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staging: usbip: bugfix for isochronous packets and optimization
[zen-stable.git] / drivers / input / touchscreen / usbtouchscreen.c
blob73fd6642b681b92a074b6e8ab2619b65768292f7
1 /******************************************************************************
2 * usbtouchscreen.c
3 * Driver for USB Touchscreens, supporting those devices:
4 * - eGalax Touchkit
5 * includes eTurboTouch CT-410/510/700
6 * - 3M/Microtouch EX II series
7 * - ITM
8 * - PanJit TouchSet
9 * - eTurboTouch
10 * - Gunze AHL61
11 * - DMC TSC-10/25
12 * - IRTOUCHSYSTEMS/UNITOP
13 * - IdealTEK URTC1000
14 * - General Touch
15 * - GoTop Super_Q2/GogoPen/PenPower tablets
16 * - JASTEC USB touch controller/DigiTech DTR-02U
17 * - Zytronic capacitive touchscreen
18 * - NEXIO/iNexio
19 *
20 * Copyright (C) 2004-2007 by Daniel Ritz <daniel.ritz@gmx.ch>
21 * Copyright (C) by Todd E. Johnson (mtouchusb.c)
22 *
23 * This program is free software; you can redistribute it and/or
24 * modify it under the terms of the GNU General Public License as
25 * published by the Free Software Foundation; either version 2 of the
26 * License, or (at your option) any later version.
27 *
28 * This program is distributed in the hope that it will be useful, but
29 * WITHOUT ANY WARRANTY; without even the implied warranty of
30 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
31 * General Public License for more details.
32 *
33 * You should have received a copy of the GNU General Public License
34 * along with this program; if not, write to the Free Software
35 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
36 *
37 * Driver is based on touchkitusb.c
38 * - ITM parts are from itmtouch.c
39 * - 3M parts are from mtouchusb.c
40 * - PanJit parts are from an unmerged driver by Lanslott Gish
41 * - DMC TSC 10/25 are from Holger Schurig, with ideas from an unmerged
42 * driver from Marius Vollmer
43 *
44 *****************************************************************************/
45
46 //#define DEBUG
47
48 #include <linux/kernel.h>
49 #include <linux/slab.h>
50 #include <linux/input.h>
51 #include <linux/module.h>
52 #include <linux/init.h>
53 #include <linux/usb.h>
54 #include <linux/usb/input.h>
55 #include <linux/hid.h>
56
57
58 #define DRIVER_VERSION "v0.6"
59 #define DRIVER_AUTHOR "Daniel Ritz <daniel.ritz@gmx.ch>"
60 #define DRIVER_DESC "USB Touchscreen Driver"
61
62 static int swap_xy;
63 module_param(swap_xy, bool, 0644);
64 MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");
65
66 static int hwcalib_xy;
67 module_param(hwcalib_xy, bool, 0644);
68 MODULE_PARM_DESC(hwcalib_xy, "If set hw-calibrated X/Y are used if available");
69
70 /* device specifc data/functions */
71 struct usbtouch_usb;
72 struct usbtouch_device_info {
73 int min_xc, max_xc;
74 int min_yc, max_yc;
75 int min_press, max_press;
76 int rept_size;
77
78 /*
79 * Always service the USB devices irq not just when the input device is
80 * open. This is useful when devices have a watchdog which prevents us
81 * from periodically polling the device. Leave this unset unless your
82 * touchscreen device requires it, as it does consume more of the USB
83 * bandwidth.
84 */
85 bool irq_always;
86
87 void (*process_pkt) (struct usbtouch_usb *usbtouch, unsigned char *pkt, int len);
88
89 /*
90 * used to get the packet len. possible return values:
91 * > 0: packet len
92 * = 0: skip one byte
93 * < 0: -return value more bytes needed
94 */
95 int (*get_pkt_len) (unsigned char *pkt, int len);
96
97 int (*read_data) (struct usbtouch_usb *usbtouch, unsigned char *pkt);
98 int (*alloc) (struct usbtouch_usb *usbtouch);
99 int (*init) (struct usbtouch_usb *usbtouch);
100 void (*exit) (struct usbtouch_usb *usbtouch);
101 };
102
103 /* a usbtouch device */
104 struct usbtouch_usb {
105 unsigned char *data;
106 dma_addr_t data_dma;
107 unsigned char *buffer;
108 int buf_len;
109 struct urb *irq;
110 struct usb_interface *interface;
111 struct input_dev *input;
112 struct usbtouch_device_info *type;
113 char name[128];
114 char phys[64];
115 void *priv;
116
117 int x, y;
118 int touch, press;
119 };
120
121
122 /* device types */
123 enum {
124 DEVTYPE_IGNORE = -1,
125 DEVTYPE_EGALAX,
126 DEVTYPE_PANJIT,
127 DEVTYPE_3M,
128 DEVTYPE_ITM,
129 DEVTYPE_ETURBO,
130 DEVTYPE_GUNZE,
131 DEVTYPE_DMC_TSC10,
132 DEVTYPE_IRTOUCH,
133 DEVTYPE_IDEALTEK,
134 DEVTYPE_GENERAL_TOUCH,
135 DEVTYPE_GOTOP,
136 DEVTYPE_JASTEC,
137 DEVTYPE_E2I,
138 DEVTYPE_ZYTRONIC,
139 DEVTYPE_TC45USB,
140 DEVTYPE_NEXIO,
141 };
142
143 #define USB_DEVICE_HID_CLASS(vend, prod) \
144 .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS \
145 | USB_DEVICE_ID_MATCH_INT_PROTOCOL \
146 | USB_DEVICE_ID_MATCH_DEVICE, \
147 .idVendor = (vend), \
148 .idProduct = (prod), \
149 .bInterfaceClass = USB_INTERFACE_CLASS_HID, \
150 .bInterfaceProtocol = USB_INTERFACE_PROTOCOL_MOUSE
151
152 static const struct usb_device_id usbtouch_devices[] = {
153 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
154 /* ignore the HID capable devices, handled by usbhid */
155 {USB_DEVICE_HID_CLASS(0x0eef, 0x0001), .driver_info = DEVTYPE_IGNORE},
156 {USB_DEVICE_HID_CLASS(0x0eef, 0x0002), .driver_info = DEVTYPE_IGNORE},
157
158 /* normal device IDs */
159 {USB_DEVICE(0x3823, 0x0001), .driver_info = DEVTYPE_EGALAX},
160 {USB_DEVICE(0x3823, 0x0002), .driver_info = DEVTYPE_EGALAX},
161 {USB_DEVICE(0x0123, 0x0001), .driver_info = DEVTYPE_EGALAX},
162 {USB_DEVICE(0x0eef, 0x0001), .driver_info = DEVTYPE_EGALAX},
163 {USB_DEVICE(0x0eef, 0x0002), .driver_info = DEVTYPE_EGALAX},
164 {USB_DEVICE(0x1234, 0x0001), .driver_info = DEVTYPE_EGALAX},
165 {USB_DEVICE(0x1234, 0x0002), .driver_info = DEVTYPE_EGALAX},
166 #endif
167
168 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
169 {USB_DEVICE(0x134c, 0x0001), .driver_info = DEVTYPE_PANJIT},
170 {USB_DEVICE(0x134c, 0x0002), .driver_info = DEVTYPE_PANJIT},
171 {USB_DEVICE(0x134c, 0x0003), .driver_info = DEVTYPE_PANJIT},
172 {USB_DEVICE(0x134c, 0x0004), .driver_info = DEVTYPE_PANJIT},
173 #endif
174
175 #ifdef CONFIG_TOUCHSCREEN_USB_3M
176 {USB_DEVICE(0x0596, 0x0001), .driver_info = DEVTYPE_3M},
177 #endif
178
179 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
180 {USB_DEVICE(0x0403, 0xf9e9), .driver_info = DEVTYPE_ITM},
181 {USB_DEVICE(0x16e3, 0xf9e9), .driver_info = DEVTYPE_ITM},
182 #endif
183
184 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
185 {USB_DEVICE(0x1234, 0x5678), .driver_info = DEVTYPE_ETURBO},
