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
e2i_init(struct usbtouch_usb * usbtouch)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
e2i_read_data(struct usbtouch_usb * dev,unsigned char * pkt)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
egalax_init(struct usbtouch_usb * usbtouch)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
egalax_read_data(struct usbtouch_usb * dev,unsigned char * pkt)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
egalax_get_pkt_len(unsigned char * buf,int len)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
etouch_read_data(struct usbtouch_usb * dev,unsigned char * pkt)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
etouch_get_pkt_len(unsigned char * buf,int len)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
panjit_read_data(struct usbtouch_usb * dev,unsigned char * pkt)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
mtouch_read_data(struct usbtouch_usb * dev,unsigned char * pkt)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
mtouch_init(struct usbtouch_usb * usbtouch)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
itm_read_data(struct usbtouch_usb * dev,unsigned char * pkt)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
eturbo_read_data(struct usbtouch_usb * dev,unsigned char * pkt)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
eturbo_get_pkt_len(unsigned char * buf,int len)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
gunze_read_data(struct usbtouch_usb * dev,unsigned char * pkt)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
dmc_tsc10_init(struct usbtouch_usb * usbtouch)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 /* TSC-25 data sheet specifies a delay after the RESET command */
629 msleep(150);
630
631 /* set coordinate output rate */
632 buf[0] = buf[1] = 0xFF;
633 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
634 TSC10_CMD_RATE,
635 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
636 TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
637 if (ret < 0)
638 goto err_out;
639 if ((buf[0] != 0x06) && (buf[0] != 0x15 || buf[1] != 0x01)) {
640 ret = -ENODEV;
641 goto err_out;
642 }
643
644 /* start sending data */
645 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
646 TSC10_CMD_DATA1,
647 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
648 0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
649 err_out:
650 kfree(buf);
651 err_nobuf:
652 return ret;
653 }
654
655
dmc_tsc10_read_data(struct usbtouch_usb * dev,unsigned char * pkt)656 static int dmc_tsc10_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
657 {
658 dev->x = ((pkt[2] & 0x03) << 8) | pkt[1];
659 dev->y = ((pkt[4] & 0x03) << 8) | pkt[3];
660 dev->touch = pkt[0] & 0x01;
661
662 return 1;
663 }
664 #endif
665
666
667 /*****************************************************************************
668 * IRTOUCH Part
669 */
670 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
irtouch_read_data(struct usbtouch_usb * dev,unsigned char * pkt)671 static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
672 {
673 dev->x = (pkt[3] << 8) | pkt[2];
674 dev->y = (pkt[5] << 8) | pkt[4];
675 dev->touch = (pkt[1] & 0x03) ? 1 : 0;
676
677 return 1;
678 }
679 #endif
680
681 /*****************************************************************************
682 * ET&T TC5UH/TC4UM part
683 */
684 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
tc45usb_read_data(struct usbtouch_usb * dev,unsigned char * pkt)685 static int tc45usb_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
686 {
687 dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
688 dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
689 dev->touch = pkt[0] & 0x01;
690
691 return 1;
692 }
693 #endif
694
695 /*****************************************************************************
696 * IdealTEK URTC1000 Part
697 */
698 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
699 #ifndef MULTI_PACKET
700 #define MULTI_PACKET
701 #endif
idealtek_get_pkt_len(unsigned char * buf,int len)702 static int idealtek_get_pkt_len(unsigned char *buf, int len)
703 {
704 if (buf[0] & 0x80)
705 return 5;
706 if (buf[0] == 0x01)
707 return len;
708 return 0;
709 }
710
idealtek_read_data(struct usbtouch_usb * dev,unsigned char * pkt)711 static int idealtek_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
712 {
713 switch (pkt[0] & 0x98) {
