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 #include <linux/mutex.h>
58
59 static bool swap_xy;
60 module_param(swap_xy, bool, 0644);
61 MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");
62
63 static bool hwcalib_xy;
64 module_param(hwcalib_xy, bool, 0644);
65 MODULE_PARM_DESC(hwcalib_xy, "If set hw-calibrated X/Y are used if available");
66
67 /* device specifc data/functions */
68 struct usbtouch_usb;
69 struct usbtouch_device_info {
70 int min_xc, max_xc;
71 int min_yc, max_yc;
72 int min_press, max_press;
73 int rept_size;
74
75 /*
76 * Always service the USB devices irq not just when the input device is
77 * open. This is useful when devices have a watchdog which prevents us
78 * from periodically polling the device. Leave this unset unless your
79 * touchscreen device requires it, as it does consume more of the USB
80 * bandwidth.
81 */
82 bool irq_always;
83
84 void (*process_pkt) (struct usbtouch_usb *usbtouch, unsigned char *pkt, int len);
85
86 /*
87 * used to get the packet len. possible return values:
88 * > 0: packet len
89 * = 0: skip one byte
90 * < 0: -return value more bytes needed
91 */
92 int (*get_pkt_len) (unsigned char *pkt, int len);
93
94 int (*read_data) (struct usbtouch_usb *usbtouch, unsigned char *pkt);
95 int (*alloc) (struct usbtouch_usb *usbtouch);
96 int (*init) (struct usbtouch_usb *usbtouch);
97 void (*exit) (struct usbtouch_usb *usbtouch);
98 };
99
100 /* a usbtouch device */
101 struct usbtouch_usb {
102 unsigned char *data;
103 dma_addr_t data_dma;
104 int data_size;
105 unsigned char *buffer;
106 int buf_len;
107 struct urb *irq;
108 struct usb_interface *interface;
109 struct input_dev *input;
110 struct usbtouch_device_info *type;
111 struct mutex pm_mutex; /* serialize access to open/suspend */
112 bool is_open;
113 char name[128];
114 char phys[64];
115 void *priv;
116
117 int x, y;
118 int touch, press;
119 };
120
121
122 /* device types */
123 enum {
124 DEVTYPE_IGNORE = -1,
125 DEVTYPE_EGALAX,
126 DEVTYPE_PANJIT,
127 DEVTYPE_3M,
128 DEVTYPE_ITM,
129 DEVTYPE_ETURBO,
130 DEVTYPE_GUNZE,
131 DEVTYPE_DMC_TSC10,
132 DEVTYPE_IRTOUCH,
133 DEVTYPE_IRTOUCH_HIRES,
134 DEVTYPE_IDEALTEK,
135 DEVTYPE_GENERAL_TOUCH,
136 DEVTYPE_GOTOP,
137 DEVTYPE_JASTEC,
138 DEVTYPE_E2I,
139 DEVTYPE_ZYTRONIC,
140 DEVTYPE_TC45USB,
141 DEVTYPE_NEXIO,
142 DEVTYPE_ELO,
143 DEVTYPE_ETOUCH,
144 };
145
146 #define USB_DEVICE_HID_CLASS(vend, prod) \
147 .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS \
148 | USB_DEVICE_ID_MATCH_DEVICE, \
149 .idVendor = (vend), \
150 .idProduct = (prod), \
151 .bInterfaceClass = USB_INTERFACE_CLASS_HID
152
153 static const struct usb_device_id usbtouch_devices[] = {
154 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
155 /* ignore the HID capable devices, handled by usbhid */
156 {USB_DEVICE_HID_CLASS(0x0eef, 0x0001), .driver_info = DEVTYPE_IGNORE},
157 {USB_DEVICE_HID_CLASS(0x0eef, 0x0002), .driver_info = DEVTYPE_IGNORE},
158
159 /* normal device IDs */
160 {USB_DEVICE(0x3823, 0x0001), .driver_info = DEVTYPE_EGALAX},
161 {USB_DEVICE(0x3823, 0x0002), .driver_info = DEVTYPE_EGALAX},
162 {USB_DEVICE(0x0123, 0x0001), .driver_info = DEVTYPE_EGALAX},
163 {USB_DEVICE(0x0eef, 0x0001), .driver_info = DEVTYPE_EGALAX},
164 {USB_DEVICE(0x0eef, 0x0002), .driver_info = DEVTYPE_EGALAX},
165 {USB_DEVICE(0x1234, 0x0001), .driver_info = DEVTYPE_EGALAX},
166 {USB_DEVICE(0x1234, 0x0002), .driver_info = DEVTYPE_EGALAX},
167 #endif
168
169 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
170 {USB_DEVICE(0x134c, 0x0001), .driver_info = DEVTYPE_PANJIT},
171 {USB_DEVICE(0x134c, 0x0002), .driver_info = DEVTYPE_PANJIT},
172 {USB_DEVICE(0x134c, 0x0003), .driver_info = DEVTYPE_PANJIT},
173 {USB_DEVICE(0x134c, 0x0004), .driver_info = DEVTYPE_PANJIT},
174 #endif
175
176 #ifdef CONFIG_TOUCHSCREEN_USB_3M
177 {USB_DEVICE(0x0596, 0x0001), .driver_info = DEVTYPE_3M},
178 #endif
179
180 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
181 {USB_DEVICE(0x0403, 0xf9e9), .driver_info = DEVTYPE_ITM},
182 {USB_DEVICE(0x16e3, 0xf9e9), .driver_info = DEVTYPE_ITM},
183 #endif
184
185 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
186 {USB_DEVICE(0x1234, 0x5678), .driver_info = DEVTYPE_ETURBO},
187 #endif
188
189 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
190 {USB_DEVICE(0x0637, 0x0001), .driver_info = DEVTYPE_GUNZE},
191 #endif
192
193 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
194 {USB_DEVICE(0x0afa, 0x03e8), .driver_info = DEVTYPE_DMC_TSC10},
195 #endif
196
197 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
198 {USB_DEVICE(0x595a, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
199 {USB_DEVICE(0x6615, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
200 {USB_DEVICE(0x6615, 0x0012), .driver_info = DEVTYPE_IRTOUCH_HIRES},
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
443 #define MTOUCHUSB_REQ_CTRLLR_ID_LEN 16
444
mtouch_read_data(struct usbtouch_usb * dev,unsigned char * pkt)445 static int mtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
446 {
447 if (hwcalib_xy) {
448 dev->x = (pkt[4] << 8) | pkt[3];
449 dev->y = 0xffff - ((pkt[6] << 8) | pkt[5]);
450 } else {
451 dev->x = (pkt[8] << 8) | pkt[7];
452 dev->y = (pkt[10] << 8) | pkt[9];
453 }
454 dev->touch = (pkt[2] & 0x40) ? 1 : 0;
455
456 return 1;
457 }
458
459 struct mtouch_priv {
460 u8 fw_rev_major;
461 u8 fw_rev_minor;
462 };
463
mtouch_firmware_rev_show(struct device * dev,struct device_attribute * attr,char * output)464 static ssize_t mtouch_firmware_rev_show(struct device *dev,
465 struct device_attribute *attr, char *output)
466 {
467 struct usb_interface *intf = to_usb_interface(dev);
468 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
469 struct mtouch_priv *priv = usbtouch->priv;
470
471 return scnprintf(output, PAGE_SIZE, "%1x.%1x\n",
472 priv->fw_rev_major, priv->fw_rev_minor);
473 }
474 static DEVICE_ATTR(firmware_rev, 0444, mtouch_firmware_rev_show, NULL);
475
476 static struct attribute *mtouch_attrs[] = {
477 &dev_attr_firmware_rev.attr,
478 NULL
479 };
480
