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freebsd-dev/sys/dev/hid/bcm5974.c

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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2012 Huang Wen Hui
* Copyright (c) 2021 Vladimir Kondratyev <wulf@FreeBSD.org>
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/endian.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/sysctl.h>
#include <sys/systm.h>
#include <dev/evdev/input.h>
#include <dev/evdev/evdev.h>
#define HID_DEBUG_VAR bcm5974_debug
#include <dev/hid/hid.h>
#include <dev/hid/hidbus.h>
#include <dev/hid/hidquirk.h>
#include <dev/usb/usb.h>
#include <dev/usb/usbdi.h>
#include <dev/usb/usbhid.h>
#include <dev/usb/usb_ioctl.h>
#include "usbdevs.h"
#define BCM5974_BUFFER_MAX (248 * 4) /* 4 Type4 SPI frames */
#define BCM5974_TLC_PAGE HUP_GENERIC_DESKTOP
#define BCM5974_TLC_USAGE HUG_MOUSE
/* magic to switch device from HID (default) mode into raw */
/* Type1 & Type2 trackpads */
#define BCM5974_USB_IFACE_INDEX 0
#define BCM5974_USB_REPORT_LEN 8
#define BCM5974_USB_REPORT_ID 0
#define BCM5974_USB_MODE_RAW 0x01
#define BCM5974_USB_MODE_HID 0x08
/* Type4 trackpads */
#define BCM5974_HID_REPORT_LEN 2
#define BCM5974_HID_REPORT_ID 2
#define BCM5974_HID_MODE_RAW 0x01
#define BCM5974_HID_MODE_HID 0x00
/* Tunables */
static SYSCTL_NODE(_hw_hid, OID_AUTO, bcm5974, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
"HID wellspring touchpad");
#ifdef HID_DEBUG
enum wsp_log_level {
BCM5974_LLEVEL_DISABLED = 0,
BCM5974_LLEVEL_ERROR,
BCM5974_LLEVEL_DEBUG, /* for troubleshooting */
BCM5974_LLEVEL_INFO, /* for diagnostics */
};
/* the default is to only log errors */
static int bcm5974_debug = BCM5974_LLEVEL_ERROR;
SYSCTL_INT(_hw_hid_bcm5974, OID_AUTO, debug, CTLFLAG_RWTUN,
&bcm5974_debug, BCM5974_LLEVEL_ERROR, "BCM5974 debug level");
#endif /* HID_DEBUG */
/*
* 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)
*/
/* trackpad header types */
enum tp_type {
TYPE1, /* plain trackpad */
TYPE2, /* button integrated in trackpad */
TYPE3, /* additional header fields since June 2013 */
TYPE4, /* additional header field for pressure data */
TYPE_CNT
};
/* list of device capability bits */
#define HAS_INTEGRATED_BUTTON 1
struct tp_type_params {
uint8_t caps; /* device capability bitmask */
uint8_t button; /* offset to button data */
uint8_t offset; /* offset to trackpad finger data */
uint8_t delta; /* offset from header to finger struct */
} const static tp[TYPE_CNT] = {
[TYPE1] = {
.caps = 0,
.button = 0,
.offset = 13 * 2,
.delta = 0,
},
[TYPE2] = {
.caps = HAS_INTEGRATED_BUTTON,
.button = 15,
.offset = 15 * 2,
.delta = 0,
},
[TYPE3] = {
.caps = HAS_INTEGRATED_BUTTON,
