USB: rename usb_buffer_alloc() and usb_buffer_free() users
[linux-2.6.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  *  - 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  *
20  * Copyright (C) 2004-2007 by Daniel Ritz <daniel.ritz@gmx.ch>
21  * Copyright (C) by Todd E. Johnson (mtouchusb.c)
22  *
23  * This program is free software; you can redistribute it and/or
24  * modify it under the terms of the GNU General Public License as
25  * published by the Free Software Foundation; either version 2 of the
26  * License, or (at your option) any later version.
27  *
28  * This program is distributed in the hope that it will be useful, but
29  * WITHOUT ANY WARRANTY; without even the implied warranty of
30  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
31  * General Public License for more details.
32  *
33  * You should have received a copy of the GNU General Public License
34  * along with this program; if not, write to the Free Software
35  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
36  *
37  * Driver is based on touchkitusb.c
38  * - ITM parts are from itmtouch.c
39  * - 3M parts are from mtouchusb.c
40  * - PanJit parts are from an unmerged driver by Lanslott Gish
41  * - DMC TSC 10/25 are from Holger Schurig, with ideas from an unmerged
42  *   driver from Marius Vollmer
43  *
44  *****************************************************************************/
45
46 //#define DEBUG
47
48 #include <linux/kernel.h>
49 #include <linux/slab.h>
50 #include <linux/input.h>
51 #include <linux/module.h>
52 #include <linux/init.h>
53 #include <linux/usb.h>
54 #include <linux/usb/input.h>
55 #include <linux/hid.h>
56
57
58 #define DRIVER_VERSION          "v0.6"
59 #define DRIVER_AUTHOR           "Daniel Ritz <daniel.ritz@gmx.ch>"
60 #define DRIVER_DESC             "USB Touchscreen Driver"
61
62 static int swap_xy;
63 module_param(swap_xy, bool, 0644);
64 MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");
65
66 static int hwcalib_xy;
67 module_param(hwcalib_xy, bool, 0644);
68 MODULE_PARM_DESC(hwcalib_xy, "If set hw-calibrated X/Y are used if available");
69
70 /* device specifc data/functions */
71 struct usbtouch_usb;
72 struct usbtouch_device_info {
73         int min_xc, max_xc;
74         int min_yc, max_yc;
75         int min_press, max_press;
76         int rept_size;
77
78         /*
79          * Always service the USB devices irq not just when the input device is
80          * open. This is useful when devices have a watchdog which prevents us
81          * from periodically polling the device. Leave this unset unless your
82          * touchscreen device requires it, as it does consume more of the USB
83          * bandwidth.
84          */
85         bool irq_always;
86
87         void (*process_pkt) (struct usbtouch_usb *usbtouch, unsigned char *pkt, int len);
88
89         /*
90          * used to get the packet len. possible return values:
91          * > 0: packet len
92          * = 0: skip one byte
93          * < 0: -return value more bytes needed
94          */
95         int  (*get_pkt_len) (unsigned char *pkt, int len);
96
97         int  (*read_data)   (struct usbtouch_usb *usbtouch, unsigned char *pkt);
98         int  (*init)        (struct usbtouch_usb *usbtouch);
99         void (*exit)        (struct usbtouch_usb *usbtouch);
100 };
101
102 /* a usbtouch device */
103 struct usbtouch_usb {
104         unsigned char *data;
105         dma_addr_t data_dma;
106         unsigned char *buffer;
107         int buf_len;
108         struct urb *irq;
109         struct usb_interface *interface;
110         struct input_dev *input;
111         struct usbtouch_device_info *type;
112         char name[128];
113         char phys[64];
114         void *priv;
115
116         int x, y;
117         int touch, press;
118 };
119
120
121 /* device types */
122 enum {
123         DEVTYPE_IGNORE = -1,
124         DEVTYPE_EGALAX,
125         DEVTYPE_PANJIT,
126         DEVTYPE_3M,
127         DEVTYPE_ITM,
128         DEVTYPE_ETURBO,
129         DEVTYPE_GUNZE,
130         DEVTYPE_DMC_TSC10,
131         DEVTYPE_IRTOUCH,
132         DEVTYPE_IDEALTEK,
133         DEVTYPE_GENERAL_TOUCH,
134         DEVTYPE_GOTOP,
135         DEVTYPE_JASTEC,
136         DEVTYPE_E2I,
137         DEVTYPE_ZYTRONIC,
138         DEVTYPE_TC5UH,
139         DEVTYPE_NEXIO,
140 };
141
142 #define USB_DEVICE_HID_CLASS(vend, prod) \
143         .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS \
144                 | USB_DEVICE_ID_MATCH_INT_PROTOCOL \
145                 | USB_DEVICE_ID_MATCH_DEVICE, \
146         .idVendor = (vend), \
147         .idProduct = (prod), \
148         .bInterfaceClass = USB_INTERFACE_CLASS_HID, \
149         .bInterfaceProtocol = USB_INTERFACE_PROTOCOL_MOUSE
150
151 static const struct usb_device_id usbtouch_devices[] = {
152 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
153         /* ignore the HID capable devices, handled by usbhid */
154         {USB_DEVICE_HID_CLASS(0x0eef, 0x0001), .driver_info = DEVTYPE_IGNORE},
155         {USB_DEVICE_HID_CLASS(0x0eef, 0x0002), .driver_info = DEVTYPE_IGNORE},
156
157         /* normal device IDs */
158         {USB_DEVICE(0x3823, 0x0001), .driver_info = DEVTYPE_EGALAX},
159         {USB_DEVICE(0x3823, 0x0002), .driver_info = DEVTYPE_EGALAX},
160         {USB_DEVICE(0x0123, 0x0001), .driver_info = DEVTYPE_EGALAX},
161         {USB_DEVICE(0x0eef, 0x0001), .driver_info = DEVTYPE_EGALAX},
162         {USB_DEVICE(0x0eef, 0x0002), .driver_info = DEVTYPE_EGALAX},
163         {USB_DEVICE(0x1234, 0x0001), .driver_info = DEVTYPE_EGALAX},
164         {USB_DEVICE(0x1234, 0x0002), .driver_info = DEVTYPE_EGALAX},
165 #endif
166
167 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
168         {USB_DEVICE(0x134c, 0x0001), .driver_info = DEVTYPE_PANJIT},
169         {USB_DEVICE(0x134c, 0x0002), .driver_info = DEVTYPE_PANJIT},
170         {USB_DEVICE(0x134c, 0x0003), .driver_info = DEVTYPE_PANJIT},
171         {USB_DEVICE(0x134c, 0x0004), .driver_info = DEVTYPE_PANJIT},
172 #endif
173
174 #ifdef CONFIG_TOUCHSCREEN_USB_3M
175         {USB_DEVICE(0x0596, 0x0001), .driver_info = DEVTYPE_3M},
176 #endif
177
178 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
179         {USB_DEVICE(0x0403, 0xf9e9), .driver_info = DEVTYPE_ITM},
180 #endif
181
182 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
183         {USB_DEVICE(0x1234, 0x5678), .driver_info = DEVTYPE_ETURBO},
184 #endif
185
186 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
187         {USB_DEVICE(0x0637, 0x0001), .driver_info = DEVTYPE_GUNZE},
188 #endif
189
190 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
191         {USB_DEVICE(0x0afa, 0x03e8), .driver_info = DEVTYPE_DMC_TSC10},
192 #endif
193
194 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
195         {USB_DEVICE(0x595a, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
196         {USB_DEVICE(0x6615, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
197 #endif
198
