Merge branches 'for-4.16/upstream' and 'for-4.15/upstream-fixes' into for-linus
[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/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         bool removed;
88 };
89
90 struct asus_touchpad_info {
91         int max_x;
92         int max_y;
93         int res_x;
94         int res_y;
95         int contact_size;
96         int max_contacts;
97 };
98
99 struct asus_drvdata {
100         unsigned long quirks;
101         struct input_dev *input;
102         struct asus_kbd_leds *kbd_backlight;
103         const struct asus_touchpad_info *tp;
104         bool enable_backlight;
105 };
106
107 static const struct asus_touchpad_info asus_i2c_tp = {
108         .max_x = 2794,
109         .max_y = 1758,
110         .contact_size = 5,
111         .max_contacts = 5,
112 };
113
114 static const struct asus_touchpad_info asus_t100ta_tp = {
115         .max_x = 2240,
116         .max_y = 1120,
117         .res_x = 30, /* units/mm */
118         .res_y = 27, /* units/mm */
119         .contact_size = 5,
120         .max_contacts = 5,
121 };
122
123 static const struct asus_touchpad_info asus_t100ha_tp = {
124         .max_x = 2640,
125         .max_y = 1320,
126         .res_x = 30, /* units/mm */
127         .res_y = 29, /* units/mm */
128         .contact_size = 5,
129         .max_contacts = 5,
130 };
131
132 static const struct asus_touchpad_info asus_t200ta_tp = {
133         .max_x = 3120,
134         .max_y = 1716,
135         .res_x = 30, /* units/mm */
136         .res_y = 28, /* units/mm */
137         .contact_size = 5,
138         .max_contacts = 5,
139 };
140
141 static const struct asus_touchpad_info asus_t100chi_tp = {
142         .max_x = 2640,
143         .max_y = 1320,
144         .res_x = 31, /* units/mm */
145         .res_y = 29, /* units/mm */
146         .contact_size = 3,
147         .max_contacts = 4,
148 };
149
150 static void asus_report_contact_down(struct asus_drvdata *drvdat,
151                 int toolType, u8 *data)
152 {
153         struct input_dev *input = drvdat->input;
154         int touch_major, pressure, x, y;
155
156         x = (data[0] & CONTACT_X_MSB_MASK) << 4 | data[1];
157         y = drvdat->tp->max_y - ((data[0] & CONTACT_Y_MSB_MASK) << 8 | data[2]);
158
159         input_report_abs(input, ABS_MT_POSITION_X, x);
160         input_report_abs(input, ABS_MT_POSITION_Y, y);
161
162         if (drvdat->tp->contact_size < 5)
163                 return;
164
165         if (toolType == MT_TOOL_PALM) {
166                 touch_major = MAX_TOUCH_MAJOR;
167                 pressure = MAX_PRESSURE;
168         } else {
169                 touch_major = (data[3] >> 4) & CONTACT_TOUCH_MAJOR_MASK;
170                 pressure = data[4] & CONTACT_PRESSURE_MASK;
171         }
172
173         input_report_abs(input, ABS_MT_TOUCH_MAJOR, touch_major);
174         input_report_abs(input, ABS_MT_PRESSURE, pressure);
175 }
176
177 /* Required for Synaptics Palm Detection */
178 static void asus_report_tool_width(struct asus_drvdata *drvdat)
179 {
180         struct input_mt *mt = drvdat->input->mt;
181         struct input_mt_slot *oldest;
182         int oldid, count, i;
183
184         if (drvdat->tp->contact_size < 5)
185                 return;
186
187         oldest = NULL;
188         oldid = mt->trkid;
189         count = 0;
190
191         for (i = 0; i < mt->num_slots; ++i) {
192                 struct input_mt_slot *ps = &mt->slots[i];
193                 int id = input_mt_get_value(ps, ABS_MT_TRACKING_ID);
194
195                 if (id < 0)
196                         continue;
197                 if ((id - oldid) & TRKID_SGN) {
198                         oldest = ps;
199                         oldid = id;
200                 }
201                 count++;
202         }
203
204         if (oldest) {
205                 input_report_abs(drvdat->input, ABS_TOOL_WIDTH,
206                         input_mt_get_value(oldest, ABS_MT_TOUCH_MAJOR));
207         }
208 }
209
210 static int asus_report_input(struct asus_drvdata *drvdat, u8 *data, int size)
211 {
212         int i, toolType = MT_TOOL_FINGER;
213         u8 *contactData = data + 2;
214
215         if (size != 3 + drvdat->tp->contact_size * drvdat->tp->max_contacts)
216                 return 0;
217
218         for (i = 0; i < drvdat->tp->max_contacts; i++) {
219                 bool down = !!(data[1] & BIT(i+3));
220
221                 if (drvdat->tp->contact_size >= 5)
222                         toolType = contactData[3] & CONTACT_TOOL_TYPE_MASK ?
