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
46 static bool swap_xy;
47 module_param(swap_xy, bool, 0644);
48 MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");
49
50 static bool hwcalib_xy;
51 module_param(hwcalib_xy, bool, 0644);
52 MODULE_PARM_DESC(hwcalib_xy, "If set hw-calibrated X/Y are used if available");
53
54 /* device specifc data/functions */
55 struct usbtouch_usb;
56 struct 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 */
86 struct 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
e2i_init(struct usbtouch_usb * usbtouch)114 static 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
e2i_read_data(struct usbtouch_usb * dev,unsigned char * pkt)129 static 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
142 static 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
egalax_init(struct usbtouch_usb * usbtouch)168 static 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
egalax_read_data(struct usbtouch_usb * dev,unsigned char * pkt)200 static 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
egalax_get_pkt_len(unsigned char * buf,int len)212 static 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
228 static 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
etouch_read_data(struct usbtouch_usb * dev,unsigned char * pkt)255 static 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
etouch_get_pkt_len(unsigned char * buf,int len)268 static 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
285 static 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
panjit_read_data(struct usbtouch_usb * dev,unsigned char * pkt)300 static 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
309 static 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
mtouch_read_data(struct usbtouch_usb * dev,unsigned char * pkt)331 static 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
345 struct mtouch_priv {
346 u8 fw_rev_major;
347 u8 fw_rev_minor;
348 };
349
mtouch_get_fw_revision(struct usbtouch_usb * usbtouch)350 static 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
mtouch_alloc(struct usbtouch_usb * usbtouch)377 static int mtouch_alloc(struct usbtouch_usb *usbtouch)
378 {
379 struct mtouch_priv *priv;
380
381 priv = kmalloc(sizeof(*priv), GFP_KERNEL);
382 if (!priv)
383 return -ENOMEM;
384
385 usbtouch->priv = priv;
386 return 0;
387 }
388
mtouch_init(struct usbtouch_usb * usbtouch)389 static 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
mtouch_exit(struct usbtouch_usb * usbtouch)432 static void mtouch_exit(struct usbtouch_usb *usbtouch)
433 {
434 struct mtouch_priv *priv = usbtouch->priv;
435
436 kfree(priv);
437 }
438
439 static 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
mtouch_firmware_rev_show(struct device * dev,struct device_attribute * attr,char * output)451 static 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 }
461 static DEVICE_ATTR(firmware_rev, 0444, mtouch_firmware_rev_show, NULL);
462
463 static struct attribute *mtouch_attrs[] = {
464 &dev_attr_firmware_rev.attr,
465 NULL
466 };
467
mtouch_group_visible(struct kobject * kobj)468 static 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
477 DEFINE_SIMPLE_SYSFS_GROUP_VISIBLE(mtouch);
478
479 static 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
itm_read_data(struct usbtouch_usb * dev,unsigned char * pkt)490 static 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
518 static 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
eturbo_read_data(struct usbtouch_usb * dev,unsigned char * pkt)537 static 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
eturbo_get_pkt_len(unsigned char * buf,int len)553 static 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
562 static 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
gunze_read_data(struct usbtouch_usb * dev,unsigned char * pkt)578 static 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
590 static 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
dmc_tsc10_init(struct usbtouch_usb * usbtouch)623 static 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
dmc_tsc10_read_data(struct usbtouch_usb * dev,unsigned char * pkt)666 static 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
675 static 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
irtouch_read_data(struct usbtouch_usb * dev,unsigned char * pkt)691 static 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
700 static 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
709 static 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
tc45usb_read_data(struct usbtouch_usb * dev,unsigned char * pkt)723 static 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
732 static 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
idealtek_get_pkt_len(unsigned char * buf,int len)749 static 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
idealtek_read_data(struct usbtouch_usb * dev,unsigned char * pkt)758 static 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
780 static 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
general_touch_read_data(struct usbtouch_usb * dev,unsigned char * pkt)795 static 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
