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Merge branch 'for-2.6.35' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie...
[deliverable/linux.git] / drivers / input / touchscreen / usbtouchscreen.c
1 /******************************************************************************
2 * usbtouchscreen.c
3 * Driver for USB Touchscreens, supporting those devices:
4 * - eGalax Touchkit
5 * includes eTurboTouch CT-410/510/700
6 * - 3M/Microtouch EX II series
7 * - ITM
8 * - PanJit TouchSet
9 * - eTurboTouch
10 * - Gunze AHL61
11 * - DMC TSC-10/25
12 * - IRTOUCHSYSTEMS/UNITOP
13 * - IdealTEK URTC1000
14 * - General Touch
15 * - GoTop Super_Q2/GogoPen/PenPower tablets
16 * - JASTEC USB touch controller/DigiTech DTR-02U
17 * - Zytronic capacitive touchscreen
18 * - NEXIO/iNexio
19 *
20 * Copyright (C) 2004-2007 by Daniel Ritz <daniel.ritz@gmx.ch>
21 * Copyright (C) by Todd E. Johnson (mtouchusb.c)
22 *
23 * This program is free software; you can redistribute it and/or
24 * modify it under the terms of the GNU General Public License as
25 * published by the Free Software Foundation; either version 2 of the
26 * License, or (at your option) any later version.
27 *
28 * This program is distributed in the hope that it will be useful, but
29 * WITHOUT ANY WARRANTY; without even the implied warranty of
30 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
31 * General Public License for more details.
32 *
33 * You should have received a copy of the GNU General Public License
34 * along with this program; if not, write to the Free Software
35 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
36 *
37 * Driver is based on touchkitusb.c
38 * - ITM parts are from itmtouch.c
39 * - 3M parts are from mtouchusb.c
40 * - PanJit parts are from an unmerged driver by Lanslott Gish
41 * - DMC TSC 10/25 are from Holger Schurig, with ideas from an unmerged
42 * driver from Marius Vollmer
43 *
44 *****************************************************************************/
45
46 //#define DEBUG
47
48 #include <linux/kernel.h>
49 #include <linux/slab.h>
50 #include <linux/input.h>
51 #include <linux/module.h>
52 #include <linux/init.h>
53 #include <linux/usb.h>
54 #include <linux/usb/input.h>
55 #include <linux/hid.h>
56
57
58 #define DRIVER_VERSION "v0.6"
59 #define DRIVER_AUTHOR "Daniel Ritz <daniel.ritz@gmx.ch>"
60 #define DRIVER_DESC "USB Touchscreen Driver"
61
62 static int swap_xy;
63 module_param(swap_xy, bool, 0644);
64 MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");
65
66 static int hwcalib_xy;
67 module_param(hwcalib_xy, bool, 0644);
68 MODULE_PARM_DESC(hwcalib_xy, "If set hw-calibrated X/Y are used if available");
69
70 /* device specifc data/functions */
71 struct usbtouch_usb;
72 struct usbtouch_device_info {
73 int min_xc, max_xc;
74 int min_yc, max_yc;
75 int min_press, max_press;
76 int rept_size;
77
78 /*
79 * Always service the USB devices irq not just when the input device is
80 * open. This is useful when devices have a watchdog which prevents us
81 * from periodically polling the device. Leave this unset unless your
82 * touchscreen device requires it, as it does consume more of the USB
83 * bandwidth.
84 */
85 bool irq_always;
86
87 void (*process_pkt) (struct usbtouch_usb *usbtouch, unsigned char *pkt, int len);
88
89 /*
90 * used to get the packet len. possible return values:
91 * > 0: packet len
92 * = 0: skip one byte
93 * < 0: -return value more bytes needed
94 */
95 int (*get_pkt_len) (unsigned char *pkt, int len);
96
97 int (*read_data) (struct usbtouch_usb *usbtouch, unsigned char *pkt);
98 int (*init) (struct usbtouch_usb *usbtouch);
99 void (*exit) (struct usbtouch_usb *usbtouch);
100 };
101
102 /* a usbtouch device */
103 struct usbtouch_usb {
104 unsigned char *data;
105 dma_addr_t data_dma;
106 unsigned char *buffer;
107 int buf_len;
108 struct urb *irq;
109 struct usb_interface *interface;
110 struct input_dev *input;
111 struct usbtouch_device_info *type;
112 char name[128];
113 char phys[64];
114 void *priv;
115
116 int x, y;
117 int touch, press;
118 };
119
120
121 /* device types */
122 enum {
123 DEVTYPE_IGNORE = -1,
124 DEVTYPE_EGALAX,
125 DEVTYPE_PANJIT,
126 DEVTYPE_3M,
127 DEVTYPE_ITM,
128 DEVTYPE_ETURBO,
129 DEVTYPE_GUNZE,
130 DEVTYPE_DMC_TSC10,
131 DEVTYPE_IRTOUCH,
132 DEVTYPE_IDEALTEK,
133 DEVTYPE_GENERAL_TOUCH,
134 DEVTYPE_GOTOP,
135 DEVTYPE_JASTEC,
136 DEVTYPE_E2I,
137 DEVTYPE_ZYTRONIC,
138 DEVTYPE_TC5UH,
139 DEVTYPE_NEXIO,
140 };
141
142 #define USB_DEVICE_HID_CLASS(vend, prod) \
143 .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS \
144 | USB_DEVICE_ID_MATCH_INT_PROTOCOL \
145 | USB_DEVICE_ID_MATCH_DEVICE, \
146 .idVendor = (vend), \
147 .idProduct = (prod), \
148 .bInterfaceClass = USB_INTERFACE_CLASS_HID, \
149 .bInterfaceProtocol = USB_INTERFACE_PROTOCOL_MOUSE
150
151 static const struct usb_device_id usbtouch_devices[] = {
152 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
153 /* ignore the HID capable devices, handled by usbhid */
154 {USB_DEVICE_HID_CLASS(0x0eef, 0x0001), .driver_info = DEVTYPE_IGNORE},
155 {USB_DEVICE_HID_CLASS(0x0eef, 0x0002), .driver_info = DEVTYPE_IGNORE},
156
157 /* normal device IDs */
158 {USB_DEVICE(0x3823, 0x0001), .driver_info = DEVTYPE_EGALAX},
159 {USB_DEVICE(0x3823, 0x0002), .driver_info = DEVTYPE_EGALAX},
160 {USB_DEVICE(0x0123, 0x0001), .driver_info = DEVTYPE_EGALAX},
161 {USB_DEVICE(0x0eef, 0x0001), .driver_info = DEVTYPE_EGALAX},
