1 /*-
137 	pause("owtstart", device_get_unit(sc->dev) * hz / 100);	// 10ms stagger  in ow_temp_event_thread()
138 	mtx_lock(&sc->temp_lock);  in ow_temp_event_thread()
139 	sc->flags |= OW_TEMP_RUNNING;  in ow_temp_event_thread()
140 	mtx_unlock(&sc->temp_lock);  in ow_temp_event_thread()
141 	ow_temp_read_power_supply(sc->dev, &sc->parasite);  in ow_temp_event_thread()
142 	if (sc->parasite)  in ow_temp_event_thread()
143 		device_printf(sc->dev, "Running in parasitic mode unsupported\n");  in ow_temp_event_thread()
144 	mtx_lock(&sc->temp_lock);  in ow_temp_event_thread()
145 	while ((sc->flags & OW_TEMP_DONE) == 0) {  in ow_temp_event_thread()
146 		mtx_unlock(&sc->temp_lock);  in ow_temp_event_thread()
147 		ow_temp_convert_t(sc->dev);  in ow_temp_event_thread()
148 		mtx_lock(&sc->temp_lock);  in ow_temp_event_thread()
149 		msleep(sc, &sc->temp_lock, 0, "owtcvt", hz);  in ow_temp_event_thread()
150 		if (sc->flags & OW_TEMP_DONE)  in ow_temp_event_thread()
152 		mtx_unlock(&sc->temp_lock);  in ow_temp_event_thread()
153 		for (retries = 5; retries > 0; retries--) {  in ow_temp_event_thread()
154 			rv = ow_temp_read_scratchpad(sc->dev, scratch, sizeof(scratch));  in ow_temp_event_thread()
156 				crc = own_crc(sc->dev, scratch, sizeof(scratch) - 1);  in ow_temp_event_thread()
158 					if (sc->type == OWT_DS1820) {  in ow_temp_event_thread()
166 							tmp += 16 - scratch[6] - 4; /* count_per_c == 16 */  in ow_temp_event_thread()
171 					sc->temp = tmp * 1000 / 16 + 273150;  in ow_temp_event_thread()
174 				sc->bad_crc++;  in ow_temp_event_thread()
176 				sc->bad_reads++;  in ow_temp_event_thread()
178 		mtx_lock(&sc->temp_lock);  in ow_temp_event_thread()
179 		msleep(sc, &sc->temp_lock, 0, "owtcvt", sc->reading_interval);  in ow_temp_event_thread()
181 	sc->flags &= ~OW_TEMP_RUNNING;  in ow_temp_event_thread()
182 	mtx_unlock(&sc->temp_lock);  in ow_temp_event_thread()
192 	sc->dev = dev;  in ow_temp_attach()
193 	sc->type = ow_get_family(dev);  in ow_temp_attach()
198 	    &sc->temp, 0, sysctl_handle_int,  in ow_temp_attach()
203 	    &sc->bad_crc, 0,  in ow_temp_attach()
208 	    &sc->bad_reads, 0,  in ow_temp_attach()
213 	    &sc->reading_interval, 0,  in ow_temp_attach()
218 	    &sc->parasite, 0,  in ow_temp_attach()
225 	sc->temp = -1;  in ow_temp_attach()
226 	sc->reading_interval = 10 * hz;  in ow_temp_attach()
227 	mtx_init(&sc->temp_lock, "lock for doing temperature", NULL, MTX_DEF);  in ow_temp_attach()
229 	if (kproc_create(ow_temp_event_thread, sc, &sc->event_thread, 0, 0,  in ow_temp_attach()
253 	mtx_lock(&sc->temp_lock);  in ow_temp_detach()
254 	sc->flags |= OW_TEMP_DONE;  in ow_temp_detach()
255 	while (sc->flags & OW_TEMP_RUNNING) {  in ow_temp_detach()
257 		msleep(sc->event_thread, &sc->temp_lock, PWAIT, "owtun", 0);  in ow_temp_detach()
259 	mtx_destroy(&sc->temp_lock);  in ow_temp_detach()