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freebsd-dev/sys/dev/usb/input/atp.c
Pedro F. Giffuni 718cf2ccb9 sys/dev: further adoption of SPDX licensing ID tags. 
Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.
2017-11-27 14:52:40 +00:00

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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2014 Rohit Grover
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*/
/*
* Some tables, structures, definitions and constant values for the
* touchpad protocol has been copied from Linux's
* "drivers/input/mouse/bcm5974.c" which has the following copyright
* holders under GPLv2. All device specific code in this driver has
* been written from scratch. The decoding algorithm is based on
* output from FreeBSD's usbdump.
*
* Copyright (C) 2008 Henrik Rydberg (rydberg@euromail.se)
* Copyright (C) 2008 Scott Shawcroft (scott.shawcroft@gmail.com)
* Copyright (C) 2001-2004 Greg Kroah-Hartman (greg@kroah.com)
* Copyright (C) 2005 Johannes Berg (johannes@sipsolutions.net)
* Copyright (C) 2005 Stelian Pop (stelian@popies.net)
* Copyright (C) 2005 Frank Arnold (frank@scirocco-5v-turbo.de)
* Copyright (C) 2005 Peter Osterlund (petero2@telia.com)
* Copyright (C) 2005 Michael Hanselmann (linux-kernel@hansmi.ch)
* Copyright (C) 2006 Nicolas Boichat (nicolas@boichat.ch)
*/
/*
* Author's note: 'atp' supports two distinct families of Apple trackpad
* products: the older Fountain/Geyser and the latest Wellspring trackpads.
* The first version made its appearance with FreeBSD 8 and worked only with
* the Fountain/Geyser hardware. A fork of this driver for Wellspring was
* contributed by Huang Wen Hui. This driver unifies the Wellspring effort
* and also improves upon the original work.
*
* I'm grateful to Stephan Scheunig, Angela Naegele, and Nokia IT-support
* for helping me with access to hardware. Thanks also go to Nokia for
* giving me an opportunity to do this work.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/stdint.h>
#include <sys/stddef.h>
#include <sys/param.h>
#include <sys/types.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <sys/module.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/sysctl.h>
#include <sys/malloc.h>
#include <sys/conf.h>
#include <sys/fcntl.h>
#include <sys/file.h>
#include <sys/selinfo.h>
#include <sys/poll.h>
#include <dev/usb/usb.h>
#include <dev/usb/usbdi.h>
#include <dev/usb/usbdi_util.h>
#include <dev/usb/usbhid.h>
#include "usbdevs.h"
#define USB_DEBUG_VAR atp_debug
#include <dev/usb/usb_debug.h>
#include <sys/mouse.h>
#define ATP_DRIVER_NAME "atp"
/*
* Driver specific options: the following options may be set by
* `options' statements in the kernel configuration file.
*/
/* The divisor used to translate sensor reported positions to mickeys. */
#ifndef ATP_SCALE_FACTOR
#define ATP_SCALE_FACTOR 16
#endif
/* Threshold for small movement noise (in mickeys) */
#ifndef ATP_SMALL_MOVEMENT_THRESHOLD
#define ATP_SMALL_MOVEMENT_THRESHOLD 30
#endif
/* Threshold of instantaneous deltas beyond which movement is considered fast.*/
#ifndef ATP_FAST_MOVEMENT_TRESHOLD
#define ATP_FAST_MOVEMENT_TRESHOLD 150
#endif
/*
* This is the age in microseconds beyond which a touch is considered
* to be a slide; and therefore a tap event isn't registered.
*/
#ifndef ATP_TOUCH_TIMEOUT
#define ATP_TOUCH_TIMEOUT 125000
#endif
#ifndef ATP_IDLENESS_THRESHOLD
#define ATP_IDLENESS_THRESHOLD 10
#endif
#ifndef FG_SENSOR_NOISE_THRESHOLD
#define FG_SENSOR_NOISE_THRESHOLD 2
#endif
/*
* A double-tap followed by a single-finger slide is treated as a
* special gesture. The driver responds to this gesture by assuming a
* virtual button-press for the lifetime of the slide. The following
* threshold is the maximum time gap (in microseconds) between the two
* tap events preceding the slide for such a gesture.
*/
#ifndef ATP_DOUBLE_TAP_N_DRAG_THRESHOLD
#define ATP_DOUBLE_TAP_N_DRAG_THRESHOLD 200000
#endif
/*
* The wait duration in ticks after losing a touch contact before
* zombied strokes are reaped and turned into button events.
*/
#define ATP_ZOMBIE_STROKE_REAP_INTERVAL (hz / 20) /* 50 ms */
/* The multiplier used to translate sensor reported positions to mickeys. */
#define FG_SCALE_FACTOR 380
/*
* The movement threshold for a stroke; this is the maximum difference
* in position which will be resolved as a continuation of a stroke
* component.
*/
#define FG_MAX_DELTA_MICKEYS ((3 * (FG_SCALE_FACTOR)) >> 1)
/* Distance-squared threshold for matching a finger with a known stroke */
#ifndef WSP_MAX_ALLOWED_MATCH_DISTANCE_SQ
#define WSP_MAX_ALLOWED_MATCH_DISTANCE_SQ 1000000
#endif
/* Ignore pressure spans with cumulative press. below this value. */
#define FG_PSPAN_MIN_CUM_PRESSURE 10
/* Maximum allowed width for pressure-spans.*/
#define FG_PSPAN_MAX_WIDTH 4
/* end of driver specific options */
/* Tunables */
static SYSCTL_NODE(_hw_usb, OID_AUTO, atp, CTLFLAG_RW, 0, "USB ATP");
#ifdef USB_DEBUG
enum atp_log_level {
ATP_LLEVEL_DISABLED = 0,
ATP_LLEVEL_ERROR,
ATP_LLEVEL_DEBUG, /* for troubleshooting */
ATP_LLEVEL_INFO, /* for diagnostics */
};
static int atp_debug = ATP_LLEVEL_ERROR; /* the default is to only log errors */
SYSCTL_INT(_hw_usb_atp, OID_AUTO, debug, CTLFLAG_RWTUN,
&atp_debug, ATP_LLEVEL_ERROR, "ATP debug level");
#endif /* USB_DEBUG */
static u_int atp_touch_timeout = ATP_TOUCH_TIMEOUT;
SYSCTL_UINT(_hw_usb_atp, OID_AUTO, touch_timeout, CTLFLAG_RWTUN,
&atp_touch_timeout, 125000, "age threshold in microseconds for a touch");
static u_int atp_double_tap_threshold = ATP_DOUBLE_TAP_N_DRAG_THRESHOLD;
SYSCTL_UINT(_hw_usb_atp, OID_AUTO, double_tap_threshold, CTLFLAG_RWTUN,
&atp_double_tap_threshold, ATP_DOUBLE_TAP_N_DRAG_THRESHOLD,
"maximum time in microseconds to allow association between a double-tap and "
"drag gesture");
static u_int atp_mickeys_scale_factor = ATP_SCALE_FACTOR;
static int atp_sysctl_scale_factor_handler(SYSCTL_HANDLER_ARGS);
SYSCTL_PROC(_hw_usb_atp, OID_AUTO, scale_factor, CTLTYPE_UINT | CTLFLAG_RWTUN,
&atp_mickeys_scale_factor, sizeof(atp_mickeys_scale_factor),
atp_sysctl_scale_factor_handler, "IU", "movement scale factor");
static u_int atp_small_movement_threshold = ATP_SMALL_MOVEMENT_THRESHOLD;
SYSCTL_UINT(_hw_usb_atp, OID_AUTO, small_movement, CTLFLAG_RWTUN,
&atp_small_movement_threshold, ATP_SMALL_MOVEMENT_THRESHOLD,
"the small movement black-hole for filtering noise");
static u_int atp_tap_minimum = 1;
SYSCTL_UINT(_hw_usb_atp, OID_AUTO, tap_minimum, CTLFLAG_RWTUN,
&atp_tap_minimum, 1, "Minimum number of taps before detection");
/*
* Strokes which accumulate at least this amount of absolute movement
* from the aggregate of their components are considered as
* slides. Unit: mickeys.
*/
static u_int atp_slide_min_movement = 2 * ATP_SMALL_MOVEMENT_THRESHOLD;
SYSCTL_UINT(_hw_usb_atp, OID_AUTO, slide_min_movement, CTLFLAG_RWTUN,
&atp_slide_min_movement, 2 * ATP_SMALL_MOVEMENT_THRESHOLD,
"strokes with at least this amt. of movement are considered slides");
/*
* The minimum age of a stroke for it to be considered mature; this
* helps filter movements (noise) from immature strokes. Units: interrupts.
*/
static u_int atp_stroke_maturity_threshold = 4;
SYSCTL_UINT(_hw_usb_atp, OID_AUTO, stroke_maturity_threshold, CTLFLAG_RWTUN,
&atp_stroke_maturity_threshold, 4,
"the minimum age of a stroke for it to be considered mature");
typedef enum atp_trackpad_family {
TRACKPAD_FAMILY_FOUNTAIN_GEYSER,
TRACKPAD_FAMILY_WELLSPRING,
TRACKPAD_FAMILY_MAX /* keep this at the tail end of the enumeration */
} trackpad_family_t;
enum fountain_geyser_product {
FOUNTAIN,
GEYSER1,
GEYSER1_17inch,
GEYSER2,
GEYSER3,
GEYSER4,
FOUNTAIN_GEYSER_PRODUCT_MAX /* keep this at the end */
};
enum wellspring_product {
WELLSPRING1,
WELLSPRING2,
WELLSPRING3,
WELLSPRING4,
WELLSPRING4A,
WELLSPRING5,
WELLSPRING6A,
WELLSPRING6,
WELLSPRING5A,
WELLSPRING7,
WELLSPRING7A,
WELLSPRING8,
WELLSPRING_PRODUCT_MAX /* keep this at the end of the enumeration */
};
/* trackpad header types */
enum fountain_geyser_trackpad_type {
FG_TRACKPAD_TYPE_GEYSER1,
FG_TRACKPAD_TYPE_GEYSER2,
FG_TRACKPAD_TYPE_GEYSER3,
FG_TRACKPAD_TYPE_GEYSER4,
};
enum wellspring_trackpad_type {
WSP_TRACKPAD_TYPE1, /* plain trackpad */
WSP_TRACKPAD_TYPE2, /* button integrated in trackpad */
WSP_TRACKPAD_TYPE3 /* additional header fields since June 2013 */
};
/*
* Trackpad family and product and family are encoded together in the
* driver_info value associated with a trackpad product.
*/
#define N_PROD_BITS 8 /* Number of bits used to encode product */
#define ENCODE_DRIVER_INFO(FAMILY, PROD) \
(((FAMILY) << N_PROD_BITS) | (PROD))
#define DECODE_FAMILY_FROM_DRIVER_INFO(INFO) ((INFO) >> N_PROD_BITS)
#define DECODE_PRODUCT_FROM_DRIVER_INFO(INFO) \
((INFO) & ((1 << N_PROD_BITS) - 1))
#define FG_DRIVER_INFO(PRODUCT) \
ENCODE_DRIVER_INFO(TRACKPAD_FAMILY_FOUNTAIN_GEYSER, PRODUCT)
#define WELLSPRING_DRIVER_INFO(PRODUCT) \
ENCODE_DRIVER_INFO(TRACKPAD_FAMILY_WELLSPRING, PRODUCT)
/*
* The following structure captures the state of a pressure span along
* an axis. Each contact with the touchpad results in separate
* pressure spans along the two axes.
