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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(0x255e, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
186 {USB_DEVICE(0x595a, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
187 {USB_DEVICE(0x6615, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
188 {USB_DEVICE(0x6615, 0x0012), .driver_info = DEVTYPE_IRTOUCH_HIRES},
189#endif
190
191#ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
192 {USB_DEVICE(0x1391, 0x1000), .driver_info = DEVTYPE_IDEALTEK},
193#endif
194
195#ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
196 {USB_DEVICE(0x0dfc, 0x0001), .driver_info = DEVTYPE_GENERAL_TOUCH},
197#endif
198
199#ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
200 {USB_DEVICE(0x08f2, 0x007f), .driver_info = DEVTYPE_GOTOP},
201 {USB_DEVICE(0x08f2, 0x00ce), .driver_info = DEVTYPE_GOTOP},
202 {USB_DEVICE(0x08f2, 0x00f4), .driver_info = DEVTYPE_GOTOP},
203#endif
204
205#ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
206 {USB_DEVICE(0x0f92, 0x0001), .driver_info = DEVTYPE_JASTEC},
207#endif
208
209#ifdef CONFIG_TOUCHSCREEN_USB_E2I
210 {USB_DEVICE(0x1ac7, 0x0001), .driver_info = DEVTYPE_E2I},
211#endif
212
213#ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
214 {USB_DEVICE(0x14c8, 0x0003), .driver_info = DEVTYPE_ZYTRONIC},
215#endif
216
217#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
218 /* TC5UH */
219 {USB_DEVICE(0x0664, 0x0309), .driver_info = DEVTYPE_TC45USB},
220 /* TC4UM */
221 {USB_DEVICE(0x0664, 0x0306), .driver_info = DEVTYPE_TC45USB},
222#endif
223
224#ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
225 /* data interface only */
226 {USB_DEVICE_AND_INTERFACE_INFO(0x10f0, 0x2002, 0x0a, 0x00, 0x00),
227 .driver_info = DEVTYPE_NEXIO},
228 {USB_DEVICE_AND_INTERFACE_INFO(0x1870, 0x0001, 0x0a, 0x00, 0x00),
229 .driver_info = DEVTYPE_NEXIO},
230#endif
231
232#ifdef CONFIG_TOUCHSCREEN_USB_ELO
233 {USB_DEVICE(0x04e7, 0x0020), .driver_info = DEVTYPE_ELO},
234#endif
235
236#ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
237 {USB_DEVICE(0x7374, 0x0001), .driver_info = DEVTYPE_ETOUCH},
238#endif
239
240 {}
241};
242
243
244/*****************************************************************************
245 * e2i Part
246 */
247
248#ifdef CONFIG_TOUCHSCREEN_USB_E2I
249static int e2i_init(struct usbtouch_usb *usbtouch)
250{
251 int ret;
252 struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
253
254 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
255 0x01, 0x02, 0x0000, 0x0081,
256 NULL, 0, USB_CTRL_SET_TIMEOUT);
257
258 dev_dbg(&usbtouch->interface->dev,
259 "%s - usb_control_msg - E2I_RESET - bytes|err: %d\n",
260 __func__, ret);
261 return ret;
262}
263
264static int e2i_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
265{
266 int tmp = (pkt[0] << 8) | pkt[1];
267 dev->x = (pkt[2] << 8) | pkt[3];
268 dev->y = (pkt[4] << 8) | pkt[5];
269
270 tmp = tmp - 0xA000;
271 dev->touch = (tmp > 0);
272 dev->press = (tmp > 0 ? tmp : 0);
273
274 return 1;
275}
276#endif
277
278
279/*****************************************************************************
280 * eGalax part
281 */
282
283#ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
284
285#ifndef MULTI_PACKET
286#define MULTI_PACKET
287#endif
288
289#define EGALAX_PKT_TYPE_MASK 0xFE
290#define EGALAX_PKT_TYPE_REPT 0x80
291#define EGALAX_PKT_TYPE_DIAG 0x0A
292
293static int egalax_init(struct usbtouch_usb *usbtouch)
294{
295 int ret, i;
296 unsigned char *buf;
297 struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
298
299 /*
300 * An eGalax diagnostic packet kicks the device into using the right
301 * protocol. We send a "check active" packet. The response will be
302 * read later and ignored.
303 */
304
305 buf = kmalloc(3, GFP_KERNEL);
306 if (!buf)
307 return -ENOMEM;
308
309 buf[0] = EGALAX_PKT_TYPE_DIAG;
310 buf[1] = 1; /* length */
311 buf[2] = 'A'; /* command - check active */
312
313 for (i = 0; i < 3; i++) {
314 ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
315 0,
316 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
317 0, 0, buf, 3,
318 USB_CTRL_SET_TIMEOUT);
319 if (ret >= 0) {
320 ret = 0;
321 break;
322 }
323 if (ret != -EPIPE)
324 break;
325 }
326
327 kfree(buf);
328
329 return ret;
330}
331
332static int egalax_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
333{
334 if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT)
335 return 0;
336
337 dev->x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F);
338 dev->y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F);
339 dev->touch = pkt[0] & 0x01;
340
341 return 1;
342}
343
344static int egalax_get_pkt_len(unsigned char *buf, int len)
345{
346 switch (buf[0] & EGALAX_PKT_TYPE_MASK) {
347 case EGALAX_PKT_TYPE_REPT:
348 return 5;
349
350 case EGALAX_PKT_TYPE_DIAG:
351 if (len < 2)
352 return -1;
353
354 return buf[1] + 2;
355 }
356
357 return 0;
358}
359#endif
360
361/*****************************************************************************
362 * EasyTouch part
363 */
364
365#ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
366
367#ifndef MULTI_PACKET
368#define MULTI_PACKET
369#endif
370
371#define ETOUCH_PKT_TYPE_MASK 0xFE
372#define ETOUCH_PKT_TYPE_REPT 0x80
373#define ETOUCH_PKT_TYPE_REPT2 0xB0
374#define ETOUCH_PKT_TYPE_DIAG 0x0A
375
376static int etouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
377{
378 if ((pkt[0] & ETOUCH_PKT_TYPE_MASK) != ETOUCH_PKT_TYPE_REPT &&
379 (pkt[0] & ETOUCH_PKT_TYPE_MASK) != ETOUCH_PKT_TYPE_REPT2)
380 return 0;
381
