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Commit | Line | Data |
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94011f93 | 1 | /* |
57fd637a | 2 | * HID driver for N-Trig touchscreens |
94011f93 | 3 | * |
6549981b SC |
4 | * Copyright (c) 2008-2010 Rafi Rubin |
5 | * Copyright (c) 2009-2010 Stephane Chatty | |
94011f93 RR |
6 | * |
7 | */ | |
8 | ||
9 | /* | |
10 | * This program is free software; you can redistribute it and/or modify it | |
11 | * under the terms of the GNU General Public License as published by the Free | |
12 | * Software Foundation; either version 2 of the License, or (at your option) | |
13 | * any later version. | |
14 | */ | |
15 | ||
16 | #include <linux/device.h> | |
17 | #include <linux/hid.h> | |
6549981b SC |
18 | #include <linux/usb.h> |
19 | #include "usbhid/usbhid.h" | |
94011f93 | 20 | #include <linux/module.h> |
5a0e3ad6 | 21 | #include <linux/slab.h> |
94011f93 RR |
22 | |
23 | #include "hid-ids.h" | |
24 | ||
25 | #define NTRIG_DUPLICATE_USAGES 0x001 | |
26 | ||
369db2a6 | 27 | static unsigned int min_width; |
ab3f4980 RR |
28 | module_param(min_width, uint, 0644); |
29 | MODULE_PARM_DESC(min_width, "Minimum touch contact width to accept."); | |
30 | ||
369db2a6 | 31 | static unsigned int min_height; |
ab3f4980 RR |
32 | module_param(min_height, uint, 0644); |
33 | MODULE_PARM_DESC(min_height, "Minimum touch contact height to accept."); | |
34 | ||
369db2a6 | 35 | static unsigned int activate_slack = 1; |
ab3f4980 RR |
36 | module_param(activate_slack, uint, 0644); |
37 | MODULE_PARM_DESC(activate_slack, "Number of touch frames to ignore at " | |
38 | "the start of touch input."); | |
39 | ||
369db2a6 | 40 | static unsigned int deactivate_slack = 4; |
ab3f4980 RR |
41 | module_param(deactivate_slack, uint, 0644); |
42 | MODULE_PARM_DESC(deactivate_slack, "Number of empty frames to ignore before " | |
43 | "deactivating touch."); | |
44 | ||
369db2a6 | 45 | static unsigned int activation_width = 64; |
ab3f4980 RR |
46 | module_param(activation_width, uint, 0644); |
47 | MODULE_PARM_DESC(activation_width, "Width threshold to immediately start " | |
48 | "processing touch events."); | |
49 | ||
369db2a6 | 50 | static unsigned int activation_height = 32; |
ab3f4980 RR |
51 | module_param(activation_height, uint, 0644); |
52 | MODULE_PARM_DESC(activation_height, "Height threshold to immediately start " | |
53 | "processing touch events."); | |
369db2a6 | 54 | |
57fd637a | 55 | struct ntrig_data { |
dbf2b17d RR |
56 | /* Incoming raw values for a single contact */ |
57 | __u16 x, y, w, h; | |
58 | __u16 id; | |
250d3775 RR |
59 | |
60 | bool tipswitch; | |
61 | bool confidence; | |
62 | bool first_contact_touch; | |
dbf2b17d RR |
63 | |
64 | bool reading_mt; | |
dbf2b17d RR |
65 | |
66 | __u8 mt_footer[4]; | |
67 | __u8 mt_foot_count; | |
369db2a6 RR |
68 | |
69 | /* The current activation state. */ | |
70 | __s8 act_state; | |
71 | ||
72 | /* Empty frames to ignore before recognizing the end of activity */ | |
73 | __s8 deactivate_slack; | |
74 | ||
75 | /* Frames to ignore before acknowledging the start of activity */ | |
76 | __s8 activate_slack; | |
77 | ||
78 | /* Minimum size contact to accept */ | |
79 | __u16 min_width; | |
80 | __u16 min_height; | |
81 | ||
82 | /* Threshold to override activation slack */ | |
83 | __u16 activation_width; | |
84 | __u16 activation_height; | |
85 | ||
86 | __u16 sensor_logical_width; | |
87 | __u16 sensor_logical_height; | |
88 | __u16 sensor_physical_width; | |
89 | __u16 sensor_physical_height; | |
57fd637a SC |
90 | }; |
91 | ||
eab32f5f | 92 | |
0277873c RR |
93 | /* |
94 | * This function converts the 4 byte raw firmware code into | |
95 | * a string containing 5 comma separated numbers. | |
96 | */ | |
97 | static int ntrig_version_string(unsigned char *raw, char *buf) | |
98 | { | |
99 | __u8 a = (raw[1] & 0x0e) >> 1; | |
100 | __u8 b = (raw[0] & 0x3c) >> 2; | |
101 | __u8 c = ((raw[0] & 0x03) << 3) | ((raw[3] & 0xe0) >> 5); | |
102 | __u8 d = ((raw[3] & 0x07) << 3) | ((raw[2] & 0xe0) >> 5); | |
103 | __u8 e = raw[2] & 0x07; | |
104 | ||
105 | /* | |
106 | * As yet unmapped bits: | |
107 | * 0b11000000 0b11110001 0b00011000 0b00011000 | |
108 | */ | |
109 | ||
110 | return sprintf(buf, "%u.%u.%u.%u.%u", a, b, c, d, e); | |
111 | } | |
112 | ||
113 | static void ntrig_report_version(struct hid_device *hdev) | |
114 | { | |
115 | int ret; | |
116 | char buf[20]; | |
