1 /* $NetBSD: if_epic_pci.c,v 1.18 2001/07/08 18:02:28 thorpej 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 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the NetBSD 22 * Foundation, Inc. and its contributors. 23 * 4. Neither the name of The NetBSD Foundation nor the names of its 24 * contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40 /* 41 * PCI bus front-end for the Standard Microsystems Corp. 83C170 42 * Ethernet PCI Integrated Controller (EPIC/100) driver. 43 */ 44 45 #include <sys/param.h> 46 #include <sys/systm.h> 47 #include <sys/mbuf.h> 48 #include <sys/malloc.h> 49 #include <sys/kernel.h> 50 #include <sys/socket.h> 51 #include <sys/ioctl.h> 52 #include <sys/errno.h> 53 #include <sys/device.h> 54 55 #include <net/if.h> 56 #include <net/if_dl.h> 57 #include <net/if_media.h> 58 #include <net/if_ether.h> 59 60 #include <machine/bus.h> 61 #include <machine/intr.h> 62 63 #include <dev/mii/miivar.h> 64 65 #include <dev/ic/smc83c170reg.h> 66 #include <dev/ic/smc83c170var.h> 67 68 #include <dev/pci/pcivar.h> 69 #include <dev/pci/pcireg.h> 70 #include <dev/pci/pcidevs.h> 71 72 /* 73 * PCI configuration space registers used by the EPIC. 74 */ 75 #define EPIC_PCI_IOBA 0x10 /* i/o mapped base */ 76 #define EPIC_PCI_MMBA 0x14 /* memory mapped base */ 77 78 struct epic_pci_softc { 79 struct epic_softc sc_epic; /* real EPIC softc */ 80 81 /* PCI-specific goo. */ 82 void *sc_ih; /* interrupt handle */ 83 }; 84 85 int epic_pci_match(struct device *, struct cfdata *, void *); 86 void epic_pci_attach(struct device *, struct device *, void *); 87 88 struct cfattach epic_pci_ca = { 89 sizeof(struct epic_pci_softc), epic_pci_match, epic_pci_attach, 90 }; 91 92 const struct epic_pci_product { 93 u_int32_t epp_prodid; /* PCI product ID */ 94 const char *epp_name; /* device name */ 95 } epic_pci_products[] = { 96 { PCI_PRODUCT_SMC_83C170, "SMC 83c170 Fast Ethernet" }, 97 { PCI_PRODUCT_SMC_83C175, "SMC 83c175 Fast Ethernet" }, 98 { 0, NULL }, 99 }; 100 101 const struct epic_pci_product *epic_pci_lookup(const struct pci_attach_args *); 102 103 const struct epic_pci_product * 104 epic_pci_lookup(pa) 105 const struct pci_attach_args *pa; 106 { 107 const struct epic_pci_product *epp; 108 109 if (PCI_VENDOR(pa->pa_id) != PCI_VENDOR_SMC) 110 return (NULL); 111 112 for (epp = epic_pci_products; epp->epp_name != NULL; epp++) 113 if (PCI_PRODUCT(pa->pa_id) == epp->epp_prodid) 114 return (epp); 115 116 return (NULL); 117 } 118 119 const struct epic_pci_subsys_info { 120 pcireg_t subsysid; 121 int flags; 122 } epic_pci_subsys_info[] = { 123 { PCI_ID_CODE(PCI_VENDOR_SMC, 0xa024), /* SMC9432BTX1 */ 124 EPIC_HAS_BNC }, 125 { PCI_ID_CODE(PCI_VENDOR_SMC, 0xa016), /* SMC9432FTX */ 126 EPIC_HAS_MII_FIBER | EPIC_DUPLEXLED_ON_694 }, 127 { 0xffffffff, 128 0 } 129 }; 130 131 const struct epic_pci_subsys_info * 132 epic_pci_subsys_lookup(const struct pci_attach_args *); 133 134 const struct epic_pci_subsys_info * 135 epic_pci_subsys_lookup(pa) 136 const struct pci_attach_args *pa; 137 { 138 pci_chipset_tag_t pc = pa->pa_pc; 139 pcireg_t reg; 140 const struct epic_pci_subsys_info *esp; 141 142 reg = pci_conf_read(pc, pa->pa_tag, PCI_SUBSYS_ID_REG); 143 144 for (esp = epic_pci_subsys_info; esp->subsysid != 0xffffffff; esp++) 145 if (esp->subsysid == reg) 146 return (esp); 147 148 return (NULL); 149 } 150 151 int 152 epic_pci_match(parent, match, aux) 153 struct device *parent; 154 struct cfdata *match; 155 void *aux; 156 { 157 struct pci_attach_args *pa = aux; 158 159 if (epic_pci_lookup(pa) != NULL) 160 return (1); 161 162 return (0); 163 } 164 165 void 166 epic_pci_attach(parent, self, aux) 167 struct device *parent, *self; 168 void *aux; 169 { 170 struct epic_pci_softc *psc = (struct epic_pci_softc *)self; 171 struct epic_softc *sc = &psc->sc_epic; 172 struct pci_attach_args *pa = aux; 173 pci_chipset_tag_t pc = pa->pa_pc; 174 pci_intr_handle_t ih; 175 const char *intrstr = NULL; 176 const struct epic_pci_product *epp; 177 const struct epic_pci_subsys_info *esp; 178 bus_space_tag_t iot, memt; 179 bus_space_handle_t ioh, memh; 180 pcireg_t reg; 181 int pmreg, ioh_valid, memh_valid; 182 183 if (pci_get_capability(pc, pa->pa_tag, PCI_CAP_PWRMGMT, &pmreg, 0)) { 184 reg = pci_conf_read(pc, pa->pa_tag, pmreg + 4); 185 switch (reg & PCI_PMCSR_STATE_MASK) { 186 case PCI_PMCSR_STATE_D1: 187 case PCI_PMCSR_STATE_D2: 188 printf(": waking up from power state D%d\n%s", 189 reg & PCI_PMCSR_STATE_MASK, sc->sc_dev.dv_xname); 190 pci_conf_write(pc, pa->pa_tag, pmreg + 4, 191 (reg & ~PCI_PMCSR_STATE_MASK) | 192 PCI_PMCSR_STATE_D0); 193 break; 194 case PCI_PMCSR_STATE_D3: 195 /* 196 * IO and MEM are disabled. We can't enable 197 * the card because the BARs might be invalid. 198 */ 199 printf(": unable to wake up from power state D3, " 200 "reboot required.\n"); 201 pci_conf_write(pc, pa->pa_tag, pmreg + 4, 202 (reg & ~PCI_PMCSR_STATE_MASK) | 203 PCI_PMCSR_STATE_D0); 204 return; 205 } 206 } 207 208 /* 209 * Map the device. 210 */ 211 ioh_valid = (pci_mapreg_map(pa, EPIC_PCI_IOBA, 212 PCI_MAPREG_TYPE_IO, 0, 213 &iot, &ioh, NULL, NULL) == 0); 214 memh_valid = (pci_mapreg_map(pa, EPIC_PCI_MMBA, 215 PCI_MAPREG_TYPE_MEM|PCI_MAPREG_MEM_TYPE_32BIT, 0, 216 &memt, &memh, NULL, NULL) == 0); 217 218 if (memh_valid) { 219 sc->sc_st = memt; 220 sc->sc_sh = memh; 221 } else if (ioh_valid) { 222 sc->sc_st = iot; 223 sc->sc_sh = ioh; 224 } else { 225 printf(": unable to map device registers\n"); 226 return; 227 } 228 229 sc->sc_dmat = pa->pa_dmat; 230 231 epp = epic_pci_lookup(pa); 232 if (epp == NULL) { 233 printf("\n"); 234 panic("epic_pci_attach: impossible"); 235 } 236 237 printf(": %s, rev. %d\n", epp->epp_name, PCI_REVISION(pa->pa_class)); 238 239 /* Make sure bus mastering is enabled. */ 240 pci_conf_write(pc, pa->pa_tag, PCI_COMMAND_STATUS_REG, 241 pci_conf_read(pc, pa->pa_tag, PCI_COMMAND_STATUS_REG) | 242 PCI_COMMAND_MASTER_ENABLE); 243 244 /* 245 * Map and establish our interrupt. 246 */ 247 if (pci_intr_map(pa, &ih)) { 248 printf("%s: unable to map interrupt\n", sc->sc_dev.dv_xname); 249 return; 250 } 251 intrstr = pci_intr_string(pc, ih); 252 psc->sc_ih = pci_intr_establish(pc, ih, IPL_NET, epic_intr, sc); 253 if (psc->sc_ih == NULL) { 254 printf("%s: unable to establish interrupt", 255 sc->sc_dev.dv_xname); 256 if (intrstr != NULL) 257 printf(" at %s", intrstr); 258 printf("\n"); 259 return; 260 } 261 printf("%s: interrupting at %s\n", sc->sc_dev.dv_xname, intrstr); 262 263 esp = epic_pci_subsys_lookup(pa); 264 if (esp) 265 sc->sc_hwflags = esp->flags; 266 267 /* 268 * Finish off the attach. 269 */ 270 epic_attach(sc); 271 } 272