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>
87 #include <bus/u4b/usb.h>
88 #include <bus/u4b/usbdi.h>
89 #include <bus/u4b/usbdi_util.h>
91 #define USB_DEBUG_VAR ucom_debug
92 #include <bus/u4b/usb_debug.h>
93 #include <bus/u4b/usb_busdma.h>
94 #include <bus/u4b/usb_process.h>
96 #include <bus/u4b/serial/usb_serial.h>
98 //#include "opt_gdb.h"
100 static SYSCTL_NODE(_hw_usb, OID_AUTO, ucom, CTLFLAG_RW, 0, "USB ucom");
103 static int ucom_debug = 0;
105 SYSCTL_INT(_hw_usb_ucom, OID_AUTO, debug, CTLFLAG_RW,
106 &ucom_debug, 0, "ucom debug level");
109 #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];
116 static unsigned int ucom_cons_rx_low = 0;
117 static unsigned int ucom_cons_rx_high = 0;
119 static unsigned int ucom_cons_tx_low = 0;
120 static unsigned int ucom_cons_tx_high = 0;
122 static int ucom_cons_unit = -1;
123 static int ucom_cons_subunit = 0;
124 static int ucom_cons_baud = 9600;
125 static struct ucom_softc *ucom_cons_softc = NULL;
127 TUNABLE_INT("hw.usb.ucom.cons_unit", &ucom_cons_unit);
128 SYSCTL_INT(_hw_usb_ucom, OID_AUTO, cons_unit, CTLFLAG_RW,
129 &ucom_cons_unit, 0, "console unit number");
130 TUNABLE_INT("hw.usb.ucom.cons_subunit", &ucom_cons_subunit);
131 SYSCTL_INT(_hw_usb_ucom, OID_AUTO, cons_subunit, CTLFLAG_RW,
132 &ucom_cons_subunit, 0, "console subunit number");
133 TUNABLE_INT("hw.usb.ucom.cons_baud", &ucom_cons_baud);
134 SYSCTL_INT(_hw_usb_ucom, OID_AUTO, cons_baud, CTLFLAG_RW,
135 &ucom_cons_baud, 0, "console baud rate");
137 static usb_proc_callback_t ucom_cfg_start_transfers;
138 static usb_proc_callback_t ucom_cfg_open;
139 static usb_proc_callback_t ucom_cfg_close;
140 static usb_proc_callback_t ucom_cfg_line_state;
141 static usb_proc_callback_t ucom_cfg_status_change;
142 static usb_proc_callback_t ucom_cfg_param;
144 static int ucom_unit_alloc(void);
145 static void ucom_unit_free(int);
146 static int ucom_attach_tty(struct ucom_super_softc *, struct ucom_softc *);
147 static void ucom_detach_tty(struct ucom_super_softc *, struct ucom_softc *);
148 static void ucom_queue_command(struct ucom_softc *,
149 usb_proc_callback_t *, struct termios *pt,
150 struct usb_proc_msg *t0, struct usb_proc_msg *t1);
151 static void ucom_shutdown(struct ucom_softc *);
152 static void ucom_ring(struct ucom_softc *, uint8_t);
153 static void ucom_break(struct ucom_softc *, uint8_t);
154 static void ucom_dtr(struct ucom_softc *, uint8_t);
155 static void ucom_rts(struct ucom_softc *, uint8_t);
157 static int ucom_open(struct ucom_softc *sc);
158 static int ucom_close(struct ucom_softc *sc);
159 static void ucom_start(struct tty *tp);
160 static void ucom_stop(struct tty *tp, int);
161 static int ucom_param(struct tty *tp, struct termios *t);
162 static int ucom_modem(struct tty *tp, int sigon, int sigoff);
164 static d_open_t ucom_dev_open;
165 static d_close_t ucom_dev_close;
166 static d_read_t ucom_dev_read;
167 static d_write_t ucom_dev_write;
168 static d_ioctl_t ucom_dev_ioctl;
170 static struct dev_ops ucom_ops = {
171 { "ucom", 0, D_MPSAFE | D_TTY },
172 .d_open = ucom_dev_open,
173 .d_close = ucom_dev_close,
174 .d_read = ucom_dev_read,
175 .d_write = ucom_dev_write,
176 .d_ioctl = ucom_dev_ioctl,
177 .d_kqfilter = ttykqfilter,
178 .d_revoke = ttyrevoke
181 devclass_t ucom_devclass;
183 static moduledata_t ucom_mod = {
189 DECLARE_MODULE(ucom, ucom_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE);
190 MODULE_DEPEND(ucom, usb, 1, 1, 1);
191 MODULE_VERSION(ucom, UCOM_MODVER);
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 kprintf("ucom init\n");
228 ucom_unrhdr = new_unrhdr(0, UCOM_UNIT_MAX - 1, NULL);
229 lockinit(&ucom_lock, "UCOM LOCK", 0, 0);
231 SYSINIT(ucom_init, SI_BOOT2_KLD - 1, SI_ORDER_ANY, ucom_init, NULL);
234 ucom_uninit(void *arg)
245 lockuninit(&ucom_lock);
247 SYSUNINIT(ucom_uninit, SI_BOOT2_KLD - 2, SI_ORDER_ANY, ucom_uninit, NULL);
250 * Mark a unit number (the X in cuaUX) as in use.
252 * Note that devices using a different naming scheme (see ucom_tty_name()
253 * callback) still use this unit allocation.
256 ucom_unit_alloc(void)
261 if (ucom_unrhdr == NULL) {
262 DPRINTF("ucom_unrhdr is NULL\n");
265 unit = alloc_unr(ucom_unrhdr);
266 DPRINTF("unit %d is allocated\n", unit);
271 * Mark the unit number as not in use.
274 ucom_unit_free(int unit)
277 if (unit < 0 || unit >= UCOM_UNIT_MAX || ucom_unrhdr == NULL) {
278 DPRINTF("cannot free unit number\n");
281 DPRINTF("unit %d is freed\n", unit);
282 free_unr(ucom_unrhdr, unit);
286 * Setup a group of one or more serial ports.
