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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[mirror_ubuntu-hirsute-kernel.git] / drivers / input / touchscreen / usbtouchscreen.c
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 * - GoTop Super_Q2/GogoPen/PenPower tablets
15 *
16 * Copyright (C) 2004-2007 by Daniel Ritz <daniel.ritz@gmx.ch>
17 * Copyright (C) by Todd E. Johnson (mtouchusb.c)
18 *
19 * This program is free software; you can redistribute it and/or
20 * modify it under the terms of the GNU General Public License as
21 * published by the Free Software Foundation; either version 2 of the
22 * License, or (at your option) any later version.
23 *
24 * This program is distributed in the hope that it will be useful, but
25 * WITHOUT ANY WARRANTY; without even the implied warranty of
26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
27 * General Public License for more details.
28 *
29 * You should have received a copy of the GNU General Public License
30 * along with this program; if not, write to the Free Software
31 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
32 *
33 * Driver is based on touchkitusb.c
34 * - ITM parts are from itmtouch.c
35 * - 3M parts are from mtouchusb.c
36 * - PanJit parts are from an unmerged driver by Lanslott Gish
37 * - DMC TSC 10/25 are from Holger Schurig, with ideas from an unmerged
38 * driver from Marius Vollmer
39 *
40 *****************************************************************************/
41
42 //#define DEBUG
43
44 #include <linux/kernel.h>
45 #include <linux/slab.h>
46 #include <linux/input.h>
47 #include <linux/module.h>
48 #include <linux/init.h>
49 #include <linux/usb.h>
50 #include <linux/usb/input.h>
51
52
53 #define DRIVER_VERSION "v0.5"
54 #define DRIVER_AUTHOR "Daniel Ritz <daniel.ritz@gmx.ch>"
55 #define DRIVER_DESC "USB Touchscreen Driver"
56
57 static int swap_xy;
58 module_param(swap_xy, bool, 0644);
59 MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");
60
61 /* device specifc data/functions */
62 struct usbtouch_usb;
63 struct usbtouch_device_info {
64 int min_xc, max_xc;
65 int min_yc, max_yc;
66 int min_press, max_press;
67 int rept_size;
68 int flags;
69
70 void (*process_pkt) (struct usbtouch_usb *usbtouch, unsigned char *pkt, int len);
71 int (*get_pkt_len) (unsigned char *pkt, int len);
72 int (*read_data) (struct usbtouch_usb *usbtouch, unsigned char *pkt);
73 int (*init) (struct usbtouch_usb *usbtouch);
74 };
75
76 #define USBTOUCH_FLG_BUFFER 0x01
77
78
79 /* a usbtouch device */
80 struct usbtouch_usb {
81 unsigned char *data;
82 dma_addr_t data_dma;
83 unsigned char *buffer;
84 int buf_len;
85 struct urb *irq;
86 struct usb_device *udev;
87 struct input_dev *input;
88 struct usbtouch_device_info *type;
89 char name[128];
90 char phys[64];
91
92 int x, y;
93 int touch, press;
94 };
95
96
97 #if defined(CONFIG_TOUCHSCREEN_USB_EGALAX) || defined(CONFIG_TOUCHSCREEN_USB_ETURBO) || defined(CONFIG_TOUCHSCREEN_USB_IDEALTEK)
98 #define MULTI_PACKET
99 #endif
100
101 #ifdef MULTI_PACKET
102 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
103 unsigned char *pkt, int len);
104 #endif
105
106 /* device types */
107 enum {
108 DEVTPYE_DUMMY = -1,
109 DEVTYPE_EGALAX,
110 DEVTYPE_PANJIT,
111 DEVTYPE_3M,
112 DEVTYPE_ITM,
113 DEVTYPE_ETURBO,
114 DEVTYPE_GUNZE,
115 DEVTYPE_DMC_TSC10,
116 DEVTYPE_IRTOUCH,
117 DEVTYPE_IDEALTEK,
118 DEVTYPE_GENERAL_TOUCH,
119 DEVTYPE_GOTOP,
120 };
121
122 static struct usb_device_id usbtouch_devices[] = {
123 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
124 {USB_DEVICE(0x3823, 0x0001), .driver_info = DEVTYPE_EGALAX},
125 {USB_DEVICE(0x3823, 0x0002), .driver_info = DEVTYPE_EGALAX},
126 {USB_DEVICE(0x0123, 0x0001), .driver_info = DEVTYPE_EGALAX},
127 {USB_DEVICE(0x0eef, 0x0001), .driver_info = DEVTYPE_EGALAX},
128 {USB_DEVICE(0x0eef, 0x0002), .driver_info = DEVTYPE_EGALAX},
129 {USB_DEVICE(0x1234, 0x0001), .driver_info = DEVTYPE_EGALAX},
130 {USB_DEVICE(0x1234, 0x0002), .driver_info = DEVTYPE_EGALAX},
131 #endif
132
133 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
134 {USB_DEVICE(0x134c, 0x0001), .driver_info = DEVTYPE_PANJIT},
135 {USB_DEVICE(0x134c, 0x0002), .driver_info = DEVTYPE_PANJIT},
136 {USB_DEVICE(0x134c, 0x0003), .driver_info = DEVTYPE_PANJIT},
137 {USB_DEVICE(0x134c, 0x0004), .driver_info = DEVTYPE_PANJIT},
138 #endif
139
140 #ifdef CONFIG_TOUCHSCREEN_USB_3M
141 {USB_DEVICE(0x0596, 0x0001), .driver_info = DEVTYPE_3M},
142 #endif
