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Linux/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  *  - Elo TouchSystems 2700 IntelliTouch
 20  *  - EasyTouch USB Dual/Multi touch controller from Data Modul
 21  *
 22  * Copyright (C) 2004-2007 by Daniel Ritz <daniel.ritz@gmx.ch>
 23  * Copyright (C) by Todd E. Johnson (mtouchusb.c)
 24  *
 25  * This program is free software; you can redistribute it and/or
 26  * modify it under the terms of the GNU General Public License as
 27  * published by the Free Software Foundation; either version 2 of the
 28  * License, or (at your option) any later version.
 29  *
 30  * This program is distributed in the hope that it will be useful, but
 31  * WITHOUT ANY WARRANTY; without even the implied warranty of
 32  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 33  * General Public License for more details.
 34  *
 35  * You should have received a copy of the GNU General Public License
 36  * along with this program; if not, write to the Free Software
 37  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 38  *
 39  * Driver is based on touchkitusb.c
 40  * - ITM parts are from itmtouch.c
 41  * - 3M parts are from mtouchusb.c
 42  * - PanJit parts are from an unmerged driver by Lanslott Gish
 43  * - DMC TSC 10/25 are from Holger Schurig, with ideas from an unmerged
 44  *   driver from Marius Vollmer
 45  *
 46  *****************************************************************************/
 47 
 48 //#define DEBUG
 49 
 50 #include <linux/kernel.h>
 51 #include <linux/slab.h>
 52 #include <linux/input.h>
 53 #include <linux/module.h>
 54 #include <linux/usb.h>
 55 #include <linux/usb/input.h>
 56 #include <linux/hid.h>
 57 
 58 
 59 #define DRIVER_VERSION          "v0.6"
 60 #define DRIVER_AUTHOR           "Daniel Ritz <daniel.ritz@gmx.ch>"
 61 #define DRIVER_DESC             "USB Touchscreen Driver"
 62 
 63 static bool swap_xy;
 64 module_param(swap_xy, bool, 0644);
 65 MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");
 66 
 67 static bool hwcalib_xy;
 68 module_param(hwcalib_xy, bool, 0644);
 69 MODULE_PARM_DESC(hwcalib_xy, "If set hw-calibrated X/Y are used if available");
 70 
 71 /* device specifc data/functions */
 72 struct usbtouch_usb;
 73 struct usbtouch_device_info {
 74         int min_xc, max_xc;
 75         int min_yc, max_yc;
 76         int min_press, max_press;
 77         int rept_size;
 78 
 79         /*
 80          * Always service the USB devices irq not just when the input device is
 81          * open. This is useful when devices have a watchdog which prevents us
 82          * from periodically polling the device. Leave this unset unless your
 83          * touchscreen device requires it, as it does consume more of the USB
 84          * bandwidth.
 85          */
 86         bool irq_always;
 87 
 88         void (*process_pkt) (struct usbtouch_usb *usbtouch, unsigned char *pkt, int len);
 89 
 90         /*
 91          * used to get the packet len. possible return values:
 92          * > 0: packet len
 93          * = 0: skip one byte
 94          * < 0: -return value more bytes needed
 95          */
 96         int  (*get_pkt_len) (unsigned char *pkt, int len);
 97 
 98         int  (*read_data)   (struct usbtouch_usb *usbtouch, unsigned char *pkt);
 99         int  (*alloc)       (struct usbtouch_usb *usbtouch);
100         int  (*init)        (struct usbtouch_usb *usbtouch);
101         void (*exit)        (struct usbtouch_usb *usbtouch);
102 };
103 
104 /* a usbtouch device */
105 struct usbtouch_usb {
106         unsigned char *data;
107         dma_addr_t data_dma;
108         int data_size;
109         unsigned char *buffer;
110         int buf_len;
111         struct urb *irq;
112         struct usb_interface *interface;
113         struct input_dev *input;
114         struct usbtouch_device_info *type;
115         char name[128];
116         char phys[64];
117         void *priv;
118 
119         int x, y;
120         int touch, press;
121 };
122 
123 
124 /* device types */
125 enum {
126         DEVTYPE_IGNORE = -1,
127         DEVTYPE_EGALAX,
128         DEVTYPE_PANJIT,
129         DEVTYPE_3M,
130         DEVTYPE_ITM,
131         DEVTYPE_ETURBO,
132         DEVTYPE_GUNZE,
133         DEVTYPE_DMC_TSC10,
134         DEVTYPE_IRTOUCH,
135         DEVTYPE_IRTOUCH_HIRES,
136         DEVTYPE_IDEALTEK,
137         DEVTYPE_GENERAL_TOUCH,
138         DEVTYPE_GOTOP,
139         DEVTYPE_JASTEC,
140         DEVTYPE_E2I,
141         DEVTYPE_ZYTRONIC,
142         DEVTYPE_TC45USB,
143         DEVTYPE_NEXIO,
144         DEVTYPE_ELO,
145         DEVTYPE_ETOUCH,
146 };
147 
148 #define USB_DEVICE_HID_CLASS(vend, prod) \
149         .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS \
150                 | USB_DEVICE_ID_MATCH_DEVICE, \
151         .idVendor = (vend), \
152         .idProduct = (prod), \
153         .bInterfaceClass = USB_INTERFACE_CLASS_HID
154 
155 static const struct usb_device_id usbtouch_devices[] = {
156 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
157         /* ignore the HID capable devices, handled by usbhid */
158         {USB_DEVICE_HID_CLASS(0x0eef, 0x0001), .driver_info = DEVTYPE_IGNORE},
159         {USB_DEVICE_HID_CLASS(0x0eef, 0x0002), .driver_info = DEVTYPE_IGNORE},
160 
161         /* normal device IDs */
162         {USB_DEVICE(0x3823, 0x0001), .driver_info = DEVTYPE_EGALAX},
163         {USB_DEVICE(0x3823, 0x0002), .driver_info = DEVTYPE_EGALAX},
164         {USB_DEVICE(0x0123, 0x0001), .driver_info = DEVTYPE_EGALAX},
165         {USB_DEVICE(0x0eef, 0x0001), .driver_info = DEVTYPE_EGALAX},
166         {USB_DEVICE(0x0eef, 0x0002), .driver_info = DEVTYPE_EGALAX},
167         {USB_DEVICE(0x1234, 0x0001), .driver_info = DEVTYPE_EGALAX},
168         {USB_DEVICE(0x1234, 0x0002), .driver_info = DEVTYPE_EGALAX},
169 #endif
170 
171 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
172         {USB_DEVICE(0x134c, 0x0001), .driver_info = DEVTYPE_PANJIT},
173         {USB_DEVICE(0x134c, 0x0002), .driver_info = DEVTYPE_PANJIT},
174         {USB_DEVICE(0x134c, 0x0003), .driver_info = DEVTYPE_PANJIT},
175         {USB_DEVICE(0x134c, 0x0004), .driver_info = DEVTYPE_PANJIT},
176 #endif
177 
178 #ifdef CONFIG_TOUCHSCREEN_USB_3M
179         {USB_DEVICE(0x0596, 0x0001), .driver_info = DEVTYPE_3M},
180 #endif
181 
182 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
183         {USB_DEVICE(0x0403, 0xf9e9), .driver_info = DEVTYPE_ITM},
184         {USB_DEVICE(0x16e3, 0xf9e9), .driver_info = DEVTYPE_ITM},
185 #endif
186 
187 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
188         {USB_DEVICE(0x1234, 0x5678), .driver_info = DEVTYPE_ETURBO},
189 #endif
190 
191 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
192         {USB_DEVICE(0x0637, 0x0001), .driver_info = DEVTYPE_GUNZE},
193 #endif
194 
195 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
196         {USB_DEVICE(0x0afa, 0x03e8), .driver_info = DEVTYPE_DMC_TSC10},
197 #endif
198 
199 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
200         {USB_DEVICE(0x595a, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
201         {USB_DEVICE(0x6615, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
202         {USB_DEVICE(0x6615, 0x0012), .driver_info = DEVTYPE_IRTOUCH_HIRES},
203 #endif
204 
205 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
206         {USB_DEVICE(0x1391, 0x1000), .driver_info = DEVTYPE_IDEALTEK},
207 #endif
208 
209 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
210         {USB_DEVICE(0x0dfc, 0x0001), .driver_info = DEVTYPE_GENERAL_TOUCH},
211 #endif
212 
213 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
214         {USB_DEVICE(0x08f2, 0x007f), .driver_info = DEVTYPE_GOTOP},
215         {USB_DEVICE(0x08f2, 0x00ce), .driver_info = DEVTYPE_GOTOP},
216         {USB_DEVICE(0x08f2, 0x00f4), .driver_info = DEVTYPE_GOTOP},
217 #endif
218 
219 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
220         {USB_DEVICE(0x0f92, 0x0001), .driver_info = DEVTYPE_JASTEC},
221 #endif
222 
223 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
224         {USB_DEVICE(0x1ac7, 0x0001), .driver_info = DEVTYPE_E2I},
225 #endif
226 
227 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
228         {USB_DEVICE(0x14c8, 0x0003), .driver_info = DEVTYPE_ZYTRONIC},