481 static const struct attribute_group mtouch_attr_group = {
482 .attrs = mtouch_attrs,
483 };
484
mtouch_get_fw_revision(struct usbtouch_usb * usbtouch)485 static int mtouch_get_fw_revision(struct usbtouch_usb *usbtouch)
486 {
487 struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
488 struct mtouch_priv *priv = usbtouch->priv;
489 u8 *buf;
490 int ret;
491
492 buf = kzalloc(MTOUCHUSB_REQ_CTRLLR_ID_LEN, GFP_NOIO);
493 if (!buf)
494 return -ENOMEM;
495
496 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
497 MTOUCHUSB_REQ_CTRLLR_ID,
498 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
499 0, 0, buf, MTOUCHUSB_REQ_CTRLLR_ID_LEN,
500 USB_CTRL_SET_TIMEOUT);
501 if (ret != MTOUCHUSB_REQ_CTRLLR_ID_LEN) {
502 dev_warn(&usbtouch->interface->dev,
503 "Failed to read FW rev: %d\n", ret);
504 ret = ret < 0 ? ret : -EIO;
505 goto free;
506 }
507
508 priv->fw_rev_major = buf[3];
509 priv->fw_rev_minor = buf[4];
510
511 ret = 0;
512
513 free:
514 kfree(buf);
515 return ret;
516 }
517
mtouch_alloc(struct usbtouch_usb * usbtouch)518 static int mtouch_alloc(struct usbtouch_usb *usbtouch)
519 {
520 int ret;
521
522 usbtouch->priv = kmalloc(sizeof(struct mtouch_priv), GFP_KERNEL);
523 if (!usbtouch->priv)
524 return -ENOMEM;
525
526 ret = sysfs_create_group(&usbtouch->interface->dev.kobj,
527 &mtouch_attr_group);
528 if (ret) {
529 kfree(usbtouch->priv);
530 usbtouch->priv = NULL;
531 return ret;
532 }
533
534 return 0;
535 }
536
mtouch_init(struct usbtouch_usb * usbtouch)537 static int mtouch_init(struct usbtouch_usb *usbtouch)
538 {
539 int ret, i;
540 struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
541
542 ret = mtouch_get_fw_revision(usbtouch);
543 if (ret)
544 return ret;
545
546 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
547 MTOUCHUSB_RESET,
548 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
549 1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
550 dev_dbg(&usbtouch->interface->dev,
551 "%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d\n",
552 __func__, ret);
553 if (ret < 0)
554 return ret;
555 msleep(150);
556
557 for (i = 0; i < 3; i++) {
558 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
559 MTOUCHUSB_ASYNC_REPORT,
560 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
561 1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT);
562 dev_dbg(&usbtouch->interface->dev,
563 "%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d\n",
564 __func__, ret);
565 if (ret >= 0)
566 break;
567 if (ret != -EPIPE)
568 return ret;
569 }
570
571 /* Default min/max xy are the raw values, override if using hw-calib */
572 if (hwcalib_xy) {
573 input_set_abs_params(usbtouch->input, ABS_X, 0, 0xffff, 0, 0);
574 input_set_abs_params(usbtouch->input, ABS_Y, 0, 0xffff, 0, 0);
575 }
576
577 return 0;
578 }
579
mtouch_exit(struct usbtouch_usb * usbtouch)580 static void mtouch_exit(struct usbtouch_usb *usbtouch)
581 {
582 struct mtouch_priv *priv = usbtouch->priv;
583
584 sysfs_remove_group(&usbtouch->interface->dev.kobj, &mtouch_attr_group);
585 kfree(priv);
586 }
587 #endif
588
589
590 /*****************************************************************************
591 * ITM Part
592 */
593 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
itm_read_data(struct usbtouch_usb * dev,unsigned char * pkt)594 static int itm_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
595 {
596 int touch;
597 /*
598 * ITM devices report invalid x/y data if not touched.
599 * if the screen was touched before but is not touched any more
600 * report touch as 0 with the last valid x/y data once. then stop
601 * reporting data until touched again.
602 */
603 dev->press = ((pkt[2] & 0x01) << 7) | (pkt[5] & 0x7F);
604
605 touch = ~pkt[7] & 0x20;
606 if (!touch) {
607 if (dev->touch) {
608 dev->touch = 0;
609 return 1;
610 }
611
612 return 0;
613 }
614
615 dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F);
616 dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F);
617 dev->touch = touch;
618
619 return 1;
620 }
621 #endif
622
623
624 /*****************************************************************************
625 * eTurboTouch part
626 */
627 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
628 #ifndef MULTI_PACKET
629 #define MULTI_PACKET
630 #endif
eturbo_read_data(struct usbtouch_usb * dev,unsigned char * pkt)631 static int eturbo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
632 {
633 unsigned int shift;
634
635 /* packets should start with sync */
636 if (!(pkt[0] & 0x80))
637 return 0;
638
639 shift = (6 - (pkt[0] & 0x03));
640 dev->x = ((pkt[3] << 7) | pkt[4]) >> shift;
641 dev->y = ((pkt[1] << 7) | pkt[2]) >> shift;
642 dev->touch = (pkt[0] & 0x10) ? 1 : 0;
643
644 return 1;
645 }
646
eturbo_get_pkt_len(unsigned char * buf,int len)647 static int eturbo_get_pkt_len(unsigned char *buf, int len)
648 {
649 if (buf[0] & 0x80)
650 return 5;
651 if (buf[0] == 0x01)
652 return 3;
653 return 0;
654 }
655 #endif
656
657
658 /*****************************************************************************
659 * Gunze part
660 */
661 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
gunze_read_data(struct usbtouch_usb * dev,unsigned char * pkt)662 static int gunze_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
663 {
664 if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80))
665 return 0;
666
667 dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F);
668 dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F);
669 dev->touch = pkt[0] & 0x20;
670
671 return 1;
672 }
673 #endif
674
675 /*****************************************************************************
676 * DMC TSC-10/25 Part
677 *
678 * Documentation about the controller and it's protocol can be found at
679 * http://www.dmccoltd.com/files/controler/tsc10usb_pi_e.pdf
680 * http://www.dmccoltd.com/files/controler/tsc25_usb_e.pdf
681 */
682 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
683
684 /* supported data rates. currently using 130 */
685 #define TSC10_RATE_POINT 0x50
686 #define TSC10_RATE_30 0x40
687 #define TSC10_RATE_50 0x41
688 #define TSC10_RATE_80 0x42
