/* $NetBSD: ser.c,v 1.56 2014/11/15 19:20:01 christos 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. * * 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. * * 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. */ /*- * Copyright (c) 1993, 1994, 1995, 1996, 1997 * Charles M. Hannum. All rights reserved. * * Interrupt processing and hardware flow control partly based on code from * Onno van der Linden and Gordon Ross. * * 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 Charles M. Hannum. * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. */ /* * Copyright (c) 1991 The Regents of the University of California. * All rights reserved. * * 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. Neither the name of the University 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 REGENTS 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 REGENTS 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. * * @(#)com.c 7.5 (Berkeley) 5/16/91 */ #include __KERNEL_RCSID(0, "$NetBSD: ser.c,v 1.56 2014/11/15 19:20:01 christos Exp $"); #include "opt_ddb.h" #include "opt_mbtype.h" #include "opt_serconsole.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "ioconf.h" #if !defined(_MILANHW_) #include #else /* MILAN has no ym2149 */ #define ym2149_dtr(set) { \ if (set) \ single_inst_bset_b(MFP->mf_gpip, 0x08); \ else \ single_inst_bclr_b(MFP->mf_gpip, 0x08); \ } #define ym2149_rts(set) { \ if (set) \ single_inst_bset_b(MFP->mf_gpip, 0x01); \ else \ single_inst_bclr_b(MFP->mf_gpip, 0x01); \ } #endif /* _MILANHW_ */ /* #define SER_DEBUG */ #define SERUNIT(x) TTUNIT(x) #define SERDIALOUT(x) TTDIALOUT(x) /* XXX */ #define CONSBAUD 9600 #define CONSCFLAG TTYDEF_CFLAG /* end XXX */ /* 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 { device_t sc_dev; struct tty *sc_tty; struct callout sc_diag_ch; int sc_overflows; int sc_floods; int sc_errors; uint8_t sc_hwflags; uint8_t sc_swflags; int sc_ospeed; /* delay + timer-d data */ uint8_t sc_imra; uint8_t sc_imrb; uint8_t sc_ucr; /* Uart control */ uint8_t sc_msr; /* Modem status */ uint8_t sc_tsr; /* Tranceiver status */ uint8_t sc_rsr; /* Receiver status */ uint8_t sc_mcr; /* (Pseudo) Modem ctrl. */ uint8_t sc_msr_delta; uint8_t sc_msr_mask; uint8_t sc_mcr_active; uint8_t 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; uint8_t sc_rbuf[RXBUFSIZE]; uint8_t sc_lbuf[RXBUFSIZE]; volatile uint8_t sc_rx_blocked; volatile uint8_t sc_rx_ready; volatile uint8_t sc_tx_busy; volatile uint8_t sc_tx_done; volatile uint8_t sc_tx_stopped; volatile uint8_t sc_st_check; uint8_t *sc_tba; int sc_tbc; int sc_heldtbc; volatile uint8_t sc_heldchange; void *sc_sicookie; }; /* * For sc_hwflags: */ #define SER_HW_CONSOLE 0x01 static void ser_break(struct ser_softc *, int); static void ser_hwiflow(struct ser_softc *, int); static void ser_iflush(struct ser_softc *); static void ser_loadchannelregs(struct ser_softc *); static void ser_modem(struct ser_softc *, int); static void serdiag(void *); static int serhwiflow(struct tty *, int); static void serinit(int); static void serinitcons(int); static int sermintr(void *); static int sertrintr(void *); static int serparam(struct tty *, struct termios *); static void serstart(struct tty *); struct consdev; void sercnprobe(struct consdev *); void sercninit(struct consdev *); int sercngetc(dev_t); void sercnputc(dev_t, int); void sercnpollc(dev_t, int); static void sermsrint(struct ser_softc *, struct tty*); static void serrxint(struct ser_softc *, struct tty*); static void ser_shutdown(struct ser_softc *); static int serspeed(long); static void sersoft(void *); static void sertxint(struct ser_softc *, struct tty*); /* * Autoconfig stuff */ static int sermatch(device_t, cfdata_t, void *); static void serattach(device_t, device_t, void *); CFATTACH_DECL_NEW(ser, sizeof(struct ser_softc), sermatch, serattach, NULL, NULL); dev_type_open(seropen); dev_type_close(serclose); dev_type_read(serread); dev_type_write(serwrite); dev_type_ioctl(serioctl); dev_type_stop(serstop); dev_type_tty(sertty); dev_type_poll(serpoll); const struct cdevsw ser_cdevsw = { .d_open = seropen, .d_close = serclose, .d_read = serread, .d_write = serwrite, .d_ioctl = serioctl, .d_stop = serstop, .d_tty = sertty, .d_poll = serpoll, .d_mmap = nommap, .d_kqfilter = ttykqfilter, .d_discard = nodiscard, .d_flag = D_TTY }; #ifndef SERCONSOLE #define SERCONSOLE 0 #endif int serconsole = SERCONSOLE; /* patchable */ /*ARGSUSED*/ static int sermatch(device_t parent, cfdata_t cf, void *aux) { static int ser_matched = 0; /* Match at most one ser unit */ if (strcmp((char *)aux, "ser") || ser_matched) return 0; ser_matched = 1; return 1; } /*ARGSUSED*/ static void serattach(device_t parent, device_t self, void *aux) { struct ser_softc *sc = device_private(self); sc->sc_dev = self; if (intr_establish(1, USER_VEC, 0, (hw_ifun_t)sermintr, sc) == NULL) aprint_error(": Can't establish interrupt (1)\n"); if (intr_establish(2, USER_VEC, 0, (hw_ifun_t)sermintr, sc) == NULL) aprint_error(": Can't establish interrupt (2)\n"); if (intr_establish(14, USER_VEC, 0, (hw_ifun_t)sermintr, sc) == NULL) aprint_error(": Can't establish interrupt (14)\n"); if (intr_establish(9, USER_VEC, 0, (hw_ifun_t)sertrintr, sc) == NULL) aprint_error(": Can't establish interrupt (9)\n"); if (intr_establish(10, USER_VEC, 0, (hw_ifun_t)sertrintr, sc) == NULL) aprint_error(": Can't establish interrupt (10)\n"); if (intr_establish(11, USER_VEC, 0, (hw_ifun_t)sertrintr, sc) == NULL) aprint_error(": Can't establish interrupt (11)\n"); if (intr_establish(12, USER_VEC, 0, (hw_ifun_t)sertrintr, sc) == NULL) aprint_error(": Can't establish interrupt (12)\n"); sc->sc_sicookie = softint_establish(SOFTINT_SERIAL, sersoft, sc); 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); callout_init(&sc->sc_diag_ch, 0); if (serconsole) { /* * Activate serial console when DCD present... */ if ((MFP->mf_gpip & MCR_DCD) == 0) SET(sc->sc_hwflags, SER_HW_CONSOLE); } aprint_normal(": modem1 on 68901 MFP1 USART\n"); if (ISSET(sc->sc_hwflags, SER_HW_CONSOLE)) { serinit(CONSBAUD); aprint_normal_dev(self, "console\n"); } } #ifdef SER_DEBUG void serstatus(struct ser_softc *, char *); void serstatus(struct ser_softc *sc, char *str) { struct tty *tp = sc->sc_tty; printf("%s: %s %sclocal %sdcd %sts_carr_on %sdtr %stx_stopped\n", device_xname(sc->sc_dev), 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", device_xname(sc->sc_dev), 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_t dev, int flag, int mode, struct lwp *l) { int unit = SERUNIT(dev); struct ser_softc *sc; struct tty *tp; int s, s2; int error = 0; sc = device_lookup_private(&ser_cd, unit); if (sc == NULL) return ENXIO; if (!sc->sc_tty) { tp = sc->sc_tty = tty_alloc(); tty_attach(tp); } else tp = sc->sc_tty; if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp)) 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 = splhigh(); /* * 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 = (*tp->t_linesw->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_t dev, int flag, int mode, struct lwp *l) { int unit = SERUNIT(dev); struct ser_softc *sc = device_lookup_private(&ser_cd, unit); struct tty *tp = sc->sc_tty; /* XXX This is for cons.c. */ if (!ISSET(tp->t_state, TS_ISOPEN)) return 0; (*tp->t_linesw->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_t dev, struct uio *uio, int flag) { struct ser_softc *sc = device_lookup_private(&ser_cd, SERUNIT(dev)); struct tty *tp = sc->sc_tty; return (*tp->t_linesw->l_read)(tp, uio, flag); } int serwrite(dev_t dev, struct uio *uio, int flag) { struct ser_softc *sc = device_lookup_private(&ser_cd, SERUNIT(dev)); struct tty *tp = sc->sc_tty; return (*tp->t_linesw->l_write)(tp, uio, flag); } int serpoll(dev_t dev, int events, struct lwp *l) { struct ser_softc *sc = device_lookup_private(&ser_cd, SERUNIT(dev)); struct tty *tp = sc->sc_tty; return (*tp->t_linesw->l_poll)(tp, events, l); } struct tty * sertty(dev_t dev) { struct ser_softc *sc = device_lookup_private(&ser_cd, SERUNIT(dev)); struct tty *tp = sc->sc_tty; return tp; } int serioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) { int unit = SERUNIT(dev); struct ser_softc *sc = device_lookup_private(&ser_cd, unit); struct tty *tp = sc->sc_tty; int error; error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l); if (error != EPASSTHROUGH) return error; error = ttioctl(tp, cmd, data, flag, l); if (error != EPASSTHROUGH) 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 = kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_PRIVSET, tp); if (error) return error; sc->sc_swflags = *(int *)data; break; case TIOCMSET: case TIOCMBIS: case TIOCMBIC: case TIOCMGET: default: return EPASSTHROUGH; } #ifdef SER_DEBUG serstatus(sc, "serioctl "); #endif return 0; } void ser_break(struct ser_softc *sc, int onoff) { int s; s = splhigh(); 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(struct ser_softc *sc, int onoff) { int s; s = splhigh(); 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(struct tty *tp, struct termios *t) { struct ser_softc *sc = device_lookup_private(&ser_cd, SERUNIT(tp->t_dev)); int ospeed = serspeed(t->c_ospeed); uint8_t 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 = splhigh(); 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)(*tp->t_linesw->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(struct ser_softc *sc) { uint8_t tmp; /* flush any pending I/O */ while (ISSET(MFP->mf_rsr, RSR_CIP|RSR_BFULL)) tmp = MFP->mf_udr; __USE(tmp); } void ser_loadchannelregs(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(struct tty *tp, int block) { struct ser_softc *sc = device_lookup_private(&ser_cd, SERUNIT(tp->t_dev)); int s; if (sc->sc_mcr_rts == 0) return 0; s = splhigh(); 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(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(struct tty *tp) { struct ser_softc *sc = device_lookup_private(&ser_cd, 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 (!ttypull(tp)) goto stopped; /* Grab the first contiguous region of buffer space. */ { uint8_t *tba; int tbc; tba = tp->t_outq.c_cf; tbc = ndqb(&tp->t_outq, 0); (void)splhigh(); 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(struct tty *tp, int flag) { struct ser_softc *sc = device_lookup_private(&ser_cd, SERUNIT(tp->t_dev)); int s; s = splhigh(); 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(void *arg) { struct ser_softc *sc = arg; int overflows, floods; int s; s = splhigh(); 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", device_xname(sc->sc_dev), overflows, overflows == 1 ? "" : "s", floods, floods == 1 ? "" : "s"); } static void ser_shutdown(struct ser_softc *sc) { int s; struct tty *tp = sc->sc_tty; s = splhigh(); /* 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(struct ser_softc *sc, struct tty *tp) { u_int get, cc, scc; int code; uint8_t rsr; int s; static const 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) callout_reset(&sc->sc_diag_ch, 60 * hz, serdiag, sc); } 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) callout_reset(&sc->sc_diag_ch, 60 * hz, serdiag, sc); } code = sc->sc_rbuf[get] | lsrmap[(rsr & (RSR_BREAK|RSR_FERR|RSR_PERR)) >> 3]; (*tp->t_linesw->l_rint)(code, tp); get = (get + 1) & RXBUFMASK; } sc->sc_rbget = get; s = splhigh(); 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(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)); (*tp->t_linesw->l_start)(tp); } static void sermsrint(struct ser_softc *sc, struct tty *tp) { uint8_t msr, delta; int s; s = splhigh(); 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)(*tp->t_linesw->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; (*tp->t_linesw->l_start)(tp); } else { sc->sc_tx_stopped = 1; serstop(tp, 0); } } #ifdef SER_DEBUG serstatus(sc, "sermsrint"); #endif } void sersoft(void *arg) { struct ser_softc *sc = arg; struct tty *tp; 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(void *arg) { struct ser_softc *sc = arg; uint8_t 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; } softint_schedule(sc->sc_sicookie); return 1; } int sertrintr(void *arg) { struct ser_softc *sc = arg; u_int put, cc; uint8_t 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; } } softint_schedule(sc->sc_sicookie); return 1; } static int serspeed(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 } /* * Following are all routines needed for SER to act as console */ #include void sercnprobe(struct consdev *cp) { /* * Activate serial console when DCD present... */ if (MFP->mf_gpip & MCR_DCD) { cp->cn_pri = CN_DEAD; return; } /* initialize required fields */ /* XXX: LWP What unit? */ cp->cn_dev = makedev(cdevsw_lookup_major(&ser_cdevsw), 0); if (serconsole) cp->cn_pri = CN_REMOTE; /* Force a serial port console */ else cp->cn_pri = CN_NORMAL; } void sercninit(struct consdev *cp) { serinitcons(CONSBAUD); } /* * Initialize UART to known state. */ void serinit(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(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_t dev) { uint8_t stat, c; int s; s = splhigh(); 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; } #if 1 u_int s_imra; u_int s_stat1, s_stat2, s_stat3; #endif void sercnputc(dev_t dev, int c) { int timo; uint8_t 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); #if 1 s_imra = imra; #endif /* wait for any pending transmission to finish */ timo = 50000; #if 1 s_stat1 = MFP->mf_tsr; #endif while (!ISSET(stat = MFP->mf_tsr, TSR_BE) && --timo) ; MFP->mf_udr = c; /* wait for this transmission to complete */ timo = 1500000; #if 1 s_stat2 = MFP->mf_tsr; #endif while (!ISSET(stat = MFP->mf_tsr, TSR_BE) && --timo) ; #if 1 s_stat3 = MFP->mf_tsr; #endif /* Clear pending serial interrupts and re-enable */ MFP->mf_ipra = (uint8_t)~imra; single_inst_bset_b(MFP->mf_imra, imra); } void sercnpollc(dev_t dev, int on) { }