805 static 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
gotop_read_data(struct usbtouch_usb * dev,unsigned char * pkt)819 static 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
828 static 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
jastec_read_data(struct usbtouch_usb * dev,unsigned char * pkt)842 static 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
851 static 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
zytronic_read_data(struct usbtouch_usb * dev,unsigned char * pkt)865 static 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
896 static 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
916 struct nexio_priv {
917 struct urb *ack;
918 unsigned char *ack_buf;
919 };
920
921 struct 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
929 static unsigned char nexio_ack_pkt[2] = { 0xaa, 0x02 };
930 static unsigned char nexio_init_pkt[4] = { 0x82, 0x04, 0x0a, 0x0f };
931
nexio_ack_complete(struct urb * urb)932 static void nexio_ack_complete(struct urb *urb)
933 {
934 }
935
nexio_alloc(struct usbtouch_usb * usbtouch)936 static int nexio_alloc(struct usbtouch_usb *usbtouch)
937 {
938 struct nexio_priv *priv;
939 int ret = -ENOMEM;
940
941 priv = kmalloc(sizeof(*priv), GFP_KERNEL);
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
960 err_ack_buf:
961 kfree(priv->ack_buf);
962 err_priv:
963 kfree(priv);
964 out_buf:
965 return ret;
966 }
967
nexio_init(struct usbtouch_usb * usbtouch)968 static 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 nexio_priv *priv = usbtouch->priv;
973 int ret = -ENOMEM;
974 int actual_len, i;
975 char *firmware_ver = NULL, *device_name = NULL;
976 int input_ep = 0, output_ep = 0;
977
978 /* find first input and output endpoint */
979 for (i = 0; i < interface->desc.bNumEndpoints; i++) {
980 if (!input_ep &&
981 usb_endpoint_dir_in(&interface->endpoint[i].desc))
982 input_ep = interface->endpoint[i].desc.bEndpointAddress;
983 if (!output_ep &&
984 usb_endpoint_dir_out(&interface->endpoint[i].desc))
985 output_ep = interface->endpoint[i].desc.bEndpointAddress;
986 }
987 if (!input_ep || !output_ep)
988 return -ENXIO;
989
990 u8 *buf __free(kfree) = kmalloc(NEXIO_BUFSIZE, GFP_NOIO);
991 if (!buf)
992 return -ENOMEM;
993
994 /* two empty reads */
995 for (i = 0; i < 2; i++) {
996 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
997 buf, NEXIO_BUFSIZE, &actual_len,
998 NEXIO_TIMEOUT);
999 if (ret < 0)
1000 return ret;
1001 }
1002
1003 /* send init command */
1004 memcpy(buf, nexio_init_pkt, sizeof(nexio_init_pkt));
1005 ret = usb_bulk_msg(dev, usb_sndbulkpipe(dev, output_ep),
1006 buf, sizeof(nexio_init_pkt), &actual_len,
1007 NEXIO_TIMEOUT);
1008 if (ret < 0)
1009 return ret;
1010
1011 /* read replies */
1012 for (i = 0; i < 3; i++) {
1013 memset(buf, 0, NEXIO_BUFSIZE);
1014 ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
1015 buf, NEXIO_BUFSIZE, &actual_len,
1016 NEXIO_TIMEOUT);
1017 if (ret < 0 || actual_len < 1 || buf[1] != actual_len)
1018 continue;
1019 switch (buf[0]) {
1020 case 0x83: /* firmware version */
1021 if (!firmware_ver)
1022 firmware_ver = kstrdup(&buf[2], GFP_NOIO);
1023 break;
1024 case 0x84: /* device name */
1025 if (!device_name)
1026 device_name = kstrdup(&buf[2], GFP_NOIO);
1027 break;
1028 }
1029 }
1030
1031 printk(KERN_INFO "Nexio device: %s, firmware version: %s\n",
1032 device_name, firmware_ver);
1033
1034 kfree(firmware_ver);
1035 kfree(device_name);
1036
1037 usb_fill_bulk_urb(priv->ack, dev, usb_sndbulkpipe(dev, output_ep),
1038 priv->ack_buf, sizeof(nexio_ack_pkt),
1039 nexio_ack_complete, usbtouch);
1040
1041 return 0;
1042 }
1043
nexio_exit(struct usbtouch_usb * usbtouch)1044 static void nexio_exit(struct usbtouch_usb *usbtouch)
1045 {
1046 struct nexio_priv *priv = usbtouch->priv;
1047
1048 usb_kill_urb(priv->ack);
1049 usb_free_urb(priv->ack);
1050 kfree(priv->ack_buf);
1051 kfree(priv);
1052 }
1053
nexio_read_data(struct usbtouch_usb * usbtouch,unsigned char * pkt)1054 static int nexio_read_data(struct usbtouch_usb *usbtouch, unsigned char *pkt)
1055 {
1056 struct device *dev = &usbtouch->interface->dev;
1057 struct nexio_touch_packet *packet = (void *) pkt;
1058 struct nexio_priv *priv = usbtouch->priv;
1059 unsigned int data_len = be16_to_cpu(packet->data_len);
1060 unsigned int x_len = be16_to_cpu(packet->x_len);
1061 unsigned int y_len = be16_to_cpu(packet->y_len);
1062 int x, y, begin_x, begin_y, end_x, end_y, w, h, ret;
1063
1064 /* got touch data? */
1065 if ((pkt[0] & 0xe0) != 0xe0)
1066 return 0;
1067
1068 if (data_len > 0xff)
1069 data_len -= 0x100;
1070 if (x_len > 0xff)
1071 x_len -= 0x80;
1072
1073 /* send ACK */
1074 ret = usb_submit_urb(priv->ack, GFP_ATOMIC);
1075 if (ret)
1076 dev_warn(dev, "Failed to submit ACK URB: %d\n", ret);
1077
1078 if (!input_abs_get_max(usbtouch->input, ABS_X)) {
1079 input_set_abs_params(usbtouch->input, ABS_X,
1080 0, 2 * x_len, 0, 0);
1081 input_set_abs_params(usbtouch->input, ABS_Y,
1082 0, 2 * y_len, 0, 0);
1083 }
1084 /*
1085 * The device reports state of IR sensors on X and Y axes.
