1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * Synaptics TouchPad PS/2 mouse driver
   4 *
   5 *   2003 Dmitry Torokhov <dtor@mail.ru>
   6 *     Added support for pass-through port. Special thanks to Peter Berg Larsen
   7 *     for explaining various Synaptics quirks.
   8 *
   9 *   2003 Peter Osterlund <petero2@telia.com>
  10 *     Ported to 2.5 input device infrastructure.
  11 *
  12 *   Copyright (C) 2001 Stefan Gmeiner <riddlebox@freesurf.ch>
  13 *     start merging tpconfig and gpm code to a xfree-input module
  14 *     adding some changes and extensions (ex. 3rd and 4th button)
  15 *
  16 *   Copyright (c) 1997 C. Scott Ananian <cananian@alumni.priceton.edu>
  17 *   Copyright (c) 1998-2000 Bruce Kalk <kall@compass.com>
  18 *     code for the special synaptics commands (from the tpconfig-source)
  19 *
  20 * Trademarks are the property of their respective owners.
  21 */
  22
  23#include <linux/module.h>
  24#include <linux/delay.h>
  25#include <linux/dmi.h>
  26#include <linux/input/mt.h>
  27#include <linux/serio.h>
  28#include <linux/libps2.h>
  29#include <linux/rmi.h>
  30#include <linux/i2c.h>
  31#include <linux/slab.h>
  32#include "psmouse.h"
  33#include "synaptics.h"
  34
  35/*
  36 * The x/y limits are taken from the Synaptics TouchPad interfacing Guide,
  37 * section 2.3.2, which says that they should be valid regardless of the
  38 * actual size of the sensor.
  39 * Note that newer firmware allows querying device for maximum useable
  40 * coordinates.
  41 */
  42#define XMIN 0
  43#define XMAX 6143
  44#define YMIN 0
  45#define YMAX 6143
  46#define XMIN_NOMINAL 1472
  47#define XMAX_NOMINAL 5472
  48#define YMIN_NOMINAL 1408
  49#define YMAX_NOMINAL 4448
  50
  51/* Size in bits of absolute position values reported by the hardware */
  52#define ABS_POS_BITS 13
  53
  54/*
  55 * These values should represent the absolute maximum value that will
  56 * be reported for a positive position value. Some Synaptics firmware
  57 * uses this value to indicate a finger near the edge of the touchpad
  58 * whose precise position cannot be determined.
  59 *
  60 * At least one touchpad is known to report positions in excess of this
  61 * value which are actually negative values truncated to the 13-bit
  62 * reporting range. These values have never been observed to be lower
  63 * than 8184 (i.e. -8), so we treat all values greater than 8176 as
  64 * negative and any other value as positive.
  65 */
  66#define X_MAX_POSITIVE 8176
  67#define Y_MAX_POSITIVE 8176
  68
  69/* maximum ABS_MT_POSITION displacement (in mm) */
  70#define DMAX 10
  71
  72/*****************************************************************************
  73 *	Stuff we need even when we do not want native Synaptics support
  74 ****************************************************************************/
  75
  76/*
  77 * Set the synaptics touchpad mode byte by special commands
  78 */
  79static int synaptics_mode_cmd(struct psmouse *psmouse, u8 mode)
  80{
  81	u8 param[1];
  82	int error;
  83
  84	error = ps2_sliced_command(&psmouse->ps2dev, mode);
  85	if (error)
  86		return error;
  87
  88	param[0] = SYN_PS_SET_MODE2;
  89	error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_SETRATE);
  90	if (error)
  91		return error;
  92
  93	return 0;
  94}
  95
  96int synaptics_detect(struct psmouse *psmouse, bool set_properties)
  97{
  98	struct ps2dev *ps2dev = &psmouse->ps2dev;
  99	u8 param[4] = { 0 };
 100
 101	ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 102	ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 103	ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 104	ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 105	ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
 106
 107	if (param[1] != 0x47)
 108		return -ENODEV;
 109
 110	if (set_properties) {
 111		psmouse->vendor = "Synaptics";
 112		psmouse->name = "TouchPad";
 113	}
 114
 115	return 0;
 116}
 117
 118void synaptics_reset(struct psmouse *psmouse)
 119{
 120	/* reset touchpad back to relative mode, gestures enabled */
 121	synaptics_mode_cmd(psmouse, 0);
 122}
 123
 124#if defined(CONFIG_MOUSE_PS2_SYNAPTICS) || \
 125    defined(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)
 126
 127/* This list has been kindly provided by Synaptics. */
 128static const char * const topbuttonpad_pnp_ids[] = {
 129	"LEN0017",
 130	"LEN0018",
 131	"LEN0019",
 132	"LEN0023",
 133	"LEN002A",
 134	"LEN002B",
 135	"LEN002C",
 136	"LEN002D",
 137	"LEN002E",
 138	"LEN0033", /* Helix */
 139	"LEN0034", /* T431s, L440, L540, T540, W540, X1 Carbon 2nd */
 140	"LEN0035", /* X240 */
 141	"LEN0036", /* T440 */
 142	"LEN0037", /* X1 Carbon 2nd */
 143	"LEN0038",
 144	"LEN0039", /* T440s */
 145	"LEN0041",
 146	"LEN0042", /* Yoga */
 147	"LEN0045",
 148	"LEN0047",
 149	"LEN2000", /* S540 */
 150	"LEN2001", /* Edge E431 */
 151	"LEN2002", /* Edge E531 */
 152	"LEN2003",
 153	"LEN2004", /* L440 */
 154	"LEN2005",
 155	"LEN2006", /* Edge E440/E540 */
 156	"LEN2007",
 157	"LEN2008",
 158	"LEN2009",
 159	"LEN200A",
 160	"LEN200B",
 161	NULL
 162};
 163
 164static const char * const smbus_pnp_ids[] = {
 165	/* all of the topbuttonpad_pnp_ids are valid, we just add some extras */
 166	"LEN0048", /* X1 Carbon 3 */
 167	"LEN0046", /* X250 */
 168	"LEN0049", /* Yoga 11e */
 169	"LEN004a", /* W541 */
 170	"LEN005b", /* P50 */
 171	"LEN005e", /* T560 */
 172	"LEN006c", /* T470s */
 173	"LEN007a", /* T470s */
 174	"LEN0071", /* T480 */
 175	"LEN0072", /* X1 Carbon Gen 5 (2017) - Elan/ALPS trackpoint */
 176	"LEN0073", /* X1 Carbon G5 (Elantech) */
 177	"LEN0091", /* X1 Carbon 6 */
 178	"LEN0092", /* X1 Carbon 6 */
 179	"LEN0093", /* T480 */
 180	"LEN0096", /* X280 */
 181	"LEN0097", /* X280 -> ALPS trackpoint */
 182	"LEN0099", /* X1 Extreme Gen 1 / P1 Gen 1 */
 183	"LEN009b", /* T580 */
 184	"LEN0402", /* X1 Extreme Gen 2 / P1 Gen 2 */
 185	"LEN040f", /* P1 Gen 3 */
 186	"LEN0411", /* L14 Gen 1 */
 187	"LEN200f", /* T450s */
 188	"LEN2044", /* L470  */
 189	"LEN2054", /* E480 */
 190	"LEN2055", /* E580 */
 191	"LEN2068", /* T14 Gen 1 */
 
 192	"SYN3052", /* HP EliteBook 840 G4 */
 193	"SYN3221", /* HP 15-ay000 */
 194	"SYN323d", /* HP Spectre X360 13-w013dx */
 195	"SYN3257", /* HP Envy 13-ad105ng */
 196	NULL
 197};
 198
 199static const char * const forcepad_pnp_ids[] = {
 200	"SYN300D",
 201	"SYN3014",
 202	NULL
 203};
 204
 205/*
 206 * Send a command to the synaptics touchpad by special commands
 207 */
 208static int synaptics_send_cmd(struct psmouse *psmouse, u8 cmd, u8 *param)
 209{
 210	int error;
 211
 212	error = ps2_sliced_command(&psmouse->ps2dev, cmd);
 213	if (error)
 214		return error;
 215
 216	error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO);
 217	if (error)
 218		return error;
 219
 220	return 0;
 221}
 222
 223static int synaptics_query_int(struct psmouse *psmouse, u8 query_cmd, u32 *val)
 224{
 225	int error;
 226	union {
 227		__be32 be_val;
 228		char buf[4];
 229	} resp = { 0 };
 230
 231	error = synaptics_send_cmd(psmouse, query_cmd, resp.buf + 1);
 232	if (error)
 233		return error;
 234
 235	*val = be32_to_cpu(resp.be_val);
 236	return 0;
 237}
 238
 239/*
 240 * Identify Touchpad
 241 * See also the SYN_ID_* macros
 242 */
 243static int synaptics_identify(struct psmouse *psmouse,
 244			      struct synaptics_device_info *info)
 245{
 246	int error;
 247
 248	error = synaptics_query_int(psmouse, SYN_QUE_IDENTIFY, &info->identity);
 249	if (error)
 250		return error;
 251
 252	return SYN_ID_IS_SYNAPTICS(info->identity) ? 0 : -ENXIO;
 253}
 254
 255/*
 256 * Read the model-id bytes from the touchpad
