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/ral/if_ral_pci.c

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    1 /*      $FreeBSD$       */
    2 
    3 /*-
    4  * Copyright (c) 2005, 2006
    5  *      Damien Bergamini <damien.bergamini@free.fr>
    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 #include <sys/cdefs.h>
   21 __FBSDID("$FreeBSD$");
   22 
   23 /*
   24  * PCI/Cardbus front-end for the Ralink RT2560/RT2561/RT2561S/RT2661 driver.
   25  */
   26 
   27 #include <sys/param.h>
   28 #include <sys/sysctl.h>
   29 #include <sys/sockio.h>
   30 #include <sys/mbuf.h>
   31 #include <sys/kernel.h>
   32 #include <sys/socket.h>
   33 #include <sys/systm.h>
   34 #include <sys/malloc.h>
   35 #include <sys/module.h>
   36 #include <sys/bus.h>
   37 #include <sys/endian.h>
   38 
   39 #include <machine/bus.h>
   40 #include <machine/resource.h>
   41 #include <sys/rman.h>
   42 
   43 #include <net/bpf.h>
   44 #include <net/if.h>
   45 #include <net/if_arp.h>
   46 #include <net/ethernet.h>
   47 #include <net/if_dl.h>
   48 #include <net/if_media.h>
   49 #include <net/if_types.h>
   50 
   51 #include <net80211/ieee80211_var.h>
   52 #include <net80211/ieee80211_radiotap.h>
   53 
   54 #include <dev/pci/pcireg.h>
   55 #include <dev/pci/pcivar.h>
   56 
   57 #include <dev/ral/if_ralrate.h>
   58 #include <dev/ral/rt2560var.h>
   59 #include <dev/ral/rt2661var.h>
   60 
   61 MODULE_DEPEND(ral, pci, 1, 1, 1);
   62 MODULE_DEPEND(ral, wlan, 1, 1, 1);
   63 
   64 struct ral_pci_ident {
   65         uint16_t        vendor;
   66         uint16_t        device;
   67         const char      *name;
   68 };
   69 
   70 static const struct ral_pci_ident ral_pci_ids[] = {
   71         { 0x1814, 0x0201, "Ralink Technology RT2560" },
   72         { 0x1814, 0x0301, "Ralink Technology RT2561S" },
   73         { 0x1814, 0x0302, "Ralink Technology RT2561" },
   74         { 0x1814, 0x0401, "Ralink Technology RT2661" },
   75 
   76         { 0, 0, NULL }
   77 };
   78 
   79 static struct ral_opns {
   80         int     (*attach)(device_t, int);
   81         int     (*detach)(void *);
   82         void    (*shutdown)(void *);
   83         void    (*suspend)(void *);
   84         void    (*resume)(void *);
   85         void    (*intr)(void *);
   86 
   87 }  ral_rt2560_opns = {
   88         rt2560_attach,
   89         rt2560_detach,
   90         rt2560_shutdown,
   91         rt2560_suspend,
   92         rt2560_resume,
   93         rt2560_intr
   94 
   95 }, ral_rt2661_opns = {
   96         rt2661_attach,
   97         rt2661_detach,
   98         rt2661_shutdown,
   99         rt2661_suspend,
  100         rt2661_resume,
  101         rt2661_intr
  102 };
  103 
  104 struct ral_pci_softc {
  105         union {
  106                 struct rt2560_softc sc_rt2560;
  107                 struct rt2661_softc sc_rt2661;
  108         } u;
  109 
  110         struct ral_opns         *sc_opns;
  111         int                     irq_rid;
  112         int                     mem_rid;
  113         struct resource         *irq;
  114         struct resource         *mem;
  115         void                    *sc_ih;
  116 };
  117 
  118 static int ral_pci_probe(device_t);
  119 static int ral_pci_attach(device_t);
  120 static int ral_pci_detach(device_t);
  121 static int ral_pci_shutdown(device_t);
  122 static int ral_pci_suspend(device_t);
  123 static int ral_pci_resume(device_t);
  124 
  125 static device_method_t ral_pci_methods[] = {
  126         /* Device interface */
  127         DEVMETHOD(device_probe,         ral_pci_probe),
  128         DEVMETHOD(device_attach,        ral_pci_attach),
  129         DEVMETHOD(device_detach,        ral_pci_detach),
  130         DEVMETHOD(device_shutdown,      ral_pci_shutdown),
  131         DEVMETHOD(device_suspend,       ral_pci_suspend),
  132         DEVMETHOD(device_resume,        ral_pci_resume),
  133 
  134         { 0, 0 }
  135 };
  136 
  137 static driver_t ral_pci_driver = {
  138         "ral",
  139         ral_pci_methods,
  140         sizeof (struct ral_pci_softc)
