/* $OpenBSD: nhpib.c,v 1.15 2005/01/15 21:13:08 miod Exp $ */ /* $NetBSD: nhpib.c,v 1.17 1997/05/05 21:06:41 thorpej Exp $ */ /* * Copyright (c) 1996, 1997 Jason R. Thorpe. All rights reserved. * Copyright (c) 1982, 1990, 1993 * 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. * * @(#)nhpib.c 8.2 (Berkeley) 1/12/94 */ /* * Internal/98624 HPIB driver */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* * ODD parity table for listen and talk addresses and secondary commands. * The TI9914A doesn't produce the parity bit. */ static u_char listnr_par[] = { 0040,0241,0242,0043,0244,0045,0046,0247, 0250,0051,0052,0253,0054,0255,0256,0057, 0260,0061,0062,0263,0064,0265,0266,0067, 0070,0271,0272,0073,0274,0075,0076,0277, }; static u_char talker_par[] = { 0100,0301,0302,0103,0304,0105,0106,0307, 0310,0111,0112,0313,0114,0315,0316,0117, 0320,0121,0122,0323,0124,0325,0326,0127, 0130,0331,0332,0133,0334,0135,0136,0337, }; static u_char sec_par[] = { 0340,0141,0142,0343,0144,0345,0346,0147, 0150,0351,0352,0153,0354,0155,0156,0357, 0160,0361,0362,0163,0364,0165,0166,0367, 0370,0171,0172,0373,0174,0375,0376,0177 }; void nhpibifc(struct nhpibdevice *); void nhpibreadtimo(void *); int nhpibwait(struct nhpibdevice *, int); void nhpibreset(struct hpibbus_softc *); int nhpibsend(struct hpibbus_softc *, int, int, void *, int); int nhpibrecv(struct hpibbus_softc *, int, int, void *, int); int nhpibppoll(struct hpibbus_softc *); void nhpibppwatch(void *); void nhpibgo(struct hpibbus_softc *, int, int, void *, int, int, int); void nhpibdone(struct hpibbus_softc *); int nhpibintr(void *); /* * Our controller ops structure. */ struct hpib_controller nhpib_controller = { nhpibreset, nhpibsend, nhpibrecv, nhpibppoll, nhpibppwatch, nhpibgo, nhpibdone, nhpibintr }; struct nhpib_softc { struct device sc_dev; /* generic device glue */ struct isr sc_isr; struct nhpibdevice *sc_regs; /* device registers */ struct hpibbus_softc *sc_hpibbus; /* XXX */ struct timeout sc_read_to; /* nhpibreadtimo timeout */ struct timeout sc_watch_to; /* nhpibppwatch timeout */ }; int nhpibmatch(struct device *, void *, void *); void nhpibattach(struct device *, struct device *, void *); struct cfattach nhpib_ca = { sizeof(struct nhpib_softc), nhpibmatch, nhpibattach }; struct cfdriver nhpib_cd = { NULL, "nhpib", DV_DULL }; int nhpibmatch(parent, match, aux) struct device *parent; void *match, *aux; { struct dio_attach_args *da = aux; /* * Internal HP-IB doesn't always return a device ID, * so we rely on the sysflags. */ if (da->da_scode == 7 && internalhpib) return (1); if (da->da_id == DIO_DEVICE_ID_NHPIB) return (1); return (0); } void nhpibattach(parent, self, aux) struct device *parent, *self; void *aux; { struct nhpib_softc *sc = (struct nhpib_softc *)self; struct dio_attach_args *da = aux; struct hpibdev_attach_args ha; const char *desc; int ipl, type = HPIBA; sc->sc_regs = (struct nhpibdevice *)iomap(dio_scodetopa(da->da_scode), da->da_size); if (sc->sc_regs == NULL) { printf("\n%s: can't map registers\n", self->dv_xname); return; } ipl = DIO_IPL(sc->sc_regs); if (da->da_scode == 7 && internalhpib) desc = DIO_DEVICE_DESC_IHPIB; else if (da->da_id == DIO_DEVICE_ID_NHPIB) { type = HPIBB; desc = DIO_DEVICE_DESC_NHPIB; } else desc = "unknown HP-IB!"; printf(" ipl %d: %s\n", ipl, desc); /* Establish the interrupt handler. */ sc->sc_isr.isr_func = nhpibintr; sc->sc_isr.isr_arg = sc; sc->sc_isr.isr_ipl = ipl; sc->sc_isr.isr_priority = IPL_BIO; dio_intr_establish(&sc->sc_isr, self->dv_xname); /* Initialize timeout structures */ timeout_set(&sc->sc_read_to, nhpibreadtimo, &sc->sc_hpibbus); timeout_set(&sc->sc_watch_to, nhpibppwatch, &sc->sc_hpibbus); ha.ha_ops = &nhpib_controller; ha.ha_type = type; /* XXX */ ha.ha_ba = (type == HPIBA) ? HPIBA_BA : (sc->sc_regs->hpib_csa & CSA_BA); ha.ha_softcpp = &sc->sc_hpibbus; /* XXX */ (void)config_found(self, &ha, hpibdevprint); } void nhpibreset(hs) struct hpibbus_softc *hs; { struct nhpib_softc *sc = (struct nhpib_softc *)hs->sc_dev.dv_parent; struct nhpibdevice *hd = sc->sc_regs; hd->hpib_acr = AUX_SSWRST; hd->hpib_ar = hs->sc_ba; hd->hpib_lim = LIS_ERR; hd->hpib_mim = 0; hd->hpib_acr = AUX_CDAI; hd->hpib_acr = AUX_CSHDW; hd->hpib_acr = AUX_SSTD1; hd->hpib_acr = AUX_SVSTD1; hd->hpib_acr = AUX_CPP; hd->hpib_acr = AUX_CHDFA; hd->hpib_acr = AUX_CHDFE; hd->hpib_acr = AUX_RHDF; hd->hpib_acr = AUX_CSWRST; nhpibifc(hd); hd->hpib_ie = IDS_IE; hd->hpib_data = C_DCL_P; DELAY(100000); } void nhpibifc(hd) struct nhpibdevice *hd; { hd->hpib_acr = AUX_TCA; hd->hpib_acr = AUX_CSRE; hd->hpib_acr = AUX_SSIC; DELAY(100); hd->hpib_acr = AUX_CSIC; hd->hpib_acr = AUX_SSRE; } int nhpibsend(hs, slave, sec, ptr, origcnt) struct hpibbus_softc *hs; int slave, sec, origcnt; void *ptr; { struct nhpib_softc *sc = (struct nhpib_softc *)hs->sc_dev.dv_parent; struct nhpibdevice *hd = sc->sc_regs; int cnt = origcnt; char *addr = ptr; hd->hpib_acr = AUX_TCA; hd->hpib_data = C_UNL_P; if (nhpibwait(hd, MIS_BO)) goto senderror; hd->hpib_data = talker_par[hs->sc_ba]; hd->hpib_acr = AUX_STON; if (nhpibwait(hd, MIS_BO)) goto senderror; hd->hpib_data = listnr_par[slave]; if (nhpibwait(hd, MIS_BO)) goto senderror; if (sec >= 0 || sec == -2) { if (sec == -2) /* selected device clear KLUDGE */ hd->hpib_data = C_SDC_P; else hd->hpib_data = sec_par[sec]; if (nhpibwait(hd, MIS_BO)) goto senderror; } hd->hpib_acr = AUX_GTS; if (cnt) { while (--cnt > 0) { hd->hpib_data = *addr++; if (nhpibwait(hd, MIS_BO)) goto senderror; } hd->hpib_acr = AUX_EOI; hd->hpib_data = *addr; if (nhpibwait(hd, MIS_BO)) goto senderror; hd->hpib_acr = AUX_TCA; #if 0 /* * May be causing 345 disks to hang due to interference * with PPOLL mechanism. */ hd->hpib_data = C_UNL_P; (void) nhpibwait(hd, MIS_BO); #endif } return(origcnt); senderror: nhpibifc(hd); return(origcnt - cnt - 1); } int nhpibrecv(hs, slave, sec, ptr, origcnt) struct hpibbus_softc *hs; int slave, sec, origcnt; void *ptr; { struct nhpib_softc *sc = (struct nhpib_softc *)hs->sc_dev.dv_parent; struct nhpibdevice *hd = sc->sc_regs; int cnt = origcnt; char *addr = ptr; /* * Slave < 0 implies continuation of a previous receive * that probably timed out. */ if (slave >= 0) { hd->hpib_acr = AUX_TCA; hd->hpib_data = C_UNL_P; if (nhpibwait(hd, MIS_BO)) goto recverror; hd->hpib_data = listnr_par[hs->sc_ba]; hd->hpib_acr = AUX_SLON; if (nhpibwait(hd, MIS_BO)) goto recverror; hd->hpib_data = talker_par[slave]; if (nhpibwait(hd, MIS_BO)) goto recverror; if (sec >= 0) { hd->hpib_data = sec_par[sec]; if (nhpibwait(hd, MIS_BO)) goto recverror; } hd->hpib_acr = AUX_RHDF; hd->hpib_acr = AUX_GTS; } if (cnt) { while (--cnt >= 0) { if (nhpibwait(hd, MIS_BI)) goto recvbyteserror; *addr++ = hd->hpib_data; } hd->hpib_acr = AUX_TCA; hd->hpib_data = (slave == 31) ? C_UNA_P : C_UNT_P; (void) nhpibwait(hd, MIS_BO); } return(origcnt); recverror: nhpibifc(hd); recvbyteserror: return(origcnt - cnt - 1); } void nhpibgo(hs, slave, sec, ptr, count, rw, timo) struct hpibbus_softc *hs; int slave, sec, count, rw, timo; void *ptr; { struct nhpib_softc *sc = (struct nhpib_softc *)hs->sc_dev.dv_parent; struct nhpibdevice *hd = sc->sc_regs; char *addr = ptr; hs->sc_flags |= HPIBF_IO; if (timo) hs->sc_flags |= HPIBF_TIMO; if (rw == B_READ) hs->sc_flags |= HPIBF_READ; #ifdef DEBUG else if (hs->sc_flags & HPIBF_READ) { printf("nhpibgo: HPIBF_READ still set\n"); hs->sc_flags &= ~HPIBF_READ; } #endif hs->sc_count = count; hs->sc_addr = addr; if (hs->sc_flags & HPIBF_READ) { hs->sc_curcnt = count; dmago(hs->sc_dq->dq_chan, addr, count, DMAGO_BYTE|DMAGO_READ); nhpibrecv(hs, slave, sec, 0, 0); hd->hpib_mim = MIS_END; } else { hd->hpib_mim = 0; if (count < hpibdmathresh) { hs->sc_curcnt = count; nhpibsend(hs, slave, sec, addr, count); nhpibdone(hs); return; } hs->sc_curcnt = --count; dmago(hs->sc_dq->dq_chan, addr, count, DMAGO_BYTE); nhpibsend(hs, slave, sec, 0, 0); } hd->hpib_ie = IDS_IE | IDS_DMA(hs->sc_dq->dq_chan); } /* * This timeout can only happen if a DMA read finishes DMAing with the read * still pending (more data in read transaction than the driver was prepared * to accept). At the moment, variable-record tape drives are the only things * capabale of doing this. We repeat the necessary code from nhpibintr() - * easier and quicker than calling nhpibintr() for this special case. */ void nhpibreadtimo(arg) void *arg; { struct hpibbus_softc *hs = arg; struct nhpib_softc *sc = (struct nhpib_softc *)hs->sc_dev.dv_parent; int s = splbio(); if (hs->sc_flags & HPIBF_IO) { struct nhpibdevice *hd = sc->sc_regs; struct hpibqueue *hq; hd->hpib_mim = 0; hd->hpib_acr = AUX_TCA; hs->sc_flags &= ~(HPIBF_DONE|HPIBF_IO|HPIBF_READ|HPIBF_TIMO); dmafree(hs->sc_dq); hq = TAILQ_FIRST(&hs->sc_queue); (hq->hq_intr)(hq->hq_softc); } splx(s); } void nhpibdone(hs) struct hpibbus_softc *hs; { struct nhpib_softc *sc = (struct nhpib_softc *)hs->sc_dev.dv_parent; struct nhpibdevice *hd = sc->sc_regs; int cnt; cnt = hs->sc_curcnt; hs->sc_addr += cnt; hs->sc_count -= cnt; hs->sc_flags |= HPIBF_DONE; hd->hpib_ie = IDS_IE; if (hs->sc_flags & HPIBF_READ) { if ((hs->sc_flags & HPIBF_TIMO) && (hd->hpib_ids & IDS_IR) == 0) timeout_add(&sc->sc_read_to, hz >> 2); } else { if (hs->sc_count == 1) { (void) nhpibwait(hd, MIS_BO); hd->hpib_acr = AUX_EOI; hd->hpib_data = *hs->sc_addr; hd->hpib_mim = MIS_BO; } #ifdef DEBUG else if (hs->sc_count) panic("nhpibdone"); #endif } } int nhpibintr(arg) void *arg; { struct nhpib_softc *sc = arg; struct hpibbus_softc *hs = sc->sc_hpibbus; struct nhpibdevice *hd = sc->sc_regs; struct hpibqueue *hq; int stat0; int stat1; #ifdef lint if (stat1 = unit) return(1); #endif if ((hd->hpib_ids & IDS_IR) == 0) return(0); stat0 = hd->hpib_mis; stat1 = hd->hpib_lis; hq = TAILQ_FIRST(&hs->sc_queue); if (hs->sc_flags & HPIBF_IO) { hd->hpib_mim = 0; if ((hs->sc_flags & HPIBF_DONE) == 0) { hs->sc_flags &= ~HPIBF_TIMO; dmastop(hs->sc_dq->dq_chan); } else if (hs->sc_flags & HPIBF_TIMO) timeout_del(&sc->sc_read_to); hd->hpib_acr = AUX_TCA; hs->sc_flags &= ~(HPIBF_DONE|HPIBF_IO|HPIBF_READ|HPIBF_TIMO); dmafree(hs->sc_dq); (hq->hq_intr)(hq->hq_softc); } else if (hs->sc_flags & HPIBF_PPOLL) { hd->hpib_mim = 0; stat0 = nhpibppoll(hs); if (stat0 & (0x80 >> hq->hq_slave)) { hs->sc_flags &= ~HPIBF_PPOLL; (hq->hq_intr)(hq->hq_softc); } #ifdef DEBUG else printf("%s: PPOLL intr bad status %x\n", hs->sc_dev.dv_xname, stat0); #endif } return(1); } int nhpibppoll(hs) struct hpibbus_softc *hs; { struct nhpib_softc *sc = (struct nhpib_softc *)hs->sc_dev.dv_parent; struct nhpibdevice *hd = sc->sc_regs; int ppoll; hd->hpib_acr = AUX_SPP; DELAY(25); ppoll = hd->hpib_cpt; hd->hpib_acr = AUX_CPP; return(ppoll); } #ifdef DEBUG int nhpibreporttimo = 0; #endif int nhpibwait(hd, x) struct nhpibdevice *hd; int x; { int timo = hpibtimeout; while ((hd->hpib_mis & x) == 0 && --timo) DELAY(1); if (timo == 0) { #ifdef DEBUG if (nhpibreporttimo) printf("hpib0: %s timo\n", x==MIS_BO?"OUT":"IN"); #endif return(-1); } return(0); } void nhpibppwatch(arg) void *arg; { struct hpibbus_softc *hs = arg; struct nhpib_softc *sc = (struct nhpib_softc *)hs->sc_dev.dv_parent; if ((hs->sc_flags & HPIBF_PPOLL) == 0) return; again: if (nhpibppoll(hs) & (0x80 >> TAILQ_FIRST(&hs->sc_queue)->hq_slave)) sc->sc_regs->hpib_mim = MIS_BO; else if (cold) /* timeouts not working yet */ goto again; else timeout_add(&sc->sc_watch_to, 1); }