tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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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 *
17 * Copyright (C) 2004-2007 by Daniel Ritz <daniel.ritz@gmx.ch>
18 * Copyright (C) by Todd E. Johnson (mtouchusb.c)
19 *
20 * This program is free software; you can redistribute it and/or
21 * modify it under the terms of the GNU General Public License as
22 * published by the Free Software Foundation; either version 2 of the
23 * License, or (at your option) any later version.
24 *
25 * This program is distributed in the hope that it will be useful, but
26 * WITHOUT ANY WARRANTY; without even the implied warranty of
27 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
28 * General Public License for more details.
29 *
30 * You should have received a copy of the GNU General Public License
31 * along with this program; if not, write to the Free Software
32 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
33 *
34 * Driver is based on touchkitusb.c
35 * - ITM parts are from itmtouch.c
36 * - 3M parts are from mtouchusb.c
37 * - PanJit parts are from an unmerged driver by Lanslott Gish
38 * - DMC TSC 10/25 are from Holger Schurig, with ideas from an unmerged
39 * driver from Marius Vollmer
40 *
41 *****************************************************************************/
42
43//#define DEBUG
44
45#include <linux/kernel.h>
46#include <linux/slab.h>
47#include <linux/input.h>
48#include <linux/module.h>
49#include <linux/init.h>
50#include <linux/usb.h>
51#include <linux/usb/input.h>
52#include <linux/hid.h>
53
54
55#define DRIVER_VERSION "v0.6"
56#define DRIVER_AUTHOR "Daniel Ritz <daniel.ritz@gmx.ch>"
57#define DRIVER_DESC "USB Touchscreen Driver"
58
59static int swap_xy;
60module_param(swap_xy, bool, 0644);
61MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");
62
63/* device specifc data/functions */
64struct usbtouch_usb;
65struct usbtouch_device_info {
66 int min_xc, max_xc;
67 int min_yc, max_yc;
68 int min_press, max_press;
69 int rept_size;
70
71 void (*process_pkt) (struct usbtouch_usb *usbtouch, unsigned char *pkt, int len);
72
73 /*
74 * used to get the packet len. possible return values:
75 * > 0: packet len
76 * = 0: skip one byte
77 * < 0: -return value more bytes needed
78 */
79 int (*get_pkt_len) (unsigned char *pkt, int len);
80
81 int (*read_data) (struct usbtouch_usb *usbtouch, unsigned char *pkt);
82 int (*init) (struct usbtouch_usb *usbtouch);
83};
84
85/* a usbtouch device */
86struct usbtouch_usb {
87 unsigned char *data;
88 dma_addr_t data_dma;
89 unsigned char *buffer;
90 int buf_len;
91 struct urb *irq;
92 struct usb_device *udev;
93 struct input_dev *input;
94 struct usbtouch_device_info *type;
95 char name[128];
96 char phys[64];
97
98 int x, y;
99 int touch, press;
100};
101
102
103/* device types */
104enum {
105 DEVTYPE_IGNORE = -1,
106 DEVTYPE_EGALAX,
107 DEVTYPE_PANJIT,
108 DEVTYPE_3M,
109 DEVTYPE_ITM,
110 DEVTYPE_ETURBO,
111 DEVTYPE_GUNZE,
112 DEVTYPE_DMC_TSC10,
113 DEVTYPE_IRTOUCH,
114 DEVTYPE_IDEALTEK,
115 DEVTYPE_GENERAL_TOUCH,
116 DEVTYPE_GOTOP,
117};
118
119#define USB_DEVICE_HID_CLASS(vend, prod) \
120 .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS \
121 | USB_DEVICE_ID_MATCH_DEVICE, \
122 .idVendor = (vend), \
123 .idProduct = (prod), \
124 .bInterfaceClass = USB_INTERFACE_CLASS_HID, \
125 .bInterfaceProtocol = USB_INTERFACE_PROTOCOL_MOUSE
126
127static struct usb_device_id usbtouch_devices[] = {
128#ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
