1 /*-
3  * Copyright (c) 2013-2014 Luiz Otavio O Souza <loos@freebsd.org>
64 #define	LM75_MIN_TEMP		-55
138 		return (-1);  in lm75_read()
151 		return (-1);  in lm75_write()
165 	sc->sc_max_resolution = 9;  in lm75_probe()
173 	switch (compat_ptr->ocd_data){  in lm75_probe()
175 		sc->sc_max_resolution = 9;  in lm75_probe()
178 		sc->sc_max_resolution = 11;  in lm75_probe()
195 	sc->sc_dev = dev;  in lm75_attach()
196 	sc->sc_addr = iicbus_get_addr(dev);  in lm75_attach()
198 	sc->enum_hook.ich_func = lm75_start;  in lm75_attach()
199 	sc->enum_hook.ich_arg = dev;  in lm75_attach()
201 	switch (sc->sc_max_resolution) {  in lm75_attach()
203 		sc->sc_resolution = 9;  in lm75_attach()
204 		sc->sc_max_resolution = 9;  in lm75_attach()
205 		sc->sc_multiplier = 10;  in lm75_attach()
208 		sc->sc_resolution = 11;  in lm75_attach()
209 		sc->sc_max_resolution = 11;  in lm75_attach()
210 		sc->sc_multiplier = 1000;  in lm75_attach()
220 	if (config_intrhook_establish(&sc->enum_hook) != 0)  in lm75_attach()
235 		return (-1);  in lm75_type_detect()
236 	conf = sc->sc_conf;  in lm75_type_detect()
242 	sc->sc_conf = LM75_TEST_PATTERN;  in lm75_type_detect()
244 		return (-1);  in lm75_type_detect()
251 		return (-1);  in lm75_type_detect()
252 	if (sc->sc_conf != LM75_TEST_PATTERN)  in lm75_type_detect()
253 		return (-1);  in lm75_type_detect()
258 	 * LM75 will return the last read value - our test pattern written to  in lm75_type_detect()
263 		if (lm75_read(sc->sc_dev, sc->sc_addr, i,  in lm75_type_detect()
265 			return (-1);  in lm75_type_detect()
267 			return (-1);  in lm75_type_detect()
272 		sc->sc_multiplier = 1000;  in lm75_type_detect()
273 		sc->sc_resolution = 11;  in lm75_type_detect()
274 		sc->sc_max_resolution = 11;  in lm75_type_detect()
278 	sc->sc_conf = conf;  in lm75_type_detect()
280 		return (-1);  in lm75_type_detect()
301 	config_intrhook_disestablish(&sc->enum_hook);  in lm75_start()
314 	device_printf(dev,"%d bit resolution sensor attached.\n",  in lm75_start()
315 			sc->sc_resolution);  in lm75_start()
317 	if (sc->sc_multiplier == 1000)  in lm75_start()
346 	SYSCTL_ADD_PROC(ctx, tree, OID_AUTO, "resolution",  in lm75_start()
348 	    lm75_resolution_sysctl, "IU", "LM75 resolution");  in lm75_start()
356 	if (lm75_read(sc->sc_dev, sc->sc_addr, LM75_CONF,  in lm75_conf_read()
358 		return (-1);  in lm75_conf_read()
359 	sc->sc_conf = (uint32_t)buf8;  in lm75_conf_read()
370 	buf8[1] = (uint8_t)sc->sc_conf & LM75_CONF_MASK;  in lm75_conf_write()
371 	if (lm75_write(sc->sc_dev, sc->sc_addr, buf8, sizeof(buf8)) < 0)  in lm75_conf_write()
372 		return (-1);  in lm75_conf_write()
382 	uint8_t resolution = sc->sc_resolution;  in lm75_temp_read()  local
383 	uint16_t multiplier = sc->sc_multiplier;  in lm75_temp_read()
385 	if (lm75_read(sc->sc_dev, sc->sc_addr, reg, buf8, sizeof(buf8)) < 0)  in lm75_temp_read()
386 		return (-1);  in lm75_temp_read()
