/* $NetBSD: scif.c,v 1.70 2023/09/16 15:42:01 andvar Exp $ */ /*- * Copyright (C) 1999 T.Horiuchi and SAITOH Masanobu. 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. 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) 1998, 1999 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by 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. * * 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) 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 */ /* * SH internal serial driver * * This code is derived from both z8530tty.c and com.c */ #include __KERNEL_RCSID(0, "$NetBSD: scif.c,v 1.70 2023/09/16 15:42:01 andvar Exp $"); #include "opt_kgdb.h" #include "opt_scif.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "locators.h" struct scif_softc { device_t sc_dev; struct tty *sc_tty; void *sc_si; callout_t sc_diag_ch; #if 0 bus_space_tag_t sc_iot; /* ISA i/o space identifier */ bus_space_handle_t sc_ioh; /* ISA io handle */ int sc_drq; int sc_frequency; #endif u_int sc_overflows, sc_floods, sc_errors; /* number of retries so far */ u_char sc_status[7]; /* copy of registers */ int sc_hwflags; int sc_swflags; u_int sc_fifolen; u_int sc_r_hiwat, sc_r_lowat; u_char *volatile sc_rbget, *volatile sc_rbput; volatile u_int sc_rbavail; u_char *sc_rbuf, *sc_ebuf; u_char *sc_tba; /* transmit buffer address */ u_int sc_tbc, /* transmit byte count */ sc_heldtbc; volatile u_char sc_rx_flags, #define RX_TTY_BLOCKED 0x01 #define RX_TTY_OVERFLOWED 0x02 #define RX_IBUF_BLOCKED 0x04 #define RX_IBUF_OVERFLOWED 0x08 #define RX_ANY_BLOCK 0x0f sc_tx_busy, /* working on an output chunk */ sc_tx_done, /* done with one output chunk */ sc_tx_stopped, /* H/W level stop (lost CTS) */ sc_st_check, /* got a status interrupt */ sc_rx_ready; volatile u_char sc_heldchange; }; #ifdef SCIF_DEBUG int scif_debug = 1; #define DPRINTF(x) if (scif_debug) printf x #else #define DPRINTF(x) #endif static int scif_match(device_t, cfdata_t, void *); static void scif_attach(device_t, device_t, void *); CFATTACH_DECL_NEW(scif, sizeof(struct scif_softc), scif_match, scif_attach, NULL, NULL); static int scif_attached = 0; /* XXX: FIXME: don't limit to just one! */ extern struct cfdriver scif_cd; #define SCIFUNIT(x) TTUNIT(x) #define SCIFDIALOUT(x) TTDIALOUT(x) /* console */ dev_type_cnprobe(scifcnprobe); dev_type_cninit(scifcninit); dev_type_cngetc(scifcngetc); dev_type_cnputc(scifcnputc); /* cdevsw */ dev_type_open(scifopen); dev_type_close(scifclose); dev_type_read(scifread); dev_type_write(scifwrite); dev_type_ioctl(scifioctl); dev_type_stop(scifstop); dev_type_tty(sciftty); dev_type_poll(scifpoll); const struct cdevsw scif_cdevsw = { .d_open = scifopen, .d_close = scifclose, .d_read = scifread, .d_write = scifwrite, .d_ioctl = scifioctl, .d_stop = scifstop, .d_tty = sciftty, .d_poll = scifpoll, .d_mmap = nommap, .d_kqfilter = ttykqfilter, .d_discard = nodiscard, .d_flag = D_TTY }; #ifndef SCIFCONSOLE #define SCIFCONSOLE 0 #endif int scifconsole = SCIFCONSOLE; /* patchable */ /* struct tty */ static void scifstart(struct tty *); static int scifparam(struct tty *, struct termios *); void