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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 <[email protected]>
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 /*
72 * used to get the packet len. possible return values:
73 * > 0: packet len
74 * = 0: skip one byte
75 * < 0: -return value more bytes needed
76 */
77 int (*get_pkt_len) (unsigned char *pkt, int len);
78
79 int (*read_data) (struct usbtouch_usb *usbtouch, unsigned char *pkt);
80 int (*alloc) (struct usbtouch_usb *usbtouch);
81 int (*init) (struct usbtouch_usb *usbtouch);
82 void (*exit) (struct usbtouch_usb *usbtouch);
83};
84
85/* a usbtouch device */
86struct usbtouch_usb {
87 unsigned char *data;
88 dma_addr_t data_dma;
89 int data_size;
90 unsigned char *buffer;
91 int buf_len;
92 struct urb *irq;
93 struct usb_interface *interface;
94 struct input_dev *input;
95 const struct usbtouch_device_info *type;
96 struct mutex pm_mutex; /* serialize access to open/suspend */
97 bool is_open;
98 char name[128];
99 char phys[64];
100 void *priv;
101
102 int x, y;
103 int touch, press;
104
105 void (*process_pkt)(struct usbtouch_usb *usbtouch, unsigned char *pkt, int len);
106};
107
108
109/*****************************************************************************
110 * e2i Part
111 */
112
113#ifdef CONFIG_TOUCHSCREEN_USB_E2I
114static int e2i_init(struct usbtouch_usb *usbtouch)
115{
116 int ret;
117 struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
118
119 ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
120 0x01, 0x02, 0x0000, 0x0081,
121 NULL, 0, USB_CTRL_SET_TIMEOUT);
122
123 dev_dbg(&usbtouch->interface->dev,
124 "%s - usb_control_msg - E2I_RESET - bytes|err: %d\n",
125 __func__, ret);
126 return ret;
127}
128
129static int e2i_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
130{
131 int tmp = (pkt[0] << 8) | pkt[1];
132 dev->x = (pkt[2] << 8) | pkt[3];
133 dev->y = (pkt[4] << 8) | pkt[5];
134
135 tmp = tmp - 0xA000;
136 dev->touch = (tmp > 0);
137 dev->press = (tmp > 0 ? tmp : 0);
138
139 return 1;
140}
141
142static const struct usbtouch_device_info e2i_dev_info = {
143 .min_xc = 0x0,
144 .max_xc = 0x7fff,
145 .min_yc = 0x0,
146 .max_yc = 0x7fff,
147 .rept_size = 6,
148 .init = e2i_init,
149 .read_data = e2i_read_data,
150};
151#endif
152
153
154/*****************************************************************************
155 * eGalax part
156 */
157
158#ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
159
160#ifndef MULTI_PACKET
161#define MULTI_PACKET
162#endif
163
164#define EGALAX_PKT_TYPE_MASK 0xFE
165#define EGALAX_PKT_TYPE_REPT 0x80
166#define EGALAX_PKT_TYPE_DIAG 0x0A
167
168static int egalax_init(struct usbtouch_usb *usbtouch)
169{
170 struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
171 int ret, i;
172
173 /*
174 * An eGalax diagnostic packet kicks the device into using the right
175 * protocol. We send a "check active" packet. The response will be
176 * read later and ignored.
177 */
178
179 u8 *buf __free(kfree) = kmalloc(3, GFP_KERNEL);
180 if (!buf)
181 return -ENOMEM;
182
183 buf[0] = EGALAX_PKT_TYPE_DIAG;
184 buf[1] = 1; /* length */
185 buf[2] = 'A'; /* command - check active */
186
187 for (i = 0; i < 3; i++) {
188 ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
189 0,
190 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
191 0, 0, buf, 3,
192 USB_CTRL_SET_TIMEOUT);
193 if (ret != -EPIPE)
194 break;
195 }
196
197 return ret < 0 ? ret : 0;
198}
199
200static int egalax_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
201{
202 if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT)
203 return 0;
204
205 dev->x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F);
206 dev->y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F);
207 dev->touch = pkt[0] & 0x01;
208
209 return 1;
210}
211
212static int egalax_get_pkt_len(unsigned char *buf, int len)
213{
214 switch (buf[0] & EGALAX_PKT_TYPE_MASK) {
215 case EGALAX_PKT_TYPE_REPT:
216 return 5;
217
218 case EGALAX_PKT_TYPE_DIAG:
219 if (len < 2)
220 return -1;
221
222 return buf[1] + 2;
223 }
224
225 return 0;
226}
227
228static const struct usbtouch_device_info egalax_dev_info = {
229 .min_xc = 0x0,
230 .max_xc = 0x07ff,
231 .min_yc = 0x0,
232 .max_yc = 0x07ff,
233 .rept_size = 16,
234 .get_pkt_len = egalax_get_pkt_len,
235 .read_data = egalax_read_data,
236 .init = egalax_init,
237};
238#endif
239
240/*****************************************************************************
241 * EasyTouch part
242 */
243
244#ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
245
246#ifndef MULTI_PACKET
247#define MULTI_PACKET
248#endif
249
250#define ETOUCH_PKT_TYPE_MASK 0xFE
251#define ETOUCH_PKT_TYPE_REPT 0x80
252#define ETOUCH_PKT_TYPE_REPT2 0xB0
253#define ETOUCH_PKT_TYPE_DIAG 0x0A
254
255static int etouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
256{
257 if ((pkt[0] & ETOUCH_PKT_TYPE_MASK) != ETOUCH_PKT_TYPE_REPT &&
258 (pkt[0] & ETOUCH_PKT_TYPE_MASK) != ETOUCH_PKT_TYPE_REPT2)
259 return 0;
260
261 dev->x = ((pkt[1] & 0x1F) << 7) | (pkt[2] & 0x7F);
262 dev->y = ((pkt[3] & 0x1F) << 7) | (pkt[4] & 0x7F);
263 dev->touch = pkt[0] & 0x01;
264
265 return 1;
266}
267
268static int etouch_get_pkt_len(unsigned char *buf, int len)
269{
270 switch (buf[0] & ETOUCH_PKT_TYPE_MASK) {
271 case ETOUCH_PKT_TYPE_REPT:
272 case ETOUCH_PKT_TYPE_REPT2:
273 return 5;
274
275 case ETOUCH_PKT_TYPE_DIAG:
276 if (len < 2)
277 return -1;
278
279 return buf[1] + 2;
280 }
281
282 return 0;
283}
284
285static const struct usbtouch_device_info etouch_dev_info = {
286 .min_xc = 0x0,
287 .max_xc = 0x07ff,
288 .min_yc = 0x0,
289 .max_yc = 0x07ff,
290 .rept_size = 16,
291 .get_pkt_len = etouch_get_pkt_len,
