projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
irq: Better struct irqaction layout
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / input / touchscreen / usbtouchscreen.c
1 /******************************************************************************
2 * usbtouchscreen.c
3 * Driver for USB Touchscreens, supporting those devices:
4 * - eGalax Touchkit
5 * includes eTurboTouch CT-410/510/700
6 * - 3M/Microtouch EX II series
7 * - ITM
8 * - PanJit TouchSet
9 * - eTurboTouch
10 * - Gunze AHL61
11 * - DMC TSC-10/25
12 * - IRTOUCHSYSTEMS/UNITOP
13 * - IdealTEK URTC1000
14 * - General Touch
15 * - GoTop Super_Q2/GogoPen/PenPower tablets
16 * - JASTEC USB touch controller/DigiTech DTR-02U
17 * - Zytronic capacitive touchscreen
18 * - NEXIO/iNexio
19 *
20 * Copyright (C) 2004-2007 by Daniel Ritz <daniel.ritz@gmx.ch>
21 * Copyright (C) by Todd E. Johnson (mtouchusb.c)
22 *
23 * This program is free software; you can redistribute it and/or
24 * modify it under the terms of the GNU General Public License as
25 * published by the Free Software Foundation; either version 2 of the
26 * License, or (at your option) any later version.
27 *
28 * This program is distributed in the hope that it will be useful, but
29 * WITHOUT ANY WARRANTY; without even the implied warranty of
30 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
31 * General Public License for more details.
32 *
33 * You should have received a copy of the GNU General Public License
34 * along with this program; if not, write to the Free Software
35 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
36 *
37 * Driver is based on touchkitusb.c
38 * - ITM parts are from itmtouch.c
39 * - 3M parts are from mtouchusb.c
40 * - PanJit parts are from an unmerged driver by Lanslott Gish
41 * - DMC TSC 10/25 are from Holger Schurig, with ideas from an unmerged
42 * driver from Marius Vollmer
43 *
44 *****************************************************************************/
45
46 //#define DEBUG
47
48 #include <linux/kernel.h>
49 #include <linux/slab.h>
50 #include <linux/input.h>
51 #include <linux/module.h>
52 #include <linux/init.h>
53 #include <linux/usb.h>
54 #include <linux/usb/input.h>
55 #include <linux/hid.h>
56
57
58 #define DRIVER_VERSION "v0.6"
59 #define DRIVER_AUTHOR "Daniel Ritz <daniel.ritz@gmx.ch>"
60 #define DRIVER_DESC "USB Touchscreen Driver"
61
62 static int swap_xy;
63 module_param(swap_xy, bool, 0644);
64 MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");
65
66 static int hwcalib_xy;
67 module_param(hwcalib_xy, bool, 0644);
68 MODULE_PARM_DESC(hwcalib_xy, "If set hw-calibrated X/Y are used if available");
69
70 /* device specifc data/functions */
71 struct usbtouch_usb;
72 struct usbtouch_device_info {
73 int min_xc, max_xc;
74 int min_yc, max_yc;
75 int min_press, max_press;
76 int rept_size;
77
78 /*
79 * Always service the USB devices irq not just when the input device is
80 * open. This is useful when devices have a watchdog which prevents us
81 * from periodically polling the device. Leave this unset unless your
82 * touchscreen device requires it, as it does consume more of the USB
83 * bandwidth.
84 */
85 bool irq_always;
86
87 void (*process_pkt) (struct usbtouch_usb *usbtouch, unsigned char *pkt, int len);
88
89 /*
90 * used to get the packet len. possible return values:
91 * > 0: packet len
92 * = 0: skip one byte
93 * < 0: -return value more bytes needed
94 */
95 int (*get_pkt_len) (unsigned char *pkt, int len);
96
97 int (*read_data) (struct usbtouch_usb *usbtouch, unsigned char *pkt);
98 int (*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 #endif
182
183 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
184 {USB_DEVICE(0x1234, 0x5678), .driver_info = DEVTYPE_ETURBO},
185 #endif
186
187 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
188 {USB_DEVICE(0x0637, 0x0001), .driver_info = DEVTYPE_GUNZE},
189 #endif
190
191 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
192 {USB_DEVICE(0x0afa, 0x03e8), .driver_info = DEVTYPE_DMC_TSC10},
193 #endif
194
195 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
196 {USB_DEVICE(0x595a, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
197 {USB_DEVICE(0x6615, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
198 #endif
199
200 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
201 {USB_DEVICE(0x1391, 0x1000), .driver_info = DEVTYPE_IDEALTEK},
202 #endif
203
204 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
205 {USB_DEVICE(0x0dfc, 0x0001), .driver_info = DEVTYPE_GENERAL_TOUCH},
206 #endif
207
208 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
209 {USB_DEVICE(0x08f2, 0x007f), .driver_info = DEVTYPE_GOTOP},
210 {USB_DEVICE(0x08f2, 0x00ce), .driver_info = DEVTYPE_GOTOP},
211 {USB_DEVICE(0x08f2, 0x00f4), .driver_info = DEVTYPE_GOTOP},
212 #endif
213
214 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
215 {USB_DEVICE(0x0f92, 0x0001), .driver_info = DEVTYPE_JASTEC},
216 #endif
217
218 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
219 {USB_DEVICE(0x1ac7, 0x0001), .driver_info = DEVTYPE_E2I},
220 #endif
221
222 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
223 {USB_DEVICE(0x14c8, 0x0003), .driver_info = DEVTYPE_ZYTRONIC},