223                                                 MT_TOOL_PALM : MT_TOOL_FINGER;
224
225                 input_mt_slot(drvdat->input, i);
226                 input_mt_report_slot_state(drvdat->input, toolType, down);
227
228                 if (down) {
229                         asus_report_contact_down(drvdat, toolType, contactData);
230                         contactData += drvdat->tp->contact_size;
231                 }
232         }
233
234         input_report_key(drvdat->input, BTN_LEFT, data[1] & BTN_LEFT_MASK);
235         asus_report_tool_width(drvdat);
236
237         input_mt_sync_frame(drvdat->input);
238         input_sync(drvdat->input);
239
240         return 1;
241 }
242
243 static int asus_raw_event(struct hid_device *hdev,
244                 struct hid_report *report, u8 *data, int size)
245 {
246         struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
247
248         if (drvdata->tp && data[0] == INPUT_REPORT_ID)
249                 return asus_report_input(drvdata, data, size);
250
251         return 0;
252 }
253
254 static int asus_kbd_set_report(struct hid_device *hdev, u8 *buf, size_t buf_size)
255 {
256         unsigned char *dmabuf;
257         int ret;
258
259         dmabuf = kmemdup(buf, buf_size, GFP_KERNEL);
260         if (!dmabuf)
261                 return -ENOMEM;
262
263         ret = hid_hw_raw_request(hdev, FEATURE_KBD_REPORT_ID, dmabuf,
264                                  buf_size, HID_FEATURE_REPORT,
265                                  HID_REQ_SET_REPORT);
266         kfree(dmabuf);
267
268         return ret;
269 }
270
271 static int asus_kbd_init(struct hid_device *hdev)
272 {
273         u8 buf[] = { FEATURE_KBD_REPORT_ID, 0x41, 0x53, 0x55, 0x53, 0x20, 0x54,
274                      0x65, 0x63, 0x68, 0x2e, 0x49, 0x6e, 0x63, 0x2e, 0x00 };
275         int ret;
276
277         ret = asus_kbd_set_report(hdev, buf, sizeof(buf));
278         if (ret < 0)
279                 hid_err(hdev, "Asus failed to send init command: %d\n", ret);
280
281         return ret;
282 }
283
284 static int asus_kbd_get_functions(struct hid_device *hdev,
285                                   unsigned char *kbd_func)
286 {
287         u8 buf[] = { FEATURE_KBD_REPORT_ID, 0x05, 0x20, 0x31, 0x00, 0x08 };
288         u8 *readbuf;
289         int ret;
290
291         ret = asus_kbd_set_report(hdev, buf, sizeof(buf));
292         if (ret < 0) {
293                 hid_err(hdev, "Asus failed to send configuration command: %d\n", ret);
294                 return ret;
295         }
296
297         readbuf = kzalloc(FEATURE_KBD_REPORT_SIZE, GFP_KERNEL);
298         if (!readbuf)
299                 return -ENOMEM;
300
301         ret = hid_hw_raw_request(hdev, FEATURE_KBD_REPORT_ID, readbuf,
302                                  FEATURE_KBD_REPORT_SIZE, HID_FEATURE_REPORT,
303                                  HID_REQ_GET_REPORT);
304         if (ret < 0) {
305                 hid_err(hdev, "Asus failed to request functions: %d\n", ret);
306                 kfree(readbuf);
307                 return ret;
308         }
309
310         *kbd_func = readbuf[6];
311
312         kfree(readbuf);
313         return ret;
314 }
315
316 static void asus_kbd_backlight_set(struct led_classdev *led_cdev,
317                                    enum led_brightness brightness)
318 {
319         struct asus_kbd_leds *led = container_of(led_cdev, struct asus_kbd_leds,
320                                                  cdev);
321         if (led->brightness == brightness)
322                 return;
323
324         led->brightness = brightness;
325         schedule_work(&led->work);
326 }
327
328 static enum led_brightness asus_kbd_backlight_get(struct led_classdev *led_cdev)
329 {
330         struct asus_kbd_leds *led = container_of(led_cdev, struct asus_kbd_leds,
331                                                  cdev);
332
333         return led->brightness;
334 }
335
336 static void asus_kbd_backlight_work(struct work_struct *work)
337 {
338         struct asus_kbd_leds *led = container_of(work, struct asus_kbd_leds, work);
339         u8 buf[] = { FEATURE_KBD_REPORT_ID, 0xba, 0xc5, 0xc4, 0x00 };
340         int ret;
341
342         if (led->removed)
343                 return;
344
345         buf[4] = led->brightness;
346
347         ret = asus_kbd_set_report(led->hdev, buf, sizeof(buf));
348         if (ret < 0)
349                 hid_err(led->hdev, "Asus failed to set keyboard backlight: %d\n", ret);
350 }
351
