hid-multitouch.c 30 KB

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  1. /*
  2. * HID driver for multitouch panels
  3. *
  4. * Copyright (c) 2010-2012 Stephane Chatty <chatty@enac.fr>
  5. * Copyright (c) 2010-2012 Benjamin Tissoires <benjamin.tissoires@gmail.com>
  6. * Copyright (c) 2010-2012 Ecole Nationale de l'Aviation Civile, France
  7. *
  8. * This code is partly based on hid-egalax.c:
  9. *
  10. * Copyright (c) 2010 Stephane Chatty <chatty@enac.fr>
  11. * Copyright (c) 2010 Henrik Rydberg <rydberg@euromail.se>
  12. * Copyright (c) 2010 Canonical, Ltd.
  13. *
  14. * This code is partly based on hid-3m-pct.c:
  15. *
  16. * Copyright (c) 2009-2010 Stephane Chatty <chatty@enac.fr>
  17. * Copyright (c) 2010 Henrik Rydberg <rydberg@euromail.se>
  18. * Copyright (c) 2010 Canonical, Ltd.
  19. *
  20. */
  21. /*
  22. * This program is free software; you can redistribute it and/or modify it
  23. * under the terms of the GNU General Public License as published by the Free
  24. * Software Foundation; either version 2 of the License, or (at your option)
  25. * any later version.
  26. */
  27. #include <linux/device.h>
  28. #include <linux/hid.h>
  29. #include <linux/module.h>
  30. #include <linux/slab.h>
  31. #include <linux/usb.h>
  32. #include <linux/input/mt.h>
  33. #include "usbhid/usbhid.h"
  34. MODULE_AUTHOR("Stephane Chatty <chatty@enac.fr>");
  35. MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>");
  36. MODULE_DESCRIPTION("HID multitouch panels");
  37. MODULE_LICENSE("GPL");
  38. #include "hid-ids.h"
  39. /* quirks to control the device */
  40. #define MT_QUIRK_NOT_SEEN_MEANS_UP (1 << 0)
  41. #define MT_QUIRK_SLOT_IS_CONTACTID (1 << 1)
  42. #define MT_QUIRK_CYPRESS (1 << 2)
  43. #define MT_QUIRK_SLOT_IS_CONTACTNUMBER (1 << 3)
  44. #define MT_QUIRK_ALWAYS_VALID (1 << 4)
  45. #define MT_QUIRK_VALID_IS_INRANGE (1 << 5)
  46. #define MT_QUIRK_VALID_IS_CONFIDENCE (1 << 6)
  47. #define MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE (1 << 8)
  48. struct mt_slot {
  49. __s32 x, y, p, w, h;
  50. __s32 contactid; /* the device ContactID assigned to this slot */
  51. bool touch_state; /* is the touch valid? */
  52. bool seen_in_this_frame;/* has this slot been updated */
  53. };
  54. struct mt_class {
  55. __s32 name; /* MT_CLS */
  56. __s32 quirks;
  57. __s32 sn_move; /* Signal/noise ratio for move events */
  58. __s32 sn_width; /* Signal/noise ratio for width events */
  59. __s32 sn_height; /* Signal/noise ratio for height events */
  60. __s32 sn_pressure; /* Signal/noise ratio for pressure events */
  61. __u8 maxcontacts;
  62. bool is_indirect; /* true for touchpads */
  63. };
  64. struct mt_fields {
  65. unsigned usages[HID_MAX_FIELDS];
  66. unsigned int length;
  67. };
  68. struct mt_device {
  69. struct mt_slot curdata; /* placeholder of incoming data */
  70. struct mt_class mtclass; /* our mt device class */
  71. struct mt_fields *fields; /* temporary placeholder for storing the
  72. multitouch fields */
  73. unsigned last_field_index; /* last field index of the report */
  74. unsigned last_slot_field; /* the last field of a slot */
  75. __s8 inputmode; /* InputMode HID feature, -1 if non-existent */
  76. __s8 maxcontact_report_id; /* Maximum Contact Number HID feature,
  77. -1 if non-existent */
  78. __u8 num_received; /* how many contacts we received */
  79. __u8 num_expected; /* expected last contact index */
  80. __u8 maxcontacts;
  81. __u8 touches_by_report; /* how many touches are present in one report:
  82. * 1 means we should use a serial protocol
  83. * > 1 means hybrid (multitouch) protocol */
  84. bool curvalid; /* is the current contact valid? */
  85. struct mt_slot *slots;
  86. };
  87. /* classes of device behavior */
  88. #define MT_CLS_DEFAULT 0x0001
  89. #define MT_CLS_SERIAL 0x0002
  90. #define MT_CLS_CONFIDENCE 0x0003
  91. #define MT_CLS_CONFIDENCE_CONTACT_ID 0x0004
  92. #define MT_CLS_CONFIDENCE_MINUS_ONE 0x0005
  93. #define MT_CLS_DUAL_INRANGE_CONTACTID 0x0006
  94. #define MT_CLS_DUAL_INRANGE_CONTACTNUMBER 0x0007
  95. #define MT_CLS_DUAL_NSMU_CONTACTID 0x0008
  96. #define MT_CLS_INRANGE_CONTACTNUMBER 0x0009
  97. /* vendor specific classes */
  98. #define MT_CLS_3M 0x0101
  99. #define MT_CLS_CYPRESS 0x0102
  100. #define MT_CLS_EGALAX 0x0103
  101. #define MT_CLS_EGALAX_SERIAL 0x0104
  102. #define MT_CLS_TOPSEED 0x0105
  103. #define MT_CLS_PANASONIC 0x0106
  104. #define MT_DEFAULT_MAXCONTACT 10
  105. #define MT_USB_DEVICE(v, p) HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH, v, p)
  106. #define MT_BT_DEVICE(v, p) HID_DEVICE(BUS_BLUETOOTH, HID_GROUP_MULTITOUCH, v, p)
  107. /*
  108. * these device-dependent functions determine what slot corresponds
  109. * to a valid contact that was just read.