InitializeScif (unsigned int); int ScifErrCheck(void); void scif_putc(unsigned char); unsigned char scif_getc(void); static int scifintr(void *); static void scifsoft(void *); static void scif_rxsoft(struct scif_softc *, struct tty *); static void scif_txsoft(struct scif_softc *, struct tty *); #if 0 static void scif_stsoft(struct scif_softc *, struct tty *); #endif static void scif_schedrx(struct scif_softc *); static void scifdiag(void *); static void scif_break(struct scif_softc *, int); static void scif_iflush(struct scif_softc *); /* Hardware flag masks (sc_hwflags) */ #define SCIF_HW_NOIEN 0x01 #define SCIF_HW_FIFO 0x02 #define SCIF_HW_FLOW 0x08 #define SCIF_HW_DEV_OK 0x20 #define SCIF_HW_CONSOLE 0x40 #define SCIF_HW_KGDB 0x80 /* Buffer size for character buffer */ #define SCIF_RING_SIZE 2048 static unsigned int scif_rbuf_size = SCIF_RING_SIZE; /* Stop input when 3/4 of the ring is full; restart when only 1/4 is full. */ static unsigned int scif_rbuf_hiwat = (SCIF_RING_SIZE * 1) / 4; static unsigned int scif_rbuf_lowat = (SCIF_RING_SIZE * 3) / 4; #ifdef SCIFCN_SPEED unsigned int scifcn_speed = SCIFCN_SPEED; #else unsigned int scifcn_speed = 9600; #endif #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ int scifconscflag = CONMODE; static int scifisconsole = 0; #ifdef KGDB static int kgdb_attached = 0; #endif #define divrnd(n, q) (((n)*2/(q)+1)/2) /* divide and round off */ /* XXX: uwe * Prepare for bus_spacification. The difference in access widths is * still handled by the magic definitions in scifreg.h */ #define scif_smr_read() SHREG_SCSMR2 #define scif_smr_write(v) (SHREG_SCSMR2 = (v)) #define scif_brr_read() SHREG_SCBRR2 #define scif_brr_write(v) (SHREG_SCBRR2 = (v)) #define scif_scr_read() SHREG_SCSCR2 #define scif_scr_write(v) (SHREG_SCSCR2 = (v)) #define scif_ftdr_write(v) (SHREG_SCFTDR2 = (v)) #define scif_ssr_read() SHREG_SCSSR2 #define scif_ssr_write(v) (SHREG_SCSSR2 = (v)) #define scif_frdr_read() SHREG_SCFRDR2 #define scif_fcr_read() SHREG_SCFCR2 #define scif_fcr_write(v) (SHREG_SCFCR2 = (v)) #define scif_fdr_read() SHREG_SCFDR2 #ifdef SH4 /* additional registers in sh4 */ #define scif_sptr_read() SHREG_SCSPTR2 #define scif_sptr_write(v) (SHREG_SCSPTR2 = (v)) #define scif_lsr_read() SHREG_SCLSR2 #define scif_lsr_write(v) (SHREG_SCLSR2 = (v)) #endif /* SH4 */ void InitializeScif(unsigned int bps) { /* Initialize SCR */ scif_scr_write(0x00); #if 0 scif_fcr_write(SCFCR2_TFRST | SCFCR2_RFRST | SCFCR2_MCE); #else scif_fcr_write(SCFCR2_TFRST | SCFCR2_RFRST); #endif /* Serial Mode Register */ scif_smr_write(0x00); /* 8bit,NonParity,Even,1Stop */ /* Bit Rate Register */ scif_brr_write(divrnd(sh_clock_get_pclock(), 32 * bps) - 1); /* * wait 2m Sec, because Send/Recv must begin 1 bit period after * BRR is set. */ delay(2000); #if 0 scif_fcr_write(FIFO_RCV_TRIGGER_14 | FIFO_XMT_TRIGGER_1 | SCFCR2_MCE); #else scif_fcr_write(FIFO_RCV_TRIGGER_14 | FIFO_XMT_TRIGGER_1); #endif /* Send permission, Receive permission ON */ scif_scr_write(SCSCR2_TE | SCSCR2_RE); /* Serial Status Register */ scif_ssr_write(scif_ssr_read() & SCSSR2_TDFE); /* Clear Status */ } int ScifErrCheck(void) { return (scif_ssr_read() & (SCSSR2_ER | SCSSR2_FER | SCSSR2_PER)); } void scif_putc(unsigned char c) { /* wait for ready */ while ((scif_fdr_read() & SCFDR2_TXCNT) == SCFDR2_TXF_FULL) continue; /* write send data to send register */ scif_ftdr_write(c); /* clear ready flag */ scif_ssr_write(scif_ssr_read() & ~(SCSSR2_TDFE | SCSSR2_TEND)); } unsigned char scif_getc(void) { unsigned char c, err_c; #ifdef SH4 unsigned short err_c2 = 0; /* XXXGCC: -Wuninitialized */ #endif for (;;) { /* wait for ready */ while ((scif_fdr_read() & SCFDR2_RECVCNT) == 0) continue; c = scif_frdr_read(); err_c = scif_ssr_read(); scif_ssr_write(scif_ssr_read() & ~(SCSSR2_ER | SCSSR2_BRK | SCSSR2_RDF | SCSSR2_DR)); #ifdef SH4 if (CPU_IS_SH4) { err_c2 = scif_lsr_read(); scif_lsr_write(scif_lsr_read() & ~SCLSR2_ORER); } #endif if ((err_c & (SCSSR2_ER | SCSSR2_BRK | SCSSR2_FER | SCSSR2_PER)) == 0) { #ifdef SH4 if (CPU_IS_SH4 && ((err_c2 & SCLSR2_ORER) == 0)) #endif return(c); } } } static int scif_match(device_t parent, cfdata_t cfp, void *aux) { if (scif_attached) return 0; if (strcmp(cfp->cf_name, "scif") != 0) return 0; return 1; } static void scif_attach(device_t parent, device_t self, void *aux) { struct scif_softc *sc; struct tty *tp; sc = device_private(self); sc->sc_dev = self; scif_attached = 1; sc->sc_hwflags = 0; /* XXX */ sc->sc_swflags = 0; /* XXX */ sc->sc_fifolen = 16; aprint_normal("\n"); if (scifisconsole) { aprint_naive(" (console)\n"); aprint_normal_dev(self, "console\n"); SET(sc->sc_hwflags, SCIF_HW_CONSOLE); SET(sc->sc_swflags, TIOCFLAG_SOFTCAR); } #ifdef KGDB else if (kgdb_attached) { aprint_naive(" (kgdb)\n"); aprint_normal_dev(self, "kgdb\n"); SET(sc->sc_hwflags, SCIF_HW_KGDB); SET(sc->sc_swflags, TIOCFLAG_SOFTCAR); } #endif else { aprint_naive("\n"); InitializeScif(9600); /* XXX */ } callout_init(&sc->sc_diag_ch, 0); #ifdef SH4 intc_intr_establish(SH4_INTEVT_SCIF_ERI, IST_LEVEL, IPL_SERIAL, scifintr, sc); intc_intr_establish(SH4_INTEVT_SCIF_RXI, IST_LEVEL, IPL_SERIAL, scifintr, sc); intc_intr_establish(SH4_INTEVT_SCIF_BRI, IST_LEVEL, IPL_SERIAL, scifintr, sc); intc_intr_establish(SH4_INTEVT_SCIF_TXI, IST_LEVEL, IPL_SERIAL, scifintr, sc); #else intc_intr_establish(SH7709_INTEVT2_SCIF_ERI, IST_LEVEL, IPL_SERIAL, scifintr, sc); intc_intr_establish(SH7709_INTEVT2_SCIF_RXI, IST_LEVEL, IPL_SERIAL, scifintr, sc); intc_intr_establish(SH7709_INTEVT2_SCIF_BRI, IST_LEVEL, IPL_SERIAL, scifintr, sc); intc_intr_establish(SH7709_INTEVT2_SCIF_TXI, IST_LEVEL, IPL_SERIAL, scifintr, sc); #endif sc->sc_si = softint_establish(SOFTINT_SERIAL, scifsoft, sc); SET(sc->sc_hwflags, SCIF_HW_DEV_OK); tp = tty_alloc(); tp->t_oproc = scifstart; tp->t_param = scifparam; tp->t_hwiflow = NULL; sc->sc_tty = tp; sc->sc_rbuf = kmem_alloc(scif_rbuf_size << 1, KM_SLEEP); sc->sc_ebuf = sc->sc_rbuf + (scif_rbuf_size << 1); tty_attach(tp); /* XXX: TODO */ if (!pmf_device_register(self, NULL, NULL)) aprint_error_dev(self, "unable to establish power handler\n"); } /* * Start or restart transmission. */ static void scifstart(struct tty *tp) { struct scif_softc *sc; int s; sc = device_lookup_private(&scif_cd, SCIFUNIT(tp->t_dev)); s = spltty(); if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) goto out; if (sc->sc_tx_stopped) goto out; if (!ttypull(tp)) goto out; /* 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. */ scif_scr_write(scif_scr_read() | SCSCR2_TIE | SCSCR2_RIE); /* Output the first chunk of the contiguous buffer. */ { int n; int maxchars; int i; n = sc->sc_tbc; maxchars = sc->sc_fifolen - ((scif_fdr_read() & SCFDR2_TXCNT) >> 8); if (n > maxchars) n = maxchars; for (i = 0; i < n; i++) { scif_putc(*(sc->sc_tba)); sc->sc_tba++; } sc->sc_tbc -= n; } out: splx(s); return; } /* * Set SCIF tty parameters from termios. * XXX - Should just copy the whole termios after * making sure all the changes could be done. */ static int scifparam(struct tty *tp, struct termios *t) { struct scif_softc *sc; int ospeed = t->c_ospeed; int s; sc = device_lookup_private(&scif_cd, SCIFUNIT(tp->t_dev)); if (!device_is_active(sc->sc_dev)) return (EIO); /* Check requested parameters. */ if (ospeed < 0) return (EINVAL); if (t->c_ispeed && t->c_ispeed != t->c_ospeed) return (EINVAL); /* * 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, SCIF_HW_CONSOLE)) { SET(t->c_cflag, CLOCAL); CLR(t->c_cflag, HUPCL); } /* * If there were no changes, don't do anything. This avoids dropping * input and improves performance when all we did was frob things like * VMIN and VTIME. */ if (tp->t_ospeed == t->c_ospeed && tp->t_cflag == t->c_cflag) return (0); #if 0 /* XXX (msaitoh) */ lcr = ISSET(sc->sc_lcr, LCR_SBREAK) | cflag2lcr(t->c_cflag); #endif s = splserial(); /* * Set the flow control pins depending on the current flow control * mode. */ if (ISSET(t->c_cflag, CRTSCTS)) { scif_fcr_write(scif_fcr_read() | SCFCR2_MCE); } else { scif_fcr_write(scif_fcr_read() & ~SCFCR2_MCE); } scif_brr_write(divrnd(sh_clock_get_pclock(), 32 * ospeed) -1); /* * Set the FIFO threshold based on the receive speed. * * * If it's a low speed, it's probably a mouse or some other * interactive device, so set the threshold low. * * If it's a high speed, trim the trigger level down to prevent * overflows. * * Otherwise set it a bit higher. */ #if 0 /* XXX (msaitoh) */ if (ISSET(sc->sc_hwflags, SCIF_HW_HAYESP)) sc->sc_fifo = FIFO_DMA_MODE | FIFO_ENABLE | FIFO_TRIGGER_8; else if (ISSET(sc->sc_hwflags, SCIF_HW_FIFO)) sc->sc_fifo = FIFO_ENABLE | (t->c_ospeed <= 1200 ? FIFO_TRIGGER_1 : t->c_ospeed <= 38400 ? FIFO_TRIGGER_8 : FIFO_TRIGGER_4); else sc->sc_fifo = 0; #endif /* 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; } #if 0 /* XXX (msaitoh) */ else scif_loadchannelregs(sc); #endif } if (!ISSET(t->c_cflag, CHWFLOW)) { /* Disable the high water mark. */ sc->sc_r_hiwat = 0; sc->sc_r_lowat = 0; if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); scif_schedrx(sc); } } else { sc->sc_r_hiwat = scif_rbuf_hiwat; sc->sc_r_lowat = scif_rbuf_lowat; } splx(s); DPRINTF(("%s: scifparam\n", device_xname(sc->sc_dev))); if (!ISSET(t->c_cflag, CHWFLOW)) { if (sc->sc_tx_stopped) { sc->sc_tx_stopped = 0; scifstart(tp); } } return (0); } static void scif_iflush(struct scif_softc *sc) { int i; i = scif_fdr_read() & SCFDR2_RECVCNT; while (i > 0) { (void)scif_frdr_read(); scif_ssr_write(scif_ssr_read() & ~(SCSSR2_RDF | SCSSR2_DR)); i--; } } int scifopen(dev_t dev, int flag, int mode, struct lwp *l) { struct scif_softc *sc; struct tty *tp; int s, s2; int error; sc = device_lookup_private(&scif_cd, SCIFUNIT(dev)); if (sc == 0 || !ISSET(sc->sc_hwflags, SCIF_HW_DEV_OK) || sc->sc_rbuf == NULL) return (ENXIO); if (!device_is_active(sc->sc_dev)) return (ENXIO); #ifdef KGDB /* * If this is the kgdb port, no other use is permitted. */ if (ISSET(sc->sc_hwflags, SCIF_HW_KGDB)) return (EBUSY); #endif /* KGDB */ tp = sc->sc_tty; if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp)) return (EBUSY); s = spltty(); /* * Do the following iff this is a first open. */ if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { struct termios t; tp->t_dev = dev; s2 = splserial(); /* Turn on interrupts. */ scif_scr_write(scif_scr_read() | SCSCR2_TIE | SCSCR2_RIE); splx(s2); /* * Initialize the termios status to the defaults. Add in the * sticky bits from TIOCSFLAGS. */ t.c_ispeed = 0; if (ISSET(sc->sc_hwflags, SCIF_HW_CONSOLE)) { t.c_ospeed = scifcn_speed; /* XXX (msaitoh) */ t.c_cflag = scifconscflag; } 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); /* Make sure scifparam() will do something. */ tp->t_ospeed = 0; (void) scifparam(tp, &t); tp->t_iflag = TTYDEF_IFLAG; tp->t_oflag = TTYDEF_OFLAG; tp->t_lflag = TTYDEF_LFLAG; ttychars(tp); ttsetwater(tp); s2 = splserial(); /* Clear the input ring, and unblock. */ sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; sc->sc_rbavail = scif_rbuf_size; scif_iflush(sc); CLR(sc->sc_rx_flags, RX_ANY_BLOCK); #if 0 /* XXX (msaitoh) */ scif_hwiflow(sc); #endif DPRINTF(("%s: scifopen\n", device_xname(sc->sc_dev))); splx(s2); } splx(s); error = ttyopen(tp, SCIFDIALOUT(dev), ISSET(flag, O_NONBLOCK)); if (error) goto bad; error = (*tp->t_linesw->l_open)(dev, tp); if (error) goto bad; return (0); bad: return (error); } int scifclose(dev_t dev, int flag, int mode, struct lwp *l) { struct scif_softc *sc; struct tty *tp; sc = device_lookup_private(&scif_cd, SCIFUNIT(dev)); 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 (!device_is_active(sc->sc_dev)) return (0); return (0); } int scifread(dev_t dev, struct uio *uio, int flag) { struct scif_softc *sc; struct tty *tp; sc = device_lookup_private(&scif_cd, SCIFUNIT(dev)); tp = sc->sc_tty; return ((*tp->t_linesw->l_read)(tp, uio, flag)); } int scifwrite(dev_t dev, struct uio *uio, int flag) { struct scif_softc *sc; struct tty *tp; sc = device_lookup_private(&scif_cd, SCIFUNIT(dev)); tp = sc->sc_tty; return ((*tp->t_linesw->l_write)(tp, uio, flag)); } int scifpoll(dev_t dev, int events, struct lwp *l) { struct scif_softc *sc; struct tty *tp; sc = device_lookup_private(&scif_cd, SCIFUNIT(dev)); tp = sc->sc_tty; return ((*tp->t_linesw->l_poll)(tp, events, l)); } struct tty * sciftty(dev_t dev) { struct scif_softc *sc; struct tty *tp; sc = device_lookup_private(&scif_cd, SCIFUNIT(dev)); tp = sc->sc_tty; return (tp); } int scifioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) { struct scif_softc *sc; struct tty *tp; int error; int s; sc = device_lookup_private(&scif_cd, SCIFUNIT(dev)); if (!device_is_active(sc->sc_dev)) return (EIO); tp = sc->sc_tty; 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); error = 0; s = splserial(); switch (cmd) { case TIOCSBRK: scif_break(sc, 1); break; case TIOCCBRK: scif_break(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) break; sc->sc_swflags = *(int *)data; break; default: error = EPASSTHROUGH; break; } splx(s); return (error); } static void scif_schedrx(struct scif_softc *sc) { sc->sc_rx_ready = 1; /* Wake up the poller. */ softint_schedule(sc->sc_si); } static void scif_break(struct scif_softc *sc, int onoff) { if (onoff) scif_ssr_write(scif_ssr_read() & ~SCSSR2_TDFE); else scif_ssr_write(scif_ssr_read() | SCSSR2_TDFE); #if 0 /* XXX */ if (!sc->sc_heldchange) { if (sc->sc_tx_busy) { sc->sc_heldtbc = sc->sc_tbc; sc->sc_tbc = 0; sc->sc_heldchange = 1; } else scif_loadchannelregs(sc); } #endif } /* * Stop output, e.g., for ^S or output flush. */ void scifstop(struct tty *tp, int flag) { struct scif_softc *sc; int s; sc = device_lookup_private(&scif_cd, SCIFUNIT(tp->t_dev)); 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); } static void scifdiag(void *arg) { struct scif_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", device_xname(sc->sc_dev), overflows, overflows == 1 ? "" : "s", floods, floods == 1 ? "" : "s"); } static void scif_rxsoft(struct scif_softc *sc, struct tty *tp) { int (*rint)(int, struct tty *) = tp->t_linesw->l_rint; u_char *get, *end; u_int cc, scc; u_char ssr2; int code; int s; end = sc->sc_ebuf; get = sc->sc_rbget; scc = cc = scif_rbuf_size - sc->sc_rbavail; if (cc == scif_rbuf_size) { sc->sc_floods++; if (sc->sc_errors++ == 0) callout_reset(&sc->sc_diag_ch, 60 * hz, scifdiag, sc); } while (cc) { code = get[0]; ssr2 = get[1]; if (ISSET(ssr2, SCSSR2_BRK | SCSSR2_FER | SCSSR2_PER)) { if (ISSET(ssr2, SCSSR2_BRK | SCSSR2_FER)) SET(code, TTY_FE); if (ISSET(ssr2, SCSSR2_PER)) SET(code, TTY_PE); } if ((*rint)(code, tp) == -1) { /* * The line discipline's buffer is out of space. */ if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { /* * We're either not using flow control, or the * line discipline didn't tell us to block for * some reason. Either way, we have no way to * know when there's more space available, so * just drop the rest of the data. */ get += cc << 1; if (get >= end) get -= scif_rbuf_size << 1; cc = 0; } else { /* * Don't schedule any more receive processing * until the line discipline tells us there's * space available (through scifhwiflow()). * Leave the rest of the data in the input * buffer. */ SET(sc->sc_rx_flags, RX_TTY_OVERFLOWED); } break; } get += 2; if (get >= end) get = sc->sc_rbuf; cc--; } if (cc != scc) { sc->sc_rbget = get; s = splserial(); cc = sc->sc_rbavail += scc - cc; /* Buffers should be ok again, release possible block. */ if (cc >= sc->sc_r_lowat) { if (ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { CLR(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); scif_scr_write(scif_scr_read() | SCSCR2_RIE); } #if 0 if (ISSET(sc->sc_rx_flags, RX_IBUF_BLOCKED)) { CLR(sc->sc_rx_flags, RX_IBUF_BLOCKED); scif_hwiflow(sc); } #endif } splx(s); } } static void scif_txsoft(struct scif_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); } #if 0 /* XXX (msaitoh) */ static void scif_stsoft(struct scif_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) (*tp->t_linesw->l_modem)(tp, ISSET(msr, MSR_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; } } DPRINTF(("%s: scif_stsoft\n", device_xname(sc->sc_dev))); } #endif /* 0 */ static void scifsoft(void *arg) { struct scif_softc *sc = arg; struct tty *tp; if (!device_is_active(sc->sc_dev)) return; tp = sc->sc_tty; if (sc->sc_rx_ready) { sc->sc_rx_ready = 0; scif_rxsoft(sc, tp); } #if 0 if (sc->sc_st_check) { sc->sc_st_check = 0; scif_stsoft(sc, tp); } #endif if (sc->sc_tx_done) { sc->sc_tx_done = 0; scif_txsoft(sc, tp); } } static int scifintr(void *arg) { struct scif_softc *sc = arg; u_char *put, *end; u_int cc; u_short ssr2; int count; if (!device_is_active(sc->sc_dev)) return (0); end = sc->sc_ebuf; put = sc->sc_rbput; cc = sc->sc_rbavail; do { ssr2 = scif_ssr_read(); if (ISSET(ssr2, SCSSR2_BRK)) { scif_ssr_write(scif_ssr_read() & ~(SCSSR2_ER | SCSSR2_BRK | SCSSR2_DR)); #ifdef DDB if (ISSET(sc->sc_hwflags, SCIF_HW_CONSOLE)) { console_debugger(); } #endif /* DDB */ #ifdef KGDB if (ISSET(sc->sc_hwflags, SCIF_HW_KGDB)) { kgdb_connect(1); } #endif /* KGDB */ } count = scif_fdr_read() & SCFDR2_RECVCNT; if (count != 0) { for (;;) { u_char c = scif_frdr_read(); u_char err = (u_char)(scif_ssr_read() & 0x00ff); scif_ssr_write(scif_ssr_read() & ~(SCSSR2_ER | SCSSR2_RDF | SCSSR2_DR)); #ifdef SH4 if (CPU_IS_SH4) scif_lsr_write(scif_lsr_read() & ~SCLSR2_ORER); #endif if ((cc > 0) && (count > 0)) { put[0] = c; put[1] = err; put += 2; if (put >= end) put = sc->sc_rbuf; cc--; count--; } else break; } /* * Current string of incoming characters ended because * no more data was available or we ran out of space. * Schedule a receive event if any data was received. * If we're out of space, turn off receive interrupts. */ sc->sc_rbput = put; sc->sc_rbavail = cc; if (!ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) 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 (!ISSET(sc->sc_rx_flags, RX_IBUF_BLOCKED) && cc < sc->sc_r_hiwat) { SET(sc->sc_rx_flags, RX_IBUF_BLOCKED); #if 0 scif_hwiflow(sc); #endif } /* * If we're out of space, disable receive interrupts * until the queue has drained a bit. */ if (!cc) { SET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); scif_scr_write(scif_scr_read() & ~SCSCR2_RIE); } } else { if (scif_ssr_read() & (SCSSR2_RDF | SCSSR2_DR)) { scif_scr_write(scif_scr_read() & ~(SCSCR2_TIE | SCSCR2_RIE)); delay(10); scif_scr_write(scif_scr_read() | SCSCR2_TIE | SCSCR2_RIE); continue; } } } while (scif_ssr_read() & (SCSSR2_RDF | SCSSR2_DR)); #if 0 msr = bus_space_read_1(iot, ioh, scif_msr); delta = msr ^ sc->sc_msr; sc->sc_msr = msr; if (ISSET(delta, sc->sc_msr_mask)) { SET(sc->sc_msr_delta, delta); /* * Pulse-per-second clock signal on edge of DCD? */ if (ISSET(delta, sc->sc_ppsmask)) { struct timeval tv; if (ISSET(msr, sc->sc_ppsmask) == sc->sc_ppsassert) { /* XXX nanotime() */ microtime(&tv); TIMEVAL_TO_TIMESPEC(&tv, &sc->ppsinfo.assert_timestamp); if (sc->ppsparam.mode & PPS_OFFSETASSERT) { timespecadd(&sc->ppsinfo.assert_timestamp, &sc->ppsparam.assert_offset, &sc->ppsinfo.assert_timestamp); TIMESPEC_TO_TIMEVAL(&tv, &sc->ppsinfo.assert_timestamp); } #ifdef PPS_SYNC if (sc->ppsparam.mode & PPS_HARDPPSONASSERT) hardpps(&tv, tv.tv_usec); #endif sc->ppsinfo.assert_sequence++; sc->ppsinfo.current_mode = sc->ppsparam.mode; } else if (ISSET(msr, sc->sc_ppsmask) == sc->sc_ppsclear) { /* XXX nanotime() */ microtime(&tv); TIMEVAL_TO_TIMESPEC(&tv, &sc->ppsinfo.clear_timestamp); if (sc->ppsparam.mode & PPS_OFFSETCLEAR) { timespecadd(&sc->ppsinfo.clear_timestamp, &sc->ppsparam.clear_offset, &sc->ppsinfo.clear_timestamp); TIMESPEC_TO_TIMEVAL(&tv, &sc->ppsinfo.clear_timestamp); } #ifdef PPS_SYNC if (sc->ppsparam.mode & PPS_HARDPPSONCLEAR) hardpps(&tv, tv.tv_usec); #endif sc->ppsinfo.clear_sequence++; sc->ppsinfo.current_mode = sc->ppsparam.mode; } } /* * 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; DPRINTF(("%s: scifintr\n", device_xname(sc->sc_dev))); } sc->sc_st_check = 1; } #endif /* * 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. */ if (((scif_fdr_read() & SCFDR2_TXCNT) >> 8) != 16) { /* XXX (msaitoh) */ /* * If we've delayed a parameter change, do it now, and restart * output. */ if (sc->sc_heldchange) { sc->sc_heldchange = 0; sc->sc_tbc = sc->sc_heldtbc; sc->sc_heldtbc = 0; } /* Output the next chunk of the contiguous buffer, if any. */ if (sc->sc_tbc > 0) { int n; int maxchars; int i; n = sc->sc_tbc; maxchars = sc->sc_fifolen - ((scif_fdr_read() & SCFDR2_TXCNT) >> 8); if (n > maxchars) n = maxchars; for (i = 0; i < n; i++) { scif_putc(*(sc->sc_tba)); sc->sc_tba++; } sc->sc_tbc -= n; } else { /* Disable transmit completion interrupts if necessary. */ #if 0 if (ISSET(sc->sc_ier, IER_ETXRDY)) #endif scif_scr_write(scif_scr_read() & ~SCSCR2_TIE); if (sc->sc_tx_busy) { sc->sc_tx_busy = 0; sc->sc_tx_done = 1; } } } /* Wake up the poller. */ softint_schedule(sc->sc_si); #ifdef RND_SCIF rnd_add_uint32(&sc->rnd_source, iir | lsr); #endif return (1); } void scifcnprobe(struct consdev *cp) { int maj; /* locate the major number */ maj = cdevsw_lookup_major(&scif_cdevsw); /* Initialize required fields. */ cp->cn_dev = makedev(maj, 0); if (scifconsole) cp->cn_pri = CN_REMOTE; else cp->cn_pri = CN_NORMAL; } void scifcninit(struct consdev *cp) { InitializeScif(scifcn_speed); scifisconsole = 1; } int scifcngetc(dev_t dev) { int c; int s; s = splserial(); c = scif_getc(); splx(s); return (c); } void scifcnputc(dev_t dev, int c) { int s; s = splserial(); scif_putc((u_char)c); splx(s); } #ifdef KGDB int scif_kgdb_init(void) { if (strcmp(kgdb_devname, "scif") != 0) return (1); if (scifisconsole) return (1); /* can't share with console */ InitializeScif(kgdb_rate); kgdb_attach((int (*)(void *))scifcngetc, (void (*)(void *, int))scifcnputc, NULL); kgdb_dev = 123; /* unneeded, only to satisfy some tests */ kgdb_attached = 1; return (0); } #endif /* KGDB */