352 static int asus_kbd_register_leds(struct hid_device *hdev)
353 {
354         struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
355         unsigned char kbd_func;
356         int ret;
357
358         /* Initialize keyboard */
359         ret = asus_kbd_init(hdev);
360         if (ret < 0)
361                 return ret;
362
363         /* Get keyboard functions */
364         ret = asus_kbd_get_functions(hdev, &kbd_func);
365         if (ret < 0)
366                 return ret;
367
368         /* Check for backlight support */
369         if (!(kbd_func & SUPPORT_KBD_BACKLIGHT))
370                 return -ENODEV;
371
372         drvdata->kbd_backlight = devm_kzalloc(&hdev->dev,
373                                               sizeof(struct asus_kbd_leds),
374                                               GFP_KERNEL);
375         if (!drvdata->kbd_backlight)
376                 return -ENOMEM;
377
378         drvdata->kbd_backlight->removed = false;
379         drvdata->kbd_backlight->brightness = 0;
380         drvdata->kbd_backlight->hdev = hdev;
381         drvdata->kbd_backlight->cdev.name = "asus::kbd_backlight";
382         drvdata->kbd_backlight->cdev.max_brightness = 3;
383         drvdata->kbd_backlight->cdev.brightness_set = asus_kbd_backlight_set;
384         drvdata->kbd_backlight->cdev.brightness_get = asus_kbd_backlight_get;
385         INIT_WORK(&drvdata->kbd_backlight->work, asus_kbd_backlight_work);
386
387         ret = devm_led_classdev_register(&hdev->dev, &drvdata->kbd_backlight->cdev);
388         if (ret < 0) {
389                 /* No need to have this still around */
390                 devm_kfree(&hdev->dev, drvdata->kbd_backlight);
391         }
392
393         return ret;
394 }
395
396 static int asus_input_configured(struct hid_device *hdev, struct hid_input *hi)
397 {
398         struct input_dev *input = hi->input;
399         struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
400
401         /* T100CHI uses MULTI_INPUT, bind the touchpad to the mouse hid_input */
402         if (drvdata->quirks & QUIRK_T100CHI &&
403             hi->report->id != T100CHI_MOUSE_REPORT_ID)
404                 return 0;
405
406         if (drvdata->tp) {
407                 int ret;
408
409                 input_set_abs_params(input, ABS_MT_POSITION_X, 0,
410                                      drvdata->tp->max_x, 0, 0);
411                 input_set_abs_params(input, ABS_MT_POSITION_Y, 0,
412                                      drvdata->tp->max_y, 0, 0);
413                 input_abs_set_res(input, ABS_MT_POSITION_X, drvdata->tp->res_x);
414                 input_abs_set_res(input, ABS_MT_POSITION_Y, drvdata->tp->res_y);
415
416                 if (drvdata->tp->contact_size >= 5) {
417                         input_set_abs_params(input, ABS_TOOL_WIDTH, 0,
418                                              MAX_TOUCH_MAJOR, 0, 0);
419                         input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0,
420                                              MAX_TOUCH_MAJOR, 0, 0);
421                         input_set_abs_params(input, ABS_MT_PRESSURE, 0,
422                                               MAX_PRESSURE, 0, 0);
423                 }
424
425                 __set_bit(BTN_LEFT, input->keybit);
426                 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
427
428                 ret = input_mt_init_slots(input, drvdata->tp->max_contacts,
429                                           INPUT_MT_POINTER);
430
431                 if (ret) {
432                         hid_err(hdev, "Asus input mt init slots failed: %d\n", ret);
433                         return ret;
434                 }
435         }
436
437         drvdata->input = input;
438
439         if (drvdata->enable_backlight && asus_kbd_register_leds(hdev))
440                 hid_warn(hdev, "Failed to initialize backlight.\n");
441
442         return 0;
443 }
444
445 #define asus_map_key_clear(c)   hid_map_usage_clear(hi, usage, bit, \
446                                                     max, EV_KEY, (c))
447 static int asus_input_mapping(struct hid_device *hdev,
448                 struct hid_input *hi, struct hid_field *field,
449                 struct hid_usage *usage, unsigned long **bit,
450                 int *max)
451 {
452         struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
453
454         if (drvdata->quirks & QUIRK_SKIP_INPUT_MAPPING) {
455                 /* Don't map anything from the HID report.
