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NetBSD/sys/dev/pckbport/synaptics.c

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/* $NetBSD: synaptics.c,v 1.32 2014/05/23 01:11:29 christos Exp $ */
/*
* Copyright (c) 2005, Steve C. Woodford
* Copyright (c) 2004, Ales Krenek
* Copyright (c) 2004, Kentaro A. Kurahone
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
* * Neither the name of the authors nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
*/
/*
* TODO:
* - Make the sysctl values per-instance instead of global.
* - Consider setting initial scaling factors at runtime according
* to the values returned by the 'Read Resolutions' command.
* - Support the serial protocol (we only support PS/2 for now)
* - Support auto-repeat for up/down button Z-axis emulation.
* - Maybe add some more gestures (can we use Palm support somehow?)
*/
#include "opt_pms.h"
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: synaptics.c,v 1.32 2014/05/23 01:11:29 christos Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/ioctl.h>
#include <sys/sysctl.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/bus.h>
#include <dev/pckbport/pckbportvar.h>
#include <dev/pckbport/synapticsreg.h>
#include <dev/pckbport/synapticsvar.h>
#include <dev/pckbport/pmsreg.h>
#include <dev/pckbport/pmsvar.h>
#include <dev/wscons/wsconsio.h>
#include <dev/wscons/wsmousevar.h>
/*
* Absolute-mode packets are decoded and passed around using
* the following structure.
*/
struct synaptics_packet {
signed short sp_x; /* Unscaled absolute X/Y coordinates */
signed short sp_y;
u_char sp_z; /* Z (pressure) */
u_char sp_w; /* W (contact patch width) */
char sp_left; /* Left mouse button status */
char sp_right; /* Right mouse button status */
char sp_middle; /* Middle button status (possibly emulated) */
char sp_up; /* Up button status */
char sp_down; /* Down button status */
};
static void pms_synaptics_input(void *, int);
static void pms_synaptics_process_packet(struct pms_softc *,
struct synaptics_packet *);
static void pms_sysctl_synaptics(struct sysctllog **);
static int pms_sysctl_synaptics_verify(SYSCTLFN_ARGS);
/* Controlled by sysctl. */
static int synaptics_up_down_emul = 2;
static int synaptics_up_down_motion_delta = 1;
static int synaptics_gesture_move = 200;
static int synaptics_gesture_length = 20;
static int synaptics_edge_left = SYNAPTICS_EDGE_LEFT;
static int synaptics_edge_right = SYNAPTICS_EDGE_RIGHT;
static int synaptics_edge_top = SYNAPTICS_EDGE_TOP;
static int synaptics_edge_bottom = SYNAPTICS_EDGE_BOTTOM;
static int synaptics_edge_motion_delta = 32;
static u_int synaptics_finger_high = SYNAPTICS_FINGER_LIGHT + 5;
static u_int synaptics_finger_low = SYNAPTICS_FINGER_LIGHT - 10;
static int synaptics_two_fingers_emul = 0;
static int synaptics_scale_x = 16;
static int synaptics_scale_y = 16;
static int synaptics_max_speed_x = 32;
static int synaptics_max_speed_y = 32;
static int synaptics_movement_threshold = 4;
/* Sysctl nodes. */
static int synaptics_up_down_emul_nodenum;
static int synaptics_up_down_motion_delta_nodenum;
static int synaptics_gesture_move_nodenum;
static int synaptics_gesture_length_nodenum;
static int synaptics_edge_left_nodenum;
static int synaptics_edge_right_nodenum;
static int synaptics_edge_top_nodenum;
static int synaptics_edge_bottom_nodenum;
static int synaptics_edge_motion_delta_nodenum;
static int synaptics_finger_high_nodenum;
static int synaptics_finger_low_nodenum;
static int synaptics_two_fingers_emul_nodenum;
static int synaptics_scale_x_nodenum;
static int synaptics_scale_y_nodenum;
static int synaptics_max_speed_x_nodenum;
static int synaptics_max_speed_y_nodenum;
static int synaptics_movement_threshold_nodenum;
static void
pms_synaptics_probe_extended(struct pms_softc *psc)
{
struct synaptics_softc *sc = &psc->u.synaptics;
u_char cmd[1], resp[3];
int res;
aprint_debug_dev(psc->sc_dev,
"synaptics_probe: Capabilities 0x%04x.\n", sc->caps);
if (sc->caps & SYNAPTICS_CAP_PASSTHROUGH)
sc->flags |= SYN_FLAG_HAS_PASSTHROUGH;
if (sc->caps & SYNAPTICS_CAP_PALMDETECT)
sc->flags |= SYN_FLAG_HAS_PALM_DETECT;
if (sc->caps & SYNAPTICS_CAP_MULTIDETECT)
sc->flags |= SYN_FLAG_HAS_MULTI_FINGER;
if (sc->caps & SYNAPTICS_CAP_MULTIFINGERREPORT)
sc->flags |= SYN_FLAG_HAS_MULTI_FINGER_REPORT;
/* Ask about extra buttons to detect up/down. */
if (((sc->caps & SYNAPTICS_CAP_EXTNUM) + 0x08)
>= SYNAPTICS_EXTENDED_QUERY)
{
res = pms_sliced_command(psc->sc_kbctag,
psc->sc_kbcslot, SYNAPTICS_EXTENDED_QUERY);
cmd[0] = PMS_SEND_DEV_STATUS;
res |= pckbport_poll_cmd(psc->sc_kbctag,
psc->sc_kbcslot, cmd, 1, 3, resp, 0);
if (res == 0) {
int buttons = (resp[1] >> 4);
aprint_debug_dev(psc->sc_dev,
"%s: Extended Buttons: %d.\n", __func__, buttons);
aprint_debug_dev(psc->sc_dev, "%s: Extended "
