1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /******************************************************************************
3 * usbtouchscreen.c
4 * Driver for USB Touchscreens, supporting those devices:
5 * - eGalax Touchkit
6 * includes eTurboTouch CT-410/510/700
7 * - 3M/Microtouch EX II series
8 * - ITM
9 * - PanJit TouchSet
10 * - eTurboTouch
11 * - Gunze AHL61
12 * - DMC TSC-10/25
13 * - IRTOUCHSYSTEMS/UNITOP
14 * - IdealTEK URTC1000
15 * - General Touch
16 * - GoTop Super_Q2/GogoPen/PenPower tablets
17 * - JASTEC USB touch controller/DigiTech DTR-02U
18 * - Zytronic capacitive touchscreen
19 * - NEXIO/iNexio
20 * - Elo TouchSystems 2700 IntelliTouch
21 * - EasyTouch USB Dual/Multi touch controller from Data Modul
22 *
23 * Copyright (C) 2004-2007 by Daniel Ritz <daniel.ritz@gmx.ch>
24 * Copyright (C) by Todd E. Johnson (mtouchusb.c)
25 *
26 * Driver is based on touchkitusb.c
27 * - ITM parts are from itmtouch.c
28 * - 3M parts are from mtouchusb.c
29 * - PanJit parts are from an unmerged driver by Lanslott Gish
30 * - DMC TSC 10/25 are from Holger Schurig, with ideas from an unmerged
31 * driver from Marius Vollmer
32 *
33 *****************************************************************************/
34
35 //#define DEBUG
36
37 #include <linux/kernel.h>
38 #include <linux/slab.h>
39 #include <linux/input.h>
40 #include <linux/module.h>
41 #include <linux/usb.h>
42 #include <linux/usb/input.h>
43 #include <linux/hid.h>
44 #include <linux/mutex.h>
45
46 static bool swap_xy;
47 module_param(swap_xy, bool, 0644);
48 MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");
49
50 static bool hwcalib_xy;
51 module_param(hwcalib_xy, bool, 0644);
52 MODULE_PARM_DESC(hwcalib_xy, "If set hw-calibrated X/Y are used if available");
53
54 /* device specifc data/functions */
55 struct usbtouch_usb;
56 struct usbtouch_device_info {
57 int min_xc, max_xc;
58 int min_yc, max_yc;
59 int min_press, max_press;
60 int rept_size;
61
62 /*
63 * Always service the USB devices irq not just when the input device is
64 * open. This is useful when devices have a watchdog which prevents us
65 * from periodically polling the device. Leave this unset unless your
66 * touchscreen device requires it, as it does consume more of the USB
67 * bandwidth.
68 */
69 bool irq_always;
70
71 void (*process_pkt) (struct usbtouch_usb *usbtouch, unsigned char *pkt, int len);
72
73 /*
74 * used to get the packet len. possible return values:
75 * > 0: packet len
76 * = 0: skip one byte
77 * < 0: -return value more bytes needed
78 */
79 int (*get_pkt_len) (unsigned char *pkt, int len);
80
81 int (*read_data) (struct usbtouch_usb *usbtouch, unsigned char *pkt);
82 int (*alloc) (struct usbtouch_usb *usbtouch);
83 int (*init) (struct usbtouch_usb *usbtouch);
84 void (*exit) (struct usbtouch_usb *usbtouch);
85 };
86
87 /* a usbtouch device */
88 struct usbtouch_usb {
89 unsigned char *data;
90 dma_addr_t data_dma;
91 int data_size;
92 unsigned char *buffer;
93 int buf_len;
94 struct urb *irq;
95 struct usb_interface *interface;
96 struct input_dev *input;
97 struct usbtouch_device_info *type;
98 struct mutex pm_mutex; /* serialize access to open/suspend */
99 bool is_open;
100 char name[128];
101 char phys[64];
102 void *priv;
103
104 int x, y;
105 int touch, press;
106 };
107
108
109 /* device types */
110 enum {
111 DEVTYPE_IGNORE = -1,
112 DEVTYPE_EGALAX,
113 DEVTYPE_PANJIT,
114 DEVTYPE_3M,
115 DEVTYPE_ITM,
116 DEVTYPE_ETURBO,
117 DEVTYPE_GUNZE,
118 DEVTYPE_DMC_TSC10,
119 DEVTYPE_IRTOUCH,
120 DEVTYPE_IRTOUCH_HIRES,
121 DEVTYPE_IDEALTEK,
122 DEVTYPE_GENERAL_TOUCH,
123 DEVTYPE_GOTOP,
124 DEVTYPE_JASTEC,
125 DEVTYPE_E2I,
126 DEVTYPE_ZYTRONIC,
127 DEVTYPE_TC45USB,
128 DEVTYPE_NEXIO,
129 DEVTYPE_ELO,
130 DEVTYPE_ETOUCH,
131 };
132
133 #define USB_DEVICE_HID_CLASS(vend, prod) \
134 .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS \
135 | USB_DEVICE_ID_MATCH_DEVICE, \
136 .idVendor = (vend), \
137 .idProduct = (prod), \
138 .bInterfaceClass = USB_INTERFACE_CLASS_HID
139
140 static const struct usb_device_id usbtouch_devices[] = {
141 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
142 /* ignore the HID capable devices, handled by usbhid */
143 {USB_DEVICE_HID_CLASS(0x0eef, 0x0001), .driver_info = DEVTYPE_IGNORE},
144 {USB_DEVICE_HID_CLASS(0x0eef, 0x0002), .driver_info = DEVTYPE_IGNORE},
145
146 /* normal device IDs */
147 {USB_DEVICE(0x3823, 0x0001), .driver_info = DEVTYPE_EGALAX},
148 {USB_DEVICE(0x3823, 0x0002), .driver_info = DEVTYPE_EGALAX},
149 {USB_DEVICE(0x0123, 0x0001), .driver_info = DEVTYPE_EGALAX},
150 {USB_DEVICE(0x0eef, 0x0001), .driver_info = DEVTYPE_EGALAX},
151 {USB_DEVICE(0x0eef, 0x0002), .driver_info = DEVTYPE_EGALAX},
152 {USB_DEVICE(0x1234, 0x0001), .driver_info = DEVTYPE_EGALAX},
153 {USB_DEVICE(0x1234, 0x0002), .driver_info = DEVTYPE_EGALAX},
154 #endif
155
156 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
157 {USB_DEVICE(0x134c, 0x0001), .driver_info = DEVTYPE_PANJIT},
158 {USB_DEVICE(0x134c, 0x0002), .driver_info = DEVTYPE_PANJIT},
159 {USB_DEVICE(0x134c, 0x0003), .driver_info = DEVTYPE_PANJIT},
160 {USB_DEVICE(0x134c, 0x0004), .driver_info = DEVTYPE_PANJIT},
161 #endif
162
163 #ifdef CONFIG_TOUCHSCREEN_USB_3M
164 {USB_DEVICE(0x0596, 0x0001), .driver_info = DEVTYPE_3M},
165 #endif
166
167 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
168 {USB_DEVICE(0x0403, 0xf9e9), .driver_info = DEVTYPE_ITM},
169 {USB_DEVICE(0x16e3, 0xf9e9), .driver_info = DEVTYPE_ITM},
170 #endif
171
172 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
173 {USB_DEVICE(0x1234, 0x5678), .driver_info = DEVTYPE_ETURBO},
174 #endif
175
176 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
177 {USB_DEVICE(0x0637, 0x0001), .driver_info = DEVTYPE_GUNZE},
178 #endif
179
180 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
181 {USB_DEVICE(0x0afa, 0x03e8), .driver_info = DEVTYPE_DMC_TSC10},
182 #endif
183
184 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
185 {USB_DEVICE(0x255e, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
186 {USB_DEVICE(0x595a, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
187 {USB_DEVICE(0x6615, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
188 {USB_DEVICE(0x6615, 0x0012), .driver_info = DEVTYPE_IRTOUCH_HIRES},
189 #endif
190
191 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
192 {USB_DEVICE(0x1391, 0x1000), .driver_info = DEVTYPE_IDEALTEK},
193 #endif
194
195 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
196 {USB_DEVICE(0x0dfc, 0x0001), .driver_info = DEVTYPE_GENERAL_TOUCH},
197 #endif
198
199 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
200 {USB_DEVICE(0x08f2, 0x007f), .driver_info = DEVTYPE_GOTOP},
201 {USB_DEVICE(0x08f2, 0x00ce), .driver_info = DEVTYPE_GOTOP},
202 {USB_DEVICE(0x08f2, 0x00f4), .driver_info = DEVTYPE_GOTOP},
203 #endif
204
205 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
206 {USB_DEVICE(0x0f92, 0x0001), .driver_info = DEVTYPE_JASTEC},
207 #endif
208
209 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
210 {USB_DEVICE(0x1ac7, 0x0001), .driver_info = DEVTYPE_E2I},