*/
typedef struct fg_pspan {
u_int width; /* in units of sensors */
u_int cum; /* cumulative compression (from all sensors) */
u_int cog; /* center of gravity */
u_int loc; /* location (scaled using the mickeys factor) */
boolean_t matched; /* to track pspans as they match against strokes. */
} fg_pspan;
#define FG_MAX_PSPANS_PER_AXIS 3
#define FG_MAX_STROKES (2 * FG_MAX_PSPANS_PER_AXIS)
#define WELLSPRING_INTERFACE_INDEX 1
/* trackpad finger data offsets, le16-aligned */
#define WSP_TYPE1_FINGER_DATA_OFFSET (13 * 2)
#define WSP_TYPE2_FINGER_DATA_OFFSET (15 * 2)
#define WSP_TYPE3_FINGER_DATA_OFFSET (19 * 2)
/* trackpad button data offsets */
#define WSP_TYPE2_BUTTON_DATA_OFFSET 15
#define WSP_TYPE3_BUTTON_DATA_OFFSET 23
/* list of device capability bits */
#define HAS_INTEGRATED_BUTTON 1
/* trackpad finger structure - little endian */
struct wsp_finger_sensor_data {
int16_t origin; /* zero when switching track finger */
int16_t abs_x; /* absolute x coordinate */
int16_t abs_y; /* absolute y coordinate */
int16_t rel_x; /* relative x coordinate */
int16_t rel_y; /* relative y coordinate */
int16_t tool_major; /* tool area, major axis */
int16_t tool_minor; /* tool area, minor axis */
int16_t orientation; /* 16384 when point, else 15 bit angle */
int16_t touch_major; /* touch area, major axis */
int16_t touch_minor; /* touch area, minor axis */
int16_t unused[3]; /* zeros */
int16_t multi; /* one finger: varies, more fingers: constant */
} __packed;
typedef struct wsp_finger {
/* to track fingers as they match against strokes. */
boolean_t matched;
/* location (scaled using the mickeys factor) */
int x;
int y;
} wsp_finger_t;
#define WSP_MAX_FINGERS 16
#define WSP_SIZEOF_FINGER_SENSOR_DATA sizeof(struct wsp_finger_sensor_data)
#define WSP_SIZEOF_ALL_FINGER_DATA (WSP_MAX_FINGERS * \
WSP_SIZEOF_FINGER_SENSOR_DATA)
#define WSP_MAX_FINGER_ORIENTATION 16384
#define ATP_SENSOR_DATA_BUF_MAX 1024
#if (ATP_SENSOR_DATA_BUF_MAX < ((WSP_MAX_FINGERS * 14 * 2) + \
WSP_TYPE3_FINGER_DATA_OFFSET))
/* note: 14 * 2 in the above is based on sizeof(struct wsp_finger_sensor_data)*/
#error "ATP_SENSOR_DATA_BUF_MAX is too small"
#endif
#define ATP_MAX_STROKES MAX(WSP_MAX_FINGERS, FG_MAX_STROKES)
#define FG_MAX_XSENSORS 26
#define FG_MAX_YSENSORS 16
/* device-specific configuration */
struct fg_dev_params {
u_int data_len; /* for sensor data */
u_int n_xsensors;
u_int n_ysensors;
enum fountain_geyser_trackpad_type prot;
};
struct wsp_dev_params {
uint8_t caps; /* device capability bitmask */
uint8_t tp_type; /* type of trackpad interface */
uint8_t finger_data_offset; /* offset to trackpad finger data */
};
static const struct fg_dev_params fg_dev_params[FOUNTAIN_GEYSER_PRODUCT_MAX] = {
[FOUNTAIN] = {
.data_len = 81,
.n_xsensors = 16,
.n_ysensors = 16,
.prot = FG_TRACKPAD_TYPE_GEYSER1
},
[GEYSER1] = {
.data_len = 81,
.n_xsensors = 16,
.n_ysensors = 16,
.prot = FG_TRACKPAD_TYPE_GEYSER1
},
[GEYSER1_17inch] = {
.data_len = 81,
.n_xsensors = 26,
.n_ysensors = 16,
.prot = FG_TRACKPAD_TYPE_GEYSER1
},
[GEYSER2] = {
.data_len = 64,
.n_xsensors = 15,
.n_ysensors = 9,
.prot = FG_TRACKPAD_TYPE_GEYSER2
},
[GEYSER3] = {
.data_len = 64,
.n_xsensors = 20,
.n_ysensors = 10,
.prot = FG_TRACKPAD_TYPE_GEYSER3
},
[GEYSER4] = {
.data_len = 64,
.n_xsensors = 20,
.n_ysensors = 10,
.prot = FG_TRACKPAD_TYPE_GEYSER4
}
};
static const STRUCT_USB_HOST_ID fg_devs[] = {
/* PowerBooks Feb 2005, iBooks G4 */
{ USB_VPI(USB_VENDOR_APPLE, 0x020e, FG_DRIVER_INFO(FOUNTAIN)) },
{ USB_VPI(USB_VENDOR_APPLE, 0x020f, FG_DRIVER_INFO(FOUNTAIN)) },
{ USB_VPI(USB_VENDOR_APPLE, 0x0210, FG_DRIVER_INFO(FOUNTAIN)) },
{ USB_VPI(USB_VENDOR_APPLE, 0x030a, FG_DRIVER_INFO(FOUNTAIN)) },
{ USB_VPI(USB_VENDOR_APPLE, 0x030b, FG_DRIVER_INFO(GEYSER1)) },
/* PowerBooks Oct 2005 */
{ USB_VPI(USB_VENDOR_APPLE, 0x0214, FG_DRIVER_INFO(GEYSER2)) },
{ USB_VPI(USB_VENDOR_APPLE, 0x0215, FG_DRIVER_INFO(GEYSER2)) },
{ USB_VPI(USB_VENDOR_APPLE, 0x0216, FG_DRIVER_INFO(GEYSER2)) },
/* Core Duo MacBook & MacBook Pro */
{ USB_VPI(USB_VENDOR_APPLE, 0x0217, FG_DRIVER_INFO(GEYSER3)) },
{ USB_VPI(USB_VENDOR_APPLE, 0x0218, FG_DRIVER_INFO(GEYSER3)) },
{ USB_VPI(USB_VENDOR_APPLE, 0x0219, FG_DRIVER_INFO(GEYSER3)) },
/* Core2 Duo MacBook & MacBook Pro */
{ USB_VPI(USB_VENDOR_APPLE, 0x021a, FG_DRIVER_INFO(GEYSER4)) },
{ USB_VPI(USB_VENDOR_APPLE, 0x021b, FG_DRIVER_INFO(GEYSER4)) },
{ USB_VPI(USB_VENDOR_APPLE, 0x021c, FG_DRIVER_INFO(GEYSER4)) },
/* Core2 Duo MacBook3,1 */
{ USB_VPI(USB_VENDOR_APPLE, 0x0229, FG_DRIVER_INFO(GEYSER4)) },
{ USB_VPI(USB_VENDOR_APPLE, 0x022a, FG_DRIVER_INFO(GEYSER4)) },
{ USB_VPI(USB_VENDOR_APPLE, 0x022b, FG_DRIVER_INFO(GEYSER4)) },
/* 17 inch PowerBook */
{ USB_VPI(USB_VENDOR_APPLE, 0x020d, FG_DRIVER_INFO(GEYSER1_17inch)) },
};
static const struct wsp_dev_params wsp_dev_params[WELLSPRING_PRODUCT_MAX] = {
[WELLSPRING1] = {
.caps = 0,
.tp_type = WSP_TRACKPAD_TYPE1,
.finger_data_offset = WSP_TYPE1_FINGER_DATA_OFFSET,
},
[WELLSPRING2] = {
.caps = 0,
.tp_type = WSP_TRACKPAD_TYPE1,
.finger_data_offset = WSP_TYPE1_FINGER_DATA_OFFSET,
},
[WELLSPRING3] = {
.caps = HAS_INTEGRATED_BUTTON,
.tp_type = WSP_TRACKPAD_TYPE2,
.finger_data_offset = WSP_TYPE2_FINGER_DATA_OFFSET,
},
[WELLSPRING4] = {
.caps = HAS_INTEGRATED_BUTTON,
.tp_type = WSP_TRACKPAD_TYPE2,
.finger_data_offset = WSP_TYPE2_FINGER_DATA_OFFSET,
},
[WELLSPRING4A] = {
.caps = HAS_INTEGRATED_BUTTON,
.tp_type = WSP_TRACKPAD_TYPE2,
.finger_data_offset = WSP_TYPE2_FINGER_DATA_OFFSET,
},
[WELLSPRING5] = {
.caps = HAS_INTEGRATED_BUTTON,
.tp_type = WSP_TRACKPAD_TYPE2,
.finger_data_offset = WSP_TYPE2_FINGER_DATA_OFFSET,
},
[WELLSPRING6] = {
.caps = HAS_INTEGRATED_BUTTON,
.tp_type = WSP_TRACKPAD_TYPE2,
.finger_data_offset = WSP_TYPE2_FINGER_DATA_OFFSET,
},
[WELLSPRING5A] = {
.caps = HAS_INTEGRATED_BUTTON,
.tp_type = WSP_TRACKPAD_TYPE2,
.finger_data_offset = WSP_TYPE2_FINGER_DATA_OFFSET,
},
[WELLSPRING6A] = {
.caps = HAS_INTEGRATED_BUTTON,
.tp_type = WSP_TRACKPAD_TYPE2,
.finger_data_offset = WSP_TYPE2_FINGER_DATA_OFFSET,
},
[WELLSPRING7] = {
.caps = HAS_INTEGRATED_BUTTON,
.tp_type = WSP_TRACKPAD_TYPE2,
.finger_data_offset = WSP_TYPE2_FINGER_DATA_OFFSET,
},
[WELLSPRING7A] = {
.caps = HAS_INTEGRATED_BUTTON,
.tp_type = WSP_TRACKPAD_TYPE2,
.finger_data_offset = WSP_TYPE2_FINGER_DATA_OFFSET,
},
[WELLSPRING8] = {
.caps = HAS_INTEGRATED_BUTTON,
.tp_type = WSP_TRACKPAD_TYPE3,
.finger_data_offset = WSP_TYPE3_FINGER_DATA_OFFSET,
},
};
#define ATP_DEV(v,p,i) { USB_VPI(USB_VENDOR_##v, USB_PRODUCT_##v##_##p, i) }
/* TODO: STRUCT_USB_HOST_ID */
static const struct usb_device_id wsp_devs[] = {
/* MacbookAir1.1 */
ATP_DEV(APPLE, WELLSPRING_ANSI, WELLSPRING_DRIVER_INFO(WELLSPRING1)),
ATP_DEV(APPLE, WELLSPRING_ISO, WELLSPRING_DRIVER_INFO(WELLSPRING1)),
ATP_DEV(APPLE, WELLSPRING_JIS, WELLSPRING_DRIVER_INFO(WELLSPRING1)),
/* MacbookProPenryn, aka wellspring2 */
ATP_DEV(APPLE, WELLSPRING2_ANSI, WELLSPRING_DRIVER_INFO(WELLSPRING2)),
ATP_DEV(APPLE, WELLSPRING2_ISO, WELLSPRING_DRIVER_INFO(WELLSPRING2)),
ATP_DEV(APPLE, WELLSPRING2_JIS, WELLSPRING_DRIVER_INFO(WELLSPRING2)),
/* Macbook5,1 (unibody), aka wellspring3 */
ATP_DEV(APPLE, WELLSPRING3_ANSI, WELLSPRING_DRIVER_INFO(WELLSPRING3)),
ATP_DEV(APPLE, WELLSPRING3_ISO, WELLSPRING_DRIVER_INFO(WELLSPRING3)),
ATP_DEV(APPLE, WELLSPRING3_JIS, WELLSPRING_DRIVER_INFO(WELLSPRING3)),
/* MacbookAir3,2 (unibody), aka wellspring4 */
ATP_DEV(APPLE, WELLSPRING4_ANSI, WELLSPRING_DRIVER_INFO(WELLSPRING4)),
ATP_DEV(APPLE, WELLSPRING4_ISO, WELLSPRING_DRIVER_INFO(WELLSPRING4)),
ATP_DEV(APPLE, WELLSPRING4_JIS, WELLSPRING_DRIVER_INFO(WELLSPRING4)),
/* MacbookAir3,1 (unibody), aka wellspring4 */
ATP_DEV(APPLE, WELLSPRING4A_ANSI, WELLSPRING_DRIVER_INFO(WELLSPRING4A)),
ATP_DEV(APPLE, WELLSPRING4A_ISO, WELLSPRING_DRIVER_INFO(WELLSPRING4A)),
ATP_DEV(APPLE, WELLSPRING4A_JIS, WELLSPRING_DRIVER_INFO(WELLSPRING4A)),
/* Macbook8 (unibody, March 2011) */
ATP_DEV(APPLE, WELLSPRING5_ANSI, WELLSPRING_DRIVER_INFO(WELLSPRING5)),
ATP_DEV(APPLE, WELLSPRING5_ISO, WELLSPRING_DRIVER_INFO(WELLSPRING5)),
ATP_DEV(APPLE, WELLSPRING5_JIS, WELLSPRING_DRIVER_INFO(WELLSPRING5)),
/* MacbookAir4,1 (unibody, July 2011) */
ATP_DEV(APPLE, WELLSPRING6A_ANSI, WELLSPRING_DRIVER_INFO(WELLSPRING6A)),
ATP_DEV(APPLE, WELLSPRING6A_ISO, WELLSPRING_DRIVER_INFO(WELLSPRING6A)),
ATP_DEV(APPLE, WELLSPRING6A_JIS, WELLSPRING_DRIVER_INFO(WELLSPRING6A)),
/* MacbookAir4,2 (unibody, July 2011) */
ATP_DEV(APPLE, WELLSPRING6_ANSI, WELLSPRING_DRIVER_INFO(WELLSPRING6)),
ATP_DEV(APPLE, WELLSPRING6_ISO, WELLSPRING_DRIVER_INFO(WELLSPRING6)),
ATP_DEV(APPLE, WELLSPRING6_JIS, WELLSPRING_DRIVER_INFO(WELLSPRING6)),
/* Macbook8,2 (unibody) */
ATP_DEV(APPLE, WELLSPRING5A_ANSI, WELLSPRING_DRIVER_INFO(WELLSPRING5A)),
ATP_DEV(APPLE, WELLSPRING5A_ISO, WELLSPRING_DRIVER_INFO(WELLSPRING5A)),
ATP_DEV(APPLE, WELLSPRING5A_JIS, WELLSPRING_DRIVER_INFO(WELLSPRING5A)),
/* MacbookPro10,1 (unibody, June 2012) */
/* MacbookPro11,? (unibody, June 2013) */
ATP_DEV(APPLE, WELLSPRING7_ANSI, WELLSPRING_DRIVER_INFO(WELLSPRING7)),
ATP_DEV(APPLE, WELLSPRING7_ISO, WELLSPRING_DRIVER_INFO(WELLSPRING7)),
ATP_DEV(APPLE, WELLSPRING7_JIS, WELLSPRING_DRIVER_INFO(WELLSPRING7)),
/* MacbookPro10,2 (unibody, October 2012) */
ATP_DEV(APPLE, WELLSPRING7A_ANSI, WELLSPRING_DRIVER_INFO(WELLSPRING7A)),
ATP_DEV(APPLE, WELLSPRING7A_ISO, WELLSPRING_DRIVER_INFO(WELLSPRING7A)),
ATP_DEV(APPLE, WELLSPRING7A_JIS, WELLSPRING_DRIVER_INFO(WELLSPRING7A)),
/* MacbookAir6,2 (unibody, June 2013) */
ATP_DEV(APPLE, WELLSPRING8_ANSI, WELLSPRING_DRIVER_INFO(WELLSPRING8)),