162 {USB_DEVICE(0x0eef, 0x0002), .driver_info = DEVTYPE_EGALAX},
163 {USB_DEVICE(0x1234, 0x0001), .driver_info = DEVTYPE_EGALAX},
164 {USB_DEVICE(0x1234, 0x0002), .driver_info = DEVTYPE_EGALAX},
165 #endif
166
167 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
168 {USB_DEVICE(0x134c, 0x0001), .driver_info = DEVTYPE_PANJIT},
169 {USB_DEVICE(0x134c, 0x0002), .driver_info = DEVTYPE_PANJIT},
170 {USB_DEVICE(0x134c, 0x0003), .driver_info = DEVTYPE_PANJIT},
171 {USB_DEVICE(0x134c, 0x0004), .driver_info = DEVTYPE_PANJIT},
172 #endif
173
174 #ifdef CONFIG_TOUCHSCREEN_USB_3M
175 {USB_DEVICE(0x0596, 0x0001), .driver_info = DEVTYPE_3M},
176 #endif
177
178 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
179 {USB_DEVICE(0x0403, 0xf9e9), .driver_info = DEVTYPE_ITM},
180 #endif
181
182 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
183 {USB_DEVICE(0x1234, 0x5678), .driver_info = DEVTYPE_ETURBO},
184 #endif
185
186 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
187 {USB_DEVICE(0x0637, 0x0001), .driver_info = DEVTYPE_GUNZE},
188 #endif
189
190 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
191 {USB_DEVICE(0x0afa, 0x03e8), .driver_info = DEVTYPE_DMC_TSC10},
192 #endif
193
194 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
195 {USB_DEVICE(0x595a, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
196 {USB_DEVICE(0x6615, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
197 #endif
198
199 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
200 {USB_DEVICE(0x1391, 0x1000), .driver_info = DEVTYPE_IDEALTEK},
201 #endif
202
203 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
204 {USB_DEVICE(0x0dfc, 0x0001), .driver_info = DEVTYPE_GENERAL_TOUCH},
205 #endif
206
207 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
208 {USB_DEVICE(0x08f2, 0x007f), .driver_info = DEVTYPE_GOTOP},
209 {USB_DEVICE(0x08f2, 0x00ce), .driver_info = DEVTYPE_GOTOP},
210 {USB_DEVICE(0x08f2, 0x00f4), .driver_info = DEVTYPE_GOTOP},
211 #endif
212
213 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
214 {USB_DEVICE(0x0f92, 0x0001), .driver_info = DEVTYPE_JASTEC},
215 #endif
216
217 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
218 {USB_DEVICE(0x1ac7, 0x0001), .driver_info = DEVTYPE_E2I},
219 #endif
220
221 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
222 {USB_DEVICE(0x14c8, 0x0003), .driver_info = DEVTYPE_ZYTRONIC},
223 #endif
224
225 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC5UH
226 {USB_DEVICE(0x0664, 0x0309), .driver_info = DEVTYPE_TC5UH},
227 #endif
228
229 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
230 /* data interface only */
231 {USB_DEVICE_AND_INTERFACE_INFO(0x10f0, 0x2002, 0x0a, 0x00, 0x00),
232 .driver_info = DEVTYPE_NEXIO},
233 {USB_DEVICE_AND_INTERFACE_INFO(0x1870, 0x0001, 0x0a, 0x00, 0x00),
234 .driver_info = DEVTYPE_NEXIO},
235 #endif
236
237 {}
238 };
239
240
241 /*****************************************************************************
242 * e2i Part
243 */
244
245 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
246 static int e2i_init(struct usbtouch_usb *usbtouch)
247 {
248 int ret;
249 struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
250
251 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
252 0x01, 0x02, 0x0000, 0x0081,
253 NULL, 0, USB_CTRL_SET_TIMEOUT);
254
255 dbg("%s - usb_control_msg - E2I_RESET - bytes|err: %d",
256 __func__, ret);
257 return ret;
258 }
259
260 static int e2i_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
261 {
262 int tmp = (pkt[0] << 8) | pkt[1];
263 dev->x = (pkt[2] << 8) | pkt[3];
264 dev->y = (pkt[4] << 8) | pkt[5];
265
266 tmp = tmp - 0xA000;
267 dev->touch = (tmp > 0);
268 dev->press = (tmp > 0 ? tmp : 0);
269
270 return 1;
271 }
272 #endif
273
274
275 /*****************************************************************************
276 * eGalax part
277 */
278
279 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
280
281 #ifndef MULTI_PACKET
282 #define MULTI_PACKET
283 #endif
284
285 #define EGALAX_PKT_TYPE_MASK 0xFE
286 #define EGALAX_PKT_TYPE_REPT 0x80
287 #define EGALAX_PKT_TYPE_DIAG 0x0A
288
289 static int egalax_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
290 {
291 if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT)
292 return 0;
293
294 dev->x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F);
295 dev->y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F);
296 dev->touch = pkt[0] & 0x01;
297
298 return 1;
299 }
300
301 static int egalax_get_pkt_len(unsigned char *buf, int len)
302 {
303 switch (buf[0] & EGALAX_PKT_TYPE_MASK) {
304 case EGALAX_PKT_TYPE_REPT:
305 return 5;
306
307 case EGALAX_PKT_TYPE_DIAG:
308 if (len < 2)
309 return -1;
310
311 return buf[1] + 2;
312 }
313
314 return 0;
315 }
316 #endif
317
318
319 /*****************************************************************************
320 * PanJit Part
321 */
322 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
323 static int panjit_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
324 {
325 dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
326 dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
327 dev->touch = pkt[0] & 0x01;
328
329 return 1;
330 }
331 #endif
332
333
334 /*****************************************************************************
335 * 3M/Microtouch Part
336 */
337 #ifdef CONFIG_TOUCHSCREEN_USB_3M
338