689 #define TSC10_RATE_100 0x43
690 #define TSC10_RATE_130 0x44
691 #define TSC10_RATE_150 0x45
692
693 /* commands */
694 #define TSC10_CMD_RESET 0x55
695 #define TSC10_CMD_RATE 0x05
696 #define TSC10_CMD_DATA1 0x01
697
dmc_tsc10_init(struct usbtouch_usb * usbtouch)698 static int dmc_tsc10_init(struct usbtouch_usb *usbtouch)
699 {
700 struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
701 int ret = -ENOMEM;
702 unsigned char *buf;
703
704 buf = kmalloc(2, GFP_NOIO);
705 if (!buf)
706 goto err_nobuf;
707 /* reset */
708 buf[0] = buf[1] = 0xFF;
709 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
710 TSC10_CMD_RESET,
711 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
712 0, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
713 if (ret < 0)
714 goto err_out;
715 if (buf[0] != 0x06) {
716 ret = -ENODEV;
717 goto err_out;
718 }
719
720 /* TSC-25 data sheet specifies a delay after the RESET command */
721 msleep(150);
722
723 /* set coordinate output rate */
724 buf[0] = buf[1] = 0xFF;
725 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
726 TSC10_CMD_RATE,
727 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
728 TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
729 if (ret < 0)
730 goto err_out;
731 if ((buf[0] != 0x06) && (buf[0] != 0x15 || buf[1] != 0x01)) {
732 ret = -ENODEV;
733 goto err_out;
734 }
735
736 /* start sending data */
737 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
738 TSC10_CMD_DATA1,
739 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
740 0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
741 err_out:
742 kfree(buf);
743 err_nobuf:
744 return ret;
745 }
746
747
dmc_tsc10_read_data(struct usbtouch_usb * dev,unsigned char * pkt)748 static int dmc_tsc10_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
749 {
750 dev->x = ((pkt[2] & 0x03) << 8) | pkt[1];
751 dev->y = ((pkt[4] & 0x03) << 8) | pkt[3];
752 dev->touch = pkt[0] & 0x01;
753
754 return 1;
755 }
756 #endif
757
758
759 /*****************************************************************************
760 * IRTOUCH Part
761 */
762 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
irtouch_read_data(struct usbtouch_usb * dev,unsigned char * pkt)763 static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
764 {
765 dev->x = (pkt[3] << 8) | pkt[2];
766 dev->y = (pkt[5] << 8) | pkt[4];
767 dev->touch = (pkt[1] & 0x03) ? 1 : 0;
768
769 return 1;
770 }
771 #endif
772
773 /*****************************************************************************
774 * ET&T TC5UH/TC4UM part
775 */
776 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
tc45usb_read_data(struct usbtouch_usb * dev,unsigned char * pkt)777 static int tc45usb_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
778 {
779 dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
780 dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
781 dev->touch = pkt[0] & 0x01;
782
783 return 1;
784 }
785 #endif
786
787 /*****************************************************************************
788 * IdealTEK URTC1000 Part
789 */
790 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
791 #ifndef MULTI_PACKET
792 #define MULTI_PACKET
793 #endif
idealtek_get_pkt_len(unsigned char * buf,int len)794 static int idealtek_get_pkt_len(unsigned char *buf, int len)
795 {
796 if (buf[0] & 0x80)
797 return 5;
798 if (buf[0] == 0x01)
799 return len;
800 return 0;
801 }
802
idealtek_read_data(struct usbtouch_usb * dev,unsigned char * pkt)803 static int idealtek_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
804 {
805 switch (pkt[0] & 0x98) {
806 case 0x88:
807 /* touch data in IdealTEK mode */
808 dev->x = (pkt[1] << 5) | (pkt[2] >> 2);
809 dev->y = (pkt[3] << 5) | (pkt[4] >> 2);
810 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
811 return 1;
812
813 case 0x98:
814 /* touch data in MT emulation mode */
815 dev->x = (pkt[2] << 5) | (pkt[1] >> 2);
816 dev->y = (pkt[4] << 5) | (pkt[3] >> 2);
817 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
818 return 1;
819
820 default:
821 return 0;
822 }
823 }
824 #endif
825
826 /*****************************************************************************
827 * General Touch Part
828 */
829 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
general_touch_read_data(struct usbtouch_usb * dev,unsigned char * pkt)830 static int general_touch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
831 {
832 dev->x = (pkt[2] << 8) | pkt[1];
833 dev->y = (pkt[4] << 8) | pkt[3];
834 dev->press = pkt[5] & 0xff;
835 dev->touch = pkt[0] & 0x01;
836
837 return 1;
838 }
839 #endif
840
841 /*****************************************************************************
842 * GoTop Part
843 */
844 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
gotop_read_data(struct usbtouch_usb * dev,unsigned char * pkt)845 static int gotop_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
846 {
847 dev->x = ((pkt[1] & 0x38) << 4) | pkt[2];
848 dev->y = ((pkt[1] & 0x07) << 7) | pkt[3];
849 dev->touch = pkt[0] & 0x01;
850
851 return 1;
852 }
853 #endif
854
855 /*****************************************************************************
856 * JASTEC Part
857 */
858 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
jastec_read_data(struct usbtouch_usb * dev,unsigned char * pkt)859 static int jastec_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
860 {
861 dev->x = ((pkt[0] & 0x3f) << 6) | (pkt[2] & 0x3f);
862 dev->y = ((pkt[1] & 0x3f) << 6) | (pkt[3] & 0x3f);
863 dev->touch = (pkt[0] & 0x40) >> 6;
864
865 return 1;
866 }
867 #endif
868
869 /*****************************************************************************
870 * Zytronic Part
871 */
872 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
zytronic_read_data(struct usbtouch_usb * dev,unsigned char * pkt)873 static int zytronic_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
874 {
875 struct usb_interface *intf = dev->interface;
876
877 switch (pkt[0]) {
878 case 0x3A: /* command response */
879 dev_dbg(&intf->dev, "%s: Command response %d\n", __func__, pkt[1]);
880 break;
881