382 dev->x = ((pkt[1] & 0x1F) << 7) | (pkt[2] & 0x7F);
383 dev->y = ((pkt[3] & 0x1F) << 7) | (pkt[4] & 0x7F);
384 dev->touch = pkt[0] & 0x01;
385
386 return 1;
387}
388
389static int etouch_get_pkt_len(unsigned char *buf, int len)
390{
391 switch (buf[0] & ETOUCH_PKT_TYPE_MASK) {
392 case ETOUCH_PKT_TYPE_REPT:
393 case ETOUCH_PKT_TYPE_REPT2:
394 return 5;
395
396 case ETOUCH_PKT_TYPE_DIAG:
397 if (len < 2)
398 return -1;
399
400 return buf[1] + 2;
401 }
402
403 return 0;
404}
405#endif
406
407/*****************************************************************************
408 * PanJit Part
409 */
410#ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
411static int panjit_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
412{
413 dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
414 dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
415 dev->touch = pkt[0] & 0x01;
416
417 return 1;
418}
419#endif
420
421
422/*****************************************************************************
423 * 3M/Microtouch Part
424 */
425#ifdef CONFIG_TOUCHSCREEN_USB_3M
426
427#define MTOUCHUSB_ASYNC_REPORT 1
428#define MTOUCHUSB_RESET 7
429#define MTOUCHUSB_REQ_CTRLLR_ID 10
430
431#define MTOUCHUSB_REQ_CTRLLR_ID_LEN 16
432
433static int mtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
434{
435 if (hwcalib_xy) {
436 dev->x = (pkt[4] << 8) | pkt[3];
437 dev->y = 0xffff - ((pkt[6] << 8) | pkt[5]);
438 } else {
439 dev->x = (pkt[8] << 8) | pkt[7];
440 dev->y = (pkt[10] << 8) | pkt[9];
441 }
442 dev->touch = (pkt[2] & 0x40) ? 1 : 0;
443
444 return 1;
445}
446
447struct mtouch_priv {
448 u8 fw_rev_major;
449 u8 fw_rev_minor;
450};
451
452static ssize_t mtouch_firmware_rev_show(struct device *dev,
453 struct device_attribute *attr, char *output)
454{
455 struct usb_interface *intf = to_usb_interface(dev);
456 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
457 struct mtouch_priv *priv = usbtouch->priv;
458
459 return scnprintf(output, PAGE_SIZE, "%1x.%1x\n",
460 priv->fw_rev_major, priv->fw_rev_minor);
461}
462static DEVICE_ATTR(firmware_rev, 0444, mtouch_firmware_rev_show, NULL);
463
464static struct attribute *mtouch_attrs[] = {
465 &dev_attr_firmware_rev.attr,
466 NULL
467};
468
469static const struct attribute_group mtouch_attr_group = {
470 .attrs = mtouch_attrs,
471};
472
473static int mtouch_get_fw_revision(struct usbtouch_usb *usbtouch)
474{
475 struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
476 struct mtouch_priv *priv = usbtouch->priv;
477 u8 *buf;
478 int ret;
479
480 buf = kzalloc(MTOUCHUSB_REQ_CTRLLR_ID_LEN, GFP_NOIO);
481 if (!buf)
482 return -ENOMEM;
483
484 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
485 MTOUCHUSB_REQ_CTRLLR_ID,
486 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
487 0, 0, buf, MTOUCHUSB_REQ_CTRLLR_ID_LEN,
488 USB_CTRL_SET_TIMEOUT);
489 if (ret != MTOUCHUSB_REQ_CTRLLR_ID_LEN) {
490 dev_warn(&usbtouch->interface->dev,
491 "Failed to read FW rev: %d\n", ret);
492 ret = ret < 0 ? ret : -EIO;
493 goto free;
494 }
495
496 priv->fw_rev_major = buf[3];
497 priv->fw_rev_minor = buf[4];
498
499 ret = 0;
500
501free:
502 kfree(buf);
503 return ret;
504}
505
506static int mtouch_alloc(struct usbtouch_usb *usbtouch)
507{
508 int ret;
509
510 usbtouch->priv = kmalloc(sizeof(struct mtouch_priv), GFP_KERNEL);
511 if (!usbtouch->priv)
512 return -ENOMEM;
513
514 ret = sysfs_create_group(&usbtouch->interface->dev.kobj,
515 &mtouch_attr_group);
516 if (ret) {
517 kfree(usbtouch->priv);
518 usbtouch->priv = NULL;
519 return ret;
520 }
521
522 return 0;
523}
524
525static int mtouch_init(struct usbtouch_usb *usbtouch)
526{
527 int ret, i;
528 struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
529
530 ret = mtouch_get_fw_revision(usbtouch);
531 if (ret)
532 return ret;
533
534 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
535 MTOUCHUSB_RESET,
536 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
537 1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
538 dev_dbg(&usbtouch->interface->dev,
539 "%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d\n",
540 __func__, ret);
541 if (ret < 0)
542 return ret;
543 msleep(150);
544
545 for (i = 0; i < 3; i++) {
546 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
547 MTOUCHUSB_ASYNC_REPORT,
548 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
549 1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT);
550 dev_dbg(&usbtouch->interface->dev,
551 "%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d\n",
552 __func__, ret);
553 if (ret >= 0)
554 break;
555 if (ret != -EPIPE)
556 return ret;
557 }
558
559 /* Default min/max xy are the raw values, override if using hw-calib */
560 if (hwcalib_xy) {
561 input_set_abs_params(usbtouch->input, ABS_X, 0, 0xffff, 0, 0);
562 input_set_abs_params(usbtouch->input, ABS_Y, 0, 0xffff, 0, 0);
563 }
564
565 return 0;
566}
567
568static void mtouch_exit(struct usbtouch_usb *usbtouch)
569{
570 struct mtouch_priv *priv = usbtouch->priv;
571
572 sysfs_remove_group(&usbtouch->interface->dev.kobj, &mtouch_attr_group);
573 kfree(priv);
574}
575#endif
576
577
578/*****************************************************************************
579 * ITM Part
580 */
581#ifdef CONFIG_TOUCHSCREEN_USB_ITM
582static int itm_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
583{
584 int touch;
585 /*
586 * ITM devices report invalid x/y data if not touched.
587 * if the screen was touched before but is not touched any more
588 * report touch as 0 with the last valid x/y data once. then stop
589 * reporting data until touched again.