211 #endif
212
213 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
214 {USB_DEVICE(0x14c8, 0x0003), .driver_info = DEVTYPE_ZYTRONIC},
215 #endif
216
217 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
218 /* TC5UH */
219 {USB_DEVICE(0x0664, 0x0309), .driver_info = DEVTYPE_TC45USB},
220 /* TC4UM */
221 {USB_DEVICE(0x0664, 0x0306), .driver_info = DEVTYPE_TC45USB},
222 #endif
223
224 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
225 /* data interface only */
226 {USB_DEVICE_AND_INTERFACE_INFO(0x10f0, 0x2002, 0x0a, 0x00, 0x00),
227 .driver_info = DEVTYPE_NEXIO},
228 {USB_DEVICE_AND_INTERFACE_INFO(0x1870, 0x0001, 0x0a, 0x00, 0x00),
229 .driver_info = DEVTYPE_NEXIO},
230 #endif
231
232 #ifdef CONFIG_TOUCHSCREEN_USB_ELO
233 {USB_DEVICE(0x04e7, 0x0020), .driver_info = DEVTYPE_ELO},
234 #endif
235
236 #ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
237 {USB_DEVICE(0x7374, 0x0001), .driver_info = DEVTYPE_ETOUCH},
238 #endif
239
240 {}
241 };
242
243
244 /*****************************************************************************
245 * e2i Part
246 */
247
248 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
e2i_init(struct usbtouch_usb * usbtouch)249 static int e2i_init(struct usbtouch_usb *usbtouch)
250 {
251 int ret;
252 struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
253
254 ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
255 0x01, 0x02, 0x0000, 0x0081,
256 NULL, 0, USB_CTRL_SET_TIMEOUT);
257
258 dev_dbg(&usbtouch->interface->dev,
259 "%s - usb_control_msg - E2I_RESET - bytes|err: %d\n",
260 __func__, ret);
261 return ret;
262 }
263
e2i_read_data(struct usbtouch_usb * dev,unsigned char * pkt)264 static int e2i_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
265 {
266 int tmp = (pkt[0] << 8) | pkt[1];
267 dev->x = (pkt[2] << 8) | pkt[3];
268 dev->y = (pkt[4] << 8) | pkt[5];
269
270 tmp = tmp - 0xA000;
271 dev->touch = (tmp > 0);
272 dev->press = (tmp > 0 ? tmp : 0);
273
274 return 1;
275 }
276 #endif
277
278
279 /*****************************************************************************
280 * eGalax part
281 */
282
283 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
284
285 #ifndef MULTI_PACKET
286 #define MULTI_PACKET
287 #endif
288
289 #define EGALAX_PKT_TYPE_MASK 0xFE
290 #define EGALAX_PKT_TYPE_REPT 0x80
291 #define EGALAX_PKT_TYPE_DIAG 0x0A
292
egalax_init(struct usbtouch_usb * usbtouch)293 static int egalax_init(struct usbtouch_usb *usbtouch)
294 {
295 int ret, i;
296 unsigned char *buf;
297 struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
298
299 /*
300 * An eGalax diagnostic packet kicks the device into using the right
301 * protocol. We send a "check active" packet. The response will be
302 * read later and ignored.
303 */
304
305 buf = kmalloc(3, GFP_KERNEL);
306 if (!buf)
307 return -ENOMEM;
308
309 buf[0] = EGALAX_PKT_TYPE_DIAG;
310 buf[1] = 1; /* length */
311 buf[2] = 'A'; /* command - check active */
312
313 for (i = 0; i < 3; i++) {
314 ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
315 0,
316 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
317 0, 0, buf, 3,
318 USB_CTRL_SET_TIMEOUT);
319 if (ret >= 0) {
320 ret = 0;
321 break;
322 }
323 if (ret != -EPIPE)
324 break;
325 }
326
327 kfree(buf);
328
329 return ret;
330 }
331
egalax_read_data(struct usbtouch_usb * dev,unsigned char * pkt)332 static int egalax_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
333 {
334 if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT)
335 return 0;
336
337 dev->x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F);
338 dev->y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F);
339 dev->touch = pkt[0] & 0x01;
340
341 return 1;
342 }
343
egalax_get_pkt_len(unsigned char * buf,int len)344 static int egalax_get_pkt_len(unsigned char *buf, int len)
345 {
346 switch (buf[0] & EGALAX_PKT_TYPE_MASK) {
347 case EGALAX_PKT_TYPE_REPT:
348 return 5;
349
350 case EGALAX_PKT_TYPE_DIAG:
351 if (len < 2)
352 return -1;
353
354 return buf[1] + 2;
355 }
356
357 return 0;
358 }
359 #endif
360
361 /*****************************************************************************
362 * EasyTouch part
363 */
364
365 #ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
366
367 #ifndef MULTI_PACKET
368 #define MULTI_PACKET
369 #endif
370
371 #define ETOUCH_PKT_TYPE_MASK 0xFE
372 #define ETOUCH_PKT_TYPE_REPT 0x80
373 #define ETOUCH_PKT_TYPE_REPT2 0xB0
374 #define ETOUCH_PKT_TYPE_DIAG 0x0A
375
etouch_read_data(struct usbtouch_usb * dev,unsigned char * pkt)376 static int etouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
377 {
378 if ((pkt[0] & ETOUCH_PKT_TYPE_MASK) != ETOUCH_PKT_TYPE_REPT &&
379 (pkt[0] & ETOUCH_PKT_TYPE_MASK) != ETOUCH_PKT_TYPE_REPT2)
380 return 0;
381
382 dev->x = ((pkt[1] & 0x1F) << 7) | (pkt[2] & 0x7F);
383 dev->y = ((pkt[3] & 0x1F) << 7) | (pkt[4] & 0x7F);
384 dev->touch = pkt[0] & 0x01;
385
386 return 1;
387 }
388
etouch_get_pkt_len(unsigned char * buf,int len)389 static int etouch_get_pkt_len(unsigned char *buf, int len)
390 {
391 switch (buf[0] & ETOUCH_PKT_TYPE_MASK) {
392 case ETOUCH_PKT_TYPE_REPT:
393 case ETOUCH_PKT_TYPE_REPT2:
394 return 5;
395
396 case ETOUCH_PKT_TYPE_DIAG:
397 if (len < 2)
398 return -1;
399
400 return buf[1] + 2;
401 }
402
403 return 0;
404 }
405 #endif
406
407 /*****************************************************************************
408 * PanJit Part
409 */
410 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
panjit_read_data(struct usbtouch_usb * dev,unsigned char * pkt)411 static int panjit_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
412 {
413 dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
414 dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
415 dev->touch = pkt[0] & 0x01;
416
417 return 1;
418 }
419 #endif
420
421
422 /*****************************************************************************
423 * 3M/Microtouch Part
424 */
425 #ifdef CONFIG_TOUCHSCREEN_USB_3M
426
427 #define MTOUCHUSB_ASYNC_REPORT 1
428 #define MTOUCHUSB_RESET 7
429 #define MTOUCHUSB_REQ_CTRLLR_ID 10
430
431 #define MTOUCHUSB_REQ_CTRLLR_ID_LEN 16
432
mtouch_read_data(struct usbtouch_usb * dev,unsigned char * pkt)433 static int mtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
434 {
435 if (hwcalib_xy) {
436 dev->x = (pkt[4] << 8) | pkt[3];
437 dev->y = 0xffff - ((pkt[6] << 8) | pkt[5]);
438 } else {
439 dev->x = (pkt[8] << 8) | pkt[7];
440 dev->y = (pkt[10] << 8) | pkt[9];
441 }
442 dev->touch = (pkt[2] & 0x40) ? 1 : 0;
443
444 return 1;
445 }
446
447 struct mtouch_priv {
448 u8 fw_rev_major;
449 u8 fw_rev_minor;
450 };
451
mtouch_firmware_rev_show(struct device * dev,struct device_attribute * attr,char * output)452 static ssize_t mtouch_firmware_rev_show(struct device *dev,
453 struct device_attribute *attr, char *output)
454 {
455 struct usb_interface *intf = to_usb_interface(dev);
456 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
457 struct mtouch_priv *priv = usbtouch->priv;
458
459 return scnprintf(output, PAGE_SIZE, "%1x.%1x\n",
460 priv->fw_rev_major, priv->fw_rev_minor);
461 }
