xref: /linux/drivers/hid/hid-asus.c (revision 4359a011e259a4608afc7fb3635370c9d4ba5943)
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  *  HID driver for Asus notebook built-in keyboard.
4  *  Fixes small logical maximum to match usage maximum.
5  *
6  *  Currently supported devices are:
7  *    EeeBook X205TA
8  *    VivoBook E200HA
9  *
10  *  Copyright (c) 2016 Yusuke Fujimaki <usk.fujimaki@gmail.com>
11  *
12  *  This module based on hid-ortek by
13  *  Copyright (c) 2010 Johnathon Harris <jmharris@gmail.com>
14  *  Copyright (c) 2011 Jiri Kosina
15  *
16  *  This module has been updated to add support for Asus i2c touchpad.
17  *
18  *  Copyright (c) 2016 Brendan McGrath <redmcg@redmandi.dyndns.org>
19  *  Copyright (c) 2016 Victor Vlasenko <victor.vlasenko@sysgears.com>
20  *  Copyright (c) 2016 Frederik Wenigwieser <frederik.wenigwieser@gmail.com>
21  */
22 
23 /*
24  */
25 
26 #include <linux/dmi.h>
27 #include <linux/hid.h>
28 #include <linux/module.h>
29 #include <linux/platform_data/x86/asus-wmi.h>
30 #include <linux/input/mt.h>
31 #include <linux/usb.h> /* For to_usb_interface for T100 touchpad intf check */
32 #include <linux/power_supply.h>
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 #define MEDION_E1239T_TPAD_INTF 1
44 
45 #define E1239T_TP_TOGGLE_REPORT_ID 0x05
46 #define T100CHI_MOUSE_REPORT_ID 0x06
47 #define FEATURE_REPORT_ID 0x0d
48 #define INPUT_REPORT_ID 0x5d
49 #define FEATURE_KBD_REPORT_ID 0x5a
50 #define FEATURE_KBD_REPORT_SIZE 16
51 #define FEATURE_KBD_LED_REPORT_ID1 0x5d
52 #define FEATURE_KBD_LED_REPORT_ID2 0x5e
53 
54 #define SUPPORT_KBD_BACKLIGHT BIT(0)
55 
56 #define MAX_TOUCH_MAJOR 8
57 #define MAX_PRESSURE 128
58 
59 #define BTN_LEFT_MASK 0x01
60 #define CONTACT_TOOL_TYPE_MASK 0x80
61 #define CONTACT_X_MSB_MASK 0xf0
62 #define CONTACT_Y_MSB_MASK 0x0f
63 #define CONTACT_TOUCH_MAJOR_MASK 0x07
64 #define CONTACT_PRESSURE_MASK 0x7f
65 
66 #define	BATTERY_REPORT_ID	(0x03)
67 #define	BATTERY_REPORT_SIZE	(1 + 8)
68 #define	BATTERY_LEVEL_MAX	((u8)255)
69 #define	BATTERY_STAT_DISCONNECT	(0)
70 #define	BATTERY_STAT_CHARGING	(1)
71 #define	BATTERY_STAT_FULL	(2)
72 
73 #define QUIRK_FIX_NOTEBOOK_REPORT	BIT(0)
74 #define QUIRK_NO_INIT_REPORTS		BIT(1)
75 #define QUIRK_SKIP_INPUT_MAPPING	BIT(2)
76 #define QUIRK_IS_MULTITOUCH		BIT(3)
77 #define QUIRK_NO_CONSUMER_USAGES	BIT(4)
78 #define QUIRK_USE_KBD_BACKLIGHT		BIT(5)
79 #define QUIRK_T100_KEYBOARD		BIT(6)
80 #define QUIRK_T100CHI			BIT(7)
81 #define QUIRK_G752_KEYBOARD		BIT(8)
82 #define QUIRK_T90CHI			BIT(9)
83 #define QUIRK_MEDION_E1239T		BIT(10)
84 #define QUIRK_ROG_NKEY_KEYBOARD		BIT(11)
85 #define QUIRK_ROG_CLAYMORE_II_KEYBOARD BIT(12)
86 
87 #define I2C_KEYBOARD_QUIRKS			(QUIRK_FIX_NOTEBOOK_REPORT | \
88 						 QUIRK_NO_INIT_REPORTS | \
89 						 QUIRK_NO_CONSUMER_USAGES)
90 #define I2C_TOUCHPAD_QUIRKS			(QUIRK_NO_INIT_REPORTS | \
91 						 QUIRK_SKIP_INPUT_MAPPING | \
92 						 QUIRK_IS_MULTITOUCH)
93 
94 #define TRKID_SGN       ((TRKID_MAX + 1) >> 1)
95 
96 struct asus_kbd_leds {
97 	struct led_classdev cdev;
98 	struct hid_device *hdev;
99 	struct work_struct work;
100 	unsigned int brightness;
101 	bool removed;
102 };
103 
104 struct asus_touchpad_info {
105 	int max_x;
106 	int max_y;
107 	int res_x;
108 	int res_y;
109 	int contact_size;
110 	int max_contacts;
111 	int report_size;
112 };
113 
114 struct asus_drvdata {
115 	unsigned long quirks;
116 	struct hid_device *hdev;
117 	struct input_dev *input;
118 	struct input_dev *tp_kbd_input;
119 	struct asus_kbd_leds *kbd_backlight;
120 	const struct asus_touchpad_info *tp;
121 	bool enable_backlight;
122 	struct power_supply *battery;
123 	struct power_supply_desc battery_desc;
124 	int battery_capacity;
125 	int battery_stat;
126 	bool battery_in_query;
127 	unsigned long battery_next_query;
128 };
129 
130 static int asus_report_battery(struct asus_drvdata *, u8 *, int);
131 
132 static const struct asus_touchpad_info asus_i2c_tp = {
133 	.max_x = 2794,
134 	.max_y = 1758,
135 	.contact_size = 5,
136 	.max_contacts = 5,
137 	.report_size = 28 /* 2 byte header + 5 * 5 + 1 byte footer */,
138 };
139 
140 static const struct asus_touchpad_info asus_t100ta_tp = {
141 	.max_x = 2240,
142 	.max_y = 1120,
143 	.res_x = 30, /* units/mm */
144 	.res_y = 27, /* units/mm */
145 	.contact_size = 5,
146 	.max_contacts = 5,
147 	.report_size = 28 /* 2 byte header + 5 * 5 + 1 byte footer */,
148 };
149 
150 static const struct asus_touchpad_info asus_t100ha_tp = {
151 	.max_x = 2640,
152 	.max_y = 1320,
153 	.res_x = 30, /* units/mm */
154 	.res_y = 29, /* units/mm */
155 	.contact_size = 5,
156 	.max_contacts = 5,
157 	.report_size = 28 /* 2 byte header + 5 * 5 + 1 byte footer */,
158 };
159 
160 static const struct asus_touchpad_info asus_t200ta_tp = {
161 	.max_x = 3120,
162 	.max_y = 1716,
163 	.res_x = 30, /* units/mm */
164 	.res_y = 28, /* units/mm */
165 	.contact_size = 5,
166 	.max_contacts = 5,
167 	.report_size = 28 /* 2 byte header + 5 * 5 + 1 byte footer */,
168 };
169 
170 static const struct asus_touchpad_info asus_t100chi_tp = {
171 	.max_x = 2640,
172 	.max_y = 1320,
173 	.res_x = 31, /* units/mm */
