Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6
[linux-2.6] / 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  *  - 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
53
54 #define DRIVER_VERSION          "v0.6"
55 #define DRIVER_AUTHOR           "Daniel Ritz <daniel.ritz@gmx.ch>"
56 #define DRIVER_DESC             "USB Touchscreen Driver"
57
58 static int swap_xy;
59 module_param(swap_xy, bool, 0644);
60 MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");
61
62 /* device specifc data/functions */
63 struct usbtouch_usb;
64 struct usbtouch_device_info {
65         int min_xc, max_xc;
66         int min_yc, max_yc;
67         int min_press, max_press;
68         int rept_size;
69
70         void (*process_pkt) (struct usbtouch_usb *usbtouch, unsigned char *pkt, int len);
71
72         /*
73          * used to get the packet len. possible return values:
74          * > 0: packet len
75          * = 0: skip one byte
76          * < 0: -return value more bytes needed
77          */
78         int  (*get_pkt_len) (unsigned char *pkt, int len);
79
80         int  (*read_data)   (struct usbtouch_usb *usbtouch, unsigned char *pkt);
81         int  (*init)        (struct usbtouch_usb *usbtouch);
82 };
83
84 /* a usbtouch device */
85 struct usbtouch_usb {
86         unsigned char *data;
87         dma_addr_t data_dma;
88         unsigned char *buffer;
89         int buf_len;
90         struct urb *irq;
91         struct usb_device *udev;
92         struct input_dev *input;
93         struct usbtouch_device_info *type;
94         char name[128];
95         char phys[64];
96
97         int x, y;
98         int touch, press;
99 };
100
101
102 /* device types */
103 enum {
104         DEVTPYE_DUMMY = -1,
105         DEVTYPE_EGALAX,
106         DEVTYPE_PANJIT,
107         DEVTYPE_3M,
108         DEVTYPE_ITM,
109         DEVTYPE_ETURBO,
110         DEVTYPE_GUNZE,
111         DEVTYPE_DMC_TSC10,
112         DEVTYPE_IRTOUCH,
113         DEVTYPE_IDEALTEK,
114         DEVTYPE_GENERAL_TOUCH,
115         DEVTYPE_GOTOP,
116 };
117
118 static struct usb_device_id usbtouch_devices[] = {
119 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
120         {USB_DEVICE(0x3823, 0x0001), .driver_info = DEVTYPE_EGALAX},
121         {USB_DEVICE(0x3823, 0x0002), .driver_info = DEVTYPE_EGALAX},
122         {USB_DEVICE(0x0123, 0x0001), .driver_info = DEVTYPE_EGALAX},
123         {USB_DEVICE(0x0eef, 0x0001), .driver_info = DEVTYPE_EGALAX},
124         {USB_DEVICE(0x0eef, 0x0002), .driver_info = DEVTYPE_EGALAX},
125         {USB_DEVICE(0x1234, 0x0001), .driver_info = DEVTYPE_EGALAX},
126         {USB_DEVICE(0x1234, 0x0002), .driver_info = DEVTYPE_EGALAX},
127 #endif
128
129 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
130         {USB_DEVICE(0x134c, 0x0001), .driver_info = DEVTYPE_PANJIT},
131         {USB_DEVICE(0x134c, 0x0002), .driver_info = DEVTYPE_PANJIT},
132         {USB_DEVICE(0x134c, 0x0003), .driver_info = DEVTYPE_PANJIT},
133         {USB_DEVICE(0x134c, 0x0004), .driver_info = DEVTYPE_PANJIT},
134 #endif
135
136 #ifdef CONFIG_TOUCHSCREEN_USB_3M
137         {USB_DEVICE(0x0596, 0x0001), .driver_info = DEVTYPE_3M},
138 #endif
139
140 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
141         {USB_DEVICE(0x0403, 0xf9e9), .driver_info = DEVTYPE_ITM},
142 #endif
143
144 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
145         {USB_DEVICE(0x1234, 0x5678), .driver_info = DEVTYPE_ETURBO},
146 #endif
147
148 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
149         {USB_DEVICE(0x0637, 0x0001), .driver_info = DEVTYPE_GUNZE},
150 #endif
151
152 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
153         {USB_DEVICE(0x0afa, 0x03e8), .driver_info = DEVTYPE_DMC_TSC10},
154 #endif
155
156 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
157         {USB_DEVICE(0x595a, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
158         {USB_DEVICE(0x6615, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
159 #endif
160
161 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
162         {USB_DEVICE(0x1391, 0x1000), .driver_info = DEVTYPE_IDEALTEK},
163 #endif
164
165 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
166         {USB_DEVICE(0x0dfc, 0x0001), .driver_info = DEVTYPE_GENERAL_TOUCH},
167 #endif
168
169 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
170         {USB_DEVICE(0x08f2, 0x007f), .driver_info = DEVTYPE_GOTOP},
171         {USB_DEVICE(0x08f2, 0x00ce), .driver_info = DEVTYPE_GOTOP},
172         {USB_DEVICE(0x08f2, 0x00f4), .driver_info = DEVTYPE_GOTOP},
173 #endif
174
175         {}
176 };
177
178
179 /*****************************************************************************
180  * eGalax part
181  */
182
183 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
184
185 #ifndef MULTI_PACKET
186 #define MULTI_PACKET
187 #endif