  110. */
  111. static int cypress_compute_slot(struct mt_device *td)
  112. {
  113. if (td->curdata.contactid != 0 || td->num_received == 0)
  114. return td->curdata.contactid;
  115. else
  116. return -1;
  117. }
  118. static int find_slot_from_contactid(struct mt_device *td)
  119. {
  120. int i;
  121. for (i = 0; i < td->maxcontacts; ++i) {
  122. if (td->slots[i].contactid == td->curdata.contactid &&
  123. td->slots[i].touch_state)
  124. return i;
  125. }
  126. for (i = 0; i < td->maxcontacts; ++i) {
  127. if (!td->slots[i].seen_in_this_frame &&
  128. !td->slots[i].touch_state)
  129. return i;
  130. }
  131. /* should not occurs. If this happens that means
  132. * that the device sent more touches that it says
  133. * in the report descriptor. It is ignored then. */
  134. return -1;
  135. }
  136. static struct mt_class mt_classes[] = {
  137. { .name = MT_CLS_DEFAULT,
  138. .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP },
  139. { .name = MT_CLS_SERIAL,
  140. .quirks = MT_QUIRK_ALWAYS_VALID},
  141. { .name = MT_CLS_CONFIDENCE,
  142. .quirks = MT_QUIRK_VALID_IS_CONFIDENCE },
  143. { .name = MT_CLS_CONFIDENCE_CONTACT_ID,
  144. .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
  145. MT_QUIRK_SLOT_IS_CONTACTID },
  146. { .name = MT_CLS_CONFIDENCE_MINUS_ONE,
  147. .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
  148. MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE },
  149. { .name = MT_CLS_DUAL_INRANGE_CONTACTID,
  150. .quirks = MT_QUIRK_VALID_IS_INRANGE |
  151. MT_QUIRK_SLOT_IS_CONTACTID,
  152. .maxcontacts = 2 },
  153. { .name = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
  154. .quirks = MT_QUIRK_VALID_IS_INRANGE |
  155. MT_QUIRK_SLOT_IS_CONTACTNUMBER,
  156. .maxcontacts = 2 },
  157. { .name = MT_CLS_DUAL_NSMU_CONTACTID,
  158. .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
  159. MT_QUIRK_SLOT_IS_CONTACTID,
  160. .maxcontacts = 2 },
  161. { .name = MT_CLS_INRANGE_CONTACTNUMBER,
  162. .quirks = MT_QUIRK_VALID_IS_INRANGE |
  163. MT_QUIRK_SLOT_IS_CONTACTNUMBER },
  164. /*
  165. * vendor specific classes
  166. */
  167. { .name = MT_CLS_3M,
  168. .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
  169. MT_QUIRK_SLOT_IS_CONTACTID,
  170. .sn_move = 2048,
  171. .sn_width = 128,
  172. .sn_height = 128 },
  173. { .name = MT_CLS_CYPRESS,
  174. .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
  175. MT_QUIRK_CYPRESS,
  176. .maxcontacts = 10 },
  177. { .name = MT_CLS_EGALAX,
  178. .quirks = MT_QUIRK_SLOT_IS_CONTACTID |
  179. MT_QUIRK_VALID_IS_INRANGE,
  180. .sn_move = 4096,
  181. .sn_pressure = 32,
  182. },
  183. { .name = MT_CLS_EGALAX_SERIAL,
  184. .quirks = MT_QUIRK_SLOT_IS_CONTACTID |
  185. MT_QUIRK_ALWAYS_VALID,
  186. .sn_move = 4096,
  187. .sn_pressure = 32,
  188. },
  189. { .name = MT_CLS_TOPSEED,
  190. .quirks = MT_QUIRK_ALWAYS_VALID,
  191. .is_indirect = true,
  192. .maxcontacts = 2,
  193. },
  194. { .name = MT_CLS_PANASONIC,
  195. .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP,
  196. .maxcontacts = 4 },
  197. { }
  198. };
  199. static ssize_t mt_show_quirks(struct device *dev,
  200. struct device_attribute *attr,
  201. char *buf)
  202. {
  203. struct hid_device *hdev = container_of(dev, struct hid_device, dev);
  204. struct mt_device *td = hid_get_drvdata(hdev);
  205. return sprintf(buf, "%u\n", td->mtclass.quirks);
  206. }
  207. static ssize_t mt_set_quirks(struct device *dev,
  208. struct device_attribute *attr,
  209. const char *buf, size_t count)
  210. {
  211. struct hid_device *hdev = container_of(dev, struct hid_device, dev);
  212. struct mt_device *td = hid_get_drvdata(hdev);
  213. unsigned long val;
  214. if (kstrtoul(buf, 0, &val))
  215. return -EINVAL;
  216. td->mtclass.quirks = val;
  217. return count;
  218. }
  219. static DEVICE_ATTR(quirks, S_IWUSR | S_IRUGO, mt_show_quirks, mt_set_quirks);
  220. static struct attribute *sysfs_attrs[] = {
  221. &dev_attr_quirks.attr,