590 */
591 dev->press = ((pkt[2] & 0x01) << 7) | (pkt[5] & 0x7F);
592
593 touch = ~pkt[7] & 0x20;
594 if (!touch) {
595 if (dev->touch) {
596 dev->touch = 0;
597 return 1;
598 }
599
600 return 0;
601 }
602
603 dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F);
604 dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F);
605 dev->touch = touch;
606
607 return 1;
608}
609#endif
610
611
612/*****************************************************************************
613 * eTurboTouch part
614 */
615#ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
616#ifndef MULTI_PACKET
617#define MULTI_PACKET
618#endif
619static int eturbo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
620{
621 unsigned int shift;
622
623 /* packets should start with sync */
624 if (!(pkt[0] & 0x80))
625 return 0;
626
627 shift = (6 - (pkt[0] & 0x03));
628 dev->x = ((pkt[3] << 7) | pkt[4]) >> shift;
629 dev->y = ((pkt[1] << 7) | pkt[2]) >> shift;
630 dev->touch = (pkt[0] & 0x10) ? 1 : 0;
631
632 return 1;
633}
634
635static int eturbo_get_pkt_len(unsigned char *buf, int len)
636{
637 if (buf[0] & 0x80)
638 return 5;
639 if (buf[0] == 0x01)
640 return 3;
641 return 0;
642}
643#endif
644
645
646/*****************************************************************************
647 * Gunze part
648 */
649#ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
650static int gunze_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
651{
652 if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80))
653 return 0;
654
655 dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F);
656 dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F);
657 dev->touch = pkt[0] & 0x20;
658
659 return 1;
660}
661#endif
662
663/*****************************************************************************
664 * DMC TSC-10/25 Part
665 *
666 * Documentation about the controller and it's protocol can be found at
667 * http://www.dmccoltd.com/files/controler/tsc10usb_pi_e.pdf
668 * http://www.dmccoltd.com/files/controler/tsc25_usb_e.pdf
669 */
670#ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
671
672/* supported data rates. currently using 130 */
673#define TSC10_RATE_POINT 0x50
674#define TSC10_RATE_30 0x40
675#define TSC10_RATE_50 0x41
676#define TSC10_RATE_80 0x42
677#define TSC10_RATE_100 0x43
678#define TSC10_RATE_130 0x44
679#define TSC10_RATE_150 0x45
680
681/* commands */
682#define TSC10_CMD_RESET 0x55
683#define TSC10_CMD_RATE 0x05
684#define TSC10_CMD_DATA1 0x01
685
686static int dmc_tsc10_init(struct usbtouch_usb *usbtouch)
687{
688 struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
689 int ret = -ENOMEM;
690 unsigned char *buf;
691
692 buf = kmalloc(2, GFP_NOIO);
693 if (!buf)
694 goto err_nobuf;
695 /* reset */
696 buf[0] = buf[1] = 0xFF;
697 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
698 TSC10_CMD_RESET,
699 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
700 0, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
701 if (ret < 0)
702 goto err_out;
703 if (buf[0] != 0x06) {
704 ret = -ENODEV;
705 goto err_out;
706 }
707
708 /* TSC-25 data sheet specifies a delay after the RESET command */
709 msleep(150);
710
711 /* set coordinate output rate */
712 buf[0] = buf[1] = 0xFF;
713 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
714 TSC10_CMD_RATE,
715 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
716 TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
717 if (ret < 0)
718 goto err_out;
719 if ((buf[0] != 0x06) && (buf[0] != 0x15 || buf[1] != 0x01)) {
720 ret = -ENODEV;
721 goto err_out;
722 }
723
724 /* start sending data */
725 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
726 TSC10_CMD_DATA1,
727 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
728 0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
729err_out:
730 kfree(buf);
731err_nobuf:
732 return ret;
733}
734
735
736static int dmc_tsc10_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
737{
738 dev->x = ((pkt[2] & 0x03) << 8) | pkt[1];
739 dev->y = ((pkt[4] & 0x03) << 8) | pkt[3];
740 dev->touch = pkt[0] & 0x01;
741
742 return 1;
743}
744#endif
745
746
747/*****************************************************************************
748 * IRTOUCH Part
749 */
750#ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
751static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
752{
753 dev->x = (pkt[3] << 8) | pkt[2];
754 dev->y = (pkt[5] << 8) | pkt[4];
755 dev->touch = (pkt[1] & 0x03) ? 1 : 0;
756
757 return 1;
758}
759#endif
760
761/*****************************************************************************
762 * ET&T TC5UH/TC4UM part
763 */
764#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
765static int tc45usb_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
766{
767 dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
768 dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
769 dev->touch = pkt[0] & 0x01;
770
771 return 1;
772}
773#endif
774
775/*****************************************************************************
776 * IdealTEK URTC1000 Part
777 */
778#ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
779#ifndef MULTI_PACKET
780#define MULTI_PACKET
781#endif
782static int idealtek_get_pkt_len(unsigned char *buf, int len)
783{
784 if (buf[0] & 0x80)
785 return 5;
786 if (buf[0] == 0x01)
787 return len;
788 return 0;
789}
790
791static int idealtek_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
792{
793 switch (pkt[0] & 0x98) {
794 case 0x88:
795 /* touch data in IdealTEK mode */
796 dev->x = (pkt[1] << 5) | (pkt[2] >> 2);
797 dev->y = (pkt[3] << 5) | (pkt[4] >> 2);
798 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
799 return 1;
800
801 case 0x98:
802 /* touch data in MT emulation mode */
803 dev->x = (pkt[2] << 5) | (pkt[1] >> 2);
804 dev->y = (pkt[4] << 5) | (pkt[3] >> 2);
805 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
806 return 1;
807
808 default:
809 return 0;
810 }
811}
812#endif
813
814/*****************************************************************************
815 * General Touch Part
816 */
817#ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
818static int general_touch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
819{
820 dev->x = (pkt[2] << 8) | pkt[1];
821 dev->y = (pkt[4] << 8) | pkt[3];
822 dev->press = pkt[5] & 0xff;
823 dev->touch = pkt[0] & 0x01;
824
825 return 1;
826}
827#endif
828
829/*****************************************************************************
830 * GoTop Part
831 */
832#ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
833static int gotop_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
834{
835 dev->x = ((pkt[1] & 0x38) << 4) | pkt[2];
836 dev->y = ((pkt[1] & 0x07) << 7) | pkt[3];