292 .read_data = etouch_read_data,
293};
294#endif
295
296/*****************************************************************************
297 * PanJit Part
298 */
299#ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
300static int panjit_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
301{
302 dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
303 dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
304 dev->touch = pkt[0] & 0x01;
305
306 return 1;
307}
308
309static const struct usbtouch_device_info panjit_dev_info = {
310 .min_xc = 0x0,
311 .max_xc = 0x0fff,
312 .min_yc = 0x0,
313 .max_yc = 0x0fff,
314 .rept_size = 8,
315 .read_data = panjit_read_data,
316};
317#endif
318
319
320/*****************************************************************************
321 * 3M/Microtouch Part
322 */
323#ifdef CONFIG_TOUCHSCREEN_USB_3M
324
325#define MTOUCHUSB_ASYNC_REPORT 1
326#define MTOUCHUSB_RESET 7
327#define MTOUCHUSB_REQ_CTRLLR_ID 10
328
329#define MTOUCHUSB_REQ_CTRLLR_ID_LEN 16
330
331static int mtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
332{
333 if (hwcalib_xy) {
334 dev->x = (pkt[4] << 8) | pkt[3];
335 dev->y = 0xffff - ((pkt[6] << 8) | pkt[5]);
336 } else {
337 dev->x = (pkt[8] << 8) | pkt[7];
338 dev->y = (pkt[10] << 8) | pkt[9];
339 }
340 dev->touch = (pkt[2] & 0x40) ? 1 : 0;
341
342 return 1;
343}
344
345struct mtouch_priv {
346 u8 fw_rev_major;
347 u8 fw_rev_minor;
348};
349
350static int mtouch_get_fw_revision(struct usbtouch_usb *usbtouch)
351{
352 struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
353 struct mtouch_priv *priv = usbtouch->priv;
354 int ret;
355
356 u8 *buf __free(kfree) = kzalloc(MTOUCHUSB_REQ_CTRLLR_ID_LEN, GFP_NOIO);
357 if (!buf)
358 return -ENOMEM;
359
360 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
361 MTOUCHUSB_REQ_CTRLLR_ID,
362 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
363 0, 0, buf, MTOUCHUSB_REQ_CTRLLR_ID_LEN,
364 USB_CTRL_SET_TIMEOUT);
365 if (ret != MTOUCHUSB_REQ_CTRLLR_ID_LEN) {
366 dev_warn(&usbtouch->interface->dev,
367 "Failed to read FW rev: %d\n", ret);
368 return ret < 0 ? ret : -EIO;
369 }
370
371 priv->fw_rev_major = buf[3];
372 priv->fw_rev_minor = buf[4];
373
374 return 0;
375}
376
377static int mtouch_alloc(struct usbtouch_usb *usbtouch)
378{
379 struct mtouch_priv *priv;
380
381 priv = kmalloc_obj(*priv);
382 if (!priv)
383 return -ENOMEM;
384
385 usbtouch->priv = priv;
386 return 0;
387}
388
389static int mtouch_init(struct usbtouch_usb *usbtouch)
390{
391 int ret, i;
392 struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
393
394 ret = mtouch_get_fw_revision(usbtouch);
395 if (ret)
396 return ret;
397
398 ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
399 MTOUCHUSB_RESET,
400 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
401 1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
402 dev_dbg(&usbtouch->interface->dev,
403 "%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d\n",
404 __func__, ret);
405 if (ret < 0)
406 return ret;
407 msleep(150);
408
409 for (i = 0; i < 3; i++) {
410 ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
411 MTOUCHUSB_ASYNC_REPORT,
412 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
413 1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT);
414 dev_dbg(&usbtouch->interface->dev,
415 "%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d\n",
416 __func__, ret);
417 if (ret >= 0)
418 break;
419 if (ret != -EPIPE)
420 return ret;
421 }
422
423 /* Default min/max xy are the raw values, override if using hw-calib */
424 if (hwcalib_xy) {
425 input_set_abs_params(usbtouch->input, ABS_X, 0, 0xffff, 0, 0);
426 input_set_abs_params(usbtouch->input, ABS_Y, 0, 0xffff, 0, 0);
427 }
428
429 return 0;
430}
431
432static void mtouch_exit(struct usbtouch_usb *usbtouch)
433{
434 struct mtouch_priv *priv = usbtouch->priv;
435
436 kfree(priv);
437}
438
439static struct usbtouch_device_info mtouch_dev_info = {
440 .min_xc = 0x0,
441 .max_xc = 0x4000,
442 .min_yc = 0x0,
443 .max_yc = 0x4000,
444 .rept_size = 11,
445 .read_data = mtouch_read_data,
446 .alloc = mtouch_alloc,
447 .init = mtouch_init,
448 .exit = mtouch_exit,
449};
450
451static ssize_t mtouch_firmware_rev_show(struct device *dev,
452 struct device_attribute *attr, char *output)
453{
454 struct usb_interface *intf = to_usb_interface(dev);
455 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
456 struct mtouch_priv *priv = usbtouch->priv;
457
458 return sysfs_emit(output, "%1x.%1x\n",
459 priv->fw_rev_major, priv->fw_rev_minor);
460}
461static DEVICE_ATTR(firmware_rev, 0444, mtouch_firmware_rev_show, NULL);
462
463static struct attribute *mtouch_attrs[] = {
464 &dev_attr_firmware_rev.attr,
465 NULL
466};
467
468static bool mtouch_group_visible(struct kobject *kobj)
469{
470 struct device *dev = kobj_to_dev(kobj);
471 struct usb_interface *intf = to_usb_interface(dev);
472 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
473
474 return usbtouch->type == &mtouch_dev_info;
475}
476
477DEFINE_SIMPLE_SYSFS_GROUP_VISIBLE(mtouch);
478
479static const struct attribute_group mtouch_attr_group = {
480 .is_visible = SYSFS_GROUP_VISIBLE(mtouch),
481 .attrs = mtouch_attrs,
482};
483#endif
484
485
486/*****************************************************************************
487 * ITM Part
488 */
489#ifdef CONFIG_TOUCHSCREEN_USB_ITM
490static int itm_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
491{
492 int touch;
493 /*
494 * ITM devices report invalid x/y data if not touched.
495 * if the screen was touched before but is not touched any more
496 * report touch as 0 with the last valid x/y data once. then stop
497 * reporting data until touched again.