  222. NULL
  223. };
  224. static struct attribute_group mt_attribute_group = {
  225. .attrs = sysfs_attrs
  226. };
  227. static void mt_feature_mapping(struct hid_device *hdev,
  228. struct hid_field *field, struct hid_usage *usage)
  229. {
  230. struct mt_device *td = hid_get_drvdata(hdev);
  231. switch (usage->hid) {
  232. case HID_DG_INPUTMODE:
  233. td->inputmode = field->report->id;
  234. break;
  235. case HID_DG_CONTACTMAX:
  236. td->maxcontact_report_id = field->report->id;
  237. td->maxcontacts = field->value[0];
  238. if (td->mtclass.maxcontacts)
  239. /* check if the maxcontacts is given by the class */
  240. td->maxcontacts = td->mtclass.maxcontacts;
  241. break;
  242. }
  243. }
  244. static void set_abs(struct input_dev *input, unsigned int code,
  245. struct hid_field *field, int snratio)
  246. {
  247. int fmin = field->logical_minimum;
  248. int fmax = field->logical_maximum;
  249. int fuzz = snratio ? (fmax - fmin) / snratio : 0;
  250. input_set_abs_params(input, code, fmin, fmax, fuzz, 0);
  251. }
  252. static void mt_store_field(struct hid_usage *usage, struct mt_device *td,
  253. struct hid_input *hi)
  254. {
  255. struct mt_fields *f = td->fields;
  256. if (f->length >= HID_MAX_FIELDS)
  257. return;
  258. f->usages[f->length++] = usage->hid;
  259. }
  260. static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi,
  261. struct hid_field *field, struct hid_usage *usage,
  262. unsigned long **bit, int *max)
  263. {
  264. struct mt_device *td = hid_get_drvdata(hdev);
  265. struct mt_class *cls = &td->mtclass;
  266. int code;
  267. /* Only map fields from TouchScreen or TouchPad collections.
  268. * We need to ignore fields that belong to other collections
  269. * such as Mouse that might have the same GenericDesktop usages. */
  270. if (field->application == HID_DG_TOUCHSCREEN)
  271. set_bit(INPUT_PROP_DIRECT, hi->input->propbit);
  272. else if (field->application != HID_DG_TOUCHPAD)
  273. return 0;
  274. /* In case of an indirect device (touchpad), we need to add
  275. * specific BTN_TOOL_* to be handled by the synaptics xorg
  276. * driver.
  277. * We also consider that touchscreens providing buttons are touchpads.
  278. */
  279. if (field->application == HID_DG_TOUCHPAD ||
  280. (usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON ||
  281. cls->is_indirect) {
  282. set_bit(INPUT_PROP_POINTER, hi->input->propbit);
  283. set_bit(BTN_TOOL_FINGER, hi->input->keybit);
  284. set_bit(BTN_TOOL_DOUBLETAP, hi->input->keybit);
  285. set_bit(BTN_TOOL_TRIPLETAP, hi->input->keybit);
  286. set_bit(BTN_TOOL_QUADTAP, hi->input->keybit);
  287. }
  288. /* eGalax devices provide a Digitizer.Stylus input which overrides
  289. * the correct Digitizers.Finger X/Y ranges.
  290. * Let's just ignore this input. */
  291. if (field->physical == HID_DG_STYLUS)
  292. return -1;
  293. switch (usage->hid & HID_USAGE_PAGE) {
  294. case HID_UP_GENDESK:
  295. switch (usage->hid) {
  296. case HID_GD_X:
  297. hid_map_usage(hi, usage, bit, max,
  298. EV_ABS, ABS_MT_POSITION_X);
  299. set_abs(hi->input, ABS_MT_POSITION_X, field,
  300. cls->sn_move);
  301. /* touchscreen emulation */
  302. set_abs(hi->input, ABS_X, field, cls->sn_move);
  303. mt_store_field(usage, td, hi);
  304. td->last_field_index = field->index;
  305. return 1;
  306. case HID_GD_Y:
  307. hid_map_usage(hi, usage, bit, max,
  308. EV_ABS, ABS_MT_POSITION_Y);
  309. set_abs(hi->input, ABS_MT_POSITION_Y, field,
  310. cls->sn_move);
  311. /* touchscreen emulation */
  312. set_abs(hi->input, ABS_Y, field, cls->sn_move);
  313. mt_store_field(usage, td, hi);
  314. td->last_field_index = field->index;
  315. return 1;
  316. }
  317. return 0;
  318. case HID_UP_DIGITIZER:
  319. switch (usage->hid) {
  320. case HID_DG_INRANGE:
  321. mt_store_field(usage, td, hi);
  322. td->last_field_index = field->index;
  323. return 1;
  324. case HID_DG_CONFIDENCE:
  325. mt_store_field(usage, td, hi);