1086 * Each byte represents "darkness" percentage (0-100) of one element.
1087 * 17" touchscreen reports only 64 x 52 bytes so the resolution is low.
1088 * This also means that there's a limited multi-touch capability but
1089 * it's disabled (and untested) here as there's no X driver for that.
1090 */
1091 begin_x = end_x = begin_y = end_y = -1;
1092 for (x = 0; x < x_len; x++) {
1093 if (begin_x == -1 && packet->data[x] > NEXIO_THRESHOLD) {
1094 begin_x = x;
1095 continue;
1096 }
1097 if (end_x == -1 && begin_x != -1 && packet->data[x] < NEXIO_THRESHOLD) {
1098 end_x = x - 1;
1099 for (y = x_len; y < data_len; y++) {
1100 if (begin_y == -1 && packet->data[y] > NEXIO_THRESHOLD) {
1101 begin_y = y - x_len;
1102 continue;
1103 }
1104 if (end_y == -1 &&
1105 begin_y != -1 && packet->data[y] < NEXIO_THRESHOLD) {
1106 end_y = y - 1 - x_len;
1107 w = end_x - begin_x;
1108 h = end_y - begin_y;
1109 #if 0
1110 /* multi-touch */
1111 input_report_abs(usbtouch->input,
1112 ABS_MT_TOUCH_MAJOR, max(w,h));
1113 input_report_abs(usbtouch->input,
1114 ABS_MT_TOUCH_MINOR, min(x,h));
1115 input_report_abs(usbtouch->input,
1116 ABS_MT_POSITION_X, 2*begin_x+w);
1117 input_report_abs(usbtouch->input,
1118 ABS_MT_POSITION_Y, 2*begin_y+h);
1119 input_report_abs(usbtouch->input,
1120 ABS_MT_ORIENTATION, w > h);
1121 input_mt_sync(usbtouch->input);
1122 #endif
1123 /* single touch */
1124 usbtouch->x = 2 * begin_x + w;
1125 usbtouch->y = 2 * begin_y + h;
1126 usbtouch->touch = packet->flags & 0x01;
1127 begin_y = end_y = -1;
1128 return 1;
1129 }
1130 }
1131 begin_x = end_x = -1;
1132 }
1133
1134 }
1135 return 0;
1136 }
1137
1138 static const struct usbtouch_device_info nexio_dev_info = {
1139 .rept_size = 1024,
1140 .irq_always = true,
1141 .read_data = nexio_read_data,
1142 .alloc = nexio_alloc,
1143 .init = nexio_init,
1144 .exit = nexio_exit,
1145 };
1146 #endif
1147
1148
1149 /*****************************************************************************
1150 * ELO part
1151 */
1152
1153 #ifdef CONFIG_TOUCHSCREEN_USB_ELO
1154
elo_read_data(struct usbtouch_usb * dev,unsigned char * pkt)1155 static int elo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
1156 {
1157 dev->x = (pkt[3] << 8) | pkt[2];
1158 dev->y = (pkt[5] << 8) | pkt[4];
1159 dev->touch = pkt[6] > 0;
1160 dev->press = pkt[6];
1161
1162 return 1;
1163 }
1164
1165 static const struct usbtouch_device_info elo_dev_info = {
1166 .min_xc = 0x0,
1167 .max_xc = 0x0fff,
1168 .min_yc = 0x0,
1169 .max_yc = 0x0fff,
1170 .max_press = 0xff,
1171 .rept_size = 8,
1172 .read_data = elo_read_data,
1173 };
1174 #endif
1175
1176
1177 /*****************************************************************************
1178 * Generic Part
1179 */
usbtouch_process_pkt(struct usbtouch_usb * usbtouch,unsigned char * pkt,int len)1180 static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
1181 unsigned char *pkt, int len)
1182 {
1183 const struct usbtouch_device_info *type = usbtouch->type;
1184
1185 if (!type->read_data(usbtouch, pkt))
1186 return;
1187
1188 input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch);
1189
1190 if (swap_xy) {
1191 input_report_abs(usbtouch->input, ABS_X, usbtouch->y);
1192 input_report_abs(usbtouch->input, ABS_Y, usbtouch->x);
1193 } else {
1194 input_report_abs(usbtouch->input, ABS_X, usbtouch->x);
1195 input_report_abs(usbtouch->input, ABS_Y, usbtouch->y);
1196 }
1197 if (type->max_press)
1198 input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press);
1199 input_sync(usbtouch->input);
1200 }
1201
1202
1203 #ifdef MULTI_PACKET
usbtouch_process_multi(struct usbtouch_usb * usbtouch,unsigned char * pkt,int len)1204 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1205 unsigned char *pkt, int len)
1206 {
1207 unsigned char *buffer;
1208 int pkt_len, pos, buf_len, tmp;
1209
1210 /* process buffer */
1211 if (unlikely(usbtouch->buf_len)) {
1212 /* try to get size */
1213 pkt_len = usbtouch->type->get_pkt_len(