498 */
499 dev->press = ((pkt[2] & 0x01) << 7) | (pkt[5] & 0x7F);
500
501 touch = ~pkt[7] & 0x20;
502 if (!touch) {
503 if (dev->touch) {
504 dev->touch = 0;
505 return 1;
506 }
507
508 return 0;
509 }
510
511 dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F);
512 dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F);
513 dev->touch = touch;
514
515 return 1;
516}
517
518static const struct usbtouch_device_info itm_dev_info = {
519 .min_xc = 0x0,
520 .max_xc = 0x0fff,
521 .min_yc = 0x0,
522 .max_yc = 0x0fff,
523 .max_press = 0xff,
524 .rept_size = 8,
525 .read_data = itm_read_data,
526};
527#endif
528
529
530/*****************************************************************************
531 * eTurboTouch part
532 */
533#ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
534#ifndef MULTI_PACKET
535#define MULTI_PACKET
536#endif
537static int eturbo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
538{
539 unsigned int shift;
540
541 /* packets should start with sync */
542 if (!(pkt[0] & 0x80))
543 return 0;
544
545 shift = (6 - (pkt[0] & 0x03));
546 dev->x = ((pkt[3] << 7) | pkt[4]) >> shift;
547 dev->y = ((pkt[1] << 7) | pkt[2]) >> shift;
548 dev->touch = (pkt[0] & 0x10) ? 1 : 0;
549
550 return 1;
551}
552
553static int eturbo_get_pkt_len(unsigned char *buf, int len)
554{
555 if (buf[0] & 0x80)
556 return 5;
557 if (buf[0] == 0x01)
558 return 3;
559 return 0;
560}
561
562static const struct usbtouch_device_info eturbo_dev_info = {
563 .min_xc = 0x0,
564 .max_xc = 0x07ff,
565 .min_yc = 0x0,
566 .max_yc = 0x07ff,
567 .rept_size = 8,
568 .get_pkt_len = eturbo_get_pkt_len,
569 .read_data = eturbo_read_data,
570};
571#endif
572
573
574/*****************************************************************************
575 * Gunze part
576 */
577#ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
578static int gunze_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
579{
580 if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80))
581 return 0;
582
583 dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F);
584 dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F);
585 dev->touch = pkt[0] & 0x20;
586
587 return 1;
588}
589
590static const struct usbtouch_device_info gunze_dev_info = {
591 .min_xc = 0x0,
592 .max_xc = 0x0fff,
593 .min_yc = 0x0,
594 .max_yc = 0x0fff,
595 .rept_size = 4,
596 .read_data = gunze_read_data,
597};
598#endif
599
600/*****************************************************************************
601 * DMC TSC-10/25 Part
602 *
603 * Documentation about the controller and it's protocol can be found at
604 * http://www.dmccoltd.com/files/controler/tsc10usb_pi_e.pdf
605 * http://www.dmccoltd.com/files/controler/tsc25_usb_e.pdf
606 */
607#ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
608
609/* supported data rates. currently using 130 */
610#define TSC10_RATE_POINT 0x50
611#define TSC10_RATE_30 0x40
612#define TSC10_RATE_50 0x41
613#define TSC10_RATE_80 0x42
614#define TSC10_RATE_100 0x43
615#define TSC10_RATE_130 0x44
616#define TSC10_RATE_150 0x45
617
618/* commands */
619#define TSC10_CMD_RESET 0x55
620#define TSC10_CMD_RATE 0x05
621#define TSC10_CMD_DATA1 0x01
622
623static int dmc_tsc10_init(struct usbtouch_usb *usbtouch)
624{
625 struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
626 int ret;
627
628 u8 *buf __free(kfree) = kmalloc(2, GFP_NOIO);
629 if (!buf)
630 return -ENOMEM;
631
632 /* reset */
633 buf[0] = buf[1] = 0xFF;
634 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
635 TSC10_CMD_RESET,
636 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
637 0, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
638 if (ret < 0)
639 return ret;
640
641 if (buf[0] != 0x06)
642 return -ENODEV;
643
644 /* TSC-25 data sheet specifies a delay after the RESET command */
645 msleep(150);
646
647 /* set coordinate output rate */
648 buf[0] = buf[1] = 0xFF;
649 ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
650 TSC10_CMD_RATE,
651 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
652 TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
653 if (ret < 0)
654 return ret;
655
656 if (buf[0] != 0x06 && (buf[0] != 0x15 || buf[1] != 0x01))
657 return -ENODEV;
658
659 /* start sending data */
660 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
661 TSC10_CMD_DATA1,
662 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
663 0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
664}
665
666static int dmc_tsc10_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
667{
668 dev->x = ((pkt[2] & 0x03) << 8) | pkt[1];
669 dev->y = ((pkt[4] & 0x03) << 8) | pkt[3];
670 dev->touch = pkt[0] & 0x01;
671
672 return 1;
673}
674
675static const struct usbtouch_device_info dmc_tsc10_dev_info = {
676 .min_xc = 0x0,
677 .max_xc = 0x03ff,
678 .min_yc = 0x0,
679 .max_yc = 0x03ff,
680 .rept_size = 5,
681 .init = dmc_tsc10_init,
682 .read_data = dmc_tsc10_read_data,
683};
684#endif
685
686
687/*****************************************************************************
688 * IRTOUCH Part
689 */
690#ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
691static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
692{
693 dev->x = (pkt[3] << 8) | pkt[2];
694 dev->y = (pkt[5] << 8) | pkt[4];
695 dev->touch = (pkt[1] & 0x03) ? 1 : 0;
696
697 return 1;
698}
699
700static const struct usbtouch_device_info irtouch_dev_info = {
701 .min_xc = 0x0,
702 .max_xc = 0x0fff,
703 .min_yc = 0x0,
704 .max_yc = 0x0fff,
705 .rept_size = 8,
706 .read_data = irtouch_read_data,
707};
708
709static const struct usbtouch_device_info irtouch_hires_dev_info = {
710 .min_xc = 0x0,
711 .max_xc = 0x7fff,
712 .min_yc = 0x0,
713 .max_yc = 0x7fff,
714 .rept_size = 8,
715 .read_data = irtouch_read_data,
716};
717#endif
718
719/*****************************************************************************
720 * ET&T TC5UH/TC4UM part
721 */
722#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
723static int tc45usb_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
724{
725 dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
726 dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
727 dev->touch = pkt[0] & 0x01;
728
729 return 1;
730}
731
732static const struct usbtouch_device_info tc45usb_dev_info = {
733 .min_xc = 0x0,
734 .max_xc = 0x0fff,
735 .min_yc = 0x0,
736 .max_yc = 0x0fff,
737 .rept_size = 5,
738 .read_data = tc45usb_read_data,
739};
740#endif
741
742/*****************************************************************************
743 * IdealTEK URTC1000 Part
744 */
745#ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
746#ifndef MULTI_PACKET
747#define MULTI_PACKET
748#endif
749static int idealtek_get_pkt_len(unsigned char *buf, int len)
