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