174 	.res_y = 29, /* units/mm */
175 	.contact_size = 3,
176 	.max_contacts = 4,
177 	.report_size = 15 /* 2 byte header + 3 * 4 + 1 byte footer */,
178 };
179 
180 static const struct asus_touchpad_info medion_e1239t_tp = {
181 	.max_x = 2640,
182 	.max_y = 1380,
183 	.res_x = 29, /* units/mm */
184 	.res_y = 28, /* units/mm */
185 	.contact_size = 5,
186 	.max_contacts = 5,
187 	.report_size = 32 /* 2 byte header + 5 * 5 + 5 byte footer */,
188 };
189 
190 static void asus_report_contact_down(struct asus_drvdata *drvdat,
191 		int toolType, u8 *data)
192 {
193 	struct input_dev *input = drvdat->input;
194 	int touch_major, pressure, x, y;
195 
196 	x = (data[0] & CONTACT_X_MSB_MASK) << 4 | data[1];
197 	y = drvdat->tp->max_y - ((data[0] & CONTACT_Y_MSB_MASK) << 8 | data[2]);
198 
199 	input_report_abs(input, ABS_MT_POSITION_X, x);
200 	input_report_abs(input, ABS_MT_POSITION_Y, y);
201 
202 	if (drvdat->tp->contact_size < 5)
203 		return;
204 
205 	if (toolType == MT_TOOL_PALM) {
206 		touch_major = MAX_TOUCH_MAJOR;
207 		pressure = MAX_PRESSURE;
208 	} else {
209 		touch_major = (data[3] >> 4) & CONTACT_TOUCH_MAJOR_MASK;
210 		pressure = data[4] & CONTACT_PRESSURE_MASK;
211 	}
212 
213 	input_report_abs(input, ABS_MT_TOUCH_MAJOR, touch_major);
214 	input_report_abs(input, ABS_MT_PRESSURE, pressure);
215 }
216 
217 /* Required for Synaptics Palm Detection */
218 static void asus_report_tool_width(struct asus_drvdata *drvdat)
219 {
220 	struct input_mt *mt = drvdat->input->mt;
221 	struct input_mt_slot *oldest;
222 	int oldid, count, i;
223 
224 	if (drvdat->tp->contact_size < 5)
225 		return;
226 
227 	oldest = NULL;
228 	oldid = mt->trkid;
229 	count = 0;
230 
231 	for (i = 0; i < mt->num_slots; ++i) {
232 		struct input_mt_slot *ps = &mt->slots[i];
233 		int id = input_mt_get_value(ps, ABS_MT_TRACKING_ID);
234 
235 		if (id < 0)
236 			continue;
237 		if ((id - oldid) & TRKID_SGN) {
238 			oldest = ps;
239 			oldid = id;
240 		}
241 		count++;
242 	}
243 
244 	if (oldest) {
245 		input_report_abs(drvdat->input, ABS_TOOL_WIDTH,
246 			input_mt_get_value(oldest, ABS_MT_TOUCH_MAJOR));
247 	}
248 }
249 
250 static int asus_report_input(struct asus_drvdata *drvdat, u8 *data, int size)
251 {
252 	int i, toolType = MT_TOOL_FINGER;
253 	u8 *contactData = data + 2;
254 
255 	if (size != drvdat->tp->report_size)
256 		return 0;
257 
258 	for (i = 0; i < drvdat->tp->max_contacts; i++) {
259 		bool down = !!(data[1] & BIT(i+3));
260 
261 		if (drvdat->tp->contact_size >= 5)
262 			toolType = contactData[3] & CONTACT_TOOL_TYPE_MASK ?
263 						MT_TOOL_PALM : MT_TOOL_FINGER;
264 
265 		input_mt_slot(drvdat->input, i);
266 		input_mt_report_slot_state(drvdat->input, toolType, down);
267 
268 		if (down) {
269 			asus_report_contact_down(drvdat, toolType, contactData);
270 			contactData += drvdat->tp->contact_size;
271 		}
272 	}
273 
274 	input_report_key(drvdat->input, BTN_LEFT, data[1] & BTN_LEFT_MASK);
275 	asus_report_tool_width(drvdat);
276 
277 	input_mt_sync_frame(drvdat->input);
278 	input_sync(drvdat->input);
279 
280 	return 1;
281 }
282 
283 static int asus_e1239t_event(struct asus_drvdata *drvdat, u8 *data, int size)
284 {
285 	if (size != 3)
286 		return 0;
287 
288 	/* Handle broken mute key which only sends press events */
289 	if (!drvdat->tp &&
290 	    data[0] == 0x02 && data[1] == 0xe2 && data[2] == 0x00) {
291 		input_report_key(drvdat->input, KEY_MUTE, 1);
292 		input_sync(drvdat->input);
293 		input_report_key(drvdat->input, KEY_MUTE, 0);
294 		input_sync(drvdat->input);
295 		return 1;
296 	}
297 
298 	/* Handle custom touchpad toggle key which only sends press events */
299 	if (drvdat->tp_kbd_input &&
300 	    data[0] == 0x05 && data[1] == 0x02 && data[2] == 0x28) {
301 		input_report_key(drvdat->tp_kbd_input, KEY_F21, 1);
302 		input_sync(drvdat->tp_kbd_input);
303 		input_report_key(drvdat->tp_kbd_input, KEY_F21, 0);
304 		input_sync(drvdat->tp_kbd_input);
305 		return 1;
306 	}
307 
308 	return 0;
309 }
310 
311 static int asus_event(struct hid_device *hdev, struct hid_field *field,
312 		      struct hid_usage *usage, __s32 value)
313 {
314 	if ((usage->hid & HID_USAGE_PAGE) == 0xff310000 &&
315 	    (usage->hid & HID_USAGE) != 0x00 &&
316 	    (usage->hid & HID_USAGE) != 0xff && !usage->type) {
317 		hid_warn(hdev, "Unmapped Asus vendor usagepage code 0x%02x\n",
318 			 usage->hid & HID_USAGE);
319 	}
320 
321 	return 0;
322 }
323 
324 static int asus_raw_event(struct hid_device *hdev,
325 		struct hid_report *report, u8 *data, int size)
326 {
327 	struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
328 
329 	if (drvdata->battery && data[0] == BATTERY_REPORT_ID)
330 		return asus_report_battery(drvdata, data, size);
331 
332 	if (drvdata->tp && data[0] == INPUT_REPORT_ID)
333 		return asus_report_input(drvdata, data, size);
334 
335 	if (drvdata->quirks & QUIRK_MEDION_E1239T)
336 		return asus_e1239t_event(drvdata, data, size);
337 
338 	if (drvdata->quirks & QUIRK_USE_KBD_BACKLIGHT) {
339 		/*
340 		 * Skip these report ID, the device emits a continuous stream associated
341 		 * with the AURA mode it is in which looks like an 'echo'.
