Commit | Line | Data |
---|---|---|
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 | ||
4291ee30 | 133 | hid_info(hdev, "Firmware version: %s (%02x%02x %02x%02x)\n", |
0277873c RR |
134 | buf, data[2], data[3], data[4], data[5]); |
135 | } | |
136 | ||
137 | err_free: | |
138 | kfree(data); | |
139 | } | |
140 | ||
eab32f5f RR |
141 | static ssize_t show_phys_width(struct device *dev, |
142 | struct device_attribute *attr, | |
143 | char *buf) | |
144 | { | |
145 | struct hid_device *hdev = container_of(dev, struct hid_device, dev); | |
146 | struct ntrig_data *nd = hid_get_drvdata(hdev); | |
147 | ||
148 | return sprintf(buf, "%d\n", nd->sensor_physical_width); | |
149 | } | |
150 | ||
151 | static DEVICE_ATTR(sensor_physical_width, S_IRUGO, show_phys_width, NULL); | |
152 | ||
153 | static ssize_t show_phys_height(struct device *dev, | |
154 | struct device_attribute *attr, | |
155 | char *buf) | |
156 | { | |
157 | struct hid_device *hdev = container_of(dev, struct hid_device, dev); | |
158 | struct ntrig_data *nd = hid_get_drvdata(hdev); | |
159 | ||
160 | return sprintf(buf, "%d\n", nd->sensor_physical_height); | |
161 | } | |
162 | ||
163 | static DEVICE_ATTR(sensor_physical_height, S_IRUGO, show_phys_height, NULL); | |
164 | ||
165 | static ssize_t show_log_width(struct device *dev, | |
166 | struct device_attribute *attr, | |
167 | char *buf) | |
168 | { | |
169 | struct hid_device *hdev = container_of(dev, struct hid_device, dev); | |
170 | struct ntrig_data *nd = hid_get_drvdata(hdev); | |
171 | ||
172 | return sprintf(buf, "%d\n", nd->sensor_logical_width); | |
173 | } | |
174 | ||
175 | static DEVICE_ATTR(sensor_logical_width, S_IRUGO, show_log_width, NULL); | |
176 | ||
177 | static ssize_t show_log_height(struct device *dev, | |
178 | struct device_attribute *attr, | |
179 | char *buf) | |
180 | { | |
181 | struct hid_device *hdev = container_of(dev, struct hid_device, dev); | |
182 | struct ntrig_data *nd = hid_get_drvdata(hdev); | |
183 | ||
184 | return sprintf(buf, "%d\n", nd->sensor_logical_height); | |
185 | } | |
186 | ||
187 | static DEVICE_ATTR(sensor_logical_height, S_IRUGO, show_log_height, NULL); | |
188 | ||
189 | static ssize_t show_min_width(struct device *dev, | |
190 | struct device_attribute *attr, | |
191 | char *buf) | |
192 | { | |
193 | struct hid_device *hdev = container_of(dev, struct hid_device, dev); | |
194 | struct ntrig_data *nd = hid_get_drvdata(hdev); | |
195 | ||
196 | return sprintf(buf, "%d\n", nd->min_width * | |
197 | nd->sensor_physical_width / | |
198 | nd->sensor_logical_width); | |
199 | } | |
200 | ||
201 | static ssize_t set_min_width(struct device *dev, | |
202 | struct device_attribute *attr, | |
203 | const char *buf, size_t count) | |
204 | { | |
205 | struct hid_device *hdev = container_of(dev, struct hid_device, dev); | |
206 | struct ntrig_data *nd = hid_get_drvdata(hdev); | |
207 | ||
208 | unsigned long val; | |
209 | ||
210 | if (strict_strtoul(buf, 0, &val)) | |
211 | return -EINVAL; | |
212 | ||
213 | if (val > nd->sensor_physical_width) | |
214 | return -EINVAL; | |
215 | ||
216 | nd->min_width = val * nd->sensor_logical_width / | |
217 | nd->sensor_physical_width; | |
218 | ||
219 | return count; | |
220 | } | |
221 | ||
222 | static DEVICE_ATTR(min_width, S_IWUSR | S_IRUGO, show_min_width, set_min_width); | |
223 | ||
224 | static ssize_t show_min_height(struct device *dev, | |
225 | struct device_attribute *attr, | |
226 | char *buf) | |
227 | { | |
228 | struct hid_device *hdev = container_of(dev, struct hid_device, dev); | |
229 | struct ntrig_data *nd = hid_get_drvdata(hdev); | |
230 | ||
231 | return sprintf(buf, "%d\n", nd->min_height * | |
232 | nd->sensor_physical_height / | |
233 | nd->sensor_logical_height); | |
234 | } | |
235 | ||
236 | static ssize_t set_min_height(struct device *dev, | |
