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1// SPDX-License-Identifier: GPL-2.0-or-later
2/******************************************************************************
3 * usbtouchscreen.c
4 * Driver for USB Touchscreens, supporting those devices:
5 * - eGalax Touchkit
6 * includes eTurboTouch CT-410/510/700
7 * - 3M/Microtouch EX II series
8 * - ITM
9 * - PanJit TouchSet
10 * - eTurboTouch
11 * - Gunze AHL61
12 * - DMC TSC-10/25
13 * - IRTOUCHSYSTEMS/UNITOP
14 * - IdealTEK URTC1000
15 * - General Touch
16 * - GoTop Super_Q2/GogoPen/PenPower tablets
17 * - JASTEC USB touch controller/DigiTech DTR-02U
18 * - Zytronic capacitive touchscreen
19 * - NEXIO/iNexio
20 * - Elo TouchSystems 2700 IntelliTouch
21 * - EasyTouch USB Dual/Multi touch controller from Data Modul
22 *
23 * Copyright (C) 2004-2007 by Daniel Ritz <daniel.ritz@gmx.ch>
24 * Copyright (C) by Todd E. Johnson (mtouchusb.c)
25 *
26 * Driver is based on touchkitusb.c
27 * - ITM parts are from itmtouch.c
28 * - 3M parts are from mtouchusb.c
29 * - PanJit parts are from an unmerged driver by Lanslott Gish
30 * - DMC TSC 10/25 are from Holger Schurig, with ideas from an unmerged
31 * driver from Marius Vollmer
32 *
33 *****************************************************************************/
34
35//#define DEBUG
36
37#include <linux/kernel.h>
38#include <linux/slab.h>
39#include <linux/input.h>
40#include <linux/module.h>
41#include <linux/usb.h>
42#include <linux/usb/input.h>
43#include <linux/hid.h>
44#include <linux/mutex.h>
45
46static bool swap_xy;
47module_param(swap_xy, bool, 0644);
48MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");
49
50static bool hwcalib_xy;
51module_param(hwcalib_xy, bool, 0644);
52MODULE_PARM_DESC(hwcalib_xy, "If set hw-calibrated X/Y are used if available");
53
54/* device specifc data/functions */
55struct usbtouch_usb;
56struct usbtouch_device_info {
57 int min_xc, max_xc;
58 int min_yc, max_yc;
59 int min_press, max_press;
60 int rept_size;
61
62 /*
63 * Always service the USB devices irq not just when the input device is
64 * open. This is useful when devices have a watchdog which prevents us
65 * from periodically polling the device. Leave this unset unless your
66 * touchscreen device requires it, as it does consume more of the USB
67 * bandwidth.
68 */
69 bool irq_always;
70
71 void (*process_pkt) (struct usbtouch_usb *usbtouch, unsigned char *pkt, int len);
72
73 /*
74 * used to get the packet len. possible return values:
75 * > 0: packet len
76 * = 0: skip one byte
77 * < 0: -return value more bytes needed
78 */
79 int (*get_pkt_len) (unsigned char *pkt, int len);
80
81 int (*read_data) (struct usbtouch_usb *usbtouch, unsigned char *pkt);
82 int (*alloc) (struct usbtouch_usb *usbtouch);
83 int (*init) (struct usbtouch_usb *usbtouch);
84 void (*exit) (struct usbtouch_usb *usbtouch);
85};
86
87/* a usbtouch device */
88struct usbtouch_usb {
89 unsigned char *data;
90 dma_addr_t data_dma;
91 int data_size;
92 unsigned char *buffer;
93 int buf_len;
94 struct urb *irq;
95 struct usb_interface *interface;
96 struct input_dev *input;
97 struct usbtouch_device_info *type;
98 struct mutex pm_mutex; /* serialize access to open/suspend */
99 bool is_open;
100 char name[128];
101 char phys[64];
102 void *priv;
103
104 int x, y;
105 int touch, press;
106};
107
108
109/* device types */
110enum {
111 DEVTYPE_IGNORE = -1,
112 DEVTYPE_EGALAX,
113 DEVTYPE_PANJIT,
114 DEVTYPE_3M,
115 DEVTYPE_ITM,
116 DEVTYPE_ETURBO,
117 DEVTYPE_GUNZE,
118 DEVTYPE_DMC_TSC10,
119 DEVTYPE_IRTOUCH,
120 DEVTYPE_IRTOUCH_HIRES,
121 DEVTYPE_IDEALTEK,
122 DEVTYPE_GENERAL_TOUCH,
123 DEVTYPE_GOTOP,
124 DEVTYPE_JASTEC,
125 DEVTYPE_E2I,
126 DEVTYPE_ZYTRONIC,
127 DEVTYPE_TC45USB,
128 DEVTYPE_NEXIO,
129 DEVTYPE_ELO,
130 DEVTYPE_ETOUCH,
131};
132
133#define USB_DEVICE_HID_CLASS(vend, prod) \
134 .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS \
135 | USB_DEVICE_ID_MATCH_DEVICE, \
136 .idVendor = (vend), \
137 .idProduct = (prod), \
138 .bInterfaceClass = USB_INTERFACE_CLASS_HID
139
140static const struct usb_device_id usbtouch_devices[] = {
141#ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
142 /* ignore the HID capable devices, handled by usbhid */
143 {USB_DEVICE_HID_CLASS(0x0eef, 0x0001), .driver_info = DEVTYPE_IGNORE},
144 {USB_DEVICE_HID_CLASS(0x0eef, 0x0002), .driver_info = DEVTYPE_IGNORE},
145
146 /* normal device IDs */
147 {USB_DEVICE(0x3823, 0x0001), .driver_info = DEVTYPE_EGALAX},
148 {USB_DEVICE(0x3823, 0x0002), .driver_info = DEVTYPE_EGALAX},
149 {USB_DEVICE(0x0123, 0x0001), .driver_info = DEVTYPE_EGALAX},
150 {USB_DEVICE(0x0eef, 0x0001), .driver_info = DEVTYPE_EGALAX},
151 {USB_DEVICE(0x0eef, 0x0002), .driver_info = DEVTYPE_EGALAX},
152 {USB_DEVICE(0x1234, 0x0001), .driver_info = DEVTYPE_EGALAX},
153 {USB_DEVICE(0x1234, 0x0002), .driver_info = DEVTYPE_EGALAX},
154#endif
155
156#ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
157 {USB_DEVICE(0x134c, 0x0001), .driver_info = DEVTYPE_PANJIT},
158 {USB_DEVICE(0x134c, 0x0002), .driver_info = DEVTYPE_PANJIT},
159 {USB_DEVICE(0x134c, 0x0003), .driver_info = DEVTYPE_PANJIT},
160 {USB_DEVICE(0x134c, 0x0004), .driver_info = DEVTYPE_PANJIT},
161#endif
162
163#ifdef CONFIG_TOUCHSCREEN_USB_3M
164 {USB_DEVICE(0x0596, 0x0001), .driver_info = DEVTYPE_3M},
165#endif
166
167#ifdef CONFIG_TOUCHSCREEN_USB_ITM
168 {USB_DEVICE(0x0403, 0xf9e9), .driver_info = DEVTYPE_ITM},
169 {USB_DEVICE(0x16e3, 0xf9e9), .driver_info = DEVTYPE_ITM},
170#endif
171
172#ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
173 {USB_DEVICE(0x1234, 0x5678), .driver_info = DEVTYPE_ETURBO},
174#endif
175
176#ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
177 {USB_DEVICE(0x0637, 0x0001), .driver_info = DEVTYPE_GUNZE},
178#endif
179
180#ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
181 {USB_DEVICE(0x0afa, 0x03e8), .driver_info = DEVTYPE_DMC_TSC10},
182#endif
183
184#ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
185 {USB_DEVICE(0x255e, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
186 {USB_DEVICE(0x595a, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
187 {USB_DEVICE(0x6615, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
188 {USB_DEVICE(0x6615, 0x0012), .driver_info = DEVTYPE_IRTOUCH_HIRES},
189#endif
190
191#ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
192 {USB_DEVICE(0x1391, 0x1000), .driver_info = DEVTYPE_IDEALTEK},
193#endif
194
195#ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
196 {USB_DEVICE(0x0dfc, 0x0001), .driver_info = DEVTYPE_GENERAL_TOUCH},
197#endif
198
199#ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
200 {USB_DEVICE(0x08f2, 0x007f), .driver_info = DEVTYPE_GOTOP},
201 {USB_DEVICE(0x08f2, 0x00ce), .driver_info = DEVTYPE_GOTOP},
202 {USB_DEVICE(0x08f2, 0x00f4), .driver_info = DEVTYPE_GOTOP},
203#endif
204
205#ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
206 {USB_DEVICE(0x0f92, 0x0001), .driver_info = DEVTYPE_JASTEC},
207#endif
208
209#ifdef CONFIG_TOUCHSCREEN_USB_E2I
210 {USB_DEVICE(0x1ac7, 0x0001), .driver_info = DEVTYPE_E2I},
211#endif
212
213#ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
214 {USB_DEVICE(0x14c8, 0x0003), .driver_info = DEVTYPE_ZYTRONIC},
215#endif
216
217#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
218 /* TC5UH */
219 {USB_DEVICE(0x0664, 0x0309), .driver_info = DEVTYPE_TC45USB},
220 /* TC4UM */
221 {USB_DEVICE(0x0664, 0x0306), .driver_info = DEVTYPE_TC45USB},
222#endif
223
224#ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
225 /* data interface only */
226 {USB_DEVICE_AND_INTERFACE_INFO(0x10f0, 0x2002, 0x0a, 0x00, 0x00),
227 .driver_info = DEVTYPE_NEXIO},
228 {USB_DEVICE_AND_INTERFACE_INFO(0x1870, 0x0001, 0x0a, 0x00, 0x00),
229 .driver_info = DEVTYPE_NEXIO},
230#endif
231
232#ifdef CONFIG_TOUCHSCREEN_USB_ELO
233 {USB_DEVICE(0x04e7, 0x0020), .driver_info = DEVTYPE_ELO},
234#endif
235
236#ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
237 {USB_DEVICE(0x7374, 0x0001), .driver_info = DEVTYPE_ETOUCH},
238#endif
239
240 {}
241};
242
243
244/*****************************************************************************
245 * e2i Part
246 */
247
248#ifdef CONFIG_TOUCHSCREEN_USB_E2I
249static int e2i_init(struct usbtouch_usb *usbtouch)
250{
251 int ret;
252 struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
253
254 ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
255 0x01, 0x02, 0x0000, 0x0081,
256 NULL, 0, USB_CTRL_SET_TIMEOUT);
257
258 dev_dbg(&usbtouch->interface->dev,
259 "%s - usb_control_msg - E2I_RESET - bytes|err: %d\n",
260 __func__, ret);
261 return ret;
262}
263
264static 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
293static int egalax_init(struct usbtouch_usb *usbtouch)
294{
295 int ret, i;
296 unsigned char *buf;
297 struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
298
299 /*
300 * An eGalax diagnostic packet kicks the device into using the right
301 * protocol. We send a "check active" packet. The response will be
302 * read later and ignored.
