86 static int iicbb_transfer(device_t dev, struct iic_msg *msgs, uint32_t nmsgs);
128 iicbb_probe(device_t dev)  in iicbb_probe()  argument
130 	device_set_desc(dev, "I2C bit-banging driver");  in iicbb_probe()
136 iicbb_attach(device_t dev)  in iicbb_attach()  argument
138 	struct iicbb_softc *sc = (struct iicbb_softc *)device_get_softc(dev);  in iicbb_attach()
140 	sc->iicbus = device_add_child(dev, "iicbus", -1);  in iicbb_attach()
144 	bus_generic_attach(dev);  in iicbb_attach()
150 iicbb_detach(device_t dev)  in iicbb_detach()  argument
153 	bus_generic_detach(dev);  in iicbb_detach()
154 	device_delete_children(dev);  in iicbb_detach()
161 iicbb_get_node(device_t bus, device_t dev)  in iicbb_get_node()  argument
170 iicbb_child_detached( device_t dev, device_t child )  in iicbb_child_detached()  argument
172 	struct iicbb_softc *sc = (struct iicbb_softc *)device_get_softc(dev);  in iicbb_child_detached()
179 iicbb_print_child(device_t bus, device_t dev)  in iicbb_print_child()  argument
185 	retval += bus_print_child_header(bus, dev);  in iicbb_print_child()
202 #define I2C_SETSDA(sc,dev,val) do {			\  argument
203 	IICBB_SETSDA(device_get_parent(dev), val);	\
207 #define I2C_SETSCL(dev,val) do {			\  argument
208 	iicbb_setscl(dev, val, 100);			\
211 #define I2C_SET(sc,dev,ctrl,data) do {			\  argument
212 	I2C_SETSCL(dev, ctrl);				\
213 	I2C_SETSDA(sc, dev, data);			\
216 #define I2C_GETSDA(dev) (IICBB_GETSDA(device_get_parent(dev)))  argument
218 #define I2C_GETSCL(dev) (IICBB_GETSCL(device_get_parent(dev)))  argument
230 iicbb_setscl(device_t dev, int val, int timeout)  in iicbb_setscl()  argument
232 	struct iicbb_softc *sc = device_get_softc(dev);  in iicbb_setscl()
235 	IICBB_SETSCL(device_get_parent(dev), val);  in iicbb_setscl()
238 	while (val && !I2C_GETSCL(dev) && k++ < timeout) {  in iicbb_setscl()
239 		IICBB_SETSCL(device_get_parent(dev), val);  in iicbb_setscl()
247 iicbb_one(device_t dev, int timeout)  in iicbb_one()  argument
249 	struct iicbb_softc *sc = device_get_softc(dev);  in iicbb_one()
251 	I2C_SET(sc,dev,0,1);  in iicbb_one()
252 	I2C_SET(sc,dev,1,1);  in iicbb_one()
253 	I2C_SET(sc,dev,0,1);  in iicbb_one()
258 iicbb_zero(device_t dev, int timeout)  in iicbb_zero()  argument
260 	struct iicbb_softc *sc = device_get_softc(dev);  in iicbb_zero()
262 	I2C_SET(sc,dev,0,0);  in iicbb_zero()
263 	I2C_SET(sc,dev,1,0);  in iicbb_zero()
264 	I2C_SET(sc,dev,0,0);  in iicbb_zero()
283 iicbb_ack(device_t dev, int timeout)  in iicbb_ack()  argument
285 	struct iicbb_softc *sc = device_get_softc(dev);  in iicbb_ack()
289 	I2C_SET(sc,dev,0,1);  in iicbb_ack()
290 	I2C_SET(sc,dev,1,1);  in iicbb_ack()
292 		noack = I2C_GETSDA(dev);  in iicbb_ack()
299 	I2C_SET(sc,dev,0,1);  in iicbb_ack()
306 iicbb_sendbyte(device_t dev, u_char data, int timeout)  in iicbb_sendbyte()  argument
312 			iicbb_one(dev, timeout);  in iicbb_sendbyte()
314 			iicbb_zero(dev, timeout);  in iicbb_sendbyte()
322 iicbb_readbyte(device_t dev, int last, int timeout)  in iicbb_readbyte()  argument
324 	struct iicbb_softc *sc = device_get_softc(dev);  in iicbb_readbyte()
328 	I2C_SET(sc,dev,0,1);  in iicbb_readbyte()
331 		I2C_SET(sc,dev,1,1);  in iicbb_readbyte()
332 		if (I2C_GETSDA(dev))  in iicbb_readbyte()
334 		I2C_SET(sc,dev,0,1);  in iicbb_readbyte()
337 		iicbb_one(dev, timeout);  in iicbb_readbyte()
339 		iicbb_zero(dev, timeout);  in iicbb_readbyte()
346 iicbb_callback(device_t dev, int index, caddr_t data)  in iicbb_callback()  argument
348 	return (IICBB_CALLBACK(device_get_parent(dev), index, data));  in iicbb_callback()
352 iicbb_reset(device_t dev, u_char speed, u_char addr, u_char *oldaddr)  in iicbb_reset()  argument
354 	return (IICBB_RESET(device_get_parent(dev), speed, addr, oldaddr));  in iicbb_reset()
358 iicbb_start(device_t dev, u_char slave, int timeout)  in iicbb_start()  argument
360 	struct iicbb_softc *sc = device_get_softc(dev);  in iicbb_start()
365 	I2C_SET(sc,dev,1,1);  in iicbb_start()
366 	I2C_SET(sc,dev,1,0);  in iicbb_start()
367 	I2C_SET(sc,dev,0,0);  in iicbb_start()
370 	iicbb_sendbyte(dev, slave, timeout);  in iicbb_start()
373 	if (iicbb_ack(dev, timeout)) {  in iicbb_start()
381 	iicbb_stop(dev);  in iicbb_start()
386 iicbb_stop(device_t dev)  in iicbb_stop()  argument
388 	struct iicbb_softc *sc = device_get_softc(dev);  in iicbb_stop()
390 	I2C_SET(sc,dev,0,0);  in iicbb_stop()
391 	I2C_SET(sc,dev,1,0);  in iicbb_stop()
392 	I2C_SET(sc,dev,1,1);  in iicbb_stop()
399 iicbb_write(device_t dev, const char *buf, int len, int *sent, int timeout)  in iicbb_write()  argument
406 		iicbb_sendbyte(dev,(u_char)*buf++, timeout);  in iicbb_write()
409 		if (iicbb_ack(dev, timeout)) {  in iicbb_write()
423 iicbb_read(device_t dev, char * buf, int len, int *read, int last, int delay)  in iicbb_read()  argument
430 		*buf++ = (char)iicbb_readbyte(dev, (len == 1) ? last : 0, delay);  in iicbb_read()
441 iicbb_transfer(device_t dev, struct iic_msg *msgs, uint32_t nmsgs)  in iicbb_transfer()  argument
445 	error = IICBB_PRE_XFER(device_get_parent(dev));  in iicbb_transfer()
449 	error = iicbus_transfer_gen(dev, msgs, nmsgs);  in iicbb_transfer()
451 	IICBB_POST_XFER(device_get_parent(dev));  in iicbb_transfer()