186 #endif
187
188 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
189 {USB_DEVICE(0x0637, 0x0001), .driver_info = DEVTYPE_GUNZE},
190 #endif
191
192 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
193 {USB_DEVICE(0x0afa, 0x03e8), .driver_info = DEVTYPE_DMC_TSC10},
194 #endif
195
196 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
197 {USB_DEVICE(0x595a, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
198 {USB_DEVICE(0x6615, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
199 #endif
200
201 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
202 {USB_DEVICE(0x1391, 0x1000), .driver_info = DEVTYPE_IDEALTEK},
203 #endif
204
205 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
206 {USB_DEVICE(0x0dfc, 0x0001), .driver_info = DEVTYPE_GENERAL_TOUCH},
207 #endif
208
209 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
210 {USB_DEVICE(0x08f2, 0x007f), .driver_info = DEVTYPE_GOTOP},
211 {USB_DEVICE(0x08f2, 0x00ce), .driver_info = DEVTYPE_GOTOP},
212 {USB_DEVICE(0x08f2, 0x00f4), .driver_info = DEVTYPE_GOTOP},
213 #endif
214
215 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
216 {USB_DEVICE(0x0f92, 0x0001), .driver_info = DEVTYPE_JASTEC},
217 #endif
218
219 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
220 {USB_DEVICE(0x1ac7, 0x0001), .driver_info = DEVTYPE_E2I},
221 #endif
222
223 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
224 {USB_DEVICE(0x14c8, 0x0003), .driver_info = DEVTYPE_ZYTRONIC},
225 #endif
226
227 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
228 /* TC5UH */
229 {USB_DEVICE(0x0664, 0x0309), .driver_info = DEVTYPE_TC45USB},
230 /* TC4UM */
231 {USB_DEVICE(0x0664, 0x0306), .driver_info = DEVTYPE_TC45USB},
232 #endif
233
234 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
235 /* data interface only */
236 {USB_DEVICE_AND_INTERFACE_INFO(0x10f0, 0x2002, 0x0a, 0x00, 0x00),
237 .driver_info = DEVTYPE_NEXIO},
238 {USB_DEVICE_AND_INTERFACE_INFO(0x1870, 0x0001, 0x0a, 0x00, 0x00),
239 .driver_info = DEVTYPE_NEXIO},
240 #endif
241
242 {}
243 };
244
245
246 /*****************************************************************************
247 * e2i Part
248 */
249
250 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
251 static int e2i_init(struct usbtouch_usb *usbtouch)
252 {
253 int ret;
254 struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
255
256 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
257 0x01, 0x02, 0x0000, 0x0081,
258 NULL, 0, USB_CTRL_SET_TIMEOUT);
259
260 dbg("%s - usb_control_msg - E2I_RESET - bytes|err: %d",
261 __func__, ret);
262 return ret;
263 }
264
265 static int e2i_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
266 {
267 int tmp = (pkt[0] << 8) | pkt[1];
268 dev->x = (pkt[2] << 8) | pkt[3];
269 dev->y = (pkt[4] << 8) | pkt[5];
270
271 tmp = tmp - 0xA000;
272 dev->touch = (tmp > 0);
273 dev->press = (tmp > 0 ? tmp : 0);
274
275 return 1;
276 }
277 #endif
278
279
280 /*****************************************************************************
281 * eGalax part
282 */
283
284 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
285
286 #ifndef MULTI_PACKET
287 #define MULTI_PACKET
288 #endif
289
290 #define EGALAX_PKT_TYPE_MASK 0xFE
291 #define EGALAX_PKT_TYPE_REPT 0x80
292 #define EGALAX_PKT_TYPE_DIAG 0x0A
293
294 static int egalax_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
295 {
296 if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT)
297 return 0;
298
299 dev->x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F);
300 dev->y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F);
301 dev->touch = pkt[0] & 0x01;
302
303 return 1;
304 }
305
306 static int egalax_get_pkt_len(unsigned char *buf, int len)
307 {
308 switch (buf[0] & EGALAX_PKT_TYPE_MASK) {
309 case EGALAX_PKT_TYPE_REPT:
310 return 5;
311
312 case EGALAX_PKT_TYPE_DIAG:
313 if (len < 2)
314 return -1;
315
316 return buf[1] + 2;
317 }
318
319 return 0;
320 }
321 #endif
322
323
324 /*****************************************************************************
325 * PanJit Part
326 */
327 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
328 static int panjit_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
329 {
330 dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
331 dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
332 dev->touch = pkt[0] & 0x01;
333
334 return 1;
335 }
336 #endif
337
338
339 /*****************************************************************************
340 * 3M/Microtouch Part
341 */
342 #ifdef CONFIG_TOUCHSCREEN_USB_3M
343
344 #define MTOUCHUSB_ASYNC_REPORT 1
345 #define MTOUCHUSB_RESET 7
346 #define MTOUCHUSB_REQ_CTRLLR_ID 10
347
348 static int mtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
349 {
350 if (hwcalib_xy) {
351 dev->x = (pkt[4] << 8) | pkt[3];
352 dev->y = 0xffff - ((pkt[6] << 8) | pkt[5]);
353 } else {
354 dev->x = (pkt[8] << 8) | pkt[7];
355 dev->y = (pkt[10] << 8) | pkt[9];
356 }
357 dev->touch = (pkt[2] & 0x40) ? 1 : 0;
358
359 return 1;
360 }
361
362 static int mtouch_init(struct usbtouch_usb *usbtouch)
363 {
364 int ret, i;
365 struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
366
367 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
368 MTOUCHUSB_RESET,
369 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
370 1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
371 dbg("%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d",
372 __func__, ret);
373 if (ret < 0)
374 return ret;
375 msleep(150);
376
377 for (i = 0; i < 3; i++) {
378 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
379 MTOUCHUSB_ASYNC_REPORT,
380 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
381 1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT);
382 dbg("%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d",
383 __func__, ret);
384 if (ret >= 0)
385 break;
386 if (ret != -EPIPE)
387 return ret;
388 }
389
390 /* Default min/max xy are the raw values, override if using hw-calib */
391 if (hwcalib_xy) {
392 input_set_abs_params(usbtouch->input, ABS_X, 0, 0xffff, 0, 0);
393 input_set_abs_params(usbtouch->input, ABS_Y, 0, 0xffff, 0, 0);
394 }
395
396 return 0;
397 }
398 #endif
399
400
401 /*****************************************************************************
402 * ITM Part
403 */
404 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
405 static int itm_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
406 {
407 int touch;
408 /*
409 * ITM devices report invalid x/y data if not touched.
