freebsd-nq/sys/dev/usb/ucom.c
Christian Brueffer 578e607926 Remove compat ifdefs for version < 500014 from the rest of the USB files.
Approved by:	rwatson (mentor)
MFC after:	1 week
2007-06-07 09:29:37 +00:00

860 lines
20 KiB
C

/* $NetBSD: ucom.c,v 1.40 2001/11/13 06:24:54 lukem Exp $ */
/*-
* Copyright (c) 2001-2003, 2005 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*-
* 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.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <sys/ioccom.h>
#include <sys/fcntl.h>
#include <sys/conf.h>
#include <sys/serial.h>
#include <sys/tty.h>
#include <sys/clist.h>
#include <sys/file.h>
#include <sys/selinfo.h>
#include <sys/proc.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 "usbdevs.h"
#include <dev/usb/usb_quirks.h>
#include <dev/usb/ucomvar.h>
#ifdef USB_DEBUG
static int ucomdebug = 0;
SYSCTL_NODE(_hw_usb, OID_AUTO, ucom, CTLFLAG_RW, 0, "USB ucom");
SYSCTL_INT(_hw_usb_ucom, OID_AUTO, debug, 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 void ucom_cleanup(struct ucom_softc *);
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 ucombreak(struct tty *, 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 t_open_t ucomopen;
static t_close_t ucomclose;
static t_modem_t ucommodem;
static t_ioctl_t ucomioctl;
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 = ttyalloc();
tp->t_sc = sc;
tp->t_oproc = ucomstart;
tp->t_param = ucomparam;
tp->t_stop = ucomstop;
tp->t_break = ucombreak;
tp->t_open = ucomopen;
tp->t_close = ucomclose;
tp->t_modem = ucommodem;
tp->t_ioctl = ucomioctl;
DPRINTF(("ucom_attach: tty_attach tp = %p\n", tp));
ttycreate(tp, TS_CALLOUT, "U%d", unit);
DPRINTF(("ucom_attach: ttycreate: ttyU%d\n", unit));
return (0);
}
int
ucom_detach(struct ucom_softc *sc)
{
int s;
DPRINTF(("ucom_detach: sc = %p, tp = %p\n", sc, sc->sc_tty));
sc->sc_dying = 1;
ttygone(sc->sc_tty);
if (sc->sc_tty->t_state & TS_ISOPEN)
ucomclose(sc->sc_tty);
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);
ttyfree(sc->sc_tty);
s = splusb();
splx(s);
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)ucommodem(tp, 0, SER_DTR);
(void)tsleep(sc, TTIPRI, "ucomsd", hz);
}
}
static int
ucomopen(struct tty *tp, struct cdev *dev)
{
struct ucom_softc *sc;
usbd_status err;
int error;
sc = tp->t_sc;
if (sc->sc_dying)
return (ENXIO);
DPRINTF(("%s: ucomopen: tp = %p\n", device_get_nameunit(sc->sc_dev), tp));
sc->sc_poll = 0;
sc->sc_lsr = sc->sc_msr = sc->sc_mcr = 0;
(void)ucommodem(tp, SER_DTR | SER_RTS, 0);
/* 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);
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 in error (addr %d): %s\n",
device_get_nameunit(sc->sc_dev), sc->sc_bulkin_no,
usbd_errstr(err));
error = EIO;
goto fail;
}
/* 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 out error (addr %d): %s\n",
device_get_nameunit(sc->sc_dev), sc->sc_bulkout_no,
usbd_errstr(err));
error = EIO;
goto fail;
}
/* 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;
}
sc->sc_ibuf = usbd_alloc_buffer(sc->sc_ixfer,
sc->sc_ibufsizepad);
if (sc->sc_ibuf == NULL) {
error = ENOMEM;
goto fail;
}
sc->sc_oxfer = usbd_alloc_xfer(sc->sc_udev);
if (sc->sc_oxfer == NULL) {
error = ENOMEM;
goto fail;
}
sc->sc_obuf = usbd_alloc_buffer(sc->sc_oxfer,
sc->sc_obufsize +
sc->sc_opkthdrlen);
if (sc->sc_obuf == NULL) {
error = ENOMEM;
goto fail;
}
sc->sc_state |= UCS_RXSTOP;
ucomstartread(sc);
sc->sc_poll = 1;
return (0);
fail:
ucom_cleanup(sc);
return (error);
}
static void
ucomclose(struct tty *tp)
{
struct ucom_softc *sc;
sc = tp->t_sc;
DPRINTF(("%s: ucomclose \n", device_get_nameunit(sc->sc_dev)));
ucom_cleanup(sc);
if (sc->sc_callback->ucom_close != NULL)
sc->sc_callback->ucom_close(sc->sc_parent, sc->sc_portno);
}
static int
ucomioctl(struct tty *tp, u_long cmd, void *data, int flag, usb_proc_ptr p)
{
struct ucom_softc *sc;
int error;
sc = tp->t_sc;;
if (sc->sc_dying)
return (EIO);
DPRINTF(("ucomioctl: cmd = 0x%08lx\n", cmd));
error = ENOTTY;
if (sc->sc_callback->ucom_ioctl != NULL)
error = sc->sc_callback->ucom_ioctl(sc->sc_parent,
sc->sc_portno,
cmd, data, flag, p);
return (error);
}
static int
ucommodem(struct tty *tp, int sigon, int sigoff)
{
struct ucom_softc *sc;
int mcr;
int msr;
int onoff;
sc = tp->t_sc;
if (sigon == 0 && sigoff == 0) {
mcr = sc->sc_mcr;
if (ISSET(mcr, SER_DTR))
sigon |= SER_DTR;
if (ISSET(mcr, SER_RTS))
sigon |= SER_RTS;
msr = sc->sc_msr;
if (ISSET(msr, SER_CTS))
sigon |= SER_CTS;
if (ISSET(msr, SER_DCD))
sigon |= SER_DCD;
if (ISSET(msr, SER_DSR))
sigon |= SER_DSR;
if (ISSET(msr, SER_RI))
sigon |= SER_RI;
return (sigon);
}
mcr = sc->sc_mcr;
if (ISSET(sigon, SER_DTR))
mcr |= SER_DTR;
if (ISSET(sigoff, SER_DTR))
mcr &= ~SER_DTR;
if (ISSET(sigon, SER_RTS))
mcr |= SER_RTS;
if (ISSET(sigoff, SER_RTS))
mcr &= ~SER_RTS;
sc->sc_mcr = mcr;
onoff = ISSET(sc->sc_mcr, SER_DTR) ? 1 : 0;
ucom_dtr(sc, onoff);
onoff = ISSET(sc->sc_mcr, SER_RTS) ? 1 : 0;
ucom_rts(sc, onoff);
return (0);
}
static void
ucombreak(struct tty *tp, int onoff)
{
struct ucom_softc *sc;
sc = tp->t_sc;
DPRINTF(("ucombreak: 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), SER_DCD)) {
if (sc->sc_poll == 0)
return;
onoff = ISSET(sc->sc_msr, SER_DCD) ? 1 : 0;
DPRINTF(("ucom_status_change: DCD changed to %d\n", onoff));
ttyld_modem(tp, onoff);
}
}
static int
ucomparam(struct tty *tp, struct termios *t)
{
struct ucom_softc *sc;
int error;
usbd_status uerr;
sc = tp->t_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)ucommodem(tp, SER_RTS, 0);
}
ttyldoptim(tp);
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;
sc = tp->t_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, SER_RTS) &&
ISSET(sc->sc_state, UCS_RTS_IFLOW)) {
DPRINTF(("ucomstart: clear RTS\n"));
(void)ucommodem(tp, 0, SER_RTS);
}
} else {
if (!ISSET(sc->sc_mcr, SER_RTS) &&
tp->t_rawq.c_cc <= tp->t_ilowat &&
ISSET(sc->sc_state, UCS_RTS_IFLOW)) {
DPRINTF(("ucomstart: set RTS\n"));
(void)ucommodem(tp, SER_RTS, 0);
}
}
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));
}
selwakeuppri(&tp->t_wsel, TTIPRI);
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;
sc = tp->t_sc;
DPRINTF(("ucomstop: %d\n", flag));
if ((flag & FREAD) && (sc->sc_state & UCS_RXSTOP) == 0) {
DPRINTF(("ucomstop: read\n"));
ucomstopread(sc);
ucomstartread(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);
}
ucomstart(tp);
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",
device_get_nameunit(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));
if (cc <= sc->sc_opkthdrlen) {
printf("%s: sent size too small, cc = %d\n",
device_get_nameunit(sc->sc_dev), cc);
goto error;
}
/* 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);
ttyld_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"));
if (sc->sc_bulkin_pipe == NULL || (sc->sc_state & UCS_RXSTOP) == 0)
return (USBD_NORMAL_COMPLETION);
sc->sc_state &= ~UCS_RXSTOP;
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 && err != USBD_IN_PROGRESS) {
sc->sc_state |= UCS_RXSTOP;
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;
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",
device_get_nameunit(sc->sc_dev), usbd_errstr(status));
sc->sc_state |= UCS_RXSTOP;
if (status == USBD_STALLED)
usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe);
/* XXX we should restart after some delay. */
return;
}
sc->sc_state |= UCS_RXSTOP;
usbd_get_xfer_status(xfer, NULL, (void **)&cp, &cc, NULL);
DPRINTF(("ucomreadcb: got %d chars, tp = %p\n", cc, tp));
if (cc == 0)
goto resubmit;
if (sc->sc_callback->ucom_read != NULL)
sc->sc_callback->ucom_read(sc->sc_parent, sc->sc_portno,
&cp, &cc);
if (cc > sc->sc_ibufsize) {
printf("%s: invalid receive data size, %d chars\n",
device_get_nameunit(sc->sc_dev), cc);
goto resubmit;
}
if (cc < 1)
goto resubmit;
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", device_get_nameunit(sc->sc_dev),
lostcc);
} else {
/* Give characters to tty layer. */
while (cc > 0) {
DPRINTFN(7, ("ucomreadcb: char = 0x%02x\n", *cp));
if (ttyld_rint(tp, *cp) == -1) {
/* XXX what should we do? */
printf("%s: lost %d chars\n",
device_get_nameunit(sc->sc_dev), cc);
break;
}
cc--;
cp++;
}
}
splx(s);
resubmit:
err = ucomstartread(sc);
if (err) {
printf("%s: read start failed\n", device_get_nameunit(sc->sc_dev));
/* XXX what should we dow now? */
}
if ((sc->sc_state & UCS_RTS_IFLOW) && !ISSET(sc->sc_mcr, SER_RTS)
&& !(tp->t_state & TS_TBLOCK))
ucommodem(tp, SER_RTS, 0);
}
static void
ucom_cleanup(struct ucom_softc *sc)
{
DPRINTF(("ucom_cleanup: closing pipes\n"));
ucom_shutdown(sc);
if (sc->sc_bulkin_pipe != NULL) {
sc->sc_state |= UCS_RXSTOP;
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)) {
sc->sc_state |= UCS_RXSTOP;
if (sc->sc_bulkin_pipe == NULL) {
DPRINTF(("ucomstopread: bulkin pipe NULL\n"));
return;
}
err = usbd_abort_pipe(sc->sc_bulkin_pipe);
if (err) {
DPRINTF(("ucomstopread: err = %s\n",
usbd_errstr(err)));
}
}
DPRINTF(("ucomstopread: leave\n"));
}