?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / input / touchscreen / usbtouchscreen.c
blob16d70201de4a3334fc4dd49dc3d205ce4d96bc52
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(0x595a, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
186 {USB_DEVICE(0x6615, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
187 {USB_DEVICE(0x6615, 0x0012), .driver_info = DEVTYPE_IRTOUCH_HIRES},
188 #endif
189
190 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
191 {USB_DEVICE(0x1391, 0x1000), .driver_info = DEVTYPE_IDEALTEK},
192 #endif
193
194 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
195 {USB_DEVICE(0x0dfc, 0x0001), .driver_info = DEVTYPE_GENERAL_TOUCH},
196 #endif
197
198 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
199 {USB_DEVICE(0x08f2, 0x007f), .driver_info = DEVTYPE_GOTOP},
200 {USB_DEVICE(0x08f2, 0x00ce), .driver_info = DEVTYPE_GOTOP},
201 {USB_DEVICE(0x08f2, 0x00f4), .driver_info = DEVTYPE_GOTOP},
202 #endif
203
204 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
205 {USB_DEVICE(0x0f92, 0x0001), .driver_info = DEVTYPE_JASTEC},
206 #endif
207
208 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
209 {USB_DEVICE(0x1ac7, 0x0001), .driver_info = DEVTYPE_E2I},
210 #endif
211
212 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
213 {USB_DEVICE(0x14c8, 0x0003), .driver_info = DEVTYPE_ZYTRONIC},
214 #endif
215
216 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
217 /* TC5UH */
218 {USB_DEVICE(0x0664, 0x0309), .driver_info = DEVTYPE_TC45USB},
219 /* TC4UM */
220 {USB_DEVICE(0x0664, 0x0306), .driver_info = DEVTYPE_TC45USB},
221 #endif
222
223 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
224 /* data interface only */
225 {USB_DEVICE_AND_INTERFACE_INFO(0x10f0, 0x2002, 0x0a, 0x00, 0x00),
226 .driver_info = DEVTYPE_NEXIO},
227 {USB_DEVICE_AND_INTERFACE_INFO(0x1870, 0x0001, 0x0a, 0x00, 0x00),
228 .driver_info = DEVTYPE_NEXIO},
229 #endif
230
231 #ifdef CONFIG_TOUCHSCREEN_USB_ELO
232 {USB_DEVICE(0x04e7, 0x0020), .driver_info = DEVTYPE_ELO},
233 #endif
234
235 #ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
236 {USB_DEVICE(0x7374, 0x0001), .driver_info = DEVTYPE_ETOUCH},
237 #endif
238
239 {}
240 };
241
242
243 /*****************************************************************************
244 * e2i Part
245 */
246
247 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
248 static int e2i_init(struct usbtouch_usb *usbtouch)
249 {
250 int ret;
251 struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
252
253 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
254 0x01, 0x02, 0x0000, 0x0081,
255 NULL, 0, USB_CTRL_SET_TIMEOUT);
256
257 dev_dbg(&usbtouch->interface->dev,
258 "%s - usb_control_msg - E2I_RESET - bytes|err: %d\n",
259 __func__, ret);
260 return ret;
261 }
262
263 static int e2i_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
264 {
265 int tmp = (pkt[0] << 8) | pkt[1];
266 dev->x = (pkt[2] << 8) | pkt[3];
267 dev->y = (pkt[4] << 8) | pkt[5];
268
269 tmp = tmp - 0xA000;
270 dev->touch = (tmp > 0);
271 dev->press = (tmp > 0 ? tmp : 0);
272
273 return 1;
274 }
275 #endif
276
277
278 /*****************************************************************************
279 * eGalax part
280 */
281
282 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
283
284 #ifndef MULTI_PACKET
285 #define MULTI_PACKET
286 #endif
287
288 #define EGALAX_PKT_TYPE_MASK 0xFE
289 #define EGALAX_PKT_TYPE_REPT 0x80
290 #define EGALAX_PKT_TYPE_DIAG 0x0A
291
292 static int egalax_init(struct usbtouch_usb *usbtouch)
293 {
294 int ret, i;
295 unsigned char *buf;
296 struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
297
298 /*
299 * An eGalax diagnostic packet kicks the device into using the right
300 * protocol. We send a "check active" packet. The response will be
301 * read later and ignored.
302 */
303
304 buf = kmalloc(3, GFP_KERNEL);
305 if (!buf)
306 return -ENOMEM;
307
308 buf[0] = EGALAX_PKT_TYPE_DIAG;
309 buf[1] = 1; /* length */
310 buf[2] = 'A'; /* command - check active */
311
312 for (i = 0; i < 3; i++) {
313 ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
314 0,
315 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
316 0, 0, buf, 3,
317 USB_CTRL_SET_TIMEOUT);
318 if (ret >= 0) {
319 ret = 0;
320 break;
321 }
322 if (ret != -EPIPE)
323 break;
324 }
325
326 kfree(buf);
327
328 return ret;
329 }
330
331 static int egalax_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
332 {
333 if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT)
334 return 0;
335
336 dev->x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F);
337 dev->y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F);
338 dev->touch = pkt[0] & 0x01;
339
340 return 1;
341 }
342
343 static int egalax_get_pkt_len(unsigned char *buf, int len)
344 {
345 switch (buf[0] & EGALAX_PKT_TYPE_MASK) {
346 case EGALAX_PKT_TYPE_REPT:
347 return 5;
348
349 case EGALAX_PKT_TYPE_DIAG:
350 if (len < 2)
351 return -1;
352
353 return buf[1] + 2;
354 }
355
356 return 0;
357 }
358 #endif
359
360 /*****************************************************************************
361 * EasyTouch part
362 */
363
364 #ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
365
366 #ifndef MULTI_PACKET
367 #define MULTI_PACKET
368 #endif
369
370 #define ETOUCH_PKT_TYPE_MASK 0xFE
371 #define ETOUCH_PKT_TYPE_REPT 0x80
372 #define ETOUCH_PKT_TYPE_REPT2 0xB0
373 #define ETOUCH_PKT_TYPE_DIAG 0x0A
374
375 static int etouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
376 {
377 if ((pkt[0] & ETOUCH_PKT_TYPE_MASK) != ETOUCH_PKT_TYPE_REPT &&
378 (pkt[0] & ETOUCH_PKT_TYPE_MASK) != ETOUCH_PKT_TYPE_REPT2)
379 return 0;
380