"Capabilities: 0x%02x 0x%02x 0x%02x.\n", __func__,
resp[0], resp[1], resp[2]);
if (buttons >= 2) {
/* Yes. */
sc->flags |= SYN_FLAG_HAS_UP_DOWN_BUTTONS;
}
if (resp[0] & 0x1) {
/* Vertical scroll area */
sc->flags |= SYN_FLAG_HAS_VERTICAL_SCROLL;
}
if (resp[0] & 0x2) {
/* Horizontal scroll area */
sc->flags |= SYN_FLAG_HAS_HORIZONTAL_SCROLL;
}
if (resp[0] & 0x4) {
/* Extended W-Mode */
sc->flags |= SYN_FLAG_HAS_EXTENDED_WMODE;
}
}
}
/* Ask about click pad */
if (((sc->caps & SYNAPTICS_CAP_EXTNUM) + 0x08) >=
SYNAPTICS_CONTINUED_CAPABILITIES)
{
res = pms_sliced_command(psc->sc_kbctag,
psc->sc_kbcslot, SYNAPTICS_CONTINUED_CAPABILITIES);
cmd[0] = PMS_SEND_DEV_STATUS;
res |= pckbport_poll_cmd(psc->sc_kbctag,
psc->sc_kbcslot, cmd, 1, 3, resp, 0);
if (res == 0) {
u_char clickpad_type = (resp[1] & 0x1);
clickpad_type |= ((resp[0] >> 4) & 0x1);
aprint_debug_dev(psc->sc_dev, "%s: Continued "
"Capabilities 0x%02x 0x%02x 0x%02x.\n", __func__,
resp[0], resp[1], resp[2]);
switch (clickpad_type) {
case 1:
sc->flags |= SYN_FLAG_HAS_ONE_BUTTON_CLICKPAD;
break;
case 2:
sc->flags |= SYN_FLAG_HAS_TWO_BUTTON_CLICKPAD;
break;
default:
break;
}
}
}
}
int
pms_synaptics_probe_init(void *vsc)
{
struct pms_softc *psc = vsc;
struct synaptics_softc *sc = &psc->u.synaptics;
u_char cmd[1], resp[3];
int res, ver_minor, ver_major;
struct sysctllog *clog = NULL;
res = pms_sliced_command(psc->sc_kbctag, psc->sc_kbcslot,
SYNAPTICS_IDENTIFY_TOUCHPAD);
cmd[0] = PMS_SEND_DEV_STATUS;
res |= pckbport_poll_cmd(psc->sc_kbctag, psc->sc_kbcslot, cmd, 1, 3,
resp, 0);
if (res) {
aprint_debug_dev(psc->sc_dev,
"synaptics_probe: Identify Touchpad error.\n");
/*
* Reset device in case the probe confused it.
*/
doreset:
cmd[0] = PMS_RESET;
(void) pckbport_poll_cmd(psc->sc_kbctag, psc->sc_kbcslot, cmd,
1, 2, resp, 1);
return (res);
}
if (resp[1] != SYNAPTICS_MAGIC_BYTE) {
aprint_debug_dev(psc->sc_dev,
"synaptics_probe: Not synaptics.\n");
res = 1;
goto doreset;
}
sc->flags = 0;
/* Check for minimum version and print a nice message. */
ver_major = resp[2] & 0x0f;
ver_minor = resp[0];
aprint_normal_dev(psc->sc_dev, "Synaptics touchpad version %d.%d\n",
ver_major, ver_minor);
if (ver_major * 10 + ver_minor < SYNAPTICS_MIN_VERSION) {
/* No capability query support. */
sc->caps = 0;
goto done;
}
/* Query the hardware capabilities. */
res = pms_sliced_command(psc->sc_kbctag, psc->sc_kbcslot,
SYNAPTICS_READ_CAPABILITIES);
cmd[0] = PMS_SEND_DEV_STATUS;
res |= pckbport_poll_cmd(psc->sc_kbctag, psc->sc_kbcslot, cmd, 1, 3,
resp, 0);
if (res) {
/* Hmm, failed to get capabilites. */
aprint_error_dev(psc->sc_dev,
"synaptics_probe: Failed to query capabilities.\n");
goto doreset;
}
sc->caps = (resp[0] << 8) | resp[2];
if (sc->caps & SYNAPTICS_CAP_MBUTTON)
sc->flags |= SYN_FLAG_HAS_MIDDLE_BUTTON;
if (sc->caps & SYNAPTICS_CAP_4BUTTON)
sc->flags |= SYN_FLAG_HAS_BUTTONS_4_5;
if (sc->caps & SYNAPTICS_CAP_EXTENDED) {
pms_synaptics_probe_extended(psc);
}
if (sc->flags) {
const char comma[] = ", ";
const char *sep = "";
aprint_normal_dev(psc->sc_dev, "");
if (sc->flags & SYN_FLAG_HAS_EXTENDED_WMODE) {
aprint_normal("%sExtended W mode", sep);
sep = comma;
}
if (sc->flags & SYN_FLAG_HAS_PASSTHROUGH) {
aprint_normal("%sPassthrough", sep);
sep = comma;
}
if (sc->flags & SYN_FLAG_HAS_MIDDLE_BUTTON) {
aprint_normal("%sMiddle button", sep);
sep = comma;
}
if (sc->flags & SYN_FLAG_HAS_BUTTONS_4_5) {
aprint_normal("%sButtons 4/5", sep);
sep = comma;
}
if (sc->flags & SYN_FLAG_HAS_UP_DOWN_BUTTONS) {
aprint_normal("%sUp/down buttons", sep);
sep = comma;
}
if (sc->flags & SYN_FLAG_HAS_PALM_DETECT) {
aprint_normal("%sPalm detect", sep);
sep = comma;
}
if (sc->flags & SYN_FLAG_HAS_ONE_BUTTON_CLICKPAD) {
aprint_normal("%sOne button click pad", sep);
sep = comma;
}
if (sc->flags & SYN_FLAG_HAS_TWO_BUTTON_CLICKPAD) {
aprint_normal("%sTwo button click pad", sep);
sep = comma;
}
if (sc->flags & SYN_FLAG_HAS_VERTICAL_SCROLL) {
aprint_normal("%sVertical scroll", sep);
sep = comma;
}
if (sc->flags & SYN_FLAG_HAS_HORIZONTAL_SCROLL) {
aprint_normal("%sHorizontal scroll", sep);
sep = comma;
}
if (sc->flags & SYN_FLAG_HAS_MULTI_FINGER_REPORT) {
aprint_normal("%sMulti-finger Report", sep);
sep = comma;
}
if (sc->flags & SYN_FLAG_HAS_MULTI_FINGER)
aprint_normal("%sMulti-finger", sep);
aprint_normal("\n");
}
done:
pms_sysctl_synaptics(&clog);
pckbport_set_inputhandler(psc->sc_kbctag, psc->sc_kbcslot,
pms_synaptics_input, psc, device_xname(psc->sc_dev));
return (0);
}
void
pms_synaptics_enable(void *vsc)
{
struct pms_softc *psc = vsc;
struct synaptics_softc *sc = &psc->u.synaptics;
u_char cmd[2], resp[2];
int res;
if (sc->flags & SYN_FLAG_HAS_PASSTHROUGH) {
/*
* Extended capability probes can confuse the passthrough device;
* reset the touchpad now to cure that.