303 */
304
305 buf = kmalloc(3, GFP_KERNEL);
306 if (!buf)
307 return -ENOMEM;
308
309 buf[0] = EGALAX_PKT_TYPE_DIAG;
310 buf[1] = 1; /* length */
311 buf[2] = 'A'; /* command - check active */
312
313 for (i = 0; i < 3; i++) {
314 ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
315 0,
316 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
317 0, 0, buf, 3,
318 USB_CTRL_SET_TIMEOUT);
319 if (ret >= 0) {
320 ret = 0;
321 break;
322 }
323 if (ret != -EPIPE)
324 break;
325 }
326
327 kfree(buf);
328
329 return ret;
330}
331
332static int egalax_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
333{
334 if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT)
335 return 0;
336
337 dev->x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F);
338 dev->y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F);
339 dev->touch = pkt[0] & 0x01;
340
341 return 1;
342}
343
344static int egalax_get_pkt_len(unsigned char *buf, int len)
345{
346 switch (buf[0] & EGALAX_PKT_TYPE_MASK) {
347 case EGALAX_PKT_TYPE_REPT:
348 return 5;
349
350 case EGALAX_PKT_TYPE_DIAG:
351 if (len < 2)
352 return -1;
353
354 return buf[1] + 2;
355 }
356
357 return 0;
358}
359#endif
360
361/*****************************************************************************
362 * EasyTouch part
363 */
364
365#ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
366
367#ifndef MULTI_PACKET
368#define MULTI_PACKET
369#endif
370
371#define ETOUCH_PKT_TYPE_MASK 0xFE
372#define ETOUCH_PKT_TYPE_REPT 0x80
373#define ETOUCH_PKT_TYPE_REPT2 0xB0
374#define ETOUCH_PKT_TYPE_DIAG 0x0A
375
376static int etouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
377{
378 if ((pkt[0] & ETOUCH_PKT_TYPE_MASK) != ETOUCH_PKT_TYPE_REPT &&
379 (pkt[0] & ETOUCH_PKT_TYPE_MASK) != ETOUCH_PKT_TYPE_REPT2)
380 return 0;
381
382 dev->x = ((pkt[1] & 0x1F) << 7) | (pkt[2] & 0x7F);
383 dev->y = ((pkt[3] & 0x1F) << 7) | (pkt[4] & 0x7F);
384 dev->touch = pkt[0] & 0x01;
385
386 return 1;
387}
388
389static int etouch_get_pkt_len(unsigned char *buf, int len)
390{
391 switch (buf[0] & ETOUCH_PKT_TYPE_MASK) {
392 case ETOUCH_PKT_TYPE_REPT:
393 case ETOUCH_PKT_TYPE_REPT2:
394 return 5;
395
396 case ETOUCH_PKT_TYPE_DIAG:
397 if (len < 2)
398 return -1;
399
400 return buf[1] + 2;
401 }
402
403 return 0;
404}
405#endif
406
407/*****************************************************************************
408 * PanJit Part
409 */
410#ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
411static int panjit_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
412{
413 dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
414 dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
415 dev->touch = pkt[0] & 0x01;
416
417 return 1;
418}
419#endif
420
421
422/*****************************************************************************
423 * 3M/Microtouch Part
424 */
425#ifdef CONFIG_TOUCHSCREEN_USB_3M
426
427#define MTOUCHUSB_ASYNC_REPORT 1
428#define MTOUCHUSB_RESET 7
429#define MTOUCHUSB_REQ_CTRLLR_ID 10
430
431#define MTOUCHUSB_REQ_CTRLLR_ID_LEN 16
432
433static int mtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
434{
435 if (hwcalib_xy) {
436 dev->x = (pkt[4] << 8) | pkt[3];
437 dev->y = 0xffff - ((pkt[6] << 8) | pkt[5]);
438 } else {
439 dev->x = (pkt[8] << 8) | pkt[7];
440 dev->y = (pkt[10] << 8) | pkt[9];
441 }
442 dev->touch = (pkt[2] & 0x40) ? 1 : 0;
443
444 return 1;
445}
446
447struct mtouch_priv {
448 u8 fw_rev_major;
449 u8 fw_rev_minor;
450};
451
452static ssize_t mtouch_firmware_rev_show(struct device *dev,
453 struct device_attribute *attr, char *output)
454{
455 struct usb_interface *intf = to_usb_interface(dev);
456 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
457 struct mtouch_priv *priv = usbtouch->priv;
458
459 return sysfs_emit(output, "%1x.%1x\n",
460 priv->fw_rev_major, priv->fw_rev_minor);
461}
462static DEVICE_ATTR(firmware_rev, 0444, mtouch_firmware_rev_show, NULL);
463
464static struct attribute *mtouch_attrs[] = {
465 &dev_attr_firmware_rev.attr,
466 NULL
467};
468
469static const struct attribute_group mtouch_attr_group = {
470 .attrs = mtouch_attrs,
471};
472
473static int mtouch_get_fw_revision(struct usbtouch_usb *usbtouch)
474{
475 struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
476 struct mtouch_priv *priv = usbtouch->priv;
477 u8 *buf;
478 int ret;
479
480 buf = kzalloc(MTOUCHUSB_REQ_CTRLLR_ID_LEN, GFP_NOIO);
481 if (!buf)
482 return -ENOMEM;
483
484 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
485 MTOUCHUSB_REQ_CTRLLR_ID,
486 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
487 0, 0, buf, MTOUCHUSB_REQ_CTRLLR_ID_LEN,
488 USB_CTRL_SET_TIMEOUT);
489 if (ret != MTOUCHUSB_REQ_CTRLLR_ID_LEN) {
490 dev_warn(&usbtouch->interface->dev,
491 "Failed to read FW rev: %d\n", ret);
492 ret = ret < 0 ? ret : -EIO;
493 goto free;
494 }
495
496 priv->fw_rev_major = buf[3];
497 priv->fw_rev_minor = buf[4];
498
499 ret = 0;
500
501free:
502 kfree(buf);
503 return ret;
504}
505
506static int mtouch_alloc(struct usbtouch_usb *usbtouch)
507{
508 int ret;
509
510 usbtouch->priv = kmalloc(sizeof(struct mtouch_priv), GFP_KERNEL);
511 if (!usbtouch->priv)
512 return -ENOMEM;
513
514 ret = sysfs_create_group(&usbtouch->interface->dev.kobj,
515 &mtouch_attr_group);
516 if (ret) {
517 kfree(usbtouch->priv);
518 usbtouch->priv = NULL;
519 return ret;
520 }
521
522 return 0;
523}
524
525static int mtouch_init(struct usbtouch_usb *usbtouch)
526{
527 int ret, i;
528 struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
529
530 ret = mtouch_get_fw_revision(usbtouch);
531 if (ret)
532 return ret;
533
534 ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
535 MTOUCHUSB_RESET,
536 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
537 1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
538 dev_dbg(&usbtouch->interface->dev,
539 "%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d\n",
540 __func__, ret);
541 if (ret < 0)
542 return ret;
543 msleep(150);
544
545 for (i = 0; i < 3; i++) {
546 ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
547 MTOUCHUSB_ASYNC_REPORT,
548 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
549 1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT);
550 dev_dbg(&usbtouch->interface->dev,
551 "%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d\n",
552 __func__, ret);
553 if (ret >= 0)
554 break;
555 if (ret != -EPIPE)
556 return ret;
557 }
558
559 /* Default min/max xy are the raw values, override if using hw-calib */
560 if (hwcalib_xy) {
561 input_set_abs_params(usbtouch->input, ABS_X, 0, 0xffff, 0, 0);
562 input_set_abs_params(usbtouch->input, ABS_Y, 0, 0xffff, 0, 0);
563 }
564
565 return 0;
566}
567
568static void mtouch_exit(struct usbtouch_usb *usbtouch)
569{
570 struct mtouch_priv *priv = usbtouch->priv;
571
572 sysfs_remove_group(&usbtouch->interface->dev.kobj, &mtouch_attr_group);
573 kfree(priv);
574}
575#endif
576
577
578/*****************************************************************************
579 * ITM Part
580 */
581#ifdef CONFIG_TOUCHSCREEN_USB_ITM
582static int itm_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
583{
584 int touch;
585 /*
586 * ITM devices report invalid x/y data if not touched.
587 * if the screen was touched before but is not touched any more
588 * report touch as 0 with the last valid x/y data once. then stop
589 * reporting data until touched again.
590 */
591 dev->press = ((pkt[2] & 0x01) << 7) | (pkt[5] & 0x7F);
592
593 touch = ~pkt[7] & 0x20;
594 if (!touch) {
595 if (dev->touch) {
596 dev->touch = 0;
597 return 1;
598 }
599
600 return 0;
601 }
602
603 dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F);
604 dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F);
605 dev->touch = touch;
606
607 return 1;
608}
609#endif
610
611
612/*****************************************************************************
613 * eTurboTouch part
614 */
615#ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
616#ifndef MULTI_PACKET
617#define MULTI_PACKET
618#endif
619static int eturbo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
620{
621 unsigned int shift;
622
623 /* packets should start with sync */
624 if (!(pkt[0] & 0x80))
625 return 0;
626
627 shift = (6 - (pkt[0] & 0x03));
628 dev->x = ((pkt[3] << 7) | pkt[4]) >> shift;
629 dev->y = ((pkt[1] << 7) | pkt[2]) >> shift;
630 dev->touch = (pkt[0] & 0x10) ? 1 : 0;
631
632 return 1;
633}
634
635static int eturbo_get_pkt_len(unsigned char *buf, int len)
636{
637 if (buf[0] & 0x80)
638 return 5;
639 if (buf[0] == 0x01)
640 return 3;
641 return 0;
642}
643#endif
644
645
646/*****************************************************************************
647 * Gunze part
648 */
649#ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
650static int gunze_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
651{
652 if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80))
653 return 0;
654
655 dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F);
656 dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F);
657 dev->touch = pkt[0] & 0x20;
658
659 return 1;
660}
661#endif
662
663/*****************************************************************************
664 * DMC TSC-10/25 Part
665 *
666 * Documentation about the controller and it's protocol can be found at
667 * http://www.dmccoltd.com/files/controler/tsc10usb_pi_e.pdf
668 * http://www.dmccoltd.com/files/controler/tsc25_usb_e.pdf
669 */
670#ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
671
672/* supported data rates. currently using 130 */
673#define TSC10_RATE_POINT 0x50
674#define TSC10_RATE_30 0x40
675#define TSC10_RATE_50 0x41
676#define TSC10_RATE_80 0x42
677#define TSC10_RATE_100 0x43
678#define TSC10_RATE_130 0x44
679#define TSC10_RATE_150 0x45
680
681/* commands */
682#define TSC10_CMD_RESET 0x55
683#define TSC10_CMD_RATE 0x05
684#define TSC10_CMD_DATA1 0x01
685
686static int dmc_tsc10_init(struct usbtouch_usb *usbtouch)
687{
688 struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
689 int ret = -ENOMEM;
690 unsigned char *buf;
691
692 buf = kmalloc(2, GFP_NOIO);
693 if (!buf)
694 goto err_nobuf;
695 /* reset */
696 buf[0] = buf[1] = 0xFF;
697 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
698 TSC10_CMD_RESET,
699 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
700 0, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
701 if (ret < 0)
702 goto err_out;
703 if (buf[0] != 0x06) {
704 ret = -ENODEV;
705 goto err_out;
706 }
707
708 /* TSC-25 data sheet specifies a delay after the RESET command */
709 msleep(150);
710
711 /* set coordinate output rate */
712 buf[0] = buf[1] = 0xFF;
713 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
714 TSC10_CMD_RATE,
715 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
716 TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
717 if (ret < 0)
718 goto err_out;
719 if ((buf[0] != 0x06) && (buf[0] != 0x15 || buf[1] != 0x01)) {
720 ret = -ENODEV;
721 goto err_out;
722 }
723
724 /* start sending data */
725 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
726 TSC10_CMD_DATA1,
727 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
728 0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
729err_out:
730 kfree(buf);
731err_nobuf:
732 return ret;
733}
734
735
736static int dmc_tsc10_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
737{
738 dev->x = ((pkt[2] & 0x03) << 8) | pkt[1];
739 dev->y = ((pkt[4] & 0x03) << 8) | pkt[3];
740 dev->touch = pkt[0] & 0x01;
741
742 return 1;
743}
744#endif
745
746
747/*****************************************************************************
748 * IRTOUCH Part
749 */
750#ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
751static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
752{
753 dev->x = (pkt[3] << 8) | pkt[2];
754 dev->y = (pkt[5] << 8) | pkt[4];
755 dev->touch = (pkt[1] & 0x03) ? 1 : 0;
756
757 return 1;
758}
759#endif
760
761/*****************************************************************************
762 * ET&T TC5UH/TC4UM part
763 */
764#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
765static int tc45usb_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
766{
767 dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
768 dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
769 dev->touch = pkt[0] & 0x01;
770
771 return 1;
772}
773#endif
774
775/*****************************************************************************
776 * IdealTEK URTC1000 Part
777 */
778#ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
779#ifndef MULTI_PACKET
780#define MULTI_PACKET
781#endif
782static int idealtek_get_pkt_len(unsigned char *buf, int len)
783{
784 if (buf[0] & 0x80)
785 return 5;
786 if (buf[0] == 0x01)
787 return len;
788 return 0;
789}
790
791static int idealtek_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
792{
793 switch (pkt[0] & 0x98) {
794 case 0x88:
795 /* touch data in IdealTEK mode */
796 dev->x = (pkt[1] << 5) | (pkt[2] >> 2);
797 dev->y = (pkt[3] << 5) | (pkt[4] >> 2);
798 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
799 return 1;
800
801 case 0x98:
802 /* touch data in MT emulation mode */
803 dev->x = (pkt[2] << 5) | (pkt[1] >> 2);
804 dev->y = (pkt[4] << 5) | (pkt[3] >> 2);
805 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
806 return 1;
807
808 default:
809 return 0;
810 }
811}
812#endif
813
814/*****************************************************************************
815 * General Touch Part
816 */
817#ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
818static int general_touch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
819{
820 dev->x = (pkt[2] << 8) | pkt[1];
821 dev->y = (pkt[4] << 8) | pkt[3];
822 dev->press = pkt[5] & 0xff;
823 dev->touch = pkt[0] & 0x01;
824
825 return 1;
826}
827#endif
828
829/*****************************************************************************
830 * GoTop Part
831 */
832#ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
833static int gotop_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
834{
835 dev->x = ((pkt[1] & 0x38) << 4) | pkt[2];
836 dev->y = ((pkt[1] & 0x07) << 7) | pkt[3];
837 dev->touch = pkt[0] & 0x01;
838
839 return 1;
840}
841#endif
842
843/*****************************************************************************
844 * JASTEC Part
845 */
846#ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
