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uthum.c revision 1.16
      1  1.16       mrg /*	$NetBSD: uthum.c,v 1.16 2019/05/05 03:17:54 mrg Exp $   */
      2   1.1     tonio /*	$OpenBSD: uthum.c,v 1.6 2010/01/03 18:43:02 deraadt Exp $   */
      3   1.1     tonio 
      4   1.1     tonio /*
      5   1.1     tonio  * Copyright (c) 2009 Yojiro UO <yuo (at) nui.org>
      6   1.1     tonio  *
      7   1.1     tonio  * Permission to use, copy, modify, and distribute this software for any
      8   1.1     tonio  * purpose with or without fee is hereby granted, provided that the above
      9   1.1     tonio  * copyright notice and this permission notice appear in all copies.
     10   1.1     tonio  *
     11   1.1     tonio  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCAIMS ALL WARRANTIES
     12   1.1     tonio  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
     13   1.1     tonio  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
     14   1.1     tonio  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
     15   1.1     tonio  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
     16   1.1     tonio  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
     17   1.1     tonio  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
     18   1.1     tonio  */
     19   1.1     tonio 
     20   1.9  christos /*
     21   1.9  christos  * Driver for TEMPer and TEMPerHUM HID
     22   1.9  christos  */
     23   1.9  christos 
     24   1.9  christos #include <sys/cdefs.h>
     25  1.16       mrg __KERNEL_RCSID(0, "$NetBSD: uthum.c,v 1.16 2019/05/05 03:17:54 mrg Exp $");
     26  1.13     skrll 
     27  1.13     skrll #ifdef _KERNEL_OPT
     28  1.13     skrll #include "opt_usb.h"
     29  1.13     skrll #endif
     30   1.1     tonio 
     31   1.1     tonio #include <sys/param.h>
     32   1.1     tonio #include <sys/proc.h>
     33   1.1     tonio #include <sys/systm.h>
     34   1.1     tonio #include <sys/kernel.h>
     35   1.1     tonio #include <sys/device.h>
     36   1.1     tonio #include <sys/conf.h>
     37   1.1     tonio 
     38   1.1     tonio #include <dev/sysmon/sysmonvar.h>
     39   1.1     tonio 
     40   1.1     tonio #include <dev/usb/usb.h>
     41   1.1     tonio #include <dev/usb/usbhid.h>
     42   1.1     tonio #include <dev/usb/usbdi.h>
     43   1.1     tonio #include <dev/usb/usbdi_util.h>
     44   1.1     tonio #include <dev/usb/usbdevs.h>
     45   1.1     tonio #include <dev/usb/uhidev.h>
     46  1.14    bouyer #include <dev/hid/hid.h>
     47   1.1     tonio 
     48   1.1     tonio #ifdef UTHUM_DEBUG
     49   1.1     tonio int	uthumdebug = 0;
     50   1.1     tonio #define DPRINTFN(n, x)	do { if (uthumdebug > (n)) printf x; } while (0)
     51   1.1     tonio #else
     52   1.1     tonio #define DPRINTFN(n, x)
     53   1.1     tonio #endif
     54   1.1     tonio 
     55   1.1     tonio #define DPRINTF(x) DPRINTFN(0, x)
     56   1.1     tonio 
     57   1.1     tonio 
     58   1.1     tonio /* TEMPerHUM */
     59   1.1     tonio #define CMD_DEVTYPE 0x52 /* XXX */
     60   1.1     tonio #define CMD_GETDATA 0x48 /* XXX */
     61   1.1     tonio #define CMD_GETTEMP 0x54 /* XXX */
     62   1.1     tonio static uint8_t cmd_start[8] =