*/
cmd[0] = PMS_RESET;
res = pckbport_poll_cmd(psc->sc_kbctag, psc->sc_kbcslot, cmd,
1, 2, resp, 1);
}
/*
* Enable Absolute mode with W (width) reporting, and set
* the packet rate to maximum (80 packets per second).
*/
res = pms_sliced_command(psc->sc_kbctag, psc->sc_kbcslot,
SYNAPTICS_MODE_ABSOLUTE | SYNAPTICS_MODE_W | SYNAPTICS_MODE_RATE);
cmd[0] = PMS_SET_SAMPLE;
cmd[1] = SYNAPTICS_CMD_SET_MODE2;
res |= pckbport_enqueue_cmd(psc->sc_kbctag, psc->sc_kbcslot, cmd, 2, 0,
1, NULL);
sc->up_down = 0;
sc->prev_fingers = 0;
sc->gesture_start_x = sc->gesture_start_y = 0;
sc->gesture_start_packet = 0;
sc->gesture_tap_packet = 0;
sc->gesture_type = 0;
sc->gesture_buttons = 0;
sc->rem_x = sc->rem_y = 0;
sc->movement_history = 0;
if (res) {
aprint_error_dev(psc->sc_dev,
"synaptics_enable: Error enabling device.\n");
}
}
void
pms_synaptics_resume(void *vsc)
{
struct pms_softc *psc = vsc;
unsigned char cmd[1],resp[2] = { 0,0 };
int res;
cmd[0] = PMS_RESET;
res = pckbport_poll_cmd(psc->sc_kbctag, psc->sc_kbcslot, cmd, 1, 2,
resp, 1);
aprint_debug_dev(psc->sc_dev,
"pms_synaptics_resume: reset on resume %d 0x%02x 0x%02x\n",
res, resp[0], resp[1]);
}
static void
pms_sysctl_synaptics(struct sysctllog **clog)
{
int rc, root_num;
const struct sysctlnode *node;
if ((rc = sysctl_createv(clog, 0, NULL, &node,
CTLFLAG_PERMANENT, CTLTYPE_NODE, "synaptics",
SYSCTL_DESCR("Synaptics touchpad controls"),
NULL, 0, NULL, 0, CTL_HW, CTL_CREATE, CTL_EOL)) != 0)
goto err;
root_num = node->sysctl_num;
if ((rc = sysctl_createv(clog, 0, NULL, &node,
CTLFLAG_PERMANENT | CTLFLAG_READWRITE,
CTLTYPE_INT, "up_down_emulation",
SYSCTL_DESCR("Middle button/Z-axis emulation with up/down buttons"),
pms_sysctl_synaptics_verify, 0,
&synaptics_up_down_emul,
0, CTL_HW, root_num, CTL_CREATE,
CTL_EOL)) != 0)
goto err;
synaptics_up_down_emul_nodenum = node->sysctl_num;
if ((rc = sysctl_createv(clog, 0, NULL, &node,
CTLFLAG_PERMANENT | CTLFLAG_READWRITE,
CTLTYPE_INT, "up_down_motion_delta",
SYSCTL_DESCR("Up/down button Z-axis emulation rate"),
pms_sysctl_synaptics_verify, 0,
&synaptics_up_down_motion_delta,
0, CTL_HW, root_num, CTL_CREATE,
CTL_EOL)) != 0)
goto err;
synaptics_up_down_motion_delta_nodenum = node->sysctl_num;
if ((rc = sysctl_createv(clog, 0, NULL, &node,
CTLFLAG_PERMANENT | CTLFLAG_READWRITE,
CTLTYPE_INT, "gesture_move",
SYSCTL_DESCR("Movement greater than this between taps cancels gesture"),
pms_sysctl_synaptics_verify, 0,
&synaptics_gesture_move,
0, CTL_HW, root_num, CTL_CREATE,
CTL_EOL)) != 0)
goto err;
synaptics_gesture_move_nodenum = node->sysctl_num;
if ((rc = sysctl_createv(clog, 0, NULL, &node,
CTLFLAG_PERMANENT | CTLFLAG_READWRITE,
CTLTYPE_INT, "gesture_length",
SYSCTL_DESCR("Time period in which tap is recognised as a gesture"),
pms_sysctl_synaptics_verify, 0,
&synaptics_gesture_length,
0, CTL_HW, root_num, CTL_CREATE,
CTL_EOL)) != 0)
goto err;
synaptics_gesture_length_nodenum = node->sysctl_num;
if ((rc = sysctl_createv(clog, 0, NULL, &node,
CTLFLAG_PERMANENT | CTLFLAG_READWRITE,
CTLTYPE_INT, "edge_left",
SYSCTL_DESCR("Define left edge of touchpad"),
pms_sysctl_synaptics_verify, 0,
&synaptics_edge_left,
0, CTL_HW, root_num, CTL_CREATE,
CTL_EOL)) != 0)
goto err;
synaptics_edge_left_nodenum = node->sysctl_num;
if ((rc = sysctl_createv(clog, 0, NULL, &node,
CTLFLAG_PERMANENT | CTLFLAG_READWRITE,
CTLTYPE_INT, "edge_right",
SYSCTL_DESCR("Define right edge of touchpad"),
pms_sysctl_synaptics_verify, 0,
&synaptics_edge_right,
