50c294be8324ab803450c00165717962e1603d13
[muen/linux.git] / drivers / hid / hid-asus.c
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/hid.h>
30 #include <linux/module.h>
31 #include <linux/input/mt.h>
32 #include <linux/usb.h> /* For to_usb_interface for T100 touchpad intf check */
33
34 #include "hid-ids.h"
35
36 MODULE_AUTHOR("Yusuke Fujimaki <usk.fujimaki@gmail.com>");
37 MODULE_AUTHOR("Brendan McGrath <redmcg@redmandi.dyndns.org>");
38 MODULE_AUTHOR("Victor Vlasenko <victor.vlasenko@sysgears.com>");
39 MODULE_AUTHOR("Frederik Wenigwieser <frederik.wenigwieser@gmail.com>");
40 MODULE_DESCRIPTION("Asus HID Keyboard and TouchPad");
41
42 #define T100_TPAD_INTF 2
43
44 #define T100CHI_MOUSE_REPORT_ID 0x06
45 #define FEATURE_REPORT_ID 0x0d
46 #define INPUT_REPORT_ID 0x5d
47 #define FEATURE_KBD_REPORT_ID 0x5a
48 #define FEATURE_KBD_REPORT_SIZE 16
49
50 #define SUPPORT_KBD_BACKLIGHT BIT(0)
51
52 #define MAX_TOUCH_MAJOR 8
53 #define MAX_PRESSURE 128
54
55 #define BTN_LEFT_MASK 0x01
56 #define CONTACT_TOOL_TYPE_MASK 0x80
57 #define CONTACT_X_MSB_MASK 0xf0
58 #define CONTACT_Y_MSB_MASK 0x0f
59 #define CONTACT_TOUCH_MAJOR_MASK 0x07
60 #define CONTACT_PRESSURE_MASK 0x7f
61
62 #define QUIRK_FIX_NOTEBOOK_REPORT       BIT(0)
63 #define QUIRK_NO_INIT_REPORTS           BIT(1)
64 #define QUIRK_SKIP_INPUT_MAPPING        BIT(2)
65 #define QUIRK_IS_MULTITOUCH             BIT(3)
66 #define QUIRK_NO_CONSUMER_USAGES        BIT(4)
67 #define QUIRK_USE_KBD_BACKLIGHT         BIT(5)
68 #define QUIRK_T100_KEYBOARD             BIT(6)
69 #define QUIRK_T100CHI                   BIT(7)
70
71 #define I2C_KEYBOARD_QUIRKS                     (QUIRK_FIX_NOTEBOOK_REPORT | \
72                                                  QUIRK_NO_INIT_REPORTS | \
73                                                  QUIRK_NO_CONSUMER_USAGES)
74 #define I2C_TOUCHPAD_QUIRKS                     (QUIRK_NO_INIT_REPORTS | \
75                                                  QUIRK_SKIP_INPUT_MAPPING | \
76                                                  QUIRK_IS_MULTITOUCH)
77
78 #define TRKID_SGN       ((TRKID_MAX + 1) >> 1)
79
80 struct asus_kbd_leds {
81         struct led_classdev cdev;
82         struct hid_device *hdev;
83         struct work_struct work;
84         unsigned int brightness;
85         bool removed;
86 };
87
88 struct asus_touchpad_info {
89         int max_x;
90         int max_y;
91         int res_x;
92         int res_y;
93         int contact_size;
94         int max_contacts;
95 };
96
97 struct asus_drvdata {
98         unsigned long quirks;
99         struct input_dev *input;
100         struct asus_kbd_leds *kbd_backlight;
101         const struct asus_touchpad_info *tp;
102         bool enable_backlight;
103 };
104
105 static const struct asus_touchpad_info asus_i2c_tp = {
106         .max_x = 2794,
107         .max_y = 1758,
108         .contact_size = 5,
109         .max_contacts = 5,
110 };
111
112 static const struct asus_touchpad_info asus_t100ta_tp = {
113         .max_x = 2240,
114         .max_y = 1120,
