/* $NetBSD: cia.c,v 1.37 1998/06/04 21:34:45 thorpej Exp $ */ /* * Copyright (c) 1995, 1996 Carnegie-Mellon University. * All rights reserved. * * Author: Chris G. Demetriou * * Permission to use, copy, modify and distribute this software and * its documentation is hereby granted, provided that both the copyright * notice and this permission notice appear in all copies of the * software, derivative works or modified versions, and any portions * thereof, and that both notices appear in supporting documentation. * * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. * * Carnegie Mellon requests users of this software to return to * * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU * School of Computer Science * Carnegie Mellon University * Pittsburgh PA 15213-3890 * * any improvements or extensions that they make and grant Carnegie the * rights to redistribute these changes. */ #include "opt_dec_eb164.h" #include "opt_dec_kn20aa.h" #include /* RCS ID & Copyright macro defns */ __KERNEL_RCSID(0, "$NetBSD: cia.c,v 1.37 1998/06/04 21:34:45 thorpej Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef DEC_KN20AA #include #endif #ifdef DEC_EB164 #include #endif int ciamatch __P((struct device *, struct cfdata *, void *)); void ciaattach __P((struct device *, struct device *, void *)); struct cfattach cia_ca = { sizeof(struct cia_softc), ciamatch, ciaattach, }; extern struct cfdriver cia_cd; static int ciaprint __P((void *, const char *pnp)); /* There can be only one. */ int ciafound; struct cia_config cia_configuration; /* * This determines if we attempt to use BWX for PCI bus and config space * access. Some systems, notably with Pyxis, don't fare so well unless * BWX is used. */ #ifndef CIA_USE_BWX #define CIA_USE_BWX 1 #endif int cia_use_bwx = CIA_USE_BWX; int ciamatch(parent, match, aux) struct device *parent; struct cfdata *match; void *aux; { struct mainbus_attach_args *ma = aux; /* Make sure that we're looking for a CIA. */ if (strcmp(ma->ma_name, cia_cd.cd_name) != 0) return (0); if (ciafound) return (0); return (1); } /* * Set up the chipset's function pointers. */ void cia_init(ccp, mallocsafe) struct cia_config *ccp; int mallocsafe; { ccp->cc_hae_mem = REGVAL(CIA_CSR_HAE_MEM); ccp->cc_hae_io = REGVAL(CIA_CSR_HAE_IO); ccp->cc_rev = REGVAL(CIA_CSR_REV) & REV_MASK; /* * Determine if we have a Pyxis. Only two systypes can * have this: the EB164 systype (AlphaPC164LX and AlphaPC164SX) * and the DEC_550 systype (Miata). */ if ((hwrpb->rpb_type == ST_EB164 && (hwrpb->rpb_variation & SV_ST_MASK) >= SV_ST_ALPHAPC164LX_400) || hwrpb->rpb_type == ST_DEC_550) ccp->cc_flags |= CCF_ISPYXIS; /* * Revisions >= 2 have the CNFG register. */ if (ccp->cc_rev >= 2) ccp->cc_cnfg = REGVAL(CIA_CSR_CNFG); else ccp->cc_cnfg = 0; /* * Use BWX iff: * * - It hasn't been disbled by the user, * - it's enabled in CNFG, * - we're implementation version ev5, * - BWX is enabled in the CPU's capabilities mask (yes, * the bit is really cleared if the capability exists...) */ if (cia_use_bwx != 0 && (ccp->cc_cnfg & CNFG_BWEN) != 0 && alpha_implver() == ALPHA_IMPLVER_EV5 && alpha_amask(ALPHA_AMASK_BWX) == 0) ccp->cc_flags |= CCF_USEBWX; if (!ccp->cc_initted) { /* don't do these twice since they set up extents */ if (ccp->cc_flags & CCF_USEBWX) { cia_bwx_bus_io_init(&ccp->cc_iot, ccp); cia_bwx_bus_mem_init(&ccp->cc_memt, ccp); } else { cia_swiz_bus_io_init(&ccp->cc_iot, ccp); cia_swiz_bus_mem_init(&ccp->cc_memt, ccp); } } ccp->cc_mallocsafe = mallocsafe; cia_pci_init(&ccp->cc_pc, ccp); cia_dma_init(ccp); ccp->cc_initted = 1; } void ciaattach(parent, self, aux) struct device *parent, *self; void *aux; { struct cia_softc *sc = (struct cia_softc *)self; struct cia_config *ccp; struct pcibus_attach_args pba; char bits[64]; /* note that we've attached the chipset; can't have 2 CIAs. */ ciafound = 1; /* * set up the chipset's info; done once at console init time * (maybe), but we must do it here as well to take care of things * that need to use memory allocation. */ ccp = sc->sc_ccp = &cia_configuration; cia_init(ccp, 1); printf(": DECchip 2117x Core Logic Chipset (%s), pass %d\n", (ccp->cc_flags & CCF_ISPYXIS) ? "Pyxis" : "ALCOR/ALCOR2", ccp->cc_rev + 1); if (ccp->cc_cnfg) printf("%s: extended capabilities: %s\n", self->dv_xname, bitmask_snprintf(ccp->cc_cnfg, CIA_CSR_CNFG_BITS, bits, sizeof(bits))); #if 1 if (ccp->cc_flags & CCF_USEBWX) printf("%s: using BWX for PCI config and device access\n", self->dv_xname); #endif switch (hwrpb->rpb_type) { #ifdef DEC_KN20AA case ST_DEC_KN20AA: pci_kn20aa_pickintr(ccp); #ifdef EVCNT_COUNTERS evcnt_attach(self, "intr", &kn20aa_intr_evcnt); #endif break; #endif #ifdef DEC_EB164 case ST_EB164: pci_eb164_pickintr(ccp); #ifdef EVCNT_COUNTERS evcnt_attach(self, "intr", &eb164_intr_evcnt); #endif break; #endif default: panic("ciaattach: shouldn't be here, really..."); } pba.pba_busname = "pci"; pba.pba_iot = &ccp->cc_iot; pba.pba_memt = &ccp->cc_memt; pba.pba_dmat = alphabus_dma_get_tag(&ccp->cc_dmat_direct, ALPHA_BUS_PCI); pba.pba_pc = &ccp->cc_pc; pba.pba_bus = 0; pba.pba_flags = PCI_FLAGS_IO_ENABLED | PCI_FLAGS_MEM_ENABLED; config_found(self, &pba, ciaprint); } static int ciaprint(aux, pnp) void *aux; const char *pnp; { register struct pcibus_attach_args *pba = aux; /* only PCIs can attach to CIAs; easy. */ if (pnp) printf("%s at %s", pba->pba_busname, pnp); printf(" bus %d", pba->pba_bus); return (UNCONF); }