     63   1.1     tonio 	{ 0x0a, 0x0b, 0x0c, 0x0d, 0x00, 0x00, 0x02, 0x00 };
     64   1.1     tonio static uint8_t cmd_end[8] =
     65   1.1     tonio 	{ 0x0a, 0x0b, 0x0c, 0x0d, 0x00, 0x00, 0x01, 0x00 };
     66   1.1     tonio 
     67   1.1     tonio /* sensors */
     68   1.1     tonio #define UTHUM_TEMP		0
     69   1.1     tonio #define UTHUM_HUMIDITY		1
     70   1.1     tonio #define UTHUM_MAX_SENSORS	2
     71   1.1     tonio 
     72   1.1     tonio #define UTHUM_TYPE_UNKNOWN	0
     73   1.1     tonio #define UTHUM_TYPE_SHT1x	1
     74   1.1     tonio #define UTHUM_TYPE_TEMPER	2
     75   1.1     tonio 
     76   1.1     tonio struct uthum_softc {
     77   1.1     tonio 	struct uhidev		 sc_hdev;
     78  1.11     skrll 	struct usbd_device *	 sc_udev;
     79   1.1     tonio 	u_char			 sc_dying;
     80   1.1     tonio 	uint16_t		 sc_flag;
     81   1.1     tonio 	int			 sc_sensortype;
     82   1.1     tonio 
     83   1.1     tonio 	/* uhidev parameters */
     84   1.1     tonio 	size_t			 sc_flen;	/* feature report length */
     85   1.1     tonio 	size_t			 sc_ilen;	/* input report length */
     86   1.1     tonio 	size_t			 sc_olen;	/* output report length */
     87   1.1     tonio 
     88   1.1     tonio 	/* sensor framework */
     89   1.1     tonio 	struct sysmon_envsys		 *sc_sme;
     90   1.1     tonio 	envsys_data_t			 sc_sensor[UTHUM_MAX_SENSORS];
     91   1.1     tonio 
     92   1.1     tonio 	uint8_t			 sc_num_sensors;
     93   1.1     tonio };
     94   1.1     tonio 
     95   1.1     tonio 
     96   1.1     tonio const struct usb_devno uthum_devs[] = {
     97   1.1     tonio 	/* XXX: various TEMPer variants using same VID/PID */
     98   1.1     tonio 	{ USB_VENDOR_TENX, USB_PRODUCT_TENX_TEMPER},
     99   1.1     tonio };
    100   1.1     tonio #define uthum_lookup(v, p) usb_lookup(uthum_devs, v, p)
    101   1.1     tonio 
    102   1.1     tonio int uthum_match(device_t, cfdata_t, void *);
    103   1.1     tonio void uthum_attach(device_t, device_t, void *);
    104   1.1     tonio void uthum_childdet(device_t, device_t);
    105   1.1     tonio int uthum_detach(device_t, int);
    106   1.1     tonio int uthum_activate(device_t, enum devact);
    107   1.1     tonio 
    108   1.1     tonio int uthum_read_data(struct uthum_softc *, uint8_t, uint8_t *, size_t, int);
    109   1.1     tonio int uthum_check_sensortype(struct uthum_softc *);
    110   1.5       jdc int uthum_temper_temp(uint8_t, uint8_t);
    111   1.5       jdc int uthum_sht1x_temp(uint8_t, uint8_t);
    112   1.1     tonio int uthum_sht1x_rh(unsigned int, int);
    113   1.1     tonio 
    114   1.1     tonio void uthum_intr(struct uhidev *, void *, u_int);
    115   1.1     tonio static void uthum_refresh(struct sysmon_envsys *, envsys_data_t *);
    116   1.1     tonio 
    117  1.16       mrg 
    118   1.1     tonio CFATTACH_DECL_NEW(uthum, sizeof(struct uthum_softc), uthum_match, uthum_attach,
    119   1.1     tonio     uthum_detach, uthum_activate);
    120   1.1     tonio 
    121   1.9  christos int
    122   1.6    dyoung uthum_match(device_t parent, cfdata_t match, void *aux)
    123   1.1     tonio {
    124  1.11     skrll 	struct uhidev_attach_arg *uha = aux;
    125   1.1     tonio 
    126  1.12   msaitoh 	return uthum_lookup(uha->uiaa->uiaa_vendor, uha->uiaa->uiaa_product)