115         .res_x = 30, /* units/mm */
116         .res_y = 27, /* units/mm */
117         .contact_size = 5,
118         .max_contacts = 5,
119 };
120
121 static const struct asus_touchpad_info asus_t100chi_tp = {
122         .max_x = 2640,
123         .max_y = 1320,
124         .res_x = 31, /* units/mm */
125         .res_y = 29, /* units/mm */
126         .contact_size = 3,
127         .max_contacts = 4,
128 };
129
130 static void asus_report_contact_down(struct asus_drvdata *drvdat,
131                 int toolType, u8 *data)
132 {
133         struct input_dev *input = drvdat->input;
134         int touch_major, pressure, x, y;
135
136         x = (data[0] & CONTACT_X_MSB_MASK) << 4 | data[1];
137         y = drvdat->tp->max_y - ((data[0] & CONTACT_Y_MSB_MASK) << 8 | data[2]);
138
139         input_report_abs(input, ABS_MT_POSITION_X, x);
140         input_report_abs(input, ABS_MT_POSITION_Y, y);
141
142         if (drvdat->tp->contact_size < 5)
143                 return;
144
145         if (toolType == MT_TOOL_PALM) {
146                 touch_major = MAX_TOUCH_MAJOR;
147                 pressure = MAX_PRESSURE;
148         } else {
149                 touch_major = (data[3] >> 4) & CONTACT_TOUCH_MAJOR_MASK;
150                 pressure = data[4] & CONTACT_PRESSURE_MASK;
151         }
152
153         input_report_abs(input, ABS_MT_TOUCH_MAJOR, touch_major);
154         input_report_abs(input, ABS_MT_PRESSURE, pressure);
155 }
156
157 /* Required for Synaptics Palm Detection */
158 static void asus_report_tool_width(struct asus_drvdata *drvdat)
159 {
160         struct input_mt *mt = drvdat->input->mt;
161         struct input_mt_slot *oldest;
162         int oldid, count, i;
163
164         if (drvdat->tp->contact_size < 5)
165                 return;
166
167         oldest = NULL;
168         oldid = mt->trkid;
169         count = 0;
170
171         for (i = 0; i < mt->num_slots; ++i) {
172                 struct input_mt_slot *ps = &mt->slots[i];
173                 int id = input_mt_get_value(ps, ABS_MT_TRACKING_ID);
174
175                 if (id < 0)
176                         continue;
177                 if ((id - oldid) & TRKID_SGN) {
178                         oldest = ps;
179                         oldid = id;
180                 }
181                 count++;
182         }
183
184         if (oldest) {
185                 input_report_abs(drvdat->input, ABS_TOOL_WIDTH,
186                         input_mt_get_value(oldest, ABS_MT_TOUCH_MAJOR));
187         }
188 }
189
190 static int asus_report_input(struct asus_drvdata *drvdat, u8 *data, int size)
191 {
192         int i, toolType = MT_TOOL_FINGER;
193         u8 *contactData = data + 2;
194
195         if (size != 3 + drvdat->tp->contact_size * drvdat->tp->max_contacts)
196                 return 0;
197
198         for (i = 0; i < drvdat->tp->max_contacts; i++) {
199                 bool down = !!(data[1] & BIT(i+3));
200
201                 if (drvdat->tp->contact_size >= 5)
202                         toolType = contactData[3] & CONTACT_TOOL_TYPE_MASK ?
