1 files changed, 726 insertions, 0 deletions

diff --git a/sys/dev/usb/serial/ulpt.c b/sys/dev/usb/serial/ulpt.c
new file mode 100644
index 0000000..36e082b
--- /dev/null
+++ b/sys/dev/usb/serial/ulpt.c
@@ -0,0 +1,726 @@
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+/*	$NetBSD: ulpt.c,v 1.60 2003/10/04 21:19:50 augustss Exp $	*/
+
+/*-
+ * Copyright (c) 1998, 2003 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Lennart Augustsson (lennart@augustsson.net) at
+ * Carlstedt Research & Technology.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *        This product includes software developed by the NetBSD
+ *        Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * Printer Class spec: http://www.usb.org/developers/data/devclass/usbprint109.PDF
+ * Printer Class spec: http://www.usb.org/developers/devclass_docs/usbprint11.pdf
+ */
+
+#include "usbdevs.h"
+#include <dev/usb/usb.h>
+#include <dev/usb/usb_mfunc.h>
+#include <dev/usb/usb_error.h>
+
+#define	USB_DEBUG_VAR ulpt_debug
+
+#include <dev/usb/usb_core.h>
+#include <dev/usb/usb_debug.h>
+#include <dev/usb/usb_process.h>
+#include <dev/usb/usb_request.h>
+#include <dev/usb/usb_lookup.h>
+#include <dev/usb/usb_util.h>
+#include <dev/usb/usb_busdma.h>
+#include <dev/usb/usb_mbuf.h>
+#include <dev/usb/usb_dev.h>
+#include <dev/usb/usb_parse.h>
+
+#include <sys/syslog.h>
+
+#if USB_DEBUG
+static int ulpt_debug = 0;
+
+SYSCTL_NODE(_hw_usb2, OID_AUTO, ulpt, CTLFLAG_RW, 0, "USB ulpt");
+SYSCTL_INT(_hw_usb2_ulpt, OID_AUTO, debug, CTLFLAG_RW,
+    &ulpt_debug, 0, "Debug level");
+#endif
+
+#define	ULPT_BSIZE		(1<<15)	/* bytes */
+#define	ULPT_IFQ_MAXLEN         2	/* units */
+
+#define	UR_GET_DEVICE_ID        0x00
+#define	UR_GET_PORT_STATUS      0x01
+#define	UR_SOFT_RESET           0x02
+
+#define	LPS_NERR		0x08	/* printer no error */
+#define	LPS_SELECT		0x10	/* printer selected */
+#define	LPS_NOPAPER		0x20	/* printer out of paper */
+#define	LPS_INVERT      (LPS_SELECT|LPS_NERR)
+#define	LPS_MASK        (LPS_SELECT|LPS_NERR|LPS_NOPAPER)
+
+enum {
+	ULPT_BULK_DT_WR,
+	ULPT_BULK_DT_RD,
+	ULPT_INTR_DT_RD,
+	ULPT_N_TRANSFER,
+};
+
+struct ulpt_softc {
+	struct usb2_fifo_sc sc_fifo;
+	struct usb2_fifo_sc sc_fifo_noreset;
+	struct mtx sc_mtx;
+	struct usb2_callout sc_watchdog;
+
+	device_t sc_dev;
+	struct usb2_device *sc_udev;
+	struct usb2_fifo *sc_fifo_open[2];
+	struct usb2_xfer *sc_xfer[ULPT_N_TRANSFER];
+
+	int	sc_fflags;		/* current open flags, FREAD and
+					 * FWRITE */
+	uint8_t	sc_iface_no;
+	uint8_t	sc_last_status;
+	uint8_t	sc_zlps;		/* number of consequtive zero length
+					 * packets received */
+};
+
+/* prototypes */
+
+static device_probe_t ulpt_probe;
+static device_attach_t ulpt_attach;
+static device_detach_t ulpt_detach;
+
+static usb2_callback_t ulpt_write_callback;
+static usb2_callback_t ulpt_read_callback;
+static usb2_callback_t ulpt_status_callback;
+
