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hid: Import hconf(4) - digitizer configuration top-level collection support.

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Reviewed by:	hselasky (as part of D27990)
This commit is contained in:
Vladimir Kondratyev 2020-10-11 00:45:17 +03:00
parent 01f2e864f7
commit 10fbbdfbbd
7 changed files with 476 additions and 0 deletions
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1
share/man/man4/Makefile
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@ -179,6 +179,7 @@ MAN= aac.4 \
gpioths.4 \
gre.4 \
h_ertt.4 \
hconf.4 \
hidbus.4 \
hidquirk.4 \
hifn.4 \

90
share/man/man4/hconf.4 Normal file
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@ -0,0 +1,90 @@
.\" Copyright (c) 2020 Vladimir Kondratyev <wulf@FreeBSD.org>
.\"
.\" 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.
.\"
.\" $FreeBSD$
.\"
.Dd September 14, 2020
.Dt HCONF 4
.Os
.Sh NAME
.Nm hconf
.Nd MS Windows Precision Touchpad configuration driver
.Sh SYNOPSIS
To compile this driver into the kernel,
place the following lines in your
kernel configuration file:
.Bd -ragged -offset indent
.Cd "device hconf"
.Cd "device hid"
.Cd "device hidbus"
.Ed
.Pp
Alternatively, to load the driver as a
module at boot time, place the following line in
.Xr loader.conf 5 :
.Bd -literal -offset indent
hconf_load="YES"
.Ed
.Sh DESCRIPTION
The
.Nm
driver provides support for generic MS Windows Precision Touchpad
configuration collection.
It enables the host to configure two different aspects of the device.
One allows the host to select input mode, and the other allows the host to be
selective in what is reported.
.Sh SYSCTL VARIABLES
Next parameters are available as
.Xr sysctl 8
variables.
Debug parameter is available as
.Xr loader 8
tunable as well.
.Bl -tag -width indent
.It Va dev.hmt.*.input_mode
HID device input mode: 0 = mouse, 3 = touchpad.
.It Va dev.hmt.*.surface_switch
Enable / disable switch for surface: 1 = on, 0 = off.
.It Va dev.hmt.*.buttons_switch
Enable / disable switch for buttons: 1 = on, 0 = off.
.It Va hw.hid.hconf.debug
Debug output level, where 0 is debugging disabled and larger values increase
debug message verbosity.
Default is 0.
.El
.Sh SEE ALSO
.Xr hms 4 ,
.Xr hmt 4
.Sh HISTORY
The
.Nm
driver first appeared in
.Fx 13.0.
.Sh AUTHORS
.An -nosplit
The
.Nm
driver was written by
.An Vladimir Kondratyev Aq Mt wulf@FreeBSD.org .
Switch parameter support was added by
.An Andriy Gapon Aq Mt avg@FreeBSD.org .

1
sys/conf/files
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@ -1815,6 +1815,7 @@ dev/gpio/gpio_if.m optional gpio
dev/gpio/gpiobus_if.m optional gpio
dev/gpio/gpiopps.c optional gpiopps fdt
dev/gpio/ofw_gpiobus.c optional fdt gpio
dev/hid/hconf.c optional hconf
dev/hid/hid.c optional hid
dev/hid/hid_if.m optional hid
dev/hid/hidbus.c optional hidbus