129 /* ignore the HID capable devices, handled by usbhid */
130 {USB_DEVICE_HID_CLASS(0x0eef, 0x0001), .driver_info = DEVTYPE_IGNORE},
131 {USB_DEVICE_HID_CLASS(0x0eef, 0x0002), .driver_info = DEVTYPE_IGNORE},
132
133 /* normal device IDs */
134 {USB_DEVICE(0x3823, 0x0001), .driver_info = DEVTYPE_EGALAX},
135 {USB_DEVICE(0x3823, 0x0002), .driver_info = DEVTYPE_EGALAX},
136 {USB_DEVICE(0x0123, 0x0001), .driver_info = DEVTYPE_EGALAX},
137 {USB_DEVICE(0x0eef, 0x0001), .driver_info = DEVTYPE_EGALAX},
138 {USB_DEVICE(0x0eef, 0x0002), .driver_info = DEVTYPE_EGALAX},
139 {USB_DEVICE(0x1234, 0x0001), .driver_info = DEVTYPE_EGALAX},
140 {USB_DEVICE(0x1234, 0x0002), .driver_info = DEVTYPE_EGALAX},
141#endif
142
143#ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
144 {USB_DEVICE(0x134c, 0x0001), .driver_info = DEVTYPE_PANJIT},
145 {USB_DEVICE(0x134c, 0x0002), .driver_info = DEVTYPE_PANJIT},
146 {USB_DEVICE(0x134c, 0x0003), .driver_info = DEVTYPE_PANJIT},
147 {USB_DEVICE(0x134c, 0x0004), .driver_info = DEVTYPE_PANJIT},
148#endif
149
150#ifdef CONFIG_TOUCHSCREEN_USB_3M
151 {USB_DEVICE(0x0596, 0x0001), .driver_info = DEVTYPE_3M},
152#endif
153
154#ifdef CONFIG_TOUCHSCREEN_USB_ITM
155 {USB_DEVICE(0x0403, 0xf9e9), .driver_info = DEVTYPE_ITM},
156#endif
157
158#ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
159 {USB_DEVICE(0x1234, 0x5678), .driver_info = DEVTYPE_ETURBO},
160#endif
161
162#ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
163 {USB_DEVICE(0x0637, 0x0001), .driver_info = DEVTYPE_GUNZE},
164#endif
165
166#ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
167 {USB_DEVICE(0x0afa, 0x03e8), .driver_info = DEVTYPE_DMC_TSC10},
168#endif
169
170#ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
171 {USB_DEVICE(0x595a, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
172 {USB_DEVICE(0x6615, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
173#endif
174
175#ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
176 {USB_DEVICE(0x1391, 0x1000), .driver_info = DEVTYPE_IDEALTEK},
177#endif
178
179#ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
180 {USB_DEVICE(0x0dfc, 0x0001), .driver_info = DEVTYPE_GENERAL_TOUCH},
181#endif
182
183#ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
184 {USB_DEVICE(0x08f2, 0x007f), .driver_info = DEVTYPE_GOTOP},
185 {USB_DEVICE(0x08f2, 0x00ce), .driver_info = DEVTYPE_GOTOP},
186 {USB_DEVICE(0x08f2, 0x00f4), .driver_info = DEVTYPE_GOTOP},
187#endif
188
189 {}
190};
191
192
193/*****************************************************************************
194 * eGalax part
195 */
196
197#ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
198
199#ifndef MULTI_PACKET
200#define MULTI_PACKET
201#endif
202
203#define EGALAX_PKT_TYPE_MASK 0xFE
204#define EGALAX_PKT_TYPE_REPT 0x80
205#define EGALAX_PKT_TYPE_DIAG 0x0A
206
207static int egalax_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
208{
209 if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT)
210 return 0;
211
212 dev->x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F);
213 dev->y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F);
214 dev->touch = pkt[0] & 0x01;
215
216 return 1;
217}
218
219static int egalax_get_pkt_len(unsigned char *buf, int len)
220{
221 switch (buf[0] & EGALAX_PKT_TYPE_MASK) {
222 case EGALAX_PKT_TYPE_REPT:
223 return 5;
224
225 case EGALAX_PKT_TYPE_DIAG:
226 if (len < 2)
227 return -1;
228
229 return buf[1] + 2;
230 }
231
232 return 0;
233}
234#endif
235
236
237/*****************************************************************************