 257 * see also SYN_MODEL_* macros
 258 */
 259static int synaptics_model_id(struct psmouse *psmouse,
 260			      struct synaptics_device_info *info)
 261{
 262	return synaptics_query_int(psmouse, SYN_QUE_MODEL, &info->model_id);
 263}
 264
 265/*
 266 * Read the firmware id from the touchpad
 267 */
 268static int synaptics_firmware_id(struct psmouse *psmouse,
 269				 struct synaptics_device_info *info)
 270{
 271	return synaptics_query_int(psmouse, SYN_QUE_FIRMWARE_ID,
 272				   &info->firmware_id);
 273}
 274
 275/*
 276 * Read the board id and the "More Extended Queries" from the touchpad
 277 * The board id is encoded in the "QUERY MODES" response
 278 */
 279static int synaptics_query_modes(struct psmouse *psmouse,
 280				 struct synaptics_device_info *info)
 281{
 282	u8 bid[3];
 283	int error;
 284
 285	/* firmwares prior 7.5 have no board_id encoded */
 286	if (SYN_ID_FULL(info->identity) < 0x705)
 287		return 0;
 288
 289	error = synaptics_send_cmd(psmouse, SYN_QUE_MODES, bid);
 290	if (error)
 291		return error;
 292
 293	info->board_id = ((bid[0] & 0xfc) << 6) | bid[1];
 294
 295	if (SYN_MEXT_CAP_BIT(bid[0]))
 296		return synaptics_query_int(psmouse, SYN_QUE_MEXT_CAPAB_10,
 297					   &info->ext_cap_10);
 298
 299	return 0;
 300}
 301
 302/*
 303 * Read the capability-bits from the touchpad
 304 * see also the SYN_CAP_* macros
 305 */
 306static int synaptics_capability(struct psmouse *psmouse,
 307				struct synaptics_device_info *info)
 308{
 309	int error;
 310
 311	error = synaptics_query_int(psmouse, SYN_QUE_CAPABILITIES,
 312				    &info->capabilities);
 313	if (error)
 314		return error;
 315
 316	info->ext_cap = info->ext_cap_0c = 0;
 317
 318	/*
 319	 * Older firmwares had submodel ID fixed to 0x47
 320	 */
 321	if (SYN_ID_FULL(info->identity) < 0x705 &&
 322	    SYN_CAP_SUBMODEL_ID(info->capabilities) != 0x47) {
 323		return -ENXIO;
 324	}
 325
 326	/*
 327	 * Unless capExtended is set the rest of the flags should be ignored
 328	 */
 329	if (!SYN_CAP_EXTENDED(info->capabilities))
 330		info->capabilities = 0;
 331
 332	if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 1) {
 333		error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB,
 334					    &info->ext_cap);
 335		if (error) {
 336			psmouse_warn(psmouse,
 337				     "device claims to have extended capabilities, but I'm not able to read them.\n");
 338		} else {
 339			/*
 340			 * if nExtBtn is greater than 8 it should be considered
 341			 * invalid and treated as 0
 342			 */
 343			if (SYN_CAP_MULTI_BUTTON_NO(info->ext_cap) > 8)
 344				info->ext_cap &= ~SYN_CAP_MB_MASK;
 345		}
 346	}
 347
 348	if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 4) {
 349		error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB_0C,
 350					    &info->ext_cap_0c);
 351		if (error)
 352			psmouse_warn(psmouse,
 353				     "device claims to have extended capability 0x0c, but I'm not able to read it.\n");
 354	}
 355
 356	return 0;
 357}
 358
 359/*
 360 * Read touchpad resolution and maximum reported coordinates
 361 * Resolution is left zero if touchpad does not support the query
 362 */
 363static int synaptics_resolution(struct psmouse *psmouse,
 364				struct synaptics_device_info *info)
 365{
 366	u8 resp[3];
 367	int error;
 368
 369	if (SYN_ID_MAJOR(info->identity) < 4)
 370		return 0;
 371
 372	error = synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, resp);
 373	if (!error) {
 374		if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) {
 375			info->x_res = resp[0]; /* x resolution in units/mm */
 376			info->y_res = resp[2]; /* y resolution in units/mm */
 377		}
 378	}
 379
 380	if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 5 &&
 381	    SYN_CAP_MAX_DIMENSIONS(info->ext_cap_0c)) {
 382		error = synaptics_send_cmd(psmouse,
 383					   SYN_QUE_EXT_MAX_COORDS, resp);
 384		if (error) {
 385			psmouse_warn(psmouse,
 386				     "device claims to have max coordinates query, but I'm not able to read it.\n");
 387		} else {
 388			info->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
 389			info->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
 390			psmouse_info(psmouse,
 391				     "queried max coordinates: x [..%d], y [..%d]\n",
 392				     info->x_max, info->y_max);
 393		}
 394	}
 395
 396	if (SYN_CAP_MIN_DIMENSIONS(info->ext_cap_0c) &&
 397	    (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 7 ||
 398	     /*
 399	      * Firmware v8.1 does not report proper number of extended
 400	      * capabilities, but has been proven to report correct min
 401	      * coordinates.
 402	      */
 403	     SYN_ID_FULL(info->identity) == 0x801)) {
 404		error = synaptics_send_cmd(psmouse,
 405					   SYN_QUE_EXT_MIN_COORDS, resp);
 406		if (error) {
 407			psmouse_warn(psmouse,
 408				     "device claims to have min coordinates query, but I'm not able to read it.\n");
 409		} else {
 410			info->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
 411			info->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
 412			psmouse_info(psmouse,
 413				     "queried min coordinates: x [%d..], y [%d..]\n",
 414				     info->x_min, info->y_min);
 415		}
 416	}
 417
 418	return 0;
 419}
 420
 421static int synaptics_query_hardware(struct psmouse *psmouse,
 422				    struct synaptics_device_info *info)
 423{
 424	int error;
 425
 426	memset(info, 0, sizeof(*info));
 427
 428	error = synaptics_identify(psmouse, info);
 429	if (error)
 430		return error;
 431
 432	error = synaptics_model_id(psmouse, info);
 433	if (error)
 434		return error;
 435
 436	error = synaptics_firmware_id(psmouse, info);
 437	if (error)
 438		return error;
 439
 440	error = synaptics_query_modes(psmouse, info);
 441	if (error)
 442		return error;
 443
 444	error = synaptics_capability(psmouse, info);
 445	if (error)
 446		return error;
 447
 448	error = synaptics_resolution(psmouse, info);
 449	if (error)
 450		return error;
 451
 452	return 0;
 453}
 454
 455#endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
 456
 457#ifdef CONFIG_MOUSE_PS2_SYNAPTICS
 458
 459static bool cr48_profile_sensor;
 460
 461#define ANY_BOARD_ID 0
 462struct min_max_quirk {
 463	const char * const *pnp_ids;
 464	struct {
 465		u32 min, max;
 466	} board_id;
 467	u32 x_min, x_max, y_min, y_max;
 468};
 469
 470static const struct min_max_quirk min_max_pnpid_table[] = {
 471	{
 472		(const char * const []){"LEN0033", NULL},
 473		{ANY_BOARD_ID, ANY_BOARD_ID},
 474		1024, 5052, 2258, 4832
 475	},
 476	{
 477		(const char * const []){"LEN0042", NULL},
 478		{ANY_BOARD_ID, ANY_BOARD_ID},
 479		1232, 5710, 1156, 4696
 480	},
 481	{
 482		(const char * const []){"LEN0034", "LEN0036", "LEN0037",
 483					"LEN0039", "LEN2002", "LEN2004",
 484					NULL},
 485		{ANY_BOARD_ID, 2961},
 486		1024, 5112, 2024, 4832
 487	},
 488	{
 489		(const char * const []){"LEN2000", NULL},
 490		{ANY_BOARD_ID, ANY_BOARD_ID},
 491		1024, 5113, 2021, 4832
 492	},
 493	{
 494		(const char * const []){"LEN2001", NULL},
 495		{ANY_BOARD_ID, ANY_BOARD_ID},
 496		1024, 5022, 2508, 4832
 497	},
 498	{
 499		(const char * const []){"LEN2006", NULL},
 500		{2691, 2691},
 501		1024, 5045, 2457, 4832
 502	},
 503	{
 504		(const char * const []){"LEN2006", NULL},
 505		{ANY_BOARD_ID, ANY_BOARD_ID},
 506		1264, 5675, 1171, 4688
 507	},
 508	{ }
 509};
 510
 511/*****************************************************************************
 512 *	Synaptics communications functions
 513 ****************************************************************************/
 514
 515/*
 516 * Synaptics touchpads report the y coordinate from bottom to top, which is
 517 * opposite from what userspace expects.