0, CTL_HW, root_num, CTL_CREATE,
CTL_EOL)) != 0)
goto err;
synaptics_edge_right_nodenum = node->sysctl_num;
if ((rc = sysctl_createv(clog, 0, NULL, &node,
CTLFLAG_PERMANENT | CTLFLAG_READWRITE,
CTLTYPE_INT, "edge_top",
SYSCTL_DESCR("Define top edge of touchpad"),
pms_sysctl_synaptics_verify, 0,
&synaptics_edge_top,
0, CTL_HW, root_num, CTL_CREATE,
CTL_EOL)) != 0)
goto err;
synaptics_edge_top_nodenum = node->sysctl_num;
if ((rc = sysctl_createv(clog, 0, NULL, &node,
CTLFLAG_PERMANENT | CTLFLAG_READWRITE,
CTLTYPE_INT, "edge_bottom",
SYSCTL_DESCR("Define bottom edge of touchpad"),
pms_sysctl_synaptics_verify, 0,
&synaptics_edge_bottom,
0, CTL_HW, root_num, CTL_CREATE,
CTL_EOL)) != 0)
goto err;
synaptics_edge_bottom_nodenum = node->sysctl_num;
if ((rc = sysctl_createv(clog, 0, NULL, &node,
CTLFLAG_PERMANENT | CTLFLAG_READWRITE,
CTLTYPE_INT, "edge_motion_delta",
SYSCTL_DESCR("Define edge motion rate"),
pms_sysctl_synaptics_verify, 0,
&synaptics_edge_motion_delta,
0, CTL_HW, root_num, CTL_CREATE,
CTL_EOL)) != 0)
goto err;
synaptics_edge_motion_delta_nodenum = node->sysctl_num;
if ((rc = sysctl_createv(clog, 0, NULL, &node,
CTLFLAG_PERMANENT | CTLFLAG_READWRITE,
CTLTYPE_INT, "finger_high",
SYSCTL_DESCR("Define finger applied pressure threshold"),
pms_sysctl_synaptics_verify, 0,
&synaptics_finger_high,
0, CTL_HW, root_num, CTL_CREATE,
CTL_EOL)) != 0)
goto err;
synaptics_finger_high_nodenum = node->sysctl_num;
if ((rc = sysctl_createv(clog, 0, NULL, &node,
CTLFLAG_PERMANENT | CTLFLAG_READWRITE,
CTLTYPE_INT, "finger_low",
SYSCTL_DESCR("Define finger removed pressure threshold"),
pms_sysctl_synaptics_verify, 0,
&synaptics_finger_low,
0, CTL_HW, root_num, CTL_CREATE,
CTL_EOL)) != 0)
goto err;
synaptics_finger_low_nodenum = node->sysctl_num;
if ((rc = sysctl_createv(clog, 0, NULL, &node,
CTLFLAG_PERMANENT | CTLFLAG_READWRITE,
CTLTYPE_INT, "two_fingers_emulation",
SYSCTL_DESCR("Map two fingers to middle button"),
pms_sysctl_synaptics_verify, 0,
&synaptics_two_fingers_emul,
0, CTL_HW, root_num, CTL_CREATE,
CTL_EOL)) != 0)
goto err;
synaptics_two_fingers_emul_nodenum = node->sysctl_num;
if ((rc = sysctl_createv(clog, 0, NULL, &node,
CTLFLAG_PERMANENT | CTLFLAG_READWRITE,
CTLTYPE_INT, "scale_x",
SYSCTL_DESCR("Horizontal movement scale factor"),
pms_sysctl_synaptics_verify, 0,
&synaptics_scale_x,
0, CTL_HW, root_num, CTL_CREATE,
CTL_EOL)) != 0)
goto err;
synaptics_scale_x_nodenum = node->sysctl_num;
if ((rc = sysctl_createv(clog, 0, NULL, &node,
CTLFLAG_PERMANENT | CTLFLAG_READWRITE,
CTLTYPE_INT, "scale_y",
SYSCTL_DESCR("Vertical movement scale factor"),
pms_sysctl_synaptics_verify, 0,
&synaptics_scale_y,
0, CTL_HW, root_num, CTL_CREATE,
CTL_EOL)) != 0)
goto err;
synaptics_scale_y_nodenum = node->sysctl_num;
if ((rc = sysctl_createv(clog, 0, NULL, &node,
CTLFLAG_PERMANENT | CTLFLAG_READWRITE,
CTLTYPE_INT, "max_speed_x",
SYSCTL_DESCR("Horizontal movement maximum speed"),
pms_sysctl_synaptics_verify, 0,
&synaptics_max_speed_x,
0, CTL_HW, root_num, CTL_CREATE,
CTL_EOL)) != 0)
goto err;
synaptics_max_speed_x_nodenum = node->sysctl_num;
if ((rc = sysctl_createv(clog, 0, NULL, &node,
CTLFLAG_PERMANENT | CTLFLAG_READWRITE,
CTLTYPE_INT, "max_speed_y",
SYSCTL_DESCR("Vertical movement maximum speed"),
pms_sysctl_synaptics_verify, 0,
&synaptics_max_speed_y,
0, CTL_HW, root_num, CTL_CREATE,
CTL_EOL)) != 0)
goto err;
synaptics_max_speed_y_nodenum = node->sysctl_num;
if ((rc = sysctl_createv(clog, 0, NULL, &node,
CTLFLAG_PERMANENT | CTLFLAG_READWRITE,