462 static DEVICE_ATTR(firmware_rev, 0444, mtouch_firmware_rev_show, NULL);
463
464 static struct attribute *mtouch_attrs[] = {
465 &dev_attr_firmware_rev.attr,
466 NULL
467 };
468
469 static const struct attribute_group mtouch_attr_group = {
470 .attrs = mtouch_attrs,
471 };
472
mtouch_get_fw_revision(struct usbtouch_usb * usbtouch)473 static int mtouch_get_fw_revision(struct usbtouch_usb *usbtouch)
474 {
475 struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
476 struct mtouch_priv *priv = usbtouch->priv;
477 u8 *buf;
478 int ret;
479
480 buf = kzalloc(MTOUCHUSB_REQ_CTRLLR_ID_LEN, GFP_NOIO);
481 if (!buf)
482 return -ENOMEM;
483
484 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
485 MTOUCHUSB_REQ_CTRLLR_ID,
486 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
487 0, 0, buf, MTOUCHUSB_REQ_CTRLLR_ID_LEN,
488 USB_CTRL_SET_TIMEOUT);
489 if (ret != MTOUCHUSB_REQ_CTRLLR_ID_LEN) {
490 dev_warn(&usbtouch->interface->dev,
491 "Failed to read FW rev: %d\n", ret);
492 ret = ret < 0 ? ret : -EIO;
493 goto free;
494 }
495
496 priv->fw_rev_major = buf[3];
497 priv->fw_rev_minor = buf[4];
498
499 ret = 0;
500
501 free:
502 kfree(buf);
503 return ret;
504 }
505
mtouch_alloc(struct usbtouch_usb * usbtouch)506 static int mtouch_alloc(struct usbtouch_usb *usbtouch)
507 {
508 int ret;
509
510 usbtouch->priv = kmalloc(sizeof(struct mtouch_priv), GFP_KERNEL);
511 if (!usbtouch->priv)
512 return -ENOMEM;
513
514 ret = sysfs_create_group(&usbtouch->interface->dev.kobj,
515 &mtouch_attr_group);
516 if (ret) {
517 kfree(usbtouch->priv);
518 usbtouch->priv = NULL;
519 return ret;
520 }
521
522 return 0;
523 }
524
mtouch_init(struct usbtouch_usb * usbtouch)525 static int mtouch_init(struct usbtouch_usb *usbtouch)
526 {
527 int ret, i;
528 struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
529
530 ret = mtouch_get_fw_revision(usbtouch);
531 if (ret)
532 return ret;
533
534 ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
535 MTOUCHUSB_RESET,
536 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
537 1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
538 dev_dbg(&usbtouch->interface->dev,
539 "%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d\n",
540 __func__, ret);
541 if (ret < 0)
542 return ret;
543 msleep(150);
544
545 for (i = 0; i < 3; i++) {
546 ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
547 MTOUCHUSB_ASYNC_REPORT,
548 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
549 1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT);
550 dev_dbg(&usbtouch->interface->dev,
551 "%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d\n",
552 __func__, ret);
553 if (ret >= 0)
554 break;
555 if (ret != -EPIPE)
556 return ret;
557 }
558
559 /* Default min/max xy are the raw values, override if using hw-calib */
560 if (hwcalib_xy) {
561 input_set_abs_params(usbtouch->input, ABS_X, 0, 0xffff, 0, 0);
562 input_set_abs_params(usbtouch->input, ABS_Y, 0, 0xffff, 0, 0);
563 }
564
565 return 0;
566 }
567
mtouch_exit(struct usbtouch_usb * usbtouch)568 static void mtouch_exit(struct usbtouch_usb *usbtouch)
569 {
570 struct mtouch_priv *priv = usbtouch->priv;
571
572 sysfs_remove_group(&usbtouch->interface->dev.kobj, &mtouch_attr_group);
573 kfree(priv);
574 }
575 #endif
576
577
578 /*****************************************************************************
579 * ITM Part
580 */
581 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
itm_read_data(struct usbtouch_usb * dev,unsigned char * pkt)582 static int itm_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
583 {
584 int touch;
585 /*
586 * ITM devices report invalid x/y data if not touched.
587 * if the screen was touched before but is not touched any more
588 * report touch as 0 with the last valid x/y data once. then stop
589 * reporting data until touched again.
590 */
591 dev->press = ((pkt[2] & 0x01) << 7) | (pkt[5] & 0x7F);
592
593 touch = ~pkt[7] & 0x20;
594 if (!touch) {
595 if (dev->touch) {
596 dev->touch = 0;
597 return 1;
598 }
599
600 return 0;
601 }
602
603 dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F);
604 dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F);
605 dev->touch = touch;
606
607 return 1;
608 }
609 #endif
610
611
612 /*****************************************************************************
613 * eTurboTouch part
614 */
615 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
616 #ifndef MULTI_PACKET
617 #define MULTI_PACKET
618 #endif
eturbo_read_data(struct usbtouch_usb * dev,unsigned char * pkt)619 static int eturbo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
620 {
621 unsigned int shift;
622
623 /* packets should start with sync */
624 if (!(pkt[0] & 0x80))
625 return 0;
626
627 shift = (6 - (pkt[0] & 0x03));
628 dev->x = ((pkt[3] << 7) | pkt[4]) >> shift;
629 dev->y = ((pkt[1] << 7) | pkt[2]) >> shift;
630 dev->touch = (pkt[0] & 0x10) ? 1 : 0;
631
632 return 1;
633 }
634
eturbo_get_pkt_len(unsigned char * buf,int len)635 static int eturbo_get_pkt_len(unsigned char *buf, int len)
636 {
637 if (buf[0] & 0x80)
638 return 5;
639 if (buf[0] == 0x01)
640 return 3;
641 return 0;
642 }
643 #endif
644
645
646 /*****************************************************************************
647 * Gunze part
648 */
649 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
gunze_read_data(struct usbtouch_usb * dev,unsigned char * pkt)650 static int gunze_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
651 {
652 if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80))
653 return 0;
654
655 dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F);
656 dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F);
657 dev->touch = pkt[0] & 0x20;
658
659 return 1;
660 }
661 #endif
662
663 /*****************************************************************************
664 * DMC TSC-10/25 Part
665 *
666 * Documentation about the controller and it's protocol can be found at
667 * http://www.dmccoltd.com/files/controler/tsc10usb_pi_e.pdf
668 * http://www.dmccoltd.com/files/controler/tsc25_usb_e.pdf
669 */
670 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
671
672 /* supported data rates. currently using 130 */
673 #define TSC10_RATE_POINT 0x50
674 #define TSC10_RATE_30 0x40
675 #define TSC10_RATE_50 0x41
676 #define TSC10_RATE_80 0x42
677 #define TSC10_RATE_100 0x43
678 #define TSC10_RATE_130 0x44
679 #define TSC10_RATE_150 0x45
680
681 /* commands */
682 #define TSC10_CMD_RESET 0x55
683 #define TSC10_CMD_RATE 0x05
684 #define TSC10_CMD_DATA1 0x01
685
dmc_tsc10_init(struct usbtouch_usb * usbtouch)686 static int dmc_tsc10_init(struct usbtouch_usb *usbtouch)
687 {
688 struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
689 int ret = -ENOMEM;
690 unsigned char *buf;
691
692 buf = kmalloc(2, GFP_NOIO);
693 if (!buf)
694 goto err_nobuf;
695 /* reset */
696 buf[0] = buf[1] = 0xFF;
697 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
698 TSC10_CMD_RESET,
699 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
700 0, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
701 if (ret < 0)
702 goto err_out;
703 if (buf[0] != 0x06) {
