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/* $NetBSD: ims.c,v 1.5 2023/05/10 00:10:02 riastradh Exp $ */
/* $OpenBSD ims.c,v 1.1 2016/01/12 01:11:15 jcs Exp $ */
/*
* HID-over-i2c mouse/trackpad driver
*
* Copyright (c) 2015, 2016 joshua stein <jcs@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ims.c,v 1.5 2023/05/10 00:10:02 riastradh Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/ioctl.h>
#include <dev/i2c/i2cvar.h>
#include <dev/i2c/ihidev.h>
#include <dev/hid/hid.h>
#include <dev/hid/hidms.h>
struct ims_softc {
struct ihidev sc_hdev;
struct hidms sc_ms;
bool sc_enabled;
};
static void ims_intr(struct ihidev *addr, void *ibuf, u_int len);
static int ims_enable(void *);
static void ims_disable(void *);
static int ims_ioctl(void *, u_long, void *, int, struct lwp *);
const struct wsmouse_accessops ims_accessops = {
ims_enable,
ims_ioctl,
ims_disable,
};
static int ims_match(device_t, cfdata_t, void *);
static void ims_attach(device_t, device_t, void *);
static int ims_detach(device_t, int);
static void ims_childdet(device_t, device_t);
CFATTACH_DECL2_NEW(ims, sizeof(struct ims_softc), ims_match, ims_attach,
ims_detach, NULL, NULL, ims_childdet);
static int
ims_match(device_t parent, cfdata_t match, void *aux)
{
struct ihidev_attach_arg *iha = (struct ihidev_attach_arg *)aux;
int size;
void *desc;
ihidev_get_report_desc(iha->parent, &desc, &size);
if (hid_is_collection(desc, size, iha->reportid,
HID_USAGE2(HUP_GENERIC_DESKTOP, HUG_POINTER)))
return (IMATCH_IFACECLASS);
if (hid_is_collection(desc, size, iha->reportid,
HID_USAGE2(HUP_GENERIC_DESKTOP, HUG_MOUSE)))
return (IMATCH_IFACECLASS);
if (hid_is_collection(desc, size, iha->reportid,
HID_USAGE2(HUP_DIGITIZERS, HUD_PEN)))
return (IMATCH_IFACECLASS);
if (hid_is_collection(desc, size, iha->reportid,
HID_USAGE2(HUP_DIGITIZERS, HUD_TOUCH_SCREEN)))
return (IMATCH_IFACECLASS);
return (IMATCH_NONE);
}
static void
ims_attach(device_t parent, device_t self, void *aux)
{
struct ims_softc *sc = device_private(self);
struct hidms *ms = &sc->sc_ms;
struct ihidev_attach_arg *iha = (struct ihidev_attach_arg *)aux;
int size, repid;
void *desc;
struct hid_data * d __debugused;
struct hid_item item __debugused;
sc->sc_hdev.sc_idev = self;
sc->sc_hdev.sc_intr = ims_intr;
sc->sc_hdev.sc_parent = iha->parent;
sc->sc_hdev.sc_report_id = iha->reportid;
if (!pmf_device_register(self, NULL, NULL))
aprint_error_dev(self, "couldn't establish power handler\n");
ihidev_get_report_desc(iha->parent, &desc, &size);
repid = iha->reportid;
sc->sc_hdev.sc_isize = hid_report_size(desc, size, hid_input, repid);
sc->sc_hdev.sc_osize = hid_report_size(desc, size, hid_output, repid);
sc->sc_hdev.sc_fsize = hid_report_size(desc, size, hid_feature, repid);
if (!hidms_setup(self, ms, iha->reportid, desc, size) != 0)
return;
#if defined(DEBUG)
/* calibrate the touchscreen */
memset(&sc->sc_ms.sc_calibcoords, 0, sizeof(sc->sc_ms.sc_calibcoords));
d = hid_start_parse(desc, size, hid_input);
if (d != NULL) {
while (hid_get_item(d, &item)) {
if (item.kind != hid_input
|| HID_GET_USAGE_PAGE(item.usage) != HUP_GENERIC_DESKTOP
|| item.report_ID != sc->sc_hdev.sc_report_id)
continue;
if (HID_GET_USAGE(item.usage) == HUG_X) {
aprint_normal("X range: %d - %d\n", item.logical_minimum, item.logical_maximum);
}
if (HID_GET_USAGE(item.usage) == HUG_Y) {
aprint_normal("Y range: %d - %d\n", item.logical_minimum, item.logical_maximum);
}
}
hid_end_parse(d);
}
#endif
tpcalib_init(&sc->sc_ms.sc_tpcalib);
tpcalib_ioctl(&sc->sc_ms.sc_tpcalib, WSMOUSEIO_SCALIBCOORDS,
(void *)&sc->sc_ms.sc_calibcoords, 0, 0);
hidms_attach(self, ms, &ims_accessops);
}
static int
ims_detach(device_t self, int flags)
{
int error;
/* No need to do reference counting of ums, wsmouse has all the goo. */
error = config_detach_children(self, flags);
if (error)
return error;
pmf_device_deregister(self);
return 0;
}
void
ims_childdet(device_t self, device_t child)
{
struct ims_softc *sc = device_private(self);
KASSERT(KERNEL_LOCKED_P());
KASSERT(sc->sc_ms.hidms_wsmousedev == child);
sc->sc_ms.hidms_wsmousedev = NULL;
}
static void
ims_intr(struct ihidev *addr, void *buf, u_int len)
{
struct ims_softc *sc = (struct ims_softc *)addr;
struct hidms *ms = &sc->sc_ms;
if (sc->sc_enabled)
hidms_intr(ms, buf, len);
}
static int
ims_enable(void *v)
{
struct ims_softc *sc = v;
int error;
KASSERT(KERNEL_LOCKED_P());
if (sc->sc_enabled)
return EBUSY;
sc->sc_enabled = 1;
sc->sc_ms.hidms_buttons = 0;
error = ihidev_open(&sc->sc_hdev);
if (error)
sc->sc_enabled = 0;
return error;
}
static void
ims_disable(void *v)
{
struct ims_softc *sc = v;
KASSERT(KERNEL_LOCKED_P());
#ifdef DIAGNOSTIC
if (!sc->sc_enabled) {
printf("ums_disable: not enabled\n");
return;
}
#endif
if (sc->sc_enabled) {
sc->sc_enabled = 0;
ihidev_close(&sc->sc_hdev);
}
}
static int
ims_ioctl(void *v, u_long cmd, void *data, int flag, struct lwp *l)
{
struct ims_softc *sc = v;
switch (cmd) {
case WSMOUSEIO_GTYPE:
if (sc->sc_ms.flags & HIDMS_ABS) {
*(u_int *)data = WSMOUSE_TYPE_TPANEL;
} else {
/* XXX: should we set something else? */
*(u_int *)data = WSMOUSE_TYPE_USB;
}
return 0;
case WSMOUSEIO_SCALIBCOORDS:
case WSMOUSEIO_GCALIBCOORDS:
return tpcalib_ioctl(&sc->sc_ms.sc_tpcalib, cmd, data, flag, l);
}
return EPASSTHROUGH;
}
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