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ucom.c revision 1.70.14.2
      1  1.70.14.2     joerg /*	$NetBSD: ucom.c,v 1.70.14.2 2007/11/14 19:04:36 joerg Exp $	*/
      2        1.1  augustss 
      3        1.1  augustss /*
      4       1.22  augustss  * Copyright (c) 1998, 2000 The NetBSD Foundation, Inc.
      5        1.1  augustss  * All rights reserved.
      6        1.1  augustss  *
      7        1.1  augustss  * This code is derived from software contributed to The NetBSD Foundation
      8       1.23  augustss  * by Lennart Augustsson (lennart (at) augustsson.net) at
      9        1.1  augustss  * Carlstedt Research & Technology.
     10        1.1  augustss  *
     11        1.1  augustss  * Redistribution and use in source and binary forms, with or without
     12        1.1  augustss  * modification, are permitted provided that the following conditions
     13        1.1  augustss  * are met:
     14        1.1  augustss  * 1. Redistributions of source code must retain the above copyright
     15        1.1  augustss  *    notice, this list of conditions and the following disclaimer.
     16        1.1  augustss  * 2. Redistributions in binary form must reproduce the above copyright
     17        1.1  augustss  *    notice, this list of conditions and the following disclaimer in the
     18        1.1  augustss  *    documentation and/or other materials provided with the distribution.
     19        1.1  augustss  * 3. All advertising materials mentioning features or use of this software
     20        1.1  augustss  *    must display the following acknowledgement:
     21        1.1  augustss  *        This product includes software developed by the NetBSD
     22        1.1  augustss  *        Foundation, Inc. and its contributors.
     23        1.1  augustss  * 4. Neither the name of The NetBSD Foundation nor the names of its
     24        1.1  augustss  *    contributors may be used to endorse or promote products derived
     25        1.1  augustss  *    from this software without specific prior written permission.
     26        1.1  augustss  *
     27        1.1  augustss  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     28        1.1  augustss  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     29        1.1  augustss  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     30        1.1  augustss  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     31        1.1  augustss  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     32        1.1  augustss  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     33        1.1  augustss  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     34        1.1  augustss  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     35        1.1  augustss  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     36        1.1  augustss  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     37        1.1  augustss  * POSSIBILITY OF SUCH DAMAGE.
     38        1.1  augustss  */
     39       1.22  augustss /*
     40       1.22  augustss  * This code is very heavily based on the 16550 driver, com.c.
     41       1.22  augustss  */
     42       1.40     lukem 
     43       1.40     lukem #include <sys/cdefs.h>
     44  1.70.14.2     joerg __KERNEL_RCSID(0, "$NetBSD: ucom.c,v 1.70.14.2 2007/11/14 19:04:36 joerg Exp $");
     45        1.1  augustss 
     46        1.1  augustss #include <sys/param.h>
     47        1.1  augustss #include <sys/systm.h>
     48        1.1  augustss #include <sys/kernel.h>
     49        1.1  augustss #include <sys/ioctl.h>
     50        1.3  augustss #include <sys/conf.h>
     51        1.1  augustss #include <sys/tty.h>
     52        1.1  augustss #include <sys/file.h>
     53        1.1  augustss #include <sys/select.h>
     54        1.1  augustss #include <sys/proc.h>
     55        1.1  augustss #include <sys/vnode.h>
     56       1.12  augustss #include <sys/device.h>
     57        1.1  augustss #include <sys/poll.h>
     58       1.63      elad #include <sys/kauth.h>
     59       1.31  explorer #if defined(__NetBSD__)
     60       1.31  explorer #include "rnd.h"
     61       1.31  explorer #if NRND > 0
     62       1.31  explorer #include <sys/rnd.h>
     63       1.31  explorer #endif
     64       1.31  explorer #endif
     65        1.1  augustss 
     66        1.1  augustss #include <dev/usb/usb.h>
     67        1.1  augustss 
     68        1.1  augustss #include <dev/usb/usbdi.h>
     69        1.1  augustss #include <dev/usb/usbdi_util.h>
     70        1.1  augustss #include <dev/usb/usbdevs.h>
     71        1.1  augustss #include <dev/usb/usb_quirks.h>
     72        1.1  augustss 
     73       1.12  augustss #include <dev/usb/ucomvar.h>
     74       1.12  augustss 
     75       1.13  augustss #include "ucom.h"
     76       1.13  augustss 
     77       1.53  drochner #include "locators.h"
     78       1.53  drochner 
     79       1.13  augustss #if NUCOM > 0
     80       1.13  augustss 
     81       1.12  augustss #ifdef UCOM_DEBUG
     82       1.12  augustss #define DPRINTFN(n, x)	if (ucomdebug > (n)) logprintf x
     83       1.12  augustss int ucomdebug = 0;
     84        1.1  augustss #else
     85       1.12  augustss #define DPRINTFN(n, x)
     86        1.1  augustss #endif
     87       1.12  augustss #define DPRINTF(x) DPRINTFN(0, x)
     88       1.12  augustss 
     89       1.12  augustss #define	UCOMUNIT_MASK		0x3ffff
     90       1.12  augustss #define	UCOMDIALOUT_MASK	0x80000
     91       1.12  augustss #define	UCOMCALLUNIT_MASK	0x40000
     92       1.12  augustss 
     93       1.12  augustss #define	UCOMUNIT(x)		(minor(x) & UCOMUNIT_MASK)
     94       1.12  augustss #define	UCOMDIALOUT(x)		(minor(x) & UCOMDIALOUT_MASK)
     95       1.12  augustss #define	UCOMCALLUNIT(x)		(minor(x) & UCOMCALLUNIT_MASK)
     96       1.12  augustss 
     97        1.1  augustss struct ucom_softc {
     98       1.12  augustss 	USBBASEDEVICE		sc_dev;		/* base device */
     99       1.12  augustss 
    100       1.12  augustss 	usbd_device_handle	sc_udev;	/* USB device */
    101       1.12  augustss 
    102       1.12  augustss 	usbd_interface_handle	sc_iface;	/* data interface */
    103       1.12  augustss 
    104       1.12  augustss 	int			sc_bulkin_no;	/* bulk in endpoint address */
    105       1.12  augustss 	usbd_pipe_handle	sc_bulkin_pipe;	/* bulk in pipe */
    106       1.12  augustss 	usbd_xfer_handle	sc_ixfer;	/* read request */
    107       1.12  augustss 	u_char			*sc_ibuf;	/* read buffer */
    108       1.19  augustss 	u_int			sc_ibufsize;	/* read buffer size */
    109       1.22  augustss 	u_int			sc_ibufsizepad;	/* read buffer size padded */
    110       1.12  augustss 
    111       1.12  augustss 	int			sc_bulkout_no;	/* bulk out endpoint address */
    112       1.12  augustss 	usbd_pipe_handle	sc_bulkout_pipe;/* bulk out pipe */
    113       1.12  augustss 	usbd_xfer_handle	sc_oxfer;	/* write request */
    114       1.12  augustss 	u_char			*sc_obuf;	/* write buffer */
    115       1.19  augustss 	u_int			sc_obufsize;	/* write buffer size */
    116       1.25  augustss 	u_int			sc_opkthdrlen;	/* header length of
    117       1.25  augustss 						 * output packet */
    118       1.12  augustss 
    119       1.12  augustss 	struct ucom_methods     *sc_methods;
    120       1.12  augustss 	void                    *sc_parent;
    121       1.12  augustss 	int			sc_portno;
    122       1.12  augustss 
    123       1.12  augustss 	struct tty		*sc_tty;	/* our tty */
    124       1.12  augustss 	u_char			sc_lsr;
    125       1.12  augustss 	u_char			sc_msr;
    126       1.12  augustss 	u_char			sc_mcr;
    127       1.12  augustss 	u_char			sc_tx_stopped;
    128       1.12  augustss 	int			sc_swflags;
    129       1.12  augustss 
    130       1.12  augustss 	u_char			sc_opening;	/* lock during open */
    131       1.17  augustss 	int			sc_refcnt;
    132       1.12  augustss 	u_char			sc_dying;	/* disconnecting */
    133       1.31  explorer 
    134       1.31  explorer #if defined(__NetBSD__) && NRND > 0
    135       1.31  explorer 	rndsource_element_t	sc_rndsource;	/* random source */
    136       1.31  explorer #endif
    137        1.1  augustss };
    138        1.1  augustss 
    139       1.44   gehenna dev_type_open(ucomopen);
    140       1.44   gehenna dev_type_close(ucomclose);
    141       1.44   gehenna dev_type_read(ucomread);
    142       1.44   gehenna dev_type_write(ucomwrite);
    143       1.44   gehenna dev_type_ioctl(ucomioctl);
    144       1.44   gehenna dev_type_stop(ucomstop);
    145       1.44   gehenna dev_type_tty(ucomtty);
    146       1.44   gehenna dev_type_poll(ucompoll);
    147       1.44   gehenna 
    148       1.44   gehenna const struct cdevsw ucom_cdevsw = {
    149       1.44   gehenna 	ucomopen, ucomclose, ucomread, ucomwrite, ucomioctl,
    150       1.47  jdolecek 	ucomstop, ucomtty, ucompoll, nommap, ttykqfilter, D_TTY
    151       1.44   gehenna };
    152       1.12  augustss 
    153       1.24  augustss Static void	ucom_cleanup(struct ucom_softc *);
    154       1.24  augustss Static void	ucom_hwiflow(struct ucom_softc *);
    155       1.24  augustss Static int	ucomparam(struct tty *, struct termios *);
    156       1.24  augustss Static void	ucomstart(struct tty *);
    157       1.24  augustss Static void	ucom_shutdown(struct ucom_softc *);
    158       1.70  christos Static int	ucom_do_ioctl(struct ucom_softc *, u_long, void *,
    159       1.60  christos 			      int, struct lwp *);
    160       1.24  augustss Static void	ucom_dtr(struct ucom_softc *, int);
    161       1.24  augustss Static void	ucom_rts(struct ucom_softc *, int);
    162       1.24  augustss Static void	ucom_break(struct ucom_softc *, int);
    163       1.24  augustss Static usbd_status ucomstartread(struct ucom_softc *);
    164       1.24  augustss Static void	ucomreadcb(usbd_xfer_handle, usbd_private_handle, usbd_status);
    165       1.24  augustss Static void	ucomwritecb(usbd_xfer_handle, usbd_private_handle, usbd_status);
    166       1.29    toshii Static void	tiocm_to_ucom(struct ucom_softc *, u_long, int);
    167       1.24  augustss Static int	ucom_to_tiocm(struct ucom_softc *);
    168        1.1  augustss 
    169        1.3  augustss USB_DECLARE_DRIVER(ucom);
    170        1.1  augustss 
    171        1.3  augustss USB_MATCH(ucom)
    172        1.1  augustss {
    173       1.12  augustss 	return (1);
    174        1.1  augustss }
    175        1.1  augustss 
    176        1.3  augustss USB_ATTACH(ucom)
    177        1.1  augustss {
    178       1.12  augustss 	struct ucom_softc *sc = (struct ucom_softc *)self;
    179       1.12  augustss 	struct ucom_attach_args *uca = aux;
    180       1.12  augustss 	struct tty *tp;
    181       1.12  augustss 
    182       1.35  augustss 	if (uca->info != NULL)
    183       1.59     itohy 		printf(": %s", uca->info);
    184       1.12  augustss 	printf("\n");
    185       1.12  augustss 
    186       1.12  augustss 	sc->sc_udev = uca->device;
    187       1.12  augustss 	sc->sc_iface = uca->iface;
    188       1.12  augustss 	sc->sc_bulkout_no = uca->bulkout;
    189       1.12  augustss 	sc->sc_bulkin_no = uca->bulkin;
    190       1.19  augustss 	sc->sc_ibufsize = uca->ibufsize;
    191       1.22  augustss 	sc->sc_ibufsizepad = uca->ibufsizepad;
    192       1.19  augustss 	sc->sc_obufsize = uca->obufsize;
    193       1.25  augustss 	sc->sc_opkthdrlen = uca->opkthdrlen;
    194       1.12  augustss 	sc->sc_methods = uca->methods;
    195       1.12  augustss 	sc->sc_parent = uca->arg;
    196       1.12  augustss 	sc->sc_portno = uca->portno;
    197       1.12  augustss 
    198       1.12  augustss 	tp = ttymalloc();
    199       1.12  augustss 	tp->t_oproc = ucomstart;
    200       1.12  augustss 	tp->t_param = ucomparam;
    201       1.12  augustss 	sc->sc_tty = tp;
    202       1.12  augustss 
    203       1.12  augustss 	DPRINTF(("ucom_attach: tty_attach %p\n", tp));
    204       1.12  augustss 	tty_attach(tp);
    205       1.12  augustss 
    206       1.31  explorer #if defined(__NetBSD__) && NRND > 0
    207       1.31  explorer 	rnd_attach_source(&sc->sc_rndsource, USBDEVNAME(sc->sc_dev),
    208       1.31  explorer 			  RND_TYPE_TTY, 0);
    209       1.31  explorer #endif
    210       1.31  explorer 
    211       1.12  augustss 	USB_ATTACH_SUCCESS_RETURN;
    212       1.12  augustss }
    213       1.12  augustss 
    214       1.12  augustss USB_DETACH(ucom)
    215       1.12  augustss {
    216       1.12  augustss 	struct ucom_softc *sc = (struct ucom_softc *)self;
    217       1.36  augustss 	struct tty *tp = sc->sc_tty;
    218       1.12  augustss 	int maj, mn;
    219       1.17  augustss 	int s;
    220       1.12  augustss 
    221       1.43  augustss 	DPRINTF(("ucom_detach: sc=%p flags=%d tp=%p, pipe=%d,%d\n",
    222       1.36  augustss 		 sc, flags, tp, sc->sc_bulkin_no, sc->sc_bulkout_no));
    223       1.12  augustss 
    224       1.12  augustss 	sc->sc_dying = 1;
    225       1.12  augustss 
    226       1.33  augustss 	if (sc->sc_bulkin_pipe != NULL)
    227       1.33  augustss 		usbd_abort_pipe(sc->sc_bulkin_pipe);
    228       1.33  augustss 	if (sc->sc_bulkout_pipe != NULL)
    229       1.33  augustss 		usbd_abort_pipe(sc->sc_bulkout_pipe);
    230       1.12  augustss 
    231       1.17  augustss 	s = splusb();
    232       1.17  augustss 	if (--sc->sc_refcnt >= 0) {
    233       1.35  augustss 		/* Wake up anyone waiting */
    234       1.36  augustss 		if (tp != NULL) {
    235  1.70.14.1     joerg 			mutex_spin_enter(&tty_lock);
    236       1.36  augustss 			CLR(tp->t_state, TS_CARR_ON);
    237       1.36  augustss 			CLR(tp->t_cflag, CLOCAL | MDMBUF);
    238       1.36  augustss 			ttyflush(tp, FREAD|FWRITE);
    239  1.70.14.1     joerg 			mutex_spin_exit(&tty_lock);
    240       1.36  augustss 		}
    241       1.17  augustss 		/* Wait for processes to go away. */
    242       1.17  augustss 		usb_detach_wait(USBDEV(sc->sc_dev));
    243       1.17  augustss 	}
    244       1.17  augustss 	splx(s);
    245       1.12  augustss 
    246       1.12  augustss 	/* locate the major number */
    247       1.44   gehenna 	maj = cdevsw_lookup_major(&ucom_cdevsw);
    248       1.12  augustss 
    249       1.12  augustss 	/* Nuke the vnodes for any open instances. */
    250       1.62   thorpej 	mn = device_unit(self);
    251       1.17  augustss 	DPRINTF(("ucom_detach: maj=%d mn=%d\n", maj, mn));
    252       1.12  augustss 	vdevgone(maj, mn, mn, VCHR);
    253       1.22  augustss 	vdevgone(maj, mn | UCOMDIALOUT_MASK, mn | UCOMDIALOUT_MASK, VCHR);
    254       1.22  augustss 	vdevgone(maj, mn | UCOMCALLUNIT_MASK, mn | UCOMCALLUNIT_MASK, VCHR);
    255       1.12  augustss 
    256       1.12  augustss 	/* Detach and free the tty. */
    257       1.36  augustss 	if (tp != NULL) {
    258       1.36  augustss 		tty_detach(tp);
    259       1.36  augustss 		ttyfree(tp);
    260       1.33  augustss 		sc->sc_tty = NULL;
    261       1.33  augustss 	}
    262       1.12  augustss 
    263       1.31  explorer 	/* Detach the random source */
    264       1.31  explorer #if defined(__NetBSD__) && NRND > 0
    265       1.31  explorer 	rnd_detach_source(&sc->sc_rndsource);
    266       1.31  explorer #endif
    267       1.31  explorer 
    268       1.12  augustss 	return (0);
    269       1.12  augustss }
    270       1.12  augustss 
    271       1.12  augustss int
    272       1.24  augustss ucom_activate(device_ptr_t self, enum devact act)
    273       1.12  augustss {
    274       1.12  augustss 	struct ucom_softc *sc = (struct ucom_softc *)self;
    275       1.12  augustss 
    276       1.34  augustss 	DPRINTFN(5,("ucom_activate: %d\n", act));
    277       1.34  augustss 
    278       1.12  augustss 	switch (act) {
    279       1.12  augustss 	case DVACT_ACTIVATE:
    280       1.12  augustss 		return (EOPNOTSUPP);
    281       1.12  augustss 
    282       1.12  augustss 	case DVACT_DEACTIVATE:
    283       1.12  augustss 		sc->sc_dying = 1;
    284       1.12  augustss 		break;
    285       1.12  augustss 	}
    286       1.12  augustss 	return (0);
    287       1.12  augustss }
    288       1.12  augustss 
    289       1.12  augustss void
    290       1.24  augustss ucom_shutdown(struct ucom_softc *sc)
    291       1.12  augustss {
    292       1.12  augustss 	struct tty *tp = sc->sc_tty;
    293       1.12  augustss 
    294       1.12  augustss 	DPRINTF(("ucom_shutdown\n"));
    295       1.12  augustss 	/*
    296       1.12  augustss 	 * Hang up if necessary.  Wait a bit, so the other side has time to
    297       1.12  augustss 	 * notice even if we immediately open the port again.
    298       1.12  augustss 	 */
    299       1.12  augustss 	if (ISSET(tp->t_cflag, HUPCL)) {
    300       1.12  augustss 		ucom_dtr(sc, 0);
    301       1.12  augustss 		(void)tsleep(sc, TTIPRI, ttclos, hz);
    302       1.12  augustss 	}
    303       1.12  augustss }
    304       1.12  augustss 
    305       1.12  augustss int
    306       1.69  christos ucomopen(dev_t dev, int flag, int mode, struct lwp *l)
    307       1.12  augustss {
    308       1.12  augustss 	int unit = UCOMUNIT(dev);
    309       1.12  augustss 	usbd_status err;
    310       1.12  augustss 	struct ucom_softc *sc;
    311       1.12  augustss 	struct tty *tp;
    312       1.12  augustss 	int s;
    313       1.12  augustss 	int error;
    314       1.43  augustss 
    315       1.12  augustss 	if (unit >= ucom_cd.cd_ndevs)
    316       1.12  augustss 		return (ENXIO);
    317       1.12  augustss 	sc = ucom_cd.cd_devs[unit];
    318       1.12  augustss 	if (sc == NULL)
    319       1.12  augustss 		return (ENXIO);
    320       1.12  augustss 
    321       1.12  augustss 	if (sc->sc_dying)
    322       1.12  augustss 		return (EIO);
    323       1.12  augustss 
    324       1.61   thorpej 	if (!device_is_active(&sc->sc_dev))
    325       1.12  augustss 		return (ENXIO);
    326       1.12  augustss 
    327       1.12  augustss 	tp = sc->sc_tty;
    328       1.12  augustss 
    329       1.12  augustss 	DPRINTF(("ucomopen: unit=%d, tp=%p\n", unit, tp));
    330       1.12  augustss 
    331       1.66      elad 	if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp))
    332       1.12  augustss 		return (EBUSY);
    333       1.12  augustss 
    334       1.12  augustss 	s = spltty();
    335       1.12  augustss 
    336       1.12  augustss 	/*
    337       1.12  augustss 	 * Do the following iff this is a first open.
    338       1.12  augustss 	 */
    339       1.12  augustss 	while (sc->sc_opening)
    340       1.12  augustss 		tsleep(&sc->sc_opening, PRIBIO, "ucomop", 0);
    341       1.17  augustss 
    342       1.17  augustss 	if (sc->sc_dying) {
    343       1.17  augustss 		splx(s);
    344       1.17  augustss 		return (EIO);
    345       1.17  augustss 	}
    346       1.12  augustss 	sc->sc_opening = 1;
    347       1.43  augustss 
    348       1.12  augustss 	if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) {
    349       1.12  augustss 		struct termios t;
    350       1.12  augustss 
    351       1.12  augustss 		tp->t_dev = dev;
    352       1.12  augustss 
    353       1.22  augustss 		if (sc->sc_methods->ucom_open != NULL) {
    354       1.22  augustss 			error = sc->sc_methods->ucom_open(sc->sc_parent,
    355       1.22  augustss 							  sc->sc_portno);
    356       1.22  augustss 			if (error) {
    357       1.22  augustss 				ucom_cleanup(sc);
    358       1.26    toshii 				sc->sc_opening = 0;
    359       1.26    toshii 				wakeup(&sc->sc_opening);
    360       1.26    toshii 				splx(s);
    361       1.22  augustss 				return (error);
    362       1.22  augustss 			}
    363       1.22  augustss 		}
    364       1.22  augustss 
    365       1.12  augustss 		ucom_status_change(sc);
    366       1.12  augustss 
    367       1.12  augustss 		/*
    368       1.12  augustss 		 * Initialize the termios status to the defaults.  Add in the
    369       1.12  augustss 		 * sticky bits from TIOCSFLAGS.
    370       1.12  augustss 		 */
    371       1.12  augustss 		t.c_ispeed = 0;
    372       1.12  augustss 		t.c_ospeed = TTYDEF_SPEED;
    373       1.12  augustss 		t.c_cflag = TTYDEF_CFLAG;
    374       1.12  augustss 		if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL))
    375       1.12  augustss 			SET(t.c_cflag, CLOCAL);
    376       1.12  augustss 		if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS))
    377       1.12  augustss 			SET(t.c_cflag, CRTSCTS);
    378       1.12  augustss 		if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF))
    379       1.12  augustss 			SET(t.c_cflag, MDMBUF);
    380       1.12  augustss 		/* Make sure ucomparam() will do something. */
    381       1.12  augustss 		tp->t_ospeed = 0;
    382       1.12  augustss 		(void) ucomparam(tp, &t);
    383       1.12  augustss 		tp->t_iflag = TTYDEF_IFLAG;
    384       1.12  augustss 		tp->t_oflag = TTYDEF_OFLAG;
    385       1.12  augustss 		tp->t_lflag = TTYDEF_LFLAG;
    386       1.12  augustss 		ttychars(tp);
    387       1.12  augustss 		ttsetwater(tp);
    388       1.12  augustss 
    389       1.12  augustss 		/*
    390       1.12  augustss 		 * Turn on DTR.  We must always do this, even if carrier is not
    391       1.12  augustss 		 * present, because otherwise we'd have to use TIOCSDTR
    392       1.12  augustss 		 * immediately after setting CLOCAL, which applications do not
    393       1.12  augustss 		 * expect.  We always assert DTR while the device is open
    394       1.64      gson 		 * unless explicitly requested to deassert it.  Ditto RTS.
    395       1.12  augustss 		 */
    396       1.12  augustss 		ucom_dtr(sc, 1);
    397       1.64      gson 		ucom_rts(sc, 1);
    398       1.12  augustss 
    399       1.30  augustss 		/* XXX CLR(sc->sc_rx_flags, RX_ANY_BLOCK);*/
    400       1.12  augustss 		ucom_hwiflow(sc);
    401       1.12  augustss 
    402       1.12  augustss 		DPRINTF(("ucomopen: open pipes in=%d out=%d\n",
    403       1.12  augustss 			 sc->sc_bulkin_no, sc->sc_bulkout_no));
    404       1.12  augustss 
    405       1.12  augustss 		/* Open the bulk pipes */
    406       1.12  augustss 		err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkin_no, 0,
    407       1.12  augustss 				     &sc->sc_bulkin_pipe);
    408       1.12  augustss 		if (err) {
    409       1.52   nathanw 			DPRINTF(("%s: open bulk in error (addr %d), err=%s\n",
    410       1.43  augustss 				 USBDEVNAME(sc->sc_dev), sc->sc_bulkin_no,
    411       1.12  augustss 				 usbd_errstr(err)));
    412       1.28    toshii 			error = EIO;
    413       1.26    toshii 			goto fail_0;
    414       1.12  augustss 		}
    415       1.12  augustss 		err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkout_no,
    416       1.12  augustss 				     USBD_EXCLUSIVE_USE, &sc->sc_bulkout_pipe);
    417       1.12  augustss 		if (err) {
    418       1.52   nathanw 			DPRINTF(("%s: open bulk out error (addr %d), err=%s\n",
    419       1.12  augustss 				 USBDEVNAME(sc->sc_dev), sc->sc_bulkout_no,
    420       1.12  augustss 				 usbd_errstr(err)));
    421       1.28    toshii 			error = EIO;
    422       1.26    toshii 			goto fail_1;
    423       1.12  augustss 		}
    424       1.43  augustss 
    425       1.12  augustss 		/* Allocate a request and an input buffer and start reading. */
    426       1.12  augustss 		sc->sc_ixfer = usbd_alloc_xfer(sc->sc_udev);
    427       1.28    toshii 		if (sc->sc_ixfer == NULL) {
    428       1.28    toshii 			error = ENOMEM;
    429       1.26    toshii 			goto fail_2;
    430       1.28    toshii 		}
    431       1.26    toshii 
    432       1.22  augustss 		sc->sc_ibuf = usbd_alloc_buffer(sc->sc_ixfer,
    433       1.22  augustss 						sc->sc_ibufsizepad);
    434       1.28    toshii 		if (sc->sc_ibuf == NULL) {
    435       1.28    toshii 			error = ENOMEM;
    436       1.26    toshii 			goto fail_3;
    437       1.28    toshii 		}
    438       1.12  augustss 
    439       1.12  augustss 		sc->sc_oxfer = usbd_alloc_xfer(sc->sc_udev);
    440       1.28    toshii 		if (sc->sc_oxfer == NULL) {
    441       1.28    toshii 			error = ENOMEM;
    442       1.26    toshii 			goto fail_3;
    443       1.28    toshii 		}
    444       1.26    toshii 
    445       1.22  augustss 		sc->sc_obuf = usbd_alloc_buffer(sc->sc_oxfer,
    446       1.25  augustss 						sc->sc_obufsize +
    447       1.25  augustss 						sc->sc_opkthdrlen);
    448       1.28    toshii 		if (sc->sc_obuf == NULL) {
    449       1.28    toshii 			error = ENOMEM;
    450       1.26    toshii 			goto fail_4;
    451       1.28    toshii 		}
    452       1.12  augustss 
    453       1.12  augustss 		ucomstartread(sc);
    454       1.12  augustss 	}
    455       1.12  augustss 	sc->sc_opening = 0;
    456       1.12  augustss 	wakeup(&sc->sc_opening);
    457       1.12  augustss 	splx(s);
    458       1.12  augustss 
    459       1.12  augustss 	error = ttyopen(tp, UCOMDIALOUT(dev), ISSET(flag, O_NONBLOCK));
    460       1.12  augustss 	if (error)
    461       1.12  augustss 		goto bad;
    462       1.12  augustss 
    463       1.32       eeh 	error = (*tp->t_linesw->l_open)(dev, tp);
    464       1.12  augustss 	if (error)
    465       1.12  augustss 		goto bad;
    466       1.12  augustss 
    467       1.12  augustss 	return (0);
    468       1.26    toshii 
    469       1.26    toshii fail_4:
    470       1.26    toshii 	usbd_free_xfer(sc->sc_oxfer);
    471       1.34  augustss 	sc->sc_oxfer = NULL;
    472       1.26    toshii fail_3:
    473       1.26    toshii 	usbd_free_xfer(sc->sc_ixfer);
    474       1.34  augustss 	sc->sc_ixfer = NULL;
    475       1.26    toshii fail_2:
    476       1.26    toshii 	usbd_close_pipe(sc->sc_bulkout_pipe);
    477       1.34  augustss 	sc->sc_bulkout_pipe = NULL;
    478       1.26    toshii fail_1:
    479       1.26    toshii 	usbd_close_pipe(sc->sc_bulkin_pipe);
    480       1.34  augustss 	sc->sc_bulkin_pipe = NULL;
    481       1.26    toshii fail_0:
    482       1.26    toshii 	sc->sc_opening = 0;
    483       1.26    toshii 	wakeup(&sc->sc_opening);
    484       1.26    toshii 	splx(s);
    485       1.28    toshii 	return (error);
    486       1.12  augustss 
    487       1.12  augustss bad:
    488       1.12  augustss 	if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) {
    489       1.12  augustss 		/*
    490       1.12  augustss 		 * We failed to open the device, and nobody else had it opened.
    491       1.12  augustss 		 * Clean up the state as appropriate.
    492       1.12  augustss 		 */
    493       1.12  augustss 		ucom_cleanup(sc);
    494       1.12  augustss 	}
    495       1.12  augustss 
    496       1.12  augustss 	return (error);
    497       1.12  augustss }
    498       1.12  augustss 
    499       1.12  augustss int
    500       1.69  christos ucomclose(dev_t dev, int flag, int mode, struct lwp *l)
    501       1.12  augustss {
    502       1.12  augustss 	struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)];
    503       1.12  augustss 	struct tty *tp = sc->sc_tty;
    504       1.12  augustss 
    505       1.12  augustss 	DPRINTF(("ucomclose: unit=%d\n", UCOMUNIT(dev)));
    506       1.12  augustss 	if (!ISSET(tp->t_state, TS_ISOPEN))
    507       1.12  augustss 		return (0);
    508       1.12  augustss 
    509       1.17  augustss 	sc->sc_refcnt++;
    510       1.17  augustss 
    511       1.32       eeh 	(*tp->t_linesw->l_close)(tp, flag);
    512       1.12  augustss 	ttyclose(tp);
    513       1.12  augustss 
    514       1.12  augustss 	if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) {
    515       1.12  augustss 		/*
    516       1.12  augustss 		 * Although we got a last close, the device may still be in
    517       1.12  augustss 		 * use; e.g. if this was the dialout node, and there are still
    518       1.12  augustss 		 * processes waiting for carrier on the non-dialout node.
    519       1.12  augustss 		 */
    520       1.12  augustss 		ucom_cleanup(sc);
    521       1.12  augustss 	}
    522       1.12  augustss 
    523       1.14  augustss 	if (sc->sc_methods->ucom_close != NULL)
    524       1.14  augustss 		sc->sc_methods->ucom_close(sc->sc_parent, sc->sc_portno);
    525       1.14  augustss 
    526       1.17  augustss 	if (--sc->sc_refcnt < 0)
    527       1.17  augustss 		usb_detach_wakeup(USBDEV(sc->sc_dev));
    528       1.17  augustss 
    529       1.12  augustss 	return (0);
    530       1.12  augustss }
    531       1.43  augustss 
    532       1.12  augustss int
    533       1.24  augustss ucomread(dev_t dev, struct uio *uio, int flag)
    534       1.12  augustss {
    535       1.12  augustss 	struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)];
    536       1.12  augustss 	struct tty *tp = sc->sc_tty;
    537       1.17  augustss 	int error;
    538       1.12  augustss 
    539       1.12  augustss 	if (sc->sc_dying)
    540       1.12  augustss 		return (EIO);
    541       1.43  augustss 
    542       1.17  augustss 	sc->sc_refcnt++;
    543       1.32       eeh 	error = ((*tp->t_linesw->l_read)(tp, uio, flag));
    544       1.17  augustss 	if (--sc->sc_refcnt < 0)
    545       1.17  augustss 		usb_detach_wakeup(USBDEV(sc->sc_dev));
    546       1.17  augustss 	return (error);
    547       1.12  augustss }
    548       1.43  augustss 
    549       1.12  augustss int
    550       1.24  augustss ucomwrite(dev_t dev, struct uio *uio, int flag)
    551       1.12  augustss {
    552       1.12  augustss 	struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)];
    553       1.12  augustss 	struct tty *tp = sc->sc_tty;
    554       1.17  augustss 	int error;
    555       1.12  augustss 
    556       1.12  augustss 	if (sc->sc_dying)
    557       1.12  augustss 		return (EIO);
    558       1.43  augustss 
    559       1.17  augustss 	sc->sc_refcnt++;
    560       1.32       eeh 	error = ((*tp->t_linesw->l_write)(tp, uio, flag));
    561       1.38       scw 	if (--sc->sc_refcnt < 0)
    562       1.38       scw 		usb_detach_wakeup(USBDEV(sc->sc_dev));
    563       1.38       scw 	return (error);
    564       1.38       scw }
    565       1.38       scw 
    566       1.38       scw int
    567       1.60  christos ucompoll(dev_t dev, int events, struct lwp *l)
    568       1.38       scw {
    569       1.38       scw 	struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)];
    570       1.38       scw 	struct tty *tp = sc->sc_tty;
    571       1.56        ws 	int revents;
    572       1.38       scw 
    573       1.38       scw 	if (sc->sc_dying)
    574       1.56        ws 		return (POLLHUP);
    575       1.43  augustss 
    576       1.38       scw 	sc->sc_refcnt++;
    577       1.60  christos 	revents = ((*tp->t_linesw->l_poll)(tp, events, l));
    578       1.17  augustss 	if (--sc->sc_refcnt < 0)
    579       1.17  augustss 		usb_detach_wakeup(USBDEV(sc->sc_dev));
    580       1.56        ws 	return (revents);
    581       1.12  augustss }
    582       1.12  augustss 
    583       1.12  augustss struct tty *
    584       1.24  augustss ucomtty(dev_t dev)
    585       1.12  augustss {
    586       1.12  augustss 	struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)];
    587       1.12  augustss 	struct tty *tp = sc->sc_tty;
    588       1.12  augustss 
    589       1.12  augustss 	return (tp);
    590       1.12  augustss }
    591       1.12  augustss 
    592       1.12  augustss int
    593       1.70  christos ucomioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l)
    594       1.12  augustss {
    595       1.12  augustss 	struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)];
    596       1.17  augustss 	int error;
    597       1.17  augustss 
    598       1.17  augustss 	sc->sc_refcnt++;
    599       1.60  christos 	error = ucom_do_ioctl(sc, cmd, data, flag, l);
    600       1.17  augustss 	if (--sc->sc_refcnt < 0)
    601       1.17  augustss 		usb_detach_wakeup(USBDEV(sc->sc_dev));
    602       1.17  augustss 	return (error);
    603       1.17  augustss }
    604       1.17  augustss 
    605       1.17  augustss Static int
    606       1.70  christos ucom_do_ioctl(struct ucom_softc *sc, u_long cmd, void *data,
    607       1.60  christos 	      int flag, struct lwp *l)
    608       1.17  augustss {
    609       1.12  augustss 	struct tty *tp = sc->sc_tty;
    610       1.12  augustss 	int error;
    611       1.12  augustss 	int s;
    612       1.12  augustss 
    613       1.12  augustss 	if (sc->sc_dying)
    614       1.12  augustss 		return (EIO);
    615       1.43  augustss 
    616       1.12  augustss 	DPRINTF(("ucomioctl: cmd=0x%08lx\n", cmd));
    617       1.12  augustss 
    618       1.60  christos 	error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l);
    619       1.42    atatat 	if (error != EPASSTHROUGH)
    620       1.12  augustss 		return (error);
    621       1.12  augustss 
    622       1.60  christos 	error = ttioctl(tp, cmd, data, flag, l);
    623       1.42    atatat 	if (error != EPASSTHROUGH)
    624       1.12  augustss 		return (error);
    625       1.12  augustss 
    626       1.12  augustss 	if (sc->sc_methods->ucom_ioctl != NULL) {
    627       1.12  augustss 		error = sc->sc_methods->ucom_ioctl(sc->sc_parent,
    628       1.60  christos 			    sc->sc_portno, cmd, data, flag, l->l_proc);
    629       1.42    atatat 		if (error != EPASSTHROUGH)
    630       1.12  augustss 			return (error);
    631       1.12  augustss 	}
    632       1.12  augustss 
    633       1.12  augustss 	error = 0;
    634       1.12  augustss 
    635       1.12  augustss 	DPRINTF(("ucomioctl: our cmd=0x%08lx\n", cmd));
    636       1.12  augustss 	s = spltty();
    637       1.12  augustss 
    638       1.12  augustss 	switch (cmd) {
    639       1.12  augustss 	case TIOCSBRK:
    640       1.12  augustss 		ucom_break(sc, 1);
    641       1.12  augustss 		break;
    642       1.12  augustss 
    643       1.12  augustss 	case TIOCCBRK:
    644       1.12  augustss 		ucom_break(sc, 0);
    645       1.12  augustss 		break;
    646       1.12  augustss 
    647       1.12  augustss 	case TIOCSDTR:
    648       1.12  augustss 		ucom_dtr(sc, 1);
    649       1.12  augustss 		break;
    650       1.12  augustss 
    651       1.12  augustss 	case TIOCCDTR:
    652       1.12  augustss 		ucom_dtr(sc, 0);
    653       1.12  augustss 		break;
    654       1.12  augustss 
    655       1.12  augustss 	case TIOCGFLAGS:
    656       1.12  augustss 		*(int *)data = sc->sc_swflags;
    657       1.12  augustss 		break;
    658       1.12  augustss 
    659       1.12  augustss 	case TIOCSFLAGS:
    660       1.67      elad 		error = kauth_authorize_device_tty(l->l_cred,
    661       1.67      elad 		    KAUTH_DEVICE_TTY_PRIVSET, tp);
    662       1.12  augustss 		if (error)
    663       1.12  augustss 			break;
    664       1.12  augustss 		sc->sc_swflags = *(int *)data;
    665       1.12  augustss 		break;
    666       1.12  augustss 
    667       1.12  augustss 	case TIOCMSET:
    668       1.12  augustss 	case TIOCMBIS:
    669       1.12  augustss 	case TIOCMBIC:
    670       1.12  augustss 		tiocm_to_ucom(sc, cmd, *(int *)data);
    671       1.12  augustss 		break;
    672       1.12  augustss 
    673       1.12  augustss 	case TIOCMGET:
    674       1.12  augustss 		*(int *)data = ucom_to_tiocm(sc);
    675       1.12  augustss 		break;
    676       1.12  augustss 
    677       1.12  augustss 	default:
    678       1.42    atatat 		error = EPASSTHROUGH;
    679       1.12  augustss 		break;
    680       1.12  augustss 	}
    681       1.12  augustss 
    682       1.12  augustss 	splx(s);
    683       1.12  augustss 
    684       1.12  augustss 	return (error);
    685       1.12  augustss }
    686       1.12  augustss 
    687       1.17  augustss Static void
    688       1.29    toshii tiocm_to_ucom(struct ucom_softc *sc, u_long how, int ttybits)
    689       1.12  augustss {
    690       1.12  augustss 	u_char combits;
    691        1.3  augustss 
    692       1.12  augustss 	combits = 0;
    693       1.12  augustss 	if (ISSET(ttybits, TIOCM_DTR))
    694       1.12  augustss 		SET(combits, UMCR_DTR);
    695       1.12  augustss 	if (ISSET(ttybits, TIOCM_RTS))
    696       1.12  augustss 		SET(combits, UMCR_RTS);
    697       1.43  augustss 
    698       1.12  augustss 	switch (how) {
    699       1.12  augustss 	case TIOCMBIC:
    700       1.12  augustss 		CLR(sc->sc_mcr, combits);
    701       1.12  augustss 		break;
    702       1.12  augustss 
    703       1.12  augustss 	case TIOCMBIS:
    704       1.12  augustss 		SET(sc->sc_mcr, combits);
    705       1.12  augustss 		break;
    706       1.12  augustss 
    707       1.12  augustss 	case TIOCMSET:
    708       1.12  augustss 		CLR(sc->sc_mcr, UMCR_DTR | UMCR_RTS);
    709       1.12  augustss 		SET(sc->sc_mcr, combits);
    710       1.12  augustss 		break;
    711       1.12  augustss 	}
    712       1.12  augustss 
    713       1.27    toshii 	if (how == TIOCMSET || ISSET(combits, UMCR_DTR))
    714       1.27    toshii 		ucom_dtr(sc, (sc->sc_mcr & UMCR_DTR) != 0);
    715       1.27    toshii 	if (how == TIOCMSET || ISSET(combits, UMCR_RTS))
    716       1.27    toshii 		ucom_rts(sc, (sc->sc_mcr & UMCR_RTS) != 0);
    717       1.12  augustss }
    718       1.12  augustss 
    719       1.17  augustss Static int
    720       1.24  augustss ucom_to_tiocm(struct ucom_softc *sc)
    721       1.12  augustss {
    722       1.12  augustss 	u_char combits;
    723       1.12  augustss 	int ttybits = 0;
    724       1.12  augustss 
    725       1.12  augustss 	combits = sc->sc_mcr;
    726       1.12  augustss 	if (ISSET(combits, UMCR_DTR))
    727       1.12  augustss 		SET(ttybits, TIOCM_DTR);
    728       1.12  augustss 	if (ISSET(combits, UMCR_RTS))
    729       1.12  augustss 		SET(ttybits, TIOCM_RTS);
    730       1.12  augustss 
    731       1.12  augustss 	combits = sc->sc_msr;
    732       1.12  augustss 	if (ISSET(combits, UMSR_DCD))
    733       1.12  augustss 		SET(ttybits, TIOCM_CD);
    734       1.12  augustss 	if (ISSET(combits, UMSR_CTS))
    735       1.12  augustss 		SET(ttybits, TIOCM_CTS);
    736       1.12  augustss 	if (ISSET(combits, UMSR_DSR))
    737       1.12  augustss 		SET(ttybits, TIOCM_DSR);
    738       1.12  augustss 	if (ISSET(combits, UMSR_RI | UMSR_TERI))
    739       1.12  augustss 		SET(ttybits, TIOCM_RI);
    740       1.12  augustss 
    741       1.12  augustss #if 0
    742       1.12  augustss XXX;
    743       1.12  augustss 	if (sc->sc_ier != 0)
    744       1.12  augustss 		SET(ttybits, TIOCM_LE);
    745       1.12  augustss #endif
    746       1.12  augustss 
    747       1.12  augustss 	return (ttybits);
    748       1.12  augustss }
    749       1.12  augustss 
    750       1.17  augustss Static void
    751       1.12  augustss ucom_break(sc, onoff)
    752       1.12  augustss 	struct ucom_softc *sc;
    753       1.12  augustss 	int onoff;
    754       1.12  augustss {
    755       1.12  augustss 	DPRINTF(("ucom_break: onoff=%d\n", onoff));
    756       1.12  augustss 
    757       1.14  augustss 	if (sc->sc_methods->ucom_set != NULL)
    758       1.14  augustss 		sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno,
    759       1.14  augustss 		    UCOM_SET_BREAK, onoff);
    760       1.12  augustss }
    761       1.12  augustss 
    762       1.17  augustss Static void
    763       1.24  augustss ucom_dtr(struct ucom_softc *sc, int onoff)
    764       1.12  augustss {
    765       1.12  augustss 	DPRINTF(("ucom_dtr: onoff=%d\n", onoff));
    766       1.12  augustss 
    767       1.14  augustss 	if (sc->sc_methods->ucom_set != NULL)
    768       1.43  augustss 		sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno,
    769       1.14  augustss 		    UCOM_SET_DTR, onoff);
    770       1.12  augustss }
    771       1.12  augustss 
    772       1.17  augustss Static void
    773       1.24  augustss ucom_rts(struct ucom_softc *sc, int onoff)
    774       1.12  augustss {
    775       1.12  augustss 	DPRINTF(("ucom_rts: onoff=%d\n", onoff));
    776       1.12  augustss 
    777       1.14  augustss 	if (sc->sc_methods->ucom_set != NULL)
    778       1.43  augustss 		sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno,
    779       1.14  augustss 		    UCOM_SET_RTS, onoff);
    780       1.12  augustss }
    781       1.12  augustss 
    782       1.22  augustss void
    783       1.24  augustss ucom_status_change(struct ucom_softc *sc)
    784       1.12  augustss {
    785       1.27    toshii 	struct tty *tp = sc->sc_tty;
    786       1.27    toshii 	u_char old_msr;
    787       1.27    toshii 
    788       1.14  augustss 	if (sc->sc_methods->ucom_get_status != NULL) {
    789       1.27    toshii 		old_msr = sc->sc_msr;
    790       1.14  augustss 		sc->sc_methods->ucom_get_status(sc->sc_parent, sc->sc_portno,
    791       1.14  augustss 		    &sc->sc_lsr, &sc->sc_msr);
    792       1.27    toshii 		if (ISSET((sc->sc_msr ^ old_msr), UMSR_DCD))
    793       1.32       eeh 			(*tp->t_linesw->l_modem)(tp,
    794       1.27    toshii 			    ISSET(sc->sc_msr, UMSR_DCD));
    795       1.14  augustss 	} else {
    796       1.14  augustss 		sc->sc_lsr = 0;
    797       1.54  augustss 		/* Assume DCD is present, if we have no chance to check it. */
    798       1.54  augustss 		sc->sc_msr = UMSR_DCD;
    799       1.14  augustss 	}
    800       1.12  augustss }
    801       1.12  augustss 
    802       1.17  augustss Static int
    803       1.24  augustss ucomparam(struct tty *tp, struct termios *t)
    804       1.12  augustss {
    805       1.12  augustss 	struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(tp->t_dev)];
    806       1.14  augustss 	int error;
    807       1.12  augustss 
    808       1.12  augustss 	if (sc->sc_dying)
    809       1.12  augustss 		return (EIO);
    810       1.12  augustss 
    811       1.12  augustss 	/* Check requested parameters. */
    812       1.12  augustss 	if (t->c_ispeed && t->c_ispeed != t->c_ospeed)
    813       1.12  augustss 		return (EINVAL);
    814       1.12  augustss 
    815       1.12  augustss 	/*
    816       1.12  augustss 	 * For the console, always force CLOCAL and !HUPCL, so that the port
    817       1.12  augustss 	 * is always active.
    818       1.12  augustss 	 */
    819       1.12  augustss 	if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR)) {
    820       1.12  augustss 		SET(t->c_cflag, CLOCAL);
    821       1.12  augustss 		CLR(t->c_cflag, HUPCL);
    822       1.12  augustss 	}
    823       1.12  augustss 
    824       1.12  augustss 	/*
    825       1.12  augustss 	 * If there were no changes, don't do anything.  This avoids dropping
    826       1.12  augustss 	 * input and improves performance when all we did was frob things like
    827       1.12  augustss 	 * VMIN and VTIME.
    828       1.12  augustss 	 */
    829       1.12  augustss 	if (tp->t_ospeed == t->c_ospeed &&
    830       1.12  augustss 	    tp->t_cflag == t->c_cflag)
    831       1.12  augustss 		return (0);
    832       1.12  augustss 
    833       1.30  augustss 	/* XXX lcr = ISSET(sc->sc_lcr, LCR_SBREAK) | cflag2lcr(t->c_cflag); */
    834       1.12  augustss 
    835       1.12  augustss 	/* And copy to tty. */
    836       1.12  augustss 	tp->t_ispeed = 0;
    837       1.12  augustss 	tp->t_ospeed = t->c_ospeed;
    838       1.12  augustss 	tp->t_cflag = t->c_cflag;
    839       1.12  augustss 
    840       1.14  augustss 	if (sc->sc_methods->ucom_param != NULL) {
    841       1.14  augustss 		error = sc->sc_methods->ucom_param(sc->sc_parent, sc->sc_portno,
    842       1.14  augustss 			    t);
    843       1.14  augustss 		if (error)
    844       1.14  augustss 			return (error);
    845       1.14  augustss 	}
    846       1.12  augustss 
    847       1.30  augustss 	/* XXX worry about CHWFLOW */
    848       1.12  augustss 
    849       1.12  augustss 	/*
    850       1.12  augustss 	 * Update the tty layer's idea of the carrier bit, in case we changed
    851       1.12  augustss 	 * CLOCAL or MDMBUF.  We don't hang up here; we only do that by
    852       1.12  augustss 	 * explicit request.
    853       1.12  augustss 	 */
    854       1.12  augustss 	DPRINTF(("ucomparam: l_modem\n"));
    855       1.54  augustss 	(void) (*tp->t_linesw->l_modem)(tp, ISSET(sc->sc_msr, UMSR_DCD));
    856       1.12  augustss 
    857       1.12  augustss #if 0
    858       1.12  augustss XXX what if the hardware is not open
    859       1.12  augustss 	if (!ISSET(t->c_cflag, CHWFLOW)) {
    860       1.12  augustss 		if (sc->sc_tx_stopped) {
    861       1.12  augustss 			sc->sc_tx_stopped = 0;
    862       1.12  augustss 			ucomstart(tp);
    863       1.12  augustss 		}
    864       1.12  augustss 	}
    865       1.12  augustss #endif
    866       1.12  augustss 
    867       1.12  augustss 	return (0);
    868       1.12  augustss }
    869       1.12  augustss 
    870       1.12  augustss /*
    871       1.12  augustss  * (un)block input via hw flowcontrol
    872       1.12  augustss  */
    873       1.17  augustss Static void
    874       1.69  christos ucom_hwiflow(struct ucom_softc *sc)
    875       1.12  augustss {
    876       1.19  augustss 	DPRINTF(("ucom_hwiflow:\n"));
    877       1.12  augustss #if 0
    878       1.12  augustss XXX
    879       1.12  augustss 	bus_space_tag_t iot = sc->sc_iot;
    880       1.12  augustss 	bus_space_handle_t ioh = sc->sc_ioh;
    881       1.12  augustss 
    882       1.12  augustss 	if (sc->sc_mcr_rts == 0)
    883       1.12  augustss 		return;
    884       1.12  augustss 
    885       1.12  augustss 	if (ISSET(sc->sc_rx_flags, RX_ANY_BLOCK)) {
    886       1.12  augustss 		CLR(sc->sc_mcr, sc->sc_mcr_rts);
    887       1.12  augustss 		CLR(sc->sc_mcr_active, sc->sc_mcr_rts);
    888       1.12  augustss 	} else {
    889       1.12  augustss 		SET(sc->sc_mcr, sc->sc_mcr_rts);
    890       1.12  augustss 		SET(sc->sc_mcr_active, sc->sc_mcr_rts);
    891       1.12  augustss 	}
    892       1.12  augustss 	bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr_active);
    893       1.12  augustss #endif
    894        1.1  augustss }
    895        1.3  augustss 
    896       1.17  augustss Static void
    897       1.24  augustss ucomstart(struct tty *tp)
    898       1.12  augustss {
    899       1.12  augustss 	struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(tp->t_dev)];
    900       1.12  augustss 	usbd_status err;
    901       1.12  augustss 	int s;
    902       1.12  augustss 	u_char *data;
    903       1.12  augustss 	int cnt;
    904       1.12  augustss 
    905       1.12  augustss 	if (sc->sc_dying)
    906       1.12  augustss 		return;
    907       1.12  augustss 
    908       1.12  augustss 	s = spltty();
    909       1.12  augustss 	if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) {
    910       1.19  augustss 		DPRINTFN(4,("ucomstart: no go, state=0x%x\n", tp->t_state));
    911       1.12  augustss 		goto out;
    912       1.12  augustss 	}
    913       1.12  augustss 	if (sc->sc_tx_stopped)
    914       1.12  augustss 		goto out;
    915       1.12  augustss 
    916       1.12  augustss 	if (tp->t_outq.c_cc <= tp->t_lowat) {
    917       1.12  augustss 		if (ISSET(tp->t_state, TS_ASLEEP)) {
    918       1.12  augustss 			CLR(tp->t_state, TS_ASLEEP);
    919       1.12  augustss 			wakeup(&tp->t_outq);
    920       1.12  augustss 		}
    921       1.12  augustss 		selwakeup(&tp->t_wsel);
    922       1.12  augustss 		if (tp->t_outq.c_cc == 0)
    923       1.12  augustss 			goto out;
    924       1.12  augustss 	}
    925       1.12  augustss 
    926       1.12  augustss 	/* Grab the first contiguous region of buffer space. */
    927       1.12  augustss 	data = tp->t_outq.c_cf;
    928       1.12  augustss 	cnt = ndqb(&tp->t_outq, 0);
    929       1.12  augustss 
    930       1.12  augustss 	if (cnt == 0) {
    931       1.12  augustss 		DPRINTF(("ucomstart: cnt==0\n"));
    932       1.12  augustss 		goto out;
    933       1.12  augustss 	}
    934       1.12  augustss 
    935       1.12  augustss 	SET(tp->t_state, TS_BUSY);
    936       1.12  augustss 
    937       1.19  augustss 	if (cnt > sc->sc_obufsize) {
    938       1.12  augustss 		DPRINTF(("ucomstart: big buffer %d chars\n", cnt));
    939       1.19  augustss 		cnt = sc->sc_obufsize;
    940       1.12  augustss 	}
    941       1.22  augustss 	if (sc->sc_methods->ucom_write != NULL)
    942       1.22  augustss 		sc->sc_methods->ucom_write(sc->sc_parent, sc->sc_portno,
    943       1.22  augustss 					   sc->sc_obuf, data, &cnt);
    944       1.22  augustss 	else
    945       1.22  augustss 		memcpy(sc->sc_obuf, data, cnt);
    946       1.12  augustss 
    947       1.12  augustss 	DPRINTFN(4,("ucomstart: %d chars\n", cnt));
    948       1.43  augustss 	usbd_setup_xfer(sc->sc_oxfer, sc->sc_bulkout_pipe,
    949       1.12  augustss 			(usbd_private_handle)sc, sc->sc_obuf, cnt,
    950       1.12  augustss 			USBD_NO_COPY, USBD_NO_TIMEOUT, ucomwritecb);
    951       1.12  augustss 	/* What can we do on error? */
    952       1.12  augustss 	err = usbd_transfer(sc->sc_oxfer);
    953       1.12  augustss #ifdef DIAGNOSTIC
    954       1.12  augustss 	if (err != USBD_IN_PROGRESS)
    955       1.12  augustss 		printf("ucomstart: err=%s\n", usbd_errstr(err));
    956        1.3  augustss #endif
    957        1.3  augustss 
    958       1.12  augustss out:
    959       1.12  augustss 	splx(s);
    960       1.12  augustss }
    961       1.12  augustss 
    962       1.21    itojun void
    963       1.69  christos ucomstop(struct tty *tp, int flag)
    964       1.12  augustss {
    965       1.19  augustss 	DPRINTF(("ucomstop: flag=%d\n", flag));
    966       1.19  augustss #if 0
    967       1.19  augustss 	/*struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(tp->t_dev)];*/
    968       1.12  augustss 	int s;
    969       1.12  augustss 
    970       1.12  augustss 	s = spltty();
    971       1.12  augustss 	if (ISSET(tp->t_state, TS_BUSY)) {
    972       1.12  augustss 		DPRINTF(("ucomstop: XXX\n"));
    973       1.19  augustss 		/* sc->sc_tx_stopped = 1; */
    974       1.12  augustss 		if (!ISSET(tp->t_state, TS_TTSTOP))
    975       1.12  augustss 			SET(tp->t_state, TS_FLUSH);
    976       1.12  augustss 	}
    977       1.12  augustss 	splx(s);
    978       1.19  augustss #endif
    979       1.12  augustss }
    980       1.12  augustss 
    981       1.17  augustss Static void
    982       1.24  augustss ucomwritecb(usbd_xfer_handle xfer, usbd_private_handle p, usbd_status status)
    983       1.12  augustss {
    984       1.12  augustss 	struct ucom_softc *sc = (struct ucom_softc *)p;
    985       1.12  augustss 	struct tty *tp = sc->sc_tty;
    986       1.12  augustss 	u_int32_t cc;
    987       1.12  augustss 	int s;
    988       1.12  augustss 
    989       1.12  augustss 	DPRINTFN(5,("ucomwritecb: status=%d\n", status));
    990       1.12  augustss 
    991       1.34  augustss 	if (status == USBD_CANCELLED || sc->sc_dying)
    992       1.39  augustss 		goto error;
    993       1.12  augustss 
    994       1.12  augustss 	if (status) {
    995       1.12  augustss 		DPRINTF(("ucomwritecb: status=%d\n", status));
    996       1.12  augustss 		usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe);
    997       1.12  augustss 		/* XXX we should restart after some delay. */
    998       1.39  augustss 		goto error;
    999       1.12  augustss 	}
   1000       1.12  augustss 
   1001       1.15  augustss 	usbd_get_xfer_status(xfer, NULL, NULL, &cc, NULL);
   1002       1.31  explorer #if defined(__NetBSD__) && NRND > 0
   1003       1.31  explorer 	rnd_add_uint32(&sc->sc_rndsource, cc);
   1004       1.31  explorer #endif
   1005       1.12  augustss 	DPRINTFN(5,("ucomwritecb: cc=%d\n", cc));
   1006       1.25  augustss 	/* convert from USB bytes to tty bytes */
   1007       1.25  augustss 	cc -= sc->sc_opkthdrlen;
   1008       1.12  augustss 
   1009       1.12  augustss 	s = spltty();
   1010       1.12  augustss 	CLR(tp->t_state, TS_BUSY);
   1011       1.12  augustss 	if (ISSET(tp->t_state, TS_FLUSH))
   1012       1.12  augustss 		CLR(tp->t_state, TS_FLUSH);
   1013       1.12  augustss 	else
   1014       1.12  augustss 		ndflush(&tp->t_outq, cc);
   1015       1.32       eeh 	(*tp->t_linesw->l_start)(tp);
   1016       1.39  augustss 	splx(s);
   1017       1.39  augustss 	return;
   1018       1.39  augustss 
   1019       1.39  augustss error:
   1020       1.39  augustss 	s = spltty();
   1021       1.39  augustss 	CLR(tp->t_state, TS_BUSY);
   1022       1.12  augustss 	splx(s);
   1023       1.12  augustss }
   1024       1.12  augustss 
   1025       1.17  augustss Static usbd_status
   1026       1.24  augustss ucomstartread(struct ucom_softc *sc)
   1027       1.12  augustss {
   1028       1.12  augustss 	usbd_status err;
   1029       1.12  augustss 
   1030       1.12  augustss 	DPRINTFN(5,("ucomstartread: start\n"));
   1031       1.43  augustss 	usbd_setup_xfer(sc->sc_ixfer, sc->sc_bulkin_pipe,
   1032       1.43  augustss 			(usbd_private_handle)sc,
   1033       1.19  augustss 			sc->sc_ibuf, sc->sc_ibufsize,
   1034       1.12  augustss 			USBD_SHORT_XFER_OK | USBD_NO_COPY,
   1035       1.12  augustss 			USBD_NO_TIMEOUT, ucomreadcb);
   1036       1.12  augustss 	err = usbd_transfer(sc->sc_ixfer);
   1037       1.12  augustss 	if (err != USBD_IN_PROGRESS) {
   1038       1.12  augustss 		DPRINTF(("ucomstartread: err=%s\n", usbd_errstr(err)));
   1039       1.12  augustss 		return (err);
   1040       1.12  augustss 	}
   1041       1.12  augustss 	return (USBD_NORMAL_COMPLETION);
   1042       1.12  augustss }
   1043       1.43  augustss 
   1044       1.17  augustss Static void
   1045       1.24  augustss ucomreadcb(usbd_xfer_handle xfer, usbd_private_handle p, usbd_status status)
   1046       1.12  augustss {
   1047       1.12  augustss 	struct ucom_softc *sc = (struct ucom_softc *)p;
   1048       1.12  augustss 	struct tty *tp = sc->sc_tty;
   1049       1.55  christos 	int (*rint)(int, struct tty *) = tp->t_linesw->l_rint;
   1050       1.12  augustss 	usbd_status err;
   1051       1.12  augustss 	u_int32_t cc;
   1052       1.12  augustss 	u_char *cp;
   1053       1.12  augustss 	int s;
   1054       1.12  augustss 
   1055       1.34  augustss 	DPRINTFN(5,("ucomreadcb: status=%d\n", status));
   1056       1.34  augustss 
   1057       1.34  augustss 	if (status == USBD_CANCELLED || status == USBD_IOERROR ||
   1058       1.34  augustss 	    sc->sc_dying) {
   1059       1.34  augustss 		DPRINTF(("ucomreadcb: dying\n"));
   1060       1.34  augustss 		/* Send something to wake upper layer */
   1061       1.34  augustss 		s = spltty();
   1062       1.34  augustss 		(*rint)('\n', tp);
   1063  1.70.14.2     joerg 		mutex_spin_enter(&tty_lock);	/* XXX */
   1064       1.34  augustss 		ttwakeup(tp);
   1065  1.70.14.2     joerg 		mutex_spin_exit(&tty_lock);	/* XXX */
   1066       1.34  augustss 		splx(s);
   1067       1.12  augustss 		return;
   1068       1.34  augustss 	}
   1069       1.12  augustss 
   1070       1.12  augustss 	if (status) {
   1071       1.12  augustss 		usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe);
   1072       1.12  augustss 		/* XXX we should restart after some delay. */
   1073       1.12  augustss 		return;
   1074       1.12  augustss 	}
   1075       1.12  augustss 
   1076       1.48   thorpej 	usbd_get_xfer_status(xfer, NULL, (void *)&cp, &cc, NULL);
   1077       1.31  explorer #if defined(__NetBSD__) && NRND > 0
   1078       1.31  explorer 	rnd_add_uint32(&sc->sc_rndsource, cc);
   1079       1.31  explorer #endif
   1080       1.12  augustss 	DPRINTFN(5,("ucomreadcb: got %d chars, tp=%p\n", cc, tp));
   1081       1.22  augustss 	if (sc->sc_methods->ucom_read != NULL)
   1082       1.22  augustss 		sc->sc_methods->ucom_read(sc->sc_parent, sc->sc_portno,
   1083       1.22  augustss 					  &cp, &cc);
   1084       1.22  augustss 
   1085       1.12  augustss 	s = spltty();
   1086       1.12  augustss 	/* Give characters to tty layer. */
   1087       1.12  augustss 	while (cc-- > 0) {
   1088       1.12  augustss 		DPRINTFN(7,("ucomreadcb: char=0x%02x\n", *cp));
   1089       1.12  augustss 		if ((*rint)(*cp++, tp) == -1) {
   1090       1.12  augustss 			/* XXX what should we do? */
   1091       1.19  augustss 			printf("%s: lost %d chars\n", USBDEVNAME(sc->sc_dev),
   1092       1.19  augustss 			       cc);
   1093       1.12  augustss 			break;
   1094       1.12  augustss 		}
   1095       1.12  augustss 	}
   1096       1.12  augustss 	splx(s);
   1097       1.12  augustss 
   1098       1.12  augustss 	err = ucomstartread(sc);
   1099       1.12  augustss 	if (err) {
   1100       1.12  augustss 		printf("%s: read start failed\n", USBDEVNAME(sc->sc_dev));
   1101       1.12  augustss 		/* XXX what should we dow now? */
   1102       1.12  augustss 	}
   1103       1.12  augustss }
   1104       1.12  augustss 
   1105       1.17  augustss Static void
   1106       1.24  augustss ucom_cleanup(struct ucom_softc *sc)
   1107       1.12  augustss {
   1108       1.12  augustss 	DPRINTF(("ucom_cleanup: closing pipes\n"));
   1109       1.12  augustss 
   1110       1.12  augustss 	ucom_shutdown(sc);
   1111       1.33  augustss 	if (sc->sc_bulkin_pipe != NULL) {
   1112       1.33  augustss 		usbd_abort_pipe(sc->sc_bulkin_pipe);
   1113       1.33  augustss 		usbd_close_pipe(sc->sc_bulkin_pipe);
   1114       1.33  augustss 		sc->sc_bulkin_pipe = NULL;
   1115       1.33  augustss 	}
   1116       1.33  augustss 	if (sc->sc_bulkout_pipe != NULL) {
   1117       1.33  augustss 		usbd_abort_pipe(sc->sc_bulkout_pipe);
   1118       1.33  augustss 		usbd_close_pipe(sc->sc_bulkout_pipe);
   1119       1.33  augustss 		sc->sc_bulkout_pipe = NULL;
   1120       1.33  augustss 	}
   1121       1.33  augustss 	if (sc->sc_ixfer != NULL) {
   1122       1.33  augustss 		usbd_free_xfer(sc->sc_ixfer);
   1123       1.33  augustss 		sc->sc_ixfer = NULL;
   1124       1.33  augustss 	}
   1125       1.33  augustss 	if (sc->sc_oxfer != NULL) {
   1126       1.33  augustss 		usbd_free_xfer(sc->sc_oxfer);
   1127       1.33  augustss 		sc->sc_oxfer = NULL;
   1128       1.33  augustss 	}
   1129       1.12  augustss }
   1130       1.13  augustss 
   1131       1.13  augustss #endif /* NUCOM > 0 */
   1132       1.12  augustss 
   1133       1.20  augustss int
   1134       1.24  augustss ucomprint(void *aux, const char *pnp)
   1135       1.12  augustss {
   1136       1.37  augustss 	struct ucom_attach_args *uca = aux;
   1137       1.12  augustss 
   1138       1.12  augustss 	if (pnp)
   1139       1.49   thorpej 		aprint_normal("ucom at %s", pnp);
   1140       1.37  augustss 	if (uca->portno != UCOM_UNK_PORTNO)
   1141       1.49   thorpej 		aprint_normal(" portno %d", uca->portno);
   1142       1.12  augustss 	return (UNCONF);
   1143       1.12  augustss }
   1144       1.12  augustss 
   1145       1.20  augustss int
   1146       1.53  drochner ucomsubmatch(struct device *parent, struct cfdata *cf,
   1147       1.69  christos 	     const int *ldesc, void *aux)
   1148       1.12  augustss {
   1149       1.12  augustss 	struct ucom_attach_args *uca = aux;
   1150       1.12  augustss 
   1151       1.12  augustss 	if (uca->portno != UCOM_UNK_PORTNO &&
   1152       1.53  drochner 	    cf->cf_loc[UCOMBUSCF_PORTNO] != UCOMBUSCF_PORTNO_DEFAULT &&
   1153       1.53  drochner 	    cf->cf_loc[UCOMBUSCF_PORTNO] != uca->portno)
   1154       1.12  augustss 		return (0);
   1155       1.46   thorpej 	return (config_match(parent, cf, aux));
   1156       1.12  augustss }
   1157