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cafee33353
freebsd/sys/dev/usb/ucom.c
John Baldwin 44731cab3b Change the suser() API to take advantage of td_ucred as well as do a 
general cleanup of the API.  The entire API now consists of two functions
similar to the pre-KSE API.  The suser() function takes a thread pointer
as its only argument.  The td_ucred member of this thread must be valid
so the only valid thread pointers are curthread and a few kernel threads
such as thread0.  The suser_cred() function takes a pointer to a struct
ucred as its first argument and an integer flag as its second argument.
The flag is currently only used for the PRISON_ROOT flag.

Discussed on:	smp@
2002-04-01 21:31:13 +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 <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 UCOM_DEBUG
#include <sys/sysctl.h>
static int ucomdebug = 1;
SYSCTL_NODE(_debug, OID_AUTO, usb, CTLFLAG_RW, 0, "USB debugging");
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 */ "usio",
/* maj */ UCOM_CDEV_MAJOR,
/* dump */ nodump,
/* psize */ nopsize,
/* flags */ D_TTY | D_KQFILTER,
/* 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_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: usio%d\n", unit));
sc->dev = make_dev(&ucom_cdevsw, unit | UCOM_CALLOUT_MASK,
UID_UUCP, GID_DIALER, 0660,
"usio%d", unit);
sc->dev->si_tty = tp;
return (0);
}
int
ucom_detach(struct ucom_softc *sc)
{
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 (sc->sc_tty == NULL) {
DPRINTF(("ucom_detach: no tty\n"));
return (0);
}
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 (EIO);
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;
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))
return (0);
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)
return (0);
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);
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);
}
}
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)
{
if (!(sc->sc_state & UCS_RXSTOP)) {
if (sc->sc_bulkin_pipe == NULL)
return;
sc->sc_state |= UCS_RXSTOP;
usbd_abort_pipe(sc->sc_bulkin_pipe);
}
}
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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