492 goto free;
493 }
494
495 priv->fw_rev_major = buf[3];
496 priv->fw_rev_minor = buf[4];
497
498 ret = 0;
499
500free:
501 kfree(buf);
502 return ret;
503}
504
505static int mtouch_alloc(struct usbtouch_usb *usbtouch)
506{
507 int ret;
508
509 usbtouch->priv = kmalloc(sizeof(struct mtouch_priv), GFP_KERNEL);
510 if (!usbtouch->priv)
511 return -ENOMEM;
512
513 ret = sysfs_create_group(&usbtouch->interface->dev.kobj,
514 &mtouch_attr_group);
515 if (ret) {
516 kfree(usbtouch->priv);
517 usbtouch->priv = NULL;
518 return ret;
519 }
520
521 return 0;
522}
523
524static int mtouch_init(struct usbtouch_usb *usbtouch)
525{
526 int ret, i;
527 struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
528
529 ret = mtouch_get_fw_revision(usbtouch);
530 if (ret)
531 return ret;
532
533 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
534 MTOUCHUSB_RESET,
535 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
536 1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
537 dev_dbg(&usbtouch->interface->dev,
538 "%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d\n",
539 __func__, ret);
540 if (ret < 0)
541 return ret;
542 msleep(150);
543
544 for (i = 0; i < 3; i++) {
545 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
546 MTOUCHUSB_ASYNC_REPORT,
547 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
548 1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT);
549 dev_dbg(&usbtouch->interface->dev,
550 "%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d\n",
551 __func__, ret);
552 if (ret >= 0)
553 break;
554 if (ret != -EPIPE)
555 return ret;
556 }
557
558 /* Default min/max xy are the raw values, override if using hw-calib */
559 if (hwcalib_xy) {
560 input_set_abs_params(usbtouch->input, ABS_X, 0, 0xffff, 0, 0);
561 input_set_abs_params(usbtouch->input, ABS_Y, 0, 0xffff, 0, 0);
562 }
563
564 return 0;
565}
566
567static void mtouch_exit(struct usbtouch_usb *usbtouch)
568{
569 struct mtouch_priv *priv = usbtouch->priv;
570
571 sysfs_remove_group(&usbtouch->interface->dev.kobj, &mtouch_attr_group);
572 kfree(priv);
573}
574#endif
575
576
577/*****************************************************************************
578 * ITM Part
579 */
580#ifdef CONFIG_TOUCHSCREEN_USB_ITM
581static int itm_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
582{
583 int touch;
584 /*
585 * ITM devices report invalid x/y data if not touched.
586 * if the screen was touched before but is not touched any more
587 * report touch as 0 with the last valid x/y data once. then stop
588 * reporting data until touched again.
589 */
590 dev->press = ((pkt[2] & 0x01) << 7) | (pkt[5] & 0x7F);
591
592 touch = ~pkt[7] & 0x20;
593 if (!touch) {
594 if (dev->touch) {
595 dev->touch = 0;
596 return 1;
597 }
598
599 return 0;
600 }
601
602 dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F);
603 dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F);
604 dev->touch = touch;
605
606 return 1;
607}
608#endif
609
610
611/*****************************************************************************
612 * eTurboTouch part
613 */
614#ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
615#ifndef MULTI_PACKET
616#define MULTI_PACKET
617#endif
618static int eturbo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
619{
620 unsigned int shift;
621
622 /* packets should start with sync */
623 if (!(pkt[0] & 0x80))
624 return 0;
625
626 shift = (6 - (pkt[0] & 0x03));
627 dev->x = ((pkt[3] << 7) | pkt[4]) >> shift;
628 dev->y = ((pkt[1] << 7) | pkt[2]) >> shift;
629 dev->touch = (pkt[0] & 0x10) ? 1 : 0;
630
631 return 1;
632}
633
634static int eturbo_get_pkt_len(unsigned char *buf, int len)
635{
636 if (buf[0] & 0x80)
637 return 5;
638 if (buf[0] == 0x01)
639 return 3;
640 return 0;
641}
642#endif
643
644
645/*****************************************************************************
646 * Gunze part
647 */
648#ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
649static int gunze_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
650{
651 if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80))
652 return 0;
653
654 dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F);
655 dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F);
656 dev->touch = pkt[0] & 0x20;
657
658 return 1;
659}
660#endif
661
662/*****************************************************************************
663 * DMC TSC-10/25 Part
664 *
665 * Documentation about the controller and it's protocol can be found at
666 * http://www.dmccoltd.com/files/controler/tsc10usb_pi_e.pdf
667 * http://www.dmccoltd.com/files/controler/tsc25_usb_e.pdf
668 */
669#ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
670
671/* supported data rates. currently using 130 */
672#define TSC10_RATE_POINT 0x50
673#define TSC10_RATE_30 0x40
674#define TSC10_RATE_50 0x41
675#define TSC10_RATE_80 0x42
676#define TSC10_RATE_100 0x43
677#define TSC10_RATE_130 0x44
678#define TSC10_RATE_150 0x45
679
680/* commands */
681#define TSC10_CMD_RESET 0x55
682#define TSC10_CMD_RATE 0x05
683#define TSC10_CMD_DATA1 0x01
684
685static int dmc_tsc10_init(struct usbtouch_usb *usbtouch)
686{
687 struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
688 int ret = -ENOMEM;
689 unsigned char *buf;
690
691 buf = kmalloc(2, GFP_NOIO);
692 if (!buf)
693 goto err_nobuf;
694 /* reset */
695 buf[0] = buf[1] = 0xFF;