    127  1.12   msaitoh 	    != NULL ? UMATCH_VENDOR_PRODUCT : UMATCH_NONE;
    128   1.1     tonio }
    129   1.1     tonio 
    130   1.9  christos void
    131   1.6    dyoung uthum_attach(device_t parent, device_t self, void *aux)
    132   1.1     tonio {
    133   1.6    dyoung 	struct uthum_softc *sc = device_private(self);
    134  1.11     skrll 	struct uhidev_attach_arg *uha = aux;
    135  1.11     skrll 	struct usbd_device *dev = uha->parent->sc_udev;
    136   1.1     tonio 	int size, repid;
    137   1.1     tonio 	void *desc;
    138   1.1     tonio 
    139   1.1     tonio 	sc->sc_udev = dev;
    140   1.1     tonio 	sc->sc_hdev.sc_dev = self;
    141   1.1     tonio 	sc->sc_hdev.sc_intr = uthum_intr;
    142   1.1     tonio 	sc->sc_hdev.sc_parent = uha->parent;
    143   1.1     tonio 	sc->sc_hdev.sc_report_id = uha->reportid;
    144   1.1     tonio 	sc->sc_num_sensors = 0;
    145   1.1     tonio 
    146   1.2    plunky 	aprint_normal("\n");
    147   1.2    plunky 	aprint_naive("\n");
    148   1.2    plunky 
    149   1.1     tonio 	uhidev_get_report_desc(uha->parent, &desc, &size);
    150   1.1     tonio 	repid = uha->reportid;
    151   1.1     tonio 	sc->sc_ilen = hid_report_size(desc, size, hid_input, repid);
    152   1.1     tonio 	sc->sc_olen = hid_report_size(desc, size, hid_output, repid);
    153   1.1     tonio 	sc->sc_flen = hid_report_size(desc, size, hid_feature, repid);
    154   1.1     tonio 
    155   1.1     tonio 	usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->sc_udev,
    156   1.1     tonio 	    sc->sc_hdev.sc_dev);
    157   1.1     tonio 
    158   1.1     tonio 	if (sc->sc_flen < 32) {
    159   1.1     tonio 		/* not sensor interface, just attach */
    160   1.1     tonio 		return;
    161   1.1     tonio 	}
    162   1.1     tonio 
    163   1.1     tonio 	sc->sc_sensortype = uthum_check_sensortype(sc);
    164   1.1     tonio 
    165   1.1     tonio 	/* attach sensor */
    166   1.1     tonio 	sc->sc_sme = sysmon_envsys_create();
    167   1.1     tonio 	sc->sc_sme->sme_name = device_xname(self);
    168   1.1     tonio 
    169   1.1     tonio 	switch (sc->sc_sensortype) {
    170   1.1     tonio 	case UTHUM_TYPE_SHT1x:
    171   1.1     tonio 		(void)strlcpy(sc->sc_sensor[UTHUM_TEMP].desc, "temp",
    172   1.1     tonio 		    sizeof(sc->sc_sensor[UTHUM_TEMP].desc));
    173   1.1     tonio 		sc->sc_sensor[UTHUM_TEMP].units = ENVSYS_STEMP;
    174   1.1     tonio 		sc->sc_sensor[UTHUM_TEMP].state = ENVSYS_SINVALID;
    175   1.1     tonio 
    176   1.3      cnst 		(void)strlcpy(sc->sc_sensor[UTHUM_HUMIDITY].desc,
    177   1.3      cnst 		    "relative humidity",
    178   1.1     tonio 		    sizeof(sc->sc_sensor[UTHUM_HUMIDITY].desc));
    179   1.1     tonio 		sc->sc_sensor[UTHUM_HUMIDITY].units = ENVSYS_INTEGER;
    180   1.1     tonio 		sc->sc_sensor[UTHUM_HUMIDITY].value_cur = 0;
    181   1.1     tonio 		sc->sc_sensor[UTHUM_HUMIDITY].state = ENVSYS_SINVALID;
    182   1.1     tonio 
    183  1.12   msaitoh 		sysmon_envsys_sensor_attach(sc->sc_sme,
    184  1.12   msaitoh 		    &sc->sc_sensor[UTHUM_TEMP]);
    185  1.12   msaitoh 		sysmon_envsys_sensor_attach(sc->sc_sme,
    186  1.12   msaitoh 		    &sc->sc_sensor[UTHUM_HUMIDITY]);
