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NetBSD/sys/dev/usb/ucom.c

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/* $NetBSD: ucom.c,v 1.76 2008/04/28 20:23:59 martin Exp $ */
/*
* 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.
*
* 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.
*/
/*
* This code is very heavily based on the 16550 driver, com.c.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ucom.c,v 1.76 2008/04/28 20:23:59 martin Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/ioctl.h>
#include <sys/conf.h>
#include <sys/tty.h>
#include <sys/file.h>
#include <sys/select.h>
#include <sys/proc.h>
#include <sys/vnode.h>
#include <sys/device.h>
#include <sys/poll.h>
#include <sys/kauth.h>
#if defined(__NetBSD__)
#include "rnd.h"
#if NRND > 0
#include <sys/rnd.h>
#endif
#endif
#include <dev/usb/usb.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>
#include "ucom.h"
#include "locators.h"
#if NUCOM > 0
#ifdef UCOM_DEBUG
#define DPRINTFN(n, x) if (ucomdebug > (n)) logprintf x
int ucomdebug = 0;
#else
#define DPRINTFN(n, x)
#endif
#define DPRINTF(x) DPRINTFN(0, x)
#define UCOMUNIT_MASK 0x3ffff
#define UCOMDIALOUT_MASK 0x80000
#define UCOMCALLUNIT_MASK 0x40000
#define UCOMUNIT(x) (minor(x) & UCOMUNIT_MASK)
#define UCOMDIALOUT(x) (minor(x) & UCOMDIALOUT_MASK)
#define UCOMCALLUNIT(x) (minor(x) & UCOMCALLUNIT_MASK)
struct ucom_softc {
USBBASEDEVICE sc_dev; /* base device */
usbd_device_handle sc_udev; /* USB device */
usbd_interface_handle sc_iface; /* data interface */
int sc_bulkin_no; /* bulk in endpoint address */
usbd_pipe_handle sc_bulkin_pipe; /* bulk in pipe */
usbd_xfer_handle sc_ixfer; /* read request */
u_char *sc_ibuf; /* read buffer */
u_int sc_ibufsize; /* read buffer size */
u_int sc_ibufsizepad; /* read buffer size padded */
int sc_bulkout_no; /* bulk out endpoint address */
usbd_pipe_handle sc_bulkout_pipe;/* bulk out pipe */
usbd_xfer_handle sc_oxfer; /* write request */
u_char *sc_obuf; /* write buffer */
u_int sc_obufsize; /* write buffer size */
u_int sc_opkthdrlen; /* header length of
* output packet */
struct ucom_methods *sc_methods;
void *sc_parent;
int sc_portno;
struct tty *sc_tty; /* our tty */
u_char sc_lsr;
u_char sc_msr;
u_char sc_mcr;
u_char sc_tx_stopped;
int sc_swflags;
u_char sc_opening; /* lock during open */
int sc_refcnt;
u_char sc_dying; /* disconnecting */
#if defined(__NetBSD__) && NRND > 0
rndsource_element_t sc_rndsource; /* random source */
#endif
};
dev_type_open(ucomopen);
dev_type_close(ucomclose);
dev_type_read(ucomread);
dev_type_write(ucomwrite);
dev_type_ioctl(ucomioctl);
dev_type_stop(ucomstop);
dev_type_tty(ucomtty);
dev_type_poll(ucompoll);
const struct cdevsw ucom_cdevsw = {
ucomopen, ucomclose, ucomread, ucomwrite, ucomioctl,
ucomstop, ucomtty, ucompoll, nommap, ttykqfilter, D_TTY
};
Static void ucom_cleanup(struct ucom_softc *);
Static void ucom_hwiflow(struct ucom_softc *);
Static int ucomparam(struct tty *, struct termios *);
Static void ucomstart(struct tty *);
Static void ucom_shutdown(struct ucom_softc *);
Static int ucom_do_ioctl(struct ucom_softc *, u_long, void *,
int, struct lwp *);
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 tiocm_to_ucom(struct ucom_softc *, u_long, int);
Static int ucom_to_tiocm(struct ucom_softc *);
USB_DECLARE_DRIVER(ucom);
USB_MATCH(ucom)
{
return (1);
}
USB_ATTACH(ucom)
{
struct ucom_softc *sc = (struct ucom_softc *)self;
struct ucom_attach_args *uca = aux;
struct tty *tp;
if (uca->info != NULL)
printf(": %s", uca->info);
printf("\n");
sc->sc_udev = uca->device;
sc->sc_iface = uca->iface;
sc->sc_bulkout_no = uca->bulkout;
sc->sc_bulkin_no = uca->bulkin;
sc->sc_ibufsize = uca->ibufsize;
sc->sc_ibufsizepad = uca->ibufsizepad;
sc->sc_obufsize = uca->obufsize;
sc->sc_opkthdrlen = uca->opkthdrlen;
sc->sc_methods = uca->methods;
sc->sc_parent = uca->arg;
sc->sc_portno = uca->portno;
tp = ttymalloc();
tp->t_oproc = ucomstart;
tp->t_param = ucomparam;
sc->sc_tty = tp;
DPRINTF(("ucom_attach: tty_attach %p\n", tp));
tty_attach(tp);
#if defined(__NetBSD__) && NRND > 0
rnd_attach_source(&sc->sc_rndsource, USBDEVNAME(sc->sc_dev),
RND_TYPE_TTY, 0);
#endif
if (!pmf_device_register(self, NULL, NULL))
aprint_error_dev(self, "couldn't establish power handler\n");
USB_ATTACH_SUCCESS_RETURN;
}
USB_DETACH(ucom)
{
struct ucom_softc *sc = (struct ucom_softc *)self;
struct tty *tp = sc->sc_tty;
int maj, mn;
int s;
DPRINTF(("ucom_detach: sc=%p flags=%d tp=%p, pipe=%d,%d\n",
sc, flags, tp, sc->sc_bulkin_no, sc->sc_bulkout_no));
sc->sc_dying = 1;
pmf_device_deregister(self);
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);
s = splusb();
if (--sc->sc_refcnt >= 0) {
/* Wake up anyone waiting */
if (tp != NULL) {
mutex_spin_enter(&tty_lock);
CLR(tp->t_state, TS_CARR_ON);
CLR(tp->t_cflag, CLOCAL | MDMBUF);
ttyflush(tp, FREAD|FWRITE);
mutex_spin_exit(&tty_lock);
}
/* Wait for processes to go away. */
usb_detach_wait(USBDEV(sc->sc_dev));
}
splx(s);
/* locate the major number */
maj = cdevsw_lookup_major(&ucom_cdevsw);
/* Nuke the vnodes for any open instances. */
mn = device_unit(self);
DPRINTF(("ucom_detach: maj=%d mn=%d\n", maj, mn));
vdevgone(maj, mn, mn, VCHR);
vdevgone(maj, mn | UCOMDIALOUT_MASK, mn | UCOMDIALOUT_MASK, VCHR);
vdevgone(maj, mn | UCOMCALLUNIT_MASK, mn | UCOMCALLUNIT_MASK, VCHR);
/* Detach and free the tty. */
if (tp != NULL) {
tty_detach(tp);
ttyfree(tp);
sc->sc_tty = NULL;
}
/* Detach the random source */
#if defined(__NetBSD__) && NRND > 0
rnd_detach_source(&sc->sc_rndsource);
#endif
return (0);
}
int
ucom_activate(device_ptr_t self, enum devact act)
{
struct ucom_softc *sc = (struct ucom_softc *)self;
DPRINTFN(5,("ucom_activate: %d\n", act));
switch (act) {
case DVACT_ACTIVATE:
return (EOPNOTSUPP);
case DVACT_DEACTIVATE:
sc->sc_dying = 1;
break;
}
return (0);
}
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)) {
ucom_dtr(sc, 0);
(void)tsleep(sc, TTIPRI, ttclos, hz);
}
}
int
ucomopen(dev_t dev, int flag, int mode, struct lwp *l)
{
int unit = UCOMUNIT(dev);
usbd_status err;
struct ucom_softc *sc;
struct tty *tp;
int s;
int error;
if (unit >= ucom_cd.cd_ndevs)
return (ENXIO);
sc = ucom_cd.cd_devs[unit];
if (sc == NULL)
return (ENXIO);
if (sc->sc_dying)
return (EIO);
if (!device_is_active(&sc->sc_dev))
return (ENXIO);
tp = sc->sc_tty;
DPRINTF(("ucomopen: unit=%d, tp=%p\n", unit, tp));
if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp))
return (EBUSY);
s = spltty();
/*
* Do the following iff this is a first open.
*/
while (sc->sc_opening)
tsleep(&sc->sc_opening, PRIBIO, "ucomop", 0);
if (sc->sc_dying) {
splx(s);
return (EIO);
}
sc->sc_opening = 1;
if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) {
struct termios t;
tp->t_dev = dev;
if (sc->sc_methods->ucom_open != NULL) {
error = sc->sc_methods->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);
}
}
ucom_status_change(sc);
/*
* 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;
if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL))
SET(t.c_cflag, CLOCAL);
if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS))
SET(t.c_cflag, CRTSCTS);
if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF))
SET(t.c_cflag, MDMBUF);
/* 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. Ditto RTS.
*/
ucom_dtr(sc, 1);
ucom_rts(sc, 1);
/* XXX CLR(sc->sc_rx_flags, RX_ANY_BLOCK);*/
ucom_hwiflow(sc);
DPRINTF(("ucomopen: open pipes in=%d out=%d\n",
sc->sc_bulkin_no, sc->sc_bulkout_no));
/* Open the bulk pipes */
err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkin_no, 0,
&sc->sc_bulkin_pipe);
if (err) {
DPRINTF(("%s: open bulk in error (addr %d), err=%s\n",
USBDEVNAME(sc->sc_dev), sc->sc_bulkin_no,
usbd_errstr(err)));
error = EIO;
goto fail_0;
}
err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkout_no,
USBD_EXCLUSIVE_USE, &sc->sc_bulkout_pipe);
if (err) {
DPRINTF(("%s: open bulk out error (addr %d), err=%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;
}
ucomstartread(sc);
}
sc->sc_opening = 0;
wakeup(&sc->sc_opening);
splx(s);
error = ttyopen(tp, UCOMDIALOUT(dev), ISSET(flag, O_NONBLOCK));
if (error)
goto bad;
error = (*tp->t_linesw->l_open)(dev, tp);
if (error)
goto bad;
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) && tp->t_wopen == 0) {
/*
* We failed to open the device, and nobody else had it opened.
* Clean up the state as appropriate.
*/
ucom_cleanup(sc);
}
return (error);
}
int
ucomclose(dev_t dev, int flag, int mode, struct lwp *l)
{
struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)];
struct tty *tp = sc->sc_tty;
DPRINTF(("ucomclose: unit=%d\n", UCOMUNIT(dev)));
if (!ISSET(tp->t_state, TS_ISOPEN))
return (0);
sc->sc_refcnt++;
(*tp->t_linesw->l_close)(tp, flag);
ttyclose(tp);
if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) {
/*
* 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_methods->ucom_close != NULL)
sc->sc_methods->ucom_close(sc->sc_parent, sc->sc_portno);
if (--sc->sc_refcnt < 0)
usb_detach_wakeup(USBDEV(sc->sc_dev));
return (0);
}
int
ucomread(dev_t dev, struct uio *uio, int flag)
{
struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)];
struct tty *tp = sc->sc_tty;
int error;
if (sc->sc_dying)
return (EIO);
sc->sc_refcnt++;
error = ((*tp->t_linesw->l_read)(tp, uio, flag));
if (--sc->sc_refcnt < 0)
usb_detach_wakeup(USBDEV(sc->sc_dev));
return (error);
}
int
ucomwrite(dev_t dev, struct uio *uio, int flag)
{
struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)];
struct tty *tp = sc->sc_tty;
int error;
if (sc->sc_dying)
return (EIO);
sc->sc_refcnt++;
error = ((*tp->t_linesw->l_write)(tp, uio, flag));
if (--sc->sc_refcnt < 0)
usb_detach_wakeup(USBDEV(sc->sc_dev));
return (error);
}
int
ucompoll(dev_t dev, int events, struct lwp *l)
{
struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)];
struct tty *tp = sc->sc_tty;
int revents;
if (sc->sc_dying)
return (POLLHUP);
sc->sc_refcnt++;
revents = ((*tp->t_linesw->l_poll)(tp, events, l));
if (--sc->sc_refcnt < 0)
usb_detach_wakeup(USBDEV(sc->sc_dev));
return (revents);
}
struct tty *
ucomtty(dev_t dev)
{
struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)];
struct tty *tp = sc->sc_tty;
return (tp);
}
int
ucomioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l)
{
struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)];
int error;
sc->sc_refcnt++;
error = ucom_do_ioctl(sc, cmd, data, flag, l);
if (--sc->sc_refcnt < 0)
usb_detach_wakeup(USBDEV(sc->sc_dev));
return (error);
}
Static int
ucom_do_ioctl(struct ucom_softc *sc, u_long cmd, void *data,
int flag, struct lwp *l)
{
struct tty *tp = sc->sc_tty;
int error;
int s;
if (sc->sc_dying)
return (EIO);
DPRINTF(("ucomioctl: cmd=0x%08lx\n", cmd));
error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l);
if (error != EPASSTHROUGH)
return (error);
error = ttioctl(tp, cmd, data, flag, l);
if (error != EPASSTHROUGH)
return (error);
if (sc->sc_methods->ucom_ioctl != NULL) {
error = sc->sc_methods->ucom_ioctl(sc->sc_parent,
sc->sc_portno, cmd, data, flag, l->l_proc);
if (error != EPASSTHROUGH)
return (error);
}
error = 0;
DPRINTF(("ucomioctl: our cmd=0x%08lx\n", cmd));
s = spltty();
switch (cmd) {
case TIOCSBRK:
ucom_break(sc, 1);
break;
case TIOCCBRK:
ucom_break(sc, 0);
break;
case TIOCSDTR:
ucom_dtr(sc, 1);
break;
case TIOCCDTR:
ucom_dtr(sc, 0);
break;
case TIOCGFLAGS:
*(int *)data = sc->sc_swflags;
break;
case TIOCSFLAGS:
error = kauth_authorize_device_tty(l->l_cred,
KAUTH_DEVICE_TTY_PRIVSET, tp);
if (error)
break;
sc->sc_swflags = *(int *)data;
break;
case TIOCMSET:
case TIOCMBIS:
case TIOCMBIC:
tiocm_to_ucom(sc, cmd, *(int *)data);
break;
case TIOCMGET:
*(int *)data = ucom_to_tiocm(sc);
break;
default:
error = EPASSTHROUGH;
break;
}
splx(s);
return (error);
}
Static void
tiocm_to_ucom(struct ucom_softc *sc, u_long how, int ttybits)
{
u_char combits;
combits = 0;
if (ISSET(ttybits, TIOCM_DTR))
SET(combits, UMCR_DTR);
if (ISSET(ttybits, TIOCM_RTS))
SET(combits, UMCR_RTS);
switch (how) {
case TIOCMBIC:
CLR(sc->sc_mcr, combits);
break;
case TIOCMBIS:
SET(sc->sc_mcr, combits);
break;
case TIOCMSET:
CLR(sc->sc_mcr, UMCR_DTR | UMCR_RTS);
SET(sc->sc_mcr, combits);
break;
}
if (how == TIOCMSET || ISSET(combits, UMCR_DTR))
ucom_dtr(sc, (sc->sc_mcr & UMCR_DTR) != 0);
if (how == TIOCMSET || ISSET(combits, UMCR_RTS))
ucom_rts(sc, (sc->sc_mcr & UMCR_RTS) != 0);
}
Static int
ucom_to_tiocm(struct ucom_softc *sc)
{
u_char combits;
int ttybits = 0;
combits = sc->sc_mcr;
if (ISSET(combits, UMCR_DTR))
SET(ttybits, TIOCM_DTR);
if (ISSET(combits, UMCR_RTS))
SET(ttybits, TIOCM_RTS);
combits = sc->sc_msr;
if (ISSET(combits, UMSR_DCD))
SET(ttybits, TIOCM_CD);
if (ISSET(combits, UMSR_CTS))
SET(ttybits, TIOCM_CTS);
if (ISSET(combits, UMSR_DSR))
SET(ttybits, TIOCM_DSR);
if (ISSET(combits, UMSR_RI | UMSR_TERI))
SET(ttybits, TIOCM_RI);
#if 0
XXX;
if (sc->sc_ier != 0)
SET(ttybits, TIOCM_LE);
#endif
return (ttybits);
}
Static void
ucom_break(sc, onoff)
struct ucom_softc *sc;
int onoff;
{
DPRINTF(("ucom_break: onoff=%d\n", onoff));
if (sc->sc_methods->ucom_set != NULL)
sc->sc_methods->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_methods->ucom_set != NULL)
sc->sc_methods->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_methods->ucom_set != NULL)
sc->sc_methods->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;
if (sc->sc_methods->ucom_get_status != NULL) {
old_msr = sc->sc_msr;
sc->sc_methods->ucom_get_status(sc->sc_parent, sc->sc_portno,
&sc->sc_lsr, &sc->sc_msr);
if (ISSET((sc->sc_msr ^ old_msr), UMSR_DCD))
(*tp->t_linesw->l_modem)(tp,
ISSET(sc->sc_msr, UMSR_DCD));
} else {
sc->sc_lsr = 0;
/* Assume DCD is present, if we have no chance to check it. */
sc->sc_msr = UMSR_DCD;
}
}
Static int
ucomparam(struct tty *tp, struct termios *t)
{
struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(tp->t_dev)];
int error;
if (sc->sc_dying)
return (EIO);
/* Check requested parameters. */
if (t->c_ispeed && t->c_ispeed != t->c_ospeed)
return (EINVAL);
/*
* For the console, always force CLOCAL and !HUPCL, so that the port
* is always active.
*/
if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR)) {
SET(t->c_cflag, CLOCAL);
CLR(t->c_cflag, HUPCL);
}
/*
* 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);
/* XXX lcr = ISSET(sc->sc_lcr, LCR_SBREAK) | cflag2lcr(t->c_cflag); */
/* And copy to tty. */
tp->t_ispeed = 0;
tp->t_ospeed = t->c_ospeed;
tp->t_cflag = t->c_cflag;
if (sc->sc_methods->ucom_param != NULL) {
error = sc->sc_methods->ucom_param(sc->sc_parent, sc->sc_portno,
t);
if (error)
return (error);
}
/* XXX worry about CHWFLOW */
/*
* Update the tty layer's idea of the carrier bit, in case we changed
* CLOCAL or MDMBUF. We don't hang up here; we only do that by
* explicit request.
*/
DPRINTF(("ucomparam: l_modem\n"));
(void) (*tp->t_linesw->l_modem)(tp, ISSET(sc->sc_msr, UMSR_DCD));
#if 0
XXX what if the hardware is not open
if (!ISSET(t->c_cflag, CHWFLOW)) {
if (sc->sc_tx_stopped) {
sc->sc_tx_stopped = 0;
ucomstart(tp);
}
}
#endif
return (0);
}
/*
* (un)block input via hw flowcontrol
*/
Static void
ucom_hwiflow(struct ucom_softc *sc)
{
DPRINTF(("ucom_hwiflow:\n"));
#if 0
XXX
bus_space_tag_t iot = sc->sc_iot;
bus_space_handle_t ioh = sc->sc_ioh;
if (sc->sc_mcr_rts == 0)
return;
if (ISSET(sc->sc_rx_flags, RX_ANY_BLOCK)) {
CLR(sc->sc_mcr, sc->sc_mcr_rts);
CLR(sc->sc_mcr_active, sc->sc_mcr_rts);
} else {
SET(sc->sc_mcr, sc->sc_mcr_rts);
SET(sc->sc_mcr_active, sc->sc_mcr_rts);
}
bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr_active);
#endif
}
Static void
ucomstart(struct tty *tp)
{
struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(tp->t_dev)];
usbd_status err;
int s;
u_char *data;
int cnt;
if (sc->sc_dying)
return;
s = spltty();
if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) {
DPRINTFN(4,("ucomstart: no go, state=0x%x\n", tp->t_state));
goto out;
}
if (sc->sc_tx_stopped)
goto out;
if (!ttypull(tp))
goto out;
/* Grab the first contiguous region of buffer space. */
data = tp->t_outq.c_cf;
cnt = ndqb(&tp->t_outq, 0);
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_methods->ucom_write != NULL)
sc->sc_methods->ucom_write(sc->sc_parent, sc->sc_portno,
sc->sc_obuf, data, &cnt);
else
memcpy(sc->sc_obuf, data, cnt);
DPRINTFN(4,("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);
#ifdef DIAGNOSTIC
if (err != USBD_IN_PROGRESS)
printf("ucomstart: err=%s\n", usbd_errstr(err));
#endif
out:
splx(s);
}
void
ucomstop(struct tty *tp, int flag)
{
DPRINTF(("ucomstop: flag=%d\n", flag));
#if 0
/*struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(tp->t_dev)];*/
int s;
s = spltty();
if (ISSET(tp->t_state, TS_BUSY)) {
DPRINTF(("ucomstop: XXX\n"));
/* sc->sc_tx_stopped = 1; */
if (!ISSET(tp->t_state, TS_TTSTOP))
SET(tp->t_state, TS_FLUSH);
}
splx(s);
#endif
}
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;
DPRINTFN(5,("ucomwritecb: status=%d\n", status));
if (status == USBD_CANCELLED || sc->sc_dying)
goto error;
if (status) {
DPRINTF(("ucomwritecb: status=%d\n", status));
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);
#if defined(__NetBSD__) && NRND > 0
rnd_add_uint32(&sc->sc_rndsource, cc);
#endif
DPRINTFN(5,("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);
(*tp->t_linesw->l_start)(tp);
splx(s);
return;
error:
s = spltty();
CLR(tp->t_state, TS_BUSY);
splx(s);
}
Static usbd_status
ucomstartread(struct ucom_softc *sc)
{
usbd_status err;
DPRINTFN(5,("ucomstartread: start\n"));
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, struct tty *) = tp->t_linesw->l_rint;
usbd_status err;
u_int32_t cc;
u_char *cp;
int s;
DPRINTFN(5,("ucomreadcb: status=%d\n", status));
if (status == USBD_CANCELLED || status == USBD_IOERROR ||
sc->sc_dying) {
DPRINTF(("ucomreadcb: dying\n"));
/* Send something to wake upper layer */
s = spltty();
(*rint)('\n', tp);
mutex_spin_enter(&tty_lock); /* XXX */
ttwakeup(tp);
mutex_spin_exit(&tty_lock); /* XXX */
splx(s);
return;
}
if (status) {
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);
#if defined(__NetBSD__) && NRND > 0
rnd_add_uint32(&sc->sc_rndsource, cc);
#endif
DPRINTFN(5,("ucomreadcb: got %d chars, tp=%p\n", cc, tp));
if (sc->sc_methods->ucom_read != NULL)
sc->sc_methods->ucom_read(sc->sc_parent, sc->sc_portno,
&cp, &cc);
s = spltty();
/* 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? */
aprint_error_dev(&sc->sc_dev, "lost %d chars\n",
cc);
break;
}
}
splx(s);
err = ucomstartread(sc);
if (err) {
aprint_error_dev(&sc->sc_dev, "read start failed\n");
/* XXX what should we dow now? */
}
}
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;
}
}
#endif /* NUCOM > 0 */
int
ucomprint(void *aux, const char *pnp)
{
struct ucom_attach_args *uca = aux;
if (pnp)
aprint_normal("ucom at %s", pnp);
if (uca->portno != UCOM_UNK_PORTNO)
aprint_normal(" portno %d", uca->portno);
return (UNCONF);
}
int
ucomsubmatch(struct device *parent, struct cfdata *cf,
const int *ldesc, void *aux)
{
struct ucom_attach_args *uca = aux;
if (uca->portno != UCOM_UNK_PORTNO &&
cf->cf_loc[UCOMBUSCF_PORTNO] != UCOMBUSCF_PORTNO_DEFAULT &&
cf->cf_loc[UCOMBUSCF_PORTNO] != uca->portno)
return (0);
return (config_match(parent, cf, aux));
}
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