ATP_DEV(APPLE, WELLSPRING8_ISO, WELLSPRING_DRIVER_INFO(WELLSPRING8)),
ATP_DEV(APPLE, WELLSPRING8_JIS, WELLSPRING_DRIVER_INFO(WELLSPRING8)),
};
typedef enum atp_stroke_type {
ATP_STROKE_TOUCH,
ATP_STROKE_SLIDE,
} atp_stroke_type;
typedef enum atp_axis {
X = 0,
Y = 1,
NUM_AXES
} atp_axis;
#define ATP_FIFO_BUF_SIZE 8 /* bytes */
#define ATP_FIFO_QUEUE_MAXLEN 50 /* units */
enum {
ATP_INTR_DT,
ATP_RESET,
ATP_N_TRANSFER,
};
typedef struct fg_stroke_component {
/* Fields encapsulating the pressure-span. */
u_int loc; /* location (scaled) */
u_int cum_pressure; /* cumulative compression */
u_int max_cum_pressure; /* max cumulative compression */
boolean_t matched; /*to track components as they match against pspans.*/
int delta_mickeys; /* change in location (un-smoothened movement)*/
} fg_stroke_component_t;
/*
* The following structure captures a finger contact with the
* touchpad. A stroke comprises two p-span components and some state.
*/
typedef struct atp_stroke {
TAILQ_ENTRY(atp_stroke) entry;
atp_stroke_type type;
uint32_t flags; /* the state of this stroke */
#define ATSF_ZOMBIE 0x1
boolean_t matched; /* to track match against fingers.*/
struct timeval ctime; /* create time; for coincident siblings. */
/*
* Unit: interrupts; we maintain this value in
* addition to 'ctime' in order to avoid the
* expensive call to microtime() at every
* interrupt.
*/
uint32_t age;
/* Location */
int x;
int y;
/* Fields containing information about movement. */
int instantaneous_dx; /* curr. change in X location (un-smoothened) */
int instantaneous_dy; /* curr. change in Y location (un-smoothened) */
int pending_dx; /* cum. of pending short movements */
int pending_dy; /* cum. of pending short movements */
int movement_dx; /* interpreted smoothened movement */
int movement_dy; /* interpreted smoothened movement */
int cum_movement_x; /* cum. horizontal movement */
int cum_movement_y; /* cum. vertical movement */
/*
* The following member is relevant only for fountain-geyser trackpads.
* For these, there is the need to track pressure-spans and cumulative
* pressures for stroke components.
*/
fg_stroke_component_t components[NUM_AXES];
} atp_stroke_t;
struct atp_softc; /* forward declaration */
typedef void (*sensor_data_interpreter_t)(struct atp_softc *sc, u_int len);
struct atp_softc {
device_t sc_dev;
struct usb_device *sc_usb_device;
struct mtx sc_mutex; /* for synchronization */
struct usb_fifo_sc sc_fifo;
#define MODE_LENGTH 8
char sc_mode_bytes[MODE_LENGTH]; /* device mode */
trackpad_family_t sc_family;
const void *sc_params; /* device configuration */
sensor_data_interpreter_t sensor_data_interpreter;
mousehw_t sc_hw;
mousemode_t sc_mode;
mousestatus_t sc_status;
u_int sc_state;
#define ATP_ENABLED 0x01
#define ATP_ZOMBIES_EXIST 0x02
#define ATP_DOUBLE_TAP_DRAG 0x04
#define ATP_VALID 0x08
struct usb_xfer *sc_xfer[ATP_N_TRANSFER];
u_int sc_pollrate;
int sc_fflags;
atp_stroke_t sc_strokes_data[ATP_MAX_STROKES];
TAILQ_HEAD(,atp_stroke) sc_stroke_free;
TAILQ_HEAD(,atp_stroke) sc_stroke_used;
u_int sc_n_strokes;
struct callout sc_callout;
/*
* button status. Set to non-zero if the mouse-button is physically
* pressed. This state variable is exposed through softc to allow
* reap_sibling_zombies to avoid registering taps while the trackpad
* button is pressed.
*/
uint8_t sc_ibtn;
/*
* Time when touch zombies were last reaped; useful for detecting
* double-touch-n-drag.
*/
struct timeval sc_touch_reap_time;
u_int sc_idlecount;
/* Regarding the data transferred from t-pad in USB INTR packets. */
u_int sc_expected_sensor_data_len;
uint8_t sc_sensor_data[ATP_SENSOR_DATA_BUF_MAX] __aligned(4);
int sc_cur_x[FG_MAX_XSENSORS]; /* current sensor readings */
int sc_cur_y[FG_MAX_YSENSORS];
int sc_base_x[FG_MAX_XSENSORS]; /* base sensor readings */
int sc_base_y[FG_MAX_YSENSORS];
int sc_pressure_x[FG_MAX_XSENSORS]; /* computed pressures */
int sc_pressure_y[FG_MAX_YSENSORS];
fg_pspan sc_pspans_x[FG_MAX_PSPANS_PER_AXIS];
fg_pspan sc_pspans_y[FG_MAX_PSPANS_PER_AXIS];
};
/*
* The last byte of the fountain-geyser sensor data contains status bits; the
* following values define the meanings of these bits.
* (only Geyser 3/4)
*/
enum geyser34_status_bits {
FG_STATUS_BUTTON = (uint8_t)0x01, /* The button was pressed */
FG_STATUS_BASE_UPDATE = (uint8_t)0x04, /* Data from an untouched pad.*/
};
typedef enum interface_mode {
RAW_SENSOR_MODE = (uint8_t)0x01,
HID_MODE = (uint8_t)0x08
} interface_mode;
/*
* function prototypes
*/
static usb_fifo_cmd_t atp_start_read;
static usb_fifo_cmd_t atp_stop_read;
static usb_fifo_open_t atp_open;
static usb_fifo_close_t atp_close;
static usb_fifo_ioctl_t atp_ioctl;
static struct usb_fifo_methods atp_fifo_methods = {
.f_open = &atp_open,
.f_close = &atp_close,
.f_ioctl = &atp_ioctl,
.f_start_read = &atp_start_read,
.f_stop_read = &atp_stop_read,
.basename[0] = ATP_DRIVER_NAME,
};
/* device initialization and shutdown */
static usb_error_t atp_set_device_mode(struct atp_softc *, interface_mode);
static void atp_reset_callback(struct usb_xfer *, usb_error_t);
static int atp_enable(struct atp_softc *);
static void atp_disable(struct atp_softc *);
/* sensor interpretation */
static void fg_interpret_sensor_data(struct atp_softc *, u_int);
static void fg_extract_sensor_data(const int8_t *, u_int, atp_axis,
int *, enum fountain_geyser_trackpad_type);
static void fg_get_pressures(int *, const int *, const int *, int);
static void fg_detect_pspans(int *, u_int, u_int, fg_pspan *, u_int *);
static void wsp_interpret_sensor_data(struct atp_softc *, u_int);
/* movement detection */
static boolean_t fg_match_stroke_component(fg_stroke_component_t *,
const fg_pspan *, atp_stroke_type);
static void fg_match_strokes_against_pspans(struct atp_softc *,
atp_axis, fg_pspan *, u_int, u_int);
static boolean_t wsp_match_strokes_against_fingers(struct atp_softc *,
wsp_finger_t *, u_int);
static boolean_t fg_update_strokes(struct atp_softc *, fg_pspan *, u_int,
fg_pspan *, u_int);
static boolean_t wsp_update_strokes(struct atp_softc *,
wsp_finger_t [WSP_MAX_FINGERS], u_int);
static void fg_add_stroke(struct atp_softc *, const fg_pspan *, const fg_pspan *);
static void fg_add_new_strokes(struct atp_softc *, fg_pspan *,
u_int, fg_pspan *, u_int);
static void wsp_add_stroke(struct atp_softc *, const wsp_finger_t *);
static void atp_advance_stroke_state(struct atp_softc *,
atp_stroke_t *, boolean_t *);
static boolean_t atp_stroke_has_small_movement(const atp_stroke_t *);
static void atp_update_pending_mickeys(atp_stroke_t *);
static boolean_t atp_compute_stroke_movement(atp_stroke_t *);
static void atp_terminate_stroke(struct atp_softc *, atp_stroke_t *);
/* tap detection */
static boolean_t atp_is_horizontal_scroll(const atp_stroke_t *);
static boolean_t atp_is_vertical_scroll(const atp_stroke_t *);
static void atp_reap_sibling_zombies(void *);
static void atp_convert_to_slide(struct atp_softc *, atp_stroke_t *);
/* updating fifo */
static void atp_reset_buf(struct atp_softc *);
static void atp_add_to_queue(struct atp_softc *, int, int, int, uint32_t);
/* Device methods. */
static device_probe_t atp_probe;
static device_attach_t atp_attach;
static device_detach_t atp_detach;
static usb_callback_t atp_intr;
static const struct usb_config atp_xfer_config[ATP_N_TRANSFER] = {
[ATP_INTR_DT] = {
.type = UE_INTERRUPT,
.endpoint = UE_ADDR_ANY,
.direction = UE_DIR_IN,
.flags = {
.pipe_bof = 1, /* block pipe on failure */
.short_xfer_ok = 1,
},
.bufsize = ATP_SENSOR_DATA_BUF_MAX,
.callback = &atp_intr,
},
[ATP_RESET] = {
.type = UE_CONTROL,
.endpoint = 0, /* Control pipe */
.direction = UE_DIR_ANY,
.bufsize = sizeof(struct usb_device_request) + MODE_LENGTH,
.callback = &atp_reset_callback,
.interval = 0, /* no pre-delay */
},
};
static atp_stroke_t *
atp_alloc_stroke(struct atp_softc *sc)
{
atp_stroke_t *pstroke;
pstroke = TAILQ_FIRST(&sc->sc_stroke_free);
if (pstroke == NULL)
goto done;
TAILQ_REMOVE(&sc->sc_stroke_free, pstroke, entry);
memset(pstroke, 0, sizeof(*pstroke));
TAILQ_INSERT_TAIL(&sc->sc_stroke_used, pstroke, entry);
sc->sc_n_strokes++;
done:
return (pstroke);
}
static void
atp_free_stroke(struct atp_softc *sc, atp_stroke_t *pstroke)
{
if (pstroke == NULL)
return;
sc->sc_n_strokes--;
TAILQ_REMOVE(&sc->sc_stroke_used, pstroke, entry);
TAILQ_INSERT_TAIL(&sc->sc_stroke_free, pstroke, entry);
}
static void
atp_init_stroke_pool(struct atp_softc *sc)
{
u_int x;
TAILQ_INIT(&sc->sc_stroke_free);
TAILQ_INIT(&sc->sc_stroke_used);
sc->sc_n_strokes = 0;
memset(&sc->sc_strokes_data, 0, sizeof(sc->sc_strokes_data));
for (x = 0; x != ATP_MAX_STROKES; x++) {
TAILQ_INSERT_TAIL(&sc->sc_stroke_free, &sc->sc_strokes_data[x],
entry);
}
}
static usb_error_t
atp_set_device_mode(struct atp_softc *sc, interface_mode newMode)
{
uint8_t mode_value;
usb_error_t err;
if ((newMode != RAW_SENSOR_MODE) && (newMode != HID_MODE))
return (USB_ERR_INVAL);
if ((newMode == RAW_SENSOR_MODE) &&
(sc->sc_family == TRACKPAD_FAMILY_FOUNTAIN_GEYSER))
mode_value = (uint8_t)0x04;
else
mode_value = newMode;
err = usbd_req_get_report(sc->sc_usb_device, NULL /* mutex */,
sc->sc_mode_bytes, sizeof(sc->sc_mode_bytes), 0 /* interface idx */,
0x03 /* type */, 0x00 /* id */);
if (err != USB_ERR_NORMAL_COMPLETION) {
DPRINTF("Failed to read device mode (%d)\n", err);
return (err);
}
if (sc->sc_mode_bytes[0] == mode_value)
return (err);
/*
* XXX Need to wait at least 250ms for hardware to get
* ready. The device mode handling appears to be handled
* asynchronously and we should not issue these commands too
* quickly.
