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usbtouchscreen: add support for DMC TSC-10/25 devices
[linux-2.6/openmoko-kernel/knife-kernel.git] / drivers / usb / input / usbtouchscreen.c
blob49704d4ed0e296f7a850761a0c9bb84784f27797
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 *
13 * Copyright (C) 2004-2006 by Daniel Ritz <daniel.ritz@gmx.ch>
14 * Copyright (C) by Todd E. Johnson (mtouchusb.c)
15 *
16 * This program is free software; you can redistribute it and/or
17 * modify it under the terms of the GNU General Public License as
18 * published by the Free Software Foundation; either version 2 of the
19 * License, or (at your option) any later version.
20 *
21 * This program is distributed in the hope that it will be useful, but
22 * WITHOUT ANY WARRANTY; without even the implied warranty of
23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
24 * General Public License for more details.
25 *
26 * You should have received a copy of the GNU General Public License
27 * along with this program; if not, write to the Free Software
28 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
29 *
30 * Driver is based on touchkitusb.c
31 * - ITM parts are from itmtouch.c
32 * - 3M parts are from mtouchusb.c
33 * - PanJit parts are from an unmerged driver by Lanslott Gish
34 * - DMC TSC 10/25 are from Holger Schurig, with ideas from an unmerged
35 * driver from Marius Vollmer
36 *
37 *****************************************************************************/
38
39 //#define DEBUG
40
41 #include <linux/kernel.h>
42 #include <linux/slab.h>
43 #include <linux/input.h>
44 #include <linux/module.h>
45 #include <linux/init.h>
46 #include <linux/usb.h>
47 #include <linux/usb/input.h>
48
49
50 #define DRIVER_VERSION "v0.5"
51 #define DRIVER_AUTHOR "Daniel Ritz <daniel.ritz@gmx.ch>"
52 #define DRIVER_DESC "USB Touchscreen Driver"
53
54 static int swap_xy;
55 module_param(swap_xy, bool, 0644);
56 MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");
57
58 /* device specifc data/functions */
59 struct usbtouch_usb;
60 struct usbtouch_device_info {
61 int min_xc, max_xc;
62 int min_yc, max_yc;
63 int min_press, max_press;
64 int rept_size;
65 int flags;
66
67 void (*process_pkt) (struct usbtouch_usb *usbtouch, unsigned char *pkt, int len);
68 int (*get_pkt_len) (unsigned char *pkt, int len);
69 int (*read_data) (unsigned char *pkt, int *x, int *y, int *touch, int *press);
70 int (*init) (struct usbtouch_usb *usbtouch);
71 };
72
73 #define USBTOUCH_FLG_BUFFER 0x01
74
75
76 /* a usbtouch device */
77 struct usbtouch_usb {
78 unsigned char *data;
79 dma_addr_t data_dma;
80 unsigned char *buffer;
81 int buf_len;
82 struct urb *irq;
83 struct usb_device *udev;
84 struct input_dev *input;
85 struct usbtouch_device_info *type;
86 char name[128];
87 char phys[64];
88 };
89
90
91 #if defined(CONFIG_USB_TOUCHSCREEN_EGALAX) || defined(CONFIG_USB_TOUCHSCREEN_ETURBO)
92 #define MULTI_PACKET
93 #endif
94
95 #ifdef MULTI_PACKET
96 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
97 unsigned char *pkt, int len);
98 #endif
99
100 /* device types */
101 enum {
102 DEVTPYE_DUMMY = -1,
103 DEVTYPE_EGALAX,
104 DEVTYPE_PANJIT,
105 DEVTYPE_3M,
106 DEVTYPE_ITM,
107 DEVTYPE_ETURBO,
108 DEVTYPE_GUNZE,
109 DEVTYPE_DMC_TSC10,