 518 * This function is used to invert y before reporting.
 519 */
 520static int synaptics_invert_y(int y)
 521{
 522	return YMAX_NOMINAL + YMIN_NOMINAL - y;
 523}
 524
 525/*
 526 * Apply quirk(s) if the hardware matches
 527 */
 528static void synaptics_apply_quirks(struct psmouse *psmouse,
 529				   struct synaptics_device_info *info)
 530{
 531	int i;
 532
 533	for (i = 0; min_max_pnpid_table[i].pnp_ids; i++) {
 534		if (!psmouse_matches_pnp_id(psmouse,
 535					    min_max_pnpid_table[i].pnp_ids))
 536			continue;
 537
 538		if (min_max_pnpid_table[i].board_id.min != ANY_BOARD_ID &&
 539		    info->board_id < min_max_pnpid_table[i].board_id.min)
 540			continue;
 541
 542		if (min_max_pnpid_table[i].board_id.max != ANY_BOARD_ID &&
 543		    info->board_id > min_max_pnpid_table[i].board_id.max)
 544			continue;
 545
 546		info->x_min = min_max_pnpid_table[i].x_min;
 547		info->x_max = min_max_pnpid_table[i].x_max;
 548		info->y_min = min_max_pnpid_table[i].y_min;
 549		info->y_max = min_max_pnpid_table[i].y_max;
 550		psmouse_info(psmouse,
 551			     "quirked min/max coordinates: x [%d..%d], y [%d..%d]\n",
 552			     info->x_min, info->x_max,
 553			     info->y_min, info->y_max);
 554		break;
 555	}
 556}
 557
 558static bool synaptics_has_agm(struct synaptics_data *priv)
 559{
 560	return (SYN_CAP_ADV_GESTURE(priv->info.ext_cap_0c) ||
 561		SYN_CAP_IMAGE_SENSOR(priv->info.ext_cap_0c));
 562}
 563
 564static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse)
 565{
 566	static u8 param = 0xc8;
 567	int error;
 568
 569	error = ps2_sliced_command(&psmouse->ps2dev, SYN_QUE_MODEL);
 570	if (error)
 571		return error;
 572
 573	error = ps2_command(&psmouse->ps2dev, &param, PSMOUSE_CMD_SETRATE);
 574	if (error)
 575		return error;
 576
 577	return 0;
 578}
 579
 580static int synaptics_set_mode(struct psmouse *psmouse)
 581{
 582	struct synaptics_data *priv = psmouse->private;
 583	int error;
 584
 585	priv->mode = 0;
 586	if (priv->absolute_mode)
 587		priv->mode |= SYN_BIT_ABSOLUTE_MODE;
 588	if (priv->disable_gesture)
 589		priv->mode |= SYN_BIT_DISABLE_GESTURE;
 590	if (psmouse->rate >= 80)
 591		priv->mode |= SYN_BIT_HIGH_RATE;
 592	if (SYN_CAP_EXTENDED(priv->info.capabilities))
 593		priv->mode |= SYN_BIT_W_MODE;
 594
 595	error = synaptics_mode_cmd(psmouse, priv->mode);
 596	if (error)
 597		return error;
 598
 599	if (priv->absolute_mode && synaptics_has_agm(priv)) {
 600		error = synaptics_set_advanced_gesture_mode(psmouse);
 601		if (error) {
 602			psmouse_err(psmouse,
 603				    "Advanced gesture mode init failed: %d\n",
 604				    error);
 605			return error;
 606		}
 607	}
 608
 609	return 0;
 610}
 611
 612static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate)
 613{
 614	struct synaptics_data *priv = psmouse->private;
 615
 616	if (rate >= 80) {
 617		priv->mode |= SYN_BIT_HIGH_RATE;
 618		psmouse->rate = 80;
 619	} else {
 620		priv->mode &= ~SYN_BIT_HIGH_RATE;
 621		psmouse->rate = 40;
 622	}
 623
 624	synaptics_mode_cmd(psmouse, priv->mode);
 625}
 626
 627/*****************************************************************************
 628 *	Synaptics pass-through PS/2 port support
 629 ****************************************************************************/
 630static int synaptics_pt_write(struct serio *serio, u8 c)
 631{
 632	struct psmouse *parent = psmouse_from_serio(serio->parent);
 633	u8 rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */
 634	int error;
 635
 636	error = ps2_sliced_command(&parent->ps2dev, c);
 637	if (error)
 638		return error;
 639
 640	error = ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE);
 641	if (error)
 642		return error;
 643
 644	return 0;
 645}
 646
 647static int synaptics_pt_start(struct serio *serio)
 648{
 649	struct psmouse *parent = psmouse_from_serio(serio->parent);
 650	struct synaptics_data *priv = parent->private;
 651
 652	serio_pause_rx(parent->ps2dev.serio);
 653	priv->pt_port = serio;
 654	serio_continue_rx(parent->ps2dev.serio);
 655
 656	return 0;
 657}
 658
 659static void synaptics_pt_stop(struct serio *serio)
 660{
 661	struct psmouse *parent = psmouse_from_serio(serio->parent);
 662	struct synaptics_data *priv = parent->private;
 663
 664	serio_pause_rx(parent->ps2dev.serio);
 665	priv->pt_port = NULL;
 666	serio_continue_rx(parent->ps2dev.serio);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 667}
 668
 669static int synaptics_is_pt_packet(u8 *buf)
 670{
 671	return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
 672}
 673
 674static void synaptics_pass_pt_packet(struct serio *ptport, u8 *packet)
 675{
 676	struct psmouse *child = psmouse_from_serio(ptport);
 677
 678	if (child && child->state == PSMOUSE_ACTIVATED) {
 679		serio_interrupt(ptport, packet[1], 0);
 680		serio_interrupt(ptport, packet[4], 0);
 681		serio_interrupt(ptport, packet[5], 0);
 682		if (child->pktsize == 4)
 683			serio_interrupt(ptport, packet[2], 0);
 684	} else {
 685		serio_interrupt(ptport, packet[1], 0);
 
 
 
 
 
 
 
 686	}
 687}
 688
 689static void synaptics_pt_activate(struct psmouse *psmouse)
 690{
 691	struct synaptics_data *priv = psmouse->private;
 692	struct psmouse *child = psmouse_from_serio(priv->pt_port);
 693
 694	/* adjust the touchpad to child's choice of protocol */
 695	if (child) {
 696		if (child->pktsize == 4)
 697			priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT;
 698		else
 699			priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT;
 700
 701		if (synaptics_mode_cmd(psmouse, priv->mode))
 702			psmouse_warn(psmouse,
 703				     "failed to switch guest protocol\n");
 704	}
 705}
 706
 707static void synaptics_pt_create(struct psmouse *psmouse)
 708{
 709	struct serio *serio;
 710
 711	serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
 712	if (!serio) {
 713		psmouse_err(psmouse,
 714			    "not enough memory for pass-through port\n");
 715		return;
 716	}
 717
 718	serio->id.type = SERIO_PS_PSTHRU;
 719	strscpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
 720	strscpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->phys));
 721	serio->write = synaptics_pt_write;
 722	serio->start = synaptics_pt_start;
 723	serio->stop = synaptics_pt_stop;
 
 
 724	serio->parent = psmouse->ps2dev.serio;
 725
 726	psmouse->pt_activate = synaptics_pt_activate;
 727
 728	psmouse_info(psmouse, "serio: %s port at %s\n",
 729		     serio->name, psmouse->phys);
 730	serio_register_port(serio);
 731}
 732
 733/*****************************************************************************
 734 *	Functions to interpret the absolute mode packets
 735 ****************************************************************************/
 736
 737static void synaptics_parse_agm(const u8 buf[],
 738				struct synaptics_data *priv,
 739				struct synaptics_hw_state *hw)
 740{
 741	struct synaptics_hw_state *agm = &priv->agm;
 742	int agm_packet_type;
 743
 744	agm_packet_type = (buf[5] & 0x30) >> 4;
 745	switch (agm_packet_type) {
 746	case 1:
 747		/* Gesture packet: (x, y, z) half resolution */
 748		agm->w = hw->w;
 749		agm->x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1;
 750		agm->y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1;
 751		agm->z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1;
 752		break;
 753
 754	case 2:
 755		/* AGM-CONTACT packet: we are only interested in the count */
 756		priv->agm_count = buf[1];
 757		break;
 758
 759	default:
 760		break;
 761	}
 762}
 763
 764static void synaptics_parse_ext_buttons(const u8 buf[],
 765					struct synaptics_data *priv,
 766					struct synaptics_hw_state *hw)
 767{
 768	unsigned int ext_bits =
 769		(SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1;
 770	unsigned int ext_mask = GENMASK(ext_bits - 1, 0);
 771
 772	hw->ext_buttons = buf[4] & ext_mask;
 773	hw->ext_buttons |= (buf[5] & ext_mask) << ext_bits;
 774}
 775
 776static int synaptics_parse_hw_state(const u8 buf[],
 777				    struct synaptics_data *priv,
 778				    struct synaptics_hw_state *hw)
 779{
 780	memset(hw, 0, sizeof(struct synaptics_hw_state));
 781
 782	if (SYN_MODEL_NEWABS(priv->info.model_id)) {
 783		hw->w = (((buf[0] & 0x30) >> 2) |
 784			 ((buf[0] & 0x04) >> 1) |
 785			 ((buf[3] & 0x04) >> 2));
 786
 787		if (synaptics_has_agm(priv) && hw->w == 2) {
 788			synaptics_parse_agm(buf, priv, hw);
 789			return 1;
 790		}
 791
 792		hw->x = (((buf[3] & 0x10) << 8) |
 793			 ((buf[1] & 0x0f) << 8) |
 794			 buf[4]);
 795		hw->y = (((buf[3] & 0x20) << 7) |
 796			 ((buf[1] & 0xf0) << 4) |
 797			 buf[5]);
 798		hw->z = buf[2];
 799
 800		hw->left  = (buf[0] & 0x01) ? 1 : 0;
 801		hw->right = (buf[0] & 0x02) ? 1 : 0;
 802
 803		if (priv->is_forcepad) {
 804			/*
 805			 * ForcePads, like Clickpads, use middle button
 806			 * bits to report primary button clicks.
