Merge tag 'trace-v7.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-tracegrafted

Pull tracing fixes from Steven Rostedt:

 - Don't destroy user event fields when removal fails

   User event fields are destroyed before the event is removed from
   visibility. But that can fail leaving the still visible event with no
   fields. Move the destroying of the fields to after the event is
   successfully removed from visibility.

 - Initialize function graph state is fork before calling
   copy_exec_state()

   For non-CLONE_VM forks, copy_exec_state() allocates a new
   task_exec_state. If that allocation fails, ftrace_graph_exit_task()
   will free the tasks ret_stack pointer. Since that pointer is still
   using the parent's ret_stack, it mistakenly frees the parent's
   pointer too.

   Call ftrace_graph_init() on the task first which will NULL out the
   new tasks's ret_stack and if the copy fails, it will not free
   anything.

 - Remove FGRAPH_MAX_INDEX

   The macro FGRAPH_MAX_INDEX was added but never used. Remove it.

 - Save ent_size in function graph printing of nested functions

   The function graph tracer needs to look at the next event to see if
   the next event is the return of the current function entry. If it is,
   it prints a single line:

	ktime_get();

   Otherwise it prints it like a nested function:

	tick_nohz_irq_exit() {
	    ktime_get();
	    kcpustat_irq_exit();
	}

   In order to look at the next event, it must save the current event so
   that it has the information to print from it. It saves the event in
   the iterator descriptor called "ent". What it doesn't save is the
   ent_size of the event which is now used to know if the function graph
   arguments are to be printed. The peek doesn't save the size so the
   size used happens to be that of the size of the last event that was
   seen.

   Save the entry event size in the iterator descriptor so that the
   correct size is used.

 - Fix several errors with freeing data in the histogram code

   The histogram code had a lot of leaked or or incorrect accounting
   when failures happen. Correct them.

 - Fix histogram regression of .percent and .graph modifiers

   Up until 6.3 histogram values could have "percent" or "graph"
   modifiers that changed how they were printed. But a change that added
   restricting histograms values from being strings, stack traces and
   other modifiers inadvertently prevented them from using the percent
   and graph modifiers, which were legal use cases for values.

   Put back the percent and graph modifiers.

 - Fix various typos in the comments

 - Set the trace_clock before initializing a histogram with clock
   argument

   The histogram API allows the user to specific which trace clock to
   use via a "clock=" string. The histogram is set up first before the
   clock is checked. If the passed in clock is not valid, it exits
   without fully fixing up the histogram leaving it on the list and a
   use-after-free can trigger.

   Update the clock argument first and if it fails then exit gracefully
   before the histogram trigger is placed on any lists.

 - Restore :mod: trailer after parsing in ftrace_set_clr_event

   The function ftrace_set_clr_event() modifies the parse string and
   needs to put it back to what was passed in. It searches for ":mod:"
   via a strsep() but fails to put back the first ':' in the string.

   Add back the ':' in the passed in string.

 - Take trace_array reference when opening a tracer options file

   The options files are dynamically created and some tracers add their
   own options. When a tracer adds their own list of options, the
   trace_array holding them has an array to hold the list of options for
   each tracer. This array increases in size via a krealloc(), and the
   new entry gets a newly allocated array to hold the options of the new
   tracer being added.

   The element in each entry of the tracer's option array holds a
   pointer back to the trace_array, a pointer to the tracer it is
   associated to, a pointer to the flags of the option.

   The issue is that these arrays are freed when the trace_array is
   freed when its instance it represents is removed from the instances
   directory. There's a race that an open of one of these options files
   can happen when the instance is being removed.

   Add a new helper function to be called by the open function of the
   options file to iterate all existing trace_arrays under a lock and
   find the one that has the given option element in one of it's tracer
   arrays. If found, then update the associated trace_array's reference
   counter to keep it from being freed. If not found, have the open call
   return -ENODEV.

 - Disable interrupts when acquiring the lock in rb_wake_up_waiters()

   The function rb_wake_up_waiters() assumes it will be called in
   interrupt context and does not disable irqs when taking
   cpu_buffer->reader_lock, which can be called in hard interrupt
   context. The issue is in PREEMPT_RT, this function is called in
   thread context leaving this lock open to a deadlock.

   Take the lock with interrupts disabled.

 - Use rcu_assign_pointer() for tmp_ops filter hash

   The tmp_ops used in update_ftrace_direct_mod() assigns its
   filter_hash field directly, but that field is annotated as __rcu and
   sparse complains. Assign it with rcu_assign_pointer()

 - Fix use-after-free in enable_trigger_private_data_free()

   The trace_event_call is accessed through the event_trigger_data's
   trace_event_file pointer to put the trace_event_call on freeing. The
   issue is that the trace_event_file data may have been freed already
   causing a use-after-free. Add a field to the event_trigger_data that
   points directly to the trace_event_call so that it can decrement its
   reference directly without needing to go through the
   trace_event_file.

 - Fix accounting of buffer data remote headers

   trace_buffer_desc_size() and trace_remote_alloc_buffer() undercount
   the number of pages is needed for the asked for size as it doesn't
   take into account the meta data on each page. Add a helper function
   to do the calculation properly and use that in these functions.

 - Catch nr_page_va overflow in ring_buffer_desc sizing

   The number of pages per remote ring buffer is capped by
   ring_buffer_desc::nr_page_va (32 bits). A buffer_size large enough to
   overflow that field would silently allocate a descriptor smaller than
   what was asked for.

 - Do not resize the subbuf order if any per_cpu buffer is disabled

   The mmapping of ring buffers disables resizing the subbuffers, but it
   is done per-cpu whereas the subbuf size change is done for all the
   per_cpu buffers under the buffer->mutex. It could change the size of
   some while the mapping is happening on others. Have the resize of the
   subbuf order check all the per_cpu buffers under the lock to see if
   any of them is disabled before starting and causing an inconsistency
   between buffers that are being mapped.

* tag 'trace-v7.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace: (25 commits)
  ring-buffer: Check resize_disabled before publishing the new subbuf order
  tracing/remotes: Catch nr_page_va overflow in ring_buffer_desc sizing
  tracing/remotes: Account for ring buffer page header in size calculation
  tracing: Don't dereference trace_event_file in deferred trigger free
  ftrace: Use rcu_assign_pointer() for tmp_ops filter hash
  ring-buffer: Acquire the lock with irqsave in rb_wake_up_waiters()
  tracing: Take trace_array reference when opening a tracer options file
  tracing: Fix ring_buffer_read_page_size() kernel-doc
  tracing: Restore :mod: trailer after parsing in ftrace_set_clr_event()
  tracing: Fix memory corruption from a "STACKTRACE" histogram key
  tracing: Fix memory corruption from the histogram stacktrace modifier
  tracing: Undo the registration when enabling the histogram trigger fails
  tracing: Take the reference before publishing the named histogram trigger
  tracing: Set the trace clock before registering the histogram trigger
  tracing: Fix typo "preceeded" in comment
  tracing: Fix typo "availabe" in comment
  tracing: Let histogram values keep the percent and graph modifiers
  tracing: Keep the entry count when the histogram stats allocation fails
  tracing: Free histogram the field rejected for a bad modifier
  tracing: Free histogram the var ref when its initialization fails
  ...