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 #ifndef MULTI_PACKET
327 #define MULTI_PACKET
328 #endif
329 static int eturbo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
330 {
331         unsigned int shift;
332
333         /* packets should start with sync */
334         if (!(pkt[0] & 0x80))
335                 return 0;
336
337         shift = (6 - (pkt[0] & 0x03));
338         dev->x = ((pkt[3] << 7) | pkt[4]) >> shift;
339         dev->y = ((pkt[1] << 7) | pkt[2]) >> shift;
340         dev->touch = (pkt[0] & 0x10) ? 1 : 0;
341
342         return 1;
343 }
344
345 static int eturbo_get_pkt_len(unsigned char *buf, int len)
346 {
347         if (buf[0] & 0x80)
348                 return 5;
349         if (buf[0] == 0x01)
350                 return 3;
351         return 0;
352 }
353 #endif
354
355
356 /*****************************************************************************
357  * Gunze part
358  */
359 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
360 static int gunze_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
361 {
362         if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80))
363                 return 0;
364
365         dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F);
366         dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F);
367         dev->touch = pkt[0] & 0x20;
368
369         return 1;
370 }
371 #endif
372
373 /*****************************************************************************
374  * DMC TSC-10/25 Part
375  *
376  * Documentation about the controller and it's protocol can be found at
377  *   http://www.dmccoltd.com/files/controler/tsc10usb_pi_e.pdf
378  *   http://www.dmccoltd.com/files/controler/tsc25_usb_e.pdf
379  */
380 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
381
382 /* supported data rates. currently using 130 */
383 #define TSC10_RATE_POINT        0x50
384 #define TSC10_RATE_30           0x40
385 #define TSC10_RATE_50           0x41
386 #define TSC10_RATE_80           0x42
387 #define TSC10_RATE_100          0x43
388 #define TSC10_RATE_130          0x44
389 #define TSC10_RATE_150          0x45
390
391 /* commands */
392 #define TSC10_CMD_RESET         0x55
393 #define TSC10_CMD_RATE          0x05
394 #define TSC10_CMD_DATA1         0x01
395
396 static int dmc_tsc10_init(struct usbtouch_usb *usbtouch)
397 {
398         struct usb_device *dev = usbtouch->udev;
399         int ret;
400         unsigned char buf[2];
401
402         /* reset */
403         buf[0] = buf[1] = 0xFF;
404         ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
405                               TSC10_CMD_RESET,
406                               USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
407                               0, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
408         if (ret < 0)
409                 return ret;
410         if (buf[0] != 0x06 || buf[1] != 0x00)
411                 return -ENODEV;
412
413         /* set coordinate output rate */
414         buf[0] = buf[1] = 0xFF;
415         ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
416                               TSC10_CMD_RATE,
417                               USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
418                               TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
419         if (ret < 0)
420                 return ret;
421         if ((buf[0] != 0x06 || buf[1] != 0x00) &&
422             (buf[0] != 0x15 || buf[1] != 0x01))
423                 return -ENODEV;
424
425         /* start sending data */
426         ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
427                               TSC10_CMD_DATA1,
428                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
429                               0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
430         if (ret < 0)
431                 return ret;
432
433         return 0;
434 }
435
436
437 static int dmc_tsc10_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
438 {
439         dev->x = ((pkt[2] & 0x03) << 8) | pkt[1];
440         dev->y = ((pkt[4] & 0x03) << 8) | pkt[3];
441         dev->touch = pkt[0] & 0x01;
442
443         return 1;
444 }
445 #endif
446
447
448 /*****************************************************************************
449  * IRTOUCH Part
450  */
451 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
452 static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
453 {
454         dev->x = (pkt[3] << 8) | pkt[2];
455         dev->y = (pkt[5] << 8) | pkt[4];
456         dev->touch = (pkt[1] & 0x03) ? 1 : 0;
457
458         return 1;
459 }
460 #endif
461
462
463 /*****************************************************************************
464  * IdealTEK URTC1000 Part
465  */
466 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
467 #ifndef MULTI_PACKET
468 #define MULTI_PACKET
469 #endif