750{
751 if (buf[0] & 0x80)
752 return 5;
753 if (buf[0] == 0x01)
754 return len;
755 return 0;
756}
757
758static int idealtek_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
759{
760 switch (pkt[0] & 0x98) {
761 case 0x88:
762 /* touch data in IdealTEK mode */
763 dev->x = (pkt[1] << 5) | (pkt[2] >> 2);
764 dev->y = (pkt[3] << 5) | (pkt[4] >> 2);
765 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
766 return 1;
767
768 case 0x98:
769 /* touch data in MT emulation mode */
770 dev->x = (pkt[2] << 5) | (pkt[1] >> 2);
771 dev->y = (pkt[4] << 5) | (pkt[3] >> 2);
772 dev->touch = (pkt[0] & 0x40) ? 1 : 0;
773 return 1;
774
775 default:
776 return 0;
777 }
778}
779
780static const struct usbtouch_device_info idealtek_dev_info = {
781 .min_xc = 0x0,
782 .max_xc = 0x0fff,
783 .min_yc = 0x0,
784 .max_yc = 0x0fff,
785 .rept_size = 8,
786 .get_pkt_len = idealtek_get_pkt_len,
787 .read_data = idealtek_read_data,
788};
789#endif
790
791/*****************************************************************************
792 * General Touch Part
793 */
794#ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
795static int general_touch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
796{
797 dev->x = (pkt[2] << 8) | pkt[1];
798 dev->y = (pkt[4] << 8) | pkt[3];
799 dev->press = pkt[5] & 0xff;
800 dev->touch = pkt[0] & 0x01;
801
802 return 1;
803}
804
805static const struct usbtouch_device_info general_touch_dev_info = {
806 .min_xc = 0x0,
807 .max_xc = 0x7fff,
808 .min_yc = 0x0,
809 .max_yc = 0x7fff,
810 .rept_size = 7,
811 .read_data = general_touch_read_data,
812};
813#endif
814
815/*****************************************************************************
816 * GoTop Part
817 */
818#ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
819static int gotop_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
820{
821 dev->x = ((pkt[1] & 0x38) << 4) | pkt[2];
822 dev->y = ((pkt[1] & 0x07) << 7) | pkt[3];
823 dev->touch = pkt[0] & 0x01;
824
825 return 1;
826}
827
828static const struct usbtouch_device_info gotop_dev_info = {
829 .min_xc = 0x0,
830 .max_xc = 0x03ff,
831 .min_yc = 0x0,
832 .max_yc = 0x03ff,
833 .rept_size = 4,
834 .read_data = gotop_read_data,
835};
836#endif
837
838/*****************************************************************************
839 * JASTEC Part
840 */
841#ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
842static int jastec_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
843{
844 dev->x = ((pkt[0] & 0x3f) << 6) | (pkt[2] & 0x3f);
845 dev->y = ((pkt[1] & 0x3f) << 6) | (pkt[3] & 0x3f);
846 dev->touch = (pkt[0] & 0x40) >> 6;
847
848 return 1;
849}
850
851static const struct usbtouch_device_info jastec_dev_info = {
852 .min_xc = 0x0,
853 .max_xc = 0x0fff,
854 .min_yc = 0x0,
855 .max_yc = 0x0fff,
856 .rept_size = 4,
857 .read_data = jastec_read_data,
858};
859#endif
860
861/*****************************************************************************
862 * Zytronic Part
863 */
864#ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
865static int zytronic_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
866{
867 struct usb_interface *intf = dev->interface;
868
869 switch (pkt[0]) {
870 case 0x3A: /* command response */
871 dev_dbg(&intf->dev, "%s: Command response %d\n", __func__, pkt[1]);
872 break;
873
874 case 0xC0: /* down */
875 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
876 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
877 dev->touch = 1;
878 dev_dbg(&intf->dev, "%s: down %d,%d\n", __func__, dev->x, dev->y);
879 return 1;
880
881 case 0x80: /* up */
882 dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
883 dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
884 dev->touch = 0;
885 dev_dbg(&intf->dev, "%s: up %d,%d\n", __func__, dev->x, dev->y);
886 return 1;
887
888 default:
889 dev_dbg(&intf->dev, "%s: Unknown return %d\n", __func__, pkt[0]);
890 break;
891 }
892
893 return 0;
894}
895
896static const struct usbtouch_device_info zytronic_dev_info = {
897 .min_xc = 0x0,
898 .max_xc = 0x03ff,
899 .min_yc = 0x0,
900 .max_yc = 0x03ff,
901 .rept_size = 5,
902 .read_data = zytronic_read_data,
903 .irq_always = true,
904};
905#endif
906
907/*****************************************************************************
908 * NEXIO Part
909 */
910#ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
911
912#define NEXIO_TIMEOUT 5000
913#define NEXIO_BUFSIZE 1024
914#define NEXIO_THRESHOLD 50
915
916struct nexio_priv {
917 struct urb *ack;
918 unsigned char *ack_buf;
919};
920
921struct nexio_touch_packet {
922 u8 flags; /* 0xe1 = touch, 0xe1 = release */
923 __be16 data_len; /* total bytes of touch data */
924 __be16 x_len; /* bytes for X axis */
925 __be16 y_len; /* bytes for Y axis */
926 u8 data[];
927} __attribute__ ((packed));
928
929static unsigned char nexio_ack_pkt[2] = { 0xaa, 0x02 };
930static unsigned char nexio_init_pkt[4] = { 0x82, 0x04, 0x0a, 0x0f };
931
932static void nexio_ack_complete(struct urb *urb)
933{
934}
935
936static int nexio_alloc(struct usbtouch_usb *usbtouch)
937{
938 struct nexio_priv *priv;
939 int ret = -ENOMEM;
940
941 priv = kmalloc_obj(*priv);
942 if (!priv)
943 goto out_buf;
944
945 usbtouch->priv = priv;
946 priv->ack_buf = kmemdup(nexio_ack_pkt, sizeof(nexio_ack_pkt),
947 GFP_KERNEL);
948 if (!priv->ack_buf)
949 goto err_priv;
950
951 priv->ack = usb_alloc_urb(0, GFP_KERNEL);
952 if (!priv->ack) {
953 dev_dbg(&usbtouch->interface->dev,
954 "%s - usb_alloc_urb failed: usbtouch->ack\n", __func__);
955 goto err_ack_buf;
956 }
957
958 return 0;
959
960err_ack_buf:
961 kfree(priv->ack_buf);
962err_priv:
963 kfree(priv);
964out_buf:
965 return ret;
966}
967
968static int nexio_init(struct usbtouch_usb *usbtouch)
969{
970 struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
971 struct usb_host_interface *interface = usbtouch->interface->cur_altsetting;
972 struct usb_endpoint_descriptor *ep_in, *ep_out;
973 struct nexio_priv *priv = usbtouch->priv;
974 int actual_len, i;
975 char *firmware_ver = NULL, *device_name = NULL;
976 int input_ep, output_ep;
977 int ret;
978
979 /* find first input and output endpoint */
980 ret = usb_find_common_endpoints(interface, &ep_in, &ep_out, NULL, NULL);
981 if (ret)
982 return -ENXIO;
983
984 input_ep = usb_endpoint_num(ep_in);
985 output_ep = usb_endpoint_num(ep_out);
986
987 u8 *buf __free(kfree) = kmalloc(NEXIO_BUFSIZE, GFP_NOIO);
988 if (!buf)
989 return -ENOMEM;
990
991 /* two empty reads */
992 for (i = 0; i < 2; i++) {
993 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
994 buf, NEXIO_BUFSIZE, &actual_len,
995 NEXIO_TIMEOUT);
996 if (ret < 0)
997 return ret;
998 }
999