837 dev->touch = pkt[0] & 0x01;
838
839 return 1;
840}
841#endif
842
843/*****************************************************************************
844 * JASTEC Part
845 */
846#ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
847static int jastec_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
848{
849 dev->x = ((pkt[0] & 0x3f) << 6) | (pkt[2] & 0x3f);
850 dev->y = ((pkt[1] & 0x3f) << 6) | (pkt[3] & 0x3f);
851 dev->touch = (pkt[0] & 0x40) >> 6;
852
853 return 1;
854}
855#endif
856
857/*****************************************************************************
858 * Zytronic Part
859 */
860#ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
861static int zytronic_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
862{
863 struct usb_interface *intf = dev->interface;
864
865 switch (pkt[0]) {
866 case 0x3A: /* command response */
867 dev_dbg(&intf->dev, "%s: Command response %d\n", __func__, pkt[1]);
868 break;
869
870 case 0xC0: /* down */
871 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
872 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
873 dev->touch = 1;
874 dev_dbg(&intf->dev, "%s: down %d,%d\n", __func__, dev->x, dev->y);
875 return 1;
876
877 case 0x80: /* up */
878 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
879 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
880 dev->touch = 0;
881 dev_dbg(&intf->dev, "%s: up %d,%d\n", __func__, dev->x, dev->y);
882 return 1;
883
884 default:
885 dev_dbg(&intf->dev, "%s: Unknown return %d\n", __func__, pkt[0]);
886 break;
887 }
888
889 return 0;
890}
891#endif
892
893/*****************************************************************************
894 * NEXIO Part
895 */
896#ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
897
898#define NEXIO_TIMEOUT 5000
899#define NEXIO_BUFSIZE 1024
900#define NEXIO_THRESHOLD 50
901
902struct nexio_priv {
903 struct urb *ack;
904 unsigned char *ack_buf;
905};
906
907struct nexio_touch_packet {
908 u8 flags; /* 0xe1 = touch, 0xe1 = release */
909 __be16 data_len; /* total bytes of touch data */
910 __be16 x_len; /* bytes for X axis */
911 __be16 y_len; /* bytes for Y axis */
912 u8 data[];
913} __attribute__ ((packed));
914
915static unsigned char nexio_ack_pkt[2] = { 0xaa, 0x02 };
916static unsigned char nexio_init_pkt[4] = { 0x82, 0x04, 0x0a, 0x0f };
917
918static void nexio_ack_complete(struct urb *urb)
919{
920}
921
922static int nexio_alloc(struct usbtouch_usb *usbtouch)
923{
924 struct nexio_priv *priv;
925 int ret = -ENOMEM;
926
927 usbtouch->priv = kmalloc(sizeof(struct nexio_priv), GFP_KERNEL);
928 if (!usbtouch->priv)
929 goto out_buf;
930
931 priv = usbtouch->priv;
932
933 priv->ack_buf = kmemdup(nexio_ack_pkt, sizeof(nexio_ack_pkt),
934 GFP_KERNEL);
935 if (!priv->ack_buf)
936 goto err_priv;
937
938 priv->ack = usb_alloc_urb(0, GFP_KERNEL);
939 if (!priv->ack) {
940 dev_dbg(&usbtouch->interface->dev,
941 "%s - usb_alloc_urb failed: usbtouch->ack\n", __func__);
942 goto err_ack_buf;
943 }
944
945 return 0;
946
947err_ack_buf:
948 kfree(priv->ack_buf);
949err_priv:
950 kfree(priv);
951out_buf:
952 return ret;
953}
954
955static int nexio_init(struct usbtouch_usb *usbtouch)
956{
957 struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
958 struct usb_host_interface *interface = usbtouch->interface->cur_altsetting;
959 struct nexio_priv *priv = usbtouch->priv;
960 int ret = -ENOMEM;
961 int actual_len, i;
962 unsigned char *buf;
963 char *firmware_ver = NULL, *device_name = NULL;
964 int input_ep = 0, output_ep = 0;
965
966 /* find first input and output endpoint */
967 for (i = 0; i < interface->desc.bNumEndpoints; i++) {
968 if (!input_ep &&
969 usb_endpoint_dir_in(&interface->endpoint[i].desc))
970 input_ep = interface->endpoint[i].desc.bEndpointAddress;
971 if (!output_ep &&
972 usb_endpoint_dir_out(&interface->endpoint[i].desc))
973 output_ep = interface->endpoint[i].desc.bEndpointAddress;
974 }
975 if (!input_ep || !output_ep)
976 return -ENXIO;
977
978 buf = kmalloc(NEXIO_BUFSIZE, GFP_NOIO);
979 if (!buf)
980 goto out_buf;
981
982 /* two empty reads */
983 for (i = 0; i < 2; i++) {
984 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
985 buf, NEXIO_BUFSIZE, &actual_len,
986 NEXIO_TIMEOUT);
987 if (ret < 0)
988 goto out_buf;
989 }
990
991 /* send init command */
992 memcpy(buf, nexio_init_pkt, sizeof(nexio_init_pkt));
993 ret = usb_bulk_msg(dev, usb_sndbulkpipe(dev, output_ep),
994 buf, sizeof(nexio_init_pkt), &actual_len,
995 NEXIO_TIMEOUT);
996 if (ret < 0)
997 goto out_buf;
998
999 /* read replies */
1000 for (i = 0; i < 3; i++) {
1001 memset(buf, 0, NEXIO_BUFSIZE);
1002 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
1003 buf, NEXIO_BUFSIZE, &actual_len,
1004 NEXIO_TIMEOUT);
1005 if (ret < 0 || actual_len < 1 || buf[1] != actual_len)
1006 continue;
1007 switch (buf[0]) {
1008 case 0x83: /* firmware version */
1009 if (!firmware_ver)
1010 firmware_ver = kstrdup(&buf[2], GFP_NOIO);
1011 break;
1012 case 0x84: /* device name */
1013 if (!device_name)
1014 device_name = kstrdup(&buf[2], GFP_NOIO);
1015 break;
1016 }
1017 }
1018
1019 printk(KERN_INFO "Nexio device: %s, firmware version: %s\n",
1020 device_name, firmware_ver);
1021
1022 kfree(firmware_ver);
1023 kfree(device_name);
1024
1025 usb_fill_bulk_urb(priv->ack, dev, usb_sndbulkpipe(dev, output_ep),
1026 priv->ack_buf, sizeof(nexio_ack_pkt),
1027 nexio_ack_complete, usbtouch);
1028 ret = 0;
1029
1030out_buf:
1031 kfree(buf);
1032 return ret;
1033}
1034
1035static void nexio_exit(struct usbtouch_usb *usbtouch)
1036{
1037 struct nexio_priv *priv = usbtouch->priv;
1038
1039 usb_kill_urb(priv->ack);
1040 usb_free_urb(priv->ack);
1041 kfree(priv->ack_buf);
1042 kfree(priv);
1043}
1044
1045static int nexio_read_data(struct usbtouch_usb *usbtouch, unsigned char *pkt)
1046{
1047 struct nexio_touch_packet *packet = (void *) pkt;
1048 struct nexio_priv *priv = usbtouch->priv;
1049 unsigned int data_len = be16_to_cpu(packet->data_len);
1050 unsigned int x_len = be16_to_cpu(packet->x_len);
1051 unsigned int y_len = be16_to_cpu(packet->y_len);
1052 int x, y, begin_x, begin_y, end_x, end_y, w, h, ret;
1053
1054 /* got touch data? */
1055 if ((pkt[0] & 0xe0) != 0xe0)
1056 return 0;
1057
1058 if (data_len > 0xff)
1059 data_len -= 0x100;
1060 if (x_len > 0xff)
1061 x_len -= 0x80;
1062
1063 /* send ACK */
1064 ret = usb_submit_urb(priv->ack, GFP_ATOMIC);
1065
1066 if (!usbtouch->type->max_xc) {
1067 usbtouch->type->max_xc = 2 * x_len;
1068 input_set_abs_params(usbtouch->input, ABS_X,
1069 0, usbtouch->type->max_xc, 0, 0);
1070 usbtouch->type->max_yc = 2 * y_len;
1071 input_set_abs_params(usbtouch->input, ABS_Y,
1072 0, usbtouch->type->max_yc, 0, 0);
1073 }
1074 /*
1075 * The device reports state of IR sensors on X and Y axes.