203                                                 MT_TOOL_PALM : MT_TOOL_FINGER;
204
205                 input_mt_slot(drvdat->input, i);
206                 input_mt_report_slot_state(drvdat->input, toolType, down);
207
208                 if (down) {
209                         asus_report_contact_down(drvdat, toolType, contactData);
210                         contactData += drvdat->tp->contact_size;
211                 }
212         }
213
214         input_report_key(drvdat->input, BTN_LEFT, data[1] & BTN_LEFT_MASK);
215         asus_report_tool_width(drvdat);
216
217         input_mt_sync_frame(drvdat->input);
218         input_sync(drvdat->input);
219
220         return 1;
221 }
222
223 static int asus_raw_event(struct hid_device *hdev,
224                 struct hid_report *report, u8 *data, int size)
225 {
226         struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
227
228         if (drvdata->tp && data[0] == INPUT_REPORT_ID)
229                 return asus_report_input(drvdata, data, size);
230
231         return 0;
232 }
233
234 static int asus_kbd_set_report(struct hid_device *hdev, u8 *buf, size_t buf_size)
235 {
236         unsigned char *dmabuf;
237         int ret;
238
239         dmabuf = kmemdup(buf, buf_size, GFP_KERNEL);
240         if (!dmabuf)
241                 return -ENOMEM;
242
243         ret = hid_hw_raw_request(hdev, FEATURE_KBD_REPORT_ID, dmabuf,
244                                  buf_size, HID_FEATURE_REPORT,
245                                  HID_REQ_SET_REPORT);
246         kfree(dmabuf);
247
248         return ret;
249 }
250
251 static int asus_kbd_init(struct hid_device *hdev)
252 {
253         u8 buf[] = { FEATURE_KBD_REPORT_ID, 0x41, 0x53, 0x55, 0x53, 0x20, 0x54,
254                      0x65, 0x63, 0x68, 0x2e, 0x49, 0x6e, 0x63, 0x2e, 0x00 };
255         int ret;
256
257         ret = asus_kbd_set_report(hdev, buf, sizeof(buf));
258         if (ret < 0)
259                 hid_err(hdev, "Asus failed to send init command: %d\n", ret);
260
261         return ret;
262 }
263
264 static int asus_kbd_get_functions(struct hid_device *hdev,
265                                   unsigned char *kbd_func)
266 {
267         u8 buf[] = { FEATURE_KBD_REPORT_ID, 0x05, 0x20, 0x31, 0x00, 0x08 };
268         u8 *readbuf;
269         int ret;
270
271         ret = asus_kbd_set_report(hdev, buf, sizeof(buf));
272         if (ret < 0) {
273                 hid_err(hdev, "Asus failed to send configuration command: %d\n", ret);
274                 return ret;
275         }
276
277         readbuf = kzalloc(FEATURE_KBD_REPORT_SIZE, GFP_KERNEL);
278         if (!readbuf)
279                 return -ENOMEM;
280
281         ret = hid_hw_raw_request(hdev, FEATURE_KBD_REPORT_ID, readbuf,
282                                  FEATURE_KBD_REPORT_SIZE, HID_FEATURE_REPORT,
283                                  HID_REQ_GET_REPORT);
284         if (ret < 0) {
285                 hid_err(hdev, "Asus failed to request functions: %d\n", ret);
286                 kfree(readbuf);
287                 return ret;
288         }
289
290         *kbd_func = readbuf[6];
291
292         kfree(readbuf);
293         return ret;
294 }
295
296 static void asus_kbd_backlight_set(struct led_classdev *led_cdev,
297                                    enum led_brightness brightness)
298 {
299         struct asus_kbd_leds *led = container_of(led_cdev, struct asus_kbd_leds,
300                                                  cdev);
301         if (led->brightness == brightness)
302                 return;
303
304         led->brightness = brightness;
305         schedule_work(&led->work);
306 }
307
308 static enum led_brightness asus_kbd_backlight_get(struct led_classdev *led_cdev)
309 {
310         struct asus_kbd_leds *led = container_of(led_cdev, struct asus_kbd_leds,
311                                                  cdev);
312
313         return led->brightness;
314 }
315
316 static void asus_kbd_backlight_work(struct work_struct *work)
317 {
318         struct asus_kbd_leds *led = container_of(work, struct asus_kbd_leds, work);
319         u8 buf[] = { FEATURE_KBD_REPORT_ID, 0xba, 0xc5, 0xc4, 0x00 };
320         int ret;
321
322         if (led->removed)
323                 return;
324
325         buf[4] = led->brightness;
326
327         ret = asus_kbd_set_report(led->hdev, buf, sizeof(buf));
328         if (ret < 0)
329                 hid_err(led->hdev, "Asus failed to set keyboard backlight: %d\n", ret);
330 }
331
332 static int asus_kbd_register_leds(struct hid_device *hdev)
333 {
334         struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
335         unsigned char kbd_func;
336         int ret;
337
338         /* Initialize keyboard */
339         ret = asus_kbd_init(hdev);
340         if (ret < 0)
341                 return ret;
342
343         /* Get keyboard functions */
344         ret = asus_kbd_get_functions(hdev, &kbd_func);
345         if (ret < 0)
346                 return ret;