342 		*/
343 		if (report->id == FEATURE_KBD_LED_REPORT_ID1 ||
344 				report->id == FEATURE_KBD_LED_REPORT_ID2) {
345 			return -1;
346 		/* Additional report filtering */
347 		} else if (report->id == FEATURE_KBD_REPORT_ID) {
348 			/*
349 			 * G14 and G15 send these codes on some keypresses with no
350 			 * discernable reason for doing so. We'll filter them out to avoid
351 			 * unmapped warning messages later.
352 			*/
353 			if (data[1] == 0xea || data[1] == 0xec || data[1] == 0x02 ||
354 					data[1] == 0x8a || data[1] == 0x9e) {
355 				return -1;
356 			}
357 		}
358 		if (drvdata->quirks & QUIRK_ROG_NKEY_KEYBOARD) {
359 			/*
360 			 * G713 and G733 send these codes on some keypresses, depending on
361 			 * the key pressed it can trigger a shutdown event if not caught.
362 			*/
363 			if(data[0] == 0x02 && data[1] == 0x30) {
364 				return -1;
365 			}
366 		}
367 
368 	}
369 
370 	if (drvdata->quirks & QUIRK_ROG_CLAYMORE_II_KEYBOARD) {
371 		/*
372 		 * CLAYMORE II keyboard sends this packet when it goes to sleep
373 		 * this causes the whole system to go into suspend.
374 		*/
375 
376 		if(size == 2 && data[0] == 0x02 && data[1] == 0x00) {
377 			return -1;
378 		}
379 	}
380 
381 	return 0;
382 }
383 
384 static int asus_kbd_set_report(struct hid_device *hdev, u8 *buf, size_t buf_size)
385 {
386 	unsigned char *dmabuf;
387 	int ret;
388 
389 	dmabuf = kmemdup(buf, buf_size, GFP_KERNEL);
390 	if (!dmabuf)
391 		return -ENOMEM;
392 
393 	/*
394 	 * The report ID should be set from the incoming buffer due to LED and key
395 	 * interfaces having different pages
396 	*/
397 	ret = hid_hw_raw_request(hdev, buf[0], dmabuf,
398 				 buf_size, HID_FEATURE_REPORT,
399 				 HID_REQ_SET_REPORT);
400 	kfree(dmabuf);
401 
402 	return ret;
403 }
404 
405 static int asus_kbd_init(struct hid_device *hdev)
406 {
407 	u8 buf[] = { FEATURE_KBD_REPORT_ID, 0x41, 0x53, 0x55, 0x53, 0x20, 0x54,
408 		     0x65, 0x63, 0x68, 0x2e, 0x49, 0x6e, 0x63, 0x2e, 0x00 };
409 	int ret;
410 
411 	ret = asus_kbd_set_report(hdev, buf, sizeof(buf));
412 	if (ret < 0)
413 		hid_err(hdev, "Asus failed to send init command: %d\n", ret);
414 
415 	return ret;
416 }
417 
418 static int asus_kbd_get_functions(struct hid_device *hdev,
419 				  unsigned char *kbd_func)
420 {
421 	u8 buf[] = { FEATURE_KBD_REPORT_ID, 0x05, 0x20, 0x31, 0x00, 0x08 };
422 	u8 *readbuf;
423 	int ret;
424 
425 	ret = asus_kbd_set_report(hdev, buf, sizeof(buf));
426 	if (ret < 0) {
427 		hid_err(hdev, "Asus failed to send configuration command: %d\n", ret);
428 		return ret;
429 	}
430 
431 	readbuf = kzalloc(FEATURE_KBD_REPORT_SIZE, GFP_KERNEL);
432 	if (!readbuf)
433 		return -ENOMEM;
434 
435 	ret = hid_hw_raw_request(hdev, FEATURE_KBD_REPORT_ID, readbuf,
436 				 FEATURE_KBD_REPORT_SIZE, HID_FEATURE_REPORT,
437 				 HID_REQ_GET_REPORT);
438 	if (ret < 0) {
439 		hid_err(hdev, "Asus failed to request functions: %d\n", ret);
440 		kfree(readbuf);
441 		return ret;
442 	}
443 
444 	*kbd_func = readbuf[6];
445 
446 	kfree(readbuf);
447 	return ret;
448 }
449 
450 static int rog_nkey_led_init(struct hid_device *hdev)
451 {
452 	u8 buf_init_start[] = { FEATURE_KBD_LED_REPORT_ID1, 0xB9 };
453 	u8 buf_init2[] = { FEATURE_KBD_LED_REPORT_ID1, 0x41, 0x53, 0x55, 0x53, 0x20,
454 				0x54, 0x65, 0x63, 0x68, 0x2e, 0x49, 0x6e, 0x63, 0x2e, 0x00 };
455 	u8 buf_init3[] = { FEATURE_KBD_LED_REPORT_ID1,
456 						0x05, 0x20, 0x31, 0x00, 0x08 };
457 	int ret;
458 
459 	hid_info(hdev, "Asus initialise N-KEY Device");
460 	/* The first message is an init start */
461 	ret = asus_kbd_set_report(hdev, buf_init_start, sizeof(buf_init_start));
462 	if (ret < 0) {
463 		hid_warn(hdev, "Asus failed to send init start command: %d\n", ret);
464 		return ret;
465 	}
466 	/* Followed by a string */
467 	ret = asus_kbd_set_report(hdev, buf_init2, sizeof(buf_init2));
468 	if (ret < 0) {
469 		hid_warn(hdev, "Asus failed to send init command 1.0: %d\n", ret);
470 		return ret;
471 	}
472 	/* Followed by a string */
473 	ret = asus_kbd_set_report(hdev, buf_init3, sizeof(buf_init3));
474 	if (ret < 0) {
475 		hid_warn(hdev, "Asus failed to send init command 1.1: %d\n", ret);
476 		return ret;
477 	}
478 
479 	/* begin second report ID with same data */
480 	buf_init2[0] = FEATURE_KBD_LED_REPORT_ID2;
481 	buf_init3[0] = FEATURE_KBD_LED_REPORT_ID2;
482 
483 	ret = asus_kbd_set_report(hdev, buf_init2, sizeof(buf_init2));
484 	if (ret < 0) {
485 		hid_warn(hdev, "Asus failed to send init command 2.0: %d\n", ret);
486 		return ret;
487 	}
488 	ret = asus_kbd_set_report(hdev, buf_init3, sizeof(buf_init3));
489 	if (ret < 0)
490 		hid_warn(hdev, "Asus failed to send init command 2.1: %d\n", ret);
491 
492 	return ret;
493 }
494 
495 static void asus_kbd_backlight_set(struct led_classdev *led_cdev,
496 				   enum led_brightness brightness)
497 {
498 	struct asus_kbd_leds *led = container_of(led_cdev, struct asus_kbd_leds,
499 						 cdev);
500 	led->brightness = brightness;
501 	schedule_work(&led->work);
502 }
503 
504 static enum led_brightness asus_kbd_backlight_get(struct led_classdev *led_cdev)
505 {
506 	struct asus_kbd_leds *led = container_of(led_cdev, struct asus_kbd_leds,
507 						 cdev);
508 
509 	return led->brightness;
510 }
511 
512 static void asus_kbd_backlight_work(struct work_struct *work)
513 {
514 	struct asus_kbd_leds *led = container_of(work, struct asus_kbd_leds, work);
515 	u8 buf[] = { FEATURE_KBD_REPORT_ID, 0xba, 0xc5, 0xc4, 0x00 };
516 	int ret;
517 
518 	if (led->removed)
519 		return;
520 
521 	buf[4] = led->brightness;
522 
523 	ret = asus_kbd_set_report(led->hdev, buf, sizeof(buf));
524 	if (ret < 0)
525 		hid_err(led->hdev, "Asus failed to set keyboard backlight: %d\n", ret);
526 }
527 
528 /* WMI-based keyboard backlight LED control (via asus-wmi driver) takes
529  * precedence. We only activate HID-based backlight control when the
530  * WMI control is not available.