1076 * Each byte represents "darkness" percentage (0-100) of one element.
1077 * 17" touchscreen reports only 64 x 52 bytes so the resolution is low.
1078 * This also means that there's a limited multi-touch capability but
1079 * it's disabled (and untested) here as there's no X driver for that.
1080 */
1081 begin_x = end_x = begin_y = end_y = -1;
1082 for (x = 0; x < x_len; x++) {
1083 if (begin_x == -1 && packet->data[x] > NEXIO_THRESHOLD) {
1084 begin_x = x;
1085 continue;
1086 }
1087 if (end_x == -1 && begin_x != -1 && packet->data[x] < NEXIO_THRESHOLD) {
1088 end_x = x - 1;
1089 for (y = x_len; y < data_len; y++) {
1090 if (begin_y == -1 && packet->data[y] > NEXIO_THRESHOLD) {
1091 begin_y = y - x_len;
1092 continue;
1093 }
1094 if (end_y == -1 &&
1095 begin_y != -1 && packet->data[y] < NEXIO_THRESHOLD) {
1096 end_y = y - 1 - x_len;
1097 w = end_x - begin_x;
1098 h = end_y - begin_y;
1099#if 0
1100 /* multi-touch */
1101 input_report_abs(usbtouch->input,
1102 ABS_MT_TOUCH_MAJOR, max(w,h));
1103 input_report_abs(usbtouch->input,
1104 ABS_MT_TOUCH_MINOR, min(x,h));
1105 input_report_abs(usbtouch->input,
1106 ABS_MT_POSITION_X, 2*begin_x+w);
1107 input_report_abs(usbtouch->input,
1108 ABS_MT_POSITION_Y, 2*begin_y+h);
1109 input_report_abs(usbtouch->input,
1110 ABS_MT_ORIENTATION, w > h);
1111 input_mt_sync(usbtouch->input);
1112#endif
1113 /* single touch */
1114 usbtouch->x = 2 * begin_x + w;
1115 usbtouch->y = 2 * begin_y + h;
1116 usbtouch->touch = packet->flags & 0x01;
1117 begin_y = end_y = -1;
1118 return 1;
1119 }
1120 }
1121 begin_x = end_x = -1;
1122 }
1123
1124 }
1125 return 0;
1126}
1127#endif
1128
1129
1130/*****************************************************************************
1131 * ELO part
1132 */
1133
1134#ifdef CONFIG_TOUCHSCREEN_USB_ELO
1135
1136static int elo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
1137{
1138 dev->x = (pkt[3] << 8) | pkt[2];
1139 dev->y = (pkt[5] << 8) | pkt[4];
1140 dev->touch = pkt[6] > 0;
1141 dev->press = pkt[6];
1142
1143 return 1;
1144}
1145#endif
1146
1147
1148/*****************************************************************************
1149 * the different device descriptors
1150 */
1151#ifdef MULTI_PACKET
1152static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1153 unsigned char *pkt, int len);
1154#endif
1155
1156static struct usbtouch_device_info usbtouch_dev_info[] = {
1157#ifdef CONFIG_TOUCHSCREEN_USB_ELO
1158 [DEVTYPE_ELO] = {
1159 .min_xc = 0x0,
1160 .max_xc = 0x0fff,
1161 .min_yc = 0x0,
1162 .max_yc = 0x0fff,
1163 .max_press = 0xff,
1164 .rept_size = 8,
1165 .read_data = elo_read_data,
1166 },
1167#endif
1168
1169#ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
1170 [DEVTYPE_EGALAX] = {
1171 .min_xc = 0x0,
1172 .max_xc = 0x07ff,
1173 .min_yc = 0x0,
1174 .max_yc = 0x07ff,
1175 .rept_size = 16,
1176 .process_pkt = usbtouch_process_multi,
1177 .get_pkt_len = egalax_get_pkt_len,
1178 .read_data = egalax_read_data,
1179 .init = egalax_init,
1180 },
1181#endif
1182
1183#ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
1184 [DEVTYPE_PANJIT] = {
1185 .min_xc = 0x0,
1186 .max_xc = 0x0fff,
1187 .min_yc = 0x0,
1188 .max_yc = 0x0fff,
1189 .rept_size = 8,
1190 .read_data = panjit_read_data,
1191 },
1192#endif
1193
1194#ifdef CONFIG_TOUCHSCREEN_USB_3M
1195 [DEVTYPE_3M] = {
1196 .min_xc = 0x0,
1197 .max_xc = 0x4000,
1198 .min_yc = 0x0,
1199 .max_yc = 0x4000,
1200 .rept_size = 11,
1201 .read_data = mtouch_read_data,
1202 .alloc = mtouch_alloc,
1203 .init = mtouch_init,
1204 .exit = mtouch_exit,
1205 },
1206#endif
1207
1208#ifdef CONFIG_TOUCHSCREEN_USB_ITM
1209 [DEVTYPE_ITM] = {
1210 .min_xc = 0x0,
1211 .max_xc = 0x0fff,
1212 .min_yc = 0x0,
1213 .max_yc = 0x0fff,
1214 .max_press = 0xff,
1215 .rept_size = 8,
1216 .read_data = itm_read_data,
1217 },
1218#endif
1219
1220#ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
1221 [DEVTYPE_ETURBO] = {
1222 .min_xc = 0x0,
1223 .max_xc = 0x07ff,
1224 .min_yc = 0x0,
1225 .max_yc = 0x07ff,
1226 .rept_size = 8,
1227 .process_pkt = usbtouch_process_multi,
1228 .get_pkt_len = eturbo_get_pkt_len,
1229 .read_data = eturbo_read_data,
1230 },
1231#endif
1232
1233#ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
1234 [DEVTYPE_GUNZE] = {
1235 .min_xc = 0x0,
1236 .max_xc = 0x0fff,
1237 .min_yc = 0x0,
1238 .max_yc = 0x0fff,
1239 .rept_size = 4,
1240 .read_data = gunze_read_data,
1241 },
1242#endif
1243
1244#ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
1245 [DEVTYPE_DMC_TSC10] = {
1246 .min_xc = 0x0,
1247 .max_xc = 0x03ff,
1248 .min_yc = 0x0,
1249 .max_yc = 0x03ff,
1250 .rept_size = 5,
1251 .init = dmc_tsc10_init,
1252 .read_data = dmc_tsc10_read_data,
1253 },
1254#endif
1255
1256#ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
1257 [DEVTYPE_IRTOUCH] = {
1258 .min_xc = 0x0,
1259 .max_xc = 0x0fff,
1260 .min_yc = 0x0,
1261 .max_yc = 0x0fff,
1262 .rept_size = 8,
1263 .read_data = irtouch_read_data,
1264 },
1265
1266 [DEVTYPE_IRTOUCH_HIRES] = {
1267 .min_xc = 0x0,
1268 .max_xc = 0x7fff,
1269 .min_yc = 0x0,
1270 .max_yc = 0x7fff,
1271 .rept_size = 8,
1272 .read_data = irtouch_read_data,
1273 },
1274#endif
1275
1276#ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
1277 [DEVTYPE_IDEALTEK] = {
1278 .min_xc = 0x0,
1279 .max_xc = 0x0fff,
1280 .min_yc = 0x0,
1281 .max_yc = 0x0fff,
1282 .rept_size = 8,
