/* $NetBSD: if_fxp_pci.c,v 1.12 2000/12/28 22:59:13 sommerfeld Exp $ */ /*- * Copyright (c) 1997, 1998, 1999, 2000 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, * NASA Ames Research Center. * * 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the NetBSD * Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation 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 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. */ /* * PCI bus front-end for the Intel i82557 fast Ethernet controller * driver. Works with Intel Etherexpress Pro 10+, 100B, 100+ cards. */ #include "opt_inet.h" #include "opt_ns.h" #include "bpfilter.h" #include "rnd.h" #include #include #include #include #include #include #include #include #include #if NRND > 0 #include #endif #include #include #include #include #include #if NBPFILTER > 0 #include #endif #ifdef INET #include #include #endif #ifdef NS #include #include #endif #include #include #include #include #include #include #include #include struct fxp_pci_softc { struct fxp_softc psc_fxp; pci_chipset_tag_t psc_pc; /* pci chipset tag */ pcireg_t psc_regs[0x20>>2]; /* saved PCI config regs (sparse) */ pcitag_t psc_tag; /* pci register tag */ void *psc_powerhook; /* power hook */ }; int fxp_pci_match __P((struct device *, struct cfdata *, void *)); void fxp_pci_attach __P((struct device *, struct device *, void *)); static void fxp_pci_confreg_restore __P((struct fxp_pci_softc *psc)); static void fxp_pci_power __P((int why, void *arg)); struct cfattach fxp_pci_ca = { sizeof(struct fxp_pci_softc), fxp_pci_match, fxp_pci_attach }; const struct fxp_pci_product { u_int32_t fpp_prodid; /* PCI product ID */ const char *fpp_name; /* device name */ } fxp_pci_products[] = { { PCI_PRODUCT_INTEL_82557, "Intel i82557 Ethernet" }, { PCI_PRODUCT_INTEL_82559ER, "Intel i82559ER Ethernet" }, { PCI_PRODUCT_INTEL_IN_BUSINESS, "Intel InBusiness Ethernet" }, { PCI_PRODUCT_INTEL_82801BA_LAN, "Intel i82562 Ethernet" }, { 0, NULL }, }; const struct fxp_pci_product *fxp_pci_lookup __P((const struct pci_attach_args *)); const struct fxp_pci_product * fxp_pci_lookup(pa) const struct pci_attach_args *pa; { const struct fxp_pci_product *fpp; if (PCI_VENDOR(pa->pa_id) != PCI_VENDOR_INTEL) return (NULL); for (fpp = fxp_pci_products; fpp->fpp_name != NULL; fpp++) if (PCI_PRODUCT(pa->pa_id) == fpp->fpp_prodid) return (fpp); return (NULL); } int fxp_pci_match(parent, match, aux) struct device *parent; struct cfdata *match; void *aux; { struct pci_attach_args *pa = aux; if (fxp_pci_lookup(pa) != NULL) return (1); return (0); } /* * Restore PCI configuration registers that may have been clobbered. * This is necessary due to bugs on the Sony VAIO Z505-series on-board * ethernet, after an APM suspend/resume, as well as after an ACPI * D3->D0 transition. We call this function from a power hook after * APM resume events, as well as after the ACPI D3->D0 transition. */ static void fxp_pci_confreg_restore(psc) struct fxp_pci_softc *psc; { pcireg_t reg; #if 0 /* * Check to see if the command register is blank -- if so, then * we'll assume that all the clobberable-registers