110 };
111
112 static struct usb_device_id usbtouch_devices[] = {
113 #ifdef CONFIG_USB_TOUCHSCREEN_EGALAX
114 {USB_DEVICE(0x3823, 0x0001), .driver_info = DEVTYPE_EGALAX},
115 {USB_DEVICE(0x3823, 0x0002), .driver_info = DEVTYPE_EGALAX},
116 {USB_DEVICE(0x0123, 0x0001), .driver_info = DEVTYPE_EGALAX},
117 {USB_DEVICE(0x0eef, 0x0001), .driver_info = DEVTYPE_EGALAX},
118 {USB_DEVICE(0x0eef, 0x0002), .driver_info = DEVTYPE_EGALAX},
119 {USB_DEVICE(0x1234, 0x0001), .driver_info = DEVTYPE_EGALAX},
120 {USB_DEVICE(0x1234, 0x0002), .driver_info = DEVTYPE_EGALAX},
121 #endif
122
123 #ifdef CONFIG_USB_TOUCHSCREEN_PANJIT
124 {USB_DEVICE(0x134c, 0x0001), .driver_info = DEVTYPE_PANJIT},
125 {USB_DEVICE(0x134c, 0x0002), .driver_info = DEVTYPE_PANJIT},
126 {USB_DEVICE(0x134c, 0x0003), .driver_info = DEVTYPE_PANJIT},
127 {USB_DEVICE(0x134c, 0x0004), .driver_info = DEVTYPE_PANJIT},
128 #endif
129
130 #ifdef CONFIG_USB_TOUCHSCREEN_3M
131 {USB_DEVICE(0x0596, 0x0001), .driver_info = DEVTYPE_3M},
132 #endif
133
134 #ifdef CONFIG_USB_TOUCHSCREEN_ITM
135 {USB_DEVICE(0x0403, 0xf9e9), .driver_info = DEVTYPE_ITM},
136 #endif
137
138 #ifdef CONFIG_USB_TOUCHSCREEN_ETURBO
139 {USB_DEVICE(0x1234, 0x5678), .driver_info = DEVTYPE_ETURBO},
140 #endif
141
142 #ifdef CONFIG_USB_TOUCHSCREEN_GUNZE
143 {USB_DEVICE(0x0637, 0x0001), .driver_info = DEVTYPE_GUNZE},
144 #endif
145
146 #ifdef CONFIG_USB_TOUCHSCREEN_DMC_TSC10
147 {USB_DEVICE(0x0afa, 0x03e8), .driver_info = DEVTYPE_DMC_TSC10},
148 #endif
149
150 {}
151 };
152
153
154 /*****************************************************************************
155 * eGalax part
156 */
157
158 #ifdef CONFIG_USB_TOUCHSCREEN_EGALAX
159
160 #define EGALAX_PKT_TYPE_MASK 0xFE
161 #define EGALAX_PKT_TYPE_REPT 0x80
162 #define EGALAX_PKT_TYPE_DIAG 0x0A
163
164 static int egalax_read_data(unsigned char *pkt, int *x, int *y, int *touch, int *press)
165 {
166 if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT)
167 return 0;
168
169 *x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F);
170 *y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F);
171 *touch = pkt[0] & 0x01;
172
173 return 1;
174 }
175
176 static int egalax_get_pkt_len(unsigned char *buf, int len)
177 {
178 switch (buf[0] & EGALAX_PKT_TYPE_MASK) {
179 case EGALAX_PKT_TYPE_REPT:
180 return 5;
181
182 case EGALAX_PKT_TYPE_DIAG:
183 if (len < 2)
184 return -1;
185
186 return buf[1] + 2;
187 }
188
189 return 0;
190 }
191 #endif
192
193
194 /*****************************************************************************
195 * PanJit Part
196 */
197 #ifdef CONFIG_USB_TOUCHSCREEN_PANJIT
198 static int panjit_read_data(unsigned char *pkt, int *x, int *y, int *touch, int *press)
199 {
200 *x = ((pkt[2] & 0x0F) << 8) | pkt[1];
201 *y = ((pkt[4] & 0x0F) << 8) | pkt[3];
202 *touch = pkt[0] & 0x01;
203
204 return 1;
205 }
206 #endif
207
208
209 /*****************************************************************************
210 * 3M/Microtouch Part
211 */
212 #ifdef CONFIG_USB_TOUCHSCREEN_3M
213
214 #define MTOUCHUSB_ASYNC_REPORT 1
215 #define MTOUCHUSB_RESET 7
216 #define MTOUCHUSB_REQ_CTRLLR_ID 10
217
218 static int mtouch_read_data(unsigned char *pkt, int *x, int *y, int *touch, int *press)
219 {
220 *x = (pkt[8] << 8) | pkt[7];