714 case 0x88:
715 /* touch data in IdealTEK mode */
716 dev->x = (pkt[1] << 5) | (pkt[2] >> 2);
717 dev->y = (pkt[3] << 5) | (pkt[4] >> 2);
718 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
719 return 1;
720
721 case 0x98:
722 /* touch data in MT emulation mode */
723 dev->x = (pkt[2] << 5) | (pkt[1] >> 2);
724 dev->y = (pkt[4] << 5) | (pkt[3] >> 2);
725 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
726 return 1;
727
728 default:
729 return 0;
730 }
731 }
732 #endif
733
734 /*****************************************************************************
735 * General Touch Part
736 */
737 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
general_touch_read_data(struct usbtouch_usb * dev,unsigned char * pkt)738 static int general_touch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
739 {
740 dev->x = (pkt[2] << 8) | pkt[1];
741 dev->y = (pkt[4] << 8) | pkt[3];
742 dev->press = pkt[5] & 0xff;
743 dev->touch = pkt[0] & 0x01;
744
745 return 1;
746 }
747 #endif
748
749 /*****************************************************************************
750 * GoTop Part
751 */
752 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
gotop_read_data(struct usbtouch_usb * dev,unsigned char * pkt)753 static int gotop_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
754 {
755 dev->x = ((pkt[1] & 0x38) << 4) | pkt[2];
756 dev->y = ((pkt[1] & 0x07) << 7) | pkt[3];
757 dev->touch = pkt[0] & 0x01;
758
759 return 1;
760 }
761 #endif
762
763 /*****************************************************************************
764 * JASTEC Part
765 */
766 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
jastec_read_data(struct usbtouch_usb * dev,unsigned char * pkt)767 static int jastec_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
768 {
769 dev->x = ((pkt[0] & 0x3f) << 6) | (pkt[2] & 0x3f);
770 dev->y = ((pkt[1] & 0x3f) << 6) | (pkt[3] & 0x3f);
771 dev->touch = (pkt[0] & 0x40) >> 6;
772
773 return 1;
774 }
775 #endif
776
777 /*****************************************************************************
778 * Zytronic Part
779 */
780 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
zytronic_read_data(struct usbtouch_usb * dev,unsigned char * pkt)781 static int zytronic_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
782 {
783 struct usb_interface *intf = dev->interface;
784
785 switch (pkt[0]) {
786 case 0x3A: /* command response */
787 dev_dbg(&intf->dev, "%s: Command response %d\n", __func__, pkt[1]);
788 break;
789
790 case 0xC0: /* down */
791 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
792 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
793 dev->touch = 1;
794 dev_dbg(&intf->dev, "%s: down %d,%d\n", __func__, dev->x, dev->y);
795 return 1;
796
797 case 0x80: /* up */
798 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
799 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
800 dev->touch = 0;
801 dev_dbg(&intf->dev, "%s: up %d,%d\n", __func__, dev->x, dev->y);
802 return 1;
803
804 default:
805 dev_dbg(&intf->dev, "%s: Unknown return %d\n", __func__, pkt[0]);
806 break;
807 }
808
809 return 0;
810 }
811 #endif
812
813 /*****************************************************************************
814 * NEXIO Part
815 */
816 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
817
818 #define NEXIO_TIMEOUT 5000
819 #define NEXIO_BUFSIZE 1024
820 #define NEXIO_THRESHOLD 50
821
822 struct nexio_priv {
823 struct urb *ack;
824 unsigned char *ack_buf;
825 };
826
827 struct nexio_touch_packet {
828 u8 flags; /* 0xe1 = touch, 0xe1 = release */
829 __be16 data_len; /* total bytes of touch data */
830 __be16 x_len; /* bytes for X axis */
831 __be16 y_len; /* bytes for Y axis */
832 u8 data[];
833 } __attribute__ ((packed));
834
835 static unsigned char nexio_ack_pkt[2] = { 0xaa, 0x02 };
836 static unsigned char nexio_init_pkt[4] = { 0x82, 0x04, 0x0a, 0x0f };
837
nexio_ack_complete(struct urb * urb)838 static void nexio_ack_complete(struct urb *urb)
839 {
840 }
841
nexio_alloc(struct usbtouch_usb * usbtouch)842 static int nexio_alloc(struct usbtouch_usb *usbtouch)
843 {
844 struct nexio_priv *priv;
845 int ret = -ENOMEM;
846
847 usbtouch->priv = kmalloc(sizeof(struct nexio_priv), GFP_KERNEL);
848 if (!usbtouch->priv)
849 goto out_buf;
850
851 priv = usbtouch->priv;
852
853 priv->ack_buf = kmemdup(nexio_ack_pkt, sizeof(nexio_ack_pkt),
854 GFP_KERNEL);