224 #endif
225
226 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
227 /* TC5UH */
228 {USB_DEVICE(0x0664, 0x0309), .driver_info = DEVTYPE_TC45USB},
229 /* TC4UM */
230 {USB_DEVICE(0x0664, 0x0306), .driver_info = DEVTYPE_TC45USB},
231 #endif
232
233 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
234 /* data interface only */
235 {USB_DEVICE_AND_INTERFACE_INFO(0x10f0, 0x2002, 0x0a, 0x00, 0x00),
236 .driver_info = DEVTYPE_NEXIO},
237 {USB_DEVICE_AND_INTERFACE_INFO(0x1870, 0x0001, 0x0a, 0x00, 0x00),
238 .driver_info = DEVTYPE_NEXIO},
239 #endif
240
241 {}
242 };
243
244
245 /*****************************************************************************
246 * e2i Part
247 */
248
249 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
250 static int e2i_init(struct usbtouch_usb *usbtouch)
251 {
252 int ret;
253 struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
254
255 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
256 0x01, 0x02, 0x0000, 0x0081,
257 NULL, 0, USB_CTRL_SET_TIMEOUT);
258
259 dbg("%s - usb_control_msg - E2I_RESET - bytes|err: %d",
260 __func__, ret);
261 return ret;
262 }
263
264 static int e2i_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
265 {
266 int tmp = (pkt[0] << 8) | pkt[1];
267 dev->x = (pkt[2] << 8) | pkt[3];
268 dev->y = (pkt[4] << 8) | pkt[5];
269
270 tmp = tmp - 0xA000;
271 dev->touch = (tmp > 0);
272 dev->press = (tmp > 0 ? tmp : 0);
273
274 return 1;
275 }
276 #endif
277
278
279 /*****************************************************************************
280 * eGalax part
281 */
282
283 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
284
285 #ifndef MULTI_PACKET
286 #define MULTI_PACKET
287 #endif
288
289 #define EGALAX_PKT_TYPE_MASK 0xFE
290 #define EGALAX_PKT_TYPE_REPT 0x80
291 #define EGALAX_PKT_TYPE_DIAG 0x0A
292
293 static int egalax_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
294 {
295 if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT)
296 return 0;
297
298 dev->x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F);
299 dev->y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F);
300 dev->touch = pkt[0] & 0x01;
301
302 return 1;
303 }
304
305 static int egalax_get_pkt_len(unsigned char *buf, int len)
306 {
307 switch (buf[0] & EGALAX_PKT_TYPE_MASK) {
308 case EGALAX_PKT_TYPE_REPT:
309 return 5;
310
311 case EGALAX_PKT_TYPE_DIAG:
312 if (len < 2)
313 return -1;
314
315 return buf[1] + 2;
316 }
317
318 return 0;
319 }
320 #endif
321
322
323 /*****************************************************************************
324 * PanJit Part
325 */
326 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
327 static int panjit_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
328 {
329 dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
330 dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
331 dev->touch = pkt[0] & 0x01;
332
333 return 1;
334 }
335 #endif
336
337
338 /*****************************************************************************
339 * 3M/Microtouch Part
340 */
341 #ifdef CONFIG_TOUCHSCREEN_USB_3M
342
343 #define MTOUCHUSB_ASYNC_REPORT 1
344 #define MTOUCHUSB_RESET 7
345 #define MTOUCHUSB_REQ_CTRLLR_ID 10
346
347 static int mtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
348 {
349 if (hwcalib_xy) {
350 dev->x = (pkt[4] << 8) | pkt[3];
351 dev->y = 0xffff - ((pkt[6] << 8) | pkt[5]);
352 } else {
353 dev->x = (pkt[8] << 8) | pkt[7];
354 dev->y = (pkt[10] << 8) | pkt[9];
355 }
356 dev->touch = (pkt[2] & 0x40) ? 1 : 0;
357
358 return 1;
359 }
360
361 static int mtouch_init(struct usbtouch_usb *usbtouch)
362 {
363 int ret, i;
364 struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
365
366 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
367 MTOUCHUSB_RESET,
368 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
369 1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
370 dbg("%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d",
371 __func__, ret);
372 if (ret < 0)
373 return ret;
374 msleep(150);
375
376 for (i = 0; i < 3; i++) {
377 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
378 MTOUCHUSB_ASYNC_REPORT,
379 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
380 1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT);
381 dbg("%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d",
382 __func__, ret);
383 if (ret >= 0)
384 break;
385 if (ret != -EPIPE)
386 return ret;
387 }
388
389 /* Default min/max xy are the raw values, override if using hw-calib */
390 if (hwcalib_xy) {
391 input_set_abs_params(usbtouch->input, ABS_X, 0, 0xffff, 0, 0);
392 input_set_abs_params(usbtouch->input, ABS_Y, 0, 0xffff, 0, 0);
393 }
394
395 return 0;
396 }
397 #endif
398
399
400 /*****************************************************************************
401 * ITM Part
402 */
403 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
404 static int itm_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
405 {
406 int touch;
407 /*
408 * ITM devices report invalid x/y data if not touched.
409 * if the screen was touched before but is not touched any more
410 * report touch as 0 with the last valid x/y data once. then stop
411 * reporting data until touched again.