221 *y = (pkt[10] << 8) | pkt[9];
222 *touch = (pkt[2] & 0x40) ? 1 : 0;
223
224 return 1;
225 }
226
227 static int mtouch_init(struct usbtouch_usb *usbtouch)
228 {
229 int ret, i;
230
231 ret = usb_control_msg(usbtouch->udev, usb_rcvctrlpipe(usbtouch->udev, 0),
232 MTOUCHUSB_RESET,
233 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
234 1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
235 dbg("%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d",
236 __FUNCTION__, ret);
237 if (ret < 0)
238 return ret;
239 msleep(150);
240
241 for (i = 0; i < 3; i++) {
242 ret = usb_control_msg(usbtouch->udev, usb_rcvctrlpipe(usbtouch->udev, 0),
243 MTOUCHUSB_ASYNC_REPORT,
244 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
245 1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT);
246 dbg("%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d",
247 __FUNCTION__, ret);
248 if (ret >= 0)
249 break;
250 if (ret != -EPIPE)
251 return ret;
252 }
253
254 return 0;
255 }
256 #endif
257
258
259 /*****************************************************************************
260 * ITM Part
261 */
262 #ifdef CONFIG_USB_TOUCHSCREEN_ITM
263 static int itm_read_data(unsigned char *pkt, int *x, int *y, int *touch, int *press)
264 {
265 *x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F);
266 *y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F);
267 *press = ((pkt[2] & 0x01) << 7) | (pkt[5] & 0x7F);
268 *touch = ~pkt[7] & 0x20;
269
270 return *touch;
271 }
272 #endif
273
274
275 /*****************************************************************************
276 * eTurboTouch part
277 */
278 #ifdef CONFIG_USB_TOUCHSCREEN_ETURBO
279 static int eturbo_read_data(unsigned char *pkt, int *x, int *y, int *touch, int *press)
280 {
281 unsigned int shift;
282
283 /* packets should start with sync */
284 if (!(pkt[0] & 0x80))
285 return 0;
286
287 shift = (6 - (pkt[0] & 0x03));
288 *x = ((pkt[3] << 7) | pkt[4]) >> shift;
289 *y = ((pkt[1] << 7) | pkt[2]) >> shift;
290 *touch = (pkt[0] & 0x10) ? 1 : 0;
291
292 return 1;
293 }
294
295 static int eturbo_get_pkt_len(unsigned char *buf, int len)
296 {
297 if (buf[0] & 0x80)
298 return 5;
299 if (buf[0] == 0x01)
300 return 3;
301 return 0;
302 }
303 #endif
304
305
306 /*****************************************************************************
307 * Gunze part
308 */
309 #ifdef CONFIG_USB_TOUCHSCREEN_GUNZE
310 static int gunze_read_data(unsigned char *pkt, int *x, int *y, int *touch, int *press)
311 {
312 if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80))
313 return 0;
314
315 *x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F);
316 *y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F);
317 *touch = pkt[0] & 0x20;
318
319 return 1;
320 }
321 #endif
322
323 /*****************************************************************************
324 * DMC TSC-10/25 Part
325 *
326 * Documentation about the controller and it's protocol can be found at
327 * http://www.dmccoltd.com/files/controler/tsc10usb_pi_e.pdf
328 * http://www.dmccoltd.com/files/controler/tsc25_usb_e.pdf
329 */
330 #ifdef CONFIG_USB_TOUCHSCREEN_DMC_TSC10
331
332 /* supported data rates. currently using 130 */
333 #define TSC10_RATE_POINT 0x50
334 #define TSC10_RATE_30 0x40
335 #define TSC10_RATE_50 0x41