882 case 0xC0: /* down */
883 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
884 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
885 dev->touch = 1;
886 dev_dbg(&intf->dev, "%s: down %d,%d\n", __func__, dev->x, dev->y);
887 return 1;
888
889 case 0x80: /* up */
890 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
891 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
892 dev->touch = 0;
893 dev_dbg(&intf->dev, "%s: up %d,%d\n", __func__, dev->x, dev->y);
894 return 1;
895
896 default:
897 dev_dbg(&intf->dev, "%s: Unknown return %d\n", __func__, pkt[0]);
898 break;
899 }
900
901 return 0;
902 }
903 #endif
904
905 /*****************************************************************************
906 * NEXIO Part
907 */
908 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
909
910 #define NEXIO_TIMEOUT 5000
911 #define NEXIO_BUFSIZE 1024
912 #define NEXIO_THRESHOLD 50
913
914 struct nexio_priv {
915 struct urb *ack;
916 unsigned char *ack_buf;
917 };
918
919 struct nexio_touch_packet {
920 u8 flags; /* 0xe1 = touch, 0xe1 = release */
921 __be16 data_len; /* total bytes of touch data */
922 __be16 x_len; /* bytes for X axis */
923 __be16 y_len; /* bytes for Y axis */
924 u8 data[];
925 } __attribute__ ((packed));
926
927 static unsigned char nexio_ack_pkt[2] = { 0xaa, 0x02 };
928 static unsigned char nexio_init_pkt[4] = { 0x82, 0x04, 0x0a, 0x0f };
929
nexio_ack_complete(struct urb * urb)930 static void nexio_ack_complete(struct urb *urb)
931 {
932 }
933
nexio_alloc(struct usbtouch_usb * usbtouch)934 static int nexio_alloc(struct usbtouch_usb *usbtouch)
935 {
936 struct nexio_priv *priv;
937 int ret = -ENOMEM;
938
939 usbtouch->priv = kmalloc(sizeof(struct nexio_priv), GFP_KERNEL);
940 if (!usbtouch->priv)
941 goto out_buf;
942
943 priv = usbtouch->priv;
944
945 priv->ack_buf = kmemdup(nexio_ack_pkt, sizeof(nexio_ack_pkt),
946 GFP_KERNEL);
947 if (!priv->ack_buf)
948 goto err_priv;
949
950 priv->ack = usb_alloc_urb(0, GFP_KERNEL);
951 if (!priv->ack) {
952 dev_dbg(&usbtouch->interface->dev,
953 "%s - usb_alloc_urb failed: usbtouch->ack\n", __func__);
954 goto err_ack_buf;
955 }
956
957 return 0;
958
959 err_ack_buf:
960 kfree(priv->ack_buf);
961 err_priv:
962 kfree(priv);
963 out_buf:
964 return ret;
965 }
966
nexio_init(struct usbtouch_usb * usbtouch)967 static int nexio_init(struct usbtouch_usb *usbtouch)
968 {
969 struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
970 struct usb_host_interface *interface = usbtouch->interface->cur_altsetting;
971 struct nexio_priv *priv = usbtouch->priv;
972 int ret = -ENOMEM;
973 int actual_len, i;
974 unsigned char *buf;
975 char *firmware_ver = NULL, *device_name = NULL;
976 int input_ep = 0, output_ep = 0;
977
978 /* find first input and output endpoint */
979 for (i = 0; i < interface->desc.bNumEndpoints; i++) {
980 if (!input_ep &&
981 usb_endpoint_dir_in(&interface->endpoint[i].desc))
982 input_ep = interface->endpoint[i].desc.bEndpointAddress;
983 if (!output_ep &&
984 usb_endpoint_dir_out(&interface->endpoint[i].desc))
985 output_ep = interface->endpoint[i].desc.bEndpointAddress;
986 }
987 if (!input_ep || !output_ep)
988 return -ENXIO;
989
990 buf = kmalloc(NEXIO_BUFSIZE, GFP_NOIO);
991 if (!buf)
992 goto out_buf;
993
994 /* two empty reads */
995 for (i = 0; i < 2; i++) {
996 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
997 buf, NEXIO_BUFSIZE, &actual_len,
998 NEXIO_TIMEOUT);
999 if (ret < 0)
1000 goto out_buf;
1001 }
1002
1003 /* send init command */
1004 memcpy(buf, nexio_init_pkt, sizeof(nexio_init_pkt));
1005 ret = usb_bulk_msg(dev, usb_sndbulkpipe(dev, output_ep),
1006 buf, sizeof(nexio_init_pkt), &actual_len,
1007 NEXIO_TIMEOUT);
1008 if (ret < 0)
1009 goto out_buf;
1010
1011 /* read replies */
1012 for (i = 0; i < 3; i++) {
1013 memset(buf, 0, NEXIO_BUFSIZE);
1014 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
1015 buf, NEXIO_BUFSIZE, &actual_len,
1016 NEXIO_TIMEOUT);
1017 if (ret < 0 || actual_len < 1 || buf[1] != actual_len)
1018 continue;
1019 switch (buf[0]) {
1020 case 0x83: /* firmware version */
1021 if (!firmware_ver)
1022 firmware_ver = kstrdup(&buf[2], GFP_NOIO);
1023 break;
1024 case 0x84: /* device name */
1025 if (!device_name)
1026 device_name = kstrdup(&buf[2], GFP_NOIO);
1027 break;
1028 }
1029 }
1030
1031 printk(KERN_INFO "Nexio device: %s, firmware version: %s\n",
1032 device_name, firmware_ver);
1033
1034 kfree(firmware_ver);
1035 kfree(device_name);
1036
1037 usb_fill_bulk_urb(priv->ack, dev, usb_sndbulkpipe(dev, output_ep),
1038 priv->ack_buf, sizeof(nexio_ack_pkt),
1039 nexio_ack_complete, usbtouch);
1040 ret = 0;
1041
1042 out_buf:
1043 kfree(buf);
1044 return ret;
1045 }
1046
nexio_exit(struct usbtouch_usb * usbtouch)1047 static void nexio_exit(struct usbtouch_usb *usbtouch)
1048 {
1049 struct nexio_priv *priv = usbtouch->priv;
1050
1051 usb_kill_urb(priv->ack);
1052 usb_free_urb(priv->ack);
1053 kfree(priv->ack_buf);
1054 kfree(priv);
1055 }
1056
nexio_read_data(struct usbtouch_usb * usbtouch,unsigned char * pkt)1057 static int nexio_read_data(struct usbtouch_usb *usbtouch, unsigned char *pkt)
1058 {
1059 struct nexio_touch_packet *packet = (void *) pkt;
1060 struct nexio_priv *priv = usbtouch->priv;
1061 unsigned int data_len = be16_to_cpu(packet->data_len);
1062 unsigned int x_len = be16_to_cpu(packet->x_len);
1063 unsigned int y_len = be16_to_cpu(packet->y_len);
1064 int x, y, begin_x, begin_y, end_x, end_y, w, h, ret;
1065
1066 /* got touch data? */
1067 if ((pkt[0] & 0xe0) != 0xe0)
1068 return 0;
1069
1070 if (data_len > 0xff)
1071 data_len -= 0x100;
1072 if (x_len > 0xff)
1073 x_len -= 0x80;
1074
1075 /* send ACK */
1076 ret = usb_submit_urb(priv->ack, GFP_ATOMIC);
1077
1078 if (!usbtouch->type->max_xc) {
1079 usbtouch->type->max_xc = 2 * x_len;
1080 input_set_abs_params(usbtouch->input, ABS_X,
1081 0, usbtouch->type->max_xc, 0, 0);
1082 usbtouch->type->max_yc = 2 * y_len;
1083 input_set_abs_params(usbtouch->input, ABS_Y,
1084 0, usbtouch->type->max_yc, 0, 0);
1085 }
1086 /*
1087 * The device reports state of IR sensors on X and Y axes.