143
144 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
145 {USB_DEVICE(0x0403, 0xf9e9), .driver_info = DEVTYPE_ITM},
146 #endif
147
148 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
149 {USB_DEVICE(0x1234, 0x5678), .driver_info = DEVTYPE_ETURBO},
150 #endif
151
152 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
153 {USB_DEVICE(0x0637, 0x0001), .driver_info = DEVTYPE_GUNZE},
154 #endif
155
156 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
157 {USB_DEVICE(0x0afa, 0x03e8), .driver_info = DEVTYPE_DMC_TSC10},
158 #endif
159
160 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
161 {USB_DEVICE(0x595a, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
162 {USB_DEVICE(0x6615, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
163 #endif
164
165 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
166 {USB_DEVICE(0x1391, 0x1000), .driver_info = DEVTYPE_IDEALTEK},
167 #endif
168
169 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
170 {USB_DEVICE(0x0dfc, 0x0001), .driver_info = DEVTYPE_GENERAL_TOUCH},
171 #endif
172
173 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
174 {USB_DEVICE(0x08f2, 0x007f), .driver_info = DEVTYPE_GOTOP},
175 {USB_DEVICE(0x08f2, 0x00ce), .driver_info = DEVTYPE_GOTOP},
176 {USB_DEVICE(0x08f2, 0x00f4), .driver_info = DEVTYPE_GOTOP},
177 #endif
178
179 {}
180 };
181
182
183 /*****************************************************************************
184 * eGalax part
185 */
186
187 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
188
189 #define EGALAX_PKT_TYPE_MASK 0xFE
190 #define EGALAX_PKT_TYPE_REPT 0x80
191 #define EGALAX_PKT_TYPE_DIAG 0x0A
192
193 static int egalax_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
194 {
195 if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT)
196 return 0;
197
198 dev->x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F);
199 dev->y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F);
200 dev->touch = pkt[0] & 0x01;
201
202 return 1;
203 }
204
205 static int egalax_get_pkt_len(unsigned char *buf, int len)
206 {
207 switch (buf[0] & EGALAX_PKT_TYPE_MASK) {
208 case EGALAX_PKT_TYPE_REPT:
209 return 5;
210
211 case EGALAX_PKT_TYPE_DIAG:
212 if (len < 2)
213 return -1;
214
215 return buf[1] + 2;
216 }
217
218 return 0;
219 }
220 #endif
221
222
223 /*****************************************************************************
224 * PanJit Part
225 */
226 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
227 static int panjit_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
228 {
229 dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
230 dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
231 dev->touch = pkt[0] & 0x01;
232
233 return 1;
234 }
235 #endif
236
237
238 /*****************************************************************************
239 * 3M/Microtouch Part
240 */
241 #ifdef CONFIG_TOUCHSCREEN_USB_3M
242
243 #define MTOUCHUSB_ASYNC_REPORT 1
244 #define MTOUCHUSB_RESET 7
245 #define MTOUCHUSB_REQ_CTRLLR_ID 10
246
247 static int mtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
248 {
249 dev->x = (pkt[8] << 8) | pkt[7];
250 dev->y = (pkt[10] << 8) | pkt[9];
251 dev->touch = (pkt[2] & 0x40) ? 1 : 0;
252
253 return 1;
254 }
255
256 static int mtouch_init(struct usbtouch_usb *usbtouch)
257 {
258 int ret, i;
259
260 ret = usb_control_msg(usbtouch->udev, usb_rcvctrlpipe(usbtouch->udev, 0),
261 MTOUCHUSB_RESET,
262 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
263 1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
264 dbg("%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d",
265 __FUNCTION__, ret);
266 if (ret < 0)
267 return ret;
268 msleep(150);
269
270 for (i = 0; i < 3; i++) {
271 ret = usb_control_msg(usbtouch->udev, usb_rcvctrlpipe(usbtouch->udev, 0),
272 MTOUCHUSB_ASYNC_REPORT,
273 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
274 1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT);
275 dbg("%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d",
276 __FUNCTION__, ret);
277 if (ret >= 0)
278 break;
279 if (ret != -EPIPE)
280 return ret;
281 }
282
283 return 0;
284 }
285 #endif
286
287
288 /*****************************************************************************
289 * ITM Part
290 */
291 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
292 static int itm_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
293 {
294 int touch;
295 /*
296 * ITM devices report invalid x/y data if not touched.