238 * PanJit Part
239 */
240#ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
241static int panjit_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
242{
243 dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
244 dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
245 dev->touch = pkt[0] & 0x01;
246
247 return 1;
248}
249#endif
250
251
252/*****************************************************************************
253 * 3M/Microtouch Part
254 */
255#ifdef CONFIG_TOUCHSCREEN_USB_3M
256
257#define MTOUCHUSB_ASYNC_REPORT 1
258#define MTOUCHUSB_RESET 7
259#define MTOUCHUSB_REQ_CTRLLR_ID 10
260
261static int mtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
262{
263 dev->x = (pkt[8] << 8) | pkt[7];
264 dev->y = (pkt[10] << 8) | pkt[9];
265 dev->touch = (pkt[2] & 0x40) ? 1 : 0;
266
267 return 1;
268}
269
270static int mtouch_init(struct usbtouch_usb *usbtouch)
271{
272 int ret, i;
273
274 ret = usb_control_msg(usbtouch->udev, usb_rcvctrlpipe(usbtouch->udev, 0),
275 MTOUCHUSB_RESET,
276 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
277 1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
278 dbg("%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d",
279 __func__, ret);
280 if (ret < 0)
281 return ret;
282 msleep(150);
283
284 for (i = 0; i < 3; i++) {
285 ret = usb_control_msg(usbtouch->udev, usb_rcvctrlpipe(usbtouch->udev, 0),
286 MTOUCHUSB_ASYNC_REPORT,
287 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
288 1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT);
289 dbg("%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d",
290 __func__, ret);
291 if (ret >= 0)
292 break;
293 if (ret != -EPIPE)
294 return ret;
295 }
296
297 return 0;
298}
299#endif
300
301
302/*****************************************************************************
303 * ITM Part
304 */
305#ifdef CONFIG_TOUCHSCREEN_USB_ITM
306static int itm_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
307{
308 int touch;
309 /*
310 * ITM devices report invalid x/y data if not touched.
311 * if the screen was touched before but is not touched any more
312 * report touch as 0 with the last valid x/y data once. then stop
313 * reporting data until touched again.
314 */
315 dev->press = ((pkt[2] & 0x01) << 7) | (pkt[5] & 0x7F);
316
317 touch = ~pkt[7] & 0x20;
318 if (!touch) {
319 if (dev->touch) {
320 dev->touch = 0;
321 return 1;
322 }
323
324 return 0;
325 }
326
327 dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F);
328 dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F);
329 dev->touch = touch;
330
331 return 1;
332}
333#endif
334
335
336/*****************************************************************************
337 * eTurboTouch part
338 */
339#ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
340#ifndef MULTI_PACKET
341#define MULTI_PACKET
342#endif
343static int eturbo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
344{
345 unsigned int shift;
346
347 /* packets should start with sync */
348 if (!(pkt[0] & 0x80))
349 return 0;
350
351 shift = (6 - (pkt[0] & 0x03));
352 dev->x = ((pkt[3] << 7) | pkt[4]) >> shift;
353 dev->y = ((pkt[1] << 7) | pkt[2]) >> shift;
354 dev->touch = (pkt[0] & 0x10) ? 1 : 0;
355
356 return 1;
357}
358
359static int eturbo_get_pkt_len(unsigned char *buf, int len)
360{
361 if (buf[0] & 0x80)
362 return 5;
363 if (buf[0] == 0x01)
364 return 3;
365 return 0;
366}
367#endif
368
369
370/*****************************************************************************
371 * Gunze part