381 dev->x = ((pkt[1] & 0x1F) << 7) | (pkt[2] & 0x7F);
382 dev->y = ((pkt[3] & 0x1F) << 7) | (pkt[4] & 0x7F);
383 dev->touch = pkt[0] & 0x01;
384
385 return 1;
386 }
387
388 static int etouch_get_pkt_len(unsigned char *buf, int len)
389 {
390 switch (buf[0] & ETOUCH_PKT_TYPE_MASK) {
391 case ETOUCH_PKT_TYPE_REPT:
392 case ETOUCH_PKT_TYPE_REPT2:
393 return 5;
394
395 case ETOUCH_PKT_TYPE_DIAG:
396 if (len < 2)
397 return -1;
398
399 return buf[1] + 2;
400 }
401
402 return 0;
403 }
404 #endif
405
406 /*****************************************************************************
407 * PanJit Part
408 */
409 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
410 static int panjit_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
411 {
412 dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
413 dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
414 dev->touch = pkt[0] & 0x01;
415
416 return 1;
417 }
418 #endif
419
420
421 /*****************************************************************************
422 * 3M/Microtouch Part
423 */
424 #ifdef CONFIG_TOUCHSCREEN_USB_3M
425
426 #define MTOUCHUSB_ASYNC_REPORT 1
427 #define MTOUCHUSB_RESET 7
428 #define MTOUCHUSB_REQ_CTRLLR_ID 10
429
430 #define MTOUCHUSB_REQ_CTRLLR_ID_LEN 16
431
432 static int mtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
433 {
434 if (hwcalib_xy) {
435 dev->x = (pkt[4] << 8) | pkt[3];
436 dev->y = 0xffff - ((pkt[6] << 8) | pkt[5]);
437 } else {
438 dev->x = (pkt[8] << 8) | pkt[7];
439 dev->y = (pkt[10] << 8) | pkt[9];
440 }
441 dev->touch = (pkt[2] & 0x40) ? 1 : 0;
442
443 return 1;
444 }
445
446 struct mtouch_priv {
447 u8 fw_rev_major;
448 u8 fw_rev_minor;
449 };
450
451 static ssize_t mtouch_firmware_rev_show(struct device *dev,
452 struct device_attribute *attr, char *output)
453 {
454 struct usb_interface *intf = to_usb_interface(dev);
455 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
456 struct mtouch_priv *priv = usbtouch->priv;
457
458 return scnprintf(output, PAGE_SIZE, "%1x.%1x\n",
459 priv->fw_rev_major, priv->fw_rev_minor);
460 }
461 static DEVICE_ATTR(firmware_rev, 0444, mtouch_firmware_rev_show, NULL);
462
463 static struct attribute *mtouch_attrs[] = {
464 &dev_attr_firmware_rev.attr,
465 NULL
466 };
467
468 static const struct attribute_group mtouch_attr_group = {
469 .attrs = mtouch_attrs,
470 };
471
472 static int mtouch_get_fw_revision(struct usbtouch_usb *usbtouch)
473 {
474 struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
475 struct mtouch_priv *priv = usbtouch->priv;
476 u8 *buf;
477 int ret;
478
479 buf = kzalloc(MTOUCHUSB_REQ_CTRLLR_ID_LEN, GFP_NOIO);
480 if (!buf)
481 return -ENOMEM;
482
483 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
484 MTOUCHUSB_REQ_CTRLLR_ID,
485 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
486 0, 0, buf, MTOUCHUSB_REQ_CTRLLR_ID_LEN,
487 USB_CTRL_SET_TIMEOUT);
488 if (ret != MTOUCHUSB_REQ_CTRLLR_ID_LEN) {
489 dev_warn(&usbtouch->interface->dev,
490 "Failed to read FW rev: %d\n", ret);
491 ret = ret < 0 ? ret : -EIO;
492 goto free;
493 }
494
495 priv->fw_rev_major = buf[3];
496 priv->fw_rev_minor = buf[4];
497
498 ret = 0;
499
500 free:
501 kfree(buf);
502 return ret;
503 }
504
505 static int mtouch_alloc(struct usbtouch_usb *usbtouch)
506 {
507 int ret;
508
509 usbtouch->priv = kmalloc(sizeof(struct mtouch_priv), GFP_KERNEL);
510 if (!usbtouch->priv)
511 return -ENOMEM;
512
513 ret = sysfs_create_group(&usbtouch->interface->dev.kobj,
514 &mtouch_attr_group);
515 if (ret) {
516 kfree(usbtouch->priv);
517 usbtouch->priv = NULL;
518 return ret;
519 }
520
521 return 0;
522 }
523
524 static int mtouch_init(struct usbtouch_usb *usbtouch)
525 {
526 int ret, i;
527 struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
528
529 ret = mtouch_get_fw_revision(usbtouch);
530 if (ret)
531 return ret;
532
533 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
534 MTOUCHUSB_RESET,
535 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
536 1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
537 dev_dbg(&usbtouch->interface->dev,
538 "%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d\n",
539 __func__, ret);
540 if (ret < 0)
541 return ret;
542 msleep(150);
543
544 for (i = 0; i < 3; i++) {
545 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
546 MTOUCHUSB_ASYNC_REPORT,
547 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
548 1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT);
549 dev_dbg(&usbtouch->interface->dev,
550 "%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d\n",
551 __func__, ret);
552 if (ret >= 0)
553 break;
554 if (ret != -EPIPE)
555 return ret;
556 }
557
558 /* Default min/max xy are the raw values, override if using hw-calib */
559 if (hwcalib_xy) {
560 input_set_abs_params(usbtouch->input, ABS_X, 0, 0xffff, 0, 0);
561 input_set_abs_params(usbtouch->input, ABS_Y, 0, 0xffff, 0, 0);
562 }
563
564 return 0;
565 }
566
567 static void mtouch_exit(struct usbtouch_usb *usbtouch)
568 {
569 struct mtouch_priv *priv = usbtouch->priv;
570
571 sysfs_remove_group(&usbtouch->interface->dev.kobj, &mtouch_attr_group);
572 kfree(priv);
573 }
574 #endif
575
576
577 /*****************************************************************************
578 * ITM Part
579 */
580 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
581 static int itm_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
582 {
583 int touch;
584 /*
585 * ITM devices report invalid x/y data if not touched.
586 * if the screen was touched before but is not touched any more
587 * report touch as 0 with the last valid x/y data once. then stop
588 * reporting data until touched again.