  326. td->last_field_index = field->index;
  327. return 1;
  328. case HID_DG_TIPSWITCH:
  329. hid_map_usage(hi, usage, bit, max, EV_KEY, BTN_TOUCH);
  330. input_set_capability(hi->input, EV_KEY, BTN_TOUCH);
  331. mt_store_field(usage, td, hi);
  332. td->last_field_index = field->index;
  333. return 1;
  334. case HID_DG_CONTACTID:
  335. if (!td->maxcontacts)
  336. td->maxcontacts = MT_DEFAULT_MAXCONTACT;
  337. input_mt_init_slots(hi->input, td->maxcontacts);
  338. mt_store_field(usage, td, hi);
  339. td->last_field_index = field->index;
  340. td->touches_by_report++;
  341. return 1;
  342. case HID_DG_WIDTH:
  343. hid_map_usage(hi, usage, bit, max,
  344. EV_ABS, ABS_MT_TOUCH_MAJOR);
  345. set_abs(hi->input, ABS_MT_TOUCH_MAJOR, field,
  346. cls->sn_width);
  347. mt_store_field(usage, td, hi);
  348. td->last_field_index = field->index;
  349. return 1;
  350. case HID_DG_HEIGHT:
  351. hid_map_usage(hi, usage, bit, max,
  352. EV_ABS, ABS_MT_TOUCH_MINOR);
  353. set_abs(hi->input, ABS_MT_TOUCH_MINOR, field,
  354. cls->sn_height);
  355. input_set_abs_params(hi->input,
  356. ABS_MT_ORIENTATION, 0, 1, 0, 0);
  357. mt_store_field(usage, td, hi);
  358. td->last_field_index = field->index;
  359. return 1;
  360. case HID_DG_TIPPRESSURE:
  361. hid_map_usage(hi, usage, bit, max,
  362. EV_ABS, ABS_MT_PRESSURE);
  363. set_abs(hi->input, ABS_MT_PRESSURE, field,
  364. cls->sn_pressure);
  365. /* touchscreen emulation */
  366. set_abs(hi->input, ABS_PRESSURE, field,
  367. cls->sn_pressure);
  368. mt_store_field(usage, td, hi);
  369. td->last_field_index = field->index;
  370. return 1;
  371. case HID_DG_CONTACTCOUNT:
  372. td->last_field_index = field->index;
  373. return 1;
  374. case HID_DG_CONTACTMAX:
  375. /* we don't set td->last_slot_field as contactcount and
  376. * contact max are global to the report */
  377. td->last_field_index = field->index;
  378. return -1;
  379. }
  380. case HID_DG_TOUCH:
  381. /* Legacy devices use TIPSWITCH and not TOUCH.
  382. * Let's just ignore this field. */
  383. return -1;
  384. /* let hid-input decide for the others */
  385. return 0;
  386. case HID_UP_BUTTON:
  387. code = BTN_MOUSE + ((usage->hid - 1) & HID_USAGE);
  388. hid_map_usage(hi, usage, bit, max, EV_KEY, code);
  389. input_set_capability(hi->input, EV_KEY, code);
  390. return 1;
  391. case 0xff000000:
  392. /* we do not want to map these: no input-oriented meaning */
  393. return -1;
  394. }
  395. return 0;
  396. }
  397. static int mt_input_mapped(struct hid_device *hdev, struct hid_input *hi,
  398. struct hid_field *field, struct hid_usage *usage,
  399. unsigned long **bit, int *max)
  400. {
  401. if (usage->type == EV_KEY || usage->type == EV_ABS)
  402. set_bit(usage->type, hi->input->evbit);
  403. return -1;
  404. }
  405. static int mt_compute_slot(struct mt_device *td)
  406. {
  407. __s32 quirks = td->mtclass.quirks;
  408. if (quirks & MT_QUIRK_SLOT_IS_CONTACTID)
  409. return td->curdata.contactid;
  410. if (quirks & MT_QUIRK_CYPRESS)
  411. return cypress_compute_slot(td);
  412. if (quirks & MT_QUIRK_SLOT_IS_CONTACTNUMBER)
  413. return td->num_received;
  414. if (quirks & MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE)
  415. return td->curdata.contactid - 1;
  416. return find_slot_from_contactid(td);
  417. }
  418. /*
  419. * this function is called when a whole contact has been processed,
  420. * so that it can assign it to a slot and store the data there
  421. */
  422. static void mt_complete_slot(struct mt_device *td)
  423. {
  424. td->curdata.seen_in_this_frame = true;
  425. if (td->curvalid) {
  426. int slotnum = mt_compute_slot(td);
  427. if (slotnum >= 0 && slotnum < td->maxcontacts)
  428. td->slots[slotnum] = td->curdata;
  429. }
  430. td->num_received++;
  431. }
  432. /*
  433. * this function is called when a whole packet has been received and processed,
  434. * so that it can decide what to send to the input layer.