CTLTYPE_INT, "movement_threshold",
SYSCTL_DESCR("Minimum reported movement threshold"),
pms_sysctl_synaptics_verify, 0,
&synaptics_movement_threshold,
0, CTL_HW, root_num, CTL_CREATE,
CTL_EOL)) != 0)
goto err;
synaptics_movement_threshold_nodenum = node->sysctl_num;
return;
err:
aprint_error("%s: sysctl_createv failed (rc = %d)\n", __func__, rc);
}
static int
pms_sysctl_synaptics_verify(SYSCTLFN_ARGS)
{
int error, t;
struct sysctlnode node;
node = *rnode;
t = *(int *)rnode->sysctl_data;
node.sysctl_data = &t;
error = sysctl_lookup(SYSCTLFN_CALL(&node));
if (error || newp == NULL)
return error;
/* Sanity check the params. */
if (node.sysctl_num == synaptics_up_down_emul_nodenum ||
node.sysctl_num == synaptics_two_fingers_emul_nodenum) {
if (t < 0 || t > 2)
return (EINVAL);
} else
if (node.sysctl_num == synaptics_gesture_length_nodenum ||
node.sysctl_num == synaptics_edge_motion_delta_nodenum ||
node.sysctl_num == synaptics_up_down_motion_delta_nodenum) {
if (t < 0)
return (EINVAL);
} else
if (node.sysctl_num == synaptics_edge_left_nodenum ||
node.sysctl_num == synaptics_edge_bottom_nodenum) {
if (t < 0 || t > (SYNAPTICS_EDGE_MAX / 2))
return (EINVAL);
} else
if (node.sysctl_num == synaptics_edge_right_nodenum ||
node.sysctl_num == synaptics_edge_top_nodenum) {
if (t < (SYNAPTICS_EDGE_MAX / 2))
return (EINVAL);
} else
if (node.sysctl_num == synaptics_scale_x_nodenum ||
node.sysctl_num == synaptics_scale_y_nodenum) {
if (t < 1 || t > (SYNAPTICS_EDGE_MAX / 4))
return (EINVAL);
} else
if (node.sysctl_num == synaptics_finger_high_nodenum) {
if (t < 0 || t > SYNAPTICS_FINGER_PALM ||
t < synaptics_finger_low)
return (EINVAL);
} else
if (node.sysctl_num == synaptics_finger_low_nodenum) {
if (t < 0 || t > SYNAPTICS_FINGER_PALM ||
t > synaptics_finger_high)
return (EINVAL);
} else
if (node.sysctl_num == synaptics_gesture_move_nodenum ||
node.sysctl_num == synaptics_movement_threshold_nodenum) {
if (t < 0 || t > (SYNAPTICS_EDGE_MAX / 4))
return (EINVAL);
} else
return (EINVAL);
*(int *)rnode->sysctl_data = t;
return (0);
}
/* Masks for the first byte of a packet */
#define PMS_LBUTMASK 0x01
#define PMS_RBUTMASK 0x02
#define PMS_MBUTMASK 0x04
static void
pms_synaptics_parse(struct pms_softc *psc)
{
struct synaptics_softc *sc = &psc->u.synaptics;
struct synaptics_packet sp;
memset(&sp, 0, sizeof(sp));
/* Absolute X/Y coordinates of finger */
sp.sp_x = psc->packet[4] + ((psc->packet[1] & 0x0f) << 8) +
((psc->packet[3] & 0x10) << 8);
sp.sp_y = psc->packet[5] + ((psc->packet[1] & 0xf0) << 4) +
((psc->packet[3] & 0x20) << 7);
/* Pressure */
sp.sp_z = psc->packet[2];
/* Width of finger */
sp.sp_w = ((psc->packet[0] & 0x30) >> 2) +
((psc->packet[0] & 0x04) >> 1) +
((psc->packet[3] & 0x04) >> 2);
/* Left/Right button handling. */
sp.sp_left = psc->packet[0] & PMS_LBUTMASK;
sp.sp_right = psc->packet[0] & PMS_RBUTMASK;
/* Up/Down buttons. */
if (sc->flags & SYN_FLAG_HAS_BUTTONS_4_5) {
/* Old up/down buttons. */
sp.sp_up = sp.sp_left ^
(psc->packet[3] & PMS_LBUTMASK);
sp.sp_down = sp.sp_right ^
(psc->packet[3] & PMS_RBUTMASK);
} else
if (sc->flags & SYN_FLAG_HAS_UP_DOWN_BUTTONS &&
((psc->packet[0] & PMS_RBUTMASK) ^
(psc->packet[3] & PMS_RBUTMASK))) {
/* New up/down button. */
sp.sp_up = psc->packet[4] & SYN_1BUTMASK;
sp.sp_down = psc->packet[5] & SYN_2BUTMASK;
} else {
sp.sp_up = 0;
sp.sp_down = 0;
}
if(sc->flags & SYN_FLAG_HAS_ONE_BUTTON_CLICKPAD) {
/* This is not correctly specified. Read this button press
* from L/U bit.
