cardbus.c

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    1 /*-
    2  * Copyright (c) 2003-2008 M. Warner Losh.  All Rights Reserved.
    3  * Copyright (c) 2000,2001 Jonathan Chen.  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  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  */
   26 
   27 #include <sys/cdefs.h>
   28 __FBSDID("$FreeBSD$");
   29 
   30 #include <sys/param.h>
   31 #include <sys/systm.h>
   32 #include <sys/malloc.h>
   33 #include <sys/module.h>
   34 #include <sys/kernel.h>
   35 #include <sys/sysctl.h>
   36 
   37 #include <sys/bus.h>
   38 #include <machine/bus.h>
   39 #include <sys/rman.h>
   40 #include <machine/resource.h>
   41 
   42 #include <sys/pciio.h>
   43 #include <dev/pci/pcivar.h>
   44 #include <dev/pci/pcireg.h>
   45 #include <dev/pci/pci_private.h>
   46 
   47 #include <dev/cardbus/cardbusreg.h>
   48 #include <dev/cardbus/cardbusvar.h>
   49 #include <dev/cardbus/cardbus_cis.h>
   50 #include <dev/pccard/pccard_cis.h>
   51 #include <dev/pccard/pccardvar.h>
   52 
   53 #include "power_if.h"
   54 #include "pcib_if.h"
   55 
   56 /* sysctl vars */
   57 static SYSCTL_NODE(_hw, OID_AUTO, cardbus, CTLFLAG_RD, 0, "CardBus parameters");
   58 
   59 int    cardbus_debug = 0;
   60 TUNABLE_INT("hw.cardbus.debug", &cardbus_debug);
   61 SYSCTL_INT(_hw_cardbus, OID_AUTO, debug, CTLFLAG_RW,
   62     &cardbus_debug, 0,
   63   "CardBus debug");
   64 
   65 int    cardbus_cis_debug = 0;
   66 TUNABLE_INT("hw.cardbus.cis_debug", &cardbus_cis_debug);
   67 SYSCTL_INT(_hw_cardbus, OID_AUTO, cis_debug, CTLFLAG_RW,
   68     &cardbus_cis_debug, 0,
   69   "CardBus CIS debug");
   70 
   71 #define DPRINTF(a) if (cardbus_debug) printf a
   72 #define DEVPRINTF(x) if (cardbus_debug) device_printf x
   73 
   74 static int      cardbus_attach(device_t cbdev);
   75 static int      cardbus_attach_card(device_t cbdev);
   76 static int      cardbus_detach(device_t cbdev);
   77 static int      cardbus_detach_card(device_t cbdev);
   78 static void     cardbus_device_setup_regs(pcicfgregs *cfg);
   79 static void     cardbus_driver_added(device_t cbdev, driver_t *driver);
   80 static int      cardbus_probe(device_t cbdev);
   81 static int      cardbus_read_ivar(device_t cbdev, device_t child, int which,
   82                     uintptr_t *result);
   83 
   84 /************************************************************************/
   85 /* Probe/Attach                                                         */
   86 /************************************************************************/
   87 
   88 static int
   89 cardbus_probe(device_t cbdev)
   90 {
   91         device_set_desc(cbdev, "CardBus bus");
   92         return (0);
   93 }
   94 
   95 static int
   96 cardbus_attach(device_t cbdev)
   97 {
   98         struct cardbus_softc *sc;
   99 #ifdef PCI_RES_BUS
  100         int rid;
  101 #endif
  102 
  103         sc = device_get_softc(cbdev);
  104         sc->sc_dev = cbdev;
  105 #ifdef PCI_RES_BUS
  106         rid = 0;
  107         sc->sc_bus = bus_alloc_resource(cbdev, PCI_RES_BUS, &rid,
  108             pcib_get_bus(cbdev), pcib_get_bus(cbdev), 1, 0);
  109         if (sc->sc_bus == NULL) {
  110                 device_printf(cbdev, "failed to allocate bus number\n");
  111                 return (ENXIO);
  112         }
  113 #endif
  114         return (0);
  115 }
  116 
  117 static int
  118 cardbus_detach(device_t cbdev)
  119 {
  120 #ifdef PCI_RES_BUS
  121         struct cardbus_softc *sc;
  122 #endif
  123 
  124         cardbus_detach_card(cbdev);
  125 #ifdef PCI_RES_BUS
  126         sc = device_get_softc(cbdev);
  127         (void)bus_release_resource(cbdev, PCI_RES_BUS, 0, sc->sc_bus);
  128 #endif
  129         return (0);
  130 }
  131 
  132 static int
  133 cardbus_suspend(device_t self)
  134 {
  135 
  136         cardbus_detach_card(self);
  137         return (0);
  138 }
  139 
  140 static int
  141 cardbus_resume(device_t self)
  142 {
  143 
  144         return (0);
  145 }
  146 
  147 /************************************************************************/
  148 /* Attach/Detach card                                                   */
  149 /************************************************************************/
  150 
  151 static void
  152 cardbus_device_setup_regs(pcicfgregs *cfg)
  153 {
  154         device_t dev = cfg->dev;
  155         int i;
  156 
  157         /*
  158          * Some cards power up with garbage in their BARs.  This
  159          * code clears all that junk out.
