/*- * Copyright (c) 2014-2017 Vladimir Kondratyev * 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 /* * MS Windows 7/8/10 compatible USB HID Multi-touch Device driver. * https://msdn.microsoft.com/en-us/library/windows/hardware/jj151569(v=vs.85).aspx * https://www.kernel.org/doc/Documentation/input/multi-touch-protocol.txt */ #include #include #include #include #include #include #include #include #include #include #include #include #include "usbdevs.h" #include #include #include #include #include #include #include #define USB_DEBUG_VAR wmt_debug #include static SYSCTL_NODE(_hw_usb, OID_AUTO, wmt, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, "USB MSWindows 7/8/10 compatible Multi-touch Device"); #ifdef USB_DEBUG static int wmt_debug = 0; SYSCTL_INT(_hw_usb_wmt, OID_AUTO, debug, CTLFLAG_RWTUN, &wmt_debug, 1, "Debug level"); #endif static bool wmt_timestamps = 0; SYSCTL_BOOL(_hw_usb_wmt, OID_AUTO, timestamps, CTLFLAG_RDTUN, &wmt_timestamps, 1, "Enable hardware timestamp reporting"); #define WMT_BSIZE 1024 /* bytes, buffer size */ #define WMT_BTN_MAX 8 /* Number of buttons supported */ enum { WMT_INTR_DT, WMT_N_TRANSFER, }; enum wmt_type { WMT_TYPE_UNKNOWN = 0, /* HID report descriptor is not probed */ WMT_TYPE_UNSUPPORTED, /* Repdescr does not belong to MT device */ WMT_TYPE_TOUCHPAD, WMT_TYPE_TOUCHSCREEN, }; enum wmt_input_mode { WMT_INPUT_MODE_MOUSE = 0x0, WMT_INPUT_MODE_MT_TOUCHSCREEN = 0x2, WMT_INPUT_MODE_MT_TOUCHPAD = 0x3, }; enum { WMT_TIP_SWITCH = ABS_MT_INDEX(ABS_MT_TOOL_TYPE), WMT_WIDTH = ABS_MT_INDEX(ABS_MT_TOUCH_MAJOR), WMT_HEIGHT = ABS_MT_INDEX(ABS_MT_TOUCH_MINOR), WMT_ORIENTATION = ABS_MT_INDEX(ABS_MT_ORIENTATION), WMT_X = ABS_MT_INDEX(ABS_MT_POSITION_X), WMT_Y = ABS_MT_INDEX(ABS_MT_POSITION_Y), WMT_CONTACTID = ABS_MT_INDEX(ABS_MT_TRACKING_ID), WMT_PRESSURE = ABS_MT_INDEX(ABS_MT_PRESSURE), WMT_IN_RANGE = ABS_MT_INDEX(ABS_MT_DISTANCE), WMT_CONFIDENCE = ABS_MT_INDEX(ABS_MT_BLOB_ID), WMT_TOOL_X = ABS_MT_INDEX(ABS_MT_TOOL_X), WMT_TOOL_Y = ABS_MT_INDEX(ABS_MT_TOOL_Y), }; #define WMT_N_USAGES MT_CNT #define WMT_NO_USAGE -1 struct wmt_hid_map_item { char name[5]; int32_t usage; /* HID usage */ bool reported; /* Item value is passed to evdev */ bool required; /* Required for MT Digitizers */ }; static const struct wmt_hid_map_item wmt_hid_map[WMT_N_USAGES] = { [WMT_TIP_SWITCH] = { .name = "TIP", .usage = HID_USAGE2(HUP_DIGITIZERS, HUD_TIP_SWITCH), .reported = false, .required = true, }, [WMT_WIDTH] = { .name = "WDTH", .usage = HID_USAGE2(HUP_DIGITIZERS, HUD_WIDTH), .reported = true, .required = false, }, [WMT_HEIGHT] = { .name = "HGHT", .usage = HID_USAGE2(HUP_DIGITIZERS, HUD_HEIGHT), .reported = true, .required = false, }, [WMT_ORIENTATION] = { .name = "ORIE", .usage = WMT_NO_USAGE, .reported = true, .required = false, }, [WMT_X] = { .name = "X", .usage = HID_USAGE2(HUP_GENERIC_DESKTOP, HUG_X), .reported = true, .required = true, }, [WMT_Y] = { .name = "Y", .usage = HID_USAGE2(HUP_GENERIC_DESKTOP, HUG_Y), .reported = true, .required = true, }, [WMT_CONTACTID] = { .name = "C_ID", .usage = HID_USAGE2(HUP_DIGITIZERS, HUD_CONTACTID), .reported = true, .required = true, }, [WMT_PRESSURE] = { .name = "PRES", .usage = HID_USAGE2(HUP_DIGITIZERS, HUD_TIP_PRESSURE), .reported = true, .required = false, }, [WMT_IN_RANGE] = { .name = "RANG", .usage = HID_USAGE2(HUP_DIGITIZERS, HUD_IN_RANGE), .reported = true, .required = false, }, [WMT_CONFIDENCE] = { .name = "CONF", .usage = HID_USAGE2(HUP_DIGITIZERS, HUD_CONFIDENCE), .reported = false, .required = false, }, [WMT_TOOL_X] = { /* Shares HID usage with WMT_X */ .name = "TL_X", .usage = HID_USAGE2(HUP_GENERIC_DESKTOP, HUG_X), .reported = true, .required = false, }, [WMT_TOOL_Y] = { /* Shares HID usage with WMT_Y */ .name = "TL_Y", .usage = HID_USAGE2(HUP_GENERIC_DESKTOP, HUG_Y), .reported = true, .required = false, }, }; struct wmt_absinfo { int32_t min; int32_t max; int32_t res; }; struct wmt_softc { device_t dev; enum wmt_type type; int32_t cont_count_max; struct mtx mtx; struct wmt_absinfo ai[WMT_N_USAGES]; struct hid_location locs[MAX_MT_SLOTS][WMT_N_USAGES]; struct hid_location cont_count_loc; struct hid_location btn_loc[WMT_BTN_MAX]; struct hid_location int_btn_loc; struct hid_location scan_time_loc; int32_t scan_time_max; int32_t scan_time; int32_t timestamp; bool touch; bool prev_touch; struct usb_xfer *xfer[WMT_N_TRANSFER]; struct evdev_dev *evdev; union evdev_mt_slot slot_data; uint8_t caps[howmany(WMT_N_USAGES, 8)]; uint8_t buttons[howmany(WMT_BTN_MAX, 8)]; uint32_t isize; uint32_t nconts_per_report; uint32_t nconts_todo; uint32_t report_len; uint8_t report_id; uint32_t max_button; bool has_int_button; bool is_clickpad; bool do_timestamps; struct hid_location cont_max_loc; uint32_t cont_max_rlen; uint8_t cont_max_rid; struct hid_location btn_type_loc; uint32_t btn_type_rlen; uint8_t btn_type_rid; uint32_t thqa_cert_rlen; uint8_t thqa_cert_rid; struct hid_location input_mode_loc; uint32_t input_mode_rlen; uint8_t input_mode_rid; uint8_t buf[WMT_BSIZE] __aligned(4); }; #define WMT_FOREACH_USAGE(caps, usage) \ for ((usage) = 0; (usage) < WMT_N_USAGES; ++(usage)) \ if (isset((caps), (usage))) static enum wmt_type wmt_hid_parse(struct wmt_softc *, const void *, uint16_t); static int wmt_set_input_mode(struct wmt_softc *, enum wmt_input_mode); static usb_callback_t wmt_intr_callback; static device_probe_t wmt_probe; static device_attach_t wmt_attach; static device_detach_t wmt_detach; static evdev_open_t wmt_ev_open; static evdev_close_t wmt_ev_close; static const struct evdev_methods wmt_evdev_methods = { .ev_open = &wmt_ev_open, .ev_close = &wmt_ev_close, }; static const struct usb_config wmt_config[WMT_N_TRANSFER] = { [WMT_INTR_DT] = { .type = UE_INTERRUPT, .endpoint = UE_ADDR_ANY, .direction = UE_DIR_IN, .flags = { .pipe_bof = 1, .short_xfer_ok = 1 }, .bufsize = WMT_BSIZE, .callback = &wmt_intr_callback, }, }; static int wmt_probe(device_t dev) { struct usb_attach_arg *uaa = device_get_ivars(dev); struct wmt_softc *sc = device_get_softc(dev); void *d_ptr; uint16_t d_len; int err; if (uaa->usb_mode != USB_MODE_HOST) return (ENXIO); if (uaa->info.bInterfaceClass != UICLASS_HID) return (ENXIO); if (usb_test_quirk(uaa, UQ_WMT_IGNORE)) return (ENXIO); err = usbd_req_get_hid_desc(uaa->device, NULL, &d_ptr, &d_len, M_TEMP, uaa->info.bIfaceIndex); if (err) return (ENXIO); /* Check if report descriptor belongs to a HID multitouch device */ if (sc->type == WMT_TYPE_UNKNOWN) sc->type = wmt_hid_parse(sc, d_ptr, d_len); if (sc->type != WMT_TYPE_UNSUPPORTED) err = BUS_PROBE_DEFAULT; else err = ENXIO; /* Check HID report length */ if (sc->type != WMT_TYPE_UNSUPPORTED && (sc->isize <= 0 || sc->isize > WMT_BSIZE)) { DPRINTF("Input size invalid or too large: %d\n", sc->isize); err = ENXIO; } free(d_ptr, M_TEMP); return (err); } static int wmt_attach(device_t dev) { struct usb_attach_arg *uaa = device_get_ivars(dev); struct wmt_softc *sc = device_get_softc(dev); uint32_t cont_count_max; int nbuttons, btn; size_t i; int err; device_set_usb_desc(dev); sc->dev = dev; /* Fetch and parse "Contact count maximum" feature report */ if (sc->cont_max_rlen > 0 && sc->cont_max_rlen <= WMT_BSIZE) { err = usbd_req_get_report(uaa->device, NULL, sc->buf, sc->cont_max_rlen, uaa->info.bIfaceIndex, UHID_FEATURE_REPORT, sc->cont_max_rid); if (err == USB_ERR_NORMAL_COMPLETION) { cont_count_max = hid_get_udata(sc->buf + 1, sc->cont_max_rlen - 1, &sc->cont_max_loc); /* * Feature report is a primary source of * 'Contact Count Maximum' */ if (cont_count_max > 0) sc->cont_count_max = cont_count_max; } else DPRINTF("usbd_req_get_report error=(%s)\n", usbd_errstr(err)); } else DPRINTF("Feature report %hhu size invalid or too large: %u\n", sc->cont_max_rid, sc->cont_max_rlen); /* Fetch and parse "Button type" feature report */ if (sc->btn_type_rlen > 1 && sc->btn_type_rlen <= WMT_BSIZE && sc->btn_type_rid != sc->cont_max_rid) { bzero(sc->buf, sc->btn_type_rlen); err = usbd_req_get_report(uaa->device, NULL, sc->buf, sc->btn_type_rlen, uaa->info.bIfaceIndex, UHID_FEATURE_REPORT, sc->btn_type_rid); } if (sc->btn_type_rlen > 1) { if (err == 0) sc->is_clickpad = hid_get_udata(sc->buf + 1, sc->btn_type_rlen - 1, &sc->btn_type_loc) == 0; else DPRINTF("usbd_req_get_report error=%d\n", err); } /* Fetch THQA certificate to enable some devices like WaveShare */ if (sc->thqa_cert_rlen > 0 && sc->thqa_cert_rlen <= WMT_BSIZE && sc->thqa_cert_rid != sc->cont_max_rid) (void)usbd_req_get_report(uaa->device, NULL, sc->buf, sc->thqa_cert_rlen, uaa->info.bIfaceIndex, UHID_FEATURE_REPORT, sc->thqa_cert_rid); /* Switch touchpad in to absolute multitouch mode */ if (sc->type == WMT_TYPE_TOUCHPAD) { err = wmt_set_input_mode(sc, WMT_INPUT_MODE_MT_TOUCHPAD); if (err != 0) DPRINTF("Failed to set input mode: %d\n", err); } /* Cap contact count maximum to MAX_MT_SLOTS */ if (sc->cont_count_max > MAX_MT_SLOTS) { DPRINTF("Hardware reported %d contacts while only %d is " "supported\n", (int)sc->cont_count_max, MAX_MT_SLOTS); sc->cont_count_max = MAX_MT_SLOTS; } if (/*usb_test_quirk(hw, UQ_MT_TIMESTAMP) ||*/ wmt_timestamps) sc->do_timestamps = true; mtx_init(&sc->mtx, "wmt lock", NULL, MTX_DEF); err = usbd_transfer_setup(uaa->device, &uaa->info.bIfaceIndex, sc->xfer, wmt_config, WMT_N_TRANSFER, sc, &sc->mtx); if (err != USB_ERR_NORMAL_COMPLETION) { DPRINTF("usbd_transfer_setup error=%s\n", usbd_errstr(err)); goto