237 | struct device_attribute *attr, | |
238 | const char *buf, size_t count) | |
239 | { | |
240 | struct hid_device *hdev = container_of(dev, struct hid_device, dev); | |
241 | struct ntrig_data *nd = hid_get_drvdata(hdev); | |
242 | ||
243 | unsigned long val; | |
244 | ||
245 | if (strict_strtoul(buf, 0, &val)) | |
246 | return -EINVAL; | |
247 | ||
248 | if (val > nd->sensor_physical_height) | |
249 | return -EINVAL; | |
250 | ||
251 | nd->min_height = val * nd->sensor_logical_height / | |
252 | nd->sensor_physical_height; | |
253 | ||
254 | return count; | |
255 | } | |
256 | ||
257 | static DEVICE_ATTR(min_height, S_IWUSR | S_IRUGO, show_min_height, | |
258 | set_min_height); | |
259 | ||
260 | static ssize_t show_activate_slack(struct device *dev, | |
261 | struct device_attribute *attr, | |
262 | char *buf) | |
263 | { | |
264 | struct hid_device *hdev = container_of(dev, struct hid_device, dev); | |
265 | struct ntrig_data *nd = hid_get_drvdata(hdev); | |
266 | ||
267 | return sprintf(buf, "%d\n", nd->activate_slack); | |
268 | } | |
269 | ||
270 | static ssize_t set_activate_slack(struct device *dev, | |
271 | struct device_attribute *attr, | |
272 | const char *buf, size_t count) | |
273 | { | |
274 | struct hid_device *hdev = container_of(dev, struct hid_device, dev); | |
275 | struct ntrig_data *nd = hid_get_drvdata(hdev); | |
276 | ||
277 | unsigned long val; | |
278 | ||
279 | if (strict_strtoul(buf, 0, &val)) | |
280 | return -EINVAL; | |
281 | ||
282 | if (val > 0x7f) | |
283 | return -EINVAL; | |
284 | ||
285 | nd->activate_slack = val; | |
286 | ||
287 | return count; | |
288 | } | |
289 | ||
290 | static DEVICE_ATTR(activate_slack, S_IWUSR | S_IRUGO, show_activate_slack, | |
291 | set_activate_slack); | |
292 | ||
293 | static ssize_t show_activation_width(struct device *dev, | |
294 | struct device_attribute *attr, | |
295 | char *buf) | |
296 | { | |
297 | struct hid_device *hdev = container_of(dev, struct hid_device, dev); | |
298 | struct ntrig_data *nd = hid_get_drvdata(hdev); | |
299 | ||
300 | return sprintf(buf, "%d\n", nd->activation_width * | |
301 | nd->sensor_physical_width / | |
302 | nd->sensor_logical_width); | |
303 | } | |
304 | ||
305 | static ssize_t set_activation_width(struct device *dev, | |
306 | struct device_attribute *attr, | |
307 | const char *buf, size_t count) | |
308 | { | |
309 | struct hid_device *hdev = container_of(dev, struct hid_device, dev); | |
310 | struct ntrig_data *nd = hid_get_drvdata(hdev); | |
311 | ||
312 | unsigned long val; | |
313 | ||
314 | if (strict_strtoul(buf, 0, &val)) | |
315 | return -EINVAL; | |
316 | ||
317 | if (val > nd->sensor_physical_width) | |
318 | return -EINVAL; | |
319 | ||
320 | nd->activation_width = val * nd->sensor_logical_width / | |
321 | nd->sensor_physical_width; | |
322 | ||
323 | return count; | |
324 | } | |
325 | ||
326 | static DEVICE_ATTR(activation_width, S_IWUSR | S_IRUGO, show_activation_width, | |
327 | set_activation_width); | |
328 | ||
329 | static ssize_t show_activation_height(struct device *dev, | |
330 | struct device_attribute *attr, | |
331 | char *buf) | |
332 | { | |
333 | struct hid_device *hdev = container_of(dev, struct hid_device, dev); | |
334 | struct ntrig_data *nd = hid_get_drvdata(hdev); | |
335 | ||
336 | return sprintf(buf, "%d\n", nd->activation_height * | |
337 | nd->sensor_physical_height / | |
338 | nd->sensor_logical_height); | |
339 | } | |
340 | ||
341 | static ssize_t set_activation_height(struct device *dev, | |
342 | struct device_attribute *attr, | |
343 | const char *buf, size_t count) | |
344 | { | |
345 | struct hid_device *hdev = container_of(dev, struct hid_device, dev); | |
346 | struct ntrig_data *nd = hid_get_drvdata(hdev); | |
347 | ||
348 | unsigned long val; | |
349 | ||
350 | if (strict_strtoul(buf, 0, &val)) | |
351 | return -EINVAL; | |
