/* $NetBSD: if_epic_pci.c,v 1.43 2022/09/24 18:12:42 thorpej Exp $ */ /*- * Copyright (c) 1998, 1999 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. * * 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 Standard Microsystems Corp. 83C170 * Ethernet PCI Integrated Controller (EPIC/100) driver. */ #include __KERNEL_RCSID(0, "$NetBSD: if_epic_pci.c,v 1.43 2022/09/24 18:12:42 thorpej Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* * PCI configuration space registers used by the EPIC. */ #define EPIC_PCI_IOBA PCI_BAR(0) /* i/o mapped base */ #define EPIC_PCI_MMBA PCI_BAR(1) /* memory mapped base */ struct epic_pci_softc { struct epic_softc sc_epic; /* real EPIC softc */ /* PCI-specific goo. */ void *sc_ih; /* interrupt handle */ }; static int epic_pci_match(device_t, cfdata_t, void *); static void epic_pci_attach(device_t, device_t, void *); CFATTACH_DECL_NEW(epic_pci, sizeof(struct epic_pci_softc), epic_pci_match, epic_pci_attach, NULL, NULL); static const struct epic_pci_product { uint32_t epp_prodid; /* PCI product ID */ const char *epp_name; /* device name */ } epic_pci_products[] = { { PCI_PRODUCT_SMC_83C170, "SMC 83c170 Fast Ethernet" }, { PCI_PRODUCT_SMC_83C175, "SMC 83c175 Fast Ethernet" }, { 0, NULL }, }; static const struct epic_pci_product * epic_pci_lookup(const struct pci_attach_args *pa) { const struct epic_pci_product *epp; if (PCI_VENDOR(pa->pa_id) != PCI_VENDOR_SMC) return NULL; for (epp = epic_pci_products; epp->epp_name != NULL; epp++) if (PCI_PRODUCT(pa->pa_id) == epp->epp_prodid) return epp; return NULL; } static const struct epic_pci_subsys_info { pcireg_t subsysid; int flags; } epic_pci_subsys_info[] = { { PCI_ID_CODE(PCI_VENDOR_SMC, 0xa015), /* SMC9432BTX */ EPIC_HAS_BNC }, { PCI_ID_CODE(PCI_VENDOR_SMC, 0xa024), /* SMC9432BTX1 */ EPIC_HAS_BNC }, { PCI_ID_CODE(PCI_VENDOR_SMC, 0xa016), /* SMC9432FTX */ EPIC_HAS_MII_FIBER | EPIC_DUPLEXLED_ON_694 }, { 0xffffffff, 0 } }; static const struct epic_pci_subsys_info * epic_pci_subsys_lookup(const struct pci_attach_args *pa) { pci_chipset_tag_t pc = pa->pa_pc; pcireg_t reg; const struct epic_pci_subsys_info *esp; reg = pci_conf_read(pc, pa->pa_tag, PCI_SUBSYS_ID_REG); for (esp = epic_pci_subsys_info; esp->subsysid != 0xffffffff; esp++) if (esp->subsysid == reg) return esp; return NULL; } static int epic_pci_match(device_t parent, cfdata_t cf, void *aux) { struct pci_attach_args *pa = aux; if (epic_pci_lookup(pa) != NULL) return 1; return 0; } static void epic_pci_attach(device_t parent, device_t self, void *aux) { struct epic_pci_softc *psc = device_private(self); struct epic_softc *sc = &psc->sc_epic; struct pci_attach_args *pa = aux; pci_chipset_tag_t pc = pa->pa_pc; pci_intr_handle_t ih; const char *intrstr = NULL; const struct epic_pci_product *epp; const struct epic_pci_subsys_info *esp; bus_space_tag_t iot, memt; bus_space_handle_t ioh, memh; int ioh_valid, memh_valid; int error; char intrbuf[PCI_INTRSTR_LEN]; sc->sc_dev = self; epp = epic_pci_lookup(pa); if (epp == NULL) { aprint_normal("\n"); panic("%s: impossible", __func__); } pci_aprint_devinfo_fancy(pa, "Ethernet controller", epp->epp_name, 1); /* power up chip */ if ((error = pci_activate(pa->pa_pc, pa->pa_tag, self, NULL)) && error != EOPNOTSUPP) { aprint_error_dev(self, "cannot activate %d\n", error); return; } /* * Map the device. */ ioh_valid = (pci_mapreg_map(pa, EPIC_PCI_IOBA, PCI_MAPREG_TYPE_IO, 0, &iot, &ioh, NULL, NULL) == 0); memh_valid = (pci_mapreg_map(pa, EPIC_PCI_MMBA, PCI_MAPREG_TYPE_MEM|PCI_MAPREG_MEM_TYPE_32BIT, 0, &memt, &memh, NULL, NULL) == 0); if (memh_valid) { sc->sc_st = memt; sc->sc_sh = memh; } else if (ioh_valid) { sc->sc_st = iot; sc->sc_sh = ioh; } else { aprint_error_dev(self, "unable to map device registers\n"); return; } sc->sc_dmat = pa->pa_dmat; /* 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); /* * Map and establish our interrupt. */ if (pci_intr_map(pa, &ih)) { aprint_error_dev(self, "unable to map interrupt\n"); return; } intrstr = pci_intr_string(pc, ih, intrbuf, sizeof(intrbuf)); psc->sc_ih = pci_intr_establish_xname(pc, ih, IPL_NET, epic_intr, sc, device_xname(self)); if (psc->sc_ih == NULL) { aprint_error_dev(self, "unable to establish interrupt"); if (intrstr != NULL) aprint_error(" at %s", intrstr); aprint_error("\n"); return; } aprint_normal_dev(self, "interrupting at %s\n", intrstr); esp = epic_pci_subsys_lookup(pa); if (esp) sc->sc_hwflags = esp->flags; /* * Finish off the attach. */ epic_attach(sc); }