589 */
590 dev->press = ((pkt[2] & 0x01) << 7) | (pkt[5] & 0x7F);
591
592 touch = ~pkt[7] & 0x20;
593 if (!touch) {
594 if (dev->touch) {
595 dev->touch = 0;
596 return 1;
597 }
598
599 return 0;
600 }
601
602 dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F);
603 dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F);
604 dev->touch = touch;
605
606 return 1;
607 }
608 #endif
609
610
611 /*****************************************************************************
612 * eTurboTouch part
613 */
614 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
615 #ifndef MULTI_PACKET
616 #define MULTI_PACKET
617 #endif
618 static int eturbo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
619 {
620 unsigned int shift;
621
622 /* packets should start with sync */
623 if (!(pkt[0] & 0x80))
624 return 0;
625
626 shift = (6 - (pkt[0] & 0x03));
627 dev->x = ((pkt[3] << 7) | pkt[4]) >> shift;
628 dev->y = ((pkt[1] << 7) | pkt[2]) >> shift;
629 dev->touch = (pkt[0] & 0x10) ? 1 : 0;
630
631 return 1;
632 }
633
634 static int eturbo_get_pkt_len(unsigned char *buf, int len)
635 {
636 if (buf[0] & 0x80)
637 return 5;
638 if (buf[0] == 0x01)
639 return 3;
640 return 0;
641 }
642 #endif
643
644
645 /*****************************************************************************
646 * Gunze part
647 */
648 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
649 static int gunze_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
650 {
651 if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80))
652 return 0;
653
654 dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F);
655 dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F);
656 dev->touch = pkt[0] & 0x20;
657
658 return 1;
659 }
660 #endif
661
662 /*****************************************************************************
663 * DMC TSC-10/25 Part
664 *
665 * Documentation about the controller and it's protocol can be found at
666 * http://www.dmccoltd.com/files/controler/tsc10usb_pi_e.pdf
667 * http://www.dmccoltd.com/files/controler/tsc25_usb_e.pdf
668 */
669 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
670
671 /* supported data rates. currently using 130 */
672 #define TSC10_RATE_POINT 0x50
673 #define TSC10_RATE_30 0x40
674 #define TSC10_RATE_50 0x41
675 #define TSC10_RATE_80 0x42
676 #define TSC10_RATE_100 0x43
677 #define TSC10_RATE_130 0x44
678 #define TSC10_RATE_150 0x45
679
680 /* commands */
681 #define TSC10_CMD_RESET 0x55
682 #define TSC10_CMD_RATE 0x05
683 #define TSC10_CMD_DATA1 0x01
684
685 static int dmc_tsc10_init(struct usbtouch_usb *usbtouch)
686 {
687 struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
688 int ret = -ENOMEM;
689 unsigned char *buf;
690
691 buf = kmalloc(2, GFP_NOIO);
692 if (!buf)
693 goto err_nobuf;
694 /* reset */
695 buf[0] = buf[1] = 0xFF;
696 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
697 TSC10_CMD_RESET,
698 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
699 0, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
700 if (ret < 0)
701 goto err_out;
702 if (buf[0] != 0x06) {
703 ret = -ENODEV;
704 goto err_out;
705 }
706
707 /* TSC-25 data sheet specifies a delay after the RESET command */
708 msleep(150);
709
710 /* set coordinate output rate */
711 buf[0] = buf[1] = 0xFF;
712 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
713 TSC10_CMD_RATE,
714 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
715 TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
716 if (ret < 0)
717 goto err_out;
718 if ((buf[0] != 0x06) && (buf[0] != 0x15 || buf[1] != 0x01)) {
719 ret = -ENODEV;
720 goto err_out;
721 }
722
723 /* start sending data */
724 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
725 TSC10_CMD_DATA1,
726 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
727 0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
728 err_out:
729 kfree(buf);
730 err_nobuf:
731 return ret;
732 }
733
734
735 static int dmc_tsc10_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
736 {
737 dev->x = ((pkt[2] & 0x03) << 8) | pkt[1];
738 dev->y = ((pkt[4] & 0x03) << 8) | pkt[3];
739 dev->touch = pkt[0] & 0x01;
740
741 return 1;
742 }
743 #endif
744
745
746 /*****************************************************************************
747 * IRTOUCH Part
748 */
749 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
750 static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
751 {
752 dev->x = (pkt[3] << 8) | pkt[2];
753 dev->y = (pkt[5] << 8) | pkt[4];
754 dev->touch = (pkt[1] & 0x03) ? 1 : 0;
755
756 return 1;
757 }
758 #endif
759
760 /*****************************************************************************
761 * ET&T TC5UH/TC4UM part
762 */
763 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
764 static int tc45usb_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
765 {
766 dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
767 dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
768 dev->touch = pkt[0] & 0x01;
769
770 return 1;
771 }
772 #endif
773
774 /*****************************************************************************
775 * IdealTEK URTC1000 Part
776 */
777 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
778 #ifndef MULTI_PACKET
779 #define MULTI_PACKET
780 #endif
781 static int idealtek_get_pkt_len(unsigned char *buf, int len)
782 {
783 if (buf[0] & 0x80)
784 return 5;
785 if (buf[0] == 0x01)
786 return len;
787 return 0;
788 }
789
790 static int idealtek_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
791 {
792 switch (pkt[0] & 0x98) {
793 case 0x88:
794 /* touch data in IdealTEK mode */
795 dev->x = (pkt[1] << 5) | (pkt[2] >> 2);
796 dev->y = (pkt[3] << 5) | (pkt[4] >> 2);
797 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
798 return 1;
799
800 case 0x98:
801 /* touch data in MT emulation mode */
802 dev->x = (pkt[2] << 5) | (pkt[1] >> 2);
803 dev->y = (pkt[4] << 5) | (pkt[3] >> 2);
804 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
805 return 1;
806
807 default:
808 return 0;
809 }
810 }
811 #endif
812
813 /*****************************************************************************
814 * General Touch Part
815 */
816 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
817 static int general_touch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
818 {
819 dev->x = (pkt[2] << 8) | pkt[1];
820 dev->y = (pkt[4] << 8) | pkt[3];
821 dev->press = pkt[5] & 0xff;
822 dev->touch = pkt[0] & 0x01;
823
824 return 1;
825 }
826 #endif
827
828 /*****************************************************************************
829 * GoTop Part
830 */
831 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
832 static int gotop_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
833 {
834 dev->x = ((pkt[1] & 0x38) << 4) | pkt[2];
835 dev->y = ((pkt[1] & 0x07) << 7) | pkt[3];