352 | ||
353 | if (val > nd->sensor_physical_height) | |
354 | return -EINVAL; | |
355 | ||
356 | nd->activation_height = val * nd->sensor_logical_height / | |
357 | nd->sensor_physical_height; | |
358 | ||
359 | return count; | |
360 | } | |
361 | ||
362 | static DEVICE_ATTR(activation_height, S_IWUSR | S_IRUGO, | |
363 | show_activation_height, set_activation_height); | |
364 | ||
365 | static ssize_t show_deactivate_slack(struct device *dev, | |
366 | struct device_attribute *attr, | |
367 | char *buf) | |
368 | { | |
369 | struct hid_device *hdev = container_of(dev, struct hid_device, dev); | |
370 | struct ntrig_data *nd = hid_get_drvdata(hdev); | |
371 | ||
372 | return sprintf(buf, "%d\n", -nd->deactivate_slack); | |
373 | } | |
374 | ||
375 | static ssize_t set_deactivate_slack(struct device *dev, | |
376 | struct device_attribute *attr, | |
377 | const char *buf, size_t count) | |
378 | { | |
379 | struct hid_device *hdev = container_of(dev, struct hid_device, dev); | |
380 | struct ntrig_data *nd = hid_get_drvdata(hdev); | |
381 | ||
382 | unsigned long val; | |
383 | ||
384 | if (strict_strtoul(buf, 0, &val)) | |
385 | return -EINVAL; | |
386 | ||
387 | /* | |
388 | * No more than 8 terminal frames have been observed so far | |
389 | * and higher slack is highly likely to leave the single | |
390 | * touch emulation stuck down. | |
391 | */ | |
392 | if (val > 7) | |
393 | return -EINVAL; | |
394 | ||
395 | nd->deactivate_slack = -val; | |
396 | ||
397 | return count; | |
398 | } | |
399 | ||
400 | static DEVICE_ATTR(deactivate_slack, S_IWUSR | S_IRUGO, show_deactivate_slack, | |
401 | set_deactivate_slack); | |
402 | ||
403 | static struct attribute *sysfs_attrs[] = { | |
404 | &dev_attr_sensor_physical_width.attr, | |
405 | &dev_attr_sensor_physical_height.attr, | |
406 | &dev_attr_sensor_logical_width.attr, | |
407 | &dev_attr_sensor_logical_height.attr, | |
408 | &dev_attr_min_height.attr, | |
409 | &dev_attr_min_width.attr, | |
410 | &dev_attr_activate_slack.attr, | |
411 | &dev_attr_activation_width.attr, | |
412 | &dev_attr_activation_height.attr, | |
413 | &dev_attr_deactivate_slack.attr, | |
414 | NULL | |
415 | }; | |
416 | ||
417 | static struct attribute_group ntrig_attribute_group = { | |
418 | .attrs = sysfs_attrs | |
419 | }; | |
420 | ||
57fd637a SC |
421 | /* |
422 | * this driver is aimed at two firmware versions in circulation: | |
423 | * - dual pen/finger single touch | |
424 | * - finger multitouch, pen not working | |
425 | */ | |
426 | ||
94011f93 | 427 | static int ntrig_input_mapping(struct hid_device *hdev, struct hid_input *hi, |
a52dc34c RR |
428 | struct hid_field *field, struct hid_usage *usage, |
429 | unsigned long **bit, int *max) | |
94011f93 | 430 | { |
369db2a6 RR |
431 | struct ntrig_data *nd = hid_get_drvdata(hdev); |
432 | ||
dbf2b17d RR |
433 | /* No special mappings needed for the pen and single touch */ |
434 | if (field->physical) | |
943ed464 RR |
435 | return 0; |
436 | ||
57fd637a | 437 | switch (usage->hid & HID_USAGE_PAGE) { |
57fd637a SC |
438 | case HID_UP_GENDESK: |
439 | switch (usage->hid) { | |
440 | case HID_GD_X: | |
441 | hid_map_usage(hi, usage, bit, max, | |
442 | EV_ABS, ABS_MT_POSITION_X); | |
443 | input_set_abs_params(hi->input, ABS_X, | |
444 | field->logical_minimum, | |
445 | field->logical_maximum, 0, 0); | |
369db2a6 RR |
446 | |
447 | if (!nd->sensor_logical_width) { | |
448 | nd->sensor_logical_width = | |
449 | field->logical_maximum - | |
450 | field->logical_minimum; | |
451 | nd->sensor_physical_width = | |
452 | field->physical_maximum - | |
453 | field->physical_minimum; | |
454 | nd->activation_width = activation_width * | |
455 | nd->sensor_logical_width / | |
456 | nd->sensor_physical_width; | |
457 | nd->min_width = min_width * | |
458 | nd->sensor_logical_width / | |