229 #endif
230 
231 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
232         /* TC5UH */
233         {USB_DEVICE(0x0664, 0x0309), .driver_info = DEVTYPE_TC45USB},
234         /* TC4UM */
235         {USB_DEVICE(0x0664, 0x0306), .driver_info = DEVTYPE_TC45USB},
236 #endif
237 
238 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
239         /* data interface only */
240         {USB_DEVICE_AND_INTERFACE_INFO(0x10f0, 0x2002, 0x0a, 0x00, 0x00),
241                 .driver_info = DEVTYPE_NEXIO},
242         {USB_DEVICE_AND_INTERFACE_INFO(0x1870, 0x0001, 0x0a, 0x00, 0x00),
243                 .driver_info = DEVTYPE_NEXIO},
244 #endif
245 
246 #ifdef CONFIG_TOUCHSCREEN_USB_ELO
247         {USB_DEVICE(0x04e7, 0x0020), .driver_info = DEVTYPE_ELO},
248 #endif
249 
250 #ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
251         {USB_DEVICE(0x7374, 0x0001), .driver_info = DEVTYPE_ETOUCH},
252 #endif
253 
254         {}
255 };
256 
257 
258 /*****************************************************************************
259  * e2i Part
260  */
261 
262 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
263 static int e2i_init(struct usbtouch_usb *usbtouch)
264 {
265         int ret;
266         struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
267 
268         ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
269                               0x01, 0x02, 0x0000, 0x0081,
270                               NULL, 0, USB_CTRL_SET_TIMEOUT);
271 
272         dev_dbg(&usbtouch->interface->dev,
273                 "%s - usb_control_msg - E2I_RESET - bytes|err: %d\n",
274                 __func__, ret);
275         return ret;
276 }
277 
278 static int e2i_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
279 {
280         int tmp = (pkt[0] << 8) | pkt[1];
281         dev->x  = (pkt[2] << 8) | pkt[3];
282         dev->y  = (pkt[4] << 8) | pkt[5];
283 
284         tmp = tmp - 0xA000;
285         dev->touch = (tmp > 0);
286         dev->press = (tmp > 0 ? tmp : 0);
287 
288         return 1;
289 }
290 #endif
291 
292 
293 /*****************************************************************************
294  * eGalax part
295  */
296 
297 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
298 
299 #ifndef MULTI_PACKET
300 #define MULTI_PACKET
301 #endif
302 
303 #define EGALAX_PKT_TYPE_MASK            0xFE
304 #define EGALAX_PKT_TYPE_REPT            0x80
305 #define EGALAX_PKT_TYPE_DIAG            0x0A
306 
307 static int egalax_init(struct usbtouch_usb *usbtouch)
308 {
309         int ret, i;
310         unsigned char *buf;
311         struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
312 
313         /*
314          * An eGalax diagnostic packet kicks the device into using the right
315          * protocol.  We send a "check active" packet.  The response will be
316          * read later and ignored.
317          */
318 
319         buf = kmalloc(3, GFP_KERNEL);
320         if (!buf)
321                 return -ENOMEM;
322 
323         buf[0] = EGALAX_PKT_TYPE_DIAG;
324         buf[1] = 1;     /* length */
325         buf[2] = 'A';   /* command - check active */
326 
327         for (i = 0; i < 3; i++) {
328                 ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
329                                       0,
330                                       USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
331                                       0, 0, buf, 3,
332                                       USB_CTRL_SET_TIMEOUT);
333                 if (ret >= 0) {
334                         ret = 0;
335                         break;
336                 }
337                 if (ret != -EPIPE)
338                         break;
339         }
340 
341         kfree(buf);
342 
343         return ret;
344 }
345 
346 static int egalax_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
347 {
348         if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT)
349                 return 0;
350 
351         dev->x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F);
352         dev->y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F);
353         dev->touch = pkt[0] & 0x01;
354 
355         return 1;
356 }
357 
358 static int egalax_get_pkt_len(unsigned char *buf, int len)
359 {
360         switch (buf[0] & EGALAX_PKT_TYPE_MASK) {
361         case EGALAX_PKT_TYPE_REPT:
362                 return 5;
363 
364         case EGALAX_PKT_TYPE_DIAG:
365                 if (len < 2)
366                         return -1;
367 
368                 return buf[1] + 2;
369         }
370 
371         return 0;
372 }
373 #endif
374 
375 /*****************************************************************************
376  * EasyTouch part
377  */
378 
379 #ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
380 
381 #ifndef MULTI_PACKET
382 #define MULTI_PACKET
383 #endif
384 
385 #define ETOUCH_PKT_TYPE_MASK            0xFE
386 #define ETOUCH_PKT_TYPE_REPT            0x80
387 #define ETOUCH_PKT_TYPE_REPT2           0xB0
388 #define ETOUCH_PKT_TYPE_DIAG            0x0A
389 
390 static int etouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
391 {
392         if ((pkt[0] & ETOUCH_PKT_TYPE_MASK) != ETOUCH_PKT_TYPE_REPT &&
393                 (pkt[0] & ETOUCH_PKT_TYPE_MASK) != ETOUCH_PKT_TYPE_REPT2)
394                 return 0;
395 
396         dev->x = ((pkt[1] & 0x1F) << 7) | (pkt[2] & 0x7F);
397         dev->y = ((pkt[3] & 0x1F) << 7) | (pkt[4] & 0x7F);
398         dev->touch = pkt[0] & 0x01;
399 
400         return 1;
401 }
402 
403 static int etouch_get_pkt_len(unsigned char *buf, int len)
404 {
405         switch (buf[0] & ETOUCH_PKT_TYPE_MASK) {
406         case ETOUCH_PKT_TYPE_REPT:
407         case ETOUCH_PKT_TYPE_REPT2:
408                 return 5;
409 
410         case ETOUCH_PKT_TYPE_DIAG:
411                 if (len < 2)
412                         return -1;
413 
414                 return buf[1] + 2;
415         }
416 
417         return 0;
418 }
419 #endif
420 
421 /*****************************************************************************
422  * PanJit Part
423  */
424 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
425 static int panjit_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
426 {
427         dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
428         dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
429         dev->touch = pkt[0] & 0x01;
430 
431         return 1;
432 }
433 #endif
434 
435 
436 /*****************************************************************************
437  * 3M/Microtouch Part
438  */
439 #ifdef CONFIG_TOUCHSCREEN_USB_3M
440 
441 #define MTOUCHUSB_ASYNC_REPORT          1
442 #define MTOUCHUSB_RESET                 7
443 #define MTOUCHUSB_REQ_CTRLLR_ID         10
444 
445 static int mtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
446 {
447         if (hwcalib_xy) {
448                 dev->x = (pkt[4] << 8) | pkt[3];
449                 dev->y = 0xffff - ((pkt[6] << 8) | pkt[5]);
450         } else {
451                 dev->x = (pkt[8] << 8) | pkt[7];
452                 dev->y = (pkt[10] << 8) | pkt[9];
453         }
454         dev->touch = (pkt[2] & 0x40) ? 1 : 0;
455 
456         return 1;
457 }
458 
459 static int mtouch_init(struct usbtouch_usb *usbtouch)
460 {
461         int ret, i;
462         struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
463 
464         ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
465                               MTOUCHUSB_RESET,
466                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
467                               1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
468         dev_dbg(&usbtouch->interface->dev,
469                 "%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d\n",
470                 __func__, ret);
471         if (ret < 0)
472                 return ret;
473         msleep(150);
474 
475         for (i = 0; i < 3; i++) {
476                 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
477                                       MTOUCHUSB_ASYNC_REPORT,
478                                       USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
479                                       1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT);
480                 dev_dbg(&usbtouch->interface->dev,
