xref: /openbmc/linux/drivers/input/mouse/synaptics.c (revision 5d0e4d78)
1 /*
2  * Synaptics TouchPad PS/2 mouse driver
3  *
4  *   2003 Dmitry Torokhov <dtor@mail.ru>
5  *     Added support for pass-through port. Special thanks to Peter Berg Larsen
6  *     for explaining various Synaptics quirks.
7  *
8  *   2003 Peter Osterlund <petero2@telia.com>
9  *     Ported to 2.5 input device infrastructure.
10  *
11  *   Copyright (C) 2001 Stefan Gmeiner <riddlebox@freesurf.ch>
12  *     start merging tpconfig and gpm code to a xfree-input module
13  *     adding some changes and extensions (ex. 3rd and 4th button)
14  *
15  *   Copyright (c) 1997 C. Scott Ananian <cananian@alumni.priceton.edu>
16  *   Copyright (c) 1998-2000 Bruce Kalk <kall@compass.com>
17  *     code for the special synaptics commands (from the tpconfig-source)
18  *
19  * This program is free software; you can redistribute it and/or modify it
20  * under the terms of the GNU General Public License version 2 as published by
21  * the Free Software Foundation.
22  *
23  * Trademarks are the property of their respective owners.
24  */
25 
26 #include <linux/module.h>
27 #include <linux/delay.h>
28 #include <linux/dmi.h>
29 #include <linux/input/mt.h>
30 #include <linux/serio.h>
31 #include <linux/libps2.h>
32 #include <linux/rmi.h>
33 #include <linux/i2c.h>
34 #include <linux/slab.h>
35 #include "psmouse.h"
36 #include "synaptics.h"
37 
38 /*
39  * The x/y limits are taken from the Synaptics TouchPad interfacing Guide,
40  * section 2.3.2, which says that they should be valid regardless of the
41  * actual size of the sensor.
42  * Note that newer firmware allows querying device for maximum useable
43  * coordinates.
44  */
45 #define XMIN 0
46 #define XMAX 6143
47 #define YMIN 0
48 #define YMAX 6143
49 #define XMIN_NOMINAL 1472
50 #define XMAX_NOMINAL 5472
51 #define YMIN_NOMINAL 1408
52 #define YMAX_NOMINAL 4448
53 
54 /* Size in bits of absolute position values reported by the hardware */
55 #define ABS_POS_BITS 13
56 
57 /*
58  * These values should represent the absolute maximum value that will
59  * be reported for a positive position value. Some Synaptics firmware
60  * uses this value to indicate a finger near the edge of the touchpad
61  * whose precise position cannot be determined.
62  *
63  * At least one touchpad is known to report positions in excess of this
64  * value which are actually negative values truncated to the 13-bit
65  * reporting range. These values have never been observed to be lower
66  * than 8184 (i.e. -8), so we treat all values greater than 8176 as
67  * negative and any other value as positive.
68  */
69 #define X_MAX_POSITIVE 8176
70 #define Y_MAX_POSITIVE 8176
71 
72 /* maximum ABS_MT_POSITION displacement (in mm) */
73 #define DMAX 10
74 
75 /*****************************************************************************
76  *	Stuff we need even when we do not want native Synaptics support
77  ****************************************************************************/
78 
79 /*
80  * Set the synaptics touchpad mode byte by special commands
81  */
82 static int synaptics_mode_cmd(struct psmouse *psmouse, u8 mode)
83 {
84 	u8 param[1];
85 	int error;
86 
87 	error = psmouse_sliced_command(psmouse, mode);
88 	if (error)
89 		return error;
90 
91 	param[0] = SYN_PS_SET_MODE2;
92 	error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_SETRATE);
93 	if (error)
94 		return error;
95 
96 	return 0;
97 }
98 
99 int synaptics_detect(struct psmouse *psmouse, bool set_properties)
100 {
101 	struct ps2dev *ps2dev = &psmouse->ps2dev;
102 	u8 param[4];
103 
104 	param[0] = 0;
105 
106 	ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
107 	ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
108 	ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
109 	ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
110 	ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
111 
112 	if (param[1] != 0x47)
113 		return -ENODEV;
114 
115 	if (set_properties) {
116 		psmouse->vendor = "Synaptics";
117 		psmouse->name = "TouchPad";
118 	}
119 
120 	return 0;
121 }
122 
123 void synaptics_reset(struct psmouse *psmouse)
124 {
125 	/* reset touchpad back to relative mode, gestures enabled */
126 	synaptics_mode_cmd(psmouse, 0);
127 }
128 
129 #if defined(CONFIG_MOUSE_PS2_SYNAPTICS) || \
130     defined(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)
131 
132 /* This list has been kindly provided by Synaptics. */
133 static const char * const topbuttonpad_pnp_ids[] = {
134 	"LEN0017",
135 	"LEN0018",
136 	"LEN0019",
137 	"LEN0023",
138 	"LEN002A",
139 	"LEN002B",
140 	"LEN002C",
141 	"LEN002D",
142 	"LEN002E",
143 	"LEN0033", /* Helix */
144 	"LEN0034", /* T431s, L440, L540, T540, W540, X1 Carbon 2nd */
145 	"LEN0035", /* X240 */
146 	"LEN0036", /* T440 */
147 	"LEN0037", /* X1 Carbon 2nd */
148 	"LEN0038",
149 	"LEN0039", /* T440s */
150 	"LEN0041",
151 	"LEN0042", /* Yoga */
152 	"LEN0045",
153 	"LEN0047",
154 	"LEN0049",
155 	"LEN2000", /* S540 */
156 	"LEN2001", /* Edge E431 */
157 	"LEN2002", /* Edge E531 */
158 	"LEN2003",
159 	"LEN2004", /* L440 */
160 	"LEN2005",
161 	"LEN2006", /* Edge E440/E540 */
162 	"LEN2007",
163 	"LEN2008",
164 	"LEN2009",
165 	"LEN200A",
166 	"LEN200B",
167 	NULL
168 };
169 
170 static const char * const smbus_pnp_ids[] = {
171 	/* all of the topbuttonpad_pnp_ids are valid, we just add some extras */
172 	"LEN0048", /* X1 Carbon 3 */
173 	"LEN0046", /* X250 */
174 	"LEN004a", /* W541 */
175 	"LEN200f", /* T450s */
176 	NULL
177 };
178 
179 static const char * const forcepad_pnp_ids[] = {
180 	"SYN300D",
181 	"SYN3014",
182 	NULL
183 };
184 
185 /*
186  * Send a command to the synpatics touchpad by special commands
187  */
188 static int synaptics_send_cmd(struct psmouse *psmouse, u8 cmd, u8 *param)
189 {
190 	int error;
191 
192 	error = psmouse_sliced_command(psmouse, cmd);
193 	if (error)
194 		return error;
195 
196 	error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO);
197 	if (error)
198 		return error;
199 
200 	return 0;
201 }
202 
203 static int synaptics_query_int(struct psmouse *psmouse, u8 query_cmd, u32 *val)
204 {
205 	int error;
206 	union {
207 		__be32 be_val;
208 		char buf[4];
209 	} resp = { 0 };
210 
211 	error = synaptics_send_cmd(psmouse, query_cmd, resp.buf + 1);
212 	if (error)
213 		return error;
214 
215 	*val = be32_to_cpu(resp.be_val);
216 	return 0;
217 }
218 
219 /*
220  * Identify Touchpad
221  * See also the SYN_ID_* macros
222  */
223 static int synaptics_identify(struct psmouse *psmouse,
224 			      struct synaptics_device_info *info)
225 {
226 	int error;
227 
228 	error = synaptics_query_int(psmouse, SYN_QUE_IDENTIFY, &info->identity);
229 	if (error)
230 		return error;
231 
232 	return SYN_ID_IS_SYNAPTICS(info->identity) ? 0 : -ENXIO;
233 }
234 
235 /*
236  * Read the model-id bytes from the touchpad
237  * see also SYN_MODEL_* macros
238  */
239 static int synaptics_model_id(struct psmouse *psmouse,
240 			      struct synaptics_device_info *info)
241 {
242 	return synaptics_query_int(psmouse, SYN_QUE_MODEL, &info->model_id);
243 }
244 
245 /*
246  * Read the firmware id from the touchpad
247  */
248 static int synaptics_firmware_id(struct psmouse *psmouse,
249 				 struct synaptics_device_info *info)
250 {