470 static int idealtek_get_pkt_len(unsigned char *buf, int len)
471 {
472         if (buf[0] & 0x80)
473                 return 5;
474         if (buf[0] == 0x01)
475                 return len;
476         return 0;
477 }
478
479 static int idealtek_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
480 {
481         switch (pkt[0] & 0x98) {
482         case 0x88:
483                 /* touch data in IdealTEK mode */
484                 dev->x = (pkt[1] << 5) | (pkt[2] >> 2);
485                 dev->y = (pkt[3] << 5) | (pkt[4] >> 2);
486                 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
487                 return 1;
488
489         case 0x98:
490                 /* touch data in MT emulation mode */
491                 dev->x = (pkt[2] << 5) | (pkt[1] >> 2);
492                 dev->y = (pkt[4] << 5) | (pkt[3] >> 2);
493                 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
494                 return 1;
495
496         default:
497                 return 0;
498         }
499 }
500 #endif
501
502 /*****************************************************************************
503  * General Touch Part
504  */
505 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
506 static int general_touch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
507 {
508         dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1] ;
509         dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3] ;
510         dev->press = pkt[5] & 0xff;
511         dev->touch = pkt[0] & 0x01;
512
513         return 1;
514 }
515 #endif
516
517 /*****************************************************************************
518  * GoTop Part
519  */
520 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
521 static int gotop_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
522 {
523         dev->x = ((pkt[1] & 0x38) << 4) | pkt[2];
524         dev->y = ((pkt[1] & 0x07) << 7) | pkt[3];
525         dev->touch = pkt[0] & 0x01;
526         return 1;
527 }
528 #endif
529
530
531 /*****************************************************************************
532  * the different device descriptors
533  */
534 #ifdef MULTI_PACKET
535 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
536                                    unsigned char *pkt, int len);
537 #endif
538
539 static struct usbtouch_device_info usbtouch_dev_info[] = {
540 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
541         [DEVTYPE_EGALAX] = {
542                 .min_xc         = 0x0,
543                 .max_xc         = 0x07ff,
544                 .min_yc         = 0x0,
545                 .max_yc         = 0x07ff,
546                 .rept_size      = 16,
547                 .process_pkt    = usbtouch_process_multi,
548                 .get_pkt_len    = egalax_get_pkt_len,
549                 .read_data      = egalax_read_data,
550         },
551 #endif
552
553 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
554         [DEVTYPE_PANJIT] = {
555                 .min_xc         = 0x0,
556                 .max_xc         = 0x0fff,
557                 .min_yc         = 0x0,
558                 .max_yc         = 0x0fff,
559                 .rept_size      = 8,
560                 .read_data      = panjit_read_data,
561         },
562 #endif
563
564 #ifdef CONFIG_TOUCHSCREEN_USB_3M
565         [DEVTYPE_3M] = {
566                 .min_xc         = 0x0,
567                 .max_xc         = 0x4000,
568                 .min_yc         = 0x0,
569                 .max_yc         = 0x4000,
570                 .rept_size      = 11,
571                 .read_data      = mtouch_read_data,
572                 .init           = mtouch_init,
573         },
574 #endif
575
576 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
577         [DEVTYPE_ITM] = {
578                 .min_xc         = 0x0,
579                 .max_xc         = 0x0fff,
580                 .min_yc         = 0x0,
581                 .max_yc         = 0x0fff,
582                 .max_press      = 0xff,
583                 .rept_size      = 8,
584                 .read_data      = itm_read_data,
585         },
586 #endif
587
588 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
589         [DEVTYPE_ETURBO] = {
590                 .min_xc         = 0x0,
591                 .max_xc         = 0x07ff,
592                 .min_yc         = 0x0,
593                 .max_yc         = 0x07ff,
594                 .rept_size      = 8,
595                 .process_pkt    = usbtouch_process_multi,
596                 .get_pkt_len    = eturbo_get_pkt_len,
597                 .read_data      = eturbo_read_data,
598         },
599 #endif
600
601 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
602         [DEVTYPE_GUNZE] = {
603                 .min_xc         = 0x0,
604                 .max_xc         = 0x0fff,
605                 .min_yc         = 0x0,
606                 .max_yc         = 0x0fff,