*/
pause("WHW", hz / 4);
sc->sc_mode_bytes[0] = mode_value;
return (usbd_req_set_report(sc->sc_usb_device, NULL /* mutex */,
sc->sc_mode_bytes, sizeof(sc->sc_mode_bytes), 0 /* interface idx */,
0x03 /* type */, 0x00 /* id */));
}
static void
atp_reset_callback(struct usb_xfer *xfer, usb_error_t error)
{
usb_device_request_t req;
struct usb_page_cache *pc;
struct atp_softc *sc = usbd_xfer_softc(xfer);
uint8_t mode_value;
if (sc->sc_family == TRACKPAD_FAMILY_FOUNTAIN_GEYSER)
mode_value = 0x04;
else
mode_value = RAW_SENSOR_MODE;
switch (USB_GET_STATE(xfer)) {
case USB_ST_SETUP:
sc->sc_mode_bytes[0] = mode_value;
req.bmRequestType = UT_WRITE_CLASS_INTERFACE;
req.bRequest = UR_SET_REPORT;
USETW2(req.wValue,
(uint8_t)0x03 /* type */, (uint8_t)0x00 /* id */);
USETW(req.wIndex, 0);
USETW(req.wLength, MODE_LENGTH);
pc = usbd_xfer_get_frame(xfer, 0);
usbd_copy_in(pc, 0, &req, sizeof(req));
pc = usbd_xfer_get_frame(xfer, 1);
usbd_copy_in(pc, 0, sc->sc_mode_bytes, MODE_LENGTH);
usbd_xfer_set_frame_len(xfer, 0, sizeof(req));
usbd_xfer_set_frame_len(xfer, 1, MODE_LENGTH);
usbd_xfer_set_frames(xfer, 2);
usbd_transfer_submit(xfer);
break;
case USB_ST_TRANSFERRED:
default:
break;
}
}
static int
atp_enable(struct atp_softc *sc)
{
if (sc->sc_state & ATP_ENABLED)
return (0);
/* reset status */
memset(&sc->sc_status, 0, sizeof(sc->sc_status));
atp_init_stroke_pool(sc);
sc->sc_state |= ATP_ENABLED;
DPRINTFN(ATP_LLEVEL_INFO, "enabled atp\n");
return (0);
}
static void
atp_disable(struct atp_softc *sc)
{
sc->sc_state &= ~(ATP_ENABLED | ATP_VALID);
DPRINTFN(ATP_LLEVEL_INFO, "disabled atp\n");
}
static void
fg_interpret_sensor_data(struct atp_softc *sc, u_int data_len)
{
u_int n_xpspans = 0;
u_int n_ypspans = 0;
uint8_t status_bits;
const struct fg_dev_params *params =
(const struct fg_dev_params *)sc->sc_params;
fg_extract_sensor_data(sc->sc_sensor_data, params->n_xsensors, X,
sc->sc_cur_x, params->prot);
fg_extract_sensor_data(sc->sc_sensor_data, params->n_ysensors, Y,
sc->sc_cur_y, params->prot);
/*
* If this is the initial update (from an untouched
* pad), we should set the base values for the sensor
* data; deltas with respect to these base values can
* be used as pressure readings subsequently.
*/
status_bits = sc->sc_sensor_data[params->data_len - 1];
if (((params->prot == FG_TRACKPAD_TYPE_GEYSER3) ||
(params->prot == FG_TRACKPAD_TYPE_GEYSER4)) &&
((sc->sc_state & ATP_VALID) == 0)) {
if (status_bits & FG_STATUS_BASE_UPDATE) {
memcpy(sc->sc_base_x, sc->sc_cur_x,
params->n_xsensors * sizeof(*sc->sc_base_x));
memcpy(sc->sc_base_y, sc->sc_cur_y,
params->n_ysensors * sizeof(*sc->sc_base_y));
sc->sc_state |= ATP_VALID;
return;
}
}
/* Get pressure readings and detect p-spans for both axes. */
fg_get_pressures(sc->sc_pressure_x, sc->sc_cur_x, sc->sc_base_x,
params->n_xsensors);
fg_detect_pspans(sc->sc_pressure_x, params->n_xsensors,
FG_MAX_PSPANS_PER_AXIS, sc->sc_pspans_x, &n_xpspans);
fg_get_pressures(sc->sc_pressure_y, sc->sc_cur_y, sc->sc_base_y,
params->n_ysensors);
fg_detect_pspans(sc->sc_pressure_y, params->n_ysensors,
FG_MAX_PSPANS_PER_AXIS, sc->sc_pspans_y, &n_ypspans);
/* Update strokes with new pspans to detect movements. */
if (fg_update_strokes(sc, sc->sc_pspans_x, n_xpspans, sc->sc_pspans_y, n_ypspans))
sc->sc_status.flags |= MOUSE_POSCHANGED;
sc->sc_ibtn = (status_bits & FG_STATUS_BUTTON) ? MOUSE_BUTTON1DOWN : 0;
sc->sc_status.button = sc->sc_ibtn;
/*
* The Fountain/Geyser device continues to trigger interrupts
* at a fast rate even after touchpad activity has
* stopped. Upon detecting that the device has remained idle
* beyond a threshold, we reinitialize it to silence the
* interrupts.
*/
if ((sc->sc_status.flags == 0) && (sc->sc_n_strokes == 0)) {
sc->sc_idlecount++;
if (sc->sc_idlecount >= ATP_IDLENESS_THRESHOLD) {
/*
* Use the last frame before we go idle for
* calibration on pads which do not send
* calibration frames.
*/
const struct fg_dev_params *params =
(const struct fg_dev_params *)sc->sc_params;
DPRINTFN(ATP_LLEVEL_INFO, "idle\n");
if (params->prot < FG_TRACKPAD_TYPE_GEYSER3) {
memcpy(sc->sc_base_x, sc->sc_cur_x,
params->n_xsensors * sizeof(*(sc->sc_base_x)));
memcpy(sc->sc_base_y, sc->sc_cur_y,
params->n_ysensors * sizeof(*(sc->sc_base_y)));
}
sc->sc_idlecount = 0;
usbd_transfer_start(sc->sc_xfer[ATP_RESET]);
}
} else {
sc->sc_idlecount = 0;
}
}
/*
* Interpret the data from the X and Y pressure sensors. This function
* is called separately for the X and Y sensor arrays. The data in the
* USB packet is laid out in the following manner:
*
* sensor_data:
* --,--,Y1,Y2,--,Y3,Y4,--,Y5,...,Y10, ... X1,X2,--,X3,X4
* indices: 0 1 2 3 4 5 6 7 8 ... 15 ... 20 21 22 23 24
*
* '--' (in the above) indicates that the value is unimportant.
*
* Information about the above layout was obtained from the
* implementation of the AppleTouch driver in Linux.
*
* parameters:
* sensor_data
* raw sensor data from the USB packet.
* num
* The number of elements in the array 'arr'.
* axis
* Axis of data to fetch
* arr
* The array to be initialized with the readings.
* prot
* The protocol to use to interpret the data
*/
static void
fg_extract_sensor_data(const int8_t *sensor_data, u_int num, atp_axis axis,
int *arr, enum fountain_geyser_trackpad_type prot)
{
u_int i;
u_int di; /* index into sensor data */
switch (prot) {
case FG_TRACKPAD_TYPE_GEYSER1:
/*
* For Geyser 1, the sensors are laid out in pairs
* every 5 bytes.
*/
for (i = 0, di = (axis == Y) ? 1 : 2; i < 8; di += 5, i++) {
arr[i] = sensor_data[di];
arr[i+8] = sensor_data[di+2];
if ((axis == X) && (num > 16))
arr[i+16] = sensor_data[di+40];
}
break;
case FG_TRACKPAD_TYPE_GEYSER2:
for (i = 0, di = (axis == Y) ? 1 : 19; i < num; /* empty */ ) {
arr[i++] = sensor_data[di++];
arr[i++] = sensor_data[di++];
di++;
}
break;
case FG_TRACKPAD_TYPE_GEYSER3:
case FG_TRACKPAD_TYPE_GEYSER4:
for (i = 0, di = (axis == Y) ? 2 : 20; i < num; /* empty */ ) {
arr[i++] = sensor_data[di++];
arr[i++] = sensor_data[di++];
di++;
}
break;
default:
break;
}
}
static void
fg_get_pressures(int *p, const int *cur, const int *base, int n)
{
int i;
for (i = 0; i < n; i++) {
p[i] = cur[i] - base[i];
if (p[i] > 127)
p[i] -= 256;
if (p[i] < -127)
p[i] += 256;
if (p[i] < 0)
p[i] = 0;
/*
* Shave off pressures below the noise-pressure
* threshold; this will reduce the contribution from
* lower pressure readings.
*/
if ((u_int)p[i] <= FG_SENSOR_NOISE_THRESHOLD)
p[i] = 0; /* filter away noise */
else
p[i] -= FG_SENSOR_NOISE_THRESHOLD;
}
}
static void
fg_detect_pspans(int *p, u_int num_sensors,
u_int max_spans, /* max # of pspans permitted */
fg_pspan *spans, /* finger spans */
u_int *nspans_p) /* num spans detected */
{
u_int i;
int maxp; /* max pressure seen within a span */
u_int num_spans = 0;
enum fg_pspan_state {
ATP_PSPAN_INACTIVE,
ATP_PSPAN_INCREASING,
ATP_PSPAN_DECREASING,
} state; /* state of the pressure span */
/*
* The following is a simple state machine to track
* the phase of the pressure span.