347
348         /* Check for backlight support */
349         if (!(kbd_func & SUPPORT_KBD_BACKLIGHT))
350                 return -ENODEV;
351
352         drvdata->kbd_backlight = devm_kzalloc(&hdev->dev,
353                                               sizeof(struct asus_kbd_leds),
354                                               GFP_KERNEL);
355         if (!drvdata->kbd_backlight)
356                 return -ENOMEM;
357
358         drvdata->kbd_backlight->removed = false;
359         drvdata->kbd_backlight->brightness = 0;
360         drvdata->kbd_backlight->hdev = hdev;
361         drvdata->kbd_backlight->cdev.name = "asus::kbd_backlight";
362         drvdata->kbd_backlight->cdev.max_brightness = 3;
363         drvdata->kbd_backlight->cdev.brightness_set = asus_kbd_backlight_set;
364         drvdata->kbd_backlight->cdev.brightness_get = asus_kbd_backlight_get;
365         INIT_WORK(&drvdata->kbd_backlight->work, asus_kbd_backlight_work);
366
367         ret = devm_led_classdev_register(&hdev->dev, &drvdata->kbd_backlight->cdev);
368         if (ret < 0) {
369                 /* No need to have this still around */
370                 devm_kfree(&hdev->dev, drvdata->kbd_backlight);
371         }
372
373         return ret;
374 }
375
376 static int asus_input_configured(struct hid_device *hdev, struct hid_input *hi)
377 {
378         struct input_dev *input = hi->input;
379         struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
380
381         /* T100CHI uses MULTI_INPUT, bind the touchpad to the mouse hid_input */
382         if (drvdata->quirks & QUIRK_T100CHI &&
383             hi->report->id != T100CHI_MOUSE_REPORT_ID)
384                 return 0;
385
386         if (drvdata->tp) {
387                 int ret;
388
389                 input_set_abs_params(input, ABS_MT_POSITION_X, 0,
390                                      drvdata->tp->max_x, 0, 0);
391                 input_set_abs_params(input, ABS_MT_POSITION_Y, 0,
392                                      drvdata->tp->max_y, 0, 0);
393                 input_abs_set_res(input, ABS_MT_POSITION_X, drvdata->tp->res_x);
394                 input_abs_set_res(input, ABS_MT_POSITION_Y, drvdata->tp->res_y);
395
396                 if (drvdata->tp->contact_size >= 5) {
397                         input_set_abs_params(input, ABS_TOOL_WIDTH, 0,
398                                              MAX_TOUCH_MAJOR, 0, 0);
399                         input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0,
400                                              MAX_TOUCH_MAJOR, 0, 0);
401                         input_set_abs_params(input, ABS_MT_PRESSURE, 0,
402                                               MAX_PRESSURE, 0, 0);
403                 }
404
405                 __set_bit(BTN_LEFT, input->keybit);
406                 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
407
408                 ret = input_mt_init_slots(input, drvdata->tp->max_contacts,
409                                           INPUT_MT_POINTER);
410
411                 if (ret) {
412                         hid_err(hdev, "Asus input mt init slots failed: %d\n", ret);
413                         return ret;
414                 }
415         }
416
417         drvdata->input = input;
418
419         if (drvdata->enable_backlight && asus_kbd_register_leds(hdev))
420                 hid_warn(hdev, "Failed to initialize backlight.\n");
421
422         return 0;
423 }
424
425 #define asus_map_key_clear(c)   hid_map_usage_clear(hi, usage, bit, \
426                                                     max, EV_KEY, (c))
427 static int asus_input_mapping(struct hid_device *hdev,
428                 struct hid_input *hi, struct hid_field *field,
429                 struct hid_usage *usage, unsigned long **bit,
430                 int *max)
431 {
432         struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
433
434         if (drvdata->quirks & QUIRK_SKIP_INPUT_MAPPING) {
435                 /* Don't map anything from the HID report.
436                  * We do it all manually in asus_input_configured
437                  */
438                 return -1;
439         }
440
441         /*
442          * Ignore a bunch of bogus collections in the T100CHI descriptor.
443          * This avoids a bunch of non-functional hid_input devices getting
444          * created because of the T100CHI using HID_QUIRK_MULTI_INPUT.
445          */
446         if (drvdata->quirks & QUIRK_T100CHI) {
447                 if (field->application == (HID_UP_GENDESK | 0x0080) ||
448                     usage->hid == (HID_UP_GENDEVCTRLS | 0x0024) ||
449                     usage->hid == (HID_UP_GENDEVCTRLS | 0x0025) ||
450                     usage->hid == (HID_UP_GENDEVCTRLS | 0x0026))
451                         return -1;
452                 /*
453                  * We use the hid_input for the mouse report for the touchpad,
454                  * keep the left button, to avoid the core removing it.
