2 * Cronyx-Sigma adapter driver for FreeBSD.
3 * Supports PPP/HDLC protocol in synchronous mode,
4 * and asyncronous channels with full modem control.
6 * Copyright (C) 1994 Cronyx Ltd.
7 * Author: Serge Vakulenko, <vak@zebub.msk.su>
9 * This software is distributed with NO WARRANTIES, not even the implied
10 * warranties for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
12 * Authors grant any other persons or organisations permission to use
13 * or modify this software as long as this message is kept with the software,
14 * all derivative works or modified versions.
16 * Version 1.9, Wed Oct 4 18:58:15 MSK 1995
18 * $FreeBSD: src/sys/i386/isa/cx.c,v 1.45.2.1 2001/02/26 04:23:09 jlemon Exp $
19 * $DragonFly: src/sys/dev/netif/cx/cx.c,v 1.20 2006/12/22 23:26:19 swildner Exp $
26 #include <sys/param.h>
27 #include <sys/systm.h>
28 #include <sys/kernel.h>
29 #include <sys/fcntl.h>
33 #include <sys/socket.h>
34 #include <sys/thread2.h>
37 #if defined(__DragonFly__) || defined(__FreeBSD__)
38 # if defined(__FreeBSD__) && __FreeBSD__ < 2
39 # include <machine/pio.h>
40 # define RB_GETC(q) getc(q)
44 # include <sys/ttystats.h>
45 # include <machine/inline.h>
46 # define tsleep(tp,pri,msg,x) ((tp)->t_state |= TS_WOPEN,\
47 ttysleep (tp, (caddr_t)&tp->t_rawq, pri, msg, x))
49 #if defined(__DragonFly__) || !defined (__FreeBSD__) || __FreeBSD__ >= 2
51 # define RB_LEN(q) ((q).c_cc)
52 # define RB_GETC(q) clist_getc(&q)
53 #ifndef TSA_CARR_ON /* FreeBSD 2.x before not long after 2.0.5 */
54 # define TSA_CARR_ON(tp) tp
55 # define TSA_OLOWAT(q) ((caddr_t)&(q)->t_out)
59 #include <machine/cronyx.h>
62 /* XXX imported from if_cx.c. */
63 void cxswitch (cx_chan_t *c, cx_soft_opt_t new);
66 void cxmint (cx_chan_t *c);
67 int cxrinta (cx_chan_t *c);
68 void cxtinta (cx_chan_t *c);
70 extern struct callout cxtimeout_ch;
73 # define print(s) kprintf s
75 # define print(s) {/*void*/}
78 #define DMABUFSZ (6*256) /* buffer size */
79 #define BYTE *(unsigned char*)&
80 #define UNIT(u) (minor(u) & 077)
83 extern cx_board_t cxboard [NCX]; /* adapter state structures */
84 extern cx_chan_t *cxchan [NCX*NCHAN]; /* unit to channel struct pointer */
85 #if defined(__DragonFly__) || __FreeBSD__ >= 2
86 static struct tty cx_tty [NCX*NCHAN]; /* tty data */
88 static d_open_t cxopen;
89 static d_close_t cxclose;
90 static d_ioctl_t cxioctl;
93 /* Don't make this static, since if_cx.c uses it. */
94 struct dev_ops cx_ops = {
95 { "cx", CDEV_MAJOR, D_TTY | D_KQFILTER },
102 .d_kqfilter = ttykqfilter
105 struct tty *cx_tty [NCX*NCHAN]; /* tty data */
108 static void cxoproc (struct tty *tp);
109 static void cxstop (struct tty *tp, int flag);
110 static int cxparam (struct tty *tp, struct termios *t);
113 cxopen (struct dev_open_args *ap)
115 cdev_t dev = ap->a_head.a_dev;
116 int unit = UNIT (dev);
117 cx_chan_t *c = cxchan[unit];
122 if (unit == UNIT_CTL) {