.button = 23,
.offset = 19 * 2,
.delta = 0,
},
[TYPE4] = {
.caps = HAS_INTEGRATED_BUTTON,
.button = 31,
.offset = 23 * 2,
.delta = 2,
},
};
/* trackpad finger structure - little endian */
struct tp_finger {
uint16_t origin; /* zero when switching track finger */
uint16_t abs_x; /* absolute x coodinate */
uint16_t abs_y; /* absolute y coodinate */
uint16_t rel_x; /* relative x coodinate */
uint16_t rel_y; /* relative y coodinate */
uint16_t tool_major; /* tool area, major axis */
uint16_t tool_minor; /* tool area, minor axis */
uint16_t orientation; /* 16384 when point, else 15 bit angle */
uint16_t touch_major; /* touch area, major axis */
uint16_t touch_minor; /* touch area, minor axis */
uint16_t unused[2]; /* zeros */
uint16_t pressure; /* pressure on forcetouch touchpad */
uint16_t multi; /* one finger: varies, more fingers:
* constant */
} __packed;
#define BCM5974_LE2H(x) ((int32_t)(int16_t)le16toh(x))
/* trackpad finger data size, empirically at least ten fingers */
#define MAX_FINGERS MAX_MT_SLOTS
#define MAX_FINGER_ORIENTATION 16384
enum {
BCM5974_FLAG_WELLSPRING1,
BCM5974_FLAG_WELLSPRING2,
BCM5974_FLAG_WELLSPRING3,
BCM5974_FLAG_WELLSPRING4,
BCM5974_FLAG_WELLSPRING4A,
BCM5974_FLAG_WELLSPRING5,
BCM5974_FLAG_WELLSPRING6A,
BCM5974_FLAG_WELLSPRING6,
BCM5974_FLAG_WELLSPRING5A,
BCM5974_FLAG_WELLSPRING7,
BCM5974_FLAG_WELLSPRING7A,
BCM5974_FLAG_WELLSPRING8,
BCM5974_FLAG_WELLSPRING9,
BCM5974_FLAG_MAX,
};
/* device-specific parameters */
struct bcm5974_axis {
int snratio; /* signal-to-noise ratio */
int min; /* device minimum reading */
int max; /* device maximum reading */
int size; /* physical size, mm */
};
/* device-specific configuration */
struct bcm5974_dev_params {
const struct tp_type_params* tp;
struct bcm5974_axis p; /* finger pressure limits */
struct bcm5974_axis w; /* finger width limits */
struct bcm5974_axis x; /* horizontal limits */
struct bcm5974_axis y; /* vertical limits */
struct bcm5974_axis o; /* orientation limits */
};
/* logical signal quality */
#define SN_PRESSURE 45 /* pressure signal-to-noise ratio */
#define SN_WIDTH 25 /* width signal-to-noise ratio */
#define SN_COORD 250 /* coordinate signal-to-noise ratio */
#define SN_ORIENT 10 /* orientation signal-to-noise ratio */
static const struct bcm5974_dev_params bcm5974_dev_params[BCM5974_FLAG_MAX] = {
[BCM5974_FLAG_WELLSPRING1] = {
.tp = tp + TYPE1,
.p = { SN_PRESSURE, 0, 256, 0 },
.w = { SN_WIDTH, 0, 2048, 0 },
.x = { SN_COORD, -4824, 5342, 105 },
.y = { SN_COORD, -172, 5820, 75 },
.o = { SN_ORIENT,
-MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION, 0 },
},
[BCM5974_FLAG_WELLSPRING2] = {
.tp = tp + TYPE1,
.p = { SN_PRESSURE, 0, 256, 0 },