836 dev->touch = pkt[0] & 0x01;
837
838 return 1;
839 }
840 #endif
841
842 /*****************************************************************************
843 * JASTEC Part
844 */
845 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
846 static int jastec_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
847 {
848 dev->x = ((pkt[0] & 0x3f) << 6) | (pkt[2] & 0x3f);
849 dev->y = ((pkt[1] & 0x3f) << 6) | (pkt[3] & 0x3f);
850 dev->touch = (pkt[0] & 0x40) >> 6;
851
852 return 1;
853 }
854 #endif
855
856 /*****************************************************************************
857 * Zytronic Part
858 */
859 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
860 static int zytronic_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
861 {
862 struct usb_interface *intf = dev->interface;
863
864 switch (pkt[0]) {
865 case 0x3A: /* command response */
866 dev_dbg(&intf->dev, "%s: Command response %d\n", __func__, pkt[1]);
867 break;
868
869 case 0xC0: /* down */
870 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
871 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
872 dev->touch = 1;
873 dev_dbg(&intf->dev, "%s: down %d,%d\n", __func__, dev->x, dev->y);
874 return 1;
875
876 case 0x80: /* up */
877 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
878 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
879 dev->touch = 0;
880 dev_dbg(&intf->dev, "%s: up %d,%d\n", __func__, dev->x, dev->y);
881 return 1;
882
883 default:
884 dev_dbg(&intf->dev, "%s: Unknown return %d\n", __func__, pkt[0]);
885 break;
886 }
887
888 return 0;
889 }
890 #endif
891
892 /*****************************************************************************
893 * NEXIO Part
894 */
895 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
896
897 #define NEXIO_TIMEOUT 5000
898 #define NEXIO_BUFSIZE 1024
899 #define NEXIO_THRESHOLD 50
900
901 struct nexio_priv {
902 struct urb *ack;
903 unsigned char *ack_buf;
904 };
905
906 struct nexio_touch_packet {
907 u8 flags; /* 0xe1 = touch, 0xe1 = release */
908 __be16 data_len; /* total bytes of touch data */
909 __be16 x_len; /* bytes for X axis */
910 __be16 y_len; /* bytes for Y axis */
911 u8 data[];
912 } __attribute__ ((packed));
913
914 static unsigned char nexio_ack_pkt[2] = { 0xaa, 0x02 };
915 static unsigned char nexio_init_pkt[4] = { 0x82, 0x04, 0x0a, 0x0f };
916
917 static void nexio_ack_complete(struct urb *urb)
918 {
919 }
920
921 static int nexio_alloc(struct usbtouch_usb *usbtouch)
922 {
923 struct nexio_priv *priv;
924 int ret = -ENOMEM;
925
926 usbtouch->priv = kmalloc(sizeof(struct nexio_priv), GFP_KERNEL);
927 if (!usbtouch->priv)
928 goto out_buf;
929
930 priv = usbtouch->priv;
931
932 priv->ack_buf = kmemdup(nexio_ack_pkt, sizeof(nexio_ack_pkt),
933 GFP_KERNEL);
934 if (!priv->ack_buf)
935 goto err_priv;
936
937 priv->ack = usb_alloc_urb(0, GFP_KERNEL);
938 if (!priv->ack) {
939 dev_dbg(&usbtouch->interface->dev,
940 "%s - usb_alloc_urb failed: usbtouch->ack\n", __func__);
941 goto err_ack_buf;
942 }
943
944 return 0;
945
946 err_ack_buf:
947 kfree(priv->ack_buf);
948 err_priv:
949 kfree(priv);
950 out_buf:
951 return ret;
952 }
953
954 static int nexio_init(struct usbtouch_usb *usbtouch)
955 {
956 struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
957 struct usb_host_interface *interface = usbtouch->interface->cur_altsetting;
958 struct nexio_priv *priv = usbtouch->priv;
959 int ret = -ENOMEM;
960 int actual_len, i;
961 unsigned char *buf;
962 char *firmware_ver = NULL, *device_name = NULL;
963 int input_ep = 0, output_ep = 0;
964
965 /* find first input and output endpoint */
966 for (i = 0; i < interface->desc.bNumEndpoints; i++) {
967 if (!input_ep &&
968 usb_endpoint_dir_in(&interface->endpoint[i].desc))
969 input_ep = interface->endpoint[i].desc.bEndpointAddress;
970 if (!output_ep &&
971 usb_endpoint_dir_out(&interface->endpoint[i].desc))
972 output_ep = interface->endpoint[i].desc.bEndpointAddress;
973 }
974 if (!input_ep || !output_ep)
975 return -ENXIO;
976
977 buf = kmalloc(NEXIO_BUFSIZE, GFP_NOIO);
978 if (!buf)
979 goto out_buf;
980
981 /* two empty reads */
982 for (i = 0; i < 2; i++) {
983 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
984 buf, NEXIO_BUFSIZE, &actual_len,
985 NEXIO_TIMEOUT);
986 if (ret < 0)
987 goto out_buf;
988 }
989
990 /* send init command */
991 memcpy(buf, nexio_init_pkt, sizeof(nexio_init_pkt));
992 ret = usb_bulk_msg(dev, usb_sndbulkpipe(dev, output_ep),
993 buf, sizeof(nexio_init_pkt), &actual_len,
994 NEXIO_TIMEOUT);
995 if (ret < 0)
996 goto out_buf;
997
998 /* read replies */
999 for (i = 0; i < 3; i++) {
1000 memset(buf, 0, NEXIO_BUFSIZE);
1001 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
1002 buf, NEXIO_BUFSIZE, &actual_len,
1003 NEXIO_TIMEOUT);
1004 if (ret < 0 || actual_len < 1 || buf[1] != actual_len)
1005 continue;
1006 switch (buf[0]) {
1007 case 0x83: /* firmware version */
1008 if (!firmware_ver)
1009 firmware_ver = kstrdup(&buf[2], GFP_NOIO);
1010 break;
1011 case 0x84: /* device name */
1012 if (!device_name)
1013 device_name = kstrdup(&buf[2], GFP_NOIO);
1014 break;
1015 }
1016 }
1017
1018 printk(KERN_INFO "Nexio device: %s, firmware version: %s\n",
1019 device_name, firmware_ver);
1020
1021 kfree(firmware_ver);
1022 kfree(device_name);
1023
1024 usb_fill_bulk_urb(priv->ack, dev, usb_sndbulkpipe(dev, output_ep),
1025 priv->ack_buf, sizeof(nexio_ack_pkt),
1026 nexio_ack_complete, usbtouch);
1027 ret = 0;
1028
1029 out_buf:
1030 kfree(buf);
1031 return ret;
1032 }
1033
1034 static void nexio_exit(struct usbtouch_usb *usbtouch)
1035 {
1036 struct nexio_priv *priv = usbtouch->priv;
1037
1038 usb_kill_urb(priv->ack);
1039 usb_free_urb(priv->ack);
1040 kfree(priv->ack_buf);
1041 kfree(priv);
1042 }
1043
1044 static int nexio_read_data(struct usbtouch_usb *usbtouch, unsigned char *pkt)
1045 {
1046 struct nexio_touch_packet *packet = (void *) pkt;
1047 struct nexio_priv *priv = usbtouch->priv;
1048 unsigned int data_len = be16_to_cpu(packet->data_len);
1049 unsigned int x_len = be16_to_cpu(packet->x_len);
1050 unsigned int y_len = be16_to_cpu(packet->y_len);
1051 int x, y, begin_x, begin_y, end_x, end_y, w, h, ret;
1052
1053 /* got touch data? */
1054 if ((pkt[0] & 0xe0) != 0xe0)
1055 return 0;
1056
1057 if (data_len > 0xff)
1058 data_len -= 0x100;
1059 if (x_len > 0xff)
1060 x_len -= 0x80;
1061
1062 /* send ACK */
1063 ret = usb_submit_urb(priv->ack, GFP_ATOMIC);
1064
1065 if (!usbtouch->type->max_xc) {
1066 usbtouch->type->max_xc = 2 * x_len;
1067 input_set_abs_params(usbtouch->input, ABS_X,
1068 0, usbtouch->type->max_xc, 0, 0);
1069 usbtouch->type->max_yc = 2 * y_len;
1070 input_set_abs_params(usbtouch->input, ABS_Y,
1071 0, usbtouch->type->max_yc, 0, 0);
1072 }
1073 /*
1074 * The device reports state of IR sensors on X and Y axes.