696 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
697 TSC10_CMD_RESET,
698 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
699 0, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
700 if (ret < 0)
701 goto err_out;
702 if (buf[0] != 0x06) {
703 ret = -ENODEV;
704 goto err_out;
705 }
706
707 /* TSC-25 data sheet specifies a delay after the RESET command */
708 msleep(150);
709
710 /* set coordinate output rate */
711 buf[0] = buf[1] = 0xFF;
712 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
713 TSC10_CMD_RATE,
714 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
715 TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
716 if (ret < 0)
717 goto err_out;
718 if ((buf[0] != 0x06) && (buf[0] != 0x15 || buf[1] != 0x01)) {
719 ret = -ENODEV;
720 goto err_out;
721 }
722
723 /* start sending data */
724 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
725 TSC10_CMD_DATA1,
726 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
727 0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
728err_out:
729 kfree(buf);
730err_nobuf:
731 return ret;
732}
733
734
735static int dmc_tsc10_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
736{
737 dev->x = ((pkt[2] & 0x03) << 8) | pkt[1];
738 dev->y = ((pkt[4] & 0x03) << 8) | pkt[3];
739 dev->touch = pkt[0] & 0x01;
740
741 return 1;
742}
743#endif
744
745
746/*****************************************************************************
747 * IRTOUCH Part
748 */
749#ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
750static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
751{
752 dev->x = (pkt[3] << 8) | pkt[2];
753 dev->y = (pkt[5] << 8) | pkt[4];
754 dev->touch = (pkt[1] & 0x03) ? 1 : 0;
755
756 return 1;
757}
758#endif
759
760/*****************************************************************************
761 * ET&T TC5UH/TC4UM part
762 */
763#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
764static int tc45usb_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
765{
766 dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
767 dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
768 dev->touch = pkt[0] & 0x01;
769
770 return 1;
771}
772#endif
773
774/*****************************************************************************
775 * IdealTEK URTC1000 Part
776 */
777#ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
778#ifndef MULTI_PACKET
779#define MULTI_PACKET
780#endif
781static int idealtek_get_pkt_len(unsigned char *buf, int len)
782{
783 if (buf[0] & 0x80)
784 return 5;
785 if (buf[0] == 0x01)
786 return len;
787 return 0;
788}
789
790static int idealtek_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
791{
792 switch (pkt[0] & 0x98) {
793 case 0x88:
794 /* touch data in IdealTEK mode */
795 dev->x = (pkt[1] << 5) | (pkt[2] >> 2);
796 dev->y = (pkt[3] << 5) | (pkt[4] >> 2);
797 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
798 return 1;
799
800 case 0x98:
801 /* touch data in MT emulation mode */
802 dev->x = (pkt[2] << 5) | (pkt[1] >> 2);
803 dev->y = (pkt[4] << 5) | (pkt[3] >> 2);
804 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
805 return 1;
806
807 default:
808 return 0;
809 }
810}
811#endif
812
813/*****************************************************************************
814 * General Touch Part
815 */
816#ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
817static int general_touch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
818{
819 dev->x = (pkt[2] << 8) | pkt[1];
820 dev->y = (pkt[4] << 8) | pkt[3];
821 dev->press = pkt[5] & 0xff;
822 dev->touch = pkt[0] & 0x01;
823
824 return 1;
825}
826#endif
827
828/*****************************************************************************
829 * GoTop Part
830 */
831#ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
832static int gotop_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
833{
834 dev->x = ((pkt[1] & 0x38) << 4) | pkt[2];
835 dev->y = ((pkt[1] & 0x07) << 7) | pkt[3];
836 dev->touch = pkt[0] & 0x01;
837
838 return 1;
839}
840#endif
841
842/*****************************************************************************
843 * JASTEC Part
844 */
845#ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
846static int jastec_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
847{
848 dev->x = ((pkt[0] & 0x3f) << 6) | (pkt[2] & 0x3f);
849 dev->y = ((pkt[1] & 0x3f) << 6) | (pkt[3] & 0x3f);
850 dev->touch = (pkt[0] & 0x40) >> 6;
851
852 return 1;
853}
854#endif
855
856/*****************************************************************************
857 * Zytronic Part
858 */
859#ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
860static int zytronic_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
861{
862 struct usb_interface *intf = dev->interface;
863
864 switch (pkt[0]) {
865 case 0x3A: /* command response */
866 dev_dbg(&intf->dev, "%s: Command response %d\n", __func__, pkt[1]);
867 break;
868
869 case 0xC0: /* down */
870 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
871 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
872 dev->touch = 1;
873 dev_dbg(&intf->dev, "%s: down %d,%d\n", __func__, dev->x, dev->y);
874 return 1;
875
876 case 0x80: /* up */
877 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
878 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
879 dev->touch = 0;
880 dev_dbg(&intf->dev, "%s: up %d,%d\n", __func__, dev->x, dev->y);