410 * if the screen was touched before but is not touched any more
411 * report touch as 0 with the last valid x/y data once. then stop
412 * reporting data until touched again.
413 */
414 dev->press = ((pkt[2] & 0x01) << 7) | (pkt[5] & 0x7F);
415
416 touch = ~pkt[7] & 0x20;
417 if (!touch) {
418 if (dev->touch) {
419 dev->touch = 0;
420 return 1;
421 }
422
423 return 0;
424 }
425
426 dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F);
427 dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F);
428 dev->touch = touch;
429
430 return 1;
431 }
432 #endif
433
434
435 /*****************************************************************************
436 * eTurboTouch part
437 */
438 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
439 #ifndef MULTI_PACKET
440 #define MULTI_PACKET
441 #endif
442 static int eturbo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
443 {
444 unsigned int shift;
445
446 /* packets should start with sync */
447 if (!(pkt[0] & 0x80))
448 return 0;
449
450 shift = (6 - (pkt[0] & 0x03));
451 dev->x = ((pkt[3] << 7) | pkt[4]) >> shift;
452 dev->y = ((pkt[1] << 7) | pkt[2]) >> shift;
453 dev->touch = (pkt[0] & 0x10) ? 1 : 0;
454
455 return 1;
456 }
457
458 static int eturbo_get_pkt_len(unsigned char *buf, int len)
459 {
460 if (buf[0] & 0x80)
461 return 5;
462 if (buf[0] == 0x01)
463 return 3;
464 return 0;
465 }
466 #endif
467
468
469 /*****************************************************************************
470 * Gunze part
471 */
472 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
473 static int gunze_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
474 {
475 if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80))
476 return 0;
477
478 dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F);
479 dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F);
480 dev->touch = pkt[0] & 0x20;
481
482 return 1;
483 }
484 #endif
485
486 /*****************************************************************************
487 * DMC TSC-10/25 Part
488 *
489 * Documentation about the controller and it's protocol can be found at
490 * http://www.dmccoltd.com/files/controler/tsc10usb_pi_e.pdf
491 * http://www.dmccoltd.com/files/controler/tsc25_usb_e.pdf
492 */
493 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
494
495 /* supported data rates. currently using 130 */
496 #define TSC10_RATE_POINT 0x50
497 #define TSC10_RATE_30 0x40
498 #define TSC10_RATE_50 0x41
499 #define TSC10_RATE_80 0x42
500 #define TSC10_RATE_100 0x43
501 #define TSC10_RATE_130 0x44
502 #define TSC10_RATE_150 0x45
503
504 /* commands */
505 #define TSC10_CMD_RESET 0x55
506 #define TSC10_CMD_RATE 0x05
507 #define TSC10_CMD_DATA1 0x01
508
509 static int dmc_tsc10_init(struct usbtouch_usb *usbtouch)
510 {
511 struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
512 int ret = -ENOMEM;
513 unsigned char *buf;
514
515 buf = kmalloc(2, GFP_NOIO);
516 if (!buf)
517 goto err_nobuf;
518 /* reset */
519 buf[0] = buf[1] = 0xFF;
520 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
521 TSC10_CMD_RESET,
522 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
523 0, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
524 if (ret < 0)
525 goto err_out;
526 if (buf[0] != 0x06) {
527 ret = -ENODEV;
528 goto err_out;
529 }
530
531 /* set coordinate output rate */
532 buf[0] = buf[1] = 0xFF;
533 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
534 TSC10_CMD_RATE,
535 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
536 TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
537 if (ret < 0)
538 goto err_out;
539 if ((buf[0] != 0x06) && (buf[0] != 0x15 || buf[1] != 0x01)) {
540 ret = -ENODEV;
541 goto err_out;
542 }
543
544 /* start sending data */
545 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
546 TSC10_CMD_DATA1,
547 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
548 0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
549 err_out:
550 kfree(buf);
551 err_nobuf:
552 return ret;
553 }
554
555
556 static int dmc_tsc10_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
557 {
558 dev->x = ((pkt[2] & 0x03) << 8) | pkt[1];
559 dev->y = ((pkt[4] & 0x03) << 8) | pkt[3];
560 dev->touch = pkt[0] & 0x01;
561
562 return 1;
563 }
564 #endif
565
566
567 /*****************************************************************************
568 * IRTOUCH Part
569 */
570 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
571 static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
572 {
573 dev->x = (pkt[3] << 8) | pkt[2];
574 dev->y = (pkt[5] << 8) | pkt[4];
575 dev->touch = (pkt[1] & 0x03) ? 1 : 0;
576
577 return 1;
578 }
579 #endif
580
581 /*****************************************************************************
582 * ET&T TC5UH/TC4UM part
583 */
584 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
585 static int tc45usb_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
586 {
587 dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
588 dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
589 dev->touch = pkt[0] & 0x01;
590
591 return 1;
592 }
593 #endif
594
595 /*****************************************************************************
596 * IdealTEK URTC1000 Part
597 */
598 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
599 #ifndef MULTI_PACKET
600 #define MULTI_PACKET
601 #endif
602 static int idealtek_get_pkt_len(unsigned char *buf, int len)
603 {
604 if (buf[0] & 0x80)
605 return 5;
606 if (buf[0] == 0x01)
607 return len;