 807			 * Unfortunately they report primary button not
 808			 * only when user presses on the pad above certain
 809			 * threshold, but also when there are more than one
 810			 * finger on the touchpad, which interferes with
 811			 * out multi-finger gestures.
 812			 */
 813			if (hw->z == 0) {
 814				/* No contacts */
 815				priv->press = priv->report_press = false;
 816			} else if (hw->w >= 4 && ((buf[0] ^ buf[3]) & 0x01)) {
 817				/*
 818				 * Single-finger touch with pressure above
 819				 * the threshold. If pressure stays long
 820				 * enough, we'll start reporting primary
 821				 * button. We rely on the device continuing
 822				 * sending data even if finger does not
 823				 * move.
 824				 */
 825				if  (!priv->press) {
 826					priv->press_start = jiffies;
 827					priv->press = true;
 828				} else if (time_after(jiffies,
 829						priv->press_start +
 830							msecs_to_jiffies(50))) {
 831					priv->report_press = true;
 832				}
 833			} else {
 834				priv->press = false;
 835			}
 836
 837			hw->left = priv->report_press;
 838
 839		} else if (SYN_CAP_CLICKPAD(priv->info.ext_cap_0c)) {
 840			/*
 841			 * Clickpad's button is transmitted as middle button,
 842			 * however, since it is primary button, we will report
 843			 * it as BTN_LEFT.
 844			 */
 845			hw->left = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 846
 847		} else if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities)) {
 848			hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 849			if (hw->w == 2)
 850				hw->scroll = (s8)buf[1];
 851		}
 852
 853		if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) {
 854			hw->up   = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 855			hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;
 856		}
 857
 858		if (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) > 0 &&
 859		    ((buf[0] ^ buf[3]) & 0x02)) {
 860			synaptics_parse_ext_buttons(buf, priv, hw);
 861		}
 862	} else {
 863		hw->x = (((buf[1] & 0x1f) << 8) | buf[2]);
 864		hw->y = (((buf[4] & 0x1f) << 8) | buf[5]);
 865
 866		hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F));
 867		hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1));
 868
 869		hw->left  = (buf[0] & 0x01) ? 1 : 0;
 870		hw->right = (buf[0] & 0x02) ? 1 : 0;
 871	}
 872
 873	/*
 874	 * Convert wrap-around values to negative. (X|Y)_MAX_POSITIVE
 875	 * is used by some firmware to indicate a finger at the edge of
 876	 * the touchpad whose precise position cannot be determined, so
 877	 * convert these values to the maximum axis value.
 878	 */
 879	if (hw->x > X_MAX_POSITIVE)
 880		hw->x -= 1 << ABS_POS_BITS;
 881	else if (hw->x == X_MAX_POSITIVE)
 882		hw->x = XMAX;
 883
 884	if (hw->y > Y_MAX_POSITIVE)
 885		hw->y -= 1 << ABS_POS_BITS;
 886	else if (hw->y == Y_MAX_POSITIVE)
 887		hw->y = YMAX;
 888
 889	return 0;
 890}
 891
 892static void synaptics_report_semi_mt_slot(struct input_dev *dev, int slot,
 893					  bool active, int x, int y)
 894{
 895	input_mt_slot(dev, slot);
 896	input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
 897	if (active) {
 898		input_report_abs(dev, ABS_MT_POSITION_X, x);
 899		input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(y));
 900	}
 901}
 902
 903static void synaptics_report_semi_mt_data(struct input_dev *dev,
 904					  const struct synaptics_hw_state *a,
 905					  const struct synaptics_hw_state *b,
 906					  int num_fingers)
 907{
 908	if (num_fingers >= 2) {
 909		synaptics_report_semi_mt_slot(dev, 0, true, min(a->x, b->x),
 910					      min(a->y, b->y));
 911		synaptics_report_semi_mt_slot(dev, 1, true, max(a->x, b->x),
 912					      max(a->y, b->y));
 913	} else if (num_fingers == 1) {
 914		synaptics_report_semi_mt_slot(dev, 0, true, a->x, a->y);
 915		synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
 916	} else {
 917		synaptics_report_semi_mt_slot(dev, 0, false, 0, 0);
 918		synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
 919	}
 920}
 921
 922static void synaptics_report_ext_buttons(struct psmouse *psmouse,
 923					 const struct synaptics_hw_state *hw)
 924{
 925	struct input_dev *dev = psmouse->dev;
 926	struct synaptics_data *priv = psmouse->private;
 927	int ext_bits = (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1;
 928	int i;
 929
 930	if (!SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap))
 931		return;
 932
 933	/* Bug in FW 8.1 & 8.2, buttons are reported only when ExtBit is 1 */
 934	if ((SYN_ID_FULL(priv->info.identity) == 0x801 ||
 935	     SYN_ID_FULL(priv->info.identity) == 0x802) &&
 936	    !((psmouse->packet[0] ^ psmouse->packet[3]) & 0x02))
 937		return;
 938
 939	if (!SYN_CAP_EXT_BUTTONS_STICK(priv->info.ext_cap_10)) {
 940		for (i = 0; i < ext_bits; i++) {
 941			input_report_key(dev, BTN_0 + 2 * i,
 942				hw->ext_buttons & BIT(i));
 943			input_report_key(dev, BTN_1 + 2 * i,
 944				hw->ext_buttons & BIT(i + ext_bits));
 945		}
 946		return;
 947	}
 948
 949	/*
 950	 * This generation of touchpads has the trackstick buttons
 951	 * physically wired to the touchpad. Re-route them through
 952	 * the pass-through interface.
