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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 * - Elo TouchSystems 2700 IntelliTouch
20 * - EasyTouch USB Dual/Multi touch controller from Data Modul
21 *
22 * Copyright (C) 2004-2007 by Daniel Ritz <daniel.ritz@gmx.ch>
23 * Copyright (C) by Todd E. Johnson (mtouchusb.c)
24 *
25 * This program is free software; you can redistribute it and/or
26 * modify it under the terms of the GNU General Public License as
27 * published by the Free Software Foundation; either version 2 of the
28 * License, or (at your option) any later version.
29 *
30 * This program is distributed in the hope that it will be useful, but
31 * WITHOUT ANY WARRANTY; without even the implied warranty of
32 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
33 * General Public License for more details.
34 *
35 * You should have received a copy of the GNU General Public License
36 * along with this program; if not, write to the Free Software
37 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
38 *
39 * Driver is based on touchkitusb.c
40 * - ITM parts are from itmtouch.c
41 * - 3M parts are from mtouchusb.c
42 * - PanJit parts are from an unmerged driver by Lanslott Gish
43 * - DMC TSC 10/25 are from Holger Schurig, with ideas from an unmerged
44 * driver from Marius Vollmer
45 *
46 *****************************************************************************/
47
48//#define DEBUG
49
50#include <linux/kernel.h>
51#include <linux/slab.h>
52#include <linux/input.h>
53#include <linux/module.h>
54#include <linux/usb.h>
55#include <linux/usb/input.h>
56#include <linux/hid.h>
57
58
59#define DRIVER_VERSION "v0.6"
60#define DRIVER_AUTHOR "Daniel Ritz <daniel.ritz@gmx.ch>"
61#define DRIVER_DESC "USB Touchscreen Driver"
62
63static bool swap_xy;
64module_param(swap_xy, bool, 0644);
65MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");
66
67static bool hwcalib_xy;
68module_param(hwcalib_xy, bool, 0644);
69MODULE_PARM_DESC(hwcalib_xy, "If set hw-calibrated X/Y are used if available");
70
71/* device specifc data/functions */
72struct usbtouch_usb;
73struct usbtouch_device_info {
74 int min_xc, max_xc;
75 int min_yc, max_yc;
76 int min_press, max_press;
77 int rept_size;
78
79 /*
80 * Always service the USB devices irq not just when the input device is
81 * open. This is useful when devices have a watchdog which prevents us
82 * from periodically polling the device. Leave this unset unless your
83 * touchscreen device requires it, as it does consume more of the USB
84 * bandwidth.
85 */
86 bool irq_always;
87
88 void (*process_pkt) (struct usbtouch_usb *usbtouch, unsigned char *pkt, int len);
89
90 /*
91 * used to get the packet len. possible return values:
92 * > 0: packet len
93 * = 0: skip one byte
94 * < 0: -return value more bytes needed
95 */
96 int (*get_pkt_len) (unsigned char *pkt, int len);
97
98 int (*read_data) (struct usbtouch_usb *usbtouch, unsigned char *pkt);
99 int (*alloc) (struct usbtouch_usb *usbtouch);
100 int (*init) (struct usbtouch_usb *usbtouch);
101 void (*exit) (struct usbtouch_usb *usbtouch);
102};
103
104/* a usbtouch device */
105struct usbtouch_usb {
106 unsigned char *data;
107 dma_addr_t data_dma;
108 int data_size;
109 unsigned char *buffer;
110 int buf_len;
111 struct urb *irq;
112 struct usb_interface *interface;
113 struct input_dev *input;
114 struct usbtouch_device_info *type;
115 char name[128];
116 char phys[64];
117 void *priv;
118
119 int x, y;
120 int touch, press;
121};
122
123
124/* device types */
125enum {
126 DEVTYPE_IGNORE = -1,
127 DEVTYPE_EGALAX,
128 DEVTYPE_PANJIT,
129 DEVTYPE_3M,
130 DEVTYPE_ITM,
131 DEVTYPE_ETURBO,
132 DEVTYPE_GUNZE,
133 DEVTYPE_DMC_TSC10,
134 DEVTYPE_IRTOUCH,
135 DEVTYPE_IDEALTEK,
136 DEVTYPE_GENERAL_TOUCH,
137 DEVTYPE_GOTOP,
138 DEVTYPE_JASTEC,
139 DEVTYPE_E2I,
140 DEVTYPE_ZYTRONIC,
141 DEVTYPE_TC45USB,
142 DEVTYPE_NEXIO,
143 DEVTYPE_ELO,
144 DEVTYPE_ETOUCH,
145};
146
147#define USB_DEVICE_HID_CLASS(vend, prod) \
148 .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS \
149 | USB_DEVICE_ID_MATCH_DEVICE, \
150 .idVendor = (vend), \
151 .idProduct = (prod), \
152 .bInterfaceClass = USB_INTERFACE_CLASS_HID
153
154static const struct usb_device_id usbtouch_devices[] = {
155#ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
156 /* ignore the HID capable devices, handled by usbhid */
157 {USB_DEVICE_HID_CLASS(0x0eef, 0x0001), .driver_info = DEVTYPE_IGNORE},
158 {USB_DEVICE_HID_CLASS(0x0eef, 0x0002), .driver_info = DEVTYPE_IGNORE},
159
160 /* normal device IDs */
161 {USB_DEVICE(0x3823, 0x0001), .driver_info = DEVTYPE_EGALAX},
162 {USB_DEVICE(0x3823, 0x0002), .driver_info = DEVTYPE_EGALAX},
163 {USB_DEVICE(0x0123, 0x0001), .driver_info = DEVTYPE_EGALAX},
164 {USB_DEVICE(0x0eef, 0x0001), .driver_info = DEVTYPE_EGALAX},
165 {USB_DEVICE(0x0eef, 0x0002), .driver_info = DEVTYPE_EGALAX},
166 {USB_DEVICE(0x1234, 0x0001), .driver_info = DEVTYPE_EGALAX},
167 {USB_DEVICE(0x1234, 0x0002), .driver_info = DEVTYPE_EGALAX},
168#endif
169
170#ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
171 {USB_DEVICE(0x134c, 0x0001), .driver_info = DEVTYPE_PANJIT},
172 {USB_DEVICE(0x134c, 0x0002), .driver_info = DEVTYPE_PANJIT},
173 {USB_DEVICE(0x134c, 0x0003), .driver_info = DEVTYPE_PANJIT},
174 {USB_DEVICE(0x134c, 0x0004), .driver_info = DEVTYPE_PANJIT},
175#endif
176
177#ifdef CONFIG_TOUCHSCREEN_USB_3M
178 {USB_DEVICE(0x0596, 0x0001), .driver_info = DEVTYPE_3M},
179#endif
180
181#ifdef CONFIG_TOUCHSCREEN_USB_ITM
182 {USB_DEVICE(0x0403, 0xf9e9), .driver_info = DEVTYPE_ITM},
183 {USB_DEVICE(0x16e3, 0xf9e9), .driver_info = DEVTYPE_ITM},
184#endif
185
186#ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
187 {USB_DEVICE(0x1234, 0x5678), .driver_info = DEVTYPE_ETURBO},
188#endif
189
190#ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
191 {USB_DEVICE(0x0637, 0x0001), .driver_info = DEVTYPE_GUNZE},
192#endif
193
194#ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
195 {USB_DEVICE(0x0afa, 0x03e8), .driver_info = DEVTYPE_DMC_TSC10},
196#endif
197
198#ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
199 {USB_DEVICE(0x595a, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
200 {USB_DEVICE(0x6615, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
201#endif
202
203#ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
204 {USB_DEVICE(0x1391, 0x1000), .driver_info = DEVTYPE_IDEALTEK},
205#endif
206
207#ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
208 {USB_DEVICE(0x0dfc, 0x0001), .driver_info = DEVTYPE_GENERAL_TOUCH},
209#endif
210
211#ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
212 {USB_DEVICE(0x08f2, 0x007f), .driver_info = DEVTYPE_GOTOP},
213 {USB_DEVICE(0x08f2, 0x00ce), .driver_info = DEVTYPE_GOTOP},
214 {USB_DEVICE(0x08f2, 0x00f4), .driver_info = DEVTYPE_GOTOP},
215#endif
216
217#ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
218 {USB_DEVICE(0x0f92, 0x0001), .driver_info = DEVTYPE_JASTEC},
219#endif
220
221#ifdef CONFIG_TOUCHSCREEN_USB_E2I
222 {USB_DEVICE(0x1ac7, 0x0001), .driver_info = DEVTYPE_E2I},
223#endif
224
225#ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
226 {USB_DEVICE(0x14c8, 0x0003), .driver_info = DEVTYPE_ZYTRONIC},
227#endif
228
229#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
230 /* TC5UH */
231 {USB_DEVICE(0x0664, 0x0309), .driver_info = DEVTYPE_TC45USB},
232 /* TC4UM */
233 {USB_DEVICE(0x0664, 0x0306), .driver_info = DEVTYPE_TC45USB},
234#endif
235
236#ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
237 /* data interface only */
238 {USB_DEVICE_AND_INTERFACE_INFO(0x10f0, 0x2002, 0x0a, 0x00, 0x00),
239 .driver_info = DEVTYPE_NEXIO},
240 {USB_DEVICE_AND_INTERFACE_INFO(0x1870, 0x0001, 0x0a, 0x00, 0x00),
241 .driver_info = DEVTYPE_NEXIO},
242#endif
243
244#ifdef CONFIG_TOUCHSCREEN_USB_ELO
245 {USB_DEVICE(0x04e7, 0x0020), .driver_info = DEVTYPE_ELO},
246#endif
247
248#ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
249 {USB_DEVICE(0x7374, 0x0001), .driver_info = DEVTYPE_ETOUCH},
250#endif
251
252 {}
253};
254
255
256/*****************************************************************************
257 * e2i Part
258 */
259
260#ifdef CONFIG_TOUCHSCREEN_USB_E2I
261static int e2i_init(struct usbtouch_usb *usbtouch)
262{
263 int ret;
264 struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
265
266 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
267 0x01, 0x02, 0x0000, 0x0081,
268 NULL, 0, USB_CTRL_SET_TIMEOUT);
269
270 dev_dbg(&usbtouch->interface->dev,
271 "%s - usb_control_msg - E2I_RESET - bytes|err: %d\n",
272 __func__, ret);
273 return ret;
274}
275
276static int e2i_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
277{
278 int tmp = (pkt[0] << 8) | pkt[1];
279 dev->x = (pkt[2] << 8) | pkt[3];
280 dev->y = (pkt[4] << 8) | pkt[5];
281
282 tmp = tmp - 0xA000;
283 dev->touch = (tmp > 0);
284 dev->press = (tmp > 0 ? tmp : 0);
285
286 return 1;
287}
288#endif
289
290
291/*****************************************************************************
292 * eGalax part
293 */
294
295#ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
296
297#ifndef MULTI_PACKET
298#define MULTI_PACKET
299#endif
300
301#define EGALAX_PKT_TYPE_MASK 0xFE
302#define EGALAX_PKT_TYPE_REPT 0x80
303#define EGALAX_PKT_TYPE_DIAG 0x0A
304
305static int egalax_init(struct usbtouch_usb *usbtouch)
306{
307 int ret, i;
308 unsigned char *buf;
309 struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
310
311 /*
312 * An eGalax diagnostic packet kicks the device into using the right
313 * protocol. We send a "check active" packet. The response will be
314 * read later and ignored.
315 */
316
317 buf = kmalloc(3, GFP_KERNEL);
318 if (!buf)
319 return -ENOMEM;
320
321 buf[0] = EGALAX_PKT_TYPE_DIAG;
322 buf[1] = 1; /* length */
323 buf[2] = 'A'; /* command - check active */
324
325 for (i = 0; i < 3; i++) {
326 ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
327 0,
328 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
329 0, 0, buf, 3,
330 USB_CTRL_SET_TIMEOUT);
331 if (ret >= 0) {
332 ret = 0;
333 break;
334 }
335 if (ret != -EPIPE)
336 break;
337 }
338
339 kfree(buf);
340
341 return ret;
342}
343
344static int egalax_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
345{
346 if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT)
347 return 0;
348
349 dev->x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F);
350 dev->y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F);
351 dev->touch = pkt[0] & 0x01;
352
353 return 1;
354}
355
356static int egalax_get_pkt_len(unsigned char *buf, int len)
357{
358 switch (buf[0] & EGALAX_PKT_TYPE_MASK) {
359 case EGALAX_PKT_TYPE_REPT:
360 return 5;
361
362 case EGALAX_PKT_TYPE_DIAG:
363 if (len < 2)
364 return -1;
365
366 return buf[1] + 2;
367 }
368
369 return 0;
370}
371#endif
372
373/*****************************************************************************
374 * EasyTouch part
375 */
376
377#ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
378
379#ifndef MULTI_PACKET
380#define MULTI_PACKET
381#endif
382
383#define ETOUCH_PKT_TYPE_MASK 0xFE
384#define ETOUCH_PKT_TYPE_REPT 0x80
385#define ETOUCH_PKT_TYPE_REPT2 0xB0
386#define ETOUCH_PKT_TYPE_DIAG 0x0A
387
388static int etouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
389{
390 if ((pkt[0] & ETOUCH_PKT_TYPE_MASK) != ETOUCH_PKT_TYPE_REPT &&
391 (pkt[0] & ETOUCH_PKT_TYPE_MASK) != ETOUCH_PKT_TYPE_REPT2)
392 return 0;
393
394 dev->x = ((pkt[1] & 0x1F) << 7) | (pkt[2] & 0x7F);
395 dev->y = ((pkt[3] & 0x1F) << 7) | (pkt[4] & 0x7F);
396 dev->touch = pkt[0] & 0x01;
397
398 return 1;
399}
400
401static int etouch_get_pkt_len(unsigned char *buf, int len)
402{
403 switch (buf[0] & ETOUCH_PKT_TYPE_MASK) {
404 case ETOUCH_PKT_TYPE_REPT:
405 case ETOUCH_PKT_TYPE_REPT2:
406 return 5;
407
408 case ETOUCH_PKT_TYPE_DIAG:
409 if (len < 2)
410 return -1;
411
412 return buf[1] + 2;
413 }
414
415 return 0;
416}
417#endif
418
419/*****************************************************************************
420 * PanJit Part
421 */
422#ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
423static int panjit_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
424{
425 dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
426 dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
427 dev->touch = pkt[0] & 0x01;
428
429 return 1;
430}
431#endif
432
433
434/*****************************************************************************
435 * 3M/Microtouch Part
436 */
437#ifdef CONFIG_TOUCHSCREEN_USB_3M
438
439#define MTOUCHUSB_ASYNC_REPORT 1
440#define MTOUCHUSB_RESET 7
441#define MTOUCHUSB_REQ_CTRLLR_ID 10
442
443static int mtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
444{
445 if (hwcalib_xy) {
446 dev->x = (pkt[4] << 8) | pkt[3];
447 dev->y = 0xffff - ((pkt[6] << 8) | pkt[5]);
448 } else {
449 dev->x = (pkt[8] << 8) | pkt[7];
450 dev->y = (pkt[10] << 8) | pkt[9];
451 }
452 dev->touch = (pkt[2] & 0x40) ? 1 : 0;
453
454 return 1;
455}
456
457static int mtouch_init(struct usbtouch_usb *usbtouch)
458{
459 int ret, i;
460 struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
461
462 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
463 MTOUCHUSB_RESET,
464 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
465 1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
466 dev_dbg(&usbtouch->interface->dev,
467 "%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d\n",
468 __func__, ret);
469 if (ret < 0)
470 return ret;
471 msleep(150);
472
473 for (i = 0; i < 3; i++) {
474 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
475 MTOUCHUSB_ASYNC_REPORT,
476 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
477 1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT);
478 dev_dbg(&usbtouch->interface->dev,
479 "%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d\n",
480 __func__, ret);
481 if (ret >= 0)
482 break;
483 if (ret != -EPIPE)
484 return ret;
485 }
486
487 /* Default min/max xy are the raw values, override if using hw-calib */
488 if (hwcalib_xy) {
489 input_set_abs_params(usbtouch->input, ABS_X, 0, 0xffff, 0, 0);
490 input_set_abs_params(usbtouch->input, ABS_Y, 0, 0xffff, 0, 0);
491 }
492
493 return 0;
494}
495#endif
496
497
498/*****************************************************************************
499 * ITM Part
500 */
501#ifdef CONFIG_TOUCHSCREEN_USB_ITM
502static int itm_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
503{
504 int touch;
505 /*
506 * ITM devices report invalid x/y data if not touched.