412 */
413 dev->press = ((pkt[2] & 0x01) << 7) | (pkt[5] & 0x7F);
414
415 touch = ~pkt[7] & 0x20;
416 if (!touch) {
417 if (dev->touch) {
418 dev->touch = 0;
419 return 1;
420 }
421
422 return 0;
423 }
424
425 dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F);
426 dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F);
427 dev->touch = touch;
428
429 return 1;
430 }
431 #endif
432
433
434 /*****************************************************************************
435 * eTurboTouch part
436 */
437 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
438 #ifndef MULTI_PACKET
439 #define MULTI_PACKET
440 #endif
441 static int eturbo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
442 {
443 unsigned int shift;
444
445 /* packets should start with sync */
446 if (!(pkt[0] & 0x80))
447 return 0;
448
449 shift = (6 - (pkt[0] & 0x03));
450 dev->x = ((pkt[3] << 7) | pkt[4]) >> shift;
451 dev->y = ((pkt[1] << 7) | pkt[2]) >> shift;
452 dev->touch = (pkt[0] & 0x10) ? 1 : 0;
453
454 return 1;
455 }
456
457 static int eturbo_get_pkt_len(unsigned char *buf, int len)
458 {
459 if (buf[0] & 0x80)
460 return 5;
461 if (buf[0] == 0x01)
462 return 3;
463 return 0;
464 }
465 #endif
466
467
468 /*****************************************************************************
469 * Gunze part
470 */
471 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
472 static int gunze_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
473 {
474 if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80))
475 return 0;
476
477 dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F);
478 dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F);
479 dev->touch = pkt[0] & 0x20;
480
481 return 1;
482 }
483 #endif
484
485 /*****************************************************************************
486 * DMC TSC-10/25 Part
487 *
488 * Documentation about the controller and it's protocol can be found at
489 * http://www.dmccoltd.com/files/controler/tsc10usb_pi_e.pdf
490 * http://www.dmccoltd.com/files/controler/tsc25_usb_e.pdf
491 */
492 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
493
494 /* supported data rates. currently using 130 */
495 #define TSC10_RATE_POINT 0x50
496 #define TSC10_RATE_30 0x40
497 #define TSC10_RATE_50 0x41
498 #define TSC10_RATE_80 0x42
499 #define TSC10_RATE_100 0x43
500 #define TSC10_RATE_130 0x44
501 #define TSC10_RATE_150 0x45
502
503 /* commands */
504 #define TSC10_CMD_RESET 0x55
505 #define TSC10_CMD_RATE 0x05
506 #define TSC10_CMD_DATA1 0x01
507
508 static int dmc_tsc10_init(struct usbtouch_usb *usbtouch)
509 {
510 struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
511 int ret = -ENOMEM;
512 unsigned char *buf;
513
514 buf = kmalloc(2, GFP_NOIO);
515 if (!buf)
516 goto err_nobuf;
517 /* reset */
518 buf[0] = buf[1] = 0xFF;
519 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
520 TSC10_CMD_RESET,
521 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
522 0, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
523 if (ret < 0)
524 goto err_out;
525 if (buf[0] != 0x06) {
526 ret = -ENODEV;
527 goto err_out;
528 }
529
530 /* set coordinate output rate */
531 buf[0] = buf[1] = 0xFF;
532 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
533 TSC10_CMD_RATE,
534 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
535 TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
536 if (ret < 0)
537 goto err_out;
538 if ((buf[0] != 0x06) && (buf[0] != 0x15 || buf[1] != 0x01)) {
539 ret = -ENODEV;
540 goto err_out;
541 }
542
543 /* start sending data */
544 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
545 TSC10_CMD_DATA1,
546 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
547 0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
548 err_out:
549 kfree(buf);
550 err_nobuf:
551 return ret;
552 }
553
554
555 static int dmc_tsc10_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
556 {
557 dev->x = ((pkt[2] & 0x03) << 8) | pkt[1];
558 dev->y = ((pkt[4] & 0x03) << 8) | pkt[3];
559 dev->touch = pkt[0] & 0x01;
560
561 return 1;
562 }
563 #endif
564
565
566 /*****************************************************************************
567 * IRTOUCH Part
568 */
569 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
570 static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
571 {
572 dev->x = (pkt[3] << 8) | pkt[2];
573 dev->y = (pkt[5] << 8) | pkt[4];
574 dev->touch = (pkt[1] & 0x03) ? 1 : 0;
575
576 return 1;
577 }
578 #endif
579
580 /*****************************************************************************
581 * ET&T TC5UH/TC4UM part
582 */
583 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
584 static int tc45usb_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
585 {
586 dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
587 dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
588 dev->touch = pkt[0] & 0x01;
589
590 return 1;
591 }
592 #endif
593
594 /*****************************************************************************
595 * IdealTEK URTC1000 Part
596 */
597 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
598 #ifndef MULTI_PACKET
599 #define MULTI_PACKET
600 #endif
601 static int idealtek_get_pkt_len(unsigned char *buf, int len)
602 {
603 if (buf[0] & 0x80)
604 return 5;
605 if (buf[0] == 0x01)
606 return len;
607 return 0;
608 }
609
610 static int idealtek_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
611 {
612 switch (pkt[0] & 0x98) {
613 case 0x88:
614 /* touch data in IdealTEK mode */
615 dev->x = (pkt[1] << 5) | (pkt[2] >> 2);
616 dev->y = (pkt[3] << 5) | (pkt[4] >> 2);
617 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
618 return 1;
619
620 case 0x98:
621 /* touch data in MT emulation mode */
622 dev->x = (pkt[2] << 5) | (pkt[1] >> 2);
623 dev->y = (pkt[4] << 5) | (pkt[3] >> 2);
624 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
625 return 1;
626
627 default:
628 return 0;
629 }
630 }
631 #endif
632
633 /*****************************************************************************
634 * General Touch Part
635 */
636 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
637 static int general_touch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
638 {
639 dev->x = (pkt[2] << 8) | pkt[1];
640 dev->y = (pkt[4] << 8) | pkt[3];
641 dev->press = pkt[5] & 0xff;
642 dev->touch = pkt[0] & 0x01;
643
644 return 1;
645 }
646 #endif
647
648 /*****************************************************************************
649 * GoTop Part
650 */
651 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
652 static int gotop_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
653 {