117 | struct usb_device *usb_dev = hid_to_usb_dev(hdev); | |
118 | unsigned char *data = kmalloc(8, GFP_KERNEL); | |
119 | ||
120 | if (!data) | |
121 | goto err_free; | |
122 | ||
123 | ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0), | |
124 | USB_REQ_CLEAR_FEATURE, | |
125 | USB_TYPE_CLASS | USB_RECIP_INTERFACE | | |
126 | USB_DIR_IN, | |
127 | 0x30c, 1, data, 8, | |
128 | USB_CTRL_SET_TIMEOUT); | |
129 | ||
130 | if (ret == 8) { | |
131 | ret = ntrig_version_string(&data[2], buf); | |
132 | ||
133 | dev_info(&hdev->dev, | |
134 | "Firmware version: %s (%02x%02x %02x%02x)\n", | |
135 | buf, data[2], data[3], data[4], data[5]); | |
136 | } | |
137 | ||
138 | err_free: | |
139 | kfree(data); | |
140 | } | |
141 | ||
eab32f5f RR |
142 | static ssize_t show_phys_width(struct device *dev, |
143 | struct device_attribute *attr, | |
144 | char *buf) | |
145 | { | |
146 | struct hid_device *hdev = container_of(dev, struct hid_device, dev); | |
147 | struct ntrig_data *nd = hid_get_drvdata(hdev); | |
148 | ||
149 | return sprintf(buf, "%d\n", nd->sensor_physical_width); | |
150 | } | |
151 | ||
152 | static DEVICE_ATTR(sensor_physical_width, S_IRUGO, show_phys_width, NULL); | |
153 | ||
154 | static ssize_t show_phys_height(struct device *dev, | |
155 | struct device_attribute *attr, | |
156 | char *buf) | |
157 | { | |
158 | struct hid_device *hdev = container_of(dev, struct hid_device, dev); | |
159 | struct ntrig_data *nd = hid_get_drvdata(hdev); | |
160 | ||
161 | return sprintf(buf, "%d\n", nd->sensor_physical_height); | |
162 | } | |
163 | ||
164 | static DEVICE_ATTR(sensor_physical_height, S_IRUGO, show_phys_height, NULL); | |
165 | ||
166 | static ssize_t show_log_width(struct device *dev, | |
167 | struct device_attribute *attr, | |
168 | char *buf) | |
169 | { | |
170 | struct hid_device *hdev = container_of(dev, struct hid_device, dev); | |
171 | struct ntrig_data *nd = hid_get_drvdata(hdev); | |
172 | ||
173 | return sprintf(buf, "%d\n", nd->sensor_logical_width); | |
174 | } | |
175 | ||
176 | static DEVICE_ATTR(sensor_logical_width, S_IRUGO, show_log_width, NULL); | |
177 | ||
178 | static ssize_t show_log_height(struct device *dev, | |
179 | struct device_attribute *attr, | |
180 | char *buf) | |
181 | { | |
182 | struct hid_device *hdev = container_of(dev, struct hid_device, dev); | |
183 | struct ntrig_data *nd = hid_get_drvdata(hdev); | |
184 | ||
185 | return sprintf(buf, "%d\n", nd->sensor_logical_height); | |
186 | } | |
187 | ||
188 | static DEVICE_ATTR(sensor_logical_height, S_IRUGO, show_log_height, NULL); | |
189 | ||
190 | static ssize_t show_min_width(struct device *dev, | |
191 | struct device_attribute *attr, | |
192 | char *buf) | |
193 | { | |
194 | struct hid_device *hdev = container_of(dev, struct hid_device, dev); | |
195 | struct ntrig_data *nd = hid_get_drvdata(hdev); | |
196 | ||
197 | return sprintf(buf, "%d\n", nd->min_width * | |
198 | nd->sensor_physical_width / | |
199 | nd->sensor_logical_width); | |
200 | } | |
201 | ||
202 | static ssize_t set_min_width(struct device *dev, | |
203 | struct device_attribute *attr, | |
204 | const char *buf, size_t count) | |
205 | { | |
206 | struct hid_device *hdev = container_of(dev, struct hid_device, dev); | |
207 | struct ntrig_data *nd = hid_get_drvdata(hdev); | |
208 | ||
209 | unsigned long val; | |
210 | ||
211 | if (strict_strtoul(buf, 0, &val)) | |
212 | return -EINVAL; | |
213 | ||
214 | if (val > nd->sensor_physical_width) | |
215 | return -EINVAL; | |
216 | ||
217 | nd->min_width = val * nd->sensor_logical_width / | |
218 | nd->sensor_physical_width; | |
219 | ||
220 | return count; | |
221 | } | |
222 | ||
223 | static DEVICE_ATTR(min_width, S_IWUSR | S_IRUGO, show_min_width, set_min_width); | |
224 | ||
225 | static ssize_t show_min_height(struct device *dev, | |
226 | struct device_attribute *attr, | |
227 | char *buf) | |
228 | { | |
229 | struct hid_device *hdev = container_of(dev, struct hid_device, dev); | |
230 | struct ntrig_data *nd = hid_get_drvdata(hdev); | |
231 | ||
232 | return sprintf(buf, "%d\n", nd->min_height * | |
233 | nd->sensor_physical_height / | |
234 | nd->sensor_logical_height); | |
235 | } | |
236 | ||
237 | static ssize_t set_min_height(struct device *dev, | |
238 | struct device_attribute *attr, | |
239 | const char *buf, size_t count) | |
240 | { | |
241 | struct hid_device *hdev = container_of(dev, struct hid_device, dev); | |
242 | struct ntrig_data *nd = hid_get_drvdata(hdev); | |