881 return 1;
882
883 default:
884 dev_dbg(&intf->dev, "%s: Unknown return %d\n", __func__, pkt[0]);
885 break;
886 }
887
888 return 0;
889}
890#endif
891
892/*****************************************************************************
893 * NEXIO Part
894 */
895#ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
896
897#define NEXIO_TIMEOUT 5000
898#define NEXIO_BUFSIZE 1024
899#define NEXIO_THRESHOLD 50
900
901struct nexio_priv {
902 struct urb *ack;
903 unsigned char *ack_buf;
904};
905
906struct nexio_touch_packet {
907 u8 flags; /* 0xe1 = touch, 0xe1 = release */
908 __be16 data_len; /* total bytes of touch data */
909 __be16 x_len; /* bytes for X axis */
910 __be16 y_len; /* bytes for Y axis */
911 u8 data[];
912} __attribute__ ((packed));
913
914static unsigned char nexio_ack_pkt[2] = { 0xaa, 0x02 };
915static unsigned char nexio_init_pkt[4] = { 0x82, 0x04, 0x0a, 0x0f };
916
917static void nexio_ack_complete(struct urb *urb)
918{
919}
920
921static int nexio_alloc(struct usbtouch_usb *usbtouch)
922{
923 struct nexio_priv *priv;
924 int ret = -ENOMEM;
925
926 usbtouch->priv = kmalloc(sizeof(struct nexio_priv), GFP_KERNEL);
927 if (!usbtouch->priv)
928 goto out_buf;
929
930 priv = usbtouch->priv;
931
932 priv->ack_buf = kmemdup(nexio_ack_pkt, sizeof(nexio_ack_pkt),
933 GFP_KERNEL);
934 if (!priv->ack_buf)
935 goto err_priv;
936
937 priv->ack = usb_alloc_urb(0, GFP_KERNEL);
938 if (!priv->ack) {
939 dev_dbg(&usbtouch->interface->dev,
940 "%s - usb_alloc_urb failed: usbtouch->ack\n", __func__);
941 goto err_ack_buf;
942 }
943
944 return 0;
945
946err_ack_buf:
947 kfree(priv->ack_buf);
948err_priv:
949 kfree(priv);
950out_buf:
951 return ret;
952}
953
954static int nexio_init(struct usbtouch_usb *usbtouch)
955{
956 struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
957 struct usb_host_interface *interface = usbtouch->interface->cur_altsetting;
958 struct nexio_priv *priv = usbtouch->priv;
959 int ret = -ENOMEM;
960 int actual_len, i;
961 unsigned char *buf;
962 char *firmware_ver = NULL, *device_name = NULL;
963 int input_ep = 0, output_ep = 0;
964
965 /* find first input and output endpoint */
966 for (i = 0; i < interface->desc.bNumEndpoints; i++) {
967 if (!input_ep &&
968 usb_endpoint_dir_in(&interface->endpoint[i].desc))
969 input_ep = interface->endpoint[i].desc.bEndpointAddress;
970 if (!output_ep &&
971 usb_endpoint_dir_out(&interface->endpoint[i].desc))
972 output_ep = interface->endpoint[i].desc.bEndpointAddress;
973 }
974 if (!input_ep || !output_ep)
975 return -ENXIO;
976
977 buf = kmalloc(NEXIO_BUFSIZE, GFP_NOIO);
978 if (!buf)
979 goto out_buf;
980
981 /* two empty reads */
982 for (i = 0; i < 2; i++) {
983 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
984 buf, NEXIO_BUFSIZE, &actual_len,
985 NEXIO_TIMEOUT);
986 if (ret < 0)
987 goto out_buf;
988 }
989
990 /* send init command */
991 memcpy(buf, nexio_init_pkt, sizeof(nexio_init_pkt));
992 ret = usb_bulk_msg(dev, usb_sndbulkpipe(dev, output_ep),
993 buf, sizeof(nexio_init_pkt), &actual_len,
994 NEXIO_TIMEOUT);
995 if (ret < 0)
996 goto out_buf;
997
998 /* read replies */
999 for (i = 0; i < 3; i++) {
1000 memset(buf, 0, NEXIO_BUFSIZE);
1001 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
1002 buf, NEXIO_BUFSIZE, &actual_len,
1003 NEXIO_TIMEOUT);
1004 if (ret < 0 || actual_len < 1 || buf[1] != actual_len)
1005 continue;
1006 switch (buf[0]) {
1007 case 0x83: /* firmware version */
1008 if (!firmware_ver)
1009 firmware_ver = kstrdup(&buf[2], GFP_NOIO);
1010 break;
1011 case 0x84: /* device name */
1012 if (!device_name)
1013 device_name = kstrdup(&buf[2], GFP_NOIO);
1014 break;
1015 }
1016 }
1017
1018 printk(KERN_INFO "Nexio device: %s, firmware version: %s\n",
1019 device_name, firmware_ver);
1020
1021 kfree(firmware_ver);
1022 kfree(device_name);
1023
1024 usb_fill_bulk_urb(priv->ack, dev, usb_sndbulkpipe(dev, output_ep),
1025 priv->ack_buf, sizeof(nexio_ack_pkt),
1026 nexio_ack_complete, usbtouch);
1027 ret = 0;
1028
1029out_buf:
1030 kfree(buf);
1031 return ret;
1032}
1033
1034static void nexio_exit(struct usbtouch_usb *usbtouch)
1035{
1036 struct nexio_priv *priv = usbtouch->priv;
1037
1038 usb_kill_urb(priv->ack);
1039 usb_free_urb(priv->ack);
1040 kfree(priv->ack_buf);
1041 kfree(priv);
1042}
1043
1044static int nexio_read_data(struct usbtouch_usb *usbtouch, unsigned char *pkt)
1045{
1046 struct nexio_touch_packet *packet = (void *) pkt;
1047 struct nexio_priv *priv = usbtouch->priv;
1048 unsigned int data_len = be16_to_cpu(packet->data_len);
1049 unsigned int x_len = be16_to_cpu(packet->x_len);
1050 unsigned int y_len = be16_to_cpu(packet->y_len);
1051 int x, y, begin_x, begin_y, end_x, end_y, w, h, ret;
1052
1053 /* got touch data? */
1054 if ((pkt[0] & 0xe0) != 0xe0)
1055 return 0;
1056
1057 if (data_len > 0xff)
1058 data_len -= 0x100;
1059 if (x_len > 0xff)
1060 x_len -= 0x80;
1061
1062 /* send ACK */
1063 ret = usb_submit_urb(priv->ack, GFP_ATOMIC);
1064
1065 if (!usbtouch->type->max_xc) {
1066 usbtouch->type->max_xc = 2 * x_len;
1067 input_set_abs_params(usbtouch->input, ABS_X,
1068 0, usbtouch->type->max_xc, 0, 0);
1069 usbtouch->type->max_yc = 2 * y_len;
1070 input_set_abs_params(usbtouch->input, ABS_Y,
1071 0, usbtouch->type->max_yc, 0, 0);
1072 }
1073 /*
1074 * The device reports state of IR sensors on X and Y axes.