456                  * We do it all manually in asus_input_configured
457                  */
458                 return -1;
459         }
460
461         /*
462          * Ignore a bunch of bogus collections in the T100CHI descriptor.
463          * This avoids a bunch of non-functional hid_input devices getting
464          * created because of the T100CHI using HID_QUIRK_MULTI_INPUT.
465          */
466         if (drvdata->quirks & QUIRK_T100CHI) {
467                 if (field->application == (HID_UP_GENDESK | 0x0080) ||
468                     usage->hid == (HID_UP_GENDEVCTRLS | 0x0024) ||
469                     usage->hid == (HID_UP_GENDEVCTRLS | 0x0025) ||
470                     usage->hid == (HID_UP_GENDEVCTRLS | 0x0026))
471                         return -1;
472                 /*
473                  * We use the hid_input for the mouse report for the touchpad,
474                  * keep the left button, to avoid the core removing it.
475                  */
476                 if (field->application == HID_GD_MOUSE &&
477                     usage->hid != (HID_UP_BUTTON | 1))
478                         return -1;
479         }
480
481         /* ASUS-specific keyboard hotkeys */
482         if ((usage->hid & HID_USAGE_PAGE) == 0xff310000) {
483                 set_bit(EV_REP, hi->input->evbit);
484                 switch (usage->hid & HID_USAGE) {
485                 case 0x10: asus_map_key_clear(KEY_BRIGHTNESSDOWN);      break;
486                 case 0x20: asus_map_key_clear(KEY_BRIGHTNESSUP);                break;
487                 case 0x35: asus_map_key_clear(KEY_DISPLAY_OFF);         break;
488                 case 0x6c: asus_map_key_clear(KEY_SLEEP);               break;
489                 case 0x82: asus_map_key_clear(KEY_CAMERA);              break;
490                 case 0x88: asus_map_key_clear(KEY_RFKILL);                      break;
491                 case 0xb5: asus_map_key_clear(KEY_CALC);                        break;
492                 case 0xc4: asus_map_key_clear(KEY_KBDILLUMUP);          break;
493                 case 0xc5: asus_map_key_clear(KEY_KBDILLUMDOWN);                break;
494
495                 /* ASUS touchpad toggle */
496                 case 0x6b: asus_map_key_clear(KEY_F21);                 break;
497
498                 /* ROG key */
499                 case 0x38: asus_map_key_clear(KEY_PROG1);               break;
500
501                 /* Fn+C ASUS Splendid */
502                 case 0xba: asus_map_key_clear(KEY_PROG2);               break;
503
504                 /* Fn+Space Power4Gear Hybrid */
505                 case 0x5c: asus_map_key_clear(KEY_PROG3);               break;
506
507                 default:
508                         /* ASUS lazily declares 256 usages, ignore the rest,
509                          * as some make the keyboard appear as a pointer device. */
510                         return -1;
511                 }
512
513                 /*
514                  * Check and enable backlight only on devices with UsagePage ==
515                  * 0xff31 to avoid initializing the keyboard firmware multiple
516                  * times on devices with multiple HID descriptors but same
517                  * PID/VID.