459 | nd->sensor_physical_width; | |
460 | } | |
57fd637a SC |
461 | return 1; |
462 | case HID_GD_Y: | |
463 | hid_map_usage(hi, usage, bit, max, | |
464 | EV_ABS, ABS_MT_POSITION_Y); | |
465 | input_set_abs_params(hi->input, ABS_Y, | |
466 | field->logical_minimum, | |
467 | field->logical_maximum, 0, 0); | |
369db2a6 RR |
468 | |
469 | if (!nd->sensor_logical_height) { | |
470 | nd->sensor_logical_height = | |
471 | field->logical_maximum - | |
472 | field->logical_minimum; | |
473 | nd->sensor_physical_height = | |
474 | field->physical_maximum - | |
475 | field->physical_minimum; | |
476 | nd->activation_height = activation_height * | |
477 | nd->sensor_logical_height / | |
478 | nd->sensor_physical_height; | |
479 | nd->min_height = min_height * | |
480 | nd->sensor_logical_height / | |
481 | nd->sensor_physical_height; | |
482 | } | |
57fd637a SC |
483 | return 1; |
484 | } | |
485 | return 0; | |
486 | ||
487 | case HID_UP_DIGITIZER: | |
488 | switch (usage->hid) { | |
489 | /* we do not want to map these for now */ | |
dbf2b17d | 490 | case HID_DG_CONTACTID: /* Not trustworthy, squelch for now */ |
57fd637a SC |
491 | case HID_DG_INPUTMODE: |
492 | case HID_DG_DEVICEINDEX: | |
57fd637a SC |
493 | case HID_DG_CONTACTMAX: |
494 | return -1; | |
495 | ||
57fd637a SC |
496 | /* width/height mapped on TouchMajor/TouchMinor/Orientation */ |
497 | case HID_DG_WIDTH: | |
498 | hid_map_usage(hi, usage, bit, max, | |
a52dc34c | 499 | EV_ABS, ABS_MT_TOUCH_MAJOR); |
57fd637a SC |
500 | return 1; |
501 | case HID_DG_HEIGHT: | |
502 | hid_map_usage(hi, usage, bit, max, | |
a52dc34c | 503 | EV_ABS, ABS_MT_TOUCH_MINOR); |
57fd637a | 504 | input_set_abs_params(hi->input, ABS_MT_ORIENTATION, |
a52dc34c | 505 | 0, 1, 0, 0); |
57fd637a SC |
506 | return 1; |
507 | } | |
508 | return 0; | |
509 | ||
510 | case 0xff000000: | |
511 | /* we do not want to map these: no input-oriented meaning */ | |
512 | return -1; | |
94011f93 | 513 | } |
57fd637a | 514 | |
94011f93 RR |
515 | return 0; |
516 | } | |
517 | ||
518 | static int ntrig_input_mapped(struct hid_device *hdev, struct hid_input *hi, | |
a52dc34c RR |
519 | struct hid_field *field, struct hid_usage *usage, |
520 | unsigned long **bit, int *max) | |
94011f93 | 521 | { |
dbf2b17d RR |
522 | /* No special mappings needed for the pen and single touch */ |
523 | if (field->physical) | |
943ed464 | 524 | return 0; |
b0549cf1 | 525 | |
94011f93 RR |
526 | if (usage->type == EV_KEY || usage->type == EV_REL |
527 | || usage->type == EV_ABS) | |
528 | clear_bit(usage->code, *bit); | |
529 | ||
530 | return 0; | |
531 | } | |
57fd637a SC |
532 | |
533 | /* | |
534 | * this function is called upon all reports | |
535 | * so that we can filter contact point information, | |
536 | * decide whether we are in multi or single touch mode | |
537 | * and call input_mt_sync after each point if necessary | |
538 | */ | |
539 | static int ntrig_event (struct hid_device *hid, struct hid_field *field, | |
a52dc34c | 540 | struct hid_usage *usage, __s32 value) |
57fd637a SC |
541 | { |
542 | struct input_dev *input = field->hidinput->input; | |
543 | struct ntrig_data *nd = hid_get_drvdata(hid); | |
544 | ||
943ed464 RR |
545 | /* No special handling needed for the pen */ |
546 | if (field->application == HID_DG_PEN) | |
547 | return 0; | |
548 | ||
57fd637a SC |
549 | if (hid->claimed & HID_CLAIMED_INPUT) { |
550 | switch (usage->hid) { | |
dbf2b17d RR |
551 | case 0xff000001: |
552 | /* Tag indicating the start of a multitouch group */ | |
553 | nd->reading_mt = 1; | |
250d3775 | 554 | nd->first_contact_touch = 0; |
dbf2b17d | 555 | break; |
2886539d | 556 | case HID_DG_TIPSWITCH: |
250d3775 | 557 | nd->tipswitch = value; |
2886539d RR |
558 | /* Prevent emission of touch until validated */ |
559 | return 1; | |
dbf2b17d RR |
560 | case HID_DG_CONFIDENCE: |
561 | nd->confidence = value; | |