251 	return synaptics_query_int(psmouse, SYN_QUE_FIRMWARE_ID,
252 				   &info->firmware_id);
253 }
254 
255 /*
256  * Read the board id and the "More Extended Queries" from the touchpad
257  * The board id is encoded in the "QUERY MODES" response
258  */
259 static int synaptics_query_modes(struct psmouse *psmouse,
260 				 struct synaptics_device_info *info)
261 {
262 	u8 bid[3];
263 	int error;
264 
265 	/* firmwares prior 7.5 have no board_id encoded */
266 	if (SYN_ID_FULL(info->identity) < 0x705)
267 		return 0;
268 
269 	error = synaptics_send_cmd(psmouse, SYN_QUE_MODES, bid);
270 	if (error)
271 		return error;
272 
273 	info->board_id = ((bid[0] & 0xfc) << 6) | bid[1];
274 
275 	if (SYN_MEXT_CAP_BIT(bid[0]))
276 		return synaptics_query_int(psmouse, SYN_QUE_MEXT_CAPAB_10,
277 					   &info->ext_cap_10);
278 
279 	return 0;
280 }
281 
282 /*
283  * Read the capability-bits from the touchpad
284  * see also the SYN_CAP_* macros
285  */
286 static int synaptics_capability(struct psmouse *psmouse,
287 				struct synaptics_device_info *info)
288 {
289 	int error;
290 
291 	error = synaptics_query_int(psmouse, SYN_QUE_CAPABILITIES,
292 				    &info->capabilities);
293 	if (error)
294 		return error;
295 
296 	info->ext_cap = info->ext_cap_0c = 0;
297 
298 	/*
299 	 * Older firmwares had submodel ID fixed to 0x47
300 	 */
301 	if (SYN_ID_FULL(info->identity) < 0x705 &&
302 	    SYN_CAP_SUBMODEL_ID(info->capabilities) != 0x47) {
303 		return -ENXIO;
304 	}
305 
306 	/*
307 	 * Unless capExtended is set the rest of the flags should be ignored
308 	 */
309 	if (!SYN_CAP_EXTENDED(info->capabilities))
310 		info->capabilities = 0;
311 
312 	if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 1) {
313 		error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB,
314 					    &info->ext_cap);
315 		if (error) {
316 			psmouse_warn(psmouse,
317 				     "device claims to have extended capabilities, but I'm not able to read them.\n");
318 		} else {
319 			/*
320 			 * if nExtBtn is greater than 8 it should be considered
321 			 * invalid and treated as 0
322 			 */
323 			if (SYN_CAP_MULTI_BUTTON_NO(info->ext_cap) > 8)
324 				info->ext_cap &= ~SYN_CAP_MB_MASK;
325 		}
326 	}
327 
328 	if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 4) {
329 		error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB_0C,
330 					    &info->ext_cap_0c);
331 		if (error)
332 			psmouse_warn(psmouse,
333 				     "device claims to have extended capability 0x0c, but I'm not able to read it.\n");
334 	}
335 
336 	return 0;
337 }
338 
339 /*
340  * Read touchpad resolution and maximum reported coordinates
341  * Resolution is left zero if touchpad does not support the query
342  */
343 static int synaptics_resolution(struct psmouse *psmouse,
344 				struct synaptics_device_info *info)
345 {
346 	u8 resp[3];
347 	int error;
348 
349 	if (SYN_ID_MAJOR(info->identity) < 4)
350 		return 0;
351 
352 	error = synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, resp);
353 	if (!error) {
354 		if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) {
355 			info->x_res = resp[0]; /* x resolution in units/mm */
356 			info->y_res = resp[2]; /* y resolution in units/mm */
357 		}
358 	}
359 
360 	if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 5 &&
361 	    SYN_CAP_MAX_DIMENSIONS(info->ext_cap_0c)) {
362 		error = synaptics_send_cmd(psmouse,
363 					   SYN_QUE_EXT_MAX_COORDS, resp);
364 		if (error) {
365 			psmouse_warn(psmouse,
366 				     "device claims to have max coordinates query, but I'm not able to read it.\n");
367 		} else {
368 			info->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
369 			info->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
370 			psmouse_info(psmouse,
371 				     "queried max coordinates: x [..%d], y [..%d]\n",
372 				     info->x_max, info->y_max);
373 		}
374 	}
375 
376 	if (SYN_CAP_MIN_DIMENSIONS(info->ext_cap_0c) &&
377 	    (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 7 ||
378 	     /*
379 	      * Firmware v8.1 does not report proper number of extended
380 	      * capabilities, but has been proven to report correct min
381 	      * coordinates.
382 	      */
383 	     SYN_ID_FULL(info->identity) == 0x801)) {
384 		error = synaptics_send_cmd(psmouse,
385 					   SYN_QUE_EXT_MIN_COORDS, resp);
386 		if (error) {
387 			psmouse_warn(psmouse,
388 				     "device claims to have min coordinates query, but I'm not able to read it.\n");
389 		} else {
390 			info->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
391 			info->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
392 			psmouse_info(psmouse,
393 				     "queried min coordinates: x [%d..], y [%d..]\n",
394 				     info->x_min, info->y_min);
395 		}
396 	}
397 
398 	return 0;
399 }
400 
401 static int synaptics_query_hardware(struct psmouse *psmouse,
402 				    struct synaptics_device_info *info)
403 {
404 	int error;
405 
406 	memset(info, 0, sizeof(*info));
407 
408 	error = synaptics_identify(psmouse, info);
409 	if (error)
410 		return error;
411 
412 	error = synaptics_model_id(psmouse, info);
413 	if (error)
414 		return error;
415 
416 	error = synaptics_firmware_id(psmouse, info);
417 	if (error)
418 		return error;
419 
420 	error = synaptics_query_modes(psmouse, info);
421 	if (error)
422 		return error;
423 
424 	error = synaptics_capability(psmouse, info);
425 	if (error)
426 		return error;
427 
428 	error = synaptics_resolution(psmouse, info);
429 	if (error)
430 		return error;
431 
432 	return 0;
433 }
434 
435 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
436 
437 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS
438 
439 static bool cr48_profile_sensor;
440 
441 #define ANY_BOARD_ID 0
442 struct min_max_quirk {
443 	const char * const *pnp_ids;
444 	struct {
445 		u32 min, max;
446 	} board_id;
447 	u32 x_min, x_max, y_min, y_max;
448 };
449 
450 static const struct min_max_quirk min_max_pnpid_table[] = {
451 	{
452 		(const char * const []){"LEN0033", NULL},
453 		{ANY_BOARD_ID, ANY_BOARD_ID},
454 		1024, 5052, 2258, 4832
455 	},
456 	{
457 		(const char * const []){"LEN0042", NULL},
458 		{ANY_BOARD_ID, ANY_BOARD_ID},
459 		1232, 5710, 1156, 4696
460 	},
461 	{
462 		(const char * const []){"LEN0034", "LEN0036", "LEN0037",
463 					"LEN0039", "LEN2002", "LEN2004",
464 					NULL},
465 		{ANY_BOARD_ID, 2961},
466 		1024, 5112, 2024, 4832
467 	},
468 	{
469 		(const char * const []){"LEN2000", NULL},
470 		{ANY_BOARD_ID, ANY_BOARD_ID},
471 		1024, 5113, 2021, 4832
472 	},
473 	{
474 		(const char * const []){"LEN2001", NULL},
475 		{ANY_BOARD_ID, ANY_BOARD_ID},
476 		1024, 5022, 2508, 4832
477 	},
478 	{
479 		(const char * const []){"LEN2006", NULL},
480 		{2691, 2691},
481 		1024, 5045, 2457, 4832
482 	},
483 	{
484 		(const char * const []){"LEN2006", NULL},
485 		{ANY_BOARD_ID, ANY_BOARD_ID},
486 		1264, 5675, 1171, 4688
487 	},
488 	{ }
489 };
490 
491 /*****************************************************************************
492  *	Synaptics communications functions
493  ****************************************************************************/
494 
495 /*
496  * Synaptics touchpads report the y coordinate from bottom to top, which is
497  * opposite from what userspace expects.
498  * This function is used to invert y before reporting.