detach; } sc->evdev = evdev_alloc(); evdev_set_name(sc->evdev, device_get_desc(dev)); evdev_set_phys(sc->evdev, device_get_nameunit(dev)); evdev_set_id(sc->evdev, BUS_USB, uaa->info.idVendor, uaa->info.idProduct, 0); evdev_set_serial(sc->evdev, usb_get_serial(uaa->device)); evdev_set_methods(sc->evdev, sc, &wmt_evdev_methods); evdev_set_flag(sc->evdev, EVDEV_FLAG_MT_STCOMPAT); switch (sc->type) { case WMT_TYPE_TOUCHSCREEN: evdev_support_prop(sc->evdev, INPUT_PROP_DIRECT); break; case WMT_TYPE_TOUCHPAD: evdev_support_prop(sc->evdev, INPUT_PROP_POINTER); if (sc->is_clickpad) evdev_support_prop(sc->evdev, INPUT_PROP_BUTTONPAD); break; default: KASSERT(0, ("wmt_attach: unsupported touch device type")); } evdev_support_event(sc->evdev, EV_SYN); evdev_support_event(sc->evdev, EV_ABS); if (sc->do_timestamps) { evdev_support_event(sc->evdev, EV_MSC); evdev_support_msc(sc->evdev, MSC_TIMESTAMP); } nbuttons = 0; if (sc->max_button != 0 || sc->has_int_button) { evdev_support_event(sc->evdev, EV_KEY); if (sc->has_int_button) evdev_support_key(sc->evdev, BTN_LEFT); for (btn = 0; btn < sc->max_button; ++btn) { if (isset(sc->buttons, btn)) { evdev_support_key(sc->evdev, BTN_MOUSE + btn); nbuttons++; } } } evdev_support_abs(sc->evdev, ABS_MT_SLOT, 0, sc->cont_count_max - 1, 0, 0, 0); WMT_FOREACH_USAGE(sc->caps, i) { if (wmt_hid_map[i].reported) evdev_support_abs(sc->evdev, ABS_MT_FIRST + i, sc->ai[i].min, sc->ai[i].max, 0, 0, sc->ai[i].res); } err = evdev_register_mtx(sc->evdev, &sc->mtx); if (err) goto detach; /* Announce information about the touch device */ device_printf(sc->dev, "Multitouch %s with %d external button%s%s\n", sc->type == WMT_TYPE_TOUCHSCREEN ? "touchscreen" : "touchpad", nbuttons, nbuttons != 1 ? "s" : "", sc->is_clickpad ? ", click-pad" : ""); device_printf(sc->dev, "%d contacts and [%s%s%s%s%s]. Report range [%d:%d] - [%d:%d]\n", (int)sc->cont_count_max, isset(sc->caps, WMT_IN_RANGE) ? "R" : "", isset(sc->caps, WMT_CONFIDENCE) ? "C" : "", isset(sc->caps, WMT_WIDTH) ? "W" : "", isset(sc->caps, WMT_HEIGHT) ? "H" : "", isset(sc->caps, WMT_PRESSURE) ? "P" : "", (int)sc->ai[WMT_X].min, (int)sc->ai[WMT_Y].min, (int)sc->ai[WMT_X].max, (int)sc->ai[WMT_Y].max); return (0); detach: wmt_detach(dev); return (ENXIO); } static int wmt_detach(device_t dev) { struct wmt_softc *sc = device_get_softc(dev); evdev_free(sc->evdev); usbd_transfer_unsetup(sc->xfer, WMT_N_TRANSFER); mtx_destroy(&sc->mtx); return (0); } static void wmt_process_report(struct wmt_softc *sc, uint8_t *buf, int len) { size_t usage; union evdev_mt_slot *slot_data; uint32_t cont, btn; uint32_t cont_count; uint32_t width; uint32_t height; uint32_t int_btn = 0; uint32_t left_btn = 0; int slot; uint32_t scan_time; int32_t delta; /* * "In Parallel mode, devices report all contact information in a * single packet. Each physical contact is represented by a logical * collection that is embedded in the top-level collection." * * Since additional contacts that were not present will still be in the * report with contactid=0 but contactids are zero-based, find * contactcount first. */ cont_count = hid_get_udata(buf, len, &sc->cont_count_loc); /* * "In Hybrid mode, the number of contacts that can be reported in one * report is less than the maximum number of contacts that the device * supports. For example, a device that supports a maximum of * 4 concurrent physical contacts, can set up its top-level collection * to deliver a maximum of two contacts in one report. If four contact * points are present, the device can break these up into two serial * reports that deliver two contacts each. * * "When a device delivers data in this manner, the Contact Count usage * value in the first report should reflect the total number of * contacts that are being delivered in the hybrid reports. The other * serial reports should have a contact count of zero (0)." */ if (cont_count != 0) sc->nconts_todo = cont_count; #ifdef USB_DEBUG DPRINTFN(6, "cont_count:%2u", (unsigned)cont_count); if (wmt_debug >= 6) { WMT_FOREACH_USAGE(sc->caps, usage) { if (wmt_hid_map[usage].usage != WMT_NO_USAGE) printf(" %-4s", wmt_hid_map[usage].name); } printf("\n"); } #endif /* Find the number of contacts reported in current report */ cont_count = MIN(sc->nconts_todo, sc->nconts_per_report); /* Use protocol Type B for reporting events */ for (cont = 0; cont < cont_count; cont++) { slot_data = &sc->slot_data; bzero(slot_data, sizeof(sc->slot_data)); WMT_FOREACH_USAGE(sc->caps, usage) { if (sc->locs[cont][usage].size > 0) slot_data->val[usage] = hid_get_udata( buf, len, &sc->locs[cont][usage]); } slot = evdev_mt_id_to_slot(sc->evdev, slot_data->id); #ifdef USB_DEBUG DPRINTFN(6, "cont%01x: data = ", cont); if (wmt_debug >= 6) { WMT_FOREACH_USAGE(sc->caps, usage) { if (wmt_hid_map[usage].usage != WMT_NO_USAGE) printf("%04x ", slot_data->val[usage]); } printf("slot = %d\n", slot); } #endif if (slot == -1) { DPRINTF("Slot overflow for contact_id %u\n", (unsigned)slot_data->id); continue; } if (slot_data->val[WMT_TIP_SWITCH] != 0 && !(isset(sc->caps, WMT_CONFIDENCE) && slot_data->val[WMT_CONFIDENCE] == 0)) { /* This finger is in proximity of the sensor */ sc->touch = true; slot_data->dist = !slot_data->val[WMT_IN_RANGE]; /* Divided by two to match visual scale of touch */ width = slot_data->val[WMT_WIDTH] >> 1; height = slot_data->val[WMT_HEIGHT] >> 1; slot_data->ori = width > height; slot_data->maj = MAX(width, height); slot_data->min = MIN(width, height); } else slot_data = NULL; evdev_mt_push_slot(sc->evdev, slot, slot_data); } sc->nconts_todo -= cont_count; if (sc->do_timestamps && sc->nconts_todo == 0) { /* HUD_SCAN_TIME is measured in 100us, convert to us. */ scan_time = hid_get_udata(buf, len, &sc->scan_time_loc); if (sc->prev_touch) { delta = scan_time - sc->scan_time; if (delta < 0) delta += sc->scan_time_max; } else delta = 0; sc->scan_time = scan_time; sc->timestamp += delta * 100; evdev_push_msc(sc->evdev, MSC_TIMESTAMP, sc->timestamp); sc->prev_touch = sc->touch; sc->touch = false; if (!sc->prev_touch) sc->timestamp = 0; } if (sc->nconts_todo == 0) { /* Report both the click and external left btns as BTN_LEFT */ if (sc->has_int_button) int_btn = hid_get_data(buf, len, &sc->int_btn_loc); if (isset(sc->buttons, 