531  */
532 static bool asus_kbd_wmi_led_control_present(struct hid_device *hdev)
533 {
534 	u32 value;
535 	int ret;
536 
537 	if (!IS_ENABLED(CONFIG_ASUS_WMI))
538 		return false;
539 
540 	ret = asus_wmi_evaluate_method(ASUS_WMI_METHODID_DSTS,
541 				       ASUS_WMI_DEVID_KBD_BACKLIGHT, 0, &value);
542 	hid_dbg(hdev, "WMI backlight check: rc %d value %x", ret, value);
543 	if (ret)
544 		return false;
545 
546 	return !!(value & ASUS_WMI_DSTS_PRESENCE_BIT);
547 }
548 
549 static int asus_kbd_register_leds(struct hid_device *hdev)
550 {
551 	struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
552 	unsigned char kbd_func;
553 	int ret;
554 
555 	if (drvdata->quirks & QUIRK_ROG_NKEY_KEYBOARD) {
556 		ret = rog_nkey_led_init(hdev);
557 		if (ret < 0)
558 			return ret;
559 	} else {
560 		/* Initialize keyboard */
561 		ret = asus_kbd_init(hdev);
562 		if (ret < 0)
563 			return ret;
564 
565 		/* Get keyboard functions */
566 		ret = asus_kbd_get_functions(hdev, &kbd_func);
567 		if (ret < 0)
568 			return ret;
569 
570 		/* Check for backlight support */
571 		if (!(kbd_func & SUPPORT_KBD_BACKLIGHT))
572 			return -ENODEV;
573 	}
574 
575 	drvdata->kbd_backlight = devm_kzalloc(&hdev->dev,
576 					      sizeof(struct asus_kbd_leds),
577 					      GFP_KERNEL);
578 	if (!drvdata->kbd_backlight)
579 		return -ENOMEM;
580 
581 	drvdata->kbd_backlight->removed = false;
582 	drvdata->kbd_backlight->brightness = 0;
583 	drvdata->kbd_backlight->hdev = hdev;
584 	drvdata->kbd_backlight->cdev.name = "asus::kbd_backlight";
585 	drvdata->kbd_backlight->cdev.max_brightness = 3;
586 	drvdata->kbd_backlight->cdev.brightness_set = asus_kbd_backlight_set;
587 	drvdata->kbd_backlight->cdev.brightness_get = asus_kbd_backlight_get;
588 	INIT_WORK(&drvdata->kbd_backlight->work, asus_kbd_backlight_work);
589 
590 	ret = devm_led_classdev_register(&hdev->dev, &drvdata->kbd_backlight->cdev);
591 	if (ret < 0) {
592 		/* No need to have this still around */
593 		devm_kfree(&hdev->dev, drvdata->kbd_backlight);
594 	}
595 
596 	return ret;
597 }
598 
599 /*
600  * [0]       REPORT_ID (same value defined in report descriptor)
601  * [1]	     rest battery level. range [0..255]
602  * [2]..[7]  Bluetooth hardware address (MAC address)
603  * [8]       charging status
604  *            = 0 : AC offline / discharging
605  *            = 1 : AC online  / charging
606  *            = 2 : AC online  / fully charged
607  */
608 static int asus_parse_battery(struct asus_drvdata *drvdata, u8 *data, int size)
609 {
610 	u8 sts;
611 	u8 lvl;
612 	int val;
613 
614 	lvl = data[1];
615 	sts = data[8];
616 
617 	drvdata->battery_capacity = ((int)lvl * 100) / (int)BATTERY_LEVEL_MAX;
618 
619 	switch (sts) {
620 	case BATTERY_STAT_CHARGING:
621 		val = POWER_SUPPLY_STATUS_CHARGING;
622 		break;
623 	case BATTERY_STAT_FULL:
624 		val = POWER_SUPPLY_STATUS_FULL;
625 		break;
626 	case BATTERY_STAT_DISCONNECT:
627 	default:
628 		val = POWER_SUPPLY_STATUS_DISCHARGING;
629 		break;
630 	}
631 	drvdata->battery_stat = val;
632 
633 	return 0;
634 }
635 
636 static int asus_report_battery(struct asus_drvdata *drvdata, u8 *data, int size)
637 {
638 	/* notify only the autonomous event by device */
639 	if ((drvdata->battery_in_query == false) &&
640 			 (size == BATTERY_REPORT_SIZE))
641 		power_supply_changed(drvdata->battery);
642 
643 	return 0;
644 }
645 
646 static int asus_battery_query(struct asus_drvdata *drvdata)
647 {
648 	u8 *buf;
649 	int ret = 0;
650 
651 	buf = kmalloc(BATTERY_REPORT_SIZE, GFP_KERNEL);
652 	if (!buf)
653 		return -ENOMEM;
654 
655 	drvdata->battery_in_query = true;
656 	ret = hid_hw_raw_request(drvdata->hdev, BATTERY_REPORT_ID,
657 				buf, BATTERY_REPORT_SIZE,
658 				HID_INPUT_REPORT, HID_REQ_GET_REPORT);
659 	drvdata->battery_in_query = false;
660 	if (ret == BATTERY_REPORT_SIZE)
661 		ret = asus_parse_battery(drvdata, buf, BATTERY_REPORT_SIZE);
662 	else
663 		ret = -ENODATA;
664 
665 	kfree(buf);
666 
667 	return ret;
668 }
669 
670 static enum power_supply_property asus_battery_props[] = {
671 	POWER_SUPPLY_PROP_STATUS,
672 	POWER_SUPPLY_PROP_PRESENT,
673 	POWER_SUPPLY_PROP_CAPACITY,
674 	POWER_SUPPLY_PROP_SCOPE,
675 	POWER_SUPPLY_PROP_MODEL_NAME,
676 };
677 
678 #define	QUERY_MIN_INTERVAL	(60 * HZ)	/* 60[sec] */
679 
680 static int asus_battery_get_property(struct power_supply *psy,
681 				enum power_supply_property psp,
682 				union power_supply_propval *val)
683 {
684 	struct asus_drvdata *drvdata = power_supply_get_drvdata(psy);
685 	int ret = 0;
686 
687 	switch (psp) {
688 	case POWER_SUPPLY_PROP_STATUS:
689 	case POWER_SUPPLY_PROP_CAPACITY:
690 		if (time_before(drvdata->battery_next_query, jiffies)) {
691 			drvdata->battery_next_query =
692 					 jiffies + QUERY_MIN_INTERVAL;
693 			ret = asus_battery_query(drvdata);
694 			if (ret)
695 				return ret;
696 		}
697 		if (psp == POWER_SUPPLY_PROP_STATUS)
698 			val->intval = drvdata->battery_stat;
699 		else
700 			val->intval = drvdata->battery_capacity;
701 		break;
702 	case POWER_SUPPLY_PROP_PRESENT:
703 		val->intval = 1;
704 		break;
705 	case POWER_SUPPLY_PROP_SCOPE:
706 		val->intval = POWER_SUPPLY_SCOPE_DEVICE;
707 		break;
708 	case POWER_SUPPLY_PROP_MODEL_NAME:
709 		val->strval = drvdata->hdev->name;
710 		break;
711 	default:
712 		ret = -EINVAL;
713 		break;
714 	}
715 
716 	return ret;
717 }
718 
719 static int asus_battery_probe(struct hid_device *hdev)
720 {
721 	struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
722 	struct power_supply_config pscfg = { .drv_data = drvdata };
723 	int ret = 0;
724 
725 	drvdata->battery_capacity = 0;
726 	drvdata->battery_stat = POWER_SUPPLY_STATUS_UNKNOWN;
727 	drvdata->battery_in_query = false;
728 
729 	drvdata->battery_desc.properties = asus_battery_props;
730 	drvdata->battery_desc.num_properties = ARRAY_SIZE(asus_battery_props);
731 	drvdata->battery_desc.get_property = asus_battery_get_property;
732 	drvdata->battery_desc.type = POWER_SUPPLY_TYPE_BATTERY;
733 	drvdata->battery_desc.use_for_apm = 0;
734 	drvdata->battery_desc.name = devm_kasprintf(&hdev->dev, GFP_KERNEL,
735 					"asus-keyboard-%s-battery",
736 					strlen(hdev->uniq) ?