    187   1.1     tonio 		sc->sc_num_sensors = 2;
    188   1.1     tonio 		DPRINTF(("sensor type: SHT1x\n"));
    189   1.1     tonio 		break;
    190   1.1     tonio 	case UTHUM_TYPE_TEMPER:
    191   1.1     tonio 		(void)strlcpy(sc->sc_sensor[UTHUM_TEMP].desc, "temp",
    192   1.1     tonio 		    sizeof(sc->sc_sensor[UTHUM_TEMP].desc));
    193   1.1     tonio 		sc->sc_sensor[UTHUM_TEMP].units = ENVSYS_STEMP;
    194   1.1     tonio 		sc->sc_sensor[UTHUM_TEMP].state = ENVSYS_SINVALID;
    195   1.1     tonio 
    196  1.12   msaitoh 		sysmon_envsys_sensor_attach(sc->sc_sme,
    197  1.12   msaitoh 		    &sc->sc_sensor[UTHUM_TEMP]);
    198   1.1     tonio 		sc->sc_num_sensors = 1;
    199   1.1     tonio 		DPRINTF(("sensor type: TEMPer\n"));
    200   1.1     tonio 		break;
    201   1.1     tonio 	case UTHUM_TYPE_UNKNOWN:
    202   1.1     tonio 		DPRINTF(("sensor type: unknown, give up to attach sensors\n"));
    203   1.1     tonio 	default:
    204   1.1     tonio 		break;
    205   1.1     tonio 	}
    206   1.1     tonio 
    207   1.1     tonio 	if (sc->sc_num_sensors > 0) {
    208   1.1     tonio 		sc->sc_sme->sme_cookie = sc;
    209   1.1     tonio 		sc->sc_sme->sme_refresh = uthum_refresh;
    210   1.1     tonio 
    211   1.1     tonio 		if (sysmon_envsys_register(sc->sc_sme)) {
    212  1.12   msaitoh 			aprint_error_dev(self,
    213  1.12   msaitoh 			    "unable to register with sysmon\n");
    214   1.1     tonio 			sysmon_envsys_destroy(sc->sc_sme);
    215   1.1     tonio 		}
    216   1.1     tonio 	} else {
    217   1.1     tonio 		sysmon_envsys_destroy(sc->sc_sme);
    218   1.1     tonio 	}
    219   1.1     tonio 
    220   1.1     tonio 	DPRINTF(("uthum_attach: complete\n"));
    221   1.1     tonio }
    222   1.1     tonio 
    223   1.9  christos int
    224   1.6    dyoung uthum_detach(device_t self, int flags)
    225   1.1     tonio {
    226   1.6    dyoung 	struct uthum_softc *sc = device_private(self);
    227   1.1     tonio 	int rv = 0;
    228   1.1     tonio 
    229   1.1     tonio 	sc->sc_dying = 1;
    230   1.1     tonio 
    231   1.1     tonio 	if (sc->sc_num_sensors > 0) {
    232   1.1     tonio 		sysmon_envsys_unregister(sc->sc_sme);
    233   1.1     tonio 	}
    234   1.1     tonio 
    235   1.1     tonio 	usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_udev,
    236   1.1     tonio 	    sc->sc_hdev.sc_dev);
    237   1.1     tonio 
    238  1.11     skrll 	return rv;
    239   1.1     tonio }
    240   1.1     tonio 
    241   1.1     tonio int
    242   1.1     tonio uthum_activate(device_t self, enum devact act)
    243   1.1     tonio {
    244   1.1     tonio 	struct uthum_softc *sc = device_private(self);
    245   1.1     tonio 
    246   1.1     tonio 	switch (act) {
    247   1.1     tonio 	case DVACT_DEACTIVATE:
    248   1.1     tonio 		sc->sc_dying = 1;
    249   1.1     tonio 		break;
    250   1.1     tonio 	}
    251  1.11     skrll 	return 0;
    252   1.1     tonio }
    253   1.1     tonio 
    254   1.1     tonio void
    255   1.1     tonio uthum_intr(struct uhidev *addr, void *ibuf, u_int len)
    256   1.1     tonio {
    257   1.1     tonio 	/* do nothing */
    258   1.1     tonio }
    259   1.1     tonio 
    260   1.1     tonio int