1000 /* send init command */
1001 memcpy(buf, nexio_init_pkt, sizeof(nexio_init_pkt));
1002 ret = usb_bulk_msg(dev, usb_sndbulkpipe(dev, output_ep),
1003 buf, sizeof(nexio_init_pkt), &actual_len,
1004 NEXIO_TIMEOUT);
1005 if (ret < 0)
1006 return ret;
1007
1008 /* read replies */
1009 for (i = 0; i < 3; i++) {
1010 memset(buf, 0, NEXIO_BUFSIZE);
1011 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
1012 buf, NEXIO_BUFSIZE, &actual_len,
1013 NEXIO_TIMEOUT);
1014 if (ret < 0 || actual_len < 1 || buf[1] != actual_len)
1015 continue;
1016 switch (buf[0]) {
1017 case 0x83: /* firmware version */
1018 if (!firmware_ver)
1019 firmware_ver = kstrdup(&buf[2], GFP_NOIO);
1020 break;
1021 case 0x84: /* device name */
1022 if (!device_name)
1023 device_name = kstrdup(&buf[2], GFP_NOIO);
1024 break;
1025 }
1026 }
1027
1028 printk(KERN_INFO "Nexio device: %s, firmware version: %s\n",
1029 device_name, firmware_ver);
1030
1031 kfree(firmware_ver);
1032 kfree(device_name);
1033
1034 usb_fill_bulk_urb(priv->ack, dev, usb_sndbulkpipe(dev, output_ep),
1035 priv->ack_buf, sizeof(nexio_ack_pkt),
1036 nexio_ack_complete, usbtouch);
1037
1038 return 0;
1039}
1040
1041static void nexio_exit(struct usbtouch_usb *usbtouch)
1042{
1043 struct nexio_priv *priv = usbtouch->priv;
1044
1045 usb_kill_urb(priv->ack);
1046 usb_free_urb(priv->ack);
1047 kfree(priv->ack_buf);
1048 kfree(priv);
1049}
1050
1051static int nexio_read_data(struct usbtouch_usb *usbtouch, unsigned char *pkt)
1052{
1053 struct device *dev = &usbtouch->interface->dev;
1054 struct nexio_touch_packet *packet = (void *) pkt;
1055 struct nexio_priv *priv = usbtouch->priv;
1056 unsigned int data_len = be16_to_cpu(packet->data_len);
1057 unsigned int x_len = be16_to_cpu(packet->x_len);
1058 unsigned int y_len = be16_to_cpu(packet->y_len);
1059 int x, y, begin_x, begin_y, end_x, end_y, w, h, ret;
1060
1061 /* got touch data? */
1062 if ((pkt[0] & 0xe0) != 0xe0)
1063 return 0;
1064
1065 if (data_len > 0xff)
1066 data_len -= 0x100;
1067 if (x_len > 0xff)
1068 x_len -= 0x80;
1069
1070 if (data_len > usbtouch->data_size - sizeof(*packet))
1071 data_len = usbtouch->data_size - sizeof(*packet);
1072 if (x_len > data_len)
1073 x_len = data_len;
1074
1075 /* send ACK */
1076 ret = usb_submit_urb(priv->ack, GFP_ATOMIC);
1077 if (ret)
1078 dev_warn(dev, "Failed to submit ACK URB: %d\n", ret);
1079
1080 if (!input_abs_get_max(usbtouch->input, ABS_X)) {
1081 input_set_abs_params(usbtouch->input, ABS_X,
1082 0, 2 * x_len, 0, 0);
1083 input_set_abs_params(usbtouch->input, ABS_Y,
1084 0, 2 * y_len, 0, 0);
1085 }
1086 /*
1087 * The device reports state of IR sensors on X and Y axes.
1088 * Each byte represents "darkness" percentage (0-100) of one element.
1089 * 17" touchscreen reports only 64 x 52 bytes so the resolution is low.
1090 * This also means that there's a limited multi-touch capability but
1091 * it's disabled (and untested) here as there's no X driver for that.
1092 */
1093 begin_x = end_x = begin_y = end_y = -1;
1094 for (x = 0; x < x_len; x++) {
1095 if (begin_x == -1 && packet->data[x] > NEXIO_THRESHOLD) {
1096 begin_x = x;
1097 continue;
1098 }
1099 if (end_x == -1 && begin_x != -1 && packet->data[x] < NEXIO_THRESHOLD) {
1100 end_x = x - 1;
1101 for (y = x_len; y < data_len; y++) {
1102 if (begin_y == -1 && packet->data[y] > NEXIO_THRESHOLD) {
1103 begin_y = y - x_len;
1104 continue;
1105 }
1106 if (end_y == -1 &&
1107 begin_y != -1 && packet->data[y] < NEXIO_THRESHOLD) {
1108 end_y = y - 1 - x_len;
1109 w = end_x - begin_x;
1110 h = end_y - begin_y;
1111#if 0
1112 /* multi-touch */
1113 input_report_abs(usbtouch->input,
1114 ABS_MT_TOUCH_MAJOR, max(w,h));
1115 input_report_abs(usbtouch->input,
1116 ABS_MT_TOUCH_MINOR, min(x,h));
1117 input_report_abs(usbtouch->input,
1118 ABS_MT_POSITION_X, 2*begin_x+w);
1119 input_report_abs(usbtouch->input,
1120 ABS_MT_POSITION_Y, 2*begin_y+h);
1121 input_report_abs(usbtouch->input,
1122 ABS_MT_ORIENTATION, w > h);
1123 input_mt_sync(usbtouch->input);
1124#endif
1125 /* single touch */
1126 usbtouch->x = 2 * begin_x + w;
1127 usbtouch->y = 2 * begin_y + h;
1128 usbtouch->touch = packet->flags & 0x01;
1129 begin_y = end_y = -1;
1130 return 1;
1131 }
1132 }
1133 begin_x = end_x = -1;
1134 }
1135
1136 }
1137 return 0;
1138}
1139
1140static const struct usbtouch_device_info nexio_dev_info = {
1141 .rept_size = 1024,
1142 .irq_always = true,
1143 .read_data = nexio_read_data,
1144 .alloc = nexio_alloc,
1145 .init = nexio_init,
1146 .exit = nexio_exit,
1147};
1148#endif
1149
1150
1151/*****************************************************************************
1152 * ELO part
1153 */
1154
1155#ifdef CONFIG_TOUCHSCREEN_USB_ELO
1156
1157static int elo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
1158{
1159 dev->x = (pkt[3] << 8) | pkt[2];
1160 dev->y = (pkt[5] << 8) | pkt[4];
1161 dev->touch = pkt[6] > 0;
1162 dev->press = pkt[6];
1163
1164 return 1;
1165}
1166
1167static const struct usbtouch_device_info elo_dev_info = {
1168 .min_xc = 0x0,
1169 .max_xc = 0x0fff,
1170 .min_yc = 0x0,
1171 .max_yc = 0x0fff,
1172 .max_press = 0xff,
1173 .rept_size = 8,
1174 .read_data = elo_read_data,
1175};
1176#endif
1177
1178
1179/*****************************************************************************
1180 * Generic Part
1181 */
1182static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
1183 unsigned char *pkt, int len)
1184{
1185 const struct usbtouch_device_info *type = usbtouch->type;
1186
1187 if (!type->read_data(usbtouch, pkt))
1188 return;
1189
1190 input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch);
1191
1192 if (swap_xy) {
1193 input_report_abs(usbtouch->input, ABS_X, usbtouch->y);
1194 input_report_abs(usbtouch->input, ABS_Y, usbtouch->x);
1195 } else {
1196 input_report_abs(usbtouch->input, ABS_X, usbtouch->x);
1197 input_report_abs(usbtouch->input, ABS_Y, usbtouch->y);
1198 }
1199 if (type->max_press)
1200 input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press);
1201 input_sync(usbtouch->input);
1202}
1203
1204
1205#ifdef MULTI_PACKET
1206static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1207 unsigned char *pkt, int len)
1208{
1209 unsigned char *buffer;
1210 int pkt_len, pos, buf_len, tmp;
1211
1212 /* process buffer */
1213 if (unlikely(usbtouch->buf_len)) {
1214 /* try to get size */
1215 pkt_len = usbtouch->type->get_pkt_len(
1216 usbtouch->buffer, usbtouch->buf_len);
1217
1218 /* drop? */
1219 if (unlikely(!pkt_len))
1220 goto out_flush_buf;
1221
1222 /* need to append -pkt_len bytes before able to get size */
1223 if (unlikely(pkt_len < 0)) {
1224 int append = -pkt_len;
1225 if (unlikely(append > len))
1226 append = len;
