1 /* $NetBSD: ucom.c,v 1.40 2001/11/13 06:24:54 lukem Exp $ */
4 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD AND BSD-2-Clause-NetBSD
6 * Copyright (c) 2001-2003, 2005, 2008
7 * Shunsuke Akiyama <akiyama@jp.FreeBSD.org>.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD$");
36 * Copyright (c) 1998, 2000 The NetBSD Foundation, Inc.
37 * All rights reserved.
39 * This code is derived from software contributed to The NetBSD Foundation
40 * by Lennart Augustsson (lennart@augustsson.net) at
41 * Carlstedt Research & Technology.
43 * Redistribution and use in source and binary forms, with or without
44 * modification, are permitted provided that the following conditions
46 * 1. Redistributions of source code must retain the above copyright
47 * notice, this list of conditions and the following disclaimer.
48 * 2. Redistributions in binary form must reproduce the above copyright
49 * notice, this list of conditions and the following disclaimer in the
50 * documentation and/or other materials provided with the distribution.
52 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
53 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
54 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
55 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
56 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
57 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
58 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
59 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
60 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
61 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
62 * POSSIBILITY OF SUCH DAMAGE.
65 #include <sys/stdint.h>
66 #include <sys/stddef.h>
67 #include <sys/param.h>
68 #include <sys/queue.h>
69 #include <sys/types.h>
70 #include <sys/systm.h>
71 #include <sys/kernel.h>
73 #include <sys/module.h>
75 #include <sys/mutex.h>
76 #include <sys/condvar.h>
77 #include <sys/sysctl.h>
79 #include <sys/unistd.h>
80 #include <sys/callout.h>
81 #include <sys/malloc.h>
85 #include <dev/uart/uart_ppstypes.h>
87 #include <dev/usb/usb.h>
88 #include <dev/usb/usbdi.h>
89 #include <dev/usb/usbdi_util.h>
91 #define USB_DEBUG_VAR ucom_debug
92 #include <dev/usb/usb_debug.h>
93 #include <dev/usb/usb_busdma.h>
94 #include <dev/usb/usb_process.h>
96 #include <dev/usb/serial/usb_serial.h>
100 static SYSCTL_NODE(_hw_usb, OID_AUTO, ucom, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
103 static int ucom_pps_mode;
105 SYSCTL_INT(_hw_usb_ucom, OID_AUTO, pps_mode, CTLFLAG_RWTUN,
107 "pulse capture mode: 0/1/2=disabled/CTS/DCD; add 0x10 to invert");
109 static int ucom_device_mode_console = 1;
111 SYSCTL_INT(_hw_usb_ucom, OID_AUTO, device_mode_console, CTLFLAG_RW,
112 &ucom_device_mode_console, 0,
113 "set to 1 to mark terminals as consoles when in device mode");
116 static int ucom_debug = 0;
118 SYSCTL_INT(_hw_usb_ucom, OID_AUTO, debug, CTLFLAG_RWTUN,
119 &ucom_debug, 0, "ucom debug level");
122 #define UCOM_CONS_BUFSIZE 1024
124 static uint8_t ucom_cons_rx_buf[UCOM_CONS_BUFSIZE];
125 static uint8_t ucom_cons_tx_buf[UCOM_CONS_BUFSIZE];
127 static unsigned int ucom_cons_rx_low = 0;
128 static unsigned int ucom_cons_rx_high = 0;
130 static unsigned int ucom_cons_tx_low = 0;
131 static unsigned int ucom_cons_tx_high = 0;
133 static int ucom_cons_unit = -1;
134 static int ucom_cons_subunit = 0;
135 static int ucom_cons_baud = 9600;
136 static struct ucom_softc *ucom_cons_softc = NULL;
138 SYSCTL_INT(_hw_usb_ucom, OID_AUTO, cons_unit, CTLFLAG_RWTUN,
139 &ucom_cons_unit, 0, "console unit number");
140 SYSCTL_INT(_hw_usb_ucom, OID_AUTO, cons_subunit, CTLFLAG_RWTUN,
141 &ucom_cons_subunit, 0, "console subunit number");
142 SYSCTL_INT(_hw_usb_ucom, OID_AUTO, cons_baud, CTLFLAG_RWTUN,
143 &ucom_cons_baud, 0, "console baud rate");
145 static usb_proc_callback_t ucom_cfg_start_transfers;
146 static usb_proc_callback_t ucom_cfg_open;
147 static usb_proc_callback_t ucom_cfg_close;
148 static usb_proc_callback_t ucom_cfg_line_state;
149 static usb_proc_callback_t ucom_cfg_status_change;
150 static usb_proc_callback_t ucom_cfg_param;
152 static int ucom_unit_alloc(void);
153 static void ucom_unit_free(int);
154 static int ucom_attach_tty(struct ucom_super_softc *, struct ucom_softc *);
155 static void ucom_detach_tty(struct ucom_super_softc *, struct ucom_softc *);
156 static void ucom_queue_command(struct ucom_softc *,
157 usb_proc_callback_t *, struct termios *pt,
158 struct usb_proc_msg *t0, struct usb_proc_msg *t1);
159 static void ucom_shutdown(struct ucom_softc *);
160 static void ucom_ring(struct ucom_softc *, uint8_t);
161 static void ucom_break(struct ucom_softc *, uint8_t);
162 static void ucom_dtr(struct ucom_softc *, uint8_t);
163 static void ucom_rts(struct ucom_softc *, uint8_t);
165 static tsw_open_t ucom_open;
166 static tsw_close_t ucom_close;
167 static tsw_ioctl_t ucom_ioctl;
168 static tsw_modem_t ucom_modem;
169 static tsw_param_t ucom_param;
170 static tsw_outwakeup_t ucom_outwakeup;
171 static tsw_inwakeup_t ucom_inwakeup;
172 static tsw_free_t ucom_free;
173 static tsw_busy_t ucom_busy;
175 static struct ttydevsw ucom_class = {
176 .tsw_flags = TF_INITLOCK | TF_CALLOUT,
177 .tsw_open = ucom_open,
178 .tsw_close = ucom_close,
179 .tsw_outwakeup = ucom_outwakeup,
180 .tsw_inwakeup = ucom_inwakeup,
181 .tsw_ioctl = ucom_ioctl,
182 .tsw_param = ucom_param,
183 .tsw_modem = ucom_modem,
184 .tsw_free = ucom_free,
185 .tsw_busy = ucom_busy,
188 MODULE_DEPEND(ucom, usb, 1, 1, 1);
189 MODULE_VERSION(ucom, 1);
191 #define UCOM_UNIT_MAX 128 /* maximum number of units */
192 #define UCOM_TTY_PREFIX "U"
194 static struct unrhdr *ucom_unrhdr;
195 static struct mtx ucom_mtx;
196 static int ucom_close_refs;
202 ucom_unrhdr = new_unrhdr(0, UCOM_UNIT_MAX - 1, NULL);
203 mtx_init(&ucom_mtx, "UCOM MTX", NULL, MTX_DEF);
205 SYSINIT(ucom_init, SI_SUB_KLD - 1, SI_ORDER_ANY, ucom_init, NULL);
208 ucom_uninit(void *arg)
219 mtx_destroy(&ucom_mtx);
221 SYSUNINIT(ucom_uninit, SI_SUB_KLD - 3, SI_ORDER_ANY, ucom_uninit, NULL);
224 * Mark a unit number (the X in cuaUX) as in use.
226 * Note that devices using a different naming scheme (see ucom_tty_name()
227 * callback) still use this unit allocation.
230 ucom_unit_alloc(void)
235 if (ucom_unrhdr == NULL) {
236 DPRINTF("ucom_unrhdr is NULL\n");
239 unit = alloc_unr(ucom_unrhdr);
240 DPRINTF("unit %d is allocated\n", unit);
245 * Mark the unit number as not in use.
248 ucom_unit_free(int unit)
251 if (unit < 0 || unit >= UCOM_UNIT_MAX || ucom_unrhdr == NULL) {
252 DPRINTF("cannot free unit number\n");
255 DPRINTF("unit %d is freed\n", unit);
256 free_unr(ucom_unrhdr, unit);
260 * Setup a group of one or more serial ports.
262 * The mutex pointed to by "mtx" is applied before all
263 * callbacks are called back. Also "mtx" must be applied
264 * before calling into the ucom-layer!
267 ucom_attach(struct ucom_super_softc *ssc, struct ucom_softc *sc,
268 int subunits, void *parent,
269 const struct ucom_callback *callback, struct mtx *mtx)
276 (callback == NULL) ||
281 /* allocate a uniq unit number */
282 ssc->sc_unit = ucom_unit_alloc();
283 if (ssc->sc_unit == -1)
286 /* generate TTY name string */
287 snprintf(ssc->sc_ttyname, sizeof(ssc->sc_ttyname),
288 UCOM_TTY_PREFIX "%d", ssc->sc_unit);
290 /* create USB request handling process */
291 error = usb_proc_create(&ssc->sc_tq, mtx, "ucom", USB_PRI_MED);
293 ucom_unit_free(ssc->sc_unit);
296 ssc->sc_subunits = subunits;
297 ssc->sc_flag = UCOM_FLAG_ATTACHED |
298 UCOM_FLAG_FREE_UNIT | (ssc->sc_flag & UCOM_FLAG_DEVICE_MODE);
300 if (callback->ucom_free == NULL)
301 ssc->sc_flag |= UCOM_FLAG_WAIT_REFS;
303 /* increment reference count */
306 for (subunit = 0; subunit < ssc->sc_subunits; subunit++) {
307 sc[subunit].sc_subunit = subunit;
308 sc[subunit].sc_super = ssc;
309 sc[subunit].sc_mtx = mtx;
310 sc[subunit].sc_parent = parent;
311 sc[subunit].sc_callback = callback;
313 error = ucom_attach_tty(ssc, &sc[subunit]);
315 ucom_detach(ssc, &sc[0]);
318 /* increment reference count */
321 /* set subunit attached */
322 sc[subunit].sc_flag |= UCOM_FLAG_ATTACHED;
325 DPRINTF("tp = %p, unit = %d, subunits = %d\n",
326 sc->sc_tty, ssc->sc_unit, ssc->sc_subunits);
332 * The following function will do nothing if the structure pointed to
333 * by "ssc" and "sc" is zero or has already been detached.
336 ucom_detach(struct ucom_super_softc *ssc, struct ucom_softc *sc)
340 if (!(ssc->sc_flag & UCOM_FLAG_ATTACHED))
341 return; /* not initialized */
343 if (ssc->sc_sysctl_ttyname != NULL) {
344 sysctl_remove_oid(ssc->sc_sysctl_ttyname, 1, 0);
345 ssc->sc_sysctl_ttyname = NULL;
348 if (ssc->sc_sysctl_ttyports != NULL) {
349 sysctl_remove_oid(ssc->sc_sysctl_ttyports, 1, 0);
350 ssc->sc_sysctl_ttyports = NULL;
353 usb_proc_drain(&ssc->sc_tq);
355 for (subunit = 0; subunit < ssc->sc_subunits; subunit++) {
356 if (sc[subunit].sc_flag & UCOM_FLAG_ATTACHED) {
358 ucom_detach_tty(ssc, &sc[subunit]);
360 /* avoid duplicate detach */
361 sc[subunit].sc_flag &= ~UCOM_FLAG_ATTACHED;
364 usb_proc_free(&ssc->sc_tq);
368 if (ssc->sc_flag & UCOM_FLAG_WAIT_REFS)
371 /* make sure we don't detach twice */
372 ssc->sc_flag &= ~UCOM_FLAG_ATTACHED;
376 ucom_drain(struct ucom_super_softc *ssc)
379 while (ssc->sc_refs > 0) {
380 printf("ucom: Waiting for a TTY device to close.\n");
381 usb_pause_mtx(&ucom_mtx, hz);
383 mtx_unlock(&ucom_mtx);
387 ucom_drain_all(void *arg)
390 while (ucom_close_refs > 0) {
391 printf("ucom: Waiting for all detached TTY "
392 "devices to have open fds closed.\n");
393 usb_pause_mtx(&ucom_mtx, hz);
395 mtx_unlock(&ucom_mtx);
398 static cn_probe_t ucom_cnprobe;
399 static cn_init_t ucom_cninit;
400 static cn_term_t ucom_cnterm;
401 static cn_getc_t ucom_cngetc;
402 static cn_putc_t ucom_cnputc;
403 static cn_grab_t ucom_cngrab;
404 static cn_ungrab_t ucom_cnungrab;
406 const struct consdev_ops ucom_cnops = {
407 .cn_probe = ucom_cnprobe,
408 .cn_init = ucom_cninit,
409 .cn_term = ucom_cnterm,
410 .cn_getc = ucom_cngetc,
411 .cn_putc = ucom_cnputc,
412 .cn_grab = ucom_cngrab,
413 .cn_ungrab = ucom_cnungrab,
417 ucom_attach_tty(struct ucom_super_softc *ssc, struct ucom_softc *sc)
420 char buf[32]; /* temporary TTY device name buffer */
422 tp = tty_alloc_mutex(&ucom_class, sc, sc->sc_mtx);
426 /* Check if the client has a custom TTY name */
428 if (sc->sc_callback->ucom_tty_name) {
429 sc->sc_callback->ucom_tty_name(sc, buf,
430 sizeof(buf), ssc->sc_unit, sc->sc_subunit);
433 /* Use default TTY name */
434 if (ssc->sc_subunits > 1) {
435 /* multiple modems in one */
436 snprintf(buf, sizeof(buf), UCOM_TTY_PREFIX "%u.%u",
437 ssc->sc_unit, sc->sc_subunit);
440 snprintf(buf, sizeof(buf), UCOM_TTY_PREFIX "%u",
444 tty_makedev(tp, NULL, "%s", buf);
448 sc->sc_pps.ppscap = PPS_CAPTUREBOTH;
449 sc->sc_pps.driver_abi = PPS_ABI_VERSION;
450 sc->sc_pps.driver_mtx = sc->sc_mtx;
451 pps_init_abi(&sc->sc_pps);
453 DPRINTF("ttycreate: %s\n", buf);
455 /* Check if this device should be a console */
456 if ((ucom_cons_softc == NULL) &&
457 (ssc->sc_unit == ucom_cons_unit) &&
458 (sc->sc_subunit == ucom_cons_subunit)) {
460 DPRINTF("unit %d subunit %d is console",
461 ssc->sc_unit, sc->sc_subunit);
463 ucom_cons_softc = sc;
465 tty_init_console(tp, ucom_cons_baud);
467 UCOM_MTX_LOCK(ucom_cons_softc);
468 ucom_cons_rx_low = 0;
469 ucom_cons_rx_high = 0;
470 ucom_cons_tx_low = 0;
471 ucom_cons_tx_high = 0;
472 sc->sc_flag |= UCOM_FLAG_CONSOLE;
473 ucom_open(ucom_cons_softc->sc_tty);
474 ucom_param(ucom_cons_softc->sc_tty, &tp->t_termios_init_in);
475 UCOM_MTX_UNLOCK(ucom_cons_softc);
478 if ((ssc->sc_flag & UCOM_FLAG_DEVICE_MODE) != 0 &&
479 ucom_device_mode_console > 0 &&
480 ucom_cons_softc == NULL) {
483 cp = malloc(sizeof(struct consdev), M_USBDEV,
485 cp->cn_ops = &ucom_cnops;
487 cp->cn_pri = CN_NORMAL;
488 strlcpy(cp->cn_name, "tty", sizeof(cp->cn_name));
489 strlcat(cp->cn_name, buf, sizeof(cp->cn_name));
500 ucom_detach_tty(struct ucom_super_softc *ssc, struct ucom_softc *sc)
502 struct tty *tp = sc->sc_tty;
504 DPRINTF("sc = %p, tp = %p\n", sc, sc->sc_tty);
506 if (sc->sc_consdev != NULL) {
507 cnremove(sc->sc_consdev);
508 free(sc->sc_consdev, M_USBDEV);
509 sc->sc_consdev = NULL;
512 if (sc->sc_flag & UCOM_FLAG_CONSOLE) {
513 UCOM_MTX_LOCK(ucom_cons_softc);
