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 1.28 2007/07/03 19:28:16 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/ioccom.h>
76 #include <sys/fcntl.h>
79 #include <sys/clist.h>
81 #include <sys/select.h>
83 #include <sys/vnode.h>
85 #include <sys/sysctl.h>
86 #include <sys/thread2.h>
88 #include <bus/usb/usb.h>
89 #include <bus/usb/usbcdc.h>
91 #include <bus/usb/usbdi.h>
92 #include <bus/usb/usbdi_util.h>
93 #include <bus/usb/usbdevs.h>
94 #include <bus/usb/usb_quirks.h>
99 static int ucomdebug = 0;
100 SYSCTL_NODE(_hw_usb, OID_AUTO, ucom, CTLFLAG_RW, 0, "USB ucom");
101 SYSCTL_INT(_hw_usb_ucom, OID_AUTO, debug, CTLFLAG_RW,
102 &ucomdebug, 0, "ucom debug level");
103 #define DPRINTF(x) do { \
108 #define DPRINTFN(n, x) do { \
109 if (ucomdebug > (n)) \
114 #define DPRINTFN(n, x)
117 static d_open_t ucomopen;
118 static d_close_t ucomclose;
119 static d_read_t ucomread;
120 static d_write_t ucomwrite;
121 static d_ioctl_t ucomioctl;
123 #define UCOM_CDEV_MAJOR 138
125 static struct dev_ops ucom_ops = {
126 { "ucom", UCOM_CDEV_MAJOR, D_TTY | D_KQFILTER },
128 .d_close = ucomclose,
130 .d_write = ucomwrite,
131 .d_ioctl = ucomioctl,
133 .d_kqfilter = ttykqfilter
136 static void ucom_cleanup(struct ucom_softc *);
137 static int ucomctl(struct ucom_softc *, int, int);
138 static int ucomparam(struct tty *, struct termios *);
139 static void ucomstart(struct tty *);
140 static void ucomstop(struct tty *, int);
141 static void ucom_shutdown(struct ucom_softc *);
142 static void ucom_dtr(struct ucom_softc *, int);
143 static void ucom_rts(struct ucom_softc *, int);
144 static void ucom_break(struct ucom_softc *, int);
145 static usbd_status ucomstartread(struct ucom_softc *);
146 static void ucomreadcb(usbd_xfer_handle, usbd_private_handle, usbd_status);
147 static void ucomwritecb(usbd_xfer_handle, usbd_private_handle, usbd_status);
148 static void ucomstopread(struct ucom_softc *);
149 static void disc_optim(struct tty *, struct termios *, struct ucom_softc *);
151 devclass_t ucom_devclass;
153 static moduledata_t ucom_mod = {
159 DECLARE_MODULE(ucom, ucom_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE);
160 MODULE_DEPEND(ucom, usb, 1, 1, 1);
161 MODULE_VERSION(ucom, UCOM_MODVER);
164 ucom_attach(struct ucom_softc *sc)
170 unit = device_get_unit(sc->sc_dev);
172 sc->sc_tty = tp = ttymalloc(sc->sc_tty);
173 tp->t_oproc = ucomstart;
174 tp->t_param = ucomparam;
175 tp->t_stop = ucomstop;
177 DPRINTF(("ucom_attach: tty_attach tp = %p\n", tp));
179 DPRINTF(("ucom_attach: make_dev: ucom%d\n", unit));
181 dev_ops_add(&ucom_ops, UCOMUNIT_MASK, unit);
182 dev = make_dev(&ucom_ops, unit | UCOM_CALLOUT_MASK,
183 UID_UUCP, GID_DIALER, 0660,
191 ucom_detach(struct ucom_softc *sc)
193 struct tty *tp = sc->sc_tty;
196 DPRINTF(("ucom_detach: sc = %p, tp = %p\n", sc, sc->sc_tty));
200 if (sc->sc_bulkin_pipe != NULL)
201 usbd_abort_pipe(sc->sc_bulkin_pipe);
202 if (sc->sc_bulkout_pipe != NULL)
203 usbd_abort_pipe(sc->sc_bulkout_pipe);
206 if (tp->t_state & TS_ISOPEN) {
207 device_printf(sc->sc_dev,
208 "still open, forcing close\n");
209 (*linesw[tp->t_line].l_close)(tp, 0);
216 DPRINTF(("ucom_detach: no tty\n"));
221 if (--sc->sc_refcnt >= 0) {
222 /* Wait for processes to go away. */
223 usb_detach_wait(sc->sc_dev);
227 unit = device_get_unit(sc->sc_dev);
228 dev_ops_remove(&ucom_ops, UCOMUNIT_MASK, unit);
234 ucom_shutdown(struct ucom_softc *sc)
236 struct tty *tp = sc->sc_tty;
238 DPRINTF(("ucom_shutdown\n"));
240 * Hang up if necessary. Wait a bit, so the other side has time to
241 * notice even if we immediately open the port again.