199 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
200         {USB_DEVICE(0x1391, 0x1000), .driver_info = DEVTYPE_IDEALTEK},
201 #endif
202
203 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
204         {USB_DEVICE(0x0dfc, 0x0001), .driver_info = DEVTYPE_GENERAL_TOUCH},
205 #endif
206
207 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
208         {USB_DEVICE(0x08f2, 0x007f), .driver_info = DEVTYPE_GOTOP},
209         {USB_DEVICE(0x08f2, 0x00ce), .driver_info = DEVTYPE_GOTOP},
210         {USB_DEVICE(0x08f2, 0x00f4), .driver_info = DEVTYPE_GOTOP},
211 #endif
212
213 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
214         {USB_DEVICE(0x0f92, 0x0001), .driver_info = DEVTYPE_JASTEC},
215 #endif
216
217 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
218         {USB_DEVICE(0x1ac7, 0x0001), .driver_info = DEVTYPE_E2I},
219 #endif
220
221 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
222         {USB_DEVICE(0x14c8, 0x0003), .driver_info = DEVTYPE_ZYTRONIC},
223 #endif
224
225 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC5UH
226         {USB_DEVICE(0x0664, 0x0309), .driver_info = DEVTYPE_TC5UH},
227 #endif
228
229 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
230         /* data interface only */
231         {USB_DEVICE_AND_INTERFACE_INFO(0x10f0, 0x2002, 0x0a, 0x00, 0x00),
232                 .driver_info = DEVTYPE_NEXIO},
233         {USB_DEVICE_AND_INTERFACE_INFO(0x1870, 0x0001, 0x0a, 0x00, 0x00),
234                 .driver_info = DEVTYPE_NEXIO},
235 #endif
236
237         {}
238 };
239
240
241 /*****************************************************************************
242  * e2i Part
243  */
244
245 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
246 static int e2i_init(struct usbtouch_usb *usbtouch)
247 {
248         int ret;
249         struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
250
251         ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
252                               0x01, 0x02, 0x0000, 0x0081,
253                               NULL, 0, USB_CTRL_SET_TIMEOUT);
254
255         dbg("%s - usb_control_msg - E2I_RESET - bytes|err: %d",
256             __func__, ret);
257         return ret;
258 }
259
260 static int e2i_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
261 {
262         int tmp = (pkt[0] << 8) | pkt[1];
263         dev->x  = (pkt[2] << 8) | pkt[3];
264         dev->y  = (pkt[4] << 8) | pkt[5];
265
266         tmp = tmp - 0xA000;
267         dev->touch = (tmp > 0);
268         dev->press = (tmp > 0 ? tmp : 0);
269
270         return 1;
271 }
272 #endif
273
274
275 /*****************************************************************************
276  * eGalax part
277  */
278
279 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
280
281 #ifndef MULTI_PACKET
282 #define MULTI_PACKET
283 #endif
284
285 #define EGALAX_PKT_TYPE_MASK            0xFE
286 #define EGALAX_PKT_TYPE_REPT            0x80
287 #define EGALAX_PKT_TYPE_DIAG            0x0A
288
289 static int egalax_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
290 {
291         if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT)
292                 return 0;
293
294         dev->x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F);
295         dev->y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F);
296         dev->touch = pkt[0] & 0x01;
297
298         return 1;
299 }
300
301 static int egalax_get_pkt_len(unsigned char *buf, int len)
302 {
303         switch (buf[0] & EGALAX_PKT_TYPE_MASK) {
304         case EGALAX_PKT_TYPE_REPT:
305                 return 5;
306
307         case EGALAX_PKT_TYPE_DIAG:
308                 if (len < 2)
309                         return -1;
310
311                 return buf[1] + 2;
312         }
313
314         return 0;
315 }
316 #endif
317
318
319 /*****************************************************************************
320  * PanJit Part
321  */
322 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
323 static int panjit_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
324 {
325         dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
326         dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
327         dev->touch = pkt[0] & 0x01;
328
329         return 1;
330 }
331 #endif
332
333
334 /*****************************************************************************
335  * 3M/Microtouch Part
336  */
337 #ifdef CONFIG_TOUCHSCREEN_USB_3M
338
339 #define MTOUCHUSB_ASYNC_REPORT          1
340 #define MTOUCHUSB_RESET                 7
341 #define MTOUCHUSB_REQ_CTRLLR_ID         10
342
343 static int mtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
344 {
345         if (hwcalib_xy) {
346                 dev->x = (pkt[4] << 8) | pkt[3];
347                 dev->y = 0xffff - ((pkt[6] << 8) | pkt[5]);
348         } else {
349                 dev->x = (pkt[8] << 8) | pkt[7];
350                 dev->y = (pkt[10] << 8) | pkt[9];
351         }
352         dev->touch = (pkt[2] & 0x40) ? 1 : 0;
353
354         return 1;
355 }
356
357 static int mtouch_init(struct usbtouch_usb *usbtouch)
358 {
359         int ret, i;
360         struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
361
362         ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
363                               MTOUCHUSB_RESET,
364                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
365                               1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
366         dbg("%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d",
367             __func__, ret);
368         if (ret < 0)
369                 return ret;
370         msleep(150);
371
372         for (i = 0; i < 3; i++) {
373                 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
374                                       MTOUCHUSB_ASYNC_REPORT,
375                                       USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
376                                       1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT);
377                 dbg("%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d",
378                     __func__, ret);
379                 if (ret >= 0)
380                         break;
381                 if (ret != -EPIPE)
382                         return ret;
383         }
384
385         /* Default min/max xy are the raw values, override if using hw-calib */
386         if (hwcalib_xy) {
387                 input_set_abs_params(usbtouch->input, ABS_X, 0, 0xffff, 0, 0);
388                 input_set_abs_params(usbtouch->input, ABS_Y, 0, 0xffff, 0, 0);
389         }
390
391         return 0;
392 }
393 #endif
394
395
396 /*****************************************************************************
397  * ITM Part
398  */
399 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
400 static int itm_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
401 {
402         int touch;
403         /*
404          * ITM devices report invalid x/y data if not touched.