562 | break; | |
57fd637a SC |
563 | case HID_GD_X: |
564 | nd->x = value; | |
dbf2b17d RR |
565 | /* Clear the contact footer */ |
566 | nd->mt_foot_count = 0; | |
57fd637a SC |
567 | break; |
568 | case HID_GD_Y: | |
569 | nd->y = value; | |
570 | break; | |
571 | case HID_DG_CONTACTID: | |
572 | nd->id = value; | |
57fd637a SC |
573 | break; |
574 | case HID_DG_WIDTH: | |
575 | nd->w = value; | |
576 | break; | |
577 | case HID_DG_HEIGHT: | |
578 | nd->h = value; | |
579 | /* | |
580 | * when in single touch mode, this is the last | |
581 | * report received in a finger event. We want | |
582 | * to emit a normal (X, Y) position | |
583 | */ | |
dbf2b17d | 584 | if (!nd->reading_mt) { |
250d3775 RR |
585 | /* |
586 | * TipSwitch indicates the presence of a | |
587 | * finger in single touch mode. | |
588 | */ | |
2170c5a8 | 589 | input_report_key(input, BTN_TOUCH, |
250d3775 RR |
590 | nd->tipswitch); |
591 | input_report_key(input, BTN_TOOL_DOUBLETAP, | |
592 | nd->tipswitch); | |
57fd637a SC |
593 | input_event(input, EV_ABS, ABS_X, nd->x); |
594 | input_event(input, EV_ABS, ABS_Y, nd->y); | |
57fd637a SC |
595 | } |
596 | break; | |
597 | case 0xff000002: | |
598 | /* | |
599 | * we receive this when the device is in multitouch | |
600 | * mode. The first of the three values tagged with | |
601 | * this usage tells if the contact point is real | |
602 | * or a placeholder | |
603 | */ | |
dbf2b17d RR |
604 | |
605 | /* Shouldn't get more than 4 footer packets, so skip */ | |
606 | if (nd->mt_foot_count >= 4) | |
607 | break; | |
608 | ||
609 | nd->mt_footer[nd->mt_foot_count++] = value; | |
610 | ||
611 | /* if the footer isn't complete break */ | |
612 | if (nd->mt_foot_count != 4) | |
613 | break; | |
614 | ||
369db2a6 | 615 | /* Pen activity signal. */ |
dbf2b17d | 616 | if (nd->mt_footer[2]) { |
369db2a6 RR |
617 | /* |
618 | * When the pen deactivates touch, we see a | |
619 | * bogus frame with ContactCount > 0. | |
620 | * We can | |
621 | * save a bit of work by ensuring act_state < 0 | |
622 | * even if deactivation slack is turned off. | |
623 | */ | |
624 | nd->act_state = deactivate_slack - 1; | |
dbf2b17d | 625 | nd->confidence = 0; |
57fd637a | 626 | break; |
dbf2b17d RR |
627 | } |
628 | ||
369db2a6 RR |
629 | /* |
630 | * The first footer value indicates the presence of a | |
631 | * finger. | |
632 | */ | |
633 | if (nd->mt_footer[0]) { | |
634 | /* | |
635 | * We do not want to process contacts under | |
636 | * the size threshold, but do not want to | |
637 | * ignore them for activation state | |
638 | */ | |
639 | if (nd->w < nd->min_width || | |
640 | nd->h < nd->min_height) | |
641 | nd->confidence = 0; | |
642 | } else | |
dbf2b17d | 643 | break; |
369db2a6 RR |
644 | |
645 | if (nd->act_state > 0) { | |
646 | /* | |
647 | * Contact meets the activation size threshold | |
648 | */ | |
649 | if (nd->w >= nd->activation_width && | |
650 | nd->h >= nd->activation_height) { | |
651 | if (nd->id) | |
652 | /* | |
653 | * first contact, activate now | |
654 | */ | |
655 | nd->act_state = 0; | |
656 | else { | |
657 | /* | |
658 | * avoid corrupting this frame | |
659 | * but ensure next frame will | |
660 | * be active | |
661 | */ | |
662 | nd->act_state = 1; | |
663 | break; | |
664 | } | |
665 | } else | |
666 | /* | |
667 | * Defer adjusting the activation state | |
668 | * until the end of the frame. | |
669 | */ | |
670 | break; | |
dbf2b17d RR |
671 | } |
672 | ||
369db2a6 RR |
673 | /* Discarding this contact */ |
674 | if (!nd->confidence) | |
675 | break; | |
676 | ||
57fd637a SC |
677 | /* emit a normal (X, Y) for the first point only */ |
678 | if (nd->id == 0) { | |
250d3775 RR |
679 | /* |
680 | * TipSwitch is superfluous in multitouch | |
681 | * mode. The footer events tell us | |
682 | * if there is a finger on the screen or | |