499  */
500 static int synaptics_invert_y(int y)
501 {
502 	return YMAX_NOMINAL + YMIN_NOMINAL - y;
503 }
504 
505 /*
506  * Apply quirk(s) if the hardware matches
507  */
508 static void synaptics_apply_quirks(struct psmouse *psmouse,
509 				   struct synaptics_device_info *info)
510 {
511 	int i;
512 
513 	for (i = 0; min_max_pnpid_table[i].pnp_ids; i++) {
514 		if (!psmouse_matches_pnp_id(psmouse,
515 					    min_max_pnpid_table[i].pnp_ids))
516 			continue;
517 
518 		if (min_max_pnpid_table[i].board_id.min != ANY_BOARD_ID &&
519 		    info->board_id < min_max_pnpid_table[i].board_id.min)
520 			continue;
521 
522 		if (min_max_pnpid_table[i].board_id.max != ANY_BOARD_ID &&
523 		    info->board_id > min_max_pnpid_table[i].board_id.max)
524 			continue;
525 
526 		info->x_min = min_max_pnpid_table[i].x_min;
527 		info->x_max = min_max_pnpid_table[i].x_max;
528 		info->y_min = min_max_pnpid_table[i].y_min;
529 		info->y_max = min_max_pnpid_table[i].y_max;
530 		psmouse_info(psmouse,
531 			     "quirked min/max coordinates: x [%d..%d], y [%d..%d]\n",
532 			     info->x_min, info->x_max,
533 			     info->y_min, info->y_max);
534 		break;
535 	}
536 }
537 
538 static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse)
539 {
540 	static u8 param = 0xc8;
541 	struct synaptics_data *priv = psmouse->private;
542 	int error;
543 
544 	if (!(SYN_CAP_ADV_GESTURE(priv->info.ext_cap_0c) ||
545 	      SYN_CAP_IMAGE_SENSOR(priv->info.ext_cap_0c)))
546 		return 0;
547 
548 	error = psmouse_sliced_command(psmouse, SYN_QUE_MODEL);
549 	if (error)
550 		return error;
551 
552 	error = ps2_command(&psmouse->ps2dev, &param, PSMOUSE_CMD_SETRATE);
553 	if (error)
554 		return error;
555 
556 	/* Advanced gesture mode also sends multi finger data */
557 	priv->info.capabilities |= BIT(1);
558 
559 	return 0;
560 }
561 
562 static int synaptics_set_mode(struct psmouse *psmouse)
563 {
564 	struct synaptics_data *priv = psmouse->private;
565 	int error;
566 
567 	priv->mode = 0;
568 	if (priv->absolute_mode)
569 		priv->mode |= SYN_BIT_ABSOLUTE_MODE;
570 	if (priv->disable_gesture)
571 		priv->mode |= SYN_BIT_DISABLE_GESTURE;
572 	if (psmouse->rate >= 80)
573 		priv->mode |= SYN_BIT_HIGH_RATE;
574 	if (SYN_CAP_EXTENDED(priv->info.capabilities))
575 		priv->mode |= SYN_BIT_W_MODE;
576 
577 	error = synaptics_mode_cmd(psmouse, priv->mode);
578 	if (error)
579 		return error;
580 
581 	if (priv->absolute_mode) {
582 		error = synaptics_set_advanced_gesture_mode(psmouse);
583 		if (error) {
584 			psmouse_err(psmouse,
585 				    "Advanced gesture mode init failed: %d\n",
586 				    error);
587 			return error;
588 		}
589 	}
590 
591 	return 0;
592 }
593 
594 static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate)
595 {
596 	struct synaptics_data *priv = psmouse->private;
597 
598 	if (rate >= 80) {
599 		priv->mode |= SYN_BIT_HIGH_RATE;
600 		psmouse->rate = 80;
601 	} else {
602 		priv->mode &= ~SYN_BIT_HIGH_RATE;
603 		psmouse->rate = 40;
604 	}
605 
606 	synaptics_mode_cmd(psmouse, priv->mode);
607 }
608 
609 /*****************************************************************************
610  *	Synaptics pass-through PS/2 port support
611  ****************************************************************************/
612 static int synaptics_pt_write(struct serio *serio, u8 c)
613 {
614 	struct psmouse *parent = serio_get_drvdata(serio->parent);
615 	u8 rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */
616 	int error;
617 
618 	error = psmouse_sliced_command(parent, c);
619 	if (error)
620 		return error;
621 
622 	error = ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE);
623 	if (error)
624 		return error;
625 
626 	return 0;
627 }
628 
629 static int synaptics_pt_start(struct serio *serio)
630 {
631 	struct psmouse *parent = serio_get_drvdata(serio->parent);
632 	struct synaptics_data *priv = parent->private;
633 
634 	serio_pause_rx(parent->ps2dev.serio);
635 	priv->pt_port = serio;
636 	serio_continue_rx(parent->ps2dev.serio);
637 
638 	return 0;
639 }
640 
641 static void synaptics_pt_stop(struct serio *serio)
642 {
643 	struct psmouse *parent = serio_get_drvdata(serio->parent);
644 	struct synaptics_data *priv = parent->private;
645 
646 	serio_pause_rx(parent->ps2dev.serio);
647 	priv->pt_port = NULL;
648 	serio_continue_rx(parent->ps2dev.serio);
649 }
650 
651 static int synaptics_is_pt_packet(u8 *buf)
652 {
653 	return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
654 }
655 
656 static void synaptics_pass_pt_packet(struct serio *ptport, u8 *packet)
657 {
658 	struct psmouse *child = serio_get_drvdata(ptport);
659 
660 	if (child && child->state == PSMOUSE_ACTIVATED) {
661 		serio_interrupt(ptport, packet[1], 0);
662 		serio_interrupt(ptport, packet[4], 0);
663 		serio_interrupt(ptport, packet[5], 0);
664 		if (child->pktsize == 4)
665 			serio_interrupt(ptport, packet[2], 0);
666 	} else {
667 		serio_interrupt(ptport, packet[1], 0);
668 	}
669 }
670 
671 static void synaptics_pt_activate(struct psmouse *psmouse)
672 {
673 	struct synaptics_data *priv = psmouse->private;
674 	struct psmouse *child = serio_get_drvdata(priv->pt_port);
675 
676 	/* adjust the touchpad to child's choice of protocol */
677 	if (child) {
678 		if (child->pktsize == 4)
679 			priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT;
680 		else
681 			priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT;
682 
683 		if (synaptics_mode_cmd(psmouse, priv->mode))
684 			psmouse_warn(psmouse,
685 				     "failed to switch guest protocol\n");
686 	}
687 }
688 
689 static void synaptics_pt_create(struct psmouse *psmouse)
690 {
691 	struct serio *serio;
692 
693 	serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
694 	if (!serio) {
695 		psmouse_err(psmouse,
696 			    "not enough memory for pass-through port\n");
697 		return;
698 	}
699 
700 	serio->id.type = SERIO_PS_PSTHRU;
701 	strlcpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
702 	strlcpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->name));
703 	serio->write = synaptics_pt_write;
704 	serio->start = synaptics_pt_start;
705 	serio->stop = synaptics_pt_stop;
706 	serio->parent = psmouse->ps2dev.serio;
707 
708 	psmouse->pt_activate = synaptics_pt_activate;
709 
710 	psmouse_info(psmouse, "serio: %s port at %s\n",
711 		     serio->name, psmouse->phys);
712 	serio_register_port(serio);
713 }
714 
715 /*****************************************************************************
716  *	Functions to interpret the absolute mode packets
717  ****************************************************************************/
718 
719 static void synaptics_parse_agm(const u8 buf[],
720 				struct synaptics_data *priv,
721 				struct synaptics_hw_state *hw)
722 {
723 	struct synaptics_hw_state *agm = &priv->agm;
724 	int agm_packet_type;
725 
726 	agm_packet_type = (buf[5] & 0x30) >> 4;
727 	switch (agm_packet_type) {
728 	case 1:
729 		/* Gesture packet: (x, y, z) half resolution */
730 		agm->w = hw->w;
731 		agm->x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1;
732 		agm->y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1;
733 		agm->z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1;
734 		break;
735 
736 	case 2:
737 		/* AGM-CONTACT packet: we are only interested in the count */
738 		priv->agm_count = buf[1];
739 		break;
740 
741 	default:
742 		break;
743 	}
744 }
745 
746 static void synaptics_parse_ext_buttons(const u8 buf[],
747 					struct synaptics_data *priv,
748 					struct synaptics_hw_state *hw)
749 {
750 	unsigned int ext_bits =
751 		(SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1;
752 	unsigned int ext_mask = GENMASK(ext_bits - 1, 0);
753 
754 	hw->ext_buttons = buf[4] & ext_mask;
755 	hw->ext_buttons |= (buf[5] & ext_mask) << ext_bits;
756 }
757 
758 static int synaptics_parse_hw_state(const u8 buf[],
759 				    struct synaptics_data *priv,
760 				    struct synaptics_hw_state *hw)
761 {
762 	memset(hw, 0, sizeof(struct synaptics_hw_state));
763 
764 	if (SYN_MODEL_NEWABS(priv->info.model_id)) {
765 		hw->w = (((buf[0] & 0x30) >> 2) |
766 			 ((buf[0] & 0x04) >> 1) |
767 			 ((buf[3] & 0x04) >> 2));
768 
769 		if ((SYN_CAP_ADV_GESTURE(priv->info.ext_cap_0c) ||
770 			SYN_CAP_IMAGE_SENSOR(priv->info.ext_cap_0c)) &&
771 		    hw->w == 2) {
772 			synaptics_parse_agm(buf, priv, hw);
773 			return 1;
774 		}
775 
776 		hw->x = (((buf[3] & 0x10) << 8) |
777 			 ((buf[1] & 0x0f) << 8) |
778 			 buf[4]);
779 		hw->y = (((buf[3] & 0x20) << 7) |
780 			 ((buf[1] & 0xf0) << 4) |
781 			 buf[5]);
782 		hw->z = buf[2];
783 
784 		hw->left  = (buf[0] & 0x01) ? 1 : 0;
785 		hw->right = (buf[0] & 0x02) ? 1 : 0;
786 
787 		if (priv->is_forcepad) {
788 			/*
789 			 * ForcePads, like Clickpads, use middle button
790 			 * bits to report primary button clicks.