847static int jastec_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
848{
849 dev->x = ((pkt[0] & 0x3f) << 6) | (pkt[2] & 0x3f);
850 dev->y = ((pkt[1] & 0x3f) << 6) | (pkt[3] & 0x3f);
851 dev->touch = (pkt[0] & 0x40) >> 6;
852
853 return 1;
854}
855#endif
856
857/*****************************************************************************
858 * Zytronic Part
859 */
860#ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
861static int zytronic_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
862{
863 struct usb_interface *intf = dev->interface;
864
865 switch (pkt[0]) {
866 case 0x3A: /* command response */
867 dev_dbg(&intf->dev, "%s: Command response %d\n", __func__, pkt[1]);
868 break;
869
870 case 0xC0: /* down */
871 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
872 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
873 dev->touch = 1;
874 dev_dbg(&intf->dev, "%s: down %d,%d\n", __func__, dev->x, dev->y);
875 return 1;
876
877 case 0x80: /* up */
878 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
879 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
880 dev->touch = 0;
881 dev_dbg(&intf->dev, "%s: up %d,%d\n", __func__, dev->x, dev->y);
882 return 1;
883
884 default:
885 dev_dbg(&intf->dev, "%s: Unknown return %d\n", __func__, pkt[0]);
886 break;
887 }
888
889 return 0;
890}
891#endif
892
893/*****************************************************************************
894 * NEXIO Part
895 */
896#ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
897
898#define NEXIO_TIMEOUT 5000
899#define NEXIO_BUFSIZE 1024
900#define NEXIO_THRESHOLD 50
901
902struct nexio_priv {
903 struct urb *ack;
904 unsigned char *ack_buf;
905};
906
907struct nexio_touch_packet {
908 u8 flags; /* 0xe1 = touch, 0xe1 = release */
909 __be16 data_len; /* total bytes of touch data */
910 __be16 x_len; /* bytes for X axis */
911 __be16 y_len; /* bytes for Y axis */
912 u8 data[];
913} __attribute__ ((packed));
914
915static unsigned char nexio_ack_pkt[2] = { 0xaa, 0x02 };
916static unsigned char nexio_init_pkt[4] = { 0x82, 0x04, 0x0a, 0x0f };
917
918static void nexio_ack_complete(struct urb *urb)
919{
920}
921
922static int nexio_alloc(struct usbtouch_usb *usbtouch)
923{
924 struct nexio_priv *priv;
925 int ret = -ENOMEM;
926
927 usbtouch->priv = kmalloc(sizeof(struct nexio_priv), GFP_KERNEL);
928 if (!usbtouch->priv)
929 goto out_buf;
930
931 priv = usbtouch->priv;
932
933 priv->ack_buf = kmemdup(nexio_ack_pkt, sizeof(nexio_ack_pkt),
934 GFP_KERNEL);
935 if (!priv->ack_buf)
936 goto err_priv;
937
938 priv->ack = usb_alloc_urb(0, GFP_KERNEL);
939 if (!priv->ack) {
940 dev_dbg(&usbtouch->interface->dev,
941 "%s - usb_alloc_urb failed: usbtouch->ack\n", __func__);
942 goto err_ack_buf;
943 }
944
945 return 0;
946
947err_ack_buf:
948 kfree(priv->ack_buf);
949err_priv:
950 kfree(priv);
951out_buf:
952 return ret;
953}
954
955static int nexio_init(struct usbtouch_usb *usbtouch)
956{
957 struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
958 struct usb_host_interface *interface = usbtouch->interface->cur_altsetting;
959 struct nexio_priv *priv = usbtouch->priv;
960 int ret = -ENOMEM;
961 int actual_len, i;
962 unsigned char *buf;
963 char *firmware_ver = NULL, *device_name = NULL;
964 int input_ep = 0, output_ep = 0;
965
966 /* find first input and output endpoint */
967 for (i = 0; i < interface->desc.bNumEndpoints; i++) {
968 if (!input_ep &&
969 usb_endpoint_dir_in(&interface->endpoint[i].desc))
970 input_ep = interface->endpoint[i].desc.bEndpointAddress;
971 if (!output_ep &&
972 usb_endpoint_dir_out(&interface->endpoint[i].desc))
973 output_ep = interface->endpoint[i].desc.bEndpointAddress;
974 }
975 if (!input_ep || !output_ep)
976 return -ENXIO;
977
978 buf = kmalloc(NEXIO_BUFSIZE, GFP_NOIO);
979 if (!buf)
980 goto out_buf;
981
982 /* two empty reads */
983 for (i = 0; i < 2; i++) {
984 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
985 buf, NEXIO_BUFSIZE, &actual_len,
986 NEXIO_TIMEOUT);
987 if (ret < 0)
988 goto out_buf;
989 }
990
991 /* send init command */
992 memcpy(buf, nexio_init_pkt, sizeof(nexio_init_pkt));
993 ret = usb_bulk_msg(dev, usb_sndbulkpipe(dev, output_ep),
994 buf, sizeof(nexio_init_pkt), &actual_len,
995 NEXIO_TIMEOUT);
996 if (ret < 0)
997 goto out_buf;
998
999 /* read replies */
1000 for (i = 0; i < 3; i++) {
1001 memset(buf, 0, NEXIO_BUFSIZE);
1002 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
1003 buf, NEXIO_BUFSIZE, &actual_len,
1004 NEXIO_TIMEOUT);
1005 if (ret < 0 || actual_len < 1 || buf[1] != actual_len)
1006 continue;
1007 switch (buf[0]) {
1008 case 0x83: /* firmware version */
1009 if (!firmware_ver)
1010 firmware_ver = kstrdup(&buf[2], GFP_NOIO);
1011 break;
1012 case 0x84: /* device name */
1013 if (!device_name)
1014 device_name = kstrdup(&buf[2], GFP_NOIO);
1015 break;
1016 }
1017 }
1018
1019 printk(KERN_INFO "Nexio device: %s, firmware version: %s\n",
1020 device_name, firmware_ver);
1021
1022 kfree(firmware_ver);
1023 kfree(device_name);
1024
1025 usb_fill_bulk_urb(priv->ack, dev, usb_sndbulkpipe(dev, output_ep),
1026 priv->ack_buf, sizeof(nexio_ack_pkt),
1027 nexio_ack_complete, usbtouch);
1028 ret = 0;
1029
1030out_buf:
1031 kfree(buf);
1032 return ret;
1033}
1034
1035static void nexio_exit(struct usbtouch_usb *usbtouch)
1036{
1037 struct nexio_priv *priv = usbtouch->priv;
1038
1039 usb_kill_urb(priv->ack);
1040 usb_free_urb(priv->ack);
1041 kfree(priv->ack_buf);
1042 kfree(priv);
1043}
1044
1045static int nexio_read_data(struct usbtouch_usb *usbtouch, unsigned char *pkt)
1046{
1047 struct device *dev = &usbtouch->interface->dev;
1048 struct nexio_touch_packet *packet = (void *) pkt;
1049 struct nexio_priv *priv = usbtouch->priv;
1050 unsigned int data_len = be16_to_cpu(packet->data_len);
1051 unsigned int x_len = be16_to_cpu(packet->x_len);
1052 unsigned int y_len = be16_to_cpu(packet->y_len);
1053 int x, y, begin_x, begin_y, end_x, end_y, w, h, ret;
1054
1055 /* got touch data? */
1056 if ((pkt[0] & 0xe0) != 0xe0)
1057 return 0;
1058
1059 if (data_len > 0xff)
1060 data_len -= 0x100;
1061 if (x_len > 0xff)
1062 x_len -= 0x80;
1063
1064 /* send ACK */
1065 ret = usb_submit_urb(priv->ack, GFP_ATOMIC);
1066 if (ret)
1067 dev_warn(dev, "Failed to submit ACK URB: %d\n", ret);
1068
1069 if (!usbtouch->type->max_xc) {
1070 usbtouch->type->max_xc = 2 * x_len;
1071 input_set_abs_params(usbtouch->input, ABS_X,
1072 0, usbtouch->type->max_xc, 0, 0);
1073 usbtouch->type->max_yc = 2 * y_len;
1074 input_set_abs_params(usbtouch->input, ABS_Y,
1075 0, usbtouch->type->max_yc, 0, 0);
1076 }
1077 /*
1078 * The device reports state of IR sensors on X and Y axes.
1079 * Each byte represents "darkness" percentage (0-100) of one element.
1080 * 17" touchscreen reports only 64 x 52 bytes so the resolution is low.
1081 * This also means that there's a limited multi-touch capability but
1082 * it's disabled (and untested) here as there's no X driver for that.
1083 */
1084 begin_x = end_x = begin_y = end_y = -1;
1085 for (x = 0; x < x_len; x++) {
1086 if (begin_x == -1 && packet->data[x] > NEXIO_THRESHOLD) {
1087 begin_x = x;
1088 continue;
1089 }
1090 if (end_x == -1 && begin_x != -1 && packet->data[x] < NEXIO_THRESHOLD) {
1091 end_x = x - 1;
1092 for (y = x_len; y < data_len; y++) {
1093 if (begin_y == -1 && packet->data[y] > NEXIO_THRESHOLD) {
1094 begin_y = y - x_len;
1095 continue;
1096 }
1097 if (end_y == -1 &&
1098 begin_y != -1 && packet->data[y] < NEXIO_THRESHOLD) {
1099 end_y = y - 1 - x_len;
1100 w = end_x - begin_x;
1101 h = end_y - begin_y;
1102#if 0
1103 /* multi-touch */
1104 input_report_abs(usbtouch->input,
1105 ABS_MT_TOUCH_MAJOR, max(w,h));
1106 input_report_abs(usbtouch->input,
1107 ABS_MT_TOUCH_MINOR, min(x,h));
1108 input_report_abs(usbtouch->input,
1109 ABS_MT_POSITION_X, 2*begin_x+w);
1110 input_report_abs(usbtouch->input,
1111 ABS_MT_POSITION_Y, 2*begin_y+h);
1112 input_report_abs(usbtouch->input,
1113 ABS_MT_ORIENTATION, w > h);
1114 input_mt_sync(usbtouch->input);
1115#endif
1116 /* single touch */
1117 usbtouch->x = 2 * begin_x + w;
1118 usbtouch->y = 2 * begin_y + h;
1119 usbtouch->touch = packet->flags & 0x01;
1120 begin_y = end_y = -1;
1121 return 1;
1122 }
1123 }
1124 begin_x = end_x = -1;
1125 }
1126
1127 }
1128 return 0;
1129}
1130#endif
1131
1132
1133/*****************************************************************************
1134 * ELO part
1135 */
1136
1137#ifdef CONFIG_TOUCHSCREEN_USB_ELO
1138
1139static int elo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
1140{
1141 dev->x = (pkt[3] << 8) | pkt[2];
1142 dev->y = (pkt[5] << 8) | pkt[4];
1143 dev->touch = pkt[6] > 0;
1144 dev->press = pkt[6];
1145
1146 return 1;
1147}
1148#endif
1149
1150
1151/*****************************************************************************
1152 * the different device descriptors
1153 */
1154#ifdef MULTI_PACKET
1155static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1156 unsigned char *pkt, int len);
1157#endif
1158
1159static struct usbtouch_device_info usbtouch_dev_info[] = {
1160#ifdef CONFIG_TOUCHSCREEN_USB_ELO
1161 [DEVTYPE_ELO] = {
1162 .min_xc = 0x0,
1163 .max_xc = 0x0fff,
1164 .min_yc = 0x0,
1165 .max_yc = 0x0fff,
1166 .max_press = 0xff,
1167 .rept_size = 8,
1168 .read_data = elo_read_data,
1169 },
1170#endif
1171
1172#ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
1173 [DEVTYPE_EGALAX] = {
1174 .min_xc = 0x0,
1175 .max_xc = 0x07ff,
1176 .min_yc = 0x0,
1177 .max_yc = 0x07ff,
1178 .rept_size = 16,
1179 .process_pkt = usbtouch_process_multi,
1180 .get_pkt_len = egalax_get_pkt_len,
1181 .read_data = egalax_read_data,
1182 .init = egalax_init,
1183 },
1184#endif
1185
1186#ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
1187 [DEVTYPE_PANJIT] = {
1188 .min_xc = 0x0,
1189 .max_xc = 0x0fff,
1190 .min_yc = 0x0,
1191 .max_yc = 0x0fff,
1192 .rept_size = 8,
1193 .read_data = panjit_read_data,
1194 },
1195#endif
1196
1197#ifdef CONFIG_TOUCHSCREEN_USB_3M
1198 [DEVTYPE_3M] = {
1199 .min_xc = 0x0,
1200 .max_xc = 0x4000,
1201 .min_yc = 0x0,
1202 .max_yc = 0x4000,
1203 .rept_size = 11,
1204 .read_data = mtouch_read_data,
1205 .alloc = mtouch_alloc,
1206 .init = mtouch_init,
1207 .exit = mtouch_exit,
1208 },
1209#endif
1210
1211#ifdef CONFIG_TOUCHSCREEN_USB_ITM
1212 [DEVTYPE_ITM] = {
1213 .min_xc = 0x0,
1214 .max_xc = 0x0fff,
1215 .min_yc = 0x0,
1216 .max_yc = 0x0fff,
1217 .max_press = 0xff,
1218 .rept_size = 8,
1219 .read_data = itm_read_data,
1220 },
1221#endif
1222
1223#ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
1224 [DEVTYPE_ETURBO] = {
1225 .min_xc = 0x0,
1226 .max_xc = 0x07ff,
1227 .min_yc = 0x0,
1228 .max_yc = 0x07ff,
1229 .rept_size = 8,
1230 .process_pkt = usbtouch_process_multi,
1231 .get_pkt_len = eturbo_get_pkt_len,
1232 .read_data = eturbo_read_data,
1233 },
1234#endif
1235
1236#ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
1237 [DEVTYPE_GUNZE] = {
1238 .min_xc = 0x0,
1239 .max_xc = 0x0fff,
1240 .min_yc = 0x0,
1241 .max_yc = 0x0fff,
1242 .rept_size = 4,
1243 .read_data = gunze_read_data,
1244 },
1245#endif
1246
1247#ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
1248 [DEVTYPE_DMC_TSC10] = {
1249 .min_xc = 0x0,
1250 .max_xc = 0x03ff,
1251 .min_yc = 0x0,
1252 .max_yc = 0x03ff,
1253 .rept_size = 5,
1254 .init = dmc_tsc10_init,
1255 .read_data = dmc_tsc10_read_data,
1256 },
1257#endif
1258
1259#ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
1260 [DEVTYPE_IRTOUCH] = {
1261 .min_xc = 0x0,
1262 .max_xc = 0x0fff,
1263 .min_yc = 0x0,
1264 .max_yc = 0x0fff,
1265 .rept_size = 8,
1266 .read_data = irtouch_read_data,
1267 },
1268
1269 [DEVTYPE_IRTOUCH_HIRES] = {
1270 .min_xc = 0x0,
1271 .max_xc = 0x7fff,
1272 .min_yc = 0x0,
1273 .max_yc = 0x7fff,
1274 .rept_size = 8,
1275 .read_data = irtouch_read_data,
1276 },
1277#endif
1278
1279#ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
1280 [DEVTYPE_IDEALTEK] = {
1281 .min_xc = 0x0,
1282 .max_xc = 0x0fff,
1283 .min_yc = 0x0,
1284 .max_yc = 0x0fff,
1285 .rept_size = 8,
1286 .process_pkt = usbtouch_process_multi,
1287 .get_pkt_len = idealtek_get_pkt_len,
1288 .read_data = idealtek_read_data,
1289 },
1290#endif
1291
1292#ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
1293 [DEVTYPE_GENERAL_TOUCH] = {
1294 .min_xc = 0x0,
1295 .max_xc = 0x7fff,
1296 .min_yc = 0x0,
1297 .max_yc = 0x7fff,
1298 .rept_size = 7,
1299 .read_data = general_touch_read_data,
1300 },
1301#endif
1302
1303#ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
1304 [DEVTYPE_GOTOP] = {
1305 .min_xc = 0x0,
1306 .max_xc = 0x03ff,
1307 .min_yc = 0x0,
1308 .max_yc = 0x03ff,
1309 .rept_size = 4,
1310 .read_data = gotop_read_data,
1311 },
1312#endif
1313
1314#ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
1315 [DEVTYPE_JASTEC] = {
1316 .min_xc = 0x0,
1317 .max_xc = 0x0fff,
1318 .min_yc = 0x0,
1319 .max_yc = 0x0fff,
1320 .rept_size = 4,
1321 .read_data = jastec_read_data,
1322 },
1323#endif
1324
1325#ifdef CONFIG_TOUCHSCREEN_USB_E2I
1326 [DEVTYPE_E2I] = {
1327 .min_xc = 0x0,
1328 .max_xc = 0x7fff,
1329 .min_yc = 0x0,
1330 .max_yc = 0x7fff,
1331 .rept_size = 6,
1332 .init = e2i_init,
1333 .read_data = e2i_read_data,
1334 },
1335#endif
1336
1337#ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
1338 [DEVTYPE_ZYTRONIC] = {
1339 .min_xc = 0x0,
1340 .max_xc = 0x03ff,
1341 .min_yc = 0x0,
1342 .max_yc = 0x03ff,
1343 .rept_size = 5,
1344 .read_data = zytronic_read_data,
1345 .irq_always = true,
1346 },
1347#endif
1348
1349#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
1350 [DEVTYPE_TC45USB] = {
1351 .min_xc = 0x0,
1352 .max_xc = 0x0fff,
1353 .min_yc = 0x0,
1354 .max_yc = 0x0fff,
1355 .rept_size = 5,
1356 .read_data = tc45usb_read_data,
1357 },
1358#endif
1359
1360#ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
1361 [DEVTYPE_NEXIO] = {
1362 .rept_size = 1024,
1363 .irq_always = true,
1364 .read_data = nexio_read_data,
1365 .alloc = nexio_alloc,
1366 .init = nexio_init,
1367 .exit = nexio_exit,
1368 },
1369#endif
1370#ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
1371 [DEVTYPE_ETOUCH] = {
1372 .min_xc = 0x0,
1373 .max_xc = 0x07ff,
1374 .min_yc = 0x0,
1375 .max_yc = 0x07ff,
1376 .rept_size = 16,
1377 .process_pkt = usbtouch_process_multi,
1378 .get_pkt_len = etouch_get_pkt_len,
1379 .read_data = etouch_read_data,
1380 },
1381#endif
1382};
1383
1384
1385/*****************************************************************************