1214 usbtouch->buffer, usbtouch->buf_len);
1215
1216 /* drop? */
1217 if (unlikely(!pkt_len))
1218 goto out_flush_buf;
1219
1220 /* need to append -pkt_len bytes before able to get size */
1221 if (unlikely(pkt_len < 0)) {
1222 int append = -pkt_len;
1223 if (unlikely(append > len))
1224 append = len;
1225 if (usbtouch->buf_len + append >= usbtouch->type->rept_size)
1226 goto out_flush_buf;
1227 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append);
1228 usbtouch->buf_len += append;
1229
1230 pkt_len = usbtouch->type->get_pkt_len(
1231 usbtouch->buffer, usbtouch->buf_len);
1232 if (pkt_len < 0)
1233 return;
1234 }
1235
1236 /* append */
1237 tmp = pkt_len - usbtouch->buf_len;
1238 if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size)
1239 goto out_flush_buf;
1240 memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp);
1241 usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len);
1242
1243 buffer = pkt + tmp;
1244 buf_len = len - tmp;
1245 } else {
1246 buffer = pkt;
1247 buf_len = len;
1248 }
1249
1250 /* loop over the received packet, process */
1251 pos = 0;
1252 while (pos < buf_len) {
1253 /* get packet len */
1254 pkt_len = usbtouch->type->get_pkt_len(buffer + pos,
1255 buf_len - pos);
1256
1257 /* unknown packet: skip one byte */
1258 if (unlikely(!pkt_len)) {
1259 pos++;
1260 continue;
1261 }
1262
1263 /* full packet: process */
1264 if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) {
1265 usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len);
1266 } else {
1267 /* incomplete packet: save in buffer */
1268 memcpy(usbtouch->buffer, buffer + pos, buf_len - pos);
1269 usbtouch->buf_len = buf_len - pos;
1270 return;
1271 }
1272 pos += pkt_len;
1273 }
1274
1275 out_flush_buf:
1276 usbtouch->buf_len = 0;
1277 return;
1278 }
1279 #else
usbtouch_process_multi(struct usbtouch_usb * usbtouch,unsigned char * pkt,int len)1280 static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
1281 unsigned char *pkt, int len)
1282 {
1283 dev_WARN_ONCE(&usbtouch->interface->dev, 1,
1284 "Protocol has ->get_pkt_len() without #define MULTI_PACKET");
1285 }
1286 #endif
1287
usbtouch_irq(struct urb * urb)1288 static void usbtouch_irq(struct urb *urb)
1289 {
1290 struct usbtouch_usb *usbtouch = urb->context;
1291 struct device *dev = &usbtouch->interface->dev;
1292 int retval;
1293
1294 switch (urb->status) {
1295 case 0:
1296 /* success */
1297 break;
1298 case -ETIME:
1299 /* this urb is timing out */
1300 dev_dbg(dev,
1301 "%s - urb timed out - was the device unplugged?\n",
1302 __func__);
1303 return;
1304 case -ECONNRESET:
1305 case -ENOENT:
1306 case -ESHUTDOWN:
1307 case -EPIPE:
1308 /* this urb is terminated, clean up */
1309 dev_dbg(dev, "%s - urb shutting down with status: %d\n",
1310 __func__, urb->status);
1311 return;
1312 default:
1313 dev_dbg(dev, "%s - nonzero urb status received: %d\n",
1314 __func__, urb->status);
1315 goto exit;
1316 }
1317
1318 usbtouch->process_pkt(usbtouch, usbtouch->data, urb->actual_length);
1319
1320 exit:
1321 usb_mark_last_busy(interface_to_usbdev(usbtouch->interface));
1322 retval = usb_submit_urb(urb, GFP_ATOMIC);
1323 if (retval)
1324 dev_err(dev, "%s - usb_submit_urb failed with result: %d\n",
1325 __func__, retval);
1326 }
1327
usbtouch_start_io(struct usbtouch_usb * usbtouch)1328 static int usbtouch_start_io(struct usbtouch_usb *usbtouch)
1329 {
1330 guard(mutex)(&usbtouch->pm_mutex);
1331
1332 if (!usbtouch->type->irq_always)
1333 if (usb_submit_urb(usbtouch->irq, GFP_KERNEL))
1334 return -EIO;
1335
1336 usbtouch->interface->needs_remote_wakeup = 1;
1337 usbtouch->is_open = true;
1338
1339 return 0;
1340 }
1341
usbtouch_open(struct input_dev * input)1342 static int usbtouch_open(struct input_dev *input)
1343 {
1344 struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1345 int r;
1346
1347 usbtouch->irq->dev = interface_to_usbdev(usbtouch->interface);
1348
1349 r = usb_autopm_get_interface(usbtouch->interface) ? -EIO : 0;