507 * if the screen was touched before but is not touched any more
508 * report touch as 0 with the last valid x/y data once. then stop
509 * reporting data until touched again.
510 */
511 dev->press = ((pkt[2] & 0x01) << 7) | (pkt[5] & 0x7F);
512
513 touch = ~pkt[7] & 0x20;
514 if (!touch) {
515 if (dev->touch) {
516 dev->touch = 0;
517 return 1;
518 }
519
520 return 0;
521 }
522
523 dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F);
524 dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F);
525 dev->touch = touch;
526
527 return 1;
528}
529#endif
530
531
532/*****************************************************************************
533 * eTurboTouch part
534 */
535#ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
536#ifndef MULTI_PACKET
537#define MULTI_PACKET
538#endif
539static int eturbo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
540{
541 unsigned int shift;
542
543 /* packets should start with sync */
544 if (!(pkt[0] & 0x80))
545 return 0;
546
547 shift = (6 - (pkt[0] & 0x03));
548 dev->x = ((pkt[3] << 7) | pkt[4]) >> shift;
549 dev->y = ((pkt[1] << 7) | pkt[2]) >> shift;
550 dev->touch = (pkt[0] & 0x10) ? 1 : 0;
551
552 return 1;
553}
554
555static int eturbo_get_pkt_len(unsigned char *buf, int len)
556{
557 if (buf[0] & 0x80)
558 return 5;
559 if (buf[0] == 0x01)
560 return 3;
561 return 0;
562}
563#endif
564
565
566/*****************************************************************************
567 * Gunze part
568 */
569#ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
570static int gunze_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
571{
572 if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80))
573 return 0;
574
575 dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F);
576 dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F);
577 dev->touch = pkt[0] & 0x20;
578
579 return 1;
580}
581#endif
582
583/*****************************************************************************
584 * DMC TSC-10/25 Part
585 *
586 * Documentation about the controller and it's protocol can be found at
587 * http://www.dmccoltd.com/files/controler/tsc10usb_pi_e.pdf
588 * http://www.dmccoltd.com/files/controler/tsc25_usb_e.pdf
589 */
590#ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
591
592/* supported data rates. currently using 130 */
593#define TSC10_RATE_POINT 0x50
594#define TSC10_RATE_30 0x40
595#define TSC10_RATE_50 0x41
596#define TSC10_RATE_80 0x42
597#define TSC10_RATE_100 0x43
598#define TSC10_RATE_130 0x44
599#define TSC10_RATE_150 0x45
600
601/* commands */
602#define TSC10_CMD_RESET 0x55
603#define TSC10_CMD_RATE 0x05
604#define TSC10_CMD_DATA1 0x01
605
606static int dmc_tsc10_init(struct usbtouch_usb *usbtouch)
607{
608 struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
609 int ret = -ENOMEM;
610 unsigned char *buf;
611
612 buf = kmalloc(2, GFP_NOIO);
613 if (!buf)
614 goto err_nobuf;
615 /* reset */
616 buf[0] = buf[1] = 0xFF;
617 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
618 TSC10_CMD_RESET,
619 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
620 0, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
621 if (ret < 0)
622 goto err_out;
623 if (buf[0] != 0x06) {
624 ret = -ENODEV;
625 goto err_out;
626 }
627
628 /* set coordinate output rate */
629 buf[0] = buf[1] = 0xFF;
630 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
631 TSC10_CMD_RATE,
632 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
633 TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
634 if (ret < 0)
635 goto err_out;
636 if ((buf[0] != 0x06) && (buf[0] != 0x15 || buf[1] != 0x01)) {
637 ret = -ENODEV;
638 goto err_out;
639 }
640
641 /* start sending data */
642 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
643 TSC10_CMD_DATA1,
644 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
645 0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
646err_out:
647 kfree(buf);
648err_nobuf:
649 return ret;
650}
651
652
653static int dmc_tsc10_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
654{
655 dev->x = ((pkt[2] & 0x03) << 8) | pkt[1];
656 dev->y = ((pkt[4] & 0x03) << 8) | pkt[3];
657 dev->touch = pkt[0] & 0x01;
658
659 return 1;
660}
661#endif
662
663
664/*****************************************************************************
665 * IRTOUCH Part
666 */
667#ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
668static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
669{
670 dev->x = (pkt[3] << 8) | pkt[2];
671 dev->y = (pkt[5] << 8) | pkt[4];
672 dev->touch = (pkt[1] & 0x03) ? 1 : 0;
673
674 return 1;
675}
676#endif
677
678/*****************************************************************************
679 * ET&T TC5UH/TC4UM part
680 */
681#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
682static int tc45usb_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
683{
684 dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
685 dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
686 dev->touch = pkt[0] & 0x01;
687
688 return 1;
689}
690#endif
691
692/*****************************************************************************
693 * IdealTEK URTC1000 Part
694 */
695#ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
696#ifndef MULTI_PACKET
697#define MULTI_PACKET
698#endif
699static int idealtek_get_pkt_len(unsigned char *buf, int len)
700{
701 if (buf[0] & 0x80)
702 return 5;
703 if (buf[0] == 0x01)
704 return len;
705 return 0;
706}
707
708static int idealtek_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
709{
710 switch (pkt[0] & 0x98) {
711 case 0x88:
712 /* touch data in IdealTEK mode */
713 dev->x = (pkt[1] << 5) | (pkt[2] >> 2);
714 dev->y = (pkt[3] << 5) | (pkt[4] >> 2);
715 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
716 return 1;
717
718 case 0x98:
719 /* touch data in MT emulation mode */
720 dev->x = (pkt[2] << 5) | (pkt[1] >> 2);
721 dev->y = (pkt[4] << 5) | (pkt[3] >> 2);
722 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
723 return 1;
724
725 default:
726 return 0;
727 }
728}
729#endif
730
731/*****************************************************************************
732 * General Touch Part
733 */
734#ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
735static int general_touch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
736{
737 dev->x = (pkt[2] << 8) | pkt[1];
738 dev->y = (pkt[4] << 8) | pkt[3];
739 dev->press = pkt[5] & 0xff;
740 dev->touch = pkt[0] & 0x01;
741
742 return 1;
743}
744#endif
745
746/*****************************************************************************
747 * GoTop Part
748 */
749#ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
750static int gotop_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
751{
752 dev->x = ((pkt[1] & 0x38) << 4) | pkt[2];
753 dev->y = ((pkt[1] & 0x07) << 7) | pkt[3];
754 dev->touch = pkt[0] & 0x01;
755
756 return 1;
757}
758#endif
759
760/*****************************************************************************
761 * JASTEC Part
762 */
763#ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
764static int jastec_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
765{
766 dev->x = ((pkt[0] & 0x3f) << 6) | (pkt[2] & 0x3f);
767 dev->y = ((pkt[1] & 0x3f) << 6) | (pkt[3] & 0x3f);
768 dev->touch = (pkt[0] & 0x40) >> 6;
769
770 return 1;
771}
772#endif
773
774/*****************************************************************************
775 * Zytronic Part
776 */
777#ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
778static int zytronic_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
779{
780 struct usb_interface *intf = dev->interface;
781
782 switch (pkt[0]) {
783 case 0x3A: /* command response */
784 dev_dbg(&intf->dev, "%s: Command response %d\n", __func__, pkt[1]);
785 break;
786
787 case 0xC0: /* down */
788 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
789 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
790 dev->touch = 1;
791 dev_dbg(&intf->dev, "%s: down %d,%d\n", __func__, dev->x, dev->y);
792 return 1;
793
794 case 0x80: /* up */
795 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
796 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
797 dev->touch = 0;
798 dev_dbg(&intf->dev, "%s: up %d,%d\n", __func__, dev->x, dev->y);
799 return 1;
800
801 default:
802 dev_dbg(&intf->dev, "%s: Unknown return %d\n", __func__, pkt[0]);
803 break;
804 }
805
806 return 0;
807}
808#endif
809
810/*****************************************************************************
811 * NEXIO Part
812 */
813#ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
814
815#define NEXIO_TIMEOUT 5000
816#define NEXIO_BUFSIZE 1024
817#define NEXIO_THRESHOLD 50
818
819struct nexio_priv {
820 struct urb *ack;
821 unsigned char *ack_buf;
822};
823
824struct nexio_touch_packet {
825 u8 flags; /* 0xe1 = touch, 0xe1 = release */
826 __be16 data_len; /* total bytes of touch data */
827 __be16 x_len; /* bytes for X axis */
828 __be16 y_len; /* bytes for Y axis */
829 u8 data[];
830} __attribute__ ((packed));
831
832static unsigned char nexio_ack_pkt[2] = { 0xaa, 0x02 };
833static unsigned char nexio_init_pkt[4] = { 0x82, 0x04, 0x0a, 0x0f };
834
835static void nexio_ack_complete(struct urb *urb)
836{
837}
838
839static int nexio_alloc(struct usbtouch_usb *usbtouch)
840{
841 struct nexio_priv *priv;
842 int ret = -ENOMEM;
843
844 usbtouch->priv = kmalloc(sizeof(struct nexio_priv), GFP_KERNEL);
845 if (!usbtouch->priv)
846 goto out_buf;
847
848 priv = usbtouch->priv;
849
850 priv->ack_buf = kmemdup(nexio_ack_pkt, sizeof(nexio_ack_pkt),
851 GFP_KERNEL);
852 if (!priv->ack_buf)
853 goto err_priv;
854
855 priv->ack = usb_alloc_urb(0, GFP_KERNEL);
856 if (!priv->ack) {
857 dev_dbg(&usbtouch->interface->dev,
858 "%s - usb_alloc_urb failed: usbtouch->ack\n", __func__);
859 goto err_ack_buf;
860 }
861
862 return 0;
863
864err_ack_buf:
865 kfree(priv->ack_buf);
866err_priv:
867 kfree(priv);
868out_buf:
869 return ret;
870}
871
872static int nexio_init(struct usbtouch_usb *usbtouch)
873{
874 struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
875 struct usb_host_interface *interface = usbtouch->interface->cur_altsetting;
876 struct nexio_priv *priv = usbtouch->priv;
877 int ret = -ENOMEM;
878 int actual_len, i;
879 unsigned char *buf;
880 char *firmware_ver = NULL, *device_name = NULL;
881 int input_ep = 0, output_ep = 0;
882
883 /* find first input and output endpoint */
884 for (i = 0; i < interface->desc.bNumEndpoints; i++) {
885 if (!input_ep &&
886 usb_endpoint_dir_in(&interface->endpoint[i].desc))
887 input_ep = interface->endpoint[i].desc.bEndpointAddress;
888 if (!output_ep &&
889 usb_endpoint_dir_out(&interface->endpoint[i].desc))
890 output_ep = interface->endpoint[i].desc.bEndpointAddress;
891 }
892 if (!input_ep || !output_ep)
893 return -ENXIO;
894
895 buf = kmalloc(NEXIO_BUFSIZE, GFP_NOIO);
896 if (!buf)
897 goto out_buf;
898
899 /* two empty reads */
900 for (i = 0; i < 2; i++) {
901 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
902 buf, NEXIO_BUFSIZE, &actual_len,
903 NEXIO_TIMEOUT);
904 if (ret < 0)
905 goto out_buf;
906 }
907
908 /* send init command */
909 memcpy(buf, nexio_init_pkt, sizeof(nexio_init_pkt));
910 ret = usb_bulk_msg(dev, usb_sndbulkpipe(dev, output_ep),
911 buf, sizeof(nexio_init_pkt), &actual_len,
912 NEXIO_TIMEOUT);
913 if (ret < 0)
914 goto out_buf;
915
916 /* read replies */
917 for (i = 0; i < 3; i++) {
918 memset(buf, 0, NEXIO_BUFSIZE);
919 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
920 buf, NEXIO_BUFSIZE, &actual_len,
921 NEXIO_TIMEOUT);
922 if (ret < 0 || actual_len < 1 || buf[1] != actual_len)
923 continue;
924 switch (buf[0]) {
925 case 0x83: /* firmware version */
926 if (!firmware_ver)
927 firmware_ver = kstrdup(&buf[2], GFP_NOIO);
928 break;
929 case 0x84: /* device name */
930 if (!device_name)
931 device_name = kstrdup(&buf[2], GFP_NOIO);
932 break;
933 }
934 }
935
936 printk(KERN_INFO "Nexio device: %s, firmware version: %s\n",
937 device_name, firmware_ver);
938
939 kfree(firmware_ver);
940 kfree(device_name);
941
942 usb_fill_bulk_urb(priv->ack, dev, usb_sndbulkpipe(dev, output_ep),
943 priv->ack_buf, sizeof(nexio_ack_pkt),
944 nexio_ack_complete, usbtouch);
945 ret = 0;
946
947out_buf:
948 kfree(buf);
949 return ret;
950}
951
952static void nexio_exit(struct usbtouch_usb *usbtouch)
953{
954 struct nexio_priv *priv = usbtouch->priv;
955
956 usb_kill_urb(priv->ack);
957 usb_free_urb(priv->ack);
958 kfree(priv->ack_buf);
959 kfree(priv);
960}
961
962static int nexio_read_data(struct usbtouch_usb *usbtouch, unsigned char *pkt)
963{
964 struct nexio_touch_packet *packet = (void *) pkt;
965 struct nexio_priv *priv = usbtouch->priv;
966 unsigned int data_len = be16_to_cpu(packet->data_len);
967 unsigned int x_len = be16_to_cpu(packet->x_len);
968 unsigned int y_len = be16_to_cpu(packet->y_len);
969 int x, y, begin_x, begin_y, end_x, end_y, w, h, ret;
970
971 /* got touch data? */
972 if ((pkt[0] & 0xe0) != 0xe0)
973 return 0;
974
975 if (data_len > 0xff)
976 data_len -= 0x100;
977 if (x_len > 0xff)
978 x_len -= 0x80;
979
980 /* send ACK */
981 ret = usb_submit_urb(priv->ack, GFP_ATOMIC);
982
983 if (!usbtouch->type->max_xc) {
984 usbtouch->type->max_xc = 2 * x_len;
985 input_set_abs_params(usbtouch->input, ABS_X,
986 0, usbtouch->type->max_xc, 0, 0);
987 usbtouch->type->max_yc = 2 * y_len;
988 input_set_abs_params(usbtouch->input, ABS_Y,
989 0, usbtouch->type->max_yc, 0, 0);
990 }
991 /*
992 * The device reports state of IR sensors on X and Y axes.