*/
memset(spans, 0, max_spans * sizeof(fg_pspan));
maxp = 0;
state = ATP_PSPAN_INACTIVE;
for (i = 0; i < num_sensors; i++) {
if (num_spans >= max_spans)
break;
if (p[i] == 0) {
if (state == ATP_PSPAN_INACTIVE) {
/*
* There is no pressure information for this
* sensor, and we aren't tracking a finger.
*/
continue;
} else {
state = ATP_PSPAN_INACTIVE;
maxp = 0;
num_spans++;
}
} else {
switch (state) {
case ATP_PSPAN_INACTIVE:
state = ATP_PSPAN_INCREASING;
maxp = p[i];
break;
case ATP_PSPAN_INCREASING:
if (p[i] > maxp)
maxp = p[i];
else if (p[i] <= (maxp >> 1))
state = ATP_PSPAN_DECREASING;
break;
case ATP_PSPAN_DECREASING:
if (p[i] > p[i - 1]) {
/*
* This is the beginning of
* another span; change state
* to give the appearance that
* we're starting from an
* inactive span, and then
* re-process this reading in
* the next iteration.
*/
num_spans++;
state = ATP_PSPAN_INACTIVE;
maxp = 0;
i--;
continue;
}
break;
}
/* Update the finger span with this reading. */
spans[num_spans].width++;
spans[num_spans].cum += p[i];
spans[num_spans].cog += p[i] * (i + 1);
}
}
if (state != ATP_PSPAN_INACTIVE)
num_spans++; /* close the last finger span */
/* post-process the spans */
for (i = 0; i < num_spans; i++) {
/* filter away unwanted pressure spans */
if ((spans[i].cum < FG_PSPAN_MIN_CUM_PRESSURE) ||
(spans[i].width > FG_PSPAN_MAX_WIDTH)) {
if ((i + 1) < num_spans) {
memcpy(&spans[i], &spans[i + 1],
(num_spans - i - 1) * sizeof(fg_pspan));
i--;
}
num_spans--;
continue;
}
/* compute this span's representative location */
spans[i].loc = spans[i].cog * FG_SCALE_FACTOR /
spans[i].cum;
spans[i].matched = false; /* not yet matched against a stroke */
}
*nspans_p = num_spans;
}
static void
wsp_interpret_sensor_data(struct atp_softc *sc, u_int data_len)
{
const struct wsp_dev_params *params = sc->sc_params;
wsp_finger_t fingers[WSP_MAX_FINGERS];
struct wsp_finger_sensor_data *source_fingerp;
u_int n_source_fingers;
u_int n_fingers;
u_int i;
/* validate sensor data length */
if ((data_len < params->finger_data_offset) ||
((data_len - params->finger_data_offset) %
WSP_SIZEOF_FINGER_SENSOR_DATA) != 0)
return;
/* compute number of source fingers */
n_source_fingers = (data_len - params->finger_data_offset) /
WSP_SIZEOF_FINGER_SENSOR_DATA;
if (n_source_fingers > WSP_MAX_FINGERS)
n_source_fingers = WSP_MAX_FINGERS;
/* iterate over the source data collecting useful fingers */
n_fingers = 0;
source_fingerp = (struct wsp_finger_sensor_data *)(sc->sc_sensor_data +
params->finger_data_offset);
for (i = 0; i < n_source_fingers; i++, source_fingerp++) {
/* swap endianness, if any */
if (le16toh(0x1234) != 0x1234) {
source_fingerp->origin = le16toh((uint16_t)source_fingerp->origin);
source_fingerp->abs_x = le16toh((uint16_t)source_fingerp->abs_x);
source_fingerp->abs_y = le16toh((uint16_t)source_fingerp->abs_y);
source_fingerp->rel_x = le16toh((uint16_t)source_fingerp->rel_x);
source_fingerp->rel_y = le16toh((uint16_t)source_fingerp->rel_y);
source_fingerp->tool_major = le16toh((uint16_t)source_fingerp->tool_major);
source_fingerp->tool_minor = le16toh((uint16_t)source_fingerp->tool_minor);
source_fingerp->orientation = le16toh((uint16_t)source_fingerp->orientation);
source_fingerp->touch_major = le16toh((uint16_t)source_fingerp->touch_major);
source_fingerp->touch_minor = le16toh((uint16_t)source_fingerp->touch_minor);
source_fingerp->multi = le16toh((uint16_t)source_fingerp->multi);
}
/* check for minium threshold */
if (source_fingerp->touch_major == 0)
continue;
fingers[n_fingers].matched = false;
fingers[n_fingers].x = source_fingerp->abs_x;
fingers[n_fingers].y = -source_fingerp->abs_y;
n_fingers++;
}
if ((sc->sc_n_strokes == 0) && (n_fingers == 0))
return;
if (wsp_update_strokes(sc, fingers, n_fingers))
sc->sc_status.flags |= MOUSE_POSCHANGED;
switch(params->tp_type) {
case WSP_TRACKPAD_TYPE2:
sc->sc_ibtn = sc->sc_sensor_data[WSP_TYPE2_BUTTON_DATA_OFFSET];
break;
case WSP_TRACKPAD_TYPE3:
sc->sc_ibtn = sc->sc_sensor_data[WSP_TYPE3_BUTTON_DATA_OFFSET];
break;
default:
break;
}
sc->sc_status.button = sc->sc_ibtn ? MOUSE_BUTTON1DOWN : 0;
}
/*
* Match a pressure-span against a stroke-component. If there is a
* match, update the component's state and return true.
*/
static boolean_t
fg_match_stroke_component(fg_stroke_component_t *component,
const fg_pspan *pspan, atp_stroke_type stroke_type)
{
int delta_mickeys;
u_int min_pressure;
delta_mickeys = pspan->loc - component->loc;
if (abs(delta_mickeys) > (int)FG_MAX_DELTA_MICKEYS)
return (false); /* the finger span is too far out; no match */
component->loc = pspan->loc;
/*
* A sudden and significant increase in a pspan's cumulative
* pressure indicates the incidence of a new finger
* contact. This usually revises the pspan's
* centre-of-gravity, and hence the location of any/all
* matching stroke component(s). But such a change should
* *not* be interpreted as a movement.
*/
if (pspan->cum > ((3 * component->cum_pressure) >> 1))
delta_mickeys = 0;
component->cum_pressure = pspan->cum;
if (pspan->cum > component->max_cum_pressure)
component->max_cum_pressure = pspan->cum;
/*
* Disregard the component's movement if its cumulative
* pressure drops below a fraction of the maximum; this
* fraction is determined based on the stroke's type.
*/
if (stroke_type == ATP_STROKE_TOUCH)
min_pressure = (3 * component->max_cum_pressure) >> 2;
else
min_pressure = component->max_cum_pressure >> 2;
if (component->cum_pressure < min_pressure)
delta_mickeys = 0;
component->delta_mickeys = delta_mickeys;
return (true);
}
static void
fg_match_strokes_against_pspans(struct atp_softc *sc, atp_axis axis,
fg_pspan *pspans, u_int n_pspans, u_int repeat_count)
{
atp_stroke_t *strokep;
u_int repeat_index = 0;
u_int i;
/* Determine the index of the multi-span. */
if (repeat_count) {
for (i = 0; i < n_pspans; i++) {
if (pspans[i].cum > pspans[repeat_index].cum)
repeat_index = i;
}
}
TAILQ_FOREACH(strokep, &sc->sc_stroke_used, entry) {
if (strokep->components[axis].matched)
continue; /* skip matched components */
for (i = 0; i < n_pspans; i++) {
if (pspans[i].matched)
continue; /* skip matched pspans */
if (fg_match_stroke_component(
&strokep->components[axis], &pspans[i],
strokep->type)) {
/* There is a match. */
strokep->components[axis].matched = true;
/* Take care to repeat at the multi-span. */
if ((repeat_count > 0) && (i == repeat_index))
repeat_count--;
else
pspans[i].matched = true;
break; /* skip to the next strokep */
}
} /* loop over pspans */
} /* loop over strokes */
}
static boolean_t
wsp_match_strokes_against_fingers(struct atp_softc *sc,
wsp_finger_t *fingers, u_int n_fingers)
{
boolean_t movement = false;
atp_stroke_t *strokep;
u_int i;
/* reset the matched status for all strokes */
TAILQ_FOREACH(strokep, &sc->sc_stroke_used, entry)
strokep->matched = false;
for (i = 0; i != n_fingers; i++) {
u_int least_distance_sq = WSP_MAX_ALLOWED_MATCH_DISTANCE_SQ;
atp_stroke_t *strokep_best = NULL;
TAILQ_FOREACH(strokep, &sc->sc_stroke_used, entry) {
int instantaneous_dx;
int instantaneous_dy;
u_int d_squared;
if (strokep->matched)
continue;
instantaneous_dx = fingers[i].x - strokep->x;
instantaneous_dy = fingers[i].y - strokep->y;
/* skip strokes which are far away */
d_squared =
(instantaneous_dx * instantaneous_dx) +
(instantaneous_dy * instantaneous_dy);
if (d_squared < least_distance_sq) {
least_distance_sq = d_squared;
strokep_best = strokep;
}
}
strokep = strokep_best;
if (strokep != NULL) {
fingers[i].matched = true;
strokep->matched = true;
strokep->instantaneous_dx = fingers[i].x - strokep->x;
strokep->instantaneous_dy = fingers[i].y - strokep->y;
strokep->x = fingers[i].x;
strokep->y = fingers[i].y;
atp_advance_stroke_state(sc, strokep, &movement);
}
}
return (movement);
}
/*
* Update strokes by matching against current pressure-spans.
* Return true if any movement is detected.
*/
static boolean_t
fg_update_strokes(struct atp_softc *sc, fg_pspan *pspans_x,
u_int n_xpspans, fg_pspan *pspans_y, u_int n_ypspans)
{
atp_stroke_t *strokep;
atp_stroke_t *strokep_next;
boolean_t movement = false;
u_int repeat_count = 0;
u_int i;
u_int j;
/* Reset X and Y components of all strokes as unmatched. */
TAILQ_FOREACH(strokep, &sc->sc_stroke_used, entry) {
strokep->components[X].matched = false;
strokep->components[Y].matched = false;
}
/*
* Usually, the X and Y pspans come in pairs (the common case
* being a single pair). It is possible, however, that
* multiple contacts resolve to a single pspan along an
* axis, as illustrated in the following:
*
* F = finger-contact
*
* pspan pspan
* +-----------------------+
* | . . |
* | . . |
* | . . |
* | . . |
* pspan |.........F......F |
* | |
* | |
* | |
* +-----------------------+
*
*
* The above case can be detected by a difference in the
* number of X and Y pspans. When this happens, X and Y pspans
* aren't easy to pair or match against strokes.
*
* When X and Y pspans differ in number, the axis with the
* smaller number of pspans is regarded as having a repeating
* pspan (or a multi-pspan)--in the above illustration, the
* Y-axis has a repeating pspan. Our approach is to try to
* match the multi-pspan repeatedly against strokes. The
* difference between the number of X and Y pspans gives us a
* crude repeat_count for matching multi-pspans--i.e. the
* multi-pspan along the Y axis (above) has a repeat_count of 1.
*/
repeat_count = abs(n_xpspans - n_ypspans);
fg_match_strokes_against_pspans(sc, X, pspans_x, n_xpspans,
(((repeat_count != 0) && ((n_xpspans < n_ypspans))) ?
repeat_count : 0));
fg_match_strokes_against_pspans(sc, Y, pspans_y, n_ypspans,
(((repeat_count != 0) && (n_ypspans < n_xpspans)) ?
repeat_count : 0));
/* Update the state of strokes based on the above pspan matches. */
TAILQ_FOREACH_SAFE(strokep, &sc->sc_stroke_used, entry, strokep_next) {
if (strokep->components[X].matched &&
strokep->components[Y].matched) {
strokep->matched = true;
strokep->instantaneous_dx =
strokep->components[X].delta_mickeys;
strokep->instantaneous_dy =
strokep->components[Y].delta_mickeys;
atp_advance_stroke_state(sc, strokep, &movement);
} else {
/*
* At least one component of this stroke
* didn't match against current pspans;
* terminate it.