518                  */
519                 if (drvdata->quirks & QUIRK_USE_KBD_BACKLIGHT)
520                         drvdata->enable_backlight = true;
521
522                 return 1;
523         }
524
525         if ((usage->hid & HID_USAGE_PAGE) == HID_UP_MSVENDOR) {
526                 set_bit(EV_REP, hi->input->evbit);
527                 switch (usage->hid & HID_USAGE) {
528                 case 0xff01: asus_map_key_clear(BTN_1); break;
529                 case 0xff02: asus_map_key_clear(BTN_2); break;
530                 case 0xff03: asus_map_key_clear(BTN_3); break;
531                 case 0xff04: asus_map_key_clear(BTN_4); break;
532                 case 0xff05: asus_map_key_clear(BTN_5); break;
533                 case 0xff06: asus_map_key_clear(BTN_6); break;
534                 case 0xff07: asus_map_key_clear(BTN_7); break;
535                 case 0xff08: asus_map_key_clear(BTN_8); break;
536                 case 0xff09: asus_map_key_clear(BTN_9); break;
537                 case 0xff0a: asus_map_key_clear(BTN_A); break;
538                 case 0xff0b: asus_map_key_clear(BTN_B); break;
539                 case 0x00f1: asus_map_key_clear(KEY_WLAN);      break;
540                 case 0x00f2: asus_map_key_clear(KEY_BRIGHTNESSDOWN);    break;
541                 case 0x00f3: asus_map_key_clear(KEY_BRIGHTNESSUP);      break;
542                 case 0x00f4: asus_map_key_clear(KEY_DISPLAY_OFF);       break;
543                 case 0x00f7: asus_map_key_clear(KEY_CAMERA);    break;
544                 case 0x00f8: asus_map_key_clear(KEY_PROG1);     break;
545                 default:
546                         return 0;
547                 }
548
549                 return 1;
550         }
551
552         if (drvdata->quirks & QUIRK_NO_CONSUMER_USAGES &&
553                 (usage->hid & HID_USAGE_PAGE) == HID_UP_CONSUMER) {
554                 switch (usage->hid & HID_USAGE) {
555                 case 0xe2: /* Mute */
556                 case 0xe9: /* Volume up */
557                 case 0xea: /* Volume down */
558                         return 0;
559                 default:
560                         /* Ignore dummy Consumer usages which make the
561                          * keyboard incorrectly appear as a pointer device.
562                          */
563                         return -1;
564                 }
565         }
566
567         return 0;
568 }
569
570 static int asus_start_multitouch(struct hid_device *hdev)
571 {
572         int ret;
573         const unsigned char buf[] = { FEATURE_REPORT_ID, 0x00, 0x03, 0x01, 0x00 };
574         unsigned char *dmabuf = kmemdup(buf, sizeof(buf), GFP_KERNEL);
575
576         if (!dmabuf) {
577                 ret = -ENOMEM;
578                 hid_err(hdev, "Asus failed to alloc dma buf: %d\n", ret);
579                 return ret;
580         }
581
582         ret = hid_hw_raw_request(hdev, dmabuf[0], dmabuf, sizeof(buf),
583                                         HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
584
585         kfree(dmabuf);
586
587         if (ret != sizeof(buf)) {
588                 hid_err(hdev, "Asus failed to start multitouch: %d\n", ret);
589                 return ret;
590         }
591
592         return 0;
593 }
594
595 static int __maybe_unused asus_reset_resume(struct hid_device *hdev)
596 {
597         struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
598
599         if (drvdata->tp)
600                 return asus_start_multitouch(hdev);
601
602         return 0;
603 }
604
605 static int asus_probe(struct hid_device *hdev, const struct hid_device_id *id)
606 {
607         int ret;
608         struct asus_drvdata *drvdata;
609
610         drvdata = devm_kzalloc(&hdev->dev, sizeof(*drvdata), GFP_KERNEL);
611         if (drvdata == NULL) {
612                 hid_err(hdev, "Can't alloc Asus descriptor\n");
613                 return -ENOMEM;
614         }
615
616         hid_set_drvdata(hdev, drvdata);
617
618         drvdata->quirks = id->driver_data;
619
620         if (drvdata->quirks & QUIRK_IS_MULTITOUCH)
621                 drvdata->tp = &asus_i2c_tp;
622
623         if (drvdata->quirks & QUIRK_T100_KEYBOARD) {
624                 struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
625
626                 if (intf->altsetting->desc.bInterfaceNumber == T100_TPAD_INTF) {
627                         drvdata->quirks = QUIRK_SKIP_INPUT_MAPPING;
628                         /*
629                          * The T100HA uses the same USB-ids as the T100TAF and
630                          * the T200TA uses the same USB-ids as the T100TA, while
631                          * both have different max x/y values as the T100TA[F].