481                         "%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d\n",
482                         __func__, ret);
483                 if (ret >= 0)
484                         break;
485                 if (ret != -EPIPE)
486                         return ret;
487         }
488 
489         /* Default min/max xy are the raw values, override if using hw-calib */
490         if (hwcalib_xy) {
491                 input_set_abs_params(usbtouch->input, ABS_X, 0, 0xffff, 0, 0);
492                 input_set_abs_params(usbtouch->input, ABS_Y, 0, 0xffff, 0, 0);
493         }
494 
495         return 0;
496 }
497 #endif
498 
499 
500 /*****************************************************************************
501  * ITM Part
502  */
503 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
504 static int itm_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
505 {
506         int touch;
507         /*
508          * ITM devices report invalid x/y data if not touched.
509          * if the screen was touched before but is not touched any more
510          * report touch as 0 with the last valid x/y data once. then stop
511          * reporting data until touched again.
512          */
513         dev->press = ((pkt[2] & 0x01) << 7) | (pkt[5] & 0x7F);
514 
515         touch = ~pkt[7] & 0x20;
516         if (!touch) {
517                 if (dev->touch) {
518                         dev->touch = 0;
519                         return 1;
520                 }
521 
522                 return 0;
523         }
524 
525         dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F);
526         dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F);
527         dev->touch = touch;
528 
529         return 1;
530 }
531 #endif
532 
533 
534 /*****************************************************************************
535  * eTurboTouch part
536  */
537 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
538 #ifndef MULTI_PACKET
539 #define MULTI_PACKET
540 #endif
541 static int eturbo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
542 {
543         unsigned int shift;
544 
545         /* packets should start with sync */
546         if (!(pkt[0] & 0x80))
547                 return 0;
548 
549         shift = (6 - (pkt[0] & 0x03));
550         dev->x = ((pkt[3] << 7) | pkt[4]) >> shift;
551         dev->y = ((pkt[1] << 7) | pkt[2]) >> shift;
552         dev->touch = (pkt[0] & 0x10) ? 1 : 0;
553 
554         return 1;
555 }
556 
557 static int eturbo_get_pkt_len(unsigned char *buf, int len)
558 {
559         if (buf[0] & 0x80)
560                 return 5;
561         if (buf[0] == 0x01)
562                 return 3;
563         return 0;
564 }
565 #endif
566 
567 
568 /*****************************************************************************
569  * Gunze part
570  */
571 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
572 static int gunze_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
573 {
574         if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80))
575                 return 0;
576 
577         dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F);
578         dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F);
579         dev->touch = pkt[0] & 0x20;
580 
581         return 1;
582 }
583 #endif
584 
585 /*****************************************************************************
586  * DMC TSC-10/25 Part
587  *
588  * Documentation about the controller and it's protocol can be found at
589  *   http://www.dmccoltd.com/files/controler/tsc10usb_pi_e.pdf
590  *   http://www.dmccoltd.com/files/controler/tsc25_usb_e.pdf
591  */
592 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
593 
594 /* supported data rates. currently using 130 */
595 #define TSC10_RATE_POINT        0x50
596 #define TSC10_RATE_30           0x40
597 #define TSC10_RATE_50           0x41
598 #define TSC10_RATE_80           0x42
599 #define TSC10_RATE_100          0x43
600 #define TSC10_RATE_130          0x44
601 #define TSC10_RATE_150          0x45
602 
603 /* commands */
604 #define TSC10_CMD_RESET         0x55
605 #define TSC10_CMD_RATE          0x05
606 #define TSC10_CMD_DATA1         0x01
607 
608 static int dmc_tsc10_init(struct usbtouch_usb *usbtouch)
609 {
610         struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
611         int ret = -ENOMEM;
612         unsigned char *buf;
613 
614         buf = kmalloc(2, GFP_NOIO);
615         if (!buf)
616                 goto err_nobuf;
617         /* reset */
618         buf[0] = buf[1] = 0xFF;
619         ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
620                               TSC10_CMD_RESET,
621                               USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
622                               0, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
623         if (ret < 0)
624                 goto err_out;
625         if (buf[0] != 0x06) {
626                 ret = -ENODEV;
627                 goto err_out;
628         }
629 
630         /* TSC-25 data sheet specifies a delay after the RESET command */
631         msleep(150);
632 
633         /* set coordinate output rate */
634         buf[0] = buf[1] = 0xFF;
635         ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
636                               TSC10_CMD_RATE,
637                               USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
638                               TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
639         if (ret < 0)
640                 goto err_out;
641         if ((buf[0] != 0x06) && (buf[0] != 0x15 || buf[1] != 0x01)) {
642                 ret = -ENODEV;
643                 goto err_out;
644         }
645 
646         /* start sending data */
647         ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
648                               TSC10_CMD_DATA1,
649                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
650                               0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
651 err_out:
652         kfree(buf);
653 err_nobuf:
654         return ret;
655 }
656 
657 
658 static int dmc_tsc10_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
659 {
660         dev->x = ((pkt[2] & 0x03) << 8) | pkt[1];
661         dev->y = ((pkt[4] & 0x03) << 8) | pkt[3];
662         dev->touch = pkt[0] & 0x01;
663 
664         return 1;
665 }
666 #endif
667 
668 
669 /*****************************************************************************
670  * IRTOUCH Part
671  */
672 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
673 static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
674 {
675         dev->x = (pkt[3] << 8) | pkt[2];
676         dev->y = (pkt[5] << 8) | pkt[4];
677         dev->touch = (pkt[1] & 0x03) ? 1 : 0;
678 
679         return 1;
680 }
681 #endif
682 
683 /*****************************************************************************
684  * ET&T TC5UH/TC4UM part
685  */
686 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
687 static int tc45usb_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
688 {
689         dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
690         dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
691         dev->touch = pkt[0] & 0x01;
692 
693         return 1;
694 }
695 #endif
696 
697 /*****************************************************************************
698  * IdealTEK URTC1000 Part
699  */
700 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
701 #ifndef MULTI_PACKET
702 #define MULTI_PACKET
703 #endif
704 static int idealtek_get_pkt_len(unsigned char *buf, int len)
705 {
706         if (buf[0] & 0x80)
707                 return 5;
708         if (buf[0] == 0x01)
709                 return len;
710         return 0;
711 }
712 
713 static int idealtek_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
714 {
715         switch (pkt[0] & 0x98) {
716         case 0x88:
717                 /* touch data in IdealTEK mode */
718                 dev->x = (pkt[1] << 5) | (pkt[2] >> 2);
719                 dev->y = (pkt[3] << 5) | (pkt[4] >> 2);
720                 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
721                 return 1;
722 
723         case 0x98:
724                 /* touch data in MT emulation mode */
725                 dev->x = (pkt[2] << 5) | (pkt[1] >> 2);