855 if (!priv->ack_buf)
856 goto err_priv;
857
858 priv->ack = usb_alloc_urb(0, GFP_KERNEL);
859 if (!priv->ack) {
860 dev_dbg(&usbtouch->interface->dev,
861 "%s - usb_alloc_urb failed: usbtouch->ack\n", __func__);
862 goto err_ack_buf;
863 }
864
865 return 0;
866
867 err_ack_buf:
868 kfree(priv->ack_buf);
869 err_priv:
870 kfree(priv);
871 out_buf:
872 return ret;
873 }
874
nexio_init(struct usbtouch_usb * usbtouch)875 static int nexio_init(struct usbtouch_usb *usbtouch)
876 {
877 struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
878 struct usb_host_interface *interface = usbtouch->interface->cur_altsetting;
879 struct nexio_priv *priv = usbtouch->priv;
880 int ret = -ENOMEM;
881 int actual_len, i;
882 unsigned char *buf;
883 char *firmware_ver = NULL, *device_name = NULL;
884 int input_ep = 0, output_ep = 0;
885
886 /* find first input and output endpoint */
887 for (i = 0; i < interface->desc.bNumEndpoints; i++) {
888 if (!input_ep &&
889 usb_endpoint_dir_in(&interface->endpoint[i].desc))
890 input_ep = interface->endpoint[i].desc.bEndpointAddress;
891 if (!output_ep &&
892 usb_endpoint_dir_out(&interface->endpoint[i].desc))
893 output_ep = interface->endpoint[i].desc.bEndpointAddress;
894 }
895 if (!input_ep || !output_ep)
896 return -ENXIO;
897
898 buf = kmalloc(NEXIO_BUFSIZE, GFP_NOIO);
899 if (!buf)
900 goto out_buf;
901
902 /* two empty reads */
903 for (i = 0; i < 2; i++) {
904 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
905 buf, NEXIO_BUFSIZE, &actual_len,
906 NEXIO_TIMEOUT);
907 if (ret < 0)
908 goto out_buf;
909 }
910
911 /* send init command */
912 memcpy(buf, nexio_init_pkt, sizeof(nexio_init_pkt));
913 ret = usb_bulk_msg(dev, usb_sndbulkpipe(dev, output_ep),
914 buf, sizeof(nexio_init_pkt), &actual_len,
915 NEXIO_TIMEOUT);
916 if (ret < 0)
917 goto out_buf;
918
919 /* read replies */
920 for (i = 0; i < 3; i++) {
921 memset(buf, 0, NEXIO_BUFSIZE);
922 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
923 buf, NEXIO_BUFSIZE, &actual_len,
924 NEXIO_TIMEOUT);
925 if (ret < 0 || actual_len < 1 || buf[1] != actual_len)
926 continue;
927 switch (buf[0]) {
928 case 0x83: /* firmware version */
929 if (!firmware_ver)
930 firmware_ver = kstrdup(&buf[2], GFP_NOIO);
931 break;
932 case 0x84: /* device name */
933 if (!device_name)
934 device_name = kstrdup(&buf[2], GFP_NOIO);
935 break;
936 }
937 }
938
939 printk(KERN_INFO "Nexio device: %s, firmware version: %s\n",
940 device_name, firmware_ver);
941
942 kfree(firmware_ver);
943 kfree(device_name);
944
945 usb_fill_bulk_urb(priv->ack, dev, usb_sndbulkpipe(dev, output_ep),
946 priv->ack_buf, sizeof(nexio_ack_pkt),
947 nexio_ack_complete, usbtouch);
948 ret = 0;
949
950 out_buf:
951 kfree(buf);
952 return ret;
953 }
954
nexio_exit(struct usbtouch_usb * usbtouch)955 static void nexio_exit(struct usbtouch_usb *usbtouch)
956 {
957 struct nexio_priv *priv = usbtouch->priv;
958
959 usb_kill_urb(priv->ack);
960 usb_free_urb(priv->ack);
961 kfree(priv->ack_buf);
962 kfree(priv);
963 }
964
nexio_read_data(struct usbtouch_usb * usbtouch,unsigned char * pkt)965 static int nexio_read_data(struct usbtouch_usb *usbtouch, unsigned char *pkt)
966 {
967 struct nexio_touch_packet *packet = (void *) pkt;
968 struct nexio_priv *priv = usbtouch->priv;
969 unsigned int data_len = be16_to_cpu(packet->data_len);
970 unsigned int x_len = be16_to_cpu(packet->x_len);
971 unsigned int y_len = be16_to_cpu(packet->y_len);
972 int x, y, begin_x, begin_y, end_x, end_y, w, h, ret;
973
974 /* got touch data? */
975 if ((pkt[0] & 0xe0) != 0xe0)
976 return 0;
977
978 if (data_len > 0xff)
979 data_len -= 0x100;
980 if (x_len > 0xff)
981 x_len -= 0x80;
982
983 /* send ACK */
984 ret = usb_submit_urb(priv->ack, GFP_ATOMIC);
985
986 if (!usbtouch->type->max_xc) {
987 usbtouch->type->max_xc = 2 * x_len;
988 input_set_abs_params(usbtouch->input, ABS_X,
989 0, usbtouch->type->max_xc, 0, 0);
990 usbtouch->type->max_yc = 2 * y_len;
991 input_set_abs_params(usbtouch->input, ABS_Y,
992 0, usbtouch->type->max_yc, 0, 0);
993 }
994 /*
995 * The device reports state of IR sensors on X and Y axes.
996 * Each byte represents "darkness" percentage (0-100) of one element.
997 * 17" touchscreen reports only 64 x 52 bytes so the resolution is low.
998 * This also means that there's a limited multi-touch capability but
999 * it's disabled (and untested) here as there's no X driver for that.