654 dev->x = ((pkt[1] & 0x38) << 4) | pkt[2];
655 dev->y = ((pkt[1] & 0x07) << 7) | pkt[3];
656 dev->touch = pkt[0] & 0x01;
657
658 return 1;
659 }
660 #endif
661
662 /*****************************************************************************
663 * JASTEC Part
664 */
665 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
666 static int jastec_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
667 {
668 dev->x = ((pkt[0] & 0x3f) << 6) | (pkt[2] & 0x3f);
669 dev->y = ((pkt[1] & 0x3f) << 6) | (pkt[3] & 0x3f);
670 dev->touch = (pkt[0] & 0x40) >> 6;
671
672 return 1;
673 }
674 #endif
675
676 /*****************************************************************************
677 * Zytronic Part
678 */
679 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
680 static int zytronic_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
681 {
682 switch (pkt[0]) {
683 case 0x3A: /* command response */
684 dbg("%s: Command response %d", __func__, pkt[1]);
685 break;
686
687 case 0xC0: /* down */
688 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
689 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
690 dev->touch = 1;
691 dbg("%s: down %d,%d", __func__, dev->x, dev->y);
692 return 1;
693
694 case 0x80: /* up */
695 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
696 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
697 dev->touch = 0;
698 dbg("%s: up %d,%d", __func__, dev->x, dev->y);
699 return 1;
700
701 default:
702 dbg("%s: Unknown return %d", __func__, pkt[0]);
703 break;
704 }
705
706 return 0;
707 }
708 #endif
709
710 /*****************************************************************************
711 * NEXIO Part
712 */
713 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
714
715 #define NEXIO_TIMEOUT 5000
716 #define NEXIO_BUFSIZE 1024
717 #define NEXIO_THRESHOLD 50
718
719 struct nexio_priv {
720 struct urb *ack;
721 unsigned char *ack_buf;
722 };
723
724 struct nexio_touch_packet {
725 u8 flags; /* 0xe1 = touch, 0xe1 = release */
726 __be16 data_len; /* total bytes of touch data */
727 __be16 x_len; /* bytes for X axis */
728 __be16 y_len; /* bytes for Y axis */
729 u8 data[];
730 } __attribute__ ((packed));
731
732 static unsigned char nexio_ack_pkt[2] = { 0xaa, 0x02 };
733 static unsigned char nexio_init_pkt[4] = { 0x82, 0x04, 0x0a, 0x0f };
734
735 static void nexio_ack_complete(struct urb *urb)
736 {
737 }
738
739 static int nexio_alloc(struct usbtouch_usb *usbtouch)
740 {
741 struct nexio_priv *priv;
742 int ret = -ENOMEM;
743
744 usbtouch->priv = kmalloc(sizeof(struct nexio_priv), GFP_KERNEL);
745 if (!usbtouch->priv)
746 goto out_buf;
747
748 priv = usbtouch->priv;
749
750 priv->ack_buf = kmemdup(nexio_ack_pkt, sizeof(nexio_ack_pkt),
751 GFP_KERNEL);
752 if (!priv->ack_buf)
753 goto err_priv;
754
755 priv->ack = usb_alloc_urb(0, GFP_KERNEL);
756 if (!priv->ack) {
757 dbg("%s - usb_alloc_urb failed: usbtouch->ack", __func__);
758 goto err_ack_buf;
759 }
760
761 return 0;
762
763 err_ack_buf:
764 kfree(priv->ack_buf);
765 err_priv:
766 kfree(priv);
767 out_buf:
768 return ret;
769 }
770
771 static int nexio_init(struct usbtouch_usb *usbtouch)
772 {
773 struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
774 struct usb_host_interface *interface = usbtouch->interface->cur_altsetting;
775 struct nexio_priv *priv = usbtouch->priv;
776 int ret = -ENOMEM;
777 int actual_len, i;
778 unsigned char *buf;
779 char *firmware_ver = NULL, *device_name = NULL;
780 int input_ep = 0, output_ep = 0;
781
782 /* find first input and output endpoint */
783 for (i = 0; i < interface->desc.bNumEndpoints; i++) {
784 if (!input_ep &&
785 usb_endpoint_dir_in(&interface->endpoint[i].desc))
786 input_ep = interface->endpoint[i].desc.bEndpointAddress;
787 if (!output_ep &&
788 usb_endpoint_dir_out(&interface->endpoint[i].desc))
789 output_ep = interface->endpoint[i].desc.bEndpointAddress;
790 }
791 if (!input_ep || !output_ep)
792 return -ENXIO;
793
794 buf = kmalloc(NEXIO_BUFSIZE, GFP_NOIO);
795 if (!buf)
796 goto out_buf;
797
798 /* two empty reads */
799 for (i = 0; i < 2; i++) {
800 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
801 buf, NEXIO_BUFSIZE, &actual_len,
802 NEXIO_TIMEOUT);
803 if (ret < 0)
804 goto out_buf;
805 }
806
807 /* send init command */
808 memcpy(buf, nexio_init_pkt, sizeof(nexio_init_pkt));
809 ret = usb_bulk_msg(dev, usb_sndbulkpipe(dev, output_ep),
810 buf, sizeof(nexio_init_pkt), &actual_len,
811 NEXIO_TIMEOUT);
812 if (ret < 0)
813 goto out_buf;
814
815 /* read replies */
816 for (i = 0; i < 3; i++) {
817 memset(buf, 0, NEXIO_BUFSIZE);
818 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
819 buf, NEXIO_BUFSIZE, &actual_len,
820 NEXIO_TIMEOUT);
821 if (ret < 0 || actual_len < 1 || buf[1] != actual_len)
822 continue;
823 switch (buf[0]) {
824 case 0x83: /* firmware version */
825 if (!firmware_ver)
826 firmware_ver = kstrdup(&buf[2], GFP_NOIO);
827 break;
828 case 0x84: /* device name */
829 if (!device_name)
830 device_name = kstrdup(&buf[2], GFP_NOIO);
831 break;
832 }
833 }
834
835 printk(KERN_INFO "Nexio device: %s, firmware version: %s\n",
836 device_name, firmware_ver);
837
838 kfree(firmware_ver);
839 kfree(device_name);
840
841 usb_fill_bulk_urb(priv->ack, dev, usb_sndbulkpipe(dev, output_ep),
842 priv->ack_buf, sizeof(nexio_ack_pkt),
843 nexio_ack_complete, usbtouch);
844 ret = 0;
845
846 out_buf:
847 kfree(buf);
848 return ret;
849 }
850
851 static void nexio_exit(struct usbtouch_usb *usbtouch)
852 {
853 struct nexio_priv *priv = usbtouch->priv;
854
855 usb_kill_urb(priv->ack);
856 usb_free_urb(priv->ack);
857 kfree(priv->ack_buf);
858 kfree(priv);
859 }
860
861 static int nexio_read_data(struct usbtouch_usb *usbtouch, unsigned char *pkt)
862 {
863 struct nexio_touch_packet *packet = (void *) pkt;
864 struct nexio_priv *priv = usbtouch->priv;
865 unsigned int data_len = be16_to_cpu(packet->data_len);
866 unsigned int x_len = be16_to_cpu(packet->x_len);
867 unsigned int y_len = be16_to_cpu(packet->y_len);
868 int x, y, begin_x, begin_y, end_x, end_y, w, h, ret;
869
870 /* got touch data? */
871 if ((pkt[0] & 0xe0) != 0xe0)
872 return 0;
873
874 if (data_len > 0xff)
875 data_len -= 0x100;
876 if (x_len > 0xff)
877 x_len -= 0x80;
878
879 /* send ACK */
880 ret = usb_submit_urb(priv->ack, GFP_ATOMIC);
881
882 if (!usbtouch->type->max_xc) {
883 usbtouch->type->max_xc = 2 * x_len;
884 input_set_abs_params(usbtouch->input, ABS_X,
885 0, usbtouch->type->max_xc, 0, 0);
886 usbtouch->type->max_yc = 2 * y_len;
887 input_set_abs_params(usbtouch->input, ABS_Y,
888 0, usbtouch->type->max_yc, 0, 0);
889 }
890 /*
891 * The device reports state of IR sensors on X and Y axes.