297 * if the screen was touched before but is not touched any more
298 * report touch as 0 with the last valid x/y data once. then stop
299 * reporting data until touched again.
300 */
301 dev->press = ((pkt[2] & 0x01) << 7) | (pkt[5] & 0x7F);
302
303 touch = ~pkt[7] & 0x20;
304 if (!touch) {
305 if (dev->touch) {
306 dev->touch = 0;
307 return 1;
308 }
309
310 return 0;
311 }
312
313 dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F);
314 dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F);
315 dev->touch = touch;
316
317 return 1;
318 }
319 #endif
320
321
322 /*****************************************************************************
323 * eTurboTouch part
324 */
325 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
326 static int eturbo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
327 {
328 unsigned int shift;
329
330 /* packets should start with sync */
331 if (!(pkt[0] & 0x80))
332 return 0;
333
334 shift = (6 - (pkt[0] & 0x03));
335 dev->x = ((pkt[3] << 7) | pkt[4]) >> shift;
336 dev->y = ((pkt[1] << 7) | pkt[2]) >> shift;
337 dev->touch = (pkt[0] & 0x10) ? 1 : 0;
338
339 return 1;
340 }
341
342 static int eturbo_get_pkt_len(unsigned char *buf, int len)
343 {
344 if (buf[0] & 0x80)
345 return 5;
346 if (buf[0] == 0x01)
347 return 3;
348 return 0;
349 }
350 #endif
351
352
353 /*****************************************************************************
354 * Gunze part
355 */
356 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
357 static int gunze_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
358 {
359 if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80))
360 return 0;
361
362 dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F);
363 dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F);
364 dev->touch = pkt[0] & 0x20;
365
366 return 1;
367 }
368 #endif
369
370 /*****************************************************************************
371 * DMC TSC-10/25 Part
372 *
373 * Documentation about the controller and it's protocol can be found at
374 * http://www.dmccoltd.com/files/controler/tsc10usb_pi_e.pdf
375 * http://www.dmccoltd.com/files/controler/tsc25_usb_e.pdf
376 */
377 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
378
379 /* supported data rates. currently using 130 */
380 #define TSC10_RATE_POINT 0x50
381 #define TSC10_RATE_30 0x40
382 #define TSC10_RATE_50 0x41
383 #define TSC10_RATE_80 0x42
384 #define TSC10_RATE_100 0x43
385 #define TSC10_RATE_130 0x44
386 #define TSC10_RATE_150 0x45
387
388 /* commands */
389 #define TSC10_CMD_RESET 0x55
390 #define TSC10_CMD_RATE 0x05
391 #define TSC10_CMD_DATA1 0x01
392
393 static int dmc_tsc10_init(struct usbtouch_usb *usbtouch)
394 {
395 struct usb_device *dev = usbtouch->udev;
396 int ret;
397 unsigned char buf[2];
398
399 /* reset */
400 buf[0] = buf[1] = 0xFF;
401 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
402 TSC10_CMD_RESET,
403 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
404 0, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
405 if (ret < 0)
406 return ret;
407 if (buf[0] != 0x06 || buf[1] != 0x00)
408 return -ENODEV;
409
410 /* set coordinate output rate */
411 buf[0] = buf[1] = 0xFF;
412 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
413 TSC10_CMD_RATE,
414 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
415 TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
416 if (ret < 0)
417 return ret;
418 if ((buf[0] != 0x06 || buf[1] != 0x00) &&
419 (buf[0] != 0x15 || buf[1] != 0x01))
420 return -ENODEV;
421
422 /* start sending data */
423 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
424 TSC10_CMD_DATA1,
425 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
426 0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
427 if (ret < 0)
428 return ret;