1075 * Each byte represents "darkness" percentage (0-100) of one element.
1076 * 17" touchscreen reports only 64 x 52 bytes so the resolution is low.
1077 * This also means that there's a limited multi-touch capability but
1078 * it's disabled (and untested) here as there's no X driver for that.
1079 */
1080 begin_x = end_x = begin_y = end_y = -1;
1081 for (x = 0; x < x_len; x++) {
1082 if (begin_x == -1 && packet->data[x] > NEXIO_THRESHOLD) {
1083 begin_x = x;
1084 continue;
1085 }
1086 if (end_x == -1 && begin_x != -1 && packet->data[x] < NEXIO_THRESHOLD) {
1087 end_x = x - 1;
1088 for (y = x_len; y < data_len; y++) {
1089 if (begin_y == -1 && packet->data[y] > NEXIO_THRESHOLD) {
1090 begin_y = y - x_len;
1091 continue;
1092 }
1093 if (end_y == -1 &&
1094 begin_y != -1 && packet->data[y] < NEXIO_THRESHOLD) {
1095 end_y = y - 1 - x_len;
1096 w = end_x - begin_x;
1097 h = end_y - begin_y;
1098#if 0
1099 /* multi-touch */
1100 input_report_abs(usbtouch->input,
1101 ABS_MT_TOUCH_MAJOR, max(w,h));
1102 input_report_abs(usbtouch->input,
1103 ABS_MT_TOUCH_MINOR, min(x,h));
1104 input_report_abs(usbtouch->input,
1105 ABS_MT_POSITION_X, 2*begin_x+w);
1106 input_report_abs(usbtouch->input,
1107 ABS_MT_POSITION_Y, 2*begin_y+h);
1108 input_report_abs(usbtouch->input,
1109 ABS_MT_ORIENTATION, w > h);
1110 input_mt_sync(usbtouch->input);
1111#endif
1112 /* single touch */
1113 usbtouch->x = 2 * begin_x + w;
1114 usbtouch->y = 2 * begin_y + h;
1115 usbtouch->touch = packet->flags & 0x01;
1116 begin_y = end_y = -1;
1117 return 1;
1118 }
1119 }
1120 begin_x = end_x = -1;
1121 }
1122
1123 }
1124 return 0;
1125}
1126#endif
1127
1128
1129/*****************************************************************************
1130 * ELO part
1131 */
1132
1133#ifdef CONFIG_TOUCHSCREEN_USB_ELO
1134
1135static int elo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
1136{
1137 dev->x = (pkt[3] << 8) | pkt[2];
1138 dev->y = (pkt[5] << 8) | pkt[4];
1139 dev->touch = pkt[6] > 0;
1140 dev->press = pkt[6];
1141
1142 return 1;
1143}
1144#endif
1145
1146
1147/*****************************************************************************
1148 * the different device descriptors
1149 */
1150#ifdef MULTI_PACKET
1151static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1152 unsigned char *pkt, int len);
1153#endif
1154
1155static struct usbtouch_device_info usbtouch_dev_info[] = {
1156#ifdef CONFIG_TOUCHSCREEN_USB_ELO
1157 [DEVTYPE_ELO] = {
1158 .min_xc = 0x0,
1159 .max_xc = 0x0fff,
1160 .min_yc = 0x0,
1161 .max_yc = 0x0fff,
1162 .max_press = 0xff,
1163 .rept_size = 8,
1164 .read_data = elo_read_data,
1165 },
1166#endif
1167
1168#ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
1169 [DEVTYPE_EGALAX] = {
1170 .min_xc = 0x0,
1171 .max_xc = 0x07ff,
1172 .min_yc = 0x0,
1173 .max_yc = 0x07ff,
1174 .rept_size = 16,
1175 .process_pkt = usbtouch_process_multi,
1176 .get_pkt_len = egalax_get_pkt_len,
1177 .read_data = egalax_read_data,
1178 .init = egalax_init,
1179 },
1180#endif
1181
1182#ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
1183 [DEVTYPE_PANJIT] = {
1184 .min_xc = 0x0,
1185 .max_xc = 0x0fff,
1186 .min_yc = 0x0,
1187 .max_yc = 0x0fff,
1188 .rept_size = 8,
1189 .read_data = panjit_read_data,
1190 },
1191#endif
1192
1193#ifdef CONFIG_TOUCHSCREEN_USB_3M
1194 [DEVTYPE_3M] = {
1195 .min_xc = 0x0,
1196 .max_xc = 0x4000,
1197 .min_yc = 0x0,
1198 .max_yc = 0x4000,
1199 .rept_size = 11,
1200 .read_data = mtouch_read_data,
1201 .alloc = mtouch_alloc,
1202 .init = mtouch_init,
1203 .exit = mtouch_exit,
1204 },
1205#endif
1206
1207#ifdef CONFIG_TOUCHSCREEN_USB_ITM
1208 [DEVTYPE_ITM] = {
1209 .min_xc = 0x0,
1210 .max_xc = 0x0fff,
1211 .min_yc = 0x0,
1212 .max_yc = 0x0fff,
1213 .max_press = 0xff,
1214 .rept_size = 8,
1215 .read_data = itm_read_data,
1216 },
1217#endif
1218
1219#ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
1220 [DEVTYPE_ETURBO] = {
1221 .min_xc = 0x0,
1222 .max_xc = 0x07ff,
1223 .min_yc = 0x0,
1224 .max_yc = 0x07ff,
1225 .rept_size = 8,