607                 .rept_size      = 4,
608                 .read_data      = gunze_read_data,
609         },
610 #endif
611
612 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
613         [DEVTYPE_DMC_TSC10] = {
614                 .min_xc         = 0x0,
615                 .max_xc         = 0x03ff,
616                 .min_yc         = 0x0,
617                 .max_yc         = 0x03ff,
618                 .rept_size      = 5,
619                 .init           = dmc_tsc10_init,
620                 .read_data      = dmc_tsc10_read_data,
621         },
622 #endif
623
624 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
625         [DEVTYPE_IRTOUCH] = {
626                 .min_xc         = 0x0,
627                 .max_xc         = 0x0fff,
628                 .min_yc         = 0x0,
629                 .max_yc         = 0x0fff,
630                 .rept_size      = 8,
631                 .read_data      = irtouch_read_data,
632         },
633 #endif
634
635 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
636         [DEVTYPE_IDEALTEK] = {
637                 .min_xc         = 0x0,
638                 .max_xc         = 0x0fff,
639                 .min_yc         = 0x0,
640                 .max_yc         = 0x0fff,
641                 .rept_size      = 8,
642                 .process_pkt    = usbtouch_process_multi,
643                 .get_pkt_len    = idealtek_get_pkt_len,
644                 .read_data      = idealtek_read_data,
645         },
646 #endif
647
648 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
649         [DEVTYPE_GENERAL_TOUCH] = {
650                 .min_xc         = 0x0,
651                 .max_xc         = 0x0500,
652                 .min_yc         = 0x0,
653                 .max_yc         = 0x0500,
654                 .rept_size      = 7,
655                 .read_data      = general_touch_read_data,
656         },
657 #endif
658
659 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
660         [DEVTYPE_GOTOP] = {
661                 .min_xc         = 0x0,
662                 .max_xc         = 0x03ff,
663                 .min_yc         = 0x0,
664                 .max_yc         = 0x03ff,
665                 .rept_size      = 4,
666                 .read_data      = gotop_read_data,
667         },
668 #endif
669 };
670
671
672 /*****************************************************************************
673  * Generic Part
674  */
675 static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
676                                  unsigned char *pkt, int len)
677 {
678         struct usbtouch_device_info *type = usbtouch->type;
679
680         if (!type->read_data(usbtouch, pkt))
681                         return;
682
683         input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch);
684
685         if (swap_xy) {
686                 input_report_abs(usbtouch->input, ABS_X, usbtouch->y);
687                 input_report_abs(usbtouch->input, ABS_Y, usbtouch->x);
688         } else {
689                 input_report_abs(usbtouch->input, ABS_X, usbtouch->x);
690                 input_report_abs(usbtouch->input, ABS_Y, usbtouch->y);
691         }
692         if (type->max_press)
693                 input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press);
694         input_sync(usbtouch->input);
695 }
696
697
698 #ifdef MULTI_PACKET
699 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
700                                    unsigned char *pkt, int len)
701 {
702         unsigned char *buffer;
703         int pkt_len, pos, buf_len, tmp;
704
705         /* process buffer */
706         if (unlikely(usbtouch->buf_len)) {
707                 /* try to get size */
708                 pkt_len = usbtouch->type->get_pkt_len(
709                                 usbtouch->buffer, usbtouch->buf_len);
710
711                 /* drop? */
712                 if (unlikely(!pkt_len))
713                         goto out_flush_buf;
714
715                 /* need to append -pkt_len bytes before able to get size */
716                 if (unlikely(pkt_len < 0)) {
717                         int append = -pkt_len;
718                         if (unlikely(append > len))
719                                append = len;
720                         if (usbtouch->buf_len + append >= usbtouch->type->rept_size)
721                                 goto out_flush_buf;
722                         memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append);
723                         usbtouch->buf_len += append;
724
725                         pkt_len = usbtouch->type->get_pkt_len(
726                                         usbtouch->buffer, usbtouch->buf_len);
727                         if (pkt_len < 0)
728                                 return;
729                 }
730
731                 /* append */
732                 tmp = pkt_len - usbtouch->buf_len;