429
430 return 0;
431 }
432
433
434 static int dmc_tsc10_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
435 {
436 dev->x = ((pkt[2] & 0x03) << 8) | pkt[1];
437 dev->y = ((pkt[4] & 0x03) << 8) | pkt[3];
438 dev->touch = pkt[0] & 0x01;
439
440 return 1;
441 }
442 #endif
443
444
445 /*****************************************************************************
446 * IRTOUCH Part
447 */
448 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
449 static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
450 {
451 dev->x = (pkt[3] << 8) | pkt[2];
452 dev->y = (pkt[5] << 8) | pkt[4];
453 dev->touch = (pkt[1] & 0x03) ? 1 : 0;
454
455 return 1;
456 }
457 #endif
458
459
460 /*****************************************************************************
461 * IdealTEK URTC1000 Part
462 */
463 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
464 static int idealtek_get_pkt_len(unsigned char *buf, int len)
465 {
466 if (buf[0] & 0x80)
467 return 5;
468 if (buf[0] == 0x01)
469 return len;
470 return 0;
471 }
472
473 static int idealtek_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
474 {
475 switch (pkt[0] & 0x98) {
476 case 0x88:
477 /* touch data in IdealTEK mode */
478 dev->x = (pkt[1] << 5) | (pkt[2] >> 2);
479 dev->y = (pkt[3] << 5) | (pkt[4] >> 2);
480 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
481 return 1;
482
483 case 0x98:
484 /* touch data in MT emulation mode */
485 dev->x = (pkt[2] << 5) | (pkt[1] >> 2);
486 dev->y = (pkt[4] << 5) | (pkt[3] >> 2);
487 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
488 return 1;
489
490 default:
491 return 0;
492 }
493 }
494 #endif
495
496 /*****************************************************************************
497 * General Touch Part
498 */
499 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
500 static int general_touch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
501 {
502 dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1] ;
503 dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3] ;
504 dev->press = pkt[5] & 0xff;
505 dev->touch = pkt[0] & 0x01;
506
507 return 1;
508 }
509 #endif
510
511 /*****************************************************************************
512 * GoTop Part
513 */
514 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
515 static int gotop_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
516 {
517 dev->x = ((pkt[1] & 0x38) << 4) | pkt[2];
518 dev->y = ((pkt[1] & 0x07) << 7) | pkt[3];
519 dev->touch = pkt[0] & 0x01;
520 return 1;
521 }
522 #endif
523
524
525 /*****************************************************************************
526 * the different device descriptors
527 */
528 static struct usbtouch_device_info usbtouch_dev_info[] = {
529 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
530 [DEVTYPE_EGALAX] = {
531 .min_xc = 0x0,
532 .max_xc = 0x07ff,
533 .min_yc = 0x0,
534 .max_yc = 0x07ff,
535 .rept_size = 16,
536 .flags = USBTOUCH_FLG_BUFFER,
537 .process_pkt = usbtouch_process_multi,
538 .get_pkt_len = egalax_get_pkt_len,
539 .read_data = egalax_read_data,
540 },
541 #endif
542
543 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
544 [DEVTYPE_PANJIT] = {
545 .min_xc = 0x0,
546 .max_xc = 0x0fff,
547 .min_yc = 0x0,
548 .max_yc = 0x0fff,
549 .rept_size = 8,
550 .read_data = panjit_read_data,
551 },
552 #endif
553
554 #ifdef CONFIG_TOUCHSCREEN_USB_3M
555 [DEVTYPE_3M] = {
556 .min_xc = 0x0,
557 .max_xc = 0x4000,
558 .min_yc = 0x0,
559 .max_yc = 0x4000,
560 .rept_size = 11,
561 .read_data = mtouch_read_data,
562 .init = mtouch_init,
563 },
564 #endif
565
566 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
567 [DEVTYPE_ITM] = {
568 .min_xc = 0x0,
569 .max_xc = 0x0fff,
570 .min_yc = 0x0,
571 .max_yc = 0x0fff,
572 .max_press = 0xff,
573 .rept_size = 8,
