/* $NetBSD: ser.c,v 1.4 1998/03/25 09:46:10 leo Exp $ */ /*- * Copyright (c) 1997 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Leo Weppelman. * * The driver structure is based on the i386 com-driver from Charles M. Hannum. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the NetBSD * Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* #define SER_DEBUG */ #define SERUNIT(x) (minor(x) & 0x7ffff) #define SERDIALOUT(x) (minor(x) & 0x80000) /* XXX */ #define CONSBAUD 9600 #define CONSCFLAG TTYDEF_CFLAG /* end XXX */ /* Macros to clear/set/test flags. */ #define SET(t, f) (t) |= (f) #define CLR(t, f) (t) &= ~(f) #define ISSET(t, f) ((t) & (f)) #define splserial() spl6() /* Buffer size for character buffer */ #define RXBUFSIZE 2048 /* More than enough.. */ #define RXBUFMASK (RXBUFSIZE-1) /* Only iff previous is a power of 2 */ #define RXHIWAT (RXBUFSIZE >> 2) struct ser_softc { struct device sc_dev; struct tty *sc_tty; int sc_overflows; int sc_floods; int sc_errors; u_char sc_hwflags; u_char sc_swflags; int sc_ospeed; /* delay + timer-d data */ u_char sc_imra; u_char sc_imrb; u_char sc_ucr; /* Uart control */ u_char sc_msr; /* Modem status */ u_char sc_tsr; /* Tranceiver status */ u_char sc_rsr; /* Receiver status */ u_char sc_mcr; /* (Pseudo) Modem ctrl. */ u_char sc_msr_delta; u_char sc_msr_mask; u_char sc_mcr_active; u_char sc_mcr_dtr, sc_mcr_rts, sc_msr_cts, sc_msr_dcd; int sc_r_hiwat; volatile u_int sc_rbget; volatile u_int sc_rbput; volatile u_int sc_rbavail; u_char sc_rbuf[RXBUFSIZE]; u_char sc_lbuf[RXBUFSIZE]; volatile u_char sc_rx_blocked; volatile u_char sc_rx_ready; volatile u_char sc_tx_busy; volatile u_char sc_tx_done; volatile u_char sc_tx_stopped; volatile u_char sc_st_check; u_char *sc_tba; int sc_tbc; int sc_heldtbc; volatile u_char sc_heldchange; }; /* * For sc_hwflags: */ #define SER_HW_CONSOLE 0x01 cdev_decl(ser); void ser_break __P((struct ser_softc *, int)); void ser_hwiflow __P((struct ser_softc *, int)); void ser_iflush __P((struct ser_softc *)); void ser_loadchannelregs __P((struct ser_softc *)); void ser_modem __P((struct ser_softc *, int)); void serdiag __P((void *)); int serhwiflow __P((struct tty *, int)); void serinit __P((int)); void serinitcons __P((int)); int baud; int sermintr __P((void *)); int sertrintr __P((void *)); int serparam __P((struct tty *, struct termios *)); void serstart __P((struct tty *)); struct consdev; void sercnprobe __P((struct consdev *)); void sercninit __P((struct consdev *)); int sercngetc __P((dev_t)); void sercnputc __P((dev_t, int)); void sercnpollc __P((dev_t, int)); static void sermsrint __P((struct ser_softc *, struct tty*)); static void serrxint __P((struct ser_softc *, struct tty*)); static void ser_shutdown __P((struct ser_softc *)); static int serspeed __P((long)); static void sersoft __P((void *)); static void sertxint __P((struct ser_softc *, struct tty*)); static volatile int ser_softintr_scheduled = 0; static int sermajor; /* * Autoconfig stuff */ static void serattach __P((struct device *, struct device *, void *)); static int sermatch __P((struct device *, struct cfdata *, void *)); struct cfattach ser_ca = { sizeof(struct ser_softc), sermatch, serattach }; extern struct cfdriver ser_cd; /*ARGSUSED*/ static int sermatch(pdp, cfp, auxp) struct device *pdp; struct cfdata *cfp; void *auxp; { if (!strcmp((char *)auxp, "ser") && cfp->cf_unit == 0) return (1); return (0); } /*ARGSUSED*/ static void serattach(pdp, dp, auxp) struct device *pdp, *dp; void *auxp; { struct ser_softc *sc = (void *)dp; if (intr_establish(1, USER_VEC, 0, (hw_ifun_t)sermintr, sc) == NULL) printf("serattach: Can't establish interrupt (1)\n"); if (intr_establish(2, USER_VEC, 0, (hw_ifun_t)sermintr, sc) == NULL) printf("serattach: Can't establish interrupt (2)\n"); if (intr_establish(14, USER_VEC, 0, (hw_ifun_t)sermintr, sc) == NULL) printf("serattach: Can't establish interrupt (14)\n"); if (intr_establish(9, USER_VEC, 0, (hw_ifun_t)sertrintr, sc) == NULL) printf("serattach: Can't establish interrupt (9)\n"); if (intr_establish(10, USER_VEC, 0, (hw_ifun_t)sertrintr, sc) == NULL) printf("serattach: Can't establish interrupt (10)\n"); if (intr_establish(11, USER_VEC, 0, (hw_ifun_t)sertrintr, sc) == NULL) printf("serattach: Can't establish interrupt (11)\n"); if (intr_establish(12, USER_VEC, 0, (hw_ifun_t)sertrintr, sc) == NULL) printf("serattach: Can't establish interrupt (12)\n"); ym2149_rts(1); ym2149_dtr(1); /* * Enable but mask interrupts... * XXX: Look at edge-sensitivity for DCD/CTS interrupts. */ MFP->mf_ierb |= IB_SCTS|IB_SDCD; MFP->mf_iera |= IA_RRDY|IA_RERR|IA_TRDY|IA_TERR; MFP->mf_imrb &= ~(IB_SCTS|IB_SDCD); MFP->mf_imra &= ~(IA_RRDY|IA_RERR|IA_TRDY|IA_TERR); #ifdef SERCONSOLE /* * Activate serial console when DCD present... */ if (!(MFP->mf_gpip & MCR_DCD)) SET(sc->sc_hwflags, SER_HW_CONSOLE); #endif /* SERCONSOLE */ printf("\n"); if (ISSET(sc->sc_hwflags, SER_HW_CONSOLE)) { serinit(CONSBAUD); printf("%s: console\n", sc->sc_dev.dv_xname); } } #ifdef SER_DEBUG void serstatus __P((struct ser_softc *, char *)); void serstatus(sc, str) struct ser_softc *sc; char *str; { struct tty *tp = sc->sc_tty; printf("%s: %s %sclocal %sdcd %sts_carr_on %sdtr %stx_stopped\n", sc->sc_dev.dv_xname, str, ISSET(tp->t_cflag, CLOCAL) ? "+" : "-", ISSET(sc->sc_msr, MCR_DCD) ? "+" : "-", ISSET(tp->t_state, TS_CARR_ON) ? "+" : "-", ISSET(sc->sc_mcr, MCR_DTR) ? "+" : "-", sc->sc_tx_stopped ? "+" : "-"); printf("%s: %s %scrtscts %scts %sts_ttstop %srts %srx_blocked\n", sc->sc_dev.dv_xname, str, ISSET(tp->t_cflag, CRTSCTS) ? "+" : "-", ISSET(sc->sc_msr, MCR_CTS) ? "+" : "-", ISSET(tp->t_state, TS_TTSTOP) ? "+" : "-", ISSET(sc->sc_mcr, MCR_RTS) ? "+" : "-", sc->sc_rx_blocked ? "+" : "-"); } #endif /* SER_DEBUG */ int seropen(dev, flag, mode, p) dev_t dev; int flag, mode; struct proc *p; { int unit = SERUNIT(dev); struct ser_softc *sc; struct tty *tp; int s, s2; int error = 0; if (unit >= ser_cd.cd_ndevs) return (ENXIO); sc = ser_cd.cd_devs[unit]; if (!sc) return (ENXIO); if (!sc->sc_tty) { tp = sc->sc_tty = ttymalloc(); tty_attach(tp); } else tp = sc->sc_tty; if (ISSET(tp->t_state, TS_ISOPEN) && ISSET(tp->t_state, TS_XCLUDE) && p->p_ucred->cr_uid != 0) return (EBUSY); s = spltty(); /* * Do the following if this is a first open. */ if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { struct termios t; /* Turn on interrupts. */ sc->sc_imra = IA_RRDY|IA_RERR|IA_TRDY|IA_TERR; sc->sc_imrb = IB_SCTS|IB_SDCD; single_inst_bset_b(MFP->mf_imra, sc->sc_imra); single_inst_bset_b(MFP->mf_imrb, sc->sc_imrb); /* Fetch the current modem control status, needed later. */ sc->sc_msr = ~MFP->mf_gpip & (IO_SDCD|IO_SCTS|IO_SRI); /* Add