726                 dev->y = (pkt[4] << 5) | (pkt[3] >> 2);
727                 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
728                 return 1;
729 
730         default:
731                 return 0;
732         }
733 }
734 #endif
735 
736 /*****************************************************************************
737  * General Touch Part
738  */
739 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
740 static int general_touch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
741 {
742         dev->x = (pkt[2] << 8) | pkt[1];
743         dev->y = (pkt[4] << 8) | pkt[3];
744         dev->press = pkt[5] & 0xff;
745         dev->touch = pkt[0] & 0x01;
746 
747         return 1;
748 }
749 #endif
750 
751 /*****************************************************************************
752  * GoTop Part
753  */
754 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
755 static int gotop_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
756 {
757         dev->x = ((pkt[1] & 0x38) << 4) | pkt[2];
758         dev->y = ((pkt[1] & 0x07) << 7) | pkt[3];
759         dev->touch = pkt[0] & 0x01;
760 
761         return 1;
762 }
763 #endif
764 
765 /*****************************************************************************
766  * JASTEC Part
767  */
768 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
769 static int jastec_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
770 {
771         dev->x = ((pkt[0] & 0x3f) << 6) | (pkt[2] & 0x3f);
772         dev->y = ((pkt[1] & 0x3f) << 6) | (pkt[3] & 0x3f);
773         dev->touch = (pkt[0] & 0x40) >> 6;
774 
775         return 1;
776 }
777 #endif
778 
779 /*****************************************************************************
780  * Zytronic Part
781  */
782 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
783 static int zytronic_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
784 {
785         struct usb_interface *intf = dev->interface;
786 
787         switch (pkt[0]) {
788         case 0x3A: /* command response */
789                 dev_dbg(&intf->dev, "%s: Command response %d\n", __func__, pkt[1]);
790                 break;
791 
792         case 0xC0: /* down */
793                 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
794                 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
795                 dev->touch = 1;
796                 dev_dbg(&intf->dev, "%s: down %d,%d\n", __func__, dev->x, dev->y);
797                 return 1;
798 
799         case 0x80: /* up */
800                 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
801                 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
802                 dev->touch = 0;
803                 dev_dbg(&intf->dev, "%s: up %d,%d\n", __func__, dev->x, dev->y);
804                 return 1;
805 
806         default:
807                 dev_dbg(&intf->dev, "%s: Unknown return %d\n", __func__, pkt[0]);
808                 break;
809         }
810 
811         return 0;
812 }
813 #endif
814 
815 /*****************************************************************************
816  * NEXIO Part
817  */
818 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
819 
820 #define NEXIO_TIMEOUT   5000
821 #define NEXIO_BUFSIZE   1024
822 #define NEXIO_THRESHOLD 50
823 
824 struct nexio_priv {
825         struct urb *ack;
826         unsigned char *ack_buf;
827 };
828 
829 struct nexio_touch_packet {
830         u8      flags;          /* 0xe1 = touch, 0xe1 = release */
831         __be16  data_len;       /* total bytes of touch data */
832         __be16  x_len;          /* bytes for X axis */
833         __be16  y_len;          /* bytes for Y axis */
834         u8      data[];
835 } __attribute__ ((packed));
836 
837 static unsigned char nexio_ack_pkt[2] = { 0xaa, 0x02 };
838 static unsigned char nexio_init_pkt[4] = { 0x82, 0x04, 0x0a, 0x0f };
839 
840 static void nexio_ack_complete(struct urb *urb)
841 {
842 }
843 
844 static int nexio_alloc(struct usbtouch_usb *usbtouch)
845 {
846         struct nexio_priv *priv;
847         int ret = -ENOMEM;
848 
849         usbtouch->priv = kmalloc(sizeof(struct nexio_priv), GFP_KERNEL);
850         if (!usbtouch->priv)
851                 goto out_buf;
852 
853         priv = usbtouch->priv;
854 
855         priv->ack_buf = kmemdup(nexio_ack_pkt, sizeof(nexio_ack_pkt),
856                                 GFP_KERNEL);
857         if (!priv->ack_buf)
858                 goto err_priv;
859 
860         priv->ack = usb_alloc_urb(0, GFP_KERNEL);
861         if (!priv->ack) {
862                 dev_dbg(&usbtouch->interface->dev,
863                         "%s - usb_alloc_urb failed: usbtouch->ack\n", __func__);
864                 goto err_ack_buf;
865         }
866 
867         return 0;
868 
869 err_ack_buf:
870         kfree(priv->ack_buf);
871 err_priv:
872         kfree(priv);
873 out_buf:
874         return ret;
875 }
876 
877 static int nexio_init(struct usbtouch_usb *usbtouch)
878 {
879         struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
880         struct usb_host_interface *interface = usbtouch->interface->cur_altsetting;
881         struct nexio_priv *priv = usbtouch->priv;
882         int ret = -ENOMEM;
883         int actual_len, i;
884         unsigned char *buf;
885         char *firmware_ver = NULL, *device_name = NULL;
886         int input_ep = 0, output_ep = 0;
887 
888         /* find first input and output endpoint */
889         for (i = 0; i < interface->desc.bNumEndpoints; i++) {
890                 if (!input_ep &&
891                     usb_endpoint_dir_in(&interface->endpoint[i].desc))
892                         input_ep = interface->endpoint[i].desc.bEndpointAddress;
893                 if (!output_ep &&
894                     usb_endpoint_dir_out(&interface->endpoint[i].desc))
895                         output_ep = interface->endpoint[i].desc.bEndpointAddress;
896         }
897         if (!input_ep || !output_ep)
898                 return -ENXIO;
899 
900         buf = kmalloc(NEXIO_BUFSIZE, GFP_NOIO);
901         if (!buf)
902                 goto out_buf;
903 
904         /* two empty reads */
905         for (i = 0; i < 2; i++) {
906                 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
907                                    buf, NEXIO_BUFSIZE, &actual_len,
908                                    NEXIO_TIMEOUT);
909                 if (ret < 0)
910                         goto out_buf;
911         }
912 
913         /* send init command */
914         memcpy(buf, nexio_init_pkt, sizeof(nexio_init_pkt));
915         ret = usb_bulk_msg(dev, usb_sndbulkpipe(dev, output_ep),
916                            buf, sizeof(nexio_init_pkt), &actual_len,
917                            NEXIO_TIMEOUT);
918         if (ret < 0)
919                 goto out_buf;
920 
921         /* read replies */
922         for (i = 0; i < 3; i++) {
923                 memset(buf, 0, NEXIO_BUFSIZE);
924                 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
925                                    buf, NEXIO_BUFSIZE, &actual_len,
926                                    NEXIO_TIMEOUT);
927                 if (ret < 0 || actual_len < 1 || buf[1] != actual_len)
928                         continue;
929                 switch (buf[0]) {
930                 case 0x83:      /* firmware version */
931                         if (!firmware_ver)
932                                 firmware_ver = kstrdup(&buf[2], GFP_NOIO);
933                         break;
934                 case 0x84:      /* device name */
935                         if (!device_name)
936                                 device_name = kstrdup(&buf[2], GFP_NOIO);
937                         break;
938                 }
939         }
940 
941         printk(KERN_INFO "Nexio device: %s, firmware version: %s\n",
942                device_name, firmware_ver);
943 
944         kfree(firmware_ver);
945         kfree(device_name);
946 
947         usb_fill_bulk_urb(priv->ack, dev, usb_sndbulkpipe(dev, output_ep),
948                           priv->ack_buf, sizeof(nexio_ack_pkt),
949                           nexio_ack_complete, usbtouch);
950         ret = 0;
951 
952 out_buf:
953         kfree(buf);
954         return ret;
955 }
956 
957 static void nexio_exit(struct usbtouch_usb *usbtouch)