405          * if the screen was touched before but is not touched any more
406          * report touch as 0 with the last valid x/y data once. then stop
407          * reporting data until touched again.
408          */
409         dev->press = ((pkt[2] & 0x01) << 7) | (pkt[5] & 0x7F);
410
411         touch = ~pkt[7] & 0x20;
412         if (!touch) {
413                 if (dev->touch) {
414                         dev->touch = 0;
415                         return 1;
416                 }
417
418                 return 0;
419         }
420
421         dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F);
422         dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F);
423         dev->touch = touch;
424
425         return 1;
426 }
427 #endif
428
429
430 /*****************************************************************************
431  * eTurboTouch part
432  */
433 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
434 #ifndef MULTI_PACKET
435 #define MULTI_PACKET
436 #endif
437 static int eturbo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
438 {
439         unsigned int shift;
440
441         /* packets should start with sync */
442         if (!(pkt[0] & 0x80))
443                 return 0;
444
445         shift = (6 - (pkt[0] & 0x03));
446         dev->x = ((pkt[3] << 7) | pkt[4]) >> shift;
447         dev->y = ((pkt[1] << 7) | pkt[2]) >> shift;
448         dev->touch = (pkt[0] & 0x10) ? 1 : 0;
449
450         return 1;
451 }
452
453 static int eturbo_get_pkt_len(unsigned char *buf, int len)
454 {
455         if (buf[0] & 0x80)
456                 return 5;
457         if (buf[0] == 0x01)
458                 return 3;
459         return 0;
460 }
461 #endif
462
463
464 /*****************************************************************************
465  * Gunze part
466  */
467 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
468 static int gunze_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
469 {
470         if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80))
471                 return 0;
472
473         dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F);
474         dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F);
475         dev->touch = pkt[0] & 0x20;
476
477         return 1;
478 }
479 #endif
480
481 /*****************************************************************************
482  * DMC TSC-10/25 Part
483  *
484  * Documentation about the controller and it's protocol can be found at
485  *   http://www.dmccoltd.com/files/controler/tsc10usb_pi_e.pdf
486  *   http://www.dmccoltd.com/files/controler/tsc25_usb_e.pdf
487  */
488 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
489
490 /* supported data rates. currently using 130 */
491 #define TSC10_RATE_POINT        0x50
492 #define TSC10_RATE_30           0x40
493 #define TSC10_RATE_50           0x41
494 #define TSC10_RATE_80           0x42
495 #define TSC10_RATE_100          0x43
496 #define TSC10_RATE_130          0x44
497 #define TSC10_RATE_150          0x45
498
499 /* commands */
500 #define TSC10_CMD_RESET         0x55
501 #define TSC10_CMD_RATE          0x05
502 #define TSC10_CMD_DATA1         0x01
503
504 static int dmc_tsc10_init(struct usbtouch_usb *usbtouch)
505 {
506         struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
507         int ret = -ENOMEM;
508         unsigned char *buf;
509
510         buf = kmalloc(2, GFP_KERNEL);
511         if (!buf)
512                 goto err_nobuf;
513         /* reset */
514         buf[0] = buf[1] = 0xFF;
515         ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
516                               TSC10_CMD_RESET,
517                               USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
518                               0, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
519         if (ret < 0)
520                 goto err_out;
521         if (buf[0] != 0x06) {
522                 ret = -ENODEV;
523                 goto err_out;
524         }
525
526         /* set coordinate output rate */
527         buf[0] = buf[1] = 0xFF;
528         ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
529                               TSC10_CMD_RATE,
530                               USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
531                               TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
532         if (ret < 0)
533                 goto err_out;
534         if ((buf[0] != 0x06) && (buf[0] != 0x15 || buf[1] != 0x01)) {
535                 ret = -ENODEV;
536                 goto err_out;
537         }
538
539         /* start sending data */
540         ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
541                               TSC10_CMD_DATA1,
542                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
543                               0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
544 err_out:
545         kfree(buf);
546 err_nobuf:
547         return ret;
548 }
549
550
551 static int dmc_tsc10_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
552 {
553         dev->x = ((pkt[2] & 0x03) << 8) | pkt[1];
554         dev->y = ((pkt[4] & 0x03) << 8) | pkt[3];
555         dev->touch = pkt[0] & 0x01;
556
557         return 1;
558 }
559 #endif
560
561
562 /*****************************************************************************
563  * IRTOUCH Part
564  */
565 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
566 static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
567 {
568         dev->x = (pkt[3] << 8) | pkt[2];
569         dev->y = (pkt[5] << 8) | pkt[4];
570         dev->touch = (pkt[1] & 0x03) ? 1 : 0;
571
572         return 1;
573 }
574 #endif
575
576 /*****************************************************************************
577  * ET&T TC5UH part
578  */
579 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC5UH
580 static int tc5uh_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
581 {
582         dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
583         dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
584         dev->touch = pkt[0] & 0x01;
585
586         return 1;
587 }
588 #endif
589
590 /*****************************************************************************
591  * IdealTEK URTC1000 Part
592  */
593 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
594 #ifndef MULTI_PACKET
595 #define MULTI_PACKET
596 #endif
597 static int idealtek_get_pkt_len(unsigned char *buf, int len)
598 {
599         if (buf[0] & 0x80)
600                 return 5;
601         if (buf[0] == 0x01)
602                 return len;
603         return 0;
604 }
605
606 static int idealtek_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
607 {
608         switch (pkt[0] & 0x98) {
609         case 0x88:
610                 /* touch data in IdealTEK mode */
611                 dev->x = (pkt[1] << 5) | (pkt[2] >> 2);