993 * Each byte represents "darkness" percentage (0-100) of one element.
994 * 17" touchscreen reports only 64 x 52 bytes so the resolution is low.
995 * This also means that there's a limited multi-touch capability but
996 * it's disabled (and untested) here as there's no X driver for that.
997 */
998 begin_x = end_x = begin_y = end_y = -1;
999 for (x = 0; x < x_len; x++) {
1000 if (begin_x == -1 && packet->data[x] > NEXIO_THRESHOLD) {
1001 begin_x = x;
1002 continue;
1003 }
1004 if (end_x == -1 && begin_x != -1 && packet->data[x] < NEXIO_THRESHOLD) {
1005 end_x = x - 1;
1006 for (y = x_len; y < data_len; y++) {
1007 if (begin_y == -1 && packet->data[y] > NEXIO_THRESHOLD) {
1008 begin_y = y - x_len;
1009 continue;
1010 }
1011 if (end_y == -1 &&
1012 begin_y != -1 && packet->data[y] < NEXIO_THRESHOLD) {
1013 end_y = y - 1 - x_len;
1014 w = end_x - begin_x;
1015 h = end_y - begin_y;
1016#if 0
1017 /* multi-touch */
1018 input_report_abs(usbtouch->input,
1019 ABS_MT_TOUCH_MAJOR, max(w,h));
1020 input_report_abs(usbtouch->input,
1021 ABS_MT_TOUCH_MINOR, min(x,h));
1022 input_report_abs(usbtouch->input,
1023 ABS_MT_POSITION_X, 2*begin_x+w);
1024 input_report_abs(usbtouch->input,
1025 ABS_MT_POSITION_Y, 2*begin_y+h);
1026 input_report_abs(usbtouch->input,
1027 ABS_MT_ORIENTATION, w > h);
1028 input_mt_sync(usbtouch->input);
1029#endif
1030 /* single touch */
1031 usbtouch->x = 2 * begin_x + w;
1032 usbtouch->y = 2 * begin_y + h;
1033 usbtouch->touch = packet->flags & 0x01;
1034 begin_y = end_y = -1;
1035 return 1;
1036 }
1037 }
1038 begin_x = end_x = -1;
1039 }
1040
1041 }
1042 return 0;
1043}
1044#endif
1045
1046
1047/*****************************************************************************
1048 * ELO part
1049 */
1050
1051#ifdef CONFIG_TOUCHSCREEN_USB_ELO
1052
1053static int elo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
1054{
1055 dev->x = (pkt[3] << 8) | pkt[2];
1056 dev->y = (pkt[5] << 8) | pkt[4];
1057 dev->touch = pkt[6] > 0;
1058 dev->press = pkt[6];
1059
1060 return 1;
1061}
1062#endif
1063
1064
1065/*****************************************************************************
1066 * the different device descriptors
1067 */
1068#ifdef MULTI_PACKET
1069static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1070 unsigned char *pkt, int len);
1071#endif
1072
1073static struct usbtouch_device_info usbtouch_dev_info[] = {
1074#ifdef CONFIG_TOUCHSCREEN_USB_ELO
1075 [DEVTYPE_ELO] = {
1076 .min_xc = 0x0,
1077 .max_xc = 0x0fff,
1078 .min_yc = 0x0,
1079 .max_yc = 0x0fff,
1080 .max_press = 0xff,
1081 .rept_size = 8,
1082 .read_data = elo_read_data,
1083 },
1084#endif
1085
1086#ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
1087 [DEVTYPE_EGALAX] = {
1088 .min_xc = 0x0,
1089 .max_xc = 0x07ff,
1090 .min_yc = 0x0,
1091 .max_yc = 0x07ff,
1092 .rept_size = 16,
1093 .process_pkt = usbtouch_process_multi,
1094 .get_pkt_len = egalax_get_pkt_len,
1095 .read_data = egalax_read_data,
1096 .init = egalax_init,
1097 },
1098#endif
1099
1100#ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
1101 [DEVTYPE_PANJIT] = {
1102 .min_xc = 0x0,
1103 .max_xc = 0x0fff,
1104 .min_yc = 0x0,
1105 .max_yc = 0x0fff,
1106 .rept_size = 8,
1107 .read_data = panjit_read_data,
1108 },
1109#endif
1110
1111#ifdef CONFIG_TOUCHSCREEN_USB_3M
1112 [DEVTYPE_3M] = {
1113 .min_xc = 0x0,
1114 .max_xc = 0x4000,
1115 .min_yc = 0x0,
1116 .max_yc = 0x4000,
1117 .rept_size = 11,
1118 .read_data = mtouch_read_data,
1119 .init = mtouch_init,
1120 },
1121#endif
1122
1123#ifdef CONFIG_TOUCHSCREEN_USB_ITM
1124 [DEVTYPE_ITM] = {
1125 .min_xc = 0x0,
1126 .max_xc = 0x0fff,
1127 .min_yc = 0x0,
1128 .max_yc = 0x0fff,
1129 .max_press = 0xff,
1130 .rept_size = 8,
1131 .read_data = itm_read_data,
1132 },
1133#endif
1134
1135#ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
1136 [DEVTYPE_ETURBO] = {
1137 .min_xc = 0x0,
1138 .max_xc = 0x07ff,
1139 .min_yc = 0x0,
1140 .max_yc = 0x07ff,
1141 .rept_size = 8,
1142 .process_pkt = usbtouch_process_multi,
1143 .get_pkt_len = eturbo_get_pkt_len,
1144 .read_data = eturbo_read_data,
1145 },
1146#endif
1147
1148#ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
1149 [DEVTYPE_GUNZE] = {
1150 .min_xc = 0x0,
1151 .max_xc = 0x0fff,
1152 .min_yc = 0x0,
1153 .max_yc = 0x0fff,
1154 .rept_size = 4,
1155 .read_data = gunze_read_data,
1156 },
1157#endif
1158
1159#ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
1160 [DEVTYPE_DMC_TSC10] = {
1161 .min_xc = 0x0,
1162 .max_xc = 0x03ff,
1163 .min_yc = 0x0,
1164 .max_yc = 0x03ff,
1165 .rept_size = 5,
1166 .init = dmc_tsc10_init,
1167 .read_data = dmc_tsc10_read_data,
1168 },
1169#endif
1170
1171#ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
1172 [DEVTYPE_IRTOUCH] = {
1173 .min_xc = 0x0,
1174 .max_xc = 0x0fff,
1175 .min_yc = 0x0,
1176 .max_yc = 0x0fff,
1177 .rept_size = 8,
1178 .read_data = irtouch_read_data,
1179 },
1180#endif
1181
1182#ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
1183 [DEVTYPE_IDEALTEK] = {
1184 .min_xc = 0x0,
1185 .max_xc = 0x0fff,
1186 .min_yc = 0x0,
1187 .max_yc = 0x0fff,
1188 .rept_size = 8,
1189 .process_pkt = usbtouch_process_multi,
1190 .get_pkt_len = idealtek_get_pkt_len,
1191 .read_data = idealtek_read_data,
1192 },
1193#endif
1194
1195#ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
1196 [DEVTYPE_GENERAL_TOUCH] = {
1197 .min_xc = 0x0,
1198 .max_xc = 0x7fff,
1199 .min_yc = 0x0,
1200 .max_yc = 0x7fff,
1201 .rept_size = 7,
1202 .read_data = general_touch_read_data,
1203 },
1204#endif
1205
1206#ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
1207 [DEVTYPE_GOTOP] = {
1208 .min_xc = 0x0,
1209 .max_xc = 0x03ff,
1210 .min_yc = 0x0,
1211 .max_yc = 0x03ff,
1212 .rept_size = 4,
1213 .read_data = gotop_read_data,
1214 },
1215#endif
1216
1217#ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
1218 [DEVTYPE_JASTEC] = {
1219 .min_xc = 0x0,
1220 .max_xc = 0x0fff,
1221 .min_yc = 0x0,
1222 .max_yc = 0x0fff,
1223 .rept_size = 4,
1224 .read_data = jastec_read_data,
1225 },
1226#endif
1227
1228#ifdef CONFIG_TOUCHSCREEN_USB_E2I
1229 [DEVTYPE_E2I] = {
1230 .min_xc = 0x0,
1231 .max_xc = 0x7fff,
1232 .min_yc = 0x0,
1233 .max_yc = 0x7fff,
1234 .rept_size = 6,
1235 .init = e2i_init,
1236 .read_data = e2i_read_data,
1237 },
1238#endif
1239
1240#ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
1241 [DEVTYPE_ZYTRONIC] = {
1242 .min_xc = 0x0,
1243 .max_xc = 0x03ff,
1244 .min_yc = 0x0,
1245 .max_yc = 0x03ff,
1246 .rept_size = 5,
1247 .read_data = zytronic_read_data,
1248 .irq_always = true,
1249 },
1250#endif
1251
1252#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
1253 [DEVTYPE_TC45USB] = {
1254 .min_xc = 0x0,
1255 .max_xc = 0x0fff,
1256 .min_yc = 0x0,
1257 .max_yc = 0x0fff,
1258 .rept_size = 5,
1259 .read_data = tc45usb_read_data,
1260 },
1261#endif
1262
1263#ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
1264 [DEVTYPE_NEXIO] = {
1265 .rept_size = 1024,
1266 .irq_always = true,
1267 .read_data = nexio_read_data,
1268 .alloc = nexio_alloc,
1269 .init = nexio_init,
1270 .exit = nexio_exit,
1271 },
1272#endif
1273#ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
1274 [DEVTYPE_ETOUCH] = {
1275 .min_xc = 0x0,
1276 .max_xc = 0x07ff,
1277 .min_yc = 0x0,
1278 .max_yc = 0x07ff,
1279 .rept_size = 16,
1280 .process_pkt = usbtouch_process_multi,
1281 .get_pkt_len = etouch_get_pkt_len,
1282 .read_data = etouch_read_data,
1283 },
1284#endif
1285};
1286
1287
1288/*****************************************************************************
1289 * Generic Part
1290 */
1291static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
1292 unsigned char *pkt, int len)
1293{
1294 struct usbtouch_device_info *type = usbtouch->type;
1295
1296 if (!type->read_data(usbtouch, pkt))
1297 return;
1298
1299 input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch);
1300
1301 if (swap_xy) {
1302 input_report_abs(usbtouch->input, ABS_X, usbtouch->y);
1303 input_report_abs(usbtouch->input, ABS_Y, usbtouch->x);
1304 } else {
1305 input_report_abs(usbtouch->input, ABS_X, usbtouch->x);
1306 input_report_abs(usbtouch->input, ABS_Y, usbtouch->y);
1307 }
1308 if (type->max_press)
1309 input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press);
1310 input_sync(usbtouch->input);
1311}
1312
1313
1314#ifdef MULTI_PACKET
1315static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1316 unsigned char *pkt, int len)
1317{
1318 unsigned char *buffer;
1319 int pkt_len, pos, buf_len, tmp;
1320
1321 /* process buffer */
1322 if (unlikely(usbtouch->buf_len)) {
1323 /* try to get size */
1324 pkt_len = usbtouch->type->get_pkt_len(
1325 usbtouch->buffer, usbtouch->buf_len);
1326
1327 /* drop? */
1328 if (unlikely(!pkt_len))
1329 goto out_flush_buf;
1330
1331 /* need to append -pkt_len bytes before able to get size */
1332 if (unlikely(pkt_len < 0)) {
1333 int append = -pkt_len;
1334 if (unlikely(append > len))
1335 append = len;
1336 if (usbtouch->buf_len + append >= usbtouch->type->rept_size)
1337 goto out_flush_buf;
1338 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append);
1339 usbtouch->buf_len += append;
1340
1341 pkt_len = usbtouch->type->get_pkt_len(
1342 usbtouch->buffer, usbtouch->buf_len);
1343 if (pkt_len < 0)
1344 return;
1345 }
1346
1347 /* append */
1348 tmp = pkt_len - usbtouch->buf_len;
1349 if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size)
1350 goto out_flush_buf;
1351 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp);
1352 usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len);
1353
1354 buffer = pkt + tmp;
1355 buf_len = len - tmp;
1356 } else {
1357 buffer = pkt;
1358 buf_len = len;
1359 }
1360
1361 /* loop over the received packet, process */
1362 pos = 0;
1363 while (pos < buf_len) {
1364 /* get packet len */
1365 pkt_len = usbtouch->type->get_pkt_len(buffer + pos,
1366 buf_len - pos);
1367
1368 /* unknown packet: skip one byte */
1369 if (unlikely(!pkt_len)) {
1370 pos++;
1371 continue;
1372 }
1373
1374 /* full packet: process */
1375 if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) {
1376 usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len);
1377 } else {
1378 /* incomplete packet: save in buffer */
1379 memcpy(usbtouch->buffer, buffer + pos, buf_len - pos);
1380 usbtouch->buf_len = buf_len - pos;
1381 return;
1382 }
1383 pos += pkt_len;
1384 }
1385
1386out_flush_buf:
1387 usbtouch->buf_len = 0;
1388 return;
1389}
1390#endif
1391
1392
1393static void usbtouch_irq(struct urb *urb)
1394{
1395 struct usbtouch_usb *usbtouch = urb->context;
1396 struct device *dev = &usbtouch->interface->dev;
1397 int retval;
1398
1399 switch (urb->status) {
1400 case 0:
1401 /* success */
1402 break;
1403 case -ETIME:
1404 /* this urb is timing out */
1405 dev_dbg(dev,
1406 "%s - urb timed out - was the device unplugged?\n",
1407 __func__);
1408 return;
1409 case -ECONNRESET:
1410 case -ENOENT:
1411 case -ESHUTDOWN:
1412 case -EPIPE:
1413 /* this urb is terminated, clean up */
1414 dev_dbg(dev, "%s - urb shutting down with status: %d\n",
1415 __func__, urb->status);
