Release 4.11 drivers/input/mouse/synaptics.c

/*
 * 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)
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 *
 * 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/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, unsigned char mode)
{
	unsigned char param[1];

	if (psmouse_sliced_command(psmouse, mode))
		return -1;
	param[0] = SYN_PS_SET_MODE2;
	if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_SETRATE))
		return -1;
	return 0;
}

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17
26.98%
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Dmitry Torokhov
5
7.94%
2
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int synaptics_detect(struct psmouse *psmouse, bool set_properties)
{
	struct ps2dev *ps2dev = &psmouse->ps2dev;
	unsigned char param[4];

	param[0] = 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;
}

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100
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15
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Dmitry Torokhov
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void synaptics_reset(struct psmouse *psmouse)
{
	/* reset touchpad back to relative mode, gestures enabled */
	synaptics_mode_cmd(psmouse, 0);
}

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#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 {
		

unsigned long int min, max;
	} 
board_id;
	



int 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
	},
	{ }
};

/* 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",
	"LEN0049",
	"LEN2000", /* S540 */
	"LEN2001", /* Edge E431 */
	"LEN2002", /* Edge E531 */
	"LEN2003",
	"LEN2004", /* L440 */
	"LEN2005",
	"LEN2006", /* Edge E440/E540 */
	"LEN2007",
	"LEN2008",
	"LEN2009",
	"LEN200A",
	"LEN200B",
	NULL
};

/* This list has been kindly provided by Synaptics. */

static const char * const forcepad_pnp_ids[] = {
	"SYN300D",
	"SYN3014",
	NULL
};

/*****************************************************************************
 *      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;
}

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/*
 * Send a command to the synpatics touchpad by special commands
 */


static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c, unsigned char *param)
{
	if (psmouse_sliced_command(psmouse, c))
		return -1;
	if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO))
		return -1;
	return 0;
}

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Peter Osterlund
28
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Andres Salomon
21
38.89%
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Dmitry Torokhov
5
9.26%
2
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54
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/*
 * Read the model-id bytes from the touchpad
 * see also SYN_MODEL_* macros
 */


static int synaptics_model_id(struct psmouse *psmouse)
{
	struct synaptics_data *priv = psmouse->private;
	unsigned char mi[3];

	if (synaptics_send_cmd(psmouse, SYN_QUE_MODEL, mi))
		return -1;
	priv->model_id = (mi[0]<<16) | (mi[1]<<8) | mi[2];
	return 0;
}

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static int synaptics_more_extended_queries(struct psmouse *psmouse)
{
	struct synaptics_data *priv = psmouse->private;
	unsigned char buf[3];

	if (synaptics_send_cmd(psmouse, SYN_QUE_MEXT_CAPAB_10, buf))
		return -1;

	priv->ext_cap_10 = (buf[0]<<16) | (buf[1]<<8) | buf[2];

	return 0;
}

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/*
 * 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_data *priv = psmouse->private;
	unsigned char bid[3];

	/* firmwares prior 7.5 have no board_id encoded */
	if (SYN_ID_FULL(priv->identity) < 0x705)
		return 0;

	if (synaptics_send_cmd(psmouse, SYN_QUE_MODES, bid))
		return -1;
	priv->board_id = ((bid[0] & 0xfc) << 6) | bid[1];

	if (SYN_MEXT_CAP_BIT(bid[0]))
		return synaptics_more_extended_queries(psmouse);

	return 0;
}

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/*
 * Read the firmware id from the touchpad
 */


static int synaptics_firmware_id(struct psmouse *psmouse)
{
	struct synaptics_data *priv = psmouse->private;
	unsigned char fwid[3];

	if (synaptics_send_cmd(psmouse, SYN_QUE_FIRMWARE_ID, fwid))
		return -1;
	priv->firmware_id = (fwid[0] << 16) | (fwid[1] << 8) | fwid[2];
	return 0;
}

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/*
 * Read the capability-bits from the touchpad
 * see also the SYN_CAP_* macros
 */


static int synaptics_capability(struct psmouse *psmouse)
{
	struct synaptics_data *priv = psmouse->private;
	unsigned char cap[3];

	if (synaptics_send_cmd(psmouse, SYN_QUE_CAPABILITIES, cap))
		return -1;
	priv->capabilities = (cap[0] << 16) | (cap[1] << 8) | cap[2];
	priv->ext_cap = priv->ext_cap_0c = 0;