1 files changed, 1945 insertions, 0 deletions

diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c
new file mode 100644
index 000000000..2170bbe4c
--- /dev/null
+++ b/drivers/input/mouse/synaptics.c
@@ -0,0 +1,1945 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Synaptics TouchPad PS/2 mouse driver
+ *
+ *   2003 Dmitry Torokhov <dtor@mail.ru>
+ *     Added support for pass-through port. Special thanks to Peter Berg Larsen
+ *     for explaining various Synaptics quirks.
+ *
+ *   2003 Peter Osterlund <petero2@telia.com>
+ *     Ported to 2.5 input device infrastructure.
+ *
+ *   Copyright (C) 2001 Stefan Gmeiner <riddlebox@freesurf.ch>
+ *     start merging tpconfig and gpm code to a xfree-input module
+ *     adding some changes and extensions (ex. 3rd and 4th button)
+ *
+ *   Copyright (c) 1997 C. Scott Ananian <cananian@alumni.priceton.edu>
+ *   Copyright (c) 1998-2000 Bruce Kalk <kall@compass.com>
+ *     code for the special synaptics commands (from the tpconfig-source)
+ *
+ * Trademarks are the property of their respective owners.
+ */
+
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/dmi.h>
+#include <linux/input/mt.h>
+#include <linux/serio.h>
+#include <linux/libps2.h>
+#include <linux/rmi.h>
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include "psmouse.h"
+#include "synaptics.h"
+
+/*
+ * The x/y limits are taken from the Synaptics TouchPad interfacing Guide,
+ * section 2.3.2, which says that they should be valid regardless of the
+ * actual size of the sensor.
+ * Note that newer firmware allows querying device for maximum useable
+ * coordinates.
+ */
+#define XMIN 0
+#define XMAX 6143
+#define YMIN 0
+#define YMAX 6143
+#define XMIN_NOMINAL 1472
+#define XMAX_NOMINAL 5472
+#define YMIN_NOMINAL 1408
+#define YMAX_NOMINAL 4448
+
+/* Size in bits of absolute position values reported by the hardware */
+#define ABS_POS_BITS 13
+
+/*
+ * These values should represent the absolute maximum value that will
+ * be reported for a positive position value. Some Synaptics firmware
+ * uses this value to indicate a finger near the edge of the touchpad
+ * whose precise position cannot be determined.
+ *
+ * At least one touchpad is known to report positions in excess of this
+ * value which are actually negative values truncated to the 13-bit
+ * reporting range. These values have never been observed to be lower
+ * than 8184 (i.e. -8), so we treat all values greater than 8176 as
+ * negative and any other value as positive.
+ */
+#define X_MAX_POSITIVE 8176
+#define Y_MAX_POSITIVE 8176
+
+/* maximum ABS_MT_POSITION displacement (in mm) */
+#define DMAX 10
+
+/*****************************************************************************
+ *	Stuff we need even when we do not want native Synaptics support
+ ****************************************************************************/
+
+/*
+ * Set the synaptics touchpad mode byte by special commands
+ */
+static int synaptics_mode_cmd(struct psmouse *psmouse, u8 mode)
+{
+	u8 param[1];
+	int error;
+
+	error = ps2_sliced_command(&psmouse->ps2dev, mode);
+	if (error)
+		return error;
+
+	param[0] = SYN_PS_SET_MODE2;
+	error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_SETRATE);
+	if (error)
+		return error;
+
+	return 0;
+}
+
+int synaptics_detect(struct psmouse *psmouse, bool set_properties)
+{
+	struct ps2dev *ps2dev = &psmouse->ps2dev;
+	u8 param[4] = { 0 };
+
+	ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
+	ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
+	ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
+	ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
+	ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
+
+	if (param[1] != 0x47)
+		return -ENODEV;
+
+	if (set_properties) {
+		psmouse->vendor = "Synaptics";
+		psmouse->name = "TouchPad";
+	}
+
+	return 0;
+}
+
+void synaptics_reset(struct psmouse *psmouse)
+{
+	/* reset touchpad back to relative mode, gestures enabled */
+	synaptics_mode_cmd(psmouse, 0);
+}
+
+#if defined(CONFIG_MOUSE_PS2_SYNAPTICS) || \
+    defined(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)
+
+/* This list has been kindly provided by Synaptics. */
+static const char * const topbuttonpad_pnp_ids[] = {
+	"LEN0017",
+	"LEN0018",
+	"LEN0019",
+	"LEN0023",
+	"LEN002A",
+	"LEN002B",
+	"LEN002C",
+	"LEN002D",
+	"LEN002E",
+	"LEN0033", /* Helix */
+	"LEN0034", /* T431s, L440, L540, T540, W540, X1 Carbon 2nd */
+	"LEN0035", /* X240 */
+	"LEN0036", /* T440 */
+	"LEN0037", /* X1 Carbon 2nd */
+	"LEN0038",
+	"LEN0039", /* T440s */
+	"LEN0041",
+	"LEN0042", /* Yoga */
+	"LEN0045",
+	"LEN0047",
+	"LEN2000", /* S540 */
+	"LEN2001", /* Edge E431 */
+	"LEN2002", /* Edge E531 */
+	"LEN2003",
+	"LEN2004", /* L440 */
+	"LEN2005",
+	"LEN2006", /* Edge E440/E540 */
+	"LEN2007",
+	"LEN2008",
+	"LEN2009",
+	"LEN200A",
+	"LEN200B",
+	NULL
+};
+
+#ifdef CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS
+static const char * const smbus_pnp_ids[] = {
+	/* all of the topbuttonpad_pnp_ids are valid, we just add some extras */
+	"DLL0597", /* Dell Inspiron 3521 */
+	"DLL060d", /* Dell Precision M3800 */
+	"LEN0048", /* X1 Carbon 3 */
+	"LEN0046", /* X250 */
+	"LEN0049", /* Yoga 11e */
+	"LEN004a", /* W541 */
+	"LEN005b", /* P50 */
+	"LEN005e", /* T560 */
+	"LEN006c", /* T470s */
+	"LEN007a", /* T470s */
+	"LEN0071", /* T480 */
+	"LEN0072", /* X1 Carbon Gen 5 (2017) - Elan/ALPS trackpoint */
+	"LEN0073", /* X1 Carbon G5 (Elantech) */
+	"LEN0091", /* X1 Carbon 6 */
+	"LEN0092", /* X1 Carbon 6 */
+	"LEN0093", /* T480 */
+	"LEN0096", /* X280 */
+	"LEN0097", /* X280 -> ALPS trackpoint */
+	"LEN0099", /* X1 Extreme Gen 1 / P1 Gen 1 */
+	"LEN009b", /* T580 */
+	"LEN0402", /* X1 Extreme Gen 2 / P1 Gen 2 */
+	"LEN040f", /* P1 Gen 3 */
+	"LEN0411", /* L14 Gen 1 */
+	"LEN200f", /* T450s */
+	"LEN2044", /* L470  */
+	"LEN2054", /* E480 */
+	"LEN2055", /* E580 */
+	"LEN2058", /* E490 */
+	"LEN2068", /* T14 Gen 1 */
+	"SYN1221", /* TUXEDO InfinityBook Pro 14 v5 */
+	"SYN3003", /* HP EliteBook 850 G1 */
+	"SYN3015", /* HP EliteBook 840 G2 */
+	"SYN3052", /* HP EliteBook 840 G4 */
+	"SYN3221", /* HP 15-ay000 */
+	"SYN323d", /* HP Spectre X360 13-w013dx */
+	"SYN3257", /* HP Envy 13-ad105ng */
+	"TOS01f6", /* Dynabook Portege X30L-G */
+	"TOS0213", /* Dynabook Portege X30-D */
+	NULL
+};
+#endif
+
+static const char * const forcepad_pnp_ids[] = {
+	"SYN300D",
+	"SYN3014",
+	NULL
+};
+
+/*
+ * Send a command to the synaptics touchpad by special commands
+ */
+static int synaptics_send_cmd(struct psmouse *psmouse, u8 cmd, u8 *param)
+{
+	int error;
+
+	error = ps2_sliced_command(&psmouse->ps2dev, cmd);
+	if (error)
+		return error;
+
+	error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO);
+	if (error)
+		return error;
+
+	return 0;
+}
+
+static int synaptics_query_int(struct psmouse *psmouse, u8 query_cmd, u32 *val)
+{
+	int error;
+	union {
+		__be32 be_val;
+		char buf[4];
+	} resp = { 0 };
+
+	error = synaptics_send_cmd(psmouse, query_cmd, resp.buf + 1);
+	if (error)
+		return error;
+
+	*val = be32_to_cpu(resp.be_val);
+	return 0;
+}
+
+/*
+ * Identify Touchpad
+ * See also the SYN_ID_* macros
+ */
+static int synaptics_identify(struct psmouse *psmouse,
+			      struct synaptics_device_info *info)
+{
+	int error;
+
+	error = synaptics_query_int(psmouse, SYN_QUE_IDENTIFY, &info->identity);
+	if (error)
+		return error;
+
+	return SYN_ID_IS_SYNAPTICS(info->identity) ? 0 : -ENXIO;
+}
+
+/*
+ * Read the model-id bytes from the touchpad
+ * see also SYN_MODEL_* macros
+ */
+static int synaptics_model_id(struct psmouse *psmouse,
+			      struct synaptics_device_info *info)
+{
+	return synaptics_query_int(psmouse, SYN_QUE_MODEL, &info->model_id);
+}
+
+/*
+ * Read the firmware id from the touchpad
+ */
