1 /*
2 * HID driver for Asus notebook built-in keyboard.
3 * Fixes small logical maximum to match usage maximum.
4 *
5 * Currently supported devices are:
6 * EeeBook X205TA
7 * VivoBook E200HA
8 *
9 * Copyright (c) 2016 Yusuke Fujimaki <usk.fujimaki@gmail.com>
10 *
11 * This module based on hid-ortek by
12 * Copyright (c) 2010 Johnathon Harris <jmharris@gmail.com>
13 * Copyright (c) 2011 Jiri Kosina
14 *
15 * This module has been updated to add support for Asus i2c touchpad.
16 *
17 * Copyright (c) 2016 Brendan McGrath <redmcg@redmandi.dyndns.org>
18 * Copyright (c) 2016 Victor Vlasenko <victor.vlasenko@sysgears.com>
19 * Copyright (c) 2016 Frederik Wenigwieser <frederik.wenigwieser@gmail.com>
20 */
21
22 /*
23 * This program is free software; you can redistribute it and/or modify it
24 * under the terms of the GNU General Public License as published by the Free
25 * Software Foundation; either version 2 of the License, or (at your option)
26 * any later version.
27 */
28
29 #include <linux/dmi.h>
30 #include <linux/hid.h>
31 #include <linux/module.h>
32 #include <linux/input/mt.h>
33 #include <linux/usb.h> /* For to_usb_interface for T100 touchpad intf check */
34
35 #include "hid-ids.h"
36
37 MODULE_AUTHOR("Yusuke Fujimaki <usk.fujimaki@gmail.com>");
38 MODULE_AUTHOR("Brendan McGrath <redmcg@redmandi.dyndns.org>");
39 MODULE_AUTHOR("Victor Vlasenko <victor.vlasenko@sysgears.com>");
40 MODULE_AUTHOR("Frederik Wenigwieser <frederik.wenigwieser@gmail.com>");
41 MODULE_DESCRIPTION("Asus HID Keyboard and TouchPad");
42
43 #define T100_TPAD_INTF 2
44
45 #define T100CHI_MOUSE_REPORT_ID 0x06
46 #define FEATURE_REPORT_ID 0x0d
47 #define INPUT_REPORT_ID 0x5d
48 #define FEATURE_KBD_REPORT_ID 0x5a
49 #define FEATURE_KBD_REPORT_SIZE 16
50
51 #define SUPPORT_KBD_BACKLIGHT BIT(0)
52
53 #define MAX_TOUCH_MAJOR 8
54 #define MAX_PRESSURE 128
55
56 #define BTN_LEFT_MASK 0x01
57 #define CONTACT_TOOL_TYPE_MASK 0x80
58 #define CONTACT_X_MSB_MASK 0xf0
59 #define CONTACT_Y_MSB_MASK 0x0f
60 #define CONTACT_TOUCH_MAJOR_MASK 0x07
61 #define CONTACT_PRESSURE_MASK 0x7f
62
63 #define QUIRK_FIX_NOTEBOOK_REPORT BIT(0)
64 #define QUIRK_NO_INIT_REPORTS BIT(1)
65 #define QUIRK_SKIP_INPUT_MAPPING BIT(2)
66 #define QUIRK_IS_MULTITOUCH BIT(3)
67 #define QUIRK_NO_CONSUMER_USAGES BIT(4)
68 #define QUIRK_USE_KBD_BACKLIGHT BIT(5)
69 #define QUIRK_T100_KEYBOARD BIT(6)
70 #define QUIRK_T100CHI BIT(7)
71 #define QUIRK_G752_KEYBOARD BIT(8)
72
73 #define I2C_KEYBOARD_QUIRKS (QUIRK_FIX_NOTEBOOK_REPORT | \
74 QUIRK_NO_INIT_REPORTS | \
75 QUIRK_NO_CONSUMER_USAGES)
76 #define I2C_TOUCHPAD_QUIRKS (QUIRK_NO_INIT_REPORTS | \
77 QUIRK_SKIP_INPUT_MAPPING | \
78 QUIRK_IS_MULTITOUCH)
79
80 #define TRKID_SGN ((TRKID_MAX + 1) >> 1)
81
82 struct asus_kbd_leds {
83 struct led_classdev cdev;
84 struct hid_device *hdev;
85 struct work_struct work;
86 unsigned int brightness;
87 spinlock_t lock;
88 bool removed;
89 };
90
91 struct asus_touchpad_info {
92 int max_x;
93 int max_y;
94 int res_x;
95 int res_y;
96 int contact_size;
97 int max_contacts;
98 };
99
100 struct asus_drvdata {
101 unsigned long quirks;
102 struct input_dev *input;
103 struct asus_kbd_leds *kbd_backlight;
104 const struct asus_touchpad_info *tp;
105 bool enable_backlight;
106 };
107