*/
atp_terminate_stroke(sc, strokep);
}
}
/* Add new strokes for pairs of unmatched pspans */
for (i = 0; i < n_xpspans; i++) {
if (pspans_x[i].matched == false) break;
}
for (j = 0; j < n_ypspans; j++) {
if (pspans_y[j].matched == false) break;
}
if ((i < n_xpspans) && (j < n_ypspans)) {
#ifdef USB_DEBUG
if (atp_debug >= ATP_LLEVEL_INFO) {
printf("unmatched pspans:");
for (; i < n_xpspans; i++) {
if (pspans_x[i].matched)
continue;
printf(" X:[loc:%u,cum:%u]",
pspans_x[i].loc, pspans_x[i].cum);
}
for (; j < n_ypspans; j++) {
if (pspans_y[j].matched)
continue;
printf(" Y:[loc:%u,cum:%u]",
pspans_y[j].loc, pspans_y[j].cum);
}
printf("\n");
}
#endif /* USB_DEBUG */
if ((n_xpspans == 1) && (n_ypspans == 1))
/* The common case of a single pair of new pspans. */
fg_add_stroke(sc, &pspans_x[0], &pspans_y[0]);
else
fg_add_new_strokes(sc, pspans_x, n_xpspans,
pspans_y, n_ypspans);
}
#ifdef USB_DEBUG
if (atp_debug >= ATP_LLEVEL_INFO) {
TAILQ_FOREACH(strokep, &sc->sc_stroke_used, entry) {
printf(" %s%clc:%u,dm:%d,cum:%d,max:%d,%c"
",%clc:%u,dm:%d,cum:%d,max:%d,%c",
(strokep->flags & ATSF_ZOMBIE) ? "zomb:" : "",
(strokep->type == ATP_STROKE_TOUCH) ? '[' : '<',
strokep->components[X].loc,
strokep->components[X].delta_mickeys,
strokep->components[X].cum_pressure,
strokep->components[X].max_cum_pressure,
(strokep->type == ATP_STROKE_TOUCH) ? ']' : '>',
(strokep->type == ATP_STROKE_TOUCH) ? '[' : '<',
strokep->components[Y].loc,
strokep->components[Y].delta_mickeys,
strokep->components[Y].cum_pressure,
strokep->components[Y].max_cum_pressure,
(strokep->type == ATP_STROKE_TOUCH) ? ']' : '>');
}
if (TAILQ_FIRST(&sc->sc_stroke_used) != NULL)
printf("\n");
}
#endif /* USB_DEBUG */
return (movement);
}
/*
* Update strokes by matching against current pressure-spans.
* Return true if any movement is detected.
*/
static boolean_t
wsp_update_strokes(struct atp_softc *sc, wsp_finger_t *fingers, u_int n_fingers)
{
boolean_t movement = false;
atp_stroke_t *strokep_next;
atp_stroke_t *strokep;
u_int i;
if (sc->sc_n_strokes > 0) {
movement = wsp_match_strokes_against_fingers(
sc, fingers, n_fingers);
/* handle zombie strokes */
TAILQ_FOREACH_SAFE(strokep, &sc->sc_stroke_used, entry, strokep_next) {
if (strokep->matched)
continue;
atp_terminate_stroke(sc, strokep);
}
}
/* initialize unmatched fingers as strokes */
for (i = 0; i != n_fingers; i++) {
if (fingers[i].matched)
continue;
wsp_add_stroke(sc, fingers + i);
}
return (movement);
}
/* Initialize a stroke using a pressure-span. */
static void
fg_add_stroke(struct atp_softc *sc, const fg_pspan *pspan_x,
const fg_pspan *pspan_y)
{
atp_stroke_t *strokep;
strokep = atp_alloc_stroke(sc);
if (strokep == NULL)
return;
/*
* Strokes begin as potential touches. If a stroke survives
* longer than a threshold, or if it records significant
* cumulative movement, then it is considered a 'slide'.
*/
strokep->type = ATP_STROKE_TOUCH;
strokep->matched = false;
microtime(&strokep->ctime);
strokep->age = 1; /* number of interrupts */
strokep->x = pspan_x->loc;
strokep->y = pspan_y->loc;
strokep->components[X].loc = pspan_x->loc;
strokep->components[X].cum_pressure = pspan_x->cum;
strokep->components[X].max_cum_pressure = pspan_x->cum;
strokep->components[X].matched = true;
strokep->components[Y].loc = pspan_y->loc;
strokep->components[Y].cum_pressure = pspan_y->cum;
strokep->components[Y].max_cum_pressure = pspan_y->cum;
strokep->components[Y].matched = true;
if (sc->sc_n_strokes > 1) {
/* Reset double-tap-n-drag if we have more than one strokes. */
sc->sc_state &= ~ATP_DOUBLE_TAP_DRAG;
}
DPRINTFN(ATP_LLEVEL_INFO, "[%u,%u], time: %u,%ld\n",
strokep->components[X].loc,
strokep->components[Y].loc,
(u_int)strokep->ctime.tv_sec,
(unsigned long int)strokep->ctime.tv_usec);
}
static void
fg_add_new_strokes(struct atp_softc *sc, fg_pspan *pspans_x,
u_int n_xpspans, fg_pspan *pspans_y, u_int n_ypspans)
{
fg_pspan spans[2][FG_MAX_PSPANS_PER_AXIS];
u_int nspans[2];
u_int i;
u_int j;
/* Copy unmatched pspans into the local arrays. */
for (i = 0, nspans[X] = 0; i < n_xpspans; i++) {
if (pspans_x[i].matched == false) {
spans[X][nspans[X]] = pspans_x[i];
nspans[X]++;
}
}
for (j = 0, nspans[Y] = 0; j < n_ypspans; j++) {
if (pspans_y[j].matched == false) {
spans[Y][nspans[Y]] = pspans_y[j];
nspans[Y]++;
}
}
if (nspans[X] == nspans[Y]) {
/* Create new strokes from pairs of unmatched pspans */
for (i = 0, j = 0; (i < nspans[X]) && (j < nspans[Y]); i++, j++)
fg_add_stroke(sc, &spans[X][i], &spans[Y][j]);
} else {
u_int cum = 0;
atp_axis repeat_axis; /* axis with multi-pspans */
u_int repeat_count; /* repeat count for the multi-pspan*/
u_int repeat_index = 0; /* index of the multi-span */
repeat_axis = (nspans[X] > nspans[Y]) ? Y : X;
repeat_count = abs(nspans[X] - nspans[Y]);
for (i = 0; i < nspans[repeat_axis]; i++) {
if (spans[repeat_axis][i].cum > cum) {
repeat_index = i;
cum = spans[repeat_axis][i].cum;
}
}
/* Create new strokes from pairs of unmatched pspans */
i = 0, j = 0;
for (; (i < nspans[X]) && (j < nspans[Y]); i++, j++) {
fg_add_stroke(sc, &spans[X][i], &spans[Y][j]);
/* Take care to repeat at the multi-pspan. */
if (repeat_count > 0) {
if ((repeat_axis == X) &&
(repeat_index == i)) {
i--; /* counter loop increment */
repeat_count--;
} else if ((repeat_axis == Y) &&
(repeat_index == j)) {
j--; /* counter loop increment */
repeat_count--;
}
}
}
}
}
/* Initialize a stroke from an unmatched finger. */
static void
wsp_add_stroke(struct atp_softc *sc, const wsp_finger_t *fingerp)
{
atp_stroke_t *strokep;
strokep = atp_alloc_stroke(sc);
if (strokep == NULL)
return;
/*
* Strokes begin as potential touches. If a stroke survives
* longer than a threshold, or if it records significant
* cumulative movement, then it is considered a 'slide'.
*/
strokep->type = ATP_STROKE_TOUCH;
strokep->matched = true;
microtime(&strokep->ctime);
strokep->age = 1; /* number of interrupts */
strokep->x = fingerp->x;
strokep->y = fingerp->y;
/* Reset double-tap-n-drag if we have more than one strokes. */
if (sc->sc_n_strokes > 1)
sc->sc_state &= ~ATP_DOUBLE_TAP_DRAG;
DPRINTFN(ATP_LLEVEL_INFO, "[%d,%d]\n", strokep->x, strokep->y);
}
static void
atp_advance_stroke_state(struct atp_softc *sc, atp_stroke_t *strokep,
boolean_t *movementp)
{
/* Revitalize stroke if it had previously been marked as a zombie. */
if (strokep->flags & ATSF_ZOMBIE)
strokep->flags &= ~ATSF_ZOMBIE;
strokep->age++;
if (strokep->age <= atp_stroke_maturity_threshold) {
/* Avoid noise from immature strokes. */
strokep->instantaneous_dx = 0;
strokep->instantaneous_dy = 0;
}
if (atp_compute_stroke_movement(strokep))
*movementp = true;
if (strokep->type != ATP_STROKE_TOUCH)
return;
/* Convert touch strokes to slides upon detecting movement or age. */
if ((abs(strokep->cum_movement_x) > atp_slide_min_movement) ||
(abs(strokep->cum_movement_y) > atp_slide_min_movement))
atp_convert_to_slide(sc, strokep);
else {
/* Compute the stroke's age. */
struct timeval tdiff;
getmicrotime(&tdiff);
if (timevalcmp(&tdiff, &strokep->ctime, >)) {
timevalsub(&tdiff, &strokep->ctime);
if ((tdiff.tv_sec > (atp_touch_timeout / 1000000)) ||
((tdiff.tv_sec == (atp_touch_timeout / 1000000)) &&
(tdiff.tv_usec >= (atp_touch_timeout % 1000000))))
atp_convert_to_slide(sc, strokep);
}
}
}
static boolean_t
atp_stroke_has_small_movement(const atp_stroke_t *strokep)
{
return (((u_int)abs(strokep->instantaneous_dx) <=
atp_small_movement_threshold) &&
((u_int)abs(strokep->instantaneous_dy) <=
atp_small_movement_threshold));
}
/*
* Accumulate instantaneous changes into the stroke's 'pending' bucket; if
* the aggregate exceeds the small_movement_threshold, then retain
* instantaneous changes for later.
*/
static void
atp_update_pending_mickeys(atp_stroke_t *strokep)
{
/* accumulate instantaneous movement */
strokep->pending_dx += strokep->instantaneous_dx;
strokep->pending_dy += strokep->instantaneous_dy;
#define UPDATE_INSTANTANEOUS_AND_PENDING(I, P) \
if (abs((P)) <= atp_small_movement_threshold) \
(I) = 0; /* clobber small movement */ \
else { \
if ((I) > 0) { \
/* \
* Round up instantaneous movement to the nearest \
* ceiling. This helps preserve small mickey \
* movements from being lost in following scaling \
* operation. \
*/ \
(I) = (((I) + (atp_mickeys_scale_factor - 1)) / \
atp_mickeys_scale_factor) * \
atp_mickeys_scale_factor; \
\
/* \
* Deduct the rounded mickeys from pending mickeys. \
* Note: we multiply by 2 to offset the previous \
* accumulation of instantaneous movement into \
* pending. \
*/ \
(P) -= ((I) << 1); \
\
/* truncate pending to 0 if it becomes negative. */ \
(P) = imax((P), 0); \
} else { \
/* \
* Round down instantaneous movement to the nearest \
* ceiling. This helps preserve small mickey \
* movements from being lost in following scaling \
* operation. \
*/ \
(I) = (((I) - (atp_mickeys_scale_factor - 1)) / \
atp_mickeys_scale_factor) * \
atp_mickeys_scale_factor; \
\
/* \
* Deduct the rounded mickeys from pending mickeys. \
* Note: we multiply by 2 to offset the previous \
* accumulation of instantaneous movement into \
* pending. \
*/ \
(P) -= ((I) << 1); \
\
/* truncate pending to 0 if it becomes positive. */ \
(P) = imin((P), 0); \
} \
}
UPDATE_INSTANTANEOUS_AND_PENDING(strokep->instantaneous_dx,
strokep->pending_dx);
UPDATE_INSTANTANEOUS_AND_PENDING(strokep->instantaneous_dy,
strokep->pending_dy);
}
/*
* Compute a smoothened value for the stroke's movement from
* instantaneous changes in the X and Y components.
*/
static boolean_t
atp_compute_stroke_movement(atp_stroke_t *strokep)
{
/*
* Short movements are added first to the 'pending' bucket,
* and then acted upon only when their aggregate exceeds a
* threshold. This has the effect of filtering away movement
* noise.