243 if (ISSET(tp->t_cflag, HUPCL)) {
244 (void)ucomctl(sc, TIOCM_DTR, DMBIC);
245 (void)tsleep(sc, 0, "ucomsd", hz);
250 ucomopen(struct dev_open_args *ap)
252 cdev_t dev = ap->a_head.a_dev;
253 int unit = UCOMUNIT(dev);
254 struct ucom_softc *sc;
259 sc = devclass_get_softc(ucom_devclass, unit);
268 DPRINTF(("%s: ucomopen: tp = %p\n", device_get_nameunit(sc->sc_dev), tp));
270 if (ISSET(tp->t_state, TS_ISOPEN) &&
271 ISSET(tp->t_state, TS_XCLUDE) &&
272 suser_cred(ap->a_cred, 0)
278 * Do the following iff this is a first open.
281 while (sc->sc_opening)
282 tsleep(&sc->sc_opening, 0, "ucomop", 0);
285 if (!ISSET(tp->t_state, TS_ISOPEN)) {
289 sc->sc_lsr = sc->sc_msr = sc->sc_mcr = 0;
291 tp->t_dev = reference_dev(dev);
294 * Initialize the termios status to the defaults. Add in the
295 * sticky bits from TIOCSFLAGS.
298 t.c_ospeed = TTYDEF_SPEED;
299 t.c_cflag = TTYDEF_CFLAG;
300 /* Make sure ucomparam() will do something. */
302 (void)ucomparam(tp, &t);
303 tp->t_iflag = TTYDEF_IFLAG;
304 tp->t_oflag = TTYDEF_OFLAG;
305 tp->t_lflag = TTYDEF_LFLAG;
310 * Turn on DTR. We must always do this, even if carrier is not
311 * present, because otherwise we'd have to use TIOCSDTR
312 * immediately after setting CLOCAL, which applications do not
313 * expect. We always assert DTR while the device is open
314 * unless explicitly requested to deassert it.
316 (void)ucomctl(sc, TIOCM_DTR | TIOCM_RTS, DMBIS);
318 /* Device specific open */
319 if (sc->sc_callback->ucom_open != NULL) {
320 error = sc->sc_callback->ucom_open(sc->sc_parent,
325 wakeup(&sc->sc_opening);
331 DPRINTF(("ucomopen: open pipes in = %d out = %d\n",
332 sc->sc_bulkin_no, sc->sc_bulkout_no));
334 /* Open the bulk pipes */
336 err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkin_no, 0,
337 &sc->sc_bulkin_pipe);
339 kprintf("%s: open bulk in error (addr %d): %s\n",
340 device_get_nameunit(sc->sc_dev), sc->sc_bulkin_no,
346 err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkout_no,
347 USBD_EXCLUSIVE_USE, &sc->sc_bulkout_pipe);
349 kprintf("%s: open bulk out error (addr %d): %s\n",
350 device_get_nameunit(sc->sc_dev), sc->sc_bulkout_no,
356 /* Allocate a request and an input buffer and start reading. */
357 sc->sc_ixfer = usbd_alloc_xfer(sc->sc_udev);
358 if (sc->sc_ixfer == NULL) {
363 sc->sc_ibuf = usbd_alloc_buffer(sc->sc_ixfer,
365 if (sc->sc_ibuf == NULL) {
370 sc->sc_oxfer = usbd_alloc_xfer(sc->sc_udev);
371 if (sc->sc_oxfer == NULL) {
376 sc->sc_obuf = usbd_alloc_buffer(sc->sc_oxfer,
379 if (sc->sc_obuf == NULL) {
385 * Handle initial DCD.
387 if (ISSET(sc->sc_msr, UMSR_DCD) ||
388 (minor(dev) & UCOM_CALLOUT_MASK))
389 (*linesw[tp->t_line].l_modem)(tp, 1);
395 wakeup(&sc->sc_opening);
398 error = ttyopen(dev, tp);
402 error = (*linesw[tp->t_line].l_open)(dev, tp);
406 disc_optim(tp, &tp->t_termios, sc);
408 DPRINTF(("%s: ucomopen: success\n", device_get_nameunit(sc->sc_dev)));
416 usbd_free_xfer(sc->sc_oxfer);
419 usbd_free_xfer(sc->sc_ixfer);
422 usbd_close_pipe(sc->sc_bulkout_pipe);
423 sc->sc_bulkout_pipe = NULL;
425 usbd_close_pipe(sc->sc_bulkin_pipe);
426 sc->sc_bulkin_pipe = NULL;
429 wakeup(&sc->sc_opening);
434 if (!ISSET(tp->t_state, TS_ISOPEN)) {
436 * We failed to open the device, and nobody else had it opened.
437 * Clean up the state as appropriate.
442 DPRINTF(("%s: ucomopen: failed\n", device_get_nameunit(sc->sc_dev)));
448 ucomclose(struct dev_close_args *ap)
450 cdev_t dev = ap->a_head.a_dev;
451 struct ucom_softc *sc;
454 sc = devclass_get_softc(ucom_devclass, UCOMUNIT(dev));
458 DPRINTF(("%s: ucomclose: unit = %d\n",
459 device_get_nameunit(sc->sc_dev), UCOMUNIT(dev)));
461 if (!ISSET(tp->t_state, TS_ISOPEN))
465 (*linesw[tp->t_line].l_close)(tp, ap->a_fflag);
466 disc_optim(tp, &tp->t_termios, sc);
473 if (!ISSET(tp->t_state, TS_ISOPEN)) {
475 * Although we got a last close, the device may still be in
476 * use; e.g. if this was the dialout node, and there are still
477 * processes waiting for carrier on the non-dialout node.
482 if (sc->sc_callback->ucom_close != NULL)
483 sc->sc_callback->ucom_close(sc->sc_parent, sc->sc_portno);
487 release_dev(tp->t_dev);
491 if (--sc->sc_refcnt < 0)
492 usb_detach_wakeup(sc->sc_dev);
498 ucomread(struct dev_read_args *ap)
500 cdev_t dev = ap->a_head.a_dev;
501 struct ucom_softc *sc;
505 sc = devclass_get_softc(ucom_devclass, UCOMUNIT(dev));
508 DPRINTF(("ucomread: tp = %p, flag = 0x%x\n", tp, ap->a_ioflag));
513 error = (*linesw[tp->t_line].l_read)(tp, ap->a_uio, ap->a_ioflag);
515 DPRINTF(("ucomread: error = %d\n", error));
521 ucomwrite(struct dev_write_args *ap)
523 cdev_t dev = ap->a_head.a_dev;
524 struct ucom_softc *sc;
528 sc = devclass_get_softc(ucom_devclass, UCOMUNIT(dev));
531 DPRINTF(("ucomwrite: tp = %p, flag = 0x%x\n", tp, ap->a_ioflag));
536 error = (*linesw[tp->t_line].l_write)(tp, ap->a_uio, ap->a_ioflag);
538 DPRINTF(("ucomwrite: error = %d\n", error));
544 ucomioctl(struct dev_ioctl_args *ap)
546 cdev_t dev = ap->a_head.a_dev;
547 struct ucom_softc *sc;
552 sc = devclass_get_softc(ucom_devclass, UCOMUNIT(dev));
558 DPRINTF(("ucomioctl: cmd = 0x%08lx\n", ap->a_cmd));
560 error = (*linesw[tp->t_line].l_ioctl)(tp, ap->a_cmd, ap->a_data,
561 ap->a_fflag, ap->a_cred);
562 if (error != ENOIOCTL) {
563 DPRINTF(("ucomioctl: l_ioctl: error = %d\n", error));
569 error = ttioctl(tp, ap->a_cmd, ap->a_data, ap->a_fflag);
570 disc_optim(tp, &tp->t_termios, sc);
571 if (error != ENOIOCTL) {
573 DPRINTF(("ucomioctl: ttioctl: error = %d\n", error));
577 if (sc->sc_callback->ucom_ioctl != NULL) {
578 error = sc->sc_callback->ucom_ioctl(sc->sc_parent,
580 ap->a_cmd, ap->a_data,
581 ap->a_fflag, curthread);
590 DPRINTF(("ucomioctl: our cmd = 0x%08lx\n", ap->a_cmd));
594 DPRINTF(("ucomioctl: TIOCSBRK\n"));
598 DPRINTF(("ucomioctl: TIOCCBRK\n"));
603 DPRINTF(("ucomioctl: TIOCSDTR\n"));
604 (void)ucomctl(sc, TIOCM_DTR, DMBIS);
607 DPRINTF(("ucomioctl: TIOCCDTR\n"));
608 (void)ucomctl(sc, TIOCM_DTR, DMBIC);
612 d = *(int *)ap->a_data;
613 DPRINTF(("ucomioctl: TIOCMSET, 0x%x\n", d));
614 (void)ucomctl(sc, d, DMSET);
617 d = *(int *)ap->a_data;
618 DPRINTF(("ucomioctl: TIOCMBIS, 0x%x\n", d));
619 (void)ucomctl(sc, d, DMBIS);
622 d = *(int *)ap->a_data;
623 DPRINTF(("ucomioctl: TIOCMBIC, 0x%x\n", d));
624 (void)ucomctl(sc, d, DMBIC);
627 d = ucomctl(sc, 0, DMGET);
628 DPRINTF(("ucomioctl: TIOCMGET, 0x%x\n", d));
629 *(int *)ap->a_data = d;
633 DPRINTF(("ucomioctl: error: our cmd = 0x%08lx\n", ap->a_cmd));
644 ucomctl(struct ucom_softc *sc, int bits, int how)
650 DPRINTF(("ucomctl: bits = 0x%x, how = %d\n", bits, how));
653 SET(bits, TIOCM_LE); /* always set TIOCM_LE bit */
654 DPRINTF(("ucomctl: DMGET: LE"));
657 if (ISSET(mcr, UMCR_DTR)) {
658 SET(bits, TIOCM_DTR);
661 if (ISSET(mcr, UMCR_RTS)) {
662 SET(bits, TIOCM_RTS);
667 if (ISSET(msr, UMSR_CTS)) {
668 SET(bits, TIOCM_CTS);
671 if (ISSET(msr, UMSR_DCD)) {
675 if (ISSET(msr, UMSR_DSR)) {
676 SET(bits, TIOCM_DSR);
679 if (ISSET(msr, UMSR_RI)) {
690 if (ISSET(bits, TIOCM_DTR))
692 if (ISSET(bits, TIOCM_RTS))
707 onoff = ISSET(sc->sc_mcr, UMCR_DTR) ? 1 : 0;
710 onoff = ISSET(sc->sc_mcr, UMCR_RTS) ? 1 : 0;
717 ucom_break(struct ucom_softc *sc, int onoff)
719 DPRINTF(("ucom_break: onoff = %d\n", onoff));
721 if (sc->sc_callback->ucom_set == NULL)
723 sc->sc_callback->ucom_set(sc->sc_parent, sc->sc_portno,
724 UCOM_SET_BREAK, onoff);
728 ucom_dtr(struct ucom_softc *sc, int onoff)
730 DPRINTF(("ucom_dtr: onoff = %d\n", onoff));
732 if (sc->sc_callback->ucom_set == NULL)
734 sc->sc_callback->ucom_set(sc->sc_parent, sc->sc_portno,
735 UCOM_SET_DTR, onoff);
739 ucom_rts(struct ucom_softc *sc, int onoff)
741 DPRINTF(("ucom_rts: onoff = %d\n", onoff));
743 if (sc->sc_callback->ucom_set == NULL)
745 sc->sc_callback->ucom_set(sc->sc_parent, sc->sc_portno,
746 UCOM_SET_RTS, onoff);
750 ucom_status_change(struct ucom_softc *sc)
752 struct tty *tp = sc->sc_tty;
756 if (sc->sc_callback->ucom_get_status == NULL) {
762 old_msr = sc->sc_msr;
763 sc->sc_callback->ucom_get_status(sc->sc_parent, sc->sc_portno,
764 &sc->sc_lsr, &sc->sc_msr);
765 if (ISSET((sc->sc_msr ^ old_msr), UMSR_DCD)) {
766 if (sc->sc_poll == 0)
768 onoff = ISSET(sc->sc_msr, UMSR_DCD) ? 1 : 0;
769 DPRINTF(("ucom_status_change: DCD changed to %d\n", onoff));
770 (*linesw[tp->t_line].l_modem)(tp, onoff);
775 ucomparam(struct tty *tp, struct termios *t)
777 struct ucom_softc *sc;
781 sc = devclass_get_softc(ucom_devclass, UCOMUNIT(tp->t_dev));
786 DPRINTF(("ucomparam: sc = %p\n", sc));
788 /* Check requested parameters. */
789 if (t->c_ospeed < 0) {
790 DPRINTF(("ucomparam: negative ospeed\n"));
793 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) {
794 DPRINTF(("ucomparam: mismatch ispeed and ospeed\n"));
799 * If there were no changes, don't do anything. This avoids dropping
800 * input and improves performance when all we did was frob things like
803 if (tp->t_ospeed == t->c_ospeed &&
804 tp->t_cflag == t->c_cflag)
807 /* And copy to tty. */
809 tp->t_ospeed = t->c_ospeed;
810 tp->t_cflag = t->c_cflag;
812 if (sc->sc_callback->ucom_param == NULL)
817 error = sc->sc_callback->ucom_param(sc->sc_parent, sc->sc_portno, t);
819 DPRINTF(("ucomparam: callback: error = %d\n", error));
825 if (t->c_cflag & CRTS_IFLOW) {
826 sc->sc_state |= UCS_RTS_IFLOW;
827 } else if (sc->sc_state & UCS_RTS_IFLOW) {
828 sc->sc_state &= ~UCS_RTS_IFLOW;
829 (void)ucomctl(sc, UMCR_RTS, DMBIS);
832 disc_optim(tp, t, sc);
834 uerr = ucomstartread(sc);
835 if (uerr != USBD_NORMAL_COMPLETION)
842 ucomstart(struct tty *tp)
844 struct ucom_softc *sc;
850 sc = devclass_get_softc(ucom_devclass, UCOMUNIT(tp->t_dev));
851 DPRINTF(("ucomstart: sc = %p\n", sc));
858 if (tp->t_state & TS_TBLOCK) {
859 if (ISSET(sc->sc_mcr, UMCR_RTS) &&
860 ISSET(sc->sc_state, UCS_RTS_IFLOW)) {
861 DPRINTF(("ucomstart: clear RTS\n"));
862 (void)ucomctl(sc, UMCR_RTS, DMBIC);
865 if (!ISSET(sc->sc_mcr, UMCR_RTS) &&
866 tp->t_rawq.c_cc <= tp->t_ilowat &&
867 ISSET(sc->sc_state, UCS_RTS_IFLOW)) {
868 DPRINTF(("ucomstart: set RTS\n"));
869 (void)ucomctl(sc, UMCR_RTS, DMBIS);
873 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) {
875 DPRINTF(("ucomstart: stopped\n"));
879 if (tp->t_outq.c_cc <= tp->t_olowat) {
880 if (ISSET(tp->t_state, TS_SO_OLOWAT)) {
881 CLR(tp->t_state, TS_SO_OLOWAT);
882 wakeup(TSA_OLOWAT(tp));
884 selwakeup(&tp->t_wsel);
885 if (tp->t_outq.c_cc == 0) {
886 if (ISSET(tp->t_state, TS_BUSY | TS_SO_OCOMPLETE) ==
887 TS_SO_OCOMPLETE && tp->t_outq.c_cc == 0) {
888 CLR(tp->t_state, TS_SO_OCOMPLETE);
889 wakeup(TSA_OCOMPLETE(tp));
895 /* Grab the first contiguous region of buffer space. */
896 data = tp->t_outq.c_cf;
897 cbp = (struct cblock *) ((intptr_t) tp->t_outq.c_cf & ~CROUND);
898 cnt = min((char *) (cbp+1) - tp->t_outq.c_cf, tp->t_outq.c_cc);
901 DPRINTF(("ucomstart: cnt == 0\n"));
905 SET(tp->t_state, TS_BUSY);
907 if (cnt > sc->sc_obufsize) {
908 DPRINTF(("ucomstart: big buffer %d chars\n", cnt));
909 cnt = sc->sc_obufsize;
911 if (sc->sc_callback->ucom_write != NULL)
912 sc->sc_callback->ucom_write(sc->sc_parent, sc->sc_portno,
913 sc->sc_obuf, data, &cnt);
915 memcpy(sc->sc_obuf, data, cnt);
917 DPRINTF(("ucomstart: %d chars\n", cnt));
918 usbd_setup_xfer(sc->sc_oxfer, sc->sc_bulkout_pipe,
919 (usbd_private_handle)sc, sc->sc_obuf, cnt,
920 USBD_NO_COPY, USBD_NO_TIMEOUT, ucomwritecb);
921 /* What can we do on error? */
922 err = usbd_transfer(sc->sc_oxfer);
923 if (err != USBD_IN_PROGRESS)
924 kprintf("ucomstart: err=%s\n", usbd_errstr(err));
933 ucomstop(struct tty *tp, int flag)
935 struct ucom_softc *sc;
937 sc = devclass_get_softc(ucom_devclass, UCOMUNIT(tp->t_dev));
939 DPRINTF(("ucomstop: %d\n", flag));
943 * This is just supposed to flush pending receive data,
944 * not stop the reception of data entirely!
946 DPRINTF(("ucomstop: read\n"));
952 DPRINTF(("ucomstop: write\n"));
954 if (ISSET(tp->t_state, TS_BUSY)) {
956 if (!ISSET(tp->t_state, TS_TTSTOP))
957 SET(tp->t_state, TS_FLUSH);
962 DPRINTF(("ucomstop: done\n"));
966 ucomwritecb(usbd_xfer_handle xfer, usbd_private_handle p, usbd_status status)
968 struct ucom_softc *sc = (struct ucom_softc *)p;
969 struct tty *tp = sc->sc_tty;
972 DPRINTF(("ucomwritecb: status = %d\n", status));
974 if (status == USBD_CANCELLED || sc->sc_dying)
977 if (status != USBD_NORMAL_COMPLETION) {
978 kprintf("%s: ucomwritecb: %s\n",
979 device_get_nameunit(sc->sc_dev), usbd_errstr(status));
980 if (status == USBD_STALLED)
981 usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe);
983 * XXX. We may need a flag to sequence ucomstopread() and
984 * ucomstartread() to handle the case where ucomstartread()
985 * is called after ucomstopread() but before the request has
986 * been properly canceled?
991 usbd_get_xfer_status(xfer, NULL, NULL, &cc, NULL);
992 DPRINTF(("ucomwritecb: cc = %d\n", cc));
993 if (cc <= sc->sc_opkthdrlen) {
994 kprintf("%s: sent size too small, cc = %d\n",
995 device_get_nameunit(sc->sc_dev), cc);
999 /* convert from USB bytes to tty bytes */
1000 cc -= sc->sc_opkthdrlen;
1003 CLR(tp->t_state, TS_BUSY);
1004 if (ISSET(tp->t_state, TS_FLUSH))
1005 CLR(tp->t_state, TS_FLUSH);
1007 ndflush(&tp->t_outq, cc);
1008 (*linesw[tp->t_line].l_start)(tp);
1015 CLR(tp->t_state, TS_BUSY);
1021 ucomstartread(struct ucom_softc *sc)
1025 DPRINTF(("ucomstartread: start\n"));
1027 sc->sc_state &= ~UCS_RXSTOP;
1029 if (sc->sc_bulkin_pipe == NULL)
1030 return (USBD_NORMAL_COMPLETION);
1032 usbd_setup_xfer(sc->sc_ixfer, sc->sc_bulkin_pipe,
1033 (usbd_private_handle)sc,
1034 sc->sc_ibuf, sc->sc_ibufsize,
1035 USBD_SHORT_XFER_OK | USBD_NO_COPY,
1036 USBD_NO_TIMEOUT, ucomreadcb);
1038 err = usbd_transfer(sc->sc_ixfer);
1039 if (err != USBD_IN_PROGRESS) {
1040 DPRINTF(("ucomstartread: err = %s\n", usbd_errstr(err)));
1044 return (USBD_NORMAL_COMPLETION);
1048 ucomreadcb(usbd_xfer_handle xfer, usbd_private_handle p, usbd_status status)
1050 struct ucom_softc *sc = (struct ucom_softc *)p;
1051 struct tty *tp = sc->sc_tty;
1052 int (*rint) (int c, struct tty *tp) = linesw[tp->t_line].l_rint;
1058 DPRINTF(("ucomreadcb: status = %d\n", status));
1060 if (status != USBD_NORMAL_COMPLETION) {
1061 if (!(sc->sc_state & UCS_RXSTOP))
1062 kprintf("%s: ucomreadcb: %s\n",
1063 device_get_nameunit(sc->sc_dev), usbd_errstr(status));
1064 if (status == USBD_STALLED)
1065 usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe);
1066 /* XXX we should restart after some delay. */
1070 usbd_get_xfer_status(xfer, NULL, (void **)&cp, &cc, NULL);
1071 DPRINTF(("ucomreadcb: got %d chars, tp = %p\n", cc, tp));
1075 if (sc->sc_callback->ucom_read != NULL) {
1076 sc->sc_callback->ucom_read(sc->sc_parent, sc->sc_portno,
1080 if (cc > sc->sc_ibufsize) {
1081 kprintf("%s: invalid receive data size, %d chars\n",
1082 device_get_nameunit(sc->sc_dev), cc);
1089 if (tp->t_state & TS_CAN_BYPASS_L_RINT) {
1090 if (tp->t_rawq.c_cc + cc > tp->t_ihiwat
1091 && (sc->sc_state & UCS_RTS_IFLOW
1092 || tp->t_iflag & IXOFF)
1093 && !(tp->t_state & TS_TBLOCK))
1095 lostcc = b_to_q((char *)cp, cc, &tp->t_rawq);
1099 if (*cp == sc->hotchar)
1108 if (tp->t_state & TS_TTSTOP
1109 && (tp->t_iflag & IXANY
1110 || tp->t_cc[VSTART] == tp->t_cc[VSTOP])) {
1111 tp->t_state &= ~TS_TTSTOP;
1112 tp->t_lflag &= ~FLUSHO;
1116 kprintf("%s: lost %d chars\n", device_get_nameunit(sc->sc_dev),
1119 /* Give characters to tty layer. */
1121 DPRINTFN(7, ("ucomreadcb: char = 0x%02x\n", *cp));
1122 if ((*rint)(*cp, tp) == -1) {
1123 /* XXX what should we do? */
1124 kprintf("%s: lost %d chars\n",
1125 device_get_nameunit(sc->sc_dev), cc);
1135 err = ucomstartread(sc);
1137 kprintf("%s: read start failed\n", device_get_nameunit(sc->sc_dev));
1138 /* XXX what should we dow now? */
1141 if ((sc->sc_state & UCS_RTS_IFLOW) && !ISSET(sc->sc_mcr, UMCR_RTS)
1142 && !(tp->t_state & TS_TBLOCK))
1143 ucomctl(sc, UMCR_RTS, DMBIS);
1147 ucom_cleanup(struct ucom_softc *sc)
1149 DPRINTF(("ucom_cleanup: closing pipes\n"));
1152 if (sc->sc_bulkin_pipe != NULL) {
1153 usbd_abort_pipe(sc->sc_bulkin_pipe);
1154 usbd_close_pipe(sc->sc_bulkin_pipe);
1155 sc->sc_bulkin_pipe = NULL;
1157 if (sc->sc_bulkout_pipe != NULL) {
1158 usbd_abort_pipe(sc->sc_bulkout_pipe);
1159 usbd_close_pipe(sc->sc_bulkout_pipe);
1160 sc->sc_bulkout_pipe = NULL;
1162 if (sc->sc_ixfer != NULL) {
1163 usbd_free_xfer(sc->sc_ixfer);
1164 sc->sc_ixfer = NULL;
1166 if (sc->sc_oxfer != NULL) {
1167 usbd_free_xfer(sc->sc_oxfer);
1168 sc->sc_oxfer = NULL;
1173 ucomstopread(struct ucom_softc *sc)
1177 DPRINTF(("ucomstopread: enter\n"));
1179 if (!(sc->sc_state & UCS_RXSTOP)) {
1180 sc->sc_state |= UCS_RXSTOP;
1181 if (sc->sc_bulkin_pipe == NULL) {
1182 DPRINTF(("ucomstopread: bulkin pipe NULL\n"));
1185 err = usbd_abort_pipe(sc->sc_bulkin_pipe);
1187 DPRINTF(("ucomstopread: err = %s\n",
1192 DPRINTF(("ucomstopread: leave\n"));
1196 disc_optim(struct tty *tp, struct termios *t, struct ucom_softc *sc)
1198 if (!(t->c_iflag & (ICRNL | IGNCR | IMAXBEL | INLCR | ISTRIP | IXON))
1199 && (!(t->c_iflag & BRKINT) || (t->c_iflag & IGNBRK))
1200 && (!(t->c_iflag & PARMRK)
1201 || (t->c_iflag & (IGNPAR | IGNBRK)) == (IGNPAR | IGNBRK))
1202 && !(t->c_lflag & (ECHO | ICANON | IEXTEN | ISIG | PENDIN))
1203 && linesw[tp->t_line].l_rint == ttyinput) {
1204 DPRINTF(("disc_optim: bypass l_rint\n"));
1205 tp->t_state |= TS_CAN_BYPASS_L_RINT;
1207 DPRINTF(("disc_optim: can't bypass l_rint\n"));
1208 tp->t_state &= ~TS_CAN_BYPASS_L_RINT;
1210 sc->hotchar = linesw[tp->t_line].l_hotchar;