733                 if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size)
734                         goto out_flush_buf;
735                 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp);
736                 usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len);
737
738                 buffer = pkt + tmp;
739                 buf_len = len - tmp;
740         } else {
741                 buffer = pkt;
742                 buf_len = len;
743         }
744
745         /* loop over the received packet, process */
746         pos = 0;
747         while (pos < buf_len) {
748                 /* get packet len */
749                 pkt_len = usbtouch->type->get_pkt_len(buffer + pos,
750                                                         buf_len - pos);
751
752                 /* unknown packet: skip one byte */
753                 if (unlikely(!pkt_len)) {
754                         pos++;
755                         continue;
756                 }
757
758                 /* full packet: process */
759                 if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) {
760                         usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len);
761                 } else {
762                         /* incomplete packet: save in buffer */
763                         memcpy(usbtouch->buffer, buffer + pos, buf_len - pos);
764                         usbtouch->buf_len = buf_len - pos;
765                         return;
766                 }
767                 pos += pkt_len;
768         }
769
770 out_flush_buf:
771         usbtouch->buf_len = 0;
772         return;
773 }
774 #endif
775
776
777 static void usbtouch_irq(struct urb *urb)
778 {
779         struct usbtouch_usb *usbtouch = urb->context;
780         int retval;
781
782         switch (urb->status) {
783         case 0:
784                 /* success */
785                 break;
786         case -ETIME:
787                 /* this urb is timing out */
788                 dbg("%s - urb timed out - was the device unplugged?",
789                     __FUNCTION__);
790                 return;
791         case -ECONNRESET:
792         case -ENOENT:
793         case -ESHUTDOWN:
794                 /* this urb is terminated, clean up */
795                 dbg("%s - urb shutting down with status: %d",
796                     __FUNCTION__, urb->status);
797                 return;
798         default:
799                 dbg("%s - nonzero urb status received: %d",
800                     __FUNCTION__, urb->status);
801                 goto exit;
802         }
803
804         usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length);
805
806 exit:
807         retval = usb_submit_urb(urb, GFP_ATOMIC);
808         if (retval)
809                 err("%s - usb_submit_urb failed with result: %d",
810                     __FUNCTION__, retval);
811 }
812
813 static int usbtouch_open(struct input_dev *input)
814 {
815         struct usbtouch_usb *usbtouch = input_get_drvdata(input);
816
817         usbtouch->irq->dev = usbtouch->udev;
818
819         if (usb_submit_urb(usbtouch->irq, GFP_KERNEL))
820                 return -EIO;
821
822         return 0;
823 }
824
825 static void usbtouch_close(struct input_dev *input)
826 {
827         struct usbtouch_usb *usbtouch = input_get_drvdata(input);
828
829         usb_kill_urb(usbtouch->irq);
830 }
831
832
833 static void usbtouch_free_buffers(struct usb_device *udev,
834                                   struct usbtouch_usb *usbtouch)
835 {
836         usb_buffer_free(udev, usbtouch->type->rept_size,
837                         usbtouch->data, usbtouch->data_dma);
838         kfree(usbtouch->buffer);
839 }
840
841
842 static int usbtouch_probe(struct usb_interface *intf,
843                           const struct usb_device_id *id)
844 {
845         struct usbtouch_usb *usbtouch;
846         struct input_dev *input_dev;
847         struct usb_host_interface *interface;
848         struct usb_endpoint_descriptor *endpoint;
849         struct usb_device *udev = interface_to_usbdev(intf);
850         struct usbtouch_device_info *type;
851         int err = -ENOMEM;
852
853         interface = intf->cur_altsetting;
854         endpoint = &interface->endpoint[0].desc;
855
856         usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL);
857         input_dev = input_allocate_device();
858         if (!usbtouch || !input_dev)
859                 goto out_free;
860
861         type = &usbtouch_dev_info[id->driver_info];
862         usbtouch->type = type;
863         if (!type->process_pkt)
864                 type->process_pkt = usbtouch_process_pkt;
865
866         usbtouch->data = usb_buffer_alloc(udev, type->rept_size,
867                                           GFP_KERNEL, &usbtouch->data_dma);
868         if (!usbtouch->data)
869                 goto out_free;
870
871         if (type->get_pkt_len) {
