/* $OpenBSD: pccom.c,v 1.10 1996/12/18 16:51:45 millert Exp $ */ /* $NetBSD: com.c,v 1.82.4.1 1996/06/02 09:08:00 mrg Exp $ */ /*- * Copyright (c) 1993, 1994, 1995, 1996 * Charles M. Hannum. All rights reserved. * 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. 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 */ /* * PCCOM driver, uses National Semiconductor NS16450/NS16550AF UART */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef COM_HAYESP #include #endif #define com_lcr com_cfcr #include "pccomvar.h" #include "pccom.h" /* XXX: These belong elsewhere */ cdev_decl(com); bdev_decl(com); static u_char tiocm_xxx2mcr __P((int)); /* * XXX the following two cfattach structs should be different, and possibly * XXX elsewhere. */ int comprobe __P((struct device *, void *, void *)); void comattach __P((struct device *, struct device *, void *)); void com_absent_notify __P((struct com_softc *sc)); void comstart_pending __P((void *)); #if NPCCOM_ISA struct cfattach pccom_isa_ca = { sizeof(struct com_softc), comprobe, comattach }; #endif #if NPCCOM_COMMULTI struct cfattach pccom_commulti_ca = { sizeof(struct com_softc), comprobe, comattach }; #endif struct cfdriver pccom_cd = { NULL, "pccom", DV_TTY }; void cominit __P((bus_space_tag_t, bus_space_handle_t, int)); #ifndef CONSPEED #define CONSPEED B9600 #endif #if defined(COMCONSOLE) || defined(PCCOMCONSOLE) int comdefaultrate = CONSPEED; /* XXX why set default? */ #else int comdefaultrate = TTYDEF_SPEED; #endif int comconsaddr; int comconsinit; int comconsattached; bus_space_tag_t comconsiot; bus_space_handle_t comconsioh; tcflag_t comconscflag = TTYDEF_CFLAG; int commajor; int comsopen = 0; int comevents = 0; #ifdef KGDB #include extern int kgdb_dev; extern int kgdb_rate; extern int kgdb_debug_init; #endif #define DEVUNIT(x) (minor(x) & 0x7f) #define DEVCUA(x) (minor(x) & 0x80) /* Macros to clear/set/test flags. */ #define SET(t, f) (t) |= (f) #define CLR(t, f) (t) &= ~(f) #define ISSET(t, f) ((t) & (f)) #if NPCCOM_PCMCIA #include int com_pcmcia_match __P((struct device *, void *, void *)); void com_pcmcia_attach __P((struct device *, struct device *, void *)); int com_pcmcia_detach __P((struct device *)); struct cfattach pccom_pcmcia_ca = { sizeof(struct com_softc), com_pcmcia_match, comattach, com_pcmcia_detach }; int com_pcmcia_mod __P((struct pcmcia_link *pc_link, struct device *self, struct pcmcia_conf *pc_cf, struct cfdata *cf)); /* additional setup needed for pcmcia devices */ /* modify config entry */ int com_pcmcia_mod(pc_link, self, pc_cf, cf) struct pcmcia_link *pc_link; struct device *self; struct pcmcia_conf *pc_cf; struct cfdata *cf; { int err; struct pcmciadevs *dev = pc_link->device; struct ed_softc *sc = (void *)self; if (!(err = PCMCIA_BUS_CONFIG(pc_link->adapter, pc_link, self, pc_cf, cf))) { pc_cf->memwin = 0; if (pc_cf->cfgtype == 0) pc_cf->cfgtype = CFGENTRYID; /* determine from ioaddr */ } return err; } int com_pcmcia_isa_attach __P((struct device *, void *, void *, struct pcmcia_link *)); int com_pcmcia_remove __P((struct pcmcia_link *, struct device *)); static struct pcmcia_com { struct pcmcia_device pcd; } pcmcia_com = { {"PCMCIA Modem card", com_pcmcia_mod, com_pcmcia_isa_attach, NULL, com_pcmcia_remove} }; struct pcmciadevs pcmcia_com_devs[] = { { "pccom", 0, NULL, "*MODEM*", NULL, NULL, NULL, (void *)&pcmcia_com }, { "pccom", 0, NULL, NULL, "*MODEM*", NULL, NULL, (void *)&pcmcia_com }, { "pccom", 0, NULL, NULL, NULL, "*MODEM*", NULL, (void *)&pcmcia_com }, {NULL} }; #define ncom_pcmcia_devs sizeof(pcmcia_com_devs)/sizeof(pcmcia_com_devs[0]) int com_pcmcia_match(parent, match, aux) struct device *parent; void *match, *aux; { return pcmcia_slave_match(parent, match, aux, pcmcia_com_devs, ncom_pcmcia_devs); } int com_pcmcia_isa_attach(parent, match, aux, pc_link) struct device *parent; void *match; void *aux; struct pcmcia_link *pc_link; { struct isa_attach_args *ia = aux; struct com_softc *sc = match; int rval; if (rval = comprobe(parent, sc->sc_dev.dv_cfdata, ia)) { if (ISSET(pc_link->flags, PCMCIA_REATTACH)) { #ifdef PCCOM_DEBUG printf("comreattach, hwflags=%x\n", sc->sc_hwflags); #endif sc->sc_hwflags = COM_HW_REATTACH | (sc->sc_hwflags & (COM_HW_ABSENT_PENDING|COM_HW_CONSOLE)); } else sc->sc_hwflags = 0; sc->sc_ic = ia->ia_ic; } return rval; } /* * Called by config_detach attempts, shortly after com_pcmcia_remove * was called. */ int com_pcmcia_detach(self) struct device *self; { struct com_softc *sc = (void *)self; if (ISSET(sc->sc_hwflags, COM_HW_ABSENT_PENDING)) { /* don't let it really be detached, it is still open */ return EBUSY; } return 0; /* OK! */ } /* * called by pcmcia framework to accept/reject remove attempts. * If we return 0, then the detach will proceed. */ int com_pcmcia_remove(pc_link, self) struct pcmcia_link *pc_link; struct device *self; { struct com_softc *sc = (void *)self; struct tty *tp; int s; if (!sc->sc_tty) goto ok; tp = sc->sc_tty; /* not in use ? if so, return "OK" */ if (!ISSET(tp->t_state, TS_ISOPEN) && !ISSET(tp->t_state, TS_WOPEN)) { ttyfree(sc->sc_tty); sc->sc_tty = NULL; ok: isa_intr_disestablish(sc->sc_ic, sc->sc_ih); sc->sc_ih = NULL; SET(sc->sc_hwflags, COM_HW_ABSENT); return 0; /* OK! */ } /* * Not easily removed. Put device into a dead state, clean state * as best we can. notify all waiters. */ SET(sc->sc_hwflags, COM_HW_ABSENT|COM_HW_ABSENT_PENDING); #ifdef PCCOM_DEBUG printf("pending detach flags %x\n", sc->sc_hwflags); #endif s = spltty(); com_absent_notify(sc); splx(s); return 0; } #if 0 void com_pcmcia_attach(parent, self, aux) struct device *parent, *self; void *aux; { struct pcmcia_attach_args *paa = aux; printf("com_pcmcia_attach %p %p %p\n", parent, self, aux); delay(2000000); if (!pcmcia_configure(parent, self, paa->paa_link)) { struct com_softc *sc = (void *)self; sc->sc_hwflags |= COM_HW_ABSENT; printf(": not attached\n"); } } #endif #endif /* * must be called at spltty() or higher. */ void com_absent_notify(sc) struct com_softc *sc; { struct tty *tp = sc->sc_tty; if (tp) { CLR(tp->t_state, TS_CARR_ON|TS_BUSY); ttyflush(tp, FREAD|FWRITE); } } int comspeed(speed) long speed; { #define divrnd(n, q) (((n)*2/(q)+1)/2) /* divide and round off */ int x, err; if (speed == 0) return 0; if (speed < 0) return -1; x = divrnd((COM_FREQ / 16), speed); if (x <= 0) return -1; err = divrnd((COM_FREQ / 16) * 1000, speed * x) - 1000; if (err < 0) err = -err; if (err > COM_TOLERANCE) return -1; return x; #undef divrnd(n, q) } int comprobe1(iot, ioh, iobase) bus_space_tag_t iot; bus_space_handle_t ioh; int iobase; { int i, k; /* force access to id reg */ bus_space_write_1(iot, ioh, com_lcr, 0); bus_space_write_1(iot, ioh, com_iir, 0); for (i = 0; i < 32; i++) { k = bus_space_read_1(iot, ioh, com_iir); if (k & 0x38) { bus_space_read_1(iot, ioh, com_data); /* cleanup */ } else break; } if (i >= 32) return 0; return 1; } #ifdef COM_HAYESP int comprobeHAYESP(hayespioh, sc) bus_space_handle_t hayespioh; struct com_softc *sc; { char val, dips; int combaselist[] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8 }; bus_space_tag_t iot = sc->sc_iot; /* * Hayes ESP cards have two iobases. One is for compatibility with * 16550 serial chips, and at the same ISA PC base addresses. The * other is for ESP-specific enhanced features, and lies at a * different addressing range entirely (0x140, 0x180, 0x280, or 0x300). */ /* Test for ESP signature */ if ((bus_space_read_1(iot, hayespioh, 0) & 0xf3) == 0) return 0; /* * ESP is present at ESP enhanced base address; unknown com port */ /* Get the dip-switch configurations */ bus_space_write_1(iot, hayespioh, HAYESP_CMD1, HAYESP_GETDIPS); dips = bus_space_read_1(iot, hayespioh, HAYESP_STATUS1); /* Determine which com port this ESP card services: bits 0,1 of */ /* dips is the port # (0-3); combaselist[val] is the com_iobase */ if (sc->sc_iobase != combaselist[dips & 0x03]) return 0; printf(": ESP"); /* Check ESP Self Test bits. */ /* Check for ESP version 2.0: bits 4,5,6 == 010 */ bus_space_write_1(iot, hayespioh, HAYESP_CMD1, HAYESP_GETTEST); val = bus_space_read_1(iot, hayespioh, HAYESP_STATUS1); /* Clear reg 1 */ val = bus_space_read_1(iot, hayespioh, HAYESP_STATUS2); if ((val & 0x70) < 0x20) { printf("-old (%o)", val & 0x70); /* we do not support the necessary features */ return 0; } /* Check for ability to emulate 16550: bit 8 == 1 */ if ((dips & 0x80) == 0) { printf(" slave"); /* XXX Does slave really mean no 16550 support?? */ return 0; } /* * If we made it this far, we are a full-featured ESP v2.0 (or * better), at the correct com port address. */ SET(sc->sc_hwflags, COM_HW_HAYESP); printf(", 1024 byte fifo\n"); return 1; } #endif int comprobe(parent, match, aux) struct device *parent; void *match, *aux; { bus_space_tag_t iot; bus_space_handle_t ioh; int iobase, needioh; int rv = 1; #if NPCCOM_ISA || NPCCOM_PCMCIA #define IS_ISA(parent) \ (!strcmp((parent)->dv_cfdata->cf_driver->cd_name, "isa") || \ !strcmp((parent)->dv_cfdata->cf_driver->cd_name, "pcmcia")) #elif NPCCOM_ISA #define IS_ISA(parent) \ !strcmp((parent)->dv_cfdata->cf_driver->cd_name, "isa") #endif /* * XXX should be broken out into functions for isa probe and * XXX for commulti probe, with a helper function that contains * XXX most of the interesting stuff. */ #if NPCCOM_ISA || NPCCOM_PCMCIA if (IS_ISA(parent)) { struct isa_attach_args *ia = aux; iot = ia->ia_iot; iobase = ia->ia_iobase; needioh = 1; } else #endif #if NPCCOM_COMMULTI if (1) { struct cfdata *cf = match; struct commulti_attach_args *ca = aux; if (cf->cf_loc[0] != -1 && cf->cf_loc[0] != ca->ca_slave) return (0); iot = ca->ca_iot; iobase = ca->ca_iobase; ioh = ca->ca_ioh; needioh = 0; } else #endif return(0); /* This cannot happen */ /* if it's in use as console, it's there. */ if (iobase == comconsaddr && !comconsattached) goto out; if (needioh && bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { rv = 0; goto out; } rv = comprobe1(iot, ioh, iobase); if (needioh) bus_space_unmap(iot, ioh, COM_NPORTS); out: #if NPCCOM_ISA || NPCCOM_PCMCIA if (rv && IS_ISA(parent)) { struct isa_attach_args *ia = aux; ia->ia_iosize = COM_NPORTS; ia->ia_msize = 0; } #endif return (rv); } void comattach(parent, self, aux) struct device *parent, *self; void *aux; { struct com_softc *sc = (void *)self; int iobase, irq; bus_space_tag_t iot; bus_space_handle_t ioh; #ifdef COM_HAYESP int hayesp_ports[] = { 0x140, 0x180, 0x280, 0x300, 0 }; int *hayespp; #endif /* * XXX should be broken out into functions for isa attach and * XXX for commulti attach, with a helper function that contains * XXX most of the interesting stuff. */ if (ISSET(sc->sc_hwflags, COM_HW_REATTACH)) { int s; s = spltty(); com_absent_notify(sc); splx(s); } else sc->sc_hwflags = 0; sc->sc_swflags = 0; #if NPCCOM_ISA || NPCCOM_PCMCIA if (IS_ISA(parent)) { struct isa_attach_args *ia = aux; /* * We're living on an isa. */ iobase = ia->ia_iobase; iot = ia->ia_iot; if (iobase != comconsaddr) { if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) panic("comattach: io mapping failed"); } else ioh = comconsioh; irq = ia->ia_irq; } else #endif #if NPCCOM_COMMULTI if (1) { struct commulti_attach_args *ca = aux; /* * We're living on a commulti. */ iobase = ca->ca_iobase; iot = ca->ca_iot; ioh = ca->ca_ioh; irq = IRQUNK; if (ca->ca_noien) SET(sc->sc_hwflags, COM_HW_NOIEN); } else #endif panic("comattach: impossible"); sc->sc_iot = iot; sc->sc_ioh = ioh; sc->sc_iobase = iobase; if (iobase == comconsaddr) { comconsattached = 1; /* * Need to reset baud rate, etc. of next print so reset * comconsinit. Also make sure console is always "hardwired". */ delay(1000); /* wait for output to finish */ comconsinit = 0; SET(sc->sc_hwflags, COM_HW_CONSOLE); SET(sc->sc_swflags, COM_SW_SOFTCAR); } #ifdef COM_HAYESP /* Look for a Hayes ESP board. */ for (hayespp = hayesp_ports; *hayespp != 0; hayespp++) { bus_space_handle_t hayespioh; #define HAYESP_NPORTS 8 /* XXX XXX XXX ??? ??? ??? */ if (bus_space_map(iot, *hayespp, HAYESP_NPORTS, 0, &hayespioh)) continue; if (comprobeHAYESP(hayespioh, sc)) { sc->sc_hayespbase = *hayespp; sc->sc_hayespioh = hayespioh; sc->sc_fifolen = 1024; break; } bus_space_unmap(iot, hayespioh, HAYESP_NPORTS); } /* No ESP; look for other things. */ if (*hayespp == 0) { #endif sc->sc_fifolen = 1; /* look for a NS 16550AF UART with FIFOs */ bus_space_write_1(iot, ioh, com_fifo, FIFO_ENABLE | FIFO_RCV_RST | FIFO_XMT_RST | FIFO_TRIGGER_14); delay(100); if (ISSET(bus_space_read_1(iot, ioh, com_iir), IIR_FIFO_MASK) == IIR_FIFO_MASK) if (ISSET(bus_space_read_1(iot, ioh, com_fifo), FIFO_TRIGGER_14) == FIFO_TRIGGER_14) { SET(sc->sc_hwflags, COM_HW_FIFO); printf(": ns16550a, working fifo\n"); sc->sc_fifolen = 16; } else printf(": ns16550, broken fifo\n"); else printf(": ns8250 or ns16450, no fifo\n"); bus_space_write_1(iot, ioh, com_fifo, 0); #ifdef COM_HAYESP } #endif /* disable interrupts */ bus_space_write_1(iot, ioh, com_ier, 0); bus_space_write_1(iot, ioh, com_mcr, 0); if (irq != IRQUNK) { #if NPCCOM_ISA || NPCCOM_PCMCIA if (IS_ISA(parent)) { struct isa_attach_args *ia = aux; sc->sc_ih = isa_intr_establish(ia->ia_ic, irq, IST_EDGE, IPL_HIGH, comintr, sc, sc->sc_dev.dv_xname); } else #endif panic("comattach: IRQ but can't have one"); } #ifdef KGDB if (kgdb_dev == makedev(commajor, unit)) { if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) kgdb_dev = -1; /* can't debug over console port */ else { cominit(iot, ioh, kgdb_rate); if (kgdb_debug_init) { /* * Print prefix of device name, * let kgdb_connect print the rest. */ printf("%s: ", sc->sc_dev.dv_xname); kgdb_connect(1); } else printf("%s: kgdb enabled\n", sc->sc_dev.dv_xname); } } #endif /* XXX maybe move up some? */ if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) printf("%s: console\n", sc->sc_dev.dv_xname); } int comopen(dev, flag, mode, p) dev_t dev; int flag, mode; struct proc *p; { int unit = DEVUNIT(dev); struct com_softc *sc; bus_space_tag_t iot; bus_space_handle_t ioh; struct tty *tp; int s; int error = 0; if (unit >= pccom_cd.cd_ndevs) return ENXIO; sc = pccom_cd.cd_devs[unit]; if (!sc || ISSET(sc->sc_hwflags, COM_HW_ABSENT|COM_HW_ABSENT_PENDING)) return ENXIO; s = spltty(); if (!sc->sc_tty) { tp = sc->sc_tty = ttymalloc(); tty_attach(tp); } else tp = sc->sc_tty; splx(s); tp->t_oproc = comstart; tp->t_param = comparam; tp->t_hwiflow = comhwiflow; tp->t_dev = dev; if (!ISSET(tp->t_state, TS_ISOPEN)) { SET(tp->t_state, TS_WOPEN); ttychars(tp); tp->t_iflag = TTYDEF_IFLAG; tp->t_oflag = TTYDEF_OFLAG; if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) tp->t_cflag = comconscflag; else tp->t_cflag = TTYDEF_CFLAG; if (ISSET(sc->sc_swflags, COM_SW_CLOCAL)) SET(tp->t_cflag, CLOCAL); if (ISSET(sc->sc_swflags, COM_SW_CRTSCTS)) SET(tp->t_cflag, CRTSCTS); if (ISSET(sc->sc_swflags, COM_SW_MDMBUF)) SET(tp->t_cflag, MDMBUF); tp->t_lflag = TTYDEF_LFLAG; tp->t_ispeed = tp->t_ospeed = comdefaultrate; s = spltty(); sc->sc_initialize = 1; comparam(tp, &tp->t_termios); ttsetwater(tp); sc->sc_rxput = sc->sc_rxget = sc->sc_tbc = 0; iot = sc->sc_iot; ioh = sc->sc_ioh; #ifdef COM_HAYESP /* Setup the ESP board */ if (ISSET(sc->sc_hwflags, COM_HW_HAYESP)) { bus_space_handle_t hayespioh = sc->sc_hayespioh; bus_space_write_1(iot, ioh, com_fifo, FIFO_DMA_MODE|FIFO_ENABLE| FIFO_RCV_RST|FIFO_XMT_RST|FIFO_TRIGGER_8); /* Set 16550 compatibility mode */ bus_space_write_1(iot, hayespioh, HAYESP_CMD1, HAYESP_SETMODE); bus_space_write_1(iot, hayespioh, HAYESP_CMD2, HAYESP_MODE_FIFO|HAYESP_MODE_RTS| HAYESP_MODE_SCALE); /* Set RTS/CTS flow control */ bus_space_write_1(iot, hayespioh, HAYESP_CMD1, HAYESP_SETFLOWTYPE); bus_space_write_1(iot, hayespioh, HAYESP_CMD2, HAYESP_FLOW_RTS); bus_space_write_1(iot, hayespioh, HAYESP_CMD2, HAYESP_FLOW_CTS); /* Set flow control levels */ bus_space_write_1(iot, hayespioh, HAYESP_CMD1, HAYESP_SETRXFLOW); bus_space_write_1(iot, hayespioh, HAYESP_CMD2, HAYESP_HIBYTE(HAYESP_RXHIWMARK)); bus_space_write_1(iot, hayespioh, HAYESP_CMD2, HAYESP_LOBYTE(HAYESP_RXHIWMARK)); bus_space_write_1(iot, hayespioh, HAYESP_CMD2, HAYESP_HIBYTE(HAYESP_RXLOWMARK)); bus_space_write_1(iot, hayespioh, HAYESP_CMD2, HAYESP_LOBYTE(HAYESP_RXLOWMARK)); } else #endif if (ISSET(sc->sc_hwflags, COM_HW_FIFO)) { /* * (Re)enable and drain FIFOs. * * Certain SMC chips cause problems if the FIFOs are * enabled while input is ready. Turn off the FIFO * if necessary to clear the input. Test the input * ready bit after enabling the FIFOs to handle races * between enabling and fresh input. * * Set the FIFO threshold based on the receive speed. */ for (;;) { bus_space_write_1(iot, ioh, com_fifo, 0); delay(100); (void) bus_space_read_1(iot, ioh, com_data); bus_space_write_1(iot, ioh, com_fifo, FIFO_ENABLE | FIFO_RCV_RST | FIFO_XMT_RST | (tp->t_ispeed <= 1200 ? FIFO_TRIGGER_1 : FIFO_TRIGGER_8)); delay(100); if(!ISSET(bus_space_read_1(iot, ioh, com_lsr), LSR_RXRDY)) break; } } /* flush any pending I/O */ while (ISSET(bus_space_read_1(iot, ioh, com_lsr), LSR_RXRDY)) (void) bus_space_read_1(iot, ioh, com_data); /* you turn me on, baby */ sc->sc_mcr = MCR_DTR | MCR_RTS; if (!ISSET(sc->sc_hwflags, COM_HW_NOIEN)) SET(sc->sc_mcr, MCR_IENABLE); bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr); sc->sc_ier = IER_ERXRDY | IER_ERLS | IER_EMSC; bus_space_write_1(iot, ioh, com_ier, sc->sc_ier); sc->sc_msr = bus_space_read_1(iot, ioh, com_msr); if (ISSET(sc->sc_swflags, COM_SW_SOFTCAR) || DEVCUA(dev) || ISSET(sc->sc_msr, MSR_DCD) || ISSET(tp->t_cflag, MDMBUF)) SET(tp->t_state, TS_CARR_ON); else CLR(tp->t_state, TS_CARR_ON); } else if (ISSET(tp->t_state, TS_XCLUDE) && p->p_ucred->cr_uid != 0) return EBUSY; else s = spltty(); if (DEVCUA(dev)) { if (ISSET(tp->t_state, TS_ISOPEN)) { /* Ah, but someone already is dialed in... */ splx(s); return EBUSY; } sc->sc_cua = 1; /* We go into CUA mode */ } /* wait for carrier if necessary */ if (ISSET(flag, O_NONBLOCK)) { if (!DEVCUA(dev) && sc->sc_cua) { /* Opening TTY non-blocking... but the CUA is busy */ splx(s); return EBUSY; } } else { while (!(DEVCUA(dev) && sc->sc_cua) && !ISSET(tp->t_cflag, CLOCAL) && !ISSET(tp->t_state, TS_CARR_ON)) { SET(tp->t_state, TS_WOPEN); error = ttysleep(tp, &tp->t_rawq, TTIPRI | PCATCH, ttopen, 0); if (error) { /* XXX should turn off chip if we're the only waiter */ if (DEVCUA(dev)) sc->sc_cua = 0; CLR(tp->t_state, TS_WOPEN); splx(s); return error; } } } splx(s); return (*linesw[tp->t_line].l_open)(dev, tp); } int comclose(dev, flag, mode, p) dev_t dev; int flag, mode; struct proc *p; { int unit = DEVUNIT(dev); struct com_softc *sc = pccom_cd.cd_devs[unit]; struct tty *tp = sc->sc_tty; bus_space_tag_t iot = sc->sc_iot; bus_space_handle_t ioh = sc->sc_ioh; int s; /* XXX This is for cons.c. */ if (!ISSET(tp->t_state, TS_ISOPEN)) return 0; (*linesw[tp->t_line].l_close)(tp, flag); s = spltty(); if (!ISSET(sc->sc_hwflags, COM_HW_ABSENT|COM_HW_ABSENT_PENDING)) { /* can't do any of this stuff .... */ CLR(sc->sc_lcr, LCR_SBREAK); bus_space_write_1(iot, ioh, com_lcr, sc->sc_lcr); bus_space_write_1(iot, ioh, com_ier, 0); if (ISSET(tp->t_cflag, HUPCL) && !ISSET(sc->sc_swflags, COM_SW_SOFTCAR)) { /* XXX perhaps only clear DTR */ bus_space_write_1(iot, ioh, com_mcr, 0); } } CLR(tp->t_state, TS_BUSY | TS_FLUSH); /* * FIFO off */ bus_space_write_1(iot, ioh, com_fifo, 0); sc->sc_cua = 0; splx(s); ttyclose(tp); #ifdef PCCOM_DEBUG /* mark it ready for more use if reattached earlier */ if (ISSET(sc->sc_hwflags, COM_HW_ABSENT_PENDING)) { printf("comclose pending cleared\n"); } #endif CLR(sc->sc_hwflags, COM_HW_ABSENT_PENDING); #ifdef notyet /* XXXX */ if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { ttyfree(tp); sc->sc_tty = 0; } #endif return 0; } int comread(dev, uio, flag) dev_t dev; struct uio *uio; int flag; { struct com_softc *sc = pccom_cd.cd_devs[DEVUNIT(dev)]; struct tty *tp = sc->sc_tty; if (ISSET(sc->sc_hwflags, COM_HW_ABSENT|COM_HW_ABSENT_PENDING)) { int s = spltty(); com_absent_notify(sc); splx(s); return EIO; } return ((*linesw[tp->t_line].l_read)(tp, uio, flag)); } int comwrite(dev, uio, flag) dev_t dev; struct uio *uio; int flag; { struct com_softc *sc = pccom_cd.cd_devs[DEVUNIT(dev)]; struct tty *tp = sc->sc_tty; if (ISSET(sc->sc_hwflags, COM_HW_ABSENT|COM_HW_ABSENT_PENDING)) { int s = spltty(); com_absent_notify(sc); splx(s); return EIO; } return ((*linesw[tp->t_line].l_write)(tp, uio, flag)); } struct tty * comtty(dev) dev_t dev; { struct com_softc *sc = pccom_cd.cd_devs[DEVUNIT(dev)]; struct tty *tp = sc->sc_tty; return (tp); } static u_char tiocm_xxx2mcr(data) int data; { u_char m = 0; if (ISSET(data, TIOCM_DTR)) SET(m, MCR_DTR); if (ISSET(data, TIOCM_RTS)) SET(m, MCR_RTS); return m; } int comioctl(dev, cmd, data, flag, p) dev_t dev; u_long cmd; caddr_t data; int flag; struct proc *p; { int unit = DEVUNIT(dev); struct com_softc *sc = pccom_cd.cd_devs[unit]; struct tty *tp = sc->sc_tty; bus_space_tag_t iot = sc->sc_iot; bus_space_handle_t ioh = sc->sc_ioh; int error; if (ISSET(sc->sc_hwflags, COM_HW_ABSENT|COM_HW_ABSENT_PENDING)) { int s = spltty(); com_absent_notify(sc); splx(s); return EIO; } 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: SET(sc->sc_lcr, LCR_SBREAK); bus_space_write_1(iot, ioh, com_lcr, sc->sc_lcr); break; case TIOCCBRK: CLR(sc->sc_lcr, LCR_SBREAK); bus_space_write_1(iot, ioh, com_lcr, sc->sc_lcr); break; case TIOCSDTR: SET(sc->sc_mcr, sc->sc_dtr); bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr); break; case TIOCCDTR: CLR(sc->sc_mcr, sc->sc_dtr); bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr); break; case TIOCMSET: CLR(sc->sc_mcr, MCR_DTR | MCR_RTS); case TIOCMBIS: SET(sc->sc_mcr, tiocm_xxx2mcr(*(int *)data)); bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr); break; case TIOCMBIC: CLR(sc->sc_mcr, tiocm_xxx2mcr(*(int *)data)); bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr); break; case TIOCMGET: { u_char m; int bits = 0; m = sc->sc_mcr; if (ISSET(m, MCR_DTR)) SET(bits, TIOCM_DTR); if (ISSET(m, MCR_RTS)) SET(bits, TIOCM_RTS); m = sc->sc_msr; if (ISSET(m, MSR_DCD)) SET(bits, TIOCM_CD); if (ISSET(m, MSR_CTS)) SET(bits, TIOCM_CTS); if (ISSET(m, MSR_DSR)) SET(bits, TIOCM_DSR); if (ISSET(m, MSR_RI | MSR_TERI)) SET(bits, TIOCM_RI); if (bus_space_read_1(iot, ioh, com_ier)) SET(bits, TIOCM_LE); *(int *)data = bits; break; } case TIOCGFLAGS: { int driverbits, userbits = 0; driverbits = sc->sc_swflags; if (ISSET(driverbits, COM_SW_SOFTCAR)) SET(userbits, TIOCFLAG_SOFTCAR); if (ISSET(driverbits, COM_SW_CLOCAL)) SET(userbits, TIOCFLAG_CLOCAL); if (ISSET(driverbits, COM_SW_CRTSCTS)) SET(userbits, TIOCFLAG_CRTSCTS); if (ISSET(driverbits, COM_SW_MDMBUF)) SET(userbits, TIOCFLAG_MDMBUF); *(int *)data = userbits; break; } case TIOCSFLAGS: { int userbits, driverbits = 0; error = suser(p->p_ucred, &p->p_acflag); if (error != 0) return(EPERM); userbits = *(int *)data; if (ISSET(userbits, TIOCFLAG_SOFTCAR) || ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) SET(driverbits, COM_SW_SOFTCAR); if (ISSET(userbits, TIOCFLAG_CLOCAL)) SET(driverbits, COM_SW_CLOCAL); if (ISSET(userbits, TIOCFLAG_CRTSCTS)) SET(driverbits, COM_SW_CRTSCTS); if (ISSET(userbits, TIOCFLAG_MDMBUF)) SET(driverbits, COM_SW_MDMBUF); sc->sc_swflags = driverbits; break; } default: return ENOTTY; } return 0; } int comparam(tp, t) struct tty *tp; struct termios *t; { struct com_softc *sc = pccom_cd.cd_devs[DEVUNIT(tp->t_dev)]; bus_space_tag_t iot = sc->sc_iot; bus_space_handle_t ioh = sc->sc_ioh; int ospeed = comspeed(t->c_ospeed); u_char lcr; tcflag_t oldcflag; int s; if (ISSET(sc->sc_hwflags, COM_HW_ABSENT|COM_HW_ABSENT_PENDING)) { int s = spltty(); com_absent_notify(sc); splx(s); return EIO; } /* check requested parameters */ if (ospeed < 0 || (t->c_ispeed && t->c_ispeed != t->c_ospeed)) return EINVAL; lcr = ISSET(sc->sc_lcr, LCR_SBREAK); switch (ISSET(t->c_cflag, CSIZE)) { case CS5: SET(lcr, LCR_5BITS); break; case CS6: SET(lcr, LCR_6BITS); break; case CS7: SET(lcr, LCR_7BITS); break; case CS8: SET(lcr, LCR_8BITS); break; } if (ISSET(t->c_cflag, PARENB)) { SET(lcr, LCR_PENAB); if (!ISSET(t->c_cflag, PARODD)) SET(lcr, LCR_PEVEN); } if (ISSET(t->c_cflag, CSTOPB)) SET(lcr, LCR_STOPB); sc->sc_lcr = lcr; s = spltty(); if (ospeed == 0) { CLR(sc->sc_mcr, MCR_DTR); bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr); } /* * Set the FIFO threshold based on the receive speed, if we are * changing it. */ if (sc->sc_initialize || (tp->t_ispeed != t->c_ispeed)) { sc->sc_initialize = 0; if (ospeed != 0) { /* * Make sure the transmit FIFO is empty before * proceeding. If we don't do this, some revisions * of the UART will hang. Interestingly enough, * even if we do this will the last character is * still being pushed out, they don't hang. This * seems good enough. */ while (ISSET(tp->t_state, TS_BUSY)) { int error; ++sc->sc_halt; error = ttysleep(tp, &tp->t_outq, TTOPRI | PCATCH, "comprm", 0); --sc->sc_halt; if (error) { splx(s); comstart(tp); return (error); } } bus_space_write_1(iot, ioh, com_lcr, lcr | LCR_DLAB); bus_space_write_1(iot, ioh, com_dlbl, ospeed); bus_space_write_1(iot, ioh, com_dlbh, ospeed >> 8); bus_space_write_1(iot, ioh, com_lcr, lcr); SET(sc->sc_mcr, MCR_DTR); bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr); } else bus_space_write_1(iot, ioh, com_lcr, lcr); if (!ISSET(sc->sc_hwflags, COM_HW_HAYESP) && ISSET(sc->sc_hwflags, COM_HW_FIFO)) bus_space_write_1(iot, ioh, com_fifo, FIFO_ENABLE | (t->c_ispeed <= 1200 ? FIFO_TRIGGER_1 : FIFO_TRIGGER_8)); } else bus_space_write_1(iot, ioh, com_lcr, lcr); /* When not using CRTSCTS, RTS follows DTR. */ if (!ISSET(t->c_cflag, CRTSCTS)) { if (ISSET(sc->sc_mcr, MCR_DTR)) { if (!ISSET(sc->sc_mcr, MCR_RTS)) { SET(sc->sc_mcr, MCR_RTS); bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr); } } else { if (ISSET(sc->sc_mcr, MCR_RTS)) { CLR(sc->sc_mcr, MCR_RTS); bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr); } } sc->sc_dtr = MCR_DTR | MCR_RTS; } else sc->sc_dtr = MCR_DTR; /* and copy to tty */ tp->t_ispeed = t->c_ispeed; tp->t_ospeed = t->c_ospeed; oldcflag = tp->t_cflag; tp->t_cflag = t->c_cflag; /* * If DCD is off and MDMBUF is changed, ask the tty layer if we should * stop the device. */ if (!ISSET(sc->sc_msr, MSR_DCD) && !ISSET(sc->sc_swflags, COM_SW_SOFTCAR) && ISSET(oldcflag, MDMBUF) != ISSET(tp->t_cflag, MDMBUF) && (*linesw[tp->t_line].l_modem)(tp, 0) == 0) { CLR(sc->sc_mcr, sc->sc_dtr); bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr); } /* Just to be sure... */ splx(s); comstart(tp); return 0; } void comstart_pending(arg) void *arg; { struct com_softc *sc = arg; int s; s = spltty(); com_absent_notify(sc); splx(s); } /* * (un)block input via hw flowcontrol */ int comhwiflow(tp, block) struct tty *tp; int block; { struct com_softc *sc = pccom_cd.cd_devs[DEVUNIT(tp->t_dev)]; bus_space_tag_t iot = sc->sc_iot; bus_space_handle_t ioh = sc->sc_ioh; int s; /* * XXX * Is spltty needed at all ? sc->sc_mcr is only in comsoft() not comintr() */ s = spltty(); if (block) { /* When not using CRTSCTS, RTS follows DTR. */ if (ISSET(tp->t_cflag, MDMBUF)) { CLR(sc->sc_mcr, (MCR_DTR | MCR_RTS)); bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr); } else { CLR(sc->sc_mcr, MCR_RTS); bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr); } } else { /* When not using CRTSCTS, RTS follows DTR. */ if (ISSET(tp->t_cflag, MDMBUF)) { SET(sc->sc_mcr, (MCR_DTR | MCR_RTS)); bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr); } else { SET(sc->sc_mcr, MCR_RTS); bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr); } } splx(s); return 1; } void comstart(tp) struct tty *tp; { struct com_softc *sc = pccom_cd.cd_devs[DEVUNIT(tp->t_dev)]; bus_space_tag_t iot = sc->sc_iot; bus_space_handle_t ioh = sc->sc_ioh; int s, count; s = spltty(); if (ISSET(sc->sc_hwflags, COM_HW_ABSENT|COM_HW_ABSENT_PENDING)) { /* * not quite good enough: if caller is ttywait() it will * go to sleep immediately, so hang out a bit and then * prod caller again. */ com_absent_notify(sc); timeout(comstart_pending, sc, 1); goto out; } if (ISSET(tp->t_state, TS_BUSY)) goto out; if (ISSET(tp->t_state, TS_TIMEOUT | TS_TTSTOP) || sc->sc_halt > 0) goto stopped; if (ISSET(tp->t_cflag, CRTSCTS) && !ISSET(sc->sc_msr, MSR_CTS)) 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((caddr_t)&tp->t_outq); } selwakeup(&tp->t_wsel); } count = ndqb(&tp->t_outq, 0); splhigh(); if (count > 0) { int n; SET(tp->t_state, TS_BUSY); if (!ISSET(sc->sc_ier, IER_ETXRDY)) { SET(sc->sc_ier, IER_ETXRDY); bus_space_write_1(iot, ioh, com_ier, sc->sc_ier); } n = sc->sc_fifolen; if (n > count) n = count; sc->sc_tba = tp->t_outq.c_cf; while (--n >= 0) { bus_space_write_1(iot, ioh, com_data, *sc->sc_tba++); --count; } sc->sc_tbc = count; goto out; } stopped: if (ISSET(sc->sc_ier, IER_ETXRDY)) { CLR(sc->sc_ier, IER_ETXRDY); bus_space_write_1(iot, ioh, com_ier, sc->sc_ier); } out: splx(s); return; } /* * Stop output on a line. */ int comstop(tp, flag) struct tty *tp; int flag; { int s; struct com_softc *sc = pccom_cd.cd_devs[DEVUNIT(tp->t_dev)]; s = splhigh(); if (ISSET(tp->t_state, TS_BUSY)) { sc->sc_tbc = 0; if (!ISSET(tp->t_state, TS_TTSTOP)) SET(tp->t_state, TS_FLUSH); } splx(s); return 0; } void comdiag(arg) void *arg; { struct com_softc *sc = arg; int overflows; int s; s = spltty(); overflows = sc->sc_overflows; sc->sc_overflows = 0; splx(s); if (overflows) log(LOG_WARNING, "%s: %d silo overflow%s\n", sc->sc_dev.dv_xname, overflows, overflows == 1 ? "" : "s"); } #ifdef PCCOM_DEBUG int maxcc = 0; #endif void comsoft() { struct com_softc *sc; struct tty *tp; struct linesw *line; int unit, s, c; u_int rxget; 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 }; for (unit = 0; unit < pccom_cd.cd_ndevs; unit++) { sc = pccom_cd.cd_devs[unit]; if (sc == NULL) continue; tp = sc->sc_tty; /* * XXX only use (tp == NULL) ??? */ if (tp == NULL || !ISSET(tp->t_state, TS_ISOPEN | TS_WOPEN)) continue; line = &linesw[tp->t_line]; /* * XXX where do we _really_ need spltty(), if at all ??? */ s = spltty(); rxget = sc->sc_rxget; while (rxget != sc->sc_rxput) { u_char lsr; lsr = sc->sc_rxbuf[rxget]; rxget = (rxget + 1) & RBUFMASK; if (ISSET(lsr, LSR_RCV_MASK)) { if (ISSET(lsr, LSR_BI)) { #ifdef DDB if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { Debugger(); rxget = (rxget + 1) & RBUFMASK; continue; } #endif c = 0; } else c = sc->sc_rxbuf[rxget]; if (ISSET(lsr, LSR_OE)) { sc->sc_overflows++; if (sc->sc_errors++ == 0) timeout(comdiag, sc, 60 * hz); } rxget = (rxget + 1) & RBUFMASK; c |= lsrmap[(lsr & (LSR_BI|LSR_FE|LSR_PE)) >> 2]; line->l_rint(c, tp); } else if (ISSET(lsr, LSR_TXRDY)) { 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)); if (sc->sc_halt > 0) wakeup(&tp->t_outq); line->l_start(tp); } else if (lsr == 0) { u_char msr; msr = sc->sc_rxbuf[rxget]; rxget = (rxget + 1) & RBUFMASK; if (ISSET(msr, MSR_DDCD) && !ISSET(sc->sc_swflags, COM_SW_SOFTCAR)) { if (ISSET(msr, MSR_DCD)) line->l_modem(tp, 1); else if (line->l_modem(tp, 0) == 0) { CLR(sc->sc_mcr, sc->sc_dtr); bus_space_write_1(sc->sc_iot, sc->sc_ioh, com_mcr, sc->sc_mcr); } } if (ISSET(msr, MSR_DCTS) && ISSET(msr, MSR_CTS) && ISSET(tp->t_cflag, CRTSCTS)) line->l_start(tp); } } sc->sc_rxget = rxget; /* * XXX this is the place where we could unblock the input */ splx(s); } } int comintr(arg) void *arg; { struct com_softc *sc = arg; struct tty *tp = sc->sc_tty; bus_space_tag_t iot = sc->sc_iot; bus_space_handle_t ioh = sc->sc_ioh; u_char lsr; u_int rxput; if (ISSET(bus_space_read_1(iot, ioh, com_iir), IIR_NOPEND)) return (0); rxput = sc->sc_rxput; do { u_char msr, delta; for (;;) { lsr = bus_space_read_1(iot, ioh, com_lsr); if (!ISSET(lsr, LSR_RCV_MASK)) break; sc->sc_rxbuf[rxput] = lsr; rxput = (rxput + 1) & RBUFMASK; sc->sc_rxbuf[rxput] = bus_space_read_1(iot, ioh, com_data); rxput = (rxput + 1) & RBUFMASK; } msr = bus_space_read_1(iot, ioh, com_msr); delta = msr ^ sc->sc_msr; if (!ISSET(delta, MSR_DCD | MSR_CTS | MSR_RI | MSR_DSR)) continue; sc->sc_msr = msr; /* * stop output straight away if CTS drops and RTS/CTS flowcontrol is used * XXX what about DTR/DCD flowcontrol (ISSET(t_cflag, MDMBUF)) */ msr = (msr & 0xf0) | (delta >> 4); if (ISSET(tp->t_cflag, CRTSCTS) && ISSET(msr, MSR_DCTS)) { if (!ISSET(msr, MSR_CTS)) sc->sc_tbc = 0; } sc->sc_rxbuf[rxput] = 0; rxput = (rxput + 1) & RBUFMASK; sc->sc_rxbuf[rxput] = msr; rxput = (rxput + 1) & RBUFMASK; } while (!ISSET(bus_space_read_1(iot, ioh, com_iir), IIR_NOPEND)); if (ISSET(lsr, LSR_TXRDY)) { if (sc->sc_tbc > 0) { int n; n = sc->sc_fifolen; if (n > sc->sc_tbc) n = sc->sc_tbc; while (--n >= 0) { bus_space_write_1(iot, ioh, com_data, *sc->sc_tba++); --sc->sc_tbc; } } else if (ISSET(tp->t_state, TS_BUSY)) { sc->sc_rxbuf[rxput] = lsr; rxput = (rxput + 1) & RBUFMASK; } } if (sc->sc_rxput != rxput) { /* * XXX * This is the place to do input flow control by dropping RTS or DTR. * However, 115200 bps transfers get maxcc only up to 112 while there's * room for 512 so should we bother ? */ #ifdef PCCOM_DEBUG int cc; cc = rxput - sc->sc_rxget; if (cc < 0) cc += RBUFSIZE; if (cc > maxcc) maxcc = cc; #endif sc->sc_rxput = rxput; setsofttty(); } return 1; } /* * Following are all routines needed for PCCOM to act as console */ #include void comcnprobe(cp) struct consdev *cp; { /* XXX NEEDS TO BE FIXED XXX */ bus_space_tag_t iot = 0; bus_space_handle_t ioh; int found; if (bus_space_map(iot, CONADDR, COM_NPORTS, 0, &ioh)) { cp->cn_pri = CN_DEAD; return; } found = comprobe1(iot, ioh, CONADDR); bus_space_unmap(iot, ioh, COM_NPORTS); if (!found) { cp->cn_pri = CN_DEAD; return; } /* locate the major number */ for (commajor = 0; commajor < nchrdev; commajor++) if (cdevsw[commajor].d_open == comopen) break; /* initialize required fields */ cp->cn_dev = makedev(commajor, CONUNIT); #if defined(COMCONSOLE) || defined(PCCOMSONSOLE) cp->cn_pri = CN_REMOTE; /* Force a serial port console */ #else cp->cn_pri = CN_NORMAL; #endif } void comcninit(cp) struct consdev *cp; { #if 0 XXX NEEDS TO BE FIXED XXX comconsiot = ???; #endif if (bus_space_map(comconsiot, CONADDR, COM_NPORTS, 0, &comconsioh)) panic("comcninit: mapping failed"); cominit(comconsiot, comconsioh, comdefaultrate); comconsaddr = CONADDR; comconsinit = 0; } void cominit(iot, ioh, rate) bus_space_tag_t iot; bus_space_handle_t ioh; int rate; { int s = splhigh(); u_char stat; bus_space_write_1(iot, ioh, com_lcr, LCR_DLAB); rate = comspeed(comdefaultrate); bus_space_write_1(iot, ioh, com_dlbl, rate); bus_space_write_1(iot, ioh, com_dlbh, rate >> 8); bus_space_write_1(iot, ioh, com_lcr, LCR_8BITS); bus_space_write_1(iot, ioh, com_ier, IER_ERXRDY | IER_ETXRDY); bus_space_write_1(iot, ioh, com_fifo, FIFO_ENABLE | FIFO_RCV_RST | FIFO_XMT_RST | FIFO_TRIGGER_4); stat = bus_space_read_1(iot, ioh, com_iir); splx(s); } int comcngetc(dev) dev_t dev; { int s = splhigh(); bus_space_tag_t iot = comconsiot; bus_space_handle_t ioh = comconsioh; u_char stat, c; while (!ISSET(stat = bus_space_read_1(iot, ioh, com_lsr), LSR_RXRDY)) ; c = bus_space_read_1(iot, ioh, com_data); stat = bus_space_read_1(iot, ioh, com_iir); splx(s); return c; } /* * Console kernel output character routine. */ void comcnputc(dev, c) dev_t dev; int c; { int s = splhigh(); bus_space_tag_t iot = comconsiot; bus_space_handle_t ioh = comconsioh; u_char stat; register int timo; #ifdef KGDB if (dev != kgdb_dev) #endif if (comconsinit == 0) { cominit(iot, ioh, comdefaultrate); comconsinit = 1; } /* wait for any pending transmission to finish */ timo = 50000; while (!ISSET(stat = bus_space_read_1(iot, ioh, com_lsr), LSR_TXRDY) && --timo) ; bus_space_write_1(iot, ioh, com_data, c); /* wait for this transmission to complete */ timo = 1500000; while (!ISSET(stat = bus_space_read_1(iot, ioh, com_lsr), LSR_TXRDY) && --timo) ; /* clear any interrupts generated by this transmission */ stat = bus_space_read_1(iot, ioh, com_iir); splx(s); } void comcnpollc(dev, on) dev_t dev; int on; { }