1227 if (usbtouch->buf_len + append >= usbtouch->type->rept_size)
1228 goto out_flush_buf;
1229 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append);
1230 usbtouch->buf_len += append;
1231
1232 pkt_len = usbtouch->type->get_pkt_len(
1233 usbtouch->buffer, usbtouch->buf_len);
1234 if (pkt_len < 0)
1235 return;
1236 }
1237
1238 /* append */
1239 tmp = pkt_len - usbtouch->buf_len;
1240 if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size)
1241 goto out_flush_buf;
1242 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp);
1243 usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len);
1244
1245 buffer = pkt + tmp;
1246 buf_len = len - tmp;
1247 } else {
1248 buffer = pkt;
1249 buf_len = len;
1250 }
1251
1252 /* loop over the received packet, process */
1253 pos = 0;
1254 while (pos < buf_len) {
1255 /* get packet len */
1256 pkt_len = usbtouch->type->get_pkt_len(buffer + pos,
1257 buf_len - pos);
1258
1259 /* unknown packet: skip one byte */
1260 if (unlikely(!pkt_len)) {
1261 pos++;
1262 continue;
1263 }
1264
1265 /* full packet: process */
1266 if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) {
1267 usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len);
1268 } else {
1269 /* incomplete packet: save in buffer */
1270 memcpy(usbtouch->buffer, buffer + pos, buf_len - pos);
1271 usbtouch->buf_len = buf_len - pos;
1272 return;
1273 }
1274 pos += pkt_len;
1275 }
1276
1277out_flush_buf:
1278 usbtouch->buf_len = 0;
1279 return;
1280}
1281#else
1282static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1283 unsigned char *pkt, int len)
1284{
1285 dev_WARN_ONCE(&usbtouch->interface->dev, 1,
1286 "Protocol has ->get_pkt_len() without #define MULTI_PACKET");
1287}
1288#endif
1289
1290static void usbtouch_irq(struct urb *urb)
1291{
1292 struct usbtouch_usb *usbtouch = urb->context;
1293 struct device *dev = &usbtouch->interface->dev;
1294 int retval;
1295
1296 switch (urb->status) {
1297 case 0:
1298 /* success */
1299 break;
1300 case -ETIME:
1301 /* this urb is timing out */
1302 dev_dbg(dev,
1303 "%s - urb timed out - was the device unplugged?\n",
1304 __func__);
1305 return;
1306 case -ECONNRESET:
1307 case -ENOENT:
1308 case -ESHUTDOWN:
1309 case -EPIPE:
1310 /* this urb is terminated, clean up */
1311 dev_dbg(dev, "%s - urb shutting down with status: %d\n",
1312 __func__, urb->status);
1313 return;
1314 default:
1315 dev_dbg(dev, "%s - nonzero urb status received: %d\n",
1316 __func__, urb->status);
1317 goto exit;
1318 }
1319
1320 usbtouch->process_pkt(usbtouch, usbtouch->data, urb->actual_length);
1321
1322exit:
1323 usb_mark_last_busy(interface_to_usbdev(usbtouch->interface));
1324 retval = usb_submit_urb(urb, GFP_ATOMIC);
1325 if (retval)
1326 dev_err(dev, "%s - usb_submit_urb failed with result: %d\n",
1327 __func__, retval);
1328}
1329
1330static int usbtouch_start_io(struct usbtouch_usb *usbtouch)
1331{
1332 guard(mutex)(&usbtouch->pm_mutex);
1333
1334 if (!usbtouch->type->irq_always)
1335 if (usb_submit_urb(usbtouch->irq, GFP_KERNEL))
1336 return -EIO;
1337
1338 usbtouch->interface->needs_remote_wakeup = 1;
1339 usbtouch->is_open = true;
1340
1341 return 0;
1342}
1343
1344static int usbtouch_open(struct input_dev *input)
1345{
1346 struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1347 int r;
1348
1349 usbtouch->irq->dev = interface_to_usbdev(usbtouch->interface);
1350
1351 r = usb_autopm_get_interface(usbtouch->interface) ? -EIO : 0;
1352 if (r)
1353 return r;
1354
1355 r = usbtouch_start_io(usbtouch);
1356
1357 usb_autopm_put_interface(usbtouch->interface);
1358 return r;
1359}
1360
1361static void usbtouch_close(struct input_dev *input)
1362{
1363 struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1364 int r;
1365
1366 scoped_guard(mutex, &usbtouch->pm_mutex) {
1367 if (!usbtouch->type->irq_always)
1368 usb_kill_urb(usbtouch->irq);
1369 usbtouch->is_open = false;
1370 }
1371
1372 r = usb_autopm_get_interface(usbtouch->interface);
1373 usbtouch->interface->needs_remote_wakeup = 0;
1374 if (!r)
1375 usb_autopm_put_interface(usbtouch->interface);
1376}
1377
1378static int usbtouch_suspend(struct usb_interface *intf, pm_message_t message)
1379{
1380 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1381
1382 usb_kill_urb(usbtouch->irq);
1383
1384 return 0;
1385}
1386
1387static int usbtouch_resume(struct usb_interface *intf)
1388{
1389 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1390
1391 guard(mutex)(&usbtouch->pm_mutex);
1392
1393 if (usbtouch->is_open || usbtouch->type->irq_always)
1394 return usb_submit_urb(usbtouch->irq, GFP_NOIO);
1395
1396 return 0;
1397}
1398
1399static int usbtouch_reset_resume(struct usb_interface *intf)
1400{
1401 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1402 int err;
1403
1404 /* reinit the device */
1405 if (usbtouch->type->init) {
1406 err = usbtouch->type->init(usbtouch);
1407 if (err) {
1408 dev_dbg(&intf->dev,
1409 "%s - type->init() failed, err: %d\n",
1410 __func__, err);
1411 return err;
1412 }
1413 }
1414
1415 /* restart IO if needed */
1416 guard(mutex)(&usbtouch->pm_mutex);
1417
1418 if (usbtouch->is_open)
1419 return usb_submit_urb(usbtouch->irq, GFP_NOIO);
1420
1421 return 0;
1422}
1423
1424static void usbtouch_free_buffers(struct usb_device *udev,
1425 struct usbtouch_usb *usbtouch)
1426{
1427 usb_free_coherent(udev, usbtouch->data_size,
1428 usbtouch->data, usbtouch->data_dma);
1429 kfree(usbtouch->buffer);
1430}
1431
1432static int usbtouch_probe(struct usb_interface *intf,
1433 const struct usb_device_id *id)
1434{
1435 struct usbtouch_usb *usbtouch;
1436 struct input_dev *input_dev;
1437 struct usb_endpoint_descriptor *endpoint;
1438 struct usb_device *udev = interface_to_usbdev(intf);
1439 const struct usbtouch_device_info *type;
1440 int err;
1441
1442 /* some devices are ignored */
1443 type = (const struct usbtouch_device_info *)id->driver_info;
1444 if (!type)
1445 return -ENODEV;
1446
1447 err = usb_find_int_in_endpoint(intf->cur_altsetting, &endpoint);
1448 if (err) {
1449 err = usb_find_bulk_in_endpoint(intf->cur_altsetting, &endpoint);
1450 if (err)
1451 return -ENXIO;
1452 }
1453
1454 err = -ENOMEM;
1455 usbtouch = kzalloc_obj(*usbtouch);
1456 input_dev = input_allocate_device();
1457 if (!usbtouch || !input_dev)
1458 goto out_free;
1459
1460 mutex_init(&usbtouch->pm_mutex);
1461 usbtouch->type = type;
1462
1463 usbtouch->data_size = type->rept_size;
1464 if (type->get_pkt_len) {
1465 /*
1466 * When dealing with variable-length packets we should
1467 * not request more than wMaxPacketSize bytes at once
1468 * as we do not know if there is more data coming or
1469 * we filled exactly wMaxPacketSize bytes and there is
1470 * nothing else.