455                  */
456                 if (field->application == HID_GD_MOUSE &&
457                     usage->hid != (HID_UP_BUTTON | 1))
458                         return -1;
459         }
460
461         /* ASUS-specific keyboard hotkeys */
462         if ((usage->hid & HID_USAGE_PAGE) == 0xff310000) {
463                 set_bit(EV_REP, hi->input->evbit);
464                 switch (usage->hid & HID_USAGE) {
465                 case 0x10: asus_map_key_clear(KEY_BRIGHTNESSDOWN);      break;
466                 case 0x20: asus_map_key_clear(KEY_BRIGHTNESSUP);                break;
467                 case 0x35: asus_map_key_clear(KEY_DISPLAY_OFF);         break;
468                 case 0x6c: asus_map_key_clear(KEY_SLEEP);               break;
469                 case 0x82: asus_map_key_clear(KEY_CAMERA);              break;
470                 case 0x88: asus_map_key_clear(KEY_RFKILL);                      break;
471                 case 0xb5: asus_map_key_clear(KEY_CALC);                        break;
472                 case 0xc4: asus_map_key_clear(KEY_KBDILLUMUP);          break;
473                 case 0xc5: asus_map_key_clear(KEY_KBDILLUMDOWN);                break;
474
475                 /* ASUS touchpad toggle */
476                 case 0x6b: asus_map_key_clear(KEY_F21);                 break;
477
478                 /* ROG key */
479                 case 0x38: asus_map_key_clear(KEY_PROG1);               break;
480
481                 /* Fn+C ASUS Splendid */
482                 case 0xba: asus_map_key_clear(KEY_PROG2);               break;
483
484                 /* Fn+Space Power4Gear Hybrid */
485                 case 0x5c: asus_map_key_clear(KEY_PROG3);               break;
486
487                 default:
488                         /* ASUS lazily declares 256 usages, ignore the rest,
489                          * as some make the keyboard appear as a pointer device. */
490                         return -1;
491                 }
492
493                 /*
494                  * Check and enable backlight only on devices with UsagePage ==
495                  * 0xff31 to avoid initializing the keyboard firmware multiple
496                  * times on devices with multiple HID descriptors but same
497                  * PID/VID.
498                  */
499                 if (drvdata->quirks & QUIRK_USE_KBD_BACKLIGHT)
500                         drvdata->enable_backlight = true;
501
502                 return 1;
503         }
504
505         if ((usage->hid & HID_USAGE_PAGE) == HID_UP_MSVENDOR) {
506                 set_bit(EV_REP, hi->input->evbit);
507                 switch (usage->hid & HID_USAGE) {
508                 case 0xff01: asus_map_key_clear(BTN_1); break;
509                 case 0xff02: asus_map_key_clear(BTN_2); break;
510                 case 0xff03: asus_map_key_clear(BTN_3); break;
511                 case 0xff04: asus_map_key_clear(BTN_4); break;
512                 case 0xff05: asus_map_key_clear(BTN_5); break;
513                 case 0xff06: asus_map_key_clear(BTN_6); break;
514                 case 0xff07: asus_map_key_clear(BTN_7); break;
515                 case 0xff08: asus_map_key_clear(BTN_8); break;
516                 case 0xff09: asus_map_key_clear(BTN_9); break;
517                 case 0xff0a: asus_map_key_clear(BTN_A); break;
518                 case 0xff0b: asus_map_key_clear(BTN_B); break;
519                 case 0x00f1: asus_map_key_clear(KEY_WLAN);      break;
520                 case 0x00f2: asus_map_key_clear(KEY_BRIGHTNESSDOWN);    break;
521                 case 0x00f3: asus_map_key_clear(KEY_BRIGHTNESSUP);      break;
522                 case 0x00f4: asus_map_key_clear(KEY_DISPLAY_OFF);       break;
523                 case 0x00f7: asus_map_key_clear(KEY_CAMERA);    break;
524                 case 0x00f8: asus_map_key_clear(KEY_PROG1);     break;
525                 default:
526                         return 0;
527                 }
528
529                 return 1;
530         }
531
532         if (drvdata->quirks & QUIRK_NO_CONSUMER_USAGES &&
533                 (usage->hid & HID_USAGE_PAGE) == HID_UP_CONSUMER) {
534                 switch (usage->hid & HID_USAGE) {
535                 case 0xe2: /* Mute */
536                 case 0xe9: /* Volume up */
537                 case 0xea: /* Volume down */
538                         return 0;
539                 default:
540                         /* Ignore dummy Consumer usages which make the
541                          * keyboard incorrectly appear as a pointer device.