737 					hdev->uniq : dev_name(&hdev->dev));
738 	if (!drvdata->battery_desc.name)
739 		return -ENOMEM;
740 
741 	drvdata->battery_next_query = jiffies;
742 
743 	drvdata->battery = devm_power_supply_register(&hdev->dev,
744 				&(drvdata->battery_desc), &pscfg);
745 	if (IS_ERR(drvdata->battery)) {
746 		ret = PTR_ERR(drvdata->battery);
747 		drvdata->battery = NULL;
748 		hid_err(hdev, "Unable to register battery device\n");
749 		return ret;
750 	}
751 
752 	power_supply_powers(drvdata->battery, &hdev->dev);
753 
754 	return ret;
755 }
756 
757 static int asus_input_configured(struct hid_device *hdev, struct hid_input *hi)
758 {
759 	struct input_dev *input = hi->input;
760 	struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
761 
762 	/* T100CHI uses MULTI_INPUT, bind the touchpad to the mouse hid_input */
763 	if (drvdata->quirks & QUIRK_T100CHI &&
764 	    hi->report->id != T100CHI_MOUSE_REPORT_ID)
765 		return 0;
766 
767 	/* Handle MULTI_INPUT on E1239T mouse/touchpad USB interface */
768 	if (drvdata->tp && (drvdata->quirks & QUIRK_MEDION_E1239T)) {
769 		switch (hi->report->id) {
770 		case E1239T_TP_TOGGLE_REPORT_ID:
771 			input_set_capability(input, EV_KEY, KEY_F21);
772 			input->name = "Asus Touchpad Keys";
773 			drvdata->tp_kbd_input = input;
774 			return 0;
775 		case INPUT_REPORT_ID:
776 			break; /* Touchpad report, handled below */
777 		default:
778 			return 0; /* Ignore other reports */
779 		}
780 	}
781 
782 	if (drvdata->tp) {
783 		int ret;
784 
785 		input_set_abs_params(input, ABS_MT_POSITION_X, 0,
786 				     drvdata->tp->max_x, 0, 0);
787 		input_set_abs_params(input, ABS_MT_POSITION_Y, 0,
788 				     drvdata->tp->max_y, 0, 0);
789 		input_abs_set_res(input, ABS_MT_POSITION_X, drvdata->tp->res_x);
790 		input_abs_set_res(input, ABS_MT_POSITION_Y, drvdata->tp->res_y);
791 
792 		if (drvdata->tp->contact_size >= 5) {
793 			input_set_abs_params(input, ABS_TOOL_WIDTH, 0,
794 					     MAX_TOUCH_MAJOR, 0, 0);
795 			input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0,
796 					     MAX_TOUCH_MAJOR, 0, 0);
797 			input_set_abs_params(input, ABS_MT_PRESSURE, 0,
798 					      MAX_PRESSURE, 0, 0);
799 		}
800 
801 		__set_bit(BTN_LEFT, input->keybit);
802 		__set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
803 
804 		ret = input_mt_init_slots(input, drvdata->tp->max_contacts,
805 					  INPUT_MT_POINTER);
806 
807 		if (ret) {
808 			hid_err(hdev, "Asus input mt init slots failed: %d\n", ret);
809 			return ret;
810 		}
811 	}
812 
813 	drvdata->input = input;
814 
815 	if (drvdata->enable_backlight &&
816 	    !asus_kbd_wmi_led_control_present(hdev) &&
817 	    asus_kbd_register_leds(hdev))
818 		hid_warn(hdev, "Failed to initialize backlight.\n");
819 
820 	return 0;
821 }
822 
823 #define asus_map_key_clear(c)	hid_map_usage_clear(hi, usage, bit, \
824 						    max, EV_KEY, (c))
825 static int asus_input_mapping(struct hid_device *hdev,
826 		struct hid_input *hi, struct hid_field *field,
827 		struct hid_usage *usage, unsigned long **bit,
828 		int *max)
829 {
830 	struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
831 
832 	if (drvdata->quirks & QUIRK_SKIP_INPUT_MAPPING) {
833 		/* Don't map anything from the HID report.
834 		 * We do it all manually in asus_input_configured
835 		 */
836 		return -1;
837 	}
838 
839 	/*
840 	 * Ignore a bunch of bogus collections in the T100CHI descriptor.
841 	 * This avoids a bunch of non-functional hid_input devices getting
842 	 * created because of the T100CHI using HID_QUIRK_MULTI_INPUT.