0)) left_btn = hid_get_data(buf, len, &sc->btn_loc[0]); if (sc->has_int_button || isset(sc->buttons, 0)) evdev_push_key(sc->evdev, BTN_LEFT, (int_btn != 0) | (left_btn != 0)); for (btn = 1; btn < sc->max_button; ++btn) { if (isset(sc->buttons, btn)) evdev_push_key(sc->evdev, BTN_MOUSE + btn, hid_get_data(buf, len, &sc->btn_loc[btn]) != 0); } evdev_sync(sc->evdev); } } static void wmt_intr_callback(struct usb_xfer *xfer, usb_error_t error) { struct wmt_softc *sc = usbd_xfer_softc(xfer); struct usb_page_cache *pc; uint8_t *buf = sc->buf; 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); DPRINTFN(6, "sc=%p actlen=%d\n", sc, len); if (len >= (int)sc->report_len || (len > 0 && sc->report_id != 0)) { /* Limit report length to the maximum */ if (len > (int)sc->report_len) len = sc->report_len; usbd_copy_out(pc, 0, buf, len); /* Ignore irrelevant reports */ if (sc->report_id && *buf != sc->report_id) goto tr_ignore; /* Make sure we don't process old data */ if (len < sc->report_len) bzero(buf + len, sc->report_len - len); /* Strip leading "report ID" byte */ if (sc->report_id) { len--; buf++; } wmt_process_report(sc, buf, len); } else { tr_ignore: DPRINTF("Ignored transfer, %d bytes\n", len); } case USB_ST_SETUP: tr_setup: usbd_xfer_set_frame_len(xfer, 0, sc->isize); usbd_transfer_submit(xfer); break; default: if (error != USB_ERR_CANCELLED) { /* Try clear stall first */ usbd_xfer_set_stall(xfer); goto tr_setup; } break; } } static void wmt_ev_close_11(struct evdev_dev *evdev, void *ev_softc) { struct wmt_softc *sc = ev_softc; mtx_assert(&sc->mtx, MA_OWNED); usbd_transfer_stop(sc->xfer[WMT_INTR_DT]); } static int wmt_ev_open_11(struct evdev_dev *evdev, void *ev_softc) { struct wmt_softc *sc = ev_softc; mtx_assert(&sc->mtx, MA_OWNED); usbd_transfer_start(sc->xfer[WMT_INTR_DT]); return (0); } static int wmt_ev_close(struct evdev_dev *evdev) { struct wmt_softc *sc = evdev_get_softc(evdev); wmt_ev_close_11(evdev, sc); return (0); } static int wmt_ev_open(struct evdev_dev *evdev) { struct wmt_softc *sc = evdev_get_softc(evdev); return (wmt_ev_open_11(evdev, sc)); } static enum wmt_type wmt_hid_parse(struct wmt_softc *sc, const void *d_ptr, uint16_t d_len) { struct hid_item hi; struct hid_data *hd; size_t i; size_t cont = 0; enum wmt_type type = WMT_TYPE_UNSUPPORTED; uint32_t left_btn, btn; int32_t cont_count_max = 0; uint8_t report_id = 0; bool touch_coll = false; bool finger_coll = false; bool cont_count_found = false; bool scan_time_found = false; bool has_int_button = false; #define WMT_HI_ABSOLUTE(hi) \ (((hi).flags & (HIO_CONST|HIO_VARIABLE|HIO_RELATIVE)) == HIO_VARIABLE) #define HUMS_THQA_CERT 0xC5 /* Parse features for maximum contact count */ hd = hid_start_parse(d_ptr, d_len, 1 << hid_feature); while (hid_get_item(hd, &hi)) { switch (hi.kind) { case hid_collection: if (hi.collevel == 1 && hi.usage == HID_USAGE2(HUP_DIGITIZERS, HUD_TOUCHSCREEN)) { touch_coll = true; type = WMT_TYPE_TOUCHSCREEN; left_btn = 1; break; } if (hi.collevel == 1 && hi.usage == HID_USAGE2(HUP_DIGITIZERS, HUD_TOUCHPAD)) { touch_coll = true; type = WMT_TYPE_TOUCHPAD; left_btn = 2; } break; case hid_endcollection: if (hi.collevel == 0 && touch_coll) touch_coll = false; break; case hid_feature: if (hi.collevel == 1 && touch_coll && hi.usage == HID_USAGE2(HUP_MICROSOFT, HUMS_THQA_CERT)) { sc->thqa_cert_rid = hi.report_ID; break; } if (hi.collevel == 1 && touch_coll && hi.usage == HID_USAGE2(HUP_DIGITIZERS, HUD_CONTACT_MAX)) { cont_count_max = hi.logical_maximum; sc->cont_max_rid = hi.report_ID; sc->cont_max_loc = hi.loc; break; } if (hi.collevel == 1 && touch_coll && hi.usage == HID_USAGE2(HUP_DIGITIZERS, HUD_BUTTON_TYPE)) { sc->btn_type_rid = hi.report_ID; sc->btn_type_loc = hi.loc; } break; default: break; } } hid_end_parse(hd); if (type == WMT_TYPE_UNSUPPORTED) return (WMT_TYPE_UNSUPPORTED); /* Maximum contact count is required usage */ if (sc->cont_max_rid == 0) return (WMT_TYPE_UNSUPPORTED); touch_coll = false; /* Parse input for other parameters */ hd = hid_start_parse(d_ptr, d_len, 1 << hid_input); while (hid_get_item(hd, &hi)) { switch (hi.kind) { case hid_collection: if (hi.collevel == 1 && hi.usage == HID_USAGE2(HUP_DIGITIZERS, HUD_TOUCHSCREEN)) touch_coll = true; else if (touch_coll && hi.collevel == 2 && (report_id == 0 || report_id == hi.report_ID) && hi.usage == HID_USAGE2(HUP_DIGITIZERS, HUD_FINGER)) finger_coll = true; break; case hid_endcollection: if (hi.collevel == 1 && finger_coll) { finger_coll = false; cont++; } else if (hi.collevel == 0 && touch_coll) touch_coll = false; break; case hid_input: /* * Ensure that all usages are located within the same * report and proper collection. */ if (WMT_HI_ABSOLUTE(hi) && touch_coll && (report_id == 0 || report_id == hi.report_ID)) report_id = hi.report_ID; else break; if (hi.collevel == 1 && left_btn == 2 && hi.usage == HID_USAGE2(HUP_BUTTON, 1)) { has_int_button = true; sc->int_btn_loc = hi.loc; break; } if (hi.collevel == 1 && hi.usage >= HID_USAGE2(HUP_BUTTON, left_btn) && hi.usage <= HID_USAGE2(HUP_BUTTON, WMT_BTN_MAX)) { btn = (hi.usage & 0xFFFF) - left_btn; setbit(sc->buttons, btn); sc->btn_loc[btn] = hi.loc; if (btn >= sc->max_button) sc->max_button = btn + 1; break; } if (hi.collevel == 1 && hi.usage == HID_USAGE2(HUP_DIGITIZERS, HUD_CONTACTCOUNT)) { cont_count_found = true; sc->cont_count_loc = hi.loc; break; } /* Scan time is required but clobbered by evdev */ if (hi.collevel == 1 && hi.usage == HID_USAGE2(HUP_DIGITIZERS, HUD_SCAN_TIME)) { scan_time_found = true; sc->scan_time_loc = hi.loc; sc->scan_time_max = hi.logical_maximum; break; } if (!finger_coll || hi.collevel != 2) break; if (cont >= MAX_MT_SLOTS) { DPRINTF("Finger %zu ignored\n", cont); break; } for (i = 0; i < WMT_N_USAGES; i++) { if (hi.usage == wmt_hid_map[i].usage) { /* * HUG_X usage is an array mapped to * both ABS_MT_POSITION and ABS_MT_TOOL * events. So don`t stop search if we * already have HUG_X mapping done. */ if (sc->locs[cont][i].size) continue; sc->locs[cont][i] = hi.loc; /* * Hid parser returns valid logical and * physical sizes for first finger only * at least on ElanTS 0x04f3:0x0012. */ if (cont > 0) break; setbit(sc->caps, i); sc->ai[i] = (struct wmt_absinfo) { .max = hi.logical_maximum, .min = hi.logical_minimum, .res = hid_item_resolution(&hi), }; break; } } break; default: break; } } hid_end_parse(hd); /* Check for required HID Usages */ if (!cont_count_found || !scan_time_found || cont == 0) return (WMT_TYPE_UNSUPPORTED); for (i = 0; i < WMT_N_USAGES; i++) { if (wmt_hid_map[i].required && isclr(sc->caps, i)) return (WMT_TYPE_UNSUPPORTED); } /* Touchpads must have at least one button */ if (type == WMT_TYPE_TOUCHPAD && !sc->max_button && !has_int_button) return (WMT_TYPE_UNSUPPORTED); /* * According to specifications 'Contact Count Maximum' should be read * from Feature Report rather than from HID descriptor. Set sane * default value now to handle the case of 'Get Report' request failure */ if (cont_count_max < 1) cont_count_max = cont; /* Report touch orientation if both width and height are supported */ if (isset(sc->caps, WMT_WIDTH) && isset(sc->caps, WMT_HEIGHT)) { setbit(sc->caps, WMT_ORIENTATION); sc->ai[WMT_ORIENTATION].max = 1; } sc->isize = hid_report_size_max(d_ptr, d_len, hid_input, NULL); sc->report_len = hid_report_size(d_ptr, d_len, hid_input, report_id); sc->cont_max_rlen = hid_report_size(d_ptr, d_len, hid_feature, sc->cont_max_rid); if (sc->btn_type_rid > 0) sc->btn_type_rlen = hid_report_size(d_ptr, d_len, hid_feature, sc->btn_type_rid); if (sc->thqa_cert_rid > 0) sc->thqa_cert_rlen = hid_report_size(d_ptr, d_len, hid_feature, sc->thqa_cert_rid); sc->report_id = report_id; sc->nconts_per_report = cont; sc->has_int_button = has_int_button; sc->cont_count_max = cont_count_max; return (type); } static int wmt_set_input_mode(struct wmt_softc *sc, enum wmt_input_mode mode) { struct usb_attach_arg *uaa = device_get_ivars(sc->dev); int err; if (sc->input_mode_rlen < 3 || sc->input_mode_rlen > WMT_BSIZE) { DPRINTF("Feature report %hhu size invalid or too large: %u\n", sc->input_mode_rid, sc->input_mode_rlen); return (USB_ERR_BAD_BUFSIZE); } /* Input Mode report is not strictly required to be readable */ err = usbd_req_get_report(uaa->device, NULL, sc->buf, sc->input_mode_rlen, uaa->info.bIfaceIndex, UHID_FEATURE_REPORT, sc->input_mode_rid); if (err != USB_ERR_NORMAL_COMPLETION) bzero(sc->buf + 1, sc->input_mode_rlen - 1); sc->buf[0] = sc->input_mode_rid; hid_put_udata(sc->buf + 1, sc->input_mode_rlen - 1, &sc->input_mode_loc, mode); err = usbd_req_set_report(uaa->device, NULL, sc->buf, sc->input_mode_rlen, uaa->info.bIfaceIndex, UHID_FEATURE_REPORT, sc->input_mode_rid); return (err); } static const STRUCT_USB_HOST_ID wmt_devs[] = { /* generic HID class w/o boot interface */ {USB_IFACE_CLASS(UICLASS_HID), USB_IFACE_SUBCLASS(0),}, }; static devclass_t wmt_devclass; static device_method_t wmt_methods[] = { DEVMETHOD(device_probe, wmt_probe), DEVMETHOD(device_attach, wmt_attach), DEVMETHOD(device_detach, wmt_detach), DEVMETHOD_END }; static driver_t wmt_driver = { .name = "wmt", .methods = wmt_methods, .size = sizeof(struct wmt_softc), }; DRIVER_MODULE(wmt, uhub, wmt_driver, wmt_devclass, NULL, 0); MODULE_DEPEND(wmt, usb, 1, 1, 1); MODULE_DEPEND(wmt, hid, 1, 1, 1); MODULE_DEPEND(wmt, evdev, 1, 1, 1); MODULE_VERSION(wmt, 1); USB_PNP_HOST_INFO(wmt_devs);