279 lines
6.8 KiB
C
279 lines
6.8 KiB
C
/* $NetBSD: cia.c,v 1.40 1998/06/05 02:15:38 thorpej Exp $ */
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/*
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* Copyright (c) 1995, 1996 Carnegie-Mellon University.
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* All rights reserved.
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*
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* Author: Chris G. Demetriou
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*
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* Permission to use, copy, modify and distribute this software and
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* its documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
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* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie the
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* rights to redistribute these changes.
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*/
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#include "opt_dec_eb164.h"
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#include "opt_dec_kn20aa.h"
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#include "opt_dec_550.h"
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#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
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__KERNEL_RCSID(0, "$NetBSD: cia.c,v 1.40 1998/06/05 02:15:38 thorpej Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/device.h>
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#include <vm/vm.h>
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#include <machine/autoconf.h>
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#include <machine/rpb.h>
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#include <dev/isa/isareg.h>
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#include <dev/isa/isavar.h>
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#include <dev/pci/pcireg.h>
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#include <dev/pci/pcivar.h>
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#include <alpha/pci/ciareg.h>
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#include <alpha/pci/ciavar.h>
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#ifdef DEC_KN20AA
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#include <alpha/pci/pci_kn20aa.h>
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#endif
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#ifdef DEC_EB164
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#include <alpha/pci/pci_eb164.h>
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#endif
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#ifdef DEC_550
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#include <alpha/pci/pci_550.h>
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#endif
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int ciamatch __P((struct device *, struct cfdata *, void *));
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void ciaattach __P((struct device *, struct device *, void *));
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struct cfattach cia_ca = {
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sizeof(struct cia_softc), ciamatch, ciaattach,
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};
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extern struct cfdriver cia_cd;
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static int ciaprint __P((void *, const char *pnp));
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/* There can be only one. */
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int ciafound;
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struct cia_config cia_configuration;
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/*
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* This determines if we attempt to use BWX for PCI bus and config space
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* access. Some systems, notably with Pyxis, don't fare so well unless
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* BWX is used.
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*/
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#ifndef CIA_USE_BWX
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#define CIA_USE_BWX 1
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#endif
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int cia_use_bwx = CIA_USE_BWX;
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int
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ciamatch(parent, match, aux)
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struct device *parent;
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struct cfdata *match;
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void *aux;
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{
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struct mainbus_attach_args *ma = aux;
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/* Make sure that we're looking for a CIA. */
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if (strcmp(ma->ma_name, cia_cd.cd_name) != 0)
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return (0);
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if (ciafound)
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return (0);
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return (1);
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}
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/*
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* Set up the chipset's function pointers.
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*/
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void
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cia_init(ccp, mallocsafe)
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struct cia_config *ccp;
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int mallocsafe;
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{
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ccp->cc_hae_mem = REGVAL(CIA_CSR_HAE_MEM);
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ccp->cc_hae_io = REGVAL(CIA_CSR_HAE_IO);
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ccp->cc_rev = REGVAL(CIA_CSR_REV) & REV_MASK;
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/*
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* Determine if we have a Pyxis. Only two systypes can
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* have this: the EB164 systype (AlphaPC164LX and AlphaPC164SX)
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* and the DEC_550 systype (Miata).
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*/
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if ((hwrpb->rpb_type == ST_EB164 &&
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(hwrpb->rpb_variation & SV_ST_MASK) >= SV_ST_ALPHAPC164LX_400) ||
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hwrpb->rpb_type == ST_DEC_550)
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ccp->cc_flags |= CCF_ISPYXIS;
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/*
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* ALCOR/ALCOR2 Revisions >= 2 and Pyxis have the CNFG register.
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*/
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if (ccp->cc_rev >= 2 || (ccp->cc_flags & CCF_ISPYXIS) != 0)
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ccp->cc_cnfg = REGVAL(CIA_CSR_CNFG);
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else
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ccp->cc_cnfg = 0;
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/*
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* Use BWX iff:
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*
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* - It hasn't been disbled by the user,
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* - it's enabled in CNFG,
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* - we're implementation version ev5,
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* - BWX is enabled in the CPU's capabilities mask (yes,
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* the bit is really cleared if the capability exists...)
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*/
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if (cia_use_bwx != 0 &&
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(ccp->cc_cnfg & CNFG_BWEN) != 0 &&
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alpha_implver() == ALPHA_IMPLVER_EV5 &&
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alpha_amask(ALPHA_AMASK_BWX) == 0) {
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u_int32_t ctrl;
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ccp->cc_flags |= CCF_USEBWX;
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/*
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* For whatever reason, the firmware seems to enable PCI
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* loopback mode if it also enables BWX. Make sure it's
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* enabled if we have an old, buggy firmware rev.
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*/
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alpha_mb();
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ctrl = REGVAL(CIA_CSR_CTRL);
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if ((ctrl & CTRL_PCI_LOOP_EN) == 0) {
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REGVAL(CIA_CSR_CTRL) = ctrl | CTRL_PCI_LOOP_EN;
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alpha_mb();
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}
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}
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if (!ccp->cc_initted) {
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/* don't do these twice since they set up extents */
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if (ccp->cc_flags & CCF_USEBWX) {
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cia_bwx_bus_io_init(&ccp->cc_iot, ccp);
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cia_bwx_bus_mem_init(&ccp->cc_memt, ccp);
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} else {
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cia_swiz_bus_io_init(&ccp->cc_iot, ccp);
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cia_swiz_bus_mem_init(&ccp->cc_memt, ccp);
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}
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}
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ccp->cc_mallocsafe = mallocsafe;
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cia_pci_init(&ccp->cc_pc, ccp);
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cia_dma_init(ccp);
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ccp->cc_initted = 1;
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}
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void
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ciaattach(parent, self, aux)
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struct device *parent, *self;
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void *aux;
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{
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struct cia_softc *sc = (struct cia_softc *)self;
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struct cia_config *ccp;
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struct pcibus_attach_args pba;
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char bits[64];
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/* note that we've attached the chipset; can't have 2 CIAs. */
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ciafound = 1;
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/*
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* set up the chipset's info; done once at console init time
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* (maybe), but we must do it here as well to take care of things
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* that need to use memory allocation.
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*/
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ccp = sc->sc_ccp = &cia_configuration;
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cia_init(ccp, 1);
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printf(": DECchip 2117x Core Logic Chipset (%s), pass %d\n",
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(ccp->cc_flags & CCF_ISPYXIS) ? "Pyxis" : "ALCOR/ALCOR2",
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ccp->cc_rev + 1);
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if (ccp->cc_cnfg)
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printf("%s: extended capabilities: %s\n", self->dv_xname,
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bitmask_snprintf(ccp->cc_cnfg, CIA_CSR_CNFG_BITS,
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bits, sizeof(bits)));
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#if 1
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if (ccp->cc_flags & CCF_USEBWX)
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printf("%s: using BWX for PCI config and device access\n",
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self->dv_xname);
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#endif
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switch (hwrpb->rpb_type) {
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#ifdef DEC_KN20AA
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case ST_DEC_KN20AA:
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pci_kn20aa_pickintr(ccp);
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#ifdef EVCNT_COUNTERS
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evcnt_attach(self, "intr", &kn20aa_intr_evcnt);
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#endif
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break;
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#endif
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#ifdef DEC_EB164
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case ST_EB164:
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pci_eb164_pickintr(ccp);
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#ifdef EVCNT_COUNTERS
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evcnt_attach(self, "intr", &eb164_intr_evcnt);
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#endif
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break;
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#endif
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#ifdef DEC_550
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case ST_DEC_550:
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pci_550_pickintr(ccp);
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#ifdef EVCNT_COUNTERS
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evcnt_attach(self, "intr", &dec_550_intr_evcnt);
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#endif
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break;
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#endif
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default:
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panic("ciaattach: shouldn't be here, really...");
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}
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pba.pba_busname = "pci";
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pba.pba_iot = &ccp->cc_iot;
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pba.pba_memt = &ccp->cc_memt;
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pba.pba_dmat =
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alphabus_dma_get_tag(&ccp->cc_dmat_direct, ALPHA_BUS_PCI);
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pba.pba_pc = &ccp->cc_pc;
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pba.pba_bus = 0;
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pba.pba_flags = PCI_FLAGS_IO_ENABLED | PCI_FLAGS_MEM_ENABLED;
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config_found(self, &pba, ciaprint);
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}
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static int
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ciaprint(aux, pnp)
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void *aux;
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const char *pnp;
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{
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register struct pcibus_attach_args *pba = aux;
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/* only PCIs can attach to CIAs; easy. */
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if (pnp)
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printf("%s at %s", pba->pba_busname, pnp);
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printf(" bus %d", pba->pba_bus);
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return (UNCONF);
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}
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