843 	 */
844 	if ((drvdata->quirks & (QUIRK_T100CHI | QUIRK_T90CHI)) &&
845 	    (field->application == (HID_UP_GENDESK | 0x0080) ||
846 	     field->application == HID_GD_MOUSE ||
847 	     usage->hid == (HID_UP_GENDEVCTRLS | 0x0024) ||
848 	     usage->hid == (HID_UP_GENDEVCTRLS | 0x0025) ||
849 	     usage->hid == (HID_UP_GENDEVCTRLS | 0x0026)))
850 		return -1;
851 
852 	/* ASUS-specific keyboard hotkeys and led backlight */
853 	if ((usage->hid & HID_USAGE_PAGE) == HID_UP_ASUSVENDOR) {
854 		switch (usage->hid & HID_USAGE) {
855 		case 0x10: asus_map_key_clear(KEY_BRIGHTNESSDOWN);	break;
856 		case 0x20: asus_map_key_clear(KEY_BRIGHTNESSUP);		break;
857 		case 0x35: asus_map_key_clear(KEY_DISPLAY_OFF);		break;
858 		case 0x6c: asus_map_key_clear(KEY_SLEEP);		break;
859 		case 0x7c: asus_map_key_clear(KEY_MICMUTE);		break;
860 		case 0x82: asus_map_key_clear(KEY_CAMERA);		break;
861 		case 0x88: asus_map_key_clear(KEY_RFKILL);			break;
862 		case 0xb5: asus_map_key_clear(KEY_CALC);			break;
863 		case 0xc4: asus_map_key_clear(KEY_KBDILLUMUP);		break;
864 		case 0xc5: asus_map_key_clear(KEY_KBDILLUMDOWN);		break;
865 
866 		/* ASUS touchpad toggle */
867 		case 0x6b: asus_map_key_clear(KEY_F21);			break;
868 
869 		/* ROG key */
870 		case 0x38: asus_map_key_clear(KEY_PROG1);		break;
871 
872 		/* Fn+C ASUS Splendid */
873 		case 0xba: asus_map_key_clear(KEY_PROG2);		break;
874 
875 		/* Fn+Space Power4Gear Hybrid */
876 		case 0x5c: asus_map_key_clear(KEY_PROG3);		break;
877 
878 		/* Fn+F5 "fan" symbol on FX503VD */
879 		case 0x99: asus_map_key_clear(KEY_PROG4);		break;
880 
881 		/* Fn+F5 "fan" symbol on N-Key keyboard */
882 		case 0xae: asus_map_key_clear(KEY_PROG4);		break;
883 
884 		/* Fn+Ret "Calc" symbol on N-Key keyboard */
885 		case 0x92: asus_map_key_clear(KEY_CALC);		break;
886 
887 		/* Fn+Left Aura mode previous on N-Key keyboard */
888 		case 0xb2: asus_map_key_clear(KEY_PROG2);		break;
889 
890 		/* Fn+Right Aura mode next on N-Key keyboard */
891 		case 0xb3: asus_map_key_clear(KEY_PROG3);		break;
892 
893 		default:
894 			/* ASUS lazily declares 256 usages, ignore the rest,
895 			 * as some make the keyboard appear as a pointer device. */
896 			return -1;
897 		}
898 
899 		/*
900 		 * Check and enable backlight only on devices with UsagePage ==
901 		 * 0xff31 to avoid initializing the keyboard firmware multiple
902 		 * times on devices with multiple HID descriptors but same
903 		 * PID/VID.
904 		 */
905 		if (drvdata->quirks & QUIRK_USE_KBD_BACKLIGHT)
906 			drvdata->enable_backlight = true;
907 
908 		set_bit(EV_REP, hi->input->evbit);
909 		return 1;
910 	}
911 
912 	if ((usage->hid & HID_USAGE_PAGE) == HID_UP_MSVENDOR) {
913 		switch (usage->hid & HID_USAGE) {
914 		case 0xff01: asus_map_key_clear(BTN_1);	break;
915 		case 0xff02: asus_map_key_clear(BTN_2);	break;
916 		case 0xff03: asus_map_key_clear(BTN_3);	break;
917 		case 0xff04: asus_map_key_clear(BTN_4);	break;
918 		case 0xff05: asus_map_key_clear(BTN_5);	break;
919 		case 0xff06: asus_map_key_clear(BTN_6);	break;
920 		case 0xff07: asus_map_key_clear(BTN_7);	break;
921 		case 0xff08: asus_map_key_clear(BTN_8);	break;
922 		case 0xff09: asus_map_key_clear(BTN_9);	break;
923 		case 0xff0a: asus_map_key_clear(BTN_A);	break;
924 		case 0xff0b: asus_map_key_clear(BTN_B);	break;
925 		case 0x00f1: asus_map_key_clear(KEY_WLAN);	break;
926 		case 0x00f2: asus_map_key_clear(KEY_BRIGHTNESSDOWN);	break;
927 		case 0x00f3: asus_map_key_clear(KEY_BRIGHTNESSUP);	break;
928 		case 0x00f4: asus_map_key_clear(KEY_DISPLAY_OFF);	break;
929 		case 0x00f7: asus_map_key_clear(KEY_CAMERA);	break;
930 		case 0x00f8: asus_map_key_clear(KEY_PROG1);	break;
931 		default:
932 			return 0;
933 		}
934 
935 		set_bit(EV_REP, hi->input->evbit);
936 		return 1;
937 	}
938 
939 	if (drvdata->quirks & QUIRK_NO_CONSUMER_USAGES &&
940 		(usage->hid & HID_USAGE_PAGE) == HID_UP_CONSUMER) {
941 		switch (usage->hid & HID_USAGE) {
942 		case 0xe2: /* Mute */
943 		case 0xe9: /* Volume up */
944 		case 0xea: /* Volume down */
945 			return 0;
946 		default:
947 			/* Ignore dummy Consumer usages which make the
948 			 * keyboard incorrectly appear as a pointer device.
949 			 */
950 			return -1;
951 		}
952 	}
953 
954 	/*
955 	 * The mute button is broken and only sends press events, we
956 	 * deal with this in our raw_event handler, so do not map it.
957 	 */
958 	if ((drvdata->quirks & QUIRK_MEDION_E1239T) &&
959 	    usage->hid == (HID_UP_CONSUMER | 0xe2)) {
960 		input_set_capability(hi->input, EV_KEY, KEY_MUTE);
961 		return -1;
962 	}
963 
964 	return 0;
965 }
966 
967 static int asus_start_multitouch(struct hid_device *hdev)
968 {
969 	int ret;
970 	static const unsigned char buf[] = {
971 		FEATURE_REPORT_ID, 0x00, 0x03, 0x01, 0x00
972 	};
973 	unsigned char *dmabuf = kmemdup(buf, sizeof(buf), GFP_KERNEL);
974 
975 	if (!dmabuf) {
976 		ret = -ENOMEM;
977 		hid_err(hdev, "Asus failed to alloc dma buf: %d\n", ret);
978 		return ret;
979 	}
980 
981 	ret = hid_hw_raw_request(hdev, dmabuf[0], dmabuf, sizeof(buf),
982 					HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
983 
984 	kfree(dmabuf);
985 
986 	if (ret != sizeof(buf)) {
987 		hid_err(hdev, "Asus failed to start multitouch: %d\n", ret);
988 		return ret;
989 	}
990 
991 	return 0;
992 }
993 
994 static int __maybe_unused asus_reset_resume(struct hid_device *hdev)
995 {
996 	struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
997 
998 	if (drvdata->tp)
999 		return asus_start_multitouch(hdev);
1000 
1001 	return 0;
1002 }
1003 
1004 static int asus_probe(struct hid_device *hdev, const struct hid_device_id *id)
1005 {
1006 	int ret;
1007 	struct asus_drvdata *drvdata;
1008 
1009 	drvdata = devm_kzalloc(&hdev->dev, sizeof(*drvdata), GFP_KERNEL);
1010 	if (drvdata == NULL) {
1011 		hid_err(hdev, "Can't alloc Asus descriptor\n");
1012 		return -ENOMEM;
1013 	}
1014 
1015 	hid_set_drvdata(hdev, drvdata);
1016 
1017 	drvdata->quirks = id->driver_data;
1018 
1019 	/*
1020 	 * T90CHI's keyboard dock returns same ID values as T100CHI's dock.