+static int synaptics_firmware_id(struct psmouse *psmouse,
+				 struct synaptics_device_info *info)
+{
+	return synaptics_query_int(psmouse, SYN_QUE_FIRMWARE_ID,
+				   &info->firmware_id);
+}
+
+/*
+ * Read the board id and the "More Extended Queries" from the touchpad
+ * The board id is encoded in the "QUERY MODES" response
+ */
+static int synaptics_query_modes(struct psmouse *psmouse,
+				 struct synaptics_device_info *info)
+{
+	u8 bid[3];
+	int error;
+
+	/* firmwares prior 7.5 have no board_id encoded */
+	if (SYN_ID_FULL(info->identity) < 0x705)
+		return 0;
+
+	error = synaptics_send_cmd(psmouse, SYN_QUE_MODES, bid);
+	if (error)
+		return error;
+
+	info->board_id = ((bid[0] & 0xfc) << 6) | bid[1];
+
+	if (SYN_MEXT_CAP_BIT(bid[0]))
+		return synaptics_query_int(psmouse, SYN_QUE_MEXT_CAPAB_10,
+					   &info->ext_cap_10);
+
+	return 0;
+}
+
+/*
+ * Read the capability-bits from the touchpad
+ * see also the SYN_CAP_* macros
+ */
+static int synaptics_capability(struct psmouse *psmouse,
+				struct synaptics_device_info *info)
+{
+	int error;
+
+	error = synaptics_query_int(psmouse, SYN_QUE_CAPABILITIES,
+				    &info->capabilities);
+	if (error)
+		return error;
+
+	info->ext_cap = info->ext_cap_0c = 0;
+
+	/*
+	 * Older firmwares had submodel ID fixed to 0x47
+	 */
+	if (SYN_ID_FULL(info->identity) < 0x705 &&
+	    SYN_CAP_SUBMODEL_ID(info->capabilities) != 0x47) {
+		return -ENXIO;
+	}
+
+	/*
+	 * Unless capExtended is set the rest of the flags should be ignored
+	 */
+	if (!SYN_CAP_EXTENDED(info->capabilities))
+		info->capabilities = 0;
+
+	if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 1) {
+		error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB,
+					    &info->ext_cap);
+		if (error) {
+			psmouse_warn(psmouse,
+				     "device claims to have extended capabilities, but I'm not able to read them.\n");
+		} else {
+			/*
+			 * if nExtBtn is greater than 8 it should be considered
+			 * invalid and treated as 0
+			 */
+			if (SYN_CAP_MULTI_BUTTON_NO(info->ext_cap) > 8)
+				info->ext_cap &= ~SYN_CAP_MB_MASK;
+		}
+	}
+
+	if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 4) {
+		error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB_0C,
+					    &info->ext_cap_0c);
+		if (error)
+			psmouse_warn(psmouse,
+				     "device claims to have extended capability 0x0c, but I'm not able to read it.\n");
+	}
+
+	return 0;
+}
+
+/*
+ * Read touchpad resolution and maximum reported coordinates
+ * Resolution is left zero if touchpad does not support the query
+ */
+static int synaptics_resolution(struct psmouse *psmouse,
+				struct synaptics_device_info *info)
+{
+	u8 resp[3];
+	int error;
+
+	if (SYN_ID_MAJOR(info->identity) < 4)
+		return 0;
+
+	error = synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, resp);
+	if (!error) {
+		if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) {
+			info->x_res = resp[0]; /* x resolution in units/mm */
+			info->y_res = resp[2]; /* y resolution in units/mm */
+		}
+	}
+
+	if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 5 &&
+	    SYN_CAP_MAX_DIMENSIONS(info->ext_cap_0c)) {
+		error = synaptics_send_cmd(psmouse,
+					   SYN_QUE_EXT_MAX_COORDS, resp);
+		if (error) {
+			psmouse_warn(psmouse,
+				     "device claims to have max coordinates query, but I'm not able to read it.\n");
+		} else {
+			info->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
+			info->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
+			psmouse_info(psmouse,
+				     "queried max coordinates: x [..%d], y [..%d]\n",
+				     info->x_max, info->y_max);
+		}
+	}
+
+	if (SYN_CAP_MIN_DIMENSIONS(info->ext_cap_0c) &&
+	    (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 7 ||
+	     /*
+	      * Firmware v8.1 does not report proper number of extended
+	      * capabilities, but has been proven to report correct min
+	      * coordinates.
+	      */
+	     SYN_ID_FULL(info->identity) == 0x801)) {
+		error = synaptics_send_cmd(psmouse,
+					   SYN_QUE_EXT_MIN_COORDS, resp);
+		if (error) {
+			psmouse_warn(psmouse,
+				     "device claims to have min coordinates query, but I'm not able to read it.\n");
+		} else {
+			info->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
+			info->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
+			psmouse_info(psmouse,
+				     "queried min coordinates: x [%d..], y [%d..]\n",
+				     info->x_min, info->y_min);
+		}
+	}
+
+	return 0;
+}
+
+static int synaptics_query_hardware(struct psmouse *psmouse,
+				    struct synaptics_device_info *info)
+{
+	int error;
+
+	memset(info, 0, sizeof(*info));
+
+	error = synaptics_identify(psmouse, info);
+	if (error)
+		return error;
+
+	error = synaptics_model_id(psmouse, info);
+	if (error)
+		return error;
+
+	error = synaptics_firmware_id(psmouse, info);
+	if (error)
+		return error;
+
+	error = synaptics_query_modes(psmouse, info);
+	if (error)
+		return error;
+
+	error = synaptics_capability(psmouse, info);
+	if (error)
+		return error;
+
+	error = synaptics_resolution(psmouse, info);
+	if (error)
+		return error;
+
+	return 0;
+}
+
+#endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
+
+#ifdef CONFIG_MOUSE_PS2_SYNAPTICS
+
+static bool cr48_profile_sensor;
+
+#define ANY_BOARD_ID 0
+struct min_max_quirk {
+	const char * const *pnp_ids;
+	struct {
+		u32 min, max;
+	} board_id;
+	u32 x_min, x_max, y_min, y_max;
+};
+
+static const struct min_max_quirk min_max_pnpid_table[] = {
+	{
+		(const char * const []){"LEN0033", NULL},
+		{ANY_BOARD_ID, ANY_BOARD_ID},
+		1024, 5052, 2258, 4832
+	},
+	{
+		(const char * const []){"LEN0042", NULL},
+		{ANY_BOARD_ID, ANY_BOARD_ID},
+		1232, 5710, 1156, 4696
+	},
+	{
+		(const char * const []){"LEN0034", "LEN0036", "LEN0037",
+					"LEN0039", "LEN2002", "LEN2004",
+					NULL},
+		{ANY_BOARD_ID, 2961},
+		1024, 5112, 2024, 4832
+	},
+	{
+		(const char * const []){"LEN2000", NULL},
+		{ANY_BOARD_ID, ANY_BOARD_ID},
+		1024, 5113, 2021, 4832
+	},
+	{
+		(const char * const []){"LEN2001", NULL},
+		{ANY_BOARD_ID, ANY_BOARD_ID},
+		1024, 5022, 2508, 4832
+	},
+	{
+		(const char * const []){"LEN2006", NULL},
+		{2691, 2691},
+		1024, 5045, 2457, 4832
+	},
+	{
+		(const char * const []){"LEN2006", NULL},
+		{ANY_BOARD_ID, ANY_BOARD_ID},
+		1264, 5675, 1171, 4688
+	},
+	{ }
+};
+
+/*****************************************************************************
+ *	Synaptics communications functions
+ ****************************************************************************/
+
+/*
+ * Synaptics touchpads report the y coordinate from bottom to top, which is
+ * opposite from what userspace expects.
+ * This function is used to invert y before reporting.
+ */
+static int synaptics_invert_y(int y)
+{
+	return YMAX_NOMINAL + YMIN_NOMINAL - y;
+}
+
+/*
+ * Apply quirk(s) if the hardware matches
+ */
+static void synaptics_apply_quirks(struct psmouse *psmouse,
+				   struct synaptics_device_info *info)
+{
+	int i;
+
+	for (i = 0; min_max_pnpid_table[i].pnp_ids; i++) {
+		if (!psmouse_matches_pnp_id(psmouse,
+					    min_max_pnpid_table[i].pnp_ids))
+			continue;
+
+		if (min_max_pnpid_table[i].board_id.min != ANY_BOARD_ID &&
+		    info->board_id < min_max_pnpid_table[i].board_id.min)
+			continue;
+
+		if (min_max_pnpid_table[i].board_id.max != ANY_BOARD_ID &&
+		    info->board_id > min_max_pnpid_table[i].board_id.max)
+			continue;
+
+		info->x_min = min_max_pnpid_table[i].x_min;
+		info->x_max = min_max_pnpid_table[i].x_max;
+		info->y_min = min_max_pnpid_table[i].y_min;
+		info->y_max = min_max_pnpid_table[i].y_max;
+		psmouse_info(psmouse,
+			     "quirked min/max coordinates: x [%d..%d], y [%d..%d]\n",
+			     info->x_min, info->x_max,
+			     info->y_min, info->y_max);
+		break;
+	}
+}
+
+static bool synaptics_has_agm(struct synaptics_data *priv)