    261   1.1     tonio uthum_read_data(struct uthum_softc *sc, uint8_t target_cmd, uint8_t *buf,
    262   1.4       jdc 	size_t len, int need_delay)
    263   1.1     tonio {
    264   1.1     tonio 	int i;
    265   1.1     tonio 	uint8_t cmdbuf[32], report[256];
    266   1.1     tonio 
    267   1.1     tonio 	/* if return buffer is null, do nothing */
    268   1.1     tonio 	if ((buf == NULL) || len == 0)
    269   1.1     tonio 		return 0;
    270   1.1     tonio 
    271   1.1     tonio 	/* issue query */
    272  1.11     skrll 	memset(cmdbuf, 0, sizeof(cmdbuf));
    273   1.1     tonio 	memcpy(cmdbuf, cmd_start, sizeof(cmd_start));
    274   1.1     tonio 	if (uhidev_set_report(&sc->sc_hdev, UHID_OUTPUT_REPORT,
    275   1.1     tonio 	    cmdbuf, sc->sc_olen))
    276   1.1     tonio 		return EIO;
    277   1.1     tonio 
    278  1.11     skrll 	memset(cmdbuf, 0, sizeof(cmdbuf));
    279   1.1     tonio 	cmdbuf[0] = target_cmd;
    280   1.1     tonio 	if (uhidev_set_report(&sc->sc_hdev, UHID_OUTPUT_REPORT,
    281   1.1     tonio 	    cmdbuf, sc->sc_olen))
    282   1.1     tonio 		return EIO;
    283   1.1     tonio 
    284  1.11     skrll 	memset(cmdbuf, 0, sizeof(cmdbuf));
    285   1.1     tonio 	for (i = 0; i < 7; i++) {
    286   1.1     tonio 		if (uhidev_set_report(&sc->sc_hdev, UHID_OUTPUT_REPORT,
    287   1.1     tonio 		    cmdbuf, sc->sc_olen))
    288   1.1     tonio 			return EIO;
    289   1.1     tonio 	}
    290   1.1     tonio 	memcpy(cmdbuf, cmd_end, sizeof(cmd_end));
    291   1.1     tonio 	if (uhidev_set_report(&sc->sc_hdev, UHID_OUTPUT_REPORT,
    292   1.1     tonio 	    cmdbuf, sc->sc_olen))
    293   1.1     tonio 		return EIO;
    294   1.1     tonio 
    295   1.1     tonio 	/* wait if required */
    296   1.4       jdc 	if (need_delay > 1)
    297  1.15     skrll 		kpause("uthum", false, (need_delay*hz+999)/1000 + 1, NULL);
    298   1.1     tonio 
    299   1.1     tonio 	/* get answer */
    300   1.1     tonio 	if (uhidev_get_report(&sc->sc_hdev, UHID_FEATURE_REPORT,
    301   1.1     tonio 	    report, sc->sc_flen))
    302   1.1     tonio 		return EIO;
    303   1.1     tonio 	memcpy(buf, report, len);
    304   1.1     tonio 	return 0;
    305   1.1     tonio }
    306   1.1     tonio 
    307   1.1     tonio int
    308   1.1     tonio uthum_check_sensortype(struct uthum_softc *sc)
    309   1.1     tonio {
    310   1.1     tonio 	uint8_t buf[8];
    311   1.5       jdc 	static uint8_t sht1x_sig0[] =
    312   1.1     tonio 	    { 0x57, 0x5a, 0x13, 0x00, 0x14, 0x00, 0x53, 0x00 };
    313   1.5       jdc 	static uint8_t sht1x_sig1[] =
    314   1.5       jdc 	    { 0x57, 0x5a, 0x14, 0x00, 0x14, 0x00, 0x53, 0x00 };
    315   1.1     tonio 	static uint8_t temper_sig[] =
    316   1.1     tonio 	    { 0x57, 0x58, 0x14, 0x00, 0x14, 0x00, 0x53, 0x00 };
    317   1.1     tonio 
    318   1.1     tonio 	if (uthum_read_data(sc, CMD_DEVTYPE, buf, sizeof(buf), 0) != 0) {
    319   1.1     tonio 		DPRINTF(("uthum: read fail\n"));
    320   1.1     tonio 		return UTHUM_TYPE_UNKNOWN;
    321   1.1     tonio 	}
    322   1.1     tonio 
    323   1.1     tonio 	/*
    324   1.1     tonio 	 * currently we have not enough information about the return value,
    325   1.1     tonio 	 * therefore, compare full bytes.