1000 */
1001 begin_x = end_x = begin_y = end_y = -1;
1002 for (x = 0; x < x_len; x++) {
1003 if (begin_x == -1 && packet->data[x] > NEXIO_THRESHOLD) {
1004 begin_x = x;
1005 continue;
1006 }
1007 if (end_x == -1 && begin_x != -1 && packet->data[x] < NEXIO_THRESHOLD) {
1008 end_x = x - 1;
1009 for (y = x_len; y < data_len; y++) {
1010 if (begin_y == -1 && packet->data[y] > NEXIO_THRESHOLD) {
1011 begin_y = y - x_len;
1012 continue;
1013 }
1014 if (end_y == -1 &&
1015 begin_y != -1 && packet->data[y] < NEXIO_THRESHOLD) {
1016 end_y = y - 1 - x_len;
1017 w = end_x - begin_x;
1018 h = end_y - begin_y;
1019 #if 0
1020 /* multi-touch */
1021 input_report_abs(usbtouch->input,
1022 ABS_MT_TOUCH_MAJOR, max(w,h));
1023 input_report_abs(usbtouch->input,
1024 ABS_MT_TOUCH_MINOR, min(x,h));
1025 input_report_abs(usbtouch->input,
1026 ABS_MT_POSITION_X, 2*begin_x+w);
1027 input_report_abs(usbtouch->input,
1028 ABS_MT_POSITION_Y, 2*begin_y+h);
1029 input_report_abs(usbtouch->input,
1030 ABS_MT_ORIENTATION, w > h);
1031 input_mt_sync(usbtouch->input);
1032 #endif
1033 /* single touch */
1034 usbtouch->x = 2 * begin_x + w;
1035 usbtouch->y = 2 * begin_y + h;
1036 usbtouch->touch = packet->flags & 0x01;
1037 begin_y = end_y = -1;
1038 return 1;
1039 }
1040 }
1041 begin_x = end_x = -1;
1042 }
1043
1044 }
1045 return 0;
1046 }
1047 #endif
1048
1049
1050 /*****************************************************************************
1051 * ELO part
1052 */
1053
1054 #ifdef CONFIG_TOUCHSCREEN_USB_ELO
1055
elo_read_data(struct usbtouch_usb * dev,unsigned char * pkt)1056 static int elo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
1057 {
1058 dev->x = (pkt[3] << 8) | pkt[2];
1059 dev->y = (pkt[5] << 8) | pkt[4];
1060 dev->touch = pkt[6] > 0;
1061 dev->press = pkt[6];
1062
1063 return 1;
1064 }
1065 #endif
1066
1067
1068 /*****************************************************************************
1069 * the different device descriptors
1070 */
1071 #ifdef MULTI_PACKET
1072 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1073 unsigned char *pkt, int len);
1074 #endif
1075
1076 static struct usbtouch_device_info usbtouch_dev_info[] = {
1077 #ifdef CONFIG_TOUCHSCREEN_USB_ELO
1078 [DEVTYPE_ELO] = {
1079 .min_xc = 0x0,
1080 .max_xc = 0x0fff,
1081 .min_yc = 0x0,
1082 .max_yc = 0x0fff,
1083 .max_press = 0xff,
1084 .rept_size = 8,
1085 .read_data = elo_read_data,
1086 },
1087 #endif
1088
1089 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
1090 [DEVTYPE_EGALAX] = {
1091 .min_xc = 0x0,
1092 .max_xc = 0x07ff,
1093 .min_yc = 0x0,
1094 .max_yc = 0x07ff,
1095 .rept_size = 16,
1096 .process_pkt = usbtouch_process_multi,
1097 .get_pkt_len = egalax_get_pkt_len,
1098 .read_data = egalax_read_data,
1099 .init = egalax_init,
1100 },
1101 #endif
1102
1103 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
1104 [DEVTYPE_PANJIT] = {
1105 .min_xc = 0x0,
1106 .max_xc = 0x0fff,
1107 .min_yc = 0x0,
1108 .max_yc = 0x0fff,
1109 .rept_size = 8,
1110 .read_data = panjit_read_data,
1111 },
1112 #endif
1113
1114 #ifdef CONFIG_TOUCHSCREEN_USB_3M
1115 [DEVTYPE_3M] = {
1116 .min_xc = 0x0,
1117 .max_xc = 0x4000,
1118 .min_yc = 0x0,
1119 .max_yc = 0x4000,
1120 .rept_size = 11,
1121 .read_data = mtouch_read_data,
1122 .init = mtouch_init,
1123 },
1124 #endif
1125
1126 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
1127 [DEVTYPE_ITM] = {
1128 .min_xc = 0x0,
1129 .max_xc = 0x0fff,
1130 .min_yc = 0x0,
1131 .max_yc = 0x0fff,
1132 .max_press = 0xff,
1133 .rept_size = 8,
1134 .read_data = itm_read_data,
1135 },
1136 #endif
1137
1138 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
1139 [DEVTYPE_ETURBO] = {
1140 .min_xc = 0x0,
1141 .max_xc = 0x07ff,
1142 .min_yc = 0x0,
1143 .max_yc = 0x07ff,
1144 .rept_size = 8,
1145 .process_pkt = usbtouch_process_multi,
1146 .get_pkt_len = eturbo_get_pkt_len,
1147 .read_data = eturbo_read_data,
1148 },
1149 #endif
1150
1151 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
1152 [DEVTYPE_GUNZE] = {
1153 .min_xc = 0x0,
1154 .max_xc = 0x0fff,