1350 if (r)
1351 return r;
1352
1353 r = usbtouch_start_io(usbtouch);
1354
1355 usb_autopm_put_interface(usbtouch->interface);
1356 return r;
1357 }
1358
usbtouch_close(struct input_dev * input)1359 static void usbtouch_close(struct input_dev *input)
1360 {
1361 struct usbtouch_usb *usbtouch = input_get_drvdata(input);
1362 int r;
1363
1364 scoped_guard(mutex, &usbtouch->pm_mutex) {
1365 if (!usbtouch->type->irq_always)
1366 usb_kill_urb(usbtouch->irq);
1367 usbtouch->is_open = false;
1368 }
1369
1370 r = usb_autopm_get_interface(usbtouch->interface);
1371 usbtouch->interface->needs_remote_wakeup = 0;
1372 if (!r)
1373 usb_autopm_put_interface(usbtouch->interface);
1374 }
1375
usbtouch_suspend(struct usb_interface * intf,pm_message_t message)1376 static int usbtouch_suspend(struct usb_interface *intf, pm_message_t message)
1377 {
1378 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1379
1380 usb_kill_urb(usbtouch->irq);
1381
1382 return 0;
1383 }
1384
usbtouch_resume(struct usb_interface * intf)1385 static int usbtouch_resume(struct usb_interface *intf)
1386 {
1387 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1388
1389 guard(mutex)(&usbtouch->pm_mutex);
1390
1391 if (usbtouch->is_open || usbtouch->type->irq_always)
1392 return usb_submit_urb(usbtouch->irq, GFP_NOIO);
1393
1394 return 0;
1395 }
1396
usbtouch_reset_resume(struct usb_interface * intf)1397 static int usbtouch_reset_resume(struct usb_interface *intf)
1398 {
1399 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1400 int err;
1401
1402 /* reinit the device */
1403 if (usbtouch->type->init) {
1404 err = usbtouch->type->init(usbtouch);
1405 if (err) {
1406 dev_dbg(&intf->dev,
1407 "%s - type->init() failed, err: %d\n",
1408 __func__, err);
1409 return err;
1410 }
1411 }
1412
1413 /* restart IO if needed */
1414 guard(mutex)(&usbtouch->pm_mutex);
1415
1416 if (usbtouch->is_open)
1417 return usb_submit_urb(usbtouch->irq, GFP_NOIO);
1418
1419 return 0;
1420 }
1421
usbtouch_free_buffers(struct usb_device * udev,struct usbtouch_usb * usbtouch)1422 static void usbtouch_free_buffers(struct usb_device *udev,
1423 struct usbtouch_usb *usbtouch)
1424 {
1425 usb_free_coherent(udev, usbtouch->data_size,
1426 usbtouch->data, usbtouch->data_dma);
1427 kfree(usbtouch->buffer);
1428 }
1429
1430 static struct usb_endpoint_descriptor *
usbtouch_get_input_endpoint(struct usb_host_interface * interface)1431 usbtouch_get_input_endpoint(struct usb_host_interface *interface)
1432 {
1433 int i;
1434
1435 for (i = 0; i < interface->desc.bNumEndpoints; i++)
1436 if (usb_endpoint_dir_in(&interface->endpoint[i].desc))
1437 return &interface->endpoint[i].desc;
1438
1439 return NULL;
1440 }
1441
usbtouch_probe(struct usb_interface * intf,const struct usb_device_id * id)1442 static int usbtouch_probe(struct usb_interface *intf,
1443 const struct usb_device_id *id)
1444 {
1445 struct usbtouch_usb *usbtouch;
1446 struct input_dev *input_dev;
1447 struct usb_endpoint_descriptor *endpoint;
1448 struct usb_device *udev = interface_to_usbdev(intf);
1449 const struct usbtouch_device_info *type;
1450 int err = -ENOMEM;
1451
1452 /* some devices are ignored */
1453 type = (const struct usbtouch_device_info *)id->driver_info;
1454 if (!type)
1455 return -ENODEV;
1456
1457 endpoint = usbtouch_get_input_endpoint(intf->cur_altsetting);
1458 if (!endpoint)
1459 return -ENXIO;
1460
1461 usbtouch = kzalloc(sizeof(*usbtouch), GFP_KERNEL);
1462 input_dev = input_allocate_device();
1463 if (!usbtouch || !input_dev)
1464 goto out_free;
1465
1466 mutex_init(&usbtouch->pm_mutex);
1467 usbtouch->type = type;
1468
1469 usbtouch->data_size = type->rept_size;
1470 if (type->get_pkt_len) {
1471 /*
1472 * When dealing with variable-length packets we should
1473 * not request more than wMaxPacketSize bytes at once
1474 * as we do not know if there is more data coming or
1475 * we filled exactly wMaxPacketSize bytes and there is
1476 * nothing else.