288 * The lock pointed to by "lock" is applied before all
289 * callbacks are called back. Also "lock" must be applied
290 * before calling into the ucom-layer!
293 ucom_attach(struct ucom_super_softc *ssc, struct ucom_softc *sc,
294 int subunits, void *parent,
295 const struct ucom_callback *callback, struct lock *lock)
302 (callback == NULL) ||
307 /* XXX Do we want our own lock here maybe */
310 /* allocate a uniq unit number */
311 ssc->sc_unit = ucom_unit_alloc();
312 if (ssc->sc_unit == -1)
315 /* generate TTY name string */
316 ksnprintf(ssc->sc_ttyname, sizeof(ssc->sc_ttyname),
317 UCOM_TTY_PREFIX "%d", ssc->sc_unit);
319 /* create USB request handling process */
320 error = usb_proc_create(&ssc->sc_tq, lock, "ucom", USB_PRI_MED);
322 ucom_unit_free(ssc->sc_unit);
325 ssc->sc_subunits = subunits;
326 ssc->sc_flag = UCOM_FLAG_ATTACHED |
329 if (callback->ucom_free == NULL)
330 ssc->sc_flag |= UCOM_FLAG_WAIT_REFS;
332 /* increment reference count */
335 for (subunit = 0; subunit < ssc->sc_subunits; subunit++) {
336 sc[subunit].sc_subunit = subunit;
337 sc[subunit].sc_super = ssc;
338 sc[subunit].sc_lock = lock;
339 sc[subunit].sc_parent = parent;
340 sc[subunit].sc_callback = callback;
342 error = ucom_attach_tty(ssc, &sc[subunit]);
344 ucom_detach(ssc, &sc[0]);
347 /* increment reference count */
350 /* set subunit attached */
351 sc[subunit].sc_flag |= UCOM_FLAG_ATTACHED;
354 DPRINTF("tp = %p, unit = %d, subunits = %d\n",
355 sc->sc_tty, ssc->sc_unit, ssc->sc_subunits);
361 * The following function will do nothing if the structure pointed to
362 * by "ssc" and "sc" is zero or has already been detached.
365 ucom_detach(struct ucom_super_softc *ssc, struct ucom_softc *sc)
369 if (!(ssc->sc_flag & UCOM_FLAG_ATTACHED))
370 return; /* not initialized */
372 if (ssc->sc_sysctl_ttyname != NULL) {
373 sysctl_remove_oid(ssc->sc_sysctl_ttyname, 1, 0);
374 ssc->sc_sysctl_ttyname = NULL;
377 if (ssc->sc_sysctl_ttyports != NULL) {
378 sysctl_remove_oid(ssc->sc_sysctl_ttyports, 1, 0);
379 ssc->sc_sysctl_ttyports = NULL;
382 usb_proc_drain(&ssc->sc_tq);
384 for (subunit = 0; subunit < ssc->sc_subunits; subunit++) {
385 if (sc[subunit].sc_flag & UCOM_FLAG_ATTACHED) {
387 ucom_detach_tty(ssc, &sc[subunit]);
389 /* avoid duplicate detach */
390 sc[subunit].sc_flag &= ~UCOM_FLAG_ATTACHED;
393 usb_proc_free(&ssc->sc_tq);
397 if (ssc->sc_flag & UCOM_FLAG_WAIT_REFS)
400 /* make sure we don't detach twice */
401 ssc->sc_flag &= ~UCOM_FLAG_ATTACHED;
405 ucom_drain(struct ucom_super_softc *ssc)
407 lockmgr(&ucom_lock, LK_EXCLUSIVE);
408 while (ssc->sc_refs > 0) {
409 kprintf("ucom: Waiting for a TTY device to close.\n");
410 usb_pause_mtx(&ucom_lock, hz);
412 lockmgr(&ucom_lock, LK_RELEASE);
416 ucom_drain_all(void *arg)
418 lockmgr(&ucom_lock, LK_EXCLUSIVE);
419 while (ucom_close_refs > 0) {
420 kprintf("ucom: Waiting for all detached TTY "
421 "devices to have open fds closed.\n");
422 usb_pause_mtx(&ucom_lock, hz);
424 lockmgr(&ucom_lock, LK_RELEASE);
428 ucom_attach_tty(struct ucom_super_softc *ssc, struct ucom_softc *sc)
431 char buf[32]; /* temporary TTY device name buffer */
434 kprintf("attach tty\n");
436 lwkt_gettoken(&tty_token);
439 sc->sc_tty = tp = ttymalloc(sc->sc_tty);
441 tp->t_oproc = ucom_start;
442 tp->t_param = ucom_param;
443 tp->t_stop = ucom_stop;
446 lwkt_reltoken(&tty_token);
450 /* Check if the client has a custom TTY name */
452 if (sc->sc_callback->ucom_tty_name) {
453 sc->sc_callback->ucom_tty_name(sc, buf,
454 sizeof(buf), ssc->sc_unit, sc->sc_subunit);
457 /* Use default TTY name */
458 if (ssc->sc_subunits > 1) {
459 /* multiple modems in one */
460 ksnprintf(buf, sizeof(buf), UCOM_TTY_PREFIX "%u.%u",
461 ssc->sc_unit, sc->sc_subunit);
464 ksnprintf(buf, sizeof(buf), UCOM_TTY_PREFIX "%u",
