/* * Cronyx-Sigma adapter driver for FreeBSD. * Supports PPP/HDLC protocol in synchronous mode, * and asyncronous channels with full modem control. * * Copyright (C) 1994 Cronyx Ltd. * Author: Serge Vakulenko, * * This software is distributed with NO WARRANTIES, not even the implied * warranties for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. * * Authors grant any other persons or organisations permission to use * or modify this software as long as this message is kept with the software, * all derivative works or modified versions. * * Version 1.2, Tue Nov 22 18:57:27 MSK 1994 */ #undef DEBUG #include "cx.h" #if NCX > 0 #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef __FreeBSD__ # if __FreeBSD__ < 2 # include # define RB_GETC(q) getc(q) # else /* BSD 4.4 Lite */ # include # endif # define oproc_func_t void(*)(struct tty*) #endif #ifdef __bsdi__ # include # include # define tsleep(tp,pri,msg,x) ((tp)->t_state |= TS_WOPEN,\ ttysleep (tp, (caddr_t)&tp->t_rawq, pri, msg, x)) # define oproc_func_t int(*)() # define timeout_func_t void(*)() #endif #if !defined (__FreeBSD__) || __FreeBSD__ >= 2 # define t_out t_outq # define RB_LEN(q) ((q).c_cc) # define RB_GETC(q) getc(&q) # define TSA_CARR_ON(tp) tp # define TSA_OLOWAT(q) ((caddr_t)&(q)->t_out) #endif #include #include #ifdef DEBUG # define print(s) printf s #else # define print(s) /*void*/ #endif #define DMABUFSZ (6*256) /* buffer size */ #define BYTE *(unsigned char*)& #define UNIT(u) ((u) & 077) #define UNIT_CTL 077 extern cx_board_t cxboard [NCX]; /* adapter state structures */ extern cx_chan_t *cxchan [NCX*NCHAN]; /* unit to channel struct pointer */ #if __FreeBSD__ >= 2 extern struct kern_devconf kdc_cx [NCX]; struct tty cx_tty [NCX*NCHAN]; /* tty data */ #else struct tty *cx_tty [NCX*NCHAN]; /* tty data */ #endif void cxoproc (struct tty *tp); int cxparam (struct tty *tp, struct termios *t); void cxswitch (cx_chan_t *c, cx_soft_opt_t new); int cxopen (dev_t dev, int flag, int mode, struct proc *p) { int unit = UNIT (dev); cx_chan_t *c = cxchan[unit]; unsigned short port; struct tty *tp; int error = 0; if (unit == UNIT_CTL) { print (("cx: cxopen /dev/cronyx\n")); return (0); } if (unit >= NCX*NCHAN || !c || c->type==T_NONE) return (ENXIO); port = c->chip->port; print (("cx%d.%d: cxopen unit=%d\n", c->board->num, c->num, unit)); if (c->mode != M_ASYNC) return (EBUSY); if (! c->ttyp) { #if __FreeBSD__ >= 2 c->ttyp = &cx_tty[unit]; #else MALLOC (cx_tty[unit], struct tty*, sizeof (struct tty), M_DEVBUF, M_WAITOK); bzero (cx_tty[unit], sizeof (*cx_tty[unit])); c->ttyp = cx_tty[unit]; #endif c->ttyp->t_oproc = (oproc_func_t) cxoproc; c->ttyp->t_param = cxparam; } #ifdef __bsdi__ if (! c->ttydev) { MALLOC (c->ttydev, struct ttydevice_tmp*, sizeof (struct ttydevice_tmp), M_DEVBUF, M_WAITOK); bzero (c->ttydev, sizeof (*c->ttydev)); strcpy (c->ttydev->tty_name, "cx"); c->ttydev->tty_unit = unit; c->ttydev->tty_base = unit; c->ttydev->tty_count = 1; c->ttydev->tty_ttys = c->ttyp; tty_attach (c->ttydev); } #endif tp = c->ttyp; tp->t_dev = dev; if ((tp->t_state & TS_ISOPEN) && (tp->t_state & TS_XCLUDE) && p->p_ucred->cr_uid != 0) return (EBUSY); if (! (tp->t_state & TS_ISOPEN)) { ttychars (tp); if (tp->t_ispeed == 0) { #ifdef __bsdi__ tp->t_termios = deftermios; #else tp->t_iflag = 0; tp->t_oflag = 0; tp->t_lflag = 0; tp->t_cflag = CREAD | CS8 | HUPCL; tp->t_ispeed = c->rxbaud; tp->t_ospeed = c->txbaud; #endif } cxparam (tp, &tp->t_termios); ttsetwater (tp); } spltty (); if (! (tp->t_state & TS_ISOPEN)) { /* * Compute optimal receiver buffer length. * The best choice is rxbaud/400. * Make it even, to avoid byte-wide DMA transfers. * -------------------------- * Baud rate Buffer length * -------------------------- * 300 4 * 1200 4 * 9600 24 * 19200 48 * 38400 96 * 57600 192 * 115200 288 * -------------------------- */ int rbsz = (c->rxbaud + 800 - 1) / 800 * 2; if (rbsz < 4) rbsz = 4; else if (rbsz > DMABUFSZ) rbsz = DMABUFSZ; /* Initialize channel, enable receiver. */ cx_cmd (port, CCR_INITCH | CCR_ENRX); cx_cmd (port, CCR_INITCH | CCR_ENRX); /* Start receiver. */ outw (ARBCNT(port), rbsz); outw (BRBCNT(port), rbsz); outw (ARBSTS(port), BSTS_OWN24); outw (BRBSTS(port), BSTS_OWN24); /* Enable interrupts. */ outb (IER(port), IER_RXD | IER_RET | IER_TXD | IER_MDM); cx_chan_dtr (c, 1); cx_chan_rts (c, 1); } if (cx_chan_cd (c)) tp->t_state |= TS_CARR_ON; if (! (flag & O_NONBLOCK)) { /* Lock the channel against cxconfig while we are * waiting for carrier. */ c->sopt.lock = 1; while (!(tp->t_cflag & CLOCAL) && !(tp->t_state & TS_CARR_ON)) if ((error = tsleep (TSA_CARR_ON(tp), TTIPRI | PCATCH, "cxdcd", 0))) break; c->sopt.lock = 0; /* Unlock the channel. */ } print (("cx%d.%d: cxopen done csr=%b\n", c->board->num, c->num, inb(CSR(c->chip->port)), CSRA_BITS)); spl0 (); if (error) return (error); #if __FreeBSD__ >= 2 error = (*linesw[tp->t_line].l_open) (dev, tp); if (tp->t_state & TS_ISOPEN) /* Mark the board busy on the first startup. * Never goes idle. */ kdc_cx[c->board->num].kdc_state = DC_BUSY; #else error = (*linesw[tp->t_line].l_open) (dev, tp, 0); #endif return (error); } int cxclose (dev_t dev, int flag, int mode, struct proc *p) { int unit = UNIT (dev); cx_chan_t *c = cxchan[unit]; struct tty *tp; int s; if (unit == UNIT_CTL) return (0); tp = c->ttyp; (*linesw[tp->t_line].l_close) (tp, flag); /* Disable receiver. * Transmitter continues sending the queued data. */ s = spltty (); outb (CAR(c->chip->port), c->num & 3); outb (IER(c->chip->port), IER_TXD | IER_MDM); cx_cmd (c->chip->port, CCR_DISRX); /* Clear DTR and RTS. */ if ((tp->t_cflag & HUPCL) || ! (tp->t_state & TS_ISOPEN)) { cx_chan_dtr (c, 0); cx_chan_rts (c, 0); } /* Stop sending break. */ if (c->brk == BRK_SEND) { c->brk = BRK_STOP; if (! (tp->t_state & TS_BUSY)) cxoproc (tp); } splx (s); ttyclose (tp); return (0); } int cxread (dev_t dev, struct uio *uio, int flag) { int unit = UNIT (dev); struct tty *tp; if (unit == UNIT_CTL) return (EIO); tp = cxchan[unit]->ttyp; return ((*linesw[tp->t_line].l_read) (tp, uio, flag)); } int cxwrite (dev_t dev, struct uio *uio, int flag) { int unit = UNIT (dev); struct tty *tp; if (unit == UNIT_CTL) return (EIO); tp = cxchan[unit]->ttyp; return ((*linesw[tp->t_line].l_write) (tp, uio, flag)); } int cxioctl (dev_t dev, int cmd, caddr_t data, int flag, struct proc *p) { int unit = UNIT (dev); cx_chan_t *c; struct tty *tp; int error, s; unsigned char msv; if (unit == UNIT_CTL) { /* Process an ioctl request on /dev/cronyx */ cx_options_t *o = (cx_options_t*) data; if (o->board >= NCX || o->channel >= NCHAN) return (EINVAL); c = &cxboard[o->board].chan[o->channel]; if (c->type == T_NONE) return (ENXIO); switch (cmd) { default: return (EINVAL); case CXIOCSETMODE: print (("cx%d.%d: CXIOCSETMODE\n", o->board, o->channel)); if (c->type == T_NONE) return (EINVAL); if (c->type == T_ASYNC && o->mode != M_ASYNC) return (EINVAL); if (o->mode == M_ASYNC) switch (c->type) { case T_SYNC_RS232: case T_SYNC_V35: case T_SYNC_RS449: return (EINVAL); } /* Somebody is waiting for carrier? */ if (c->sopt.lock) return (EBUSY); /* /dev/ttyXX is already opened by someone? */ if (c->mode == M_ASYNC && c->ttyp && (c->ttyp->t_state & TS_ISOPEN)) return (EBUSY); /* Network interface is up? */ if (c->mode != M_ASYNC && (c->ifp->if_flags & IFF_UP)) return (EBUSY); c->mode = o->mode; c->rxbaud = o->rxbaud; c->txbaud = o->txbaud; c->opt = o->opt; c->aopt = o->aopt; c->hopt = o->hopt; c->bopt = o->bopt; c->xopt = o->xopt; switch (c->num) { case 0: c->board->if0type = o->iftype; break; case 8: c->board->if8type = o->iftype; break; } cxswitch (c, o->sopt); s = spltty (); cx_setup_chan (c); outb (IER(c->chip->port), 0); splx (s); break; case CXIOCGETMODE: print (("cx%d.%d: CXIOCGETMODE\n", o->board, o->channel)); o->type = c->type; o->mode = c->mode; o->rxbaud = c->rxbaud; o->txbaud = c->txbaud; o->opt = c->opt; o->aopt = c->aopt; o->hopt = c->hopt; o->bopt = c->bopt; o->xopt = c->xopt; o->sopt = c->sopt; switch (c->num) { case 0: o->iftype = c->board->if0type; break; case 8: o->iftype = c->board->if8type; break; } break; } return (0); } c = cxchan[unit]; tp = c->ttyp; if (! tp) return (EINVAL); #if __FreeBSD__ >= 2 error = (*linesw[tp->t_line].l_ioctl) (tp, cmd, data, flag, p); #else error = (*linesw[tp->t_line].l_ioctl) (tp, cmd, data, flag); #endif if (error >= 0) return (error); error = ttioctl (tp, cmd, data, flag); if (error >= 0) return (error); s = spltty (); switch (cmd) { default: splx (s); return (ENOTTY); case TIOCSBRK: /* Start sending line break */ c->brk = BRK_SEND; if (! (tp->t_state & TS_BUSY)) cxoproc (tp); break; case TIOCCBRK: /* Stop sending line break */ c->brk = BRK_STOP; if (! (tp->t_state & TS_BUSY)) cxoproc (tp); break; case TIOCSDTR: /* Set DTR */ cx_chan_dtr (c, 1); break; case TIOCCDTR: /* Clear DTR */ cx_chan_dtr (c, 0); break; case TIOCMSET: /* Set DTR/RTS */ cx_chan_dtr (c, (*(int*)data & TIOCM_DTR) ? 1 : 0); cx_chan_rts (c, (*(int*)data & TIOCM_RTS) ? 1 : 0); break; case TIOCMBIS: /* Add DTR/RTS */ if (*(int*)data & TIOCM_DTR) cx_chan_dtr (c, 1); if (*(int*)data & TIOCM_RTS) cx_chan_rts (c, 1); break; case TIOCMBIC: /* Clear DTR/RTS */ if (*(int*)data & TIOCM_DTR) cx_chan_dtr (c, 0); if (*(int*)data & TIOCM_RTS) cx_chan_rts (c, 0); break; case TIOCMGET: /* Get modem status */ msv = inb (MSVR(c->chip->port)); *(int*)data = TIOCM_LE; /* always enabled while open */ if (msv & MSV_DSR) *(int*)data |= TIOCM_DSR; if (msv & MSV_CTS) *(int*)data |= TIOCM_CTS; if (msv & MSV_CD) *(int*)data |= TIOCM_CD; if (c->dtr) *(int*)data |= TIOCM_DTR; if (c->rts) *(int*)data |= TIOCM_RTS; break; } splx (s); return (0); } /* * Fill transmitter buffer with data. */ void cxout (cx_chan_t *c, char b) { unsigned char *buf, *p, sym; unsigned short port = c->chip->port, len = 0, cnt_port, sts_port; struct tty *tp = c->ttyp; int i; if (! tp) return; /* Choose the buffer. */ if (b == 'A') { buf = c->atbuf; cnt_port = ATBCNT(port); sts_port = ATBSTS(port); } else { buf = c->btbuf; cnt_port = BTBCNT(port); sts_port = BTBSTS(port); } /* Is it busy? */ if (inb (sts_port) & BSTS_OWN24) { tp->t_state |= TS_BUSY; return; } switch (c->brk) { case BRK_SEND: *buf++ = 0; /* extended transmit command */ *buf++ = 0x81; /* send break */ *buf++ = 0; /* extended transmit command */ *buf++ = 0x82; /* insert delay */ *buf++ = 250; /* 1/4 of second */ *buf++ = 0; /* extended transmit command */ *buf++ = 0x82; /* insert delay */ *buf++ = 250; /* + 1/4 of second */ len = 8; c->brk = BRK_IDLE; break; case BRK_STOP: *buf++ = 0; /* extended transmit command */ *buf++ = 0x83; /* stop break */ len = 2; c->brk = BRK_IDLE; break; case BRK_IDLE: len = RB_LEN (tp->t_out); if (tp->t_iflag & IXOFF) for (i=0, p=buf; it_out); /* Send XON/XOFF out of band. */ if (sym == tp->t_cc[VSTOP]) { outb (STCR(port), STC_SNDSPC|STC_SSPC_2); continue; } if (sym == tp->t_cc[VSTART]) { outb (STCR(port), STC_SNDSPC|STC_SSPC_1); continue; } /* Duplicate NULLs in ETC mode. */ if (! sym) *p++ = 0; *p++ = sym; } else for (i=0, p=buf; it_out); /* Duplicate NULLs in ETC mode. */ if (! sym) *p++ = 0; *p++ = sym; } len = p - buf; break; } /* Start transmitter. */ if (len) { outw (cnt_port, len); outb (sts_port, BSTS_INTR | BSTS_OWN24); tp->t_state |= TS_BUSY; print (("cx%d.%d: out %d bytes to %c\n", c->board->num, c->num, len, b)); } } void cxoproc (struct tty *tp) { int unit = UNIT (tp->t_dev); cx_chan_t *c = cxchan[unit]; unsigned short port = c->chip->port; int s = spltty (); /* Set current channel number */ outb (CAR(port), c->num & 3); if (! (tp->t_state & (TS_TIMEOUT | TS_TTSTOP))) { /* Start transmitter. */ if (! (inb (CSR(port)) & CSRA_TXEN)) cx_cmd (port, CCR_ENTX); /* Determine the buffer order. */ if (inb (DMABSTS(port)) & DMABSTS_NTBUF) { cxout (c, 'B'); cxout (c, 'A'); } else { cxout (c, 'A'); cxout (c, 'B'); } } #if defined (__FreeBSD__) && __FreeBSD__ < 2 if (tp->t_state & (TS_SO_OCOMPLETE | TS_SO_OLOWAT) || tp->t_wsel) ttwwakeup (tp); #else /* FreeBSD 2.x and BSDI */ if (RB_LEN (tp->t_out) <= tp->t_lowat) { if (tp->t_state & TS_ASLEEP) { tp->t_state &= ~TS_ASLEEP; wakeup(TSA_OLOWAT(tp)); } selwakeup(&tp->t_wsel); } #endif /* * Enable TXMPTY interrupt, * to catch the case when the second buffer is empty. */ if ((inb (ATBSTS(port)) & BSTS_OWN24) && (inb (BTBSTS(port)) & BSTS_OWN24)) { outb (IER(port), IER_RXD|IER_RET|IER_TXD|IER_TXMPTY|IER_MDM); } else outb (IER(port), IER_RXD|IER_RET|IER_TXD|IER_MDM); splx (s); } int cxparam (struct tty *tp, struct termios *t) { int unit = UNIT (tp->t_dev); cx_chan_t *c = cxchan[unit]; unsigned short port = c->chip->port; int clock, period, s; cx_cor1_async_t cor1; if (t->c_ospeed == 0) { /* Clear DTR and RTS. */ s = spltty (); cx_chan_dtr (c, 0); cx_chan_rts (c, 0); splx (s); print (("cx%d.%d: cxparam (hangup)\n", c->board->num, c->num)); return (0); } print (("cx%d.%d: cxparam\n", c->board->num, c->num)); /* Check requested parameters. */ if (t->c_ospeed < 300 || t->c_ospeed > 256*1024) return(EINVAL); if (t->c_ispeed && (t->c_ispeed < 300 || t->c_ispeed > 256*1024)) return(EINVAL); #ifdef __bsdi__ /* CLOCAL flag set -- wakeup everybody who waits for CD. */ /* FreeBSD does this themselves. */ if (! (tp->t_cflag & CLOCAL) && (t->c_cflag & CLOCAL)) wakeup ((caddr_t) &tp->t_rawq); #endif /* And copy them to tty and channel structures. */ c->rxbaud = tp->t_ispeed = t->c_ispeed; c->txbaud = tp->t_ospeed = t->c_ospeed; tp->t_cflag = t->c_cflag; /* Set character length and parity mode. */ BYTE cor1 = 0; switch (t->c_cflag & CSIZE) { default: case CS8: cor1.charlen = 7; break; case CS7: cor1.charlen = 6; break; case CS6: cor1.charlen = 5; break; case CS5: cor1.charlen = 4; break; } if (t->c_cflag & PARENB) { cor1.parmode = PARM_NORMAL; cor1.ignpar = 0; cor1.parity = (t->c_cflag & PARODD) ? PAR_ODD : PAR_EVEN; } else { cor1.parmode = PARM_NOPAR; cor1.ignpar = 1; } /* Enable/disable hardware CTS. */ c->aopt.cor2.ctsae = (t->c_cflag & CRTSCTS) ? 1 : 0; /* Handle DSR as CTS. */ c->aopt.cor2.dsrae = (t->c_cflag & CRTSCTS) ? 1 : 0; /* Enable extended transmit command mode. * Unfortunately, there is no other method for sending break. */ c->aopt.cor2.etc = 1; /* Enable/disable hardware XON/XOFF. */ c->aopt.cor2.ixon = (t->c_iflag & IXON) ? 1 : 0; c->aopt.cor2.ixany = (t->c_iflag & IXANY) ? 1 : 0; /* Set the number of stop bits. */ if (t->c_cflag & CSTOPB) c->aopt.cor3.stopb = STOPB_2; else c->aopt.cor3.stopb = STOPB_1; /* Disable/enable passing XON/XOFF chars to the host. */ c->aopt.cor3.scde = (t->c_iflag & IXON) ? 1 : 0; c->aopt.cor3.flowct = (t->c_iflag & IXON) ? FLOWCC_NOTPASS : FLOWCC_PASS; c->aopt.schr1 = t->c_cc[VSTART]; /* XON */ c->aopt.schr2 = t->c_cc[VSTOP]; /* XOFF */ /* Set current channel number. */ s = spltty (); outb (CAR(port), c->num & 3); /* Set up receiver clock values. */ cx_clock (c->chip->oscfreq, c->rxbaud, &clock, &period); c->opt.rcor.clk = clock; outb (RCOR(port), BYTE c->opt.rcor); outb (RBPR(port), period); /* Set up transmitter clock values. */ cx_clock (c->chip->oscfreq, c->txbaud, &clock, &period); c->opt.tcor.clk = clock; c->opt.tcor.ext1x = 0; outb (TCOR(port), BYTE c->opt.tcor); outb (TBPR(port), period); outb (COR2(port), BYTE c->aopt.cor2); outb (COR3(port), BYTE c->aopt.cor3); outb (SCHR1(port), c->aopt.schr1); outb (SCHR2(port), c->aopt.schr2); if (BYTE c->aopt.cor1 != BYTE cor1) { BYTE c->aopt.cor1 = BYTE cor1; outb (COR1(port), BYTE c->aopt.cor1); /* Any change to COR1 require reinitialization. */ /* Unfortunately, it may cause transmitter glitches... */ cx_cmd (port, CCR_INITCH); } splx (s); return (0); } int cxselect (dev_t dev, int flag, struct proc *p) { int unit = UNIT (dev); if (unit == UNIT_CTL) return (0); return (ttyselect (cxchan[unit]->ttyp, flag, p)); } /* * Stop output on a line */ void cxstop (struct tty *tp, int flag) { cx_chan_t *c = cxchan[UNIT(tp->t_dev)]; unsigned short port = c->chip->port; int s = spltty (); if (tp->t_state & TS_BUSY) { print (("cx%d.%d: cxstop\n", c->board->num, c->num)); /* Set current channel number */ outb (CAR(port), c->num & 3); /* Stop transmitter */ cx_cmd (port, CCR_DISTX); } splx (s); } /* * Handle receive interrupts, including receive errors and * receive timeout interrupt. */ int cxrinta (cx_chan_t *c) { unsigned short port = c->chip->port; unsigned short len = 0, risr = inw (RISR(port)), reoir = 0; struct tty *tp = c->ttyp; /* Compute optimal receiver buffer length. */ int rbsz = (c->rxbaud + 800 - 1) / 800 * 2; if (rbsz < 4) rbsz = 4; else if (rbsz > DMABUFSZ) rbsz = DMABUFSZ; if (risr & RISA_TIMEOUT) { unsigned long rcbadr = (unsigned short) inw (RCBADRL(port)) | (long) inw (RCBADRU(port)) << 16; unsigned char *buf = 0; unsigned short cnt_port = 0, sts_port = 0; if (rcbadr >= c->brphys && rcbadr < c->brphys+DMABUFSZ) { buf = c->brbuf; len = rcbadr - c->brphys; cnt_port = BRBCNT(port); sts_port = BRBSTS(port); } else if (rcbadr >= c->arphys && rcbadr < c->arphys+DMABUFSZ) { buf = c->arbuf; len = rcbadr - c->arphys; cnt_port = ARBCNT(port); sts_port = ARBSTS(port); } else printf ("cx%d.%d: timeout: invalid buffer address\n", c->board->num, c->num); if (len) { print (("cx%d.%d: async receive timeout (%d bytes), risr=%b, arbsts=%b, brbsts=%b\n", c->board->num, c->num, len, risr, RISA_BITS, inb (ARBSTS(port)), BSTS_BITS, inb (BRBSTS(port)), BSTS_BITS)); if (tp && (tp->t_state & TS_ISOPEN)) { int i; void (*rint)() = (void(*)()) linesw[tp->t_line].l_rint; for (i=0; iboard->num, c->num, risr, RISA_BITS, inb (ARBSTS(port)), BSTS_BITS, inb (BRBSTS(port)), BSTS_BITS)); if (risr & RIS_BUSERR) printf ("cx%d.%d: receive bus error\n", c->board->num, c->num); if (risr & (RIS_OVERRUN | RISA_PARERR | RISA_FRERR)) { print (("cx%d.%d: receive error\n", c->board->num, c->num)); if (tp && (tp->t_state & TS_ISOPEN)) (*linesw[tp->t_line].l_rint) (' ' | (risr & RISA_FRERR) ? TTY_FE : TTY_PE, tp); } /* Handle line break condition. */ if ((risr & RISA_BREAK) && tp && (tp->t_state & TS_ISOPEN)) (*linesw[tp->t_line].l_rint) (TTY_FE, tp); /* Discard exception characters. */ if ((risr & RISA_SCMASK) && (tp->t_iflag & IXON)) reoir |= REOI_DISCEXC; /* Handle received data. */ if ((risr & RIS_EOBUF) && tp && (tp->t_state & TS_ISOPEN)) { void (*rint)() = (void(*)()) linesw[tp->t_line].l_rint; unsigned char *buf; int i; len = (risr & RIS_BB) ? inw(BRBCNT(port)) : inw(ARBCNT(port)); print (("cx%d.%d: async: %d bytes received\n", c->board->num, c->num, len)); buf = (risr & RIS_BB) ? c->brbuf : c->arbuf; for (i=0; ittyp; unsigned short port = c->chip->port; unsigned char tisr = inb (TISR(port)); print (("cx%d.%d: async transmit interrupt, tisr=%b, atbsts=%b, btbsts=%b\n", c->board->num, c->num, tisr, TIS_BITS, inb (ATBSTS(port)), BSTS_BITS, inb (BTBSTS(port)), BSTS_BITS)); if (tisr & TIS_BUSERR) printf ("cx%d.%d: transmit bus error\n", c->board->num, c->num); else if (tisr & TIS_UNDERRUN) printf ("cx%d.%d: transmit underrun error\n", c->board->num, c->num); if (tp) { tp->t_state &= ~(TS_BUSY | TS_FLUSH); if (tp->t_line) (*linesw[tp->t_line].l_start) (tp); else cxoproc (tp); } } /* * Handle modem interrupt. */ void cxmint (cx_chan_t *c) { unsigned short port = c->chip->port; unsigned char misr = inb (MISR(port)); unsigned char msvr = inb (MSVR(port)); struct tty *tp = c->ttyp; if (c->mode != M_ASYNC) { printf ("cx%d.%d: unexpected modem interrupt, misr=%b, msvr=%b\n", c->board->num, c->num, misr, MIS_BITS, msvr, MSV_BITS); return; } print (("cx%d.%d: modem interrupt, misr=%b, msvr=%b\n", c->board->num, c->num, misr, MIS_BITS, msvr, MSV_BITS)); /* Ignore DSR events. */ /* Ignore RTC/CTS events, handled by hardware. */ /* Handle carrier detect/loss. */ if (tp && (misr & MIS_CCD)) (*linesw[tp->t_line].l_modem) (tp, (msvr & MSV_CD) != 0); } /* * Recover after lost transmit interrupts. */ void cxtimeout (caddr_t a) { cx_board_t *b; cx_chan_t *c; struct tty *tp; int s; for (b=cxboard; bchan; cchan+NCHAN; ++c) { tp = c->ttyp; if (c->type==T_NONE || c->mode!=M_ASYNC || !tp) continue; s = spltty (); if (tp->t_state & TS_BUSY) { tp->t_state &= ~TS_BUSY; if (tp->t_line) (*linesw[tp->t_line].l_start) (tp); else cxoproc (tp); } splx (s); } timeout ((timeout_func_t) cxtimeout, 0, hz*5); } #endif /* NCX */