632                          */
633                         if (dmi_match(DMI_PRODUCT_NAME, "T100HAN"))
634                                 drvdata->tp = &asus_t100ha_tp;
635                         else if (dmi_match(DMI_PRODUCT_NAME, "T200TA"))
636                                 drvdata->tp = &asus_t200ta_tp;
637                         else
638                                 drvdata->tp = &asus_t100ta_tp;
639                 }
640         }
641
642         if (drvdata->quirks & QUIRK_T100CHI) {
643                 /*
644                  * All functionality is on a single HID interface and for
645                  * userspace the touchpad must be a separate input_dev.
646                  */
647                 hdev->quirks |= HID_QUIRK_MULTI_INPUT |
648                                 HID_QUIRK_NO_EMPTY_INPUT;
649                 drvdata->tp = &asus_t100chi_tp;
650         }
651
652         if (drvdata->quirks & QUIRK_NO_INIT_REPORTS)
653                 hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
654
655         ret = hid_parse(hdev);
656         if (ret) {
657                 hid_err(hdev, "Asus hid parse failed: %d\n", ret);
658                 return ret;
659         }
660
661         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
662         if (ret) {
663                 hid_err(hdev, "Asus hw start failed: %d\n", ret);
664                 return ret;
665         }
666
667         if (!drvdata->input) {
668                 hid_err(hdev, "Asus input not registered\n");
669                 ret = -ENOMEM;
670                 goto err_stop_hw;
671         }
672
673         if (drvdata->tp) {
674                 drvdata->input->name = "Asus TouchPad";
675         } else {
676                 drvdata->input->name = "Asus Keyboard";
677         }
678
679         if (drvdata->tp) {
680                 ret = asus_start_multitouch(hdev);
681                 if (ret)
682                         goto err_stop_hw;
683         }
684
685         return 0;
686 err_stop_hw:
687         hid_hw_stop(hdev);
688         return ret;
689 }
690
691 static void asus_remove(struct hid_device *hdev)
692 {
693         struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
694
695         if (drvdata->kbd_backlight) {
696                 drvdata->kbd_backlight->removed = true;
697                 cancel_work_sync(&drvdata->kbd_backlight->work);
698         }
699
700         hid_hw_stop(hdev);
701 }
702
703 static const __u8 asus_g752_fixed_rdesc[] = {
704         0x19, 0x00,                     /*   Usage Minimum (0x00)       */
705         0x2A, 0xFF, 0x00,               /*   Usage Maximum (0xFF)       */
706 };
707
708 static __u8 *asus_report_fixup(struct hid_device *hdev, __u8 *rdesc,
709                 unsigned int *rsize)
710 {
711         struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
712
713         if (drvdata->quirks & QUIRK_FIX_NOTEBOOK_REPORT &&
714                         *rsize >= 56 && rdesc[54] == 0x25 && rdesc[55] == 0x65) {
715                 hid_info(hdev, "Fixing up Asus notebook report descriptor\n");
716                 rdesc[55] = 0xdd;
717         }
718         /* For the T100TA/T200TA keyboard dock */
719         if (drvdata->quirks & QUIRK_T100_KEYBOARD &&
720                  (*rsize == 76 || *rsize == 101) &&
721                  rdesc[73] == 0x81 && rdesc[74] == 0x01) {
722                 hid_info(hdev, "Fixing up Asus T100 keyb report descriptor\n");
723                 rdesc[74] &= ~HID_MAIN_ITEM_CONSTANT;
724         }
725         /* For the T100CHI keyboard dock */
726         if (drvdata->quirks & QUIRK_T100CHI &&
727                  *rsize == 403 && rdesc[388] == 0x09 && rdesc[389] == 0x76) {
728                 /*
729                  * Change Usage (76h) to Usage Minimum (00h), Usage Maximum
730                  * (FFh) and clear the flags in the Input() byte.
731                  * Note the descriptor has a bogus 0 byte at the end so we
732                  * only need 1 extra byte.