  160          */
  161         for (i = 0; i < PCIR_MAX_BAR_0; i++)
  162                 pci_write_config(dev, PCIR_BAR(i), 0, 4);
  163 
  164         cfg->intline =
  165             pci_get_irq(device_get_parent(device_get_parent(dev)));
  166         pci_write_config(dev, PCIR_INTLINE, cfg->intline, 1);
  167         pci_write_config(dev, PCIR_CACHELNSZ, 0x08, 1);
  168         pci_write_config(dev, PCIR_LATTIMER, 0xa8, 1);
  169         pci_write_config(dev, PCIR_MINGNT, 0x14, 1);
  170         pci_write_config(dev, PCIR_MAXLAT, 0x14, 1);
  171 }
  172 
  173 static int
  174 cardbus_attach_card(device_t cbdev)
  175 {
  176         device_t brdev = device_get_parent(cbdev);
  177         device_t child;
  178         int bus, domain, slot, func;
  179         int cardattached = 0;
  180         int cardbusfunchigh = 0;
  181         struct cardbus_softc *sc;
  182 
  183         sc = device_get_softc(cbdev);
  184         cardbus_detach_card(cbdev); /* detach existing cards */
  185         POWER_ENABLE_SOCKET(brdev, cbdev);
  186         domain = pcib_get_domain(cbdev);
  187         bus = pcib_get_bus(cbdev);
  188         slot = 0;
  189         /* For each function, set it up and try to attach a driver to it */
  190         for (func = 0; func <= cardbusfunchigh; func++) {
  191                 struct cardbus_devinfo *dinfo;
  192 
  193                 dinfo = (struct cardbus_devinfo *)
  194                     pci_read_device(brdev, domain, bus, slot, func,
  195                         sizeof(struct cardbus_devinfo));
  196                 if (dinfo == NULL)
  197                         continue;
  198                 if (dinfo->pci.cfg.mfdev)
  199                         cardbusfunchigh = PCI_FUNCMAX;
  200 
  201                 child = device_add_child(cbdev, NULL, -1);
  202                 if (child == NULL) {
  203                         DEVPRINTF((cbdev, "Cannot add child!\n"));
  204                         pci_freecfg((struct pci_devinfo *)dinfo);
  205                         continue;
  206                 }
  207                 dinfo->pci.cfg.dev = child;
  208                 resource_list_init(&dinfo->pci.resources);
  209                 device_set_ivars(child, dinfo);
  210                 cardbus_device_create(sc, dinfo, cbdev, child);
  211                 if (cardbus_do_cis(cbdev, child) != 0)
  212                         DEVPRINTF((cbdev, "Warning: Bogus CIS ignored\n"));
  213                 pci_cfg_save(dinfo->pci.cfg.dev, &dinfo->pci, 0);
  214                 pci_cfg_restore(dinfo->pci.cfg.dev, &dinfo->pci);
  215                 cardbus_device_setup_regs(&dinfo->pci.cfg);
  216                 pci_add_resources(cbdev, child, 1, dinfo->mprefetchable);
  217                 pci_print_verbose(&dinfo->pci);
  218                 if (device_probe_and_attach(child) == 0)
  219                         cardattached++;
  220                 else
  221                         pci_cfg_save(dinfo->pci.cfg.dev, &dinfo->pci, 1);
  222         }
  223         if (cardattached > 0)
  224                 return (0);
  225 /*      POWER_DISABLE_SOCKET(brdev, cbdev); */
  226         return (ENOENT);
  227 }
  228 
  229 static void
  230 cardbus_child_deleted(device_t cbdev, device_t child)
  231 {
  232         struct cardbus_devinfo *dinfo = device_get_ivars(child);
  233 
  234         if (dinfo->pci.cfg.dev != child)
  235                 device_printf(cbdev, "devinfo dev mismatch\n");
  236         cardbus_device_destroy(dinfo);
  237         pci_child_deleted(cbdev, child);
  238 }
  239 
  240 static int
  241 cardbus_detach_card(device_t cbdev)
  242 {
  243         int err = 0;
  244 
  245         err = bus_generic_detach(cbdev);
  246         if (err)
  247                 return (err);
  248         err = device_delete_children(cbdev);
  249         if (err)
  250                 return (err);
  251 
  252         POWER_DISABLE_SOCKET(device_get_parent(cbdev), cbdev);
  253         return (err);
  254 }
  255 
  256 static void
  257 cardbus_driver_added(device_t cbdev, driver_t *driver)
  258 {
  259         int numdevs;
  260         device_t *devlist;
  261         device_t dev;
  262         int i;
  263         struct cardbus_devinfo *dinfo;
  264 
  265         DEVICE_IDENTIFY(driver, cbdev);
  266         if (device_get_children(cbdev, &devlist, &numdevs) != 0)
  267                 return;
  268 
  269         /*
  270          * If there are no drivers attached, but there are children,
  271          * then power the card up.