336 #define TSC10_RATE_80 0x42
337 #define TSC10_RATE_100 0x43
338 #define TSC10_RATE_130 0x44
339 #define TSC10_RATE_150 0x45
340
341 /* commands */
342 #define TSC10_CMD_RESET 0x55
343 #define TSC10_CMD_RATE 0x05
344 #define TSC10_CMD_DATA1 0x01
345
346 static int dmc_tsc10_init(struct usbtouch_usb *usbtouch)
347 {
348 struct usb_device *dev = usbtouch->udev;
349 int ret;
350 unsigned char buf[2];
351
352 /* reset */
353 buf[0] = buf[1] = 0xFF;
354 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
355 TSC10_CMD_RESET,
356 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
357 0, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
358 if (ret < 0)
359 return ret;
360 if (buf[0] != 0x06 || buf[1] != 0x00)
361 return -ENODEV;
362
363 /* set coordinate output rate */
364 buf[0] = buf[1] = 0xFF;
365 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
366 TSC10_CMD_RATE,
367 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
368 TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
369 if (ret < 0)
370 return ret;
371 if (buf[0] != 0x06 || buf[1] != 0x00)
372 return -ENODEV;
373
374 /* start sending data */
375 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
376 TSC10_CMD_DATA1,
377 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
378 0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
379 if (ret < 0)
380 return ret;
381
382 return 0;
383 }
384
385
386 static int dmc_tsc10_read_data(unsigned char *pkt, int *x, int *y, int *touch, int *press)
387 {
388 *x = ((pkt[2] & 0x03) << 8) | pkt[1];
389 *y = ((pkt[4] & 0x03) << 8) | pkt[3];
390 *touch = pkt[0] & 0x01;
391
392 return 1;
393 }
394 #endif
395
396
397 /*****************************************************************************
398 * the different device descriptors
399 */
400 static struct usbtouch_device_info usbtouch_dev_info[] = {
401 #ifdef CONFIG_USB_TOUCHSCREEN_EGALAX
402 [DEVTYPE_EGALAX] = {
403 .min_xc = 0x0,
404 .max_xc = 0x07ff,
405 .min_yc = 0x0,
406 .max_yc = 0x07ff,
407 .rept_size = 16,
408 .flags = USBTOUCH_FLG_BUFFER,
409 .process_pkt = usbtouch_process_multi,
410 .get_pkt_len = egalax_get_pkt_len,
411 .read_data = egalax_read_data,
412 },
413 #endif
414
415 #ifdef CONFIG_USB_TOUCHSCREEN_PANJIT
416 [DEVTYPE_PANJIT] = {
417 .min_xc = 0x0,
418 .max_xc = 0x0fff,
419 .min_yc = 0x0,
420 .max_yc = 0x0fff,
421 .rept_size = 8,
422 .read_data = panjit_read_data,
423 },
424 #endif
425
426 #ifdef CONFIG_USB_TOUCHSCREEN_3M
427 [DEVTYPE_3M] = {
428 .min_xc = 0x0,
429 .max_xc = 0x4000,
430 .min_yc = 0x0,
431 .max_yc = 0x4000,
432 .rept_size = 11,
433 .read_data = mtouch_read_data,
434 .init = mtouch_init,
435 },
436 #endif
437
438 #ifdef CONFIG_USB_TOUCHSCREEN_ITM
439 [DEVTYPE_ITM] = {
440 .min_xc = 0x0,
441 .max_xc = 0x0fff,
442 .min_yc = 0x0,
443 .max_yc = 0x0fff,
444 .max_press = 0xff,
445 .rept_size = 8,
446 .read_data = itm_read_data,
447 },
448 #endif
449
450 #ifdef CONFIG_USB_TOUCHSCREEN_ETURBO
451 [DEVTYPE_ETURBO] = {
452 .min_xc = 0x0,
453 .max_xc = 0x07ff,
454 .min_yc = 0x0,
455 .max_yc = 0x07ff,
456 .rept_size = 8,
457 .flags = USBTOUCH_FLG_BUFFER,
458 .process_pkt = usbtouch_process_multi,
459 .get_pkt_len = eturbo_get_pkt_len,
460 .read_data = eturbo_read_data,
461 },
462 #endif
463
464 #ifdef CONFIG_USB_TOUCHSCREEN_GUNZE