.w = { SN_WIDTH, 0, 2048, 0 },
.x = { SN_COORD, -4824, 4824, 105 },
.y = { SN_COORD, -172, 4290, 75 },
.o = { SN_ORIENT,
-MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION, 0 },
},
[BCM5974_FLAG_WELLSPRING3] = {
.tp = tp + TYPE2,
.p = { SN_PRESSURE, 0, 300, 0 },
.w = { SN_WIDTH, 0, 2048, 0 },
.x = { SN_COORD, -4460, 5166, 105 },
.y = { SN_COORD, -75, 6700, 75 },
.o = { SN_ORIENT,
-MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION, 0 },
},
[BCM5974_FLAG_WELLSPRING4] = {
.tp = tp + TYPE2,
.p = { SN_PRESSURE, 0, 300, 0 },
.w = { SN_WIDTH, 0, 2048, 0 },
.x = { SN_COORD, -4620, 5140, 105 },
.y = { SN_COORD, -150, 6600, 75 },
.o = { SN_ORIENT,
-MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION, 0 },
},
[BCM5974_FLAG_WELLSPRING4A] = {
.tp = tp + TYPE2,
.p = { SN_PRESSURE, 0, 300, 0 },
.w = { SN_WIDTH, 0, 2048, 0 },
.x = { SN_COORD, -4616, 5112, 105 },
.y = { SN_COORD, -142, 5234, 75 },
.o = { SN_ORIENT,
-MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION, 0 },
},
[BCM5974_FLAG_WELLSPRING5] = {
.tp = tp + TYPE2,
.p = { SN_PRESSURE, 0, 300, 0 },
.w = { SN_WIDTH, 0, 2048, 0 },
.x = { SN_COORD, -4415, 5050, 105 },
.y = { SN_COORD, -55, 6680, 75 },
.o = { SN_ORIENT,
-MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION, 0 },
},
[BCM5974_FLAG_WELLSPRING6] = {
.tp = tp + TYPE2,
.p = { SN_PRESSURE, 0, 300, 0 },
.w = { SN_WIDTH, 0, 2048, 0 },
.x = { SN_COORD, -4620, 5140, 105 },
.y = { SN_COORD, -150, 6600, 75 },
.o = { SN_ORIENT,
-MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION, 0 },
},
[BCM5974_FLAG_WELLSPRING5A] = {
.tp = tp + TYPE2,
.p = { SN_PRESSURE, 0, 300, 0 },
.w = { SN_WIDTH, 0, 2048, 0 },
.x = { SN_COORD, -4750, 5280, 105 },
.y = { SN_COORD, -150, 6730, 75 },
.o = { SN_ORIENT,
-MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION, 0 },
},
[BCM5974_FLAG_WELLSPRING6A] = {
.tp = tp + TYPE2,
.p = { SN_PRESSURE, 0, 300, 0 },
.w = { SN_WIDTH, 0, 2048, 0 },
.x = { SN_COORD, -4620, 5140, 105 },
.y = { SN_COORD, -150, 6600, 75 },
.o = { SN_ORIENT,
-MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION, 0 },
},
[BCM5974_FLAG_WELLSPRING7] = {
.tp = tp + TYPE2,
.p = { SN_PRESSURE, 0, 300, 0 },
.w = { SN_WIDTH, 0, 2048, 0 },
.x = { SN_COORD, -4750, 5280, 105 },
.y = { SN_COORD, -150, 6730, 75 },
.o = { SN_ORIENT,
-MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION, 0 },
},
[BCM5974_FLAG_WELLSPRING7A] = {
.tp = tp + TYPE2,
.p = { SN_PRESSURE, 0, 300, 0 },
.w = { SN_WIDTH, 0, 2048, 0 },
.x = { SN_COORD, -4750, 5280, 105 },
.y = { SN_COORD, -150, 6730, 75 },
.o = { SN_ORIENT,
-MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION, 0 },
},
[BCM5974_FLAG_WELLSPRING8] = {
