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