108 static const struct asus_touchpad_info asus_i2c_tp = {
109 .max_x = 2794,
110 .max_y = 1758,
111 .contact_size = 5,
112 .max_contacts = 5,
113 };
114
115 static const struct asus_touchpad_info asus_t100ta_tp = {
116 .max_x = 2240,
117 .max_y = 1120,
118 .res_x = 30, /* units/mm */
119 .res_y = 27, /* units/mm */
120 .contact_size = 5,
121 .max_contacts = 5,
122 };
123
124 static const struct asus_touchpad_info asus_t100ha_tp = {
125 .max_x = 2640,
126 .max_y = 1320,
127 .res_x = 30, /* units/mm */
128 .res_y = 29, /* units/mm */
129 .contact_size = 5,
130 .max_contacts = 5,
131 };
132
133 static const struct asus_touchpad_info asus_t200ta_tp = {
134 .max_x = 3120,
135 .max_y = 1716,
136 .res_x = 30, /* units/mm */
137 .res_y = 28, /* units/mm */
138 .contact_size = 5,
139 .max_contacts = 5,
140 };
141
142 static const struct asus_touchpad_info asus_t100chi_tp = {
143 .max_x = 2640,
144 .max_y = 1320,
145 .res_x = 31, /* units/mm */
146 .res_y = 29, /* units/mm */
147 .contact_size = 3,
148 .max_contacts = 4,
149 };
150
asus_report_contact_down(struct asus_drvdata * drvdat,int toolType,u8 * data)151 static void asus_report_contact_down(struct asus_drvdata *drvdat,
152 int toolType, u8 *data)
153 {
154 struct input_dev *input = drvdat->input;
155 int touch_major, pressure, x, y;
156
157 x = (data[0] & CONTACT_X_MSB_MASK) << 4 | data[1];
158 y = drvdat->tp->max_y - ((data[0] & CONTACT_Y_MSB_MASK) << 8 | data[2]);
159
160 input_report_abs(input, ABS_MT_POSITION_X, x);
161 input_report_abs(input, ABS_MT_POSITION_Y, y);
162
163 if (drvdat->tp->contact_size < 5)
164 return;
165
166 if (toolType == MT_TOOL_PALM) {
167 touch_major = MAX_TOUCH_MAJOR;
168 pressure = MAX_PRESSURE;
169 } else {
170 touch_major = (data[3] >> 4) & CONTACT_TOUCH_MAJOR_MASK;
171 pressure = data[4] & CONTACT_PRESSURE_MASK;
172 }
173
174 input_report_abs(input, ABS_MT_TOUCH_MAJOR, touch_major);
175 input_report_abs(input, ABS_MT_PRESSURE, pressure);
176 }
177
178 /* Required for Synaptics Palm Detection */
asus_report_tool_width(struct asus_drvdata * drvdat)179 static void asus_report_tool_width(struct asus_drvdata *drvdat)
180 {
181 struct input_mt *mt = drvdat->input->mt;
182 struct input_mt_slot *oldest;
183 int oldid, count, i;
184
185 if (drvdat->tp->contact_size < 5)
186 return;
187
188 oldest = NULL;
189 oldid = mt->trkid;
190 count = 0;
191
192 for (i = 0; i < mt->num_slots; ++i) {
193 struct input_mt_slot *ps = &mt->slots[i];
194 int id = input_mt_get_value(ps, ABS_MT_TRACKING_ID);
195
196 if (id < 0)
197 continue;
198 if ((id - oldid) & TRKID_SGN) {
199 oldest = ps;
200 oldid = id;
201 }
202 count++;
203 }
204
205 if (oldest) {
206 input_report_abs(drvdat->input, ABS_TOOL_WIDTH,
207 input_mt_get_value(oldest, ABS_MT_TOUCH_MAJOR));
208 }
209 }
210
asus_report_input(struct asus_drvdata * drvdat,u8 * data,int size)211 static int asus_report_input(struct asus_drvdata *drvdat, u8 *data, int size)
212 {
213 int i, toolType = MT_TOOL_FINGER;
214 u8 *contactData = data + 2;
215
216 if (size != 3 + drvdat->tp->contact_size * drvdat->tp->max_contacts)
217 return 0;
218
219 for (i = 0; i < drvdat->tp->max_contacts; i++) {
220 bool down = !!(data[1] & BIT(i+3));
221
222 if (drvdat->tp->contact_size >= 5)
223 toolType = contactData[3] & CONTACT_TOOL_TYPE_MASK ?