958 {
959         struct nexio_priv *priv = usbtouch->priv;
960 
961         usb_kill_urb(priv->ack);
962         usb_free_urb(priv->ack);
963         kfree(priv->ack_buf);
964         kfree(priv);
965 }
966 
967 static int nexio_read_data(struct usbtouch_usb *usbtouch, unsigned char *pkt)
968 {
969         struct nexio_touch_packet *packet = (void *) pkt;
970         struct nexio_priv *priv = usbtouch->priv;
971         unsigned int data_len = be16_to_cpu(packet->data_len);
972         unsigned int x_len = be16_to_cpu(packet->x_len);
973         unsigned int y_len = be16_to_cpu(packet->y_len);
974         int x, y, begin_x, begin_y, end_x, end_y, w, h, ret;
975 
976         /* got touch data? */
977         if ((pkt[0] & 0xe0) != 0xe0)
978                 return 0;
979 
980         if (data_len > 0xff)
981                 data_len -= 0x100;
982         if (x_len > 0xff)
983                 x_len -= 0x80;
984 
985         /* send ACK */
986         ret = usb_submit_urb(priv->ack, GFP_ATOMIC);
987 
988         if (!usbtouch->type->max_xc) {
989                 usbtouch->type->max_xc = 2 * x_len;
990                 input_set_abs_params(usbtouch->input, ABS_X,
991                                      0, usbtouch->type->max_xc, 0, 0);
992                 usbtouch->type->max_yc = 2 * y_len;
993                 input_set_abs_params(usbtouch->input, ABS_Y,
994                                      0, usbtouch->type->max_yc, 0, 0);
995         }
996         /*
997          * The device reports state of IR sensors on X and Y axes.
998          * Each byte represents "darkness" percentage (0-100) of one element.
999          * 17" touchscreen reports only 64 x 52 bytes so the resolution is low.
1000          * This also means that there's a limited multi-touch capability but
1001          * it's disabled (and untested) here as there's no X driver for that.
1002          */
1003         begin_x = end_x = begin_y = end_y = -1;
1004         for (x = 0; x < x_len; x++) {
1005                 if (begin_x == -1 && packet->data[x] > NEXIO_THRESHOLD) {
1006                         begin_x = x;
1007                         continue;
1008                 }
1009                 if (end_x == -1 && begin_x != -1 && packet->data[x] < NEXIO_THRESHOLD) {
1010                         end_x = x - 1;
1011                         for (y = x_len; y < data_len; y++) {
1012                                 if (begin_y == -1 && packet->data[y] > NEXIO_THRESHOLD) {
1013                                         begin_y = y - x_len;
1014                                         continue;
1015                                 }
1016                                 if (end_y == -1 &&
1017                                     begin_y != -1 && packet->data[y] < NEXIO_THRESHOLD) {
1018                                         end_y = y - 1 - x_len;
1019                                         w = end_x - begin_x;
1020                                         h = end_y - begin_y;
1021 #if 0
1022                                         /* multi-touch */
1023                                         input_report_abs(usbtouch->input,
1024                                                     ABS_MT_TOUCH_MAJOR, max(w,h));
1025                                         input_report_abs(usbtouch->input,
1026                                                     ABS_MT_TOUCH_MINOR, min(x,h));
1027                                         input_report_abs(usbtouch->input,
1028                                                     ABS_MT_POSITION_X, 2*begin_x+w);
1029                                         input_report_abs(usbtouch->input,
1030                                                     ABS_MT_POSITION_Y, 2*begin_y+h);
1031                                         input_report_abs(usbtouch->input,
1032                                                     ABS_MT_ORIENTATION, w > h);
1033                                         input_mt_sync(usbtouch->input);
1034 #endif
1035                                         /* single touch */
1036                                         usbtouch->x = 2 * begin_x + w;
1037                                         usbtouch->y = 2 * begin_y + h;
1038                                         usbtouch->touch = packet->flags & 0x01;
1039                                         begin_y = end_y = -1;
1040                                         return 1;
1041                                 }
1042                         }
1043                         begin_x = end_x = -1;
1044                 }
1045 
1046         }
1047         return 0;
1048 }
1049 #endif
1050 
1051 
1052 /*****************************************************************************
1053  * ELO part
1054  */
1055 
1056 #ifdef CONFIG_TOUCHSCREEN_USB_ELO
1057 
1058 static int elo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
1059 {
1060         dev->x = (pkt[3] << 8) | pkt[2];
1061         dev->y = (pkt[5] << 8) | pkt[4];
1062         dev->touch = pkt[6] > 0;
1063         dev->press = pkt[6];
1064 
1065         return 1;
1066 }
1067 #endif
1068 
1069 
1070 /*****************************************************************************
1071  * the different device descriptors
1072  */
1073 #ifdef MULTI_PACKET
1074 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1075                                    unsigned char *pkt, int len);
1076 #endif
1077 
1078 static struct usbtouch_device_info usbtouch_dev_info[] = {
1079 #ifdef CONFIG_TOUCHSCREEN_USB_ELO
1080         [DEVTYPE_ELO] = {
1081                 .min_xc         = 0x0,
1082                 .max_xc         = 0x0fff,
1083                 .min_yc         = 0x0,
1084                 .max_yc         = 0x0fff,
1085                 .max_press      = 0xff,
1086                 .rept_size      = 8,
1087                 .read_data      = elo_read_data,
1088         },
1089 #endif
1090 
1091 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
1092         [DEVTYPE_EGALAX] = {
1093                 .min_xc         = 0x0,
1094                 .max_xc         = 0x07ff,
1095                 .min_yc         = 0x0,
1096                 .max_yc         = 0x07ff,
1097                 .rept_size      = 16,
1098                 .process_pkt    = usbtouch_process_multi,
1099                 .get_pkt_len    = egalax_get_pkt_len,
1100                 .read_data      = egalax_read_data,
1101                 .init           = egalax_init,
1102         },
1103 #endif
1104 
1105 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
1106         [DEVTYPE_PANJIT] = {
1107                 .min_xc         = 0x0,
1108                 .max_xc         = 0x0fff,
1109                 .min_yc         = 0x0,
1110                 .max_yc         = 0x0fff,
1111                 .rept_size      = 8,
1112                 .read_data      = panjit_read_data,
1113         },
1114 #endif
1115 
1116 #ifdef CONFIG_TOUCHSCREEN_USB_3M
1117         [DEVTYPE_3M] = {
1118                 .min_xc         = 0x0,
1119                 .max_xc         = 0x4000,
1120                 .min_yc         = 0x0,
1121                 .max_yc         = 0x4000,
1122                 .rept_size      = 11,
1123                 .read_data      = mtouch_read_data,
1124                 .init           = mtouch_init,
1125         },
1126 #endif
1127 
1128 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
1129         [DEVTYPE_ITM] = {
1130                 .min_xc         = 0x0,
1131                 .max_xc         = 0x0fff,
1132                 .min_yc         = 0x0,
1133                 .max_yc         = 0x0fff,
1134                 .max_press      = 0xff,
1135                 .rept_size      = 8,
1136                 .read_data      = itm_read_data,
1137         },
1138 #endif
1139 
1140 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
1141         [DEVTYPE_ETURBO] = {
1142                 .min_xc         = 0x0,
1143                 .max_xc         = 0x07ff,
1144                 .min_yc         = 0x0,
1145                 .max_yc         = 0x07ff,
1146                 .rept_size      = 8,
1147                 .process_pkt    = usbtouch_process_multi,
1148                 .get_pkt_len    = eturbo_get_pkt_len,
1149                 .read_data      = eturbo_read_data,
1150         },
1151 #endif
1152 
1153 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