608 return 0;
609 }
610
611 static int idealtek_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
612 {
613 switch (pkt[0] & 0x98) {
614 case 0x88:
615 /* touch data in IdealTEK mode */
616 dev->x = (pkt[1] << 5) | (pkt[2] >> 2);
617 dev->y = (pkt[3] << 5) | (pkt[4] >> 2);
618 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
619 return 1;
620
621 case 0x98:
622 /* touch data in MT emulation mode */
623 dev->x = (pkt[2] << 5) | (pkt[1] >> 2);
624 dev->y = (pkt[4] << 5) | (pkt[3] >> 2);
625 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
626 return 1;
627
628 default:
629 return 0;
630 }
631 }
632 #endif
633
634 /*****************************************************************************
635 * General Touch Part
636 */
637 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
638 static int general_touch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
639 {
640 dev->x = (pkt[2] << 8) | pkt[1];
641 dev->y = (pkt[4] << 8) | pkt[3];
642 dev->press = pkt[5] & 0xff;
643 dev->touch = pkt[0] & 0x01;
644
645 return 1;
646 }
647 #endif
648
649 /*****************************************************************************
650 * GoTop Part
651 */
652 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
653 static int gotop_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
654 {
655 dev->x = ((pkt[1] & 0x38) << 4) | pkt[2];
656 dev->y = ((pkt[1] & 0x07) << 7) | pkt[3];
657 dev->touch = pkt[0] & 0x01;
658
659 return 1;
660 }
661 #endif
662
663 /*****************************************************************************
664 * JASTEC Part
665 */
666 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
667 static int jastec_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
668 {
669 dev->x = ((pkt[0] & 0x3f) << 6) | (pkt[2] & 0x3f);
670 dev->y = ((pkt[1] & 0x3f) << 6) | (pkt[3] & 0x3f);
671 dev->touch = (pkt[0] & 0x40) >> 6;
672
673 return 1;
674 }
675 #endif
676
677 /*****************************************************************************
678 * Zytronic Part
679 */
680 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
681 static int zytronic_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
682 {
683 switch (pkt[0]) {
684 case 0x3A: /* command response */
685 dbg("%s: Command response %d", __func__, pkt[1]);
686 break;
687
688 case 0xC0: /* down */
689 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
690 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
691 dev->touch = 1;
692 dbg("%s: down %d,%d", __func__, dev->x, dev->y);
693 return 1;
694
695 case 0x80: /* up */
696 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
697 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
698 dev->touch = 0;
699 dbg("%s: up %d,%d", __func__, dev->x, dev->y);
700 return 1;
701
702 default:
703 dbg("%s: Unknown return %d", __func__, pkt[0]);
704 break;
705 }
706
707 return 0;
708 }
709 #endif
710
711 /*****************************************************************************
712 * NEXIO Part
713 */
714 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
715
716 #define NEXIO_TIMEOUT 5000
717 #define NEXIO_BUFSIZE 1024
718 #define NEXIO_THRESHOLD 50
719
720 struct nexio_priv {
721 struct urb *ack;
722 unsigned char *ack_buf;
723 };
724
725 struct nexio_touch_packet {
726 u8 flags; /* 0xe1 = touch, 0xe1 = release */
727 __be16 data_len; /* total bytes of touch data */
728 __be16 x_len; /* bytes for X axis */
729 __be16 y_len; /* bytes for Y axis */
730 u8 data[];
731 } __attribute__ ((packed));
732
733 static unsigned char nexio_ack_pkt[2] = { 0xaa, 0x02 };
734 static unsigned char nexio_init_pkt[4] = { 0x82, 0x04, 0x0a, 0x0f };
735
736 static void nexio_ack_complete(struct urb *urb)
737 {
738 }
739
740 static int nexio_alloc(struct usbtouch_usb *usbtouch)
741 {
742 struct nexio_priv *priv;
743 int ret = -ENOMEM;
744
745 usbtouch->priv = kmalloc(sizeof(struct nexio_priv), GFP_KERNEL);
746 if (!usbtouch->priv)
747 goto out_buf;
748
749 priv = usbtouch->priv;
750
751 priv->ack_buf = kmemdup(nexio_ack_pkt, sizeof(nexio_ack_pkt),
752 GFP_KERNEL);
753 if (!priv->ack_buf)
754 goto err_priv;
755
756 priv->ack = usb_alloc_urb(0, GFP_KERNEL);
757 if (!priv->ack) {
758 dbg("%s - usb_alloc_urb failed: usbtouch->ack", __func__);
759 goto err_ack_buf;
760 }
761
762 return 0;
763
764 err_ack_buf:
765 kfree(priv->ack_buf);
766 err_priv:
767 kfree(priv);
768 out_buf:
769 return ret;
770 }
771
772 static int nexio_init(struct usbtouch_usb *usbtouch)
773 {
774 struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
775 struct usb_host_interface *interface = usbtouch->interface->cur_altsetting;
776 struct nexio_priv *priv = usbtouch->priv;
777 int ret = -ENOMEM;
778 int actual_len, i;
779 unsigned char *buf;
780 char *firmware_ver = NULL, *device_name = NULL;
781 int input_ep = 0, output_ep = 0;
782
783 /* find first input and output endpoint */
784 for (i = 0; i < interface->desc.bNumEndpoints; i++) {
785 if (!input_ep &&
786 usb_endpoint_dir_in(&interface->endpoint[i].desc))
787 input_ep = interface->endpoint[i].desc.bEndpointAddress;
788 if (!output_ep &&
789 usb_endpoint_dir_out(&interface->endpoint[i].desc))
790 output_ep = interface->endpoint[i].desc.bEndpointAddress;
791 }
792 if (!input_ep || !output_ep)
793 return -ENXIO;
794
795 buf = kmalloc(NEXIO_BUFSIZE, GFP_NOIO);
796 if (!buf)
797 goto out_buf;
798
799 /* two empty reads */
800 for (i = 0; i < 2; i++) {
801 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
802 buf, NEXIO_BUFSIZE, &actual_len,