574 .read_data = itm_read_data,
575 },
576 #endif
577
578 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
579 [DEVTYPE_ETURBO] = {
580 .min_xc = 0x0,
581 .max_xc = 0x07ff,
582 .min_yc = 0x0,
583 .max_yc = 0x07ff,
584 .rept_size = 8,
585 .flags = USBTOUCH_FLG_BUFFER,
586 .process_pkt = usbtouch_process_multi,
587 .get_pkt_len = eturbo_get_pkt_len,
588 .read_data = eturbo_read_data,
589 },
590 #endif
591
592 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
593 [DEVTYPE_GUNZE] = {
594 .min_xc = 0x0,
595 .max_xc = 0x0fff,
596 .min_yc = 0x0,
597 .max_yc = 0x0fff,
598 .rept_size = 4,
599 .read_data = gunze_read_data,
600 },
601 #endif
602
603 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
604 [DEVTYPE_DMC_TSC10] = {
605 .min_xc = 0x0,
606 .max_xc = 0x03ff,
607 .min_yc = 0x0,
608 .max_yc = 0x03ff,
609 .rept_size = 5,
610 .init = dmc_tsc10_init,
611 .read_data = dmc_tsc10_read_data,
612 },
613 #endif
614
615 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
616 [DEVTYPE_IRTOUCH] = {
617 .min_xc = 0x0,
618 .max_xc = 0x0fff,
619 .min_yc = 0x0,
620 .max_yc = 0x0fff,
621 .rept_size = 8,
622 .read_data = irtouch_read_data,
623 },
624 #endif
625
626 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
627 [DEVTYPE_IDEALTEK] = {
628 .min_xc = 0x0,
629 .max_xc = 0x0fff,
630 .min_yc = 0x0,
631 .max_yc = 0x0fff,
632 .rept_size = 8,
633 .flags = USBTOUCH_FLG_BUFFER,
634 .process_pkt = usbtouch_process_multi,
635 .get_pkt_len = idealtek_get_pkt_len,
636 .read_data = idealtek_read_data,
637 },
638 #endif
639
640 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
641 [DEVTYPE_GENERAL_TOUCH] = {
642 .min_xc = 0x0,
643 .max_xc = 0x0500,
644 .min_yc = 0x0,
645 .max_yc = 0x0500,
646 .rept_size = 7,
647 .read_data = general_touch_read_data,
648 },
649 #endif
650
651 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
652 [DEVTYPE_GOTOP] = {
653 .min_xc = 0x0,
654 .max_xc = 0x03ff,
655 .min_yc = 0x0,
656 .max_yc = 0x03ff,
657 .rept_size = 4,
658 .read_data = gotop_read_data,
659 },
660 #endif
661 };
662
663
664 /*****************************************************************************
665 * Generic Part
666 */
667 static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
668 unsigned char *pkt, int len)
669 {
670 struct usbtouch_device_info *type = usbtouch->type;
671
672 if (!type->read_data(usbtouch, pkt))
673 return;
674
675 input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch);
676
677 if (swap_xy) {
678 input_report_abs(usbtouch->input, ABS_X, usbtouch->y);
679 input_report_abs(usbtouch->input, ABS_Y, usbtouch->x);
680 } else {
681 input_report_abs(usbtouch->input, ABS_X, usbtouch->x);
682 input_report_abs(usbtouch->input, ABS_Y, usbtouch->y);
683 }
684 if (type->max_press)
685 input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press);
686 input_sync(usbtouch->input);
687 }
688
689
690 #ifdef MULTI_PACKET
691 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
692 unsigned char *pkt, int len)
693 {
694 unsigned char *buffer;
695 int pkt_len, pos, buf_len, tmp;
696
697 /* process buffer */
698 if (unlikely(usbtouch->buf_len)) {
699 /* try to get size */
700 pkt_len = usbtouch->type->get_pkt_len(
701 usbtouch->buffer, usbtouch->buf_len);
702
703 /* drop? */
704 if (unlikely(!pkt_len))
705 goto out_flush_buf;
706
707 /* need to append -pkt_len bytes before able to get size */
708 if (unlikely(pkt_len < 0)) {
709 int append = -pkt_len;
710 if (unlikely(append > len))
711 append = len;
712 if (usbtouch->buf_len + append >= usbtouch->type->rept_size)
713 goto out_flush_buf;
714 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append);
715 usbtouch->buf_len += append;
716
717 pkt_len = usbtouch->type->get_pkt_len(
718 usbtouch->buffer, usbtouch->buf_len);
719 if (pkt_len < 0)
720 return;
721 }
722
723 /* append */