*/
sp.sp_left = ((psc->packet[0] ^ psc->packet[3]) & 0x01) ? 1 : 0;
} else
/* Middle button. */
if (sc->flags & SYN_FLAG_HAS_MIDDLE_BUTTON) {
/* Old style Middle Button. */
sp.sp_middle = (psc->packet[0] & PMS_LBUTMASK) ^
(psc->packet[3] & PMS_LBUTMASK);
} else
if (synaptics_up_down_emul == 1) {
/* Do middle button emulation using up/down buttons */
sp.sp_middle = sp.sp_up | sp.sp_down;
sp.sp_up = sp.sp_down = 0;
} else
sp.sp_middle = 0;
pms_synaptics_process_packet(psc, &sp);
}
static void
pms_synaptics_passthrough(struct pms_softc *psc)
{
int dx, dy, dz;
int buttons, changed;
int s;
buttons = ((psc->packet[1] & PMS_LBUTMASK) ? 0x20 : 0) |
((psc->packet[1] & PMS_MBUTMASK) ? 0x40 : 0) |
((psc->packet[1] & PMS_RBUTMASK) ? 0x80 : 0);
dx = psc->packet[4];
if (dx >= 128)
dx -= 256;
if (dx == -128)
dx = -127;
dy = psc->packet[5];
if (dy >= 128)
dy -= 256;
if (dy == -128)
dy = -127;
dz = 0;
changed = buttons ^ (psc->buttons & 0xe0);
psc->buttons ^= changed;
if (dx || dy || dz || changed) {
buttons = (psc->buttons & 0x1f) | ((psc->buttons >> 5) & 0x7);
s = spltty();
wsmouse_input(psc->sc_wsmousedev,
buttons, dx, dy, dz, 0,
WSMOUSE_INPUT_DELTA);
splx(s);
}
}
static void
pms_synaptics_input(void *vsc, int data)
{
struct pms_softc *psc = vsc;
struct timeval diff;
if (!psc->sc_enabled) {
/* Interrupts are not expected. Discard the byte. */
return;
}
getmicrouptime(&psc->current);
if (psc->inputstate > 0) {
timersub(&psc->current, &psc->last, &diff);
if (diff.tv_sec > 0 || diff.tv_usec >= 40000) {
aprint_debug_dev(psc->sc_dev,
"pms_input: unusual delay (%ld.%06ld s), "
"scheduling reset\n",
(long)diff.tv_sec, (long)diff.tv_usec);
psc->inputstate = 0;
psc->sc_enabled = 0;
wakeup(&psc->sc_enabled);
return;
}
}
psc->last = psc->current;
switch (psc->inputstate) {
case 0:
if ((data & 0xc8) != 0x80) {
aprint_debug_dev(psc->sc_dev,
"pms_input: 0x%02x out of sync\n", data);
return; /* not in sync yet, discard input */
}
/*FALLTHROUGH*/
case 3:
if ((data & 8) == 8) {
aprint_debug_dev(psc->sc_dev,
"pms_input: dropped in relative mode, reset\n");
psc->inputstate = 0;
psc->sc_enabled = 0;
wakeup(&psc->sc_enabled);
return;
}
}
psc->packet[psc->inputstate++] = data & 0xff;
if (psc->inputstate == 6) {
/*
* We have a complete packet.
* Extract the pertinent details.
*/
psc->inputstate = 0;
if ((psc->packet[0] & 0xfc) == 0x84 &&
(psc->packet[3] & 0xcc) == 0xc4) {
/* W = SYNAPTICS_WIDTH_PASSTHROUGH, PS/2 passthrough */
pms_synaptics_passthrough(psc);
} else {
pms_synaptics_parse(psc);
}
}
}
static inline int
synaptics_finger_detect(struct synaptics_softc *sc, struct synaptics_packet *sp,
int *palmp)
{
int fingers;
/* Assume no palm */
*palmp = 0;
/*
* Apply some hysteresis when checking for a finger.
* When the finger is first applied, we ignore it until the
* pressure exceeds the 'high' threshold. The finger is considered
* removed only when pressure falls beneath the 'low' threshold.
*/
if ((sc->prev_fingers == 0 && sp->sp_z > synaptics_finger_high) ||
(sc->prev_fingers != 0 && sp->sp_z > synaptics_finger_low))
fingers = 1;
else
fingers = 0;
/*
* If the pad can't do palm detection, skip the rest.
*/
if (fingers == 0 || (sc->flags & SYN_FLAG_HAS_PALM_DETECT) == 0)
return (fingers);
/*
* Palm detection
*/
if (sp->sp_z > SYNAPTICS_FINGER_FLAT &&
sp->sp_w >= SYNAPTICS_WIDTH_PALM_MIN)
*palmp = 1;
if (sc->prev_fingers == 0 &&
(sp->sp_z > SYNAPTICS_FINGER_FLAT ||
sp->sp_w >= SYNAPTICS_WIDTH_PALM_MIN)) {
/*
* Contact area or pressure is too great to be a finger.
* Just ignore it for now.
*/
return (0);
}
/*
* Detect 2 and 3 fingers if supported, but only if multiple
* fingers appear within the tap gesture time period.
*/
if (sc->flags & SYN_FLAG_HAS_MULTI_FINGER &&
SYN_TIME(sc, sc->gesture_start_packet) < synaptics_gesture_length) {
switch (sp->sp_w) {
case SYNAPTICS_WIDTH_TWO_FINGERS:
fingers = 2;
break;
case SYNAPTICS_WIDTH_THREE_OR_MORE:
fingers = 3;
break;
case SYNAPTICS_WIDTH_PEN:
fingers = 1;
break;
default:
/*
* The width value can report spurious single-finger
* events after a multi-finger event.
*/
if (sc->prev_fingers > 1)
fingers = sc->prev_fingers;
else
fingers = 1;
break;
}
}
return (fingers);
}
static inline void
synaptics_gesture_detect(struct synaptics_softc *sc,
struct synaptics_packet *sp, int fingers)
{
int gesture_len, gesture_buttons;
int set_buttons;
gesture_len = SYN_TIME(sc, sc->gesture_start_packet);
gesture_buttons = sc->gesture_buttons;
if (fingers > 0 && (fingers == sc->prev_fingers)) {
/* Finger is still present */
sc->gesture_move_x = abs(sc->gesture_start_x - sp->sp_x);
sc->gesture_move_y = abs(sc->gesture_start_y - sp->sp_y);
} else
if (fingers && sc->prev_fingers == 0) {
/*
* Finger was just applied.
