Version:  2.0.40 2.2.26 2.4.37 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18

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

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