612                 dev->y = (pkt[3] << 5) | (pkt[4] >> 2);
613                 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
614                 return 1;
615
616         case 0x98:
617                 /* touch data in MT emulation mode */
618                 dev->x = (pkt[2] << 5) | (pkt[1] >> 2);
619                 dev->y = (pkt[4] << 5) | (pkt[3] >> 2);
620                 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
621                 return 1;
622
623         default:
624                 return 0;
625         }
626 }
627 #endif
628
629 /*****************************************************************************
630  * General Touch Part
631  */
632 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
633 static int general_touch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
634 {
635         dev->x = (pkt[2] << 8) | pkt[1];
636         dev->y = (pkt[4] << 8) | pkt[3];
637         dev->press = pkt[5] & 0xff;
638         dev->touch = pkt[0] & 0x01;
639
640         return 1;
641 }
642 #endif
643
644 /*****************************************************************************
645  * GoTop Part
646  */
647 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
648 static int gotop_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
649 {
650         dev->x = ((pkt[1] & 0x38) << 4) | pkt[2];
651         dev->y = ((pkt[1] & 0x07) << 7) | pkt[3];
652         dev->touch = pkt[0] & 0x01;
653
654         return 1;
655 }
656 #endif
657
658 /*****************************************************************************
659  * JASTEC Part
660  */
661 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
662 static int jastec_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
663 {
664         dev->x = ((pkt[0] & 0x3f) << 6) | (pkt[2] & 0x3f);
665         dev->y = ((pkt[1] & 0x3f) << 6) | (pkt[3] & 0x3f);
666         dev->touch = (pkt[0] & 0x40) >> 6;
667
668         return 1;
669 }
670 #endif
671
672 /*****************************************************************************
673  * Zytronic Part
674  */
675 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
676 static int zytronic_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
677 {
678         switch (pkt[0]) {
679         case 0x3A: /* command response */
680                 dbg("%s: Command response %d", __func__, pkt[1]);
681                 break;
682
683         case 0xC0: /* down */
684                 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
685                 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
686                 dev->touch = 1;
687                 dbg("%s: down %d,%d", __func__, dev->x, dev->y);
688                 return 1;
689
690         case 0x80: /* up */
691                 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
692                 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
693                 dev->touch = 0;
694                 dbg("%s: up %d,%d", __func__, dev->x, dev->y);
695                 return 1;
696
697         default:
698                 dbg("%s: Unknown return %d", __func__, pkt[0]);
699                 break;
700         }
701
702         return 0;
703 }
704 #endif
705
706 /*****************************************************************************
707  * NEXIO Part
708  */
709 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
710
711 #define NEXIO_TIMEOUT   5000
712 #define NEXIO_BUFSIZE   1024
713 #define NEXIO_THRESHOLD 50
714
715 struct nexio_priv {
716         struct urb *ack;
717         unsigned char *ack_buf;
718 };
719
720 struct nexio_touch_packet {
721         u8      flags;          /* 0xe1 = touch, 0xe1 = release */
722         __be16  data_len;       /* total bytes of touch data */
723         __be16  x_len;          /* bytes for X axis */
724         __be16  y_len;          /* bytes for Y axis */
725         u8      data[];
726 } __attribute__ ((packed));
727
728 static unsigned char nexio_ack_pkt[2] = { 0xaa, 0x02 };
729 static unsigned char nexio_init_pkt[4] = { 0x82, 0x04, 0x0a, 0x0f };
730
731 static void nexio_ack_complete(struct urb *urb)
732 {
733 }
734
735 static int nexio_init(struct usbtouch_usb *usbtouch)
736 {
737         struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
738         struct usb_host_interface *interface = usbtouch->interface->cur_altsetting;
739         struct nexio_priv *priv;
740         int ret = -ENOMEM;
741         int actual_len, i;
742         unsigned char *buf;
743         char *firmware_ver = NULL, *device_name = NULL;
744         int input_ep = 0, output_ep = 0;
745
746         /* find first input and output endpoint */
747         for (i = 0; i < interface->desc.bNumEndpoints; i++) {
748                 if (!input_ep &&
749                     usb_endpoint_dir_in(&interface->endpoint[i].desc))
750                         input_ep = interface->endpoint[i].desc.bEndpointAddress;
751                 if (!output_ep &&
752                     usb_endpoint_dir_out(&interface->endpoint[i].desc))
753                         output_ep = interface->endpoint[i].desc.bEndpointAddress;
754         }
755         if (!input_ep || !output_ep)
756                 return -ENXIO;
757
758         buf = kmalloc(NEXIO_BUFSIZE, GFP_KERNEL);
759         if (!buf)
760                 goto out_buf;
761
762         /* two empty reads */
763         for (i = 0; i < 2; i++) {
764                 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
765                                    buf, NEXIO_BUFSIZE, &actual_len,
766                                    NEXIO_TIMEOUT);
767                 if (ret < 0)
768                         goto out_buf;
769         }
770
771         /* send init command */
772         memcpy(buf, nexio_init_pkt, sizeof(nexio_init_pkt));
773         ret = usb_bulk_msg(dev, usb_sndbulkpipe(dev, output_ep),
774                            buf, sizeof(nexio_init_pkt), &actual_len,
775                            NEXIO_TIMEOUT);
776         if (ret < 0)
777                 goto out_buf;
778
779         /* read replies */
780         for (i = 0; i < 3; i++) {
781                 memset(buf, 0, NEXIO_BUFSIZE);
782                 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
783                                    buf, NEXIO_BUFSIZE, &actual_len,
784                                    NEXIO_TIMEOUT);
785                 if (ret < 0 || actual_len < 1 || buf[1] != actual_len)
786                         continue;
787                 switch (buf[0]) {
788                 case 0x83:      /* firmware version */
789                         if (!firmware_ver)
790                                 firmware_ver = kstrdup(&buf[2], GFP_KERNEL);
791                         break;
792                 case 0x84:      /* device name */
793                         if (!device_name)
794                                 device_name = kstrdup(&buf[2], GFP_KERNEL);