1416 return;
1417 default:
1418 dev_dbg(dev, "%s - nonzero urb status received: %d\n",
1419 __func__, urb->status);
1420 goto exit;
1421 }
1422
1423 usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length);
1424
1425exit:
1426 usb_mark_last_busy(interface_to_usbdev(usbtouch->interface));
1427 retval = usb_submit_urb(urb, GFP_ATOMIC);
1428 if (retval)
1429 dev_err(dev, "%s - usb_submit_urb failed with result: %d\n",
1430 __func__, retval);
1431}
1432
1433static int usbtouch_open(struct input_dev *input)
1434{
1435 struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1436 int r;
1437
1438 usbtouch->irq->dev = interface_to_usbdev(usbtouch->interface);
1439
1440 r = usb_autopm_get_interface(usbtouch->interface) ? -EIO : 0;
1441 if (r < 0)
1442 goto out;
1443
1444 if (!usbtouch->type->irq_always) {
1445 if (usb_submit_urb(usbtouch->irq, GFP_KERNEL)) {
1446 r = -EIO;
1447 goto out_put;
1448 }
1449 }
1450
1451 usbtouch->interface->needs_remote_wakeup = 1;
1452out_put:
1453 usb_autopm_put_interface(usbtouch->interface);
1454out:
1455 return r;
1456}
1457
1458static void usbtouch_close(struct input_dev *input)
1459{
1460 struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1461 int r;
1462
1463 if (!usbtouch->type->irq_always)
1464 usb_kill_urb(usbtouch->irq);
1465 r = usb_autopm_get_interface(usbtouch->interface);
1466 usbtouch->interface->needs_remote_wakeup = 0;
1467 if (!r)
1468 usb_autopm_put_interface(usbtouch->interface);
1469}
1470
1471static int usbtouch_suspend
1472(struct usb_interface *intf, pm_message_t message)
1473{
1474 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1475
1476 usb_kill_urb(usbtouch->irq);
1477
1478 return 0;
1479}
1480
1481static int usbtouch_resume(struct usb_interface *intf)
1482{
1483 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1484 struct input_dev *input = usbtouch->input;
1485 int result = 0;
1486
1487 mutex_lock(&input->mutex);
1488 if (input->users || usbtouch->type->irq_always)
1489 result = usb_submit_urb(usbtouch->irq, GFP_NOIO);
1490 mutex_unlock(&input->mutex);
1491
1492 return result;
1493}
1494
1495static int usbtouch_reset_resume(struct usb_interface *intf)
1496{
1497 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1498 struct input_dev *input = usbtouch->input;
1499 int err = 0;
1500
1501 /* reinit the device */
1502 if (usbtouch->type->init) {
1503 err = usbtouch->type->init(usbtouch);
1504 if (err) {
1505 dev_dbg(&intf->dev,
1506 "%s - type->init() failed, err: %d\n",
1507 __func__, err);
1508 return err;
1509 }
1510 }
1511
1512 /* restart IO if needed */
1513 mutex_lock(&input->mutex);
1514 if (input->users)
1515 err = usb_submit_urb(usbtouch->irq, GFP_NOIO);
1516 mutex_unlock(&input->mutex);
1517
1518 return err;
1519}
1520
1521static void usbtouch_free_buffers(struct usb_device *udev,
1522 struct usbtouch_usb *usbtouch)
1523{
1524 usb_free_coherent(udev, usbtouch->data_size,
1525 usbtouch->data, usbtouch->data_dma);
1526 kfree(usbtouch->buffer);
1527}
1528
1529static struct usb_endpoint_descriptor *
1530usbtouch_get_input_endpoint(struct usb_host_interface *interface)
1531{
1532 int i;
1533
1534 for (i = 0; i < interface->desc.bNumEndpoints; i++)
1535 if (usb_endpoint_dir_in(&interface->endpoint[i].desc))
1536 return &interface->endpoint[i].desc;
1537
1538 return NULL;
1539}
1540
1541static int usbtouch_probe(struct usb_interface *intf,
1542 const struct usb_device_id *id)
1543{
1544 struct usbtouch_usb *usbtouch;
1545 struct input_dev *input_dev;
1546 struct usb_endpoint_descriptor *endpoint;
1547 struct usb_device *udev = interface_to_usbdev(intf);
1548 struct usbtouch_device_info *type;
1549 int err = -ENOMEM;
1550
1551 /* some devices are ignored */
1552 if (id->driver_info == DEVTYPE_IGNORE)
1553 return -ENODEV;
1554
1555 endpoint = usbtouch_get_input_endpoint(intf->cur_altsetting);
1556 if (!endpoint)
1557 return -ENXIO;
1558
1559 usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL);
1560 input_dev = input_allocate_device();
1561 if (!usbtouch || !input_dev)
1562 goto out_free;
1563
1564 type = &usbtouch_dev_info[id->driver_info];
1565 usbtouch->type = type;
1566 if (!type->process_pkt)
1567 type->process_pkt = usbtouch_process_pkt;
1568
1569 usbtouch->data_size = type->rept_size;
1570 if (type->get_pkt_len) {
1571 /*
1572 * When dealing with variable-length packets we should
1573 * not request more than wMaxPacketSize bytes at once
1574 * as we do not know if there is more data coming or
1575 * we filled exactly wMaxPacketSize bytes and there is
1576 * nothing else.
1577 */
1578 usbtouch->data_size = min(usbtouch->data_size,
1579 usb_endpoint_maxp(endpoint));
1580 }
1581
1582 usbtouch->data = usb_alloc_coherent(udev, usbtouch->data_size,
1583 GFP_KERNEL, &usbtouch->data_dma);
1584 if (!usbtouch->data)
1585 goto out_free;
1586
1587 if (type->get_pkt_len) {
1588 usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL);
1589 if (!usbtouch->buffer)
1590 goto out_free_buffers;
1591 }
1592
1593 usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
1594 if (!usbtouch->irq) {
1595 dev_dbg(&intf->dev,
1596 "%s - usb_alloc_urb failed: usbtouch->irq\n", __func__);
1597 goto out_free_buffers;
1598 }
1599
1600 usbtouch->interface = intf;
1601 usbtouch->input = input_dev;
1602
1603 if (udev->manufacturer)
1604 strlcpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name));
1605
1606 if (udev->product) {
1607 if (udev->manufacturer)
1608 strlcat(usbtouch->name, " ", sizeof(usbtouch->name));
1609 strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name));
1610 }
1611
1612 if (!strlen(usbtouch->name))
1613 snprintf(usbtouch->name, sizeof(usbtouch->name),
1614 "USB Touchscreen %04x:%04x",
1615 le16_to_cpu(udev->descriptor.idVendor),
1616 le16_to_cpu(udev->descriptor.idProduct));
1617
1618 usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys));
1619 strlcat(usbtouch->phys, "/input0", sizeof(usbtouch->phys));
1620
1621 input_dev->name = usbtouch->name;
1622 input_dev->phys = usbtouch->phys;
1623 usb_to_input_id(udev, &input_dev->id);
1624 input_dev->dev.parent = &intf->dev;
1625
1626 input_set_drvdata(input_dev, usbtouch);
1627
1628 input_dev->open = usbtouch_open;
1629 input_dev->close = usbtouch_close;
1630
1631 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
1632 input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
1633 input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0);
1634 input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0);
1635 if (type->max_press)
1636 input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press,
1637 type->max_press, 0, 0);
1638
1639 if (usb_endpoint_type(endpoint) == USB_ENDPOINT_XFER_INT)
1640 usb_fill_int_urb(usbtouch->irq, udev,
1641 usb_rcvintpipe(udev, endpoint->bEndpointAddress),
1642 usbtouch->data, usbtouch->data_size,
1643 usbtouch_irq, usbtouch, endpoint->bInterval);
1644 else
1645 usb_fill_bulk_urb(usbtouch->irq, udev,
1646 usb_rcvbulkpipe(udev, endpoint->bEndpointAddress),
1647 usbtouch->data, usbtouch->data_size,
1648 usbtouch_irq, usbtouch);
1649
1650 usbtouch->irq->dev = udev;
1651 usbtouch->irq->transfer_dma = usbtouch->data_dma;
1652 usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1653
1654 /* device specific allocations */
1655 if (type->alloc) {
1656 err = type->alloc(usbtouch);
1657 if (err) {
1658 dev_dbg(&intf->dev,
1659 "%s - type->alloc() failed, err: %d\n",
1660 __func__, err);
1661 goto out_free_urb;
1662 }
1663 }
1664
1665 /* device specific initialisation*/
1666 if (type->init) {
1667 err = type->init(usbtouch);
1668 if (err) {
1669 dev_dbg(&intf->dev,
1670 "%s - type->init() failed, err: %d\n",
1671 __func__, err);
1672 goto out_do_exit;
1673 }
1674 }
1675
1676 err = input_register_device(usbtouch->input);
1677 if (err) {
1678 dev_dbg(&intf->dev,
1679 "%s - input_register_device failed, err: %d\n",
1680 __func__, err);
1681 goto out_do_exit;
1682 }
1683
1684 usb_set_intfdata(intf, usbtouch);
1685
1686 if (usbtouch->type->irq_always) {
1687 /* this can't fail */
1688 usb_autopm_get_interface(intf);
1689 err = usb_submit_urb(usbtouch->irq, GFP_KERNEL);
1690 if (err) {
1691 usb_autopm_put_interface(intf);
1692 dev_err(&intf->dev,
1693 "%s - usb_submit_urb failed with result: %d\n",
1694 __func__, err);
1695 goto out_unregister_input;
1696 }
1697 }
1698
1699 return 0;
1700
1701out_unregister_input:
1702 input_unregister_device(input_dev);
1703 input_dev = NULL;
1704out_do_exit:
1705 if (type->exit)
1706 type->exit(usbtouch);
1707out_free_urb:
1708 usb_free_urb(usbtouch->irq);
1709out_free_buffers:
1710 usbtouch_free_buffers(udev, usbtouch);
1711out_free:
1712 input_free_device(input_dev);
1713 kfree(usbtouch);
1714 return err;
1715}
1716
1717static void usbtouch_disconnect(struct usb_interface *intf)
1718{
1719 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1720
1721 if (!usbtouch)
1722 return;
1723
1724 dev_dbg(&intf->dev,
1725 "%s - usbtouch is initialized, cleaning up\n", __func__);
1726
1727 usb_set_intfdata(intf, NULL);
1728 /* this will stop IO via close */
1729 input_unregister_device(usbtouch->input);
1730 usb_free_urb(usbtouch->irq);
1731 if (usbtouch->type->exit)
1732 usbtouch->type->exit(usbtouch);
1733 usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch);
1734 kfree(usbtouch);
1735}
1736
1737MODULE_DEVICE_TABLE(usb, usbtouch_devices);
1738
1739static struct usb_driver usbtouch_driver = {
1740 .name = "usbtouchscreen",
1741 .probe = usbtouch_probe,
1742 .disconnect = usbtouch_disconnect,
1743 .suspend = usbtouch_suspend,
1744 .resume = usbtouch_resume,
1745 .reset_resume = usbtouch_reset_resume,
1746 .id_table = usbtouch_devices,
1747 .supports_autosuspend = 1,
1748};
1749
1750module_usb_driver(usbtouch_driver);
1751
1752MODULE_AUTHOR(DRIVER_AUTHOR);
1753MODULE_DESCRIPTION(DRIVER_DESC);
1754MODULE_LICENSE("GPL");
1755
1756MODULE_ALIAS("touchkitusb");
1757MODULE_ALIAS("itmtouch");
1758MODULE_ALIAS("mtouchusb");
1/******************************************************************************
2 * usbtouchscreen.c
3 * Driver for USB Touchscreens, supporting those devices:
4 * - eGalax Touchkit
5 * includes eTurboTouch CT-410/510/700
6 * - 3M/Microtouch EX II series
7 * - ITM
8 * - PanJit TouchSet
9 * - eTurboTouch
10 * - Gunze AHL61
11 * - DMC TSC-10/25
12 * - IRTOUCHSYSTEMS/UNITOP
13 * - IdealTEK URTC1000
14 * - General Touch
15 * - GoTop Super_Q2/GogoPen/PenPower tablets
16 * - JASTEC USB touch controller/DigiTech DTR-02U
17 * - Zytronic capacitive touchscreen
18 * - NEXIO/iNexio
19 * - Elo TouchSystems 2700 IntelliTouch
20 * - EasyTouch USB Dual/Multi touch controller from Data Modul
21 *
22 * Copyright (C) 2004-2007 by Daniel Ritz <daniel.ritz@gmx.ch>
23 * Copyright (C) by Todd E. Johnson (mtouchusb.c)
24 *
25 * This program is free software; you can redistribute it and/or
26 * modify it under the terms of the GNU General Public License as
27 * published by the Free Software Foundation; either version 2 of the
28 * License, or (at your option) any later version.