243 | ||
244 | unsigned long val; | |
245 | ||
246 | if (strict_strtoul(buf, 0, &val)) | |
247 | return -EINVAL; | |
248 | ||
249 | if (val > nd->sensor_physical_height) | |
250 | return -EINVAL; | |
251 | ||
252 | nd->min_height = val * nd->sensor_logical_height / | |
253 | nd->sensor_physical_height; | |
254 | ||
255 | return count; | |
256 | } | |
257 | ||
258 | static DEVICE_ATTR(min_height, S_IWUSR | S_IRUGO, show_min_height, | |
259 | set_min_height); | |
260 | ||
261 | static ssize_t show_activate_slack(struct device *dev, | |
262 | struct device_attribute *attr, | |
263 | char *buf) | |
264 | { | |
265 | struct hid_device *hdev = container_of(dev, struct hid_device, dev); | |
266 | struct ntrig_data *nd = hid_get_drvdata(hdev); | |
267 | ||
268 | return sprintf(buf, "%d\n", nd->activate_slack); | |
269 | } | |
270 | ||
271 | static ssize_t set_activate_slack(struct device *dev, | |
272 | struct device_attribute *attr, | |
273 | const char *buf, size_t count) | |
274 | { | |
275 | struct hid_device *hdev = container_of(dev, struct hid_device, dev); | |
276 | struct ntrig_data *nd = hid_get_drvdata(hdev); | |
277 | ||
278 | unsigned long val; | |
279 | ||
280 | if (strict_strtoul(buf, 0, &val)) | |
281 | return -EINVAL; | |
282 | ||
283 | if (val > 0x7f) | |
284 | return -EINVAL; | |
285 | ||
286 | nd->activate_slack = val; | |
287 | ||
288 | return count; | |
289 | } | |
290 | ||
291 | static DEVICE_ATTR(activate_slack, S_IWUSR | S_IRUGO, show_activate_slack, | |
292 | set_activate_slack); | |
293 | ||
294 | static ssize_t show_activation_width(struct device *dev, | |
295 | struct device_attribute *attr, | |
296 | char *buf) | |
297 | { | |
298 | struct hid_device *hdev = container_of(dev, struct hid_device, dev); | |
299 | struct ntrig_data *nd = hid_get_drvdata(hdev); | |
300 | ||
301 | return sprintf(buf, "%d\n", nd->activation_width * | |
302 | nd->sensor_physical_width / | |
303 | nd->sensor_logical_width); | |
304 | } | |
305 | ||
306 | static ssize_t set_activation_width(struct device *dev, | |
307 | struct device_attribute *attr, | |
308 | const char *buf, size_t count) | |
309 | { | |
310 | struct hid_device *hdev = container_of(dev, struct hid_device, dev); | |
311 | struct ntrig_data *nd = hid_get_drvdata(hdev); | |
312 | ||
313 | unsigned long val; | |
314 | ||
315 | if (strict_strtoul(buf, 0, &val)) | |
316 | return -EINVAL; | |
317 | ||
318 | if (val > nd->sensor_physical_width) | |
319 | return -EINVAL; | |
320 | ||
321 | nd->activation_width = val * nd->sensor_logical_width / | |
322 | nd->sensor_physical_width; | |
323 | ||
324 | return count; | |
325 | } | |
326 | ||
327 | static DEVICE_ATTR(activation_width, S_IWUSR | S_IRUGO, show_activation_width, | |
328 | set_activation_width); | |
329 | ||
330 | static ssize_t show_activation_height(struct device *dev, | |
331 | struct device_attribute *attr, | |
332 | char *buf) | |
333 | { | |
334 | struct hid_device *hdev = container_of(dev, struct hid_device, dev); | |
335 | struct ntrig_data *nd = hid_get_drvdata(hdev); | |
336 | ||
337 | return sprintf(buf, "%d\n", nd->activation_height * | |
338 | nd->sensor_physical_height / | |
339 | nd->sensor_logical_height); | |
340 | } | |
341 | ||
342 | static ssize_t set_activation_height(struct device *dev, | |
343 | struct device_attribute *attr, | |
344 | const char *buf, size_t count) | |
345 | { | |
346 | struct hid_device *hdev = container_of(dev, struct hid_device, dev); | |
347 | struct ntrig_data *nd = hid_get_drvdata(hdev); | |
348 | ||
349 | unsigned long val; | |
350 | ||
351 | if (strict_strtoul(buf, 0, &val)) | |
352 | return -EINVAL; | |
353 | ||
354 | if (val > nd->sensor_physical_height) | |
355 | return -EINVAL; | |
356 | ||
357 | nd->activation_height = val * nd->sensor_logical_height / | |
358 | nd->sensor_physical_height; | |
359 | ||
360 | return count; | |
361 | } | |
362 | ||
363 | static DEVICE_ATTR(activation_height, S_IWUSR | S_IRUGO, | |
364 | show_activation_height, set_activation_height); | |
365 | ||
366 | static ssize_t show_deactivate_slack(struct device *dev, | |
367 | struct device_attribute *attr, | |
368 | char *buf) | |
369 | { | |
370 | struct hid_device *hdev = container_of(dev, struct hid_device, dev); | |
371 | struct ntrig_data *nd = hid_get_drvdata(hdev); | |
372 | ||
373 | return sprintf(buf, "%d\n", -nd->deactivate_slack); | |
374 | } | |
375 | ||
376 | static ssize_t set_deactivate_slack(struct device *dev, | |