1471 */
1472 usbtouch->data_size = min(usbtouch->data_size,
1473 usb_endpoint_maxp(endpoint));
1474 }
1475
1476 usbtouch->data = usb_alloc_coherent(udev, usbtouch->data_size,
1477 GFP_KERNEL, &usbtouch->data_dma);
1478 if (!usbtouch->data)
1479 goto out_free;
1480
1481 if (type->get_pkt_len) {
1482 usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL);
1483 if (!usbtouch->buffer)
1484 goto out_free_buffers;
1485 usbtouch->process_pkt = usbtouch_process_multi;
1486 } else {
1487 usbtouch->process_pkt = usbtouch_process_pkt;
1488 }
1489
1490 usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
1491 if (!usbtouch->irq) {
1492 dev_dbg(&intf->dev,
1493 "%s - usb_alloc_urb failed: usbtouch->irq\n", __func__);
1494 goto out_free_buffers;
1495 }
1496
1497 usbtouch->interface = intf;
1498 usbtouch->input = input_dev;
1499
1500 if (udev->manufacturer)
1501 strscpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name));
1502
1503 if (udev->product) {
1504 if (udev->manufacturer)
1505 strlcat(usbtouch->name, " ", sizeof(usbtouch->name));
1506 strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name));
1507 }
1508
1509 if (!strlen(usbtouch->name))
1510 snprintf(usbtouch->name, sizeof(usbtouch->name),
1511 "USB Touchscreen %04x:%04x",
1512 le16_to_cpu(udev->descriptor.idVendor),
1513 le16_to_cpu(udev->descriptor.idProduct));
1514
1515 usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys));
1516 strlcat(usbtouch->phys, "/input0", sizeof(usbtouch->phys));
1517
1518 input_dev->name = usbtouch->name;
1519 input_dev->phys = usbtouch->phys;
1520 usb_to_input_id(udev, &input_dev->id);
1521 input_dev->dev.parent = &intf->dev;
1522
1523 input_set_drvdata(input_dev, usbtouch);
1524
1525 input_dev->open = usbtouch_open;
1526 input_dev->close = usbtouch_close;
1527
1528 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
1529 input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
1530 input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0);
1531 input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0);
1532 if (type->max_press)
1533 input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press,
1534 type->max_press, 0, 0);
1535
1536 if (usb_endpoint_type(endpoint) == USB_ENDPOINT_XFER_INT)
1537 usb_fill_int_urb(usbtouch->irq, udev,
1538 usb_rcvintpipe(udev, endpoint->bEndpointAddress),
1539 usbtouch->data, usbtouch->data_size,
1540 usbtouch_irq, usbtouch, endpoint->bInterval);
1541 else
1542 usb_fill_bulk_urb(usbtouch->irq, udev,
1543 usb_rcvbulkpipe(udev, endpoint->bEndpointAddress),
1544 usbtouch->data, usbtouch->data_size,
1545 usbtouch_irq, usbtouch);
1546
1547 usbtouch->irq->dev = udev;
1548 usbtouch->irq->transfer_dma = usbtouch->data_dma;
1549 usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1550
1551 /* device specific allocations */
1552 if (type->alloc) {
1553 err = type->alloc(usbtouch);
1554 if (err) {
1555 dev_dbg(&intf->dev,
1556 "%s - type->alloc() failed, err: %d\n",
1557 __func__, err);
1558 goto out_free_urb;
1559 }
1560 }
1561
1562 /* device specific initialisation*/
1563 if (type->init) {
1564 err = type->init(usbtouch);
1565 if (err) {
1566 dev_dbg(&intf->dev,
1567 "%s - type->init() failed, err: %d\n",
1568 __func__, err);
1569 goto out_do_exit;
1570 }
1571 }
1572
1573 err = input_register_device(usbtouch->input);
1574 if (err) {
1575 dev_dbg(&intf->dev,
1576 "%s - input_register_device failed, err: %d\n",
1577 __func__, err);
1578 goto out_do_exit;
1579 }
1580
1581 usb_set_intfdata(intf, usbtouch);
1582
1583 if (usbtouch->type->irq_always) {
1584 /* this can't fail */
1585 usb_autopm_get_interface(intf);
1586 err = usb_submit_urb(usbtouch->irq, GFP_KERNEL);
1587 if (err) {
1588 usb_autopm_put_interface(intf);
1589 dev_err(&intf->dev,
1590 "%s - usb_submit_urb failed with result: %d\n",
1591 __func__, err);
1592 goto out_unregister_input;
1593 }
1594 }
1595
1596 return 0;
1597
1598out_unregister_input:
1599 input_unregister_device(input_dev);
1600 input_dev = NULL;
1601out_do_exit:
1602 if (type->exit)
1603 type->exit(usbtouch);
1604out_free_urb:
1605 usb_free_urb(usbtouch->irq);
1606out_free_buffers:
1607 usbtouch_free_buffers(udev, usbtouch);
1608out_free:
1609 input_free_device(input_dev);
1610 kfree(usbtouch);
1611 return err;
1612}
1613
1614static void usbtouch_disconnect(struct usb_interface *intf)
1615{
1616 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1617
1618 if (!usbtouch)
1619 return;
1620
1621 dev_dbg(&intf->dev,
1622 "%s - usbtouch is initialized, cleaning up\n", __func__);
1623
1624 usb_set_intfdata(intf, NULL);
1625 /* this will stop IO via close */
1626 input_unregister_device(usbtouch->input);
1627 usb_free_urb(usbtouch->irq);
1628 if (usbtouch->type->exit)
1629 usbtouch->type->exit(usbtouch);
1630 usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch);
1631 kfree(usbtouch);
1632}
1633
1634static const struct attribute_group *usbtouch_groups[] = {
1635#ifdef CONFIG_TOUCHSCREEN_USB_3M
1636 &mtouch_attr_group,
1637#endif
1638 NULL
1639};
1640
1641static const struct usb_device_id usbtouch_devices[] = {
1642#ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
1643 /* ignore the HID capable devices, handled by usbhid */
1644 { USB_DEVICE_INTERFACE_CLASS(0x0eef, 0x0001, USB_INTERFACE_CLASS_HID),
1645 .driver_info = 0 },
1646 { USB_DEVICE_INTERFACE_CLASS(0x0eef, 0x0002, USB_INTERFACE_CLASS_HID),