724 tmp = pkt_len - usbtouch->buf_len;
725 if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size)
726 goto out_flush_buf;
727 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp);
728 usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len);
729
730 buffer = pkt + tmp;
731 buf_len = len - tmp;
732 } else {
733 buffer = pkt;
734 buf_len = len;
735 }
736
737 /* loop over the received packet, process */
738 pos = 0;
739 while (pos < buf_len) {
740 /* get packet len */
741 pkt_len = usbtouch->type->get_pkt_len(buffer + pos, len);
742
743 /* unknown packet: drop everything */
744 if (unlikely(!pkt_len))
745 goto out_flush_buf;
746
747 /* full packet: process */
748 if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) {
749 usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len);
750 } else {
751 /* incomplete packet: save in buffer */
752 memcpy(usbtouch->buffer, buffer + pos, buf_len - pos);
753 usbtouch->buf_len = buf_len - pos;
754 return;
755 }
756 pos += pkt_len;
757 }
758
759 out_flush_buf:
760 usbtouch->buf_len = 0;
761 return;
762 }
763 #endif
764
765
766 static void usbtouch_irq(struct urb *urb)
767 {
768 struct usbtouch_usb *usbtouch = urb->context;
769 int retval;
770
771 switch (urb->status) {
772 case 0:
773 /* success */
774 break;
775 case -ETIME:
776 /* this urb is timing out */
777 dbg("%s - urb timed out - was the device unplugged?",
778 __FUNCTION__);
779 return;
780 case -ECONNRESET:
781 case -ENOENT:
782 case -ESHUTDOWN:
783 /* this urb is terminated, clean up */
784 dbg("%s - urb shutting down with status: %d",
785 __FUNCTION__, urb->status);
786 return;
787 default:
788 dbg("%s - nonzero urb status received: %d",
789 __FUNCTION__, urb->status);
790 goto exit;
791 }
792
793 usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length);
794
795 exit:
796 retval = usb_submit_urb(urb, GFP_ATOMIC);
797 if (retval)
798 err("%s - usb_submit_urb failed with result: %d",
799 __FUNCTION__, retval);
800 }
801
802 static int usbtouch_open(struct input_dev *input)
803 {
804 struct usbtouch_usb *usbtouch = input_get_drvdata(input);
805
806 usbtouch->irq->dev = usbtouch->udev;
807
808 if (usb_submit_urb(usbtouch->irq, GFP_KERNEL))
809 return -EIO;
810
811 return 0;
812 }
813
814 static void usbtouch_close(struct input_dev *input)
815 {
816 struct usbtouch_usb *usbtouch = input_get_drvdata(input);
817
818 usb_kill_urb(usbtouch->irq);
819 }
820
821
822 static void usbtouch_free_buffers(struct usb_device *udev,
823 struct usbtouch_usb *usbtouch)
824 {
825 usb_buffer_free(udev, usbtouch->type->rept_size,
826 usbtouch->data, usbtouch->data_dma);
827 kfree(usbtouch->buffer);
828 }
829
830
831 static int usbtouch_probe(struct usb_interface *intf,
832 const struct usb_device_id *id)
833 {
834 struct usbtouch_usb *usbtouch;
835 struct input_dev *input_dev;
836 struct usb_host_interface *interface;
837 struct usb_endpoint_descriptor *endpoint;
838 struct usb_device *udev = interface_to_usbdev(intf);
839 struct usbtouch_device_info *type;
840 int err = -ENOMEM;
841
842 interface = intf->cur_altsetting;
843 endpoint = &interface->endpoint[0].desc;
844
845 usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL);
846 input_dev = input_allocate_device();
847 if (!usbtouch || !input_dev)
848 goto out_free;
849
850 type = &usbtouch_dev_info[id->driver_info];
851 usbtouch->type = type;
852 if (!type->process_pkt)
853 type->process_pkt = usbtouch_process_pkt;
854
855 usbtouch->data = usb_buffer_alloc(udev, type->rept_size,
856 GFP_KERNEL, &usbtouch->data_dma);
857 if (!usbtouch->data)
858 goto out_free;
859
860 if (type->flags & USBTOUCH_FLG_BUFFER) {
861 usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL);
862 if (!usbtouch->buffer)
863 goto out_free_buffers;
864 }
865