704 ret = -ENODEV;
705 goto err_out;
706 }
707
708 /* TSC-25 data sheet specifies a delay after the RESET command */
709 msleep(150);
710
711 /* set coordinate output rate */
712 buf[0] = buf[1] = 0xFF;
713 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
714 TSC10_CMD_RATE,
715 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
716 TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
717 if (ret < 0)
718 goto err_out;
719 if ((buf[0] != 0x06) && (buf[0] != 0x15 || buf[1] != 0x01)) {
720 ret = -ENODEV;
721 goto err_out;
722 }
723
724 /* start sending data */
725 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
726 TSC10_CMD_DATA1,
727 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
728 0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
729 err_out:
730 kfree(buf);
731 err_nobuf:
732 return ret;
733 }
734
735
dmc_tsc10_read_data(struct usbtouch_usb * dev,unsigned char * pkt)736 static int dmc_tsc10_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
737 {
738 dev->x = ((pkt[2] & 0x03) << 8) | pkt[1];
739 dev->y = ((pkt[4] & 0x03) << 8) | pkt[3];
740 dev->touch = pkt[0] & 0x01;
741
742 return 1;
743 }
744 #endif
745
746
747 /*****************************************************************************
748 * IRTOUCH Part
749 */
750 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
irtouch_read_data(struct usbtouch_usb * dev,unsigned char * pkt)751 static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
752 {
753 dev->x = (pkt[3] << 8) | pkt[2];
754 dev->y = (pkt[5] << 8) | pkt[4];
755 dev->touch = (pkt[1] & 0x03) ? 1 : 0;
756
757 return 1;
758 }
759 #endif
760
761 /*****************************************************************************
762 * ET&T TC5UH/TC4UM part
763 */
764 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
tc45usb_read_data(struct usbtouch_usb * dev,unsigned char * pkt)765 static int tc45usb_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
766 {
767 dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
768 dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
769 dev->touch = pkt[0] & 0x01;
770
771 return 1;
772 }
773 #endif
774
775 /*****************************************************************************
776 * IdealTEK URTC1000 Part
777 */
778 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
779 #ifndef MULTI_PACKET
780 #define MULTI_PACKET
781 #endif
idealtek_get_pkt_len(unsigned char * buf,int len)782 static int idealtek_get_pkt_len(unsigned char *buf, int len)
783 {
784 if (buf[0] & 0x80)
785 return 5;
786 if (buf[0] == 0x01)
787 return len;
788 return 0;
789 }
790
idealtek_read_data(struct usbtouch_usb * dev,unsigned char * pkt)791 static int idealtek_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
792 {
793 switch (pkt[0] & 0x98) {
794 case 0x88:
795 /* touch data in IdealTEK mode */
796 dev->x = (pkt[1] << 5) | (pkt[2] >> 2);
797 dev->y = (pkt[3] << 5) | (pkt[4] >> 2);
798 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
799 return 1;
800
801 case 0x98:
802 /* touch data in MT emulation mode */
803 dev->x = (pkt[2] << 5) | (pkt[1] >> 2);
804 dev->y = (pkt[4] << 5) | (pkt[3] >> 2);
805 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
806 return 1;
807
808 default:
809 return 0;
810 }
811 }
812 #endif
813
814 /*****************************************************************************
815 * General Touch Part
816 */
817 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
general_touch_read_data(struct usbtouch_usb * dev,unsigned char * pkt)818 static int general_touch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
819 {
820 dev->x = (pkt[2] << 8) | pkt[1];
821 dev->y = (pkt[4] << 8) | pkt[3];
822 dev->press = pkt[5] & 0xff;
823 dev->touch = pkt[0] & 0x01;
824
825 return 1;
826 }
827 #endif
828
829 /*****************************************************************************
830 * GoTop Part
831 */
832 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
gotop_read_data(struct usbtouch_usb * dev,unsigned char * pkt)833 static int gotop_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
834 {
835 dev->x = ((pkt[1] & 0x38) << 4) | pkt[2];
836 dev->y = ((pkt[1] & 0x07) << 7) | pkt[3];
837 dev->touch = pkt[0] & 0x01;
838
839 return 1;
840 }
841 #endif
842
843 /*****************************************************************************
844 * JASTEC Part
845 */
846 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
jastec_read_data(struct usbtouch_usb * dev,unsigned char * pkt)847 static int jastec_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
848 {
849 dev->x = ((pkt[0] & 0x3f) << 6) | (pkt[2] & 0x3f);
850 dev->y = ((pkt[1] & 0x3f) << 6) | (pkt[3] & 0x3f);
851 dev->touch = (pkt[0] & 0x40) >> 6;
852
853 return 1;
854 }
855 #endif
856
857 /*****************************************************************************
858 * Zytronic Part
859 */
860 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
zytronic_read_data(struct usbtouch_usb * dev,unsigned char * pkt)861 static int zytronic_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
862 {
863 struct usb_interface *intf = dev->interface;
864
865 switch (pkt[0]) {
866 case 0x3A: /* command response */
867 dev_dbg(&intf->dev, "%s: Command response %d\n", __func__, pkt[1]);
868 break;
869
870 case 0xC0: /* down */
871 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
872 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
873 dev->touch = 1;
874 dev_dbg(&intf->dev, "%s: down %d,%d\n", __func__, dev->x, dev->y);
875 return 1;
876
877 case 0x80: /* up */
878 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
879 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
880 dev->touch = 0;
881 dev_dbg(&intf->dev, "%s: up %d,%d\n", __func__, dev->x, dev->y);
882 return 1;
883
884 default:
885 dev_dbg(&intf->dev, "%s: Unknown return %d\n", __func__, pkt[0]);
886 break;
887 }
888
889 return 0;
890 }
891 #endif
892
893 /*****************************************************************************
894 * NEXIO Part
895 */
896 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
897
898 #define NEXIO_TIMEOUT 5000
899 #define NEXIO_BUFSIZE 1024
900 #define NEXIO_THRESHOLD 50
901
902 struct nexio_priv {
903 struct urb *ack;
904 unsigned char *ack_buf;
905 };
906
907 struct nexio_touch_packet {
908 u8 flags; /* 0xe1 = touch, 0xe1 = release */
909 __be16 data_len; /* total bytes of touch data */
910 __be16 x_len; /* bytes for X axis */
911 __be16 y_len; /* bytes for Y axis */
912 u8 data[];
913 } __attribute__ ((packed));
914
915 static unsigned char nexio_ack_pkt[2] = { 0xaa, 0x02 };
916 static unsigned char nexio_init_pkt[4] = { 0x82, 0x04, 0x0a, 0x0f };
917
nexio_ack_complete(struct urb * urb)918 static void nexio_ack_complete(struct urb *urb)
919 {
920 }
921
nexio_alloc(struct usbtouch_usb * usbtouch)922 static int nexio_alloc(struct usbtouch_usb *usbtouch)
923 {
924 struct nexio_priv *priv;
925 int ret = -ENOMEM;
926
927 usbtouch->priv = kmalloc(sizeof(struct nexio_priv), GFP_KERNEL);
928 if (!usbtouch->priv)
929 goto out_buf;
930
931 priv = usbtouch->priv;
932