1155 .min_yc = 0x0,
1156 .max_yc = 0x0fff,
1157 .rept_size = 4,
1158 .read_data = gunze_read_data,
1159 },
1160 #endif
1161
1162 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
1163 [DEVTYPE_DMC_TSC10] = {
1164 .min_xc = 0x0,
1165 .max_xc = 0x03ff,
1166 .min_yc = 0x0,
1167 .max_yc = 0x03ff,
1168 .rept_size = 5,
1169 .init = dmc_tsc10_init,
1170 .read_data = dmc_tsc10_read_data,
1171 },
1172 #endif
1173
1174 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
1175 [DEVTYPE_IRTOUCH] = {
1176 .min_xc = 0x0,
1177 .max_xc = 0x0fff,
1178 .min_yc = 0x0,
1179 .max_yc = 0x0fff,
1180 .rept_size = 8,
1181 .read_data = irtouch_read_data,
1182 },
1183 #endif
1184
1185 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
1186 [DEVTYPE_IDEALTEK] = {
1187 .min_xc = 0x0,
1188 .max_xc = 0x0fff,
1189 .min_yc = 0x0,
1190 .max_yc = 0x0fff,
1191 .rept_size = 8,
1192 .process_pkt = usbtouch_process_multi,
1193 .get_pkt_len = idealtek_get_pkt_len,
1194 .read_data = idealtek_read_data,
1195 },
1196 #endif
1197
1198 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
1199 [DEVTYPE_GENERAL_TOUCH] = {
1200 .min_xc = 0x0,
1201 .max_xc = 0x7fff,
1202 .min_yc = 0x0,
1203 .max_yc = 0x7fff,
1204 .rept_size = 7,
1205 .read_data = general_touch_read_data,
1206 },
1207 #endif
1208
1209 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
1210 [DEVTYPE_GOTOP] = {
1211 .min_xc = 0x0,
1212 .max_xc = 0x03ff,
1213 .min_yc = 0x0,
1214 .max_yc = 0x03ff,
1215 .rept_size = 4,
1216 .read_data = gotop_read_data,
1217 },
1218 #endif
1219
1220 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
1221 [DEVTYPE_JASTEC] = {
1222 .min_xc = 0x0,
1223 .max_xc = 0x0fff,
1224 .min_yc = 0x0,
1225 .max_yc = 0x0fff,
1226 .rept_size = 4,
1227 .read_data = jastec_read_data,
1228 },
1229 #endif
1230
1231 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
1232 [DEVTYPE_E2I] = {
1233 .min_xc = 0x0,
1234 .max_xc = 0x7fff,
1235 .min_yc = 0x0,
1236 .max_yc = 0x7fff,
1237 .rept_size = 6,
1238 .init = e2i_init,
1239 .read_data = e2i_read_data,
1240 },
1241 #endif
1242
1243 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
1244 [DEVTYPE_ZYTRONIC] = {
1245 .min_xc = 0x0,
1246 .max_xc = 0x03ff,
1247 .min_yc = 0x0,
1248 .max_yc = 0x03ff,
1249 .rept_size = 5,
1250 .read_data = zytronic_read_data,
1251 .irq_always = true,
1252 },
1253 #endif
1254
1255 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
1256 [DEVTYPE_TC45USB] = {
1257 .min_xc = 0x0,
1258 .max_xc = 0x0fff,
1259 .min_yc = 0x0,
1260 .max_yc = 0x0fff,
1261 .rept_size = 5,
1262 .read_data = tc45usb_read_data,
1263 },
1264 #endif
1265
1266 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
1267 [DEVTYPE_NEXIO] = {
1268 .rept_size = 1024,
1269 .irq_always = true,
1270 .read_data = nexio_read_data,
1271 .alloc = nexio_alloc,
1272 .init = nexio_init,
1273 .exit = nexio_exit,
1274 },
1275 #endif
1276 #ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
1277 [DEVTYPE_ETOUCH] = {
1278 .min_xc = 0x0,
1279 .max_xc = 0x07ff,
1280 .min_yc = 0x0,
1281 .max_yc = 0x07ff,
1282 .rept_size = 16,
1283 .process_pkt = usbtouch_process_multi,
1284 .get_pkt_len = etouch_get_pkt_len,
1285 .read_data = etouch_read_data,
1286 },
1287 #endif
1288 };
1289
1290
1291 /*****************************************************************************
1292 * Generic Part
1293 */
usbtouch_process_pkt(struct usbtouch_usb * usbtouch,unsigned char * pkt,int len)1294 static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
1295 unsigned char *pkt, int len)
1296 {
1297 struct usbtouch_device_info *type = usbtouch->type;
1298
1299 if (!type->read_data(usbtouch, pkt))
1300 return;
1301
1302 input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch);
1303
1304 if (swap_xy) {
1305 input_report_abs(usbtouch->input, ABS_X, usbtouch->y);
1306 input_report_abs(usbtouch->input, ABS_Y, usbtouch->x);
1307 } else {
1308 input_report_abs(usbtouch->input, ABS_X, usbtouch->x);
1309 input_report_abs(usbtouch->input, ABS_Y, usbtouch->y);
1310 }
1311 if (type->max_press)