    326   1.1     tonio 	 * TEMPerHUM HID (SHT1x version) will return:
    327   1.1     tonio 	 *   { 0x57, 0x5a, 0x13, 0x00, 0x14, 0x00, 0x53, 0x00 }
    328   1.5       jdc 	 *   { 0x57, 0x5a, 0x14, 0x00, 0x14, 0x00, 0x53, 0x00 }
    329   1.5       jdc 	 * TEMPer HID (TEMPer version) will return:
    330   1.1     tonio 	 *   { 0x57, 0x58, 0x14, 0x00, 0x14, 0x00, 0x53, 0x00 }
    331   1.1     tonio 	 */
    332   1.5       jdc 	DPRINTF(("uthum: device signature: "
    333   1.5       jdc 	    "0x%0x 0x%0x 0x%0x 0x%0x 0x%0x 0x%0x 0x%0x 0x%0x\n",
    334   1.5       jdc 	    buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6], buf[7]));
    335   1.5       jdc 	if (0 == memcmp(buf, sht1x_sig0, sizeof(sht1x_sig0)))
    336   1.5       jdc 		return UTHUM_TYPE_SHT1x;
    337   1.5       jdc 	if (0 == memcmp(buf, sht1x_sig1, sizeof(sht1x_sig1)))
    338   1.1     tonio 		return UTHUM_TYPE_SHT1x;
    339   1.1     tonio 	if (0 == memcmp(buf, temper_sig, sizeof(temper_sig)))
    340   1.1     tonio 		return UTHUM_TYPE_TEMPER;
    341   1.1     tonio 
    342   1.1     tonio 	return UTHUM_TYPE_UNKNOWN;
    343   1.1     tonio }
    344   1.1     tonio 
    345   1.1     tonio 
    346   1.1     tonio static void
    347   1.1     tonio uthum_refresh(struct sysmon_envsys *sme, envsys_data_t *edata)
    348   1.1     tonio {
    349   1.1     tonio 	struct uthum_softc *sc = sme->sme_cookie;
    350   1.1     tonio 	uint8_t buf[8];
    351   1.5       jdc 	unsigned int humidity_tick;
    352   1.1     tonio 	int temp, rh;
    353   1.1     tonio 
    354   1.1     tonio 	switch (sc->sc_sensortype) {
    355   1.1     tonio 	case UTHUM_TYPE_SHT1x:
    356  1.12   msaitoh 		if (uthum_read_data(sc, CMD_GETDATA, buf, sizeof(buf), 1000)
    357  1.12   msaitoh 		    != 0) {
    358   1.1     tonio 			DPRINTF(("uthum: data read fail\n"));
    359   1.1     tonio 			sc->sc_sensor[UTHUM_TEMP].state = ENVSYS_SINVALID;
    360   1.1     tonio 			sc->sc_sensor[UTHUM_HUMIDITY].state = ENVSYS_SINVALID;
    361   1.1     tonio 			return;
    362   1.1     tonio 		}
    363   1.5       jdc 		DPRINTF(("%s: read SHT1x data "
    364   1.5       jdc 		    "0x%0x 0x%0x 0x%0x 0x%0x 0x%0x 0x%0x 0x%0x 0x%0x\n",
    365   1.5       jdc 		    sc->sc_sme->sme_name, buf[0], buf[1], buf[2], buf[3],
    366   1.5       jdc 		    buf[4], buf[5], buf[6], buf[7]));
    367   1.1     tonio 
    368   1.1     tonio 		humidity_tick = (buf[2] * 256 + buf[3]) & 0x0fff;
    369   1.1     tonio 
    370   1.5       jdc 		temp = uthum_sht1x_temp(buf[0], buf[1]);
    371   1.1     tonio 		rh = uthum_sht1x_rh(humidity_tick, temp);
    372   1.1     tonio 