some entry points needed by the tty layer. */ tp->t_oproc = serstart; tp->t_param = serparam; tp->t_hwiflow = serhwiflow; tp->t_dev = dev; /* * Initialize the termios status to the defaults. Add in the * sticky bits from TIOCSFLAGS. */ t.c_ispeed = 0; if (ISSET(sc->sc_hwflags, SER_HW_CONSOLE)) { t.c_ospeed = CONSBAUD; t.c_cflag = CONSCFLAG; } else { t.c_ospeed = TTYDEF_SPEED; t.c_cflag = TTYDEF_CFLAG; } if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) SET(t.c_cflag, CLOCAL); if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) SET(t.c_cflag, CRTSCTS); if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) SET(t.c_cflag, MDMBUF); tp->t_iflag = TTYDEF_IFLAG; tp->t_oflag = TTYDEF_OFLAG; tp->t_lflag = TTYDEF_LFLAG; ttychars(tp); (void) serparam(tp, &t); ttsetwater(tp); s2 = splserial(); /* * Turn on DTR. We must always do this, even if carrier is not * present, because otherwise we'd have to use TIOCSDTR * immediately after setting CLOCAL. We will drop DTR only on * the next high-low transition of DCD, or by explicit request. */ ser_modem(sc, 1); /* Clear the input ring, and unblock. */ sc->sc_rbput = sc->sc_rbget = 0; sc->sc_rbavail = RXBUFSIZE; ser_iflush(sc); sc->sc_rx_blocked = 0; ser_hwiflow(sc, 0); #ifdef SER_DEBUG serstatus(sc, "seropen "); #endif splx(s2); } splx(s); error = ttyopen(tp, SERDIALOUT(dev), ISSET(flag, O_NONBLOCK)); if (error) goto bad; error = (*linesw[tp->t_line].l_open)(dev, tp); if (error) goto bad; return (0); bad: if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { /* * We failed to open the device, and nobody else had it opened. * Clean up the state as appropriate. */ ser_shutdown(sc); } return (error); } int serclose(dev, flag, mode, p) dev_t dev; int flag, mode; struct proc *p; { int unit = SERUNIT(dev); struct ser_softc *sc = ser_cd.cd_devs[unit]; struct tty *tp = sc->sc_tty; /* XXX This is for cons.c. */ if (!ISSET(tp->t_state, TS_ISOPEN)) return (0); (*linesw[tp->t_line].l_close)(tp, flag); ttyclose(tp); if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { /* * Although we got a last close, the device may still be in * use; e.g. if this was the dialout node, and there are still * processes waiting for carrier on the non-dialout node. */ ser_shutdown(sc); } return (0); } int serread(dev, uio, flag) dev_t dev; struct uio *uio; int flag; { struct ser_softc *sc = ser_cd.cd_devs[SERUNIT(dev)]; struct tty *tp = sc->sc_tty; return ((*linesw[tp->t_line].l_read)(tp, uio, flag)); } int serwrite(dev, uio, flag) dev_t dev; struct uio *uio; int flag; { struct ser_softc *sc = ser_cd.cd_devs[SERUNIT(dev)]; struct tty *tp = sc->sc_tty; return ((*linesw[tp->t_line].l_write)(tp, uio, flag)); } struct tty * sertty(dev) dev_t dev; { struct ser_softc *sc = ser_cd.cd_devs[SERUNIT(dev)]; struct tty *tp = sc->sc_tty; return (tp); } int serioctl(dev, cmd, data, flag, p) dev_t dev; u_long cmd; caddr_t data; int flag; struct proc *p; { int unit = SERUNIT(dev); struct ser_softc *sc = ser_cd.cd_devs[unit]; struct tty *tp = sc->sc_tty; int error; error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p); if (error >= 0) return (error); error = ttioctl(tp, cmd, data, flag, p); if (error >= 0) return (error); switch (cmd) { case TIOCSBRK: ser_break(sc, 1); break; case TIOCCBRK: ser_break(sc, 0); break; case TIOCSDTR: ser_modem(sc, 1); break; case TIOCCDTR: ser_modem(sc, 0); break; case TIOCGFLAGS: *(int *)data = sc->sc_swflags; break; case TIOCSFLAGS: error = suser(p->p_ucred, &p->p_acflag); if (error) return (error); sc->sc_swflags = *(int *)data; break; case TIOCMSET: case TIOCMBIS: case TIOCMBIC: case TIOCMGET: default: return (ENOTTY); } #ifdef SER_DEBUG serstatus(sc, "serioctl "); #endif return (0); } void ser_break(sc, onoff) struct ser_softc *sc; int onoff; { int s; s = splserial(); if (onoff) SET(sc->sc_tsr, TSR_SBREAK); else CLR(sc->sc_tsr, TSR_SBREAK); if (!sc->sc_heldchange) { if (sc->sc_tx_busy) { sc->sc_heldtbc = sc->sc_tbc; sc->sc_tbc = 0; sc->sc_heldchange = 1; } else ser_loadchannelregs(sc); } splx(s); } void ser_modem(sc, onoff) struct ser_softc *sc; int onoff; { int s; s = splserial(); if (onoff) SET(sc->sc_mcr, sc->sc_mcr_dtr); else CLR(sc->sc_mcr, sc->sc_mcr_dtr); if (!sc->sc_heldchange) { if (sc->sc_tx_busy) { sc->sc_heldtbc = sc->sc_tbc; sc->sc_tbc = 0; sc->sc_heldchange = 1; } else ser_loadchannelregs(sc); } splx(s); } int serparam(tp, t) struct tty *tp; struct termios *t; { struct ser_softc *sc = ser_cd.cd_devs[SERUNIT(tp->t_dev)]; int ospeed = serspeed(t->c_ospeed); u_char ucr; int s; /* check requested parameters */ if (ospeed < 0) return (EINVAL); if (t->c_ispeed && t->c_ispeed != t->c_ospeed) return (EINVAL); sc->sc_rsr = RSR_ENAB; sc->sc_tsr = TSR_ENAB; ucr = UCR_CLKDIV; switch (ISSET(t->c_cflag, CSIZE)) { case CS5: SET(ucr, UCR_5BITS); break; case CS6: SET(ucr, UCR_6BITS); break; case CS7: SET(ucr, UCR_7BITS); break; case CS8: SET(ucr, UCR_8BITS); break; } if (ISSET(t->c_cflag, PARENB)) { SET(ucr, UCR_PENAB); if (!ISSET(t->c_cflag, PARODD)) SET(ucr, UCR_PEVEN); } if (ISSET(t->c_cflag, CSTOPB)) SET(ucr, UCR_STOPB2); else SET(ucr, UCR_STOPB1); s = splserial(); sc->sc_ucr = ucr; /* * For the console, always force CLOCAL and !HUPCL, so that the port * is always active. */ if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR) || ISSET(sc->sc_hwflags, SER_HW_CONSOLE)) { SET(t->c_cflag, CLOCAL); CLR(t->c_cflag, HUPCL); } /* * If we're not in a mode that assumes a connection is present, then * ignore carrier changes. */ if (ISSET(t->c_cflag, CLOCAL | MDMBUF)) sc->sc_msr_dcd = 0; else sc->sc_msr_dcd = MCR_DCD; /* * Set the flow control pins depending on the current flow control * mode. */ if (ISSET(t->c_cflag, CRTSCTS)) { sc->sc_mcr_dtr = MCR_DTR; sc->sc_mcr_rts = MCR_RTS; sc->sc_msr_cts = MCR_CTS; sc->sc_r_hiwat = RXHIWAT; } else if (ISSET(t->c_cflag, MDMBUF)) { /* * For DTR/DCD flow control, make sure we don't toggle DTR for * carrier detection. */ sc->sc_mcr_dtr = 0; sc->sc_mcr_rts = MCR_DTR; sc->sc_msr_cts = MCR_DCD; sc->sc_r_hiwat = RXHIWAT; } else { /* * If no flow control, then always set RTS. This will make * the other side happy if it mistakenly thinks we're doing * RTS/CTS flow control. */ sc->sc_mcr_dtr = MCR_DTR | MCR_RTS; sc->sc_mcr_rts = 0; sc->sc_msr_cts = 0; sc->sc_r_hiwat = 0; if (ISSET(sc->sc_mcr, MCR_DTR)) SET(sc->sc_mcr, MCR_RTS); else CLR(sc->sc_mcr, MCR_RTS); } sc->sc_msr_mask = sc->sc_msr_cts | sc->sc_msr_dcd; #if 0 if (ospeed == 0) CLR(sc->sc_mcr, sc->sc_mcr_dtr); else SET(sc->sc_mcr, sc->sc_mcr_dtr); #endif sc->sc_ospeed = ospeed; /* and copy to tty */ tp->t_ispeed = 0; tp->t_ospeed = t->c_ospeed; tp->t_cflag = t->c_cflag; if (!sc->sc_heldchange) { if (sc->sc_tx_busy) { sc->sc_heldtbc = sc->sc_tbc; sc->sc_tbc = 0; sc->sc_heldchange = 1; } else ser_loadchannelregs(sc); } splx(s); /* * Update the tty layer's idea of the carrier bit, in case we changed * CLOCAL or MDMBUF. We don't hang up here; we only do that if we * lose carrier while carrier detection is on. */ (void) (*linesw[tp->t_line].l_modem)(tp, ISSET(sc->sc_msr, MCR_DCD)); #ifdef SER_DEBUG serstatus(sc, "serparam "); #endif /* XXXXX FIX ME */ /* Block or unblock as needed. */ if (!ISSET(t->c_cflag, CHWFLOW)) { if (sc->sc_rx_blocked) { sc->sc_rx_blocked = 0; ser_hwiflow(sc, 0); } if (sc->sc_tx_stopped) { sc->sc_tx_stopped = 0; serstart(tp); } } else { #if 0 sermsrint(sc, tp); #endif } return (0); } void ser_iflush(sc) struct ser_softc *sc; { u_char tmp; /* flush any pending I/O */ while (ISSET(MFP->mf_rsr, RSR_CIP|RSR_BFULL)) tmp = MFP->mf_udr; } void ser_loadchannelregs(sc) struct ser_softc *sc; { /* XXXXX necessary? */ ser_iflush(sc); /* * No interrupts please... */ if((MFP->mf_imra & (IA_RRDY|IA_RERR|IA_TRDY|IA_TERR)) != sc->sc_imra) { printf("loadchannelregs: mf_imra: %x sc_imra: %x\n", (u_int)MFP->mf_imra, (u_int)sc->sc_imra); } if((MFP->mf_imrb & (IB_SCTS|IB_SDCD)) != sc->sc_imrb) { printf("loadchannelregs: mf_imrb: %x sc_imrb: %x\n", (u_int)MFP->mf_imrb, (u_int)sc->sc_imrb); } single_inst_bclr_b(MFP->mf_imra, IA_RRDY|IA_RERR|IA_TRDY|IA_TERR); single_inst_bclr_b(MFP->mf_imrb, IB_SCTS|IB_SDCD); MFP->mf_ucr = sc->sc_ucr; MFP->mf_rsr = sc->sc_rsr; MFP->mf_tsr = sc->sc_tsr; single_inst_bclr_b(MFP->mf_tcdcr, 0x07); MFP->mf_tddr = sc->sc_ospeed; single_inst_bset_b(MFP->mf_tcdcr, (sc->sc_ospeed >> 8) & 0x0f); sc->sc_mcr_active = sc->sc_mcr; if (machineid & ATARI_HADES) { /* PCB fault, wires exchanged..... */ ym2149_rts(!(sc->sc_mcr_active & MCR_DTR)); ym2149_dtr(!(sc->sc_mcr_active & MCR_RTS)); } else { ym2149_rts(!(sc->sc_mcr_active & MCR_RTS)); ym2149_dtr(!(sc->sc_mcr_active & MCR_DTR)); } single_inst_bset_b(MFP->mf_imra, sc->sc_imra); single_inst_bset_b(MFP->mf_imrb, sc->sc_imrb); } int serhwiflow(tp, block) struct tty *tp; int block; { struct ser_softc *sc = ser_cd.cd_devs[SERUNIT(tp->t_dev)]; int s; if (sc->sc_mcr_rts == 0) return (0); s = splserial(); if (block) { /* * The tty layer is asking us to block input. * If we already did it, just return TRUE. */ if (sc->sc_rx_blocked) goto out; sc->sc_rx_blocked = 1; } else { /* * The tty layer is asking us to resume input. * The input ring is always empty by now. */ sc->sc_rx_blocked = 0; } ser_hwiflow(sc, block); out: splx(s); return (1); } /* * (un)block input via hw flowcontrol */ void ser_hwiflow(sc, block) struct ser_softc *sc; int block; { if (sc->sc_mcr_rts == 0) return; if (block) { CLR(sc->sc_mcr, sc->sc_mcr_rts); CLR(sc->sc_mcr_active, sc->sc_mcr_rts); } else { SET(sc->sc_mcr, sc->sc_mcr_rts); SET(sc->sc_mcr_active, sc->sc_mcr_rts); } if (machineid & ATARI_HADES) { /* PCB fault, wires exchanged..... */ ym2149_dtr(sc->sc_mcr_active & MCR_RTS); } else { ym2149_rts(sc->sc_mcr_active & MCR_RTS); } } void serstart(tp) struct tty *tp; { struct ser_softc *sc = ser_cd.cd_devs[SERUNIT(tp->t_dev)]; int s; s = spltty(); if (ISSET(tp->t_state, TS_BUSY)) goto out; if (ISSET(tp->t_state, TS_TIMEOUT | TS_TTSTOP)) goto stopped; if (sc->sc_tx_stopped) goto stopped; if (tp->t_outq.c_cc <= tp->t_lowat) { if (ISSET(tp->t_state, TS_ASLEEP)) { CLR(tp->t_state, TS_ASLEEP); wakeup(&tp->t_outq); } selwakeup(&tp->t_wsel); if (tp->t_outq.c_cc == 0) goto stopped; } /* Grab the first contiguous region of buffer space. */ { u_char *tba; int tbc; tba = tp->t_outq.c_cf; tbc = ndqb(&tp->t_outq, 0); (void)splserial(); sc->sc_tba = tba; sc->sc_tbc = tbc; } SET(tp->t_state, TS_BUSY); sc->sc_tx_busy = 1; /* Enable transmit completion interrupts if necessary. */ if (!ISSET(sc->sc_imra, IA_TRDY)) { SET(sc->sc_imra, IA_TRDY|IA_TERR); single_inst_bset_b(MFP->mf_imra, IA_TRDY|IA_TERR); } /* Output the first char */ MFP->mf_udr = *sc->sc_tba; sc->sc_tbc --; sc->sc_tba ++; splx(s); return; stopped: /* Disable transmit completion interrupts if necessary. */ if (ISSET(sc->sc_imra, IA_TRDY)) { CLR(sc->sc_imra, IA_TRDY|IA_TERR); single_inst_bclr_b(MFP->mf_imra, IA_TRDY|IA_TERR); } out: splx(s); return; } /* * Stop output on a line. */ void serstop(tp, flag) struct tty *tp; int flag; { struct ser_softc *sc = ser_cd.cd_devs[SERUNIT(tp->t_dev)]; int s; s = splserial(); if (ISSET(tp->t_state, TS_BUSY)) { /* Stop transmitting at the next chunk. */ sc->sc_tbc = 0; sc->sc_heldtbc = 0; if (!ISSET(tp->t_state, TS_TTSTOP)) SET(tp->t_state, TS_FLUSH); } splx(s); } void serdiag(arg) void *arg; { struct ser_softc *sc = arg; int overflows, floods; int s; s = splserial(); overflows = sc->sc_overflows; sc->sc_overflows = 0; floods = sc->sc_floods; sc->sc_floods = 0; sc->sc_errors = 0; splx(s); log(LOG_WARNING, "%s: %d silo overflow%s, %d ibuf flood%s\n", sc->sc_dev.dv_xname, overflows, overflows == 1 ? "" : "s", floods, floods == 1 ? "" : "s"); } static void ser_shutdown(sc) struct ser_softc *sc; { int s; struct tty *tp = sc->sc_tty; s = splserial(); /* If we were asserting flow control, then deassert it. */ sc->sc_rx_blocked = 1; ser_hwiflow(sc, 1); /* Clear any break condition set with TIOCSBRK. */ ser_break(sc, 0); /* * Hang up if necessary. Wait a bit, so the other side has time to * notice even if we immediately open the port again. */ if (ISSET(tp->t_cflag, HUPCL)) { ser_modem(sc, 0); (void) tsleep(sc, TTIPRI, ttclos, hz); } /* Turn off interrupts. */ CLR(sc->sc_imra, IA_RRDY|IA_RERR|IA_TRDY|IA_TERR); CLR(sc->sc_imrb, IB_SCTS|IB_SDCD); single_inst_bclr_b(MFP->mf_imrb, IB_SCTS|IB_SDCD); single_inst_bclr_b(MFP->mf_imra, IA_RRDY|IA_RERR|IA_TRDY|IA_TERR); splx(s); } static void serrxint(sc, tp) struct ser_softc *sc; struct tty *tp; { u_int get, cc, scc; int code; u_char rsr; int s; static int lsrmap[8] = { 0, TTY_PE, TTY_FE, TTY_PE|TTY_FE, TTY_FE, TTY_PE|TTY_FE, TTY_FE, TTY_PE|TTY_FE }; get = sc->sc_rbget; scc = cc = RXBUFSIZE - sc->sc_rbavail; if (cc == RXBUFSIZE) { sc->sc_floods++; if (sc->sc_errors++ == 0) timeout(serdiag, sc, 60 * hz); } while (cc--) { rsr = sc->sc_lbuf[get]; if (ISSET(rsr, RSR_BREAK)) { #ifdef DDB if (ISSET(sc->sc_hwflags, SER_HW_CONSOLE)) Debugger(); #endif } else if (ISSET(rsr, RSR_OERR)) { sc->sc_overflows++; if (sc->sc_errors++ == 0) timeout(serdiag, sc, 60 * hz); } code = sc->sc_rbuf[get] | lsrmap[(rsr & (RSR_BREAK|RSR_FERR|RSR_PERR)) >> 3]; (*linesw[tp->t_line].l_rint)(code, tp); get = (get + 1) & RXBUFMASK; } sc->sc_rbget = get; s = splserial(); sc->sc_rbavail += scc; /* * Buffers should be ok again, release possible block, but only if the * tty layer isn't blocking too. */ if (sc->sc_rx_blocked && !ISSET(tp->t_state, TS_TBLOCK)) { sc->sc_rx_blocked = 0; ser_hwiflow(sc, 0); } splx(s); } static void sertxint(sc, tp) struct ser_softc *sc; struct tty *tp; { CLR(tp->t_state, TS_BUSY); if (ISSET(tp->t_state, TS_FLUSH)) CLR(tp->t_state, TS_FLUSH); else ndflush(&tp->t_outq, (int)(sc->sc_tba - tp->t_outq.c_cf)); (*linesw[tp->t_line].l_start)(tp); } static void sermsrint(sc, tp) struct ser_softc *sc; struct tty *tp; { u_char msr, delta; int s; s = splserial(); msr = sc->sc_msr; delta = sc->sc_msr_delta; sc->sc_msr_delta = 0; splx(s); if (ISSET(delta, sc->sc_msr_dcd)) { /* * Inform the tty layer that carrier detect changed. */ (void) (*linesw[tp->t_line].l_modem)(tp, ISSET(msr, MCR_DCD)); } if (ISSET(delta, sc->sc_msr_cts)) { /* Block or unblock output according to flow control. */ if (ISSET(msr, sc->sc_msr_cts)) { sc->sc_tx_stopped = 0; (*linesw[tp->t_line].l_start)(tp); } else { sc->sc_tx_stopped = 1; serstop(tp, 0); } } #ifdef SER_DEBUG serstatus(sc, "sermsrint"); #endif } void sersoft(arg) void *arg; { struct ser_softc *sc = arg; struct tty *tp; ser_softintr_scheduled = 0; tp = sc->sc_tty; if (tp == NULL) return; if (!ISSET(tp->t_state, TS_ISOPEN) && (tp->t_wopen == 0)) return; if (sc->sc_rx_ready) { sc->sc_rx_ready = 0; serrxint(sc, tp); } if (sc->sc_st_check) { sc->sc_st_check = 0; sermsrint(sc, tp); } if (sc->sc_tx_done) { sc->sc_tx_done = 0; sertxint(sc, tp); } } int sermintr(arg) void *arg; { struct ser_softc *sc = arg; u_char msr, delta; msr = ~MFP->mf_gpip; delta = msr ^ sc->sc_msr; sc->sc_msr = sc->sc_msr & ~(MCR_CTS|MCR_DCD|MCR_RI); sc->sc_msr |= msr & (MCR_CTS|MCR_DCD|MCR_RI); if (ISSET(delta, sc->sc_msr_mask)) { sc->sc_msr_delta |= delta; /* * Stop output immediately if we lose the output * flow control signal or carrier detect. */ if (ISSET(~msr, sc->sc_msr_mask)) { sc->sc_tbc = 0; sc->sc_heldtbc = 0; #ifdef SER_DEBUG serstatus(sc, "sermintr "); #endif } sc->sc_st_check = 1; } if (!ser_softintr_scheduled) add_sicallback((si_farg)sersoft, sc, 0); return 1; } int sertrintr(arg) void *arg; { struct ser_softc *sc = arg; u_int put, cc; u_char rsr, tsr; put = sc->sc_rbput; cc = sc->sc_rbavail; rsr = MFP->mf_rsr; if (ISSET(rsr, RSR_BFULL|RSR_BREAK)) { for (; ISSET(rsr, RSR_BFULL|RSR_BREAK) && cc > 0; cc--) { sc->sc_rbuf[put] = MFP->mf_udr; sc->sc_lbuf[put] = rsr; put = (put + 1) & RXBUFMASK; if ((rsr & RSR_BREAK) && (MFP->mf_rsr & RSR_BREAK)) rsr = 0; else rsr = MFP->mf_rsr; } /* * Current string of incoming characters ended because * no more data was available. Schedule a receive event * if any data was received. Drop any characters that * we couldn't handle. */ sc->sc_rbput = put; sc->sc_rbavail = cc; sc->sc_rx_ready = 1; /* * See if we are in danger of overflowing a buffer. If * so, use hardware flow control to ease the pressure. */ if (sc->sc_rx_blocked == 0 && cc < sc->sc_r_hiwat) { sc->sc_rx_blocked = 1; ser_hwiflow(sc, 1); } /* * If we're out of space, throw away any further input. */ if (!cc) { while (ISSET(rsr, RSR_BFULL|RSR_BREAK)) { rsr = MFP->mf_udr; rsr = MFP->mf_rsr; } } } /* * Done handling any receive interrupts. See if data can be * transmitted as well. Schedule tx done event if no data left * and tty was marked busy. */ tsr = MFP->mf_tsr; if (ISSET(tsr, TSR_BE)) { /* * If we've delayed a parameter change, do it now, and restart * output. */ if (sc->sc_heldchange) { ser_loadchannelregs(sc); sc->sc_heldchange = 0; sc->sc_tbc = sc->sc_heldtbc; sc->sc_heldtbc = 0; } /* Output the next character, if any. */ if (sc->sc_tbc > 0) { MFP->mf_udr = *sc->sc_tba; sc->sc_tbc --; sc->sc_tba ++; } else if (sc->sc_tx_busy) { sc->sc_tx_busy = 0; sc->sc_tx_done = 1; } } if (!ser_softintr_scheduled) add_sicallback((si_farg)sersoft, sc, 0); return 1; } static int serspeed(speed) long speed; { #define divrnd(n, q) (((n)*2/(q)+1)/2) /* divide and round off */ int div, x, err; if (speed <= 0) return (-1); for (div = 4; div <= 64; div *= 4) { x = divrnd((SER_FREQ / div), speed); /* * The value must fit in the timer-d dataregister. If * not, try another delay-mode. */ if ((x/2) > 255) continue; /* * Baudrate to high for the interface or cannot be made * within tolerance. */ if (x <= 0) return (-1); err = divrnd((SER_FREQ / div) * 1000, speed * x) - 1000; if (err < 0) err = -err; if (err > SER_TOLERANCE) continue; /* * Translate 'div' to delay-code */ if (div == 4) div = 1; else if (div == 16) div = 3; else if (div == 64) div = 5; return ((x/2) | (div << 8)); } return (-1); #undef divrnd(n, q) } /* * Following are all routines needed for SER to act as console */ #include void sercnprobe(cp) struct consdev *cp; { /* * Activate serial console when DCD present... */ if (MFP->mf_gpip & MCR_DCD) { cp->cn_pri = CN_DEAD; return; } for (sermajor = 0; sermajor < nchrdev; sermajor++) if (cdevsw[sermajor].d_open == seropen) break; /* initialize required fields */ cp->cn_dev = makedev(sermajor, 0); /* XXX: LWP What unit? */ #ifdef SERCONSOLE cp->cn_pri = CN_REMOTE; /* Force a serial port console */ #else cp->cn_pri = CN_NORMAL; #endif } void sercninit(cp) struct consdev *cp; { serinitcons(CONSBAUD); } /* * Initialize UART to known state. */ void serinit(baud) int baud; { int ospeed = serspeed(baud); MFP->mf_ucr = UCR_CLKDIV|UCR_8BITS|UCR_STOPB1; MFP->mf_rsr = RSR_ENAB; MFP->mf_tsr = TSR_ENAB; single_inst_bclr_b(MFP->mf_tcdcr, 0x07); MFP->mf_tddr = ospeed; single_inst_bset_b(MFP->mf_tcdcr, (ospeed >> 8) & 0x0f); } /* * Set UART for console use. Do normal init, then enable interrupts. */ void serinitcons(baud) int baud; { serinit(baud); /* Set rts/dtr */ ym2149_rts(0); ym2149_dtr(0); single_inst_bset_b(MFP->mf_imra, (IA_RRDY|IA_RERR|IA_TRDY|IA_TERR)); } int sercngetc(dev) dev_t dev; { u_char stat, c; int s; s = splserial(); while (!ISSET(stat = MFP->mf_rsr, RSR_BFULL)) { if (!ISSET(stat, RSR_ENAB)) /* XXX */ MFP->mf_rsr |= RSR_ENAB; if (stat & (RSR_FERR|RSR_PERR|RSR_OERR)) c = MFP->mf_udr; } c = MFP->mf_udr; splx(s); return c; } u_int s_imra; u_int s_stat1, s_stat2, s_stat3; void sercnputc(dev, c) dev_t dev; int c; { int timo; u_char stat, imra; /* Mask serial interrupts */ imra = MFP->mf_imra & (IA_RRDY|IA_RERR|IA_TRDY|IA_TERR); single_inst_bclr_b(MFP->mf_imra, imra); s_imra = imra; /* wait for any pending transmission to finish */ timo = 50000; s_stat1 = MFP->mf_tsr; while (!ISSET(stat = MFP->mf_tsr, TSR_BE) && --timo) ; MFP->mf_udr = c; /* wait for this transmission to complete */ timo = 1500000; s_stat2 = MFP->mf_tsr; while (!ISSET(stat = MFP->mf_tsr, TSR_BE) && --timo) ; s_stat3 = MFP->mf_tsr; /* Clear pending serial interrupts and re-enable */ single_inst_bclr_b(MFP->mf_ipra, imra); single_inst_bset_b(MFP->mf_imra, imra); } void sercnpollc(dev, on) dev_t dev; int on; { }