803 NEXIO_TIMEOUT);
804 if (ret < 0)
805 goto out_buf;
806 }
807
808 /* send init command */
809 memcpy(buf, nexio_init_pkt, sizeof(nexio_init_pkt));
810 ret = usb_bulk_msg(dev, usb_sndbulkpipe(dev, output_ep),
811 buf, sizeof(nexio_init_pkt), &actual_len,
812 NEXIO_TIMEOUT);
813 if (ret < 0)
814 goto out_buf;
815
816 /* read replies */
817 for (i = 0; i < 3; i++) {
818 memset(buf, 0, NEXIO_BUFSIZE);
819 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
820 buf, NEXIO_BUFSIZE, &actual_len,
821 NEXIO_TIMEOUT);
822 if (ret < 0 || actual_len < 1 || buf[1] != actual_len)
823 continue;
824 switch (buf[0]) {
825 case 0x83: /* firmware version */
826 if (!firmware_ver)
827 firmware_ver = kstrdup(&buf[2], GFP_NOIO);
828 break;
829 case 0x84: /* device name */
830 if (!device_name)
831 device_name = kstrdup(&buf[2], GFP_NOIO);
832 break;
833 }
834 }
835
836 printk(KERN_INFO "Nexio device: %s, firmware version: %s\n",
837 device_name, firmware_ver);
838
839 kfree(firmware_ver);
840 kfree(device_name);
841
842 usb_fill_bulk_urb(priv->ack, dev, usb_sndbulkpipe(dev, output_ep),
843 priv->ack_buf, sizeof(nexio_ack_pkt),
844 nexio_ack_complete, usbtouch);
845 ret = 0;
846
847 out_buf:
848 kfree(buf);
849 return ret;
850 }
851
852 static void nexio_exit(struct usbtouch_usb *usbtouch)
853 {
854 struct nexio_priv *priv = usbtouch->priv;
855
856 usb_kill_urb(priv->ack);
857 usb_free_urb(priv->ack);
858 kfree(priv->ack_buf);
859 kfree(priv);
860 }
861
862 static int nexio_read_data(struct usbtouch_usb *usbtouch, unsigned char *pkt)
863 {
864 struct nexio_touch_packet *packet = (void *) pkt;
865 struct nexio_priv *priv = usbtouch->priv;
866 unsigned int data_len = be16_to_cpu(packet->data_len);
867 unsigned int x_len = be16_to_cpu(packet->x_len);
868 unsigned int y_len = be16_to_cpu(packet->y_len);
869 int x, y, begin_x, begin_y, end_x, end_y, w, h, ret;
870
871 /* got touch data? */
872 if ((pkt[0] & 0xe0) != 0xe0)
873 return 0;
874
875 if (data_len > 0xff)
876 data_len -= 0x100;
877 if (x_len > 0xff)
878 x_len -= 0x80;
879
880 /* send ACK */
881 ret = usb_submit_urb(priv->ack, GFP_ATOMIC);
882
883 if (!usbtouch->type->max_xc) {
884 usbtouch->type->max_xc = 2 * x_len;
885 input_set_abs_params(usbtouch->input, ABS_X,
886 0, usbtouch->type->max_xc, 0, 0);
887 usbtouch->type->max_yc = 2 * y_len;
888 input_set_abs_params(usbtouch->input, ABS_Y,
889 0, usbtouch->type->max_yc, 0, 0);
890 }
891 /*
892 * The device reports state of IR sensors on X and Y axes.
893 * Each byte represents "darkness" percentage (0-100) of one element.
894 * 17" touchscreen reports only 64 x 52 bytes so the resolution is low.
895 * This also means that there's a limited multi-touch capability but
896 * it's disabled (and untested) here as there's no X driver for that.
897 */
898 begin_x = end_x = begin_y = end_y = -1;
899 for (x = 0; x < x_len; x++) {
900 if (begin_x == -1 && packet->data[x] > NEXIO_THRESHOLD) {
901 begin_x = x;
902 continue;
903 }
904 if (end_x == -1 && begin_x != -1 && packet->data[x] < NEXIO_THRESHOLD) {
905 end_x = x - 1;
906 for (y = x_len; y < data_len; y++) {
907 if (begin_y == -1 && packet->data[y] > NEXIO_THRESHOLD) {
908 begin_y = y - x_len;
909 continue;
910 }
911 if (end_y == -1 &&
912 begin_y != -1 && packet->data[y] < NEXIO_THRESHOLD) {
913 end_y = y - 1 - x_len;
914 w = end_x - begin_x;
915 h = end_y - begin_y;
916 #if 0
917 /* multi-touch */
918 input_report_abs(usbtouch->input,
919 ABS_MT_TOUCH_MAJOR, max(w,h));
920 input_report_abs(usbtouch->input,
921 ABS_MT_TOUCH_MINOR, min(x,h));
922 input_report_abs(usbtouch->input,
923 ABS_MT_POSITION_X, 2*begin_x+w);
924 input_report_abs(usbtouch->input,
925 ABS_MT_POSITION_Y, 2*begin_y+h);
926 input_report_abs(usbtouch->input,
927 ABS_MT_ORIENTATION, w > h);
928 input_mt_sync(usbtouch->input);
929 #endif
930 /* single touch */
931 usbtouch->x = 2 * begin_x + w;
932 usbtouch->y = 2 * begin_y + h;
933 usbtouch->touch = packet->flags & 0x01;
934 begin_y = end_y = -1;
935 return 1;
936 }
937 }
938 begin_x = end_x = -1;
939 }
940
941 }
942 return 0;
943 }
944 #endif
945
946
947 /*****************************************************************************
948 * the different device descriptors
949 */
950 #ifdef MULTI_PACKET
951 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
952 unsigned char *pkt, int len);
953 #endif
954
955 static struct usbtouch_device_info usbtouch_dev_info[] = {
956 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
957 [DEVTYPE_EGALAX] = {
958 .min_xc = 0x0,
959 .max_xc = 0x07ff,
960 .min_yc = 0x0,
961 .max_yc = 0x07ff,
962 .rept_size = 16,
963 .process_pkt = usbtouch_process_multi,
964 .get_pkt_len = egalax_get_pkt_len,
965 .read_data = egalax_read_data,
966 },
967 #endif
968
969 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
970 [DEVTYPE_PANJIT] = {
971 .min_xc = 0x0,
972 .max_xc = 0x0fff,
973 .min_yc = 0x0,
974 .max_yc = 0x0fff,
975 .rept_size = 8,
976 .read_data = panjit_read_data,
977 },
978 #endif
979
980 #ifdef CONFIG_TOUCHSCREEN_USB_3M
981 [DEVTYPE_3M] = {
982 .min_xc = 0x0,
983 .max_xc = 0x4000,
984 .min_yc = 0x0,
985 .max_yc = 0x4000,
986 .rept_size = 11,
987 .read_data = mtouch_read_data,
988 .init = mtouch_init,
989 },
990 #endif
991
992 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
993 [DEVTYPE_ITM] = {
994 .min_xc = 0x0,
995 .max_xc = 0x0fff,
996 .min_yc = 0x0,
997 .max_yc = 0x0fff,
998 .max_press = 0xff,
999 .rept_size = 8,
1000 .read_data = itm_read_data,
1001 },
1002 #endif
1003