892 * Each byte represents "darkness" percentage (0-100) of one element.
893 * 17" touchscreen reports only 64 x 52 bytes so the resolution is low.
894 * This also means that there's a limited multi-touch capability but
895 * it's disabled (and untested) here as there's no X driver for that.
896 */
897 begin_x = end_x = begin_y = end_y = -1;
898 for (x = 0; x < x_len; x++) {
899 if (begin_x == -1 && packet->data[x] > NEXIO_THRESHOLD) {
900 begin_x = x;
901 continue;
902 }
903 if (end_x == -1 && begin_x != -1 && packet->data[x] < NEXIO_THRESHOLD) {
904 end_x = x - 1;
905 for (y = x_len; y < data_len; y++) {
906 if (begin_y == -1 && packet->data[y] > NEXIO_THRESHOLD) {
907 begin_y = y - x_len;
908 continue;
909 }
910 if (end_y == -1 &&
911 begin_y != -1 && packet->data[y] < NEXIO_THRESHOLD) {
912 end_y = y - 1 - x_len;
913 w = end_x - begin_x;
914 h = end_y - begin_y;
915 #if 0
916 /* multi-touch */
917 input_report_abs(usbtouch->input,
918 ABS_MT_TOUCH_MAJOR, max(w,h));
919 input_report_abs(usbtouch->input,
920 ABS_MT_TOUCH_MINOR, min(x,h));
921 input_report_abs(usbtouch->input,
922 ABS_MT_POSITION_X, 2*begin_x+w);
923 input_report_abs(usbtouch->input,
924 ABS_MT_POSITION_Y, 2*begin_y+h);
925 input_report_abs(usbtouch->input,
926 ABS_MT_ORIENTATION, w > h);
927 input_mt_sync(usbtouch->input);
928 #endif
929 /* single touch */
930 usbtouch->x = 2 * begin_x + w;
931 usbtouch->y = 2 * begin_y + h;
932 usbtouch->touch = packet->flags & 0x01;
933 begin_y = end_y = -1;
934 return 1;
935 }
936 }
937 begin_x = end_x = -1;
938 }
939
940 }
941 return 0;
942 }
943 #endif
944
945
946 /*****************************************************************************
947 * the different device descriptors
948 */
949 #ifdef MULTI_PACKET
950 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
951 unsigned char *pkt, int len);
952 #endif
953
954 static struct usbtouch_device_info usbtouch_dev_info[] = {
955 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
956 [DEVTYPE_EGALAX] = {
957 .min_xc = 0x0,
958 .max_xc = 0x07ff,
959 .min_yc = 0x0,
960 .max_yc = 0x07ff,
961 .rept_size = 16,
962 .process_pkt = usbtouch_process_multi,
963 .get_pkt_len = egalax_get_pkt_len,
964 .read_data = egalax_read_data,
965 },
966 #endif
967
968 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
969 [DEVTYPE_PANJIT] = {
970 .min_xc = 0x0,
971 .max_xc = 0x0fff,
972 .min_yc = 0x0,
973 .max_yc = 0x0fff,
974 .rept_size = 8,
975 .read_data = panjit_read_data,
976 },
977 #endif
978
979 #ifdef CONFIG_TOUCHSCREEN_USB_3M
980 [DEVTYPE_3M] = {
981 .min_xc = 0x0,
982 .max_xc = 0x4000,
983 .min_yc = 0x0,
984 .max_yc = 0x4000,
985 .rept_size = 11,
986 .read_data = mtouch_read_data,
987 .init = mtouch_init,
988 },
989 #endif
990
991 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
992 [DEVTYPE_ITM] = {
993 .min_xc = 0x0,
994 .max_xc = 0x0fff,
995 .min_yc = 0x0,
996 .max_yc = 0x0fff,
997 .max_press = 0xff,
998 .rept_size = 8,
999 .read_data = itm_read_data,
1000 },
1001 #endif
1002
1003 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
1004 [DEVTYPE_ETURBO] = {
1005 .min_xc = 0x0,
1006 .max_xc = 0x07ff,
1007 .min_yc = 0x0,
1008 .max_yc = 0x07ff,
1009 .rept_size = 8,
1010 .process_pkt = usbtouch_process_multi,
1011 .get_pkt_len = eturbo_get_pkt_len,
1012 .read_data = eturbo_read_data,
1013 },
1014 #endif
1015
1016 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
1017 [DEVTYPE_GUNZE] = {
1018 .min_xc = 0x0,
1019 .max_xc = 0x0fff,
1020 .min_yc = 0x0,
1021 .max_yc = 0x0fff,
1022 .rept_size = 4,
1023 .read_data = gunze_read_data,
1024 },
1025 #endif
1026
1027 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
1028 [DEVTYPE_DMC_TSC10] = {
1029 .min_xc = 0x0,
1030 .max_xc = 0x03ff,
1031 .min_yc = 0x0,
1032 .max_yc = 0x03ff,
1033 .rept_size = 5,
1034 .init = dmc_tsc10_init,
1035 .read_data = dmc_tsc10_read_data,
1036 },
1037 #endif
1038
1039 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
1040 [DEVTYPE_IRTOUCH] = {
1041 .min_xc = 0x0,
1042 .max_xc = 0x0fff,
1043 .min_yc = 0x0,
1044 .max_yc = 0x0fff,
1045 .rept_size = 8,
1046 .read_data = irtouch_read_data,
1047 },
1048 #endif
1049
1050 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
1051 [DEVTYPE_IDEALTEK] = {
1052 .min_xc = 0x0,
1053 .max_xc = 0x0fff,
1054 .min_yc = 0x0,
1055 .max_yc = 0x0fff,
1056 .rept_size = 8,
1057 .process_pkt = usbtouch_process_multi,
1058 .get_pkt_len = idealtek_get_pkt_len,
1059 .read_data = idealtek_read_data,
1060 },
1061 #endif
1062
1063 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
1064 [DEVTYPE_GENERAL_TOUCH] = {
1065 .min_xc = 0x0,
1066 .max_xc = 0x7fff,
1067 .min_yc = 0x0,
1068 .max_yc = 0x7fff,
1069 .rept_size = 7,
1070 .read_data = general_touch_read_data,
1071 },
1072 #endif
1073
1074 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
1075 [DEVTYPE_GOTOP] = {
1076 .min_xc = 0x0,
1077 .max_xc = 0x03ff,
1078 .min_yc = 0x0,