123 print (("cx: cxopen /dev/cronyx\n"));
126 if (unit >= NCX*NCHAN || !c || c->type==T_NONE)
128 port = c->chip->port;
129 print (("cx%d.%d: cxopen unit=%d\n", c->board->num, c->num, unit));
130 if (c->mode != M_ASYNC)
133 #if defined(__DragonFly__) || defined(__FreeBSD__)
134 #if defined(__DragonFly__) || __FreeBSD__ >= 2
135 c->ttyp = &cx_tty[unit];
137 c->ttyp = cx_tty[unit] = ttymalloc (cx_tty[unit]);
140 MALLOC (cx_tty[unit], struct tty*, sizeof (struct tty), M_DEVBUF, M_WAITOK);
141 bzero (cx_tty[unit], sizeof (*cx_tty[unit]));
142 c->ttyp = cx_tty[unit];
144 c->ttyp->t_oproc = cxoproc;
145 c->ttyp->t_stop = cxstop;
146 c->ttyp->t_param = cxparam;
148 dev->si_tty = c->ttyp;
151 MALLOC (c->ttydev, struct ttydevice_tmp*,
152 sizeof (struct ttydevice_tmp), M_DEVBUF, M_WAITOK);
153 bzero (c->ttydev, sizeof (*c->ttydev));
154 strcpy (c->ttydev->tty_name, "cx");
155 c->ttydev->tty_unit = unit;
156 c->ttydev->tty_base = unit;
157 c->ttydev->tty_count = 1;
158 c->ttydev->tty_ttys = c->ttyp;
159 tty_attach (c->ttydev);
164 if ((tp->t_state & TS_ISOPEN) && (tp->t_state & TS_XCLUDE) &&
165 suser_cred(ap->a_cred, 0))
167 if (! (tp->t_state & TS_ISOPEN)) {
169 if (tp->t_ispeed == 0) {
171 tp->t_termios = deftermios;
176 tp->t_cflag = CREAD | CS8 | HUPCL;
177 tp->t_ispeed = c->rxbaud;
178 tp->t_ospeed = c->txbaud;
181 cxparam (tp, &tp->t_termios);
186 if (! (tp->t_state & TS_ISOPEN)) {
188 * Compute optimal receiver buffer length.
189 * The best choice is rxbaud/400.
190 * Make it even, to avoid byte-wide DMA transfers.
191 * --------------------------
192 * Baud rate Buffer length
193 * --------------------------
201 * --------------------------
203 int rbsz = (c->rxbaud + 800 - 1) / 800 * 2;
206 else if (rbsz > DMABUFSZ)
209 /* Initialize channel, enable receiver. */
210 cx_cmd (port, CCR_INITCH | CCR_ENRX);
211 cx_cmd (port, CCR_INITCH | CCR_ENRX);
213 /* Start receiver. */
214 outw (ARBCNT(port), rbsz);
215 outw (BRBCNT(port), rbsz);
216 outw (ARBSTS(port), BSTS_OWN24);
217 outw (BRBSTS(port), BSTS_OWN24);
219 /* Enable interrupts. */
220 outb (IER(port), IER_RXD | IER_RET | IER_TXD | IER_MDM);
226 (*linesw[tp->t_line].l_modem)(tp, 1);
227 if (! (ap->a_oflags & O_NONBLOCK)) {
228 /* Lock the channel against cxconfig while we are
229 * waiting for carrier. */
231 while (!(tp->t_cflag & CLOCAL) && !(tp->t_state & TS_CARR_ON))
232 if ((error = tsleep (TSA_CARR_ON(tp), PCATCH,
235 c->sopt.lock = 0; /* Unlock the channel. */
237 print (("cx%d.%d: cxopen done csr=%b\n", c->board->num, c->num,
238 inb(CSR(c->chip->port)), CSRA_BITS));
242 #if defined(__DragonFly__) || __FreeBSD__ >= 2
243 error = (*linesw[tp->t_line].l_open) (dev, tp);
245 error = (*linesw[tp->t_line].l_open) (dev, tp, 0);
251 cxclose (struct dev_close_args *ap)
253 cdev_t dev = ap->a_head.a_dev;
254 int unit = UNIT (dev);
255 cx_chan_t *c = cxchan[unit];
258 if (unit == UNIT_CTL)