* If the previous gesture was a single-click, set things
* up to deal with a possible drag or double-click gesture.
* Basically, if the finger is removed again within
* 'synaptics_gesture_length' packets, this is treated
* as a double-click. Otherwise we will emulate holding
* the left button down whilst dragging the mouse.
*/
if (SYN_IS_SINGLE_TAP(sc->gesture_type))
sc->gesture_type |= SYN_GESTURE_DRAG;
sc->gesture_start_x = abs(sp->sp_x);
sc->gesture_start_y = abs(sp->sp_y);
sc->gesture_move_x = 0;
sc->gesture_move_y = 0;
sc->gesture_start_packet = sc->total_packets;
#ifdef DIAGNOSTIC
aprint_debug("Finger applied: gesture_start_x: %d gesture_start_y: %d\n",
sc->gesture_start_x, sc->gesture_start_y);
#endif
} else
if (fingers == 0 && sc->prev_fingers != 0) {
/*
* Finger was just removed.
* Check if the contact time and finger movement were
* small enough to qualify as a gesture.
* Ignore finger movement if multiple fingers were
* detected (the pad may report coordinates for any
* of the fingers).
*/
#ifdef DIAGNOSTIC
aprint_debug("Finger removed: gesture_len: %d (%d)\n",
gesture_len, synaptics_gesture_length);
aprint_debug("gesture_move_x: %d (%d) sp_x: %d\n",
sc->gesture_move_x, synaptics_gesture_move, abs(sp->sp_x));
aprint_debug("gesture_move_y: %d (%d) sp_y: %d\n",
sc->gesture_move_y, synaptics_gesture_move, abs(sp->sp_y));
#endif
if (gesture_len < synaptics_gesture_length &&
((sc->gesture_move_x < synaptics_gesture_move &&
sc->gesture_move_y < synaptics_gesture_move))) {
/*
* Looking good so far.
*/
if (SYN_IS_DRAG(sc->gesture_type)) {
/*
* Promote this gesture to double-click.
*/
sc->gesture_type |= SYN_GESTURE_DOUBLE;
sc->gesture_type &= ~SYN_GESTURE_SINGLE;
} else {
/*
* Single tap gesture. Set the tap length timer
* and flag a single-click.
*/
sc->gesture_tap_packet = sc->total_packets;
sc->gesture_type |= SYN_GESTURE_SINGLE;
/*
* The gesture can be modified depending on
* the number of fingers detected.
*
* 1: Normal left button emulation.
* 2: Either middle button or right button
* depending on the value of the two_fingers
* sysctl variable.
* 3: Right button.
*/
switch (sc->prev_fingers) {
case 2:
if (synaptics_two_fingers_emul == 1)
gesture_buttons |= PMS_RBUTMASK;
else
if (synaptics_two_fingers_emul == 2)
gesture_buttons |= PMS_MBUTMASK;
break;
case 3:
gesture_buttons |= PMS_RBUTMASK;
break;
default:
gesture_buttons |= PMS_LBUTMASK;
break;
}
}
}
/*
* Always clear drag state when the finger is removed.
*/
sc->gesture_type &= ~SYN_GESTURE_DRAG;
}
if (sc->gesture_type == 0) {
/*
* There is no gesture in progress.
* Clear emulated button state.
*/
sc->gesture_buttons = 0;
return;
}
/*
* A gesture is in progress.
*/
set_buttons = 0;
if (SYN_IS_SINGLE_TAP(sc->gesture_type)) {
/*
* Single-click.
* Activate the relevant button(s) until the
* gesture tap timer has expired.
*/
if (SYN_TIME(sc, sc->gesture_tap_packet) <
synaptics_gesture_length)
set_buttons = 1;
else
sc->gesture_type &= ~SYN_GESTURE_SINGLE;
} else
if (SYN_IS_DOUBLE_TAP(sc->gesture_type) && sc->prev_fingers == 0) {
/*
* Double-click.
* Activate the relevant button(s) once.
*/
set_buttons = 1;
sc->gesture_type &= ~SYN_GESTURE_DOUBLE;
}
if (set_buttons || SYN_IS_DRAG(sc->gesture_type)) {
/*
* Single-click and drag.
* Maintain button state until the finger is removed.
*/
sp->sp_left |= gesture_buttons & PMS_LBUTMASK;
sp->sp_right |= gesture_buttons & PMS_RBUTMASK;
sp->sp_middle |= gesture_buttons & PMS_MBUTMASK;
}
sc->gesture_buttons = gesture_buttons;
}
static inline int
synaptics_filter_policy(struct synaptics_softc *sc, int *history, int value)
{
int a, b, rv, count;
count = sc->total_packets;
/*
* Once we've accumulated at least SYN_HIST_SIZE values, combine
* each new value with the previous two and return the average.
*
* This is necessary when the touchpad is operating in 80 packets
* per second mode, as it performs little internal filtering on
* reported values.
*
* Using a rolling average helps to filter out jitter caused by
* tiny finger movements.
*/
if (sc->movement_history >= SYN_HIST_SIZE) {
a = (history[(count + 0) % SYN_HIST_SIZE] +
history[(count + 1) % SYN_HIST_SIZE]) / 2;
b = (value + history[(count + 0) % SYN_HIST_SIZE]) / 2;
rv = b - a;
/*
* Don't report the movement if it's below a certain
* threshold.
*/
if (abs(rv) < synaptics_movement_threshold)
rv = 0;
} else
rv = 0;
/*
* Add the new value to the history buffer.