29 *
30 * This program is distributed in the hope that it will be useful, but
31 * WITHOUT ANY WARRANTY; without even the implied warranty of
32 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
33 * General Public License for more details.
34 *
35 * You should have received a copy of the GNU General Public License
36 * along with this program; if not, write to the Free Software
37 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
38 *
39 * Driver is based on touchkitusb.c
40 * - ITM parts are from itmtouch.c
41 * - 3M parts are from mtouchusb.c
42 * - PanJit parts are from an unmerged driver by Lanslott Gish
43 * - DMC TSC 10/25 are from Holger Schurig, with ideas from an unmerged
44 * driver from Marius Vollmer
45 *
46 *****************************************************************************/
47
48//#define DEBUG
49
50#include <linux/kernel.h>
51#include <linux/slab.h>
52#include <linux/input.h>
53#include <linux/module.h>
54#include <linux/usb.h>
55#include <linux/usb/input.h>
56#include <linux/hid.h>
57
58
59#define DRIVER_VERSION "v0.6"
60#define DRIVER_AUTHOR "Daniel Ritz <daniel.ritz@gmx.ch>"
61#define DRIVER_DESC "USB Touchscreen Driver"
62
63static bool swap_xy;
64module_param(swap_xy, bool, 0644);
65MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");
66
67static bool hwcalib_xy;
68module_param(hwcalib_xy, bool, 0644);
69MODULE_PARM_DESC(hwcalib_xy, "If set hw-calibrated X/Y are used if available");
70
71/* device specifc data/functions */
72struct usbtouch_usb;
73struct usbtouch_device_info {
74 int min_xc, max_xc;
75 int min_yc, max_yc;
76 int min_press, max_press;
77 int rept_size;
78
79 /*
80 * Always service the USB devices irq not just when the input device is
81 * open. This is useful when devices have a watchdog which prevents us
82 * from periodically polling the device. Leave this unset unless your
83 * touchscreen device requires it, as it does consume more of the USB
84 * bandwidth.
85 */
86 bool irq_always;
87
88 void (*process_pkt) (struct usbtouch_usb *usbtouch, unsigned char *pkt, int len);
89
90 /*
91 * used to get the packet len. possible return values:
92 * > 0: packet len
93 * = 0: skip one byte
94 * < 0: -return value more bytes needed
95 */
96 int (*get_pkt_len) (unsigned char *pkt, int len);
97
98 int (*read_data) (struct usbtouch_usb *usbtouch, unsigned char *pkt);
99 int (*alloc) (struct usbtouch_usb *usbtouch);
100 int (*init) (struct usbtouch_usb *usbtouch);
101 void (*exit) (struct usbtouch_usb *usbtouch);
102};
103
104/* a usbtouch device */
105struct usbtouch_usb {
106 unsigned char *data;
107 dma_addr_t data_dma;
108 int data_size;
109 unsigned char *buffer;
110 int buf_len;
111 struct urb *irq;
112 struct usb_interface *interface;
113 struct input_dev *input;
114 struct usbtouch_device_info *type;
115 char name[128];
116 char phys[64];
117 void *priv;
118
119 int x, y;
120 int touch, press;
121};
122
123
124/* device types */
125enum {
126 DEVTYPE_IGNORE = -1,
127 DEVTYPE_EGALAX,
128 DEVTYPE_PANJIT,
129 DEVTYPE_3M,
130 DEVTYPE_ITM,
131 DEVTYPE_ETURBO,
132 DEVTYPE_GUNZE,
133 DEVTYPE_DMC_TSC10,
134 DEVTYPE_IRTOUCH,
135 DEVTYPE_IRTOUCH_HIRES,
136 DEVTYPE_IDEALTEK,
137 DEVTYPE_GENERAL_TOUCH,
138 DEVTYPE_GOTOP,
139 DEVTYPE_JASTEC,
140 DEVTYPE_E2I,
141 DEVTYPE_ZYTRONIC,
142 DEVTYPE_TC45USB,
143 DEVTYPE_NEXIO,
144 DEVTYPE_ELO,
145 DEVTYPE_ETOUCH,
146};
147
148#define USB_DEVICE_HID_CLASS(vend, prod) \
149 .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS \
150 | USB_DEVICE_ID_MATCH_DEVICE, \
151 .idVendor = (vend), \
152 .idProduct = (prod), \
153 .bInterfaceClass = USB_INTERFACE_CLASS_HID
154
155static const struct usb_device_id usbtouch_devices[] = {
156#ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
157 /* ignore the HID capable devices, handled by usbhid */
158 {USB_DEVICE_HID_CLASS(0x0eef, 0x0001), .driver_info = DEVTYPE_IGNORE},
159 {USB_DEVICE_HID_CLASS(0x0eef, 0x0002), .driver_info = DEVTYPE_IGNORE},
160
161 /* normal device IDs */
162 {USB_DEVICE(0x3823, 0x0001), .driver_info = DEVTYPE_EGALAX},
163 {USB_DEVICE(0x3823, 0x0002), .driver_info = DEVTYPE_EGALAX},
164 {USB_DEVICE(0x0123, 0x0001), .driver_info = DEVTYPE_EGALAX},
165 {USB_DEVICE(0x0eef, 0x0001), .driver_info = DEVTYPE_EGALAX},
166 {USB_DEVICE(0x0eef, 0x0002), .driver_info = DEVTYPE_EGALAX},
167 {USB_DEVICE(0x1234, 0x0001), .driver_info = DEVTYPE_EGALAX},
168 {USB_DEVICE(0x1234, 0x0002), .driver_info = DEVTYPE_EGALAX},
169#endif
170
171#ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
172 {USB_DEVICE(0x134c, 0x0001), .driver_info = DEVTYPE_PANJIT},
173 {USB_DEVICE(0x134c, 0x0002), .driver_info = DEVTYPE_PANJIT},
174 {USB_DEVICE(0x134c, 0x0003), .driver_info = DEVTYPE_PANJIT},
175 {USB_DEVICE(0x134c, 0x0004), .driver_info = DEVTYPE_PANJIT},
176#endif
177
178#ifdef CONFIG_TOUCHSCREEN_USB_3M
179 {USB_DEVICE(0x0596, 0x0001), .driver_info = DEVTYPE_3M},
180#endif
181
182#ifdef CONFIG_TOUCHSCREEN_USB_ITM
183 {USB_DEVICE(0x0403, 0xf9e9), .driver_info = DEVTYPE_ITM},
184 {USB_DEVICE(0x16e3, 0xf9e9), .driver_info = DEVTYPE_ITM},
185#endif
186
187#ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
188 {USB_DEVICE(0x1234, 0x5678), .driver_info = DEVTYPE_ETURBO},
189#endif
190
191#ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
192 {USB_DEVICE(0x0637, 0x0001), .driver_info = DEVTYPE_GUNZE},
193#endif
194
195#ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
196 {USB_DEVICE(0x0afa, 0x03e8), .driver_info = DEVTYPE_DMC_TSC10},
197#endif
198
199#ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
200 {USB_DEVICE(0x595a, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
201 {USB_DEVICE(0x6615, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
202 {USB_DEVICE(0x6615, 0x0012), .driver_info = DEVTYPE_IRTOUCH_HIRES},
203#endif
204
205#ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
206 {USB_DEVICE(0x1391, 0x1000), .driver_info = DEVTYPE_IDEALTEK},
207#endif
208
209#ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
210 {USB_DEVICE(0x0dfc, 0x0001), .driver_info = DEVTYPE_GENERAL_TOUCH},
211#endif
212
213#ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
214 {USB_DEVICE(0x08f2, 0x007f), .driver_info = DEVTYPE_GOTOP},
215 {USB_DEVICE(0x08f2, 0x00ce), .driver_info = DEVTYPE_GOTOP},
216 {USB_DEVICE(0x08f2, 0x00f4), .driver_info = DEVTYPE_GOTOP},
217#endif
218
219#ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
220 {USB_DEVICE(0x0f92, 0x0001), .driver_info = DEVTYPE_JASTEC},
221#endif
222
223#ifdef CONFIG_TOUCHSCREEN_USB_E2I
224 {USB_DEVICE(0x1ac7, 0x0001), .driver_info = DEVTYPE_E2I},
225#endif
226
227#ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
228 {USB_DEVICE(0x14c8, 0x0003), .driver_info = DEVTYPE_ZYTRONIC},
229#endif
230
231#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
232 /* TC5UH */
233 {USB_DEVICE(0x0664, 0x0309), .driver_info = DEVTYPE_TC45USB},
234 /* TC4UM */
235 {USB_DEVICE(0x0664, 0x0306), .driver_info = DEVTYPE_TC45USB},
236#endif
237
238#ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
239 /* data interface only */
240 {USB_DEVICE_AND_INTERFACE_INFO(0x10f0, 0x2002, 0x0a, 0x00, 0x00),
241 .driver_info = DEVTYPE_NEXIO},
242 {USB_DEVICE_AND_INTERFACE_INFO(0x1870, 0x0001, 0x0a, 0x00, 0x00),
243 .driver_info = DEVTYPE_NEXIO},
244#endif
245
246#ifdef CONFIG_TOUCHSCREEN_USB_ELO
247 {USB_DEVICE(0x04e7, 0x0020), .driver_info = DEVTYPE_ELO},
248#endif
249
250#ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
251 {USB_DEVICE(0x7374, 0x0001), .driver_info = DEVTYPE_ETOUCH},
252#endif
253
254 {}
255};
256
257
258/*****************************************************************************
259 * e2i Part
260 */
261
262#ifdef CONFIG_TOUCHSCREEN_USB_E2I
263static int e2i_init(struct usbtouch_usb *usbtouch)
264{
265 int ret;
266 struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
267
268 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
269 0x01, 0x02, 0x0000, 0x0081,
270 NULL, 0, USB_CTRL_SET_TIMEOUT);
271
272 dev_dbg(&usbtouch->interface->dev,
273 "%s - usb_control_msg - E2I_RESET - bytes|err: %d\n",
274 __func__, ret);
275 return ret;
276}
277
278static int e2i_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
279{
280 int tmp = (pkt[0] << 8) | pkt[1];
281 dev->x = (pkt[2] << 8) | pkt[3];
282 dev->y = (pkt[4] << 8) | pkt[5];
283
284 tmp = tmp - 0xA000;
285 dev->touch = (tmp > 0);
286 dev->press = (tmp > 0 ? tmp : 0);
287
288 return 1;
289}
290#endif
291
292
293/*****************************************************************************
294 * eGalax part
295 */
296
297#ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
298
299#ifndef MULTI_PACKET
300#define MULTI_PACKET
301#endif
302
303#define EGALAX_PKT_TYPE_MASK 0xFE
304#define EGALAX_PKT_TYPE_REPT 0x80
305#define EGALAX_PKT_TYPE_DIAG 0x0A
306
307static int egalax_init(struct usbtouch_usb *usbtouch)
308{
309 int ret, i;
310 unsigned char *buf;
311 struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
312
313 /*
314 * An eGalax diagnostic packet kicks the device into using the right
315 * protocol. We send a "check active" packet. The response will be
316 * read later and ignored.
317 */
318
319 buf = kmalloc(3, GFP_KERNEL);
320 if (!buf)
321 return -ENOMEM;
322
323 buf[0] = EGALAX_PKT_TYPE_DIAG;
324 buf[1] = 1; /* length */
325 buf[2] = 'A'; /* command - check active */
326
327 for (i = 0; i < 3; i++) {
328 ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
329 0,
330 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
331 0, 0, buf, 3,
332 USB_CTRL_SET_TIMEOUT);
333 if (ret >= 0) {
334 ret = 0;
335 break;
336 }
337 if (ret != -EPIPE)
338 break;
339 }
340
341 kfree(buf);
342
343 return ret;
344}
345
346static int egalax_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
347{
348 if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT)
349 return 0;
350
351 dev->x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F);
352 dev->y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F);
353 dev->touch = pkt[0] & 0x01;
354
355 return 1;
356}
357
358static int egalax_get_pkt_len(unsigned char *buf, int len)
359{
360 switch (buf[0] & EGALAX_PKT_TYPE_MASK) {
361 case EGALAX_PKT_TYPE_REPT:
362 return 5;
363
364 case EGALAX_PKT_TYPE_DIAG:
365 if (len < 2)
366 return -1;
367
368 return buf[1] + 2;
369 }
370
371 return 0;
372}
373#endif
374
375/*****************************************************************************
376 * EasyTouch part
377 */
378
379#ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
380
381#ifndef MULTI_PACKET
382#define MULTI_PACKET
383#endif
384
385#define ETOUCH_PKT_TYPE_MASK 0xFE
386#define ETOUCH_PKT_TYPE_REPT 0x80
387#define ETOUCH_PKT_TYPE_REPT2 0xB0
388#define ETOUCH_PKT_TYPE_DIAG 0x0A
389
390static int etouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
391{
392 if ((pkt[0] & ETOUCH_PKT_TYPE_MASK) != ETOUCH_PKT_TYPE_REPT &&
393 (pkt[0] & ETOUCH_PKT_TYPE_MASK) != ETOUCH_PKT_TYPE_REPT2)
394 return 0;
395
396 dev->x = ((pkt[1] & 0x1F) << 7) | (pkt[2] & 0x7F);
397 dev->y = ((pkt[3] & 0x1F) << 7) | (pkt[4] & 0x7F);
398 dev->touch = pkt[0] & 0x01;
399
400 return 1;
401}
402
403static int etouch_get_pkt_len(unsigned char *buf, int len)
404{
405 switch (buf[0] & ETOUCH_PKT_TYPE_MASK) {
406 case ETOUCH_PKT_TYPE_REPT:
407 case ETOUCH_PKT_TYPE_REPT2:
408 return 5;
409
410 case ETOUCH_PKT_TYPE_DIAG:
411 if (len < 2)
412 return -1;
413
414 return buf[1] + 2;
415 }
416
417 return 0;
418}
419#endif
420
421/*****************************************************************************
422 * PanJit Part
423 */
424#ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
425static int panjit_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
426{
427 dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
428 dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
429 dev->touch = pkt[0] & 0x01;
430
431 return 1;
432}
433#endif
434
435
436/*****************************************************************************
437 * 3M/Microtouch Part
438 */
439#ifdef CONFIG_TOUCHSCREEN_USB_3M
440
441#define MTOUCHUSB_ASYNC_REPORT 1
442#define MTOUCHUSB_RESET 7
443#define MTOUCHUSB_REQ_CTRLLR_ID 10
444
445static int mtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
446{
447 if (hwcalib_xy) {
448 dev->x = (pkt[4] << 8) | pkt[3];
449 dev->y = 0xffff - ((pkt[6] << 8) | pkt[5]);
450 } else {
451 dev->x = (pkt[8] << 8) | pkt[7];
452 dev->y = (pkt[10] << 8) | pkt[9];
453 }
454 dev->touch = (pkt[2] & 0x40) ? 1 : 0;
455
456 return 1;
457}
458
459static int mtouch_init(struct usbtouch_usb *usbtouch)
460{
461 int ret, i;
462 struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
463
464 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
465 MTOUCHUSB_RESET,
466 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
467 1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
468 dev_dbg(&usbtouch->interface->dev,
469 "%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d\n",
470 __func__, ret);
471 if (ret < 0)
472 return ret;
473 msleep(150);
474
475 for (i = 0; i < 3; i++) {
476 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
477 MTOUCHUSB_ASYNC_REPORT,
478 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
479 1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT);
480 dev_dbg(&usbtouch->interface->dev,
481 "%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d\n",
482 __func__, ret);
483 if (ret >= 0)
484 break;
485 if (ret != -EPIPE)
486 return ret;
487 }
488
489 /* Default min/max xy are the raw values, override if using hw-calib */
490 if (hwcalib_xy) {
491 input_set_abs_params(usbtouch->input, ABS_X, 0, 0xffff, 0, 0);
492 input_set_abs_params(usbtouch->input, ABS_Y, 0, 0xffff, 0, 0);
493 }
494
495 return 0;
496}
497#endif
498
499
500/*****************************************************************************
501 * ITM Part
502 */
503#ifdef CONFIG_TOUCHSCREEN_USB_ITM
504static int itm_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
505{
506 int touch;
507 /*
508 * ITM devices report invalid x/y data if not touched.