1312 input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press);
1313 input_sync(usbtouch->input);
1314 }
1315
1316
1317 #ifdef MULTI_PACKET
usbtouch_process_multi(struct usbtouch_usb * usbtouch,unsigned char * pkt,int len)1318 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1319 unsigned char *pkt, int len)
1320 {
1321 unsigned char *buffer;
1322 int pkt_len, pos, buf_len, tmp;
1323
1324 /* process buffer */
1325 if (unlikely(usbtouch->buf_len)) {
1326 /* try to get size */
1327 pkt_len = usbtouch->type->get_pkt_len(
1328 usbtouch->buffer, usbtouch->buf_len);
1329
1330 /* drop? */
1331 if (unlikely(!pkt_len))
1332 goto out_flush_buf;
1333
1334 /* need to append -pkt_len bytes before able to get size */
1335 if (unlikely(pkt_len < 0)) {
1336 int append = -pkt_len;
1337 if (unlikely(append > len))
1338 append = len;
1339 if (usbtouch->buf_len + append >= usbtouch->type->rept_size)
1340 goto out_flush_buf;
1341 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append);
1342 usbtouch->buf_len += append;
1343
1344 pkt_len = usbtouch->type->get_pkt_len(
1345 usbtouch->buffer, usbtouch->buf_len);
1346 if (pkt_len < 0)
1347 return;
1348 }
1349
1350 /* append */
1351 tmp = pkt_len - usbtouch->buf_len;
1352 if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size)
1353 goto out_flush_buf;
1354 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp);
1355 usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len);
1356
1357 buffer = pkt + tmp;
1358 buf_len = len - tmp;
1359 } else {
1360 buffer = pkt;
1361 buf_len = len;
1362 }
1363
1364 /* loop over the received packet, process */
1365 pos = 0;
1366 while (pos < buf_len) {
1367 /* get packet len */
1368 pkt_len = usbtouch->type->get_pkt_len(buffer + pos,
1369 buf_len - pos);
1370
1371 /* unknown packet: skip one byte */
1372 if (unlikely(!pkt_len)) {
1373 pos++;
1374 continue;
1375 }
1376
1377 /* full packet: process */
1378 if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) {
1379 usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len);
1380 } else {
1381 /* incomplete packet: save in buffer */
1382 memcpy(usbtouch->buffer, buffer + pos, buf_len - pos);
1383 usbtouch->buf_len = buf_len - pos;
1384 return;
1385 }
1386 pos += pkt_len;
1387 }
1388
1389 out_flush_buf:
1390 usbtouch->buf_len = 0;
1391 return;
1392 }
1393 #endif
1394
1395
usbtouch_irq(struct urb * urb)1396 static void usbtouch_irq(struct urb *urb)
1397 {
1398 struct usbtouch_usb *usbtouch = urb->context;
1399 struct device *dev = &usbtouch->interface->dev;
1400 int retval;
1401
1402 switch (urb->status) {
1403 case 0:
1404 /* success */
1405 break;
1406 case -ETIME:
1407 /* this urb is timing out */
1408 dev_dbg(dev,
1409 "%s - urb timed out - was the device unplugged?\n",
1410 __func__);
1411 return;
1412 case -ECONNRESET:
1413 case -ENOENT:
1414 case -ESHUTDOWN:
1415 case -EPIPE:
1416 /* this urb is terminated, clean up */
1417 dev_dbg(dev, "%s - urb shutting down with status: %d\n",
1418 __func__, urb->status);
1419 return;
1420 default:
1421 dev_dbg(dev, "%s - nonzero urb status received: %d\n",
1422 __func__, urb->status);
1423 goto exit;
1424 }
1425
1426 usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length);
1427
1428 exit:
1429 usb_mark_last_busy(interface_to_usbdev(usbtouch->interface));
1430 retval = usb_submit_urb(urb, GFP_ATOMIC);
1431 if (retval)
1432 dev_err(dev, "%s - usb_submit_urb failed with result: %d\n",
1433 __func__, retval);
1434 }
1435
usbtouch_open(struct input_dev * input)1436 static int usbtouch_open(struct input_dev *input)
1437 {
1438 struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1439 int r;
1440
1441 usbtouch->irq->dev = interface_to_usbdev(usbtouch->interface);
1442
1443 r = usb_autopm_get_interface(usbtouch->interface) ? -EIO : 0;
1444 if (r < 0)
1445 goto out;
1446
1447 if (!usbtouch->type->irq_always) {
1448 if (usb_submit_urb(usbtouch->irq, GFP_KERNEL)) {
1449 r = -EIO;
1450 goto out_put;
1451 }
1452 }
1453
1454 usbtouch->interface->needs_remote_wakeup = 1;
