if_atw_pci.c

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    1 /*      $NetBSD: if_atw_pci.c,v 1.6 2004/02/17 21:20:55 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  * 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 ADMtek ADM8211 802.11 MAC/BBP chip.
   42  *
   43  * Derived from the ``Tulip'' PCI bus front-end.
   44  */
   45 
   46 #include <sys/cdefs.h>
   47 __KERNEL_RCSID(0, "$NetBSD: if_atw_pci.c,v 1.6 2004/02/17 21:20:55 dyoung Exp $");
   48 
   49 #include <sys/param.h>
   50 #include <sys/systm.h> 
   51 #include <sys/mbuf.h>   
   52 #include <sys/malloc.h>
   53 #include <sys/kernel.h>
   54 #include <sys/socket.h>
   55 #include <sys/ioctl.h>
   56 #include <sys/errno.h>
   57 #include <sys/device.h>
   58 
   59 #include <machine/endian.h>
   60  
   61 #include <net/if.h>
   62 #include <net/if_dl.h>
   63 #include <net/if_media.h>
   64 #include <net/if_ether.h>
   65 
   66 #include <net80211/ieee80211_compat.h>
   67 #include <net80211/ieee80211_radiotap.h>
   68 #include <net80211/ieee80211_var.h>
   69 
   70 #include <machine/bus.h>
   71 #include <machine/intr.h>
   72 
   73 #include <dev/ic/atwreg.h>
   74 #include <dev/ic/rf3000reg.h>
   75 #include <dev/ic/si4136reg.h>
   76 #include <dev/ic/atwvar.h>
   77 
   78 #include <dev/pci/pcivar.h>
   79 #include <dev/pci/pcireg.h>
   80 #include <dev/pci/pcidevs.h>
   81 
   82 /*
   83  * PCI configuration space registers used by the ADM8211.
   84  */
   85 #define ATW_PCI_IOBA            0x10    /* i/o mapped base */
   86 #define ATW_PCI_MMBA            0x14    /* memory mapped base */
   87 
   88 struct atw_pci_softc {
   89         struct atw_softc        psc_atw;        /* real ADM8211 softc */
   90 
   91         pci_intr_handle_t       psc_ih;         /* interrupt handle */
   92         void                    *psc_intrcookie;
   93 
   94         pci_chipset_tag_t       psc_pc;         /* our PCI chipset */
   95         pcitag_t                psc_pcitag;     /* our PCI tag */
   96 };
   97 
   98 int     atw_pci_match(struct device *, struct cfdata *, void *);
   99 void    atw_pci_attach(struct device *, struct device *, void *);
  100 
  101 CFATTACH_DECL(atw_pci, sizeof(struct atw_pci_softc),
  102     atw_pci_match, atw_pci_attach, NULL, NULL);
  103 
  104 const struct atw_pci_product {
  105         u_int32_t       app_vendor;     /* PCI vendor ID */
  106         u_int32_t       app_product;    /* PCI product ID */
  107         const char      *app_product_name;
  108 } atw_pci_products[] = {
  109         { PCI_VENDOR_ADMTEK,            PCI_PRODUCT_ADMTEK_ADM8211,
  110           "ADMtek ADM8211 802.11 MAC/BBP" },
  111 
  112         { 0,                            0,                              NULL },
  113 };
  114 
  115 const struct atw_pci_product *atw_pci_lookup(const struct pci_attach_args *);
  116 
  117 const struct atw_pci_product *
  118 atw_pci_lookup(const struct pci_attach_args *pa)
  119 {
  120         const struct atw_pci_product *app;
  121 
  122         for (app = atw_pci_products;
  123              app->app_product_name != NULL;
  124              app++) {
  125                 if (PCI_VENDOR(pa->pa_id) == app->app_vendor &&
  126                     PCI_PRODUCT(pa->pa_id) == app->app_product)
  127                         return (app);
  128         }
  129         return (NULL);
  130 }
  131 
  132 int
  133 atw_pci_match(struct device *parent, struct cfdata *match, void *aux)
  134 {
  135         struct pci_attach_args *pa = aux;
  136 
  137         if (atw_pci_lookup(pa) != NULL)
  138                 return (1);
  139 
  140         return (0);
  141 }
  142 
  143 static int
  144 atw_pci_enable(struct atw_softc *sc)
  145 {
  146         struct atw_pci_softc *psc = (void *)sc;
  147 
  148         /* Establish the interrupt. */
  149         psc->psc_intrcookie = pci_intr_establish(psc->psc_pc, psc->psc_ih,
  150             IPL_NET, atw_intr, sc);
  151         if (psc->psc_intrcookie == NULL) {
  152                 printf("%s: unable to establish interrupt\n",
  153                     sc->sc_dev.dv_xname);
  154                 return (1);
  155         }
  156 
  157         return (0);
  158 }
  159 
  160 static void
  161 atw_pci_disable(struct atw_softc *sc)
  162 {
  163         struct atw_pci_softc *psc = (void *)sc;
  164 
  165         /* Unhook the interrupt handler. */
  166         pci_intr_disestablish(psc->psc_pc, psc->psc_intrcookie);
  167         psc->psc_intrcookie = NULL;
  168 }
  169 
  170 void
  171 atw_pci_attach(struct device *parent, struct device *self, void *aux)
  172 {
  173         struct atw_pci_softc *psc = (void *) self;
  174         struct atw_softc *sc = &psc->psc_atw;
  175         struct pci_attach_args *pa = aux;
  176         pci_chipset_tag_t pc = pa->pa_pc;
  177         const char *intrstr = NULL;
  178         bus_space_tag_t iot, memt;
  179         bus_space_handle_t ioh, memh;
  180         int ioh_valid, memh_valid;
  181         const struct atw_pci_product *app;
  182         pcireg_t reg;
  183         int pmreg, rev;
  184 
  185         psc->psc_pc = pa->pa_pc;
  186         psc->psc_pcitag = pa->pa_tag;
  187 
  188         app = atw_pci_lookup(pa);
  189         if (app == NULL) {
  190                 printf("\n");
  191                 panic("atw_pci_attach: impossible");
  192         }
  193 
  194         /*
  195          * No power management hooks.
  196          * XXX Maybe we should add some!
  197          */
  198         sc->sc_flags |= ATWF_ENABLED;
  199 
  200         /*
  201          * Get revision info, and set some chip-specific variables.
  202          */
  203         rev = PCI_REVISION(pa->pa_class);
  204         printf(": %s, pass %d.%d\n", app->app_product_name,
  205             (rev >> 4) & 0xf, rev & 0xf);
  206 
  207         /*
  208          * Check to see if the device is in power-save mode, and
  209          * being it out if necessary.
  210          *
  211          * XXX This code comes almost verbatim from if_tlp_pci.c. I do
  212          * not understand it. Tulip clears the "sleep mode" bit in the
  213          * CFDA register, first.  There is an equivalent (?) register at the
  214          * same place in the ADM8211, but the docs do not assign its bits
  215          * any meanings. -dcy
  216          */
  217         if (pci_get_capability(pc, pa->pa_tag, PCI_CAP_PWRMGMT, &pmreg, 0)) {
  218                 reg = pci_conf_read(pc, pa->pa_tag, pmreg + PCI_PMCSR);
  219                 switch (reg & PCI_PMCSR_STATE_MASK) {
  220                 case PCI_PMCSR_STATE_D1:
  221                 case PCI_PMCSR_STATE_D2:
  222                         printf(": waking up from power state D%d\n%s",
  223                             reg & PCI_PMCSR_STATE_MASK, sc->sc_dev.dv_xname);
  224                         pci_conf_write(pc, pa->pa_tag, pmreg + PCI_PMCSR,
  225                             (reg & ~PCI_PMCSR_STATE_MASK) |
  226                             PCI_PMCSR_STATE_D0);
  227                         break;
  228                 case PCI_PMCSR_STATE_D3:
  229                         /*
  230                          * The card has lost all configuration data in
  231                          * this state, so punt.
  232                          */
  233                         printf(": unable to wake up from power state D3, "
  234                                "reboot required.\n");
  235                         pci_conf_write(pc, pa->pa_tag, pmreg + PCI_PMCSR,
  236                             (reg & ~PCI_PMCSR_STATE_MASK) |
  237                             PCI_PMCSR_STATE_D0);
  238                         return;
  239                 }
  240         }
  241 
  242         /*
  243          * Map the device.
  244          */
  245         ioh_valid = (pci_mapreg_map(pa, ATW_PCI_IOBA,
  246             PCI_MAPREG_TYPE_IO, 0,
  247             &iot, &ioh, NULL, NULL) == 0);
  248         memh_valid = (pci_mapreg_map(pa, ATW_PCI_MMBA,
  249             PCI_MAPREG_TYPE_MEM|PCI_MAPREG_MEM_TYPE_32BIT, 0,
  250             &memt, &memh, NULL, NULL) == 0);
  251 
  252         if (memh_valid) {
  253                 sc->sc_st = memt;
  254                 sc->sc_sh = memh;
  255         } else if (ioh_valid) {
  256                 sc->sc_st = iot;
  257                 sc->sc_sh = ioh;
  258         } else {
  259                 printf(": unable to map device registers\n");
  260                 return;
  261         }
  262 
  263         sc->sc_dmat = pa->pa_dmat;
  264 
  265         /*
  266          * Make sure bus mastering is enabled.
  267          */
  268         pci_conf_write(pc, pa->pa_tag, PCI_COMMAND_STATUS_REG,
  269             pci_conf_read(pc, pa->pa_tag, PCI_COMMAND_STATUS_REG) |
  270             PCI_COMMAND_MASTER_ENABLE);
  271 
  272         /*
  273          * Get the cacheline size.
  274          */
  275         sc->sc_cacheline = PCI_CACHELINE(pci_conf_read(pc, pa->pa_tag,
  276             PCI_BHLC_REG));
  277 
  278         /*
  279          * Get PCI data moving command info.
  280          */
  281         if (pa->pa_flags & PCI_FLAGS_MRL_OKAY) /* read line */
  282                 sc->sc_flags |= ATWF_MRL;
  283         if (pa->pa_flags & PCI_FLAGS_MRM_OKAY) /* read multiple */
  284                 sc->sc_flags |= ATWF_MRM;
  285         if (pa->pa_flags & PCI_FLAGS_MWI_OKAY) /* write invalidate */
  286                 sc->sc_flags |= ATWF_MWI;
  287 
  288         /*
  289          * Map and establish our interrupt.
  290          */
  291         if (pci_intr_map(pa, &psc->psc_ih)) {
  292                 printf("%s: unable to map interrupt\n",
  293                     sc->sc_dev.dv_xname);
  294                 return;
  295         }
  296         intrstr = pci_intr_string(pc, psc->psc_ih); 
  297         psc->psc_intrcookie = pci_intr_establish(pc, psc->psc_ih, IPL_NET,
  298             atw_intr, sc);
  299         if (psc->psc_intrcookie == NULL) {
  300                 printf("%s: unable to establish interrupt",
  301                     sc->sc_dev.dv_xname);
  302                 if (intrstr != NULL)
  303                         printf(" at %s", intrstr);
  304                 printf("\n");
  305                 return;
  306         }
  307 
  308         printf("%s: interrupting at %s\n", sc->sc_dev.dv_xname, intrstr);
  309 
  310         sc->sc_enable = atw_pci_enable;
  311         sc->sc_disable = atw_pci_disable;
  312 
  313         /*
  314          * Finish off the attach.
  315          */
  316         atw_attach(sc);
  317 }
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FreeBSD/Linux Kernel Cross Reference sys/dev/pci/if_atw_pci.c

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sys/dev/pci/if_atw_pci.c
