/* $OpenBSD: umt.c,v 1.1 2018/08/25 20:31:31 jcs Exp $ */ /* * USB multitouch touchpad driver for devices conforming to * Windows Precision Touchpad standard * * https://msdn.microsoft.com/en-us/library/windows/hardware/dn467314%28v=vs.85%29.aspx * * Copyright (c) 2016-2018 joshua stein * * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include struct umt_softc { struct uhidev sc_hdev; struct hidmt sc_mt; int sc_rep_input; int sc_rep_config; int sc_rep_cap; }; int umt_enable(void *); int umt_open(struct uhidev *); void umt_intr(struct uhidev *, void *, u_int); void umt_disable(void *); int umt_ioctl(void *, u_long, caddr_t, int, struct proc *); const struct wsmouse_accessops umt_accessops = { umt_enable, umt_ioctl, umt_disable, }; int umt_match(struct device *, void *, void *); int umt_find_winptp_reports(struct uhidev_softc *, void *, int, struct umt_softc *); void umt_attach(struct device *, struct device *, void *); int umt_hidev_get_report(struct device *, int, int, void *, int); int umt_hidev_set_report(struct device *, int, int, void *, int); int umt_detach(struct device *, int); struct cfdriver umt_cd = { NULL, "umt", DV_DULL }; const struct cfattach umt_ca = { sizeof(struct umt_softc), umt_match, umt_attach, umt_detach }; int umt_match(struct device *parent, void *match, void *aux) { struct uhidev_attach_arg *uha = (struct uhidev_attach_arg *)aux; int size; void *desc; if (uha->reportid == UHIDEV_CLAIM_ALLREPORTID) { uhidev_get_report_desc(uha->parent, &desc, &size); if (umt_find_winptp_reports(uha->parent, desc, size, NULL)) return (UMATCH_DEVCLASS_DEVSUBCLASS); } return (UMATCH_NONE); } int umt_find_winptp_reports(struct uhidev_softc *parent, void *desc, int size, struct umt_softc *sc) { int repid; int input = 0, conf = 0, cap = 0; if (sc != NULL) { sc->sc_rep_input = -1; sc->sc_rep_config = -1; sc->sc_rep_cap = -1; } for (repid = 0; repid < parent->sc_nrepid; repid++) { if (hid_report_size(desc, size, hid_input, repid) == 0 && hid_report_size(desc, size, hid_output, repid) == 0 && hid_report_size(desc, size, hid_feature, repid) == 0) continue; if (hid_is_collection(desc, size, repid, HID_USAGE2(HUP_DIGITIZERS, HUD_TOUCHPAD))) { input = 1; if (sc != NULL && sc->sc_rep_input == -1) sc->sc_rep_input = repid; } else if (hid_is_collection(desc, size, repid, HID_USAGE2(HUP_DIGITIZERS, HUD_CONFIG))) { conf = 1; if (sc != NULL && sc->sc_rep_config == -1) sc->sc_rep_config = repid; } /* capabilities report could be anywhere */ if (hid_locate(desc, size, HID_USAGE2(HUP_DIGITIZERS, HUD_CONTACT_MAX), repid, hid_feature, NULL, NULL)) { cap = 1; if (sc != NULL && sc->sc_rep_cap == -1) sc->sc_rep_cap = repid; } } return (conf && input && cap); } void umt_attach(struct device *parent, struct device *self, void *aux) { struct umt_softc *sc = (struct umt_softc *)self; struct hidmt *mt = &sc->sc_mt; struct uhidev_attach_arg *uha = (struct uhidev_attach_arg *)aux; int size; void *desc; sc->sc_hdev.sc_intr = umt_intr; sc->sc_hdev.sc_parent = uha->parent; uhidev_get_report_desc(uha->parent, &desc, &size); umt_find_winptp_reports(uha->parent, desc, size, sc); memset(mt, 0, sizeof(sc->sc_mt)); /* assume everything has "natural scrolling" where Y axis is reversed */ mt->sc_flags = HIDMT_REVY; mt->hidev_report_type_conv = uhidev_report_type_conv; mt->hidev_get_report = umt_hidev_get_report; mt->hidev_set_report = umt_hidev_set_report; mt->sc_rep_input = sc->sc_rep_input; mt->sc_rep_config = sc->sc_rep_config; mt->sc_rep_cap = sc->sc_rep_cap; if (hidmt_setup(self, mt, desc, size) != 0) return; hidmt_attach(mt, &umt_accessops); } int umt_hidev_get_report(struct device *self, int type, int id, void *data, int len) { struct umt_softc *sc = (struct umt_softc *)self; int ret; ret = uhidev_get_report(sc->sc_hdev.sc_parent, type, id, data, len); return (ret < len); } int umt_hidev_set_report(struct device *self, int type, int id, void *data, int len) { struct umt_softc *sc = (struct umt_softc *)self; int ret; ret = uhidev_set_report(sc->sc_hdev.sc_parent, type, id, data, len); return (ret < len); } int umt_detach(struct device *self, int flags) { struct umt_softc *sc = (struct umt_softc *)self; struct hidmt *mt = &sc->sc_mt; return hidmt_detach(mt, flags); } void umt_intr(struct uhidev *dev, void *buf, u_int len) { struct umt_softc *sc = (struct umt_softc *)dev; struct hidmt *mt = &sc->sc_mt; if (!mt->sc_enabled) return; hidmt_input(mt, (uint8_t *)buf, len); } int umt_enable(void *v) { struct umt_softc *sc = v; struct hidmt *mt = &sc->sc_mt; int rv; if ((rv = hidmt_enable(mt)) != 0) return rv; rv = uhidev_open(&sc->sc_hdev); hidmt_set_input_mode(mt, HIDMT_INPUT_MODE_MT_TOUCHPAD); return rv; } void umt_disable(void *v) { struct umt_softc *sc = v; struct hidmt *mt = &sc->sc_mt; hidmt_disable(mt); uhidev_close(&sc->sc_hdev); } int umt_ioctl(void *v, u_long cmd, caddr_t data, int flag, struct proc *p) { struct umt_softc *sc = v; struct hidmt *mt = &sc->sc_mt; int rc; rc = uhidev_ioctl(&sc->sc_hdev, cmd, data, flag, p); if (rc != -1) return rc; return hidmt_ioctl(mt, cmd, data, flag, p); }