377 | struct device_attribute *attr, | |
378 | const char *buf, size_t count) | |
379 | { | |
380 | struct hid_device *hdev = container_of(dev, struct hid_device, dev); | |
381 | struct ntrig_data *nd = hid_get_drvdata(hdev); | |
382 | ||
383 | unsigned long val; | |
384 | ||
385 | if (strict_strtoul(buf, 0, &val)) | |
386 | return -EINVAL; | |
387 | ||
388 | /* | |
389 | * No more than 8 terminal frames have been observed so far | |
390 | * and higher slack is highly likely to leave the single | |
391 | * touch emulation stuck down. | |
392 | */ | |
393 | if (val > 7) | |
394 | return -EINVAL; | |
395 | ||
396 | nd->deactivate_slack = -val; | |
397 | ||
398 | return count; | |
399 | } | |
400 | ||
401 | static DEVICE_ATTR(deactivate_slack, S_IWUSR | S_IRUGO, show_deactivate_slack, | |
402 | set_deactivate_slack); | |
403 | ||
404 | static struct attribute *sysfs_attrs[] = { | |
405 | &dev_attr_sensor_physical_width.attr, | |
406 | &dev_attr_sensor_physical_height.attr, | |
407 | &dev_attr_sensor_logical_width.attr, | |
408 | &dev_attr_sensor_logical_height.attr, | |
409 | &dev_attr_min_height.attr, | |
410 | &dev_attr_min_width.attr, | |
411 | &dev_attr_activate_slack.attr, | |
412 | &dev_attr_activation_width.attr, | |
413 | &dev_attr_activation_height.attr, | |
414 | &dev_attr_deactivate_slack.attr, | |
415 | NULL | |
416 | }; | |
417 | ||
418 | static struct attribute_group ntrig_attribute_group = { | |
419 | .attrs = sysfs_attrs | |
420 | }; | |
421 | ||
57fd637a SC |
422 | /* |
423 | * this driver is aimed at two firmware versions in circulation: | |
424 | * - dual pen/finger single touch | |
425 | * - finger multitouch, pen not working | |
426 | */ | |
427 | ||
94011f93 | 428 | static int ntrig_input_mapping(struct hid_device *hdev, struct hid_input *hi, |
a52dc34c RR |
429 | struct hid_field *field, struct hid_usage *usage, |
430 | unsigned long **bit, int *max) | |
94011f93 | 431 | { |
369db2a6 RR |
432 | struct ntrig_data *nd = hid_get_drvdata(hdev); |
433 | ||
dbf2b17d RR |
434 | /* No special mappings needed for the pen and single touch */ |
435 | if (field->physical) | |
943ed464 RR |
436 | return 0; |
437 | ||
57fd637a | 438 | switch (usage->hid & HID_USAGE_PAGE) { |
57fd637a SC |
439 | case HID_UP_GENDESK: |
440 | switch (usage->hid) { | |
441 | case HID_GD_X: | |
442 | hid_map_usage(hi, usage, bit, max, | |
443 | EV_ABS, ABS_MT_POSITION_X); | |
444 | input_set_abs_params(hi->input, ABS_X, | |
445 | field->logical_minimum, | |
446 | field->logical_maximum, 0, 0); | |
369db2a6 RR |
447 | |
448 | if (!nd->sensor_logical_width) { | |
449 | nd->sensor_logical_width = | |
450 | field->logical_maximum - | |
451 | field->logical_minimum; | |
452 | nd->sensor_physical_width = | |
453 | field->physical_maximum - | |
454 | field->physical_minimum; | |
455 | nd->activation_width = activation_width * | |
456 | nd->sensor_logical_width / | |
457 | nd->sensor_physical_width; | |
458 | nd->min_width = min_width * | |
459 | nd->sensor_logical_width / | |
460 | nd->sensor_physical_width; | |
461 | } | |
57fd637a SC |
462 | return 1; |
463 | case HID_GD_Y: | |
464 | hid_map_usage(hi, usage, bit, max, | |
465 | EV_ABS, ABS_MT_POSITION_Y); | |
466 | input_set_abs_params(hi->input, ABS_Y, | |
467 | field->logical_minimum, | |
468 | field->logical_maximum, 0, 0); | |
369db2a6 RR |
469 | |
470 | if (!nd->sensor_logical_height) { | |
471 | nd->sensor_logical_height = | |
472 | field->logical_maximum - | |
473 | field->logical_minimum; | |
474 | nd->sensor_physical_height = | |
475 | field->physical_maximum - | |
476 | field->physical_minimum; | |
477 | nd->activation_height = activation_height * | |
478 | nd->sensor_logical_height / | |
479 | nd->sensor_physical_height; | |
480 | nd->min_height = min_height * | |
481 | nd->sensor_logical_height / | |
482 | nd->sensor_physical_height; | |
483 | } | |
57fd637a SC |
484 | return 1; |
485 | } | |
486 | return 0; | |
487 | ||
488 | case HID_UP_DIGITIZER: | |
489 | switch (usage->hid) { | |
490 | /* we do not want to map these for now */ | |
dbf2b17d | 491 | case HID_DG_CONTACTID: /* Not trustworthy, squelch for now */ |
57fd637a SC |
492 | case HID_DG_INPUTMODE: |
493 | case HID_DG_DEVICEINDEX: | |
57fd637a SC |
494 | case HID_DG_CONTACTMAX: |
495 | return -1; | |
496 | ||
57fd637a SC |
497 | /* width/height mapped on TouchMajor/TouchMinor/Orientation */ |
498 | case HID_DG_WIDTH: | |
499 | hid_map_usage(hi, usage, bit, max, | |