1004 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
1005 [DEVTYPE_ETURBO] = {
1006 .min_xc = 0x0,
1007 .max_xc = 0x07ff,
1008 .min_yc = 0x0,
1009 .max_yc = 0x07ff,
1010 .rept_size = 8,
1011 .process_pkt = usbtouch_process_multi,
1012 .get_pkt_len = eturbo_get_pkt_len,
1013 .read_data = eturbo_read_data,
1014 },
1015 #endif
1016
1017 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
1018 [DEVTYPE_GUNZE] = {
1019 .min_xc = 0x0,
1020 .max_xc = 0x0fff,
1021 .min_yc = 0x0,
1022 .max_yc = 0x0fff,
1023 .rept_size = 4,
1024 .read_data = gunze_read_data,
1025 },
1026 #endif
1027
1028 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
1029 [DEVTYPE_DMC_TSC10] = {
1030 .min_xc = 0x0,
1031 .max_xc = 0x03ff,
1032 .min_yc = 0x0,
1033 .max_yc = 0x03ff,
1034 .rept_size = 5,
1035 .init = dmc_tsc10_init,
1036 .read_data = dmc_tsc10_read_data,
1037 },
1038 #endif
1039
1040 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
1041 [DEVTYPE_IRTOUCH] = {
1042 .min_xc = 0x0,
1043 .max_xc = 0x0fff,
1044 .min_yc = 0x0,
1045 .max_yc = 0x0fff,
1046 .rept_size = 8,
1047 .read_data = irtouch_read_data,
1048 },
1049 #endif
1050
1051 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
1052 [DEVTYPE_IDEALTEK] = {
1053 .min_xc = 0x0,
1054 .max_xc = 0x0fff,
1055 .min_yc = 0x0,
1056 .max_yc = 0x0fff,
1057 .rept_size = 8,
1058 .process_pkt = usbtouch_process_multi,
1059 .get_pkt_len = idealtek_get_pkt_len,
1060 .read_data = idealtek_read_data,
1061 },
1062 #endif
1063
1064 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
1065 [DEVTYPE_GENERAL_TOUCH] = {
1066 .min_xc = 0x0,
1067 .max_xc = 0x7fff,
1068 .min_yc = 0x0,
1069 .max_yc = 0x7fff,
1070 .rept_size = 7,
1071 .read_data = general_touch_read_data,
1072 },
1073 #endif
1074
1075 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
1076 [DEVTYPE_GOTOP] = {
1077 .min_xc = 0x0,
1078 .max_xc = 0x03ff,
1079 .min_yc = 0x0,
1080 .max_yc = 0x03ff,
1081 .rept_size = 4,
1082 .read_data = gotop_read_data,
1083 },
1084 #endif
1085
1086 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
1087 [DEVTYPE_JASTEC] = {
1088 .min_xc = 0x0,
1089 .max_xc = 0x0fff,
1090 .min_yc = 0x0,
1091 .max_yc = 0x0fff,
1092 .rept_size = 4,
1093 .read_data = jastec_read_data,
1094 },
1095 #endif
1096
1097 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
1098 [DEVTYPE_E2I] = {
1099 .min_xc = 0x0,
1100 .max_xc = 0x7fff,
1101 .min_yc = 0x0,
1102 .max_yc = 0x7fff,
1103 .rept_size = 6,
1104 .init = e2i_init,
1105 .read_data = e2i_read_data,
1106 },
1107 #endif
1108
1109 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
1110 [DEVTYPE_ZYTRONIC] = {
1111 .min_xc = 0x0,
1112 .max_xc = 0x03ff,
1113 .min_yc = 0x0,
1114 .max_yc = 0x03ff,
1115 .rept_size = 5,
1116 .read_data = zytronic_read_data,
1117 .irq_always = true,
1118 },
1119 #endif
1120
1121 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
1122 [DEVTYPE_TC45USB] = {
1123 .min_xc = 0x0,
1124 .max_xc = 0x0fff,
1125 .min_yc = 0x0,
1126 .max_yc = 0x0fff,
1127 .rept_size = 5,
1128 .read_data = tc45usb_read_data,
1129 },
1130 #endif
1131
1132 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
1133 [DEVTYPE_NEXIO] = {
1134 .rept_size = 1024,
1135 .irq_always = true,
1136 .read_data = nexio_read_data,
1137 .alloc = nexio_alloc,
1138 .init = nexio_init,
1139 .exit = nexio_exit,
1140 },
1141 #endif
1142 };
1143
1144
1145 /*****************************************************************************
1146 * Generic Part
1147 */
1148 static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
1149 unsigned char *pkt, int len)
1150 {
1151 struct usbtouch_device_info *type = usbtouch->type;
1152
1153 if (!type->read_data(usbtouch, pkt))
1154 return;
1155
1156 input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch);
1157
1158 if (swap_xy) {
1159 input_report_abs(usbtouch->input, ABS_X, usbtouch->y);
1160 input_report_abs(usbtouch->input, ABS_Y, usbtouch->x);
1161 } else {
1162 input_report_abs(usbtouch->input, ABS_X, usbtouch->x);
1163 input_report_abs(usbtouch->input, ABS_Y, usbtouch->y);
1164 }
1165 if (type->max_press)
1166 input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press);
1167 input_sync(usbtouch->input);
1168 }
1169
1170
1171 #ifdef MULTI_PACKET
1172 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1173 unsigned char *pkt, int len)
1174 {
1175 unsigned char *buffer;
1176 int pkt_len, pos, buf_len, tmp;
1177
1178 /* process buffer */
1179 if (unlikely(usbtouch->buf_len)) {
1180 /* try to get size */
1181 pkt_len = usbtouch->type->get_pkt_len(
1182 usbtouch->buffer, usbtouch->buf_len);
1183
1184 /* drop? */
1185 if (unlikely(!pkt_len))
1186 goto out_flush_buf;
1187
1188 /* need to append -pkt_len bytes before able to get size */
1189 if (unlikely(pkt_len < 0)) {
1190 int append = -pkt_len;
1191 if (unlikely(append > len))
1192 append = len;
1193 if (usbtouch->buf_len + append >= usbtouch->type->rept_size)
1194 goto out_flush_buf;
1195 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append);
1196 usbtouch->buf_len += append;
1197
1198 pkt_len = usbtouch->type->get_pkt_len(
1199 usbtouch->buffer, usbtouch->buf_len);
1200 if (pkt_len < 0)
1201 return;
1202 }
1203
1204 /* append */
1205 tmp = pkt_len - usbtouch->buf_len;
1206 if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size)
1207 goto out_flush_buf;
1208 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp);
1209 usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len);
1210
1211 buffer = pkt + tmp;
1212 buf_len = len - tmp;
1213 } else {
