1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
65 	while (counter--) {  in pcf_wait_byte()
91 	if (sc->pcf_started) {  in pcf_stop_locked()
95 		sc->pcf_started = 0;  in pcf_stop_locked()
111 	} while (k--);  in pcf_noack()
117 pcf_repeated_start(device_t dev, u_char slave, int timeout)  in pcf_repeated_start()  argument
124 	device_printf(dev, " >> repeated start for slave %#x\n",  in pcf_repeated_start()
125 		      (unsigned)slave);  in pcf_repeated_start()
130 	/* set slave address to PCF. Last bit (LSB) must be set correctly  in pcf_repeated_start()
132 	pcf_set_S0(sc, slave);  in pcf_repeated_start()
157 pcf_start(device_t dev, u_char slave, int timeout)  in pcf_start()  argument
164 	device_printf(dev, " >> start for slave %#x\n", (unsigned)slave);  in pcf_start()
174 	/* set slave address to PCF. Last bit (LSB) must be set correctly  in pcf_start()
176 	pcf_set_S0(sc, slave);  in pcf_start()
181 	sc->pcf_started = 1;  in pcf_start()
224 	char data, status, addr;  in pcf_intr()  local
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()
271 				addr = pcf_get_S0(sc);  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()
278 				if (addr & LSB) {  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()
309 			panic("%s: unknown slave mode (%d)!", __func__,  in pcf_intr()
310 				sc->pcf_slave_mode);  in pcf_intr()
322 	sc->pcf_slave_mode = SLAVE_RECEIVER;  in pcf_intr()
329 pcf_rst_card(device_t dev, u_char speed, u_char addr, u_char *oldaddr)  in pcf_rst_card()  argument
335 		*oldaddr = sc->pcf_addr;  in pcf_rst_card()
338 	if (!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()
371 	sc->pcf_slave_mode = SLAVE_RECEIVER;  in pcf_rst_card()
403 		len --;  in pcf_write()
451 			/* ok, last data byte already in S0, no I2C activity  in pcf_read()
462 		len --;  in pcf_read()