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freebsd-dev/sys/dev/usb/ucom.c
Josef Karthauser 528d1a7fbc Replace the FOO_DEBUG definitions with USB_DEBUG, and switch the 
debugging levels to off by default.  Now that debug levels can be
tweaked by sysctl we don't need to go through hoops to get the
different usb parts to produce debug data.
2002-07-31 14:34:36 +00:00

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/* $NetBSD: ucom.c,v 1.39 2001/08/16 22:31:24 augustss Exp $ */
/* $FreeBSD$ */
/*-
* Copyright (c) 2001-2002, Shunsuke Akiyama <akiyama@jp.FreeBSD.org>.
* All rights reserved.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*/
/*
* Copyright (c) 1998, 2000 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.
*/
/*
* TODO:
* 1. How do I handle hotchar?
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/bus.h>
#include <sys/ioccom.h>
#include <sys/fcntl.h>
#include <sys/conf.h>
#include <sys/tty.h>
#include <sys/clist.h>
#include <sys/file.h>
#if __FreeBSD_version >= 500014
#include <sys/selinfo.h>
#else
#include <sys/select.h>
#endif
#include <sys/proc.h>
#include <sys/vnode.h>
#include <sys/poll.h>
#include <sys/sysctl.h>
#include <dev/usb/usb.h>
#include <dev/usb/usbcdc.h>
#include <dev/usb/usbdi.h>
#include <dev/usb/usbdi_util.h>
#include <dev/usb/usbdevs.h>
#include <dev/usb/usb_quirks.h>
#include <dev/usb/ucomvar.h>
#ifdef USB_DEBUG
static int ucomdebug = 0;
SYSCTL_INT(_debug_usb, OID_AUTO, ucom, CTLFLAG_RW,
&ucomdebug, 0, "ucom debug level");
#define DPRINTF(x) do { \
if (ucomdebug) \
logprintf x; \
} while (0)
#define DPRINTFN(n, x) do { \
if (ucomdebug > (n)) \
logprintf x; \
} while (0)
#else
#define DPRINTF(x)
#define DPRINTFN(n, x)
#endif
Static d_open_t ucomopen;
Static d_close_t ucomclose;
Static d_read_t ucomread;
Static d_write_t ucomwrite;
Static d_ioctl_t ucomioctl;
#define UCOM_CDEV_MAJOR 138
static struct cdevsw ucom_cdevsw = {
/* open */ ucomopen,
/* close */ ucomclose,
/* read */ ucomread,
/* write */ ucomwrite,
/* ioctl */ ucomioctl,
/* poll */ ttypoll,
/* mmap */ nommap,
/* strategy */ nostrategy,
/* name */ "ucom",
/* maj */ UCOM_CDEV_MAJOR,
/* dump */ nodump,
/* psize */ nopsize,
/* flags */ D_TTY | D_KQFILTER,
#if __FreeBSD_version < 500014
/* bmaj */ -1,
#endif
/* kqfilter */ ttykqfilter,
};
Static void ucom_cleanup(struct ucom_softc *);
Static int ucomctl(struct ucom_softc *, int, int);
Static int ucomparam(struct tty *, struct termios *);
Static void ucomstart(struct tty *);
Static void ucomstop(struct tty *, int);
Static void ucom_shutdown(struct ucom_softc *);
Static void ucom_dtr(struct ucom_softc *, int);
Static void ucom_rts(struct ucom_softc *, int);
Static void ucom_break(struct ucom_softc *, int);
Static usbd_status ucomstartread(struct ucom_softc *);
Static void ucomreadcb(usbd_xfer_handle, usbd_private_handle, usbd_status);
Static void ucomwritecb(usbd_xfer_handle, usbd_private_handle, usbd_status);
Static void ucomstopread(struct ucom_softc *);
static void disc_optim(struct tty *, struct termios *, struct ucom_softc *);
devclass_t ucom_devclass;
static moduledata_t ucom_mod = {
"ucom",
NULL,
NULL
};
DECLARE_MODULE(ucom, ucom_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE);
MODULE_DEPEND(ucom, usb, 1, 1, 1);
MODULE_VERSION(ucom, UCOM_MODVER);
int
ucom_attach(struct ucom_softc *sc)
{
struct tty *tp;
int unit;
unit = device_get_unit(sc->sc_dev);
sc->sc_tty = tp = ttymalloc(sc->sc_tty);
tp->t_oproc = ucomstart;
tp->t_param = ucomparam;
tp->t_stop = ucomstop;
DPRINTF(("ucom_attach: tty_attach tp = %p\n", tp));
DPRINTF(("ucom_attach: make_dev: ucom%d\n", unit));
sc->dev = make_dev(&ucom_cdevsw, unit | UCOM_CALLOUT_MASK,
UID_UUCP, GID_DIALER, 0660,
"ucom%d", unit);
sc->dev->si_tty = tp;
return (0);
}
int
ucom_detach(struct ucom_softc *sc)
{
struct tty *tp = sc->sc_tty;
int s;
DPRINTF(("ucom_detach: sc = %p, tp = %p\n", sc, sc->sc_tty));
sc->sc_dying = 1;
if (sc->sc_bulkin_pipe != NULL)
usbd_abort_pipe(sc->sc_bulkin_pipe);
if (sc->sc_bulkout_pipe != NULL)
usbd_abort_pipe(sc->sc_bulkout_pipe);
if (tp != NULL) {
if (tp->t_state & TS_ISOPEN) {
device_printf(sc->sc_dev,
"still open, focing close\n");
(*linesw[tp->t_line].l_close)(tp, 0);
tp->t_gen++;
ttyclose(tp);
ttwakeup(tp);
ttwwakeup(tp);
}
} else {
DPRINTF(("ucom_detach: no tty\n"));
return (0);
}
s = splusb();
if (--sc->sc_refcnt >= 0) {
/* Wait for processes to go away. */
usb_detach_wait(USBDEV(sc->sc_dev));
}
splx(s);
destroy_dev(sc->dev);
return (0);
}
Static void
ucom_shutdown(struct ucom_softc *sc)
{
struct tty *tp = sc->sc_tty;
DPRINTF(("ucom_shutdown\n"));
/*
* Hang up if necessary. Wait a bit, so the other side has time to
* notice even if we immediately open the port again.
*/
if (ISSET(tp->t_cflag, HUPCL)) {
(void)ucomctl(sc, TIOCM_DTR, DMBIC);
(void)tsleep(sc, TTIPRI, "ucomsd", hz);
}
}
Static int
ucomopen(dev_t dev, int flag, int mode, usb_proc_ptr p)
{
int unit = UCOMUNIT(dev);
struct ucom_softc *sc;
usbd_status err;
struct tty *tp;
int s;
int error;
USB_GET_SC_OPEN(ucom, unit, sc);
if (sc->sc_dying)
return (ENXIO);
tp = sc->sc_tty;
DPRINTF(("%s: ucomopen: tp = %p\n", USBDEVNAME(sc->sc_dev), tp));
if (ISSET(tp->t_state, TS_ISOPEN) &&
ISSET(tp->t_state, TS_XCLUDE) &&
suser(p))
return (EBUSY);
/*
* Do the following iff this is a first open.
*/
s = spltty();
while (sc->sc_opening)
tsleep(&sc->sc_opening, PRIBIO, "ucomop", 0);
sc->sc_opening = 1;
if (!ISSET(tp->t_state, TS_ISOPEN)) {
struct termios t;
sc->sc_poll = 0;
sc->sc_lsr = sc->sc_msr = sc->sc_mcr = 0;
tp->t_dev = dev;
/*
* Initialize the termios status to the defaults. Add in the
* sticky bits from TIOCSFLAGS.
*/
t.c_ispeed = 0;
t.c_ospeed = TTYDEF_SPEED;
t.c_cflag = TTYDEF_CFLAG;
/* Make sure ucomparam() will do something. */
tp->t_ospeed = 0;
(void)ucomparam(tp, &t);
tp->t_iflag = TTYDEF_IFLAG;
tp->t_oflag = TTYDEF_OFLAG;
tp->t_lflag = TTYDEF_LFLAG;
ttychars(tp);
ttsetwater(tp);
/*
* Turn on DTR. We must always do this, even if carrier is not
* present, because otherwise we'd have to use TIOCSDTR
* immediately after setting CLOCAL, which applications do not
* expect. We always assert DTR while the device is open
* unless explicitly requested to deassert it.
*/
(void)ucomctl(sc, TIOCM_DTR | TIOCM_RTS, DMBIS);
/* Device specific open */
if (sc->sc_callback->ucom_open != NULL) {
error = sc->sc_callback->ucom_open(sc->sc_parent,
sc->sc_portno);
if (error) {
ucom_cleanup(sc);
sc->sc_opening = 0;
wakeup(&sc->sc_opening);
splx(s);
return (error);
}
}
DPRINTF(("ucomopen: open pipes in = %d out = %d\n",
sc->sc_bulkin_no, sc->sc_bulkout_no));
/* Open the bulk pipes */
/* Bulk-in pipe */
err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkin_no, 0,
&sc->sc_bulkin_pipe);
if (err) {
printf("%s: open bulk out error (addr %d): %s\n",
USBDEVNAME(sc->sc_dev), sc->sc_bulkin_no,
usbd_errstr(err));
error = EIO;
goto fail_0;
}
/* Bulk-out pipe */
err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkout_no,
USBD_EXCLUSIVE_USE, &sc->sc_bulkout_pipe);
if (err) {
printf("%s: open bulk in error (addr %d): %s\n",
USBDEVNAME(sc->sc_dev), sc->sc_bulkout_no,
usbd_errstr(err));
error = EIO;
goto fail_1;
}
/* Allocate a request and an input buffer and start reading. */
sc->sc_ixfer = usbd_alloc_xfer(sc->sc_udev);
if (sc->sc_ixfer == NULL) {
error = ENOMEM;
goto fail_2;
}
sc->sc_ibuf = usbd_alloc_buffer(sc->sc_ixfer,
sc->sc_ibufsizepad);
if (sc->sc_ibuf == NULL) {
error = ENOMEM;
goto fail_3;
}
sc->sc_oxfer = usbd_alloc_xfer(sc->sc_udev);
if (sc->sc_oxfer == NULL) {
error = ENOMEM;
goto fail_3;
}
sc->sc_obuf = usbd_alloc_buffer(sc->sc_oxfer,
sc->sc_obufsize +
sc->sc_opkthdrlen);
if (sc->sc_obuf == NULL) {
error = ENOMEM;
goto fail_4;
}
/*
* Handle initial DCD.
*/
if (ISSET(sc->sc_msr, UMSR_DCD) ||
(minor(dev) & UCOM_CALLOUT_MASK))
(*linesw[tp->t_line].l_modem)(tp, 1);
ucomstartread(sc);
}
sc->sc_opening = 0;
wakeup(&sc->sc_opening);
splx(s);
error = ttyopen(dev, tp);
if (error)
goto bad;
error = (*linesw[tp->t_line].l_open)(dev, tp);
if (error)
goto bad;
disc_optim(tp, &tp->t_termios, sc);
DPRINTF(("%s: ucomopen: success\n", USBDEVNAME(sc->sc_dev)));
sc->sc_poll = 1;
sc->sc_refcnt++;
return (0);
fail_4:
usbd_free_xfer(sc->sc_oxfer);
sc->sc_oxfer = NULL;
fail_3:
usbd_free_xfer(sc->sc_ixfer);
sc->sc_ixfer = NULL;
fail_2:
usbd_close_pipe(sc->sc_bulkout_pipe);
sc->sc_bulkout_pipe = NULL;
fail_1:
usbd_close_pipe(sc->sc_bulkin_pipe);
sc->sc_bulkin_pipe = NULL;
fail_0:
sc->sc_opening = 0;
wakeup(&sc->sc_opening);
splx(s);
return (error);
bad:
if (!ISSET(tp->t_state, TS_ISOPEN)) {
/*
* We failed to open the device, and nobody else had it opened.
* Clean up the state as appropriate.
*/
ucom_cleanup(sc);
}
DPRINTF(("%s: ucomopen: failed\n", USBDEVNAME(sc->sc_dev)));
return (error);
}
static int
ucomclose(dev_t dev, int flag, int mode, usb_proc_ptr p)
{
struct ucom_softc *sc;
struct tty *tp;
int s;
USB_GET_SC(ucom, UCOMUNIT(dev), sc);
tp = sc->sc_tty;
DPRINTF(("%s: ucomclose: unit = %d\n",
USBDEVNAME(sc->sc_dev), UCOMUNIT(dev)));
if (!ISSET(tp->t_state, TS_ISOPEN))
goto quit;
s = spltty();
(*linesw[tp->t_line].l_close)(tp, flag);
disc_optim(tp, &tp->t_termios, sc);
ttyclose(tp);
splx(s);
if (sc->sc_dying)
goto quit;
if (!ISSET(tp->t_state, TS_ISOPEN)) {
/*
* Although we got a last close, the device may still be in
* use; e.g. if this was the dialout node, and there are still
* processes waiting for carrier on the non-dialout node.
*/
ucom_cleanup(sc);
}
if (sc->sc_callback->ucom_close != NULL)
sc->sc_callback->ucom_close(sc->sc_parent, sc->sc_portno);
quit:
if (--sc->sc_refcnt < 0)
usb_detach_wakeup(USBDEV(sc->sc_dev));
return (0);
}
static int
ucomread(dev_t dev, struct uio *uio, int flag)
{
struct ucom_softc *sc;
struct tty *tp;
int error;
USB_GET_SC(ucom, UCOMUNIT(dev), sc);
tp = sc->sc_tty;
DPRINTF(("ucomread: tp = %p, flag = 0x%x\n", tp, flag));
if (sc->sc_dying)
return (EIO);
error = (*linesw[tp->t_line].l_read)(tp, uio, flag);
DPRINTF(("ucomread: error = %d\n", error));
return (error);
}
static int
ucomwrite(dev_t dev, struct uio *uio, int flag)
{
struct ucom_softc *sc;
struct tty *tp;
int error;
USB_GET_SC(ucom, UCOMUNIT(dev), sc);
tp = sc->sc_tty;
DPRINTF(("ucomwrite: tp = %p, flag = 0x%x\n", tp, flag));
if (sc->sc_dying)
return (EIO);
error = (*linesw[tp->t_line].l_write)(tp, uio, flag);
DPRINTF(("ucomwrite: error = %d\n", error));
return (error);
}
static int
ucomioctl(dev_t dev, u_long cmd, caddr_t data, int flag, usb_proc_ptr p)
{
struct ucom_softc *sc;
struct tty *tp;
int error;
int s;
int d;
USB_GET_SC(ucom, UCOMUNIT(dev), sc);
tp = sc->sc_tty;
if (sc->sc_dying)
return (EIO);
DPRINTF(("ucomioctl: cmd = 0x%08lx\n", cmd));
error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p);
if (error >= 0) {
DPRINTF(("ucomioctl: l_ioctl: error = %d\n", error));
return (error);
}
error = ttioctl(tp, cmd, data, flag);
disc_optim(tp, &tp->t_termios, sc);
if (error >= 0) {
DPRINTF(("ucomioctl: ttioctl: error = %d\n", error));
return (error);
}
if (sc->sc_callback->ucom_ioctl != NULL) {
error = sc->sc_callback->ucom_ioctl(sc->sc_parent,
sc->sc_portno,
cmd, data, flag, p);
if (error >= 0)
return (error);
}
error = 0;
DPRINTF(("ucomioctl: our cmd = 0x%08lx\n", cmd));
s = spltty();
switch (cmd) {
case TIOCSBRK:
DPRINTF(("ucomioctl: TIOCSBRK\n"));
ucom_break(sc, 1);
break;
case TIOCCBRK:
DPRINTF(("ucomioctl: TIOCCBRK\n"));
ucom_break(sc, 0);
break;
case TIOCSDTR:
DPRINTF(("ucomioctl: TIOCSDTR\n"));
(void)ucomctl(sc, TIOCM_DTR, DMBIS);
break;
case TIOCCDTR:
DPRINTF(("ucomioctl: TIOCCDTR\n"));
(void)ucomctl(sc, TIOCM_DTR, DMBIC);
break;
case TIOCMSET:
d = *(int *)data;
DPRINTF(("ucomioctl: TIOCMSET, 0x%x\n", d));
(void)ucomctl(sc, d, DMSET);
break;
case TIOCMBIS:
d = *(int *)data;
DPRINTF(("ucomioctl: TIOCMBIS, 0x%x\n", d));
(void)ucomctl(sc, d, DMBIS);
break;
case TIOCMBIC:
d = *(int *)data;
DPRINTF(("ucomioctl: TIOCMBIC, 0x%x\n", d));
(void)ucomctl(sc, d, DMBIC);
break;
case TIOCMGET:
d = ucomctl(sc, 0, DMGET);
DPRINTF(("ucomioctl: TIOCMGET, 0x%x\n", d));
*(int *)data = d;
break;
default:
DPRINTF(("ucomioctl: error: our cmd = 0x%08lx\n", cmd));
error = ENOTTY;
break;
}
splx(s);
return (error);
}
Static int
ucomctl(struct ucom_softc *sc, int bits, int how)
{
int mcr;
int msr;
int onoff;
DPRINTF(("ucomctl: bits = 0x%x, how = %d\n", bits, how));
if (how == DMGET) {
SET(bits, TIOCM_LE); /* always set TIOCM_LE bit */
DPRINTF(("ucomctl: DMGET: LE"));
mcr = sc->sc_mcr;
if (ISSET(mcr, UMCR_DTR)) {
SET(bits, TIOCM_DTR);
DPRINTF((" DTR"));
}
if (ISSET(mcr, UMCR_RTS)) {
SET(bits, TIOCM_RTS);
DPRINTF((" RTS"));
}
msr = sc->sc_msr;
if (ISSET(msr, UMSR_CTS)) {
SET(bits, TIOCM_CTS);
DPRINTF((" CTS"));
}
if (ISSET(msr, UMSR_DCD)) {
SET(bits, TIOCM_CD);
DPRINTF((" CD"));
}
if (ISSET(msr, UMSR_DSR)) {
SET(bits, TIOCM_DSR);
DPRINTF((" DSR"));
}
if (ISSET(msr, UMSR_RI)) {
SET(bits, TIOCM_RI);
DPRINTF((" RI"));
}
DPRINTF(("\n"));
return (bits);
}
mcr = 0;
if (ISSET(bits, TIOCM_DTR))
SET(mcr, UMCR_DTR);
if (ISSET(bits, TIOCM_RTS))
SET(mcr, UMCR_RTS);
switch (how) {
case DMSET:
sc->sc_mcr = mcr;
break;
case DMBIS:
sc->sc_mcr |= mcr;
break;
case DMBIC:
sc->sc_mcr &= ~mcr;
break;
}
onoff = ISSET(sc->sc_mcr, UMCR_DTR) ? 1 : 0;
ucom_dtr(sc, onoff);
onoff = ISSET(sc->sc_mcr, UMCR_RTS) ? 1 : 0;
ucom_rts(sc, onoff);
return (0);
}
Static void
ucom_break(struct ucom_softc *sc, int onoff)
{
DPRINTF(("ucom_break: onoff = %d\n", onoff));
if (sc->sc_callback->ucom_set == NULL)
return;
sc->sc_callback->ucom_set(sc->sc_parent, sc->sc_portno,
UCOM_SET_BREAK, onoff);
}
Static void
ucom_dtr(struct ucom_softc *sc, int onoff)
{
DPRINTF(("ucom_dtr: onoff = %d\n", onoff));
if (sc->sc_callback->ucom_set == NULL)
return;
sc->sc_callback->ucom_set(sc->sc_parent, sc->sc_portno,
UCOM_SET_DTR, onoff);
}
Static void
ucom_rts(struct ucom_softc *sc, int onoff)
{
DPRINTF(("ucom_rts: onoff = %d\n", onoff));
if (sc->sc_callback->ucom_set == NULL)
return;
sc->sc_callback->ucom_set(sc->sc_parent, sc->sc_portno,
UCOM_SET_RTS, onoff);
}
void
ucom_status_change(struct ucom_softc *sc)
{
struct tty *tp = sc->sc_tty;
u_char old_msr;
int onoff;
if (sc->sc_callback->ucom_get_status == NULL) {
sc->sc_lsr = 0;
sc->sc_msr = 0;
return;
}
old_msr = sc->sc_msr;
sc->sc_callback->ucom_get_status(sc->sc_parent, sc->sc_portno,
&sc->sc_lsr, &sc->sc_msr);
if (ISSET((sc->sc_msr ^ old_msr), UMSR_DCD)) {
if (sc->sc_poll == 0)
return;
onoff = ISSET(sc->sc_msr, UMSR_DCD) ? 1 : 0;
DPRINTF(("ucom_status_change: DCD changed to %d\n", onoff));
(*linesw[tp->t_line].l_modem)(tp, onoff);
}
}
Static int
ucomparam(struct tty *tp, struct termios *t)
{
struct ucom_softc *sc;
int error;
usbd_status uerr;
USB_GET_SC(ucom, UCOMUNIT(tp->t_dev), sc);
if (sc->sc_dying)
return (EIO);
DPRINTF(("ucomparam: sc = %p\n", sc));
/* Check requested parameters. */
if (t->c_ospeed < 0) {
DPRINTF(("ucomparam: negative ospeed\n"));
return (EINVAL);
}
if (t->c_ispeed && t->c_ispeed != t->c_ospeed) {
DPRINTF(("ucomparam: mismatch ispeed and ospeed\n"));
return (EINVAL);
}
/*
* If there were no changes, don't do anything. This avoids dropping
* input and improves performance when all we did was frob things like
* VMIN and VTIME.
*/
if (tp->t_ospeed == t->c_ospeed &&
tp->t_cflag == t->c_cflag)
return (0);
/* And copy to tty. */
tp->t_ispeed = 0;
tp->t_ospeed = t->c_ospeed;
tp->t_cflag = t->c_cflag;
if (sc->sc_callback->ucom_param == NULL)
return (0);
ucomstopread(sc);
error = sc->sc_callback->ucom_param(sc->sc_parent, sc->sc_portno, t);
if (error) {
DPRINTF(("ucomparam: callback: error = %d\n", error));
return (error);
}
ttsetwater(tp);
if (t->c_cflag & CRTS_IFLOW) {
sc->sc_state |= UCS_RTS_IFLOW;
} else if (sc->sc_state & UCS_RTS_IFLOW) {
sc->sc_state &= ~UCS_RTS_IFLOW;
(void)ucomctl(sc, UMCR_RTS, DMBIS);
}
disc_optim(tp, t, sc);
uerr = ucomstartread(sc);
if (uerr != USBD_NORMAL_COMPLETION)
return (EIO);
return (0);
}
Static void
ucomstart(struct tty *tp)
{
struct ucom_softc *sc;
struct cblock *cbp;
usbd_status err;
int s;
u_char *data;
int cnt;
USB_GET_SC(ucom, UCOMUNIT(tp->t_dev), sc);
DPRINTF(("ucomstart: sc = %p\n", sc));
if (sc->sc_dying)
return;
s = spltty();
if (tp->t_state & TS_TBLOCK) {
if (ISSET(sc->sc_mcr, UMCR_RTS) &&
ISSET(sc->sc_state, UCS_RTS_IFLOW)) {
DPRINTF(("ucomstart: clear RTS\n"));
(void)ucomctl(sc, UMCR_RTS, DMBIC);
}
} else {
if (!ISSET(sc->sc_mcr, UMCR_RTS) &&
tp->t_rawq.c_cc <= tp->t_ilowat &&
ISSET(sc->sc_state, UCS_RTS_IFLOW)) {
DPRINTF(("ucomstart: set RTS\n"));
(void)ucomctl(sc, UMCR_RTS, DMBIS);
}
}
if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) {
ttwwakeup(tp);
DPRINTF(("ucomstart: stopped\n"));
goto out;
}
if (tp->t_outq.c_cc <= tp->t_olowat) {
if (ISSET(tp->t_state, TS_SO_OLOWAT)) {
CLR(tp->t_state, TS_SO_OLOWAT);
wakeup(TSA_OLOWAT(tp));
}
selwakeup(&tp->t_wsel);
if (tp->t_outq.c_cc == 0) {
if (ISSET(tp->t_state, TS_BUSY | TS_SO_OCOMPLETE) ==
TS_SO_OCOMPLETE && tp->t_outq.c_cc == 0) {
CLR(tp->t_state, TS_SO_OCOMPLETE);
wakeup(TSA_OCOMPLETE(tp));
}
goto out;
}
}
/* Grab the first contiguous region of buffer space. */
data = tp->t_outq.c_cf;
cbp = (struct cblock *) ((intptr_t) tp->t_outq.c_cf & ~CROUND);
cnt = min((char *) (cbp+1) - tp->t_outq.c_cf, tp->t_outq.c_cc);
if (cnt == 0) {
DPRINTF(("ucomstart: cnt == 0\n"));
goto out;
}
SET(tp->t_state, TS_BUSY);
if (cnt > sc->sc_obufsize) {
DPRINTF(("ucomstart: big buffer %d chars\n", cnt));
cnt = sc->sc_obufsize;
}
if (sc->sc_callback->ucom_write != NULL)
sc->sc_callback->ucom_write(sc->sc_parent, sc->sc_portno,
sc->sc_obuf, data, &cnt);
else
memcpy(sc->sc_obuf, data, cnt);
DPRINTF(("ucomstart: %d chars\n", cnt));
usbd_setup_xfer(sc->sc_oxfer, sc->sc_bulkout_pipe,
(usbd_private_handle)sc, sc->sc_obuf, cnt,
USBD_NO_COPY, USBD_NO_TIMEOUT, ucomwritecb);
/* What can we do on error? */
err = usbd_transfer(sc->sc_oxfer);
if (err != USBD_IN_PROGRESS)
printf("ucomstart: err=%s\n", usbd_errstr(err));
ttwwakeup(tp);
out:
splx(s);
}
Static void
ucomstop(struct tty *tp, int flag)
{
struct ucom_softc *sc;
int s;
USB_GET_SC(ucom, UCOMUNIT(tp->t_dev), sc);
DPRINTF(("ucomstop: %d\n", flag));
if (flag & FREAD) {
DPRINTF(("ucomstop: read\n"));
ucomstopread(sc);
}
if (flag & FWRITE) {
DPRINTF(("ucomstop: write\n"));
s = spltty();
if (ISSET(tp->t_state, TS_BUSY)) {
/* XXX do what? */
if (!ISSET(tp->t_state, TS_TTSTOP))
SET(tp->t_state, TS_FLUSH);
}
splx(s);
}
DPRINTF(("ucomstop: done\n"));
}
Static void
ucomwritecb(usbd_xfer_handle xfer, usbd_private_handle p, usbd_status status)
{
struct ucom_softc *sc = (struct ucom_softc *)p;
struct tty *tp = sc->sc_tty;
u_int32_t cc;
int s;
DPRINTF(("ucomwritecb: status = %d\n", status));
if (status == USBD_CANCELLED || sc->sc_dying)
goto error;
if (status != USBD_NORMAL_COMPLETION) {
printf("%s: ucomwritecb: %s\n",
USBDEVNAME(sc->sc_dev), usbd_errstr(status));
if (status == USBD_STALLED)
usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe);
/* XXX we should restart after some delay. */
goto error;
}
usbd_get_xfer_status(xfer, NULL, NULL, &cc, NULL);
DPRINTF(("ucomwritecb: cc = %d\n", cc));
/* convert from USB bytes to tty bytes */
cc -= sc->sc_opkthdrlen;
s = spltty();
CLR(tp->t_state, TS_BUSY);
if (ISSET(tp->t_state, TS_FLUSH))
CLR(tp->t_state, TS_FLUSH);
else
ndflush(&tp->t_outq, cc);
(*linesw[tp->t_line].l_start)(tp);
splx(s);
return;
error:
s = spltty();
CLR(tp->t_state, TS_BUSY);
splx(s);
return;
}
Static usbd_status
ucomstartread(struct ucom_softc *sc)
{
usbd_status err;
DPRINTF(("ucomstartread: start\n"));
sc->sc_state &= ~UCS_RXSTOP;
if (sc->sc_bulkin_pipe == NULL)
return (USBD_NORMAL_COMPLETION);
usbd_setup_xfer(sc->sc_ixfer, sc->sc_bulkin_pipe,
(usbd_private_handle)sc,
sc->sc_ibuf, sc->sc_ibufsize,
USBD_SHORT_XFER_OK | USBD_NO_COPY,
USBD_NO_TIMEOUT, ucomreadcb);
err = usbd_transfer(sc->sc_ixfer);
if (err != USBD_IN_PROGRESS) {
DPRINTF(("ucomstartread: err = %s\n", usbd_errstr(err)));
return (err);
}
return (USBD_NORMAL_COMPLETION);
}
Static void
ucomreadcb(usbd_xfer_handle xfer, usbd_private_handle p, usbd_status status)
{
struct ucom_softc *sc = (struct ucom_softc *)p;
struct tty *tp = sc->sc_tty;
int (*rint) (int c, struct tty *tp) = linesw[tp->t_line].l_rint;
usbd_status err;
u_int32_t cc;
u_char *cp;
int lostcc;
int s;
DPRINTF(("ucomreadcb: status = %d\n", status));
if (status != USBD_NORMAL_COMPLETION) {
if (!(sc->sc_state & UCS_RXSTOP))
printf("%s: ucomreadcb: %s\n",
USBDEVNAME(sc->sc_dev), usbd_errstr(status));
if (status == USBD_STALLED)
usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe);
/* XXX we should restart after some delay. */
return;
}
usbd_get_xfer_status(xfer, NULL, (void **)&cp, &cc, NULL);
DPRINTF(("ucomreadcb: got %d chars, tp = %p\n", cc, tp));
if (sc->sc_callback->ucom_read != NULL)
sc->sc_callback->ucom_read(sc->sc_parent, sc->sc_portno,
&cp, &cc);
s = spltty();
if (tp->t_state & TS_CAN_BYPASS_L_RINT) {
if (tp->t_rawq.c_cc + cc > tp->t_ihiwat
&& (sc->sc_state & UCS_RTS_IFLOW
|| tp->t_iflag & IXOFF)
&& !(tp->t_state & TS_TBLOCK))
ttyblock(tp);
lostcc = b_to_q((char *)cp, cc, &tp->t_rawq);
tp->t_rawcc += cc;
ttwakeup(tp);
if (tp->t_state & TS_TTSTOP
&& (tp->t_iflag & IXANY
|| tp->t_cc[VSTART] == tp->t_cc[VSTOP])) {
tp->t_state &= ~TS_TTSTOP;
tp->t_lflag &= ~FLUSHO;
ucomstart(tp);
}
if (lostcc > 0)
printf("%s: lost %d chars\n", USBDEVNAME(sc->sc_dev),
lostcc);
} else {
/* Give characters to tty layer. */
while (cc-- > 0) {
DPRINTFN(7,("ucomreadcb: char = 0x%02x\n", *cp));
if ((*rint)(*cp++, tp) == -1) {
/* XXX what should we do? */
printf("%s: lost %d chars\n",
USBDEVNAME(sc->sc_dev), cc);
break;
}
}
}
splx(s);
err = ucomstartread(sc);
if (err) {
printf("%s: read start failed\n", USBDEVNAME(sc->sc_dev));
/* XXX what should we dow now? */
}
if ((sc->sc_state & UCS_RTS_IFLOW) && !ISSET(sc->sc_mcr, UMCR_RTS)
&& !(tp->t_state & TS_TBLOCK))
ucomctl(sc, UMCR_RTS, DMBIS);
}
Static void
ucom_cleanup(struct ucom_softc *sc)
{
DPRINTF(("ucom_cleanup: closing pipes\n"));
ucom_shutdown(sc);
if (sc->sc_bulkin_pipe != NULL) {
usbd_abort_pipe(sc->sc_bulkin_pipe);
usbd_close_pipe(sc->sc_bulkin_pipe);
sc->sc_bulkin_pipe = NULL;
}
if (sc->sc_bulkout_pipe != NULL) {
usbd_abort_pipe(sc->sc_bulkout_pipe);
usbd_close_pipe(sc->sc_bulkout_pipe);
sc->sc_bulkout_pipe = NULL;
}
if (sc->sc_ixfer != NULL) {
usbd_free_xfer(sc->sc_ixfer);
sc->sc_ixfer = NULL;
}
if (sc->sc_oxfer != NULL) {
usbd_free_xfer(sc->sc_oxfer);
sc->sc_oxfer = NULL;
}
}
Static void
ucomstopread(struct ucom_softc *sc)
{
usbd_status err;
DPRINTF(("ucomstopread: enter\n"));
if (!(sc->sc_state & UCS_RXSTOP)) {
if (sc->sc_bulkin_pipe == NULL) {
DPRINTF(("ucomstopread: bulkin pipe NULL\n"));
return;
}
sc->sc_state |= UCS_RXSTOP;
err = usbd_abort_pipe(sc->sc_bulkin_pipe);
if (err) {
DPRINTF(("ucomstopread: err = %s\n",
usbd_errstr(err)));
}
}
DPRINTF(("ucomstopread: leave\n"));
}
static void
disc_optim(struct tty *tp, struct termios *t, struct ucom_softc *sc)
{
if (!(t->c_iflag & (ICRNL | IGNCR | IMAXBEL | INLCR | ISTRIP | IXON))
&& (!(t->c_iflag & BRKINT) || (t->c_iflag & IGNBRK))
&& (!(t->c_iflag & PARMRK)
|| (t->c_iflag & (IGNPAR | IGNBRK)) == (IGNPAR | IGNBRK))
&& !(t->c_lflag & (ECHO | ICANON | IEXTEN | ISIG | PENDIN))
&& linesw[tp->t_line].l_rint == ttyinput) {
DPRINTF(("disc_optim: bypass l_rint\n"));
tp->t_state |= TS_CAN_BYPASS_L_RINT;
} else {
DPRINTF(("disc_optim: can't bypass l_rint\n"));
tp->t_state &= ~TS_CAN_BYPASS_L_RINT;
}
sc->hotchar = linesw[tp->t_line].l_hotchar;
}
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