1477 */
1478 usbtouch->data_size = min(usbtouch->data_size,
1479 usb_endpoint_maxp(endpoint));
1480 }
1481
1482 usbtouch->data = usb_alloc_coherent(udev, usbtouch->data_size,
1483 GFP_KERNEL, &usbtouch->data_dma);
1484 if (!usbtouch->data)
1485 goto out_free;
1486
1487 if (type->get_pkt_len) {
1488 usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL);
1489 if (!usbtouch->buffer)
1490 goto out_free_buffers;
1491 usbtouch->process_pkt = usbtouch_process_multi;
1492 } else {
1493 usbtouch->process_pkt = usbtouch_process_pkt;
1494 }
1495
1496 usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
1497 if (!usbtouch->irq) {
1498 dev_dbg(&intf->dev,
1499 "%s - usb_alloc_urb failed: usbtouch->irq\n", __func__);
1500 goto out_free_buffers;
1501 }
1502
1503 usbtouch->interface = intf;
1504 usbtouch->input = input_dev;
1505
1506 if (udev->manufacturer)
1507 strscpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name));
1508
1509 if (udev->product) {
1510 if (udev->manufacturer)
1511 strlcat(usbtouch->name, " ", sizeof(usbtouch->name));
1512 strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name));
1513 }
1514
1515 if (!strlen(usbtouch->name))
1516 snprintf(usbtouch->name, sizeof(usbtouch->name),
1517 "USB Touchscreen %04x:%04x",
1518 le16_to_cpu(udev->descriptor.idVendor),
1519 le16_to_cpu(udev->descriptor.idProduct));
1520
1521 usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys));
1522 strlcat(usbtouch->phys, "/input0", sizeof(usbtouch->phys));
1523
1524 input_dev->name = usbtouch->name;
1525 input_dev->phys = usbtouch->phys;
1526 usb_to_input_id(udev, &input_dev->id);
1527 input_dev->dev.parent = &intf->dev;
1528
1529 input_set_drvdata(input_dev, usbtouch);
1530
1531 input_dev->open = usbtouch_open;
1532 input_dev->close = usbtouch_close;
1533
1534 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
1535 input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
1536 input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0);
1537 input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0);
1538 if (type->max_press)
1539 input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press,
1540 type->max_press, 0, 0);
1541
1542 if (usb_endpoint_type(endpoint) == USB_ENDPOINT_XFER_INT)
1543 usb_fill_int_urb(usbtouch->irq, udev,
1544 usb_rcvintpipe(udev, endpoint->bEndpointAddress),
1545 usbtouch->data, usbtouch->data_size,
1546 usbtouch_irq, usbtouch, endpoint->bInterval);
1547 else
1548 usb_fill_bulk_urb(usbtouch->irq, udev,
1549 usb_rcvbulkpipe(udev, endpoint->bEndpointAddress),
1550 usbtouch->data, usbtouch->data_size,
1551 usbtouch_irq, usbtouch);
1552
1553 usbtouch->irq->dev = udev;
1554 usbtouch->irq->transfer_dma = usbtouch->data_dma;
1555 usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1556
1557 /* device specific allocations */
1558 if (type->alloc) {
1559 err = type->alloc(usbtouch);
1560 if (err) {
1561 dev_dbg(&intf->dev,
1562 "%s - type->alloc() failed, err: %d\n",
1563 __func__, err);
1564 goto out_free_urb;
1565 }
1566 }
1567
1568 /* device specific initialisation*/
1569 if (type->init) {
1570 err = type->init(usbtouch);
1571 if (err) {
1572 dev_dbg(&intf->dev,
1573 "%s - type->init() failed, err: %d\n",
1574 __func__, err);
1575 goto out_do_exit;
1576 }
1577 }
1578
1579 err = input_register_device(usbtouch->input);
1580 if (err) {
1581 dev_dbg(&intf->dev,
1582 "%s - input_register_device failed, err: %d\n",
1583 __func__, err);
1584 goto out_do_exit;
1585 }
1586
1587 usb_set_intfdata(intf, usbtouch);
1588
1589 if (usbtouch->type->irq_always) {
1590 /* this can't fail */
1591 usb_autopm_get_interface(intf);