    373   1.3      cnst 		sc->sc_sensor[UTHUM_HUMIDITY].value_cur = rh / 1000;
    374   1.1     tonio 		sc->sc_sensor[UTHUM_HUMIDITY].state = ENVSYS_SVALID;
    375   1.1     tonio 		break;
    376   1.1     tonio 	case UTHUM_TYPE_TEMPER:
    377   1.1     tonio 		if (uthum_read_data(sc, CMD_GETTEMP, buf, sizeof(buf), 0) != 0) {
    378   1.1     tonio 			DPRINTF(("uthum: data read fail\n"));
    379   1.1     tonio 			sc->sc_sensor[UTHUM_TEMP].state = ENVSYS_SINVALID;
    380   1.1     tonio 			return;
    381   1.1     tonio 		}
    382   1.5       jdc 		DPRINTF(("%s: read TEMPER data "
    383   1.5       jdc 		    "0x%0x 0x%0x 0x%0x 0x%0x 0x%0x 0x%0x 0x%0x 0x%0x\n",
    384   1.5       jdc 		    sc->sc_sme->sme_name, buf[0], buf[1], buf[2], buf[3],
    385   1.5       jdc 		    buf[4], buf[5], buf[6], buf[7]));
    386   1.5       jdc 		temp = uthum_temper_temp(buf[0], buf[1]);
    387   1.1     tonio 		break;
    388   1.1     tonio 	default:
    389   1.1     tonio 		/* do nothing */
    390   1.1     tonio 		return;
    391   1.1     tonio 	}
    392   1.1     tonio 
    393   1.1     tonio 	sc->sc_sensor[UTHUM_TEMP].value_cur = (temp * 10000) + 273150000;
    394   1.1     tonio 	sc->sc_sensor[UTHUM_TEMP].state = ENVSYS_SVALID;
    395   1.1     tonio }
    396   1.1     tonio 
    397   1.1     tonio /* return C-degree * 100 value */
    398   1.1     tonio int
    399   1.5       jdc uthum_temper_temp(uint8_t msb, uint8_t lsb)
    400   1.1     tonio {
    401   1.5       jdc 	int val;
    402   1.5       jdc 
    403   1.5       jdc 	val = (msb << 8) | lsb;
    404   1.5       jdc 	if (val >= 32768) {
    405   1.5       jdc 		val = val - 65536;
    406   1.5       jdc 	}
    407   1.5       jdc 	val = (val * 100) >> 8;
    408   1.5       jdc 	return val;
    409   1.5       jdc }
    410   1.5       jdc 
    411   1.5       jdc /* return C-degree * 100 value */
    412   1.5       jdc int
    413   1.5       jdc uthum_sht1x_temp(uint8_t msb, uint8_t lsb)
    414   1.5       jdc {
    415   1.5       jdc 	int val;
    416   1.5       jdc 
    417   1.5       jdc 	val = ((msb << 8) + lsb) - 4096;
    418   1.5       jdc 	return val;
    419   1.1     tonio }
    420   1.1     tonio 
    421   1.1     tonio /* return %RH * 1000 */
    422   1.1     tonio int
    423   1.1     tonio uthum_sht1x_rh(unsigned int ticks, int temp)
    424   1.1     tonio {
    425   1.1     tonio 	int rh_l, rh;
    426   1.1     tonio 
    427   1.1     tonio 	rh_l = (-40000 + 405 * ticks) - ((7 * ticks * ticks) / 250);
    428   1.1     tonio 	rh = ((temp - 2500) * (1 + (ticks >> 7)) + rh_l) / 10;
    429   1.1     tonio 	return rh;
    430   1.1     tonio }
    431