/* $OpenBSD: utrh.c,v 1.3 2010/02/18 23:34:05 deraadt Exp $ */ /* * Copyright (c) 2009 Yojiro UO * * 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 DISCAIMS 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. */ /* Driver for Strawberry linux USBRH Temerature/Humidity sensor */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef USB_DEBUG #define UTRH_DEBUG #endif #ifdef UTRH_DEBUG int utrhdebug = 0; #define DPRINTFN(n, x) do { if (utrhdebug > (n)) printf x; } while (0) #else #define DPRINTFN(n, x) #endif #define DPRINTF(x) DPRINTFN(0, x) /* sensors */ #define UTRH_TEMP 0 #define UTRH_HUMIDITY 1 #define UTRH_MAX_SENSORS 2 struct utrh_softc { struct uhidev sc_hdev; usbd_device_handle sc_udev; u_char sc_dying; uint16_t sc_flag; /* uhidev parameters */ size_t sc_flen; /* feature report length */ size_t sc_ilen; /* input report length */ size_t sc_olen; /* output report length */ uint8_t *sc_ibuf; /* sensor framework */ struct ksensor sc_sensor[UTRH_MAX_SENSORS]; struct ksensordev sc_sensordev; struct sensor_task *sc_sensortask; uint8_t sc_num_sensors; }; const struct usb_devno utrh_devs[] = { { USB_VENDOR_STRAWBERRYLINUX, USB_PRODUCT_STRAWBERRYLINUX_USBRH}, }; #define utrh_lookup(v, p) usb_lookup(utrh_devs, v, p) int utrh_match(struct device *, void *, void *); void utrh_attach(struct device *, struct device *, void *); int utrh_detach(struct device *, int); int utrh_activate(struct device *, int); int utrh_sht1x_temp(unsigned int); int utrh_sht1x_rh(unsigned int, int); void utrh_intr(struct uhidev *, void *, u_int); void utrh_refresh(void *); struct cfdriver utrh_cd = { NULL, "utrh", DV_DULL }; const struct cfattach utrh_ca = { sizeof(struct utrh_softc), utrh_match, utrh_attach, utrh_detach, utrh_activate, }; int utrh_match(struct device *parent, void *match, void *aux) { struct usb_attach_arg *uaa = aux; struct uhidev_attach_arg *uha = (struct uhidev_attach_arg *)uaa; if (utrh_lookup(uha->uaa->vendor, uha->uaa->product) == NULL) return UMATCH_NONE; return (UMATCH_VENDOR_PRODUCT); } void utrh_attach(struct device *parent, struct device *self, void *aux) { struct utrh_softc *sc = (struct utrh_softc *)self; struct usb_attach_arg *uaa = aux; struct uhidev_attach_arg *uha = (struct uhidev_attach_arg *)uaa; usbd_device_handle dev = uha->parent->sc_udev; int size, repid, err; void *desc; sc->sc_udev = dev; sc->sc_hdev.sc_intr = utrh_intr; sc->sc_hdev.sc_parent = uha->parent; sc->sc_hdev.sc_report_id = uha->reportid; sc->sc_num_sensors = 0; uhidev_get_report_desc(uha->parent, &desc, &size); repid = uha->reportid; sc->sc_ilen = hid_report_size(desc, size, hid_input, repid); sc->sc_olen = hid_report_size(desc, size, hid_output, repid); sc->sc_flen = hid_report_size(desc, size, hid_feature, repid); err = uhidev_open(&sc->sc_hdev); if (err) { printf("utrh_open: uhidev_open %d\n", err); return; } sc->sc_ibuf = malloc(sc->sc_ilen, M_USBDEV, M_WAITOK); usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->sc_udev, &sc->sc_hdev.sc_dev); printf("\n"); /* attach