2 * $NetBSD: ucom.c,v 1.39 2001/08/16 22:31:24 augustss Exp $
3 * $NetBSD: ucom.c,v 1.40 2001/11/13 06:24:54 lukem Exp $
4 * $FreeBSD: src/sys/dev/usb/ucom.c,v 1.35 2003/11/16 11:58:21 akiyama Exp $
5 * $DragonFly: src/sys/dev/usbmisc/ucom/ucom.c,v 1.32 2007/11/05 19:09:43 hasso Exp $
8 * Copyright (c) 2001-2002, Shunsuke Akiyama <akiyama@jp.FreeBSD.org>.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * Copyright (c) 1998, 2000 The NetBSD Foundation, Inc.
35 * All rights reserved.
37 * This code is derived from software contributed to The NetBSD Foundation
38 * by Lennart Augustsson (lennart@augustsson.net) at
39 * Carlstedt Research & Technology.
41 * Redistribution and use in source and binary forms, with or without
42 * modification, are permitted provided that the following conditions
44 * 1. Redistributions of source code must retain the above copyright
45 * notice, this list of conditions and the following disclaimer.
46 * 2. Redistributions in binary form must reproduce the above copyright
47 * notice, this list of conditions and the following disclaimer in the
48 * documentation and/or other materials provided with the distribution.
49 * 3. All advertising materials mentioning features or use of this software
50 * must display the following acknowledgement:
51 * This product includes software developed by the NetBSD
52 * Foundation, Inc. and its contributors.
53 * 4. Neither the name of The NetBSD Foundation nor the names of its
54 * contributors may be used to endorse or promote products derived
55 * from this software without specific prior written permission.
57 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
58 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
59 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
60 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
61 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
62 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
63 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
64 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
65 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
66 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
67 * POSSIBILITY OF SUCH DAMAGE.
70 #include <sys/param.h>
71 #include <sys/systm.h>
72 #include <sys/kernel.h>
73 #include <sys/malloc.h>
75 #include <sys/fcntl.h>
78 #include <sys/clist.h>
80 #include <sys/select.h>
84 #include <sys/sysctl.h>
85 #include <sys/thread2.h>
87 #include <bus/usb/usb.h>
88 #include <bus/usb/usbcdc.h>
90 #include <bus/usb/usbdi.h>
91 #include <bus/usb/usbdi_util.h>
92 #include <bus/usb/usb_quirks.h>
97 static int ucomdebug = 0;
98 SYSCTL_NODE(_hw_usb, OID_AUTO, ucom, CTLFLAG_RW, 0, "USB ucom");
99 SYSCTL_INT(_hw_usb_ucom, OID_AUTO, debug, CTLFLAG_RW,
100 &ucomdebug, 0, "ucom debug level");
101 #define DPRINTF(x) do { \
106 #define DPRINTFN(n, x) do { \
107 if (ucomdebug > (n)) \
112 #define DPRINTFN(n, x)
115 static d_open_t ucomopen;
116 static d_close_t ucomclose;
117 static d_read_t ucomread;
118 static d_write_t ucomwrite;
119 static d_ioctl_t ucomioctl;
121 #define UCOM_CDEV_MAJOR 138
123 static struct dev_ops ucom_ops = {
124 { "ucom", UCOM_CDEV_MAJOR, D_TTY | D_KQFILTER },
126 .d_close = ucomclose,
128 .d_write = ucomwrite,
129 .d_ioctl = ucomioctl,
131 .d_kqfilter = ttykqfilter,
132 .d_revoke = ttyrevoke
135 static void ucom_cleanup(struct ucom_softc *);
136 static int ucomctl(struct ucom_softc *, int, int);
137 static int ucomparam(struct tty *, struct termios *);
138 static void ucomstart(struct tty *);
139 static void ucomstop(struct tty *, int);
140 static void ucom_shutdown(struct ucom_softc *);
141 static void ucom_dtr(struct ucom_softc *, int);
142 static void ucom_rts(struct ucom_softc *, int);
143 static void ucom_break(struct ucom_softc *, int);
144 static usbd_status ucomstartread(struct ucom_softc *);
145 static void ucomreadcb(usbd_xfer_handle, usbd_private_handle, usbd_status);
146 static void ucomwritecb(usbd_xfer_handle, usbd_private_handle, usbd_status);
147 static void ucomstopread(struct ucom_softc *);
148 static void disc_optim(struct tty *, struct termios *, struct ucom_softc *);
150 devclass_t ucom_devclass;
152 static moduledata_t ucom_mod = {
158 DECLARE_MODULE(ucom, ucom_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE);
159 MODULE_DEPEND(ucom, usb, 1, 1, 1);
160 MODULE_VERSION(ucom, UCOM_MODVER);
163 ucom_attach(struct ucom_softc *sc)
169 unit = device_get_unit(sc->sc_dev);
171 sc->sc_tty = tp = ttymalloc(sc->sc_tty);
172 tp->t_oproc = ucomstart;
173 tp->t_param = ucomparam;
174 tp->t_stop = ucomstop;
176 DPRINTF(("ucom_attach: tty_attach tp = %p\n", tp));
178 DPRINTF(("ucom_attach: make_dev: ucom%d\n", unit));
180 dev_ops_add(&ucom_ops, UCOMUNIT_MASK, unit);
181 dev = make_dev(&ucom_ops, unit | UCOM_CALLOUT_MASK,
182 UID_UUCP, GID_DIALER, 0660,
190 ucom_detach(struct ucom_softc *sc)
192 struct tty *tp = sc->sc_tty;
195 DPRINTF(("ucom_detach: sc = %p, tp = %p\n", sc, sc->sc_tty));
199 if (sc->sc_bulkin_pipe != NULL)
200 usbd_abort_pipe(sc->sc_bulkin_pipe);
201 if (sc->sc_bulkout_pipe != NULL)
202 usbd_abort_pipe(sc->sc_bulkout_pipe);
205 if (tp->t_state & TS_ISOPEN) {
206 device_printf(sc->sc_dev,
207 "still open, forcing close\n");
208 (*linesw[tp->t_line].l_close)(tp, 0);
212 DPRINTF(("ucom_detach: no tty\n"));
217 if (--sc->sc_refcnt >= 0) {
218 /* Wait for processes to go away. */
219 usb_detach_wait(sc->sc_dev);
223 unit = device_get_unit(sc->sc_dev);
224 dev_ops_remove(&ucom_ops, UCOMUNIT_MASK, unit);
230 ucom_shutdown(struct ucom_softc *sc)
232 struct tty *tp = sc->sc_tty;
234 DPRINTF(("ucom_shutdown\n"));
236 * Hang up if necessary. Wait a bit, so the other side has time to
237 * notice even if we immediately open the port again.
239 if (ISSET(tp->t_cflag, HUPCL)) {
240 (void)ucomctl(sc, TIOCM_DTR, DMBIC);
241 (void)tsleep(sc, 0, "ucomsd", hz);
246 ucomopen(struct dev_open_args *ap)
248 cdev_t dev = ap->a_head.a_dev;
249 int unit = UCOMUNIT(dev);
250 struct ucom_softc *sc;
255 sc = devclass_get_softc(ucom_devclass, unit);
264 DPRINTF(("%s: ucomopen: tp = %p\n", device_get_nameunit(sc->sc_dev), tp));
266 if (ISSET(tp->t_state, TS_ISOPEN) &&
267 ISSET(tp->t_state, TS_XCLUDE) &&
268 priv_check_cred(ap->a_cred, PRIV_ROOT, 0)
274 * Do the following iff this is a first open.
277 while (sc->sc_opening)
278 tsleep(&sc->sc_opening, 0, "ucomop", 0);
281 if (!ISSET(tp->t_state, TS_ISOPEN)) {
285 sc->sc_lsr = sc->sc_msr = sc->sc_mcr = 0;
287 tp->t_dev = reference_dev(dev);
290 * Initialize the termios status to the defaults. Add in the
291 * sticky bits from TIOCSFLAGS.
294 t.c_ospeed = TTYDEF_SPEED;
295 t.c_cflag = TTYDEF_CFLAG;
296 /* Make sure ucomparam() will do something. */
298 (void)ucomparam(tp, &t);
299 tp->t_iflag = TTYDEF_IFLAG;
300 tp->t_oflag = TTYDEF_OFLAG;
301 tp->t_lflag = TTYDEF_LFLAG;
306 * Turn on DTR. We must always do this, even if carrier is not
307 * present, because otherwise we'd have to use TIOCSDTR
308 * immediately after setting CLOCAL, which applications do not
309 * expect. We always assert DTR while the device is open
310 * unless explicitly requested to deassert it.
312 (void)ucomctl(sc, TIOCM_DTR | TIOCM_RTS, DMBIS);
314 /* Device specific open */
315 if (sc->sc_callback->ucom_open != NULL) {
316 error = sc->sc_callback->ucom_open(sc->sc_parent,
321 wakeup(&sc->sc_opening);
327 DPRINTF(("ucomopen: open pipes in = %d out = %d\n",
328 sc->sc_bulkin_no, sc->sc_bulkout_no));
330 /* Open the bulk pipes */
332 err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkin_no, 0,
333 &sc->sc_bulkin_pipe);
335 kprintf("%s: open bulk in error (addr %d): %s\n",
336 device_get_nameunit(sc->sc_dev), sc->sc_bulkin_no,
342 err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkout_no,
343 USBD_EXCLUSIVE_USE, &sc->sc_bulkout_pipe);
345 kprintf("%s: open bulk out error (addr %d): %s\n",
346 device_get_nameunit(sc->sc_dev), sc->sc_bulkout_no,
352 /* Allocate a request and an input buffer and start reading. */
353 sc->sc_ixfer = usbd_alloc_xfer(sc->sc_udev);
354 if (sc->sc_ixfer == NULL) {
359 sc->sc_ibuf = usbd_alloc_buffer(sc->sc_ixfer,
361 if (sc->sc_ibuf == NULL) {
366 sc->sc_oxfer = usbd_alloc_xfer(sc->sc_udev);
367 if (sc->sc_oxfer == NULL) {
372 sc->sc_obuf = usbd_alloc_buffer(sc->sc_oxfer,
375 if (sc->sc_obuf == NULL) {
381 * Handle initial DCD.
383 if (ISSET(sc->sc_msr, UMSR_DCD) ||
384 (minor(dev) & UCOM_CALLOUT_MASK))
385 (*linesw[tp->t_line].l_modem)(tp, 1);
391 wakeup(&sc->sc_opening);
394 error = ttyopen(dev, tp);
398 error = (*linesw[tp->t_line].l_open)(dev, tp);
402 disc_optim(tp, &tp->t_termios, sc);
404 DPRINTF(("%s: ucomopen: success\n", device_get_nameunit(sc->sc_dev)));
412 usbd_free_xfer(sc->sc_oxfer);
415 usbd_free_xfer(sc->sc_ixfer);
418 usbd_close_pipe(sc->sc_bulkout_pipe);
419 sc->sc_bulkout_pipe = NULL;
421 usbd_close_pipe(sc->sc_bulkin_pipe);
422 sc->sc_bulkin_pipe = NULL;
425 wakeup(&sc->sc_opening);
430 if (!ISSET(tp->t_state, TS_ISOPEN)) {
432 * We failed to open the device, and nobody else had it opened.
433 * Clean up the state as appropriate.
438 DPRINTF(("%s: ucomopen: failed\n", device_get_nameunit(sc->sc_dev)));
444 ucomclose(struct dev_close_args *ap)
446 cdev_t dev = ap->a_head.a_dev;
447 struct ucom_softc *sc;
450 sc = devclass_get_softc(ucom_devclass, UCOMUNIT(dev));
454 DPRINTF(("%s: ucomclose: unit = %d\n",
455 device_get_nameunit(sc->sc_dev), UCOMUNIT(dev)));
457 if (!ISSET(tp->t_state, TS_ISOPEN))
461 (*linesw[tp->t_line].l_close)(tp, ap->a_fflag);
462 disc_optim(tp, &tp->t_termios, sc);
469 if (!ISSET(tp->t_state, TS_ISOPEN)) {
471 * Although we got a last close, the device may still be in
472 * use; e.g. if this was the dialout node, and there are still
473 * processes waiting for carrier on the non-dialout node.
478 if (sc->sc_callback->ucom_close != NULL)
479 sc->sc_callback->ucom_close(sc->sc_parent, sc->sc_portno);
483 release_dev(tp->t_dev);
487 if (--sc->sc_refcnt < 0)
488 usb_detach_wakeup(sc->sc_dev);
494 ucomread(struct dev_read_args *ap)
496 cdev_t dev = ap->a_head.a_dev;
497 struct ucom_softc *sc;
501 sc = devclass_get_softc(ucom_devclass, UCOMUNIT(dev));
504 DPRINTF(("ucomread: tp = %p, flag = 0x%x\n", tp, ap->a_ioflag));
509 error = (*linesw[tp->t_line].l_read)(tp, ap->a_uio, ap->a_ioflag);
511 DPRINTF(("ucomread: error = %d\n", error));
517 ucomwrite(struct dev_write_args *ap)
519 cdev_t dev = ap->a_head.a_dev;
520 struct ucom_softc *sc;
524 sc = devclass_get_softc(ucom_devclass, UCOMUNIT(dev));
527 DPRINTF(("ucomwrite: tp = %p, flag = 0x%x\n", tp, ap->a_ioflag));
532 error = (*linesw[tp->t_line].l_write)(tp, ap->a_uio, ap->a_ioflag);
534 DPRINTF(("ucomwrite: error = %d\n", error));
540 ucomioctl(struct dev_ioctl_args *ap)
542 cdev_t dev = ap->a_head.a_dev;
543 struct ucom_softc *sc;
548 sc = devclass_get_softc(ucom_devclass, UCOMUNIT(dev));
554 DPRINTF(("ucomioctl: cmd = 0x%08lx\n", ap->a_cmd));
556 error = (*linesw[tp->t_line].l_ioctl)(tp, ap->a_cmd, ap->a_data,
557 ap->a_fflag, ap->a_cred);
558 if (error != ENOIOCTL) {
559 DPRINTF(("ucomioctl: l_ioctl: error = %d\n", error));
565 error = ttioctl(tp, ap->a_cmd, ap->a_data, ap->a_fflag);
566 disc_optim(tp, &tp->t_termios, sc);
567 if (error != ENOIOCTL) {
569 DPRINTF(("ucomioctl: ttioctl: error = %d\n", error));
573 if (sc->sc_callback->ucom_ioctl != NULL) {
574 error = sc->sc_callback->ucom_ioctl(sc->sc_parent,
576 ap->a_cmd, ap->a_data,
577 ap->a_fflag, curthread);
586 DPRINTF(("ucomioctl: our cmd = 0x%08lx\n", ap->a_cmd));
590 DPRINTF(("ucomioctl: TIOCSBRK\n"));
594 DPRINTF(("ucomioctl: TIOCCBRK\n"));
599 DPRINTF(("ucomioctl: TIOCSDTR\n"));
600 (void)ucomctl(sc, TIOCM_DTR, DMBIS);
603 DPRINTF(("ucomioctl: TIOCCDTR\n"));
604 (void)ucomctl(sc, TIOCM_DTR, DMBIC);
608 d = *(int *)ap->a_data;
609 DPRINTF(("ucomioctl: TIOCMSET, 0x%x\n", d));
610 (void)ucomctl(sc, d, DMSET);
613 d = *(int *)ap->a_data;
614 DPRINTF(("ucomioctl: TIOCMBIS, 0x%x\n", d));
615 (void)ucomctl(sc, d, DMBIS);
618 d = *(int *)ap->a_data;
619 DPRINTF(("ucomioctl: TIOCMBIC, 0x%x\n", d));
620 (void)ucomctl(sc, d, DMBIC);
623 d = ucomctl(sc, 0, DMGET);
624 DPRINTF(("ucomioctl: TIOCMGET, 0x%x\n", d));
625 *(int *)ap->a_data = d;
629 DPRINTF(("ucomioctl: error: our cmd = 0x%08lx\n", ap->a_cmd));
640 ucomctl(struct ucom_softc *sc, int bits, int how)
646 DPRINTF(("ucomctl: bits = 0x%x, how = %d\n", bits, how));
649 SET(bits, TIOCM_LE); /* always set TIOCM_LE bit */
650 DPRINTF(("ucomctl: DMGET: LE"));
653 if (ISSET(mcr, UMCR_DTR)) {
654 SET(bits, TIOCM_DTR);
657 if (ISSET(mcr, UMCR_RTS)) {
658 SET(bits, TIOCM_RTS);
663 if (ISSET(msr, UMSR_CTS)) {
664 SET(bits, TIOCM_CTS);
667 if (ISSET(msr, UMSR_DCD)) {
671 if (ISSET(msr, UMSR_DSR)) {
672 SET(bits, TIOCM_DSR);
675 if (ISSET(msr, UMSR_RI)) {
686 if (ISSET(bits, TIOCM_DTR))
688 if (ISSET(bits, TIOCM_RTS))
703 onoff = ISSET(sc->sc_mcr, UMCR_DTR) ? 1 : 0;
706 onoff = ISSET(sc->sc_mcr, UMCR_RTS) ? 1 : 0;
713 ucom_break(struct ucom_softc *sc, int onoff)
715 DPRINTF(("ucom_break: onoff = %d\n", onoff));
717 if (sc->sc_callback->ucom_set == NULL)
719 sc->sc_callback->ucom_set(sc->sc_parent, sc->sc_portno,
720 UCOM_SET_BREAK, onoff);
724 ucom_dtr(struct ucom_softc *sc, int onoff)
726 DPRINTF(("ucom_dtr: onoff = %d\n", onoff));
728 if (sc->sc_callback->ucom_set == NULL)
730 sc->sc_callback->ucom_set(sc->sc_parent, sc->sc_portno,
731 UCOM_SET_DTR, onoff);
735 ucom_rts(struct ucom_softc *sc, int onoff)
737 DPRINTF(("ucom_rts: onoff = %d\n", onoff));
739 if (sc->sc_callback->ucom_set == NULL)
741 sc->sc_callback->ucom_set(sc->sc_parent, sc->sc_portno,
742 UCOM_SET_RTS, onoff);
746 ucom_status_change(struct ucom_softc *sc)
748 struct tty *tp = sc->sc_tty;
752 if (sc->sc_callback->ucom_get_status == NULL) {
758 old_msr = sc->sc_msr;
759 sc->sc_callback->ucom_get_status(sc->sc_parent, sc->sc_portno,
760 &sc->sc_lsr, &sc->sc_msr);
761 if (ISSET((sc->sc_msr ^ old_msr), UMSR_DCD)) {
762 if (sc->sc_poll == 0)
764 onoff = ISSET(sc->sc_msr, UMSR_DCD) ? 1 : 0;
765 DPRINTF(("ucom_status_change: DCD changed to %d\n", onoff));
766 (*linesw[tp->t_line].l_modem)(tp, onoff);
771 ucomparam(struct tty *tp, struct termios *t)
773 struct ucom_softc *sc;
777 sc = devclass_get_softc(ucom_devclass, UCOMUNIT(tp->t_dev));
782 DPRINTF(("ucomparam: sc = %p\n", sc));
784 /* Check requested parameters. */
785 if (t->c_ospeed < 0) {
786 DPRINTF(("ucomparam: negative ospeed\n"));
789 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) {
790 DPRINTF(("ucomparam: mismatch ispeed and ospeed\n"));
795 * If there were no changes, don't do anything. This avoids dropping
796 * input and improves performance when all we did was frob things like
799 if (tp->t_ospeed == t->c_ospeed &&
800 tp->t_cflag == t->c_cflag)
803 /* And copy to tty. */
805 tp->t_ospeed = t->c_ospeed;
806 tp->t_cflag = t->c_cflag;
808 if (sc->sc_callback->ucom_param == NULL)
813 error = sc->sc_callback->ucom_param(sc->sc_parent, sc->sc_portno, t);
815 DPRINTF(("ucomparam: callback: error = %d\n", error));
821 if (t->c_cflag & CRTS_IFLOW) {
822 sc->sc_state |= UCS_RTS_IFLOW;
823 } else if (sc->sc_state & UCS_RTS_IFLOW) {
824 sc->sc_state &= ~UCS_RTS_IFLOW;
825 (void)ucomctl(sc, UMCR_RTS, DMBIS);
828 disc_optim(tp, t, sc);
830 uerr = ucomstartread(sc);
831 if (uerr != USBD_NORMAL_COMPLETION)
838 ucomstart(struct tty *tp)
840 struct ucom_softc *sc;
846 sc = devclass_get_softc(ucom_devclass, UCOMUNIT(tp->t_dev));
847 DPRINTF(("ucomstart: sc = %p\n", sc));
854 if (tp->t_state & TS_TBLOCK) {
855 if (ISSET(sc->sc_mcr, UMCR_RTS) &&
856 ISSET(sc->sc_state, UCS_RTS_IFLOW)) {
857 DPRINTF(("ucomstart: clear RTS\n"));
858 (void)ucomctl(sc, UMCR_RTS, DMBIC);
861 if (!ISSET(sc->sc_mcr, UMCR_RTS) &&
862 tp->t_rawq.c_cc <= tp->t_ilowat &&
863 ISSET(sc->sc_state, UCS_RTS_IFLOW)) {
864 DPRINTF(("ucomstart: set RTS\n"));
865 (void)ucomctl(sc, UMCR_RTS, DMBIS);
869 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) {
871 DPRINTF(("ucomstart: stopped\n"));
875 if (tp->t_outq.c_cc <= tp->t_olowat) {
876 if (ISSET(tp->t_state, TS_SO_OLOWAT)) {
877 CLR(tp->t_state, TS_SO_OLOWAT);
878 wakeup(TSA_OLOWAT(tp));
880 selwakeup(&tp->t_wsel);
881 if (tp->t_outq.c_cc == 0) {
882 if (ISSET(tp->t_state, TS_BUSY | TS_SO_OCOMPLETE) ==
883 TS_SO_OCOMPLETE && tp->t_outq.c_cc == 0) {
884 CLR(tp->t_state, TS_SO_OCOMPLETE);
885 wakeup(TSA_OCOMPLETE(tp));
891 /* Grab the first contiguous region of buffer space. */
892 data = tp->t_outq.c_cf;
893 cbp = (struct cblock *) ((intptr_t) tp->t_outq.c_cf & ~CROUND);
894 cnt = min((char *) (cbp+1) - tp->t_outq.c_cf, tp->t_outq.c_cc);
897 DPRINTF(("ucomstart: cnt == 0\n"));
901 SET(tp->t_state, TS_BUSY);
903 if (cnt > sc->sc_obufsize) {
904 DPRINTF(("ucomstart: big buffer %d chars\n", cnt));
905 cnt = sc->sc_obufsize;
907 if (sc->sc_callback->ucom_write != NULL)
908 sc->sc_callback->ucom_write(sc->sc_parent, sc->sc_portno,
909 sc->sc_obuf, data, &cnt);
911 memcpy(sc->sc_obuf, data, cnt);
913 DPRINTF(("ucomstart: %d chars\n", cnt));
914 usbd_setup_xfer(sc->sc_oxfer, sc->sc_bulkout_pipe,
915 (usbd_private_handle)sc, sc->sc_obuf, cnt,
916 USBD_NO_COPY, USBD_NO_TIMEOUT, ucomwritecb);
917 /* What can we do on error? */
918 err = usbd_transfer(sc->sc_oxfer);
919 if (err != USBD_IN_PROGRESS)
920 kprintf("ucomstart: err=%s\n", usbd_errstr(err));
929 ucomstop(struct tty *tp, int flag)
931 struct ucom_softc *sc;
933 sc = devclass_get_softc(ucom_devclass, UCOMUNIT(tp->t_dev));
935 DPRINTF(("ucomstop: %d\n", flag));
939 * This is just supposed to flush pending receive data,
940 * not stop the reception of data entirely!
942 DPRINTF(("ucomstop: read\n"));
948 DPRINTF(("ucomstop: write\n"));
950 if (ISSET(tp->t_state, TS_BUSY)) {
952 if (!ISSET(tp->t_state, TS_TTSTOP))
953 SET(tp->t_state, TS_FLUSH);
958 DPRINTF(("ucomstop: done\n"));
962 ucomwritecb(usbd_xfer_handle xfer, usbd_private_handle p, usbd_status status)
964 struct ucom_softc *sc = (struct ucom_softc *)p;
965 struct tty *tp = sc->sc_tty;
968 DPRINTF(("ucomwritecb: status = %d\n", status));
970 if (status == USBD_CANCELLED || sc->sc_dying)
973 if (status != USBD_NORMAL_COMPLETION) {
974 kprintf("%s: ucomwritecb: %s\n",
975 device_get_nameunit(sc->sc_dev), usbd_errstr(status));
976 if (status == USBD_STALLED)
977 usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe);
979 * XXX. We may need a flag to sequence ucomstopread() and
980 * ucomstartread() to handle the case where ucomstartread()
981 * is called after ucomstopread() but before the request has
982 * been properly canceled?
987 usbd_get_xfer_status(xfer, NULL, NULL, &cc, NULL);
988 DPRINTF(("ucomwritecb: cc = %d\n", cc));
989 if (cc <= sc->sc_opkthdrlen) {
990 kprintf("%s: sent size too small, cc = %d\n",
991 device_get_nameunit(sc->sc_dev), cc);
995 /* convert from USB bytes to tty bytes */
996 cc -= sc->sc_opkthdrlen;
999 CLR(tp->t_state, TS_BUSY);
1000 if (ISSET(tp->t_state, TS_FLUSH))
1001 CLR(tp->t_state, TS_FLUSH);
1003 ndflush(&tp->t_outq, cc);
1004 (*linesw[tp->t_line].l_start)(tp);
1011 CLR(tp->t_state, TS_BUSY);
1017 ucomstartread(struct ucom_softc *sc)
1021 DPRINTF(("ucomstartread: start\n"));
1023 sc->sc_state &= ~UCS_RXSTOP;
1025 if (sc->sc_bulkin_pipe == NULL)
1026 return (USBD_NORMAL_COMPLETION);
1028 usbd_setup_xfer(sc->sc_ixfer, sc->sc_bulkin_pipe,
1029 (usbd_private_handle)sc,
1030 sc->sc_ibuf, sc->sc_ibufsize,
1031 USBD_SHORT_XFER_OK | USBD_NO_COPY,
1032 USBD_NO_TIMEOUT, ucomreadcb);
1034 err = usbd_transfer(sc->sc_ixfer);
1035 if (err != USBD_IN_PROGRESS) {
1036 DPRINTF(("ucomstartread: err = %s\n", usbd_errstr(err)));
1040 return (USBD_NORMAL_COMPLETION);
1044 ucomreadcb(usbd_xfer_handle xfer, usbd_private_handle p, usbd_status status)
1046 struct ucom_softc *sc = (struct ucom_softc *)p;
1047 struct tty *tp = sc->sc_tty;
1048 int (*rint) (int c, struct tty *tp) = linesw[tp->t_line].l_rint;
1054 DPRINTF(("ucomreadcb: status = %d\n", status));
1056 if (status != USBD_NORMAL_COMPLETION) {
1057 if (!(sc->sc_state & UCS_RXSTOP))
1058 kprintf("%s: ucomreadcb: %s\n",
1059 device_get_nameunit(sc->sc_dev), usbd_errstr(status));
1060 if (status == USBD_STALLED)
1061 usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe);
1062 /* XXX we should restart after some delay. */
1066 usbd_get_xfer_status(xfer, NULL, (void **)&cp, &cc, NULL);
1067 DPRINTF(("ucomreadcb: got %d chars, tp = %p\n", cc, tp));
1071 if (sc->sc_callback->ucom_read != NULL) {
1072 sc->sc_callback->ucom_read(sc->sc_parent, sc->sc_portno,
1076 if (cc > sc->sc_ibufsize) {
1077 kprintf("%s: invalid receive data size, %d chars\n",
1078 device_get_nameunit(sc->sc_dev), cc);
1085 if (tp->t_state & TS_CAN_BYPASS_L_RINT) {
1086 if (tp->t_rawq.c_cc + cc > tp->t_ihiwat
1087 && (sc->sc_state & UCS_RTS_IFLOW
1088 || tp->t_iflag & IXOFF)
1089 && !(tp->t_state & TS_TBLOCK))
1091 lostcc = b_to_q((char *)cp, cc, &tp->t_rawq);
1095 if (*cp == sc->hotchar)
1104 if (tp->t_state & TS_TTSTOP
1105 && (tp->t_iflag & IXANY
1106 || tp->t_cc[VSTART] == tp->t_cc[VSTOP])) {
1107 tp->t_state &= ~TS_TTSTOP;
1108 tp->t_lflag &= ~FLUSHO;
1112 kprintf("%s: lost %d chars\n", device_get_nameunit(sc->sc_dev),
1115 /* Give characters to tty layer. */
1117 DPRINTFN(7, ("ucomreadcb: char = 0x%02x\n", *cp));
1118 if ((*rint)(*cp, tp) == -1) {
1119 /* XXX what should we do? */
1120 kprintf("%s: lost %d chars\n",
1121 device_get_nameunit(sc->sc_dev), cc);
1131 err = ucomstartread(sc);
1133 kprintf("%s: read start failed\n", device_get_nameunit(sc->sc_dev));
1134 /* XXX what should we dow now? */
1137 if ((sc->sc_state & UCS_RTS_IFLOW) && !ISSET(sc->sc_mcr, UMCR_RTS)
1138 && !(tp->t_state & TS_TBLOCK))
1139 ucomctl(sc, UMCR_RTS, DMBIS);
1143 ucom_cleanup(struct ucom_softc *sc)
1145 DPRINTF(("ucom_cleanup: closing pipes\n"));
1148 if (sc->sc_bulkin_pipe != NULL) {
1149 usbd_abort_pipe(sc->sc_bulkin_pipe);
1150 usbd_close_pipe(sc->sc_bulkin_pipe);
1151 sc->sc_bulkin_pipe = NULL;
1153 if (sc->sc_bulkout_pipe != NULL) {
1154 usbd_abort_pipe(sc->sc_bulkout_pipe);
1155 usbd_close_pipe(sc->sc_bulkout_pipe);
1156 sc->sc_bulkout_pipe = NULL;
1158 if (sc->sc_ixfer != NULL) {
1159 usbd_free_xfer(sc->sc_ixfer);
1160 sc->sc_ixfer = NULL;
1162 if (sc->sc_oxfer != NULL) {
1163 usbd_free_xfer(sc->sc_oxfer);
1164 sc->sc_oxfer = NULL;
1169 ucomstopread(struct ucom_softc *sc)
1173 DPRINTF(("ucomstopread: enter\n"));
1175 if (!(sc->sc_state & UCS_RXSTOP)) {
1176 sc->sc_state |= UCS_RXSTOP;
1177 if (sc->sc_bulkin_pipe == NULL) {
1178 DPRINTF(("ucomstopread: bulkin pipe NULL\n"));
1181 err = usbd_abort_pipe(sc->sc_bulkin_pipe);
1183 DPRINTF(("ucomstopread: err = %s\n",
1188 DPRINTF(("ucomstopread: leave\n"));
1192 disc_optim(struct tty *tp, struct termios *t, struct ucom_softc *sc)
1194 if (!(t->c_iflag & (ICRNL | IGNCR | IMAXBEL | INLCR | ISTRIP | IXON))
1195 && (!(t->c_iflag & BRKINT) || (t->c_iflag & IGNBRK))
1196 && (!(t->c_iflag & PARMRK)
1197 || (t->c_iflag & (IGNPAR | IGNBRK)) == (IGNPAR | IGNBRK))
1198 && !(t->c_lflag & (ECHO | ICANON | IEXTEN | ISIG | PENDIN))
1199 && linesw[tp->t_line].l_rint == ttyinput) {
1200 DPRINTF(("disc_optim: bypass l_rint\n"));
1201 tp->t_state |= TS_CAN_BYPASS_L_RINT;
1203 DPRINTF(("disc_optim: can't bypass l_rint\n"));
1204 tp->t_state &= ~TS_CAN_BYPASS_L_RINT;
1206 sc->hotchar = linesw[tp->t_line].l_hotchar;