1075 * Each byte represents "darkness" percentage (0-100) of one element.
1076 * 17" touchscreen reports only 64 x 52 bytes so the resolution is low.
1077 * This also means that there's a limited multi-touch capability but
1078 * it's disabled (and untested) here as there's no X driver for that.
1079 */
1080 begin_x = end_x = begin_y = end_y = -1;
1081 for (x = 0; x < x_len; x++) {
1082 if (begin_x == -1 && packet->data[x] > NEXIO_THRESHOLD) {
1083 begin_x = x;
1084 continue;
1085 }
1086 if (end_x == -1 && begin_x != -1 && packet->data[x] < NEXIO_THRESHOLD) {
1087 end_x = x - 1;
1088 for (y = x_len; y < data_len; y++) {
1089 if (begin_y == -1 && packet->data[y] > NEXIO_THRESHOLD) {
1090 begin_y = y - x_len;
1091 continue;
1092 }
1093 if (end_y == -1 &&
1094 begin_y != -1 && packet->data[y] < NEXIO_THRESHOLD) {
1095 end_y = y - 1 - x_len;
1096 w = end_x - begin_x;
1097 h = end_y - begin_y;
1098 #if 0
1099 /* multi-touch */
1100 input_report_abs(usbtouch->input,
1101 ABS_MT_TOUCH_MAJOR, max(w,h));
1102 input_report_abs(usbtouch->input,
1103 ABS_MT_TOUCH_MINOR, min(x,h));
1104 input_report_abs(usbtouch->input,
1105 ABS_MT_POSITION_X, 2*begin_x+w);
1106 input_report_abs(usbtouch->input,
1107 ABS_MT_POSITION_Y, 2*begin_y+h);
1108 input_report_abs(usbtouch->input,
1109 ABS_MT_ORIENTATION, w > h);
1110 input_mt_sync(usbtouch->input);
1111 #endif
1112 /* single touch */
1113 usbtouch->x = 2 * begin_x + w;
1114 usbtouch->y = 2 * begin_y + h;
1115 usbtouch->touch = packet->flags & 0x01;
1116 begin_y = end_y = -1;
1117 return 1;
1118 }
1119 }
1120 begin_x = end_x = -1;
1121 }
1122
1123 }
1124 return 0;
1125 }
1126 #endif
1127
1128
1129 /*****************************************************************************
1130 * ELO part
1131 */
1132
1133 #ifdef CONFIG_TOUCHSCREEN_USB_ELO
1134
1135 static int elo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
1136 {
1137 dev->x = (pkt[3] << 8) | pkt[2];
1138 dev->y = (pkt[5] << 8) | pkt[4];
1139 dev->touch = pkt[6] > 0;
1140 dev->press = pkt[6];
1141
1142 return 1;
1143 }
1144 #endif
1145
1146
1147 /*****************************************************************************
1148 * the different device descriptors
1149 */
1150 #ifdef MULTI_PACKET
1151 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1152 unsigned char *pkt, int len);
1153 #endif
1154
1155 static struct usbtouch_device_info usbtouch_dev_info[] = {
1156 #ifdef CONFIG_TOUCHSCREEN_USB_ELO
1157 [DEVTYPE_ELO] = {
1158 .min_xc = 0x0,
1159 .max_xc = 0x0fff,
1160 .min_yc = 0x0,
1161 .max_yc = 0x0fff,
1162 .max_press = 0xff,
1163 .rept_size = 8,
1164 .read_data = elo_read_data,
1165 },
1166 #endif
1167
1168 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
1169 [DEVTYPE_EGALAX] = {
1170 .min_xc = 0x0,
1171 .max_xc = 0x07ff,
1172 .min_yc = 0x0,
1173 .max_yc = 0x07ff,
1174 .rept_size = 16,
1175 .process_pkt = usbtouch_process_multi,
1176 .get_pkt_len = egalax_get_pkt_len,
1177 .read_data = egalax_read_data,
1178 .init = egalax_init,
1179 },
1180 #endif
1181
1182 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
1183 [DEVTYPE_PANJIT] = {
1184 .min_xc = 0x0,
1185 .max_xc = 0x0fff,
1186 .min_yc = 0x0,
1187 .max_yc = 0x0fff,
1188 .rept_size = 8,
1189 .read_data = panjit_read_data,
1190 },
1191 #endif
1192
1193 #ifdef CONFIG_TOUCHSCREEN_USB_3M
1194 [DEVTYPE_3M] = {
1195 .min_xc = 0x0,
1196 .max_xc = 0x4000,
1197 .min_yc = 0x0,
1198 .max_yc = 0x4000,
1199 .rept_size = 11,
1200 .read_data = mtouch_read_data,
1201 .alloc = mtouch_alloc,
1202 .init = mtouch_init,
1203 .exit = mtouch_exit,
1204 },
1205 #endif
1206
1207 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
1208 [DEVTYPE_ITM] = {
1209 .min_xc = 0x0,
1210 .max_xc = 0x0fff,
1211 .min_yc = 0x0,
1212 .max_yc = 0x0fff,
1213 .max_press = 0xff,
1214 .rept_size = 8,
1215 .read_data = itm_read_data,
1216 },
1217 #endif
1218
1219 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
1220 [DEVTYPE_ETURBO] = {
1221 .min_xc = 0x0,
1222 .max_xc = 0x07ff,
1223 .min_yc = 0x0,
1224 .max_yc = 0x07ff,
1225 .rept_size = 8,
1226 .process_pkt = usbtouch_process_multi,
1227 .get_pkt_len = eturbo_get_pkt_len,
1228 .read_data = eturbo_read_data,
1229 },
1230 #endif
1231
1232 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
1233 [DEVTYPE_GUNZE] = {
1234 .min_xc = 0x0,
1235 .max_xc = 0x0fff,
1236 .min_yc = 0x0,
1237 .max_yc = 0x0fff,
1238 .rept_size = 4,
1239 .read_data = gunze_read_data,
1240 },
1241 #endif
1242
1243 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
1244 [DEVTYPE_DMC_TSC10] = {
1245 .min_xc = 0x0,
1246 .max_xc = 0x03ff,
1247 .min_yc = 0x0,
1248 .max_yc = 0x03ff,
1249 .rept_size = 5,
1250 .init = dmc_tsc10_init,
1251 .read_data = dmc_tsc10_read_data,
1252 },
1253 #endif
1254
1255 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
1256 [DEVTYPE_IRTOUCH] = {
1257 .min_xc = 0x0,
1258 .max_xc = 0x0fff,
1259 .min_yc = 0x0,
1260 .max_yc = 0x0fff,
1261 .rept_size = 8,
1262 .read_data = irtouch_read_data,
1263 },
1264
1265 [DEVTYPE_IRTOUCH_HIRES] = {
1266 .min_xc = 0x0,
1267 .max_xc = 0x7fff,
1268 .min_yc = 0x0,
1269 .max_yc = 0x7fff,
1270 .rept_size = 8,
1271 .read_data = irtouch_read_data,
1272 },
1273 #endif
1274
1275 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
1276 [DEVTYPE_IDEALTEK] = {
1277 .min_xc = 0x0,
1278 .max_xc = 0x0fff,
1279 .min_yc = 0x0,
1280 .max_yc = 0x0fff,
1281 .rept_size = 8,