372 */
373#ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
374static int gunze_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
375{
376 if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80))
377 return 0;
378
379 dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F);
380 dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F);
381 dev->touch = pkt[0] & 0x20;
382
383 return 1;
384}
385#endif
386
387/*****************************************************************************
388 * DMC TSC-10/25 Part
389 *
390 * Documentation about the controller and it's protocol can be found at
391 * http://www.dmccoltd.com/files/controler/tsc10usb_pi_e.pdf
392 * http://www.dmccoltd.com/files/controler/tsc25_usb_e.pdf
393 */
394#ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
395
396/* supported data rates. currently using 130 */
397#define TSC10_RATE_POINT 0x50
398#define TSC10_RATE_30 0x40
399#define TSC10_RATE_50 0x41
400#define TSC10_RATE_80 0x42
401#define TSC10_RATE_100 0x43
402#define TSC10_RATE_130 0x44
403#define TSC10_RATE_150 0x45
404
405/* commands */
406#define TSC10_CMD_RESET 0x55
407#define TSC10_CMD_RATE 0x05
408#define TSC10_CMD_DATA1 0x01
409
410static int dmc_tsc10_init(struct usbtouch_usb *usbtouch)
411{
412 struct usb_device *dev = usbtouch->udev;
413 int ret = -ENOMEM;
414 unsigned char *buf;
415
416 buf = kmalloc(2, GFP_KERNEL);
417 if (!buf)
418 goto err_nobuf;
419 /* reset */
420 buf[0] = buf[1] = 0xFF;
421 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
422 TSC10_CMD_RESET,
423 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
424 0, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
425 if (ret < 0)
426 goto err_out;
427 if (buf[0] != 0x06 || buf[1] != 0x00) {
428 ret = -ENODEV;
429 goto err_out;
430 }
431
432 /* set coordinate output rate */
433 buf[0] = buf[1] = 0xFF;
434 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
435 TSC10_CMD_RATE,
436 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
437 TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
438 if (ret < 0)
439 goto err_out;
440 if ((buf[0] != 0x06 || buf[1] != 0x00) &&
441 (buf[0] != 0x15 || buf[1] != 0x01)) {
442 ret = -ENODEV;
443 goto err_out;
444 }
445
446 /* start sending data */
447 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
448 TSC10_CMD_DATA1,
449 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
450 0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
451err_out:
452 kfree(buf);
453err_nobuf:
454 return ret;
455}
456
457
458static int dmc_tsc10_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
459{
460 dev->x = ((pkt[2] & 0x03) << 8) | pkt[1];
461 dev->y = ((pkt[4] & 0x03) << 8) | pkt[3];
462 dev->touch = pkt[0] & 0x01;
463
464 return 1;
465}
466#endif
467
468
469/*****************************************************************************
470 * IRTOUCH Part
471 */
472#ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
473static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
474{
475 dev->x = (pkt[3] << 8) | pkt[2];
476 dev->y = (pkt[5] << 8) | pkt[4];
477 dev->touch = (pkt[1] & 0x03) ? 1 : 0;
478
479 return 1;
480}
481#endif
482
483
484/*****************************************************************************
485 * IdealTEK URTC1000 Part
486 */
487#ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
488#ifndef MULTI_PACKET
489#define MULTI_PACKET
490#endif
491static int idealtek_get_pkt_len(unsigned char *buf, int len)
492{
493 if (buf[0] & 0x80)
494 return 5;
495 if (buf[0] == 0x01)
496 return len;