+{
+	return (SYN_CAP_ADV_GESTURE(priv->info.ext_cap_0c) ||
+		SYN_CAP_IMAGE_SENSOR(priv->info.ext_cap_0c));
+}
+
+static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse)
+{
+	static u8 param = 0xc8;
+	int error;
+
+	error = ps2_sliced_command(&psmouse->ps2dev, SYN_QUE_MODEL);
+	if (error)
+		return error;
+
+	error = ps2_command(&psmouse->ps2dev, &param, PSMOUSE_CMD_SETRATE);
+	if (error)
+		return error;
+
+	return 0;
+}
+
+static int synaptics_set_mode(struct psmouse *psmouse)
+{
+	struct synaptics_data *priv = psmouse->private;
+	int error;
+
+	priv->mode = 0;
+	if (priv->absolute_mode)
+		priv->mode |= SYN_BIT_ABSOLUTE_MODE;
+	if (priv->disable_gesture)
+		priv->mode |= SYN_BIT_DISABLE_GESTURE;
+	if (psmouse->rate >= 80)
+		priv->mode |= SYN_BIT_HIGH_RATE;
+	if (SYN_CAP_EXTENDED(priv->info.capabilities))
+		priv->mode |= SYN_BIT_W_MODE;
+
+	error = synaptics_mode_cmd(psmouse, priv->mode);
+	if (error)
+		return error;
+
+	if (priv->absolute_mode && synaptics_has_agm(priv)) {
+		error = synaptics_set_advanced_gesture_mode(psmouse);
+		if (error) {
+			psmouse_err(psmouse,
+				    "Advanced gesture mode init failed: %d\n",
+				    error);
+			return error;
+		}
+	}
+
+	return 0;
+}
+
+static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate)
+{
+	struct synaptics_data *priv = psmouse->private;
+
+	if (rate >= 80) {
+		priv->mode |= SYN_BIT_HIGH_RATE;
+		psmouse->rate = 80;
+	} else {
+		priv->mode &= ~SYN_BIT_HIGH_RATE;
+		psmouse->rate = 40;
+	}
+
+	synaptics_mode_cmd(psmouse, priv->mode);
+}
+
+/*****************************************************************************
+ *	Synaptics pass-through PS/2 port support
+ ****************************************************************************/
+static int synaptics_pt_write(struct serio *serio, u8 c)
+{
+	struct psmouse *parent = psmouse_from_serio(serio->parent);
+	u8 rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */
+	int error;
+
+	error = ps2_sliced_command(&parent->ps2dev, c);
+	if (error)
+		return error;
+
+	error = ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE);
+	if (error)
+		return error;
+
+	return 0;
+}
+
+static int synaptics_pt_start(struct serio *serio)
+{
+	struct psmouse *parent = psmouse_from_serio(serio->parent);
+	struct synaptics_data *priv = parent->private;
+
+	guard(serio_pause_rx)(parent->ps2dev.serio);
+	priv->pt_port = serio;
+
+	return 0;
+}
+
+static void synaptics_pt_stop(struct serio *serio)
+{
+	struct psmouse *parent = psmouse_from_serio(serio->parent);
+	struct synaptics_data *priv = parent->private;
+
+	guard(serio_pause_rx)(parent->ps2dev.serio);
+	priv->pt_port = NULL;
+}
+
+static int synaptics_pt_open(struct serio *serio)
+{
+	struct psmouse *parent = psmouse_from_serio(serio->parent);
+	struct synaptics_data *priv = parent->private;
+
+	guard(serio_pause_rx)(parent->ps2dev.serio);
+	priv->pt_port_open = true;
+
+	return 0;
+}
+
+static void synaptics_pt_close(struct serio *serio)
+{
+	struct psmouse *parent = psmouse_from_serio(serio->parent);
+	struct synaptics_data *priv = parent->private;
+
+	guard(serio_pause_rx)(parent->ps2dev.serio);
+	priv->pt_port_open = false;
+}
+
+static int synaptics_is_pt_packet(u8 *buf)
+{
+	return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
+}
+
+static void synaptics_pass_pt_packet(struct synaptics_data *priv, u8 *packet)
+{
+	struct serio *ptport;
+
+	ptport = priv->pt_port;
+	if (!ptport)
+		return;
+
+	serio_interrupt(ptport, packet[1], 0);
+
+	if (priv->pt_port_open) {
+		struct psmouse *child = psmouse_from_serio(ptport);
+
+		if (child->state == PSMOUSE_ACTIVATED) {
+			serio_interrupt(ptport, packet[4], 0);
+			serio_interrupt(ptport, packet[5], 0);
+			if (child->pktsize == 4)
+				serio_interrupt(ptport, packet[2], 0);
+		}
+	}
+}
+
+static void synaptics_pt_activate(struct psmouse *psmouse)
+{
+	struct synaptics_data *priv = psmouse->private;
+	struct psmouse *child = psmouse_from_serio(priv->pt_port);
+
+	/* adjust the touchpad to child's choice of protocol */
+	if (child) {
+		if (child->pktsize == 4)
+			priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT;
+		else
+			priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT;
+
+		if (synaptics_mode_cmd(psmouse, priv->mode))
+			psmouse_warn(psmouse,
+				     "failed to switch guest protocol\n");
+	}
+}
+
+static void synaptics_pt_create(struct psmouse *psmouse)
+{
+	struct serio *serio;
+
+	serio = kzalloc_obj(*serio);
+	if (!serio) {
+		psmouse_err(psmouse,
+			    "not enough memory for pass-through port\n");
+		return;
+	}
+
+	serio->id.type = SERIO_PS_PSTHRU;
+	strscpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
+	strscpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->phys));
+	serio->write = synaptics_pt_write;
+	serio->start = synaptics_pt_start;
+	serio->stop = synaptics_pt_stop;
+	serio->open = synaptics_pt_open;
+	serio->close = synaptics_pt_close;
+	serio->parent = psmouse->ps2dev.serio;
+
+	psmouse->pt_activate = synaptics_pt_activate;
+
+	psmouse_info(psmouse, "serio: %s port at %s\n",
+		     serio->name, psmouse->phys);
+	serio_register_port(serio);
+}
+
+/*****************************************************************************
+ *	Functions to interpret the absolute mode packets
+ ****************************************************************************/
+
+static void synaptics_parse_agm(const u8 buf[],
+				struct synaptics_data *priv,
+				struct synaptics_hw_state *hw)
+{
+	struct synaptics_hw_state *agm = &priv->agm;
+	int agm_packet_type;
+
+	agm_packet_type = (buf[5] & 0x30) >> 4;
+	switch (agm_packet_type) {
+	case 1:
+		/* Gesture packet: (x, y, z) half resolution */
+		agm->w = hw->w;
+		agm->x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1;
+		agm->y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1;
+		agm->z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1;
+		break;
+
+	case 2:
+		/* AGM-CONTACT packet: we are only interested in the count */
+		priv->agm_count = buf[1];
+		break;
+
+	default:
+		break;
+	}
+}
+
+static void synaptics_parse_ext_buttons(const u8 buf[],
+					struct synaptics_data *priv,
+					struct synaptics_hw_state *hw)
+{
+	unsigned int ext_bits =
+		(SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1;
+	unsigned int ext_mask = GENMASK(ext_bits - 1, 0);
+
+	hw->ext_buttons = buf[4] & ext_mask;
+	hw->ext_buttons |= (buf[5] & ext_mask) << ext_bits;
+}
+
+static int synaptics_parse_hw_state(const u8 buf[],
+				    struct synaptics_data *priv,
+				    struct synaptics_hw_state *hw)
+{
+	memset(hw, 0, sizeof(struct synaptics_hw_state));
+
+	if (SYN_MODEL_NEWABS(priv->info.model_id)) {
+		hw->w = (((buf[0] & 0x30) >> 2) |
+			 ((buf[0] & 0x04) >> 1) |
+			 ((buf[3] & 0x04) >> 2));
+
+		if (synaptics_has_agm(priv) && hw->w == 2) {
+			synaptics_parse_agm(buf, priv, hw);
+			return 1;
+		}
+
+		hw->x = (((buf[3] & 0x10) << 8) |
+			 ((buf[1] & 0x0f) << 8) |
+			 buf[4]);
+		hw->y = (((buf[3] & 0x20) << 7) |
+			 ((buf[1] & 0xf0) << 4) |
+			 buf[5]);
+		hw->z = buf[2];
+
+		hw->left  = (buf[0] & 0x01) ? 1 : 0;
+		hw->right = (buf[0] & 0x02) ? 1 : 0;
+
+		if (priv->is_forcepad) {
+			/*
+			 * ForcePads, like Clickpads, use middle button
+			 * bits to report primary button clicks.
+			 * Unfortunately they report primary button not
+			 * only when user presses on the pad above certain
+			 * threshold, but also when there are more than one
+			 * finger on the touchpad, which interferes with
+			 * out multi-finger gestures.
+			 */
+			if (hw->z == 0) {
+				/* No contacts */
+				priv->press = priv->report_press = false;
+			} else if (hw->w >= 4 && ((buf[0] ^ buf[3]) & 0x01)) {
+				/*
+				 * Single-finger touch with pressure above
+				 * the threshold. If pressure stays long
