AMD64 - Refactor uio_resid and size_t assumptions.

[dragonfly.git] / sys / dev / usbmisc / ulpt / ulpt.c

/*
 * $NetBSD: ulpt.c,v 1.55 2002/10/23 09:14:01 jdolecek Exp $
 * $FreeBSD: src/sys/dev/usb/ulpt.c,v 1.59 2003/09/28 20:48:13 phk Exp $
 * $DragonFly: src/sys/dev/usbmisc/ulpt/ulpt.c,v 1.25 2008/02/11 16:56:53 dillon Exp $
 */

/*
 * Copyright (c) 1998 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
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <sys/uio.h>
#include <sys/conf.h>
#include <sys/device.h>
#include <sys/syslog.h>
#include <sys/sysctl.h>
#include <sys/thread2.h>

#include <bus/usb/usb.h>
#include <bus/usb/usbdi.h>
#include <bus/usb/usbdi_util.h>
#include <bus/usb/usb_quirks.h>

#define	TIMEOUT		hz*16	/* wait up to 16 seconds for a ready */
#define	STEP		hz/4

#define	ULPT_BSIZE	16384

#ifdef USB_DEBUG
#define DPRINTF(x)	if (ulptdebug) kprintf x
#define DPRINTFN(n,x)	if (ulptdebug>(n)) kprintf x
int	ulptdebug = 0;
SYSCTL_NODE(_hw_usb, OID_AUTO, ulpt, CTLFLAG_RW, 0, "USB ulpt");
SYSCTL_INT(_hw_usb_ulpt, OID_AUTO, debug, CTLFLAG_RW,
	   &ulptdebug, 0, "ulpt debug level");
#else
#define DPRINTF(x)
#define DPRINTFN(n,x)
#endif

#define UR_GET_DEVICE_ID 0
#define UR_GET_PORT_STATUS 1
#define UR_SOFT_RESET 2

#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)

struct ulpt_softc {
	device_t sc_dev;
	usbd_device_handle sc_udev;	/* device */
	usbd_interface_handle sc_iface;	/* interface */
	int sc_ifaceno;

	int sc_out;
	usbd_pipe_handle sc_out_pipe;	/* bulk out pipe */

	int sc_in;
	usbd_pipe_handle sc_in_pipe;	/* bulk in pipe */
	usbd_xfer_handle sc_in_xfer1;
	usbd_xfer_handle sc_in_xfer2;
	u_char sc_junk[64];	/* somewhere to dump input */

	u_char sc_state;
#define	ULPT_OPEN	0x01	/* device is open */
#define	ULPT_OBUSY	0x02	/* printer is busy doing output */
#define	ULPT_INIT	0x04	/* waiting to initialize for open */
	u_char sc_flags;
#define	ULPT_NOPRIME	0x40	/* don't prime on open */
	u_char sc_laststatus;

	int sc_refcnt;
	u_char sc_dying;
	int vendor;
	int product;
};

static d_open_t ulptopen;
static d_close_t ulptclose;
static d_write_t ulptwrite;
static d_ioctl_t ulptioctl;

#define ULPT_CDEV_MAJOR 113

static struct dev_ops ulpt_ops = {
	{ "ulpt", ULPT_CDEV_MAJOR, 0 },
	.d_open =	ulptopen,
	.d_close =	ulptclose,
	.d_write =	ulptwrite,
	.d_ioctl =	ulptioctl,
};

void ulpt_disco(void *);

int ulpt_do_write(struct ulpt_softc *, struct uio *uio, int);
int ulpt_status(struct ulpt_softc *);
void ulpt_reset(struct ulpt_softc *);
int ulpt_statusmsg(u_char, struct ulpt_softc *);

#if 0
void ieee1284_print_id(char *);
#endif

#define	ULPTUNIT(s)	(minor(s) & 0x1f)
#define	ULPTFLAGS(s)	(minor(s) & 0xe0)


static device_probe_t ulpt_match;
static device_attach_t ulpt_attach;
static device_detach_t ulpt_detach;

static devclass_t ulpt_devclass;

static kobj_method_t ulpt_methods[] = {
	DEVMETHOD(device_probe, ulpt_match),
	DEVMETHOD(device_attach, ulpt_attach),
	DEVMETHOD(device_detach, ulpt_detach),
	{0,0}
};

static driver_t ulpt_driver = {
	"ulpt",
	ulpt_methods,
	sizeof(struct ulpt_softc)
};

MODULE_DEPEND(ulpt, usb, 1, 1, 1);

static int
ulpt_match(device_t self)
{
	struct usb_attach_arg *uaa = device_get_ivars(self);
	usb_interface_descriptor_t *id;

	DPRINTFN(10,("ulpt_match\n"));
	if (uaa->iface == NULL)
		return (UMATCH_NONE);
	id = usbd_get_interface_descriptor(uaa->iface);
	if (id != NULL &&
	    id->bInterfaceClass == UICLASS_PRINTER &&
	    id->bInterfaceSubClass == UISUBCLASS_PRINTER &&
	    (id->bInterfaceProtocol == UIPROTO_PRINTER_UNI ||
	     id->bInterfaceProtocol == UIPROTO_PRINTER_BI ||
	     id->bInterfaceProtocol == UIPROTO_PRINTER_1284))
		return (UMATCH_IFACECLASS_IFACESUBCLASS_IFACEPROTO);
	return (UMATCH_NONE);
}

static int
ulpt_attach(device_t self)
{
	struct ulpt_softc *sc = device_get_softc(self);
	struct usb_attach_arg *uaa = device_get_ivars(self);
	usbd_device_handle dev = uaa->device;
	usbd_interface_handle iface = uaa->iface;
	usb_interface_descriptor_t *ifcd = usbd_get_interface_descriptor(iface);
	usb_interface_descriptor_t *id, *iend;
	usb_config_descriptor_t *cdesc;
	usbd_status err;
	usb_endpoint_descriptor_t *ed;
	u_int8_t epcount;
	int i, altno;

	DPRINTFN(10,("ulpt_attach: sc=%p\n", sc));
	sc->sc_dev = self;

	/* XXX
	 * Stepping through the alternate settings needs to be abstracted out.
	 */
	cdesc = usbd_get_config_descriptor(dev);
	if (cdesc == NULL) {
		kprintf("%s: failed to get configuration descriptor\n",
		       device_get_nameunit(sc->sc_dev));
		return ENXIO;
	}
	iend = (usb_interface_descriptor_t *)
		   ((char *)cdesc + UGETW(cdesc->wTotalLength));
#ifdef DIAGNOSTIC
	if (ifcd < (usb_interface_descriptor_t *)cdesc ||
	    ifcd >= iend)
		panic("ulpt: iface desc out of range");
#endif
	/* Step through all the descriptors looking for bidir mode */
	for (id = ifcd, altno = 0;
	     id < iend;
	     id = (void *)((char *)id + id->bLength)) {
		if (id->bDescriptorType == UDESC_INTERFACE &&
		    id->bInterfaceNumber == ifcd->bInterfaceNumber) {
			if (id->bInterfaceClass == UICLASS_PRINTER &&
			    id->bInterfaceSubClass == UISUBCLASS_PRINTER &&
			    (id->bInterfaceProtocol == UIPROTO_PRINTER_BI /* ||
			     id->bInterfaceProtocol == UIPROTO_PRINTER_1284 */))
				goto found;
			altno++;
		}
	}
	id = ifcd;		/* not found, use original */
 found:
	if (id != ifcd) {
		/* Found a new bidir setting */
		DPRINTF(("ulpt_attach: set altno = %d\n", altno));
		err = usbd_set_interface(iface, altno);
		if (err) {
			kprintf("%s: setting alternate interface failed\n",
			       device_get_nameunit(sc->sc_dev));
			sc->sc_dying = 1;
			return ENXIO;
		}
	}

	epcount = 0;
	(void)usbd_endpoint_count(iface, &epcount);

	sc->sc_in = -1;
	sc->sc_out = -1;
	sc->vendor = uaa->vendor;
	sc->product = uaa->product;
	for (i = 0; i < epcount; i++) {
		ed = usbd_interface2endpoint_descriptor(iface, i);
		if (ed == NULL) {
			kprintf("%s: couldn't get ep %d\n",
			    device_get_nameunit(sc->sc_dev), i);
			return ENXIO;
		}
		if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN &&
		    UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) {
			sc->sc_in = ed->bEndpointAddress;
		} else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT &&
			   UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) {
			sc->sc_out = ed->bEndpointAddress;
		}
	}
	if (sc->sc_out == -1) {
		kprintf("%s: could not find bulk out endpoint\n",
		    device_get_nameunit(sc->sc_dev));
		sc->sc_dying = 1;
		return ENXIO;
	}

	if (usbd_get_quirks(dev)->uq_flags & UQ_BROKEN_BIDIR) {
		/* This device doesn't handle reading properly. */
		sc->sc_in = -1;
	}

	kprintf("%s: using %s-directional mode\n", device_get_nameunit(sc->sc_dev),
	       sc->sc_in >= 0 ? "bi" : "uni");

	DPRINTFN(10, ("ulpt_attach: bulk=%d\n", sc->sc_out));

	sc->sc_iface = iface;
	sc->sc_ifaceno = id->bInterfaceNumber;
	sc->sc_udev = dev;

	make_dev(&ulpt_ops, device_get_unit(self),
		 UID_ROOT, GID_OPERATOR, 0644,
		 "ulpt%d", device_get_unit(self));
	make_dev(&ulpt_ops,
		 device_get_unit(self)|ULPT_NOPRIME,
		 UID_ROOT, GID_OPERATOR, 0644,
		 "unlpt%d", device_get_unit(self));

	usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->sc_udev,
			   sc->sc_dev);

	return 0;
}

static int
ulpt_detach(device_t self)
{
	struct ulpt_softc *sc = device_get_softc(self);

	DPRINTF(("ulpt_detach: sc=%p\n", sc));

	sc->sc_dying = 1;
	if (sc->sc_out_pipe != NULL)
		usbd_abort_pipe(sc->sc_out_pipe);
	if (sc->sc_in_pipe != NULL)
		usbd_abort_pipe(sc->sc_in_pipe);

	/*
	 * Wait for any ongoing operations to complete before we actually
	 * close things down.
	 */

	crit_enter();
	--sc->sc_refcnt;
	if (sc->sc_refcnt >= 0) {
		kprintf("%s: waiting for idle\n", device_get_nameunit(sc->sc_dev));
		while (sc->sc_refcnt >= 0)
			usb_detach_wait(sc->sc_dev);
		kprintf("%s: idle wait done\n", device_get_nameunit(sc->sc_dev));
	}
	crit_exit();

	dev_ops_remove_minor(&ulpt_ops, /*-1, */device_get_unit(self));

	usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_udev,
			   sc->sc_dev);

	return (0);
}

int
ulpt_status(struct ulpt_softc *sc)
{
	usb_device_request_t req;
	usbd_status err;
	u_char status;

	req.bmRequestType = UT_READ_CLASS_INTERFACE;
	req.bRequest = UR_GET_PORT_STATUS;
	USETW(req.wValue, 0);
	USETW(req.wIndex, sc->sc_ifaceno);
	USETW(req.wLength, 1);
	err = usbd_do_request(sc->sc_udev, &req, &status);
	DPRINTFN(1, ("ulpt_status: status=0x%02x err=%d\n", status, err));
	if (!err)
		return (status);
	else
		return (0);
}

void
ulpt_reset(struct ulpt_softc *sc)
{
	usb_device_request_t req;
	int other_fails;

	/* The Brother HL1240 doesn't handle UT_WRITE_CLASS_OTHER */
	other_fails = (sc->vendor == 0x04f9 && sc->product == 0x0006);

	DPRINTFN(1, ("ulpt_reset\n"));
	req.bRequest = UR_SOFT_RESET;
	USETW(req.wValue, 0);
	USETW(req.wIndex, sc->sc_ifaceno);
	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.
	 */
	req.bmRequestType = UT_WRITE_CLASS_OTHER;
	/* Some printers don't handle UT_WRITE_CLASS_OTHER */
	if (other_fails || usbd_do_request(sc->sc_udev, &req, 0)) {/* 1.0 */
		req.bmRequestType = UT_WRITE_CLASS_INTERFACE;
		(void)usbd_do_request(sc->sc_udev, &req, 0); /* 1.1 */
	}
}

static void
ulpt_input(usbd_xfer_handle xfer, usbd_private_handle priv, usbd_status status)
{
	struct ulpt_softc *sc = priv;
	u_int32_t count;

	/* Don't loop on errors or 0-length input. */
	usbd_get_xfer_status(xfer, NULL, NULL, &count, NULL);
	if (status != USBD_NORMAL_COMPLETION || count == 0)
		return;

	DPRINTFN(2,("ulpt_input: got some data\n"));
	/* Do it again. */
	if (xfer == sc->sc_in_xfer1)
		usbd_transfer(sc->sc_in_xfer2);
	else
		usbd_transfer(sc->sc_in_xfer1);
}

int ulptusein = 1;

/*
 * Reset the printer, then wait until it's selected and not busy.
 */
int
ulptopen(struct dev_open_args *ap)
{
	cdev_t dev = ap->a_head.a_dev;
	u_char flags = ULPTFLAGS(dev);
	struct ulpt_softc *sc;
	usbd_status err;
	int spin, error;

	sc = devclass_get_softc(ulpt_devclass, ULPTUNIT(dev));
	if (sc == NULL)
		return (ENXIO);

	if (sc == NULL || sc->sc_iface == NULL || sc->sc_dying)
		return (ENXIO);

	if (sc->sc_state)
		return (EBUSY);

	sc->sc_state = ULPT_INIT;
	sc->sc_flags = flags;
	DPRINTF(("ulptopen: flags=0x%x\n", (unsigned)flags));

#if defined(USB_DEBUG)
	/* Ignoring these flags might not be a good idea */
	if ((flags & ~ULPT_NOPRIME) != 0)
		kprintf("ulptopen: flags ignored: %b\n", flags,
			"\20\3POS_INIT\4POS_ACK\6PRIME_OPEN\7AUTOLF\10BYPASS");
#endif

	error = 0;
	sc->sc_refcnt++;

	if ((flags & ULPT_NOPRIME) == 0) {
		ulpt_reset(sc);
		if (sc->sc_dying) {
			error = ENXIO;
			sc->sc_state = 0;
			goto done;
		}
	}

	for (spin = 0; (ulpt_status(sc) & LPS_SELECT) == 0; spin += STEP) {
		DPRINTF(("ulpt_open: waiting a while\n"));
		if (spin >= TIMEOUT) {
			error = EBUSY;
			sc->sc_state = 0;
			goto done;
		}

		/* wait 1/4 second, give up if we get a signal */
		error = tsleep((caddr_t)sc, PCATCH, "ulptop", STEP);
		if (error != EWOULDBLOCK) {
			sc->sc_state = 0;
			goto done;
		}

		if (sc->sc_dying) {
			error = ENXIO;
			sc->sc_state = 0;
			goto done;
		}
	}

	err = usbd_open_pipe(sc->sc_iface, sc->sc_out, 0, &sc->sc_out_pipe);
	if (err) {
		sc->sc_state = 0;
		error = EIO;
		goto done;
	}

	if (ulptusein && sc->sc_in != -1) {
		DPRINTF(("ulpt_open: open input pipe\n"));
		err = usbd_open_pipe(sc->sc_iface, sc->sc_in,0,&sc->sc_in_pipe);
		if (err) {
			error = EIO;
			usbd_close_pipe(sc->sc_out_pipe);
			sc->sc_out_pipe = NULL;
			sc->sc_state = 0;
			goto done;
		}
		sc->sc_in_xfer1 = usbd_alloc_xfer(sc->sc_udev);
		sc->sc_in_xfer2 = usbd_alloc_xfer(sc->sc_udev);
		if (sc->sc_in_xfer1 == NULL || sc->sc_in_xfer2 == NULL) {
			error = ENOMEM;
			if (sc->sc_in_xfer1 != NULL) {
				usbd_free_xfer(sc->sc_in_xfer1);
				sc->sc_in_xfer1 = NULL;
			}
			if (sc->sc_in_xfer2 != NULL) {
				usbd_free_xfer(sc->sc_in_xfer2);
				sc->sc_in_xfer2 = NULL;
			}
			usbd_close_pipe(sc->sc_out_pipe);
			sc->sc_out_pipe = NULL;
			usbd_close_pipe(sc->sc_in_pipe);
			sc->sc_in_pipe = NULL;
			sc->sc_state = 0;
			goto done;
		}
		usbd_setup_xfer(sc->sc_in_xfer1, sc->sc_in_pipe, sc,
		    sc->sc_junk, sizeof sc->sc_junk, USBD_SHORT_XFER_OK,
		    USBD_NO_TIMEOUT, ulpt_input);
		usbd_setup_xfer(sc->sc_in_xfer2, sc->sc_in_pipe, sc,
		    sc->sc_junk, sizeof sc->sc_junk, USBD_SHORT_XFER_OK,
		    USBD_NO_TIMEOUT, ulpt_input);
		usbd_transfer(sc->sc_in_xfer1); /* ignore failed start */
	}

	sc->sc_state = ULPT_OPEN;

done:
	if (--sc->sc_refcnt < 0)
		usb_detach_wakeup(sc->sc_dev);

	DPRINTF(("ulptopen: done, error=%d\n", error));
	return (error);
}

int
ulpt_statusmsg(u_char status, struct ulpt_softc *sc)
{
	u_char new;

	status = (status ^ LPS_INVERT) & LPS_MASK;
	new = status & ~sc->sc_laststatus;
	sc->sc_laststatus = status;

	if (new & LPS_SELECT)
		log(LOG_NOTICE, "%s: offline\n", device_get_nameunit(sc->sc_dev));
	else if (new & LPS_NOPAPER)
		log(LOG_NOTICE, "%s: out of paper\n", device_get_nameunit(sc->sc_dev));
	else if (new & LPS_NERR)
		log(LOG_NOTICE, "%s: output error\n", device_get_nameunit(sc->sc_dev));

	return (status);
}

int
ulptclose(struct dev_close_args *ap)
{
	cdev_t dev = ap->a_head.a_dev;
	struct ulpt_softc *sc;

	sc = devclass_get_softc(ulpt_devclass, ULPTUNIT(dev));

	if (sc->sc_state != ULPT_OPEN)
		/* We are being forced to close before the open completed. */
		return (0);

	if (sc->sc_out_pipe != NULL) {
		usbd_close_pipe(sc->sc_out_pipe);
		sc->sc_out_pipe = NULL;
	}
	if (sc->sc_in_pipe != NULL) {
		usbd_abort_pipe(sc->sc_in_pipe);
		usbd_close_pipe(sc->sc_in_pipe);
		sc->sc_in_pipe = NULL;
		if (sc->sc_in_xfer1 != NULL) {
			usbd_free_xfer(sc->sc_in_xfer1);
			sc->sc_in_xfer1 = NULL;
		}
		if (sc->sc_in_xfer2 != NULL) {
			usbd_free_xfer(sc->sc_in_xfer2);
			sc->sc_in_xfer2 = NULL;
		}
	}

	sc->sc_state = 0;

	DPRINTF(("ulptclose: closed\n"));
	return (0);
}

int
ulpt_do_write(struct ulpt_softc *sc, struct uio *uio, int flags)
{
	u_int32_t n;
	int error = 0;
	void *bufp;
	usbd_xfer_handle xfer;
	usbd_status err;

	DPRINTF(("ulptwrite\n"));
	xfer = usbd_alloc_xfer(sc->sc_udev);
	if (xfer == NULL)
		return (ENOMEM);
	bufp = usbd_alloc_buffer(xfer, ULPT_BSIZE);
	if (bufp == NULL) {
		usbd_free_xfer(xfer);
		return (ENOMEM);
	}
	while ((n = szmin(ULPT_BSIZE, uio->uio_resid)) != 0) {
		ulpt_statusmsg(ulpt_status(sc), sc);
		error = uiomove(bufp, n, uio);
		if (error)
			break;
		DPRINTFN(1, ("ulptwrite: transfer %d bytes\n", n));
		err = usbd_bulk_transfer(xfer, sc->sc_out_pipe, USBD_NO_COPY,
			  USBD_NO_TIMEOUT, bufp, &n, "ulptwr");
		if (err) {
			DPRINTF(("ulptwrite: error=%d\n", err));
			error = EIO;
			break;
		}
	}
	usbd_free_xfer(xfer);

	return (error);
}

int
ulptwrite(struct dev_write_args *ap)
{
	cdev_t dev = ap->a_head.a_dev;
	struct ulpt_softc *sc;
	int error;

	sc = devclass_get_softc(ulpt_devclass, ULPTUNIT(dev));

	if (sc->sc_dying)
		return (EIO);

	sc->sc_refcnt++;
	error = ulpt_do_write(sc, ap->a_uio, ap->a_ioflag);
	if (--sc->sc_refcnt < 0)
		usb_detach_wakeup(sc->sc_dev);
	return (error);
}

int
ulptioctl(struct dev_ioctl_args *ap)
{
	int error = 0;

	switch (ap->a_cmd) {
	default:
		error = ENODEV;
	}

	return (error);
}

#if 0
/* XXX This does not belong here. */
/*
 * 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 (strncmp(p, "MFG:", 4) == 0 ||
		    strncmp(p, "MANUFACTURER:", 14) == 0 ||
		    strncmp(p, "MDL:", 4) == 0 ||
		    strncmp(p, "MODEL:", 6) == 0) {
			q = strchr(p, ';');
			if (q)
				kprintf("%.*s", (int)(q - p + 1), p);
		}
	}
}
#endif

DRIVER_MODULE(ulpt, uhub, ulpt_driver, ulpt_devclass, usbd_driver_load, 0);