1592 err = usb_submit_urb(usbtouch->irq, GFP_KERNEL);
1593 if (err) {
1594 usb_autopm_put_interface(intf);
1595 dev_err(&intf->dev,
1596 "%s - usb_submit_urb failed with result: %d\n",
1597 __func__, err);
1598 goto out_unregister_input;
1599 }
1600 }
1601
1602 return 0;
1603
1604 out_unregister_input:
1605 input_unregister_device(input_dev);
1606 input_dev = NULL;
1607 out_do_exit:
1608 if (type->exit)
1609 type->exit(usbtouch);
1610 out_free_urb:
1611 usb_free_urb(usbtouch->irq);
1612 out_free_buffers:
1613 usbtouch_free_buffers(udev, usbtouch);
1614 out_free:
1615 input_free_device(input_dev);
1616 kfree(usbtouch);
1617 return err;
1618 }
1619
usbtouch_disconnect(struct usb_interface * intf)1620 static void usbtouch_disconnect(struct usb_interface *intf)
1621 {
1622 struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
1623
1624 if (!usbtouch)
1625 return;
1626
1627 dev_dbg(&intf->dev,
1628 "%s - usbtouch is initialized, cleaning up\n", __func__);
1629
1630 usb_set_intfdata(intf, NULL);
1631 /* this will stop IO via close */
1632 input_unregister_device(usbtouch->input);
1633 usb_free_urb(usbtouch->irq);
1634 if (usbtouch->type->exit)
1635 usbtouch->type->exit(usbtouch);
1636 usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch);
1637 kfree(usbtouch);
1638 }
1639
1640 static const struct attribute_group *usbtouch_groups[] = {
1641 #ifdef CONFIG_TOUCHSCREEN_USB_3M
1642 &mtouch_attr_group,
1643 #endif
1644 NULL
1645 };
1646
1647 static const struct usb_device_id usbtouch_devices[] = {
1648 #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
1649 /* ignore the HID capable devices, handled by usbhid */
1650 { USB_DEVICE_INTERFACE_CLASS(0x0eef, 0x0001, USB_INTERFACE_CLASS_HID),
1651 .driver_info = 0 },
1652 { USB_DEVICE_INTERFACE_CLASS(0x0eef, 0x0002, USB_INTERFACE_CLASS_HID),
1653 .driver_info = 0 },
1654
1655 /* normal device IDs */
1656 { USB_DEVICE(0x3823, 0x0001),
1657 .driver_info = (kernel_ulong_t)&egalax_dev_info },
1658 { USB_DEVICE(0x3823, 0x0002),
1659 .driver_info = (kernel_ulong_t)&egalax_dev_info },
1660 { USB_DEVICE(0x0123, 0x0001),
1661 .driver_info = (kernel_ulong_t)&egalax_dev_info },
1662 { USB_DEVICE(0x0eef, 0x0001),
1663 .driver_info = (kernel_ulong_t)&egalax_dev_info },
1664 { USB_DEVICE(0x0eef, 0x0002),
1665 .driver_info = (kernel_ulong_t)&egalax_dev_info },
1666 { USB_DEVICE(0x1234, 0x0001),
1667 .driver_info = (kernel_ulong_t)&egalax_dev_info },
1668 { USB_DEVICE(0x1234, 0x0002),
1669 .driver_info = (kernel_ulong_t)&egalax_dev_info },
1670 #endif
1671
1672 #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
1673 { USB_DEVICE(0x134c, 0x0001),
1674 .driver_info = (kernel_ulong_t)&panjit_dev_info },
1675 { USB_DEVICE(0x134c, 0x0002),
1676 .driver_info = (kernel_ulong_t)&panjit_dev_info },
1677 { USB_DEVICE(0x134c, 0x0003),
1678 .driver_info = (kernel_ulong_t)&panjit_dev_info },
1679 { USB_DEVICE(0x134c, 0x0004),
1680 .driver_info = (kernel_ulong_t)&panjit_dev_info },
1681 #endif
1682
1683 #ifdef CONFIG_TOUCHSCREEN_USB_3M
1684 { USB_DEVICE(0x0596, 0x0001),
1685 .driver_info = (kernel_ulong_t)&mtouch_dev_info },
1686 #endif
1687
1688 #ifdef CONFIG_TOUCHSCREEN_USB_ITM
1689 { USB_DEVICE(0x0403, 0xf9e9),
1690 .driver_info = (kernel_ulong_t)&itm_dev_info },
1691 { USB_DEVICE(0x16e3, 0xf9e9),
1692 .driver_info = (kernel_ulong_t)&itm_dev_info },
1693 #endif
1694
1695 #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
1696 { USB_DEVICE(0x1234, 0x5678),
1697 .driver_info = (kernel_ulong_t)&eturbo_dev_info },
1698 #endif
1699
1700 #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