+				 * enough, we'll start reporting primary
+				 * button. We rely on the device continuing
+				 * sending data even if finger does not
+				 * move.
+				 */
+				if  (!priv->press) {
+					priv->press_start = jiffies;
+					priv->press = true;
+				} else if (time_after(jiffies,
+						priv->press_start +
+							msecs_to_jiffies(50))) {
+					priv->report_press = true;
+				}
+			} else {
+				priv->press = false;
+			}
+
+			hw->left = priv->report_press;
+
+		} else if (SYN_CAP_CLICKPAD(priv->info.ext_cap_0c)) {
+			/*
+			 * Clickpad's button is transmitted as middle button,
+			 * however, since it is primary button, we will report
+			 * it as BTN_LEFT.
+			 */
+			hw->left = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
+
+		} else if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities)) {
+			hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
+			if (hw->w == 2)
+				hw->scroll = (s8)buf[1];
+		}
+
+		if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) {
+			hw->up   = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
+			hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;
+		}
+
+		if (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) > 0 &&
+		    ((buf[0] ^ buf[3]) & 0x02)) {
+			synaptics_parse_ext_buttons(buf, priv, hw);
+		}
+	} else {
+		hw->x = (((buf[1] & 0x1f) << 8) | buf[2]);
+		hw->y = (((buf[4] & 0x1f) << 8) | buf[5]);
+
+		hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F));
+		hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1));
+
+		hw->left  = (buf[0] & 0x01) ? 1 : 0;
+		hw->right = (buf[0] & 0x02) ? 1 : 0;
+	}
+
+	/*
+	 * Convert wrap-around values to negative. (X|Y)_MAX_POSITIVE
+	 * is used by some firmware to indicate a finger at the edge of
+	 * the touchpad whose precise position cannot be determined, so
+	 * convert these values to the maximum axis value.
+	 */
+	if (hw->x > X_MAX_POSITIVE)
+		hw->x -= 1 << ABS_POS_BITS;
+	else if (hw->x == X_MAX_POSITIVE)
+		hw->x = XMAX;
+
+	if (hw->y > Y_MAX_POSITIVE)
+		hw->y -= 1 << ABS_POS_BITS;
+	else if (hw->y == Y_MAX_POSITIVE)
+		hw->y = YMAX;
+
+	return 0;
+}
+
+static void synaptics_report_semi_mt_slot(struct input_dev *dev, int slot,
+					  bool active, int x, int y)
+{
+	input_mt_slot(dev, slot);
+	input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
+	if (active) {
+		input_report_abs(dev, ABS_MT_POSITION_X, x);
+		input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(y));
+	}
+}
+
+static void synaptics_report_semi_mt_data(struct input_dev *dev,
+					  const struct synaptics_hw_state *a,
+					  const struct synaptics_hw_state *b,
+					  int num_fingers)
+{
+	if (num_fingers >= 2) {
+		synaptics_report_semi_mt_slot(dev, 0, true, min(a->x, b->x),
+					      min(a->y, b->y));
+		synaptics_report_semi_mt_slot(dev, 1, true, max(a->x, b->x),
+					      max(a->y, b->y));
+	} else if (num_fingers == 1) {
+		synaptics_report_semi_mt_slot(dev, 0, true, a->x, a->y);
+		synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
+	} else {
+		synaptics_report_semi_mt_slot(dev, 0, false, 0, 0);
+		synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
+	}
+}
+
+static void synaptics_report_ext_buttons(struct psmouse *psmouse,
+					 const struct synaptics_hw_state *hw)
+{
+	struct input_dev *dev = psmouse->dev;
+	struct synaptics_data *priv = psmouse->private;
+	int ext_bits = (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1;
+	int i;
+
+	if (!SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap))
+		return;
+
+	/* Bug in FW 8.1 & 8.2, buttons are reported only when ExtBit is 1 */
+	if ((SYN_ID_FULL(priv->info.identity) == 0x801 ||
+	     SYN_ID_FULL(priv->info.identity) == 0x802) &&
+	    !((psmouse->packet[0] ^ psmouse->packet[3]) & 0x02))
+		return;
+
+	if (!SYN_CAP_EXT_BUTTONS_STICK(priv->info.ext_cap_10)) {
+		for (i = 0; i < ext_bits; i++) {
+			input_report_key(dev, BTN_0 + 2 * i,
+				hw->ext_buttons & BIT(i));
+			input_report_key(dev, BTN_1 + 2 * i,
+				hw->ext_buttons & BIT(i + ext_bits));
+		}
+		return;
+	}
+
+	/*
+	 * This generation of touchpads has the trackstick buttons
+	 * physically wired to the touchpad. Re-route them through
+	 * the pass-through interface.
+	 */
+	if (priv->pt_port) {
+		u8 pt_buttons;
+
+		/* The trackstick expects at most 3 buttons */
+		pt_buttons = SYN_EXT_BUTTON_STICK_L(hw->ext_buttons)      |
+			     SYN_EXT_BUTTON_STICK_R(hw->ext_buttons) << 1 |
+			     SYN_EXT_BUTTON_STICK_M(hw->ext_buttons) << 2;
+
+		serio_interrupt(priv->pt_port,
+				PSMOUSE_OOB_EXTRA_BTNS, SERIO_OOB_DATA);
+		serio_interrupt(priv->pt_port, pt_buttons, SERIO_OOB_DATA);
+	}
+}
+
+static void synaptics_report_buttons(struct psmouse *psmouse,
+				     const struct synaptics_hw_state *hw)
+{
+	struct input_dev *dev = psmouse->dev;
+	struct synaptics_data *priv = psmouse->private;
+
+	input_report_key(dev, BTN_LEFT, hw->left);
+	input_report_key(dev, BTN_RIGHT, hw->right);
+
+	if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities))
+		input_report_key(dev, BTN_MIDDLE, hw->middle);
+
+	if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) {
+		input_report_key(dev, BTN_FORWARD, hw->up);
+		input_report_key(dev, BTN_BACK, hw->down);
+	}
+
+	synaptics_report_ext_buttons(psmouse, hw);
+}
+
+static void synaptics_report_mt_data(struct psmouse *psmouse,
+				     const struct synaptics_hw_state *sgm,
+				     int num_fingers)
+{
+	struct input_dev *dev = psmouse->dev;
+	struct synaptics_data *priv = psmouse->private;
+	const struct synaptics_hw_state *hw[2] = { sgm, &priv->agm };
+	struct input_mt_pos pos[2];
+	int slot[2], nsemi, i;
+
+	nsemi = clamp_val(num_fingers, 0, 2);
+
+	for (i = 0; i < nsemi; i++) {
+		pos[i].x = hw[i]->x;
+		pos[i].y = synaptics_invert_y(hw[i]->y);
+	}
+
+	input_mt_assign_slots(dev, slot, pos, nsemi, DMAX * priv->info.x_res);
+
+	for (i = 0; i < nsemi; i++) {
+		input_mt_slot(dev, slot[i]);
+		input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
+		input_report_abs(dev, ABS_MT_POSITION_X, pos[i].x);
+		input_report_abs(dev, ABS_MT_POSITION_Y, pos[i].y);
+		input_report_abs(dev, ABS_MT_PRESSURE, hw[i]->z);
+	}
+
+	input_mt_drop_unused(dev);
+
+	/* Don't use active slot count to generate BTN_TOOL events. */
+	input_mt_report_pointer_emulation(dev, false);
+
+	/* Send the number of fingers reported by touchpad itself. */
+	input_mt_report_finger_count(dev, num_fingers);
+
+	synaptics_report_buttons(psmouse, sgm);
+
+	input_sync(dev);
+}
+
+static void synaptics_image_sensor_process(struct psmouse *psmouse,
+					   struct synaptics_hw_state *sgm)
+{
+	struct synaptics_data *priv = psmouse->private;
+	int num_fingers;
+
+	/*
+	 * Update mt_state using the new finger count and current mt_state.
+	 */
+	if (sgm->z == 0)
+		num_fingers = 0;
+	else if (sgm->w >= 4)
+		num_fingers = 1;
+	else if (sgm->w == 0)
+		num_fingers = 2;
+	else if (sgm->w == 1)
+		num_fingers = priv->agm_count ? priv->agm_count : 3;
+	else
+		num_fingers = 4;
+
+	/* Send resulting input events to user space */
+	synaptics_report_mt_data(psmouse, sgm, num_fingers);
+}
+
+static bool synaptics_has_multifinger(struct synaptics_data *priv)
+{
+	if (SYN_CAP_MULTIFINGER(priv->info.capabilities))
+		return true;
+
+	/* Advanced gesture mode also sends multi finger data */
+	return synaptics_has_agm(priv);
+}
+
+/*
+ *  called for each full received packet from the touchpad
+ */
+static void synaptics_process_packet(struct psmouse *psmouse)
+{
+	struct input_dev *dev = psmouse->dev;
+	struct synaptics_data *priv = psmouse->private;
+	struct synaptics_device_info *info = &priv->info;
+	struct synaptics_hw_state hw;
+	int num_fingers;
+	int finger_width;
+
+	if (synaptics_parse_hw_state(psmouse->packet, priv, &hw))
+		return;
+