683 | * not. | |
684 | */ | |
685 | nd->first_contact_touch = nd->confidence; | |
57fd637a SC |
686 | input_event(input, EV_ABS, ABS_X, nd->x); |
687 | input_event(input, EV_ABS, ABS_Y, nd->y); | |
688 | } | |
369db2a6 RR |
689 | |
690 | /* Emit MT events */ | |
57fd637a SC |
691 | input_event(input, EV_ABS, ABS_MT_POSITION_X, nd->x); |
692 | input_event(input, EV_ABS, ABS_MT_POSITION_Y, nd->y); | |
369db2a6 RR |
693 | |
694 | /* | |
695 | * Translate from height and width to size | |
696 | * and orientation. | |
697 | */ | |
57fd637a SC |
698 | if (nd->w > nd->h) { |
699 | input_event(input, EV_ABS, | |
700 | ABS_MT_ORIENTATION, 1); | |
701 | input_event(input, EV_ABS, | |
702 | ABS_MT_TOUCH_MAJOR, nd->w); | |
703 | input_event(input, EV_ABS, | |
704 | ABS_MT_TOUCH_MINOR, nd->h); | |
705 | } else { | |
706 | input_event(input, EV_ABS, | |
707 | ABS_MT_ORIENTATION, 0); | |
708 | input_event(input, EV_ABS, | |
709 | ABS_MT_TOUCH_MAJOR, nd->h); | |
710 | input_event(input, EV_ABS, | |
711 | ABS_MT_TOUCH_MINOR, nd->w); | |
712 | } | |
713 | input_mt_sync(field->hidinput->input); | |
dbf2b17d RR |
714 | break; |
715 | ||
716 | case HID_DG_CONTACTCOUNT: /* End of a multitouch group */ | |
369db2a6 | 717 | if (!nd->reading_mt) /* Just to be sure */ |
dbf2b17d RR |
718 | break; |
719 | ||
720 | nd->reading_mt = 0; | |
721 | ||
369db2a6 RR |
722 | |
723 | /* | |
724 | * Activation state machine logic: | |
725 | * | |
726 | * Fundamental states: | |
727 | * state > 0: Inactive | |
728 | * state <= 0: Active | |
729 | * state < -deactivate_slack: | |
730 | * Pen termination of touch | |
731 | * | |
732 | * Specific values of interest | |
733 | * state == activate_slack | |
734 | * no valid input since the last reset | |
735 | * | |
736 | * state == 0 | |
737 | * general operational state | |
738 | * | |
739 | * state == -deactivate_slack | |
740 | * read sufficient empty frames to accept | |
741 | * the end of input and reset | |
742 | */ | |
743 | ||
744 | if (nd->act_state > 0) { /* Currently inactive */ | |
745 | if (value) | |
746 | /* | |
747 | * Consider each live contact as | |
748 | * evidence of intentional activity. | |
749 | */ | |
750 | nd->act_state = (nd->act_state > value) | |
751 | ? nd->act_state - value | |
752 | : 0; | |
753 | else | |
754 | /* | |
755 | * Empty frame before we hit the | |
756 | * activity threshold, reset. | |
757 | */ | |
758 | nd->act_state = nd->activate_slack; | |
759 | ||
760 | /* | |
761 | * Entered this block inactive and no | |
762 | * coordinates sent this frame, so hold off | |
763 | * on button state. | |
764 | */ | |
765 | break; | |
766 | } else { /* Currently active */ | |
767 | if (value && nd->act_state >= | |
768 | nd->deactivate_slack) | |
769 | /* | |
770 | * Live point: clear accumulated | |
771 | * deactivation count. | |
772 | */ | |
773 | nd->act_state = 0; | |
774 | else if (nd->act_state <= nd->deactivate_slack) | |
775 | /* | |
776 | * We've consumed the deactivation | |
777 | * slack, time to deactivate and reset. | |
778 | */ | |
779 | nd->act_state = | |
780 | nd->activate_slack; | |
781 | else { /* Move towards deactivation */ | |
782 | nd->act_state--; | |
783 | break; | |
784 | } | |
785 | } | |
786 | ||
787 | if (nd->first_contact_touch && nd->act_state <= 0) { | |
788 | /* | |
789 | * Check to see if we're ready to start | |
790 | * emitting touch events. | |
791 | * | |
792 | * Note: activation slack will decrease over | |
793 | * the course of the frame, and it will be | |
794 | * inconsistent from the start to the end of | |
795 | * the frame. However if the frame starts | |
796 | * with slack, first_contact_touch will still | |
797 | * be 0 and we will not get to this point. | |
798 | */ | |
ed7e2ca2 | 799 | input_report_key(input, BTN_TOOL_DOUBLETAP, 1); |
dbf2b17d RR |
800 | input_report_key(input, BTN_TOUCH, 1); |
