1 /* $OpenBSD: if_bwi_pci.c,v 1.17 2019/05/10 16:44:36 bcook Exp $ */ 2 3 /* 4 * Copyright (c) 2007 Marcus Glocker <mglocker@openbsd.org> 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 /* 20 * PCI front-end for the Broadcom AirForce 21 */ 22 23 #include "bpfilter.h" 24 25 #include <sys/param.h> 26 #include <sys/sockio.h> 27 #include <sys/mbuf.h> 28 #include <sys/kernel.h> 29 #include <sys/socket.h> 30 #include <sys/systm.h> 31 #include <sys/malloc.h> 32 #include <sys/timeout.h> 33 #include <sys/device.h> 34 35 #include <machine/bus.h> 36 37 #include <net/if.h> 38 #include <net/if_media.h> 39 40 #include <netinet/in.h> 41 #include <netinet/if_ether.h> 42 43 #include <net80211/ieee80211_var.h> 44 #include <net80211/ieee80211_amrr.h> 45 #include <net80211/ieee80211_radiotap.h> 46 47 #include <dev/ic/bwivar.h> 48 #include <dev/ic/bwireg.h> 49 50 #include <dev/pci/pcireg.h> 51 #include <dev/pci/pcivar.h> 52 #include <dev/pci/pcidevs.h> 53 54 /* Base Address Register */ 55 #define BWI_PCI_BAR0 0x10 56 57 int bwi_pci_match(struct device *, void *, void *); 58 void bwi_pci_attach(struct device *, struct device *, void *); 59 int bwi_pci_detach(struct device *, int); 60 void bwi_pci_conf_write(void *, uint32_t, uint32_t); 61 uint32_t bwi_pci_conf_read(void *, uint32_t); 62 int bwi_pci_activate(struct device *, int); 63 void bwi_pci_wakeup(struct bwi_softc *); 64 65 struct bwi_pci_softc { 66 struct bwi_softc psc_bwi; 67 68 pci_chipset_tag_t psc_pc; 69 pcitag_t psc_pcitag; 70 void *psc_ih; 71 72 bus_size_t psc_mapsize; 73 }; 74 75 struct cfattach bwi_pci_ca = { 76 sizeof(struct bwi_pci_softc), bwi_pci_match, bwi_pci_attach, 77 bwi_pci_detach, bwi_pci_activate 78 }; 79 80 const struct pci_matchid bwi_pci_devices[] = { 81 { PCI_VENDOR_BROADCOM, PCI_PRODUCT_BROADCOM_BCM4303 }, 82 { PCI_VENDOR_BROADCOM, PCI_PRODUCT_BROADCOM_BCM4306 }, 83 { PCI_VENDOR_BROADCOM, PCI_PRODUCT_BROADCOM_BCM4306_2 }, 84 { PCI_VENDOR_BROADCOM, PCI_PRODUCT_BROADCOM_BCM4307 }, 85 { PCI_VENDOR_BROADCOM, PCI_PRODUCT_BROADCOM_BCM4309 }, 86 { PCI_VENDOR_BROADCOM, PCI_PRODUCT_BROADCOM_BCM4311 }, 87 { PCI_VENDOR_BROADCOM, PCI_PRODUCT_BROADCOM_BCM4312 }, 88 { PCI_VENDOR_BROADCOM, PCI_PRODUCT_BROADCOM_BCM4318 }, 89 { PCI_VENDOR_BROADCOM, PCI_PRODUCT_BROADCOM_BCM4319 }, 90 { PCI_VENDOR_BROADCOM, PCI_PRODUCT_BROADCOM_BCM43XG }, 91 { PCI_VENDOR_BROADCOM, PCI_PRODUCT_BROADCOM_BCM4331 }, 92 }; 93 94 int 95 bwi_pci_match(struct device *parent, void *match, void *aux) 96 { 97 struct pci_attach_args *pa = aux; 98 99 /* 100 * The second revision of the BCM4311/BCM4312 101 * chips require v4 firmware. 102 */ 103 if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_BROADCOM && 104 (PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_BROADCOM_BCM4311 || 105 PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_BROADCOM_BCM4312) && 106 PCI_REVISION(pa->pa_class) == 0x02) 107 return (0); 108 109 return (pci_matchbyid((struct pci_attach_args *)aux, bwi_pci_devices, 110 sizeof(bwi_pci_devices) / sizeof(bwi_pci_devices[0]))); 111 } 112 113 void 114 bwi_reset_bcm4331(struct bwi_softc *sc) 115 { 116 int i; 117 118 /* 119 * The BCM4331 is not actually supported by this driver, but buggy EFI 120 * revisions in 2011-2012 Macs leave this chip enabled by default, 121 * causing it to emit spurious interrupts when the shared interrupt 122 * line is enabled. 123 */ 124 for (i = 0; CSR_READ_4(sc, BWI_RESET_STATUS) && i < 30; i++) 125 delay(10); 126 127 CSR_WRITE_4(sc, BWI_RESET_CTRL, BWI_RESET_CTRL_RESET); 128 CSR_READ_4(sc, BWI_RESET_CTRL); 129 delay(1); 130 CSR_WRITE_4(sc, BWI_RESET_CTRL, 0); 131 CSR_READ_4(sc, BWI_RESET_CTRL); 132 delay(10); 133 } 134 135 void 136 bwi_pci_attach(struct device *parent, struct device *self, void *aux) 137 { 138 struct bwi_pci_softc *psc = (struct bwi_pci_softc *)self; 139 struct pci_attach_args *pa = aux; 140 struct bwi_softc *sc = &psc->psc_bwi; 141 const char *intrstr = NULL; 142 pci_intr_handle_t ih; 143 pcireg_t memtype, reg; 144 145 sc->sc_dmat = pa->pa_dmat; 146 psc->psc_pc = pa->pa_pc; 147 psc->psc_pcitag = pa->pa_tag; 148 149 /* map control / status registers */ 150 memtype = pci_mapreg_type(pa->pa_pc, pa->pa_tag, BWI_PCI_BAR0); 151 if (pci_mapreg_map(pa, BWI_PCI_BAR0, memtype, 0, &sc->sc_mem_bt, 152 &sc->sc_mem_bh, NULL, &psc->psc_mapsize, 0)) { 153 printf(": can't map mem space\n"); 154 return; 155 } 156 157 /* we need to access PCI config space from the driver */ 158 sc->sc_conf_write = bwi_pci_conf_write; 159 sc->sc_conf_read = bwi_pci_conf_read; 160 161 reg = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_SUBSYS_ID_REG); 162 163 sc->sc_pci_revid = PCI_REVISION(pa->pa_class); 164 sc->sc_pci_did = PCI_PRODUCT(pa->pa_id); 165 sc->sc_pci_subvid = PCI_VENDOR(reg); 166 sc->sc_pci_subdid = PCI_PRODUCT(reg); 167 168 if (sc->sc_pci_did == PCI_PRODUCT_BROADCOM_BCM4331) { 169 printf(": disabling\n"); 170 bwi_reset_bcm4331(sc); 171 bus_space_unmap(sc->sc_mem_bt, sc->sc_mem_bh, psc->psc_mapsize); 172 return; 173 } 174 175 /* map interrupt */ 176 if (pci_intr_map(pa, &ih) != 0) { 177 printf(": can't map interrupt\n"); 178 return; 179 } 180 181 /* establish interrupt */ 182 intrstr = pci_intr_string(psc->psc_pc, ih); 183 psc->psc_ih = pci_intr_establish(psc->psc_pc, ih, IPL_NET, bwi_intr, sc, 184 sc->sc_dev.dv_xname); 185 if (psc->psc_ih == NULL) { 186 printf(": can't establish interrupt"); 187 if (intrstr != NULL) 188 printf(" at %s", intrstr); 189 printf("\n"); 190 return; 191 } 192 printf(": %s", intrstr); 193 194 bwi_attach(sc); 195 } 196 197 int 198 bwi_pci_detach(struct device *self, int flags) 199 { 200 struct bwi_pci_softc *psc = (struct bwi_pci_softc *)self; 201 struct bwi_softc *sc = &psc->psc_bwi; 202 203 bwi_detach(sc); 204 pci_intr_disestablish(psc->psc_pc, psc->psc_ih); 205 206 return (0); 207 } 208 209 int 210 bwi_pci_activate(struct device *self, int act) 211 { 212 struct bwi_pci_softc *psc = (struct bwi_pci_softc *)self; 213 struct bwi_softc *sc = &psc->psc_bwi; 214 struct ifnet *ifp = &sc->sc_ic.ic_if; 215 216 switch (act) { 217 case DVACT_SUSPEND: 218 if (ifp->if_flags & IFF_RUNNING) 219 bwi_stop(sc, 1); 220 break; 221 case DVACT_WAKEUP: 222 bwi_pci_wakeup(sc); 223 break; 224 } 225 226 return (0); 227 } 228 229 void 230 bwi_pci_wakeup(struct bwi_softc *sc) 231 { 232 struct ifnet *ifp = &sc->sc_ic.ic_if; 233 234 if (ifp->if_flags & IFF_UP) 235 bwi_init(ifp); 236 } 237 238 void 239 bwi_pci_conf_write(void *self, uint32_t reg, uint32_t val) 240 { 241 struct bwi_pci_softc *psc = (struct bwi_pci_softc *)self; 242 243 pci_conf_write(psc->psc_pc, psc->psc_pcitag, reg, val); 244 } 245 246 uint32_t 247 bwi_pci_conf_read(void *self, uint32_t reg) 248 { 249 struct bwi_pci_softc *psc = (struct bwi_pci_softc *)self; 250 251 return (pci_conf_read(psc->psc_pc, psc->psc_pcitag, reg)); 252 } 253