933 priv->ack_buf = kmemdup(nexio_ack_pkt, sizeof(nexio_ack_pkt),
934 GFP_KERNEL);
935 if (!priv->ack_buf)
936 goto err_priv;
937
938 priv->ack = usb_alloc_urb(0, GFP_KERNEL);
939 if (!priv->ack) {
940 dev_dbg(&usbtouch->interface->dev,
941 "%s - usb_alloc_urb failed: usbtouch->ack\n", __func__);
942 goto err_ack_buf;
943 }
944
945 return 0;
946
947 err_ack_buf:
948 kfree(priv->ack_buf);
949 err_priv:
950 kfree(priv);
951 out_buf:
952 return ret;
953 }
954
nexio_init(struct usbtouch_usb * usbtouch)955 static int nexio_init(struct usbtouch_usb *usbtouch)
956 {
957 struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
958 struct usb_host_interface *interface = usbtouch->interface->cur_altsetting;
959 struct nexio_priv *priv = usbtouch->priv;
960 int ret = -ENOMEM;
961 int actual_len, i;
962 unsigned char *buf;
963 char *firmware_ver = NULL, *device_name = NULL;
964 int input_ep = 0, output_ep = 0;
965
966 /* find first input and output endpoint */
967 for (i = 0; i < interface->desc.bNumEndpoints; i++) {
968 if (!input_ep &&
969 usb_endpoint_dir_in(&interface->endpoint[i].desc))
970 input_ep = interface->endpoint[i].desc.bEndpointAddress;
971 if (!output_ep &&
972 usb_endpoint_dir_out(&interface->endpoint[i].desc))
973 output_ep = interface->endpoint[i].desc.bEndpointAddress;
974 }
975 if (!input_ep || !output_ep)
976 return -ENXIO;
977
978 buf = kmalloc(NEXIO_BUFSIZE, GFP_NOIO);
979 if (!buf)
980 goto out_buf;
981
982 /* two empty reads */
983 for (i = 0; i < 2; i++) {
984 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
985 buf, NEXIO_BUFSIZE, &actual_len,
986 NEXIO_TIMEOUT);
987 if (ret < 0)
988 goto out_buf;
989 }
990
991 /* send init command */
992 memcpy(buf, nexio_init_pkt, sizeof(nexio_init_pkt));
993 ret = usb_bulk_msg(dev, usb_sndbulkpipe(dev, output_ep),
994 buf, sizeof(nexio_init_pkt), &actual_len,
995 NEXIO_TIMEOUT);
996 if (ret < 0)
997 goto out_buf;
998
999 /* read replies */
1000 for (i = 0; i < 3; i++) {
1001 memset(buf, 0, NEXIO_BUFSIZE);
1002 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
1003 buf, NEXIO_BUFSIZE, &actual_len,
1004 NEXIO_TIMEOUT);
1005 if (ret < 0 || actual_len < 1 || buf[1] != actual_len)
1006 continue;
1007 switch (buf[0]) {
1008 case 0x83: /* firmware version */
1009 if (!firmware_ver)
1010 firmware_ver = kstrdup(&buf[2], GFP_NOIO);
1011 break;
1012 case 0x84: /* device name */
1013 if (!device_name)
1014 device_name = kstrdup(&buf[2], GFP_NOIO);
1015 break;
1016 }
1017 }
1018
1019 printk(KERN_INFO "Nexio device: %s, firmware version: %s\n",
1020 device_name, firmware_ver);
1021
1022 kfree(firmware_ver);
1023 kfree(device_name);
1024
1025 usb_fill_bulk_urb(priv->ack, dev, usb_sndbulkpipe(dev, output_ep),
1026 priv->ack_buf, sizeof(nexio_ack_pkt),
1027 nexio_ack_complete, usbtouch);
1028 ret = 0;
1029
1030 out_buf:
1031 kfree(buf);
1032 return ret;
1033 }
1034
nexio_exit(struct usbtouch_usb * usbtouch)1035 static void nexio_exit(struct usbtouch_usb *usbtouch)
1036 {
1037 struct nexio_priv *priv = usbtouch->priv;
1038
1039 usb_kill_urb(priv->ack);
1040 usb_free_urb(priv->ack);
1041 kfree(priv->ack_buf);
1042 kfree(priv);
1043 }
1044
nexio_read_data(struct usbtouch_usb * usbtouch,unsigned char * pkt)1045 static int nexio_read_data(struct usbtouch_usb *usbtouch, unsigned char *pkt)
1046 {
1047 struct device *dev = &usbtouch->interface->dev;
1048 struct nexio_touch_packet *packet = (void *) pkt;
1049 struct nexio_priv *priv = usbtouch->priv;
1050 unsigned int data_len = be16_to_cpu(packet->data_len);
1051 unsigned int x_len = be16_to_cpu(packet->x_len);
1052 unsigned int y_len = be16_to_cpu(packet->y_len);
1053 int x, y, begin_x, begin_y, end_x, end_y, w, h, ret;
1054
1055 /* got touch data? */
1056 if ((pkt[0] & 0xe0) != 0xe0)
1057 return 0;
1058
1059 if (data_len > 0xff)
1060 data_len -= 0x100;
1061 if (x_len > 0xff)
1062 x_len -= 0x80;
1063
1064 /* send ACK */
1065 ret = usb_submit_urb(priv->ack, GFP_ATOMIC);
1066 if (ret)
1067 dev_warn(dev, "Failed to submit ACK URB: %d\n", ret);
1068
1069 if (!usbtouch->type->max_xc) {
1070 usbtouch->type->max_xc = 2 * x_len;
1071 input_set_abs_params(usbtouch->input, ABS_X,
1072 0, usbtouch->type->max_xc, 0, 0);
1073 usbtouch->type->max_yc = 2 * y_len;
1074 input_set_abs_params(usbtouch->input, ABS_Y,
1075 0, usbtouch->type->max_yc, 0, 0);
1076 }
1077 /*
1078 * The device reports state of IR sensors on X and Y axes.
1079 * Each byte represents "darkness" percentage (0-100) of one element.
1080 * 17" touchscreen reports only 64 x 52 bytes so the resolution is low.
1081 * This also means that there's a limited multi-touch capability but
1082 * it's disabled (and untested) here as there's no X driver for that.
1083 */
1084 begin_x = end_x = begin_y = end_y = -1;
1085 for (x = 0; x < x_len; x++) {
1086 if (begin_x == -1 && packet->data[x] > NEXIO_THRESHOLD) {
1087 begin_x = x;
1088 continue;
1089 }
1090 if (end_x == -1 && begin_x != -1 && packet->data[x] < NEXIO_THRESHOLD) {
1091 end_x = x - 1;
1092 for (y = x_len; y < data_len; y++) {
1093 if (begin_y == -1 && packet->data[y] > NEXIO_THRESHOLD) {
1094 begin_y = y - x_len;
1095 continue;
1096 }
1097 if (end_y == -1 &&
1098 begin_y != -1 && packet->data[y] < NEXIO_THRESHOLD) {
1099 end_y = y - 1 - x_len;
1100 w = end_x - begin_x;
1101 h = end_y - begin_y;
1102 #if 0
1103 /* multi-touch */
1104 input_report_abs(usbtouch->input,
1105 ABS_MT_TOUCH_MAJOR, max(w,h));
1106 input_report_abs(usbtouch->input,
1107 ABS_MT_TOUCH_MINOR, min(x,h));
1108 input_report_abs(usbtouch->input,
1109 ABS_MT_POSITION_X, 2*begin_x+w);
1110 input_report_abs(usbtouch->input,
1111 ABS_MT_POSITION_Y, 2*begin_y+h);
1112 input_report_abs(usbtouch->input,
1113 ABS_MT_ORIENTATION, w > h);
1114 input_mt_sync(usbtouch->input);
1115 #endif
1116 /* single touch */
1117 usbtouch->x = 2 * begin_x + w;
1118 usbtouch->y = 2 * begin_y + h;
1119 usbtouch->touch = packet->flags & 0x01;
1120 begin_y = end_y = -1;
1121 return 1;
1122 }
1123 }
1124 begin_x = end_x = -1;
1125 }
1126
1127 }
1128 return 0;
1129 }
1130 #endif
1131
1132
1133 /*****************************************************************************
1134 * ELO part
1135 */
1136
1137 #ifdef CONFIG_TOUCHSCREEN_USB_ELO
1138
elo_read_data(struct usbtouch_usb * dev,unsigned char * pkt)1139 static int elo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
1140 {
1141 dev->x = (pkt[3] << 8) | pkt[2];
1142 dev->y = (pkt[5] << 8) | pkt[4];
1143 dev->touch = pkt[6] > 0;
1144 dev->press = pkt[6];
1145
1146 return 1;
1147 }
1148 #endif
1149
1150
1151 /*****************************************************************************
1152 * the different device descriptors
1153 */
1154 #ifdef MULTI_PACKET
1155 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1156 unsigned char *pkt, int len);
1157 #endif
1158
1159 static struct usbtouch_device_info usbtouch_dev_info[] = {
1160 #ifdef CONFIG_TOUCHSCREEN_USB_ELO
1161 [DEVTYPE_ELO] = {
1162 .min_xc = 0x0,
1163 .max_xc = 0x0fff,
1164 .min_yc = 0x0,
1165 .max_yc = 0x0fff,
1166 .max_press = 0xff,
1167 .rept_size = 8,
1168 .read_data = elo_read_data,
1169 },
1170 #endif
1171