1088 * Each byte represents "darkness" percentage (0-100) of one element.
1089 * 17" touchscreen reports only 64 x 52 bytes so the resolution is low.
1090 * This also means that there's a limited multi-touch capability but
1091 * it's disabled (and untested) here as there's no X driver for that.
1092 */
1093 begin_x = end_x = begin_y = end_y = -1;
1094 for (x = 0; x < x_len; x++) {
1095 if (begin_x == -1 && packet->data[x] > NEXIO_THRESHOLD) {
1096 begin_x = x;
1097 continue;
1098 }
1099 if (end_x == -1 && begin_x != -1 && packet->data[x] < NEXIO_THRESHOLD) {
1100 end_x = x - 1;
1101 for (y = x_len; y < data_len; y++) {
1102 if (begin_y == -1 && packet->data[y] > NEXIO_THRESHOLD) {
1103 begin_y = y - x_len;
1104 continue;
1105 }
1106 if (end_y == -1 &&
1107 begin_y != -1 && packet->data[y] < NEXIO_THRESHOLD) {
1108 end_y = y - 1 - x_len;
1109 w = end_x - begin_x;
1110 h = end_y - begin_y;
1111 #if 0
1112 /* multi-touch */
1113 input_report_abs(usbtouch->input,
1114 ABS_MT_TOUCH_MAJOR, max(w,h));
1115 input_report_abs(usbtouch->input,
1116 ABS_MT_TOUCH_MINOR, min(x,h));
1117 input_report_abs(usbtouch->input,
1118 ABS_MT_POSITION_X, 2*begin_x+w);
1119 input_report_abs(usbtouch->input,
1120 ABS_MT_POSITION_Y, 2*begin_y+h);
1121 input_report_abs(usbtouch->input,
1122 ABS_MT_ORIENTATION, w > h);
1123 input_mt_sync(usbtouch->input);
1124 #endif
1125 /* single touch */
1126 usbtouch->x = 2 * begin_x + w;
1127 usbtouch->y = 2 * begin_y + h;
1128 usbtouch->touch = packet->flags & 0x01;
1129 begin_y = end_y = -1;
1130 return 1;
1131 }
1132 }
1133 begin_x = end_x = -1;
1134 }
1135
1136 }
1137 return 0;
1138 }
1139 #endif
1140
1141
1142 /*****************************************************************************
1143 * ELO part
1144 */
1145
1146 #ifdef CONFIG_TOUCHSCREEN_USB_ELO
1147
elo_read_data(struct usbtouch_usb * dev,unsigned char * pkt)1148 static int elo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
1149 {
1150 dev->x = (pkt[3] << 8) | pkt[2];
1151 dev->y = (pkt[5] << 8) | pkt[4];
1152 dev->touch = pkt[6] > 0;
1153 dev->press = pkt[6];
1154
1155 return 1;
1156 }
1157 #endif
1158
1159
1160 /*****************************************************************************
1161 * the different device descriptors
1162 */
1163 #ifdef MULTI_PACKET
1164 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1165 unsigned char *pkt, int len);
1166 #endif
1167
1168 static struct usbtouch_device_info usbtouch_dev_info[] = {
1169 #ifdef CONFIG_TOUCHSCREEN_USB_ELO
1170 [DEVTYPE_ELO] = {
1171 .min_xc = 0x0,
1172 .max_xc = 0x0fff,
1173 .min_yc = 0x0,
1174 .max_yc = 0x0fff,
1175 .max_press = 0xff,
1176 .rept_size = 8,
1177 .read_data = elo_read_data,
1178 },
1179 #endif
1180
1181 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
1182 [DEVTYPE_EGALAX] = {
1183 .min_xc = 0x0,
1184 .max_xc = 0x07ff,
1185 .min_yc = 0x0,
1186 .max_yc = 0x07ff,
1187 .rept_size = 16,
1188 .process_pkt = usbtouch_process_multi,
1189 .get_pkt_len = egalax_get_pkt_len,
1190 .read_data = egalax_read_data,
1191 .init = egalax_init,
1192 },
1193 #endif
1194
1195 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
1196 [DEVTYPE_PANJIT] = {
1197 .min_xc = 0x0,
1198 .max_xc = 0x0fff,
1199 .min_yc = 0x0,
1200 .max_yc = 0x0fff,
1201 .rept_size = 8,
1202 .read_data = panjit_read_data,
1203 },
1204 #endif
1205
1206 #ifdef CONFIG_TOUCHSCREEN_USB_3M
1207 [DEVTYPE_3M] = {
1208 .min_xc = 0x0,
1209 .max_xc = 0x4000,
1210 .min_yc = 0x0,
1211 .max_yc = 0x4000,
1212 .rept_size = 11,
1213 .read_data = mtouch_read_data,
1214 .alloc = mtouch_alloc,
1215 .init = mtouch_init,
1216 .exit = mtouch_exit,
1217 },
1218 #endif
1219
1220 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
1221 [DEVTYPE_ITM] = {
1222 .min_xc = 0x0,
1223 .max_xc = 0x0fff,
1224 .min_yc = 0x0,
1225 .max_yc = 0x0fff,
1226 .max_press = 0xff,
1227 .rept_size = 8,
1228 .read_data = itm_read_data,
1229 },
1230 #endif
1231
1232 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
1233 [DEVTYPE_ETURBO] = {
1234 .min_xc = 0x0,
1235 .max_xc = 0x07ff,
1236 .min_yc = 0x0,
1237 .max_yc = 0x07ff,
1238 .rept_size = 8,
1239 .process_pkt = usbtouch_process_multi,
1240 .get_pkt_len = eturbo_get_pkt_len,
1241 .read_data = eturbo_read_data,
1242 },
1243 #endif
1244
1245 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
1246 [DEVTYPE_GUNZE] = {
1247 .min_xc = 0x0,
1248 .max_xc = 0x0fff,
1249 .min_yc = 0x0,
1250 .max_yc = 0x0fff,
1251 .rept_size = 4,
1252 .read_data = gunze_read_data,
1253 },
1254 #endif
1255
1256 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
1257 [DEVTYPE_DMC_TSC10] = {
1258 .min_xc = 0x0,
1259 .max_xc = 0x03ff,
1260 .min_yc = 0x0,
1261 .max_yc = 0x03ff,
1262 .rept_size = 5,
1263 .init = dmc_tsc10_init,
1264 .read_data = dmc_tsc10_read_data,
1265 },
1266 #endif
1267
1268 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
1269 [DEVTYPE_IRTOUCH] = {
1270 .min_xc = 0x0,
1271 .max_xc = 0x0fff,
1272 .min_yc = 0x0,
1273 .max_yc = 0x0fff,
1274 .rept_size = 8,
1275 .read_data = irtouch_read_data,
1276 },
1277
1278 [DEVTYPE_IRTOUCH_HIRES] = {
1279 .min_xc = 0x0,
1280 .max_xc = 0x7fff,
1281 .min_yc = 0x0,
1282 .max_yc = 0x7fff,
1283 .rept_size = 8,
1284 .read_data = irtouch_read_data,
1285 },
1286 #endif
1287
1288 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
1289 [DEVTYPE_IDEALTEK] = {
1290 .min_xc = 0x0,
1291 .max_xc = 0x0fff,
1292 .min_yc = 0x0,
1293 .max_yc = 0x0fff,
1294 .rept_size = 8,
1295 .process_pkt = usbtouch_process_multi,
1296 .get_pkt_len = idealtek_get_pkt_len,
1297 .read_data = idealtek_read_data,
1298 },
1299 #endif
1300