1154         [DEVTYPE_GUNZE] = {
1155                 .min_xc         = 0x0,
1156                 .max_xc         = 0x0fff,
1157                 .min_yc         = 0x0,
1158                 .max_yc         = 0x0fff,
1159                 .rept_size      = 4,
1160                 .read_data      = gunze_read_data,
1161         },
1162 #endif
1163 
1164 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
1165         [DEVTYPE_DMC_TSC10] = {
1166                 .min_xc         = 0x0,
1167                 .max_xc         = 0x03ff,
1168                 .min_yc         = 0x0,
1169                 .max_yc         = 0x03ff,
1170                 .rept_size      = 5,
1171                 .init           = dmc_tsc10_init,
1172                 .read_data      = dmc_tsc10_read_data,
1173         },
1174 #endif
1175 
1176 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
1177         [DEVTYPE_IRTOUCH] = {
1178                 .min_xc         = 0x0,
1179                 .max_xc         = 0x0fff,
1180                 .min_yc         = 0x0,
1181                 .max_yc         = 0x0fff,
1182                 .rept_size      = 8,
1183                 .read_data      = irtouch_read_data,
1184         },
1185 
1186         [DEVTYPE_IRTOUCH_HIRES] = {
1187                 .min_xc         = 0x0,
1188                 .max_xc         = 0x7fff,
1189                 .min_yc         = 0x0,
1190                 .max_yc         = 0x7fff,
1191                 .rept_size      = 8,
1192                 .read_data      = irtouch_read_data,
1193         },
1194 #endif
1195 
1196 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
1197         [DEVTYPE_IDEALTEK] = {
1198                 .min_xc         = 0x0,
1199                 .max_xc         = 0x0fff,
1200                 .min_yc         = 0x0,
1201                 .max_yc         = 0x0fff,
1202                 .rept_size      = 8,
1203                 .process_pkt    = usbtouch_process_multi,
1204                 .get_pkt_len    = idealtek_get_pkt_len,
1205                 .read_data      = idealtek_read_data,
1206         },
1207 #endif
1208 
1209 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
1210         [DEVTYPE_GENERAL_TOUCH] = {
1211                 .min_xc         = 0x0,
1212                 .max_xc         = 0x7fff,
1213                 .min_yc         = 0x0,
1214                 .max_yc         = 0x7fff,
1215                 .rept_size      = 7,
1216                 .read_data      = general_touch_read_data,
1217         },
1218 #endif
1219 
1220 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
1221         [DEVTYPE_GOTOP] = {
1222                 .min_xc         = 0x0,
1223                 .max_xc         = 0x03ff,
1224                 .min_yc         = 0x0,
1225                 .max_yc         = 0x03ff,
1226                 .rept_size      = 4,
1227                 .read_data      = gotop_read_data,
1228         },
1229 #endif
1230 
1231 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
1232         [DEVTYPE_JASTEC] = {
1233                 .min_xc         = 0x0,
1234                 .max_xc         = 0x0fff,
1235                 .min_yc         = 0x0,
1236                 .max_yc         = 0x0fff,
1237                 .rept_size      = 4,
1238                 .read_data      = jastec_read_data,
1239         },
1240 #endif
1241 
1242 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
1243         [DEVTYPE_E2I] = {
1244                 .min_xc         = 0x0,
1245                 .max_xc         = 0x7fff,
1246                 .min_yc         = 0x0,
1247                 .max_yc         = 0x7fff,
1248                 .rept_size      = 6,
1249                 .init           = e2i_init,
1250                 .read_data      = e2i_read_data,
1251         },
1252 #endif
1253 
1254 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
1255         [DEVTYPE_ZYTRONIC] = {
1256                 .min_xc         = 0x0,
1257                 .max_xc         = 0x03ff,
1258                 .min_yc         = 0x0,
1259                 .max_yc         = 0x03ff,
1260                 .rept_size      = 5,
1261                 .read_data      = zytronic_read_data,
1262                 .irq_always     = true,
1263         },
1264 #endif
1265 
1266 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
1267         [DEVTYPE_TC45USB] = {
1268                 .min_xc         = 0x0,
1269                 .max_xc         = 0x0fff,
1270                 .min_yc         = 0x0,
1271                 .max_yc         = 0x0fff,
1272                 .rept_size      = 5,
1273                 .read_data      = tc45usb_read_data,
1274         },
1275 #endif
1276 
1277 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
1278         [DEVTYPE_NEXIO] = {
1279                 .rept_size      = 1024,
1280                 .irq_always     = true,
1281                 .read_data      = nexio_read_data,
1282                 .alloc          = nexio_alloc,
1283                 .init           = nexio_init,
1284                 .exit           = nexio_exit,
1285         },
1286 #endif
1287 #ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
1288         [DEVTYPE_ETOUCH] = {
1289                 .min_xc         = 0x0,
1290                 .max_xc         = 0x07ff,
1291                 .min_yc         = 0x0,
1292                 .max_yc         = 0x07ff,
1293                 .rept_size      = 16,
1294                 .process_pkt    = usbtouch_process_multi,
1295                 .get_pkt_len    = etouch_get_pkt_len,
1296                 .read_data      = etouch_read_data,
1297         },
1298 #endif
1299 };
1300 
1301 
1302 /*****************************************************************************
1303  * Generic Part
1304  */
1305 static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
1306                                  unsigned char *pkt, int len)
1307 {
1308         struct usbtouch_device_info *type = usbtouch->type;
1309 
1310         if (!type->read_data(usbtouch, pkt))
1311                         return;
1312 
1313         input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch);
1314 
1315         if (swap_xy) {
1316                 input_report_abs(usbtouch->input, ABS_X, usbtouch->y);
1317                 input_report_abs(usbtouch->input, ABS_Y, usbtouch->x);
1318         } else {
1319                 input_report_abs(usbtouch->input, ABS_X, usbtouch->x);
1320                 input_report_abs(usbtouch->input, ABS_Y, usbtouch->y);
1321         }
1322         if (type->max_press)
1323                 input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press);
1324         input_sync(usbtouch->input);
1325 }
1326 
1327 
1328 #ifdef MULTI_PACKET
1329 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1330                                    unsigned char *pkt, int len)
1331 {
1332         unsigned char *buffer;
1333         int pkt_len, pos, buf_len, tmp;
1334 
1335         /* process buffer */
1336         if (unlikely(usbtouch->buf_len)) {
1337                 /* try to get size */
1338                 pkt_len = usbtouch->type->get_pkt_len(
1339                                 usbtouch->buffer, usbtouch->buf_len);
1340 
1341                 /* drop? */
1342                 if (unlikely(!pkt_len))
1343                         goto out_flush_buf;
1344 
1345                 /* need to append -pkt_len bytes before able to get size */
1346                 if (unlikely(pkt_len < 0)) {
1347                         int append = -pkt_len;
1348                         if (unlikely(append > len))
1349                                append = len;
1350                         if (usbtouch->buf_len + append >= usbtouch->type->rept_size)
1351                                 goto out_flush_buf;
1352                         memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append);
1353                         usbtouch->buf_len += append;
1354 
1355                         pkt_len = usbtouch->type->get_pkt_len(
1356                                         usbtouch->buffer, usbtouch->buf_len);
1357                         if (pkt_len < 0)
1358                                 return;
1359                 }
1360 
1361                 /* append */
1362                 tmp = pkt_len - usbtouch->buf_len;
1363                 if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size)