791 			 * Unfortunately they report primary button not
792 			 * only when user presses on the pad above certain
793 			 * threshold, but also when there are more than one
794 			 * finger on the touchpad, which interferes with
795 			 * out multi-finger gestures.
796 			 */
797 			if (hw->z == 0) {
798 				/* No contacts */
799 				priv->press = priv->report_press = false;
800 			} else if (hw->w >= 4 && ((buf[0] ^ buf[3]) & 0x01)) {
801 				/*
802 				 * Single-finger touch with pressure above
803 				 * the threshold. If pressure stays long
804 				 * enough, we'll start reporting primary
805 				 * button. We rely on the device continuing
806 				 * sending data even if finger does not
807 				 * move.
808 				 */
809 				if  (!priv->press) {
810 					priv->press_start = jiffies;
811 					priv->press = true;
812 				} else if (time_after(jiffies,
813 						priv->press_start +
814 							msecs_to_jiffies(50))) {
815 					priv->report_press = true;
816 				}
817 			} else {
818 				priv->press = false;
819 			}
820 
821 			hw->left = priv->report_press;
822 
823 		} else if (SYN_CAP_CLICKPAD(priv->info.ext_cap_0c)) {
824 			/*
825 			 * Clickpad's button is transmitted as middle button,
826 			 * however, since it is primary button, we will report
827 			 * it as BTN_LEFT.
828 			 */
829 			hw->left = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
830 
831 		} else if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities)) {
832 			hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
833 			if (hw->w == 2)
834 				hw->scroll = (s8)buf[1];
835 		}
836 
837 		if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) {
838 			hw->up   = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
839 			hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;
840 		}
841 
842 		if (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) > 0 &&
843 		    ((buf[0] ^ buf[3]) & 0x02)) {
844 			synaptics_parse_ext_buttons(buf, priv, hw);
845 		}
846 	} else {
847 		hw->x = (((buf[1] & 0x1f) << 8) | buf[2]);
848 		hw->y = (((buf[4] & 0x1f) << 8) | buf[5]);
849 
850 		hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F));
851 		hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1));
852 
853 		hw->left  = (buf[0] & 0x01) ? 1 : 0;
854 		hw->right = (buf[0] & 0x02) ? 1 : 0;
855 	}
856 
857 	/*
858 	 * Convert wrap-around values to negative. (X|Y)_MAX_POSITIVE
859 	 * is used by some firmware to indicate a finger at the edge of
860 	 * the touchpad whose precise position cannot be determined, so
861 	 * convert these values to the maximum axis value.
862 	 */
863 	if (hw->x > X_MAX_POSITIVE)
864 		hw->x -= 1 << ABS_POS_BITS;
865 	else if (hw->x == X_MAX_POSITIVE)
866 		hw->x = XMAX;
867 
868 	if (hw->y > Y_MAX_POSITIVE)
869 		hw->y -= 1 << ABS_POS_BITS;
870 	else if (hw->y == Y_MAX_POSITIVE)
871 		hw->y = YMAX;
872 
873 	return 0;
874 }
875 
876 static void synaptics_report_semi_mt_slot(struct input_dev *dev, int slot,
877 					  bool active, int x, int y)
878 {
879 	input_mt_slot(dev, slot);
880 	input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
881 	if (active) {
882 		input_report_abs(dev, ABS_MT_POSITION_X, x);
883 		input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(y));
884 	}
885 }
886 
887 static void synaptics_report_semi_mt_data(struct input_dev *dev,
888 					  const struct synaptics_hw_state *a,
889 					  const struct synaptics_hw_state *b,
890 					  int num_fingers)
891 {
892 	if (num_fingers >= 2) {
893 		synaptics_report_semi_mt_slot(dev, 0, true, min(a->x, b->x),
894 					      min(a->y, b->y));
895 		synaptics_report_semi_mt_slot(dev, 1, true, max(a->x, b->x),
896 					      max(a->y, b->y));
897 	} else if (num_fingers == 1) {
898 		synaptics_report_semi_mt_slot(dev, 0, true, a->x, a->y);
899 		synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
900 	} else {
901 		synaptics_report_semi_mt_slot(dev, 0, false, 0, 0);
902 		synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
903 	}
904 }
905 
906 static void synaptics_report_ext_buttons(struct psmouse *psmouse,
907 					 const struct synaptics_hw_state *hw)
908 {
909 	struct input_dev *dev = psmouse->dev;
910 	struct synaptics_data *priv = psmouse->private;
911 	int ext_bits = (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1;
912 	int i;
913 
914 	if (!SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap))
915 		return;
916 
917 	/* Bug in FW 8.1 & 8.2, buttons are reported only when ExtBit is 1 */
918 	if ((SYN_ID_FULL(priv->info.identity) == 0x801 ||
919 	     SYN_ID_FULL(priv->info.identity) == 0x802) &&
920 	    !((psmouse->packet[0] ^ psmouse->packet[3]) & 0x02))
921 		return;
922 
923 	if (!SYN_CAP_EXT_BUTTONS_STICK(priv->info.ext_cap_10)) {
924 		for (i = 0; i < ext_bits; i++) {
925 			input_report_key(dev, BTN_0 + 2 * i,
926 				hw->ext_buttons & BIT(i));
927 			input_report_key(dev, BTN_1 + 2 * i,
928 				hw->ext_buttons & BIT(i + ext_bits));
929 		}
930 		return;
931 	}
932 
933 	/*
934 	 * This generation of touchpads has the trackstick buttons
935 	 * physically wired to the touchpad. Re-route them through
936 	 * the pass-through interface.