1214 buffer = pkt;
1215 buf_len = len;
1216 }
1217
1218 /* loop over the received packet, process */
1219 pos = 0;
1220 while (pos < buf_len) {
1221 /* get packet len */
1222 pkt_len = usbtouch->type->get_pkt_len(buffer + pos,
1223 buf_len - pos);
1224
1225 /* unknown packet: skip one byte */
1226 if (unlikely(!pkt_len)) {
1227 pos++;
1228 continue;
1229 }
1230
1231 /* full packet: process */
1232 if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) {
1233 usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len);
1234 } else {
1235 /* incomplete packet: save in buffer */
1236 memcpy(usbtouch->buffer, buffer + pos, buf_len - pos);
1237 usbtouch->buf_len = buf_len - pos;
1238 return;
1239 }
1240 pos += pkt_len;
1241 }
1242
1243 out_flush_buf:
1244 usbtouch->buf_len = 0;
1245 return;
1246 }
1247 #endif
1248
1249
1250 static void usbtouch_irq(struct urb *urb)
1251 {
1252 struct usbtouch_usb *usbtouch = urb->context;
1253 int retval;
1254
1255 switch (urb->status) {
1256 case 0:
1257 /* success */
1258 break;
1259 case -ETIME:
1260 /* this urb is timing out */
1261 dbg("%s - urb timed out - was the device unplugged?",
1262 __func__);
1263 return;
1264 case -ECONNRESET:
1265 case -ENOENT:
1266 case -ESHUTDOWN:
1267 case -EPIPE:
1268 /* this urb is terminated, clean up */
1269 dbg("%s - urb shutting down with status: %d",
1270 __func__, urb->status);
1271 return;
1272 default:
1273 dbg("%s - nonzero urb status received: %d",
1274 __func__, urb->status);
1275 goto exit;
1276 }
1277
1278 usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length);
1279
1280 exit:
1281 usb_mark_last_busy(interface_to_usbdev(usbtouch->interface));
1282 retval = usb_submit_urb(urb, GFP_ATOMIC);
1283 if (retval)
1284 err("%s - usb_submit_urb failed with result: %d",
1285 __func__, retval);
1286 }
1287
1288 static int usbtouch_open(struct input_dev *input)
1289 {
1290 struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1291 int r;
1292
1293 usbtouch->irq->dev = interface_to_usbdev(usbtouch->interface);
1294
1295 r = usb_autopm_get_interface(usbtouch->interface) ? -EIO : 0;
1296 if (r < 0)
1297 goto out;
1298
1299 if (!usbtouch->type->irq_always) {
1300 if (usb_submit_urb(usbtouch->irq, GFP_KERNEL)) {
1301 r = -EIO;
1302 goto out_put;
1303 }
1304 }
1305
1306 usbtouch->interface->needs_remote_wakeup = 1;
1307 out_put:
1308 usb_autopm_put_interface(usbtouch->interface);
1309 out:
1310 return r;
1311 }
1312
1313 static void usbtouch_close(struct input_dev *input)
1314 {
1315 struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1316 int r;
1317
1318 if (!usbtouch->type->irq_always)
1319 usb_kill_urb(usbtouch->irq);
1320 r = usb_autopm_get_interface(usbtouch->interface);
1321 usbtouch->interface->needs_remote_wakeup = 0;
1322 if (!r)
1323 usb_autopm_put_interface(usbtouch->interface);
1324 }
1325
1326 static int usbtouch_suspend
1327 (struct usb_interface *intf, pm_message_t message)
1328 {
1329 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1330
1331 usb_kill_urb(usbtouch->irq);
1332
1333 return 0;
1334 }
1335
1336 static int usbtouch_resume(struct usb_interface *intf)
1337 {
1338 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1339 struct input_dev *input = usbtouch->input;
1340 int result = 0;
1341
1342 mutex_lock(&input->mutex);
1343 if (input->users || usbtouch->type->irq_always)
1344 result = usb_submit_urb(usbtouch->irq, GFP_NOIO);
1345 mutex_unlock(&input->mutex);
1346
1347 return result;
1348 }
1349
1350 static int usbtouch_reset_resume(struct usb_interface *intf)
1351 {
1352 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1353 struct input_dev *input = usbtouch->input;
1354 int err = 0;
1355
1356 /* reinit the device */
1357 if (usbtouch->type->init) {
1358 err = usbtouch->type->init(usbtouch);
1359 if (err) {
1360 dbg("%s - type->init() failed, err: %d",
1361 __func__, err);
1362 return err;
1363 }
1364 }
1365
1366 /* restart IO if needed */
1367 mutex_lock(&input->mutex);
1368 if (input->users)
1369 err = usb_submit_urb(usbtouch->irq, GFP_NOIO);
1370 mutex_unlock(&input->mutex);
1371
1372 return err;
1373 }
1374
1375 static void usbtouch_free_buffers(struct usb_device *udev,
1376 struct usbtouch_usb *usbtouch)
1377 {
1378 usb_free_coherent(udev, usbtouch->type->rept_size,
1379 usbtouch->data, usbtouch->data_dma);
1380 kfree(usbtouch->buffer);
1381 }
1382
1383 static struct usb_endpoint_descriptor *
1384 usbtouch_get_input_endpoint(struct usb_host_interface *interface)
1385 {
1386 int i;
1387
1388 for (i = 0; i < interface->desc.bNumEndpoints; i++)
1389 if (usb_endpoint_dir_in(&interface->endpoint[i].desc))
1390 return &interface->endpoint[i].desc;
1391
1392 return NULL;
1393 }
1394
1395 static int usbtouch_probe(struct usb_interface *intf,
1396 const struct usb_device_id *id)
1397 {
1398 struct usbtouch_usb *usbtouch;
1399 struct input_dev *input_dev;
1400 struct usb_endpoint_descriptor *endpoint;
1401 struct usb_device *udev = interface_to_usbdev(intf);
1402 struct usbtouch_device_info *type;
1403 int err = -ENOMEM;
1404
1405 /* some devices are ignored */
1406 if (id->driver_info == DEVTYPE_IGNORE)
1407 return -ENODEV;
1408
1409 endpoint = usbtouch_get_input_endpoint(intf->cur_altsetting);
1410 if (!endpoint)
1411 return -ENXIO;
1412
1413 usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL);
1414 input_dev = input_allocate_device();
1415 if (!usbtouch || !input_dev)
1416 goto out_free;
1417
1418 type = &usbtouch_dev_info[id->driver_info];