1386 * Generic Part
1387 */
1388static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
1389 unsigned char *pkt, int len)
1390{
1391 struct usbtouch_device_info *type = usbtouch->type;
1392
1393 if (!type->read_data(usbtouch, pkt))
1394 return;
1395
1396 input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch);
1397
1398 if (swap_xy) {
1399 input_report_abs(usbtouch->input, ABS_X, usbtouch->y);
1400 input_report_abs(usbtouch->input, ABS_Y, usbtouch->x);
1401 } else {
1402 input_report_abs(usbtouch->input, ABS_X, usbtouch->x);
1403 input_report_abs(usbtouch->input, ABS_Y, usbtouch->y);
1404 }
1405 if (type->max_press)
1406 input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press);
1407 input_sync(usbtouch->input);
1408}
1409
1410
1411#ifdef MULTI_PACKET
1412static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1413 unsigned char *pkt, int len)
1414{
1415 unsigned char *buffer;
1416 int pkt_len, pos, buf_len, tmp;
1417
1418 /* process buffer */
1419 if (unlikely(usbtouch->buf_len)) {
1420 /* try to get size */
1421 pkt_len = usbtouch->type->get_pkt_len(
1422 usbtouch->buffer, usbtouch->buf_len);
1423
1424 /* drop? */
1425 if (unlikely(!pkt_len))
1426 goto out_flush_buf;
1427
1428 /* need to append -pkt_len bytes before able to get size */
1429 if (unlikely(pkt_len < 0)) {
1430 int append = -pkt_len;
1431 if (unlikely(append > len))
1432 append = len;
1433 if (usbtouch->buf_len + append >= usbtouch->type->rept_size)
1434 goto out_flush_buf;
1435 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append);
1436 usbtouch->buf_len += append;
1437
1438 pkt_len = usbtouch->type->get_pkt_len(
1439 usbtouch->buffer, usbtouch->buf_len);
1440 if (pkt_len < 0)
1441 return;
1442 }
1443
1444 /* append */
1445 tmp = pkt_len - usbtouch->buf_len;
1446 if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size)
1447 goto out_flush_buf;
1448 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp);
1449 usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len);
1450
1451 buffer = pkt + tmp;
1452 buf_len = len - tmp;
1453 } else {
1454 buffer = pkt;
1455 buf_len = len;
1456 }
1457
1458 /* loop over the received packet, process */
1459 pos = 0;
1460 while (pos < buf_len) {
1461 /* get packet len */
1462 pkt_len = usbtouch->type->get_pkt_len(buffer + pos,
1463 buf_len - pos);
1464
1465 /* unknown packet: skip one byte */
1466 if (unlikely(!pkt_len)) {
1467 pos++;
1468 continue;
1469 }
1470
1471 /* full packet: process */
1472 if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) {
1473 usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len);
1474 } else {
1475 /* incomplete packet: save in buffer */
1476 memcpy(usbtouch->buffer, buffer + pos, buf_len - pos);
1477 usbtouch->buf_len = buf_len - pos;
1478 return;
1479 }
1480 pos += pkt_len;
1481 }
1482
1483out_flush_buf:
1484 usbtouch->buf_len = 0;
1485 return;
1486}
1487#endif
1488
1489
1490static void usbtouch_irq(struct urb *urb)
1491{
1492 struct usbtouch_usb *usbtouch = urb->context;
1493 struct device *dev = &usbtouch->interface->dev;
1494 int retval;
1495
1496 switch (urb->status) {
1497 case 0:
1498 /* success */
1499 break;
1500 case -ETIME:
1501 /* this urb is timing out */
1502 dev_dbg(dev,
1503 "%s - urb timed out - was the device unplugged?\n",
1504 __func__);
1505 return;
1506 case -ECONNRESET:
1507 case -ENOENT:
1508 case -ESHUTDOWN:
1509 case -EPIPE:
1510 /* this urb is terminated, clean up */
1511 dev_dbg(dev, "%s - urb shutting down with status: %d\n",
1512 __func__, urb->status);
1513 return;
1514 default:
1515 dev_dbg(dev, "%s - nonzero urb status received: %d\n",
1516 __func__, urb->status);
1517 goto exit;
1518 }
1519
1520 usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length);
1521
1522exit:
1523 usb_mark_last_busy(interface_to_usbdev(usbtouch->interface));
1524 retval = usb_submit_urb(urb, GFP_ATOMIC);
1525 if (retval)
1526 dev_err(dev, "%s - usb_submit_urb failed with result: %d\n",
1527 __func__, retval);
1528}
1529
1530static int usbtouch_open(struct input_dev *input)
1531{
1532 struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1533 int r;
1534
1535 usbtouch->irq->dev = interface_to_usbdev(usbtouch->interface);
1536
1537 r = usb_autopm_get_interface(usbtouch->interface) ? -EIO : 0;
1538 if (r < 0)
1539 goto out;
1540
1541 mutex_lock(&usbtouch->pm_mutex);
1542 if (!usbtouch->type->irq_always) {
1543 if (usb_submit_urb(usbtouch->irq, GFP_KERNEL)) {
1544 r = -EIO;
1545 goto out_put;
1546 }
1547 }
1548
1549 usbtouch->interface->needs_remote_wakeup = 1;
1550 usbtouch->is_open = true;
1551out_put:
1552 mutex_unlock(&usbtouch->pm_mutex);
1553 usb_autopm_put_interface(usbtouch->interface);
1554out:
1555 return r;
1556}
1557
1558static void usbtouch_close(struct input_dev *input)
1559{
1560 struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1561 int r;
1562
1563 mutex_lock(&usbtouch->pm_mutex);
1564 if (!usbtouch->type->irq_always)
1565 usb_kill_urb(usbtouch->irq);
1566 usbtouch->is_open = false;
1567 mutex_unlock(&usbtouch->pm_mutex);
1568
1569 r = usb_autopm_get_interface(usbtouch->interface);
1570 usbtouch->interface->needs_remote_wakeup = 0;
1571 if (!r)
1572 usb_autopm_put_interface(usbtouch->interface);
1573}
1574
1575static int usbtouch_suspend
1576(struct usb_interface *intf, pm_message_t message)
1577{
1578 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1579
1580 usb_kill_urb(usbtouch->irq);
1581
1582 return 0;
1583}
1584
1585static int usbtouch_resume(struct usb_interface *intf)
1586{
1587 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1588 int result = 0;
1589
1590 mutex_lock(&usbtouch->pm_mutex);
1591 if (usbtouch->is_open || usbtouch->type->irq_always)
1592 result = usb_submit_urb(usbtouch->irq, GFP_NOIO);
1593 mutex_unlock(&usbtouch->pm_mutex);
1594
1595 return result;
1596}
1597
1598static int usbtouch_reset_resume(struct usb_interface *intf)
1599{
1600 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1601 int err = 0;
1602
1603 /* reinit the device */
1604 if (usbtouch->type->init) {
1605 err = usbtouch->type->init(usbtouch);
1606 if (err) {
1607 dev_dbg(&intf->dev,
1608 "%s - type->init() failed, err: %d\n",
1609 __func__, err);
1610 return err;
1611 }
1612 }
1613
1614 /* restart IO if needed */
1615 mutex_lock(&usbtouch->pm_mutex);
1616 if (usbtouch->is_open)
1617 err = usb_submit_urb(usbtouch->irq, GFP_NOIO);
1618 mutex_unlock(&usbtouch->pm_mutex);
1619
1620 return err;
1621}
1622
1623static void usbtouch_free_buffers(struct usb_device *udev,
1624 struct usbtouch_usb *usbtouch)
1625{
1626 usb_free_coherent(udev, usbtouch->data_size,
1627 usbtouch->data, usbtouch->data_dma);
1628 kfree(usbtouch->buffer);
1629}
1630
1631static struct usb_endpoint_descriptor *
1632usbtouch_get_input_endpoint(struct usb_host_interface *interface)
1633{
1634 int i;
1635
1636 for (i = 0; i < interface->desc.bNumEndpoints; i++)
1637 if (usb_endpoint_dir_in(&interface->endpoint[i].desc))
1638 return &interface->endpoint[i].desc;
1639
1640 return NULL;
1641}
1642
1643static int usbtouch_probe(struct usb_interface *intf,
1644 const struct usb_device_id *id)
1645{
1646 struct usbtouch_usb *usbtouch;
1647 struct input_dev *input_dev;
1648 struct usb_endpoint_descriptor *endpoint;
1649 struct usb_device *udev = interface_to_usbdev(intf);
1650 struct usbtouch_device_info *type;
1651 int err = -ENOMEM;
1652
1653 /* some devices are ignored */
1654 if (id->driver_info == DEVTYPE_IGNORE)
1655 return -ENODEV;
1656
1657 if (id->driver_info >= ARRAY_SIZE(usbtouch_dev_info))
1658 return -ENODEV;
1659
1660 endpoint = usbtouch_get_input_endpoint(intf->cur_altsetting);
1661 if (!endpoint)
1662 return -ENXIO;
1663
1664 usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL);
1665 input_dev = input_allocate_device();
1666 if (!usbtouch || !input_dev)
1667 goto out_free;
1668
1669 mutex_init(&usbtouch->pm_mutex);
1670
1671 type = &usbtouch_dev_info[id->driver_info];
1672 usbtouch->type = type;
1673 if (!type->process_pkt)
1674 type->process_pkt = usbtouch_process_pkt;
1675
1676 usbtouch->data_size = type->rept_size;
1677 if (type->get_pkt_len) {
1678 /*
1679 * When dealing with variable-length packets we should
1680 * not request more than wMaxPacketSize bytes at once
1681 * as we do not know if there is more data coming or
1682 * we filled exactly wMaxPacketSize bytes and there is
1683 * nothing else.
1684 */
1685 usbtouch->data_size = min(usbtouch->data_size,
1686 usb_endpoint_maxp(endpoint));
1687 }
1688
1689 usbtouch->data = usb_alloc_coherent(udev, usbtouch->data_size,
1690 GFP_KERNEL, &usbtouch->data_dma);
1691 if (!usbtouch->data)
1692 goto out_free;
1693
1694 if (type->get_pkt_len) {
1695 usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL);
1696 if (!usbtouch->buffer)
1697 goto out_free_buffers;
1698 }
1699
1700 usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
1701 if (!usbtouch->irq) {
1702 dev_dbg(&intf->dev,
1703 "%s - usb_alloc_urb failed: usbtouch->irq\n", __func__);
1704 goto out_free_buffers;
1705 }
1706
1707 usbtouch->interface = intf;
1708 usbtouch->input = input_dev;
1709
1710 if (udev->manufacturer)
1711 strscpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name));
1712
1713 if (udev->product) {
1714 if (udev->manufacturer)
1715 strlcat(usbtouch->name, " ", sizeof(usbtouch->name));
1716 strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name));
1717 }
1718
1719 if (!strlen(usbtouch->name))
1720 snprintf(usbtouch->name, sizeof(usbtouch->name),
1721 "USB Touchscreen %04x:%04x",
1722 le16_to_cpu(udev->descriptor.idVendor),
1723 le16_to_cpu(udev->descriptor.idProduct));
1724
1725 usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys));
1726 strlcat(usbtouch->phys, "/input0", sizeof(usbtouch->phys));
1727
1728 input_dev->name = usbtouch->name;
1729 input_dev->phys = usbtouch->phys;
1730 usb_to_input_id(udev, &input_dev->id);
1731 input_dev->dev.parent = &intf->dev;
1732
1733 input_set_drvdata(input_dev, usbtouch);
1734
1735 input_dev->open = usbtouch_open;
1736 input_dev->close = usbtouch_close;
1737
1738 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
1739 input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
1740 input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0);
1741 input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0);
1742 if (type->max_press)
1743 input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press,
1744 type->max_press, 0, 0);
1745
1746 if (usb_endpoint_type(endpoint) == USB_ENDPOINT_XFER_INT)
1747 usb_fill_int_urb(usbtouch->irq, udev,
1748 usb_rcvintpipe(udev, endpoint->bEndpointAddress),
1749 usbtouch->data, usbtouch->data_size,
1750 usbtouch_irq, usbtouch, endpoint->bInterval);
1751 else
1752 usb_fill_bulk_urb(usbtouch->irq, udev,
1753 usb_rcvbulkpipe(udev, endpoint->bEndpointAddress),
1754 usbtouch->data, usbtouch->data_size,
1755 usbtouch_irq, usbtouch);
1756
1757 usbtouch->irq->dev = udev;
1758 usbtouch->irq->transfer_dma = usbtouch->data_dma;
1759 usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1760
1761 /* device specific allocations */
1762 if (type->alloc) {
1763 err = type->alloc(usbtouch);
1764 if (err) {
1765 dev_dbg(&intf->dev,
1766 "%s - type->alloc() failed, err: %d\n",
1767 __func__, err);
1768 goto out_free_urb;
1769 }
1770 }
1771
1772 /* device specific initialisation*/
1773 if (type->init) {
1774 err = type->init(usbtouch);
1775 if (err) {
1776 dev_dbg(&intf->dev,
1777 "%s - type->init() failed, err: %d\n",
1778 __func__, err);
1779 goto out_do_exit;
1780 }
1781 }
1782
1783 err = input_register_device(usbtouch->input);
1784 if (err) {
1785 dev_dbg(&intf->dev,
1786 "%s - input_register_device failed, err: %d\n",
1787 __func__, err);
1788 goto out_do_exit;
1789 }
1790
1791 usb_set_intfdata(intf, usbtouch);
1792
1793 if (usbtouch->type->irq_always) {
1794 /* this can't fail */
1795 usb_autopm_get_interface(intf);
1796 err = usb_submit_urb(usbtouch->irq, GFP_KERNEL);
1797 if (err) {
1798 usb_autopm_put_interface(intf);
1799 dev_err(&intf->dev,
1800 "%s - usb_submit_urb failed with result: %d\n",
1801 __func__, err);
1802 goto out_unregister_input;
1803 }
1804 }
1805
1806 return 0;
1807
1808out_unregister_input:
1809 input_unregister_device(input_dev);
1810 input_dev = NULL;
1811out_do_exit:
1812 if (type->exit)
1813 type->exit(usbtouch);
1814out_free_urb:
1815 usb_free_urb(usbtouch->irq);
1816out_free_buffers:
1817 usbtouch_free_buffers(udev, usbtouch);
1818out_free:
1819 input_free_device(input_dev);
1820 kfree(usbtouch);
1821 return err;
1822}
1823
1824static void usbtouch_disconnect(struct usb_interface *intf)
1825{
1826 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1827
1828 if (!usbtouch)
1829 return;
1830
1831 dev_dbg(&intf->dev,
1832 "%s - usbtouch is initialized, cleaning up\n", __func__);
1833
1834 usb_set_intfdata(intf, NULL);
1835 /* this will stop IO via close */
1836 input_unregister_device(usbtouch->input);
1837 usb_free_urb(usbtouch->irq);
1838 if (usbtouch->type->exit)
1839 usbtouch->type->exit(usbtouch);
1840 usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch);
1841 kfree(usbtouch);
1842}
1843
1844MODULE_DEVICE_TABLE(usb, usbtouch_devices);
1845
1846static struct usb_driver usbtouch_driver = {
1847 .name = "usbtouchscreen",
1848 .probe = usbtouch_probe,
1849 .disconnect = usbtouch_disconnect,
1850 .suspend = usbtouch_suspend,
1851 .resume = usbtouch_resume,
1852 .reset_resume = usbtouch_reset_resume,
1853 .id_table = usbtouch_devices,
1854 .supports_autosuspend = 1,
1855};
1856
1857module_usb_driver(usbtouch_driver);
1858
1859MODULE_AUTHOR("Daniel Ritz <daniel.ritz@gmx.ch>");
1860MODULE_DESCRIPTION("USB Touchscreen Driver");
1861MODULE_LICENSE("GPL");
1862
1863MODULE_ALIAS("touchkitusb");
1864MODULE_ALIAS("itmtouch");
1865MODULE_ALIAS("mtouchusb");
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 * - Elo TouchSystems 2700 IntelliTouch
20 * - EasyTouch USB Dual/Multi touch controller from Data Modul
21 *
22 * Copyright (C) 2004-2007 by Daniel Ritz <daniel.ritz@gmx.ch>
23 * Copyright (C) by Todd E. Johnson (mtouchusb.c)
24 *
25 * This program is free software; you can redistribute it and/or
26 * modify it under the terms of the GNU General Public License as
27 * published by the Free Software Foundation; either version 2 of the
28 * License, or (at your option) any later version.