937 	 */
938 	if (priv->pt_port) {
939 		u8 pt_buttons;
940 
941 		/* The trackstick expects at most 3 buttons */
942 		pt_buttons = SYN_EXT_BUTTON_STICK_L(hw->ext_buttons)      |
943 			     SYN_EXT_BUTTON_STICK_R(hw->ext_buttons) << 1 |
944 			     SYN_EXT_BUTTON_STICK_M(hw->ext_buttons) << 2;
945 
946 		serio_interrupt(priv->pt_port,
947 				PSMOUSE_OOB_EXTRA_BTNS, SERIO_OOB_DATA);
948 		serio_interrupt(priv->pt_port, pt_buttons, SERIO_OOB_DATA);
949 	}
950 }
951 
952 static void synaptics_report_buttons(struct psmouse *psmouse,
953 				     const struct synaptics_hw_state *hw)
954 {
955 	struct input_dev *dev = psmouse->dev;
956 	struct synaptics_data *priv = psmouse->private;
957 
958 	input_report_key(dev, BTN_LEFT, hw->left);
959 	input_report_key(dev, BTN_RIGHT, hw->right);
960 
961 	if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities))
962 		input_report_key(dev, BTN_MIDDLE, hw->middle);
963 
964 	if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) {
965 		input_report_key(dev, BTN_FORWARD, hw->up);
966 		input_report_key(dev, BTN_BACK, hw->down);
967 	}
968 
969 	synaptics_report_ext_buttons(psmouse, hw);
970 }
971 
972 static void synaptics_report_mt_data(struct psmouse *psmouse,
973 				     const struct synaptics_hw_state *sgm,
974 				     int num_fingers)
975 {
976 	struct input_dev *dev = psmouse->dev;
977 	struct synaptics_data *priv = psmouse->private;
978 	const struct synaptics_hw_state *hw[2] = { sgm, &priv->agm };
979 	struct input_mt_pos pos[2];
980 	int slot[2], nsemi, i;
981 
982 	nsemi = clamp_val(num_fingers, 0, 2);
983 
984 	for (i = 0; i < nsemi; i++) {
985 		pos[i].x = hw[i]->x;
986 		pos[i].y = synaptics_invert_y(hw[i]->y);
987 	}
988 
989 	input_mt_assign_slots(dev, slot, pos, nsemi, DMAX * priv->info.x_res);
990 
991 	for (i = 0; i < nsemi; i++) {
992 		input_mt_slot(dev, slot[i]);
993 		input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
994 		input_report_abs(dev, ABS_MT_POSITION_X, pos[i].x);
995 		input_report_abs(dev, ABS_MT_POSITION_Y, pos[i].y);
996 		input_report_abs(dev, ABS_MT_PRESSURE, hw[i]->z);
997 	}
998 
999 	input_mt_drop_unused(dev);
1000 
1001 	/* Don't use active slot count to generate BTN_TOOL events. */
1002 	input_mt_report_pointer_emulation(dev, false);
1003 
1004 	/* Send the number of fingers reported by touchpad itself. */
1005 	input_mt_report_finger_count(dev, num_fingers);
1006 
1007 	synaptics_report_buttons(psmouse, sgm);
1008 
1009 	input_sync(dev);
1010 }
1011 
1012 static void synaptics_image_sensor_process(struct psmouse *psmouse,
1013 					   struct synaptics_hw_state *sgm)
1014 {
1015 	struct synaptics_data *priv = psmouse->private;
1016 	int num_fingers;
1017 
1018 	/*
1019 	 * Update mt_state using the new finger count and current mt_state.
1020 	 */
1021 	if (sgm->z == 0)
1022 		num_fingers = 0;
1023 	else if (sgm->w >= 4)
1024 		num_fingers = 1;
1025 	else if (sgm->w == 0)
1026 		num_fingers = 2;
1027 	else if (sgm->w == 1)
1028 		num_fingers = priv->agm_count ? priv->agm_count : 3;
1029 	else
1030 		num_fingers = 4;
1031 
1032 	/* Send resulting input events to user space */
1033 	synaptics_report_mt_data(psmouse, sgm, num_fingers);
1034 }
1035 
1036 /*
1037  *  called for each full received packet from the touchpad
1038  */
1039 static void synaptics_process_packet(struct psmouse *psmouse)
1040 {
1041 	struct input_dev *dev = psmouse->dev;
1042 	struct synaptics_data *priv = psmouse->private;
1043 	struct synaptics_device_info *info = &priv->info;
1044 	struct synaptics_hw_state hw;
1045 	int num_fingers;
1046 	int finger_width;
1047 
1048 	if (synaptics_parse_hw_state(psmouse->packet, priv, &hw))
1049 		return;
1050 
1051 	if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) {
1052 		synaptics_image_sensor_process(psmouse, &hw);
1053 		return;
1054 	}
1055 
1056 	if (hw.scroll) {
1057 		priv->scroll += hw.scroll;
1058 
1059 		while (priv->scroll >= 4) {
1060 			input_report_key(dev, BTN_BACK, !hw.down);
1061 			input_sync(dev);
1062 			input_report_key(dev, BTN_BACK, hw.down);
1063 			input_sync(dev);
1064 			priv->scroll -= 4;
1065 		}
1066 		while (priv->scroll <= -4) {
1067 			input_report_key(dev, BTN_FORWARD, !hw.up);
1068 			input_sync(dev);
1069 			input_report_key(dev, BTN_FORWARD, hw.up);
1070 			input_sync(dev);
1071 			priv->scroll += 4;
1072 		}
1073 		return;
1074 	}
1075 
1076 	if (hw.z > 0 && hw.x > 1) {
1077 		num_fingers = 1;
1078 		finger_width = 5;
1079 		if (SYN_CAP_EXTENDED(info->capabilities)) {
1080 			switch (hw.w) {
1081 			case 0 ... 1:
1082 				if (SYN_CAP_MULTIFINGER(info->capabilities))
1083 					num_fingers = hw.w + 2;
1084 				break;
1085 			case 2:
1086 				if (SYN_MODEL_PEN(info->model_id))
1087 					;   /* Nothing, treat a pen as a single finger */
1088 				break;
1089 			case 4 ... 15:
1090 				if (SYN_CAP_PALMDETECT(info->capabilities))
1091 					finger_width = hw.w;
1092 				break;
1093 			}
1094 		}
1095 	} else {
1096 		num_fingers = 0;
1097 		finger_width = 0;
1098 	}
1099 
1100 	if (cr48_profile_sensor) {
1101 		synaptics_report_mt_data(psmouse, &hw, num_fingers);
1102 		return;
1103 	}
1104 
1105 	if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c))
1106 		synaptics_report_semi_mt_data(dev, &hw, &priv->agm,
1107 					      num_fingers);
1108 
1109 	/* Post events
1110 	 * BTN_TOUCH has to be first as mousedev relies on it when doing
1111 	 * absolute -> relative conversion
1112 	 */
1113 	if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
1114 	if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
1115 
1116 	if (num_fingers > 0) {
1117 		input_report_abs(dev, ABS_X, hw.x);
1118 		input_report_abs(dev, ABS_Y, synaptics_invert_y(hw.y));
1119 	}
1120 	input_report_abs(dev, ABS_PRESSURE, hw.z);
1121 
1122 	if (SYN_CAP_PALMDETECT(info->capabilities))
1123 		input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
1124 
1125 	input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
1126 	if (SYN_CAP_MULTIFINGER(info->capabilities)) {
1127 		input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
1128 		input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
1129 	}
1130 
1131 	synaptics_report_buttons(psmouse, &hw);
1132 
1133 	input_sync(dev);
1134 }
1135 
1136 static bool synaptics_validate_byte(struct psmouse *psmouse,
1137 				    int idx, enum synaptics_pkt_type pkt_type)
1138 {
1139 	static const u8 newabs_mask[]	  = { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
1140 	static const u8 newabs_rel_mask[] = { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
1141 	static const u8 newabs_rslt[]	  = { 0x80, 0x00, 0x00, 0xC0, 0x00 };
1142 	static const u8 oldabs_mask[]	  = { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
1143 	static const u8 oldabs_rslt[]	  = { 0xC0, 0x00, 0x00, 0x80, 0x00 };
1144 	const u8 *packet = psmouse->packet;
1145 
1146 	if (idx < 0 || idx > 4)
1147 		return false;
1148 
1149 	switch (pkt_type) {
1150 
1151 	case SYN_NEWABS:
1152 	case SYN_NEWABS_RELAXED:
1153 		return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
1154 
1155 	case SYN_NEWABS_STRICT:
1156 		return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
1157 
1158 	case SYN_OLDABS:
1159 		return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
1160 
1161 	default:
1162 		psmouse_err(psmouse, "unknown packet type %d\n", pkt_type);
1163 		return false;
1164 	}
1165 }
1166 
1167 static enum synaptics_pkt_type
1168 synaptics_detect_pkt_type(struct psmouse *psmouse)
1169 {
1170 	int i;
1171 
1172 	for (i = 0; i < 5; i++) {
1173 		if (!synaptics_validate_byte(psmouse, i, SYN_NEWABS_STRICT)) {
1174 			psmouse_info(psmouse, "using relaxed packet validation\n");
1175 			return SYN_NEWABS_RELAXED;
1176 		}
1177 	}
1178 
1179 	return SYN_NEWABS_STRICT;
1180 }
1181 
1182 static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
1183 {
1184 	struct synaptics_data *priv = psmouse->private;
1185 
1186 	if (psmouse->pktcnt >= 6) { /* Full packet received */
1187 		if (unlikely(priv->pkt_type == SYN_NEWABS))
1188 			priv->pkt_type = synaptics_detect_pkt_type(psmouse);
1189 
1190 		if (SYN_CAP_PASS_THROUGH(priv->info.capabilities) &&
1191 		    synaptics_is_pt_packet(psmouse->packet)) {
1192 			if (priv->pt_port)
1193 				synaptics_pass_pt_packet(priv->pt_port,
1194 							 psmouse->packet);
1195 		} else
1196 			synaptics_process_packet(psmouse);
1197 
1198 		return PSMOUSE_FULL_PACKET;
1199 	}
1200 
1201 	return synaptics_validate_byte(psmouse, psmouse->pktcnt - 1, priv->pkt_type) ?