465 [DEVTYPE_GUNZE] = {
466 .min_xc = 0x0,
467 .max_xc = 0x0fff,
468 .min_yc = 0x0,
469 .max_yc = 0x0fff,
470 .rept_size = 4,
471 .read_data = gunze_read_data,
472 },
473 #endif
474
475 #ifdef CONFIG_USB_TOUCHSCREEN_DMC_TSC10
476 [DEVTYPE_DMC_TSC10] = {
477 .min_xc = 0x0,
478 .max_xc = 0x03ff,
479 .min_yc = 0x0,
480 .max_yc = 0x03ff,
481 .rept_size = 5,
482 .init = dmc_tsc10_init,
483 .read_data = dmc_tsc10_read_data,
484 },
485 #endif
486 };
487
488
489 /*****************************************************************************
490 * Generic Part
491 */
492 static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
493 unsigned char *pkt, int len)
494 {
495 int x, y, touch, press;
496 struct usbtouch_device_info *type = usbtouch->type;
497
498 if (!type->read_data(pkt, &x, &y, &touch, &press))
499 return;
500
501 input_report_key(usbtouch->input, BTN_TOUCH, touch);
502
503 if (swap_xy) {
504 input_report_abs(usbtouch->input, ABS_X, y);
505 input_report_abs(usbtouch->input, ABS_Y, x);
506 } else {
507 input_report_abs(usbtouch->input, ABS_X, x);
508 input_report_abs(usbtouch->input, ABS_Y, y);
509 }
510 if (type->max_press)
511 input_report_abs(usbtouch->input, ABS_PRESSURE, press);
512 input_sync(usbtouch->input);
513 }
514
515
516 #ifdef MULTI_PACKET
517 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
518 unsigned char *pkt, int len)
519 {
520 unsigned char *buffer;
521 int pkt_len, pos, buf_len, tmp;
522
523 /* process buffer */
524 if (unlikely(usbtouch->buf_len)) {
525 /* try to get size */
526 pkt_len = usbtouch->type->get_pkt_len(
527 usbtouch->buffer, usbtouch->buf_len);
528
529 /* drop? */
530 if (unlikely(!pkt_len))
531 goto out_flush_buf;
532
533 /* need to append -pkt_len bytes before able to get size */
534 if (unlikely(pkt_len < 0)) {
535 int append = -pkt_len;
536 if (unlikely(append > len))
537 append = len;
538 if (usbtouch->buf_len + append >= usbtouch->type->rept_size)
539 goto out_flush_buf;
540 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append);
541 usbtouch->buf_len += append;
542
543 pkt_len = usbtouch->type->get_pkt_len(
544 usbtouch->buffer, usbtouch->buf_len);
545 if (pkt_len < 0)
546 return;
547 }
548
549 /* append */
550 tmp = pkt_len - usbtouch->buf_len;
551 if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size)
552 goto out_flush_buf;
553 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp);
554 usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len);
555
556 buffer = pkt + tmp;
557 buf_len = len - tmp;
558 } else {
559 buffer = pkt;
560 buf_len = len;
561 }
562
563 /* loop over the received packet, process */
564 pos = 0;
565 while (pos < buf_len) {
566 /* get packet len */
567 pkt_len = usbtouch->type->get_pkt_len(buffer + pos, len);
568
569 /* unknown packet: drop everything */
570 if (unlikely(!pkt_len))
571 goto out_flush_buf;
572
573 /* full packet: process */
574 if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) {
575 usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len);
576 } else {
577 /* incomplete packet: save in buffer */
578 memcpy(usbtouch->buffer, buffer + pos, buf_len - pos);
579 usbtouch->buf_len = buf_len - pos;
580 return;
581 }
582 pos += pkt_len;
583 }
584
585 out_flush_buf:
586 usbtouch->buf_len = 0;