*/
if (atp_stroke_has_small_movement(strokep))
atp_update_pending_mickeys(strokep);
else { /* large movement */
/* clear away any pending mickeys if there are large movements*/
strokep->pending_dx = 0;
strokep->pending_dy = 0;
}
/* scale movement */
strokep->movement_dx = (strokep->instantaneous_dx) /
(int)atp_mickeys_scale_factor;
strokep->movement_dy = (strokep->instantaneous_dy) /
(int)atp_mickeys_scale_factor;
if ((abs(strokep->instantaneous_dx) >= ATP_FAST_MOVEMENT_TRESHOLD) ||
(abs(strokep->instantaneous_dy) >= ATP_FAST_MOVEMENT_TRESHOLD)) {
strokep->movement_dx <<= 1;
strokep->movement_dy <<= 1;
}
strokep->cum_movement_x += strokep->movement_dx;
strokep->cum_movement_y += strokep->movement_dy;
return ((strokep->movement_dx != 0) || (strokep->movement_dy != 0));
}
/*
* Terminate a stroke. Aside from immature strokes, a slide or touch is
* retained as a zombies so as to reap all their termination siblings
* together; this helps establish the number of fingers involved at the
* end of a multi-touch gesture.
*/
static void
atp_terminate_stroke(struct atp_softc *sc, atp_stroke_t *strokep)
{
if (strokep->flags & ATSF_ZOMBIE)
return;
/* Drop immature strokes rightaway. */
if (strokep->age <= atp_stroke_maturity_threshold) {
atp_free_stroke(sc, strokep);
return;
}
strokep->flags |= ATSF_ZOMBIE;
sc->sc_state |= ATP_ZOMBIES_EXIST;
callout_reset(&sc->sc_callout, ATP_ZOMBIE_STROKE_REAP_INTERVAL,
atp_reap_sibling_zombies, sc);
/*
* Reset the double-click-n-drag at the termination of any
* slide stroke.
*/
if (strokep->type == ATP_STROKE_SLIDE)
sc->sc_state &= ~ATP_DOUBLE_TAP_DRAG;
}
static boolean_t
atp_is_horizontal_scroll(const atp_stroke_t *strokep)
{
if (abs(strokep->cum_movement_x) < atp_slide_min_movement)
return (false);
if (strokep->cum_movement_y == 0)
return (true);
return (abs(strokep->cum_movement_x / strokep->cum_movement_y) >= 4);
}
static boolean_t
atp_is_vertical_scroll(const atp_stroke_t *strokep)
{
if (abs(strokep->cum_movement_y) < atp_slide_min_movement)
return (false);
if (strokep->cum_movement_x == 0)
return (true);
return (abs(strokep->cum_movement_y / strokep->cum_movement_x) >= 4);
}
static void
atp_reap_sibling_zombies(void *arg)
{
struct atp_softc *sc = (struct atp_softc *)arg;
u_int8_t n_touches_reaped = 0;
u_int8_t n_slides_reaped = 0;
u_int8_t n_horizontal_scrolls = 0;
u_int8_t n_vertical_scrolls = 0;
int horizontal_scroll = 0;
int vertical_scroll = 0;
atp_stroke_t *strokep;
atp_stroke_t *strokep_next;
DPRINTFN(ATP_LLEVEL_INFO, "\n");
TAILQ_FOREACH_SAFE(strokep, &sc->sc_stroke_used, entry, strokep_next) {
if ((strokep->flags & ATSF_ZOMBIE) == 0)
continue;
if (strokep->type == ATP_STROKE_TOUCH) {
n_touches_reaped++;
} else {
n_slides_reaped++;
if (atp_is_horizontal_scroll(strokep)) {
n_horizontal_scrolls++;
horizontal_scroll += strokep->cum_movement_x;
} else if (atp_is_vertical_scroll(strokep)) {
n_vertical_scrolls++;
vertical_scroll += strokep->cum_movement_y;
}
}
atp_free_stroke(sc, strokep);
}
DPRINTFN(ATP_LLEVEL_INFO, "reaped %u zombies\n",
n_touches_reaped + n_slides_reaped);
sc->sc_state &= ~ATP_ZOMBIES_EXIST;
/* No further processing necessary if physical button is depressed. */
if (sc->sc_ibtn != 0)
return;
if ((n_touches_reaped == 0) && (n_slides_reaped == 0))
return;
/* Add a pair of virtual button events (button-down and button-up) if
* the physical button isn't pressed. */
if (n_touches_reaped != 0) {
if (n_touches_reaped < atp_tap_minimum)
return;
switch (n_touches_reaped) {
case 1:
atp_add_to_queue(sc, 0, 0, 0, MOUSE_BUTTON1DOWN);
microtime(&sc->sc_touch_reap_time); /* remember this time */
break;
case 2:
atp_add_to_queue(sc, 0, 0, 0, MOUSE_BUTTON3DOWN);
break;
case 3:
atp_add_to_queue(sc, 0, 0, 0, MOUSE_BUTTON2DOWN);
break;
default:
/* we handle taps of only up to 3 fingers */
return;
}
atp_add_to_queue(sc, 0, 0, 0, 0); /* button release */
} else if ((n_slides_reaped == 2) && (n_horizontal_scrolls == 2)) {
if (horizontal_scroll < 0)
atp_add_to_queue(sc, 0, 0, 0, MOUSE_BUTTON4DOWN);
else
atp_add_to_queue(sc, 0, 0, 0, MOUSE_BUTTON5DOWN);
atp_add_to_queue(sc, 0, 0, 0, 0); /* button release */
}
}
/* Switch a given touch stroke to being a slide. */
static void
atp_convert_to_slide(struct atp_softc *sc, atp_stroke_t *strokep)
{
strokep->type = ATP_STROKE_SLIDE;
/* Are we at the beginning of a double-click-n-drag? */
if ((sc->sc_n_strokes == 1) &&
((sc->sc_state & ATP_ZOMBIES_EXIST) == 0) &&
timevalcmp(&strokep->ctime, &sc->sc_touch_reap_time, >)) {
struct timeval delta;
struct timeval window = {
atp_double_tap_threshold / 1000000,
atp_double_tap_threshold % 1000000
};
delta = strokep->ctime;
timevalsub(&delta, &sc->sc_touch_reap_time);
if (timevalcmp(&delta, &window, <=))
sc->sc_state |= ATP_DOUBLE_TAP_DRAG;
}
}
static void
atp_reset_buf(struct atp_softc *sc)
{
/* reset read queue */
usb_fifo_reset(sc->sc_fifo.fp[USB_FIFO_RX]);
}
static void
atp_add_to_queue(struct atp_softc *sc, int dx, int dy, int dz,
uint32_t buttons_in)
{
uint32_t buttons_out;
uint8_t buf[8];
dx = imin(dx, 254); dx = imax(dx, -256);
dy = imin(dy, 254); dy = imax(dy, -256);
dz = imin(dz, 126); dz = imax(dz, -128);
buttons_out = MOUSE_MSC_BUTTONS;
if (buttons_in & MOUSE_BUTTON1DOWN)
buttons_out &= ~MOUSE_MSC_BUTTON1UP;
else if (buttons_in & MOUSE_BUTTON2DOWN)
buttons_out &= ~MOUSE_MSC_BUTTON2UP;
else if (buttons_in & MOUSE_BUTTON3DOWN)
buttons_out &= ~MOUSE_MSC_BUTTON3UP;
DPRINTFN(ATP_LLEVEL_INFO, "dx=%d, dy=%d, buttons=%x\n",
dx, dy, buttons_out);
/* Encode the mouse data in standard format; refer to mouse(4) */
buf[0] = sc->sc_mode.syncmask[1];
buf[0] |= buttons_out;
buf[1] = dx >> 1;
buf[2] = dy >> 1;
buf[3] = dx - (dx >> 1);
buf[4] = dy - (dy >> 1);
/* Encode extra bytes for level 1 */
if (sc->sc_mode.level == 1) {
buf[5] = dz >> 1;
buf[6] = dz - (dz >> 1);
buf[7] = (((~buttons_in) >> 3) & MOUSE_SYS_EXTBUTTONS);
}
usb_fifo_put_data_linear(sc->sc_fifo.fp[USB_FIFO_RX], buf,
sc->sc_mode.packetsize, 1);
}
static int
atp_probe(device_t self)
{
struct usb_attach_arg *uaa = device_get_ivars(self);
if (uaa->usb_mode != USB_MODE_HOST)
return (ENXIO);
if (uaa->info.bInterfaceClass != UICLASS_HID)
return (ENXIO);
/*
* Note: for some reason, the check
* (uaa->info.bInterfaceProtocol == UIPROTO_MOUSE) doesn't hold true
* for wellspring trackpads, so we've removed it from the common path.
*/
if ((usbd_lookup_id_by_uaa(fg_devs, sizeof(fg_devs), uaa)) == 0)
return ((uaa->info.bInterfaceProtocol == UIPROTO_MOUSE) ?
0 : ENXIO);
if ((usbd_lookup_id_by_uaa(wsp_devs, sizeof(wsp_devs), uaa)) == 0)
if (uaa->info.bIfaceIndex == WELLSPRING_INTERFACE_INDEX)
return (0);
return (ENXIO);
}
static int
atp_attach(device_t dev)
{
struct atp_softc *sc = device_get_softc(dev);
struct usb_attach_arg *uaa = device_get_ivars(dev);
usb_error_t err;
void *descriptor_ptr = NULL;
uint16_t descriptor_len;
unsigned long di;
DPRINTFN(ATP_LLEVEL_INFO, "sc=%p\n", sc);
sc->sc_dev = dev;
sc->sc_usb_device = uaa->device;
/* Get HID descriptor */
if (usbd_req_get_hid_desc(uaa->device, NULL, &descriptor_ptr,
&descriptor_len, M_TEMP, uaa->info.bIfaceIndex) !=
USB_ERR_NORMAL_COMPLETION)
return (ENXIO);
/* Get HID report descriptor length */
sc->sc_expected_sensor_data_len = hid_report_size(descriptor_ptr,
descriptor_len, hid_input, NULL);
free(descriptor_ptr, M_TEMP);
if ((sc->sc_expected_sensor_data_len <= 0) ||
(sc->sc_expected_sensor_data_len > ATP_SENSOR_DATA_BUF_MAX)) {
DPRINTF("atp_attach: datalength invalid or too large: %d\n",
sc->sc_expected_sensor_data_len);
return (ENXIO);
}
/*
* By default the touchpad behaves like an HID device, sending
* packets with reportID = 2. Such reports contain only
* limited information--they encode movement deltas and button
* events,--but do not include data from the pressure
* sensors. The device input mode can be switched from HID
* reports to raw sensor data using vendor-specific USB
* control commands.