sensor */ strlcpy(sc->sc_sensordev.xname, sc->sc_hdev.sc_dev.dv_xname, sizeof(sc->sc_sensordev.xname)); sc->sc_sensor[UTRH_TEMP].type = SENSOR_TEMP; sc->sc_sensor[UTRH_TEMP].flags = SENSOR_FINVALID; strlcpy(sc->sc_sensor[UTRH_HUMIDITY].desc, "humidity", sizeof(sc->sc_sensor[UTRH_HUMIDITY].desc)); sc->sc_sensor[UTRH_HUMIDITY].type = SENSOR_PERCENT; sc->sc_sensor[UTRH_HUMIDITY].flags = SENSOR_FINVALID; sensor_attach(&sc->sc_sensordev, &sc->sc_sensor[UTRH_TEMP]); sensor_attach(&sc->sc_sensordev, &sc->sc_sensor[UTRH_HUMIDITY]); sc->sc_num_sensors = 2; if (sc->sc_num_sensors > 0) { sc->sc_sensortask = sensor_task_register(sc, utrh_refresh, 6); if (sc->sc_sensortask == NULL) { printf(", unable to register update task\n"); return; } sensordev_install(&sc->sc_sensordev); } DPRINTF(("utrh_attach: complete\n")); } int utrh_detach(struct device *self, int flags) { struct utrh_softc *sc = (struct utrh_softc *)self; int i, rv = 0; sc->sc_dying = 1; if (sc->sc_num_sensors > 0) { wakeup(&sc->sc_sensortask); sensordev_deinstall(&sc->sc_sensordev); for (i = 0; i < sc->sc_num_sensors; i++) sensor_detach(&sc->sc_sensordev, &sc->sc_sensor[i]); if (sc->sc_sensortask != NULL) sensor_task_unregister(sc->sc_sensortask); } if (sc->sc_ibuf != NULL) { free(sc->sc_ibuf, M_USBDEV); sc->sc_ibuf = NULL; } usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_udev, &sc->sc_hdev.sc_dev); return (rv); } int utrh_activate(struct device *self, int act) { struct utrh_softc *sc = (struct utrh_softc *)self; switch (act) { case DVACT_ACTIVATE: break; case DVACT_DEACTIVATE: sc->sc_dying = 1; break; } return (0); } void utrh_intr(struct uhidev *addr, void *ibuf, u_int len) { struct utrh_softc *sc = (struct utrh_softc *)addr; if (sc->sc_ibuf == NULL) return; /* receive sensor data */ memcpy(sc->sc_ibuf, ibuf, len); return; } void utrh_refresh(void *arg) { struct utrh_softc *sc = arg; unsigned int temp_tick, humidity_tick; int temp, rh; /* issue query */ uint8_t cmdbuf[] = {0x31, 0x15, 0x00, 0x00, 0x00, 0x00, 0x00}; if (uhidev_set_report(&sc->sc_hdev, UHID_OUTPUT_REPORT, cmdbuf, sc->sc_olen)) return; /* wait till sensor data are updated, 1s will be enough */ tsleep(&sc->sc_sensortask, 0, "utrh", (1*hz)); temp_tick = (sc->sc_ibuf[2] * 256 + sc->sc_ibuf[3]) & 0x3fff; humidity_tick = (sc->sc_ibuf[0] * 256 + sc->sc_ibuf[1]) & 0x0fff; temp = utrh_sht1x_temp(temp_tick); rh = utrh_sht1x_rh(humidity_tick, temp); sc->sc_sensor[UTRH_TEMP].value = (temp * 10000) + 273150000; sc->sc_sensor[UTRH_TEMP].flags &= ~SENSOR_FINVALID; sc->sc_sensor[UTRH_HUMIDITY].value = rh; sc->sc_sensor[UTRH_HUMIDITY].flags &= ~SENSOR_FINVALID; } /* return C-degree * 100 value */ int utrh_sht1x_temp(unsigned int ticks) { return (ticks - 4010); } /* return %RH * 1000 */ int utrh_sht1x_rh(unsigned int ticks, int temp) { int rh_l, rh; rh_l = (-40000 + 405 * ticks) - ((7 * ticks * ticks) / 250); rh = ((temp - 2500) * (1 + (ticks >> 7)) + rh_l) / 10; return rh; }