a52dc34c | 500 | EV_ABS, ABS_MT_TOUCH_MAJOR); |
57fd637a SC |
501 | return 1; |
502 | case HID_DG_HEIGHT: | |
503 | hid_map_usage(hi, usage, bit, max, | |
a52dc34c | 504 | EV_ABS, ABS_MT_TOUCH_MINOR); |
57fd637a | 505 | input_set_abs_params(hi->input, ABS_MT_ORIENTATION, |
a52dc34c | 506 | 0, 1, 0, 0); |
57fd637a SC |
507 | return 1; |
508 | } | |
509 | return 0; | |
510 | ||
511 | case 0xff000000: | |
512 | /* we do not want to map these: no input-oriented meaning */ | |
513 | return -1; | |
94011f93 | 514 | } |
57fd637a | 515 | |
94011f93 RR |
516 | return 0; |
517 | } | |
518 | ||
519 | static int ntrig_input_mapped(struct hid_device *hdev, struct hid_input *hi, | |
a52dc34c RR |
520 | struct hid_field *field, struct hid_usage *usage, |
521 | unsigned long **bit, int *max) | |
94011f93 | 522 | { |
dbf2b17d RR |
523 | /* No special mappings needed for the pen and single touch */ |
524 | if (field->physical) | |
943ed464 | 525 | return 0; |
b0549cf1 | 526 | |
94011f93 RR |
527 | if (usage->type == EV_KEY || usage->type == EV_REL |
528 | || usage->type == EV_ABS) | |
529 | clear_bit(usage->code, *bit); | |
530 | ||
531 | return 0; | |
532 | } | |
57fd637a SC |
533 | |
534 | /* | |
535 | * this function is called upon all reports | |
536 | * so that we can filter contact point information, | |
537 | * decide whether we are in multi or single touch mode | |
538 | * and call input_mt_sync after each point if necessary | |
539 | */ | |
540 | static int ntrig_event (struct hid_device *hid, struct hid_field *field, | |
a52dc34c | 541 | struct hid_usage *usage, __s32 value) |
57fd637a SC |
542 | { |
543 | struct input_dev *input = field->hidinput->input; | |
544 | struct ntrig_data *nd = hid_get_drvdata(hid); | |
545 | ||
943ed464 RR |
546 | /* No special handling needed for the pen */ |
547 | if (field->application == HID_DG_PEN) | |
548 | return 0; | |
549 | ||
57fd637a SC |
550 | if (hid->claimed & HID_CLAIMED_INPUT) { |
551 | switch (usage->hid) { | |
dbf2b17d RR |
552 | case 0xff000001: |
553 | /* Tag indicating the start of a multitouch group */ | |
554 | nd->reading_mt = 1; | |
250d3775 | 555 | nd->first_contact_touch = 0; |
dbf2b17d | 556 | break; |
2886539d | 557 | case HID_DG_TIPSWITCH: |
250d3775 | 558 | nd->tipswitch = value; |
2886539d RR |
559 | /* Prevent emission of touch until validated */ |
560 | return 1; | |
dbf2b17d RR |
561 | case HID_DG_CONFIDENCE: |
562 | nd->confidence = value; | |
563 | break; | |
57fd637a SC |
564 | case HID_GD_X: |
565 | nd->x = value; | |
dbf2b17d RR |
566 | /* Clear the contact footer */ |
567 | nd->mt_foot_count = 0; | |
57fd637a SC |
568 | break; |
569 | case HID_GD_Y: | |
570 | nd->y = value; | |
571 | break; | |
572 | case HID_DG_CONTACTID: | |
573 | nd->id = value; | |
57fd637a SC |
574 | break; |
575 | case HID_DG_WIDTH: | |
576 | nd->w = value; | |
577 | break; | |
578 | case HID_DG_HEIGHT: | |
579 | nd->h = value; | |
580 | /* | |
581 | * when in single touch mode, this is the last | |
582 | * report received in a finger event. We want | |
583 | * to emit a normal (X, Y) position | |
584 | */ | |
dbf2b17d | 585 | if (!nd->reading_mt) { |
250d3775 RR |
586 | /* |
587 | * TipSwitch indicates the presence of a | |
588 | * finger in single touch mode. | |
589 | */ | |
2170c5a8 | 590 | input_report_key(input, BTN_TOUCH, |
250d3775 RR |
591 | nd->tipswitch); |
592 | input_report_key(input, BTN_TOOL_DOUBLETAP, | |
593 | nd->tipswitch); | |
57fd637a SC |
594 | input_event(input, EV_ABS, ABS_X, nd->x); |
595 | input_event(input, EV_ABS, ABS_Y, nd->y); | |
57fd637a SC |
596 | } |
597 | break; | |
598 | case 0xff000002: | |
599 | /* | |
600 | * we receive this when the device is in multitouch | |
601 | * mode. The first of the three values tagged with | |
602 | * this usage tells if the contact point is real | |
603 | * or a placeholder | |
604 | */ | |
dbf2b17d RR |
605 | |
606 | /* Shouldn't get more than 4 footer packets, so skip */ | |
607 | if (nd->mt_foot_count >= 4) | |
608 | break; | |
609 | ||
610 | nd->mt_footer[nd->mt_foot_count++] = value; | |
611 | ||
612 | /* if the footer isn't complete break */ | |
613 | if (nd->mt_foot_count != 4) | |
614 | break; | |
615 | ||
369db2a6 | 616 | /* Pen activity signal. */ |
dbf2b17d | 617 | if (nd->mt_footer[2]) { |
369db2a6 RR |
618 | /* |
619 | * When the pen deactivates touch, we see a | |
620 | * bogus frame with ContactCount > 0. | |
621 | * We can | |