1647 .driver_info = 0 },
1648
1649 /* normal device IDs */
1650 { USB_DEVICE(0x3823, 0x0001),
1651 .driver_info = (kernel_ulong_t)&egalax_dev_info },
1652 { USB_DEVICE(0x3823, 0x0002),
1653 .driver_info = (kernel_ulong_t)&egalax_dev_info },
1654 { USB_DEVICE(0x0123, 0x0001),
1655 .driver_info = (kernel_ulong_t)&egalax_dev_info },
1656 { USB_DEVICE(0x0eef, 0x0001),
1657 .driver_info = (kernel_ulong_t)&egalax_dev_info },
1658 { USB_DEVICE(0x0eef, 0x0002),
1659 .driver_info = (kernel_ulong_t)&egalax_dev_info },
1660 { USB_DEVICE(0x1234, 0x0001),
1661 .driver_info = (kernel_ulong_t)&egalax_dev_info },
1662 { USB_DEVICE(0x1234, 0x0002),
1663 .driver_info = (kernel_ulong_t)&egalax_dev_info },
1664#endif
1665
1666#ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
1667 { USB_DEVICE(0x134c, 0x0001),
1668 .driver_info = (kernel_ulong_t)&panjit_dev_info },
1669 { USB_DEVICE(0x134c, 0x0002),
1670 .driver_info = (kernel_ulong_t)&panjit_dev_info },
1671 { USB_DEVICE(0x134c, 0x0003),
1672 .driver_info = (kernel_ulong_t)&panjit_dev_info },
1673 { USB_DEVICE(0x134c, 0x0004),
1674 .driver_info = (kernel_ulong_t)&panjit_dev_info },
1675#endif
1676
1677#ifdef CONFIG_TOUCHSCREEN_USB_3M
1678 { USB_DEVICE(0x0596, 0x0001),
1679 .driver_info = (kernel_ulong_t)&mtouch_dev_info },
1680#endif
1681
1682#ifdef CONFIG_TOUCHSCREEN_USB_ITM
1683 { USB_DEVICE(0x0403, 0xf9e9),
1684 .driver_info = (kernel_ulong_t)&itm_dev_info },
1685 { USB_DEVICE(0x16e3, 0xf9e9),
1686 .driver_info = (kernel_ulong_t)&itm_dev_info },
1687#endif
1688
1689#ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
1690 { USB_DEVICE(0x1234, 0x5678),
1691 .driver_info = (kernel_ulong_t)&eturbo_dev_info },
1692#endif
1693
1694#ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
1695 { USB_DEVICE(0x0637, 0x0001),
1696 .driver_info = (kernel_ulong_t)&gunze_dev_info },
1697#endif
1698
1699#ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
1700 { USB_DEVICE(0x0afa, 0x03e8),
1701 .driver_info = (kernel_ulong_t)&dmc_tsc10_dev_info },
1702#endif
1703
1704#ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
1705 { USB_DEVICE(0x255e, 0x0001),
1706 .driver_info = (kernel_ulong_t)&irtouch_dev_info },
1707 { USB_DEVICE(0x595a, 0x0001),
1708 .driver_info = (kernel_ulong_t)&irtouch_dev_info },
1709 { USB_DEVICE(0x6615, 0x0001),
1710 .driver_info = (kernel_ulong_t)&irtouch_dev_info },
1711 { USB_DEVICE(0x6615, 0x0012),
1712 .driver_info = (kernel_ulong_t)&irtouch_hires_dev_info },
1713#endif
1714
1715#ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
1716 { USB_DEVICE(0x1391, 0x1000),
1717 .driver_info = (kernel_ulong_t)&idealtek_dev_info },
1718#endif
1719
1720#ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
1721 { USB_DEVICE(0x0dfc, 0x0001),
1722 .driver_info = (kernel_ulong_t)&general_touch_dev_info },
1723#endif
1724
1725#ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
1726 { USB_DEVICE(0x08f2, 0x007f),
1727 .driver_info = (kernel_ulong_t)&gotop_dev_info },
1728 { USB_DEVICE(0x08f2, 0x00ce),
1729 .driver_info = (kernel_ulong_t)&gotop_dev_info },
1730 { USB_DEVICE(0x08f2, 0x00f4),
1731 .driver_info = (kernel_ulong_t)&gotop_dev_info },
1732#endif
1733
1734#ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
1735 { USB_DEVICE(0x0f92, 0x0001),
1736 .driver_info = (kernel_ulong_t)&jastec_dev_info },
1737#endif
1738
1739#ifdef CONFIG_TOUCHSCREEN_USB_E2I
1740 { USB_DEVICE(0x1ac7, 0x0001),
1741 .driver_info = (kernel_ulong_t)&e2i_dev_info },
1742#endif
1743
1744#ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
1745 { USB_DEVICE(0x14c8, 0x0003),
1746 .driver_info = (kernel_ulong_t)&zytronic_dev_info },
1747#endif
1748
1749#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
1750 /* TC5UH */
1751 { USB_DEVICE(0x0664, 0x0309),
1752 .driver_info = (kernel_ulong_t)&tc45usb_dev_info },
1753 /* TC4UM */
1754 { USB_DEVICE(0x0664, 0x0306),
1755 .driver_info = (kernel_ulong_t)&tc45usb_dev_info },
1756#endif
1757
1758#ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
1759 /* data interface only */
1760 { USB_DEVICE_AND_INTERFACE_INFO(0x10f0, 0x2002, 0x0a, 0x00, 0x00),
1761 .driver_info = (kernel_ulong_t)&nexio_dev_info },
1762 { USB_DEVICE_AND_INTERFACE_INFO(0x1870, 0x0001, 0x0a, 0x00, 0x00),
1763 .driver_info = (kernel_ulong_t)&nexio_dev_info },
1764#endif
1765
1766#ifdef CONFIG_TOUCHSCREEN_USB_ELO
1767 { USB_DEVICE(0x04e7, 0x0020),
1768 .driver_info = (kernel_ulong_t)&elo_dev_info },
1769#endif
1770
1771#ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
1772 { USB_DEVICE(0x7374, 0x0001),
1773 .driver_info = (kernel_ulong_t)&etouch_dev_info },
1774#endif
1775
1776 { }
1777};
1778MODULE_DEVICE_TABLE(usb, usbtouch_devices);
1779
1780static struct usb_driver usbtouch_driver = {
1781 .name = "usbtouchscreen",
1782 .probe = usbtouch_probe,
1783 .disconnect = usbtouch_disconnect,
1784 .suspend = usbtouch_suspend,
1785 .resume = usbtouch_resume,
1786 .reset_resume = usbtouch_reset_resume,
1787 .id_table = usbtouch_devices,
1788 .dev_groups = usbtouch_groups,
1789 .supports_autosuspend = 1,
1790};
1791
1792module_usb_driver(usbtouch_driver);
1793
1794MODULE_AUTHOR("Daniel Ritz <[email protected]>");
1795MODULE_DESCRIPTION("USB Touchscreen Driver");
1796MODULE_LICENSE("GPL");
1797
1798MODULE_ALIAS("touchkitusb");
1799MODULE_ALIAS("itmtouch");
1800MODULE_ALIAS("mtouchusb");