sys/dev/pci/if_bwi_pci.c

   1 /*      $NetBSD: if_bwi_pci.c,v 1.7 2009/04/26 10:26:54 cegger Exp $    */
   2 /*      $OpenBSD: if_bwi_pci.c,v 1.6 2008/02/14 22:10:02 brad Exp $ */
   3
   4 /*
   5  * Copyright (c) 2007 Marcus Glocker <mglocker@openbsd.org>
   6  *
   7  * Permission to use, copy, modify, and distribute this software for any
   8  * purpose with or without fee is hereby granted, provided that the above
   9  * copyright notice and this permission notice appear in all copies.
  10  *
  11  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  12  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  13  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  14  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  15  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  16  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  17  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  18  */
  19
  20 /*
  21  * Broadcom AirForce BCM43xx IEEE 802.11b/g wireless network driver
  22  * PCI front end
  23  */
  24
  25 #include "bpfilter.h"
  26
  27 #include <sys/cdefs.h>
  28 __KERNEL_RCSID(0, "$NetBSD: if_bwi_pci.c,v 1.7 2009/04/26 10:26:54 cegger Exp $");
  29
  30 #include <sys/param.h>
  31 #include <sys/callout.h>
  32 #include <sys/device.h>
  33 #include <sys/kernel.h>
  34 #include <sys/malloc.h>
  35 #include <sys/mbuf.h>
  36 #include <sys/socket.h>
  37 #include <sys/sockio.h>
  38 #include <sys/systm.h>
  39
  40 #include <machine/bus.h>
  41
  42 #include <net/if.h>
  43 #include <net/if_dl.h>
  44 #include <net/if_ether.h>
  45 #include <net/if_media.h>
  46
  47 #include <net80211/ieee80211_var.h>
  48 #include <net80211/ieee80211_amrr.h>
  49 #include <net80211/ieee80211_radiotap.h>
  50
  51 #include <dev/ic/bwivar.h>
  52
  53 #include <dev/pci/pcireg.h>
  54 #include <dev/pci/pcivar.h>
  55 #include <dev/pci/pcidevs.h>
  56
  57 /* Base Address Register */
  58 #define BWI_PCI_BAR0    0x10
  59
  60 static int      bwi_pci_match(device_t, cfdata_t, void *);
  61 static void     bwi_pci_attach(device_t, device_t, void *);
  62 static int      bwi_pci_detach(device_t, int);
  63 static void     bwi_pci_conf_write(void *, uint32_t, uint32_t);
  64 static uint32_t bwi_pci_conf_read(void *, uint32_t);
  65
  66 struct bwi_pci_softc {
  67         struct bwi_softc         psc_bwi;
  68
  69         pci_chipset_tag_t        psc_pc;
  70         pcitag_t                 psc_pcitag;
  71
  72         bus_size_t               psc_mapsize;
  73 };
  74
  75 CFATTACH_DECL_NEW(bwi_pci, sizeof(struct bwi_pci_softc),
  76     bwi_pci_match, bwi_pci_attach, bwi_pci_detach, NULL);
  77
  78 static int
  79 bwi_pci_match(device_t parent, cfdata_t match, void *aux)
  80 {
  81         struct pci_attach_args *pa = aux;
  82
  83         if (PCI_VENDOR(pa->pa_id) != PCI_VENDOR_BROADCOM)
  84                 return (0);
  85
  86         switch (PCI_PRODUCT(pa->pa_id)) {
  87         case PCI_PRODUCT_BROADCOM_BCM4303:
  88         case PCI_PRODUCT_BROADCOM_BCM4306:
  89         case PCI_PRODUCT_BROADCOM_BCM4306_2:
  90         case PCI_PRODUCT_BROADCOM_BCM4307:
  91         case PCI_PRODUCT_BROADCOM_BCM4309:
  92         case PCI_PRODUCT_BROADCOM_BCM4311:
  93         case PCI_PRODUCT_BROADCOM_BCM4312:
  94         case PCI_PRODUCT_BROADCOM_BCM4318:
  95         case PCI_PRODUCT_BROADCOM_BCM4319:
  96         case PCI_PRODUCT_BROADCOM_BCM4322:
  97         case PCI_PRODUCT_BROADCOM_BCM43XG:
  98         case PCI_PRODUCT_BROADCOM_BCM4328:
  99                 return (1);
 100         }
 101
 102         return (0);
 103 }
 104
 105 static void
 106 bwi_pci_attach(device_t parent, device_t self, void *aux)
 107 {
 108         struct bwi_pci_softc *psc = device_private(self);
 109         struct pci_attach_args *pa = aux;
 110         struct bwi_softc *sc = &psc->psc_bwi;
 111         const char *intrstr = NULL;
 112         pci_intr_handle_t ih;
 113         pcireg_t memtype, reg;
 114         int error = 0;
 115
 116         aprint_naive("\n");
 117         aprint_normal(": Broadcom Wireless");
 118
 119         sc->sc_dev = self;
 120         sc->sc_dmat = pa->pa_dmat;
 121         psc->psc_pc = pa->pa_pc;
 122         psc->psc_pcitag = pa->pa_tag;
 123
 124         /* map control / status registers */
 125         memtype = pci_mapreg_type(pa->pa_pc, pa->pa_tag, BWI_PCI_BAR0);
 126         switch (memtype) {
 127         case PCI_MAPREG_TYPE_MEM | PCI_MAPREG_MEM_TYPE_32BIT:
 128         case PCI_MAPREG_TYPE_MEM | PCI_MAPREG_MEM_TYPE_64BIT:
 129                 break;
 130         default:
 131                 aprint_error_dev(self, "invalid base address register\n");
 132                 return;
 133         }
 134
 135         if (pci_mapreg_map(pa, BWI_PCI_BAR0,
 136             memtype, 0, &sc->sc_mem_bt, &sc->sc_mem_bh,
 137             NULL, &psc->psc_mapsize) != 0)
 138         {
 139                 aprint_error_dev(self, "could not map mem space\n");
 140                 return;
 141         }
 142
 143         /* map interrupt */
 144         if (pci_intr_map(pa, &ih) != 0) {
 145                 aprint_error_dev(self, "could not map interrupt\n");
 146                 goto fail;
 147         }
 148
 149         /* establish interrupt */
 150         intrstr = pci_intr_string(psc->psc_pc, ih);
 151         sc->sc_ih = pci_intr_establish(psc->psc_pc, ih, IPL_NET, bwi_intr, sc);
 152         if (sc->sc_ih == NULL) {
 153                 aprint_error_dev(self, "could not establish interrupt");
 154                 if (intrstr != NULL)
 155                         aprint_error(" at %s", intrstr);
 156                 aprint_error("\n");
 157                 goto fail;
 158         }
 159         aprint_normal_dev(self, "interrupting at %s\n", intrstr);
 160
 161         /* we need to access PCI config space from the driver */
 162         sc->sc_conf_write = bwi_pci_conf_write;
 163         sc->sc_conf_read = bwi_pci_conf_read;
 164
 165         reg = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_SUBSYS_ID_REG);
 166
 167         sc->sc_pci_revid = PCI_REVISION(pa->pa_class);
 168         sc->sc_pci_did = PCI_PRODUCT(pa->pa_id);
 169         sc->sc_pci_subvid = PCI_VENDOR(reg);
 170         sc->sc_pci_subdid = PCI_PRODUCT(reg);
 171
 172         if (!pmf_device_register(self, bwi_suspend, bwi_resume))
 173                 aprint_error_dev(self, "couldn't establish power handler\n");
 174
 175         error = bwi_attach(sc);
 176         if (error)
 177                 goto fail;
 178         return;
 179
 180 fail:
 181         if (sc->sc_ih) {
 182                 pci_intr_disestablish(psc->psc_pc, sc->sc_ih);
 183                 sc->sc_ih = NULL;
 184         }
 185         if (psc->psc_mapsize) {
 186                 bus_space_unmap(sc->sc_mem_bt, sc->sc_mem_bh, psc->psc_mapsize);
 187                 psc->psc_mapsize = 0;
 188         }
 189         return;
 190 }
 191
 192 int
 193 bwi_pci_detach(device_t self, int flags)
 194 {
 195         struct bwi_pci_softc *psc = device_private(self);
 196         struct bwi_softc *sc = &psc->psc_bwi;
 197
 198         pmf_device_deregister(self);
 199
 200         bwi_detach(sc);
 201
 202         if (sc->sc_ih != NULL) {
 203                 pci_intr_disestablish(psc->psc_pc, sc->sc_ih);
 204                 sc->sc_ih = NULL;
 205         }
 206
 207         return (0);
 208 }
 209
 210 static void
 211 bwi_pci_conf_write(void *sc, uint32_t reg, uint32_t val)
 212 {
 213         struct bwi_pci_softc *psc = (struct bwi_pci_softc *)sc;
 214
 215         pci_conf_write(psc->psc_pc, psc->psc_pcitag, reg, val);
 216 }
 217
 218 static uint32_t
 219 bwi_pci_conf_read(void *sc, uint32_t reg)
 220 {
 221         struct bwi_pci_softc *psc = (struct bwi_pci_softc *)sc;
 222
 223         return (pci_conf_read(psc->psc_pc, psc->psc_pcitag, reg));
 224 }