1202 		PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
1203 }
1204 
1205 /*****************************************************************************
1206  *	Driver initialization/cleanup functions
1207  ****************************************************************************/
1208 static void set_abs_position_params(struct input_dev *dev,
1209 				    struct synaptics_device_info *info,
1210 				    int x_code, int y_code)
1211 {
1212 	int x_min = info->x_min ?: XMIN_NOMINAL;
1213 	int x_max = info->x_max ?: XMAX_NOMINAL;
1214 	int y_min = info->y_min ?: YMIN_NOMINAL;
1215 	int y_max = info->y_max ?: YMAX_NOMINAL;
1216 	int fuzz = SYN_CAP_REDUCED_FILTERING(info->ext_cap_0c) ?
1217 			SYN_REDUCED_FILTER_FUZZ : 0;
1218 
1219 	input_set_abs_params(dev, x_code, x_min, x_max, fuzz, 0);
1220 	input_set_abs_params(dev, y_code, y_min, y_max, fuzz, 0);
1221 	input_abs_set_res(dev, x_code, info->x_res);
1222 	input_abs_set_res(dev, y_code, info->y_res);
1223 }
1224 
1225 static void set_input_params(struct psmouse *psmouse,
1226 			     struct synaptics_data *priv)
1227 {
1228 	struct input_dev *dev = psmouse->dev;
1229 	struct synaptics_device_info *info = &priv->info;
1230 	int i;
1231 
1232 	/* Things that apply to both modes */
1233 	__set_bit(INPUT_PROP_POINTER, dev->propbit);
1234 	__set_bit(EV_KEY, dev->evbit);
1235 	__set_bit(BTN_LEFT, dev->keybit);
1236 	__set_bit(BTN_RIGHT, dev->keybit);
1237 
1238 	if (SYN_CAP_MIDDLE_BUTTON(info->capabilities))
1239 		__set_bit(BTN_MIDDLE, dev->keybit);
1240 
1241 	if (!priv->absolute_mode) {
1242 		/* Relative mode */
1243 		__set_bit(EV_REL, dev->evbit);
1244 		__set_bit(REL_X, dev->relbit);
1245 		__set_bit(REL_Y, dev->relbit);
1246 		return;
1247 	}
1248 
1249 	/* Absolute mode */
1250 	__set_bit(EV_ABS, dev->evbit);
1251 	set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y);
1252 	input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
1253 
1254 	if (cr48_profile_sensor)
1255 		input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1256 
1257 	if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) {
1258 		set_abs_position_params(dev, info,
1259 					ABS_MT_POSITION_X, ABS_MT_POSITION_Y);
1260 		/* Image sensors can report per-contact pressure */
1261 		input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1262 		input_mt_init_slots(dev, 2, INPUT_MT_POINTER | INPUT_MT_TRACK);
1263 
1264 		/* Image sensors can signal 4 and 5 finger clicks */
1265 		__set_bit(BTN_TOOL_QUADTAP, dev->keybit);
1266 		__set_bit(BTN_TOOL_QUINTTAP, dev->keybit);
1267 	} else if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c)) {
1268 		set_abs_position_params(dev, info,
1269 					ABS_MT_POSITION_X, ABS_MT_POSITION_Y);
1270 		/*
1271 		 * Profile sensor in CR-48 tracks contacts reasonably well,
1272 		 * other non-image sensors with AGM use semi-mt.
1273 		 */
1274 		input_mt_init_slots(dev, 2,
1275 				    INPUT_MT_POINTER |
1276 				    (cr48_profile_sensor ?
1277 					INPUT_MT_TRACK : INPUT_MT_SEMI_MT));
1278 	}
1279 
1280 	if (SYN_CAP_PALMDETECT(info->capabilities))
1281 		input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
1282 
1283 	__set_bit(BTN_TOUCH, dev->keybit);
1284 	__set_bit(BTN_TOOL_FINGER, dev->keybit);
1285 
1286 	if (SYN_CAP_MULTIFINGER(info->capabilities)) {
1287 		__set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
1288 		__set_bit(BTN_TOOL_TRIPLETAP, dev->keybit);
1289 	}
1290 
1291 	if (SYN_CAP_FOUR_BUTTON(info->capabilities) ||
1292 	    SYN_CAP_MIDDLE_BUTTON(info->capabilities)) {
1293 		__set_bit(BTN_FORWARD, dev->keybit);
1294 		__set_bit(BTN_BACK, dev->keybit);
1295 	}
1296 
1297 	if (!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10))
1298 		for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(info->ext_cap); i++)
1299 			__set_bit(BTN_0 + i, dev->keybit);
1300 
1301 	__clear_bit(EV_REL, dev->evbit);
1302 	__clear_bit(REL_X, dev->relbit);
1303 	__clear_bit(REL_Y, dev->relbit);
1304 
1305 	if (SYN_CAP_CLICKPAD(info->ext_cap_0c)) {
1306 		__set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
1307 		if (psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1308 		    !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10))
1309 			__set_bit(INPUT_PROP_TOPBUTTONPAD, dev->propbit);
1310 		/* Clickpads report only left button */
1311 		__clear_bit(BTN_RIGHT, dev->keybit);
1312 		__clear_bit(BTN_MIDDLE, dev->keybit);
1313 	}
1314 }
1315 
1316 static ssize_t synaptics_show_disable_gesture(struct psmouse *psmouse,
1317 					      void *data, char *buf)
1318 {
1319 	struct synaptics_data *priv = psmouse->private;
1320 
1321 	return sprintf(buf, "%c\n", priv->disable_gesture ? '1' : '0');
1322 }
1323 
1324 static ssize_t synaptics_set_disable_gesture(struct psmouse *psmouse,
1325 					     void *data, const char *buf,
1326 					     size_t len)
1327 {
1328 	struct synaptics_data *priv = psmouse->private;
1329 	unsigned int value;
1330 	int err;
1331 
1332 	err = kstrtouint(buf, 10, &value);
1333 	if (err)
1334 		return err;
1335 
1336 	if (value > 1)
1337 		return -EINVAL;
1338 
1339 	if (value == priv->disable_gesture)
1340 		return len;
1341 
1342 	priv->disable_gesture = value;
1343 	if (value)
1344 		priv->mode |= SYN_BIT_DISABLE_GESTURE;
1345 	else
1346 		priv->mode &= ~SYN_BIT_DISABLE_GESTURE;
1347 
1348 	if (synaptics_mode_cmd(psmouse, priv->mode))
1349 		return -EIO;
1350 
1351 	return len;
1352 }
1353 
1354 PSMOUSE_DEFINE_ATTR(disable_gesture, S_IWUSR | S_IRUGO, NULL,
1355 		    synaptics_show_disable_gesture,
1356 		    synaptics_set_disable_gesture);
1357 
1358 static void synaptics_disconnect(struct psmouse *psmouse)
1359 {
1360 	struct synaptics_data *priv = psmouse->private;
1361 
1362 	/*
1363 	 * We might have left a breadcrumb when trying to
1364 	 * set up SMbus companion.
1365 	 */
1366 	psmouse_smbus_cleanup(psmouse);
1367 
1368 	if (!priv->absolute_mode &&
1369 			SYN_ID_DISGEST_SUPPORTED(priv->info.identity))
1370 		device_remove_file(&psmouse->ps2dev.serio->dev,
1371 				   &psmouse_attr_disable_gesture.dattr);
1372 
1373 	synaptics_reset(psmouse);
1374 	kfree(priv);
1375 	psmouse->private = NULL;
1376 }
1377 
1378 static int synaptics_reconnect(struct psmouse *psmouse)
1379 {
1380 	struct synaptics_data *priv = psmouse->private;
1381 	struct synaptics_device_info info;
1382 	u8 param[2];
1383 	int retry = 0;
1384 	int error;
1385 
1386 	do {
1387 		psmouse_reset(psmouse);
1388 		if (retry) {
1389 			/*
1390 			 * On some boxes, right after resuming, the touchpad
1391 			 * needs some time to finish initializing (I assume
1392 			 * it needs time to calibrate) and start responding
1393 			 * to Synaptics-specific queries, so let's wait a
1394 			 * bit.