795                         break;
796                 }
797         }
798
799         printk(KERN_INFO "Nexio device: %s, firmware version: %s\n",
800                device_name, firmware_ver);
801
802         kfree(firmware_ver);
803         kfree(device_name);
804
805         /* prepare ACK URB */
806         ret = -ENOMEM;
807
808         usbtouch->priv = kmalloc(sizeof(struct nexio_priv), GFP_KERNEL);
809         if (!usbtouch->priv)
810                 goto out_buf;
811
812         priv = usbtouch->priv;
813
814         priv->ack_buf = kmalloc(sizeof(nexio_ack_pkt), GFP_KERNEL);
815         if (!priv->ack_buf)
816                 goto err_priv;
817
818         memcpy(priv->ack_buf, nexio_ack_pkt, sizeof(nexio_ack_pkt));
819
820         priv->ack = usb_alloc_urb(0, GFP_KERNEL);
821         if (!priv->ack) {
822                 dbg("%s - usb_alloc_urb failed: usbtouch->ack", __func__);
823                 goto err_ack_buf;
824         }
825
826         usb_fill_bulk_urb(priv->ack, dev, usb_sndbulkpipe(dev, output_ep),
827                           priv->ack_buf, sizeof(nexio_ack_pkt),
828                           nexio_ack_complete, usbtouch);
829         ret = 0;
830         goto out_buf;
831
832 err_ack_buf:
833         kfree(priv->ack_buf);
834 err_priv:
835         kfree(priv);
836 out_buf:
837         kfree(buf);
838         return ret;
839 }
840
841 static void nexio_exit(struct usbtouch_usb *usbtouch)
842 {
843         struct nexio_priv *priv = usbtouch->priv;
844
845         usb_kill_urb(priv->ack);
846         usb_free_urb(priv->ack);
847         kfree(priv->ack_buf);
848         kfree(priv);
849 }
850
851 static int nexio_read_data(struct usbtouch_usb *usbtouch, unsigned char *pkt)
852 {
853         int x, y, begin_x, begin_y, end_x, end_y, w, h, ret;
854         struct nexio_touch_packet *packet = (void *) pkt;
855         struct nexio_priv *priv = usbtouch->priv;
856
857         /* got touch data? */
858         if ((pkt[0] & 0xe0) != 0xe0)
859                 return 0;
860
861         /* send ACK */
862         ret = usb_submit_urb(priv->ack, GFP_ATOMIC);
863
864         if (!usbtouch->type->max_xc) {
865                 usbtouch->type->max_xc = 2 * be16_to_cpu(packet->x_len);
866                 input_set_abs_params(usbtouch->input, ABS_X, 0,
867                                      2 * be16_to_cpu(packet->x_len), 0, 0);
868                 usbtouch->type->max_yc = 2 * be16_to_cpu(packet->y_len);
869                 input_set_abs_params(usbtouch->input, ABS_Y, 0,
870                                      2 * be16_to_cpu(packet->y_len), 0, 0);
871         }
872         /*
873          * The device reports state of IR sensors on X and Y axes.
874          * Each byte represents "darkness" percentage (0-100) of one element.
875          * 17" touchscreen reports only 64 x 52 bytes so the resolution is low.
876          * This also means that there's a limited multi-touch capability but
877          * it's disabled (and untested) here as there's no X driver for that.
878          */
879         begin_x = end_x = begin_y = end_y = -1;
880         for (x = 0; x < be16_to_cpu(packet->x_len); x++) {
881                 if (begin_x == -1 && packet->data[x] > NEXIO_THRESHOLD) {
882                         begin_x = x;
883                         continue;
884                 }
885                 if (end_x == -1 && begin_x != -1 && packet->data[x] < NEXIO_THRESHOLD) {
886                         end_x = x - 1;
887                         for (y = be16_to_cpu(packet->x_len);
888                              y < be16_to_cpu(packet->data_len); y++) {
889                                 if (begin_y == -1 && packet->data[y] > NEXIO_THRESHOLD) {
890                                         begin_y = y - be16_to_cpu(packet->x_len);
891                                         continue;
892                                 }
893                                 if (end_y == -1 &&
894                                     begin_y != -1 && packet->data[y] < NEXIO_THRESHOLD) {
895                                         end_y = y - 1 - be16_to_cpu(packet->x_len);
896                                         w = end_x - begin_x;
897                                         h = end_y - begin_y;
898 #if 0
899                                         /* multi-touch */
900                                         input_report_abs(usbtouch->input,
901                                                     ABS_MT_TOUCH_MAJOR, max(w,h));
902                                         input_report_abs(usbtouch->input,
903                                                     ABS_MT_TOUCH_MINOR, min(x,h));
904                                         input_report_abs(usbtouch->input,
905                                                     ABS_MT_POSITION_X, 2*begin_x+w);
906                                         input_report_abs(usbtouch->input,
907                                                     ABS_MT_POSITION_Y, 2*begin_y+h);
908                                         input_report_abs(usbtouch->input,
909                                                     ABS_MT_ORIENTATION, w > h);
910                                         input_mt_sync(usbtouch->input);
911 #endif
912                                         /* single touch */
913                                         usbtouch->x = 2 * begin_x + w;
914                                         usbtouch->y = 2 * begin_y + h;
915                                         usbtouch->touch = packet->flags & 0x01;
916                                         begin_y = end_y = -1;
917                                         return 1;
918                                 }
919                         }
920                         begin_x = end_x = -1;
921                 }
922
923         }
924         return 0;
925 }
926 #endif
927
928
929 /*****************************************************************************
930  * the different device descriptors
931  */
932 #ifdef MULTI_PACKET
933 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
934                                    unsigned char *pkt, int len);
935 #endif
936
937 static struct usbtouch_device_info usbtouch_dev_info[] = {
938 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
939         [DEVTYPE_EGALAX] = {
940                 .min_xc         = 0x0,
941                 .max_xc         = 0x07ff,
942                 .min_yc         = 0x0,
943                 .max_yc         = 0x07ff,
944                 .rept_size      = 16,
945                 .process_pkt    = usbtouch_process_multi,
946                 .get_pkt_len    = egalax_get_pkt_len,
947                 .read_data      = egalax_read_data,
948         },
949 #endif
950
951 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
952         [DEVTYPE_PANJIT] = {
953                 .min_xc         = 0x0,
954                 .max_xc         = 0x0fff,