have been * clobbered. */ /* * In general, the above metric is accurate. Unfortunately, * it is inaccurate across a hibernation. Ideally APM/ACPI * code should take note of hibernation events and execute * a hibernation wakeup hook, but at present a hibernation wake * is indistinguishable from a suspend wake. */ if (((reg = pci_conf_read(psc->psc_pc, psc->psc_tag, PCI_COMMAND_STATUS_REG)) & 0xffff) != 0) return; #else reg = pci_conf_read(psc->psc_pc, psc->psc_tag, PCI_COMMAND_STATUS_REG); #endif pci_conf_write(psc->psc_pc, psc->psc_tag, PCI_COMMAND_STATUS_REG, (reg & 0xffff0000) | (psc->psc_regs[PCI_COMMAND_STATUS_REG>>2] & 0xffff)); pci_conf_write(psc->psc_pc, psc->psc_tag, PCI_BHLC_REG, psc->psc_regs[PCI_BHLC_REG>>2]); pci_conf_write(psc->psc_pc, psc->psc_tag, PCI_MAPREG_START+0x0, psc->psc_regs[(PCI_MAPREG_START+0x0)>>2]); pci_conf_write(psc->psc_pc, psc->psc_tag, PCI_MAPREG_START+0x4, psc->psc_regs[(PCI_MAPREG_START+0x4)>>2]); pci_conf_write(psc->psc_pc, psc->psc_tag, PCI_MAPREG_START+0x8, psc->psc_regs[(PCI_MAPREG_START+0x8)>>2]); } /* * Power handler routine. Called when the system is transitioning into/out * of power save modes. We restore the (bashed) PCI configuration registers * on a resume. */ static void fxp_pci_power(why, arg) int why; void *arg; { struct fxp_pci_softc *psc = arg; if (why == PWR_RESUME) fxp_pci_confreg_restore(psc); } void fxp_pci_attach(parent, self, aux) struct device *parent, *self; void *aux; { struct fxp_pci_softc *psc = (struct fxp_pci_softc *)self; struct fxp_softc *sc = (struct fxp_softc *)self; struct pci_attach_args *pa = aux; pci_chipset_tag_t pc = pa->pa_pc; pci_intr_handle_t ih; const struct fxp_pci_product *fpp; const char *intrstr = NULL; bus_space_tag_t iot, memt; bus_space_handle_t ioh, memh; int ioh_valid, memh_valid; bus_addr_t addr; bus_size_t size; int flags; int pci_pwrmgmt_cap_reg, pci_pwrmgmt_csr_reg; sc->sc_enabled = 1; sc->sc_enable = NULL; sc->sc_disable = NULL; /* * Map control/status registers. */ ioh_valid = (pci_mapreg_map(pa, FXP_PCI_IOBA, PCI_MAPREG_TYPE_IO, 0, &iot, &ioh, NULL, NULL) == 0); /* * Version 2.1 of the PCI spec, page 196, "Address Maps": * * Prefetchable * * Set to one if there are no side effects on reads, the * device returns all bytes regardless of the byte enables, * and host bridges can merge processor writes into this * range without causing errors. Bit must be set to zero * otherwise. * * The 82557 incorrectly sets the "prefetchable" bit, resulting * in errors on systems which will do merged reads and writes. * These errors manifest themselves as all-bits-set when reading * from the EEPROM or other < 4 byte registers. * * We must work around this problem by always forcing the mapping * for memory space to be uncacheable. On systems which cannot * create an uncacheable mapping (because the firmware mapped it * into only cacheable/prefetchable space due to the "prefetchable" * bit), we can fall back onto i/o mapped access. */ memh_valid = 0; memt = pa->pa_memt; if (((pa->pa_flags & PCI_FLAGS_MEM_ENABLED) != 0) && pci_mapreg_info(pa->pa_pc, pa->pa_tag, FXP_PCI_MMBA, PCI_MAPREG_TYPE_MEM|PCI_MAPREG_MEM_TYPE_32BIT, &addr, &size, &flags) == 0) { flags &= ~BUS_SPACE_MAP_PREFETCHABLE; if (bus_space_map(memt, addr, size, flags, &memh) == 0) memh_valid = 1; } if (memh_valid) { sc->sc_st = memt; sc->sc_sh = memh; } else if (ioh_valid) { sc->sc_st = iot; sc->sc_sh = ioh; } else { printf(": unable to map device registers\n"); return; } sc->sc_dmat = pa->pa_dmat; fpp = fxp_pci_lookup(pa); if (fpp == NULL) { printf("\n"); panic("fxp_pci_attach: impossible"); } /* * XXX Perhaps report '557, '558, '559 based on revision? */ printf(": %s, rev %d\n", fpp->fpp_name, PCI_REVISION(pa->pa_class)); /* Make sure bus-mastering is enabled. */ pci_conf_write(pc, pa->pa_tag, PCI_COMMAND_STATUS_REG, pci_conf_read(pc, pa->pa_tag, PCI_COMMAND_STATUS_REG) | PCI_COMMAND_MASTER_ENABLE); /* * Under some circumstances (such as APM suspend/resume * cycles, and across ACPI power state changes), the * i82257-family can lose the contents of critical PCI * configuration registers, causing the card to be * non-responsive and useless. This occurs on the Sony VAIO * Z505-series, among others. Preserve them here so they can * be later restored (by fxp_pci_confreg_restore()). */ psc->psc_pc = pc; psc->psc_tag = pa->pa_tag; psc->psc_regs[PCI_COMMAND_STATUS_REG>>2] = pci_conf_read(pc, pa->pa_tag, PCI_COMMAND_STATUS_REG); psc->psc_regs[PCI_BHLC_REG>>2] = pci_conf_read(pc, pa->pa_tag, PCI_BHLC_REG); psc->psc_regs[(PCI_MAPREG_START+0x0)>>2] = pci_conf_read(pc, pa->pa_tag, PCI_MAPREG_START+0x0); psc->psc_regs[(PCI_MAPREG_START+0x4)>>2] = pci_conf_read(pc, pa->pa_tag, PCI_MAPREG_START+0x4); psc->psc_regs[(PCI_MAPREG_START+0x8)>>2] = pci_conf_read(pc, pa->pa_tag, PCI_MAPREG_START+0x8); /* * Work around BIOS ACPI bugs where the chip is inadvertantly * left in ACPI D3 (lowest power state). First confirm the device * supports ACPI power management, then move it to the D0 (fully * functional) state if it is not already there. */ if (pci_get_capability(pc, pa->pa_tag, PCI_CAP_PWRMGMT, &pci_pwrmgmt_cap_reg, 0)) { pcireg_t reg; pci_pwrmgmt_csr_reg = pci_pwrmgmt_cap_reg + 4; reg = pci_conf_read(pc, pa->pa_tag, pci_pwrmgmt_csr_reg); if ((reg & PCI_PMCSR_STATE_MASK) != PCI_PMCSR_STATE_D0) { pci_conf_write(pc, pa->pa_tag, pci_pwrmgmt_csr_reg, (reg & ~PCI_PMCSR_STATE_MASK) | PCI_PMCSR_STATE_D0); } } /* Restore PCI configuration registers. */ fxp_pci_confreg_restore(psc); /* * Map and establish our interrupt. */ if (pci_intr_map(pa, &ih)) { printf("%s: couldn't map interrupt\n", sc->sc_dev.dv_xname); return; } intrstr = pci_intr_string(pc, ih); sc->sc_ih = pci_intr_establish(pc, ih, IPL_NET, fxp_intr, sc); if (sc->sc_ih == NULL) { printf("%s: couldn't establish interrupt", sc->sc_dev.dv_xname); if (intrstr != NULL) printf(" at %s", intrstr); printf("\n"); return; } printf("%s: interrupting at %s\n", sc->sc_dev.dv_xname, intrstr); /* Finish off the attach. */ fxp_attach(sc); /* Add a suspend hook to restore PCI config state */ psc->psc_powerhook = powerhook_establish(fxp_pci_power, psc); if (psc->psc_powerhook == NULL) printf ("%s: WARNING: unable to establish pci power hook\n", sc->sc_dev.dv_xname); }