1021 	 * Thus, identify T90CHI dock with product name string.
1022 	 */
1023 	if (strstr(hdev->name, "T90CHI")) {
1024 		drvdata->quirks &= ~QUIRK_T100CHI;
1025 		drvdata->quirks |= QUIRK_T90CHI;
1026 	}
1027 
1028 	if (drvdata->quirks & QUIRK_IS_MULTITOUCH)
1029 		drvdata->tp = &asus_i2c_tp;
1030 
1031 	if ((drvdata->quirks & QUIRK_T100_KEYBOARD) && hid_is_usb(hdev)) {
1032 		struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
1033 
1034 		if (intf->altsetting->desc.bInterfaceNumber == T100_TPAD_INTF) {
1035 			drvdata->quirks = QUIRK_SKIP_INPUT_MAPPING;
1036 			/*
1037 			 * The T100HA uses the same USB-ids as the T100TAF and
1038 			 * the T200TA uses the same USB-ids as the T100TA, while
1039 			 * both have different max x/y values as the T100TA[F].
1040 			 */
1041 			if (dmi_match(DMI_PRODUCT_NAME, "T100HAN"))
1042 				drvdata->tp = &asus_t100ha_tp;
1043 			else if (dmi_match(DMI_PRODUCT_NAME, "T200TA"))
1044 				drvdata->tp = &asus_t200ta_tp;
1045 			else
1046 				drvdata->tp = &asus_t100ta_tp;
1047 		}
1048 	}
1049 
1050 	if (drvdata->quirks & QUIRK_T100CHI) {
1051 		/*
1052 		 * All functionality is on a single HID interface and for
1053 		 * userspace the touchpad must be a separate input_dev.
1054 		 */
1055 		hdev->quirks |= HID_QUIRK_MULTI_INPUT;
1056 		drvdata->tp = &asus_t100chi_tp;
1057 	}
1058 
1059 	if ((drvdata->quirks & QUIRK_MEDION_E1239T) && hid_is_usb(hdev)) {
1060 		struct usb_host_interface *alt =
1061 			to_usb_interface(hdev->dev.parent)->altsetting;
1062 
1063 		if (alt->desc.bInterfaceNumber == MEDION_E1239T_TPAD_INTF) {
1064 			/* For separate input-devs for tp and tp toggle key */
1065 			hdev->quirks |= HID_QUIRK_MULTI_INPUT;
1066 			drvdata->quirks |= QUIRK_SKIP_INPUT_MAPPING;
1067 			drvdata->tp = &medion_e1239t_tp;
1068 		}
1069 	}
1070 
1071 	if (drvdata->quirks & QUIRK_NO_INIT_REPORTS)
1072 		hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
1073 
1074 	drvdata->hdev = hdev;
1075 
1076 	if (drvdata->quirks & (QUIRK_T100CHI | QUIRK_T90CHI)) {
1077 		ret = asus_battery_probe(hdev);
1078 		if (ret) {
1079 			hid_err(hdev,
1080 			    "Asus hid battery_probe failed: %d\n", ret);
1081 			return ret;
1082 		}
1083 	}
1084 
1085 	ret = hid_parse(hdev);
1086 	if (ret) {
1087 		hid_err(hdev, "Asus hid parse failed: %d\n", ret);
1088 		return ret;
1089 	}
1090 
1091 	ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
1092 	if (ret) {
1093 		hid_err(hdev, "Asus hw start failed: %d\n", ret);
1094 		return ret;
1095 	}
1096 
1097 	if (!drvdata->input) {
1098 		hid_err(hdev, "Asus input not registered\n");
1099 		ret = -ENOMEM;
1100 		goto err_stop_hw;
1101 	}
1102 
1103 	if (drvdata->tp) {
1104 		drvdata->input->name = "Asus TouchPad";
1105 	} else {
1106 		drvdata->input->name = "Asus Keyboard";
1107 	}
1108 
1109 	if (drvdata->tp) {
1110 		ret = asus_start_multitouch(hdev);
1111 		if (ret)
1112 			goto err_stop_hw;
1113 	}
1114 
1115 	return 0;
1116 err_stop_hw:
1117 	hid_hw_stop(hdev);
1118 	return ret;
1119 }
1120 
1121 static void asus_remove(struct hid_device *hdev)
1122 {
1123 	struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
1124 
1125 	if (drvdata->kbd_backlight) {
1126 		drvdata->kbd_backlight->removed = true;
1127 		cancel_work_sync(&drvdata->kbd_backlight->work);
1128 	}
1129 
1130 	hid_hw_stop(hdev);
1131 }
1132 
1133 static const __u8 asus_g752_fixed_rdesc[] = {
1134         0x19, 0x00,			/*   Usage Minimum (0x00)       */
1135         0x2A, 0xFF, 0x00,		/*   Usage Maximum (0xFF)       */
1136 };
1137 
1138 static __u8 *asus_report_fixup(struct hid_device *hdev, __u8 *rdesc,
1139 		unsigned int *rsize)
1140 {
1141 	struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
1142 
1143 	if (drvdata->quirks & QUIRK_FIX_NOTEBOOK_REPORT &&
1144 			*rsize >= 56 && rdesc[54] == 0x25 && rdesc[55] == 0x65) {
1145 		hid_info(hdev, "Fixing up Asus notebook report descriptor\n");
1146 		rdesc[55] = 0xdd;
1147 	}
1148 	/* For the T100TA/T200TA keyboard dock */
1149 	if (drvdata->quirks & QUIRK_T100_KEYBOARD &&
1150 		 (*rsize == 76 || *rsize == 101) &&
1151 		 rdesc[73] == 0x81 && rdesc[74] == 0x01) {
1152 		hid_info(hdev, "Fixing up Asus T100 keyb report descriptor\n");
1153 		rdesc[74] &= ~HID_MAIN_ITEM_CONSTANT;
1154 	}
1155 	/* For the T100CHI/T90CHI keyboard dock */
1156 	if (drvdata->quirks & (QUIRK_T100CHI | QUIRK_T90CHI)) {
1157 		int rsize_orig;
1158 		int offs;
1159 
1160 		if (drvdata->quirks & QUIRK_T100CHI) {
1161 			rsize_orig = 403;
1162 			offs = 388;
1163 		} else {
1164 			rsize_orig = 306;
1165 			offs = 291;
1166 		}
1167 
1168 		/*
1169 		 * Change Usage (76h) to Usage Minimum (00h), Usage Maximum
1170 		 * (FFh) and clear the flags in the Input() byte.
1171 		 * Note the descriptor has a bogus 0 byte at the end so we
1172 		 * only need 1 extra byte.