331
sys/dev/hid/hconf.c Normal file
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@ -0,0 +1,331 @@
/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2019 Vladimir Kondratyev <wulf@FreeBSD.org>
*
* 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("$FreeBSD$");
/*
* Digitizer configuration top-level collection support.
* https://docs.microsoft.com/en-us/windows-hardware/design/component-guidelines/windows-precision-touchpad-required-hid-top-level-collections
*/
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/sysctl.h>
#include <sys/systm.h>
#include <sys/sx.h>
#define HID_DEBUG_VAR hconf_debug
#include <dev/hid/hid.h>
#include <dev/hid/hidbus.h>
#include <dev/hid/hconf.h>
#ifdef HID_DEBUG
static int hconf_debug = 0;
static SYSCTL_NODE(_hw_hid, OID_AUTO, hconf, CTLFLAG_RW, 0,
"Digitizer configuration top-level collection");
SYSCTL_INT(_hw_hid_hconf, OID_AUTO, debug, CTLFLAG_RWTUN,
&hconf_debug, 1, "Debug level");
#endif
enum feature_control_type {
INPUT_MODE = 0,
SURFACE_SWITCH,
BUTTONS_SWITCH,
CONTROLS_COUNT
};
struct feature_control_descr {
const char *name;
const char *descr;
uint16_t usage;
} feature_control_descrs[] = {
[INPUT_MODE] = {
.name = "input_mode",
.descr = "HID device input mode: 0 = mouse, 3 = touchpad",
.usage = HUD_INPUT_MODE
},
[SURFACE_SWITCH] = {
.name = "surface_switch",
.descr = "Enable / disable switch for surface: 1 = on, 0 = off",
.usage = HUD_SURFACE_SWITCH
},
[BUTTONS_SWITCH] = {
.name = "buttons_switch",
.descr = "Enable / disable switch for buttons: 1 = on, 0 = off",
.usage = HUD_BUTTONS_SWITCH
},
};
struct feature_control {
u_int val;
struct hid_location loc;
hid_size_t rlen;
uint8_t rid;
};
struct hconf_softc {
device_t dev;
struct sx lock;
struct feature_control feature_controls[CONTROLS_COUNT];
};
static device_probe_t hconf_probe;
static device_attach_t hconf_attach;
static device_detach_t hconf_detach;
static device_resume_t hconf_resume;
static devclass_t hconf_devclass;
static device_method_t hconf_methods[] = {
DEVMETHOD(device_probe, hconf_probe),
DEVMETHOD(device_attach, hconf_attach),
DEVMETHOD(device_detach, hconf_detach),
DEVMETHOD(device_resume, hconf_resume),
DEVMETHOD_END
};
static driver_t hconf_driver = {
.name = "hconf",
.methods = hconf_methods,
.size = sizeof(struct hconf_softc),
};
static const struct hid_device_id hconf_devs[] = {
{ HID_TLC(HUP_DIGITIZERS, HUD_CONFIG) },
};
static int
hconf_set_feature_control(struct hconf_softc *sc, int ctrl_id, u_int val)
{
struct feature_control *fc;
uint8_t *fbuf;
int error;
int i;
KASSERT(ctrl_id >= 0 && ctrl_id < CONTROLS_COUNT,
("impossible ctrl id %d", ctrl_id));
fc = &sc->feature_controls[ctrl_id];
if (fc->rlen <= 1)
return (ENXIO);
fbuf = malloc(fc->rlen, M_TEMP, M_WAITOK | M_ZERO);
sx_xlock(&sc->lock);
/* Reports are not strictly required to be readable */
error = hid_get_report(sc->dev, fbuf, fc->rlen, NULL,
HID_FEATURE_REPORT, fc->rid);
/*
* If the report is write-only, then we have to check for other controls
* that may share the same report and set their bits as well.
*/
if (error != 0) {
bzero(fbuf + 1, fc->rlen - 1);
for (i = 0; i < nitems(sc->feature_controls); i++) {
struct feature_control *ofc = &sc->feature_controls[i];
/* Skip unrelated report IDs. */
if (ofc->rid != fc->rid)
continue;
/* Skip self. */
if (ofc == fc)
continue;
KASSERT(fc->rlen == ofc->rlen,
("different lengths for report %d: %d vs %d\n",
fc->rid, fc->rlen, ofc->rlen));
hid_put_udata(fbuf + 1, ofc->rlen - 1, &ofc->loc,
ofc->val);
}
}
fbuf[0] = fc->rid;
hid_put_udata(fbuf + 1, fc->rlen - 1, &fc->loc, val);
error = hid_set_report(sc->dev, fbuf, fc->rlen,
HID_FEATURE_REPORT, fc->rid);
if (error == 0)
fc->val = val;
sx_unlock(&sc->lock);
free(fbuf, M_TEMP);
return (error);
}
static int
hconf_feature_control_handler(SYSCTL_HANDLER_ARGS)
{
struct feature_control *fc;
struct hconf_softc *sc = arg1;
int ctrl_id = arg2;
u_int value;
int error;
if (ctrl_id < 0 || ctrl_id >= CONTROLS_COUNT)
return (ENXIO);
fc = &sc->feature_controls[ctrl_id];
value = fc->val;
error = sysctl_handle_int(oidp, &value, 0, req);
if (error != 0 || req->newptr == NULL)
return (error);
error = hconf_set_feature_control(sc, ctrl_id, value);
if (error != 0) {
DPRINTF("Failed to set %s: %d\n",
feature_control_descrs[ctrl_id].name, error);
}
return (0);
}
static int
hconf_parse_feature(struct feature_control *fc, uint8_t tlc_index,
uint16_t usage, void *d_ptr, hid_size_t d_len)
{
uint32_t flags;
if (!hidbus_locate(d_ptr, d_len, HID_USAGE2(HUP_DIGITIZERS, usage),
hid_feature, tlc_index, 0, &fc->loc, &flags, &fc->rid, NULL))
return (ENOENT);
if ((flags & (HIO_VARIABLE | HIO_RELATIVE)) != HIO_VARIABLE)
return (EINVAL);
fc->rlen = hid_report_size(d_ptr, d_len, hid_feature, fc->rid);
return (0);
}
static int
hconf_probe(device_t dev)
{
int error;
error = HIDBUS_LOOKUP_DRIVER_INFO(dev, hconf_devs);
if (error != 0)
return (error);
hidbus_set_desc(dev, "Configuration");
return (BUS_PROBE_DEFAULT);
}
static int
hconf_attach(device_t dev)
{
struct hconf_softc *sc = device_get_softc(dev);
struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(dev);
struct sysctl_oid *tree = device_get_sysctl_tree(dev);
void *d_ptr;
hid_size_t d_len;
uint8_t tlc_index;
int error;
int i;
error = hid_get_report_descr(dev, &d_ptr, &d_len);
if (error) {
device_printf(dev, "could not retrieve report descriptor from "
"device: %d\n", error);
return (ENXIO);
}
sc->dev = dev;
sx_init(&sc->lock, device_get_nameunit(dev));
tlc_index = hidbus_get_index(dev);
for (i = 0; i < nitems(sc->feature_controls); i++) {
(void)hconf_parse_feature(&sc->feature_controls[i], tlc_index,
feature_control_descrs[i].usage, d_ptr, d_len);
if (sc->feature_controls[i].rlen > 1) {
SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
feature_control_descrs[i].name,
CTLTYPE_UINT | CTLFLAG_RW,
sc, i, hconf_feature_control_handler, "I",
feature_control_descrs[i].descr);
}
}
/* Fully enable (at least, try to). */
(void)hconf_set_feature_control(sc, SURFACE_SWITCH, 1);
(void)hconf_set_feature_control(sc, BUTTONS_SWITCH, 1);
return (0);
}
static int
hconf_detach(device_t dev)
{
struct hconf_softc *sc = device_get_softc(dev);
sx_destroy(&sc->lock);
return (0);
}
static int
hconf_resume(device_t dev)
{
struct hconf_softc *sc = device_get_softc(dev);
int error;
int i;
for (i = 0; i < nitems(sc->feature_controls); i++) {
if (sc->feature_controls[i].rlen < 2)
continue;
error = hconf_set_feature_control(sc, i,
sc->feature_controls[i].val);
if (error != 0) {
DPRINTF("Failed to restore %s: %d\n",
feature_control_descrs[i].name, error);
}
}
return (0);
}
int
hconf_set_input_mode(device_t dev, enum hconf_input_mode mode)
{
struct hconf_softc *sc = device_get_softc(dev);
return (hconf_set_feature_control(sc, INPUT_MODE, mode));
}
DRIVER_MODULE(hconf, hidbus, hconf_driver, hconf_devclass, NULL, 0);
MODULE_DEPEND(hconf, hidbus, 1, 1, 1);
MODULE_DEPEND(hconf, hid, 1, 1, 1);
MODULE_VERSION(hconf, 1);
HID_PNP_INFO(hconf_devs);

41
sys/dev/hid/hconf.h Normal file
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@ -0,0 +1,41 @@
/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2019 Vladimir Kondratyev <wulf@FreeBSD.org>
*
* 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.
*
* $FreeBSD$
*/
#ifndef _HCONF_H_
#define _HCONF_H_
enum hconf_input_mode {
HCONF_INPUT_MODE_MOUSE = 0x0,
HCONF_INPUT_MODE_MT_TOUCHSCREEN = 0x2,
HCONF_INPUT_MODE_MT_TOUCHPAD = 0x3,
};
int hconf_set_input_mode(device_t, enum hconf_input_mode);
#endif /* _HCONF_H_ */

3
sys/modules/hid/Makefile
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@ -5,4 +5,7 @@ SUBDIR = \
hidbus \
hidquirk
SUBDIR += \
hconf
.include <bsd.subdir.mk>

9
sys/modules/hid/hconf/Makefile Normal file
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@ -0,0 +1,9 @@
# $FreeBSD$
.PATH: ${SRCTOP}/sys/dev/hid
KMOD= hconf
SRCS= hconf.c
SRCS+= bus_if.h device_if.h
.include <bsd.kmod.mk>