1 /*-
28  * i2c-tiny-usb, DIY USB to IIC bridge (using AVR or RP2040) from
31  *   https://github.com/harbaum/I2C-Tiny-USB
33  *   https://github.com/Nicolai-Electronics/rp2040-i2c-interface
103 	error = usbd_do_request_flags(sc->sc_udev, &sc->sc_mtx, &req, data, 0,  in usb_read()
107 		actlen = -1;  in usb_read()
126 	error = usbd_do_request_flags(sc->sc_udev, &sc->sc_mtx, &req, data, 0,  in usb_write()
130 		actlen = -1;  in usb_write()
143 	if (uaa->usb_mode != USB_MODE_HOST)  in i2ctinyusb_probe()
148 		device_set_desc(dev, "I2C-Tiny-USB I2C interface");  in i2ctinyusb_probe()
167 	sc->sc_udev = uaa->device;  in i2ctinyusb_attach()
168 	mtx_init(&sc->sc_mtx, "i2ctinyusb lock", NULL, MTX_DEF | MTX_RECURSE);  in i2ctinyusb_attach()
170 	sc->iicbus_dev = device_add_child(dev, "iicbus", -1);  in i2ctinyusb_attach()
171 	if (sc->iicbus_dev == NULL) {  in i2ctinyusb_attach()
198 	mtx_destroy(&sc->sc_mtx);  in i2ctinyusb_detach()
210 	struct iic_msg *pmsg;  in i2ctinyusb_transfer()  local
215 	mtx_lock(&sc->sc_mtx);  in i2ctinyusb_transfer()
218 		pmsg = &msgs[i];  in i2ctinyusb_transfer()
221 		if (i == nmsgs - 1)  in i2ctinyusb_transfer()
225 			if ((ret = usb_read(sc, cmd, pmsg->flags, pmsg->slave, pmsg->buf,  in i2ctinyusb_transfer()
226 							pmsg->len)) != pmsg->len) {  in i2ctinyusb_transfer()
232 			if ((ret = usb_write(sc, cmd, pmsg->flags, pmsg->slave, pmsg->buf,  in i2ctinyusb_transfer()
233 							pmsg->len)) != pmsg->len) {  in i2ctinyusb_transfer()
255 	mtx_unlock(&sc->sc_mtx);  in i2ctinyusb_transfer()
267 	mtx_lock(&sc->sc_mtx);  in i2ctinyusb_reset()
269 	mtx_unlock(&sc->sc_mtx);  in i2ctinyusb_reset()
294 	.size = sizeof(struct i2ctinyusb_softc),