1301 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
1302 [DEVTYPE_GENERAL_TOUCH] = {
1303 .min_xc = 0x0,
1304 .max_xc = 0x7fff,
1305 .min_yc = 0x0,
1306 .max_yc = 0x7fff,
1307 .rept_size = 7,
1308 .read_data = general_touch_read_data,
1309 },
1310 #endif
1311
1312 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
1313 [DEVTYPE_GOTOP] = {
1314 .min_xc = 0x0,
1315 .max_xc = 0x03ff,
1316 .min_yc = 0x0,
1317 .max_yc = 0x03ff,
1318 .rept_size = 4,
1319 .read_data = gotop_read_data,
1320 },
1321 #endif
1322
1323 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
1324 [DEVTYPE_JASTEC] = {
1325 .min_xc = 0x0,
1326 .max_xc = 0x0fff,
1327 .min_yc = 0x0,
1328 .max_yc = 0x0fff,
1329 .rept_size = 4,
1330 .read_data = jastec_read_data,
1331 },
1332 #endif
1333
1334 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
1335 [DEVTYPE_E2I] = {
1336 .min_xc = 0x0,
1337 .max_xc = 0x7fff,
1338 .min_yc = 0x0,
1339 .max_yc = 0x7fff,
1340 .rept_size = 6,
1341 .init = e2i_init,
1342 .read_data = e2i_read_data,
1343 },
1344 #endif
1345
1346 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
1347 [DEVTYPE_ZYTRONIC] = {
1348 .min_xc = 0x0,
1349 .max_xc = 0x03ff,
1350 .min_yc = 0x0,
1351 .max_yc = 0x03ff,
1352 .rept_size = 5,
1353 .read_data = zytronic_read_data,
1354 .irq_always = true,
1355 },
1356 #endif
1357
1358 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
1359 [DEVTYPE_TC45USB] = {
1360 .min_xc = 0x0,
1361 .max_xc = 0x0fff,
1362 .min_yc = 0x0,
1363 .max_yc = 0x0fff,
1364 .rept_size = 5,
1365 .read_data = tc45usb_read_data,
1366 },
1367 #endif
1368
1369 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
1370 [DEVTYPE_NEXIO] = {
1371 .rept_size = 1024,
1372 .irq_always = true,
1373 .read_data = nexio_read_data,
1374 .alloc = nexio_alloc,
1375 .init = nexio_init,
1376 .exit = nexio_exit,
1377 },
1378 #endif
1379 #ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
1380 [DEVTYPE_ETOUCH] = {
1381 .min_xc = 0x0,
1382 .max_xc = 0x07ff,
1383 .min_yc = 0x0,
1384 .max_yc = 0x07ff,
1385 .rept_size = 16,
1386 .process_pkt = usbtouch_process_multi,
1387 .get_pkt_len = etouch_get_pkt_len,
1388 .read_data = etouch_read_data,
1389 },
1390 #endif
1391 };
1392
1393
1394 /*****************************************************************************
1395 * Generic Part
1396 */
usbtouch_process_pkt(struct usbtouch_usb * usbtouch,unsigned char * pkt,int len)1397 static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
1398 unsigned char *pkt, int len)
1399 {
1400 struct usbtouch_device_info *type = usbtouch->type;
1401
1402 if (!type->read_data(usbtouch, pkt))
1403 return;
1404
1405 input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch);
1406
1407 if (swap_xy) {
1408 input_report_abs(usbtouch->input, ABS_X, usbtouch->y);
1409 input_report_abs(usbtouch->input, ABS_Y, usbtouch->x);
1410 } else {
1411 input_report_abs(usbtouch->input, ABS_X, usbtouch->x);
1412 input_report_abs(usbtouch->input, ABS_Y, usbtouch->y);
1413 }
1414 if (type->max_press)
1415 input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press);
1416 input_sync(usbtouch->input);
1417 }
1418
1419
1420 #ifdef MULTI_PACKET
usbtouch_process_multi(struct usbtouch_usb * usbtouch,unsigned char * pkt,int len)1421 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1422 unsigned char *pkt, int len)
1423 {
1424 unsigned char *buffer;
1425 int pkt_len, pos, buf_len, tmp;
1426
1427 /* process buffer */
1428 if (unlikely(usbtouch->buf_len)) {
1429 /* try to get size */
1430 pkt_len = usbtouch->type->get_pkt_len(
1431 usbtouch->buffer, usbtouch->buf_len);
1432
1433 /* drop? */
1434 if (unlikely(!pkt_len))
1435 goto out_flush_buf;
1436
1437 /* need to append -pkt_len bytes before able to get size */
1438 if (unlikely(pkt_len < 0)) {
1439 int append = -pkt_len;
1440 if (unlikely(append > len))
1441 append = len;
1442 if (usbtouch->buf_len + append >= usbtouch->type->rept_size)
1443 goto out_flush_buf;
1444 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append);
1445 usbtouch->buf_len += append;
1446
1447 pkt_len = usbtouch->type->get_pkt_len(
1448 usbtouch->buffer, usbtouch->buf_len);
1449 if (pkt_len < 0)
1450 return;
1451 }
1452
1453 /* append */
1454 tmp = pkt_len - usbtouch->buf_len;
1455 if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size)
1456 goto out_flush_buf;
1457 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp);
1458 usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len);
1459
1460 buffer = pkt + tmp;
1461 buf_len = len - tmp;
1462 } else {
1463 buffer = pkt;
1464 buf_len = len;
1465 }
1466
1467 /* loop over the received packet, process */
1468 pos = 0;
1469 while (pos < buf_len) {
1470 /* get packet len */
1471 pkt_len = usbtouch->type->get_pkt_len(buffer + pos,
1472 buf_len - pos);
1473
1474 /* unknown packet: skip one byte */
1475 if (unlikely(!pkt_len)) {
1476 pos++;
1477 continue;
1478 }
1479
1480 /* full packet: process */
1481 if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) {
1482 usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len);
1483 } else {
1484 /* incomplete packet: save in buffer */
1485 memcpy(usbtouch->buffer, buffer + pos, buf_len - pos);
1486 usbtouch->buf_len = buf_len - pos;
1487 return;
1488 }
1489 pos += pkt_len;
1490 }
1491
1492 out_flush_buf:
1493 usbtouch->buf_len = 0;
1494 return;
1495 }
1496 #endif
1497
1498
usbtouch_irq(struct urb * urb)1499 static void usbtouch_irq(struct urb *urb)
1500 {
1501 struct usbtouch_usb *usbtouch = urb->context;
1502 struct device *dev = &usbtouch->interface->dev;
1503 int retval;
1504
1505 switch (urb->status) {
1506 case 0:
1507 /* success */
1508 break;
1509 case -ETIME:
1510 /* this urb is timing out */
1511 dev_dbg(dev,
1512 "%s - urb timed out - was the device unplugged?\n",
1513 __func__);
1514 return;
1515 case -ECONNRESET:
1516 case -ENOENT:
1517 case -ESHUTDOWN:
1518 case -EPIPE:
1519 /* this urb is terminated, clean up */
1520 dev_dbg(dev, "%s - urb shutting down with status: %d\n",
1521 __func__, urb->status);
1522 return;
1523 default:
1524 dev_dbg(dev, "%s - nonzero urb status received: %d\n",
1525 __func__, urb->status);
1526 goto exit;
1527 }
1528
1529 usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length);
1530
1531 exit:
1532 usb_mark_last_busy(interface_to_usbdev(usbtouch->interface));
1533 retval = usb_submit_urb(urb, GFP_ATOMIC);
1534 if (retval)
1535 dev_err(dev, "%s - usb_submit_urb failed with result: %d\n",
1536 __func__, retval);
1537 }
1538
usbtouch_open(struct input_dev * input)1539 static int usbtouch_open(struct input_dev *input)
1540 {
1541 struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1542 int r;
1543
1544 usbtouch->irq->dev = interface_to_usbdev(usbtouch->interface);
1545
1546 r = usb_autopm_get_interface(usbtouch->interface) ? -EIO : 0;
1547 if (r < 0)
1548 goto out;
1549
1550 mutex_lock(&usbtouch->pm_mutex);
1551 if (!usbtouch->type->irq_always) {
1552 if (usb_submit_urb(usbtouch->irq, GFP_KERNEL)) {
1553 r = -EIO;
1554 goto out_put;
1555 }
1556 }
1557
1558 usbtouch->interface->needs_remote_wakeup = 1;
1559 usbtouch->is_open = true;
1560 out_put:
1561 mutex_unlock(&usbtouch->pm_mutex);
1562 usb_autopm_put_interface(usbtouch->interface);
1563 out:
1564 return r;
1565 }
1566
usbtouch_close(struct input_dev * input)1567 static void usbtouch_close(struct input_dev *input)
1568 {
1569 struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1570 int r;
1571
1572 mutex_lock(&usbtouch->pm_mutex);
1573 if (!usbtouch->type->irq_always)
1574 usb_kill_urb(usbtouch->irq);
1575 usbtouch->is_open = false;
1576 mutex_unlock(&usbtouch->pm_mutex);
1577
1578 r = usb_autopm_get_interface(usbtouch->interface);
1579 usbtouch->interface->needs_remote_wakeup = 0;
1580 if (!r)
1581 usb_autopm_put_interface(usbtouch->interface);
1582 }
1583
usbtouch_suspend(struct usb_interface * intf,pm_message_t message)1584 static int usbtouch_suspend
1585 (struct usb_interface *intf, pm_message_t message)
1586 {
1587 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1588
1589 usb_kill_urb(usbtouch->irq);
1590
1591 return 0;
1592 }
1593
usbtouch_resume(struct usb_interface * intf)1594 static int usbtouch_resume(struct usb_interface *intf)
1595 {
1596 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1597 int result = 0;
1598
1599 mutex_lock(&usbtouch->pm_mutex);
1600 if (usbtouch->is_open || usbtouch->type->irq_always)
1601 result = usb_submit_urb(usbtouch->irq, GFP_NOIO);
1602 mutex_unlock(&usbtouch->pm_mutex);
1603
1604 return result;
1605 }
1606
usbtouch_reset_resume(struct usb_interface * intf)1607 static int usbtouch_reset_resume(struct usb_interface *intf)
1608 {
1609 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1610 int err = 0;
1611
1612 /* reinit the device */
1613 if (usbtouch->type->init) {
1614 err = usbtouch->type->init(usbtouch);
1615 if (err) {
1616 dev_dbg(&intf->dev,
1617 "%s - type->init() failed, err: %d\n",
1618 __func__, err);
1619 return err;
1620 }
1621 }
1622
1623 /* restart IO if needed */
1624 mutex_lock(&usbtouch->pm_mutex);
1625 if (usbtouch->is_open)
1626 err = usb_submit_urb(usbtouch->irq, GFP_NOIO);
1627 mutex_unlock(&usbtouch->pm_mutex);
1628
1629 return err;
1630 }
1631
usbtouch_free_buffers(struct usb_device * udev,struct usbtouch_usb * usbtouch)1632 static void usbtouch_free_buffers(struct usb_device *udev,
1633 struct usbtouch_usb *usbtouch)
1634 {
1635 usb_free_coherent(udev, usbtouch->data_size,
1636 usbtouch->data, usbtouch->data_dma);
1637 kfree(usbtouch->buffer);
1638 }
1639
1640 static struct usb_endpoint_descriptor *
usbtouch_get_input_endpoint(struct usb_host_interface * interface)1641 usbtouch_get_input_endpoint(struct usb_host_interface *interface)
1642 {
1643 int i;
1644
1645 for (i = 0; i < interface->desc.bNumEndpoints; i++)
1646 if (usb_endpoint_dir_in(&interface->endpoint[i].desc))
1647 return &interface->endpoint[i].desc;
1648
1649 return NULL;
1650 }
1651
usbtouch_probe(struct usb_interface * intf,const struct usb_device_id * id)1652 static int usbtouch_probe(struct usb_interface *intf,
1653 const struct usb_device_id *id)
1654 {
1655 struct usbtouch_usb *usbtouch;
1656 struct input_dev *input_dev;
1657 struct usb_endpoint_descriptor *endpoint;
1658 struct usb_device *udev = interface_to_usbdev(intf);
1659 struct usbtouch_device_info *type;
1660 int err = -ENOMEM;
1661
1662 /* some devices are ignored */
1663 if (id->driver_info == DEVTYPE_IGNORE)
1664 return -ENODEV;
1665
1666 endpoint = usbtouch_get_input_endpoint(intf->cur_altsetting);
1667 if (!endpoint)
1668 return -ENXIO;
1669
1670 usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL);
1671 input_dev = input_allocate_device();
1672 if (!usbtouch || !input_dev)
1673 goto out_free;
1674
1675 type = &usbtouch_dev_info[id->driver_info];
1676 usbtouch->type = type;
1677 if (!type->process_pkt)
1678 type->process_pkt = usbtouch_process_pkt;
1679
1680 usbtouch->data_size = type->rept_size;
1681 if (type->get_pkt_len) {
1682 /*
1683 * When dealing with variable-length packets we should
1684 * not request more than wMaxPacketSize bytes at once
1685 * as we do not know if there is more data coming or
1686 * we filled exactly wMaxPacketSize bytes and there is
1687 * nothing else.