622 | * save a bit of work by ensuring act_state < 0 | |
623 | * even if deactivation slack is turned off. | |
624 | */ | |
625 | nd->act_state = deactivate_slack - 1; | |
dbf2b17d | 626 | nd->confidence = 0; |
57fd637a | 627 | break; |
dbf2b17d RR |
628 | } |
629 | ||
369db2a6 RR |
630 | /* |
631 | * The first footer value indicates the presence of a | |
632 | * finger. | |
633 | */ | |
634 | if (nd->mt_footer[0]) { | |
635 | /* | |
636 | * We do not want to process contacts under | |
637 | * the size threshold, but do not want to | |
638 | * ignore them for activation state | |
639 | */ | |
640 | if (nd->w < nd->min_width || | |
641 | nd->h < nd->min_height) | |
642 | nd->confidence = 0; | |
643 | } else | |
dbf2b17d | 644 | break; |
369db2a6 RR |
645 | |
646 | if (nd->act_state > 0) { | |
647 | /* | |
648 | * Contact meets the activation size threshold | |
649 | */ | |
650 | if (nd->w >= nd->activation_width && | |
651 | nd->h >= nd->activation_height) { | |
652 | if (nd->id) | |
653 | /* | |
654 | * first contact, activate now | |
655 | */ | |
656 | nd->act_state = 0; | |
657 | else { | |
658 | /* | |
659 | * avoid corrupting this frame | |
660 | * but ensure next frame will | |
661 | * be active | |
662 | */ | |
663 | nd->act_state = 1; | |
664 | break; | |
665 | } | |
666 | } else | |
667 | /* | |
668 | * Defer adjusting the activation state | |
669 | * until the end of the frame. | |
670 | */ | |
671 | break; | |
dbf2b17d RR |
672 | } |
673 | ||
369db2a6 RR |
674 | /* Discarding this contact */ |
675 | if (!nd->confidence) | |
676 | break; | |
677 | ||
57fd637a SC |
678 | /* emit a normal (X, Y) for the first point only */ |
679 | if (nd->id == 0) { | |
250d3775 RR |
680 | /* |
681 | * TipSwitch is superfluous in multitouch | |
682 | * mode. The footer events tell us | |
683 | * if there is a finger on the screen or | |
684 | * not. | |
685 | */ | |
686 | nd->first_contact_touch = nd->confidence; | |
57fd637a SC |
687 | input_event(input, EV_ABS, ABS_X, nd->x); |
688 | input_event(input, EV_ABS, ABS_Y, nd->y); | |
689 | } | |
369db2a6 RR |
690 | |
691 | /* Emit MT events */ | |
57fd637a SC |
692 | input_event(input, EV_ABS, ABS_MT_POSITION_X, nd->x); |
693 | input_event(input, EV_ABS, ABS_MT_POSITION_Y, nd->y); | |
369db2a6 RR |
694 | |
695 | /* | |
696 | * Translate from height and width to size | |
697 | * and orientation. | |
698 | */ | |
57fd637a SC |
699 | if (nd->w > nd->h) { |
700 | input_event(input, EV_ABS, | |
701 | ABS_MT_ORIENTATION, 1); | |
702 | input_event(input, EV_ABS, | |
703 | ABS_MT_TOUCH_MAJOR, nd->w); | |
704 | input_event(input, EV_ABS, | |
705 | ABS_MT_TOUCH_MINOR, nd->h); | |
706 | } else { | |
707 | input_event(input, EV_ABS, | |
708 | ABS_MT_ORIENTATION, 0); | |
709 | input_event(input, EV_ABS, | |
710 | ABS_MT_TOUCH_MAJOR, nd->h); | |
711 | input_event(input, EV_ABS, | |
712 | ABS_MT_TOUCH_MINOR, nd->w); | |
713 | } | |
714 | input_mt_sync(field->hidinput->input); | |
dbf2b17d RR |
715 | break; |
716 | ||
717 | case HID_DG_CONTACTCOUNT: /* End of a multitouch group */ | |
369db2a6 | 718 | if (!nd->reading_mt) /* Just to be sure */ |
dbf2b17d RR |
719 | break; |
720 | ||
721 | nd->reading_mt = 0; | |
722 | ||
369db2a6 RR |
723 | |
724 | /* | |
725 | * Activation state machine logic: | |
726 | * | |
727 | * Fundamental states: | |
728 | * state > 0: Inactive | |
729 | * state <= 0: Active | |
730 | * state < -deactivate_slack: | |
731 | * Pen termination of touch | |
732 | * | |
733 | * Specific values of interest | |
734 | * state == activate_slack | |
735 | * no valid input since the last reset | |
736 | * | |
737 | * state == 0 | |
738 | * general operational state | |
739 | * | |
740 | * state == -deactivate_slack | |
741 | * read sufficient empty frames to accept | |
742 | * the end of input and reset | |
743 | */ | |
744 | ||
745 | if (nd->act_state > 0) { /* Currently inactive */ | |
746 | if (value) | |
747 | /* | |
748 | * Consider each live contact as | |
749 | * evidence of intentional activity. | |
750 | */ | |
751 | nd->act_state = (nd->act_state > value) | |
752 | ? nd->act_state - value | |
753 | : 0; | |
754 | else | |
755 | /* | |
756 | * Empty frame before we hit the | |
757 | * activity threshold, reset. | |
758 | */ | |
759 | nd->act_state = nd->activate_slack; | |
760 | ||
761 | /* | |
762 | * Entered this block inactive and no | |
763 | * coordinates sent this frame, so hold off | |
764 | * on button state. | |
765 | */ | |