  272          */
  273         for (i = 0; i < numdevs; i++) {
  274                 dev = devlist[i];
  275                 if (device_get_state(dev) != DS_NOTPRESENT)
  276                     break;
  277         }
  278         if (i > 0 && i == numdevs)
  279                 POWER_ENABLE_SOCKET(device_get_parent(cbdev), cbdev);
  280         for (i = 0; i < numdevs; i++) {
  281                 dev = devlist[i];
  282                 if (device_get_state(dev) != DS_NOTPRESENT)
  283                         continue;
  284                 dinfo = device_get_ivars(dev);
  285                 pci_print_verbose(&dinfo->pci);
  286                 if (bootverbose)
  287                         printf("pci%d:%d:%d:%d: reprobing on driver added\n",
  288                             dinfo->pci.cfg.domain, dinfo->pci.cfg.bus,
  289                             dinfo->pci.cfg.slot, dinfo->pci.cfg.func);
  290                 pci_cfg_restore(dinfo->pci.cfg.dev, &dinfo->pci);
  291                 if (device_probe_and_attach(dev) != 0)
  292                         pci_cfg_save(dev, &dinfo->pci, 1);
  293         }
  294         free(devlist, M_TEMP);
  295 }
  296 
  297 /************************************************************************/
  298 /* Other Bus Methods                                                    */
  299 /************************************************************************/
  300 
  301 static int
  302 cardbus_read_ivar(device_t cbdev, device_t child, int which, uintptr_t *result)
  303 {
  304         struct cardbus_devinfo *dinfo;
  305         pcicfgregs *cfg;
  306 
  307         dinfo = device_get_ivars(child);
  308         cfg = &dinfo->pci.cfg;
  309 
  310         switch (which) {
  311         case PCI_IVAR_ETHADDR:
  312                 /*
  313                  * The generic accessor doesn't deal with failure, so
  314                  * we set the return value, then return an error.
  315                  */
  316                 if (dinfo->fepresent & (1 << PCCARD_TPLFE_TYPE_LAN_NID)) {
  317                         *((uint8_t **) result) = dinfo->funce.lan.nid;
  318                         break;
  319                 }
  320                 *((uint8_t **) result) = NULL;
  321                 return (EINVAL);
  322         default:
  323                 return (pci_read_ivar(cbdev, child, which, result));
  324         }
  325         return 0;
  326 }
  327 
  328 static device_method_t cardbus_methods[] = {
  329         /* Device interface */
  330         DEVMETHOD(device_probe,         cardbus_probe),
  331         DEVMETHOD(device_attach,        cardbus_attach),
  332         DEVMETHOD(device_detach,        cardbus_detach),
  333         DEVMETHOD(device_suspend,       cardbus_suspend),
  334         DEVMETHOD(device_resume,        cardbus_resume),
  335 
  336         /* Bus interface */
  337         DEVMETHOD(bus_child_deleted,    cardbus_child_deleted),
  338         DEVMETHOD(bus_get_dma_tag,      bus_generic_get_dma_tag),
  339         DEVMETHOD(bus_read_ivar,        cardbus_read_ivar),
  340         DEVMETHOD(bus_driver_added,     cardbus_driver_added),
  341 
  342         /* Card Interface */
  343         DEVMETHOD(card_attach_card,     cardbus_attach_card),
  344         DEVMETHOD(card_detach_card,     cardbus_detach_card),
  345 
  346         {0,0}
  347 };
  348 
  349 DEFINE_CLASS_1(cardbus, cardbus_driver, cardbus_methods,
  350     sizeof(struct cardbus_softc), pci_driver);
  351 
  352 static devclass_t cardbus_devclass;
  353 
  354 DRIVER_MODULE(cardbus, cbb, cardbus_driver, cardbus_devclass, 0, 0);
  355 MODULE_VERSION(cardbus, 1);
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FreeBSD/Linux Kernel Cross Reference sys/dev/cardbus/cardbus.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/cardbus/cardbus.c