  435. */
  436. static void mt_emit_event(struct mt_device *td, struct input_dev *input)
  437. {
  438. int i;
  439. for (i = 0; i < td->maxcontacts; ++i) {
  440. struct mt_slot *s = &(td->slots[i]);
  441. if ((td->mtclass.quirks & MT_QUIRK_NOT_SEEN_MEANS_UP) &&
  442. !s->seen_in_this_frame) {
  443. s->touch_state = false;
  444. }
  445. input_mt_slot(input, i);
  446. input_mt_report_slot_state(input, MT_TOOL_FINGER,
  447. s->touch_state);
  448. if (s->touch_state) {
  449. /* this finger is on the screen */
  450. int wide = (s->w > s->h);
  451. /* divided by two to match visual scale of touch */
  452. int major = max(s->w, s->h) >> 1;
  453. int minor = min(s->w, s->h) >> 1;
  454. input_event(input, EV_ABS, ABS_MT_POSITION_X, s->x);
  455. input_event(input, EV_ABS, ABS_MT_POSITION_Y, s->y);
  456. input_event(input, EV_ABS, ABS_MT_ORIENTATION, wide);
  457. input_event(input, EV_ABS, ABS_MT_PRESSURE, s->p);
  458. input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
  459. input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);
  460. }
  461. s->seen_in_this_frame = false;
  462. }
  463. input_mt_report_pointer_emulation(input, true);
  464. input_sync(input);
  465. td->num_received = 0;
  466. }
  467. static int mt_event(struct hid_device *hid, struct hid_field *field,
  468. struct hid_usage *usage, __s32 value)
  469. {
  470. struct mt_device *td = hid_get_drvdata(hid);
  471. __s32 quirks = td->mtclass.quirks;
  472. if (hid->claimed & HID_CLAIMED_INPUT && td->slots) {
  473. switch (usage->hid) {
  474. case HID_DG_INRANGE:
  475. if (quirks & MT_QUIRK_ALWAYS_VALID)
  476. td->curvalid = true;
  477. else if (quirks & MT_QUIRK_VALID_IS_INRANGE)
  478. td->curvalid = value;
  479. break;
  480. case HID_DG_TIPSWITCH:
  481. if (quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
  482. td->curvalid = value;
  483. td->curdata.touch_state = value;
  484. break;
  485. case HID_DG_CONFIDENCE:
  486. if (quirks & MT_QUIRK_VALID_IS_CONFIDENCE)
  487. td->curvalid = value;
  488. break;
  489. case HID_DG_CONTACTID:
  490. td->curdata.contactid = value;
  491. break;
  492. case HID_DG_TIPPRESSURE:
  493. td->curdata.p = value;
  494. break;
  495. case HID_GD_X:
  496. td->curdata.x = value;
  497. break;
  498. case HID_GD_Y:
  499. td->curdata.y = value;
  500. break;
  501. case HID_DG_WIDTH:
  502. td->curdata.w = value;
  503. break;
  504. case HID_DG_HEIGHT:
  505. td->curdata.h = value;
  506. break;
  507. case HID_DG_CONTACTCOUNT:
  508. /*
  509. * Includes multi-packet support where subsequent
  510. * packets are sent with zero contactcount.
  511. */
  512. if (value)
  513. td->num_expected = value;
  514. break;
  515. case HID_DG_TOUCH:
  516. /* do nothing */
  517. break;
  518. default:
  519. /* fallback to the generic hidinput handling */
  520. return 0;
  521. }
  522. if (usage->hid == td->last_slot_field)
  523. mt_complete_slot(td);
  524. if (field->index == td->last_field_index
  525. && td->num_received >= td->num_expected)
  526. mt_emit_event(td, field->hidinput->input);
  527. }
  528. /* we have handled the hidinput part, now remains hiddev */
  529. if (hid->claimed & HID_CLAIMED_HIDDEV && hid->hiddev_hid_event)
  530. hid->hiddev_hid_event(hid, field, usage, value);
  531. return 1;
  532. }
  533. static void mt_set_input_mode(struct hid_device *hdev)
  534. {
  535. struct mt_device *td = hid_get_drvdata(hdev);
  536. struct hid_report *r;
  537. struct hid_report_enum *re;
  538. if (td->inputmode < 0)
  539. return;
  540. re = &(hdev->report_enum[HID_FEATURE_REPORT]);
  541. r = re->report_id_hash[td->inputmode];
  542. if (r) {
  543. r->field[0]->value[0] = 0x02;
  544. usbhid_submit_report(hdev, r, USB_DIR_OUT);
  545. }
  546. }
  547. static void mt_set_maxcontacts(struct hid_device *hdev)
  548. {
  549. struct mt_device *td = hid_get_drvdata(hdev);
  550. struct hid_report *r;
  551. struct hid_report_enum *re;
  552. int fieldmax, max;
  553. if (td->maxcontact_report_id < 0)
  554. return;
  555. if (!td->mtclass.maxcontacts)
  556. return;
  557. re = &hdev->report_enum[HID_FEATURE_REPORT];
  558. r = re->report_id_hash[td->maxcontact_report_id];
  559. if (r) {
  560. max = td->mtclass.maxcontacts;
  561. fieldmax = r->field[0]->logical_maximum;
  562. max = min(fieldmax, max);
  563. if (r->field[0]->value[0] != max) {
  564. r->field[0]->value[0] = max;
  565. usbhid_submit_report(hdev, r, USB_DIR_OUT);
  566. }
  567. }
  568. }
  569. static void mt_post_parse_default_settings(struct mt_device *td)
  570. {
  571. __s32 quirks = td->mtclass.quirks;
  572. /* unknown serial device needs special quirks */
  573. if (td->touches_by_report == 1) {
  574. quirks |= MT_QUIRK_ALWAYS_VALID;
  575. quirks &= ~MT_QUIRK_NOT_SEEN_MEANS_UP;
  576. quirks &= ~MT_QUIRK_VALID_IS_INRANGE;
  577. quirks &= ~MT_QUIRK_VALID_IS_CONFIDENCE;
  578. }
  579. td->mtclass.quirks = quirks;
  580. }
  581. static void mt_post_parse(struct mt_device *td)
  582. {
  583. struct mt_fields *f = td->fields;
  584. if (td->touches_by_report > 0) {
  585. int field_count_per_touch = f->length / td->touches_by_report;
  586. td->last_slot_field = f->usages[field_count_per_touch - 1];
  587. }
  588. }
  589. static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
  590. {
  591. int ret, i;
  592. struct mt_device *td;
  593. struct mt_class *mtclass = mt_classes; /* MT_CLS_DEFAULT */
  594. if (id) {
  595. for (i = 0; mt_classes[i].name ; i++) {
  596. if (id->driver_data == mt_classes[i].name) {
  597. mtclass = &(mt_classes[i]);
  598. break;
  599. }
  600. }
  601. }
  602. /* This allows the driver to correctly support devices
  603. * that emit events over several HID messages.
  604. */
  605. hdev->quirks |= HID_QUIRK_NO_INPUT_SYNC;
  606. td = kzalloc(sizeof(struct mt_device), GFP_KERNEL);
  607. if (!td) {
  608. dev_err(&hdev->dev, "cannot allocate multitouch data\n");
  609. return -ENOMEM;
  610. }
  611. td->mtclass = *mtclass;
  612. td->inputmode = -1;
  613. td->maxcontact_report_id = -1;
  614. hid_set_drvdata(hdev, td);
  615. td->fields = kzalloc(sizeof(struct mt_fields), GFP_KERNEL);
  616. if (!td->fields) {
  617. dev_err(&hdev->dev, "cannot allocate multitouch fields data\n");
  618. ret = -ENOMEM;
  619. goto fail;
  620. }
  621. ret = hid_parse(hdev);
  622. if (ret != 0)
  623. goto fail;
  624. ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
  625. if (ret)
  626. goto fail;
  627. mt_post_parse(td);
  628. if (id->vendor == HID_ANY_ID && id->product == HID_ANY_ID)
  629. mt_post_parse_default_settings(td);
  630. td->slots = kzalloc(td->maxcontacts * sizeof(struct mt_slot),
  631. GFP_KERNEL);
  632. if (!td->slots) {
  633. dev_err(&hdev->dev, "cannot allocate multitouch slots\n");
  634. hid_hw_stop(hdev);
  635. ret = -ENOMEM;
  636. goto fail;
  637. }
  638. ret = sysfs_create_group(&hdev->dev.kobj, &mt_attribute_group);
  639. mt_set_maxcontacts(hdev);
  640. mt_set_input_mode(hdev);
  641. kfree(td->fields);
  642. td->fields = NULL;
  643. return 0;
  644. fail:
  645. kfree(td->fields);
  646. kfree(td);
  647. return ret;
  648. }
  649. #ifdef CONFIG_PM
  650. static int mt_reset_resume(struct hid_device *hdev)
  651. {
  652. mt_set_maxcontacts(hdev);
  653. mt_set_input_mode(hdev);
  654. return 0;
  655. }
  656. #endif
  657. static void mt_remove(struct hid_device *hdev)
  658. {
  659. struct mt_device *td = hid_get_drvdata(hdev);
  660. sysfs_remove_group(&hdev->dev.kobj, &mt_attribute_group);
  661. hid_hw_stop(hdev);
  662. kfree(td->slots);
  663. kfree(td);
  664. hid_set_drvdata(hdev, NULL);
  665. }
  666. static const struct hid_device_id mt_devices[] = {
  667. /* 3M panels */
  668. { .driver_data = MT_CLS_3M,
  669. MT_USB_DEVICE(USB_VENDOR_ID_3M,
  670. USB_DEVICE_ID_3M1968) },
  671. { .driver_data = MT_CLS_3M,
  672. MT_USB_DEVICE(USB_VENDOR_ID_3M,
  673. USB_DEVICE_ID_3M2256) },
  674. { .driver_data = MT_CLS_3M,
  675. MT_USB_DEVICE(USB_VENDOR_ID_3M,
  676. USB_DEVICE_ID_3M3266) },
  677. /* ActionStar panels */
  678. { .driver_data = MT_CLS_DEFAULT,
  679. MT_USB_DEVICE(USB_VENDOR_ID_ACTIONSTAR,
  680. USB_DEVICE_ID_ACTIONSTAR_1011) },
  681. /* Atmel panels */
  682. { .driver_data = MT_CLS_SERIAL,
  683. MT_USB_DEVICE(USB_VENDOR_ID_ATMEL,
  684. USB_DEVICE_ID_ATMEL_MULTITOUCH) },
  685. { .driver_data = MT_CLS_SERIAL,
  686. MT_USB_DEVICE(USB_VENDOR_ID_ATMEL,
  687. USB_DEVICE_ID_ATMEL_MXT_DIGITIZER) },
  688. /* Baanto multitouch devices */
  689. { .driver_data = MT_CLS_DEFAULT,
  690. MT_USB_DEVICE(USB_VENDOR_ID_BAANTO,
  691. USB_DEVICE_ID_BAANTO_MT_190W2) },
  692. /* Cando panels */
  693. { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
  694. MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
  695. USB_DEVICE_ID_CANDO_MULTI_TOUCH) },
  696. { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
  697. MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
  698. USB_DEVICE_ID_CANDO_MULTI_TOUCH_10_1) },
  699. { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
  700. MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
  701. USB_DEVICE_ID_CANDO_MULTI_TOUCH_11_6) },
  702. { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
  703. MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
  704. USB_DEVICE_ID_CANDO_MULTI_TOUCH_15_6) },
  705. /* Chunghwa Telecom touch panels */
  706. { .driver_data = MT_CLS_DEFAULT,
  707. MT_USB_DEVICE(USB_VENDOR_ID_CHUNGHWAT,
  708. USB_DEVICE_ID_CHUNGHWAT_MULTITOUCH) },
  709. /* CVTouch panels */
  710. { .driver_data = MT_CLS_DEFAULT,
  711. MT_USB_DEVICE(USB_VENDOR_ID_CVTOUCH,
  712. USB_DEVICE_ID_CVTOUCH_SCREEN) },
  713. /* Cypress panel */
  714. { .driver_data = MT_CLS_CYPRESS,
  715. HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS,
  716. USB_DEVICE_ID_CYPRESS_TRUETOUCH) },
  717. /* eGalax devices (resistive) */
  718. { .driver_data = MT_CLS_EGALAX,
  719. MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
  720. USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480D) },
  721. { .driver_data = MT_CLS_EGALAX,
  722. MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
  723. USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480E) },
  724. /* eGalax devices (capacitive) */
  725. { .driver_data = MT_CLS_EGALAX,
  726. MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
  727. USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_720C) },
  728. { .driver_data = MT_CLS_EGALAX_SERIAL,
  729. MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
  730. USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7207) },
  731. { .driver_data = MT_CLS_EGALAX_SERIAL,
  732. MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
  733. USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_725E) },
  734. { .driver_data = MT_CLS_EGALAX_SERIAL,
  735. MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
  736. USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7224) },
  737. { .driver_data = MT_CLS_EGALAX_SERIAL,
  738. MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
  739. USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_722A) },
  740. { .driver_data = MT_CLS_EGALAX,
  741. MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
  742. USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_726B) },
  743. { .driver_data = MT_CLS_EGALAX_SERIAL,
  744. MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
  745. USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7262) },
  746. { .driver_data = MT_CLS_EGALAX,
  747. MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
  748. USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72A1) },
  749. { .driver_data = MT_CLS_EGALAX_SERIAL,
  750. MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
  751. USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72AA) },
  752. { .driver_data = MT_CLS_EGALAX,
  753. MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
  754. USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72FA) },
  755. { .driver_data = MT_CLS_EGALAX,
  756. MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
  757. USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7302) },
  758. { .driver_data = MT_CLS_EGALAX_SERIAL,
  759. MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
  760. USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7349) },
  761. { .driver_data = MT_CLS_EGALAX_SERIAL,
  762. MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
  763. USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_A001) },
  764. /* Elo TouchSystems IntelliTouch Plus panel */
  765. { .driver_data = MT_CLS_DUAL_NSMU_CONTACTID,
  766. MT_USB_DEVICE(USB_VENDOR_ID_ELO,
  767. USB_DEVICE_ID_ELO_TS2515) },
  768. /* GeneralTouch panel */
  769. { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
  770. MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
  771. USB_DEVICE_ID_GENERAL_TOUCH_WIN7_TWOFINGERS) },
  772. /* Gametel game controller */
  773. { .driver_data = MT_CLS_DEFAULT,
  774. MT_BT_DEVICE(USB_VENDOR_ID_FRUCTEL,
  775. USB_DEVICE_ID_GAMETEL_MT_MODE) },
  776. /* GoodTouch panels */
  777. { .driver_data = MT_CLS_DEFAULT,
  778. MT_USB_DEVICE(USB_VENDOR_ID_GOODTOUCH,
  779. USB_DEVICE_ID_GOODTOUCH_000f) },
  780. /* Hanvon panels */
  781. { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
  782. MT_USB_DEVICE(USB_VENDOR_ID_HANVON_ALT,
  783. USB_DEVICE_ID_HANVON_ALT_MULTITOUCH) },
  784. /* Ideacom panel */
  785. { .driver_data = MT_CLS_SERIAL,
  786. MT_USB_DEVICE(USB_VENDOR_ID_IDEACOM,
  787. USB_DEVICE_ID_IDEACOM_IDC6650) },
  788. { .driver_data = MT_CLS_SERIAL,
  789. MT_USB_DEVICE(USB_VENDOR_ID_IDEACOM,
  790. USB_DEVICE_ID_IDEACOM_IDC6651) },
  791. /* Ilitek dual touch panel */
  792. { .driver_data = MT_CLS_DEFAULT,
  793. MT_USB_DEVICE(USB_VENDOR_ID_ILITEK,
  794. USB_DEVICE_ID_ILITEK_MULTITOUCH) },
  795. /* IRTOUCH panels */
  796. { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
  797. MT_USB_DEVICE(USB_VENDOR_ID_IRTOUCHSYSTEMS,
  798. USB_DEVICE_ID_IRTOUCH_INFRARED_USB) },
  799. /* LG Display panels */
  800. { .driver_data = MT_CLS_DEFAULT,
  801. MT_USB_DEVICE(USB_VENDOR_ID_LG,
  802. USB_DEVICE_ID_LG_MULTITOUCH) },
  803. /* Lumio panels */
  804. { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
  805. MT_USB_DEVICE(USB_VENDOR_ID_LUMIO,
  806. USB_DEVICE_ID_CRYSTALTOUCH) },
  807. { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
  808. MT_USB_DEVICE(USB_VENDOR_ID_LUMIO,
  809. USB_DEVICE_ID_CRYSTALTOUCH_DUAL) },
  810. /* MosArt panels */
  811. { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
  812. MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
  813. USB_DEVICE_ID_ASUS_T91MT)},
  814. { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
  815. MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
  816. USB_DEVICE_ID_ASUSTEK_MULTITOUCH_YFO) },
  817. { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
  818. MT_USB_DEVICE(USB_VENDOR_ID_TURBOX,
  819. USB_DEVICE_ID_TURBOX_TOUCHSCREEN_MOSART) },
  820. /* Panasonic panels */
  821. { .driver_data = MT_CLS_PANASONIC,
  822. MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
  823. USB_DEVICE_ID_PANABOARD_UBT780) },
  824. { .driver_data = MT_CLS_PANASONIC,
  825. MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
  826. USB_DEVICE_ID_PANABOARD_UBT880) },
  827. /* PenMount panels */
  828. { .driver_data = MT_CLS_CONFIDENCE,
  829. MT_USB_DEVICE(USB_VENDOR_ID_PENMOUNT,
  830. USB_DEVICE_ID_PENMOUNT_PCI) },
  831. /* PixArt optical touch screen */
  832. { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
  833. MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
  834. USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN) },
  835. { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
  836. MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
  837. USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN1) },
  838. { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
  839. MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
  840. USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN2) },
  841. /* PixCir-based panels */
  842. { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
  843. MT_USB_DEVICE(USB_VENDOR_ID_HANVON,
  844. USB_DEVICE_ID_HANVON_MULTITOUCH) },
  845. { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
  846. MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
  847. USB_DEVICE_ID_CANDO_PIXCIR_MULTI_TOUCH) },
  848. /* Quanta-based panels */
  849. { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
  850. MT_USB_DEVICE(USB_VENDOR_ID_QUANTA,
  851. USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH) },
  852. { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
  853. MT_USB_DEVICE(USB_VENDOR_ID_QUANTA,
  854. USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3001) },
  855. { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
  856. MT_USB_DEVICE(USB_VENDOR_ID_QUANTA,
  857. USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3008) },
  858. /* Stantum panels */
  859. { .driver_data = MT_CLS_CONFIDENCE,
  860. MT_USB_DEVICE(USB_VENDOR_ID_STANTUM,
  861. USB_DEVICE_ID_MTP)},
  862. { .driver_data = MT_CLS_CONFIDENCE,
  863. MT_USB_DEVICE(USB_VENDOR_ID_STANTUM_STM,
  864. USB_DEVICE_ID_MTP_STM)},
  865. { .driver_data = MT_CLS_CONFIDENCE,
  866. MT_USB_DEVICE(USB_VENDOR_ID_STANTUM_SITRONIX,
  867. USB_DEVICE_ID_MTP_SITRONIX)},
  868. /* TopSeed panels */
  869. { .driver_data = MT_CLS_TOPSEED,
  870. MT_USB_DEVICE(USB_VENDOR_ID_TOPSEED2,
  871. USB_DEVICE_ID_TOPSEED2_PERIPAD_701) },
  872. /* Touch International panels */
  873. { .driver_data = MT_CLS_DEFAULT,
  874. MT_USB_DEVICE(USB_VENDOR_ID_TOUCH_INTL,
  875. USB_DEVICE_ID_TOUCH_INTL_MULTI_TOUCH) },
  876. /* Unitec panels */
  877. { .driver_data = MT_CLS_DEFAULT,
  878. MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
  879. USB_DEVICE_ID_UNITEC_USB_TOUCH_0709) },
  880. { .driver_data = MT_CLS_DEFAULT,
  881. MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
  882. USB_DEVICE_ID_UNITEC_USB_TOUCH_0A19) },
  883. /* XAT */
  884. { .driver_data = MT_CLS_DEFAULT,
  885. MT_USB_DEVICE(USB_VENDOR_ID_XAT,
  886. USB_DEVICE_ID_XAT_CSR) },
  887. /* Xiroku */
  888. { .driver_data = MT_CLS_DEFAULT,
  889. MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
  890. USB_DEVICE_ID_XIROKU_SPX) },
  891. { .driver_data = MT_CLS_DEFAULT,
  892. MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
  893. USB_DEVICE_ID_XIROKU_MPX) },
  894. { .driver_data = MT_CLS_DEFAULT,
  895. MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
  896. USB_DEVICE_ID_XIROKU_CSR) },
  897. { .driver_data = MT_CLS_DEFAULT,
  898. MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
  899. USB_DEVICE_ID_XIROKU_SPX1) },
  900. { .driver_data = MT_CLS_DEFAULT,
  901. MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
  902. USB_DEVICE_ID_XIROKU_MPX1) },
  903. { .driver_data = MT_CLS_DEFAULT,
  904. MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
  905. USB_DEVICE_ID_XIROKU_CSR1) },
  906. { .driver_data = MT_CLS_DEFAULT,
  907. MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
  908. USB_DEVICE_ID_XIROKU_SPX2) },
  909. { .driver_data = MT_CLS_DEFAULT,
  910. MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
  911. USB_DEVICE_ID_XIROKU_MPX2) },
  912. { .driver_data = MT_CLS_DEFAULT,
  913. MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
  914. USB_DEVICE_ID_XIROKU_CSR2) },
  915. /* Generic MT device */
  916. { HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH, HID_ANY_ID, HID_ANY_ID) },
  917. { }
  918. };
  919. MODULE_DEVICE_TABLE(hid, mt_devices);
  920. static const struct hid_usage_id mt_grabbed_usages[] = {
  921. { HID_ANY_ID, HID_ANY_ID, HID_ANY_ID },
  922. { HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1}
  923. };
  924. static struct hid_driver mt_driver = {
  925. .name = "hid-multitouch",
  926. .id_table = mt_devices,
  927. .probe = mt_probe,
  928. .remove = mt_remove,
  929. .input_mapping = mt_input_mapping,
  930. .input_mapped = mt_input_mapped,
  931. .feature_mapping = mt_feature_mapping,
  932. .usage_table = mt_grabbed_usages,
  933. .event = mt_event,
  934. #ifdef CONFIG_PM
  935. .reset_resume = mt_reset_resume,
  936. #endif
  937. };
  938. static int __init mt_init(void)
  939. {
  940. return hid_register_driver(&mt_driver);
  941. }
  942. static void __exit mt_exit(void)
  943. {
  944. hid_unregister_driver(&mt_driver);
  945. }
  946. module_init(mt_init);
  947. module_exit(mt_exit);