1395 			 */
1396 			ssleep(1);
1397 		}
1398 		ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETID);
1399 		error = synaptics_detect(psmouse, 0);
1400 	} while (error && ++retry < 3);
1401 
1402 	if (error)
1403 		return error;
1404 
1405 	if (retry > 1)
1406 		psmouse_dbg(psmouse, "reconnected after %d tries\n", retry);
1407 
1408 	error = synaptics_query_hardware(psmouse, &info);
1409 	if (error) {
1410 		psmouse_err(psmouse, "Unable to query device.\n");
1411 		return error;
1412 	}
1413 
1414 	error = synaptics_set_mode(psmouse);
1415 	if (error) {
1416 		psmouse_err(psmouse, "Unable to initialize device.\n");
1417 		return error;
1418 	}
1419 
1420 	if (info.identity != priv->info.identity ||
1421 	    info.model_id != priv->info.model_id ||
1422 	    info.capabilities != priv->info.capabilities ||
1423 	    info.ext_cap != priv->info.ext_cap) {
1424 		psmouse_err(psmouse,
1425 			    "hardware appears to be different: id(%u-%u), model(%u-%u), caps(%x-%x), ext(%x-%x).\n",
1426 			    priv->info.identity, info.identity,
1427 			    priv->info.model_id, info.model_id,
1428 			    priv->info.capabilities, info.capabilities,
1429 			    priv->info.ext_cap, info.ext_cap);
1430 		return -ENXIO;
1431 	}
1432 
1433 	return 0;
1434 }
1435 
1436 static bool impaired_toshiba_kbc;
1437 
1438 static const struct dmi_system_id toshiba_dmi_table[] __initconst = {
1439 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1440 	{
1441 		/* Toshiba Satellite */
1442 		.matches = {
1443 			DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1444 			DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
1445 		},
1446 	},
1447 	{
1448 		/* Toshiba Dynabook */
1449 		.matches = {
1450 			DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1451 			DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"),
1452 		},
1453 	},
1454 	{
1455 		/* Toshiba Portege M300 */
1456 		.matches = {
1457 			DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1458 			DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"),
1459 		},
1460 
1461 	},
1462 	{
1463 		/* Toshiba Portege M300 */
1464 		.matches = {
1465 			DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1466 			DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"),
1467 			DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"),
1468 		},
1469 
1470 	},
1471 #endif
1472 	{ }
1473 };
1474 
1475 static bool broken_olpc_ec;
1476 
1477 static const struct dmi_system_id olpc_dmi_table[] __initconst = {
1478 #if defined(CONFIG_DMI) && defined(CONFIG_OLPC)
1479 	{
1480 		/* OLPC XO-1 or XO-1.5 */
1481 		.matches = {
1482 			DMI_MATCH(DMI_SYS_VENDOR, "OLPC"),
1483 			DMI_MATCH(DMI_PRODUCT_NAME, "XO"),
1484 		},
1485 	},
1486 #endif
1487 	{ }
1488 };
1489 
1490 static const struct dmi_system_id __initconst cr48_dmi_table[] = {
1491 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1492 	{
1493 		/* Cr-48 Chromebook (Codename Mario) */
1494 		.matches = {
1495 			DMI_MATCH(DMI_SYS_VENDOR, "IEC"),
1496 			DMI_MATCH(DMI_PRODUCT_NAME, "Mario"),
1497 		},
1498 	},
1499 #endif
1500 	{ }
1501 };
1502 
1503 void __init synaptics_module_init(void)
1504 {
1505 	impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table);
1506 	broken_olpc_ec = dmi_check_system(olpc_dmi_table);
1507 	cr48_profile_sensor = dmi_check_system(cr48_dmi_table);
1508 }
1509 
1510 static int synaptics_init_ps2(struct psmouse *psmouse,
1511 			      struct synaptics_device_info *info,
1512 			      bool absolute_mode)
1513 {
1514 	struct synaptics_data *priv;
1515 	int err;
1516 
1517 	synaptics_apply_quirks(psmouse, info);
1518 
1519 	psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL);
1520 	if (!priv)
1521 		return -ENOMEM;
1522 
1523 	priv->info = *info;
1524 	priv->absolute_mode = absolute_mode;
1525 	if (SYN_ID_DISGEST_SUPPORTED(info->identity))
1526 		priv->disable_gesture = true;
1527 
1528 	/*
1529 	 * Unfortunately ForcePad capability is not exported over PS/2,
1530 	 * so we have to resort to checking PNP IDs.
1531 	 */
1532 	priv->is_forcepad = psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids);
1533 
1534 	err = synaptics_set_mode(psmouse);
1535 	if (err) {
1536 		psmouse_err(psmouse, "Unable to initialize device.\n");
1537 		goto init_fail;
1538 	}
1539 
1540 	priv->pkt_type = SYN_MODEL_NEWABS(info->model_id) ?
1541 					SYN_NEWABS : SYN_OLDABS;
1542 
1543 	psmouse_info(psmouse,
1544 		     "Touchpad model: %lu, fw: %lu.%lu, id: %#x, caps: %#x/%#x/%#x/%#x, board id: %u, fw id: %u\n",
1545 		     SYN_ID_MODEL(info->identity),
1546 		     SYN_ID_MAJOR(info->identity), SYN_ID_MINOR(info->identity),
1547 		     info->model_id,
1548 		     info->capabilities, info->ext_cap, info->ext_cap_0c,
1549 		     info->ext_cap_10, info->board_id, info->firmware_id);
1550 
1551 	set_input_params(psmouse, priv);
1552 
1553 	/*
1554 	 * Encode touchpad model so that it can be used to set
1555 	 * input device->id.version and be visible to userspace.
1556 	 * Because version is __u16 we have to drop something.
1557 	 * Hardware info bits seem to be good candidates as they
1558 	 * are documented to be for Synaptics corp. internal use.
1559 	 */
1560 	psmouse->model = ((info->model_id & 0x00ff0000) >> 8) |
1561 			  (info->model_id & 0x000000ff);
1562 
1563 	if (absolute_mode) {
1564 		psmouse->protocol_handler = synaptics_process_byte;
1565 		psmouse->pktsize = 6;
1566 	} else {
1567 		/* Relative mode follows standard PS/2 mouse protocol */
1568 		psmouse->protocol_handler = psmouse_process_byte;
1569 		psmouse->pktsize = 3;
1570 	}
1571 
1572 	psmouse->set_rate = synaptics_set_rate;
1573 	psmouse->disconnect = synaptics_disconnect;
1574 	psmouse->reconnect = synaptics_reconnect;
1575 	psmouse->cleanup = synaptics_reset;
1576 	/* Synaptics can usually stay in sync without extra help */
1577 	psmouse->resync_time = 0;
1578 
1579 	if (SYN_CAP_PASS_THROUGH(info->capabilities))
1580 		synaptics_pt_create(psmouse);
1581 
1582 	/*
1583 	 * Toshiba's KBC seems to have trouble handling data from
1584 	 * Synaptics at full rate.  Switch to a lower rate (roughly
1585 	 * the same rate as a standard PS/2 mouse).
1586 	 */
1587 	if (psmouse->rate >= 80 && impaired_toshiba_kbc) {
1588 		psmouse_info(psmouse,
1589 			     "Toshiba %s detected, limiting rate to 40pps.\n",
1590 			     dmi_get_system_info(DMI_PRODUCT_NAME));
1591 		psmouse->rate = 40;
1592 	}
1593 
1594 	if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(info->identity)) {
1595 		err = device_create_file(&psmouse->ps2dev.serio->dev,
1596 					 &psmouse_attr_disable_gesture.dattr);
1597 		if (err) {
1598 			psmouse_err(psmouse,
1599 				    "Failed to create disable_gesture attribute (%d)",
1600 				    err);
1601 			goto init_fail;
1602 		}
1603 	}
1604 
1605 	return 0;
1606 
1607  init_fail:
1608 	kfree(priv);
1609 	return err;
1610 }
1611 
1612 static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode)
1613 {
1614 	struct synaptics_device_info info;
1615 	int error;
1616 
1617 	psmouse_reset(psmouse);
1618 
1619 	error = synaptics_query_hardware(psmouse, &info);
1620 	if (error) {
1621 		psmouse_err(psmouse, "Unable to query device: %d\n", error);
1622 		return error;
1623 	}
1624 
1625 	return synaptics_init_ps2(psmouse, &info, absolute_mode);
1626 }
1627 
1628 int synaptics_init_absolute(struct psmouse *psmouse)
1629 {
1630 	return __synaptics_init(psmouse, true);
1631 }
1632 
1633 int synaptics_init_relative(struct psmouse *psmouse)
1634 {
1635 	return __synaptics_init(psmouse, false);
1636 }
1637 
1638 static int synaptics_setup_ps2(struct psmouse *psmouse,
1639 			       struct synaptics_device_info *info)
1640 {
1641 	bool absolute_mode = true;
1642 	int error;
1643 
1644 	/*
1645 	 * The OLPC XO has issues with Synaptics' absolute mode; the constant
1646 	 * packet spew overloads the EC such that key presses on the keyboard
1647 	 * are missed.  Given that, don't even attempt to use Absolute mode.
