94 static int iicbb_transfer(device_t dev, struct iic_msg *msgs, uint32_t nmsgs);
137 iicbb_probe(device_t dev)  in iicbb_probe()  argument
139 	device_set_desc(dev, "I2C bit-banging driver");  in iicbb_probe()
145 iicbb_attach(device_t dev)  in iicbb_attach()  argument
147 	struct iicbb_softc *sc = (struct iicbb_softc *)device_get_softc(dev);  in iicbb_attach()
149 	sc->iicbus = device_add_child(dev, "iicbus", -1);  in iicbb_attach()
155 	SYSCTL_ADD_UINT(device_get_sysctl_ctx(dev),  in iicbb_attach()
156 	    SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO,  in iicbb_attach()
160 	SYSCTL_ADD_UINT(device_get_sysctl_ctx(dev),  in iicbb_attach()
161 	    SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO,  in iicbb_attach()
164 	SYSCTL_ADD_UINT(device_get_sysctl_ctx(dev),  in iicbb_attach()
165 	    SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO,  in iicbb_attach()
169 	bus_generic_attach(dev);  in iicbb_attach()
174 iicbb_detach(device_t dev)  in iicbb_detach()  argument
177 	bus_generic_detach(dev);  in iicbb_detach()
178 	device_delete_children(dev);  in iicbb_detach()
185 iicbb_get_node(device_t bus, device_t dev)  in iicbb_get_node()  argument
194 iicbb_child_detached( device_t dev, device_t child )  in iicbb_child_detached()  argument
196 	struct iicbb_softc *sc = (struct iicbb_softc *)device_get_softc(dev);  in iicbb_child_detached()
203 iicbb_print_child(device_t bus, device_t dev)  in iicbb_print_child()  argument
209 	retval += bus_print_child_header(bus, dev);  in iicbb_print_child()
241 #define	I2C_GETSDA(dev)		(IICBB_GETSDA(device_get_parent(dev)))  argument
242 #define	I2C_SETSDA(dev, x)	(IICBB_SETSDA(device_get_parent(dev), x))  argument
243 #define	I2C_GETSCL(dev)		(IICBB_GETSCL(device_get_parent(dev)))  argument
244 #define	I2C_SETSCL(dev, x)	(IICBB_SETSCL(device_get_parent(dev), x))  argument
247 iicbb_waitforscl(device_t dev)  in iicbb_waitforscl()  argument
249 	struct iicbb_softc *sc = device_get_softc(dev);  in iicbb_waitforscl()
258 		if (I2C_GETSCL(dev))  in iicbb_waitforscl()
266 		if (I2C_GETSCL(dev))  in iicbb_waitforscl()
277 iicbb_clockin(device_t dev, int sda)  in iicbb_clockin()  argument
291 	I2C_SETSDA(dev, sda);  in iicbb_clockin()
292 	I2C_SETSCL(dev, 1);  in iicbb_clockin()
293 	return (iicbb_waitforscl(dev));  in iicbb_clockin()
301 iicbb_clockout(device_t dev)  in iicbb_clockout()  argument
303 	struct iicbb_softc *sc = device_get_softc(dev);  in iicbb_clockout()
310 	I2C_SETSCL(dev, 0);  in iicbb_clockout()
315 iicbb_sendbit(device_t dev, int bit)  in iicbb_sendbit()  argument
317 	struct iicbb_softc *sc = device_get_softc(dev);  in iicbb_sendbit()
320 	err = iicbb_clockin(dev, bit);  in iicbb_sendbit()
324 	iicbb_clockout(dev);  in iicbb_sendbit()
343 iicbb_getack(device_t dev)  in iicbb_getack()  argument
345 	struct iicbb_softc *sc = device_get_softc(dev);  in iicbb_getack()
350 	err = iicbb_clockin(dev, 1);  in iicbb_getack()
358 		noack = I2C_GETSDA(dev);  in iicbb_getack()