1226 .process_pkt = usbtouch_process_multi,
1227 .get_pkt_len = eturbo_get_pkt_len,
1228 .read_data = eturbo_read_data,
1229 },
1230#endif
1231
1232#ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
1233 [DEVTYPE_GUNZE] = {
1234 .min_xc = 0x0,
1235 .max_xc = 0x0fff,
1236 .min_yc = 0x0,
1237 .max_yc = 0x0fff,
1238 .rept_size = 4,
1239 .read_data = gunze_read_data,
1240 },
1241#endif
1242
1243#ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
1244 [DEVTYPE_DMC_TSC10] = {
1245 .min_xc = 0x0,
1246 .max_xc = 0x03ff,
1247 .min_yc = 0x0,
1248 .max_yc = 0x03ff,
1249 .rept_size = 5,
1250 .init = dmc_tsc10_init,
1251 .read_data = dmc_tsc10_read_data,
1252 },
1253#endif
1254
1255#ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
1256 [DEVTYPE_IRTOUCH] = {
1257 .min_xc = 0x0,
1258 .max_xc = 0x0fff,
1259 .min_yc = 0x0,
1260 .max_yc = 0x0fff,
1261 .rept_size = 8,
1262 .read_data = irtouch_read_data,
1263 },
1264
1265 [DEVTYPE_IRTOUCH_HIRES] = {
1266 .min_xc = 0x0,
1267 .max_xc = 0x7fff,
1268 .min_yc = 0x0,
1269 .max_yc = 0x7fff,
1270 .rept_size = 8,
1271 .read_data = irtouch_read_data,
1272 },
1273#endif
1274
1275#ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
1276 [DEVTYPE_IDEALTEK] = {
1277 .min_xc = 0x0,
1278 .max_xc = 0x0fff,
1279 .min_yc = 0x0,
1280 .max_yc = 0x0fff,
1281 .rept_size = 8,
1282 .process_pkt = usbtouch_process_multi,
1283 .get_pkt_len = idealtek_get_pkt_len,
1284 .read_data = idealtek_read_data,
1285 },
1286#endif
1287
1288#ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
1289 [DEVTYPE_GENERAL_TOUCH] = {
1290 .min_xc = 0x0,
1291 .max_xc = 0x7fff,
1292 .min_yc = 0x0,
1293 .max_yc = 0x7fff,
1294 .rept_size = 7,
1295 .read_data = general_touch_read_data,
1296 },
1297#endif
1298
1299#ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
1300 [DEVTYPE_GOTOP] = {
1301 .min_xc = 0x0,
1302 .max_xc = 0x03ff,
1303 .min_yc = 0x0,
1304 .max_yc = 0x03ff,
1305 .rept_size = 4,
1306 .read_data = gotop_read_data,
1307 },
1308#endif
1309
1310#ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
1311 [DEVTYPE_JASTEC] = {
1312 .min_xc = 0x0,
1313 .max_xc = 0x0fff,
1314 .min_yc = 0x0,
1315 .max_yc = 0x0fff,
1316 .rept_size = 4,
1317 .read_data = jastec_read_data,
1318 },
1319#endif
1320
1321#ifdef CONFIG_TOUCHSCREEN_USB_E2I
1322 [DEVTYPE_E2I] = {
1323 .min_xc = 0x0,
1324 .max_xc = 0x7fff,
1325 .min_yc = 0x0,
1326 .max_yc = 0x7fff,
1327 .rept_size = 6,
1328 .init = e2i_init,
1329 .read_data = e2i_read_data,
1330 },
1331#endif
1332
1333#ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
1334 [DEVTYPE_ZYTRONIC] = {
1335 .min_xc = 0x0,
1336 .max_xc = 0x03ff,
1337 .min_yc = 0x0,
1338 .max_yc = 0x03ff,
1339 .rept_size = 5,
1340 .read_data = zytronic_read_data,
1341 .irq_always = true,
1342 },
1343#endif
1344
1345#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
1346 [DEVTYPE_TC45USB] = {
1347 .min_xc = 0x0,
1348 .max_xc = 0x0fff,
1349 .min_yc = 0x0,
1350 .max_yc = 0x0fff,
1351 .rept_size = 5,
1352 .read_data = tc45usb_read_data,
1353 },
1354#endif
1355
1356#ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
1357 [DEVTYPE_NEXIO] = {
1358 .rept_size = 1024,
1359 .irq_always = true,
1360 .read_data = nexio_read_data,
1361 .alloc = nexio_alloc,
1362 .init = nexio_init,
1363 .exit = nexio_exit,
1364 },
1365#endif
1366#ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
1367 [DEVTYPE_ETOUCH] = {
1368 .min_xc = 0x0,
1369 .max_xc = 0x07ff,
1370 .min_yc = 0x0,
1371 .max_yc = 0x07ff,
1372 .rept_size = 16,
1373 .process_pkt = usbtouch_process_multi,
1374 .get_pkt_len = etouch_get_pkt_len,
1375 .read_data = etouch_read_data,
1376 },
1377#endif
1378};
1379
1380
1381/*****************************************************************************
1382 * Generic Part
1383 */
1384static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
1385 unsigned char *pkt, int len)
1386{
1387 struct usbtouch_device_info *type = usbtouch->type;
1388
1389 if (!type->read_data(usbtouch, pkt))
1390 return;
1391