542                          */
543                         return -1;
544                 }
545         }
546
547         return 0;
548 }
549
550 static int asus_start_multitouch(struct hid_device *hdev)
551 {
552         int ret;
553         const unsigned char buf[] = { FEATURE_REPORT_ID, 0x00, 0x03, 0x01, 0x00 };
554         unsigned char *dmabuf = kmemdup(buf, sizeof(buf), GFP_KERNEL);
555
556         if (!dmabuf) {
557                 ret = -ENOMEM;
558                 hid_err(hdev, "Asus failed to alloc dma buf: %d\n", ret);
559                 return ret;
560         }
561
562         ret = hid_hw_raw_request(hdev, dmabuf[0], dmabuf, sizeof(buf),
563                                         HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
564
565         kfree(dmabuf);
566
567         if (ret != sizeof(buf)) {
568                 hid_err(hdev, "Asus failed to start multitouch: %d\n", ret);
569                 return ret;
570         }
571
572         return 0;
573 }
574
575 static int __maybe_unused asus_reset_resume(struct hid_device *hdev)
576 {
577         struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
578
579         if (drvdata->tp)
580                 return asus_start_multitouch(hdev);
581
582         return 0;
583 }
584
585 static int asus_probe(struct hid_device *hdev, const struct hid_device_id *id)
586 {
587         int ret;
588         struct asus_drvdata *drvdata;
589
590         drvdata = devm_kzalloc(&hdev->dev, sizeof(*drvdata), GFP_KERNEL);
591         if (drvdata == NULL) {
592                 hid_err(hdev, "Can't alloc Asus descriptor\n");
593                 return -ENOMEM;
594         }
595
596         hid_set_drvdata(hdev, drvdata);
597
598         drvdata->quirks = id->driver_data;
599
600         if (drvdata->quirks & QUIRK_IS_MULTITOUCH)
601                 drvdata->tp = &asus_i2c_tp;
602
603         if (drvdata->quirks & QUIRK_T100_KEYBOARD) {
604                 struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
605
606                 if (intf->altsetting->desc.bInterfaceNumber == T100_TPAD_INTF) {
607                         drvdata->quirks = QUIRK_SKIP_INPUT_MAPPING;
608                         drvdata->tp = &asus_t100ta_tp;
609                 }
610         }
611
612         if (drvdata->quirks & QUIRK_T100CHI) {
613                 /*
614                  * All functionality is on a single HID interface and for
615                  * userspace the touchpad must be a separate input_dev.
616                  */
617                 hdev->quirks |= HID_QUIRK_MULTI_INPUT |
618                                 HID_QUIRK_NO_EMPTY_INPUT;
619                 drvdata->tp = &asus_t100chi_tp;
620         }
621
622         if (drvdata->quirks & QUIRK_NO_INIT_REPORTS)
623                 hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
624
625         ret = hid_parse(hdev);
626         if (ret) {
627                 hid_err(hdev, "Asus hid parse failed: %d\n", ret);
628                 return ret;
629         }
630
631         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
632         if (ret) {
633                 hid_err(hdev, "Asus hw start failed: %d\n", ret);
634                 return ret;
635         }
636
637         if (!drvdata->input) {
638                 hid_err(hdev, "Asus input not registered\n");
639                 ret = -ENOMEM;
640                 goto err_stop_hw;
641         }
642
643         if (drvdata->tp) {
644                 drvdata->input->name = "Asus TouchPad";
645         } else {
646                 drvdata->input->name = "Asus Keyboard";
647         }
648
649         if (drvdata->tp) {
650                 ret = asus_start_multitouch(hdev);
651                 if (ret)
652                         goto err_stop_hw;
653         }
654
655         return 0;
656 err_stop_hw:
657         hid_hw_stop(hdev);
658         return ret;
659 }
660
661 static void asus_remove(struct hid_device *hdev)
662 {
663         struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