1282 .process_pkt = usbtouch_process_multi,
1283 .get_pkt_len = idealtek_get_pkt_len,
1284 .read_data = idealtek_read_data,
1285 },
1286 #endif
1287
1288 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
1289 [DEVTYPE_GENERAL_TOUCH] = {
1290 .min_xc = 0x0,
1291 .max_xc = 0x7fff,
1292 .min_yc = 0x0,
1293 .max_yc = 0x7fff,
1294 .rept_size = 7,
1295 .read_data = general_touch_read_data,
1296 },
1297 #endif
1298
1299 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
1300 [DEVTYPE_GOTOP] = {
1301 .min_xc = 0x0,
1302 .max_xc = 0x03ff,
1303 .min_yc = 0x0,
1304 .max_yc = 0x03ff,
1305 .rept_size = 4,
1306 .read_data = gotop_read_data,
1307 },
1308 #endif
1309
1310 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
1311 [DEVTYPE_JASTEC] = {
1312 .min_xc = 0x0,
1313 .max_xc = 0x0fff,
1314 .min_yc = 0x0,
1315 .max_yc = 0x0fff,
1316 .rept_size = 4,
1317 .read_data = jastec_read_data,
1318 },
1319 #endif
1320
1321 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
1322 [DEVTYPE_E2I] = {
1323 .min_xc = 0x0,
1324 .max_xc = 0x7fff,
1325 .min_yc = 0x0,
1326 .max_yc = 0x7fff,
1327 .rept_size = 6,
1328 .init = e2i_init,
1329 .read_data = e2i_read_data,
1330 },
1331 #endif
1332
1333 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
1334 [DEVTYPE_ZYTRONIC] = {
1335 .min_xc = 0x0,
1336 .max_xc = 0x03ff,
1337 .min_yc = 0x0,
1338 .max_yc = 0x03ff,
1339 .rept_size = 5,
1340 .read_data = zytronic_read_data,
1341 .irq_always = true,
1342 },
1343 #endif
1344
1345 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
1346 [DEVTYPE_TC45USB] = {
1347 .min_xc = 0x0,
1348 .max_xc = 0x0fff,
1349 .min_yc = 0x0,
1350 .max_yc = 0x0fff,
1351 .rept_size = 5,
1352 .read_data = tc45usb_read_data,
1353 },
1354 #endif
1355
1356 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
1357 [DEVTYPE_NEXIO] = {
1358 .rept_size = 1024,
1359 .irq_always = true,
1360 .read_data = nexio_read_data,
1361 .alloc = nexio_alloc,
1362 .init = nexio_init,
1363 .exit = nexio_exit,
1364 },
1365 #endif
1366 #ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
1367 [DEVTYPE_ETOUCH] = {
1368 .min_xc = 0x0,
1369 .max_xc = 0x07ff,
1370 .min_yc = 0x0,
1371 .max_yc = 0x07ff,
1372 .rept_size = 16,
1373 .process_pkt = usbtouch_process_multi,
1374 .get_pkt_len = etouch_get_pkt_len,
1375 .read_data = etouch_read_data,
1376 },
1377 #endif
1378 };
1379
1380
1381 /*****************************************************************************
1382 * Generic Part
1383 */
1384 static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
1385 unsigned char *pkt, int len)
1386 {
1387 struct usbtouch_device_info *type = usbtouch->type;
1388
1389 if (!type->read_data(usbtouch, pkt))
1390 return;
1391
1392 input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch);
1393
1394 if (swap_xy) {
1395 input_report_abs(usbtouch->input, ABS_X, usbtouch->y);
1396 input_report_abs(usbtouch->input, ABS_Y, usbtouch->x);
1397 } else {
1398 input_report_abs(usbtouch->input, ABS_X, usbtouch->x);
1399 input_report_abs(usbtouch->input, ABS_Y, usbtouch->y);
1400 }
1401 if (type->max_press)
1402 input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press);
1403 input_sync(usbtouch->input);
1404 }
1405
1406
1407 #ifdef MULTI_PACKET
1408 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1409 unsigned char *pkt, int len)
1410 {
1411 unsigned char *buffer;
1412 int pkt_len, pos, buf_len, tmp;
1413
1414 /* process buffer */
1415 if (unlikely(usbtouch->buf_len)) {
1416 /* try to get size */
1417 pkt_len = usbtouch->type->get_pkt_len(
1418 usbtouch->buffer, usbtouch->buf_len);
1419
1420 /* drop? */
1421 if (unlikely(!pkt_len))
1422 goto out_flush_buf;
1423
1424 /* need to append -pkt_len bytes before able to get size */
1425 if (unlikely(pkt_len < 0)) {
1426 int append = -pkt_len;
1427 if (unlikely(append > len))
1428 append = len;
1429 if (usbtouch->buf_len + append >= usbtouch->type->rept_size)
1430 goto out_flush_buf;
1431 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append);
1432 usbtouch->buf_len += append;
1433
1434 pkt_len = usbtouch->type->get_pkt_len(
1435 usbtouch->buffer, usbtouch->buf_len);
1436 if (pkt_len < 0)
1437 return;
1438 }
1439
1440 /* append */
1441 tmp = pkt_len - usbtouch->buf_len;
1442 if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size)
1443 goto out_flush_buf;
1444 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp);
1445 usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len);
1446
1447 buffer = pkt + tmp;
1448 buf_len = len - tmp;
1449 } else {
1450 buffer = pkt;
1451 buf_len = len;
1452 }
1453
1454 /* loop over the received packet, process */
1455 pos = 0;
1456 while (pos < buf_len) {
1457 /* get packet len */
1458 pkt_len = usbtouch->type->get_pkt_len(buffer + pos,
1459 buf_len - pos);
1460
1461 /* unknown packet: skip one byte */
1462 if (unlikely(!pkt_len)) {
1463 pos++;
1464 continue;
1465 }
1466
1467 /* full packet: process */
1468 if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) {
1469 usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len);
1470 } else {
1471 /* incomplete packet: save in buffer */
1472 memcpy(usbtouch->buffer, buffer + pos, buf_len - pos);
1473 usbtouch->buf_len = buf_len - pos;
1474 return;
1475 }
1476 pos += pkt_len;
1477 }
1478
1479 out_flush_buf:
1480 usbtouch->buf_len = 0;
1481 return;
1482 }
1483 #endif
1484
1485
1486 static void usbtouch_irq(struct urb *urb)