801 | } else { | |
ed7e2ca2 | 802 | input_report_key(input, BTN_TOOL_DOUBLETAP, 0); |
2886539d | 803 | input_report_key(input, BTN_TOUCH, 0); |
dbf2b17d | 804 | } |
57fd637a SC |
805 | break; |
806 | ||
807 | default: | |
369db2a6 | 808 | /* fall-back to the generic hidinput handling */ |
57fd637a SC |
809 | return 0; |
810 | } | |
811 | } | |
812 | ||
813 | /* we have handled the hidinput part, now remains hiddev */ | |
943ed464 RR |
814 | if ((hid->claimed & HID_CLAIMED_HIDDEV) && hid->hiddev_hid_event) |
815 | hid->hiddev_hid_event(hid, field, usage, value); | |
57fd637a SC |
816 | |
817 | return 1; | |
818 | } | |
819 | ||
820 | static int ntrig_probe(struct hid_device *hdev, const struct hid_device_id *id) | |
821 | { | |
822 | int ret; | |
823 | struct ntrig_data *nd; | |
943ed464 RR |
824 | struct hid_input *hidinput; |
825 | struct input_dev *input; | |
6549981b | 826 | struct hid_report *report; |
943ed464 RR |
827 | |
828 | if (id->driver_data) | |
829 | hdev->quirks |= HID_QUIRK_MULTI_INPUT; | |
57fd637a SC |
830 | |
831 | nd = kmalloc(sizeof(struct ntrig_data), GFP_KERNEL); | |
832 | if (!nd) { | |
4291ee30 | 833 | hid_err(hdev, "cannot allocate N-Trig data\n"); |
57fd637a SC |
834 | return -ENOMEM; |
835 | } | |
dbf2b17d RR |
836 | |
837 | nd->reading_mt = 0; | |
369db2a6 RR |
838 | nd->min_width = 0; |
839 | nd->min_height = 0; | |
840 | nd->activate_slack = activate_slack; | |
841 | nd->act_state = activate_slack; | |
842 | nd->deactivate_slack = -deactivate_slack; | |
843 | nd->sensor_logical_width = 0; | |
844 | nd->sensor_logical_height = 0; | |
845 | nd->sensor_physical_width = 0; | |
846 | nd->sensor_physical_height = 0; | |
847 | ||
57fd637a SC |
848 | hid_set_drvdata(hdev, nd); |
849 | ||
850 | ret = hid_parse(hdev); | |
943ed464 | 851 | if (ret) { |
4291ee30 | 852 | hid_err(hdev, "parse failed\n"); |
943ed464 RR |
853 | goto err_free; |
854 | } | |
855 | ||
856 | ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF); | |
857 | if (ret) { | |
4291ee30 | 858 | hid_err(hdev, "hw start failed\n"); |
943ed464 RR |
859 | goto err_free; |
860 | } | |
57fd637a | 861 | |
837b4753 | 862 | |
943ed464 | 863 | list_for_each_entry(hidinput, &hdev->inputs, list) { |
2886539d RR |
864 | if (hidinput->report->maxfield < 1) |
865 | continue; | |
866 | ||
943ed464 RR |
867 | input = hidinput->input; |
868 | switch (hidinput->report->field[0]->application) { | |
869 | case HID_DG_PEN: | |
870 | input->name = "N-Trig Pen"; | |
871 | break; | |
872 | case HID_DG_TOUCHSCREEN: | |
2886539d RR |
873 | /* These keys are redundant for fingers, clear them |
874 | * to prevent incorrect identification */ | |
dbf2b17d | 875 | __clear_bit(BTN_TOOL_PEN, input->keybit); |
2886539d RR |
876 | __clear_bit(BTN_TOOL_FINGER, input->keybit); |
877 | __clear_bit(BTN_0, input->keybit); | |
dbf2b17d | 878 | __set_bit(BTN_TOOL_DOUBLETAP, input->keybit); |
943ed464 RR |
879 | /* |
880 | * The physical touchscreen (single touch) | |
881 | * input has a value for physical, whereas | |
882 | * the multitouch only has logical input | |
883 | * fields. | |
884 | */ | |
885 | input->name = | |
886 | (hidinput->report->field[0] | |
887 | ->physical) ? | |
888 | "N-Trig Touchscreen" : | |
889 | "N-Trig MultiTouch"; | |
890 | break; | |
891 | } | |
892 | } | |
893 | ||
c0858552 JK |
894 | /* This is needed for devices with more recent firmware versions */ |
895 | report = hdev->report_enum[HID_FEATURE_REPORT].report_id_hash[0x0a]; | |
6549981b SC |
896 | if (report) |
897 | usbhid_submit_report(hdev, report, USB_DIR_OUT); | |
898 | ||
0277873c RR |
899 | ntrig_report_version(hdev); |
900 | ||
eab32f5f RR |
901 | ret = sysfs_create_group(&hdev->dev.kobj, |
902 | &ntrig_attribute_group); | |
6549981b | 903 | |
943ed464 RR |
904 | return 0; |
905 | err_free: | |
906 | kfree(nd); | |
57fd637a SC |
907 | return ret; |