+static void	ulpt_reset(struct ulpt_softc *);
+static void	ulpt_watchdog(void *);
+
+static usb2_fifo_close_t ulpt_close;
+static usb2_fifo_cmd_t ulpt_start_read;
+static usb2_fifo_cmd_t ulpt_start_write;
+static usb2_fifo_cmd_t ulpt_stop_read;
+static usb2_fifo_cmd_t ulpt_stop_write;
+static usb2_fifo_ioctl_t ulpt_ioctl;
+static usb2_fifo_open_t ulpt_open;
+static usb2_fifo_open_t unlpt_open;
+
+static struct usb2_fifo_methods ulpt_fifo_methods = {
+	.f_close = &ulpt_close,
+	.f_ioctl = &ulpt_ioctl,
+	.f_open = &ulpt_open,
+	.f_start_read = &ulpt_start_read,
+	.f_start_write = &ulpt_start_write,
+	.f_stop_read = &ulpt_stop_read,
+	.f_stop_write = &ulpt_stop_write,
+	.basename[0] = "ulpt",
+};
+
+static struct usb2_fifo_methods unlpt_fifo_methods = {
+	.f_close = &ulpt_close,
+	.f_ioctl = &ulpt_ioctl,
+	.f_open = &unlpt_open,
+	.f_start_read = &ulpt_start_read,
+	.f_start_write = &ulpt_start_write,
+	.f_stop_read = &ulpt_stop_read,
+	.f_stop_write = &ulpt_stop_write,
+	.basename[0] = "unlpt",
+};
+
+static void
+ulpt_reset(struct ulpt_softc *sc)
+{
+	struct usb2_device_request req;
+
+	DPRINTFN(2, "\n");
+
+	req.bRequest = UR_SOFT_RESET;
+	USETW(req.wValue, 0);
+	USETW(req.wIndex, sc->sc_iface_no);
+	USETW(req.wLength, 0);
+
+	/*
+	 * There was a mistake in the USB printer 1.0 spec that gave the
+	 * request type as UT_WRITE_CLASS_OTHER; it should have been
+	 * UT_WRITE_CLASS_INTERFACE.  Many printers use the old one,
+	 * so we try both.
+	 */
+
+	mtx_lock(&sc->sc_mtx);
+	req.bmRequestType = UT_WRITE_CLASS_OTHER;
+	if (usb2_do_request_flags(sc->sc_udev, &sc->sc_mtx,
+	    &req, NULL, 0, NULL, 2 * USB_MS_HZ)) {	/* 1.0 */
+		req.bmRequestType = UT_WRITE_CLASS_INTERFACE;
+		if (usb2_do_request_flags(sc->sc_udev, &sc->sc_mtx,
+		    &req, NULL, 0, NULL, 2 * USB_MS_HZ)) {	/* 1.1 */
+			/* ignore error */
+		}
+	}
+	mtx_unlock(&sc->sc_mtx);
+}
+
+static void
+ulpt_write_callback(struct usb2_xfer *xfer)
+{
+	struct ulpt_softc *sc = xfer->priv_sc;
+	struct usb2_fifo *f = sc->sc_fifo_open[USB_FIFO_TX];
+	uint32_t actlen;
+
+	if (f == NULL) {
+		/* should not happen */
+		DPRINTF("no FIFO\n");
+		return;
+	}
+	DPRINTF("state=0x%x\n", USB_GET_STATE(xfer));
+
+	switch (USB_GET_STATE(xfer)) {
+	case USB_ST_TRANSFERRED:
+	case USB_ST_SETUP:
+tr_setup:
+		if (usb2_fifo_get_data(f, xfer->frbuffers,
+		    0, xfer->max_data_length, &actlen, 0)) {
+
+			xfer->frlengths[0] = actlen;
+			usb2_start_hardware(xfer);
+		}
+		break;
+
+	default:			/* Error */
+		if (xfer->error != USB_ERR_CANCELLED) {
+			/* try to clear stall first */
+			xfer->flags.stall_pipe = 1;
+			goto tr_setup;
+		}
+		break;
+	}
+}
+
+static void
+ulpt_read_callback(struct usb2_xfer *xfer)
+{
+	struct ulpt_softc *sc = xfer->priv_sc;
+	struct usb2_fifo *f = sc->sc_fifo_open[USB_FIFO_RX];
+
+	if (f == NULL) {
+		/* should not happen */
+		DPRINTF("no FIFO\n");
+		return;
+	}
+	DPRINTF("state=0x%x\n", USB_GET_STATE(xfer));
+
+	switch (USB_GET_STATE(xfer)) {
+	case USB_ST_TRANSFERRED:
+
+		if (xfer->actlen == 0) {
+
+			if (sc->sc_zlps == 4) {
+				/* enable BULK throttle */
+				xfer->interval = 500;	/* ms */
+			} else {
+				sc->sc_zlps++;
+			}
+		} else {
+			/* disable BULK throttle */
+
+			xfer->interval = 0;
+			sc->sc_zlps = 0;
+		}
+
+		usb2_fifo_put_data(f, xfer->frbuffers,
+		    0, xfer->actlen, 1);
+
+	case USB_ST_SETUP:
+tr_setup:
+		if (usb2_fifo_put_bytes_max(f) != 0) {
+			xfer->frlengths[0] = xfer->max_data_length;
+			usb2_start_hardware(xfer);
+		}
+		break;
+
+	default:			/* Error */
+		/* disable BULK throttle */
+		xfer->interval = 0;
+		sc->sc_zlps = 0;
+
+		if (xfer->error != USB_ERR_CANCELLED) {
+			/* try to clear stall first */
+			xfer->flags.stall_pipe = 1;
+			goto tr_setup;
+		}
+		break;
+	}
+}
+
+static void
+ulpt_status_callback(struct usb2_xfer *xfer)
+{
+	struct ulpt_softc *sc = xfer->priv_sc;
+	struct usb2_device_request req;
+	uint8_t cur_status;
+	uint8_t new_status;
+
+	switch (USB_GET_STATE(xfer)) {
+	case USB_ST_TRANSFERRED:
+
+		usb2_copy_out(xfer->frbuffers + 1, 0, &cur_status, 1);
+
+		cur_status = (cur_status ^ LPS_INVERT) & LPS_MASK;
+		new_status = cur_status & ~sc->sc_last_status;
+		sc->sc_last_status = cur_status;
+
+		if (new_status & LPS_SELECT)
+			log(LOG_NOTICE, "%s: offline\n",
+			    device_get_nameunit(sc->sc_dev));
+		else if (new_status & LPS_NOPAPER)
+			log(LOG_NOTICE, "%s: out of paper\n",
+			    device_get_nameunit(sc->sc_dev));
+		else if (new_status & LPS_NERR)
+			log(LOG_NOTICE, "%s: output error\n",
+			    device_get_nameunit(sc->sc_dev));
+		break;
+
+	case USB_ST_SETUP:
+		req.bmRequestType = UT_READ_CLASS_INTERFACE;
+		req.bRequest = UR_GET_PORT_STATUS;
+		USETW(req.wValue, 0);
+		req.wIndex[0] = sc->sc_iface_no;
+		req.wIndex[1] = 0;
+		USETW(req.wLength, 1);
+
+		usb2_copy_in(xfer->frbuffers, 0, &req, sizeof(req));
+
+		xfer->frlengths[0] = sizeof(req);
+		xfer->frlengths[1] = 1;
+		xfer->nframes = 2;
+		usb2_start_hardware(xfer);
+		break;
+
+	default:			/* Error */
+		DPRINTF("error=%s\n", usb2_errstr(xfer->error));
+		if (xfer->error != USB_ERR_CANCELLED) {
+			/* wait for next watchdog timeout */
+		}
+		break;
+	}
+}
+
+static const struct usb2_config ulpt_config[ULPT_N_TRANSFER] = {
+	[ULPT_BULK_DT_WR] = {
+		.type = UE_BULK,
+		.endpoint = UE_ADDR_ANY,
+		.direction = UE_DIR_OUT,
+		.mh.bufsize = ULPT_BSIZE,
+		.mh.flags = {.pipe_bof = 1,.force_short_xfer = 1,.proxy_buffer = 1},
+		.mh.callback = &ulpt_write_callback,
+	},
+
+	[ULPT_BULK_DT_RD] = {
+		.type = UE_BULK,
+		.endpoint = UE_ADDR_ANY,
+		.direction = UE_DIR_IN,
+		.mh.bufsize = ULPT_BSIZE,
+		.mh.flags = {.pipe_bof = 1,.short_xfer_ok = 1,.proxy_buffer = 1},
+		.mh.callback = &ulpt_read_callback,
+	},
+
+	[ULPT_INTR_DT_RD] = {
+		.type = UE_CONTROL,
+		.endpoint = 0x00,	/* Control pipe */
+		.direction = UE_DIR_ANY,
+		.mh.bufsize = sizeof(struct usb2_device_request) + 1,
+		.mh.callback = &ulpt_status_callback,
+		.mh.timeout = 1000,	/* 1 second */
+	},
+};
+
+static void
+ulpt_start_read(struct usb2_fifo *fifo)
+{
+	struct ulpt_softc *sc = fifo->priv_sc0;
+
+	usb2_transfer_start(sc->sc_xfer[ULPT_BULK_DT_RD]);
+}
+
+static void
+ulpt_stop_read(struct usb2_fifo *fifo)
+{
+	struct ulpt_softc *sc = fifo->priv_sc0;
+
+	usb2_transfer_stop(sc->sc_xfer[ULPT_BULK_DT_RD]);
+}
+
+static void
+ulpt_start_write(struct usb2_fifo *fifo)
+{
+	struct ulpt_softc *sc = fifo->priv_sc0;
+
+	usb2_transfer_start(sc->sc_xfer[ULPT_BULK_DT_WR]);
+}
+
+static void
+ulpt_stop_write(struct usb2_fifo *fifo)
+{
+	struct ulpt_softc *sc = fifo->priv_sc0;
+
+	usb2_transfer_stop(sc->sc_xfer[ULPT_BULK_DT_WR]);
+}
+
+static int
+ulpt_open(struct usb2_fifo *fifo, int fflags, struct thread *td)
+{
+	struct ulpt_softc *sc = fifo->priv_sc0;
+
+	/* we assume that open is a serial process */
+
+	if (sc->sc_fflags == 0) {
+		ulpt_reset(sc);
+	}
+	return (unlpt_open(fifo, fflags, td));
+}
+
+static int
+unlpt_open(struct usb2_fifo *fifo, int fflags, struct thread *td)
+{
+	struct ulpt_softc *sc = fifo->priv_sc0;
+
+	if (sc->sc_fflags & fflags) {
+		return (EBUSY);
+	}
+	if (fflags & FREAD) {
+		/* clear stall first */
+		mtx_lock(&sc->sc_mtx);
+		usb2_transfer_set_stall(sc->sc_xfer[ULPT_BULK_DT_RD]);
+		mtx_unlock(&sc->sc_mtx);
+		if (usb2_fifo_alloc_buffer(fifo,
+		    sc->sc_xfer[ULPT_BULK_DT_RD]->max_data_length,
+		    ULPT_IFQ_MAXLEN)) {
+			return (ENOMEM);
+		}
+		/* set which FIFO is opened */
+		sc->sc_fifo_open[USB_FIFO_RX] = fifo;
+	}
+	if (fflags & FWRITE) {
+		/* clear stall first */
+		mtx_lock(&sc->sc_mtx);
+		usb2_transfer_set_stall(sc->sc_xfer[ULPT_BULK_DT_WR]);
+		mtx_unlock(&sc->sc_mtx);
+		if (usb2_fifo_alloc_buffer(fifo,
+		    sc->sc_xfer[ULPT_BULK_DT_WR]->max_data_length,
+		    ULPT_IFQ_MAXLEN)) {
+			return (ENOMEM);
+		}
+		/* set which FIFO is opened */
+		sc->sc_fifo_open[USB_FIFO_TX] = fifo;
+	}
+	sc->sc_fflags |= fflags & (FREAD | FWRITE);
+	return (0);
+}
+
+static void
+ulpt_close(struct usb2_fifo *fifo, int fflags, struct thread *td)
+{
+	struct ulpt_softc *sc = fifo->priv_sc0;
+
+	sc->sc_fflags &= ~(fflags & (FREAD | FWRITE));
+
+	if (fflags & (FREAD | FWRITE)) {
+		usb2_fifo_free_buffer(fifo);
+	}
+}
+
+static int
+ulpt_ioctl(struct usb2_fifo *fifo, u_long cmd, void *data,
+    int fflags, struct thread *td)
+{
+	return (ENODEV);
+}
+
+static int
+ulpt_probe(device_t dev)
+{
+	struct usb2_attach_arg *uaa = device_get_ivars(dev);
+
+	DPRINTFN(11, "\n");
+
+	if (uaa->usb2_mode != USB_MODE_HOST) {
+		return (ENXIO);
+	}
+	if ((uaa->info.bInterfaceClass == UICLASS_PRINTER) &&
+	    (uaa->info.bInterfaceSubClass == UISUBCLASS_PRINTER) &&
+	    ((uaa->info.bInterfaceProtocol == UIPROTO_PRINTER_UNI) ||
+	    (uaa->info.bInterfaceProtocol == UIPROTO_PRINTER_BI) ||
+	    (uaa->info.bInterfaceProtocol == UIPROTO_PRINTER_1284))) {
+		return (0);
+	}
+	return (ENXIO);
+}
+
+static int
+ulpt_attach(device_t dev)
+{
+	struct usb2_attach_arg *uaa = device_get_ivars(dev);
+	struct ulpt_softc *sc = device_get_softc(dev);
+	struct usb2_interface_descriptor *id;
+	int unit = device_get_unit(dev);
+	int error;
+	uint8_t iface_index = uaa->info.bIfaceIndex;
+	uint8_t alt_index;
+
+	DPRINTFN(11, "sc=%p\n", sc);
+
+	sc->sc_dev = dev;
+	sc->sc_udev = uaa->device;
+
+	device_set_usb2_desc(dev);
+
+	mtx_init(&sc->sc_mtx, "ulpt lock", NULL, MTX_DEF | MTX_RECURSE);
+
+	usb2_callout_init_mtx(&sc->sc_watchdog, &sc->sc_mtx, 0);
+
+	/* search through all the descriptors looking for bidir mode */
+
+	id = usb2_get_interface_descriptor(uaa->iface);
+	alt_index = 0 - 1;
+	while (1) {
+		if (id == NULL) {
+			break;
+		}
+		if ((id->bDescriptorType == UDESC_INTERFACE) &&
+		    (id->bLength >= sizeof(*id))) {
+			if (id->bInterfaceNumber != uaa->info.bIfaceNum) {
+				break;
+			} else {
+				alt_index++;
+				if ((id->bInterfaceClass == UICLASS_PRINTER) &&
+				    (id->bInterfaceSubClass == UISUBCLASS_PRINTER) &&
+				    (id->bInterfaceProtocol == UIPROTO_PRINTER_BI)) {
+					goto found;
+				}
+			}
+		}
+		id = (void *)usb2_desc_foreach(
+		    usb2_get_config_descriptor(uaa->device), (void *)id);
+	}
+	goto detach;
+
+found:
+
+	DPRINTF("setting alternate "
+	    "config number: %d\n", alt_index);
+
+	if (alt_index) {
+
+		error = usb2_set_alt_interface_index
+		    (uaa->device, iface_index, alt_index);
+
+		if (error) {
+			DPRINTF("could not set alternate "
+			    "config, error=%s\n", usb2_errstr(error));
+			goto detach;
+		}
+	}
+	sc->sc_iface_no = id->bInterfaceNumber;
+
+	error = usb2_transfer_setup(uaa->device, &iface_index,
+	    sc->sc_xfer, ulpt_config, ULPT_N_TRANSFER,
+	    sc, &sc->sc_mtx);
+	if (error) {
+		DPRINTF("error=%s\n", usb2_errstr(error));
+		goto detach;
+	}
+	device_printf(sc->sc_dev, "using bi-directional mode\n");
+
+#if 0
+/*
+ * This code is disabled because for some mysterious reason it causes
+ * printing not to work.  But only sometimes, and mostly with
+ * UHCI and less often with OHCI.  *sigh*
+ */
+	{
+		struct usb2_config_descriptor *cd = usb2_get_config_descriptor(dev);
+		struct usb2_device_request req;
+		int len, alen;
+
+		req.bmRequestType = UT_READ_CLASS_INTERFACE;
+		req.bRequest = UR_GET_DEVICE_ID;
+		USETW(req.wValue, cd->bConfigurationValue);
+		USETW2(req.wIndex, id->bInterfaceNumber, id->bAlternateSetting);
+		USETW(req.wLength, sizeof devinfo - 1);
+		error = usb2_do_request_flags(dev, &req, devinfo, USB_SHORT_XFER_OK,
+		    &alen, USB_DEFAULT_TIMEOUT);
+		if (error) {
+			device_printf(sc->sc_dev, "cannot get device id\n");
+		} else if (alen <= 2) {
+			device_printf(sc->sc_dev, "empty device id, no "
+			    "printer connected?\n");
+		} else {
+			/* devinfo now contains an IEEE-1284 device ID */