+	if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) {
+		synaptics_image_sensor_process(psmouse, &hw);
+		return;
+	}
+
+	if (hw.scroll) {
+		priv->scroll += hw.scroll;
+
+		while (priv->scroll >= 4) {
+			input_report_key(dev, BTN_BACK, !hw.down);
+			input_sync(dev);
+			input_report_key(dev, BTN_BACK, hw.down);
+			input_sync(dev);
+			priv->scroll -= 4;
+		}
+		while (priv->scroll <= -4) {
+			input_report_key(dev, BTN_FORWARD, !hw.up);
+			input_sync(dev);
+			input_report_key(dev, BTN_FORWARD, hw.up);
+			input_sync(dev);
+			priv->scroll += 4;
+		}
+		return;
+	}
+
+	if (hw.z > 0 && hw.x > 1) {
+		num_fingers = 1;
+		finger_width = 5;
+		if (SYN_CAP_EXTENDED(info->capabilities)) {
+			switch (hw.w) {
+			case 0 ... 1:
+				if (synaptics_has_multifinger(priv))
+					num_fingers = hw.w + 2;
+				break;
+			case 2:
+				/*
+				 * SYN_MODEL_PEN(info->model_id): even if
+				 * the device supports pen, we treat it as
+				 * a single finger.
+				 */
+				break;
+			case 4 ... 15:
+				if (SYN_CAP_PALMDETECT(info->capabilities))
+					finger_width = hw.w;
+				break;
+			}
+		}
+	} else {
+		num_fingers = 0;
+		finger_width = 0;
+	}
+
+	if (cr48_profile_sensor) {
+		synaptics_report_mt_data(psmouse, &hw, num_fingers);
+		return;
+	}
+
+	if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c))
+		synaptics_report_semi_mt_data(dev, &hw, &priv->agm,
+					      num_fingers);
+
+	/* Post events
+	 * BTN_TOUCH has to be first as mousedev relies on it when doing
+	 * absolute -> relative conversion
+	 */
+	if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
+	if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
+
+	if (num_fingers > 0) {
+		input_report_abs(dev, ABS_X, hw.x);
+		input_report_abs(dev, ABS_Y, synaptics_invert_y(hw.y));
+	}
+	input_report_abs(dev, ABS_PRESSURE, hw.z);
+
+	if (SYN_CAP_PALMDETECT(info->capabilities))
+		input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
+
+	input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
+	if (synaptics_has_multifinger(priv)) {
+		input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
+		input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
+	}
+
+	synaptics_report_buttons(psmouse, &hw);
+
+	input_sync(dev);
+}
+
+static bool synaptics_validate_byte(struct psmouse *psmouse,
+				    int idx, enum synaptics_pkt_type pkt_type)
+{
+	static const u8 newabs_mask[]	  = { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
+	static const u8 newabs_rel_mask[] = { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
+	static const u8 newabs_rslt[]	  = { 0x80, 0x00, 0x00, 0xC0, 0x00 };
+	static const u8 oldabs_mask[]	  = { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
+	static const u8 oldabs_rslt[]	  = { 0xC0, 0x00, 0x00, 0x80, 0x00 };
+	const u8 *packet = psmouse->packet;
+
+	if (idx < 0 || idx > 4)
+		return false;
+
+	switch (pkt_type) {
+
+	case SYN_NEWABS:
+	case SYN_NEWABS_RELAXED:
+		return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
+
+	case SYN_NEWABS_STRICT:
+		return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
+
+	case SYN_OLDABS:
+		return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
+
+	default:
+		psmouse_err(psmouse, "unknown packet type %d\n", pkt_type);
+		return false;
+	}
+}
+
+static enum synaptics_pkt_type
+synaptics_detect_pkt_type(struct psmouse *psmouse)
+{
+	int i;
+
+	for (i = 0; i < 5; i++) {
+		if (!synaptics_validate_byte(psmouse, i, SYN_NEWABS_STRICT)) {
+			psmouse_info(psmouse, "using relaxed packet validation\n");
+			return SYN_NEWABS_RELAXED;
+		}
+	}
+
+	return SYN_NEWABS_STRICT;
+}
+
+static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
+{
+	struct synaptics_data *priv = psmouse->private;
+
+	if (psmouse->pktcnt >= 6) { /* Full packet received */
+		if (unlikely(priv->pkt_type == SYN_NEWABS))
+			priv->pkt_type = synaptics_detect_pkt_type(psmouse);
+
+		if (SYN_CAP_PASS_THROUGH(priv->info.capabilities) &&
+		    synaptics_is_pt_packet(psmouse->packet)) {
+			synaptics_pass_pt_packet(priv, psmouse->packet);
+		} else {
+			synaptics_process_packet(psmouse);
+		}
+
+		return PSMOUSE_FULL_PACKET;
+	}
+
+	return synaptics_validate_byte(psmouse, psmouse->pktcnt - 1, priv->pkt_type) ?
+		PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
+}
+
+/*****************************************************************************
+ *	Driver initialization/cleanup functions
+ ****************************************************************************/
+static void set_abs_position_params(struct input_dev *dev,
+				    struct synaptics_device_info *info,
+				    int x_code, int y_code)
+{
+	int x_min = info->x_min ?: XMIN_NOMINAL;
+	int x_max = info->x_max ?: XMAX_NOMINAL;
+	int y_min = info->y_min ?: YMIN_NOMINAL;
+	int y_max = info->y_max ?: YMAX_NOMINAL;
+	int fuzz = SYN_CAP_REDUCED_FILTERING(info->ext_cap_0c) ?
+			SYN_REDUCED_FILTER_FUZZ : 0;
+
+	input_set_abs_params(dev, x_code, x_min, x_max, fuzz, 0);
+	input_set_abs_params(dev, y_code, y_min, y_max, fuzz, 0);
+	input_abs_set_res(dev, x_code, info->x_res);
+	input_abs_set_res(dev, y_code, info->y_res);
+}
+
+static int set_input_params(struct psmouse *psmouse,
+			    struct synaptics_data *priv)
+{
+	struct input_dev *dev = psmouse->dev;
+	struct synaptics_device_info *info = &priv->info;
+	int i;
+	int error;
+
+	/* Reset default psmouse capabilities */
+	__clear_bit(EV_REL, dev->evbit);
+	bitmap_zero(dev->relbit, REL_CNT);
+	bitmap_zero(dev->keybit, KEY_CNT);
+
+	/* Things that apply to both modes */
+	__set_bit(INPUT_PROP_POINTER, dev->propbit);
+
+	input_set_capability(dev, EV_KEY, BTN_LEFT);
+
+	/* Clickpads report only left button */
+	if (!SYN_CAP_CLICKPAD(info->ext_cap_0c)) {
+		input_set_capability(dev, EV_KEY, BTN_RIGHT);
+		if (SYN_CAP_MIDDLE_BUTTON(info->capabilities))
+			input_set_capability(dev, EV_KEY, BTN_MIDDLE);
+	}
+
+	if (!priv->absolute_mode) {
+		/* Relative mode */
+		input_set_capability(dev, EV_REL, REL_X);
+		input_set_capability(dev, EV_REL, REL_Y);
+		return 0;
+	}
+
+	/* Absolute mode */
+	set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y);
+	input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
+
+	if (cr48_profile_sensor)
+		input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
+
+	if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) {
+		set_abs_position_params(dev, info,
+					ABS_MT_POSITION_X, ABS_MT_POSITION_Y);
+		/* Image sensors can report per-contact pressure */
+		input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
+
+		error = input_mt_init_slots(dev, 2,
+					    INPUT_MT_POINTER | INPUT_MT_TRACK);
+		if (error)
+			return error;
+
+		/* Image sensors can signal 4 and 5 finger clicks */
+		input_set_capability(dev, EV_KEY, BTN_TOOL_QUADTAP);
+		input_set_capability(dev, EV_KEY, BTN_TOOL_QUINTTAP);
+	} else if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c)) {
+		set_abs_position_params(dev, info,
+					ABS_MT_POSITION_X, ABS_MT_POSITION_Y);
+		/*
+		 * Profile sensor in CR-48 tracks contacts reasonably well,
+		 * other non-image sensors with AGM use semi-mt.
+		 */
+		error = input_mt_init_slots(dev, 2,
+					    INPUT_MT_POINTER |
+					     (cr48_profile_sensor ?
+					      INPUT_MT_TRACK :
+					      INPUT_MT_SEMI_MT));
+		if (error)
+			return error;
+
+		/*
+		 * For semi-mt devices we send ABS_X/Y ourselves instead of
+		 * input_mt_report_pointer_emulation. But
+		 * input_mt_init_slots() resets the fuzz to 0, leading to a
+		 * filtered ABS_MT_POSITION_X but an unfiltered ABS_X
+		 * position. Let's re-initialize ABS_X/Y here.
+		 */
+		if (!cr48_profile_sensor)
+			set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y);
+	}
+
+	if (SYN_CAP_PALMDETECT(info->capabilities))
+		input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
+