339 #define MTOUCHUSB_ASYNC_REPORT 1
340 #define MTOUCHUSB_RESET 7
341 #define MTOUCHUSB_REQ_CTRLLR_ID 10
342
343 static int mtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
344 {
345 if (hwcalib_xy) {
346 dev->x = (pkt[4] << 8) | pkt[3];
347 dev->y = 0xffff - ((pkt[6] << 8) | pkt[5]);
348 } else {
349 dev->x = (pkt[8] << 8) | pkt[7];
350 dev->y = (pkt[10] << 8) | pkt[9];
351 }
352 dev->touch = (pkt[2] & 0x40) ? 1 : 0;
353
354 return 1;
355 }
356
357 static int mtouch_init(struct usbtouch_usb *usbtouch)
358 {
359 int ret, i;
360 struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
361
362 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
363 MTOUCHUSB_RESET,
364 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
365 1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
366 dbg("%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d",
367 __func__, ret);
368 if (ret < 0)
369 return ret;
370 msleep(150);
371
372 for (i = 0; i < 3; i++) {
373 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
374 MTOUCHUSB_ASYNC_REPORT,
375 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
376 1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT);
377 dbg("%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d",
378 __func__, ret);
379 if (ret >= 0)
380 break;
381 if (ret != -EPIPE)
382 return ret;
383 }
384
385 /* Default min/max xy are the raw values, override if using hw-calib */
386 if (hwcalib_xy) {
387 input_set_abs_params(usbtouch->input, ABS_X, 0, 0xffff, 0, 0);
388 input_set_abs_params(usbtouch->input, ABS_Y, 0, 0xffff, 0, 0);
389 }
390
391 return 0;
392 }
393 #endif
394
395
396 /*****************************************************************************
397 * ITM Part
398 */
399 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
400 static int itm_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
401 {
402 int touch;
403 /*
404 * ITM devices report invalid x/y data if not touched.
405 * if the screen was touched before but is not touched any more
406 * report touch as 0 with the last valid x/y data once. then stop
407 * reporting data until touched again.
408 */
409 dev->press = ((pkt[2] & 0x01) << 7) | (pkt[5] & 0x7F);
410
411 touch = ~pkt[7] & 0x20;
412 if (!touch) {
413 if (dev->touch) {
414 dev->touch = 0;
415 return 1;
416 }
417
418 return 0;
419 }
420
421 dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F);
422 dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F);
423 dev->touch = touch;
424
425 return 1;
426 }
427 #endif
428
429
430 /*****************************************************************************
431 * eTurboTouch part
432 */
433 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
434 #ifndef MULTI_PACKET
435 #define MULTI_PACKET
436 #endif
437 static int eturbo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
438 {
439 unsigned int shift;
440
441 /* packets should start with sync */
442 if (!(pkt[0] & 0x80))
443 return 0;
444
445 shift = (6 - (pkt[0] & 0x03));
446 dev->x = ((pkt[3] << 7) | pkt[4]) >> shift;
447 dev->y = ((pkt[1] << 7) | pkt[2]) >> shift;
448 dev->touch = (pkt[0] & 0x10) ? 1 : 0;
449
450 return 1;
451 }
452
453 static int eturbo_get_pkt_len(unsigned char *buf, int len)
454 {
455 if (buf[0] & 0x80)
456 return 5;
457 if (buf[0] == 0x01)
458 return 3;
459 return 0;
460 }
461 #endif
462
463
464 /*****************************************************************************
465 * Gunze part
466 */
467 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
468 static int gunze_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
469 {
470 if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80))
471 return 0;
472
473 dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F);
474 dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F);
475 dev->touch = pkt[0] & 0x20;
476
477 return 1;
478 }
479 #endif
480
481 /*****************************************************************************
482 * DMC TSC-10/25 Part
483 *
484 * Documentation about the controller and it's protocol can be found at
485 * http://www.dmccoltd.com/files/controler/tsc10usb_pi_e.pdf
486 * http://www.dmccoltd.com/files/controler/tsc25_usb_e.pdf
487 */
488 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
489
490 /* supported data rates. currently using 130 */
491 #define TSC10_RATE_POINT 0x50
492 #define TSC10_RATE_30 0x40
493 #define TSC10_RATE_50 0x41
494 #define TSC10_RATE_80 0x42
495 #define TSC10_RATE_100 0x43
496 #define TSC10_RATE_130 0x44
497 #define TSC10_RATE_150 0x45
498
499 /* commands */
500 #define TSC10_CMD_RESET 0x55
501 #define TSC10_CMD_RATE 0x05
502 #define TSC10_CMD_DATA1 0x01
503
504 static int dmc_tsc10_init(struct usbtouch_usb *usbtouch)
505 {
506 struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
507 int ret = -ENOMEM;
508 unsigned char *buf;
509
510 buf = kmalloc(2, GFP_KERNEL);
511 if (!buf)
512 goto err_nobuf;
513 /* reset */
514 buf[0] = buf[1] = 0xFF;
515 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
516 TSC10_CMD_RESET,
517 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
518 0, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
519 if (ret < 0)
520 goto err_out;
521 if (buf[0] != 0x06) {
522 ret = -ENODEV;
523 goto err_out;
524 }
525
526 /* set coordinate output rate */
527 buf[0] = buf[1] = 0xFF;
528 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
529 TSC10_CMD_RATE,
530 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