1283 .process_pkt = usbtouch_process_multi,
1284 .get_pkt_len = idealtek_get_pkt_len,
1285 .read_data = idealtek_read_data,
1286 },
1287#endif
1288
1289#ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
1290 [DEVTYPE_GENERAL_TOUCH] = {
1291 .min_xc = 0x0,
1292 .max_xc = 0x7fff,
1293 .min_yc = 0x0,
1294 .max_yc = 0x7fff,
1295 .rept_size = 7,
1296 .read_data = general_touch_read_data,
1297 },
1298#endif
1299
1300#ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
1301 [DEVTYPE_GOTOP] = {
1302 .min_xc = 0x0,
1303 .max_xc = 0x03ff,
1304 .min_yc = 0x0,
1305 .max_yc = 0x03ff,
1306 .rept_size = 4,
1307 .read_data = gotop_read_data,
1308 },
1309#endif
1310
1311#ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
1312 [DEVTYPE_JASTEC] = {
1313 .min_xc = 0x0,
1314 .max_xc = 0x0fff,
1315 .min_yc = 0x0,
1316 .max_yc = 0x0fff,
1317 .rept_size = 4,
1318 .read_data = jastec_read_data,
1319 },
1320#endif
1321
1322#ifdef CONFIG_TOUCHSCREEN_USB_E2I
1323 [DEVTYPE_E2I] = {
1324 .min_xc = 0x0,
1325 .max_xc = 0x7fff,
1326 .min_yc = 0x0,
1327 .max_yc = 0x7fff,
1328 .rept_size = 6,
1329 .init = e2i_init,
1330 .read_data = e2i_read_data,
1331 },
1332#endif
1333
1334#ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
1335 [DEVTYPE_ZYTRONIC] = {
1336 .min_xc = 0x0,
1337 .max_xc = 0x03ff,
1338 .min_yc = 0x0,
1339 .max_yc = 0x03ff,
1340 .rept_size = 5,
1341 .read_data = zytronic_read_data,
1342 .irq_always = true,
1343 },
1344#endif
1345
1346#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
1347 [DEVTYPE_TC45USB] = {
1348 .min_xc = 0x0,
1349 .max_xc = 0x0fff,
1350 .min_yc = 0x0,
1351 .max_yc = 0x0fff,
1352 .rept_size = 5,
1353 .read_data = tc45usb_read_data,
1354 },
1355#endif
1356
1357#ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
1358 [DEVTYPE_NEXIO] = {
1359 .rept_size = 1024,
1360 .irq_always = true,
1361 .read_data = nexio_read_data,
1362 .alloc = nexio_alloc,
1363 .init = nexio_init,
1364 .exit = nexio_exit,
1365 },
1366#endif
1367#ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
1368 [DEVTYPE_ETOUCH] = {
1369 .min_xc = 0x0,
1370 .max_xc = 0x07ff,
1371 .min_yc = 0x0,
1372 .max_yc = 0x07ff,
1373 .rept_size = 16,
1374 .process_pkt = usbtouch_process_multi,
1375 .get_pkt_len = etouch_get_pkt_len,
1376 .read_data = etouch_read_data,
1377 },
1378#endif
1379};
1380
1381
1382/*****************************************************************************
1383 * Generic Part
1384 */
1385static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
1386 unsigned char *pkt, int len)
1387{
1388 struct usbtouch_device_info *type = usbtouch->type;
1389
1390 if (!type->read_data(usbtouch, pkt))
1391 return;
1392
1393 input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch);
1394
1395 if (swap_xy) {
1396 input_report_abs(usbtouch->input, ABS_X, usbtouch->y);
1397 input_report_abs(usbtouch->input, ABS_Y, usbtouch->x);
1398 } else {
1399 input_report_abs(usbtouch->input, ABS_X, usbtouch->x);
1400 input_report_abs(usbtouch->input, ABS_Y, usbtouch->y);
1401 }
1402 if (type->max_press)
1403 input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press);
1404 input_sync(usbtouch->input);
1405}
1406
1407
1408#ifdef MULTI_PACKET
1409static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1410 unsigned char *pkt, int len)
1411{
1412 unsigned char *buffer;
1413 int pkt_len, pos, buf_len, tmp;
1414
1415 /* process buffer */
1416 if (unlikely(usbtouch->buf_len)) {
1417 /* try to get size */
1418 pkt_len = usbtouch->type->get_pkt_len(
1419 usbtouch->buffer, usbtouch->buf_len);
1420
1421 /* drop? */
1422 if (unlikely(!pkt_len))
1423 goto out_flush_buf;
1424
1425 /* need to append -pkt_len bytes before able to get size */
1426 if (unlikely(pkt_len < 0)) {
1427 int append = -pkt_len;
1428 if (unlikely(append > len))
1429 append = len;
1430 if (usbtouch->buf_len + append >= usbtouch->type->rept_size)
1431 goto out_flush_buf;
1432 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append);
1433 usbtouch->buf_len += append;
1434
1435 pkt_len = usbtouch->type->get_pkt_len(
1436 usbtouch->buffer, usbtouch->buf_len);
1437 if (pkt_len < 0)
1438 return;
1439 }
1440
1441 /* append */
1442 tmp = pkt_len - usbtouch->buf_len;
1443 if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size)
1444 goto out_flush_buf;
1445 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp);
1446 usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len);
1447
1448 buffer = pkt + tmp;
1449 buf_len = len - tmp;
1450 } else {
1451 buffer = pkt;
1452 buf_len = len;
1453 }
1454
1455 /* loop over the received packet, process */
1456 pos = 0;
1457 while (pos < buf_len) {
1458 /* get packet len */
1459 pkt_len = usbtouch->type->get_pkt_len(buffer + pos,
1460 buf_len - pos);
1461
1462 /* unknown packet: skip one byte */
1463 if (unlikely(!pkt_len)) {
1464 pos++;
1465 continue;
1466 }
1467
1468 /* full packet: process */
1469 if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) {
1470 usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len);
1471 } else {
1472 /* incomplete packet: save in buffer */
1473 memcpy(usbtouch->buffer, buffer + pos, buf_len - pos);
1474 usbtouch->buf_len = buf_len - pos;
1475 return;
1476 }
1477 pos += pkt_len;
1478 }
1479
1480out_flush_buf:
1481 usbtouch->buf_len = 0;
1482 return;
1483}
1484#endif
1485
1486
1487static void usbtouch_irq(struct urb *urb)