908 | } | |
909 | ||
910 | static void ntrig_remove(struct hid_device *hdev) | |
911 | { | |
eab32f5f | 912 | sysfs_remove_group(&hdev->dev.kobj, |
a52dc34c | 913 | &ntrig_attribute_group); |
57fd637a SC |
914 | hid_hw_stop(hdev); |
915 | kfree(hid_get_drvdata(hdev)); | |
916 | } | |
917 | ||
94011f93 RR |
918 | static const struct hid_device_id ntrig_devices[] = { |
919 | { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN), | |
920 | .driver_data = NTRIG_DUPLICATE_USAGES }, | |
6e32819e | 921 | { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_1), |
922 | .driver_data = NTRIG_DUPLICATE_USAGES }, | |
923 | { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_2), | |
924 | .driver_data = NTRIG_DUPLICATE_USAGES }, | |
925 | { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_3), | |
926 | .driver_data = NTRIG_DUPLICATE_USAGES }, | |
927 | { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_4), | |
928 | .driver_data = NTRIG_DUPLICATE_USAGES }, | |
929 | { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_5), | |
930 | .driver_data = NTRIG_DUPLICATE_USAGES }, | |
931 | { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_6), | |
932 | .driver_data = NTRIG_DUPLICATE_USAGES }, | |
933 | { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_7), | |
934 | .driver_data = NTRIG_DUPLICATE_USAGES }, | |
935 | { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_8), | |
936 | .driver_data = NTRIG_DUPLICATE_USAGES }, | |
937 | { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_9), | |
938 | .driver_data = NTRIG_DUPLICATE_USAGES }, | |
939 | { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_10), | |
940 | .driver_data = NTRIG_DUPLICATE_USAGES }, | |
941 | { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_11), | |
942 | .driver_data = NTRIG_DUPLICATE_USAGES }, | |
943 | { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_12), | |
944 | .driver_data = NTRIG_DUPLICATE_USAGES }, | |
945 | { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_13), | |
946 | .driver_data = NTRIG_DUPLICATE_USAGES }, | |
947 | { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_14), | |
948 | .driver_data = NTRIG_DUPLICATE_USAGES }, | |
949 | { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_15), | |
950 | .driver_data = NTRIG_DUPLICATE_USAGES }, | |
951 | { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_16), | |
952 | .driver_data = NTRIG_DUPLICATE_USAGES }, | |
953 | { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_17), | |
954 | .driver_data = NTRIG_DUPLICATE_USAGES }, | |
955 | { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_18), | |
956 | .driver_data = NTRIG_DUPLICATE_USAGES }, | |
94011f93 RR |
957 | { } |
958 | }; | |
959 | MODULE_DEVICE_TABLE(hid, ntrig_devices); | |
960 | ||
57fd637a SC |
961 | static const struct hid_usage_id ntrig_grabbed_usages[] = { |
962 | { HID_ANY_ID, HID_ANY_ID, HID_ANY_ID }, | |
943ed464 | 963 | { HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1 } |
57fd637a SC |
964 | }; |
965 | ||
94011f93 RR |
966 | static struct hid_driver ntrig_driver = { |
967 | .name = "ntrig", | |
968 | .id_table = ntrig_devices, | |
57fd637a SC |
969 | .probe = ntrig_probe, |
970 | .remove = ntrig_remove, | |
94011f93 RR |
971 | .input_mapping = ntrig_input_mapping, |
972 | .input_mapped = ntrig_input_mapped, | |
57fd637a SC |
973 | .usage_table = ntrig_grabbed_usages, |
974 | .event = ntrig_event, | |
94011f93 RR |
975 | }; |
976 | ||
a24f423b | 977 | static int __init ntrig_init(void) |
94011f93 RR |
978 | { |
979 | return hid_register_driver(&ntrig_driver); | |
980 | } | |
981 | ||
a24f423b | 982 | static void __exit ntrig_exit(void) |
94011f93 RR |
983 | { |
984 | hid_unregister_driver(&ntrig_driver); | |
985 | } | |
986 | ||
987 | module_init(ntrig_init); | |
988 | module_exit(ntrig_exit); | |
989 | MODULE_LICENSE("GPL"); |