 953	 */
 954	if (priv->pt_port) {
 955		u8 pt_buttons;
 956
 957		/* The trackstick expects at most 3 buttons */
 958		pt_buttons = SYN_EXT_BUTTON_STICK_L(hw->ext_buttons)      |
 959			     SYN_EXT_BUTTON_STICK_R(hw->ext_buttons) << 1 |
 960			     SYN_EXT_BUTTON_STICK_M(hw->ext_buttons) << 2;
 961
 962		serio_interrupt(priv->pt_port,
 963				PSMOUSE_OOB_EXTRA_BTNS, SERIO_OOB_DATA);
 964		serio_interrupt(priv->pt_port, pt_buttons, SERIO_OOB_DATA);
 965	}
 966}
 967
 968static void synaptics_report_buttons(struct psmouse *psmouse,
 969				     const struct synaptics_hw_state *hw)
 970{
 971	struct input_dev *dev = psmouse->dev;
 972	struct synaptics_data *priv = psmouse->private;
 973
 974	input_report_key(dev, BTN_LEFT, hw->left);
 975	input_report_key(dev, BTN_RIGHT, hw->right);
 976
 977	if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities))
 978		input_report_key(dev, BTN_MIDDLE, hw->middle);
 979
 980	if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) {
 981		input_report_key(dev, BTN_FORWARD, hw->up);
 982		input_report_key(dev, BTN_BACK, hw->down);
 983	}
 984
 985	synaptics_report_ext_buttons(psmouse, hw);
 986}
 987
 988static void synaptics_report_mt_data(struct psmouse *psmouse,
 989				     const struct synaptics_hw_state *sgm,
 990				     int num_fingers)
 991{
 992	struct input_dev *dev = psmouse->dev;
 993	struct synaptics_data *priv = psmouse->private;
 994	const struct synaptics_hw_state *hw[2] = { sgm, &priv->agm };
 995	struct input_mt_pos pos[2];
 996	int slot[2], nsemi, i;
 997
 998	nsemi = clamp_val(num_fingers, 0, 2);
 999
1000	for (i = 0; i < nsemi; i++) {
1001		pos[i].x = hw[i]->x;
1002		pos[i].y = synaptics_invert_y(hw[i]->y);
1003	}
1004
1005	input_mt_assign_slots(dev, slot, pos, nsemi, DMAX * priv->info.x_res);
1006
1007	for (i = 0; i < nsemi; i++) {
1008		input_mt_slot(dev, slot[i]);
1009		input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
1010		input_report_abs(dev, ABS_MT_POSITION_X, pos[i].x);
1011		input_report_abs(dev, ABS_MT_POSITION_Y, pos[i].y);
1012		input_report_abs(dev, ABS_MT_PRESSURE, hw[i]->z);
1013	}
1014
1015	input_mt_drop_unused(dev);
1016
1017	/* Don't use active slot count to generate BTN_TOOL events. */
1018	input_mt_report_pointer_emulation(dev, false);
1019
1020	/* Send the number of fingers reported by touchpad itself. */
1021	input_mt_report_finger_count(dev, num_fingers);
1022
1023	synaptics_report_buttons(psmouse, sgm);
1024
1025	input_sync(dev);
1026}
1027
1028static void synaptics_image_sensor_process(struct psmouse *psmouse,
1029					   struct synaptics_hw_state *sgm)
1030{
1031	struct synaptics_data *priv = psmouse->private;
1032	int num_fingers;
1033
1034	/*
1035	 * Update mt_state using the new finger count and current mt_state.
1036	 */
1037	if (sgm->z == 0)
1038		num_fingers = 0;
1039	else if (sgm->w >= 4)
1040		num_fingers = 1;
1041	else if (sgm->w == 0)
1042		num_fingers = 2;
1043	else if (sgm->w == 1)
1044		num_fingers = priv->agm_count ? priv->agm_count : 3;
1045	else
1046		num_fingers = 4;
1047
1048	/* Send resulting input events to user space */
1049	synaptics_report_mt_data(psmouse, sgm, num_fingers);
1050}
1051
1052static bool synaptics_has_multifinger(struct synaptics_data *priv)
1053{
1054	if (SYN_CAP_MULTIFINGER(priv->info.capabilities))
1055		return true;
1056
1057	/* Advanced gesture mode also sends multi finger data */
1058	return synaptics_has_agm(priv);
1059}
1060
1061/*
1062 *  called for each full received packet from the touchpad
1063 */
1064static void synaptics_process_packet(struct psmouse *psmouse)
1065{
1066	struct input_dev *dev = psmouse->dev;
1067	struct synaptics_data *priv = psmouse->private;
1068	struct synaptics_device_info *info = &priv->info;
1069	struct synaptics_hw_state hw;
1070	int num_fingers;
1071	int finger_width;
1072
1073	if (synaptics_parse_hw_state(psmouse->packet, priv, &hw))
1074		return;
1075
1076	if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) {
1077		synaptics_image_sensor_process(psmouse, &hw);
1078		return;
1079	}
1080
1081	if (hw.scroll) {
1082		priv->scroll += hw.scroll;
1083
1084		while (priv->scroll >= 4) {
1085			input_report_key(dev, BTN_BACK, !hw.down);
1086			input_sync(dev);
1087			input_report_key(dev, BTN_BACK, hw.down);
1088			input_sync(dev);
1089			priv->scroll -= 4;
1090		}
1091		while (priv->scroll <= -4) {
1092			input_report_key(dev, BTN_FORWARD, !hw.up);
1093			input_sync(dev);
1094			input_report_key(dev, BTN_FORWARD, hw.up);
1095			input_sync(dev);
1096			priv->scroll += 4;
1097		}
1098		return;
1099	}
1100
1101	if (hw.z > 0 && hw.x > 1) {
1102		num_fingers = 1;
1103		finger_width = 5;
1104		if (SYN_CAP_EXTENDED(info->capabilities)) {
1105			switch (hw.w) {
1106			case 0 ... 1:
1107				if (synaptics_has_multifinger(priv))
1108					num_fingers = hw.w + 2;
1109				break;
1110			case 2:
1111				/*
1112				 * SYN_MODEL_PEN(info->model_id): even if
1113				 * the device supports pen, we treat it as
1114				 * a single finger.
1115				 */
1116				break;
1117			case 4 ... 15:
1118				if (SYN_CAP_PALMDETECT(info->capabilities))
1119					finger_width = hw.w;
1120				break;
1121			}
1122		}
1123	} else {
1124		num_fingers = 0;
1125		finger_width = 0;
1126	}
1127
1128	if (cr48_profile_sensor) {
1129		synaptics_report_mt_data(psmouse, &hw, num_fingers);
1130		return;
1131	}
1132
1133	if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c))
1134		synaptics_report_semi_mt_data(dev, &hw, &priv->agm,
1135					      num_fingers);
1136
1137	/* Post events
1138	 * BTN_TOUCH has to be first as mousedev relies on it when doing
1139	 * absolute -> relative conversion
1140	 */
1141	if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
1142	if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
1143
1144	if (num_fingers > 0) {
1145		input_report_abs(dev, ABS_X, hw.x);
1146		input_report_abs(dev, ABS_Y, synaptics_invert_y(hw.y));
1147	}
1148	input_report_abs(dev, ABS_PRESSURE, hw.z);
1149
1150	if (SYN_CAP_PALMDETECT(info->capabilities))
1151		input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
1152
1153	input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
1154	if (synaptics_has_multifinger(priv)) {
1155		input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
1156		input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
1157	}
1158
1159	synaptics_report_buttons(psmouse, &hw);
1160
1161	input_sync(dev);
1162}
1163
1164static bool synaptics_validate_byte(struct psmouse *psmouse,
1165				    int idx, enum synaptics_pkt_type pkt_type)
1166{
1167	static const u8 newabs_mask[]	  = { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
1168	static const u8 newabs_rel_mask[] = { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
1169	static const u8 newabs_rslt[]	  = { 0x80, 0x00, 0x00, 0xC0, 0x00 };
1170	static const u8 oldabs_mask[]	  = { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
1171	static const u8 oldabs_rslt[]	  = { 0xC0, 0x00, 0x00, 0x80, 0x00 };
1172	const u8 *packet = psmouse->packet;
1173
1174	if (idx < 0 || idx > 4)
1175		return false;
1176
1177	switch (pkt_type) {
1178
1179	case SYN_NEWABS:
1180	case SYN_NEWABS_RELAXED:
1181		return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
1182
1183	case SYN_NEWABS_STRICT:
1184		return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
1185
1186	case SYN_OLDABS:
1187		return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
1188
1189	default:
1190		psmouse_err(psmouse, "unknown packet type %d\n", pkt_type);
1191		return false;
1192	}
1193}
1194
1195static enum synaptics_pkt_type
1196synaptics_detect_pkt_type(struct psmouse *psmouse)
1197{
1198	int i;
1199
1200	for (i = 0; i < 5; i++) {
1201		if (!synaptics_validate_byte(psmouse, i, SYN_NEWABS_STRICT)) {
1202			psmouse_info(psmouse, "using relaxed packet validation\n");
1203			return SYN_NEWABS_RELAXED;
1204		}
1205	}
1206
1207	return SYN_NEWABS_STRICT;
1208}
1209
1210static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
1211{
1212	struct synaptics_data *priv = psmouse->private;
1213
1214	if (psmouse->pktcnt >= 6) { /* Full packet received */
1215		if (unlikely(priv->pkt_type == SYN_NEWABS))
1216			priv->pkt_type = synaptics_detect_pkt_type(psmouse);
1217
1218		if (SYN_CAP_PASS_THROUGH(priv->info.capabilities) &&
1219		    synaptics_is_pt_packet(psmouse->packet)) {
1220			if (priv->pt_port)
1221				synaptics_pass_pt_packet(priv->pt_port,
1222							 psmouse->packet);
1223		} else
1224			synaptics_process_packet(psmouse);
 
1225
1226		return PSMOUSE_FULL_PACKET;
1227	}
1228
1229	return synaptics_validate_byte(psmouse, psmouse->pktcnt - 1, priv->pkt_type) ?
