394 lines
12 KiB
C
394 lines
12 KiB
C
/* $NetBSD: if_fxp_pci.c,v 1.8 2000/05/12 18:46:34 jhawk Exp $ */
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/*-
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* Copyright (c) 1997, 1998, 1999, 2000 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
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* NASA Ames Research Center.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* PCI bus front-end for the Intel i82557 fast Ethernet controller
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* driver. Works with Intel Etherexpress Pro 10+, 100B, 100+ cards.
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*/
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#include "opt_inet.h"
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#include "opt_ns.h"
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#include "bpfilter.h"
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#include "rnd.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/mbuf.h>
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#include <sys/malloc.h>
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#include <sys/kernel.h>
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#include <sys/socket.h>
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#include <sys/ioctl.h>
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#include <sys/errno.h>
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#include <sys/device.h>
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#if NRND > 0
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#include <sys/rnd.h>
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#endif
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#include <machine/endian.h>
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#include <net/if.h>
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#include <net/if_dl.h>
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#include <net/if_media.h>
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#include <net/if_ether.h>
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#if NBPFILTER > 0
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#include <net/bpf.h>
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#endif
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#ifdef INET
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#include <netinet/in.h>
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#include <netinet/if_inarp.h>
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#endif
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#ifdef NS
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#include <netns/ns.h>
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#include <netns/ns_if.h>
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#endif
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#include <machine/bus.h>
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#include <machine/intr.h>
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#include <dev/mii/miivar.h>
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#include <dev/ic/i82557reg.h>
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#include <dev/ic/i82557var.h>
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#include <dev/pci/pcivar.h>
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#include <dev/pci/pcireg.h>
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#include <dev/pci/pcidevs.h>
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struct fxp_pci_softc {
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struct fxp_softc psc_fxp;
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pci_chipset_tag_t psc_pc; /* pci chipset tag */
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pcireg_t psc_regs[0x20>>2]; /* saved PCI config regs (sparse) */
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pcitag_t psc_tag; /* pci register tag */
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void *psc_powerhook; /* power hook */
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};
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int fxp_pci_match __P((struct device *, struct cfdata *, void *));
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void fxp_pci_attach __P((struct device *, struct device *, void *));
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static void fxp_pci_confreg_restore __P((struct fxp_pci_softc *psc));
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static void fxp_pci_power __P((int why, void *arg));
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struct cfattach fxp_pci_ca = {
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sizeof(struct fxp_pci_softc), fxp_pci_match, fxp_pci_attach
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};
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const struct fxp_pci_product {
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u_int32_t fpp_prodid; /* PCI product ID */
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const char *fpp_name; /* device name */
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} fxp_pci_products[] = {
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{ PCI_PRODUCT_INTEL_82557,
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"Intel i82557 Ethernet" },
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{ PCI_PRODUCT_INTEL_IN_BUSINESS,
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"Intel InBusiness Ethernet" },
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{ 0,
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NULL },
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};
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const struct fxp_pci_product *fxp_pci_lookup
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__P((const struct pci_attach_args *));
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const struct fxp_pci_product *
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fxp_pci_lookup(pa)
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const struct pci_attach_args *pa;
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{
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const struct fxp_pci_product *fpp;
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if (PCI_VENDOR(pa->pa_id) != PCI_VENDOR_INTEL)
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return (NULL);
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for (fpp = fxp_pci_products; fpp->fpp_name != NULL; fpp++)
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if (PCI_PRODUCT(pa->pa_id) == fpp->fpp_prodid)
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return (fpp);
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return (NULL);
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}
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int
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fxp_pci_match(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 pci_attach_args *pa = aux;
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if (fxp_pci_lookup(pa) != NULL)
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return (1);
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return (0);
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}
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/*
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* Restore PCI configuration registers that may have been clobbered.
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* This is necessary due to bugs on the Sony VAIO Z505-series on-board
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* ethernet, after an APM suspend/resume, as well as after an ACPI
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* D3->D0 transition. We call this function from a power hook after
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* APM resume events, as well as after the ACPI D3->D0 transition.
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*/
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static void
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fxp_pci_confreg_restore(psc)
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struct fxp_pci_softc *psc;
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{
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pcireg_t reg;
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#if 0
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/*
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* Check to see if the command register is blank -- if so, then
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* we'll assume that all the clobberable-registers have been
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* clobbered.
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*/
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/*
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* In general, the above metric is accurate. Unfortunately,
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* it is inaccurate across a hibernation. Ideally APM/ACPI
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* code should take note of hibernation events and execute
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* a hibernation wakeup hook, but at present a hibernation wake
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* is indistinguishable from a suspend wake.
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*/
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if (((reg = pci_conf_read(psc->psc_pc, psc->psc_tag,
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PCI_COMMAND_STATUS_REG)) & 0xffff) != 0)
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return;
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#endif
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pci_conf_write(psc->psc_pc, psc->psc_tag,
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PCI_COMMAND_STATUS_REG,
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(reg & 0xffff0000) |
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(psc->psc_regs[PCI_COMMAND_STATUS_REG>>2] & 0xffff));
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pci_conf_write(psc->psc_pc, psc->psc_tag, PCI_BHLC_REG,
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psc->psc_regs[PCI_BHLC_REG>>2]);
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pci_conf_write(psc->psc_pc, psc->psc_tag, PCI_MAPREG_START+0x0,
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psc->psc_regs[(PCI_MAPREG_START+0x0)>>2]);
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pci_conf_write(psc->psc_pc, psc->psc_tag, PCI_MAPREG_START+0x4,
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psc->psc_regs[(PCI_MAPREG_START+0x4)>>2]);
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pci_conf_write(psc->psc_pc, psc->psc_tag, PCI_MAPREG_START+0x8,
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psc->psc_regs[(PCI_MAPREG_START+0x8)>>2]);
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}
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/*
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* Power handler routine. Called when the system is transitioning into/out
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* of power save modes. We restore the (bashed) PCI configuration registers
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* on a resume.
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*/
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static void
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fxp_pci_power(why, arg)
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int why;
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void *arg;
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{
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struct fxp_pci_softc *psc = arg;
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if (why == PWR_RESUME)
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fxp_pci_confreg_restore(psc);
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}
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void
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fxp_pci_attach(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 fxp_pci_softc *psc = (struct fxp_pci_softc *)self;
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struct fxp_softc *sc = (struct fxp_softc *)self;
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struct pci_attach_args *pa = aux;
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pci_chipset_tag_t pc = pa->pa_pc;
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pci_intr_handle_t ih;
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const struct fxp_pci_product *fpp;
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const char *intrstr = NULL;
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bus_space_tag_t iot, memt;
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bus_space_handle_t ioh, memh;
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int ioh_valid, memh_valid;
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bus_addr_t addr;
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bus_size_t size;
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int flags;
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int pci_pwrmgmt_cap_reg, pci_pwrmgmt_csr_reg;
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sc->sc_enabled = 1;
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sc->sc_enable = NULL;
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sc->sc_disable = NULL;
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/*
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* Map control/status registers.
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*/
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ioh_valid = (pci_mapreg_map(pa, FXP_PCI_IOBA,
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PCI_MAPREG_TYPE_IO, 0,
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&iot, &ioh, NULL, NULL) == 0);
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/*
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* Version 2.1 of the PCI spec, page 196, "Address Maps":
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*
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* Prefetchable
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*
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* Set to one if there are no side effects on reads, the
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* device returns all bytes regardless of the byte enables,
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* and host bridges can merge processor writes into this
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* range without causing errors. Bit must be set to zero
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* otherwise.
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*
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* The 82557 incorrectly sets the "prefetchable" bit, resulting
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* in errors on systems which will do merged reads and writes.
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* These errors manifest themselves as all-bits-set when reading
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* from the EEPROM or other < 4 byte registers.
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*
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* We must work around this problem by always forcing the mapping
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* for memory space to be uncacheable. On systems which cannot
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* create an uncacheable mapping (because the firmware mapped it
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* into only cacheable/prefetchable space due to the "prefetchable"
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* bit), we can fall back onto i/o mapped access.
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*/
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memh_valid = 0;
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memt = pa->pa_memt;
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if (((pa->pa_flags & PCI_FLAGS_MEM_ENABLED) != 0) &&
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pci_mapreg_info(pa->pa_pc, pa->pa_tag, FXP_PCI_MMBA,
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PCI_MAPREG_TYPE_MEM|PCI_MAPREG_MEM_TYPE_32BIT,
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&addr, &size, &flags) == 0) {
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flags &= ~BUS_SPACE_MAP_PREFETCHABLE;
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if (bus_space_map(memt, addr, size, flags, &memh) == 0)
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memh_valid = 1;
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}
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if (memh_valid) {
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sc->sc_st = memt;
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sc->sc_sh = memh;
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} else if (ioh_valid) {
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sc->sc_st = iot;
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sc->sc_sh = ioh;
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} else {
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printf(": unable to map device registers\n");
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return;
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}
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sc->sc_dmat = pa->pa_dmat;
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fpp = fxp_pci_lookup(pa);
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if (fpp == NULL) {
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printf("\n");
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panic("fxp_pci_attach: impossible");
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}
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/*
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* XXX Perhaps report '557, '558, '559 based on revision?
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*/
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printf(": %s, rev %d\n", fpp->fpp_name, PCI_REVISION(pa->pa_class));
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/* Make sure bus-mastering is enabled. */
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pci_conf_write(pc, pa->pa_tag, PCI_COMMAND_STATUS_REG,
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pci_conf_read(pc, pa->pa_tag, PCI_COMMAND_STATUS_REG) |
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PCI_COMMAND_MASTER_ENABLE);
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/*
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* Under some circumstances (such as APM suspend/resume
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* cycles, and across ACPI power state changes), the
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* i82257-family can lose the contents of critical PCI
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* configuration registers, causing the card to be
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* non-responsive and useless. This occurs on the Sony VAIO
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* Z505-series, among others. Preserve them here so they can
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* be later restored (by fxp_pci_confreg_restore()).
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*/
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psc->psc_pc = pc;
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psc->psc_tag = pa->pa_tag;
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psc->psc_regs[PCI_COMMAND_STATUS_REG>>2] =
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pci_conf_read(pc, pa->pa_tag, PCI_COMMAND_STATUS_REG);
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psc->psc_regs[PCI_BHLC_REG>>2] =
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pci_conf_read(pc, pa->pa_tag, PCI_BHLC_REG);
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psc->psc_regs[(PCI_MAPREG_START+0x0)>>2] =
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pci_conf_read(pc, pa->pa_tag, PCI_MAPREG_START+0x0);
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psc->psc_regs[(PCI_MAPREG_START+0x4)>>2] =
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pci_conf_read(pc, pa->pa_tag, PCI_MAPREG_START+0x4);
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psc->psc_regs[(PCI_MAPREG_START+0x8)>>2] =
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pci_conf_read(pc, pa->pa_tag, PCI_MAPREG_START+0x8);
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/*
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* Work around BIOS ACPI bugs where the chip is inadvertantly
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* left in ACPI D3 (lowest power state). First confirm the device
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* supports ACPI power management, then move it to the D0 (fully
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* functional) state if it is not already there.
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*/
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if (pci_get_capability(pc, pa->pa_tag, PCI_CAP_PWRMGMT,
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&pci_pwrmgmt_cap_reg, 0)) {
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pcireg_t reg;
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pci_pwrmgmt_csr_reg = pci_pwrmgmt_cap_reg + 4;
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reg = pci_conf_read(pc, pa->pa_tag, pci_pwrmgmt_csr_reg);
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if ((reg & PCI_PMCSR_STATE_MASK) != PCI_PMCSR_STATE_D0) {
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pci_conf_write(pc, pa->pa_tag, pci_pwrmgmt_csr_reg,
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(reg & ~PCI_PMCSR_STATE_MASK) |
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PCI_PMCSR_STATE_D0);
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}
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}
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/* Restore PCI configuration registers. */
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fxp_pci_confreg_restore(psc);
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/*
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* Map and establish our interrupt.
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*/
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if (pci_intr_map(pc, pa->pa_intrtag, pa->pa_intrpin,
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pa->pa_intrline, &ih)) {
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printf("%s: couldn't map interrupt\n", sc->sc_dev.dv_xname);
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return;
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}
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intrstr = pci_intr_string(pc, ih);
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sc->sc_ih = pci_intr_establish(pc, ih, IPL_NET, fxp_intr, sc);
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if (sc->sc_ih == NULL) {
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printf("%s: couldn't establish interrupt",
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sc->sc_dev.dv_xname);
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if (intrstr != NULL)
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printf(" at %s", intrstr);
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printf("\n");
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return;
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}
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printf("%s: interrupting at %s\n", sc->sc_dev.dv_xname, intrstr);
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/* Finish off the attach. */
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fxp_attach(sc);
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/* Add a suspend hook to restore PCI config state */
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psc->psc_powerhook = powerhook_establish(fxp_pci_power, psc);
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if (psc->psc_powerhook == NULL)
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printf ("%s: WARNING: unable to establish pci power hook\n",
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sc->sc_dev.dv_xname);
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}
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