587 return;
588 }
589 #endif
590
591
592 static void usbtouch_irq(struct urb *urb)
593 {
594 struct usbtouch_usb *usbtouch = urb->context;
595 int retval;
596
597 switch (urb->status) {
598 case 0:
599 /* success */
600 break;
601 case -ETIME:
602 /* this urb is timing out */
603 dbg("%s - urb timed out - was the device unplugged?",
604 __FUNCTION__);
605 return;
606 case -ECONNRESET:
607 case -ENOENT:
608 case -ESHUTDOWN:
609 /* this urb is terminated, clean up */
610 dbg("%s - urb shutting down with status: %d",
611 __FUNCTION__, urb->status);
612 return;
613 default:
614 dbg("%s - nonzero urb status received: %d",
615 __FUNCTION__, urb->status);
616 goto exit;
617 }
618
619 usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length);
620
621 exit:
622 retval = usb_submit_urb(urb, GFP_ATOMIC);
623 if (retval)
624 err("%s - usb_submit_urb failed with result: %d",
625 __FUNCTION__, retval);
626 }
627
628 static int usbtouch_open(struct input_dev *input)
629 {
630 struct usbtouch_usb *usbtouch = input->private;
631
632 usbtouch->irq->dev = usbtouch->udev;
633
634 if (usb_submit_urb(usbtouch->irq, GFP_KERNEL))
635 return -EIO;
636
637 return 0;
638 }
639
640 static void usbtouch_close(struct input_dev *input)
641 {
642 struct usbtouch_usb *usbtouch = input->private;
643
644 usb_kill_urb(usbtouch->irq);
645 }
646
647
648 static void usbtouch_free_buffers(struct usb_device *udev,
649 struct usbtouch_usb *usbtouch)
650 {
651 if (usbtouch->data)
652 usb_buffer_free(udev, usbtouch->type->rept_size,
653 usbtouch->data, usbtouch->data_dma);
654 kfree(usbtouch->buffer);
655 }
656
657
658 static int usbtouch_probe(struct usb_interface *intf,
659 const struct usb_device_id *id)
660 {
661 struct usbtouch_usb *usbtouch;
662 struct input_dev *input_dev;
663 struct usb_host_interface *interface;
664 struct usb_endpoint_descriptor *endpoint;
665 struct usb_device *udev = interface_to_usbdev(intf);
666 struct usbtouch_device_info *type;
667 int err = -ENOMEM;
668
669 interface = intf->cur_altsetting;
670 endpoint = &interface->endpoint[0].desc;
671
672 usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL);
673 input_dev = input_allocate_device();
674 if (!usbtouch || !input_dev)
675 goto out_free;
676
677 type = &usbtouch_dev_info[id->driver_info];
678 usbtouch->type = type;
679 if (!type->process_pkt)
680 type->process_pkt = usbtouch_process_pkt;
681
682 usbtouch->data = usb_buffer_alloc(udev, type->rept_size,
683 SLAB_KERNEL, &usbtouch->data_dma);
684 if (!usbtouch->data)
685 goto out_free;
686
687 if (type->flags & USBTOUCH_FLG_BUFFER) {
688 usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL);
689 if (!usbtouch->buffer)
690 goto out_free_buffers;
691 }
692
693 usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
694 if (!usbtouch->irq) {
695 dbg("%s - usb_alloc_urb failed: usbtouch->irq", __FUNCTION__);
696 goto out_free_buffers;
697 }
698
699 usbtouch->udev = udev;
700 usbtouch->input = input_dev;
701
702 if (udev->manufacturer)
703 strlcpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name));
704
705 if (udev->product) {
706 if (udev->manufacturer)
707 strlcat(usbtouch->name, " ", sizeof(usbtouch->name));
708 strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name));
709 }
710