766 | break; | |
767 | } else { /* Currently active */ | |
768 | if (value && nd->act_state >= | |
769 | nd->deactivate_slack) | |
770 | /* | |
771 | * Live point: clear accumulated | |
772 | * deactivation count. | |
773 | */ | |
774 | nd->act_state = 0; | |
775 | else if (nd->act_state <= nd->deactivate_slack) | |
776 | /* | |
777 | * We've consumed the deactivation | |
778 | * slack, time to deactivate and reset. | |
779 | */ | |
780 | nd->act_state = | |
781 | nd->activate_slack; | |
782 | else { /* Move towards deactivation */ | |
783 | nd->act_state--; | |
784 | break; | |
785 | } | |
786 | } | |
787 | ||
788 | if (nd->first_contact_touch && nd->act_state <= 0) { | |
789 | /* | |
790 | * Check to see if we're ready to start | |
791 | * emitting touch events. | |
792 | * | |
793 | * Note: activation slack will decrease over | |
794 | * the course of the frame, and it will be | |
795 | * inconsistent from the start to the end of | |
796 | * the frame. However if the frame starts | |
797 | * with slack, first_contact_touch will still | |
798 | * be 0 and we will not get to this point. | |
799 | */ | |
ed7e2ca2 | 800 | input_report_key(input, BTN_TOOL_DOUBLETAP, 1); |
dbf2b17d RR |
801 | input_report_key(input, BTN_TOUCH, 1); |
802 | } else { | |
ed7e2ca2 | 803 | input_report_key(input, BTN_TOOL_DOUBLETAP, 0); |
2886539d | 804 | input_report_key(input, BTN_TOUCH, 0); |
dbf2b17d | 805 | } |
57fd637a SC |
806 | break; |
807 | ||
808 | default: | |
369db2a6 | 809 | /* fall-back to the generic hidinput handling */ |
57fd637a SC |
810 | return 0; |
811 | } | |
812 | } | |
813 | ||
814 | /* we have handled the hidinput part, now remains hiddev */ | |
943ed464 RR |
815 | if ((hid->claimed & HID_CLAIMED_HIDDEV) && hid->hiddev_hid_event) |
816 | hid->hiddev_hid_event(hid, field, usage, value); | |
57fd637a SC |
817 | |
818 | return 1; | |
819 | } | |
820 | ||
821 | static int ntrig_probe(struct hid_device *hdev, const struct hid_device_id *id) | |
822 | { | |
823 | int ret; | |
824 | struct ntrig_data *nd; | |
943ed464 RR |
825 | struct hid_input *hidinput; |
826 | struct input_dev *input; | |
6549981b | 827 | struct hid_report *report; |
943ed464 RR |
828 | |
829 | if (id->driver_data) | |
830 | hdev->quirks |= HID_QUIRK_MULTI_INPUT; | |
57fd637a SC |
831 | |
832 | nd = kmalloc(sizeof(struct ntrig_data), GFP_KERNEL); | |
833 | if (!nd) { | |
834 | dev_err(&hdev->dev, "cannot allocate N-Trig data\n"); | |
835 | return -ENOMEM; | |
836 | } | |
dbf2b17d RR |
837 | |
838 | nd->reading_mt = 0; | |
369db2a6 RR |
839 | nd->min_width = 0; |
840 | nd->min_height = 0; | |
841 | nd->activate_slack = activate_slack; | |
842 | nd->act_state = activate_slack; | |
843 | nd->deactivate_slack = -deactivate_slack; | |
844 | nd->sensor_logical_width = 0; | |
845 | nd->sensor_logical_height = 0; | |
846 | nd->sensor_physical_width = 0; | |
847 | nd->sensor_physical_height = 0; | |
848 | ||
57fd637a SC |
849 | hid_set_drvdata(hdev, nd); |
850 | ||
851 | ret = hid_parse(hdev); | |
943ed464 RR |
852 | if (ret) { |
853 | dev_err(&hdev->dev, "parse failed\n"); | |
854 | goto err_free; | |
855 | } | |
856 | ||
857 | ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF); | |
858 | if (ret) { | |
859 | dev_err(&hdev->dev, "hw start failed\n"); | |
860 | goto err_free; | |
861 | } | |
57fd637a | 862 | |
837b4753 | 863 | |
943ed464 | 864 | list_for_each_entry(hidinput, &hdev->inputs, list) { |
2886539d RR |
865 | if (hidinput->report->maxfield < 1) |
866 | continue; | |
867 | ||
943ed464 RR |
868 | input = hidinput->input; |
869 | switch (hidinput->report->field[0]->application) { | |
870 | case HID_DG_PEN: | |
871 | input->name = "N-Trig Pen"; | |
872 | break; | |
873 | case HID_DG_TOUCHSCREEN: | |
2886539d RR |
874 | /* These keys are redundant for fingers, clear them |
875 | * to prevent incorrect identification */ | |
dbf2b17d | 876 | __clear_bit(BTN_TOOL_PEN, input->keybit); |
2886539d RR |
877 | __clear_bit(BTN_TOOL_FINGER, input->keybit); |
878 | __clear_bit(BTN_0, input->keybit); | |
dbf2b17d | 879 | __set_bit(BTN_TOOL_DOUBLETAP, input->keybit); |
943ed464 RR |
880 | /* |
881 | * The physical touchscreen (single touch) | |
882 | * input has a value for physical, whereas | |
883 | * the multitouch only has logical input | |
884 | * fields. | |
885 | */ | |
886 | input->name = | |
887 | (hidinput->report->field[0] | |
888 | ->physical) ? | |
889 | "N-Trig Touchscreen" : | |
890 | "N-Trig MultiTouch"; | |