1392 input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch);
1393
1394 if (swap_xy) {
1395 input_report_abs(usbtouch->input, ABS_X, usbtouch->y);
1396 input_report_abs(usbtouch->input, ABS_Y, usbtouch->x);
1397 } else {
1398 input_report_abs(usbtouch->input, ABS_X, usbtouch->x);
1399 input_report_abs(usbtouch->input, ABS_Y, usbtouch->y);
1400 }
1401 if (type->max_press)
1402 input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press);
1403 input_sync(usbtouch->input);
1404}
1405
1406
1407#ifdef MULTI_PACKET
1408static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1409 unsigned char *pkt, int len)
1410{
1411 unsigned char *buffer;
1412 int pkt_len, pos, buf_len, tmp;
1413
1414 /* process buffer */
1415 if (unlikely(usbtouch->buf_len)) {
1416 /* try to get size */
1417 pkt_len = usbtouch->type->get_pkt_len(
1418 usbtouch->buffer, usbtouch->buf_len);
1419
1420 /* drop? */
1421 if (unlikely(!pkt_len))
1422 goto out_flush_buf;
1423
1424 /* need to append -pkt_len bytes before able to get size */
1425 if (unlikely(pkt_len < 0)) {
1426 int append = -pkt_len;
1427 if (unlikely(append > len))
1428 append = len;
1429 if (usbtouch->buf_len + append >= usbtouch->type->rept_size)
1430 goto out_flush_buf;
1431 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append);
1432 usbtouch->buf_len += append;
1433
1434 pkt_len = usbtouch->type->get_pkt_len(
1435 usbtouch->buffer, usbtouch->buf_len);
1436 if (pkt_len < 0)
1437 return;
1438 }
1439
1440 /* append */
1441 tmp = pkt_len - usbtouch->buf_len;
1442 if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size)
1443 goto out_flush_buf;
1444 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp);
1445 usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len);
1446
1447 buffer = pkt + tmp;
1448 buf_len = len - tmp;
1449 } else {
1450 buffer = pkt;
1451 buf_len = len;
1452 }
1453
1454 /* loop over the received packet, process */
1455 pos = 0;
1456 while (pos < buf_len) {
1457 /* get packet len */
1458 pkt_len = usbtouch->type->get_pkt_len(buffer + pos,
1459 buf_len - pos);
1460
1461 /* unknown packet: skip one byte */
1462 if (unlikely(!pkt_len)) {
1463 pos++;
1464 continue;
1465 }
1466
1467 /* full packet: process */
1468 if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) {
1469 usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len);
1470 } else {
1471 /* incomplete packet: save in buffer */
1472 memcpy(usbtouch->buffer, buffer + pos, buf_len - pos);
1473 usbtouch->buf_len = buf_len - pos;
1474 return;
1475 }
1476 pos += pkt_len;
1477 }
1478
1479out_flush_buf:
1480 usbtouch->buf_len = 0;
1481 return;
1482}
1483#endif
1484
1485
1486static void usbtouch_irq(struct urb *urb)
1487{
1488 struct usbtouch_usb *usbtouch = urb->context;
1489 struct device *dev = &usbtouch->interface->dev;
1490 int retval;
1491
1492 switch (urb->status) {
1493 case 0:
1494 /* success */
1495 break;
1496 case -ETIME:
1497 /* this urb is timing out */
1498 dev_dbg(dev,
1499 "%s - urb timed out - was the device unplugged?\n",
1500 __func__);
1501 return;
1502 case -ECONNRESET:
1503 case -ENOENT:
1504 case -ESHUTDOWN:
1505 case -EPIPE:
1506 /* this urb is terminated, clean up */
1507 dev_dbg(dev, "%s - urb shutting down with status: %d\n",
1508 __func__, urb->status);
1509 return;
1510 default:
1511 dev_dbg(dev, "%s - nonzero urb status received: %d\n",
1512 __func__, urb->status);
1513 goto exit;
1514 }
1515
1516 usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length);
1517
1518exit:
1519 usb_mark_last_busy(interface_to_usbdev(usbtouch->interface));
1520 retval = usb_submit_urb(urb, GFP_ATOMIC);
1521 if (retval)
1522 dev_err(dev, "%s - usb_submit_urb failed with result: %d\n",
1523 __func__, retval);
1524}
1525
1526static int usbtouch_open(struct input_dev *input)
1527{
1528 struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1529 int r;
1530
1531 usbtouch->irq->dev = interface_to_usbdev(usbtouch->interface);
1532
1533 r = usb_autopm_get_interface(usbtouch->interface) ? -EIO : 0;
1534 if (r < 0)