664
665         if (drvdata->kbd_backlight) {
666                 drvdata->kbd_backlight->removed = true;
667                 cancel_work_sync(&drvdata->kbd_backlight->work);
668         }
669
670         hid_hw_stop(hdev);
671 }
672
673 static __u8 *asus_report_fixup(struct hid_device *hdev, __u8 *rdesc,
674                 unsigned int *rsize)
675 {
676         struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
677
678         if (drvdata->quirks & QUIRK_FIX_NOTEBOOK_REPORT &&
679                         *rsize >= 56 && rdesc[54] == 0x25 && rdesc[55] == 0x65) {
680                 hid_info(hdev, "Fixing up Asus notebook report descriptor\n");
681                 rdesc[55] = 0xdd;
682         }
683         /* For the T100TA keyboard dock */
684         if (drvdata->quirks & QUIRK_T100_KEYBOARD &&
685                  *rsize == 76 && rdesc[73] == 0x81 && rdesc[74] == 0x01) {
686                 hid_info(hdev, "Fixing up Asus T100 keyb report descriptor\n");
687                 rdesc[74] &= ~HID_MAIN_ITEM_CONSTANT;
688         }
689         /* For the T100CHI keyboard dock */
690         if (drvdata->quirks & QUIRK_T100CHI &&
691                  *rsize == 403 && rdesc[388] == 0x09 && rdesc[389] == 0x76) {
692                 /*
693                  * Change Usage (76h) to Usage Minimum (00h), Usage Maximum
694                  * (FFh) and clear the flags in the Input() byte.
695                  * Note the descriptor has a bogus 0 byte at the end so we
696                  * only need 1 extra byte.
697                  */
698                 *rsize = 404;
699                 rdesc = kmemdup(rdesc, *rsize, GFP_KERNEL);
700                 if (!rdesc)
701                         return NULL;
702
703                 hid_info(hdev, "Fixing up T100CHI keyb report descriptor\n");
704                 memmove(rdesc + 392, rdesc + 390, 12);
705                 rdesc[388] = 0x19;
706                 rdesc[389] = 0x00;
707                 rdesc[390] = 0x29;
708                 rdesc[391] = 0xff;
709                 rdesc[402] = 0x00;
710         }
711
712         return rdesc;
713 }
714
715 static const struct hid_device_id asus_devices[] = {
716         { HID_I2C_DEVICE(USB_VENDOR_ID_ASUSTEK,
717                 USB_DEVICE_ID_ASUSTEK_I2C_KEYBOARD), I2C_KEYBOARD_QUIRKS},
718         { HID_I2C_DEVICE(USB_VENDOR_ID_ASUSTEK,
719                 USB_DEVICE_ID_ASUSTEK_I2C_TOUCHPAD), I2C_TOUCHPAD_QUIRKS },
720         { HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK,
721                 USB_DEVICE_ID_ASUSTEK_ROG_KEYBOARD1) },
722         { HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK,
723                 USB_DEVICE_ID_ASUSTEK_ROG_KEYBOARD2), QUIRK_USE_KBD_BACKLIGHT },
724         { HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK,
725                 USB_DEVICE_ID_ASUSTEK_T100_KEYBOARD),
726           QUIRK_T100_KEYBOARD | QUIRK_NO_CONSUMER_USAGES },
727         { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_ASUS_AK1D) },
728         { HID_USB_DEVICE(USB_VENDOR_ID_TURBOX, USB_DEVICE_ID_ASUS_MD_5110) },
729         { HID_USB_DEVICE(USB_VENDOR_ID_JESS, USB_DEVICE_ID_ASUS_MD_5112) },
730         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ASUSTEK,
731                 USB_DEVICE_ID_ASUSTEK_T100CHI_KEYBOARD), QUIRK_T100CHI },
732
733         { }
734 };
735 MODULE_DEVICE_TABLE(hid, asus_devices);
736
737 static struct hid_driver asus_driver = {
738         .name                   = "asus",
739         .id_table               = asus_devices,
740         .report_fixup           = asus_report_fixup,
741         .probe                  = asus_probe,
742         .remove                 = asus_remove,
743         .input_mapping          = asus_input_mapping,
744         .input_configured       = asus_input_configured,
745 #ifdef CONFIG_PM
746         .reset_resume           = asus_reset_resume,
747 #endif
748         .raw_event              = asus_raw_event
749 };
750 module_hid_driver(asus_driver);
751
752 MODULE_LICENSE("GPL");