sys/dev/pci/if_rtw_pci.c

   1 /*      $NetBSD: if_rtw_pci.c,v 1.15 2009/09/16 16:34:50 dyoung Exp $   */
   2
   3 /*-
   4  * Copyright (c) 1998, 1999, 2000, 2002 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; Charles M. Hannum; and David Young.
  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 Realtek RTL8180 802.11 MAC/BBP chip.
  35  *
  36  * Derived from the ADMtek ADM8211 PCI bus front-end.
  37  *
  38  * Derived from the ``Tulip'' PCI bus front-end.
  39  */
  40
  41 #include <sys/cdefs.h>
  42 __KERNEL_RCSID(0, "$NetBSD: if_rtw_pci.c,v 1.15 2009/09/16 16:34:50 dyoung Exp $");
  43
  44 #include <sys/param.h>
  45 #include <sys/systm.h>
  46 #include <sys/mbuf.h>
  47 #include <sys/malloc.h>
  48 #include <sys/kernel.h>
  49 #include <sys/socket.h>
  50 #include <sys/ioctl.h>
  51 #include <sys/errno.h>
  52 #include <sys/device.h>
  53
  54 #include <machine/endian.h>
  55
  56 #include <net/if.h>
  57 #include <net/if_dl.h>
  58 #include <net/if_media.h>
  59 #include <net/if_ether.h>
  60
  61 #include <net80211/ieee80211_netbsd.h>
  62 #include <net80211/ieee80211_radiotap.h>
  63 #include <net80211/ieee80211_var.h>
  64
  65 #include <sys/bus.h>
  66 #include <sys/intr.h>
  67
  68 #include <dev/ic/rtwreg.h>
  69 #include <dev/ic/sa2400reg.h>
  70 #include <dev/ic/rtwvar.h>
  71
  72 #include <dev/pci/pcivar.h>
  73 #include <dev/pci/pcireg.h>
  74 #include <dev/pci/pcidevs.h>
  75
  76 /*
  77  * PCI configuration space registers used by the ADM8211.
  78  */
  79 #define RTW_PCI_IOBA            0x10    /* i/o mapped base */
  80 #define RTW_PCI_MMBA            0x14    /* memory mapped base */
  81
  82 struct rtw_pci_softc {
  83         struct rtw_softc        psc_rtw;        /* real ADM8211 softc */
  84
  85         pci_intr_handle_t       psc_ih;         /* interrupt handle */
  86         void                    *psc_intrcookie;
  87
  88         pci_chipset_tag_t       psc_pc;         /* our PCI chipset */
  89         pcitag_t                psc_pcitag;     /* our PCI tag */
  90 };
  91
  92 static int      rtw_pci_match(device_t, cfdata_t, void *);
  93 static void     rtw_pci_attach(device_t, device_t, void *);
  94 static int      rtw_pci_detach(device_t, int);
  95
  96 CFATTACH_DECL_NEW(rtw_pci, sizeof(struct rtw_pci_softc),
  97     rtw_pci_match, rtw_pci_attach, rtw_pci_detach, NULL);
  98
  99 static const struct rtw_pci_product {
 100         u_int32_t       app_vendor;     /* PCI vendor ID */
 101         u_int32_t       app_product;    /* PCI product ID */
 102         const char      *app_product_name;
 103 } rtw_pci_products[] = {
 104         { PCI_VENDOR_REALTEK,           PCI_PRODUCT_REALTEK_RT8180,
 105           "Realtek RTL8180 802.11 MAC/BBP" },
 106         { PCI_VENDOR_BELKIN,            PCI_PRODUCT_BELKIN_F5D6001,
 107           "Belkin F5D6001" },
 108
 109         { 0,                            0,                              NULL },
 110 };
 111
 112 static const struct rtw_pci_product *
 113 rtw_pci_lookup(const struct pci_attach_args *pa)
 114 {
 115         const struct rtw_pci_product *app;
 116
 117         for (app = rtw_pci_products;
 118              app->app_product_name != NULL;
 119              app++) {
 120                 if (PCI_VENDOR(pa->pa_id) == app->app_vendor &&
 121                     PCI_PRODUCT(pa->pa_id) == app->app_product)
 122                         return (app);
 123         }
 124         return (NULL);
 125 }
 126
 127 static int
 128 rtw_pci_match(device_t parent, cfdata_t match, void *aux)
 129 {
 130         struct pci_attach_args *pa = aux;
 131
 132         if (rtw_pci_lookup(pa) != NULL)
 133                 return (1);
 134
 135         return (0);
 136 }
 137
 138 static bool
 139 rtw_pci_resume(device_t self, pmf_qual_t qual)
 140 {
 141         struct rtw_pci_softc *psc = device_private(self);
 142         struct rtw_softc *sc = &psc->psc_rtw;
 143
 144         /* Establish the interrupt. */
 145         psc->psc_intrcookie = pci_intr_establish(psc->psc_pc, psc->psc_ih,
 146             IPL_NET, rtw_intr, sc);
 147         if (psc->psc_intrcookie == NULL) {
 148                 aprint_error_dev(sc->sc_dev, "unable to establish interrupt\n");
 149                 return false;
 150         }
 151
 152         return rtw_resume(self, qual);
 153 }
 154
 155 static bool
 156 rtw_pci_suspend(device_t self, pmf_qual_t qual)
 157 {
 158         struct rtw_pci_softc *psc = device_private(self);
 159
 160         if (!rtw_suspend(self, qual))
 161                 return false;
 162
 163         /* Unhook the interrupt handler. */
 164         pci_intr_disestablish(psc->psc_pc, psc->psc_intrcookie);
 165         psc->psc_intrcookie = NULL;
 166         return true;
 167 }
 168
 169 static void
 170 rtw_pci_attach(device_t parent, device_t self, void *aux)
 171 {
 172         struct rtw_pci_softc *psc = device_private(self);
 173         struct rtw_softc *sc = &psc->psc_rtw;
 174         struct rtw_regs *regs = &sc->sc_regs;
 175         struct pci_attach_args *pa = aux;
 176         pci_chipset_tag_t pc = pa->pa_pc;
 177         const char *intrstr = NULL;
 178         const struct rtw_pci_product *app;
 179         int error;
 180
 181         sc->sc_dev = self;
 182         psc->psc_pc = pa->pa_pc;
 183         psc->psc_pcitag = pa->pa_tag;
 184
 185         app = rtw_pci_lookup(pa);
 186         if (app == NULL) {
 187                 printf("\n");
 188                 panic("rtw_pci_attach: impossible");
 189         }
 190
 191         /*
 192          * Get revision info, and set some chip-specific variables.
 193          */
 194         sc->sc_rev = PCI_REVISION(pa->pa_class);
 195         aprint_normal(": %s, revision %d.%d\n", app->app_product_name,
 196             (sc->sc_rev >> 4) & 0xf, sc->sc_rev & 0xf);
 197
 198         /* power up chip */
 199         if ((error = pci_activate(pa->pa_pc, pa->pa_tag, self, NULL)) != 0 &&
 200             error != EOPNOTSUPP) {
 201                 aprint_error_dev(self, "cannot activate %d\n", error);
 202                 return;
 203         }
 204
 205         /*
 206          * Map the device.
 207          */
 208         if (pci_mapreg_map(pa, RTW_PCI_MMBA,
 209             PCI_MAPREG_TYPE_MEM|PCI_MAPREG_MEM_TYPE_32BIT, 0,
 210             &regs->r_bt, &regs->r_bh, NULL, &regs->r_sz) == 0)
 211                 ;
 212         else if (pci_mapreg_map(pa, RTW_PCI_IOBA, PCI_MAPREG_TYPE_IO, 0,
 213             &regs->r_bt, &regs->r_bh, NULL, &regs->r_sz) == 0)
 214                 ;
 215         else {
 216                 aprint_error_dev(self, "unable to map device registers\n");
 217                 return;
 218         }
 219
 220         sc->sc_dmat = pa->pa_dmat;
 221
 222         /*
 223          * Make sure bus mastering is enabled.
 224          */
 225         pci_conf_write(pc, pa->pa_tag, PCI_COMMAND_STATUS_REG,
 226             pci_conf_read(pc, pa->pa_tag, PCI_COMMAND_STATUS_REG) |
 227             PCI_COMMAND_MASTER_ENABLE);
 228
 229         /*
 230          * Map and establish our interrupt.
 231          */
 232         if (pci_intr_map(pa, &psc->psc_ih)) {
 233                 aprint_error_dev(self, "unable to map interrupt\n");
 234                 return;
 235         }
 236         intrstr = pci_intr_string(pc, psc->psc_ih);
 237         psc->psc_intrcookie = pci_intr_establish(pc, psc->psc_ih, IPL_NET,
 238             rtw_intr, sc);
 239         if (psc->psc_intrcookie == NULL) {
 240                 aprint_error_dev(self, "unable to establish interrupt");
 241                 if (intrstr != NULL)
 242                         aprint_error(" at %s", intrstr);
 243                 aprint_error("\n");
 244                 return;
 245         }
 246
 247         aprint_normal_dev(self, "interrupting at %s\n", intrstr);
 248
 249         /*
 250          * Finish off the attach.
 251          */
 252         rtw_attach(sc);
 253
 254         if (pmf_device_register(sc->sc_dev, rtw_pci_suspend, rtw_pci_resume)) {
 255                 pmf_class_network_register(self, &sc->sc_if);
 256                 /*
 257                  * Power down the socket.
 258                  */
 259                 pmf_device_suspend(sc->sc_dev, &sc->sc_qual);
 260         } else
 261                 aprint_error_dev(sc->sc_dev,
 262                     "couldn't establish power handler\n");
 263 }
 264
 265 static int
 266 rtw_pci_detach(device_t self, int flags)
 267 {
 268         struct rtw_pci_softc *psc = device_private(self);
 269         struct rtw_softc *sc = &psc->psc_rtw;
 270         struct rtw_regs *regs = &sc->sc_regs;
 271         int rc;
 272
 273         if ((rc = rtw_detach(sc)) != 0)
 274                 return rc;
 275         if (psc->psc_intrcookie != NULL)
 276                 pci_intr_disestablish(psc->psc_pc, psc->psc_intrcookie);
 277         bus_space_unmap(regs->r_bt, regs->r_bh, regs->r_sz);
 278
 279         return 0;
 280 }