1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
65 	while (counter--) {  in pcf_wait_byte()
83 	device_printf(dev, " >> stop\n");  in pcf_stop_locked()
86 	 * Send STOP condition iff the START condition was previously sent.  in pcf_stop_locked()
87 	 * STOP is sent only once even if an iicbus_stop() is called after  in pcf_stop_locked()
88 	 * an iicbus_read()... see pcf_read(): the PCF needs to send the stop  in pcf_stop_locked()
91 	if (sc->pcf_started) {  in pcf_stop_locked()
92 		/* set stop condition and enable IT */  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()
111 	} while (k--);  in pcf_noack()
128 	pcf_set_S1(sc, ESO|STA|STO|ACK);  in pcf_repeated_start()
138 	/* check for ack */  in pcf_repeated_start()
142 		printf("pcf: no ack on repeated_start!\n");  in pcf_repeated_start()
179 	pcf_set_S1(sc, PIN|ESO|STA|ACK);  in pcf_start()
181 	sc->pcf_started = 1;  in pcf_start()
187 	/* check for ACK */  in pcf_start()
191 		printf("pcf: no ack on start!\n");  in pcf_start()
211 	device_printf(dev, " >> stop\n");  in pcf_stop()
242 		iicbus_intr(sc->iicbus, INTR_ERROR, &error);  in pcf_intr()
250 		switch(sc->pcf_slave_mode) {  in pcf_intr()
253 				/* ack interrupt line */  in pcf_intr()
256 				/* no ack, don't send anymore */  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()
291 			/* stop condition received? */  in pcf_intr()
293 				/* ack interrupt line */  in pcf_intr()
296 				/* emulate intr stop condition */  in pcf_intr()
297 				iicbus_intr(sc->iicbus, INTR_STOP, NULL);  in pcf_intr()
300 				/* get data, ack interrupt line */  in pcf_intr()
304 				iicbus_intr(sc->iicbus, INTR_RECEIVE, &data);  in pcf_intr()
310 				sc->pcf_slave_mode);  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()
346 	pcf_set_S0(sc, sc->pcf_addr >> 1);  in pcf_rst_card()
368 	/* set bus on, ack=yes, INT=yes */  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()
397 		/* check if ack received */  in pcf_write()
403 		len --;  in pcf_write()
435 			pcf_set_S1(sc, ESO);		/* no ack */  in pcf_read()
456 			/* next trigged byte with no ack */  in pcf_read()
462 		len --;  in pcf_read()