1364                         goto out_flush_buf;
1365                 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp);
1366                 usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len);
1367 
1368                 buffer = pkt + tmp;
1369                 buf_len = len - tmp;
1370         } else {
1371                 buffer = pkt;
1372                 buf_len = len;
1373         }
1374 
1375         /* loop over the received packet, process */
1376         pos = 0;
1377         while (pos < buf_len) {
1378                 /* get packet len */
1379                 pkt_len = usbtouch->type->get_pkt_len(buffer + pos,
1380                                                         buf_len - pos);
1381 
1382                 /* unknown packet: skip one byte */
1383                 if (unlikely(!pkt_len)) {
1384                         pos++;
1385                         continue;
1386                 }
1387 
1388                 /* full packet: process */
1389                 if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) {
1390                         usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len);
1391                 } else {
1392                         /* incomplete packet: save in buffer */
1393                         memcpy(usbtouch->buffer, buffer + pos, buf_len - pos);
1394                         usbtouch->buf_len = buf_len - pos;
1395                         return;
1396                 }
1397                 pos += pkt_len;
1398         }
1399 
1400 out_flush_buf:
1401         usbtouch->buf_len = 0;
1402         return;
1403 }
1404 #endif
1405 
1406 
1407 static void usbtouch_irq(struct urb *urb)
1408 {
1409         struct usbtouch_usb *usbtouch = urb->context;
1410         struct device *dev = &usbtouch->interface->dev;
1411         int retval;
1412 
1413         switch (urb->status) {
1414         case 0:
1415                 /* success */
1416                 break;
1417         case -ETIME:
1418                 /* this urb is timing out */
1419                 dev_dbg(dev,
1420                         "%s - urb timed out - was the device unplugged?\n",
1421                         __func__);
1422                 return;
1423         case -ECONNRESET:
1424         case -ENOENT:
1425         case -ESHUTDOWN:
1426         case -EPIPE:
1427                 /* this urb is terminated, clean up */
1428                 dev_dbg(dev, "%s - urb shutting down with status: %d\n",
1429                         __func__, urb->status);
1430                 return;
1431         default:
1432                 dev_dbg(dev, "%s - nonzero urb status received: %d\n",
1433                         __func__, urb->status);
1434                 goto exit;
1435         }
1436 
1437         usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length);
1438 
1439 exit:
1440         usb_mark_last_busy(interface_to_usbdev(usbtouch->interface));
1441         retval = usb_submit_urb(urb, GFP_ATOMIC);
1442         if (retval)
1443                 dev_err(dev, "%s - usb_submit_urb failed with result: %d\n",
1444                         __func__, retval);
1445 }
1446 
1447 static int usbtouch_open(struct input_dev *input)
1448 {
1449         struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1450         int r;
1451 
1452         usbtouch->irq->dev = interface_to_usbdev(usbtouch->interface);
1453 
1454         r = usb_autopm_get_interface(usbtouch->interface) ? -EIO : 0;
1455         if (r < 0)
1456                 goto out;
1457 
1458         if (!usbtouch->type->irq_always) {
1459                 if (usb_submit_urb(usbtouch->irq, GFP_KERNEL)) {
1460                         r = -EIO;
1461                         goto out_put;
1462                 }
1463         }
1464 
1465         usbtouch->interface->needs_remote_wakeup = 1;
1466 out_put:
1467         usb_autopm_put_interface(usbtouch->interface);
1468 out:
1469         return r;
1470 }
1471 
1472 static void usbtouch_close(struct input_dev *input)
1473 {
1474         struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1475         int r;
1476 
1477         if (!usbtouch->type->irq_always)
1478                 usb_kill_urb(usbtouch->irq);
1479         r = usb_autopm_get_interface(usbtouch->interface);
1480         usbtouch->interface->needs_remote_wakeup = 0;
1481         if (!r)
1482                 usb_autopm_put_interface(usbtouch->interface);
1483 }
1484 
1485 static int usbtouch_suspend
1486 (struct usb_interface *intf, pm_message_t message)
1487 {
1488         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1489 
1490         usb_kill_urb(usbtouch->irq);
1491 
1492         return 0;
1493 }
1494 
1495 static int usbtouch_resume(struct usb_interface *intf)
1496 {
1497         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1498         struct input_dev *input = usbtouch->input;
1499         int result = 0;
1500 
1501         mutex_lock(&input->mutex);
1502         if (input->users || usbtouch->type->irq_always)
1503                 result = usb_submit_urb(usbtouch->irq, GFP_NOIO);
1504         mutex_unlock(&input->mutex);
1505 
1506         return result;
1507 }
1508 
1509 static int usbtouch_reset_resume(struct usb_interface *intf)
1510 {
1511         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1512         struct input_dev *input = usbtouch->input;
1513         int err = 0;
1514 
1515         /* reinit the device */
1516         if (usbtouch->type->init) {
1517                 err = usbtouch->type->init(usbtouch);
1518                 if (err) {
1519                         dev_dbg(&intf->dev,
1520                                 "%s - type->init() failed, err: %d\n",
1521                                 __func__, err);
1522                         return err;
1523                 }
1524         }
1525 
1526         /* restart IO if needed */
1527         mutex_lock(&input->mutex);
1528         if (input->users)
1529                 err = usb_submit_urb(usbtouch->irq, GFP_NOIO);
1530         mutex_unlock(&input->mutex);
1531 
1532         return err;
1533 }
1534 
1535 static void usbtouch_free_buffers(struct usb_device *udev,
1536                                   struct usbtouch_usb *usbtouch)
1537 {
1538         usb_free_coherent(udev, usbtouch->data_size,
1539                           usbtouch->data, usbtouch->data_dma);
1540         kfree(usbtouch->buffer);
1541 }
1542 
1543 static struct usb_endpoint_descriptor *
1544 usbtouch_get_input_endpoint(struct usb_host_interface *interface)
1545 {
1546         int i;
1547 
1548         for (i = 0; i < interface->desc.bNumEndpoints; i++)
1549                 if (usb_endpoint_dir_in(&interface->endpoint[i].desc))
1550                         return &interface->endpoint[i].desc;
1551 
1552         return NULL;
1553 }
1554 
1555 static int usbtouch_probe(struct usb_interface *intf,
1556                           const struct usb_device_id *id)
1557 {
1558         struct usbtouch_usb *usbtouch;
1559         struct input_dev *input_dev;
1560         struct usb_endpoint_descriptor *endpoint;
1561         struct usb_device *udev = interface_to_usbdev(intf);
1562         struct usbtouch_device_info *type;
1563         int err = -ENOMEM;
1564 
1565         /* some devices are ignored */
1566         if (id->driver_info == DEVTYPE_IGNORE)
1567                 return -ENODEV;
1568 
1569         endpoint = usbtouch_get_input_endpoint(intf->cur_altsetting);
1570         if (!endpoint)
1571                 return -ENXIO;
1572 
1573         usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL);
1574         input_dev = input_allocate_device();
1575         if (!usbtouch || !input_dev)
1576                 goto out_free;
1577 
1578         type = &usbtouch_dev_info[id->driver_info];
1579         usbtouch->type = type;
1580         if (!type->process_pkt)
1581                 type->process_pkt = usbtouch_process_pkt;
1582 
1583         usbtouch->data_size = type->rept_size;
1584         if (type->get_pkt_len) {
1585                 /*
1586                  * When dealing with variable-length packets we should
1587                  * not request more than wMaxPacketSize bytes at once
1588                  * as we do not know if there is more data coming or
1589                  * we filled exactly wMaxPacketSize bytes and there is
1590                  * nothing else.