1230		PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
1231}
1232
1233/*****************************************************************************
1234 *	Driver initialization/cleanup functions
1235 ****************************************************************************/
1236static void set_abs_position_params(struct input_dev *dev,
1237				    struct synaptics_device_info *info,
1238				    int x_code, int y_code)
1239{
1240	int x_min = info->x_min ?: XMIN_NOMINAL;
1241	int x_max = info->x_max ?: XMAX_NOMINAL;
1242	int y_min = info->y_min ?: YMIN_NOMINAL;
1243	int y_max = info->y_max ?: YMAX_NOMINAL;
1244	int fuzz = SYN_CAP_REDUCED_FILTERING(info->ext_cap_0c) ?
1245			SYN_REDUCED_FILTER_FUZZ : 0;
1246
1247	input_set_abs_params(dev, x_code, x_min, x_max, fuzz, 0);
1248	input_set_abs_params(dev, y_code, y_min, y_max, fuzz, 0);
1249	input_abs_set_res(dev, x_code, info->x_res);
1250	input_abs_set_res(dev, y_code, info->y_res);
1251}
1252
1253static int set_input_params(struct psmouse *psmouse,
1254			    struct synaptics_data *priv)
1255{
1256	struct input_dev *dev = psmouse->dev;
1257	struct synaptics_device_info *info = &priv->info;
1258	int i;
1259	int error;
1260
1261	/* Reset default psmouse capabilities */
1262	__clear_bit(EV_REL, dev->evbit);
1263	bitmap_zero(dev->relbit, REL_CNT);
1264	bitmap_zero(dev->keybit, KEY_CNT);
1265
1266	/* Things that apply to both modes */
1267	__set_bit(INPUT_PROP_POINTER, dev->propbit);
1268
1269	input_set_capability(dev, EV_KEY, BTN_LEFT);
1270
1271	/* Clickpads report only left button */
1272	if (!SYN_CAP_CLICKPAD(info->ext_cap_0c)) {
1273		input_set_capability(dev, EV_KEY, BTN_RIGHT);
1274		if (SYN_CAP_MIDDLE_BUTTON(info->capabilities))
1275			input_set_capability(dev, EV_KEY, BTN_MIDDLE);
1276	}
1277
1278	if (!priv->absolute_mode) {
1279		/* Relative mode */
1280		input_set_capability(dev, EV_REL, REL_X);
1281		input_set_capability(dev, EV_REL, REL_Y);
1282		return 0;
1283	}
1284
1285	/* Absolute mode */
1286	set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y);
1287	input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
1288
1289	if (cr48_profile_sensor)
1290		input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1291
1292	if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) {
1293		set_abs_position_params(dev, info,
1294					ABS_MT_POSITION_X, ABS_MT_POSITION_Y);
1295		/* Image sensors can report per-contact pressure */
1296		input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1297
1298		error = input_mt_init_slots(dev, 2,
1299					    INPUT_MT_POINTER | INPUT_MT_TRACK);
1300		if (error)
1301			return error;
1302
1303		/* Image sensors can signal 4 and 5 finger clicks */
1304		input_set_capability(dev, EV_KEY, BTN_TOOL_QUADTAP);
1305		input_set_capability(dev, EV_KEY, BTN_TOOL_QUINTTAP);
1306	} else if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c)) {
1307		set_abs_position_params(dev, info,
1308					ABS_MT_POSITION_X, ABS_MT_POSITION_Y);
1309		/*
1310		 * Profile sensor in CR-48 tracks contacts reasonably well,
1311		 * other non-image sensors with AGM use semi-mt.
1312		 */
1313		error = input_mt_init_slots(dev, 2,
1314					    INPUT_MT_POINTER |
1315					     (cr48_profile_sensor ?
1316					      INPUT_MT_TRACK :
1317					      INPUT_MT_SEMI_MT));
1318		if (error)
1319			return error;
1320
1321		/*
1322		 * For semi-mt devices we send ABS_X/Y ourselves instead of
1323		 * input_mt_report_pointer_emulation. But
1324		 * input_mt_init_slots() resets the fuzz to 0, leading to a
1325		 * filtered ABS_MT_POSITION_X but an unfiltered ABS_X
1326		 * position. Let's re-initialize ABS_X/Y here.
1327		 */
1328		if (!cr48_profile_sensor)
1329			set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y);
1330	}
1331
1332	if (SYN_CAP_PALMDETECT(info->capabilities))
1333		input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
1334
1335	input_set_capability(dev, EV_KEY, BTN_TOUCH);
1336	input_set_capability(dev, EV_KEY, BTN_TOOL_FINGER);
1337
1338	if (synaptics_has_multifinger(priv)) {
1339		input_set_capability(dev, EV_KEY, BTN_TOOL_DOUBLETAP);
1340		input_set_capability(dev, EV_KEY, BTN_TOOL_TRIPLETAP);
1341	}
1342
1343	if (SYN_CAP_FOUR_BUTTON(info->capabilities) ||
1344	    SYN_CAP_MIDDLE_BUTTON(info->capabilities)) {
1345		input_set_capability(dev, EV_KEY, BTN_FORWARD);
1346		input_set_capability(dev, EV_KEY, BTN_BACK);
1347	}
1348
1349	if (!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10))
1350		for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(info->ext_cap); i++)
1351			input_set_capability(dev, EV_KEY, BTN_0 + i);
1352
1353	if (SYN_CAP_CLICKPAD(info->ext_cap_0c)) {
1354		__set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
1355		if (psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1356		    !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10))
1357			__set_bit(INPUT_PROP_TOPBUTTONPAD, dev->propbit);
1358	}
1359
1360	return 0;
1361}
1362
1363static ssize_t synaptics_show_disable_gesture(struct psmouse *psmouse,
1364					      void *data, char *buf)
1365{
1366	struct synaptics_data *priv = psmouse->private;
1367
1368	return sprintf(buf, "%c\n", priv->disable_gesture ? '1' : '0');
1369}
1370
1371static ssize_t synaptics_set_disable_gesture(struct psmouse *psmouse,
1372					     void *data, const char *buf,
1373					     size_t len)
1374{
1375	struct synaptics_data *priv = psmouse->private;
1376	unsigned int value;
1377	int err;
1378
1379	err = kstrtouint(buf, 10, &value);
1380	if (err)
1381		return err;
1382
1383	if (value > 1)
1384		return -EINVAL;
1385
1386	if (value == priv->disable_gesture)
1387		return len;
1388
1389	priv->disable_gesture = value;
1390	if (value)
1391		priv->mode |= SYN_BIT_DISABLE_GESTURE;
1392	else
1393		priv->mode &= ~SYN_BIT_DISABLE_GESTURE;
1394
1395	if (synaptics_mode_cmd(psmouse, priv->mode))
1396		return -EIO;
1397
1398	return len;
1399}
1400
1401PSMOUSE_DEFINE_ATTR(disable_gesture, S_IWUSR | S_IRUGO, NULL,
1402		    synaptics_show_disable_gesture,
1403		    synaptics_set_disable_gesture);
1404
1405static void synaptics_disconnect(struct psmouse *psmouse)
1406{
1407	struct synaptics_data *priv = psmouse->private;
1408
1409	/*
1410	 * We might have left a breadcrumb when trying to
1411	 * set up SMbus companion.