509 * if the screen was touched before but is not touched any more
510 * report touch as 0 with the last valid x/y data once. then stop
511 * reporting data until touched again.
512 */
513 dev->press = ((pkt[2] & 0x01) << 7) | (pkt[5] & 0x7F);
514
515 touch = ~pkt[7] & 0x20;
516 if (!touch) {
517 if (dev->touch) {
518 dev->touch = 0;
519 return 1;
520 }
521
522 return 0;
523 }
524
525 dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F);
526 dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F);
527 dev->touch = touch;
528
529 return 1;
530}
531#endif
532
533
534/*****************************************************************************
535 * eTurboTouch part
536 */
537#ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
538#ifndef MULTI_PACKET
539#define MULTI_PACKET
540#endif
541static int eturbo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
542{
543 unsigned int shift;
544
545 /* packets should start with sync */
546 if (!(pkt[0] & 0x80))
547 return 0;
548
549 shift = (6 - (pkt[0] & 0x03));
550 dev->x = ((pkt[3] << 7) | pkt[4]) >> shift;
551 dev->y = ((pkt[1] << 7) | pkt[2]) >> shift;
552 dev->touch = (pkt[0] & 0x10) ? 1 : 0;
553
554 return 1;
555}
556
557static int eturbo_get_pkt_len(unsigned char *buf, int len)
558{
559 if (buf[0] & 0x80)
560 return 5;
561 if (buf[0] == 0x01)
562 return 3;
563 return 0;
564}
565#endif
566
567
568/*****************************************************************************
569 * Gunze part
570 */
571#ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
572static int gunze_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
573{
574 if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80))
575 return 0;
576
577 dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F);
578 dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F);
579 dev->touch = pkt[0] & 0x20;
580
581 return 1;
582}
583#endif
584
585/*****************************************************************************
586 * DMC TSC-10/25 Part
587 *
588 * Documentation about the controller and it's protocol can be found at
589 * http://www.dmccoltd.com/files/controler/tsc10usb_pi_e.pdf
590 * http://www.dmccoltd.com/files/controler/tsc25_usb_e.pdf
591 */
592#ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
593
594/* supported data rates. currently using 130 */
595#define TSC10_RATE_POINT 0x50
596#define TSC10_RATE_30 0x40
597#define TSC10_RATE_50 0x41
598#define TSC10_RATE_80 0x42
599#define TSC10_RATE_100 0x43
600#define TSC10_RATE_130 0x44
601#define TSC10_RATE_150 0x45
602
603/* commands */
604#define TSC10_CMD_RESET 0x55
605#define TSC10_CMD_RATE 0x05
606#define TSC10_CMD_DATA1 0x01
607
608static int dmc_tsc10_init(struct usbtouch_usb *usbtouch)
609{
610 struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
611 int ret = -ENOMEM;
612 unsigned char *buf;
613
614 buf = kmalloc(2, GFP_NOIO);
615 if (!buf)
616 goto err_nobuf;
617 /* reset */
618 buf[0] = buf[1] = 0xFF;
619 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
620 TSC10_CMD_RESET,
621 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
622 0, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
623 if (ret < 0)
624 goto err_out;
625 if (buf[0] != 0x06) {
626 ret = -ENODEV;
627 goto err_out;
628 }
629
630 /* TSC-25 data sheet specifies a delay after the RESET command */
631 msleep(150);
632
633 /* set coordinate output rate */
634 buf[0] = buf[1] = 0xFF;
635 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
636 TSC10_CMD_RATE,
637 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
638 TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
639 if (ret < 0)
640 goto err_out;
641 if ((buf[0] != 0x06) && (buf[0] != 0x15 || buf[1] != 0x01)) {
642 ret = -ENODEV;
643 goto err_out;
644 }
645
646 /* start sending data */
647 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
648 TSC10_CMD_DATA1,
649 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
650 0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
651err_out:
652 kfree(buf);
653err_nobuf:
654 return ret;
655}
656
657
658static int dmc_tsc10_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
659{
660 dev->x = ((pkt[2] & 0x03) << 8) | pkt[1];
661 dev->y = ((pkt[4] & 0x03) << 8) | pkt[3];
662 dev->touch = pkt[0] & 0x01;
663
664 return 1;
665}
666#endif
667
668
669/*****************************************************************************
670 * IRTOUCH Part
671 */
672#ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
673static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
674{
675 dev->x = (pkt[3] << 8) | pkt[2];
676 dev->y = (pkt[5] << 8) | pkt[4];
677 dev->touch = (pkt[1] & 0x03) ? 1 : 0;
678
679 return 1;
680}
681#endif
682
683/*****************************************************************************
684 * ET&T TC5UH/TC4UM part
685 */
686#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
687static int tc45usb_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
688{
689 dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
690 dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
691 dev->touch = pkt[0] & 0x01;
692
693 return 1;
694}
695#endif
696
697/*****************************************************************************
698 * IdealTEK URTC1000 Part
699 */
700#ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
701#ifndef MULTI_PACKET
702#define MULTI_PACKET
703#endif
704static int idealtek_get_pkt_len(unsigned char *buf, int len)
705{
706 if (buf[0] & 0x80)
707 return 5;
708 if (buf[0] == 0x01)
709 return len;
710 return 0;
711}
712
713static int idealtek_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
714{
715 switch (pkt[0] & 0x98) {
716 case 0x88:
717 /* touch data in IdealTEK mode */
718 dev->x = (pkt[1] << 5) | (pkt[2] >> 2);
719 dev->y = (pkt[3] << 5) | (pkt[4] >> 2);
720 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
721 return 1;
722
723 case 0x98:
724 /* touch data in MT emulation mode */
725 dev->x = (pkt[2] << 5) | (pkt[1] >> 2);
726 dev->y = (pkt[4] << 5) | (pkt[3] >> 2);
727 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
728 return 1;
729
730 default:
731 return 0;
732 }
733}
734#endif
735
736/*****************************************************************************
737 * General Touch Part
738 */
739#ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
740static int general_touch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
741{
742 dev->x = (pkt[2] << 8) | pkt[1];
743 dev->y = (pkt[4] << 8) | pkt[3];
744 dev->press = pkt[5] & 0xff;
745 dev->touch = pkt[0] & 0x01;
746
747 return 1;
748}
749#endif
750
751/*****************************************************************************
752 * GoTop Part
753 */
754#ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
755static int gotop_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
756{
757 dev->x = ((pkt[1] & 0x38) << 4) | pkt[2];
758 dev->y = ((pkt[1] & 0x07) << 7) | pkt[3];
759 dev->touch = pkt[0] & 0x01;
760
761 return 1;
762}
763#endif
764
765/*****************************************************************************
766 * JASTEC Part
767 */
768#ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
769static int jastec_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
770{
771 dev->x = ((pkt[0] & 0x3f) << 6) | (pkt[2] & 0x3f);
772 dev->y = ((pkt[1] & 0x3f) << 6) | (pkt[3] & 0x3f);
773 dev->touch = (pkt[0] & 0x40) >> 6;
774
775 return 1;
776}
777#endif
778
779/*****************************************************************************
780 * Zytronic Part
781 */
782#ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
783static int zytronic_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
784{
785 struct usb_interface *intf = dev->interface;
786
787 switch (pkt[0]) {
788 case 0x3A: /* command response */
789 dev_dbg(&intf->dev, "%s: Command response %d\n", __func__, pkt[1]);
790 break;
791
792 case 0xC0: /* down */
793 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
794 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
795 dev->touch = 1;
796 dev_dbg(&intf->dev, "%s: down %d,%d\n", __func__, dev->x, dev->y);
797 return 1;
798
799 case 0x80: /* up */
800 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
801 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
802 dev->touch = 0;
803 dev_dbg(&intf->dev, "%s: up %d,%d\n", __func__, dev->x, dev->y);
804 return 1;
805
806 default:
807 dev_dbg(&intf->dev, "%s: Unknown return %d\n", __func__, pkt[0]);
808 break;
809 }
810
811 return 0;
812}
813#endif
814
815/*****************************************************************************
816 * NEXIO Part
817 */
818#ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
819
820#define NEXIO_TIMEOUT 5000
821#define NEXIO_BUFSIZE 1024
822#define NEXIO_THRESHOLD 50
823
824struct nexio_priv {
825 struct urb *ack;
826 unsigned char *ack_buf;
827};
828
829struct nexio_touch_packet {
830 u8 flags; /* 0xe1 = touch, 0xe1 = release */
831 __be16 data_len; /* total bytes of touch data */
832 __be16 x_len; /* bytes for X axis */
833 __be16 y_len; /* bytes for Y axis */
834 u8 data[];
835} __attribute__ ((packed));
836
837static unsigned char nexio_ack_pkt[2] = { 0xaa, 0x02 };
838static unsigned char nexio_init_pkt[4] = { 0x82, 0x04, 0x0a, 0x0f };
839
840static void nexio_ack_complete(struct urb *urb)
841{
842}
843
844static int nexio_alloc(struct usbtouch_usb *usbtouch)
845{
846 struct nexio_priv *priv;
847 int ret = -ENOMEM;
848
849 usbtouch->priv = kmalloc(sizeof(struct nexio_priv), GFP_KERNEL);
850 if (!usbtouch->priv)
851 goto out_buf;
852
853 priv = usbtouch->priv;
854
855 priv->ack_buf = kmemdup(nexio_ack_pkt, sizeof(nexio_ack_pkt),
856 GFP_KERNEL);
857 if (!priv->ack_buf)
858 goto err_priv;
859
860 priv->ack = usb_alloc_urb(0, GFP_KERNEL);
861 if (!priv->ack) {
862 dev_dbg(&usbtouch->interface->dev,
863 "%s - usb_alloc_urb failed: usbtouch->ack\n", __func__);
864 goto err_ack_buf;
865 }
866
867 return 0;
868
869err_ack_buf:
870 kfree(priv->ack_buf);
871err_priv:
872 kfree(priv);
873out_buf:
874 return ret;
875}
876
877static int nexio_init(struct usbtouch_usb *usbtouch)
878{
879 struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
880 struct usb_host_interface *interface = usbtouch->interface->cur_altsetting;
881 struct nexio_priv *priv = usbtouch->priv;
882 int ret = -ENOMEM;
883 int actual_len, i;
884 unsigned char *buf;
885 char *firmware_ver = NULL, *device_name = NULL;
886 int input_ep = 0, output_ep = 0;
887
888 /* find first input and output endpoint */
889 for (i = 0; i < interface->desc.bNumEndpoints; i++) {
890 if (!input_ep &&
891 usb_endpoint_dir_in(&interface->endpoint[i].desc))
892 input_ep = interface->endpoint[i].desc.bEndpointAddress;
893 if (!output_ep &&
894 usb_endpoint_dir_out(&interface->endpoint[i].desc))
895 output_ep = interface->endpoint[i].desc.bEndpointAddress;
896 }
897 if (!input_ep || !output_ep)
898 return -ENXIO;
899
900 buf = kmalloc(NEXIO_BUFSIZE, GFP_NOIO);
901 if (!buf)
902 goto out_buf;
903
904 /* two empty reads */
905 for (i = 0; i < 2; i++) {
906 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
907 buf, NEXIO_BUFSIZE, &actual_len,
908 NEXIO_TIMEOUT);
909 if (ret < 0)
910 goto out_buf;
911 }
912
913 /* send init command */
914 memcpy(buf, nexio_init_pkt, sizeof(nexio_init_pkt));
915 ret = usb_bulk_msg(dev, usb_sndbulkpipe(dev, output_ep),
916 buf, sizeof(nexio_init_pkt), &actual_len,
917 NEXIO_TIMEOUT);
918 if (ret < 0)
919 goto out_buf;
920
921 /* read replies */
922 for (i = 0; i < 3; i++) {
923 memset(buf, 0, NEXIO_BUFSIZE);
924 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
925 buf, NEXIO_BUFSIZE, &actual_len,
926 NEXIO_TIMEOUT);
927 if (ret < 0 || actual_len < 1 || buf[1] != actual_len)
928 continue;
929 switch (buf[0]) {
930 case 0x83: /* firmware version */
931 if (!firmware_ver)
932 firmware_ver = kstrdup(&buf[2], GFP_NOIO);
933 break;
934 case 0x84: /* device name */
935 if (!device_name)
936 device_name = kstrdup(&buf[2], GFP_NOIO);
937 break;
938 }
939 }
940
941 printk(KERN_INFO "Nexio device: %s, firmware version: %s\n",
942 device_name, firmware_ver);
943
944 kfree(firmware_ver);
945 kfree(device_name);
946
947 usb_fill_bulk_urb(priv->ack, dev, usb_sndbulkpipe(dev, output_ep),
948 priv->ack_buf, sizeof(nexio_ack_pkt),
949 nexio_ack_complete, usbtouch);
950 ret = 0;
951
952out_buf:
953 kfree(buf);
954 return ret;
955}
956
957static void nexio_exit(struct usbtouch_usb *usbtouch)
958{
959 struct nexio_priv *priv = usbtouch->priv;
960
961 usb_kill_urb(priv->ack);
962 usb_free_urb(priv->ack);
963 kfree(priv->ack_buf);
964 kfree(priv);
965}
966
967static int nexio_read_data(struct usbtouch_usb *usbtouch, unsigned char *pkt)
968{
969 struct nexio_touch_packet *packet = (void *) pkt;
970 struct nexio_priv *priv = usbtouch->priv;
971 unsigned int data_len = be16_to_cpu(packet->data_len);
972 unsigned int x_len = be16_to_cpu(packet->x_len);
973 unsigned int y_len = be16_to_cpu(packet->y_len);
974 int x, y, begin_x, begin_y, end_x, end_y, w, h, ret;
975
976 /* got touch data? */
977 if ((pkt[0] & 0xe0) != 0xe0)
978 return 0;
979
980 if (data_len > 0xff)
981 data_len -= 0x100;
982 if (x_len > 0xff)
983 x_len -= 0x80;
984
985 /* send ACK */
986 ret = usb_submit_urb(priv->ack, GFP_ATOMIC);
987
988 if (!usbtouch->type->max_xc) {
989 usbtouch->type->max_xc = 2 * x_len;
990 input_set_abs_params(usbtouch->input, ABS_X,
991 0, usbtouch->type->max_xc, 0, 0);
992 usbtouch->type->max_yc = 2 * y_len;
993 input_set_abs_params(usbtouch->input, ABS_Y,
994 0, usbtouch->type->max_yc, 0, 0);
995 }
996 /*
997 * The device reports state of IR sensors on X and Y axes.
