1 /* $NetBSD: if_epic_pci.c,v 1.41 2014/03/29 19:28:24 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 1998, 1999 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 9 * NASA Ames Research Center. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* 34 * PCI bus front-end for the Standard Microsystems Corp. 83C170 35 * Ethernet PCI Integrated Controller (EPIC/100) driver. 36 */ 37 38 #include <sys/cdefs.h> 39 __KERNEL_RCSID(0, "$NetBSD: if_epic_pci.c,v 1.41 2014/03/29 19:28:24 christos Exp $"); 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/mbuf.h> 44 #include <sys/malloc.h> 45 #include <sys/kernel.h> 46 #include <sys/socket.h> 47 #include <sys/ioctl.h> 48 #include <sys/errno.h> 49 #include <sys/device.h> 50 51 #include <net/if.h> 52 #include <net/if_dl.h> 53 #include <net/if_media.h> 54 #include <net/if_ether.h> 55 56 #include <sys/bus.h> 57 #include <sys/intr.h> 58 59 #include <dev/mii/miivar.h> 60 61 #include <dev/ic/smc83c170reg.h> 62 #include <dev/ic/smc83c170var.h> 63 64 #include <dev/pci/pcivar.h> 65 #include <dev/pci/pcireg.h> 66 #include <dev/pci/pcidevs.h> 67 68 /* 69 * PCI configuration space registers used by the EPIC. 70 */ 71 #define EPIC_PCI_IOBA PCI_BAR(0) /* i/o mapped base */ 72 #define EPIC_PCI_MMBA PCI_BAR(1) /* memory mapped base */ 73 74 struct epic_pci_softc { 75 struct epic_softc sc_epic; /* real EPIC softc */ 76 77 /* PCI-specific goo. */ 78 void *sc_ih; /* interrupt handle */ 79 }; 80 81 static int epic_pci_match(device_t, cfdata_t, void *); 82 static void epic_pci_attach(device_t, device_t, void *); 83 84 CFATTACH_DECL_NEW(epic_pci, sizeof(struct epic_pci_softc), 85 epic_pci_match, epic_pci_attach, NULL, NULL); 86 87 static const struct epic_pci_product { 88 uint32_t epp_prodid; /* PCI product ID */ 89 const char *epp_name; /* device name */ 90 } epic_pci_products[] = { 91 { PCI_PRODUCT_SMC_83C170, "SMC 83c170 Fast Ethernet" }, 92 { PCI_PRODUCT_SMC_83C175, "SMC 83c175 Fast Ethernet" }, 93 { 0, NULL }, 94 }; 95 96 static const struct epic_pci_product * 97 epic_pci_lookup(const struct pci_attach_args *pa) 98 { 99 const struct epic_pci_product *epp; 100 101 if (PCI_VENDOR(pa->pa_id) != PCI_VENDOR_SMC) 102 return NULL; 103 104 for (epp = epic_pci_products; epp->epp_name != NULL; epp++) 105 if (PCI_PRODUCT(pa->pa_id) == epp->epp_prodid) 106 return epp; 107 108 return NULL; 109 } 110 111 static const struct epic_pci_subsys_info { 112 pcireg_t subsysid; 113 int flags; 114 } epic_pci_subsys_info[] = { 115 { PCI_ID_CODE(PCI_VENDOR_SMC, 0xa015), /* SMC9432BTX */ 116 EPIC_HAS_BNC }, 117 { PCI_ID_CODE(PCI_VENDOR_SMC, 0xa024), /* SMC9432BTX1 */ 118 EPIC_HAS_BNC }, 119 { PCI_ID_CODE(PCI_VENDOR_SMC, 0xa016), /* SMC9432FTX */ 120 EPIC_HAS_MII_FIBER | EPIC_DUPLEXLED_ON_694 }, 121 { 0xffffffff, 122 0 } 123 }; 124 125 static const struct epic_pci_subsys_info * 126 epic_pci_subsys_lookup(const struct pci_attach_args *pa) 127 { 128 pci_chipset_tag_t pc = pa->pa_pc; 129 pcireg_t reg; 130 const struct epic_pci_subsys_info *esp; 131 132 reg = pci_conf_read(pc, pa->pa_tag, PCI_SUBSYS_ID_REG); 133 134 for (esp = epic_pci_subsys_info; esp->subsysid != 0xffffffff; esp++) 135 if (esp->subsysid == reg) 136 return esp; 137 138 return NULL; 139 } 140 141 static int 142 epic_pci_match(device_t parent, cfdata_t cf, void *aux) 143 { 144 struct pci_attach_args *pa = aux; 145 146 if (epic_pci_lookup(pa) != NULL) 147 return 1; 148 149 return 0; 150 } 151 152 static void 153 epic_pci_attach(device_t parent, device_t self, void *aux) 154 { 155 struct epic_pci_softc *psc = device_private(self); 156 struct epic_softc *sc = &psc->sc_epic; 157 struct pci_attach_args *pa = aux; 158 pci_chipset_tag_t pc = pa->pa_pc; 159 pci_intr_handle_t ih; 160 const char *intrstr = NULL; 161 const struct epic_pci_product *epp; 162 const struct epic_pci_subsys_info *esp; 163 bus_space_tag_t iot, memt; 164 bus_space_handle_t ioh, memh; 165 int ioh_valid, memh_valid; 166 int error; 167 char intrbuf[PCI_INTRSTR_LEN]; 168 169 sc->sc_dev = self; 170 171 epp = epic_pci_lookup(pa); 172 if (epp == NULL) { 173 aprint_normal("\n"); 174 panic("%s: impossible", __func__); 175 } 176 177 pci_aprint_devinfo_fancy(pa, "Ethernet controller", epp->epp_name, 1); 178 179 /* power up chip */ 180 if ((error = pci_activate(pa->pa_pc, pa->pa_tag, self, 181 NULL)) && error != EOPNOTSUPP) { 182 aprint_error_dev(self, "cannot activate %d\n", error); 183 return; 184 } 185 186 /* 187 * Map the device. 188 */ 189 ioh_valid = (pci_mapreg_map(pa, EPIC_PCI_IOBA, 190 PCI_MAPREG_TYPE_IO, 0, 191 &iot, &ioh, NULL, NULL) == 0); 192 memh_valid = (pci_mapreg_map(pa, EPIC_PCI_MMBA, 193 PCI_MAPREG_TYPE_MEM|PCI_MAPREG_MEM_TYPE_32BIT, 0, 194 &memt, &memh, NULL, NULL) == 0); 195 196 if (memh_valid) { 197 sc->sc_st = memt; 198 sc->sc_sh = memh; 199 } else if (ioh_valid) { 200 sc->sc_st = iot; 201 sc->sc_sh = ioh; 202 } else { 203 aprint_error_dev(self, "unable to map device registers\n"); 204 return; 205 } 206 207 sc->sc_dmat = pa->pa_dmat; 208 209 /* Make sure bus mastering is enabled. */ 210 pci_conf_write(pc, pa->pa_tag, PCI_COMMAND_STATUS_REG, 211 pci_conf_read(pc, pa->pa_tag, PCI_COMMAND_STATUS_REG) | 212 PCI_COMMAND_MASTER_ENABLE); 213 214 /* 215 * Map and establish our interrupt. 216 */ 217 if (pci_intr_map(pa, &ih)) { 218 aprint_error_dev(self, "unable to map interrupt\n"); 219 return; 220 } 221 intrstr = pci_intr_string(pc, ih, intrbuf, sizeof(intrbuf)); 222 psc->sc_ih = pci_intr_establish(pc, ih, IPL_NET, epic_intr, sc); 223 if (psc->sc_ih == NULL) { 224 aprint_error_dev(self, "unable to establish interrupt"); 225 if (intrstr != NULL) 226 aprint_error(" at %s", intrstr); 227 aprint_error("\n"); 228 return; 229 } 230 aprint_normal_dev(self, "interrupting at %s\n", intrstr); 231 232 esp = epic_pci_subsys_lookup(pa); 233 if (esp) 234 sc->sc_hwflags = esp->flags; 235 236 /* 237 * Finish off the attach. 238 */ 239 epic_attach(sc); 240 } 241