531 TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
532 if (ret < 0)
533 goto err_out;
534 if ((buf[0] != 0x06) && (buf[0] != 0x15 || buf[1] != 0x01)) {
535 ret = -ENODEV;
536 goto err_out;
537 }
538
539 /* start sending data */
540 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
541 TSC10_CMD_DATA1,
542 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
543 0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
544 err_out:
545 kfree(buf);
546 err_nobuf:
547 return ret;
548 }
549
550
551 static int dmc_tsc10_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
552 {
553 dev->x = ((pkt[2] & 0x03) << 8) | pkt[1];
554 dev->y = ((pkt[4] & 0x03) << 8) | pkt[3];
555 dev->touch = pkt[0] & 0x01;
556
557 return 1;
558 }
559 #endif
560
561
562 /*****************************************************************************
563 * IRTOUCH Part
564 */
565 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
566 static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
567 {
568 dev->x = (pkt[3] << 8) | pkt[2];
569 dev->y = (pkt[5] << 8) | pkt[4];
570 dev->touch = (pkt[1] & 0x03) ? 1 : 0;
571
572 return 1;
573 }
574 #endif
575
576 /*****************************************************************************
577 * ET&T TC5UH part
578 */
579 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC5UH
580 static int tc5uh_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
581 {
582 dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
583 dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
584 dev->touch = pkt[0] & 0x01;
585
586 return 1;
587 }
588 #endif
589
590 /*****************************************************************************
591 * IdealTEK URTC1000 Part
592 */
593 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
594 #ifndef MULTI_PACKET
595 #define MULTI_PACKET
596 #endif
597 static int idealtek_get_pkt_len(unsigned char *buf, int len)
598 {
599 if (buf[0] & 0x80)
600 return 5;
601 if (buf[0] == 0x01)
602 return len;
603 return 0;
604 }
605
606 static int idealtek_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
607 {
608 switch (pkt[0] & 0x98) {
609 case 0x88:
610 /* touch data in IdealTEK mode */
611 dev->x = (pkt[1] << 5) | (pkt[2] >> 2);
612 dev->y = (pkt[3] << 5) | (pkt[4] >> 2);
613 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
614 return 1;
615
616 case 0x98:
617 /* touch data in MT emulation mode */
618 dev->x = (pkt[2] << 5) | (pkt[1] >> 2);
619 dev->y = (pkt[4] << 5) | (pkt[3] >> 2);
620 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
621 return 1;
622
623 default:
624 return 0;
625 }
626 }
627 #endif
628
629 /*****************************************************************************
630 * General Touch Part
631 */
632 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
633 static int general_touch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
634 {
635 dev->x = (pkt[2] << 8) | pkt[1];
636 dev->y = (pkt[4] << 8) | pkt[3];
637 dev->press = pkt[5] & 0xff;
638 dev->touch = pkt[0] & 0x01;
639
640 return 1;
641 }
642 #endif
643
644 /*****************************************************************************
645 * GoTop Part
646 */
647 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
648 static int gotop_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
649 {
650 dev->x = ((pkt[1] & 0x38) << 4) | pkt[2];
651 dev->y = ((pkt[1] & 0x07) << 7) | pkt[3];
652 dev->touch = pkt[0] & 0x01;
653
654 return 1;
655 }
656 #endif
657
658 /*****************************************************************************
659 * JASTEC Part
660 */
661 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
662 static int jastec_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
663 {
664 dev->x = ((pkt[0] & 0x3f) << 6) | (pkt[2] & 0x3f);
665 dev->y = ((pkt[1] & 0x3f) << 6) | (pkt[3] & 0x3f);
666 dev->touch = (pkt[0] & 0x40) >> 6;
667
668 return 1;
669 }
670 #endif
671
672 /*****************************************************************************
673 * Zytronic Part
674 */
675 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
676 static int zytronic_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
677 {
678 switch (pkt[0]) {
679 case 0x3A: /* command response */
680 dbg("%s: Command response %d", __func__, pkt[1]);
681 break;
682
683 case 0xC0: /* down */
684 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
685 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
686 dev->touch = 1;
687 dbg("%s: down %d,%d", __func__, dev->x, dev->y);
688 return 1;
689
690 case 0x80: /* up */
691 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
692 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
693 dev->touch = 0;
694 dbg("%s: up %d,%d", __func__, dev->x, dev->y);
695 return 1;
696
697 default:
698 dbg("%s: Unknown return %d", __func__, pkt[0]);
699 break;
700 }
701
702 return 0;
703 }
704 #endif
705
706 /*****************************************************************************
707 * NEXIO Part
708 */
709 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
710
711 #define NEXIO_TIMEOUT 5000
712 #define NEXIO_BUFSIZE 1024
713 #define NEXIO_THRESHOLD 50
714
715 struct nexio_priv {
716 struct urb *ack;
717 unsigned char *ack_buf;
718 };
719
720 struct nexio_touch_packet {
721 u8 flags; /* 0xe1 = touch, 0xe1 = release */
722 __be16 data_len; /* total bytes of touch data */
723 __be16 x_len; /* bytes for X axis */