1455 out_put:
1456 usb_autopm_put_interface(usbtouch->interface);
1457 out:
1458 return r;
1459 }
1460
usbtouch_close(struct input_dev * input)1461 static void usbtouch_close(struct input_dev *input)
1462 {
1463 struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1464 int r;
1465
1466 if (!usbtouch->type->irq_always)
1467 usb_kill_urb(usbtouch->irq);
1468 r = usb_autopm_get_interface(usbtouch->interface);
1469 usbtouch->interface->needs_remote_wakeup = 0;
1470 if (!r)
1471 usb_autopm_put_interface(usbtouch->interface);
1472 }
1473
usbtouch_suspend(struct usb_interface * intf,pm_message_t message)1474 static int usbtouch_suspend
1475 (struct usb_interface *intf, pm_message_t message)
1476 {
1477 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1478
1479 usb_kill_urb(usbtouch->irq);
1480
1481 return 0;
1482 }
1483
usbtouch_resume(struct usb_interface * intf)1484 static int usbtouch_resume(struct usb_interface *intf)
1485 {
1486 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1487 struct input_dev *input = usbtouch->input;
1488 int result = 0;
1489
1490 mutex_lock(&input->mutex);
1491 if (input->users || usbtouch->type->irq_always)
1492 result = usb_submit_urb(usbtouch->irq, GFP_NOIO);
1493 mutex_unlock(&input->mutex);
1494
1495 return result;
1496 }
1497
usbtouch_reset_resume(struct usb_interface * intf)1498 static int usbtouch_reset_resume(struct usb_interface *intf)
1499 {
1500 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1501 struct input_dev *input = usbtouch->input;
1502 int err = 0;
1503
1504 /* reinit the device */
1505 if (usbtouch->type->init) {
1506 err = usbtouch->type->init(usbtouch);
1507 if (err) {
1508 dev_dbg(&intf->dev,
1509 "%s - type->init() failed, err: %d\n",
1510 __func__, err);
1511 return err;
1512 }
1513 }
1514
1515 /* restart IO if needed */
1516 mutex_lock(&input->mutex);
1517 if (input->users)
1518 err = usb_submit_urb(usbtouch->irq, GFP_NOIO);
1519 mutex_unlock(&input->mutex);
1520
1521 return err;
1522 }
1523
usbtouch_free_buffers(struct usb_device * udev,struct usbtouch_usb * usbtouch)1524 static void usbtouch_free_buffers(struct usb_device *udev,
1525 struct usbtouch_usb *usbtouch)
1526 {
1527 usb_free_coherent(udev, usbtouch->data_size,
1528 usbtouch->data, usbtouch->data_dma);
1529 kfree(usbtouch->buffer);
1530 }
1531
1532 static struct usb_endpoint_descriptor *
usbtouch_get_input_endpoint(struct usb_host_interface * interface)1533 usbtouch_get_input_endpoint(struct usb_host_interface *interface)
1534 {
1535 int i;
1536
1537 for (i = 0; i < interface->desc.bNumEndpoints; i++)
1538 if (usb_endpoint_dir_in(&interface->endpoint[i].desc))
1539 return &interface->endpoint[i].desc;
1540
1541 return NULL;
1542 }
1543
usbtouch_probe(struct usb_interface * intf,const struct usb_device_id * id)1544 static int usbtouch_probe(struct usb_interface *intf,
1545 const struct usb_device_id *id)
1546 {
1547 struct usbtouch_usb *usbtouch;
1548 struct input_dev *input_dev;
1549 struct usb_endpoint_descriptor *endpoint;
1550 struct usb_device *udev = interface_to_usbdev(intf);
1551 struct usbtouch_device_info *type;
1552 int err = -ENOMEM;
1553
1554 /* some devices are ignored */
1555 if (id->driver_info == DEVTYPE_IGNORE)
1556 return -ENODEV;
1557
1558 endpoint = usbtouch_get_input_endpoint(intf->cur_altsetting);
1559 if (!endpoint)
1560 return -ENXIO;
1561
1562 usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL);
1563 input_dev = input_allocate_device();
1564 if (!usbtouch || !input_dev)
1565 goto out_free;
1566
1567 type = &usbtouch_dev_info[id->driver_info];
1568 usbtouch->type = type;
1569 if (!type->process_pkt)
1570 type->process_pkt = usbtouch_process_pkt;
1571
1572 usbtouch->data_size = type->rept_size;
1573 if (type->get_pkt_len) {
1574 /*
1575 * When dealing with variable-length packets we should
1576 * not request more than wMaxPacketSize bytes at once
1577 * as we do not know if there is more data coming or
1578 * we filled exactly wMaxPacketSize bytes and there is
1579 * nothing else.