389 	*temp = ((buf >> (16 - resolution)) * multiplier) >> (resolution - 8);  in lm75_temp_read()
391 	*temp += TZ_ZEROC * sc->sc_multiplier / TZ_ZEROC_DIVIDER;  in lm75_temp_read()
400 	uint8_t buf8[3], resolution = sc->sc_resolution;  in lm75_temp_write()  local
401 	uint16_t multiplier = sc->sc_multiplier;  in lm75_temp_write()
403 	temp -= TZ_ZEROC * multiplier / TZ_ZEROC_DIVIDER;  in lm75_temp_write()
409 	buf = ((temp << (resolution - 8)) / multiplier) << (16 - resolution);  in lm75_temp_write()
415 	if (lm75_write(sc->sc_dev, sc->sc_addr, buf8, sizeof(buf8)) < 0)  in lm75_temp_write()
416 		return (-1);  in lm75_temp_write()
426 	rtrn = -1;  in lm75_str_mode()
441 	rtrn = -1;  in lm75_str_pol()
443 	if (len > 1 && strncasecmp("high", buf, len) == 0)  in lm75_str_pol()
447 	else if (len > 8 && strncasecmp("active-high", buf, len) == 0)  in lm75_str_pol()
449 	else if (len > 8 && strncasecmp("active-low", buf, len) == 0)  in lm75_str_pol()
472 	if (error != 0 || req->newptr == NULL)  in lm75_temp_sysctl()
491 	tmp = (sc->sc_conf & LM75_CONF_FAULT) >> LM75_CONF_FSHIFT;  in lm75_faults_sysctl()
493 		tmp = nitems(lm75_faults) - 1;  in lm75_faults_sysctl()
497 	if (error != 0 || req->newptr == NULL)  in lm75_faults_sysctl()
505 		sc->sc_conf &= ~LM75_CONF_FAULT;  in lm75_faults_sysctl()
506 		sc->sc_conf |= newf << LM75_CONF_FSHIFT;  in lm75_faults_sysctl()
524 	if (sc->sc_conf & LM75_CONF_MODE) {  in lm75_mode_sysctl()
533 	if (error != 0 || req->newptr == NULL)  in lm75_mode_sysctl()
537 	if (newm != -1 && mode != newm) {  in lm75_mode_sysctl()
538 		sc->sc_conf &= ~LM75_CONF_MODE;  in lm75_mode_sysctl()
540 			sc->sc_conf |= LM75_CONF_MODE;  in lm75_mode_sysctl()
558 	if (sc->sc_conf & LM75_CONF_POL) {  in lm75_pol_sysctl()
560 		strlcpy(buf, "active-high", sizeof(buf));  in lm75_pol_sysctl()
563 		strlcpy(buf, "active-low", sizeof(buf));  in lm75_pol_sysctl()
567 	if (error != 0 || req->newptr == NULL)  in lm75_pol_sysctl()
571 	if (newp != -1 && pol != newp) {  in lm75_pol_sysctl()
572 		sc->sc_conf &= ~LM75_CONF_POL;  in lm75_pol_sysctl()
574 			sc->sc_conf |= LM75_CONF_POL;  in lm75_pol_sysctl()
591 	tmp = shutdown = (sc->sc_conf & LM75_CONF_SHUTD) ? 1 : 0;  in lm75_shutdown_sysctl()
594 	if (error != 0 || req->newptr == NULL)  in lm75_shutdown_sysctl()
598 		sc->sc_conf &= ~LM75_CONF_SHUTD;  in lm75_shutdown_sysctl()
600 			sc->sc_conf |= LM75_CONF_SHUTD;  in lm75_shutdown_sysctl()
614 	int resolution;  in lm75_resolution_sysctl()  local
618 	resolution = sc->sc_resolution;  in lm75_resolution_sysctl()
620 	error = sysctl_handle_int(oidp, &resolution, 0, req);  in lm75_resolution_sysctl()
621 	if (error != 0 || req->newptr == NULL)  in lm75_resolution_sysctl()
624 	if (resolution > sc->sc_max_resolution || resolution < 9)  in lm75_resolution_sysctl()
627 	sc->sc_resolution = (uint8_t) resolution;  in lm75_resolution_sysctl()