733                  */
734                 *rsize = 404;
735                 rdesc = kmemdup(rdesc, *rsize, GFP_KERNEL);
736                 if (!rdesc)
737                         return NULL;
738
739                 hid_info(hdev, "Fixing up T100CHI keyb report descriptor\n");
740                 memmove(rdesc + 392, rdesc + 390, 12);
741                 rdesc[388] = 0x19;
742                 rdesc[389] = 0x00;
743                 rdesc[390] = 0x29;
744                 rdesc[391] = 0xff;
745                 rdesc[402] = 0x00;
746         }
747         if (drvdata->quirks & QUIRK_G752_KEYBOARD &&
748                  *rsize == 75 && rdesc[61] == 0x15 && rdesc[62] == 0x00) {
749                 /* report is missing usage mninum and maximum */
750                 __u8 *new_rdesc;
751                 size_t new_size = *rsize + sizeof(asus_g752_fixed_rdesc);
752
753                 new_rdesc = devm_kzalloc(&hdev->dev, new_size, GFP_KERNEL);
754                 if (new_rdesc == NULL)
755                         return rdesc;
756
757                 hid_info(hdev, "Fixing up Asus G752 keyb report descriptor\n");
758                 /* copy the valid part */
759                 memcpy(new_rdesc, rdesc, 61);
760                 /* insert missing part */
761                 memcpy(new_rdesc + 61, asus_g752_fixed_rdesc, sizeof(asus_g752_fixed_rdesc));
762                 /* copy remaining data */
763                 memcpy(new_rdesc + 61 + sizeof(asus_g752_fixed_rdesc), rdesc + 61, *rsize - 61);
764
765                 *rsize = new_size;
766                 rdesc = new_rdesc;
767         }
768
769         return rdesc;
770 }
771
772 static const struct hid_device_id asus_devices[] = {
773         { HID_I2C_DEVICE(USB_VENDOR_ID_ASUSTEK,
774                 USB_DEVICE_ID_ASUSTEK_I2C_KEYBOARD), I2C_KEYBOARD_QUIRKS},
775         { HID_I2C_DEVICE(USB_VENDOR_ID_ASUSTEK,
776                 USB_DEVICE_ID_ASUSTEK_I2C_TOUCHPAD), I2C_TOUCHPAD_QUIRKS },
777         { HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK,
778                 USB_DEVICE_ID_ASUSTEK_ROG_KEYBOARD1), QUIRK_USE_KBD_BACKLIGHT },
779         { HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK,
780                 USB_DEVICE_ID_ASUSTEK_ROG_KEYBOARD2), QUIRK_USE_KBD_BACKLIGHT },
781         { HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK,
782                 USB_DEVICE_ID_ASUSTEK_ROG_KEYBOARD3), QUIRK_G752_KEYBOARD },
783         { HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK,
784                 USB_DEVICE_ID_ASUSTEK_T100TA_KEYBOARD),
785           QUIRK_T100_KEYBOARD | QUIRK_NO_CONSUMER_USAGES },
786         { HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK,
787                 USB_DEVICE_ID_ASUSTEK_T100TAF_KEYBOARD),
788           QUIRK_T100_KEYBOARD | QUIRK_NO_CONSUMER_USAGES },
789         { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_ASUS_AK1D) },
790         { HID_USB_DEVICE(USB_VENDOR_ID_TURBOX, USB_DEVICE_ID_ASUS_MD_5110) },
791         { HID_USB_DEVICE(USB_VENDOR_ID_JESS, USB_DEVICE_ID_ASUS_MD_5112) },
792         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ASUSTEK,
793                 USB_DEVICE_ID_ASUSTEK_T100CHI_KEYBOARD), QUIRK_T100CHI },
794
795         { }
796 };
797 MODULE_DEVICE_TABLE(hid, asus_devices);
798
799 static struct hid_driver asus_driver = {
800         .name                   = "asus",
801         .id_table               = asus_devices,
802         .report_fixup           = asus_report_fixup,
803         .probe                  = asus_probe,
804         .remove                 = asus_remove,
805         .input_mapping          = asus_input_mapping,
806         .input_configured       = asus_input_configured,
807 #ifdef CONFIG_PM
808         .reset_resume           = asus_reset_resume,
809 #endif
810         .raw_event              = asus_raw_event
811 };
812 module_hid_driver(asus_driver);
813
814 MODULE_LICENSE("GPL");