+			len = ((devinfo[0] & 0xff) << 8) | (devinfo[1] & 0xff);
+			if (len > sizeof devinfo - 3)
+				len = sizeof devinfo - 3;
+			devinfo[len] = 0;
+			printf("%s: device id <", device_get_nameunit(sc->sc_dev));
+			ieee1284_print_id(devinfo + 2);
+			printf(">\n");
+		}
+	}
+#endif
+
+	/* set interface permissions */
+	usb2_set_iface_perm(uaa->device, uaa->info.bIfaceIndex,
+	    UID_ROOT, GID_OPERATOR, 0644);
+
+	error = usb2_fifo_attach(uaa->device, sc, &sc->sc_mtx,
+	    &ulpt_fifo_methods, &sc->sc_fifo,
+	    unit, 0 - 1, uaa->info.bIfaceIndex);
+	if (error) {
+		goto detach;
+	}
+	error = usb2_fifo_attach(uaa->device, sc, &sc->sc_mtx,
+	    &unlpt_fifo_methods, &sc->sc_fifo_noreset,
+	    unit, 0 - 1, uaa->info.bIfaceIndex);
+	if (error) {
+		goto detach;
+	}
+	/* start reading of status */
+
+	mtx_lock(&sc->sc_mtx);
+	ulpt_watchdog(sc);
+	mtx_unlock(&sc->sc_mtx);
+	return (0);
+
+detach:
+	ulpt_detach(dev);
+	return (ENOMEM);
+}
+
+static int
+ulpt_detach(device_t dev)
+{
+	struct ulpt_softc *sc = device_get_softc(dev);
+
+	DPRINTF("sc=%p\n", sc);
+
+	usb2_fifo_detach(&sc->sc_fifo);
+	usb2_fifo_detach(&sc->sc_fifo_noreset);
+
+	mtx_lock(&sc->sc_mtx);
+	usb2_callout_stop(&sc->sc_watchdog);
+	mtx_unlock(&sc->sc_mtx);
+
+	usb2_transfer_unsetup(sc->sc_xfer, ULPT_N_TRANSFER);
+
+	usb2_callout_drain(&sc->sc_watchdog);
+
+	mtx_destroy(&sc->sc_mtx);
+
+	return (0);
+}
+
+#if 0
+/* XXX This does not belong here. */
+
+/*
+ * Compare two strings until the second ends.
+ */
+
+static uint8_t
+ieee1284_compare(const char *a, const char *b)
+{
+	while (1) {
+
+		if (*b == 0) {
+			break;
+		}
+		if (*a != *b) {
+			return 1;
+		}
+		b++;
+		a++;
+	}
+	return 0;
+}
+
+/*
+ * Print select parts of an IEEE 1284 device ID.
+ */
+void
+ieee1284_print_id(char *str)
+{
+	char *p, *q;
+
+	for (p = str - 1; p; p = strchr(p, ';')) {
+		p++;			/* skip ';' */
+		if (ieee1284_compare(p, "MFG:") == 0 ||
+		    ieee1284_compare(p, "MANUFACTURER:") == 0 ||
+		    ieee1284_compare(p, "MDL:") == 0 ||
+		    ieee1284_compare(p, "MODEL:") == 0) {
+			q = strchr(p, ';');
+			if (q)
+				printf("%.*s", (int)(q - p + 1), p);
+		}
+	}
+}
+
+#endif
+
+static void
+ulpt_watchdog(void *arg)
+{
+	struct ulpt_softc *sc = arg;
+
+	mtx_assert(&sc->sc_mtx, MA_OWNED);
+
+	usb2_transfer_start(sc->sc_xfer[ULPT_INTR_DT_RD]);
+
+	usb2_callout_reset(&sc->sc_watchdog,
+	    hz, &ulpt_watchdog, sc);
+}
+
+static devclass_t ulpt_devclass;
+
+static device_method_t ulpt_methods[] = {
+	DEVMETHOD(device_probe, ulpt_probe),
+	DEVMETHOD(device_attach, ulpt_attach),
+	DEVMETHOD(device_detach, ulpt_detach),
+	{0, 0}
+};
+
+static driver_t ulpt_driver = {
+	.name = "ulpt",
+	.methods = ulpt_methods,
+	.size = sizeof(struct ulpt_softc),
+};
+
+DRIVER_MODULE(ulpt, ushub, ulpt_driver, ulpt_devclass, NULL, 0);
+MODULE_DEPEND(ulpt, usb, 1, 1, 1);
+MODULE_DEPEND(ulpt, ucom, 1, 1, 1);