1487 {
1488 struct usbtouch_usb *usbtouch = urb->context;
1489 struct device *dev = &usbtouch->interface->dev;
1490 int retval;
1491
1492 switch (urb->status) {
1493 case 0:
1494 /* success */
1495 break;
1496 case -ETIME:
1497 /* this urb is timing out */
1498 dev_dbg(dev,
1499 "%s - urb timed out - was the device unplugged?\n",
1500 __func__);
1501 return;
1502 case -ECONNRESET:
1503 case -ENOENT:
1504 case -ESHUTDOWN:
1505 case -EPIPE:
1506 /* this urb is terminated, clean up */
1507 dev_dbg(dev, "%s - urb shutting down with status: %d\n",
1508 __func__, urb->status);
1509 return;
1510 default:
1511 dev_dbg(dev, "%s - nonzero urb status received: %d\n",
1512 __func__, urb->status);
1513 goto exit;
1514 }
1515
1516 usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length);
1517
1518 exit:
1519 usb_mark_last_busy(interface_to_usbdev(usbtouch->interface));
1520 retval = usb_submit_urb(urb, GFP_ATOMIC);
1521 if (retval)
1522 dev_err(dev, "%s - usb_submit_urb failed with result: %d\n",
1523 __func__, retval);
1524 }
1525
1526 static int usbtouch_open(struct input_dev *input)
1527 {
1528 struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1529 int r;
1530
1531 usbtouch->irq->dev = interface_to_usbdev(usbtouch->interface);
1532
1533 r = usb_autopm_get_interface(usbtouch->interface) ? -EIO : 0;
1534 if (r < 0)
1535 goto out;
1536
1537 mutex_lock(&usbtouch->pm_mutex);
1538 if (!usbtouch->type->irq_always) {
1539 if (usb_submit_urb(usbtouch->irq, GFP_KERNEL)) {
1540 r = -EIO;
1541 goto out_put;
1542 }
1543 }
1544
1545 usbtouch->interface->needs_remote_wakeup = 1;
1546 usbtouch->is_open = true;
1547 out_put:
1548 mutex_unlock(&usbtouch->pm_mutex);
1549 usb_autopm_put_interface(usbtouch->interface);
1550 out:
1551 return r;
1552 }
1553
1554 static void usbtouch_close(struct input_dev *input)
1555 {
1556 struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1557 int r;
1558
1559 mutex_lock(&usbtouch->pm_mutex);
1560 if (!usbtouch->type->irq_always)
1561 usb_kill_urb(usbtouch->irq);
1562 usbtouch->is_open = false;
1563 mutex_unlock(&usbtouch->pm_mutex);
1564
1565 r = usb_autopm_get_interface(usbtouch->interface);
1566 usbtouch->interface->needs_remote_wakeup = 0;
1567 if (!r)
1568 usb_autopm_put_interface(usbtouch->interface);
1569 }
1570
1571 static int usbtouch_suspend
1572 (struct usb_interface *intf, pm_message_t message)
1573 {
1574 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1575
1576 usb_kill_urb(usbtouch->irq);
1577
1578 return 0;
1579 }
1580
1581 static int usbtouch_resume(struct usb_interface *intf)
1582 {
1583 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1584 int result = 0;
1585
1586 mutex_lock(&usbtouch->pm_mutex);
1587 if (usbtouch->is_open || usbtouch->type->irq_always)
1588 result = usb_submit_urb(usbtouch->irq, GFP_NOIO);
1589 mutex_unlock(&usbtouch->pm_mutex);
1590
1591 return result;
1592 }
1593
1594 static int usbtouch_reset_resume(struct usb_interface *intf)
1595 {
1596 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1597 int err = 0;
1598
1599 /* reinit the device */
1600 if (usbtouch->type->init) {
1601 err = usbtouch->type->init(usbtouch);
1602 if (err) {
1603 dev_dbg(&intf->dev,
1604 "%s - type->init() failed, err: %d\n",
1605 __func__, err);
1606 return err;
1607 }
1608 }
1609
1610 /* restart IO if needed */
1611 mutex_lock(&usbtouch->pm_mutex);
1612 if (usbtouch->is_open)
1613 err = usb_submit_urb(usbtouch->irq, GFP_NOIO);
1614 mutex_unlock(&usbtouch->pm_mutex);
1615
1616 return err;
1617 }
1618
1619 static void usbtouch_free_buffers(struct usb_device *udev,
1620 struct usbtouch_usb *usbtouch)
1621 {
1622 usb_free_coherent(udev, usbtouch->data_size,
1623 usbtouch->data, usbtouch->data_dma);
1624 kfree(usbtouch->buffer);
1625 }
1626
1627 static struct usb_endpoint_descriptor *
1628 usbtouch_get_input_endpoint(struct usb_host_interface *interface)
1629 {
1630 int i;
1631
1632 for (i = 0; i < interface->desc.bNumEndpoints; i++)
1633 if (usb_endpoint_dir_in(&interface->endpoint[i].desc))
1634 return &interface->endpoint[i].desc;
1635
1636 return NULL;
1637 }
1638
1639 static int usbtouch_probe(struct usb_interface *intf,
1640 const struct usb_device_id *id)
1641 {
1642 struct usbtouch_usb *usbtouch;
1643 struct input_dev *input_dev;
1644 struct usb_endpoint_descriptor *endpoint;
1645 struct usb_device *udev = interface_to_usbdev(intf);
1646 struct usbtouch_device_info *type;
1647 int err = -ENOMEM;
1648
1649 /* some devices are ignored */
1650 if (id->driver_info == DEVTYPE_IGNORE)
1651 return -ENODEV;
1652
1653 endpoint = usbtouch_get_input_endpoint(intf->cur_altsetting);
1654 if (!endpoint)
1655 return -ENXIO;
1656
1657 usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL);
1658 input_dev = input_allocate_device();
1659 if (!usbtouch || !input_dev)
1660 goto out_free;
1661
1662 mutex_init(&usbtouch->pm_mutex);
1663
1664 type = &usbtouch_dev_info[id->driver_info];
1665 usbtouch->type = type;
1666 if (!type->process_pkt)
1667 type->process_pkt = usbtouch_process_pkt;
1668
1669 usbtouch->data_size = type->rept_size;
1670 if (type->get_pkt_len) {
1671 /*
1672 * When dealing with variable-length packets we should
1673 * not request more than wMaxPacketSize bytes at once
1674 * as we do not know if there is more data coming or
1675 * we filled exactly wMaxPacketSize bytes and there is
1676 * nothing else.