	/*
         * Older firmwares had submodel ID fixed to 0x47
         */
	if (SYN_ID_FULL(priv->identity) < 0x705 &&
	    SYN_CAP_SUBMODEL_ID(priv->capabilities) != 0x47) {
		return -1;
	}

	/*
         * Unless capExtended is set the rest of the flags should be ignored
         */
	if (!SYN_CAP_EXTENDED(priv->capabilities))
		priv->capabilities = 0;

	if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 1) {
		if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB, cap)) {
			psmouse_warn(psmouse,
				     "device claims to have extended capabilities, but I'm not able to read them.\n");
		} else {
			priv->ext_cap = (cap[0] << 16) | (cap[1] << 8) | cap[2];

			/*
                         * if nExtBtn is greater than 8 it should be considered
                         * invalid and treated as 0
                         */
			if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) > 8)
				priv->ext_cap &= 0xff0fff;
		}
	}

	if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 4) {
		if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB_0C, cap)) {
			psmouse_warn(psmouse,
				     "device claims to have extended capability 0x0c, but I'm not able to read it.\n");
		} else {
			priv->ext_cap_0c = (cap[0] << 16) | (cap[1] << 8) | cap[2];
		}
	}

	return 0;
}

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123
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84
31.11%
4
57.14%
Takashi Iwai
63
23.33%
1
14.29%
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270
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7
100.00%

/*
 * Identify Touchpad
 * See also the SYN_ID_* macros
 */


static int synaptics_identify(struct psmouse *psmouse)
{
	struct synaptics_data *priv = psmouse->private;
	unsigned char id[3];

	if (synaptics_send_cmd(psmouse, SYN_QUE_IDENTIFY, id))
		return -1;
	priv->identity = (id[0]<<16) | (id[1]<<8) | id[2];
	if (SYN_ID_IS_SYNAPTICS(priv->identity))
		return 0;
	return -1;
}

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15
17.65%
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85
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2
100.00%

/*
 * 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_data *priv = psmouse->private;
	unsigned char resp[3];

	if (SYN_ID_MAJOR(priv->identity) < 4)
		return 0;

	if (synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, resp) == 0) {
		if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) {
			priv->x_res = resp[0]; /* x resolution in units/mm */
			priv->y_res = resp[2]; /* y resolution in units/mm */
		}
	}

	if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 5 &&
	    SYN_CAP_MAX_DIMENSIONS(priv->ext_cap_0c)) {
		if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MAX_COORDS, resp)) {
			psmouse_warn(psmouse,
				     "device claims to have max coordinates query, but I'm not able to read it.\n");
		} else {
			priv->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
			priv->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
			psmouse_info(psmouse,
				     "queried max coordinates: x [..%d], y [..%d]\n",
				     priv->x_max, priv->y_max);
		}
	}

	if (SYN_CAP_MIN_DIMENSIONS(priv->ext_cap_0c) &&
	    (SYN_EXT_CAP_REQUESTS(priv->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(priv->identity) == 0x801)) {
		if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MIN_COORDS, resp)) {
			psmouse_warn(psmouse,
				     "device claims to have min coordinates query, but I'm not able to read it.\n");
		} else {
			priv->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
			priv->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
			psmouse_info(psmouse,
				     "queried min coordinates: x [%d..], y [%d..]\n",
				     priv->x_min, priv->y_min);
		}
	}

	return 0;
}

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Dmitry Torokhov
192
56.80%
3
42.86%
Benjamin Tissoires
76
22.49%
1
14.29%
Daniel Martin
45
13.31%
2
28.57%
Tero Saarni
25
7.40%
1
14.29%
Total
338
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7
100.00%