724 __be16 y_len; /* bytes for Y axis */
725 u8 data[];
726 } __attribute__ ((packed));
727
728 static unsigned char nexio_ack_pkt[2] = { 0xaa, 0x02 };
729 static unsigned char nexio_init_pkt[4] = { 0x82, 0x04, 0x0a, 0x0f };
730
731 static void nexio_ack_complete(struct urb *urb)
732 {
733 }
734
735 static int nexio_init(struct usbtouch_usb *usbtouch)
736 {
737 struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
738 struct usb_host_interface *interface = usbtouch->interface->cur_altsetting;
739 struct nexio_priv *priv;
740 int ret = -ENOMEM;
741 int actual_len, i;
742 unsigned char *buf;
743 char *firmware_ver = NULL, *device_name = NULL;
744 int input_ep = 0, output_ep = 0;
745
746 /* find first input and output endpoint */
747 for (i = 0; i < interface->desc.bNumEndpoints; i++) {
748 if (!input_ep &&
749 usb_endpoint_dir_in(&interface->endpoint[i].desc))
750 input_ep = interface->endpoint[i].desc.bEndpointAddress;
751 if (!output_ep &&
752 usb_endpoint_dir_out(&interface->endpoint[i].desc))
753 output_ep = interface->endpoint[i].desc.bEndpointAddress;
754 }
755 if (!input_ep || !output_ep)
756 return -ENXIO;
757
758 buf = kmalloc(NEXIO_BUFSIZE, GFP_KERNEL);
759 if (!buf)
760 goto out_buf;
761
762 /* two empty reads */
763 for (i = 0; i < 2; i++) {
764 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
765 buf, NEXIO_BUFSIZE, &actual_len,
766 NEXIO_TIMEOUT);
767 if (ret < 0)
768 goto out_buf;
769 }
770
771 /* send init command */
772 memcpy(buf, nexio_init_pkt, sizeof(nexio_init_pkt));
773 ret = usb_bulk_msg(dev, usb_sndbulkpipe(dev, output_ep),
774 buf, sizeof(nexio_init_pkt), &actual_len,
775 NEXIO_TIMEOUT);
776 if (ret < 0)
777 goto out_buf;
778
779 /* read replies */
780 for (i = 0; i < 3; i++) {
781 memset(buf, 0, NEXIO_BUFSIZE);
782 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
783 buf, NEXIO_BUFSIZE, &actual_len,
784 NEXIO_TIMEOUT);
785 if (ret < 0 || actual_len < 1 || buf[1] != actual_len)
786 continue;
787 switch (buf[0]) {
788 case 0x83: /* firmware version */
789 if (!firmware_ver)
790 firmware_ver = kstrdup(&buf[2], GFP_KERNEL);
791 break;
792 case 0x84: /* device name */
793 if (!device_name)
794 device_name = kstrdup(&buf[2], GFP_KERNEL);
795 break;
796 }
797 }
798
799 printk(KERN_INFO "Nexio device: %s, firmware version: %s\n",
800 device_name, firmware_ver);
801
802 kfree(firmware_ver);
803 kfree(device_name);
804
805 /* prepare ACK URB */
806 ret = -ENOMEM;
807
808 usbtouch->priv = kmalloc(sizeof(struct nexio_priv), GFP_KERNEL);
809 if (!usbtouch->priv)
810 goto out_buf;
811
812 priv = usbtouch->priv;
813
814 priv->ack_buf = kmalloc(sizeof(nexio_ack_pkt), GFP_KERNEL);
815 if (!priv->ack_buf)
816 goto err_priv;
817
818 memcpy(priv->ack_buf, nexio_ack_pkt, sizeof(nexio_ack_pkt));
819
820 priv->ack = usb_alloc_urb(0, GFP_KERNEL);
821 if (!priv->ack) {
822 dbg("%s - usb_alloc_urb failed: usbtouch->ack", __func__);
823 goto err_ack_buf;
824 }
825
826 usb_fill_bulk_urb(priv->ack, dev, usb_sndbulkpipe(dev, output_ep),
827 priv->ack_buf, sizeof(nexio_ack_pkt),
828 nexio_ack_complete, usbtouch);
829 ret = 0;
830 goto out_buf;
831
832 err_ack_buf:
833 kfree(priv->ack_buf);
834 err_priv:
835 kfree(priv);
836 out_buf:
837 kfree(buf);
838 return ret;
839 }
840
841 static void nexio_exit(struct usbtouch_usb *usbtouch)
842 {
843 struct nexio_priv *priv = usbtouch->priv;
844
845 usb_kill_urb(priv->ack);
846 usb_free_urb(priv->ack);
847 kfree(priv->ack_buf);
848 kfree(priv);
849 }
850
851 static int nexio_read_data(struct usbtouch_usb *usbtouch, unsigned char *pkt)
852 {
853 int x, y, begin_x, begin_y, end_x, end_y, w, h, ret;
854 struct nexio_touch_packet *packet = (void *) pkt;
855 struct nexio_priv *priv = usbtouch->priv;
856
857 /* got touch data? */
858 if ((pkt[0] & 0xe0) != 0xe0)
859 return 0;
860
861 /* send ACK */
862 ret = usb_submit_urb(priv->ack, GFP_ATOMIC);
863
864 if (!usbtouch->type->max_xc) {
865 usbtouch->type->max_xc = 2 * be16_to_cpu(packet->x_len);
866 input_set_abs_params(usbtouch->input, ABS_X, 0,
867 2 * be16_to_cpu(packet->x_len), 0, 0);
868 usbtouch->type->max_yc = 2 * be16_to_cpu(packet->y_len);
869 input_set_abs_params(usbtouch->input, ABS_Y, 0,
870 2 * be16_to_cpu(packet->y_len), 0, 0);
871 }
872 /*
873 * The device reports state of IR sensors on X and Y axes.
874 * Each byte represents "darkness" percentage (0-100) of one element.
875 * 17" touchscreen reports only 64 x 52 bytes so the resolution is low.
876 * This also means that there's a limited multi-touch capability but
877 * it's disabled (and untested) here as there's no X driver for that.
878 */
879 begin_x = end_x = begin_y = end_y = -1;
880 for (x = 0; x < be16_to_cpu(packet->x_len); x++) {
881 if (begin_x == -1 && packet->data[x] > NEXIO_THRESHOLD) {
882 begin_x = x;
883 continue;
884 }
885 if (end_x == -1 && begin_x != -1 && packet->data[x] < NEXIO_THRESHOLD) {
886 end_x = x - 1;
887 for (y = be16_to_cpu(packet->x_len);
888 y < be16_to_cpu(packet->data_len); y++) {
889 if (begin_y == -1 && packet->data[y] > NEXIO_THRESHOLD) {
890 begin_y = y - be16_to_cpu(packet->x_len);
891 continue;
892 }
893 if (end_y == -1 &&
894 begin_y != -1 && packet->data[y] < NEXIO_THRESHOLD) {
895 end_y = y - 1 - be16_to_cpu(packet->x_len);
896 w = end_x - begin_x;
897 h = end_y - begin_y;
898 #if 0
899 /* multi-touch */
900 input_report_abs(usbtouch->input,
901 ABS_MT_TOUCH_MAJOR, max(w,h));
902 input_report_abs(usbtouch->input,