1079 .max_yc = 0x03ff,
1080 .rept_size = 4,
1081 .read_data = gotop_read_data,
1082 },
1083 #endif
1084
1085 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
1086 [DEVTYPE_JASTEC] = {
1087 .min_xc = 0x0,
1088 .max_xc = 0x0fff,
1089 .min_yc = 0x0,
1090 .max_yc = 0x0fff,
1091 .rept_size = 4,
1092 .read_data = jastec_read_data,
1093 },
1094 #endif
1095
1096 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
1097 [DEVTYPE_E2I] = {
1098 .min_xc = 0x0,
1099 .max_xc = 0x7fff,
1100 .min_yc = 0x0,
1101 .max_yc = 0x7fff,
1102 .rept_size = 6,
1103 .init = e2i_init,
1104 .read_data = e2i_read_data,
1105 },
1106 #endif
1107
1108 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
1109 [DEVTYPE_ZYTRONIC] = {
1110 .min_xc = 0x0,
1111 .max_xc = 0x03ff,
1112 .min_yc = 0x0,
1113 .max_yc = 0x03ff,
1114 .rept_size = 5,
1115 .read_data = zytronic_read_data,
1116 .irq_always = true,
1117 },
1118 #endif
1119
1120 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
1121 [DEVTYPE_TC45USB] = {
1122 .min_xc = 0x0,
1123 .max_xc = 0x0fff,
1124 .min_yc = 0x0,
1125 .max_yc = 0x0fff,
1126 .rept_size = 5,
1127 .read_data = tc45usb_read_data,
1128 },
1129 #endif
1130
1131 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
1132 [DEVTYPE_NEXIO] = {
1133 .rept_size = 1024,
1134 .irq_always = true,
1135 .read_data = nexio_read_data,
1136 .alloc = nexio_alloc,
1137 .init = nexio_init,
1138 .exit = nexio_exit,
1139 },
1140 #endif
1141 };
1142
1143
1144 /*****************************************************************************
1145 * Generic Part
1146 */
1147 static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
1148 unsigned char *pkt, int len)
1149 {
1150 struct usbtouch_device_info *type = usbtouch->type;
1151
1152 if (!type->read_data(usbtouch, pkt))
1153 return;
1154
1155 input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch);
1156
1157 if (swap_xy) {
1158 input_report_abs(usbtouch->input, ABS_X, usbtouch->y);
1159 input_report_abs(usbtouch->input, ABS_Y, usbtouch->x);
1160 } else {
1161 input_report_abs(usbtouch->input, ABS_X, usbtouch->x);
1162 input_report_abs(usbtouch->input, ABS_Y, usbtouch->y);
1163 }
1164 if (type->max_press)
1165 input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press);
1166 input_sync(usbtouch->input);
1167 }
1168
1169
1170 #ifdef MULTI_PACKET
1171 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1172 unsigned char *pkt, int len)
1173 {
1174 unsigned char *buffer;
1175 int pkt_len, pos, buf_len, tmp;
1176
1177 /* process buffer */
1178 if (unlikely(usbtouch->buf_len)) {
1179 /* try to get size */
1180 pkt_len = usbtouch->type->get_pkt_len(
1181 usbtouch->buffer, usbtouch->buf_len);
1182
1183 /* drop? */
1184 if (unlikely(!pkt_len))
1185 goto out_flush_buf;
1186
1187 /* need to append -pkt_len bytes before able to get size */
1188 if (unlikely(pkt_len < 0)) {
1189 int append = -pkt_len;
1190 if (unlikely(append > len))
1191 append = len;
1192 if (usbtouch->buf_len + append >= usbtouch->type->rept_size)
1193 goto out_flush_buf;
1194 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append);
1195 usbtouch->buf_len += append;
1196
1197 pkt_len = usbtouch->type->get_pkt_len(
1198 usbtouch->buffer, usbtouch->buf_len);
1199 if (pkt_len < 0)
1200 return;
1201 }
1202
1203 /* append */
1204 tmp = pkt_len - usbtouch->buf_len;
1205 if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size)
1206 goto out_flush_buf;
1207 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp);
1208 usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len);
1209
1210 buffer = pkt + tmp;
1211 buf_len = len - tmp;
1212 } else {
1213 buffer = pkt;
1214 buf_len = len;
1215 }
1216
1217 /* loop over the received packet, process */
1218 pos = 0;
1219 while (pos < buf_len) {
1220 /* get packet len */
1221 pkt_len = usbtouch->type->get_pkt_len(buffer + pos,
1222 buf_len - pos);
1223
1224 /* unknown packet: skip one byte */
1225 if (unlikely(!pkt_len)) {
1226 pos++;
1227 continue;
1228 }
1229
1230 /* full packet: process */
1231 if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) {
1232 usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len);
1233 } else {
1234 /* incomplete packet: save in buffer */
1235 memcpy(usbtouch->buffer, buffer + pos, buf_len - pos);
1236 usbtouch->buf_len = buf_len - pos;
1237 return;
1238 }
1239 pos += pkt_len;
1240 }
1241
1242 out_flush_buf:
1243 usbtouch->buf_len = 0;
1244 return;
1245 }
1246 #endif
1247
1248
1249 static void usbtouch_irq(struct urb *urb)
1250 {
1251 struct usbtouch_usb *usbtouch = urb->context;
1252 int retval;
1253
1254 switch (urb->status) {
1255 case 0:
1256 /* success */
1257 break;
1258 case -ETIME:
1259 /* this urb is timing out */
1260 dbg("%s - urb timed out - was the device unplugged?",
1261 __func__);
1262 return;
1263 case -ECONNRESET:
1264 case -ENOENT:
1265 case -ESHUTDOWN:
1266 case -EPIPE:
1267 /* this urb is terminated, clean up */
1268 dbg("%s - urb shutting down with status: %d",
1269 __func__, urb->status);
1270 return;
1271 default:
1272 dbg("%s - nonzero urb status received: %d",
1273 __func__, urb->status);
1274 goto exit;
1275 }
1276
1277 usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length);
1278
1279 exit:
1280 usb_mark_last_busy(interface_to_usbdev(usbtouch->interface));
1281 retval = usb_submit_urb(urb, GFP_ATOMIC);
1282 if (retval)
1283 err("%s - usb_submit_urb failed with result: %d",
1284 __func__, retval);
1285 }
1286
1287 static int usbtouch_open(struct input_dev *input)
1288 {
1289 struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1290 int r;
1291
1292 usbtouch->irq->dev = interface_to_usbdev(usbtouch->interface);
1293
1294 r = usb_autopm_get_interface(usbtouch->interface) ? -EIO : 0;
1295 if (r < 0)
1296 goto out;
1297
1298 if (!usbtouch->type->irq_always) {
1299 if (usb_submit_urb(usbtouch->irq, GFP_KERNEL)) {
1300 r = -EIO;
1301 goto out_put;
1302 }
1303 }
1304
1305 usbtouch->interface->needs_remote_wakeup = 1;
1306 out_put:
1307 usb_autopm_put_interface(usbtouch->interface);
1308 out:
1309 return r;
1310 }
1311
1312 static void usbtouch_close(struct input_dev *input)
1313 {
1314 struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1315 int r;
1316
1317 if (!usbtouch->type->irq_always)
1318 usb_kill_urb(usbtouch->irq);
1319 r = usb_autopm_get_interface(usbtouch->interface);
1320 usbtouch->interface->needs_remote_wakeup = 0;
1321 if (!r)
1322 usb_autopm_put_interface(usbtouch->interface);
1323 }
1324
1325 static int usbtouch_suspend
1326 (struct usb_interface *intf, pm_message_t message)
1327 {
1328 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1329
1330 usb_kill_urb(usbtouch->irq);
1331
1332 return 0;
1333 }
1334
1335 static int usbtouch_resume(struct usb_interface *intf)
1336 {
1337 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1338 struct input_dev *input = usbtouch->input;
1339 int result = 0;
1340
1341 mutex_lock(&input->mutex);
1342 if (input->users || usbtouch->type->irq_always)
1343 result = usb_submit_urb(usbtouch->irq, GFP_NOIO);
1344 mutex_unlock(&input->mutex);
1345
1346 return result;
1347 }
1348
1349 static int usbtouch_reset_resume(struct usb_interface *intf)
1350 {
1351 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1352 struct input_dev *input = usbtouch->input;
1353 int err = 0;
1354
1355 /* reinit the device */
1356 if (usbtouch->type->init) {
1357 err = usbtouch->type->init(usbtouch);
1358 if (err) {
1359 dbg("%s - type->init() failed, err: %d",
1360 __func__, err);
1361 return err;
1362 }
1363 }
1364
1365 /* restart IO if needed */
1366 mutex_lock(&input->mutex);
1367 if (input->users)
1368 err = usb_submit_urb(usbtouch->irq, GFP_NOIO);
1369 mutex_unlock(&input->mutex);
1370
1371 return err;
1372 }
1373
1374 static void usbtouch_free_buffers(struct usb_device *udev,
1375 struct usbtouch_usb *usbtouch)
1376 {
1377 usb_free_coherent(udev, usbtouch->type->rept_size,
1378 usbtouch->data, usbtouch->data_dma);
1379 kfree(usbtouch->buffer);
1380 }
1381
1382 static struct usb_endpoint_descriptor *
1383 usbtouch_get_input_endpoint(struct usb_host_interface *interface)
1384 {
1385 int i;
1386
1387 for (i = 0; i < interface->desc.bNumEndpoints; i++)
1388 if (usb_endpoint_dir_in(&interface->endpoint[i].desc))
1389 return &interface->endpoint[i].desc;
1390
1391 return NULL;
1392 }
1393
1394 static int usbtouch_probe(struct usb_interface *intf,
1395 const struct usb_device_id *id)
1396 {
1397 struct usbtouch_usb *usbtouch;
1398 struct input_dev *input_dev;
1399 struct usb_endpoint_descriptor *endpoint;
1400 struct usb_device *udev = interface_to_usbdev(intf);
1401 struct usbtouch_device_info *type;
1402 int err = -ENOMEM;
1403
1404 /* some devices are ignored */
1405 if (id->driver_info == DEVTYPE_IGNORE)
1406 return -ENODEV;
1407
1408 endpoint = usbtouch_get_input_endpoint(intf->cur_altsetting);
1409 if (!endpoint)
1410 return -ENXIO;
1411
1412 usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL);
1413 input_dev = input_allocate_device();
1414 if (!usbtouch || !input_dev)
1415 goto out_free;
1416
1417 type = &usbtouch_dev_info[id->driver_info];
1418 usbtouch->type = type;
1419 if (!type->process_pkt)
1420 type->process_pkt = usbtouch_process_pkt;
1421
1422 usbtouch->data = usb_alloc_coherent(udev, type->rept_size,
1423 GFP_KERNEL, &usbtouch->data_dma);
1424 if (!usbtouch->data)
1425 goto out_free;
1426
1427 if (type->get_pkt_len) {
1428 usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL);
1429 if (!usbtouch->buffer)
1430 goto out_free_buffers;
1431 }
1432
1433 usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
1434 if (!usbtouch->irq) {
1435 dbg("%s - usb_alloc_urb failed: usbtouch->irq", __func__);
1436 goto out_free_buffers;
1437 }
1438
1439 usbtouch->interface = intf;
1440 usbtouch->input = input_dev;