+	input_set_capability(dev, EV_KEY, BTN_TOUCH);
+	input_set_capability(dev, EV_KEY, BTN_TOOL_FINGER);
+
+	if (synaptics_has_multifinger(priv)) {
+		input_set_capability(dev, EV_KEY, BTN_TOOL_DOUBLETAP);
+		input_set_capability(dev, EV_KEY, BTN_TOOL_TRIPLETAP);
+	}
+
+	if (SYN_CAP_FOUR_BUTTON(info->capabilities) ||
+	    SYN_CAP_MIDDLE_BUTTON(info->capabilities)) {
+		input_set_capability(dev, EV_KEY, BTN_FORWARD);
+		input_set_capability(dev, EV_KEY, BTN_BACK);
+	}
+
+	if (!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10))
+		for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(info->ext_cap); i++)
+			input_set_capability(dev, EV_KEY, BTN_0 + i);
+
+	if (SYN_CAP_CLICKPAD(info->ext_cap_0c)) {
+		__set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
+		if (psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
+		    !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10))
+			__set_bit(INPUT_PROP_TOPBUTTONPAD, dev->propbit);
+	}
+
+	return 0;
+}
+
+static ssize_t synaptics_show_disable_gesture(struct psmouse *psmouse,
+					      void *data, char *buf)
+{
+	struct synaptics_data *priv = psmouse->private;
+
+	return sprintf(buf, "%c\n", priv->disable_gesture ? '1' : '0');
+}
+
+static ssize_t synaptics_set_disable_gesture(struct psmouse *psmouse,
+					     void *data, const char *buf,
+					     size_t len)
+{
+	struct synaptics_data *priv = psmouse->private;
+	unsigned int value;
+	int err;
+
+	err = kstrtouint(buf, 10, &value);
+	if (err)
+		return err;
+
+	if (value > 1)
+		return -EINVAL;
+
+	if (value == priv->disable_gesture)
+		return len;
+
+	priv->disable_gesture = value;
+	if (value)
+		priv->mode |= SYN_BIT_DISABLE_GESTURE;
+	else
+		priv->mode &= ~SYN_BIT_DISABLE_GESTURE;
+
+	if (synaptics_mode_cmd(psmouse, priv->mode))
+		return -EIO;
+
+	return len;
+}
+
+PSMOUSE_DEFINE_ATTR(disable_gesture, S_IWUSR | S_IRUGO, NULL,
+		    synaptics_show_disable_gesture,
+		    synaptics_set_disable_gesture);
+
+static void synaptics_disconnect(struct psmouse *psmouse)
+{
+	struct synaptics_data *priv = psmouse->private;
+
+	/*
+	 * We might have left a breadcrumb when trying to
+	 * set up SMbus companion.
+	 */
+	psmouse_smbus_cleanup(psmouse);
+
+	if (!priv->absolute_mode &&
+			SYN_ID_DISGEST_SUPPORTED(priv->info.identity))
+		device_remove_file(&psmouse->ps2dev.serio->dev,
+				   &psmouse_attr_disable_gesture.dattr);
+
+	synaptics_reset(psmouse);
+	kfree(priv);
+	psmouse->private = NULL;
+}
+
+static int synaptics_reconnect(struct psmouse *psmouse)
+{
+	struct synaptics_data *priv = psmouse->private;
+	struct synaptics_device_info info;
+	u8 param[2];
+	int retry = 0;
+	int error;
+
+	do {
+		psmouse_reset(psmouse);
+		if (retry) {
+			/*
+			 * On some boxes, right after resuming, the touchpad
+			 * needs some time to finish initializing (I assume
+			 * it needs time to calibrate) and start responding
+			 * to Synaptics-specific queries, so let's wait a
+			 * bit.
+			 */
+			ssleep(1);
+		}
+		ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETID);
+		error = synaptics_detect(psmouse, 0);
+	} while (error && ++retry < 3);
+
+	if (error)
+		return error;
+
+	if (retry > 1)
+		psmouse_dbg(psmouse, "reconnected after %d tries\n", retry);
+
+	error = synaptics_query_hardware(psmouse, &info);
+	if (error) {
+		psmouse_err(psmouse, "Unable to query device.\n");
+		return error;
+	}
+
+	error = synaptics_set_mode(psmouse);
+	if (error) {
+		psmouse_err(psmouse, "Unable to initialize device.\n");
+		return error;
+	}
+
+	if (info.identity != priv->info.identity ||
+	    info.model_id != priv->info.model_id ||
+	    info.capabilities != priv->info.capabilities ||
+	    info.ext_cap != priv->info.ext_cap) {
+		psmouse_err(psmouse,
+			    "hardware appears to be different: id(%u-%u), model(%u-%u), caps(%x-%x), ext(%x-%x).\n",
+			    priv->info.identity, info.identity,
+			    priv->info.model_id, info.model_id,
+			    priv->info.capabilities, info.capabilities,
+			    priv->info.ext_cap, info.ext_cap);
+		return -ENXIO;
+	}
+
+	return 0;
+}
+
+static bool impaired_toshiba_kbc;
+
+static const struct dmi_system_id toshiba_dmi_table[] __initconst = {
+#if defined(CONFIG_DMI) && defined(CONFIG_X86)
+	{
+		/* Toshiba Satellite */
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
+		},
+	},
+	{
+		/* Toshiba Dynabook */
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"),
+		},
+	},
+	{
+		/* Toshiba Portege M300 */
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"),
+		},
+
+	},
+	{
+		/* Toshiba Portege M300 */
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"),
+			DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"),
+		},
+
+	},
+#endif
+	{ }
+};
+
+static bool broken_olpc_ec;
+
+static const struct dmi_system_id olpc_dmi_table[] __initconst = {
+#if defined(CONFIG_DMI) && defined(CONFIG_OLPC)
+	{
+		/* OLPC XO-1 or XO-1.5 */
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "OLPC"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "XO"),
+		},
+	},
+#endif
+	{ }
+};
+
+static const struct dmi_system_id __initconst cr48_dmi_table[] = {
+#if defined(CONFIG_DMI) && defined(CONFIG_X86)
+	{
+		/* Cr-48 Chromebook (Codename Mario) */
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "IEC"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Mario"),
+		},
+	},
+#endif
+	{ }
+};
+
+void __init synaptics_module_init(void)
+{
+	impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table);
+	broken_olpc_ec = dmi_check_system(olpc_dmi_table);
+	cr48_profile_sensor = dmi_check_system(cr48_dmi_table);
+}
+
+static int synaptics_init_ps2(struct psmouse *psmouse,
+			      struct synaptics_device_info *info,
+			      bool absolute_mode)
+{
+	struct synaptics_data *priv;
+	int err;
+
+	synaptics_apply_quirks(psmouse, info);
+
+	psmouse->private = priv = kzalloc_obj(*priv);
+	if (!priv)
+		return -ENOMEM;
+
+	priv->info = *info;
+	priv->absolute_mode = absolute_mode;
+	if (SYN_ID_DISGEST_SUPPORTED(info->identity))
+		priv->disable_gesture = true;
+
+	/*
+	 * Unfortunately ForcePad capability is not exported over PS/2,
+	 * so we have to resort to checking PNP IDs.
+	 */
+	priv->is_forcepad = psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids);
+
+	err = synaptics_set_mode(psmouse);
+	if (err) {
+		psmouse_err(psmouse, "Unable to initialize device.\n");
+		goto init_fail;
+	}
+
+	priv->pkt_type = SYN_MODEL_NEWABS(info->model_id) ?
+					SYN_NEWABS : SYN_OLDABS;
+
+	psmouse_info(psmouse,
+		     "Touchpad model: %lu, fw: %lu.%lu, id: %#x, caps: %#x/%#x/%#x/%#x, board id: %u, fw id: %u\n",
+		     SYN_ID_MODEL(info->identity),
+		     SYN_ID_MAJOR(info->identity), SYN_ID_MINOR(info->identity),
+		     info->model_id,
+		     info->capabilities, info->ext_cap, info->ext_cap_0c,
+		     info->ext_cap_10, info->board_id, info->firmware_id);
+
+	err = set_input_params(psmouse, priv);
+	if (err) {
+		psmouse_err(psmouse,
+			    "failed to set up capabilities: %d\n", err);
+		goto init_fail;
+	}
+
+	/*
+	 * Encode touchpad model so that it can be used to set
+	 * input device->id.version and be visible to userspace.
+	 * Because version is __u16 we have to drop something.
+	 * Hardware info bits seem to be good candidates as they
+	 * are documented to be for Synaptics corp. internal use.
+	 */
+	psmouse->model = ((info->model_id & 0x00ff0000) >> 8) |
+			  (info->model_id & 0x000000ff);
+
+	if (absolute_mode) {
+		psmouse->protocol_handler = synaptics_process_byte;
+		psmouse->pktsize = 6;
+	} else {
+		/* Relative mode follows standard PS/2 mouse protocol */
+		psmouse->protocol_handler = psmouse_process_byte;
+		psmouse->pktsize = 3;
+	}
+
+	psmouse->set_rate = synaptics_set_rate;
+	psmouse->disconnect = synaptics_disconnect;
+	psmouse->reconnect = synaptics_reconnect;
+	psmouse->fast_reconnect = NULL;
