1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
56  * Polling mode for master operations wait for a new
65 	while (counter--) {  in pcf_wait_byte()
66 		if ((pcf_get_S1(sc) & PIN) == 0)  in pcf_wait_byte()
91 	if (sc->pcf_started) {  in pcf_stop_locked()
93 		pcf_set_S1(sc, PIN|ESO|ENI|STO|ACK);  in pcf_stop_locked()
95 		sc->pcf_started = 0;  in pcf_stop_locked()
110 		DELAY(10);				/* XXX wait 10 us */  in pcf_noack()
111 	} while (k--);  in pcf_noack()
134 	/* wait for address sent, polling */  in pcf_repeated_start()
179 	pcf_set_S1(sc, PIN|ESO|STA|ACK);  in pcf_start()
181 	sc->pcf_started = 1;  in pcf_start()
183 	/* wait for address sent, polling */  in pcf_start()
230 	if (status & PIN) {  in pcf_intr()
242 		iicbus_intr(sc->iicbus, INTR_ERROR, &error);  in pcf_intr()
250 		switch(sc->pcf_slave_mode) {  in pcf_intr()
257 				sc->pcf_slave_mode = SLAVE_RECEIVER;  in pcf_intr()
259 				iicbus_intr(sc->iicbus, INTR_NOACK, NULL);  in pcf_intr()
264 			iicbus_intr(sc->iicbus, INTR_TRANSMIT, &data);  in pcf_intr()
274 					iicbus_intr(sc->iicbus, INTR_GENERAL, &addr);  in pcf_intr()
276 					iicbus_intr(sc->iicbus, INTR_START, &addr);  in pcf_intr()
279 					sc->pcf_slave_mode = SLAVE_TRANSMITTER;  in pcf_intr()
282 					iicbus_intr(sc->iicbus, INTR_TRANSMIT, &data);  in pcf_intr()
297 				iicbus_intr(sc->iicbus, INTR_STOP, NULL);  in pcf_intr()
304 				iicbus_intr(sc->iicbus, INTR_RECEIVE, &data);  in pcf_intr()
310 				sc->pcf_slave_mode);  in pcf_intr()
313 	} while ((pcf_get_S1(sc) & PIN) == 0);  in pcf_intr()
320 	pcf_set_S1(sc, PIN|ESO|ENI|ACK);  in pcf_intr()
322 	sc->pcf_slave_mode = SLAVE_RECEIVER;  in pcf_intr()
335 		*oldaddr = sc->pcf_addr;  in pcf_rst_card()
339 		sc->pcf_addr = PCF_DEFAULT_ADDR;  in pcf_rst_card()
341 		sc->pcf_addr = addr;  in pcf_rst_card()
343 	pcf_set_S1(sc, PIN);				/* initialize S1 */  in pcf_rst_card()
346 	pcf_set_S0(sc, sc->pcf_addr >> 1);  in pcf_rst_card()
349 	pcf_set_S1(sc, PIN|ES1);  in pcf_rst_card()
369 	pcf_set_S1(sc, PIN|ESO|ENI|ACK);  in pcf_rst_card()
371 	sc->pcf_slave_mode = SLAVE_RECEIVER;  in pcf_rst_card()
393 		/* wait for the byte to be send */  in pcf_write()
403 		len --;  in pcf_write()
444 		/* wait for trigged byte */  in pcf_read()
462 		len --;  in pcf_read()