998 * Each byte represents "darkness" percentage (0-100) of one element.
999 * 17" touchscreen reports only 64 x 52 bytes so the resolution is low.
1000 * This also means that there's a limited multi-touch capability but
1001 * it's disabled (and untested) here as there's no X driver for that.
1002 */
1003 begin_x = end_x = begin_y = end_y = -1;
1004 for (x = 0; x < x_len; x++) {
1005 if (begin_x == -1 && packet->data[x] > NEXIO_THRESHOLD) {
1006 begin_x = x;
1007 continue;
1008 }
1009 if (end_x == -1 && begin_x != -1 && packet->data[x] < NEXIO_THRESHOLD) {
1010 end_x = x - 1;
1011 for (y = x_len; y < data_len; y++) {
1012 if (begin_y == -1 && packet->data[y] > NEXIO_THRESHOLD) {
1013 begin_y = y - x_len;
1014 continue;
1015 }
1016 if (end_y == -1 &&
1017 begin_y != -1 && packet->data[y] < NEXIO_THRESHOLD) {
1018 end_y = y - 1 - x_len;
1019 w = end_x - begin_x;
1020 h = end_y - begin_y;
1021#if 0
1022 /* multi-touch */
1023 input_report_abs(usbtouch->input,
1024 ABS_MT_TOUCH_MAJOR, max(w,h));
1025 input_report_abs(usbtouch->input,
1026 ABS_MT_TOUCH_MINOR, min(x,h));
1027 input_report_abs(usbtouch->input,
1028 ABS_MT_POSITION_X, 2*begin_x+w);
1029 input_report_abs(usbtouch->input,
1030 ABS_MT_POSITION_Y, 2*begin_y+h);
1031 input_report_abs(usbtouch->input,
1032 ABS_MT_ORIENTATION, w > h);
1033 input_mt_sync(usbtouch->input);
1034#endif
1035 /* single touch */
1036 usbtouch->x = 2 * begin_x + w;
1037 usbtouch->y = 2 * begin_y + h;
1038 usbtouch->touch = packet->flags & 0x01;
1039 begin_y = end_y = -1;
1040 return 1;
1041 }
1042 }
1043 begin_x = end_x = -1;
1044 }
1045
1046 }
1047 return 0;
1048}
1049#endif
1050
1051
1052/*****************************************************************************
1053 * ELO part
1054 */
1055
1056#ifdef CONFIG_TOUCHSCREEN_USB_ELO
1057
1058static int elo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
1059{
1060 dev->x = (pkt[3] << 8) | pkt[2];
1061 dev->y = (pkt[5] << 8) | pkt[4];
1062 dev->touch = pkt[6] > 0;
1063 dev->press = pkt[6];
1064
1065 return 1;
1066}
1067#endif
1068
1069
1070/*****************************************************************************
1071 * the different device descriptors
1072 */
1073#ifdef MULTI_PACKET
1074static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1075 unsigned char *pkt, int len);
1076#endif
1077
1078static struct usbtouch_device_info usbtouch_dev_info[] = {
1079#ifdef CONFIG_TOUCHSCREEN_USB_ELO
1080 [DEVTYPE_ELO] = {
1081 .min_xc = 0x0,
1082 .max_xc = 0x0fff,
1083 .min_yc = 0x0,
1084 .max_yc = 0x0fff,
1085 .max_press = 0xff,
1086 .rept_size = 8,
1087 .read_data = elo_read_data,
1088 },
1089#endif
1090
1091#ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
1092 [DEVTYPE_EGALAX] = {
1093 .min_xc = 0x0,
1094 .max_xc = 0x07ff,
1095 .min_yc = 0x0,
1096 .max_yc = 0x07ff,
1097 .rept_size = 16,
1098 .process_pkt = usbtouch_process_multi,
1099 .get_pkt_len = egalax_get_pkt_len,
1100 .read_data = egalax_read_data,
1101 .init = egalax_init,
1102 },
1103#endif
1104
1105#ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
1106 [DEVTYPE_PANJIT] = {
1107 .min_xc = 0x0,
1108 .max_xc = 0x0fff,
1109 .min_yc = 0x0,
1110 .max_yc = 0x0fff,
1111 .rept_size = 8,
1112 .read_data = panjit_read_data,
1113 },
1114#endif
1115
1116#ifdef CONFIG_TOUCHSCREEN_USB_3M
1117 [DEVTYPE_3M] = {
1118 .min_xc = 0x0,
1119 .max_xc = 0x4000,
1120 .min_yc = 0x0,
1121 .max_yc = 0x4000,
1122 .rept_size = 11,
1123 .read_data = mtouch_read_data,
1124 .init = mtouch_init,
1125 },
1126#endif
1127
1128#ifdef CONFIG_TOUCHSCREEN_USB_ITM
1129 [DEVTYPE_ITM] = {
1130 .min_xc = 0x0,
1131 .max_xc = 0x0fff,
1132 .min_yc = 0x0,
1133 .max_yc = 0x0fff,
1134 .max_press = 0xff,
1135 .rept_size = 8,
1136 .read_data = itm_read_data,
1137 },
1138#endif
1139
1140#ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
1141 [DEVTYPE_ETURBO] = {
1142 .min_xc = 0x0,
1143 .max_xc = 0x07ff,
1144 .min_yc = 0x0,
1145 .max_yc = 0x07ff,
1146 .rept_size = 8,
1147 .process_pkt = usbtouch_process_multi,
1148 .get_pkt_len = eturbo_get_pkt_len,
1149 .read_data = eturbo_read_data,
1150 },
1151#endif
1152
1153#ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
1154 [DEVTYPE_GUNZE] = {
1155 .min_xc = 0x0,
1156 .max_xc = 0x0fff,
1157 .min_yc = 0x0,
1158 .max_yc = 0x0fff,
1159 .rept_size = 4,
1160 .read_data = gunze_read_data,
1161 },
1162#endif
1163
1164#ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
1165 [DEVTYPE_DMC_TSC10] = {
1166 .min_xc = 0x0,
1167 .max_xc = 0x03ff,
1168 .min_yc = 0x0,
1169 .max_yc = 0x03ff,
1170 .rept_size = 5,
1171 .init = dmc_tsc10_init,
1172 .read_data = dmc_tsc10_read_data,
1173 },
1174#endif
1175
1176#ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
1177 [DEVTYPE_IRTOUCH] = {
1178 .min_xc = 0x0,
1179 .max_xc = 0x0fff,
1180 .min_yc = 0x0,
1181 .max_yc = 0x0fff,
1182 .rept_size = 8,
1183 .read_data = irtouch_read_data,
1184 },
1185
1186 [DEVTYPE_IRTOUCH_HIRES] = {
1187 .min_xc = 0x0,
1188 .max_xc = 0x7fff,
1189 .min_yc = 0x0,
1190 .max_yc = 0x7fff,
1191 .rept_size = 8,
1192 .read_data = irtouch_read_data,
1193 },
1194#endif
1195
1196#ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
1197 [DEVTYPE_IDEALTEK] = {
1198 .min_xc = 0x0,
1199 .max_xc = 0x0fff,
1200 .min_yc = 0x0,
1201 .max_yc = 0x0fff,
1202 .rept_size = 8,
1203 .process_pkt = usbtouch_process_multi,
1204 .get_pkt_len = idealtek_get_pkt_len,
1205 .read_data = idealtek_read_data,
1206 },
1207#endif
1208
1209#ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
1210 [DEVTYPE_GENERAL_TOUCH] = {
1211 .min_xc = 0x0,
1212 .max_xc = 0x7fff,
1213 .min_yc = 0x0,
1214 .max_yc = 0x7fff,
1215 .rept_size = 7,
1216 .read_data = general_touch_read_data,
1217 },
1218#endif
1219
1220#ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
1221 [DEVTYPE_GOTOP] = {
1222 .min_xc = 0x0,
1223 .max_xc = 0x03ff,
1224 .min_yc = 0x0,
1225 .max_yc = 0x03ff,
1226 .rept_size = 4,
1227 .read_data = gotop_read_data,
1228 },
1229#endif
1230
1231#ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
1232 [DEVTYPE_JASTEC] = {
1233 .min_xc = 0x0,
1234 .max_xc = 0x0fff,
1235 .min_yc = 0x0,
1236 .max_yc = 0x0fff,
1237 .rept_size = 4,
1238 .read_data = jastec_read_data,
1239 },
1240#endif
1241
1242#ifdef CONFIG_TOUCHSCREEN_USB_E2I
1243 [DEVTYPE_E2I] = {
1244 .min_xc = 0x0,
1245 .max_xc = 0x7fff,
1246 .min_yc = 0x0,
1247 .max_yc = 0x7fff,
1248 .rept_size = 6,
1249 .init = e2i_init,
1250 .read_data = e2i_read_data,
1251 },
1252#endif
1253
1254#ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
1255 [DEVTYPE_ZYTRONIC] = {
1256 .min_xc = 0x0,
1257 .max_xc = 0x03ff,
1258 .min_yc = 0x0,
1259 .max_yc = 0x03ff,
1260 .rept_size = 5,
1261 .read_data = zytronic_read_data,
1262 .irq_always = true,
1263 },
1264#endif
1265
1266#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
1267 [DEVTYPE_TC45USB] = {
1268 .min_xc = 0x0,
1269 .max_xc = 0x0fff,
1270 .min_yc = 0x0,
1271 .max_yc = 0x0fff,
1272 .rept_size = 5,
1273 .read_data = tc45usb_read_data,
1274 },
1275#endif
1276
1277#ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
1278 [DEVTYPE_NEXIO] = {
1279 .rept_size = 1024,
1280 .irq_always = true,
1281 .read_data = nexio_read_data,
1282 .alloc = nexio_alloc,
1283 .init = nexio_init,
1284 .exit = nexio_exit,
1285 },
1286#endif
1287#ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
1288 [DEVTYPE_ETOUCH] = {
1289 .min_xc = 0x0,
1290 .max_xc = 0x07ff,
1291 .min_yc = 0x0,
1292 .max_yc = 0x07ff,
1293 .rept_size = 16,
1294 .process_pkt = usbtouch_process_multi,
1295 .get_pkt_len = etouch_get_pkt_len,
1296 .read_data = etouch_read_data,
1297 },
1298#endif
1299};
1300
1301
1302/*****************************************************************************
1303 * Generic Part
1304 */
1305static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
1306 unsigned char *pkt, int len)
1307{
1308 struct usbtouch_device_info *type = usbtouch->type;
1309
1310 if (!type->read_data(usbtouch, pkt))
1311 return;
1312
1313 input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch);
1314
1315 if (swap_xy) {
1316 input_report_abs(usbtouch->input, ABS_X, usbtouch->y);
1317 input_report_abs(usbtouch->input, ABS_Y, usbtouch->x);
1318 } else {
1319 input_report_abs(usbtouch->input, ABS_X, usbtouch->x);
1320 input_report_abs(usbtouch->input, ABS_Y, usbtouch->y);
1321 }
1322 if (type->max_press)
1323 input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press);
1324 input_sync(usbtouch->input);
1325}
1326
1327
1328#ifdef MULTI_PACKET
1329static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1330 unsigned char *pkt, int len)
1331{
1332 unsigned char *buffer;
1333 int pkt_len, pos, buf_len, tmp;
1334
1335 /* process buffer */
1336 if (unlikely(usbtouch->buf_len)) {
1337 /* try to get size */
1338 pkt_len = usbtouch->type->get_pkt_len(
1339 usbtouch->buffer, usbtouch->buf_len);
1340
1341 /* drop? */
1342 if (unlikely(!pkt_len))
1343 goto out_flush_buf;
1344
1345 /* need to append -pkt_len bytes before able to get size */
1346 if (unlikely(pkt_len < 0)) {
1347 int append = -pkt_len;
1348 if (unlikely(append > len))
1349 append = len;
1350 if (usbtouch->buf_len + append >= usbtouch->type->rept_size)
1351 goto out_flush_buf;
1352 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append);
1353 usbtouch->buf_len += append;
1354
1355 pkt_len = usbtouch->type->get_pkt_len(
1356 usbtouch->buffer, usbtouch->buf_len);
1357 if (pkt_len < 0)
1358 return;
1359 }
1360
1361 /* append */
1362 tmp = pkt_len - usbtouch->buf_len;
1363 if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size)
1364 goto out_flush_buf;
1365 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp);
1366 usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len);
1367
1368 buffer = pkt + tmp;
1369 buf_len = len - tmp;
1370 } else {
1371 buffer = pkt;
1372 buf_len = len;
1373 }
1374
1375 /* loop over the received packet, process */
1376 pos = 0;
1377 while (pos < buf_len) {
1378 /* get packet len */
1379 pkt_len = usbtouch->type->get_pkt_len(buffer + pos,
1380 buf_len - pos);
1381
1382 /* unknown packet: skip one byte */
1383 if (unlikely(!pkt_len)) {
1384 pos++;
1385 continue;
1386 }
1387
1388 /* full packet: process */
1389 if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) {
1390 usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len);
1391 } else {
1392 /* incomplete packet: save in buffer */
1393 memcpy(usbtouch->buffer, buffer + pos, buf_len - pos);
1394 usbtouch->buf_len = buf_len - pos;
1395 return;
1396 }
1397 pos += pkt_len;
1398 }
1399
1400out_flush_buf:
1401 usbtouch->buf_len = 0;
1402 return;
1403}