/*
 * Apply quirk(s) if the hardware matches
 */



static void synaptics_apply_quirks(struct psmouse *psmouse)
{
	struct synaptics_data *priv = psmouse->private;
	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 &&
		    priv->board_id < min_max_pnpid_table[i].board_id.min)
			continue;

		if (min_max_pnpid_table[i].board_id.max != ANY_BOARD_ID &&
		    priv->board_id > min_max_pnpid_table[i].board_id.max)
			continue;

		priv->x_min = min_max_pnpid_table[i].x_min;
		priv->x_max = min_max_pnpid_table[i].x_max;
		priv->y_min = min_max_pnpid_table[i].y_min;
		priv->y_max = min_max_pnpid_table[i].y_max;
		psmouse_info(psmouse,
			     "quirked min/max coordinates: x [%d..%d], y [%d..%d]\n",
			     priv->x_min, priv->x_max,
			     priv->y_min, priv->y_max);
		break;
	}
}

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static int synaptics_query_hardware(struct psmouse *psmouse)
{
	if (synaptics_identify(psmouse))
		return -1;
	if (synaptics_model_id(psmouse))
		return -1;
	if (synaptics_firmware_id(psmouse))
		return -1;
	if (synaptics_query_modes(psmouse))
		return -1;
	if (synaptics_capability(psmouse))
		return -1;
	if (synaptics_resolution(psmouse))
		return -1;

	synaptics_apply_quirks(psmouse);

	return 0;
}

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14.29%
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21
24.71%
1
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Tero Saarni
11
12.94%
1
14.29%
Dmitry Torokhov
5
5.88%
2
28.57%
Daniel Martin
5
5.88%
1
14.29%
Benjamin Tissoires
1
1.18%
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85
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static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse)
{
	static unsigned char param = 0xc8;
	struct synaptics_data *priv = psmouse->private;

	if (!(SYN_CAP_ADV_GESTURE(priv->ext_cap_0c) ||
	      SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)))
		return 0;

	if (psmouse_sliced_command(psmouse, SYN_QUE_MODEL))
		return -1;

	if (ps2_command(&psmouse->ps2dev, &param, PSMOUSE_CMD_SETRATE))
		return -1;

	/* Advanced gesture mode also sends multi finger data */
	priv->capabilities |= BIT(1);

	return 0;
}

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static int synaptics_set_mode(struct psmouse *psmouse)
{
	struct synaptics_data *priv = psmouse->private;

	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->capabilities))
		priv->mode |= SYN_BIT_W_MODE;

	if (synaptics_mode_cmd(psmouse, priv->mode))
		return -1;

	if (priv->absolute_mode &&
	    synaptics_set_advanced_gesture_mode(psmouse)) {
		psmouse_err(psmouse, "Advanced gesture mode init failed.\n");
		return -1;
	}

	return 0;
}

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37.19%
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Peter Osterlund
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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);
}

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/*****************************************************************************
 *      Synaptics pass-through PS/2 port support
 ****************************************************************************/


static int synaptics_pt_write(struct serio *serio, unsigned char c)
{
	struct psmouse *parent = serio_get_drvdata(serio->parent);
	char rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */

	if (psmouse_sliced_command(parent, c))
		return -1;
	if (ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE))
		return -1;
	return 0;
}

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static int synaptics_pt_start(struct serio *serio)
{
	struct psmouse *parent = serio_get_drvdata(serio->parent);
	struct synaptics_data *priv = parent->private;

	serio_pause_rx(parent->ps2dev.serio);
	priv->pt_port = serio;
	serio_continue_rx(parent->ps2dev.serio);

	return 0;
}

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Dmitry Torokhov
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static void synaptics_pt_stop(struct serio *serio)
{
	struct psmouse *parent = serio_get_drvdata(serio->parent);
	struct synaptics_data *priv = parent->private;

	serio_pause_rx(parent->ps2dev.serio);
	priv->pt_port = NULL;
	serio_continue_rx(parent->ps2dev.serio);
}

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Dmitry Torokhov
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static int synaptics_is_pt_packet(unsigned char *buf)
{
	return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
}

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Peter Osterlund
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static void synaptics_pass_pt_packet(struct serio *ptport,
				     unsigned char *packet)
{
	struct psmouse *child = serio_get_drvdata(ptport);

	if (child && child->state == PSMOUSE_ACTIVATED) {
		serio_interrupt(ptport, packet[1], 0);
		serio_interrupt(ptport, packet[4], 0);
		serio_interrupt(ptport, packet[5], 0);
		if (child->pktsize == 4)
			serio_interrupt(ptport, packet[2], 0);
	} else {
		serio_interrupt(