224 MT_TOOL_PALM : MT_TOOL_FINGER;
225
226 input_mt_slot(drvdat->input, i);
227 input_mt_report_slot_state(drvdat->input, toolType, down);
228
229 if (down) {
230 asus_report_contact_down(drvdat, toolType, contactData);
231 contactData += drvdat->tp->contact_size;
232 }
233 }
234
235 input_report_key(drvdat->input, BTN_LEFT, data[1] & BTN_LEFT_MASK);
236 asus_report_tool_width(drvdat);
237
238 input_mt_sync_frame(drvdat->input);
239 input_sync(drvdat->input);
240
241 return 1;
242 }
243
asus_raw_event(struct hid_device * hdev,struct hid_report * report,u8 * data,int size)244 static int asus_raw_event(struct hid_device *hdev,
245 struct hid_report *report, u8 *data, int size)
246 {
247 struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
248
249 if (drvdata->tp && data[0] == INPUT_REPORT_ID)
250 return asus_report_input(drvdata, data, size);
251
252 return 0;
253 }
254
asus_kbd_set_report(struct hid_device * hdev,u8 * buf,size_t buf_size)255 static int asus_kbd_set_report(struct hid_device *hdev, u8 *buf, size_t buf_size)
256 {
257 unsigned char *dmabuf;
258 int ret;
259
260 dmabuf = kmemdup(buf, buf_size, GFP_KERNEL);
261 if (!dmabuf)
262 return -ENOMEM;
263
264 ret = hid_hw_raw_request(hdev, FEATURE_KBD_REPORT_ID, dmabuf,
265 buf_size, HID_FEATURE_REPORT,
266 HID_REQ_SET_REPORT);
267 kfree(dmabuf);
268
269 return ret;
270 }
271
asus_kbd_init(struct hid_device * hdev)272 static int asus_kbd_init(struct hid_device *hdev)
273 {
274 u8 buf[] = { FEATURE_KBD_REPORT_ID, 0x41, 0x53, 0x55, 0x53, 0x20, 0x54,
275 0x65, 0x63, 0x68, 0x2e, 0x49, 0x6e, 0x63, 0x2e, 0x00 };
276 int ret;
277
278 ret = asus_kbd_set_report(hdev, buf, sizeof(buf));
279 if (ret < 0)
280 hid_err(hdev, "Asus failed to send init command: %d\n", ret);
281
282 return ret;
283 }
284
asus_kbd_get_functions(struct hid_device * hdev,unsigned char * kbd_func)285 static int asus_kbd_get_functions(struct hid_device *hdev,
286 unsigned char *kbd_func)
287 {
288 u8 buf[] = { FEATURE_KBD_REPORT_ID, 0x05, 0x20, 0x31, 0x00, 0x08 };
289 u8 *readbuf;
290 int ret;
291
292 ret = asus_kbd_set_report(hdev, buf, sizeof(buf));
293 if (ret < 0) {
294 hid_err(hdev, "Asus failed to send configuration command: %d\n", ret);
295 return ret;
296 }
297
298 readbuf = kzalloc(FEATURE_KBD_REPORT_SIZE, GFP_KERNEL);
299 if (!readbuf)
300 return -ENOMEM;
301
302 ret = hid_hw_raw_request(hdev, FEATURE_KBD_REPORT_ID, readbuf,
303 FEATURE_KBD_REPORT_SIZE, HID_FEATURE_REPORT,
304 HID_REQ_GET_REPORT);
305 if (ret < 0) {
306 hid_err(hdev, "Asus failed to request functions: %d\n", ret);
307 kfree(readbuf);
308 return ret;
309 }
310
311 *kbd_func = readbuf[6];
312
313 kfree(readbuf);
314 return ret;
315 }
316
asus_schedule_work(struct asus_kbd_leds * led)317 static void asus_schedule_work(struct asus_kbd_leds *led)
318 {
319 unsigned long flags;
320
321 spin_lock_irqsave(&led->lock, flags);
322 if (!led->removed)
323 schedule_work(&led->work);
324 spin_unlock_irqrestore(&led->lock, flags);
325 }
326
asus_kbd_backlight_set(struct led_classdev * led_cdev,enum led_brightness brightness)327 static void asus_kbd_backlight_set(struct led_classdev *led_cdev,
328 enum led_brightness brightness)
329 {
330 struct asus_kbd_leds *led = container_of(led_cdev, struct asus_kbd_leds,
331 cdev);
332 unsigned long flags;
333
334 spin_lock_irqsave(&led->lock, flags);
335 led->brightness = brightness;
336 spin_unlock_irqrestore(&led->lock, flags);
337
338 asus_schedule_work(led);
339 }
340
asus_kbd_backlight_get(struct led_classdev * led_cdev)341 static enum led_brightness asus_kbd_backlight_get(struct led_classdev *led_cdev)
342 {
343 struct asus_kbd_leds *led = container_of(led_cdev, struct asus_kbd_leds,
344 cdev);
345 enum led_brightness brightness;
346 unsigned long flags;
347
348 spin_lock_irqsave(&led->lock, flags);
349 brightness = led->brightness;
350 spin_unlock_irqrestore(&led->lock, flags);
351
352 return brightness;
353 }
354
asus_kbd_backlight_work(struct work_struct * work)355 static void asus_kbd_backlight_work(struct work_struct *work)
356 {
357 struct asus_kbd_leds *led = container_of(work, struct asus_kbd_leds, work);
358 u8 buf[] = { FEATURE_KBD_REPORT_ID, 0xba, 0xc5, 0xc4, 0x00 };
359 int ret;
360 unsigned long flags;
361
362 spin_lock_irqsave(&led->lock, flags);
363 buf[4] = led->brightness;
364 spin_unlock_irqrestore(&led->lock, flags);
365
366 ret = asus_kbd_set_report(led->hdev, buf, sizeof(buf));
367 if (ret < 0)
368 hid_err(led->hdev, "Asus failed to set keyboard backlight: %d\n", ret);
369 }
370
asus_kbd_register_leds(struct hid_device * hdev)371 static int asus_kbd_register_leds(struct hid_device *hdev)
372 {
373 struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
374 unsigned char kbd_func;
375 int ret;
376
377 /* Initialize keyboard */
378 ret = asus_kbd_init(hdev);
379 if (ret < 0)
380 return ret;
381
382 /* Get keyboard functions */
383 ret = asus_kbd_get_functions(hdev, &kbd_func);
384 if (ret < 0)
385 return ret;
386
387 /* Check for backlight support */
388 if (!(kbd_func & SUPPORT_KBD_BACKLIGHT))
389 return -ENODEV;
390
391 drvdata->kbd_backlight = devm_kzalloc(&hdev->dev,
392 sizeof(struct asus_kbd_leds),
393 GFP_KERNEL);
394 if (!drvdata->kbd_backlight)
395 return -ENOMEM;
396
397 drvdata->kbd_backlight->removed = false;
398 drvdata->kbd_backlight->brightness = 0;
399 drvdata->kbd_backlight->hdev = hdev;
400 drvdata->kbd_backlight->cdev.name = "asus::kbd_backlight";
401 drvdata->kbd_backlight->cdev.max_brightness = 3;
402 drvdata->kbd_backlight->cdev.brightness_set = asus_kbd_backlight_set;
403 drvdata->kbd_backlight->cdev.brightness_get = asus_kbd_backlight_get;
404 INIT_WORK(&drvdata->kbd_backlight->work, asus_kbd_backlight_work);
405 spin_lock_init(&drvdata->kbd_backlight->lock);
406
407 ret = devm_led_classdev_register(&hdev->dev, &drvdata->kbd_backlight->cdev);
408 if (ret < 0) {
409 /* No need to have this still around */
410 devm_kfree(&hdev->dev, drvdata->kbd_backlight);
411 }
412
413 return ret;
414 }
415
asus_input_configured(struct hid_device * hdev,struct hid_input * hi)416 static int asus_input_configured(struct hid_device *hdev, struct hid_input *hi)
417 {
418 struct input_dev *input = hi->input;
419 struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
420
421 /* T100CHI uses MULTI_INPUT, bind the touchpad to the mouse hid_input */
422 if (drvdata->quirks & QUIRK_T100CHI &&
423 hi->report->id != T100CHI_MOUSE_REPORT_ID)
424 return 0;
425
426 if (drvdata->tp) {
427 int ret;
428
429 input_set_abs_params(input, ABS_MT_POSITION_X, 0,
430 drvdata->tp->max_x, 0, 0);
431 input_set_abs_params(input, ABS_MT_POSITION_Y, 0,
432 drvdata->tp->max_y, 0, 0);
433 input_abs_set_res(input, ABS_MT_POSITION_X, drvdata->tp->res_x);
434 input_abs_set_res(input, ABS_MT_POSITION_Y, drvdata->tp->res_y);
435
436 if (drvdata->tp->contact_size >= 5) {
437 input_set_abs_params(input, ABS_TOOL_WIDTH, 0,
438 MAX_TOUCH_MAJOR, 0, 0);
439 input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0,
440 MAX_TOUCH_MAJOR, 0, 0);
441 input_set_abs_params(input, ABS_MT_PRESSURE, 0,
442 MAX_PRESSURE, 0, 0);
443 }
444
445 __set_bit(BTN_LEFT, input->keybit);
446 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
447
448 ret = input_mt_init_slots(input, drvdata->tp->max_contacts,
449 INPUT_MT_POINTER);
450
451 if (ret) {
452 hid_err(hdev, "Asus input mt init slots failed: %d\n", ret);
453 return ret;
454 }
455 }
456
457 drvdata->input = input;
458
459 if (drvdata->enable_backlight && asus_kbd_register_leds(hdev))
460 hid_warn(hdev, "Failed to initialize backlight.\n");
461
462 return 0;
463 }
464
465 #define asus_map_key_clear(c) hid_map_usage_clear(hi, usage, bit, \
466 max, EV_KEY, (c))
asus_input_mapping(struct hid_device * hdev,struct hid_input * hi,struct hid_field * field,struct hid_usage * usage,unsigned long ** bit,int * max)467 static int asus_input_mapping(struct hid_device *hdev,
468 struct hid_input *hi, struct hid_field *field,
469 struct hid_usage *usage, unsigned long **bit,
470 int *max)
471 {
472 struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
473
474 if (drvdata->quirks & QUIRK_SKIP_INPUT_MAPPING) {
475 /* Don't map anything from the HID report.
476 * We do it all manually in asus_input_configured
477 */
478 return -1;
479 }
480
481 /*
482 * Ignore a bunch of bogus collections in the T100CHI descriptor.
483 * This avoids a bunch of non-functional hid_input devices getting
484 * created because of the T100CHI using HID_QUIRK_MULTI_INPUT.
485 */
486 if (drvdata->quirks & QUIRK_T100CHI) {
487 if (field->application == (HID_UP_GENDESK | 0x0080) ||
488 usage->hid == (HID_UP_GENDEVCTRLS | 0x0024) ||
489 usage->hid == (HID_UP_GENDEVCTRLS | 0x0025) ||
490 usage->hid == (HID_UP_GENDEVCTRLS | 0x0026))
491 return -1;
492 /*
493 * We use the hid_input for the mouse report for the touchpad,
494 * keep the left button, to avoid the core removing it.
495 */
496 if (field->application == HID_GD_MOUSE &&
497 usage->hid != (HID_UP_BUTTON | 1))
498 return -1;
499 }
500
501 /* ASUS-specific keyboard hotkeys */
502 if ((usage->hid & HID_USAGE_PAGE) == 0xff310000) {
503 set_bit(EV_REP, hi->input->evbit);
504 switch (usage->hid & HID_USAGE) {
505 case 0x10: asus_map_key_clear(KEY_BRIGHTNESSDOWN); break;
506 case 0x20: asus_map_key_clear(KEY_BRIGHTNESSUP); break;
507 case 0x35: asus_map_key_clear(KEY_DISPLAY_OFF); break;
508 case 0x6c: asus_map_key_clear(KEY_SLEEP); break;
509 case 0x82: asus_map_key_clear(KEY_CAMERA); break;
510 case 0x88: asus_map_key_clear(KEY_RFKILL); break;
511 case 0xb5: asus_map_key_clear(KEY_CALC); break;
512 case 0xc4: asus_map_key_clear(KEY_KBDILLUMUP); break;
513 case 0xc5: asus_map_key_clear(KEY_KBDILLUMDOWN); break;
514
515 /* ASUS touchpad toggle */
516 case 0x6b: asus_map_key_clear(KEY_F21); break;
517
518 /* ROG key */
519 case 0x38: asus_map_key_clear(KEY_PROG1); break;
520
521 /* Fn+C ASUS Splendid */
522 case 0xba: asus_map_key_clear(KEY_PROG2); break;
523
524 /* Fn+Space Power4Gear Hybrid */
525 case 0x5c: asus_map_key_clear(KEY_PROG3); break;
526
527 default:
528 /* ASUS lazily declares 256 usages, ignore the rest,
529 * as some make the keyboard appear as a pointer device. */
530 return -1;
531 }
532
533 /*
534 * Check and enable backlight only on devices with UsagePage ==
535 * 0xff31 to avoid initializing the keyboard firmware multiple
536 * times on devices with multiple HID descriptors but same
537 * PID/VID.
538 */
539 if (drvdata->quirks & QUIRK_USE_KBD_BACKLIGHT)
540 drvdata->enable_backlight = true;
541
542 return 1;
543 }
544
545 if ((usage->hid & HID_USAGE_PAGE) == HID_UP_MSVENDOR) {
546 set_bit(EV_REP, hi->input->evbit);
547 switch (usage->hid & HID_USAGE) {
548 case 0xff01: asus_map_key_clear(BTN_1); break;
549 case 0xff02: asus_map_key_clear(BTN_2); break;
550 case 0xff03: asus_map_key_clear(BTN_3); break;
551 case 0xff04: asus_map_key_clear(BTN_4); break;
552 case 0xff05: asus_map_key_clear(BTN_5); break;
553 case 0xff06: asus_map_key_clear(BTN_6); break;
554 case 0xff07: asus_map_key_clear(BTN_7); break;
555 case 0xff08: asus_map_key_clear(BTN_8); break;
556 case 0xff09: asus_map_key_clear(BTN_9); break;
557 case 0xff0a: asus_map_key_clear(BTN_A); break;
558 case 0xff0b: asus_map_key_clear(BTN_B); break;
559 case 0x00f1: asus_map_key_clear(KEY_WLAN); break;
560 case 0x00f2: asus_map_key_clear(KEY_BRIGHTNESSDOWN); break;
561 case 0x00f3: asus_map_key_clear(KEY_BRIGHTNESSUP); break;
562 case 0x00f4: asus_map_key_clear(KEY_DISPLAY_OFF); break;
563 case 0x00f7: asus_map_key_clear(KEY_CAMERA); break;
564 case 0x00f8: asus_map_key_clear(KEY_PROG1); break;
565 default:
566 return 0;
567 }
568
569 return 1;
570 }
571
572 if (drvdata->quirks & QUIRK_NO_CONSUMER_USAGES &&
573 (usage->hid & HID_USAGE_PAGE) == HID_UP_CONSUMER) {
574 switch (usage->hid & HID_USAGE) {
575 case 0xe2: /* Mute */
576 case 0xe9: /* Volume up */
577 case 0xea: /* Volume down */
578 return 0;
579 default:
580 /* Ignore dummy Consumer usages which make the
581 * keyboard incorrectly appear as a pointer device.
582 */
583 return -1;
584 }
585 }
586
587 return 0;
588 }
589
asus_start_multitouch(struct hid_device * hdev)590 static int asus_start_multitouch(struct hid_device *hdev)
591 {
592 int ret;
593 static const unsigned char buf[] = {
594 FEATURE_REPORT_ID, 0x00, 0x03, 0x01, 0x00
595 };
596 unsigned char *dmabuf = kmemdup(buf, sizeof(buf), GFP_KERNEL);
597
598 if (!dmabuf) {
599 ret = -ENOMEM;
600 hid_err(hdev, "Asus failed to alloc dma buf: %d\n", ret);
601 return ret;
602 }
603
604 ret = hid_hw_raw_request(hdev, dmabuf[0], dmabuf, sizeof(buf),
605 HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
606
607 kfree(dmabuf);
608
609 if (ret != sizeof(buf)) {
610 hid_err(hdev, "Asus failed to start multitouch: %d\n", ret);
611 return ret;
612 }
613
614 return 0;
615 }
616
asus_reset_resume(struct hid_device * hdev)617 static int __maybe_unused asus_reset_resume(struct hid_device *hdev)
618 {
619 struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
620
621 if (drvdata->tp)
622 return asus_start_multitouch(hdev);
623
624 return 0;
625 }
626
asus_probe(struct hid_device * hdev,const struct hid_device_id * id)627 static int asus_probe(struct hid_device *hdev, const struct hid_device_id *id)
628 {
629 int ret;
630 struct asus_drvdata *drvdata;
631
632 drvdata = devm_kzalloc(&hdev->dev, sizeof(*drvdata), GFP_KERNEL);
633 if (drvdata == NULL) {
634 hid_err(hdev, "Can't alloc Asus descriptor\n");
635 return -ENOMEM;
636 }
637
638 hid_set_drvdata(hdev, drvdata);
639
640 drvdata->quirks = id->driver_data;
641
642 if (drvdata->quirks & QUIRK_IS_MULTITOUCH)
643 drvdata->tp = &asus_i2c_tp;
644
645 if ((drvdata->quirks & QUIRK_T100_KEYBOARD) && hid_is_usb(hdev)) {
646 struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
647
648 if (intf->altsetting->desc.bInterfaceNumber == T100_TPAD_INTF) {
649 drvdata->quirks = QUIRK_SKIP_INPUT_MAPPING;
650 /*
651 * The T100HA uses the same USB-ids as the T100TAF and
652 * the T200TA uses the same USB-ids as the T100TA, while
653 * both have different max x/y values as the T100TA[F].
654 */
655 if (dmi_match(DMI_PRODUCT_NAME, "T100HAN"))
656 drvdata->tp = &asus_t100ha_tp;
657 else if (dmi_match(DMI_PRODUCT_NAME, "T200TA"))
658 drvdata->tp = &asus_t200ta_tp;
659 else
660 drvdata->tp = &asus_t100ta_tp;
661 }
662 }
663
664 if (drvdata->quirks & QUIRK_T100CHI) {
665 /*
666 * All functionality is on a single HID interface and for
667 * userspace the touchpad must be a separate input_dev.
668 */
669 hdev->quirks |= HID_QUIRK_MULTI_INPUT;
670 drvdata->tp = &asus_t100chi_tp;
671 }
672
673 if (drvdata->quirks & QUIRK_NO_INIT_REPORTS)
674 hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
675
676 ret = hid_parse(hdev);
677 if (ret) {
678 hid_err(hdev, "Asus hid parse failed: %d\n", ret);
679 return ret;
680 }
681
682 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
683 if (ret) {
684 hid_err(hdev, "Asus hw start failed: %d\n", ret);
685 return ret;
686 }
687
688 if (!drvdata->input) {
689 hid_err(hdev, "Asus input not registered\n");
690 ret = -ENOMEM;
691 goto err_stop_hw;
692 }
693
694 if (drvdata->tp) {
695 drvdata->input->name = "Asus TouchPad";
696 } else {
697 drvdata->input->name = "Asus Keyboard";
698 }
699
700 if (drvdata->tp) {
701 ret = asus_start_multitouch(hdev);
702 if (ret)
703 goto err_stop_hw;
704 }
705
706 return 0;
707 err_stop_hw:
708 hid_hw_stop(hdev);
709 return ret;
710 }
711
asus_remove(struct hid_device * hdev)712 static void asus_remove(struct hid_device *hdev)
713 {
714 struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
715 unsigned long flags;
716
717 if (drvdata->kbd_backlight) {
718 spin_lock_irqsave(&drvdata->kbd_backlight->lock, flags);
719 drvdata->kbd_backlight->removed = true;
720 spin_unlock_irqrestore(&drvdata->kbd_backlight->lock, flags);
721
722 cancel_work_sync(&drvdata->kbd_backlight->work);
723 }
724
725 hid_hw_stop(hdev);
726 }
727
728 static const __u8 asus_g752_fixed_rdesc[] = {
729 0x19, 0x00, /* Usage Minimum (0x00) */
730 0x2A, 0xFF, 0x00, /* Usage Maximum (0xFF) */
731 };
732
asus_report_fixup(struct hid_device * hdev,__u8 * rdesc,unsigned int * rsize)733 static __u8 *asus_report_fixup(struct hid_device *hdev, __u8 *rdesc,
734 unsigned int *rsize)
735 {
736 struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
737
738 if (drvdata->quirks & QUIRK_FIX_NOTEBOOK_REPORT &&
739 *rsize >= 56 && rdesc[54] == 0x25 && rdesc[55] == 0x65) {
740 hid_info(hdev, "Fixing up Asus notebook report descriptor\n");
741 rdesc[55] = 0xdd;
742 }
743 /* For the T100TA/T200TA keyboard dock */
744 if (drvdata->quirks & QUIRK_T100_KEYBOARD &&
745 (*rsize == 76 || *rsize == 101) &&
746 rdesc[73] == 0x81 && rdesc[74] == 0x01) {
747 hid_info(hdev, "Fixing up Asus T100 keyb report descriptor\n");
748 rdesc[74] &= ~HID_MAIN_ITEM_CONSTANT;
749 }
750 /* For the T100CHI keyboard dock */
751 if (drvdata->quirks & QUIRK_T100CHI &&
752 *rsize == 403 && rdesc[388] == 0x09 && rdesc[389] == 0x76) {
753 /*
754 * Change Usage (76h) to Usage Minimum (00h), Usage Maximum
755 * (FFh) and clear the flags in the Input() byte.
756 * Note the descriptor has a bogus 0 byte at the end so we
757 * only need 1 extra byte.
758 */
759 *rsize = 404;
760 rdesc = kmemdup(rdesc, *rsize, GFP_KERNEL);
761 if (!rdesc)
762 return NULL;
763
764 hid_info(hdev, "Fixing up T100CHI keyb report descriptor\n");
765 memmove(rdesc + 392, rdesc + 390, 12);
766 rdesc[388] = 0x19;
767 rdesc[389] = 0x00;
768 rdesc[390] = 0x29;
769 rdesc[391] = 0xff;
770 rdesc[402] = 0x00;
771 }
772 if (drvdata->quirks & QUIRK_G752_KEYBOARD &&
773 *rsize == 75 && rdesc[61] == 0x15 && rdesc[62] == 0x00) {
774 /* report is missing usage mninum and maximum */
775 __u8 *new_rdesc;
776 size_t new_size = *rsize + sizeof(asus_g752_fixed_rdesc);
777
778 new_rdesc = devm_kzalloc(&hdev->dev, new_size, GFP_KERNEL);
779 if (new_rdesc == NULL)
780 return rdesc;
781
782 hid_info(hdev, "Fixing up Asus G752 keyb report descriptor\n");
783 /* copy the valid part */
784 memcpy(new_rdesc, rdesc, 61);
785 /* insert missing part */
786 memcpy(new_rdesc + 61, asus_g752_fixed_rdesc, sizeof(asus_g752_fixed_rdesc));
787 /* copy remaining data */
788 memcpy(new_rdesc + 61 + sizeof(asus_g752_fixed_rdesc), rdesc + 61, *rsize - 61);
789
790 *rsize = new_size;
791 rdesc = new_rdesc;
792 }
793
794 return rdesc;
795 }
796
797 static const struct hid_device_id asus_devices[] = {
798 { HID_I2C_DEVICE(USB_VENDOR_ID_ASUSTEK,
799 USB_DEVICE_ID_ASUSTEK_I2C_KEYBOARD), I2C_KEYBOARD_QUIRKS},
800 { HID_I2C_DEVICE(USB_VENDOR_ID_ASUSTEK,
801 USB_DEVICE_ID_ASUSTEK_I2C_TOUCHPAD), I2C_TOUCHPAD_QUIRKS },
802 { HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK,
803 USB_DEVICE_ID_ASUSTEK_ROG_KEYBOARD1), QUIRK_USE_KBD_BACKLIGHT },
804 { HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK,
805 USB_DEVICE_ID_ASUSTEK_ROG_KEYBOARD2), QUIRK_USE_KBD_BACKLIGHT },
806 { HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK,
807 USB_DEVICE_ID_ASUSTEK_ROG_KEYBOARD3), QUIRK_G752_KEYBOARD },
808 { HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK,
809 USB_DEVICE_ID_ASUSTEK_T100TA_KEYBOARD),
810 QUIRK_T100_KEYBOARD | QUIRK_NO_CONSUMER_USAGES },
811 { HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK,
812 USB_DEVICE_ID_ASUSTEK_T100TAF_KEYBOARD),
813 QUIRK_T100_KEYBOARD | QUIRK_NO_CONSUMER_USAGES },
814 { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_ASUS_AK1D) },
815 { HID_USB_DEVICE(USB_VENDOR_ID_TURBOX, USB_DEVICE_ID_ASUS_MD_5110) },
816 { HID_USB_DEVICE(USB_VENDOR_ID_JESS, USB_DEVICE_ID_ASUS_MD_5112) },
817 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ASUSTEK,
818 USB_DEVICE_ID_ASUSTEK_T100CHI_KEYBOARD), QUIRK_T100CHI },
819
820 { }
821 };
822 MODULE_DEVICE_TABLE(hid, asus_devices);
823
824 static struct hid_driver asus_driver = {
825 .name = "asus",
826 .id_table = asus_devices,
827 .report_fixup = asus_report_fixup,
828 .probe = asus_probe,
829 .remove = asus_remove,
830 .input_mapping = asus_input_mapping,
831 .input_configured = asus_input_configured,
832 #ifdef CONFIG_PM
833 .reset_resume = asus_reset_resume,
834 #endif
835 .raw_event = asus_raw_event
836 };
837 module_hid_driver(asus_driver);
838
839 MODULE_LICENSE("GPL");
840