.tp = tp + TYPE3,
.p = { SN_PRESSURE, 0, 300, 0 },
.w = { SN_WIDTH, 0, 2048, 0 },
.x = { SN_COORD, -4620, 5140, 105 },
.y = { SN_COORD, -150, 6600, 75 },
.o = { SN_ORIENT,
-MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION, 0 },
},
[BCM5974_FLAG_WELLSPRING9] = {
.tp = tp + TYPE4,
.p = { SN_PRESSURE, 0, 300, 0 },
.w = { SN_WIDTH, 0, 2048, 0 },
.x = { SN_COORD, -4828, 5345, 105 },
.y = { SN_COORD, -203, 6803, 75 },
.o = { SN_ORIENT,
-MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION, 0 },
},
};
#define BCM5974_DEV(v,p,i) { \
HID_BVPI(BUS_USB, USB_VENDOR_##v, USB_PRODUCT_##v##_##p, i), \
HID_TLC(BCM5974_TLC_PAGE, BCM5974_TLC_USAGE), \
}
static const struct hid_device_id bcm5974_devs[] = {
/* MacbookAir1.1 */
BCM5974_DEV(APPLE, WELLSPRING_ANSI, BCM5974_FLAG_WELLSPRING1),
BCM5974_DEV(APPLE, WELLSPRING_ISO, BCM5974_FLAG_WELLSPRING1),
BCM5974_DEV(APPLE, WELLSPRING_JIS, BCM5974_FLAG_WELLSPRING1),
/* MacbookProPenryn, aka wellspring2 */
BCM5974_DEV(APPLE, WELLSPRING2_ANSI, BCM5974_FLAG_WELLSPRING2),
BCM5974_DEV(APPLE, WELLSPRING2_ISO, BCM5974_FLAG_WELLSPRING2),
BCM5974_DEV(APPLE, WELLSPRING2_JIS, BCM5974_FLAG_WELLSPRING2),
/* Macbook5,1 (unibody), aka wellspring3 */
BCM5974_DEV(APPLE, WELLSPRING3_ANSI, BCM5974_FLAG_WELLSPRING3),
BCM5974_DEV(APPLE, WELLSPRING3_ISO, BCM5974_FLAG_WELLSPRING3),
BCM5974_DEV(APPLE, WELLSPRING3_JIS, BCM5974_FLAG_WELLSPRING3),
/* MacbookAir3,2 (unibody), aka wellspring4 */
BCM5974_DEV(APPLE, WELLSPRING4_ANSI, BCM5974_FLAG_WELLSPRING4),
BCM5974_DEV(APPLE, WELLSPRING4_ISO, BCM5974_FLAG_WELLSPRING4),
BCM5974_DEV(APPLE, WELLSPRING4_JIS, BCM5974_FLAG_WELLSPRING4),
/* MacbookAir3,1 (unibody), aka wellspring4 */
BCM5974_DEV(APPLE, WELLSPRING4A_ANSI, BCM5974_FLAG_WELLSPRING4A),
BCM5974_DEV(APPLE, WELLSPRING4A_ISO, BCM5974_FLAG_WELLSPRING4A),
BCM5974_DEV(APPLE, WELLSPRING4A_JIS, BCM5974_FLAG_WELLSPRING4A),
/* Macbook8 (unibody, March 2011) */
BCM5974_DEV(APPLE, WELLSPRING5_ANSI, BCM5974_FLAG_WELLSPRING5),
BCM5974_DEV(APPLE, WELLSPRING5_ISO, BCM5974_FLAG_WELLSPRING5),
BCM5974_DEV(APPLE, WELLSPRING5_JIS, BCM5974_FLAG_WELLSPRING5),
/* MacbookAir4,1 (unibody, July 2011) */
BCM5974_DEV(APPLE, WELLSPRING6A_ANSI, BCM5974_FLAG_WELLSPRING6A),
BCM5974_DEV(APPLE, WELLSPRING6A_ISO, BCM5974_FLAG_WELLSPRING6A),
BCM5974_DEV(APPLE, WELLSPRING6A_JIS, BCM5974_FLAG_WELLSPRING6A),
/* MacbookAir4,2 (unibody, July 2011) */
BCM5974_DEV(APPLE, WELLSPRING6_ANSI, BCM5974_FLAG_WELLSPRING6),
BCM5974_DEV(APPLE, WELLSPRING6_ISO, BCM5974_FLAG_WELLSPRING6),
BCM5974_DEV(APPLE, WELLSPRING6_JIS, BCM5974_FLAG_WELLSPRING6),
/* Macbook8,2 (unibody) */
BCM5974_DEV(APPLE, WELLSPRING5A_ANSI, BCM5974_FLAG_WELLSPRING5A),
