The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/dev/an/if_an_pci.c

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    1 /*
    2  * Copyright (c) 1997, 1998, 1999
    3  *      Bill Paul <wpaul@ctr.columbia.edu>.  All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 3. All advertising materials mentioning features or use of this software
   14  *    must display the following acknowledgement:
   15  *      This product includes software developed by Bill Paul.
   16  * 4. Neither the name of the author nor the names of any co-contributors
   17  *    may be used to endorse or promote products derived from this software
   18  *    without specific prior written permission.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
   21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   23  * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
   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
   30  * THE POSSIBILITY OF SUCH DAMAGE.
   31  */
   32 
   33 /*
   34  * This is a PCI shim for the Aironet PC4500/4800 wireless network
   35  * driver. Aironet makes PCMCIA, ISA and PCI versions of these devices,
   36  * which all have basically the same interface. The ISA and PCI cards
   37  * are actually bridge adapters with PCMCIA cards inserted into them,
   38  * however they appear as normal PCI or ISA devices to the host.
   39  *
   40  * All we do here is handle the PCI probe and attach and set up an
   41  * interrupt handler entry point. The PCI version of the card uses
   42  * a PLX 9050 PCI to "dumb bus" bridge chip, which provides us with
   43  * multiple PCI address space mappings. The primary mapping at PCI
   44  * register 0x14 is for the PLX chip itself, *NOT* the Aironet card.
   45  * The I/O address of the Aironet is actually at register 0x18, which
   46  * is the local bus mapping register for bus space 0. There are also
   47  * registers for additional register spaces at registers 0x1C and
   48  * 0x20, but these are unused in the Aironet devices. To find out
   49  * more, you need a datasheet for the 9050 from PLX, but you have
   50  * to go through their sales office to get it. Bleh.
   51  */
   52 
   53 #include <sys/cdefs.h>
   54 __FBSDID("$FreeBSD: releng/5.1/sys/dev/an/if_an_pci.c 113506 2003-04-15 06:37:30Z mdodd $");
   55 
   56 #include "opt_inet.h"
   57 
   58 #ifdef INET
   59 #define ANCACHE
   60 #endif
   61 
   62 #include <sys/param.h>
   63 #include <sys/systm.h>
   64 #include <sys/sockio.h>
   65 #include <sys/mbuf.h>
   66 #include <sys/kernel.h>
   67 #include <sys/socket.h>
   68 
   69 #include <sys/module.h>
   70 #include <sys/bus.h>
   71 #include <machine/bus.h>
   72 #include <sys/rman.h>
   73 #include <sys/lock.h>
   74 #include <sys/mutex.h>
   75 #include <machine/resource.h>
   76 
   77 #include <net/if.h>
   78 #include <net/if_arp.h>
   79 #include <net/ethernet.h>
   80 #include <net/if_dl.h>
   81 #include <net/if_media.h>
   82 
   83 #include <pci/pcireg.h>
   84 #include <pci/pcivar.h>
   85 
   86 #include <dev/an/if_aironet_ieee.h>
   87 #include <dev/an/if_anreg.h>
   88 
   89 struct an_type {
   90         u_int16_t               an_vid;
   91         u_int16_t               an_did;
   92         char                    *an_name;
   93 };
   94 
   95 #define AIRONET_VENDORID        0x14B9
   96 #define AIRONET_DEVICEID_35x    0x0350
   97 #define AIRONET_DEVICEID_4500   0x4500
   98 #define AIRONET_DEVICEID_4800   0x4800
   99 #define AIRONET_DEVICEID_4xxx   0x0001
  100 #define AIRONET_DEVICEID_MPI350 0xA504
  101 #define AN_PCI_PLX_LOIO         0x14    /* PLX chip iobase */
  102 #define AN_PCI_LOIO             0x18    /* Aironet iobase */
  103 
  104 static struct an_type an_devs[] = {
  105         { AIRONET_VENDORID, AIRONET_DEVICEID_35x, "Cisco Aironet 350 Series" },
  106         { AIRONET_VENDORID, AIRONET_DEVICEID_4500, "Aironet PCI4500" },
  107         { AIRONET_VENDORID, AIRONET_DEVICEID_4800, "Aironet PCI4800" },
  108         { AIRONET_VENDORID, AIRONET_DEVICEID_4xxx, "Aironet PCI4500/PCI4800" },
  109         { 0, 0, NULL }
  110 };
  111 
  112 static int an_probe_pci         (device_t);
  113 static int an_attach_pci        (device_t);
  114 static int an_detach_pci        (device_t);
  115 static int an_suspend_pci       (device_t);
  116 static int an_resume_pci        (device_t);
  117 
  118 static int
  119 an_probe_pci(device_t dev)
  120 {
  121         struct an_type          *t;
  122 
  123         t = an_devs;
  124 
  125         while (t->an_name != NULL) {
  126                 if (pci_get_vendor(dev) == t->an_vid &&
  127                     pci_get_device(dev) == t->an_did) {
  128                         device_set_desc(dev, t->an_name);
  129                         return(0);
  130                 }
  131                 t++;
  132         }
  133 
  134         if (pci_get_vendor(dev) == AIRONET_VENDORID &&
  135             pci_get_device(dev) == AIRONET_DEVICEID_MPI350) {
  136                 device_set_desc(dev, "Cisco Aironet MPI350");
  137                 return(0);
  138         }
  139 
  140         return(ENXIO);
  141 }
  142 
  143 static int
  144 an_attach_pci(dev)
  145         device_t                dev;
  146 {
  147         u_int32_t               command;
  148         struct an_softc         *sc;
  149         int                     unit, flags, error = 0;
  150 
  151         sc = device_get_softc(dev);
  152         unit = device_get_unit(dev);
  153         flags = device_get_flags(dev);
  154         bzero(sc, sizeof(struct an_softc));
  155 
  156         if (pci_get_vendor(dev) == AIRONET_VENDORID &&
  157             pci_get_device(dev) == AIRONET_DEVICEID_MPI350) {
  158                 sc->mpi350 = 1;
  159                 sc->port_rid = PCIR_MAPS;
  160         } else {
  161                 /*
  162                  * Map control/status registers.
  163                  */
  164                 command = pci_read_config(dev, PCIR_COMMAND, 4);
  165                 command |= PCIM_CMD_PORTEN;
  166                 pci_write_config(dev, PCIR_COMMAND, command, 4);
  167                 command = pci_read_config(dev, PCIR_COMMAND, 4);
  168 
  169                 if (!(command & PCIM_CMD_PORTEN)) {
  170                         printf("an%d: failed to enable I/O ports!\n", unit);
  171                         error = ENXIO;
  172                         goto fail;
  173                 }
  174                 sc->port_rid = AN_PCI_LOIO;
  175         }
  176         error = an_alloc_port(dev, sc->port_rid, 1);
  177 
  178         if (error) {
  179                 printf("an%d: couldn't map ports\n", unit);
  180                 goto fail;
  181         }
  182 
  183         sc->an_btag = rman_get_bustag(sc->port_res);
  184         sc->an_bhandle = rman_get_bushandle(sc->port_res);
  185 
  186         /* Allocate memory for MPI350 */
  187         if (sc->mpi350) {
  188                 /* Allocate memory */
  189                 sc->mem_rid = PCIR_MAPS + 4;
  190                 error = an_alloc_memory(dev, sc->mem_rid, 1);
  191                 if (error) {
  192                         printf("an%d: couldn't map memory\n", unit);
  193                         goto fail;
  194                 }
  195                 sc->an_mem_btag = rman_get_bustag(sc->mem_res);
  196                 sc->an_mem_bhandle = rman_get_bushandle(sc->mem_res);
  197 
  198                 /* Allocate aux. memory */
  199                 sc->mem_aux_rid = PCIR_MAPS + 8;
  200                 error = an_alloc_aux_memory(dev, sc->mem_aux_rid, 
  201                     AN_AUXMEMSIZE);
  202                 if (error) {
  203                         printf("an%d: couldn't map aux memory\n", unit);
  204                         goto fail;
  205                 }
  206                 sc->an_mem_aux_btag = rman_get_bustag(sc->mem_aux_res);
  207                 sc->an_mem_aux_bhandle = rman_get_bushandle(sc->mem_aux_res);
  208 
  209                 /* Allocate DMA region */
  210                 error = bus_dma_tag_create(NULL,        /* parent */
  211                                1, 0,                    /* alignment, bounds */
  212                                BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
  213                                BUS_SPACE_MAXADDR,       /* highaddr */
  214                                NULL, NULL,              /* filter, filterarg */
  215                                0x3ffff,                 /* maxsize XXX */
  216                                1,                       /* nsegments */
  217                                0xffff,                  /* maxsegsize XXX */
  218                                BUS_DMA_ALLOCNOW,        /* flags */
  219                                &sc->an_dtag);
  220                 if (error) {
  221                         printf("an%d: couldn't get DMA region\n", unit);
  222                         goto fail;
  223                 }
  224         }
  225 
  226         /* Allocate interrupt */
  227         error = an_alloc_irq(dev, 0, RF_SHAREABLE);
  228         if (error) {
  229                 goto fail;
  230         }
  231 
  232         sc->an_dev = dev;
  233         error = an_attach(sc, device_get_unit(dev), flags);
  234         if (error) {
  235                 goto fail;
  236         }
  237 
  238         /*
  239          * Must setup the interrupt after the an_attach to prevent racing.
  240          */
  241         error = bus_setup_intr(dev, sc->irq_res, INTR_TYPE_NET,
  242             an_intr, sc, &sc->irq_handle);
  243 
  244 fail:
  245         if (error)
  246                 an_release_resources(dev);
  247         return(error);
  248 }
  249 
  250 static int
  251 an_detach_pci(device_t dev)
  252 {
  253         struct an_softc         *sc = device_get_softc(dev);
  254         struct ifnet            *ifp = &sc->arpcom.ac_if;
  255 
  256         an_stop(sc);
  257         ifmedia_removeall(&sc->an_ifmedia);
  258         ether_ifdetach(ifp);
  259         bus_teardown_intr(dev, sc->irq_res, sc->irq_handle);
  260         an_release_resources(dev);
  261 
  262         return (0);
  263 }
  264 
  265 static int
  266 an_suspend_pci(device_t dev)
  267 {
  268         an_shutdown(dev);
  269         
  270         return (0);
  271 }
  272 
  273 static int
  274 an_resume_pci(device_t dev)
  275 {
  276         an_resume(dev);
  277 
  278         return (0);
  279 }
  280 
  281 static device_method_t an_pci_methods[] = {
  282         /* Device interface */
  283         DEVMETHOD(device_probe,         an_probe_pci),
  284         DEVMETHOD(device_attach,        an_attach_pci),
  285         DEVMETHOD(device_detach,        an_detach_pci),
  286         DEVMETHOD(device_shutdown,      an_shutdown),
  287         DEVMETHOD(device_suspend,       an_suspend_pci),
  288         DEVMETHOD(device_resume,        an_resume_pci),
  289         { 0, 0 }
  290 };
  291 
  292 static driver_t an_pci_driver = {
  293         "an",
  294         an_pci_methods,
  295         sizeof(struct an_softc),
  296 };
  297 
  298 static devclass_t an_devclass;
  299 
  300 DRIVER_MODULE(an, pci, an_pci_driver, an_devclass, 0, 0);
  301 MODULE_DEPEND(an, pci, 1, 1, 1);
  302 MODULE_DEPEND(an, wlan, 1, 1, 1);

Cache object: d002cc3ebc69703543a4d63f273e9b8d


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