1701 { USB_DEVICE(0x0637, 0x0001),
1702 .driver_info = (kernel_ulong_t)&gunze_dev_info },
1703 #endif
1704
1705 #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
1706 { USB_DEVICE(0x0afa, 0x03e8),
1707 .driver_info = (kernel_ulong_t)&dmc_tsc10_dev_info },
1708 #endif
1709
1710 #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
1711 { USB_DEVICE(0x255e, 0x0001),
1712 .driver_info = (kernel_ulong_t)&irtouch_dev_info },
1713 { USB_DEVICE(0x595a, 0x0001),
1714 .driver_info = (kernel_ulong_t)&irtouch_dev_info },
1715 { USB_DEVICE(0x6615, 0x0001),
1716 .driver_info = (kernel_ulong_t)&irtouch_dev_info },
1717 { USB_DEVICE(0x6615, 0x0012),
1718 .driver_info = (kernel_ulong_t)&irtouch_hires_dev_info },
1719 #endif
1720
1721 #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
1722 { USB_DEVICE(0x1391, 0x1000),
1723 .driver_info = (kernel_ulong_t)&idealtek_dev_info },
1724 #endif
1725
1726 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
1727 { USB_DEVICE(0x0dfc, 0x0001),
1728 .driver_info = (kernel_ulong_t)&general_touch_dev_info },
1729 #endif
1730
1731 #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
1732 { USB_DEVICE(0x08f2, 0x007f),
1733 .driver_info = (kernel_ulong_t)&gotop_dev_info },
1734 { USB_DEVICE(0x08f2, 0x00ce),
1735 .driver_info = (kernel_ulong_t)&gotop_dev_info },
1736 { USB_DEVICE(0x08f2, 0x00f4),
1737 .driver_info = (kernel_ulong_t)&gotop_dev_info },
1738 #endif
1739
1740 #ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
1741 { USB_DEVICE(0x0f92, 0x0001),
1742 .driver_info = (kernel_ulong_t)&jastec_dev_info },
1743 #endif
1744
1745 #ifdef CONFIG_TOUCHSCREEN_USB_E2I
1746 { USB_DEVICE(0x1ac7, 0x0001),
1747 .driver_info = (kernel_ulong_t)&e2i_dev_info },
1748 #endif
1749
1750 #ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
1751 { USB_DEVICE(0x14c8, 0x0003),
1752 .driver_info = (kernel_ulong_t)&zytronic_dev_info },
1753 #endif
1754
1755 #ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
1756 /* TC5UH */
1757 { USB_DEVICE(0x0664, 0x0309),
1758 .driver_info = (kernel_ulong_t)&tc45usb_dev_info },
1759 /* TC4UM */
1760 { USB_DEVICE(0x0664, 0x0306),
1761 .driver_info = (kernel_ulong_t)&tc45usb_dev_info },
1762 #endif
1763
1764 #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
1765 /* data interface only */
1766 { USB_DEVICE_AND_INTERFACE_INFO(0x10f0, 0x2002, 0x0a, 0x00, 0x00),
1767 .driver_info = (kernel_ulong_t)&nexio_dev_info },
1768 { USB_DEVICE_AND_INTERFACE_INFO(0x1870, 0x0001, 0x0a, 0x00, 0x00),
1769 .driver_info = (kernel_ulong_t)&nexio_dev_info },
1770 #endif
1771
1772 #ifdef CONFIG_TOUCHSCREEN_USB_ELO
1773 { USB_DEVICE(0x04e7, 0x0020),
1774 .driver_info = (kernel_ulong_t)&elo_dev_info },
1775 #endif
1776
1777 #ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
1778 { USB_DEVICE(0x7374, 0x0001),
1779 .driver_info = (kernel_ulong_t)&etouch_dev_info },
1780 #endif
1781
1782 { }
1783 };
1784 MODULE_DEVICE_TABLE(usb, usbtouch_devices);
1785
1786 static struct usb_driver usbtouch_driver = {
1787 .name = "usbtouchscreen",
1788 .probe = usbtouch_probe,
1789 .disconnect = usbtouch_disconnect,
1790 .suspend = usbtouch_suspend,
1791 .resume = usbtouch_resume,
1792 .reset_resume = usbtouch_reset_resume,
1793 .id_table = usbtouch_devices,
1794 .dev_groups = usbtouch_groups,
1795 .supports_autosuspend = 1,
1796 };
1797
1798 module_usb_driver(usbtouch_driver);
1799
1800 MODULE_AUTHOR("Daniel Ritz <daniel.ritz@gmx.ch>");
1801 MODULE_DESCRIPTION("USB Touchscreen Driver");
1802 MODULE_LICENSE("GPL");
1803
1804 MODULE_ALIAS("touchkitusb");
1805 MODULE_ALIAS("itmtouch");
1806 MODULE_ALIAS("mtouchusb");
1807