tjh.dev
Linux kernel mirror (for testing)
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linux
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");