1591                  */
1592                 usbtouch->data_size = min(usbtouch->data_size,
1593                                           usb_endpoint_maxp(endpoint));
1594         }
1595 
1596         usbtouch->data = usb_alloc_coherent(udev, usbtouch->data_size,
1597                                             GFP_KERNEL, &usbtouch->data_dma);
1598         if (!usbtouch->data)
1599                 goto out_free;
1600 
1601         if (type->get_pkt_len) {
1602                 usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL);
1603                 if (!usbtouch->buffer)
1604                         goto out_free_buffers;
1605         }
1606 
1607         usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
1608         if (!usbtouch->irq) {
1609                 dev_dbg(&intf->dev,
1610                         "%s - usb_alloc_urb failed: usbtouch->irq\n", __func__);
1611                 goto out_free_buffers;
1612         }
1613 
1614         usbtouch->interface = intf;
1615         usbtouch->input = input_dev;
1616 
1617         if (udev->manufacturer)
1618                 strlcpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name));
1619 
1620         if (udev->product) {
1621                 if (udev->manufacturer)
1622                         strlcat(usbtouch->name, " ", sizeof(usbtouch->name));
1623                 strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name));
1624         }
1625 
1626         if (!strlen(usbtouch->name))
1627                 snprintf(usbtouch->name, sizeof(usbtouch->name),
1628                         "USB Touchscreen %04x:%04x",
1629                          le16_to_cpu(udev->descriptor.idVendor),
1630                          le16_to_cpu(udev->descriptor.idProduct));
1631 
1632         usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys));
1633         strlcat(usbtouch->phys, "/input0", sizeof(usbtouch->phys));
1634 
1635         input_dev->name = usbtouch->name;
1636         input_dev->phys = usbtouch->phys;
1637         usb_to_input_id(udev, &input_dev->id);
1638         input_dev->dev.parent = &intf->dev;
1639 
1640         input_set_drvdata(input_dev, usbtouch);
1641 
1642         input_dev->open = usbtouch_open;
1643         input_dev->close = usbtouch_close;
1644 
1645         input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
1646         input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
1647         input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0);
1648         input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0);
1649         if (type->max_press)
1650                 input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press,
1651                                      type->max_press, 0, 0);
1652 
1653         if (usb_endpoint_type(endpoint) == USB_ENDPOINT_XFER_INT)
1654                 usb_fill_int_urb(usbtouch->irq, udev,
1655                          usb_rcvintpipe(udev, endpoint->bEndpointAddress),
1656                          usbtouch->data, usbtouch->data_size,
1657                          usbtouch_irq, usbtouch, endpoint->bInterval);
1658         else
1659                 usb_fill_bulk_urb(usbtouch->irq, udev,
1660                          usb_rcvbulkpipe(udev, endpoint->bEndpointAddress),
1661                          usbtouch->data, usbtouch->data_size,
1662                          usbtouch_irq, usbtouch);
1663 
1664         usbtouch->irq->dev = udev;
1665         usbtouch->irq->transfer_dma = usbtouch->data_dma;
1666         usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1667 
1668         /* device specific allocations */
1669         if (type->alloc) {
1670                 err = type->alloc(usbtouch);
1671                 if (err) {
1672                         dev_dbg(&intf->dev,
1673                                 "%s - type->alloc() failed, err: %d\n",
1674                                 __func__, err);
1675                         goto out_free_urb;
1676                 }
1677         }
1678 
1679         /* device specific initialisation*/
1680         if (type->init) {
1681                 err = type->init(usbtouch);
1682                 if (err) {
1683                         dev_dbg(&intf->dev,
1684                                 "%s - type->init() failed, err: %d\n",
1685                                 __func__, err);
1686                         goto out_do_exit;
1687                 }
1688         }
1689 
1690         err = input_register_device(usbtouch->input);
1691         if (err) {
1692                 dev_dbg(&intf->dev,
1693                         "%s - input_register_device failed, err: %d\n",
1694                         __func__, err);
1695                 goto out_do_exit;
1696         }
1697 
1698         usb_set_intfdata(intf, usbtouch);
1699 
1700         if (usbtouch->type->irq_always) {
1701                 /* this can't fail */
1702                 usb_autopm_get_interface(intf);
1703                 err = usb_submit_urb(usbtouch->irq, GFP_KERNEL);
1704                 if (err) {
1705                         usb_autopm_put_interface(intf);
1706                         dev_err(&intf->dev,
1707                                 "%s - usb_submit_urb failed with result: %d\n",
1708                                 __func__, err);
1709                         goto out_unregister_input;
1710                 }
1711         }
1712 
1713         return 0;
1714 
1715 out_unregister_input:
1716         input_unregister_device(input_dev);
1717         input_dev = NULL;
1718 out_do_exit:
1719         if (type->exit)
1720                 type->exit(usbtouch);
1721 out_free_urb:
1722         usb_free_urb(usbtouch->irq);
1723 out_free_buffers:
1724         usbtouch_free_buffers(udev, usbtouch);
1725 out_free:
1726         input_free_device(input_dev);
1727         kfree(usbtouch);
1728         return err;
1729 }
1730 
1731 static void usbtouch_disconnect(struct usb_interface *intf)
1732 {
1733         struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1734 
1735         if (!usbtouch)
1736                 return;
1737 
1738         dev_dbg(&intf->dev,
1739                 "%s - usbtouch is initialized, cleaning up\n", __func__);
1740 
1741         usb_set_intfdata(intf, NULL);
1742         /* this will stop IO via close */
1743         input_unregister_device(usbtouch->input);
1744         usb_free_urb(usbtouch->irq);
1745         if (usbtouch->type->exit)
1746                 usbtouch->type->exit(usbtouch);
1747         usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch);
1748         kfree(usbtouch);
1749 }
1750 
1751 MODULE_DEVICE_TABLE(usb, usbtouch_devices);
1752 
1753 static struct usb_driver usbtouch_driver = {
1754         .name           = "usbtouchscreen",
1755         .probe          = usbtouch_probe,
1756         .disconnect     = usbtouch_disconnect,
1757         .suspend        = usbtouch_suspend,
1758         .resume         = usbtouch_resume,
1759         .reset_resume   = usbtouch_reset_resume,
1760         .id_table       = usbtouch_devices,
1761         .supports_autosuspend = 1,
1762 };
1763 
1764 module_usb_driver(usbtouch_driver);
1765 
1766 MODULE_AUTHOR(DRIVER_AUTHOR);
1767 MODULE_DESCRIPTION(DRIVER_DESC);
1768 MODULE_LICENSE("GPL");
1769 
1770 MODULE_ALIAS("touchkitusb");
1771 MODULE_ALIAS("itmtouch");
1772 MODULE_ALIAS("mtouchusb");
1773 

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