*/
history[(count + 1) % SYN_HIST_SIZE] = value;
return (rv);
}
/* Edge detection */
#define SYN_EDGE_TOP 1
#define SYN_EDGE_BOTTOM 2
#define SYN_EDGE_LEFT 4
#define SYN_EDGE_RIGHT 8
static inline int
synaptics_check_edge(int x, int y)
{
int rv = 0;
if (x < synaptics_edge_left)
rv |= SYN_EDGE_LEFT;
else
if (x > synaptics_edge_right)
rv |= SYN_EDGE_RIGHT;
if (y < synaptics_edge_bottom)
rv |= SYN_EDGE_BOTTOM;
else
if (y > synaptics_edge_top)
rv |= SYN_EDGE_TOP;
return (rv);
}
static inline int
synaptics_edge_motion(struct synaptics_softc *sc, int delta, int dir)
{
/*
* When edge motion is enabled, synaptics_edge_motion_delta is
* combined with the current delta, together with the direction
* in which to simulate the motion. The result is added to
* the delta derived from finger movement. This provides a smooth
* transition from finger movement to edge motion.
*/
delta = synaptics_edge_motion_delta + (dir * delta);
if (delta < 0)
return (0);
if (delta > synaptics_edge_motion_delta)
return (synaptics_edge_motion_delta);
return (delta);
}
static inline int
synaptics_scale(int delta, int scale, int *remp)
{
int rv;
/*
* Scale the raw delta in Synaptics coordinates (0-6143) into
* something more reasonable by dividing the raw delta by a
* scale factor. Any remainder from the previous scale result
* is added to the current delta before scaling.
* This prevents loss of resolution for very small/slow
* movements of the finger.
*/
delta += *remp;
rv = delta / scale;
*remp = delta % scale;
return (rv);
}
static inline void
synaptics_movement(struct synaptics_softc *sc, struct synaptics_packet *sp,
int *dxp, int *dyp)
{
int dx, dy, edge;
/*
* Compute the next values of dx and dy
*/
dx = synaptics_filter_policy(sc, sc->history_x, sp->sp_x);
dy = synaptics_filter_policy(sc, sc->history_y, sp->sp_y);
/*
* If we're dealing with a drag gesture, and the finger moves to
* the edge of the touchpad, apply edge motion emulation if it
* is enabled.
*/
if (synaptics_edge_motion_delta && SYN_IS_DRAG(sc->gesture_type)) {
edge = synaptics_check_edge(sp->sp_x, sp->sp_y);
if (edge & SYN_EDGE_LEFT)
dx -= synaptics_edge_motion(sc, dx, 1);
if (edge & SYN_EDGE_RIGHT)
dx += synaptics_edge_motion(sc, dx, -1);
if (edge & SYN_EDGE_BOTTOM)
dy -= synaptics_edge_motion(sc, dy, 1);
if (edge & SYN_EDGE_TOP)
dy += synaptics_edge_motion(sc, dy, -1);
}
/*
* Apply scaling to both deltas
*/
dx = synaptics_scale(dx, synaptics_scale_x, &sc->rem_x);
dy = synaptics_scale(dy, synaptics_scale_y, &sc->rem_y);
/*
* Clamp deltas to specified maximums.
*/
if (dx > synaptics_max_speed_x)
dx = synaptics_max_speed_x;
if (dy > synaptics_max_speed_y)
dy = synaptics_max_speed_y;
*dxp = dx;
*dyp = dy;
sc->movement_history++;
}
static void
pms_synaptics_process_packet(struct pms_softc *psc, struct synaptics_packet *sp)
{
struct synaptics_softc *sc = &psc->u.synaptics;
int dx, dy, dz;
int fingers, palm, buttons, changed;
int s;
/*
* Do Z-axis emulation using up/down buttons if required.
* Note that the pad will send a one second burst of packets
* when an up/down button is pressed and held. At the moment
* we don't deal with auto-repeat, so convert the burst into
* a one-shot.
*/
dz = 0;
if (synaptics_up_down_emul == 2) {
if (sc->up_down == 0) {
if (sp->sp_up && sp->sp_down) {
/*
* Most up/down buttons will be actuated using
* a rocker switch, so we should never see
* them both simultaneously. But just in case,
* treat this situation as a middle button
* event.
*/
sp->sp_middle = 1;
} else
if (sp->sp_up)
dz = -synaptics_up_down_motion_delta;
else
if (sp->sp_down)
dz = synaptics_up_down_motion_delta;
}
sc->up_down = sp->sp_up | sp->sp_down;
sp->sp_up = sp->sp_down = 0;
}
/*
* Determine whether or not a finger is on the pad.
* On some pads, this will return the number of fingers
* detected.
*/
fingers = synaptics_finger_detect(sc, sp, &palm);
/*
* Do gesture processing only if we didn't detect a palm.
*/
if (palm == 0)
synaptics_gesture_detect(sc, sp, fingers);
else
sc->gesture_type = sc->gesture_buttons = 0;
/*
* Determine what buttons to report
*/
buttons = (sp->sp_left ? 0x1 : 0) |
(sp->sp_middle ? 0x2 : 0) |
(sp->sp_right ? 0x4 : 0) |
(sp->sp_up ? 0x8 : 0) |
(sp->sp_down ? 0x10 : 0);
changed = buttons ^ (psc->buttons & 0x1f);
psc->buttons ^= changed;
sc->prev_fingers = fingers;
sc->total_packets++;
/*
* Do movement processing IFF we have a single finger and no palm.
*/
if (fingers == 1 && palm == 0)
synaptics_movement(sc, sp, &dx, &dy);
else {
/*
* No valid finger. Therefore no movement.
*/
sc->movement_history = 0;
sc->rem_x = sc->rem_y = 0;
dx = dy = 0;
}
/*
* Pass the final results up to wsmouse_input() if necessary.
*/
if (dx || dy || dz || changed) {
buttons = (psc->buttons & 0x1f) | ((psc->buttons >> 5) & 0x7);
s = spltty();
wsmouse_input(psc->sc_wsmousedev,
buttons,
dx, dy, dz, 0,
WSMOUSE_INPUT_DELTA);
splx(s);
}
}
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