1580 */
1581 usbtouch->data_size = min(usbtouch->data_size,
1582 usb_endpoint_maxp(endpoint));
1583 }
1584
1585 usbtouch->data = usb_alloc_coherent(udev, usbtouch->data_size,
1586 GFP_KERNEL, &usbtouch->data_dma);
1587 if (!usbtouch->data)
1588 goto out_free;
1589
1590 if (type->get_pkt_len) {
1591 usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL);
1592 if (!usbtouch->buffer)
1593 goto out_free_buffers;
1594 }
1595
1596 usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
1597 if (!usbtouch->irq) {
1598 dev_dbg(&intf->dev,
1599 "%s - usb_alloc_urb failed: usbtouch->irq\n", __func__);
1600 goto out_free_buffers;
1601 }
1602
1603 usbtouch->interface = intf;
1604 usbtouch->input = input_dev;
1605
1606 if (udev->manufacturer)
1607 strlcpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name));
1608
1609 if (udev->product) {
1610 if (udev->manufacturer)
1611 strlcat(usbtouch->name, " ", sizeof(usbtouch->name));
1612 strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name));
1613 }
1614
1615 if (!strlen(usbtouch->name))
1616 snprintf(usbtouch->name, sizeof(usbtouch->name),
1617 "USB Touchscreen %04x:%04x",
1618 le16_to_cpu(udev->descriptor.idVendor),
1619 le16_to_cpu(udev->descriptor.idProduct));
1620
1621 usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys));
1622 strlcat(usbtouch->phys, "/input0", sizeof(usbtouch->phys));
1623
1624 input_dev->name = usbtouch->name;
1625 input_dev->phys = usbtouch->phys;
1626 usb_to_input_id(udev, &input_dev->id);
1627 input_dev->dev.parent = &intf->dev;
1628
1629 input_set_drvdata(input_dev, usbtouch);
1630
1631 input_dev->open = usbtouch_open;
1632 input_dev->close = usbtouch_close;
1633
1634 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
1635 input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
1636 input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0);
1637 input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0);
1638 if (type->max_press)
1639 input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press,
1640 type->max_press, 0, 0);
1641
1642 if (usb_endpoint_type(endpoint) == USB_ENDPOINT_XFER_INT)
1643 usb_fill_int_urb(usbtouch->irq, udev,
1644 usb_rcvintpipe(udev, endpoint->bEndpointAddress),
1645 usbtouch->data, usbtouch->data_size,
1646 usbtouch_irq, usbtouch, endpoint->bInterval);
1647 else
1648 usb_fill_bulk_urb(usbtouch->irq, udev,
1649 usb_rcvbulkpipe(udev, endpoint->bEndpointAddress),
1650 usbtouch->data, usbtouch->data_size,
1651 usbtouch_irq, usbtouch);
1652
1653 usbtouch->irq->dev = udev;
1654 usbtouch->irq->transfer_dma = usbtouch->data_dma;
1655 usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1656
1657 /* device specific allocations */
1658 if (type->alloc) {
1659 err = type->alloc(usbtouch);
1660 if (err) {
1661 dev_dbg(&intf->dev,
1662 "%s - type->alloc() failed, err: %d\n",
1663 __func__, err);
1664 goto out_free_urb;
1665 }
1666 }
1667
1668 /* device specific initialisation*/
1669 if (type->init) {
1670 err = type->init(usbtouch);
1671 if (err) {
1672 dev_dbg(&intf->dev,
1673 "%s - type->init() failed, err: %d\n",
1674 __func__, err);
1675 goto out_do_exit;
1676 }
1677 }
1678
1679 err = input_register_device(usbtouch->input);
1680 if (err) {
1681 dev_dbg(&intf->dev,
1682 "%s - input_register_device failed, err: %d\n",
1683 __func__, err);
1684 goto out_do_exit;
1685 }
1686
1687 usb_set_intfdata(intf, usbtouch);
1688
1689 if (usbtouch->type->irq_always) {
1690 /* this can't fail */
1691 usb_autopm_get_interface(intf);
1692 err = usb_submit_urb(usbtouch->irq, GFP_KERNEL);
1693 if (err) {
1694 usb_autopm_put_interface(intf);
1695 dev_err(&intf->dev,
1696 "%s - usb_submit_urb failed with result: %d\n",
1697 __func__, err);
1698 goto out_unregister_input;
1699 }
1700 }
1701
1702 return 0;
1703
1704 out_unregister_input:
1705 input_unregister_device(input_dev);
1706 input_dev = NULL;
1707 out_do_exit:
1708 if (type->exit)
1709 type->exit(usbtouch);
1710 out_free_urb:
1711 usb_free_urb(usbtouch->irq);
1712 out_free_buffers:
1713 usbtouch_free_buffers(udev, usbtouch);
1714 out_free:
1715 input_free_device(input_dev);
1716 kfree(usbtouch);
1717 return err;
1718 }
1719
usbtouch_disconnect(struct usb_interface * intf)1720 static void usbtouch_disconnect(struct usb_interface *intf)
1721 {
1722 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1723
1724 if (!usbtouch)
1725 return;
1726
1727 dev_dbg(&intf->dev,
1728 "%s - usbtouch is initialized, cleaning up\n", __func__);
1729
1730 usb_set_intfdata(intf, NULL);
1731 /* this will stop IO via close */
1732 input_unregister_device(usbtouch->input);
1733 usb_free_urb(usbtouch->irq);
1734 if (usbtouch->type->exit)
1735 usbtouch->type->exit(usbtouch);
1736 usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch);
1737 kfree(usbtouch);
1738 }
1739
1740 MODULE_DEVICE_TABLE(usb, usbtouch_devices);
1741
1742 static struct usb_driver usbtouch_driver = {
1743 .name = "usbtouchscreen",
1744 .probe = usbtouch_probe,
1745 .disconnect = usbtouch_disconnect,
1746 .suspend = usbtouch_suspend,
1747 .resume = usbtouch_resume,
1748 .reset_resume = usbtouch_reset_resume,
1749 .id_table = usbtouch_devices,
1750 .supports_autosuspend = 1,
1751 };
1752
1753 module_usb_driver(usbtouch_driver);
1754
1755 MODULE_AUTHOR(DRIVER_AUTHOR);
1756 MODULE_DESCRIPTION(DRIVER_DESC);
1757 MODULE_LICENSE("GPL");
1758
1759 MODULE_ALIAS("touchkitusb");
1760 MODULE_ALIAS("itmtouch");
1761 MODULE_ALIAS("mtouchusb");
1762