1172 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
1173 [DEVTYPE_EGALAX] = {
1174 .min_xc = 0x0,
1175 .max_xc = 0x07ff,
1176 .min_yc = 0x0,
1177 .max_yc = 0x07ff,
1178 .rept_size = 16,
1179 .process_pkt = usbtouch_process_multi,
1180 .get_pkt_len = egalax_get_pkt_len,
1181 .read_data = egalax_read_data,
1182 .init = egalax_init,
1183 },
1184 #endif
1185
1186 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
1187 [DEVTYPE_PANJIT] = {
1188 .min_xc = 0x0,
1189 .max_xc = 0x0fff,
1190 .min_yc = 0x0,
1191 .max_yc = 0x0fff,
1192 .rept_size = 8,
1193 .read_data = panjit_read_data,
1194 },
1195 #endif
1196
1197 #ifdef CONFIG_TOUCHSCREEN_USB_3M
1198 [DEVTYPE_3M] = {
1199 .min_xc = 0x0,
1200 .max_xc = 0x4000,
1201 .min_yc = 0x0,
1202 .max_yc = 0x4000,
1203 .rept_size = 11,
1204 .read_data = mtouch_read_data,
1205 .alloc = mtouch_alloc,
1206 .init = mtouch_init,
1207 .exit = mtouch_exit,
1208 },
1209 #endif
1210
1211 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
1212 [DEVTYPE_ITM] = {
1213 .min_xc = 0x0,
1214 .max_xc = 0x0fff,
1215 .min_yc = 0x0,
1216 .max_yc = 0x0fff,
1217 .max_press = 0xff,
1218 .rept_size = 8,
1219 .read_data = itm_read_data,
1220 },
1221 #endif
1222
1223 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
1224 [DEVTYPE_ETURBO] = {
1225 .min_xc = 0x0,
1226 .max_xc = 0x07ff,
1227 .min_yc = 0x0,
1228 .max_yc = 0x07ff,
1229 .rept_size = 8,
1230 .process_pkt = usbtouch_process_multi,
1231 .get_pkt_len = eturbo_get_pkt_len,
1232 .read_data = eturbo_read_data,
1233 },
1234 #endif
1235
1236 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
1237 [DEVTYPE_GUNZE] = {
1238 .min_xc = 0x0,
1239 .max_xc = 0x0fff,
1240 .min_yc = 0x0,
1241 .max_yc = 0x0fff,
1242 .rept_size = 4,
1243 .read_data = gunze_read_data,
1244 },
1245 #endif
1246
1247 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
1248 [DEVTYPE_DMC_TSC10] = {
1249 .min_xc = 0x0,
1250 .max_xc = 0x03ff,
1251 .min_yc = 0x0,
1252 .max_yc = 0x03ff,
1253 .rept_size = 5,
1254 .init = dmc_tsc10_init,
1255 .read_data = dmc_tsc10_read_data,
1256 },
1257 #endif
1258
1259 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
1260 [DEVTYPE_IRTOUCH] = {
1261 .min_xc = 0x0,
1262 .max_xc = 0x0fff,
1263 .min_yc = 0x0,
1264 .max_yc = 0x0fff,
1265 .rept_size = 8,
1266 .read_data = irtouch_read_data,
1267 },
1268
1269 [DEVTYPE_IRTOUCH_HIRES] = {
1270 .min_xc = 0x0,
1271 .max_xc = 0x7fff,
1272 .min_yc = 0x0,
1273 .max_yc = 0x7fff,
1274 .rept_size = 8,
1275 .read_data = irtouch_read_data,
1276 },
1277 #endif
1278
1279 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
1280 [DEVTYPE_IDEALTEK] = {
1281 .min_xc = 0x0,
1282 .max_xc = 0x0fff,
1283 .min_yc = 0x0,
1284 .max_yc = 0x0fff,
1285 .rept_size = 8,
1286 .process_pkt = usbtouch_process_multi,
1287 .get_pkt_len = idealtek_get_pkt_len,
1288 .read_data = idealtek_read_data,
1289 },
1290 #endif
1291
1292 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
1293 [DEVTYPE_GENERAL_TOUCH] = {
1294 .min_xc = 0x0,
1295 .max_xc = 0x7fff,
1296 .min_yc = 0x0,
1297 .max_yc = 0x7fff,
1298 .rept_size = 7,
1299 .read_data = general_touch_read_data,
1300 },
1301 #endif
1302
1303 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
1304 [DEVTYPE_GOTOP] = {
1305 .min_xc = 0x0,
1306 .max_xc = 0x03ff,
1307 .min_yc = 0x0,
1308 .max_yc = 0x03ff,
1309 .rept_size = 4,
1310 .read_data = gotop_read_data,
1311 },
1312 #endif
1313
1314 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
1315 [DEVTYPE_JASTEC] = {
1316 .min_xc = 0x0,
1317 .max_xc = 0x0fff,
1318 .min_yc = 0x0,
1319 .max_yc = 0x0fff,
1320 .rept_size = 4,
1321 .read_data = jastec_read_data,
1322 },
1323 #endif
1324
1325 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
1326 [DEVTYPE_E2I] = {
1327 .min_xc = 0x0,
1328 .max_xc = 0x7fff,
1329 .min_yc = 0x0,
1330 .max_yc = 0x7fff,
1331 .rept_size = 6,
1332 .init = e2i_init,
1333 .read_data = e2i_read_data,
1334 },
1335 #endif
1336
1337 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
1338 [DEVTYPE_ZYTRONIC] = {
1339 .min_xc = 0x0,
1340 .max_xc = 0x03ff,
1341 .min_yc = 0x0,
1342 .max_yc = 0x03ff,
1343 .rept_size = 5,
1344 .read_data = zytronic_read_data,
1345 .irq_always = true,
1346 },
1347 #endif
1348
1349 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
1350 [DEVTYPE_TC45USB] = {
1351 .min_xc = 0x0,
1352 .max_xc = 0x0fff,
1353 .min_yc = 0x0,
1354 .max_yc = 0x0fff,
1355 .rept_size = 5,
1356 .read_data = tc45usb_read_data,
1357 },
1358 #endif
1359
1360 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
1361 [DEVTYPE_NEXIO] = {
1362 .rept_size = 1024,
1363 .irq_always = true,
1364 .read_data = nexio_read_data,
1365 .alloc = nexio_alloc,
1366 .init = nexio_init,
1367 .exit = nexio_exit,
1368 },
1369 #endif
1370 #ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
1371 [DEVTYPE_ETOUCH] = {
1372 .min_xc = 0x0,
1373 .max_xc = 0x07ff,
1374 .min_yc = 0x0,
1375 .max_yc = 0x07ff,
1376 .rept_size = 16,
1377 .process_pkt = usbtouch_process_multi,
1378 .get_pkt_len = etouch_get_pkt_len,
1379 .read_data = etouch_read_data,
1380 },
1381 #endif
1382 };
1383
1384
1385 /*****************************************************************************
1386 * Generic Part
1387 */
usbtouch_process_pkt(struct usbtouch_usb * usbtouch,unsigned char * pkt,int len)1388 static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
1389 unsigned char *pkt, int len)
1390 {
1391 struct usbtouch_device_info *type = usbtouch->type;
1392
1393 if (!type->read_data(usbtouch, pkt))
1394 return;
1395
1396 input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch);
1397
1398 if (swap_xy) {
1399 input_report_abs(usbtouch->input, ABS_X, usbtouch->y);
1400 input_report_abs(usbtouch->input, ABS_Y, usbtouch->x);
1401 } else {
1402 input_report_abs(usbtouch->input, ABS_X, usbtouch->x);
1403 input_report_abs(usbtouch->input, ABS_Y, usbtouch->y);
1404 }
1405 if (type->max_press)
1406 input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press);
1407 input_sync(usbtouch->input);
1408 }
1409
1410
1411 #ifdef MULTI_PACKET
usbtouch_process_multi(struct usbtouch_usb * usbtouch,unsigned char * pkt,int len)1412 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1413 unsigned char *pkt, int len)
1414 {
1415 unsigned char *buffer;
1416 int pkt_len, pos, buf_len, tmp;
1417
1418 /* process buffer */
1419 if (unlikely(usbtouch->buf_len)) {
1420 /* try to get size */
1421 pkt_len = usbtouch->type->get_pkt_len(
1422 usbtouch->buffer, usbtouch->buf_len);
1423
1424 /* drop? */
1425 if (unlikely(!pkt_len))
1426 goto out_flush_buf;
1427
1428 /* need to append -pkt_len bytes before able to get size */
1429 if (unlikely(pkt_len < 0)) {
1430 int append = -pkt_len;
1431 if (unlikely(append > len))
1432 append = len;
1433 if (usbtouch->buf_len + append >= usbtouch->type->rept_size)
1434 goto out_flush_buf;
1435 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append);
1436 usbtouch->buf_len += append;
1437
1438 pkt_len = usbtouch->type->get_pkt_len(
1439 usbtouch->buffer, usbtouch->buf_len);
1440 if (pkt_len < 0)
1441 return;
1442 }
1443
1444 /* append */
1445 tmp = pkt_len - usbtouch->buf_len;