469 dev = make_dev(&ucom_ops, ssc->sc_unit | 0x80, // XXX UCOM_CALLOUT_MASK,
470 UID_UUCP, GID_DIALER, 0660,
476 DPRINTF("ttycreate: %s\n", buf);
478 /* Check if this device should be a console */
479 if ((ucom_cons_softc == NULL) &&
480 (ssc->sc_unit == ucom_cons_unit) &&
481 (sc->sc_subunit == ucom_cons_subunit)) {
483 DPRINTF("unit %d subunit %d is console",
484 ssc->sc_unit, sc->sc_subunit);
486 ucom_cons_softc = sc;
489 tty_init_console(tp, ucom_cons_baud);
491 tp->t_termios.c_ispeed = ucom_cons_baud;
492 tp->t_termios.c_ospeed = ucom_cons_baud;
494 UCOM_MTX_LOCK(ucom_cons_softc);
495 ucom_cons_rx_low = 0;
496 ucom_cons_rx_high = 0;
497 ucom_cons_tx_low = 0;
498 ucom_cons_tx_high = 0;
499 sc->sc_flag |= UCOM_FLAG_CONSOLE;
501 ucom_open(ucom_cons_softc);
502 ucom_param(tp, &tp->t_termios);
503 UCOM_MTX_UNLOCK(ucom_cons_softc);
506 lwkt_reltoken(&tty_token);
511 ucom_detach_tty(struct ucom_super_softc *ssc, struct ucom_softc *sc)
513 struct tty *tp = sc->sc_tty;
515 DPRINTF("sc = %p, tp = %p\n", sc, sc->sc_tty);
517 if (sc->sc_flag & UCOM_FLAG_CONSOLE) {
518 UCOM_MTX_LOCK(ucom_cons_softc);
519 ucom_close(ucom_cons_softc);
520 sc->sc_flag &= ~UCOM_FLAG_CONSOLE;
521 UCOM_MTX_UNLOCK(ucom_cons_softc);
522 ucom_cons_softc = NULL;
525 /* the config thread has been stopped when we get here */
528 sc->sc_flag |= UCOM_FLAG_GONE;
529 sc->sc_flag &= ~(UCOM_FLAG_HL_READY | UCOM_FLAG_LL_READY);
533 lockmgr(&ucom_lock, LK_EXCLUSIVE);
535 lockmgr(&ucom_lock, LK_RELEASE);
541 ucom_close(sc); /* close, if any */
548 * make sure that read and write transfers are stopped
550 if (sc->sc_callback->ucom_stop_read) {
551 (sc->sc_callback->ucom_stop_read) (sc);
553 if (sc->sc_callback->ucom_stop_write) {
554 (sc->sc_callback->ucom_stop_write) (sc);
561 ucom_set_pnpinfo_usb(struct ucom_super_softc *ssc, device_t dev)
565 struct usb_attach_arg *uaa;
567 ksnprintf(buf, sizeof(buf), "ttyname=" UCOM_TTY_PREFIX
568 "%d ttyports=%d", ssc->sc_unit, ssc->sc_subunits);
570 /* Store the PNP info in the first interface for the device */
571 uaa = device_get_ivars(dev);
572 iface_index = uaa->info.bIfaceIndex;
574 if (usbd_set_pnpinfo(uaa->device, iface_index, buf) != 0)
575 device_printf(dev, "Could not set PNP info\n");
578 * The following information is also replicated in the PNP-info
579 * string which is registered above:
581 if (ssc->sc_sysctl_ttyname == NULL) {
583 ssc->sc_sysctl_ttyname = SYSCTL_ADD_STRING(NULL,
584 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
585 OID_AUTO, "ttyname", CTLFLAG_RD, ssc->sc_ttyname, 0,
586 "TTY device basename");
589 if (ssc->sc_sysctl_ttyports == NULL) {
591 ssc->sc_sysctl_ttyports = SYSCTL_ADD_INT(NULL,
592 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
593 OID_AUTO, "ttyports", CTLFLAG_RD,
594 NULL, ssc->sc_subunits, "Number of ports");
600 ucom_queue_command(struct ucom_softc *sc,
601 usb_proc_callback_t *fn, struct termios *pt,
602 struct usb_proc_msg *t0, struct usb_proc_msg *t1)
604 struct ucom_super_softc *ssc = sc->sc_super;
605 struct ucom_param_task *task;
607 UCOM_MTX_ASSERT(sc, MA_OWNED);
609 if (usb_proc_is_gone(&ssc->sc_tq)) {
610 DPRINTF("proc is gone\n");
611 return; /* nothing to do */
614 * NOTE: The task cannot get executed before we drop the
615 * "sc_lock" lock. It is safe to update fields in the message
616 * structure after that the message got queued.
618 task = (struct ucom_param_task *)
619 usb_proc_msignal(&ssc->sc_tq, t0, t1);
621 /* Setup callback and softc pointers */
622 task->hdr.pm_callback = fn;
626 * Make a copy of the termios. This field is only present if
627 * the "pt" field is not NULL.
630 task->termios_copy = *pt;
633 * Closing the device should be synchronous.
635 if (fn == ucom_cfg_close)
636 usb_proc_mwait(&ssc->sc_tq, t0, t1);
639 * In case of multiple configure requests,
640 * keep track of the last one!