955                 .min_yc         = 0x0,
956                 .max_yc         = 0x0fff,
957                 .rept_size      = 8,
958                 .read_data      = panjit_read_data,
959         },
960 #endif
961
962 #ifdef CONFIG_TOUCHSCREEN_USB_3M
963         [DEVTYPE_3M] = {
964                 .min_xc         = 0x0,
965                 .max_xc         = 0x4000,
966                 .min_yc         = 0x0,
967                 .max_yc         = 0x4000,
968                 .rept_size      = 11,
969                 .read_data      = mtouch_read_data,
970                 .init           = mtouch_init,
971         },
972 #endif
973
974 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
975         [DEVTYPE_ITM] = {
976                 .min_xc         = 0x0,
977                 .max_xc         = 0x0fff,
978                 .min_yc         = 0x0,
979                 .max_yc         = 0x0fff,
980                 .max_press      = 0xff,
981                 .rept_size      = 8,
982                 .read_data      = itm_read_data,
983         },
984 #endif
985
986 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
987         [DEVTYPE_ETURBO] = {
988                 .min_xc         = 0x0,
989                 .max_xc         = 0x07ff,
990                 .min_yc         = 0x0,
991                 .max_yc         = 0x07ff,
992                 .rept_size      = 8,
993                 .process_pkt    = usbtouch_process_multi,
994                 .get_pkt_len    = eturbo_get_pkt_len,
995                 .read_data      = eturbo_read_data,
996         },
997 #endif
998
999 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
1000         [DEVTYPE_GUNZE] = {
1001                 .min_xc         = 0x0,
1002                 .max_xc         = 0x0fff,
1003                 .min_yc         = 0x0,
1004                 .max_yc         = 0x0fff,
1005                 .rept_size      = 4,
1006                 .read_data      = gunze_read_data,
1007         },
1008 #endif
1009
1010 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
1011         [DEVTYPE_DMC_TSC10] = {
1012                 .min_xc         = 0x0,
1013                 .max_xc         = 0x03ff,
1014                 .min_yc         = 0x0,
1015                 .max_yc         = 0x03ff,
1016                 .rept_size      = 5,
1017                 .init           = dmc_tsc10_init,
1018                 .read_data      = dmc_tsc10_read_data,
1019         },
1020 #endif
1021
1022 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
1023         [DEVTYPE_IRTOUCH] = {
1024                 .min_xc         = 0x0,
1025                 .max_xc         = 0x0fff,
1026                 .min_yc         = 0x0,
1027                 .max_yc         = 0x0fff,
1028                 .rept_size      = 8,
1029                 .read_data      = irtouch_read_data,
1030         },
1031 #endif
1032
1033 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
1034         [DEVTYPE_IDEALTEK] = {
1035                 .min_xc         = 0x0,
1036                 .max_xc         = 0x0fff,
1037                 .min_yc         = 0x0,
1038                 .max_yc         = 0x0fff,
1039                 .rept_size      = 8,
1040                 .process_pkt    = usbtouch_process_multi,
1041                 .get_pkt_len    = idealtek_get_pkt_len,
1042                 .read_data      = idealtek_read_data,
1043         },
1044 #endif
1045
1046 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
1047         [DEVTYPE_GENERAL_TOUCH] = {
1048                 .min_xc         = 0x0,
1049                 .max_xc         = 0x7fff,
1050                 .min_yc         = 0x0,
1051                 .max_yc         = 0x7fff,
1052                 .rept_size      = 7,
1053                 .read_data      = general_touch_read_data,
1054         },
1055 #endif
1056
1057 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
1058         [DEVTYPE_GOTOP] = {
1059                 .min_xc         = 0x0,
1060                 .max_xc         = 0x03ff,
1061                 .min_yc         = 0x0,
1062                 .max_yc         = 0x03ff,
1063                 .rept_size      = 4,
1064                 .read_data      = gotop_read_data,
1065         },
1066 #endif
1067
1068 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
1069         [DEVTYPE_JASTEC] = {
1070                 .min_xc         = 0x0,
1071                 .max_xc         = 0x0fff,
1072                 .min_yc         = 0x0,
1073                 .max_yc         = 0x0fff,
1074                 .rept_size      = 4,
1075                 .read_data      = jastec_read_data,
1076         },
1077 #endif
1078
1079 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
1080         [DEVTYPE_E2I] = {
1081                 .min_xc         = 0x0,
1082                 .max_xc         = 0x7fff,
1083                 .min_yc         = 0x0,
1084                 .max_yc         = 0x7fff,
1085                 .rept_size      = 6,
1086                 .init           = e2i_init,
1087                 .read_data      = e2i_read_data,
1088         },
1089 #endif
1090
1091 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
1092         [DEVTYPE_ZYTRONIC] = {
1093                 .min_xc         = 0x0,
1094                 .max_xc         = 0x03ff,
1095                 .min_yc         = 0x0,
1096                 .max_yc         = 0x03ff,
1097                 .rept_size      = 5,
1098                 .read_data      = zytronic_read_data,
1099                 .irq_always     = true,
1100         },
1101 #endif
1102
1103 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC5UH
1104         [DEVTYPE_TC5UH] = {
1105                 .min_xc         = 0x0,
1106                 .max_xc         = 0x0fff,
1107                 .min_yc         = 0x0,
1108                 .max_yc         = 0x0fff,
1109                 .rept_size      = 5,
1110                 .read_data      = tc5uh_read_data,
1111         },
1112 #endif
1113
1114 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
1115         [DEVTYPE_NEXIO] = {
1116                 .rept_size      = 128,
1117                 .irq_always     = true,
1118                 .read_data      = nexio_read_data,
1119                 .init           = nexio_init,
1120                 .exit           = nexio_exit,
1121         },
1122 #endif
1123 };
1124
1125
1126 /*****************************************************************************
1127  * Generic Part
1128  */
1129 static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
1130                                  unsigned char *pkt, int len)
1131 {
1132         struct usbtouch_device_info *type = usbtouch->type;
1133
1134         if (!type->read_data(usbtouch, pkt))
1135                         return;
1136
1137         input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch);
1138
1139         if (swap_xy) {
1140                 input_report_abs(usbtouch->input, ABS_X, usbtouch->y);