1412	 */
1413	psmouse_smbus_cleanup(psmouse);
1414
1415	if (!priv->absolute_mode &&
1416			SYN_ID_DISGEST_SUPPORTED(priv->info.identity))
1417		device_remove_file(&psmouse->ps2dev.serio->dev,
1418				   &psmouse_attr_disable_gesture.dattr);
1419
1420	synaptics_reset(psmouse);
1421	kfree(priv);
1422	psmouse->private = NULL;
1423}
1424
1425static int synaptics_reconnect(struct psmouse *psmouse)
1426{
1427	struct synaptics_data *priv = psmouse->private;
1428	struct synaptics_device_info info;
1429	u8 param[2];
1430	int retry = 0;
1431	int error;
1432
1433	do {
1434		psmouse_reset(psmouse);
1435		if (retry) {
1436			/*
1437			 * On some boxes, right after resuming, the touchpad
1438			 * needs some time to finish initializing (I assume
1439			 * it needs time to calibrate) and start responding
1440			 * to Synaptics-specific queries, so let's wait a
1441			 * bit.
1442			 */
1443			ssleep(1);
1444		}
1445		ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETID);
1446		error = synaptics_detect(psmouse, 0);
1447	} while (error && ++retry < 3);
1448
1449	if (error)
1450		return error;
1451
1452	if (retry > 1)
1453		psmouse_dbg(psmouse, "reconnected after %d tries\n", retry);
1454
1455	error = synaptics_query_hardware(psmouse, &info);
1456	if (error) {
1457		psmouse_err(psmouse, "Unable to query device.\n");
1458		return error;
1459	}
1460
1461	error = synaptics_set_mode(psmouse);
1462	if (error) {
1463		psmouse_err(psmouse, "Unable to initialize device.\n");
1464		return error;
1465	}
1466
1467	if (info.identity != priv->info.identity ||
1468	    info.model_id != priv->info.model_id ||
1469	    info.capabilities != priv->info.capabilities ||
1470	    info.ext_cap != priv->info.ext_cap) {
1471		psmouse_err(psmouse,
1472			    "hardware appears to be different: id(%u-%u), model(%u-%u), caps(%x-%x), ext(%x-%x).\n",
1473			    priv->info.identity, info.identity,
1474			    priv->info.model_id, info.model_id,
1475			    priv->info.capabilities, info.capabilities,
1476			    priv->info.ext_cap, info.ext_cap);
1477		return -ENXIO;
1478	}
1479
1480	return 0;
1481}
1482
1483static bool impaired_toshiba_kbc;
1484
1485static const struct dmi_system_id toshiba_dmi_table[] __initconst = {
1486#if defined(CONFIG_DMI) && defined(CONFIG_X86)
1487	{
1488		/* Toshiba Satellite */
1489		.matches = {
1490			DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1491			DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
1492		},
1493	},
1494	{
1495		/* Toshiba Dynabook */
1496		.matches = {
1497			DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1498			DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"),
1499		},
1500	},
1501	{
1502		/* Toshiba Portege M300 */
1503		.matches = {
1504			DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1505			DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"),
1506		},
1507
1508	},
1509	{
1510		/* Toshiba Portege M300 */
1511		.matches = {
1512			DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1513			DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"),
1514			DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"),
1515		},
1516
1517	},
1518#endif
1519	{ }
1520};
1521
1522static bool broken_olpc_ec;
1523
1524static const struct dmi_system_id olpc_dmi_table[] __initconst = {
1525#if defined(CONFIG_DMI) && defined(CONFIG_OLPC)
1526	{
1527		/* OLPC XO-1 or XO-1.5 */
1528		.matches = {
1529			DMI_MATCH(DMI_SYS_VENDOR, "OLPC"),
1530			DMI_MATCH(DMI_PRODUCT_NAME, "XO"),
1531		},
1532	},
1533#endif
1534	{ }
1535};
1536
1537static const struct dmi_system_id __initconst cr48_dmi_table[] = {
1538#if defined(CONFIG_DMI) && defined(CONFIG_X86)
1539	{
1540		/* Cr-48 Chromebook (Codename Mario) */
1541		.matches = {
1542			DMI_MATCH(DMI_SYS_VENDOR, "IEC"),
1543			DMI_MATCH(DMI_PRODUCT_NAME, "Mario"),
1544		},
1545	},
1546#endif
1547	{ }
1548};
1549
1550void __init synaptics_module_init(void)
1551{
1552	impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table);
1553	broken_olpc_ec = dmi_check_system(olpc_dmi_table);
1554	cr48_profile_sensor = dmi_check_system(cr48_dmi_table);
1555}
1556
1557static int synaptics_init_ps2(struct psmouse *psmouse,
1558			      struct synaptics_device_info *info,
1559			      bool absolute_mode)
1560{
1561	struct synaptics_data *priv;
1562	int err;
1563
1564	synaptics_apply_quirks(psmouse, info);
1565
1566	psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL);
1567	if (!priv)
1568		return -ENOMEM;
1569
1570	priv->info = *info;
1571	priv->absolute_mode = absolute_mode;
1572	if (SYN_ID_DISGEST_SUPPORTED(info->identity))
1573		priv->disable_gesture = true;
1574
1575	/*
1576	 * Unfortunately ForcePad capability is not exported over PS/2,
1577	 * so we have to resort to checking PNP IDs.
1578	 */
1579	priv->is_forcepad = psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids);
1580
1581	err = synaptics_set_mode(psmouse);
1582	if (err) {
1583		psmouse_err(psmouse, "Unable to initialize device.\n");
1584		goto init_fail;
1585	}
1586
1587	priv->pkt_type = SYN_MODEL_NEWABS(info->model_id) ?
1588					SYN_NEWABS : SYN_OLDABS;
1589
1590	psmouse_info(psmouse,
1591		     "Touchpad model: %lu, fw: %lu.%lu, id: %#x, caps: %#x/%#x/%#x/%#x, board id: %u, fw id: %u\n",
1592		     SYN_ID_MODEL(info->identity),
1593		     SYN_ID_MAJOR(info->identity), SYN_ID_MINOR(info->identity),
1594		     info->model_id,
1595		     info->capabilities, info->ext_cap, info->ext_cap_0c,
1596		     info->ext_cap_10, info->board_id, info->firmware_id);
1597
1598	err = set_input_params(psmouse, priv);
1599	if (err) {
1600		psmouse_err(psmouse,
1601			    "failed to set up capabilities: %d\n", err);
1602		goto init_fail;
1603	}
1604
1605	/*
1606	 * Encode touchpad model so that it can be used to set
1607	 * input device->id.version and be visible to userspace.
1608	 * Because version is __u16 we have to drop something.
1609	 * Hardware info bits seem to be good candidates as they
1610	 * are documented to be for Synaptics corp. internal use.
1611	 */
1612	psmouse->model = ((info->model_id & 0x00ff0000) >> 8) |
1613			  (info->model_id & 0x000000ff);
1614
1615	if (absolute_mode) {
1616		psmouse->protocol_handler = synaptics_process_byte;
1617		psmouse->pktsize = 6;
1618	} else {
1619		/* Relative mode follows standard PS/2 mouse protocol */
1620		psmouse->protocol_handler = psmouse_process_byte;
1621		psmouse->pktsize = 3;
1622	}
1623
1624	psmouse->set_rate = synaptics_set_rate;
1625	psmouse->disconnect = synaptics_disconnect;
1626	psmouse->reconnect = synaptics_reconnect;
1627	psmouse->fast_reconnect = NULL;
1628	psmouse->cleanup = synaptics_reset;
1629	/* Synaptics can usually stay in sync without extra help */
1630	psmouse->resync_time = 0;
1631
1632	if (SYN_CAP_PASS_THROUGH(info->capabilities))
1633		synaptics_pt_create(psmouse);
1634
1635	/*
1636	 * Toshiba's KBC seems to have trouble handling data from
1637	 * Synaptics at full rate.  Switch to a lower rate (roughly
1638	 * the same rate as a standard PS/2 mouse).
