1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
44  * system errno value later.  This lets controller- and bus-layer code get
54  * Translate IIC_Exxxxx status values to vaguely-equivelent errno values.
75 		 * IIC_ERRNO marker bit.  If lots of high-order bits are set,  in iic2errno()
76 		 * then it's one of the negative pseudo-errors such as ERESTART  in iic2errno()
77 		 * and we return it as-is.  Otherwise it's a plain "small  in iic2errno()
99 	if (sc->owner)  in iicbus_intr()
100 		IICBUS_INTR(sc->owner, event, buf);  in iicbus_intr()
113 		error = mtx_sleep(sc, &sc->lock, IICPRI|PCATCH, "iicreq", 0);  in iicbus_poll()
117 		error = mtx_sleep(sc, &sc->lock, IICPRI, "iicreq", 0);  in iicbus_poll()
144 		if (sc->owner == NULL)  in iicbus_request_bus()
146 		if ((how & IIC_RECURSIVE) && sc->owner == dev)  in iicbus_request_bus()
153 		++sc->owncount;  in iicbus_request_bus()
154 		if (sc->owner == NULL) {  in iicbus_request_bus()
155 			sc->owner = dev;  in iicbus_request_bus()
164 				sc->busydev = bus;  in iicbus_request_bus()
166 				sc->busydev = dev;  in iicbus_request_bus()
167 			device_busy(sc->busydev);  in iicbus_request_bus()
184 				sc->owner = NULL;  in iicbus_request_bus()
185 				sc->owncount = 0;  in iicbus_request_bus()
187 				device_unbusy(sc->busydev);  in iicbus_request_bus()
210 	if (sc->owner != dev) {  in iicbus_release_bus()
215 	if (--sc->owncount == 0) {  in iicbus_release_bus()
216 		/* Drop the lock while informing the low-level driver. */  in iicbus_release_bus()
224 		sc->owner = NULL;  in iicbus_release_bus()
226 		device_unbusy(sc->busydev);  in iicbus_release_bus()
242 	return (sc->started);  in iicbus_started()
256 	if (sc->started)  in iicbus_start()
260 		sc->started = slave;  in iicbus_start()
262 		sc->started = 0;  in iicbus_start()
278 	if (!sc->started)  in iicbus_repeated_start()
282 		sc->started = slave;  in iicbus_repeated_start()
284 		sc->started = 0;  in iicbus_repeated_start()
300 	if (!sc->started)  in iicbus_stop()
306 	sc->started = 0;  in iicbus_stop()
323 	if (sc->started == 0 || (sc->strict != 0 && (sc->started & LSB) != 0))  in iicbus_write()
341 	if (sc->started == 0 || (sc->strict != 0 && (sc->started & LSB) == 0))  in iicbus_read()
360 	if (sc->started == 0 || (sc->strict != 0 && (sc->started & LSB) != 0))  in iicbus_write_byte()
378 	if (sc->started == 0 || (sc->strict != 0 && (sc->started & LSB) == 0))  in iicbus_read_byte()
392 	u_char addr = slave & ~LSB;  in iicbus_block_write()
413 	u_char addr = slave | LSB;  in iicbus_block_read()
485 			addr |= LSB;  in iicbus_transfer_gen()
487 			addr &= ~LSB;  in iicbus_transfer_gen()
528 	 * Two transfers back to back with a repeat-start between them; first we  in iicdev_readfrom()
529 	 * write the address-within-device, then we read from the device.  in iicdev_readfrom()
557 	 * between them using an array of 2 iic_msgs; first we'd write the  in iicdev_writeto()