903 ABS_MT_TOUCH_MINOR, min(x,h));
904 input_report_abs(usbtouch->input,
905 ABS_MT_POSITION_X, 2*begin_x+w);
906 input_report_abs(usbtouch->input,
907 ABS_MT_POSITION_Y, 2*begin_y+h);
908 input_report_abs(usbtouch->input,
909 ABS_MT_ORIENTATION, w > h);
910 input_mt_sync(usbtouch->input);
911 #endif
912 /* single touch */
913 usbtouch->x = 2 * begin_x + w;
914 usbtouch->y = 2 * begin_y + h;
915 usbtouch->touch = packet->flags & 0x01;
916 begin_y = end_y = -1;
917 return 1;
918 }
919 }
920 begin_x = end_x = -1;
921 }
922
923 }
924 return 0;
925 }
926 #endif
927
928
929 /*****************************************************************************
930 * the different device descriptors
931 */
932 #ifdef MULTI_PACKET
933 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
934 unsigned char *pkt, int len);
935 #endif
936
937 static struct usbtouch_device_info usbtouch_dev_info[] = {
938 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
939 [DEVTYPE_EGALAX] = {
940 .min_xc = 0x0,
941 .max_xc = 0x07ff,
942 .min_yc = 0x0,
943 .max_yc = 0x07ff,
944 .rept_size = 16,
945 .process_pkt = usbtouch_process_multi,
946 .get_pkt_len = egalax_get_pkt_len,
947 .read_data = egalax_read_data,
948 },
949 #endif
950
951 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
952 [DEVTYPE_PANJIT] = {
953 .min_xc = 0x0,
954 .max_xc = 0x0fff,
955 .min_yc = 0x0,
956 .max_yc = 0x0fff,
957 .rept_size = 8,
958 .read_data = panjit_read_data,
959 },
960 #endif
961
962 #ifdef CONFIG_TOUCHSCREEN_USB_3M
963 [DEVTYPE_3M] = {
964 .min_xc = 0x0,
965 .max_xc = 0x4000,
966 .min_yc = 0x0,
967 .max_yc = 0x4000,
968 .rept_size = 11,
969 .read_data = mtouch_read_data,
970 .init = mtouch_init,
971 },
972 #endif
973
974 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
975 [DEVTYPE_ITM] = {
976 .min_xc = 0x0,
977 .max_xc = 0x0fff,
978 .min_yc = 0x0,
979 .max_yc = 0x0fff,
980 .max_press = 0xff,
981 .rept_size = 8,
982 .read_data = itm_read_data,
983 },
984 #endif
985
986 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
987 [DEVTYPE_ETURBO] = {
988 .min_xc = 0x0,
989 .max_xc = 0x07ff,
990 .min_yc = 0x0,
991 .max_yc = 0x07ff,
992 .rept_size = 8,
993 .process_pkt = usbtouch_process_multi,
994 .get_pkt_len = eturbo_get_pkt_len,
995 .read_data = eturbo_read_data,
996 },
997 #endif
998
999 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
1000 [DEVTYPE_GUNZE] = {
1001 .min_xc = 0x0,
1002 .max_xc = 0x0fff,
1003 .min_yc = 0x0,
1004 .max_yc = 0x0fff,
1005 .rept_size = 4,
1006 .read_data = gunze_read_data,
1007 },
1008 #endif
1009
1010 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
1011 [DEVTYPE_DMC_TSC10] = {
1012 .min_xc = 0x0,
1013 .max_xc = 0x03ff,
1014 .min_yc = 0x0,
1015 .max_yc = 0x03ff,
1016 .rept_size = 5,
1017 .init = dmc_tsc10_init,
1018 .read_data = dmc_tsc10_read_data,
1019 },
1020 #endif
1021
1022 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
1023 [DEVTYPE_IRTOUCH] = {
1024 .min_xc = 0x0,
1025 .max_xc = 0x0fff,
1026 .min_yc = 0x0,
1027 .max_yc = 0x0fff,
1028 .rept_size = 8,
1029 .read_data = irtouch_read_data,
1030 },
1031 #endif
1032
1033 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
1034 [DEVTYPE_IDEALTEK] = {
1035 .min_xc = 0x0,
1036 .max_xc = 0x0fff,
1037 .min_yc = 0x0,
1038 .max_yc = 0x0fff,
1039 .rept_size = 8,
1040 .process_pkt = usbtouch_process_multi,
1041 .get_pkt_len = idealtek_get_pkt_len,
1042 .read_data = idealtek_read_data,
1043 },
1044 #endif
1045
1046 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
1047 [DEVTYPE_GENERAL_TOUCH] = {
1048 .min_xc = 0x0,
1049 .max_xc = 0x7fff,
1050 .min_yc = 0x0,
1051 .max_yc = 0x7fff,
1052 .rept_size = 7,
1053 .read_data = general_touch_read_data,
1054 },
1055 #endif
1056
1057 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
1058 [DEVTYPE_GOTOP] = {
1059 .min_xc = 0x0,
1060 .max_xc = 0x03ff,
1061 .min_yc = 0x0,
1062 .max_yc = 0x03ff,
1063 .rept_size = 4,
1064 .read_data = gotop_read_data,
1065 },
1066 #endif
1067
1068 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
1069 [DEVTYPE_JASTEC] = {
1070 .min_xc = 0x0,
1071 .max_xc = 0x0fff,
1072 .min_yc = 0x0,
1073 .max_yc = 0x0fff,
1074 .rept_size = 4,
1075 .read_data = jastec_read_data,
1076 },
1077 #endif
1078
1079 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
1080 [DEVTYPE_E2I] = {
1081 .min_xc = 0x0,
1082 .max_xc = 0x7fff,
1083 .min_yc = 0x0,
1084 .max_yc = 0x7fff,
1085 .rept_size = 6,
1086 .init = e2i_init,
1087 .read_data = e2i_read_data,
1088 },
1089 #endif
1090
1091 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
1092 [DEVTYPE_ZYTRONIC] = {
1093 .min_xc = 0x0,
1094 .max_xc = 0x03ff,
1095 .min_yc = 0x0,
1096 .max_yc = 0x03ff,
1097 .rept_size = 5,
1098 .read_data = zytronic_read_data,
1099 .irq_always = true,
1100 },
1101 #endif
1102
1103 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC5UH
1104 [DEVTYPE_TC5UH] = {
1105 .min_xc = 0x0,
1106 .max_xc = 0x0fff,
1107 .min_yc = 0x0,
1108 .max_yc = 0x0fff,
1109 .rept_size = 5,
1110 .read_data = tc5uh_read_data,
1111 },
1112 #endif
1113
1114 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
1115 [DEVTYPE_NEXIO] = {
1116 .rept_size = 128,
1117 .irq_always = true,
1118 .read_data = nexio_read_data,
1119 .init = nexio_init,
1120 .exit = nexio_exit,
1121 },
1122 #endif
1123 };
1124
1125
1126 /*****************************************************************************
1127 * Generic Part
1128 */