497 return 0;
498}
499
500static int idealtek_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
501{
502 switch (pkt[0] & 0x98) {
503 case 0x88:
504 /* touch data in IdealTEK mode */
505 dev->x = (pkt[1] << 5) | (pkt[2] >> 2);
506 dev->y = (pkt[3] << 5) | (pkt[4] >> 2);
507 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
508 return 1;
509
510 case 0x98:
511 /* touch data in MT emulation mode */
512 dev->x = (pkt[2] << 5) | (pkt[1] >> 2);
513 dev->y = (pkt[4] << 5) | (pkt[3] >> 2);
514 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
515 return 1;
516
517 default:
518 return 0;
519 }
520}
521#endif
522
523/*****************************************************************************
524 * General Touch Part
525 */
526#ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
527static int general_touch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
528{
529 dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1] ;
530 dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3] ;
531 dev->press = pkt[5] & 0xff;
532 dev->touch = pkt[0] & 0x01;
533
534 return 1;
535}
536#endif
537
538/*****************************************************************************
539 * GoTop Part
540 */
541#ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
542static int gotop_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
543{
544 dev->x = ((pkt[1] & 0x38) << 4) | pkt[2];
545 dev->y = ((pkt[1] & 0x07) << 7) | pkt[3];
546 dev->touch = pkt[0] & 0x01;
547 return 1;
548}
549#endif
550
551
552/*****************************************************************************
553 * the different device descriptors
554 */
555#ifdef MULTI_PACKET
556static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
557 unsigned char *pkt, int len);
558#endif
559
560static struct usbtouch_device_info usbtouch_dev_info[] = {
561#ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
562 [DEVTYPE_EGALAX] = {
563 .min_xc = 0x0,
564 .max_xc = 0x07ff,
565 .min_yc = 0x0,
566 .max_yc = 0x07ff,
567 .rept_size = 16,
568 .process_pkt = usbtouch_process_multi,
569 .get_pkt_len = egalax_get_pkt_len,
570 .read_data = egalax_read_data,
571 },
572#endif
573
574#ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
575 [DEVTYPE_PANJIT] = {
576 .min_xc = 0x0,
577 .max_xc = 0x0fff,
578 .min_yc = 0x0,
579 .max_yc = 0x0fff,
580 .rept_size = 8,
581 .read_data = panjit_read_data,
582 },
583#endif
584
585#ifdef CONFIG_TOUCHSCREEN_USB_3M
586 [DEVTYPE_3M] = {
587 .min_xc = 0x0,
588 .max_xc = 0x4000,
589 .min_yc = 0x0,
590 .max_yc = 0x4000,
591 .rept_size = 11,
592 .read_data = mtouch_read_data,
593 .init = mtouch_init,
594 },
595#endif
596
597#ifdef CONFIG_TOUCHSCREEN_USB_ITM
598 [DEVTYPE_ITM] = {
599 .min_xc = 0x0,
600 .max_xc = 0x0fff,
601 .min_yc = 0x0,
602 .max_yc = 0x0fff,
603 .max_press = 0xff,
604 .rept_size = 8,
605 .read_data = itm_read_data,
606 },
607#endif
608
609#ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
610 [DEVTYPE_ETURBO] = {
611 .min_xc = 0x0,
612 .max_xc = 0x07ff,
613 .min_yc = 0x0,
614 .max_yc = 0x07ff,
615 .rept_size = 8,
616 .process_pkt = usbtouch_process_multi,
617 .get_pkt_len = eturbo_get_pkt_len,
618 .read_data = eturbo_read_data,
619 },
620#endif
621
622#ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
623 [DEVTYPE_GUNZE] = {
624 .min_xc = 0x0,
625 .max_xc = 0x0fff,
626 .min_yc = 0x0,
627 .max_yc = 0x0fff,
628 .rept_size = 4,
629 .read_data = gunze_read_data,
630 },
631#endif
632
633#ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
634 [DEVTYPE_DMC_TSC10] = {