1488{
1489 struct usbtouch_usb *usbtouch = urb->context;
1490 struct device *dev = &usbtouch->interface->dev;
1491 int retval;
1492
1493 switch (urb->status) {
1494 case 0:
1495 /* success */
1496 break;
1497 case -ETIME:
1498 /* this urb is timing out */
1499 dev_dbg(dev,
1500 "%s - urb timed out - was the device unplugged?\n",
1501 __func__);
1502 return;
1503 case -ECONNRESET:
1504 case -ENOENT:
1505 case -ESHUTDOWN:
1506 case -EPIPE:
1507 /* this urb is terminated, clean up */
1508 dev_dbg(dev, "%s - urb shutting down with status: %d\n",
1509 __func__, urb->status);
1510 return;
1511 default:
1512 dev_dbg(dev, "%s - nonzero urb status received: %d\n",
1513 __func__, urb->status);
1514 goto exit;
1515 }
1516
1517 usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length);
1518
1519exit:
1520 usb_mark_last_busy(interface_to_usbdev(usbtouch->interface));
1521 retval = usb_submit_urb(urb, GFP_ATOMIC);
1522 if (retval)
1523 dev_err(dev, "%s - usb_submit_urb failed with result: %d\n",
1524 __func__, retval);
1525}
1526
1527static int usbtouch_open(struct input_dev *input)
1528{
1529 struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1530 int r;
1531
1532 usbtouch->irq->dev = interface_to_usbdev(usbtouch->interface);
1533
1534 r = usb_autopm_get_interface(usbtouch->interface) ? -EIO : 0;
1535 if (r < 0)
1536 goto out;
1537
1538 mutex_lock(&usbtouch->pm_mutex);
1539 if (!usbtouch->type->irq_always) {
1540 if (usb_submit_urb(usbtouch->irq, GFP_KERNEL)) {
1541 r = -EIO;
1542 goto out_put;
1543 }
1544 }
1545
1546 usbtouch->interface->needs_remote_wakeup = 1;
1547 usbtouch->is_open = true;
1548out_put:
1549 mutex_unlock(&usbtouch->pm_mutex);
1550 usb_autopm_put_interface(usbtouch->interface);
1551out:
1552 return r;
1553}
1554
1555static void usbtouch_close(struct input_dev *input)
1556{
1557 struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1558 int r;
1559
1560 mutex_lock(&usbtouch->pm_mutex);
1561 if (!usbtouch->type->irq_always)
1562 usb_kill_urb(usbtouch->irq);
1563 usbtouch->is_open = false;
1564 mutex_unlock(&usbtouch->pm_mutex);
1565
1566 r = usb_autopm_get_interface(usbtouch->interface);
1567 usbtouch->interface->needs_remote_wakeup = 0;
1568 if (!r)
1569 usb_autopm_put_interface(usbtouch->interface);
1570}
1571
1572static int usbtouch_suspend
1573(struct usb_interface *intf, pm_message_t message)
1574{
1575 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1576
1577 usb_kill_urb(usbtouch->irq);
1578
1579 return 0;
1580}
1581
1582static int usbtouch_resume(struct usb_interface *intf)
1583{
1584 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1585 int result = 0;
1586
1587 mutex_lock(&usbtouch->pm_mutex);
1588 if (usbtouch->is_open || usbtouch->type->irq_always)
1589 result = usb_submit_urb(usbtouch->irq, GFP_NOIO);
1590 mutex_unlock(&usbtouch->pm_mutex);
1591
1592 return result;
1593}
1594
1595static int usbtouch_reset_resume(struct usb_interface *intf)
1596{
1597 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1598 int err = 0;
1599
1600 /* reinit the device */
1601 if (usbtouch->type->init) {
1602 err = usbtouch->type->init(usbtouch);
1603 if (err) {
1604 dev_dbg(&intf->dev,
1605 "%s - type->init() failed, err: %d\n",
1606 __func__, err);
1607 return err;
1608 }
1609 }
1610
1611 /* restart IO if needed */
1612 mutex_lock(&usbtouch->pm_mutex);
1613 if (usbtouch->is_open)
1614 err = usb_submit_urb(usbtouch->irq, GFP_NOIO);
1615 mutex_unlock(&usbtouch->pm_mutex);
1616
1617 return err;
1618}
1619
1620static void usbtouch_free_buffers(struct usb_device *udev,
1621 struct usbtouch_usb *usbtouch)
1622{
1623 usb_free_coherent(udev, usbtouch->data_size,
1624 usbtouch->data, usbtouch->data_dma);
1625 kfree(usbtouch->buffer);
1626}
1627
1628static struct usb_endpoint_descriptor *
1629usbtouch_get_input_endpoint(struct usb_host_interface *interface)
1630{
1631 int i;
1632
1633 for (i = 0; i < interface->desc.bNumEndpoints; i++)
1634 if (usb_endpoint_dir_in(&interface->endpoint[i].desc))
1635 return &interface->endpoint[i].desc;
1636
1637 return NULL;
1638}
1639
1640static int usbtouch_probe(struct usb_interface *intf,
1641 const struct usb_device_id *id)
1642{
1643 struct usbtouch_usb *usbtouch;
1644 struct input_dev *input_dev;
1645 struct usb_endpoint_descriptor *endpoint;
1646 struct usb_device *udev = interface_to_usbdev(intf);
1647 struct usbtouch_device_info *type;
1648 int err = -ENOMEM;
1649
1650 /* some devices are ignored */
1651 if (id->driver_info == DEVTYPE_IGNORE)
1652 return -ENODEV;
1653
1654 endpoint = usbtouch_get_input_endpoint(intf->cur_altsetting);
1655 if (!endpoint)
1656 return -ENXIO;
1657
1658 usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL);
1659 input_dev = input_allocate_device();
1660 if (!usbtouch || !input_dev)
1661 goto out_free;
1662
1663 mutex_init(&usbtouch->pm_mutex);
1664
1665 type = &usbtouch_dev_info[id->driver_info];
1666 usbtouch->type = type;
1667 if (!type->process_pkt)
1668 type->process_pkt = usbtouch_process_pkt;
1669
1670 usbtouch->data_size = type->rept_size;
1671 if (type->get_pkt_len) {
1672 /*
1673 * When dealing with variable-length packets we should
1674 * not request more than wMaxPacketSize bytes at once
1675 * as we do not know if there is more data coming or
1676 * we filled exactly wMaxPacketSize bytes and there is
1677 * nothing else.