29 *
30 * This program is distributed in the hope that it will be useful, but
31 * WITHOUT ANY WARRANTY; without even the implied warranty of
32 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
33 * General Public License for more details.
34 *
35 * You should have received a copy of the GNU General Public License
36 * along with this program; if not, write to the Free Software
37 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
38 *
39 * Driver is based on touchkitusb.c
40 * - ITM parts are from itmtouch.c
41 * - 3M parts are from mtouchusb.c
42 * - PanJit parts are from an unmerged driver by Lanslott Gish
43 * - DMC TSC 10/25 are from Holger Schurig, with ideas from an unmerged
44 * driver from Marius Vollmer
45 *
46 *****************************************************************************/
47
48//#define DEBUG
49
50#include <linux/kernel.h>
51#include <linux/slab.h>
52#include <linux/input.h>
53#include <linux/module.h>
54#include <linux/usb.h>
55#include <linux/usb/input.h>
56#include <linux/hid.h>
57
58
59#define DRIVER_VERSION "v0.6"
60#define DRIVER_AUTHOR "Daniel Ritz <daniel.ritz@gmx.ch>"
61#define DRIVER_DESC "USB Touchscreen Driver"
62
63static bool swap_xy;
64module_param(swap_xy, bool, 0644);
65MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");
66
67static bool hwcalib_xy;
68module_param(hwcalib_xy, bool, 0644);
69MODULE_PARM_DESC(hwcalib_xy, "If set hw-calibrated X/Y are used if available");
70
71/* device specifc data/functions */
72struct usbtouch_usb;
73struct usbtouch_device_info {
74 int min_xc, max_xc;
75 int min_yc, max_yc;
76 int min_press, max_press;
77 int rept_size;
78
79 /*
80 * Always service the USB devices irq not just when the input device is
81 * open. This is useful when devices have a watchdog which prevents us
82 * from periodically polling the device. Leave this unset unless your
83 * touchscreen device requires it, as it does consume more of the USB
84 * bandwidth.
85 */
86 bool irq_always;
87
88 void (*process_pkt) (struct usbtouch_usb *usbtouch, unsigned char *pkt, int len);
89
90 /*
91 * used to get the packet len. possible return values:
92 * > 0: packet len
93 * = 0: skip one byte
94 * < 0: -return value more bytes needed
95 */
96 int (*get_pkt_len) (unsigned char *pkt, int len);
97
98 int (*read_data) (struct usbtouch_usb *usbtouch, unsigned char *pkt);
99 int (*alloc) (struct usbtouch_usb *usbtouch);
100 int (*init) (struct usbtouch_usb *usbtouch);
101 void (*exit) (struct usbtouch_usb *usbtouch);
102};
103
104/* a usbtouch device */
105struct usbtouch_usb {
106 unsigned char *data;
107 dma_addr_t data_dma;
108 int data_size;
109 unsigned char *buffer;
110 int buf_len;
111 struct urb *irq;
112 struct usb_interface *interface;
113 struct input_dev *input;
114 struct usbtouch_device_info *type;
115 char name[128];
116 char phys[64];
117 void *priv;
118
119 int x, y;
120 int touch, press;
121};
122
123
124/* device types */
125enum {
126 DEVTYPE_IGNORE = -1,
127 DEVTYPE_EGALAX,
128 DEVTYPE_PANJIT,
129 DEVTYPE_3M,
130 DEVTYPE_ITM,
131 DEVTYPE_ETURBO,
132 DEVTYPE_GUNZE,
133 DEVTYPE_DMC_TSC10,
134 DEVTYPE_IRTOUCH,
135 DEVTYPE_IRTOUCH_HIRES,
136 DEVTYPE_IDEALTEK,
137 DEVTYPE_GENERAL_TOUCH,
138 DEVTYPE_GOTOP,
139 DEVTYPE_JASTEC,
140 DEVTYPE_E2I,
141 DEVTYPE_ZYTRONIC,
142 DEVTYPE_TC45USB,
143 DEVTYPE_NEXIO,
144 DEVTYPE_ELO,
145 DEVTYPE_ETOUCH,
146};
147
148#define USB_DEVICE_HID_CLASS(vend, prod) \
149 .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS \
150 | USB_DEVICE_ID_MATCH_DEVICE, \
151 .idVendor = (vend), \
152 .idProduct = (prod), \
153 .bInterfaceClass = USB_INTERFACE_CLASS_HID
154
155static const struct usb_device_id usbtouch_devices[] = {
156#ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
157 /* ignore the HID capable devices, handled by usbhid */
158 {USB_DEVICE_HID_CLASS(0x0eef, 0x0001), .driver_info = DEVTYPE_IGNORE},
159 {USB_DEVICE_HID_CLASS(0x0eef, 0x0002), .driver_info = DEVTYPE_IGNORE},
160
161 /* normal device IDs */
162 {USB_DEVICE(0x3823, 0x0001), .driver_info = DEVTYPE_EGALAX},
163 {USB_DEVICE(0x3823, 0x0002), .driver_info = DEVTYPE_EGALAX},
164 {USB_DEVICE(0x0123, 0x0001), .driver_info = DEVTYPE_EGALAX},
165 {USB_DEVICE(0x0eef, 0x0001), .driver_info = DEVTYPE_EGALAX},
166 {USB_DEVICE(0x0eef, 0x0002), .driver_info = DEVTYPE_EGALAX},
167 {USB_DEVICE(0x1234, 0x0001), .driver_info = DEVTYPE_EGALAX},
168 {USB_DEVICE(0x1234, 0x0002), .driver_info = DEVTYPE_EGALAX},
169#endif
170
171#ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
172 {USB_DEVICE(0x134c, 0x0001), .driver_info = DEVTYPE_PANJIT},
173 {USB_DEVICE(0x134c, 0x0002), .driver_info = DEVTYPE_PANJIT},
174 {USB_DEVICE(0x134c, 0x0003), .driver_info = DEVTYPE_PANJIT},
175 {USB_DEVICE(0x134c, 0x0004), .driver_info = DEVTYPE_PANJIT},
176#endif
177
178#ifdef CONFIG_TOUCHSCREEN_USB_3M
179 {USB_DEVICE(0x0596, 0x0001), .driver_info = DEVTYPE_3M},
180#endif
181
182#ifdef CONFIG_TOUCHSCREEN_USB_ITM
183 {USB_DEVICE(0x0403, 0xf9e9), .driver_info = DEVTYPE_ITM},
184 {USB_DEVICE(0x16e3, 0xf9e9), .driver_info = DEVTYPE_ITM},
185#endif
186
187#ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
188 {USB_DEVICE(0x1234, 0x5678), .driver_info = DEVTYPE_ETURBO},
189#endif
190
191#ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
192 {USB_DEVICE(0x0637, 0x0001), .driver_info = DEVTYPE_GUNZE},
193#endif
194
195#ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
196 {USB_DEVICE(0x0afa, 0x03e8), .driver_info = DEVTYPE_DMC_TSC10},
197#endif
198
199#ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
200 {USB_DEVICE(0x595a, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
201 {USB_DEVICE(0x6615, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
202 {USB_DEVICE(0x6615, 0x0012), .driver_info = DEVTYPE_IRTOUCH_HIRES},
203#endif
204
205#ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
206 {USB_DEVICE(0x1391, 0x1000), .driver_info = DEVTYPE_IDEALTEK},
207#endif
208
209#ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
210 {USB_DEVICE(0x0dfc, 0x0001), .driver_info = DEVTYPE_GENERAL_TOUCH},
211#endif
212
213#ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
214 {USB_DEVICE(0x08f2, 0x007f), .driver_info = DEVTYPE_GOTOP},
215 {USB_DEVICE(0x08f2, 0x00ce), .driver_info = DEVTYPE_GOTOP},
216 {USB_DEVICE(0x08f2, 0x00f4), .driver_info = DEVTYPE_GOTOP},
217#endif
218
219#ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
220 {USB_DEVICE(0x0f92, 0x0001), .driver_info = DEVTYPE_JASTEC},
221#endif
222
223#ifdef CONFIG_TOUCHSCREEN_USB_E2I
224 {USB_DEVICE(0x1ac7, 0x0001), .driver_info = DEVTYPE_E2I},
225#endif
226
227#ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
228 {USB_DEVICE(0x14c8, 0x0003), .driver_info = DEVTYPE_ZYTRONIC},
229#endif
230
231#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
232 /* TC5UH */
233 {USB_DEVICE(0x0664, 0x0309), .driver_info = DEVTYPE_TC45USB},
234 /* TC4UM */
235 {USB_DEVICE(0x0664, 0x0306), .driver_info = DEVTYPE_TC45USB},
236#endif
237
238#ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
239 /* data interface only */
240 {USB_DEVICE_AND_INTERFACE_INFO(0x10f0, 0x2002, 0x0a, 0x00, 0x00),
241 .driver_info = DEVTYPE_NEXIO},
242 {USB_DEVICE_AND_INTERFACE_INFO(0x1870, 0x0001, 0x0a, 0x00, 0x00),
243 .driver_info = DEVTYPE_NEXIO},
244#endif
245
246#ifdef CONFIG_TOUCHSCREEN_USB_ELO
247 {USB_DEVICE(0x04e7, 0x0020), .driver_info = DEVTYPE_ELO},
248#endif
249
250#ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
251 {USB_DEVICE(0x7374, 0x0001), .driver_info = DEVTYPE_ETOUCH},
252#endif
253
254 {}
255};
256
257
258/*****************************************************************************
259 * e2i Part
260 */
261
262#ifdef CONFIG_TOUCHSCREEN_USB_E2I
263static int e2i_init(struct usbtouch_usb *usbtouch)
264{
265 int ret;
266 struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
267
268 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
269 0x01, 0x02, 0x0000, 0x0081,
270 NULL, 0, USB_CTRL_SET_TIMEOUT);
271
272 dev_dbg(&usbtouch->interface->dev,
273 "%s - usb_control_msg - E2I_RESET - bytes|err: %d\n",
274 __func__, ret);
275 return ret;
276}
277
278static int e2i_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
279{
280 int tmp = (pkt[0] << 8) | pkt[1];
281 dev->x = (pkt[2] << 8) | pkt[3];
282 dev->y = (pkt[4] << 8) | pkt[5];
283
284 tmp = tmp - 0xA000;
285 dev->touch = (tmp > 0);
286 dev->press = (tmp > 0 ? tmp : 0);
287
288 return 1;
289}
290#endif
291
292
293/*****************************************************************************
294 * eGalax part
295 */
296
297#ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
298
299#ifndef MULTI_PACKET
300#define MULTI_PACKET
301#endif
302
303#define EGALAX_PKT_TYPE_MASK 0xFE
304#define EGALAX_PKT_TYPE_REPT 0x80
305#define EGALAX_PKT_TYPE_DIAG 0x0A
306
307static int egalax_init(struct usbtouch_usb *usbtouch)
308{
309 int ret, i;
310 unsigned char *buf;
311 struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
312
313 /*
314 * An eGalax diagnostic packet kicks the device into using the right
315 * protocol. We send a "check active" packet. The response will be
316 * read later and ignored.