514 ucom_close(ucom_cons_softc->sc_tty);
515 sc->sc_flag &= ~UCOM_FLAG_CONSOLE;
516 UCOM_MTX_UNLOCK(ucom_cons_softc);
517 ucom_cons_softc = NULL;
520 /* the config thread has been stopped when we get here */
523 sc->sc_flag |= UCOM_FLAG_GONE;
524 sc->sc_flag &= ~(UCOM_FLAG_HL_READY | UCOM_FLAG_LL_READY);
530 mtx_unlock(&ucom_mtx);
534 ucom_close(tp); /* close, if any */
540 * make sure that read and write transfers are stopped
542 if (sc->sc_callback->ucom_stop_read)
543 (sc->sc_callback->ucom_stop_read) (sc);
544 if (sc->sc_callback->ucom_stop_write)
545 (sc->sc_callback->ucom_stop_write) (sc);
551 ucom_set_pnpinfo_usb(struct ucom_super_softc *ssc, device_t dev)
555 struct usb_attach_arg *uaa;
557 snprintf(buf, sizeof(buf), "ttyname=" UCOM_TTY_PREFIX
558 "%d ttyports=%d", ssc->sc_unit, ssc->sc_subunits);
560 /* Store the PNP info in the first interface for the device */
561 uaa = device_get_ivars(dev);
562 iface_index = uaa->info.bIfaceIndex;
564 if (usbd_set_pnpinfo(uaa->device, iface_index, buf) != 0)
565 device_printf(dev, "Could not set PNP info\n");
568 * The following information is also replicated in the PNP-info
569 * string which is registered above:
571 if (ssc->sc_sysctl_ttyname == NULL) {
572 ssc->sc_sysctl_ttyname = SYSCTL_ADD_STRING(NULL,
573 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
574 OID_AUTO, "ttyname", CTLFLAG_RD, ssc->sc_ttyname, 0,
575 "TTY device basename");
577 if (ssc->sc_sysctl_ttyports == NULL) {
578 ssc->sc_sysctl_ttyports = SYSCTL_ADD_INT(NULL,
579 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
580 OID_AUTO, "ttyports", CTLFLAG_RD,
581 NULL, ssc->sc_subunits, "Number of ports");
586 ucom_set_usb_mode(struct ucom_super_softc *ssc, enum usb_hc_mode usb_mode)
590 case USB_MODE_DEVICE:
591 ssc->sc_flag |= UCOM_FLAG_DEVICE_MODE;
594 ssc->sc_flag &= ~UCOM_FLAG_DEVICE_MODE;
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_mtx" mutex. 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_mtx, hz / 10);
747 ucom_open(struct tty *tp)
749 struct ucom_softc *sc = tty_softc(tp);
752 UCOM_MTX_ASSERT(sc, MA_OWNED);
754 if (sc->sc_flag & UCOM_FLAG_GONE) {
757 if (sc->sc_flag & UCOM_FLAG_HL_READY) {
761 DPRINTF("tp = %p\n", tp);
763 if (sc->sc_callback->ucom_pre_open) {
765 * give the lower layer a chance to disallow TTY open, for
766 * example if the device is not present:
768 error = (sc->sc_callback->ucom_pre_open) (sc);
773 sc->sc_flag |= UCOM_FLAG_HL_READY;
775 /* Disable transfers */
776 sc->sc_flag &= ~UCOM_FLAG_GP_DATA;
782 /* reset programmed line state */
787 /* reset jitter buffer */
788 sc->sc_jitterbuf_in = 0;
789 sc->sc_jitterbuf_out = 0;
791 ucom_queue_command(sc, ucom_cfg_open, NULL,
792 &sc->sc_open_task[0].hdr,
793 &sc->sc_open_task[1].hdr);
795 /* Queue transfer enable command last */
796 ucom_queue_command(sc, ucom_cfg_start_transfers, NULL,
797 &sc->sc_start_task[0].hdr,
798 &sc->sc_start_task[1].hdr);
800 if (sc->sc_tty == NULL || (sc->sc_tty->t_termios.c_cflag & CNO_RTSDTR) == 0)
801 ucom_modem(tp, SER_DTR | SER_RTS, 0);
807 ucom_status_change(sc);
813 ucom_cfg_close(struct usb_proc_msg *_task)
815 struct ucom_cfg_task *task =
816 (struct ucom_cfg_task *)_task;
817 struct ucom_softc *sc = task->sc;
821 if (sc->sc_flag & UCOM_FLAG_LL_READY) {
822 sc->sc_flag &= ~UCOM_FLAG_LL_READY;
823 if (sc->sc_callback->ucom_cfg_close)
824 (sc->sc_callback->ucom_cfg_close) (sc);
831 ucom_close(struct tty *tp)
833 struct ucom_softc *sc = tty_softc(tp);
835 UCOM_MTX_ASSERT(sc, MA_OWNED);
837 DPRINTF("tp=%p\n", tp);
839 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) {
840 DPRINTF("tp=%p already closed\n", tp);
845 ucom_queue_command(sc, ucom_cfg_close, NULL,
846 &sc->sc_close_task[0].hdr,
847 &sc->sc_close_task[1].hdr);
849 sc->sc_flag &= ~(UCOM_FLAG_HL_READY | UCOM_FLAG_RTS_IFLOW);
851 if (sc->sc_callback->ucom_stop_read) {
852 (sc->sc_callback->ucom_stop_read) (sc);
857 ucom_inwakeup(struct tty *tp)
859 struct ucom_softc *sc = tty_softc(tp);
865 UCOM_MTX_ASSERT(sc, MA_OWNED);
867 DPRINTF("tp=%p\n", tp);
869 if (ttydisc_can_bypass(tp) != 0 ||
870 (sc->sc_flag & UCOM_FLAG_HL_READY) == 0 ||
871 (sc->sc_flag & UCOM_FLAG_INWAKEUP) != 0) {
875 /* prevent recursion */
876 sc->sc_flag |= UCOM_FLAG_INWAKEUP;
878 pos = sc->sc_jitterbuf_out;
880 while (sc->sc_jitterbuf_in != pos) {
883 c = (char)sc->sc_jitterbuf[pos];
885 if (ttydisc_rint(tp, c, 0) == -1)
888 if (pos >= UCOM_JITTERBUF_SIZE)
889 pos -= UCOM_JITTERBUF_SIZE;
892 sc->sc_jitterbuf_out = pos;
894 /* clear RTS in async fashion */
895 if ((sc->sc_jitterbuf_in == pos) &&
896 (sc->sc_flag & UCOM_FLAG_RTS_IFLOW))
899 sc->sc_flag &= ~UCOM_FLAG_INWAKEUP;
903 ucom_ioctl(struct tty *tp, u_long cmd, caddr_t data, struct thread *td)
905 struct ucom_softc *sc = tty_softc(tp);
908 UCOM_MTX_ASSERT(sc, MA_OWNED);
910 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) {
913 DPRINTF("cmd = 0x%08lx\n", cmd);
935 if (sc->sc_callback->ucom_ioctl) {
936 error = (sc->sc_callback->ucom_ioctl)
937 (sc, cmd, data, 0, td);
941 if (error == ENOIOCTL)
942 error = pps_ioctl(cmd, data, &sc->sc_pps);
949 ucom_modem(struct tty *tp, int sigon, int sigoff)
951 struct ucom_softc *sc = tty_softc(tp);
954 UCOM_MTX_ASSERT(sc, MA_OWNED);
956 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) {
959 if ((sigon == 0) && (sigoff == 0)) {
961 if (sc->sc_mcr & SER_DTR) {
964 if (sc->sc_mcr & SER_RTS) {
967 if (sc->sc_msr & SER_CTS) {
970 if (sc->sc_msr & SER_DCD) {
973 if (sc->sc_msr & SER_DSR) {
976 if (sc->sc_msr & SER_RI) {
981 if (sigon & SER_DTR) {
982 sc->sc_mcr |= SER_DTR;
984 if (sigoff & SER_DTR) {
985 sc->sc_mcr &= ~SER_DTR;
987 if (sigon & SER_RTS) {
988 sc->sc_mcr |= SER_RTS;
990 if (sigoff & SER_RTS) {
991 sc->sc_mcr &= ~SER_RTS;
993 onoff = (sc->sc_mcr & SER_DTR) ? 1 : 0;
996 onoff = (sc->sc_mcr & SER_RTS) ? 1 : 0;
1003 ucom_cfg_line_state(struct usb_proc_msg *_task)
1005 struct ucom_cfg_task *task =
1006 (struct ucom_cfg_task *)_task;
1007 struct ucom_softc *sc = task->sc;
1014 if (!(sc->sc_flag & UCOM_FLAG_LL_READY)) {
1019 /* compute callback mask */
1020 if (sc->sc_callback->ucom_cfg_set_dtr)
1021 mask |= UCOM_LS_DTR;
1022 if (sc->sc_callback->ucom_cfg_set_rts)
1023 mask |= UCOM_LS_RTS;
1024 if (sc->sc_callback->ucom_cfg_set_break)
1025 mask |= UCOM_LS_BREAK;
1026 if (sc->sc_callback->ucom_cfg_set_ring)
1027 mask |= UCOM_LS_RING;
1029 /* compute the bits we are to program */
1030 notch_bits = (sc->sc_pls_set & sc->sc_pls_clr) & mask;
1031 any_bits = (sc->sc_pls_set | sc->sc_pls_clr) & mask;
1032 prev_value = sc->sc_pls_curr ^ notch_bits;
1033 last_value = sc->sc_pls_curr;
1035 /* reset programmed line state */
1036 sc->sc_pls_curr = 0;
1040 /* ensure that we don't lose any levels */
1041 if (notch_bits & UCOM_LS_DTR)
1042 sc->sc_callback->ucom_cfg_set_dtr(sc,
1043 (prev_value & UCOM_LS_DTR) ? 1 : 0);
1044 if (notch_bits & UCOM_LS_RTS)
1045 sc->sc_callback->ucom_cfg_set_rts(sc,
1046 (prev_value & UCOM_LS_RTS) ? 1 : 0);
1047 if (notch_bits & UCOM_LS_BREAK)
1048 sc->sc_callback->ucom_cfg_set_break(sc,
1049 (prev_value & UCOM_LS_BREAK) ? 1 : 0);
1050 if (notch_bits & UCOM_LS_RING)
1051 sc->sc_callback->ucom_cfg_set_ring(sc,
1052 (prev_value & UCOM_LS_RING) ? 1 : 0);
1054 /* set last value */
1055 if (any_bits & UCOM_LS_DTR)
1056 sc->sc_callback->ucom_cfg_set_dtr(sc,
1057 (last_value & UCOM_LS_DTR) ? 1 : 0);
1058 if (any_bits & UCOM_LS_RTS)
1059 sc->sc_callback->ucom_cfg_set_rts(sc,
1060 (last_value & UCOM_LS_RTS) ? 1 : 0);
1061 if (any_bits & UCOM_LS_BREAK)
1062 sc->sc_callback->ucom_cfg_set_break(sc,
1063 (last_value & UCOM_LS_BREAK) ? 1 : 0);
1064 if (any_bits & UCOM_LS_RING)
1065 sc->sc_callback->ucom_cfg_set_ring(sc,
1066 (last_value & UCOM_LS_RING) ? 1 : 0);
1070 ucom_line_state(struct ucom_softc *sc,
1071 uint8_t set_bits, uint8_t clear_bits)
1073 UCOM_MTX_ASSERT(sc, MA_OWNED);
1075 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) {
1079 DPRINTF("on=0x%02x, off=0x%02x\n", set_bits, clear_bits);
1081 /* update current programmed line state */
1082 sc->sc_pls_curr |= set_bits;
1083 sc->sc_pls_curr &= ~clear_bits;
1084 sc->sc_pls_set |= set_bits;
1085 sc->sc_pls_clr |= clear_bits;
1087 /* defer driver programming */
1088 ucom_queue_command(sc, ucom_cfg_line_state, NULL,
1089 &sc->sc_line_state_task[0].hdr,
1090 &sc->sc_line_state_task[1].hdr);
1094 ucom_ring(struct ucom_softc *sc, uint8_t onoff)
1096 DPRINTF("onoff = %d\n", onoff);
1099 ucom_line_state(sc, UCOM_LS_RING, 0);
1101 ucom_line_state(sc, 0, UCOM_LS_RING);
1105 ucom_break(struct ucom_softc *sc, uint8_t onoff)
1107 DPRINTF("onoff = %d\n", onoff);
1110 ucom_line_state(sc, UCOM_LS_BREAK, 0);
1112 ucom_line_state(sc, 0, UCOM_LS_BREAK);
1116 ucom_dtr(struct ucom_softc *sc, uint8_t onoff)
1118 DPRINTF("onoff = %d\n", onoff);
1121 ucom_line_state(sc, UCOM_LS_DTR, 0);
1123 ucom_line_state(sc, 0, UCOM_LS_DTR);
1127 ucom_rts(struct ucom_softc *sc, uint8_t onoff)
1129 DPRINTF("onoff = %d\n", onoff);
1132 ucom_line_state(sc, UCOM_LS_RTS, 0);
1134 ucom_line_state(sc, 0, UCOM_LS_RTS);
1138 ucom_cfg_status_change(struct usb_proc_msg *_task)
1140 struct ucom_cfg_task *task =
1141 (struct ucom_cfg_task *)_task;
1142 struct ucom_softc *sc = task->sc;
1153 UCOM_MTX_ASSERT(sc, MA_OWNED);
1155 if (!(sc->sc_flag & UCOM_FLAG_LL_READY)) {
1158 if (sc->sc_callback->ucom_cfg_get_status == NULL) {
1166 (sc->sc_callback->ucom_cfg_get_status) (sc, &new_lsr, &new_msr);
1168 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) {
1169 /* TTY device closed */
1172 msr_delta = (sc->sc_msr ^ new_msr);
1173 lsr_delta = (sc->sc_lsr ^ new_lsr);
1175 sc->sc_msr = new_msr;
1176 sc->sc_lsr = new_lsr;
1179 * Time pulse counting support.
1181 switch(ucom_pps_mode & UART_PPS_SIGNAL_MASK) {
1183 pps_signal = SER_CTS;
1186 pps_signal = SER_DCD;
1193 if ((sc->sc_pps.ppsparam.mode & PPS_CAPTUREBOTH) &&
1194 (msr_delta & pps_signal)) {
1195 pps_capture(&sc->sc_pps);
1196 onoff = (sc->sc_msr & pps_signal) ? 1 : 0;
1197 if (ucom_pps_mode & UART_PPS_INVERT_PULSE)
1199 pps_event(&sc->sc_pps, onoff ? PPS_CAPTUREASSERT :
1203 if (msr_delta & SER_DCD) {
1205 onoff = (sc->sc_msr & SER_DCD) ? 1 : 0;
1207 DPRINTF("DCD changed to %d\n", onoff);
1209 ttydisc_modem(tp, onoff);
1212 if ((lsr_delta & ULSR_BI) && (sc->sc_lsr & ULSR_BI)) {
1214 DPRINTF("BREAK detected\n");
1216 ttydisc_rint(tp, 0, TRE_BREAK);
1217 ttydisc_rint_done(tp);
1220 if ((lsr_delta & ULSR_FE) && (sc->sc_lsr & ULSR_FE)) {
1222 DPRINTF("Frame error detected\n");
1224 ttydisc_rint(tp, 0, TRE_FRAMING);
1225 ttydisc_rint_done(tp);
1228 if ((lsr_delta & ULSR_PE) && (sc->sc_lsr & ULSR_PE)) {
1230 DPRINTF("Parity error detected\n");
1232 ttydisc_rint(tp, 0, TRE_PARITY);
1233 ttydisc_rint_done(tp);
1238 ucom_status_change(struct ucom_softc *sc)
1240 UCOM_MTX_ASSERT(sc, MA_OWNED);
1242 if (sc->sc_flag & UCOM_FLAG_CONSOLE)
1243 return; /* not supported */
1245 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) {
1250 ucom_queue_command(sc, ucom_cfg_status_change, NULL,
1251 &sc->sc_status_task[0].hdr,
1252 &sc->sc_status_task[1].hdr);
1256 ucom_cfg_param(struct usb_proc_msg *_task)
1258 struct ucom_param_task *task =
1259 (struct ucom_param_task *)_task;
1260 struct ucom_softc *sc = task->sc;
1262 if (!(sc->sc_flag & UCOM_FLAG_LL_READY)) {
1265 if (sc->sc_callback->ucom_cfg_param == NULL) {
1269 (sc->sc_callback->ucom_cfg_param) (sc, &task->termios_copy);
1272 usb_pause_mtx(sc->sc_mtx, hz / 10);
1276 ucom_param(struct tty *tp, struct termios *t)
1278 struct ucom_softc *sc = tty_softc(tp);
1282 UCOM_MTX_ASSERT(sc, MA_OWNED);
1287 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) {
1289 /* XXX the TTY layer should call "open()" first! */
1291 * Not quite: Its ordering is partly backwards, but
1292 * some parameters must be set early in ttydev_open(),
1293 * possibly before calling ttydevsw_open().
1295 error = ucom_open(tp);
1301 DPRINTF("sc = %p\n", sc);
1303 /* Check requested parameters. */
1304 if (t->c_ispeed && (t->c_ispeed != t->c_ospeed)) {
1305 /* XXX c_ospeed == 0 is perfectly valid. */
1306 DPRINTF("mismatch ispeed and ospeed\n");
1310 t->c_ispeed = t->c_ospeed;
1312 if (sc->sc_callback->ucom_pre_param) {
1313 /* Let the lower layer verify the parameters */
1314 error = (sc->sc_callback->ucom_pre_param) (sc, t);
1316 DPRINTF("callback error = %d\n", error);
1321 /* Disable transfers */
1322 sc->sc_flag &= ~UCOM_FLAG_GP_DATA;
1324 /* Queue baud rate programming command first */
1325 ucom_queue_command(sc, ucom_cfg_param, t,
1326 &sc->sc_param_task[0].hdr,
1327 &sc->sc_param_task[1].hdr);
1329 /* Queue transfer enable command last */
1330 ucom_queue_command(sc, ucom_cfg_start_transfers, NULL,
1331 &sc->sc_start_task[0].hdr,
1332 &sc->sc_start_task[1].hdr);
1334 if (t->c_cflag & CRTS_IFLOW) {
1335 sc->sc_flag |= UCOM_FLAG_RTS_IFLOW;
1336 } else if (sc->sc_flag & UCOM_FLAG_RTS_IFLOW) {
1337 sc->sc_flag &= ~UCOM_FLAG_RTS_IFLOW;
1338 ucom_modem(tp, SER_RTS, 0);
1350 ucom_outwakeup(struct tty *tp)
1352 struct ucom_softc *sc = tty_softc(tp);
1354 UCOM_MTX_ASSERT(sc, MA_OWNED);
1356 DPRINTF("sc = %p\n", sc);
1358 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) {
1359 /* The higher layer is not ready */
1362 ucom_start_transfers(sc);
1366 ucom_busy(struct tty *tp)
1368 struct ucom_softc *sc = tty_softc(tp);
1369 const uint8_t txidle = ULSR_TXRDY | ULSR_TSRE;
1371 UCOM_MTX_ASSERT(sc, MA_OWNED);
1373 DPRINTFN(3, "sc = %p lsr 0x%02x\n", sc, sc->sc_lsr);
1376 * If the driver maintains the txidle bits in LSR, we can use them to
1377 * determine whether the transmitter is busy or idle. Otherwise we have
1378 * to assume it is idle to avoid hanging forever on tcdrain(3).
1380 if (sc->sc_flag & UCOM_FLAG_LSRTXIDLE)
1381 return ((sc->sc_lsr & txidle) != txidle);
1386 /*------------------------------------------------------------------------*
1390 * 0: No data is available.
1391 * Else: Data is available.
1392 *------------------------------------------------------------------------*/
1394 ucom_get_data(struct ucom_softc *sc, struct usb_page_cache *pc,
1395 uint32_t offset, uint32_t len, uint32_t *actlen)
1397 struct usb_page_search res;
1398 struct tty *tp = sc->sc_tty;
1400 uint32_t offset_orig;
1402 UCOM_MTX_ASSERT(sc, MA_OWNED);
1404 if (sc->sc_flag & UCOM_FLAG_CONSOLE) {
1407 /* get total TX length */
1409 temp = ucom_cons_tx_high - ucom_cons_tx_low;
1410 temp %= UCOM_CONS_BUFSIZE;
1412 /* limit TX length */
1414 if (temp > (UCOM_CONS_BUFSIZE - ucom_cons_tx_low))
1415 temp = (UCOM_CONS_BUFSIZE - ucom_cons_tx_low);
1422 usbd_copy_in(pc, offset, ucom_cons_tx_buf + ucom_cons_tx_low, temp);
1424 /* update counters */
1426 ucom_cons_tx_low += temp;
1427 ucom_cons_tx_low %= UCOM_CONS_BUFSIZE;
1429 /* store actual length */
1433 return (temp ? 1 : 0);
1437 !(sc->sc_flag & UCOM_FLAG_GP_DATA)) {
1439 return (0); /* multiport device polling */
1441 offset_orig = offset;
1445 usbd_get_page(pc, offset, &res);
1447 if (res.length > len) {
1450 /* copy data directly into USB buffer */
1451 cnt = ttydisc_getc(tp, res.buffer, res.length);
1456 if (cnt < res.length) {
1462 actlen[0] = offset - offset_orig;
1464 DPRINTF("cnt=%d\n", actlen[0]);
1466 if (actlen[0] == 0) {
1473 ucom_put_data(struct ucom_softc *sc, struct usb_page_cache *pc,
1474 uint32_t offset, uint32_t len)
1476 struct usb_page_search res;
1477 struct tty *tp = sc->sc_tty;
1481 UCOM_MTX_ASSERT(sc, MA_OWNED);
1483 if (sc->sc_flag & UCOM_FLAG_CONSOLE) {
1486 /* get maximum RX length */
1488 temp = (UCOM_CONS_BUFSIZE - 1) - ucom_cons_rx_high + ucom_cons_rx_low;
1489 temp %= UCOM_CONS_BUFSIZE;
1491 /* limit RX length */
1493 if (temp > (UCOM_CONS_BUFSIZE - ucom_cons_rx_high))
1494 temp = (UCOM_CONS_BUFSIZE - ucom_cons_rx_high);
1501 usbd_copy_out(pc, offset, ucom_cons_rx_buf + ucom_cons_rx_high, temp);
1503 /* update counters */
1505 ucom_cons_rx_high += temp;
1506 ucom_cons_rx_high %= UCOM_CONS_BUFSIZE;
1512 return; /* multiport device polling */
1515 return; /* no data */
1517 /* set a flag to prevent recursation ? */
1521 usbd_get_page(pc, offset, &res);
1523 if (res.length > len) {
1527 offset += res.length;
1529 /* pass characters to tty layer */
1534 /* first check if we can pass the buffer directly */
1536 if (ttydisc_can_bypass(tp)) {
1538 /* clear any jitter buffer */
1539 sc->sc_jitterbuf_in = 0;
1540 sc->sc_jitterbuf_out = 0;
1542 if (ttydisc_rint_bypass(tp, buf, cnt) != cnt) {
1543 DPRINTF("tp=%p, data lost\n", tp);
1549 for (cnt = 0; cnt != res.length; cnt++) {
1550 if (sc->sc_jitterbuf_in != sc->sc_jitterbuf_out ||
1551 ttydisc_rint(tp, buf[cnt], 0) == -1) {
1555 pos = sc->sc_jitterbuf_in;
1556 end = sc->sc_jitterbuf_out +
1557 UCOM_JITTERBUF_SIZE - 1;
1558 if (end >= UCOM_JITTERBUF_SIZE)
1559 end -= UCOM_JITTERBUF_SIZE;
1561 for (; cnt != res.length; cnt++) {
1564 sc->sc_jitterbuf[pos] = buf[cnt];
1566 if (pos >= UCOM_JITTERBUF_SIZE)
1567 pos -= UCOM_JITTERBUF_SIZE;
1570 sc->sc_jitterbuf_in = pos;
1572 /* set RTS in async fashion */
1573 if (sc->sc_flag & UCOM_FLAG_RTS_IFLOW)
1576 DPRINTF("tp=%p, lost %d "
1577 "chars\n", tp, res.length - cnt);
1582 ttydisc_rint_done(tp);
1586 ucom_free(void *xsc)
1588 struct ucom_softc *sc = xsc;
1590 if (sc->sc_callback->ucom_free != NULL)
1591 sc->sc_callback->ucom_free(sc);
1593 ucom_unref(sc->sc_super);
1595 mtx_lock(&ucom_mtx);
1597 mtx_unlock(&ucom_mtx);
1600 CONSOLE_DRIVER(ucom);
1603 ucom_cnprobe(struct consdev *cp)
1605 if (ucom_cons_unit != -1)
1606 cp->cn_pri = CN_NORMAL;
1608 cp->cn_pri = CN_DEAD;
1610 strlcpy(cp->cn_name, "ucom", sizeof(cp->cn_name));
1614 ucom_cninit(struct consdev *cp)
1619 ucom_cnterm(struct consdev *cp)
1624 ucom_cngrab(struct consdev *cp)
1629 ucom_cnungrab(struct consdev *cp)
1634 ucom_cngetc(struct consdev *cd)
1636 struct ucom_softc *sc = ucom_cons_softc;
1644 if (ucom_cons_rx_low != ucom_cons_rx_high) {
1645 c = ucom_cons_rx_buf[ucom_cons_rx_low];
1646 ucom_cons_rx_low ++;
1647 ucom_cons_rx_low %= UCOM_CONS_BUFSIZE;
1652 /* start USB transfers */
1653 ucom_outwakeup(sc->sc_tty);
1655 UCOM_MTX_UNLOCK(sc);
1657 /* poll if necessary */
1658 if (USB_IN_POLLING_MODE_FUNC() && sc->sc_callback->ucom_poll)
1659 (sc->sc_callback->ucom_poll) (sc);
1665 ucom_cnputc(struct consdev *cd, int c)
1667 struct ucom_softc *sc = ucom_cons_softc;
1677 /* compute maximum TX length */
1679 temp = (UCOM_CONS_BUFSIZE - 1) - ucom_cons_tx_high + ucom_cons_tx_low;
1680 temp %= UCOM_CONS_BUFSIZE;
1683 ucom_cons_tx_buf[ucom_cons_tx_high] = c;
1684 ucom_cons_tx_high ++;
1685 ucom_cons_tx_high %= UCOM_CONS_BUFSIZE;
1688 /* start USB transfers */
1689 ucom_outwakeup(sc->sc_tty);
1691 UCOM_MTX_UNLOCK(sc);
1693 /* poll if necessary */
1694 if (USB_IN_POLLING_MODE_FUNC() && sc->sc_callback->ucom_poll) {
1695 (sc->sc_callback->ucom_poll) (sc);
1696 /* simple flow control */
1702 /*------------------------------------------------------------------------*
1705 * This function will increment the super UCOM reference count.
1706 *------------------------------------------------------------------------*/
1708 ucom_ref(struct ucom_super_softc *ssc)
1710 mtx_lock(&ucom_mtx);
1712 mtx_unlock(&ucom_mtx);
1715 /*------------------------------------------------------------------------*
1718 * This function will free the super UCOM's allocated unit
1719 * number. This function can be called on a zero-initialized
1720 * structure. This function can be called multiple times.
1721 *------------------------------------------------------------------------*/
1723 ucom_free_unit(struct ucom_super_softc *ssc)
1725 if (!(ssc->sc_flag & UCOM_FLAG_FREE_UNIT))
1728 ucom_unit_free(ssc->sc_unit);
1730 ssc->sc_flag &= ~UCOM_FLAG_FREE_UNIT;
1733 /*------------------------------------------------------------------------*
1736 * This function will decrement the super UCOM reference count.
1739 * 0: UCOM structures are still referenced.
1740 * Else: UCOM structures are no longer referenced.
1741 *------------------------------------------------------------------------*/
1743 ucom_unref(struct ucom_super_softc *ssc)
1747 mtx_lock(&ucom_mtx);
1748 retval = (ssc->sc_refs < 2);
1750 mtx_unlock(&ucom_mtx);
1753 ucom_free_unit(ssc);
1760 #include <gdb/gdb.h>
1762 static gdb_probe_f ucom_gdbprobe;
1763 static gdb_init_f ucom_gdbinit;
1764 static gdb_term_f ucom_gdbterm;
1765 static gdb_getc_f ucom_gdbgetc;
1766 static gdb_putc_f ucom_gdbputc;
1768 GDB_DBGPORT(sio, ucom_gdbprobe, ucom_gdbinit, ucom_gdbterm, ucom_gdbgetc, ucom_gdbputc);
1773 return ((ucom_cons_softc != NULL) ? 0 : -1);
1789 ucom_cnputc(NULL, c);
1795 return (ucom_cngetc(NULL));