635 .min_xc = 0x0,
636 .max_xc = 0x03ff,
637 .min_yc = 0x0,
638 .max_yc = 0x03ff,
639 .rept_size = 5,
640 .init = dmc_tsc10_init,
641 .read_data = dmc_tsc10_read_data,
642 },
643#endif
644
645#ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
646 [DEVTYPE_IRTOUCH] = {
647 .min_xc = 0x0,
648 .max_xc = 0x0fff,
649 .min_yc = 0x0,
650 .max_yc = 0x0fff,
651 .rept_size = 8,
652 .read_data = irtouch_read_data,
653 },
654#endif
655
656#ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
657 [DEVTYPE_IDEALTEK] = {
658 .min_xc = 0x0,
659 .max_xc = 0x0fff,
660 .min_yc = 0x0,
661 .max_yc = 0x0fff,
662 .rept_size = 8,
663 .process_pkt = usbtouch_process_multi,
664 .get_pkt_len = idealtek_get_pkt_len,
665 .read_data = idealtek_read_data,
666 },
667#endif
668
669#ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
670 [DEVTYPE_GENERAL_TOUCH] = {
671 .min_xc = 0x0,
672 .max_xc = 0x0500,
673 .min_yc = 0x0,
674 .max_yc = 0x0500,
675 .rept_size = 7,
676 .read_data = general_touch_read_data,
677 },
678#endif
679
680#ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
681 [DEVTYPE_GOTOP] = {
682 .min_xc = 0x0,
683 .max_xc = 0x03ff,
684 .min_yc = 0x0,
685 .max_yc = 0x03ff,
686 .rept_size = 4,
687 .read_data = gotop_read_data,
688 },
689#endif
690};
691
692
693/*****************************************************************************
694 * Generic Part
695 */
696static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
697 unsigned char *pkt, int len)
698{
699 struct usbtouch_device_info *type = usbtouch->type;
700
701 if (!type->read_data(usbtouch, pkt))
702 return;
703
704 input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch);
705
706 if (swap_xy) {
707 input_report_abs(usbtouch->input, ABS_X, usbtouch->y);
708 input_report_abs(usbtouch->input, ABS_Y, usbtouch->x);
709 } else {
710 input_report_abs(usbtouch->input, ABS_X, usbtouch->x);
711 input_report_abs(usbtouch->input, ABS_Y, usbtouch->y);
712 }
713 if (type->max_press)
714 input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press);
715 input_sync(usbtouch->input);
716}
717
718
719#ifdef MULTI_PACKET
720static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
721 unsigned char *pkt, int len)
722{
723 unsigned char *buffer;
724 int pkt_len, pos, buf_len, tmp;
725
726 /* process buffer */
727 if (unlikely(usbtouch->buf_len)) {
728 /* try to get size */
729 pkt_len = usbtouch->type->get_pkt_len(
730 usbtouch->buffer, usbtouch->buf_len);
731
732 /* drop? */
733 if (unlikely(!pkt_len))
734 goto out_flush_buf;
735
736 /* need to append -pkt_len bytes before able to get size */
737 if (unlikely(pkt_len < 0)) {
738 int append = -pkt_len;
739 if (unlikely(append > len))
740 append = len;
741 if (usbtouch->buf_len + append >= usbtouch->type->rept_size)
742 goto out_flush_buf;
743 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append);
744 usbtouch->buf_len += append;
745
746 pkt_len = usbtouch->type->get_pkt_len(
747 usbtouch->buffer, usbtouch->buf_len);
748 if (pkt_len < 0)
749 return;
750 }
751
752 /* append */
753 tmp = pkt_len - usbtouch->buf_len;
754 if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size)
755 goto out_flush_buf;
756 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp);
757 usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len);
758
759 buffer = pkt + tmp;
760 buf_len = len - tmp;
761 } else {
762 buffer = pkt;
763 buf_len = len;
764 }
765
766 /* loop over the received packet, process */
767 pos = 0;
768 while (pos < buf_len) {
769 /* get packet len */