711 if (!strlen(usbtouch->name))
712 snprintf(usbtouch->name, sizeof(usbtouch->name),
713 "USB Touchscreen %04x:%04x",
714 le16_to_cpu(udev->descriptor.idVendor),
715 le16_to_cpu(udev->descriptor.idProduct));
716
717 usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys));
718 strlcpy(usbtouch->phys, "/input0", sizeof(usbtouch->phys));
719
720 input_dev->name = usbtouch->name;
721 input_dev->phys = usbtouch->phys;
722 usb_to_input_id(udev, &input_dev->id);
723 input_dev->cdev.dev = &intf->dev;
724 input_dev->private = usbtouch;
725 input_dev->open = usbtouch_open;
726 input_dev->close = usbtouch_close;
727
728 input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
729 input_dev->keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH);
730 input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0);
731 input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0);
732 if (type->max_press)
733 input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press,
734 type->max_press, 0, 0);
735
736 usb_fill_int_urb(usbtouch->irq, usbtouch->udev,
737 usb_rcvintpipe(usbtouch->udev, endpoint->bEndpointAddress),
738 usbtouch->data, type->rept_size,
739 usbtouch_irq, usbtouch, endpoint->bInterval);
740
741 usbtouch->irq->dev = usbtouch->udev;
742 usbtouch->irq->transfer_dma = usbtouch->data_dma;
743 usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
744
745 /* device specific init */
746 if (type->init) {
747 err = type->init(usbtouch);
748 if (err) {
749 dbg("%s - type->init() failed, err: %d", __FUNCTION__, err);
750 goto out_free_buffers;
751 }
752 }
753
754 err = input_register_device(usbtouch->input);
755 if (err) {
756 dbg("%s - input_register_device failed, err: %d", __FUNCTION__, err);
757 goto out_free_buffers;
758 }
759
760 usb_set_intfdata(intf, usbtouch);
761
762 return 0;
763
764 out_free_buffers:
765 usbtouch_free_buffers(udev, usbtouch);
766 out_free:
767 input_free_device(input_dev);
768 kfree(usbtouch);
769 return err;
770 }
771
772 static void usbtouch_disconnect(struct usb_interface *intf)
773 {
774 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
775
776 dbg("%s - called", __FUNCTION__);
777
778 if (!usbtouch)
779 return;
780
781 dbg("%s - usbtouch is initialized, cleaning up", __FUNCTION__);
782 usb_set_intfdata(intf, NULL);
783 usb_kill_urb(usbtouch->irq);
784 input_unregister_device(usbtouch->input);
785 usb_free_urb(usbtouch->irq);
786 usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch);
787 kfree(usbtouch);
788 }
789
790 MODULE_DEVICE_TABLE(usb, usbtouch_devices);
791
792 static struct usb_driver usbtouch_driver = {
793 .name = "usbtouchscreen",
794 .probe = usbtouch_probe,
795 .disconnect = usbtouch_disconnect,
796 .id_table = usbtouch_devices,
797 };
798
799 static int __init usbtouch_init(void)
800 {
801 return usb_register(&usbtouch_driver);
802 }
803
804 static void __exit usbtouch_cleanup(void)
805 {
806 usb_deregister(&usbtouch_driver);
807 }
808
809 module_init(usbtouch_init);
810 module_exit(usbtouch_cleanup);
811
812 MODULE_AUTHOR(DRIVER_AUTHOR);
813 MODULE_DESCRIPTION(DRIVER_DESC);
814 MODULE_LICENSE("GPL");
815
816 MODULE_ALIAS("touchkitusb");
817 MODULE_ALIAS("itmtouch");
818 MODULE_ALIAS("mtouchusb");
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