  141 };
  142 
  143 static devclass_t ral_devclass;
  144 
  145 DRIVER_MODULE(ral, pci, ral_pci_driver, ral_devclass, 0, 0);
  146 DRIVER_MODULE(ral, cardbus, ral_pci_driver, ral_devclass, 0, 0);
  147 
  148 static int
  149 ral_pci_probe(device_t dev)
  150 {
  151         const struct ral_pci_ident *ident;
  152 
  153         for (ident = ral_pci_ids; ident->name != NULL; ident++) {
  154                 if (pci_get_vendor(dev) == ident->vendor &&
  155                     pci_get_device(dev) == ident->device) {
  156                         device_set_desc(dev, ident->name);
  157                         return 0;
  158                 }
  159         }
  160         return ENXIO;
  161 }
  162 
  163 /* Base Address Register */
  164 #define RAL_PCI_BAR0    0x10
  165 
  166 static int
  167 ral_pci_attach(device_t dev)
  168 {
  169         struct ral_pci_softc *psc = device_get_softc(dev);
  170         struct rt2560_softc *sc = &psc->u.sc_rt2560;
  171         int error;
  172 
  173         if (pci_get_powerstate(dev) != PCI_POWERSTATE_D0) {
  174                 device_printf(dev, "chip is in D%d power mode "
  175                     "-- setting to D0\n", pci_get_powerstate(dev));
  176                 pci_set_powerstate(dev, PCI_POWERSTATE_D0);
  177         }
  178 
  179         /* enable bus-mastering */
  180         pci_enable_busmaster(dev);
  181 
  182         psc->sc_opns = (pci_get_device(dev) == 0x0201) ? &ral_rt2560_opns :
  183             &ral_rt2661_opns;
  184 
  185         psc->mem_rid = RAL_PCI_BAR0;
  186         psc->mem = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &psc->mem_rid,
  187             RF_ACTIVE);
  188         if (psc->mem == NULL) {
  189                 device_printf(dev, "could not allocate memory resource\n");
  190                 return ENXIO;
  191         }
  192 
  193         sc->sc_st = rman_get_bustag(psc->mem);
  194         sc->sc_sh = rman_get_bushandle(psc->mem);
  195 
  196         psc->irq_rid = 0;
  197         psc->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &psc->irq_rid,
  198             RF_ACTIVE | RF_SHAREABLE);
  199         if (psc->irq == NULL) {
  200                 device_printf(dev, "could not allocate interrupt resource\n");
  201                 return ENXIO;
  202         }
  203 
  204         error = (*psc->sc_opns->attach)(dev, pci_get_device(dev));
  205         if (error != 0)
  206                 return error;
  207 
  208         /*
  209          * Hook our interrupt after all initialization is complete.
  210          */
  211         error = bus_setup_intr(dev, psc->irq, INTR_TYPE_NET | INTR_MPSAFE,
  212             psc->sc_opns->intr, psc, &psc->sc_ih);
  213         if (error != 0) {
  214                 device_printf(dev, "could not set up interrupt\n");
  215                 return error;
  216         }
  217 
  218         return 0;
  219 }
  220 
  221 static int
  222 ral_pci_detach(device_t dev)
  223 {
  224         struct ral_pci_softc *psc = device_get_softc(dev);
  225 
  226         (*psc->sc_opns->detach)(psc);
  227 
  228         bus_generic_detach(dev);
  229         bus_teardown_intr(dev, psc->irq, psc->sc_ih);
  230         bus_release_resource(dev, SYS_RES_IRQ, psc->irq_rid, psc->irq);
  231 
  232         bus_release_resource(dev, SYS_RES_MEMORY, psc->mem_rid, psc->mem);
  233 
  234         return 0;
  235 }
  236 
  237 static int
  238 ral_pci_shutdown(device_t dev)
  239 {
  240         struct ral_pci_softc *psc = device_get_softc(dev);
  241 
  242         (*psc->sc_opns->shutdown)(psc);
  243 
  244         return 0;
  245 }
  246 
  247 static int
  248 ral_pci_suspend(device_t dev)
  249 {
  250         struct ral_pci_softc *psc = device_get_softc(dev);
  251 
  252         (*psc->sc_opns->suspend)(psc);
  253 
  254         return 0;
  255 }
  256 
  257 static int
  258 ral_pci_resume(device_t dev)
  259 {
  260         struct ral_pci_softc *psc = device_get_softc(dev);
  261 
  262         (*psc->sc_opns->resume)(psc);
  263 
  264         return 0;
  265 }

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