1141                 input_report_abs(usbtouch->input, ABS_Y, usbtouch->x);
1142         } else {
1143                 input_report_abs(usbtouch->input, ABS_X, usbtouch->x);
1144                 input_report_abs(usbtouch->input, ABS_Y, usbtouch->y);
1145         }
1146         if (type->max_press)
1147                 input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press);
1148         input_sync(usbtouch->input);
1149 }
1150
1151
1152 #ifdef MULTI_PACKET
1153 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1154                                    unsigned char *pkt, int len)
1155 {
1156         unsigned char *buffer;
1157         int pkt_len, pos, buf_len, tmp;
1158
1159         /* process buffer */
1160         if (unlikely(usbtouch->buf_len)) {
1161                 /* try to get size */
1162                 pkt_len = usbtouch->type->get_pkt_len(
1163                                 usbtouch->buffer, usbtouch->buf_len);
1164
1165                 /* drop? */
1166                 if (unlikely(!pkt_len))
1167                         goto out_flush_buf;
1168
1169                 /* need to append -pkt_len bytes before able to get size */
1170                 if (unlikely(pkt_len < 0)) {
1171                         int append = -pkt_len;
1172                         if (unlikely(append > len))
1173                                append = len;
1174                         if (usbtouch->buf_len + append >= usbtouch->type->rept_size)
1175                                 goto out_flush_buf;
1176                         memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append);
1177                         usbtouch->buf_len += append;
1178
1179                         pkt_len = usbtouch->type->get_pkt_len(
1180                                         usbtouch->buffer, usbtouch->buf_len);
1181                         if (pkt_len < 0)
1182                                 return;
1183                 }
1184
1185                 /* append */
1186                 tmp = pkt_len - usbtouch->buf_len;
1187                 if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size)
1188                         goto out_flush_buf;
1189                 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp);
1190                 usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len);
1191
1192                 buffer = pkt + tmp;
1193                 buf_len = len - tmp;
1194         } else {
1195                 buffer = pkt;
1196                 buf_len = len;
1197         }
1198
1199         /* loop over the received packet, process */
1200         pos = 0;
1201         while (pos < buf_len) {
1202                 /* get packet len */
1203                 pkt_len = usbtouch->type->get_pkt_len(buffer + pos,
1204                                                         buf_len - pos);
1205
1206                 /* unknown packet: skip one byte */
1207                 if (unlikely(!pkt_len)) {
1208                         pos++;
1209                         continue;
1210                 }
1211
1212                 /* full packet: process */
1213                 if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) {
1214                         usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len);
1215                 } else {
1216                         /* incomplete packet: save in buffer */
1217                         memcpy(usbtouch->buffer, buffer + pos, buf_len - pos);
1218                         usbtouch->buf_len = buf_len - pos;
1219                         return;
1220                 }
1221                 pos += pkt_len;
1222         }
1223
1224 out_flush_buf:
1225         usbtouch->buf_len = 0;
1226         return;
1227 }
1228 #endif
1229
1230
1231 static void usbtouch_irq(struct urb *urb)
1232 {
1233         struct usbtouch_usb *usbtouch = urb->context;
1234         int retval;
1235
1236         switch (urb->status) {
1237         case 0:
1238                 /* success */
1239                 break;
1240         case -ETIME:
1241                 /* this urb is timing out */
1242                 dbg("%s - urb timed out - was the device unplugged?",
1243                     __func__);
1244                 return;
1245         case -ECONNRESET:
1246         case -ENOENT:
1247         case -ESHUTDOWN:
1248         case -EPIPE:
1249                 /* this urb is terminated, clean up */
1250                 dbg("%s - urb shutting down with status: %d",
1251                     __func__, urb->status);
1252                 return;
1253         default:
1254                 dbg("%s - nonzero urb status received: %d",
1255                     __func__, urb->status);
1256                 goto exit;
1257         }
1258
1259         usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length);
1260
1261 exit:
1262         retval = usb_submit_urb(urb, GFP_ATOMIC);
1263         if (retval)
1264                 err("%s - usb_submit_urb failed with result: %d",
1265                     __func__, retval);
1266 }
1267
1268 static int usbtouch_open(struct input_dev *input)
1269 {
1270         struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1271
1272         usbtouch->irq->dev = interface_to_usbdev(usbtouch->interface);
1273
1274         if (!usbtouch->type->irq_always) {
1275                 if (usb_submit_urb(usbtouch->irq, GFP_KERNEL))
1276                   return -EIO;
1277         }
1278
1279         return 0;
1280 }
1281
1282 static void usbtouch_close(struct input_dev *input)
1283 {
1284         struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1285
1286         if (!usbtouch->type->irq_always)
1287                 usb_kill_urb(usbtouch->irq);
1288 }
1289
1290
1291 static void usbtouch_free_buffers(struct usb_device *udev,
1292                                   struct usbtouch_usb *usbtouch)
1293 {
1294         usb_free_coherent(udev, usbtouch->type->rept_size,
1295                           usbtouch->data, usbtouch->data_dma);
1296         kfree(usbtouch->buffer);
1297 }
1298
1299 static struct usb_endpoint_descriptor *
1300 usbtouch_get_input_endpoint(struct usb_host_interface *interface)
1301 {
1302         int i;
1303
1304         for (i = 0; i < interface->desc.bNumEndpoints; i++)
1305                 if (usb_endpoint_dir_in(&interface->endpoint[i].desc))
1306                         return &interface->endpoint[i].desc;
1307
1308         return NULL;
1309 }
1310
1311 static int usbtouch_probe(struct usb_interface *intf,
1312                           const struct usb_device_id *id)
1313 {
1314         struct usbtouch_usb *usbtouch;
1315         struct input_dev *input_dev;
1316         struct usb_endpoint_descriptor *endpoint;
1317         struct usb_device *udev = interface_to_usbdev(intf);
1318         struct usbtouch_device_info *type;
1319         int err = -ENOMEM;
1320
1321         /* some devices are ignored */
1322         if (id->driver_info == DEVTYPE_IGNORE)