866 usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
867 if (!usbtouch->irq) {
868 dbg("%s - usb_alloc_urb failed: usbtouch->irq", __FUNCTION__);
869 goto out_free_buffers;
870 }
871
872 usbtouch->udev = udev;
873 usbtouch->input = input_dev;
874
875 if (udev->manufacturer)
876 strlcpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name));
877
878 if (udev->product) {
879 if (udev->manufacturer)
880 strlcat(usbtouch->name, " ", sizeof(usbtouch->name));
881 strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name));
882 }
883
884 if (!strlen(usbtouch->name))
885 snprintf(usbtouch->name, sizeof(usbtouch->name),
886 "USB Touchscreen %04x:%04x",
887 le16_to_cpu(udev->descriptor.idVendor),
888 le16_to_cpu(udev->descriptor.idProduct));
889
890 usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys));
891 strlcat(usbtouch->phys, "/input0", sizeof(usbtouch->phys));
892
893 input_dev->name = usbtouch->name;
894 input_dev->phys = usbtouch->phys;
895 usb_to_input_id(udev, &input_dev->id);
896 input_dev->dev.parent = &intf->dev;
897
898 input_set_drvdata(input_dev, usbtouch);
899
900 input_dev->open = usbtouch_open;
901 input_dev->close = usbtouch_close;
902
903 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
904 input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
905 input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0);
906 input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0);
907 if (type->max_press)
908 input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press,
909 type->max_press, 0, 0);
910
911 usb_fill_int_urb(usbtouch->irq, usbtouch->udev,
912 usb_rcvintpipe(usbtouch->udev, endpoint->bEndpointAddress),
913 usbtouch->data, type->rept_size,
914 usbtouch_irq, usbtouch, endpoint->bInterval);
915
916 usbtouch->irq->dev = usbtouch->udev;
917 usbtouch->irq->transfer_dma = usbtouch->data_dma;
918 usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
919
920 /* device specific init */
921 if (type->init) {
922 err = type->init(usbtouch);
923 if (err) {
924 dbg("%s - type->init() failed, err: %d", __FUNCTION__, err);
925 goto out_free_buffers;
926 }
927 }
928
929 err = input_register_device(usbtouch->input);
930 if (err) {
931 dbg("%s - input_register_device failed, err: %d", __FUNCTION__, err);
932 goto out_free_buffers;
933 }
934
935 usb_set_intfdata(intf, usbtouch);
936
937 return 0;
938
939 out_free_buffers:
940 usbtouch_free_buffers(udev, usbtouch);
941 out_free:
942 input_free_device(input_dev);
943 kfree(usbtouch);
944 return err;
945 }
946
947 static void usbtouch_disconnect(struct usb_interface *intf)
948 {
949 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
950
951 dbg("%s - called", __FUNCTION__);
952
953 if (!usbtouch)
954 return;
955
956 dbg("%s - usbtouch is initialized, cleaning up", __FUNCTION__);
957 usb_set_intfdata(intf, NULL);
958 usb_kill_urb(usbtouch->irq);
959 input_unregister_device(usbtouch->input);
960 usb_free_urb(usbtouch->irq);
961 usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch);
962 kfree(usbtouch);
963 }
964
965 MODULE_DEVICE_TABLE(usb, usbtouch_devices);
966
967 static struct usb_driver usbtouch_driver = {
968 .name = "usbtouchscreen",
969 .probe = usbtouch_probe,
970 .disconnect = usbtouch_disconnect,
971 .id_table = usbtouch_devices,
972 };
973
974 static int __init usbtouch_init(void)
975 {
976 return usb_register(&usbtouch_driver);
977 }
978
979 static void __exit usbtouch_cleanup(void)
980 {
981 usb_deregister(&usbtouch_driver);
982 }
983
984 module_init(usbtouch_init);
985 module_exit(usbtouch_cleanup);
986
987 MODULE_AUTHOR(DRIVER_AUTHOR);
988 MODULE_DESCRIPTION(DRIVER_DESC);
989 MODULE_LICENSE("GPL");
990
991 MODULE_ALIAS("touchkitusb");
992 MODULE_ALIAS("itmtouch");
993 MODULE_ALIAS("mtouchusb");
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