642 if (fn == ucom_cfg_start_transfers)
643 sc->sc_last_start_xfer = &task->hdr;
647 ucom_shutdown(struct ucom_softc *sc)
649 struct tty *tp = sc->sc_tty;
651 UCOM_MTX_ASSERT(sc, MA_OWNED);
656 * Hang up if necessary:
658 if (tp->t_termios.c_cflag & HUPCL) {
659 ucom_modem(tp, 0, SER_DTR);
666 * else: taskqueue is draining or gone
669 ucom_cfg_is_gone(struct ucom_softc *sc)
671 struct ucom_super_softc *ssc = sc->sc_super;
673 return (usb_proc_is_gone(&ssc->sc_tq));
677 ucom_cfg_start_transfers(struct usb_proc_msg *_task)
679 struct ucom_cfg_task *task =
680 (struct ucom_cfg_task *)_task;
681 struct ucom_softc *sc = task->sc;
683 if (!(sc->sc_flag & UCOM_FLAG_LL_READY)) {
686 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) {
687 /* TTY device closed */
691 if (_task == sc->sc_last_start_xfer)
692 sc->sc_flag |= UCOM_FLAG_GP_DATA;
694 if (sc->sc_callback->ucom_start_read) {
695 (sc->sc_callback->ucom_start_read) (sc);
697 if (sc->sc_callback->ucom_start_write) {
698 (sc->sc_callback->ucom_start_write) (sc);
703 ucom_start_transfers(struct ucom_softc *sc)
705 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) {
709 * Make sure that data transfers are started in both
712 if (sc->sc_callback->ucom_start_read) {
713 (sc->sc_callback->ucom_start_read) (sc);
715 if (sc->sc_callback->ucom_start_write) {
716 (sc->sc_callback->ucom_start_write) (sc);
721 ucom_cfg_open(struct usb_proc_msg *_task)
723 struct ucom_cfg_task *task =
724 (struct ucom_cfg_task *)_task;
725 struct ucom_softc *sc = task->sc;
729 if (sc->sc_flag & UCOM_FLAG_LL_READY) {
735 sc->sc_flag |= UCOM_FLAG_LL_READY;
737 if (sc->sc_callback->ucom_cfg_open) {
738 (sc->sc_callback->ucom_cfg_open) (sc);
741 usb_pause_mtx(sc->sc_lock, hz / 10);
747 ucom_dev_open(struct dev_open_args *ap)
749 cdev_t dev = ap->a_head.a_dev;
750 struct ucom_softc *sc = (struct ucom_softc *)dev->si_drv1;
754 error = ucom_open(sc);
761 ucom_open(struct ucom_softc *sc)
765 if (sc->sc_flag & UCOM_FLAG_GONE) {
768 if (sc->sc_flag & UCOM_FLAG_HL_READY) {
772 DPRINTF("tp = %p\n", sc->sc_tty);
774 if (sc->sc_callback->ucom_pre_open) {
776 * give the lower layer a chance to disallow TTY open, for
777 * example if the device is not present:
779 error = (sc->sc_callback->ucom_pre_open) (sc);
784 sc->sc_flag |= UCOM_FLAG_HL_READY;
786 /* Disable transfers */
787 sc->sc_flag &= ~UCOM_FLAG_GP_DATA;
793 /* reset programmed line state */
798 /* reset jitter buffer */
799 sc->sc_jitterbuf_in = 0;
800 sc->sc_jitterbuf_out = 0;
802 ucom_queue_command(sc, ucom_cfg_open, NULL,
803 &sc->sc_open_task[0].hdr,
804 &sc->sc_open_task[1].hdr);
806 /* Queue transfer enable command last */
807 ucom_queue_command(sc, ucom_cfg_start_transfers, NULL,
808 &sc->sc_start_task[0].hdr,
809 &sc->sc_start_task[1].hdr);
811 ucom_modem(sc->sc_tty, SER_DTR | SER_RTS, 0);
817 ucom_status_change(sc);
823 ucom_cfg_close(struct usb_proc_msg *_task)
825 struct ucom_cfg_task *task =
826 (struct ucom_cfg_task *)_task;
827 struct ucom_softc *sc = task->sc;
831 if (sc->sc_flag & UCOM_FLAG_LL_READY) {
832 sc->sc_flag &= ~UCOM_FLAG_LL_READY;
833 if (sc->sc_callback->ucom_cfg_close)
834 (sc->sc_callback->ucom_cfg_close) (sc);
841 ucom_dev_close(struct dev_close_args *ap)
843 cdev_t dev = ap->a_head.a_dev;
844 struct ucom_softc *sc = (struct ucom_softc *)dev->si_drv1;
848 error = ucom_close(sc);
855 ucom_close(struct ucom_softc *sc)
858 struct tty *tp = sc->sc_tty;
862 DPRINTF("tp=%p\n", tp);
864 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) {
865 DPRINTF("tp=%p already closed\n", tp);
870 ucom_queue_command(sc, ucom_cfg_close, NULL,
871 &sc->sc_close_task[0].hdr,
872 &sc->sc_close_task[1].hdr);
874 sc->sc_flag &= ~(UCOM_FLAG_HL_READY | UCOM_FLAG_RTS_IFLOW);
876 if (sc->sc_callback->ucom_stop_read) {
877 (sc->sc_callback->ucom_stop_read) (sc);
885 ucom_inwakeup(struct tty *tp)
887 struct ucom_softc *sc = tty_softc(tp);
893 UCOM_MTX_ASSERT(sc, MA_OWNED);
895 DPRINTF("tp=%p\n", tp);
897 if (ttydisc_can_bypass(tp) != 0 ||
898 (sc->sc_flag & UCOM_FLAG_HL_READY) == 0 ||
899 (sc->sc_flag & UCOM_FLAG_INWAKEUP) != 0) {
903 /* prevent recursion */
904 sc->sc_flag |= UCOM_FLAG_INWAKEUP;
906 pos = sc->sc_jitterbuf_out;
908 while (sc->sc_jitterbuf_in != pos) {
911 c = (char)sc->sc_jitterbuf[pos];
913 if (ttydisc_rint(tp, c, 0) == -1)
916 if (pos >= UCOM_JITTERBUF_SIZE)
917 pos -= UCOM_JITTERBUF_SIZE;
920 sc->sc_jitterbuf_out = pos;
922 /* clear RTS in async fashion */
923 if ((sc->sc_jitterbuf_in == pos) &&
924 (sc->sc_flag & UCOM_FLAG_RTS_IFLOW))
927 sc->sc_flag &= ~UCOM_FLAG_INWAKEUP;
932 ucom_dev_read(struct dev_read_args *ap)
934 cdev_t dev = ap->a_head.a_dev;
935 struct ucom_softc *sc;
939 sc = devclass_get_softc(ucom_devclass, minor(dev));
940 lwkt_gettoken(&tty_token);
943 DPRINTF("ucomread: tp = %p, flag = 0x%x\n", tp, ap->a_ioflag);
947 lwkt_reltoken(&tty_token);
951 error = (*linesw[tp->t_line].l_read)(tp, ap->a_uio, ap->a_ioflag);
953 DPRINTF("ucomread: error = %d\n", error);
955 lwkt_reltoken(&tty_token);
960 ucom_dev_write(struct dev_write_args *ap)
962 cdev_t dev = ap->a_head.a_dev;
963 struct ucom_softc *sc;
967 sc = devclass_get_softc(ucom_devclass, minor(dev));
968 lwkt_gettoken(&tty_token);
971 DPRINTF("ucomwrite: tp = %p, flag = 0x%x\n", tp, ap->a_ioflag);
975 lwkt_reltoken(&tty_token);
980 error = (*linesw[tp->t_line].l_write)(tp, ap->a_uio, ap->a_ioflag);
982 DPRINTF("ucomwrite: error = %d\n", error);
984 lwkt_reltoken(&tty_token);
989 ucom_dev_ioctl(struct dev_ioctl_args *ap)
991 cdev_t dev = ap->a_head.a_dev;
992 struct ucom_softc *sc = (struct ucom_softc *)dev->si_drv1;
993 u_long cmd = ap->a_cmd;
994 caddr_t data = ap->a_data;
995 struct tty *tp = sc->sc_tty;
999 lwkt_gettoken(&tty_token);
1001 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) {
1002 lwkt_reltoken(&tty_token);
1005 DPRINTF("cmd = 0x%08lx\n", cmd);
1007 error = (*linesw[tp->t_line].l_ioctl)(tp, ap->a_cmd, ap->a_data,
1008 ap->a_fflag, ap->a_cred);
1010 if (error != ENOIOCTL) {
1011 DPRINTF("ucomioctl: l_ioctl: error = %d\n", error);
1012 lwkt_reltoken(&tty_token);
1013 UCOM_MTX_UNLOCK(sc);
1019 error = ttioctl(tp, ap->a_cmd, ap->a_data, ap->a_fflag);
1020 /*disc_optim(tp, &tp->t_termios, sc); */
1021 if (error != ENOIOCTL) {
1023 DPRINTF("ucomioctl: ttioctl: error = %d\n", error);
1025 lwkt_reltoken(&tty_token);
1026 UCOM_MTX_UNLOCK(sc);
1052 if (sc->sc_callback->ucom_ioctl) {
1053 error = (sc->sc_callback->ucom_ioctl)
1054 (sc, cmd, data, 0, curthread);
1058 lwkt_reltoken(&tty_token);
1059 UCOM_MTX_UNLOCK(sc);
1070 lwkt_reltoken(&tty_token);
1071 UCOM_MTX_UNLOCK(sc);
1077 ucom_modem(struct tty *tp, int sigon, int sigoff)
1079 struct ucom_softc *sc;
1082 sc = devclass_get_softc(ucom_devclass, minor(tp->t_dev));
1084 UCOM_MTX_ASSERT(sc, MA_OWNED);
1086 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) {
1089 if ((sigon == 0) && (sigoff == 0)) {
1091 if (sc->sc_mcr & SER_DTR) {
1094 if (sc->sc_mcr & SER_RTS) {
1097 if (sc->sc_msr & SER_CTS) {
1100 if (sc->sc_msr & SER_DCD) {
1103 if (sc->sc_msr & SER_DSR) {
1106 if (sc->sc_msr & SER_RI) {
1111 if (sigon & SER_DTR) {
1112 sc->sc_mcr |= SER_DTR;
1114 if (sigoff & SER_DTR) {
1115 sc->sc_mcr &= ~SER_DTR;
1117 if (sigon & SER_RTS) {
1118 sc->sc_mcr |= SER_RTS;
1120 if (sigoff & SER_RTS) {
1121 sc->sc_mcr &= ~SER_RTS;
1123 onoff = (sc->sc_mcr & SER_DTR) ? 1 : 0;
1124 ucom_dtr(sc, onoff);
1126 onoff = (sc->sc_mcr & SER_RTS) ? 1 : 0;
1127 ucom_rts(sc, onoff);
1133 ucom_cfg_line_state(struct usb_proc_msg *_task)
1135 struct ucom_cfg_task *task =
1136 (struct ucom_cfg_task *)_task;
1137 struct ucom_softc *sc = task->sc;
1144 if (!(sc->sc_flag & UCOM_FLAG_LL_READY)) {
1149 /* compute callback mask */
1150 if (sc->sc_callback->ucom_cfg_set_dtr)
1151 mask |= UCOM_LS_DTR;
1152 if (sc->sc_callback->ucom_cfg_set_rts)
1153 mask |= UCOM_LS_RTS;
1154 if (sc->sc_callback->ucom_cfg_set_break)
1155 mask |= UCOM_LS_BREAK;
1156 if (sc->sc_callback->ucom_cfg_set_ring)
1157 mask |= UCOM_LS_RING;
1159 /* compute the bits we are to program */
1160 notch_bits = (sc->sc_pls_set & sc->sc_pls_clr) & mask;
1161 any_bits = (sc->sc_pls_set | sc->sc_pls_clr) & mask;
1162 prev_value = sc->sc_pls_curr ^ notch_bits;
1163 last_value = sc->sc_pls_curr;
1165 /* reset programmed line state */
1166 sc->sc_pls_curr = 0;
1170 /* ensure that we don't lose any levels */
1171 if (notch_bits & UCOM_LS_DTR)
1172 sc->sc_callback->ucom_cfg_set_dtr(sc,
1173 (prev_value & UCOM_LS_DTR) ? 1 : 0);
1174 if (notch_bits & UCOM_LS_RTS)
1175 sc->sc_callback->ucom_cfg_set_rts(sc,
1176 (prev_value & UCOM_LS_RTS) ? 1 : 0);
1177 if (notch_bits & UCOM_LS_BREAK)
1178 sc->sc_callback->ucom_cfg_set_break(sc,
1179 (prev_value & UCOM_LS_BREAK) ? 1 : 0);
1180 if (notch_bits & UCOM_LS_RING)
1181 sc->sc_callback->ucom_cfg_set_ring(sc,
1182 (prev_value & UCOM_LS_RING) ? 1 : 0);
1184 /* set last value */
1185 if (any_bits & UCOM_LS_DTR)
1186 sc->sc_callback->ucom_cfg_set_dtr(sc,
1187 (last_value & UCOM_LS_DTR) ? 1 : 0);
1188 if (any_bits & UCOM_LS_RTS)
1189 sc->sc_callback->ucom_cfg_set_rts(sc,
1190 (last_value & UCOM_LS_RTS) ? 1 : 0);
1191 if (any_bits & UCOM_LS_BREAK)
1192 sc->sc_callback->ucom_cfg_set_break(sc,
1193 (last_value & UCOM_LS_BREAK) ? 1 : 0);
1194 if (any_bits & UCOM_LS_RING)
1195 sc->sc_callback->ucom_cfg_set_ring(sc,
1196 (last_value & UCOM_LS_RING) ? 1 : 0);
1200 ucom_line_state(struct ucom_softc *sc,
1201 uint8_t set_bits, uint8_t clear_bits)
1203 UCOM_MTX_ASSERT(sc, MA_OWNED);
1205 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) {
1209 DPRINTF("on=0x%02x, off=0x%02x\n", set_bits, clear_bits);
1211 /* update current programmed line state */
1212 sc->sc_pls_curr |= set_bits;
1213 sc->sc_pls_curr &= ~clear_bits;
1214 sc->sc_pls_set |= set_bits;
1215 sc->sc_pls_clr |= clear_bits;
1217 /* defer driver programming */
1218 ucom_queue_command(sc, ucom_cfg_line_state, NULL,
1219 &sc->sc_line_state_task[0].hdr,
1220 &sc->sc_line_state_task[1].hdr);
1224 ucom_ring(struct ucom_softc *sc, uint8_t onoff)
1226 DPRINTF("onoff = %d\n", onoff);
1229 ucom_line_state(sc, UCOM_LS_RING, 0);
1231 ucom_line_state(sc, 0, UCOM_LS_RING);
1235 ucom_break(struct ucom_softc *sc, uint8_t onoff)
1237 DPRINTF("onoff = %d\n", onoff);
1240 ucom_line_state(sc, UCOM_LS_BREAK, 0);
1242 ucom_line_state(sc, 0, UCOM_LS_BREAK);
1246 ucom_dtr(struct ucom_softc *sc, uint8_t onoff)
1248 DPRINTF("onoff = %d\n", onoff);
1251 ucom_line_state(sc, UCOM_LS_DTR, 0);
1253 ucom_line_state(sc, 0, UCOM_LS_DTR);
1257 ucom_rts(struct ucom_softc *sc, uint8_t onoff)
1259 DPRINTF("onoff = %d\n", onoff);
1262 ucom_line_state(sc, UCOM_LS_RTS, 0);
1264 ucom_line_state(sc, 0, UCOM_LS_RTS);
1268 ucom_cfg_status_change(struct usb_proc_msg *_task)
1270 struct ucom_cfg_task *task =
1271 (struct ucom_cfg_task *)_task;
1272 struct ucom_softc *sc = task->sc;
1281 UCOM_MTX_ASSERT(sc, MA_OWNED);
1283 if (!(sc->sc_flag & UCOM_FLAG_LL_READY)) {
1286 if (sc->sc_callback->ucom_cfg_get_status == NULL) {
1294 (sc->sc_callback->ucom_cfg_get_status) (sc, &new_lsr, &new_msr);
1296 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) {
1297 /* TTY device closed */
1300 onoff = ((sc->sc_msr ^ new_msr) & SER_DCD);
1301 lsr_delta = (sc->sc_lsr ^ new_lsr);
1303 sc->sc_msr = new_msr;
1304 sc->sc_lsr = new_lsr;
1308 onoff = (sc->sc_msr & SER_DCD) ? 1 : 0;
1310 DPRINTF("DCD changed to %d\n", onoff);
1313 ttydisc_modem(tp, onoff);
1317 if ((lsr_delta & ULSR_BI) && (sc->sc_lsr & ULSR_BI)) {
1319 DPRINTF("BREAK detected\n");
1322 ttydisc_rint(tp, 0, TRE_BREAK);
1323 ttydisc_rint_done(tp);
1327 if ((lsr_delta & ULSR_FE) && (sc->sc_lsr & ULSR_FE)) {
1329 DPRINTF("Frame error detected\n");
1332 ttydisc_rint(tp, 0, TRE_FRAMING);
1333 ttydisc_rint_done(tp);
1337 if ((lsr_delta & ULSR_PE) && (sc->sc_lsr & ULSR_PE)) {
1339 DPRINTF("Parity error detected\n");
1342 ttydisc_rint(tp, 0, TRE_PARITY);
1343 ttydisc_rint_done(tp);
1349 ucom_status_change(struct ucom_softc *sc)
1351 UCOM_MTX_ASSERT(sc, MA_OWNED);
1353 if (sc->sc_flag & UCOM_FLAG_CONSOLE)
1354 return; /* not supported */
1356 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) {
1361 ucom_queue_command(sc, ucom_cfg_status_change, NULL,
1362 &sc->sc_status_task[0].hdr,
1363 &sc->sc_status_task[1].hdr);
1367 ucom_cfg_param(struct usb_proc_msg *_task)
1369 struct ucom_param_task *task =
1370 (struct ucom_param_task *)_task;
1371 struct ucom_softc *sc = task->sc;
1373 if (!(sc->sc_flag & UCOM_FLAG_LL_READY)) {
1376 if (sc->sc_callback->ucom_cfg_param == NULL) {
1380 (sc->sc_callback->ucom_cfg_param) (sc, &task->termios_copy);
1383 usb_pause_mtx(sc->sc_lock, hz / 10);
1387 ucom_param(struct tty *tp, struct termios *t)
1389 struct ucom_softc *sc;
1393 sc = devclass_get_softc(ucom_devclass, minor(tp->t_dev));
1395 lwkt_gettoken(&tty_token);
1396 UCOM_MTX_ASSERT(sc, MA_OWNED);
1401 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) {
1403 /* XXX the TTY layer should call "open()" first! */
1405 * Not quite: Its ordering is partly backwards, but
1406 * some parameters must be set early in ttydev_open(),
1407 * possibly before calling ttydevsw_open().
1409 error = ucom_open(sc);
1416 DPRINTF("sc = %p\n", sc);
1418 /* Check requested parameters. */
1419 if (t->c_ispeed && (t->c_ispeed != t->c_ospeed)) {
1420 /* XXX c_ospeed == 0 is perfectly valid. */
1421 DPRINTF("mismatch ispeed and ospeed\n");
1425 t->c_ispeed = t->c_ospeed;
1427 if (sc->sc_callback->ucom_pre_param) {
1428 /* Let the lower layer verify the parameters */
1429 error = (sc->sc_callback->ucom_pre_param) (sc, t);
1431 DPRINTF("callback error = %d\n", error);
1436 /* Disable transfers */
1437 sc->sc_flag &= ~UCOM_FLAG_GP_DATA;
1439 /* Queue baud rate programming command first */
1440 ucom_queue_command(sc, ucom_cfg_param, t,
1441 &sc->sc_param_task[0].hdr,
1442 &sc->sc_param_task[1].hdr);
1444 /* Queue transfer enable command last */
1445 ucom_queue_command(sc, ucom_cfg_start_transfers, NULL,
1446 &sc->sc_start_task[0].hdr,
1447 &sc->sc_start_task[1].hdr);
1449 if (t->c_cflag & CRTS_IFLOW) {
1450 sc->sc_flag |= UCOM_FLAG_RTS_IFLOW;
1451 } else if (sc->sc_flag & UCOM_FLAG_RTS_IFLOW) {
1452 sc->sc_flag &= ~UCOM_FLAG_RTS_IFLOW;
1453 ucom_modem(tp, SER_RTS, 0);
1462 lwkt_reltoken(&tty_token);
1467 ucom_start(struct tty *tp)
1469 struct ucom_softc *sc;
1471 sc = devclass_get_softc(ucom_devclass, minor(tp->t_dev));
1473 UCOM_MTX_ASSERT(sc, MA_OWNED);
1475 DPRINTF("sc = %p\n", sc);
1477 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) {
1478 /* The higher layer is not ready */
1481 ucom_start_transfers(sc);
1485 ucom_stop(struct tty *tp, int x)
1490 /*------------------------------------------------------------------------*
1494 * 0: No data is available.
1495 * Else: Data is available.
1496 *------------------------------------------------------------------------*/
1498 ucom_get_data(struct ucom_softc *sc, struct usb_page_cache *pc,
1499 uint32_t offset, uint32_t len, uint32_t *actlen)
1502 struct usb_page_search res;
1503 struct tty *tp = sc->sc_tty;
1505 uint32_t offset_orig;
1507 UCOM_MTX_ASSERT(sc, MA_OWNED);
1509 if (sc->sc_flag & UCOM_FLAG_CONSOLE) {
1512 /* get total TX length */
1514 temp = ucom_cons_tx_high - ucom_cons_tx_low;
1515 temp %= UCOM_CONS_BUFSIZE;
1517 /* limit TX length */
1519 if (temp > (UCOM_CONS_BUFSIZE - ucom_cons_tx_low))
1520 temp = (UCOM_CONS_BUFSIZE - ucom_cons_tx_low);
1527 usbd_copy_in(pc, offset, ucom_cons_tx_buf + ucom_cons_tx_low, temp);
1529 /* update counters */
1531 ucom_cons_tx_low += temp;
1532 ucom_cons_tx_low %= UCOM_CONS_BUFSIZE;
1534 /* store actual length */
1538 return (temp ? 1 : 0);
1542 !(sc->sc_flag & UCOM_FLAG_GP_DATA)) {
1544 return (0); /* multiport device polling */
1546 offset_orig = offset;
1550 usbd_get_page(pc, offset, &res);
1552 if (res.length > len) {
1555 /* copy data directly into USB buffer */
1557 cnt = ttydisc_getc(tp, res.buffer, res.length);
1562 if (cnt < res.length) {
1568 actlen[0] = offset - offset_orig;
1570 DPRINTF("cnt=%d\n", actlen[0]);
1572 if (actlen[0] == 0) {
1580 ucom_put_data(struct ucom_softc *sc, struct usb_page_cache *pc,
1581 uint32_t offset, uint32_t len)
1584 struct usb_page_search res;
1585 struct tty *tp = sc->sc_tty;
1589 UCOM_MTX_ASSERT(sc, MA_OWNED);
1591 if (sc->sc_flag & UCOM_FLAG_CONSOLE) {
1594 /* get maximum RX length */
1596 temp = (UCOM_CONS_BUFSIZE - 1) - ucom_cons_rx_high + ucom_cons_rx_low;
1597 temp %= UCOM_CONS_BUFSIZE;
1599 /* limit RX length */
1601 if (temp > (UCOM_CONS_BUFSIZE - ucom_cons_rx_high))
1602 temp = (UCOM_CONS_BUFSIZE - ucom_cons_rx_high);
1609 usbd_copy_out(pc, offset, ucom_cons_rx_buf + ucom_cons_rx_high, temp);
1611 /* update counters */
1613 ucom_cons_rx_high += temp;
1614 ucom_cons_rx_high %= UCOM_CONS_BUFSIZE;
1620 return; /* multiport device polling */
1623 return; /* no data */
1625 /* set a flag to prevent recursation ? */
1629 usbd_get_page(pc, offset, &res);
1631 if (res.length > len) {
1635 offset += res.length;
1637 /* pass characters to tty layer */
1642 /* first check if we can pass the buffer directly */
1644 if (ttydisc_can_bypass(tp)) {
1646 /* clear any jitter buffer */
1647 sc->sc_jitterbuf_in = 0;
1648 sc->sc_jitterbuf_out = 0;
1650 if (ttydisc_rint_bypass(tp, buf, cnt) != cnt) {
1651 DPRINTF("tp=%p, data lost\n", tp);
1657 for (cnt = 0; cnt != res.length; cnt++) {
1658 if (sc->sc_jitterbuf_in != sc->sc_jitterbuf_out ||
1659 ttydisc_rint(tp, buf[cnt], 0) == -1) {
1663 pos = sc->sc_jitterbuf_in;
1664 end = sc->sc_jitterbuf_out +
1665 UCOM_JITTERBUF_SIZE - 1;
1666 if (end >= UCOM_JITTERBUF_SIZE)
1667 end -= UCOM_JITTERBUF_SIZE;
1669 for (; cnt != res.length; cnt++) {
1672 sc->sc_jitterbuf[pos] = buf[cnt];
1674 if (pos >= UCOM_JITTERBUF_SIZE)
1675 pos -= UCOM_JITTERBUF_SIZE;
1678 sc->sc_jitterbuf_in = pos;
1680 /* set RTS in async fashion */
1681 if (sc->sc_flag & UCOM_FLAG_RTS_IFLOW)
1684 DPRINTF("tp=%p, lost %d "
1685 "chars\n", tp, res.length - cnt);
1690 ttydisc_rint_done(tp);
1696 ucom_free(void *xsc)
1698 struct ucom_softc *sc = xsc;
1700 if (sc->sc_callback->ucom_free != NULL)
1701 sc->sc_callback->ucom_free(sc);
1703 ucom_unref(sc->sc_super);
1705 lockmgr(&ucom_lock, LK_EXCLUSIVE);
1707 lockmgr(&ucom_lock, LK_RELEASE);
1710 static cn_probe_t ucom_cnprobe;
1711 static cn_init_t ucom_cninit;
1712 static cn_term_t ucom_cnterm;
1713 static cn_getc_t ucom_cngetc;
1714 static cn_putc_t ucom_cnputc;
1717 static cn_grab_t ucom_cngrab;
1718 static cn_ungrab_t ucom_cnungrab;
1719 CONSOLE_DRIVER(ucom);
1723 ucom_cnprobe(struct consdev *cp)
1725 if (ucom_cons_unit != -1)
1726 cp->cn_pri = CN_NORMAL;
1728 cp->cn_pri = CN_DEAD;
1731 strlcpy(cp->cn_name, "ucom", sizeof(cp->cn_name));
1736 ucom_cninit(struct consdev *cp)
1741 ucom_cnterm(struct consdev *cp)
1746 ucom_cngrab(struct consdev *cp)
1751 ucom_cnungrab(struct consdev *cp)
1756 ucom_cngetc(struct consdev *cd)
1758 struct ucom_softc *sc = ucom_cons_softc;
1766 if (ucom_cons_rx_low != ucom_cons_rx_high) {
1767 c = ucom_cons_rx_buf[ucom_cons_rx_low];
1768 ucom_cons_rx_low ++;
1769 ucom_cons_rx_low %= UCOM_CONS_BUFSIZE;
1774 /* start USB transfers */
1775 ucom_outwakeup(sc->sc_tty);
1777 UCOM_MTX_UNLOCK(sc);
1779 /* poll if necessary */
1781 if (kdb_active && sc->sc_callback->ucom_poll)
1782 (sc->sc_callback->ucom_poll) (sc);
1788 ucom_cnputc(void *cd, int c)
1790 ucom_cnputc(struct consdev *cd, int c)
1794 struct ucom_softc *sc = ucom_cons_softc;
1804 /* compute maximum TX length */
1806 temp = (UCOM_CONS_BUFSIZE - 1) - ucom_cons_tx_high + ucom_cons_tx_low;
1807 temp %= UCOM_CONS_BUFSIZE;
1810 ucom_cons_tx_buf[ucom_cons_tx_high] = c;
1811 ucom_cons_tx_high ++;
1812 ucom_cons_tx_high %= UCOM_CONS_BUFSIZE;
1815 /* start USB transfers */
1816 ucom_outwakeup(sc->sc_tty);
1818 UCOM_MTX_UNLOCK(sc);
1820 /* poll if necessary */
1822 if (kdb_active && sc->sc_callback->ucom_poll) {
1823 (sc->sc_callback->ucom_poll) (sc);
1824 /* simple flow control */
1831 /*------------------------------------------------------------------------*
1834 * This function will increment the super UCOM reference count.
1835 *------------------------------------------------------------------------*/
1837 ucom_ref(struct ucom_super_softc *ssc)
1839 lockmgr(&ucom_lock, LK_EXCLUSIVE);
1841 lockmgr(&ucom_lock, LK_RELEASE);
1844 /*------------------------------------------------------------------------*
1847 * This function will free the super UCOM's allocated unit
1848 * number. This function can be called on a zero-initialized
1849 * structure. This function can be called multiple times.
1850 *------------------------------------------------------------------------*/
1852 ucom_free_unit(struct ucom_super_softc *ssc)
1854 if (!(ssc->sc_flag & UCOM_FLAG_FREE_UNIT))
1857 ucom_unit_free(ssc->sc_unit);
1859 ssc->sc_flag &= ~UCOM_FLAG_FREE_UNIT;
1862 /*------------------------------------------------------------------------*
1865 * This function will decrement the super UCOM reference count.
1868 * 0: UCOM structures are still referenced.
1869 * Else: UCOM structures are no longer referenced.
1870 *------------------------------------------------------------------------*/
1872 ucom_unref(struct ucom_super_softc *ssc)
1876 lockmgr(&ucom_lock, LK_EXCLUSIVE);
1877 retval = (ssc->sc_refs < 2);
1879 lockmgr(&ucom_lock, LK_RELEASE);
1882 ucom_free_unit(ssc);
1889 #include <gdb/gdb.h>
1891 static gdb_probe_f ucom_gdbprobe;
1892 static gdb_init_f ucom_gdbinit;
1893 static gdb_term_f ucom_gdbterm;
1894 static gdb_getc_f ucom_gdbgetc;
1895 static gdb_putc_f ucom_gdbputc;
1897 GDB_DBGPORT(sio, ucom_gdbprobe, ucom_gdbinit, ucom_gdbterm, ucom_gdbgetc, ucom_gdbputc);
1902 return ((ucom_cons_softc != NULL) ? 0 : -1);
1918 ucom_cnputc(NULL, c);
1924 return (ucom_cngetc(NULL));