*/
if ((err = atp_set_device_mode(sc, RAW_SENSOR_MODE)) != 0) {
DPRINTF("failed to set mode to 'RAW_SENSOR' (%d)\n", err);
return (ENXIO);
}
mtx_init(&sc->sc_mutex, "atpmtx", NULL, MTX_DEF | MTX_RECURSE);
di = USB_GET_DRIVER_INFO(uaa);
sc->sc_family = DECODE_FAMILY_FROM_DRIVER_INFO(di);
switch(sc->sc_family) {
case TRACKPAD_FAMILY_FOUNTAIN_GEYSER:
sc->sc_params =
&fg_dev_params[DECODE_PRODUCT_FROM_DRIVER_INFO(di)];
sc->sensor_data_interpreter = fg_interpret_sensor_data;
break;
case TRACKPAD_FAMILY_WELLSPRING:
sc->sc_params =
&wsp_dev_params[DECODE_PRODUCT_FROM_DRIVER_INFO(di)];
sc->sensor_data_interpreter = wsp_interpret_sensor_data;
break;
default:
goto detach;
}
err = usbd_transfer_setup(uaa->device,
&uaa->info.bIfaceIndex, sc->sc_xfer, atp_xfer_config,
ATP_N_TRANSFER, sc, &sc->sc_mutex);
if (err) {
DPRINTF("error=%s\n", usbd_errstr(err));
goto detach;
}
if (usb_fifo_attach(sc->sc_usb_device, sc, &sc->sc_mutex,
&atp_fifo_methods, &sc->sc_fifo,
device_get_unit(dev), -1, uaa->info.bIfaceIndex,
UID_ROOT, GID_OPERATOR, 0644)) {
goto detach;
}
device_set_usb_desc(dev);
sc->sc_hw.buttons = 3;
sc->sc_hw.iftype = MOUSE_IF_USB;
sc->sc_hw.type = MOUSE_PAD;
sc->sc_hw.model = MOUSE_MODEL_GENERIC;
sc->sc_hw.hwid = 0;
sc->sc_mode.protocol = MOUSE_PROTO_MSC;
sc->sc_mode.rate = -1;
sc->sc_mode.resolution = MOUSE_RES_UNKNOWN;
sc->sc_mode.packetsize = MOUSE_MSC_PACKETSIZE;
sc->sc_mode.syncmask[0] = MOUSE_MSC_SYNCMASK;
sc->sc_mode.syncmask[1] = MOUSE_MSC_SYNC;
sc->sc_mode.accelfactor = 0;
sc->sc_mode.level = 0;
sc->sc_state = 0;
sc->sc_ibtn = 0;
callout_init_mtx(&sc->sc_callout, &sc->sc_mutex, 0);
return (0);
detach:
atp_detach(dev);
return (ENOMEM);
}
static int
atp_detach(device_t dev)
{
struct atp_softc *sc;
sc = device_get_softc(dev);
atp_set_device_mode(sc, HID_MODE);
mtx_lock(&sc->sc_mutex);
callout_drain(&sc->sc_callout);
if (sc->sc_state & ATP_ENABLED)
atp_disable(sc);
mtx_unlock(&sc->sc_mutex);
usb_fifo_detach(&sc->sc_fifo);
usbd_transfer_unsetup(sc->sc_xfer, ATP_N_TRANSFER);
mtx_destroy(&sc->sc_mutex);
return (0);
}
static void
atp_intr(struct usb_xfer *xfer, usb_error_t error)
{
struct atp_softc *sc = usbd_xfer_softc(xfer);
struct usb_page_cache *pc;
int len;
usbd_xfer_status(xfer, &len, NULL, NULL, NULL);
switch (USB_GET_STATE(xfer)) {
case USB_ST_TRANSFERRED:
pc = usbd_xfer_get_frame(xfer, 0);
usbd_copy_out(pc, 0, sc->sc_sensor_data, len);
if (len < sc->sc_expected_sensor_data_len) {
/* make sure we don't process old data */
memset(sc->sc_sensor_data + len, 0,
sc->sc_expected_sensor_data_len - len);
}
sc->sc_status.flags &= ~(MOUSE_STDBUTTONSCHANGED |
MOUSE_POSCHANGED);
sc->sc_status.obutton = sc->sc_status.button;
(sc->sensor_data_interpreter)(sc, len);
if (sc->sc_status.button != 0) {
/* Reset DOUBLE_TAP_N_DRAG if the button is pressed. */
sc->sc_state &= ~ATP_DOUBLE_TAP_DRAG;
} else if (sc->sc_state & ATP_DOUBLE_TAP_DRAG) {
/* Assume a button-press with DOUBLE_TAP_N_DRAG. */
sc->sc_status.button = MOUSE_BUTTON1DOWN;
}
sc->sc_status.flags |=
sc->sc_status.button ^ sc->sc_status.obutton;
if (sc->sc_status.flags & MOUSE_STDBUTTONSCHANGED) {
DPRINTFN(ATP_LLEVEL_INFO, "button %s\n",
((sc->sc_status.button & MOUSE_BUTTON1DOWN) ?
"pressed" : "released"));
}
if (sc->sc_status.flags & (MOUSE_POSCHANGED |
MOUSE_STDBUTTONSCHANGED)) {
atp_stroke_t *strokep;
u_int8_t n_movements = 0;
int dx = 0;
int dy = 0;
int dz = 0;
TAILQ_FOREACH(strokep, &sc->sc_stroke_used, entry) {
if (strokep->flags & ATSF_ZOMBIE)
continue;
dx += strokep->movement_dx;
dy += strokep->movement_dy;
if (strokep->movement_dx ||
strokep->movement_dy)
n_movements++;
}
/* average movement if multiple strokes record motion.*/
if (n_movements > 1) {
dx /= (int)n_movements;
dy /= (int)n_movements;
}
/* detect multi-finger vertical scrolls */
if (n_movements >= 2) {
boolean_t all_vertical_scrolls = true;
TAILQ_FOREACH(strokep, &sc->sc_stroke_used, entry) {
if (strokep->flags & ATSF_ZOMBIE)
continue;
if (!atp_is_vertical_scroll(strokep))
all_vertical_scrolls = false;
}
if (all_vertical_scrolls) {
dz = dy;
dy = dx = 0;
}
}
sc->sc_status.dx += dx;
sc->sc_status.dy += dy;
sc->sc_status.dz += dz;
atp_add_to_queue(sc, dx, -dy, -dz, sc->sc_status.button);
}
case USB_ST_SETUP:
tr_setup:
/* check if we can put more data into the FIFO */
if (usb_fifo_put_bytes_max(sc->sc_fifo.fp[USB_FIFO_RX]) != 0) {
usbd_xfer_set_frame_len(xfer, 0,
sc->sc_expected_sensor_data_len);
usbd_transfer_submit(xfer);
}
break;
default: /* Error */
if (error != USB_ERR_CANCELLED) {
/* try clear stall first */
usbd_xfer_set_stall(xfer);
goto tr_setup;
}
break;
}
}
static void
atp_start_read(struct usb_fifo *fifo)
{
struct atp_softc *sc = usb_fifo_softc(fifo);
int rate;
/* Check if we should override the default polling interval */
rate = sc->sc_pollrate;
/* Range check rate */
if (rate > 1000)
rate = 1000;
/* Check for set rate */
if ((rate > 0) && (sc->sc_xfer[ATP_INTR_DT] != NULL)) {
/* Stop current transfer, if any */
usbd_transfer_stop(sc->sc_xfer[ATP_INTR_DT]);
/* Set new interval */
usbd_xfer_set_interval(sc->sc_xfer[ATP_INTR_DT], 1000 / rate);
/* Only set pollrate once */
sc->sc_pollrate = 0;
}
usbd_transfer_start(sc->sc_xfer[ATP_INTR_DT]);
}
static void
atp_stop_read(struct usb_fifo *fifo)
{
struct atp_softc *sc = usb_fifo_softc(fifo);
usbd_transfer_stop(sc->sc_xfer[ATP_INTR_DT]);
}
static int
atp_open(struct usb_fifo *fifo, int fflags)
{
struct atp_softc *sc = usb_fifo_softc(fifo);
/* check for duplicate open, should not happen */
if (sc->sc_fflags & fflags)
return (EBUSY);
/* check for first open */
if (sc->sc_fflags == 0) {
int rc;
if ((rc = atp_enable(sc)) != 0)
return (rc);
}
if (fflags & FREAD) {
if (usb_fifo_alloc_buffer(fifo,
ATP_FIFO_BUF_SIZE, ATP_FIFO_QUEUE_MAXLEN)) {
return (ENOMEM);
}
}
sc->sc_fflags |= (fflags & (FREAD | FWRITE));
return (0);
}
static void
atp_close(struct usb_fifo *fifo, int fflags)
{
struct atp_softc *sc = usb_fifo_softc(fifo);
if (fflags & FREAD)
usb_fifo_free_buffer(fifo);
sc->sc_fflags &= ~(fflags & (FREAD | FWRITE));
if (sc->sc_fflags == 0) {
atp_disable(sc);
}
}
static int
atp_ioctl(struct usb_fifo *fifo, u_long cmd, void *addr, int fflags)
{
struct atp_softc *sc = usb_fifo_softc(fifo);
mousemode_t mode;
int error = 0;
mtx_lock(&sc->sc_mutex);
switch(cmd) {
case MOUSE_GETHWINFO:
*(mousehw_t *)addr = sc->sc_hw;
break;
case MOUSE_GETMODE:
*(mousemode_t *)addr = sc->sc_mode;
break;
case MOUSE_SETMODE:
mode = *(mousemode_t *)addr;
if (mode.level == -1)
/* Don't change the current setting */
;
else if ((mode.level < 0) || (mode.level > 1)) {
error = EINVAL;
break;
}
sc->sc_mode.level = mode.level;
sc->sc_pollrate = mode.rate;
sc->sc_hw.buttons = 3;
if (sc->sc_mode.level == 0) {
sc->sc_mode.protocol = MOUSE_PROTO_MSC;
sc->sc_mode.packetsize = MOUSE_MSC_PACKETSIZE;
sc->sc_mode.syncmask[0] = MOUSE_MSC_SYNCMASK;
sc->sc_mode.syncmask[1] = MOUSE_MSC_SYNC;
} else if (sc->sc_mode.level == 1) {
sc->sc_mode.protocol = MOUSE_PROTO_SYSMOUSE;
sc->sc_mode.packetsize = MOUSE_SYS_PACKETSIZE;
sc->sc_mode.syncmask[0] = MOUSE_SYS_SYNCMASK;
sc->sc_mode.syncmask[1] = MOUSE_SYS_SYNC;
}
atp_reset_buf(sc);
break;
case MOUSE_GETLEVEL:
*(int *)addr = sc->sc_mode.level;
break;
case MOUSE_SETLEVEL:
if ((*(int *)addr < 0) || (*(int *)addr > 1)) {
error = EINVAL;
break;
}
sc->sc_mode.level = *(int *)addr;
sc->sc_hw.buttons = 3;
if (sc->sc_mode.level == 0) {
sc->sc_mode.protocol = MOUSE_PROTO_MSC;
sc->sc_mode.packetsize = MOUSE_MSC_PACKETSIZE;
sc->sc_mode.syncmask[0] = MOUSE_MSC_SYNCMASK;
sc->sc_mode.syncmask[1] = MOUSE_MSC_SYNC;
} else if (sc->sc_mode.level == 1) {
sc->sc_mode.protocol = MOUSE_PROTO_SYSMOUSE;
sc->sc_mode.packetsize = MOUSE_SYS_PACKETSIZE;
sc->sc_mode.syncmask[0] = MOUSE_SYS_SYNCMASK;
sc->sc_mode.syncmask[1] = MOUSE_SYS_SYNC;
}
atp_reset_buf(sc);
break;
case MOUSE_GETSTATUS: {
mousestatus_t *status = (mousestatus_t *)addr;
*status = sc->sc_status;
sc->sc_status.obutton = sc->sc_status.button;
sc->sc_status.button = 0;
sc->sc_status.dx = 0;
sc->sc_status.dy = 0;
sc->sc_status.dz = 0;
if (status->dx || status->dy || status->dz)
status->flags |= MOUSE_POSCHANGED;
if (status->button != status->obutton)
status->flags |= MOUSE_BUTTONSCHANGED;
break;
}
default:
error = ENOTTY;
break;
}
mtx_unlock(&sc->sc_mutex);
return (error);
}
static int
atp_sysctl_scale_factor_handler(SYSCTL_HANDLER_ARGS)
{
int error;
u_int tmp;
tmp = atp_mickeys_scale_factor;
error = sysctl_handle_int(oidp, &tmp, 0, req);
if (error != 0 || req->newptr == NULL)
return (error);
if (tmp == atp_mickeys_scale_factor)
return (0); /* no change */
if ((tmp == 0) || (tmp > (10 * ATP_SCALE_FACTOR)))
return (EINVAL);
atp_mickeys_scale_factor = tmp;
DPRINTFN(ATP_LLEVEL_INFO, "%s: resetting mickeys_scale_factor to %u\n",
ATP_DRIVER_NAME, tmp);
return (0);
}
static devclass_t atp_devclass;
static device_method_t atp_methods[] = {
DEVMETHOD(device_probe, atp_probe),
DEVMETHOD(device_attach, atp_attach),
DEVMETHOD(device_detach, atp_detach),
DEVMETHOD_END
};
static driver_t atp_driver = {
.name = ATP_DRIVER_NAME,
.methods = atp_methods,
.size = sizeof(struct atp_softc)
};
DRIVER_MODULE(atp, uhub, atp_driver, atp_devclass, NULL, 0);
MODULE_DEPEND(atp, usb, 1, 1, 1);
MODULE_VERSION(atp, 1);
USB_PNP_HOST_INFO(fg_devs);
USB_PNP_HOST_INFO(wsp_devs);
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