770 pkt_len = usbtouch->type->get_pkt_len(buffer + pos,
771 buf_len - pos);
772
773 /* unknown packet: skip one byte */
774 if (unlikely(!pkt_len)) {
775 pos++;
776 continue;
777 }
778
779 /* full packet: process */
780 if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) {
781 usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len);
782 } else {
783 /* incomplete packet: save in buffer */
784 memcpy(usbtouch->buffer, buffer + pos, buf_len - pos);
785 usbtouch->buf_len = buf_len - pos;
786 return;
787 }
788 pos += pkt_len;
789 }
790
791out_flush_buf:
792 usbtouch->buf_len = 0;
793 return;
794}
795#endif
796
797
798static void usbtouch_irq(struct urb *urb)
799{
800 struct usbtouch_usb *usbtouch = urb->context;
801 int retval;
802
803 switch (urb->status) {
804 case 0:
805 /* success */
806 break;
807 case -ETIME:
808 /* this urb is timing out */
809 dbg("%s - urb timed out - was the device unplugged?",
810 __func__);
811 return;
812 case -ECONNRESET:
813 case -ENOENT:
814 case -ESHUTDOWN:
815 /* this urb is terminated, clean up */
816 dbg("%s - urb shutting down with status: %d",
817 __func__, urb->status);
818 return;
819 default:
820 dbg("%s - nonzero urb status received: %d",
821 __func__, urb->status);
822 goto exit;
823 }
824
825 usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length);
826
827exit:
828 retval = usb_submit_urb(urb, GFP_ATOMIC);
829 if (retval)
830 err("%s - usb_submit_urb failed with result: %d",
831 __func__, retval);
832}
833
834static int usbtouch_open(struct input_dev *input)
835{
836 struct usbtouch_usb *usbtouch = input_get_drvdata(input);
837
838 usbtouch->irq->dev = usbtouch->udev;
839
840 if (usb_submit_urb(usbtouch->irq, GFP_KERNEL))
841 return -EIO;
842
843 return 0;
844}
845
846static void usbtouch_close(struct input_dev *input)
847{
848 struct usbtouch_usb *usbtouch = input_get_drvdata(input);
849
850 usb_kill_urb(usbtouch->irq);
851}
852
853
854static void usbtouch_free_buffers(struct usb_device *udev,
855 struct usbtouch_usb *usbtouch)
856{
857 usb_buffer_free(udev, usbtouch->type->rept_size,
858 usbtouch->data, usbtouch->data_dma);
859 kfree(usbtouch->buffer);
860}
861
862
863static int usbtouch_probe(struct usb_interface *intf,
864 const struct usb_device_id *id)
865{
866 struct usbtouch_usb *usbtouch;
867 struct input_dev *input_dev;
868 struct usb_host_interface *interface;
869 struct usb_endpoint_descriptor *endpoint;
870 struct usb_device *udev = interface_to_usbdev(intf);
871 struct usbtouch_device_info *type;
872 int err = -ENOMEM;
873
874 /* some devices are ignored */
875 if (id->driver_info == DEVTYPE_IGNORE)
876 return -ENODEV;
877
878 interface = intf->cur_altsetting;
879 endpoint = &interface->endpoint[0].desc;
880
881 usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL);
882 input_dev = input_allocate_device();
883 if (!usbtouch || !input_dev)
884 goto out_free;
885
886 type = &usbtouch_dev_info[id->driver_info];
887 usbtouch->type = type;
888 if (!type->process_pkt)
889 type->process_pkt = usbtouch_process_pkt;
890
891 usbtouch->data = usb_buffer_alloc(udev, type->rept_size,
892 GFP_KERNEL, &usbtouch->data_dma);
893 if (!usbtouch->data)
894 goto out_free;
895
896 if (type->get_pkt_len) {
897 usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL);
898 if (!usbtouch->buffer)
899 goto out_free_buffers;
900 }
901
902 usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
903 if (!usbtouch->irq) {
904 dbg("%s - usb_alloc_urb failed: usbtouch->irq", __func__);
905 goto out_free_buffers;
906 }
907
908 usbtouch->udev = udev;