872                 usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL);
873                 if (!usbtouch->buffer)
874                         goto out_free_buffers;
875         }
876
877         usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
878         if (!usbtouch->irq) {
879                 dbg("%s - usb_alloc_urb failed: usbtouch->irq", __FUNCTION__);
880                 goto out_free_buffers;
881         }
882
883         usbtouch->udev = udev;
884         usbtouch->input = input_dev;
885
886         if (udev->manufacturer)
887                 strlcpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name));
888
889         if (udev->product) {
890                 if (udev->manufacturer)
891                         strlcat(usbtouch->name, " ", sizeof(usbtouch->name));
892                 strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name));
893         }
894
895         if (!strlen(usbtouch->name))
896                 snprintf(usbtouch->name, sizeof(usbtouch->name),
897                         "USB Touchscreen %04x:%04x",
898                          le16_to_cpu(udev->descriptor.idVendor),
899                          le16_to_cpu(udev->descriptor.idProduct));
900
901         usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys));
902         strlcat(usbtouch->phys, "/input0", sizeof(usbtouch->phys));
903
904         input_dev->name = usbtouch->name;
905         input_dev->phys = usbtouch->phys;
906         usb_to_input_id(udev, &input_dev->id);
907         input_dev->dev.parent = &intf->dev;
908
909         input_set_drvdata(input_dev, usbtouch);
910
911         input_dev->open = usbtouch_open;
912         input_dev->close = usbtouch_close;
913
914         input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
915         input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
916         input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0);
917         input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0);
918         if (type->max_press)
919                 input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press,
920                                      type->max_press, 0, 0);
921
922         usb_fill_int_urb(usbtouch->irq, usbtouch->udev,
923                          usb_rcvintpipe(usbtouch->udev, endpoint->bEndpointAddress),
924                          usbtouch->data, type->rept_size,
925                          usbtouch_irq, usbtouch, endpoint->bInterval);
926
927         usbtouch->irq->dev = usbtouch->udev;
928         usbtouch->irq->transfer_dma = usbtouch->data_dma;
929         usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
930
931         /* device specific init */
932         if (type->init) {
933                 err = type->init(usbtouch);
934                 if (err) {
935                         dbg("%s - type->init() failed, err: %d", __FUNCTION__, err);
936                         goto out_free_buffers;
937                 }
938         }
939
940         err = input_register_device(usbtouch->input);
941         if (err) {
942                 dbg("%s - input_register_device failed, err: %d", __FUNCTION__, err);
943                 goto out_free_buffers;
944         }
945
946         usb_set_intfdata(intf, usbtouch);
947
948         return 0;
949
950 out_free_buffers:
951         usbtouch_free_buffers(udev, usbtouch);
952 out_free:
953         input_free_device(input_dev);
954         kfree(usbtouch);
955         return err;
956 }
957
958 static void usbtouch_disconnect(struct usb_interface *intf)
959 {
960         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
961
962         dbg("%s - called", __FUNCTION__);
963
964         if (!usbtouch)
965                 return;
966
967         dbg("%s - usbtouch is initialized, cleaning up", __FUNCTION__);
968         usb_set_intfdata(intf, NULL);
969         usb_kill_urb(usbtouch->irq);
970         input_unregister_device(usbtouch->input);
971         usb_free_urb(usbtouch->irq);
972         usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch);
973         kfree(usbtouch);
974 }
975
976 MODULE_DEVICE_TABLE(usb, usbtouch_devices);
977
978 static struct usb_driver usbtouch_driver = {
979         .name           = "usbtouchscreen",
980         .probe          = usbtouch_probe,
981         .disconnect     = usbtouch_disconnect,
982         .id_table       = usbtouch_devices,
983 };
984
985 static int __init usbtouch_init(void)
986 {
987         return usb_register(&usbtouch_driver);
988 }
989
990 static void __exit usbtouch_cleanup(void)
991 {
992         usb_deregister(&usbtouch_driver);
993 }
994
995 module_init(usbtouch_init);
996 module_exit(usbtouch_cleanup);
997
998 MODULE_AUTHOR(DRIVER_AUTHOR);
999 MODULE_DESCRIPTION(DRIVER_DESC);
1000 MODULE_LICENSE("GPL");
1001
1002 MODULE_ALIAS("touchkitusb");
1003 MODULE_ALIAS("itmtouch");
1004 MODULE_ALIAS("mtouchusb");