317 */
318
319 buf = kmalloc(3, GFP_KERNEL);
320 if (!buf)
321 return -ENOMEM;
322
323 buf[0] = EGALAX_PKT_TYPE_DIAG;
324 buf[1] = 1; /* length */
325 buf[2] = 'A'; /* command - check active */
326
327 for (i = 0; i < 3; i++) {
328 ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
329 0,
330 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
331 0, 0, buf, 3,
332 USB_CTRL_SET_TIMEOUT);
333 if (ret >= 0) {
334 ret = 0;
335 break;
336 }
337 if (ret != -EPIPE)
338 break;
339 }
340
341 kfree(buf);
342
343 return ret;
344}
345
346static int egalax_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
347{
348 if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT)
349 return 0;
350
351 dev->x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F);
352 dev->y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F);
353 dev->touch = pkt[0] & 0x01;
354
355 return 1;
356}
357
358static int egalax_get_pkt_len(unsigned char *buf, int len)
359{
360 switch (buf[0] & EGALAX_PKT_TYPE_MASK) {
361 case EGALAX_PKT_TYPE_REPT:
362 return 5;
363
364 case EGALAX_PKT_TYPE_DIAG:
365 if (len < 2)
366 return -1;
367
368 return buf[1] + 2;
369 }
370
371 return 0;
372}
373#endif
374
375/*****************************************************************************
376 * EasyTouch part
377 */
378
379#ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
380
381#ifndef MULTI_PACKET
382#define MULTI_PACKET
383#endif
384
385#define ETOUCH_PKT_TYPE_MASK 0xFE
386#define ETOUCH_PKT_TYPE_REPT 0x80
387#define ETOUCH_PKT_TYPE_REPT2 0xB0
388#define ETOUCH_PKT_TYPE_DIAG 0x0A
389
390static int etouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
391{
392 if ((pkt[0] & ETOUCH_PKT_TYPE_MASK) != ETOUCH_PKT_TYPE_REPT &&
393 (pkt[0] & ETOUCH_PKT_TYPE_MASK) != ETOUCH_PKT_TYPE_REPT2)
394 return 0;
395
396 dev->x = ((pkt[1] & 0x1F) << 7) | (pkt[2] & 0x7F);
397 dev->y = ((pkt[3] & 0x1F) << 7) | (pkt[4] & 0x7F);
398 dev->touch = pkt[0] & 0x01;
399
400 return 1;
401}
402
403static int etouch_get_pkt_len(unsigned char *buf, int len)
404{
405 switch (buf[0] & ETOUCH_PKT_TYPE_MASK) {
406 case ETOUCH_PKT_TYPE_REPT:
407 case ETOUCH_PKT_TYPE_REPT2:
408 return 5;
409
410 case ETOUCH_PKT_TYPE_DIAG:
411 if (len < 2)
412 return -1;
413
414 return buf[1] + 2;
415 }
416
417 return 0;
418}
419#endif
420
421/*****************************************************************************
422 * PanJit Part
423 */
424#ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
425static int panjit_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
426{
427 dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
428 dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
429 dev->touch = pkt[0] & 0x01;
430
431 return 1;
432}
433#endif
434
435
436/*****************************************************************************
437 * 3M/Microtouch Part
438 */
439#ifdef CONFIG_TOUCHSCREEN_USB_3M
440
441#define MTOUCHUSB_ASYNC_REPORT 1
442#define MTOUCHUSB_RESET 7
443#define MTOUCHUSB_REQ_CTRLLR_ID 10
444
445static int mtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
446{
447 if (hwcalib_xy) {
448 dev->x = (pkt[4] << 8) | pkt[3];
449 dev->y = 0xffff - ((pkt[6] << 8) | pkt[5]);
450 } else {
451 dev->x = (pkt[8] << 8) | pkt[7];
452 dev->y = (pkt[10] << 8) | pkt[9];
453 }
454 dev->touch = (pkt[2] & 0x40) ? 1 : 0;
455
456 return 1;
457}
458
459static int mtouch_init(struct usbtouch_usb *usbtouch)
460{
461 int ret, i;
462 struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
463
464 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
465 MTOUCHUSB_RESET,
466 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
467 1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
468 dev_dbg(&usbtouch->interface->dev,
469 "%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d\n",
470 __func__, ret);
471 if (ret < 0)
472 return ret;
473 msleep(150);
474
475 for (i = 0; i < 3; i++) {
476 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
477 MTOUCHUSB_ASYNC_REPORT,
478 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
479 1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT);
480 dev_dbg(&usbtouch->interface->dev,
481 "%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d\n",
482 __func__, ret);
483 if (ret >= 0)
484 break;
485 if (ret != -EPIPE)
486 return ret;
487 }
488
489 /* Default min/max xy are the raw values, override if using hw-calib */
490 if (hwcalib_xy) {
491 input_set_abs_params(usbtouch->input, ABS_X, 0, 0xffff, 0, 0);
492 input_set_abs_params(usbtouch->input, ABS_Y, 0, 0xffff, 0, 0);
493 }
494
495 return 0;
496}
497#endif
498
499
500/*****************************************************************************
501 * ITM Part
502 */
503#ifdef CONFIG_TOUCHSCREEN_USB_ITM
504static int itm_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
505{
506 int touch;
507 /*
508 * ITM devices report invalid x/y data if not touched.
509 * if the screen was touched before but is not touched any more
510 * report touch as 0 with the last valid x/y data once. then stop
511 * reporting data until touched again.
512 */
513 dev->press = ((pkt[2] & 0x01) << 7) | (pkt[5] & 0x7F);
514
515 touch = ~pkt[7] & 0x20;
516 if (!touch) {
517 if (dev->touch) {
518 dev->touch = 0;
519 return 1;
520 }
521
522 return 0;
523 }
524
525 dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F);
526 dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F);
527 dev->touch = touch;
528
529 return 1;
530}
531#endif
532
533
534/*****************************************************************************
535 * eTurboTouch part
536 */
537#ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
538#ifndef MULTI_PACKET
539#define MULTI_PACKET
540#endif
541static int eturbo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
542{
543 unsigned int shift;
544
545 /* packets should start with sync */
546 if (!(pkt[0] & 0x80))
547 return 0;
548
549 shift = (6 - (pkt[0] & 0x03));
550 dev->x = ((pkt[3] << 7) | pkt[4]) >> shift;
551 dev->y = ((pkt[1] << 7) | pkt[2]) >> shift;
552 dev->touch = (pkt[0] & 0x10) ? 1 : 0;
553
554 return 1;
555}
556
557static int eturbo_get_pkt_len(unsigned char *buf, int len)
558{
559 if (buf[0] & 0x80)
560 return 5;
561 if (buf[0] == 0x01)
562 return 3;
563 return 0;
564}
565#endif
566
567
568/*****************************************************************************
569 * Gunze part
570 */
571#ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
572static int gunze_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
573{
574 if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80))
575 return 0;
576
577 dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F);
578 dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F);
579 dev->touch = pkt[0] & 0x20;
580
581 return 1;
582}
583#endif
584
585/*****************************************************************************
586 * DMC TSC-10/25 Part
587 *
588 * Documentation about the controller and it's protocol can be found at
589 * http://www.dmccoltd.com/files/controler/tsc10usb_pi_e.pdf
590 * http://www.dmccoltd.com/files/controler/tsc25_usb_e.pdf
591 */
592#ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
593
594/* supported data rates. currently using 130 */
595#define TSC10_RATE_POINT 0x50
596#define TSC10_RATE_30 0x40
597#define TSC10_RATE_50 0x41
598#define TSC10_RATE_80 0x42
599#define TSC10_RATE_100 0x43
600#define TSC10_RATE_130 0x44
601#define TSC10_RATE_150 0x45
602
603/* commands */
604#define TSC10_CMD_RESET 0x55
605#define TSC10_CMD_RATE 0x05
606#define TSC10_CMD_DATA1 0x01
607
608static int dmc_tsc10_init(struct usbtouch_usb *usbtouch)
609{
610 struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
611 int ret = -ENOMEM;
612 unsigned char *buf;
613
614 buf = kmalloc(2, GFP_NOIO);
615 if (!buf)
616 goto err_nobuf;
617 /* reset */
618 buf[0] = buf[1] = 0xFF;
619 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
620 TSC10_CMD_RESET,
621 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
622 0, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
623 if (ret < 0)
624 goto err_out;
625 if (buf[0] != 0x06) {
626 ret = -ENODEV;
627 goto err_out;
628 }
629
630 /* TSC-25 data sheet specifies a delay after the RESET command */
631 msleep(150);
632
633 /* set coordinate output rate */
634 buf[0] = buf[1] = 0xFF;
635 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
636 TSC10_CMD_RATE,
637 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
638 TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
639 if (ret < 0)
640 goto err_out;
641 if ((buf[0] != 0x06) && (buf[0] != 0x15 || buf[1] != 0x01)) {
642 ret = -ENODEV;
643 goto err_out;
644 }
645
646 /* start sending data */
647 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
648 TSC10_CMD_DATA1,
649 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
650 0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
651err_out:
652 kfree(buf);
653err_nobuf:
654 return ret;
655}
656
657
658static int dmc_tsc10_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
659{
660 dev->x = ((pkt[2] & 0x03) << 8) | pkt[1];
661 dev->y = ((pkt[4] & 0x03) << 8) | pkt[3];
662 dev->touch = pkt[0] & 0x01;
663
664 return 1;
665}
666#endif
667
668
669/*****************************************************************************
670 * IRTOUCH Part
671 */
672#ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
673static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
674{
675 dev->x = (pkt[3] << 8) | pkt[2];
676 dev->y = (pkt[5] << 8) | pkt[4];
677 dev->touch = (pkt[1] & 0x03) ? 1 : 0;
678
679 return 1;
680}
681#endif
682
683/*****************************************************************************
684 * ET&T TC5UH/TC4UM part
685 */
686#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
687static int tc45usb_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
688{
689 dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
690 dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
691 dev->touch = pkt[0] & 0x01;
692
693 return 1;
694}
695#endif
696
697/*****************************************************************************
698 * IdealTEK URTC1000 Part
699 */
700#ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
701#ifndef MULTI_PACKET
702#define MULTI_PACKET
703#endif
704static int idealtek_get_pkt_len(unsigned char *buf, int len)
705{
706 if (buf[0] & 0x80)
707 return 5;
708 if (buf[0] == 0x01)
709 return len;
710 return 0;
711}
712
713static int idealtek_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
714{
715 switch (pkt[0] & 0x98) {
716 case 0x88:
717 /* touch data in IdealTEK mode */
718 dev->x = (pkt[1] << 5) | (pkt[2] >> 2);
719 dev->y = (pkt[3] << 5) | (pkt[4] >> 2);
720 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
721 return 1;
722
723 case 0x98:
724 /* touch data in MT emulation mode */
725 dev->x = (pkt[2] << 5) | (pkt[1] >> 2);
726 dev->y = (pkt[4] << 5) | (pkt[3] >> 2);
727 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
728 return 1;
729
730 default:
731 return 0;
732 }
733}
734#endif
735
736/*****************************************************************************
737 * General Touch Part
738 */
739#ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
740static int general_touch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
741{
742 dev->x = (pkt[2] << 8) | pkt[1];
743 dev->y = (pkt[4] << 8) | pkt[3];
744 dev->press = pkt[5] & 0xff;
745 dev->touch = pkt[0] & 0x01;
746
747 return 1;
748}
749#endif
750
751/*****************************************************************************
752 * GoTop Part
753 */
754#ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
755static int gotop_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
756{
757 dev->x = ((pkt[1] & 0x38) << 4) | pkt[2];
758 dev->y = ((pkt[1] & 0x07) << 7) | pkt[3];
759 dev->touch = pkt[0] & 0x01;
760
761 return 1;
762}
763#endif
764
765/*****************************************************************************
766 * JASTEC Part
767 */
768#ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
769static int jastec_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
770{
771 dev->x = ((pkt[0] & 0x3f) << 6) | (pkt[2] & 0x3f);
772 dev->y = ((pkt[1] & 0x3f) << 6) | (pkt[3] & 0x3f);
773 dev->touch = (pkt[0] & 0x40) >> 6;
774
775 return 1;
776}
777#endif
778
779/*****************************************************************************
780 * Zytronic Part
781 */
782#ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
783static int zytronic_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
784{
785 struct usb_interface *intf = dev->interface;
786
787 switch (pkt[0]) {
788 case 0x3A: /* command response */
789 dev_dbg(&intf->dev, "%s: Command response %d\n", __func__, pkt[1]);
790 break;
791
792 case 0xC0: /* down */
793 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
794 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
795 dev->touch = 1;
796 dev_dbg(&intf->dev, "%s: down %d,%d\n", __func__, dev->x, dev->y);
797 return 1;
798
799 case 0x80: /* up */
800 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
801 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
802 dev->touch = 0;
803 dev_dbg(&intf->dev, "%s: up %d,%d\n", __func__, dev->x, dev->y);
804 return 1;
805
806 default:
807 dev_dbg(&intf->dev, "%s: Unknown return %d\n", __func__, pkt[0]);
808 break;
809 }
810
811 return 0;
812}
813#endif
814
815/*****************************************************************************
816 * NEXIO Part
817 */
818#ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
819
820#define NEXIO_TIMEOUT 5000
821#define NEXIO_BUFSIZE 1024
822#define NEXIO_THRESHOLD 50
823
824struct nexio_priv {
825 struct urb *ack;
826 unsigned char *ack_buf;
827};
828
829struct nexio_touch_packet {
830 u8 flags; /* 0xe1 = touch, 0xe1 = release */
831 __be16 data_len; /* total bytes of touch data */
832 __be16 x_len; /* bytes for X axis */
833 __be16 y_len; /* bytes for Y axis */
834 u8 data[];
835} __attribute__ ((packed));
836
837static unsigned char nexio_ack_pkt[2] = { 0xaa, 0x02 };
838static unsigned char nexio_init_pkt[4] = { 0x82, 0x04, 0x0a, 0x0f };
839
840static void nexio_ack_complete(struct urb *urb)
841{
842}
843
844static int nexio_alloc(struct usbtouch_usb *usbtouch)
845{
846 struct nexio_priv *priv;
847 int ret = -ENOMEM;
848
849 usbtouch->priv = kmalloc(sizeof(struct nexio_priv), GFP_KERNEL);
850 if (!usbtouch->priv)
851 goto out_buf;
852
853 priv = usbtouch->priv;
854
855 priv->ack_buf = kmemdup(nexio_ack_pkt, sizeof(nexio_ack_pkt),
856 GFP_KERNEL);
857 if (!priv->ack_buf)
858 goto err_priv;
859
860 priv->ack = usb_alloc_urb(0, GFP_KERNEL);
861 if (!priv->ack) {
862 dev_dbg(&usbtouch->interface->dev,
863 "%s - usb_alloc_urb failed: usbtouch->ack\n", __func__);
864 goto err_ack_buf;
865 }
866
867 return 0;
868
869err_ack_buf:
870 kfree(priv->ack_buf);
871err_priv:
872 kfree(priv);
873out_buf:
874 return ret;
875}
876
877static int nexio_init(struct usbtouch_usb *usbtouch)
878{
879 struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
880 struct usb_host_interface *interface = usbtouch->interface->cur_altsetting;
881 struct nexio_priv *priv = usbtouch->priv;
882 int ret = -ENOMEM;
883 int actual_len, i;
884 unsigned char *buf;
885 char *firmware_ver = NULL, *device_name = NULL;
886 int input_ep = 0, output_ep = 0;
887
888 /* find first input and output endpoint */
889 for (i = 0; i < interface->desc.bNumEndpoints; i++) {
890 if (!input_ep &&
891 usb_endpoint_dir_in(&interface->endpoint[i].desc))
892 input_ep = interface->endpoint[i].desc.bEndpointAddress;
893 if (!output_ep &&
894 usb_endpoint_dir_out(&interface->endpoint[i].desc))
895 output_ep = interface->endpoint[i].desc.bEndpointAddress;
896 }
897 if (!input_ep || !output_ep)
898 return -ENXIO;
899
900 buf = kmalloc(NEXIO_BUFSIZE, GFP_NOIO);
901 if (!buf)
902 goto out_buf;
903
904 /* two empty reads */
905 for (i = 0; i < 2; i++) {
906 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
907 buf, NEXIO_BUFSIZE, &actual_len,
908 NEXIO_TIMEOUT);
909 if (ret < 0)
910 goto out_buf;
911 }
912
913 /* send init command */
914 memcpy(buf, nexio_init_pkt, sizeof(nexio_init_pkt));
915 ret = usb_bulk_msg(dev, usb_sndbulkpipe(dev, output_ep),
916 buf, sizeof(nexio_init_pkt), &actual_len,
917 NEXIO_TIMEOUT);
918 if (ret < 0)
919 goto out_buf;
920
921 /* read replies */
922 for (i = 0; i < 3; i++) {
923 memset(buf, 0, NEXIO_BUFSIZE);
924 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
925 buf, NEXIO_BUFSIZE, &actual_len,
926 NEXIO_TIMEOUT);
927 if (ret < 0 || actual_len < 1 || buf[1] != actual_len)
928 continue;
929 switch (buf[0]) {
930 case 0x83: /* firmware version */
931 if (!firmware_ver)
932 firmware_ver = kstrdup(&buf[2], GFP_NOIO);
933 break;
934 case 0x84: /* device name */
935 if (!device_name)
936 device_name = kstrdup(&buf[2], GFP_NOIO);
937 break;
938 }
939 }
940
941 printk(KERN_INFO "Nexio device: %s, firmware version: %s\n",
942 device_name, firmware_ver);
943
944 kfree(firmware_ver);
945 kfree(device_name);
946
947 usb_fill_bulk_urb(priv->ack, dev, usb_sndbulkpipe(dev, output_ep),
948 priv->ack_buf, sizeof(nexio_ack_pkt),
949 nexio_ack_complete, usbtouch);
950 ret = 0;
951
952out_buf:
953 kfree(buf);
954 return ret;
955}
956
957static void nexio_exit(struct usbtouch_usb *usbtouch)
958{
959 struct nexio_priv *priv = usbtouch->priv;
960
961 usb_kill_urb(priv->ack);
962 usb_free_urb(priv->ack);
963 kfree(priv->ack_buf);
964 kfree(priv);
965}
966
967static int nexio_read_data(struct usbtouch_usb *usbtouch, unsigned char *pkt)
968{
969 struct nexio_touch_packet *packet = (void *) pkt;
970 struct nexio_priv *priv = usbtouch->priv;
971 unsigned int data_len = be16_to_cpu(packet->data_len);
972 unsigned int x_len = be16_to_cpu(packet->x_len);
973 unsigned int y_len = be16_to_cpu(packet->y_len);
974 int x, y, begin_x, begin_y, end_x, end_y, w, h, ret;
975
976 /* got touch data? */
977 if ((pkt[0] & 0xe0) != 0xe0)
978 return 0;
979
980 if (data_len > 0xff)
981 data_len -= 0x100;
982 if (x_len > 0xff)
983 x_len -= 0x80;
984
985 /* send ACK */
986 ret = usb_submit_urb(priv->ack, GFP_ATOMIC);
987
988 if (!usbtouch->type->max_xc) {
989 usbtouch->type->max_xc = 2 * x_len;
990 input_set_abs_params(usbtouch->input, ABS_X,
991 0, usbtouch->type->max_xc, 0, 0);
992 usbtouch->type->max_yc = 2 * y_len;
993 input_set_abs_params(usbtouch->input, ABS_Y,
994 0, usbtouch->type->max_yc, 0, 0);
995 }
996 /*
997 * The device reports state of IR sensors on X and Y axes.