1677 */
1678 usbtouch->data_size = min(usbtouch->data_size,
1679 usb_endpoint_maxp(endpoint));
1680 }
1681
1682 usbtouch->data = usb_alloc_coherent(udev, usbtouch->data_size,
1683 GFP_KERNEL, &usbtouch->data_dma);
1684 if (!usbtouch->data)
1685 goto out_free;
1686
1687 if (type->get_pkt_len) {
1688 usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL);
1689 if (!usbtouch->buffer)
1690 goto out_free_buffers;
1691 }
1692
1693 usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
1694 if (!usbtouch->irq) {
1695 dev_dbg(&intf->dev,
1696 "%s - usb_alloc_urb failed: usbtouch->irq\n", __func__);
1697 goto out_free_buffers;
1698 }
1699
1700 usbtouch->interface = intf;
1701 usbtouch->input = input_dev;
1702
1703 if (udev->manufacturer)
1704 strlcpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name));
1705
1706 if (udev->product) {
1707 if (udev->manufacturer)
1708 strlcat(usbtouch->name, " ", sizeof(usbtouch->name));
1709 strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name));
1710 }
1711
1712 if (!strlen(usbtouch->name))
1713 snprintf(usbtouch->name, sizeof(usbtouch->name),
1714 "USB Touchscreen %04x:%04x",
1715 le16_to_cpu(udev->descriptor.idVendor),
1716 le16_to_cpu(udev->descriptor.idProduct));
1717
1718 usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys));
1719 strlcat(usbtouch->phys, "/input0", sizeof(usbtouch->phys));
1720
1721 input_dev->name = usbtouch->name;
1722 input_dev->phys = usbtouch->phys;
1723 usb_to_input_id(udev, &input_dev->id);
1724 input_dev->dev.parent = &intf->dev;
1725
1726 input_set_drvdata(input_dev, usbtouch);
1727
1728 input_dev->open = usbtouch_open;
1729 input_dev->close = usbtouch_close;
1730
1731 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
1732 input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
1733 input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0);
1734 input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0);
1735 if (type->max_press)
1736 input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press,
1737 type->max_press, 0, 0);
1738
1739 if (usb_endpoint_type(endpoint) == USB_ENDPOINT_XFER_INT)
1740 usb_fill_int_urb(usbtouch->irq, udev,
1741 usb_rcvintpipe(udev, endpoint->bEndpointAddress),
1742 usbtouch->data, usbtouch->data_size,
1743 usbtouch_irq, usbtouch, endpoint->bInterval);
1744 else
1745 usb_fill_bulk_urb(usbtouch->irq, udev,
1746 usb_rcvbulkpipe(udev, endpoint->bEndpointAddress),
1747 usbtouch->data, usbtouch->data_size,
1748 usbtouch_irq, usbtouch);
1749
1750 usbtouch->irq->dev = udev;
1751 usbtouch->irq->transfer_dma = usbtouch->data_dma;
1752 usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1753
1754 /* device specific allocations */
1755 if (type->alloc) {
1756 err = type->alloc(usbtouch);
1757 if (err) {
1758 dev_dbg(&intf->dev,
1759 "%s - type->alloc() failed, err: %d\n",
1760 __func__, err);
1761 goto out_free_urb;
1762 }
1763 }
1764
1765 /* device specific initialisation*/
1766 if (type->init) {
1767 err = type->init(usbtouch);
1768 if (err) {
1769 dev_dbg(&intf->dev,
1770 "%s - type->init() failed, err: %d\n",
1771 __func__, err);
1772 goto out_do_exit;
1773 }
1774 }
1775
1776 err = input_register_device(usbtouch->input);
1777 if (err) {
1778 dev_dbg(&intf->dev,
1779 "%s - input_register_device failed, err: %d\n",
1780 __func__, err);
1781 goto out_do_exit;
1782 }
1783
1784 usb_set_intfdata(intf, usbtouch);
1785
1786 if (usbtouch->type->irq_always) {
1787 /* this can't fail */
1788 usb_autopm_get_interface(intf);
1789 err = usb_submit_urb(usbtouch->irq, GFP_KERNEL);
1790 if (err) {
1791 usb_autopm_put_interface(intf);
1792 dev_err(&intf->dev,
1793 "%s - usb_submit_urb failed with result: %d\n",
1794 __func__, err);
1795 goto out_unregister_input;
1796 }
1797 }
1798
1799 return 0;
1800
1801 out_unregister_input:
1802 input_unregister_device(input_dev);
1803 input_dev = NULL;
1804 out_do_exit:
1805 if (type->exit)
1806 type->exit(usbtouch);
1807 out_free_urb:
1808 usb_free_urb(usbtouch->irq);
1809 out_free_buffers:
1810 usbtouch_free_buffers(udev, usbtouch);
1811 out_free:
1812 input_free_device(input_dev);
1813 kfree(usbtouch);
1814 return err;
1815 }
1816
1817 static void usbtouch_disconnect(struct usb_interface *intf)
1818 {
1819 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1820
1821 if (!usbtouch)
1822 return;
1823
1824 dev_dbg(&intf->dev,
1825 "%s - usbtouch is initialized, cleaning up\n", __func__);
1826
1827 usb_set_intfdata(intf, NULL);
1828 /* this will stop IO via close */
1829 input_unregister_device(usbtouch->input);
1830 usb_free_urb(usbtouch->irq);
1831 if (usbtouch->type->exit)
1832 usbtouch->type->exit(usbtouch);
1833 usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch);
1834 kfree(usbtouch);
1835 }
1836
1837 MODULE_DEVICE_TABLE(usb, usbtouch_devices);
1838
1839 static struct usb_driver usbtouch_driver = {
1840 .name = "usbtouchscreen",
1841 .probe = usbtouch_probe,
1842 .disconnect = usbtouch_disconnect,
1843 .suspend = usbtouch_suspend,
1844 .resume = usbtouch_resume,
1845 .reset_resume = usbtouch_reset_resume,
1846 .id_table = usbtouch_devices,
1847 .supports_autosuspend = 1,
1848 };
1849
1850 module_usb_driver(usbtouch_driver);
1851
1852 MODULE_AUTHOR("Daniel Ritz <daniel.ritz@gmx.ch>");
1853 MODULE_DESCRIPTION("USB Touchscreen Driver");
1854 MODULE_LICENSE("GPL");
1855
1856 MODULE_ALIAS("touchkitusb");
1857 MODULE_ALIAS("itmtouch");
1858 MODULE_ALIAS("mtouchusb");
Linux with added FPC-III support