1446 if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size)
1447 goto out_flush_buf;
1448 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp);
1449 usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len);
1450
1451 buffer = pkt + tmp;
1452 buf_len = len - tmp;
1453 } else {
1454 buffer = pkt;
1455 buf_len = len;
1456 }
1457
1458 /* loop over the received packet, process */
1459 pos = 0;
1460 while (pos < buf_len) {
1461 /* get packet len */
1462 pkt_len = usbtouch->type->get_pkt_len(buffer + pos,
1463 buf_len - pos);
1464
1465 /* unknown packet: skip one byte */
1466 if (unlikely(!pkt_len)) {
1467 pos++;
1468 continue;
1469 }
1470
1471 /* full packet: process */
1472 if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) {
1473 usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len);
1474 } else {
1475 /* incomplete packet: save in buffer */
1476 memcpy(usbtouch->buffer, buffer + pos, buf_len - pos);
1477 usbtouch->buf_len = buf_len - pos;
1478 return;
1479 }
1480 pos += pkt_len;
1481 }
1482
1483 out_flush_buf:
1484 usbtouch->buf_len = 0;
1485 return;
1486 }
1487 #endif
1488
1489
usbtouch_irq(struct urb * urb)1490 static void usbtouch_irq(struct urb *urb)
1491 {
1492 struct usbtouch_usb *usbtouch = urb->context;
1493 struct device *dev = &usbtouch->interface->dev;
1494 int retval;
1495
1496 switch (urb->status) {
1497 case 0:
1498 /* success */
1499 break;
1500 case -ETIME:
1501 /* this urb is timing out */
1502 dev_dbg(dev,
1503 "%s - urb timed out - was the device unplugged?\n",
1504 __func__);
1505 return;
1506 case -ECONNRESET:
1507 case -ENOENT:
1508 case -ESHUTDOWN:
1509 case -EPIPE:
1510 /* this urb is terminated, clean up */
1511 dev_dbg(dev, "%s - urb shutting down with status: %d\n",
1512 __func__, urb->status);
1513 return;
1514 default:
1515 dev_dbg(dev, "%s - nonzero urb status received: %d\n",
1516 __func__, urb->status);
1517 goto exit;
1518 }
1519
1520 usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length);
1521
1522 exit:
1523 usb_mark_last_busy(interface_to_usbdev(usbtouch->interface));
1524 retval = usb_submit_urb(urb, GFP_ATOMIC);
1525 if (retval)
1526 dev_err(dev, "%s - usb_submit_urb failed with result: %d\n",
1527 __func__, retval);
1528 }
1529
usbtouch_open(struct input_dev * input)1530 static int usbtouch_open(struct input_dev *input)
1531 {
1532 struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1533 int r;
1534
1535 usbtouch->irq->dev = interface_to_usbdev(usbtouch->interface);
1536
1537 r = usb_autopm_get_interface(usbtouch->interface) ? -EIO : 0;
1538 if (r < 0)
1539 goto out;
1540
1541 mutex_lock(&usbtouch->pm_mutex);
1542 if (!usbtouch->type->irq_always) {
1543 if (usb_submit_urb(usbtouch->irq, GFP_KERNEL)) {
1544 r = -EIO;
1545 goto out_put;
1546 }
1547 }
1548
1549 usbtouch->interface->needs_remote_wakeup = 1;
1550 usbtouch->is_open = true;
1551 out_put:
1552 mutex_unlock(&usbtouch->pm_mutex);
1553 usb_autopm_put_interface(usbtouch->interface);
1554 out:
1555 return r;
1556 }
1557
usbtouch_close(struct input_dev * input)1558 static void usbtouch_close(struct input_dev *input)
1559 {
1560 struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1561 int r;
1562
1563 mutex_lock(&usbtouch->pm_mutex);
1564 if (!usbtouch->type->irq_always)
1565 usb_kill_urb(usbtouch->irq);
1566 usbtouch->is_open = false;
1567 mutex_unlock(&usbtouch->pm_mutex);
1568
1569 r = usb_autopm_get_interface(usbtouch->interface);
1570 usbtouch->interface->needs_remote_wakeup = 0;
1571 if (!r)
1572 usb_autopm_put_interface(usbtouch->interface);
1573 }
1574
usbtouch_suspend(struct usb_interface * intf,pm_message_t message)1575 static int usbtouch_suspend
1576 (struct usb_interface *intf, pm_message_t message)
1577 {
1578 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1579
1580 usb_kill_urb(usbtouch->irq);
1581
1582 return 0;
1583 }
1584
usbtouch_resume(struct usb_interface * intf)1585 static int usbtouch_resume(struct usb_interface *intf)
1586 {
1587 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1588 int result = 0;
1589
1590 mutex_lock(&usbtouch->pm_mutex);
1591 if (usbtouch->is_open || usbtouch->type->irq_always)
1592 result = usb_submit_urb(usbtouch->irq, GFP_NOIO);
1593 mutex_unlock(&usbtouch->pm_mutex);
1594
1595 return result;
1596 }
1597
usbtouch_reset_resume(struct usb_interface * intf)1598 static int usbtouch_reset_resume(struct usb_interface *intf)
1599 {
1600 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1601 int err = 0;
1602
1603 /* reinit the device */
1604 if (usbtouch->type->init) {
1605 err = usbtouch->type->init(usbtouch);
1606 if (err) {
1607 dev_dbg(&intf->dev,
1608 "%s - type->init() failed, err: %d\n",
1609 __func__, err);
1610 return err;
1611 }
1612 }
1613
1614 /* restart IO if needed */
1615 mutex_lock(&usbtouch->pm_mutex);
1616 if (usbtouch->is_open)
1617 err = usb_submit_urb(usbtouch->irq, GFP_NOIO);
1618 mutex_unlock(&usbtouch->pm_mutex);
1619
1620 return err;
1621 }
1622
usbtouch_free_buffers(struct usb_device * udev,struct usbtouch_usb * usbtouch)1623 static void usbtouch_free_buffers(struct usb_device *udev,
1624 struct usbtouch_usb *usbtouch)
1625 {
1626 usb_free_coherent(udev, usbtouch->data_size,
1627 usbtouch->data, usbtouch->data_dma);
1628 kfree(usbtouch->buffer);
1629 }
1630
1631 static struct usb_endpoint_descriptor *
usbtouch_get_input_endpoint(struct usb_host_interface * interface)1632 usbtouch_get_input_endpoint(struct usb_host_interface *interface)
1633 {
1634 int i;
1635
1636 for (i = 0; i < interface->desc.bNumEndpoints; i++)
1637 if (usb_endpoint_dir_in(&interface->endpoint[i].desc))
1638 return &interface->endpoint[i].desc;
1639
1640 return NULL;
1641 }
1642
usbtouch_probe(struct usb_interface * intf,const struct usb_device_id * id)1643 static int usbtouch_probe(struct usb_interface *intf,
1644 const struct usb_device_id *id)
1645 {
1646 struct usbtouch_usb *usbtouch;
1647 struct input_dev *input_dev;
1648 struct usb_endpoint_descriptor *endpoint;
1649 struct usb_device *udev = interface_to_usbdev(intf);
1650 struct usbtouch_device_info *type;
1651 int err = -ENOMEM;
1652
1653 /* some devices are ignored */
1654 if (id->driver_info == DEVTYPE_IGNORE)
1655 return -ENODEV;
1656
1657 if (id->driver_info >= ARRAY_SIZE(usbtouch_dev_info))
1658 return -ENODEV;
1659
1660 endpoint = usbtouch_get_input_endpoint(intf->cur_altsetting);
1661 if (!endpoint)
1662 return -ENXIO;
1663
1664 usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL);
1665 input_dev = input_allocate_device();
1666 if (!usbtouch || !input_dev)
1667 goto out_free;
1668
1669 mutex_init(&usbtouch->pm_mutex);
1670
1671 type = &usbtouch_dev_info[id->driver_info];
1672 usbtouch->type = type;
1673 if (!type->process_pkt)
1674 type->process_pkt = usbtouch_process_pkt;
1675
1676 usbtouch->data_size = type->rept_size;
1677 if (type->get_pkt_len) {
1678 /*
1679 * When dealing with variable-length packets we should
1680 * not request more than wMaxPacketSize bytes at once
1681 * as we do not know if there is more data coming or
1682 * we filled exactly wMaxPacketSize bytes and there is
1683 * nothing else.