1535 goto out;
1536
1537 mutex_lock(&usbtouch->pm_mutex);
1538 if (!usbtouch->type->irq_always) {
1539 if (usb_submit_urb(usbtouch->irq, GFP_KERNEL)) {
1540 r = -EIO;
1541 goto out_put;
1542 }
1543 }
1544
1545 usbtouch->interface->needs_remote_wakeup = 1;
1546 usbtouch->is_open = true;
1547out_put:
1548 mutex_unlock(&usbtouch->pm_mutex);
1549 usb_autopm_put_interface(usbtouch->interface);
1550out:
1551 return r;
1552}
1553
1554static void usbtouch_close(struct input_dev *input)
1555{
1556 struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1557 int r;
1558
1559 mutex_lock(&usbtouch->pm_mutex);
1560 if (!usbtouch->type->irq_always)
1561 usb_kill_urb(usbtouch->irq);
1562 usbtouch->is_open = false;
1563 mutex_unlock(&usbtouch->pm_mutex);
1564
1565 r = usb_autopm_get_interface(usbtouch->interface);
1566 usbtouch->interface->needs_remote_wakeup = 0;
1567 if (!r)
1568 usb_autopm_put_interface(usbtouch->interface);
1569}
1570
1571static int usbtouch_suspend
1572(struct usb_interface *intf, pm_message_t message)
1573{
1574 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1575
1576 usb_kill_urb(usbtouch->irq);
1577
1578 return 0;
1579}
1580
1581static int usbtouch_resume(struct usb_interface *intf)
1582{
1583 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1584 int result = 0;
1585
1586 mutex_lock(&usbtouch->pm_mutex);
1587 if (usbtouch->is_open || usbtouch->type->irq_always)
1588 result = usb_submit_urb(usbtouch->irq, GFP_NOIO);
1589 mutex_unlock(&usbtouch->pm_mutex);
1590
1591 return result;
1592}
1593
1594static int usbtouch_reset_resume(struct usb_interface *intf)
1595{
1596 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1597 int err = 0;
1598
1599 /* reinit the device */
1600 if (usbtouch->type->init) {
1601 err = usbtouch->type->init(usbtouch);
1602 if (err) {
1603 dev_dbg(&intf->dev,
1604 "%s - type->init() failed, err: %d\n",
1605 __func__, err);
1606 return err;
1607 }
1608 }
1609
1610 /* restart IO if needed */
1611 mutex_lock(&usbtouch->pm_mutex);
1612 if (usbtouch->is_open)
1613 err = usb_submit_urb(usbtouch->irq, GFP_NOIO);
1614 mutex_unlock(&usbtouch->pm_mutex);
1615
1616 return err;
1617}
1618
1619static void usbtouch_free_buffers(struct usb_device *udev,
1620 struct usbtouch_usb *usbtouch)
1621{
1622 usb_free_coherent(udev, usbtouch->data_size,
1623 usbtouch->data, usbtouch->data_dma);
1624 kfree(usbtouch->buffer);
1625}
1626
1627static struct usb_endpoint_descriptor *
1628usbtouch_get_input_endpoint(struct usb_host_interface *interface)
1629{
1630 int i;
1631
1632 for (i = 0; i < interface->desc.bNumEndpoints; i++)
1633 if (usb_endpoint_dir_in(&interface->endpoint[i].desc))
1634 return &interface->endpoint[i].desc;
1635
1636 return NULL;
1637}
1638
1639static int usbtouch_probe(struct usb_interface *intf,
1640 const struct usb_device_id *id)
1641{
1642 struct usbtouch_usb *usbtouch;
1643 struct input_dev *input_dev;
1644 struct usb_endpoint_descriptor *endpoint;
1645 struct usb_device *udev = interface_to_usbdev(intf);
1646 struct usbtouch_device_info *type;
1647 int err = -ENOMEM;
1648
1649 /* some devices are ignored */
1650 if (id->driver_info == DEVTYPE_IGNORE)
1651 return -ENODEV;
1652
1653 endpoint = usbtouch_get_input_endpoint(intf->cur_altsetting);
1654 if (!endpoint)
1655 return -ENXIO;
1656
1657 usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL);
1658 input_dev = input_allocate_device();
1659 if (!usbtouch || !input_dev)
1660 goto out_free;
1661
1662 mutex_init(&usbtouch->pm_mutex);
1663
1664 type = &usbtouch_dev_info[id->driver_info];
1665 usbtouch->type = type;
1666 if (!type->process_pkt)
1667 type->process_pkt = usbtouch_process_pkt;
1668
1669 usbtouch->data_size = type->rept_size;
1670 if (type->get_pkt_len) {
1671 /*
1672 * When dealing with variable-length packets we should
1673 * not request more than wMaxPacketSize bytes at once
1674 * as we do not know if there is more data coming or
1675 * we filled exactly wMaxPacketSize bytes and there is
1676 * nothing else.