1648 	 * Relative mode seems to work just fine.
1649 	 */
1650 	if (broken_olpc_ec) {
1651 		psmouse_info(psmouse,
1652 			     "OLPC XO detected, forcing relative protocol.\n");
1653 		absolute_mode = false;
1654 	}
1655 
1656 	error = synaptics_init_ps2(psmouse, info, absolute_mode);
1657 	if (error)
1658 		return error;
1659 
1660 	return absolute_mode ? PSMOUSE_SYNAPTICS : PSMOUSE_SYNAPTICS_RELATIVE;
1661 }
1662 
1663 #else /* CONFIG_MOUSE_PS2_SYNAPTICS */
1664 
1665 void __init synaptics_module_init(void)
1666 {
1667 }
1668 
1669 static int __maybe_unused
1670 synaptics_setup_ps2(struct psmouse *psmouse,
1671 		    struct synaptics_device_info *info)
1672 {
1673 	return -ENOSYS;
1674 }
1675 
1676 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS */
1677 
1678 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS
1679 
1680 /*
1681  * The newest Synaptics device can use a secondary bus (called InterTouch) which
1682  * provides a better bandwidth and allow a better control of the touchpads.
1683  * This is used to decide if we need to use this bus or not.
1684  */
1685 enum {
1686 	SYNAPTICS_INTERTOUCH_NOT_SET = -1,
1687 	SYNAPTICS_INTERTOUCH_OFF,
1688 	SYNAPTICS_INTERTOUCH_ON,
1689 };
1690 
1691 static int synaptics_intertouch = IS_ENABLED(CONFIG_RMI4_SMB) ?
1692 		SYNAPTICS_INTERTOUCH_NOT_SET : SYNAPTICS_INTERTOUCH_OFF;
1693 module_param_named(synaptics_intertouch, synaptics_intertouch, int, 0644);
1694 MODULE_PARM_DESC(synaptics_intertouch, "Use a secondary bus for the Synaptics device.");
1695 
1696 static int synaptics_create_intertouch(struct psmouse *psmouse,
1697 				       struct synaptics_device_info *info,
1698 				       bool leave_breadcrumbs)
1699 {
1700 	bool topbuttonpad =
1701 		psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1702 		!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10);
1703 	const struct rmi_device_platform_data pdata = {
1704 		.sensor_pdata = {
1705 			.sensor_type = rmi_sensor_touchpad,
1706 			.axis_align.flip_y = true,
1707 			/* to prevent cursors jumps: */
1708 			.kernel_tracking = true,
1709 			.topbuttonpad = topbuttonpad,
1710 		},
1711 		.f30_data = {
1712 			.buttonpad = SYN_CAP_CLICKPAD(info->ext_cap_0c),
1713 			.trackstick_buttons =
1714 				!!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10),
1715 		},
1716 	};
1717 	const struct i2c_board_info intertouch_board = {
1718 		I2C_BOARD_INFO("rmi4_smbus", 0x2c),
1719 		.flags = I2C_CLIENT_HOST_NOTIFY,
1720 	};
1721 
1722 	return psmouse_smbus_init(psmouse, &intertouch_board,
1723 				  &pdata, sizeof(pdata),
1724 				  leave_breadcrumbs);
1725 }
1726 
1727 /**
1728  * synaptics_setup_intertouch - called once the PS/2 devices are enumerated
1729  * and decides to instantiate a SMBus InterTouch device.
1730  */
1731 static int synaptics_setup_intertouch(struct psmouse *psmouse,
1732 				      struct synaptics_device_info *info,
1733 				      bool leave_breadcrumbs)
1734 {
1735 	int error;
1736 
1737 	if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_OFF)
1738 		return -ENXIO;
1739 
1740 	if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_NOT_SET) {
1741 		if (!psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1742 		    !psmouse_matches_pnp_id(psmouse, smbus_pnp_ids)) {
1743 
1744 			if (!psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids))
1745 				psmouse_info(psmouse,
1746 					     "Your touchpad (%s) says it can support a different bus. "
1747 					     "If i2c-hid and hid-rmi are not used, you might want to try setting psmouse.synaptics_intertouch to 1 and report this to linux-input@vger.kernel.org.\n",
1748 					     psmouse->ps2dev.serio->firmware_id);
1749 
1750 			return -ENXIO;
1751 		}
1752 	}
1753 
1754 	psmouse_info(psmouse, "Trying to set up SMBus access\n");
1755 
1756 	error = synaptics_create_intertouch(psmouse, info, leave_breadcrumbs);
1757 	if (error) {
1758 		if (error == -EAGAIN)
1759 			psmouse_info(psmouse, "SMbus companion is not ready yet\n");
1760 		else
1761 			psmouse_err(psmouse, "unable to create intertouch device\n");
1762 
1763 		return error;
1764 	}
1765 
1766 	return 0;
1767 }
1768 
1769 int synaptics_init_smbus(struct psmouse *psmouse)
1770 {
1771 	struct synaptics_device_info info;
1772 	int error;
1773 
1774 	psmouse_reset(psmouse);
1775 
1776 	error = synaptics_query_hardware(psmouse, &info);
1777 	if (error) {
1778 		psmouse_err(psmouse, "Unable to query device: %d\n", error);
1779 		return error;
1780 	}
1781 
1782 	if (!SYN_CAP_INTERTOUCH(info.ext_cap_0c))
1783 		return -ENXIO;
1784 
1785 	return synaptics_create_intertouch(psmouse, &info, false);
1786 }
1787 
1788 #else /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1789 
1790 static int __maybe_unused
1791 synaptics_setup_intertouch(struct psmouse *psmouse,
1792 			   struct synaptics_device_info *info,
1793 			   bool leave_breadcrumbs)
1794 {
1795 	return -ENOSYS;
1796 }
1797 
1798 int synaptics_init_smbus(struct psmouse *psmouse)
1799 {
1800 	return -ENOSYS;
1801 }
1802 
1803 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1804 
1805 #if defined(CONFIG_MOUSE_PS2_SYNAPTICS) || \
1806     defined(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)
1807 
1808 int synaptics_init(struct psmouse *psmouse)
1809 {
1810 	struct synaptics_device_info info;
1811 	int error;
1812 	int retval;
1813 
1814 	psmouse_reset(psmouse);
1815 
1816 	error = synaptics_query_hardware(psmouse, &info);
1817 	if (error) {
1818 		psmouse_err(psmouse, "Unable to query device: %d\n", error);
1819 		return error;
1820 	}
1821 
1822 	if (SYN_CAP_INTERTOUCH(info.ext_cap_0c)) {
1823 		if ((!IS_ENABLED(CONFIG_RMI4_SMB) ||
1824 		     !IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)) &&
1825 		    /* Forcepads need F21, which is not ready */
1826 		    !psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids)) {
1827 			psmouse_warn(psmouse,
1828 				     "The touchpad can support a better bus than the too old PS/2 protocol. "
1829 				     "Make sure MOUSE_PS2_SYNAPTICS_SMBUS and RMI4_SMB are enabled to get a better touchpad experience.\n");
1830 		}
1831 
1832 		error = synaptics_setup_intertouch(psmouse, &info, true);
1833 		if (!error)
1834 			return PSMOUSE_SYNAPTICS_SMBUS;
1835 	}
1836 
1837 	retval = synaptics_setup_ps2(psmouse, &info);
1838 	if (retval < 0) {
1839 		/*
1840 		 * Not using any flavor of Synaptics support, so clean up
1841 		 * SMbus breadcrumbs, if any.
1842 		 */
1843 		psmouse_smbus_cleanup(psmouse);
1844 	}
1845 
1846 	return retval;
1847 }
1848 
1849 #else /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1850 
1851 int synaptics_init(struct psmouse *psmouse)
1852 {
1853 	return -ENOSYS;
1854 }
1855 
1856 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1857