1404#endif
1405
1406
1407static void usbtouch_irq(struct urb *urb)
1408{
1409 struct usbtouch_usb *usbtouch = urb->context;
1410 struct device *dev = &usbtouch->interface->dev;
1411 int retval;
1412
1413 switch (urb->status) {
1414 case 0:
1415 /* success */
1416 break;
1417 case -ETIME:
1418 /* this urb is timing out */
1419 dev_dbg(dev,
1420 "%s - urb timed out - was the device unplugged?\n",
1421 __func__);
1422 return;
1423 case -ECONNRESET:
1424 case -ENOENT:
1425 case -ESHUTDOWN:
1426 case -EPIPE:
1427 /* this urb is terminated, clean up */
1428 dev_dbg(dev, "%s - urb shutting down with status: %d\n",
1429 __func__, urb->status);
1430 return;
1431 default:
1432 dev_dbg(dev, "%s - nonzero urb status received: %d\n",
1433 __func__, urb->status);
1434 goto exit;
1435 }
1436
1437 usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length);
1438
1439exit:
1440 usb_mark_last_busy(interface_to_usbdev(usbtouch->interface));
1441 retval = usb_submit_urb(urb, GFP_ATOMIC);
1442 if (retval)
1443 dev_err(dev, "%s - usb_submit_urb failed with result: %d\n",
1444 __func__, retval);
1445}
1446
1447static int usbtouch_open(struct input_dev *input)
1448{
1449 struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1450 int r;
1451
1452 usbtouch->irq->dev = interface_to_usbdev(usbtouch->interface);
1453
1454 r = usb_autopm_get_interface(usbtouch->interface) ? -EIO : 0;
1455 if (r < 0)
1456 goto out;
1457
1458 if (!usbtouch->type->irq_always) {
1459 if (usb_submit_urb(usbtouch->irq, GFP_KERNEL)) {
1460 r = -EIO;
1461 goto out_put;
1462 }
1463 }
1464
1465 usbtouch->interface->needs_remote_wakeup = 1;
1466out_put:
1467 usb_autopm_put_interface(usbtouch->interface);
1468out:
1469 return r;
1470}
1471
1472static void usbtouch_close(struct input_dev *input)
1473{
1474 struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1475 int r;
1476
1477 if (!usbtouch->type->irq_always)
1478 usb_kill_urb(usbtouch->irq);
1479 r = usb_autopm_get_interface(usbtouch->interface);
1480 usbtouch->interface->needs_remote_wakeup = 0;
1481 if (!r)
1482 usb_autopm_put_interface(usbtouch->interface);
1483}
1484
1485static int usbtouch_suspend
1486(struct usb_interface *intf, pm_message_t message)
1487{
1488 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1489
1490 usb_kill_urb(usbtouch->irq);
1491
1492 return 0;
1493}
1494
1495static int usbtouch_resume(struct usb_interface *intf)
1496{
1497 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1498 struct input_dev *input = usbtouch->input;
1499 int result = 0;
1500
1501 mutex_lock(&input->mutex);
1502 if (input->users || usbtouch->type->irq_always)
1503 result = usb_submit_urb(usbtouch->irq, GFP_NOIO);
1504 mutex_unlock(&input->mutex);
1505
1506 return result;
1507}
1508
1509static int usbtouch_reset_resume(struct usb_interface *intf)
1510{
1511 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1512 struct input_dev *input = usbtouch->input;
1513 int err = 0;
1514
1515 /* reinit the device */
1516 if (usbtouch->type->init) {
1517 err = usbtouch->type->init(usbtouch);
1518 if (err) {
1519 dev_dbg(&intf->dev,
1520 "%s - type->init() failed, err: %d\n",
1521 __func__, err);
1522 return err;
1523 }
1524 }
1525
1526 /* restart IO if needed */
1527 mutex_lock(&input->mutex);
1528 if (input->users)
1529 err = usb_submit_urb(usbtouch->irq, GFP_NOIO);
1530 mutex_unlock(&input->mutex);
1531
1532 return err;
1533}
1534
1535static void usbtouch_free_buffers(struct usb_device *udev,
1536 struct usbtouch_usb *usbtouch)
1537{
1538 usb_free_coherent(udev, usbtouch->data_size,
1539 usbtouch->data, usbtouch->data_dma);
1540 kfree(usbtouch->buffer);
1541}
1542
1543static struct usb_endpoint_descriptor *
1544usbtouch_get_input_endpoint(struct usb_host_interface *interface)
1545{
1546 int i;
1547
1548 for (i = 0; i < interface->desc.bNumEndpoints; i++)
1549 if (usb_endpoint_dir_in(&interface->endpoint[i].desc))
1550 return &interface->endpoint[i].desc;
1551
1552 return NULL;
1553}
1554
1555static int usbtouch_probe(struct usb_interface *intf,
1556 const struct usb_device_id *id)
1557{
1558 struct usbtouch_usb *usbtouch;
1559 struct input_dev *input_dev;
1560 struct usb_endpoint_descriptor *endpoint;
1561 struct usb_device *udev = interface_to_usbdev(intf);
1562 struct usbtouch_device_info *type;
1563 int err = -ENOMEM;
1564
1565 /* some devices are ignored */
1566 if (id->driver_info == DEVTYPE_IGNORE)
1567 return -ENODEV;
1568
1569 endpoint = usbtouch_get_input_endpoint(intf->cur_altsetting);
1570 if (!endpoint)
1571 return -ENXIO;
1572
1573 usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL);
1574 input_dev = input_allocate_device();
1575 if (!usbtouch || !input_dev)
1576 goto out_free;
1577
1578 type = &usbtouch_dev_info[id->driver_info];
1579 usbtouch->type = type;
1580 if (!type->process_pkt)
1581 type->process_pkt = usbtouch_process_pkt;
1582
1583 usbtouch->data_size = type->rept_size;
1584 if (type->get_pkt_len) {
1585 /*
1586 * When dealing with variable-length packets we should
1587 * not request more than wMaxPacketSize bytes at once
1588 * as we do not know if there is more data coming or
1589 * we filled exactly wMaxPacketSize bytes and there is
1590 * nothing else.
1591 */
1592 usbtouch->data_size = min(usbtouch->data_size,
1593 usb_endpoint_maxp(endpoint));
1594 }
1595
1596 usbtouch->data = usb_alloc_coherent(udev, usbtouch->data_size,
1597 GFP_KERNEL, &usbtouch->data_dma);
1598 if (!usbtouch->data)
1599 goto out_free;
1600
1601 if (type->get_pkt_len) {
1602 usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL);
1603 if (!usbtouch->buffer)
1604 goto out_free_buffers;
1605 }
1606
1607 usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
1608 if (!usbtouch->irq) {
1609 dev_dbg(&intf->dev,
1610 "%s - usb_alloc_urb failed: usbtouch->irq\n", __func__);
1611 goto out_free_buffers;
1612 }
1613
1614 usbtouch->interface = intf;
1615 usbtouch->input = input_dev;
1616
1617 if (udev->manufacturer)
1618 strlcpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name));
1619
1620 if (udev->product) {
1621 if (udev->manufacturer)
1622 strlcat(usbtouch->name, " ", sizeof(usbtouch->name));
1623 strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name));
1624 }
1625
1626 if (!strlen(usbtouch->name))
1627 snprintf(usbtouch->name, sizeof(usbtouch->name),
1628 "USB Touchscreen %04x:%04x",
1629 le16_to_cpu(udev->descriptor.idVendor),
1630 le16_to_cpu(udev->descriptor.idProduct));
1631
1632 usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys));
1633 strlcat(usbtouch->phys, "/input0", sizeof(usbtouch->phys));
1634
1635 input_dev->name = usbtouch->name;
1636 input_dev->phys = usbtouch->phys;
1637 usb_to_input_id(udev, &input_dev->id);
1638 input_dev->dev.parent = &intf->dev;
1639
1640 input_set_drvdata(input_dev, usbtouch);
1641
1642 input_dev->open = usbtouch_open;
1643 input_dev->close = usbtouch_close;
1644
1645 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
1646 input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
1647 input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0);
1648 input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0);
1649 if (type->max_press)
1650 input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press,
1651 type->max_press, 0, 0);
1652
1653 if (usb_endpoint_type(endpoint) == USB_ENDPOINT_XFER_INT)
1654 usb_fill_int_urb(usbtouch->irq, udev,
1655 usb_rcvintpipe(udev, endpoint->bEndpointAddress),
1656 usbtouch->data, usbtouch->data_size,
1657 usbtouch_irq, usbtouch, endpoint->bInterval);
1658 else
1659 usb_fill_bulk_urb(usbtouch->irq, udev,
1660 usb_rcvbulkpipe(udev, endpoint->bEndpointAddress),
1661 usbtouch->data, usbtouch->data_size,
1662 usbtouch_irq, usbtouch);
1663
1664 usbtouch->irq->dev = udev;
1665 usbtouch->irq->transfer_dma = usbtouch->data_dma;
1666 usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1667
1668 /* device specific allocations */
1669 if (type->alloc) {
1670 err = type->alloc(usbtouch);
1671 if (err) {
1672 dev_dbg(&intf->dev,
1673 "%s - type->alloc() failed, err: %d\n",
1674 __func__, err);
1675 goto out_free_urb;
1676 }
1677 }
1678
1679 /* device specific initialisation*/
1680 if (type->init) {
1681 err = type->init(usbtouch);
1682 if (err) {
1683 dev_dbg(&intf->dev,
1684 "%s - type->init() failed, err: %d\n",
1685 __func__, err);
1686 goto out_do_exit;
1687 }
1688 }
1689
1690 err = input_register_device(usbtouch->input);
1691 if (err) {
1692 dev_dbg(&intf->dev,
1693 "%s - input_register_device failed, err: %d\n",
1694 __func__, err);
1695 goto out_do_exit;
1696 }
1697
1698 usb_set_intfdata(intf, usbtouch);
1699
1700 if (usbtouch->type->irq_always) {
1701 /* this can't fail */
1702 usb_autopm_get_interface(intf);
1703 err = usb_submit_urb(usbtouch->irq, GFP_KERNEL);
1704 if (err) {
1705 usb_autopm_put_interface(intf);
1706 dev_err(&intf->dev,
1707 "%s - usb_submit_urb failed with result: %d\n",
1708 __func__, err);
1709 goto out_unregister_input;
1710 }
1711 }
1712
1713 return 0;
1714
1715out_unregister_input:
1716 input_unregister_device(input_dev);
1717 input_dev = NULL;
1718out_do_exit:
1719 if (type->exit)
1720 type->exit(usbtouch);
1721out_free_urb:
1722 usb_free_urb(usbtouch->irq);
1723out_free_buffers:
1724 usbtouch_free_buffers(udev, usbtouch);
1725out_free:
1726 input_free_device(input_dev);
1727 kfree(usbtouch);
1728 return err;
1729}
1730
1731static void usbtouch_disconnect(struct usb_interface *intf)
1732{
1733 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1734
1735 if (!usbtouch)
1736 return;
1737
1738 dev_dbg(&intf->dev,
1739 "%s - usbtouch is initialized, cleaning up\n", __func__);
1740
1741 usb_set_intfdata(intf, NULL);
1742 /* this will stop IO via close */
1743 input_unregister_device(usbtouch->input);
1744 usb_free_urb(usbtouch->irq);
1745 if (usbtouch->type->exit)
1746 usbtouch->type->exit(usbtouch);
1747 usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch);
1748 kfree(usbtouch);
1749}
1750
1751MODULE_DEVICE_TABLE(usb, usbtouch_devices);
1752
1753static struct usb_driver usbtouch_driver = {
1754 .name = "usbtouchscreen",
1755 .probe = usbtouch_probe,
1756 .disconnect = usbtouch_disconnect,
1757 .suspend = usbtouch_suspend,
1758 .resume = usbtouch_resume,
1759 .reset_resume = usbtouch_reset_resume,
1760 .id_table = usbtouch_devices,
1761 .supports_autosuspend = 1,
1762};
1763
1764module_usb_driver(usbtouch_driver);
1765
1766MODULE_AUTHOR(DRIVER_AUTHOR);
1767MODULE_DESCRIPTION(DRIVER_DESC);
1768MODULE_LICENSE("GPL");
1769
1770MODULE_ALIAS("touchkitusb");
1771MODULE_ALIAS("itmtouch");
1772MODULE_ALIAS("mtouchusb");