891 | break; | |
892 | } | |
893 | } | |
894 | ||
c0858552 JK |
895 | /* This is needed for devices with more recent firmware versions */ |
896 | report = hdev->report_enum[HID_FEATURE_REPORT].report_id_hash[0x0a]; | |
6549981b SC |
897 | if (report) |
898 | usbhid_submit_report(hdev, report, USB_DIR_OUT); | |
899 | ||
0277873c RR |
900 | ntrig_report_version(hdev); |
901 | ||
eab32f5f RR |
902 | ret = sysfs_create_group(&hdev->dev.kobj, |
903 | &ntrig_attribute_group); | |
6549981b | 904 | |
943ed464 RR |
905 | return 0; |
906 | err_free: | |
907 | kfree(nd); | |
57fd637a SC |
908 | return ret; |
909 | } | |
910 | ||
911 | static void ntrig_remove(struct hid_device *hdev) | |
912 | { | |
eab32f5f | 913 | sysfs_remove_group(&hdev->dev.kobj, |
a52dc34c | 914 | &ntrig_attribute_group); |
57fd637a SC |
915 | hid_hw_stop(hdev); |
916 | kfree(hid_get_drvdata(hdev)); | |
917 | } | |
918 | ||
94011f93 RR |
919 | static const struct hid_device_id ntrig_devices[] = { |
920 | { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN), | |
921 | .driver_data = NTRIG_DUPLICATE_USAGES }, | |
6e32819e | 922 | { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_1), |
923 | .driver_data = NTRIG_DUPLICATE_USAGES }, | |
924 | { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_2), | |
925 | .driver_data = NTRIG_DUPLICATE_USAGES }, | |
926 | { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_3), | |
927 | .driver_data = NTRIG_DUPLICATE_USAGES }, | |
928 | { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_4), | |
929 | .driver_data = NTRIG_DUPLICATE_USAGES }, | |
930 | { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_5), | |
931 | .driver_data = NTRIG_DUPLICATE_USAGES }, | |
932 | { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_6), | |
933 | .driver_data = NTRIG_DUPLICATE_USAGES }, | |
934 | { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_7), | |
935 | .driver_data = NTRIG_DUPLICATE_USAGES }, | |
936 | { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_8), | |
937 | .driver_data = NTRIG_DUPLICATE_USAGES }, | |
938 | { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_9), | |
939 | .driver_data = NTRIG_DUPLICATE_USAGES }, | |
940 | { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_10), | |
941 | .driver_data = NTRIG_DUPLICATE_USAGES }, | |
942 | { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_11), | |
943 | .driver_data = NTRIG_DUPLICATE_USAGES }, | |
944 | { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_12), | |
945 | .driver_data = NTRIG_DUPLICATE_USAGES }, | |
946 | { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_13), | |
947 | .driver_data = NTRIG_DUPLICATE_USAGES }, | |
948 | { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_14), | |
949 | .driver_data = NTRIG_DUPLICATE_USAGES }, | |
950 | { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_15), | |
951 | .driver_data = NTRIG_DUPLICATE_USAGES }, | |
952 | { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_16), | |
953 | .driver_data = NTRIG_DUPLICATE_USAGES }, | |
954 | { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_17), | |
955 | .driver_data = NTRIG_DUPLICATE_USAGES }, | |
956 | { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_18), | |
957 | .driver_data = NTRIG_DUPLICATE_USAGES }, | |
94011f93 RR |
958 | { } |
959 | }; | |
960 | MODULE_DEVICE_TABLE(hid, ntrig_devices); | |
961 | ||
57fd637a SC |
962 | static const struct hid_usage_id ntrig_grabbed_usages[] = { |
963 | { HID_ANY_ID, HID_ANY_ID, HID_ANY_ID }, | |
943ed464 | 964 | { HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1 } |
57fd637a SC |
965 | }; |
966 | ||
94011f93 RR |
967 | static struct hid_driver ntrig_driver = { |
968 | .name = "ntrig", | |
969 | .id_table = ntrig_devices, | |
57fd637a SC |
970 | .probe = ntrig_probe, |
971 | .remove = ntrig_remove, | |
94011f93 RR |
972 | .input_mapping = ntrig_input_mapping, |
973 | .input_mapped = ntrig_input_mapped, | |
57fd637a SC |
974 | .usage_table = ntrig_grabbed_usages, |
975 | .event = ntrig_event, | |
94011f93 RR |
976 | }; |
977 | ||
a24f423b | 978 | static int __init ntrig_init(void) |
94011f93 RR |
979 | { |
980 | return hid_register_driver(&ntrig_driver); | |
981 | } | |
982 | ||
a24f423b | 983 | static void __exit ntrig_exit(void) |
94011f93 RR |
984 | { |
985 | hid_unregister_driver(&ntrig_driver); | |
986 | } | |
987 | ||
988 | module_init(ntrig_init); | |
989 | module_exit(ntrig_exit); | |
990 | MODULE_LICENSE("GPL"); |