1684 */
1685 usbtouch->data_size = min(usbtouch->data_size,
1686 usb_endpoint_maxp(endpoint));
1687 }
1688
1689 usbtouch->data = usb_alloc_coherent(udev, usbtouch->data_size,
1690 GFP_KERNEL, &usbtouch->data_dma);
1691 if (!usbtouch->data)
1692 goto out_free;
1693
1694 if (type->get_pkt_len) {
1695 usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL);
1696 if (!usbtouch->buffer)
1697 goto out_free_buffers;
1698 }
1699
1700 usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
1701 if (!usbtouch->irq) {
1702 dev_dbg(&intf->dev,
1703 "%s - usb_alloc_urb failed: usbtouch->irq\n", __func__);
1704 goto out_free_buffers;
1705 }
1706
1707 usbtouch->interface = intf;
1708 usbtouch->input = input_dev;
1709
1710 if (udev->manufacturer)
1711 strscpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name));
1712
1713 if (udev->product) {
1714 if (udev->manufacturer)
1715 strlcat(usbtouch->name, " ", sizeof(usbtouch->name));
1716 strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name));
1717 }
1718
1719 if (!strlen(usbtouch->name))
1720 snprintf(usbtouch->name, sizeof(usbtouch->name),
1721 "USB Touchscreen %04x:%04x",
1722 le16_to_cpu(udev->descriptor.idVendor),
1723 le16_to_cpu(udev->descriptor.idProduct));
1724
1725 usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys));
1726 strlcat(usbtouch->phys, "/input0", sizeof(usbtouch->phys));
1727
1728 input_dev->name = usbtouch->name;
1729 input_dev->phys = usbtouch->phys;
1730 usb_to_input_id(udev, &input_dev->id);
1731 input_dev->dev.parent = &intf->dev;
1732
1733 input_set_drvdata(input_dev, usbtouch);
1734
1735 input_dev->open = usbtouch_open;
1736 input_dev->close = usbtouch_close;
1737
1738 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
1739 input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
1740 input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0);
1741 input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0);
1742 if (type->max_press)
1743 input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press,
1744 type->max_press, 0, 0);
1745
1746 if (usb_endpoint_type(endpoint) == USB_ENDPOINT_XFER_INT)
1747 usb_fill_int_urb(usbtouch->irq, udev,
1748 usb_rcvintpipe(udev, endpoint->bEndpointAddress),
1749 usbtouch->data, usbtouch->data_size,
1750 usbtouch_irq, usbtouch, endpoint->bInterval);
1751 else
1752 usb_fill_bulk_urb(usbtouch->irq, udev,
1753 usb_rcvbulkpipe(udev, endpoint->bEndpointAddress),
1754 usbtouch->data, usbtouch->data_size,
1755 usbtouch_irq, usbtouch);
1756
1757 usbtouch->irq->dev = udev;
1758 usbtouch->irq->transfer_dma = usbtouch->data_dma;
1759 usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1760
1761 /* device specific allocations */
1762 if (type->alloc) {
1763 err = type->alloc(usbtouch);
1764 if (err) {
1765 dev_dbg(&intf->dev,
1766 "%s - type->alloc() failed, err: %d\n",
1767 __func__, err);
1768 goto out_free_urb;
1769 }
1770 }
1771
1772 /* device specific initialisation*/
1773 if (type->init) {
1774 err = type->init(usbtouch);
1775 if (err) {
1776 dev_dbg(&intf->dev,
1777 "%s - type->init() failed, err: %d\n",
1778 __func__, err);
1779 goto out_do_exit;
1780 }
1781 }
1782
1783 err = input_register_device(usbtouch->input);
1784 if (err) {
1785 dev_dbg(&intf->dev,
1786 "%s - input_register_device failed, err: %d\n",
1787 __func__, err);
1788 goto out_do_exit;
1789 }
1790
1791 usb_set_intfdata(intf, usbtouch);
1792
1793 if (usbtouch->type->irq_always) {
1794 /* this can't fail */
1795 usb_autopm_get_interface(intf);
1796 err = usb_submit_urb(usbtouch->irq, GFP_KERNEL);
1797 if (err) {
1798 usb_autopm_put_interface(intf);
1799 dev_err(&intf->dev,
1800 "%s - usb_submit_urb failed with result: %d\n",
1801 __func__, err);
1802 goto out_unregister_input;
1803 }
1804 }
1805
1806 return 0;
1807
1808 out_unregister_input:
1809 input_unregister_device(input_dev);
1810 input_dev = NULL;
1811 out_do_exit:
1812 if (type->exit)
1813 type->exit(usbtouch);
1814 out_free_urb:
1815 usb_free_urb(usbtouch->irq);
1816 out_free_buffers:
1817 usbtouch_free_buffers(udev, usbtouch);
1818 out_free:
1819 input_free_device(input_dev);
1820 kfree(usbtouch);
1821 return err;
1822 }
1823
usbtouch_disconnect(struct usb_interface * intf)1824 static void usbtouch_disconnect(struct usb_interface *intf)
1825 {
1826 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1827
1828 if (!usbtouch)
1829 return;
1830
1831 dev_dbg(&intf->dev,
1832 "%s - usbtouch is initialized, cleaning up\n", __func__);
1833
1834 usb_set_intfdata(intf, NULL);
1835 /* this will stop IO via close */
1836 input_unregister_device(usbtouch->input);
1837 usb_free_urb(usbtouch->irq);
1838 if (usbtouch->type->exit)
1839 usbtouch->type->exit(usbtouch);
1840 usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch);
1841 kfree(usbtouch);
1842 }
1843
1844 MODULE_DEVICE_TABLE(usb, usbtouch_devices);
1845
1846 static struct usb_driver usbtouch_driver = {
1847 .name = "usbtouchscreen",
1848 .probe = usbtouch_probe,
1849 .disconnect = usbtouch_disconnect,
1850 .suspend = usbtouch_suspend,
1851 .resume = usbtouch_resume,
1852 .reset_resume = usbtouch_reset_resume,
1853 .id_table = usbtouch_devices,
1854 .supports_autosuspend = 1,
1855 };
1856
1857 module_usb_driver(usbtouch_driver);
1858
1859 MODULE_AUTHOR("Daniel Ritz <daniel.ritz@gmx.ch>");
1860 MODULE_DESCRIPTION("USB Touchscreen Driver");
1861 MODULE_LICENSE("GPL");
1862
1863 MODULE_ALIAS("touchkitusb");
1864 MODULE_ALIAS("itmtouch");
1865 MODULE_ALIAS("mtouchusb");
1866