1419 usbtouch->type = type;
1420 if (!type->process_pkt)
1421 type->process_pkt = usbtouch_process_pkt;
1422
1423 usbtouch->data = usb_alloc_coherent(udev, type->rept_size,
1424 GFP_KERNEL, &usbtouch->data_dma);
1425 if (!usbtouch->data)
1426 goto out_free;
1427
1428 if (type->get_pkt_len) {
1429 usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL);
1430 if (!usbtouch->buffer)
1431 goto out_free_buffers;
1432 }
1433
1434 usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
1435 if (!usbtouch->irq) {
1436 dbg("%s - usb_alloc_urb failed: usbtouch->irq", __func__);
1437 goto out_free_buffers;
1438 }
1439
1440 usbtouch->interface = intf;
1441 usbtouch->input = input_dev;
1442
1443 if (udev->manufacturer)
1444 strlcpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name));
1445
1446 if (udev->product) {
1447 if (udev->manufacturer)
1448 strlcat(usbtouch->name, " ", sizeof(usbtouch->name));
1449 strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name));
1450 }
1451
1452 if (!strlen(usbtouch->name))
1453 snprintf(usbtouch->name, sizeof(usbtouch->name),
1454 "USB Touchscreen %04x:%04x",
1455 le16_to_cpu(udev->descriptor.idVendor),
1456 le16_to_cpu(udev->descriptor.idProduct));
1457
1458 usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys));
1459 strlcat(usbtouch->phys, "/input0", sizeof(usbtouch->phys));
1460
1461 input_dev->name = usbtouch->name;
1462 input_dev->phys = usbtouch->phys;
1463 usb_to_input_id(udev, &input_dev->id);
1464 input_dev->dev.parent = &intf->dev;
1465
1466 input_set_drvdata(input_dev, usbtouch);
1467
1468 input_dev->open = usbtouch_open;
1469 input_dev->close = usbtouch_close;
1470
1471 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
1472 input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
1473 input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0);
1474 input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0);
1475 if (type->max_press)
1476 input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press,
1477 type->max_press, 0, 0);
1478
1479 if (usb_endpoint_type(endpoint) == USB_ENDPOINT_XFER_INT)
1480 usb_fill_int_urb(usbtouch->irq, udev,
1481 usb_rcvintpipe(udev, endpoint->bEndpointAddress),
1482 usbtouch->data, type->rept_size,
1483 usbtouch_irq, usbtouch, endpoint->bInterval);
1484 else
1485 usb_fill_bulk_urb(usbtouch->irq, udev,
1486 usb_rcvbulkpipe(udev, endpoint->bEndpointAddress),
1487 usbtouch->data, type->rept_size,
1488 usbtouch_irq, usbtouch);
1489
1490 usbtouch->irq->dev = udev;
1491 usbtouch->irq->transfer_dma = usbtouch->data_dma;
1492 usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1493
1494 /* device specific allocations */
1495 if (type->alloc) {
1496 err = type->alloc(usbtouch);
1497 if (err) {
1498 dbg("%s - type->alloc() failed, err: %d", __func__, err);
1499 goto out_free_urb;
1500 }
1501 }
1502
1503 /* device specific initialisation*/
1504 if (type->init) {
1505 err = type->init(usbtouch);
1506 if (err) {
1507 dbg("%s - type->init() failed, err: %d", __func__, err);
1508 goto out_do_exit;
1509 }
1510 }
1511
1512 err = input_register_device(usbtouch->input);
1513 if (err) {
1514 dbg("%s - input_register_device failed, err: %d", __func__, err);
1515 goto out_do_exit;
1516 }
1517
1518 usb_set_intfdata(intf, usbtouch);
1519
1520 if (usbtouch->type->irq_always) {
1521 /* this can't fail */
1522 usb_autopm_get_interface(intf);
1523 err = usb_submit_urb(usbtouch->irq, GFP_KERNEL);
1524 if (err) {
1525 usb_autopm_put_interface(intf);
1526 err("%s - usb_submit_urb failed with result: %d",
1527 __func__, err);
1528 goto out_unregister_input;
1529 }
1530 }
1531
1532 return 0;
1533
1534 out_unregister_input:
1535 input_unregister_device(input_dev);
1536 input_dev = NULL;
1537 out_do_exit:
1538 if (type->exit)
1539 type->exit(usbtouch);
1540 out_free_urb:
1541 usb_free_urb(usbtouch->irq);
1542 out_free_buffers:
1543 usbtouch_free_buffers(udev, usbtouch);
1544 out_free:
1545 input_free_device(input_dev);
1546 kfree(usbtouch);
1547 return err;
1548 }
1549
1550 static void usbtouch_disconnect(struct usb_interface *intf)
1551 {
1552 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1553
1554 dbg("%s - called", __func__);
1555
1556 if (!usbtouch)
1557 return;
1558
1559 dbg("%s - usbtouch is initialized, cleaning up", __func__);
1560 usb_set_intfdata(intf, NULL);
1561 /* this will stop IO via close */
1562 input_unregister_device(usbtouch->input);
1563 usb_free_urb(usbtouch->irq);
1564 if (usbtouch->type->exit)
1565 usbtouch->type->exit(usbtouch);
1566 usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch);
1567 kfree(usbtouch);
1568 }
1569
1570 MODULE_DEVICE_TABLE(usb, usbtouch_devices);
1571
1572 static struct usb_driver usbtouch_driver = {
1573 .name = "usbtouchscreen",
1574 .probe = usbtouch_probe,
1575 .disconnect = usbtouch_disconnect,
1576 .suspend = usbtouch_suspend,
1577 .resume = usbtouch_resume,
1578 .reset_resume = usbtouch_reset_resume,
1579 .id_table = usbtouch_devices,
1580 .supports_autosuspend = 1,
1581 };
1582
1583 static int __init usbtouch_init(void)
1584 {
1585 return usb_register(&usbtouch_driver);
1586 }
1587
1588 static void __exit usbtouch_cleanup(void)
1589 {
1590 usb_deregister(&usbtouch_driver);
1591 }
1592
1593 module_init(usbtouch_init);
1594 module_exit(usbtouch_cleanup);
1595
1596 MODULE_AUTHOR(DRIVER_AUTHOR);
1597 MODULE_DESCRIPTION(DRIVER_DESC);
1598 MODULE_LICENSE("GPL");
1599
1600 MODULE_ALIAS("touchkitusb");
1601 MODULE_ALIAS("itmtouch");
1602 MODULE_ALIAS("mtouchusb");