1129 static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
1130 unsigned char *pkt, int len)
1131 {
1132 struct usbtouch_device_info *type = usbtouch->type;
1133
1134 if (!type->read_data(usbtouch, pkt))
1135 return;
1136
1137 input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch);
1138
1139 if (swap_xy) {
1140 input_report_abs(usbtouch->input, ABS_X, usbtouch->y);
1141 input_report_abs(usbtouch->input, ABS_Y, usbtouch->x);
1142 } else {
1143 input_report_abs(usbtouch->input, ABS_X, usbtouch->x);
1144 input_report_abs(usbtouch->input, ABS_Y, usbtouch->y);
1145 }
1146 if (type->max_press)
1147 input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press);
1148 input_sync(usbtouch->input);
1149 }
1150
1151
1152 #ifdef MULTI_PACKET
1153 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1154 unsigned char *pkt, int len)
1155 {
1156 unsigned char *buffer;
1157 int pkt_len, pos, buf_len, tmp;
1158
1159 /* process buffer */
1160 if (unlikely(usbtouch->buf_len)) {
1161 /* try to get size */
1162 pkt_len = usbtouch->type->get_pkt_len(
1163 usbtouch->buffer, usbtouch->buf_len);
1164
1165 /* drop? */
1166 if (unlikely(!pkt_len))
1167 goto out_flush_buf;
1168
1169 /* need to append -pkt_len bytes before able to get size */
1170 if (unlikely(pkt_len < 0)) {
1171 int append = -pkt_len;
1172 if (unlikely(append > len))
1173 append = len;
1174 if (usbtouch->buf_len + append >= usbtouch->type->rept_size)
1175 goto out_flush_buf;
1176 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append);
1177 usbtouch->buf_len += append;
1178
1179 pkt_len = usbtouch->type->get_pkt_len(
1180 usbtouch->buffer, usbtouch->buf_len);
1181 if (pkt_len < 0)
1182 return;
1183 }
1184
1185 /* append */
1186 tmp = pkt_len - usbtouch->buf_len;
1187 if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size)
1188 goto out_flush_buf;
1189 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp);
1190 usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len);
1191
1192 buffer = pkt + tmp;
1193 buf_len = len - tmp;
1194 } else {
1195 buffer = pkt;
1196 buf_len = len;
1197 }
1198
1199 /* loop over the received packet, process */
1200 pos = 0;
1201 while (pos < buf_len) {
1202 /* get packet len */
1203 pkt_len = usbtouch->type->get_pkt_len(buffer + pos,
1204 buf_len - pos);
1205
1206 /* unknown packet: skip one byte */
1207 if (unlikely(!pkt_len)) {
1208 pos++;
1209 continue;
1210 }
1211
1212 /* full packet: process */
1213 if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) {
1214 usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len);
1215 } else {
1216 /* incomplete packet: save in buffer */
1217 memcpy(usbtouch->buffer, buffer + pos, buf_len - pos);
1218 usbtouch->buf_len = buf_len - pos;
1219 return;
1220 }
1221 pos += pkt_len;
1222 }
1223
1224 out_flush_buf:
1225 usbtouch->buf_len = 0;
1226 return;
1227 }
1228 #endif
1229
1230
1231 static void usbtouch_irq(struct urb *urb)
1232 {
1233 struct usbtouch_usb *usbtouch = urb->context;
1234 int retval;
1235
1236 switch (urb->status) {
1237 case 0:
1238 /* success */
1239 break;
1240 case -ETIME:
1241 /* this urb is timing out */
1242 dbg("%s - urb timed out - was the device unplugged?",
1243 __func__);
1244 return;
1245 case -ECONNRESET:
1246 case -ENOENT:
1247 case -ESHUTDOWN:
1248 case -EPIPE:
1249 /* this urb is terminated, clean up */
1250 dbg("%s - urb shutting down with status: %d",
1251 __func__, urb->status);
1252 return;
1253 default:
1254 dbg("%s - nonzero urb status received: %d",
1255 __func__, urb->status);
1256 goto exit;
1257 }
1258
1259 usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length);
1260
1261 exit:
1262 retval = usb_submit_urb(urb, GFP_ATOMIC);
1263 if (retval)
1264 err("%s - usb_submit_urb failed with result: %d",
1265 __func__, retval);
1266 }
1267
1268 static int usbtouch_open(struct input_dev *input)
1269 {
1270 struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1271
1272 usbtouch->irq->dev = interface_to_usbdev(usbtouch->interface);
1273
1274 if (!usbtouch->type->irq_always) {
1275 if (usb_submit_urb(usbtouch->irq, GFP_KERNEL))
1276 return -EIO;
1277 }
1278
1279 return 0;
1280 }
1281
1282 static void usbtouch_close(struct input_dev *input)
1283 {
1284 struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1285
1286 if (!usbtouch->type->irq_always)
1287 usb_kill_urb(usbtouch->irq);
1288 }
1289
1290
1291 static void usbtouch_free_buffers(struct usb_device *udev,
1292 struct usbtouch_usb *usbtouch)
1293 {
1294 usb_buffer_free(udev, usbtouch->type->rept_size,
1295 usbtouch->data, usbtouch->data_dma);
1296 kfree(usbtouch->buffer);
1297 }
1298
1299 static struct usb_endpoint_descriptor *
1300 usbtouch_get_input_endpoint(struct usb_host_interface *interface)
1301 {
1302 int i;
1303
1304 for (i = 0; i < interface->desc.bNumEndpoints; i++)
1305 if (usb_endpoint_dir_in(&interface->endpoint[i].desc))
1306 return &interface->endpoint[i].desc;
1307
1308 return NULL;
1309 }
1310
1311 static int usbtouch_probe(struct usb_interface *intf,
1312 const struct usb_device_id *id)
1313 {
1314 struct usbtouch_usb *usbtouch;
1315 struct input_dev *input_dev;
1316 struct usb_endpoint_descriptor *endpoint;
1317 struct usb_device *udev = interface_to_usbdev(intf);
1318 struct usbtouch_device_info *type;
1319 int err = -ENOMEM;
1320
1321 /* some devices are ignored */
1322 if (id->driver_info == DEVTYPE_IGNORE)
1323 return -ENODEV;
1324