+	psmouse->cleanup = synaptics_reset;
+	/* Synaptics can usually stay in sync without extra help */
+	psmouse->resync_time = 0;
+
+	if (SYN_CAP_PASS_THROUGH(info->capabilities))
+		synaptics_pt_create(psmouse);
+
+	/*
+	 * Toshiba's KBC seems to have trouble handling data from
+	 * Synaptics at full rate.  Switch to a lower rate (roughly
+	 * the same rate as a standard PS/2 mouse).
+	 */
+	if (psmouse->rate >= 80 && impaired_toshiba_kbc) {
+		psmouse_info(psmouse,
+			     "Toshiba %s detected, limiting rate to 40pps.\n",
+			     dmi_get_system_info(DMI_PRODUCT_NAME));
+		psmouse->rate = 40;
+	}
+
+	if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(info->identity)) {
+		err = device_create_file(&psmouse->ps2dev.serio->dev,
+					 &psmouse_attr_disable_gesture.dattr);
+		if (err) {
+			psmouse_err(psmouse,
+				    "Failed to create disable_gesture attribute (%d)",
+				    err);
+			goto init_fail;
+		}
+	}
+
+	return 0;
+
+ init_fail:
+	kfree(priv);
+	return err;
+}
+
+static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode)
+{
+	struct synaptics_device_info info;
+	int error;
+
+	psmouse_reset(psmouse);
+
+	error = synaptics_query_hardware(psmouse, &info);
+	if (error) {
+		psmouse_err(psmouse, "Unable to query device: %d\n", error);
+		return error;
+	}
+
+	return synaptics_init_ps2(psmouse, &info, absolute_mode);
+}
+
+int synaptics_init_absolute(struct psmouse *psmouse)
+{
+	return __synaptics_init(psmouse, true);
+}
+
+int synaptics_init_relative(struct psmouse *psmouse)
+{
+	return __synaptics_init(psmouse, false);
+}
+
+static int synaptics_setup_ps2(struct psmouse *psmouse,
+			       struct synaptics_device_info *info)
+{
+	bool absolute_mode = true;
+	int error;
+
+	/*
+	 * The OLPC XO has issues with Synaptics' absolute mode; the constant
+	 * packet spew overloads the EC such that key presses on the keyboard
+	 * are missed.  Given that, don't even attempt to use Absolute mode.
+	 * Relative mode seems to work just fine.
+	 */
+	if (broken_olpc_ec) {
+		psmouse_info(psmouse,
+			     "OLPC XO detected, forcing relative protocol.\n");
+		absolute_mode = false;
+	}
+
+	error = synaptics_init_ps2(psmouse, info, absolute_mode);
+	if (error)
+		return error;
+
+	return absolute_mode ? PSMOUSE_SYNAPTICS : PSMOUSE_SYNAPTICS_RELATIVE;
+}
+
+#else /* CONFIG_MOUSE_PS2_SYNAPTICS */
+
+void __init synaptics_module_init(void)
+{
+}
+
+static int __maybe_unused
+synaptics_setup_ps2(struct psmouse *psmouse,
+		    struct synaptics_device_info *info)
+{
+	return -ENOSYS;
+}
+
+#endif /* CONFIG_MOUSE_PS2_SYNAPTICS */
+
+#ifdef CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS
+
+/*
+ * The newest Synaptics device can use a secondary bus (called InterTouch) which
+ * provides a better bandwidth and allow a better control of the touchpads.
+ * This is used to decide if we need to use this bus or not.
+ */
+enum {
+	SYNAPTICS_INTERTOUCH_NOT_SET = -1,
+	SYNAPTICS_INTERTOUCH_OFF,
+	SYNAPTICS_INTERTOUCH_ON,
+};
+
+static int synaptics_intertouch = IS_ENABLED(CONFIG_RMI4_SMB) ?
+		SYNAPTICS_INTERTOUCH_NOT_SET : SYNAPTICS_INTERTOUCH_OFF;
+module_param_named(synaptics_intertouch, synaptics_intertouch, int, 0644);
+MODULE_PARM_DESC(synaptics_intertouch, "Use a secondary bus for the Synaptics device.");
+
+static int synaptics_create_intertouch(struct psmouse *psmouse,
+				       struct synaptics_device_info *info,
+				       bool leave_breadcrumbs)
+{
+	bool topbuttonpad =
+		psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
+		!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10);
+	const struct rmi_device_platform_data pdata = {
+		.reset_delay_ms = 30,
+		.sensor_pdata = {
+			.sensor_type = rmi_sensor_touchpad,
+			.axis_align.flip_y = true,
+			.kernel_tracking = false,
+			.topbuttonpad = topbuttonpad,
+		},
+		.gpio_data = {
+			.buttonpad = SYN_CAP_CLICKPAD(info->ext_cap_0c),
+			.trackstick_buttons =
+				!!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10),
+		},
+	};
+	const struct i2c_board_info intertouch_board = {
+		I2C_BOARD_INFO("rmi4_smbus", 0x2c),
+		.flags = I2C_CLIENT_HOST_NOTIFY,
+	};
+
+	return psmouse_smbus_init(psmouse, &intertouch_board,
+				  &pdata, sizeof(pdata), true,
+				  leave_breadcrumbs);
+}
+
+/*
+ * synaptics_setup_intertouch - called once the PS/2 devices are enumerated
+ * and decides to instantiate a SMBus InterTouch device.
+ */
+static int synaptics_setup_intertouch(struct psmouse *psmouse,
+				      struct synaptics_device_info *info,
+				      bool leave_breadcrumbs)
+{
+	int error;
+
+	if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_OFF)
+		return -ENXIO;
+
+	if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_NOT_SET) {
+		if (!psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
+		    !psmouse_matches_pnp_id(psmouse, smbus_pnp_ids)) {
+
+			if (!psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids))
+				psmouse_info(psmouse,
+					     "Your touchpad (%s) says it can support a different bus. "
+					     "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",
+					     psmouse->ps2dev.serio->firmware_id);
+
+			return -ENXIO;
+		}
+	}
+
+	psmouse_info(psmouse, "Trying to set up SMBus access\n");
+
+	error = synaptics_create_intertouch(psmouse, info, leave_breadcrumbs);
+	if (error) {
+		if (error == -EAGAIN)
+			psmouse_info(psmouse, "SMbus companion is not ready yet\n");
+		else
+			psmouse_err(psmouse, "unable to create intertouch device\n");
+
+		return error;
+	}
+
+	return 0;
+}
+
+int synaptics_init_smbus(struct psmouse *psmouse)
+{
+	struct synaptics_device_info info;
+	int error;
+
+	psmouse_reset(psmouse);
+
+	error = synaptics_query_hardware(psmouse, &info);
+	if (error) {
+		psmouse_err(psmouse, "Unable to query device: %d\n", error);
+		return error;
+	}
+
+	if (!SYN_CAP_INTERTOUCH(info.ext_cap_0c))
+		return -ENXIO;
+
+	return synaptics_create_intertouch(psmouse, &info, false);
+}
+
+#else /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
+
+static int __maybe_unused
+synaptics_setup_intertouch(struct psmouse *psmouse,
+			   struct synaptics_device_info *info,
+			   bool leave_breadcrumbs)
+{
+	return -ENOSYS;
+}
+
+int synaptics_init_smbus(struct psmouse *psmouse)
+{
+	return -ENOSYS;
+}
+
+#endif /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
+
+#if defined(CONFIG_MOUSE_PS2_SYNAPTICS) || \
+    defined(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)
+
+int synaptics_init(struct psmouse *psmouse)
+{
+	struct synaptics_device_info info;
+	int error;
+	int retval;
+
+	psmouse_reset(psmouse);
+
+	error = synaptics_query_hardware(psmouse, &info);
+	if (error) {
+		psmouse_err(psmouse, "Unable to query device: %d\n", error);
+		return error;
+	}
+
+	if (SYN_CAP_INTERTOUCH(info.ext_cap_0c)) {
+		if ((!IS_ENABLED(CONFIG_RMI4_SMB) ||
+		     !IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)) &&
+		    /* Forcepads need F21, which is not ready */
+		    !psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids)) {
+			psmouse_warn(psmouse,
+				     "The touchpad can support a better bus than the too old PS/2 protocol. "
+				     "Make sure MOUSE_PS2_SYNAPTICS_SMBUS and RMI4_SMB are enabled to get a better touchpad experience.\n");
+		}
+
+		error = synaptics_setup_intertouch(psmouse, &info, true);
+		if (!error)
+			return PSMOUSE_SYNAPTICS_SMBUS;
+	}
+
+	retval = synaptics_setup_ps2(psmouse, &info);
+	if (retval < 0) {
+		/*
+		 * Not using any flavor of Synaptics support, so clean up
+		 * SMbus breadcrumbs, if any.
+		 */
+		psmouse_smbus_cleanup(psmouse);
+	}
+
+	return retval;
+}
+
+#else /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
+
+int synaptics_init(struct psmouse *psmouse)
+{
+	return -ENOSYS;
+}
+
+#endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */