/* $OpenBSD: uhidpp.c,v 1.27 2022/08/11 07:32:57 anton Exp $ */ /* * Copyright (c) 2021 Anton Lindqvist * * 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 /* #define UHIDPP_DEBUG */ #ifdef UHIDPP_DEBUG #define DPRINTF(x...) do { \ if (uhidpp_debug) \ printf(x); \ } while (0) #define DREPORT(prefix, repid, buf, len) do { \ if (uhidpp_debug) \ uhidd_dump_report((prefix), (repid), (buf), (len)); \ } while (0) void uhidd_dump_report(const char *, uint8_t, const unsigned char *, u_int); int uhidpp_debug = 1; #else #define DPRINTF(x...) #define DREPORT(prefix, repid, buf, len) #endif #define HIDPP_LINK_STATUS(x) ((x) & (1 << 7)) #define HIDPP_REPORT_ID_SHORT 0x10 #define HIDPP_REPORT_ID_LONG 0x11 /* * Length of reports. Note that the effective length is always +1 as * uhidev_set_report() prepends the report ID. */ #define HIDPP_REPORT_SHORT_LENGTH (7 - 1) #define HIDPP_REPORT_LONG_LENGTH (20 - 1) /* * Maximum number of allowed parameters for reports. Note, the parameters always * starts at offset 3 for both RAP and FAP reports. */ #define HIDPP_REPORT_SHORT_PARAMS_MAX (HIDPP_REPORT_SHORT_LENGTH - 3) #define HIDPP_REPORT_LONG_PARAMS_MAX (HIDPP_REPORT_LONG_LENGTH - 3) #define HIDPP_DEVICE_ID_RECEIVER 0xff #define HIDPP_FEAT_ROOT_IDX 0x00 #define HIDPP_FEAT_ROOT_PING_FUNC 0x01 #define HIDPP_FEAT_ROOT_PING_DATA 0x5a #define HIDPP_SET_REGISTER 0x80 #define HIDPP_GET_REGISTER 0x81 #define HIDPP_SET_LONG_REGISTER 0x82 #define HIDPP_GET_LONG_REGISTER 0x83 #define HIDPP_REG_ENABLE_REPORTS 0x00 #define HIDPP_REG_PAIRING_INFORMATION 0xb5 #define HIDPP_NOTIF_DEVICE_BATTERY_STATUS (1 << 4) #define HIDPP_NOTIF_RECEIVER_WIRELESS (1 << 0) #define HIDPP_NOTIF_RECEIVER_SOFTWARE_PRESENT (1 << 3) /* HID++ 1.0 error codes. */ #define HIDPP_ERROR 0x8f #define HIDPP_ERROR_SUCCESS 0x00 #define HIDPP_ERROR_INVALID_SUBID 0x01 #define HIDPP_ERROR_INVALID_ADRESS 0x02 #define HIDPP_ERROR_INVALID_VALUE 0x03 #define HIDPP_ERROR_CONNECT_FAIL 0x04 #define HIDPP_ERROR_TOO_MANY_DEVICES 0x05 #define HIDPP_ERROR_ALREADY_EXISTS 0x06 #define HIDPP_ERROR_BUSY 0x07 #define HIDPP_ERROR_UNKNOWN_DEVICE 0x08 #define HIDPP_ERROR_RESOURCE_ERROR 0x09 #define HIDPP_ERROR_REQUEST_UNAVAILABLE 0x0a #define HIDPP_ERROR_INVALID_PARAM_VALUE 0x0b #define HIDPP_ERROR_WRONG_PIN_CODE 0x0c /* * The software ID is added to feature access reports (FAP) and used to * distinguish responses from notifications. Note, the software ID must be * greater than zero which is reserved for notifications. */ #define HIDPP_SOFTWARE_ID 0x01 #define HIDPP_SOFTWARE_ID_LEN 4 #define HIDPP20_FEAT_ROOT_ID 0x0000 #define HIDPP20_FEAT_ROOT_GET_FEATURE_FUNC 0x0000 #define HIDPP20_FEAT_FEATURE_ID 0x0001 #define HIDPP20_FEAT_FEATURE_COUNT_FUNC 0x0000 #define HIDPP20_FEAT_FEATURE_ID_FUNC 0x0001 #define HIDPP20_FEAT_BATTERY_ID 0x1000 #define HIDPP20_FEAT_BATTERY_LEVEL_FUNC 0x0000 #define HIDPP20_FEAT_BATTERY_CAPABILITY_FUNC 0x0001 #define HIDPP20_BATTERY_STATUS_CHARGING_DONE 0x0003 #define HIDPP20_BATTERY_CAPABILITY_RECHARGEABLE 0x0004 /* HID++ 2.0 error codes. */ #define HIDPP20_ERROR 0xff #define HIDPP20_ERROR_NO_ERROR 0x00 #define HIDPP20_ERROR_UNKNOWN 0x01 #define HIDPP20_ERROR_INVALID_ARGUMENT 0x02 #define HIDPP20_ERROR_OUT_OF_RANGE 0x03 #define HIDPP20_ERROR_HARDWARE_ERROR 0x04 #define HIDPP20_ERROR_LOGITECH_INTERNAL 0x05 #define HIDPP20_ERROR_INVALID_FEATURE_INDEX 0x06 #define HIDPP20_ERROR_INVALID_FUNCTION_ID 0x07 #define HIDPP20_ERROR_BUSY 0x08 #define HIDPP20_ERROR_UNSUPPORTED 0x09 /* * Sentinels used for interrupt response synchronization. The values must be * disjoint from existing report IDs. */ #define UHIDPP_RESP_NONE 0 #define UHIDPP_RESP_WAIT 1 #define UHIDPP_RESP_ERROR 2 /* Maximum number of devices associated with a single receiver. */ #define UHIDPP_NDEVICES 6 /* Maximum number of pending notifications. */ #define UHIDPP_NNOTIFICATIONS 4 /* Number of sensors per paired device. */ #define UHIDPP_NSENSORS 3 /* Feature access report used by the HID++ 2.0 (and greater) protocol. */ struct fap { uint8_t feature_idx; uint8_t funcidx_swid; uint8_t params[HIDPP_REPORT_LONG_PARAMS_MAX]; }; /* * Register access report used by the HID++ 1.0 protocol. Receivers always uses * this type of report. */ struct rap { uint8_t sub_id; uint8_t reg_address; uint8_t params[HIDPP_REPORT_LONG_PARAMS_MAX]; }; struct uhidpp_report { uint8_t device_id; union { struct fap fap; struct rap rap; }; } __packed; struct uhidpp_notification { struct uhidpp_report n_rep; unsigned int n_id; }; struct uhidpp_device { uint8_t d_id; uint8_t d_connected; uint8_t d_major; uint8_t d_minor; uint8_t d_features; #define UHIDPP_DEVICE_FEATURE_ROOT 0x01 #define UHIDPP_DEVICE_FEATURE_BATTERY 0x02 struct { struct ksensor sens[UHIDPP_NSENSORS]; uint8_t feature_idx; uint8_t level; uint8_t status; uint8_t nlevels; uint8_t rechargeable; } d_battery; }; /* * Locking: * [m] sc_mtx */ struct uhidpp_softc { struct uhidev sc_hdev; struct usbd_device *sc_udev; struct mutex sc_mtx; struct uhidpp_device sc_devices[UHIDPP_NDEVICES]; /* [m] connected devices */ struct uhidpp_notification sc_notifications[UHIDPP_NNOTIFICATIONS]; /* [m] pending notifications */ struct usb_task sc_task; /* [m] notification task */ struct ksensordev sc_sensdev; /* [m] */ struct sensor_task *sc_senstsk; /* [m] */ struct uhidpp_report *sc_req; /* [m] synchronous request buffer */ struct uhidpp_report *sc_resp; /* [m] synchronous response buffer */ u_int sc_resp_state; /* [m] synchronous response state */ }; int uhidpp_match(struct device *, void *, void *); void uhidpp_attach(struct device *, struct device *, void *); int uhidpp_detach(struct device *, int flags); void uhidpp_intr(struct uhidev *addr, void *ibuf, u_int len); void uhidpp_refresh(void *); void uhidpp_task(void *); int uhidpp_sleep(struct uhidpp_softc *, uint64_t); void uhidpp_device_connect(struct uhidpp_softc *, struct uhidpp_device *); void uhidpp_device_refresh(struct uhidpp_softc *, struct uhidpp_device *); int uhidpp_device_features(struct uhidpp_softc *, struct uhidpp_device *); struct uhidpp_notification *uhidpp_claim_notification(struct uhidpp_softc *); int uhidpp_consume_notification(struct uhidpp_softc *, struct uhidpp_report *); int uhidpp_is_notification(struct uhidpp_softc *, struct uhidpp_report *); static int uhidpp_has_sensors(struct uhidpp_softc *); int hidpp_get_protocol_version(struct uhidpp_softc *, uint8_t, uint8_t *, uint8_t *); int hidpp10_get_name(struct uhidpp_softc *, uint8_t, char *, size_t); int hidpp10_get_serial(struct uhidpp_softc *, uint8_t, uint8_t *, size_t); int hidpp10_get_type(struct uhidpp_softc *, uint8_t, const char **); int hidpp10_enable_notifications(struct uhidpp_softc *, uint8_t); int hidpp20_root_get_feature(struct uhidpp_softc *, uint8_t, uint16_t, uint8_t *, uint8_t *); int hidpp20_feature_get_count(struct uhidpp_softc *, uint8_t, uint8_t, uint8_t *); int hidpp20_feature_get_id(struct uhidpp_softc *, uint8_t, uint8_t, uint8_t, uint16_t *, uint8_t *); int hidpp20_battery_get_level_status(struct uhidpp_softc *, uint8_t, uint8_t, uint8_t *, uint8_t *); int hidpp20_battery_get_capability(struct uhidpp_softc *, uint8_t, uint8_t, uint8_t *, uint8_t *); int hidpp20_battery_status_is_charging(uint8_t); int hidpp_send_validate(uint8_t, int); int hidpp_send_rap_report(struct uhidpp_softc *, uint8_t, uint8_t, uint8_t, uint8_t, uint8_t *, int, struct uhidpp_report *); int hidpp_send_fap_report(struct uhidpp_softc *, uint8_t, uint8_t, uint8_t, uint8_t, uint8_t *, int, struct uhidpp_report *); int hidpp_send_report(struct uhidpp_softc *, uint8_t, struct uhidpp_report *, struct uhidpp_report *); struct cfdriver uhidpp_cd = { NULL, "uhidpp", DV_DULL }; const struct cfattach uhidpp_ca = { sizeof(struct uhidpp_softc), uhidpp_match, uhidpp_attach, uhidpp_detach, }; static const struct usb_devno uhidpp_devs[] = { { USB_VENDOR_LOGITECH, USB_PRODUCT_ANY }, }; int uhidpp_match(struct device *parent, void *match, void *aux) { struct uhidev_attach_arg *uha = (struct uhidev_attach_arg *)aux; void *desc; int descsiz, siz; if (!UHIDEV_CLAIM_MULTIPLE_REPORTID(uha)) return UMATCH_NONE; if (usb_lookup(uhidpp_devs, uha->uaa->vendor, uha->uaa->product) == NULL) return UMATCH_NONE; uhidev_get_report_desc(uha->parent, &desc, &descsiz); siz = hid_report_size(desc, descsiz, hid_output, HIDPP_REPORT_ID_SHORT); if (siz != HIDPP_REPORT_SHORT_LENGTH) return UMATCH_NONE; siz = hid_report_size(desc, descsiz, hid_output, HIDPP_REPORT_ID_LONG); if (siz != HIDPP_REPORT_LONG_LENGTH) return UMATCH_NONE; uha->claimed[HIDPP_REPORT_ID_SHORT] = 1; uha->claimed[HIDPP_REPORT_ID_LONG] = 1; return UMATCH_VENDOR_PRODUCT; } void uhidpp_attach(struct device *parent, struct device *self, void *aux) { struct uhidpp_softc *sc = (struct uhidpp_softc *)self; struct uhidev_attach_arg *uha = (struct uhidev_attach_arg *)aux; struct usb_attach_arg *uaa = uha->uaa; int npaired = 0; int error, i; sc->sc_hdev.sc_intr = uhidpp_intr; sc->sc_hdev.sc_udev = uaa->device; sc->sc_hdev.sc_parent = uha->parent; sc->sc_hdev.sc_report_id = uha->reportid; /* The largest supported report dictates the sizes. */ sc->sc_hdev.sc_isize = HIDPP_REPORT_LONG_LENGTH; sc->sc_hdev.sc_osize = HIDPP_REPORT_LONG_LENGTH; sc->sc_udev = uaa->device; mtx_init(&sc->sc_mtx, IPL_USB); sc->sc_resp = NULL; sc->sc_resp_state = UHIDPP_RESP_NONE; error = uhidev_open(&sc->sc_hdev); if (error) { printf(" open error %d\n", error); return; } usb_init_task(&sc->sc_task, uhidpp_task, sc, USB_TASK_TYPE_GENERIC); mtx_enter(&sc->sc_mtx); /* * Wire up report device handlers before issuing commands to the device * in order to receive responses. Necessary as uhidev by default * performs the wiring after the attach routine has returned. */ error = uhidev_set_report_dev(sc->sc_hdev.sc_parent, &sc->sc_hdev, HIDPP_REPORT_ID_SHORT); if (error) { mtx_leave(&sc->sc_mtx); printf(" short report error %d\n", error); return; } error = uhidev_set_report_dev(sc->sc_hdev.sc_parent, &sc->sc_hdev, HIDPP_REPORT_ID_LONG); if (error) { mtx_leave(&sc->sc_mtx); printf(" long report error %d\n", error); return; } /* Probe paired devices. */ for (i = 0; i < UHIDPP_NDEVICES; i++) { char name[16]; uint8_t serial[4]; struct uhidpp_device *dev = &sc->sc_devices[i]; const char *type; uint8_t device_id = i + 1; dev->d_id = device_id; if (hidpp10_get_serial(sc, device_id, serial, sizeof(serial)) || hidpp10_get_type(sc, device_id, &type) || hidpp10_get_name(sc, device_id, name, sizeof(name))) continue; if (npaired > 0) printf(","); printf(" device %d", device_id); printf(" %s", type); printf(" \"%s\"", name); printf(" serial %02x-%02x-%02x-%02x", serial[0], serial[1], serial[2], serial[3]); npaired++; } if (npaired == 0) goto out; /* Enable notifications for the receiver. */ error = hidpp10_enable_notifications(sc, HIDPP_DEVICE_ID_RECEIVER); if (error) printf(" error %d", error); out: mtx_leave(&sc->sc_mtx); printf("\n"); } int uhidpp_detach(struct device *self, int flags) { struct uhidpp_softc *sc = (struct uhidpp_softc *)self; int i; usb_rem_wait_task(sc->sc_udev, &sc->sc_task); if (uhidpp_has_sensors(sc)) sensor_task_unregister(sc->sc_senstsk); KASSERT(sc->sc_resp_state == UHIDPP_RESP_NONE); if (uhidpp_has_sensors(sc)) sensordev_deinstall(&sc->sc_sensdev); for (i = 0; i < UHIDPP_NDEVICES; i++) { struct uhidpp_device *dev = &sc->sc_devices[i]; struct ksensor *sens = dev->d_battery.sens; if (!dev->d_connected) continue; sensor_detach(&sc->sc_sensdev, &sens[0]); sensor_detach(&sc->sc_sensdev, &sens[1]); if (dev->d_battery.rechargeable) sensor_detach(&sc->sc_sensdev, &sens[2]); } uhidev_close(&sc->sc_hdev); return 0; } void uhidpp_intr(struct uhidev *addr, void *buf, u_int len) { struct uhidpp_softc *sc = (struct uhidpp_softc *)addr; struct uhidpp_report *rep = buf; int dowake = 0; uint8_t repid; /* * Ugliness ahead as the report ID is stripped of by uhidev_intr() but * needed to determine if an error occurred. * Note that an error response is always a short report even if the * command that caused the error is a long report. */ repid = ((uint8_t *)buf)[-1]; DREPORT(__func__, repid, buf, len); mtx_enter(&sc->sc_mtx); if (uhidpp_is_notification(sc, rep)) { struct uhidpp_notification *ntf; ntf = uhidpp_claim_notification(sc); if (ntf != NULL) { memcpy(&ntf->n_rep, buf, len); usb_add_task(sc->sc_udev, &sc->sc_task); } else { DPRINTF("%s: too many notifications", __func__); } } else { KASSERT(sc->sc_resp_state == UHIDPP_RESP_WAIT); dowake = 1; sc->sc_resp_state = repid; memcpy(sc->sc_resp, buf, len); } mtx_leave(&sc->sc_mtx); if (dowake) wakeup(sc); } void uhidpp_refresh(void *arg) { struct uhidpp_softc *sc = arg; int i; mtx_enter(&sc->sc_mtx); for (i = 0; i < UHIDPP_NDEVICES; i++) { struct uhidpp_device *dev = &sc->sc_devices[i]; if (dev->d_connected) uhidpp_device_refresh(sc, dev); } mtx_leave(&sc->sc_mtx); } void uhidpp_task(void *arg) { struct uhidpp_softc *sc = arg; mtx_enter(&sc->sc_mtx); for (;;) { struct uhidpp_report rep; struct uhidpp_device *dev; if (uhidpp_consume_notification(sc, &rep)) break; DPRINTF("%s: device_id=%d, sub_id=%02x\n", __func__, rep.device_id, rep.rap.sub_id); if (rep.device_id == 0 || rep.device_id > UHIDPP_NDEVICES) { DPRINTF("%s: invalid device\n", __func__); continue; } dev = &sc->sc_devices[rep.device_id - 1]; switch (rep.rap.sub_id) { case 0x0e: /* leds */ case 0x40: /* disconnect */ case 0x4b: /* pairing accepted */ break; case 0x41: /* connect */ /* * Do nothing if the link is reported to be out of * range. This happens when a device has been idle for a * while. */ if (HIDPP_LINK_STATUS(rep.rap.params[0])) uhidpp_device_connect(sc, dev); break; } } mtx_leave(&sc->sc_mtx); } int uhidpp_sleep(struct uhidpp_softc *sc, uint64_t nsecs) { return msleep_nsec(sc, &sc->sc_mtx, PZERO, "uhidpp", nsecs); } void uhidpp_device_connect(struct uhidpp_softc *sc, struct uhidpp_device *dev) { struct ksensor *sens; int error; uint8_t feature_type; MUTEX_ASSERT_LOCKED(&sc->sc_mtx); /* A connected device will continuously send connect events. */ if (dev->d_connected) return; /* * If features are already present, it must be a device lacking battery * support. */ if (dev->d_features) return; error = hidpp_get_protocol_version(sc, dev->d_id, &dev->d_major, &dev->d_minor); if (error) { DPRINTF("%s: protocol version failure: device_id=%d, " "error=%d\n", __func__, dev->d_id, error); return; } DPRINTF("%s: device_id=%d, version=%d.%d\n", __func__, dev->d_id, dev->d_major, dev->d_minor); if (dev->d_major >= 2) { error = uhidpp_device_features(sc, dev); if (error) { DPRINTF("%s: features failure: device_id=%d, " "error=%d\n", __func__, dev->d_id, error); return; } error = hidpp20_root_get_feature(sc, dev->d_id, HIDPP20_FEAT_BATTERY_ID, &dev->d_battery.feature_idx, &feature_type); if (error) { DPRINTF("%s: battery feature index failure: " "device_id=%d, error=%d\n", __func__, dev->d_id, error); return; } error = hidpp20_battery_get_capability(sc, dev->d_id, dev->d_battery.feature_idx, &dev->d_battery.nlevels, &dev->d_battery.rechargeable); if (error) { DPRINTF("%s: battery capability failure: device_id=%d, " "error=%d\n", __func__, dev->d_id, error); return; } } else { return; } dev->d_connected = 1; sens = &dev->d_battery.sens[0]; strlcpy(sens->desc, "battery level", sizeof(sens->desc)); sens->type = SENSOR_PERCENT; sens->flags = SENSOR_FUNKNOWN; sensor_attach(&sc->sc_sensdev, sens); sens = &dev->d_battery.sens[1]; strlcpy(sens->desc, "number of battery levels", sizeof(sens->desc)); sens->type = SENSOR_INTEGER; sens->value = dev->d_battery.nlevels; sensor_attach(&sc->sc_sensdev, sens); if (dev->d_battery.rechargeable) { sens = &dev->d_battery.sens[2]; strlcpy(sens->desc, "charger", sizeof(sens->desc)); sens->type = SENSOR_INDICATOR; sens->value = 0; sensor_attach(&sc->sc_sensdev, sens); } uhidpp_device_refresh(sc, dev); /* * There could be many devices connected to the same receiver, therefore * only install the sensors once. */ if (uhidpp_has_sensors(sc)) return; strlcpy(sc->sc_sensdev.xname, sc->sc_hdev.sc_dev.dv_xname, sizeof(sc->sc_sensdev.xname)); sensordev_install(&sc->sc_sensdev); /* * The mutex must be temporarily released while calling * sensor_task_register() as it might end up sleeping. */ KASSERT(sc->sc_senstsk == NULL); mtx_leave(&sc->sc_mtx); sc->sc_senstsk = sensor_task_register(sc, uhidpp_refresh, 30); mtx_enter(&sc->sc_mtx); } void uhidpp_device_refresh(struct uhidpp_softc *sc, struct uhidpp_device *dev) { MUTEX_ASSERT_LOCKED(&sc->sc_mtx); if (dev->d_major >= 2) { int charging, error; error = hidpp20_battery_get_level_status(sc, dev->d_id, dev->d_battery.feature_idx, &dev->d_battery.level, &dev->d_battery.status); if (error) { DPRINTF("%s: battery status failure: device_id=%d, " "error=%d\n", __func__, dev->d_id, error); return; } charging = hidpp20_battery_status_is_charging( dev->d_battery.status); dev->d_battery.sens[0].value = dev->d_battery.level * 1000; dev->d_battery.sens[0].flags &= ~SENSOR_FUNKNOWN; if (dev->d_battery.nlevels < 10) { /* * According to the HID++ 2.0 specification, less than * 10 levels should be mapped to the following 4 levels: * * [0, 10] critical * [11, 30] low * [31, 80] good * [81, 100] full * * Since sensors are limited to 3 valid statuses, clamp * it even further. Unless the battery is charging in * which the level cannot be trusted. */ if (charging) dev->d_battery.sens[0].status = SENSOR_S_UNKNOWN; else if (dev->d_battery.level <= 10) dev->d_battery.sens[0].status = SENSOR_S_CRIT; else if (dev->d_battery.level <= 30) dev->d_battery.sens[0].status = SENSOR_S_WARN; else dev->d_battery.sens[0].status = SENSOR_S_OK; } else { /* * XXX the device supports battery mileage. The current * level must be checked against resp.fap.params[3] * given by hidpp20_battery_get_capability(). */ dev->d_battery.sens[0].status = SENSOR_S_UNKNOWN; } if (dev->d_battery.rechargeable) dev->d_battery.sens[2].value = charging; } } /* * Enumerate all supported HID++ 2.0 features for the given device. */ int uhidpp_device_features(struct uhidpp_softc *sc, struct uhidpp_device *dev) { int error; uint8_t count, feature_idx, feature_type, i; /* All devices support the root feature. */ dev->d_features |= UHIDPP_DEVICE_FEATURE_ROOT; error = hidpp20_root_get_feature(sc, dev->d_id, HIDPP20_FEAT_FEATURE_ID, &feature_idx, &feature_type); if (error) { DPRINTF("%s: feature index failure: device_id=%d, error=%d\n", __func__, dev->d_id, error); return error; } error = hidpp20_feature_get_count(sc, dev->d_id, feature_idx, &count); if (error) { DPRINTF("%s: feature count failure: device_id=%d, error=%d\n", __func__, dev->d_id, error); return error; } for (i = 1; i <= count; i++) { uint16_t id; uint8_t type; error = hidpp20_feature_get_id(sc, dev->d_id, feature_idx, i, &id, &type); if (error) continue; if (id == HIDPP20_FEAT_BATTERY_ID) dev->d_features |= UHIDPP_DEVICE_FEATURE_BATTERY; DPRINTF("%s: idx=%d, id=%x, type=%x device_id=%d\n", __func__, i, id, type, dev->d_id); } DPRINTF("%s: device_id=%d, count=%d, features=%x\n", __func__, dev->d_id, count, dev->d_features); if ((dev->d_features & UHIDPP_DEVICE_FEATURE_BATTERY) == 0) return -ENODEV; return 0; } /* * Returns the next available notification slot, if available. */ struct uhidpp_notification * uhidpp_claim_notification(struct uhidpp_softc *sc) { struct uhidpp_notification *ntf = NULL; int nclaimed = 0; int i; MUTEX_ASSERT_LOCKED(&sc->sc_mtx); for (i = 0; i < UHIDPP_NNOTIFICATIONS; i++) { struct uhidpp_notification *tmp = &sc->sc_notifications[i]; if (tmp->n_id > 0) nclaimed++; else if (ntf == NULL) ntf = tmp; } if (ntf == NULL) return NULL; ntf->n_id = nclaimed + 1; return ntf; } /* * Consume the first unhandled notification, if present. */ int uhidpp_consume_notification(struct uhidpp_softc *sc, struct uhidpp_report *rep) { struct uhidpp_notification *ntf = NULL; int i; MUTEX_ASSERT_LOCKED(&sc->sc_mtx); for (i = 0; i < UHIDPP_NNOTIFICATIONS; i++) { struct uhidpp_notification *tmp = &sc->sc_notifications[i]; if (tmp->n_id > 0 && (ntf == NULL || tmp->n_id < ntf->n_id)) ntf = tmp; } if (ntf == NULL) return 1; memcpy(rep, &ntf->n_rep, sizeof(*rep)); ntf->n_id = 0; return 0; } /* * Returns non-zero if the given report is a notification. Otherwise, it must be * a response. */ int uhidpp_is_notification(struct uhidpp_softc *sc, struct uhidpp_report *rep) { /* Not waiting for a response. */ if (sc->sc_req == NULL) return 1; /* Everything except the parameters must be repeated in a response. */ if (sc->sc_req->device_id == rep->device_id && sc->sc_req->rap.sub_id == rep->rap.sub_id && sc->sc_req->rap.reg_address == rep->rap.reg_address) return 0; /* An error must always be a response. */ if ((rep->rap.sub_id == HIDPP_ERROR || rep->fap.feature_idx == HIDPP20_ERROR) && rep->fap.funcidx_swid == sc->sc_req->fap.feature_idx && rep->fap.params[0] == sc->sc_req->fap.funcidx_swid) return 0; return 1; } static int uhidpp_has_sensors(struct uhidpp_softc *sc) { return sc->sc_sensdev.xname[0] != '\0'; } int hidpp_get_protocol_version(struct uhidpp_softc *sc, uint8_t device_id, uint8_t *major, uint8_t *minor) { struct uhidpp_report resp; uint8_t params[3] = { 0, 0, HIDPP_FEAT_ROOT_PING_DATA }; int error; error = hidpp_send_fap_report(sc, HIDPP_REPORT_ID_SHORT, device_id, HIDPP_FEAT_ROOT_IDX, HIDPP_FEAT_ROOT_PING_FUNC, params, sizeof(params), &resp); if (error == HIDPP_ERROR_INVALID_SUBID) { *major = 1; *minor = 0; return 0; } if (error) return error; if (resp.rap.params[2] != HIDPP_FEAT_ROOT_PING_DATA) return -EPROTO; *major = resp.fap.params[0]; *minor = resp.fap.params[1]; return 0; } int hidpp10_get_name(struct uhidpp_softc *sc, uint8_t device_id, char *buf, size_t bufsiz) { struct uhidpp_report resp; int error; uint8_t params[1] = { 0x40 + (device_id - 1) }; uint8_t len; error = hidpp_send_rap_report(sc, HIDPP_REPORT_ID_SHORT, HIDPP_DEVICE_ID_RECEIVER, HIDPP_GET_LONG_REGISTER, HIDPP_REG_PAIRING_INFORMATION, params, sizeof(params), &resp); if (error) return error; len = resp.rap.params[1]; if (len + 2 > sizeof(resp.rap.params)) return -ENAMETOOLONG; if (len > bufsiz - 1) len = bufsiz - 1; memcpy(buf, &resp.rap.params[2], len); buf[len] = '\0'; return 0; } int hidpp10_get_serial(struct uhidpp_softc *sc, uint8_t device_id, uint8_t *buf, size_t bufsiz) { struct uhidpp_report resp; int error; uint8_t params[1] = { 0x30 + (device_id - 1) }; uint8_t len; error = hidpp_send_rap_report(sc, HIDPP_REPORT_ID_SHORT, HIDPP_DEVICE_ID_RECEIVER, HIDPP_GET_LONG_REGISTER, HIDPP_REG_PAIRING_INFORMATION, params, sizeof(params), &resp); if (error) return error; len = 4; if (bufsiz < len) len = bufsiz; memcpy(buf, &resp.rap.params[1], len); return 0; } int hidpp10_get_type(struct uhidpp_softc *sc, uint8_t device_id, const char **type) { struct uhidpp_report resp; int error; uint8_t params[1] = { 0x20 + (device_id - 1) }; error = hidpp_send_rap_report(sc, HIDPP_REPORT_ID_SHORT, HIDPP_DEVICE_ID_RECEIVER, HIDPP_GET_LONG_REGISTER, HIDPP_REG_PAIRING_INFORMATION, params, sizeof(params), &resp); if (error) return error; switch (resp.rap.params[7]) { case 0x00: *type = "unknown"; return 0; case 0x01: *type = "keyboard"; return 0; case 0x02: *type = "mouse"; return 0; case 0x03: *type = "numpad"; return 0; case 0x04: *type = "presenter"; return 0; case 0x08: *type = "trackball"; return 0; case 0x09: *type = "touchpad"; return 0; } return -ENOENT; } int hidpp10_enable_notifications(struct uhidpp_softc *sc, uint8_t device_id) { struct uhidpp_report resp; uint8_t params[3]; /* Device reporting flags. */ params[0] = HIDPP_NOTIF_DEVICE_BATTERY_STATUS; /* Receiver reporting flags. */ params[1] = HIDPP_NOTIF_RECEIVER_WIRELESS | HIDPP_NOTIF_RECEIVER_SOFTWARE_PRESENT; /* Device reporting flags (continued). */ params[2] = 0; return hidpp_send_rap_report(sc, HIDPP_REPORT_ID_SHORT, device_id, HIDPP_SET_REGISTER, HIDPP_REG_ENABLE_REPORTS, params, sizeof(params), &resp); } int hidpp20_root_get_feature(struct uhidpp_softc *sc, uint8_t device_id, uint16_t feature, uint8_t *feature_idx, uint8_t *feature_type) { struct uhidpp_report resp; uint8_t params[2] = { feature >> 8, feature & 0xff }; int error; error = hidpp_send_fap_report(sc, HIDPP_REPORT_ID_LONG, device_id, HIDPP20_FEAT_ROOT_ID, HIDPP20_FEAT_ROOT_GET_FEATURE_FUNC, params, sizeof(params), &resp); if (error) return error; if (resp.fap.params[0] == 0) return -ENOENT; *feature_idx = resp.fap.params[0]; *feature_type = resp.fap.params[1]; return 0; } int hidpp20_feature_get_count(struct uhidpp_softc *sc, uint8_t device_id, uint8_t feature_idx, uint8_t *count) { struct uhidpp_report resp; int error; error = hidpp_send_fap_report(sc, HIDPP_REPORT_ID_LONG, device_id, feature_idx, HIDPP20_FEAT_FEATURE_COUNT_FUNC, NULL, 0, &resp); if (error) return error; *count = resp.fap.params[0]; return 0; } int hidpp20_feature_get_id(struct uhidpp_softc *sc, uint8_t device_id, uint8_t feature_idx, uint8_t idx, uint16_t *id, uint8_t *type) { struct uhidpp_report resp; uint8_t params[1] = { idx }; int error; error = hidpp_send_fap_report(sc, HIDPP_REPORT_ID_LONG, device_id, feature_idx, HIDPP20_FEAT_FEATURE_ID_FUNC, params, sizeof(params), &resp); if (error) return error; *id = bemtoh16(resp.fap.params); *type = resp.fap.params[2]; return 0; } int hidpp20_battery_get_level_status(struct uhidpp_softc *sc, uint8_t device_id, uint8_t feature_idx, uint8_t *level, uint8_t *status) { struct uhidpp_report resp; int error; error = hidpp_send_fap_report(sc, HIDPP_REPORT_ID_LONG, device_id, feature_idx, HIDPP20_FEAT_BATTERY_LEVEL_FUNC, NULL, 0, &resp); if (error) return error; *level = resp.fap.params[0]; /* next_level = resp.fap.params[1]; */ *status = resp.fap.params[2]; /* * While charging, the reported level cannot be trusted. However, fake * the battery state once the charging is done. */ switch (hidpp20_battery_status_is_charging(*status)) { case HIDPP20_BATTERY_STATUS_CHARGING_DONE: *level = 100; *status = 0; break; } return 0; } int hidpp20_battery_get_capability(struct uhidpp_softc *sc, uint8_t device_id, uint8_t feature_idx, uint8_t *nlevels, uint8_t *rechargeable) { struct uhidpp_report resp; int error; error = hidpp_send_fap_report(sc, HIDPP_REPORT_ID_LONG, device_id, feature_idx, HIDPP20_FEAT_BATTERY_CAPABILITY_FUNC, NULL, 0, &resp); if (error) return error; *nlevels = resp.fap.params[0]; *rechargeable = resp.fap.params[1] & HIDPP20_BATTERY_CAPABILITY_RECHARGEABLE; return 0; } int hidpp20_battery_status_is_charging(uint8_t status) { switch (status) { case 1: /* recharging */ case 2: /* charge in final stage */ case 4: /* recharging below optimal speed */ return status; case 3: /* charge complete */ return status; case 0: /* discharging */ case 5: /* invalid battery type */ case 6: /* thermal error */ case 7: /* other charging error */ default: return 0; } } int hidpp_send_validate(uint8_t report_id, int nparams) { if (report_id == HIDPP_REPORT_ID_SHORT) { if (nparams > HIDPP_REPORT_SHORT_PARAMS_MAX) return -EMSGSIZE; } else if (report_id == HIDPP_REPORT_ID_LONG) { if (nparams > HIDPP_REPORT_LONG_PARAMS_MAX) return -EMSGSIZE; } else { return -EINVAL; } return 0; } int hidpp_send_fap_report(struct uhidpp_softc *sc, uint8_t report_id, uint8_t device_id, uint8_t feature_idx, uint8_t funcidx_swid, uint8_t *params, int nparams, struct uhidpp_report *resp) { struct uhidpp_report req; int error; error = hidpp_send_validate(report_id, nparams); if (error) return error; memset(&req, 0, sizeof(req)); req.device_id = device_id; req.fap.feature_idx = feature_idx; req.fap.funcidx_swid = (funcidx_swid << HIDPP_SOFTWARE_ID_LEN) | HIDPP_SOFTWARE_ID; memcpy(req.fap.params, params, nparams); return hidpp_send_report(sc, report_id, &req, resp); } int hidpp_send_rap_report(struct uhidpp_softc *sc, uint8_t report_id, uint8_t device_id, uint8_t sub_id, uint8_t reg_address, uint8_t *params, int nparams, struct uhidpp_report *resp) { struct uhidpp_report req; int error; error = hidpp_send_validate(report_id, nparams); if (error) return error; memset(&req, 0, sizeof(req)); req.device_id = device_id; req.rap.sub_id = sub_id; req.rap.reg_address = reg_address; memcpy(req.rap.params, params, nparams); return hidpp_send_report(sc, report_id, &req, resp); } int hidpp_send_report(struct uhidpp_softc *sc, uint8_t report_id, struct uhidpp_report *req, struct uhidpp_report *resp) { int error = 0; int len, n; MUTEX_ASSERT_LOCKED(&sc->sc_mtx); if (report_id == HIDPP_REPORT_ID_SHORT) len = HIDPP_REPORT_SHORT_LENGTH; else if (report_id == HIDPP_REPORT_ID_LONG) len = HIDPP_REPORT_LONG_LENGTH; else return -EINVAL; DREPORT(__func__, report_id, (const unsigned char *)req, len); /* Wait until any ongoing command has completed. */ while (sc->sc_resp_state != UHIDPP_RESP_NONE) uhidpp_sleep(sc, INFSLP); sc->sc_req = req; sc->sc_resp = resp; sc->sc_resp_state = UHIDPP_RESP_WAIT; /* * The mutex must be temporarily released while calling * uhidev_set_report() as it might end up sleeping. */ mtx_leave(&sc->sc_mtx); n = uhidev_set_report(sc->sc_hdev.sc_parent, UHID_OUTPUT_REPORT, report_id, req, len); mtx_enter(&sc->sc_mtx); if (len != n) { error = -EBUSY; goto out; } /* * The interrupt could already have been received while the mutex was * released. Otherwise, wait for it. */ if (sc->sc_resp_state == UHIDPP_RESP_WAIT) { /* Timeout taken from the hid-logitech-hidpp Linux driver. */ error = uhidpp_sleep(sc, SEC_TO_NSEC(5)); if (error) { error = -error; goto out; } } if (sc->sc_resp_state == UHIDPP_RESP_ERROR) error = -EIO; else if (sc->sc_resp_state == HIDPP_REPORT_ID_SHORT && resp->rap.sub_id == HIDPP_ERROR) error = resp->rap.params[1]; else if (sc->sc_resp_state == HIDPP_REPORT_ID_LONG && resp->fap.feature_idx == HIDPP20_ERROR) error = resp->fap.params[1]; out: sc->sc_req = NULL; sc->sc_resp = NULL; sc->sc_resp_state = UHIDPP_RESP_NONE; wakeup(sc); return error; } #ifdef UHIDPP_DEBUG void uhidd_dump_report(const char *prefix, uint8_t repid, const unsigned char *buf, u_int buflen) { u_int i; printf("%s: %02x ", prefix, repid); for (i = 0; i < buflen; i++) { printf("%02x%s", buf[i], i == 2 ? " [" : (i + 1 < buflen ? " " : "")); } printf("]\n"); } #endif