1325 endpoint = usbtouch_get_input_endpoint(intf->cur_altsetting);
1326 if (!endpoint)
1327 return -ENXIO;
1328
1329 usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL);
1330 input_dev = input_allocate_device();
1331 if (!usbtouch || !input_dev)
1332 goto out_free;
1333
1334 type = &usbtouch_dev_info[id->driver_info];
1335 usbtouch->type = type;
1336 if (!type->process_pkt)
1337 type->process_pkt = usbtouch_process_pkt;
1338
1339 usbtouch->data = usb_buffer_alloc(udev, type->rept_size,
1340 GFP_KERNEL, &usbtouch->data_dma);
1341 if (!usbtouch->data)
1342 goto out_free;
1343
1344 if (type->get_pkt_len) {
1345 usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL);
1346 if (!usbtouch->buffer)
1347 goto out_free_buffers;
1348 }
1349
1350 usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
1351 if (!usbtouch->irq) {
1352 dbg("%s - usb_alloc_urb failed: usbtouch->irq", __func__);
1353 goto out_free_buffers;
1354 }
1355
1356 usbtouch->interface = intf;
1357 usbtouch->input = input_dev;
1358
1359 if (udev->manufacturer)
1360 strlcpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name));
1361
1362 if (udev->product) {
1363 if (udev->manufacturer)
1364 strlcat(usbtouch->name, " ", sizeof(usbtouch->name));
1365 strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name));
1366 }
1367
1368 if (!strlen(usbtouch->name))
1369 snprintf(usbtouch->name, sizeof(usbtouch->name),
1370 "USB Touchscreen %04x:%04x",
1371 le16_to_cpu(udev->descriptor.idVendor),
1372 le16_to_cpu(udev->descriptor.idProduct));
1373
1374 usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys));
1375 strlcat(usbtouch->phys, "/input0", sizeof(usbtouch->phys));
1376
1377 input_dev->name = usbtouch->name;
1378 input_dev->phys = usbtouch->phys;
1379 usb_to_input_id(udev, &input_dev->id);
1380 input_dev->dev.parent = &intf->dev;
1381
1382 input_set_drvdata(input_dev, usbtouch);
1383
1384 input_dev->open = usbtouch_open;
1385 input_dev->close = usbtouch_close;
1386
1387 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
1388 input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
1389 input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0);
1390 input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0);
1391 if (type->max_press)
1392 input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press,
1393 type->max_press, 0, 0);
1394
1395 if (usb_endpoint_type(endpoint) == USB_ENDPOINT_XFER_INT)
1396 usb_fill_int_urb(usbtouch->irq, udev,
1397 usb_rcvintpipe(udev, endpoint->bEndpointAddress),
1398 usbtouch->data, type->rept_size,
1399 usbtouch_irq, usbtouch, endpoint->bInterval);
1400 else
1401 usb_fill_bulk_urb(usbtouch->irq, udev,
1402 usb_rcvbulkpipe(udev, endpoint->bEndpointAddress),
1403 usbtouch->data, type->rept_size,
1404 usbtouch_irq, usbtouch);
1405
1406 usbtouch->irq->dev = udev;
1407 usbtouch->irq->transfer_dma = usbtouch->data_dma;
1408 usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1409
1410 /* device specific init */
1411 if (type->init) {
1412 err = type->init(usbtouch);
1413 if (err) {
1414 dbg("%s - type->init() failed, err: %d", __func__, err);
1415 goto out_free_urb;
1416 }
1417 }
1418
1419 err = input_register_device(usbtouch->input);
1420 if (err) {
1421 dbg("%s - input_register_device failed, err: %d", __func__, err);
1422 goto out_do_exit;
1423 }
1424
1425 usb_set_intfdata(intf, usbtouch);
1426
1427 if (usbtouch->type->irq_always) {
1428 err = usb_submit_urb(usbtouch->irq, GFP_KERNEL);
1429 if (err) {
1430 err("%s - usb_submit_urb failed with result: %d",
1431 __func__, err);
1432 goto out_unregister_input;
1433 }
1434 }
1435
1436 return 0;
1437
1438 out_unregister_input:
1439 input_unregister_device(input_dev);
1440 input_dev = NULL;
1441 out_do_exit:
1442 if (type->exit)
1443 type->exit(usbtouch);
1444 out_free_urb:
1445 usb_free_urb(usbtouch->irq);
1446 out_free_buffers:
1447 usbtouch_free_buffers(udev, usbtouch);
1448 out_free:
1449 input_free_device(input_dev);
1450 kfree(usbtouch);
1451 return err;
1452 }
1453
1454 static void usbtouch_disconnect(struct usb_interface *intf)
1455 {
1456 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1457
1458 dbg("%s - called", __func__);
1459
1460 if (!usbtouch)
1461 return;
1462
1463 dbg("%s - usbtouch is initialized, cleaning up", __func__);
1464 usb_set_intfdata(intf, NULL);
1465 /* this will stop IO via close */
1466 input_unregister_device(usbtouch->input);
1467 usb_free_urb(usbtouch->irq);
1468 if (usbtouch->type->exit)
1469 usbtouch->type->exit(usbtouch);
1470 usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch);
1471 kfree(usbtouch);
1472 }
1473
1474 MODULE_DEVICE_TABLE(usb, usbtouch_devices);
1475
1476 static struct usb_driver usbtouch_driver = {
1477 .name = "usbtouchscreen",
1478 .probe = usbtouch_probe,
1479 .disconnect = usbtouch_disconnect,
1480 .id_table = usbtouch_devices,
1481 };
1482
1483 static int __init usbtouch_init(void)
1484 {
1485 return usb_register(&usbtouch_driver);
1486 }
1487
1488 static void __exit usbtouch_cleanup(void)
1489 {
1490 usb_deregister(&usbtouch_driver);
1491 }
1492
1493 module_init(usbtouch_init);
1494 module_exit(usbtouch_cleanup);
1495
1496 MODULE_AUTHOR(DRIVER_AUTHOR);
1497 MODULE_DESCRIPTION(DRIVER_DESC);
1498 MODULE_LICENSE("GPL");
1499
1500 MODULE_ALIAS("touchkitusb");
1501 MODULE_ALIAS("itmtouch");
1502 MODULE_ALIAS("mtouchusb");
Linux kernel - Deliverables
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