998 * Each byte represents "darkness" percentage (0-100) of one element.
999 * 17" touchscreen reports only 64 x 52 bytes so the resolution is low.
1000 * This also means that there's a limited multi-touch capability but
1001 * it's disabled (and untested) here as there's no X driver for that.
1002 */
1003 begin_x = end_x = begin_y = end_y = -1;
1004 for (x = 0; x < x_len; x++) {
1005 if (begin_x == -1 && packet->data[x] > NEXIO_THRESHOLD) {
1006 begin_x = x;
1007 continue;
1008 }
1009 if (end_x == -1 && begin_x != -1 && packet->data[x] < NEXIO_THRESHOLD) {
1010 end_x = x - 1;
1011 for (y = x_len; y < data_len; y++) {
1012 if (begin_y == -1 && packet->data[y] > NEXIO_THRESHOLD) {
1013 begin_y = y - x_len;
1014 continue;
1015 }
1016 if (end_y == -1 &&
1017 begin_y != -1 && packet->data[y] < NEXIO_THRESHOLD) {
1018 end_y = y - 1 - x_len;
1019 w = end_x - begin_x;
1020 h = end_y - begin_y;
1021#if 0
1022 /* multi-touch */
1023 input_report_abs(usbtouch->input,
1024 ABS_MT_TOUCH_MAJOR, max(w,h));
1025 input_report_abs(usbtouch->input,
1026 ABS_MT_TOUCH_MINOR, min(x,h));
1027 input_report_abs(usbtouch->input,
1028 ABS_MT_POSITION_X, 2*begin_x+w);
1029 input_report_abs(usbtouch->input,
1030 ABS_MT_POSITION_Y, 2*begin_y+h);
1031 input_report_abs(usbtouch->input,
1032 ABS_MT_ORIENTATION, w > h);
1033 input_mt_sync(usbtouch->input);
1034#endif
1035 /* single touch */
1036 usbtouch->x = 2 * begin_x + w;
1037 usbtouch->y = 2 * begin_y + h;
1038 usbtouch->touch = packet->flags & 0x01;
1039 begin_y = end_y = -1;
1040 return 1;
1041 }
1042 }
1043 begin_x = end_x = -1;
1044 }
1045
1046 }
1047 return 0;
1048}
1049#endif
1050
1051
1052/*****************************************************************************
1053 * ELO part
1054 */
1055
1056#ifdef CONFIG_TOUCHSCREEN_USB_ELO
1057
1058static int elo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
1059{
1060 dev->x = (pkt[3] << 8) | pkt[2];
1061 dev->y = (pkt[5] << 8) | pkt[4];
1062 dev->touch = pkt[6] > 0;
1063 dev->press = pkt[6];
1064
1065 return 1;
1066}
1067#endif
1068
1069
1070/*****************************************************************************
1071 * the different device descriptors
1072 */
1073#ifdef MULTI_PACKET
1074static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1075 unsigned char *pkt, int len);
1076#endif
1077
1078static struct usbtouch_device_info usbtouch_dev_info[] = {
1079#ifdef CONFIG_TOUCHSCREEN_USB_ELO
1080 [DEVTYPE_ELO] = {
1081 .min_xc = 0x0,
1082 .max_xc = 0x0fff,
1083 .min_yc = 0x0,
1084 .max_yc = 0x0fff,
1085 .max_press = 0xff,
1086 .rept_size = 8,
1087 .read_data = elo_read_data,
1088 },
1089#endif
1090
1091#ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
1092 [DEVTYPE_EGALAX] = {
1093 .min_xc = 0x0,
1094 .max_xc = 0x07ff,
1095 .min_yc = 0x0,
1096 .max_yc = 0x07ff,
1097 .rept_size = 16,
1098 .process_pkt = usbtouch_process_multi,
1099 .get_pkt_len = egalax_get_pkt_len,
1100 .read_data = egalax_read_data,
1101 .init = egalax_init,
1102 },
1103#endif
1104
1105#ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
1106 [DEVTYPE_PANJIT] = {
1107 .min_xc = 0x0,
1108 .max_xc = 0x0fff,
1109 .min_yc = 0x0,
1110 .max_yc = 0x0fff,
1111 .rept_size = 8,
1112 .read_data = panjit_read_data,
1113 },
1114#endif
1115
1116#ifdef CONFIG_TOUCHSCREEN_USB_3M
1117 [DEVTYPE_3M] = {
1118 .min_xc = 0x0,
1119 .max_xc = 0x4000,
1120 .min_yc = 0x0,
1121 .max_yc = 0x4000,
1122 .rept_size = 11,
1123 .read_data = mtouch_read_data,
1124 .init = mtouch_init,
1125 },
1126#endif
1127
1128#ifdef CONFIG_TOUCHSCREEN_USB_ITM
1129 [DEVTYPE_ITM] = {
1130 .min_xc = 0x0,
1131 .max_xc = 0x0fff,
1132 .min_yc = 0x0,
1133 .max_yc = 0x0fff,
1134 .max_press = 0xff,
1135 .rept_size = 8,
1136 .read_data = itm_read_data,
1137 },
1138#endif
1139
1140#ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
1141 [DEVTYPE_ETURBO] = {
1142 .min_xc = 0x0,
1143 .max_xc = 0x07ff,
1144 .min_yc = 0x0,
1145 .max_yc = 0x07ff,
1146 .rept_size = 8,
1147 .process_pkt = usbtouch_process_multi,
1148 .get_pkt_len = eturbo_get_pkt_len,
1149 .read_data = eturbo_read_data,
1150 },
1151#endif
1152
1153#ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
1154 [DEVTYPE_GUNZE] = {
1155 .min_xc = 0x0,
1156 .max_xc = 0x0fff,
1157 .min_yc = 0x0,
1158 .max_yc = 0x0fff,
1159 .rept_size = 4,
1160 .read_data = gunze_read_data,
1161 },
1162#endif
1163
1164#ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
1165 [DEVTYPE_DMC_TSC10] = {
1166 .min_xc = 0x0,
1167 .max_xc = 0x03ff,
1168 .min_yc = 0x0,
1169 .max_yc = 0x03ff,
1170 .rept_size = 5,
1171 .init = dmc_tsc10_init,
1172 .read_data = dmc_tsc10_read_data,
1173 },
1174#endif
1175
1176#ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
1177 [DEVTYPE_IRTOUCH] = {
1178 .min_xc = 0x0,
1179 .max_xc = 0x0fff,
1180 .min_yc = 0x0,
1181 .max_yc = 0x0fff,
1182 .rept_size = 8,
1183 .read_data = irtouch_read_data,
1184 },
1185
1186 [DEVTYPE_IRTOUCH_HIRES] = {
1187 .min_xc = 0x0,
1188 .max_xc = 0x7fff,
1189 .min_yc = 0x0,
1190 .max_yc = 0x7fff,
1191 .rept_size = 8,
1192 .read_data = irtouch_read_data,
1193 },
1194#endif
1195
1196#ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
1197 [DEVTYPE_IDEALTEK] = {
1198 .min_xc = 0x0,
1199 .max_xc = 0x0fff,
1200 .min_yc = 0x0,
1201 .max_yc = 0x0fff,
1202 .rept_size = 8,
1203 .process_pkt = usbtouch_process_multi,
1204 .get_pkt_len = idealtek_get_pkt_len,
1205 .read_data = idealtek_read_data,
1206 },
1207#endif
1208
1209#ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
1210 [DEVTYPE_GENERAL_TOUCH] = {
1211 .min_xc = 0x0,
1212 .max_xc = 0x7fff,
1213 .min_yc = 0x0,
1214 .max_yc = 0x7fff,
1215 .rept_size = 7,
1216 .read_data = general_touch_read_data,
1217 },
1218#endif
1219
1220#ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
1221 [DEVTYPE_GOTOP] = {
1222 .min_xc = 0x0,
1223 .max_xc = 0x03ff,
1224 .min_yc = 0x0,
1225 .max_yc = 0x03ff,
1226 .rept_size = 4,
1227 .read_data = gotop_read_data,
1228 },
1229#endif
1230
1231#ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
1232 [DEVTYPE_JASTEC] = {
1233 .min_xc = 0x0,
1234 .max_xc = 0x0fff,
1235 .min_yc = 0x0,
1236 .max_yc = 0x0fff,
1237 .rept_size = 4,
1238 .read_data = jastec_read_data,
1239 },
1240#endif
1241
1242#ifdef CONFIG_TOUCHSCREEN_USB_E2I
1243 [DEVTYPE_E2I] = {
1244 .min_xc = 0x0,
1245 .max_xc = 0x7fff,
1246 .min_yc = 0x0,
1247 .max_yc = 0x7fff,
1248 .rept_size = 6,
1249 .init = e2i_init,
1250 .read_data = e2i_read_data,
1251 },
1252#endif
1253
1254#ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
1255 [DEVTYPE_ZYTRONIC] = {
1256 .min_xc = 0x0,
1257 .max_xc = 0x03ff,
1258 .min_yc = 0x0,
1259 .max_yc = 0x03ff,
1260 .rept_size = 5,
1261 .read_data = zytronic_read_data,
1262 .irq_always = true,
1263 },
1264#endif
1265
1266#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
1267 [DEVTYPE_TC45USB] = {
1268 .min_xc = 0x0,
1269 .max_xc = 0x0fff,
1270 .min_yc = 0x0,
1271 .max_yc = 0x0fff,
1272 .rept_size = 5,
1273 .read_data = tc45usb_read_data,
1274 },
1275#endif
1276
1277#ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
1278 [DEVTYPE_NEXIO] = {
1279 .rept_size = 1024,
1280 .irq_always = true,
1281 .read_data = nexio_read_data,
1282 .alloc = nexio_alloc,
1283 .init = nexio_init,
1284 .exit = nexio_exit,
1285 },
1286#endif
1287#ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
1288 [DEVTYPE_ETOUCH] = {
1289 .min_xc = 0x0,
1290 .max_xc = 0x07ff,
1291 .min_yc = 0x0,
1292 .max_yc = 0x07ff,
1293 .rept_size = 16,
1294 .process_pkt = usbtouch_process_multi,
1295 .get_pkt_len = etouch_get_pkt_len,
1296 .read_data = etouch_read_data,
1297 },
1298#endif
1299};
1300
1301
1302/*****************************************************************************
1303 * Generic Part
1304 */
1305static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
1306 unsigned char *pkt, int len)
1307{
1308 struct usbtouch_device_info *type = usbtouch->type;
1309
1310 if (!type->read_data(usbtouch, pkt))
1311 return;
1312
1313 input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch);
1314
1315 if (swap_xy) {
1316 input_report_abs(usbtouch->input, ABS_X, usbtouch->y);
1317 input_report_abs(usbtouch->input, ABS_Y, usbtouch->x);
1318 } else {
1319 input_report_abs(usbtouch->input, ABS_X, usbtouch->x);
1320 input_report_abs(usbtouch->input, ABS_Y, usbtouch->y);
1321 }
1322 if (type->max_press)
1323 input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press);
1324 input_sync(usbtouch->input);
1325}
1326
1327
1328#ifdef MULTI_PACKET
1329static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1330 unsigned char *pkt, int len)
1331{
1332 unsigned char *buffer;
1333 int pkt_len, pos, buf_len, tmp;
1334
1335 /* process buffer */
1336 if (unlikely(usbtouch->buf_len)) {
1337 /* try to get size */
1338 pkt_len = usbtouch->type->get_pkt_len(
1339 usbtouch->buffer, usbtouch->buf_len);
1340
1341 /* drop? */
1342 if (unlikely(!pkt_len))
1343 goto out_flush_buf;
1344
1345 /* need to append -pkt_len bytes before able to get size */
1346 if (unlikely(pkt_len < 0)) {
1347 int append = -pkt_len;
1348 if (unlikely(append > len))
1349 append = len;
1350 if (usbtouch->buf_len + append >= usbtouch->type->rept_size)
1351 goto out_flush_buf;
1352 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append);
1353 usbtouch->buf_len += append;
1354
1355 pkt_len = usbtouch->type->get_pkt_len(
1356 usbtouch->buffer, usbtouch->buf_len);
1357 if (pkt_len < 0)
1358 return;
1359 }
1360
1361 /* append */
1362 tmp = pkt_len - usbtouch->buf_len;
1363 if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size)
1364 goto out_flush_buf;
1365 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp);
1366 usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len);
1367
1368 buffer = pkt + tmp;
1369 buf_len = len - tmp;
1370 } else {
1371 buffer = pkt;
1372 buf_len = len;
1373 }
1374
1375 /* loop over the received packet, process */
1376 pos = 0;
1377 while (pos < buf_len) {
1378 /* get packet len */
1379 pkt_len = usbtouch->type->get_pkt_len(buffer + pos,
1380 buf_len - pos);
1381
1382 /* unknown packet: skip one byte */
1383 if (unlikely(!pkt_len)) {
1384 pos++;
1385 continue;
1386 }
1387
1388 /* full packet: process */
1389 if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) {
1390 usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len);
1391 } else {
1392 /* incomplete packet: save in buffer */
1393 memcpy(usbtouch->buffer, buffer + pos, buf_len - pos);
1394 usbtouch->buf_len = buf_len - pos;
1395 return;
1396 }
1397 pos += pkt_len;
1398 }
1399
1400out_flush_buf:
1401 usbtouch->buf_len = 0;
1402 return;
1403}