1677 */
1678 usbtouch->data_size = min(usbtouch->data_size,
1679 usb_endpoint_maxp(endpoint));
1680 }
1681
1682 usbtouch->data = usb_alloc_coherent(udev, usbtouch->data_size,
1683 GFP_KERNEL, &usbtouch->data_dma);
1684 if (!usbtouch->data)
1685 goto out_free;
1686
1687 if (type->get_pkt_len) {
1688 usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL);
1689 if (!usbtouch->buffer)
1690 goto out_free_buffers;
1691 }
1692
1693 usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
1694 if (!usbtouch->irq) {
1695 dev_dbg(&intf->dev,
1696 "%s - usb_alloc_urb failed: usbtouch->irq\n", __func__);
1697 goto out_free_buffers;
1698 }
1699
1700 usbtouch->interface = intf;
1701 usbtouch->input = input_dev;
1702
1703 if (udev->manufacturer)
1704 strlcpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name));
1705
1706 if (udev->product) {
1707 if (udev->manufacturer)
1708 strlcat(usbtouch->name, " ", sizeof(usbtouch->name));
1709 strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name));
1710 }
1711
1712 if (!strlen(usbtouch->name))
1713 snprintf(usbtouch->name, sizeof(usbtouch->name),
1714 "USB Touchscreen %04x:%04x",
1715 le16_to_cpu(udev->descriptor.idVendor),
1716 le16_to_cpu(udev->descriptor.idProduct));
1717
1718 usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys));
1719 strlcat(usbtouch->phys, "/input0", sizeof(usbtouch->phys));
1720
1721 input_dev->name = usbtouch->name;
1722 input_dev->phys = usbtouch->phys;
1723 usb_to_input_id(udev, &input_dev->id);
1724 input_dev->dev.parent = &intf->dev;
1725
1726 input_set_drvdata(input_dev, usbtouch);
1727
1728 input_dev->open = usbtouch_open;
1729 input_dev->close = usbtouch_close;
1730
1731 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
1732 input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
1733 input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0);
1734 input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0);
1735 if (type->max_press)
1736 input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press,
1737 type->max_press, 0, 0);
1738
1739 if (usb_endpoint_type(endpoint) == USB_ENDPOINT_XFER_INT)
1740 usb_fill_int_urb(usbtouch->irq, udev,
1741 usb_rcvintpipe(udev, endpoint->bEndpointAddress),
1742 usbtouch->data, usbtouch->data_size,
1743 usbtouch_irq, usbtouch, endpoint->bInterval);
1744 else
1745 usb_fill_bulk_urb(usbtouch->irq, udev,
1746 usb_rcvbulkpipe(udev, endpoint->bEndpointAddress),
1747 usbtouch->data, usbtouch->data_size,
1748 usbtouch_irq, usbtouch);
1749
1750 usbtouch->irq->dev = udev;
1751 usbtouch->irq->transfer_dma = usbtouch->data_dma;
1752 usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1753
1754 /* device specific allocations */
1755 if (type->alloc) {
1756 err = type->alloc(usbtouch);
1757 if (err) {
1758 dev_dbg(&intf->dev,
1759 "%s - type->alloc() failed, err: %d\n",
1760 __func__, err);
1761 goto out_free_urb;
1762 }
1763 }
1764
1765 /* device specific initialisation*/
1766 if (type->init) {
1767 err = type->init(usbtouch);
1768 if (err) {
1769 dev_dbg(&intf->dev,
1770 "%s - type->init() failed, err: %d\n",
1771 __func__, err);
1772 goto out_do_exit;
1773 }
1774 }
1775
1776 err = input_register_device(usbtouch->input);
1777 if (err) {
1778 dev_dbg(&intf->dev,
1779 "%s - input_register_device failed, err: %d\n",
1780 __func__, err);
1781 goto out_do_exit;
1782 }
1783
1784 usb_set_intfdata(intf, usbtouch);
1785
1786 if (usbtouch->type->irq_always) {
1787 /* this can't fail */
1788 usb_autopm_get_interface(intf);
1789 err = usb_submit_urb(usbtouch->irq, GFP_KERNEL);
1790 if (err) {
1791 usb_autopm_put_interface(intf);
1792 dev_err(&intf->dev,
1793 "%s - usb_submit_urb failed with result: %d\n",
1794 __func__, err);
1795 goto out_unregister_input;
1796 }
1797 }
1798
1799 return 0;
1800
1801out_unregister_input:
1802 input_unregister_device(input_dev);
1803 input_dev = NULL;
1804out_do_exit:
1805 if (type->exit)
1806 type->exit(usbtouch);
1807out_free_urb:
1808 usb_free_urb(usbtouch->irq);
1809out_free_buffers:
1810 usbtouch_free_buffers(udev, usbtouch);
1811out_free:
1812 input_free_device(input_dev);
1813 kfree(usbtouch);
1814 return err;
1815}
1816
1817static void usbtouch_disconnect(struct usb_interface *intf)
1818{
1819 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1820
1821 if (!usbtouch)
1822 return;
1823
1824 dev_dbg(&intf->dev,
1825 "%s - usbtouch is initialized, cleaning up\n", __func__);
1826
1827 usb_set_intfdata(intf, NULL);
1828 /* this will stop IO via close */
1829 input_unregister_device(usbtouch->input);
1830 usb_free_urb(usbtouch->irq);
1831 if (usbtouch->type->exit)
1832 usbtouch->type->exit(usbtouch);
1833 usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch);
1834 kfree(usbtouch);
1835}
1836
1837MODULE_DEVICE_TABLE(usb, usbtouch_devices);
1838
1839static struct usb_driver usbtouch_driver = {
1840 .name = "usbtouchscreen",
1841 .probe = usbtouch_probe,
1842 .disconnect = usbtouch_disconnect,
1843 .suspend = usbtouch_suspend,
1844 .resume = usbtouch_resume,
1845 .reset_resume = usbtouch_reset_resume,
1846 .id_table = usbtouch_devices,
1847 .supports_autosuspend = 1,
1848};
1849
1850module_usb_driver(usbtouch_driver);
1851
1852MODULE_AUTHOR("Daniel Ritz <daniel.ritz@gmx.ch>");
1853MODULE_DESCRIPTION("USB Touchscreen Driver");
1854MODULE_LICENSE("GPL");
1855
1856MODULE_ALIAS("touchkitusb");
1857MODULE_ALIAS("itmtouch");
1858MODULE_ALIAS("mtouchusb");