1688 */
1689 usbtouch->data_size = min(usbtouch->data_size,
1690 usb_endpoint_maxp(endpoint));
1691 }
1692
1693 usbtouch->data = usb_alloc_coherent(udev, usbtouch->data_size,
1694 GFP_KERNEL, &usbtouch->data_dma);
1695 if (!usbtouch->data)
1696 goto out_free;
1697
1698 if (type->get_pkt_len) {
1699 usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL);
1700 if (!usbtouch->buffer)
1701 goto out_free_buffers;
1702 }
1703
1704 usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
1705 if (!usbtouch->irq) {
1706 dev_dbg(&intf->dev,
1707 "%s - usb_alloc_urb failed: usbtouch->irq\n", __func__);
1708 goto out_free_buffers;
1709 }
1710
1711 usbtouch->interface = intf;
1712 usbtouch->input = input_dev;
1713
1714 if (udev->manufacturer)
1715 strlcpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name));
1716
1717 if (udev->product) {
1718 if (udev->manufacturer)
1719 strlcat(usbtouch->name, " ", sizeof(usbtouch->name));
1720 strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name));
1721 }
1722
1723 if (!strlen(usbtouch->name))
1724 snprintf(usbtouch->name, sizeof(usbtouch->name),
1725 "USB Touchscreen %04x:%04x",
1726 le16_to_cpu(udev->descriptor.idVendor),
1727 le16_to_cpu(udev->descriptor.idProduct));
1728
1729 usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys));
1730 strlcat(usbtouch->phys, "/input0", sizeof(usbtouch->phys));
1731
1732 input_dev->name = usbtouch->name;
1733 input_dev->phys = usbtouch->phys;
1734 usb_to_input_id(udev, &input_dev->id);
1735 input_dev->dev.parent = &intf->dev;
1736
1737 input_set_drvdata(input_dev, usbtouch);
1738
1739 input_dev->open = usbtouch_open;
1740 input_dev->close = usbtouch_close;
1741
1742 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
1743 input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
1744 input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0);
1745 input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0);
1746 if (type->max_press)
1747 input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press,
1748 type->max_press, 0, 0);
1749
1750 if (usb_endpoint_type(endpoint) == USB_ENDPOINT_XFER_INT)
1751 usb_fill_int_urb(usbtouch->irq, udev,
1752 usb_rcvintpipe(udev, endpoint->bEndpointAddress),
1753 usbtouch->data, usbtouch->data_size,
1754 usbtouch_irq, usbtouch, endpoint->bInterval);
1755 else
1756 usb_fill_bulk_urb(usbtouch->irq, udev,
1757 usb_rcvbulkpipe(udev, endpoint->bEndpointAddress),
1758 usbtouch->data, usbtouch->data_size,
1759 usbtouch_irq, usbtouch);
1760
1761 usbtouch->irq->dev = udev;
1762 usbtouch->irq->transfer_dma = usbtouch->data_dma;
1763 usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1764
1765 /* device specific allocations */
1766 if (type->alloc) {
1767 err = type->alloc(usbtouch);
1768 if (err) {
1769 dev_dbg(&intf->dev,
1770 "%s - type->alloc() failed, err: %d\n",
1771 __func__, err);
1772 goto out_free_urb;
1773 }
1774 }
1775
1776 /* device specific initialisation*/
1777 if (type->init) {
1778 err = type->init(usbtouch);
1779 if (err) {
1780 dev_dbg(&intf->dev,
1781 "%s - type->init() failed, err: %d\n",
1782 __func__, err);
1783 goto out_do_exit;
1784 }
1785 }
1786
1787 err = input_register_device(usbtouch->input);
1788 if (err) {
1789 dev_dbg(&intf->dev,
1790 "%s - input_register_device failed, err: %d\n",
1791 __func__, err);
1792 goto out_do_exit;
1793 }
1794
1795 usb_set_intfdata(intf, usbtouch);
1796
1797 if (usbtouch->type->irq_always) {
1798 /* this can't fail */
1799 usb_autopm_get_interface(intf);
1800 err = usb_submit_urb(usbtouch->irq, GFP_KERNEL);
1801 if (err) {
1802 usb_autopm_put_interface(intf);
1803 dev_err(&intf->dev,
1804 "%s - usb_submit_urb failed with result: %d\n",
1805 __func__, err);
1806 goto out_unregister_input;
1807 }
1808 }
1809
1810 return 0;
1811
1812 out_unregister_input:
1813 input_unregister_device(input_dev);
1814 input_dev = NULL;
1815 out_do_exit:
1816 if (type->exit)
1817 type->exit(usbtouch);
1818 out_free_urb:
1819 usb_free_urb(usbtouch->irq);
1820 out_free_buffers:
1821 usbtouch_free_buffers(udev, usbtouch);
1822 out_free:
1823 input_free_device(input_dev);
1824 kfree(usbtouch);
1825 return err;
1826 }
1827
usbtouch_disconnect(struct usb_interface * intf)1828 static void usbtouch_disconnect(struct usb_interface *intf)
1829 {
1830 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1831
1832 if (!usbtouch)
1833 return;
1834
1835 dev_dbg(&intf->dev,
1836 "%s - usbtouch is initialized, cleaning up\n", __func__);
1837
1838 usb_set_intfdata(intf, NULL);
1839 /* this will stop IO via close */
1840 input_unregister_device(usbtouch->input);
1841 usb_free_urb(usbtouch->irq);
1842 if (usbtouch->type->exit)
1843 usbtouch->type->exit(usbtouch);
1844 usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch);
1845 kfree(usbtouch);
1846 }
1847
1848 MODULE_DEVICE_TABLE(usb, usbtouch_devices);
1849
1850 static struct usb_driver usbtouch_driver = {
1851 .name = "usbtouchscreen",
1852 .probe = usbtouch_probe,
1853 .disconnect = usbtouch_disconnect,
1854 .suspend = usbtouch_suspend,
1855 .resume = usbtouch_resume,
1856 .reset_resume = usbtouch_reset_resume,
1857 .id_table = usbtouch_devices,
1858 .supports_autosuspend = 1,
1859 };
1860
1861 module_usb_driver(usbtouch_driver);
1862
1863 MODULE_AUTHOR("Daniel Ritz <daniel.ritz@gmx.ch>");
1864 MODULE_DESCRIPTION("USB Touchscreen Driver");
1865 MODULE_LICENSE("GPL");
1866
1867 MODULE_ALIAS("touchkitusb");
1868 MODULE_ALIAS("itmtouch");
1869 MODULE_ALIAS("mtouchusb");
1870