1404#endif
1405
1406
1407static void usbtouch_irq(struct urb *urb)
1408{
1409 struct usbtouch_usb *usbtouch = urb->context;
1410 struct device *dev = &usbtouch->interface->dev;
1411 int retval;
1412
1413 switch (urb->status) {
1414 case 0:
1415 /* success */
1416 break;
1417 case -ETIME:
1418 /* this urb is timing out */
1419 dev_dbg(dev,
1420 "%s - urb timed out - was the device unplugged?\n",
1421 __func__);
1422 return;
1423 case -ECONNRESET:
1424 case -ENOENT:
1425 case -ESHUTDOWN:
1426 case -EPIPE:
1427 /* this urb is terminated, clean up */
1428 dev_dbg(dev, "%s - urb shutting down with status: %d\n",
1429 __func__, urb->status);
1430 return;
1431 default:
1432 dev_dbg(dev, "%s - nonzero urb status received: %d\n",
1433 __func__, urb->status);
1434 goto exit;
1435 }
1436
1437 usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length);
1438
1439exit:
1440 usb_mark_last_busy(interface_to_usbdev(usbtouch->interface));
1441 retval = usb_submit_urb(urb, GFP_ATOMIC);
1442 if (retval)
1443 dev_err(dev, "%s - usb_submit_urb failed with result: %d\n",
1444 __func__, retval);
1445}
1446
1447static int usbtouch_open(struct input_dev *input)
1448{
1449 struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1450 int r;
1451
1452 usbtouch->irq->dev = interface_to_usbdev(usbtouch->interface);
1453
1454 r = usb_autopm_get_interface(usbtouch->interface) ? -EIO : 0;
1455 if (r < 0)
1456 goto out;
1457
1458 if (!usbtouch->type->irq_always) {
1459 if (usb_submit_urb(usbtouch->irq, GFP_KERNEL)) {
1460 r = -EIO;
1461 goto out_put;
1462 }
1463 }
1464
1465 usbtouch->interface->needs_remote_wakeup = 1;
1466out_put:
1467 usb_autopm_put_interface(usbtouch->interface);
1468out:
1469 return r;
1470}
1471
1472static void usbtouch_close(struct input_dev *input)
1473{
1474 struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1475 int r;
1476
1477 if (!usbtouch->type->irq_always)
1478 usb_kill_urb(usbtouch->irq);
1479 r = usb_autopm_get_interface(usbtouch->interface);
1480 usbtouch->interface->needs_remote_wakeup = 0;
1481 if (!r)
1482 usb_autopm_put_interface(usbtouch->interface);
1483}
1484
1485static int usbtouch_suspend
1486(struct usb_interface *intf, pm_message_t message)
1487{
1488 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1489
1490 usb_kill_urb(usbtouch->irq);
1491
1492 return 0;
1493}
1494
1495static int usbtouch_resume(struct usb_interface *intf)
1496{
1497 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1498 struct input_dev *input = usbtouch->input;
1499 int result = 0;
1500
1501 mutex_lock(&input->mutex);
1502 if (input->users || usbtouch->type->irq_always)
1503 result = usb_submit_urb(usbtouch->irq, GFP_NOIO);
1504 mutex_unlock(&input->mutex);
1505
1506 return result;
1507}
1508
1509static int usbtouch_reset_resume(struct usb_interface *intf)
1510{
1511 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1512 struct input_dev *input = usbtouch->input;
1513 int err = 0;
1514
1515 /* reinit the device */
1516 if (usbtouch->type->init) {
1517 err = usbtouch->type->init(usbtouch);
1518 if (err) {
1519 dev_dbg(&intf->dev,
1520 "%s - type->init() failed, err: %d\n",
1521 __func__, err);
1522 return err;
1523 }
1524 }
1525
1526 /* restart IO if needed */
1527 mutex_lock(&input->mutex);
1528 if (input->users)
1529 err = usb_submit_urb(usbtouch->irq, GFP_NOIO);
1530 mutex_unlock(&input->mutex);
1531
1532 return err;
1533}
1534
1535static void usbtouch_free_buffers(struct usb_device *udev,
1536 struct usbtouch_usb *usbtouch)
1537{
1538 usb_free_coherent(udev, usbtouch->data_size,
1539 usbtouch->data, usbtouch->data_dma);
1540 kfree(usbtouch->buffer);
1541}
1542
1543static struct usb_endpoint_descriptor *
1544usbtouch_get_input_endpoint(struct usb_host_interface *interface)
1545{
1546 int i;
1547
1548 for (i = 0; i < interface->desc.bNumEndpoints; i++)
1549 if (usb_endpoint_dir_in(&interface->endpoint[i].desc))
1550 return &interface->endpoint[i].desc;
1551
1552 return NULL;
1553}
1554
1555static int usbtouch_probe(struct usb_interface *intf,
1556 const struct usb_device_id *id)
1557{
1558 struct usbtouch_usb *usbtouch;
1559 struct input_dev *input_dev;
1560 struct usb_endpoint_descriptor *endpoint;
1561 struct usb_device *udev = interface_to_usbdev(intf);
1562 struct usbtouch_device_info *type;
1563 int err = -ENOMEM;
1564
1565 /* some devices are ignored */
1566 if (id->driver_info == DEVTYPE_IGNORE)
1567 return -ENODEV;
1568
1569 endpoint = usbtouch_get_input_endpoint(intf->cur_altsetting);
1570 if (!endpoint)
1571 return -ENXIO;
1572
1573 usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL);
1574 input_dev = input_allocate_device();
1575 if (!usbtouch || !input_dev)
1576 goto out_free;
1577
1578 type = &usbtouch_dev_info[id->driver_info];
1579 usbtouch->type = type;
1580 if (!type->process_pkt)
1581 type->process_pkt = usbtouch_process_pkt;
1582
1583 usbtouch->data_size = type->rept_size;
1584 if (type->get_pkt_len) {
1585 /*
1586 * When dealing with variable-length packets we should
1587 * not request more than wMaxPacketSize bytes at once
1588 * as we do not know if there is more data coming or
1589 * we filled exactly wMaxPacketSize bytes and there is
1590 * nothing else.
1591 */
1592 usbtouch->data_size = min(usbtouch->data_size,
1593 usb_endpoint_maxp(endpoint));
1594 }
1595
1596 usbtouch->data = usb_alloc_coherent(udev, usbtouch->data_size,
1597 GFP_KERNEL, &usbtouch->data_dma);
1598 if (!usbtouch->data)
1599 goto out_free;
1600
1601 if (type->get_pkt_len) {
1602 usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL);
1603 if (!usbtouch->buffer)
1604 goto out_free_buffers;
1605 }
1606
1607 usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
1608 if (!usbtouch->irq) {
1609 dev_dbg(&intf->dev,
1610 "%s - usb_alloc_urb failed: usbtouch->irq\n", __func__);
1611 goto out_free_buffers;
1612 }
1613
1614 usbtouch->interface = intf;
1615 usbtouch->input = input_dev;
1616
1617 if (udev->manufacturer)
1618 strlcpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name));
1619
1620 if (udev->product) {
1621 if (udev->manufacturer)
1622 strlcat(usbtouch->name, " ", sizeof(usbtouch->name));
1623 strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name));
1624 }
1625
1626 if (!strlen(usbtouch->name))
1627 snprintf(usbtouch->name, sizeof(usbtouch->name),
1628 "USB Touchscreen %04x:%04x",
1629 le16_to_cpu(udev->descriptor.idVendor),
1630 le16_to_cpu(udev->descriptor.idProduct));
1631
1632 usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys));
1633 strlcat(usbtouch->phys, "/input0", sizeof(usbtouch->phys));
1634
1635 input_dev->name = usbtouch->name;
1636 input_dev->phys = usbtouch->phys;
1637 usb_to_input_id(udev, &input_dev->id);
1638 input_dev->dev.parent = &intf->dev;
1639
1640 input_set_drvdata(input_dev, usbtouch);
1641
1642 input_dev->open = usbtouch_open;
1643 input_dev->close = usbtouch_close;
1644
1645 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
1646 input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
1647 input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0);
1648 input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0);
1649 if (type->max_press)
1650 input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press,
1651 type->max_press, 0, 0);
1652
1653 if (usb_endpoint_type(endpoint) == USB_ENDPOINT_XFER_INT)
1654 usb_fill_int_urb(usbtouch->irq, udev,
1655 usb_rcvintpipe(udev, endpoint->bEndpointAddress),
1656 usbtouch->data, usbtouch->data_size,
1657 usbtouch_irq, usbtouch, endpoint->bInterval);
1658 else
1659 usb_fill_bulk_urb(usbtouch->irq, udev,
1660 usb_rcvbulkpipe(udev, endpoint->bEndpointAddress),
1661 usbtouch->data, usbtouch->data_size,
1662 usbtouch_irq, usbtouch);
1663
1664 usbtouch->irq->dev = udev;
1665 usbtouch->irq->transfer_dma = usbtouch->data_dma;
1666 usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1667
1668 /* device specific allocations */
1669 if (type->alloc) {
1670 err = type->alloc(usbtouch);
1671 if (err) {
1672 dev_dbg(&intf->dev,
1673 "%s - type->alloc() failed, err: %d\n",
1674 __func__, err);
1675 goto out_free_urb;
1676 }
1677 }
1678
1679 /* device specific initialisation*/
1680 if (type->init) {
1681 err = type->init(usbtouch);
1682 if (err) {
1683 dev_dbg(&intf->dev,
1684 "%s - type->init() failed, err: %d\n",
1685 __func__, err);
1686 goto out_do_exit;
1687 }
1688 }
1689
1690 err = input_register_device(usbtouch->input);
1691 if (err) {
1692 dev_dbg(&intf->dev,
1693 "%s - input_register_device failed, err: %d\n",
1694 __func__, err);
1695 goto out_do_exit;
1696 }
1697
1698 usb_set_intfdata(intf, usbtouch);
1699
1700 if (usbtouch->type->irq_always) {
1701 /* this can't fail */
1702 usb_autopm_get_interface(intf);
1703 err = usb_submit_urb(usbtouch->irq, GFP_KERNEL);
1704 if (err) {
1705 usb_autopm_put_interface(intf);
1706 dev_err(&intf->dev,
1707 "%s - usb_submit_urb failed with result: %d\n",
1708 __func__, err);
1709 goto out_unregister_input;
1710 }
1711 }
1712
1713 return 0;
1714
1715out_unregister_input:
1716 input_unregister_device(input_dev);
1717 input_dev = NULL;
1718out_do_exit:
1719 if (type->exit)
1720 type->exit(usbtouch);
1721out_free_urb:
1722 usb_free_urb(usbtouch->irq);
1723out_free_buffers:
1724 usbtouch_free_buffers(udev, usbtouch);
1725out_free:
1726 input_free_device(input_dev);
1727 kfree(usbtouch);
1728 return err;
1729}
1730
1731static void usbtouch_disconnect(struct usb_interface *intf)
1732{
1733 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1734
1735 if (!usbtouch)
1736 return;
1737
1738 dev_dbg(&intf->dev,
1739 "%s - usbtouch is initialized, cleaning up\n", __func__);
1740
1741 usb_set_intfdata(intf, NULL);
1742 /* this will stop IO via close */
1743 input_unregister_device(usbtouch->input);
1744 usb_free_urb(usbtouch->irq);
1745 if (usbtouch->type->exit)
1746 usbtouch->type->exit(usbtouch);
1747 usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch);
1748 kfree(usbtouch);
1749}
1750
1751MODULE_DEVICE_TABLE(usb, usbtouch_devices);
1752
1753static struct usb_driver usbtouch_driver = {
1754 .name = "usbtouchscreen",
1755 .probe = usbtouch_probe,
1756 .disconnect = usbtouch_disconnect,
1757 .suspend = usbtouch_suspend,
1758 .resume = usbtouch_resume,
1759 .reset_resume = usbtouch_reset_resume,
1760 .id_table = usbtouch_devices,
1761 .supports_autosuspend = 1,
1762};
1763
1764module_usb_driver(usbtouch_driver);
1765
1766MODULE_AUTHOR(DRIVER_AUTHOR);
1767MODULE_DESCRIPTION(DRIVER_DESC);
1768MODULE_LICENSE("GPL");
1769
1770MODULE_ALIAS("touchkitusb");
1771MODULE_ALIAS("itmtouch");
1772MODULE_ALIAS("mtouchusb");