1441
1442 if (udev->manufacturer)
1443 strlcpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name));
1444
1445 if (udev->product) {
1446 if (udev->manufacturer)
1447 strlcat(usbtouch->name, " ", sizeof(usbtouch->name));
1448 strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name));
1449 }
1450
1451 if (!strlen(usbtouch->name))
1452 snprintf(usbtouch->name, sizeof(usbtouch->name),
1453 "USB Touchscreen %04x:%04x",
1454 le16_to_cpu(udev->descriptor.idVendor),
1455 le16_to_cpu(udev->descriptor.idProduct));
1456
1457 usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys));
1458 strlcat(usbtouch->phys, "/input0", sizeof(usbtouch->phys));
1459
1460 input_dev->name = usbtouch->name;
1461 input_dev->phys = usbtouch->phys;
1462 usb_to_input_id(udev, &input_dev->id);
1463 input_dev->dev.parent = &intf->dev;
1464
1465 input_set_drvdata(input_dev, usbtouch);
1466
1467 input_dev->open = usbtouch_open;
1468 input_dev->close = usbtouch_close;
1469
1470 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
1471 input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
1472 input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0);
1473 input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0);
1474 if (type->max_press)
1475 input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press,
1476 type->max_press, 0, 0);
1477
1478 if (usb_endpoint_type(endpoint) == USB_ENDPOINT_XFER_INT)
1479 usb_fill_int_urb(usbtouch->irq, udev,
1480 usb_rcvintpipe(udev, endpoint->bEndpointAddress),
1481 usbtouch->data, type->rept_size,
1482 usbtouch_irq, usbtouch, endpoint->bInterval);
1483 else
1484 usb_fill_bulk_urb(usbtouch->irq, udev,
1485 usb_rcvbulkpipe(udev, endpoint->bEndpointAddress),
1486 usbtouch->data, type->rept_size,
1487 usbtouch_irq, usbtouch);
1488
1489 usbtouch->irq->dev = udev;
1490 usbtouch->irq->transfer_dma = usbtouch->data_dma;
1491 usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1492
1493 /* device specific allocations */
1494 if (type->alloc) {
1495 err = type->alloc(usbtouch);
1496 if (err) {
1497 dbg("%s - type->alloc() failed, err: %d", __func__, err);
1498 goto out_free_urb;
1499 }
1500 }
1501
1502 /* device specific initialisation*/
1503 if (type->init) {
1504 err = type->init(usbtouch);
1505 if (err) {
1506 dbg("%s - type->init() failed, err: %d", __func__, err);
1507 goto out_do_exit;
1508 }
1509 }
1510
1511 err = input_register_device(usbtouch->input);
1512 if (err) {
1513 dbg("%s - input_register_device failed, err: %d", __func__, err);
1514 goto out_do_exit;
1515 }
1516
1517 usb_set_intfdata(intf, usbtouch);
1518
1519 if (usbtouch->type->irq_always) {
1520 /* this can't fail */
1521 usb_autopm_get_interface(intf);
1522 err = usb_submit_urb(usbtouch->irq, GFP_KERNEL);
1523 if (err) {
1524 usb_autopm_put_interface(intf);
1525 err("%s - usb_submit_urb failed with result: %d",
1526 __func__, err);
1527 goto out_unregister_input;
1528 }
1529 }
1530
1531 return 0;
1532
1533 out_unregister_input:
1534 input_unregister_device(input_dev);
1535 input_dev = NULL;
1536 out_do_exit:
1537 if (type->exit)
1538 type->exit(usbtouch);
1539 out_free_urb:
1540 usb_free_urb(usbtouch->irq);
1541 out_free_buffers:
1542 usbtouch_free_buffers(udev, usbtouch);
1543 out_free:
1544 input_free_device(input_dev);
1545 kfree(usbtouch);
1546 return err;
1547 }
1548
1549 static void usbtouch_disconnect(struct usb_interface *intf)
1550 {
1551 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1552
1553 dbg("%s - called", __func__);
1554
1555 if (!usbtouch)
1556 return;
1557
1558 dbg("%s - usbtouch is initialized, cleaning up", __func__);
1559 usb_set_intfdata(intf, NULL);
1560 /* this will stop IO via close */
1561 input_unregister_device(usbtouch->input);
1562 usb_free_urb(usbtouch->irq);
1563 if (usbtouch->type->exit)
1564 usbtouch->type->exit(usbtouch);
1565 usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch);
1566 kfree(usbtouch);
1567 }
1568
1569 MODULE_DEVICE_TABLE(usb, usbtouch_devices);
1570
1571 static struct usb_driver usbtouch_driver = {
1572 .name = "usbtouchscreen",
1573 .probe = usbtouch_probe,
1574 .disconnect = usbtouch_disconnect,
1575 .suspend = usbtouch_suspend,
1576 .resume = usbtouch_resume,
1577 .reset_resume = usbtouch_reset_resume,
1578 .id_table = usbtouch_devices,
1579 .supports_autosuspend = 1,
1580 };
1581
1582 static int __init usbtouch_init(void)
1583 {
1584 return usb_register(&usbtouch_driver);
1585 }
1586
1587 static void __exit usbtouch_cleanup(void)
1588 {
1589 usb_deregister(&usbtouch_driver);
1590 }
1591
1592 module_init(usbtouch_init);
1593 module_exit(usbtouch_cleanup);
1594
1595 MODULE_AUTHOR(DRIVER_AUTHOR);
1596 MODULE_DESCRIPTION(DRIVER_DESC);
1597 MODULE_LICENSE("GPL");
1598
1599 MODULE_ALIAS("touchkitusb");
1600 MODULE_ALIAS("itmtouch");
1601 MODULE_ALIAS("mtouchusb");
kernel source for telekom puls (alcatel/mediatek)