261 (*linesw[tp->t_line].l_close) (tp, ap->a_fflag);
264 * Transmitter continues sending the queued data. */
267 outb (CAR(c->chip->port), c->num & 3);
268 outb (IER(c->chip->port), IER_TXD | IER_MDM);
269 cx_cmd (c->chip->port, CCR_DISRX);
271 /* Clear DTR and RTS. */
272 if ((tp->t_cflag & HUPCL) || ! (tp->t_state & TS_ISOPEN)) {
277 /* Stop sending break. */
278 if (c->brk == BRK_SEND) {
280 if (! (tp->t_state & TS_BUSY))
289 cxioctl (struct dev_ioctl_args *ap)
291 cdev_t dev = ap->a_head.a_dev;
292 caddr_t data = ap->a_data;
293 int unit = UNIT (dev);
299 struct ifnet *master;
301 if (unit == UNIT_CTL) {
302 /* Process an ioctl request on /dev/cronyx */
303 cx_options_t *o = (cx_options_t*) data;
305 if (o->board >= NCX || o->channel >= NCHAN)
307 c = &cxboard[o->board].chan[o->channel];
308 if (c->type == T_NONE)
315 print (("cx%d.%d: CXIOCSETMODE\n", o->board, o->channel));
316 if (c->type == T_NONE)
318 if (c->type == T_ASYNC && o->mode != M_ASYNC)
320 if (o->mode == M_ASYNC)
327 /* Somebody is waiting for carrier? */
330 /* /dev/ttyXX is already opened by someone? */
331 if (c->mode == M_ASYNC && c->ttyp &&
332 (c->ttyp->t_state & TS_ISOPEN))
334 /* Network interface is up? */
335 if (c->mode != M_ASYNC && (c->ifp->if_flags & IFF_UP))
338 /* Find the master interface. */
339 master = *o->master ? ifunit (o->master) : c->ifp;
342 m = cxchan[master->if_dunit];
344 /* Leave the previous master queue. */
345 if (c->master != c->ifp) {
346 cx_chan_t *p = cxchan[c->master->if_dunit];
348 for (; p; p=p->slaveq)
350 p->slaveq = c->slaveq;
353 /* Set up new master. */
357 /* Join the new master queue. */
358 if (c->master != c->ifp) {
359 c->slaveq = m->slaveq;
364 c->rxbaud = o->rxbaud;
365 c->txbaud = o->txbaud;
372 case 0: c->board->if0type = o->iftype; break;
373 case 8: c->board->if8type = o->iftype; break;
376 cxswitch (c, o->sopt);
378 outb (IER(c->chip->port), 0);
383 st = (cx_stat_t*) data;
384 st->rintr = c->stat->rintr;
385 st->tintr = c->stat->tintr;
386 st->mintr = c->stat->mintr;
387 st->ibytes = c->stat->ibytes;
388 st->ipkts = c->stat->ipkts;
389 st->ierrs = c->stat->ierrs;
390 st->obytes = c->stat->obytes;
391 st->opkts = c->stat->opkts;
392 st->oerrs = c->stat->oerrs;
396 print (("cx%d.%d: CXIOCGETMODE\n", o->board, o->channel));
399 o->rxbaud = c->rxbaud;
400 o->txbaud = c->txbaud;
408 case 0: o->iftype = c->board->if0type; break;
409 case 8: o->iftype = c->board->if8type; break;
411 if (c->master != c->ifp)
412 strlcpy(o->master, c->master->if_xname, sizeof(o->master));
424 error = (*linesw[tp->t_line].l_ioctl) (tp, ap->a_cmd, data,
425 ap->a_fflag, ap->a_cred);
426 if (error != ENOIOCTL)
428 error = ttioctl (tp, ap->a_cmd, data, ap->a_fflag);
429 if (error != ENOIOCTL)
438 case TIOCSBRK: /* Start sending line break */
440 if (! (tp->t_state & TS_BUSY))
443 case TIOCCBRK: /* Stop sending line break */
445 if (! (tp->t_state & TS_BUSY))
448 case TIOCSDTR: /* Set DTR */
451 case TIOCCDTR: /* Clear DTR */
454 case TIOCMSET: /* Set DTR/RTS */
455 cx_chan_dtr (c, (*(int*)data & TIOCM_DTR) ? 1 : 0);
456 cx_chan_rts (c, (*(int*)data & TIOCM_RTS) ? 1 : 0);
458 case TIOCMBIS: /* Add DTR/RTS */
459 if (*(int*)data & TIOCM_DTR) cx_chan_dtr (c, 1);
460 if (*(int*)data & TIOCM_RTS) cx_chan_rts (c, 1);
462 case TIOCMBIC: /* Clear DTR/RTS */
463 if (*(int*)data & TIOCM_DTR) cx_chan_dtr (c, 0);
464 if (*(int*)data & TIOCM_RTS) cx_chan_rts (c, 0);
466 case TIOCMGET: /* Get modem status */
467 msv = inb (MSVR(c->chip->port));
468 *(int*)data = TIOCM_LE; /* always enabled while open */
469 if (msv & MSV_DSR) *(int*)data |= TIOCM_DSR;
470 if (msv & MSV_CTS) *(int*)data |= TIOCM_CTS;
471 if (msv & MSV_CD) *(int*)data |= TIOCM_CD;
472 if (c->dtr) *(int*)data |= TIOCM_DTR;
473 if (c->rts) *(int*)data |= TIOCM_RTS;
482 * Fill transmitter buffer with data.
485 cxout (cx_chan_t *c, char b)
487 unsigned char *buf, *p, sym;
488 unsigned short port = c->chip->port, len = 0, cnt_port, sts_port;
489 struct tty *tp = c->ttyp;
494 /* Choose the buffer. */
497 cnt_port = ATBCNT(port);
498 sts_port = ATBSTS(port);
501 cnt_port = BTBCNT(port);
502 sts_port = BTBSTS(port);
506 if (inb (sts_port) & BSTS_OWN24) {
507 tp->t_state |= TS_BUSY;
513 *buf++ = 0; /* extended transmit command */
514 *buf++ = 0x81; /* send break */
515 *buf++ = 0; /* extended transmit command */
516 *buf++ = 0x82; /* insert delay */
517 *buf++ = 250; /* 1/4 of second */
518 *buf++ = 0; /* extended transmit command */
519 *buf++ = 0x82; /* insert delay */
520 *buf++ = 250; /* + 1/4 of second */
525 *buf++ = 0; /* extended transmit command */
526 *buf++ = 0x83; /* stop break */
532 if (tp->t_iflag & IXOFF)
533 while (RB_LEN (tp->t_out) && p<buf+DMABUFSZ-1) {
534 sym = RB_GETC (tp->t_out);
535 /* Send XON/XOFF out of band. */
536 if (sym == tp->t_cc[VSTOP]) {
537 outb (STCR(port), STC_SNDSPC|STC_SSPC_2);
540 if (sym == tp->t_cc[VSTART]) {
541 outb (STCR(port), STC_SNDSPC|STC_SSPC_1);
544 /* Duplicate NULLs in ETC mode. */
550 while (RB_LEN (tp->t_out) && p<buf+DMABUFSZ-1) {
551 sym = RB_GETC (tp->t_out);
552 /* Duplicate NULLs in ETC mode. */
561 /* Start transmitter. */
563 outw (cnt_port, len);
564 outb (sts_port, BSTS_INTR | BSTS_OWN24);
565 c->stat->obytes += len;
566 tp->t_state |= TS_BUSY;
567 print (("cx%d.%d: out %d bytes to %c\n",
568 c->board->num, c->num, len, b));
573 cxoproc (struct tty *tp)
575 int unit = UNIT (tp->t_dev);
576 cx_chan_t *c = cxchan[unit];
577 unsigned short port = c->chip->port;
581 /* Set current channel number */
582 outb (CAR(port), c->num & 3);
584 if (! (tp->t_state & (TS_TIMEOUT | TS_TTSTOP))) {
585 /* Start transmitter. */
586 if (! (inb (CSR(port)) & CSRA_TXEN))
587 cx_cmd (port, CCR_ENTX);
589 /* Determine the buffer order. */
590 if (inb (DMABSTS(port)) & DMABSTS_NTBUF) {
598 #ifndef TS_ASLEEP /* FreeBSD some time after 2.0.5 */
601 if (RB_LEN (tp->t_out) <= tp->t_lowat) {
602 if (tp->t_state & TS_ASLEEP) {
603 tp->t_state &= ~TS_ASLEEP;
604 wakeup(TSA_OLOWAT(tp));
606 selwakeup(&tp->t_wsel);
613 cxparam (struct tty *tp, struct termios *t)
615 int unit = UNIT (tp->t_dev);
616 cx_chan_t *c = cxchan[unit];
617 unsigned short port = c->chip->port;
619 cx_cor1_async_t cor1;
621 if (t->c_ospeed == 0) {
622 /* Clear DTR and RTS. */
627 print (("cx%d.%d: cxparam (hangup)\n", c->board->num, c->num));
630 print (("cx%d.%d: cxparam\n", c->board->num, c->num));
632 /* Check requested parameters. */
633 if (t->c_ospeed < 300 || t->c_ospeed > 256*1024)
635 if (t->c_ispeed && (t->c_ispeed < 300 || t->c_ispeed > 256*1024))
639 /* CLOCAL flag set -- wakeup everybody who waits for CD. */
640 /* FreeBSD does this themselves. */
641 if (! (tp->t_cflag & CLOCAL) && (t->c_cflag & CLOCAL))
642 wakeup ((caddr_t) &tp->t_rawq);
644 /* And copy them to tty and channel structures. */
645 c->rxbaud = tp->t_ispeed = t->c_ispeed;
646 c->txbaud = tp->t_ospeed = t->c_ospeed;
647 tp->t_cflag = t->c_cflag;
649 /* Set character length and parity mode. */
651 switch (t->c_cflag & CSIZE) {
653 case CS8: cor1.charlen = 7; break;
654 case CS7: cor1.charlen = 6; break;
655 case CS6: cor1.charlen = 5; break;
656 case CS5: cor1.charlen = 4; break;
658 if (t->c_cflag & PARENB) {
659 cor1.parmode = PARM_NORMAL;
661 cor1.parity = (t->c_cflag & PARODD) ? PAR_ODD : PAR_EVEN;
663 cor1.parmode = PARM_NOPAR;
667 /* Enable/disable hardware CTS. */
668 c->aopt.cor2.ctsae = (t->c_cflag & CRTSCTS) ? 1 : 0;
669 /* Handle DSR as CTS. */
670 c->aopt.cor2.dsrae = (t->c_cflag & CRTSCTS) ? 1 : 0;
671 /* Enable extended transmit command mode.
672 * Unfortunately, there is no other method for sending break. */
673 c->aopt.cor2.etc = 1;
674 /* Enable/disable hardware XON/XOFF. */
675 c->aopt.cor2.ixon = (t->c_iflag & IXON) ? 1 : 0;
676 c->aopt.cor2.ixany = (t->c_iflag & IXANY) ? 1 : 0;
678 /* Set the number of stop bits. */
679 if (t->c_cflag & CSTOPB)
680 c->aopt.cor3.stopb = STOPB_2;
682 c->aopt.cor3.stopb = STOPB_1;
683 /* Disable/enable passing XON/XOFF chars to the host. */
684 c->aopt.cor3.scde = (t->c_iflag & IXON) ? 1 : 0;
685 c->aopt.cor3.flowct = (t->c_iflag & IXON) ? FLOWCC_NOTPASS : FLOWCC_PASS;
687 c->aopt.schr1 = t->c_cc[VSTART]; /* XON */
688 c->aopt.schr2 = t->c_cc[VSTOP]; /* XOFF */
690 /* Set current channel number. */
692 outb (CAR(port), c->num & 3);
694 /* Set up receiver clock values. */
695 cx_clock (c->chip->oscfreq, c->rxbaud, &clock, &period);
696 c->opt.rcor.clk = clock;
697 outb (RCOR(port), BYTE c->opt.rcor);
698 outb (RBPR(port), period);
700 /* Set up transmitter clock values. */
701 cx_clock (c->chip->oscfreq, c->txbaud, &clock, &period);
702 c->opt.tcor.clk = clock;
703 c->opt.tcor.ext1x = 0;
704 outb (TCOR(port), BYTE c->opt.tcor);
705 outb (TBPR(port), period);
707 outb (COR2(port), BYTE c->aopt.cor2);
708 outb (COR3(port), BYTE c->aopt.cor3);
709 outb (SCHR1(port), c->aopt.schr1);
710 outb (SCHR2(port), c->aopt.schr2);
712 if (BYTE c->aopt.cor1 != BYTE cor1) {
713 BYTE c->aopt.cor1 = BYTE cor1;
714 outb (COR1(port), BYTE c->aopt.cor1);
715 /* Any change to COR1 require reinitialization. */
716 /* Unfortunately, it may cause transmitter glitches... */
717 cx_cmd (port, CCR_INITCH);
725 * Stop output on a line
728 cxstop (struct tty *tp, int flag)
730 cx_chan_t *c = cxchan[UNIT(tp->t_dev)];
731 unsigned short port = c->chip->port;
735 if (tp->t_state & TS_BUSY) {
736 print (("cx%d.%d: cxstop\n", c->board->num, c->num));
738 /* Set current channel number */
739 outb (CAR(port), c->num & 3);
741 /* Stop transmitter */
742 cx_cmd (port, CCR_DISTX);
749 * Handle receive interrupts, including receive errors and
750 * receive timeout interrupt.
753 cxrinta (cx_chan_t *c)
755 unsigned short port = c->chip->port;
756 unsigned short len = 0, risr = inw (RISR(port)), reoir = 0;
757 struct tty *tp = c->ttyp;
759 /* Compute optimal receiver buffer length. */
760 int rbsz = (c->rxbaud + 800 - 1) / 800 * 2;
763 else if (rbsz > DMABUFSZ)
766 if (risr & RISA_TIMEOUT) {
767 unsigned long rcbadr = (unsigned short) inw (RCBADRL(port)) |
768 (long) inw (RCBADRU(port)) << 16;
769 unsigned char *buf = 0;
770 unsigned short cnt_port = 0, sts_port = 0;
771 if (rcbadr >= c->brphys && rcbadr < c->brphys+DMABUFSZ) {
773 len = rcbadr - c->brphys;
774 cnt_port = BRBCNT(port);
775 sts_port = BRBSTS(port);
776 } else if (rcbadr >= c->arphys && rcbadr < c->arphys+DMABUFSZ) {
778 len = rcbadr - c->arphys;
779 cnt_port = ARBCNT(port);
780 sts_port = ARBSTS(port);
782 kprintf ("cx%d.%d: timeout: invalid buffer address\n",
783 c->board->num, c->num);
786 print (("cx%d.%d: async receive timeout (%d bytes), risr=%b, arbsts=%b, brbsts=%b\n",
787 c->board->num, c->num, len, risr, RISA_BITS,
788 inb (ARBSTS(port)), BSTS_BITS, inb (BRBSTS(port)), BSTS_BITS));
789 c->stat->ibytes += len;
790 if (tp && (tp->t_state & TS_ISOPEN)) {
792 int (*rint)(int, struct tty *) =
793 linesw[tp->t_line].l_rint;
795 for (i=0; i<len; ++i)
796 (*rint) (buf[i], tp);
799 /* Restart receiver. */
800 outw (cnt_port, rbsz);
801 outb (sts_port, BSTS_OWN24);
803 return (REOI_TERMBUFF);
806 print (("cx%d.%d: async receive interrupt, risr=%b, arbsts=%b, brbsts=%b\n",
807 c->board->num, c->num, risr, RISA_BITS,
808 inb (ARBSTS(port)), BSTS_BITS, inb (BRBSTS(port)), BSTS_BITS));
810 if (risr & RIS_BUSERR) {
811 kprintf ("cx%d.%d: receive bus error\n", c->board->num, c->num);
814 if (risr & (RIS_OVERRUN | RISA_PARERR | RISA_FRERR | RISA_BREAK)) {
817 if (risr & RISA_PARERR)
819 if (risr & RISA_FRERR)
822 if (risr & RIS_OVERRUN)
826 if (risr & RISA_BREAK)
829 print (("cx%d.%d: receive error %x\n", c->board->num, c->num, err));
830 if (tp && (tp->t_state & TS_ISOPEN))
831 (*linesw[tp->t_line].l_rint) (err, tp);
835 /* Discard exception characters. */
836 if ((risr & RISA_SCMASK) && tp && (tp->t_iflag & IXON))
837 reoir |= REOI_DISCEXC;
839 /* Handle received data. */
840 if ((risr & RIS_EOBUF) && tp && (tp->t_state & TS_ISOPEN)) {
841 int (*rint)(int, struct tty *) = linesw[tp->t_line].l_rint;
845 len = (risr & RIS_BB) ? inw(BRBCNT(port)) : inw(ARBCNT(port));
847 print (("cx%d.%d: async: %d bytes received\n",
848 c->board->num, c->num, len));
849 c->stat->ibytes += len;
851 buf = (risr & RIS_BB) ? c->brbuf : c->arbuf;
852 for (i=0; i<len; ++i)
853 (*rint) (buf[i], tp);
856 /* Restart receiver. */
857 if (! (inb (ARBSTS(port)) & BSTS_OWN24)) {
858 outw (ARBCNT(port), rbsz);
859 outb (ARBSTS(port), BSTS_OWN24);
861 if (! (inb (BRBSTS(port)) & BSTS_OWN24)) {
862 outw (BRBCNT(port), rbsz);
863 outb (BRBSTS(port), BSTS_OWN24);
869 * Handle transmit interrupt.
871 void cxtinta (cx_chan_t *c)
873 struct tty *tp = c->ttyp;
874 unsigned short port = c->chip->port;
875 unsigned char tisr = inb (TISR(port));
877 print (("cx%d.%d: async transmit interrupt, tisr=%b, atbsts=%b, btbsts=%b\n",
878 c->board->num, c->num, tisr, TIS_BITS,
879 inb (ATBSTS(port)), BSTS_BITS, inb (BTBSTS(port)), BSTS_BITS));
881 if (tisr & TIS_BUSERR) {
882 kprintf ("cx%d.%d: transmit bus error\n",
883 c->board->num, c->num);
885 } else if (tisr & TIS_UNDERRUN) {
886 kprintf ("cx%d.%d: transmit underrun error\n",
887 c->board->num, c->num);
891 tp->t_state &= ~(TS_BUSY | TS_FLUSH);
893 (*linesw[tp->t_line].l_start) (tp);
900 * Handle modem interrupt.
903 cxmint (cx_chan_t *c)
905 unsigned short port = c->chip->port;
906 unsigned char misr = inb (MISR(port));
907 unsigned char msvr = inb (MSVR(port));
908 struct tty *tp = c->ttyp;
910 if (c->mode != M_ASYNC) {
911 kprintf ("cx%d.%d: unexpected modem interrupt, misr=%b, msvr=%b\n",
912 c->board->num, c->num, misr, MIS_BITS, msvr, MSV_BITS);
915 print (("cx%d.%d: modem interrupt, misr=%b, msvr=%b\n",
916 c->board->num, c->num, misr, MIS_BITS, msvr, MSV_BITS));
918 /* Ignore DSR events. */
919 /* Ignore RTC/CTS events, handled by hardware. */
920 /* Handle carrier detect/loss. */
921 if (tp && (misr & MIS_CCD))
922 (*linesw[tp->t_line].l_modem) (tp, (msvr & MSV_CD) != 0);
926 * Recover after lost transmit interrupts.
935 for (b = cxboard; b < cxboard + NCX; ++b) {
936 for (c = b->chan; c < b->chan + NCHAN; ++c) {
938 if (c->type == T_NONE || c->mode != M_ASYNC || !tp)
941 if (tp->t_state & TS_BUSY) {
942 tp->t_state &= ~TS_BUSY;
944 (*linesw[tp->t_line].l_start) (tp);
951 callout_reset (&cxtimeout_ch, hz * 5, cxtimeout, NULL);
955 #if defined(__DragonFly__) || (defined(__FreeBSD__) && (__FreeBSD__ > 1 ))
959 cx_drvinit(void *unused)
963 SYSINIT(cxdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,cx_drvinit,NULL)