365 	iicbb_clockout(dev);  in iicbb_getack()
372 iicbb_sendbyte(device_t dev, uint8_t data)  in iicbb_sendbyte()  argument
377 		err = iicbb_sendbit(dev, (data & (1 << i)) != 0);  in iicbb_sendbyte()
388 iicbb_readbyte(device_t dev, bool last, uint8_t *data)  in iicbb_readbyte()  argument
390 	struct iicbb_softc *sc = device_get_softc(dev);  in iicbb_readbyte()
399 	I2C_SETSDA(dev, 1);  in iicbb_readbyte()
401 		I2C_SETSCL(dev, 1);  in iicbb_readbyte()
402 		err = iicbb_waitforscl(dev);  in iicbb_readbyte()
408 		if (I2C_GETSDA(dev))  in iicbb_readbyte()
411 		iicbb_clockout(dev);  in iicbb_readbyte()
418 	iicbb_sendbit(dev, last);  in iicbb_readbyte()
424 iicbb_callback(device_t dev, int index, caddr_t data)  in iicbb_callback()  argument
426 	return (IICBB_CALLBACK(device_get_parent(dev), index, data));  in iicbb_callback()
430 iicbb_reset(device_t dev, u_char speed, u_char addr, u_char *oldaddr)  in iicbb_reset()  argument
432 	iicbb_set_speed(device_get_softc(dev), speed);  in iicbb_reset()
433 	return (IICBB_RESET(device_get_parent(dev), speed, addr, oldaddr));  in iicbb_reset()
437 iicbb_start_impl(device_t dev, u_char slave, bool repstart)  in iicbb_start_impl()  argument
439 	struct iicbb_softc *sc = device_get_softc(dev);  in iicbb_start_impl()
446 		if (iicbb_waitforscl(dev) != 0) {  in iicbb_start_impl()
452 		error = iicbb_clockin(dev, 1);  in iicbb_start_impl()
464 	if (!I2C_GETSDA(dev)) {  in iicbb_start_impl()
470 	I2C_SETSDA(dev, 0);  in iicbb_start_impl()
476 	iicbb_clockout(dev);  in iicbb_start_impl()
479 	error = iicbb_sendbyte(dev, slave);  in iicbb_start_impl()
483 		error = iicbb_getack(dev);  in iicbb_start_impl()
485 		(void)iicbb_stop(dev);  in iicbb_start_impl()
491 iicbb_start(device_t dev, u_char slave, int timeout)  in iicbb_start()  argument
493 	return (iicbb_start_impl(dev, slave, false));  in iicbb_start()
498 iicbb_repstart(device_t dev, u_char slave, int timeout)  in iicbb_repstart()  argument
500 	return (iicbb_start_impl(dev, slave, true));  in iicbb_repstart()
504 iicbb_stop(device_t dev)  in iicbb_stop()  argument
506 	struct iicbb_softc *sc = device_get_softc(dev);  in iicbb_stop()
512 	err = iicbb_clockin(dev, 0);  in iicbb_stop()
516 	I2C_SETSDA(dev, 1);  in iicbb_stop()
526 iicbb_write(device_t dev, const char *buf, int len, int *sent, int timeout)  in iicbb_write()  argument
533 		iicbb_sendbyte(dev, (uint8_t)*buf++);  in iicbb_write()
536 		error = iicbb_getack(dev);  in iicbb_write()
549 iicbb_read(device_t dev, char *buf, int len, int *read, int last, int delay)  in iicbb_read()  argument
555 		err = iicbb_readbyte(dev, (len == 1) ? last : 0,  in iicbb_read()
569 iicbb_transfer(device_t dev, struct iic_msg *msgs, uint32_t nmsgs)  in iicbb_transfer()  argument
573 	error = IICBB_PRE_XFER(device_get_parent(dev));  in iicbb_transfer()
577 	error = iicbus_transfer_gen(dev, msgs, nmsgs);  in iicbb_transfer()
579 	IICBB_POST_XFER(device_get_parent(dev));  in iicbb_transfer()