1639	 */
1640	if (psmouse->rate >= 80 && impaired_toshiba_kbc) {
1641		psmouse_info(psmouse,
1642			     "Toshiba %s detected, limiting rate to 40pps.\n",
1643			     dmi_get_system_info(DMI_PRODUCT_NAME));
1644		psmouse->rate = 40;
1645	}
1646
1647	if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(info->identity)) {
1648		err = device_create_file(&psmouse->ps2dev.serio->dev,
1649					 &psmouse_attr_disable_gesture.dattr);
1650		if (err) {
1651			psmouse_err(psmouse,
1652				    "Failed to create disable_gesture attribute (%d)",
1653				    err);
1654			goto init_fail;
1655		}
1656	}
1657
1658	return 0;
1659
1660 init_fail:
1661	kfree(priv);
1662	return err;
1663}
1664
1665static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode)
1666{
1667	struct synaptics_device_info info;
1668	int error;
1669
1670	psmouse_reset(psmouse);
1671
1672	error = synaptics_query_hardware(psmouse, &info);
1673	if (error) {
1674		psmouse_err(psmouse, "Unable to query device: %d\n", error);
1675		return error;
1676	}
1677
1678	return synaptics_init_ps2(psmouse, &info, absolute_mode);
1679}
1680
1681int synaptics_init_absolute(struct psmouse *psmouse)
1682{
1683	return __synaptics_init(psmouse, true);
1684}
1685
1686int synaptics_init_relative(struct psmouse *psmouse)
1687{
1688	return __synaptics_init(psmouse, false);
1689}
1690
1691static int synaptics_setup_ps2(struct psmouse *psmouse,
1692			       struct synaptics_device_info *info)
1693{
1694	bool absolute_mode = true;
1695	int error;
1696
1697	/*
1698	 * The OLPC XO has issues with Synaptics' absolute mode; the constant
1699	 * packet spew overloads the EC such that key presses on the keyboard
1700	 * are missed.  Given that, don't even attempt to use Absolute mode.
1701	 * Relative mode seems to work just fine.
1702	 */
1703	if (broken_olpc_ec) {
1704		psmouse_info(psmouse,
1705			     "OLPC XO detected, forcing relative protocol.\n");
1706		absolute_mode = false;
1707	}
1708
1709	error = synaptics_init_ps2(psmouse, info, absolute_mode);
1710	if (error)
1711		return error;
1712
1713	return absolute_mode ? PSMOUSE_SYNAPTICS : PSMOUSE_SYNAPTICS_RELATIVE;
1714}
1715
1716#else /* CONFIG_MOUSE_PS2_SYNAPTICS */
1717
1718void __init synaptics_module_init(void)
1719{
1720}
1721
1722static int __maybe_unused
1723synaptics_setup_ps2(struct psmouse *psmouse,
1724		    struct synaptics_device_info *info)
1725{
1726	return -ENOSYS;
1727}
1728
1729#endif /* CONFIG_MOUSE_PS2_SYNAPTICS */
1730
1731#ifdef CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS
1732
1733/*
1734 * The newest Synaptics device can use a secondary bus (called InterTouch) which
1735 * provides a better bandwidth and allow a better control of the touchpads.
1736 * This is used to decide if we need to use this bus or not.
1737 */
1738enum {
1739	SYNAPTICS_INTERTOUCH_NOT_SET = -1,
1740	SYNAPTICS_INTERTOUCH_OFF,
1741	SYNAPTICS_INTERTOUCH_ON,
1742};
1743
1744static int synaptics_intertouch = IS_ENABLED(CONFIG_RMI4_SMB) ?
1745		SYNAPTICS_INTERTOUCH_NOT_SET : SYNAPTICS_INTERTOUCH_OFF;
1746module_param_named(synaptics_intertouch, synaptics_intertouch, int, 0644);
1747MODULE_PARM_DESC(synaptics_intertouch, "Use a secondary bus for the Synaptics device.");
1748
1749static int synaptics_create_intertouch(struct psmouse *psmouse,
1750				       struct synaptics_device_info *info,
1751				       bool leave_breadcrumbs)
1752{
1753	bool topbuttonpad =
1754		psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1755		!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10);
1756	const struct rmi_device_platform_data pdata = {
1757		.reset_delay_ms = 30,
1758		.sensor_pdata = {
1759			.sensor_type = rmi_sensor_touchpad,
1760			.axis_align.flip_y = true,
1761			.kernel_tracking = false,
1762			.topbuttonpad = topbuttonpad,
1763		},
1764		.gpio_data = {
1765			.buttonpad = SYN_CAP_CLICKPAD(info->ext_cap_0c),
1766			.trackstick_buttons =
1767				!!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10),
1768		},
1769	};
1770	const struct i2c_board_info intertouch_board = {
1771		I2C_BOARD_INFO("rmi4_smbus", 0x2c),
1772		.flags = I2C_CLIENT_HOST_NOTIFY,
1773	};
1774
1775	return psmouse_smbus_init(psmouse, &intertouch_board,
1776				  &pdata, sizeof(pdata), true,
1777				  leave_breadcrumbs);
1778}
1779
1780/*
1781 * synaptics_setup_intertouch - called once the PS/2 devices are enumerated
1782 * and decides to instantiate a SMBus InterTouch device.
1783 */
1784static int synaptics_setup_intertouch(struct psmouse *psmouse,
1785				      struct synaptics_device_info *info,
1786				      bool leave_breadcrumbs)
1787{
1788	int error;
1789
1790	if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_OFF)
1791		return -ENXIO;
1792
1793	if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_NOT_SET) {
1794		if (!psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1795		    !psmouse_matches_pnp_id(psmouse, smbus_pnp_ids)) {
1796
1797			if (!psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids))
1798				psmouse_info(psmouse,
1799					     "Your touchpad (%s) says it can support a different bus. "
1800					     "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",
1801					     psmouse->ps2dev.serio->firmware_id);
1802
1803			return -ENXIO;
1804		}
1805	}
1806
1807	psmouse_info(psmouse, "Trying to set up SMBus access\n");
1808
1809	error = synaptics_create_intertouch(psmouse, info, leave_breadcrumbs);
1810	if (error) {
1811		if (error == -EAGAIN)
1812			psmouse_info(psmouse, "SMbus companion is not ready yet\n");
1813		else
1814			psmouse_err(psmouse, "unable to create intertouch device\n");
1815
1816		return error;
1817	}
1818
1819	return 0;
1820}
1821
1822int synaptics_init_smbus(struct psmouse *psmouse)
1823{
1824	struct synaptics_device_info info;
1825	int error;
1826
1827	psmouse_reset(psmouse);
1828
1829	error = synaptics_query_hardware(psmouse, &info);
1830	if (error) {
1831		psmouse_err(psmouse, "Unable to query device: %d\n", error);
1832		return error;
1833	}
1834
1835	if (!SYN_CAP_INTERTOUCH(info.ext_cap_0c))
1836		return -ENXIO;
1837
1838	return synaptics_create_intertouch(psmouse, &info, false);
1839}
1840
1841#else /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1842
1843static int __maybe_unused
1844synaptics_setup_intertouch(struct psmouse *psmouse,
1845			   struct synaptics_device_info *info,
1846			   bool leave_breadcrumbs)
1847{
1848	return -ENOSYS;
1849}
1850
1851int synaptics_init_smbus(struct psmouse *psmouse)
1852{
1853	return -ENOSYS;
1854}
1855
1856#endif /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1857
1858#if defined(CONFIG_MOUSE_PS2_SYNAPTICS) || \
1859    defined(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)
1860
1861int synaptics_init(struct psmouse *psmouse)
1862{
1863	struct synaptics_device_info info;
1864	int error;
1865	int retval;
1866
1867	psmouse_reset(psmouse);
1868
1869	error = synaptics_query_hardware(psmouse, &info);
1870	if (error) {
1871		psmouse_err(psmouse, "Unable to query device: %d\n", error);
1872		return error;
1873	}
1874
1875	if (SYN_CAP_INTERTOUCH(info.ext_cap_0c)) {
1876		if ((!IS_ENABLED(CONFIG_RMI4_SMB) ||
1877		     !IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)) &&
1878		    /* Forcepads need F21, which is not ready */
1879		    !psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids)) {
1880			psmouse_warn(psmouse,
1881				     "The touchpad can support a better bus than the too old PS/2 protocol. "
1882				     "Make sure MOUSE_PS2_SYNAPTICS_SMBUS and RMI4_SMB are enabled to get a better touchpad experience.\n");
1883		}
1884
1885		error = synaptics_setup_intertouch(psmouse, &info, true);
1886		if (!error)
1887			return PSMOUSE_SYNAPTICS_SMBUS;
1888	}
1889
1890	retval = synaptics_setup_ps2(psmouse, &info);
1891	if (retval < 0) {
1892		/*
1893		 * Not using any flavor of Synaptics support, so clean up
1894		 * SMbus breadcrumbs, if any.
1895		 */
1896		psmouse_smbus_cleanup(psmouse);
1897	}
1898
1899	return retval;
1900}
1901
1902#else /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1903
1904int synaptics_init(struct psmouse *psmouse)
1905{
1906	return -ENOSYS;
1907}
1908
1909#endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */