1 /* $NetBSD: ucom.c,v 1.40 2001/11/13 06:24:54 lukem Exp $ */
4 * Copyright (c) 2001-2003, 2005, 2008
5 * Shunsuke Akiyama <akiyama@jp.FreeBSD.org>.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * Copyright (c) 1998, 2000 The NetBSD Foundation, Inc.
32 * All rights reserved.
34 * This code is derived from software contributed to The NetBSD Foundation
35 * by Lennart Augustsson (lennart@augustsson.net) at
36 * Carlstedt Research & Technology.
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions
41 * 1. Redistributions of source code must retain the above copyright
42 * notice, this list of conditions and the following disclaimer.
43 * 2. Redistributions in binary form must reproduce the above copyright
44 * notice, this list of conditions and the following disclaimer in the
45 * documentation and/or other materials provided with the distribution.
46 * 3. All advertising materials mentioning features or use of this software
47 * must display the following acknowledgement:
48 * This product includes software developed by the NetBSD
49 * Foundation, Inc. and its contributors.
50 * 4. Neither the name of The NetBSD Foundation nor the names of its
51 * contributors may be used to endorse or promote products derived
52 * from this software without specific prior written permission.
54 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
55 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
56 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
57 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
58 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
59 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
60 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
61 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
62 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
63 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
64 * POSSIBILITY OF SUCH DAMAGE.
67 #include <sys/stdint.h>
68 #include <sys/param.h>
69 #include <sys/queue.h>
70 #include <sys/types.h>
71 #include <sys/systm.h>
72 #include <sys/kernel.h>
74 #include <sys/module.h>
76 #include <sys/condvar.h>
77 #include <sys/sysctl.h>
78 #include <sys/unistd.h>
79 #include <sys/callout.h>
80 #include <sys/malloc.h>
83 #include <sys/serial.h>
84 #include <sys/thread2.h>
86 #include <sys/clist.h>
88 #include <bus/u4b/usb.h>
89 #include <bus/u4b/usbdi.h>
90 #include <bus/u4b/usbdi_util.h>
92 #define USB_DEBUG_VAR ucom_debug
93 #include <bus/u4b/usb_debug.h>
94 #include <bus/u4b/usb_busdma.h>
95 #include <bus/u4b/usb_process.h>
97 #include <bus/u4b/serial/usb_serial.h>
99 //#include "opt_gdb.h"
101 static SYSCTL_NODE(_hw_usb, OID_AUTO, ucom, CTLFLAG_RW, 0, "USB ucom");
104 static int ucom_debug = 0;
106 SYSCTL_INT(_hw_usb_ucom, OID_AUTO, debug, CTLFLAG_RW,
107 &ucom_debug, 0, "ucom debug level");
110 #define UCOM_CONS_BUFSIZE 1024
112 static uint8_t ucom_cons_rx_buf[UCOM_CONS_BUFSIZE];
113 static uint8_t ucom_cons_tx_buf[UCOM_CONS_BUFSIZE];
115 static unsigned int ucom_cons_rx_low = 0;
116 static unsigned int ucom_cons_rx_high = 0;
118 static unsigned int ucom_cons_tx_low = 0;
119 static unsigned int ucom_cons_tx_high = 0;
121 static int ucom_cons_unit = -1;
122 static int ucom_cons_subunit = 0;
123 static int ucom_cons_baud = 9600;
124 static struct ucom_softc *ucom_cons_softc = NULL;
126 TUNABLE_INT("hw.usb.ucom.cons_unit", &ucom_cons_unit);
127 SYSCTL_INT(_hw_usb_ucom, OID_AUTO, cons_unit, CTLFLAG_RW,
128 &ucom_cons_unit, 0, "console unit number");
129 TUNABLE_INT("hw.usb.ucom.cons_subunit", &ucom_cons_subunit);
130 SYSCTL_INT(_hw_usb_ucom, OID_AUTO, cons_subunit, CTLFLAG_RW,
131 &ucom_cons_subunit, 0, "console subunit number");
132 TUNABLE_INT("hw.usb.ucom.cons_baud", &ucom_cons_baud);
133 SYSCTL_INT(_hw_usb_ucom, OID_AUTO, cons_baud, CTLFLAG_RW,
134 &ucom_cons_baud, 0, "console baud rate");
136 static usb_proc_callback_t ucom_cfg_start_transfers;
137 static usb_proc_callback_t ucom_cfg_open;
138 static usb_proc_callback_t ucom_cfg_close;
139 static usb_proc_callback_t ucom_cfg_line_state;
140 static usb_proc_callback_t ucom_cfg_status_change;
141 static usb_proc_callback_t ucom_cfg_param;
143 static int ucom_unit_alloc(void);
144 static void ucom_unit_free(int);
145 static int ucom_attach_tty(struct ucom_super_softc *, struct ucom_softc *);
146 static void ucom_detach_tty(struct ucom_super_softc *, struct ucom_softc *);
147 static void ucom_queue_command(struct ucom_softc *,
148 usb_proc_callback_t *, struct termios *pt,
149 struct usb_proc_msg *t0, struct usb_proc_msg *t1);
150 static void ucom_shutdown(struct ucom_softc *);
151 static void ucom_ring(struct ucom_softc *, uint8_t);
152 static void ucom_break(struct ucom_softc *, uint8_t);
153 static void ucom_dtr(struct ucom_softc *, uint8_t);
154 static void ucom_rts(struct ucom_softc *, uint8_t);
156 static int ucom_open(struct ucom_softc *sc);
157 static int ucom_close(struct ucom_softc *sc);
158 static void ucom_start(struct tty *tp);
159 static void ucom_stop(struct tty *tp, int);
160 static int ucom_param(struct tty *tp, struct termios *t);
161 static int ucom_modem(struct tty *tp, int sigon, int sigoff);
163 static d_open_t ucom_dev_open;
164 static d_close_t ucom_dev_close;
165 static d_read_t ucom_dev_read;
166 static d_write_t ucom_dev_write;
167 static d_ioctl_t ucom_dev_ioctl;
169 static struct dev_ops ucom_ops = {
170 { "ucom", 0, D_MPSAFE | D_TTY },
171 .d_open = ucom_dev_open,
172 .d_close = ucom_dev_close,
173 .d_read = ucom_dev_read,
174 .d_write = ucom_dev_write,
175 .d_ioctl = ucom_dev_ioctl,
176 .d_kqfilter = ttykqfilter,
177 .d_revoke = ttyrevoke
180 static moduledata_t ucom_mod = {
186 DECLARE_MODULE(ucom, ucom_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE);
187 MODULE_DEPEND(ucom, usb, 1, 1, 1);
188 MODULE_VERSION(ucom, UCOM_MODVER);
191 #define tty_gone(tp) ((tp->t_state) & (TS_ZOMBIE))
194 static tsw_open_t ucom_open;
195 static tsw_close_t ucom_close;
196 static tsw_ioctl_t ucom_ioctl;
197 static tsw_modem_t ucom_modem;
198 static tsw_param_t ucom_param;
199 static tsw_outwakeup_t ucom_outwakeup;
200 static tsw_inwakeup_t ucom_inwakeup;
201 static tsw_free_t ucom_free;
203 static struct ttydevsw ucom_class = {
204 .tsw_flags = TF_INITLOCK | TF_CALLOUT,
205 .tsw_open = ucom_open,
206 .tsw_close = ucom_close,
207 .tsw_outwakeup = ucom_outwakeup,
208 .tsw_inwakeup = ucom_inwakeup,
209 .tsw_ioctl = ucom_ioctl,
210 .tsw_param = ucom_param,
211 .tsw_modem = ucom_modem,
212 .tsw_free = ucom_free,
216 #define UCOM_UNIT_MAX 128 /* maximum number of units */
217 #define UCOM_TTY_PREFIX "ucom"
219 static struct unrhdr *ucom_unrhdr;
220 static struct lock ucom_lock;
221 static int ucom_close_refs;
227 ucom_unrhdr = new_unrhdr(0, UCOM_UNIT_MAX - 1, NULL);
228 lockinit(&ucom_lock, "UCOM LOCK", 0, 0);
230 SYSINIT(ucom_init, SI_BOOT2_KLD - 1, SI_ORDER_ANY, ucom_init, NULL);
233 ucom_uninit(void *arg)
244 lockuninit(&ucom_lock);
246 SYSUNINIT(ucom_uninit, SI_BOOT2_KLD - 2, SI_ORDER_ANY, ucom_uninit, NULL);
249 * Mark a unit number (the X in cuaUX) as in use.
251 * Note that devices using a different naming scheme (see ucom_tty_name()
252 * callback) still use this unit allocation.
255 ucom_unit_alloc(void)
260 if (ucom_unrhdr == NULL) {
261 DPRINTF("ucom_unrhdr is NULL\n");
264 unit = alloc_unr(ucom_unrhdr);
265 DPRINTF("unit %d is allocated\n", unit);
270 * Mark the unit number as not in use.
273 ucom_unit_free(int unit)
276 if (unit < 0 || unit >= UCOM_UNIT_MAX || ucom_unrhdr == NULL) {
277 DPRINTF("cannot free unit number\n");
280 DPRINTF("unit %d is freed\n", unit);
281 free_unr(ucom_unrhdr, unit);
285 * Setup a group of one or more serial ports.
287 * The lock pointed to by "lock" is applied before all
288 * callbacks are called back. Also "lock" must be applied
289 * before calling into the ucom-layer!
292 ucom_attach(struct ucom_super_softc *ssc, struct ucom_softc *sc,
293 int subunits, void *parent,
294 const struct ucom_callback *callback, struct lock *lock)
301 (callback == NULL) ||
306 /* XXX Do we want our own lock here maybe */
309 /* allocate a uniq unit number */
310 ssc->sc_unit = ucom_unit_alloc();
311 if (ssc->sc_unit == -1)
314 /* generate TTY name string */
315 ksnprintf(ssc->sc_ttyname, sizeof(ssc->sc_ttyname),
316 UCOM_TTY_PREFIX "%d", ssc->sc_unit);
318 /* create USB request handling process */
319 error = usb_proc_create(&ssc->sc_tq, lock, "ucom", USB_PRI_MED);
321 ucom_unit_free(ssc->sc_unit);
324 ssc->sc_subunits = subunits;
325 ssc->sc_flag = UCOM_FLAG_ATTACHED |
328 if (callback->ucom_free == NULL)
329 ssc->sc_flag |= UCOM_FLAG_WAIT_REFS;
331 /* increment reference count */
334 for (subunit = 0; subunit < ssc->sc_subunits; subunit++) {
335 sc[subunit].sc_subunit = subunit;
336 sc[subunit].sc_super = ssc;
337 sc[subunit].sc_lock = lock;
338 sc[subunit].sc_parent = parent;
339 sc[subunit].sc_callback = callback;
341 error = ucom_attach_tty(ssc, &sc[subunit]);
343 ucom_detach(ssc, &sc[0]);
346 /* increment reference count */
349 /* set subunit attached */
350 sc[subunit].sc_flag |= UCOM_FLAG_ATTACHED;
353 DPRINTF("tp = %p, unit = %d, subunits = %d\n",
354 sc->sc_tty, ssc->sc_unit, ssc->sc_subunits);
360 * The following function will do nothing if the structure pointed to
361 * by "ssc" and "sc" is zero or has already been detached.
364 ucom_detach(struct ucom_super_softc *ssc, struct ucom_softc *sc)
368 if (!(ssc->sc_flag & UCOM_FLAG_ATTACHED))
369 return; /* not initialized */
371 if (ssc->sc_sysctl_ttyname != NULL) {
372 sysctl_remove_oid(ssc->sc_sysctl_ttyname, 1, 0);
373 ssc->sc_sysctl_ttyname = NULL;
376 if (ssc->sc_sysctl_ttyports != NULL) {
377 sysctl_remove_oid(ssc->sc_sysctl_ttyports, 1, 0);
378 ssc->sc_sysctl_ttyports = NULL;
381 usb_proc_drain(&ssc->sc_tq);
383 for (subunit = 0; subunit < ssc->sc_subunits; subunit++) {
384 if (sc[subunit].sc_flag & UCOM_FLAG_ATTACHED) {
386 ucom_detach_tty(ssc, &sc[subunit]);
388 /* avoid duplicate detach */
389 sc[subunit].sc_flag &= ~UCOM_FLAG_ATTACHED;
392 usb_proc_free(&ssc->sc_tq);
396 if (ssc->sc_flag & UCOM_FLAG_WAIT_REFS)
399 /* make sure we don't detach twice */
400 ssc->sc_flag &= ~UCOM_FLAG_ATTACHED;
404 ucom_drain(struct ucom_super_softc *ssc)
406 lockmgr(&ucom_lock, LK_EXCLUSIVE);
407 while (ssc->sc_refs > 0) {
408 kprintf("ucom: Waiting for a TTY device to close.\n");
409 usb_pause_mtx(&ucom_lock, hz);
411 lockmgr(&ucom_lock, LK_RELEASE);
415 ucom_drain_all(void *arg)
417 lockmgr(&ucom_lock, LK_EXCLUSIVE);
418 while (ucom_close_refs > 0) {
419 kprintf("ucom: Waiting for all detached TTY "
420 "devices to have open fds closed.\n");
421 usb_pause_mtx(&ucom_lock, hz);
423 lockmgr(&ucom_lock, LK_RELEASE);
427 ucom_attach_tty(struct ucom_super_softc *ssc, struct ucom_softc *sc)
430 char buf[32]; /* temporary TTY device name buffer */
433 lwkt_gettoken(&tty_token);
435 sc->sc_tty = tp = ttymalloc(sc->sc_tty);
438 lwkt_reltoken(&tty_token);
442 tp->t_sc = (void *)sc;
444 tp->t_oproc = ucom_start;
445 tp->t_param = ucom_param;
446 tp->t_stop = ucom_stop;
448 /* Check if the client has a custom TTY name */
450 if (sc->sc_callback->ucom_tty_name) {
451 sc->sc_callback->ucom_tty_name(sc, buf,
452 sizeof(buf), ssc->sc_unit, sc->sc_subunit);
455 /* Use default TTY name */
456 if (ssc->sc_subunits > 1) {
457 /* multiple modems in one */
458 ksnprintf(buf, sizeof(buf), UCOM_TTY_PREFIX "%u.%u",
459 ssc->sc_unit, sc->sc_subunit);
462 ksnprintf(buf, sizeof(buf), UCOM_TTY_PREFIX "%u",
467 dev = make_dev(&ucom_ops, ssc->sc_unit | 0x80, // XXX UCOM_CALLOUT_MASK,
468 UID_UUCP, GID_DIALER, 0660,
474 DPRINTF("ttycreate: %s\n", buf);
476 /* Check if this device should be a console */
477 if ((ucom_cons_softc == NULL) &&
478 (ssc->sc_unit == ucom_cons_unit) &&
479 (sc->sc_subunit == ucom_cons_subunit)) {
481 DPRINTF("unit %d subunit %d is console",
482 ssc->sc_unit, sc->sc_subunit);
484 ucom_cons_softc = sc;
487 tty_init_console(tp, ucom_cons_baud);
489 tp->t_termios.c_ispeed = ucom_cons_baud;
490 tp->t_termios.c_ospeed = ucom_cons_baud;
492 UCOM_MTX_LOCK(ucom_cons_softc);
493 ucom_cons_rx_low = 0;
494 ucom_cons_rx_high = 0;
495 ucom_cons_tx_low = 0;
496 ucom_cons_tx_high = 0;
497 sc->sc_flag |= UCOM_FLAG_CONSOLE;
499 ucom_open(ucom_cons_softc);
500 ucom_param(tp, &tp->t_termios);
501 UCOM_MTX_UNLOCK(ucom_cons_softc);
504 lwkt_reltoken(&tty_token);
509 ucom_detach_tty(struct ucom_super_softc *ssc, struct ucom_softc *sc)
511 struct tty *tp = sc->sc_tty;
513 DPRINTF("sc = %p, tp = %p\n", sc, sc->sc_tty);
515 if (sc->sc_flag & UCOM_FLAG_CONSOLE) {
516 UCOM_MTX_LOCK(ucom_cons_softc);
517 ucom_close(ucom_cons_softc);
518 sc->sc_flag &= ~UCOM_FLAG_CONSOLE;
519 UCOM_MTX_UNLOCK(ucom_cons_softc);
520 ucom_cons_softc = NULL;
523 /* the config thread has been stopped when we get here */
526 sc->sc_flag |= UCOM_FLAG_GONE;
527 sc->sc_flag &= ~(UCOM_FLAG_HL_READY | UCOM_FLAG_LL_READY);
531 lockmgr(&ucom_lock, LK_EXCLUSIVE);
533 lockmgr(&ucom_lock, LK_RELEASE);
539 ucom_close(sc); /* close, if any */
546 * make sure that read and write transfers are stopped
548 if (sc->sc_callback->ucom_stop_read) {
549 (sc->sc_callback->ucom_stop_read) (sc);
551 if (sc->sc_callback->ucom_stop_write) {
552 (sc->sc_callback->ucom_stop_write) (sc);
560 ucom_set_pnpinfo_usb(struct ucom_super_softc *ssc, device_t dev)
564 struct usb_attach_arg *uaa;
566 ksnprintf(buf, sizeof(buf), "ttyname=" UCOM_TTY_PREFIX
567 "%d ttyports=%d", ssc->sc_unit, ssc->sc_subunits);
569 /* Store the PNP info in the first interface for the device */
570 uaa = device_get_ivars(dev);
571 iface_index = uaa->info.bIfaceIndex;
573 if (usbd_set_pnpinfo(uaa->device, iface_index, buf) != 0)
574 device_printf(dev, "Could not set PNP info\n");
577 * The following information is also replicated in the PNP-info
578 * string which is registered above:
580 if (ssc->sc_sysctl_ttyname == NULL) {
582 ssc->sc_sysctl_ttyname = SYSCTL_ADD_STRING(NULL,
583 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
584 OID_AUTO, "ttyname", CTLFLAG_RD, ssc->sc_ttyname, 0,
585 "TTY device basename");
588 if (ssc->sc_sysctl_ttyports == NULL) {
590 ssc->sc_sysctl_ttyports = SYSCTL_ADD_INT(NULL,
591 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
592 OID_AUTO, "ttyports", CTLFLAG_RD,
593 NULL, ssc->sc_subunits, "Number of ports");
599 ucom_queue_command(struct ucom_softc *sc,
600 usb_proc_callback_t *fn, struct termios *pt,
601 struct usb_proc_msg *t0, struct usb_proc_msg *t1)
603 struct ucom_super_softc *ssc = sc->sc_super;
604 struct ucom_param_task *task;
606 UCOM_MTX_ASSERT(sc, MA_OWNED);
608 if (usb_proc_is_gone(&ssc->sc_tq)) {
609 DPRINTF("proc is gone\n");
610 return; /* nothing to do */
613 * NOTE: The task cannot get executed before we drop the
614 * "sc_lock" lock. It is safe to update fields in the message
615 * structure after that the message got queued.
617 task = (struct ucom_param_task *)
618 usb_proc_msignal(&ssc->sc_tq, t0, t1);
620 /* Setup callback and softc pointers */
621 task->hdr.pm_callback = fn;
625 * Make a copy of the termios. This field is only present if
626 * the "pt" field is not NULL.
629 task->termios_copy = *pt;
632 * Closing the device should be synchronous.
634 if (fn == ucom_cfg_close)
635 usb_proc_mwait(&ssc->sc_tq, t0, t1);
638 * In case of multiple configure requests,
639 * keep track of the last one!
641 if (fn == ucom_cfg_start_transfers)
642 sc->sc_last_start_xfer = &task->hdr;
646 ucom_shutdown(struct ucom_softc *sc)
648 struct tty *tp = sc->sc_tty;
650 UCOM_MTX_ASSERT(sc, MA_OWNED);
655 * Hang up if necessary:
657 if (tp->t_termios.c_cflag & HUPCL) {
658 ucom_modem(tp, 0, SER_DTR);
665 * else: taskqueue is draining or gone
668 ucom_cfg_is_gone(struct ucom_softc *sc)
670 struct ucom_super_softc *ssc = sc->sc_super;
672 return (usb_proc_is_gone(&ssc->sc_tq));
676 ucom_cfg_start_transfers(struct usb_proc_msg *_task)
678 struct ucom_cfg_task *task =
679 (struct ucom_cfg_task *)_task;
680 struct ucom_softc *sc = task->sc;
682 if (!(sc->sc_flag & UCOM_FLAG_LL_READY)) {
685 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) {
686 /* TTY device closed */
690 if (_task == sc->sc_last_start_xfer)
691 sc->sc_flag |= UCOM_FLAG_GP_DATA;
693 if (sc->sc_callback->ucom_start_read) {
694 (sc->sc_callback->ucom_start_read) (sc);
696 if (sc->sc_callback->ucom_start_write) {
697 (sc->sc_callback->ucom_start_write) (sc);
702 ucom_start_transfers(struct ucom_softc *sc)
704 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) {
708 * Make sure that data transfers are started in both
711 if (sc->sc_callback->ucom_start_read) {
712 (sc->sc_callback->ucom_start_read) (sc);
714 if (sc->sc_callback->ucom_start_write) {
715 (sc->sc_callback->ucom_start_write) (sc);
720 ucom_cfg_open(struct usb_proc_msg *_task)
722 struct ucom_cfg_task *task =
723 (struct ucom_cfg_task *)_task;
724 struct ucom_softc *sc = task->sc;
728 if (sc->sc_flag & UCOM_FLAG_LL_READY) {
734 sc->sc_flag |= UCOM_FLAG_LL_READY;
736 if (sc->sc_callback->ucom_cfg_open) {
737 (sc->sc_callback->ucom_cfg_open) (sc);
740 usb_pause_mtx(sc->sc_lock, hz / 10);
746 ucom_dev_open(struct dev_open_args *ap)
748 cdev_t dev = ap->a_head.a_dev;
749 struct ucom_softc *sc = (struct ucom_softc *)dev->si_drv1;
753 error = ucom_open(sc);
760 ucom_open(struct ucom_softc *sc)
764 if (sc->sc_flag & UCOM_FLAG_GONE) {
767 if (sc->sc_flag & UCOM_FLAG_HL_READY) {
771 DPRINTF("tp = %p\n", sc->sc_tty);
773 if (sc->sc_callback->ucom_pre_open) {
775 * give the lower layer a chance to disallow TTY open, for
776 * example if the device is not present:
778 error = (sc->sc_callback->ucom_pre_open) (sc);
783 sc->sc_flag |= UCOM_FLAG_HL_READY;
785 /* Disable transfers */
786 sc->sc_flag &= ~UCOM_FLAG_GP_DATA;
792 /* reset programmed line state */
797 /* reset jitter buffer */
798 sc->sc_jitterbuf_in = 0;
799 sc->sc_jitterbuf_out = 0;
801 ucom_queue_command(sc, ucom_cfg_open, NULL,
802 &sc->sc_open_task[0].hdr,
803 &sc->sc_open_task[1].hdr);
805 /* Queue transfer enable command last */
806 ucom_queue_command(sc, ucom_cfg_start_transfers, NULL,
807 &sc->sc_start_task[0].hdr,
808 &sc->sc_start_task[1].hdr);
810 ucom_modem(sc->sc_tty, SER_DTR | SER_RTS, 0);
816 ucom_status_change(sc);
822 ucom_cfg_close(struct usb_proc_msg *_task)
824 struct ucom_cfg_task *task =
825 (struct ucom_cfg_task *)_task;
826 struct ucom_softc *sc = task->sc;
830 if (sc->sc_flag & UCOM_FLAG_LL_READY) {
831 sc->sc_flag &= ~UCOM_FLAG_LL_READY;
832 if (sc->sc_callback->ucom_cfg_close)
833 (sc->sc_callback->ucom_cfg_close) (sc);
840 ucom_dev_close(struct dev_close_args *ap)
842 cdev_t dev = ap->a_head.a_dev;
843 struct ucom_softc *sc = (struct ucom_softc *)dev->si_drv1;
847 error = ucom_close(sc);
854 ucom_close(struct ucom_softc *sc)
857 struct tty *tp = sc->sc_tty;
861 DPRINTF("tp=%p\n", tp);
863 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) {
864 DPRINTF("tp=%p already closed\n", tp);
869 ucom_queue_command(sc, ucom_cfg_close, NULL,
870 &sc->sc_close_task[0].hdr,
871 &sc->sc_close_task[1].hdr);
873 sc->sc_flag &= ~(UCOM_FLAG_HL_READY | UCOM_FLAG_RTS_IFLOW);
875 if (sc->sc_callback->ucom_stop_read) {
876 (sc->sc_callback->ucom_stop_read) (sc);
884 ucom_inwakeup(struct tty *tp)
886 struct ucom_softc *sc = tty_softc(tp);
892 UCOM_MTX_ASSERT(sc, MA_OWNED);
894 DPRINTF("tp=%p\n", tp);
896 if (ttydisc_can_bypass(tp) != 0 ||
897 (sc->sc_flag & UCOM_FLAG_HL_READY) == 0 ||
898 (sc->sc_flag & UCOM_FLAG_INWAKEUP) != 0) {
902 /* prevent recursion */
903 sc->sc_flag |= UCOM_FLAG_INWAKEUP;
905 pos = sc->sc_jitterbuf_out;
907 while (sc->sc_jitterbuf_in != pos) {
910 c = (char)sc->sc_jitterbuf[pos];
912 if (ttydisc_rint(tp, c, 0) == -1)
915 if (pos >= UCOM_JITTERBUF_SIZE)
916 pos -= UCOM_JITTERBUF_SIZE;
919 sc->sc_jitterbuf_out = pos;
921 /* clear RTS in async fashion */
922 if ((sc->sc_jitterbuf_in == pos) &&
923 (sc->sc_flag & UCOM_FLAG_RTS_IFLOW))
926 sc->sc_flag &= ~UCOM_FLAG_INWAKEUP;
931 ucom_dev_read(struct dev_read_args *ap)
933 cdev_t dev = ap->a_head.a_dev;
934 struct ucom_softc *sc;
940 lwkt_gettoken(&tty_token);
947 DPRINTF("ucomread: tp = %p, flag = 0x%x\n", tp, ap->a_ioflag);
951 lwkt_reltoken(&tty_token);
957 error = (*linesw[tp->t_line].l_read)(tp, ap->a_uio, ap->a_ioflag);
960 DPRINTF("ucomread: error = %d\n", error);
962 lwkt_reltoken(&tty_token);
967 ucom_dev_write(struct dev_write_args *ap)
969 cdev_t dev = ap->a_head.a_dev;
970 struct ucom_softc *sc;
974 lwkt_gettoken(&tty_token);
980 DPRINTF("ucomwrite: tp = %p, flag = 0x%x\n", tp, ap->a_ioflag);
984 lwkt_reltoken(&tty_token);
990 error = (*linesw[tp->t_line].l_write)(tp, ap->a_uio, ap->a_ioflag);
993 DPRINTF("ucomwrite: error = %d\n", error);
995 lwkt_reltoken(&tty_token);
1000 ucom_dev_ioctl(struct dev_ioctl_args *ap)
1002 cdev_t dev = ap->a_head.a_dev;
1003 struct ucom_softc *sc = (struct ucom_softc *)dev->si_drv1;
1004 u_long cmd = ap->a_cmd;
1005 caddr_t data = ap->a_data;
1006 struct tty *tp = sc->sc_tty;
1010 lwkt_gettoken(&tty_token);
1012 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) {
1013 lwkt_reltoken(&tty_token);
1016 DPRINTF("cmd = 0x%08lx\n", cmd);
1018 error = (*linesw[tp->t_line].l_ioctl)(tp, ap->a_cmd, ap->a_data,
1019 ap->a_fflag, ap->a_cred);
1021 if (error != ENOIOCTL) {
1022 DPRINTF("ucomioctl: l_ioctl: error = %d\n", error);
1023 lwkt_reltoken(&tty_token);
1024 UCOM_MTX_UNLOCK(sc);
1030 error = ttioctl(tp, ap->a_cmd, ap->a_data, ap->a_fflag);
1031 /*disc_optim(tp, &tp->t_termios, sc); */
1032 if (error != ENOIOCTL) {
1034 DPRINTF("ucomioctl: ttioctl: error = %d\n", error);
1036 lwkt_reltoken(&tty_token);
1037 UCOM_MTX_UNLOCK(sc);
1063 if (sc->sc_callback->ucom_ioctl) {
1064 error = (sc->sc_callback->ucom_ioctl)
1065 (sc, cmd, data, 0, curthread);
1069 lwkt_reltoken(&tty_token);
1070 UCOM_MTX_UNLOCK(sc);
1081 lwkt_reltoken(&tty_token);
1082 UCOM_MTX_UNLOCK(sc);
1088 ucom_modem(struct tty *tp, int sigon, int sigoff)
1090 struct ucom_softc *sc = (struct ucom_softc *)tp->t_sc;
1093 UCOM_MTX_ASSERT(sc, MA_OWNED);
1095 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) {
1098 if ((sigon == 0) && (sigoff == 0)) {
1100 if (sc->sc_mcr & SER_DTR) {
1103 if (sc->sc_mcr & SER_RTS) {
1106 if (sc->sc_msr & SER_CTS) {
1109 if (sc->sc_msr & SER_DCD) {
1112 if (sc->sc_msr & SER_DSR) {
1115 if (sc->sc_msr & SER_RI) {
1120 if (sigon & SER_DTR) {
1121 sc->sc_mcr |= SER_DTR;
1123 if (sigoff & SER_DTR) {
1124 sc->sc_mcr &= ~SER_DTR;
1126 if (sigon & SER_RTS) {
1127 sc->sc_mcr |= SER_RTS;
1129 if (sigoff & SER_RTS) {
1130 sc->sc_mcr &= ~SER_RTS;
1132 onoff = (sc->sc_mcr & SER_DTR) ? 1 : 0;
1133 ucom_dtr(sc, onoff);
1135 onoff = (sc->sc_mcr & SER_RTS) ? 1 : 0;
1136 ucom_rts(sc, onoff);
1142 ucom_cfg_line_state(struct usb_proc_msg *_task)
1144 struct ucom_cfg_task *task =
1145 (struct ucom_cfg_task *)_task;
1146 struct ucom_softc *sc = task->sc;
1153 if (!(sc->sc_flag & UCOM_FLAG_LL_READY)) {
1158 /* compute callback mask */
1159 if (sc->sc_callback->ucom_cfg_set_dtr)
1160 mask |= UCOM_LS_DTR;
1161 if (sc->sc_callback->ucom_cfg_set_rts)
1162 mask |= UCOM_LS_RTS;
1163 if (sc->sc_callback->ucom_cfg_set_break)
1164 mask |= UCOM_LS_BREAK;
1165 if (sc->sc_callback->ucom_cfg_set_ring)
1166 mask |= UCOM_LS_RING;
1168 /* compute the bits we are to program */
1169 notch_bits = (sc->sc_pls_set & sc->sc_pls_clr) & mask;
1170 any_bits = (sc->sc_pls_set | sc->sc_pls_clr) & mask;
1171 prev_value = sc->sc_pls_curr ^ notch_bits;
1172 last_value = sc->sc_pls_curr;
1174 /* reset programmed line state */
1175 sc->sc_pls_curr = 0;
1179 /* ensure that we don't lose any levels */
1180 if (notch_bits & UCOM_LS_DTR)
1181 sc->sc_callback->ucom_cfg_set_dtr(sc,
1182 (prev_value & UCOM_LS_DTR) ? 1 : 0);
1183 if (notch_bits & UCOM_LS_RTS)
1184 sc->sc_callback->ucom_cfg_set_rts(sc,
1185 (prev_value & UCOM_LS_RTS) ? 1 : 0);
1186 if (notch_bits & UCOM_LS_BREAK)
1187 sc->sc_callback->ucom_cfg_set_break(sc,
1188 (prev_value & UCOM_LS_BREAK) ? 1 : 0);
1189 if (notch_bits & UCOM_LS_RING)
1190 sc->sc_callback->ucom_cfg_set_ring(sc,
1191 (prev_value & UCOM_LS_RING) ? 1 : 0);
1193 /* set last value */
1194 if (any_bits & UCOM_LS_DTR)
1195 sc->sc_callback->ucom_cfg_set_dtr(sc,
1196 (last_value & UCOM_LS_DTR) ? 1 : 0);
1197 if (any_bits & UCOM_LS_RTS)
1198 sc->sc_callback->ucom_cfg_set_rts(sc,
1199 (last_value & UCOM_LS_RTS) ? 1 : 0);
1200 if (any_bits & UCOM_LS_BREAK)
1201 sc->sc_callback->ucom_cfg_set_break(sc,
1202 (last_value & UCOM_LS_BREAK) ? 1 : 0);
1203 if (any_bits & UCOM_LS_RING)
1204 sc->sc_callback->ucom_cfg_set_ring(sc,
1205 (last_value & UCOM_LS_RING) ? 1 : 0);
1209 ucom_line_state(struct ucom_softc *sc,
1210 uint8_t set_bits, uint8_t clear_bits)
1212 UCOM_MTX_ASSERT(sc, MA_OWNED);
1214 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) {
1218 DPRINTF("on=0x%02x, off=0x%02x\n", set_bits, clear_bits);
1220 /* update current programmed line state */
1221 sc->sc_pls_curr |= set_bits;
1222 sc->sc_pls_curr &= ~clear_bits;
1223 sc->sc_pls_set |= set_bits;
1224 sc->sc_pls_clr |= clear_bits;
1226 /* defer driver programming */
1227 ucom_queue_command(sc, ucom_cfg_line_state, NULL,
1228 &sc->sc_line_state_task[0].hdr,
1229 &sc->sc_line_state_task[1].hdr);
1233 ucom_ring(struct ucom_softc *sc, uint8_t onoff)
1235 DPRINTF("onoff = %d\n", onoff);
1238 ucom_line_state(sc, UCOM_LS_RING, 0);
1240 ucom_line_state(sc, 0, UCOM_LS_RING);
1244 ucom_break(struct ucom_softc *sc, uint8_t onoff)
1246 DPRINTF("onoff = %d\n", onoff);
1249 ucom_line_state(sc, UCOM_LS_BREAK, 0);
1251 ucom_line_state(sc, 0, UCOM_LS_BREAK);
1255 ucom_dtr(struct ucom_softc *sc, uint8_t onoff)
1257 DPRINTF("onoff = %d\n", onoff);
1260 ucom_line_state(sc, UCOM_LS_DTR, 0);
1262 ucom_line_state(sc, 0, UCOM_LS_DTR);
1266 ucom_rts(struct ucom_softc *sc, uint8_t onoff)
1268 DPRINTF("onoff = %d\n", onoff);
1271 ucom_line_state(sc, UCOM_LS_RTS, 0);
1273 ucom_line_state(sc, 0, UCOM_LS_RTS);
1277 ucom_cfg_status_change(struct usb_proc_msg *_task)
1279 struct ucom_cfg_task *task =
1280 (struct ucom_cfg_task *)_task;
1281 struct ucom_softc *sc = task->sc;
1290 UCOM_MTX_ASSERT(sc, MA_OWNED);
1292 if (!(sc->sc_flag & UCOM_FLAG_LL_READY)) {
1295 if (sc->sc_callback->ucom_cfg_get_status == NULL) {
1303 (sc->sc_callback->ucom_cfg_get_status) (sc, &new_lsr, &new_msr);
1305 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) {
1306 /* TTY device closed */
1309 onoff = ((sc->sc_msr ^ new_msr) & SER_DCD);
1310 lsr_delta = (sc->sc_lsr ^ new_lsr);
1312 sc->sc_msr = new_msr;
1313 sc->sc_lsr = new_lsr;
1317 onoff = (sc->sc_msr & SER_DCD) ? 1 : 0;
1319 DPRINTF("DCD changed to %d\n", onoff);
1321 (*linesw[tp->t_line].l_modem)(tp, onoff);
1324 if ((lsr_delta & ULSR_BI) && (sc->sc_lsr & ULSR_BI)) {
1326 DPRINTF("BREAK detected\n");
1328 (*linesw[tp->t_line].l_rint)(0, tp);
1331 ttydisc_rint(tp, 0, TRE_BREAK);
1332 ttydisc_rint_done(tp);
1336 if ((lsr_delta & ULSR_FE) && (sc->sc_lsr & ULSR_FE)) {
1338 DPRINTF("Frame error detected\n");
1340 (*linesw[tp->t_line].l_rint)(0, tp);
1342 ttydisc_rint(tp, 0, TRE_FRAMING);
1343 ttydisc_rint_done(tp);
1347 if ((lsr_delta & ULSR_PE) && (sc->sc_lsr & ULSR_PE)) {
1349 DPRINTF("Parity error detected\n");
1351 (*linesw[tp->t_line].l_rint)(0, tp);
1353 ttydisc_rint(tp, 0, TRE_PARITY);
1354 ttydisc_rint_done(tp);
1360 ucom_status_change(struct ucom_softc *sc)
1362 UCOM_MTX_ASSERT(sc, MA_OWNED);
1364 if (sc->sc_flag & UCOM_FLAG_CONSOLE)
1365 return; /* not supported */
1367 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) {
1372 ucom_queue_command(sc, ucom_cfg_status_change, NULL,
1373 &sc->sc_status_task[0].hdr,
1374 &sc->sc_status_task[1].hdr);
1378 ucom_cfg_param(struct usb_proc_msg *_task)
1380 struct ucom_param_task *task =
1381 (struct ucom_param_task *)_task;
1382 struct ucom_softc *sc = task->sc;
1384 if (!(sc->sc_flag & UCOM_FLAG_LL_READY)) {
1387 if (sc->sc_callback->ucom_cfg_param == NULL) {
1391 (sc->sc_callback->ucom_cfg_param) (sc, &task->termios_copy);
1394 usb_pause_mtx(sc->sc_lock, hz / 10);
1398 ucom_param(struct tty *tp, struct termios *t)
1400 struct ucom_softc *sc = (struct ucom_softc *)tp->t_sc;
1404 lwkt_gettoken(&tty_token);
1405 UCOM_MTX_ASSERT(sc, MA_OWNED);
1410 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) {
1412 /* XXX the TTY layer should call "open()" first! */
1414 * Not quite: Its ordering is partly backwards, but
1415 * some parameters must be set early in ttydev_open(),
1416 * possibly before calling ttydevsw_open().
1418 error = ucom_open(sc);
1425 DPRINTF("sc = %p\n", sc);
1427 /* Check requested parameters. */
1428 if (t->c_ispeed && (t->c_ispeed != t->c_ospeed)) {
1429 /* XXX c_ospeed == 0 is perfectly valid. */
1430 DPRINTF("mismatch ispeed and ospeed\n");
1434 t->c_ispeed = t->c_ospeed;
1436 if (sc->sc_callback->ucom_pre_param) {
1437 /* Let the lower layer verify the parameters */
1438 error = (sc->sc_callback->ucom_pre_param) (sc, t);
1440 DPRINTF("callback error = %d\n", error);
1445 /* Disable transfers */
1446 sc->sc_flag &= ~UCOM_FLAG_GP_DATA;
1448 /* Queue baud rate programming command first */
1449 ucom_queue_command(sc, ucom_cfg_param, t,
1450 &sc->sc_param_task[0].hdr,
1451 &sc->sc_param_task[1].hdr);
1453 /* Queue transfer enable command last */
1454 ucom_queue_command(sc, ucom_cfg_start_transfers, NULL,
1455 &sc->sc_start_task[0].hdr,
1456 &sc->sc_start_task[1].hdr);
1458 if (t->c_cflag & CRTS_IFLOW) {
1459 sc->sc_flag |= UCOM_FLAG_RTS_IFLOW;
1460 } else if (sc->sc_flag & UCOM_FLAG_RTS_IFLOW) {
1461 sc->sc_flag &= ~UCOM_FLAG_RTS_IFLOW;
1462 ucom_modem(tp, SER_RTS, 0);
1471 lwkt_reltoken(&tty_token);
1476 ucom_start(struct tty *tp)
1478 struct ucom_softc *sc = (struct ucom_softc *)tp->t_sc;
1480 UCOM_MTX_ASSERT(sc, MA_OWNED);
1482 DPRINTF("sc = %p\n", sc);
1484 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) {
1485 /* The higher layer is not ready */
1488 ucom_start_transfers(sc);
1492 ucom_stop(struct tty *tp, int x)
1497 /*------------------------------------------------------------------------*
1500 * len: maximum length of data to get
1503 * 0: No data is available.
1504 * Else: Data is available.
1505 *------------------------------------------------------------------------*/
1507 ucom_get_data(struct ucom_softc *sc, struct usb_page_cache *pc,
1508 uint32_t offset, uint32_t len, uint32_t *actlen)
1510 struct usb_page_search res;
1511 struct tty *tp = sc->sc_tty;
1513 uint32_t offset_orig;
1517 UCOM_MTX_ASSERT(sc, MA_OWNED);
1519 if (sc->sc_flag & UCOM_FLAG_CONSOLE) {
1522 /* get total TX length */
1524 temp = ucom_cons_tx_high - ucom_cons_tx_low;
1525 temp %= UCOM_CONS_BUFSIZE;
1527 /* limit TX length */
1529 if (temp > (UCOM_CONS_BUFSIZE - ucom_cons_tx_low))
1530 temp = (UCOM_CONS_BUFSIZE - ucom_cons_tx_low);
1537 usbd_copy_in(pc, offset, ucom_cons_tx_buf + ucom_cons_tx_low, temp);
1539 /* update counters */
1541 ucom_cons_tx_low += temp;
1542 ucom_cons_tx_low %= UCOM_CONS_BUFSIZE;
1544 /* store actual length */
1548 return (temp ? 1 : 0);
1552 !(sc->sc_flag & UCOM_FLAG_GP_DATA)) {
1554 return (0); /* multiport device polling */
1556 offset_orig = offset;
1558 lwkt_gettoken(&tty_token);
1561 usbd_get_page(pc, offset, &res);
1563 if (res.length > len) {
1566 /* copy data directly into USB buffer */
1567 data = tp->t_outq.c_cf;
1568 cbp = (struct cblock *) ((intptr_t) tp->t_outq.c_cf & ~CROUND);
1569 cnt = min((char *)(cbp+1) - tp->t_outq.c_cf, tp->t_outq.c_cc);
1571 SET(tp->t_state, TS_BUSY);
1572 memcpy(res.buffer, data, cnt);
1573 CLR(tp->t_state, TS_BUSY);
1575 if (ISSET(tp->t_state, TS_FLUSH))
1576 CLR(tp->t_state, TS_FLUSH);
1578 ndflush(&tp->t_outq,cnt);
1583 if (cnt < res.length) {
1589 lwkt_reltoken(&tty_token);
1591 actlen[0] = offset - offset_orig;
1593 DPRINTF("cnt=%d\n", actlen[0]);
1595 if (actlen[0] == 0) {
1602 ucom_put_data(struct ucom_softc *sc, struct usb_page_cache *pc,
1603 uint32_t offset, uint32_t len)
1605 struct usb_page_search res;
1606 struct tty *tp = sc->sc_tty;
1611 UCOM_MTX_ASSERT(sc, MA_OWNED);
1612 lwkt_gettoken(&tty_token);
1614 if (sc->sc_flag & UCOM_FLAG_CONSOLE) {
1617 /* get maximum RX length */
1619 temp = (UCOM_CONS_BUFSIZE - 1) - ucom_cons_rx_high + ucom_cons_rx_low;
1620 temp %= UCOM_CONS_BUFSIZE;
1622 /* limit RX length */
1624 if (temp > (UCOM_CONS_BUFSIZE - ucom_cons_rx_high))
1625 temp = (UCOM_CONS_BUFSIZE - ucom_cons_rx_high);
1632 usbd_copy_out(pc, offset, ucom_cons_rx_buf + ucom_cons_rx_high, temp);
1634 /* update counters */
1636 ucom_cons_rx_high += temp;
1637 ucom_cons_rx_high %= UCOM_CONS_BUFSIZE;
1639 lwkt_reltoken(&tty_token);
1644 lwkt_reltoken(&tty_token);
1645 return; /* multiport device polling */
1648 lwkt_reltoken(&tty_token);
1649 return; /* no data */
1652 /* set a flag to prevent recursation ? */
1655 usbd_get_page(pc, offset, &res);
1657 if (res.length > len) {
1661 offset += res.length;
1663 /* pass characters to tty layer */
1668 /* first check if we can pass the buffer directly */
1671 if (tp->t_state & TS_CAN_BYPASS_L_RINT) {
1672 /* clear any jitter buffer */
1673 sc->sc_jitterbuf_in = 0;
1674 sc->sc_jitterbuf_out = 0;
1676 if (tp->t_rawq.c_cc + cnt > tp->t_ihiwat
1677 && (sc->sc_flag & UCOM_FLAG_RTS_IFLOW
1678 || tp->t_iflag & IXOFF)
1679 && !(tp->t_state & TS_TBLOCK))
1681 lostcc = b_to_q((char *)buf, cnt, &tp->t_rawq);
1685 if (*buf == sc->hotchar)
1694 if (tp->t_state & TS_TTSTOP
1695 && (tp->t_iflag & IXANY
1696 || tp->t_cc[VSTART] == tp->t_cc[VSTOP])) {
1697 tp->t_state &= ~TS_TTSTOP;
1698 tp->t_lflag &= ~FLUSHO;
1702 kprintf("lost %d chars\n", lostcc);
1705 if (ttydisc_rint_bypass(tp, buf, cnt) != cnt) {
1706 DPRINTF("tp=%p, data lost\n", tp);
1711 for (cnt = 0; cnt != res.length; cnt++) {
1712 if (sc->sc_jitterbuf_in != sc->sc_jitterbuf_out ||
1713 (*linesw[tp->t_line].l_rint)(buf[cnt], tp) == -1) {
1717 pos = sc->sc_jitterbuf_in;
1718 end = sc->sc_jitterbuf_out +
1719 UCOM_JITTERBUF_SIZE - 1;
1721 if (end >= UCOM_JITTERBUF_SIZE)
1722 end -= UCOM_JITTERBUF_SIZE;
1724 for (; cnt != res.length; cnt++) {
1727 sc->sc_jitterbuf[pos] = buf[cnt];
1729 if (pos >= UCOM_JITTERBUF_SIZE)
1730 pos -= UCOM_JITTERBUF_SIZE;
1733 sc->sc_jitterbuf_in = pos;
1735 /* set RTS in async fashion */
1736 if (sc->sc_flag & UCOM_FLAG_RTS_IFLOW)
1739 DPRINTF("tp=%p, lost %d "
1740 "chars\n", tp, res.length - cnt);
1747 lwkt_reltoken(&tty_token);
1749 ttydisc_rint_done(tp);
1755 ucom_free(void *xsc)
1757 struct ucom_softc *sc = xsc;
1759 if (sc->sc_callback->ucom_free != NULL)
1760 sc->sc_callback->ucom_free(sc);
1762 /*ucom_unref(sc->sc_super) XXX hack, see end of ucom_detach_tty() */;
1764 lockmgr(&ucom_lock, LK_EXCLUSIVE);
1766 lockmgr(&ucom_lock, LK_RELEASE);
1769 static cn_probe_t ucom_cnprobe;
1770 static cn_init_t ucom_cninit;
1771 static cn_term_t ucom_cnterm;
1772 static cn_getc_t ucom_cngetc;
1773 static cn_putc_t ucom_cnputc;
1776 static cn_grab_t ucom_cngrab;
1777 static cn_ungrab_t ucom_cnungrab;
1778 CONSOLE_DRIVER(ucom);
1782 ucom_cnprobe(struct consdev *cp)
1784 if (ucom_cons_unit != -1)
1785 cp->cn_pri = CN_NORMAL;
1787 cp->cn_pri = CN_DEAD;
1790 strlcpy(cp->cn_name, "ucom", sizeof(cp->cn_name));
1795 ucom_cninit(struct consdev *cp)
1800 ucom_cnterm(struct consdev *cp)
1805 ucom_cngrab(struct consdev *cp)
1810 ucom_cnungrab(struct consdev *cp)
1815 ucom_cngetc(struct consdev *cd)
1817 struct ucom_softc *sc = ucom_cons_softc;
1825 if (ucom_cons_rx_low != ucom_cons_rx_high) {
1826 c = ucom_cons_rx_buf[ucom_cons_rx_low];
1827 ucom_cons_rx_low ++;
1828 ucom_cons_rx_low %= UCOM_CONS_BUFSIZE;
1833 /* start USB transfers */
1834 ucom_outwakeup(sc->sc_tty);
1836 UCOM_MTX_UNLOCK(sc);
1838 /* poll if necessary */
1840 if (kdb_active && sc->sc_callback->ucom_poll)
1841 (sc->sc_callback->ucom_poll) (sc);
1847 ucom_cnputc(void *cd, int c)
1849 ucom_cnputc(struct consdev *cd, int c)
1853 struct ucom_softc *sc = ucom_cons_softc;
1863 /* compute maximum TX length */
1865 temp = (UCOM_CONS_BUFSIZE - 1) - ucom_cons_tx_high + ucom_cons_tx_low;
1866 temp %= UCOM_CONS_BUFSIZE;
1869 ucom_cons_tx_buf[ucom_cons_tx_high] = c;
1870 ucom_cons_tx_high ++;
1871 ucom_cons_tx_high %= UCOM_CONS_BUFSIZE;
1874 /* start USB transfers */
1875 ucom_outwakeup(sc->sc_tty);
1877 UCOM_MTX_UNLOCK(sc);
1879 /* poll if necessary */
1881 if (kdb_active && sc->sc_callback->ucom_poll) {
1882 (sc->sc_callback->ucom_poll) (sc);
1883 /* simple flow control */
1890 /*------------------------------------------------------------------------*
1893 * This function will increment the super UCOM reference count.
1894 *------------------------------------------------------------------------*/
1896 ucom_ref(struct ucom_super_softc *ssc)
1898 lockmgr(&ucom_lock, LK_EXCLUSIVE);
1900 lockmgr(&ucom_lock, LK_RELEASE);
1903 /*------------------------------------------------------------------------*
1906 * This function will free the super UCOM's allocated unit
1907 * number. This function can be called on a zero-initialized
1908 * structure. This function can be called multiple times.
1909 *------------------------------------------------------------------------*/
1911 ucom_free_unit(struct ucom_super_softc *ssc)
1913 if (!(ssc->sc_flag & UCOM_FLAG_FREE_UNIT))
1916 ucom_unit_free(ssc->sc_unit);
1918 ssc->sc_flag &= ~UCOM_FLAG_FREE_UNIT;
1921 /*------------------------------------------------------------------------*
1924 * This function will decrement the super UCOM reference count.
1927 * 0: UCOM structures are still referenced.
1928 * Else: UCOM structures are no longer referenced.
1929 *------------------------------------------------------------------------*/
1931 ucom_unref(struct ucom_super_softc *ssc)
1935 lockmgr(&ucom_lock, LK_EXCLUSIVE);
1936 retval = (ssc->sc_refs < 2);
1938 lockmgr(&ucom_lock, LK_RELEASE);
1941 ucom_free_unit(ssc);
1948 #include <gdb/gdb.h>
1950 static gdb_probe_f ucom_gdbprobe;
1951 static gdb_init_f ucom_gdbinit;
1952 static gdb_term_f ucom_gdbterm;
1953 static gdb_getc_f ucom_gdbgetc;
1954 static gdb_putc_f ucom_gdbputc;
1956 GDB_DBGPORT(sio, ucom_gdbprobe, ucom_gdbinit, ucom_gdbterm, ucom_gdbgetc, ucom_gdbputc);
1961 return ((ucom_cons_softc != NULL) ? 0 : -1);
1977 ucom_cnputc(NULL, c);
1983 return (ucom_cngetc(NULL));