BCM5974_DEV(APPLE, WELLSPRING5A_ISO, BCM5974_FLAG_WELLSPRING5A),
BCM5974_DEV(APPLE, WELLSPRING5A_JIS, BCM5974_FLAG_WELLSPRING5A),
/* MacbookPro10,1 (unibody, June 2012) */
/* MacbookPro11,1-3 (unibody, June 2013) */
BCM5974_DEV(APPLE, WELLSPRING7_ANSI, BCM5974_FLAG_WELLSPRING7),
BCM5974_DEV(APPLE, WELLSPRING7_ISO, BCM5974_FLAG_WELLSPRING7),
BCM5974_DEV(APPLE, WELLSPRING7_JIS, BCM5974_FLAG_WELLSPRING7),
/* MacbookPro10,2 (unibody, October 2012) */
BCM5974_DEV(APPLE, WELLSPRING7A_ANSI, BCM5974_FLAG_WELLSPRING7A),
BCM5974_DEV(APPLE, WELLSPRING7A_ISO, BCM5974_FLAG_WELLSPRING7A),
BCM5974_DEV(APPLE, WELLSPRING7A_JIS, BCM5974_FLAG_WELLSPRING7A),
/* MacbookAir6,2 (unibody, June 2013) */
BCM5974_DEV(APPLE, WELLSPRING8_ANSI, BCM5974_FLAG_WELLSPRING8),
BCM5974_DEV(APPLE, WELLSPRING8_ISO, BCM5974_FLAG_WELLSPRING8),
BCM5974_DEV(APPLE, WELLSPRING8_JIS, BCM5974_FLAG_WELLSPRING8),
/* MacbookPro12,1 MacbookPro11,4 */
BCM5974_DEV(APPLE, WELLSPRING9_ANSI, BCM5974_FLAG_WELLSPRING9),
BCM5974_DEV(APPLE, WELLSPRING9_ISO, BCM5974_FLAG_WELLSPRING9),
BCM5974_DEV(APPLE, WELLSPRING9_JIS, BCM5974_FLAG_WELLSPRING9),
};
struct bcm5974_softc {
device_t sc_dev;
struct evdev_dev *sc_evdev;
/* device configuration */
const struct bcm5974_dev_params *sc_params;
bool sc_saved_mode;
};
static const uint8_t bcm5974_rdesc[] = {
0x05, BCM5974_TLC_PAGE, /* Usage Page (BCM5974_TLC_PAGE) */
0x09, BCM5974_TLC_USAGE,/* Usage (BCM5974_TLC_USAGE) */
0xA1, 0x01, /* Collection (Application) */
0x06, 0x00, 0xFF, /* Usage Page (Vendor Defined 0xFF00) */
0x09, 0x01, /* Usage (0x01) */
0x15, 0x00, /* Logical Minimum (0) */
0x26, 0xFF, 0x00, /* Logical Maximum (255) */
0x75, 0x08, /* Report Size (8) */
0x96, /* Report Count (BCM5974_BUFFER_MAX) */
BCM5974_BUFFER_MAX & 0xFF,
BCM5974_BUFFER_MAX >> 8 & 0xFF,
0x81, 0x02, /* Input (Data,Var,Abs) */
0xC0, /* End Collection */
};
/*
* function prototypes
*/
static evdev_open_t bcm5974_ev_open;
static evdev_close_t bcm5974_ev_close;
static const struct evdev_methods bcm5974_evdev_methods = {
.ev_open = &bcm5974_ev_open,
.ev_close = &bcm5974_ev_close,
};
static hid_intr_t bcm5974_intr;
/* Device methods. */
static device_identify_t bcm5974_identify;
static device_probe_t bcm5974_probe;
static device_attach_t bcm5974_attach;
static device_detach_t bcm5974_detach;
/*
* Type1 and Type2 touchpads use keyboard USB interface to switch from HID to
* RAW mode. Although it is possible to extend hkbd driver to support such a
* mode change requests, it's not wanted due to cross device tree dependencies.
* So, find lowest common denominator (struct usb_device of grandparent usbhid
* driver) of touchpad and keyboard drivers and issue direct USB requests.
*/
static int
bcm5974_set_device_mode_usb(struct bcm5974_softc *sc, bool on)
{
uint8_t mode_bytes[BCM5974_USB_REPORT_LEN];
struct usb_ctl_request ucr;
int err;
ucr.ucr_request.bmRequestType = UT_READ_CLASS_INTERFACE;
ucr.ucr_request.bRequest = UR_GET_REPORT;
USETW2(ucr.ucr_request.wValue,
UHID_FEATURE_REPORT, BCM5974_USB_REPORT_ID);
ucr.ucr_request.wIndex[0] = BCM5974_USB_IFACE_INDEX;
ucr.ucr_request.wIndex[1] = 0;
USETW(ucr.ucr_request.wLength, BCM5974_USB_REPORT_LEN);
ucr.ucr_data = mode_bytes;
err = hid_ioctl(sc->sc_dev, USB_REQUEST, (uintptr_t)&ucr);
if (err != 0) {
DPRINTF("Failed to read device mode (%d)\n", err);
return (EIO);
}
#if 0
/*
* 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);
#endif
mode_bytes[0] = on ? BCM5974_USB_MODE_RAW : BCM5974_USB_MODE_HID;
ucr.ucr_request.bmRequestType = UT_WRITE_CLASS_INTERFACE;
ucr.ucr_request.bRequest = UR_SET_REPORT;
err = hid_ioctl(sc->sc_dev, USB_REQUEST, (uintptr_t)&ucr);
if (err != 0) {
DPRINTF("Failed to write device mode (%d)\n", err);
return (EIO);
}
return (0);
}
static int
bcm5974_set_device_mode_hid(struct bcm5974_softc *sc, bool on)
{
uint8_t mode_bytes[BCM5974_HID_REPORT_LEN] = {
BCM5974_HID_REPORT_ID,
on ? BCM5974_HID_MODE_RAW : BCM5974_HID_MODE_HID,
};
#if 0
int err;
err = hid_get_report(sc->sc_dev, mode_bytes, BCM5974_HID_REPORT_LEN,
NULL, HID_FEATURE_REPORT, BCM5974_HID_REPORT_ID);
if (err != 0) {
DPRINTF("Failed to read device mode (%d)\n", err);
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);
mode_bytes[1] = on ? BCM5974_HID_MODE_RAW : BCM5974_HID_MODE_HID;
#endif
return (hid_set_report(sc->sc_dev, mode_bytes, BCM5974_HID_REPORT_LEN,
HID_FEATURE_REPORT, BCM5974_HID_REPORT_ID));
}
static int
bcm5974_set_device_mode(struct bcm5974_softc *sc, bool on)
{
int err = 0;
switch (sc->sc_params->tp - tp) {
case TYPE1:
case TYPE2:
err = bcm5974_set_device_mode_usb(sc, on);
break;
case TYPE3: /* Type 3 does not require a mode switch */
break;
case TYPE4:
err = bcm5974_set_device_mode_hid(sc, on);
break;
default:
KASSERT(0 == 1, ("Unknown trackpad type"));
}
if (!err)
sc->sc_saved_mode = on;
return (err);
}
static void
bcm5974_identify(driver_t *driver, device_t parent)
{
void *d_ptr;
hid_size_t d_len;
/*
* The bcm5974 touchpad has no stable RAW mode TLC in its report
* descriptor. So replace existing HID mode mouse TLC with dummy one
* to set proper transport layer buffer sizes, make driver probe
* simpler and prevent unwanted hms driver attachment.
*/
if (HIDBUS_LOOKUP_ID(parent, bcm5974_devs) != NULL &&
hid_get_report_descr(parent, &d_ptr, &d_len) == 0 &&
hid_is_mouse(d_ptr, d_len))
hid_set_report_descr(parent, bcm5974_rdesc,
sizeof(bcm5974_rdesc));
}
static int
bcm5974_probe(device_t dev)
{
int err;
err = HIDBUS_LOOKUP_DRIVER_INFO(dev, bcm5974_devs);
if (err != 0)
return (err);
hidbus_set_desc(dev, "Touchpad");
return (BUS_PROBE_DEFAULT);
}
static int
bcm5974_attach(device_t dev)
{
struct bcm5974_softc *sc = device_get_softc(dev);
const struct hid_device_info *hw = hid_get_device_info(dev);
int err;
DPRINTFN(BCM5974_LLEVEL_INFO, "sc=%p\n", sc);
sc->sc_dev = dev;
/* get device specific configuration */
sc->sc_params = bcm5974_dev_params + hidbus_get_driver_info(dev);
sc->sc_evdev = evdev_alloc();
evdev_set_name(sc->sc_evdev, device_get_desc(dev));
evdev_set_phys(sc->sc_evdev, device_get_nameunit(dev));
evdev_set_id(sc->sc_evdev, hw->idBus, hw->idVendor, hw->idProduct,
hw->idVersion);
evdev_set_serial(sc->sc_evdev, hw->serial);
evdev_set_methods(sc->sc_evdev, sc, &bcm5974_evdev_methods);
evdev_support_prop(sc->sc_evdev, INPUT_PROP_POINTER);
evdev_support_event(sc->sc_evdev, EV_SYN);
evdev_support_event(sc->sc_evdev, EV_ABS);
evdev_support_event(sc->sc_evdev, EV_KEY);
evdev_set_flag(sc->sc_evdev, EVDEV_FLAG_EXT_EPOCH); /* hidbus child */
#define BCM5974_ABS(evdev, code, param) \
evdev_support_abs((evdev), (code), (param).min, (param).max, \
((param).max - (param).min) / (param).snratio, 0, \
(param).size != 0 ? ((param).max - (param).min) / (param).size : 0);
/* finger position */
BCM5974_ABS(sc->sc_evdev, ABS_MT_POSITION_X, sc->sc_params->x);
BCM5974_ABS(sc->sc_evdev, ABS_MT_POSITION_Y, sc->sc_params->y);
/* finger pressure */
BCM5974_ABS(sc->sc_evdev, ABS_MT_PRESSURE, sc->sc_params->p);
/* finger touch area */
BCM5974_ABS(sc->sc_evdev, ABS_MT_TOUCH_MAJOR, sc->sc_params->w);
BCM5974_ABS(sc->sc_evdev, ABS_MT_TOUCH_MINOR, sc->sc_params->w);
/* finger approach area */
BCM5974_ABS(sc->sc_evdev, ABS_MT_WIDTH_MAJOR, sc->sc_params->w);
BCM5974_ABS(sc->sc_evdev, ABS_MT_WIDTH_MINOR, sc->sc_params->w);
/* finger orientation */
BCM5974_ABS(sc->sc_evdev, ABS_MT_ORIENTATION, sc->sc_params->o);
/* button properties */
evdev_support_key(sc->sc_evdev, BTN_LEFT);
if ((sc->sc_params->tp->caps & HAS_INTEGRATED_BUTTON) != 0)
evdev_support_prop(sc->sc_evdev, INPUT_PROP_BUTTONPAD);
/* Enable automatic touch assignment for type B MT protocol */
evdev_support_abs(sc->sc_evdev, ABS_MT_SLOT,
0, MAX_FINGERS - 1, 0, 0, 0);
evdev_support_abs(sc->sc_evdev, ABS_MT_TRACKING_ID,
-1, MAX_FINGERS - 1, 0, 0, 0);
evdev_set_flag(sc->sc_evdev, EVDEV_FLAG_MT_TRACK);
evdev_set_flag(sc->sc_evdev, EVDEV_FLAG_MT_AUTOREL);
/* Synaptics compatibility events */
evdev_set_flag(sc->sc_evdev, EVDEV_FLAG_MT_STCOMPAT);
err = evdev_register(sc->sc_evdev);
if (err)
goto detach;
hidbus_set_intr(dev, bcm5974_intr, sc);
return (0);
detach:
bcm5974_detach(dev);
return (ENOMEM);
}
static int
bcm5974_detach(device_t dev)
{
struct bcm5974_softc *sc = device_get_softc(dev);
evdev_free(sc->sc_evdev);
return (0);
}
static int
bcm5974_resume(device_t dev)
{
struct bcm5974_softc *sc = device_get_softc(dev);
bcm5974_set_device_mode(sc, sc->sc_saved_mode);
return (0);
}
static void
bcm5974_intr(void *context, void *data, hid_size_t len)
{
struct bcm5974_softc *sc = context;
const struct bcm5974_dev_params *params = sc->sc_params;
union evdev_mt_slot slot_data;
struct tp_finger *f;
int ntouch; /* the finger number in touch */
int ibt; /* button status */
int i;
int slot;
uint8_t fsize = sizeof(struct tp_finger) + params->tp->delta;
if ((len < params->tp->offset + fsize) ||
((len - params->tp->offset) % fsize) != 0) {
DPRINTFN(BCM5974_LLEVEL_INFO, "Invalid length: %d, %x, %x\n",
len, sc->tp_data[0], sc->tp_data[1]);
return;
}
ibt = ((uint8_t *)data)[params->tp->button];
ntouch = (len - params->tp->offset) / fsize;
for (i = 0, slot = 0; i != ntouch; i++) {
f = (struct tp_finger *)(((uint8_t *)data) +
params->tp->offset + params->tp->delta + i * fsize);
DPRINTFN(BCM5974_LLEVEL_INFO,
"[%d]ibt=%d, taps=%d, o=%4d, ax=%5d, ay=%5d, "
"rx=%5d, ry=%5d, tlmaj=%4d, tlmin=%4d, ot=%4x, "
"tchmaj=%4d, tchmin=%4d, pressure=%4d, m=%4x\n",
i, ibt, ntouch, BCM5974_LE2H(f->origin),
BCM5974_LE2H(f->abs_x), BCM5974_LE2H(f->abs_y),
BCM5974_LE2H(f->rel_x), BCM5974_LE2H(f->rel_y),
BCM5974_LE2H(f->tool_major), BCM5974_LE2H(f->tool_minor),
BCM5974_LE2H(f->orientation), BCM5974_LE2H(f->touch_major),
BCM5974_LE2H(f->touch_minor), BCM5974_LE2H(f->pressure),
BCM5974_LE2H(f->multi));
if (BCM5974_LE2H(f->touch_major) == 0)
continue;
slot_data = (union evdev_mt_slot) {
.id = slot,
.x = BCM5974_LE2H(f->abs_x),
.y = params->y.min + params->y.max -
BCM5974_LE2H(f->abs_y),
.p = BCM5974_LE2H(f->pressure),
.maj = BCM5974_LE2H(f->touch_major) << 1,
.min = BCM5974_LE2H(f->touch_minor) << 1,
.w_maj = BCM5974_LE2H(f->tool_major) << 1,
.w_min = BCM5974_LE2H(f->tool_minor) << 1,
.ori = params->o.max - BCM5974_LE2H(f->orientation),
};
evdev_mt_push_slot(sc->sc_evdev, slot, &slot_data);
slot++;
}
evdev_push_key(sc->sc_evdev, BTN_LEFT, ibt);
evdev_sync(sc->sc_evdev);
}
static int
bcm5974_ev_open(struct evdev_dev *evdev)
{
struct bcm5974_softc *sc = evdev_get_softc(evdev);
int err;
/*
* By default the touchpad behaves like a HID device, sending
* packets with reportID = 8. 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:
*/
err = bcm5974_set_device_mode(sc, true);
if (err != 0) {
DPRINTF("failed to set mode to RAW MODE (%d)\n", err);
return (err);
}
return (hidbus_intr_start(sc->sc_dev));
}
static int
bcm5974_ev_close(struct evdev_dev *evdev)
{
struct bcm5974_softc *sc = evdev_get_softc(evdev);
int err;
err = hidbus_intr_stop(sc->sc_dev);
if (err != 0)
return (err);
/*
* During re-enumeration of the device we need to force the
* device back into HID mode before switching it to RAW
* mode. Else the device does not work like expected.
*/
err = bcm5974_set_device_mode(sc, false);
if (err != 0)
DPRINTF("Failed to set mode to HID MODE (%d)\n", err);
return (err);
}
static device_method_t bcm5974_methods[] = {
/* Device interface */
DEVMETHOD(device_identify, bcm5974_identify),
DEVMETHOD(device_probe, bcm5974_probe),
DEVMETHOD(device_attach, bcm5974_attach),
DEVMETHOD(device_detach, bcm5974_detach),
DEVMETHOD(device_resume, bcm5974_resume),
DEVMETHOD_END
};
static driver_t bcm5974_driver = {
.name = "bcm5974",
.methods = bcm5974_methods,
.size = sizeof(struct bcm5974_softc)
};
DRIVER_MODULE(bcm5974, hidbus, bcm5974_driver, NULL, NULL);
MODULE_DEPEND(bcm5974, hidbus, 1, 1, 1);
MODULE_DEPEND(bcm5974, hid, 1, 1, 1);
MODULE_DEPEND(bcm5974, evdev, 1, 1, 1);
MODULE_VERSION(bcm5974, 1);
HID_PNP_INFO(bcm5974_devs);
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