1323                 return -ENODEV;
1324
1325         endpoint = usbtouch_get_input_endpoint(intf->cur_altsetting);
1326         if (!endpoint)
1327                 return -ENXIO;
1328
1329         usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL);
1330         input_dev = input_allocate_device();
1331         if (!usbtouch || !input_dev)
1332                 goto out_free;
1333
1334         type = &usbtouch_dev_info[id->driver_info];
1335         usbtouch->type = type;
1336         if (!type->process_pkt)
1337                 type->process_pkt = usbtouch_process_pkt;
1338
1339         usbtouch->data = usb_alloc_coherent(udev, type->rept_size,
1340                                             GFP_KERNEL, &usbtouch->data_dma);
1341         if (!usbtouch->data)
1342                 goto out_free;
1343
1344         if (type->get_pkt_len) {
1345                 usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL);
1346                 if (!usbtouch->buffer)
1347                         goto out_free_buffers;
1348         }
1349
1350         usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
1351         if (!usbtouch->irq) {
1352                 dbg("%s - usb_alloc_urb failed: usbtouch->irq", __func__);
1353                 goto out_free_buffers;
1354         }
1355
1356         usbtouch->interface = intf;
1357         usbtouch->input = input_dev;
1358
1359         if (udev->manufacturer)
1360                 strlcpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name));
1361
1362         if (udev->product) {
1363                 if (udev->manufacturer)
1364                         strlcat(usbtouch->name, " ", sizeof(usbtouch->name));
1365                 strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name));
1366         }
1367
1368         if (!strlen(usbtouch->name))
1369                 snprintf(usbtouch->name, sizeof(usbtouch->name),
1370                         "USB Touchscreen %04x:%04x",
1371                          le16_to_cpu(udev->descriptor.idVendor),
1372                          le16_to_cpu(udev->descriptor.idProduct));
1373
1374         usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys));
1375         strlcat(usbtouch->phys, "/input0", sizeof(usbtouch->phys));
1376
1377         input_dev->name = usbtouch->name;
1378         input_dev->phys = usbtouch->phys;
1379         usb_to_input_id(udev, &input_dev->id);
1380         input_dev->dev.parent = &intf->dev;
1381
1382         input_set_drvdata(input_dev, usbtouch);
1383
1384         input_dev->open = usbtouch_open;
1385         input_dev->close = usbtouch_close;
1386
1387         input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
1388         input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
1389         input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0);
1390         input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0);
1391         if (type->max_press)
1392                 input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press,
1393                                      type->max_press, 0, 0);
1394
1395         if (usb_endpoint_type(endpoint) == USB_ENDPOINT_XFER_INT)
1396                 usb_fill_int_urb(usbtouch->irq, udev,
1397                          usb_rcvintpipe(udev, endpoint->bEndpointAddress),
1398                          usbtouch->data, type->rept_size,
1399                          usbtouch_irq, usbtouch, endpoint->bInterval);
1400         else
1401                 usb_fill_bulk_urb(usbtouch->irq, udev,
1402                          usb_rcvbulkpipe(udev, endpoint->bEndpointAddress),
1403                          usbtouch->data, type->rept_size,
1404                          usbtouch_irq, usbtouch);
1405
1406         usbtouch->irq->dev = udev;
1407         usbtouch->irq->transfer_dma = usbtouch->data_dma;
1408         usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1409
1410         /* device specific init */
1411         if (type->init) {
1412                 err = type->init(usbtouch);
1413                 if (err) {
1414                         dbg("%s - type->init() failed, err: %d", __func__, err);
1415                         goto out_free_urb;
1416                 }
1417         }
1418
1419         err = input_register_device(usbtouch->input);
1420         if (err) {
1421                 dbg("%s - input_register_device failed, err: %d", __func__, err);
1422                 goto out_do_exit;
1423         }
1424
1425         usb_set_intfdata(intf, usbtouch);
1426
1427         if (usbtouch->type->irq_always) {
1428                 err = usb_submit_urb(usbtouch->irq, GFP_KERNEL);
1429                 if (err) {
1430                         err("%s - usb_submit_urb failed with result: %d",
1431                             __func__, err);
1432                         goto out_unregister_input;
1433                 }
1434         }
1435
1436         return 0;
1437
1438 out_unregister_input:
1439         input_unregister_device(input_dev);
1440         input_dev = NULL;
1441 out_do_exit:
1442         if (type->exit)
1443                 type->exit(usbtouch);
1444 out_free_urb:
1445         usb_free_urb(usbtouch->irq);
1446 out_free_buffers:
1447         usbtouch_free_buffers(udev, usbtouch);
1448 out_free:
1449         input_free_device(input_dev);
1450         kfree(usbtouch);
1451         return err;
1452 }
1453
1454 static void usbtouch_disconnect(struct usb_interface *intf)
1455 {
1456         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1457
1458         dbg("%s - called", __func__);
1459
1460         if (!usbtouch)
1461                 return;
1462
1463         dbg("%s - usbtouch is initialized, cleaning up", __func__);
1464         usb_set_intfdata(intf, NULL);
1465         /* this will stop IO via close */
1466         input_unregister_device(usbtouch->input);
1467         usb_free_urb(usbtouch->irq);
1468         if (usbtouch->type->exit)
1469                 usbtouch->type->exit(usbtouch);
1470         usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch);
1471         kfree(usbtouch);
1472 }
1473
1474 MODULE_DEVICE_TABLE(usb, usbtouch_devices);
1475
1476 static struct usb_driver usbtouch_driver = {
1477         .name           = "usbtouchscreen",
1478         .probe          = usbtouch_probe,
1479         .disconnect     = usbtouch_disconnect,
1480         .id_table       = usbtouch_devices,
1481 };
1482
1483 static int __init usbtouch_init(void)
1484 {
1485         return usb_register(&usbtouch_driver);
1486 }
1487
1488 static void __exit usbtouch_cleanup(void)
1489 {
1490         usb_deregister(&usbtouch_driver);
1491 }
1492
1493 module_init(usbtouch_init);
1494 module_exit(usbtouch_cleanup);
1495
1496 MODULE_AUTHOR(DRIVER_AUTHOR);
1497 MODULE_DESCRIPTION(DRIVER_DESC);
1498 MODULE_LICENSE("GPL");
1499
1500 MODULE_ALIAS("touchkitusb");
1501 MODULE_ALIAS("itmtouch");
1502 MODULE_ALIAS("mtouchusb");