909 usbtouch->input = input_dev;
910
911 if (udev->manufacturer)
912 strlcpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name));
913
914 if (udev->product) {
915 if (udev->manufacturer)
916 strlcat(usbtouch->name, " ", sizeof(usbtouch->name));
917 strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name));
918 }
919
920 if (!strlen(usbtouch->name))
921 snprintf(usbtouch->name, sizeof(usbtouch->name),
922 "USB Touchscreen %04x:%04x",
923 le16_to_cpu(udev->descriptor.idVendor),
924 le16_to_cpu(udev->descriptor.idProduct));
925
926 usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys));
927 strlcat(usbtouch->phys, "/input0", sizeof(usbtouch->phys));
928
929 input_dev->name = usbtouch->name;
930 input_dev->phys = usbtouch->phys;
931 usb_to_input_id(udev, &input_dev->id);
932 input_dev->dev.parent = &intf->dev;
933
934 input_set_drvdata(input_dev, usbtouch);
935
936 input_dev->open = usbtouch_open;
937 input_dev->close = usbtouch_close;
938
939 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
940 input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
941 input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0);
942 input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0);
943 if (type->max_press)
944 input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press,
945 type->max_press, 0, 0);
946
947 usb_fill_int_urb(usbtouch->irq, usbtouch->udev,
948 usb_rcvintpipe(usbtouch->udev, endpoint->bEndpointAddress),
949 usbtouch->data, type->rept_size,
950 usbtouch_irq, usbtouch, endpoint->bInterval);
951
952 usbtouch->irq->dev = usbtouch->udev;
953 usbtouch->irq->transfer_dma = usbtouch->data_dma;
954 usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
955
956 /* device specific init */
957 if (type->init) {
958 err = type->init(usbtouch);
959 if (err) {
960 dbg("%s - type->init() failed, err: %d", __func__, err);
961 goto out_free_buffers;
962 }
963 }
964
965 err = input_register_device(usbtouch->input);
966 if (err) {
967 dbg("%s - input_register_device failed, err: %d", __func__, err);
968 goto out_free_buffers;
969 }
970
971 usb_set_intfdata(intf, usbtouch);
972
973 return 0;
974
975out_free_buffers:
976 usbtouch_free_buffers(udev, usbtouch);
977out_free:
978 input_free_device(input_dev);
979 kfree(usbtouch);
980 return err;
981}
982
983static void usbtouch_disconnect(struct usb_interface *intf)
984{
985 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
986
987 dbg("%s - called", __func__);
988
989 if (!usbtouch)
990 return;
991
992 dbg("%s - usbtouch is initialized, cleaning up", __func__);
993 usb_set_intfdata(intf, NULL);
994 usb_kill_urb(usbtouch->irq);
995 input_unregister_device(usbtouch->input);
996 usb_free_urb(usbtouch->irq);
997 usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch);
998 kfree(usbtouch);
999}
1000
1001MODULE_DEVICE_TABLE(usb, usbtouch_devices);
1002
1003static struct usb_driver usbtouch_driver = {
1004 .name = "usbtouchscreen",
1005 .probe = usbtouch_probe,
1006 .disconnect = usbtouch_disconnect,
1007 .id_table = usbtouch_devices,
1008};
1009
1010static int __init usbtouch_init(void)
1011{
1012 return usb_register(&usbtouch_driver);
1013}
1014
1015static void __exit usbtouch_cleanup(void)
1016{
1017 usb_deregister(&usbtouch_driver);
1018}
1019
1020module_init(usbtouch_init);
1021module_exit(usbtouch_cleanup);
1022
1023MODULE_AUTHOR(DRIVER_AUTHOR);
1024MODULE_DESCRIPTION(DRIVER_DESC);
1025MODULE_LICENSE("GPL");
1026
1027MODULE_ALIAS("touchkitusb");
1028MODULE_ALIAS("itmtouch");
1029MODULE_ALIAS("mtouchusb");