1173 		 */
1174 		if (*rsize == rsize_orig &&
1175 			rdesc[offs] == 0x09 && rdesc[offs + 1] == 0x76) {
1176 			*rsize = rsize_orig + 1;
1177 			rdesc = kmemdup(rdesc, *rsize, GFP_KERNEL);
1178 			if (!rdesc)
1179 				return NULL;
1180 
1181 			hid_info(hdev, "Fixing up %s keyb report descriptor\n",
1182 				drvdata->quirks & QUIRK_T100CHI ?
1183 				"T100CHI" : "T90CHI");
1184 			memmove(rdesc + offs + 4, rdesc + offs + 2, 12);
1185 			rdesc[offs] = 0x19;
1186 			rdesc[offs + 1] = 0x00;
1187 			rdesc[offs + 2] = 0x29;
1188 			rdesc[offs + 3] = 0xff;
1189 			rdesc[offs + 14] = 0x00;
1190 		}
1191 	}
1192 
1193 	if (drvdata->quirks & QUIRK_G752_KEYBOARD &&
1194 		 *rsize == 75 && rdesc[61] == 0x15 && rdesc[62] == 0x00) {
1195 		/* report is missing usage mninum and maximum */
1196 		__u8 *new_rdesc;
1197 		size_t new_size = *rsize + sizeof(asus_g752_fixed_rdesc);
1198 
1199 		new_rdesc = devm_kzalloc(&hdev->dev, new_size, GFP_KERNEL);
1200 		if (new_rdesc == NULL)
1201 			return rdesc;
1202 
1203 		hid_info(hdev, "Fixing up Asus G752 keyb report descriptor\n");
1204 		/* copy the valid part */
1205 		memcpy(new_rdesc, rdesc, 61);
1206 		/* insert missing part */
1207 		memcpy(new_rdesc + 61, asus_g752_fixed_rdesc, sizeof(asus_g752_fixed_rdesc));
1208 		/* copy remaining data */
1209 		memcpy(new_rdesc + 61 + sizeof(asus_g752_fixed_rdesc), rdesc + 61, *rsize - 61);
1210 
1211 		*rsize = new_size;
1212 		rdesc = new_rdesc;
1213 	}
1214 
1215 	if (drvdata->quirks & QUIRK_ROG_NKEY_KEYBOARD &&
1216 			*rsize == 331 && rdesc[190] == 0x85 && rdesc[191] == 0x5a &&
1217 			rdesc[204] == 0x95 && rdesc[205] == 0x05) {
1218 		hid_info(hdev, "Fixing up Asus N-KEY keyb report descriptor\n");
1219 		rdesc[205] = 0x01;
1220 	}
1221 
1222 	return rdesc;
1223 }
1224 
1225 static const struct hid_device_id asus_devices[] = {
1226 	{ HID_I2C_DEVICE(USB_VENDOR_ID_ASUSTEK,
1227 		USB_DEVICE_ID_ASUSTEK_I2C_KEYBOARD), I2C_KEYBOARD_QUIRKS},
1228 	{ HID_I2C_DEVICE(USB_VENDOR_ID_ASUSTEK,
1229 		USB_DEVICE_ID_ASUSTEK_I2C_TOUCHPAD), I2C_TOUCHPAD_QUIRKS },
1230 	{ HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK,
1231 		USB_DEVICE_ID_ASUSTEK_ROG_KEYBOARD1), QUIRK_USE_KBD_BACKLIGHT },
1232 	{ HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK,
1233 		USB_DEVICE_ID_ASUSTEK_ROG_KEYBOARD2), QUIRK_USE_KBD_BACKLIGHT },
1234 	{ HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK,
1235 		USB_DEVICE_ID_ASUSTEK_ROG_KEYBOARD3), QUIRK_G752_KEYBOARD },
1236 	{ HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK,
1237 		USB_DEVICE_ID_ASUSTEK_FX503VD_KEYBOARD),
1238 	  QUIRK_USE_KBD_BACKLIGHT },
1239 	{ HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK,
1240 	    USB_DEVICE_ID_ASUSTEK_ROG_NKEY_KEYBOARD),
1241 	  QUIRK_USE_KBD_BACKLIGHT | QUIRK_ROG_NKEY_KEYBOARD },
1242 	{ HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK,
1243 	    USB_DEVICE_ID_ASUSTEK_ROG_NKEY_KEYBOARD2),
1244 	  QUIRK_USE_KBD_BACKLIGHT | QUIRK_ROG_NKEY_KEYBOARD },
1245 	{ HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK,
1246 	    USB_DEVICE_ID_ASUSTEK_ROG_CLAYMORE_II_KEYBOARD),
1247 	  QUIRK_ROG_CLAYMORE_II_KEYBOARD },
1248 	{ HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK,
1249 		USB_DEVICE_ID_ASUSTEK_T100TA_KEYBOARD),
1250 	  QUIRK_T100_KEYBOARD | QUIRK_NO_CONSUMER_USAGES },
1251 	{ HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK,
1252 		USB_DEVICE_ID_ASUSTEK_T100TAF_KEYBOARD),
1253 	  QUIRK_T100_KEYBOARD | QUIRK_NO_CONSUMER_USAGES },
1254 	{ HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_ASUS_AK1D) },
1255 	{ HID_USB_DEVICE(USB_VENDOR_ID_TURBOX, USB_DEVICE_ID_ASUS_MD_5110) },
1256 	{ HID_USB_DEVICE(USB_VENDOR_ID_JESS, USB_DEVICE_ID_ASUS_MD_5112) },
1257 	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ASUSTEK,
1258 		USB_DEVICE_ID_ASUSTEK_T100CHI_KEYBOARD), QUIRK_T100CHI },
1259 	{ HID_USB_DEVICE(USB_VENDOR_ID_ITE, USB_DEVICE_ID_ITE_MEDION_E1239T),
1260 		QUIRK_MEDION_E1239T },
1261 	/*
1262 	 * Note bind to the HID_GROUP_GENERIC group, so that we only bind to the keyboard
1263 	 * part, while letting hid-multitouch.c handle the touchpad.
1264 	 */
1265 	{ HID_DEVICE(BUS_USB, HID_GROUP_GENERIC,
1266 		USB_VENDOR_ID_ASUSTEK, USB_DEVICE_ID_ASUSTEK_T101HA_KEYBOARD) },
1267 	{ }
1268 };
1269 MODULE_DEVICE_TABLE(hid, asus_devices);
1270 
1271 static struct hid_driver asus_driver = {
1272 	.name			= "asus",
1273 	.id_table		= asus_devices,
1274 	.report_fixup		= asus_report_fixup,
1275 	.probe                  = asus_probe,
1276 	.remove			= asus_remove,
1277 	.input_mapping          = asus_input_mapping,
1278 	.input_configured       = asus_input_configured,
1279 #ifdef CONFIG_PM
1280 	.reset_resume           = asus_reset_resume,
1281 #endif
1282 	.event			= asus_event,
1283 	.raw_event		= asus_raw_event
1284 };
1285 module_hid_driver(asus_driver);
1286 
1287 MODULE_LICENSE("GPL");
1288