1678 */
1679 usbtouch->data_size = min(usbtouch->data_size,
1680 usb_endpoint_maxp(endpoint));
1681 }
1682
1683 usbtouch->data = usb_alloc_coherent(udev, usbtouch->data_size,
1684 GFP_KERNEL, &usbtouch->data_dma);
1685 if (!usbtouch->data)
1686 goto out_free;
1687
1688 if (type->get_pkt_len) {
1689 usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL);
1690 if (!usbtouch->buffer)
1691 goto out_free_buffers;
1692 }
1693
1694 usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
1695 if (!usbtouch->irq) {
1696 dev_dbg(&intf->dev,
1697 "%s - usb_alloc_urb failed: usbtouch->irq\n", __func__);
1698 goto out_free_buffers;
1699 }
1700
1701 usbtouch->interface = intf;
1702 usbtouch->input = input_dev;
1703
1704 if (udev->manufacturer)
1705 strlcpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name));
1706
1707 if (udev->product) {
1708 if (udev->manufacturer)
1709 strlcat(usbtouch->name, " ", sizeof(usbtouch->name));
1710 strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name));
1711 }
1712
1713 if (!strlen(usbtouch->name))
1714 snprintf(usbtouch->name, sizeof(usbtouch->name),
1715 "USB Touchscreen %04x:%04x",
1716 le16_to_cpu(udev->descriptor.idVendor),
1717 le16_to_cpu(udev->descriptor.idProduct));
1718
1719 usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys));
1720 strlcat(usbtouch->phys, "/input0", sizeof(usbtouch->phys));
1721
1722 input_dev->name = usbtouch->name;
1723 input_dev->phys = usbtouch->phys;
1724 usb_to_input_id(udev, &input_dev->id);
1725 input_dev->dev.parent = &intf->dev;
1726
1727 input_set_drvdata(input_dev, usbtouch);
1728
1729 input_dev->open = usbtouch_open;
1730 input_dev->close = usbtouch_close;
1731
1732 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
1733 input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
1734 input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0);
1735 input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0);
1736 if (type->max_press)
1737 input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press,
1738 type->max_press, 0, 0);
1739
1740 if (usb_endpoint_type(endpoint) == USB_ENDPOINT_XFER_INT)
1741 usb_fill_int_urb(usbtouch->irq, udev,
1742 usb_rcvintpipe(udev, endpoint->bEndpointAddress),
1743 usbtouch->data, usbtouch->data_size,
1744 usbtouch_irq, usbtouch, endpoint->bInterval);
1745 else
1746 usb_fill_bulk_urb(usbtouch->irq, udev,
1747 usb_rcvbulkpipe(udev, endpoint->bEndpointAddress),
1748 usbtouch->data, usbtouch->data_size,
1749 usbtouch_irq, usbtouch);
1750
1751 usbtouch->irq->dev = udev;
1752 usbtouch->irq->transfer_dma = usbtouch->data_dma;
1753 usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1754
1755 /* device specific allocations */
1756 if (type->alloc) {
1757 err = type->alloc(usbtouch);
1758 if (err) {
1759 dev_dbg(&intf->dev,
1760 "%s - type->alloc() failed, err: %d\n",
1761 __func__, err);
1762 goto out_free_urb;
1763 }
1764 }
1765
1766 /* device specific initialisation*/
1767 if (type->init) {
1768 err = type->init(usbtouch);
1769 if (err) {
1770 dev_dbg(&intf->dev,
1771 "%s - type->init() failed, err: %d\n",
1772 __func__, err);
1773 goto out_do_exit;
1774 }
1775 }
1776
1777 err = input_register_device(usbtouch->input);
1778 if (err) {
1779 dev_dbg(&intf->dev,
1780 "%s - input_register_device failed, err: %d\n",
1781 __func__, err);
1782 goto out_do_exit;
1783 }
1784
1785 usb_set_intfdata(intf, usbtouch);
1786
1787 if (usbtouch->type->irq_always) {
1788 /* this can't fail */
1789 usb_autopm_get_interface(intf);
1790 err = usb_submit_urb(usbtouch->irq, GFP_KERNEL);
1791 if (err) {
1792 usb_autopm_put_interface(intf);
1793 dev_err(&intf->dev,
1794 "%s - usb_submit_urb failed with result: %d\n",
1795 __func__, err);
1796 goto out_unregister_input;
1797 }
1798 }
1799
1800 return 0;
1801
1802out_unregister_input:
1803 input_unregister_device(input_dev);
1804 input_dev = NULL;
1805out_do_exit:
1806 if (type->exit)
1807 type->exit(usbtouch);
1808out_free_urb:
1809 usb_free_urb(usbtouch->irq);
1810out_free_buffers:
1811 usbtouch_free_buffers(udev, usbtouch);
1812out_free:
1813 input_free_device(input_dev);
1814 kfree(usbtouch);
1815 return err;
1816}
1817
1818static void usbtouch_disconnect(struct usb_interface *intf)
1819{
1820 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1821
1822 if (!usbtouch)
1823 return;
1824
1825 dev_dbg(&intf->dev,
1826 "%s - usbtouch is initialized, cleaning up\n", __func__);
1827
1828 usb_set_intfdata(intf, NULL);
1829 /* this will stop IO via close */
1830 input_unregister_device(usbtouch->input);
1831 usb_free_urb(usbtouch->irq);
1832 if (usbtouch->type->exit)
1833 usbtouch->type->exit(usbtouch);
1834 usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch);
1835 kfree(usbtouch);
1836}
1837
1838MODULE_DEVICE_TABLE(usb, usbtouch_devices);
1839
1840static struct usb_driver usbtouch_driver = {
1841 .name = "usbtouchscreen",
1842 .probe = usbtouch_probe,
1843 .disconnect = usbtouch_disconnect,
1844 .suspend = usbtouch_suspend,
1845 .resume = usbtouch_resume,
1846 .reset_resume = usbtouch_reset_resume,
1847 .id_table = usbtouch_devices,
1848 .supports_autosuspend = 1,
1849};
1850
1851module_usb_driver(usbtouch_driver);
1852
1853MODULE_AUTHOR("Daniel Ritz <daniel.ritz@gmx.ch>");
1854MODULE_DESCRIPTION("USB Touchscreen Driver");
1855MODULE_LICENSE("GPL");
1856
1857MODULE_ALIAS("touchkitusb");
1858MODULE_ALIAS("itmtouch");
1859MODULE_ALIAS("mtouchusb");